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

   1 /*
   2  *  linux/arch/arm/mach-sa1100/leds-graphicsclient.c
   3  *
   4  * GraphicsClient Plus LEDs support
   5  * Woojung Huh, Feb 13, 2001
   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       ADS_LED0  /* green heartbeat */
  24 #define LED_USER        ADS_LED1  /* amber, boots to on */
  25 #define LED_IDLE        ADS_LED2  /* red has the idle led, if any */
  26
  27 #define LED_MASK        (ADS_LED0|ADS_LED1|ADS_LED2)
  28
  29 void graphicsclient_leds_event(led_event_t evt)
  30 {
  31         unsigned long flags;
  32
  33         local_irq_save(flags);
  34
  35         switch (evt) {
  36         case led_start:
  37                 hw_led_state = 0;        /* gc leds are positive logic */
  38                 led_state = LED_STATE_ENABLED;
  39                 break;
  40
  41         case led_stop:
  42                 led_state &= ~LED_STATE_ENABLED;
  43                 break;
  44
  45         case led_claim:
  46                 led_state |= LED_STATE_CLAIMED;
  47                 hw_led_state = LED_MASK;
  48                 break;
  49
  50         case led_release:
  51                 led_state &= ~LED_STATE_CLAIMED;
  52                 hw_led_state = LED_MASK;
  53                 break;
  54
  55 #ifdef CONFIG_LEDS_TIMER
  56         case led_timer:
  57                 if (!(led_state & LED_STATE_CLAIMED))
  58                         hw_led_state ^= LED_TIMER;
  59                 break;
  60 #endif
  61
  62 #ifdef CONFIG_LEDS_CPU
  63         case led_idle_start:
  64                 if (!(led_state & LED_STATE_CLAIMED))
  65                         hw_led_state &= ~LED_IDLE;
  66                 break;
  67
  68         case led_idle_end:
  69                 if (!(led_state & LED_STATE_CLAIMED))
  70                         hw_led_state |= LED_IDLE;
  71                 break;
  72 #endif
  73
  74         case led_green_on:
  75                 break;
  76
  77         case led_green_off:
  78                 break;
  79
  80         case led_amber_on:
  81                 hw_led_state |= LED_USER;
  82                 break;
  83
  84         case led_amber_off:
  85                 hw_led_state &= ~LED_USER;
  86                 break;
  87
  88         case led_red_on:
  89                 break;
  90
  91         case led_red_off:
  92                 break;
  93
  94         default:
  95                 break;
  96         }
  97
  98         if  (led_state & LED_STATE_ENABLED) {
  99                 GPSR = hw_led_state;
 100                 GPCR = hw_led_state ^ LED_MASK;
 101         }
 102
 103         local_irq_restore(flags);
 104 }