kernel/linux/arch/arm/mach-sa1100/leds-cerf.c

   1 /*
   2  * linux/arch/arm/mach-sa1100/leds-cerf.c
   3  *
   4  * Author: ???
   5  */
   6 #include <linux/config.h>
   7 #include <linux/init.h>
   8
   9 #include <asm/hardware.h>
  10 #include <asm/leds.h>
  11 #include <asm/system.h>
  12
  13 #include "leds.h"
  14
  15
  16 #define LED_STATE_ENABLED       1
  17 #define LED_STATE_CLAIMED       2
  18
  19 static unsigned int led_state;
  20 static unsigned int hw_led_state;
  21
  22 #define LED_D0          GPIO_GPIO(0)
  23 #define LED_D1          GPIO_GPIO(1)
  24 #define LED_D2          GPIO_GPIO(2)
  25 #define LED_D3          GPIO_GPIO(3)
  26 #define LED_MASK        (LED_D0|LED_D1|LED_D2|LED_D3)
  27
  28 void cerf_leds_event(led_event_t evt)
  29 {
  30         unsigned long flags;
  31
  32         local_irq_save(flags);
  33
  34         switch (evt) {
  35         case led_start:
  36                 hw_led_state = LED_MASK;
  37                 led_state = LED_STATE_ENABLED;
  38                 break;
  39
  40         case led_stop:
  41                 led_state &= ~LED_STATE_ENABLED;
  42                 break;
  43
  44         case led_claim:
  45                 led_state |= LED_STATE_CLAIMED;
  46                 hw_led_state = LED_MASK;
  47                 break;
  48         case led_release:
  49                 led_state &= ~LED_STATE_CLAIMED;
  50                 hw_led_state = LED_MASK;
  51                 break;
  52
  53 #ifdef CONFIG_LEDS_TIMER
  54         case led_timer:
  55                 if (!(led_state & LED_STATE_CLAIMED))
  56                         hw_led_state ^= LED_D0;
  57                 break;
  58 #endif
  59
  60 #ifdef CONFIG_LEDS_CPU
  61         case led_idle_start:
  62                 if (!(led_state & LED_STATE_CLAIMED))
  63                         hw_led_state &= ~LED_D1;
  64                 break;
  65
  66         case led_idle_end:
  67                 if (!(led_state & LED_STATE_CLAIMED))
  68                         hw_led_state |= LED_D1;
  69                 break;
  70 #endif
  71         case led_green_on:
  72                 if (!(led_state & LED_STATE_CLAIMED))
  73                         hw_led_state &= ~LED_D2;
  74                 break;
  75
  76         case led_green_off:
  77                 if (!(led_state & LED_STATE_CLAIMED))
  78                         hw_led_state |= LED_D2;
  79                 break;
  80
  81         case led_amber_on:
  82                 if (!(led_state & LED_STATE_CLAIMED))
  83                         hw_led_state &= ~LED_D3;
  84                 break;
  85
  86         case led_amber_off:
  87                 if (!(led_state & LED_STATE_CLAIMED))
  88                         hw_led_state |= LED_D3;
  89                 break;
  90
  91         case led_red_on:
  92                 if (!(led_state & LED_STATE_CLAIMED))
  93                         hw_led_state &= ~LED_D1;
  94                 break;
  95
  96         case led_red_off:
  97                 if (!(led_state & LED_STATE_CLAIMED))
  98                         hw_led_state |= LED_D1;
  99                 break;
 100
 101         default:
 102                 break;
 103         }
 104
 105         if  (led_state & LED_STATE_ENABLED) {
 106                 GPSR = hw_led_state;
 107                 GPCR = hw_led_state ^ LED_MASK;
 108         }
 109
 110         local_irq_restore(flags);
 111 }