led.c 1.6 KB

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