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/pinmux.h>
  28 #include <asm/arch/mmc.h>
  29 #include <asm/gpio.h>
  30 #ifdef CONFIG_TEGRA2_MMC
  31 #include <mmc.h>
  32 #endif
  33
  34 /* TODO: Remove this code when the SPI switch is working */
  35 #ifndef CONFIG_SPI_UART_SWITCH
  36 /*
  37  * Routine: gpio_config_uart_seaboard
  38  * Description: Force GPIO_PI3 low on Seaboard so UART4 works.
  39  */
  40 static void gpio_config_uart_seaboard(void)
  41 {
  42         /* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
  43         gpio_request(GPIO_PI3, NULL);
  44         gpio_direction_output(GPIO_PI3, 0);
  45 }
  46
  47 void gpio_config_uart(void)
  48 {
  49         if (machine_is_ventana())
  50                 return;
  51         gpio_config_uart_seaboard();
  52 }
  53 #endif
  54
  55 #ifdef CONFIG_TEGRA2_MMC
  56 /*
  57  * Routine: pin_mux_mmc
  58  * Description: setup the pin muxes/tristate values for the SDMMC(s)
  59  */
  60 static void pin_mux_mmc(void)
  61 {
  62         /* SDMMC4: config 3, x8 on 2nd set of pins */
  63         pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
  64         pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
  65         pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
  66
  67         pinmux_tristate_disable(PINGRP_ATB);
  68         pinmux_tristate_disable(PINGRP_GMA);
  69         pinmux_tristate_disable(PINGRP_GME);
  70
  71         /* SDMMC3: SDIO3_CLK, SDIO3_CMD, SDIO3_DAT[3:0] */
  72         pinmux_set_func(PINGRP_SDB, PMUX_FUNC_SDIO3);
  73         pinmux_set_func(PINGRP_SDC, PMUX_FUNC_SDIO3);
  74         pinmux_set_func(PINGRP_SDD, PMUX_FUNC_SDIO3);
  75
  76         pinmux_tristate_disable(PINGRP_SDC);
  77         pinmux_tristate_disable(PINGRP_SDD);
  78         pinmux_tristate_disable(PINGRP_SDB);
  79
  80         /* For power GPIO PI6 */
  81         pinmux_tristate_disable(PINGRP_ATA);
  82         /* For CD GPIO PI5 */
  83         pinmux_tristate_disable(PINGRP_ATC);
  84 }
  85
  86 /* this is a weak define that we are overriding */
  87 int board_mmc_init(bd_t *bd)
  88 {
  89         debug("board_mmc_init called\n");
  90
  91         /* Enable muxes, etc. for SDMMC controllers */
  92         pin_mux_mmc();
  93
  94         debug("board_mmc_init: init eMMC\n");
  95         /* init dev 0, eMMC chip, with 4-bit bus */
  96         /* The board has an 8-bit bus, but 8-bit doesn't work yet */
  97         tegra2_mmc_init(0, 4, -1, -1);
  98
  99         debug("board_mmc_init: init SD slot\n");
 100         /* init dev 1, SD slot, with 4-bit bus */
 101         tegra2_mmc_init(1, 4, GPIO_PI6, GPIO_PI5);
 102
 103         return 0;
 104 }
 105 #endif