From 3f7e1f835c0049b37c4a0bdbc400c4615e32b001 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Thu, 20 Oct 2011 10:07:30 +0200 Subject: drivers: shrm: Add shared memory (shrm) driver Signed-off-by: Robert Marklund --- Documentation/DocBook/shrm.tmpl | 139 +++ arch/arm/mach-ux500/include/mach/shrm.h | 23 + arch/arm/mach-ux500/include/mach/shrm_config.h | 111 ++ arch/arm/mach-ux500/include/mach/shrm_driver.h | 201 ++++ arch/arm/mach-ux500/include/mach/shrm_net.h | 44 + arch/arm/mach-ux500/include/mach/shrm_private.h | 180 +++ drivers/char/Makefile | 4 + drivers/char/shrm_char.c | 858 ++++++++++++++ drivers/misc/shrm/Kconfig | 49 + drivers/misc/shrm/Makefile | 11 + drivers/misc/shrm/modem_shrm_driver.c | 667 +++++++++++ drivers/misc/shrm/shrm_driver.c | 1439 +++++++++++++++++++++++ drivers/misc/shrm/shrm_fifo.c | 829 +++++++++++++ drivers/misc/shrm/shrm_protocol.c | 1177 ++++++++++++++++++ drivers/net/Makefile | 4 + drivers/net/u8500_shrm.c | 336 ++++++ 16 files changed, 6072 insertions(+) create mode 100644 Documentation/DocBook/shrm.tmpl create mode 100644 arch/arm/mach-ux500/include/mach/shrm.h create mode 100644 arch/arm/mach-ux500/include/mach/shrm_config.h create mode 100644 arch/arm/mach-ux500/include/mach/shrm_driver.h create mode 100644 arch/arm/mach-ux500/include/mach/shrm_net.h create mode 100644 arch/arm/mach-ux500/include/mach/shrm_private.h create mode 100644 drivers/char/shrm_char.c create mode 100644 drivers/misc/shrm/Kconfig create mode 100644 drivers/misc/shrm/Makefile create mode 100644 drivers/misc/shrm/modem_shrm_driver.c create mode 100644 drivers/misc/shrm/shrm_driver.c create mode 100644 drivers/misc/shrm/shrm_fifo.c create mode 100644 drivers/misc/shrm/shrm_protocol.c create mode 100644 drivers/net/u8500_shrm.c diff --git a/Documentation/DocBook/shrm.tmpl b/Documentation/DocBook/shrm.tmpl new file mode 100644 index 00000000000..b35e1bc4e0b --- /dev/null +++ b/Documentation/DocBook/shrm.tmpl @@ -0,0 +1,139 @@ + + + + + + Shared Memory + + + Biju + Das + +
+ biju.das@stericsson.com +
+ + + + Kumar + Sanghvi + +
+ kumar.sanghvi@stericsson.com +
+ + + + Arun + Murthy + +
+ arun.murthy@stericsson.com +
+ + + + + + 2009-2010 + ST-Ericsson + + + + + Linux standard functions + + + + + + + Licence terms: GNU General Public Licence (GPL) version 2. + + + + + + + Introduction + + This Documentation describes the ST-Ericsson's adaptation on protocol used for CMT/APE communication when SHaRedMemory is used as IPC link. + + + + + Design + + The APE consists Cortex A9 dual core SMP, a multimedia DSP and PRCMU. Modem consists of 2 Cortex R4 ARM processor. + The exchange of messages between CMT(Cellular Mobile Terminal) and APE includes copying the data to a shared area DDR. This region is accessible by both CMT and APE. The design includes 2 channels common and audio. Common channel is used for exchanging ISI, RPC and SECURITY messages. Audio channel is used for exchanging AUDIO messages. Each channel consists of 2 FIFO. One FIFO for sending message from CMT to APE and other from APE to CMT. Each of these FIFO have write and read pointer shared between APE and CMT. Writer pointer is updated on copying the message to FIFO and reader will read the messages from the read pointer upto the writer pointer. Writer and reader notifications are used to notify the completion of read/write operation(seperate for APE and CMT). Driver includes 4 queues. Once the messages are sent from CMT to APE it resides in the FIFO and then copied to one of the 4 queues based on the message type(ISI, RPC, AUDIO, SECURITY) and then the net/char device interface fetches this message from the queue and copies to the user space buffer. + + + + + Concepts + + The user space application sends ISI/RPC/AUDIO/SECURITY messages. ISI is sent through the phonet to shrm driver. For achieving this there are 2 interfaces to the shrm driver. Net interface used for exchanging the ISI message and char interface for RPC, AUDIO and SECURITY messages. On receiving any of these messages from the user space application, it is copied to a memory in kernel space. From here it is then copied to respective FIFO from where the CMT reads the message. + CMT(Cellular Mobile Terminal) writes messages to the respective FIFO and thereafter to respective queue. The net/char device copies this message from the queue to the user space buffer. + + + + + Known Bugs And Assumptions + + + + None + + + Assumptions + 1. ApeShmFifo#0 is of 128kB in size. As this is used for transmission except CS audio call data. Expected message size is 1.5kB with a max of 16kB. + 2. ApeShmFifo#1 is of 4kB in size. This is used for transmission of CS audio call data. Expected message size is 24kb. + 3. CmtShmFifo#0 is of 128kB in size. As this is used for transmission except CS audio call data. Expected message size is 1.5kB with a max of 16kB. + 4. CmtShmFifo#1 is of 4kB in size. This is used for transmission of CS audio call data. Expected message size is 24kb. + The total size of the FIFO is 264 kB. + + + + + + + + + Public Functions Provided + + This Section lists the API's provided by the SHRM driver to phonet drivers. + +!Edrivers/net/u8500_shrm.c + + This Section lists the API's provided by the SHRM driver used in transmission of RPC, AUDIO and SECURITY messages. + +!Edrivers/char/shrm_char.c + + + + Private Functions + + This Section lists the functions used internally by the SHRM driver to implement FIFO management. It physically reads/writes data to/from memory. + +!Idrivers/misc/shrm/shrm_fifo.c + + This Section lists the functions used internally by the SHRM driver to implement the SHM protocol and handle all interrupt callback. + +!Idrivers/misc/shrm/shrm_protocol.c + + This Section lists the functions used internally by the SHRM driver to implement Modem-Host communication L1 interface specifications. + +!Idrivers/misc/shrm/modem_shrm_driver.c + + + + Other Data Structures + + This Section lists some of the Data structure used by the SHRM driver. + +!Iarch/arm/mach-ux500/include/mach/shrm.h +!Iarch/arm/mach-ux500/include/mach/shrm_driver.h +!Iarch/arm/mach-ux500/include/mach/shrm_private.h + + diff --git a/arch/arm/mach-ux500/include/mach/shrm.h b/arch/arm/mach-ux500/include/mach/shrm.h new file mode 100644 index 00000000000..6deeeb16ba8 --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/shrm.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHM_DRIVER_IF_H__ +#define __SHM_DRIVER_IF_H__ + +#include + +/* forward declaration */ +struct shrm_dev; + +typedef void (*rx_cb)(void *data, unsigned int length); +typedef void (*received_msg_handler)(unsigned char l2_header, + void *msg_ptr, unsigned int length, + struct shrm_dev *shrm); + +#endif diff --git a/arch/arm/mach-ux500/include/mach/shrm_config.h b/arch/arm/mach-ux500/include/mach/shrm_config.h new file mode 100644 index 00000000000..a82b35ef77b --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/shrm_config.h @@ -0,0 +1,111 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_CONFIG_H +#define __SHRM_CONFIG_H + + +/* +Note: modem need to define IPC as a non-cacheable area. +In Cortex R4 MPU requires that base address of NC area is aligned on a +region-sized boundary.On modem side, only 1 NC area can be defined, hence +the whole IPC area must be defined as NC (at least). + +*/ + +/* cache line size = 32bytes*/ +#define SHM_CACHE_LINE 32 +#define SHM_PTR_SIZE 4 + +/* FIFO 0 address configuration */ +/* ---------------------------- */ +/* 128KB */ +#define SHM_FIFO_0_SIZE (128*1024) + + +/* == APE addresses == */ +#ifdef CONFIG_SHRM_V1_UPDATES_VERSION +#define SHM_IPC_BASE_AMCU 0x06F80000 +#else +#define SHM_IPC_BASE_AMCU 0x06000000 +#endif + +/* offset pointers */ +#define SHM_ACFIFO_0_WRITE_AMCU SHM_IPC_BASE_AMCU +#define SHM_ACFIFO_0_READ_AMCU (SHM_ACFIFO_0_WRITE_AMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_0_WRITE_AMCU (SHM_ACFIFO_0_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_READ_AMCU (SHM_CAFIFO_0_WRITE_AMCU + SHM_PTR_SIZE) +/* FIFO start */ +#define SHM_ACFIFO_0_START_AMCU (SHM_CAFIFO_0_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_START_AMCU (SHM_ACFIFO_0_START_AMCU + SHM_FIFO_0_SIZE) + + +/* == CMT addresses ==*/ +#define SHM_IPC_BASE_CMCU (SHM_IPC_BASE_AMCU+0x08000000) +/* offset pointers */ +#define SHM_ACFIFO_0_WRITE_CMCU SHM_IPC_BASE_CMCU +#define SHM_ACFIFO_0_READ_CMCU (SHM_ACFIFO_0_WRITE_CMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_0_WRITE_CMCU (SHM_ACFIFO_0_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_READ_CMCU (SHM_CAFIFO_0_WRITE_CMCU + SHM_PTR_SIZE) +/* FIFO*/ +#define SHM_ACFIFO_0_START_CMCU (SHM_CAFIFO_0_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_START_CMCU (SHM_ACFIFO_0_START_CMCU + SHM_FIFO_0_SIZE) + + +/* ADSP addresses*/ +#define SHM_ACFIFO_0_START_ADSP 0x0 +#define SHM_CAFIFO_0_START_ADSP 0x0 +#define SHM_ACFIFO_0_WRITE_ADSP 0x0 +#define SHM_ACFIFO_0_READ_ADSP 0x0 +#define SHM_CAFIFO_0_WRITE_ADSP 0x0 +#define SHM_CAFIFO_0_READ_ADSP 0x0 + +/* FIFO 1 address configuration */ +/* ---------------------------- */ + + +/* FIFO 1 - 4K */ +#define SHM_FIFO_1_SIZE (4*1024) + + +/* == APE addresses == */ +#define SHM_ACFIFO_1_WRITE_AMCU (SHM_CAFIFO_0_START_AMCU + SHM_FIFO_0_SIZE) +#define SHM_ACFIFO_1_READ_AMCU (SHM_ACFIFO_1_WRITE_AMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_1_WRITE_AMCU (SHM_ACFIFO_1_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_READ_AMCU (SHM_CAFIFO_1_WRITE_AMCU + SHM_PTR_SIZE) +/* FIFO*/ +#define SHM_ACFIFO_1_START_AMCU (SHM_CAFIFO_1_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_START_AMCU (SHM_ACFIFO_1_START_AMCU + SHM_FIFO_1_SIZE) + + +/* == CMT addresses ==*/ +#define SHM_ACFIFO_1_WRITE_CMCU (SHM_CAFIFO_0_START_CMCU + SHM_FIFO_0_SIZE) +#define SHM_ACFIFO_1_READ_CMCU (SHM_ACFIFO_1_WRITE_CMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_1_WRITE_CMCU (SHM_ACFIFO_1_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_READ_CMCU (SHM_CAFIFO_1_WRITE_CMCU + SHM_PTR_SIZE) +/* FIFO1 start */ +#define SHM_ACFIFO_1_START_CMCU (SHM_CAFIFO_1_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_START_CMCU (SHM_ACFIFO_1_START_CMCU + SHM_FIFO_1_SIZE) + + +/* ADSP addresses*/ +#define SHM_ACFIFO_1_START_ADSP 0x0 +#define SHM_CAFIFO_1_START_ADSP 0x0 +#define SHM_ACFIFO_1_WRITE_ADSP 0x0 +#define SHM_ACFIFO_1_READ_ADSP 0x0 +#define SHM_CAFIFO_1_WRITE_ADSP 0x0 +#define SHM_CAFIFO_1_READ_ADSP 0x0 + + +#define U8500_SHM_FIFO_APE_COMMON_BASE (SHM_ACFIFO_0_START_AMCU) +#define U8500_SHM_FIFO_CMT_COMMON_BASE (SHM_CAFIFO_0_START_AMCU) +#define U8500_SHM_FIFO_APE_AUDIO_BASE (SHM_ACFIFO_1_START_AMCU) +#define U8500_SHM_FIFO_CMT_AUDIO_BASE (SHM_CAFIFO_1_START_AMCU) + +#endif /* __SHRM_CONFIG_H */ diff --git a/arch/arm/mach-ux500/include/mach/shrm_driver.h b/arch/arm/mach-ux500/include/mach/shrm_driver.h new file mode 100644 index 00000000000..41f518238b3 --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/shrm_driver.h @@ -0,0 +1,201 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_DRIVER_H__ +#define __SHRM_DRIVER_H__ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include + +#define ISA_DEVICES 6 + +#define BOOT_INIT (0) +#define BOOT_INFO_SYNC (1) +#define BOOT_DONE (2) +#define BOOT_UNKNOWN (3) + +/** + * struct shrm_dev - shrm device information + * @ca_wake_irq: CMT wake interrupt number + * @ac_read_notif_0_irq: ape-cmt common channel read notify interrupt + * @ac_read_notif_1_irq: ape-cmt audio channel read notify interrupt + * @ca_msg_pending_notif_0_irq: cmt-ape common channel msg pending interrupt + * @ca_msg_pending_notif_1_irq: cmt-ape audio channel msg pending interrupt + * @intr_base: interrupt base register address + * @ape_common_fifo_base: ape side common channel fifo base addr + * @ape_audio_fifo_base: ape side audio channel fifo base addr + * @cmt_common_fifo_base: cmt side common channel fifo base addr + * @cmt_audio_fifo_base: cmt side audio channel fifo base addr + * @ape_common_fifo_base_phy: physical addr of ape common fifo + * @ape_audio_fifo_base_phy: physical addr of ape audio fifo + * @cmt_common_fifo_base_phy: physical addr of cmt common fifo + * @cmt_audio_fifo_base_phy: physical addr of cmt audio fifo + * @ape_common_fifo_size: ape side common channel fifo size + * @ape_audio_fifo_size: ape side audio channel fifo size + * @cmt_common_fifo_size: cmt side common channel fifo size + * @cmt_audio_fifo_size: cmt side audio channel fifo size + * @netdev_flag_up: flag to indicate up/down of netwok device + * @msr_flag: flag to check on-going MSR sequence + * @ac_common_shared_wptr: ape-cmt common channel write pointer + * @ac_common_shared_rptr: ape-cmt common channel read pointer + * @ca_common_shared_wptr: cmt-ape common channel write pointer + * @ca_common_shared_rptr: cmt-ape common channel read pointer + * @ac_audio_shared_wptr: ape-cmt audio channel write pointer + * @ac_audio_shared_rptr: ape-cmt audio channel read pointer + * @ca_audio_shared_wptr: cmt-ape audio channel write pointer + * @ca_audio_shared_rptr: cmt-ape audio channel read pointer + * @dev: pointer to the driver device + * @ndev: pointer to the network device structure + * @isa_context: pointer to t_isa_driver_sontext dtructure + * @shm_common_ch_wr_wq: work queue for writing to common channel + * @shm_audio_ch_wr_wq: workqueue for writing to audio channel + * @shm_ac_wake_wq: workqueue for receiving ape-cmt wake requests + * @shm_ca_wake_wq: workqueue for receiving cmt-ape wake requests + * @shm_ac_sleep_wq: workqueue for recieving ape-cmt sleep requests + * @send_ac_msg_pend_notify_0: work for handling pending message on common + * channel + * @send_ac_msg_pend_notify_1: work for handling pending message on audio + * channel + * @shm_ac_wake_req: work to send ape-cmt wake request + * @shm_ca_wake_req: work to send cmt-ape wake request + * @shm_ca_sleep_req: work to send cmt-ape sleep request + * @shm_ac_sleep_req: work to send ape-cmt sleep request + */ +struct shrm_dev { + u8 ca_wake_irq; + u8 ac_read_notif_0_irq; + u8 ac_read_notif_1_irq; + u8 ca_msg_pending_notif_0_irq; + u8 ca_msg_pending_notif_1_irq; + void __iomem *intr_base; + void __iomem *ape_common_fifo_base; + void __iomem *ape_audio_fifo_base; + void __iomem *cmt_common_fifo_base; + void __iomem *cmt_audio_fifo_base; + + u32 *ape_common_fifo_base_phy; + u32 *ape_audio_fifo_base_phy; + u32 *cmt_common_fifo_base_phy; + u32 *cmt_audio_fifo_base_phy; + + int ape_common_fifo_size; + int ape_audio_fifo_size; + int cmt_common_fifo_size; + int cmt_audio_fifo_size; + int netdev_flag_up; + int msr_flag; + + void __iomem *ac_common_shared_wptr; + void __iomem *ac_common_shared_rptr; + void __iomem *ca_common_shared_wptr; + void __iomem *ca_common_shared_rptr; + + void __iomem *ac_audio_shared_wptr; + void __iomem *ac_audio_shared_rptr; + void __iomem *ca_audio_shared_wptr; + void __iomem *ca_audio_shared_rptr; + + struct device *dev; + struct net_device *ndev; + struct isa_driver_context *isa_context; + struct workqueue_struct *shm_common_ch_wr_wq; + struct workqueue_struct *shm_audio_ch_wr_wq; + struct workqueue_struct *shm_ac_wake_wq; + struct workqueue_struct *shm_ca_wake_wq; + struct workqueue_struct *shm_ac_sleep_wq; + struct work_struct send_ac_msg_pend_notify_0; + struct work_struct send_ac_msg_pend_notify_1; + struct work_struct shm_ac_wake_req; + struct work_struct shm_ca_wake_req; + struct work_struct shm_ca_sleep_req; + struct work_struct shm_ac_sleep_req; +}; + +/** + * struct queue_element - information to add an element to queue + * @entry: list entry + * @offset: message offset + * @size: message size + * @no: total number of messages + */ +struct queue_element { + struct list_head entry; + u32 offset; + u32 size; + u32 no; +}; + +/** + * struct message_queue - ISI, RPC, AUDIO, SECURITY message queue information + * @fifo_base: pointer to the respective fifo base + * @size: size of the data to be read + * @readptr: fifo read pointer + * @writeptr: fifo write pointer + * @no: total number of messages + * @update_lock: spinlock for protecting the queue read operation + * @q_rp: queue write pointer + * @wq_readable: wait queue head + * @msg_list: message list + * @shrm: pointer to shrm device information structure + */ +struct message_queue { + u8 *fifo_base; + u32 size; + u32 readptr; + u32 writeptr; + u32 no; + spinlock_t update_lock; + atomic_t q_rp; + wait_queue_head_t wq_readable; + struct list_head msg_list; + struct shrm_dev *shrm; +}; + +/** + * struct isadev_context - shrm char interface context + * @dl_queue: structre to store the queue related info + * @device_id: message id(ISI, RPC, AUDIO, SECURITY) + */ +struct isadev_context { + struct message_queue dl_queue; + u8 device_id; + void *addr; +}; + +/** + * struct isa_driver_context - shrm char interface device information + * @is_open: flag to check the usage of queue + * @isadev: pointer to struct t_isadev_context + * @common_tx: spinlock for protecting common channel + * @tx_audio_mutex: mutex for protecting audio channel + * @cdev: character device structre + * @shm_class: pointer to the class structure + */ +struct isa_driver_context { + atomic_t is_open[ISA_DEVICES]; + struct isadev_context *isadev; + spinlock_t common_tx; + struct mutex tx_audio_mutex; + struct cdev cdev; + struct class *shm_class; +}; + +#endif diff --git a/arch/arm/mach-ux500/include/mach/shrm_net.h b/arch/arm/mach-ux500/include/mach/shrm_net.h new file mode 100644 index 00000000000..4e675a98f3d --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/shrm_net.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) ST-Ericsson SA 2009 + * + * Author: Kumar Sanghvi for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_NET_H +#define __SHRM_NET_H + +#define SHRM_HLEN 1 +#define PHONET_ALEN 1 + +#define PN_PIPE 0xD9 +#define PN_DEV_HOST 0x00 +#define PN_LINK_ADDR 0x26 +#define PN_TX_QUEUE_LEN 3 + +#define RESOURCE_ID_INDEX 3 +#define SRC_OBJ_INDEX 7 +#define MSG_ID_INDEX 9 +#define PIPE_HDL_INDEX 10 +#define NETLINK_SHRM 20 + +/** + * struct shrm_net_iface_priv - shrm net interface device information + * @shrm_device: pointer to the shrm device information structure + * @iface_num: flag used to indicate the up/down of netdev + */ +struct shrm_net_iface_priv { + struct shrm_dev *shrm_device; + unsigned int iface_num; +}; + +int shrm_register_netdev(struct shrm_dev *shrm_dev_data); +int shrm_net_receive(struct net_device *dev, unsigned char *data); +int shrm_suspend_netdev(struct net_device *dev); +int shrm_resume_netdev(struct net_device *dev); +int shrm_stop_netdev(struct net_device *dev); +int shrm_restart_netdev(struct net_device *dev); +int shrm_start_netdev(struct net_device *dev); +void shrm_unregister_netdev(struct shrm_dev *shrm_dev_data); + +#endif /* __SHRM_NET_H */ diff --git a/arch/arm/mach-ux500/include/mach/shrm_private.h b/arch/arm/mach-ux500/include/mach/shrm_private.h new file mode 100644 index 00000000000..33a0e18234b --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/shrm_private.h @@ -0,0 +1,180 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_PRIVATE_INCLUDED +#define __SHRM_PRIVATE_INCLUDED + +#include +#include +#include +#include + +#define GOP_OUTPUT_REGISTER_BASE (0x0) +#define GOP_SET_REGISTER_BASE (0x4) +#define GOP_CLEAR_REGISTER_BASE (0x8) +#define GOP_TOGGLE_REGISTER_BASE (0xc) + + +#define GOP_AUDIO_AC_READ_NOTIFICATION_BIT (0) +#define GOP_AUDIO_CA_MSG_PENDING_NOTIFICATION_BIT (1) +#define GOP_COMMON_AC_READ_NOTIFICATION_BIT (2) +#define GOP_COMMON_CA_MSG_PENDING_NOTIFICATION_BIT (3) +#define GOP_CA_WAKE_REQ_BIT (7) +#define GOP_AUDIO_CA_READ_NOTIFICATION_BIT (23) +#define GOP_AUDIO_AC_MSG_PENDING_NOTIFICATION_BIT (24) +#define GOP_COMMON_CA_READ_NOTIFICATION_BIT (25) +#define GOP_COMMON_AC_MSG_PENDING_NOTIFICATION_BIT (26) +#define GOP_CA_WAKE_ACK_BIT (27) + +#define L2_MSG_MAPID_OFFSET (24) +#define L1_MSG_MAPID_OFFSET (28) + +#define SHRM_SLEEP_STATE (0) +#define SHRM_PTR_FREE (1) +#define SHRM_PTR_BUSY (2) +#define SHRM_IDLE (3) + +#define ISI_MESSAGING (0) +#define RPC_MESSAGING (1) +#define AUDIO_MESSAGING (2) +#define SECURITY_MESSAGING (3) +#define COMMON_LOOPBACK_MESSAGING (0xC0) +#define AUDIO_LOOPBACK_MESSAGING (0x80) + +#define COMMON_CHANNEL 0 +#define AUDIO_CHANNEL 1 + +typedef void (*MSG_PENDING_NOTIF)(const u32 Wptr); + +/** + * struct fifo_write_params - parameters used for FIFO write operation. + * @writer_local_rptr: pointer to local read buffer + * @writer_local_wptr: pointer to local write buffer + * @shared_wptr: write pointer shared by cmt and ape + * @shared_rptr: read pointer shared by cmt and ape + * @availablesize: available memory in fifo + * @end_addr_fifo: fifo end addr + * @fifo_virtual_addr: fifo virtual addr + * + * On writting a message to FIFO the same has to be read by the modem before + * writing the next message to the FIFO. In oder to over come this a local + * write and read pointer is used for internal purpose. + */ +struct fifo_write_params { + u32 writer_local_rptr; + u32 writer_local_wptr; + u32 shared_wptr; + u32 shared_rptr; + u32 availablesize; + u32 end_addr_fifo; + u32 *fifo_virtual_addr; + spinlock_t fifo_update_lock; +} ; + +/** + * struct fifo_read_params - parameters used for FIFO read operation + * @reader_local_rptr: pointer to local read buffer + * @reader_local_wptr: pointer to local write buffer + * @shared_wptr: write pointer shared by cmt and ape + * @shared_rptr: read pointer shared by cmt and ape + * @availablesize: available memory in fifo + * @end_addr_fifo: fifo end add + * @fifo_virtual_addr: fifo virtual addr + */ +struct fifo_read_params{ + u32 reader_local_rptr; + u32 reader_local_wptr; + u32 shared_wptr; + u32 shared_rptr; + u32 availablesize; + u32 end_addr_fifo; + u32 *fifo_virtual_addr; + +} ; + +int shrm_protocol_init(struct shrm_dev *shrm, + received_msg_handler common_rx_handler, + received_msg_handler audio_rx_handler); +void shrm_protocol_deinit(struct shrm_dev *shrm); +void shm_fifo_init(struct shrm_dev *shrm); +int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, + u8 l2header, void *addr, u32 length); +int shm_write_msg(struct shrm_dev *shrm, + u8 l2_header, void *addr, u32 length); + +u8 is_the_only_one_unread_message(struct shrm_dev *shrm, + u8 channel, u32 length); +u8 read_remaining_messages_common(void); +u8 read_remaining_messages_audio(void); +u8 read_one_l2msg_audio(struct shrm_dev *shrm, + u8 *p_l2_msg, u32 *p_len); +u8 read_one_l2msg_common(struct shrm_dev *shrm, + u8 *p_l2_msg, u32 *p_len); +void receive_messages_common(struct shrm_dev *shrm); +void receive_messages_audio(struct shrm_dev *shrm); + +void update_ac_common_local_rptr(struct shrm_dev *shrm); +void update_ac_audio_local_rptr(struct shrm_dev *shrm); +void update_ca_common_local_wptr(struct shrm_dev *shrm); +void update_ca_audio_local_wptr(struct shrm_dev *shrm); +void update_ac_common_shared_wptr(struct shrm_dev *shrm); +void update_ac_audio_shared_wptr(struct shrm_dev *shrm); +void update_ca_common_shared_rptr(struct shrm_dev *shrm); +void update_ca_audio_shared_rptr(struct shrm_dev *shrm); + + +void get_writer_pointers(u8 msg_type, u32 *WriterLocalRptr, \ + u32 *WriterLocalWptr, u32 *SharedWptr); +void get_reader_pointers(u8 msg_type, u32 *ReaderLocalRptr, \ + u32 *ReaderLocalWptr, u32 *SharedRptr); +u8 read_boot_info_req(struct shrm_dev *shrm, + u32 *pConfig, + u32 *pVersion); +void write_boot_info_resp(struct shrm_dev *shrm, u32 Config, + u32 Version); + +void send_ac_msg_pending_notification_0(struct shrm_dev *shrm); +void send_ac_msg_pending_notification_1(struct shrm_dev *shrm); +void ca_msg_read_notification_0(struct shrm_dev *shrm); +void ca_msg_read_notification_1(struct shrm_dev *shrm); + +void set_ca_msg_0_read_notif_send(u8 val); +u8 get_ca_msg_0_read_notif_send(void); +void set_ca_msg_1_read_notif_send(u8 val); +u8 get_ca_msg_1_read_notif_send(void); + +irqreturn_t ca_wake_irq_handler(int irq, void *ctrlr); +irqreturn_t ac_read_notif_0_irq_handler(int irq, void *ctrlr); +irqreturn_t ac_read_notif_1_irq_handler(int irq, void *ctrlr); +irqreturn_t ca_msg_pending_notif_0_irq_handler(int irq, void *ctrlr); +irqreturn_t ca_msg_pending_notif_1_irq_handler(int irq, void *ctrlr); + +void shm_ca_msgpending_0_tasklet(unsigned long); +void shm_ca_msgpending_1_tasklet(unsigned long); +void shm_ac_read_notif_0_tasklet(unsigned long); +void shm_ac_read_notif_1_tasklet(unsigned long); +void shm_ca_wake_req_tasklet(unsigned long); + +u8 get_boot_state(void); + +int get_ca_wake_req_state(void); + +/* shrm character interface */ +int isa_init(struct shrm_dev *shrm); +void isa_exit(struct shrm_dev *shrm); +int add_msg_to_queue(struct message_queue *q, u32 size); +ssize_t isa_read(struct file *filp, char __user *buf, size_t len, + loff_t *ppos); +int get_size_of_new_msg(struct message_queue *q); +int remove_msg_from_queue(struct message_queue *q); +void shrm_char_reset_queues(struct shrm_dev *shrm); +int shrm_get_cdev_index(u8 l2_header); +int shrm_get_cdev_l2header(u8 idx); + +#endif diff --git a/drivers/char/Makefile b/drivers/char/Makefile index 32762ba769c..63ee6d87492 100644 --- a/drivers/char/Makefile +++ b/drivers/char/Makefile @@ -50,6 +50,10 @@ obj-$(CONFIG_NSC_GPIO) += nsc_gpio.o obj-$(CONFIG_GPIO_TB0219) += tb0219.o obj-$(CONFIG_TELCLOCK) += tlclk.o +ifdef CONFIG_PHONET +obj-$(CONFIG_U8500_SHRM) += shrm_char.o +endif + obj-$(CONFIG_MWAVE) += mwave/ obj-$(CONFIG_AGP) += agp/ obj-$(CONFIG_PCMCIA) += pcmcia/ diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c new file mode 100644 index 00000000000..256add7cdb8 --- /dev/null +++ b/drivers/char/shrm_char.c @@ -0,0 +1,858 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + + +#define NAME "IPC_ISA" +/* L2 header for common loopback device is 0xc0 and hence 0xc0+1 = 193*/ +#define MAX_L2_HEADERS 193 + +#define SIZE_OF_FIFO (512*1024) + +static u8 message_fifo[ISA_DEVICES][SIZE_OF_FIFO]; + +static u8 wr_rpc_msg[10*1024]; +static u8 wr_sec_msg[10*1024]; +static u8 wr_audio_msg[10*1024]; + +struct map_device { + u8 l2_header; + u8 idx; + char *name; +}; + +static struct map_device map_dev[] = { + {ISI_MESSAGING, 0, "isi"}, + {RPC_MESSAGING, 1, "rpc"}, + {AUDIO_MESSAGING, 2, "modemaudio"}, + {SECURITY_MESSAGING, 3, "sec"}, + {COMMON_LOOPBACK_MESSAGING, 4, "common_loopback"}, + {AUDIO_LOOPBACK_MESSAGING, 5, "audio_loopback"}, +}; + +/* + * int major:This variable is exported to user as module_param to specify + * major number at load time + */ +static int major; +module_param(major, int, 0); +MODULE_PARM_DESC(major, "Major device number"); +/* global fops mutex */ +static DEFINE_MUTEX(isa_lock); + +/** + * shrm_get_cdev_index() - return the index mapped to l2 header + * @l2_header: L2 header + * + * struct map_device maps the index(count) with the device L2 header. + * This function returns the index for the provided L2 header in case + * of success else -ve value. + */ +int shrm_get_cdev_index(u8 l2_header) +{ + u8 cnt; + for (cnt = 0; cnt < ISA_DEVICES; cnt++) { + if (map_dev[cnt].l2_header == l2_header) + return map_dev[cnt].idx; + } + return -EINVAL; +} + +/** + * shrm_get_cdev_l2header() - return l2_header mapped to the index + * @idx: index + * + * struct map_device maps the index(count) with the device L2 header. + * This function returns the L2 header for the given index in case + * of success else -ve value. + */ +int shrm_get_cdev_l2header(u8 idx) +{ + u8 cnt; + for (cnt = 0; cnt < ISA_DEVICES; cnt++) { + if (map_dev[cnt].idx == idx) + return map_dev[cnt].l2_header; + } + return -EINVAL; +} + +void shrm_char_reset_queues(struct shrm_dev *shrm) +{ + struct isadev_context *isadev; + struct isa_driver_context *isa_context; + struct queue_element *cur_msg = NULL; + struct list_head *cur_msg_ptr = NULL; + struct list_head *msg_ptr; + struct message_queue *q; + int no_dev; + + dev_info(shrm->dev, "%s: Resetting char device queues\n", __func__); + isa_context = shrm->isa_context; + for (no_dev = 0 ; no_dev < ISA_DEVICES ; no_dev++) { + isadev = &isa_context->isadev[no_dev]; + q = &isadev->dl_queue; + + /* empty out the msg queue */ + list_for_each_safe(cur_msg_ptr, msg_ptr, &q->msg_list) { + cur_msg = list_entry(cur_msg_ptr, + struct queue_element, entry); + list_del(cur_msg_ptr); + kfree(cur_msg); + } + + /* reset the msg queue pointers */ + q->size = SIZE_OF_FIFO; + q->readptr = 0; + q->writeptr = 0; + q->no = 0; + + /* wake up the blocking read/select */ + atomic_set(&q->q_rp, 1); + wake_up_interruptible(&q->wq_readable); + } +} + +/** + * create_queue() - To create FIFO for Tx and Rx message buffering. + * @q: message queue. + * @devicetype: device type 0-isi,1-rpc,2-audio,3-security, + * 4-common_loopback, 5-audio_loopback. + * @shrm: pointer to the shrm device information structure + * + * This function creates a FIFO buffer of n_bytes size using + * dma_alloc_coherent(). It also initializes all queue handling + * locks, queue management pointers. It also initializes message list + * which occupies this queue. + */ +static int create_queue(struct message_queue *q, u32 devicetype, + struct shrm_dev *shrm) +{ + q->fifo_base = (u8 *)&message_fifo[devicetype]; + q->size = SIZE_OF_FIFO; + q->readptr = 0; + q->writeptr = 0; + q->no = 0; + q->shrm = shrm; + spin_lock_init(&q->update_lock); + INIT_LIST_HEAD(&q->msg_list); + init_waitqueue_head(&q->wq_readable); + atomic_set(&q->q_rp, 0); + + return 0; +} + +static void delete_queue(struct message_queue *q) +{ + q->size = 0; + q->readptr = 0; + q->writeptr = 0; +} + +/** + * add_msg_to_queue() - Add a message inside queue + * @q: message queue + * @size: size in bytes + * + * This function tries to allocate n_bytes of size in FIFO q. + * It returns negative number when no memory can be allocated + * currently. + */ +int add_msg_to_queue(struct message_queue *q, u32 size) +{ + struct queue_element *new_msg = NULL; + struct shrm_dev *shrm = q->shrm; + + dev_dbg(shrm->dev, "%s IN q->writeptr=%d\n", __func__, q->writeptr); + new_msg = kmalloc(sizeof(struct queue_element), GFP_ATOMIC); + if (new_msg == NULL) { + dev_err(shrm->dev, "unable to allocate memory\n"); + return -ENOMEM; + } + new_msg->offset = q->writeptr; + new_msg->size = size; + new_msg->no = q->no++; + + /* check for overflow condition */ + if (q->readptr <= q->writeptr) { + if (((q->writeptr-q->readptr) + size) >= q->size) { + dev_err(shrm->dev, "Buffer overflow !!\n"); + BUG_ON(((q->writeptr-q->readptr) + size) >= q->size); + } + } else { + if ((q->writeptr + size) >= q->readptr) { + dev_err(shrm->dev, "Buffer overflow !!\n"); + BUG_ON((q->writeptr + size) >= q->readptr); + } + } + q->writeptr = (q->writeptr + size) % q->size; + if (list_empty(&q->msg_list)) { + list_add_tail(&new_msg->entry, &q->msg_list); + /* There can be 2 blocking calls read and another select */ + atomic_set(&q->q_rp, 1); + wake_up_interruptible(&q->wq_readable); + } else + list_add_tail(&new_msg->entry, &q->msg_list); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; +} + +/** + * remove_msg_from_queue() - To remove a message from the msg queue. + * @q: message queue + * + * This function delets a message from the message list associated with message + * queue q and also updates read ptr. + * If the message list is empty, then, event is set to block the select and + * read calls of the paricular queue. + * + * The message list is FIFO style and message is always added to tail and + * removed from head. + */ +int remove_msg_from_queue(struct message_queue *q) +{ + struct queue_element *old_msg = NULL; + struct shrm_dev *shrm = q->shrm; + struct list_head *msg; + + dev_dbg(shrm->dev, "%s IN q->readptr %d\n", __func__, q->readptr); + + list_for_each(msg, &q->msg_list) { + old_msg = list_entry(msg, struct queue_element, entry); + if (old_msg == NULL) { + dev_err(shrm->dev, "no message found\n"); + return -EFAULT; + } + break; + } + list_del(msg); + q->readptr = (q->readptr + old_msg->size)%q->size; + if (list_empty(&q->msg_list)) { + dev_dbg(shrm->dev, "List is empty setting RP= 0\n"); + atomic_set(&q->q_rp, 0); + } + kfree(old_msg); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; +} + +/** + * get_size_of_new_msg() - retrieve new message from message list + * @q: message queue + * + * This function will retrieve most recent message from the corresponding + * queue list. New message is always retrieved from head side. + * It returns new message no, offset if FIFO and size. + */ +int get_size_of_new_msg(struct message_queue *q) +{ + struct queue_element *new_msg = NULL; + struct list_head *msg_list; + struct shrm_dev *shrm = q->shrm; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + spin_lock_bh(&q->update_lock); + list_for_each(msg_list, &q->msg_list) { + new_msg = list_entry(msg_list, struct queue_element, entry); + if (new_msg == NULL) { + spin_unlock_bh(&q->update_lock); + dev_err(shrm->dev, "no message found\n"); + return -EFAULT; + } + break; + } + spin_unlock_bh(&q->update_lock); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return new_msg->size; +} + +/** + * isa_select() - shrm char interface driver select interface + * @filp: file descriptor pointer + * @wait: poll_table_struct pointer + * + * This function is used to perform non-blocking read operations. It allows + * a process to determine whether it can read from one or more open files + * without blocking. These calls can also block a process until any of a + * given set of file descriptors becomes available for reading. + * If a file is ready to read, POLLIN | POLLRDNORM bitmask is returned. + * The driver method is called whenever the user-space program performs a select + * system call involving a file descriptor associated with the driver. + */ +static u32 isa_select(struct file *filp, + struct poll_table_struct *wait) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + u32 mask = 0; + u32 m = iminor(filp->f_path.dentry->d_inode); + u8 idx = shrm_get_cdev_index(m); + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (shrm->msr_flag) + return -ENODEV; + + if (isadev->device_id != idx) + return -1; + + q = &isadev->dl_queue; + poll_wait(filp, &q->wq_readable, wait); + if (atomic_read(&q->q_rp) == 1) + mask = POLLIN | POLLRDNORM; + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return mask; +} + +/** + * isa_read() - Read from device + * @filp: file descriptor + * @buf: user buffer pointer + * @len: size of requested data transfer + * @ppos: not used + * + * It reads a oldest message from queue and copies it into user buffer and + * returns its size. + * If there is no message present in queue, then it blocks until new data is + * available. + */ +ssize_t isa_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos) +{ + u32 size = 0; + int ret; + char *psrc; + struct isadev_context *isadev = (struct isadev_context *) + filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + u32 msgsize; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (len <= 0) + return -EFAULT; + + q = &isadev->dl_queue; + + if (shrm->msr_flag) { + atomic_set(&q->q_rp, 0); + return -ENODEV; + } + + spin_lock_bh(&q->update_lock); + if (list_empty(&q->msg_list)) { + spin_unlock_bh(&q->update_lock); + dev_dbg(shrm->dev, "Waiting for Data\n"); + if (wait_event_interruptible(q->wq_readable, + atomic_read(&q->q_rp) == 1)) + return -ERESTARTSYS; + } else + spin_unlock_bh(&q->update_lock); + + if (shrm->msr_flag) { + atomic_set(&q->q_rp, 0); + return -ENODEV; + } + + msgsize = get_size_of_new_msg(q); + + if (len < msgsize) + return -EINVAL; + + if ((q->readptr+msgsize) >= q->size) { + dev_dbg(shrm->dev, "Inside Loop Back\n"); + psrc = (char *)buf; + size = (q->size-q->readptr); + /* Copy First Part of msg */ + if (copy_to_user(psrc, + (u8 *)(q->fifo_base+q->readptr), + size)) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + if (copy_to_user(psrc, + (u8 *)(q->fifo_base), + (msgsize-size))) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + } else { + if (copy_to_user(buf, + (u8 *)(q->fifo_base + q->readptr), + msgsize)) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + } + spin_lock_bh(&q->update_lock); + ret = remove_msg_from_queue(q); + if (ret < 0) { + dev_err(shrm->dev, + "Remove msg from message queue failed\n"); + msgsize = ret; + } + spin_unlock_bh(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return msgsize; +} + +/** + * isa_write() - Write to shrm char device + * @filp: file descriptor + * @buf: user buffer pointer + * @len: size of requested data transfer + * @ppos: not used + * + * It checks if there is space available in queue, and copies the message + * inside queue. If there is no space, it blocks until space becomes available. + * It also schedules transfer thread to transmit the newly added message. + */ +ssize_t isa_write(struct file *filp, const char __user *buf, + size_t len, loff_t *ppos) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + void *addr = 0; + int err, l2_header; + int ret = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (len <= 0 || buf == NULL) + return -EFAULT; + q = &isadev->dl_queue; + l2_header = shrm_get_cdev_l2header(isadev->device_id); + if (l2_header < 0) { + dev_err(shrm->dev, "failed to get L2 header\n"); + return l2_header; + } + + switch (l2_header) { + case RPC_MESSAGING: + dev_dbg(shrm->dev, "RPC\n"); + addr = (void *)wr_rpc_msg; + break; + case AUDIO_MESSAGING: + dev_dbg(shrm->dev, "Audio\n"); + addr = (void *)wr_audio_msg; + break; + case SECURITY_MESSAGING: + dev_dbg(shrm->dev, "Security\n"); + addr = (void *)wr_sec_msg; + break; + case COMMON_LOOPBACK_MESSAGING: + dev_dbg(shrm->dev, "Common loopback\n"); + addr = isadev->addr; + break; + case AUDIO_LOOPBACK_MESSAGING: + dev_dbg(shrm->dev, "Audio loopback\n"); + addr = isadev->addr; + break; + default: + dev_dbg(shrm->dev, "Wrong device\n"); + return -EFAULT; + } + + if (copy_from_user(addr, buf, len)) { + dev_err(shrm->dev, "copy_from_user failed\n"); + return -EFAULT; + } + /* Write msg to Fifo */ + if ((l2_header == AUDIO_MESSAGING) || + (l2_header == AUDIO_LOOPBACK_MESSAGING)) { + mutex_lock(&shrm->isa_context->tx_audio_mutex); + err = shm_write_msg(shrm, l2_header, addr, len); + if (!err) + ret = len; + else + ret = err; + mutex_unlock(&shrm->isa_context->tx_audio_mutex); + } else { + spin_lock_bh(&shrm->isa_context->common_tx); + err = shm_write_msg(shrm, l2_header, addr, len); + if (!err) + ret = len; + else + ret = err; + spin_unlock_bh(&shrm->isa_context->common_tx); + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * isa_ioctl() - To handle different ioctl commands supported by driver. + * @inode: structure is used by the kernel internally to represent files + * @filp: file descriptor pointer + * @cmd: ioctl command + * @arg: input param + * + * Following ioctls are supported by this driver. + * DLP_IOCTL_ALLOCATE_BUFFER - To allocate buffer for new uplink message. + * This ioctl is called with required message size. It returns offset for + * the allocates space in the queue. DLP_IOCTL_PUT_MESSAGE - To indicate + * new uplink message available in queuq for transmission. Message is copied + * from offset location returned by previous ioctl before calling this ioctl. + * DLP_IOCTL_GET_MESSAGE - To check if any downlink message is available in + * queue. It returns offset for new message inside queue. + * DLP_IOCTL_DEALLOCATE_BUFFER - To deallocate any buffer allocate for + * downlink message once the message is copied. Message is copied from offset + * location returned by previous ioctl before calling this ioctl. + */ +static int isa_ioctl(struct inode *inode, struct file *filp, + unsigned cmd, unsigned long arg) +{ + int err = 0; + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + u32 m = iminor(inode); + + isadev = (struct isadev_context *)filp->private_data; + + if (isadev->device_id != m) + return -EINVAL; + + switch (cmd) { + case DLP_IOC_ALLOCATE_BUFFER: + dev_dbg(shrm->dev, "DLP_IOC_ALLOCATE_BUFFER\n"); + break; + case DLP_IOC_PUT_MESSAGE: + dev_dbg(shrm->dev, "DLP_IOC_PUT_MESSAGE\n"); + break; + case DLP_IOC_GET_MESSAGE: + dev_dbg(shrm->dev, "DLP_IOC_GET_MESSAGE\n"); + break; + case DLP_IOC_DEALLOCATE_BUFFER: + dev_dbg(shrm->dev, "DLP_IOC_DEALLOCATE_BUFFER\n"); + break; + default: + dev_dbg(shrm->dev, "Unknown IOCTL\n"); + err = -EFAULT; + break; + } + return err; +} +/** + * isa_mmap() - Maps kernel queue memory to user space. + * @filp: file descriptor pointer + * @vma: virtual area memory structure. + * + * This function maps kernel FIFO into user space. This function + * shall be called twice to map both uplink and downlink buffers. + */ +static int isa_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + + u32 m = iminor(filp->f_path.dentry->d_inode); + dev_dbg(shrm->dev, "%s %d\n", __func__, m); + + return 0; +} + +/** + * isa_close() - Close device file + * @inode: structure is used by the kernel internally to represent files + * @filp: device file descriptor + * + * This function deletes structues associated with this file, deletes + * queues, flushes and destroys workqueus and closes this file. + * It also unregisters itself from l2mux driver. + */ +static int isa_close(struct inode *inode, struct file *filp) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct isa_driver_context *isa_context = shrm->isa_context; + u8 m; + int idx; + + mutex_lock(&isa_lock); + m = iminor(filp->f_path.dentry->d_inode); + idx = shrm_get_cdev_index(m); + if (idx < 0) { + dev_err(shrm->dev, "failed to get index\n"); + return idx; + } + dev_dbg(shrm->dev, "isa_close %d", m); + + if (atomic_dec_and_test(&isa_context->is_open[idx])) { + atomic_inc(&isa_context->is_open[idx]); + dev_err(shrm->dev, "Device not opened yet\n"); + mutex_unlock(&isa_lock); + return -ENODEV; + } + atomic_set(&isa_context->is_open[idx], 1); + + switch (m) { + case RPC_MESSAGING: + dev_info(shrm->dev, "Close RPC_MESSAGING Device\n"); + break; + case AUDIO_MESSAGING: + dev_info(shrm->dev, "Close AUDIO_MESSAGING Device\n"); + break; + case SECURITY_MESSAGING: + dev_info(shrm->dev, "CLose SECURITY_MESSAGING Device\n"); + break; + case COMMON_LOOPBACK_MESSAGING: + kfree(isadev->addr); + dev_info(shrm->dev, "Close COMMON_LOOPBACK_MESSAGING Device\n"); + break; + case AUDIO_LOOPBACK_MESSAGING: + kfree(isadev->addr); + dev_info(shrm->dev, "Close AUDIO_LOOPBACK_MESSAGING Device\n"); + break; + default: + dev_info(shrm->dev, "No such device present\n"); + mutex_unlock(&isa_lock); + return -ENODEV; + }; + mutex_unlock(&isa_lock); + return 0; +} +/** + * isa_open() - Open device file + * @inode: structure is used by the kernel internally to represent files + * @filp: device file descriptor + * + * This function performs initialization tasks needed to open SHM channel. + * Following tasks are performed. + * -return if device is already opened + * -create uplink FIFO + * -create downlink FIFO + * -init delayed workqueue thread + * -register to l2mux driver + */ +static int isa_open(struct inode *inode, struct file *filp) +{ + int err = 0; + u8 m; + int idx; + struct isadev_context *isadev; + struct isa_driver_context *isa_context = container_of( + inode->i_cdev, + struct isa_driver_context, + cdev); + struct shrm_dev *shrm = isa_context->isadev->dl_queue.shrm; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (get_boot_state() != BOOT_DONE) { + dev_err(shrm->dev, "Boot is not done\n"); + return -EBUSY; + } + mutex_lock(&isa_lock); + m = iminor(inode); + + if ((m != RPC_MESSAGING) && + (m != AUDIO_LOOPBACK_MESSAGING) && + (m != COMMON_LOOPBACK_MESSAGING) && + (m != AUDIO_MESSAGING) && + (m != SECURITY_MESSAGING)) { + dev_err(shrm->dev, "No such device present\n"); + mutex_unlock(&isa_lock); + return -ENODEV; + } + idx = shrm_get_cdev_index(m); + if (idx < 0) { + dev_err(shrm->dev, "failed to get index\n"); + return idx; + } + if (!atomic_dec_and_test(&isa_context->is_open[idx])) { + atomic_inc(&isa_context->is_open[idx]); + dev_err(shrm->dev, "Device already opened\n"); + mutex_unlock(&isa_lock); + return -EBUSY; + } + isadev = &isa_context->isadev[idx]; + if (filp != NULL) + filp->private_data = isadev; + + switch (m) { + case RPC_MESSAGING: + dev_info(shrm->dev, "Open RPC_MESSAGING Device\n"); + break; + case AUDIO_MESSAGING: + dev_info(shrm->dev, "Open AUDIO_MESSAGING Device\n"); + break; + case SECURITY_MESSAGING: + dev_info(shrm->dev, "Open SECURITY_MESSAGING Device\n"); + break; + case COMMON_LOOPBACK_MESSAGING: + isadev->addr = kzalloc(10 * 1024, GFP_KERNEL); + if (!isadev->addr) { + mutex_unlock(&isa_lock); + return -ENOMEM; + } + dev_info(shrm->dev, "Open COMMON_LOOPBACK_MESSAGING Device\n"); + break; + case AUDIO_LOOPBACK_MESSAGING: + isadev->addr = kzalloc(10 * 1024, GFP_KERNEL); + if (!isadev->addr) { + mutex_unlock(&isa_lock); + return -ENOMEM; + } + dev_info(shrm->dev, "Open AUDIO_LOOPBACK_MESSAGING Device\n"); + break; + }; + + mutex_unlock(&isa_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return err; +} + +const struct file_operations isa_fops = { + .owner = THIS_MODULE, + .open = isa_open, + .release = isa_close, + .ioctl = isa_ioctl, + .mmap = isa_mmap, + .read = isa_read, + .write = isa_write, + .poll = isa_select, +}; + +/** + * isa_init() - module insertion function + * @shrm: pointer to the shrm device information structure + * + * This function registers module as a character driver using + * register_chrdev_region() or alloc_chrdev_region. It adds this + * driver to system using cdev_add() call. Major number is dynamically + * allocated using alloc_chrdev_region() by default or left to user to specify + * it during load time. For this variable major is used as module_param + * Nodes to be created using + * mknod /dev/isi c $major 0 + * mknod /dev/rpc c $major 1 + * mknod /dev/audio c $major 2 + * mknod /dev/sec c $major 3 + */ +int isa_init(struct shrm_dev *shrm) +{ + dev_t dev_id; + int retval, no_dev; + struct isadev_context *isadev; + struct isa_driver_context *isa_context; + + isa_context = kzalloc(sizeof(struct isa_driver_context), + GFP_KERNEL); + if (isa_context == NULL) { + dev_err(shrm->dev, "Failed to alloc memory\n"); + return -ENOMEM; + } + shrm->isa_context = isa_context; + if (major) { + dev_id = MKDEV(major, MAX_L2_HEADERS); + retval = register_chrdev_region(dev_id, ISA_DEVICES, NAME); + } else { + /* + * L2 header of loopback device is 192(0xc0). As per the shrm + * protocol the minor id of the deivce is mapped to the + * L2 header. + */ + retval = alloc_chrdev_region(&dev_id, 0, MAX_L2_HEADERS, NAME); + major = MAJOR(dev_id); + } + dev_dbg(shrm->dev, " major %d\n", major); + + cdev_init(&isa_context->cdev, &isa_fops); + isa_context->cdev.owner = THIS_MODULE; + retval = cdev_add(&isa_context->cdev, dev_id, MAX_L2_HEADERS); + if (retval) { + dev_err(shrm->dev, "Failed to add char device\n"); + return retval; + } + /* create class and device */ + isa_context->shm_class = class_create(THIS_MODULE, NAME); + if (IS_ERR(isa_context->shm_class)) { + dev_err(shrm->dev, "Error creating shrm class\n"); + cdev_del(&isa_context->cdev); + retval = PTR_ERR(isa_context->shm_class); + kfree(isa_context); + return retval; + } + + for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) { + atomic_set(&isa_context->is_open[no_dev], 1); + device_create(isa_context->shm_class, NULL, + MKDEV(MAJOR(dev_id), + map_dev[no_dev].l2_header), NULL, + map_dev[no_dev].name); + } + + isa_context->isadev = kzalloc(sizeof + (struct isadev_context)*ISA_DEVICES, + GFP_KERNEL); + if (isa_context->isadev == NULL) { + dev_err(shrm->dev, "Failed to alloc memory\n"); + return -ENOMEM; + } + for (no_dev = 0 ; no_dev < ISA_DEVICES ; no_dev++) { + isadev = &isa_context->isadev[no_dev]; + isadev->device_id = no_dev; + retval = create_queue(&isadev->dl_queue, + isadev->device_id, shrm); + + if (retval < 0) { + dev_err(shrm->dev, "create dl_queue failed\n"); + delete_queue(&isadev->dl_queue); + kfree(isadev); + return retval; + } + } + mutex_init(&isa_context->tx_audio_mutex); + spin_lock_init(&isa_context->common_tx); + dev_dbg(shrm->dev, " SHM Char Driver added\n"); + return retval; +} + +void isa_exit(struct shrm_dev *shrm) +{ + int no_dev; + struct isadev_context *isadev; + struct isa_driver_context *isa_context = shrm->isa_context; + dev_t dev_id = MKDEV(major, 0); + + for (no_dev = 0 ; no_dev < ISA_DEVICES ; no_dev++) { + device_destroy(isa_context->shm_class, + MKDEV(MAJOR(dev_id), + map_dev[no_dev].l2_header)); + isadev = &isa_context->isadev[no_dev]; + delete_queue(&isadev->dl_queue); + kfree(isadev); + } + class_destroy(isa_context->shm_class); + cdev_del(&isa_context->cdev); + unregister_chrdev_region(dev_id, ISA_DEVICES); + kfree(isa_context); + dev_dbg(shrm->dev, " SHM Char Driver removed\n"); +} diff --git a/drivers/misc/shrm/Kconfig b/drivers/misc/shrm/Kconfig new file mode 100644 index 00000000000..fffee1c703e --- /dev/null +++ b/drivers/misc/shrm/Kconfig @@ -0,0 +1,49 @@ +# +# SHM HW kernel configuration +# +config U8500_SHRM + tristate "U8500 SHRM hardware driver" + depends on ARCH_U8500 && PHONET + default Y + ---help--- + If you say Y here, you will enable the STN8500 SHM hardware driver. + + If unsure, say N. +choice + prompt "Modem Image Version" + depends on U8500_SHRM + default SHRM_V1_UPDATES_VERSION + + config SHRM_ED_V1_VERSION + depends on U8500_SHRM + bool "SHRM ED / V1 " + help + Modem Images with ED/V1 updates + + config SHRM_V1_UPDATES_VERSION + depends on U8500_SHRM + bool "SHRM V1 UPDATES" + help + Modem Images with V1 Updates + +endchoice + +config U8500_SHRM_LOOP_BACK + tristate "U8500 SHRM loopback" + depends on U8500_SHRM + default n + ---help--- + If you say Y here, you will enable the shm loopback + + If unsure, say N. + +config U8500_SHRM_MODEM_SILENT_RESET + bool "U8500 SHRM Modem Silent Reset" + depends on U8500_SHRM + default n + ---help--- + If you say Y here, you will enable the modem silent reset feature + + If unsure, say N. + + diff --git a/drivers/misc/shrm/Makefile b/drivers/misc/shrm/Makefile new file mode 100644 index 00000000000..8115c24920b --- /dev/null +++ b/drivers/misc/shrm/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for SHRM drivers +# + +ifdef CONFIG_PHONET +u8500_shrm-objs := modem_shrm_driver.o shrm_fifo.o shrm_protocol.o +else +u8500_shrm-objs := shrm_driver.o shrm_fifo.o shrm_protocol.o +endif + +obj-$(CONFIG_U8500_SHRM) += u8500_shrm.o diff --git a/drivers/misc/shrm/modem_shrm_driver.c b/drivers/misc/shrm/modem_shrm_driver.c new file mode 100644 index 00000000000..d94c007098b --- /dev/null +++ b/drivers/misc/shrm/modem_shrm_driver.c @@ -0,0 +1,667 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghvi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include +#ifdef CONFIG_HIGH_RES_TIMERS +#include +static struct hrtimer timer; +#endif +#include +#include +#include + +/* debug functionality */ +#define ISA_DEBUG 0 + +#define PHONET_TASKLET +#define MAX_RCV_LEN 2048 +static u8 ph_recv_buf[MAX_RCV_LEN]; + +void do_phonet_rcv_tasklet(unsigned long unused); +struct tasklet_struct phonet_rcv_tasklet; + +/** + * audio_receive() - Receive audio channel completion callback + * @shrm: pointer to shrm device information structure + * @data: message pointer + * @n_bytes: message size + * @l2_header: L2 header/device ID 2->audio, 5->audio_loopback + * + * This fucntion is called from the audio receive handler. Copies the audio + * message from the FIFO to the AUDIO queue. The message is later copied from + * this queue to the user buffer through the char or net interface read + * operation. + */ +static int audio_receive(struct shrm_dev *shrm, void *data, + u32 n_bytes, u8 l2_header) +{ + u32 size = 0; + int ret = 0; + int idx; + u8 *psrc; + struct message_queue *q; + struct isadev_context *audiodev; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + idx = shrm_get_cdev_index(l2_header); + if (idx < 0) { + dev_err(shrm->dev, "failed to get index\n"); + return idx; + } + audiodev = &shrm->isa_context->isadev[idx]; + q = &audiodev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + spin_unlock(&q->update_lock); + if (ret < 0) + dev_err(shrm->dev, "Adding a msg to message queue failed"); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * common_receive() - Receive common channel completion callback + * @shrm: pointer to the shrm device information structure + * @data: message pointer + * @n_bytes: message size + * @l2_header: L2 header / device ID + * + * This function is called from the receive handler to copy the respective + * ISI, RPC, SECURITY message to its respective queue. The message is then + * copied from queue to the user buffer on char net interface read operation. + */ +static int common_receive(struct shrm_dev *shrm, void *data, + u32 n_bytes, u8 l2_header) +{ + u32 size = 0; + int ret = 0; + int idx; + u8 *psrc; + struct message_queue *q; + struct isadev_context *isa_dev; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + idx = shrm_get_cdev_index(l2_header); + if (idx < 0) { + dev_err(shrm->dev, "failed to get index\n"); + return idx; + } + isa_dev = &shrm->isa_context->isadev[idx]; + q = &isa_dev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + dev_dbg(shrm->dev, "Inside Loop Back\n"); + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + spin_unlock(&q->update_lock); + if (ret < 0) { + dev_err(shrm->dev, "Adding a msg to message queue failed"); + return ret; + } + + + if (l2_header == ISI_MESSAGING) { + if (shrm->netdev_flag_up) { + dev_dbg(shrm->dev, + "scheduling the phonet tasklet from %s!\n", + __func__); + tasklet_schedule(&phonet_rcv_tasklet); + } + dev_dbg(shrm->dev, + "Out of phonet tasklet %s!!!\n", __func__); + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * rx_common_l2msg_handler() - common channel receive handler + * @l2_header: L2 header + * @msg: pointer to the receive buffer + * @length: length of the msg to read + * @shrm: pointer to shrm device information structure + * + * This function is called to receive the message from CaMsgPendingNotification + * interrupt handler. + */ +static void rx_common_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; + dev_dbg(shrm->dev, "%s IN\n", __func__); + + ret = common_receive(shrm, msg, length, l2_header); + if (ret < 0) + dev_err(shrm->dev, + "common receive with l2 header %d failed\n", l2_header); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +/** + * rx_audio_l2msg_handler() - audio channel receive handler + * @l2_header: L2 header + * @msg: pointer to the receive buffer + * @length: length of the msg to read + * @shrm: pointer to shrm device information structure + * + * This function is called to receive the message from CaMsgPendingNotification + * interrupt handler. + */ +static void rx_audio_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + ret = audio_receive(shrm, msg, length, l2_header); + if (ret < 0) + dev_err(shrm->dev, "audio receive failed\n"); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static int __init shm_initialise_irq(struct shrm_dev *shrm) +{ + int err = 0; + + err = shrm_protocol_init(shrm, + rx_common_l2msg_handler, rx_audio_l2msg_handler); + if (err < 0) { + dev_err(shrm->dev, "SHM Protocol Init Failure\n"); + return err; + } + + err = request_irq(shrm->ca_wake_irq, + ca_wake_irq_handler, IRQF_TRIGGER_RISING, + "ca_wake-up", shrm); + if (err < 0) { + dev_err(shrm->dev, + "Unable to allocate shm tx interrupt line\n"); + free_irq(shrm->ca_wake_irq, shrm); + return err; + } + + err = request_irq(shrm->ac_read_notif_0_irq, + ac_read_notif_0_irq_handler, 0, + "ac_read_notif_0", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_0_irq interrupt line\n"); + goto irq_err1; + } + + err = request_irq(shrm->ac_read_notif_1_irq, + ac_read_notif_1_irq_handler, 0, + "ac_read_notif_1", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_1_irq interrupt line\n"); + goto irq_err2; + } + + err = request_irq(shrm->ca_msg_pending_notif_0_irq, + ca_msg_pending_notif_0_irq_handler, 0, + "ca_msg_pending_notif_0", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_0_irq line\n"); + goto irq_err3; + } + + err = request_irq(shrm->ca_msg_pending_notif_1_irq, + ca_msg_pending_notif_1_irq_handler, 0, + "ca_msg_pending_notif_1", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_1_irq interrupt line\n"); + goto irq_err4; + } + return err; +irq_err4: + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); +irq_err3: + free_irq(shrm->ac_read_notif_1_irq, shrm); +irq_err2: + free_irq(shrm->ac_read_notif_0_irq, shrm); +irq_err1: + free_irq(shrm->ca_wake_irq, shrm); + return err; +} + +static void free_shm_irq(struct shrm_dev *shrm) +{ + free_irq(shrm->ca_wake_irq, shrm); + free_irq(shrm->ac_read_notif_0_irq, shrm); + free_irq(shrm->ac_read_notif_1_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_1_irq, shrm); +} + + + +#ifdef CONFIG_HIGH_RES_TIMERS +static enum hrtimer_restart callback(struct hrtimer *timer) +{ + return HRTIMER_NORESTART; +} +#endif + +void do_phonet_rcv_tasklet(unsigned long unused) +{ + ssize_t ret; + struct shrm_dev *shrm = (struct shrm_dev *)unused; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + for (;;) { + ret = shrm_net_receive(shrm->ndev, ph_recv_buf); + if (ret == 0) { + dev_dbg(shrm->dev, "len is zero, queue empty\n"); + break; + } + if (ret < 0) { + dev_err(shrm->dev, "len < 0 !!! error!!!\n"); + break; + } + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static int shrm_probe(struct platform_device *pdev) +{ + int err = 0; + struct resource *res; + struct shrm_dev *shrm = NULL; + + shrm = kzalloc(sizeof(struct shrm_dev), GFP_KERNEL); + if (shrm == NULL) { + dev_err(&pdev->dev, + "Could not allocate memory for struct shm_dev\n"); + return -ENOMEM; + } + + shrm->dev = &pdev->dev; + /* initialise the SHM */ + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(shrm->dev, + "Unable to map Ca Wake up interrupt\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_wake_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); + + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_common IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_0_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); + + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_1_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 3); + + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_common IRQbase\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_0_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 4); + + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_1_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + if (!res) { + dev_err(shrm->dev, + "Could not get SHM IO memory information\n"); + err = -ENODEV; + goto rollback_intr; + } + shrm->intr_base = (void __iomem *)ioremap_nocache(res->start, + res->end - res->start + 1); + if (!(shrm->intr_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ape_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_COMMON_BASE; + shrm->ape_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_APE_COMMON_BASE, + SHM_FIFO_0_SIZE); + shrm->ape_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->ape_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_common_fifo_base; + } + shrm->cmt_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_COMMON_BASE; + shrm->cmt_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_CMT_COMMON_BASE, SHM_FIFO_0_SIZE); + shrm->cmt_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->cmt_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_common_fifo_base; + } + shrm->ape_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_AUDIO_BASE; + shrm->ape_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_APE_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->ape_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->ape_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_audio_fifo_base; + } + shrm->cmt_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_AUDIO_BASE; + shrm->cmt_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_CMT_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->cmt_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->cmt_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_audio_fifo_base; + } + shrm->ac_common_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ac_common_shared_wptr; + } + shrm->ac_common_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_common_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_common_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ac_audio_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ac_audio_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_audio_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_audio_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + if (isa_init(shrm) != 0) { + dev_err(shrm->dev, "Driver Initialization Error\n"); + err = -EBUSY; + } + /* install handlers and tasklets */ + if (shm_initialise_irq(shrm)) { + dev_err(shrm->dev, + "shm error in interrupt registration\n"); + goto rollback_irq; + } +#ifdef CONFIG_HIGH_RES_TIMERS + hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer.function = callback; + hrtimer_start(&timer, ktime_set(0, 2*NSEC_PER_MSEC), HRTIMER_MODE_REL); +#endif + err = shrm_register_netdev(shrm); + if (err < 0) + goto rollback_irq; + + tasklet_init(&phonet_rcv_tasklet, do_phonet_rcv_tasklet, 0); + phonet_rcv_tasklet.data = (unsigned long)shrm; + + platform_set_drvdata(pdev, shrm); + + return err; +rollback_irq: + free_shm_irq(shrm); +rollback_map: + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); +rollback_ac_common_shared_wptr: + iounmap(shrm->cmt_audio_fifo_base); +rollback_cmt_audio_fifo_base: + iounmap(shrm->ape_audio_fifo_base); +rollback_ape_audio_fifo_base: + iounmap(shrm->cmt_common_fifo_base); +rollback_cmt_common_fifo_base: + iounmap(shrm->ape_common_fifo_base); +rollback_ape_common_fifo_base: + iounmap(shrm->intr_base); +rollback_intr: + kfree(shrm); + return err; +} + +static int __exit shrm_remove(struct platform_device *pdev) +{ + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + free_shm_irq(shrm); + iounmap(shrm->intr_base); + iounmap(shrm->ape_common_fifo_base); + iounmap(shrm->cmt_common_fifo_base); + iounmap(shrm->ape_audio_fifo_base); + iounmap(shrm->cmt_audio_fifo_base); + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); + shrm_unregister_netdev(shrm); + isa_exit(shrm); + kfree(shrm); + + return 0; +} + +#ifdef CONFIG_PM +/** + * u8500_shrm_suspend() - This routine puts the SHRM in to sustend state. + * @dev: pointer to device structure. + * + * This routine checks the current ongoing communication with Modem by + * examining the ca_wake state and prevents suspend if modem communication + * is on-going. + * If ca_wake = 1 (high), modem comm. is on-going; don't suspend + * If ca_wake = 0 (low), no comm. with modem on-going.Allow suspend + */ +int u8500_shrm_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + int err; + + dev_dbg(&pdev->dev, "%s called...\n", __func__); + dev_dbg(&pdev->dev, "ca_wake_req_state = %x\n", + get_ca_wake_req_state()); + + /* if ca_wake_req is high, prevent system suspend */ + if (!get_ca_wake_req_state()) { + err = shrm_suspend_netdev(shrm->ndev); + return err; + } else + return -EBUSY; +} + +/** + * u8500_shrm_resume() - This routine resumes the SHRM from suspend state. + * @dev: pointer to device structure + * + * This routine restore back the current state of the SHRM + */ +int u8500_shrm_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + int err; + + dev_dbg(&pdev->dev, "%s called...\n", __func__); + err = shrm_resume_netdev(shrm->ndev); + + return err; +} + +static const struct dev_pm_ops shrm_dev_pm_ops = { + .suspend_noirq = u8500_shrm_suspend, + .resume_noirq = u8500_shrm_resume, +}; +#endif + +static struct platform_driver shrm_driver = { + .remove = __exit_p(shrm_remove), + .driver = { + .name = "u8500_shrm", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &shrm_dev_pm_ops, +#endif + }, +}; + +static int __init shrm_driver_init(void) +{ + return platform_driver_probe(&shrm_driver, shrm_probe); +} + +static void __exit shrm_driver_exit(void) +{ + platform_driver_unregister(&shrm_driver); +} + +module_init(shrm_driver_init); +module_exit(shrm_driver_exit); + +MODULE_AUTHOR("Biju Das, Kumar Sanghvi, Arun Murthy"); +MODULE_DESCRIPTION("Shared Memory Modem Driver Interface"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/shrm/shrm_driver.c b/drivers/misc/shrm/shrm_driver.c new file mode 100644 index 00000000000..6277794608a --- /dev/null +++ b/drivers/misc/shrm/shrm_driver.c @@ -0,0 +1,1439 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghvi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#define DEBUG + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + + +#ifdef CONFIG_HIGH_RES_TIMERS +#include +static struct hrtimer timer; +#endif + + +#define NAME "IPC_ISA" +#define ISA_DEVICES 4 +/**debug functionality*/ +#define ISA_DEBUG 0 + +#define ISI_MESSAGING (0) +#define RPC_MESSAGING (1) +#define AUDIO_MESSAGING (2) +#define SECURITY_MESSAGING (3) + +#define SIZE_OF_FIFO (512*1024) + +static u8 message_fifo[4][SIZE_OF_FIFO]; + +static u8 wr_isi_msg[10*1024]; +static u8 wr_rpc_msg[10*1024]; +static u8 wr_sec_msg[10*1024]; +static u8 wr_audio_msg[10*1024]; + +/* global data */ +/* + * int major:This variable is exported to user as module_param to specify + * major number at load time + */ +static int major; +module_param(major, int, 0); +MODULE_PARM_DESC(major, "Major device number"); +/* global fops mutex */ +static DEFINE_MUTEX(isa_lock); +rx_cb common_rx; +rx_cb audio_rx; + + +static int isi_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); +static int rpc_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); +static int audio_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); +static int security_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes); + +static void rx_common_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + u8 *pdata; +#endif + dev_dbg(shrm->dev, "%s IN\n", __func__); + + switch (l2_header) { + case ISI_MESSAGING: + ret = isi_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "isi receive failed\n"); + break; + case RPC_MESSAGING: + ret = rpc_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "rpc receive failed\n"); + break; + case SECURITY_MESSAGING: + ret = security_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, + "security receive failed\n"); + break; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + case COMMMON_LOOPBACK_MESSAGING: + pdata = (u8 *)msg; + if ((*pdata == 0x50) || (*pdata == 0xAF)) { + ret = isi_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "isi receive failed\n"); + } else if ((*pdata == 0x0A) || (*pdata == 0xF5)) { + ret = rpc_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "rpc receive failed\n"); + } else if ((*pdata == 0xFF) || (*pdata == 0x00)) { + ret = security_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, + "security receive failed\n"); + } + break; +#endif + default: + break; + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static void rx_audio_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + audio_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "audio receive failed\n"); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static int __init shm_initialise_irq(struct shrm_dev *shrm) +{ + int err = 0; + + shrm_protocol_init(shrm, + rx_common_l2msg_handler, rx_audio_l2msg_handler); + + err = request_irq(shrm->ca_wake_irq, + ca_wake_irq_handler, IRQF_TRIGGER_RISING, + "ca_wake-up", shrm); + if (err < 0) { + dev_err(shrm->dev, + "Unable to allocate shm tx interrupt line\n"); + return err; + } + + err = request_irq(shrm->ac_read_notif_0_irq, + ac_read_notif_0_irq_handler, 0, + "ac_read_notif_0", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_0_irq interrupt line\n"); + goto irq_err1; + } + + err = request_irq(shrm->ac_read_notif_1_irq, + ac_read_notif_1_irq_handler, 0, + "ac_read_notif_1", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_1_irq interrupt line\n"); + goto irq_err2; + } + + err = request_irq(shrm->ca_msg_pending_notif_0_irq, + ca_msg_pending_notif_0_irq_handler, 0, + "ca_msg_pending_notif_0", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_0_irq line\n"); + goto irq_err3; + } + + err = request_irq(shrm->ca_msg_pending_notif_1_irq, + ca_msg_pending_notif_1_irq_handler, 0, + "ca_msg_pending_notif_1", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_1_irq interrupt line\n"); + goto irq_err4; + } + + return err; + +irq_err4: + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); +irq_err3: + free_irq(shrm->ac_read_notif_1_irq, shrm); +irq_err2: + free_irq(shrm->ac_read_notif_0_irq, shrm); +irq_err1: + free_irq(shrm->ca_wake_irq, shrm); + return err; +} + +static void free_shm_irq(struct shrm_dev *shrm) +{ + free_irq(shrm->ca_wake_irq, shrm); + free_irq(shrm->ac_read_notif_0_irq, shrm); + free_irq(shrm->ac_read_notif_1_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_1_irq, shrm); +} + +/** + * create_queue() - To create FIFO for Tx and Rx message buffering. + * @q: message queue. + * @devicetype: device type 0-isi,1-rpc,2-audio,3-security. + * + * This function creates a FIFO buffer of n_bytes size using + * dma_alloc_coherent(). It also initializes all queue handling + * locks, queue management pointers. It also initializes message list + * which occupies this queue. + * + * It return -ENOMEM in case of no memory. + */ +static int create_queue(struct message_queue *q, u32 devicetype, + struct shrm_dev *shrm) +{ + q->fifo_base = (u8 *)&message_fifo[devicetype]; + q->size = SIZE_OF_FIFO; + q->readptr = 0; + q->writeptr = 0; + q->no = 0; + q->shrm = shrm; + spin_lock_init(&q->update_lock); + INIT_LIST_HEAD(&q->msg_list); + init_waitqueue_head(&q->wq_readable); + atomic_set(&q->q_rp, 0); + + return 0; +} +/** + * delete_queue() - To delete FIFO and assiciated memory. + * @q: message queue + * + * This function deletes FIFO created using create_queue() function. + * It resets queue management pointers. + */ +static void delete_queue(struct message_queue *q) +{ + q->size = 0; + q->readptr = 0; + q->writeptr = 0; +} + +/** + * add_msg_to_queue() - Add a message inside inside queue + * + * @q: message queue + * @size: size in bytes + * + * This function tries to allocate n_bytes of size in FIFO q. + * It returns negative number when no memory can be allocated + * currently. + */ +int add_msg_to_queue(struct message_queue *q, u32 size) +{ + struct queue_element *new_msg = NULL; + struct shrm_dev *shrm = q->shrm; + + dev_dbg(shrm->dev, "%s IN q->writeptr=%d\n", + __func__, q->writeptr); + new_msg = kmalloc(sizeof(struct queue_element), + GFP_KERNEL|GFP_ATOMIC); + + if (new_msg == NULL) { + dev_err(shrm->dev, "memory overflow inside while(1)\n"); + return -ENOMEM; + } + new_msg->offset = q->writeptr; + new_msg->size = size; + new_msg->no = q->no++; + + /* check for overflow condition */ + if (q->readptr <= q->writeptr) { + if (((q->writeptr-q->readptr) + size) >= q->size) { + dev_err(shrm->dev, "Buffer overflow !!\n"); + BUG_ON(((q->writeptr-q->readptr) + size) >= q->size); + } + } else { + if ((q->writeptr + size) >= q->readptr) { + dev_err(shrm->dev, "Buffer overflow !!\n"); + BUG_ON((q->writeptr + size) >= q->readptr); + } + } + q->writeptr = (q->writeptr + size) % q->size; + if (list_empty(&q->msg_list)) { + list_add_tail(&new_msg->entry, &q->msg_list); + /* There can be 2 blocking calls read and another select */ + + atomic_set(&q->q_rp, 1); + wake_up_interruptible(&q->wq_readable); + } else + list_add_tail(&new_msg->entry, &q->msg_list); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; +} + +/** + * remove_msg_from_queue() - To remove a message from the msg queue. + * + * @q: message queue + * + * This function delets a message from the message list associated with message + * queue q and also updates read ptr. + * If the message list is empty, then, event is set to block the select and + * read calls of the paricular queue. + * + * The message list is FIFO style and message is always added to tail and + * removed from head. + */ + +int remove_msg_from_queue(struct message_queue *q) +{ + struct queue_element *old_msg = NULL; + struct shrm_dev *shrm = q->shrm; + struct list_head *msg; + + dev_dbg(shrm->dev, "%s IN q->readptr %d\n", + __func__, q->readptr); + + list_for_each(msg, &q->msg_list) { + old_msg = list_entry(msg, struct queue_element, entry); + if (old_msg == NULL) { + dev_err(shrm->dev, ":no message found\n"); + return -EFAULT; + } + break; + } + list_del(msg); + q->readptr = (q->readptr + old_msg->size) % q->size; + if (list_empty(&q->msg_list)) { + dev_dbg(shrm->dev, "List is empty setting RP= 0\n"); + atomic_set(&q->q_rp, 0); + } + kfree(old_msg); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; +} + +/** + * get_size_of_new_msg() - retrieve new message from message list + * + * @q: message queue + * + * This function will retrieve most recent message from the corresponding + * queue list. New message is always retrieved from head side. + * It returns new message no, offset if FIFO and size. + */ +int get_size_of_new_msg(struct message_queue *q) +{ + struct queue_element *new_msg = NULL; + struct list_head *msg_list; + struct shrm_dev *shrm = q->shrm; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + spin_lock_bh(&q->update_lock); + list_for_each(msg_list, &q->msg_list) { + new_msg = list_entry(msg_list, struct queue_element, entry); + if (new_msg == NULL) { + spin_unlock_bh(&q->update_lock); + dev_err(shrm->dev, "no message found\n"); + return -1; + } + break; + } + spin_unlock_bh(&q->update_lock); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return new_msg->size; +} + +/** + * isi_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes:message size + * + * This function is a callback to indicate ISI message reception is complete. + * It updates Writeptr of the Fifo + */ +static int isi_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *isidev = &shrm->isa_context->isadev[0]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &isidev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + dev_dbg(shrm->dev, "Inside Loop Back\n"); + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * rpc_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes:message size + * + * This function is a callback to indicate RPC message reception is complete. + * It updates Writeptr of the Fifo + */ +static int rpc_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *rpcdev = &shrm->isa_context->isadev[1]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &rpcdev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * audio_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes:message size + * + * This function is a callback to indicate audio message reception is complete. + * It updates Writeptr of the Fifo + */ +static int audio_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *audiodev = &shrm->isa_context->isadev[2]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &audiodev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * security_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes: message size + * + * This function is a callback to indicate security message reception + * is complete.It updates Writeptr of the Fifo + */ +static int security_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *secdev = &shrm->isa_context->isadev[3]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &secdev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + + +/** + * isa_select() - Select Interface + * + * @filp:file descriptor pointer + * @wait:poll_table_struct pointer + * + * This function is used to perform non-blocking read operations. It allows + * a process to determine whether it can read from one or more open files + * without blocking. These calls can also block a process until any of a + * given set of file descriptors becomes available for reading. + * If a file is ready to read, POLLIN | POLLRDNORM bitmask is returned. + * The driver method is called whenever the user-space program performs a select + * system call involving a file descriptor associated with the driver. + */ +static u32 isa_select(struct file *filp, + struct poll_table_struct *wait) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + u32 mask = 0; + u32 m = iminor(filp->f_path.dentry->d_inode); + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (isadev->device_id != m) + return -1; + q = &isadev->dl_queue; + poll_wait(filp, &q->wq_readable, wait); + if (atomic_read(&q->q_rp) == 1) + mask = POLLIN | POLLRDNORM; + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return mask; +} + +/** + * isa_read() - Read from device + * + * @filp:file descriptor + * @buf:user buffer pointer + * @len:size of requested data transfer + * @ppos:not used + * + * This function is called whenever user calls read() system call. + * It reads a oldest message from queue and copies it into user buffer and + * returns its size. + * If there is no message present in queue, then it blocks until new data is + * available. + */ +ssize_t isa_read(struct file *filp, char __user *buf, + size_t len, loff_t *ppos) +{ + struct isadev_context *isadev = (struct isadev_context *) + filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + char *psrc; + u32 msgsize; + u32 size = 0; + int ret = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (len <= 0) + return -EFAULT; + q = &isadev->dl_queue; + + spin_lock_bh(&q->update_lock); + if (list_empty(&q->msg_list)) { + spin_unlock_bh(&q->update_lock); + if (wait_event_interruptible(q->wq_readable, + atomic_read(&q->q_rp) == 1)) { + return -ERESTARTSYS; + } + } else + spin_unlock_bh(&q->update_lock); + + msgsize = get_size_of_new_msg(q); + if ((q->readptr+msgsize) >= q->size) { + dev_dbg(shrm->dev, "Inside Loop Back\n"); + psrc = (char *)buf; + size = (q->size-q->readptr); + /* Copy First Part of msg */ + if (copy_to_user(psrc, + (u8 *)(q->fifo_base+q->readptr), + size)) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + if (copy_to_user(psrc, + (u8 *)(q->fifo_base), + (msgsize-size))) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + } else { + if (copy_to_user(buf, + (u8 *)(q->fifo_base+q->readptr), + msgsize)) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + } + + spin_lock_bh(&q->update_lock); + ret = remove_msg_from_queue(q); + if (ret < 0) { + dev_err(shrm->dev, + "Removing msg from message queue failed\n"); + msgsize = ret; + } + spin_unlock_bh(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return msgsize; +} +/** + * isa_write() - Write to device + * + * @filp:file descriptor + * @buf:user buffer pointer + * @len:size of requested data transfer + * @ppos:not used + * + * This function is called whenever user calls write() system call. + * It checks if there is space available in queue, and copies the message + * inside queue. If there is no space, it blocks until space becomes available. + * It also schedules transfer thread to transmit the newly added message. + */ +static ssize_t isa_write(struct file *filp, const char __user *buf, + size_t len, loff_t *ppos) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + int err, ret; + void *addr = 0; + u8 l2_header = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + if (len <= 0) + return -EFAULT; + q = &isadev->dl_queue; + + switch (isadev->device_id) { + case ISI_MESSAGING: + dev_dbg(shrm->dev, "ISI\n"); + addr = (void *)wr_isi_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + dev_dbg(shrm->dev, "Loopback\n"); + l2_header = COMMON_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + break; + case RPC_MESSAGING: + dev_dbg(shrm->dev, "RPC\n"); + addr = (void *)wr_rpc_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + l2_header = COMMON_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + break; + case AUDIO_MESSAGING: + dev_dbg(shrm->dev, "Audio\n"); + addr = (void *)wr_audio_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + l2_header = AUDIO_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + + break; + case SECURITY_MESSAGING: + dev_dbg(shrm->dev, "Security\n"); + addr = (void *)wr_sec_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + l2_header = COMMON_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + break; + default: + dev_dbg(shrm->dev, "Wrong device\n"); + return -EFAULT; + } + + if (copy_from_user(addr, buf, len)) { + dev_err(shrm->dev, "copy_from_user failed\n"); + return -EFAULT; + } + + /* Write msg to Fifo */ + if (isadev->device_id == 2) { + mutex_lock(&shrm->isa_context->tx_audio_mutex); + err = shm_write_msg(shrm, l2_header, addr, len); + if (!err) + ret = len; + else + ret = err; + mutex_unlock(&shrm->isa_context->tx_audio_mutex); + } else { + spin_lock_bh(&shrm->isa_context->common_tx); + err = shm_write_msg(shrm, l2_header, addr, len); + if (!err) + ret = len; + else + ret = err; + spin_unlock_bh(&shrm->isa_context->common_tx); + } + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * isa_ioctl() - To handle different ioctl commands supported by driver. + * + * @inode: structure is used by the kernel internally to represent files + * @filp:file descriptor pointer + * @cmd:ioctl command + * @arg:input param + * + * Following ioctls are supported by this driver. + * DLP_IOCTL_ALLOCATE_BUFFER - To allocate buffer for new uplink message. + * This ioctl is called with required message size. It returns offset for + * the allocates space in the queue. DLP_IOCTL_PUT_MESSAGE - To indicate + * new uplink message available in queuq for transmission. Message is copied + * from offset location returned by previous ioctl before calling this ioctl. + * DLP_IOCTL_GET_MESSAGE - To check if any downlink message is available in + * queue. It returns offset for new message inside queue. + * DLP_IOCTL_DEALLOCATE_BUFFER - To deallocate any buffer allocate for + * downlink message once the message is copied. Message is copied from offset + * location returned by previous ioctl before calling this ioctl. + */ +static int isa_ioctl(struct inode *inode, struct file *filp, + unsigned cmd, unsigned long arg) +{ + int err = 0; + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + u32 m = iminor(inode); + + if (isadev->device_id != m) + return -1; + + switch (cmd) { + case DLP_IOC_ALLOCATE_BUFFER: + dev_dbg(shrm->dev, "DLP_IOC_ALLOCATE_BUFFER\n"); + break; + case DLP_IOC_PUT_MESSAGE: + dev_dbg(shrm->dev, "DLP_IOC_PUT_MESSAGE\n"); + break; + case DLP_IOC_GET_MESSAGE: + dev_dbg(shrm->dev, "DLP_IOC_GET_MESSAGE\n"); + break; + case DLP_IOC_DEALLOCATE_BUFFER: + dev_dbg(shrm->dev, "DLP_IOC_DEALLOCATE_BUFFER\n"); + break; + default: + dev_dbg(shrm->dev, "Unknown IOCTL\n"); + err = -1; + break; + } + return err; +} +/** + * isa_mmap() - Maps kernel queue memory to user space. + * + * @filp:file descriptor pointer + * @vma:virtual area memory structure. + * + * This function maps kernel FIFO into user space. This function + * shall be called twice to map both uplink and downlink buffers. + */ +static int isa_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + + u32 m = iminor(filp->f_path.dentry->d_inode); + dev_dbg(shrm->dev, "%s %dIN\n", __func__, m); + + isadev = (struct isadev_context *)filp->private_data; + return 0; +} + +/** + * isa_close() - Close device file + * + * @inode:structure is used by the kernel internally to represent files + * @filp:device file descriptor + * + * This function deletes structues associated with this file, deletes + * queues, flushes and destroys workqueus and closes this file. + * It also unregisters itself from l2mux driver. + */ +static int isa_close(struct inode *inode, struct file *filp) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct isa_driver_context *isa_context = shrm->isa_context; + u8 m; + + mutex_lock(&isa_lock); + m = iminor(filp->f_path.dentry->d_inode); + dev_dbg(shrm->dev, "%s IN %d", __func__, m); + + if (atomic_dec_and_test(&isa_context->is_open[m])) { + atomic_inc(&isa_context->is_open[m]); + dev_err(shrm->dev, "Device not opened yet\n"); + mutex_unlock(&isa_lock); + return -ENODEV; + } + atomic_set(&isa_context->is_open[m], 1); + + dev_dbg(shrm->dev, "isadev->device_id %d", isadev->device_id); + dev_dbg(shrm->dev, "Closed %d device\n", m); + + if (m == ISI_MESSAGING) + dev_dbg(shrm->dev, "Closed ISI_MESSAGING Device\n"); + else if (m == RPC_MESSAGING) + dev_dbg(shrm->dev, "Closed RPC_MESSAGING Device\n"); + else if (m == AUDIO_MESSAGING) + dev_dbg(shrm->dev, "Closed AUDIO_MESSAGING Device\n"); + else if (m == SECURITY_MESSAGING) + dev_dbg(shrm->dev, "Closed SECURITY_MESSAGING Device\n"); + else + dev_dbg(shrm->dev, NAME ":No such device present\n"); + + mutex_unlock(&isa_lock); + return 0; +} +/** + * isa_open() - Open device file + * + * @inode: structure is used by the kernel internally to represent files + * @filp: device file descriptor + * + * This function performs initialization tasks needed to open SHM channel. + * Following tasks are performed. + * -return if device is already opened + * -create uplink FIFO + * -create downlink FIFO + * -init delayed workqueue thread + * -register to l2mux driver + */ +static int isa_open(struct inode *inode, struct file *filp) +{ + int err = 0; + u8 m; + struct isadev_context *isadev; + struct isa_driver_context *isa_context = container_of( + inode->i_cdev, + struct isa_driver_context, + cdev); + struct shrm_dev *shrm = isa_context->isadev->dl_queue.shrm; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (get_boot_state() != BOOT_DONE) { + dev_err(shrm->dev, "Boot is not done\n"); + return -EBUSY; + } + mutex_lock(&isa_lock); + m = iminor(inode); + + if ((m != ISI_MESSAGING) && (m != RPC_MESSAGING) && + (m != AUDIO_MESSAGING) && (m != SECURITY_MESSAGING)) { + dev_err(shrm->dev, "No such device present\n"); + mutex_unlock(&isa_lock); + return -ENODEV; + } + if (!atomic_dec_and_test(&isa_context->is_open[m])) { + atomic_inc(&isa_context->is_open[m]); + dev_err(shrm->dev, "Device already opened\n"); + mutex_unlock(&isa_lock); + return -EBUSY; + } + + if (m == ISI_MESSAGING) + dev_dbg(shrm->dev, "Open ISI_MESSAGING Device\n"); + else if (m == RPC_MESSAGING) + dev_dbg(shrm->dev, "Open RPC_MESSAGING Device\n"); + else if (m == AUDIO_MESSAGING) + dev_dbg(shrm->dev, "Open AUDIO_MESSAGING Device\n"); + else if (m == SECURITY_MESSAGING) + dev_dbg(shrm->dev, "Open SECURITY_MESSAGING Device\n"); + else + dev_dbg(shrm->dev, ":No such device present\n"); + + isadev = &isa_context->isadev[m]; + if (filp != NULL) + filp->private_data = isadev; + + mutex_unlock(&isa_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return err; +} + +const struct file_operations isa_fops = { + .owner = THIS_MODULE, + .open = isa_open, + .release = isa_close, + .ioctl = isa_ioctl, + .mmap = isa_mmap, + .read = isa_read, + .write = isa_write, + .poll = isa_select, +}; + +/** + * isa_init() - module insertion function + * + * This function registers module as a character driver using + * register_chrdev_region() or alloc_chrdev_region. It adds this + * driver to system using cdev_add() call. Major number is dynamically + * allocated using alloc_chrdev_region() by default or left to user to specify + * it during load time. For this variable major is used as module_param + * Nodes to be created using + * mknod /dev/isi c $major 0 + * mknod /dev/rpc c $major 1 + * mknod /dev/audio c $major 2 + * mknod /dev/sec c $major 3 + */ +int isa_init(struct shrm_dev *shrm) +{ + dev_t dev_id; + int retval, no_dev; + struct isadev_context *isadev; + struct isa_driver_context *isa_context; + + isa_context = kzalloc(sizeof(struct isa_driver_context), + GFP_KERNEL); + shrm->isa_context = isa_context; + if (isa_context == NULL) { + dev_err(shrm->dev, "Failed to alloc memory\n"); + return -ENOMEM; + } + + if (major) { + dev_id = MKDEV(major, 0); + retval = register_chrdev_region(dev_id, ISA_DEVICES, NAME); + } else { + retval = alloc_chrdev_region(&dev_id, 0, ISA_DEVICES, NAME); + major = MAJOR(dev_id); + } + + dev_dbg(shrm->dev, "major %d\n", major); + + cdev_init(&isa_context->cdev, &isa_fops); + isa_context->cdev.owner = THIS_MODULE; + retval = cdev_add(&isa_context->cdev, dev_id, ISA_DEVICES); + if (retval) { + dev_err(shrm->dev, "Failed to add char device\n"); + return retval; + } + + for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) + atomic_set(&isa_context->is_open[no_dev], 1); + + isa_context->isadev = kzalloc(sizeof + (struct isadev_context)*ISA_DEVICES, + GFP_KERNEL); + if (isa_context->isadev == NULL) { + dev_err(shrm->dev, "Failed to alloc memory\n"); + return -ENOMEM; + } + for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) { + isadev = &isa_context->isadev[no_dev]; + isadev->device_id = no_dev; + retval = create_queue(&isadev->dl_queue, + isadev->device_id, shrm); + if (retval < 0) { + dev_err(shrm->dev, "create dl_queue failed\n"); + delete_queue(&isadev->dl_queue); + kfree(isadev); + return retval; + } + } + mutex_init(&isa_context->tx_audio_mutex); + spin_lock_init(&isa_context->common_tx); + + dev_err(shrm->dev, "SHRM char driver added\n"); + + return retval; +} + +void isa_exit(struct shrm_dev *shrm) +{ + int no_dev; + struct isadev_context *isadev; + struct isa_driver_context *isa_context = shrm->isa_context; + dev_t dev_id = MKDEV(major, 0); + + for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) { + isadev = &isa_context->isadev[no_dev]; + delete_queue(&isadev->dl_queue); + kfree(isadev); + } + + cdev_del(&isa_context->cdev); + unregister_chrdev_region(dev_id, ISA_DEVICES); + kfree(isa_context); + + dev_err(shrm->dev, "SHRM char driver removed\n"); +} + +#ifdef CONFIG_HIGH_RES_TIMERS +static enum hrtimer_restart callback(struct hrtimer *timer) +{ + return HRTIMER_NORESTART; +} +#endif + + +static int __init shrm_probe(struct platform_device *pdev) +{ + int err = 0; + struct resource *res; + struct shrm_dev *shrm = NULL; + + if (pdev == NULL) { + dev_err(shrm->dev, + "No device/platform_data found on shm device\n"); + return -ENODEV; + } + + + shrm = kzalloc(sizeof(struct shrm_dev), GFP_KERNEL); + if (shrm == NULL) { + dev_err(shrm->dev, + "Could not allocate memory for struct shm_dev\n"); + return -ENOMEM; + } + shrm->dev = &pdev->dev; + + /* initialise the SHM */ + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(shrm->dev, "Unable to map Ca Wake up interrupt\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_wake_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_common IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_0_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_1_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 3); + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_common IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_0_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 4); + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_1_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(shrm->dev, + "Could not get SHM IO memory information\n"); + err = -ENODEV; + goto rollback_intr; + } + + shrm->intr_base = (void __iomem *)ioremap_nocache(res->start, + res->end - res->start + 1); + + if (!(shrm->intr_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_intr; + } + + shrm->ape_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_COMMON_BASE; + shrm->ape_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_APE_COMMON_BASE, + SHM_FIFO_0_SIZE); + shrm->ape_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->ape_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_common_fifo_base; + } + + shrm->cmt_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_COMMON_BASE; + + shrm->cmt_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_CMT_COMMON_BASE, SHM_FIFO_0_SIZE); + shrm->cmt_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->cmt_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_common_fifo_base; + } + + shrm->ape_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_AUDIO_BASE; + shrm->ape_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_APE_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->ape_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->ape_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_audio_fifo_base; + } + + shrm->cmt_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_AUDIO_BASE; + shrm->cmt_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_CMT_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->cmt_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->cmt_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_audio_fifo_base; + } + + shrm->ac_common_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ac_common_shared_wptr; + } + + shrm->ac_common_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ca_common_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + shrm->ca_common_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ac_audio_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ac_audio_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ca_audio_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ca_audio_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + if (isa_init(shrm) != 0) { + dev_err(shrm->dev, "Driver Initialization Error\n"); + err = -EBUSY; + } + /* install handlers and tasklets */ + if (shm_initialise_irq(shrm)) { + dev_err(shrm->dev, "shm error in interrupt registration\n"); + goto rollback_irq; + } + +#ifdef CONFIG_HIGH_RES_TIMERS + hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer.function = callback; + + hrtimer_start(&timer, ktime_set(0, 2*NSEC_PER_MSEC), HRTIMER_MODE_REL); +#endif + + return err; + +rollback_irq: + free_shm_irq(shrm); +rollback_map: + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); +rollback_ac_common_shared_wptr: + iounmap(shrm->cmt_audio_fifo_base); +rollback_cmt_audio_fifo_base: + iounmap(shrm->ape_audio_fifo_base); +rollback_ape_audio_fifo_base: + iounmap(shrm->cmt_common_fifo_base); +rollback_cmt_common_fifo_base: + iounmap(shrm->ape_common_fifo_base); +rollback_ape_common_fifo_base: + iounmap(shrm->intr_base); +rollback_intr: + kfree(shrm); + return err; +} + +static int __exit shrm_remove(struct platform_device *pdev) +{ + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + free_shm_irq(shrm); + iounmap(shrm->intr_base); + iounmap(shrm->ape_common_fifo_base); + iounmap(shrm->cmt_common_fifo_base); + iounmap(shrm->ape_audio_fifo_base); + iounmap(shrm->cmt_audio_fifo_base); + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); + kfree(shrm); + isa_exit(shrm); + + return 0; +} +#ifdef CONFIG_PM + +/** + * u8500_shrm_suspend() - This routine puts the SHRM in to sustend state. + * @pdev: platform device. + * + * This routine checks the current ongoing communication with Modem by + * examining the ca_wake state and prevents suspend if modem communication + * is on-going. + * If ca_wake = 1 (high), modem comm. is on-going; don't suspend + * If ca_wake = 0 (low), no comm. with modem on-going.Allow suspend + */ +int u8500_shrm_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + dev_dbg(shrm->dev, "%s called...\n", __func__); + dev_dbg(shrm->dev, "\n ca_wake_req_state = %x\n", + get_ca_wake_req_state()); + /* if ca_wake_req is high, prevent system suspend */ + if (get_ca_wake_req_state()) + return -EBUSY; + else + return 0; +} + +/** + * u8500_shrm_resume() - This routine resumes the SHRM from sustend state. + * @pdev: platform device. + * + * This routine restore back the current state of the SHRM + */ +int u8500_shrm_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + dev_dbg(shrm->dev, "%s called...\n", __func__); + /* TODO: + * As of now, no state save takes place in suspend. + * So, nothing to restore in resume. + * Simply return as of now. + * State saved in suspend should be restored here. + */ + + return 0; +} + +static const struct dev_pm_ops shrm_dev_pm_ops = { + .suspend = u8500_shrm_suspend, + .resume = u8500_shrm_resume, +}; +#endif + +static struct platform_driver shrm_driver = { + .remove = __exit_p(shrm_remove), + .driver = { + .name = "u8500_shrm", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &shrm_dev_pm_ops, +#endif + }, +}; + +static int __init shrm_driver_init(void) +{ + return platform_driver_probe(&shrm_driver, shrm_probe); +} + +static void __exit shrm_driver_exit(void) +{ + platform_driver_unregister(&shrm_driver); +} + +module_init(shrm_driver_init); +module_exit(shrm_driver_exit); + +MODULE_AUTHOR("Biju Das"); +MODULE_DESCRIPTION("Shared Memory Modem Driver Interface"); +MODULE_LICENSE("GPL"); diff --git a/drivers/misc/shrm/shrm_fifo.c b/drivers/misc/shrm/shrm_fifo.c new file mode 100644 index 00000000000..ecf4b7e4466 --- /dev/null +++ b/drivers/misc/shrm/shrm_fifo.c @@ -0,0 +1,829 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include + +#define L1_BOOT_INFO_REQ 1 +#define L1_BOOT_INFO_RESP 2 +#define L1_NORMAL_MSG 3 +#define L1_HEADER_MASK 28 +#define L1_MAPID_MASK 0xF0000000 +#define CONFIG_OFFSET 8 +#define COUNTER_OFFSET 20 +#define L2_HEADER_SIZE 4 +#define L2_HEADER_OFFSET 24 +#define MASK_0_15_BIT 0xFF +#define MASK_16_31_BIT 0xFF00 +#define MASK_16_27_BIT 0xFFF0000 +#define MASK_0_39_BIT 0xFFFFF +#define MASK_40_55_BIT 0xFF00000 +#define MASK_8_16_BIT 0x0000FF00 +#define MSG_LEN_OFFSET 16 +#define SHRM_VER 2 +#define ca_ist_inactivity_timer 100 /*100ms */ +#define ca_csc_inactivity_timer 100 /*100ms */ + +static u8 msg_audio_counter; +static u8 msg_common_counter; + +struct fifo_write_params ape_shm_fifo_0; +struct fifo_write_params ape_shm_fifo_1; +struct fifo_read_params cmt_shm_fifo_0; +struct fifo_read_params cmt_shm_fifo_1; + + +static u8 cmt_read_notif_0_send; +static u8 cmt_read_notif_1_send; + +void shm_fifo_init(struct shrm_dev *shrm) +{ + ape_shm_fifo_0.writer_local_wptr = 0; + ape_shm_fifo_0.writer_local_rptr = 0; + *((u32 *)shrm->ac_common_shared_wptr) = 0; + *((u32 *)shrm->ac_common_shared_rptr) = 0; + ape_shm_fifo_0.shared_wptr = 0; + ape_shm_fifo_0.shared_rptr = 0; + ape_shm_fifo_0.availablesize = shrm->ape_common_fifo_size; + ape_shm_fifo_0.end_addr_fifo = shrm->ape_common_fifo_size; + ape_shm_fifo_0.fifo_virtual_addr = shrm->ape_common_fifo_base; + spin_lock_init(&ape_shm_fifo_0.fifo_update_lock); + + + cmt_shm_fifo_0.reader_local_rptr = 0; + cmt_shm_fifo_0.reader_local_wptr = 0; + cmt_shm_fifo_0.shared_wptr = + *((u32 *)shrm->ca_common_shared_wptr); + cmt_shm_fifo_0.shared_rptr = + *((u32 *)shrm->ca_common_shared_rptr); + cmt_shm_fifo_0.availablesize = shrm->cmt_common_fifo_size; + cmt_shm_fifo_0.end_addr_fifo = shrm->cmt_common_fifo_size; + cmt_shm_fifo_0.fifo_virtual_addr = shrm->cmt_common_fifo_base; + + ape_shm_fifo_1.writer_local_wptr = 0; + ape_shm_fifo_1.writer_local_rptr = 0; + ape_shm_fifo_1.shared_wptr = 0; + ape_shm_fifo_1.shared_rptr = 0; + *((u32 *)shrm->ac_audio_shared_wptr) = 0; + *((u32 *)shrm->ac_audio_shared_rptr) = 0; + ape_shm_fifo_1.availablesize = shrm->ape_audio_fifo_size; + ape_shm_fifo_1.end_addr_fifo = shrm->ape_audio_fifo_size; + ape_shm_fifo_1.fifo_virtual_addr = shrm->ape_audio_fifo_base; + spin_lock_init(&ape_shm_fifo_1.fifo_update_lock); + + cmt_shm_fifo_1.reader_local_rptr = 0; + cmt_shm_fifo_1.reader_local_wptr = 0; + cmt_shm_fifo_1.shared_wptr = + *((u32 *)shrm->ca_audio_shared_wptr); + cmt_shm_fifo_1.shared_rptr = + *((u32 *)shrm->ca_audio_shared_rptr); + cmt_shm_fifo_1.availablesize = shrm->cmt_audio_fifo_size; + cmt_shm_fifo_1.end_addr_fifo = shrm->cmt_audio_fifo_size; + cmt_shm_fifo_1.fifo_virtual_addr = shrm->cmt_audio_fifo_base; + msg_audio_counter = 0; + msg_common_counter = 0; +} + +u8 read_boot_info_req(struct shrm_dev *shrm, + u32 *config, + u32 *version) +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + u32 *msg; + u32 header = 0; + u8 msgtype; + + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->reader_local_rptr + fifo->fifo_virtual_addr); + header = *msg; + msgtype = (header & L1_MAPID_MASK) >> L1_MSG_MAPID_OFFSET; + if (msgtype != L1_BOOT_INFO_REQ) { + dev_err(shrm->dev, "Read_Boot_Info_Req Fatal ERROR\n"); + BUG(); + } + *config = (header >> CONFIG_OFFSET) & MASK_0_15_BIT; + *version = header & MASK_0_15_BIT; + fifo->reader_local_rptr += 1; + + return 1; +} + +void write_boot_info_resp(struct shrm_dev *shrm, u32 config, + u32 version) +{ + struct fifo_write_params *fifo = &ape_shm_fifo_0; + u32 *msg; + u8 msg_length; + version = SHRM_VER; + + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->writer_local_wptr+fifo->fifo_virtual_addr); + if (version < 1) { + *msg = ((L1_BOOT_INFO_RESP << L1_MSG_MAPID_OFFSET) | + ((config << CONFIG_OFFSET) & MASK_16_31_BIT) + | (version & MASK_0_15_BIT)); + msg_length = 1; + } else { + *msg = ((L1_BOOT_INFO_RESP << L1_MSG_MAPID_OFFSET) | + ((0x8 << MSG_LEN_OFFSET) & MASK_16_27_BIT) | + ((config << CONFIG_OFFSET) & MASK_8_16_BIT)| + version); + msg++; + *msg = ca_ist_inactivity_timer; + msg++; + *msg = ca_csc_inactivity_timer; + msg_length = L1_NORMAL_MSG; + } + spin_lock(&fifo->fifo_update_lock); + fifo->writer_local_wptr += msg_length; + fifo->availablesize -= msg_length; + spin_unlock(&fifo->fifo_update_lock); +} + +/** + * shm_write_msg_to_fifo() - write message to FIFO + * @shrm: pointer to shrm device information structure + * @channel: audio or common channel + * @l2header: L2 header or device ID + * @addr: pointer to write buffer address + * @length: length of mst to write + * + * Function Which Writes the data into Fifo in IPC zone + * It is called from shm_write_msg. This function will copy the msg + * from the kernel buffer to FIFO. There are 4 kernel buffers from where + * the data is to copied to FIFO one for each of the messages ISI, RPC, + * AUDIO and SECURITY. ISI, RPC and SECURITY messages are pushed to FIFO + * in commmon channel and AUDIO message is pushed onto audio channel FIFO. + */ +int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, + u8 l2header, void *addr, u32 length) +{ + struct fifo_write_params *fifo = NULL; + u32 l1_header = 0, l2_header = 0; + u32 requiredsize; + u32 size = 0; + u32 *msg; + u8 *src; + + if (channel == COMMON_CHANNEL) + fifo = &ape_shm_fifo_0; + else if (channel == AUDIO_CHANNEL) + fifo = &ape_shm_fifo_1; + else { + dev_err(shrm->dev, "invalid channel\n"); + return -EINVAL; + } + + /* L2 size in 32b */ + requiredsize = ((length + 3) / 4); + /* Add size of L1 & L2 header */ + requiredsize += 2; + + /* if availablesize = or < requiredsize then error */ + if (fifo->availablesize <= requiredsize) { + /* Fatal ERROR - should never happens */ + dev_dbg(shrm->dev, "wr_wptr= %x\n", + fifo->writer_local_wptr); + dev_dbg(shrm->dev, "wr_rptr= %x\n", + fifo->writer_local_rptr); + dev_dbg(shrm->dev, "shared_wptr= %x\n", + fifo->shared_wptr); + dev_dbg(shrm->dev, "shared_rptr= %x\n", + fifo->shared_rptr); + dev_dbg(shrm->dev, "availsize= %x\n", + fifo->availablesize); + dev_dbg(shrm->dev, "end__fifo= %x\n", + fifo->end_addr_fifo); + dev_warn(shrm->dev, "Modem is busy, please wait." + " c_cnt = %d; a_cnt = %d\n", msg_common_counter, + msg_audio_counter); + if (channel == COMMON_CHANNEL) { + dev_warn(shrm->dev, + "Modem is lagging behind in reading." + "Stopping n/w dev queue\n"); + shrm_stop_netdev(shrm->ndev); + } + + return -EAGAIN; + } + + if (channel == COMMON_CHANNEL) { + /* build L1 header */ + l1_header = ((L1_NORMAL_MSG << L1_MSG_MAPID_OFFSET) | + (((msg_common_counter++) << COUNTER_OFFSET) + & MASK_40_55_BIT) | + ((length + L2_HEADER_SIZE) & MASK_0_39_BIT)); + } else if (channel == AUDIO_CHANNEL) { + /* build L1 header */ + l1_header = ((L1_NORMAL_MSG << L1_MSG_MAPID_OFFSET) | + (((msg_audio_counter++) << COUNTER_OFFSET) + & MASK_40_55_BIT) | + ((length + L2_HEADER_SIZE) & MASK_0_39_BIT)); + } + + /* + * Need to take care race condition for fifo->availablesize + * & fifo->writer_local_rptr with Ac_Read_notification interrupt. + * One option could be use stack variable for LocalRptr and recompute + * fifo->availablesize,based on flag enabled in the + * Ac_read_notification + */ + l2_header = ((l2header << L2_HEADER_OFFSET) | + ((length) & MASK_0_39_BIT)); + /* Check Local Rptr is less than or equal to Local WPtr */ + if (fifo->writer_local_rptr <= fifo->writer_local_wptr) { + msg = (u32 *) + (fifo->fifo_virtual_addr+fifo->writer_local_wptr); + + /* check enough place bewteen writer_local_wptr & end of FIFO */ + if ((fifo->end_addr_fifo-fifo->writer_local_wptr) >= + requiredsize) { + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + + /* copy the l2 message in 1 memcpy */ + memcpy((void *)msg, addr, length); + /* UpdateWptr */ + spin_lock_bh(&fifo->fifo_update_lock); + fifo->writer_local_wptr += requiredsize; + fifo->availablesize -= requiredsize; + fifo->writer_local_wptr %= fifo->end_addr_fifo; + spin_unlock_bh(&fifo->fifo_update_lock); + } else { + /* + * message is split between and of FIFO and beg of FIFO + * copy first part from writer_local_wptr to end of FIFO + */ + size = fifo->end_addr_fifo-fifo->writer_local_wptr; + + if (size == 1) { + /* Add L1 header */ + *msg = l1_header; + msg++; + spin_lock_bh(&fifo->fifo_update_lock); + /* UpdateWptr */ + fifo->writer_local_wptr = 0; + fifo->availablesize -= size; + /* + * copy second part from beg of FIFO + * with remaining part of msg + */ + msg = (u32 *) + fifo->fifo_virtual_addr; + *msg = l2_header; + msg++; + + /* copy the l3 message in 1 memcpy */ + memcpy((void *)msg, addr, length); + /* UpdateWptr */ + fifo->writer_local_wptr += + requiredsize-size; + fifo->availablesize -= + (requiredsize-size); + spin_unlock_bh(&fifo->fifo_update_lock); + } else if (size == 2) { + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + + spin_lock_bh(&fifo->fifo_update_lock); + /* UpdateWptr */ + fifo->writer_local_wptr = 0; + fifo->availablesize -= size; + + /* + * copy second part from beg of FIFO + * with remaining part of msg + */ + msg = (u32 *) + fifo->fifo_virtual_addr; + /* copy the l3 message in 1 memcpy */ + memcpy((void *)msg, addr, length); + + /* UpdateWptr */ + fifo->writer_local_wptr += + requiredsize-size; + fifo->availablesize -= + (requiredsize-size); + spin_unlock_bh(&fifo->fifo_update_lock); + } else { + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + + /* copy the l2 message in 1 memcpy */ + memcpy((void *)msg, addr, (size-2)*4); + + spin_lock_bh(&fifo->fifo_update_lock); + + /* UpdateWptr */ + fifo->writer_local_wptr = 0; + fifo->availablesize -= size; + + /* + * copy second part from beg of FIFO + * with remaining part of msg + */ + msg = (u32 *)fifo->fifo_virtual_addr; + src = (u8 *)addr+((size - 2) * 4); + memcpy((void *)msg, src, + (length-((size - 2) * 4))); + + /* UpdateWptr */ + fifo->writer_local_wptr += + requiredsize-size; + fifo->availablesize -= + (requiredsize-size); + spin_unlock_bh(&fifo->fifo_update_lock); + } + + } + } else { + /* writer_local_rptr > writer_local_wptr */ + msg = (u32 *) + (fifo->fifo_virtual_addr+fifo->writer_local_wptr); + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + /* + * copy message possbile between writer_local_wptr up + * to writer_local_rptr copy the l3 message in 1 memcpy + */ + memcpy((void *)msg, addr, length); + + spin_lock_bh(&fifo->fifo_update_lock); + /* UpdateWptr */ + fifo->writer_local_wptr += requiredsize; + fifo->availablesize -= requiredsize; + spin_unlock_bh(&fifo->fifo_update_lock); + + } + return length; +} + +/** + * read_one_l2msg_common() - read message from common channel + * @shrm: pointer to shrm device information structure + * @l2_msg: pointer to the read L2 message buffer + * @len: message length + * + * This function read one message from the FIFO and returns l2 header type + */ +u8 read_one_l2msg_common(struct shrm_dev *shrm, + u8 *l2_msg, u32 *len) +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + + u32 *msg; + u32 l1_header = 0; + u32 l2_header = 0; + u32 length; + u8 msgtype; + u32 msg_size; + u32 size = 0; + + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->reader_local_rptr+fifo->fifo_virtual_addr); + l1_header = *msg++; + msgtype = (l1_header & 0xF0000000) >> L1_HEADER_MASK; + + if (msgtype != L1_NORMAL_MSG) { + /* Fatal ERROR - should never happens */ + dev_dbg(shrm->dev, "wr_wptr= %x\n", + fifo->reader_local_wptr); + dev_dbg(shrm->dev, "wr_rptr= %x\n", + fifo->reader_local_rptr); + dev_dbg(shrm->dev, "shared_wptr= %x\n", + fifo->shared_wptr); + dev_dbg(shrm->dev, "shared_rptr= %x\n", + fifo->shared_rptr); + dev_dbg(shrm->dev, "availsize= %x\n", + fifo->availablesize); + dev_dbg(shrm->dev, "end_fifo= %x\n", + fifo->end_addr_fifo); + /* Fatal ERROR - should never happens */ + dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); + BUG(); + } + if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { + l2_header = (*((u32 *)fifo->fifo_virtual_addr)); + length = l2_header & MASK_0_39_BIT; + } else { + /* Read L2 header,Msg size & content of reader_local_rptr */ + l2_header = *msg; + length = l2_header & MASK_0_39_BIT; + } + + *len = length; + msg_size = ((length + 3) / 4); + msg_size += 2; + + if (fifo->reader_local_rptr + msg_size <= + fifo->end_addr_fifo) { + /* Skip L2 header */ + msg++; + + /* read msg between reader_local_rptr and end of FIFO */ + memcpy((void *)l2_msg, (void *)msg, length); + /* UpdateLocalRptr */ + fifo->reader_local_rptr += msg_size; + fifo->reader_local_rptr %= fifo->end_addr_fifo; + } else { + /* + * msg split between end of FIFO and beg copy first + * part of msg read msg between reader_local_rptr + * and end of FIFO + */ + size = fifo->end_addr_fifo-fifo->reader_local_rptr; + if (size == 1) { + msg = (u32 *)(fifo->fifo_virtual_addr); + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)(msg), length); + } else if (size == 2) { + /* Skip L2 header */ + msg++; + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, + (void *)(msg), length); + } else { + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)msg, ((size - 2) * 4)); + /* copy second part of msg */ + l2_msg += ((size - 2) * 4); + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, (void *)(msg), + (length-((size - 2) * 4))); + } + fifo->reader_local_rptr = + (fifo->reader_local_rptr+msg_size) % + fifo->end_addr_fifo; + } + return (l2_header>>L2_HEADER_OFFSET) & MASK_0_15_BIT; + } + +u8 read_remaining_messages_common() +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + /* + * There won't be any Race condition reader_local_rptr & + * fifo->reader_local_wptr with CaMsgpending Notification Interrupt + */ + return ((fifo->reader_local_rptr != fifo->reader_local_wptr) ? 1 : 0); +} + +u8 read_one_l2msg_audio(struct shrm_dev *shrm, + u8 *l2_msg, u32 *len) +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_1; + + u32 *msg; + u32 l1_header = 0; + u32 l2_header = 0; + u32 length; + u8 msgtype; + u32 msg_size; + u32 size = 0; + + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->reader_local_rptr+fifo->fifo_virtual_addr); + l1_header = *msg++; + msgtype = (l1_header & 0xF0000000) >> L1_HEADER_MASK; + + if (msgtype != L1_NORMAL_MSG) { + /* Fatal ERROR - should never happens */ + dev_dbg(shrm->dev, "wr_local_wptr= %x\n", + fifo->reader_local_wptr); + dev_dbg(shrm->dev, "wr_local_rptr= %x\n", + fifo->reader_local_rptr); + dev_dbg(shrm->dev, "shared_wptr= %x\n", + fifo->shared_wptr); + dev_dbg(shrm->dev, "shared_rptr= %x\n", + fifo->shared_rptr); + dev_dbg(shrm->dev, "availsize=%x\n", + fifo->availablesize); + dev_dbg(shrm->dev, "end_fifo= %x\n", + fifo->end_addr_fifo); + /* Fatal ERROR - should never happens */ + dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); + BUG(); + } + if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { + l2_header = (*((u32 *)fifo->fifo_virtual_addr)); + length = l2_header & MASK_0_39_BIT; + } else { + /* Read L2 header,Msg size & content of reader_local_rptr */ + l2_header = *msg; + length = l2_header & MASK_0_39_BIT; + } + + *len = length; + msg_size = ((length + 3) / 4); + msg_size += 2; + + if (fifo->reader_local_rptr + msg_size <= + fifo->end_addr_fifo) { + /* Skip L2 header */ + msg++; + /* read msg between reader_local_rptr and end of FIFO */ + memcpy((void *)l2_msg, (void *)msg, length); + /* UpdateLocalRptr */ + fifo->reader_local_rptr += msg_size; + fifo->reader_local_rptr %= fifo->end_addr_fifo; + } else { + + /* + * msg split between end of FIFO and beg + * copy first part of msg + * read msg between reader_local_rptr and end of FIFO + */ + size = fifo->end_addr_fifo-fifo->reader_local_rptr; + if (size == 1) { + msg = (u32 *)(fifo->fifo_virtual_addr); + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)(msg), length); + } else if (size == 2) { + /* Skip L2 header */ + msg++; + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, (void *)(msg), length); + } else { + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)msg, ((size - 2) * 4)); + /* copy second part of msg */ + l2_msg += ((size - 2) * 4); + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, (void *)(msg), + (length-((size - 2) * 4))); + } + fifo->reader_local_rptr = + (fifo->reader_local_rptr+msg_size) % + fifo->end_addr_fifo; + + } + return (l2_header>>L2_HEADER_OFFSET) & MASK_0_15_BIT; + } + +u8 read_remaining_messages_audio() +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_1; + + return ((fifo->reader_local_rptr != fifo->reader_local_wptr) ? + 1 : 0); +} + +u8 is_the_only_one_unread_message(struct shrm_dev *shrm, + u8 channel, u32 length) +{ + struct fifo_write_params *fifo = NULL; + u32 messagesize = 0; + u8 is_only_one_unread_msg = 0; + + if (channel == COMMON_CHANNEL) + fifo = &ape_shm_fifo_0; + else /* channel = AUDIO_CHANNEL */ + fifo = &ape_shm_fifo_1; + + /* L3 size in 32b */ + messagesize = ((length + 3) / 4); + /* Add size of L1 & L2 header */ + messagesize += 2; + /* + * possibility of race condition with Ac Read notification interrupt. + * need to check ? + */ + if (fifo->writer_local_wptr > fifo->writer_local_rptr) + is_only_one_unread_msg = + ((fifo->writer_local_rptr + messagesize) == + fifo->writer_local_wptr) ? 1 : 0; + else + /* Msg split between end of fifo and starting of Fifo */ + is_only_one_unread_msg = + (((fifo->writer_local_rptr + messagesize) % + fifo->end_addr_fifo) == fifo->writer_local_wptr) ? + 1 : 0; + + return is_only_one_unread_msg; +} + +void update_ca_common_local_wptr(struct shrm_dev *shrm) +{ + /* + * update CA common reader local write pointer with the + * shared write pointer + */ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + + fifo->shared_wptr = + (*((u32 *)shrm->ca_common_shared_wptr)); + fifo->reader_local_wptr = fifo->shared_wptr; +} + +void update_ca_audio_local_wptr(struct shrm_dev *shrm) +{ + /* + * update CA audio reader local write pointer with the + * shared write pointer + */ + struct fifo_read_params *fifo = &cmt_shm_fifo_1; + + fifo->shared_wptr = + (*((u32 *)shrm->ca_audio_shared_wptr)); + fifo->reader_local_wptr = fifo->shared_wptr; +} + +void update_ac_common_local_rptr(struct shrm_dev *shrm) +{ + /* + * update AC common writer local read pointer with the + * shared read pointer + */ + struct fifo_write_params *fifo; + u32 free_space = 0; + + fifo = &ape_shm_fifo_0; + + fifo->shared_rptr = + (*((u32 *)shrm->ac_common_shared_rptr)); + + if (fifo->shared_rptr >= fifo->writer_local_rptr) + free_space = + (fifo->shared_rptr-fifo->writer_local_rptr); + else { + free_space = + (fifo->end_addr_fifo-fifo->writer_local_rptr); + free_space += fifo->shared_rptr; + } + + /* Chance of race condition of below variables with write_msg */ + spin_lock(&fifo->fifo_update_lock); + fifo->availablesize += free_space; + fifo->writer_local_rptr = fifo->shared_rptr; + spin_unlock(&fifo->fifo_update_lock); +} + +void update_ac_audio_local_rptr(struct shrm_dev *shrm) +{ + /* + * update AC audio writer local read pointer with the + * shared read pointer + */ + struct fifo_write_params *fifo; + u32 free_space = 0; + + fifo = &ape_shm_fifo_1; + fifo->shared_rptr = + (*((u32 *)shrm->ac_audio_shared_rptr)); + + if (fifo->shared_rptr >= fifo->writer_local_rptr) + free_space = + (fifo->shared_rptr-fifo->writer_local_rptr); + else { + free_space = + (fifo->end_addr_fifo-fifo->writer_local_rptr); + free_space += fifo->shared_rptr; + } + + /* Chance of race condition of below variables with write_msg */ + spin_lock(&fifo->fifo_update_lock); + fifo->availablesize += free_space; + fifo->writer_local_rptr = fifo->shared_rptr; + spin_unlock(&fifo->fifo_update_lock); +} + +void update_ac_common_shared_wptr(struct shrm_dev *shrm) +{ + /* + * update AC common shared write pointer with the + * local write pointer + */ + struct fifo_write_params *fifo; + + fifo = &ape_shm_fifo_0; + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ac_common_shared_wptr)) = + fifo->writer_local_wptr; + + fifo->shared_wptr = fifo->writer_local_wptr; +} + +void update_ac_audio_shared_wptr(struct shrm_dev *shrm) +{ + /* + * update AC audio shared write pointer with the + * local write pointer + */ + struct fifo_write_params *fifo; + + fifo = &ape_shm_fifo_1; + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ac_audio_shared_wptr)) = + fifo->writer_local_wptr; + fifo->shared_wptr = fifo->writer_local_wptr; +} + +void update_ca_common_shared_rptr(struct shrm_dev *shrm) +{ + /* + * update CA common shared read pointer with the + * local read pointer + */ + struct fifo_read_params *fifo; + + fifo = &cmt_shm_fifo_0; + + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ca_common_shared_rptr)) = + fifo->reader_local_rptr; + fifo->shared_rptr = fifo->reader_local_rptr; +} + +void update_ca_audio_shared_rptr(struct shrm_dev *shrm) +{ + /* + * update CA audio shared read pointer with the + * local read pointer + */ + struct fifo_read_params *fifo; + + fifo = &cmt_shm_fifo_1; + + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ca_audio_shared_rptr)) = + fifo->reader_local_rptr; + fifo->shared_rptr = fifo->reader_local_rptr; +} + +void get_reader_pointers(u8 channel_type, u32 *reader_local_rptr, + u32 *reader_local_wptr, u32 *shared_rptr) +{ + struct fifo_read_params *fifo = NULL; + + if (channel_type == COMMON_CHANNEL) + fifo = &cmt_shm_fifo_0; + else /* channel_type = AUDIO_CHANNEL */ + fifo = &cmt_shm_fifo_1; + + *reader_local_rptr = fifo->reader_local_rptr; + *reader_local_wptr = fifo->reader_local_wptr; + *shared_rptr = fifo->shared_rptr; +} + +void get_writer_pointers(u8 channel_type, u32 *writer_local_rptr, + u32 *writer_local_wptr, u32 *shared_wptr) +{ + struct fifo_write_params *fifo = NULL; + + if (channel_type == COMMON_CHANNEL) + fifo = &ape_shm_fifo_0; + else /* channel_type = AUDIO_CHANNEL */ + fifo = &ape_shm_fifo_1; + + *writer_local_rptr = fifo->writer_local_rptr; + *writer_local_wptr = fifo->writer_local_wptr; + *shared_wptr = fifo->shared_wptr; +} + +void set_ca_msg_0_read_notif_send(u8 val) +{ + cmt_read_notif_0_send = val; +} + +u8 get_ca_msg_0_read_notif_send(void) +{ + return cmt_read_notif_0_send; +} + +void set_ca_msg_1_read_notif_send(u8 val) +{ + cmt_read_notif_1_send = val; +} + +u8 get_ca_msg_1_read_notif_send(void) +{ + return cmt_read_notif_1_send; +} diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c new file mode 100644 index 00000000000..dd52f9e20ea --- /dev/null +++ b/drivers/misc/shrm/shrm_protocol.c @@ -0,0 +1,1177 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghvi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#define L2_HEADER_ISI 0x0 +#define L2_HEADER_RPC 0x1 +#define L2_HEADER_AUDIO 0x2 +#define L2_HEADER_SECURITY 0x3 +#define L2_HEADER_COMMON_SIMPLE_LOOPBACK 0xC0 +#define L2_HEADER_COMMON_ADVANCED_LOOPBACK 0xC1 +#define L2_HEADER_AUDIO_SIMPLE_LOOPBACK 0x80 +#define L2_HEADER_AUDIO_ADVANCED_LOOPBACK 0x81 +#define MAX_PAYLOAD 1024 + +static u8 boot_state = BOOT_INIT; +static u8 recieve_common_msg[8*1024]; +static u8 recieve_audio_msg[8*1024]; +static received_msg_handler rx_common_handler; +static received_msg_handler rx_audio_handler; +static struct hrtimer timer; +static char is_earlydrop; +struct sock *shrm_nl_sk; + +static char shrm_common_tx_state = SHRM_SLEEP_STATE; +static char shrm_common_rx_state = SHRM_SLEEP_STATE; +static char shrm_audio_tx_state = SHRM_SLEEP_STATE; +static char shrm_audio_rx_state = SHRM_SLEEP_STATE; + +static atomic_t ac_sleep_disable_count = ATOMIC_INIT(0); +static struct shrm_dev *shm_dev; + +/* Spin lock and tasklet declaration */ +DECLARE_TASKLET(shm_ca_0_tasklet, shm_ca_msgpending_0_tasklet, 0); +DECLARE_TASKLET(shm_ca_1_tasklet, shm_ca_msgpending_1_tasklet, 0); +DECLARE_TASKLET(shm_ac_read_0_tasklet, shm_ac_read_notif_0_tasklet, 0); +DECLARE_TASKLET(shm_ac_read_1_tasklet, shm_ac_read_notif_1_tasklet, 0); + +static DEFINE_MUTEX(ac_state_mutex); + +static DEFINE_SPINLOCK(ca_common_lock); +static DEFINE_SPINLOCK(ca_audio_lock); +static DEFINE_SPINLOCK(ca_wake_req_lock); +static DEFINE_SPINLOCK(boot_lock); + +enum shrm_nl { + SHRM_NL_MOD_RESET = 1, + SHRM_NL_MOD_QUERY_STATE, + SHRM_NL_USER_MOD_RESET, + SHRM_NL_STATUS_MOD_ONLINE, + SHRM_NL_STATUS_MOD_OFFLINE, +}; + +static void shm_ac_sleep_req_work(struct work_struct *work) +{ + mutex_lock(&ac_state_mutex); + if (atomic_read(&ac_sleep_disable_count) == 0) + prcmu_ac_sleep_req(); + mutex_unlock(&ac_state_mutex); +} + +static u32 get_host_accessport_val(void) +{ + u32 prcm_hostaccess; + + prcm_hostaccess = readl(PRCM_HOSTACCESS_REQ); + wmb(); + prcm_hostaccess = prcm_hostaccess & 0x01; + + return prcm_hostaccess; +} +static enum hrtimer_restart callback(struct hrtimer *timer) +{ + unsigned long flags; + + spin_lock_irqsave(&ca_wake_req_lock, flags); + if (((shrm_common_rx_state == SHRM_IDLE) || + (shrm_common_rx_state == SHRM_SLEEP_STATE)) + && ((shrm_common_tx_state == SHRM_IDLE) || + (shrm_common_tx_state == SHRM_SLEEP_STATE)) + && ((shrm_audio_rx_state == SHRM_IDLE) || + (shrm_audio_rx_state == SHRM_SLEEP_STATE)) + && ((shrm_audio_tx_state == SHRM_IDLE) || + (shrm_audio_tx_state == SHRM_SLEEP_STATE))) { + + shrm_common_rx_state = SHRM_SLEEP_STATE; + shrm_audio_rx_state = SHRM_SLEEP_STATE; + shrm_common_tx_state = SHRM_SLEEP_STATE; + shrm_audio_tx_state = SHRM_SLEEP_STATE; + + queue_work(shm_dev->shm_ac_sleep_wq, + &shm_dev->shm_ac_sleep_req); + + } + spin_unlock_irqrestore(&ca_wake_req_lock, flags); + + return HRTIMER_NORESTART; +} + +int nl_send_multicast_message(int msg, gfp_t gfp_mask) +{ + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh = NULL; + int err; + + /* prepare netlink message */ + skb = alloc_skb(NLMSG_SPACE(MAX_PAYLOAD), gfp_mask); + if (!skb) { + dev_err(shm_dev->dev, "%s:alloc_skb failed\n", __func__); + err = -ENOMEM; + goto out; + } + + nlh = (struct nlmsghdr *)skb->data; + nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD); + dev_dbg(shm_dev->dev, "nlh->nlmsg_len = %d\n", nlh->nlmsg_len); + + nlh->nlmsg_pid = 0; /* from kernel */ + nlh->nlmsg_flags = 0; + *(int *)NLMSG_DATA(nlh) = msg; + skb_put(skb, MAX_PAYLOAD); + /* sender is in group 1<<0 */ + NETLINK_CB(skb).pid = 0; /* from kernel */ + /* to mcast group 1<<0 */ + NETLINK_CB(skb).dst_group = 1; + + /*multicast the message to all listening processes*/ + err = netlink_broadcast(shrm_nl_sk, skb, 0, 1, gfp_mask); + dev_dbg(shm_dev->dev, "ret val from nl-multicast = %d\n", err); + +out: + return err; +} + +static void nl_send_unicast_message(int dst_pid) +{ + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh = NULL; + int err; + int bt_state; + unsigned long flags; + + dev_info(shm_dev->dev, "Sending unicast message\n"); + + /* prepare the NL message for unicast */ + skb = alloc_skb(NLMSG_SPACE(MAX_PAYLOAD), GFP_KERNEL); + if (!skb) { + dev_err(shm_dev->dev, "%s:alloc_skb failed\n", __func__); + return; + } + + nlh = (struct nlmsghdr *)skb->data; + nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD); + dev_dbg(shm_dev->dev, "nlh->nlmsg_len = %d\n", nlh->nlmsg_len); + + nlh->nlmsg_pid = 0; /* from kernel */ + nlh->nlmsg_flags = 0; + + spin_lock_irqsave(&boot_lock, flags); + bt_state = boot_state; + spin_unlock_irqrestore(&boot_lock, flags); + + if (bt_state == BOOT_DONE) + *(int *)NLMSG_DATA(nlh) = SHRM_NL_STATUS_MOD_ONLINE; + else + *(int *)NLMSG_DATA(nlh) = SHRM_NL_STATUS_MOD_OFFLINE; + + skb_put(skb, MAX_PAYLOAD); + /* sender is in group 1<<0 */ + NETLINK_CB(skb).pid = 0; /* from kernel */ + NETLINK_CB(skb).dst_group = 0; + + /*unicast the message to the querying processes*/ + err = netlink_unicast(shrm_nl_sk, skb, dst_pid, MSG_DONTWAIT); + dev_dbg(shm_dev->dev, "ret val from nl-unicast = %d\n", err); +} + + +static int check_modem_in_reset(void) +{ + u8 bt_state; + unsigned long flags; + + spin_lock_irqsave(&boot_lock, flags); + bt_state = boot_state; + spin_unlock_irqrestore(&boot_lock, flags); + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET + if (bt_state != BOOT_UNKNOWN) + return 0; + else + return -ENODEV; +#else + /* + * this check won't be applicable and won't work correctly + * if modem-silent-feature is not enabled + * so, simply return 0 + */ + return 0; +#endif +} + +void shm_ca_msgpending_0_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 reader_local_rptr; + u32 reader_local_wptr; + u32 shared_rptr; + u32 config = 0, version = 0; + unsigned long flags; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + /* Interprocess locking */ + spin_lock(&ca_common_lock); + + /* Update_reader_local_wptr with shared_wptr */ + update_ca_common_local_wptr(shrm); + get_reader_pointers(COMMON_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + + set_ca_msg_0_read_notif_send(0); + + if (boot_state == BOOT_DONE) { + shrm_common_rx_state = SHRM_PTR_FREE; + + if (reader_local_rptr != shared_rptr) + ca_msg_read_notification_0(shrm); + if (reader_local_rptr != reader_local_wptr) + receive_messages_common(shrm); + get_reader_pointers(COMMON_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + if (reader_local_rptr == reader_local_wptr) + shrm_common_rx_state = SHRM_IDLE; + } else { + /* BOOT phase.only a BOOT_RESP should be in FIFO */ + if (boot_state != BOOT_INFO_SYNC) { + if (!read_boot_info_req(shrm, &config, &version)) { + dev_err(shrm->dev, + "Unable to read boot state\n"); + BUG(); + } + /* SendReadNotification */ + ca_msg_read_notification_0(shrm); + /* + * Check the version number before + * sending Boot info response + */ + + /* send MsgPending notification */ + write_boot_info_resp(shrm, config, version); + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_INFO_SYNC; + spin_unlock_irqrestore(&boot_lock, flags); + dev_info(shrm->dev, "BOOT_INFO_SYNC\n"); + queue_work(shrm->shm_common_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_0); + } else { + ca_msg_read_notification_0(shrm); + dev_info(shrm->dev, + "BOOT_INFO_SYNC\n"); + } + } + /* Interprocess locking */ + spin_unlock(&ca_common_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ca_msgpending_1_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 reader_local_rptr; + u32 reader_local_wptr; + u32 shared_rptr; + + /* + * This function is called when CaMsgPendingNotification Trigerred + * by CMU. It means that CMU has wrote a message into Ca Audio FIFO + */ + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown\n", + __func__); + return; + } + + /* Interprocess locking */ + spin_lock(&ca_audio_lock); + + /* Update_reader_local_wptr(with shared_wptr) */ + update_ca_audio_local_wptr(shrm); + get_reader_pointers(AUDIO_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + + set_ca_msg_1_read_notif_send(0); + + if (boot_state != BOOT_DONE) { + dev_err(shrm->dev, "Boot Error\n"); + return; + } + shrm_audio_rx_state = SHRM_PTR_FREE; + /* Check we already read the message */ + if (reader_local_rptr != shared_rptr) + ca_msg_read_notification_1(shrm); + if (reader_local_rptr != reader_local_wptr) + receive_messages_audio(shrm); + + get_reader_pointers(AUDIO_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + if (reader_local_rptr == reader_local_wptr) + shrm_audio_rx_state = SHRM_IDLE; + + /* Interprocess locking */ + spin_unlock(&ca_audio_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ac_read_notif_0_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 writer_local_rptr; + u32 writer_local_wptr; + u32 shared_wptr; + unsigned long flags; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + /* Update writer_local_rptrwith shared_rptr */ + update_ac_common_local_rptr(shrm); + get_writer_pointers(COMMON_CHANNEL, &writer_local_rptr, + &writer_local_wptr, &shared_wptr); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown\n", + __func__); + return; + } + + if (boot_state == BOOT_INFO_SYNC) { + /* BOOT_RESP sent by APE has been received by CMT */ + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_DONE; + spin_unlock_irqrestore(&boot_lock, flags); + dev_info(shrm->dev, "IPC_ISA BOOT_DONE\n"); + + if (shrm->msr_flag) { + shrm_start_netdev(shrm->ndev); + shrm->msr_flag = 0; + + /* multicast that modem is online */ + nl_send_multicast_message(SHRM_NL_STATUS_MOD_ONLINE, GFP_ATOMIC); + } + + } else if (boot_state == BOOT_DONE) { + if (writer_local_rptr != writer_local_wptr) { + shrm_common_tx_state = SHRM_PTR_FREE; + queue_work(shrm->shm_common_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_0); + } else { + shrm_common_tx_state = SHRM_IDLE; + shrm_restart_netdev(shrm->ndev); + } + } else { + dev_err(shrm->dev, "Invalid boot state\n"); + } + /* start timer here */ + hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), + HRTIMER_MODE_REL); + atomic_dec(&ac_sleep_disable_count); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ac_read_notif_1_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 writer_local_rptr; + u32 writer_local_wptr; + u32 shared_wptr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown\n", + __func__); + return; + } + + /* Update writer_local_rptr(with shared_rptr) */ + update_ac_audio_local_rptr(shrm); + get_writer_pointers(AUDIO_CHANNEL, &writer_local_rptr, + &writer_local_wptr, &shared_wptr); + if (boot_state != BOOT_DONE) { + dev_err(shrm->dev, "Error Case in boot state\n"); + return; + } + if (writer_local_rptr != writer_local_wptr) { + shrm_audio_tx_state = SHRM_PTR_FREE; + queue_work(shrm->shm_audio_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_1); + } else { + shrm_audio_tx_state = SHRM_IDLE; + } + /* start timer here */ + hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), + HRTIMER_MODE_REL); + atomic_dec(&ac_sleep_disable_count); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ca_sleep_req_work(struct work_struct *work) +{ + dev_dbg(shm_dev->dev, "%s:IRQ_PRCMU_CA_SLEEP\n", __func__); + + shrm_common_rx_state = SHRM_IDLE; + shrm_audio_rx_state = SHRM_IDLE; + + writel((1<intr_base + GOP_SET_REGISTER_BASE); + + hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), + HRTIMER_MODE_REL); +#ifdef CONFIG_UX500_SUSPEND + suspend_unblock_sleep(); +#endif + atomic_dec(&ac_sleep_disable_count); +} + +void shm_ca_wake_req_work(struct work_struct *work) +{ + struct shrm_dev *shrm = container_of(work, + struct shrm_dev, shm_ca_wake_req); + + /* initialize the FIFO Variables */ + if (boot_state == BOOT_INIT) + shm_fifo_init(shrm); + + mutex_lock(&ac_state_mutex); + prcmu_ac_wake_req(); + mutex_unlock(&ac_state_mutex); + + /* send ca_wake_ack_interrupt to CMU */ + if (!get_host_accessport_val()) + BUG(); + writel((1<intr_base + GOP_SET_REGISTER_BASE); +} + +static int shrm_modem_reset_sequence(void) +{ + int err; + unsigned long flags; + + /* + * disable irqs + * very much needed for user-space initiated + * modem-reset + */ + disable_irq_nosync(shm_dev->ac_read_notif_0_irq); + disable_irq_nosync(shm_dev->ac_read_notif_1_irq); + disable_irq_nosync(shm_dev->ca_msg_pending_notif_0_irq); + disable_irq_nosync(shm_dev->ca_msg_pending_notif_1_irq); + disable_irq_nosync(IRQ_PRCMU_CA_WAKE); + disable_irq_nosync(IRQ_PRCMU_CA_SLEEP); + + + /* update the boot_state */ + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_UNKNOWN; + + /* + * put a barrier over here to make sure boot_state is updated + * else, it is seen that some of already executing modem + * irqs or tasklets fail the protocol checks and will ultimately + * try to acces the modem causing system to hang. + * This is particularly seen with user-space initiated modem reset + */ + wmb(); + spin_unlock_irqrestore(&boot_lock, flags); + + hrtimer_cancel(&timer); + + /* reset the state for ac-wake LOW logic */ + atomic_set(&ac_sleep_disable_count, 0); + + /* stop network queue */ + shrm_stop_netdev(shm_dev->ndev); + + /* reset char device queues */ + shrm_char_reset_queues(shm_dev); + + /* reset protocol states */ + shrm_common_tx_state = SHRM_SLEEP_STATE; + shrm_common_rx_state = SHRM_SLEEP_STATE; + shrm_audio_tx_state = SHRM_SLEEP_STATE; + shrm_audio_rx_state = SHRM_SLEEP_STATE; + + /* set the msr flag */ + shm_dev->msr_flag = 1; + + /* multicast that modem is going to reset */ + err = nl_send_multicast_message(SHRM_NL_MOD_RESET, GFP_ATOMIC); + + /* reset the boot state */ + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_INIT; + spin_unlock_irqrestore(&boot_lock, flags); + + /* re-enable irqs */ + enable_irq(shm_dev->ac_read_notif_0_irq); + enable_irq(shm_dev->ac_read_notif_1_irq); + enable_irq(shm_dev->ca_msg_pending_notif_0_irq); + enable_irq(shm_dev->ca_msg_pending_notif_1_irq); + enable_irq(IRQ_PRCMU_CA_WAKE); + enable_irq(IRQ_PRCMU_CA_SLEEP); + + /* reset counter for ac-wake/ac-sleep logic */ + atomic_set(&ac_sleep_disable_count, 0); + + return err; +} + +static void shrm_modem_reset_callback(unsigned long irq) +{ + dev_err(shm_dev->dev, "Received mod_reset_req interrupt\n"); + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET + { + int err; + dev_info(shm_dev->dev, "Initiating Modem silent reset\n"); + + err = shrm_modem_reset_sequence(); + if (err) + dev_err(shm_dev->dev, + "Failed multicast of modem reset\n"); + } +#else + dev_info(shm_dev->dev, "Modem in reset loop, doing System reset\n"); + /* Call the PRCMU reset API */ + prcmu_system_reset(); +#endif +} + +DECLARE_TASKLET(shrm_sw_reset_callback, shrm_modem_reset_callback, + IRQ_PRCMU_MODEM_SW_RESET_REQ); + +static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) +{ + struct shrm_dev *shrm = data; + + switch (irq) { + case IRQ_PRCMU_CA_WAKE: +#ifdef CONFIG_UX500_SUSPEND + suspend_block_sleep(); +#endif + atomic_inc(&ac_sleep_disable_count); + queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_wake_req); + break; + case IRQ_PRCMU_CA_SLEEP: + queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_sleep_req); + break; + case IRQ_PRCMU_MODEM_SW_RESET_REQ: + tasklet_schedule(&shrm_sw_reset_callback); + break; + default: + dev_err(shrm->dev, "%s: => IRQ %d\n", __func__, irq); + return IRQ_NONE; + } + return IRQ_HANDLED; +} + +static void send_ac_msg_pend_notify_0_work(struct work_struct *work) +{ + struct shrm_dev *shrm = container_of(work, struct shrm_dev, + send_ac_msg_pend_notify_0); + + dev_dbg(shrm->dev, "%s IN\n", __func__); + update_ac_common_shared_wptr(shrm); + + mutex_lock(&ac_state_mutex); + atomic_inc(&ac_sleep_disable_count); + prcmu_ac_wake_req(); + mutex_unlock(&ac_state_mutex); + + if (!get_host_accessport_val()) + BUG(); + + /* Trigger AcMsgPendingNotification to CMU */ + writel((1<intr_base + GOP_SET_REGISTER_BASE); + + if (shrm_common_tx_state == SHRM_PTR_FREE) + shrm_common_tx_state = SHRM_PTR_BUSY; + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static void send_ac_msg_pend_notify_1_work(struct work_struct *work) +{ + struct shrm_dev *shrm = container_of(work, struct shrm_dev, + send_ac_msg_pend_notify_1); + + dev_dbg(shrm->dev, "%s IN\n", __func__); + /* Update shared_wptr with writer_local_wptr) */ + update_ac_audio_shared_wptr(shrm); + + mutex_lock(&ac_state_mutex); + atomic_inc(&ac_sleep_disable_count); + prcmu_ac_wake_req(); + mutex_unlock(&ac_state_mutex); + + if (!get_host_accessport_val()) + BUG(); + + /* Trigger AcMsgPendingNotification to CMU */ + writel((1<intr_base + GOP_SET_REGISTER_BASE); + + if (shrm_audio_tx_state == SHRM_PTR_FREE) + shrm_audio_tx_state = SHRM_PTR_BUSY; + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_nl_receive(struct sk_buff *skb) +{ + struct nlmsghdr *nlh = NULL; + int msg; + + dev_dbg(shm_dev->dev, "Received NL msg from user-space\n"); + + nlh = (struct nlmsghdr *)skb->data; + msg = *((int *)(NLMSG_DATA(nlh))); + switch (msg) { + case SHRM_NL_MOD_QUERY_STATE: + dev_info(shm_dev->dev, "mod-query-state from user-space\n"); + nl_send_unicast_message(nlh->nlmsg_pid); + break; + + case SHRM_NL_USER_MOD_RESET: + dev_info(shm_dev->dev, "user-space inited mod-reset-req\n"); + dev_info(shm_dev->dev, "PCRMU resets modem\n"); + prcmu_modem_reset(); + break; + + default: + dev_err(shm_dev->dev, "Invalid NL msg from user-space\n"); + break; + }; +} + +int shrm_protocol_init(struct shrm_dev *shrm, + received_msg_handler common_rx_handler, + received_msg_handler audio_rx_handler) +{ + int err; + + shm_dev = shrm; + boot_state = BOOT_INIT; + dev_info(shrm->dev, "IPC_ISA BOOT_INIT\n"); + rx_common_handler = common_rx_handler; + rx_audio_handler = audio_rx_handler; + atomic_set(&ac_sleep_disable_count, 0); + + is_earlydrop = cpu_is_u8500ed(); + if (is_earlydrop != 0x01) { + hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer.function = callback; + } + + shrm->shm_common_ch_wr_wq = create_singlethread_workqueue + ("shm_common_channel_irq"); + if (!shrm->shm_common_ch_wr_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + return -ENOMEM; + } + shrm->shm_audio_ch_wr_wq = create_singlethread_workqueue + ("shm_audio_channel_irq"); + if (!shrm->shm_audio_ch_wr_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq1; + } + shrm->shm_ac_wake_wq = create_singlethread_workqueue("shm_ac_wake_req"); + if (!shrm->shm_ac_wake_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq2; + } + shrm->shm_ca_wake_wq = create_singlethread_workqueue("shm_ca_wake_req"); + if (!shrm->shm_ac_wake_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq3; + } + shrm->shm_ac_sleep_wq = create_singlethread_workqueue + ("shm_ac_sleep_req"); + if (!shrm->shm_ac_sleep_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq4; + } + INIT_WORK(&shrm->send_ac_msg_pend_notify_0, + send_ac_msg_pend_notify_0_work); + INIT_WORK(&shrm->send_ac_msg_pend_notify_1, + send_ac_msg_pend_notify_1_work); + INIT_WORK(&shrm->shm_ca_wake_req, shm_ca_wake_req_work); + INIT_WORK(&shrm->shm_ca_sleep_req, shm_ca_sleep_req_work); + INIT_WORK(&shrm->shm_ac_sleep_req, shm_ac_sleep_req_work); + + /* set tasklet data */ + shm_ca_0_tasklet.data = (unsigned long)shrm; + shm_ca_1_tasklet.data = (unsigned long)shrm; + + err = request_irq(IRQ_PRCMU_CA_SLEEP, shrm_prcmu_irq_handler, + IRQF_NO_SUSPEND, "ca-sleep", shrm); + if (err < 0) { + dev_err(shm_dev->dev, "Failed alloc IRQ_PRCMU_CA_SLEEP.\n"); + goto free_wq5; + } + + err = request_irq(IRQ_PRCMU_CA_WAKE, shrm_prcmu_irq_handler, + IRQF_NO_SUSPEND, "ca-wake", shrm); + if (err < 0) { + dev_err(shm_dev->dev, "Failed alloc IRQ_PRCMU_CA_WAKE.\n"); + goto drop2; + } + + err = request_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, shrm_prcmu_irq_handler, + IRQF_NO_SUSPEND, "modem-sw-reset-req", shrm); + if (err < 0) { + dev_err(shm_dev->dev, + "Failed alloc IRQ_PRCMU_MODEM_SW_RESET_REQ.\n"); + goto drop1; + } + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET + /* init netlink socket for user-space communication */ + shrm_nl_sk = netlink_kernel_create(NULL, NETLINK_SHRM, 1, + shm_nl_receive, NULL, THIS_MODULE); + + if (!shrm_nl_sk) { + dev_err(shm_dev->dev, "netlink socket creation failed\n"); + goto drop; + } +#endif + + return 0; + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET +drop: + free_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, NULL); +#endif +drop1: + free_irq(IRQ_PRCMU_CA_WAKE, NULL); +drop2: + free_irq(IRQ_PRCMU_CA_SLEEP, NULL); +free_wq5: + destroy_workqueue(shrm->shm_ac_sleep_wq); +free_wq4: + destroy_workqueue(shrm->shm_ca_wake_wq); +free_wq3: + destroy_workqueue(shrm->shm_ac_wake_wq); +free_wq2: + destroy_workqueue(shrm->shm_audio_ch_wr_wq); +free_wq1: + destroy_workqueue(shrm->shm_common_ch_wr_wq); + return err; +} + +void shrm_protocol_deinit(struct shrm_dev *shrm) +{ + free_irq(IRQ_PRCMU_CA_SLEEP, NULL); + free_irq(IRQ_PRCMU_CA_WAKE, NULL); + free_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, NULL); + flush_scheduled_work(); + destroy_workqueue(shrm->shm_common_ch_wr_wq); + destroy_workqueue(shrm->shm_audio_ch_wr_wq); + destroy_workqueue(shrm->shm_ac_wake_wq); + destroy_workqueue(shrm->shm_ca_wake_wq); + destroy_workqueue(shrm->shm_ac_sleep_wq); +} + +int get_ca_wake_req_state(void) +{ + return ((atomic_read(&ac_sleep_disable_count) > 0) || + prcmu_is_ac_wake_requested()); +} + +irqreturn_t ca_wake_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + /* initialize the FIFO Variables */ + if (boot_state == BOOT_INIT) + shm_fifo_init(shrm); + + dev_dbg(shrm->dev, "Inside ca_wake_irq_handler\n"); + + /* Clear the interrupt */ + writel((1 << GOP_CA_WAKE_REQ_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + /* send ca_wake_ack_interrupt to CMU */ + writel((1 << GOP_CA_WAKE_ACK_BIT), + shrm->intr_base + GOP_SET_REGISTER_BASE); + + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + + +irqreturn_t ac_read_notif_0_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + shm_ac_read_0_tasklet.data = (unsigned long)shrm; + tasklet_schedule(&shm_ac_read_0_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1 << GOP_COMMON_AC_READ_NOTIFICATION_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + +irqreturn_t ac_read_notif_1_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN+\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + shm_ac_read_1_tasklet.data = (unsigned long)shrm; + tasklet_schedule(&shm_ac_read_1_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1 << GOP_AUDIO_AC_READ_NOTIFICATION_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + +irqreturn_t ca_msg_pending_notif_0_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + tasklet_schedule(&shm_ca_0_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1 << GOP_COMMON_CA_MSG_PENDING_NOTIFICATION_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + +irqreturn_t ca_msg_pending_notif_1_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + tasklet_schedule(&shm_ca_1_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1<intr_base+GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; + +} + +/** + * shm_write_msg() - write message to shared memory + * @shrm: pointer to the shrm device information structure + * @l2_header: L2 header + * @addr: pointer to the message + * @length: length of the message to be written + * + * This function is called from net or char interface driver write operation. + * Prior to calling this function the message is copied from the user space + * buffer to the kernel buffer. This function based on the l2 header routes + * the message to the respective channel and FIFO. Then makes a call to the + * fifo write function where the message is written to the physical device. + */ +int shm_write_msg(struct shrm_dev *shrm, u8 l2_header, + void *addr, u32 length) +{ + u8 channel = 0; + int ret; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (boot_state != BOOT_DONE) { + dev_err(shrm->dev, + "error after boot done call this fn\n"); + ret = -ENODEV; + goto out; + } + + if ((l2_header == L2_HEADER_ISI) || + (l2_header == L2_HEADER_RPC) || + (l2_header == L2_HEADER_SECURITY) || + (l2_header == L2_HEADER_COMMON_SIMPLE_LOOPBACK) || + (l2_header == L2_HEADER_COMMON_ADVANCED_LOOPBACK)) { + channel = 0; + if (shrm_common_tx_state == SHRM_SLEEP_STATE) + shrm_common_tx_state = SHRM_PTR_FREE; + else if (shrm_common_tx_state == SHRM_IDLE) + shrm_common_tx_state = SHRM_PTR_FREE; + + } else if ((l2_header == L2_HEADER_AUDIO) || + (l2_header == L2_HEADER_AUDIO_SIMPLE_LOOPBACK) || + (l2_header == L2_HEADER_AUDIO_ADVANCED_LOOPBACK)) { + if (shrm_audio_tx_state == SHRM_SLEEP_STATE) + shrm_audio_tx_state = SHRM_PTR_FREE; + else if (shrm_audio_tx_state == SHRM_IDLE) + shrm_audio_tx_state = SHRM_PTR_FREE; + + channel = 1; + } else { + ret = -ENODEV; + goto out; + } + ret = shm_write_msg_to_fifo(shrm, channel, l2_header, addr, length); + if (ret < 0) { + dev_err(shrm->dev, "write message to fifo failed\n"); + return ret; + } + /* + * notify only if new msg copied is the only unread one + * otherwise it means that reading process is ongoing + */ + if (is_the_only_one_unread_message(shrm, channel, length)) { + + /* Send Message Pending Noitication to CMT */ + if (channel == 0) + queue_work(shrm->shm_common_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_0); + else + queue_work(shrm->shm_audio_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_1); + + } + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; + +out: + return ret; +} + +void ca_msg_read_notification_0(struct shrm_dev *shrm) +{ + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (get_ca_msg_0_read_notif_send() == 0) { + update_ca_common_shared_rptr(shrm); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + /* Trigger CaMsgReadNotification to CMU */ + writel((1 << GOP_COMMON_CA_READ_NOTIFICATION_BIT), + shrm->intr_base + GOP_SET_REGISTER_BASE); + set_ca_msg_0_read_notif_send(1); + shrm_common_rx_state = SHRM_PTR_BUSY; + } + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void ca_msg_read_notification_1(struct shrm_dev *shrm) +{ + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (get_ca_msg_1_read_notif_send() == 0) { + update_ca_audio_shared_rptr(shrm); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + /* Trigger CaMsgReadNotification to CMU */ + writel((1<intr_base+GOP_SET_REGISTER_BASE); + set_ca_msg_1_read_notif_send(1); + shrm_audio_rx_state = SHRM_PTR_BUSY; + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +/** + * receive_messages_common - receive common channnel msg from + * CMT(Cellular Mobile Terminal) + * @shrm: pointer to shrm device information structure + * + * The messages sent from CMT to APE are written to the respective FIFO + * and an interrupt is triggered by the CMT. This ca message pending + * interrupt calls this function. This function sends a read notification + * acknowledgement to the CMT and calls the common channel receive handler + * where the messsage is copied to the respective(ISI, RPC, SECURIT) queue + * based on the message l2 header. + */ +void receive_messages_common(struct shrm_dev *shrm) +{ + u8 l2_header; + u32 len; + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_common(shrm, recieve_common_msg, &len); + /* Send Recieve_Call_back to Upper Layer */ + if (!rx_common_handler) { + dev_err(shrm->dev, "common_rx_handler is Null\n"); + BUG(); + } + (*rx_common_handler)(l2_header, &recieve_common_msg, len, + shrm); + /* SendReadNotification */ + ca_msg_read_notification_0(shrm); + + while (read_remaining_messages_common()) { + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_common(shrm, recieve_common_msg, + &len); + /* Send Recieve_Call_back to Upper Layer */ + (*rx_common_handler)(l2_header, + &recieve_common_msg, len, + shrm); + } +} + +/** + * receive_messages_audio() - receive audio message from CMT + * @shrm: pointer to shrm device information structure + * + * The messages sent from CMT to APE are written to the respective FIFO + * and an interrupt is triggered by the CMT. This ca message pending + * interrupt calls this function. This function sends a read notification + * acknowledgement to the CMT and calls the common channel receive handler + * where the messsage is copied to the audio queue. + */ +void receive_messages_audio(struct shrm_dev *shrm) +{ + u8 l2_header; + u32 len; + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_audio(shrm, recieve_audio_msg, &len); + /* Send Recieve_Call_back to Upper Layer */ + + if (!rx_audio_handler) { + dev_crit(shrm->dev, "audio_rx_handler is Null\n"); + BUG(); + } + (*rx_audio_handler)(l2_header, &recieve_audio_msg, + len, shrm); + + /* SendReadNotification */ + ca_msg_read_notification_1(shrm); + while (read_remaining_messages_audio()) { + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_audio(shrm, + recieve_audio_msg, &len); + /* Send Recieve_Call_back to Upper Layer */ + (*rx_audio_handler)(l2_header, + &recieve_audio_msg, len, + shrm); + } +} + +u8 get_boot_state() +{ + return boot_state; +} diff --git a/drivers/net/Makefile b/drivers/net/Makefile index e1eca2ab505..304c2e1926e 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -306,3 +306,7 @@ obj-$(CONFIG_CAIF) += caif/ obj-$(CONFIG_OCTEON_MGMT_ETHERNET) += octeon/ obj-$(CONFIG_PCH_GBE) += pch_gbe/ obj-$(CONFIG_TILE_NET) += tile/ + +ifdef CONFIG_PHONET +obj-$(CONFIG_U8500_SHRM) += u8500_shrm.o +endif diff --git a/drivers/net/u8500_shrm.c b/drivers/net/u8500_shrm.c new file mode 100644 index 00000000000..55983a59761 --- /dev/null +++ b/drivers/net/u8500_shrm.c @@ -0,0 +1,336 @@ +/* + * Copyright (C) ST-Ericsson SA 2009 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghvi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +static u8 wr_isi_msg[10*1024]; + +/** + * shrm_net_receive() - receive data and copy to user space buffer + * @dev: pointer to the network device structure + * @data: pointer to the receive buffer + * + * Copy data from ISI queue to the user space buffer. + */ +int shrm_net_receive(struct net_device *dev, u8 *data) +{ + struct sk_buff *skb; + struct isadev_context *isadev; + struct message_queue *q; + u32 msgsize; + u32 size = 0; + struct shrm_net_iface_priv *net_iface_priv = + (struct shrm_net_iface_priv *)netdev_priv(dev); + struct shrm_dev *shrm = net_iface_priv->shrm_device; + + if (data == NULL) + goto out; + + isadev = &shrm->isa_context->isadev[ISI_MESSAGING]; + q = &isadev->dl_queue; + + spin_lock_bh(&q->update_lock); + if (list_empty(&q->msg_list)) { + spin_unlock_bh(&q->update_lock); + dev_dbg(shrm->dev, "Empty Shrm queue\n"); + return 0; + } + spin_unlock_bh(&q->update_lock); + + msgsize = get_size_of_new_msg(q); + if (msgsize <= 0) + return msgsize; + + if ((q->readptr+msgsize) >= q->size) { + size = (q->size-q->readptr); + /*Copy First Part of msg*/ + memcpy(data, + (u8 *)(q->fifo_base + q->readptr), size); + /*Copy Second Part of msg at the top of fifo*/ + memcpy(data+size, + (u8 *)(q->fifo_base), (msgsize - size)); + } else { + memcpy(data, + (u8 *)(q->fifo_base+q->readptr), msgsize); + } + + spin_lock_bh(&q->update_lock); + remove_msg_from_queue(q); + spin_unlock_bh(&q->update_lock); + + dev_dbg(shrm->dev, "Data len at shrm_net_receive: %d\n", msgsize); + + /* + * The packet has been retrieved from the transmission + * medium. Build an skb around it, so upper layers can handle it + */ + + skb = dev_alloc_skb(msgsize); + if (!skb) { + if (printk_ratelimit()) + dev_notice(shrm->dev, + "isa rx: low on mem - packet dropped\n"); + dev->stats.rx_dropped++; + goto out; + } + skb_copy_to_linear_data(skb, data, msgsize); + skb_put(skb, msgsize); + skb_reset_mac_header(skb); + __skb_pull(skb, dev->hard_header_len); + /*Write metadata, and then pass to the receive level*/ + skb->dev = dev;/*kmalloc(sizeof(struct net_device), GFP_ATOMIC);*/ + skb->protocol = htons(ETH_P_PHONET); + skb->priority = 0; + skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ + if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) { + dev->stats.rx_packets++; + dev->stats.rx_bytes += msgsize; + } else + dev->stats.rx_dropped++; + + return msgsize; +out: + return -ENOMEM; +} + +static int netdev_isa_open(struct net_device *dev) +{ + struct shrm_net_iface_priv *net_iface_priv = + (struct shrm_net_iface_priv *)netdev_priv(dev); + struct shrm_dev *shrm = net_iface_priv->shrm_device; + + shrm->netdev_flag_up = 1; + if (!netif_carrier_ok(dev)) + netif_carrier_on(dev); + netif_wake_queue(dev); + return 0; +} + +static int netdev_isa_close(struct net_device *dev) +{ + struct shrm_net_iface_priv *net_iface_priv = + (struct shrm_net_iface_priv *)netdev_priv(dev); + struct shrm_dev *shrm = net_iface_priv->shrm_device; + + shrm->netdev_flag_up = 0; + netif_stop_queue(dev); + netif_carrier_off(dev); + return 0; +} + +static int netdev_isa_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct if_phonet_req *req = (struct if_phonet_req *)ifr; + + switch (cmd) { + case SIOCPNGAUTOCONF: + req->ifr_phonet_autoconf.device = PN_DEV_HOST; + return 0; + } + return -ENOIOCTLCMD; +} + +static struct net_device_stats *netdev_isa_stats(struct net_device *dev) +{ + return &dev->stats; +} + +/** + * netdev_isa_write() - write through the net interface + * @skb: pointer to the socket buffer + * @dev: pointer to the network device structure + * + * Copies data(ISI message) from the user buffer to the kernel buffer and + * schedule transfer thread to transmit the message to the modem via FIFO. + */ +static netdev_tx_t netdev_isa_write(struct sk_buff *skb, struct net_device *dev) +{ + int err; + int retval = 0; + struct shrm_net_iface_priv *net_iface_priv = + (struct shrm_net_iface_priv *)netdev_priv(dev); + struct shrm_dev *shrm = net_iface_priv->shrm_device; + + /* + * FIXME: + * U8500 modem requires that Pipe created/enabled Indication should + * be sent from the port corresponding to GPRS socket. + * Also, the U8500 modem does not implement Pipe controller + * which takes care of port manipulations for GPRS traffic. + * + * Now, APE has GPRS socket and the socket for sending + * Indication msgs bound to different ports. + * Phonet stack does not allow an indication msg to be sent + * from GPRS socket, since Phonet stack assumes the presence + * of Pipe controller in modem. + * + * So, due to lack of Pipe controller implementation in the + * U8500 modem, carry out the port manipulation related to + * GPRS traffic here. + * Ideally, it should be done either by Pipe controller in + * modem OR some implementation of Pipe controller on APE side + */ + if (skb->data[RESOURCE_ID_INDEX] == PN_PIPE) { + if ((skb->data[MSG_ID_INDEX] == PNS_PIPE_CREATED_IND) || + (skb->data[MSG_ID_INDEX] == PNS_PIPE_ENABLED_IND) || + (skb->data[MSG_ID_INDEX] == PNS_PIPE_DISABLED_IND)) + skb->data[SRC_OBJ_INDEX] = skb->data[PIPE_HDL_INDEX]; + } + + if ((void *)wr_isi_msg != + memcpy((void *)wr_isi_msg, skb->data, skb->len)) { + dev_err(shrm->dev, "memcpy failed\n"); + dev_kfree_skb(skb); + return -EFAULT; + } + + spin_lock_bh(&shrm->isa_context->common_tx); + err = shm_write_msg(shrm, ISI_MESSAGING, (void *)wr_isi_msg, + skb->len); + if (!err) { + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + retval = NETDEV_TX_OK; + dev_kfree_skb(skb); + } else { + dev->stats.tx_dropped++; + retval = NETDEV_TX_BUSY; + } + spin_unlock_bh(&shrm->isa_context->common_tx); + + return retval; +} + +static const struct net_device_ops shrm_netdev_ops = { + .ndo_open = netdev_isa_open, + .ndo_stop = netdev_isa_close, + .ndo_do_ioctl = netdev_isa_ioctl, + .ndo_start_xmit = netdev_isa_write, + .ndo_get_stats = netdev_isa_stats, +}; + +static void shm_net_init(struct net_device *dev) +{ + struct shrm_net_iface_priv *net_iface_priv; + + dev->netdev_ops = &shrm_netdev_ops; + dev->header_ops = &phonet_header_ops; + dev->type = ARPHRD_PHONET; + dev->flags = IFF_POINTOPOINT | IFF_NOARP; + dev->mtu = PHONET_MAX_MTU; + dev->hard_header_len = SHRM_HLEN; + dev->addr_len = PHONET_ALEN; + dev->tx_queue_len = PN_TX_QUEUE_LEN; + dev->destructor = free_netdev; + dev->dev_addr[0] = PN_LINK_ADDR; + net_iface_priv = netdev_priv(dev); + memset(net_iface_priv, 0 , sizeof(struct shrm_net_iface_priv)); +} + +int shrm_register_netdev(struct shrm_dev *shrm) +{ + struct net_device *nw_device; + struct shrm_net_iface_priv *net_iface_priv; + char *devname = "shrm%d"; + int err; + + /* allocate the net device */ + nw_device = shrm->ndev = alloc_netdev( + sizeof(struct shrm_net_iface_priv), + devname, shm_net_init); + if (nw_device == NULL) { + dev_err(shrm->dev, "Failed to allocate SHRM Netdev\n"); + return -ENOMEM; + } + err = register_netdev(shrm->ndev); + if (err) { + dev_err(shrm->dev, "Err %i in reg shrm-netdev\n", err); + free_netdev(shrm->ndev); + return -ENODEV; + } + dev_info(shrm->dev, "Registered shrm netdev\n"); + + net_iface_priv = (struct shrm_net_iface_priv *)netdev_priv(nw_device); + net_iface_priv->shrm_device = shrm; + net_iface_priv->iface_num = 0; + + return err; +} + +int shrm_stop_netdev(struct net_device *dev) +{ + struct shrm_net_iface_priv *net_iface_priv = + (struct shrm_net_iface_priv *)netdev_priv(dev); + + netif_stop_queue(dev); + return 0; +} + +int shrm_restart_netdev(struct net_device *dev) +{ + struct shrm_net_iface_priv *net_iface_priv = + (struct shrm_net_iface_priv *)netdev_priv(dev); + + if (netif_queue_stopped(dev)) + netif_wake_queue(dev); + return 0; +} + +int shrm_start_netdev(struct net_device *dev) +{ + struct shrm_net_iface_priv *net_iface_priv = + (struct shrm_net_iface_priv *)netdev_priv(dev); + struct shrm_dev *shrm = net_iface_priv->shrm_device; + + if (!netif_carrier_ok(dev)) + netif_carrier_on(dev); + netif_start_queue(dev); + shrm->netdev_flag_up = 1; + return 0; +} + +int shrm_suspend_netdev(struct net_device *dev) +{ + if (netif_running(dev)) { + netif_stop_queue(dev); + netif_carrier_off(dev); + } + netif_device_detach(dev); + + return 0; +} + +int shrm_resume_netdev(struct net_device *dev) +{ + netif_device_attach(dev); + if (netif_running(dev)) { + netif_carrier_on(dev); + netif_wake_queue(dev); + } + + return 0; +} + +void shrm_unregister_netdev(struct shrm_dev *shrm) +{ + unregister_netdev(shrm->ndev); +} -- cgit v1.2.3 From fee546f1770592409bec116e0d6eee2bc081e1fa Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Thu, 20 Oct 2011 10:22:50 +0200 Subject: modem: add mloader and trace features Signed-off-by: Philippe Langlais --- arch/arm/mach-ux500/include/mach/mloader-dbx500.h | 48 ++++ arch/arm/mach-ux500/mloader-db8500.c | 82 +++++++ drivers/misc/db8500-modem-trace.c | 273 ++++++++++++++++++++++ drivers/misc/dbx500-mloader.c | 269 +++++++++++++++++++++ include/linux/db8500-modem-trace.h | 24 ++ include/linux/mloader.h | 25 ++ 6 files changed, 721 insertions(+) create mode 100644 arch/arm/mach-ux500/include/mach/mloader-dbx500.h create mode 100644 arch/arm/mach-ux500/mloader-db8500.c create mode 100644 drivers/misc/db8500-modem-trace.c create mode 100644 drivers/misc/dbx500-mloader.c create mode 100644 include/linux/db8500-modem-trace.h create mode 100644 include/linux/mloader.h diff --git a/arch/arm/mach-ux500/include/mach/mloader-dbx500.h b/arch/arm/mach-ux500/include/mach/mloader-dbx500.h new file mode 100644 index 00000000000..68fa55a3f53 --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/mloader-dbx500.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Author: Ludovic Barre for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2 + */ + +#ifndef _MLOADER_UX500_H_ +#define _MLOADER_UX500_H_ + +/** + * struct dbx500_ml_area - data structure for modem memory areas description + * @name: name of the area + * @start: start address of the area + * @size: size of the area + */ +struct dbx500_ml_area { + const char *name; + u32 start; + u32 size; +}; + +/** + * struct dbx500_ml_fw - data stucture for modem firmwares description + * @name: firmware name + * @area: area where firmware is uploaded + * @offset: offset in the area where firmware is uploaded + */ +struct dbx500_ml_fw { + const char *name; + struct dbx500_ml_area *area; + u32 offset; +}; + +/** + * struct dbx500_mloader_pdata - data structure for platform specific data + * @fws: pointer on firmwares table + * @nr_fws: number of firmwares + * @areas: pointer on areas table + * @nr_areas: number of areas + */ +struct dbx500_mloader_pdata { + struct dbx500_ml_fw *fws; + int nr_fws; + struct dbx500_ml_area *areas; + int nr_areas; +}; + +#endif /* _MLOADER_UX500_H_ */ diff --git a/arch/arm/mach-ux500/mloader-db8500.c b/arch/arm/mach-ux500/mloader-db8500.c new file mode 100644 index 00000000000..6171a9db82f --- /dev/null +++ b/arch/arm/mach-ux500/mloader-db8500.c @@ -0,0 +1,82 @@ +/* + * Copyright (C) 2011 ST-Ericsson + * + * Author: Maxime Coquelin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + */ +#include +#include + +#include + +static struct dbx500_ml_area modem_areas[] = { + { .name = "modem_trace", .start = 0x6000000, .size = 0xf00000 }, + { .name = "modem_shared", .start = 0x6f00000, .size = 0x100000 }, + { .name = "modem_priv", .start = 0x7000000, .size = 0x1000000 }, +}; + +static struct dbx500_ml_fw modem_fws[] = { + { .name = "MODEM", .area = &modem_areas[0], .offset = 0x0 }, + { .name = "IPL", .area = &modem_areas[1], .offset = 0x00 }, +}; + +static struct dbx500_mloader_pdata mloader_fw_data = { + .fws = modem_fws, + .nr_fws = ARRAY_SIZE(modem_fws), + .areas = modem_areas, + .nr_areas = ARRAY_SIZE(modem_areas), +}; + +struct platform_device mloader_fw_device = { + .name = "dbx500_mloader_fw", + .id = -1, + .dev = { + .platform_data = &mloader_fw_data, + }, + .num_resources = 0, +}; + +/* Default areas can be overloaded in cmdline */ +static int __init early_modem_priv(char *p) +{ + struct dbx500_ml_area *area = &modem_areas[2]; + + area->size = memparse(p, &p); + + if (*p == '@') + area->start = memparse(p + 1, &p); + + return 0; +} +early_param("mem_modem", early_modem_priv); + +static int __init early_modem_shared(char *p) +{ + struct dbx500_ml_area *area = &modem_areas[1]; + + area->size = memparse(p, &p); + + if (*p == '@') + area->start = memparse(p + 1, &p); + + return 0; +} +early_param("mem_mshared", early_modem_shared); + +static int __init early_modem_trace(char *p) +{ + struct dbx500_ml_area *area = &modem_areas[0]; + + area->size = memparse(p, &p); + + if (*p == '@') + area->start = memparse(p + 1, &p); + + return 0; +} +early_param("mem_mtrace", early_modem_trace); + diff --git a/drivers/misc/db8500-modem-trace.c b/drivers/misc/db8500-modem-trace.c new file mode 100644 index 00000000000..0d739fb4694 --- /dev/null +++ b/drivers/misc/db8500-modem-trace.c @@ -0,0 +1,273 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Authors: Michel JAOUEN + * Maxime COQUELIN + * for ST-Ericsson + * License terms: GNU General Public License (GPL), version 2 + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define DEVICE_NAME "db8500-modem-trace" + +/* activation of this flag triggers an initialization of 2 buffers + * 4kbytes , id 0xdeadbeef + * and 16Kbytes id 0xfadafada + * we assume that platform provides minimum 20Kbytes. */ + +struct trace { + u32 start; + u32 end; + u32 mdm_base; + u32 ape_base; + void __iomem *area; + /* this spinlock to forbid concurrent access on the same trace buffer */ + spinlock_t lock; + struct device *dev; + struct miscdevice misc_dev; +}; + +struct trace_modem { + u32 phys_addr; + u8 filler; +}; + +static struct trace *trace_priv; + + +/* all this definition are linked to modem interface */ +#define MODEM_MARKER 0x88 +/* free marker is also written on filler */ +#define FREE_MARKER 0xa5 +#define FREE_MARKER_2 0xa5a5 +#define READ_MARKER 0x5a + +struct buffer_header { + u8 pattern; + u8 filler; + u16 head_size; +}; + + +static int trace_read(unsigned long arg) +{ + struct modem_trace_req req; + struct buffer_header *pt; + char tmp_char; + + if (copy_from_user(&req, (struct modem_trace_req *)arg, + sizeof(struct modem_trace_req))) + return -EFAULT; + + /* compute Modem physical address to APE physical address range */ + if (req.phys_addr < trace_priv->mdm_base) { + dev_err(trace_priv->dev, "MODEM ADDR uncorrect\n"); + return -EINVAL; + } + req.phys_addr += trace_priv->ape_base - trace_priv->mdm_base; + + /* check request is in the range and aligned */ + if ((req.phys_addr % 4 != 0) + || (req.phys_addr < trace_priv->start) + || (req.phys_addr + req.size) >= trace_priv->end) { + dev_err(trace_priv->dev, "req out of range %x %x\n", + req.phys_addr, req.size); + return -EINVAL; + } + + /* perform access to memory area */ + pt = (struct buffer_header *)((u32)trace_priv->area + + req.phys_addr - trace_priv->start); + + /* in case of several request coming on same trace buffer take a + * spinlock */ + spin_lock(&trace_priv->lock); + if (pt->pattern != MODEM_MARKER) { + /* pattern and size not matching */ + dev_err(trace_priv->dev, "req not matching filler %x/%x \ + or/and pattern %x\n", req.filler, pt->filler, + pt->pattern); + spin_unlock(&trace_priv->lock); + return -EINVAL; + } + /* mark pattern as read and unlock spin */ + pt->pattern = READ_MARKER; + spin_unlock(&trace_priv->lock); + + req.size -= copy_to_user(req.buff, pt, req.size); + + pt->pattern = FREE_MARKER; + pt->filler = FREE_MARKER; + tmp_char = MODEM_MARKER; + + /* Update marker for trace tool */ + if (copy_to_user(req.buff, &tmp_char, 1)) + return -EFAULT; + + /* Update effective written size */ + if (copy_to_user((struct modem_trace_req *)arg, &req, + sizeof(struct modem_trace_req))) + return -EFAULT; + + return 0; +} + +static int trace_mmapdump(struct file *file, struct vm_area_struct *vma) +{ + unsigned long vma_start = vma->vm_start; + + if (vma->vm_flags & VM_WRITE) + return -EPERM; + + if ((vma->vm_end - vma->vm_start) < + (trace_priv->end - trace_priv->start)) + return -EINVAL; + if (remap_pfn_range(vma, + vma_start, + trace_priv->start >> PAGE_SHIFT, + trace_priv->end - trace_priv->start, + vma->vm_page_prot)) + return -EAGAIN; + return 0; +} + +static long trace_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + long ret = 0; + void __user *argp = (void __user *)arg; + unsigned long size = trace_priv->end-trace_priv->start; + + switch (cmd) { + case TM_GET_DUMPINFO: + ret = put_user(size, (unsigned long *)argp); + break; + case TM_TRACE_REQ: + ret = trace_read(arg); + break; + + default: + ret = -EPERM; + break; + } + return ret; +} + +static const struct file_operations trace_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = trace_ioctl, + .mmap = trace_mmapdump +}; + +static int trace_probe(struct platform_device *pdev) +{ + int rv = 0; + struct db8500_trace_platform_data *pdata = pdev->dev.platform_data; + /* retrieve area descriptor from platform device ressource */ + struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + if ((mem->start == 0) && (mem->end == 0)) { + rv = -EINVAL; + goto out; + } + + if ((pdata->ape_base == 0) || (pdata->modem_base == 0)) { + rv = -EINVAL; + goto out; + } + + trace_priv = kzalloc(sizeof(*trace_priv), GFP_ATOMIC); + if (!trace_priv) { + rv = -ENOMEM; + goto out; + } + + trace_priv->dev = &pdev->dev; + trace_priv->misc_dev.minor = MISC_DYNAMIC_MINOR; + trace_priv->misc_dev.name = DEVICE_NAME; + trace_priv->misc_dev.fops = &trace_fops; + trace_priv->area = (void __iomem *)ioremap_nocache(mem->start, + mem->end - mem->start); + if (!trace_priv->area) { + rv = -ENOMEM; + goto outfree; + } + + trace_priv->start = mem->start; + trace_priv->end = mem->end; + + trace_priv->mdm_base = pdata->modem_base; + trace_priv->ape_base = pdata->ape_base; + + /* spin allowing smp access for reading/writing trace buffer header */ + spin_lock_init(&trace_priv->lock); + + rv = misc_register(&trace_priv->misc_dev); + if (rv) { + dev_err(&pdev->dev, "can't misc_register\n"); + goto outunmap; + } + + return rv; + +outunmap: + iounmap(trace_priv->area); +outfree: + kfree(trace_priv); +out: + return rv; + +} + +static int trace_remove(struct platform_device *pdev) +{ + int rv = 0; + + if (trace_priv) { + rv = misc_deregister(&trace_priv->misc_dev); + iounmap(trace_priv->area); + kfree(trace_priv); + } + + return rv; +} + +static struct platform_driver trace_driver = { + .probe = trace_probe, + .remove = trace_remove, + .driver = { + .name = "db8500-modem-trace", + .owner = THIS_MODULE, + }, +}; + +static int trace_init(void) +{ + platform_driver_register(&trace_driver); + return 0; +} +static void trace_exit(void) +{ + platform_driver_unregister(&trace_driver); +} +module_init(trace_init); +module_exit(trace_exit); + +MODULE_AUTHOR("ST-Ericsson"); +MODULE_LICENSE("GPL"); diff --git a/drivers/misc/dbx500-mloader.c b/drivers/misc/dbx500-mloader.c new file mode 100644 index 00000000000..c3ec8b67983 --- /dev/null +++ b/drivers/misc/dbx500-mloader.c @@ -0,0 +1,269 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Author: Ludovic Barre for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define DEVICE_NAME "dbx500_mloader_fw" + +struct mloader_priv { + struct platform_device *pdev; + struct dbx500_mloader_pdata *pdata; + struct miscdevice misc_dev; + u32 aeras_size; +}; + +static struct mloader_priv *mloader_priv; + +static int mloader_fw_send(struct dbx500_ml_fw *fw_info) +{ + const struct firmware *fw; + unsigned long size; + unsigned long phys_start; + void *fw_data; + void *vaddr; + void __iomem *ioaddr; + int ret; + + ret = request_firmware(&fw, fw_info->name, &mloader_priv->pdev->dev); + if (ret) { + dev_err(&mloader_priv->pdev->dev, "request firmware failed\n"); + goto out; + } + + if (fw->size > (fw_info->area->size - fw_info->offset)) { + dev_err(&mloader_priv->pdev->dev, + "fw:%s is too big for:%s\n", + fw_info->name, fw_info->area->name); + ret = -EINVAL; + goto err_fw; + } + + size = PAGE_ALIGN(fw->size); + phys_start = fw_info->area->start + fw_info->offset; + phys_start &= PAGE_MASK; + ioaddr = ioremap(phys_start, size); + if (!ioaddr) { + dev_err(&mloader_priv->pdev->dev, + "failed remap memory region.\n"); + ret = -EINVAL; + goto err_fw; + } + + vaddr = ioaddr + (fw_info->offset & ~PAGE_MASK); + fw_data = (void *)fw->data; + memcpy_toio(vaddr, fw_data, fw->size); + iounmap(ioaddr); + +err_fw: + release_firmware(fw); +out: + return ret; +} + +static int mloader_fw_upload(void) +{ + int i, ret; + struct dbx500_mloader_pdata *pdata = mloader_priv->pdata; + + for (i = 0; i < pdata->nr_fws; i++) { + ret = mloader_fw_send(&pdata->fws[i]); + if (ret) + goto err; + } + + return 0; +err: + dev_err(&mloader_priv->pdev->dev, + "Failed to upload %s firmware", pdata->fws[i].name); + return ret; +} + +static int mloader_fw_mmapdump(struct file *file, struct vm_area_struct *vma) +{ + int i; + unsigned long dump_size = 0; + unsigned long vma_start = vma->vm_start; + + if (vma->vm_flags & VM_WRITE) + return -EPERM; + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) + dump_size += mloader_priv->pdata->areas[i].size; + + if ((vma->vm_end - vma->vm_start) < dump_size) + return -EINVAL; + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) { + if (remap_pfn_range(vma, + vma_start, + mloader_priv->pdata->areas[i].start >> PAGE_SHIFT, + mloader_priv->pdata->areas[i].size, + vma->vm_page_prot)) + return -EAGAIN; + vma_start += mloader_priv->pdata->areas[i].size; + } + return 0; +} + +static void mloader_fw_dumpinfo(struct dump_image *images) +{ + u32 offset = 0; + int i; + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) { + strncpy(images[i].name, + mloader_priv->pdata->areas[i].name, MAX_NAME); + images[i].name[MAX_NAME-1] = 0; + images[i].offset = offset; + images[i].size = mloader_priv->pdata->areas[i].size; + offset += mloader_priv->pdata->areas[i].size; + } +} + +static long mloader_fw_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + long ret = 0; + void __user *argp = (void __user *)arg; + + switch (cmd) { + case ML_UPLOAD: + ret = mloader_fw_upload(); + break; + case ML_GET_NBIMAGES: + ret = put_user(mloader_priv->pdata->nr_areas, + (unsigned long __user *)argp); + break; + case ML_GET_DUMPINFO: { + struct dump_image *dump_images; + dump_images = kzalloc(mloader_priv->pdata->nr_areas + * sizeof(struct dump_image), GFP_ATOMIC); + mloader_fw_dumpinfo(dump_images); + ret = copy_to_user(argp, (void *) dump_images, + mloader_priv->pdata->nr_areas + * sizeof(struct dump_image)) ? -EFAULT : 0; + kfree(dump_images); + break; + } + default: + ret = -EPERM; + break; + } + + return ret; +} + +static const struct file_operations modem_fw_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = mloader_fw_ioctl, + .mmap = mloader_fw_mmapdump, +}; + +static int __devinit mloader_fw_probe(struct platform_device *pdev) +{ + int ret = 0; + int i; + + mloader_priv = kzalloc(sizeof(*mloader_priv), GFP_ATOMIC); + if (!mloader_priv) { + ret = -ENOMEM; + goto out; + } + + mloader_priv->pdev = pdev; + mloader_priv->pdata = pdev->dev.platform_data; + + mloader_priv->misc_dev.minor = MISC_DYNAMIC_MINOR; + mloader_priv->misc_dev.name = DEVICE_NAME; + mloader_priv->misc_dev.fops = &modem_fw_fops; + ret = misc_register(&mloader_priv->misc_dev); + if (ret < 0) { + dev_err(&pdev->dev, "can't misc_register\n"); + goto err_free_priv; + } + + dev_info(&mloader_priv->pdev->dev, "mloader device register\n"); + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) { + dev_dbg(&mloader_priv->pdev->dev, + "Area:%d (name:%s start:%x size:%x)\n", + i, mloader_priv->pdata->areas[i].name, + mloader_priv->pdata->areas[i].start, + mloader_priv->pdata->areas[i].size); + } + + for (i = 0 ; i < mloader_priv->pdata->nr_fws ; i++) { + dev_dbg(&mloader_priv->pdev->dev, + "Firmware:%d (name:%s offset:%x " + "area_name:%s area_start:%x area_size:%x)\n", + i, mloader_priv->pdata->fws[i].name, + mloader_priv->pdata->fws[i].offset, + mloader_priv->pdata->fws[i].area->name, + mloader_priv->pdata->fws[i].area->start, + mloader_priv->pdata->fws[i].area->size); + } + + return ret; + +err_free_priv: + kfree(mloader_priv); +out: + return ret; +} + +static int __devexit mloader_fw_remove(struct platform_device *pdev) +{ + int err; + + err = misc_register(&mloader_priv->misc_dev); + if (err < 0) + dev_err(&pdev->dev, "can't misc_deregister, %d\n", err); + + kfree(mloader_priv); + + return err; +} + +static struct platform_driver mloader_fw_driver = { + .driver.name = DEVICE_NAME, + .driver.owner = THIS_MODULE, + .probe = mloader_fw_probe, + .remove = __devexit_p(mloader_fw_remove), +}; + +static int __init mloader_fw_init(void) +{ + return platform_driver_register(&mloader_fw_driver); +} + +static void __exit mloader_fw_exit(void) +{ + kfree(mloader_priv); + platform_driver_unregister(&mloader_fw_driver); +} + +module_init(mloader_fw_init); +module_exit(mloader_fw_exit); +MODULE_DESCRIPTION("ST-Ericsson modem loader firmware"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Ludovic Barre "); diff --git a/include/linux/db8500-modem-trace.h b/include/linux/db8500-modem-trace.h new file mode 100644 index 00000000000..4863e1a0b03 --- /dev/null +++ b/include/linux/db8500-modem-trace.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Authors: Michel JAOUEN + * Maxime COQUELIN + * for ST-Ericsson + * License terms: GNU General Public License (GPL), version 2 + */ +/* macro for requesting a trace read */ + +struct modem_trace_req { + __u32 phys_addr; + __u8 filler; + __u8 *buff; + __u32 size; +}; + +#define TM_IO_NUMBER 0xfc +#define TM_GET_DUMPINFO _IOR(TM_IO_NUMBER, 1, unsigned long) +#define TM_TRACE_REQ _IOWR(TM_IO_NUMBER, 2, unsigned long) + +struct db8500_trace_platform_data { + unsigned long ape_base; + unsigned long modem_base; +}; diff --git a/include/linux/mloader.h b/include/linux/mloader.h new file mode 100644 index 00000000000..ceca3245856 --- /dev/null +++ b/include/linux/mloader.h @@ -0,0 +1,25 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Author: Ludovic Barre for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2 + */ + +#ifndef _MLOADER_H_ +#define _MLOADER_H_ + +/* not use in ioctl-number.txt */ +#define ML_IO_NUMBER 0xFE + +#define ML_UPLOAD _IO(ML_IO_NUMBER, 1) +#define ML_GET_NBIMAGES _IOR(ML_IO_NUMBER, 2, int) +#define ML_GET_DUMPINFO _IOR(ML_IO_NUMBER, 3, struct dump_image*) + +#define MAX_NAME 16 + +struct dump_image { + char name[MAX_NAME]; + unsigned int offset; + unsigned int size; +}; + +#endif /* _MLOADER_H_ */ -- cgit v1.2.3 From 364232feb31251df894e5251162cffabd7adefdc Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Wed, 6 Apr 2011 09:39:29 +0200 Subject: shrm: Fix compilation pb after 2.6.38 merge, change ioctl to unlocked_ioctl Signed-off-by: Philippe Langlais --- arch/arm/mach-ux500/include/mach/isa_ioctl.h | 51 ++++++++++++++++++++++++++++ drivers/char/shrm_char.c | 9 +++-- 2 files changed, 55 insertions(+), 5 deletions(-) create mode 100644 arch/arm/mach-ux500/include/mach/isa_ioctl.h diff --git a/arch/arm/mach-ux500/include/mach/isa_ioctl.h b/arch/arm/mach-ux500/include/mach/isa_ioctl.h new file mode 100644 index 00000000000..b05726f8c3c --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/isa_ioctl.h @@ -0,0 +1,51 @@ +/*---------------------------------------------------------------------------*/ +/* Copyright ST Ericsson, 2009. */ +/* This program is free software; you can redistribute it and/or modify it */ +/* under the terms of the GNU General Public License as published by the */ +/* Free Software Foundation; either version 2.1 of the License, or */ +/* (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, but */ +/* WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */ +/* See the GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with this program. If not, see . */ +/*---------------------------------------------------------------------------*/ +#ifndef __MODEM_IPC_INCLUDED +#define __MODEM_IPC_INCLUDED + +#define DLP_IOCTL_MAGIC_NUMBER 'M' +#define COMMON_BUFFER_SIZE (1024*1024) + +/** +DLP Message Structure for Userland +*/ +struct t_dlp_message{ + unsigned int offset; + unsigned int size; +}; + +/** +mmap constants. +*/ +enum t_dlp_mmap_params { + MMAP_DLQUEUE, + MMAP_ULQUEUE +}; + +/** +DLP IOCTLs for Userland +*/ +#define DLP_IOC_ALLOCATE_BUFFER \ + _IOWR(DLP_IOCTL_MAGIC_NUMBER, 0, struct t_dlp_message *) +#define DLP_IOC_DEALLOCATE_BUFFER \ + _IOWR(DLP_IOCTL_MAGIC_NUMBER, 1, struct t_dlp_message *) +#define DLP_IOC_GET_MESSAGE \ + _IOWR(DLP_IOCTL_MAGIC_NUMBER, 2, struct t_dlp_message *) +#define DLP_IOC_PUT_MESSAGE \ + _IOWR(DLP_IOCTL_MAGIC_NUMBER, 3, struct t_dlp_message *) + +#endif /*__MODEM_IPC_INCLUDED*/ + diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c index 256add7cdb8..2890f152d2d 100644 --- a/drivers/char/shrm_char.c +++ b/drivers/char/shrm_char.c @@ -527,13 +527,12 @@ ssize_t isa_write(struct file *filp, const char __user *buf, * downlink message once the message is copied. Message is copied from offset * location returned by previous ioctl before calling this ioctl. */ -static int isa_ioctl(struct inode *inode, struct file *filp, - unsigned cmd, unsigned long arg) +static long isa_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { - int err = 0; + long err = 0; struct isadev_context *isadev = filp->private_data; struct shrm_dev *shrm = isadev->dl_queue.shrm; - u32 m = iminor(inode); + u32 m = iminor(filp->f_path.dentry->d_inode); isadev = (struct isadev_context *)filp->private_data; @@ -734,7 +733,7 @@ const struct file_operations isa_fops = { .owner = THIS_MODULE, .open = isa_open, .release = isa_close, - .ioctl = isa_ioctl, + .unlocked_ioctl = isa_ioctl, .mmap = isa_mmap, .read = isa_read, .write = isa_write, -- cgit v1.2.3 From acf7e62fbf5c87054f9f361a1817849930867f04 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Thu, 28 Apr 2011 14:56:34 +0200 Subject: Fix introduced warnings Signed-off-by: Philippe Langlais --- drivers/net/u8500_shrm.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/net/u8500_shrm.c b/drivers/net/u8500_shrm.c index 55983a59761..aaec346c781 100644 --- a/drivers/net/u8500_shrm.c +++ b/drivers/net/u8500_shrm.c @@ -278,18 +278,12 @@ int shrm_register_netdev(struct shrm_dev *shrm) int shrm_stop_netdev(struct net_device *dev) { - struct shrm_net_iface_priv *net_iface_priv = - (struct shrm_net_iface_priv *)netdev_priv(dev); - netif_stop_queue(dev); return 0; } int shrm_restart_netdev(struct net_device *dev) { - struct shrm_net_iface_priv *net_iface_priv = - (struct shrm_net_iface_priv *)netdev_priv(dev); - if (netif_queue_stopped(dev)) netif_wake_queue(dev); return 0; -- cgit v1.2.3 From a52636a25ce6753030412ee715eab73f3a08cba6 Mon Sep 17 00:00:00 2001 From: Jonas Aaberg Date: Mon, 28 Feb 2011 16:41:33 +0100 Subject: MISC: SHRM: Fix build warning ST-Ericsson Linux next: Not tested, ask SSM for ER ST-Ericsson ID: - ST-Ericsson FOSS-OUT ID: Trivial Change-Id: Ic7f0aecbea1555b78ead3d0dd681eadcca5a2d8e Signed-off-by: Jonas Aaberg Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/17149 --- drivers/misc/shrm/shrm_protocol.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c index dd52f9e20ea..6afe423d2cb 100644 --- a/drivers/misc/shrm/shrm_protocol.c +++ b/drivers/misc/shrm/shrm_protocol.c @@ -465,7 +465,7 @@ void shm_ca_wake_req_work(struct work_struct *work) writel((1<intr_base + GOP_SET_REGISTER_BASE); } - +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET static int shrm_modem_reset_sequence(void) { int err; @@ -539,6 +539,7 @@ static int shrm_modem_reset_sequence(void) return err; } +#endif static void shrm_modem_reset_callback(unsigned long irq) { -- cgit v1.2.3 From 31a888d7f73f5620bc88d90f0824f0b5d74deb04 Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Sat, 26 Mar 2011 13:53:09 +0530 Subject: u8500: shrm: Misc updates and optimisation This patch does following: 1. Protects reset of char queues to prevent a potential kernel crash if MSR is run in rapid succession continuously without allowing the user-space to settle. 2. Removes un-needed memcpy from tx/rx path in shrm net interface. 3. Eliminates use of ph_recv_buf in rx path. 3. Fixes compiler warning in net interface. 4. Updates the protection of writes to shrm fifo. ST-Ericsson ID: ER326117 Change-Id: I6aac23e20a20efc1f9b8a620db455f53e067f9bd Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/19226 Reviewed-by: Hemant-vilas RAMDASI Reviewed-by: Srinidhi KASAGAR --- arch/arm/mach-ux500/include/mach/shrm_net.h | 2 +- drivers/char/shrm_char.c | 3 ++ drivers/misc/shrm/modem_shrm_driver.c | 3 +- drivers/misc/shrm/shrm_fifo.c | 30 +++++++------- drivers/net/u8500_shrm.c | 62 ++++++++++++----------------- 5 files changed, 44 insertions(+), 56 deletions(-) diff --git a/arch/arm/mach-ux500/include/mach/shrm_net.h b/arch/arm/mach-ux500/include/mach/shrm_net.h index 4e675a98f3d..a97b276ee15 100644 --- a/arch/arm/mach-ux500/include/mach/shrm_net.h +++ b/arch/arm/mach-ux500/include/mach/shrm_net.h @@ -33,7 +33,7 @@ struct shrm_net_iface_priv { }; int shrm_register_netdev(struct shrm_dev *shrm_dev_data); -int shrm_net_receive(struct net_device *dev, unsigned char *data); +int shrm_net_receive(struct net_device *dev); int shrm_suspend_netdev(struct net_device *dev); int shrm_resume_netdev(struct net_device *dev); int shrm_stop_netdev(struct net_device *dev); diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c index 2890f152d2d..714d38e42f1 100644 --- a/drivers/char/shrm_char.c +++ b/drivers/char/shrm_char.c @@ -112,6 +112,7 @@ void shrm_char_reset_queues(struct shrm_dev *shrm) isadev = &isa_context->isadev[no_dev]; q = &isadev->dl_queue; + spin_lock_bh(&q->update_lock); /* empty out the msg queue */ list_for_each_safe(cur_msg_ptr, msg_ptr, &q->msg_list) { cur_msg = list_entry(cur_msg_ptr, @@ -129,6 +130,8 @@ void shrm_char_reset_queues(struct shrm_dev *shrm) /* wake up the blocking read/select */ atomic_set(&q->q_rp, 1); wake_up_interruptible(&q->wq_readable); + + spin_unlock_bh(&q->update_lock); } } diff --git a/drivers/misc/shrm/modem_shrm_driver.c b/drivers/misc/shrm/modem_shrm_driver.c index d94c007098b..29368950256 100644 --- a/drivers/misc/shrm/modem_shrm_driver.c +++ b/drivers/misc/shrm/modem_shrm_driver.c @@ -42,7 +42,6 @@ static struct hrtimer timer; #define PHONET_TASKLET #define MAX_RCV_LEN 2048 -static u8 ph_recv_buf[MAX_RCV_LEN]; void do_phonet_rcv_tasklet(unsigned long unused); struct tasklet_struct phonet_rcv_tasklet; @@ -308,7 +307,7 @@ void do_phonet_rcv_tasklet(unsigned long unused) dev_dbg(shrm->dev, "%s IN\n", __func__); for (;;) { - ret = shrm_net_receive(shrm->ndev, ph_recv_buf); + ret = shrm_net_receive(shrm->ndev); if (ret == 0) { dev_dbg(shrm->dev, "len is zero, queue empty\n"); break; diff --git a/drivers/misc/shrm/shrm_fifo.c b/drivers/misc/shrm/shrm_fifo.c index ecf4b7e4466..cbe0949a56d 100644 --- a/drivers/misc/shrm/shrm_fifo.c +++ b/drivers/misc/shrm/shrm_fifo.c @@ -125,6 +125,7 @@ void write_boot_info_resp(struct shrm_dev *shrm, u32 config, u8 msg_length; version = SHRM_VER; + spin_lock_bh(&fifo->fifo_update_lock); /* Read L1 header read content of reader_local_rptr */ msg = (u32 *) (fifo->writer_local_wptr+fifo->fifo_virtual_addr); @@ -144,10 +145,9 @@ void write_boot_info_resp(struct shrm_dev *shrm, u32 config, *msg = ca_csc_inactivity_timer; msg_length = L1_NORMAL_MSG; } - spin_lock(&fifo->fifo_update_lock); fifo->writer_local_wptr += msg_length; fifo->availablesize -= msg_length; - spin_unlock(&fifo->fifo_update_lock); + spin_unlock_bh(&fifo->fifo_update_lock); } /** @@ -240,6 +240,7 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, */ l2_header = ((l2header << L2_HEADER_OFFSET) | ((length) & MASK_0_39_BIT)); + spin_lock_bh(&fifo->fifo_update_lock); /* Check Local Rptr is less than or equal to Local WPtr */ if (fifo->writer_local_rptr <= fifo->writer_local_wptr) { msg = (u32 *) @@ -257,11 +258,9 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, /* copy the l2 message in 1 memcpy */ memcpy((void *)msg, addr, length); /* UpdateWptr */ - spin_lock_bh(&fifo->fifo_update_lock); fifo->writer_local_wptr += requiredsize; fifo->availablesize -= requiredsize; fifo->writer_local_wptr %= fifo->end_addr_fifo; - spin_unlock_bh(&fifo->fifo_update_lock); } else { /* * message is split between and of FIFO and beg of FIFO @@ -273,7 +272,6 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, /* Add L1 header */ *msg = l1_header; msg++; - spin_lock_bh(&fifo->fifo_update_lock); /* UpdateWptr */ fifo->writer_local_wptr = 0; fifo->availablesize -= size; @@ -293,7 +291,6 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, requiredsize-size; fifo->availablesize -= (requiredsize-size); - spin_unlock_bh(&fifo->fifo_update_lock); } else if (size == 2) { /* Add L1 header and L2 header */ *msg = l1_header; @@ -301,7 +298,6 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, *msg = l2_header; msg++; - spin_lock_bh(&fifo->fifo_update_lock); /* UpdateWptr */ fifo->writer_local_wptr = 0; fifo->availablesize -= size; @@ -320,7 +316,6 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, requiredsize-size; fifo->availablesize -= (requiredsize-size); - spin_unlock_bh(&fifo->fifo_update_lock); } else { /* Add L1 header and L2 header */ *msg = l1_header; @@ -331,7 +326,6 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, /* copy the l2 message in 1 memcpy */ memcpy((void *)msg, addr, (size-2)*4); - spin_lock_bh(&fifo->fifo_update_lock); /* UpdateWptr */ fifo->writer_local_wptr = 0; @@ -351,7 +345,6 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, requiredsize-size; fifo->availablesize -= (requiredsize-size); - spin_unlock_bh(&fifo->fifo_update_lock); } } @@ -370,13 +363,12 @@ int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, */ memcpy((void *)msg, addr, length); - spin_lock_bh(&fifo->fifo_update_lock); /* UpdateWptr */ fifo->writer_local_wptr += requiredsize; fifo->availablesize -= requiredsize; - spin_unlock_bh(&fifo->fifo_update_lock); } + spin_unlock_bh(&fifo->fifo_update_lock); return length; } @@ -667,6 +659,7 @@ void update_ac_common_local_rptr(struct shrm_dev *shrm) fifo = &ape_shm_fifo_0; + spin_lock_bh(&fifo->fifo_update_lock); fifo->shared_rptr = (*((u32 *)shrm->ac_common_shared_rptr)); @@ -680,10 +673,9 @@ void update_ac_common_local_rptr(struct shrm_dev *shrm) } /* Chance of race condition of below variables with write_msg */ - spin_lock(&fifo->fifo_update_lock); fifo->availablesize += free_space; fifo->writer_local_rptr = fifo->shared_rptr; - spin_unlock(&fifo->fifo_update_lock); + spin_unlock_bh(&fifo->fifo_update_lock); } void update_ac_audio_local_rptr(struct shrm_dev *shrm) @@ -696,6 +688,7 @@ void update_ac_audio_local_rptr(struct shrm_dev *shrm) u32 free_space = 0; fifo = &ape_shm_fifo_1; + spin_lock_bh(&fifo->fifo_update_lock); fifo->shared_rptr = (*((u32 *)shrm->ac_audio_shared_rptr)); @@ -709,10 +702,9 @@ void update_ac_audio_local_rptr(struct shrm_dev *shrm) } /* Chance of race condition of below variables with write_msg */ - spin_lock(&fifo->fifo_update_lock); fifo->availablesize += free_space; fifo->writer_local_rptr = fifo->shared_rptr; - spin_unlock(&fifo->fifo_update_lock); + spin_unlock_bh(&fifo->fifo_update_lock); } void update_ac_common_shared_wptr(struct shrm_dev *shrm) @@ -724,11 +716,13 @@ void update_ac_common_shared_wptr(struct shrm_dev *shrm) struct fifo_write_params *fifo; fifo = &ape_shm_fifo_0; + spin_lock_bh(&fifo->fifo_update_lock); /* Update shared pointer fifo offset of the IPC zone */ (*((u32 *)shrm->ac_common_shared_wptr)) = fifo->writer_local_wptr; fifo->shared_wptr = fifo->writer_local_wptr; + spin_unlock_bh(&fifo->fifo_update_lock); } void update_ac_audio_shared_wptr(struct shrm_dev *shrm) @@ -740,10 +734,12 @@ void update_ac_audio_shared_wptr(struct shrm_dev *shrm) struct fifo_write_params *fifo; fifo = &ape_shm_fifo_1; + spin_lock_bh(&fifo->fifo_update_lock); /* Update shared pointer fifo offset of the IPC zone */ (*((u32 *)shrm->ac_audio_shared_wptr)) = fifo->writer_local_wptr; fifo->shared_wptr = fifo->writer_local_wptr; + spin_unlock_bh(&fifo->fifo_update_lock); } void update_ca_common_shared_rptr(struct shrm_dev *shrm) @@ -803,9 +799,11 @@ void get_writer_pointers(u8 channel_type, u32 *writer_local_rptr, else /* channel_type = AUDIO_CHANNEL */ fifo = &ape_shm_fifo_1; + spin_lock_bh(&fifo->fifo_update_lock); *writer_local_rptr = fifo->writer_local_rptr; *writer_local_wptr = fifo->writer_local_wptr; *shared_wptr = fifo->shared_wptr; + spin_unlock_bh(&fifo->fifo_update_lock); } void set_ca_msg_0_read_notif_send(u8 val) diff --git a/drivers/net/u8500_shrm.c b/drivers/net/u8500_shrm.c index aaec346c781..488f96f2c04 100644 --- a/drivers/net/u8500_shrm.c +++ b/drivers/net/u8500_shrm.c @@ -22,16 +22,13 @@ #include #include -static u8 wr_isi_msg[10*1024]; - /** * shrm_net_receive() - receive data and copy to user space buffer * @dev: pointer to the network device structure - * @data: pointer to the receive buffer * * Copy data from ISI queue to the user space buffer. */ -int shrm_net_receive(struct net_device *dev, u8 *data) +int shrm_net_receive(struct net_device *dev) { struct sk_buff *skb; struct isadev_context *isadev; @@ -42,9 +39,6 @@ int shrm_net_receive(struct net_device *dev, u8 *data) (struct shrm_net_iface_priv *)netdev_priv(dev); struct shrm_dev *shrm = net_iface_priv->shrm_device; - if (data == NULL) - goto out; - isadev = &shrm->isa_context->isadev[ISI_MESSAGING]; q = &isadev->dl_queue; @@ -60,30 +54,10 @@ int shrm_net_receive(struct net_device *dev, u8 *data) if (msgsize <= 0) return msgsize; - if ((q->readptr+msgsize) >= q->size) { - size = (q->size-q->readptr); - /*Copy First Part of msg*/ - memcpy(data, - (u8 *)(q->fifo_base + q->readptr), size); - /*Copy Second Part of msg at the top of fifo*/ - memcpy(data+size, - (u8 *)(q->fifo_base), (msgsize - size)); - } else { - memcpy(data, - (u8 *)(q->fifo_base+q->readptr), msgsize); - } - - spin_lock_bh(&q->update_lock); - remove_msg_from_queue(q); - spin_unlock_bh(&q->update_lock); - - dev_dbg(shrm->dev, "Data len at shrm_net_receive: %d\n", msgsize); - /* * The packet has been retrieved from the transmission * medium. Build an skb around it, so upper layers can handle it */ - skb = dev_alloc_skb(msgsize); if (!skb) { if (printk_ratelimit()) @@ -92,8 +66,29 @@ int shrm_net_receive(struct net_device *dev, u8 *data) dev->stats.rx_dropped++; goto out; } - skb_copy_to_linear_data(skb, data, msgsize); - skb_put(skb, msgsize); + + if ((q->readptr+msgsize) >= q->size) { + size = (q->size-q->readptr); + /*Copy First Part of msg*/ + skb_copy_to_linear_data(skb, + (u8 *)(q->fifo_base + q->readptr), size); + skb_put(skb, size); + + /*Copy Second Part of msg at the top of fifo*/ + skb_copy_to_linear_data_offset(skb, size, + (u8 *)(q->fifo_base), (msgsize - size)); + skb_put(skb, msgsize-size); + + } else { + skb_copy_to_linear_data(skb, + (u8 *)(q->fifo_base+q->readptr), msgsize); + skb_put(skb, msgsize); + } + + spin_lock_bh(&q->update_lock); + remove_msg_from_queue(q); + spin_unlock_bh(&q->update_lock); + skb_reset_mac_header(skb); __skb_pull(skb, dev->hard_header_len); /*Write metadata, and then pass to the receive level*/ @@ -196,15 +191,8 @@ static netdev_tx_t netdev_isa_write(struct sk_buff *skb, struct net_device *dev) skb->data[SRC_OBJ_INDEX] = skb->data[PIPE_HDL_INDEX]; } - if ((void *)wr_isi_msg != - memcpy((void *)wr_isi_msg, skb->data, skb->len)) { - dev_err(shrm->dev, "memcpy failed\n"); - dev_kfree_skb(skb); - return -EFAULT; - } - spin_lock_bh(&shrm->isa_context->common_tx); - err = shm_write_msg(shrm, ISI_MESSAGING, (void *)wr_isi_msg, + err = shm_write_msg(shrm, ISI_MESSAGING, skb->data, skb->len); if (!err) { dev->stats.tx_packets++; -- cgit v1.2.3 From 2c0cda17d23089167e6a120c24fe0167f2cbd793 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Wed, 12 Oct 2011 10:45:02 +0200 Subject: shrm: sw reset: Save SW Reset Reason before reset Converts the reboot reason string received in SYSCALL_DEFINE4 in sys.c into a 2 bytes reset reason code. This 16 bit value is stored in the TCDM Memory at location: tcdm_base + 0xFF8. The string to code mapping structure has been added in file reboot_reasons.h and reboot_reasons.c. The code for translation has been placed in cpu.c. ST-Ericsson Linux next: Tested and reviewed with 2011-03-28 ST-Ericsson ID: 327863 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I5fe83b824c6dbe3f61a3d77671ce845e6f81d87b Signed-off-by: rickard evertsson Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/19174 Reviewed-by: Mattias WALLIN Conflicts: arch/arm/mach-ux500/Makefile arch/arm/mach-ux500/cpu.c Conflicts: arch/arm/mach-ux500/Makefile arch/arm/mach-ux500/cpu.c arch/arm/mach-ux500/include/mach/prcmu-fw-api.h arch/arm/mach-ux500/include/mach/system.h arch/arm/mach-ux500/prcmu-db8500.c --- drivers/misc/shrm/shrm_protocol.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c index 6afe423d2cb..351f78ecbc2 100644 --- a/drivers/misc/shrm/shrm_protocol.c +++ b/drivers/misc/shrm/shrm_protocol.c @@ -19,6 +19,7 @@ #include #include #include +#include #define L2_HEADER_ISI 0x0 #define L2_HEADER_RPC 0x1 @@ -557,8 +558,9 @@ static void shrm_modem_reset_callback(unsigned long irq) } #else dev_info(shm_dev->dev, "Modem in reset loop, doing System reset\n"); + /* Call the PRCMU reset API */ - prcmu_system_reset(); + prcmu_system_reset(SW_RESET_NO_ARGUMENT); #endif } -- cgit v1.2.3 From 74779bb344ae1f3063a04118569e4ac428f42443 Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Wed, 6 Apr 2011 11:58:13 +0530 Subject: u8500:shrm: Fix null pointer dereference Fixes null pointer dereference in shrm char interface ST-Ericsson Linux next: - ST-Ericsson ID: ER332892 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: Ia60fa08e61e50c2e2645e22c2d7b9c5df01df7ef Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/20103 Reviewed-by: Hemant-vilas RAMDASI Reviewed-by: Arun MURTHY Reviewed-by: Jonas ABERG --- drivers/char/shrm_char.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c index 714d38e42f1..e2aaf60674f 100644 --- a/drivers/char/shrm_char.c +++ b/drivers/char/shrm_char.c @@ -273,6 +273,7 @@ int get_size_of_new_msg(struct message_queue *q) struct queue_element *new_msg = NULL; struct list_head *msg_list; struct shrm_dev *shrm = q->shrm; + int size = 0; dev_dbg(shrm->dev, "%s IN\n", __func__); @@ -284,12 +285,13 @@ int get_size_of_new_msg(struct message_queue *q) dev_err(shrm->dev, "no message found\n"); return -EFAULT; } + size = new_msg->size; break; } spin_unlock_bh(&q->update_lock); dev_dbg(shrm->dev, "%s OUT\n", __func__); - return new_msg->size; + return size; } /** -- cgit v1.2.3 From 99e4bc34b9e5f6bd75fe5f11c1393c197ab7db93 Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Fri, 8 Apr 2011 19:05:15 +0530 Subject: u8500: shrm: Workaround for MSR prcmu driver APIs like prcmu_ac_wake_req/prcmu_ac_sleep_req currently does not support multiple clients. To make the MSR feature working, this patch puts workaround in shrm driver due to the limitations of prcmu driver. ST-Ericsson ID: ER329867 Change-Id: Ic6092f89752e05c53436ec0e07c2f2945dbd56c5 Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/21077 Reviewed-by: QATEST Reviewed-by: Hemant-vilas RAMDASI Reviewed-by: Sebastien RAULT Tested-by: Sebastien RAULT Reviewed-by: Srinidhi KASAGAR --- drivers/misc/shrm/shrm_protocol.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c index 351f78ecbc2..0831bc8803e 100644 --- a/drivers/misc/shrm/shrm_protocol.c +++ b/drivers/misc/shrm/shrm_protocol.c @@ -77,6 +77,21 @@ static void shm_ac_sleep_req_work(struct work_struct *work) mutex_unlock(&ac_state_mutex); } +static void shm_ac_wake_req_work(struct work_struct *work) +{ + mutex_lock(&ac_state_mutex); + /* make sure that we bring down the ac-wake line + * so that prcmu driver will actually write + * to the PRCM_HOSTACCESS_REQ register on the + * next prcmu_ac_wake_req call + */ + prcmu_ac_sleep_req(); + + atomic_inc(&ac_sleep_disable_count); + prcmu_ac_wake_req(); + mutex_unlock(&ac_state_mutex); +} + static u32 get_host_accessport_val(void) { u32 prcm_hostaccess; @@ -369,6 +384,13 @@ void shm_ac_read_notif_0_tasklet(unsigned long tasklet_data) /* multicast that modem is online */ nl_send_multicast_message(SHRM_NL_STATUS_MOD_ONLINE, GFP_ATOMIC); + + /* This decrement corresponds to increment + * done in MSR sequecne + */ + atomic_dec(&ac_sleep_disable_count); + queue_work(shm_dev->shm_ac_sleep_wq, + &shm_dev->shm_ac_sleep_req); } } else if (boot_state == BOOT_DONE) { @@ -504,6 +526,9 @@ static int shrm_modem_reset_sequence(void) /* reset the state for ac-wake LOW logic */ atomic_set(&ac_sleep_disable_count, 0); + queue_work(shm_dev->shm_ac_wake_wq, + &shm_dev->shm_ac_wake_req); + /* stop network queue */ shrm_stop_netdev(shm_dev->ndev); @@ -535,9 +560,6 @@ static int shrm_modem_reset_sequence(void) enable_irq(IRQ_PRCMU_CA_WAKE); enable_irq(IRQ_PRCMU_CA_SLEEP); - /* reset counter for ac-wake/ac-sleep logic */ - atomic_set(&ac_sleep_disable_count, 0); - return err; } #endif @@ -730,6 +752,7 @@ int shrm_protocol_init(struct shrm_dev *shrm, INIT_WORK(&shrm->shm_ca_wake_req, shm_ca_wake_req_work); INIT_WORK(&shrm->shm_ca_sleep_req, shm_ca_sleep_req_work); INIT_WORK(&shrm->shm_ac_sleep_req, shm_ac_sleep_req_work); + INIT_WORK(&shrm->shm_ac_wake_req, shm_ac_wake_req_work); /* set tasklet data */ shm_ca_0_tasklet.data = (unsigned long)shrm; -- cgit v1.2.3 From 4216abad6f3484d451b051bbef2c318a0849199c Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Tue, 19 Apr 2011 21:07:56 +0530 Subject: u8500: shrm: Update AC_Wake logic and one fix for MSR Updates the AC_Wake logic related to MSR. Also, corrects one NULL pointer dereference. ST-Ericsson ID: ER335373 Change-Id: Ie3f46c2a7bcdde9936a0f9eed52f8dcd0ab5a06b Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/21162 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- drivers/char/shrm_char.c | 13 +++++++------ drivers/misc/shrm/shrm_protocol.c | 23 +++++++---------------- 2 files changed, 14 insertions(+), 22 deletions(-) diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c index e2aaf60674f..6a6b3d7245a 100644 --- a/drivers/char/shrm_char.c +++ b/drivers/char/shrm_char.c @@ -236,25 +236,26 @@ int remove_msg_from_queue(struct message_queue *q) { struct queue_element *old_msg = NULL; struct shrm_dev *shrm = q->shrm; - struct list_head *msg; + struct list_head *msg_ptr = NULL; + struct list_head *old_msg_ptr = NULL; dev_dbg(shrm->dev, "%s IN q->readptr %d\n", __func__, q->readptr); - list_for_each(msg, &q->msg_list) { - old_msg = list_entry(msg, struct queue_element, entry); + list_for_each_safe(old_msg_ptr, msg_ptr, &q->msg_list) { + old_msg = list_entry(old_msg_ptr, struct queue_element, entry); if (old_msg == NULL) { dev_err(shrm->dev, "no message found\n"); return -EFAULT; } + list_del(old_msg_ptr); + q->readptr = (q->readptr + old_msg->size)%q->size; + kfree(old_msg); break; } - list_del(msg); - q->readptr = (q->readptr + old_msg->size)%q->size; if (list_empty(&q->msg_list)) { dev_dbg(shrm->dev, "List is empty setting RP= 0\n"); atomic_set(&q->q_rp, 0); } - kfree(old_msg); dev_dbg(shrm->dev, "%s OUT\n", __func__); return 0; diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c index 0831bc8803e..0598c62812f 100644 --- a/drivers/misc/shrm/shrm_protocol.c +++ b/drivers/misc/shrm/shrm_protocol.c @@ -80,14 +80,6 @@ static void shm_ac_sleep_req_work(struct work_struct *work) static void shm_ac_wake_req_work(struct work_struct *work) { mutex_lock(&ac_state_mutex); - /* make sure that we bring down the ac-wake line - * so that prcmu driver will actually write - * to the PRCM_HOSTACCESS_REQ register on the - * next prcmu_ac_wake_req call - */ - prcmu_ac_sleep_req(); - - atomic_inc(&ac_sleep_disable_count); prcmu_ac_wake_req(); mutex_unlock(&ac_state_mutex); } @@ -384,13 +376,6 @@ void shm_ac_read_notif_0_tasklet(unsigned long tasklet_data) /* multicast that modem is online */ nl_send_multicast_message(SHRM_NL_STATUS_MOD_ONLINE, GFP_ATOMIC); - - /* This decrement corresponds to increment - * done in MSR sequecne - */ - atomic_dec(&ac_sleep_disable_count); - queue_work(shm_dev->shm_ac_sleep_wq, - &shm_dev->shm_ac_sleep_req); } } else if (boot_state == BOOT_DONE) { @@ -523,9 +508,13 @@ static int shrm_modem_reset_sequence(void) hrtimer_cancel(&timer); - /* reset the state for ac-wake LOW logic */ + /* + * keep the count to 0 so that we can bring down the line + * for normal ac-wake and ac-sleep logic + */ atomic_set(&ac_sleep_disable_count, 0); + /* workaround for MSR */ queue_work(shm_dev->shm_ac_wake_wq, &shm_dev->shm_ac_wake_req); @@ -598,6 +587,8 @@ static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) #ifdef CONFIG_UX500_SUSPEND suspend_block_sleep(); #endif + if (shrm->msr_flag) + atomic_set(&ac_sleep_disable_count, 0); atomic_inc(&ac_sleep_disable_count); queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_wake_req); break; -- cgit v1.2.3 From 2cec382951d2163fb35e07ba4f5a6ed635935d72 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Thu, 20 Oct 2011 10:13:38 +0200 Subject: U5500 : Mailbox logical driver. The Mailbox is an inter-processor communication device. Message passing is possible between different CPU's. The logical driver allows multiplexing of up to 256 logical channels for each physical mailbox.This driver uses the services of Physical driver in mbox.c Mailboxes are only supported on U5500. ST-Ericsson Linux next: 336280 ST-Ericsson ID: AP 274804 ST-Ericsson FOSS-OUT ID: N/00201-FEA 212 8003 Change-Id: I23bf7e76801b69e13e216f34d88ad5371d787683 Signed-off-by: Bibek Basu Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/20652 Reviewed-by: Srinidhi KASAGAR --- .../mach-ux500/include/mach/mbox_channels-db5500.h | 71 ++ drivers/misc/mbox.c | 565 ++++++++++ drivers/misc/mbox_channels-db5500.c | 1141 ++++++++++++++++++++ 3 files changed, 1777 insertions(+) create mode 100644 arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h create mode 100644 drivers/misc/mbox.c create mode 100644 drivers/misc/mbox_channels-db5500.c diff --git a/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h new file mode 100644 index 00000000000..829b1708bf1 --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * Author: Marcin Mielczarczyk for ST-Ericsson. + * Bibek Basu + * License terms: GNU General Public License (GPL), version 2. + */ + +#ifndef __INC_MBOX_CHANNELS_H +#define __INC_MBOX_CHANNELS_H + +/* Maximum number of datawords which can be send in one PDU */ +#define MAILBOX_NR_OF_DATAWORDS 3 + +/** + * mbox_channel_cb_t - Definition of the mailbox channel callback. + * @data: Pointer to the data. + * @length: Length of the data. + * @priv: The client's private data. + * + * This function will be called upon reception of complete mbox channel PDU + * or after completion of send operation. + */ +typedef void mbox_channel_cb_t (u32 *data, u32 length, void *priv); + +/** + * mbox_channel_msg - Definition of mbox channel message + * @channel: Channel number. + * @data: Pointer to data to be sent. + * @length: Length of data to be sent. + * @cb: Pointer to the callback function to be called when send + * operation will be finished. + * @priv: The client's private data. + * + * This structure describes mailbox channel message. + */ +struct mbox_channel_msg { + u16 channel; + u32 *data; + u8 length; + mbox_channel_cb_t *cb; + void *priv; +}; + +/** mbox_channel_register - Set up a given mailbox channel. + * @channel: Mailbox channel number. + * @cb: Pointer to the callback function to be called when a new message + * is received. + * @priv: Client user data which will be returned in the callback. + * + * Returns 0 on success or a negative error code on error. + */ +int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv); + +/** + * mbox_channel_send - Send data on given mailbox channel. + * @msg: Mailbox channel message to be sent. + * + * Returns 0 on success or a negative error code on error. + */ +int mbox_channel_send(struct mbox_channel_msg *msg); + +/** + * mbox_channel_revoke_messages - Revoke messages on given mailbox channel. + * @channel: Mailbox channel number. + * + * Returns 0 on success or a negative error code on error. + */ +int mbox_channel_revoke_messages(u16 channel); + +#endif /*INC_STE_MBOX_H*/ + diff --git a/drivers/misc/mbox.c b/drivers/misc/mbox.c new file mode 100644 index 00000000000..2b2d51caf9d --- /dev/null +++ b/drivers/misc/mbox.c @@ -0,0 +1,565 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Author: Stefan Nilsson for ST-Ericsson. + * Author: Martin Persson for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2. + */ + +/* + * Mailbox nomenclature: + * + * APE MODEM + * mbox pairX + * .......................... + * . . + * . peer . + * . send ---- . + * . --> | | . + * . | | . + * . ---- . + * . . + * . local . + * . rec ---- . + * . | | <-- . + * . | | . + * . ---- . + * ......................... + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MBOX_NAME "mbox" + +#define MBOX_FIFO_DATA 0x000 +#define MBOX_FIFO_ADD 0x004 +#define MBOX_FIFO_REMOVE 0x008 +#define MBOX_FIFO_THRES_FREE 0x00C +#define MBOX_FIFO_THRES_OCCUP 0x010 +#define MBOX_FIFO_STATUS 0x014 + +#define MBOX_DISABLE_IRQ 0x4 +#define MBOX_ENABLE_IRQ 0x0 +#define MBOX_LATCH 1 + +/* Global list of all mailboxes */ +static struct list_head mboxs = LIST_HEAD_INIT(mboxs); + +static struct mbox *get_mbox_with_id(u8 id) +{ + u8 i; + struct list_head *pos = &mboxs; + for (i = 0; i <= id; i++) + pos = pos->next; + + return (struct mbox *) list_entry(pos, struct mbox, list); +} + +int mbox_send(struct mbox *mbox, u32 mbox_msg, bool block) +{ + int res = 0; + + spin_lock(&mbox->lock); + + dev_dbg(&(mbox->pdev->dev), + "About to buffer 0x%X to mailbox 0x%X." + " ri = %d, wi = %d\n", + mbox_msg, (u32)mbox, mbox->read_index, + mbox->write_index); + + /* Check if write buffer is full */ + while (((mbox->write_index + 1) % MBOX_BUF_SIZE) == mbox->read_index) { + if (!block) { + dev_dbg(&(mbox->pdev->dev), + "Buffer full in non-blocking call! " + "Returning -ENOMEM!\n"); + res = -ENOMEM; + goto exit; + } + spin_unlock(&mbox->lock); + dev_dbg(&(mbox->pdev->dev), + "Buffer full in blocking call! Sleeping...\n"); + mbox->client_blocked = 1; + wait_for_completion(&mbox->buffer_available); + dev_dbg(&(mbox->pdev->dev), + "Blocking send was woken up! Trying again...\n"); + spin_lock(&mbox->lock); + } + + mbox->buffer[mbox->write_index] = mbox_msg; + mbox->write_index = (mbox->write_index + 1) % MBOX_BUF_SIZE; + + /* + * Indicate that we want an IRQ as soon as there is a slot + * in the FIFO + */ + writel(MBOX_ENABLE_IRQ, mbox->virtbase_peer + MBOX_FIFO_THRES_FREE); + +exit: + spin_unlock(&mbox->lock); + return res; +} +EXPORT_SYMBOL(mbox_send); + +#if defined(CONFIG_DEBUG_FS) +/* + * Expected input: + * Example: "echo 0xdeadbeef 4 > mbox-node" sends 0xdeadbeef 4 times + */ +static ssize_t mbox_write_fifo(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + unsigned long mbox_mess; + unsigned long nbr_sends; + unsigned long i; + char int_buf[16]; + char *token; + char *val; + + struct mbox *mbox = (struct mbox *) dev->platform_data; + + strncpy((char *) &int_buf, buf, sizeof(int_buf)); + token = (char *) &int_buf; + + /* Parse message */ + val = strsep(&token, " "); + if ((val == NULL) || (strict_strtoul(val, 16, &mbox_mess) != 0)) + mbox_mess = 0xDEADBEEF; + + val = strsep(&token, " "); + if ((val == NULL) || (strict_strtoul(val, 10, &nbr_sends) != 0)) + nbr_sends = 1; + + dev_dbg(dev, "Will write 0x%lX %ld times using data struct at 0x%X\n", + mbox_mess, nbr_sends, (u32) mbox); + + for (i = 0; i < nbr_sends; i++) + mbox_send(mbox, mbox_mess, true); + + return count; +} + +static ssize_t mbox_read_fifo(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int mbox_value; + struct mbox *mbox = (struct mbox *) dev->platform_data; + + if ((readl(mbox->virtbase_local + MBOX_FIFO_STATUS) & 0x7) <= 0) + return sprintf(buf, "Mailbox is empty\n"); + + mbox_value = readl(mbox->virtbase_local + MBOX_FIFO_DATA); + writel(MBOX_LATCH, (mbox->virtbase_local + MBOX_FIFO_REMOVE)); + + return sprintf(buf, "0x%X\n", mbox_value); +} + +static DEVICE_ATTR(fifo, S_IWUGO | S_IRUGO, mbox_read_fifo, mbox_write_fifo); + +static int mbox_show(struct seq_file *s, void *data) +{ + struct list_head *pos; + u8 mbox_index = 0; + + list_for_each(pos, &mboxs) { + struct mbox *m = + (struct mbox *) list_entry(pos, struct mbox, list); + if (m == NULL) { + seq_printf(s, + "Unable to retrieve mailbox %d\n", + mbox_index); + continue; + } + + spin_lock(&m->lock); + if ((m->virtbase_peer == NULL) || (m->virtbase_local == NULL)) { + seq_printf(s, "MAILBOX %d not setup or corrupt\n", + mbox_index); + spin_unlock(&m->lock); + continue; + } + + seq_printf(s, + "===========================\n" + " MAILBOX %d\n" + " PEER MAILBOX DUMP\n" + "---------------------------\n" + "FIFO: 0x%X (%d)\n" + "Free Threshold: 0x%.2X (%d)\n" + "Occupied Threshold: 0x%.2X (%d)\n" + "Status: 0x%.2X (%d)\n" + " Free spaces (ot): %d (%d)\n" + " Occup spaces (ot): %d (%d)\n" + "===========================\n" + " LOCAL MAILBOX DUMP\n" + "---------------------------\n" + "FIFO: 0x%.X (%d)\n" + "Free Threshold: 0x%.2X (%d)\n" + "Occupied Threshold: 0x%.2X (%d)\n" + "Status: 0x%.2X (%d)\n" + " Free spaces (ot): %d (%d)\n" + " Occup spaces (ot): %d (%d)\n" + "===========================\n" + "write_index: %d\n" + "read_index : %d\n" + "===========================\n" + "\n", + mbox_index, + readl(m->virtbase_peer + MBOX_FIFO_DATA), + readl(m->virtbase_peer + MBOX_FIFO_DATA), + readl(m->virtbase_peer + MBOX_FIFO_THRES_FREE), + readl(m->virtbase_peer + MBOX_FIFO_THRES_FREE), + readl(m->virtbase_peer + MBOX_FIFO_THRES_OCCUP), + readl(m->virtbase_peer + MBOX_FIFO_THRES_OCCUP), + readl(m->virtbase_peer + MBOX_FIFO_STATUS), + readl(m->virtbase_peer + MBOX_FIFO_STATUS), + (readl(m->virtbase_peer + MBOX_FIFO_STATUS) >> 4) & 0x7, + (readl(m->virtbase_peer + MBOX_FIFO_STATUS) >> 7) & 0x1, + (readl(m->virtbase_peer + MBOX_FIFO_STATUS) >> 0) & 0x7, + (readl(m->virtbase_peer + MBOX_FIFO_STATUS) >> 3) & 0x1, + readl(m->virtbase_local + MBOX_FIFO_DATA), + readl(m->virtbase_local + MBOX_FIFO_DATA), + readl(m->virtbase_local + MBOX_FIFO_THRES_FREE), + readl(m->virtbase_local + MBOX_FIFO_THRES_FREE), + readl(m->virtbase_local + MBOX_FIFO_THRES_OCCUP), + readl(m->virtbase_local + MBOX_FIFO_THRES_OCCUP), + readl(m->virtbase_local + MBOX_FIFO_STATUS), + readl(m->virtbase_local + MBOX_FIFO_STATUS), + (readl(m->virtbase_local + MBOX_FIFO_STATUS) >> 4) & 0x7, + (readl(m->virtbase_local + MBOX_FIFO_STATUS) >> 7) & 0x1, + (readl(m->virtbase_local + MBOX_FIFO_STATUS) >> 0) & 0x7, + (readl(m->virtbase_local + MBOX_FIFO_STATUS) >> 3) & 0x1, + m->write_index, m->read_index); + mbox_index++; + spin_unlock(&m->lock); + } + + return 0; +} + +static int mbox_open(struct inode *inode, struct file *file) +{ + return single_open(file, mbox_show, NULL); +} + +static const struct file_operations mbox_operations = { + .owner = THIS_MODULE, + .open = mbox_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif + +static irqreturn_t mbox_irq(int irq, void *arg) +{ + u32 mbox_value; + int nbr_occup; + int nbr_free; + struct mbox *mbox = (struct mbox *) arg; + + spin_lock(&mbox->lock); + + dev_dbg(&(mbox->pdev->dev), + "mbox IRQ [%d] received. ri = %d, wi = %d\n", + irq, mbox->read_index, mbox->write_index); + + /* + * Check if we have any outgoing messages, and if there is space for + * them in the FIFO. + */ + if (mbox->read_index != mbox->write_index) { + /* + * Check by reading FREE for LOCAL since that indicates + * OCCUP for PEER + */ + nbr_free = (readl(mbox->virtbase_local + MBOX_FIFO_STATUS) + >> 4) & 0x7; + dev_dbg(&(mbox->pdev->dev), + "Status indicates %d empty spaces in the FIFO!\n", + nbr_free); + + while ((nbr_free > 0) && + (mbox->read_index != mbox->write_index)) { + /* Write the message and latch it into the FIFO */ + writel(mbox->buffer[mbox->read_index], + (mbox->virtbase_peer + MBOX_FIFO_DATA)); + writel(MBOX_LATCH, + (mbox->virtbase_peer + MBOX_FIFO_ADD)); + dev_dbg(&(mbox->pdev->dev), + "Wrote message 0x%X to addr 0x%X\n", + mbox->buffer[mbox->read_index], + (u32) (mbox->virtbase_peer + MBOX_FIFO_DATA)); + + nbr_free--; + mbox->read_index = + (mbox->read_index + 1) % MBOX_BUF_SIZE; + } + + /* + * Check if we still want IRQ:s when there is free + * space to send + */ + if (mbox->read_index != mbox->write_index) { + dev_dbg(&(mbox->pdev->dev), + "Still have messages to send, but FIFO full. " + "Request IRQ again!\n"); + writel(MBOX_ENABLE_IRQ, + mbox->virtbase_peer + MBOX_FIFO_THRES_FREE); + } else { + dev_dbg(&(mbox->pdev->dev), + "No more messages to send. " + "Do not request IRQ again!\n"); + writel(MBOX_DISABLE_IRQ, + mbox->virtbase_peer + MBOX_FIFO_THRES_FREE); + } + + /* + * Check if we can signal any blocked clients that it is OK to + * start buffering again + */ + if (mbox->client_blocked && + (((mbox->write_index + 1) % MBOX_BUF_SIZE) + != mbox->read_index)) { + dev_dbg(&(mbox->pdev->dev), + "Waking up blocked client\n"); + complete(&mbox->buffer_available); + mbox->client_blocked = 0; + } + } + + /* Check if we have any incoming messages */ + nbr_occup = readl(mbox->virtbase_local + MBOX_FIFO_STATUS) & 0x7; + if (nbr_occup == 0) + goto exit; + + if (mbox->cb == NULL) { + dev_dbg(&(mbox->pdev->dev), "No receive callback registered, " + "leaving %d incoming messages in fifo!\n", nbr_occup); + goto exit; + } + + /* Read and acknowledge the message */ + mbox_value = readl(mbox->virtbase_local + MBOX_FIFO_DATA); + writel(MBOX_LATCH, (mbox->virtbase_local + MBOX_FIFO_REMOVE)); + + /* Notify consumer of new mailbox message */ + dev_dbg(&(mbox->pdev->dev), "Calling callback for message 0x%X!\n", + mbox_value); + mbox->cb(mbox_value, mbox->client_data); + +exit: + dev_dbg(&(mbox->pdev->dev), "Exit mbox IRQ. ri = %d, wi = %d\n", + mbox->read_index, mbox->write_index); + spin_unlock(&mbox->lock); + + return IRQ_HANDLED; +} + +/* Setup is executed once for each mbox pair */ +struct mbox *mbox_setup(u8 mbox_id, mbox_recv_cb_t *mbox_cb, void *priv) +{ + struct resource *resource; + int irq; + int res; + struct mbox *mbox; + + mbox = get_mbox_with_id(mbox_id); + if (mbox == NULL) { + dev_err(&(mbox->pdev->dev), "Incorrect mailbox id: %d!\n", + mbox_id); + goto exit; + } + + /* + * Check if mailbox has been allocated to someone else, + * otherwise allocate it + */ + if (mbox->allocated) { + dev_err(&(mbox->pdev->dev), "Mailbox number %d is busy!\n", + mbox_id); + mbox = NULL; + goto exit; + } + mbox->allocated = true; + + dev_dbg(&(mbox->pdev->dev), "Initiating mailbox number %d: 0x%X...\n", + mbox_id, (u32)mbox); + + mbox->client_data = priv; + mbox->cb = mbox_cb; + + /* Get addr for peer mailbox and ioremap it */ + resource = platform_get_resource_byname(mbox->pdev, + IORESOURCE_MEM, + "mbox_peer"); + if (resource == NULL) { + dev_err(&(mbox->pdev->dev), + "Unable to retrieve mbox peer resource\n"); + mbox = NULL; + goto exit; + } + dev_dbg(&(mbox->pdev->dev), + "Resource name: %s start: 0x%X, end: 0x%X\n", + resource->name, resource->start, resource->end); + mbox->virtbase_peer = ioremap(resource->start, resource_size(resource)); + if (!mbox->virtbase_peer) { + dev_err(&(mbox->pdev->dev), "Unable to ioremap peer mbox\n"); + mbox = NULL; + goto exit; + } + dev_dbg(&(mbox->pdev->dev), + "ioremapped peer physical: (0x%X-0x%X) to virtual: 0x%X\n", + resource->start, resource->end, (u32) mbox->virtbase_peer); + + /* Get addr for local mailbox and ioremap it */ + resource = platform_get_resource_byname(mbox->pdev, + IORESOURCE_MEM, + "mbox_local"); + if (resource == NULL) { + dev_err(&(mbox->pdev->dev), + "Unable to retrieve mbox local resource\n"); + mbox = NULL; + goto exit; + } + dev_dbg(&(mbox->pdev->dev), + "Resource name: %s start: 0x%X, end: 0x%X\n", + resource->name, resource->start, resource->end); + mbox->virtbase_local = ioremap(resource->start, resource_size(resource)); + if (!mbox->virtbase_local) { + dev_err(&(mbox->pdev->dev), "Unable to ioremap local mbox\n"); + mbox = NULL; + goto exit; + } + dev_dbg(&(mbox->pdev->dev), + "ioremapped local physical: (0x%X-0x%X) to virtual: 0x%X\n", + resource->start, resource->end, (u32) mbox->virtbase_peer); + + init_completion(&mbox->buffer_available); + mbox->client_blocked = 0; + + /* Get IRQ for mailbox and allocate it */ + irq = platform_get_irq_byname(mbox->pdev, "mbox_irq"); + if (irq < 0) { + dev_err(&(mbox->pdev->dev), + "Unable to retrieve mbox irq resource\n"); + mbox = NULL; + goto exit; + } + + dev_dbg(&(mbox->pdev->dev), "Allocating irq %d...\n", irq); + res = request_irq(irq, mbox_irq, 0, mbox->name, (void *) mbox); + if (res < 0) { + dev_err(&(mbox->pdev->dev), + "Unable to allocate mbox irq %d\n", irq); + mbox = NULL; + goto exit; + } + + /* Set up mailbox to not launch IRQ on free space in mailbox */ + writel(MBOX_DISABLE_IRQ, mbox->virtbase_peer + MBOX_FIFO_THRES_FREE); + + /* + * Set up mailbox to launch IRQ on new message if we have + * a callback set. If not, do not raise IRQ, but keep message + * in FIFO for manual retrieval + */ + if (mbox_cb != NULL) + writel(MBOX_ENABLE_IRQ, + mbox->virtbase_local + MBOX_FIFO_THRES_OCCUP); + else + writel(MBOX_DISABLE_IRQ, + mbox->virtbase_local + MBOX_FIFO_THRES_OCCUP); + +#if defined(CONFIG_DEBUG_FS) + res = device_create_file(&(mbox->pdev->dev), &dev_attr_fifo); + if (res != 0) + dev_warn(&(mbox->pdev->dev), + "Unable to create mbox sysfs entry"); + + (void) debugfs_create_file("mbox", S_IFREG | S_IRUGO, NULL, + NULL, &mbox_operations); +#endif + + dev_info(&(mbox->pdev->dev), + "Mailbox driver with index %d initiated!\n", mbox_id); + +exit: + return mbox; +} +EXPORT_SYMBOL(mbox_setup); + + +int __init mbox_probe(struct platform_device *pdev) +{ + struct mbox local_mbox; + struct mbox *mbox; + int res = 0; + dev_dbg(&(pdev->dev), "Probing mailbox (pdev = 0x%X)...\n", (u32) pdev); + + memset(&local_mbox, 0x0, sizeof(struct mbox)); + + /* Associate our mbox data with the platform device */ + res = platform_device_add_data(pdev, + (void *) &local_mbox, + sizeof(struct mbox)); + if (res != 0) { + dev_err(&(pdev->dev), + "Unable to allocate driver platform data!\n"); + goto exit; + } + + mbox = (struct mbox *) pdev->dev.platform_data; + mbox->pdev = pdev; + mbox->write_index = 0; + mbox->read_index = 0; + + INIT_LIST_HEAD(&(mbox->list)); + list_add_tail(&(mbox->list), &mboxs); + + sprintf(mbox->name, "%s", MBOX_NAME); + spin_lock_init(&mbox->lock); + + dev_info(&(pdev->dev), "Mailbox driver loaded\n"); + +exit: + return res; +} + +static struct platform_driver mbox_driver = { + .driver = { + .name = MBOX_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init mbox_init(void) +{ + return platform_driver_probe(&mbox_driver, mbox_probe); +} + +module_init(mbox_init); + +void __exit mbox_exit(void) +{ + platform_driver_unregister(&mbox_driver); +} + +module_exit(mbox_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MBOX driver"); diff --git a/drivers/misc/mbox_channels-db5500.c b/drivers/misc/mbox_channels-db5500.c new file mode 100644 index 00000000000..74fdfa7aaae --- /dev/null +++ b/drivers/misc/mbox_channels-db5500.c @@ -0,0 +1,1141 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Mailbox Logical Driver + * + * Author: Marcin Mielczarczyk for ST-Ericsson. + * Bibek Basu ,bibek.basu@stericsson.com> + * License terms: GNU General Public License (GPL), version 2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Defines start sequence number for given mailbox channel */ +#define CHANNEL_START_SEQUENCE_NUMBER 0x80 + +/* Defines number of channels per mailbox unit */ +#define CHANNELS_PER_MBOX_UNIT 256 + +/* + * This macro builds mbox channel PDU header with following format: + * --------------------------------------------------------------------------- + * | | | | | + * | Sequence nmbr | Type | Length | Destination logical channel number | + * | | | | | + * --------------------------------------------------------------------------- + * 31 24 20 16 0 + * + */ +#define BUILD_HEADER(chan, len, type, seq_no) \ + ((chan) | (((len) & 0xf) << 16) | \ + (((type) & 0xf) << 20) | ((seq_no) << 24)) + +/* Returns type from mbox message header */ +#define GET_TYPE(mbox_msg) (((mbox_msg) >> 20) & 0xf) + +/* Returns channel number from mbox message header */ +#define GET_CHANNEL(mbox_msg) ((mbox_msg) & 0xffff) + +/* Returns length of payload from mbox message header */ +#define GET_LENGTH(mbox_msg) (((mbox_msg) >> 16) & 0xf) + +/* Returns sequence number from mbox message header */ +#define GET_SEQ_NUMBER(mbox_msg) (((mbox_msg) >> 24) + +/* Number of buffers */ +#define NUM_DSP_BUFFER 3 + +/* circular buffer indicator */ +static int buffer_index; + +enum mbox_msg{ + MBOX_CLOSE, + MBOX_OPEN, + MBOX_SEND, + MBOX_CAST, + MBOX_ACK, + MBOX_NAK, +}; + +enum mbox_dir { + MBOX_TX, + MBOX_RX, +}; + +struct mbox_channel_mapping { + u16 chan_base; + u8 mbox_id; + enum mbox_dir direction; +}; + +/* This table maps mbox logical channel to mbox id and direction */ +static struct mbox_channel_mapping channel_mappings[] = { + {0x500, 2, MBOX_RX}, /* channel 5 maps to mbox 0.1, dsp->app (unsec) */ + {0x900, 2, MBOX_TX}, /* channel 9 maps to mbox 0.0, app->dsp (unsec) */ +}; + +/* This table specifies mailbox ids which mbox channels module will use */ +static u8 mbox_ids[] = { + 2, /* app <-> dsp (unsec) */ +}; + +/** + * struct mbox_unit_status - current status of mbox unit + * @mbox_id : holds mbox unit identification number + * @mbox : holds mbox pointer after mbox_register() call + * @tx_chans : holds list of open tx mbox channels + * @tx_lock: lock for tx channel + * @rx_chans : holds list of open rx mbox channels + * @rx_lock: lock for rx channel + */ +struct mbox_unit_status { + u8 mbox_id; + struct mbox *mbox; + struct list_head tx_chans; + spinlock_t tx_lock; + struct list_head rx_chans; + spinlock_t rx_lock; +}; + +static struct { + struct platform_device *pdev; + struct mbox_unit_status mbox_unit[ARRAY_SIZE(mbox_ids)]; +} channels; + +/* This structure describes pending element for mbox tx channel */ +struct pending_elem { + struct list_head list; + u32 *data; + u8 length; +}; + +struct rx_pending_elem { + u32 buffer[MAILBOX_NR_OF_DATAWORDS]; + u8 length; + void *priv; +}; + +struct rx_pending_elem rx_pending[NUM_DSP_BUFFER + 1]; + +/* This structure holds list of pending elements for mbox tx channel */ +struct tx_channel { + struct list_head pending; +}; + +/* Specific status for mbox rx channel */ +struct rx_channel { + struct list_head pending; + spinlock_t lock; + u32 buffer[MAILBOX_NR_OF_DATAWORDS]; + u8 index; + u8 length; +}; + +/* This structure holds status of mbox channel - common for tx and rx */ +struct channel_status { + struct list_head list; + u16 channel; + int state; + mbox_channel_cb_t *cb; + void *priv; + u8 seq_number; + bool with_ack; + struct rx_channel rx; + struct tx_channel tx; + struct work_struct receive_msg; + struct work_struct open_msg; + struct work_struct cast_msg; + struct mutex lock; +}; + +/* Checks if provided channel number is valid */ +static bool check_channel(u16 channel, enum mbox_dir direction) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(channel_mappings); i++) { + if ((channel >= channel_mappings[i].chan_base) && + (channel < channel_mappings[i].chan_base + + CHANNELS_PER_MBOX_UNIT)) { + /* Check if direction of given channel is correct*/ + if (channel_mappings[i].direction == direction) + return true; + else + break; + } + } + return false; +} + +/* get the tx channel corresponding to the given rx channel */ +static u16 get_tx_channel(u16 channel) +{ + int i; + int relative_chan = 0; + int mbox_id = 0xFF; + u16 tx_channel = 0xFF; + + for (i = 0; i < ARRAY_SIZE(channel_mappings); i++) { + if ((channel >= channel_mappings[i].chan_base) && + (channel < channel_mappings[i].chan_base + + CHANNELS_PER_MBOX_UNIT)) { + /* Check if direction of given channel is correct*/ + relative_chan = channel - channel_mappings[i].chan_base; + mbox_id = channel_mappings[i].mbox_id; + + } + } + + for (i = 0; i < ARRAY_SIZE(channel_mappings); i++) { + if ((mbox_id == channel_mappings[i].mbox_id) && + (channel_mappings[i].direction == MBOX_TX)) + tx_channel = channel_mappings[i].chan_base + + relative_chan; + } + return tx_channel; +} + +/* Returns mbox unit id for given mbox channel */ +static int get_mbox_id(u16 channel) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(channel_mappings); i++) { + if ((channel >= channel_mappings[i].chan_base) && + (channel < channel_mappings[i].chan_base + + CHANNELS_PER_MBOX_UNIT)) { + return channel_mappings[i].mbox_id; + } + } + /* There is no mbox unit registered for given channel */ + return -EINVAL; +} + +/* Returns mbox structure saved after mbox_register() call */ +static struct mbox *get_mbox(u16 channel) +{ + int i; + int mbox_id = get_mbox_id(channel); + + if (mbox_id < 0) { + dev_err(&channels.pdev->dev, "couldn't get mbox id\n"); + return NULL; + } + + for (i = 0; i < ARRAY_SIZE(channels.mbox_unit); i++) { + if (channels.mbox_unit[i].mbox_id == mbox_id) + return channels.mbox_unit[i].mbox; + } + return NULL; +} + +/* Returns pointer to rx mbox channels list for given mbox unit */ +static struct list_head *get_rx_list(u8 mbox_id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(mbox_ids); i++) { + if (channels.mbox_unit[i].mbox_id == mbox_id) + return &channels.mbox_unit[i].rx_chans; + } + return NULL; +} + +/* Returns pointer to tx mbox channels list for given mbox unit */ +static struct list_head *get_tx_list(u8 mbox_id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(mbox_ids); i++) { + if (channels.mbox_unit[i].mbox_id == mbox_id) + return &channels.mbox_unit[i].tx_chans; + } + return NULL; +} + +static int send_pdu(struct channel_status *chan_status, int command, + u16 channel) +{ + struct mbox *mbox; + u32 header = 0; + int ret = 0; + + /* SEND PDU is not supported */ + if (command == MBOX_SEND) { + dev_err(&channels.pdev->dev, "SEND command not implemented\n"); + ret = -EINVAL; + goto exit; + } + mbox = get_mbox(chan_status->channel); + if (mbox == NULL) { + dev_err(&channels.pdev->dev, "couldn't get mailbox\n"); + ret = -ENOSYS; + goto exit; + } + /* For CAST type send all pending messages */ + if (command == MBOX_CAST) { + struct list_head *pos, *n; + + /* Send all pending messages from TX channel */ + list_for_each_safe(pos, n, &chan_status->tx.pending) { + struct pending_elem *pending = + list_entry(pos, struct pending_elem, list); + int i; + + header = BUILD_HEADER(channel, + pending->length, + command, + chan_status->seq_number); + + ret = mbox_send(mbox, header, true); + if (ret < 0) { + dev_err(&channels.pdev->dev, + "failed to send header, err=%d\n", ret); + goto exit; + } + + for (i = 0; i < pending->length; i++) { + ret = mbox_send(mbox, pending->data[i], true); + if (ret < 0) { + dev_err(&channels.pdev->dev, + "failed to send header, err=%d\n", ret); + goto exit; + } + } + + /* Call client's callback that data is already sent */ + if (chan_status->cb) + chan_status->cb(pending->data, pending->length, + chan_status->priv); + else + dev_err(&channels.pdev->dev, + "%s no callback provided\n", __func__); + + /* Increment sequence number */ + chan_status->seq_number++; + + /* Remove and free element from the list */ + list_del(&pending->list); + kfree(pending); + } + } else { + header = BUILD_HEADER(channel, 0, + command, chan_status->seq_number); + + ret = mbox_send(mbox, header, true); + if (ret < 0) + dev_err(&channels.pdev->dev, "failed to send header\n"); + /* Increment sequence number */ + chan_status->seq_number++; + } + +exit: + return ret; +} + +void mbox_handle_receive_msg(struct work_struct *work) +{ + struct channel_status *rx_chan = container_of(work, + struct channel_status, + receive_msg); + + /* Call client's callback and reset state */ + if (rx_chan->cb) { + static int rx_pending_count; + + if (rx_pending_count == NUM_DSP_BUFFER) + rx_pending_count = 0; + else + rx_pending_count++; + rx_chan->cb(rx_pending[rx_pending_count].buffer, + rx_pending[rx_pending_count].length, + rx_pending[rx_pending_count].priv); + buffer_index--; + } else { + dev_err(&channels.pdev->dev, + "%s no callback provided\n", __func__); + } + +} + +void mbox_handle_open_msg(struct work_struct *work) +{ + struct channel_status *tx_chan = container_of(work, + struct channel_status, + open_msg); + /* Change channel state to OPEN */ + tx_chan->state = MBOX_OPEN; + /* If pending list not empty, start sending data */ + if (!list_empty(&tx_chan->tx.pending)) + send_pdu(tx_chan, MBOX_CAST, tx_chan->channel); +} + +void mbox_handle_cast_msg(struct work_struct *work) +{ + struct channel_status *rx_chan = container_of(work, + struct channel_status, + cast_msg); + /* Check if channel is opened */ + if (rx_chan->state == MBOX_CLOSE) { + /* Peer sent message to closed channel */ + dev_err(&channels.pdev->dev, + "channel in wrong state\n"); + } +} + +static bool handle_receive_msg(u32 mbox_msg, struct list_head *rx_list) +{ + struct list_head *pos; + struct channel_status *tmp; + int i; + static int rx_pending_count; + struct channel_status *rx_chan = NULL; + struct mbox_unit_status *mbox_unit = container_of(rx_list, + struct mbox_unit_status, + rx_chans); + spin_lock(&mbox_unit->rx_lock); + list_for_each(pos, rx_list) { + tmp = list_entry(pos, struct channel_status, list); + if (tmp->state == MBOX_SEND || + tmp->state == MBOX_CAST) + /* Received message is payload */ + rx_chan = tmp; + } + /* Received message is header */ + spin_unlock(&mbox_unit->rx_lock); + if (rx_chan) { + /* Store received data in RX channel buffer */ + rx_chan->rx.buffer[rx_chan->rx.index++] = mbox_msg; + /* Check if it's last data of PDU */ + if (rx_chan->rx.index == rx_chan->rx.length) { + if (rx_pending_count == NUM_DSP_BUFFER) + rx_pending_count = 0; + else + rx_pending_count++; + for (i = 0; i < MAILBOX_NR_OF_DATAWORDS; i++) { + rx_pending[rx_pending_count].buffer[i] = + rx_chan->rx.buffer[i]; + } + rx_pending[rx_pending_count].length = + rx_chan->rx.length; + rx_pending[rx_pending_count].priv = rx_chan->priv; + rx_chan->rx.index = 0; + rx_chan->rx.length = 0; + rx_chan->state = MBOX_OPEN; + rx_chan->seq_number++; + buffer_index++; + if (buffer_index >= NUM_DSP_BUFFER) + dev_err(&channels.pdev->dev, + "rxbuf overflow%d\n", buffer_index); + schedule_work(&rx_chan->receive_msg); + } + dev_dbg(&channels.pdev->dev, "%s OK\n", __func__); + return true; + } + return false; +} + +static void handle_open_msg(u16 channel, u8 mbox_id) +{ + struct list_head *tx_list, *pos; + struct channel_status *tmp; + struct channel_status *tx_chan = NULL; + struct mbox_unit_status *mbox_unit; + channel = get_tx_channel(channel); + dev_dbg(&channels.pdev->dev, "%s mbox_id %d\tchannel %x\n", + __func__, mbox_id, channel); + /* Get TX channesenx for given mbox unit */ + tx_list = get_tx_list(mbox_id); + if (tx_list == NULL) { + dev_err(&channels.pdev->dev, "given mbox id is not valid %d\n", + mbox_id); + return; + } + mbox_unit = container_of(tx_list, struct mbox_unit_status, tx_chans); + /* Search for channel in tx list */ + spin_lock(&mbox_unit->tx_lock); + list_for_each(pos, tx_list) { + tmp = list_entry(pos, struct channel_status, list); + dev_dbg(&channels.pdev->dev, "tmp->channel=%d\n", + tmp->channel); + if (tmp->channel == channel) + tx_chan = tmp; + } + spin_unlock(&mbox_unit->tx_lock); + if (tx_chan) { + schedule_work(&tx_chan->open_msg); + } else { + /* No tx channel found on the list, allocate new element */ + tx_chan = kzalloc(sizeof(*tx_chan), GFP_KERNEL); + if (tx_chan == NULL) { + dev_err(&channels.pdev->dev, + "failed to allocate memory\n"); + return; + } + + /* Fill initial data and add this element to tx list */ + tx_chan->channel = get_tx_channel(channel); + tx_chan->state = MBOX_OPEN; + tx_chan->seq_number = CHANNEL_START_SEQUENCE_NUMBER; + INIT_LIST_HEAD(&tx_chan->tx.pending); + INIT_WORK(&tx_chan->open_msg, mbox_handle_open_msg); + INIT_WORK(&tx_chan->cast_msg, mbox_handle_cast_msg); + INIT_WORK(&tx_chan->receive_msg, mbox_handle_receive_msg); + mutex_init(&tx_chan->lock); + spin_lock(&mbox_unit->tx_lock); + list_add_tail(&tx_chan->list, tx_list); + spin_unlock(&mbox_unit->tx_lock); + } +} + +static void handle_cast_msg(u16 channel, struct list_head *rx_list, + u32 mbox_msg, bool send) +{ + struct list_head *pos; + struct channel_status *tmp; + struct channel_status *rx_chan = NULL; + struct mbox_unit_status *mbox_unit = container_of(rx_list, + struct mbox_unit_status, + rx_chans); + dev_dbg(&channels.pdev->dev, " %s\n", __func__); + /* Search for channel in rx list */ + spin_lock(&mbox_unit->rx_lock); + list_for_each(pos, rx_list) { + tmp = list_entry(pos, struct channel_status, list); + if (tmp->channel == channel) + rx_chan = tmp; + } + spin_unlock(&mbox_unit->rx_lock); + + if (rx_chan) { + rx_chan->rx.buffer[0] = mbox_msg; + rx_chan->with_ack = send; + rx_chan->rx.length = GET_LENGTH(rx_chan->rx.buffer[0]); + if (rx_chan->rx.length <= MAILBOX_NR_OF_DATAWORDS && + rx_chan->rx.length > 0) { + rx_chan->rx.index = 0; + rx_chan->state = MBOX_CAST; + } + schedule_work(&rx_chan->cast_msg); + } else { + /* Channel not found, peer sent wrong message */ + dev_err(&channels.pdev->dev, "channel %d doesn't exist\n", + channel); + } +} + +/* + * This callback is called whenever mbox unit receives data. + * priv parameter holds mbox unit id. + */ +static void mbox_cb(u32 mbox_msg, void *priv) +{ + u8 mbox_id = *(u8 *)priv; + struct list_head *rx_list; + u8 type = GET_TYPE(mbox_msg); + u16 channel = GET_CHANNEL(mbox_msg); + + dev_dbg(&channels.pdev->dev, "%s type %d\t, mbox_msg %x\n", + __func__, type, mbox_msg); + /* Get RX channels list for given mbox unit */ + rx_list = get_rx_list(mbox_id); + if (rx_list == NULL) { + dev_err(&channels.pdev->dev, "given mbox id is not valid %d\n", + mbox_id); + return; + } + + /* If received message is payload this function will take care of it */ + if (handle_receive_msg(mbox_msg, rx_list)) + return; + + /* Received message is header as no RX channel is in SEND/CAST state */ + switch (type) { + case MBOX_CLOSE: + /* Not implemented */ + break; + case MBOX_OPEN: + handle_open_msg(channel, mbox_id); + break; + case MBOX_SEND: + handle_cast_msg(channel, rx_list, mbox_msg, true); + break; + case MBOX_CAST: + handle_cast_msg(channel, rx_list, mbox_msg, false); + break; + case MBOX_ACK: + case MBOX_NAK: + /* Not implemented */ + break; + } +} + +int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) +{ + struct channel_status *rx_chan; + struct list_head *pos, *rx_list; + int res = 0; + struct mbox_unit_status *mbox_unit; + + dev_dbg(&channels.pdev->dev, " %s channel = %d\n", __func__, channel); + /* Closing of channels is not implemented */ + if (cb == NULL) { + dev_err(&channels.pdev->dev, + "channel close is not implemented\n"); + res = -EINVAL; + goto exit; + } + + /* Check if provided channel number is valid */ + if (!check_channel(channel, MBOX_RX)) { + dev_err(&channels.pdev->dev, "wrong mbox channel number %d\n", + channel); + res = -EINVAL; + goto exit; + } + + rx_list = get_rx_list(get_mbox_id(channel)); + if (rx_list == NULL) { + dev_err(&channels.pdev->dev, "given mbox id is not valid\n"); + res = -EINVAL; + goto exit; + } + + mbox_unit = container_of(rx_list, struct mbox_unit_status, rx_chans); + + /* Check if channel is already registered */ + spin_lock(&mbox_unit->rx_lock); + list_for_each(pos, rx_list) { + rx_chan = list_entry(pos, struct channel_status, list); + + if (rx_chan->channel == channel) { + dev_dbg(&channels.pdev->dev, + "channel already registered\n"); + rx_chan->cb = cb; + rx_chan->priv = priv; + spin_unlock(&mbox_unit->rx_lock); + goto exit; + } + } + spin_unlock(&mbox_unit->rx_lock); + + rx_chan = kzalloc(sizeof(*rx_chan), GFP_KERNEL); + if (rx_chan == NULL) { + dev_err(&channels.pdev->dev, + "couldn't allocate channel status\n"); + res = -ENOMEM; + goto exit; + } + + /* Fill out newly allocated element and add it to rx list */ + rx_chan->channel = channel; + rx_chan->cb = cb; + rx_chan->priv = priv; + rx_chan->seq_number = CHANNEL_START_SEQUENCE_NUMBER; + mutex_init(&rx_chan->lock); + INIT_LIST_HEAD(&rx_chan->rx.pending); + INIT_WORK(&rx_chan->open_msg, mbox_handle_open_msg); + INIT_WORK(&rx_chan->cast_msg, mbox_handle_cast_msg); + INIT_WORK(&rx_chan->receive_msg, mbox_handle_receive_msg); + spin_lock(&mbox_unit->rx_lock); + list_add_tail(&rx_chan->list, rx_list); + spin_unlock(&mbox_unit->rx_lock); + + mutex_lock(&rx_chan->lock); + res = send_pdu(rx_chan, MBOX_OPEN, get_tx_channel(rx_chan->channel)); + if (res) { + dev_err(&channels.pdev->dev, "failed to send OPEN command\n"); + spin_lock(&mbox_unit->rx_lock); + list_del(&rx_chan->list); + spin_unlock(&mbox_unit->rx_lock); + kfree(rx_chan); + } else { + rx_chan->seq_number++; + rx_chan->state = MBOX_OPEN; + } + mutex_unlock(&rx_chan->lock); +exit: + return res; +} +EXPORT_SYMBOL(mbox_channel_register); + +int mbox_channel_send(struct mbox_channel_msg *msg) +{ + struct list_head *pos, *tx_list; + struct channel_status *tmp = NULL; + struct channel_status *tx_chan = NULL; + struct pending_elem *pending; + struct mbox_unit_status *mbox_unit; + + if (msg->length > MAILBOX_NR_OF_DATAWORDS || msg->length == 0) { + dev_err(&channels.pdev->dev, "data length incorrect\n"); + return -EINVAL; + } + + if (!check_channel(msg->channel, MBOX_TX)) { + dev_err(&channels.pdev->dev, "wrong channel number %d\n", + msg->channel); + return -EINVAL; + } + + tx_list = get_tx_list(get_mbox_id(msg->channel)); + if (tx_list == NULL) { + dev_err(&channels.pdev->dev, "given mbox id is not valid\n"); + return -EINVAL; + } + + mbox_unit = container_of(tx_list, struct mbox_unit_status, tx_chans); + + spin_lock(&mbox_unit->tx_lock); + dev_dbg(&channels.pdev->dev, "send:tx_list=%x\tmbox_unit=%x\n", + (u32)tx_list, (u32)mbox_unit); + list_for_each(pos, tx_list) { + tmp = list_entry(pos, struct channel_status, list); + if (tmp->channel == msg->channel) + tx_chan = tmp; + } + spin_unlock(&mbox_unit->tx_lock); + /* Allocate pending element and add it to the list */ + pending = kzalloc(sizeof(*pending), GFP_KERNEL); + if (pending == NULL) { + dev_err(&channels.pdev->dev, + "couldn't allocate memory for pending\n"); + return -ENOMEM; + } + pending->data = msg->data; + pending->length = msg->length; + + if (tx_chan) { + mutex_lock(&tx_chan->lock); + list_add_tail(&pending->list, &tx_chan->tx.pending); + tx_chan->cb = msg->cb; + tx_chan->priv = msg->priv; + /* If channel is already opened start sending data */ + if (tx_chan->state == MBOX_OPEN) + send_pdu(tx_chan, MBOX_CAST, tx_chan->channel); + /* Stop processing here */ + mutex_unlock(&tx_chan->lock); + } else { + /* No channel found on the list, allocate new element */ + tx_chan = kzalloc(sizeof(*tx_chan), GFP_KERNEL); + if (tx_chan == NULL) { + dev_err(&channels.pdev->dev, + "couldn't allocate memory for \ + tx_chan\n"); + return -ENOMEM; + } + tx_chan->channel = msg->channel; + tx_chan->cb = msg->cb; + tx_chan->priv = msg->priv; + tx_chan->state = MBOX_CLOSE; + tx_chan->seq_number = CHANNEL_START_SEQUENCE_NUMBER; + INIT_LIST_HEAD(&tx_chan->tx.pending); + INIT_WORK(&tx_chan->open_msg, mbox_handle_open_msg); + INIT_WORK(&tx_chan->cast_msg, mbox_handle_cast_msg); + INIT_WORK(&tx_chan->receive_msg, mbox_handle_receive_msg); + mutex_init(&tx_chan->lock); + spin_lock(&mbox_unit->tx_lock); + list_add_tail(&tx_chan->list, tx_list); + spin_unlock(&mbox_unit->tx_lock); + mutex_lock(&tx_chan->lock); + list_add_tail(&pending->list, &tx_chan->tx.pending); + mutex_unlock(&tx_chan->lock); + } + return 0; +} +EXPORT_SYMBOL(mbox_channel_send); + +static void revoke_pending_msgs(struct channel_status *tx_chan) +{ + struct list_head *pos, *n; + struct pending_elem *pending; + + list_for_each_safe(pos, n, &tx_chan->tx.pending) { + pending = list_entry(pos, struct pending_elem, list); + + if (tx_chan->cb) + tx_chan->cb(pending->data, pending->length, + tx_chan->priv); + else + dev_err(&channels.pdev->dev, + "%s no callback provided\n", __func__); + list_del(&pending->list); + kfree(pending); + } +} + +/* Clear all pending messages from TX channel */ +int mbox_channel_revoke_messages(u16 channel) +{ + struct list_head *pos, *tx_list; + struct channel_status *tmp; + struct channel_status *tx_chan = NULL; + struct mbox_unit_status *mbox_unit; + int res = 0; + + if (!check_channel(channel, MBOX_TX)) { + dev_err(&channels.pdev->dev, + "wrong channel number %d\n", channel); + return -EINVAL; + } + + tx_list = get_tx_list(get_mbox_id(channel)); + if (tx_list == NULL) { + dev_err(&channels.pdev->dev, "given mbox id is not valid\n"); + return -EINVAL; + } + + mbox_unit = container_of(tx_list, struct mbox_unit_status, tx_chans); + + spin_lock(&mbox_unit->tx_lock); + list_for_each(pos, tx_list) { + tmp = list_entry(pos, struct channel_status, list); + if (tmp->channel == channel) + tx_chan = tmp; + } + spin_unlock(&mbox_unit->tx_lock); + + if (tx_chan) { + mutex_lock(&tx_chan->lock); + revoke_pending_msgs(tx_chan); + mutex_unlock(&tx_chan->lock); + dev_dbg(&channels.pdev->dev, "channel %d cleared\n", + channel); + } else { + dev_err(&channels.pdev->dev, "no channel found\n"); + res = -EINVAL; + } + + dev_dbg(&channels.pdev->dev, "%s exiting %d\n", __func__, res); + return res; +} +EXPORT_SYMBOL(mbox_channel_revoke_messages); + +#if defined(CONFIG_DEBUG_FS) +#define MBOXTEST_DEBUG 1 +#ifdef MBOXTEST_DEBUG +#define DBG_TEST(x) x +#else +#define DBG_TEST(x) +#endif + +#define MBOX_TEST_MAX_WORDS 3 +#define MBOX_RX_CHAN 0x500 +#define MBOX_TX_RX_CHANNEL_DIFF 0x400 +#define MBOX_MAX_NUM_TRANSFER 30000 +static int registration_done; +/** + * struct mboxtest_data - mbox test via debugfs information + * @rx_buff: Buffer for incomming data + * @rx_pointer: Ptr to actual RX data buff + * @tx_buff Buffer for outgoing data + * @tx_pointer: Ptr to actual TX data buff + * @tx_done: TX Transfer done indicator + * @rx_done: RX Transfer done indicator + * @received Received words + * @xfer_words: Num of bytes in actual trf + * @xfers: Number of transfers + * @words Number of total words + * @channel: Channel test number + */ +struct mboxtest_data { + unsigned int *rx_buff; + unsigned int *rx_pointer; + unsigned int *tx_buff; + unsigned int *tx_pointer; + struct completion tx_done; + struct completion rx_done; + int received; + int xfer_words; + int xfers; + int words; + int channel; +}; + +static void mboxtest_receive_cb(u32 *data, u32 len, void *arg) +{ + struct mboxtest_data *mboxtest = (struct mboxtest_data *) arg; + int i; + + printk(KERN_INFO "receive_cb.. data.= 0x%X, len = %d\n", + *data, len); + + for (i = 0; i < len; i++) + *(mboxtest->rx_pointer++) = *(data++); + + mboxtest->received += len; + + printk(KERN_INFO "received = %d, words = %d\n", + mboxtest->received, mboxtest->words); + if (mboxtest->received >= mboxtest->words) + complete(&mboxtest->rx_done); + dev_dbg(&channels.pdev->dev, "%s exiting\n", __func__); +} + +static void mboxtest_send_cb(u32 *data, u32 len, void *arg) +{ + struct mboxtest_data *mboxtest = (struct mboxtest_data *) arg; + + printk(KERN_INFO "send_cb.. data.= 0x%X, len = %d\n", + *data, len); + + complete(&mboxtest->tx_done); + dev_dbg(&channels.pdev->dev, "kernel:mboxtest_send_cb exiting\n"); +} + +static int mboxtest_transmit(struct mboxtest_data *mboxtest) +{ + int status = 0; + struct mbox_channel_msg msg; + + dev_dbg(&channels.pdev->dev, "%s entering\n", __func__); + init_completion(&mboxtest->tx_done); + + msg.channel = mboxtest->channel; + msg.data = mboxtest->tx_pointer; + msg.length = mboxtest->words; + msg.cb = mboxtest_send_cb; + msg.priv = mboxtest; + + status = mbox_channel_send(&msg); + if (!status) { + mboxtest->tx_pointer += mboxtest->xfer_words; + wait_for_completion(&mboxtest->tx_done); + } + + dev_dbg(&channels.pdev->dev, "%s exiting %d\n", + __func__, status); + return status; +} + +static int transfer_test(struct mboxtest_data *mboxtest) +{ + int status = 0; + int len = 0; + int i; + + len = mboxtest->words; + + dev_dbg(&channels.pdev->dev, "%s enterring\n", __func__); + /* Allocate buffers */ + mboxtest->rx_buff = kzalloc(sizeof(unsigned int) * len, GFP_KERNEL); + if (!mboxtest->rx_buff) { + DBG_TEST(printk(KERN_INFO + "Cannot allocate mbox rx memory\n")); + status = -ENOMEM; + goto err1; + } + memset(mboxtest->rx_buff, '\0', sizeof(unsigned int) * len); + + mboxtest->tx_buff = kzalloc(sizeof(unsigned int) * len, GFP_KERNEL); + if (!mboxtest->tx_buff) { + DBG_TEST(printk(KERN_INFO + "Cannot allocate mbox tx memory\n")); + status = -ENOMEM; + goto err2; + } + memset(mboxtest->tx_buff, '\0', sizeof(unsigned int) * len); + + /* Generate data */ + get_random_bytes((unsigned char *)mboxtest->tx_buff, + sizeof(unsigned int) * len); + /* Set pointers */ + mboxtest->tx_pointer = mboxtest->tx_buff; + mboxtest->rx_pointer = mboxtest->rx_buff; + mboxtest->received = 0; + init_completion(&mboxtest->rx_done); + + /* Start tx transfer test transfer */ + status = mboxtest_transmit(mboxtest); + DBG_TEST(printk(KERN_INFO "xfer_words=%d\n", + mboxtest->xfer_words)); + if (!status) + wait_for_completion(&mboxtest->rx_done); + for (i = 0; i < len; i++) + DBG_TEST(printk(KERN_INFO "%d -> TX:0x%X, RX:0x%X\n", i, + mboxtest->tx_buff[i], mboxtest->rx_buff[i])); + + dev_dbg(&channels.pdev->dev, "%s exiting %d\n", __func__, status); + return status; +err2: + kfree(mboxtest->rx_buff); +err1: + return status; +} + +static int mboxtest_prepare(struct mboxtest_data *mboxtest) +{ + int err = 0; + + mboxtest->xfers = MBOX_MAX_NUM_TRANSFER; + /* Calculate number of bytes in each transfer */ + mboxtest->xfer_words = mboxtest->words / mboxtest->xfers; + + /* Trim to maxiumum data words per transfer */ + if (mboxtest->xfer_words > MBOX_TEST_MAX_WORDS) { + DBG_TEST(printk(KERN_INFO "Recalculating xfers ...\n")); + mboxtest->xfer_words = MBOX_TEST_MAX_WORDS; + if (mboxtest->words % mboxtest->xfer_words) + mboxtest->xfers = (mboxtest->words / + mboxtest->xfer_words) + 1; + else + mboxtest->xfers = (mboxtest->words / + mboxtest->xfer_words); + } + + DBG_TEST(printk(KERN_INFO "Params: chan=0x%X words=%d, xfers=%d\n", + mboxtest->channel, mboxtest->words, + mboxtest->xfers)); + + if (mbox_channel_register(mboxtest->channel, + mboxtest_receive_cb, mboxtest)) { + DBG_TEST(printk(KERN_INFO "Cannot register mbox channel\n")); + err = -ENOMEM; + goto err; + } + + registration_done = true; + return 0; +err: + kfree(mboxtest); + return err; +} + +struct mboxtest_data mboxtest; +/* + * Expected input: + * Example: "echo 500 2" + */ +static ssize_t mbox_write_channel(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + unsigned long nbr_channel; + unsigned long nbr_word; + char int_buf[16]; + char *token; + char *val; + + strncpy((char *) &int_buf, buf, sizeof(int_buf)); + token = (char *) &int_buf; + + /* Parse message */ + val = strsep(&token, " "); + if ((val == NULL) || (strict_strtoul(val, 16, &nbr_channel) != 0)) + nbr_channel = MBOX_RX_CHAN; + + val = strsep(&token, " "); + if ((val == NULL) || (strict_strtoul(val, 16, &nbr_word) != 0)) + nbr_word = 2; + + dev_dbg(dev, "Will setup logical channel %ld\n", nbr_channel); + mboxtest.channel = nbr_channel; + mboxtest.words = nbr_word; + + if (!registration_done) + mboxtest_prepare(&mboxtest); + else + dev_dbg(&channels.pdev->dev, "already registration done\n"); + + return count; +} + +static ssize_t mbox_read_channel(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + + unsigned long i; + static bool config_done; + + if (!config_done) { + config_done = true; + mboxtest.channel += MBOX_TX_RX_CHANNEL_DIFF; + } + dev_dbg(dev, "Will transfer %d words %d times at channel 0x%x\n", + mboxtest.words, mboxtest.xfers, mboxtest.channel); + for (i = 0; i < mboxtest.xfers; i++) + transfer_test(&mboxtest); + + return 1; +} +static DEVICE_ATTR(channel, S_IWUGO | S_IRUGO, mbox_read_channel, + mbox_write_channel); + +#endif + +static int __init mbox_channel_probe(struct platform_device *pdev) +{ + int i, ret = 0; + struct mbox *mbox; + + dev_dbg(&(pdev->dev), "Probing mailbox (pdev = 0x%X)...\n", (u32)pdev); + + /* Register to given mailbox units (ids) */ + for (i = 0; i < ARRAY_SIZE(mbox_ids); i++) { + mbox = mbox_setup(mbox_ids[i], mbox_cb, &mbox_ids[i]); + if (mbox == NULL) { + dev_err(&(pdev->dev), "Unable to setup mailbox %d\n", + mbox_ids[i]); + ret = -EBUSY; + goto exit; + } + channels.mbox_unit[i].mbox_id = mbox_ids[i]; + channels.mbox_unit[i].mbox = mbox; + INIT_LIST_HEAD(&channels.mbox_unit[i].rx_chans); + INIT_LIST_HEAD(&channels.mbox_unit[i].tx_chans); + spin_lock_init(&channels.mbox_unit[i].rx_lock); + spin_lock_init(&channels.mbox_unit[i].tx_lock); + } + + channels.pdev = pdev; + + dev_dbg(&(pdev->dev), "Mailbox channel driver loaded\n"); +#if defined(CONFIG_DEBUG_FS) + ret = device_create_file(&(pdev->dev), &dev_attr_channel); + if (ret != 0) + dev_warn(&(pdev->dev), + "Unable to create mbox_channel sysfs entry"); + + +#endif +exit: + return ret; +} + +static struct platform_driver mbox_channel_driver = { + .driver = { + .name = "mbox_channel", + .owner = THIS_MODULE, + }, +}; + +static int __init mbox_channel_init(void) +{ + if (!machine_is_u5500()) + return 0; + + platform_device_register_simple("mbox_channel", 0, NULL, 0); + + return platform_driver_probe(&mbox_channel_driver, mbox_channel_probe); +} +module_init(mbox_channel_init); + +static void __exit mbox_channel_exit(void) +{ + platform_driver_unregister(&mbox_channel_driver); +} +module_exit(mbox_channel_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MBOX channels driver"); -- cgit v1.2.3 From 8289d0b9bb1cf037985ef571e436537c542d3759 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Fri, 14 Oct 2011 09:42:59 +0200 Subject: kernel-doc: shrm: fix kernel-doc warnings fix the potential kernel-doc warnings ST-Ericsson Linux next: - ST-Ericsson ID: 327425 ST-Ericsson FOSS-OUT ID: Trivial Signed-off-by: om prakash Change-Id: Ibaa302ddbaa8e223b81bd047fceaf7c3b97af491 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23345 Reviewed-by: Rabin VINCENT Reviewed-by: Jonas ABERG Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- Documentation/DocBook/shrm.tmpl | 2 +- arch/arm/mach-ux500/include/mach/shrm_driver.h | 1 + arch/arm/mach-ux500/include/mach/shrm_private.h | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/DocBook/shrm.tmpl b/Documentation/DocBook/shrm.tmpl index b35e1bc4e0b..7f21cd3f7dd 100644 --- a/Documentation/DocBook/shrm.tmpl +++ b/Documentation/DocBook/shrm.tmpl @@ -109,6 +109,7 @@ This Section lists the API's provided by the SHRM driver used in transmission of RPC, AUDIO and SECURITY messages. !Edrivers/char/shrm_char.c + @@ -132,7 +133,6 @@ This Section lists some of the Data structure used by the SHRM driver. -!Iarch/arm/mach-ux500/include/mach/shrm.h !Iarch/arm/mach-ux500/include/mach/shrm_driver.h !Iarch/arm/mach-ux500/include/mach/shrm_private.h diff --git a/arch/arm/mach-ux500/include/mach/shrm_driver.h b/arch/arm/mach-ux500/include/mach/shrm_driver.h index 41f518238b3..36bb8413ad9 100644 --- a/arch/arm/mach-ux500/include/mach/shrm_driver.h +++ b/arch/arm/mach-ux500/include/mach/shrm_driver.h @@ -173,6 +173,7 @@ struct message_queue { * struct isadev_context - shrm char interface context * @dl_queue: structre to store the queue related info * @device_id: message id(ISI, RPC, AUDIO, SECURITY) + * @addr: device addresses. */ struct isadev_context { struct message_queue dl_queue; diff --git a/arch/arm/mach-ux500/include/mach/shrm_private.h b/arch/arm/mach-ux500/include/mach/shrm_private.h index 33a0e18234b..1f09e7bef94 100644 --- a/arch/arm/mach-ux500/include/mach/shrm_private.h +++ b/arch/arm/mach-ux500/include/mach/shrm_private.h @@ -61,6 +61,7 @@ typedef void (*MSG_PENDING_NOTIF)(const u32 Wptr); * @availablesize: available memory in fifo * @end_addr_fifo: fifo end addr * @fifo_virtual_addr: fifo virtual addr + * @fifo_update_lock: spin lock to update fifo. * * On writting a message to FIFO the same has to be read by the modem before * writing the next message to the FIFO. In oder to over come this a local -- cgit v1.2.3 From 7770e4b36526f673ec1f6fc79f3a5fd921573c1e Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Fri, 14 Oct 2011 09:47:42 +0200 Subject: mach_ux500: Add support for mloader. Add support for mloader platform driver for u4500. ST-Ericsson ID: AP 335929 ST-Ericsson FOSS-OUT ID: NA Change-Id: I0df37c29121097e078277b8989d33dfc9963a1f4 Signed-off-by: Sesahgiri.Holi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/21012 Reviewed-by: Martin PERSSON Reviewed-by: Preetham-rao K Tested-by: Preetham-rao K Reviewed-by: Srinidhi KASAGAR Conflicts: arch/arm/mach-ux500/Kconfig arch/arm/mach-ux500/Makefile arch/arm/mach-ux500/board-u5500.c --- arch/arm/mach-ux500/mloader-db5500.c | 186 +++++++++++++++++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100644 arch/arm/mach-ux500/mloader-db5500.c diff --git a/arch/arm/mach-ux500/mloader-db5500.c b/arch/arm/mach-ux500/mloader-db5500.c new file mode 100644 index 00000000000..946a0ff490d --- /dev/null +++ b/arch/arm/mach-ux500/mloader-db5500.c @@ -0,0 +1,186 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Authors: Jonas Aaberg + * Paer-Olof Haakansson + * for ST-Ericsson. + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include + +static ssize_t db5500_mloader_sysfs_addr(struct device *dev, + struct device_attribute *attr, + char *buf); + +static ssize_t db5500_mloader_sysfs_finalize(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); + + +static DEVICE_ATTR(addr, S_IRUSR|S_IRGRP, db5500_mloader_sysfs_addr, NULL); +static DEVICE_ATTR(finalize, S_IWUSR, NULL, db5500_mloader_sysfs_finalize); + +static unsigned int db5500_bootargs_memmap_modem_start; +static unsigned int db5500_bootargs_memmap_modem_total_size; + +static unsigned int db5500_mloader_shm_total_size; +module_param_named(shm_total_size, db5500_mloader_shm_total_size, uint, 0600); +MODULE_PARM_DESC(shm_total_size, "Total Size of SHM shared memory"); + +static int __init db5500_bootargs_memmap(char *str) +{ + char start_val_str[10]; + char *next_val_str; + int ret; + + next_val_str = strchr(str, '$'); + if (next_val_str == NULL) + return -EINVAL; + strncpy(start_val_str, str, next_val_str - str); + ret = strict_strtoul(start_val_str, 0, + &db5500_bootargs_memmap_modem_total_size); + if (ret < 0) + return -EINVAL; + + ret = strict_strtoul(next_val_str + 1, 0, + &db5500_bootargs_memmap_modem_start); + if (ret < 0) + return -EINVAL; + + return 1; +} +__setup("memmap=", db5500_bootargs_memmap); + +static int __init db5500_bootargs_shm_total_size(char *str) +{ + int ret; + ret = strict_strtoul(str, 0, &db5500_mloader_shm_total_size); + if (ret < 0) + return -EINVAL; + return 1; +} +__setup("mloader.shm_total_size=", db5500_bootargs_shm_total_size); + +static int __exit db5500_mloader_remove(struct platform_device *pdev) +{ + sysfs_remove_file(&pdev->dev.kobj, &dev_attr_addr.attr); + sysfs_remove_file(&pdev->dev.kobj, &dev_attr_finalize.attr); + + return 0; +} + + +static struct platform_driver db5500_mloader_driver = { + .driver = { + .name = "db5500_mloader", + }, + .remove = __exit_p(db5500_mloader_remove), +}; + +struct db5500_mloader { + struct work_struct work; + struct platform_device *pdev; +}; + +static void db5500_mloader_clean_up(struct work_struct *work) +{ + struct db5500_mloader *m = container_of(work, + struct db5500_mloader, + work); + + /* Remove this module */ + platform_device_unregister(m->pdev); + + platform_driver_unregister(&db5500_mloader_driver); + kfree(m); + +} + +static ssize_t db5500_mloader_sysfs_addr(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "0x%x 0x%x 0x%x\n", + db5500_bootargs_memmap_modem_start, + db5500_bootargs_memmap_modem_total_size, + db5500_mloader_shm_total_size); +} + +static ssize_t db5500_mloader_sysfs_finalize(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct db5500_mloader *m; + + m = kmalloc(sizeof(struct db5500_mloader), GFP_KERNEL); + + m->pdev = container_of(dev, + struct platform_device, + dev); + + INIT_WORK(&m->work, db5500_mloader_clean_up); + + /* The module can not remove itself while being in a sysfs function, + * it has to use a workqueue. + */ + schedule_work(&m->work); + + return count; +} + +static void db5500_mloader_release(struct device *dev) +{ + /* Nothing to release */ +} + +static int __init db5500_mloader_probe(struct platform_device *pdev) +{ + int ret = 0; + + pdev->dev.release = db5500_mloader_release; + + ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_addr.attr); + if (ret) + return ret; + ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_finalize.attr); + + if (ret) { + sysfs_remove_file(&pdev->dev.kobj, &dev_attr_addr.attr); + return ret; + } + + return 0; + +} + +static int __init db5500_mloader_init(void) +{ +/* + * mloader for Fairbanks. It exports the physical + * address where the modem side ELF should be located in a sysfs + * file to make it available for a user space utility. + * When the mLoader utility has picked up these settings, this module is no + * longer needed and can be removed by writing to sysfs finalize. + * + * The modem side should be loaded via mmap'ed /dev/mem + * + */ + + return platform_driver_probe(&db5500_mloader_driver, + db5500_mloader_probe); +} +module_init(db5500_mloader_init); + + +static void __exit mloader_exit(void) +{ + platform_driver_unregister(&db5500_mloader_driver); +} +module_exit(mloader_exit); + +MODULE_AUTHOR("Jonas Aaberg "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3 From b2e03084d11a4f2c11479c92d45010a05c93d950 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Fri, 14 Oct 2011 11:13:35 +0200 Subject: u5500 : kernel-doc for Mailbox Logical Driver Kernle-Doc created for u5500 Mailbox Logical Driver ST-Ericsson ID: 277198 Change-Id: I6e1298615a3943177fa05342a9ff8215e521fa72 Signed-off-by: Bibek Basu Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23718 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- Documentation/DocBook/u5500_LogicalMailbox.tmpl | 114 +++++++++++++++++++++ .../mach-ux500/include/mach/mbox_channels-db5500.h | 73 ++++++------- drivers/misc/mbox_channels-db5500.c | 38 ++++++- 3 files changed, 185 insertions(+), 40 deletions(-) create mode 100644 Documentation/DocBook/u5500_LogicalMailbox.tmpl diff --git a/Documentation/DocBook/u5500_LogicalMailbox.tmpl b/Documentation/DocBook/u5500_LogicalMailbox.tmpl new file mode 100644 index 00000000000..71a5d6c7c28 --- /dev/null +++ b/Documentation/DocBook/u5500_LogicalMailbox.tmpl @@ -0,0 +1,114 @@ + + + + + + u5500 Mailbox Logical Driver + + + + Bibek + Basu + +
+ bibek.basu@stericsson.com +
+ + + + + + 2011 + ST-Ericsson + + + + + Linux standard functions + + + + + + + + This documentation is free software; you can redistribute + it and/or modify it under the terms of the GNU General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later + version. + + + + This program is distributed in the hope that it will be + useful, but WITHOUT ANY WARRANTY; without even the implied + warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + + + You should have received a copy of the GNU General Public + License along with this program; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, + MA 02111-1307 USA + + + + For more details see the file COPYING in the source + distribution of Linux. + + + + + + + + Introduction + + This documentation describes the API provided by the U5500 Mailbox Logical Driver. + + + + + Known Bugs And Assumptions + + + + None + + + None. + + + + + + + + + Structures + + This chapter contains the autogenerated documentation of the structures which are + used in the U5500 Mailbox Logical Driver. + +!Iarch/arm/mach-ux500/include/mach/mbox_channels-db5500.h + + + + Public Functions Provided + + List of public interfaces in stmpe driver + +!Edrivers/misc/mbox_channels-db5500.c + + + + Internal Functions Provided + + This chapter contains the autogenerated documentation of the internal functions. + +!Idrivers/misc/mbox_channels-db5500.c + + + diff --git a/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h index 829b1708bf1..0b2fc604873 100644 --- a/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h +++ b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h @@ -12,27 +12,27 @@ #define MAILBOX_NR_OF_DATAWORDS 3 /** - * mbox_channel_cb_t - Definition of the mailbox channel callback. - * @data: Pointer to the data. - * @length: Length of the data. - * @priv: The client's private data. - * - * This function will be called upon reception of complete mbox channel PDU - * or after completion of send operation. - */ + * mbox_channel_cb_t - Definition of the mailbox channel callback. + * @data: Pointer to the data. + * @length: Length of the data. + * @priv: The client's private data. + * + * This function will be called upon reception of complete mbox channel PDU + * or after completion of send operation. + */ typedef void mbox_channel_cb_t (u32 *data, u32 length, void *priv); /** - * mbox_channel_msg - Definition of mbox channel message - * @channel: Channel number. - * @data: Pointer to data to be sent. - * @length: Length of data to be sent. - * @cb: Pointer to the callback function to be called when send - * operation will be finished. - * @priv: The client's private data. - * - * This structure describes mailbox channel message. - */ + * struct mbox_channel_msg - Definition of mbox channel message + * @channel: Channel number. + * @data: Pointer to data to be sent. + * @length: Length of data to be sent. + * @cb: Pointer to the callback function to be called when send + * operation will be finished. + * @priv: The client's private data. + * + * This structure describes mailbox channel message. + */ struct mbox_channel_msg { u16 channel; u32 *data; @@ -41,30 +41,31 @@ struct mbox_channel_msg { void *priv; }; -/** mbox_channel_register - Set up a given mailbox channel. - * @channel: Mailbox channel number. - * @cb: Pointer to the callback function to be called when a new message - * is received. - * @priv: Client user data which will be returned in the callback. - * - * Returns 0 on success or a negative error code on error. - */ +/** + * mbox_channel_register - Set up a given mailbox channel. + * @channel: Mailbox channel number. + * @cb: Pointer to the callback function to be called when a new message + * is received. + * @priv: Client user data which will be returned in the callback. + * + * Returns 0 on success or a negative error code on error. + */ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv); /** - * mbox_channel_send - Send data on given mailbox channel. - * @msg: Mailbox channel message to be sent. - * - * Returns 0 on success or a negative error code on error. - */ + * mbox_channel_send - Send data on given mailbox channel. + * @msg: Mailbox channel message to be sent. + * + * Returns 0 on success or a negative error code on error. + */ int mbox_channel_send(struct mbox_channel_msg *msg); /** - * mbox_channel_revoke_messages - Revoke messages on given mailbox channel. - * @channel: Mailbox channel number. - * - * Returns 0 on success or a negative error code on error. - */ + * mbox_channel_revoke_messages - Revoke messages on given mailbox channel. + * @channel: Mailbox channel number. + * + * Returns 0 on success or a negative error code on error. + */ int mbox_channel_revoke_messages(u16 channel); #endif /*INC_STE_MBOX_H*/ diff --git a/drivers/misc/mbox_channels-db5500.c b/drivers/misc/mbox_channels-db5500.c index 74fdfa7aaae..64aaa29cc4f 100644 --- a/drivers/misc/mbox_channels-db5500.c +++ b/drivers/misc/mbox_channels-db5500.c @@ -579,6 +579,17 @@ static void mbox_cb(u32 mbox_msg, void *priv) } } +/** + * mbox_channel_register() - Registers for a channel + * @channel: Channel Number. + * @cb: Pointer to function pointer mbox_channel_cb_t + * @priv: Pointer to private data + * + * This routine is used to register for a logical channel. + * It first does sanity check on the requested channel availability + * and parameters. Then it prepares internal entry for the channel. + * And send a OPEN request for that channel. + */ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) { struct channel_status *rx_chan; @@ -668,6 +679,17 @@ exit: } EXPORT_SYMBOL(mbox_channel_register); +/** + * mbox_channel_send() - Send messages + * @msg: Pointer to mbox_channel_msg data structure. + * + * This routine is used to send messages over the registered logical + * TX channel. It first does sanity check on the message paramenters. + * It registered channel is not found then it just registers for that + * channel. If channel found, it puts the message to the pending list. + * If channel is OPEN, it then pushes the message to the mailbox in + * FIFO manner from the pending list. + */ int mbox_channel_send(struct mbox_channel_msg *msg) { struct list_head *pos, *tx_list; @@ -773,7 +795,15 @@ static void revoke_pending_msgs(struct channel_status *tx_chan) } } -/* Clear all pending messages from TX channel */ +/** + * mbox_channel_revoke_messages() - Revoke pending messages + * @channel: Channel on which action to be taken. + * + * This routine Clear all pending messages from TX channel + * It searches for the channel.Checks if there is pending + * messages.Calls if tehre is any registered function. And + * deletes the messages for the pending list. + */ int mbox_channel_revoke_messages(u16 channel) { struct list_head *pos, *tx_list; @@ -837,14 +867,14 @@ static int registration_done; * struct mboxtest_data - mbox test via debugfs information * @rx_buff: Buffer for incomming data * @rx_pointer: Ptr to actual RX data buff - * @tx_buff Buffer for outgoing data + * @tx_buff: Buffer for outgoing data * @tx_pointer: Ptr to actual TX data buff * @tx_done: TX Transfer done indicator * @rx_done: RX Transfer done indicator - * @received Received words + * @received: Received words * @xfer_words: Num of bytes in actual trf * @xfers: Number of transfers - * @words Number of total words + * @words: Number of total words * @channel: Channel test number */ struct mboxtest_data { -- cgit v1.2.3 From 32147dd6ff322acea442c93e00350f01fb196f3d Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Fri, 14 Oct 2011 12:02:54 +0200 Subject: arm: ux500: common dbx500 prcmu driver api This patch updates the PRCMU driver API to be the same (as far as possible) in U8500 and U4500. - has been renamed . - The platform specific APIs have moved to and (but these should not be directly included). - The PRCMU QoS API has been put in . ST Ericsson ID: 334772 ST Ericsson FOSS-OUT ID: trivial ST Ericsson Linux next: 318371 Change-Id: I6ce117ec35ebf2e987178ccacce09afb554d2736 Signed-off-by: Mattias Nilsson Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23863 Reviewed-by: Jonas ABERG --- drivers/misc/shrm/shrm_protocol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c index 0598c62812f..567c9b93d5f 100644 --- a/drivers/misc/shrm/shrm_protocol.c +++ b/drivers/misc/shrm/shrm_protocol.c @@ -16,7 +16,7 @@ #include #include #include -#include +#include #include #include #include -- cgit v1.2.3 From 3ce21a2330d52a43f36fba7a75ceb2ebf9712405 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Tue, 31 May 2011 15:49:11 +0530 Subject: u5500 : Change flag to GFP_ATOMIC for memory req In interrupt handler one should request for memory with flag as GFP_ATOMIC ST-Ericsson Linux next: 336280 ST-Ericsson ID: 343229 ST-Ericsson FOSS-OUT ID: N/00201-FEA 212 8003 Signed-off-by: Bibek Basu Change-Id: Ic5510e48f6e4d7acbdfa3ac681ecd2fac1e60e46 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/24222 Reviewed-by: QATEST Reviewed-by: Linus WALLEIJ Reviewed-by: Martin PERSSON Reviewed-by: Srinidhi KASAGAR --- drivers/misc/mbox_channels-db5500.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/mbox_channels-db5500.c b/drivers/misc/mbox_channels-db5500.c index 64aaa29cc4f..1fb883f3296 100644 --- a/drivers/misc/mbox_channels-db5500.c +++ b/drivers/misc/mbox_channels-db5500.c @@ -475,7 +475,7 @@ static void handle_open_msg(u16 channel, u8 mbox_id) schedule_work(&tx_chan->open_msg); } else { /* No tx channel found on the list, allocate new element */ - tx_chan = kzalloc(sizeof(*tx_chan), GFP_KERNEL); + tx_chan = kzalloc(sizeof(*tx_chan), GFP_ATOMIC); if (tx_chan == NULL) { dev_err(&channels.pdev->dev, "failed to allocate memory\n"); -- cgit v1.2.3 From ad430828f1c83f9358e19361d8a1806c87806d19 Mon Sep 17 00:00:00 2001 From: "Sesahgiri.Holi" Date: Thu, 2 Jun 2011 10:12:35 +0530 Subject: mach-ux500: Adapt mloader to new mem layout ST-Ericsson ID: AP 340293 ST-Ericsson FOSS-OUT ID: NA Signed-off-by: Sesahgiri.Holi Change-Id: I6e470258e5d0794649bdbfa8fe469984531f8051 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/24505 Reviewed-by: Martin PERSSON Reviewed-by: QATEST Reviewed-by: Preetham-rao K Tested-by: Preetham-rao K Reviewed-by: Srinidhi KASAGAR --- arch/arm/mach-ux500/mloader-db5500.c | 28 +++++++--------------------- 1 file changed, 7 insertions(+), 21 deletions(-) diff --git a/arch/arm/mach-ux500/mloader-db5500.c b/arch/arm/mach-ux500/mloader-db5500.c index 946a0ff490d..7798a1646d4 100644 --- a/arch/arm/mach-ux500/mloader-db5500.c +++ b/arch/arm/mach-ux500/mloader-db5500.c @@ -31,29 +31,15 @@ static unsigned int db5500_mloader_shm_total_size; module_param_named(shm_total_size, db5500_mloader_shm_total_size, uint, 0600); MODULE_PARM_DESC(shm_total_size, "Total Size of SHM shared memory"); -static int __init db5500_bootargs_memmap(char *str) +static int __init db5500_bootargs_modem_memmap(char *p) { - char start_val_str[10]; - char *next_val_str; - int ret; - - next_val_str = strchr(str, '$'); - if (next_val_str == NULL) - return -EINVAL; - strncpy(start_val_str, str, next_val_str - str); - ret = strict_strtoul(start_val_str, 0, - &db5500_bootargs_memmap_modem_total_size); - if (ret < 0) - return -EINVAL; + db5500_bootargs_memmap_modem_total_size = memparse(p, &p); + if (*p == '@') + db5500_bootargs_memmap_modem_start = memparse(p + 1, &p); - ret = strict_strtoul(next_val_str + 1, 0, - &db5500_bootargs_memmap_modem_start); - if (ret < 0) - return -EINVAL; - - return 1; + return 0; } -__setup("memmap=", db5500_bootargs_memmap); +early_param("mem_modem", db5500_bootargs_modem_memmap); static int __init db5500_bootargs_shm_total_size(char *str) { @@ -63,7 +49,7 @@ static int __init db5500_bootargs_shm_total_size(char *str) return -EINVAL; return 1; } -__setup("mloader.shm_total_size=", db5500_bootargs_shm_total_size); +early_param("mloader.shm_total_size", db5500_bootargs_shm_total_size); static int __exit db5500_mloader_remove(struct platform_device *pdev) { -- cgit v1.2.3 From 004eef269924da36be89b177085bc50fa8ddc8c4 Mon Sep 17 00:00:00 2001 From: Jonas Aaberg Date: Wed, 1 Jun 2011 08:20:32 +0200 Subject: misc: shrm: Remove u8500 ED support ST-Ericsson Linux next: Not tested, ask SSM for ER ST-Ericsson ID: 342987 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I10725c885b3492014f5ee6006e188d569383960b Signed-off-by: Jonas Aaberg Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/24278 Reviewed-by: QATEST Reviewed-by: Hemant-vilas RAMDASI Reviewed-by: Kumar A SANGHVI --- drivers/misc/shrm/Kconfig | 6 ------ drivers/misc/shrm/shrm_protocol.c | 8 ++------ 2 files changed, 2 insertions(+), 12 deletions(-) diff --git a/drivers/misc/shrm/Kconfig b/drivers/misc/shrm/Kconfig index fffee1c703e..6bafdeec5b9 100644 --- a/drivers/misc/shrm/Kconfig +++ b/drivers/misc/shrm/Kconfig @@ -14,12 +14,6 @@ choice depends on U8500_SHRM default SHRM_V1_UPDATES_VERSION - config SHRM_ED_V1_VERSION - depends on U8500_SHRM - bool "SHRM ED / V1 " - help - Modem Images with ED/V1 updates - config SHRM_V1_UPDATES_VERSION depends on U8500_SHRM bool "SHRM V1 UPDATES" diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c index 567c9b93d5f..315d4b7ff6e 100644 --- a/drivers/misc/shrm/shrm_protocol.c +++ b/drivers/misc/shrm/shrm_protocol.c @@ -37,7 +37,6 @@ static u8 recieve_audio_msg[8*1024]; static received_msg_handler rx_common_handler; static received_msg_handler rx_audio_handler; static struct hrtimer timer; -static char is_earlydrop; struct sock *shrm_nl_sk; static char shrm_common_tx_state = SHRM_SLEEP_STATE; @@ -698,11 +697,8 @@ int shrm_protocol_init(struct shrm_dev *shrm, rx_audio_handler = audio_rx_handler; atomic_set(&ac_sleep_disable_count, 0); - is_earlydrop = cpu_is_u8500ed(); - if (is_earlydrop != 0x01) { - hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - timer.function = callback; - } + hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer.function = callback; shrm->shm_common_ch_wr_wq = create_singlethread_workqueue ("shm_common_channel_irq"); -- cgit v1.2.3 From 1911c36f976867288bbaaf924419ba9421f9e779 Mon Sep 17 00:00:00 2001 From: Robert Marklund Date: Thu, 23 Jun 2011 13:27:23 +0200 Subject: misc: shrm: Update for header file changes 3.0 Change-Id: I7fa83c559bb65115ca3117a8df092d4f169d2390 Signed-off-by: Robert Marklund --- drivers/char/shrm_char.c | 1 + drivers/misc/shrm/modem_shrm_driver.c | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c index 6a6b3d7245a..6375d7f1ea3 100644 --- a/drivers/char/shrm_char.c +++ b/drivers/char/shrm_char.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include diff --git a/drivers/misc/shrm/modem_shrm_driver.c b/drivers/misc/shrm/modem_shrm_driver.c index 29368950256..4f6145f9d01 100644 --- a/drivers/misc/shrm/modem_shrm_driver.c +++ b/drivers/misc/shrm/modem_shrm_driver.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include #include -- cgit v1.2.3 From c59431cf9c6eecee49beb26a208ae5597238e5a7 Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Mon, 16 May 2011 20:56:25 +0530 Subject: drivers: Add Modem Access Framework Adds Modem Access Framework, which allows for registering platform specific modem access mechanisms. The framework also exposes APIs for client drivers for getting and releasing access to modem, regardless of the underlying platform specific access mechanism. ST-Ericsson ID: CR329459 Change-Id: I643c56892e4423ec27467cbcfe8a22586c1e3f6a Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23553 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- drivers/Kconfig | 1 + drivers/Makefile | 1 + drivers/modem/Kconfig | 7 + drivers/modem/Makefile | 2 + drivers/modem/modem_access.c | 416 +++++++++++++++++++++++++++++++++++++ include/linux/modem/modem.h | 63 ++++++ include/linux/modem/modem_client.h | 53 +++++ 7 files changed, 543 insertions(+) create mode 100644 drivers/modem/Kconfig create mode 100644 drivers/modem/Makefile create mode 100644 drivers/modem/modem_access.c create mode 100644 include/linux/modem/modem.h create mode 100644 include/linux/modem/modem_client.h diff --git a/drivers/Kconfig b/drivers/Kconfig index 95b9e7eefad..70c99568fa0 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -130,4 +130,5 @@ source "drivers/iommu/Kconfig" source "drivers/virt/Kconfig" +source "drivers/modem/Kconfig" endmenu diff --git a/drivers/Makefile b/drivers/Makefile index 7fa433a7030..57a017cfce1 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -97,6 +97,7 @@ obj-$(CONFIG_CPU_FREQ) += cpufreq/ obj-$(CONFIG_CPU_IDLE) += cpuidle/ obj-$(CONFIG_MMC) += mmc/ obj-$(CONFIG_MEMSTICK) += memstick/ +obj-$(CONFIG_MODEM) += modem/ obj-y += leds/ obj-$(CONFIG_INFINIBAND) += infiniband/ obj-$(CONFIG_SGI_SN) += sn/ diff --git a/drivers/modem/Kconfig b/drivers/modem/Kconfig new file mode 100644 index 00000000000..000181cdb3d --- /dev/null +++ b/drivers/modem/Kconfig @@ -0,0 +1,7 @@ +config MODEM + bool "Modem Access Framework" + default n + help + Add support for Modem Access Framework. It allows different + platform specific drivers to register modem access mechanisms + and allows transparent access to modem to the client drivers. diff --git a/drivers/modem/Makefile b/drivers/modem/Makefile new file mode 100644 index 00000000000..0526714bebd --- /dev/null +++ b/drivers/modem/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_MODEM) := modem_access.o + diff --git a/drivers/modem/modem_access.c b/drivers/modem/modem_access.c new file mode 100644 index 00000000000..7337029c251 --- /dev/null +++ b/drivers/modem/modem_access.c @@ -0,0 +1,416 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * License Terms: GNU General Public License v2 + * Author: Kumar Sanghvi + * + * Heavily adapted from Regulator framework. + * Provides mechanisms for registering platform specific access + * mechanisms for modem. + * Also, exposes APIs for gettng/releasing the access and even + * query the access status, and the modem usage status. + */ +#include +#include +#include +#include + +static DEFINE_MUTEX(modem_list_mutex); +static LIST_HEAD(modem_list); + +struct modem { + struct device *dev; + struct list_head list; + char *modem_name; + struct device_attribute dev_attr; + struct modem_dev *mdev; + atomic_t use; +}; + +static const char *mdev_get_name(struct modem_dev *mdev) +{ + if (mdev->desc->name) + return mdev->desc->name; + else + return ""; +} + +static int _modem_is_requested(struct modem_dev *mdev) +{ + /* If we don't know then assume that the modem is always on */ + if (!mdev->desc->ops->is_requested) + return 0; + + return mdev->desc->ops->is_requested(mdev); +} + +/** + * modem_is_requested - check if modem access is requested + * @modem: modem device + * + * Checks whether modem is accessed or not by querying + * the underlying platform specific modem access + * implementation. + */ +int modem_is_requested(struct modem *modem) +{ + int ret; + + mutex_lock(&modem->mdev->mutex); + ret = _modem_is_requested(modem->mdev); + mutex_unlock(&modem->mdev->mutex); + + return ret; +} +EXPORT_SYMBOL(modem_is_requested); + +static int _modem_request(struct modem_dev *mdev) +{ + int ret; + + if (++mdev->use_count == 1) { + ret = _modem_is_requested(mdev); + if (ret == 0) + mdev->desc->ops->request(mdev); + } + + return 0; +} + +/** + * modem_request - Request access the modem + * @modem: modem device + * + * API to access the modem. It keeps a client + * specific check on whether the particular modem + * requested is accessed or not. + */ +void modem_request(struct modem *modem) +{ + struct modem_dev *mdev = modem->mdev; + int ret = 0; + + + mutex_lock(&mdev->mutex); + if (atomic_read(&modem->use) == 1) { + mutex_unlock(&mdev->mutex); + return; + } + ret = _modem_request(mdev); + if (ret == 0) + atomic_set(&modem->use, 1); + mutex_unlock(&mdev->mutex); +} +EXPORT_SYMBOL(modem_request); + +static int _modem_release(struct modem_dev *mdev) +{ + if (WARN(mdev->use_count <= 0, + "unbalanced releases for %s\n", + mdev_get_name(mdev))) + return -EIO; + + if (--mdev->use_count == 0) + mdev->desc->ops->release(mdev); + + return 0; +} + +/** + * modem_release - Release access to modem + * @modem: modem device + * + * Releases accesss to the modem. It keeps a client + * specific check on whether a particular modem + * is released or not. + */ +void modem_release(struct modem *modem) +{ + struct modem_dev *mdev = modem->mdev; + int ret = 0; + + mutex_lock(&mdev->mutex); + if (atomic_read(&modem->use) == 0) { + mutex_unlock(&mdev->mutex); + return; + } + ret = _modem_release(mdev); + if (ret == 0) + atomic_set(&modem->use, 0); + mutex_unlock(&mdev->mutex); +} +EXPORT_SYMBOL(modem_release); + +/** + * modem_get_usage - Check if particular client is using modem + * @modem: modem device + * + * Checks whether the particular client is using access to modem. + * This API could be used by client drivers in making their + * suspend decisions. + */ +int modem_get_usage(struct modem *modem) +{ + return atomic_read(&modem->use); +} +EXPORT_SYMBOL(modem_get_usage); + +static struct modem *create_modem(struct modem_dev *mdev, + struct device *dev, + const char *id) +{ + struct modem *modem; + + modem = kzalloc(sizeof(*modem), GFP_KERNEL); + if (modem == NULL) + return NULL; + + mutex_lock(&mdev->mutex); + modem->mdev = mdev; + modem->dev = dev; + list_add(&modem->list, &mdev->client_list); + + mutex_unlock(&mdev->mutex); + return modem; + +} + +static struct modem *_modem_get(struct device *dev, const char *id, + int exclusive) +{ + struct modem_dev *mdev_ptr; + struct modem *modem = ERR_PTR(-ENODEV); + int ret; + + if (id == NULL) { + pr_err("modem_get with no identifier\n"); + return modem; + } + + mutex_lock(&modem_list_mutex); + list_for_each_entry(mdev_ptr, &modem_list, modem_list) { + if (strcmp(mdev_get_name(mdev_ptr), id) == 0) + goto found; + } + + return ERR_PTR(-ENODEV); + +found: + if (!try_module_get(mdev_ptr->owner)) + goto out; + + modem = create_modem(mdev_ptr, dev, id); + if (modem == NULL) { + modem = ERR_PTR(-ENOMEM); + module_put(mdev_ptr->owner); + } + + mdev_ptr->open_count++; + ret = _modem_is_requested(mdev_ptr); + if (ret) + mdev_ptr->use_count = 1; + else + mdev_ptr->use_count = 0; + +out: + mutex_unlock(&modem_list_mutex); + return modem; + +} + +/** + * modem_get - Get reference to a particular platform specific modem + * @dev: device + * @id: modem device name + * + * Get reference to a particular modem device. + */ +struct modem *modem_get(struct device *dev, const char *id) +{ + return _modem_get(dev, id, 0); +} +EXPORT_SYMBOL(modem_get); + +/** + * modem_put - Release reference to a modem device + * @modem: modem device + * + * Release reference to a modem device. + */ +void modem_put(struct modem *modem) +{ + struct modem_dev *mdev; + + if (modem == NULL || IS_ERR(modem)) + return; + + mutex_lock(&modem_list_mutex); + mdev = modem->mdev; + + list_del(&modem->list); + kfree(modem); + + mdev->open_count--; + + module_put(mdev->owner); + mutex_unlock(&modem_list_mutex); +} +EXPORT_SYMBOL(modem_put); + +static ssize_t modem_print_state(char *buf, int state) +{ + if (state > 0) + return sprintf(buf, "accessed\n"); + else if (state == 0) + return sprintf(buf, "released\n"); + else + return sprintf(buf, "unknown\n"); +} + +static ssize_t modem_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct modem_dev *mdev = dev_get_drvdata(dev); + ssize_t ret; + + mutex_lock(&mdev->mutex); + ret = modem_print_state(buf, _modem_is_requested(mdev)); + mutex_unlock(&mdev->mutex); + + return ret; +} +static DEVICE_ATTR(state, 0444, modem_state_show, NULL); + +static ssize_t modem_use_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct modem_dev *mdev = dev_get_drvdata(dev); + struct modem *mod; + size_t size = 0; + + list_for_each_entry(mod, &mdev->client_list, list) { + if (mod->dev != NULL) + size += sprintf((buf + size), "%s (%d)\n", + dev_name(mod->dev), atomic_read(&mod->use)); + else + size += sprintf((buf + size), "unknown (%d)\n", + atomic_read(&mod->use)); + } + size += sprintf((buf + size), "\n"); + + return size; +} +static DEVICE_ATTR(use, 0444, modem_use_show, NULL); + +static ssize_t modem_name_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct modem_dev *mdev = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", mdev_get_name(mdev)); +} +static DEVICE_ATTR(name, 0444, modem_name_show, NULL); + +static ssize_t modem_num_active_users_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct modem_dev *mdev = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", mdev->use_count); +} +static DEVICE_ATTR(num_active_users, 0444, modem_num_active_users_show, NULL); + +static int add_modem_attributes(struct modem_dev *mdev) +{ + struct device *dev = &mdev->dev; + struct modem_ops *ops = mdev->desc->ops; + int status = 0; + + status = device_create_file(dev, &dev_attr_use); + if (status < 0) + return status; + + status = device_create_file(dev, &dev_attr_name); + if (status < 0) + return status; + + status = device_create_file(dev, &dev_attr_num_active_users); + if (status < 0) + return status; + + if (ops->is_requested) { + status = device_create_file(dev, &dev_attr_state); + if (status < 0) + return status; + } + + return 0; +} + +/** + * modem_register - register a modem + * @modem_desc: - description for modem + * @dev: - device + * @driver_data:- driver specific data + * + * Register a modem with the modem access framework, so that + * it could be used by client drivers for accessing the + * modem. + */ +struct modem_dev *modem_register(struct modem_desc *modem_desc, + struct device *dev, + void *driver_data) +{ + static atomic_t modem_no = ATOMIC_INIT(0); + struct modem_dev *mdev; + int ret; + + if (modem_desc == NULL) + return ERR_PTR(-EINVAL); + + if (modem_desc->name == NULL || modem_desc->ops == NULL) + return ERR_PTR(-EINVAL); + + mdev = kzalloc(sizeof(struct modem_dev), GFP_KERNEL); + if (mdev == NULL) + return ERR_PTR(-ENOMEM); + + mutex_lock(&modem_list_mutex); + + mutex_init(&mdev->mutex); + mdev->modem_data = driver_data; + mdev->owner = modem_desc->owner; + mdev->desc = modem_desc; + INIT_LIST_HEAD(&mdev->client_list); + INIT_LIST_HEAD(&mdev->modem_list); + BLOCKING_INIT_NOTIFIER_HEAD(&mdev->notifier); + + /* mdev->dev.class = &modem_class;*/ + mdev->dev.parent = dev; + dev_set_name(&mdev->dev, "modem.%d", atomic_inc_return(&modem_no) - 1); + ret = device_register(&mdev->dev); + if (ret != 0) + goto clean; + + dev_set_drvdata(&mdev->dev, mdev); + + ret = add_modem_attributes(mdev); + if (ret < 0) + goto backoff; + + list_add(&mdev->modem_list, &modem_list); + +out: + mutex_unlock(&modem_list_mutex); + return mdev; + +backoff: + device_unregister(&mdev->dev); + mdev = ERR_PTR(ret); + goto out; + +clean: + kfree(mdev); + mdev = ERR_PTR(ret); + goto out; +} +EXPORT_SYMBOL(modem_register); diff --git a/include/linux/modem/modem.h b/include/linux/modem/modem.h new file mode 100644 index 00000000000..c9614a9b061 --- /dev/null +++ b/include/linux/modem/modem.h @@ -0,0 +1,63 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * License Terms: GNU General Public License v2 + * Author: Kumar Sanghvi + * + * Heavily adapted from Regulator framework + */ +#ifndef __MODEM_H__ +#define __MODEM_H__ + +#include + +struct modem_dev; + +struct modem_ops { + void (*request)(struct modem_dev *); + void (*release)(struct modem_dev *); + int (*is_requested)(struct modem_dev *); +}; + +struct modem_desc { + const char *name; + int id; + struct modem_ops *ops; + struct module *owner; +}; + +struct modem_dev { + struct modem_desc *desc; + int use_count; + int open_count; + int exclusive; + + struct list_head modem_list; + + struct list_head client_list; + + struct blocking_notifier_head notifier; + struct mutex mutex; + struct module *owner; + struct device dev; + void *modem_data; +}; + +#ifdef CONFIG_MODEM +struct modem_dev *modem_register(struct modem_desc *modem_desc, + struct device *dev, + void *driver_data); +void modem_unregister(struct modem_dev *mdev); + +#else +static inline struct modem_dev *modem_register(struct modem_desc *modem_desc, + struct device *dev, void *driver_data) +{ + return NULL; +} + +static inline void modem_unregister(struct modem_dev *mdev) +{ +} +#endif +#endif /* __MODEM_H__ */ diff --git a/include/linux/modem/modem_client.h b/include/linux/modem/modem_client.h new file mode 100644 index 00000000000..21f04798490 --- /dev/null +++ b/include/linux/modem/modem_client.h @@ -0,0 +1,53 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * License Terms: GNU General Public License v2 + * Author: Kumar Sanghvi + * + * Heavily adapted from Regulator framework + */ +#ifndef __MODEM_CLIENT_H__ +#define __MODEM_CLIENT_H__ + +#include + +struct modem; + +#ifdef CONFIG_MODEM +struct modem *modem_get(struct device *dev, const char *id); +void modem_put(struct modem *modem); +void modem_request(struct modem *modem); +void modem_release(struct modem *modem); +int modem_is_requested(struct modem *modem); +int modem_get_usage(struct modem *modem); + +#else + +static inline struct modem *modem_get(struct device *dev, const char *id) +{ + return NULL; +} + +static inline void modem_put(struct modem *modem) +{ +} + +static inline void modem_request(struct modem *modem) +{ +} + +static inline void modem_release(struct modem *modem) +{ +} + +static inline int modem_is_requested(struct modem *modem) +{ + return 0; +} + +static inline int modem_get_usage(struct modem *modem) +{ + return 0; +} +#endif +#endif /* __MODEM_CLIENT_H__ */ -- cgit v1.2.3 From 183a0c078be46b0f2d6d9b8aaed0654a68e4f7d9 Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Mon, 16 May 2011 21:00:49 +0530 Subject: drivers: modem: Add modem access driver for STE U8500 Adds platform driver which implements mechanism for accessing modem on STE U8500 platform which uses Shared Memory for communicating between Modem and Application processor. The driver also registers itself with the Modem Access framework. ST-Ericsson ID: CR329459 Change-Id: Id5bc18f6f974b026f9be2d3e2756e03417e01e07 Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23554 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- drivers/modem/Kconfig | 19 +++++++-- drivers/modem/Makefile | 3 +- drivers/modem/modem_u8500.c | 94 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 112 insertions(+), 4 deletions(-) create mode 100644 drivers/modem/modem_u8500.c diff --git a/drivers/modem/Kconfig b/drivers/modem/Kconfig index 000181cdb3d..a23b5c90e5e 100644 --- a/drivers/modem/Kconfig +++ b/drivers/modem/Kconfig @@ -2,6 +2,19 @@ config MODEM bool "Modem Access Framework" default n help - Add support for Modem Access Framework. It allows different - platform specific drivers to register modem access mechanisms - and allows transparent access to modem to the client drivers. + Add support for Modem Access Framework. It allows different + platform specific drivers to register modem access mechanisms + and allows transparent access to modem to the client drivers. + + If unsure, say N. + +config MODEM_U8500 + bool "Modem Access driver for STE U8500 platform" + depends on MODEM + default n + help + Add support for Modem Access driver on STE U8500 platform which + uses Shared Memroy as IPC mechanism between Modem processor and + Application processor. + + If unsure, say N. diff --git a/drivers/modem/Makefile b/drivers/modem/Makefile index 0526714bebd..57b50916c79 100644 --- a/drivers/modem/Makefile +++ b/drivers/modem/Makefile @@ -1,2 +1,3 @@ -obj-$(CONFIG_MODEM) := modem_access.o +obj-$(CONFIG_MODEM) := modem_access.o +obj-$(CONFIG_MODEM_U8500) += modem_u8500.o diff --git a/drivers/modem/modem_u8500.c b/drivers/modem/modem_u8500.c new file mode 100644 index 00000000000..20b5fe78ef7 --- /dev/null +++ b/drivers/modem/modem_u8500.c @@ -0,0 +1,94 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * License Terms: GNU General Public License v2 + * Author: Kumar Sanghvi + * + * Platform driver implementing access mechanisms to modem + * on U8500 which uses Shared Memroy as IPC between Application + * Processor and Modem processor. + */ +#include +#include +#include +#include + +static void u8500_modem_request(struct modem_dev *mdev) +{ + prcmu_ac_wake_req(); +} + +static void u8500_modem_release(struct modem_dev *mdev) +{ + prcmu_ac_sleep_req(); +} + +static int u8500_modem_is_requested(struct modem_dev *mdev) +{ + return prcmu_is_ac_wake_requested(); +} + +static struct modem_ops u8500_modem_ops = { + .request = u8500_modem_request, + .release = u8500_modem_release, + .is_requested = u8500_modem_is_requested, +}; + +static struct modem_desc u8500_modem_desc = { + .name = "u8500-shrm-modem", + .id = 0, + .ops = &u8500_modem_ops, + .owner = THIS_MODULE, +}; + + +static int __devinit u8500_modem_probe(struct platform_device *pdev) +{ + struct modem_dev *mdev; + int err; + + mdev = modem_register(&u8500_modem_desc, &pdev->dev, + NULL); + if (IS_ERR(mdev)) { + err = PTR_ERR(mdev); + pr_err("failed to register %s: err %i\n", + u8500_modem_desc.name, err); + } + + return 0; +} + +static int __devexit u8500_modem_remove(struct platform_device *pdev) +{ + + return 0; +} + +static struct platform_driver u8500_modem_driver = { + .driver = { + .name = "u8500-modem", + .owner = THIS_MODULE, + }, + .probe = u8500_modem_probe, + .remove = __devexit_p(u8500_modem_remove), +}; + +static int __init u8500_modem_init(void) +{ + int ret; + + ret = platform_driver_register(&u8500_modem_driver); + if (ret < 0) { + printk(KERN_ERR "u8500_modem: platform driver reg failed\n"); + return -ENODEV; + } + + return 0; +} + +static void __exit u8500_modem_exit(void) +{ + platform_driver_unregister(&u8500_modem_driver); +} + +arch_initcall(u8500_modem_init); -- cgit v1.2.3 From 30065928806825c7dcad35fbc8f66ec6ba14cb1a Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Mon, 16 May 2011 21:06:06 +0530 Subject: u8500: shrm: Adapt to use Modem Access framework Removes calls to prcmu driver APIs. Uses the modem access framework to get/release access to modem. ST-Ericsson ID: CR329459 Change-Id: I7933c0b41863156820a6239ff2cb74e4ed26c3d7 Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23555 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- arch/arm/mach-ux500/include/mach/shrm_driver.h | 2 ++ drivers/misc/shrm/modem_shrm_driver.c | 6 ++++++ drivers/misc/shrm/shrm_protocol.c | 15 ++++++++------- 3 files changed, 16 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-ux500/include/mach/shrm_driver.h b/arch/arm/mach-ux500/include/mach/shrm_driver.h index 36bb8413ad9..71b3fbcf229 100644 --- a/arch/arm/mach-ux500/include/mach/shrm_driver.h +++ b/arch/arm/mach-ux500/include/mach/shrm_driver.h @@ -20,6 +20,7 @@ #include #include #include +#include #include @@ -115,6 +116,7 @@ struct shrm_dev { struct device *dev; struct net_device *ndev; + struct modem *modem; struct isa_driver_context *isa_context; struct workqueue_struct *shm_common_ch_wr_wq; struct workqueue_struct *shm_audio_ch_wr_wq; diff --git a/drivers/misc/shrm/modem_shrm_driver.c b/drivers/misc/shrm/modem_shrm_driver.c index 4f6145f9d01..a3c8d4bda1b 100644 --- a/drivers/misc/shrm/modem_shrm_driver.c +++ b/drivers/misc/shrm/modem_shrm_driver.c @@ -333,6 +333,12 @@ static int shrm_probe(struct platform_device *pdev) } shrm->dev = &pdev->dev; + shrm->modem = modem_get(shrm->dev, "u8500-shrm-modem"); + if (shrm->modem == NULL) { + dev_err(shrm->dev, " Could not retrieve the modem.\n"); + return -ENODEV; + } + /* initialise the SHM */ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) { diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c index 315d4b7ff6e..686bebcb451 100644 --- a/drivers/misc/shrm/shrm_protocol.c +++ b/drivers/misc/shrm/shrm_protocol.c @@ -20,6 +20,7 @@ #include #include #include +#include #define L2_HEADER_ISI 0x0 #define L2_HEADER_RPC 0x1 @@ -72,14 +73,14 @@ static void shm_ac_sleep_req_work(struct work_struct *work) { mutex_lock(&ac_state_mutex); if (atomic_read(&ac_sleep_disable_count) == 0) - prcmu_ac_sleep_req(); + modem_release(shm_dev->modem); mutex_unlock(&ac_state_mutex); } static void shm_ac_wake_req_work(struct work_struct *work) { mutex_lock(&ac_state_mutex); - prcmu_ac_wake_req(); + modem_request(shm_dev->modem); mutex_unlock(&ac_state_mutex); } @@ -463,7 +464,7 @@ void shm_ca_wake_req_work(struct work_struct *work) shm_fifo_init(shrm); mutex_lock(&ac_state_mutex); - prcmu_ac_wake_req(); + modem_request(shrm->modem); mutex_unlock(&ac_state_mutex); /* send ca_wake_ack_interrupt to CMU */ @@ -614,7 +615,7 @@ static void send_ac_msg_pend_notify_0_work(struct work_struct *work) mutex_lock(&ac_state_mutex); atomic_inc(&ac_sleep_disable_count); - prcmu_ac_wake_req(); + modem_request(shrm->modem); mutex_unlock(&ac_state_mutex); if (!get_host_accessport_val()) @@ -641,7 +642,7 @@ static void send_ac_msg_pend_notify_1_work(struct work_struct *work) mutex_lock(&ac_state_mutex); atomic_inc(&ac_sleep_disable_count); - prcmu_ac_wake_req(); + modem_request(shrm->modem); mutex_unlock(&ac_state_mutex); if (!get_host_accessport_val()) @@ -777,7 +778,6 @@ int shrm_protocol_init(struct shrm_dev *shrm, goto drop; } #endif - return 0; #ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET @@ -812,12 +812,13 @@ void shrm_protocol_deinit(struct shrm_dev *shrm) destroy_workqueue(shrm->shm_ac_wake_wq); destroy_workqueue(shrm->shm_ca_wake_wq); destroy_workqueue(shrm->shm_ac_sleep_wq); + modem_put(shrm->modem); } int get_ca_wake_req_state(void) { return ((atomic_read(&ac_sleep_disable_count) > 0) || - prcmu_is_ac_wake_requested()); + modem_get_usage(shm_dev->modem)); } irqreturn_t ca_wake_irq_handler(int irq, void *ctrlr) -- cgit v1.2.3 From fa536901f67ba812d99e169205efa259e51324e9 Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Thu, 26 May 2011 14:38:19 +0530 Subject: u8500: shrm: Move shrm to drivers/modem Moves shrm specific files from arch/arm/mach-ux500/mach/include and drivers/misc to include/linux/modem/shrm and drivers/modem/shrm respectively ST-Ericsson ID: CR329459 Change-Id: I3a08f83e5302429d51eb865ee1c5e4e0ec73e31b Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23980 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- Documentation/DocBook/shrm.tmpl | 10 +- arch/arm/mach-ux500/include/mach/shrm.h | 23 - arch/arm/mach-ux500/include/mach/shrm_config.h | 111 -- arch/arm/mach-ux500/include/mach/shrm_driver.h | 204 ---- arch/arm/mach-ux500/include/mach/shrm_net.h | 44 - arch/arm/mach-ux500/include/mach/shrm_private.h | 181 --- drivers/char/shrm_char.c | 8 +- drivers/misc/shrm/Kconfig | 43 - drivers/misc/shrm/Makefile | 11 - drivers/misc/shrm/modem_shrm_driver.c | 671 ----------- drivers/misc/shrm/shrm_driver.c | 1439 ----------------------- drivers/misc/shrm/shrm_fifo.c | 827 ------------- drivers/misc/shrm/shrm_protocol.c | 1191 ------------------- drivers/modem/Kconfig | 2 + drivers/modem/Makefile | 1 + drivers/modem/shrm/Kconfig | 43 + drivers/modem/shrm/Makefile | 11 + drivers/modem/shrm/modem_shrm_driver.c | 669 +++++++++++ drivers/modem/shrm/shrm_driver.c | 1439 +++++++++++++++++++++++ drivers/modem/shrm/shrm_fifo.c | 827 +++++++++++++ drivers/modem/shrm/shrm_protocol.c | 1191 +++++++++++++++++++ drivers/net/u8500_shrm.c | 10 +- include/linux/modem/shrm/shrm.h | 23 + include/linux/modem/shrm/shrm_config.h | 111 ++ include/linux/modem/shrm/shrm_driver.h | 202 ++++ include/linux/modem/shrm/shrm_net.h | 44 + include/linux/modem/shrm/shrm_private.h | 181 +++ 27 files changed, 4758 insertions(+), 4759 deletions(-) delete mode 100644 arch/arm/mach-ux500/include/mach/shrm.h delete mode 100644 arch/arm/mach-ux500/include/mach/shrm_config.h delete mode 100644 arch/arm/mach-ux500/include/mach/shrm_driver.h delete mode 100644 arch/arm/mach-ux500/include/mach/shrm_net.h delete mode 100644 arch/arm/mach-ux500/include/mach/shrm_private.h delete mode 100644 drivers/misc/shrm/Kconfig delete mode 100644 drivers/misc/shrm/Makefile delete mode 100644 drivers/misc/shrm/modem_shrm_driver.c delete mode 100644 drivers/misc/shrm/shrm_driver.c delete mode 100644 drivers/misc/shrm/shrm_fifo.c delete mode 100644 drivers/misc/shrm/shrm_protocol.c create mode 100644 drivers/modem/shrm/Kconfig create mode 100644 drivers/modem/shrm/Makefile create mode 100644 drivers/modem/shrm/modem_shrm_driver.c create mode 100644 drivers/modem/shrm/shrm_driver.c create mode 100644 drivers/modem/shrm/shrm_fifo.c create mode 100644 drivers/modem/shrm/shrm_protocol.c create mode 100644 include/linux/modem/shrm/shrm.h create mode 100644 include/linux/modem/shrm/shrm_config.h create mode 100644 include/linux/modem/shrm/shrm_driver.h create mode 100644 include/linux/modem/shrm/shrm_net.h create mode 100644 include/linux/modem/shrm/shrm_private.h diff --git a/Documentation/DocBook/shrm.tmpl b/Documentation/DocBook/shrm.tmpl index 7f21cd3f7dd..2773b821bf5 100644 --- a/Documentation/DocBook/shrm.tmpl +++ b/Documentation/DocBook/shrm.tmpl @@ -117,15 +117,15 @@ This Section lists the functions used internally by the SHRM driver to implement FIFO management. It physically reads/writes data to/from memory. -!Idrivers/misc/shrm/shrm_fifo.c +!Idrivers/modem/shrm/shrm_fifo.c This Section lists the functions used internally by the SHRM driver to implement the SHM protocol and handle all interrupt callback. -!Idrivers/misc/shrm/shrm_protocol.c +!Idrivers/modem/shrm/shrm_protocol.c This Section lists the functions used internally by the SHRM driver to implement Modem-Host communication L1 interface specifications. -!Idrivers/misc/shrm/modem_shrm_driver.c +!Idrivers/modem/shrm/modem_shrm_driver.c @@ -133,7 +133,7 @@ This Section lists some of the Data structure used by the SHRM driver. -!Iarch/arm/mach-ux500/include/mach/shrm_driver.h -!Iarch/arm/mach-ux500/include/mach/shrm_private.h +!Iinclude/linux/modem/shrm/shrm_driver.h +!Iinclude/linux/modem/shrm/shrm_private.h diff --git a/arch/arm/mach-ux500/include/mach/shrm.h b/arch/arm/mach-ux500/include/mach/shrm.h deleted file mode 100644 index 6deeeb16ba8..00000000000 --- a/arch/arm/mach-ux500/include/mach/shrm.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghavi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#ifndef __SHM_DRIVER_IF_H__ -#define __SHM_DRIVER_IF_H__ - -#include - -/* forward declaration */ -struct shrm_dev; - -typedef void (*rx_cb)(void *data, unsigned int length); -typedef void (*received_msg_handler)(unsigned char l2_header, - void *msg_ptr, unsigned int length, - struct shrm_dev *shrm); - -#endif diff --git a/arch/arm/mach-ux500/include/mach/shrm_config.h b/arch/arm/mach-ux500/include/mach/shrm_config.h deleted file mode 100644 index a82b35ef77b..00000000000 --- a/arch/arm/mach-ux500/include/mach/shrm_config.h +++ /dev/null @@ -1,111 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghavi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#ifndef __SHRM_CONFIG_H -#define __SHRM_CONFIG_H - - -/* -Note: modem need to define IPC as a non-cacheable area. -In Cortex R4 MPU requires that base address of NC area is aligned on a -region-sized boundary.On modem side, only 1 NC area can be defined, hence -the whole IPC area must be defined as NC (at least). - -*/ - -/* cache line size = 32bytes*/ -#define SHM_CACHE_LINE 32 -#define SHM_PTR_SIZE 4 - -/* FIFO 0 address configuration */ -/* ---------------------------- */ -/* 128KB */ -#define SHM_FIFO_0_SIZE (128*1024) - - -/* == APE addresses == */ -#ifdef CONFIG_SHRM_V1_UPDATES_VERSION -#define SHM_IPC_BASE_AMCU 0x06F80000 -#else -#define SHM_IPC_BASE_AMCU 0x06000000 -#endif - -/* offset pointers */ -#define SHM_ACFIFO_0_WRITE_AMCU SHM_IPC_BASE_AMCU -#define SHM_ACFIFO_0_READ_AMCU (SHM_ACFIFO_0_WRITE_AMCU + SHM_PTR_SIZE) -#define SHM_CAFIFO_0_WRITE_AMCU (SHM_ACFIFO_0_WRITE_AMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_0_READ_AMCU (SHM_CAFIFO_0_WRITE_AMCU + SHM_PTR_SIZE) -/* FIFO start */ -#define SHM_ACFIFO_0_START_AMCU (SHM_CAFIFO_0_WRITE_AMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_0_START_AMCU (SHM_ACFIFO_0_START_AMCU + SHM_FIFO_0_SIZE) - - -/* == CMT addresses ==*/ -#define SHM_IPC_BASE_CMCU (SHM_IPC_BASE_AMCU+0x08000000) -/* offset pointers */ -#define SHM_ACFIFO_0_WRITE_CMCU SHM_IPC_BASE_CMCU -#define SHM_ACFIFO_0_READ_CMCU (SHM_ACFIFO_0_WRITE_CMCU + SHM_PTR_SIZE) -#define SHM_CAFIFO_0_WRITE_CMCU (SHM_ACFIFO_0_WRITE_CMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_0_READ_CMCU (SHM_CAFIFO_0_WRITE_CMCU + SHM_PTR_SIZE) -/* FIFO*/ -#define SHM_ACFIFO_0_START_CMCU (SHM_CAFIFO_0_WRITE_CMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_0_START_CMCU (SHM_ACFIFO_0_START_CMCU + SHM_FIFO_0_SIZE) - - -/* ADSP addresses*/ -#define SHM_ACFIFO_0_START_ADSP 0x0 -#define SHM_CAFIFO_0_START_ADSP 0x0 -#define SHM_ACFIFO_0_WRITE_ADSP 0x0 -#define SHM_ACFIFO_0_READ_ADSP 0x0 -#define SHM_CAFIFO_0_WRITE_ADSP 0x0 -#define SHM_CAFIFO_0_READ_ADSP 0x0 - -/* FIFO 1 address configuration */ -/* ---------------------------- */ - - -/* FIFO 1 - 4K */ -#define SHM_FIFO_1_SIZE (4*1024) - - -/* == APE addresses == */ -#define SHM_ACFIFO_1_WRITE_AMCU (SHM_CAFIFO_0_START_AMCU + SHM_FIFO_0_SIZE) -#define SHM_ACFIFO_1_READ_AMCU (SHM_ACFIFO_1_WRITE_AMCU + SHM_PTR_SIZE) -#define SHM_CAFIFO_1_WRITE_AMCU (SHM_ACFIFO_1_WRITE_AMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_1_READ_AMCU (SHM_CAFIFO_1_WRITE_AMCU + SHM_PTR_SIZE) -/* FIFO*/ -#define SHM_ACFIFO_1_START_AMCU (SHM_CAFIFO_1_WRITE_AMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_1_START_AMCU (SHM_ACFIFO_1_START_AMCU + SHM_FIFO_1_SIZE) - - -/* == CMT addresses ==*/ -#define SHM_ACFIFO_1_WRITE_CMCU (SHM_CAFIFO_0_START_CMCU + SHM_FIFO_0_SIZE) -#define SHM_ACFIFO_1_READ_CMCU (SHM_ACFIFO_1_WRITE_CMCU + SHM_PTR_SIZE) -#define SHM_CAFIFO_1_WRITE_CMCU (SHM_ACFIFO_1_WRITE_CMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_1_READ_CMCU (SHM_CAFIFO_1_WRITE_CMCU + SHM_PTR_SIZE) -/* FIFO1 start */ -#define SHM_ACFIFO_1_START_CMCU (SHM_CAFIFO_1_WRITE_CMCU + SHM_CACHE_LINE) -#define SHM_CAFIFO_1_START_CMCU (SHM_ACFIFO_1_START_CMCU + SHM_FIFO_1_SIZE) - - -/* ADSP addresses*/ -#define SHM_ACFIFO_1_START_ADSP 0x0 -#define SHM_CAFIFO_1_START_ADSP 0x0 -#define SHM_ACFIFO_1_WRITE_ADSP 0x0 -#define SHM_ACFIFO_1_READ_ADSP 0x0 -#define SHM_CAFIFO_1_WRITE_ADSP 0x0 -#define SHM_CAFIFO_1_READ_ADSP 0x0 - - -#define U8500_SHM_FIFO_APE_COMMON_BASE (SHM_ACFIFO_0_START_AMCU) -#define U8500_SHM_FIFO_CMT_COMMON_BASE (SHM_CAFIFO_0_START_AMCU) -#define U8500_SHM_FIFO_APE_AUDIO_BASE (SHM_ACFIFO_1_START_AMCU) -#define U8500_SHM_FIFO_CMT_AUDIO_BASE (SHM_CAFIFO_1_START_AMCU) - -#endif /* __SHRM_CONFIG_H */ diff --git a/arch/arm/mach-ux500/include/mach/shrm_driver.h b/arch/arm/mach-ux500/include/mach/shrm_driver.h deleted file mode 100644 index 71b3fbcf229..00000000000 --- a/arch/arm/mach-ux500/include/mach/shrm_driver.h +++ /dev/null @@ -1,204 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghavi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#ifndef __SHRM_DRIVER_H__ -#define __SHRM_DRIVER_H__ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -#include - -#define ISA_DEVICES 6 - -#define BOOT_INIT (0) -#define BOOT_INFO_SYNC (1) -#define BOOT_DONE (2) -#define BOOT_UNKNOWN (3) - -/** - * struct shrm_dev - shrm device information - * @ca_wake_irq: CMT wake interrupt number - * @ac_read_notif_0_irq: ape-cmt common channel read notify interrupt - * @ac_read_notif_1_irq: ape-cmt audio channel read notify interrupt - * @ca_msg_pending_notif_0_irq: cmt-ape common channel msg pending interrupt - * @ca_msg_pending_notif_1_irq: cmt-ape audio channel msg pending interrupt - * @intr_base: interrupt base register address - * @ape_common_fifo_base: ape side common channel fifo base addr - * @ape_audio_fifo_base: ape side audio channel fifo base addr - * @cmt_common_fifo_base: cmt side common channel fifo base addr - * @cmt_audio_fifo_base: cmt side audio channel fifo base addr - * @ape_common_fifo_base_phy: physical addr of ape common fifo - * @ape_audio_fifo_base_phy: physical addr of ape audio fifo - * @cmt_common_fifo_base_phy: physical addr of cmt common fifo - * @cmt_audio_fifo_base_phy: physical addr of cmt audio fifo - * @ape_common_fifo_size: ape side common channel fifo size - * @ape_audio_fifo_size: ape side audio channel fifo size - * @cmt_common_fifo_size: cmt side common channel fifo size - * @cmt_audio_fifo_size: cmt side audio channel fifo size - * @netdev_flag_up: flag to indicate up/down of netwok device - * @msr_flag: flag to check on-going MSR sequence - * @ac_common_shared_wptr: ape-cmt common channel write pointer - * @ac_common_shared_rptr: ape-cmt common channel read pointer - * @ca_common_shared_wptr: cmt-ape common channel write pointer - * @ca_common_shared_rptr: cmt-ape common channel read pointer - * @ac_audio_shared_wptr: ape-cmt audio channel write pointer - * @ac_audio_shared_rptr: ape-cmt audio channel read pointer - * @ca_audio_shared_wptr: cmt-ape audio channel write pointer - * @ca_audio_shared_rptr: cmt-ape audio channel read pointer - * @dev: pointer to the driver device - * @ndev: pointer to the network device structure - * @isa_context: pointer to t_isa_driver_sontext dtructure - * @shm_common_ch_wr_wq: work queue for writing to common channel - * @shm_audio_ch_wr_wq: workqueue for writing to audio channel - * @shm_ac_wake_wq: workqueue for receiving ape-cmt wake requests - * @shm_ca_wake_wq: workqueue for receiving cmt-ape wake requests - * @shm_ac_sleep_wq: workqueue for recieving ape-cmt sleep requests - * @send_ac_msg_pend_notify_0: work for handling pending message on common - * channel - * @send_ac_msg_pend_notify_1: work for handling pending message on audio - * channel - * @shm_ac_wake_req: work to send ape-cmt wake request - * @shm_ca_wake_req: work to send cmt-ape wake request - * @shm_ca_sleep_req: work to send cmt-ape sleep request - * @shm_ac_sleep_req: work to send ape-cmt sleep request - */ -struct shrm_dev { - u8 ca_wake_irq; - u8 ac_read_notif_0_irq; - u8 ac_read_notif_1_irq; - u8 ca_msg_pending_notif_0_irq; - u8 ca_msg_pending_notif_1_irq; - void __iomem *intr_base; - void __iomem *ape_common_fifo_base; - void __iomem *ape_audio_fifo_base; - void __iomem *cmt_common_fifo_base; - void __iomem *cmt_audio_fifo_base; - - u32 *ape_common_fifo_base_phy; - u32 *ape_audio_fifo_base_phy; - u32 *cmt_common_fifo_base_phy; - u32 *cmt_audio_fifo_base_phy; - - int ape_common_fifo_size; - int ape_audio_fifo_size; - int cmt_common_fifo_size; - int cmt_audio_fifo_size; - int netdev_flag_up; - int msr_flag; - - void __iomem *ac_common_shared_wptr; - void __iomem *ac_common_shared_rptr; - void __iomem *ca_common_shared_wptr; - void __iomem *ca_common_shared_rptr; - - void __iomem *ac_audio_shared_wptr; - void __iomem *ac_audio_shared_rptr; - void __iomem *ca_audio_shared_wptr; - void __iomem *ca_audio_shared_rptr; - - struct device *dev; - struct net_device *ndev; - struct modem *modem; - struct isa_driver_context *isa_context; - struct workqueue_struct *shm_common_ch_wr_wq; - struct workqueue_struct *shm_audio_ch_wr_wq; - struct workqueue_struct *shm_ac_wake_wq; - struct workqueue_struct *shm_ca_wake_wq; - struct workqueue_struct *shm_ac_sleep_wq; - struct work_struct send_ac_msg_pend_notify_0; - struct work_struct send_ac_msg_pend_notify_1; - struct work_struct shm_ac_wake_req; - struct work_struct shm_ca_wake_req; - struct work_struct shm_ca_sleep_req; - struct work_struct shm_ac_sleep_req; -}; - -/** - * struct queue_element - information to add an element to queue - * @entry: list entry - * @offset: message offset - * @size: message size - * @no: total number of messages - */ -struct queue_element { - struct list_head entry; - u32 offset; - u32 size; - u32 no; -}; - -/** - * struct message_queue - ISI, RPC, AUDIO, SECURITY message queue information - * @fifo_base: pointer to the respective fifo base - * @size: size of the data to be read - * @readptr: fifo read pointer - * @writeptr: fifo write pointer - * @no: total number of messages - * @update_lock: spinlock for protecting the queue read operation - * @q_rp: queue write pointer - * @wq_readable: wait queue head - * @msg_list: message list - * @shrm: pointer to shrm device information structure - */ -struct message_queue { - u8 *fifo_base; - u32 size; - u32 readptr; - u32 writeptr; - u32 no; - spinlock_t update_lock; - atomic_t q_rp; - wait_queue_head_t wq_readable; - struct list_head msg_list; - struct shrm_dev *shrm; -}; - -/** - * struct isadev_context - shrm char interface context - * @dl_queue: structre to store the queue related info - * @device_id: message id(ISI, RPC, AUDIO, SECURITY) - * @addr: device addresses. - */ -struct isadev_context { - struct message_queue dl_queue; - u8 device_id; - void *addr; -}; - -/** - * struct isa_driver_context - shrm char interface device information - * @is_open: flag to check the usage of queue - * @isadev: pointer to struct t_isadev_context - * @common_tx: spinlock for protecting common channel - * @tx_audio_mutex: mutex for protecting audio channel - * @cdev: character device structre - * @shm_class: pointer to the class structure - */ -struct isa_driver_context { - atomic_t is_open[ISA_DEVICES]; - struct isadev_context *isadev; - spinlock_t common_tx; - struct mutex tx_audio_mutex; - struct cdev cdev; - struct class *shm_class; -}; - -#endif diff --git a/arch/arm/mach-ux500/include/mach/shrm_net.h b/arch/arm/mach-ux500/include/mach/shrm_net.h deleted file mode 100644 index a97b276ee15..00000000000 --- a/arch/arm/mach-ux500/include/mach/shrm_net.h +++ /dev/null @@ -1,44 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2009 - * - * Author: Kumar Sanghvi for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#ifndef __SHRM_NET_H -#define __SHRM_NET_H - -#define SHRM_HLEN 1 -#define PHONET_ALEN 1 - -#define PN_PIPE 0xD9 -#define PN_DEV_HOST 0x00 -#define PN_LINK_ADDR 0x26 -#define PN_TX_QUEUE_LEN 3 - -#define RESOURCE_ID_INDEX 3 -#define SRC_OBJ_INDEX 7 -#define MSG_ID_INDEX 9 -#define PIPE_HDL_INDEX 10 -#define NETLINK_SHRM 20 - -/** - * struct shrm_net_iface_priv - shrm net interface device information - * @shrm_device: pointer to the shrm device information structure - * @iface_num: flag used to indicate the up/down of netdev - */ -struct shrm_net_iface_priv { - struct shrm_dev *shrm_device; - unsigned int iface_num; -}; - -int shrm_register_netdev(struct shrm_dev *shrm_dev_data); -int shrm_net_receive(struct net_device *dev); -int shrm_suspend_netdev(struct net_device *dev); -int shrm_resume_netdev(struct net_device *dev); -int shrm_stop_netdev(struct net_device *dev); -int shrm_restart_netdev(struct net_device *dev); -int shrm_start_netdev(struct net_device *dev); -void shrm_unregister_netdev(struct shrm_dev *shrm_dev_data); - -#endif /* __SHRM_NET_H */ diff --git a/arch/arm/mach-ux500/include/mach/shrm_private.h b/arch/arm/mach-ux500/include/mach/shrm_private.h deleted file mode 100644 index 1f09e7bef94..00000000000 --- a/arch/arm/mach-ux500/include/mach/shrm_private.h +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghavi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#ifndef __SHRM_PRIVATE_INCLUDED -#define __SHRM_PRIVATE_INCLUDED - -#include -#include -#include -#include - -#define GOP_OUTPUT_REGISTER_BASE (0x0) -#define GOP_SET_REGISTER_BASE (0x4) -#define GOP_CLEAR_REGISTER_BASE (0x8) -#define GOP_TOGGLE_REGISTER_BASE (0xc) - - -#define GOP_AUDIO_AC_READ_NOTIFICATION_BIT (0) -#define GOP_AUDIO_CA_MSG_PENDING_NOTIFICATION_BIT (1) -#define GOP_COMMON_AC_READ_NOTIFICATION_BIT (2) -#define GOP_COMMON_CA_MSG_PENDING_NOTIFICATION_BIT (3) -#define GOP_CA_WAKE_REQ_BIT (7) -#define GOP_AUDIO_CA_READ_NOTIFICATION_BIT (23) -#define GOP_AUDIO_AC_MSG_PENDING_NOTIFICATION_BIT (24) -#define GOP_COMMON_CA_READ_NOTIFICATION_BIT (25) -#define GOP_COMMON_AC_MSG_PENDING_NOTIFICATION_BIT (26) -#define GOP_CA_WAKE_ACK_BIT (27) - -#define L2_MSG_MAPID_OFFSET (24) -#define L1_MSG_MAPID_OFFSET (28) - -#define SHRM_SLEEP_STATE (0) -#define SHRM_PTR_FREE (1) -#define SHRM_PTR_BUSY (2) -#define SHRM_IDLE (3) - -#define ISI_MESSAGING (0) -#define RPC_MESSAGING (1) -#define AUDIO_MESSAGING (2) -#define SECURITY_MESSAGING (3) -#define COMMON_LOOPBACK_MESSAGING (0xC0) -#define AUDIO_LOOPBACK_MESSAGING (0x80) - -#define COMMON_CHANNEL 0 -#define AUDIO_CHANNEL 1 - -typedef void (*MSG_PENDING_NOTIF)(const u32 Wptr); - -/** - * struct fifo_write_params - parameters used for FIFO write operation. - * @writer_local_rptr: pointer to local read buffer - * @writer_local_wptr: pointer to local write buffer - * @shared_wptr: write pointer shared by cmt and ape - * @shared_rptr: read pointer shared by cmt and ape - * @availablesize: available memory in fifo - * @end_addr_fifo: fifo end addr - * @fifo_virtual_addr: fifo virtual addr - * @fifo_update_lock: spin lock to update fifo. - * - * On writting a message to FIFO the same has to be read by the modem before - * writing the next message to the FIFO. In oder to over come this a local - * write and read pointer is used for internal purpose. - */ -struct fifo_write_params { - u32 writer_local_rptr; - u32 writer_local_wptr; - u32 shared_wptr; - u32 shared_rptr; - u32 availablesize; - u32 end_addr_fifo; - u32 *fifo_virtual_addr; - spinlock_t fifo_update_lock; -} ; - -/** - * struct fifo_read_params - parameters used for FIFO read operation - * @reader_local_rptr: pointer to local read buffer - * @reader_local_wptr: pointer to local write buffer - * @shared_wptr: write pointer shared by cmt and ape - * @shared_rptr: read pointer shared by cmt and ape - * @availablesize: available memory in fifo - * @end_addr_fifo: fifo end add - * @fifo_virtual_addr: fifo virtual addr - */ -struct fifo_read_params{ - u32 reader_local_rptr; - u32 reader_local_wptr; - u32 shared_wptr; - u32 shared_rptr; - u32 availablesize; - u32 end_addr_fifo; - u32 *fifo_virtual_addr; - -} ; - -int shrm_protocol_init(struct shrm_dev *shrm, - received_msg_handler common_rx_handler, - received_msg_handler audio_rx_handler); -void shrm_protocol_deinit(struct shrm_dev *shrm); -void shm_fifo_init(struct shrm_dev *shrm); -int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, - u8 l2header, void *addr, u32 length); -int shm_write_msg(struct shrm_dev *shrm, - u8 l2_header, void *addr, u32 length); - -u8 is_the_only_one_unread_message(struct shrm_dev *shrm, - u8 channel, u32 length); -u8 read_remaining_messages_common(void); -u8 read_remaining_messages_audio(void); -u8 read_one_l2msg_audio(struct shrm_dev *shrm, - u8 *p_l2_msg, u32 *p_len); -u8 read_one_l2msg_common(struct shrm_dev *shrm, - u8 *p_l2_msg, u32 *p_len); -void receive_messages_common(struct shrm_dev *shrm); -void receive_messages_audio(struct shrm_dev *shrm); - -void update_ac_common_local_rptr(struct shrm_dev *shrm); -void update_ac_audio_local_rptr(struct shrm_dev *shrm); -void update_ca_common_local_wptr(struct shrm_dev *shrm); -void update_ca_audio_local_wptr(struct shrm_dev *shrm); -void update_ac_common_shared_wptr(struct shrm_dev *shrm); -void update_ac_audio_shared_wptr(struct shrm_dev *shrm); -void update_ca_common_shared_rptr(struct shrm_dev *shrm); -void update_ca_audio_shared_rptr(struct shrm_dev *shrm); - - -void get_writer_pointers(u8 msg_type, u32 *WriterLocalRptr, \ - u32 *WriterLocalWptr, u32 *SharedWptr); -void get_reader_pointers(u8 msg_type, u32 *ReaderLocalRptr, \ - u32 *ReaderLocalWptr, u32 *SharedRptr); -u8 read_boot_info_req(struct shrm_dev *shrm, - u32 *pConfig, - u32 *pVersion); -void write_boot_info_resp(struct shrm_dev *shrm, u32 Config, - u32 Version); - -void send_ac_msg_pending_notification_0(struct shrm_dev *shrm); -void send_ac_msg_pending_notification_1(struct shrm_dev *shrm); -void ca_msg_read_notification_0(struct shrm_dev *shrm); -void ca_msg_read_notification_1(struct shrm_dev *shrm); - -void set_ca_msg_0_read_notif_send(u8 val); -u8 get_ca_msg_0_read_notif_send(void); -void set_ca_msg_1_read_notif_send(u8 val); -u8 get_ca_msg_1_read_notif_send(void); - -irqreturn_t ca_wake_irq_handler(int irq, void *ctrlr); -irqreturn_t ac_read_notif_0_irq_handler(int irq, void *ctrlr); -irqreturn_t ac_read_notif_1_irq_handler(int irq, void *ctrlr); -irqreturn_t ca_msg_pending_notif_0_irq_handler(int irq, void *ctrlr); -irqreturn_t ca_msg_pending_notif_1_irq_handler(int irq, void *ctrlr); - -void shm_ca_msgpending_0_tasklet(unsigned long); -void shm_ca_msgpending_1_tasklet(unsigned long); -void shm_ac_read_notif_0_tasklet(unsigned long); -void shm_ac_read_notif_1_tasklet(unsigned long); -void shm_ca_wake_req_tasklet(unsigned long); - -u8 get_boot_state(void); - -int get_ca_wake_req_state(void); - -/* shrm character interface */ -int isa_init(struct shrm_dev *shrm); -void isa_exit(struct shrm_dev *shrm); -int add_msg_to_queue(struct message_queue *q, u32 size); -ssize_t isa_read(struct file *filp, char __user *buf, size_t len, - loff_t *ppos); -int get_size_of_new_msg(struct message_queue *q); -int remove_msg_from_queue(struct message_queue *q); -void shrm_char_reset_queues(struct shrm_dev *shrm); -int shrm_get_cdev_index(u8 l2_header); -int shrm_get_cdev_l2header(u8 idx); - -#endif diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c index 6375d7f1ea3..31f1fedd704 100644 --- a/drivers/char/shrm_char.c +++ b/drivers/char/shrm_char.c @@ -15,13 +15,13 @@ #include #include #include +#include +#include +#include +#include #include #include -#include -#include -#include -#include #define NAME "IPC_ISA" diff --git a/drivers/misc/shrm/Kconfig b/drivers/misc/shrm/Kconfig deleted file mode 100644 index 6bafdeec5b9..00000000000 --- a/drivers/misc/shrm/Kconfig +++ /dev/null @@ -1,43 +0,0 @@ -# -# SHM HW kernel configuration -# -config U8500_SHRM - tristate "U8500 SHRM hardware driver" - depends on ARCH_U8500 && PHONET - default Y - ---help--- - If you say Y here, you will enable the STN8500 SHM hardware driver. - - If unsure, say N. -choice - prompt "Modem Image Version" - depends on U8500_SHRM - default SHRM_V1_UPDATES_VERSION - - config SHRM_V1_UPDATES_VERSION - depends on U8500_SHRM - bool "SHRM V1 UPDATES" - help - Modem Images with V1 Updates - -endchoice - -config U8500_SHRM_LOOP_BACK - tristate "U8500 SHRM loopback" - depends on U8500_SHRM - default n - ---help--- - If you say Y here, you will enable the shm loopback - - If unsure, say N. - -config U8500_SHRM_MODEM_SILENT_RESET - bool "U8500 SHRM Modem Silent Reset" - depends on U8500_SHRM - default n - ---help--- - If you say Y here, you will enable the modem silent reset feature - - If unsure, say N. - - diff --git a/drivers/misc/shrm/Makefile b/drivers/misc/shrm/Makefile deleted file mode 100644 index 8115c24920b..00000000000 --- a/drivers/misc/shrm/Makefile +++ /dev/null @@ -1,11 +0,0 @@ -# -# Makefile for SHRM drivers -# - -ifdef CONFIG_PHONET -u8500_shrm-objs := modem_shrm_driver.o shrm_fifo.o shrm_protocol.o -else -u8500_shrm-objs := shrm_driver.o shrm_fifo.o shrm_protocol.o -endif - -obj-$(CONFIG_U8500_SHRM) += u8500_shrm.o diff --git a/drivers/misc/shrm/modem_shrm_driver.c b/drivers/misc/shrm/modem_shrm_driver.c deleted file mode 100644 index a3c8d4bda1b..00000000000 --- a/drivers/misc/shrm/modem_shrm_driver.c +++ /dev/null @@ -1,671 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghvi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -#include -#ifdef CONFIG_HIGH_RES_TIMERS -#include -static struct hrtimer timer; -#endif -#include -#include -#include - -/* debug functionality */ -#define ISA_DEBUG 0 - -#define PHONET_TASKLET -#define MAX_RCV_LEN 2048 - -void do_phonet_rcv_tasklet(unsigned long unused); -struct tasklet_struct phonet_rcv_tasklet; - -/** - * audio_receive() - Receive audio channel completion callback - * @shrm: pointer to shrm device information structure - * @data: message pointer - * @n_bytes: message size - * @l2_header: L2 header/device ID 2->audio, 5->audio_loopback - * - * This fucntion is called from the audio receive handler. Copies the audio - * message from the FIFO to the AUDIO queue. The message is later copied from - * this queue to the user buffer through the char or net interface read - * operation. - */ -static int audio_receive(struct shrm_dev *shrm, void *data, - u32 n_bytes, u8 l2_header) -{ - u32 size = 0; - int ret = 0; - int idx; - u8 *psrc; - struct message_queue *q; - struct isadev_context *audiodev; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - idx = shrm_get_cdev_index(l2_header); - if (idx < 0) { - dev_err(shrm->dev, "failed to get index\n"); - return idx; - } - audiodev = &shrm->isa_context->isadev[idx]; - q = &audiodev->dl_queue; - spin_lock(&q->update_lock); - /* Memcopy RX data first */ - if ((q->writeptr+n_bytes) >= q->size) { - psrc = (u8 *)data; - size = (q->size-q->writeptr); - /* Copy First Part of msg */ - memcpy((q->fifo_base+q->writeptr), psrc, size); - psrc += size; - /* Copy Second Part of msg at the top of fifo */ - memcpy(q->fifo_base, psrc, (n_bytes-size)); - } else { - memcpy((q->fifo_base+q->writeptr), data, n_bytes); - } - ret = add_msg_to_queue(q, n_bytes); - spin_unlock(&q->update_lock); - if (ret < 0) - dev_err(shrm->dev, "Adding a msg to message queue failed"); - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return ret; -} - -/** - * common_receive() - Receive common channel completion callback - * @shrm: pointer to the shrm device information structure - * @data: message pointer - * @n_bytes: message size - * @l2_header: L2 header / device ID - * - * This function is called from the receive handler to copy the respective - * ISI, RPC, SECURITY message to its respective queue. The message is then - * copied from queue to the user buffer on char net interface read operation. - */ -static int common_receive(struct shrm_dev *shrm, void *data, - u32 n_bytes, u8 l2_header) -{ - u32 size = 0; - int ret = 0; - int idx; - u8 *psrc; - struct message_queue *q; - struct isadev_context *isa_dev; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - idx = shrm_get_cdev_index(l2_header); - if (idx < 0) { - dev_err(shrm->dev, "failed to get index\n"); - return idx; - } - isa_dev = &shrm->isa_context->isadev[idx]; - q = &isa_dev->dl_queue; - spin_lock(&q->update_lock); - /* Memcopy RX data first */ - if ((q->writeptr+n_bytes) >= q->size) { - dev_dbg(shrm->dev, "Inside Loop Back\n"); - psrc = (u8 *)data; - size = (q->size-q->writeptr); - /* Copy First Part of msg */ - memcpy((q->fifo_base+q->writeptr), psrc, size); - psrc += size; - /* Copy Second Part of msg at the top of fifo */ - memcpy(q->fifo_base, psrc, (n_bytes-size)); - } else { - memcpy((q->fifo_base+q->writeptr), data, n_bytes); - } - ret = add_msg_to_queue(q, n_bytes); - spin_unlock(&q->update_lock); - if (ret < 0) { - dev_err(shrm->dev, "Adding a msg to message queue failed"); - return ret; - } - - - if (l2_header == ISI_MESSAGING) { - if (shrm->netdev_flag_up) { - dev_dbg(shrm->dev, - "scheduling the phonet tasklet from %s!\n", - __func__); - tasklet_schedule(&phonet_rcv_tasklet); - } - dev_dbg(shrm->dev, - "Out of phonet tasklet %s!!!\n", __func__); - } - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return ret; -} - -/** - * rx_common_l2msg_handler() - common channel receive handler - * @l2_header: L2 header - * @msg: pointer to the receive buffer - * @length: length of the msg to read - * @shrm: pointer to shrm device information structure - * - * This function is called to receive the message from CaMsgPendingNotification - * interrupt handler. - */ -static void rx_common_l2msg_handler(u8 l2_header, - void *msg, u32 length, - struct shrm_dev *shrm) -{ - int ret = 0; - dev_dbg(shrm->dev, "%s IN\n", __func__); - - ret = common_receive(shrm, msg, length, l2_header); - if (ret < 0) - dev_err(shrm->dev, - "common receive with l2 header %d failed\n", l2_header); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -/** - * rx_audio_l2msg_handler() - audio channel receive handler - * @l2_header: L2 header - * @msg: pointer to the receive buffer - * @length: length of the msg to read - * @shrm: pointer to shrm device information structure - * - * This function is called to receive the message from CaMsgPendingNotification - * interrupt handler. - */ -static void rx_audio_l2msg_handler(u8 l2_header, - void *msg, u32 length, - struct shrm_dev *shrm) -{ - int ret = 0; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - ret = audio_receive(shrm, msg, length, l2_header); - if (ret < 0) - dev_err(shrm->dev, "audio receive failed\n"); - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -static int __init shm_initialise_irq(struct shrm_dev *shrm) -{ - int err = 0; - - err = shrm_protocol_init(shrm, - rx_common_l2msg_handler, rx_audio_l2msg_handler); - if (err < 0) { - dev_err(shrm->dev, "SHM Protocol Init Failure\n"); - return err; - } - - err = request_irq(shrm->ca_wake_irq, - ca_wake_irq_handler, IRQF_TRIGGER_RISING, - "ca_wake-up", shrm); - if (err < 0) { - dev_err(shrm->dev, - "Unable to allocate shm tx interrupt line\n"); - free_irq(shrm->ca_wake_irq, shrm); - return err; - } - - err = request_irq(shrm->ac_read_notif_0_irq, - ac_read_notif_0_irq_handler, 0, - "ac_read_notif_0", shrm); - - if (err < 0) { - dev_err(shrm->dev, - "error ac_read_notif_0_irq interrupt line\n"); - goto irq_err1; - } - - err = request_irq(shrm->ac_read_notif_1_irq, - ac_read_notif_1_irq_handler, 0, - "ac_read_notif_1", shrm); - - if (err < 0) { - dev_err(shrm->dev, - "error ac_read_notif_1_irq interrupt line\n"); - goto irq_err2; - } - - err = request_irq(shrm->ca_msg_pending_notif_0_irq, - ca_msg_pending_notif_0_irq_handler, 0, - "ca_msg_pending_notif_0", shrm); - - if (err < 0) { - dev_err(shrm->dev, - "error ca_msg_pending_notif_0_irq line\n"); - goto irq_err3; - } - - err = request_irq(shrm->ca_msg_pending_notif_1_irq, - ca_msg_pending_notif_1_irq_handler, 0, - "ca_msg_pending_notif_1", shrm); - - if (err < 0) { - dev_err(shrm->dev, - "error ca_msg_pending_notif_1_irq interrupt line\n"); - goto irq_err4; - } - return err; -irq_err4: - free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); -irq_err3: - free_irq(shrm->ac_read_notif_1_irq, shrm); -irq_err2: - free_irq(shrm->ac_read_notif_0_irq, shrm); -irq_err1: - free_irq(shrm->ca_wake_irq, shrm); - return err; -} - -static void free_shm_irq(struct shrm_dev *shrm) -{ - free_irq(shrm->ca_wake_irq, shrm); - free_irq(shrm->ac_read_notif_0_irq, shrm); - free_irq(shrm->ac_read_notif_1_irq, shrm); - free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); - free_irq(shrm->ca_msg_pending_notif_1_irq, shrm); -} - - - -#ifdef CONFIG_HIGH_RES_TIMERS -static enum hrtimer_restart callback(struct hrtimer *timer) -{ - return HRTIMER_NORESTART; -} -#endif - -void do_phonet_rcv_tasklet(unsigned long unused) -{ - ssize_t ret; - struct shrm_dev *shrm = (struct shrm_dev *)unused; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - for (;;) { - ret = shrm_net_receive(shrm->ndev); - if (ret == 0) { - dev_dbg(shrm->dev, "len is zero, queue empty\n"); - break; - } - if (ret < 0) { - dev_err(shrm->dev, "len < 0 !!! error!!!\n"); - break; - } - } - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -static int shrm_probe(struct platform_device *pdev) -{ - int err = 0; - struct resource *res; - struct shrm_dev *shrm = NULL; - - shrm = kzalloc(sizeof(struct shrm_dev), GFP_KERNEL); - if (shrm == NULL) { - dev_err(&pdev->dev, - "Could not allocate memory for struct shm_dev\n"); - return -ENOMEM; - } - - shrm->dev = &pdev->dev; - shrm->modem = modem_get(shrm->dev, "u8500-shrm-modem"); - if (shrm->modem == NULL) { - dev_err(shrm->dev, " Could not retrieve the modem.\n"); - return -ENODEV; - } - - /* initialise the SHM */ - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res) { - dev_err(shrm->dev, - "Unable to map Ca Wake up interrupt\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ca_wake_irq = res->start; - res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); - - if (!res) { - dev_err(shrm->dev, - "Unable to map APE_Read_notif_common IRQ base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ac_read_notif_0_irq = res->start; - res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); - - if (!res) { - dev_err(shrm->dev, - "Unable to map APE_Read_notif_audio IRQ base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ac_read_notif_1_irq = res->start; - res = platform_get_resource(pdev, IORESOURCE_IRQ, 3); - - if (!res) { - dev_err(shrm->dev, - "Unable to map Cmt_msg_pending_notif_common IRQbase\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ca_msg_pending_notif_0_irq = res->start; - res = platform_get_resource(pdev, IORESOURCE_IRQ, 4); - - if (!res) { - dev_err(shrm->dev, - "Unable to map Cmt_msg_pending_notif_audio IRQ base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ca_msg_pending_notif_1_irq = res->start; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - if (!res) { - dev_err(shrm->dev, - "Could not get SHM IO memory information\n"); - err = -ENODEV; - goto rollback_intr; - } - shrm->intr_base = (void __iomem *)ioremap_nocache(res->start, - res->end - res->start + 1); - if (!(shrm->intr_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ape_common_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_APE_COMMON_BASE; - shrm->ape_common_fifo_base = - (void __iomem *)ioremap_nocache( - U8500_SHM_FIFO_APE_COMMON_BASE, - SHM_FIFO_0_SIZE); - shrm->ape_common_fifo_size = (SHM_FIFO_0_SIZE)/4; - - if (!(shrm->ape_common_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_ape_common_fifo_base; - } - shrm->cmt_common_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_CMT_COMMON_BASE; - shrm->cmt_common_fifo_base = - (void __iomem *)ioremap_nocache( - U8500_SHM_FIFO_CMT_COMMON_BASE, SHM_FIFO_0_SIZE); - shrm->cmt_common_fifo_size = (SHM_FIFO_0_SIZE)/4; - - if (!(shrm->cmt_common_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_cmt_common_fifo_base; - } - shrm->ape_audio_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_APE_AUDIO_BASE; - shrm->ape_audio_fifo_base = - (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_APE_AUDIO_BASE, - SHM_FIFO_1_SIZE); - shrm->ape_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; - - if (!(shrm->ape_audio_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_ape_audio_fifo_base; - } - shrm->cmt_audio_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_CMT_AUDIO_BASE; - shrm->cmt_audio_fifo_base = - (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_CMT_AUDIO_BASE, - SHM_FIFO_1_SIZE); - shrm->cmt_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; - - if (!(shrm->cmt_audio_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_cmt_audio_fifo_base; - } - shrm->ac_common_shared_wptr = - (void __iomem *)ioremap(SHM_ACFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_common_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_ac_common_shared_wptr; - } - shrm->ac_common_shared_rptr = - (void __iomem *)ioremap(SHM_ACFIFO_0_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_common_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - shrm->ca_common_shared_wptr = - (void __iomem *)ioremap(SHM_CAFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_common_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - shrm->ca_common_shared_rptr = - (void __iomem *)ioremap(SHM_CAFIFO_0_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_common_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - shrm->ac_audio_shared_wptr = - (void __iomem *)ioremap(SHM_ACFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_audio_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - shrm->ac_audio_shared_rptr = - (void __iomem *)ioremap(SHM_ACFIFO_1_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_audio_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - shrm->ca_audio_shared_wptr = - (void __iomem *)ioremap(SHM_CAFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_audio_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - shrm->ca_audio_shared_rptr = - (void __iomem *)ioremap(SHM_CAFIFO_1_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_audio_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - if (isa_init(shrm) != 0) { - dev_err(shrm->dev, "Driver Initialization Error\n"); - err = -EBUSY; - } - /* install handlers and tasklets */ - if (shm_initialise_irq(shrm)) { - dev_err(shrm->dev, - "shm error in interrupt registration\n"); - goto rollback_irq; - } -#ifdef CONFIG_HIGH_RES_TIMERS - hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - timer.function = callback; - hrtimer_start(&timer, ktime_set(0, 2*NSEC_PER_MSEC), HRTIMER_MODE_REL); -#endif - err = shrm_register_netdev(shrm); - if (err < 0) - goto rollback_irq; - - tasklet_init(&phonet_rcv_tasklet, do_phonet_rcv_tasklet, 0); - phonet_rcv_tasklet.data = (unsigned long)shrm; - - platform_set_drvdata(pdev, shrm); - - return err; -rollback_irq: - free_shm_irq(shrm); -rollback_map: - iounmap(shrm->ac_common_shared_wptr); - iounmap(shrm->ac_common_shared_rptr); - iounmap(shrm->ca_common_shared_wptr); - iounmap(shrm->ca_common_shared_rptr); - iounmap(shrm->ac_audio_shared_wptr); - iounmap(shrm->ac_audio_shared_rptr); - iounmap(shrm->ca_audio_shared_wptr); - iounmap(shrm->ca_audio_shared_rptr); -rollback_ac_common_shared_wptr: - iounmap(shrm->cmt_audio_fifo_base); -rollback_cmt_audio_fifo_base: - iounmap(shrm->ape_audio_fifo_base); -rollback_ape_audio_fifo_base: - iounmap(shrm->cmt_common_fifo_base); -rollback_cmt_common_fifo_base: - iounmap(shrm->ape_common_fifo_base); -rollback_ape_common_fifo_base: - iounmap(shrm->intr_base); -rollback_intr: - kfree(shrm); - return err; -} - -static int __exit shrm_remove(struct platform_device *pdev) -{ - struct shrm_dev *shrm = platform_get_drvdata(pdev); - - free_shm_irq(shrm); - iounmap(shrm->intr_base); - iounmap(shrm->ape_common_fifo_base); - iounmap(shrm->cmt_common_fifo_base); - iounmap(shrm->ape_audio_fifo_base); - iounmap(shrm->cmt_audio_fifo_base); - iounmap(shrm->ac_common_shared_wptr); - iounmap(shrm->ac_common_shared_rptr); - iounmap(shrm->ca_common_shared_wptr); - iounmap(shrm->ca_common_shared_rptr); - iounmap(shrm->ac_audio_shared_wptr); - iounmap(shrm->ac_audio_shared_rptr); - iounmap(shrm->ca_audio_shared_wptr); - iounmap(shrm->ca_audio_shared_rptr); - shrm_unregister_netdev(shrm); - isa_exit(shrm); - kfree(shrm); - - return 0; -} - -#ifdef CONFIG_PM -/** - * u8500_shrm_suspend() - This routine puts the SHRM in to sustend state. - * @dev: pointer to device structure. - * - * This routine checks the current ongoing communication with Modem by - * examining the ca_wake state and prevents suspend if modem communication - * is on-going. - * If ca_wake = 1 (high), modem comm. is on-going; don't suspend - * If ca_wake = 0 (low), no comm. with modem on-going.Allow suspend - */ -int u8500_shrm_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct shrm_dev *shrm = platform_get_drvdata(pdev); - int err; - - dev_dbg(&pdev->dev, "%s called...\n", __func__); - dev_dbg(&pdev->dev, "ca_wake_req_state = %x\n", - get_ca_wake_req_state()); - - /* if ca_wake_req is high, prevent system suspend */ - if (!get_ca_wake_req_state()) { - err = shrm_suspend_netdev(shrm->ndev); - return err; - } else - return -EBUSY; -} - -/** - * u8500_shrm_resume() - This routine resumes the SHRM from suspend state. - * @dev: pointer to device structure - * - * This routine restore back the current state of the SHRM - */ -int u8500_shrm_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct shrm_dev *shrm = platform_get_drvdata(pdev); - int err; - - dev_dbg(&pdev->dev, "%s called...\n", __func__); - err = shrm_resume_netdev(shrm->ndev); - - return err; -} - -static const struct dev_pm_ops shrm_dev_pm_ops = { - .suspend_noirq = u8500_shrm_suspend, - .resume_noirq = u8500_shrm_resume, -}; -#endif - -static struct platform_driver shrm_driver = { - .remove = __exit_p(shrm_remove), - .driver = { - .name = "u8500_shrm", - .owner = THIS_MODULE, -#ifdef CONFIG_PM - .pm = &shrm_dev_pm_ops, -#endif - }, -}; - -static int __init shrm_driver_init(void) -{ - return platform_driver_probe(&shrm_driver, shrm_probe); -} - -static void __exit shrm_driver_exit(void) -{ - platform_driver_unregister(&shrm_driver); -} - -module_init(shrm_driver_init); -module_exit(shrm_driver_exit); - -MODULE_AUTHOR("Biju Das, Kumar Sanghvi, Arun Murthy"); -MODULE_DESCRIPTION("Shared Memory Modem Driver Interface"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/shrm/shrm_driver.c b/drivers/misc/shrm/shrm_driver.c deleted file mode 100644 index 6277794608a..00000000000 --- a/drivers/misc/shrm/shrm_driver.c +++ /dev/null @@ -1,1439 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghvi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#define DEBUG - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include - - -#ifdef CONFIG_HIGH_RES_TIMERS -#include -static struct hrtimer timer; -#endif - - -#define NAME "IPC_ISA" -#define ISA_DEVICES 4 -/**debug functionality*/ -#define ISA_DEBUG 0 - -#define ISI_MESSAGING (0) -#define RPC_MESSAGING (1) -#define AUDIO_MESSAGING (2) -#define SECURITY_MESSAGING (3) - -#define SIZE_OF_FIFO (512*1024) - -static u8 message_fifo[4][SIZE_OF_FIFO]; - -static u8 wr_isi_msg[10*1024]; -static u8 wr_rpc_msg[10*1024]; -static u8 wr_sec_msg[10*1024]; -static u8 wr_audio_msg[10*1024]; - -/* global data */ -/* - * int major:This variable is exported to user as module_param to specify - * major number at load time - */ -static int major; -module_param(major, int, 0); -MODULE_PARM_DESC(major, "Major device number"); -/* global fops mutex */ -static DEFINE_MUTEX(isa_lock); -rx_cb common_rx; -rx_cb audio_rx; - - -static int isi_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); -static int rpc_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); -static int audio_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); -static int security_receive(struct shrm_dev *shrm, - void *data, u32 n_bytes); - -static void rx_common_l2msg_handler(u8 l2_header, - void *msg, u32 length, - struct shrm_dev *shrm) -{ - int ret = 0; -#ifdef CONFIG_U8500_SHRM_LOOP_BACK - u8 *pdata; -#endif - dev_dbg(shrm->dev, "%s IN\n", __func__); - - switch (l2_header) { - case ISI_MESSAGING: - ret = isi_receive(shrm, msg, length); - if (ret < 0) - dev_err(shrm->dev, "isi receive failed\n"); - break; - case RPC_MESSAGING: - ret = rpc_receive(shrm, msg, length); - if (ret < 0) - dev_err(shrm->dev, "rpc receive failed\n"); - break; - case SECURITY_MESSAGING: - ret = security_receive(shrm, msg, length); - if (ret < 0) - dev_err(shrm->dev, - "security receive failed\n"); - break; -#ifdef CONFIG_U8500_SHRM_LOOP_BACK - case COMMMON_LOOPBACK_MESSAGING: - pdata = (u8 *)msg; - if ((*pdata == 0x50) || (*pdata == 0xAF)) { - ret = isi_receive(shrm, msg, length); - if (ret < 0) - dev_err(shrm->dev, "isi receive failed\n"); - } else if ((*pdata == 0x0A) || (*pdata == 0xF5)) { - ret = rpc_receive(shrm, msg, length); - if (ret < 0) - dev_err(shrm->dev, "rpc receive failed\n"); - } else if ((*pdata == 0xFF) || (*pdata == 0x00)) { - ret = security_receive(shrm, msg, length); - if (ret < 0) - dev_err(shrm->dev, - "security receive failed\n"); - } - break; -#endif - default: - break; - } - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -static void rx_audio_l2msg_handler(u8 l2_header, - void *msg, u32 length, - struct shrm_dev *shrm) -{ - int ret = 0; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - audio_receive(shrm, msg, length); - if (ret < 0) - dev_err(shrm->dev, "audio receive failed\n"); - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -static int __init shm_initialise_irq(struct shrm_dev *shrm) -{ - int err = 0; - - shrm_protocol_init(shrm, - rx_common_l2msg_handler, rx_audio_l2msg_handler); - - err = request_irq(shrm->ca_wake_irq, - ca_wake_irq_handler, IRQF_TRIGGER_RISING, - "ca_wake-up", shrm); - if (err < 0) { - dev_err(shrm->dev, - "Unable to allocate shm tx interrupt line\n"); - return err; - } - - err = request_irq(shrm->ac_read_notif_0_irq, - ac_read_notif_0_irq_handler, 0, - "ac_read_notif_0", shrm); - if (err < 0) { - dev_err(shrm->dev, - "error ac_read_notif_0_irq interrupt line\n"); - goto irq_err1; - } - - err = request_irq(shrm->ac_read_notif_1_irq, - ac_read_notif_1_irq_handler, 0, - "ac_read_notif_1", shrm); - if (err < 0) { - dev_err(shrm->dev, - "error ac_read_notif_1_irq interrupt line\n"); - goto irq_err2; - } - - err = request_irq(shrm->ca_msg_pending_notif_0_irq, - ca_msg_pending_notif_0_irq_handler, 0, - "ca_msg_pending_notif_0", shrm); - if (err < 0) { - dev_err(shrm->dev, - "error ca_msg_pending_notif_0_irq line\n"); - goto irq_err3; - } - - err = request_irq(shrm->ca_msg_pending_notif_1_irq, - ca_msg_pending_notif_1_irq_handler, 0, - "ca_msg_pending_notif_1", shrm); - if (err < 0) { - dev_err(shrm->dev, - "error ca_msg_pending_notif_1_irq interrupt line\n"); - goto irq_err4; - } - - return err; - -irq_err4: - free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); -irq_err3: - free_irq(shrm->ac_read_notif_1_irq, shrm); -irq_err2: - free_irq(shrm->ac_read_notif_0_irq, shrm); -irq_err1: - free_irq(shrm->ca_wake_irq, shrm); - return err; -} - -static void free_shm_irq(struct shrm_dev *shrm) -{ - free_irq(shrm->ca_wake_irq, shrm); - free_irq(shrm->ac_read_notif_0_irq, shrm); - free_irq(shrm->ac_read_notif_1_irq, shrm); - free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); - free_irq(shrm->ca_msg_pending_notif_1_irq, shrm); -} - -/** - * create_queue() - To create FIFO for Tx and Rx message buffering. - * @q: message queue. - * @devicetype: device type 0-isi,1-rpc,2-audio,3-security. - * - * This function creates a FIFO buffer of n_bytes size using - * dma_alloc_coherent(). It also initializes all queue handling - * locks, queue management pointers. It also initializes message list - * which occupies this queue. - * - * It return -ENOMEM in case of no memory. - */ -static int create_queue(struct message_queue *q, u32 devicetype, - struct shrm_dev *shrm) -{ - q->fifo_base = (u8 *)&message_fifo[devicetype]; - q->size = SIZE_OF_FIFO; - q->readptr = 0; - q->writeptr = 0; - q->no = 0; - q->shrm = shrm; - spin_lock_init(&q->update_lock); - INIT_LIST_HEAD(&q->msg_list); - init_waitqueue_head(&q->wq_readable); - atomic_set(&q->q_rp, 0); - - return 0; -} -/** - * delete_queue() - To delete FIFO and assiciated memory. - * @q: message queue - * - * This function deletes FIFO created using create_queue() function. - * It resets queue management pointers. - */ -static void delete_queue(struct message_queue *q) -{ - q->size = 0; - q->readptr = 0; - q->writeptr = 0; -} - -/** - * add_msg_to_queue() - Add a message inside inside queue - * - * @q: message queue - * @size: size in bytes - * - * This function tries to allocate n_bytes of size in FIFO q. - * It returns negative number when no memory can be allocated - * currently. - */ -int add_msg_to_queue(struct message_queue *q, u32 size) -{ - struct queue_element *new_msg = NULL; - struct shrm_dev *shrm = q->shrm; - - dev_dbg(shrm->dev, "%s IN q->writeptr=%d\n", - __func__, q->writeptr); - new_msg = kmalloc(sizeof(struct queue_element), - GFP_KERNEL|GFP_ATOMIC); - - if (new_msg == NULL) { - dev_err(shrm->dev, "memory overflow inside while(1)\n"); - return -ENOMEM; - } - new_msg->offset = q->writeptr; - new_msg->size = size; - new_msg->no = q->no++; - - /* check for overflow condition */ - if (q->readptr <= q->writeptr) { - if (((q->writeptr-q->readptr) + size) >= q->size) { - dev_err(shrm->dev, "Buffer overflow !!\n"); - BUG_ON(((q->writeptr-q->readptr) + size) >= q->size); - } - } else { - if ((q->writeptr + size) >= q->readptr) { - dev_err(shrm->dev, "Buffer overflow !!\n"); - BUG_ON((q->writeptr + size) >= q->readptr); - } - } - q->writeptr = (q->writeptr + size) % q->size; - if (list_empty(&q->msg_list)) { - list_add_tail(&new_msg->entry, &q->msg_list); - /* There can be 2 blocking calls read and another select */ - - atomic_set(&q->q_rp, 1); - wake_up_interruptible(&q->wq_readable); - } else - list_add_tail(&new_msg->entry, &q->msg_list); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return 0; -} - -/** - * remove_msg_from_queue() - To remove a message from the msg queue. - * - * @q: message queue - * - * This function delets a message from the message list associated with message - * queue q and also updates read ptr. - * If the message list is empty, then, event is set to block the select and - * read calls of the paricular queue. - * - * The message list is FIFO style and message is always added to tail and - * removed from head. - */ - -int remove_msg_from_queue(struct message_queue *q) -{ - struct queue_element *old_msg = NULL; - struct shrm_dev *shrm = q->shrm; - struct list_head *msg; - - dev_dbg(shrm->dev, "%s IN q->readptr %d\n", - __func__, q->readptr); - - list_for_each(msg, &q->msg_list) { - old_msg = list_entry(msg, struct queue_element, entry); - if (old_msg == NULL) { - dev_err(shrm->dev, ":no message found\n"); - return -EFAULT; - } - break; - } - list_del(msg); - q->readptr = (q->readptr + old_msg->size) % q->size; - if (list_empty(&q->msg_list)) { - dev_dbg(shrm->dev, "List is empty setting RP= 0\n"); - atomic_set(&q->q_rp, 0); - } - kfree(old_msg); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return 0; -} - -/** - * get_size_of_new_msg() - retrieve new message from message list - * - * @q: message queue - * - * This function will retrieve most recent message from the corresponding - * queue list. New message is always retrieved from head side. - * It returns new message no, offset if FIFO and size. - */ -int get_size_of_new_msg(struct message_queue *q) -{ - struct queue_element *new_msg = NULL; - struct list_head *msg_list; - struct shrm_dev *shrm = q->shrm; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - spin_lock_bh(&q->update_lock); - list_for_each(msg_list, &q->msg_list) { - new_msg = list_entry(msg_list, struct queue_element, entry); - if (new_msg == NULL) { - spin_unlock_bh(&q->update_lock); - dev_err(shrm->dev, "no message found\n"); - return -1; - } - break; - } - spin_unlock_bh(&q->update_lock); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return new_msg->size; -} - -/** - * isi_receive() - Rx Completion callback - * - * @data:message pointer - * @n_bytes:message size - * - * This function is a callback to indicate ISI message reception is complete. - * It updates Writeptr of the Fifo - */ -static int isi_receive(struct shrm_dev *shrm, - void *data, u32 n_bytes) -{ - u32 size = 0; - int ret = 0; - u8 *psrc; - struct message_queue *q; - struct isadev_context *isidev = &shrm->isa_context->isadev[0]; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - q = &isidev->dl_queue; - spin_lock(&q->update_lock); - /* Memcopy RX data first */ - if ((q->writeptr+n_bytes) >= q->size) { - dev_dbg(shrm->dev, "Inside Loop Back\n"); - psrc = (u8 *)data; - size = (q->size-q->writeptr); - /* Copy First Part of msg */ - memcpy((q->fifo_base+q->writeptr), psrc, size); - psrc += size; - /* Copy Second Part of msg at the top of fifo */ - memcpy(q->fifo_base, psrc, (n_bytes-size)); - } else { - memcpy((q->fifo_base+q->writeptr), data, n_bytes); - } - ret = add_msg_to_queue(q, n_bytes); - if (ret < 0) - dev_err(shrm->dev, "Adding msg to message queue failed\n"); - spin_unlock(&q->update_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return ret; -} - -/** - * rpc_receive() - Rx Completion callback - * - * @data:message pointer - * @n_bytes:message size - * - * This function is a callback to indicate RPC message reception is complete. - * It updates Writeptr of the Fifo - */ -static int rpc_receive(struct shrm_dev *shrm, - void *data, u32 n_bytes) -{ - u32 size = 0; - int ret = 0; - u8 *psrc; - struct message_queue *q; - struct isadev_context *rpcdev = &shrm->isa_context->isadev[1]; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - q = &rpcdev->dl_queue; - spin_lock(&q->update_lock); - /* Memcopy RX data first */ - if ((q->writeptr+n_bytes) >= q->size) { - psrc = (u8 *)data; - size = (q->size-q->writeptr); - /* Copy First Part of msg */ - memcpy((q->fifo_base+q->writeptr), psrc, size); - psrc += size; - /* Copy Second Part of msg at the top of fifo */ - memcpy(q->fifo_base, psrc, (n_bytes-size)); - } else { - memcpy((q->fifo_base+q->writeptr), data, n_bytes); - } - - ret = add_msg_to_queue(q, n_bytes); - if (ret < 0) - dev_err(shrm->dev, "Adding msg to message queue failed\n"); - spin_unlock(&q->update_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return ret; -} - -/** - * audio_receive() - Rx Completion callback - * - * @data:message pointer - * @n_bytes:message size - * - * This function is a callback to indicate audio message reception is complete. - * It updates Writeptr of the Fifo - */ -static int audio_receive(struct shrm_dev *shrm, - void *data, u32 n_bytes) -{ - u32 size = 0; - int ret = 0; - u8 *psrc; - struct message_queue *q; - struct isadev_context *audiodev = &shrm->isa_context->isadev[2]; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - q = &audiodev->dl_queue; - spin_lock(&q->update_lock); - /* Memcopy RX data first */ - if ((q->writeptr+n_bytes) >= q->size) { - psrc = (u8 *)data; - size = (q->size-q->writeptr); - /* Copy First Part of msg */ - memcpy((q->fifo_base+q->writeptr), psrc, size); - psrc += size; - /* Copy Second Part of msg at the top of fifo */ - memcpy(q->fifo_base, psrc, (n_bytes-size)); - } else { - memcpy((q->fifo_base+q->writeptr), data, n_bytes); - } - ret = add_msg_to_queue(q, n_bytes); - if (ret < 0) - dev_err(shrm->dev, "Adding msg to message queue failed\n"); - spin_unlock(&q->update_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return ret; -} - -/** - * security_receive() - Rx Completion callback - * - * @data:message pointer - * @n_bytes: message size - * - * This function is a callback to indicate security message reception - * is complete.It updates Writeptr of the Fifo - */ -static int security_receive(struct shrm_dev *shrm, - void *data, u32 n_bytes) -{ - u32 size = 0; - int ret = 0; - u8 *psrc; - struct message_queue *q; - struct isadev_context *secdev = &shrm->isa_context->isadev[3]; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - q = &secdev->dl_queue; - spin_lock(&q->update_lock); - /* Memcopy RX data first */ - if ((q->writeptr+n_bytes) >= q->size) { - psrc = (u8 *)data; - size = (q->size-q->writeptr); - /* Copy First Part of msg */ - memcpy((q->fifo_base+q->writeptr), psrc, size); - psrc += size; - /* Copy Second Part of msg at the top of fifo */ - memcpy(q->fifo_base, psrc, (n_bytes-size)); - } else { - memcpy((q->fifo_base+q->writeptr), data, n_bytes); - } - ret = add_msg_to_queue(q, n_bytes); - if (ret < 0) - dev_err(shrm->dev, "Adding msg to message queue failed\n"); - spin_unlock(&q->update_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return ret; -} - - -/** - * isa_select() - Select Interface - * - * @filp:file descriptor pointer - * @wait:poll_table_struct pointer - * - * This function is used to perform non-blocking read operations. It allows - * a process to determine whether it can read from one or more open files - * without blocking. These calls can also block a process until any of a - * given set of file descriptors becomes available for reading. - * If a file is ready to read, POLLIN | POLLRDNORM bitmask is returned. - * The driver method is called whenever the user-space program performs a select - * system call involving a file descriptor associated with the driver. - */ -static u32 isa_select(struct file *filp, - struct poll_table_struct *wait) -{ - struct isadev_context *isadev = filp->private_data; - struct shrm_dev *shrm = isadev->dl_queue.shrm; - struct message_queue *q; - u32 mask = 0; - u32 m = iminor(filp->f_path.dentry->d_inode); - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (isadev->device_id != m) - return -1; - q = &isadev->dl_queue; - poll_wait(filp, &q->wq_readable, wait); - if (atomic_read(&q->q_rp) == 1) - mask = POLLIN | POLLRDNORM; - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return mask; -} - -/** - * isa_read() - Read from device - * - * @filp:file descriptor - * @buf:user buffer pointer - * @len:size of requested data transfer - * @ppos:not used - * - * This function is called whenever user calls read() system call. - * It reads a oldest message from queue and copies it into user buffer and - * returns its size. - * If there is no message present in queue, then it blocks until new data is - * available. - */ -ssize_t isa_read(struct file *filp, char __user *buf, - size_t len, loff_t *ppos) -{ - struct isadev_context *isadev = (struct isadev_context *) - filp->private_data; - struct shrm_dev *shrm = isadev->dl_queue.shrm; - struct message_queue *q; - char *psrc; - u32 msgsize; - u32 size = 0; - int ret = 0; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (len <= 0) - return -EFAULT; - q = &isadev->dl_queue; - - spin_lock_bh(&q->update_lock); - if (list_empty(&q->msg_list)) { - spin_unlock_bh(&q->update_lock); - if (wait_event_interruptible(q->wq_readable, - atomic_read(&q->q_rp) == 1)) { - return -ERESTARTSYS; - } - } else - spin_unlock_bh(&q->update_lock); - - msgsize = get_size_of_new_msg(q); - if ((q->readptr+msgsize) >= q->size) { - dev_dbg(shrm->dev, "Inside Loop Back\n"); - psrc = (char *)buf; - size = (q->size-q->readptr); - /* Copy First Part of msg */ - if (copy_to_user(psrc, - (u8 *)(q->fifo_base+q->readptr), - size)) { - dev_err(shrm->dev, "copy_to_user failed\n"); - return -EFAULT; - } - psrc += size; - /* Copy Second Part of msg at the top of fifo */ - if (copy_to_user(psrc, - (u8 *)(q->fifo_base), - (msgsize-size))) { - dev_err(shrm->dev, "copy_to_user failed\n"); - return -EFAULT; - } - } else { - if (copy_to_user(buf, - (u8 *)(q->fifo_base+q->readptr), - msgsize)) { - dev_err(shrm->dev, "copy_to_user failed\n"); - return -EFAULT; - } - } - - spin_lock_bh(&q->update_lock); - ret = remove_msg_from_queue(q); - if (ret < 0) { - dev_err(shrm->dev, - "Removing msg from message queue failed\n"); - msgsize = ret; - } - spin_unlock_bh(&q->update_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return msgsize; -} -/** - * isa_write() - Write to device - * - * @filp:file descriptor - * @buf:user buffer pointer - * @len:size of requested data transfer - * @ppos:not used - * - * This function is called whenever user calls write() system call. - * It checks if there is space available in queue, and copies the message - * inside queue. If there is no space, it blocks until space becomes available. - * It also schedules transfer thread to transmit the newly added message. - */ -static ssize_t isa_write(struct file *filp, const char __user *buf, - size_t len, loff_t *ppos) -{ - struct isadev_context *isadev = filp->private_data; - struct shrm_dev *shrm = isadev->dl_queue.shrm; - struct message_queue *q; - int err, ret; - void *addr = 0; - u8 l2_header = 0; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - if (len <= 0) - return -EFAULT; - q = &isadev->dl_queue; - - switch (isadev->device_id) { - case ISI_MESSAGING: - dev_dbg(shrm->dev, "ISI\n"); - addr = (void *)wr_isi_msg; -#ifdef CONFIG_U8500_SHRM_LOOP_BACK - dev_dbg(shrm->dev, "Loopback\n"); - l2_header = COMMON_LOOPBACK_MESSAGING; -#else - l2_header = isadev->device_id; -#endif - break; - case RPC_MESSAGING: - dev_dbg(shrm->dev, "RPC\n"); - addr = (void *)wr_rpc_msg; -#ifdef CONFIG_U8500_SHRM_LOOP_BACK - l2_header = COMMON_LOOPBACK_MESSAGING; -#else - l2_header = isadev->device_id; -#endif - break; - case AUDIO_MESSAGING: - dev_dbg(shrm->dev, "Audio\n"); - addr = (void *)wr_audio_msg; -#ifdef CONFIG_U8500_SHRM_LOOP_BACK - l2_header = AUDIO_LOOPBACK_MESSAGING; -#else - l2_header = isadev->device_id; -#endif - - break; - case SECURITY_MESSAGING: - dev_dbg(shrm->dev, "Security\n"); - addr = (void *)wr_sec_msg; -#ifdef CONFIG_U8500_SHRM_LOOP_BACK - l2_header = COMMON_LOOPBACK_MESSAGING; -#else - l2_header = isadev->device_id; -#endif - break; - default: - dev_dbg(shrm->dev, "Wrong device\n"); - return -EFAULT; - } - - if (copy_from_user(addr, buf, len)) { - dev_err(shrm->dev, "copy_from_user failed\n"); - return -EFAULT; - } - - /* Write msg to Fifo */ - if (isadev->device_id == 2) { - mutex_lock(&shrm->isa_context->tx_audio_mutex); - err = shm_write_msg(shrm, l2_header, addr, len); - if (!err) - ret = len; - else - ret = err; - mutex_unlock(&shrm->isa_context->tx_audio_mutex); - } else { - spin_lock_bh(&shrm->isa_context->common_tx); - err = shm_write_msg(shrm, l2_header, addr, len); - if (!err) - ret = len; - else - ret = err; - spin_unlock_bh(&shrm->isa_context->common_tx); - } - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return ret; -} - -/** - * isa_ioctl() - To handle different ioctl commands supported by driver. - * - * @inode: structure is used by the kernel internally to represent files - * @filp:file descriptor pointer - * @cmd:ioctl command - * @arg:input param - * - * Following ioctls are supported by this driver. - * DLP_IOCTL_ALLOCATE_BUFFER - To allocate buffer for new uplink message. - * This ioctl is called with required message size. It returns offset for - * the allocates space in the queue. DLP_IOCTL_PUT_MESSAGE - To indicate - * new uplink message available in queuq for transmission. Message is copied - * from offset location returned by previous ioctl before calling this ioctl. - * DLP_IOCTL_GET_MESSAGE - To check if any downlink message is available in - * queue. It returns offset for new message inside queue. - * DLP_IOCTL_DEALLOCATE_BUFFER - To deallocate any buffer allocate for - * downlink message once the message is copied. Message is copied from offset - * location returned by previous ioctl before calling this ioctl. - */ -static int isa_ioctl(struct inode *inode, struct file *filp, - unsigned cmd, unsigned long arg) -{ - int err = 0; - struct isadev_context *isadev = filp->private_data; - struct shrm_dev *shrm = isadev->dl_queue.shrm; - u32 m = iminor(inode); - - if (isadev->device_id != m) - return -1; - - switch (cmd) { - case DLP_IOC_ALLOCATE_BUFFER: - dev_dbg(shrm->dev, "DLP_IOC_ALLOCATE_BUFFER\n"); - break; - case DLP_IOC_PUT_MESSAGE: - dev_dbg(shrm->dev, "DLP_IOC_PUT_MESSAGE\n"); - break; - case DLP_IOC_GET_MESSAGE: - dev_dbg(shrm->dev, "DLP_IOC_GET_MESSAGE\n"); - break; - case DLP_IOC_DEALLOCATE_BUFFER: - dev_dbg(shrm->dev, "DLP_IOC_DEALLOCATE_BUFFER\n"); - break; - default: - dev_dbg(shrm->dev, "Unknown IOCTL\n"); - err = -1; - break; - } - return err; -} -/** - * isa_mmap() - Maps kernel queue memory to user space. - * - * @filp:file descriptor pointer - * @vma:virtual area memory structure. - * - * This function maps kernel FIFO into user space. This function - * shall be called twice to map both uplink and downlink buffers. - */ -static int isa_mmap(struct file *filp, struct vm_area_struct *vma) -{ - struct isadev_context *isadev = filp->private_data; - struct shrm_dev *shrm = isadev->dl_queue.shrm; - - u32 m = iminor(filp->f_path.dentry->d_inode); - dev_dbg(shrm->dev, "%s %dIN\n", __func__, m); - - isadev = (struct isadev_context *)filp->private_data; - return 0; -} - -/** - * isa_close() - Close device file - * - * @inode:structure is used by the kernel internally to represent files - * @filp:device file descriptor - * - * This function deletes structues associated with this file, deletes - * queues, flushes and destroys workqueus and closes this file. - * It also unregisters itself from l2mux driver. - */ -static int isa_close(struct inode *inode, struct file *filp) -{ - struct isadev_context *isadev = filp->private_data; - struct shrm_dev *shrm = isadev->dl_queue.shrm; - struct isa_driver_context *isa_context = shrm->isa_context; - u8 m; - - mutex_lock(&isa_lock); - m = iminor(filp->f_path.dentry->d_inode); - dev_dbg(shrm->dev, "%s IN %d", __func__, m); - - if (atomic_dec_and_test(&isa_context->is_open[m])) { - atomic_inc(&isa_context->is_open[m]); - dev_err(shrm->dev, "Device not opened yet\n"); - mutex_unlock(&isa_lock); - return -ENODEV; - } - atomic_set(&isa_context->is_open[m], 1); - - dev_dbg(shrm->dev, "isadev->device_id %d", isadev->device_id); - dev_dbg(shrm->dev, "Closed %d device\n", m); - - if (m == ISI_MESSAGING) - dev_dbg(shrm->dev, "Closed ISI_MESSAGING Device\n"); - else if (m == RPC_MESSAGING) - dev_dbg(shrm->dev, "Closed RPC_MESSAGING Device\n"); - else if (m == AUDIO_MESSAGING) - dev_dbg(shrm->dev, "Closed AUDIO_MESSAGING Device\n"); - else if (m == SECURITY_MESSAGING) - dev_dbg(shrm->dev, "Closed SECURITY_MESSAGING Device\n"); - else - dev_dbg(shrm->dev, NAME ":No such device present\n"); - - mutex_unlock(&isa_lock); - return 0; -} -/** - * isa_open() - Open device file - * - * @inode: structure is used by the kernel internally to represent files - * @filp: device file descriptor - * - * This function performs initialization tasks needed to open SHM channel. - * Following tasks are performed. - * -return if device is already opened - * -create uplink FIFO - * -create downlink FIFO - * -init delayed workqueue thread - * -register to l2mux driver - */ -static int isa_open(struct inode *inode, struct file *filp) -{ - int err = 0; - u8 m; - struct isadev_context *isadev; - struct isa_driver_context *isa_context = container_of( - inode->i_cdev, - struct isa_driver_context, - cdev); - struct shrm_dev *shrm = isa_context->isadev->dl_queue.shrm; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (get_boot_state() != BOOT_DONE) { - dev_err(shrm->dev, "Boot is not done\n"); - return -EBUSY; - } - mutex_lock(&isa_lock); - m = iminor(inode); - - if ((m != ISI_MESSAGING) && (m != RPC_MESSAGING) && - (m != AUDIO_MESSAGING) && (m != SECURITY_MESSAGING)) { - dev_err(shrm->dev, "No such device present\n"); - mutex_unlock(&isa_lock); - return -ENODEV; - } - if (!atomic_dec_and_test(&isa_context->is_open[m])) { - atomic_inc(&isa_context->is_open[m]); - dev_err(shrm->dev, "Device already opened\n"); - mutex_unlock(&isa_lock); - return -EBUSY; - } - - if (m == ISI_MESSAGING) - dev_dbg(shrm->dev, "Open ISI_MESSAGING Device\n"); - else if (m == RPC_MESSAGING) - dev_dbg(shrm->dev, "Open RPC_MESSAGING Device\n"); - else if (m == AUDIO_MESSAGING) - dev_dbg(shrm->dev, "Open AUDIO_MESSAGING Device\n"); - else if (m == SECURITY_MESSAGING) - dev_dbg(shrm->dev, "Open SECURITY_MESSAGING Device\n"); - else - dev_dbg(shrm->dev, ":No such device present\n"); - - isadev = &isa_context->isadev[m]; - if (filp != NULL) - filp->private_data = isadev; - - mutex_unlock(&isa_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return err; -} - -const struct file_operations isa_fops = { - .owner = THIS_MODULE, - .open = isa_open, - .release = isa_close, - .ioctl = isa_ioctl, - .mmap = isa_mmap, - .read = isa_read, - .write = isa_write, - .poll = isa_select, -}; - -/** - * isa_init() - module insertion function - * - * This function registers module as a character driver using - * register_chrdev_region() or alloc_chrdev_region. It adds this - * driver to system using cdev_add() call. Major number is dynamically - * allocated using alloc_chrdev_region() by default or left to user to specify - * it during load time. For this variable major is used as module_param - * Nodes to be created using - * mknod /dev/isi c $major 0 - * mknod /dev/rpc c $major 1 - * mknod /dev/audio c $major 2 - * mknod /dev/sec c $major 3 - */ -int isa_init(struct shrm_dev *shrm) -{ - dev_t dev_id; - int retval, no_dev; - struct isadev_context *isadev; - struct isa_driver_context *isa_context; - - isa_context = kzalloc(sizeof(struct isa_driver_context), - GFP_KERNEL); - shrm->isa_context = isa_context; - if (isa_context == NULL) { - dev_err(shrm->dev, "Failed to alloc memory\n"); - return -ENOMEM; - } - - if (major) { - dev_id = MKDEV(major, 0); - retval = register_chrdev_region(dev_id, ISA_DEVICES, NAME); - } else { - retval = alloc_chrdev_region(&dev_id, 0, ISA_DEVICES, NAME); - major = MAJOR(dev_id); - } - - dev_dbg(shrm->dev, "major %d\n", major); - - cdev_init(&isa_context->cdev, &isa_fops); - isa_context->cdev.owner = THIS_MODULE; - retval = cdev_add(&isa_context->cdev, dev_id, ISA_DEVICES); - if (retval) { - dev_err(shrm->dev, "Failed to add char device\n"); - return retval; - } - - for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) - atomic_set(&isa_context->is_open[no_dev], 1); - - isa_context->isadev = kzalloc(sizeof - (struct isadev_context)*ISA_DEVICES, - GFP_KERNEL); - if (isa_context->isadev == NULL) { - dev_err(shrm->dev, "Failed to alloc memory\n"); - return -ENOMEM; - } - for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) { - isadev = &isa_context->isadev[no_dev]; - isadev->device_id = no_dev; - retval = create_queue(&isadev->dl_queue, - isadev->device_id, shrm); - if (retval < 0) { - dev_err(shrm->dev, "create dl_queue failed\n"); - delete_queue(&isadev->dl_queue); - kfree(isadev); - return retval; - } - } - mutex_init(&isa_context->tx_audio_mutex); - spin_lock_init(&isa_context->common_tx); - - dev_err(shrm->dev, "SHRM char driver added\n"); - - return retval; -} - -void isa_exit(struct shrm_dev *shrm) -{ - int no_dev; - struct isadev_context *isadev; - struct isa_driver_context *isa_context = shrm->isa_context; - dev_t dev_id = MKDEV(major, 0); - - for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) { - isadev = &isa_context->isadev[no_dev]; - delete_queue(&isadev->dl_queue); - kfree(isadev); - } - - cdev_del(&isa_context->cdev); - unregister_chrdev_region(dev_id, ISA_DEVICES); - kfree(isa_context); - - dev_err(shrm->dev, "SHRM char driver removed\n"); -} - -#ifdef CONFIG_HIGH_RES_TIMERS -static enum hrtimer_restart callback(struct hrtimer *timer) -{ - return HRTIMER_NORESTART; -} -#endif - - -static int __init shrm_probe(struct platform_device *pdev) -{ - int err = 0; - struct resource *res; - struct shrm_dev *shrm = NULL; - - if (pdev == NULL) { - dev_err(shrm->dev, - "No device/platform_data found on shm device\n"); - return -ENODEV; - } - - - shrm = kzalloc(sizeof(struct shrm_dev), GFP_KERNEL); - if (shrm == NULL) { - dev_err(shrm->dev, - "Could not allocate memory for struct shm_dev\n"); - return -ENOMEM; - } - shrm->dev = &pdev->dev; - - /* initialise the SHM */ - - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res) { - dev_err(shrm->dev, "Unable to map Ca Wake up interrupt\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ca_wake_irq = res->start; - - res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); - if (!res) { - dev_err(shrm->dev, - "Unable to map APE_Read_notif_common IRQ base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ac_read_notif_0_irq = res->start; - - res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); - if (!res) { - dev_err(shrm->dev, - "Unable to map APE_Read_notif_audio IRQ base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ac_read_notif_1_irq = res->start; - - res = platform_get_resource(pdev, IORESOURCE_IRQ, 3); - if (!res) { - dev_err(shrm->dev, - "Unable to map Cmt_msg_pending_notif_common IRQ base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ca_msg_pending_notif_0_irq = res->start; - - res = platform_get_resource(pdev, IORESOURCE_IRQ, 4); - if (!res) { - dev_err(shrm->dev, - "Unable to map Cmt_msg_pending_notif_audio IRQ base\n"); - err = -EBUSY; - goto rollback_intr; - } - shrm->ca_msg_pending_notif_1_irq = res->start; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(shrm->dev, - "Could not get SHM IO memory information\n"); - err = -ENODEV; - goto rollback_intr; - } - - shrm->intr_base = (void __iomem *)ioremap_nocache(res->start, - res->end - res->start + 1); - - if (!(shrm->intr_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_intr; - } - - shrm->ape_common_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_APE_COMMON_BASE; - shrm->ape_common_fifo_base = - (void __iomem *)ioremap_nocache( - U8500_SHM_FIFO_APE_COMMON_BASE, - SHM_FIFO_0_SIZE); - shrm->ape_common_fifo_size = (SHM_FIFO_0_SIZE)/4; - - if (!(shrm->ape_common_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_ape_common_fifo_base; - } - - shrm->cmt_common_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_CMT_COMMON_BASE; - - shrm->cmt_common_fifo_base = - (void __iomem *)ioremap_nocache( - U8500_SHM_FIFO_CMT_COMMON_BASE, SHM_FIFO_0_SIZE); - shrm->cmt_common_fifo_size = (SHM_FIFO_0_SIZE)/4; - - if (!(shrm->cmt_common_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_cmt_common_fifo_base; - } - - shrm->ape_audio_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_APE_AUDIO_BASE; - shrm->ape_audio_fifo_base = - (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_APE_AUDIO_BASE, - SHM_FIFO_1_SIZE); - shrm->ape_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; - - if (!(shrm->ape_audio_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_ape_audio_fifo_base; - } - - shrm->cmt_audio_fifo_base_phy = - (u32 *)U8500_SHM_FIFO_CMT_AUDIO_BASE; - shrm->cmt_audio_fifo_base = - (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_CMT_AUDIO_BASE, - SHM_FIFO_1_SIZE); - shrm->cmt_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; - - if (!(shrm->cmt_audio_fifo_base)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_cmt_audio_fifo_base; - } - - shrm->ac_common_shared_wptr = - (void __iomem *)ioremap(SHM_ACFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_common_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_ac_common_shared_wptr; - } - - shrm->ac_common_shared_rptr = - (void __iomem *)ioremap(SHM_ACFIFO_0_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_common_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - - shrm->ca_common_shared_wptr = - (void __iomem *)ioremap(SHM_CAFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_common_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - shrm->ca_common_shared_rptr = - (void __iomem *)ioremap(SHM_CAFIFO_0_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_common_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - - shrm->ac_audio_shared_wptr = - (void __iomem *)ioremap(SHM_ACFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_audio_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - - shrm->ac_audio_shared_rptr = - (void __iomem *)ioremap(SHM_ACFIFO_1_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ac_audio_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - - shrm->ca_audio_shared_wptr = - (void __iomem *)ioremap(SHM_CAFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_audio_shared_wptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - - shrm->ca_audio_shared_rptr = - (void __iomem *)ioremap(SHM_CAFIFO_1_READ_AMCU, SHM_PTR_SIZE); - - if (!(shrm->ca_audio_shared_rptr)) { - dev_err(shrm->dev, "Unable to map register base\n"); - err = -EBUSY; - goto rollback_map; - } - - - if (isa_init(shrm) != 0) { - dev_err(shrm->dev, "Driver Initialization Error\n"); - err = -EBUSY; - } - /* install handlers and tasklets */ - if (shm_initialise_irq(shrm)) { - dev_err(shrm->dev, "shm error in interrupt registration\n"); - goto rollback_irq; - } - -#ifdef CONFIG_HIGH_RES_TIMERS - hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - timer.function = callback; - - hrtimer_start(&timer, ktime_set(0, 2*NSEC_PER_MSEC), HRTIMER_MODE_REL); -#endif - - return err; - -rollback_irq: - free_shm_irq(shrm); -rollback_map: - iounmap(shrm->ac_common_shared_wptr); - iounmap(shrm->ac_common_shared_rptr); - iounmap(shrm->ca_common_shared_wptr); - iounmap(shrm->ca_common_shared_rptr); - iounmap(shrm->ac_audio_shared_wptr); - iounmap(shrm->ac_audio_shared_rptr); - iounmap(shrm->ca_audio_shared_wptr); - iounmap(shrm->ca_audio_shared_rptr); -rollback_ac_common_shared_wptr: - iounmap(shrm->cmt_audio_fifo_base); -rollback_cmt_audio_fifo_base: - iounmap(shrm->ape_audio_fifo_base); -rollback_ape_audio_fifo_base: - iounmap(shrm->cmt_common_fifo_base); -rollback_cmt_common_fifo_base: - iounmap(shrm->ape_common_fifo_base); -rollback_ape_common_fifo_base: - iounmap(shrm->intr_base); -rollback_intr: - kfree(shrm); - return err; -} - -static int __exit shrm_remove(struct platform_device *pdev) -{ - struct shrm_dev *shrm = platform_get_drvdata(pdev); - - free_shm_irq(shrm); - iounmap(shrm->intr_base); - iounmap(shrm->ape_common_fifo_base); - iounmap(shrm->cmt_common_fifo_base); - iounmap(shrm->ape_audio_fifo_base); - iounmap(shrm->cmt_audio_fifo_base); - iounmap(shrm->ac_common_shared_wptr); - iounmap(shrm->ac_common_shared_rptr); - iounmap(shrm->ca_common_shared_wptr); - iounmap(shrm->ca_common_shared_rptr); - iounmap(shrm->ac_audio_shared_wptr); - iounmap(shrm->ac_audio_shared_rptr); - iounmap(shrm->ca_audio_shared_wptr); - iounmap(shrm->ca_audio_shared_rptr); - kfree(shrm); - isa_exit(shrm); - - return 0; -} -#ifdef CONFIG_PM - -/** - * u8500_shrm_suspend() - This routine puts the SHRM in to sustend state. - * @pdev: platform device. - * - * This routine checks the current ongoing communication with Modem by - * examining the ca_wake state and prevents suspend if modem communication - * is on-going. - * If ca_wake = 1 (high), modem comm. is on-going; don't suspend - * If ca_wake = 0 (low), no comm. with modem on-going.Allow suspend - */ -int u8500_shrm_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct shrm_dev *shrm = platform_get_drvdata(pdev); - - dev_dbg(shrm->dev, "%s called...\n", __func__); - dev_dbg(shrm->dev, "\n ca_wake_req_state = %x\n", - get_ca_wake_req_state()); - /* if ca_wake_req is high, prevent system suspend */ - if (get_ca_wake_req_state()) - return -EBUSY; - else - return 0; -} - -/** - * u8500_shrm_resume() - This routine resumes the SHRM from sustend state. - * @pdev: platform device. - * - * This routine restore back the current state of the SHRM - */ -int u8500_shrm_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct shrm_dev *shrm = platform_get_drvdata(pdev); - - dev_dbg(shrm->dev, "%s called...\n", __func__); - /* TODO: - * As of now, no state save takes place in suspend. - * So, nothing to restore in resume. - * Simply return as of now. - * State saved in suspend should be restored here. - */ - - return 0; -} - -static const struct dev_pm_ops shrm_dev_pm_ops = { - .suspend = u8500_shrm_suspend, - .resume = u8500_shrm_resume, -}; -#endif - -static struct platform_driver shrm_driver = { - .remove = __exit_p(shrm_remove), - .driver = { - .name = "u8500_shrm", - .owner = THIS_MODULE, -#ifdef CONFIG_PM - .pm = &shrm_dev_pm_ops, -#endif - }, -}; - -static int __init shrm_driver_init(void) -{ - return platform_driver_probe(&shrm_driver, shrm_probe); -} - -static void __exit shrm_driver_exit(void) -{ - platform_driver_unregister(&shrm_driver); -} - -module_init(shrm_driver_init); -module_exit(shrm_driver_exit); - -MODULE_AUTHOR("Biju Das"); -MODULE_DESCRIPTION("Shared Memory Modem Driver Interface"); -MODULE_LICENSE("GPL"); diff --git a/drivers/misc/shrm/shrm_fifo.c b/drivers/misc/shrm/shrm_fifo.c deleted file mode 100644 index cbe0949a56d..00000000000 --- a/drivers/misc/shrm/shrm_fifo.c +++ /dev/null @@ -1,827 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghavi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#include -#include -#include -#include - -#define L1_BOOT_INFO_REQ 1 -#define L1_BOOT_INFO_RESP 2 -#define L1_NORMAL_MSG 3 -#define L1_HEADER_MASK 28 -#define L1_MAPID_MASK 0xF0000000 -#define CONFIG_OFFSET 8 -#define COUNTER_OFFSET 20 -#define L2_HEADER_SIZE 4 -#define L2_HEADER_OFFSET 24 -#define MASK_0_15_BIT 0xFF -#define MASK_16_31_BIT 0xFF00 -#define MASK_16_27_BIT 0xFFF0000 -#define MASK_0_39_BIT 0xFFFFF -#define MASK_40_55_BIT 0xFF00000 -#define MASK_8_16_BIT 0x0000FF00 -#define MSG_LEN_OFFSET 16 -#define SHRM_VER 2 -#define ca_ist_inactivity_timer 100 /*100ms */ -#define ca_csc_inactivity_timer 100 /*100ms */ - -static u8 msg_audio_counter; -static u8 msg_common_counter; - -struct fifo_write_params ape_shm_fifo_0; -struct fifo_write_params ape_shm_fifo_1; -struct fifo_read_params cmt_shm_fifo_0; -struct fifo_read_params cmt_shm_fifo_1; - - -static u8 cmt_read_notif_0_send; -static u8 cmt_read_notif_1_send; - -void shm_fifo_init(struct shrm_dev *shrm) -{ - ape_shm_fifo_0.writer_local_wptr = 0; - ape_shm_fifo_0.writer_local_rptr = 0; - *((u32 *)shrm->ac_common_shared_wptr) = 0; - *((u32 *)shrm->ac_common_shared_rptr) = 0; - ape_shm_fifo_0.shared_wptr = 0; - ape_shm_fifo_0.shared_rptr = 0; - ape_shm_fifo_0.availablesize = shrm->ape_common_fifo_size; - ape_shm_fifo_0.end_addr_fifo = shrm->ape_common_fifo_size; - ape_shm_fifo_0.fifo_virtual_addr = shrm->ape_common_fifo_base; - spin_lock_init(&ape_shm_fifo_0.fifo_update_lock); - - - cmt_shm_fifo_0.reader_local_rptr = 0; - cmt_shm_fifo_0.reader_local_wptr = 0; - cmt_shm_fifo_0.shared_wptr = - *((u32 *)shrm->ca_common_shared_wptr); - cmt_shm_fifo_0.shared_rptr = - *((u32 *)shrm->ca_common_shared_rptr); - cmt_shm_fifo_0.availablesize = shrm->cmt_common_fifo_size; - cmt_shm_fifo_0.end_addr_fifo = shrm->cmt_common_fifo_size; - cmt_shm_fifo_0.fifo_virtual_addr = shrm->cmt_common_fifo_base; - - ape_shm_fifo_1.writer_local_wptr = 0; - ape_shm_fifo_1.writer_local_rptr = 0; - ape_shm_fifo_1.shared_wptr = 0; - ape_shm_fifo_1.shared_rptr = 0; - *((u32 *)shrm->ac_audio_shared_wptr) = 0; - *((u32 *)shrm->ac_audio_shared_rptr) = 0; - ape_shm_fifo_1.availablesize = shrm->ape_audio_fifo_size; - ape_shm_fifo_1.end_addr_fifo = shrm->ape_audio_fifo_size; - ape_shm_fifo_1.fifo_virtual_addr = shrm->ape_audio_fifo_base; - spin_lock_init(&ape_shm_fifo_1.fifo_update_lock); - - cmt_shm_fifo_1.reader_local_rptr = 0; - cmt_shm_fifo_1.reader_local_wptr = 0; - cmt_shm_fifo_1.shared_wptr = - *((u32 *)shrm->ca_audio_shared_wptr); - cmt_shm_fifo_1.shared_rptr = - *((u32 *)shrm->ca_audio_shared_rptr); - cmt_shm_fifo_1.availablesize = shrm->cmt_audio_fifo_size; - cmt_shm_fifo_1.end_addr_fifo = shrm->cmt_audio_fifo_size; - cmt_shm_fifo_1.fifo_virtual_addr = shrm->cmt_audio_fifo_base; - msg_audio_counter = 0; - msg_common_counter = 0; -} - -u8 read_boot_info_req(struct shrm_dev *shrm, - u32 *config, - u32 *version) -{ - struct fifo_read_params *fifo = &cmt_shm_fifo_0; - u32 *msg; - u32 header = 0; - u8 msgtype; - - /* Read L1 header read content of reader_local_rptr */ - msg = (u32 *) - (fifo->reader_local_rptr + fifo->fifo_virtual_addr); - header = *msg; - msgtype = (header & L1_MAPID_MASK) >> L1_MSG_MAPID_OFFSET; - if (msgtype != L1_BOOT_INFO_REQ) { - dev_err(shrm->dev, "Read_Boot_Info_Req Fatal ERROR\n"); - BUG(); - } - *config = (header >> CONFIG_OFFSET) & MASK_0_15_BIT; - *version = header & MASK_0_15_BIT; - fifo->reader_local_rptr += 1; - - return 1; -} - -void write_boot_info_resp(struct shrm_dev *shrm, u32 config, - u32 version) -{ - struct fifo_write_params *fifo = &ape_shm_fifo_0; - u32 *msg; - u8 msg_length; - version = SHRM_VER; - - spin_lock_bh(&fifo->fifo_update_lock); - /* Read L1 header read content of reader_local_rptr */ - msg = (u32 *) - (fifo->writer_local_wptr+fifo->fifo_virtual_addr); - if (version < 1) { - *msg = ((L1_BOOT_INFO_RESP << L1_MSG_MAPID_OFFSET) | - ((config << CONFIG_OFFSET) & MASK_16_31_BIT) - | (version & MASK_0_15_BIT)); - msg_length = 1; - } else { - *msg = ((L1_BOOT_INFO_RESP << L1_MSG_MAPID_OFFSET) | - ((0x8 << MSG_LEN_OFFSET) & MASK_16_27_BIT) | - ((config << CONFIG_OFFSET) & MASK_8_16_BIT)| - version); - msg++; - *msg = ca_ist_inactivity_timer; - msg++; - *msg = ca_csc_inactivity_timer; - msg_length = L1_NORMAL_MSG; - } - fifo->writer_local_wptr += msg_length; - fifo->availablesize -= msg_length; - spin_unlock_bh(&fifo->fifo_update_lock); -} - -/** - * shm_write_msg_to_fifo() - write message to FIFO - * @shrm: pointer to shrm device information structure - * @channel: audio or common channel - * @l2header: L2 header or device ID - * @addr: pointer to write buffer address - * @length: length of mst to write - * - * Function Which Writes the data into Fifo in IPC zone - * It is called from shm_write_msg. This function will copy the msg - * from the kernel buffer to FIFO. There are 4 kernel buffers from where - * the data is to copied to FIFO one for each of the messages ISI, RPC, - * AUDIO and SECURITY. ISI, RPC and SECURITY messages are pushed to FIFO - * in commmon channel and AUDIO message is pushed onto audio channel FIFO. - */ -int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, - u8 l2header, void *addr, u32 length) -{ - struct fifo_write_params *fifo = NULL; - u32 l1_header = 0, l2_header = 0; - u32 requiredsize; - u32 size = 0; - u32 *msg; - u8 *src; - - if (channel == COMMON_CHANNEL) - fifo = &ape_shm_fifo_0; - else if (channel == AUDIO_CHANNEL) - fifo = &ape_shm_fifo_1; - else { - dev_err(shrm->dev, "invalid channel\n"); - return -EINVAL; - } - - /* L2 size in 32b */ - requiredsize = ((length + 3) / 4); - /* Add size of L1 & L2 header */ - requiredsize += 2; - - /* if availablesize = or < requiredsize then error */ - if (fifo->availablesize <= requiredsize) { - /* Fatal ERROR - should never happens */ - dev_dbg(shrm->dev, "wr_wptr= %x\n", - fifo->writer_local_wptr); - dev_dbg(shrm->dev, "wr_rptr= %x\n", - fifo->writer_local_rptr); - dev_dbg(shrm->dev, "shared_wptr= %x\n", - fifo->shared_wptr); - dev_dbg(shrm->dev, "shared_rptr= %x\n", - fifo->shared_rptr); - dev_dbg(shrm->dev, "availsize= %x\n", - fifo->availablesize); - dev_dbg(shrm->dev, "end__fifo= %x\n", - fifo->end_addr_fifo); - dev_warn(shrm->dev, "Modem is busy, please wait." - " c_cnt = %d; a_cnt = %d\n", msg_common_counter, - msg_audio_counter); - if (channel == COMMON_CHANNEL) { - dev_warn(shrm->dev, - "Modem is lagging behind in reading." - "Stopping n/w dev queue\n"); - shrm_stop_netdev(shrm->ndev); - } - - return -EAGAIN; - } - - if (channel == COMMON_CHANNEL) { - /* build L1 header */ - l1_header = ((L1_NORMAL_MSG << L1_MSG_MAPID_OFFSET) | - (((msg_common_counter++) << COUNTER_OFFSET) - & MASK_40_55_BIT) | - ((length + L2_HEADER_SIZE) & MASK_0_39_BIT)); - } else if (channel == AUDIO_CHANNEL) { - /* build L1 header */ - l1_header = ((L1_NORMAL_MSG << L1_MSG_MAPID_OFFSET) | - (((msg_audio_counter++) << COUNTER_OFFSET) - & MASK_40_55_BIT) | - ((length + L2_HEADER_SIZE) & MASK_0_39_BIT)); - } - - /* - * Need to take care race condition for fifo->availablesize - * & fifo->writer_local_rptr with Ac_Read_notification interrupt. - * One option could be use stack variable for LocalRptr and recompute - * fifo->availablesize,based on flag enabled in the - * Ac_read_notification - */ - l2_header = ((l2header << L2_HEADER_OFFSET) | - ((length) & MASK_0_39_BIT)); - spin_lock_bh(&fifo->fifo_update_lock); - /* Check Local Rptr is less than or equal to Local WPtr */ - if (fifo->writer_local_rptr <= fifo->writer_local_wptr) { - msg = (u32 *) - (fifo->fifo_virtual_addr+fifo->writer_local_wptr); - - /* check enough place bewteen writer_local_wptr & end of FIFO */ - if ((fifo->end_addr_fifo-fifo->writer_local_wptr) >= - requiredsize) { - /* Add L1 header and L2 header */ - *msg = l1_header; - msg++; - *msg = l2_header; - msg++; - - /* copy the l2 message in 1 memcpy */ - memcpy((void *)msg, addr, length); - /* UpdateWptr */ - fifo->writer_local_wptr += requiredsize; - fifo->availablesize -= requiredsize; - fifo->writer_local_wptr %= fifo->end_addr_fifo; - } else { - /* - * message is split between and of FIFO and beg of FIFO - * copy first part from writer_local_wptr to end of FIFO - */ - size = fifo->end_addr_fifo-fifo->writer_local_wptr; - - if (size == 1) { - /* Add L1 header */ - *msg = l1_header; - msg++; - /* UpdateWptr */ - fifo->writer_local_wptr = 0; - fifo->availablesize -= size; - /* - * copy second part from beg of FIFO - * with remaining part of msg - */ - msg = (u32 *) - fifo->fifo_virtual_addr; - *msg = l2_header; - msg++; - - /* copy the l3 message in 1 memcpy */ - memcpy((void *)msg, addr, length); - /* UpdateWptr */ - fifo->writer_local_wptr += - requiredsize-size; - fifo->availablesize -= - (requiredsize-size); - } else if (size == 2) { - /* Add L1 header and L2 header */ - *msg = l1_header; - msg++; - *msg = l2_header; - msg++; - - /* UpdateWptr */ - fifo->writer_local_wptr = 0; - fifo->availablesize -= size; - - /* - * copy second part from beg of FIFO - * with remaining part of msg - */ - msg = (u32 *) - fifo->fifo_virtual_addr; - /* copy the l3 message in 1 memcpy */ - memcpy((void *)msg, addr, length); - - /* UpdateWptr */ - fifo->writer_local_wptr += - requiredsize-size; - fifo->availablesize -= - (requiredsize-size); - } else { - /* Add L1 header and L2 header */ - *msg = l1_header; - msg++; - *msg = l2_header; - msg++; - - /* copy the l2 message in 1 memcpy */ - memcpy((void *)msg, addr, (size-2)*4); - - - /* UpdateWptr */ - fifo->writer_local_wptr = 0; - fifo->availablesize -= size; - - /* - * copy second part from beg of FIFO - * with remaining part of msg - */ - msg = (u32 *)fifo->fifo_virtual_addr; - src = (u8 *)addr+((size - 2) * 4); - memcpy((void *)msg, src, - (length-((size - 2) * 4))); - - /* UpdateWptr */ - fifo->writer_local_wptr += - requiredsize-size; - fifo->availablesize -= - (requiredsize-size); - } - - } - } else { - /* writer_local_rptr > writer_local_wptr */ - msg = (u32 *) - (fifo->fifo_virtual_addr+fifo->writer_local_wptr); - /* Add L1 header and L2 header */ - *msg = l1_header; - msg++; - *msg = l2_header; - msg++; - /* - * copy message possbile between writer_local_wptr up - * to writer_local_rptr copy the l3 message in 1 memcpy - */ - memcpy((void *)msg, addr, length); - - /* UpdateWptr */ - fifo->writer_local_wptr += requiredsize; - fifo->availablesize -= requiredsize; - - } - spin_unlock_bh(&fifo->fifo_update_lock); - return length; -} - -/** - * read_one_l2msg_common() - read message from common channel - * @shrm: pointer to shrm device information structure - * @l2_msg: pointer to the read L2 message buffer - * @len: message length - * - * This function read one message from the FIFO and returns l2 header type - */ -u8 read_one_l2msg_common(struct shrm_dev *shrm, - u8 *l2_msg, u32 *len) -{ - struct fifo_read_params *fifo = &cmt_shm_fifo_0; - - u32 *msg; - u32 l1_header = 0; - u32 l2_header = 0; - u32 length; - u8 msgtype; - u32 msg_size; - u32 size = 0; - - /* Read L1 header read content of reader_local_rptr */ - msg = (u32 *) - (fifo->reader_local_rptr+fifo->fifo_virtual_addr); - l1_header = *msg++; - msgtype = (l1_header & 0xF0000000) >> L1_HEADER_MASK; - - if (msgtype != L1_NORMAL_MSG) { - /* Fatal ERROR - should never happens */ - dev_dbg(shrm->dev, "wr_wptr= %x\n", - fifo->reader_local_wptr); - dev_dbg(shrm->dev, "wr_rptr= %x\n", - fifo->reader_local_rptr); - dev_dbg(shrm->dev, "shared_wptr= %x\n", - fifo->shared_wptr); - dev_dbg(shrm->dev, "shared_rptr= %x\n", - fifo->shared_rptr); - dev_dbg(shrm->dev, "availsize= %x\n", - fifo->availablesize); - dev_dbg(shrm->dev, "end_fifo= %x\n", - fifo->end_addr_fifo); - /* Fatal ERROR - should never happens */ - dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); - BUG(); - } - if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { - l2_header = (*((u32 *)fifo->fifo_virtual_addr)); - length = l2_header & MASK_0_39_BIT; - } else { - /* Read L2 header,Msg size & content of reader_local_rptr */ - l2_header = *msg; - length = l2_header & MASK_0_39_BIT; - } - - *len = length; - msg_size = ((length + 3) / 4); - msg_size += 2; - - if (fifo->reader_local_rptr + msg_size <= - fifo->end_addr_fifo) { - /* Skip L2 header */ - msg++; - - /* read msg between reader_local_rptr and end of FIFO */ - memcpy((void *)l2_msg, (void *)msg, length); - /* UpdateLocalRptr */ - fifo->reader_local_rptr += msg_size; - fifo->reader_local_rptr %= fifo->end_addr_fifo; - } else { - /* - * msg split between end of FIFO and beg copy first - * part of msg read msg between reader_local_rptr - * and end of FIFO - */ - size = fifo->end_addr_fifo-fifo->reader_local_rptr; - if (size == 1) { - msg = (u32 *)(fifo->fifo_virtual_addr); - /* Skip L2 header */ - msg++; - memcpy((void *)l2_msg, (void *)(msg), length); - } else if (size == 2) { - /* Skip L2 header */ - msg++; - msg = (u32 *)(fifo->fifo_virtual_addr); - memcpy((void *)l2_msg, - (void *)(msg), length); - } else { - /* Skip L2 header */ - msg++; - memcpy((void *)l2_msg, (void *)msg, ((size - 2) * 4)); - /* copy second part of msg */ - l2_msg += ((size - 2) * 4); - msg = (u32 *)(fifo->fifo_virtual_addr); - memcpy((void *)l2_msg, (void *)(msg), - (length-((size - 2) * 4))); - } - fifo->reader_local_rptr = - (fifo->reader_local_rptr+msg_size) % - fifo->end_addr_fifo; - } - return (l2_header>>L2_HEADER_OFFSET) & MASK_0_15_BIT; - } - -u8 read_remaining_messages_common() -{ - struct fifo_read_params *fifo = &cmt_shm_fifo_0; - /* - * There won't be any Race condition reader_local_rptr & - * fifo->reader_local_wptr with CaMsgpending Notification Interrupt - */ - return ((fifo->reader_local_rptr != fifo->reader_local_wptr) ? 1 : 0); -} - -u8 read_one_l2msg_audio(struct shrm_dev *shrm, - u8 *l2_msg, u32 *len) -{ - struct fifo_read_params *fifo = &cmt_shm_fifo_1; - - u32 *msg; - u32 l1_header = 0; - u32 l2_header = 0; - u32 length; - u8 msgtype; - u32 msg_size; - u32 size = 0; - - /* Read L1 header read content of reader_local_rptr */ - msg = (u32 *) - (fifo->reader_local_rptr+fifo->fifo_virtual_addr); - l1_header = *msg++; - msgtype = (l1_header & 0xF0000000) >> L1_HEADER_MASK; - - if (msgtype != L1_NORMAL_MSG) { - /* Fatal ERROR - should never happens */ - dev_dbg(shrm->dev, "wr_local_wptr= %x\n", - fifo->reader_local_wptr); - dev_dbg(shrm->dev, "wr_local_rptr= %x\n", - fifo->reader_local_rptr); - dev_dbg(shrm->dev, "shared_wptr= %x\n", - fifo->shared_wptr); - dev_dbg(shrm->dev, "shared_rptr= %x\n", - fifo->shared_rptr); - dev_dbg(shrm->dev, "availsize=%x\n", - fifo->availablesize); - dev_dbg(shrm->dev, "end_fifo= %x\n", - fifo->end_addr_fifo); - /* Fatal ERROR - should never happens */ - dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); - BUG(); - } - if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { - l2_header = (*((u32 *)fifo->fifo_virtual_addr)); - length = l2_header & MASK_0_39_BIT; - } else { - /* Read L2 header,Msg size & content of reader_local_rptr */ - l2_header = *msg; - length = l2_header & MASK_0_39_BIT; - } - - *len = length; - msg_size = ((length + 3) / 4); - msg_size += 2; - - if (fifo->reader_local_rptr + msg_size <= - fifo->end_addr_fifo) { - /* Skip L2 header */ - msg++; - /* read msg between reader_local_rptr and end of FIFO */ - memcpy((void *)l2_msg, (void *)msg, length); - /* UpdateLocalRptr */ - fifo->reader_local_rptr += msg_size; - fifo->reader_local_rptr %= fifo->end_addr_fifo; - } else { - - /* - * msg split between end of FIFO and beg - * copy first part of msg - * read msg between reader_local_rptr and end of FIFO - */ - size = fifo->end_addr_fifo-fifo->reader_local_rptr; - if (size == 1) { - msg = (u32 *)(fifo->fifo_virtual_addr); - /* Skip L2 header */ - msg++; - memcpy((void *)l2_msg, (void *)(msg), length); - } else if (size == 2) { - /* Skip L2 header */ - msg++; - msg = (u32 *)(fifo->fifo_virtual_addr); - memcpy((void *)l2_msg, (void *)(msg), length); - } else { - /* Skip L2 header */ - msg++; - memcpy((void *)l2_msg, (void *)msg, ((size - 2) * 4)); - /* copy second part of msg */ - l2_msg += ((size - 2) * 4); - msg = (u32 *)(fifo->fifo_virtual_addr); - memcpy((void *)l2_msg, (void *)(msg), - (length-((size - 2) * 4))); - } - fifo->reader_local_rptr = - (fifo->reader_local_rptr+msg_size) % - fifo->end_addr_fifo; - - } - return (l2_header>>L2_HEADER_OFFSET) & MASK_0_15_BIT; - } - -u8 read_remaining_messages_audio() -{ - struct fifo_read_params *fifo = &cmt_shm_fifo_1; - - return ((fifo->reader_local_rptr != fifo->reader_local_wptr) ? - 1 : 0); -} - -u8 is_the_only_one_unread_message(struct shrm_dev *shrm, - u8 channel, u32 length) -{ - struct fifo_write_params *fifo = NULL; - u32 messagesize = 0; - u8 is_only_one_unread_msg = 0; - - if (channel == COMMON_CHANNEL) - fifo = &ape_shm_fifo_0; - else /* channel = AUDIO_CHANNEL */ - fifo = &ape_shm_fifo_1; - - /* L3 size in 32b */ - messagesize = ((length + 3) / 4); - /* Add size of L1 & L2 header */ - messagesize += 2; - /* - * possibility of race condition with Ac Read notification interrupt. - * need to check ? - */ - if (fifo->writer_local_wptr > fifo->writer_local_rptr) - is_only_one_unread_msg = - ((fifo->writer_local_rptr + messagesize) == - fifo->writer_local_wptr) ? 1 : 0; - else - /* Msg split between end of fifo and starting of Fifo */ - is_only_one_unread_msg = - (((fifo->writer_local_rptr + messagesize) % - fifo->end_addr_fifo) == fifo->writer_local_wptr) ? - 1 : 0; - - return is_only_one_unread_msg; -} - -void update_ca_common_local_wptr(struct shrm_dev *shrm) -{ - /* - * update CA common reader local write pointer with the - * shared write pointer - */ - struct fifo_read_params *fifo = &cmt_shm_fifo_0; - - fifo->shared_wptr = - (*((u32 *)shrm->ca_common_shared_wptr)); - fifo->reader_local_wptr = fifo->shared_wptr; -} - -void update_ca_audio_local_wptr(struct shrm_dev *shrm) -{ - /* - * update CA audio reader local write pointer with the - * shared write pointer - */ - struct fifo_read_params *fifo = &cmt_shm_fifo_1; - - fifo->shared_wptr = - (*((u32 *)shrm->ca_audio_shared_wptr)); - fifo->reader_local_wptr = fifo->shared_wptr; -} - -void update_ac_common_local_rptr(struct shrm_dev *shrm) -{ - /* - * update AC common writer local read pointer with the - * shared read pointer - */ - struct fifo_write_params *fifo; - u32 free_space = 0; - - fifo = &ape_shm_fifo_0; - - spin_lock_bh(&fifo->fifo_update_lock); - fifo->shared_rptr = - (*((u32 *)shrm->ac_common_shared_rptr)); - - if (fifo->shared_rptr >= fifo->writer_local_rptr) - free_space = - (fifo->shared_rptr-fifo->writer_local_rptr); - else { - free_space = - (fifo->end_addr_fifo-fifo->writer_local_rptr); - free_space += fifo->shared_rptr; - } - - /* Chance of race condition of below variables with write_msg */ - fifo->availablesize += free_space; - fifo->writer_local_rptr = fifo->shared_rptr; - spin_unlock_bh(&fifo->fifo_update_lock); -} - -void update_ac_audio_local_rptr(struct shrm_dev *shrm) -{ - /* - * update AC audio writer local read pointer with the - * shared read pointer - */ - struct fifo_write_params *fifo; - u32 free_space = 0; - - fifo = &ape_shm_fifo_1; - spin_lock_bh(&fifo->fifo_update_lock); - fifo->shared_rptr = - (*((u32 *)shrm->ac_audio_shared_rptr)); - - if (fifo->shared_rptr >= fifo->writer_local_rptr) - free_space = - (fifo->shared_rptr-fifo->writer_local_rptr); - else { - free_space = - (fifo->end_addr_fifo-fifo->writer_local_rptr); - free_space += fifo->shared_rptr; - } - - /* Chance of race condition of below variables with write_msg */ - fifo->availablesize += free_space; - fifo->writer_local_rptr = fifo->shared_rptr; - spin_unlock_bh(&fifo->fifo_update_lock); -} - -void update_ac_common_shared_wptr(struct shrm_dev *shrm) -{ - /* - * update AC common shared write pointer with the - * local write pointer - */ - struct fifo_write_params *fifo; - - fifo = &ape_shm_fifo_0; - spin_lock_bh(&fifo->fifo_update_lock); - /* Update shared pointer fifo offset of the IPC zone */ - (*((u32 *)shrm->ac_common_shared_wptr)) = - fifo->writer_local_wptr; - - fifo->shared_wptr = fifo->writer_local_wptr; - spin_unlock_bh(&fifo->fifo_update_lock); -} - -void update_ac_audio_shared_wptr(struct shrm_dev *shrm) -{ - /* - * update AC audio shared write pointer with the - * local write pointer - */ - struct fifo_write_params *fifo; - - fifo = &ape_shm_fifo_1; - spin_lock_bh(&fifo->fifo_update_lock); - /* Update shared pointer fifo offset of the IPC zone */ - (*((u32 *)shrm->ac_audio_shared_wptr)) = - fifo->writer_local_wptr; - fifo->shared_wptr = fifo->writer_local_wptr; - spin_unlock_bh(&fifo->fifo_update_lock); -} - -void update_ca_common_shared_rptr(struct shrm_dev *shrm) -{ - /* - * update CA common shared read pointer with the - * local read pointer - */ - struct fifo_read_params *fifo; - - fifo = &cmt_shm_fifo_0; - - /* Update shared pointer fifo offset of the IPC zone */ - (*((u32 *)shrm->ca_common_shared_rptr)) = - fifo->reader_local_rptr; - fifo->shared_rptr = fifo->reader_local_rptr; -} - -void update_ca_audio_shared_rptr(struct shrm_dev *shrm) -{ - /* - * update CA audio shared read pointer with the - * local read pointer - */ - struct fifo_read_params *fifo; - - fifo = &cmt_shm_fifo_1; - - /* Update shared pointer fifo offset of the IPC zone */ - (*((u32 *)shrm->ca_audio_shared_rptr)) = - fifo->reader_local_rptr; - fifo->shared_rptr = fifo->reader_local_rptr; -} - -void get_reader_pointers(u8 channel_type, u32 *reader_local_rptr, - u32 *reader_local_wptr, u32 *shared_rptr) -{ - struct fifo_read_params *fifo = NULL; - - if (channel_type == COMMON_CHANNEL) - fifo = &cmt_shm_fifo_0; - else /* channel_type = AUDIO_CHANNEL */ - fifo = &cmt_shm_fifo_1; - - *reader_local_rptr = fifo->reader_local_rptr; - *reader_local_wptr = fifo->reader_local_wptr; - *shared_rptr = fifo->shared_rptr; -} - -void get_writer_pointers(u8 channel_type, u32 *writer_local_rptr, - u32 *writer_local_wptr, u32 *shared_wptr) -{ - struct fifo_write_params *fifo = NULL; - - if (channel_type == COMMON_CHANNEL) - fifo = &ape_shm_fifo_0; - else /* channel_type = AUDIO_CHANNEL */ - fifo = &ape_shm_fifo_1; - - spin_lock_bh(&fifo->fifo_update_lock); - *writer_local_rptr = fifo->writer_local_rptr; - *writer_local_wptr = fifo->writer_local_wptr; - *shared_wptr = fifo->shared_wptr; - spin_unlock_bh(&fifo->fifo_update_lock); -} - -void set_ca_msg_0_read_notif_send(u8 val) -{ - cmt_read_notif_0_send = val; -} - -u8 get_ca_msg_0_read_notif_send(void) -{ - return cmt_read_notif_0_send; -} - -void set_ca_msg_1_read_notif_send(u8 val) -{ - cmt_read_notif_1_send = val; -} - -u8 get_ca_msg_1_read_notif_send(void) -{ - return cmt_read_notif_1_send; -} diff --git a/drivers/misc/shrm/shrm_protocol.c b/drivers/misc/shrm/shrm_protocol.c deleted file mode 100644 index 686bebcb451..00000000000 --- a/drivers/misc/shrm/shrm_protocol.c +++ /dev/null @@ -1,1191 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Biju Das for ST-Ericsson - * Author: Kumar Sanghvi for ST-Ericsson - * Author: Arun Murthy for ST-Ericsson - * License terms: GNU General Public License (GPL) version 2 - */ - -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define L2_HEADER_ISI 0x0 -#define L2_HEADER_RPC 0x1 -#define L2_HEADER_AUDIO 0x2 -#define L2_HEADER_SECURITY 0x3 -#define L2_HEADER_COMMON_SIMPLE_LOOPBACK 0xC0 -#define L2_HEADER_COMMON_ADVANCED_LOOPBACK 0xC1 -#define L2_HEADER_AUDIO_SIMPLE_LOOPBACK 0x80 -#define L2_HEADER_AUDIO_ADVANCED_LOOPBACK 0x81 -#define MAX_PAYLOAD 1024 - -static u8 boot_state = BOOT_INIT; -static u8 recieve_common_msg[8*1024]; -static u8 recieve_audio_msg[8*1024]; -static received_msg_handler rx_common_handler; -static received_msg_handler rx_audio_handler; -static struct hrtimer timer; -struct sock *shrm_nl_sk; - -static char shrm_common_tx_state = SHRM_SLEEP_STATE; -static char shrm_common_rx_state = SHRM_SLEEP_STATE; -static char shrm_audio_tx_state = SHRM_SLEEP_STATE; -static char shrm_audio_rx_state = SHRM_SLEEP_STATE; - -static atomic_t ac_sleep_disable_count = ATOMIC_INIT(0); -static struct shrm_dev *shm_dev; - -/* Spin lock and tasklet declaration */ -DECLARE_TASKLET(shm_ca_0_tasklet, shm_ca_msgpending_0_tasklet, 0); -DECLARE_TASKLET(shm_ca_1_tasklet, shm_ca_msgpending_1_tasklet, 0); -DECLARE_TASKLET(shm_ac_read_0_tasklet, shm_ac_read_notif_0_tasklet, 0); -DECLARE_TASKLET(shm_ac_read_1_tasklet, shm_ac_read_notif_1_tasklet, 0); - -static DEFINE_MUTEX(ac_state_mutex); - -static DEFINE_SPINLOCK(ca_common_lock); -static DEFINE_SPINLOCK(ca_audio_lock); -static DEFINE_SPINLOCK(ca_wake_req_lock); -static DEFINE_SPINLOCK(boot_lock); - -enum shrm_nl { - SHRM_NL_MOD_RESET = 1, - SHRM_NL_MOD_QUERY_STATE, - SHRM_NL_USER_MOD_RESET, - SHRM_NL_STATUS_MOD_ONLINE, - SHRM_NL_STATUS_MOD_OFFLINE, -}; - -static void shm_ac_sleep_req_work(struct work_struct *work) -{ - mutex_lock(&ac_state_mutex); - if (atomic_read(&ac_sleep_disable_count) == 0) - modem_release(shm_dev->modem); - mutex_unlock(&ac_state_mutex); -} - -static void shm_ac_wake_req_work(struct work_struct *work) -{ - mutex_lock(&ac_state_mutex); - modem_request(shm_dev->modem); - mutex_unlock(&ac_state_mutex); -} - -static u32 get_host_accessport_val(void) -{ - u32 prcm_hostaccess; - - prcm_hostaccess = readl(PRCM_HOSTACCESS_REQ); - wmb(); - prcm_hostaccess = prcm_hostaccess & 0x01; - - return prcm_hostaccess; -} -static enum hrtimer_restart callback(struct hrtimer *timer) -{ - unsigned long flags; - - spin_lock_irqsave(&ca_wake_req_lock, flags); - if (((shrm_common_rx_state == SHRM_IDLE) || - (shrm_common_rx_state == SHRM_SLEEP_STATE)) - && ((shrm_common_tx_state == SHRM_IDLE) || - (shrm_common_tx_state == SHRM_SLEEP_STATE)) - && ((shrm_audio_rx_state == SHRM_IDLE) || - (shrm_audio_rx_state == SHRM_SLEEP_STATE)) - && ((shrm_audio_tx_state == SHRM_IDLE) || - (shrm_audio_tx_state == SHRM_SLEEP_STATE))) { - - shrm_common_rx_state = SHRM_SLEEP_STATE; - shrm_audio_rx_state = SHRM_SLEEP_STATE; - shrm_common_tx_state = SHRM_SLEEP_STATE; - shrm_audio_tx_state = SHRM_SLEEP_STATE; - - queue_work(shm_dev->shm_ac_sleep_wq, - &shm_dev->shm_ac_sleep_req); - - } - spin_unlock_irqrestore(&ca_wake_req_lock, flags); - - return HRTIMER_NORESTART; -} - -int nl_send_multicast_message(int msg, gfp_t gfp_mask) -{ - struct sk_buff *skb = NULL; - struct nlmsghdr *nlh = NULL; - int err; - - /* prepare netlink message */ - skb = alloc_skb(NLMSG_SPACE(MAX_PAYLOAD), gfp_mask); - if (!skb) { - dev_err(shm_dev->dev, "%s:alloc_skb failed\n", __func__); - err = -ENOMEM; - goto out; - } - - nlh = (struct nlmsghdr *)skb->data; - nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD); - dev_dbg(shm_dev->dev, "nlh->nlmsg_len = %d\n", nlh->nlmsg_len); - - nlh->nlmsg_pid = 0; /* from kernel */ - nlh->nlmsg_flags = 0; - *(int *)NLMSG_DATA(nlh) = msg; - skb_put(skb, MAX_PAYLOAD); - /* sender is in group 1<<0 */ - NETLINK_CB(skb).pid = 0; /* from kernel */ - /* to mcast group 1<<0 */ - NETLINK_CB(skb).dst_group = 1; - - /*multicast the message to all listening processes*/ - err = netlink_broadcast(shrm_nl_sk, skb, 0, 1, gfp_mask); - dev_dbg(shm_dev->dev, "ret val from nl-multicast = %d\n", err); - -out: - return err; -} - -static void nl_send_unicast_message(int dst_pid) -{ - struct sk_buff *skb = NULL; - struct nlmsghdr *nlh = NULL; - int err; - int bt_state; - unsigned long flags; - - dev_info(shm_dev->dev, "Sending unicast message\n"); - - /* prepare the NL message for unicast */ - skb = alloc_skb(NLMSG_SPACE(MAX_PAYLOAD), GFP_KERNEL); - if (!skb) { - dev_err(shm_dev->dev, "%s:alloc_skb failed\n", __func__); - return; - } - - nlh = (struct nlmsghdr *)skb->data; - nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD); - dev_dbg(shm_dev->dev, "nlh->nlmsg_len = %d\n", nlh->nlmsg_len); - - nlh->nlmsg_pid = 0; /* from kernel */ - nlh->nlmsg_flags = 0; - - spin_lock_irqsave(&boot_lock, flags); - bt_state = boot_state; - spin_unlock_irqrestore(&boot_lock, flags); - - if (bt_state == BOOT_DONE) - *(int *)NLMSG_DATA(nlh) = SHRM_NL_STATUS_MOD_ONLINE; - else - *(int *)NLMSG_DATA(nlh) = SHRM_NL_STATUS_MOD_OFFLINE; - - skb_put(skb, MAX_PAYLOAD); - /* sender is in group 1<<0 */ - NETLINK_CB(skb).pid = 0; /* from kernel */ - NETLINK_CB(skb).dst_group = 0; - - /*unicast the message to the querying processes*/ - err = netlink_unicast(shrm_nl_sk, skb, dst_pid, MSG_DONTWAIT); - dev_dbg(shm_dev->dev, "ret val from nl-unicast = %d\n", err); -} - - -static int check_modem_in_reset(void) -{ - u8 bt_state; - unsigned long flags; - - spin_lock_irqsave(&boot_lock, flags); - bt_state = boot_state; - spin_unlock_irqrestore(&boot_lock, flags); - -#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET - if (bt_state != BOOT_UNKNOWN) - return 0; - else - return -ENODEV; -#else - /* - * this check won't be applicable and won't work correctly - * if modem-silent-feature is not enabled - * so, simply return 0 - */ - return 0; -#endif -} - -void shm_ca_msgpending_0_tasklet(unsigned long tasklet_data) -{ - struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; - u32 reader_local_rptr; - u32 reader_local_wptr; - u32 shared_rptr; - u32 config = 0, version = 0; - unsigned long flags; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - /* Interprocess locking */ - spin_lock(&ca_common_lock); - - /* Update_reader_local_wptr with shared_wptr */ - update_ca_common_local_wptr(shrm); - get_reader_pointers(COMMON_CHANNEL, &reader_local_rptr, - &reader_local_wptr, &shared_rptr); - - set_ca_msg_0_read_notif_send(0); - - if (boot_state == BOOT_DONE) { - shrm_common_rx_state = SHRM_PTR_FREE; - - if (reader_local_rptr != shared_rptr) - ca_msg_read_notification_0(shrm); - if (reader_local_rptr != reader_local_wptr) - receive_messages_common(shrm); - get_reader_pointers(COMMON_CHANNEL, &reader_local_rptr, - &reader_local_wptr, &shared_rptr); - if (reader_local_rptr == reader_local_wptr) - shrm_common_rx_state = SHRM_IDLE; - } else { - /* BOOT phase.only a BOOT_RESP should be in FIFO */ - if (boot_state != BOOT_INFO_SYNC) { - if (!read_boot_info_req(shrm, &config, &version)) { - dev_err(shrm->dev, - "Unable to read boot state\n"); - BUG(); - } - /* SendReadNotification */ - ca_msg_read_notification_0(shrm); - /* - * Check the version number before - * sending Boot info response - */ - - /* send MsgPending notification */ - write_boot_info_resp(shrm, config, version); - spin_lock_irqsave(&boot_lock, flags); - boot_state = BOOT_INFO_SYNC; - spin_unlock_irqrestore(&boot_lock, flags); - dev_info(shrm->dev, "BOOT_INFO_SYNC\n"); - queue_work(shrm->shm_common_ch_wr_wq, - &shrm->send_ac_msg_pend_notify_0); - } else { - ca_msg_read_notification_0(shrm); - dev_info(shrm->dev, - "BOOT_INFO_SYNC\n"); - } - } - /* Interprocess locking */ - spin_unlock(&ca_common_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -void shm_ca_msgpending_1_tasklet(unsigned long tasklet_data) -{ - struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; - u32 reader_local_rptr; - u32 reader_local_wptr; - u32 shared_rptr; - - /* - * This function is called when CaMsgPendingNotification Trigerred - * by CMU. It means that CMU has wrote a message into Ca Audio FIFO - */ - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown\n", - __func__); - return; - } - - /* Interprocess locking */ - spin_lock(&ca_audio_lock); - - /* Update_reader_local_wptr(with shared_wptr) */ - update_ca_audio_local_wptr(shrm); - get_reader_pointers(AUDIO_CHANNEL, &reader_local_rptr, - &reader_local_wptr, &shared_rptr); - - set_ca_msg_1_read_notif_send(0); - - if (boot_state != BOOT_DONE) { - dev_err(shrm->dev, "Boot Error\n"); - return; - } - shrm_audio_rx_state = SHRM_PTR_FREE; - /* Check we already read the message */ - if (reader_local_rptr != shared_rptr) - ca_msg_read_notification_1(shrm); - if (reader_local_rptr != reader_local_wptr) - receive_messages_audio(shrm); - - get_reader_pointers(AUDIO_CHANNEL, &reader_local_rptr, - &reader_local_wptr, &shared_rptr); - if (reader_local_rptr == reader_local_wptr) - shrm_audio_rx_state = SHRM_IDLE; - - /* Interprocess locking */ - spin_unlock(&ca_audio_lock); - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -void shm_ac_read_notif_0_tasklet(unsigned long tasklet_data) -{ - struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; - u32 writer_local_rptr; - u32 writer_local_wptr; - u32 shared_wptr; - unsigned long flags; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - /* Update writer_local_rptrwith shared_rptr */ - update_ac_common_local_rptr(shrm); - get_writer_pointers(COMMON_CHANNEL, &writer_local_rptr, - &writer_local_wptr, &shared_wptr); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown\n", - __func__); - return; - } - - if (boot_state == BOOT_INFO_SYNC) { - /* BOOT_RESP sent by APE has been received by CMT */ - spin_lock_irqsave(&boot_lock, flags); - boot_state = BOOT_DONE; - spin_unlock_irqrestore(&boot_lock, flags); - dev_info(shrm->dev, "IPC_ISA BOOT_DONE\n"); - - if (shrm->msr_flag) { - shrm_start_netdev(shrm->ndev); - shrm->msr_flag = 0; - - /* multicast that modem is online */ - nl_send_multicast_message(SHRM_NL_STATUS_MOD_ONLINE, GFP_ATOMIC); - } - - } else if (boot_state == BOOT_DONE) { - if (writer_local_rptr != writer_local_wptr) { - shrm_common_tx_state = SHRM_PTR_FREE; - queue_work(shrm->shm_common_ch_wr_wq, - &shrm->send_ac_msg_pend_notify_0); - } else { - shrm_common_tx_state = SHRM_IDLE; - shrm_restart_netdev(shrm->ndev); - } - } else { - dev_err(shrm->dev, "Invalid boot state\n"); - } - /* start timer here */ - hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), - HRTIMER_MODE_REL); - atomic_dec(&ac_sleep_disable_count); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -void shm_ac_read_notif_1_tasklet(unsigned long tasklet_data) -{ - struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; - u32 writer_local_rptr; - u32 writer_local_wptr; - u32 shared_wptr; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown\n", - __func__); - return; - } - - /* Update writer_local_rptr(with shared_rptr) */ - update_ac_audio_local_rptr(shrm); - get_writer_pointers(AUDIO_CHANNEL, &writer_local_rptr, - &writer_local_wptr, &shared_wptr); - if (boot_state != BOOT_DONE) { - dev_err(shrm->dev, "Error Case in boot state\n"); - return; - } - if (writer_local_rptr != writer_local_wptr) { - shrm_audio_tx_state = SHRM_PTR_FREE; - queue_work(shrm->shm_audio_ch_wr_wq, - &shrm->send_ac_msg_pend_notify_1); - } else { - shrm_audio_tx_state = SHRM_IDLE; - } - /* start timer here */ - hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), - HRTIMER_MODE_REL); - atomic_dec(&ac_sleep_disable_count); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -void shm_ca_sleep_req_work(struct work_struct *work) -{ - dev_dbg(shm_dev->dev, "%s:IRQ_PRCMU_CA_SLEEP\n", __func__); - - shrm_common_rx_state = SHRM_IDLE; - shrm_audio_rx_state = SHRM_IDLE; - - writel((1<intr_base + GOP_SET_REGISTER_BASE); - - hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), - HRTIMER_MODE_REL); -#ifdef CONFIG_UX500_SUSPEND - suspend_unblock_sleep(); -#endif - atomic_dec(&ac_sleep_disable_count); -} - -void shm_ca_wake_req_work(struct work_struct *work) -{ - struct shrm_dev *shrm = container_of(work, - struct shrm_dev, shm_ca_wake_req); - - /* initialize the FIFO Variables */ - if (boot_state == BOOT_INIT) - shm_fifo_init(shrm); - - mutex_lock(&ac_state_mutex); - modem_request(shrm->modem); - mutex_unlock(&ac_state_mutex); - - /* send ca_wake_ack_interrupt to CMU */ - if (!get_host_accessport_val()) - BUG(); - writel((1<intr_base + GOP_SET_REGISTER_BASE); -} -#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET -static int shrm_modem_reset_sequence(void) -{ - int err; - unsigned long flags; - - /* - * disable irqs - * very much needed for user-space initiated - * modem-reset - */ - disable_irq_nosync(shm_dev->ac_read_notif_0_irq); - disable_irq_nosync(shm_dev->ac_read_notif_1_irq); - disable_irq_nosync(shm_dev->ca_msg_pending_notif_0_irq); - disable_irq_nosync(shm_dev->ca_msg_pending_notif_1_irq); - disable_irq_nosync(IRQ_PRCMU_CA_WAKE); - disable_irq_nosync(IRQ_PRCMU_CA_SLEEP); - - - /* update the boot_state */ - spin_lock_irqsave(&boot_lock, flags); - boot_state = BOOT_UNKNOWN; - - /* - * put a barrier over here to make sure boot_state is updated - * else, it is seen that some of already executing modem - * irqs or tasklets fail the protocol checks and will ultimately - * try to acces the modem causing system to hang. - * This is particularly seen with user-space initiated modem reset - */ - wmb(); - spin_unlock_irqrestore(&boot_lock, flags); - - hrtimer_cancel(&timer); - - /* - * keep the count to 0 so that we can bring down the line - * for normal ac-wake and ac-sleep logic - */ - atomic_set(&ac_sleep_disable_count, 0); - - /* workaround for MSR */ - queue_work(shm_dev->shm_ac_wake_wq, - &shm_dev->shm_ac_wake_req); - - /* stop network queue */ - shrm_stop_netdev(shm_dev->ndev); - - /* reset char device queues */ - shrm_char_reset_queues(shm_dev); - - /* reset protocol states */ - shrm_common_tx_state = SHRM_SLEEP_STATE; - shrm_common_rx_state = SHRM_SLEEP_STATE; - shrm_audio_tx_state = SHRM_SLEEP_STATE; - shrm_audio_rx_state = SHRM_SLEEP_STATE; - - /* set the msr flag */ - shm_dev->msr_flag = 1; - - /* multicast that modem is going to reset */ - err = nl_send_multicast_message(SHRM_NL_MOD_RESET, GFP_ATOMIC); - - /* reset the boot state */ - spin_lock_irqsave(&boot_lock, flags); - boot_state = BOOT_INIT; - spin_unlock_irqrestore(&boot_lock, flags); - - /* re-enable irqs */ - enable_irq(shm_dev->ac_read_notif_0_irq); - enable_irq(shm_dev->ac_read_notif_1_irq); - enable_irq(shm_dev->ca_msg_pending_notif_0_irq); - enable_irq(shm_dev->ca_msg_pending_notif_1_irq); - enable_irq(IRQ_PRCMU_CA_WAKE); - enable_irq(IRQ_PRCMU_CA_SLEEP); - - return err; -} -#endif - -static void shrm_modem_reset_callback(unsigned long irq) -{ - dev_err(shm_dev->dev, "Received mod_reset_req interrupt\n"); - -#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET - { - int err; - dev_info(shm_dev->dev, "Initiating Modem silent reset\n"); - - err = shrm_modem_reset_sequence(); - if (err) - dev_err(shm_dev->dev, - "Failed multicast of modem reset\n"); - } -#else - dev_info(shm_dev->dev, "Modem in reset loop, doing System reset\n"); - - /* Call the PRCMU reset API */ - prcmu_system_reset(SW_RESET_NO_ARGUMENT); -#endif -} - -DECLARE_TASKLET(shrm_sw_reset_callback, shrm_modem_reset_callback, - IRQ_PRCMU_MODEM_SW_RESET_REQ); - -static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) -{ - struct shrm_dev *shrm = data; - - switch (irq) { - case IRQ_PRCMU_CA_WAKE: -#ifdef CONFIG_UX500_SUSPEND - suspend_block_sleep(); -#endif - if (shrm->msr_flag) - atomic_set(&ac_sleep_disable_count, 0); - atomic_inc(&ac_sleep_disable_count); - queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_wake_req); - break; - case IRQ_PRCMU_CA_SLEEP: - queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_sleep_req); - break; - case IRQ_PRCMU_MODEM_SW_RESET_REQ: - tasklet_schedule(&shrm_sw_reset_callback); - break; - default: - dev_err(shrm->dev, "%s: => IRQ %d\n", __func__, irq); - return IRQ_NONE; - } - return IRQ_HANDLED; -} - -static void send_ac_msg_pend_notify_0_work(struct work_struct *work) -{ - struct shrm_dev *shrm = container_of(work, struct shrm_dev, - send_ac_msg_pend_notify_0); - - dev_dbg(shrm->dev, "%s IN\n", __func__); - update_ac_common_shared_wptr(shrm); - - mutex_lock(&ac_state_mutex); - atomic_inc(&ac_sleep_disable_count); - modem_request(shrm->modem); - mutex_unlock(&ac_state_mutex); - - if (!get_host_accessport_val()) - BUG(); - - /* Trigger AcMsgPendingNotification to CMU */ - writel((1<intr_base + GOP_SET_REGISTER_BASE); - - if (shrm_common_tx_state == SHRM_PTR_FREE) - shrm_common_tx_state = SHRM_PTR_BUSY; - - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -static void send_ac_msg_pend_notify_1_work(struct work_struct *work) -{ - struct shrm_dev *shrm = container_of(work, struct shrm_dev, - send_ac_msg_pend_notify_1); - - dev_dbg(shrm->dev, "%s IN\n", __func__); - /* Update shared_wptr with writer_local_wptr) */ - update_ac_audio_shared_wptr(shrm); - - mutex_lock(&ac_state_mutex); - atomic_inc(&ac_sleep_disable_count); - modem_request(shrm->modem); - mutex_unlock(&ac_state_mutex); - - if (!get_host_accessport_val()) - BUG(); - - /* Trigger AcMsgPendingNotification to CMU */ - writel((1<intr_base + GOP_SET_REGISTER_BASE); - - if (shrm_audio_tx_state == SHRM_PTR_FREE) - shrm_audio_tx_state = SHRM_PTR_BUSY; - - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -void shm_nl_receive(struct sk_buff *skb) -{ - struct nlmsghdr *nlh = NULL; - int msg; - - dev_dbg(shm_dev->dev, "Received NL msg from user-space\n"); - - nlh = (struct nlmsghdr *)skb->data; - msg = *((int *)(NLMSG_DATA(nlh))); - switch (msg) { - case SHRM_NL_MOD_QUERY_STATE: - dev_info(shm_dev->dev, "mod-query-state from user-space\n"); - nl_send_unicast_message(nlh->nlmsg_pid); - break; - - case SHRM_NL_USER_MOD_RESET: - dev_info(shm_dev->dev, "user-space inited mod-reset-req\n"); - dev_info(shm_dev->dev, "PCRMU resets modem\n"); - prcmu_modem_reset(); - break; - - default: - dev_err(shm_dev->dev, "Invalid NL msg from user-space\n"); - break; - }; -} - -int shrm_protocol_init(struct shrm_dev *shrm, - received_msg_handler common_rx_handler, - received_msg_handler audio_rx_handler) -{ - int err; - - shm_dev = shrm; - boot_state = BOOT_INIT; - dev_info(shrm->dev, "IPC_ISA BOOT_INIT\n"); - rx_common_handler = common_rx_handler; - rx_audio_handler = audio_rx_handler; - atomic_set(&ac_sleep_disable_count, 0); - - hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - timer.function = callback; - - shrm->shm_common_ch_wr_wq = create_singlethread_workqueue - ("shm_common_channel_irq"); - if (!shrm->shm_common_ch_wr_wq) { - dev_err(shrm->dev, "failed to create work queue\n"); - return -ENOMEM; - } - shrm->shm_audio_ch_wr_wq = create_singlethread_workqueue - ("shm_audio_channel_irq"); - if (!shrm->shm_audio_ch_wr_wq) { - dev_err(shrm->dev, "failed to create work queue\n"); - err = -ENOMEM; - goto free_wq1; - } - shrm->shm_ac_wake_wq = create_singlethread_workqueue("shm_ac_wake_req"); - if (!shrm->shm_ac_wake_wq) { - dev_err(shrm->dev, "failed to create work queue\n"); - err = -ENOMEM; - goto free_wq2; - } - shrm->shm_ca_wake_wq = create_singlethread_workqueue("shm_ca_wake_req"); - if (!shrm->shm_ac_wake_wq) { - dev_err(shrm->dev, "failed to create work queue\n"); - err = -ENOMEM; - goto free_wq3; - } - shrm->shm_ac_sleep_wq = create_singlethread_workqueue - ("shm_ac_sleep_req"); - if (!shrm->shm_ac_sleep_wq) { - dev_err(shrm->dev, "failed to create work queue\n"); - err = -ENOMEM; - goto free_wq4; - } - INIT_WORK(&shrm->send_ac_msg_pend_notify_0, - send_ac_msg_pend_notify_0_work); - INIT_WORK(&shrm->send_ac_msg_pend_notify_1, - send_ac_msg_pend_notify_1_work); - INIT_WORK(&shrm->shm_ca_wake_req, shm_ca_wake_req_work); - INIT_WORK(&shrm->shm_ca_sleep_req, shm_ca_sleep_req_work); - INIT_WORK(&shrm->shm_ac_sleep_req, shm_ac_sleep_req_work); - INIT_WORK(&shrm->shm_ac_wake_req, shm_ac_wake_req_work); - - /* set tasklet data */ - shm_ca_0_tasklet.data = (unsigned long)shrm; - shm_ca_1_tasklet.data = (unsigned long)shrm; - - err = request_irq(IRQ_PRCMU_CA_SLEEP, shrm_prcmu_irq_handler, - IRQF_NO_SUSPEND, "ca-sleep", shrm); - if (err < 0) { - dev_err(shm_dev->dev, "Failed alloc IRQ_PRCMU_CA_SLEEP.\n"); - goto free_wq5; - } - - err = request_irq(IRQ_PRCMU_CA_WAKE, shrm_prcmu_irq_handler, - IRQF_NO_SUSPEND, "ca-wake", shrm); - if (err < 0) { - dev_err(shm_dev->dev, "Failed alloc IRQ_PRCMU_CA_WAKE.\n"); - goto drop2; - } - - err = request_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, shrm_prcmu_irq_handler, - IRQF_NO_SUSPEND, "modem-sw-reset-req", shrm); - if (err < 0) { - dev_err(shm_dev->dev, - "Failed alloc IRQ_PRCMU_MODEM_SW_RESET_REQ.\n"); - goto drop1; - } - -#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET - /* init netlink socket for user-space communication */ - shrm_nl_sk = netlink_kernel_create(NULL, NETLINK_SHRM, 1, - shm_nl_receive, NULL, THIS_MODULE); - - if (!shrm_nl_sk) { - dev_err(shm_dev->dev, "netlink socket creation failed\n"); - goto drop; - } -#endif - return 0; - -#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET -drop: - free_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, NULL); -#endif -drop1: - free_irq(IRQ_PRCMU_CA_WAKE, NULL); -drop2: - free_irq(IRQ_PRCMU_CA_SLEEP, NULL); -free_wq5: - destroy_workqueue(shrm->shm_ac_sleep_wq); -free_wq4: - destroy_workqueue(shrm->shm_ca_wake_wq); -free_wq3: - destroy_workqueue(shrm->shm_ac_wake_wq); -free_wq2: - destroy_workqueue(shrm->shm_audio_ch_wr_wq); -free_wq1: - destroy_workqueue(shrm->shm_common_ch_wr_wq); - return err; -} - -void shrm_protocol_deinit(struct shrm_dev *shrm) -{ - free_irq(IRQ_PRCMU_CA_SLEEP, NULL); - free_irq(IRQ_PRCMU_CA_WAKE, NULL); - free_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, NULL); - flush_scheduled_work(); - destroy_workqueue(shrm->shm_common_ch_wr_wq); - destroy_workqueue(shrm->shm_audio_ch_wr_wq); - destroy_workqueue(shrm->shm_ac_wake_wq); - destroy_workqueue(shrm->shm_ca_wake_wq); - destroy_workqueue(shrm->shm_ac_sleep_wq); - modem_put(shrm->modem); -} - -int get_ca_wake_req_state(void) -{ - return ((atomic_read(&ac_sleep_disable_count) > 0) || - modem_get_usage(shm_dev->modem)); -} - -irqreturn_t ca_wake_irq_handler(int irq, void *ctrlr) -{ - struct shrm_dev *shrm = ctrlr; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - /* initialize the FIFO Variables */ - if (boot_state == BOOT_INIT) - shm_fifo_init(shrm); - - dev_dbg(shrm->dev, "Inside ca_wake_irq_handler\n"); - - /* Clear the interrupt */ - writel((1 << GOP_CA_WAKE_REQ_BIT), - shrm->intr_base + GOP_CLEAR_REGISTER_BASE); - - /* send ca_wake_ack_interrupt to CMU */ - writel((1 << GOP_CA_WAKE_ACK_BIT), - shrm->intr_base + GOP_SET_REGISTER_BASE); - - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return IRQ_HANDLED; -} - - -irqreturn_t ac_read_notif_0_irq_handler(int irq, void *ctrlr) -{ - struct shrm_dev *shrm = ctrlr; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - shm_ac_read_0_tasklet.data = (unsigned long)shrm; - tasklet_schedule(&shm_ac_read_0_tasklet); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - /* Clear the interrupt */ - writel((1 << GOP_COMMON_AC_READ_NOTIFICATION_BIT), - shrm->intr_base + GOP_CLEAR_REGISTER_BASE); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return IRQ_HANDLED; -} - -irqreturn_t ac_read_notif_1_irq_handler(int irq, void *ctrlr) -{ - struct shrm_dev *shrm = ctrlr; - - dev_dbg(shrm->dev, "%s IN+\n", __func__); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - shm_ac_read_1_tasklet.data = (unsigned long)shrm; - tasklet_schedule(&shm_ac_read_1_tasklet); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - /* Clear the interrupt */ - writel((1 << GOP_AUDIO_AC_READ_NOTIFICATION_BIT), - shrm->intr_base + GOP_CLEAR_REGISTER_BASE); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return IRQ_HANDLED; -} - -irqreturn_t ca_msg_pending_notif_0_irq_handler(int irq, void *ctrlr) -{ - struct shrm_dev *shrm = ctrlr; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - tasklet_schedule(&shm_ca_0_tasklet); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - /* Clear the interrupt */ - writel((1 << GOP_COMMON_CA_MSG_PENDING_NOTIFICATION_BIT), - shrm->intr_base + GOP_CLEAR_REGISTER_BASE); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return IRQ_HANDLED; -} - -irqreturn_t ca_msg_pending_notif_1_irq_handler(int irq, void *ctrlr) -{ - struct shrm_dev *shrm = ctrlr; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - tasklet_schedule(&shm_ca_1_tasklet); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return IRQ_HANDLED; - } - - /* Clear the interrupt */ - writel((1<intr_base+GOP_CLEAR_REGISTER_BASE); - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return IRQ_HANDLED; - -} - -/** - * shm_write_msg() - write message to shared memory - * @shrm: pointer to the shrm device information structure - * @l2_header: L2 header - * @addr: pointer to the message - * @length: length of the message to be written - * - * This function is called from net or char interface driver write operation. - * Prior to calling this function the message is copied from the user space - * buffer to the kernel buffer. This function based on the l2 header routes - * the message to the respective channel and FIFO. Then makes a call to the - * fifo write function where the message is written to the physical device. - */ -int shm_write_msg(struct shrm_dev *shrm, u8 l2_header, - void *addr, u32 length) -{ - u8 channel = 0; - int ret; - - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (boot_state != BOOT_DONE) { - dev_err(shrm->dev, - "error after boot done call this fn\n"); - ret = -ENODEV; - goto out; - } - - if ((l2_header == L2_HEADER_ISI) || - (l2_header == L2_HEADER_RPC) || - (l2_header == L2_HEADER_SECURITY) || - (l2_header == L2_HEADER_COMMON_SIMPLE_LOOPBACK) || - (l2_header == L2_HEADER_COMMON_ADVANCED_LOOPBACK)) { - channel = 0; - if (shrm_common_tx_state == SHRM_SLEEP_STATE) - shrm_common_tx_state = SHRM_PTR_FREE; - else if (shrm_common_tx_state == SHRM_IDLE) - shrm_common_tx_state = SHRM_PTR_FREE; - - } else if ((l2_header == L2_HEADER_AUDIO) || - (l2_header == L2_HEADER_AUDIO_SIMPLE_LOOPBACK) || - (l2_header == L2_HEADER_AUDIO_ADVANCED_LOOPBACK)) { - if (shrm_audio_tx_state == SHRM_SLEEP_STATE) - shrm_audio_tx_state = SHRM_PTR_FREE; - else if (shrm_audio_tx_state == SHRM_IDLE) - shrm_audio_tx_state = SHRM_PTR_FREE; - - channel = 1; - } else { - ret = -ENODEV; - goto out; - } - ret = shm_write_msg_to_fifo(shrm, channel, l2_header, addr, length); - if (ret < 0) { - dev_err(shrm->dev, "write message to fifo failed\n"); - return ret; - } - /* - * notify only if new msg copied is the only unread one - * otherwise it means that reading process is ongoing - */ - if (is_the_only_one_unread_message(shrm, channel, length)) { - - /* Send Message Pending Noitication to CMT */ - if (channel == 0) - queue_work(shrm->shm_common_ch_wr_wq, - &shrm->send_ac_msg_pend_notify_0); - else - queue_work(shrm->shm_audio_ch_wr_wq, - &shrm->send_ac_msg_pend_notify_1); - - } - - dev_dbg(shrm->dev, "%s OUT\n", __func__); - return 0; - -out: - return ret; -} - -void ca_msg_read_notification_0(struct shrm_dev *shrm) -{ - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (get_ca_msg_0_read_notif_send() == 0) { - update_ca_common_shared_rptr(shrm); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return; - } - - /* Trigger CaMsgReadNotification to CMU */ - writel((1 << GOP_COMMON_CA_READ_NOTIFICATION_BIT), - shrm->intr_base + GOP_SET_REGISTER_BASE); - set_ca_msg_0_read_notif_send(1); - shrm_common_rx_state = SHRM_PTR_BUSY; - } - - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -void ca_msg_read_notification_1(struct shrm_dev *shrm) -{ - dev_dbg(shrm->dev, "%s IN\n", __func__); - - if (get_ca_msg_1_read_notif_send() == 0) { - update_ca_audio_shared_rptr(shrm); - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return; - } - - /* Trigger CaMsgReadNotification to CMU */ - writel((1<intr_base+GOP_SET_REGISTER_BASE); - set_ca_msg_1_read_notif_send(1); - shrm_audio_rx_state = SHRM_PTR_BUSY; - } - dev_dbg(shrm->dev, "%s OUT\n", __func__); -} - -/** - * receive_messages_common - receive common channnel msg from - * CMT(Cellular Mobile Terminal) - * @shrm: pointer to shrm device information structure - * - * The messages sent from CMT to APE are written to the respective FIFO - * and an interrupt is triggered by the CMT. This ca message pending - * interrupt calls this function. This function sends a read notification - * acknowledgement to the CMT and calls the common channel receive handler - * where the messsage is copied to the respective(ISI, RPC, SECURIT) queue - * based on the message l2 header. - */ -void receive_messages_common(struct shrm_dev *shrm) -{ - u8 l2_header; - u32 len; - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return; - } - - l2_header = read_one_l2msg_common(shrm, recieve_common_msg, &len); - /* Send Recieve_Call_back to Upper Layer */ - if (!rx_common_handler) { - dev_err(shrm->dev, "common_rx_handler is Null\n"); - BUG(); - } - (*rx_common_handler)(l2_header, &recieve_common_msg, len, - shrm); - /* SendReadNotification */ - ca_msg_read_notification_0(shrm); - - while (read_remaining_messages_common()) { - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return; - } - - l2_header = read_one_l2msg_common(shrm, recieve_common_msg, - &len); - /* Send Recieve_Call_back to Upper Layer */ - (*rx_common_handler)(l2_header, - &recieve_common_msg, len, - shrm); - } -} - -/** - * receive_messages_audio() - receive audio message from CMT - * @shrm: pointer to shrm device information structure - * - * The messages sent from CMT to APE are written to the respective FIFO - * and an interrupt is triggered by the CMT. This ca message pending - * interrupt calls this function. This function sends a read notification - * acknowledgement to the CMT and calls the common channel receive handler - * where the messsage is copied to the audio queue. - */ -void receive_messages_audio(struct shrm_dev *shrm) -{ - u8 l2_header; - u32 len; - - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return; - } - - l2_header = read_one_l2msg_audio(shrm, recieve_audio_msg, &len); - /* Send Recieve_Call_back to Upper Layer */ - - if (!rx_audio_handler) { - dev_crit(shrm->dev, "audio_rx_handler is Null\n"); - BUG(); - } - (*rx_audio_handler)(l2_header, &recieve_audio_msg, - len, shrm); - - /* SendReadNotification */ - ca_msg_read_notification_1(shrm); - while (read_remaining_messages_audio()) { - if (check_modem_in_reset()) { - dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", - __func__); - return; - } - - l2_header = read_one_l2msg_audio(shrm, - recieve_audio_msg, &len); - /* Send Recieve_Call_back to Upper Layer */ - (*rx_audio_handler)(l2_header, - &recieve_audio_msg, len, - shrm); - } -} - -u8 get_boot_state() -{ - return boot_state; -} diff --git a/drivers/modem/Kconfig b/drivers/modem/Kconfig index a23b5c90e5e..95d4307775b 100644 --- a/drivers/modem/Kconfig +++ b/drivers/modem/Kconfig @@ -18,3 +18,5 @@ config MODEM_U8500 Application processor. If unsure, say N. + +source "drivers/modem/shrm/Kconfig" diff --git a/drivers/modem/Makefile b/drivers/modem/Makefile index 57b50916c79..e1b3f376cce 100644 --- a/drivers/modem/Makefile +++ b/drivers/modem/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_MODEM) := modem_access.o obj-$(CONFIG_MODEM_U8500) += modem_u8500.o +obj-$(CONFIG_U8500_SHRM) += shrm/ diff --git a/drivers/modem/shrm/Kconfig b/drivers/modem/shrm/Kconfig new file mode 100644 index 00000000000..465c8bb10a1 --- /dev/null +++ b/drivers/modem/shrm/Kconfig @@ -0,0 +1,43 @@ +# +# SHM HW kernel configuration +# +config U8500_SHRM + bool "U8500 SHRM hardware driver" + depends on ARCH_U8500 && PHONET && MODEM_U8500 + default Y + ---help--- + If you say Y here, you will enable the STN8500 SHM hardware driver. + + If unsure, say N. +choice + prompt "Modem Image Version" + depends on U8500_SHRM + default SHRM_V1_UPDATES_VERSION + + config SHRM_V1_UPDATES_VERSION + depends on U8500_SHRM + bool "SHRM V1 UPDATES" + help + Modem Images with V1 Updates + +endchoice + +config U8500_SHRM_LOOP_BACK + bool "U8500 SHRM loopback" + depends on U8500_SHRM + default n + ---help--- + If you say Y here, you will enable the shm loopback + + If unsure, say N. + +config U8500_SHRM_MODEM_SILENT_RESET + bool "U8500 SHRM Modem Silent Reset" + depends on U8500_SHRM + default n + ---help--- + If you say Y here, you will enable the modem silent reset feature + + If unsure, say N. + + diff --git a/drivers/modem/shrm/Makefile b/drivers/modem/shrm/Makefile new file mode 100644 index 00000000000..8115c24920b --- /dev/null +++ b/drivers/modem/shrm/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for SHRM drivers +# + +ifdef CONFIG_PHONET +u8500_shrm-objs := modem_shrm_driver.o shrm_fifo.o shrm_protocol.o +else +u8500_shrm-objs := shrm_driver.o shrm_fifo.o shrm_protocol.o +endif + +obj-$(CONFIG_U8500_SHRM) += u8500_shrm.o diff --git a/drivers/modem/shrm/modem_shrm_driver.c b/drivers/modem/shrm/modem_shrm_driver.c new file mode 100644 index 00000000000..5e986ab9a2c --- /dev/null +++ b/drivers/modem/shrm/modem_shrm_driver.c @@ -0,0 +1,669 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghvi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef CONFIG_HIGH_RES_TIMERS +#include +static struct hrtimer timer; +#endif +#include +#include +#include +#include +#include +#include +#include +#include + +#include +/* debug functionality */ +#define ISA_DEBUG 0 + +#define PHONET_TASKLET +#define MAX_RCV_LEN 2048 + +static void do_phonet_rcv_tasklet(unsigned long unused); +struct tasklet_struct phonet_rcv_tasklet; + +/** + * audio_receive() - Receive audio channel completion callback + * @shrm: pointer to shrm device information structure + * @data: message pointer + * @n_bytes: message size + * @l2_header: L2 header/device ID 2->audio, 5->audio_loopback + * + * This fucntion is called from the audio receive handler. Copies the audio + * message from the FIFO to the AUDIO queue. The message is later copied from + * this queue to the user buffer through the char or net interface read + * operation. + */ +static int audio_receive(struct shrm_dev *shrm, void *data, + u32 n_bytes, u8 l2_header) +{ + u32 size = 0; + int ret = 0; + int idx; + u8 *psrc; + struct message_queue *q; + struct isadev_context *audiodev; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + idx = shrm_get_cdev_index(l2_header); + if (idx < 0) { + dev_err(shrm->dev, "failed to get index\n"); + return idx; + } + audiodev = &shrm->isa_context->isadev[idx]; + q = &audiodev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + spin_unlock(&q->update_lock); + if (ret < 0) + dev_err(shrm->dev, "Adding a msg to message queue failed"); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * common_receive() - Receive common channel completion callback + * @shrm: pointer to the shrm device information structure + * @data: message pointer + * @n_bytes: message size + * @l2_header: L2 header / device ID + * + * This function is called from the receive handler to copy the respective + * ISI, RPC, SECURITY message to its respective queue. The message is then + * copied from queue to the user buffer on char net interface read operation. + */ +static int common_receive(struct shrm_dev *shrm, void *data, + u32 n_bytes, u8 l2_header) +{ + u32 size = 0; + int ret = 0; + int idx; + u8 *psrc; + struct message_queue *q; + struct isadev_context *isa_dev; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + idx = shrm_get_cdev_index(l2_header); + if (idx < 0) { + dev_err(shrm->dev, "failed to get index\n"); + return idx; + } + isa_dev = &shrm->isa_context->isadev[idx]; + q = &isa_dev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + dev_dbg(shrm->dev, "Inside Loop Back\n"); + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + spin_unlock(&q->update_lock); + if (ret < 0) { + dev_err(shrm->dev, "Adding a msg to message queue failed"); + return ret; + } + + + if (l2_header == ISI_MESSAGING) { + if (shrm->netdev_flag_up) { + dev_dbg(shrm->dev, + "scheduling the phonet tasklet from %s!\n", + __func__); + tasklet_schedule(&phonet_rcv_tasklet); + } + dev_dbg(shrm->dev, + "Out of phonet tasklet %s!!!\n", __func__); + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * rx_common_l2msg_handler() - common channel receive handler + * @l2_header: L2 header + * @msg: pointer to the receive buffer + * @length: length of the msg to read + * @shrm: pointer to shrm device information structure + * + * This function is called to receive the message from CaMsgPendingNotification + * interrupt handler. + */ +static void rx_common_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; + dev_dbg(shrm->dev, "%s IN\n", __func__); + + ret = common_receive(shrm, msg, length, l2_header); + if (ret < 0) + dev_err(shrm->dev, + "common receive with l2 header %d failed\n", l2_header); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +/** + * rx_audio_l2msg_handler() - audio channel receive handler + * @l2_header: L2 header + * @msg: pointer to the receive buffer + * @length: length of the msg to read + * @shrm: pointer to shrm device information structure + * + * This function is called to receive the message from CaMsgPendingNotification + * interrupt handler. + */ +static void rx_audio_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + ret = audio_receive(shrm, msg, length, l2_header); + if (ret < 0) + dev_err(shrm->dev, "audio receive failed\n"); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static int __init shm_initialise_irq(struct shrm_dev *shrm) +{ + int err = 0; + + err = shrm_protocol_init(shrm, + rx_common_l2msg_handler, rx_audio_l2msg_handler); + if (err < 0) { + dev_err(shrm->dev, "SHM Protocol Init Failure\n"); + return err; + } + + err = request_irq(shrm->ca_wake_irq, + ca_wake_irq_handler, IRQF_TRIGGER_RISING, + "ca_wake-up", shrm); + if (err < 0) { + dev_err(shrm->dev, + "Unable to allocate shm tx interrupt line\n"); + free_irq(shrm->ca_wake_irq, shrm); + return err; + } + + err = request_irq(shrm->ac_read_notif_0_irq, + ac_read_notif_0_irq_handler, 0, + "ac_read_notif_0", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_0_irq interrupt line\n"); + goto irq_err1; + } + + err = request_irq(shrm->ac_read_notif_1_irq, + ac_read_notif_1_irq_handler, 0, + "ac_read_notif_1", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_1_irq interrupt line\n"); + goto irq_err2; + } + + err = request_irq(shrm->ca_msg_pending_notif_0_irq, + ca_msg_pending_notif_0_irq_handler, 0, + "ca_msg_pending_notif_0", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_0_irq line\n"); + goto irq_err3; + } + + err = request_irq(shrm->ca_msg_pending_notif_1_irq, + ca_msg_pending_notif_1_irq_handler, 0, + "ca_msg_pending_notif_1", shrm); + + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_1_irq interrupt line\n"); + goto irq_err4; + } + return err; +irq_err4: + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); +irq_err3: + free_irq(shrm->ac_read_notif_1_irq, shrm); +irq_err2: + free_irq(shrm->ac_read_notif_0_irq, shrm); +irq_err1: + free_irq(shrm->ca_wake_irq, shrm); + return err; +} + +static void free_shm_irq(struct shrm_dev *shrm) +{ + free_irq(shrm->ca_wake_irq, shrm); + free_irq(shrm->ac_read_notif_0_irq, shrm); + free_irq(shrm->ac_read_notif_1_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_1_irq, shrm); +} + + + +#ifdef CONFIG_HIGH_RES_TIMERS +static enum hrtimer_restart callback(struct hrtimer *timer) +{ + return HRTIMER_NORESTART; +} +#endif + +void do_phonet_rcv_tasklet(unsigned long unused) +{ + ssize_t ret; + struct shrm_dev *shrm = (struct shrm_dev *)unused; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + for (;;) { + ret = shrm_net_receive(shrm->ndev); + if (ret == 0) { + dev_dbg(shrm->dev, "len is zero, queue empty\n"); + break; + } + if (ret < 0) { + dev_err(shrm->dev, "len < 0 !!! error!!!\n"); + break; + } + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static int shrm_probe(struct platform_device *pdev) +{ + int err = 0; + struct resource *res; + struct shrm_dev *shrm = NULL; + + shrm = kzalloc(sizeof(struct shrm_dev), GFP_KERNEL); + if (shrm == NULL) { + dev_err(&pdev->dev, + "Could not allocate memory for struct shm_dev\n"); + return -ENOMEM; + } + + shrm->dev = &pdev->dev; + shrm->modem = modem_get(shrm->dev, "u8500-shrm-modem"); + if (shrm->modem == NULL) { + dev_err(shrm->dev, " Could not retrieve the modem.\n"); + return -ENODEV; + } + + /* initialise the SHM */ + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(shrm->dev, + "Unable to map Ca Wake up interrupt\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_wake_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); + + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_common IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_0_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); + + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_1_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 3); + + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_common IRQbase\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_0_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 4); + + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_1_irq = res->start; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + if (!res) { + dev_err(shrm->dev, + "Could not get SHM IO memory information\n"); + err = -ENODEV; + goto rollback_intr; + } + shrm->intr_base = (void __iomem *)ioremap_nocache(res->start, + res->end - res->start + 1); + if (!(shrm->intr_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ape_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_COMMON_BASE; + shrm->ape_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_APE_COMMON_BASE, + SHM_FIFO_0_SIZE); + shrm->ape_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->ape_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_common_fifo_base; + } + shrm->cmt_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_COMMON_BASE; + shrm->cmt_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_CMT_COMMON_BASE, SHM_FIFO_0_SIZE); + shrm->cmt_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->cmt_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_common_fifo_base; + } + shrm->ape_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_AUDIO_BASE; + shrm->ape_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_APE_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->ape_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->ape_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_audio_fifo_base; + } + shrm->cmt_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_AUDIO_BASE; + shrm->cmt_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_CMT_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->cmt_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->cmt_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_audio_fifo_base; + } + shrm->ac_common_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ac_common_shared_wptr; + } + shrm->ac_common_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_common_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_common_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ac_audio_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ac_audio_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_audio_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + shrm->ca_audio_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + if (isa_init(shrm) != 0) { + dev_err(shrm->dev, "Driver Initialization Error\n"); + err = -EBUSY; + } + /* install handlers and tasklets */ + if (shm_initialise_irq(shrm)) { + dev_err(shrm->dev, + "shm error in interrupt registration\n"); + goto rollback_irq; + } +#ifdef CONFIG_HIGH_RES_TIMERS + hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer.function = callback; + hrtimer_start(&timer, ktime_set(0, 2*NSEC_PER_MSEC), HRTIMER_MODE_REL); +#endif + err = shrm_register_netdev(shrm); + if (err < 0) + goto rollback_irq; + + tasklet_init(&phonet_rcv_tasklet, do_phonet_rcv_tasklet, 0); + phonet_rcv_tasklet.data = (unsigned long)shrm; + + platform_set_drvdata(pdev, shrm); + + return err; +rollback_irq: + free_shm_irq(shrm); +rollback_map: + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); +rollback_ac_common_shared_wptr: + iounmap(shrm->cmt_audio_fifo_base); +rollback_cmt_audio_fifo_base: + iounmap(shrm->ape_audio_fifo_base); +rollback_ape_audio_fifo_base: + iounmap(shrm->cmt_common_fifo_base); +rollback_cmt_common_fifo_base: + iounmap(shrm->ape_common_fifo_base); +rollback_ape_common_fifo_base: + iounmap(shrm->intr_base); +rollback_intr: + kfree(shrm); + return err; +} + +static int __exit shrm_remove(struct platform_device *pdev) +{ + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + free_shm_irq(shrm); + iounmap(shrm->intr_base); + iounmap(shrm->ape_common_fifo_base); + iounmap(shrm->cmt_common_fifo_base); + iounmap(shrm->ape_audio_fifo_base); + iounmap(shrm->cmt_audio_fifo_base); + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); + shrm_unregister_netdev(shrm); + isa_exit(shrm); + kfree(shrm); + + return 0; +} + +#ifdef CONFIG_PM +/** + * u8500_shrm_suspend() - This routine puts the SHRM in to sustend state. + * @dev: pointer to device structure. + * + * This routine checks the current ongoing communication with Modem by + * examining the ca_wake state and prevents suspend if modem communication + * is on-going. + * If ca_wake = 1 (high), modem comm. is on-going; don't suspend + * If ca_wake = 0 (low), no comm. with modem on-going.Allow suspend + */ +int u8500_shrm_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + int err; + + dev_dbg(&pdev->dev, "%s called...\n", __func__); + dev_dbg(&pdev->dev, "ca_wake_req_state = %x\n", + get_ca_wake_req_state()); + + /* if ca_wake_req is high, prevent system suspend */ + if (!get_ca_wake_req_state()) { + err = shrm_suspend_netdev(shrm->ndev); + return err; + } else + return -EBUSY; +} + +/** + * u8500_shrm_resume() - This routine resumes the SHRM from suspend state. + * @dev: pointer to device structure + * + * This routine restore back the current state of the SHRM + */ +int u8500_shrm_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + int err; + + dev_dbg(&pdev->dev, "%s called...\n", __func__); + err = shrm_resume_netdev(shrm->ndev); + + return err; +} + +static const struct dev_pm_ops shrm_dev_pm_ops = { + .suspend_noirq = u8500_shrm_suspend, + .resume_noirq = u8500_shrm_resume, +}; +#endif + +static struct platform_driver shrm_driver = { + .remove = __exit_p(shrm_remove), + .driver = { + .name = "u8500_shrm", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &shrm_dev_pm_ops, +#endif + }, +}; + +static int __init shrm_driver_init(void) +{ + return platform_driver_probe(&shrm_driver, shrm_probe); +} + +static void __exit shrm_driver_exit(void) +{ + platform_driver_unregister(&shrm_driver); +} + +module_init(shrm_driver_init); +module_exit(shrm_driver_exit); + +MODULE_AUTHOR("Biju Das, Kumar Sanghvi, Arun Murthy"); +MODULE_DESCRIPTION("Shared Memory Modem Driver Interface"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/modem/shrm/shrm_driver.c b/drivers/modem/shrm/shrm_driver.c new file mode 100644 index 00000000000..11540831f95 --- /dev/null +++ b/drivers/modem/shrm/shrm_driver.c @@ -0,0 +1,1439 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghvi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#define DEBUG + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + + +#ifdef CONFIG_HIGH_RES_TIMERS +#include +static struct hrtimer timer; +#endif + + +#define NAME "IPC_ISA" +#define ISA_DEVICES 4 +/**debug functionality*/ +#define ISA_DEBUG 0 + +#define ISI_MESSAGING (0) +#define RPC_MESSAGING (1) +#define AUDIO_MESSAGING (2) +#define SECURITY_MESSAGING (3) + +#define SIZE_OF_FIFO (512*1024) + +static u8 message_fifo[4][SIZE_OF_FIFO]; + +static u8 wr_isi_msg[10*1024]; +static u8 wr_rpc_msg[10*1024]; +static u8 wr_sec_msg[10*1024]; +static u8 wr_audio_msg[10*1024]; + +/* global data */ +/* + * int major:This variable is exported to user as module_param to specify + * major number at load time + */ +static int major; +module_param(major, int, 0); +MODULE_PARM_DESC(major, "Major device number"); +/* global fops mutex */ +static DEFINE_MUTEX(isa_lock); +rx_cb common_rx; +rx_cb audio_rx; + + +static int isi_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); +static int rpc_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); +static int audio_receive(struct shrm_dev *shrm, void *data, u32 n_bytes); +static int security_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes); + +static void rx_common_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + u8 *pdata; +#endif + dev_dbg(shrm->dev, "%s IN\n", __func__); + + switch (l2_header) { + case ISI_MESSAGING: + ret = isi_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "isi receive failed\n"); + break; + case RPC_MESSAGING: + ret = rpc_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "rpc receive failed\n"); + break; + case SECURITY_MESSAGING: + ret = security_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, + "security receive failed\n"); + break; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + case COMMMON_LOOPBACK_MESSAGING: + pdata = (u8 *)msg; + if ((*pdata == 0x50) || (*pdata == 0xAF)) { + ret = isi_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "isi receive failed\n"); + } else if ((*pdata == 0x0A) || (*pdata == 0xF5)) { + ret = rpc_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "rpc receive failed\n"); + } else if ((*pdata == 0xFF) || (*pdata == 0x00)) { + ret = security_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, + "security receive failed\n"); + } + break; +#endif + default: + break; + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static void rx_audio_l2msg_handler(u8 l2_header, + void *msg, u32 length, + struct shrm_dev *shrm) +{ + int ret = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + audio_receive(shrm, msg, length); + if (ret < 0) + dev_err(shrm->dev, "audio receive failed\n"); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static int __init shm_initialise_irq(struct shrm_dev *shrm) +{ + int err = 0; + + shrm_protocol_init(shrm, + rx_common_l2msg_handler, rx_audio_l2msg_handler); + + err = request_irq(shrm->ca_wake_irq, + ca_wake_irq_handler, IRQF_TRIGGER_RISING, + "ca_wake-up", shrm); + if (err < 0) { + dev_err(shrm->dev, + "Unable to allocate shm tx interrupt line\n"); + return err; + } + + err = request_irq(shrm->ac_read_notif_0_irq, + ac_read_notif_0_irq_handler, 0, + "ac_read_notif_0", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_0_irq interrupt line\n"); + goto irq_err1; + } + + err = request_irq(shrm->ac_read_notif_1_irq, + ac_read_notif_1_irq_handler, 0, + "ac_read_notif_1", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ac_read_notif_1_irq interrupt line\n"); + goto irq_err2; + } + + err = request_irq(shrm->ca_msg_pending_notif_0_irq, + ca_msg_pending_notif_0_irq_handler, 0, + "ca_msg_pending_notif_0", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_0_irq line\n"); + goto irq_err3; + } + + err = request_irq(shrm->ca_msg_pending_notif_1_irq, + ca_msg_pending_notif_1_irq_handler, 0, + "ca_msg_pending_notif_1", shrm); + if (err < 0) { + dev_err(shrm->dev, + "error ca_msg_pending_notif_1_irq interrupt line\n"); + goto irq_err4; + } + + return err; + +irq_err4: + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); +irq_err3: + free_irq(shrm->ac_read_notif_1_irq, shrm); +irq_err2: + free_irq(shrm->ac_read_notif_0_irq, shrm); +irq_err1: + free_irq(shrm->ca_wake_irq, shrm); + return err; +} + +static void free_shm_irq(struct shrm_dev *shrm) +{ + free_irq(shrm->ca_wake_irq, shrm); + free_irq(shrm->ac_read_notif_0_irq, shrm); + free_irq(shrm->ac_read_notif_1_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_0_irq, shrm); + free_irq(shrm->ca_msg_pending_notif_1_irq, shrm); +} + +/** + * create_queue() - To create FIFO for Tx and Rx message buffering. + * @q: message queue. + * @devicetype: device type 0-isi,1-rpc,2-audio,3-security. + * + * This function creates a FIFO buffer of n_bytes size using + * dma_alloc_coherent(). It also initializes all queue handling + * locks, queue management pointers. It also initializes message list + * which occupies this queue. + * + * It return -ENOMEM in case of no memory. + */ +static int create_queue(struct message_queue *q, u32 devicetype, + struct shrm_dev *shrm) +{ + q->fifo_base = (u8 *)&message_fifo[devicetype]; + q->size = SIZE_OF_FIFO; + q->readptr = 0; + q->writeptr = 0; + q->no = 0; + q->shrm = shrm; + spin_lock_init(&q->update_lock); + INIT_LIST_HEAD(&q->msg_list); + init_waitqueue_head(&q->wq_readable); + atomic_set(&q->q_rp, 0); + + return 0; +} +/** + * delete_queue() - To delete FIFO and assiciated memory. + * @q: message queue + * + * This function deletes FIFO created using create_queue() function. + * It resets queue management pointers. + */ +static void delete_queue(struct message_queue *q) +{ + q->size = 0; + q->readptr = 0; + q->writeptr = 0; +} + +/** + * add_msg_to_queue() - Add a message inside inside queue + * + * @q: message queue + * @size: size in bytes + * + * This function tries to allocate n_bytes of size in FIFO q. + * It returns negative number when no memory can be allocated + * currently. + */ +int add_msg_to_queue(struct message_queue *q, u32 size) +{ + struct queue_element *new_msg = NULL; + struct shrm_dev *shrm = q->shrm; + + dev_dbg(shrm->dev, "%s IN q->writeptr=%d\n", + __func__, q->writeptr); + new_msg = kmalloc(sizeof(struct queue_element), + GFP_KERNEL|GFP_ATOMIC); + + if (new_msg == NULL) { + dev_err(shrm->dev, "memory overflow inside while(1)\n"); + return -ENOMEM; + } + new_msg->offset = q->writeptr; + new_msg->size = size; + new_msg->no = q->no++; + + /* check for overflow condition */ + if (q->readptr <= q->writeptr) { + if (((q->writeptr-q->readptr) + size) >= q->size) { + dev_err(shrm->dev, "Buffer overflow !!\n"); + BUG_ON(((q->writeptr-q->readptr) + size) >= q->size); + } + } else { + if ((q->writeptr + size) >= q->readptr) { + dev_err(shrm->dev, "Buffer overflow !!\n"); + BUG_ON((q->writeptr + size) >= q->readptr); + } + } + q->writeptr = (q->writeptr + size) % q->size; + if (list_empty(&q->msg_list)) { + list_add_tail(&new_msg->entry, &q->msg_list); + /* There can be 2 blocking calls read and another select */ + + atomic_set(&q->q_rp, 1); + wake_up_interruptible(&q->wq_readable); + } else + list_add_tail(&new_msg->entry, &q->msg_list); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; +} + +/** + * remove_msg_from_queue() - To remove a message from the msg queue. + * + * @q: message queue + * + * This function delets a message from the message list associated with message + * queue q and also updates read ptr. + * If the message list is empty, then, event is set to block the select and + * read calls of the paricular queue. + * + * The message list is FIFO style and message is always added to tail and + * removed from head. + */ + +int remove_msg_from_queue(struct message_queue *q) +{ + struct queue_element *old_msg = NULL; + struct shrm_dev *shrm = q->shrm; + struct list_head *msg; + + dev_dbg(shrm->dev, "%s IN q->readptr %d\n", + __func__, q->readptr); + + list_for_each(msg, &q->msg_list) { + old_msg = list_entry(msg, struct queue_element, entry); + if (old_msg == NULL) { + dev_err(shrm->dev, ":no message found\n"); + return -EFAULT; + } + break; + } + list_del(msg); + q->readptr = (q->readptr + old_msg->size) % q->size; + if (list_empty(&q->msg_list)) { + dev_dbg(shrm->dev, "List is empty setting RP= 0\n"); + atomic_set(&q->q_rp, 0); + } + kfree(old_msg); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; +} + +/** + * get_size_of_new_msg() - retrieve new message from message list + * + * @q: message queue + * + * This function will retrieve most recent message from the corresponding + * queue list. New message is always retrieved from head side. + * It returns new message no, offset if FIFO and size. + */ +int get_size_of_new_msg(struct message_queue *q) +{ + struct queue_element *new_msg = NULL; + struct list_head *msg_list; + struct shrm_dev *shrm = q->shrm; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + spin_lock_bh(&q->update_lock); + list_for_each(msg_list, &q->msg_list) { + new_msg = list_entry(msg_list, struct queue_element, entry); + if (new_msg == NULL) { + spin_unlock_bh(&q->update_lock); + dev_err(shrm->dev, "no message found\n"); + return -1; + } + break; + } + spin_unlock_bh(&q->update_lock); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return new_msg->size; +} + +/** + * isi_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes:message size + * + * This function is a callback to indicate ISI message reception is complete. + * It updates Writeptr of the Fifo + */ +static int isi_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *isidev = &shrm->isa_context->isadev[0]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &isidev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + dev_dbg(shrm->dev, "Inside Loop Back\n"); + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * rpc_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes:message size + * + * This function is a callback to indicate RPC message reception is complete. + * It updates Writeptr of the Fifo + */ +static int rpc_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *rpcdev = &shrm->isa_context->isadev[1]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &rpcdev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * audio_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes:message size + * + * This function is a callback to indicate audio message reception is complete. + * It updates Writeptr of the Fifo + */ +static int audio_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *audiodev = &shrm->isa_context->isadev[2]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &audiodev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * security_receive() - Rx Completion callback + * + * @data:message pointer + * @n_bytes: message size + * + * This function is a callback to indicate security message reception + * is complete.It updates Writeptr of the Fifo + */ +static int security_receive(struct shrm_dev *shrm, + void *data, u32 n_bytes) +{ + u32 size = 0; + int ret = 0; + u8 *psrc; + struct message_queue *q; + struct isadev_context *secdev = &shrm->isa_context->isadev[3]; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + q = &secdev->dl_queue; + spin_lock(&q->update_lock); + /* Memcopy RX data first */ + if ((q->writeptr+n_bytes) >= q->size) { + psrc = (u8 *)data; + size = (q->size-q->writeptr); + /* Copy First Part of msg */ + memcpy((q->fifo_base+q->writeptr), psrc, size); + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + memcpy(q->fifo_base, psrc, (n_bytes-size)); + } else { + memcpy((q->fifo_base+q->writeptr), data, n_bytes); + } + ret = add_msg_to_queue(q, n_bytes); + if (ret < 0) + dev_err(shrm->dev, "Adding msg to message queue failed\n"); + spin_unlock(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + + +/** + * isa_select() - Select Interface + * + * @filp:file descriptor pointer + * @wait:poll_table_struct pointer + * + * This function is used to perform non-blocking read operations. It allows + * a process to determine whether it can read from one or more open files + * without blocking. These calls can also block a process until any of a + * given set of file descriptors becomes available for reading. + * If a file is ready to read, POLLIN | POLLRDNORM bitmask is returned. + * The driver method is called whenever the user-space program performs a select + * system call involving a file descriptor associated with the driver. + */ +static u32 isa_select(struct file *filp, + struct poll_table_struct *wait) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + u32 mask = 0; + u32 m = iminor(filp->f_path.dentry->d_inode); + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (isadev->device_id != m) + return -1; + q = &isadev->dl_queue; + poll_wait(filp, &q->wq_readable, wait); + if (atomic_read(&q->q_rp) == 1) + mask = POLLIN | POLLRDNORM; + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return mask; +} + +/** + * isa_read() - Read from device + * + * @filp:file descriptor + * @buf:user buffer pointer + * @len:size of requested data transfer + * @ppos:not used + * + * This function is called whenever user calls read() system call. + * It reads a oldest message from queue and copies it into user buffer and + * returns its size. + * If there is no message present in queue, then it blocks until new data is + * available. + */ +ssize_t isa_read(struct file *filp, char __user *buf, + size_t len, loff_t *ppos) +{ + struct isadev_context *isadev = (struct isadev_context *) + filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + char *psrc; + u32 msgsize; + u32 size = 0; + int ret = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (len <= 0) + return -EFAULT; + q = &isadev->dl_queue; + + spin_lock_bh(&q->update_lock); + if (list_empty(&q->msg_list)) { + spin_unlock_bh(&q->update_lock); + if (wait_event_interruptible(q->wq_readable, + atomic_read(&q->q_rp) == 1)) { + return -ERESTARTSYS; + } + } else + spin_unlock_bh(&q->update_lock); + + msgsize = get_size_of_new_msg(q); + if ((q->readptr+msgsize) >= q->size) { + dev_dbg(shrm->dev, "Inside Loop Back\n"); + psrc = (char *)buf; + size = (q->size-q->readptr); + /* Copy First Part of msg */ + if (copy_to_user(psrc, + (u8 *)(q->fifo_base+q->readptr), + size)) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + psrc += size; + /* Copy Second Part of msg at the top of fifo */ + if (copy_to_user(psrc, + (u8 *)(q->fifo_base), + (msgsize-size))) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + } else { + if (copy_to_user(buf, + (u8 *)(q->fifo_base+q->readptr), + msgsize)) { + dev_err(shrm->dev, "copy_to_user failed\n"); + return -EFAULT; + } + } + + spin_lock_bh(&q->update_lock); + ret = remove_msg_from_queue(q); + if (ret < 0) { + dev_err(shrm->dev, + "Removing msg from message queue failed\n"); + msgsize = ret; + } + spin_unlock_bh(&q->update_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return msgsize; +} +/** + * isa_write() - Write to device + * + * @filp:file descriptor + * @buf:user buffer pointer + * @len:size of requested data transfer + * @ppos:not used + * + * This function is called whenever user calls write() system call. + * It checks if there is space available in queue, and copies the message + * inside queue. If there is no space, it blocks until space becomes available. + * It also schedules transfer thread to transmit the newly added message. + */ +static ssize_t isa_write(struct file *filp, const char __user *buf, + size_t len, loff_t *ppos) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct message_queue *q; + int err, ret; + void *addr = 0; + u8 l2_header = 0; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + if (len <= 0) + return -EFAULT; + q = &isadev->dl_queue; + + switch (isadev->device_id) { + case ISI_MESSAGING: + dev_dbg(shrm->dev, "ISI\n"); + addr = (void *)wr_isi_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + dev_dbg(shrm->dev, "Loopback\n"); + l2_header = COMMON_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + break; + case RPC_MESSAGING: + dev_dbg(shrm->dev, "RPC\n"); + addr = (void *)wr_rpc_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + l2_header = COMMON_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + break; + case AUDIO_MESSAGING: + dev_dbg(shrm->dev, "Audio\n"); + addr = (void *)wr_audio_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + l2_header = AUDIO_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + + break; + case SECURITY_MESSAGING: + dev_dbg(shrm->dev, "Security\n"); + addr = (void *)wr_sec_msg; +#ifdef CONFIG_U8500_SHRM_LOOP_BACK + l2_header = COMMON_LOOPBACK_MESSAGING; +#else + l2_header = isadev->device_id; +#endif + break; + default: + dev_dbg(shrm->dev, "Wrong device\n"); + return -EFAULT; + } + + if (copy_from_user(addr, buf, len)) { + dev_err(shrm->dev, "copy_from_user failed\n"); + return -EFAULT; + } + + /* Write msg to Fifo */ + if (isadev->device_id == 2) { + mutex_lock(&shrm->isa_context->tx_audio_mutex); + err = shm_write_msg(shrm, l2_header, addr, len); + if (!err) + ret = len; + else + ret = err; + mutex_unlock(&shrm->isa_context->tx_audio_mutex); + } else { + spin_lock_bh(&shrm->isa_context->common_tx); + err = shm_write_msg(shrm, l2_header, addr, len); + if (!err) + ret = len; + else + ret = err; + spin_unlock_bh(&shrm->isa_context->common_tx); + } + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return ret; +} + +/** + * isa_ioctl() - To handle different ioctl commands supported by driver. + * + * @inode: structure is used by the kernel internally to represent files + * @filp:file descriptor pointer + * @cmd:ioctl command + * @arg:input param + * + * Following ioctls are supported by this driver. + * DLP_IOCTL_ALLOCATE_BUFFER - To allocate buffer for new uplink message. + * This ioctl is called with required message size. It returns offset for + * the allocates space in the queue. DLP_IOCTL_PUT_MESSAGE - To indicate + * new uplink message available in queuq for transmission. Message is copied + * from offset location returned by previous ioctl before calling this ioctl. + * DLP_IOCTL_GET_MESSAGE - To check if any downlink message is available in + * queue. It returns offset for new message inside queue. + * DLP_IOCTL_DEALLOCATE_BUFFER - To deallocate any buffer allocate for + * downlink message once the message is copied. Message is copied from offset + * location returned by previous ioctl before calling this ioctl. + */ +static int isa_ioctl(struct inode *inode, struct file *filp, + unsigned cmd, unsigned long arg) +{ + int err = 0; + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + u32 m = iminor(inode); + + if (isadev->device_id != m) + return -1; + + switch (cmd) { + case DLP_IOC_ALLOCATE_BUFFER: + dev_dbg(shrm->dev, "DLP_IOC_ALLOCATE_BUFFER\n"); + break; + case DLP_IOC_PUT_MESSAGE: + dev_dbg(shrm->dev, "DLP_IOC_PUT_MESSAGE\n"); + break; + case DLP_IOC_GET_MESSAGE: + dev_dbg(shrm->dev, "DLP_IOC_GET_MESSAGE\n"); + break; + case DLP_IOC_DEALLOCATE_BUFFER: + dev_dbg(shrm->dev, "DLP_IOC_DEALLOCATE_BUFFER\n"); + break; + default: + dev_dbg(shrm->dev, "Unknown IOCTL\n"); + err = -1; + break; + } + return err; +} +/** + * isa_mmap() - Maps kernel queue memory to user space. + * + * @filp:file descriptor pointer + * @vma:virtual area memory structure. + * + * This function maps kernel FIFO into user space. This function + * shall be called twice to map both uplink and downlink buffers. + */ +static int isa_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + + u32 m = iminor(filp->f_path.dentry->d_inode); + dev_dbg(shrm->dev, "%s %dIN\n", __func__, m); + + isadev = (struct isadev_context *)filp->private_data; + return 0; +} + +/** + * isa_close() - Close device file + * + * @inode:structure is used by the kernel internally to represent files + * @filp:device file descriptor + * + * This function deletes structues associated with this file, deletes + * queues, flushes and destroys workqueus and closes this file. + * It also unregisters itself from l2mux driver. + */ +static int isa_close(struct inode *inode, struct file *filp) +{ + struct isadev_context *isadev = filp->private_data; + struct shrm_dev *shrm = isadev->dl_queue.shrm; + struct isa_driver_context *isa_context = shrm->isa_context; + u8 m; + + mutex_lock(&isa_lock); + m = iminor(filp->f_path.dentry->d_inode); + dev_dbg(shrm->dev, "%s IN %d", __func__, m); + + if (atomic_dec_and_test(&isa_context->is_open[m])) { + atomic_inc(&isa_context->is_open[m]); + dev_err(shrm->dev, "Device not opened yet\n"); + mutex_unlock(&isa_lock); + return -ENODEV; + } + atomic_set(&isa_context->is_open[m], 1); + + dev_dbg(shrm->dev, "isadev->device_id %d", isadev->device_id); + dev_dbg(shrm->dev, "Closed %d device\n", m); + + if (m == ISI_MESSAGING) + dev_dbg(shrm->dev, "Closed ISI_MESSAGING Device\n"); + else if (m == RPC_MESSAGING) + dev_dbg(shrm->dev, "Closed RPC_MESSAGING Device\n"); + else if (m == AUDIO_MESSAGING) + dev_dbg(shrm->dev, "Closed AUDIO_MESSAGING Device\n"); + else if (m == SECURITY_MESSAGING) + dev_dbg(shrm->dev, "Closed SECURITY_MESSAGING Device\n"); + else + dev_dbg(shrm->dev, NAME ":No such device present\n"); + + mutex_unlock(&isa_lock); + return 0; +} +/** + * isa_open() - Open device file + * + * @inode: structure is used by the kernel internally to represent files + * @filp: device file descriptor + * + * This function performs initialization tasks needed to open SHM channel. + * Following tasks are performed. + * -return if device is already opened + * -create uplink FIFO + * -create downlink FIFO + * -init delayed workqueue thread + * -register to l2mux driver + */ +static int isa_open(struct inode *inode, struct file *filp) +{ + int err = 0; + u8 m; + struct isadev_context *isadev; + struct isa_driver_context *isa_context = container_of( + inode->i_cdev, + struct isa_driver_context, + cdev); + struct shrm_dev *shrm = isa_context->isadev->dl_queue.shrm; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (get_boot_state() != BOOT_DONE) { + dev_err(shrm->dev, "Boot is not done\n"); + return -EBUSY; + } + mutex_lock(&isa_lock); + m = iminor(inode); + + if ((m != ISI_MESSAGING) && (m != RPC_MESSAGING) && + (m != AUDIO_MESSAGING) && (m != SECURITY_MESSAGING)) { + dev_err(shrm->dev, "No such device present\n"); + mutex_unlock(&isa_lock); + return -ENODEV; + } + if (!atomic_dec_and_test(&isa_context->is_open[m])) { + atomic_inc(&isa_context->is_open[m]); + dev_err(shrm->dev, "Device already opened\n"); + mutex_unlock(&isa_lock); + return -EBUSY; + } + + if (m == ISI_MESSAGING) + dev_dbg(shrm->dev, "Open ISI_MESSAGING Device\n"); + else if (m == RPC_MESSAGING) + dev_dbg(shrm->dev, "Open RPC_MESSAGING Device\n"); + else if (m == AUDIO_MESSAGING) + dev_dbg(shrm->dev, "Open AUDIO_MESSAGING Device\n"); + else if (m == SECURITY_MESSAGING) + dev_dbg(shrm->dev, "Open SECURITY_MESSAGING Device\n"); + else + dev_dbg(shrm->dev, ":No such device present\n"); + + isadev = &isa_context->isadev[m]; + if (filp != NULL) + filp->private_data = isadev; + + mutex_unlock(&isa_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return err; +} + +const struct file_operations isa_fops = { + .owner = THIS_MODULE, + .open = isa_open, + .release = isa_close, + .ioctl = isa_ioctl, + .mmap = isa_mmap, + .read = isa_read, + .write = isa_write, + .poll = isa_select, +}; + +/** + * isa_init() - module insertion function + * + * This function registers module as a character driver using + * register_chrdev_region() or alloc_chrdev_region. It adds this + * driver to system using cdev_add() call. Major number is dynamically + * allocated using alloc_chrdev_region() by default or left to user to specify + * it during load time. For this variable major is used as module_param + * Nodes to be created using + * mknod /dev/isi c $major 0 + * mknod /dev/rpc c $major 1 + * mknod /dev/audio c $major 2 + * mknod /dev/sec c $major 3 + */ +int isa_init(struct shrm_dev *shrm) +{ + dev_t dev_id; + int retval, no_dev; + struct isadev_context *isadev; + struct isa_driver_context *isa_context; + + isa_context = kzalloc(sizeof(struct isa_driver_context), + GFP_KERNEL); + shrm->isa_context = isa_context; + if (isa_context == NULL) { + dev_err(shrm->dev, "Failed to alloc memory\n"); + return -ENOMEM; + } + + if (major) { + dev_id = MKDEV(major, 0); + retval = register_chrdev_region(dev_id, ISA_DEVICES, NAME); + } else { + retval = alloc_chrdev_region(&dev_id, 0, ISA_DEVICES, NAME); + major = MAJOR(dev_id); + } + + dev_dbg(shrm->dev, "major %d\n", major); + + cdev_init(&isa_context->cdev, &isa_fops); + isa_context->cdev.owner = THIS_MODULE; + retval = cdev_add(&isa_context->cdev, dev_id, ISA_DEVICES); + if (retval) { + dev_err(shrm->dev, "Failed to add char device\n"); + return retval; + } + + for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) + atomic_set(&isa_context->is_open[no_dev], 1); + + isa_context->isadev = kzalloc(sizeof + (struct isadev_context)*ISA_DEVICES, + GFP_KERNEL); + if (isa_context->isadev == NULL) { + dev_err(shrm->dev, "Failed to alloc memory\n"); + return -ENOMEM; + } + for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) { + isadev = &isa_context->isadev[no_dev]; + isadev->device_id = no_dev; + retval = create_queue(&isadev->dl_queue, + isadev->device_id, shrm); + if (retval < 0) { + dev_err(shrm->dev, "create dl_queue failed\n"); + delete_queue(&isadev->dl_queue); + kfree(isadev); + return retval; + } + } + mutex_init(&isa_context->tx_audio_mutex); + spin_lock_init(&isa_context->common_tx); + + dev_err(shrm->dev, "SHRM char driver added\n"); + + return retval; +} + +void isa_exit(struct shrm_dev *shrm) +{ + int no_dev; + struct isadev_context *isadev; + struct isa_driver_context *isa_context = shrm->isa_context; + dev_t dev_id = MKDEV(major, 0); + + for (no_dev = 0; no_dev < ISA_DEVICES; no_dev++) { + isadev = &isa_context->isadev[no_dev]; + delete_queue(&isadev->dl_queue); + kfree(isadev); + } + + cdev_del(&isa_context->cdev); + unregister_chrdev_region(dev_id, ISA_DEVICES); + kfree(isa_context); + + dev_err(shrm->dev, "SHRM char driver removed\n"); +} + +#ifdef CONFIG_HIGH_RES_TIMERS +static enum hrtimer_restart callback(struct hrtimer *timer) +{ + return HRTIMER_NORESTART; +} +#endif + + +static int __init shrm_probe(struct platform_device *pdev) +{ + int err = 0; + struct resource *res; + struct shrm_dev *shrm = NULL; + + if (pdev == NULL) { + dev_err(shrm->dev, + "No device/platform_data found on shm device\n"); + return -ENODEV; + } + + + shrm = kzalloc(sizeof(struct shrm_dev), GFP_KERNEL); + if (shrm == NULL) { + dev_err(shrm->dev, + "Could not allocate memory for struct shm_dev\n"); + return -ENOMEM; + } + shrm->dev = &pdev->dev; + + /* initialise the SHM */ + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(shrm->dev, "Unable to map Ca Wake up interrupt\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_wake_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_common IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_0_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); + if (!res) { + dev_err(shrm->dev, + "Unable to map APE_Read_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ac_read_notif_1_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 3); + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_common IRQbase\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_0_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 4); + if (!res) { + dev_err(shrm->dev, + "Unable to map Cmt_msg_pending_notif_audio IRQ base\n"); + err = -EBUSY; + goto rollback_intr; + } + shrm->ca_msg_pending_notif_1_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(shrm->dev, + "Could not get SHM IO memory information\n"); + err = -ENODEV; + goto rollback_intr; + } + + shrm->intr_base = (void __iomem *)ioremap_nocache(res->start, + res->end - res->start + 1); + + if (!(shrm->intr_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_intr; + } + + shrm->ape_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_COMMON_BASE; + shrm->ape_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_APE_COMMON_BASE, + SHM_FIFO_0_SIZE); + shrm->ape_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->ape_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_common_fifo_base; + } + + shrm->cmt_common_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_COMMON_BASE; + + shrm->cmt_common_fifo_base = + (void __iomem *)ioremap_nocache( + U8500_SHM_FIFO_CMT_COMMON_BASE, SHM_FIFO_0_SIZE); + shrm->cmt_common_fifo_size = (SHM_FIFO_0_SIZE)/4; + + if (!(shrm->cmt_common_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_common_fifo_base; + } + + shrm->ape_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_APE_AUDIO_BASE; + shrm->ape_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_APE_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->ape_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->ape_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ape_audio_fifo_base; + } + + shrm->cmt_audio_fifo_base_phy = + (u32 *)U8500_SHM_FIFO_CMT_AUDIO_BASE; + shrm->cmt_audio_fifo_base = + (void __iomem *)ioremap_nocache(U8500_SHM_FIFO_CMT_AUDIO_BASE, + SHM_FIFO_1_SIZE); + shrm->cmt_audio_fifo_size = (SHM_FIFO_1_SIZE)/4; + + if (!(shrm->cmt_audio_fifo_base)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_cmt_audio_fifo_base; + } + + shrm->ac_common_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_ac_common_shared_wptr; + } + + shrm->ac_common_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ca_common_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + shrm->ca_common_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_0_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_common_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ac_audio_shared_wptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ac_audio_shared_rptr = + (void __iomem *)ioremap(SHM_ACFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ac_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ca_audio_shared_wptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_WRITE_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_wptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + shrm->ca_audio_shared_rptr = + (void __iomem *)ioremap(SHM_CAFIFO_1_READ_AMCU, SHM_PTR_SIZE); + + if (!(shrm->ca_audio_shared_rptr)) { + dev_err(shrm->dev, "Unable to map register base\n"); + err = -EBUSY; + goto rollback_map; + } + + + if (isa_init(shrm) != 0) { + dev_err(shrm->dev, "Driver Initialization Error\n"); + err = -EBUSY; + } + /* install handlers and tasklets */ + if (shm_initialise_irq(shrm)) { + dev_err(shrm->dev, "shm error in interrupt registration\n"); + goto rollback_irq; + } + +#ifdef CONFIG_HIGH_RES_TIMERS + hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer.function = callback; + + hrtimer_start(&timer, ktime_set(0, 2*NSEC_PER_MSEC), HRTIMER_MODE_REL); +#endif + + return err; + +rollback_irq: + free_shm_irq(shrm); +rollback_map: + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); +rollback_ac_common_shared_wptr: + iounmap(shrm->cmt_audio_fifo_base); +rollback_cmt_audio_fifo_base: + iounmap(shrm->ape_audio_fifo_base); +rollback_ape_audio_fifo_base: + iounmap(shrm->cmt_common_fifo_base); +rollback_cmt_common_fifo_base: + iounmap(shrm->ape_common_fifo_base); +rollback_ape_common_fifo_base: + iounmap(shrm->intr_base); +rollback_intr: + kfree(shrm); + return err; +} + +static int __exit shrm_remove(struct platform_device *pdev) +{ + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + free_shm_irq(shrm); + iounmap(shrm->intr_base); + iounmap(shrm->ape_common_fifo_base); + iounmap(shrm->cmt_common_fifo_base); + iounmap(shrm->ape_audio_fifo_base); + iounmap(shrm->cmt_audio_fifo_base); + iounmap(shrm->ac_common_shared_wptr); + iounmap(shrm->ac_common_shared_rptr); + iounmap(shrm->ca_common_shared_wptr); + iounmap(shrm->ca_common_shared_rptr); + iounmap(shrm->ac_audio_shared_wptr); + iounmap(shrm->ac_audio_shared_rptr); + iounmap(shrm->ca_audio_shared_wptr); + iounmap(shrm->ca_audio_shared_rptr); + kfree(shrm); + isa_exit(shrm); + + return 0; +} +#ifdef CONFIG_PM + +/** + * u8500_shrm_suspend() - This routine puts the SHRM in to sustend state. + * @pdev: platform device. + * + * This routine checks the current ongoing communication with Modem by + * examining the ca_wake state and prevents suspend if modem communication + * is on-going. + * If ca_wake = 1 (high), modem comm. is on-going; don't suspend + * If ca_wake = 0 (low), no comm. with modem on-going.Allow suspend + */ +int u8500_shrm_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + dev_dbg(shrm->dev, "%s called...\n", __func__); + dev_dbg(shrm->dev, "\n ca_wake_req_state = %x\n", + get_ca_wake_req_state()); + /* if ca_wake_req is high, prevent system suspend */ + if (get_ca_wake_req_state()) + return -EBUSY; + else + return 0; +} + +/** + * u8500_shrm_resume() - This routine resumes the SHRM from sustend state. + * @pdev: platform device. + * + * This routine restore back the current state of the SHRM + */ +int u8500_shrm_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct shrm_dev *shrm = platform_get_drvdata(pdev); + + dev_dbg(shrm->dev, "%s called...\n", __func__); + /* TODO: + * As of now, no state save takes place in suspend. + * So, nothing to restore in resume. + * Simply return as of now. + * State saved in suspend should be restored here. + */ + + return 0; +} + +static const struct dev_pm_ops shrm_dev_pm_ops = { + .suspend = u8500_shrm_suspend, + .resume = u8500_shrm_resume, +}; +#endif + +static struct platform_driver shrm_driver = { + .remove = __exit_p(shrm_remove), + .driver = { + .name = "u8500_shrm", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &shrm_dev_pm_ops, +#endif + }, +}; + +static int __init shrm_driver_init(void) +{ + return platform_driver_probe(&shrm_driver, shrm_probe); +} + +static void __exit shrm_driver_exit(void) +{ + platform_driver_unregister(&shrm_driver); +} + +module_init(shrm_driver_init); +module_exit(shrm_driver_exit); + +MODULE_AUTHOR("Biju Das"); +MODULE_DESCRIPTION("Shared Memory Modem Driver Interface"); +MODULE_LICENSE("GPL"); diff --git a/drivers/modem/shrm/shrm_fifo.c b/drivers/modem/shrm/shrm_fifo.c new file mode 100644 index 00000000000..883966d4ab5 --- /dev/null +++ b/drivers/modem/shrm/shrm_fifo.c @@ -0,0 +1,827 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include + +#define L1_BOOT_INFO_REQ 1 +#define L1_BOOT_INFO_RESP 2 +#define L1_NORMAL_MSG 3 +#define L1_HEADER_MASK 28 +#define L1_MAPID_MASK 0xF0000000 +#define CONFIG_OFFSET 8 +#define COUNTER_OFFSET 20 +#define L2_HEADER_SIZE 4 +#define L2_HEADER_OFFSET 24 +#define MASK_0_15_BIT 0xFF +#define MASK_16_31_BIT 0xFF00 +#define MASK_16_27_BIT 0xFFF0000 +#define MASK_0_39_BIT 0xFFFFF +#define MASK_40_55_BIT 0xFF00000 +#define MASK_8_16_BIT 0x0000FF00 +#define MSG_LEN_OFFSET 16 +#define SHRM_VER 2 +#define ca_ist_inactivity_timer 100 /*100ms */ +#define ca_csc_inactivity_timer 100 /*100ms */ + +static u8 msg_audio_counter; +static u8 msg_common_counter; + +struct fifo_write_params ape_shm_fifo_0; +struct fifo_write_params ape_shm_fifo_1; +struct fifo_read_params cmt_shm_fifo_0; +struct fifo_read_params cmt_shm_fifo_1; + + +static u8 cmt_read_notif_0_send; +static u8 cmt_read_notif_1_send; + +void shm_fifo_init(struct shrm_dev *shrm) +{ + ape_shm_fifo_0.writer_local_wptr = 0; + ape_shm_fifo_0.writer_local_rptr = 0; + *((u32 *)shrm->ac_common_shared_wptr) = 0; + *((u32 *)shrm->ac_common_shared_rptr) = 0; + ape_shm_fifo_0.shared_wptr = 0; + ape_shm_fifo_0.shared_rptr = 0; + ape_shm_fifo_0.availablesize = shrm->ape_common_fifo_size; + ape_shm_fifo_0.end_addr_fifo = shrm->ape_common_fifo_size; + ape_shm_fifo_0.fifo_virtual_addr = shrm->ape_common_fifo_base; + spin_lock_init(&ape_shm_fifo_0.fifo_update_lock); + + + cmt_shm_fifo_0.reader_local_rptr = 0; + cmt_shm_fifo_0.reader_local_wptr = 0; + cmt_shm_fifo_0.shared_wptr = + *((u32 *)shrm->ca_common_shared_wptr); + cmt_shm_fifo_0.shared_rptr = + *((u32 *)shrm->ca_common_shared_rptr); + cmt_shm_fifo_0.availablesize = shrm->cmt_common_fifo_size; + cmt_shm_fifo_0.end_addr_fifo = shrm->cmt_common_fifo_size; + cmt_shm_fifo_0.fifo_virtual_addr = shrm->cmt_common_fifo_base; + + ape_shm_fifo_1.writer_local_wptr = 0; + ape_shm_fifo_1.writer_local_rptr = 0; + ape_shm_fifo_1.shared_wptr = 0; + ape_shm_fifo_1.shared_rptr = 0; + *((u32 *)shrm->ac_audio_shared_wptr) = 0; + *((u32 *)shrm->ac_audio_shared_rptr) = 0; + ape_shm_fifo_1.availablesize = shrm->ape_audio_fifo_size; + ape_shm_fifo_1.end_addr_fifo = shrm->ape_audio_fifo_size; + ape_shm_fifo_1.fifo_virtual_addr = shrm->ape_audio_fifo_base; + spin_lock_init(&ape_shm_fifo_1.fifo_update_lock); + + cmt_shm_fifo_1.reader_local_rptr = 0; + cmt_shm_fifo_1.reader_local_wptr = 0; + cmt_shm_fifo_1.shared_wptr = + *((u32 *)shrm->ca_audio_shared_wptr); + cmt_shm_fifo_1.shared_rptr = + *((u32 *)shrm->ca_audio_shared_rptr); + cmt_shm_fifo_1.availablesize = shrm->cmt_audio_fifo_size; + cmt_shm_fifo_1.end_addr_fifo = shrm->cmt_audio_fifo_size; + cmt_shm_fifo_1.fifo_virtual_addr = shrm->cmt_audio_fifo_base; + msg_audio_counter = 0; + msg_common_counter = 0; +} + +u8 read_boot_info_req(struct shrm_dev *shrm, + u32 *config, + u32 *version) +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + u32 *msg; + u32 header = 0; + u8 msgtype; + + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->reader_local_rptr + fifo->fifo_virtual_addr); + header = *msg; + msgtype = (header & L1_MAPID_MASK) >> L1_MSG_MAPID_OFFSET; + if (msgtype != L1_BOOT_INFO_REQ) { + dev_err(shrm->dev, "Read_Boot_Info_Req Fatal ERROR\n"); + BUG(); + } + *config = (header >> CONFIG_OFFSET) & MASK_0_15_BIT; + *version = header & MASK_0_15_BIT; + fifo->reader_local_rptr += 1; + + return 1; +} + +void write_boot_info_resp(struct shrm_dev *shrm, u32 config, + u32 version) +{ + struct fifo_write_params *fifo = &ape_shm_fifo_0; + u32 *msg; + u8 msg_length; + version = SHRM_VER; + + spin_lock_bh(&fifo->fifo_update_lock); + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->writer_local_wptr+fifo->fifo_virtual_addr); + if (version < 1) { + *msg = ((L1_BOOT_INFO_RESP << L1_MSG_MAPID_OFFSET) | + ((config << CONFIG_OFFSET) & MASK_16_31_BIT) + | (version & MASK_0_15_BIT)); + msg_length = 1; + } else { + *msg = ((L1_BOOT_INFO_RESP << L1_MSG_MAPID_OFFSET) | + ((0x8 << MSG_LEN_OFFSET) & MASK_16_27_BIT) | + ((config << CONFIG_OFFSET) & MASK_8_16_BIT)| + version); + msg++; + *msg = ca_ist_inactivity_timer; + msg++; + *msg = ca_csc_inactivity_timer; + msg_length = L1_NORMAL_MSG; + } + fifo->writer_local_wptr += msg_length; + fifo->availablesize -= msg_length; + spin_unlock_bh(&fifo->fifo_update_lock); +} + +/** + * shm_write_msg_to_fifo() - write message to FIFO + * @shrm: pointer to shrm device information structure + * @channel: audio or common channel + * @l2header: L2 header or device ID + * @addr: pointer to write buffer address + * @length: length of mst to write + * + * Function Which Writes the data into Fifo in IPC zone + * It is called from shm_write_msg. This function will copy the msg + * from the kernel buffer to FIFO. There are 4 kernel buffers from where + * the data is to copied to FIFO one for each of the messages ISI, RPC, + * AUDIO and SECURITY. ISI, RPC and SECURITY messages are pushed to FIFO + * in commmon channel and AUDIO message is pushed onto audio channel FIFO. + */ +int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, + u8 l2header, void *addr, u32 length) +{ + struct fifo_write_params *fifo = NULL; + u32 l1_header = 0, l2_header = 0; + u32 requiredsize; + u32 size = 0; + u32 *msg; + u8 *src; + + if (channel == COMMON_CHANNEL) + fifo = &ape_shm_fifo_0; + else if (channel == AUDIO_CHANNEL) + fifo = &ape_shm_fifo_1; + else { + dev_err(shrm->dev, "invalid channel\n"); + return -EINVAL; + } + + /* L2 size in 32b */ + requiredsize = ((length + 3) / 4); + /* Add size of L1 & L2 header */ + requiredsize += 2; + + /* if availablesize = or < requiredsize then error */ + if (fifo->availablesize <= requiredsize) { + /* Fatal ERROR - should never happens */ + dev_dbg(shrm->dev, "wr_wptr= %x\n", + fifo->writer_local_wptr); + dev_dbg(shrm->dev, "wr_rptr= %x\n", + fifo->writer_local_rptr); + dev_dbg(shrm->dev, "shared_wptr= %x\n", + fifo->shared_wptr); + dev_dbg(shrm->dev, "shared_rptr= %x\n", + fifo->shared_rptr); + dev_dbg(shrm->dev, "availsize= %x\n", + fifo->availablesize); + dev_dbg(shrm->dev, "end__fifo= %x\n", + fifo->end_addr_fifo); + dev_warn(shrm->dev, "Modem is busy, please wait." + " c_cnt = %d; a_cnt = %d\n", msg_common_counter, + msg_audio_counter); + if (channel == COMMON_CHANNEL) { + dev_warn(shrm->dev, + "Modem is lagging behind in reading." + "Stopping n/w dev queue\n"); + shrm_stop_netdev(shrm->ndev); + } + + return -EAGAIN; + } + + if (channel == COMMON_CHANNEL) { + /* build L1 header */ + l1_header = ((L1_NORMAL_MSG << L1_MSG_MAPID_OFFSET) | + (((msg_common_counter++) << COUNTER_OFFSET) + & MASK_40_55_BIT) | + ((length + L2_HEADER_SIZE) & MASK_0_39_BIT)); + } else if (channel == AUDIO_CHANNEL) { + /* build L1 header */ + l1_header = ((L1_NORMAL_MSG << L1_MSG_MAPID_OFFSET) | + (((msg_audio_counter++) << COUNTER_OFFSET) + & MASK_40_55_BIT) | + ((length + L2_HEADER_SIZE) & MASK_0_39_BIT)); + } + + /* + * Need to take care race condition for fifo->availablesize + * & fifo->writer_local_rptr with Ac_Read_notification interrupt. + * One option could be use stack variable for LocalRptr and recompute + * fifo->availablesize,based on flag enabled in the + * Ac_read_notification + */ + l2_header = ((l2header << L2_HEADER_OFFSET) | + ((length) & MASK_0_39_BIT)); + spin_lock_bh(&fifo->fifo_update_lock); + /* Check Local Rptr is less than or equal to Local WPtr */ + if (fifo->writer_local_rptr <= fifo->writer_local_wptr) { + msg = (u32 *) + (fifo->fifo_virtual_addr+fifo->writer_local_wptr); + + /* check enough place bewteen writer_local_wptr & end of FIFO */ + if ((fifo->end_addr_fifo-fifo->writer_local_wptr) >= + requiredsize) { + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + + /* copy the l2 message in 1 memcpy */ + memcpy((void *)msg, addr, length); + /* UpdateWptr */ + fifo->writer_local_wptr += requiredsize; + fifo->availablesize -= requiredsize; + fifo->writer_local_wptr %= fifo->end_addr_fifo; + } else { + /* + * message is split between and of FIFO and beg of FIFO + * copy first part from writer_local_wptr to end of FIFO + */ + size = fifo->end_addr_fifo-fifo->writer_local_wptr; + + if (size == 1) { + /* Add L1 header */ + *msg = l1_header; + msg++; + /* UpdateWptr */ + fifo->writer_local_wptr = 0; + fifo->availablesize -= size; + /* + * copy second part from beg of FIFO + * with remaining part of msg + */ + msg = (u32 *) + fifo->fifo_virtual_addr; + *msg = l2_header; + msg++; + + /* copy the l3 message in 1 memcpy */ + memcpy((void *)msg, addr, length); + /* UpdateWptr */ + fifo->writer_local_wptr += + requiredsize-size; + fifo->availablesize -= + (requiredsize-size); + } else if (size == 2) { + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + + /* UpdateWptr */ + fifo->writer_local_wptr = 0; + fifo->availablesize -= size; + + /* + * copy second part from beg of FIFO + * with remaining part of msg + */ + msg = (u32 *) + fifo->fifo_virtual_addr; + /* copy the l3 message in 1 memcpy */ + memcpy((void *)msg, addr, length); + + /* UpdateWptr */ + fifo->writer_local_wptr += + requiredsize-size; + fifo->availablesize -= + (requiredsize-size); + } else { + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + + /* copy the l2 message in 1 memcpy */ + memcpy((void *)msg, addr, (size-2)*4); + + + /* UpdateWptr */ + fifo->writer_local_wptr = 0; + fifo->availablesize -= size; + + /* + * copy second part from beg of FIFO + * with remaining part of msg + */ + msg = (u32 *)fifo->fifo_virtual_addr; + src = (u8 *)addr+((size - 2) * 4); + memcpy((void *)msg, src, + (length-((size - 2) * 4))); + + /* UpdateWptr */ + fifo->writer_local_wptr += + requiredsize-size; + fifo->availablesize -= + (requiredsize-size); + } + + } + } else { + /* writer_local_rptr > writer_local_wptr */ + msg = (u32 *) + (fifo->fifo_virtual_addr+fifo->writer_local_wptr); + /* Add L1 header and L2 header */ + *msg = l1_header; + msg++; + *msg = l2_header; + msg++; + /* + * copy message possbile between writer_local_wptr up + * to writer_local_rptr copy the l3 message in 1 memcpy + */ + memcpy((void *)msg, addr, length); + + /* UpdateWptr */ + fifo->writer_local_wptr += requiredsize; + fifo->availablesize -= requiredsize; + + } + spin_unlock_bh(&fifo->fifo_update_lock); + return length; +} + +/** + * read_one_l2msg_common() - read message from common channel + * @shrm: pointer to shrm device information structure + * @l2_msg: pointer to the read L2 message buffer + * @len: message length + * + * This function read one message from the FIFO and returns l2 header type + */ +u8 read_one_l2msg_common(struct shrm_dev *shrm, + u8 *l2_msg, u32 *len) +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + + u32 *msg; + u32 l1_header = 0; + u32 l2_header = 0; + u32 length; + u8 msgtype; + u32 msg_size; + u32 size = 0; + + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->reader_local_rptr+fifo->fifo_virtual_addr); + l1_header = *msg++; + msgtype = (l1_header & 0xF0000000) >> L1_HEADER_MASK; + + if (msgtype != L1_NORMAL_MSG) { + /* Fatal ERROR - should never happens */ + dev_dbg(shrm->dev, "wr_wptr= %x\n", + fifo->reader_local_wptr); + dev_dbg(shrm->dev, "wr_rptr= %x\n", + fifo->reader_local_rptr); + dev_dbg(shrm->dev, "shared_wptr= %x\n", + fifo->shared_wptr); + dev_dbg(shrm->dev, "shared_rptr= %x\n", + fifo->shared_rptr); + dev_dbg(shrm->dev, "availsize= %x\n", + fifo->availablesize); + dev_dbg(shrm->dev, "end_fifo= %x\n", + fifo->end_addr_fifo); + /* Fatal ERROR - should never happens */ + dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); + BUG(); + } + if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { + l2_header = (*((u32 *)fifo->fifo_virtual_addr)); + length = l2_header & MASK_0_39_BIT; + } else { + /* Read L2 header,Msg size & content of reader_local_rptr */ + l2_header = *msg; + length = l2_header & MASK_0_39_BIT; + } + + *len = length; + msg_size = ((length + 3) / 4); + msg_size += 2; + + if (fifo->reader_local_rptr + msg_size <= + fifo->end_addr_fifo) { + /* Skip L2 header */ + msg++; + + /* read msg between reader_local_rptr and end of FIFO */ + memcpy((void *)l2_msg, (void *)msg, length); + /* UpdateLocalRptr */ + fifo->reader_local_rptr += msg_size; + fifo->reader_local_rptr %= fifo->end_addr_fifo; + } else { + /* + * msg split between end of FIFO and beg copy first + * part of msg read msg between reader_local_rptr + * and end of FIFO + */ + size = fifo->end_addr_fifo-fifo->reader_local_rptr; + if (size == 1) { + msg = (u32 *)(fifo->fifo_virtual_addr); + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)(msg), length); + } else if (size == 2) { + /* Skip L2 header */ + msg++; + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, + (void *)(msg), length); + } else { + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)msg, ((size - 2) * 4)); + /* copy second part of msg */ + l2_msg += ((size - 2) * 4); + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, (void *)(msg), + (length-((size - 2) * 4))); + } + fifo->reader_local_rptr = + (fifo->reader_local_rptr+msg_size) % + fifo->end_addr_fifo; + } + return (l2_header>>L2_HEADER_OFFSET) & MASK_0_15_BIT; + } + +u8 read_remaining_messages_common() +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + /* + * There won't be any Race condition reader_local_rptr & + * fifo->reader_local_wptr with CaMsgpending Notification Interrupt + */ + return ((fifo->reader_local_rptr != fifo->reader_local_wptr) ? 1 : 0); +} + +u8 read_one_l2msg_audio(struct shrm_dev *shrm, + u8 *l2_msg, u32 *len) +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_1; + + u32 *msg; + u32 l1_header = 0; + u32 l2_header = 0; + u32 length; + u8 msgtype; + u32 msg_size; + u32 size = 0; + + /* Read L1 header read content of reader_local_rptr */ + msg = (u32 *) + (fifo->reader_local_rptr+fifo->fifo_virtual_addr); + l1_header = *msg++; + msgtype = (l1_header & 0xF0000000) >> L1_HEADER_MASK; + + if (msgtype != L1_NORMAL_MSG) { + /* Fatal ERROR - should never happens */ + dev_dbg(shrm->dev, "wr_local_wptr= %x\n", + fifo->reader_local_wptr); + dev_dbg(shrm->dev, "wr_local_rptr= %x\n", + fifo->reader_local_rptr); + dev_dbg(shrm->dev, "shared_wptr= %x\n", + fifo->shared_wptr); + dev_dbg(shrm->dev, "shared_rptr= %x\n", + fifo->shared_rptr); + dev_dbg(shrm->dev, "availsize=%x\n", + fifo->availablesize); + dev_dbg(shrm->dev, "end_fifo= %x\n", + fifo->end_addr_fifo); + /* Fatal ERROR - should never happens */ + dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); + BUG(); + } + if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { + l2_header = (*((u32 *)fifo->fifo_virtual_addr)); + length = l2_header & MASK_0_39_BIT; + } else { + /* Read L2 header,Msg size & content of reader_local_rptr */ + l2_header = *msg; + length = l2_header & MASK_0_39_BIT; + } + + *len = length; + msg_size = ((length + 3) / 4); + msg_size += 2; + + if (fifo->reader_local_rptr + msg_size <= + fifo->end_addr_fifo) { + /* Skip L2 header */ + msg++; + /* read msg between reader_local_rptr and end of FIFO */ + memcpy((void *)l2_msg, (void *)msg, length); + /* UpdateLocalRptr */ + fifo->reader_local_rptr += msg_size; + fifo->reader_local_rptr %= fifo->end_addr_fifo; + } else { + + /* + * msg split between end of FIFO and beg + * copy first part of msg + * read msg between reader_local_rptr and end of FIFO + */ + size = fifo->end_addr_fifo-fifo->reader_local_rptr; + if (size == 1) { + msg = (u32 *)(fifo->fifo_virtual_addr); + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)(msg), length); + } else if (size == 2) { + /* Skip L2 header */ + msg++; + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, (void *)(msg), length); + } else { + /* Skip L2 header */ + msg++; + memcpy((void *)l2_msg, (void *)msg, ((size - 2) * 4)); + /* copy second part of msg */ + l2_msg += ((size - 2) * 4); + msg = (u32 *)(fifo->fifo_virtual_addr); + memcpy((void *)l2_msg, (void *)(msg), + (length-((size - 2) * 4))); + } + fifo->reader_local_rptr = + (fifo->reader_local_rptr+msg_size) % + fifo->end_addr_fifo; + + } + return (l2_header>>L2_HEADER_OFFSET) & MASK_0_15_BIT; + } + +u8 read_remaining_messages_audio() +{ + struct fifo_read_params *fifo = &cmt_shm_fifo_1; + + return ((fifo->reader_local_rptr != fifo->reader_local_wptr) ? + 1 : 0); +} + +u8 is_the_only_one_unread_message(struct shrm_dev *shrm, + u8 channel, u32 length) +{ + struct fifo_write_params *fifo = NULL; + u32 messagesize = 0; + u8 is_only_one_unread_msg = 0; + + if (channel == COMMON_CHANNEL) + fifo = &ape_shm_fifo_0; + else /* channel = AUDIO_CHANNEL */ + fifo = &ape_shm_fifo_1; + + /* L3 size in 32b */ + messagesize = ((length + 3) / 4); + /* Add size of L1 & L2 header */ + messagesize += 2; + /* + * possibility of race condition with Ac Read notification interrupt. + * need to check ? + */ + if (fifo->writer_local_wptr > fifo->writer_local_rptr) + is_only_one_unread_msg = + ((fifo->writer_local_rptr + messagesize) == + fifo->writer_local_wptr) ? 1 : 0; + else + /* Msg split between end of fifo and starting of Fifo */ + is_only_one_unread_msg = + (((fifo->writer_local_rptr + messagesize) % + fifo->end_addr_fifo) == fifo->writer_local_wptr) ? + 1 : 0; + + return is_only_one_unread_msg; +} + +void update_ca_common_local_wptr(struct shrm_dev *shrm) +{ + /* + * update CA common reader local write pointer with the + * shared write pointer + */ + struct fifo_read_params *fifo = &cmt_shm_fifo_0; + + fifo->shared_wptr = + (*((u32 *)shrm->ca_common_shared_wptr)); + fifo->reader_local_wptr = fifo->shared_wptr; +} + +void update_ca_audio_local_wptr(struct shrm_dev *shrm) +{ + /* + * update CA audio reader local write pointer with the + * shared write pointer + */ + struct fifo_read_params *fifo = &cmt_shm_fifo_1; + + fifo->shared_wptr = + (*((u32 *)shrm->ca_audio_shared_wptr)); + fifo->reader_local_wptr = fifo->shared_wptr; +} + +void update_ac_common_local_rptr(struct shrm_dev *shrm) +{ + /* + * update AC common writer local read pointer with the + * shared read pointer + */ + struct fifo_write_params *fifo; + u32 free_space = 0; + + fifo = &ape_shm_fifo_0; + + spin_lock_bh(&fifo->fifo_update_lock); + fifo->shared_rptr = + (*((u32 *)shrm->ac_common_shared_rptr)); + + if (fifo->shared_rptr >= fifo->writer_local_rptr) + free_space = + (fifo->shared_rptr-fifo->writer_local_rptr); + else { + free_space = + (fifo->end_addr_fifo-fifo->writer_local_rptr); + free_space += fifo->shared_rptr; + } + + /* Chance of race condition of below variables with write_msg */ + fifo->availablesize += free_space; + fifo->writer_local_rptr = fifo->shared_rptr; + spin_unlock_bh(&fifo->fifo_update_lock); +} + +void update_ac_audio_local_rptr(struct shrm_dev *shrm) +{ + /* + * update AC audio writer local read pointer with the + * shared read pointer + */ + struct fifo_write_params *fifo; + u32 free_space = 0; + + fifo = &ape_shm_fifo_1; + spin_lock_bh(&fifo->fifo_update_lock); + fifo->shared_rptr = + (*((u32 *)shrm->ac_audio_shared_rptr)); + + if (fifo->shared_rptr >= fifo->writer_local_rptr) + free_space = + (fifo->shared_rptr-fifo->writer_local_rptr); + else { + free_space = + (fifo->end_addr_fifo-fifo->writer_local_rptr); + free_space += fifo->shared_rptr; + } + + /* Chance of race condition of below variables with write_msg */ + fifo->availablesize += free_space; + fifo->writer_local_rptr = fifo->shared_rptr; + spin_unlock_bh(&fifo->fifo_update_lock); +} + +void update_ac_common_shared_wptr(struct shrm_dev *shrm) +{ + /* + * update AC common shared write pointer with the + * local write pointer + */ + struct fifo_write_params *fifo; + + fifo = &ape_shm_fifo_0; + spin_lock_bh(&fifo->fifo_update_lock); + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ac_common_shared_wptr)) = + fifo->writer_local_wptr; + + fifo->shared_wptr = fifo->writer_local_wptr; + spin_unlock_bh(&fifo->fifo_update_lock); +} + +void update_ac_audio_shared_wptr(struct shrm_dev *shrm) +{ + /* + * update AC audio shared write pointer with the + * local write pointer + */ + struct fifo_write_params *fifo; + + fifo = &ape_shm_fifo_1; + spin_lock_bh(&fifo->fifo_update_lock); + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ac_audio_shared_wptr)) = + fifo->writer_local_wptr; + fifo->shared_wptr = fifo->writer_local_wptr; + spin_unlock_bh(&fifo->fifo_update_lock); +} + +void update_ca_common_shared_rptr(struct shrm_dev *shrm) +{ + /* + * update CA common shared read pointer with the + * local read pointer + */ + struct fifo_read_params *fifo; + + fifo = &cmt_shm_fifo_0; + + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ca_common_shared_rptr)) = + fifo->reader_local_rptr; + fifo->shared_rptr = fifo->reader_local_rptr; +} + +void update_ca_audio_shared_rptr(struct shrm_dev *shrm) +{ + /* + * update CA audio shared read pointer with the + * local read pointer + */ + struct fifo_read_params *fifo; + + fifo = &cmt_shm_fifo_1; + + /* Update shared pointer fifo offset of the IPC zone */ + (*((u32 *)shrm->ca_audio_shared_rptr)) = + fifo->reader_local_rptr; + fifo->shared_rptr = fifo->reader_local_rptr; +} + +void get_reader_pointers(u8 channel_type, u32 *reader_local_rptr, + u32 *reader_local_wptr, u32 *shared_rptr) +{ + struct fifo_read_params *fifo = NULL; + + if (channel_type == COMMON_CHANNEL) + fifo = &cmt_shm_fifo_0; + else /* channel_type = AUDIO_CHANNEL */ + fifo = &cmt_shm_fifo_1; + + *reader_local_rptr = fifo->reader_local_rptr; + *reader_local_wptr = fifo->reader_local_wptr; + *shared_rptr = fifo->shared_rptr; +} + +void get_writer_pointers(u8 channel_type, u32 *writer_local_rptr, + u32 *writer_local_wptr, u32 *shared_wptr) +{ + struct fifo_write_params *fifo = NULL; + + if (channel_type == COMMON_CHANNEL) + fifo = &ape_shm_fifo_0; + else /* channel_type = AUDIO_CHANNEL */ + fifo = &ape_shm_fifo_1; + + spin_lock_bh(&fifo->fifo_update_lock); + *writer_local_rptr = fifo->writer_local_rptr; + *writer_local_wptr = fifo->writer_local_wptr; + *shared_wptr = fifo->shared_wptr; + spin_unlock_bh(&fifo->fifo_update_lock); +} + +void set_ca_msg_0_read_notif_send(u8 val) +{ + cmt_read_notif_0_send = val; +} + +u8 get_ca_msg_0_read_notif_send(void) +{ + return cmt_read_notif_0_send; +} + +void set_ca_msg_1_read_notif_send(u8 val) +{ + cmt_read_notif_1_send = val; +} + +u8 get_ca_msg_1_read_notif_send(void) +{ + return cmt_read_notif_1_send; +} diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c new file mode 100644 index 00000000000..99a58aa6f71 --- /dev/null +++ b/drivers/modem/shrm/shrm_protocol.c @@ -0,0 +1,1191 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghvi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define L2_HEADER_ISI 0x0 +#define L2_HEADER_RPC 0x1 +#define L2_HEADER_AUDIO 0x2 +#define L2_HEADER_SECURITY 0x3 +#define L2_HEADER_COMMON_SIMPLE_LOOPBACK 0xC0 +#define L2_HEADER_COMMON_ADVANCED_LOOPBACK 0xC1 +#define L2_HEADER_AUDIO_SIMPLE_LOOPBACK 0x80 +#define L2_HEADER_AUDIO_ADVANCED_LOOPBACK 0x81 +#define MAX_PAYLOAD 1024 + +static u8 boot_state = BOOT_INIT; +static u8 recieve_common_msg[8*1024]; +static u8 recieve_audio_msg[8*1024]; +static received_msg_handler rx_common_handler; +static received_msg_handler rx_audio_handler; +static struct hrtimer timer; +struct sock *shrm_nl_sk; + +static char shrm_common_tx_state = SHRM_SLEEP_STATE; +static char shrm_common_rx_state = SHRM_SLEEP_STATE; +static char shrm_audio_tx_state = SHRM_SLEEP_STATE; +static char shrm_audio_rx_state = SHRM_SLEEP_STATE; + +static atomic_t ac_sleep_disable_count = ATOMIC_INIT(0); +static struct shrm_dev *shm_dev; + +/* Spin lock and tasklet declaration */ +DECLARE_TASKLET(shm_ca_0_tasklet, shm_ca_msgpending_0_tasklet, 0); +DECLARE_TASKLET(shm_ca_1_tasklet, shm_ca_msgpending_1_tasklet, 0); +DECLARE_TASKLET(shm_ac_read_0_tasklet, shm_ac_read_notif_0_tasklet, 0); +DECLARE_TASKLET(shm_ac_read_1_tasklet, shm_ac_read_notif_1_tasklet, 0); + +static DEFINE_MUTEX(ac_state_mutex); + +static DEFINE_SPINLOCK(ca_common_lock); +static DEFINE_SPINLOCK(ca_audio_lock); +static DEFINE_SPINLOCK(ca_wake_req_lock); +static DEFINE_SPINLOCK(boot_lock); + +enum shrm_nl { + SHRM_NL_MOD_RESET = 1, + SHRM_NL_MOD_QUERY_STATE, + SHRM_NL_USER_MOD_RESET, + SHRM_NL_STATUS_MOD_ONLINE, + SHRM_NL_STATUS_MOD_OFFLINE, +}; + +static void shm_ac_sleep_req_work(struct work_struct *work) +{ + mutex_lock(&ac_state_mutex); + if (atomic_read(&ac_sleep_disable_count) == 0) + modem_release(shm_dev->modem); + mutex_unlock(&ac_state_mutex); +} + +static void shm_ac_wake_req_work(struct work_struct *work) +{ + mutex_lock(&ac_state_mutex); + modem_request(shm_dev->modem); + mutex_unlock(&ac_state_mutex); +} + +static u32 get_host_accessport_val(void) +{ + u32 prcm_hostaccess; + + prcm_hostaccess = readl(PRCM_HOSTACCESS_REQ); + wmb(); + prcm_hostaccess = prcm_hostaccess & 0x01; + + return prcm_hostaccess; +} +static enum hrtimer_restart callback(struct hrtimer *timer) +{ + unsigned long flags; + + spin_lock_irqsave(&ca_wake_req_lock, flags); + if (((shrm_common_rx_state == SHRM_IDLE) || + (shrm_common_rx_state == SHRM_SLEEP_STATE)) + && ((shrm_common_tx_state == SHRM_IDLE) || + (shrm_common_tx_state == SHRM_SLEEP_STATE)) + && ((shrm_audio_rx_state == SHRM_IDLE) || + (shrm_audio_rx_state == SHRM_SLEEP_STATE)) + && ((shrm_audio_tx_state == SHRM_IDLE) || + (shrm_audio_tx_state == SHRM_SLEEP_STATE))) { + + shrm_common_rx_state = SHRM_SLEEP_STATE; + shrm_audio_rx_state = SHRM_SLEEP_STATE; + shrm_common_tx_state = SHRM_SLEEP_STATE; + shrm_audio_tx_state = SHRM_SLEEP_STATE; + + queue_work(shm_dev->shm_ac_sleep_wq, + &shm_dev->shm_ac_sleep_req); + + } + spin_unlock_irqrestore(&ca_wake_req_lock, flags); + + return HRTIMER_NORESTART; +} + +int nl_send_multicast_message(int msg, gfp_t gfp_mask) +{ + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh = NULL; + int err; + + /* prepare netlink message */ + skb = alloc_skb(NLMSG_SPACE(MAX_PAYLOAD), gfp_mask); + if (!skb) { + dev_err(shm_dev->dev, "%s:alloc_skb failed\n", __func__); + err = -ENOMEM; + goto out; + } + + nlh = (struct nlmsghdr *)skb->data; + nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD); + dev_dbg(shm_dev->dev, "nlh->nlmsg_len = %d\n", nlh->nlmsg_len); + + nlh->nlmsg_pid = 0; /* from kernel */ + nlh->nlmsg_flags = 0; + *(int *)NLMSG_DATA(nlh) = msg; + skb_put(skb, MAX_PAYLOAD); + /* sender is in group 1<<0 */ + NETLINK_CB(skb).pid = 0; /* from kernel */ + /* to mcast group 1<<0 */ + NETLINK_CB(skb).dst_group = 1; + + /*multicast the message to all listening processes*/ + err = netlink_broadcast(shrm_nl_sk, skb, 0, 1, gfp_mask); + dev_dbg(shm_dev->dev, "ret val from nl-multicast = %d\n", err); + +out: + return err; +} + +static void nl_send_unicast_message(int dst_pid) +{ + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh = NULL; + int err; + int bt_state; + unsigned long flags; + + dev_info(shm_dev->dev, "Sending unicast message\n"); + + /* prepare the NL message for unicast */ + skb = alloc_skb(NLMSG_SPACE(MAX_PAYLOAD), GFP_KERNEL); + if (!skb) { + dev_err(shm_dev->dev, "%s:alloc_skb failed\n", __func__); + return; + } + + nlh = (struct nlmsghdr *)skb->data; + nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD); + dev_dbg(shm_dev->dev, "nlh->nlmsg_len = %d\n", nlh->nlmsg_len); + + nlh->nlmsg_pid = 0; /* from kernel */ + nlh->nlmsg_flags = 0; + + spin_lock_irqsave(&boot_lock, flags); + bt_state = boot_state; + spin_unlock_irqrestore(&boot_lock, flags); + + if (bt_state == BOOT_DONE) + *(int *)NLMSG_DATA(nlh) = SHRM_NL_STATUS_MOD_ONLINE; + else + *(int *)NLMSG_DATA(nlh) = SHRM_NL_STATUS_MOD_OFFLINE; + + skb_put(skb, MAX_PAYLOAD); + /* sender is in group 1<<0 */ + NETLINK_CB(skb).pid = 0; /* from kernel */ + NETLINK_CB(skb).dst_group = 0; + + /*unicast the message to the querying processes*/ + err = netlink_unicast(shrm_nl_sk, skb, dst_pid, MSG_DONTWAIT); + dev_dbg(shm_dev->dev, "ret val from nl-unicast = %d\n", err); +} + + +static int check_modem_in_reset(void) +{ + u8 bt_state; + unsigned long flags; + + spin_lock_irqsave(&boot_lock, flags); + bt_state = boot_state; + spin_unlock_irqrestore(&boot_lock, flags); + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET + if (bt_state != BOOT_UNKNOWN) + return 0; + else + return -ENODEV; +#else + /* + * this check won't be applicable and won't work correctly + * if modem-silent-feature is not enabled + * so, simply return 0 + */ + return 0; +#endif +} + +void shm_ca_msgpending_0_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 reader_local_rptr; + u32 reader_local_wptr; + u32 shared_rptr; + u32 config = 0, version = 0; + unsigned long flags; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + /* Interprocess locking */ + spin_lock(&ca_common_lock); + + /* Update_reader_local_wptr with shared_wptr */ + update_ca_common_local_wptr(shrm); + get_reader_pointers(COMMON_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + + set_ca_msg_0_read_notif_send(0); + + if (boot_state == BOOT_DONE) { + shrm_common_rx_state = SHRM_PTR_FREE; + + if (reader_local_rptr != shared_rptr) + ca_msg_read_notification_0(shrm); + if (reader_local_rptr != reader_local_wptr) + receive_messages_common(shrm); + get_reader_pointers(COMMON_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + if (reader_local_rptr == reader_local_wptr) + shrm_common_rx_state = SHRM_IDLE; + } else { + /* BOOT phase.only a BOOT_RESP should be in FIFO */ + if (boot_state != BOOT_INFO_SYNC) { + if (!read_boot_info_req(shrm, &config, &version)) { + dev_err(shrm->dev, + "Unable to read boot state\n"); + BUG(); + } + /* SendReadNotification */ + ca_msg_read_notification_0(shrm); + /* + * Check the version number before + * sending Boot info response + */ + + /* send MsgPending notification */ + write_boot_info_resp(shrm, config, version); + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_INFO_SYNC; + spin_unlock_irqrestore(&boot_lock, flags); + dev_info(shrm->dev, "BOOT_INFO_SYNC\n"); + queue_work(shrm->shm_common_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_0); + } else { + ca_msg_read_notification_0(shrm); + dev_info(shrm->dev, + "BOOT_INFO_SYNC\n"); + } + } + /* Interprocess locking */ + spin_unlock(&ca_common_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ca_msgpending_1_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 reader_local_rptr; + u32 reader_local_wptr; + u32 shared_rptr; + + /* + * This function is called when CaMsgPendingNotification Trigerred + * by CMU. It means that CMU has wrote a message into Ca Audio FIFO + */ + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown\n", + __func__); + return; + } + + /* Interprocess locking */ + spin_lock(&ca_audio_lock); + + /* Update_reader_local_wptr(with shared_wptr) */ + update_ca_audio_local_wptr(shrm); + get_reader_pointers(AUDIO_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + + set_ca_msg_1_read_notif_send(0); + + if (boot_state != BOOT_DONE) { + dev_err(shrm->dev, "Boot Error\n"); + return; + } + shrm_audio_rx_state = SHRM_PTR_FREE; + /* Check we already read the message */ + if (reader_local_rptr != shared_rptr) + ca_msg_read_notification_1(shrm); + if (reader_local_rptr != reader_local_wptr) + receive_messages_audio(shrm); + + get_reader_pointers(AUDIO_CHANNEL, &reader_local_rptr, + &reader_local_wptr, &shared_rptr); + if (reader_local_rptr == reader_local_wptr) + shrm_audio_rx_state = SHRM_IDLE; + + /* Interprocess locking */ + spin_unlock(&ca_audio_lock); + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ac_read_notif_0_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 writer_local_rptr; + u32 writer_local_wptr; + u32 shared_wptr; + unsigned long flags; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + /* Update writer_local_rptrwith shared_rptr */ + update_ac_common_local_rptr(shrm); + get_writer_pointers(COMMON_CHANNEL, &writer_local_rptr, + &writer_local_wptr, &shared_wptr); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown\n", + __func__); + return; + } + + if (boot_state == BOOT_INFO_SYNC) { + /* BOOT_RESP sent by APE has been received by CMT */ + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_DONE; + spin_unlock_irqrestore(&boot_lock, flags); + dev_info(shrm->dev, "IPC_ISA BOOT_DONE\n"); + + if (shrm->msr_flag) { + shrm_start_netdev(shrm->ndev); + shrm->msr_flag = 0; + + /* multicast that modem is online */ + nl_send_multicast_message(SHRM_NL_STATUS_MOD_ONLINE, + GFP_ATOMIC); + } + + } else if (boot_state == BOOT_DONE) { + if (writer_local_rptr != writer_local_wptr) { + shrm_common_tx_state = SHRM_PTR_FREE; + queue_work(shrm->shm_common_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_0); + } else { + shrm_common_tx_state = SHRM_IDLE; + shrm_restart_netdev(shrm->ndev); + } + } else { + dev_err(shrm->dev, "Invalid boot state\n"); + } + /* start timer here */ + hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), + HRTIMER_MODE_REL); + atomic_dec(&ac_sleep_disable_count); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ac_read_notif_1_tasklet(unsigned long tasklet_data) +{ + struct shrm_dev *shrm = (struct shrm_dev *)tasklet_data; + u32 writer_local_rptr; + u32 writer_local_wptr; + u32 shared_wptr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown\n", + __func__); + return; + } + + /* Update writer_local_rptr(with shared_rptr) */ + update_ac_audio_local_rptr(shrm); + get_writer_pointers(AUDIO_CHANNEL, &writer_local_rptr, + &writer_local_wptr, &shared_wptr); + if (boot_state != BOOT_DONE) { + dev_err(shrm->dev, "Error Case in boot state\n"); + return; + } + if (writer_local_rptr != writer_local_wptr) { + shrm_audio_tx_state = SHRM_PTR_FREE; + queue_work(shrm->shm_audio_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_1); + } else { + shrm_audio_tx_state = SHRM_IDLE; + } + /* start timer here */ + hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), + HRTIMER_MODE_REL); + atomic_dec(&ac_sleep_disable_count); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_ca_sleep_req_work(struct work_struct *work) +{ + dev_dbg(shm_dev->dev, "%s:IRQ_PRCMU_CA_SLEEP\n", __func__); + + shrm_common_rx_state = SHRM_IDLE; + shrm_audio_rx_state = SHRM_IDLE; + + writel((1<intr_base + GOP_SET_REGISTER_BASE); + + hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), + HRTIMER_MODE_REL); +#ifdef CONFIG_UX500_SUSPEND + suspend_unblock_sleep(); +#endif + atomic_dec(&ac_sleep_disable_count); +} + +void shm_ca_wake_req_work(struct work_struct *work) +{ + struct shrm_dev *shrm = container_of(work, + struct shrm_dev, shm_ca_wake_req); + + /* initialize the FIFO Variables */ + if (boot_state == BOOT_INIT) + shm_fifo_init(shrm); + + mutex_lock(&ac_state_mutex); + modem_request(shrm->modem); + mutex_unlock(&ac_state_mutex); + + /* send ca_wake_ack_interrupt to CMU */ + if (!get_host_accessport_val()) + BUG(); + writel((1<intr_base + GOP_SET_REGISTER_BASE); +} +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET +static int shrm_modem_reset_sequence(void) +{ + int err; + unsigned long flags; + + /* + * disable irqs + * very much needed for user-space initiated + * modem-reset + */ + disable_irq_nosync(shm_dev->ac_read_notif_0_irq); + disable_irq_nosync(shm_dev->ac_read_notif_1_irq); + disable_irq_nosync(shm_dev->ca_msg_pending_notif_0_irq); + disable_irq_nosync(shm_dev->ca_msg_pending_notif_1_irq); + disable_irq_nosync(IRQ_PRCMU_CA_WAKE); + disable_irq_nosync(IRQ_PRCMU_CA_SLEEP); + + + /* update the boot_state */ + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_UNKNOWN; + + /* + * put a barrier over here to make sure boot_state is updated + * else, it is seen that some of already executing modem + * irqs or tasklets fail the protocol checks and will ultimately + * try to acces the modem causing system to hang. + * This is particularly seen with user-space initiated modem reset + */ + wmb(); + spin_unlock_irqrestore(&boot_lock, flags); + + hrtimer_cancel(&timer); + + /* + * keep the count to 0 so that we can bring down the line + * for normal ac-wake and ac-sleep logic + */ + atomic_set(&ac_sleep_disable_count, 0); + + /* workaround for MSR */ + queue_work(shm_dev->shm_ac_wake_wq, + &shm_dev->shm_ac_wake_req); + + /* stop network queue */ + shrm_stop_netdev(shm_dev->ndev); + + /* reset char device queues */ + shrm_char_reset_queues(shm_dev); + + /* reset protocol states */ + shrm_common_tx_state = SHRM_SLEEP_STATE; + shrm_common_rx_state = SHRM_SLEEP_STATE; + shrm_audio_tx_state = SHRM_SLEEP_STATE; + shrm_audio_rx_state = SHRM_SLEEP_STATE; + + /* set the msr flag */ + shm_dev->msr_flag = 1; + + /* multicast that modem is going to reset */ + err = nl_send_multicast_message(SHRM_NL_MOD_RESET, GFP_ATOMIC); + + /* reset the boot state */ + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_INIT; + spin_unlock_irqrestore(&boot_lock, flags); + + /* re-enable irqs */ + enable_irq(shm_dev->ac_read_notif_0_irq); + enable_irq(shm_dev->ac_read_notif_1_irq); + enable_irq(shm_dev->ca_msg_pending_notif_0_irq); + enable_irq(shm_dev->ca_msg_pending_notif_1_irq); + enable_irq(IRQ_PRCMU_CA_WAKE); + enable_irq(IRQ_PRCMU_CA_SLEEP); + + return err; +} +#endif + +static void shrm_modem_reset_callback(unsigned long irq) +{ + dev_err(shm_dev->dev, "Received mod_reset_req interrupt\n"); + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET + { + int err; + dev_info(shm_dev->dev, "Initiating Modem silent reset\n"); + + err = shrm_modem_reset_sequence(); + if (err) + dev_err(shm_dev->dev, + "Failed multicast of modem reset\n"); + } +#else + dev_info(shm_dev->dev, "Modem in reset loop, doing System reset\n"); + + /* Call the PRCMU reset API */ + prcmu_system_reset(SW_RESET_NO_ARGUMENT); +#endif +} + +DECLARE_TASKLET(shrm_sw_reset_callback, shrm_modem_reset_callback, + IRQ_PRCMU_MODEM_SW_RESET_REQ); + +static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) +{ + struct shrm_dev *shrm = data; + + switch (irq) { + case IRQ_PRCMU_CA_WAKE: +#ifdef CONFIG_UX500_SUSPEND + suspend_block_sleep(); +#endif + if (shrm->msr_flag) + atomic_set(&ac_sleep_disable_count, 0); + atomic_inc(&ac_sleep_disable_count); + queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_wake_req); + break; + case IRQ_PRCMU_CA_SLEEP: + queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_sleep_req); + break; + case IRQ_PRCMU_MODEM_SW_RESET_REQ: + tasklet_schedule(&shrm_sw_reset_callback); + break; + default: + dev_err(shrm->dev, "%s: => IRQ %d\n", __func__, irq); + return IRQ_NONE; + } + return IRQ_HANDLED; +} + +static void send_ac_msg_pend_notify_0_work(struct work_struct *work) +{ + struct shrm_dev *shrm = container_of(work, struct shrm_dev, + send_ac_msg_pend_notify_0); + + dev_dbg(shrm->dev, "%s IN\n", __func__); + update_ac_common_shared_wptr(shrm); + + mutex_lock(&ac_state_mutex); + atomic_inc(&ac_sleep_disable_count); + modem_request(shrm->modem); + mutex_unlock(&ac_state_mutex); + + if (!get_host_accessport_val()) + BUG(); + + /* Trigger AcMsgPendingNotification to CMU */ + writel((1<intr_base + GOP_SET_REGISTER_BASE); + + if (shrm_common_tx_state == SHRM_PTR_FREE) + shrm_common_tx_state = SHRM_PTR_BUSY; + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +static void send_ac_msg_pend_notify_1_work(struct work_struct *work) +{ + struct shrm_dev *shrm = container_of(work, struct shrm_dev, + send_ac_msg_pend_notify_1); + + dev_dbg(shrm->dev, "%s IN\n", __func__); + /* Update shared_wptr with writer_local_wptr) */ + update_ac_audio_shared_wptr(shrm); + + mutex_lock(&ac_state_mutex); + atomic_inc(&ac_sleep_disable_count); + modem_request(shrm->modem); + mutex_unlock(&ac_state_mutex); + + if (!get_host_accessport_val()) + BUG(); + + /* Trigger AcMsgPendingNotification to CMU */ + writel((1<intr_base + GOP_SET_REGISTER_BASE); + + if (shrm_audio_tx_state == SHRM_PTR_FREE) + shrm_audio_tx_state = SHRM_PTR_BUSY; + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void shm_nl_receive(struct sk_buff *skb) +{ + struct nlmsghdr *nlh = NULL; + int msg; + + dev_dbg(shm_dev->dev, "Received NL msg from user-space\n"); + + nlh = (struct nlmsghdr *)skb->data; + msg = *((int *)(NLMSG_DATA(nlh))); + switch (msg) { + case SHRM_NL_MOD_QUERY_STATE: + dev_info(shm_dev->dev, "mod-query-state from user-space\n"); + nl_send_unicast_message(nlh->nlmsg_pid); + break; + + case SHRM_NL_USER_MOD_RESET: + dev_info(shm_dev->dev, "user-space inited mod-reset-req\n"); + dev_info(shm_dev->dev, "PCRMU resets modem\n"); + prcmu_modem_reset(); + break; + + default: + dev_err(shm_dev->dev, "Invalid NL msg from user-space\n"); + break; + }; +} + +int shrm_protocol_init(struct shrm_dev *shrm, + received_msg_handler common_rx_handler, + received_msg_handler audio_rx_handler) +{ + int err; + + shm_dev = shrm; + boot_state = BOOT_INIT; + dev_info(shrm->dev, "IPC_ISA BOOT_INIT\n"); + rx_common_handler = common_rx_handler; + rx_audio_handler = audio_rx_handler; + atomic_set(&ac_sleep_disable_count, 0); + + hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + timer.function = callback; + + shrm->shm_common_ch_wr_wq = create_singlethread_workqueue + ("shm_common_channel_irq"); + if (!shrm->shm_common_ch_wr_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + return -ENOMEM; + } + shrm->shm_audio_ch_wr_wq = create_singlethread_workqueue + ("shm_audio_channel_irq"); + if (!shrm->shm_audio_ch_wr_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq1; + } + shrm->shm_ac_wake_wq = create_singlethread_workqueue("shm_ac_wake_req"); + if (!shrm->shm_ac_wake_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq2; + } + shrm->shm_ca_wake_wq = create_singlethread_workqueue("shm_ca_wake_req"); + if (!shrm->shm_ac_wake_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq3; + } + shrm->shm_ac_sleep_wq = create_singlethread_workqueue + ("shm_ac_sleep_req"); + if (!shrm->shm_ac_sleep_wq) { + dev_err(shrm->dev, "failed to create work queue\n"); + err = -ENOMEM; + goto free_wq4; + } + INIT_WORK(&shrm->send_ac_msg_pend_notify_0, + send_ac_msg_pend_notify_0_work); + INIT_WORK(&shrm->send_ac_msg_pend_notify_1, + send_ac_msg_pend_notify_1_work); + INIT_WORK(&shrm->shm_ca_wake_req, shm_ca_wake_req_work); + INIT_WORK(&shrm->shm_ca_sleep_req, shm_ca_sleep_req_work); + INIT_WORK(&shrm->shm_ac_sleep_req, shm_ac_sleep_req_work); + INIT_WORK(&shrm->shm_ac_wake_req, shm_ac_wake_req_work); + + /* set tasklet data */ + shm_ca_0_tasklet.data = (unsigned long)shrm; + shm_ca_1_tasklet.data = (unsigned long)shrm; + + err = request_irq(IRQ_PRCMU_CA_SLEEP, shrm_prcmu_irq_handler, + IRQF_NO_SUSPEND, "ca-sleep", shrm); + if (err < 0) { + dev_err(shm_dev->dev, "Failed alloc IRQ_PRCMU_CA_SLEEP.\n"); + goto free_wq5; + } + + err = request_irq(IRQ_PRCMU_CA_WAKE, shrm_prcmu_irq_handler, + IRQF_NO_SUSPEND, "ca-wake", shrm); + if (err < 0) { + dev_err(shm_dev->dev, "Failed alloc IRQ_PRCMU_CA_WAKE.\n"); + goto drop2; + } + + err = request_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, shrm_prcmu_irq_handler, + IRQF_NO_SUSPEND, "modem-sw-reset-req", shrm); + if (err < 0) { + dev_err(shm_dev->dev, + "Failed alloc IRQ_PRCMU_MODEM_SW_RESET_REQ.\n"); + goto drop1; + } + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET + /* init netlink socket for user-space communication */ + shrm_nl_sk = netlink_kernel_create(NULL, NETLINK_SHRM, 1, + shm_nl_receive, NULL, THIS_MODULE); + + if (!shrm_nl_sk) { + dev_err(shm_dev->dev, "netlink socket creation failed\n"); + goto drop; + } +#endif + return 0; + +#ifdef CONFIG_U8500_SHRM_MODEM_SILENT_RESET +drop: + free_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, NULL); +#endif +drop1: + free_irq(IRQ_PRCMU_CA_WAKE, NULL); +drop2: + free_irq(IRQ_PRCMU_CA_SLEEP, NULL); +free_wq5: + destroy_workqueue(shrm->shm_ac_sleep_wq); +free_wq4: + destroy_workqueue(shrm->shm_ca_wake_wq); +free_wq3: + destroy_workqueue(shrm->shm_ac_wake_wq); +free_wq2: + destroy_workqueue(shrm->shm_audio_ch_wr_wq); +free_wq1: + destroy_workqueue(shrm->shm_common_ch_wr_wq); + return err; +} + +void shrm_protocol_deinit(struct shrm_dev *shrm) +{ + free_irq(IRQ_PRCMU_CA_SLEEP, NULL); + free_irq(IRQ_PRCMU_CA_WAKE, NULL); + free_irq(IRQ_PRCMU_MODEM_SW_RESET_REQ, NULL); + flush_scheduled_work(); + destroy_workqueue(shrm->shm_common_ch_wr_wq); + destroy_workqueue(shrm->shm_audio_ch_wr_wq); + destroy_workqueue(shrm->shm_ac_wake_wq); + destroy_workqueue(shrm->shm_ca_wake_wq); + destroy_workqueue(shrm->shm_ac_sleep_wq); + modem_put(shrm->modem); +} + +int get_ca_wake_req_state(void) +{ + return ((atomic_read(&ac_sleep_disable_count) > 0) || + modem_get_usage(shm_dev->modem)); +} + +irqreturn_t ca_wake_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + /* initialize the FIFO Variables */ + if (boot_state == BOOT_INIT) + shm_fifo_init(shrm); + + dev_dbg(shrm->dev, "Inside ca_wake_irq_handler\n"); + + /* Clear the interrupt */ + writel((1 << GOP_CA_WAKE_REQ_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + /* send ca_wake_ack_interrupt to CMU */ + writel((1 << GOP_CA_WAKE_ACK_BIT), + shrm->intr_base + GOP_SET_REGISTER_BASE); + + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + + +irqreturn_t ac_read_notif_0_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + shm_ac_read_0_tasklet.data = (unsigned long)shrm; + tasklet_schedule(&shm_ac_read_0_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1 << GOP_COMMON_AC_READ_NOTIFICATION_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + +irqreturn_t ac_read_notif_1_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN+\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + shm_ac_read_1_tasklet.data = (unsigned long)shrm; + tasklet_schedule(&shm_ac_read_1_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1 << GOP_AUDIO_AC_READ_NOTIFICATION_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + +irqreturn_t ca_msg_pending_notif_0_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + tasklet_schedule(&shm_ca_0_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1 << GOP_COMMON_CA_MSG_PENDING_NOTIFICATION_BIT), + shrm->intr_base + GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; +} + +irqreturn_t ca_msg_pending_notif_1_irq_handler(int irq, void *ctrlr) +{ + struct shrm_dev *shrm = ctrlr; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + tasklet_schedule(&shm_ca_1_tasklet); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return IRQ_HANDLED; + } + + /* Clear the interrupt */ + writel((1<intr_base+GOP_CLEAR_REGISTER_BASE); + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return IRQ_HANDLED; + +} + +/** + * shm_write_msg() - write message to shared memory + * @shrm: pointer to the shrm device information structure + * @l2_header: L2 header + * @addr: pointer to the message + * @length: length of the message to be written + * + * This function is called from net or char interface driver write operation. + * Prior to calling this function the message is copied from the user space + * buffer to the kernel buffer. This function based on the l2 header routes + * the message to the respective channel and FIFO. Then makes a call to the + * fifo write function where the message is written to the physical device. + */ +int shm_write_msg(struct shrm_dev *shrm, u8 l2_header, + void *addr, u32 length) +{ + u8 channel = 0; + int ret; + + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (boot_state != BOOT_DONE) { + dev_err(shrm->dev, + "error after boot done call this fn\n"); + ret = -ENODEV; + goto out; + } + + if ((l2_header == L2_HEADER_ISI) || + (l2_header == L2_HEADER_RPC) || + (l2_header == L2_HEADER_SECURITY) || + (l2_header == L2_HEADER_COMMON_SIMPLE_LOOPBACK) || + (l2_header == L2_HEADER_COMMON_ADVANCED_LOOPBACK)) { + channel = 0; + if (shrm_common_tx_state == SHRM_SLEEP_STATE) + shrm_common_tx_state = SHRM_PTR_FREE; + else if (shrm_common_tx_state == SHRM_IDLE) + shrm_common_tx_state = SHRM_PTR_FREE; + + } else if ((l2_header == L2_HEADER_AUDIO) || + (l2_header == L2_HEADER_AUDIO_SIMPLE_LOOPBACK) || + (l2_header == L2_HEADER_AUDIO_ADVANCED_LOOPBACK)) { + if (shrm_audio_tx_state == SHRM_SLEEP_STATE) + shrm_audio_tx_state = SHRM_PTR_FREE; + else if (shrm_audio_tx_state == SHRM_IDLE) + shrm_audio_tx_state = SHRM_PTR_FREE; + + channel = 1; + } else { + ret = -ENODEV; + goto out; + } + ret = shm_write_msg_to_fifo(shrm, channel, l2_header, addr, length); + if (ret < 0) { + dev_err(shrm->dev, "write message to fifo failed\n"); + return ret; + } + /* + * notify only if new msg copied is the only unread one + * otherwise it means that reading process is ongoing + */ + if (is_the_only_one_unread_message(shrm, channel, length)) { + + /* Send Message Pending Noitication to CMT */ + if (channel == 0) + queue_work(shrm->shm_common_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_0); + else + queue_work(shrm->shm_audio_ch_wr_wq, + &shrm->send_ac_msg_pend_notify_1); + + } + + dev_dbg(shrm->dev, "%s OUT\n", __func__); + return 0; + +out: + return ret; +} + +void ca_msg_read_notification_0(struct shrm_dev *shrm) +{ + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (get_ca_msg_0_read_notif_send() == 0) { + update_ca_common_shared_rptr(shrm); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + /* Trigger CaMsgReadNotification to CMU */ + writel((1 << GOP_COMMON_CA_READ_NOTIFICATION_BIT), + shrm->intr_base + GOP_SET_REGISTER_BASE); + set_ca_msg_0_read_notif_send(1); + shrm_common_rx_state = SHRM_PTR_BUSY; + } + + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +void ca_msg_read_notification_1(struct shrm_dev *shrm) +{ + dev_dbg(shrm->dev, "%s IN\n", __func__); + + if (get_ca_msg_1_read_notif_send() == 0) { + update_ca_audio_shared_rptr(shrm); + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + /* Trigger CaMsgReadNotification to CMU */ + writel((1<intr_base+GOP_SET_REGISTER_BASE); + set_ca_msg_1_read_notif_send(1); + shrm_audio_rx_state = SHRM_PTR_BUSY; + } + dev_dbg(shrm->dev, "%s OUT\n", __func__); +} + +/** + * receive_messages_common - receive common channnel msg from + * CMT(Cellular Mobile Terminal) + * @shrm: pointer to shrm device information structure + * + * The messages sent from CMT to APE are written to the respective FIFO + * and an interrupt is triggered by the CMT. This ca message pending + * interrupt calls this function. This function sends a read notification + * acknowledgement to the CMT and calls the common channel receive handler + * where the messsage is copied to the respective(ISI, RPC, SECURIT) queue + * based on the message l2 header. + */ +void receive_messages_common(struct shrm_dev *shrm) +{ + u8 l2_header; + u32 len; + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_common(shrm, recieve_common_msg, &len); + /* Send Recieve_Call_back to Upper Layer */ + if (!rx_common_handler) { + dev_err(shrm->dev, "common_rx_handler is Null\n"); + BUG(); + } + (*rx_common_handler)(l2_header, &recieve_common_msg, len, + shrm); + /* SendReadNotification */ + ca_msg_read_notification_0(shrm); + + while (read_remaining_messages_common()) { + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_common(shrm, recieve_common_msg, + &len); + /* Send Recieve_Call_back to Upper Layer */ + (*rx_common_handler)(l2_header, + &recieve_common_msg, len, + shrm); + } +} + +/** + * receive_messages_audio() - receive audio message from CMT + * @shrm: pointer to shrm device information structure + * + * The messages sent from CMT to APE are written to the respective FIFO + * and an interrupt is triggered by the CMT. This ca message pending + * interrupt calls this function. This function sends a read notification + * acknowledgement to the CMT and calls the common channel receive handler + * where the messsage is copied to the audio queue. + */ +void receive_messages_audio(struct shrm_dev *shrm) +{ + u8 l2_header; + u32 len; + + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_audio(shrm, recieve_audio_msg, &len); + /* Send Recieve_Call_back to Upper Layer */ + + if (!rx_audio_handler) { + dev_crit(shrm->dev, "audio_rx_handler is Null\n"); + BUG(); + } + (*rx_audio_handler)(l2_header, &recieve_audio_msg, + len, shrm); + + /* SendReadNotification */ + ca_msg_read_notification_1(shrm); + while (read_remaining_messages_audio()) { + if (check_modem_in_reset()) { + dev_err(shrm->dev, "%s:Modem state reset or unknown.\n", + __func__); + return; + } + + l2_header = read_one_l2msg_audio(shrm, + recieve_audio_msg, &len); + /* Send Recieve_Call_back to Upper Layer */ + (*rx_audio_handler)(l2_header, + &recieve_audio_msg, len, + shrm); + } +} + +u8 get_boot_state() +{ + return boot_state; +} diff --git a/drivers/net/u8500_shrm.c b/drivers/net/u8500_shrm.c index 488f96f2c04..0e813bbb3cc 100644 --- a/drivers/net/u8500_shrm.c +++ b/drivers/net/u8500_shrm.c @@ -12,15 +12,15 @@ #include #include #include +#include +#include +#include +#include +#include #include #include #include -#include -#include -#include -#include -#include /** * shrm_net_receive() - receive data and copy to user space buffer diff --git a/include/linux/modem/shrm/shrm.h b/include/linux/modem/shrm/shrm.h new file mode 100644 index 00000000000..6deeeb16ba8 --- /dev/null +++ b/include/linux/modem/shrm/shrm.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHM_DRIVER_IF_H__ +#define __SHM_DRIVER_IF_H__ + +#include + +/* forward declaration */ +struct shrm_dev; + +typedef void (*rx_cb)(void *data, unsigned int length); +typedef void (*received_msg_handler)(unsigned char l2_header, + void *msg_ptr, unsigned int length, + struct shrm_dev *shrm); + +#endif diff --git a/include/linux/modem/shrm/shrm_config.h b/include/linux/modem/shrm/shrm_config.h new file mode 100644 index 00000000000..a82b35ef77b --- /dev/null +++ b/include/linux/modem/shrm/shrm_config.h @@ -0,0 +1,111 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_CONFIG_H +#define __SHRM_CONFIG_H + + +/* +Note: modem need to define IPC as a non-cacheable area. +In Cortex R4 MPU requires that base address of NC area is aligned on a +region-sized boundary.On modem side, only 1 NC area can be defined, hence +the whole IPC area must be defined as NC (at least). + +*/ + +/* cache line size = 32bytes*/ +#define SHM_CACHE_LINE 32 +#define SHM_PTR_SIZE 4 + +/* FIFO 0 address configuration */ +/* ---------------------------- */ +/* 128KB */ +#define SHM_FIFO_0_SIZE (128*1024) + + +/* == APE addresses == */ +#ifdef CONFIG_SHRM_V1_UPDATES_VERSION +#define SHM_IPC_BASE_AMCU 0x06F80000 +#else +#define SHM_IPC_BASE_AMCU 0x06000000 +#endif + +/* offset pointers */ +#define SHM_ACFIFO_0_WRITE_AMCU SHM_IPC_BASE_AMCU +#define SHM_ACFIFO_0_READ_AMCU (SHM_ACFIFO_0_WRITE_AMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_0_WRITE_AMCU (SHM_ACFIFO_0_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_READ_AMCU (SHM_CAFIFO_0_WRITE_AMCU + SHM_PTR_SIZE) +/* FIFO start */ +#define SHM_ACFIFO_0_START_AMCU (SHM_CAFIFO_0_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_START_AMCU (SHM_ACFIFO_0_START_AMCU + SHM_FIFO_0_SIZE) + + +/* == CMT addresses ==*/ +#define SHM_IPC_BASE_CMCU (SHM_IPC_BASE_AMCU+0x08000000) +/* offset pointers */ +#define SHM_ACFIFO_0_WRITE_CMCU SHM_IPC_BASE_CMCU +#define SHM_ACFIFO_0_READ_CMCU (SHM_ACFIFO_0_WRITE_CMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_0_WRITE_CMCU (SHM_ACFIFO_0_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_READ_CMCU (SHM_CAFIFO_0_WRITE_CMCU + SHM_PTR_SIZE) +/* FIFO*/ +#define SHM_ACFIFO_0_START_CMCU (SHM_CAFIFO_0_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_0_START_CMCU (SHM_ACFIFO_0_START_CMCU + SHM_FIFO_0_SIZE) + + +/* ADSP addresses*/ +#define SHM_ACFIFO_0_START_ADSP 0x0 +#define SHM_CAFIFO_0_START_ADSP 0x0 +#define SHM_ACFIFO_0_WRITE_ADSP 0x0 +#define SHM_ACFIFO_0_READ_ADSP 0x0 +#define SHM_CAFIFO_0_WRITE_ADSP 0x0 +#define SHM_CAFIFO_0_READ_ADSP 0x0 + +/* FIFO 1 address configuration */ +/* ---------------------------- */ + + +/* FIFO 1 - 4K */ +#define SHM_FIFO_1_SIZE (4*1024) + + +/* == APE addresses == */ +#define SHM_ACFIFO_1_WRITE_AMCU (SHM_CAFIFO_0_START_AMCU + SHM_FIFO_0_SIZE) +#define SHM_ACFIFO_1_READ_AMCU (SHM_ACFIFO_1_WRITE_AMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_1_WRITE_AMCU (SHM_ACFIFO_1_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_READ_AMCU (SHM_CAFIFO_1_WRITE_AMCU + SHM_PTR_SIZE) +/* FIFO*/ +#define SHM_ACFIFO_1_START_AMCU (SHM_CAFIFO_1_WRITE_AMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_START_AMCU (SHM_ACFIFO_1_START_AMCU + SHM_FIFO_1_SIZE) + + +/* == CMT addresses ==*/ +#define SHM_ACFIFO_1_WRITE_CMCU (SHM_CAFIFO_0_START_CMCU + SHM_FIFO_0_SIZE) +#define SHM_ACFIFO_1_READ_CMCU (SHM_ACFIFO_1_WRITE_CMCU + SHM_PTR_SIZE) +#define SHM_CAFIFO_1_WRITE_CMCU (SHM_ACFIFO_1_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_READ_CMCU (SHM_CAFIFO_1_WRITE_CMCU + SHM_PTR_SIZE) +/* FIFO1 start */ +#define SHM_ACFIFO_1_START_CMCU (SHM_CAFIFO_1_WRITE_CMCU + SHM_CACHE_LINE) +#define SHM_CAFIFO_1_START_CMCU (SHM_ACFIFO_1_START_CMCU + SHM_FIFO_1_SIZE) + + +/* ADSP addresses*/ +#define SHM_ACFIFO_1_START_ADSP 0x0 +#define SHM_CAFIFO_1_START_ADSP 0x0 +#define SHM_ACFIFO_1_WRITE_ADSP 0x0 +#define SHM_ACFIFO_1_READ_ADSP 0x0 +#define SHM_CAFIFO_1_WRITE_ADSP 0x0 +#define SHM_CAFIFO_1_READ_ADSP 0x0 + + +#define U8500_SHM_FIFO_APE_COMMON_BASE (SHM_ACFIFO_0_START_AMCU) +#define U8500_SHM_FIFO_CMT_COMMON_BASE (SHM_CAFIFO_0_START_AMCU) +#define U8500_SHM_FIFO_APE_AUDIO_BASE (SHM_ACFIFO_1_START_AMCU) +#define U8500_SHM_FIFO_CMT_AUDIO_BASE (SHM_CAFIFO_1_START_AMCU) + +#endif /* __SHRM_CONFIG_H */ diff --git a/include/linux/modem/shrm/shrm_driver.h b/include/linux/modem/shrm/shrm_driver.h new file mode 100644 index 00000000000..f662a0c4533 --- /dev/null +++ b/include/linux/modem/shrm/shrm_driver.h @@ -0,0 +1,202 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_DRIVER_H__ +#define __SHRM_DRIVER_H__ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ISA_DEVICES 6 + +#define BOOT_INIT (0) +#define BOOT_INFO_SYNC (1) +#define BOOT_DONE (2) +#define BOOT_UNKNOWN (3) + +/** + * struct shrm_dev - shrm device information + * @ca_wake_irq: CMT wake interrupt number + * @ac_read_notif_0_irq: ape-cmt common channel read notify interrupt + * @ac_read_notif_1_irq: ape-cmt audio channel read notify interrupt + * @ca_msg_pending_notif_0_irq: cmt-ape common channel msg pending interrupt + * @ca_msg_pending_notif_1_irq: cmt-ape audio channel msg pending interrupt + * @intr_base: interrupt base register address + * @ape_common_fifo_base: ape side common channel fifo base addr + * @ape_audio_fifo_base: ape side audio channel fifo base addr + * @cmt_common_fifo_base: cmt side common channel fifo base addr + * @cmt_audio_fifo_base: cmt side audio channel fifo base addr + * @ape_common_fifo_base_phy: physical addr of ape common fifo + * @ape_audio_fifo_base_phy: physical addr of ape audio fifo + * @cmt_common_fifo_base_phy: physical addr of cmt common fifo + * @cmt_audio_fifo_base_phy: physical addr of cmt audio fifo + * @ape_common_fifo_size: ape side common channel fifo size + * @ape_audio_fifo_size: ape side audio channel fifo size + * @cmt_common_fifo_size: cmt side common channel fifo size + * @cmt_audio_fifo_size: cmt side audio channel fifo size + * @netdev_flag_up: flag to indicate up/down of netwok device + * @msr_flag: flag to check on-going MSR sequence + * @ac_common_shared_wptr: ape-cmt common channel write pointer + * @ac_common_shared_rptr: ape-cmt common channel read pointer + * @ca_common_shared_wptr: cmt-ape common channel write pointer + * @ca_common_shared_rptr: cmt-ape common channel read pointer + * @ac_audio_shared_wptr: ape-cmt audio channel write pointer + * @ac_audio_shared_rptr: ape-cmt audio channel read pointer + * @ca_audio_shared_wptr: cmt-ape audio channel write pointer + * @ca_audio_shared_rptr: cmt-ape audio channel read pointer + * @dev: pointer to the driver device + * @ndev: pointer to the network device structure + * @isa_context: pointer to t_isa_driver_sontext dtructure + * @shm_common_ch_wr_wq: work queue for writing to common channel + * @shm_audio_ch_wr_wq: workqueue for writing to audio channel + * @shm_ac_wake_wq: workqueue for receiving ape-cmt wake requests + * @shm_ca_wake_wq: workqueue for receiving cmt-ape wake requests + * @shm_ac_sleep_wq: workqueue for recieving ape-cmt sleep requests + * @send_ac_msg_pend_notify_0: work for handling pending message on common + * channel + * @send_ac_msg_pend_notify_1: work for handling pending message on audio + * channel + * @shm_ac_wake_req: work to send ape-cmt wake request + * @shm_ca_wake_req: work to send cmt-ape wake request + * @shm_ca_sleep_req: work to send cmt-ape sleep request + * @shm_ac_sleep_req: work to send ape-cmt sleep request + */ +struct shrm_dev { + u8 ca_wake_irq; + u8 ac_read_notif_0_irq; + u8 ac_read_notif_1_irq; + u8 ca_msg_pending_notif_0_irq; + u8 ca_msg_pending_notif_1_irq; + void __iomem *intr_base; + void __iomem *ape_common_fifo_base; + void __iomem *ape_audio_fifo_base; + void __iomem *cmt_common_fifo_base; + void __iomem *cmt_audio_fifo_base; + + u32 *ape_common_fifo_base_phy; + u32 *ape_audio_fifo_base_phy; + u32 *cmt_common_fifo_base_phy; + u32 *cmt_audio_fifo_base_phy; + + int ape_common_fifo_size; + int ape_audio_fifo_size; + int cmt_common_fifo_size; + int cmt_audio_fifo_size; + int netdev_flag_up; + int msr_flag; + + void __iomem *ac_common_shared_wptr; + void __iomem *ac_common_shared_rptr; + void __iomem *ca_common_shared_wptr; + void __iomem *ca_common_shared_rptr; + + void __iomem *ac_audio_shared_wptr; + void __iomem *ac_audio_shared_rptr; + void __iomem *ca_audio_shared_wptr; + void __iomem *ca_audio_shared_rptr; + + struct device *dev; + struct net_device *ndev; + struct modem *modem; + struct isa_driver_context *isa_context; + struct workqueue_struct *shm_common_ch_wr_wq; + struct workqueue_struct *shm_audio_ch_wr_wq; + struct workqueue_struct *shm_ac_wake_wq; + struct workqueue_struct *shm_ca_wake_wq; + struct workqueue_struct *shm_ac_sleep_wq; + struct work_struct send_ac_msg_pend_notify_0; + struct work_struct send_ac_msg_pend_notify_1; + struct work_struct shm_ac_wake_req; + struct work_struct shm_ca_wake_req; + struct work_struct shm_ca_sleep_req; + struct work_struct shm_ac_sleep_req; +}; + +/** + * struct queue_element - information to add an element to queue + * @entry: list entry + * @offset: message offset + * @size: message size + * @no: total number of messages + */ +struct queue_element { + struct list_head entry; + u32 offset; + u32 size; + u32 no; +}; + +/** + * struct message_queue - ISI, RPC, AUDIO, SECURITY message queue information + * @fifo_base: pointer to the respective fifo base + * @size: size of the data to be read + * @readptr: fifo read pointer + * @writeptr: fifo write pointer + * @no: total number of messages + * @update_lock: spinlock for protecting the queue read operation + * @q_rp: queue write pointer + * @wq_readable: wait queue head + * @msg_list: message list + * @shrm: pointer to shrm device information structure + */ +struct message_queue { + u8 *fifo_base; + u32 size; + u32 readptr; + u32 writeptr; + u32 no; + spinlock_t update_lock; + atomic_t q_rp; + wait_queue_head_t wq_readable; + struct list_head msg_list; + struct shrm_dev *shrm; +}; + +/** + * struct isadev_context - shrm char interface context + * @dl_queue: structre to store the queue related info + * @device_id: message id(ISI, RPC, AUDIO, SECURITY) + * @addr: device addresses. + */ +struct isadev_context { + struct message_queue dl_queue; + u8 device_id; + void *addr; +}; + +/** + * struct isa_driver_context - shrm char interface device information + * @is_open: flag to check the usage of queue + * @isadev: pointer to struct t_isadev_context + * @common_tx: spinlock for protecting common channel + * @tx_audio_mutex: mutex for protecting audio channel + * @cdev: character device structre + * @shm_class: pointer to the class structure + */ +struct isa_driver_context { + atomic_t is_open[ISA_DEVICES]; + struct isadev_context *isadev; + spinlock_t common_tx; + struct mutex tx_audio_mutex; + struct cdev cdev; + struct class *shm_class; +}; + +#endif diff --git a/include/linux/modem/shrm/shrm_net.h b/include/linux/modem/shrm/shrm_net.h new file mode 100644 index 00000000000..a97b276ee15 --- /dev/null +++ b/include/linux/modem/shrm/shrm_net.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) ST-Ericsson SA 2009 + * + * Author: Kumar Sanghvi for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_NET_H +#define __SHRM_NET_H + +#define SHRM_HLEN 1 +#define PHONET_ALEN 1 + +#define PN_PIPE 0xD9 +#define PN_DEV_HOST 0x00 +#define PN_LINK_ADDR 0x26 +#define PN_TX_QUEUE_LEN 3 + +#define RESOURCE_ID_INDEX 3 +#define SRC_OBJ_INDEX 7 +#define MSG_ID_INDEX 9 +#define PIPE_HDL_INDEX 10 +#define NETLINK_SHRM 20 + +/** + * struct shrm_net_iface_priv - shrm net interface device information + * @shrm_device: pointer to the shrm device information structure + * @iface_num: flag used to indicate the up/down of netdev + */ +struct shrm_net_iface_priv { + struct shrm_dev *shrm_device; + unsigned int iface_num; +}; + +int shrm_register_netdev(struct shrm_dev *shrm_dev_data); +int shrm_net_receive(struct net_device *dev); +int shrm_suspend_netdev(struct net_device *dev); +int shrm_resume_netdev(struct net_device *dev); +int shrm_stop_netdev(struct net_device *dev); +int shrm_restart_netdev(struct net_device *dev); +int shrm_start_netdev(struct net_device *dev); +void shrm_unregister_netdev(struct shrm_dev *shrm_dev_data); + +#endif /* __SHRM_NET_H */ diff --git a/include/linux/modem/shrm/shrm_private.h b/include/linux/modem/shrm/shrm_private.h new file mode 100644 index 00000000000..2063f6d6e8e --- /dev/null +++ b/include/linux/modem/shrm/shrm_private.h @@ -0,0 +1,181 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Biju Das for ST-Ericsson + * Author: Kumar Sanghavi for ST-Ericsson + * Author: Arun Murthy for ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef __SHRM_PRIVATE_INCLUDED +#define __SHRM_PRIVATE_INCLUDED + +#include +#include +#include +#include + +#define GOP_OUTPUT_REGISTER_BASE (0x0) +#define GOP_SET_REGISTER_BASE (0x4) +#define GOP_CLEAR_REGISTER_BASE (0x8) +#define GOP_TOGGLE_REGISTER_BASE (0xc) + + +#define GOP_AUDIO_AC_READ_NOTIFICATION_BIT (0) +#define GOP_AUDIO_CA_MSG_PENDING_NOTIFICATION_BIT (1) +#define GOP_COMMON_AC_READ_NOTIFICATION_BIT (2) +#define GOP_COMMON_CA_MSG_PENDING_NOTIFICATION_BIT (3) +#define GOP_CA_WAKE_REQ_BIT (7) +#define GOP_AUDIO_CA_READ_NOTIFICATION_BIT (23) +#define GOP_AUDIO_AC_MSG_PENDING_NOTIFICATION_BIT (24) +#define GOP_COMMON_CA_READ_NOTIFICATION_BIT (25) +#define GOP_COMMON_AC_MSG_PENDING_NOTIFICATION_BIT (26) +#define GOP_CA_WAKE_ACK_BIT (27) + +#define L2_MSG_MAPID_OFFSET (24) +#define L1_MSG_MAPID_OFFSET (28) + +#define SHRM_SLEEP_STATE (0) +#define SHRM_PTR_FREE (1) +#define SHRM_PTR_BUSY (2) +#define SHRM_IDLE (3) + +#define ISI_MESSAGING (0) +#define RPC_MESSAGING (1) +#define AUDIO_MESSAGING (2) +#define SECURITY_MESSAGING (3) +#define COMMON_LOOPBACK_MESSAGING (0xC0) +#define AUDIO_LOOPBACK_MESSAGING (0x80) + +#define COMMON_CHANNEL 0 +#define AUDIO_CHANNEL 1 + +typedef void (*MSG_PENDING_NOTIF)(const u32 Wptr); + +/** + * struct fifo_write_params - parameters used for FIFO write operation. + * @writer_local_rptr: pointer to local read buffer + * @writer_local_wptr: pointer to local write buffer + * @shared_wptr: write pointer shared by cmt and ape + * @shared_rptr: read pointer shared by cmt and ape + * @availablesize: available memory in fifo + * @end_addr_fifo: fifo end addr + * @fifo_virtual_addr: fifo virtual addr + * @fifo_update_lock: spin lock to update fifo. + * + * On writting a message to FIFO the same has to be read by the modem before + * writing the next message to the FIFO. In oder to over come this a local + * write and read pointer is used for internal purpose. + */ +struct fifo_write_params { + u32 writer_local_rptr; + u32 writer_local_wptr; + u32 shared_wptr; + u32 shared_rptr; + u32 availablesize; + u32 end_addr_fifo; + u32 *fifo_virtual_addr; + spinlock_t fifo_update_lock; +} ; + +/** + * struct fifo_read_params - parameters used for FIFO read operation + * @reader_local_rptr: pointer to local read buffer + * @reader_local_wptr: pointer to local write buffer + * @shared_wptr: write pointer shared by cmt and ape + * @shared_rptr: read pointer shared by cmt and ape + * @availablesize: available memory in fifo + * @end_addr_fifo: fifo end add + * @fifo_virtual_addr: fifo virtual addr + */ +struct fifo_read_params{ + u32 reader_local_rptr; + u32 reader_local_wptr; + u32 shared_wptr; + u32 shared_rptr; + u32 availablesize; + u32 end_addr_fifo; + u32 *fifo_virtual_addr; + +} ; + +int shrm_protocol_init(struct shrm_dev *shrm, + received_msg_handler common_rx_handler, + received_msg_handler audio_rx_handler); +void shrm_protocol_deinit(struct shrm_dev *shrm); +void shm_fifo_init(struct shrm_dev *shrm); +int shm_write_msg_to_fifo(struct shrm_dev *shrm, u8 channel, + u8 l2header, void *addr, u32 length); +int shm_write_msg(struct shrm_dev *shrm, + u8 l2_header, void *addr, u32 length); + +u8 is_the_only_one_unread_message(struct shrm_dev *shrm, + u8 channel, u32 length); +u8 read_remaining_messages_common(void); +u8 read_remaining_messages_audio(void); +u8 read_one_l2msg_audio(struct shrm_dev *shrm, + u8 *p_l2_msg, u32 *p_len); +u8 read_one_l2msg_common(struct shrm_dev *shrm, + u8 *p_l2_msg, u32 *p_len); +void receive_messages_common(struct shrm_dev *shrm); +void receive_messages_audio(struct shrm_dev *shrm); + +void update_ac_common_local_rptr(struct shrm_dev *shrm); +void update_ac_audio_local_rptr(struct shrm_dev *shrm); +void update_ca_common_local_wptr(struct shrm_dev *shrm); +void update_ca_audio_local_wptr(struct shrm_dev *shrm); +void update_ac_common_shared_wptr(struct shrm_dev *shrm); +void update_ac_audio_shared_wptr(struct shrm_dev *shrm); +void update_ca_common_shared_rptr(struct shrm_dev *shrm); +void update_ca_audio_shared_rptr(struct shrm_dev *shrm); + + +void get_writer_pointers(u8 msg_type, u32 *WriterLocalRptr, \ + u32 *WriterLocalWptr, u32 *SharedWptr); +void get_reader_pointers(u8 msg_type, u32 *ReaderLocalRptr, \ + u32 *ReaderLocalWptr, u32 *SharedRptr); +u8 read_boot_info_req(struct shrm_dev *shrm, + u32 *pConfig, + u32 *pVersion); +void write_boot_info_resp(struct shrm_dev *shrm, u32 Config, + u32 Version); + +void send_ac_msg_pending_notification_0(struct shrm_dev *shrm); +void send_ac_msg_pending_notification_1(struct shrm_dev *shrm); +void ca_msg_read_notification_0(struct shrm_dev *shrm); +void ca_msg_read_notification_1(struct shrm_dev *shrm); + +void set_ca_msg_0_read_notif_send(u8 val); +u8 get_ca_msg_0_read_notif_send(void); +void set_ca_msg_1_read_notif_send(u8 val); +u8 get_ca_msg_1_read_notif_send(void); + +irqreturn_t ca_wake_irq_handler(int irq, void *ctrlr); +irqreturn_t ac_read_notif_0_irq_handler(int irq, void *ctrlr); +irqreturn_t ac_read_notif_1_irq_handler(int irq, void *ctrlr); +irqreturn_t ca_msg_pending_notif_0_irq_handler(int irq, void *ctrlr); +irqreturn_t ca_msg_pending_notif_1_irq_handler(int irq, void *ctrlr); + +void shm_ca_msgpending_0_tasklet(unsigned long); +void shm_ca_msgpending_1_tasklet(unsigned long); +void shm_ac_read_notif_0_tasklet(unsigned long); +void shm_ac_read_notif_1_tasklet(unsigned long); +void shm_ca_wake_req_tasklet(unsigned long); + +u8 get_boot_state(void); + +int get_ca_wake_req_state(void); + +/* shrm character interface */ +int isa_init(struct shrm_dev *shrm); +void isa_exit(struct shrm_dev *shrm); +int add_msg_to_queue(struct message_queue *q, u32 size); +ssize_t isa_read(struct file *filp, char __user *buf, size_t len, + loff_t *ppos); +int get_size_of_new_msg(struct message_queue *q); +int remove_msg_from_queue(struct message_queue *q); +void shrm_char_reset_queues(struct shrm_dev *shrm); +int shrm_get_cdev_index(u8 l2_header); +int shrm_get_cdev_l2header(u8 idx); + +#endif -- cgit v1.2.3 From c9a822898bc7c88c1bd291fd236ff0e54d6e6789 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Wed, 8 Jun 2011 11:07:32 +0530 Subject: Stagging : AB5500 SIM interface Driver SIM Interface driver provides interface to configure various parameters of AB5500 SIM Level Shifter. Support provided are: Configure Pull up on sim lines Configure Operation Mode Notify Sim Insert/Extract Interrupt ST-Ericsson Linux next: 336280 ST-Ericsson ID: 341172 ST-Ericsson FOSS-OUT ID:STETL-FOSS-OUT-10242 Change-Id: I5ef4b92384ca4da0f96839afae7c7468f244978f Signed-off-by: Bibek Basu Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/21582 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- drivers/staging/ab5500_sim/Makefile | 1 + drivers/staging/ab5500_sim/ab5500-sim.c | 299 ++++++++++++++++++++++++++++++++ drivers/staging/ab5500_sim/sysfs-sim | 83 +++++++++ 3 files changed, 383 insertions(+) create mode 100644 drivers/staging/ab5500_sim/Makefile create mode 100644 drivers/staging/ab5500_sim/ab5500-sim.c create mode 100644 drivers/staging/ab5500_sim/sysfs-sim diff --git a/drivers/staging/ab5500_sim/Makefile b/drivers/staging/ab5500_sim/Makefile new file mode 100644 index 00000000000..520717e4dd7 --- /dev/null +++ b/drivers/staging/ab5500_sim/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_AB5500_SIM) += ab5500-sim.o diff --git a/drivers/staging/ab5500_sim/ab5500-sim.c b/drivers/staging/ab5500_sim/ab5500-sim.c new file mode 100644 index 00000000000..788a7984a46 --- /dev/null +++ b/drivers/staging/ab5500_sim/ab5500-sim.c @@ -0,0 +1,299 @@ +/* + * Copyright (C) ST Ericsson SA 2010 + * + * Sim Interface driver for AB5500 + * + * License Terms: GNU General Public License v2 + * Author: Bibek Basu + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define USIM_SUP2_REG 0x13 +#define USIM_SUP_REG 0x14 +#define USIM_SIMCTRL_REG 0x17 +#define USIM_SIMCTRL2_REG 0x18 +#define USIM_USBUICC_REG 0x19 +#define USIM_USBUICC2_REG 0x20 +#define SIM_DAT_PULLUP_10K 0x0F +#define SIM_LDO_1_8V 1875000 +#define SIM_LDO_2_8V 2800000 +#define SIM_LDO_2_9V 2900000 + +enum shift { + SHIFT0, + SHIFT1, + SHIFT2, + SHIFT3, + SHIFT4, + SHIFT5, + SHIFT6, + SHIFT7, +}; + +enum mask { + MASK1 = 1, + MASK3 = 3, + MASK7 = 7, +}; + +enum sim_mode { + OFF_MODE, + LOW_PWR, + PWRCTRL, + FULL_PWR, +}; +/** + * struct ab5500_sim - ab5500 Sim Interface device information + * @dev: pointer to the structure device + * @lock: mutex lock + * @sim_int_status: Sim presence status + * @irq_base: Base of the two irqs + */ +struct ab5500_sim { + struct device *dev; + struct mutex lock; + bool sim_int_status; + u8 irq_base; +}; + +/* Exposure to the sysfs interface */ +int ab5500_sim_weak_pulldforce(struct device *dev, + struct device_attribute *attr, + const char *user_buf, size_t count) +{ + unsigned long user_val; + int err; + bool enable; + + err = strict_strtoul(user_buf, 0, &user_val); + if (err) + return -EINVAL; + enable = user_val ? true : false; + err = abx500_mask_and_set(dev, AB5500_BANK_SIM_USBSIM, + USIM_USBUICC2_REG, MASK1 << SHIFT5, user_val << SHIFT5); + if (err) + return -EINVAL; + return count; +} + +int ab5500_sim_load_sel(struct device *dev, + struct device_attribute *attr, + const char *user_buf, size_t count) +{ + unsigned long user_val; + int err; + bool enable; + + err = strict_strtoul(user_buf, 0, &user_val); + if (err) + return -EINVAL; + enable = user_val ? true : false; + err = abx500_mask_and_set(dev, AB5500_BANK_SIM_USBSIM, + USIM_USBUICC_REG, MASK1 << SHIFT1, user_val << SHIFT1); + if (err) + return -EINVAL; + return count; +} + +int ab5500_sim_mode_sel(struct device *dev, + struct device_attribute *attr, + const char *user_buf, size_t count) +{ + unsigned long user_val; + int err; + + err = strict_strtoul(user_buf, 0, &user_val); + if (err) + return -EINVAL; + err = abx500_mask_and_set(dev, AB5500_BANK_SIM_USBSIM, + USIM_SIMCTRL2_REG, MASK3 << SHIFT4, user_val << SHIFT4); + if (err) + return -EINVAL; + return count; +} + +int ab5500_sim_dat_pullup(struct device *dev, + struct device_attribute *attr, + const char *user_buf, size_t count) +{ + unsigned long user_val; + int err; + + err = strict_strtoul(user_buf, 0, &user_val); + if (err) + return -EINVAL; + err = abx500_mask_and_set(dev, AB5500_BANK_SIM_USBSIM, + USIM_SIMCTRL_REG, MASK7, user_val); + if (err) + return -EINVAL; + return count; +} + +int ab5500_sim_enable_pullup(struct device *dev, + struct device_attribute *attr, + const char *user_buf, size_t count) +{ + unsigned long user_val; + int err; + bool enable; + + err = strict_strtoul(user_buf, 0, &user_val); + if (err) + return -EINVAL; + enable = user_val ? true : false; + err = abx500_mask_and_set(dev, AB5500_BANK_SIM_USBSIM, + USIM_SIMCTRL_REG, MASK1 << SHIFT3, enable << SHIFT3); + if (err) + return -EINVAL; + return count; +} + +static ssize_t ab5500_simoff_int(struct device *dev, + struct device_attribute *devattr, char *user_buf) +{ + struct ab5500_sim *di = dev_get_drvdata(dev); + int len; + + mutex_lock(&di->lock); + len = sprintf(user_buf, "%d\n", di->sim_int_status); + mutex_unlock(&di->lock); + return len; +} + +static DEVICE_ATTR(enable_pullup, S_IWUSR, NULL, ab5500_sim_enable_pullup); +static DEVICE_ATTR(dat_pullup, S_IWUSR, NULL, ab5500_sim_dat_pullup); +static DEVICE_ATTR(mode_sel, S_IWUSR, NULL, ab5500_sim_mode_sel); +static DEVICE_ATTR(load_sel, S_IWUSR, NULL, ab5500_sim_load_sel); +static DEVICE_ATTR(weak_pulldforce, S_IWUSR, NULL, ab5500_sim_weak_pulldforce); +static DEVICE_ATTR(simoff_int, S_IRUGO, ab5500_simoff_int, NULL); + +static struct attribute *ab5500_sim_attributes[] = { + &dev_attr_enable_pullup.attr, + &dev_attr_dat_pullup.attr, + &dev_attr_mode_sel.attr, + &dev_attr_load_sel.attr, + &dev_attr_weak_pulldforce.attr, + &dev_attr_simoff_int.attr, + NULL +}; + +static const struct attribute_group ab5500sim_attr_grp = { + .attrs = ab5500_sim_attributes, +}; + +static irqreturn_t ab5500_sim_irq_handler(int irq, void *irq_data) +{ + struct platform_device *pdev = irq_data; + struct ab5500_sim *data = platform_get_drvdata(pdev); + + if (irq == data->irq_base) + data->sim_int_status = true; + else + data->sim_int_status = false; + sysfs_notify(&pdev->dev.kobj, NULL, "simoff_int"); + + return IRQ_HANDLED; +} + +static int __devexit ab5500_sim_remove(struct platform_device *pdev) +{ + struct ab5500_sim *di = platform_get_drvdata(pdev); + int irq = platform_get_irq_byname(pdev, "SIMOFF"); + + if (irq >= 0) { + free_irq(irq, di); + irq++; + free_irq(irq, di); + } + sysfs_remove_group(&pdev->dev.kobj, &ab5500sim_attr_grp); + platform_set_drvdata(pdev, NULL); + kfree(di); + + return 0; +} + +static int __devinit ab5500_sim_probe(struct platform_device *pdev) +{ + int ret = 0; + int irq; + struct ab5500_sim *di = + kzalloc(sizeof(struct ab5500_sim), GFP_KERNEL); + if (!di) + return -ENOMEM; + + dev_info(&pdev->dev, "ab5500_sim_driver PROBE\n"); + irq = platform_get_irq_byname(pdev, "SIMOFF"); + if (irq < 0) { + dev_err(&pdev->dev, "Get irq by name failed\n"); + return irq; + } + di->irq_base = irq; + di->dev = &pdev->dev; + mutex_init(&di->lock); + platform_set_drvdata(pdev, di); + /* sysfs interface to configure sim reg from user space */ + if (sysfs_create_group(&pdev->dev.kobj, &ab5500sim_attr_grp) < 0) { + dev_err(&pdev->dev, " Failed creating sysfs group\n"); + return -ENOMEM; + } + ret = request_threaded_irq(irq, NULL, ab5500_sim_irq_handler, + IRQF_NO_SUSPEND , "ab5500-sim", pdev); + if (ret < 0) { + dev_err(&pdev->dev, "Request threaded irq failed (%d)\n", ret); + goto exit; + } + /* this is the contiguous irq for sim removal,falling edge */ + irq = irq + 1; + ret = request_threaded_irq(irq, NULL, ab5500_sim_irq_handler, + IRQF_NO_SUSPEND , "ab5500-sim", pdev); + if (ret < 0) { + dev_err(&pdev->dev, "Request threaded irq failed (%d)\n", ret); + free_irq(--irq, di); + goto exit; + } + return ret; +exit: + sysfs_remove_group(&pdev->dev.kobj, &ab5500sim_attr_grp); + platform_set_drvdata(pdev, NULL); + kfree(di); + return ret; +} + +static struct platform_driver ab5500_sim_driver = { + .probe = ab5500_sim_probe, + .remove = __devexit_p(ab5500_sim_remove), + .driver = { + .name = "ab5500-sim", + .owner = THIS_MODULE, + }, +}; + +static int __init ab5500_sim_init(void) +{ + return platform_driver_register(&ab5500_sim_driver); +} + +static void __exit ab5500_sim_exit(void) +{ + platform_driver_unregister(&ab5500_sim_driver); +} + +module_init(ab5500_sim_init); +module_exit(ab5500_sim_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Bibek Basu"); +MODULE_ALIAS("platform:ab5500-sim"); +MODULE_DESCRIPTION("AB5500 sim interface driver"); diff --git a/drivers/staging/ab5500_sim/sysfs-sim b/drivers/staging/ab5500_sim/sysfs-sim new file mode 100644 index 00000000000..b809b21e39e --- /dev/null +++ b/drivers/staging/ab5500_sim/sysfs-sim @@ -0,0 +1,83 @@ +What: /sys/devices/platform/ab5500-core.0/ab5500-sim.4/ +Date: June 2011 +KernelVersion: 2.6.35 +Contact: Bibek Basu +Description: + The /sys/devices/.../ab5500-sim.4 directory contains attributes + allowing the user space to check and configure ab5500 sim level + shifter interface caracteristics for communication to SIM card + +What: /sys/devices/.../enable_pullup +Date: June 2011 +KernelVersion: 2.6.35 +Contact: Bibek Basu +Description: + The /sys/devices/.../ab5500-sim.4/enable_pullup attribute allows + the user space to configure if internal pull up in SIMIO lines + has to be enabled or disabled. For enabling write 1 to the file + and 0 for disabling + + +What: /sys/devices/.../dat_pullup +Date: June 2011 +KernelVersion: 2.6.35 +Contact: Bibek Basu +Description: + The /sys/devices/.../ab5500-sim.4/dat_pullup attribute allows + the user space to configure the resistance value for internal + pull up in SIMIO lines. Following value can be written on the file + 0 SIM_DAT pull-up disabled + 1 SIM_DAT pull-up 4kOhm + 2 SIM_DAT pull-up 5kOhm + 3 SIM_DAT pull-up 6kOhm + 4 SIM_DAT pull-up 7kOhm + 5 SIM_DAT pull-up 8kOhm + 6 SIM_DAT pull-up 9kOhm + 7 SIM_DAT pull-up 10kOhm + +What: /sys/devices/.../mode_sel +Date: June 2011 +KernelVersion: 2.6.35 +Contact: Bibek Basu +Description: + The /sys/devices/.../ab5500-sim.4/mode_sel attribute allows + the user space to configure the mode at which the level shifter + will work. Following value can be written on the file + 0 TG mode and LI mode off + 1 TG mode on + 2 LI mode on + 3 TG mode and LI mode off + +What: /sys/devices/.../load_sel +Date: June 2011 +KernelVersion: 2.6.35 +Contact: Bibek Basu +Description: + The /sys/devices/.../ab5500-sim.4/load_sel attribute allows + the user space to configure the load on the USBUICC lines. + Following value can be written on the file. + 0 Data line load < 21pF + 1 Data line load 21-30pF + +What: /sys/devices/.../weak_pulldforce +Date: June 2011 +KernelVersion: 2.6.35 +Contact: Bibek Basu +Description: + The /sys/devices/.../ab5500-sim.4/weak_pulldforce attribute allows + the user space to configure the weak pull down on the USBUICC lines. + Following value can be written on the file. + 0 USB-UICC data lines weak pull down active + 1 USB-UICC data lines weak pull down not active + +What: /sys/devices/.../simoff_int +Date: June 2011 +KernelVersion: 2.6.35 +Contact: Bibek Basu +Description: + The /sys/devices/.../ab5500-sim.4/simoff_int attribute allows + the user space to poll this file and get notified in case a sim + hot swap has happened. a zero means sim extracetd and a one means + inserted. + + -- cgit v1.2.3 From 4ee4f6cc3ac5743380c100bc90d16e5f3242f94f Mon Sep 17 00:00:00 2001 From: Kumar Sanghvi Date: Thu, 19 May 2011 14:14:52 +0530 Subject: u8500: shrm: Add support for CIQ L2Mux channel Adds support for the CIQ L2Mux channel ST-Ericsson ID: CR334399 Change-Id: Ib189a1090c11b3537fafd6f3b9bc8becf1c63c2f Signed-off-by: Kumar Sanghvi Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23373 Reviewed-by: QATEST Tested-by: Sean SANDOVAL Reviewed-by: Srinidhi KASAGAR --- drivers/char/shrm_char.c | 24 +++++++++++++++++++++--- drivers/modem/shrm/shrm_protocol.c | 4 +++- include/linux/modem/shrm/shrm_driver.h | 2 +- include/linux/modem/shrm/shrm_private.h | 1 + 4 files changed, 26 insertions(+), 5 deletions(-) diff --git a/drivers/char/shrm_char.c b/drivers/char/shrm_char.c index 31f1fedd704..fa44b469b98 100644 --- a/drivers/char/shrm_char.c +++ b/drivers/char/shrm_char.c @@ -25,8 +25,8 @@ #define NAME "IPC_ISA" -/* L2 header for common loopback device is 0xc0 and hence 0xc0+1 = 193*/ -#define MAX_L2_HEADERS 193 +/* L2 header for ciq device is 0xc3 and hence 0xc3+1 = 196*/ +#define MAX_L2_HEADERS 196 #define SIZE_OF_FIFO (512*1024) @@ -49,6 +49,7 @@ static struct map_device map_dev[] = { {SECURITY_MESSAGING, 3, "sec"}, {COMMON_LOOPBACK_MESSAGING, 4, "common_loopback"}, {AUDIO_LOOPBACK_MESSAGING, 5, "audio_loopback"}, + {CIQ_MESSAGING, 6, "ciq"}, }; /* @@ -483,6 +484,10 @@ ssize_t isa_write(struct file *filp, const char __user *buf, dev_dbg(shrm->dev, "Audio loopback\n"); addr = isadev->addr; break; + case CIQ_MESSAGING: + dev_dbg(shrm->dev, "CIQ\n"); + addr = isadev->addr; + break; default: dev_dbg(shrm->dev, "Wrong device\n"); return -EFAULT; @@ -637,6 +642,10 @@ static int isa_close(struct inode *inode, struct file *filp) kfree(isadev->addr); dev_info(shrm->dev, "Close AUDIO_LOOPBACK_MESSAGING Device\n"); break; + case CIQ_MESSAGING: + kfree(isadev->addr); + dev_info(shrm->dev, "Close CIQ_MESSAGING Device\n"); + break; default: dev_info(shrm->dev, "No such device present\n"); mutex_unlock(&isa_lock); @@ -683,7 +692,8 @@ static int isa_open(struct inode *inode, struct file *filp) (m != AUDIO_LOOPBACK_MESSAGING) && (m != COMMON_LOOPBACK_MESSAGING) && (m != AUDIO_MESSAGING) && - (m != SECURITY_MESSAGING)) { + (m != SECURITY_MESSAGING) && + (m != CIQ_MESSAGING)) { dev_err(shrm->dev, "No such device present\n"); mutex_unlock(&isa_lock); return -ENODEV; @@ -729,6 +739,14 @@ static int isa_open(struct inode *inode, struct file *filp) } dev_info(shrm->dev, "Open AUDIO_LOOPBACK_MESSAGING Device\n"); break; + case CIQ_MESSAGING: + isadev->addr = kzalloc(10 * 1024, GFP_KERNEL); + if (!isadev->addr) { + mutex_unlock(&isa_lock); + return -ENOMEM; + } + dev_info(shrm->dev, "Open CIQ_MESSAGING Device\n"); + break; }; mutex_unlock(&isa_lock); diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index 99a58aa6f71..14fe28ca267 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -29,6 +29,7 @@ #define L2_HEADER_COMMON_ADVANCED_LOOPBACK 0xC1 #define L2_HEADER_AUDIO_SIMPLE_LOOPBACK 0x80 #define L2_HEADER_AUDIO_ADVANCED_LOOPBACK 0x81 +#define L2_HEADER_CIQ 0xC3 #define MAX_PAYLOAD 1024 static u8 boot_state = BOOT_INIT; @@ -993,7 +994,8 @@ int shm_write_msg(struct shrm_dev *shrm, u8 l2_header, (l2_header == L2_HEADER_RPC) || (l2_header == L2_HEADER_SECURITY) || (l2_header == L2_HEADER_COMMON_SIMPLE_LOOPBACK) || - (l2_header == L2_HEADER_COMMON_ADVANCED_LOOPBACK)) { + (l2_header == L2_HEADER_COMMON_ADVANCED_LOOPBACK) || + (l2_header == L2_HEADER_CIQ)) { channel = 0; if (shrm_common_tx_state == SHRM_SLEEP_STATE) shrm_common_tx_state = SHRM_PTR_FREE; diff --git a/include/linux/modem/shrm/shrm_driver.h b/include/linux/modem/shrm/shrm_driver.h index f662a0c4533..e7b87005565 100644 --- a/include/linux/modem/shrm/shrm_driver.h +++ b/include/linux/modem/shrm/shrm_driver.h @@ -24,7 +24,7 @@ #include #include -#define ISA_DEVICES 6 +#define ISA_DEVICES 7 #define BOOT_INIT (0) #define BOOT_INFO_SYNC (1) diff --git a/include/linux/modem/shrm/shrm_private.h b/include/linux/modem/shrm/shrm_private.h index 2063f6d6e8e..888a7c200fd 100644 --- a/include/linux/modem/shrm/shrm_private.h +++ b/include/linux/modem/shrm/shrm_private.h @@ -46,6 +46,7 @@ #define SECURITY_MESSAGING (3) #define COMMON_LOOPBACK_MESSAGING (0xC0) #define AUDIO_LOOPBACK_MESSAGING (0x80) +#define CIQ_MESSAGING (0xC3) #define COMMON_CHANNEL 0 #define AUDIO_CHANNEL 1 -- cgit v1.2.3 From 2badb9d6875ce26106bee1d2e7ce1dc98557be23 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Mon, 23 May 2011 11:43:41 +0530 Subject: U8500 : driver for awaking modem on sim hot swap activity This driver uses GPIO to detect SIM hot swap and uses Modem Access Framework to wake up modem. ST-Ericsson Linux next: 336280 ST-Ericsson ID: 329459 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: Ib4b1f67422317850f5d859ddf4c5e457f4cb616c Signed-off-by: Bibek Basu Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/23543 Reviewed-by: QATEST Reviewed-by: Jonas ABERG --- arch/arm/mach-ux500/include/mach/sim_detect.h | 16 +++ drivers/misc/sim_detect.c | 163 ++++++++++++++++++++++++++ 2 files changed, 179 insertions(+) create mode 100644 arch/arm/mach-ux500/include/mach/sim_detect.h create mode 100644 drivers/misc/sim_detect.c diff --git a/arch/arm/mach-ux500/include/mach/sim_detect.h b/arch/arm/mach-ux500/include/mach/sim_detect.h new file mode 100644 index 00000000000..8d6e81f1e8a --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/sim_detect.h @@ -0,0 +1,16 @@ +/* + * Copyright ST-Ericsson 2010 SA. + * + * Author: Bibek Basu + * Licensed under GPLv2. + */ + +#ifndef _AB8500_SIM_DETECT_H +#define _AB8500_SIM_DETECT_H + +struct sim_detect_platform_data { + int irq_num; +}; + +#endif + diff --git a/drivers/misc/sim_detect.c b/drivers/misc/sim_detect.c new file mode 100644 index 00000000000..24862edfca7 --- /dev/null +++ b/drivers/misc/sim_detect.c @@ -0,0 +1,163 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * Author: BIBEK BASU + * License terms: GNU General Public License (GPL) version 2 + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* time in millisec */ +#define TIMER_DELAY 10 +struct sim_detect{ + struct work_struct timer_expired; + struct device *dev; + struct modem *modem; + struct hrtimer timer; +}; + +static void inform_modem_release(struct work_struct *work) +{ + struct sim_detect *sim_detect = + container_of(work, struct sim_detect, timer_expired); + + /* call Modem Access Framework api to release modem */ + modem_release(sim_detect->modem); +} + +static enum hrtimer_restart timer_callback(struct hrtimer *timer) +{ + struct sim_detect *sim_detect = + container_of(timer, struct sim_detect, timer); + + schedule_work(&sim_detect->timer_expired); + return HRTIMER_NORESTART; +} + +static irqreturn_t sim_activity_irq(int irq, void *dev) +{ + struct sim_detect *sim_detect = dev; + + /* call Modem Access Framework api to acquire modem */ + modem_request(sim_detect->modem); + /* start the timer for 10ms */ + hrtimer_start(&sim_detect->timer, + ktime_set(0, TIMER_DELAY*NSEC_PER_MSEC), + HRTIMER_MODE_REL); + return IRQ_HANDLED; +} + +#ifdef CONFIG_PM +/** + * sim_detect_suspend() - This routine puts the Sim detect in to sustend state. + * @dev: pointer to device structure. + * + * This routine checks the current ongoing communication with Modem by + * examining the modem_get_usage and work_pending state. + * accordingly prevents suspend if modem communication + * is on-going. + */ +int sim_detect_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct sim_detect *sim_detect = platform_get_drvdata(pdev); + + dev_dbg(&pdev->dev, "%s called...\n", __func__); + /* if modem is accessed, event system suspend */ + if (modem_get_usage(sim_detect->modem) + || work_pending(&sim_detect->timer_expired)) + return -EBUSY; + else + return 0; +} + +static const struct dev_pm_ops sim_detect_dev_pm_ops = { + .suspend = sim_detect_suspend, +}; +#endif + +static int __devinit sim_detect_probe(struct platform_device *pdev) +{ + struct sim_detect_platform_data *plat = dev_get_platdata(&pdev->dev); + struct sim_detect *sim_detect; + int ret; + + sim_detect = kzalloc(sizeof(struct sim_detect), GFP_KERNEL); + if (sim_detect == NULL) { + dev_err(&pdev->dev, "failed to allocate memory\n"); + return -ENOMEM; + } + sim_detect->dev = &pdev->dev; + INIT_WORK(&sim_detect->timer_expired, inform_modem_release); + hrtimer_init(&sim_detect->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + sim_detect->timer.function = timer_callback; + sim_detect->modem = modem_get(sim_detect->dev, "u8500-shrm-modem"); + if (IS_ERR(sim_detect->modem)) { + ret = PTR_ERR(sim_detect->modem); + dev_err(sim_detect->dev, "Could not retrieve the modem\n"); + goto out_free; + } + platform_set_drvdata(pdev, sim_detect); + ret = request_threaded_irq(plat->irq_num, + NULL, sim_activity_irq, + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, + "sim activity", sim_detect); + if (ret < 0) + goto out_free_irq; +out_free_irq: + modem_put(sim_detect->modem); + platform_set_drvdata(pdev, NULL); +out_free: + kfree(sim_detect); + return ret; +} + +static int __devexit sim_detect_remove(struct platform_device *pdev) +{ + struct sim_detect *sim_detect = platform_get_drvdata(pdev); + + modem_put(sim_detect->modem); + platform_set_drvdata(pdev, NULL); + kfree(sim_detect); + return 0; +} + +static struct platform_driver sim_detect_driver = { + .driver = { + .name = "sim_detect", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &sim_detect_dev_pm_ops, +#endif + }, + .probe = sim_detect_probe, + .remove = __devexit_p(sim_detect_remove), +}; + +static int __init sim_detect_init(void) +{ + return platform_driver_register(&sim_detect_driver); +} +module_init(sim_detect_init); + +static void __exit sim_detect_exit(void) +{ + platform_driver_unregister(&sim_detect_driver); +} +module_exit(sim_detect_exit); + +MODULE_AUTHOR("BIBEK BASU "); +MODULE_DESCRIPTION("Detects SIM Hot Swap and wakes modem"); +MODULE_ALIAS("SIM DETECT INTERRUPT driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3 From 2840074a2f167826fb9ab84c8a450b0078052eab Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Thu, 23 Jun 2011 15:33:21 +0530 Subject: U8500: change GPIO for SIM activity detection driver This patch solves two things. One is to move to AB8500 GPIO for sim activity detection and another is to fix the missing return in driver probe. ST-Ericsson Linux next: 336280 ST-Ericsson ID: 349042 ST-Ericsson FOSS-OUT ID: Trivial Signed-off-by: Bibek Basu Change-Id: Idd4c2b0877c9d8a1590b4e866efa61377963fb93 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/25770 Reviewed-by: QATEST Reviewed-by: Jonas ABERG --- drivers/misc/sim_detect.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/misc/sim_detect.c b/drivers/misc/sim_detect.c index 24862edfca7..c267fe95ee3 100644 --- a/drivers/misc/sim_detect.c +++ b/drivers/misc/sim_detect.c @@ -115,6 +115,7 @@ static int __devinit sim_detect_probe(struct platform_device *pdev) "sim activity", sim_detect); if (ret < 0) goto out_free_irq; + return 0; out_free_irq: modem_put(sim_detect->modem); platform_set_drvdata(pdev, NULL); -- cgit v1.2.3 From ff5623436bc82be4b8ebf4d45ecfd79cbc597925 Mon Sep 17 00:00:00 2001 From: Robert Marklund Date: Fri, 12 Aug 2011 11:46:36 +0200 Subject: Doc: Fixing documentation for html generation Change documentation to align with header files and source file renames and move. Change-Id: I8e67e41e90dfb61255db5e2e84ead09972361c1c Signed-off-by: Robert Marklund --- Documentation/DocBook/shrm.tmpl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/DocBook/shrm.tmpl b/Documentation/DocBook/shrm.tmpl index 2773b821bf5..b93bb065172 100644 --- a/Documentation/DocBook/shrm.tmpl +++ b/Documentation/DocBook/shrm.tmpl @@ -104,7 +104,7 @@ This Section lists the API's provided by the SHRM driver to phonet drivers. -!Edrivers/net/u8500_shrm.c +!Edrivers/modem/shrm/shrm_fifo.c This Section lists the API's provided by the SHRM driver used in transmission of RPC, AUDIO and SECURITY messages. -- cgit v1.2.3 From 2359346e8a92c75f391f42a6c11d29af8147e6a0 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Wed, 17 Aug 2011 09:11:17 +0530 Subject: ux500_ing05160_mailboxLD_0.1 : coverity fix in ab5500 core and mailbox commit id : I57e11eeb : U5500 : coverity fix in ab5500 core and mailbox Build and boot test only done for 8500 config Booting will only happend properly if used Initramfs Change-Id: If4f6c8d50499d67128694a91517f7aae8c152653 Signed-off-by: Bibek Basu Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/28898 --- drivers/misc/mbox_channels-db5500.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/misc/mbox_channels-db5500.c b/drivers/misc/mbox_channels-db5500.c index 1fb883f3296..0d0e16ebb74 100644 --- a/drivers/misc/mbox_channels-db5500.c +++ b/drivers/misc/mbox_channels-db5500.c @@ -668,12 +668,13 @@ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) spin_lock(&mbox_unit->rx_lock); list_del(&rx_chan->list); spin_unlock(&mbox_unit->rx_lock); + mutex_unlock(&rx_chan->lock); kfree(rx_chan); } else { rx_chan->seq_number++; rx_chan->state = MBOX_OPEN; + mutex_unlock(&rx_chan->lock); } - mutex_unlock(&rx_chan->lock); exit: return res; } @@ -1036,7 +1037,6 @@ static int mboxtest_prepare(struct mboxtest_data *mboxtest) registration_done = true; return 0; err: - kfree(mboxtest); return err; } -- cgit v1.2.3 From 411ae90549e1d444a3c87aeef5cc1412e027a6e5 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Wed, 17 Aug 2011 09:34:34 +0530 Subject: ux500_ing05160_mailboxLD_0.1 : Mailbox Logical driver update Commit ID : I6af14884 :U5500 : Mailbox Logical driver update Build and boot test only done for 8500 config Booting will only happend properly if used Initramfs Signed-off-by: Bibek Basu Change-Id: I9fbd96cd73670649fb11aa467a6a2c23153b3040 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/28906 --- drivers/misc/mbox_channels-db5500.c | 216 +++++++++++++++++++++++++----------- 1 file changed, 150 insertions(+), 66 deletions(-) diff --git a/drivers/misc/mbox_channels-db5500.c b/drivers/misc/mbox_channels-db5500.c index 0d0e16ebb74..6bd4afa5fe2 100644 --- a/drivers/misc/mbox_channels-db5500.c +++ b/drivers/misc/mbox_channels-db5500.c @@ -52,10 +52,7 @@ #define GET_SEQ_NUMBER(mbox_msg) (((mbox_msg) >> 24) /* Number of buffers */ -#define NUM_DSP_BUFFER 3 - -/* circular buffer indicator */ -static int buffer_index; +#define NUM_DSP_BUFFER 4 enum mbox_msg{ MBOX_CLOSE, @@ -140,7 +137,22 @@ struct rx_channel { u8 length; }; -/* This structure holds status of mbox channel - common for tx and rx */ +/** + * struct channel_status - status of mbox channel - common for tx and rx + * @list : holds list of channels registered + * @channel : holds channel number + * @state : holds state of channel + * @cb: holds callback function forr rx channel + * @with_ack : holds if ack is needed + * @rx: holds pointer to rx_channel + * @tx : holds pointer to tx_channel + * @receive_wq : holds pointer to receive workqueue_struct + * @cast_wq : holds pointer to cast workqueue_struct + * @open_msg: holds work_struct for open msg + * @receive_msg : holds work_struct for receive msg + * @cast_msg: holds work_struct for cast msg + * @lock: holds lock for channel + */ struct channel_status { struct list_head list; u16 channel; @@ -151,8 +163,10 @@ struct channel_status { bool with_ack; struct rx_channel rx; struct tx_channel tx; - struct work_struct receive_msg; + struct workqueue_struct *receive_wq; + struct workqueue_struct *cast_wq; struct work_struct open_msg; + struct work_struct receive_msg; struct work_struct cast_msg; struct mutex lock; }; @@ -318,7 +332,8 @@ static int send_pdu(struct channel_status *chan_status, int command, chan_status->priv); else dev_err(&channels.pdev->dev, - "%s no callback provided\n", __func__); + "%s no callback provided:header 0x%x\n", + __func__, header); /* Increment sequence number */ chan_status->seq_number++; @@ -351,15 +366,12 @@ void mbox_handle_receive_msg(struct work_struct *work) /* Call client's callback and reset state */ if (rx_chan->cb) { static int rx_pending_count; - + rx_chan->cb(rx_pending[rx_pending_count].buffer, + rx_pending[rx_pending_count].length, + rx_pending[rx_pending_count].priv); + rx_pending_count++; if (rx_pending_count == NUM_DSP_BUFFER) rx_pending_count = 0; - else - rx_pending_count++; - rx_chan->cb(rx_pending[rx_pending_count].buffer, - rx_pending[rx_pending_count].length, - rx_pending[rx_pending_count].priv); - buffer_index--; } else { dev_err(&channels.pdev->dev, "%s no callback provided\n", __func__); @@ -392,35 +404,16 @@ void mbox_handle_cast_msg(struct work_struct *work) } } -static bool handle_receive_msg(u32 mbox_msg, struct list_head *rx_list) +static bool handle_receive_msg(u32 mbox_msg, struct channel_status *rx_chan) { - struct list_head *pos; - struct channel_status *tmp; int i; static int rx_pending_count; - struct channel_status *rx_chan = NULL; - struct mbox_unit_status *mbox_unit = container_of(rx_list, - struct mbox_unit_status, - rx_chans); - spin_lock(&mbox_unit->rx_lock); - list_for_each(pos, rx_list) { - tmp = list_entry(pos, struct channel_status, list); - if (tmp->state == MBOX_SEND || - tmp->state == MBOX_CAST) - /* Received message is payload */ - rx_chan = tmp; - } - /* Received message is header */ - spin_unlock(&mbox_unit->rx_lock); + if (rx_chan) { /* Store received data in RX channel buffer */ rx_chan->rx.buffer[rx_chan->rx.index++] = mbox_msg; /* Check if it's last data of PDU */ if (rx_chan->rx.index == rx_chan->rx.length) { - if (rx_pending_count == NUM_DSP_BUFFER) - rx_pending_count = 0; - else - rx_pending_count++; for (i = 0; i < MAILBOX_NR_OF_DATAWORDS; i++) { rx_pending[rx_pending_count].buffer[i] = rx_chan->rx.buffer[i]; @@ -432,11 +425,11 @@ static bool handle_receive_msg(u32 mbox_msg, struct list_head *rx_list) rx_chan->rx.length = 0; rx_chan->state = MBOX_OPEN; rx_chan->seq_number++; - buffer_index++; - if (buffer_index >= NUM_DSP_BUFFER) - dev_err(&channels.pdev->dev, - "rxbuf overflow%d\n", buffer_index); - schedule_work(&rx_chan->receive_msg); + rx_pending_count++; + if (rx_pending_count == NUM_DSP_BUFFER) + rx_pending_count = 0; + queue_work(rx_chan->receive_wq, + &rx_chan->receive_msg); } dev_dbg(&channels.pdev->dev, "%s OK\n", __func__); return true; @@ -453,7 +446,7 @@ static void handle_open_msg(u16 channel, u8 mbox_id) channel = get_tx_channel(channel); dev_dbg(&channels.pdev->dev, "%s mbox_id %d\tchannel %x\n", __func__, mbox_id, channel); - /* Get TX channesenx for given mbox unit */ + /* Get TX channel for given mbox unit */ tx_list = get_tx_list(mbox_id); if (tx_list == NULL) { dev_err(&channels.pdev->dev, "given mbox id is not valid %d\n", @@ -497,25 +490,10 @@ static void handle_open_msg(u16 channel, u8 mbox_id) } } -static void handle_cast_msg(u16 channel, struct list_head *rx_list, +static void handle_cast_msg(u16 channel, struct channel_status *rx_chan, u32 mbox_msg, bool send) { - struct list_head *pos; - struct channel_status *tmp; - struct channel_status *rx_chan = NULL; - struct mbox_unit_status *mbox_unit = container_of(rx_list, - struct mbox_unit_status, - rx_chans); dev_dbg(&channels.pdev->dev, " %s\n", __func__); - /* Search for channel in rx list */ - spin_lock(&mbox_unit->rx_lock); - list_for_each(pos, rx_list) { - tmp = list_entry(pos, struct channel_status, list); - if (tmp->channel == channel) - rx_chan = tmp; - } - spin_unlock(&mbox_unit->rx_lock); - if (rx_chan) { rx_chan->rx.buffer[0] = mbox_msg; rx_chan->with_ack = send; @@ -525,7 +503,8 @@ static void handle_cast_msg(u16 channel, struct list_head *rx_list, rx_chan->rx.index = 0; rx_chan->state = MBOX_CAST; } - schedule_work(&rx_chan->cast_msg); + queue_work(rx_chan->cast_wq, + &rx_chan->cast_msg); } else { /* Channel not found, peer sent wrong message */ dev_err(&channels.pdev->dev, "channel %d doesn't exist\n", @@ -543,6 +522,11 @@ static void mbox_cb(u32 mbox_msg, void *priv) struct list_head *rx_list; u8 type = GET_TYPE(mbox_msg); u16 channel = GET_CHANNEL(mbox_msg); + struct mbox_unit_status *mbox_unit; + struct list_head *pos; + struct channel_status *tmp; + struct channel_status *rx_chan = NULL; + bool is_Payload = 0; dev_dbg(&channels.pdev->dev, "%s type %d\t, mbox_msg %x\n", __func__, type, mbox_msg); @@ -554,9 +538,31 @@ static void mbox_cb(u32 mbox_msg, void *priv) return; } - /* If received message is payload this function will take care of it */ - if (handle_receive_msg(mbox_msg, rx_list)) - return; + mbox_unit = container_of(rx_list, struct mbox_unit_status, rx_chans); + /* Search for channel in rx list */ + spin_lock(&mbox_unit->rx_lock); + list_for_each(pos, rx_list) { + tmp = list_entry(pos, struct channel_status, list); + if (tmp->state == MBOX_SEND || + tmp->state == MBOX_CAST) { + /* Received message is payload */ + is_Payload = 1; + rx_chan = tmp; + } else + if (tmp->channel == channel) + rx_chan = tmp; + } + spin_unlock(&mbox_unit->rx_lock); + /* if callback is present for that RX channel */ + if (rx_chan && rx_chan->cb) { + /* If received message is payload this + * function will take care of it + */ + if ((is_Payload) && (handle_receive_msg(mbox_msg, rx_chan))) + return; + } else + dev_err(&channels.pdev->dev, "callback not present:msg 0x%x " + "rx_chan 0x%x\n", mbox_msg, (u32)rx_chan); /* Received message is header as no RX channel is in SEND/CAST state */ switch (type) { @@ -567,10 +573,14 @@ static void mbox_cb(u32 mbox_msg, void *priv) handle_open_msg(channel, mbox_id); break; case MBOX_SEND: - handle_cast_msg(channel, rx_list, mbox_msg, true); + /* if callback is present for that RX channel */ + if (rx_chan && rx_chan->cb) + handle_cast_msg(channel, rx_chan, mbox_msg, true); break; case MBOX_CAST: - handle_cast_msg(channel, rx_list, mbox_msg, false); + /* if callback is present for that RX channel */ + if (rx_chan && rx_chan->cb) + handle_cast_msg(channel, rx_chan, mbox_msg, false); break; case MBOX_ACK: case MBOX_NAK: @@ -598,10 +608,10 @@ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) struct mbox_unit_status *mbox_unit; dev_dbg(&channels.pdev->dev, " %s channel = %d\n", __func__, channel); - /* Closing of channels is not implemented */ + /* Check for callback fcn */ if (cb == NULL) { dev_err(&channels.pdev->dev, - "channel close is not implemented\n"); + "channel callback missing:channel %d\n", channel); res = -EINVAL; goto exit; } @@ -654,6 +664,18 @@ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) rx_chan->seq_number = CHANNEL_START_SEQUENCE_NUMBER; mutex_init(&rx_chan->lock); INIT_LIST_HEAD(&rx_chan->rx.pending); + rx_chan->cast_wq = create_singlethread_workqueue("mbox_cast_msg"); + if (!rx_chan->cast_wq) { + dev_err(&channels.pdev->dev, "failed to create work queue\n"); + res = -ENOMEM; + goto error_cast_wq; + } + rx_chan->receive_wq = create_singlethread_workqueue("mbox_receive_msg"); + if (!rx_chan->receive_wq) { + dev_err(&channels.pdev->dev, "failed to create work queue\n"); + res = -ENOMEM; + goto error_recv_wq; + } INIT_WORK(&rx_chan->open_msg, mbox_handle_open_msg); INIT_WORK(&rx_chan->cast_msg, mbox_handle_cast_msg); INIT_WORK(&rx_chan->receive_msg, mbox_handle_receive_msg); @@ -669,17 +691,79 @@ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) list_del(&rx_chan->list); spin_unlock(&mbox_unit->rx_lock); mutex_unlock(&rx_chan->lock); - kfree(rx_chan); + goto error_send_pdu; } else { rx_chan->seq_number++; rx_chan->state = MBOX_OPEN; mutex_unlock(&rx_chan->lock); + return res; } +error_send_pdu: + flush_workqueue(rx_chan->receive_wq); +error_recv_wq: + flush_workqueue(rx_chan->cast_wq); +error_cast_wq: + kfree(rx_chan); exit: return res; } EXPORT_SYMBOL(mbox_channel_register); +/** + * mbox_channel_deregister() - DeRegisters for a channel + * @channel: Channel Number. + * + * This routine is used to deregister for a logical channel. + * It first does sanity check on the requested channel availability + * and parameters. Then it deletes the channel + */ +int mbox_channel_deregister(u16 channel) +{ + struct channel_status *rx_chan = NULL; + struct list_head *pos, *rx_list; + int res = 0; + struct mbox_unit_status *mbox_unit; + + dev_dbg(&channels.pdev->dev, " %s channel = %d\n", __func__, channel); + /* Check if provided channel number is valid */ + if (!check_channel(channel, MBOX_RX)) { + dev_err(&channels.pdev->dev, "wrong mbox channel number %d\n", + channel); + res = -EINVAL; + goto exit; + } + + rx_list = get_rx_list(get_mbox_id(channel)); + if (rx_list == NULL) { + dev_err(&channels.pdev->dev, "given mbox id is not valid\n"); + res = -EINVAL; + goto exit; + } + + mbox_unit = container_of(rx_list, struct mbox_unit_status, rx_chans); + + /* Check if channel is already registered */ + spin_lock(&mbox_unit->rx_lock); + list_for_each(pos, rx_list) { + rx_chan = list_entry(pos, struct channel_status, list); + + if (rx_chan->channel == channel) { + dev_dbg(&channels.pdev->dev, + "channel found\n"); + rx_chan->cb = NULL; + } + } + list_del(&rx_chan->list); + spin_unlock(&mbox_unit->rx_lock); + flush_workqueue(rx_chan->cast_wq); + flush_workqueue(rx_chan->receive_wq); + kfree(rx_chan); + +exit: + return res; +} +EXPORT_SYMBOL(mbox_channel_deregister); + /** * mbox_channel_send() - Send messages * @msg: Pointer to mbox_channel_msg data structure. -- cgit v1.2.3 From 25efdcfdd69dba4ce19828b707588d3b6f9c836a Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Wed, 17 Aug 2011 13:45:01 +0530 Subject: ux500_ing05160_ab5500_sim_0.1: fix the resource leak Commit id : I70c297af: staging ab5500-sim: fix the resource leak Build and boot test only done for 8500 config Booting will only happend properly if used Initramfs Signed-off-by: Bibek Basu Change-Id: I8edbdb1dbf4282b8bfa4e6b5a3f4b0ca2b460138 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/28916 --- drivers/staging/ab5500_sim/ab5500-sim.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/staging/ab5500_sim/ab5500-sim.c b/drivers/staging/ab5500_sim/ab5500-sim.c index 788a7984a46..3f4ae7cd34a 100644 --- a/drivers/staging/ab5500_sim/ab5500-sim.c +++ b/drivers/staging/ab5500_sim/ab5500-sim.c @@ -230,14 +230,16 @@ static int __devinit ab5500_sim_probe(struct platform_device *pdev) int irq; struct ab5500_sim *di = kzalloc(sizeof(struct ab5500_sim), GFP_KERNEL); - if (!di) - return -ENOMEM; - + if (!di) { + ret = -ENOMEM; + goto error_alloc; + } dev_info(&pdev->dev, "ab5500_sim_driver PROBE\n"); irq = platform_get_irq_byname(pdev, "SIMOFF"); if (irq < 0) { dev_err(&pdev->dev, "Get irq by name failed\n"); - return irq; + ret = irq; + goto exit; } di->irq_base = irq; di->dev = &pdev->dev; @@ -246,13 +248,14 @@ static int __devinit ab5500_sim_probe(struct platform_device *pdev) /* sysfs interface to configure sim reg from user space */ if (sysfs_create_group(&pdev->dev.kobj, &ab5500sim_attr_grp) < 0) { dev_err(&pdev->dev, " Failed creating sysfs group\n"); - return -ENOMEM; + ret = -ENOMEM; + goto error_sysfs; } ret = request_threaded_irq(irq, NULL, ab5500_sim_irq_handler, IRQF_NO_SUSPEND , "ab5500-sim", pdev); if (ret < 0) { dev_err(&pdev->dev, "Request threaded irq failed (%d)\n", ret); - goto exit; + goto error_irq; } /* this is the contiguous irq for sim removal,falling edge */ irq = irq + 1; @@ -261,13 +264,16 @@ static int __devinit ab5500_sim_probe(struct platform_device *pdev) if (ret < 0) { dev_err(&pdev->dev, "Request threaded irq failed (%d)\n", ret); free_irq(--irq, di); - goto exit; + goto error_irq; } return ret; -exit: +error_irq: sysfs_remove_group(&pdev->dev.kobj, &ab5500sim_attr_grp); +error_sysfs: platform_set_drvdata(pdev, NULL); +exit: kfree(di); +error_alloc: return ret; } -- cgit v1.2.3 From ec2b249c253e5856ddf1b5aa923620ac243007c8 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Wed, 17 Aug 2011 15:54:00 +0530 Subject: ux500_ing05160_mailboxPD_0.1:Lockdeb correctness fix for modem_irq Commit ID: Ib94dcbf6: U5500 : Lockdeb correctness fix for modem_irq Build and boot test only done for 8500 config Booting will only happend properly if used Initramfs Change-Id: I5da03baa7b8ee8f32de5712b7136442fbe2cec1c Signed-off-by: Bibek Basu Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/28923 --- arch/arm/mach-ux500/modem-irq-db5500.c | 6 ++++-- drivers/misc/mbox.c | 13 ++++++++----- 2 files changed, 12 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-ux500/modem-irq-db5500.c b/arch/arm/mach-ux500/modem-irq-db5500.c index 6b86416c94c..52bca4eb8b6 100644 --- a/arch/arm/mach-ux500/modem-irq-db5500.c +++ b/arch/arm/mach-ux500/modem-irq-db5500.c @@ -81,7 +81,7 @@ static irqreturn_t modem_cpu_irq_handler(int irq, void *data) virt_irq); if (virt_irq != 0) - generic_handle_irq(virt_irq); + handle_nested_irq(virt_irq); pr_debug("modem_irq: Done handling virtual IRQ %d!\n", virt_irq); @@ -91,6 +91,7 @@ static irqreturn_t modem_cpu_irq_handler(int irq, void *data) static void create_virtual_irq(int irq, struct irq_chip *modem_irq_chip) { irq_set_chip_and_handler(irq, modem_irq_chip, handle_simple_irq); + irq_set_nested_thread(irq, 1); set_irq_flags(irq, IRQF_VALID); pr_debug("modem_irq: Created virtual IRQ %d\n", irq); @@ -131,7 +132,8 @@ static int modem_irq_init(void) create_virtual_irq(MBOX_PAIR2_VIRT_IRQ, &modem_irq_chip); err = request_threaded_irq(IRQ_DB5500_MODEM, NULL, - modem_cpu_irq_handler, IRQF_ONESHOT, + modem_cpu_irq_handler, + IRQF_ONESHOT | IRQF_ONESHOT, "modem_irq", mi); if (err) pr_err("modem_irq: Could not register IRQ %d\n", diff --git a/drivers/misc/mbox.c b/drivers/misc/mbox.c index 2b2d51caf9d..b2810718822 100644 --- a/drivers/misc/mbox.c +++ b/drivers/misc/mbox.c @@ -69,8 +69,9 @@ static struct mbox *get_mbox_with_id(u8 id) int mbox_send(struct mbox *mbox, u32 mbox_msg, bool block) { int res = 0; + unsigned long flag; - spin_lock(&mbox->lock); + spin_lock_irqsave(&mbox->lock, flag); dev_dbg(&(mbox->pdev->dev), "About to buffer 0x%X to mailbox 0x%X." @@ -87,14 +88,14 @@ int mbox_send(struct mbox *mbox, u32 mbox_msg, bool block) res = -ENOMEM; goto exit; } - spin_unlock(&mbox->lock); + spin_unlock_irqrestore(&mbox->lock, flag); dev_dbg(&(mbox->pdev->dev), "Buffer full in blocking call! Sleeping...\n"); mbox->client_blocked = 1; wait_for_completion(&mbox->buffer_available); dev_dbg(&(mbox->pdev->dev), "Blocking send was woken up! Trying again...\n"); - spin_lock(&mbox->lock); + spin_lock_irqsave(&mbox->lock, flag); } mbox->buffer[mbox->write_index] = mbox_msg; @@ -107,7 +108,7 @@ int mbox_send(struct mbox *mbox, u32 mbox_msg, bool block) writel(MBOX_ENABLE_IRQ, mbox->virtbase_peer + MBOX_FIFO_THRES_FREE); exit: - spin_unlock(&mbox->lock); + spin_unlock_irqrestore(&mbox->lock, flag); return res; } EXPORT_SYMBOL(mbox_send); @@ -462,7 +463,9 @@ struct mbox *mbox_setup(u8 mbox_id, mbox_recv_cb_t *mbox_cb, void *priv) } dev_dbg(&(mbox->pdev->dev), "Allocating irq %d...\n", irq); - res = request_irq(irq, mbox_irq, 0, mbox->name, (void *) mbox); + res = request_threaded_irq(irq, NULL, mbox_irq, + IRQF_NO_SUSPEND | IRQF_ONESHOT, + mbox->name, (void *) mbox); if (res < 0) { dev_err(&(mbox->pdev->dev), "Unable to allocate mbox irq %d\n", irq); -- cgit v1.2.3 From 2215cbd6409a561fe159f8bc3d5dd52e7714e3a8 Mon Sep 17 00:00:00 2001 From: Arun Murthy Date: Mon, 27 Jun 2011 11:07:30 +0530 Subject: u8500-shrm: memory leakage in probe function Memory leakage if getting modem access framework fails during probe. ST-Ericsson Linux next: Not Tested ST-Ericsson ID: ER349208 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I1827581aa5bdabeaf32f09b8eb1f482525785cc0 Signed-off-by: Arun Murthy Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/25869 Reviewed-by: QATEST Reviewed-by: Jonas ABERG Reviewed-by: Srinidhi KASAGAR --- drivers/modem/shrm/modem_shrm_driver.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/modem/shrm/modem_shrm_driver.c b/drivers/modem/shrm/modem_shrm_driver.c index 5e986ab9a2c..f46b86bd22e 100644 --- a/drivers/modem/shrm/modem_shrm_driver.c +++ b/drivers/modem/shrm/modem_shrm_driver.c @@ -334,7 +334,8 @@ static int shrm_probe(struct platform_device *pdev) shrm->modem = modem_get(shrm->dev, "u8500-shrm-modem"); if (shrm->modem == NULL) { dev_err(shrm->dev, " Could not retrieve the modem.\n"); - return -ENODEV; + err = -ENODEV; + goto rollback_intr; } /* initialise the SHM */ -- cgit v1.2.3 From d32124463bc63ec48e4843beff106cddc988ca89 Mon Sep 17 00:00:00 2001 From: Arun Murthy Date: Tue, 28 Jun 2011 15:33:28 +0530 Subject: u8500-shrm: display useful error message in case of failure In case of failure, prints the parameters causing the failure, which helps in debugging. ST-Ericsson Linux next: Not Tested ST-Ericsson ID: ER349776 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: Ie76025473740cfa7ffbfba0c41342d90ae7ff98e Signed-off-by: Arun Murthy Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/26013 Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR --- drivers/modem/shrm/shrm_fifo.c | 26 ++++++++++++++------------ drivers/modem/shrm/shrm_protocol.c | 3 ++- 2 files changed, 16 insertions(+), 13 deletions(-) diff --git a/drivers/modem/shrm/shrm_fifo.c b/drivers/modem/shrm/shrm_fifo.c index 883966d4ab5..9e6564aa6bc 100644 --- a/drivers/modem/shrm/shrm_fifo.c +++ b/drivers/modem/shrm/shrm_fifo.c @@ -108,6 +108,7 @@ u8 read_boot_info_req(struct shrm_dev *shrm, msgtype = (header & L1_MAPID_MASK) >> L1_MSG_MAPID_OFFSET; if (msgtype != L1_BOOT_INFO_REQ) { dev_err(shrm->dev, "Read_Boot_Info_Req Fatal ERROR\n"); + dev_err(shrm->dev, "Received msgtype is %d\n", msgtype); BUG(); } *config = (header >> CONFIG_OFFSET) & MASK_0_15_BIT; @@ -401,17 +402,17 @@ u8 read_one_l2msg_common(struct shrm_dev *shrm, if (msgtype != L1_NORMAL_MSG) { /* Fatal ERROR - should never happens */ - dev_dbg(shrm->dev, "wr_wptr= %x\n", + dev_info(shrm->dev, "wr_wptr= %x\n", fifo->reader_local_wptr); - dev_dbg(shrm->dev, "wr_rptr= %x\n", + dev_info(shrm->dev, "wr_rptr= %x\n", fifo->reader_local_rptr); - dev_dbg(shrm->dev, "shared_wptr= %x\n", + dev_info(shrm->dev, "shared_wptr= %x\n", fifo->shared_wptr); - dev_dbg(shrm->dev, "shared_rptr= %x\n", + dev_info(shrm->dev, "shared_rptr= %x\n", fifo->shared_rptr); - dev_dbg(shrm->dev, "availsize= %x\n", + dev_info(shrm->dev, "availsize= %x\n", fifo->availablesize); - dev_dbg(shrm->dev, "end_fifo= %x\n", + dev_info(shrm->dev, "end_fifo= %x\n", fifo->end_addr_fifo); /* Fatal ERROR - should never happens */ dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); @@ -506,18 +507,19 @@ u8 read_one_l2msg_audio(struct shrm_dev *shrm, if (msgtype != L1_NORMAL_MSG) { /* Fatal ERROR - should never happens */ - dev_dbg(shrm->dev, "wr_local_wptr= %x\n", + dev_info(shrm->dev, "wr_local_wptr= %x\n", fifo->reader_local_wptr); - dev_dbg(shrm->dev, "wr_local_rptr= %x\n", + dev_info(shrm->dev, "wr_local_rptr= %x\n", fifo->reader_local_rptr); - dev_dbg(shrm->dev, "shared_wptr= %x\n", + dev_info(shrm->dev, "shared_wptr= %x\n", fifo->shared_wptr); - dev_dbg(shrm->dev, "shared_rptr= %x\n", + dev_info(shrm->dev, "shared_rptr= %x\n", fifo->shared_rptr); - dev_dbg(shrm->dev, "availsize=%x\n", + dev_info(shrm->dev, "availsize=%x\n", fifo->availablesize); - dev_dbg(shrm->dev, "end_fifo= %x\n", + dev_info(shrm->dev, "end_fifo= %x\n", fifo->end_addr_fifo); + dev_info(shrm->dev, "Received msgtype is &d\n", msgtype); /* Fatal ERROR - should never happens */ dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); BUG(); diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index 14fe28ca267..d2efbc6e5fd 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -985,7 +985,8 @@ int shm_write_msg(struct shrm_dev *shrm, u8 l2_header, if (boot_state != BOOT_DONE) { dev_err(shrm->dev, - "error after boot done call this fn\n"); + "error:after boot done call this fn, L2Header = %d\n", + l2_header); ret = -ENODEV; goto out; } -- cgit v1.2.3 From ac0e6b0b5ad010363cd79fa6823e9824fc193f80 Mon Sep 17 00:00:00 2001 From: Arun Murthy Date: Wed, 17 Aug 2011 16:27:51 +0530 Subject: modem: u8500-shrm: Error case not handled properly After creation of single threaded workqueue, typo in checking the error condition. ST-Ericsson Linux next: NA ST-Ericsson ID: 356913 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: Idc89353a2848a251a71999ffb0fe61fe3f11f08a Signed-off-by: Arun Murthy Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/28928 Reviewed-by: QATOOLS Reviewed-by: Rabin VINCENT --- drivers/modem/shrm/shrm_protocol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index d2efbc6e5fd..990591faee1 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -722,7 +722,7 @@ int shrm_protocol_init(struct shrm_dev *shrm, goto free_wq2; } shrm->shm_ca_wake_wq = create_singlethread_workqueue("shm_ca_wake_req"); - if (!shrm->shm_ac_wake_wq) { + if (!shrm->shm_ca_wake_wq) { dev_err(shrm->dev, "failed to create work queue\n"); err = -ENOMEM; goto free_wq3; -- cgit v1.2.3 From 5a3e994c4a1efcb55355f17d4781ee996f0fc9e8 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Mon, 17 Oct 2011 08:48:46 +0200 Subject: ab5500: move to separate header --- drivers/staging/ab5500_sim/ab5500-sim.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/staging/ab5500_sim/ab5500-sim.c b/drivers/staging/ab5500_sim/ab5500-sim.c index 3f4ae7cd34a..d222a22ed24 100644 --- a/drivers/staging/ab5500_sim/ab5500-sim.c +++ b/drivers/staging/ab5500_sim/ab5500-sim.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include -- cgit v1.2.3 From f7943f37dd7eef9812ce8c97a97ec8c59fd3a5a0 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Thu, 20 Oct 2011 10:16:38 +0200 Subject: drivers: misc: Modem Audio Driver Mad is a Character Device Driver to read and write from special shared memory between APE and ACC side. ST-Ericsson Linux next: Not tested, ER 332152 ST-Ericsson ID: 332152 ST-Ericsson FOSS-OUT ID: STETL-FOSS-OUT-10006 Change-Id: I087f6eb799f87ebb9ed38b4c011da5f53803b161 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/26545 Reviewed-by: Amaresh MULAGE Tested-by: Amaresh MULAGE Reviewed-by: QATEST Reviewed-by: Henrik CARLING --- drivers/misc/modem_audio/Kconfig | 6 + drivers/misc/modem_audio/Makefile | 2 + drivers/misc/modem_audio/mad.c | 486 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 494 insertions(+) create mode 100644 drivers/misc/modem_audio/Kconfig create mode 100644 drivers/misc/modem_audio/Makefile create mode 100644 drivers/misc/modem_audio/mad.c diff --git a/drivers/misc/modem_audio/Kconfig b/drivers/misc/modem_audio/Kconfig new file mode 100644 index 00000000000..5396868a9de --- /dev/null +++ b/drivers/misc/modem_audio/Kconfig @@ -0,0 +1,6 @@ +config MODEM_AUDIO_DRIVER + bool "Modem Audio Driver" + depends on (U5500_MBOX && UX500_SOC_DB5500) + help + This module is used for read and write data between APE and + Access side in u5500 platform. diff --git a/drivers/misc/modem_audio/Makefile b/drivers/misc/modem_audio/Makefile new file mode 100644 index 00000000000..a5c1740ea48 --- /dev/null +++ b/drivers/misc/modem_audio/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_MODEM_AUDIO_DRIVER) += mad.o + diff --git a/drivers/misc/modem_audio/mad.c b/drivers/misc/modem_audio/mad.c new file mode 100644 index 00000000000..e9284b66dab --- /dev/null +++ b/drivers/misc/modem_audio/mad.c @@ -0,0 +1,486 @@ +/* + * Copyright (C) ST-Ericsson AB 2011 + * + * Modem Audio Driver + * + * Author:Rahul Venkatram for ST-Ericsson + * Haridhar KALVALA for ST-Ericsson + * Amaresh Mulage for ST-Ericsson. + * + * License terms:GNU General Public License (GPLv2)version 2 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_DESCRIPTION("Modem Audio Driver"); +MODULE_LICENSE("GPLv2"); + +/** + * ----------------------------------------------------- + * | | | | + * | Data[0] |Data[1] |Data[2] |===>Data word 32 bits + * ----------------------------------------------------- + * | MESSAGE |Data | Index | + * | TYPE |length | number |===>READ/WRITE message + * ----------------------------------------------------- + * ----------------------------------------------------- + * | MESSAGE | DSP SHM addr | max_no_of_buffers |===> READ + * | TYPE | to write data | ||buffersize |WRITE SETUP message + * ----------------------------------------------------- + */ + + +#define MAD_NAME "mad" +/* Bit mask */ +#define MASK_UPPER_WORD 0xFFFF + +/* channel values for each direction */ +#define CHANNEL_NUM_RX 0x500 +#define CHANNEL_NUM_TX 0x900 + +/* + * Maximum number of datawords which can be sent + * in the mailbox each word is 32 bits + */ +#define MAX_NR_OF_DATAWORDS 3 +#define MAX_NUM_RX_BUFF 4 +#define NR_OF_DATAWORDS_REQD_FOR_ACK 1 + +/** + * Message types, must be identical in DSP Side + * VCS_MBOX_MSG_WRITE_IF_SETUP : DSP -> ARM + * VCS_MBOX_MSG_WRITE_IF_SETUP_ACK : ARM -> DSP + * VCS_MBOX_MSG_READ_IF_SETUP : DSP -> ARM + * VCS_MBOX_MSG_READ_IF_SETUP_ACK : ARM -> DSP + * VCS_MBOX_MSG_IF_ENC_DATA : ARM -> DSP + * VCS_MBOX_MSG_IF_DEC_DATA : DSP -> ARM + */ +#define VCS_MBOX_MSG_WRITE_IF_SETUP 0x200 +#define VCS_MBOX_MSG_WRITE_IF_SETUP_ACK 0x201 +#define VCS_MBOX_MSG_READ_IF_SETUP 0x400 +#define VCS_MBOX_MSG_READ_IF_SETUP_ACK 0x401 +#define VCS_MBOX_MSG_IF_ENC_DATA 0x80 +#define VCS_MBOX_MSG_IF_DEC_DATA 0x100 + +/** + * struct mad_data - This structure holds the state of the Modem Audio Driver. + * + * @dsp_shm_write_ptr : Ptr to the first TX buffer in DSP + * @dsp_shm_read_ptr : Ptr to the first RX buffer in DSP + * @max_tx_buffs : No. of DSP buffers available to write + * @max_rx_buffs : No. of DSP buffers available to read + * @write_offset : Size of each buffer in the DSP + * @read_offset : Size of each buffer in the DSP + * @rx_buff : Buffer for incoming data + * @tx_buff : Buffer for outgoing data + * @tx_buffer_num : Buffer counter for writing to DSP + * @rx_buffer_num : Buffer counter for reading to DSP + * @rx_buffer_read : Buffer counter for reading from userspace + * @data_written : RX data message arrival indicator + * @read_setup_msg : flag for opening read data + * @readq : read queue of data message + * @lock : lock for r/w message queue + */ +struct mad_data { + void __iomem *dsp_shm_write_ptr; + void __iomem *dsp_shm_read_ptr; + int max_tx_buffs; + int max_rx_buffs; + int write_offset; + int read_offset; + u32 *rx_buff; + u32 *tx_buff; + int tx_buffer_num; + int rx_buffer_num; + int rx_buffer_read; + u32 data_written; + bool read_setup_msg; + bool open_check; + wait_queue_head_t readq; + spinlock_t lock; +}; + +static struct mad_data *mad; + +/** + * mad_send_cb - This function is default callback for send. + * @data -Pointer to the data buffer + * @len -Data buffer length + * @arg -Private data pointer associated with test + */ +static void mad_send_cb(u32 *data, u32 len, void *arg) +{ + pr_debug("%s", __func__); +} + +/** + * mad_receive_cb - This callback function is for receiving data from mailbox + * @data -Pointer to the data buffer + * @len -length of the Mailbox + * @arg -Private data pointer associated with test + */ +static void mad_receive_cb(u32 *data, u32 length, void *priv) +{ + struct mad_data *mad = priv; + struct mbox_channel_msg msg; + u32 ack_to_dsp; + unsigned long flags; + + /* setup message for write address */ + if (*data == VCS_MBOX_MSG_WRITE_IF_SETUP) { + + ack_to_dsp = VCS_MBOX_MSG_WRITE_IF_SETUP_ACK; + + /* if setup message comes again.unmap */ + if (mad->dsp_shm_write_ptr != NULL) { + iounmap(mad->dsp_shm_write_ptr); + mad->dsp_shm_write_ptr = NULL; + mad->write_offset = 0; + mad->max_tx_buffs = 0; + } + + /* convert offset to uint size */ + mad->write_offset = (data[2] & MASK_UPPER_WORD); + mad->max_tx_buffs = (data[2] >> 16); + + mad->dsp_shm_write_ptr = ioremap(data[1], + mad->max_tx_buffs * mad->write_offset); + if (mad->dsp_shm_write_ptr == NULL) + pr_err("%s :Error write address ioremap failed %X\n", + __func__ ,(u32) mad->dsp_shm_write_ptr); + + /* Initialize all buffer numbers */ + mad->tx_buffer_num = 0; + + /* Send ACK to the DSP */ + msg.channel = CHANNEL_NUM_TX; + msg.data = &ack_to_dsp; + msg.length = NR_OF_DATAWORDS_REQD_FOR_ACK; + msg.cb = mad_send_cb; + msg.priv = mad; + + if (mbox_channel_send(&msg)) + pr_err("%s: cannot send data\n", __func__); + + } /* setup message for reading SHM */ + else if (*data == VCS_MBOX_MSG_READ_IF_SETUP) { + + ack_to_dsp = VCS_MBOX_MSG_READ_IF_SETUP_ACK; + + /* if setup message comes again.unmap */ + if (mad->dsp_shm_read_ptr != NULL) { + iounmap(mad->dsp_shm_read_ptr); + mad->dsp_shm_read_ptr = NULL; + mad->read_offset = 0; + mad->max_rx_buffs = 0; + } + + /*convert offset to uint size*/ + mad->read_offset = (data[2] & MASK_UPPER_WORD); + mad->max_rx_buffs = data[2] >> 16; + + mad->dsp_shm_read_ptr = ioremap(data[1], + mad->max_rx_buffs * mad->read_offset); + + /* Initialize all buffer numbers and flags */ + mad->rx_buffer_num = 0; + mad->rx_buffer_read = 0; + mad->data_written = 0; + + /* Send ACK to the DSP */ + msg.channel = CHANNEL_NUM_TX; + msg.data = &ack_to_dsp; + msg.length = NR_OF_DATAWORDS_REQD_FOR_ACK; + msg.cb = mad_send_cb; + msg.priv = mad; + + if (mbox_channel_send(&msg)) + pr_err("%s: cannot send data\n", __func__); + + /* allow read */ + spin_lock_irqsave(&mad->lock, flags); + mad->read_setup_msg = true; + spin_unlock_irqrestore(&mad->lock, flags); + /* blocked in select() */ + wake_up_interruptible(&mad->readq); + + } else if (*data == VCS_MBOX_MSG_IF_DEC_DATA) { + /* + * Check if you have valid message with proper length in message + * otherwise Dont care + */ + if ((data[1] <= 0) || (mad->rx_buff == NULL)) { + if (mad->rx_buff == NULL) + pr_notice("%s :MAD closed", __func__); + else + pr_notice("%s : Zero size message", __func__); + } else { + mad->rx_buff[mad->rx_buffer_num] = data[1]; + mad->rx_buffer_num++; + + /* store the offset */ + mad->rx_buff[mad->rx_buffer_num] = data[2]; + + if (mad->rx_buffer_num < ((MAX_NUM_RX_BUFF * 2)-1)) + mad->rx_buffer_num++; + else + mad->rx_buffer_num = 0; + + spin_lock_irqsave(&mad->lock, flags); + mad->data_written++; + + if (mad->data_written > MAX_NUM_RX_BUFF) { + pr_notice("%s : Read msg overflow = %u\n", + mad->data_written, __func__); + /* + * Donot exceed MAX_NUM_RX_BUFF size of buffer + * TO DO overflow control + */ + mad->data_written = MAX_NUM_RX_BUFF ; + } + spin_unlock_irqrestore(&mad->lock, flags); + wake_up_interruptible(&mad->readq); + } + } else { + /* received Invalid message */ + pr_err("%s : Invalid Mesasge sent by the DSP\n ", __func__); + } +} + +static int mad_read(struct file *filp, char __user *buff, size_t count, + loff_t *offp) +{ + unsigned long flags; + unsigned int size = 0; + void __iomem *shm_ptr = NULL; + + pr_debug("%s", __func__); + + if (!(mad->data_written > 0)) { + if (wait_event_interruptible(mad->readq, + ((mad->data_written > 0) && + (mad->dsp_shm_read_ptr != NULL)))) + return -ERESTARTSYS; + } + + if (mad->dsp_shm_read_ptr == NULL) { + pr_err("%s :No Read shared memory pointer yet", __func__); + return -EINVAL ; + } + + if (mad->rx_buff[mad->rx_buffer_read] > count) { + /* + * Size of message greater than buffer , this shouldnt happen + * It shouldnt come here : we ensured that message size + * smaller that buffer length + */ + pr_err("%s : Incorrect length", __func__); + return -EFAULT; + } + size = mad->rx_buff[mad->rx_buffer_read]; + mad->rx_buff[mad->rx_buffer_read] = 0; + mad->rx_buffer_read++; + shm_ptr = (u8 *)(mad->dsp_shm_read_ptr + + (mad->rx_buff[mad->rx_buffer_read] * mad->read_offset)); + if (copy_to_user(buff, shm_ptr, size) < 0) { + pr_err("%s :Error in copy to user", __func__); + return -EFAULT; + } + + if (mad->rx_buffer_read < ((MAX_NUM_RX_BUFF*2)-1)) + mad->rx_buffer_read++; + else + mad->rx_buffer_read = 0; + + spin_lock_irqsave(&mad->lock, flags); + mad->data_written--; + if (mad->data_written < 0) { + /* Means wrong read*/ + mad->data_written = 0; + pr_err("%s :Read More than Received", __func__); + } + spin_unlock_irqrestore(&mad->lock, flags); + return size; +} + +static int mad_write(struct file *filp, const char __user *buff, size_t count, + loff_t *offp) +{ + int retval = 0; + void __iomem *dsp_write_address; + struct mbox_channel_msg msg; + + pr_debug("%s", __func__); + + /* check for valid write pointer else skip writing*/ + if (mad->dsp_shm_write_ptr == NULL) { + pr_err("%s : Illegal memory access\n", __func__); + return -EFAULT; + } + + dsp_write_address = (mad->dsp_shm_write_ptr + + (mad->tx_buffer_num * mad->write_offset)); + + if (copy_from_user(dsp_write_address, buff, count)) { + pr_err("%s: Cannot access memory\n", __func__); + return -EFAULT; + } + + mad->tx_buff[0] = VCS_MBOX_MSG_IF_ENC_DATA; + mad->tx_buff[1] = count; + mad->tx_buff[2] = mad->tx_buffer_num; + + if (mad->tx_buffer_num < (mad->max_tx_buffs-1)) + mad->tx_buffer_num++; + else + mad->tx_buffer_num = 0; + + msg.channel = CHANNEL_NUM_TX; + msg.data = mad->tx_buff; + msg.length = MAX_NR_OF_DATAWORDS; + msg.cb = mad_send_cb; + msg.priv = mad; + + retval = mbox_channel_send(&msg); + if (retval) { + pr_err("%s: cannot send data\n", __func__); + return retval; + } + return count; +} + +static unsigned int mad_select(struct file *filp, poll_table *wait) +{ + unsigned int mask = 0; + unsigned long flags; + + pr_debug("%s", __func__); + + poll_wait(filp, &mad->readq, wait); + spin_lock_irqsave(&mad->lock, flags); + + if ((true == mad->read_setup_msg) && (mad->data_written > 0)) + mask |= POLLIN | POLLRDNORM; /* allow readable */ + spin_unlock_irqrestore(&mad->lock, flags); + + return mask; +} + +static int mad_open(struct inode *ino, struct file *filp) +{ + int err = 0; + + pr_debug("%s", __func__); + + if (mad->open_check == true) { + pr_err("%s :MAD is already opened", __func__); + return -EFAULT; + } + + mad->rx_buff = kzalloc((MAX_NUM_RX_BUFF*2 * + sizeof(mad->rx_buff)), GFP_KERNEL); + + if (mad->rx_buff == NULL) { + pr_err("%s: Cannot allocate RX memory\n", __func__); + err = -ENOMEM; + goto error; + } + + mad->tx_buff = kzalloc(MAX_NR_OF_DATAWORDS, GFP_KERNEL); + if (mad->tx_buff == NULL) { + pr_err("%s: Cannot allocate TX memory\n", __func__); + err = -ENOMEM; + goto error; + } + + /* Init spinlock for critical section access*/ + spin_lock_init(&mad->lock); + init_waitqueue_head(&(mad->readq)); + + err = mbox_channel_register(CHANNEL_NUM_RX, mad_receive_cb, mad); + if (err) { + pr_err("%s: Cannot register channel\n", __func__); + err = -EFAULT; + goto error; + } + mad->open_check = true; + + return 0; +error: + kfree(mad->rx_buff); + kfree(mad->tx_buff); + return err; +} + +static int mad_close(struct inode *ino, struct file *filp) +{ + pr_debug("%s", __func__); + + if (mad->dsp_shm_write_ptr != NULL) { + iounmap(mad->dsp_shm_write_ptr); + mad->dsp_shm_write_ptr = NULL; + } + + if (mad->dsp_shm_read_ptr != NULL) { + iounmap(mad->dsp_shm_read_ptr); + mad->dsp_shm_read_ptr = NULL; + } + + kfree(mad->rx_buff); + kfree(mad->tx_buff); + + mad->open_check = false; + + return 0; +} + +static const struct file_operations mad_fops = { + .release = mad_close, + .open = mad_open, + .read = mad_read, + .write = mad_write, + .poll = mad_select, + .owner = THIS_MODULE, +}; + +static struct miscdevice mad_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = MAD_NAME, + .fops = &mad_fops +}; + +static int __init mad_init(void) +{ + pr_debug("%s", __func__); + + mad = kzalloc(sizeof(*mad), GFP_KERNEL); + if (mad == NULL) { + pr_err("%s :MAD Memory Allocation Failed", __func__); + return -ENOMEM; + } + + return misc_register(&mad_dev); +} +module_init(mad_init); + +static void __exit mad_exit(void) +{ + pr_debug("%s", __func__); + + kfree(mad); + + misc_deregister(&mad_dev); +} -- cgit v1.2.3 From ce23c93d4d753ae020418c248695d517350c12c1 Mon Sep 17 00:00:00 2001 From: Haridhar Kalvala Date: Tue, 6 Sep 2011 18:07:20 +0530 Subject: drivers: misc: pr* log prints replaced with dev* pr* debug log type used in the code is replaced with dev* log type. ST-Ericsson Linux next: Not tested, ER 350625 ST-Ericsson ID: 350625 ST-Ericsson FOSS-OUT ID: STETL-FOSS-OUT-10006 Change-Id: I2e8141ad0bd476ccfbaf86560cb1f754548cacc0 Author: Haridhar Kalvala Signed-off-by: Haridhar Kalvala Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/27447 Reviewed-by: QATOOLS Reviewed-by: QATEST Reviewed-by: Srinidhi KASAGAR Reviewed-by: Amaresh MULAGE Tested-by: Amaresh MULAGE --- drivers/misc/modem_audio/mad.c | 102 +++++++++++++++++++++++------------------ 1 file changed, 58 insertions(+), 44 deletions(-) diff --git a/drivers/misc/modem_audio/mad.c b/drivers/misc/modem_audio/mad.c index e9284b66dab..6332d84659a 100644 --- a/drivers/misc/modem_audio/mad.c +++ b/drivers/misc/modem_audio/mad.c @@ -115,6 +115,31 @@ struct mad_data { static struct mad_data *mad; +static void mad_receive_cb(u32 *data, u32 length, void *priv); +static int mad_read(struct file *filp, char __user *buff, size_t count, + loff_t *offp); +static int mad_write(struct file *filp, const char __user *buff, size_t count, + loff_t *offp); +static unsigned int mad_select(struct file *filp, poll_table *wait); +static void mad_send_cb(u32 *data, u32 len, void *arg); +static int mad_open(struct inode *ino, struct file *filp); +static int mad_close(struct inode *ino, struct file *filp); + +static const struct file_operations mad_fops = { + .release = mad_close, + .open = mad_open, + .read = mad_read, + .write = mad_write, + .poll = mad_select, + .owner = THIS_MODULE, +}; + +static struct miscdevice mad_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = MAD_NAME, + .fops = &mad_fops +}; + /** * mad_send_cb - This function is default callback for send. * @data -Pointer to the data buffer @@ -123,7 +148,7 @@ static struct mad_data *mad; */ static void mad_send_cb(u32 *data, u32 len, void *arg) { - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); } /** @@ -159,8 +184,7 @@ static void mad_receive_cb(u32 *data, u32 length, void *priv) mad->dsp_shm_write_ptr = ioremap(data[1], mad->max_tx_buffs * mad->write_offset); if (mad->dsp_shm_write_ptr == NULL) - pr_err("%s :Error write address ioremap failed %X\n", - __func__ ,(u32) mad->dsp_shm_write_ptr); + dev_err(mad_dev.this_device, "incrt write address"); /* Initialize all buffer numbers */ mad->tx_buffer_num = 0; @@ -173,7 +197,8 @@ static void mad_receive_cb(u32 *data, u32 length, void *priv) msg.priv = mad; if (mbox_channel_send(&msg)) - pr_err("%s: cannot send data\n", __func__); + dev_err(mad_dev.this_device, "%s: can't send data\n", + __func__); } /* setup message for reading SHM */ else if (*data == VCS_MBOX_MSG_READ_IF_SETUP) { @@ -208,7 +233,8 @@ static void mad_receive_cb(u32 *data, u32 length, void *priv) msg.priv = mad; if (mbox_channel_send(&msg)) - pr_err("%s: cannot send data\n", __func__); + dev_err(mad_dev.this_device, "%s: can't send data\n", + __func__); /* allow read */ spin_lock_irqsave(&mad->lock, flags); @@ -224,9 +250,11 @@ static void mad_receive_cb(u32 *data, u32 length, void *priv) */ if ((data[1] <= 0) || (mad->rx_buff == NULL)) { if (mad->rx_buff == NULL) - pr_notice("%s :MAD closed", __func__); + dev_warn(mad_dev.this_device, "%s :MAD closed", + __func__); else - pr_notice("%s : Zero size message", __func__); + dev_warn(mad_dev.this_device, "%s :0-len msg", + __func__); } else { mad->rx_buff[mad->rx_buffer_num] = data[1]; mad->rx_buffer_num++; @@ -243,8 +271,9 @@ static void mad_receive_cb(u32 *data, u32 length, void *priv) mad->data_written++; if (mad->data_written > MAX_NUM_RX_BUFF) { - pr_notice("%s : Read msg overflow = %u\n", - mad->data_written, __func__); + dev_warn(mad_dev.this_device, + "%s :Read msg overflow = %u\n", + __func__ , mad->data_written); /* * Donot exceed MAX_NUM_RX_BUFF size of buffer * TO DO overflow control @@ -256,7 +285,7 @@ static void mad_receive_cb(u32 *data, u32 length, void *priv) } } else { /* received Invalid message */ - pr_err("%s : Invalid Mesasge sent by the DSP\n ", __func__); + dev_err(mad_dev.this_device, "%s : Invalid Msg", __func__); } } @@ -267,7 +296,7 @@ static int mad_read(struct file *filp, char __user *buff, size_t count, unsigned int size = 0; void __iomem *shm_ptr = NULL; - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); if (!(mad->data_written > 0)) { if (wait_event_interruptible(mad->readq, @@ -277,7 +306,7 @@ static int mad_read(struct file *filp, char __user *buff, size_t count, } if (mad->dsp_shm_read_ptr == NULL) { - pr_err("%s :No Read shared memory pointer yet", __func__); + dev_err(mad_dev.this_device, "%s :pointer err", __func__); return -EINVAL ; } @@ -287,7 +316,7 @@ static int mad_read(struct file *filp, char __user *buff, size_t count, * It shouldnt come here : we ensured that message size * smaller that buffer length */ - pr_err("%s : Incorrect length", __func__); + dev_err(mad_dev.this_device, "%s : Incrct length", __func__); return -EFAULT; } size = mad->rx_buff[mad->rx_buffer_read]; @@ -296,7 +325,7 @@ static int mad_read(struct file *filp, char __user *buff, size_t count, shm_ptr = (u8 *)(mad->dsp_shm_read_ptr + (mad->rx_buff[mad->rx_buffer_read] * mad->read_offset)); if (copy_to_user(buff, shm_ptr, size) < 0) { - pr_err("%s :Error in copy to user", __func__); + dev_err(mad_dev.this_device, "%s :copy to user", __func__); return -EFAULT; } @@ -310,7 +339,7 @@ static int mad_read(struct file *filp, char __user *buff, size_t count, if (mad->data_written < 0) { /* Means wrong read*/ mad->data_written = 0; - pr_err("%s :Read More than Received", __func__); + dev_err(mad_dev.this_device, "%s :data Rcev err", __func__); } spin_unlock_irqrestore(&mad->lock, flags); return size; @@ -323,11 +352,11 @@ static int mad_write(struct file *filp, const char __user *buff, size_t count, void __iomem *dsp_write_address; struct mbox_channel_msg msg; - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); /* check for valid write pointer else skip writing*/ if (mad->dsp_shm_write_ptr == NULL) { - pr_err("%s : Illegal memory access\n", __func__); + dev_err(mad_dev.this_device, "%s :Illegal memory", __func__); return -EFAULT; } @@ -335,7 +364,7 @@ static int mad_write(struct file *filp, const char __user *buff, size_t count, (mad->tx_buffer_num * mad->write_offset)); if (copy_from_user(dsp_write_address, buff, count)) { - pr_err("%s: Cannot access memory\n", __func__); + dev_err(mad_dev.this_device, "%s:copy_from_user\n", __func__); return -EFAULT; } @@ -356,7 +385,7 @@ static int mad_write(struct file *filp, const char __user *buff, size_t count, retval = mbox_channel_send(&msg); if (retval) { - pr_err("%s: cannot send data\n", __func__); + dev_err(mad_dev.this_device, "%s:can't send data", __func__); return retval; } return count; @@ -367,7 +396,7 @@ static unsigned int mad_select(struct file *filp, poll_table *wait) unsigned int mask = 0; unsigned long flags; - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); poll_wait(filp, &mad->readq, wait); spin_lock_irqsave(&mad->lock, flags); @@ -383,10 +412,10 @@ static int mad_open(struct inode *ino, struct file *filp) { int err = 0; - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); if (mad->open_check == true) { - pr_err("%s :MAD is already opened", __func__); + dev_err(mad_dev.this_device, "%s :Already opened", __func__); return -EFAULT; } @@ -394,14 +423,14 @@ static int mad_open(struct inode *ino, struct file *filp) sizeof(mad->rx_buff)), GFP_KERNEL); if (mad->rx_buff == NULL) { - pr_err("%s: Cannot allocate RX memory\n", __func__); + dev_err(mad_dev.this_device, "%s:RX memory\n", __func__); err = -ENOMEM; goto error; } mad->tx_buff = kzalloc(MAX_NR_OF_DATAWORDS, GFP_KERNEL); if (mad->tx_buff == NULL) { - pr_err("%s: Cannot allocate TX memory\n", __func__); + dev_err(mad_dev.this_device, "%s:TX memory\n", __func__); err = -ENOMEM; goto error; } @@ -412,7 +441,7 @@ static int mad_open(struct inode *ino, struct file *filp) err = mbox_channel_register(CHANNEL_NUM_RX, mad_receive_cb, mad); if (err) { - pr_err("%s: Cannot register channel\n", __func__); + dev_err(mad_dev.this_device, "%s: register err", __func__); err = -EFAULT; goto error; } @@ -427,7 +456,7 @@ error: static int mad_close(struct inode *ino, struct file *filp) { - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); if (mad->dsp_shm_write_ptr != NULL) { iounmap(mad->dsp_shm_write_ptr); @@ -447,28 +476,13 @@ static int mad_close(struct inode *ino, struct file *filp) return 0; } -static const struct file_operations mad_fops = { - .release = mad_close, - .open = mad_open, - .read = mad_read, - .write = mad_write, - .poll = mad_select, - .owner = THIS_MODULE, -}; - -static struct miscdevice mad_dev = { - .minor = MISC_DYNAMIC_MINOR, - .name = MAD_NAME, - .fops = &mad_fops -}; - static int __init mad_init(void) { - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); mad = kzalloc(sizeof(*mad), GFP_KERNEL); if (mad == NULL) { - pr_err("%s :MAD Memory Allocation Failed", __func__); + dev_err(mad_dev.this_device, "%s :MAD failed", __func__); return -ENOMEM; } @@ -478,7 +492,7 @@ module_init(mad_init); static void __exit mad_exit(void) { - pr_debug("%s", __func__); + dev_dbg(mad_dev.this_device, "%s", __func__); kfree(mad); -- cgit v1.2.3 From 4fa8235a698317ba96497f0e280c6fcb9bd5a1fa Mon Sep 17 00:00:00 2001 From: ing07300 Date: Tue, 6 Sep 2011 18:09:13 +0530 Subject: drivers: misc: Shared Address checking on re-open. Shared memory address check on re-open of driver.And reset of data written count on close of driver. ST-Ericsson Linux next: Not tested, ER 350889 ST-Ericsson ID: 350889 ST-Ericsson FOSS-OUT ID: STETL-FOSS-OUT-10006 Change-Id: I1cc1c41e4bab2799c2110aa575506bce97d0e273 Author: Haridhar Kalvala Signed-off-by: ing07300 Signed-off-by: Haridhar Kalvala Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/27388 Reviewed-by: QATOOLS Reviewed-by: QATEST Tested-by: Ganesh V Reviewed-by: Ganesh V Reviewed-by: Srinidhi KASAGAR --- drivers/misc/modem_audio/mad.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/misc/modem_audio/mad.c b/drivers/misc/modem_audio/mad.c index 6332d84659a..62bef3c75fd 100644 --- a/drivers/misc/modem_audio/mad.c +++ b/drivers/misc/modem_audio/mad.c @@ -248,7 +248,8 @@ static void mad_receive_cb(u32 *data, u32 length, void *priv) * Check if you have valid message with proper length in message * otherwise Dont care */ - if ((data[1] <= 0) || (mad->rx_buff == NULL)) { + if ((data[1] <= 0) || (mad->rx_buff == NULL) + || (mad->dsp_shm_read_ptr == NULL)) { if (mad->rx_buff == NULL) dev_warn(mad_dev.this_device, "%s :MAD closed", __func__); @@ -470,7 +471,7 @@ static int mad_close(struct inode *ino, struct file *filp) kfree(mad->rx_buff); kfree(mad->tx_buff); - + mad->data_written = 0; mad->open_check = false; return 0; -- cgit v1.2.3 From 6267416fec14553846f60afed3d2b212ac2856ea Mon Sep 17 00:00:00 2001 From: Marcus Danielsson Date: Mon, 5 Sep 2011 14:35:29 +0200 Subject: ux500: changed the end variable in modem trace. Fixed an off by one error in modem tracer. ST-Ericsson ID: 356944 ST-Ericsson Linux next: N/A ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I82ee4d37a677e54e88c3de2a75e099be1c7a77e9 Signed-off-by: Marcus Danielsson Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30638 Reviewed-by: Daniel WILLERUD Reviewed-by: Jonas ABERG --- drivers/misc/db8500-modem-trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/db8500-modem-trace.c b/drivers/misc/db8500-modem-trace.c index 0d739fb4694..b757b742121 100644 --- a/drivers/misc/db8500-modem-trace.c +++ b/drivers/misc/db8500-modem-trace.c @@ -203,7 +203,7 @@ static int trace_probe(struct platform_device *pdev) trace_priv->misc_dev.name = DEVICE_NAME; trace_priv->misc_dev.fops = &trace_fops; trace_priv->area = (void __iomem *)ioremap_nocache(mem->start, - mem->end - mem->start); + resource_size(mem)); if (!trace_priv->area) { rv = -ENOMEM; goto outfree; -- cgit v1.2.3 From 73456e93ee8ca9605a3b4421d1f763d71c019815 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Thu, 15 Sep 2011 09:36:16 +0530 Subject: u5500 : modem irq update irq request flag should also be IRQF_NO_SUSPEND Signed-off-by: Bibek Basu Change-Id: I6db0770c7cfd62ee0feab03553a315781177def8 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/31000 Reviewed-by: Arun MURTHY --- arch/arm/mach-ux500/modem-irq-db5500.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-ux500/modem-irq-db5500.c b/arch/arm/mach-ux500/modem-irq-db5500.c index 52bca4eb8b6..7c2947af984 100644 --- a/arch/arm/mach-ux500/modem-irq-db5500.c +++ b/arch/arm/mach-ux500/modem-irq-db5500.c @@ -133,7 +133,7 @@ static int modem_irq_init(void) err = request_threaded_irq(IRQ_DB5500_MODEM, NULL, modem_cpu_irq_handler, - IRQF_ONESHOT | IRQF_ONESHOT, + IRQF_NO_SUSPEND | IRQF_ONESHOT, "modem_irq", mi); if (err) pr_err("modem_irq: Could not register IRQ %d\n", -- cgit v1.2.3 From 5abcac449c89b650b8f521ba9edb1c2a9e922c1f Mon Sep 17 00:00:00 2001 From: "Rajanikanth H.V" Date: Thu, 15 Sep 2011 15:36:50 +0530 Subject: mbox: fix mbox crash added the missing mutex lock Change-Id: Ieab65c85408b783f029e04155be32fdc2299fa7e Signed-off-by: Rajanikanth H.V --- drivers/misc/mbox_channels-db5500.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/misc/mbox_channels-db5500.c b/drivers/misc/mbox_channels-db5500.c index 6bd4afa5fe2..a0b72d4d97a 100644 --- a/drivers/misc/mbox_channels-db5500.c +++ b/drivers/misc/mbox_channels-db5500.c @@ -282,7 +282,6 @@ static int send_pdu(struct channel_status *chan_status, int command, struct mbox *mbox; u32 header = 0; int ret = 0; - /* SEND PDU is not supported */ if (command == MBOX_SEND) { dev_err(&channels.pdev->dev, "SEND command not implemented\n"); @@ -387,8 +386,10 @@ void mbox_handle_open_msg(struct work_struct *work) /* Change channel state to OPEN */ tx_chan->state = MBOX_OPEN; /* If pending list not empty, start sending data */ + mutex_lock(&tx_chan->lock); if (!list_empty(&tx_chan->tx.pending)) send_pdu(tx_chan, MBOX_CAST, tx_chan->channel); + mutex_unlock(&tx_chan->lock); } void mbox_handle_cast_msg(struct work_struct *work) @@ -528,8 +529,6 @@ static void mbox_cb(u32 mbox_msg, void *priv) struct channel_status *rx_chan = NULL; bool is_Payload = 0; - dev_dbg(&channels.pdev->dev, "%s type %d\t, mbox_msg %x\n", - __func__, type, mbox_msg); /* Get RX channels list for given mbox unit */ rx_list = get_rx_list(mbox_id); if (rx_list == NULL) { @@ -607,7 +606,6 @@ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) int res = 0; struct mbox_unit_status *mbox_unit; - dev_dbg(&channels.pdev->dev, " %s channel = %d\n", __func__, channel); /* Check for callback fcn */ if (cb == NULL) { dev_err(&channels.pdev->dev, @@ -983,7 +981,6 @@ static void mboxtest_receive_cb(u32 *data, u32 len, void *arg) printk(KERN_INFO "receive_cb.. data.= 0x%X, len = %d\n", *data, len); - for (i = 0; i < len; i++) *(mboxtest->rx_pointer++) = *(data++); -- cgit v1.2.3 From 5a34478d544daded0970033b8421f777c9a9d8b6 Mon Sep 17 00:00:00 2001 From: Hemant Ramdasi Date: Fri, 16 Sep 2011 18:16:51 +0530 Subject: Phonet: Insert correct dest addr and port for TCP/IP data on U8500 Inserts correct dest addr and port for the TCP/IP data on ST-Ericsson U8500. This is required due to lack of Pipe controller implementation in ST-Ericsson U8500 Modem Signed-off-by: Hemant Ramdasi Change-Id: I3c199cc94da3b81de3ab97f22b6e7087b2cd0071 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/31273 --- net/phonet/pep.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/net/phonet/pep.c b/net/phonet/pep.c index f17fd841f94..84759258d82 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -50,6 +50,15 @@ #define CREDITS_MAX 10 #define CREDITS_THR 7 +#ifdef CONFIG_ARCH_U8500 +static struct sockaddr_pn pipe_srv = { + .spn_family = AF_PHONET, + .spn_resource = 0xD9, /* pipe service */ + .spn_dev = 0x60, /*modem dev-id*/ + .spn_obj = 0x30, /*modem pep*/ +}; +#endif + #define pep_sb_size(s) (((s) + 5) & ~3) /* 2-bytes head, 32-bits aligned */ /* Get the next TLV sub-block. */ @@ -1028,8 +1037,12 @@ static int pipe_skb_send(struct sock *sk, struct sk_buff *skb) } else ph->message_id = PNS_PIPE_DATA; ph->pipe_handle = pn->pipe_handle; - err = pn_skb_send(sk, skb, NULL); +#ifdef CONFIG_ARCH_U8500 + err = pn_skb_send(sk, skb, &pipe_srv); +#else + err = pn_skb_send(sk, skb, NULL); +#endif if (err && pn_flow_safe(pn->tx_fc)) atomic_inc(&pn->tx_credits); return err; -- cgit v1.2.3 From d8037440b93b04ea40f99e74df36e505a3e7361c Mon Sep 17 00:00:00 2001 From: Arun Murthy Date: Thu, 8 Sep 2011 16:56:48 +0530 Subject: mbox: optimize tx path and fix bug in rx path During tx, in the work function check for if any messages are pending to be transmitted, if so, re-transmit. If in rx path work function is queued twice then the work is executed only once so the other message will be lost. Hence check if work has been queued and if so read the next message. ST-Ericsson Linux next: NA ST-Ericsson ID: 357703 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I7f3a18947e36cae30da8ca391d10ed5d3ac0eb03 Signed-off-by: Arun Murthy Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/31742 Reviewed-by: Bibek BASU Tested-by: Bibek BASU --- drivers/misc/mbox.c | 6 ++++++ drivers/misc/mbox_channels-db5500.c | 36 ++++++++++++++++++++++++++++++------ 2 files changed, 36 insertions(+), 6 deletions(-) diff --git a/drivers/misc/mbox.c b/drivers/misc/mbox.c index b2810718822..5f5a457b277 100644 --- a/drivers/misc/mbox.c +++ b/drivers/misc/mbox.c @@ -348,6 +348,7 @@ static irqreturn_t mbox_irq(int irq, void *arg) if (nbr_occup == 0) goto exit; +redo: if (mbox->cb == NULL) { dev_dbg(&(mbox->pdev->dev), "No receive callback registered, " "leaving %d incoming messages in fifo!\n", nbr_occup); @@ -363,6 +364,11 @@ static irqreturn_t mbox_irq(int irq, void *arg) mbox_value); mbox->cb(mbox_value, mbox->client_data); + nbr_occup = readl(mbox->virtbase_local + MBOX_FIFO_STATUS) & 0x7; + + if (nbr_occup > 0) + goto redo; + exit: dev_dbg(&(mbox->pdev->dev), "Exit mbox IRQ. ri = %d, wi = %d\n", mbox->read_index, mbox->write_index); diff --git a/drivers/misc/mbox_channels-db5500.c b/drivers/misc/mbox_channels-db5500.c index a0b72d4d97a..43a4d57caaf 100644 --- a/drivers/misc/mbox_channels-db5500.c +++ b/drivers/misc/mbox_channels-db5500.c @@ -121,7 +121,7 @@ struct rx_pending_elem { void *priv; }; -struct rx_pending_elem rx_pending[NUM_DSP_BUFFER + 1]; +struct rx_pending_elem rx_pending[NUM_DSP_BUFFER]; /* This structure holds list of pending elements for mbox tx channel */ struct tx_channel { @@ -154,6 +154,7 @@ struct rx_channel { * @lock: holds lock for channel */ struct channel_status { + atomic_t rcv_counter; struct list_head list; u16 channel; int state; @@ -362,6 +363,9 @@ void mbox_handle_receive_msg(struct work_struct *work) struct channel_status, receive_msg); + if (!atomic_read(&rx_chan->rcv_counter)) + return; +rcv_msg: /* Call client's callback and reset state */ if (rx_chan->cb) { static int rx_pending_count; @@ -375,6 +379,8 @@ void mbox_handle_receive_msg(struct work_struct *work) dev_err(&channels.pdev->dev, "%s no callback provided\n", __func__); } + if (atomic_dec_and_test(&rx_chan->rcv_counter) > 0) + goto rcv_msg; } @@ -413,12 +419,14 @@ static bool handle_receive_msg(u32 mbox_msg, struct channel_status *rx_chan) if (rx_chan) { /* Store received data in RX channel buffer */ rx_chan->rx.buffer[rx_chan->rx.index++] = mbox_msg; + /* Check if it's last data of PDU */ if (rx_chan->rx.index == rx_chan->rx.length) { for (i = 0; i < MAILBOX_NR_OF_DATAWORDS; i++) { rx_pending[rx_pending_count].buffer[i] = rx_chan->rx.buffer[i]; } + rx_pending[rx_pending_count].length = rx_chan->rx.length; rx_pending[rx_pending_count].priv = rx_chan->priv; @@ -429,10 +437,12 @@ static bool handle_receive_msg(u32 mbox_msg, struct channel_status *rx_chan) rx_pending_count++; if (rx_pending_count == NUM_DSP_BUFFER) rx_pending_count = 0; + atomic_inc(&rx_chan->rcv_counter); queue_work(rx_chan->receive_wq, &rx_chan->receive_msg); } dev_dbg(&channels.pdev->dev, "%s OK\n", __func__); + return true; } return false; @@ -529,6 +539,9 @@ static void mbox_cb(u32 mbox_msg, void *priv) struct channel_status *rx_chan = NULL; bool is_Payload = 0; + dev_dbg(&channels.pdev->dev, "%s type %d\t, mbox_msg %x\n", + __func__, type, mbox_msg); + /* Get RX channels list for given mbox unit */ rx_list = get_rx_list(mbox_id); if (rx_list == NULL) { @@ -606,6 +619,7 @@ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) int res = 0; struct mbox_unit_status *mbox_unit; + dev_dbg(&channels.pdev->dev, " %s channel = %d\n", __func__, channel); /* Check for callback fcn */ if (cb == NULL) { dev_err(&channels.pdev->dev, @@ -655,6 +669,7 @@ int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv) goto exit; } + atomic_set(&rx_chan->rcv_counter, 0); /* Fill out newly allocated element and add it to rx list */ rx_chan->channel = channel; rx_chan->cb = cb; @@ -780,22 +795,26 @@ int mbox_channel_send(struct mbox_channel_msg *msg) struct channel_status *tx_chan = NULL; struct pending_elem *pending; struct mbox_unit_status *mbox_unit; + int res = 0; if (msg->length > MAILBOX_NR_OF_DATAWORDS || msg->length == 0) { dev_err(&channels.pdev->dev, "data length incorrect\n"); - return -EINVAL; + res = -EINVAL; + goto exit; } if (!check_channel(msg->channel, MBOX_TX)) { dev_err(&channels.pdev->dev, "wrong channel number %d\n", msg->channel); - return -EINVAL; + res = -EINVAL; + goto exit; } tx_list = get_tx_list(get_mbox_id(msg->channel)); if (tx_list == NULL) { dev_err(&channels.pdev->dev, "given mbox id is not valid\n"); - return -EINVAL; + res = -EINVAL; + goto exit; } mbox_unit = container_of(tx_list, struct mbox_unit_status, tx_chans); @@ -814,7 +833,8 @@ int mbox_channel_send(struct mbox_channel_msg *msg) if (pending == NULL) { dev_err(&channels.pdev->dev, "couldn't allocate memory for pending\n"); - return -ENOMEM; + res = -ENOMEM; + goto exit; } pending->data = msg->data; pending->length = msg->length; @@ -836,7 +856,8 @@ int mbox_channel_send(struct mbox_channel_msg *msg) dev_err(&channels.pdev->dev, "couldn't allocate memory for \ tx_chan\n"); - return -ENOMEM; + res = -ENOMEM; + goto exit; } tx_chan->channel = msg->channel; tx_chan->cb = msg->cb; @@ -856,6 +877,9 @@ int mbox_channel_send(struct mbox_channel_msg *msg) mutex_unlock(&tx_chan->lock); } return 0; + +exit: + return res; } EXPORT_SYMBOL(mbox_channel_send); -- cgit v1.2.3 From 67d1e28837568310e6fc673e5f04e3ff00689257 Mon Sep 17 00:00:00 2001 From: Jonas Aaberg Date: Tue, 30 Aug 2011 11:52:02 +0200 Subject: modem: shrm: Remove a warning ST-Ericsson ID: - ST-Ericsson Linux next: Not tested ST-Ericsson FOSS-OUT ID: Trivial Change-Id: Ib02e686a4eff7e23da9a5454ffbc60a97a1d9d48 Signed-off-by: Jonas Aaberg Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/29720 Reviewed-by: QABUILD Reviewed-by: QATEST Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/31931 Reviewed-by: Arun MURTHY Tested-by: Arun MURTHY --- drivers/modem/shrm/shrm_fifo.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/modem/shrm/shrm_fifo.c b/drivers/modem/shrm/shrm_fifo.c index 9e6564aa6bc..1f0f9202e51 100644 --- a/drivers/modem/shrm/shrm_fifo.c +++ b/drivers/modem/shrm/shrm_fifo.c @@ -519,7 +519,7 @@ u8 read_one_l2msg_audio(struct shrm_dev *shrm, fifo->availablesize); dev_info(shrm->dev, "end_fifo= %x\n", fifo->end_addr_fifo); - dev_info(shrm->dev, "Received msgtype is &d\n", msgtype); + dev_info(shrm->dev, "Received msgtype is %d\n", msgtype); /* Fatal ERROR - should never happens */ dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); BUG(); -- cgit v1.2.3 From a060e96cc2065fffaf0703c685bf954f48be8472 Mon Sep 17 00:00:00 2001 From: Johan Ydstrom Date: Tue, 6 Sep 2011 10:30:25 +0200 Subject: misc: shrm: Move IRQ disable to IRQ handler As soon as receving CP reset interrupt, all IRQ should be disabled and CP boot state should be changed. ST-Ericsson ID: 359707 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I1326bd18ef7a2f7694d82b280eecdd053d1857b1 Signed-off-by: Johan Ydstrom Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30684 Reviewed-by: Daniel WILLERUD Reviewed-by: Arun MURTHY Reviewed-by: Jonas ABERG Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/31932 Tested-by: Arun MURTHY --- drivers/modem/shrm/shrm_protocol.c | 49 +++++++++++++++++--------------------- 1 file changed, 22 insertions(+), 27 deletions(-) diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index 990591faee1..883c46b4f8f 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -480,33 +480,6 @@ static int shrm_modem_reset_sequence(void) int err; unsigned long flags; - /* - * disable irqs - * very much needed for user-space initiated - * modem-reset - */ - disable_irq_nosync(shm_dev->ac_read_notif_0_irq); - disable_irq_nosync(shm_dev->ac_read_notif_1_irq); - disable_irq_nosync(shm_dev->ca_msg_pending_notif_0_irq); - disable_irq_nosync(shm_dev->ca_msg_pending_notif_1_irq); - disable_irq_nosync(IRQ_PRCMU_CA_WAKE); - disable_irq_nosync(IRQ_PRCMU_CA_SLEEP); - - - /* update the boot_state */ - spin_lock_irqsave(&boot_lock, flags); - boot_state = BOOT_UNKNOWN; - - /* - * put a barrier over here to make sure boot_state is updated - * else, it is seen that some of already executing modem - * irqs or tasklets fail the protocol checks and will ultimately - * try to acces the modem causing system to hang. - * This is particularly seen with user-space initiated modem reset - */ - wmb(); - spin_unlock_irqrestore(&boot_lock, flags); - hrtimer_cancel(&timer); /* @@ -582,6 +555,7 @@ DECLARE_TASKLET(shrm_sw_reset_callback, shrm_modem_reset_callback, static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) { struct shrm_dev *shrm = data; + unsigned long flags; switch (irq) { case IRQ_PRCMU_CA_WAKE: @@ -597,6 +571,27 @@ static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) queue_work(shrm->shm_ca_wake_wq, &shrm->shm_ca_sleep_req); break; case IRQ_PRCMU_MODEM_SW_RESET_REQ: + /* update the boot_state */ + spin_lock_irqsave(&boot_lock, flags); + boot_state = BOOT_UNKNOWN; + + /* + * put a barrier over here to make sure boot_state is updated + * else, it is seen that some of already executing modem + * irqs or tasklets fail the protocol checks and will ultimately + * try to acces the modem causing system to hang. + * This is particularly seen with user-space initiated modem reset + */ + wmb(); + spin_unlock_irqrestore(&boot_lock, flags); + + disable_irq_nosync(shrm->ac_read_notif_0_irq); + disable_irq_nosync(shrm->ac_read_notif_1_irq); + disable_irq_nosync(shrm->ca_msg_pending_notif_0_irq); + disable_irq_nosync(shrm->ca_msg_pending_notif_1_irq); + disable_irq_nosync(IRQ_PRCMU_CA_WAKE); + disable_irq_nosync(IRQ_PRCMU_CA_SLEEP); + tasklet_schedule(&shrm_sw_reset_callback); break; default: -- cgit v1.2.3 From f961de0fef709fdd14567fe74e8542254055e14a Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Mon, 17 Oct 2011 12:05:11 +0200 Subject: ARM: shrm: Remove powersave Since we don't know really the status of powersave related feature on this development track, let's remove everything, except: - prcmu driver: New location, which is the same as linux-next - cpufreq: new location, same as linux-next - regulator: keep as is for the moment, needed for the system to work. - clocks: same as for regulator. - pm-runtime: keep it as is. Later patches will re-add powersave, based upon what exists on SI u8500-android-2.3_v3.15 MTU from plat-nomadik is now used instead of own copy in mach. Signed-off-by: Jonas Aaberg Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32048 --- drivers/modem/shrm/shrm_protocol.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index 883c46b4f8f..3b7abf7da61 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -18,7 +18,6 @@ #include #include #include -#include #include #define L2_HEADER_ISI 0x0 @@ -449,9 +448,6 @@ void shm_ca_sleep_req_work(struct work_struct *work) hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), HRTIMER_MODE_REL); -#ifdef CONFIG_UX500_SUSPEND - suspend_unblock_sleep(); -#endif atomic_dec(&ac_sleep_disable_count); } @@ -559,9 +555,6 @@ static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) switch (irq) { case IRQ_PRCMU_CA_WAKE: -#ifdef CONFIG_UX500_SUSPEND - suspend_block_sleep(); -#endif if (shrm->msr_flag) atomic_set(&ac_sleep_disable_count, 0); atomic_inc(&ac_sleep_disable_count); -- cgit v1.2.3 From 149b2eaaf587a103e8b7bd6cfaa3829e6ff9e10e Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Mon, 17 Oct 2011 13:08:24 +0200 Subject: ARM: ux500: modem: Replace mach prcmu driver with mainlined version The prcmu driver now exists in drivers/mfd Signed-off-by: Jonas Aaberg Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32057 --- drivers/modem/modem_u8500.c | 2 +- drivers/modem/shrm/shrm_protocol.c | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/modem/modem_u8500.c b/drivers/modem/modem_u8500.c index 20b5fe78ef7..2f5288d07bf 100644 --- a/drivers/modem/modem_u8500.c +++ b/drivers/modem/modem_u8500.c @@ -11,7 +11,7 @@ #include #include #include -#include +#include static void u8500_modem_request(struct modem_dev *mdev) { diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index 3b7abf7da61..137b70e9cbf 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -16,8 +16,7 @@ #include #include #include -#include -#include +#include #include #define L2_HEADER_ISI 0x0 @@ -31,6 +30,8 @@ #define L2_HEADER_CIQ 0xC3 #define MAX_PAYLOAD 1024 +#define PRCM_HOSTACCESS_REQ (_PRCMU_BASE + 0x334) + static u8 boot_state = BOOT_INIT; static u8 recieve_common_msg[8*1024]; static u8 recieve_audio_msg[8*1024]; -- cgit v1.2.3 From b4bf723f8f75f7d4f8dc42960c080eee784469ea Mon Sep 17 00:00:00 2001 From: Jonas Aaberg Date: Tue, 20 Sep 2011 12:03:08 +0200 Subject: drivers: modem: shrm: Block suspend when needed Change-Id: Ic86e900e38d61e1c9aa9d4a54daf1d610f0f2484 Signed-off-by: Jonas Aaberg Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32079 --- drivers/modem/shrm/shrm_protocol.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index 137b70e9cbf..50443e4803a 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -18,6 +18,7 @@ #include #include #include +#include #define L2_HEADER_ISI 0x0 #define L2_HEADER_RPC 0x1 @@ -449,6 +450,7 @@ void shm_ca_sleep_req_work(struct work_struct *work) hrtimer_start(&timer, ktime_set(0, 10*NSEC_PER_MSEC), HRTIMER_MODE_REL); + suspend_unblock_sleep(); atomic_dec(&ac_sleep_disable_count); } @@ -556,6 +558,7 @@ static irqreturn_t shrm_prcmu_irq_handler(int irq, void *data) switch (irq) { case IRQ_PRCMU_CA_WAKE: + suspend_block_sleep(); if (shrm->msr_flag) atomic_set(&ac_sleep_disable_count, 0); atomic_inc(&ac_sleep_disable_count); -- cgit v1.2.3 From 3c386539e8dd21e8cadb90c79be89a09269ee341 Mon Sep 17 00:00:00 2001 From: Arun Murthy Date: Thu, 29 Sep 2011 13:11:25 +0530 Subject: u5500-mbox: Add platform driver remove Also correct the improper usage of platform data. ST-Ericsson Linux next: NA ST-Ericsson ID: 341807 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I9468996195c3652e94fc908f90ce85c66a5db519 Signed-off-by: Arun Murthy Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32490 Reviewed-by: Srinidhi KASAGAR --- drivers/misc/mbox.c | 37 ++++++++++++++++++++++--------------- 1 file changed, 22 insertions(+), 15 deletions(-) diff --git a/drivers/misc/mbox.c b/drivers/misc/mbox.c index 5f5a457b277..73f34069d84 100644 --- a/drivers/misc/mbox.c +++ b/drivers/misc/mbox.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include @@ -130,7 +131,8 @@ static ssize_t mbox_write_fifo(struct device *dev, char *token; char *val; - struct mbox *mbox = (struct mbox *) dev->platform_data; + struct platform_device *pdev = to_platform_device(dev); + struct mbox *mbox = platform_get_drvdata(pdev); strncpy((char *) &int_buf, buf, sizeof(int_buf)); token = (char *) &int_buf; @@ -158,7 +160,8 @@ static ssize_t mbox_read_fifo(struct device *dev, char *buf) { int mbox_value; - struct mbox *mbox = (struct mbox *) dev->platform_data; + struct platform_device *pdev = to_platform_device(dev); + struct mbox *mbox = platform_get_drvdata(pdev); if ((readl(mbox->virtbase_local + MBOX_FIFO_STATUS) & 0x7) <= 0) return sprintf(buf, "Mailbox is empty\n"); @@ -515,24 +518,18 @@ EXPORT_SYMBOL(mbox_setup); int __init mbox_probe(struct platform_device *pdev) { - struct mbox local_mbox; struct mbox *mbox; int res = 0; dev_dbg(&(pdev->dev), "Probing mailbox (pdev = 0x%X)...\n", (u32) pdev); - memset(&local_mbox, 0x0, sizeof(struct mbox)); - - /* Associate our mbox data with the platform device */ - res = platform_device_add_data(pdev, - (void *) &local_mbox, - sizeof(struct mbox)); - if (res != 0) { - dev_err(&(pdev->dev), - "Unable to allocate driver platform data!\n"); - goto exit; + mbox = kzalloc(sizeof(struct mbox), GFP_KERNEL); + if (mbox == NULL) { + dev_err(&pdev->dev, + "Could not allocate memory for struct mbox\n"); + return -ENOMEM; } - mbox = (struct mbox *) pdev->dev.platform_data; + mbox->pdev = pdev; mbox->write_index = 0; mbox->read_index = 0; @@ -543,13 +540,23 @@ int __init mbox_probe(struct platform_device *pdev) sprintf(mbox->name, "%s", MBOX_NAME); spin_lock_init(&mbox->lock); + platform_set_drvdata(pdev, mbox); dev_info(&(pdev->dev), "Mailbox driver loaded\n"); -exit: return res; } +static int __exit mbox_remove(struct platform_device *pdev) +{ + struct mbox *mbox = platform_get_drvdata(pdev); + + list_del(&mbox->list); + kfree(mbox); + return 0; +} + static struct platform_driver mbox_driver = { + .remove = __exit_p(mbox_remove), .driver = { .name = MBOX_NAME, .owner = THIS_MODULE, -- cgit v1.2.3 From 914b4f8e67ae6b26a99624d950e422108b9fb946 Mon Sep 17 00:00:00 2001 From: Arun Murthy Date: Fri, 30 Sep 2011 14:21:55 +0530 Subject: ux500-mbox: Proper shutdown of mailbox Implement clean shutdown of mailbox, which includes, unmapping the io mapped memory, free the requested interrupt, reset all state machine and remove from list. A function has been added to reset the mailbox which will be used in case of MSR. ST-Ericsson Linux next: NA ST-Ericsson ID: 341807 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I1435345d155717a5276a7a5d74da84d3eeef7f61 Signed-off-by: Arun Murthy Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32680 Reviewed-by: Srinidhi KASAGAR --- arch/arm/mach-ux500/include/mach/mbox-db5500.h | 5 ++ drivers/misc/mbox.c | 79 +++++++++++++++++++++++--- 2 files changed, 77 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-ux500/include/mach/mbox-db5500.h b/arch/arm/mach-ux500/include/mach/mbox-db5500.h index 7f9da4d2fbd..24af854befe 100644 --- a/arch/arm/mach-ux500/include/mach/mbox-db5500.h +++ b/arch/arm/mach-ux500/include/mach/mbox-db5500.h @@ -40,6 +40,7 @@ typedef void mbox_recv_cb_t (u32 mbox_msg, void *priv); * @lock: Spinlock to protect this mailbox instance. * @write_index: Index in internal buffer to write to. * @read_index: Index in internal buffer to read from. + * @irq: mailbox interrupt. * @allocated: Indicates whether this particular mailbox * id has been allocated by someone. */ @@ -57,7 +58,11 @@ struct mbox { spinlock_t lock; u8 write_index; u8 read_index; + int irq; bool allocated; +#if defined(CONFIG_DEBUG_FS) + struct dentry *dentry; +#endif }; /** diff --git a/drivers/misc/mbox.c b/drivers/misc/mbox.c index 73f34069d84..9bd5db9b23c 100644 --- a/drivers/misc/mbox.c +++ b/drivers/misc/mbox.c @@ -380,11 +380,35 @@ exit: return IRQ_HANDLED; } +static void mbox_shutdown(struct mbox *mbox) +{ +#if defined(CONFIG_DEBUG_FS) + debugfs_remove(mbox->dentry); + device_remove_file(&mbox->pdev->dev, &dev_attr_fifo); +#endif + writel(MBOX_DISABLE_IRQ, mbox->virtbase_local + MBOX_FIFO_THRES_OCCUP); + writel(MBOX_DISABLE_IRQ, mbox->virtbase_peer + MBOX_FIFO_THRES_FREE); + free_irq(mbox->irq, NULL); + mbox->client_blocked = 0; + iounmap(mbox->virtbase_local); + iounmap(mbox->virtbase_peer); + mbox->cb = NULL; + mbox->client_data = NULL; + mbox->allocated = false; +} + +void mbox_reset_state(struct mbox *mbox) +{ + list_for_each_entry(mbox, &mboxs, list) { + mbox_shutdown(mbox); + } +} + + /* Setup is executed once for each mbox pair */ struct mbox *mbox_setup(u8 mbox_id, mbox_recv_cb_t *mbox_cb, void *priv) { struct resource *resource; - int irq; int res; struct mbox *mbox; @@ -463,21 +487,21 @@ struct mbox *mbox_setup(u8 mbox_id, mbox_recv_cb_t *mbox_cb, void *priv) mbox->client_blocked = 0; /* Get IRQ for mailbox and allocate it */ - irq = platform_get_irq_byname(mbox->pdev, "mbox_irq"); - if (irq < 0) { + mbox->irq = platform_get_irq_byname(mbox->pdev, "mbox_irq"); + if (mbox->irq < 0) { dev_err(&(mbox->pdev->dev), "Unable to retrieve mbox irq resource\n"); mbox = NULL; goto exit; } - dev_dbg(&(mbox->pdev->dev), "Allocating irq %d...\n", irq); - res = request_threaded_irq(irq, NULL, mbox_irq, + dev_dbg(&(mbox->pdev->dev), "Allocating irq %d...\n", mbox->irq); + res = request_threaded_irq(mbox->irq, NULL, mbox_irq, IRQF_NO_SUSPEND | IRQF_ONESHOT, mbox->name, (void *) mbox); if (res < 0) { dev_err(&(mbox->pdev->dev), - "Unable to allocate mbox irq %d\n", irq); + "Unable to allocate mbox irq %d\n", mbox->irq); mbox = NULL; goto exit; } @@ -503,7 +527,7 @@ struct mbox *mbox_setup(u8 mbox_id, mbox_recv_cb_t *mbox_cb, void *priv) dev_warn(&(mbox->pdev->dev), "Unable to create mbox sysfs entry"); - (void) debugfs_create_file("mbox", S_IFREG | S_IRUGO, NULL, + mbox->dentry = debugfs_create_file("mbox", S_IFREG | S_IRUGO, NULL, NULL, &mbox_operations); #endif @@ -550,16 +574,57 @@ static int __exit mbox_remove(struct platform_device *pdev) { struct mbox *mbox = platform_get_drvdata(pdev); + mbox_shutdown(mbox); list_del(&mbox->list); kfree(mbox); return 0; } +#ifdef CONFIG_PM +int mbox_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mbox *mbox = platform_get_drvdata(pdev); + + /* + * Nothing to be done for now, once APE-Modem power management is + * in place communication will have to be stopped. + */ + + list_for_each_entry(mbox, &mboxs, list) { + if (mbox->client_blocked) + return -EBUSY; + } + return 0; +} + +int mbox_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mbox *mbox = platform_get_drvdata(pdev); + + /* + * Nothing to be done for now, once APE-Modem power management is + * in place communication will have to be resumed. + */ + + return 0; +} + +static const struct dev_pm_ops mbox_dev_pm_ops = { + .suspend_noirq = mbox_suspend, + .resume_noirq = mbox_resume, +}; +#endif + static struct platform_driver mbox_driver = { .remove = __exit_p(mbox_remove), .driver = { .name = MBOX_NAME, .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &mbox_dev_pm_ops, +#endif }, }; -- cgit v1.2.3 From 0083f7bd84a1fa506d5c84c9c55224c498bea351 Mon Sep 17 00:00:00 2001 From: Bengt Jonsson Date: Tue, 4 Oct 2011 11:40:10 +0200 Subject: regulators: ab8500: Add support of low voltage battery Low voltage batteries have a wider voltage range with lower operating voltages. Some consumers in the platform may not work with the lower voltages and therefore need an extra regulator to boost the voltage in this case. This driver adds support for checking the consumers that need higher voltage (Vaux1, 2 and 3 regulators, 3 V SIM) and control the external buck/boost regulator accordingly. Note that to utilize the low voltage battery support, the battery voltage thresholds must be changed. This applies for the low battery voltage threshold of the battery manager and the OTP setting for the AB8500 BattOk levels. ST-Ericsson ID: 282517, 363432 ST-Ericsson Linux next: - ST-Ericsson FOSS-OUT ID: Trivial Change-Id: Ife07a622ec9748c027dbbd78b01e4ee7e92629ec Signed-off-by: Bengt Jonsson Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/33616 Reviewed-by: QABUILD --- drivers/misc/sim_detect.c | 144 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 142 insertions(+), 2 deletions(-) diff --git a/drivers/misc/sim_detect.c b/drivers/misc/sim_detect.c index c267fe95ee3..213645ca46d 100644 --- a/drivers/misc/sim_detect.c +++ b/drivers/misc/sim_detect.c @@ -2,29 +2,130 @@ * Copyright (C) ST-Ericsson SA 2011 * * Author: BIBEK BASU + * * License terms: GNU General Public License (GPL) version 2 */ + #include #include #include #include #include +#include #include #include #include #include #include #include +#include #include #include +#include /* time in millisec */ #define TIMER_DELAY 10 + struct sim_detect{ struct work_struct timer_expired; struct device *dev; struct modem *modem; struct hrtimer timer; + struct mutex lock; + int voltage; + struct regulator *vinvsim_regulator; + bool regulator_enabled; +}; + +static ssize_t show_voltage(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct sim_detect *data = dev_get_drvdata(dev); + int ret, len; + + ret = mutex_lock_interruptible(&data->lock); + if (ret < 0) + return ret; + + len = sprintf(buf, "%i\n", data->voltage); + + mutex_unlock(&data->lock); + + return len; +} + +static ssize_t write_voltage(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sim_detect *sim_detect = dev_get_drvdata(dev); + long val; + int ret; + + /* check input */ + if (strict_strtol(buf, 0, &val) != 0) { + dev_err(dev, "Invalid voltage class configured.\n"); + return count; + } + + switch (val) { + case -1: + case 0: + case 1800000: + case 3000000: + break; + default: + dev_err(dev, "Invalid voltage class configured.\n"); + return count; + } + + /* lock */ + ret = mutex_lock_interruptible(&sim_detect->lock); + if (ret < 0) + return ret; + + /* update state */ + sim_detect->voltage = val; + + /* call regulator */ + switch (sim_detect->voltage) { + case 0: + /* SIM voltage is unknown, turn on regulator for 3 V SIM */ + case 3000000: + /* Vinvsim supply is used only for 3 V SIM */ + if (!sim_detect->regulator_enabled) { + ret = regulator_enable(sim_detect->vinvsim_regulator); + if (ret) { + dev_err(dev, "Failed to enable regulator.\n"); + goto out_unlock; + } + sim_detect->regulator_enabled = true; + } + break; + case 1800000: + case -1: + /* Vbatvsim is used otherwise */ + if (sim_detect->regulator_enabled) { + regulator_disable(sim_detect->vinvsim_regulator); + sim_detect->regulator_enabled = false; + } + } + +out_unlock: + /* unlock and return */ + mutex_unlock(&sim_detect->lock); + + return count; +} + +static DEVICE_ATTR(voltage, 0666, show_voltage, write_voltage); + +static struct attribute *sim_attributes[] = { + &dev_attr_voltage.attr, + NULL +}; + +static const struct attribute_group sim_attr_group = { + .attrs = sim_attributes, }; static void inform_modem_release(struct work_struct *work) @@ -87,6 +188,7 @@ static const struct dev_pm_ops sim_detect_dev_pm_ops = { }; #endif + static int __devinit sim_detect_probe(struct platform_device *pdev) { struct sim_detect_platform_data *plat = dev_get_platdata(&pdev->dev); @@ -98,25 +200,61 @@ static int __devinit sim_detect_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to allocate memory\n"); return -ENOMEM; } + + /* initialize data */ + mutex_init(&sim_detect->lock); + sim_detect->voltage = 0; + sim_detect->dev = &pdev->dev; INIT_WORK(&sim_detect->timer_expired, inform_modem_release); hrtimer_init(&sim_detect->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); sim_detect->timer.function = timer_callback; + sim_detect->modem = modem_get(sim_detect->dev, "u8500-shrm-modem"); if (IS_ERR(sim_detect->modem)) { ret = PTR_ERR(sim_detect->modem); dev_err(sim_detect->dev, "Could not retrieve the modem\n"); goto out_free; } + + /* set drvdata */ platform_set_drvdata(pdev, sim_detect); + + /* request irq */ ret = request_threaded_irq(plat->irq_num, NULL, sim_activity_irq, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, "sim activity", sim_detect); if (ret < 0) + goto out_put_modem; + + /* get regulator */ + sim_detect->regulator_enabled = false; + sim_detect->vinvsim_regulator = regulator_get(sim_detect->dev, + "vinvsim"); + if (IS_ERR(sim_detect->vinvsim_regulator)) { + dev_err(&pdev->dev, + "Failed to get regulator. (dev_name %s).\n", + dev_name(sim_detect->dev)); + ret = PTR_ERR(sim_detect->vinvsim_regulator); goto out_free_irq; + } + + /* register sysfs entry */ + ret = sysfs_create_group(&pdev->dev.kobj, &sim_attr_group); + if (ret != 0) { + dev_err(&pdev->dev, + "Failed to create attribute group: %d\n", ret); + goto out_free_regulator; + } + return 0; + +out_free_regulator: + regulator_put(sim_detect->vinvsim_regulator); out_free_irq: + free_irq(plat->irq_num, sim_detect); +out_put_modem: modem_put(sim_detect->modem); platform_set_drvdata(pdev, NULL); out_free: @@ -128,6 +266,8 @@ static int __devexit sim_detect_remove(struct platform_device *pdev) { struct sim_detect *sim_detect = platform_get_drvdata(pdev); + sysfs_remove_group(&pdev->dev.kobj, &sim_attr_group); + regulator_put(sim_detect->vinvsim_regulator); modem_put(sim_detect->modem); platform_set_drvdata(pdev, NULL); kfree(sim_detect); @@ -136,7 +276,7 @@ static int __devexit sim_detect_remove(struct platform_device *pdev) static struct platform_driver sim_detect_driver = { .driver = { - .name = "sim_detect", + .name = "sim-detect", .owner = THIS_MODULE, #ifdef CONFIG_PM .pm = &sim_detect_dev_pm_ops, @@ -160,5 +300,5 @@ module_exit(sim_detect_exit); MODULE_AUTHOR("BIBEK BASU "); MODULE_DESCRIPTION("Detects SIM Hot Swap and wakes modem"); -MODULE_ALIAS("SIM DETECT INTERRUPT driver"); +MODULE_ALIAS("platform:sim-detect"); MODULE_LICENSE("GPL v2"); -- cgit v1.2.3 From 2b245c0d4c279a331668ffffe5d4128e3f79b805 Mon Sep 17 00:00:00 2001 From: Bibek Basu Date: Fri, 23 Sep 2011 16:14:40 +0530 Subject: u5500 : check for modem_itp in mloader collect the modem type info from bootargs and expose over sysfs ST-Ericsson ID: 337490 ST-Ericsson FOSS-OUT ID: Trivial ST-Ericsson Linux next: NA Change-Id: Ia705e168568a0be08409af792a04091d4e96a50a Signed-off-by: Bibek Basu Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32480 Reviewed-by: Rabin VINCENT --- arch/arm/mach-ux500/mloader-db5500.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-ux500/mloader-db5500.c b/arch/arm/mach-ux500/mloader-db5500.c index 7798a1646d4..bc3a57af28b 100644 --- a/arch/arm/mach-ux500/mloader-db5500.c +++ b/arch/arm/mach-ux500/mloader-db5500.c @@ -20,13 +20,17 @@ static ssize_t db5500_mloader_sysfs_finalize(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); +static ssize_t db5500_mloader_sysfs_itpmode(struct device *dev, + struct device_attribute *attr, + char *buf); static DEVICE_ATTR(addr, S_IRUSR|S_IRGRP, db5500_mloader_sysfs_addr, NULL); static DEVICE_ATTR(finalize, S_IWUSR, NULL, db5500_mloader_sysfs_finalize); +static DEVICE_ATTR(is_itpmode, S_IRUSR|S_IRGRP, db5500_mloader_sysfs_itpmode, NULL); static unsigned int db5500_bootargs_memmap_modem_start; static unsigned int db5500_bootargs_memmap_modem_total_size; - +static unsigned int db5500_mloader_itpmode; static unsigned int db5500_mloader_shm_total_size; module_param_named(shm_total_size, db5500_mloader_shm_total_size, uint, 0600); MODULE_PARM_DESC(shm_total_size, "Total Size of SHM shared memory"); @@ -51,10 +55,23 @@ static int __init db5500_bootargs_shm_total_size(char *str) } early_param("mloader.shm_total_size", db5500_bootargs_shm_total_size); +static int __init db5500_bootargs_itpmode(char *p) +{ + int ret; + int count = 3; + if (!memcmp(p, "itp", count)) + db5500_mloader_itpmode = true; + else + db5500_mloader_itpmode = false; + return 1; +} +early_param("modem_boot_type", db5500_bootargs_itpmode); + static int __exit db5500_mloader_remove(struct platform_device *pdev) { sysfs_remove_file(&pdev->dev.kobj, &dev_attr_addr.attr); sysfs_remove_file(&pdev->dev.kobj, &dev_attr_finalize.attr); + sysfs_remove_file(&pdev->dev.kobj, &dev_attr_is_itpmode.attr); return 0; } @@ -96,6 +113,14 @@ static ssize_t db5500_mloader_sysfs_addr(struct device *dev, db5500_mloader_shm_total_size); } +static ssize_t db5500_mloader_sysfs_itpmode(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "0x%x\n", + db5500_mloader_itpmode); +} + static ssize_t db5500_mloader_sysfs_finalize(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -138,7 +163,12 @@ static int __init db5500_mloader_probe(struct platform_device *pdev) sysfs_remove_file(&pdev->dev.kobj, &dev_attr_addr.attr); return ret; } - + ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_is_itpmode.attr); + if (ret) { + sysfs_remove_file(&pdev->dev.kobj, &dev_attr_finalize.attr); + sysfs_remove_file(&pdev->dev.kobj, &dev_attr_addr.attr); + return ret; + } return 0; } -- cgit v1.2.3 From ef3222d8c94738f76f9f3de9edf8092381d63990 Mon Sep 17 00:00:00 2001 From: Arun Murthy Date: Mon, 10 Oct 2011 14:55:06 +0530 Subject: u8500-shrm: Initiate MSR in case of serious bug During APE-Modem communication, for some reasson if software or hardware fails, instead of calling kernel function BUG() and halting the system making it no more useful until reboot, initiate a MSR. ST-Ericsson Linux next: NA ST-Ericsson ID: 366150 ST-Ericsson FOSS-OUT ID: Trivial Change-Id: I59e93b338c3242b506be7775487be065421022b8 Signed-off-by: Arun Murthy Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/33416 Reviewed-by: Bibek BASU Reviewed-by: QABUILD Reviewed-by: Magnus TEMPLING Reviewed-by: Rickard EVERTSSON Reviewed-by: Srinidhi KASAGAR --- drivers/modem/shrm/shrm_fifo.c | 14 +++++++++++--- drivers/modem/shrm/shrm_protocol.c | 29 ++++++++++++++++++++++------- include/linux/modem/shrm/shrm_driver.h | 2 ++ 3 files changed, 35 insertions(+), 10 deletions(-) diff --git a/drivers/modem/shrm/shrm_fifo.c b/drivers/modem/shrm/shrm_fifo.c index 1f0f9202e51..57da56f4905 100644 --- a/drivers/modem/shrm/shrm_fifo.c +++ b/drivers/modem/shrm/shrm_fifo.c @@ -11,6 +11,7 @@ #include #include #include +#include #define L1_BOOT_INFO_REQ 1 #define L1_BOOT_INFO_RESP 2 @@ -109,7 +110,10 @@ u8 read_boot_info_req(struct shrm_dev *shrm, if (msgtype != L1_BOOT_INFO_REQ) { dev_err(shrm->dev, "Read_Boot_Info_Req Fatal ERROR\n"); dev_err(shrm->dev, "Received msgtype is %d\n", msgtype); - BUG(); + dev_info(shrm->dev, "Initiating a modem reset\n"); + queue_work(shrm->shm_ac_wake_wq, + &shrm->shm_mod_reset_req); + return 0; } *config = (header >> CONFIG_OFFSET) & MASK_0_15_BIT; *version = header & MASK_0_15_BIT; @@ -416,7 +420,9 @@ u8 read_one_l2msg_common(struct shrm_dev *shrm, fifo->end_addr_fifo); /* Fatal ERROR - should never happens */ dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); - BUG(); + dev_info(shrm->dev, "Initiating a modem reset\n"); + queue_work(shrm->shm_ac_wake_wq, + &shrm->shm_mod_reset_req); } if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { l2_header = (*((u32 *)fifo->fifo_virtual_addr)); @@ -522,7 +528,9 @@ u8 read_one_l2msg_audio(struct shrm_dev *shrm, dev_info(shrm->dev, "Received msgtype is %d\n", msgtype); /* Fatal ERROR - should never happens */ dev_crit(shrm->dev, "Fatal ERROR - should never happen\n"); - BUG(); + dev_info(shrm->dev, "Initiating a modem reset\n"); + queue_work(shrm->shm_ac_wake_wq, + &shrm->shm_mod_reset_req); } if (fifo->reader_local_rptr == (fifo->end_addr_fifo-1)) { l2_header = (*((u32 *)fifo->fifo_virtual_addr)); diff --git a/drivers/modem/shrm/shrm_protocol.c b/drivers/modem/shrm/shrm_protocol.c index 50443e4803a..e34a88676be 100644 --- a/drivers/modem/shrm/shrm_protocol.c +++ b/drivers/modem/shrm/shrm_protocol.c @@ -70,6 +70,11 @@ enum shrm_nl { SHRM_NL_STATUS_MOD_OFFLINE, }; +void shm_mod_reset_req_work(struct work_struct *work) +{ + prcmu_modem_reset(); +} + static void shm_ac_sleep_req_work(struct work_struct *work) { mutex_lock(&ac_state_mutex); @@ -264,7 +269,7 @@ void shm_ca_msgpending_0_tasklet(unsigned long tasklet_data) if (!read_boot_info_req(shrm, &config, &version)) { dev_err(shrm->dev, "Unable to read boot state\n"); - BUG(); + return; } /* SendReadNotification */ ca_msg_read_notification_0(shrm); @@ -468,8 +473,11 @@ void shm_ca_wake_req_work(struct work_struct *work) mutex_unlock(&ac_state_mutex); /* send ca_wake_ack_interrupt to CMU */ - if (!get_host_accessport_val()) - BUG(); + if (!get_host_accessport_val()) { + dev_crit(shrm->dev, "get_host_accessport failed\n"); + dev_info(shrm->dev, "Initiating a modem reset\n"); + prcmu_modem_reset(); + } writel((1<intr_base + GOP_SET_REGISTER_BASE); } @@ -611,8 +619,11 @@ static void send_ac_msg_pend_notify_0_work(struct work_struct *work) modem_request(shrm->modem); mutex_unlock(&ac_state_mutex); - if (!get_host_accessport_val()) - BUG(); + if (!get_host_accessport_val()) { + dev_crit(shrm->dev, "get_host_accessport failed\n"); + dev_info(shrm->dev, "Initiating a modem reset\n"); + prcmu_modem_reset(); + } /* Trigger AcMsgPendingNotification to CMU */ writel((1<modem); mutex_unlock(&ac_state_mutex); - if (!get_host_accessport_val()) - BUG(); + if (!get_host_accessport_val()) { + dev_crit(shrm->dev, "get_host_accessport failed\n"); + dev_info(shrm->dev, "Initiating a modem reset\n"); + prcmu_modem_reset(); + } /* Trigger AcMsgPendingNotification to CMU */ writel((1<shm_ca_sleep_req, shm_ca_sleep_req_work); INIT_WORK(&shrm->shm_ac_sleep_req, shm_ac_sleep_req_work); INIT_WORK(&shrm->shm_ac_wake_req, shm_ac_wake_req_work); + INIT_WORK(&shrm->shm_mod_reset_req, shm_mod_reset_req_work); /* set tasklet data */ shm_ca_0_tasklet.data = (unsigned long)shrm; diff --git a/include/linux/modem/shrm/shrm_driver.h b/include/linux/modem/shrm/shrm_driver.h index e7b87005565..8fa215571eb 100644 --- a/include/linux/modem/shrm/shrm_driver.h +++ b/include/linux/modem/shrm/shrm_driver.h @@ -77,6 +77,7 @@ * @shm_ca_wake_req: work to send cmt-ape wake request * @shm_ca_sleep_req: work to send cmt-ape sleep request * @shm_ac_sleep_req: work to send ape-cmt sleep request + * @shm_mod_reset_req: work to send a reset request to modem */ struct shrm_dev { u8 ca_wake_irq; @@ -127,6 +128,7 @@ struct shrm_dev { struct work_struct shm_ca_wake_req; struct work_struct shm_ca_sleep_req; struct work_struct shm_ac_sleep_req; + struct work_struct shm_mod_reset_req; }; /** -- cgit v1.2.3 From 6dbd85ea1611629720c71df2923058ac29f800dc Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Thu, 17 Nov 2011 15:45:34 +0100 Subject: staging: Add AB5500 SIM interface Driver Compilation Signed-off-by: Philippe Langlais --- drivers/staging/Kconfig | 10 ++++++++++ drivers/staging/Makefile | 1 + 2 files changed, 11 insertions(+) diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index 06c9081d596..4bfcbbaf297 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -24,6 +24,16 @@ menuconfig STAGING if STAGING +config AB5500_SIM + bool "ST-Ericsson AB5500 SIM Interface driver" + depends on AB5500_CORE + help + SIM Interface driver provides interface to configure + various parameters of AB5550 SIM Level Shifter.Support provided are: + Configure Pull up on sim lines + Configure Operation Mode + Notify Sim Insert/Extract Interrupt + source "drivers/staging/et131x/Kconfig" source "drivers/staging/slicoss/Kconfig" diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index f3c5e33bb26..7f5fca169be 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -66,3 +66,4 @@ obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4) += ste_rmi4/ obj-$(CONFIG_DRM_PSB) += gma500/ obj-$(CONFIG_INTEL_MEI) += mei/ obj-$(CONFIG_MFD_NVEC) += nvec/ +obj-$(CONFIG_AB5500_SIM) += ab5500_sim/ -- cgit v1.2.3 From 8286cacd7559ede40a48de8b869259941afbd920 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Fri, 18 Nov 2011 09:45:25 +0100 Subject: mach-ux500: For topic branches isolation, define Modem Loaders config flags here Signed-off-by: Philippe Langlais --- arch/arm/mach-ux500/Kconfig | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig index a3e0c8692f0..bb03fb14ff2 100644 --- a/arch/arm/mach-ux500/Kconfig +++ b/arch/arm/mach-ux500/Kconfig @@ -71,4 +71,18 @@ config U5500_MBOX help Add support for U5500 mailbox communication with modem side +config DB8500_MLOADER + bool "Modem firmware upload/download support" + depends on UX500_SOC_DB8500 + select DBX500_MLOADER + help + Adds Modem firmware upload/download support to DB8500. + +config U5500_MLOADER + bool "mLoader, mem config from kernel boot args exported to sysfs" + depends on UX500_SOC_DB5500 + help + Link between boot args and user space program that loads the modem ELF. + This is used to expose the modem parameters using sysfs interface. + endif -- cgit v1.2.3 From 64421ad0fb5ea5cc24e531d3c9ba00684354d95e Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Fri, 18 Nov 2011 12:12:41 +0100 Subject: misc: Compile modem sound specific misc drivers Signed-off-by: Philippe Langlais --- drivers/misc/Kconfig | 1 + drivers/misc/Makefile | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 2d6423c2d19..ba7f41863ce 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -506,5 +506,6 @@ source "drivers/misc/iwmc3200top/Kconfig" source "drivers/misc/ti-st/Kconfig" source "drivers/misc/lis3lv02d/Kconfig" source "drivers/misc/carma/Kconfig" +source "drivers/misc/modem_audio/Kconfig" endif # MISC_DEVICES diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 8f3efb68a14..6a775f4fa18 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -47,3 +47,4 @@ obj-$(CONFIG_AB8500_PWM) += ab8500-pwm.o obj-y += lis3lv02d/ obj-y += carma/ obj-$(CONFIG_USB_SWITCH_FSA9480) += fsa9480.o +obj-y += modem_audio/ -- cgit v1.2.3 From ab93b88c94dcf96cfc6daba570b75ea5024760c7 Mon Sep 17 00:00:00 2001 From: Philippe Langlais Date: Mon, 21 Nov 2011 17:11:53 +0100 Subject: misc: Compile modem specific misc drivers Signed-off-by: Philippe Langlais --- drivers/misc/Kconfig | 30 ++++++++++++++++++++++++++++++ drivers/misc/Makefile | 4 ++++ 2 files changed, 34 insertions(+) diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index ba7f41863ce..5c052d59a70 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -461,6 +461,20 @@ config ARM_CHARLCD line and the Linux version on the second line, but that's still useful. +config STE_TRACE_MODEM + tristate "DB8500 trace Modem" + depends on ARCH_U8500 + default n + help + Select this option to enable modem tracing by APE + +config DBX500_MLOADER + tristate "Modem firmware loader for db8500" + default n + depends on UX500_SOC_DB8500 || UX500_SOC_DB5500 + help + Provides a user interface to load modem firmware on dbx500 SOCs + config BMP085 tristate "BMP085 digital pressure sensor" depends on I2C && SYSFS @@ -490,6 +504,22 @@ config PCH_PHUB To compile this driver as a module, choose M here: the module will be called pch_phub. +config U5500_MBOX + bool "Mailbox support" + depends on (UX500_SOC_DB5500 && U5500_MODEM_IRQ) + default y + help + Add support for U5500 mailbox communication with modem side + +config U8500_SIM_DETECT + bool "Sim hot swap detection support" + depends on (MODEM && UX500_SOC_DB8500) + default n + help + Add support for sim hot swap detection support in U8500.Driver + basically wakes up the modem if its sleeping when sim hot plug + in/out has happened. + config USB_SWITCH_FSA9480 tristate "FSA9480 USB Switch" depends on I2C diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 6a775f4fa18..6556e226971 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -46,5 +46,9 @@ obj-y += ti-st/ obj-$(CONFIG_AB8500_PWM) += ab8500-pwm.o obj-y += lis3lv02d/ obj-y += carma/ +obj-$(CONFIG_STE_TRACE_MODEM) += db8500-modem-trace.o +obj-$(CONFIG_DBX500_MLOADER) += dbx500-mloader.o +obj-$(CONFIG_U5500_MBOX) += mbox.o mbox_channels-db5500.o +obj-$(CONFIG_U8500_SIM_DETECT) += sim_detect.o obj-$(CONFIG_USB_SWITCH_FSA9480) += fsa9480.o obj-y += modem_audio/ -- cgit v1.2.3