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 } 102