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/*

 * LED IDE-Disk Activity Trigger

 *

 * Copyright 2006 Openedhand Ltd.

 *

 * Author: Richard Purdie <rpurdie@openedhand.com>

 *

 * 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/module.h>

#include <linux/jiffies.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/timer.h>

#include <linux/leds.h>

static void ledtrig_ide_timerfunc(unsigned long data);

DEFINE_LED_TRIGGER(ledtrig_ide);

static DEFINE_TIMER(ledtrig_ide_timer, ledtrig_ide_timerfunc, 0, 0);

static int ide_activity;

static int ide_lastactivity;

void ledtrig_ide_activity(void)

{

        ide_activity++;

        if (!timer_pending(&ledtrig_ide_timer))

                mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10));

}

EXPORT_SYMBOL(ledtrig_ide_activity);

static void ledtrig_ide_timerfunc(unsigned long data)

{

        if (ide_lastactivity != ide_activity) {

                ide_lastactivity = ide_activity;

                led_trigger_event(ledtrig_ide, LED_FULL);

                mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10));

        } else {

                led_trigger_event(ledtrig_ide, LED_OFF);

        }

}

static int __init ledtrig_ide_init(void)

{

        led_trigger_register_simple("ide-disk", &ledtrig_ide);

        return 0;

}

static void __exit ledtrig_ide_exit(void)

{

        led_trigger_unregister_simple(ledtrig_ide);

}

module_init(ledtrig_ide_init);

module_exit(ledtrig_ide_exit);

MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");

MODULE_DESCRIPTION("LED IDE Disk Activity Trigger");

MODULE_LICENSE("GPL");