| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2010 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 |
| */ |
| |
| #ifndef CPU_SAMSUNG_EXYNOS5250_GPIO_H |
| #define CPU_SAMSUNG_EXYNOS5250_GPIO_H |
| |
| #include "cpu.h" |
| |
| struct gpio_bank { |
| unsigned int con; |
| unsigned int dat; |
| unsigned int pull; |
| unsigned int drv; |
| unsigned int pdn_con; |
| unsigned int pdn_pull; |
| unsigned char res1[8]; |
| }; |
| |
| /* GPIO pins per bank */ |
| #define GPIO_PER_BANK 8 |
| |
| /* Pin configurations */ |
| #define GPIO_INPUT 0x0 |
| #define GPIO_OUTPUT 0x1 |
| #define GPIO_IRQ 0xf |
| #define GPIO_FUNC(x) (x) |
| |
| /* Pull mode */ |
| #define GPIO_PULL_NONE 0x0 |
| #define GPIO_PULL_DOWN 0x1 |
| #define GPIO_PULL_UP 0x3 |
| |
| /* Drive Strength level */ |
| #define GPIO_DRV_1X 0x0 |
| #define GPIO_DRV_3X 0x1 |
| #define GPIO_DRV_2X 0x2 |
| #define GPIO_DRV_4X 0x3 |
| #define GPIO_DRV_FAST 0x0 |
| #define GPIO_DRV_SLOW 0x1 |
| |
| enum exynos5_gpio_port { |
| EXYNOS5_GPA0 = EXYNOS5_GPIO_PART1_BASE + 0x0000, |
| EXYNOS5_GPA1 = EXYNOS5_GPIO_PART1_BASE + 0x0020, |
| EXYNOS5_GPA2 = EXYNOS5_GPIO_PART1_BASE + 0x0040, |
| |
| EXYNOS5_GPB0 = EXYNOS5_GPIO_PART1_BASE + 0x0060, |
| EXYNOS5_GPB1 = EXYNOS5_GPIO_PART1_BASE + 0x0080, |
| EXYNOS5_GPB2 = EXYNOS5_GPIO_PART1_BASE + 0x00a0, |
| EXYNOS5_GPB3 = EXYNOS5_GPIO_PART1_BASE + 0x00c0, |
| |
| EXYNOS5_GPC0 = EXYNOS5_GPIO_PART1_BASE + 0x00e0, |
| EXYNOS5_GPC1 = EXYNOS5_GPIO_PART1_BASE + 0x0100, |
| EXYNOS5_GPC2 = EXYNOS5_GPIO_PART1_BASE + 0x0120, |
| EXYNOS5_GPC3 = EXYNOS5_GPIO_PART1_BASE + 0x0140, |
| |
| EXYNOS5_GPD0 = EXYNOS5_GPIO_PART1_BASE + 0x0160, |
| EXYNOS5_GPD1 = EXYNOS5_GPIO_PART1_BASE + 0x0180, |
| |
| EXYNOS5_GPY0 = EXYNOS5_GPIO_PART1_BASE + 0x01a0, |
| EXYNOS5_GPY1 = EXYNOS5_GPIO_PART1_BASE + 0x01c0, |
| EXYNOS5_GPY2 = EXYNOS5_GPIO_PART1_BASE + 0x01e0, |
| EXYNOS5_GPY3 = EXYNOS5_GPIO_PART1_BASE + 0x0200, |
| EXYNOS5_GPY4 = EXYNOS5_GPIO_PART1_BASE + 0x0220, |
| EXYNOS5_GPY5 = EXYNOS5_GPIO_PART1_BASE + 0x0240, |
| EXYNOS5_GPY6 = EXYNOS5_GPIO_PART1_BASE + 0x0260, |
| |
| EXYNOS5_GPX0 = EXYNOS5_GPIO_PART2_BASE + 0x0000, |
| EXYNOS5_GPX1 = EXYNOS5_GPIO_PART2_BASE + 0x0020, |
| EXYNOS5_GPX2 = EXYNOS5_GPIO_PART2_BASE + 0x0040, |
| EXYNOS5_GPX3 = EXYNOS5_GPIO_PART2_BASE + 0x0060, |
| |
| EXYNOS5_GPE0 = EXYNOS5_GPIO_PART3_BASE + 0x0000, |
| EXYNOS5_GPE1 = EXYNOS5_GPIO_PART3_BASE + 0x0020, |
| |
| EXYNOS5_GPF0 = EXYNOS5_GPIO_PART3_BASE + 0x0040, |
| EXYNOS5_GPF1 = EXYNOS5_GPIO_PART3_BASE + 0x0060, |
| |
| EXYNOS5_GPG0 = EXYNOS5_GPIO_PART3_BASE + 0x0080, |
| EXYNOS5_GPG1 = EXYNOS5_GPIO_PART3_BASE + 0x00a0, |
| EXYNOS5_GPG2 = EXYNOS5_GPIO_PART3_BASE + 0x00c0, |
| |
| EXYNOS5_GPH0 = EXYNOS5_GPIO_PART3_BASE + 0x00e0, |
| EXYNOS5_GPH1 = EXYNOS5_GPIO_PART3_BASE + 0x0100, |
| |
| EXYNOS5_GPV0 = EXYNOS5_GPIO_PART4_BASE + 0x0000, |
| EXYNOS5_GPV1 = EXYNOS5_GPIO_PART4_BASE + 0x0020, |
| EXYNOS5_GPV2 = EXYNOS5_GPIO_PART4_BASE + 0x0060, |
| EXYNOS5_GPV3 = EXYNOS5_GPIO_PART4_BASE + 0x0080, |
| |
| EXYNOS5_GPV4 = EXYNOS5_GPIO_PART5_BASE + 0x0000, |
| |
| EXYNOS5_GPZ = EXYNOS5_GPIO_PART6_BASE + 0x0000, |
| }; |
| |
| enum { |
| /* GPIO banks are split into this many parts */ |
| EXYNOS_GPIO_NUM_PARTS = 6 |
| }; |
| |
| /* A list of valid GPIO numbers for the asm-generic/gpio.h interface */ |
| enum exynos5_gpio_pin { |
| /* GPIO_PART1_STARTS */ |
| GPIO_A00, |
| GPIO_A01, |
| GPIO_A02, |
| GPIO_A03, |
| GPIO_A04, |
| GPIO_A05, |
| GPIO_A06, |
| GPIO_A07, |
| GPIO_A10, |
| GPIO_A11, |
| GPIO_A12, |
| GPIO_A13, |
| GPIO_A14, |
| GPIO_A15, |
| GPIO_A16, |
| GPIO_A17, |
| GPIO_A20, |
| GPIO_A21, |
| GPIO_A22, |
| GPIO_A23, |
| GPIO_A24, |
| GPIO_A25, |
| GPIO_A26, |
| GPIO_A27, |
| GPIO_B00, /* 0x18 */ |
| GPIO_B01, |
| GPIO_B02, |
| GPIO_B03, |
| GPIO_B04, |
| GPIO_B05, |
| GPIO_B06, |
| GPIO_B07, |
| GPIO_B10, |
| GPIO_B11, |
| GPIO_B12, |
| GPIO_B13, |
| GPIO_B14, |
| GPIO_B15, |
| GPIO_B16, |
| GPIO_B17, |
| GPIO_B20, |
| GPIO_B21, |
| GPIO_B22, |
| GPIO_B23, |
| GPIO_B24, |
| GPIO_B25, |
| GPIO_B26, |
| GPIO_B27, |
| GPIO_B30, |
| GPIO_B31, |
| GPIO_B32, |
| GPIO_B33, |
| GPIO_B34, |
| GPIO_B35, |
| GPIO_B36, |
| GPIO_B37, |
| GPIO_C00, /* 0x38 */ |
| GPIO_C01, |
| GPIO_C02, |
| GPIO_C03, |
| GPIO_C04, |
| GPIO_C05, |
| GPIO_C06, |
| GPIO_C07, |
| GPIO_C10, |
| GPIO_C11, |
| GPIO_C12, |
| GPIO_C13, |
| GPIO_C14, |
| GPIO_C15, |
| GPIO_C16, |
| GPIO_C17, |
| GPIO_C20, |
| GPIO_C21, |
| GPIO_C22, |
| GPIO_C23, |
| GPIO_C24, |
| GPIO_C25, |
| GPIO_C26, |
| GPIO_C27, |
| GPIO_C30, |
| GPIO_C31, |
| GPIO_C32, |
| GPIO_C33, |
| GPIO_C34, |
| GPIO_C35, |
| GPIO_C36, |
| GPIO_C37, |
| GPIO_D00, /* 0x58 */ |
| GPIO_D01, |
| GPIO_D02, |
| GPIO_D03, |
| GPIO_D04, |
| GPIO_D05, |
| GPIO_D06, |
| GPIO_D07, |
| GPIO_D10, |
| GPIO_D11, |
| GPIO_D12, |
| GPIO_D13, |
| GPIO_D14, |
| GPIO_D15, |
| GPIO_D16, |
| GPIO_D17, |
| GPIO_Y00, /* 0x68 */ |
| GPIO_Y01, |
| GPIO_Y02, |
| GPIO_Y03, |
| GPIO_Y04, |
| GPIO_Y05, |
| GPIO_Y06, |
| GPIO_Y07, |
| GPIO_Y10, |
| GPIO_Y11, |
| GPIO_Y12, |
| GPIO_Y13, |
| GPIO_Y14, |
| GPIO_Y15, |
| GPIO_Y16, |
| GPIO_Y17, |
| GPIO_Y20, |
| GPIO_Y21, |
| GPIO_Y22, |
| GPIO_Y23, |
| GPIO_Y24, |
| GPIO_Y25, |
| GPIO_Y26, |
| GPIO_Y27, |
| GPIO_Y30, |
| GPIO_Y31, |
| GPIO_Y32, |
| GPIO_Y33, |
| GPIO_Y34, |
| GPIO_Y35, |
| GPIO_Y36, |
| GPIO_Y37, |
| GPIO_Y40, |
| GPIO_Y41, |
| GPIO_Y42, |
| GPIO_Y43, |
| GPIO_Y44, |
| GPIO_Y45, |
| GPIO_Y46, |
| GPIO_Y47, |
| GPIO_Y50, |
| GPIO_Y51, |
| GPIO_Y52, |
| GPIO_Y53, |
| GPIO_Y54, |
| GPIO_Y55, |
| GPIO_Y56, |
| GPIO_Y57, |
| GPIO_Y60, |
| GPIO_Y61, |
| GPIO_Y62, |
| GPIO_Y63, |
| GPIO_Y64, |
| GPIO_Y65, |
| GPIO_Y66, |
| GPIO_Y67, |
| |
| /* GPIO_PART2_STARTS */ |
| GPIO_MAX_PORT_PART_1, |
| GPIO_X00 = GPIO_MAX_PORT_PART_1, /* 0xa0 */ |
| GPIO_X01, |
| GPIO_X02, |
| GPIO_X03, |
| GPIO_X04, |
| GPIO_X05, |
| GPIO_X06, |
| GPIO_X07, |
| GPIO_X10, |
| GPIO_X11, |
| GPIO_X12, |
| GPIO_X13, |
| GPIO_X14, |
| GPIO_X15, |
| GPIO_X16, |
| GPIO_X17, |
| GPIO_X20, |
| GPIO_X21, |
| GPIO_X22, |
| GPIO_X23, |
| GPIO_X24, |
| GPIO_X25, |
| GPIO_X26, |
| GPIO_X27, |
| GPIO_X30, |
| GPIO_X31, |
| GPIO_X32, |
| GPIO_X33, |
| GPIO_X34, |
| GPIO_X35, |
| GPIO_X36, |
| GPIO_X37, |
| |
| /* GPIO_PART3_STARTS */ |
| GPIO_MAX_PORT_PART_2, |
| GPIO_E00 = GPIO_MAX_PORT_PART_2, /* 0xc0 */ |
| GPIO_E01, |
| GPIO_E02, |
| GPIO_E03, |
| GPIO_E04, |
| GPIO_E05, |
| GPIO_E06, |
| GPIO_E07, |
| GPIO_E10, |
| GPIO_E11, |
| GPIO_E12, |
| GPIO_E13, |
| GPIO_E14, |
| GPIO_E15, |
| GPIO_E16, |
| GPIO_E17, |
| GPIO_F00, /* 0xd0 */ |
| GPIO_F01, |
| GPIO_F02, |
| GPIO_F03, |
| GPIO_F04, |
| GPIO_F05, |
| GPIO_F06, |
| GPIO_F07, |
| GPIO_F10, |
| GPIO_F11, |
| GPIO_F12, |
| GPIO_F13, |
| GPIO_F14, |
| GPIO_F15, |
| GPIO_F16, |
| GPIO_F17, |
| GPIO_G00, |
| GPIO_G01, |
| GPIO_G02, |
| GPIO_G03, |
| GPIO_G04, |
| GPIO_G05, |
| GPIO_G06, |
| GPIO_G07, |
| GPIO_G10, |
| GPIO_G11, |
| GPIO_G12, |
| GPIO_G13, |
| GPIO_G14, |
| GPIO_G15, |
| GPIO_G16, |
| GPIO_G17, |
| GPIO_G20, |
| GPIO_G21, |
| GPIO_G22, |
| GPIO_G23, |
| GPIO_G24, |
| GPIO_G25, |
| GPIO_G26, |
| GPIO_G27, |
| GPIO_H00, |
| GPIO_H01, |
| GPIO_H02, |
| GPIO_H03, |
| GPIO_H04, |
| GPIO_H05, |
| GPIO_H06, |
| GPIO_H07, |
| GPIO_H10, |
| GPIO_H11, |
| GPIO_H12, |
| GPIO_H13, |
| GPIO_H14, |
| GPIO_H15, |
| GPIO_H16, |
| GPIO_H17, |
| |
| /* GPIO_PART4_STARTS */ |
| GPIO_MAX_PORT_PART_3, |
| GPIO_V00 = GPIO_MAX_PORT_PART_3, |
| GPIO_V01, |
| GPIO_V02, |
| GPIO_V03, |
| GPIO_V04, |
| GPIO_V05, |
| GPIO_V06, |
| GPIO_V07, |
| GPIO_V10, |
| GPIO_V11, |
| GPIO_V12, |
| GPIO_V13, |
| GPIO_V14, |
| GPIO_V15, |
| GPIO_V16, |
| GPIO_V17, |
| GPIO_V20, |
| GPIO_V21, |
| GPIO_V22, |
| GPIO_V23, |
| GPIO_V24, |
| GPIO_V25, |
| GPIO_V26, |
| GPIO_V27, |
| GPIO_V30, |
| GPIO_V31, |
| GPIO_V32, |
| GPIO_V33, |
| GPIO_V34, |
| GPIO_V35, |
| GPIO_V36, |
| GPIO_V37, |
| |
| /* GPIO_PART5_STARTS */ |
| GPIO_MAX_PORT_PART_4, |
| GPIO_V40 = GPIO_MAX_PORT_PART_4, |
| GPIO_V41, |
| GPIO_V42, |
| GPIO_V43, |
| GPIO_V44, |
| GPIO_V45, |
| GPIO_V46, |
| GPIO_V47, |
| |
| /* GPIO_PART6_STARTS */ |
| GPIO_MAX_PORT_PART_5, |
| GPIO_Z0 = GPIO_MAX_PORT_PART_5, |
| GPIO_Z1, |
| GPIO_Z2, |
| GPIO_Z3, |
| GPIO_Z4, |
| GPIO_Z5, |
| GPIO_Z6, |
| GPIO_MAX_PORT |
| }; |
| |
| /** |
| * Set GPIO pin configuration. |
| * |
| * @param gpio GPIO pin |
| * @param cfg Either GPIO_INPUT, GPIO_OUTPUT, or GPIO_IRQ |
| */ |
| void gpio_cfg_pin(int gpio, int cfg); |
| |
| /** |
| * Set GPIO pull mode. |
| * |
| * @param gpio GPIO pin |
| * @param mode Either GPIO_PULL_DOWN or GPIO_PULL_UP |
| */ |
| void gpio_set_pull(int gpio, int mode); |
| |
| /** |
| * Set GPIO drive strength level. |
| * |
| * @param gpio GPIO pin |
| * @param mode Either GPIO_DRV_1X, GPIO_DRV_2X, GPIO_DRV_3X, or GPIO_DRV_4X |
| */ |
| void gpio_set_drv(int gpio, int mode); |
| |
| /** |
| * Set GPIO drive rate. |
| * |
| * @param gpio GPIO pin |
| * @param mode Either GPIO_DRV_FAST or GPIO_DRV_SLOW |
| */ |
| void gpio_set_rate(int gpio, int mode); |
| |
| /* |
| * reads only a single GPIO |
| * |
| * @param gpio GPIO to read |
| * @return -1 if the value cannot be determined. Otherwise returns |
| * the corresponding MVL3 enum value. |
| */ |
| int gpio_read_mvl3(unsigned gpio); |
| |
| void gpio_info(void); |
| |
| /* |
| * Generic GPIO API for U-Boot |
| * |
| * GPIOs are numbered from 0 to GPIO_COUNT-1 which value is defined |
| * by the SOC/architecture. |
| * |
| * Each GPIO can be an input or output. If an input then its value can |
| * be read as 0 or 1. If an output then its value can be set to 0 or 1. |
| * If you try to write an input then the value is undefined. If you try |
| * to read an output, barring something very unusual, you will get |
| * back the value of the output that you previously set. |
| * |
| * In some cases the operation may fail, for example if the GPIO number |
| * is out of range, or the GPIO is not available because its pin is |
| * being used by another function. In that case, functions may return |
| * an error value of -1. |
| */ |
| |
| /** |
| * Make a GPIO an input. |
| * |
| * @param gpio GPIO number |
| * @return 0 if ok, -1 on error |
| */ |
| int gpio_direction_input(unsigned gpio); |
| |
| /** |
| * Make a GPIO an output, and set its value. |
| * |
| * @param gpio GPIO number |
| * @param value GPIO value (0 for low or 1 for high) |
| * @return 0 if ok, -1 on error |
| */ |
| int gpio_direction_output(unsigned gpio, int value); |
| |
| /** |
| * Get a GPIO's value. This will work whether the GPIO is an input |
| * or an output. |
| * |
| * @param gpio GPIO number |
| * @return 0 if low, 1 if high, -1 on error |
| */ |
| int gpio_get_value(unsigned gpio); |
| |
| /** |
| * Set an output GPIO's value. The GPIO must already be an output or |
| * this function may have no effect. |
| * |
| * @param gpio GPIO number |
| * @param value GPIO value (0 for low or 1 for high) |
| * @return 0 if ok, -1 on error |
| */ |
| int gpio_set_value(unsigned gpio, int value); |
| |
| /* |
| * Many-value logic (3 states). This can be used for inputs whereby presence |
| * of external pull-up or pull-down resistors can be added to overcome internal |
| * pull-ups/pull-downs and force a single value. |
| * |
| * Thus, external pull resistors can force a 0 or 1 and if the value changes |
| * along with internal pull-up/down enable then the input is floating. |
| * |
| * Vpd | Vpu | MVL |
| * ----------------- |
| * 0 | 0 | 0 |
| * ----------------- |
| * 0 | 1 | Z <-- floating input will follow internal pull up/down |
| * ----------------- |
| * 1 | 1 | 1 |
| */ |
| enum mvl3 { |
| LOGIC_0, |
| LOGIC_1, |
| LOGIC_Z, /* high impedence / tri-stated / floating */ |
| }; |
| |
| #endif /* CPU_SAMSUNG_EXYNOS5250_GPIO_H */ |