| Matthias Kaehlcke | 195dbd1 | 2010-02-01 21:29:39 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010, 2009 Matthias Kaehlcke <matthias@kaehlcke.net> |
| 3 | * |
| 4 | * See file CREDITS for list of people who contributed to this |
| 5 | * project. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of |
| 10 | * the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 20 | * MA 02111-1307 USA |
| 21 | */ |
| 22 | |
| 23 | #include <asm/io.h> |
| 24 | #include <asm/arch/ep93xx.h> |
| 25 | #include <config.h> |
| 26 | #include <status_led.h> |
| 27 | |
| 28 | static uint8_t saved_state[2] = {STATUS_LED_OFF, STATUS_LED_OFF}; |
| 29 | static uint32_t gpio_pin[2] = {1 << STATUS_LED_GREEN, |
| 30 | 1 << STATUS_LED_RED}; |
| 31 | |
| 32 | inline void switch_LED_on(uint8_t led) |
| 33 | { |
| 34 | register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE; |
| 35 | |
| 36 | writel(readl(&gpio->pedr) | gpio_pin[led], &gpio->pedr); |
| 37 | saved_state[led] = STATUS_LED_ON; |
| 38 | } |
| 39 | |
| 40 | inline void switch_LED_off(uint8_t led) |
| 41 | { |
| 42 | register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE; |
| 43 | |
| 44 | writel(readl(&gpio->pedr) & ~gpio_pin[led], &gpio->pedr); |
| 45 | saved_state[led] = STATUS_LED_OFF; |
| 46 | } |
| 47 | |
| 48 | void red_LED_on(void) |
| 49 | { |
| 50 | switch_LED_on(STATUS_LED_RED); |
| 51 | } |
| 52 | |
| 53 | void red_LED_off(void) |
| 54 | { |
| 55 | switch_LED_off(STATUS_LED_RED); |
| 56 | } |
| 57 | |
| 58 | void green_LED_on(void) |
| 59 | { |
| 60 | switch_LED_on(STATUS_LED_GREEN); |
| 61 | } |
| 62 | |
| 63 | void green_LED_off(void) |
| 64 | { |
| 65 | switch_LED_off(STATUS_LED_GREEN); |
| 66 | } |
| 67 | |
| 68 | void __led_init(led_id_t mask, int state) |
| 69 | { |
| 70 | __led_set(mask, state); |
| 71 | } |
| 72 | |
| 73 | void __led_toggle(led_id_t mask) |
| 74 | { |
| 75 | if (STATUS_LED_RED == mask) { |
| 76 | if (STATUS_LED_ON == saved_state[STATUS_LED_RED]) |
| 77 | red_LED_off(); |
| 78 | else |
| 79 | red_LED_on(); |
| 80 | } else if (STATUS_LED_GREEN == mask) { |
| 81 | if (STATUS_LED_ON == saved_state[STATUS_LED_GREEN]) |
| 82 | green_LED_off(); |
| 83 | else |
| 84 | green_LED_on(); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | void __led_set(led_id_t mask, int state) |
| 89 | { |
| 90 | if (STATUS_LED_RED == mask) { |
| 91 | if (STATUS_LED_ON == state) |
| 92 | red_LED_on(); |
| 93 | else |
| 94 | red_LED_off(); |
| 95 | } else if (STATUS_LED_GREEN == mask) { |
| 96 | if (STATUS_LED_ON == state) |
| 97 | green_LED_on(); |
| 98 | else |
| 99 | green_LED_off(); |
| 100 | } |
| 101 | } |