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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/amba/mmci.h>
#include <linux/mmc/host.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <plat/ste_dma40.h>
#include <plat/pincfg.h>
#include <mach/devices.h>
#include <mach/gpio.h>
#include <mach/ste-dma40-db5500.h>
#include "pins-db5500.h"
#include "devices-db5500.h"
#include "board-u5500.h"
/*
* SDI0 (EMMC)
*/
#ifdef CONFIG_STE_DMA40
struct stedma40_chan_cfg sdi0_dma_cfg_rx = {
.dir = STEDMA40_PERIPH_TO_MEM,
.src_dev_type = DB5500_DMA_DEV24_SDMMC0_RX,
.dst_dev_type = STEDMA40_DEV_DST_MEMORY,
.src_info.data_width = STEDMA40_WORD_WIDTH,
.dst_info.data_width = STEDMA40_WORD_WIDTH,
};
static struct stedma40_chan_cfg sdi0_dma_cfg_tx = {
.dir = STEDMA40_MEM_TO_PERIPH,
.src_dev_type = STEDMA40_DEV_SRC_MEMORY,
.dst_dev_type = DB5500_DMA_DEV24_SDMMC0_TX,
.src_info.data_width = STEDMA40_WORD_WIDTH,
.dst_info.data_width = STEDMA40_WORD_WIDTH,
};
#endif
/*
* SDI1 (SD/MMC)
*/
#ifdef CONFIG_STE_DMA40
static struct stedma40_chan_cfg sdi1_dma_cfg_rx = {
.dir = STEDMA40_PERIPH_TO_MEM,
.src_dev_type = DB5500_DMA_DEV25_SDMMC1_RX,
.dst_dev_type = STEDMA40_DEV_DST_MEMORY,
.src_info.data_width = STEDMA40_WORD_WIDTH,
.dst_info.data_width = STEDMA40_WORD_WIDTH,
};
static struct stedma40_chan_cfg sdi1_dma_cfg_tx = {
.dir = STEDMA40_MEM_TO_PERIPH,
.src_dev_type = STEDMA40_DEV_SRC_MEMORY,
.dst_dev_type = DB5500_DMA_DEV25_SDMMC1_TX,
.src_info.data_width = STEDMA40_WORD_WIDTH,
.dst_info.data_width = STEDMA40_WORD_WIDTH,
};
#endif
static struct mmci_platform_data u5500_sdi0_data = {
.vcc = "v-mmc",
.ocr_mask = MMC_VDD_165_195,
.f_max = 50000000,
.capabilities = MMC_CAP_4_BIT_DATA |
MMC_CAP_MMC_HIGHSPEED |
MMC_CAP_DISABLE,
.gpio_cd = -1,
.gpio_wp = -1,
};
static void u5500_sdi1_vdd_handler(struct device *dev, unsigned int vdd,
unsigned char power_mode)
{
/*
* Level shifter voltage should depend on vdd to when deciding
* on either 1.8V or 2.9V. Once the decision has been made the
* level shifter must be disabled and re-enabled with a changed
* select signal in order to switch the voltage. Since there is
* no framework support yet for indicating 1.8V in vdd, use the
* default 2.9V.
*/
if (power_mode == MMC_POWER_UP)
gpio_set_value_cansleep(GPIO_MMC_CARD_CTRL, 1);
else if (power_mode == MMC_POWER_OFF)
gpio_set_value_cansleep(GPIO_MMC_CARD_CTRL, 0);
}
static struct mmci_platform_data u5500_sdi1_data = {
.vcc = "v-mmc",
.vdd_handler = u5500_sdi1_vdd_handler,
.ocr_mask = MMC_VDD_29_30,
.f_max = 50000000,
.capabilities = MMC_CAP_4_BIT_DATA |
MMC_CAP_SD_HIGHSPEED |
MMC_CAP_MMC_HIGHSPEED |
MMC_CAP_DISABLE,
.gpio_cd = GPIO_SDMMC_CD,
.gpio_wp = -1,
.cd_invert = true,
};
static void sdi1_configure(void)
{
int pin[2];
int ret;
/* Level-shifter GPIOs */
pin[0] = GPIO_MMC_CARD_CTRL;
pin[1] = GPIO_MMC_CARD_VSEL;
ret = gpio_request(pin[0], "MMC_CARD_CTRL");
if (!ret)
ret = gpio_request(pin[1], "MMC_CARD_VSEL");
if (ret) {
pr_err("mach-u5500: error in configuring \
GPIO pins for MMC\n");
return;
}
/* Select the default 2.9V and eanble level shifter */
gpio_direction_output(pin[0], 1);
gpio_direction_output(pin[1], 1);
}
static int __init u5500_mmc_init(void)
{
db5500_add_sdi0(&u5500_sdi0_data);
sdi1_configure();
db5500_add_sdi1(&u5500_sdi1_data);
}
fs_initcall(u5500_mmc_init);
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