arch/arm/mach-omap/leds-innovator.c

   1 /*
   2  * linux/arch/arm/mach-omap/leds-innovator.c
   3  */
   4 #include <linux/config.h>
   5 #include <linux/init.h>
   6
   7 #include <asm/hardware.h>
   8 #include <asm/leds.h>
   9 #include <asm/system.h>
  10
  11 #include "leds.h"
  12
  13
  14 #define LED_STATE_ENABLED       1
  15 #define LED_STATE_CLAIMED       2
  16
  17 static unsigned int led_state;
  18 static unsigned int hw_led_state;
  19
  20 void innovator_leds_event(led_event_t evt)
  21 {
  22         unsigned long flags;
  23
  24         local_irq_save(flags);
  25
  26         switch (evt) {
  27         case led_start:
  28                 hw_led_state = 0;
  29                 led_state = LED_STATE_ENABLED;
  30                 break;
  31
  32         case led_stop:
  33                 led_state &= ~LED_STATE_ENABLED;
  34                 hw_led_state = 0;
  35                 break;
  36
  37         case led_claim:
  38                 led_state |= LED_STATE_CLAIMED;
  39                 hw_led_state = 0;
  40                 break;
  41
  42         case led_release:
  43                 led_state &= ~LED_STATE_CLAIMED;
  44                 hw_led_state = 0;
  45                 break;
  46
  47 #ifdef CONFIG_LEDS_TIMER
  48         case led_timer:
  49                 if (!(led_state & LED_STATE_CLAIMED))
  50                         hw_led_state ^= 0;
  51                 break;
  52 #endif
  53
  54 #ifdef CONFIG_LEDS_CPU
  55         case led_idle_start:
  56                 if (!(led_state & LED_STATE_CLAIMED))
  57                         hw_led_state |= 0;
  58                 break;
  59
  60         case led_idle_end:
  61                 if (!(led_state & LED_STATE_CLAIMED))
  62                         hw_led_state &= ~0;
  63                 break;
  64 #endif
  65
  66         case led_halted:
  67                 break;
  68
  69         case led_green_on:
  70                 if (led_state & LED_STATE_CLAIMED)
  71                         hw_led_state &= ~0;
  72                 break;
  73
  74         case led_green_off:
  75                 if (led_state & LED_STATE_CLAIMED)
  76                         hw_led_state |= 0;
  77                 break;
  78
  79         case led_amber_on:
  80                 break;
  81
  82         case led_amber_off:
  83                 break;
  84
  85         case led_red_on:
  86                 if (led_state & LED_STATE_CLAIMED)
  87                         hw_led_state &= ~0;
  88                 break;
  89
  90         case led_red_off:
  91                 if (led_state & LED_STATE_CLAIMED)
  92                         hw_led_state |= 0;
  93                 break;
  94
  95         default:
  96                 break;
  97         }
  98
  99         if (led_state & LED_STATE_ENABLED)
 100                 ;
 101
 102         local_irq_restore(flags);
 103 }