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https://github.com/brain-hackers/u-boot-brain
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![Stephen Warren](/assets/img/avatar_default.png)
Harmony contains an SD slot with all 8 bits routed. This allows plugging in an eMMC-chip-in-SD-form-factor. Seaboard/Springbank/Ventana/AC100 all have an eMMC chip with all 8 bits hooked up. Now that the U-Boot eMMC code fully supports 8-bit operation, initialize those ports as 8-bit instead of 4-bit to improve performance. Whistler was already registering its ports as 8-bit. TrimSlice doesn't have any 8-bit ports. I don't have any Avionic Design boards nor the Colibri board to test with. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
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* (C) Copyright 2010,2011
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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/io.h>
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#include <asm/arch/tegra.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/funcmux.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/pinmux.h>
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#include <asm/arch-tegra/mmc.h>
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#include <asm/gpio.h>
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#ifdef CONFIG_TEGRA_MMC
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#include <mmc.h>
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#endif
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/* TODO: Remove this code when the SPI switch is working */
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#if !defined(CONFIG_SPI_UART_SWITCH) && (CONFIG_MACH_TYPE != MACH_TYPE_VENTANA)
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void gpio_early_init_uart(void)
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{
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/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
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#ifndef CONFIG_SPL_BUILD
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gpio_request(GPIO_PI3, NULL);
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#endif
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gpio_direction_output(GPIO_PI3, 0);
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}
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#endif
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#ifdef CONFIG_TEGRA_MMC
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/*
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* Routine: pin_mux_mmc
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* Description: setup the pin muxes/tristate values for the SDMMC(s)
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*/
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static void pin_mux_mmc(void)
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{
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funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT);
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funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_4BIT);
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/* For power GPIO PI6 */
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pinmux_tristate_disable(PINGRP_ATA);
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/* For CD GPIO PI5 */
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pinmux_tristate_disable(PINGRP_ATC);
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}
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/* this is a weak define that we are overriding */
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int board_mmc_init(bd_t *bd)
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{
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debug("board_mmc_init called\n");
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/* Enable muxes, etc. for SDMMC controllers */
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pin_mux_mmc();
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debug("board_mmc_init: init eMMC\n");
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/* init dev 0, eMMC chip, with 8-bit bus */
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tegra_mmc_init(0, 8, -1, -1);
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debug("board_mmc_init: init SD slot\n");
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/* init dev 1, SD slot, with 4-bit bus */
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tegra_mmc_init(1, 4, GPIO_PI6, GPIO_PI5);
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return 0;
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}
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#endif
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void pin_mux_usb(void)
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{
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/* For USB's GPIO PD0. For now, since we have no pinmux in fdt */
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pinmux_tristate_disable(PINGRP_SLXK);
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}
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