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/*
* Copyright (C) ST-Ericsson SA 2011
*
* Author: Chris Blair <chris.blair@stericsson.com> for ST-Ericsson
* based on shrm_driver.h
*
* License terms: GNU General Public License (GPL) version 2
*
* Modem IPC driver interface header.
*/
#ifndef _MODEM_DRIVER_H_
#define _MODEM_DRIVER_H_
#include <linux/device.h>
#include <linux/modem/modem.h>
#include <linux/cdev.h>
#include <linux/spi/spi.h>
/* driver L2 mux channels */
#ifdef CONFIG_MODEM_M6718_SPI_ENABLE_FEATURE_LOOPBACK
#define MODEM_M6718_SPI_MAX_CHANNELS (9)
#else
#define MODEM_M6718_SPI_MAX_CHANNELS (3)
#endif
#define MODEM_M6718_SPI_CHN_ISI (0)
/*#define MODEM_M6718_SPI_CHN_RPC (1) not supported */
#define MODEM_M6718_SPI_CHN_AUDIO (2)
/*#define MODEM_M6718_SPI_CHN_SECURITY (3) not supported */
/* (4) not supported */
#ifdef CONFIG_MODEM_M6718_SPI_ENABLE_FEATURE_LOOPBACK
#define MODEM_M6718_SPI_CHN_MASTER_LOOPBACK0 (5)
#define MODEM_M6718_SPI_CHN_SLAVE_LOOPBACK0 (6)
#define MODEM_M6718_SPI_CHN_MASTER_LOOPBACK1 (7)
#define MODEM_M6718_SPI_CHN_SLAVE_LOOPBACK1 (8)
#endif
/**
* 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
* @channel: L2 mux channel served by this queue
* @fifo_base: pointer to the respective fifo base
* @size: size of the data to be read
* @free: free space in the queue
* @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 read pointer is valid
* @wq_readable: wait queue head
* @msg_list: message list
* @modem_spi_dev: pointer to modem device information structure
*/
struct message_queue {
u8 channel;
u8 *fifo_base;
u32 size;
u32 free;
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 modem_spi_dev *modem_spi_dev;
};
/**
* struct isa_device_context - modem char interface device information
* @dl_queue: structre to store the queue related info
* @device_id: channel id (ISI, AUDIO, RPC, ...)
* @addr: device address
*/
struct isa_device_context {
struct message_queue dl_queue;
u8 device_id;
void *addr;
};
/**
* struct isa_driver_context - modem char interface driver information
* @is_open: flag to check the usage of queue
* @isadev: pointer to struct t_isadev_context
* @common_tx_lock: spinlock for protecting common channel
* @audio_tx_mutex: mutex for protecting audio channel
* @cdev: character device structre
* @modem_class: pointer to the class structure
*/
struct isa_driver_context {
atomic_t is_open[MODEM_M6718_SPI_MAX_CHANNELS];
struct isa_device_context *isadev;
spinlock_t common_tx_lock;
struct mutex audio_tx_mutex;
struct cdev cdev;
struct class *modem_class;
};
/**
* struct modem_spi_dev - modem device information
* @dev pointer to device
* @ndev pointer to net_device interface
* @modem pointer to registered modem structure
* @isa_context pointer to char device interface
* @netdev_flag_up: flag to indicate up/down of network device
* @msr_flag: flag to indicate modem-silent-reset is in progress
*/
struct modem_spi_dev {
struct device *dev;
struct net_device *ndev;
struct modem *modem;
struct isa_driver_context *isa_context;
int netdev_flag_up;
bool msr_flag;
};
/**
* struct modem_m6718_spi_link_gpio - gpio configuration for an IPC link
* @ss_pin: pins to use for slave-select
* @ss_active: active level for slave-select pin
* @int_pin: pin to use for slave-int (ready)
* @int_active: active level for slave-int
*/
struct modem_m6718_spi_link_gpio {
int ss_pin;
int ss_active;
int int_pin;
int int_active;
};
/**
* struct modem_m6718_spi_link_platform_data - IPC link data
* @id: link id
* @gpio: link gpio configuration
* @name: link name (to appear in debugfs)
*/
struct modem_m6718_spi_link_platform_data {
int id;
struct modem_m6718_spi_link_gpio gpio;
#ifdef CONFIG_DEBUG_FS
const char *name;
#endif
};
int modem_m6718_spi_receive(struct spi_device *sdev, u8 channel,
u32 len, void *data);
int modem_m6718_spi_send(struct modem_spi_dev *modem_spi_dev, u8 channel,
u32 len, void *data);
bool modem_m6718_spi_is_boot_done(void);
#endif /* _MODEM_DRIVER_H_ */
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