arch/arm/mach-omap1/leds-innovator.c

   1 /*
   2  * linux/arch/arm/mach-omap1/leds-innovator.c
   3  */
   4 #include <linux/init.h>
   5
   6 #include <asm/hardware.h>
   7 #include <asm/leds.h>
   8 #include <asm/system.h>
   9
  10 #include "leds.h"
  11
  12
  13 #define LED_STATE_ENABLED       1
  14 #define LED_STATE_CLAIMED       2
  15
  16 static unsigned int led_state;
  17 static unsigned int hw_led_state;
  18
  19 void innovator_leds_event(led_event_t evt)
  20 {
  21         unsigned long flags;
  22
  23         local_irq_save(flags);
  24
  25         switch (evt) {
  26         case led_start:
  27                 hw_led_state = 0;
  28                 led_state = LED_STATE_ENABLED;
  29                 break;
  30
  31         case led_stop:
  32                 led_state &= ~LED_STATE_ENABLED;
  33                 hw_led_state = 0;
  34                 break;
  35
  36         case led_claim:
  37                 led_state |= LED_STATE_CLAIMED;
  38                 hw_led_state = 0;
  39                 break;
  40
  41         case led_release:
  42                 led_state &= ~LED_STATE_CLAIMED;
  43                 hw_led_state = 0;
  44                 break;
  45
  46 #ifdef CONFIG_LEDS_TIMER
  47         case led_timer:
  48                 if (!(led_state & LED_STATE_CLAIMED))
  49                         hw_led_state ^= 0;
  50                 break;
  51 #endif
  52
  53 #ifdef CONFIG_LEDS_CPU
  54         case led_idle_start:
  55                 if (!(led_state & LED_STATE_CLAIMED))
  56                         hw_led_state |= 0;
  57                 break;
  58
  59         case led_idle_end:
  60                 if (!(led_state & LED_STATE_CLAIMED))
  61                         hw_led_state &= ~0;
  62                 break;
  63 #endif
  64
  65         case led_halted:
  66                 break;
  67
  68         case led_green_on:
  69                 if (led_state & LED_STATE_CLAIMED)
  70                         hw_led_state &= ~0;
  71                 break;
  72
  73         case led_green_off:
  74                 if (led_state & LED_STATE_CLAIMED)
  75                         hw_led_state |= 0;
  76                 break;
  77
  78         case led_amber_on:
  79                 break;
  80
  81         case led_amber_off:
  82                 break;
  83
  84         case led_red_on:
  85                 if (led_state & LED_STATE_CLAIMED)
  86                         hw_led_state &= ~0;
  87                 break;
  88
  89         case led_red_off:
  90                 if (led_state & LED_STATE_CLAIMED)
  91                         hw_led_state |= 0;
  92                 break;
  93
  94         default:
  95                 break;
  96         }
  97
  98         if (led_state & LED_STATE_ENABLED)
  99                 ;
 100
 101         local_irq_restore(flags);
 102 }