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/gpio.h> 28 #ifdef CONFIG_TEGRA2_MMC 29 #include <mmc.h> 30 #endif 31 32 /* 33 * Routine: gpio_config_uart 34 * Description: Force GPIO_PI3 low on Seaboard so UART4 works. 35 */ 36 void gpio_config_uart(void) 37 { 38 int gp = GPIO_PI3; 39 struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE; 40 struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)]; 41 u32 val; 42 43 /* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */ 44 val = readl(&bank->gpio_config[GPIO_PORT(gp)]); 45 val |= 1 << GPIO_BIT(gp); 46 writel(val, &bank->gpio_config[GPIO_PORT(gp)]); 47 48 val = readl(&bank->gpio_out[GPIO_PORT(gp)]); 49 val &= ~(1 << GPIO_BIT(gp)); 50 writel(val, &bank->gpio_out[GPIO_PORT(gp)]); 51 52 val = readl(&bank->gpio_dir_out[GPIO_PORT(gp)]); 53 val |= 1 << GPIO_BIT(gp); 54 writel(val, &bank->gpio_dir_out[GPIO_PORT(gp)]); 55 } 56 57 #ifdef CONFIG_TEGRA2_MMC 58 /* 59 * Routine: gpio_config_mmc 60 * Description: Set GPIOs for SDMMC3 SDIO slot. 61 */ 62 void gpio_config_mmc(void) 63 { 64 /* Set EN_VDDIO_SD (GPIO I6) */ 65 gpio_direction_output(GPIO_PI6, 1); 66 67 /* Config pin as GPI for Card Detect (GPIO I5) */ 68 gpio_direction_input(GPIO_PI5); 69 } 70 71 /* this is a weak define that we are overriding */ 72 int board_mmc_getcd(u8 *cd, struct mmc *mmc) 73 { 74 debug("board_mmc_getcd called\n"); 75 *cd = 1; /* Assume card is inserted, or eMMC */ 76 77 if (IS_SD(mmc)) { 78 /* Seaboard SDMMC3 = SDIO3_CD = GPIO_PI5 */ 79 if (gpio_get_value(GPIO_PI5)) 80 *cd = 0; 81 } 82 83 return 0; 84 } 85 #endif 86