diff options
Diffstat (limited to 'board/st/u8500/prcmu.c')
| -rw-r--r-- | board/st/u8500/prcmu.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/board/st/u8500/prcmu.c b/board/st/u8500/prcmu.c deleted file mode 100644 index e411d1a1c..000000000 --- a/board/st/u8500/prcmu.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Copyright (C) 2009 ST-Ericsson SA - * - * 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. - * - * Adapted from the Linux version: - * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com> - */ - -/* - * NOTE: This currently does not support the I2C workaround access method. - */ - -#include <common.h> -#include <config.h> -#include <asm/io.h> -#include <asm/arch/hardware.h> -#include <asm/types.h> -#include <asm/io.h> -#include <asm/errno.h> - -#include <asm/arch/ab8500.h> - -#include <asm/arch/common.h> -#include "prcmu-fw-defs_v1.h" - -#define DEBUG 0 -#define dbg_printk(format, arg...) \ - if (DEBUG) \ - printf("prcmu: " format, ##arg) \ - -#define PRCMU_BASE U8500_PRCMU_BASE - -#define PRCM_MBOX_CPU_VAL (PRCMU_BASE + 0x0fc) -#define PRCM_MBOX_CPU_SET (PRCMU_BASE + 0x100) - -#define PRCM_XP70_CUR_PWR_STATE (tcdm_base + 0xFFC) - -#define PRCM_REQ_MB5 (tcdm_base + 0xE44) -#define PRCM_ACK_MB5 (tcdm_base + 0xDF4) - -/* Mailbox 5 Requests */ -#define PRCM_REQ_MB5_I2COPTYPE_REG (PRCM_REQ_MB5 + 0x0) -#define PRCM_REQ_MB5_BIT_FIELDS (PRCM_REQ_MB5 + 0x1) -#define PRCM_REQ_MB5_I2CSLAVE (PRCM_REQ_MB5 + 0x2) -#define PRCM_REQ_MB5_I2CVAL (PRCM_REQ_MB5 + 0x3) - -/* Mailbox 5 ACKs */ -#define PRCM_ACK_MB5_STATUS (PRCM_ACK_MB5 + 0x1) -#define PRCM_ACK_MB5_SLAVE (PRCM_ACK_MB5 + 0x2) -#define PRCM_ACK_MB5_VAL (PRCM_ACK_MB5 + 0x3) - -#define PRCMU_I2C_WRITE(slave) \ - (((slave) << 1) | I2CWRITE | (cpu_is_u8500v2() ? (1 << 6) : 0)) - -#define PRCMU_I2C_READ(slave) \ - (((slave) << 1) | I2CREAD | (cpu_is_u8500v2() ? (1 << 6) : 0)) - -enum mailbox_t { - REQ_MB0 = 0, /* Uses XP70_IT_EVENT_10 */ - REQ_MB1 = 1, /* Uses XP70_IT_EVENT_11 */ - REQ_MB2 = 2, /* Uses XP70_IT_EVENT_12 */ - REQ_MB5 = 5, /* Uses XP70_IT_EVENT_17 */ -}; - -static void *tcdm_base; - -static int prcmu_is_ready(void) -{ - int ready; - - if (!tcdm_base) { - if (cpu_is_u8500v1()) - tcdm_base = (void *) U8500_PRCMU_TCDM_BASE_V1; - else if (cpu_is_u8500v2()) - tcdm_base = (void *) U8500_PRCMU_TCDM_BASE; - else { - printf("PRCMU: Unsupported chip version\n"); - return 0; - } - } - - ready = readb(PRCM_XP70_CUR_PWR_STATE) == AP_EXECUTE; - if (!ready) - printf("PRCMU firmware not ready\n"); - - return ready; -} - -static int _wait_for_req_complete(enum mailbox_t num) -{ - int timeout = 1000; - - /* checking any already on-going transaction */ - while ((readl(PRCM_MBOX_CPU_VAL) & (1 << num)) && timeout--) - ; - - timeout = 1000; - - /* Set an interrupt to XP70 */ - writel(1 << num, PRCM_MBOX_CPU_SET); - - while ((readl(PRCM_MBOX_CPU_VAL) & (1 << num)) && timeout--) - ; - - if (!timeout) { - printf("PRCMU operation timed out\n"); - return -1; - } - - return 0; -} - -/** - * prcmu_i2c_read - PRCMU - 4500 communication using PRCMU I2C - * @reg: - db8500 register bank to be accessed - * @slave: - db8500 register to be accessed - * Returns: ACK_MB5 value containing the status - */ -int prcmu_i2c_read(u8 reg, u16 slave) -{ - uint8_t i2c_status; - uint8_t i2c_val; - - if (!prcmu_is_ready()) - return -1; - - dbg_printk("\nprcmu_4500_i2c_read:bank=%x;reg=%x;\n", - reg, slave); - - /* prepare the data for mailbox 5 */ - writeb(PRCMU_I2C_READ(reg), PRCM_REQ_MB5_I2COPTYPE_REG); - writeb((1 << 3) | 0x0, PRCM_REQ_MB5_BIT_FIELDS); - writeb(slave, PRCM_REQ_MB5_I2CSLAVE); - writeb(0, PRCM_REQ_MB5_I2CVAL); - - _wait_for_req_complete(REQ_MB5); - - /* retrieve values */ - dbg_printk("ack-mb5:transfer status = %x\n", - readb(PRCM_ACK_MB5_STATUS)); - dbg_printk("ack-mb5:reg bank = %x\n", readb(PRCM_ACK_MB5) >> 1); - dbg_printk("ack-mb5:slave_add = %x\n", - readb(PRCM_ACK_MB5_SLAVE)); - dbg_printk("ack-mb5:reg_val = %d\n", readb(PRCM_ACK_MB5_VAL)); - - i2c_status = readb(PRCM_ACK_MB5_STATUS); - i2c_val = readb(PRCM_ACK_MB5_VAL); - - if (i2c_status == I2C_RD_OK) - return i2c_val; - else { - - printf("prcmu_i2c_read:read return status= %d\n", - i2c_status); - return -1; - } - -} - -/** - * prcmu_i2c_write - PRCMU-db8500 communication using PRCMU I2C - * @reg: - db8500 register bank to be accessed - * @slave: - db800 register to be written to - * @reg_data: - the data to write - * Returns: ACK_MB5 value containing the status - */ -int prcmu_i2c_write(u8 reg, u16 slave, u8 reg_data) -{ - uint8_t i2c_status; - - if (!prcmu_is_ready()) - return -1; - - dbg_printk("\nprcmu_4500_i2c_write:bank=%x;reg=%x;\n", - reg, slave); - - /* prepare the data for mailbox 5 */ - writeb(PRCMU_I2C_WRITE(reg), PRCM_REQ_MB5_I2COPTYPE_REG); - writeb((1 << 3) | 0x0, PRCM_REQ_MB5_BIT_FIELDS); - writeb(slave, PRCM_REQ_MB5_I2CSLAVE); - writeb(reg_data, PRCM_REQ_MB5_I2CVAL); - - dbg_printk("\ncpu_is_u8500v11\n"); - _wait_for_req_complete(REQ_MB5); - - /* retrieve values */ - dbg_printk("ack-mb5:transfer status = %x\n", - readb(PRCM_ACK_MB5_STATUS)); - dbg_printk("ack-mb5:reg bank = %x\n", readb(PRCM_ACK_MB5) >> 1); - dbg_printk("ack-mb5:slave_add = %x\n", - readb(PRCM_ACK_MB5_SLAVE)); - dbg_printk("ack-mb5:reg_val = %d\n", readb(PRCM_ACK_MB5_VAL)); - - i2c_status = readb(PRCM_ACK_MB5_STATUS); - dbg_printk("\ni2c_status = %x\n", i2c_status); - if (i2c_status == I2C_WR_OK) - return 0; - else { - printf("ape-i2c: i2c_status : 0x%x\n", i2c_status); - return -1; - } -} |