/* linux/arch/arm/mach-msm/board-trout-mmc.c ** Author: Brian Swetland <swetland@google.com> */ #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/gpio.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; }