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https://github.com/brain-hackers/u-boot-brain
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190be1f9b7
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>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*
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* (C) Copyright 2010-2013
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* NVIDIA Corporation <www.nvidia.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/arch/pinmux.h>
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#include <asm/arch/gp_padctrl.h>
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#include "pinmux-config-cardhu.h"
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#include <i2c.h>
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#define PMU_I2C_ADDRESS 0x2D
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#define MAX_I2C_RETRY 3
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/*
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* Routine: pinmux_init
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* Description: Do individual peripheral pinmux configs
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*/
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void pinmux_init(void)
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{
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pinmux_config_table(tegra3_pinmux_common,
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ARRAY_SIZE(tegra3_pinmux_common));
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pinmux_config_table(unused_pins_lowpower,
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ARRAY_SIZE(unused_pins_lowpower));
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/* Initialize any non-default pad configs (APB_MISC_GP regs) */
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padgrp_config_table(cardhu_padctrl, ARRAY_SIZE(cardhu_padctrl));
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}
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#if defined(CONFIG_TEGRA_MMC)
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/*
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* Do I2C/PMU writes to bring up SD card bus power
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*
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*/
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void board_sdmmc_voltage_init(void)
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{
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uchar reg, data_buffer[1];
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int i;
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i2c_set_bus_num(0); /* PMU is on bus 0 */
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/* TPS659110: LDO5_REG = 3.3v, ACTIVE to SDMMC1 */
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data_buffer[0] = 0x65;
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reg = 0x32;
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for (i = 0; i < MAX_I2C_RETRY; ++i) {
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if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
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udelay(100);
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}
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/* TPS659110: GPIO7_REG = PDEN, output a 1 to EN_3V3_SYS */
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data_buffer[0] = 0x09;
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reg = 0x67;
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for (i = 0; i < MAX_I2C_RETRY; ++i) {
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if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
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udelay(100);
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}
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}
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/*
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* Routine: pin_mux_mmc
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* Description: setup the MMC muxes, power rails, etc.
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*/
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void pin_mux_mmc(void)
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{
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/*
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* NOTE: We don't do mmc-specific pin muxes here.
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* They were done globally in pinmux_init().
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*/
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/* Bring up the SDIO1 power rail */
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board_sdmmc_voltage_init();
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}
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#endif /* MMC */
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