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leds-cerf.c
资源名称：SBC-2410X_kernel.tar.gz　[点击查看]
上传用户：lgb322
上传日期：2013-02-24
资源大小：30529k
文件大小：3k
源码类别：

嵌入式Linux

开发平台：

Unix_Linux

leds-cerf.c：源码内容
  1. /*
  2.  * linux/arch/arm/mach-sa1100/leds-cerf.c
  3.  *
  4.  * Author: ???
  5.  */
  6. #include <linux/config.h>
  7. #include <linux/init.h>
  9. #include <asm/hardware.h>
  10. #include <asm/leds.h>
  11. #include <asm/system.h>
  13. #include "leds.h"
  16. #define LED_STATE_ENABLED 1
  17. #define LED_STATE_CLAIMED 2
  19. static unsigned int led_state;
  20. static unsigned int hw_led_state;
  22. #ifdef CONFIG_SA1100_CERF_CPLD
  24. #define LED_D0 GPIO_GPIO(0)
  25. #define LED_D1 GPIO_GPIO(0)
  26. #define LED_D2 GPIO_GPIO(0)
  27. #define LED_D3 GPIO_GPIO(0)
  28. #define LED_MASK (LED_D0|LED_D1|LED_D2|LED_D3)
  30. #else
  32. #define LED_D0          GPIO_GPIO(0)
  33. #define LED_D1          GPIO_GPIO(1)
  34. #define LED_D2          GPIO_GPIO(2)
  35. #define LED_D3          GPIO_GPIO(3)
  36. #define LED_MASK        (LED_D0|LED_D1|LED_D2|LED_D3)
  38. #endif
  40. void cerf_leds_event(led_event_t evt)
  41. {
  42.         unsigned long flags;
  44. local_irq_save(flags);
  46.         switch (evt) {
  47.         case led_start:
  48.                 hw_led_state = LED_MASK;
  49.                 led_state = LED_STATE_ENABLED;
  50.                 break;
  52.         case led_stop:
  53.                 led_state &= ~LED_STATE_ENABLED;
  54.                 break;
  56.         case led_claim:
  57.                 led_state |= LED_STATE_CLAIMED;
  58.                 hw_led_state = LED_MASK;
  59.                 break;
  60.         case led_release:
  61.                 led_state &= ~LED_STATE_CLAIMED;
  62.                 hw_led_state = LED_MASK;
  63.                 break;
  65. #ifdef CONFIG_LEDS_TIMER
  66.         case led_timer:
  67.                 if (!(led_state & LED_STATE_CLAIMED))
  68.                         hw_led_state ^= LED_D0;
  69.                 break;
  70. #endif
  72. #ifdef CONFIG_LEDS_CPU
  73.         case led_idle_start:
  74.                 if (!(led_state & LED_STATE_CLAIMED))
  75.                         hw_led_state &= ~LED_D1;
  76.                 break;
  78.         case led_idle_end:
  79.                 if (!(led_state & LED_STATE_CLAIMED))
  80.                         hw_led_state |= LED_D1;
  81.                 break;
  82. #endif
  83.         case led_green_on:
  84.                 if (!(led_state & LED_STATE_CLAIMED))
  85.                         hw_led_state &= ~LED_D2;
  86.                 break;
  88.         case led_green_off:
  89.                 if (!(led_state & LED_STATE_CLAIMED))
  90.                         hw_led_state |= LED_D2;
  91.                 break;
  93.         case led_amber_on:
  94.                 if (!(led_state & LED_STATE_CLAIMED))
  95.                         hw_led_state &= ~LED_D3;
  96.                 break;
  98.         case led_amber_off:
  99.                 if (!(led_state & LED_STATE_CLAIMED))
  100.                         hw_led_state |= LED_D3;
  101.                 break;
  103.         case led_red_on:
  104.                 if (!(led_state & LED_STATE_CLAIMED))
  105.                         hw_led_state &= ~LED_D1;
  106.                 break;
  108.         case led_red_off:
  109.                 if (!(led_state & LED_STATE_CLAIMED))
  110.                         hw_led_state |= LED_D1;
  111.                 break;
  113.         default:
  114.                 break;
  115.         }
  117.         if  (led_state & LED_STATE_ENABLED) {
  118.                 GPSR = hw_led_state;
  119.                 GPCR = hw_led_state ^ LED_MASK;
  120.         }
  122. local_irq_restore(flags);
  123. }