From patchwork Tue Mar 12 16:17:10 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [U-Boot,3/4] Tegra114: MMC: Add SD bus power-rail init routine From: Tom Warren X-Patchwork-Id: 227076 Message-Id: <1363105031-30296-4-git-send-email-twarren@nvidia.com> To: u-boot@lists.denx.de Cc: swarren@nvidia.com, afleming@freescale.com, Tom Warren , twarren.nvidia@gmail.com Date: Tue, 12 Mar 2013 09:17:10 -0700 T114 requires SD bus power-rail bringup for the SDIO card on SDMMC3. Signed-off-by: Tom Warren --- board/nvidia/dalmore/dalmore.c | 75 ++++++++++++++++++++++++++++++++++++++++ 1 files changed, 75 insertions(+), 0 deletions(-) diff --git a/board/nvidia/dalmore/dalmore.c b/board/nvidia/dalmore/dalmore.c index 7449b5b..43f377b 100644 --- a/board/nvidia/dalmore/dalmore.c +++ b/board/nvidia/dalmore/dalmore.c @@ -18,6 +18,11 @@ #include #include #include "pinmux-config-dalmore.h" +#include + +#define BAT_I2C_ADDRESS 0x48 /* TPS65090 charger */ +#define PMU_I2C_ADDRESS 0x58 /* TPS65913 PMU */ +#define MAX_I2C_RETRY 3 /* * Routine: pinmux_init @@ -37,3 +42,73 @@ void pinmux_init(void) /* Initialize any non-default pad configs (APB_MISC_GP regs) */ padgrp_config_table(dalmore_padctrl, ARRAY_SIZE(dalmore_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, ret; + + ret = i2c_set_bus_num(0);/* PMU is on bus 0 */ + if (ret) + printf("%s: i2c_set_bus_num returned %d\n", __func__, ret); + + /* TPS65913: LDO9_VOLTAGE = 3.3V */ + data_buffer[0] = 0x31; + reg = 0x61; + + for (i = 0; i < MAX_I2C_RETRY; ++i) { + ret = i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1); + if (ret) { + udelay(100); + printf("%s: PMU i2c_write %02X<-%02X returned %d\n", + __func__, reg, data_buffer[0], ret); + } + } + + /* TPS65913: LDO9_CTRL = Active */ + data_buffer[0] = 0x01; + reg = 0x60; + + for (i = 0; i < MAX_I2C_RETRY; ++i) { + ret = i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1); + if (ret) { + udelay(100); + printf("%s: PMU i2c_write %02X<-%02X returned %d\n", + __func__, reg, data_buffer[0], ret); + } + } + + /* TPS65090: FET6_CTRL = enable output auto discharge, enable FET6 */ + data_buffer[0] = 0x03; + reg = 0x14; + + for (i = 0; i < MAX_I2C_RETRY; ++i) { + ret = i2c_write(BAT_I2C_ADDRESS, reg, 1, data_buffer, 1); + if (ret) { + udelay(100); + printf("%s: BAT i2c_write %02X<-%02X returned %d\n", + __func__, reg, data_buffer[0], ret); + } + } +} + +/* + * 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 SDIO3 power rail */ + board_sdmmc_voltage_init(); +} +#endif /* MMC */