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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"); |