diff options
| author | Tom Warren <twarren@nvidia.com> | 2013-02-26 12:26:55 -0700 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2013-03-14 11:06:44 -0700 |
| commit | 190be1f9b74b0c8c2f1b2735774a6536758837af (patch) | |
| tree | 7e10f29ff2dc55ab098f0332151ca0bde8cdeb15 /board/nvidia/cardhu/cardhu.c | |
| parent | 38797bcb1f8306429409ca2831309342b77a2e37 (diff) | |
Tegra30: MMC: Add SD bus power-rail and SDMMC pad init routines
T30 requires specific SDMMC pad programming, and bus power-rail bringup.
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'board/nvidia/cardhu/cardhu.c')
| -rw-r--r-- | board/nvidia/cardhu/cardhu.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/board/nvidia/cardhu/cardhu.c b/board/nvidia/cardhu/cardhu.c index 08e9b7bd5b..3544b41cd0 100644 --- a/board/nvidia/cardhu/cardhu.c +++ b/board/nvidia/cardhu/cardhu.c @@ -25,6 +25,10 @@ #include <asm/arch/pinmux.h> #include <asm/arch/gp_padctrl.h> #include "pinmux-config-cardhu.h" +#include <i2c.h> + +#define PMU_I2C_ADDRESS 0x2D +#define MAX_I2C_RETRY 3 /* * Routine: pinmux_init @@ -41,3 +45,50 @@ void pinmux_init(void) /* Initialize any non-default pad configs (APB_MISC_GP regs) */ padgrp_config_table(cardhu_padctrl, ARRAY_SIZE(cardhu_padctrl)); } + +#if defined(CONFIG_TEGRA_MMC) +/* + * Do I2C/PMU writes to bring up SD card bus power + * + */ +void board_sdmmc_voltage_init(void) +{ + uchar reg, data_buffer[1]; + int i; + + i2c_set_bus_num(0); /* PMU is on bus 0 */ + + /* TPS659110: LDO5_REG = 3.3v, ACTIVE to SDMMC1 */ + data_buffer[0] = 0x65; + reg = 0x32; + + for (i = 0; i < MAX_I2C_RETRY; ++i) { + if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1)) + udelay(100); + } + + /* TPS659110: GPIO7_REG = PDEN, output a 1 to EN_3V3_SYS */ + data_buffer[0] = 0x09; + reg = 0x67; + + for (i = 0; i < MAX_I2C_RETRY; ++i) { + if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1)) + udelay(100); + } +} + +/* + * Routine: pin_mux_mmc + * Description: setup the MMC muxes, power rails, etc. + */ +void pin_mux_mmc(void) +{ + /* + * NOTE: We don't do mmc-specific pin muxes here. + * They were done globally in pinmux_init(). + */ + + /* Bring up the SDIO1 power rail */ + board_sdmmc_voltage_init(); +} +#endif /* MMC */ |