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/gpio.h> 29 #ifdef CONFIG_TEGRA2_MMC 30 #include <mmc.h> 31 #endif 32 #include "../common/board.h" 33 34 /* 35 * Routine: gpio_config_uart 36 * Description: Force GPIO_PI3 low on Seaboard so UART4 works. 37 */ 38 void gpio_config_uart(void) 39 { 40 int gp = GPIO_PI3; 41 struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE; 42 struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)]; 43 u32 val; 44 45 /* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */ 46 val = readl(&bank->gpio_config[GPIO_PORT(gp)]); 47 val |= 1 << GPIO_BIT(gp); 48 writel(val, &bank->gpio_config[GPIO_PORT(gp)]); 49 50 val = readl(&bank->gpio_out[GPIO_PORT(gp)]); 51 val &= ~(1 << GPIO_BIT(gp)); 52 writel(val, &bank->gpio_out[GPIO_PORT(gp)]); 53 54 val = readl(&bank->gpio_dir_out[GPIO_PORT(gp)]); 55 val |= 1 << GPIO_BIT(gp); 56 writel(val, &bank->gpio_dir_out[GPIO_PORT(gp)]); 57 } 58 59 #ifdef CONFIG_TEGRA2_MMC 60 /* 61 * Routine: pin_mux_mmc 62 * Description: setup the pin muxes/tristate values for the SDMMC(s) 63 */ 64 static void pin_mux_mmc(void) 65 { 66 /* SDMMC4: config 3, x8 on 2nd set of pins */ 67 pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4); 68 pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4); 69 pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4); 70 71 pinmux_tristate_disable(PINGRP_ATB); 72 pinmux_tristate_disable(PINGRP_GMA); 73 pinmux_tristate_disable(PINGRP_GME); 74 75 /* SDMMC3: SDIO3_CLK, SDIO3_CMD, SDIO3_DAT[3:0] */ 76 pinmux_set_func(PINGRP_SDB, PMUX_FUNC_SDIO3); 77 pinmux_set_func(PINGRP_SDC, PMUX_FUNC_SDIO3); 78 pinmux_set_func(PINGRP_SDD, PMUX_FUNC_SDIO3); 79 80 pinmux_tristate_disable(PINGRP_SDC); 81 pinmux_tristate_disable(PINGRP_SDD); 82 pinmux_tristate_disable(PINGRP_SDB); 83 84 /* For power GPIO PI6 */ 85 pinmux_tristate_disable(PINGRP_ATA); 86 /* For CD GPIO PI5 */ 87 pinmux_tristate_disable(PINGRP_ATC); 88 } 89 90 /* 91 * Routine: gpio_config_mmc 92 * Description: Set GPIOs for SDMMC3 SDIO slot. 93 */ 94 void gpio_config_mmc(void) 95 { 96 /* Set EN_VDDIO_SD (GPIO I6) */ 97 gpio_direction_output(GPIO_PI6, 1); 98 99 /* Config pin as GPI for Card Detect (GPIO I5) */ 100 gpio_direction_input(GPIO_PI5); 101 } 102 103 /* this is a weak define that we are overriding */ 104 int board_mmc_init(bd_t *bd) 105 { 106 debug("board_mmc_init called\n"); 107 108 /* Enable muxes, etc. for SDMMC controllers */ 109 pin_mux_mmc(); 110 gpio_config_mmc(); 111 112 debug("board_mmc_init: init eMMC\n"); 113 /* init dev 0, eMMC chip, with 4-bit bus */ 114 /* The board has an 8-bit bus, but 8-bit doesn't work yet */ 115 tegra2_mmc_init(0, 4); 116 117 debug("board_mmc_init: init SD slot\n"); 118 /* init dev 1, SD slot, with 4-bit bus */ 119 tegra2_mmc_init(1, 4); 120 121 return 0; 122 } 123 124 /* this is a weak define that we are overriding */ 125 int board_mmc_getcd(u8 *cd, struct mmc *mmc) 126 { 127 debug("board_mmc_getcd called\n"); 128 *cd = 1; /* Assume card is inserted, or eMMC */ 129 130 if (IS_SD(mmc)) { 131 /* Seaboard SDMMC3 = SDIO3_CD = GPIO_PI5 */ 132 if (gpio_get_value(GPIO_PI5)) 133 *cd = 0; 134 } 135 136 return 0; 137 } 138 #endif 139