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 106