diff options
| author | Balaji T K <balajitk@ti.com> | 2011-09-08 06:34:57 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-09-30 22:00:55 +0200 |
| commit | 14fa2dd00f4f996c9583c8fba63bfa03f5025ec3 (patch) | |
| tree | ba54542fd79b3f228ec80d87abd0b41ff743c7de /drivers/mmc/omap_hsmmc.c | |
| parent | ecd9af88ac70dec7f0ea33613da2f889cf19e433 (diff) | |
mmc: omap: config VMMC, MMC1_PBIAS
Config VMMC voltage to 3V for MMC/SD card slot
and PBIAS settings needed for OMAP4
Fixes MMC/SD detection on boot from eMMC.
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Diffstat (limited to 'drivers/mmc/omap_hsmmc.c')
| -rw-r--r-- | drivers/mmc/omap_hsmmc.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c index 662790509c..5d4cf51104 100644 --- a/drivers/mmc/omap_hsmmc.c +++ b/drivers/mmc/omap_hsmmc.c @@ -28,6 +28,7 @@ #include <part.h> #include <i2c.h> #include <twl4030.h> +#include <twl6030.h> #include <asm/io.h> #include <asm/arch/mmc_host_def.h> #include <asm/arch/sys_proto.h> @@ -38,7 +39,27 @@ static int mmc_read_data(hsmmc_t *mmc_base, char *buf, unsigned int size); static int mmc_write_data(hsmmc_t *mmc_base, const char *buf, unsigned int siz); static struct mmc hsmmc_dev[2]; -unsigned char mmc_board_init(hsmmc_t *mmc_base) + +#if defined(CONFIG_OMAP44XX) && defined(CONFIG_TWL6030_POWER) +static void omap4_vmmc_pbias_config(struct mmc *mmc) +{ + u32 value = 0; + struct omap4_sys_ctrl_regs *const ctrl = + (struct omap4_sys_ctrl_regs *)SYSCTRL_GENERAL_CORE_BASE; + + + value = readl(&ctrl->control_pbiaslite); + value &= ~(MMC1_PBIASLITE_PWRDNZ | MMC1_PWRDNZ); + writel(value, &ctrl->control_pbiaslite); + /* set VMMC to 3V */ + twl6030_power_mmc_init(); + value = readl(&ctrl->control_pbiaslite); + value |= MMC1_PBIASLITE_VMODE | MMC1_PBIASLITE_PWRDNZ | MMC1_PWRDNZ; + writel(value, &ctrl->control_pbiaslite); +} +#endif + +unsigned char mmc_board_init(struct mmc *mmc) { #if defined(CONFIG_TWL4030_POWER) twl4030_power_mmc_init(); @@ -67,7 +88,11 @@ unsigned char mmc_board_init(hsmmc_t *mmc_base) &prcm_base->iclken1_core); #endif -/* TODO add appropriate OMAP4 init - none currently necessary */ +#if defined(CONFIG_OMAP44XX) && defined(CONFIG_TWL6030_POWER) + /* PBIAS config needed for MMC1 only */ + if (mmc->block_dev.dev == 0) + omap4_vmmc_pbias_config(mmc); +#endif return 0; } @@ -108,7 +133,7 @@ static int mmc_init_setup(struct mmc *mmc) unsigned int dsor; ulong start; - mmc_board_init(mmc_base); + mmc_board_init(mmc); writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET, &mmc_base->sysconfig); |