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/* linux/arch/arm/mach-msm/board-trout-mmc.c
** Author: Brian Swetland <swetland@google.com>
*/
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/err.h>
#include <linux/debugfs.h>
#include <asm/io.h>
#include <mach/vreg.h>
#include <mach/mmc.h>
#include "devices.h"
#include "board-trout.h"
#include "proc_comm.h"
#define DEBUG_SDSLOT_VDD 1
/* ---- COMMON ---- */
static void config_gpio_table(uint32_t *table, int len)
{
int n;
unsigned id;
for(n = 0; n < len; n++) {
id = table[n];
msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &id, 0);
}
}
/* ---- SDCARD ---- */
static uint32_t sdcard_on_gpio_table[] = {
PCOM_GPIO_CFG(62, 2, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_8MA), /* CLK */
PCOM_GPIO_CFG(63, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* CMD */
PCOM_GPIO_CFG(64, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT3 */
PCOM_GPIO_CFG(65, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT2 */
PCOM_GPIO_CFG(66, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT1 */
PCOM_GPIO_CFG(67, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT0 */
};
static uint32_t sdcard_off_gpio_table[] = {
PCOM_GPIO_CFG(62, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CLK */
PCOM_GPIO_CFG(63, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CMD */
PCOM_GPIO_CFG(64, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT3 */
PCOM_GPIO_CFG(65, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT2 */
PCOM_GPIO_CFG(66, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT1 */
PCOM_GPIO_CFG(67, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT0 */
};
static uint opt_disable_sdcard;
static int __init trout_disablesdcard_setup(char *str)
{
int cal = simple_strtol(str, NULL, 0);
opt_disable_sdcard = cal;
return 1;
}
__setup("board_trout.disable_sdcard=", trout_disablesdcard_setup);
static struct vreg *vreg_sdslot; /* SD slot power */
struct mmc_vdd_xlat {
int mask;
int level;
};
static struct mmc_vdd_xlat mmc_vdd_table[] = {
{ MMC_VDD_165_195, 1800 },
{ MMC_VDD_20_21, 2050 },
{ MMC_VDD_21_22, 2150 },
{ MMC_VDD_22_23, 2250 },
{ MMC_VDD_23_24, 2350 },
{ MMC_VDD_24_25, 2450 },
{ MMC_VDD_25_26, 2550 },
{ MMC_VDD_26_27, 2650 },
{ MMC_VDD_27_28, 2750 },
{ MMC_VDD_28_29, 2850 },
{ MMC_VDD_29_30, 2950 },
};
static unsigned int sdslot_vdd = 0xffffffff;
static unsigned int sdslot_vreg_enabled;
static uint32_t trout_sdslot_switchvdd(struct device *dev, unsigned int vdd)
{
int i, rc;
BUG_ON(!vreg_sdslot);
if (vdd == sdslot_vdd)
return 0;
sdslot_vdd = vdd;
if (vdd == 0) {
#if DEBUG_SDSLOT_VDD
printk("%s: Disabling SD slot power\n", __func__);
#endif
config_gpio_table(sdcard_off_gpio_table,
ARRAY_SIZE(sdcard_off_gpio_table));
vreg_disable(vreg_sdslot);
sdslot_vreg_enabled = 0;
return 0;
}
if (!sdslot_vreg_enabled) {
rc = vreg_enable(vreg_sdslot);
if (rc) {
printk(KERN_ERR "%s: Error enabling vreg (%d)\n",
__func__, rc);
}
config_gpio_table(sdcard_on_gpio_table,
ARRAY_SIZE(sdcard_on_gpio_table));
sdslot_vreg_enabled = 1;
}
for (i = 0; i < ARRAY_SIZE(mmc_vdd_table); i++) {
if (mmc_vdd_table[i].mask == (1 << vdd)) {
#if DEBUG_SDSLOT_VDD
printk("%s: Setting level to %u\n",
__func__, mmc_vdd_table[i].level);
#endif
rc = vreg_set_level(vreg_sdslot,
mmc_vdd_table[i].level);
if (rc) {
printk(KERN_ERR
"%s: Error setting vreg level (%d)\n",
__func__, rc);
}
return 0;
}
}
printk(KERN_ERR "%s: Invalid VDD %d specified\n", __func__, vdd);
return 0;
}
static unsigned int trout_sdslot_status(struct device *dev)
{
unsigned int status;
status = (unsigned int) gpio_get_value(TROUT_GPIO_SDMC_CD_N);
return (!status);
}
#define TROUT_MMC_VDD MMC_VDD_165_195 | MMC_VDD_20_21 | MMC_VDD_21_22 \
| MMC_VDD_22_23 | MMC_VDD_23_24 | MMC_VDD_24_25 \
| MMC_VDD_25_26 | MMC_VDD_26_27 | MMC_VDD_27_28 \
| MMC_VDD_28_29 | MMC_VDD_29_30
static struct msm_mmc_platform_data trout_sdslot_data = {
.ocr_mask = TROUT_MMC_VDD,
.status = trout_sdslot_status,
.translate_vdd = trout_sdslot_switchvdd,
};
int __init trout_init_mmc(unsigned int sys_rev)
{
sdslot_vreg_enabled = 0;
vreg_sdslot = vreg_get(0, "gp6");
if (IS_ERR(vreg_sdslot))
return PTR_ERR(vreg_sdslot);
irq_set_irq_wake(TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 1);
if (!opt_disable_sdcard)
msm_add_sdcc(2, &trout_sdslot_data,
TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 0);
else
printk(KERN_INFO "trout: SD-Card interface disabled\n");
return 0;
}
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