| /* |
| * GPIO driver for TI DaVinci DA8xx SOCs. |
| * |
| * (C) Copyright 2011 Guralp Systems Ltd. |
| * Laurence Withers <lwithers@guralp.com> |
| * |
| * 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; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <common.h> |
| #include <asm/io.h> |
| #include <asm/gpio.h> |
| #include <asm/arch/hardware.h> |
| #include <asm/arch/davinci_misc.h> |
| |
| static struct gpio_registry { |
| int is_registered; |
| char name[GPIO_NAME_SIZE]; |
| } gpio_registry[MAX_NUM_GPIOS]; |
| |
| #if defined(CONFIG_SOC_DA8XX) |
| #define pinmux(x) (&davinci_syscfg_regs->pinmux[x]) |
| |
| static const struct pinmux_config gpio_pinmux[] = { |
| { pinmux(1), 8, 7 }, /* GP0[0] */ |
| { pinmux(1), 8, 6 }, |
| { pinmux(1), 8, 5 }, |
| { pinmux(1), 8, 4 }, |
| { pinmux(1), 8, 3 }, |
| { pinmux(1), 8, 2 }, |
| { pinmux(1), 8, 1 }, |
| { pinmux(1), 8, 0 }, |
| { pinmux(0), 8, 7 }, |
| { pinmux(0), 8, 6 }, |
| { pinmux(0), 8, 5 }, |
| { pinmux(0), 8, 4 }, |
| { pinmux(0), 8, 3 }, |
| { pinmux(0), 8, 2 }, |
| { pinmux(0), 8, 1 }, |
| { pinmux(0), 8, 0 }, |
| { pinmux(4), 8, 7 }, /* GP1[0] */ |
| { pinmux(4), 8, 6 }, |
| { pinmux(4), 8, 5 }, |
| { pinmux(4), 8, 4 }, |
| { pinmux(4), 8, 3 }, |
| { pinmux(4), 8, 2 }, |
| { pinmux(4), 4, 1 }, |
| { pinmux(4), 4, 0 }, |
| { pinmux(3), 4, 0 }, |
| { pinmux(2), 4, 6 }, |
| { pinmux(2), 4, 5 }, |
| { pinmux(2), 4, 4 }, |
| { pinmux(2), 4, 3 }, |
| { pinmux(2), 4, 2 }, |
| { pinmux(2), 4, 1 }, |
| { pinmux(2), 8, 0 }, |
| { pinmux(6), 8, 7 }, /* GP2[0] */ |
| { pinmux(6), 8, 6 }, |
| { pinmux(6), 8, 5 }, |
| { pinmux(6), 8, 4 }, |
| { pinmux(6), 8, 3 }, |
| { pinmux(6), 8, 2 }, |
| { pinmux(6), 8, 1 }, |
| { pinmux(6), 8, 0 }, |
| { pinmux(5), 8, 7 }, |
| { pinmux(5), 8, 6 }, |
| { pinmux(5), 8, 5 }, |
| { pinmux(5), 8, 4 }, |
| { pinmux(5), 8, 3 }, |
| { pinmux(5), 8, 2 }, |
| { pinmux(5), 8, 1 }, |
| { pinmux(5), 8, 0 }, |
| { pinmux(8), 8, 7 }, /* GP3[0] */ |
| { pinmux(8), 8, 6 }, |
| { pinmux(8), 8, 5 }, |
| { pinmux(8), 8, 4 }, |
| { pinmux(8), 8, 3 }, |
| { pinmux(8), 8, 2 }, |
| { pinmux(8), 8, 1 }, |
| { pinmux(8), 8, 0 }, |
| { pinmux(7), 8, 7 }, |
| { pinmux(7), 8, 6 }, |
| { pinmux(7), 8, 5 }, |
| { pinmux(7), 8, 4 }, |
| { pinmux(7), 8, 3 }, |
| { pinmux(7), 8, 2 }, |
| { pinmux(7), 8, 1 }, |
| { pinmux(7), 8, 0 }, |
| { pinmux(10), 8, 7 }, /* GP4[0] */ |
| { pinmux(10), 8, 6 }, |
| { pinmux(10), 8, 5 }, |
| { pinmux(10), 8, 4 }, |
| { pinmux(10), 8, 3 }, |
| { pinmux(10), 8, 2 }, |
| { pinmux(10), 8, 1 }, |
| { pinmux(10), 8, 0 }, |
| { pinmux(9), 8, 7 }, |
| { pinmux(9), 8, 6 }, |
| { pinmux(9), 8, 5 }, |
| { pinmux(9), 8, 4 }, |
| { pinmux(9), 8, 3 }, |
| { pinmux(9), 8, 2 }, |
| { pinmux(9), 8, 1 }, |
| { pinmux(9), 8, 0 }, |
| { pinmux(12), 8, 7 }, /* GP5[0] */ |
| { pinmux(12), 8, 6 }, |
| { pinmux(12), 8, 5 }, |
| { pinmux(12), 8, 4 }, |
| { pinmux(12), 8, 3 }, |
| { pinmux(12), 8, 2 }, |
| { pinmux(12), 8, 1 }, |
| { pinmux(12), 8, 0 }, |
| { pinmux(11), 8, 7 }, |
| { pinmux(11), 8, 6 }, |
| { pinmux(11), 8, 5 }, |
| { pinmux(11), 8, 4 }, |
| { pinmux(11), 8, 3 }, |
| { pinmux(11), 8, 2 }, |
| { pinmux(11), 8, 1 }, |
| { pinmux(11), 8, 0 }, |
| { pinmux(19), 8, 6 }, /* GP6[0] */ |
| { pinmux(19), 8, 5 }, |
| { pinmux(19), 8, 4 }, |
| { pinmux(19), 8, 3 }, |
| { pinmux(19), 8, 2 }, |
| { pinmux(16), 8, 1 }, |
| { pinmux(14), 8, 1 }, |
| { pinmux(14), 8, 0 }, |
| { pinmux(13), 8, 7 }, |
| { pinmux(13), 8, 6 }, |
| { pinmux(13), 8, 5 }, |
| { pinmux(13), 8, 4 }, |
| { pinmux(13), 8, 3 }, |
| { pinmux(13), 8, 2 }, |
| { pinmux(13), 8, 1 }, |
| { pinmux(13), 8, 0 }, |
| { pinmux(18), 8, 1 }, /* GP7[0] */ |
| { pinmux(18), 8, 0 }, |
| { pinmux(17), 8, 7 }, |
| { pinmux(17), 8, 6 }, |
| { pinmux(17), 8, 5 }, |
| { pinmux(17), 8, 4 }, |
| { pinmux(17), 8, 3 }, |
| { pinmux(17), 8, 2 }, |
| { pinmux(17), 8, 1 }, |
| { pinmux(17), 8, 0 }, |
| { pinmux(16), 8, 7 }, |
| { pinmux(16), 8, 6 }, |
| { pinmux(16), 8, 5 }, |
| { pinmux(16), 8, 4 }, |
| { pinmux(16), 8, 3 }, |
| { pinmux(16), 8, 2 }, |
| { pinmux(19), 8, 0 }, /* GP8[0] */ |
| { pinmux(3), 4, 7 }, |
| { pinmux(3), 4, 6 }, |
| { pinmux(3), 4, 5 }, |
| { pinmux(3), 4, 4 }, |
| { pinmux(3), 4, 3 }, |
| { pinmux(3), 4, 2 }, |
| { pinmux(2), 4, 7 }, |
| { pinmux(19), 8, 1 }, |
| { pinmux(19), 8, 0 }, |
| { pinmux(18), 8, 7 }, |
| { pinmux(18), 8, 6 }, |
| { pinmux(18), 8, 5 }, |
| { pinmux(18), 8, 4 }, |
| { pinmux(18), 8, 3 }, |
| { pinmux(18), 8, 2 }, |
| }; |
| #else |
| #define davinci_configure_pin_mux(a, b) |
| #endif |
| |
| int gpio_request(unsigned gpio, const char *label) |
| { |
| if (gpio >= MAX_NUM_GPIOS) |
| return -1; |
| |
| if (gpio_registry[gpio].is_registered) |
| return -1; |
| |
| gpio_registry[gpio].is_registered = 1; |
| strncpy(gpio_registry[gpio].name, label, GPIO_NAME_SIZE); |
| gpio_registry[gpio].name[GPIO_NAME_SIZE - 1] = 0; |
| |
| davinci_configure_pin_mux(&gpio_pinmux[gpio], 1); |
| |
| return 0; |
| } |
| |
| int gpio_free(unsigned gpio) |
| { |
| if (gpio >= MAX_NUM_GPIOS) |
| return -1; |
| |
| if (!gpio_registry[gpio].is_registered) |
| return -1; |
| |
| gpio_registry[gpio].is_registered = 0; |
| gpio_registry[gpio].name[0] = '\0'; |
| /* Do not configure as input or change pin mux here */ |
| return 0; |
| } |
| |
| int gpio_direction_input(unsigned gpio) |
| { |
| struct davinci_gpio *bank; |
| |
| bank = GPIO_BANK(gpio); |
| setbits_le32(&bank->dir, 1U << GPIO_BIT(gpio)); |
| return 0; |
| } |
| |
| int gpio_direction_output(unsigned gpio, int value) |
| { |
| struct davinci_gpio *bank; |
| |
| bank = GPIO_BANK(gpio); |
| clrbits_le32(&bank->dir, 1U << GPIO_BIT(gpio)); |
| gpio_set_value(gpio, value); |
| return 0; |
| } |
| |
| int gpio_get_value(unsigned gpio) |
| { |
| struct davinci_gpio *bank; |
| unsigned int ip; |
| |
| bank = GPIO_BANK(gpio); |
| ip = in_le32(&bank->in_data) & (1U << GPIO_BIT(gpio)); |
| return ip ? 1 : 0; |
| } |
| |
| int gpio_set_value(unsigned gpio, int value) |
| { |
| struct davinci_gpio *bank; |
| |
| bank = GPIO_BANK(gpio); |
| |
| if (value) |
| bank->set_data = 1U << GPIO_BIT(gpio); |
| else |
| bank->clr_data = 1U << GPIO_BIT(gpio); |
| |
| return 0; |
| } |
| |
| void gpio_info(void) |
| { |
| unsigned gpio, dir, val; |
| struct davinci_gpio *bank; |
| |
| for (gpio = 0; gpio < MAX_NUM_GPIOS; ++gpio) { |
| bank = GPIO_BANK(gpio); |
| dir = in_le32(&bank->dir) & (1U << GPIO_BIT(gpio)); |
| val = gpio_get_value(gpio); |
| |
| printf("% 4d: %s: %d [%c] %s\n", |
| gpio, dir ? " in" : "out", val, |
| gpio_registry[gpio].is_registered ? 'x' : ' ', |
| gpio_registry[gpio].name); |
| } |
| } |