diff options
Diffstat (limited to 'src/soc/samsung/exynos5250/pinmux.c')
| -rw-r--r-- | src/soc/samsung/exynos5250/pinmux.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/src/soc/samsung/exynos5250/pinmux.c b/src/soc/samsung/exynos5250/pinmux.c new file mode 100644 index 0000000000..dc9590f20f --- /dev/null +++ b/src/soc/samsung/exynos5250/pinmux.c @@ -0,0 +1,267 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Samsung Electronics + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <assert.h> +#include "gpio.h" +#include "pinmux.h" + +static void exynos_pinmux_uart(int start, int count) +{ + int i; + + for (i = start; i < start + count; i++) { + gpio_set_pull(i, GPIO_PULL_NONE); + gpio_cfg_pin(i, GPIO_FUNC(0x2)); + } +} + +void exynos_pinmux_uart0(void) +{ + exynos_pinmux_uart(GPIO_A00, 4); +} + +void exynos_pinmux_uart1(void) +{ + exynos_pinmux_uart(GPIO_D00, 4); +} + +void exynos_pinmux_uart2(void) +{ + exynos_pinmux_uart(GPIO_A10, 4); +} + +void exynos_pinmux_uart3(void) +{ + exynos_pinmux_uart(GPIO_A14, 2); +} + +static void exynos_pinmux_sdmmc(int start, int start_ext) +{ + int i; + + if (start_ext) { + for (i = 0; i <= 3; i++) { + gpio_cfg_pin(start_ext + i, GPIO_FUNC(0x2)); + gpio_set_pull(start_ext + i, GPIO_PULL_UP); + gpio_set_drv(start_ext + i, GPIO_DRV_4X); + } + } + for (i = 0; i < 2; i++) { + gpio_cfg_pin(start + i, GPIO_FUNC(0x2)); + gpio_set_pull(start + i, GPIO_PULL_NONE); + gpio_set_drv(start + i, GPIO_DRV_4X); + } + for (i = 2; i <= 6; i++) { + gpio_cfg_pin(start + i, GPIO_FUNC(0x2)); + gpio_set_pull(start + i, GPIO_PULL_UP); + gpio_set_drv(start + i, GPIO_DRV_4X); + } +} + +void exynos_pinmux_sdmmc0(void) +{ + exynos_pinmux_sdmmc(GPIO_C00, GPIO_C10); +} + +void exynos_pinmux_sdmmc1(void) +{ + exynos_pinmux_sdmmc(GPIO_C20, 0); +} + +void exynos_pinmux_sdmmc2(void) +{ + exynos_pinmux_sdmmc(GPIO_C30, 0); +} + +void exynos_pinmux_sdmmc3(void) +{ + /* + * TODO: Need to add definitions for GPC4 before + * enabling this. + */ + printk(BIOS_DEBUG, "SDMMC3 not supported yet"); +} + +void exynos_pinmux_sromc(int bank, int sixteen_bit) +{ + int i; + + if (bank > 3) { + printk(BIOS_DEBUG, "Unsupported sromc bank %d.\n", bank); + return; + } + + gpio_cfg_pin(GPIO_Y00 + bank, GPIO_FUNC(2)); + gpio_cfg_pin(GPIO_Y04, GPIO_FUNC(2)); + gpio_cfg_pin(GPIO_Y05, GPIO_FUNC(2)); + + for (i = 2; i < 4; i++) + gpio_cfg_pin(GPIO_Y10 + i, GPIO_FUNC(2)); + + for (i = 0; i < 8; i++) { + gpio_cfg_pin(GPIO_Y30 + i, GPIO_FUNC(2)); + gpio_set_pull(GPIO_Y30 + i, GPIO_PULL_UP); + + gpio_cfg_pin(GPIO_Y50 + i, GPIO_FUNC(2)); + gpio_set_pull(GPIO_Y50 + i, GPIO_PULL_UP); + + if (sixteen_bit) { + gpio_cfg_pin(GPIO_Y60 + i, GPIO_FUNC(2)); + gpio_set_pull(GPIO_Y60 + i, GPIO_PULL_UP); + } + } +} + +static void exynos_pinmux_spi(int start, int cfg) +{ + int i; + + for (i = 0; i < 4; i++) { + gpio_cfg_pin(start + i, GPIO_FUNC(cfg)); + gpio_set_pull(start + i, GPIO_PULL_NONE); + gpio_set_drv(start + i, GPIO_DRV_3X); + } +} + +void exynos_pinmux_spi0(void) +{ + exynos_pinmux_spi(GPIO_A20, 0x2); +} + +void exynos_pinmux_spi1(void) +{ + exynos_pinmux_spi(GPIO_A24, 0x2); +} + +void exynos_pinmux_spi2(void) +{ + exynos_pinmux_spi(GPIO_B11, 0x5); +} + +void exynos_pinmux_spi3(void) +{ + exynos_pinmux_spi(GPIO_E00, 0x2); +} + +void exynos_pinmux_spi4(void) +{ + int i; + + for (i = 0; i < 2; i++) + gpio_cfg_pin(GPIO_F02 + i, GPIO_FUNC(0x4)); + for (i = 2; i < 4; i++) + gpio_cfg_pin(GPIO_E02 + i, GPIO_FUNC(0x4)); +} + +void exynos_pinmux_backlight(void) +{ + gpio_cfg_pin(GPIO_B20, GPIO_OUTPUT); + gpio_set_value(GPIO_B20, 1); +} + +void exynos_pinmux_lcd(void) +{ + gpio_cfg_pin(GPIO_Y25, GPIO_OUTPUT); + gpio_set_value(GPIO_Y25, 1); + gpio_cfg_pin(GPIO_X15, GPIO_OUTPUT); + gpio_set_value(GPIO_X15, 1); + gpio_cfg_pin(GPIO_X30, GPIO_OUTPUT); + gpio_set_value(GPIO_X30, 1); +} + +static void exynos_pinmux_i2c(int start, int func) +{ + gpio_cfg_pin(start, GPIO_FUNC(func)); + gpio_cfg_pin(start + 1, GPIO_FUNC(func)); + gpio_set_pull(start, GPIO_PULL_NONE); + gpio_set_pull(start + 1, GPIO_PULL_NONE); +} + +void exynos_pinmux_i2c0(void) +{ + exynos_pinmux_i2c(GPIO_B30, 0x2); +} + +void exynos_pinmux_i2c1(void) +{ + exynos_pinmux_i2c(GPIO_B32, 0x2); +} + +void exynos_pinmux_i2c2(void) +{ + exynos_pinmux_i2c(GPIO_A06, 0x3); +} + +void exynos_pinmux_i2c3(void) +{ + exynos_pinmux_i2c(GPIO_A12, 0x3); +} + +void exynos_pinmux_i2c4(void) +{ + exynos_pinmux_i2c(GPIO_A20, 0x3); +} + +void exynos_pinmux_i2c5(void) +{ + exynos_pinmux_i2c(GPIO_A22, 0x3); +} + +void exynos_pinmux_i2c6(void) +{ + exynos_pinmux_i2c(GPIO_B13, 0x4); +} + +void exynos_pinmux_i2c7(void) +{ + exynos_pinmux_i2c(GPIO_B22, 0x3); +} + +void exynos_pinmux_dphpd(void) +{ + /* Set Hotplug detect for DP */ + gpio_cfg_pin(GPIO_X07, GPIO_FUNC(0x3)); + + /* + * Hotplug detect should have an external pullup; disable the + * internal pulldown so they don't fight. + */ + gpio_set_pull(GPIO_X07, GPIO_PULL_NONE); +} + +void exynos_pinmux_i2s0(void) +{ + int i; + + for (i = 0; i < 5; i++) { + gpio_cfg_pin(GPIO_Z0 + i, GPIO_FUNC(0x02)); + gpio_set_pull(GPIO_Z0 + i, GPIO_PULL_NONE); + } +} + +void exynos_pinmux_i2s1(void) +{ + int i; + + for (i = 0; i < 5; i++) { + gpio_cfg_pin(GPIO_B00 + i, GPIO_FUNC(0x02)); + gpio_set_pull(GPIO_B00 + i, GPIO_PULL_NONE); + } +} |