/* * 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; /* INT_MAX will set each LED to its maximum brightness */ led_trigger_event(ledtrig_ide, INT_MAX); 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");