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/*
* Copyright (C) 2010 ST-Ericsson
*
* 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 <linux/platform_device.h>
#include <linux/amba/bus.h>
#include <linux/mmc/host.h>
#include <linux/delay.h>
#include <mach/devices.h>
#include <mach/mmc.h>
#include <mach/stmpe2401.h>
#include <mach/tc35892.h>
#include <mach/ab8500.h>
/*
* SDI0 (SD/MMC card)
*/
static int mmc_configure(struct amba_device *dev)
{
int pin[2];
int ret;
int i;
/* Level-shifter GPIOs */
if (MOP500_PLATFORM_ID == platform_id) {
pin[0] = EGPIO_PIN_18;
pin[1] = EGPIO_PIN_19;
} else if (HREF_PLATFORM_ID == platform_id) {
pin[0] = EGPIO_PIN_17;
pin[1] = EGPIO_PIN_18;
} else
BUG();
ret = gpio_request(pin[0], "level shifter");
if (!ret)
ret = gpio_request(pin[1], "level shifter");
if (!ret) {
gpio_direction_output(pin[0], 1);
gpio_direction_output(pin[1], 1);
gpio_set_value(pin[0], 1);
gpio_set_value(pin[1], 1);
} else
dev_err(&dev->dev, "unable to configure gpios\n");
#if defined(CONFIG_GPIO_TC35892)
if (HREF_PLATFORM_ID == platform_id) {
/* Enabling the card detection interrupt */
tc35892_set_gpio_intr_conf(EGPIO_PIN_3, EDGE_SENSITIVE,
TC35892_BOTH_EDGE);
tc35892_set_intr_enable(EGPIO_PIN_3, ENABLE_INTERRUPT);
}
#endif
for (i = 18; i <= 28; i++) {
gpio_set_value(i, GPIO_HIGH);
gpio_set_value(i, GPIO_PULLUP_DIS);
}
stm_gpio_altfuncenable(GPIO_ALT_SDMMC);
return ret;
}
static void mmc_set_power(struct device *dev, int power_on)
{
if (platform_id == MOP500_PLATFORM_ID)
gpio_set_value(EGPIO_PIN_18, !!power_on);
else if (platform_id == HREF_PLATFORM_ID)
gpio_set_value(EGPIO_PIN_17, !!power_on);
}
static void mmc_restore_default(struct amba_device *dev)
{
}
static int mmc_card_detect(void (*callback)(void *parameter), void *host)
{
/*
* Card detection interrupt request
*/
#if defined(CONFIG_GPIO_STMPE2401)
if (MOP500_PLATFORM_ID == platform_id)
stmpe2401_set_callback(EGPIO_PIN_16, callback, host);
#endif
#if defined(CONFIG_GPIO_TC35892)
if (HREF_PLATFORM_ID == platform_id) {
tc35892_set_gpio_intr_conf(EGPIO_PIN_3, EDGE_SENSITIVE, TC35892_BOTH_EDGE);
tc35892_set_intr_enable(EGPIO_PIN_3, ENABLE_INTERRUPT);
tc35892_set_callback(EGPIO_PIN_3, callback, host);
}
#endif
return 0;
}
static int mmc_get_carddetect_intr_value(void)
{
int status = 0;
if (MOP500_PLATFORM_ID == platform_id)
status = gpio_get_value(EGPIO_PIN_16);
else if (HREF_PLATFORM_ID == platform_id)
status = gpio_get_value(EGPIO_PIN_3);
return status;
}
static struct mmc_board mmc_data = {
.init = mmc_configure,
.exit = mmc_restore_default,
.set_power = mmc_set_power,
.card_detect = mmc_card_detect,
.card_detect_intr_value = mmc_get_carddetect_intr_value,
.dma_fifo_addr = U8500_SDI0_BASE + SD_MMC_TX_RX_REG_OFFSET,
.dma_fifo_dev_type_rx = DMA_DEV_SD_MMC0_RX,
.dma_fifo_dev_type_tx = DMA_DEV_SD_MMC0_TX,
.level_shifter = 1,
.caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
MMC_CAP_MMC_HIGHSPEED,
};
/*
* SDI1 (SDIO WLAN)
*/
/* sdio specific configurations */
static int sdio_configure(struct amba_device *dev)
{
int i;
gpio_direction_output(215,GPIO_HIGH);
gpio_set_value(215,GPIO_LOW);
mdelay(10);
gpio_set_value(213,GPIO_HIGH);
mdelay(10);
gpio_set_value(215,GPIO_HIGH);
mdelay(10);
gpio_set_value(213,GPIO_LOW);
mdelay(10);
for (i = 208; i <= 214; i++) {
gpio_set_value(i, GPIO_HIGH);
gpio_set_value(i, GPIO_PULLUP_DIS);
}
stm_gpio_altfuncenable(GPIO_ALT_SDIO);
return 0;
}
static void sdio_restore_default(struct amba_device *dev)
{
stm_gpio_altfuncdisable(GPIO_ALT_SDIO);
}
static struct mmc_board sdi1_data = {
.init = sdio_configure,
.exit = sdio_restore_default,
.dma_fifo_addr = U8500_SDI1_BASE + SD_MMC_TX_RX_REG_OFFSET,
.dma_fifo_dev_type_rx = DMA_DEV_SD_MM1_RX,
.dma_fifo_dev_type_tx = DMA_DEV_SD_MM1_TX,
.level_shifter = 0,
#ifdef CONFIG_U8500_SDIO_CARD_IRQ
.caps = (MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ),
#else
.caps = MMC_CAP_4_BIT_DATA,
#endif
.is_sdio = 1,
};
/*
* SDI2 (POPed eMMC on v1)
*/
static int sdi2_init(struct amba_device *dev)
{
int i;
for (i = 128; i <= 138; i++) {
gpio_set_value(i, GPIO_HIGH);
gpio_set_value(i, GPIO_PULLUP_DIS);
}
stm_gpio_altfuncenable(GPIO_ALT_SDMMC2);
return 0;
}
static void sdi2_exit(struct amba_device *dev)
{
stm_gpio_altfuncdisable(GPIO_ALT_SDMMC2);
}
static struct mmc_board sdi2_data = {
.init = sdi2_init,
.exit = sdi2_exit,
.dma_fifo_addr = U8500_SDI2_BASE + SD_MMC_TX_RX_REG_OFFSET,
.dma_fifo_dev_type_rx = DMA_DEV_SD_MMC2_RX,
.dma_fifo_dev_type_tx = DMA_DEV_SD_MMC2_TX,
.level_shifter = 0,
.caps = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
};
/*
* SDI4 (On-board EMMC)
*/
static int emmc_configure(struct amba_device *dev)
{
int i;
for (i = 197; i <= 207; i++) {
gpio_set_value(i, GPIO_HIGH);
gpio_set_value(i, GPIO_PULLUP_DIS);
}
stm_gpio_altfuncenable(GPIO_ALT_EMMC);
#ifndef CONFIG_REGULATOR
if (!cpu_is_u8500ed()) {
int val;
/* On V1 MOP, regulator to on-board eMMC is off by default */
val = ab8500_read(AB8500_REGU_CTRL2,
AB8500_REGU_VAUX12_REGU_REG);
ab8500_write(AB8500_REGU_CTRL2, AB8500_REGU_VAUX12_REGU_REG,
val | 0x4);
val = ab8500_read(AB8500_REGU_CTRL2,
AB8500_REGU_VAUX2_SEL_REG);
ab8500_write(AB8500_REGU_CTRL2, AB8500_REGU_VAUX2_SEL_REG,
0x0C);
}
#endif
return 0;
}
static void emmc_restore_default(struct amba_device *dev)
{
stm_gpio_altfuncdisable(GPIO_ALT_EMMC);
}
static struct mmc_board emmc_data = {
.init = emmc_configure,
.exit = emmc_restore_default,
.dma_fifo_addr = U8500_SDI4_BASE + SD_MMC_TX_RX_REG_OFFSET,
.dma_fifo_dev_type_rx = DMA_DEV_SD_MM4_RX,
.dma_fifo_dev_type_tx = DMA_DEV_SD_MM4_TX,
.caps = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA | MMC_CAP_MMC_HIGHSPEED,
#ifdef CONFIG_REGULATOR
.supply = "v-eMMC" /* tying to VAUX1 regulator */
#endif
};
static int __init mop500_sdi_init(void)
{
if (!cpu_is_u8500ed())
u8500_register_amba_device(&u8500_sdi2_device, &sdi2_data);
u8500_register_amba_device(&u8500_sdi4_device, &emmc_data);
u8500_register_amba_device(&u8500_sdi0_device, &mmc_data);
#ifdef CONFIG_U8500_SDIO
u8500_register_amba_device(&u8500_sdi1_device, &sdi1_data);
#endif
return 0;
}
fs_initcall(mop500_sdi_init);
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