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

   1 /*
   2  *  linux/arch/arm/mach-sa1100/leds-adsbitsy.c
   3  *
   4  * ADS Bitsy LED
   5  * 7/25/01 Woojung Huh
   6  */
   7 #include <linux/config.h>
   8 #include <linux/init.h>
   9
  10 #include <asm/hardware.h>
  11 #include <asm/leds.h>
  12 #include <asm/system.h>
  13
  14 #include "leds.h"
  15
  16
  17 #define LED_STATE_ENABLED       1
  18 #define LED_STATE_CLAIMED       2
  19
  20 static unsigned int led_state;
  21 static unsigned int hw_led_state;
  22
  23 #define LED_TIMER       GPIO_GPIO20  /* green heartbeat */
  24
  25 #define LED_MASK                (LED_TIMER)
  26
  27 void adsbitsy_leds_event(led_event_t evt)
  28 {
  29         unsigned long flags;
  30
  31         local_irq_save(flags);
  32
  33         switch (evt) {
  34         case led_start:
  35                 hw_led_state = 0;        /* gc leds are positive logic */
  36                 led_state = LED_STATE_ENABLED;
  37                 break;
  38
  39         case led_stop:
  40                 led_state &= ~LED_STATE_ENABLED;
  41                 break;
  42
  43         case led_claim:
  44                 led_state |= LED_STATE_CLAIMED;
  45                 hw_led_state = LED_MASK;
  46                 break;
  47
  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_TIMER;
  57                 break;
  58 #endif
  59
  60 #ifdef CONFIG_LEDS_CPU
  61         case led_idle_start:
  62                 break;
  63
  64         case led_idle_end:
  65                 break;
  66 #endif
  67
  68         case led_green_on:
  69                 break;
  70
  71         case led_green_off:
  72                 break;
  73
  74         case led_amber_on:
  75                 break;
  76
  77         case led_amber_off:
  78                 break;
  79
  80         case led_red_on:
  81                 break;
  82
  83         case led_red_off:
  84                 break;
  85
  86         default:
  87                 break;
  88         }
  89
  90         if  (led_state & LED_STATE_ENABLED) {
  91                 GPSR = hw_led_state;
  92                 GPCR = hw_led_state ^ LED_MASK;
  93         }
  94
  95         local_irq_restore(flags);
  96 }