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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,
};
/*
* SDI1 (SD/MMC)
*/
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,
};
/*
* SDI3 (SDIO)
*/
static struct stedma40_chan_cfg sdi3_dma_cfg_rx = {
.dir = STEDMA40_PERIPH_TO_MEM,
.src_dev_type = DB5500_DMA_DEV27_SDMMC3_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 sdi3_dma_cfg_tx = {
.dir = STEDMA40_MEM_TO_PERIPH,
.src_dev_type = STEDMA40_DEV_SRC_MEMORY,
.dst_dev_type = DB5500_DMA_DEV27_SDMMC3_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,
.disable = 500,
.pm_flags = MMC_PM_KEEP_POWER,
.capabilities = MMC_CAP_4_BIT_DATA |
MMC_CAP_8_BIT_DATA |
MMC_CAP_MMC_HIGHSPEED |
MMC_CAP_DISABLE,
.gpio_cd = -1,
.gpio_wp = -1,
#ifdef CONFIG_STE_DMA40
.dma_filter = stedma40_filter,
.dma_rx_param = &sdi0_dma_cfg_rx,
.dma_tx_param = &sdi0_dma_cfg_tx,
#endif
};
static void u5500_sdi1_vdd_handler(struct device *dev, unsigned int vdd,
unsigned char power_mode)
{
switch (power_mode) {
case MMC_POWER_UP:
case MMC_POWER_ON:
/*
* 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.
*/
/* Enable level shifter */
gpio_direction_output(GPIO_MMC_CARD_CTRL, 1);
udelay(100);
break;
case MMC_POWER_OFF:
/* Disable level shifter */
gpio_direction_output(GPIO_MMC_CARD_CTRL, 0);
break;
}
}
static struct mmci_platform_data u5500_sdi1_data = {
.vcc = "v-mmc",
.vcard = "v-MMC-SD",
.vdd_handler = u5500_sdi1_vdd_handler,
.ocr_mask = MMC_VDD_29_30,
.disable = 500,
.f_max = 50000000,
.capabilities = MMC_CAP_4_BIT_DATA |
MMC_CAP_MMC_HIGHSPEED |
MMC_CAP_DISABLE,
.gpio_cd = GPIO_SDMMC_CD,
.gpio_wp = -1,
.cd_invert = true,
#ifdef CONFIG_STE_DMA40
.dma_filter = stedma40_filter,
.dma_rx_param = &sdi1_dma_cfg_rx,
.dma_tx_param = &sdi1_dma_cfg_tx,
#endif
};
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);
}
/*
* SDI3 (SDIO WLAN)
*/
static irqreturn_t sdio_irq(int irq, void *dev_id)
{
struct mmc_host *host = dev_id;
/*
* Signal an sdio irq for the sdio client.
* If we are in suspend state the host has been claimed
* by the pm framework, which prevents any sdio request
* to be served until the host gets resumed and released.
*/
mmc_signal_sdio_irq(host);
return IRQ_HANDLED;
}
static void sdio_config_irq(struct mmc_host *host,
bool cfg_as_dat1,
int irq_pin,
pin_cfg_t irq_dat1,
pin_cfg_t irq_gpio)
{
/*
* If the pin mux switch or interrupt registration fails we're in deep
* trouble and there is no decent recovery.
*/
if (!gpio_is_valid(irq_pin)) {
dev_err(mmc_dev(host),
"invalid irq pin (%d) for sdio irq\n", irq_pin);
return;
}
if (!cfg_as_dat1) {
/*
* SDIO irq shall be handled as a gpio irq. We configure the
* dat[1] as gpio and register a gpio irq handler.
*/
if (nmk_config_pin(irq_gpio, 0))
dev_err(mmc_dev(host),
"err config irq gpio (%lu) for sdio irq\n",
irq_gpio);
/* We use threaded irq */
if (request_threaded_irq(gpio_to_irq(irq_pin),
NULL,
sdio_irq,
IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
dev_driver_string(mmc_dev(host)),
host))
dev_err(mmc_dev(host),
"err request_threaded_irq for sdio irq\n");
/*
* Set the irq as a wakeup irq to be able to be woken up
* from the suspend state and thus trigger a resume of
* the system.
*/
if (enable_irq_wake(gpio_to_irq(irq_pin)))
dev_err(mmc_dev(host),
"err enabling wakeup irq for sdio irq\n");
/*
* Workaround to fix PL180 hw-problem of missing sdio irqs.
* If the DAT1 line has been asserted low we signal an sdio
* irq.
*/
if (gpio_request(irq_pin, dev_driver_string(mmc_dev(host))))
dev_err(mmc_dev(host),
"err requesting irq for sdio irq\n");
if (!gpio_get_value(irq_pin))
mmc_signal_sdio_irq(host);
gpio_free(irq_pin);
} else {
/*
* SDIO irq shall be handled as dat[1] irq by the mmci
* driver. Configure the gpio back into dat[1] and remove
* the gpio irq handler.
*/
if (disable_irq_wake(gpio_to_irq(irq_pin)))
dev_err(mmc_dev(host),
"err disabling wakeup irq for sdio irq\n");
free_irq(gpio_to_irq(irq_pin), host);
if (nmk_config_pin(irq_dat1, 0))
dev_err(mmc_dev(host),
"err config irq dat1 (%lu) for sdio irq\n",
irq_dat1);
}
}
static void wakeup_handler_sdi3(struct mmc_host *host, bool wakeup)
{
if (host->card && mmc_card_sdio(host->card) && host->sdio_irqs)
sdio_config_irq(host,
wakeup,
172,
GPIO172_MC3_DAT1 | PIN_INPUT_PULLUP,
GPIO172_GPIO | PIN_INPUT_PULLUP);
}
static struct mmci_platform_data u5500_sdi3_data = {
.vcc = "v-mmc",
.disable = 50,
.ocr_mask = MMC_VDD_29_30,
.f_max = 50000000,
.capabilities = MMC_CAP_4_BIT_DATA |
MMC_CAP_DISABLE |
MMC_CAP_SDIO_IRQ |
MMC_CAP_BROKEN_SDIO_CMD53,
.pm_flags = MMC_PM_KEEP_POWER,
.gpio_cd = -1,
.gpio_wp = -1,
.wakeup_handler = wakeup_handler_sdi3,
#ifdef CONFIG_STE_DMA40
.dma_filter = stedma40_filter,
.dma_rx_param = &sdi3_dma_cfg_rx,
.dma_tx_param = &sdi3_dma_cfg_tx,
#endif
};
static int __init u5500_mmc_init(void)
{
db5500_add_sdi0(&u5500_sdi0_data);
sdi1_configure();
db5500_add_sdi1(&u5500_sdi1_data);
db5500_add_sdi3(&u5500_sdi3_data);
return 0;
}
fs_initcall(u5500_mmc_init);
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