projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2bfb646c RP |
1 | /* |
| 2 | * LED IDE-Disk Activity Trigger | |
| 3 | * | |
| 4 | * Copyright 2006 Openedhand Ltd. | |
| 5 | * | |
| 6 | * Author: Richard Purdie <rpurdie@openedhand.com> | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | * | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/module.h> | |
| 15 | #include <linux/kernel.h> | |
| 16 | #include <linux/init.h> | |
| 17 | #include <linux/timer.h> | |
| 18 | #include <linux/leds.h> | |
| 19 | ||
| 20 | static void ledtrig_ide_timerfunc(unsigned long data); | |
| 21 | ||
| 22 | DEFINE_LED_TRIGGER(ledtrig_ide); | |
| 23 | static DEFINE_TIMER(ledtrig_ide_timer, ledtrig_ide_timerfunc, 0, 0); | |
| 24 | static int ide_activity; | |
| 25 | static int ide_lastactivity; | |
| 26 | ||
| 27 | void ledtrig_ide_activity(void) | |
| 28 | { | |
| 29 | ide_activity++; | |
| 30 | if (!timer_pending(&ledtrig_ide_timer)) | |
| 31 | mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10)); | |
| 32 | } | |
| 33 | EXPORT_SYMBOL(ledtrig_ide_activity); | |
| 34 | ||
| 35 | static void ledtrig_ide_timerfunc(unsigned long data) | |
| 36 | { | |
| 37 | if (ide_lastactivity != ide_activity) { | |
| 38 | ide_lastactivity = ide_activity; | |
| 39 | led_trigger_event(ledtrig_ide, LED_FULL); | |
| 40 | mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10)); | |
| 41 | } else { | |
| 42 | led_trigger_event(ledtrig_ide, LED_OFF); | |
| 43 | } | |
| 44 | } | |
| 45 | ||
| 46 | static int __init ledtrig_ide_init(void) | |
| 47 | { | |
| 48 | led_trigger_register_simple("ide-disk", &ledtrig_ide); | |
| 49 | return 0; | |
| 50 | } | |
| 51 | ||
| 52 | static void __exit ledtrig_ide_exit(void) | |
| 53 | { | |
| 54 | led_trigger_unregister_simple(ledtrig_ide); | |
| 55 | } | |
| 56 | ||
| 57 | module_init(ledtrig_ide_init); | |
| 58 | module_exit(ledtrig_ide_exit); | |
| 59 | ||
| 60 | MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>"); | |
| 61 | MODULE_DESCRIPTION("LED IDE Disk Activity Trigger"); | |
| 62 | MODULE_LICENSE("GPL"); |