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leds-lubbock.c

/*
 * linux/arch/arm/mach-pxa/leds-lubbock.c
 *
 * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
 *
 * Copyright (c) 2001 Jeff Sutherland <jeffs@accelent.com>
 *
 * Original (leds-footbridge.c) by Russell King
 *
 * Major surgery on April 2004 by Nicolas Pitre for less global
 * namespace collision.  Mostly adapted the Mainstone version.
 */

#include <linux/init.h>

#include <mach/hardware.h>
#include <asm/leds.h>
#include <asm/system.h>
#include <mach/pxa-regs.h>
#include <mach/lubbock.h>

#include "leds.h"

/*
 * 8 discrete leds available for general use:
 *
 * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
 * so be sure to not monkey with them here.
 */

#define D28             (1 << 0)
#define D27             (1 << 1)
#define D26             (1 << 2)
#define D25             (1 << 3)
#define D24             (1 << 4)
#define D23             (1 << 5)
#define D22             (1 << 6)
#define D21             (1 << 7)

#define LED_STATE_ENABLED     1
#define LED_STATE_CLAIMED     2

static unsigned int led_state;
static unsigned int hw_led_state;

void lubbock_leds_event(led_event_t evt)
{
      unsigned long flags;

      local_irq_save(flags);

      switch (evt) {
      case led_start:
            hw_led_state = 0;
            led_state = LED_STATE_ENABLED;
            break;

      case led_stop:
            led_state &= ~LED_STATE_ENABLED;
            break;

      case led_claim:
            led_state |= LED_STATE_CLAIMED;
            hw_led_state = 0;
            break;

      case led_release:
            led_state &= ~LED_STATE_CLAIMED;
            hw_led_state = 0;
            break;

#ifdef CONFIG_LEDS_TIMER
      case led_timer:
            hw_led_state ^= D26;
            break;
#endif

#ifdef CONFIG_LEDS_CPU
      case led_idle_start:
            hw_led_state &= ~D27;
            break;

      case led_idle_end:
            hw_led_state |= D27;
            break;
#endif

      case led_halted:
            break;

      case led_green_on:
            hw_led_state |= D21;
            break;

      case led_green_off:
            hw_led_state &= ~D21;
            break;

      case led_amber_on:
            hw_led_state |= D22;
            break;

      case led_amber_off:
            hw_led_state &= ~D22;
            break;

      case led_red_on:
            hw_led_state |= D23;
            break;

      case led_red_off:
            hw_led_state &= ~D23;
            break;

      default:
            break;
      }

      if  (led_state & LED_STATE_ENABLED)
            LUB_DISC_BLNK_LED = (LUB_DISC_BLNK_LED | 0xff) & ~hw_led_state;
      else
            LUB_DISC_BLNK_LED |= 0xff;

      local_irq_restore(flags);
}

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