LXR uboot/board/nvidia/seaboard/seaboard.c

   1/*
   2 *  (C) Copyright 2010,2011
   3 *  NVIDIA Corporation <www.nvidia.com>
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <asm/io.h>
  26#include <asm/arch/tegra2.h>
  27#include <asm/arch/clock.h>
  28#include <asm/arch/funcmux.h>
  29#include <asm/arch/pinmux.h>
  30#include <asm/arch/mmc.h>
  31#include <asm/gpio.h>
  32#ifdef CONFIG_TEGRA_MMC
  33#include <mmc.h>
  34#endif
  35
  36/* TODO: Remove this code when the SPI switch is working */
  37#ifndef CONFIG_SPI_UART_SWITCH
  38/*
  39 * Routine: gpio_config_uart_seaboard
  40 * Description: Force GPIO_PI3 low on Seaboard so UART4 works.
  41 */
  42static void gpio_config_uart_seaboard(void)
  43{
  44        /* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
  45        gpio_request(GPIO_PI3, NULL);
  46        gpio_direction_output(GPIO_PI3, 0);
  47}
  48
  49void gpio_config_uart(void)
  50{
  51        if (machine_is_ventana())
  52                return;
  53        gpio_config_uart_seaboard();
  54}
  55#endif
  56
  57#ifdef CONFIG_TEGRA_MMC
  58/*
  59 * Routine: pin_mux_mmc
  60 * Description: setup the pin muxes/tristate values for the SDMMC(s)
  61 */
  62static void pin_mux_mmc(void)
  63{
  64        funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT);
  65        funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_4BIT);
  66
  67        /* For power GPIO PI6 */
  68        pinmux_tristate_disable(PINGRP_ATA);
  69        /* For CD GPIO PI5 */
  70        pinmux_tristate_disable(PINGRP_ATC);
  71}
  72
  73/* this is a weak define that we are overriding */
  74int board_mmc_init(bd_t *bd)
  75{
  76        debug("board_mmc_init called\n");
  77
  78        /* Enable muxes, etc. for SDMMC controllers */
  79        pin_mux_mmc();
  80
  81        debug("board_mmc_init: init eMMC\n");
  82        /* init dev 0, eMMC chip, with 4-bit bus */
  83        /* The board has an 8-bit bus, but 8-bit doesn't work yet */
  84        tegra2_mmc_init(0, 4, -1, -1);
  85
  86        debug("board_mmc_init: init SD slot\n");
  87        /* init dev 1, SD slot, with 4-bit bus */
  88        tegra2_mmc_init(1, 4, GPIO_PI6, GPIO_PI5);
  89
  90        return 0;
  91}
  92#endif
  93
  94void pin_mux_usb(void)
  95{
  96        /* For USB's GPIO PD0. For now, since we have no pinmux in fdt */
  97        pinmux_tristate_disable(PINGRP_SLXK);
  98}
  99