LXR linux/arch/arm/mach-pxa/leds-idp.c

   1/*
   2 * linux/arch/arm/mach-pxa/leds-idp.c
   3 *
   4 * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
   5 *
   6 * Copyright (c) 2001 Jeff Sutherland <jeffs@accelent.com>
   7 *
   8 * Original (leds-footbridge.c) by Russell King
   9 *
  10 * Macros for actual LED manipulation should be in machine specific
  11 * files in this 'mach' directory.
  12 */
  13
  14
  15#include <linux/init.h>
  16
  17#include <asm/hardware.h>
  18#include <asm/leds.h>
  19#include <asm/system.h>
  20
  21#include <asm/arch/pxa-regs.h>
  22#include <asm/arch/idp.h>
  23
  24#include "leds.h"
  25
  26#define LED_STATE_ENABLED       1
  27#define LED_STATE_CLAIMED       2
  28
  29static unsigned int led_state;
  30static unsigned int hw_led_state;
  31
  32void idp_leds_event(led_event_t evt)
  33{
  34        unsigned long flags;
  35
  36        local_irq_save(flags);
  37
  38        switch (evt) {
  39        case led_start:
  40                hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  41                led_state = LED_STATE_ENABLED;
  42                break;
  43
  44        case led_stop:
  45                led_state &= ~LED_STATE_ENABLED;
  46                break;
  47
  48        case led_claim:
  49                led_state |= LED_STATE_CLAIMED;
  50                hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  51                break;
  52
  53        case led_release:
  54                led_state &= ~LED_STATE_CLAIMED;
  55                hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  56                break;
  57
  58#ifdef CONFIG_LEDS_TIMER
  59        case led_timer:
  60                if (!(led_state & LED_STATE_CLAIMED))
  61                        hw_led_state ^= IDP_HB_LED;
  62                break;
  63#endif
  64
  65#ifdef CONFIG_LEDS_CPU
  66        case led_idle_start:
  67                if (!(led_state & LED_STATE_CLAIMED))
  68                        hw_led_state &= ~IDP_BUSY_LED;
  69                break;
  70
  71        case led_idle_end:
  72                if (!(led_state & LED_STATE_CLAIMED))
  73                        hw_led_state |= IDP_BUSY_LED;
  74                break;
  75#endif
  76
  77        case led_halted:
  78                break;
  79
  80        case led_green_on:
  81                if (led_state & LED_STATE_CLAIMED)
  82                        hw_led_state |= IDP_HB_LED;
  83                break;
  84
  85        case led_green_off:
  86                if (led_state & LED_STATE_CLAIMED)
  87                        hw_led_state &= ~IDP_HB_LED;
  88                break;
  89
  90        case led_amber_on:
  91                break;
  92
  93        case led_amber_off:
  94                break;
  95
  96        case led_red_on:
  97                if (led_state & LED_STATE_CLAIMED)
  98                        hw_led_state |= IDP_BUSY_LED;
  99                break;
 100
 101        case led_red_off:
 102                if (led_state & LED_STATE_CLAIMED)
 103                        hw_led_state &= ~IDP_BUSY_LED;
 104                break;
 105
 106        default:
 107                break;
 108        }
 109
 110        if  (led_state & LED_STATE_ENABLED)
 111                IDP_CPLD_LED_CONTROL = ( (IDP_CPLD_LED_CONTROL | IDP_LEDS_MASK) & ~hw_led_state);
 112        else
 113                IDP_CPLD_LED_CONTROL |= IDP_LEDS_MASK;
 114
 115        local_irq_restore(flags);
 116}
 117