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 --- arch/arm/include/asm/arch-omap4/omap4.h | 1 + drivers/mmc/omap_hsmmc.c | 28 +++++++++++++++++++++++++--- drivers/power/twl6030.c | 7 +++++++ include/configs/omap4_sdp4430.h | 2 ++ include/twl6030.h | 3 +++ 5 files changed, 38 insertions(+), 3 deletions(-)
diff --git a/arch/arm/include/asm/arch-omap4/omap4.h b/arch/arm/include/asm/arch-omap4/omap4.h index 9aad0e6..13fc8c9 100644 --- a/arch/arm/include/asm/arch-omap4/omap4.h +++ b/arch/arm/include/asm/arch-omap4/omap4.h @@ -55,6 +55,7 @@ #define LPDDR2_IO_REGS_BASE 0x4A100638
#define CONTROL_EFUSE_2 0x4A100704 +#define CONTROL_PBIASLITE 0x4A100600
/* CONTROL_ID_CODE */ #define CONTROL_ID_CODE 0x4A002204 diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c index 6627905..95bb661 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 +39,24 @@ 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; + + value = readl(CONTROL_PBIASLITE); + value &= ~((1 << 22) | (1 << 26)); + writel(value, CONTROL_PBIASLITE); + /* set VMMC to 3V */ + twl6030_power_mmc_init(); + value = readl(CONTROL_PBIASLITE); + value |= (1 << 21) | (1 << 22) | (1 << 26); + writel(value, CONTROL_PBIASLITE); +} +#endif + +unsigned char mmc_board_init(struct mmc *mmc) { #if defined(CONFIG_TWL4030_POWER) twl4030_power_mmc_init(); @@ -67,7 +85,11 @@ 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 +130,7 @@ 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); diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c index fef57b4..c5a0038 100644 --- a/drivers/power/twl6030.c +++ b/drivers/power/twl6030.c @@ -182,6 +182,13 @@ void twl6030_init_battery_charging(void) return; }
+void twl6030_power_mmc_init() +{ + /* set voltage to 3.0 and turnon for APP */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, 0x15, VMMC_CFG_VOLTATE); + twl6030_i2c_write_u8(TWL6030_CHIP_PM, 0x21, VMMC_CFG_STATE); +} + void twl6030_usb_device_settings() { u8 data = 0; diff --git a/include/configs/omap4_sdp4430.h b/include/configs/omap4_sdp4430.h index 5b3110c..50797ab 100644 --- a/include/configs/omap4_sdp4430.h +++ b/include/configs/omap4_sdp4430.h @@ -98,8 +98,10 @@ #define CONFIG_I2C_MULTI_BUS 1
/* TWL6030 */ +#ifndef CONFIG_SPL_BUILD #define CONFIG_TWL6030_POWER 1 #define CONFIG_CMD_BAT 1 +#endif
/* MMC */ #define CONFIG_GENERIC_MMC 1 diff --git a/include/twl6030.h b/include/twl6030.h index 6ed68a0..a9fcadb 100644 --- a/include/twl6030.h +++ b/include/twl6030.h @@ -33,6 +33,8 @@ #define TWL6030_CHIP_PWM 0x49
/* Slave Address 0x48 */ +#define VMMC_CFG_STATE 0x9A +#define VMMC_CFG_VOLTATE 0x9B #define VUSB_CFG_STATE 0xA2
#define MISC1 0xE4 @@ -130,3 +132,4 @@ void twl6030_start_usb_charging(void); void twl6030_stop_usb_charging(void); int twl6030_get_battery_voltage(void); int twl6030_get_battery_current(void); +void twl6030_power_mmc_init(void);