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leds-trizeps4.c

/*
 * linux/arch/arm/mach-pxa/leds-trizeps4.c
 *
 *  Author: Jürgen Schindele
 *  Created:      20 02, 2006
 *  Copyright:    Jürgen Schindele
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/config.h>
#include <linux/init.h>

#include <asm/hardware.h>
#include <asm/system.h>
#include <asm/types.h>
#include <asm/leds.h>

#include <asm/arch/pxa-regs.h>
#include <asm/arch/trizeps4.h>

#include "leds.h"

#define LED_STATE_ENABLED     1
#define LED_STATE_CLAIMED     2

#define SYS_BUSY        0x01
#define HEARTBEAT       0x02
#define BLINK                 0x04

static unsigned int led_state;
static unsigned int hw_led_state;

void trizeps4_leds_event(led_event_t evt)
{
      unsigned long flags;

      local_irq_save(flags);

      switch (evt) {
      case led_start:
            hw_led_state = 0;
            pxa_gpio_mode( GPIO_SYS_BUSY_LED  | GPIO_OUT);        /* LED1 */
            pxa_gpio_mode( GPIO_HEARTBEAT_LED | GPIO_OUT);        /* LED2 */
            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 ^= HEARTBEAT;
            break;
#endif

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

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

      case led_halted:
            break;

      case led_green_on:
            hw_led_state |= BLINK;
            break;

      case led_green_off:
            hw_led_state &= ~BLINK;
            break;

      case led_amber_on:
            break;

      case led_amber_off:
            break;

      case led_red_on:
            break;

      case led_red_off:
            break;

      default:
            break;
      }

      if  (led_state & LED_STATE_ENABLED) {
            switch (hw_led_state) {
                  case 0:
                        GPSR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
                        GPSR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
                        break;
                  case 1:
                        GPCR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
                        GPSR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
                        break;
                  case 2:
                        GPSR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
                        GPCR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
                        break;
                  case 3:
                        GPCR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
                        GPCR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
                        break;
            }
      }
      else {
            /* turn all off */
            GPSR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
            GPSR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
      }

      local_irq_restore(flags);
}

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