arch/arm/cpu/arm920t/ep93xx/led.c

   1 /*
   2  * Copyright (C) 2010, 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <asm/io.h>
   8 #include <asm/arch/ep93xx.h>
   9 #include <config.h>
  10 #include <status_led.h>
  11
  12 static uint8_t saved_state[2] = {CONFIG_LED_STATUS_OFF, CONFIG_LED_STATUS_OFF};
  13 static uint32_t gpio_pin[2] = {1 << CONFIG_LED_STATUS_GREEN,
  14                                1 << CONFIG_LED_STATUS_RED};
  15
  16 static inline void switch_LED_on(uint8_t led)
  17 {
  18         register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
  19
  20         writel(readl(&gpio->pedr) | gpio_pin[led], &gpio->pedr);
  21         saved_state[led] = CONFIG_LED_STATUS_ON;
  22 }
  23
  24 static inline void switch_LED_off(uint8_t led)
  25 {
  26         register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
  27
  28         writel(readl(&gpio->pedr) & ~gpio_pin[led], &gpio->pedr);
  29         saved_state[led] = CONFIG_LED_STATUS_OFF;
  30 }
  31
  32 void red_led_on(void)
  33 {
  34         switch_LED_on(CONFIG_LED_STATUS_RED);
  35 }
  36
  37 void red_led_off(void)
  38 {
  39         switch_LED_off(CONFIG_LED_STATUS_RED);
  40 }
  41
  42 void green_led_on(void)
  43 {
  44         switch_LED_on(CONFIG_LED_STATUS_GREEN);
  45 }
  46
  47 void green_led_off(void)
  48 {
  49         switch_LED_off(CONFIG_LED_STATUS_GREEN);
  50 }
  51
  52 void __led_init(led_id_t mask, int state)
  53 {
  54         __led_set(mask, state);
  55 }
  56
  57 void __led_toggle(led_id_t mask)
  58 {
  59         if (CONFIG_LED_STATUS_RED == mask) {
  60                 if (CONFIG_LED_STATUS_ON == saved_state[CONFIG_LED_STATUS_RED])
  61                         red_led_off();
  62                 else
  63                         red_led_on();
  64         } else if (CONFIG_LED_STATUS_GREEN == mask) {
  65                 if (CONFIG_LED_STATUS_ON ==
  66                     saved_state[CONFIG_LED_STATUS_GREEN])
  67                         green_led_off();
  68                 else
  69                         green_led_on();
  70         }
  71 }
  72
  73 void __led_set(led_id_t mask, int state)
  74 {
  75         if (CONFIG_LED_STATUS_RED == mask) {
  76                 if (CONFIG_LED_STATUS_ON == state)
  77                         red_led_on();
  78                 else
  79                         red_led_off();
  80         } else if (CONFIG_LED_STATUS_GREEN == mask) {
  81                 if (CONFIG_LED_STATUS_ON == state)
  82                         green_led_on();
  83                 else
  84                         green_led_off();
  85         }
  86 }