[NET]: Inline net_device_stats
[linux-2.6.git] / include / linux / leds.h
1 /*
2  * Driver model for leds and led triggers
3  *
4  * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
5  * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  *
11  */
12 #ifndef __LINUX_LEDS_H_INCLUDED
13 #define __LINUX_LEDS_H_INCLUDED
14
15 #include <linux/list.h>
16 #include <linux/spinlock.h>
17
18 struct device;
19 struct class_device;
20 /*
21  * LED Core
22  */
23
24 enum led_brightness {
25         LED_OFF         = 0,
26         LED_HALF        = 127,
27         LED_FULL        = 255,
28 };
29
30 struct led_classdev {
31         const char              *name;
32         int                      brightness;
33         int                      flags;
34
35 #define LED_SUSPENDED           (1 << 0)
36
37         /* Set LED brightness level */
38         void            (*brightness_set)(struct led_classdev *led_cdev,
39                                           enum led_brightness brightness);
40
41         struct class_device     *class_dev;
42         struct list_head         node;                  /* LED Device list */
43         char                    *default_trigger;       /* Trigger to use */
44
45 #ifdef CONFIG_LEDS_TRIGGERS
46         /* Protects the trigger data below */
47         rwlock_t                 trigger_lock;
48
49         struct led_trigger      *trigger;
50         struct list_head         trig_list;
51         void                    *trigger_data;
52 #endif
53 };
54
55 extern int led_classdev_register(struct device *parent,
56                                  struct led_classdev *led_cdev);
57 extern void led_classdev_unregister(struct led_classdev *led_cdev);
58 extern void led_classdev_suspend(struct led_classdev *led_cdev);
59 extern void led_classdev_resume(struct led_classdev *led_cdev);
60
61 /*
62  * LED Triggers
63  */
64 #ifdef CONFIG_LEDS_TRIGGERS
65
66 #define TRIG_NAME_MAX 50
67
68 struct led_trigger {
69         /* Trigger Properties */
70         const char       *name;
71         void            (*activate)(struct led_classdev *led_cdev);
72         void            (*deactivate)(struct led_classdev *led_cdev);
73
74         /* LEDs under control by this trigger (for simple triggers) */
75         rwlock_t          leddev_list_lock;
76         struct list_head  led_cdevs;
77
78         /* Link to next registered trigger */
79         struct list_head  next_trig;
80 };
81
82 /* Registration functions for complex triggers */
83 extern int led_trigger_register(struct led_trigger *trigger);
84 extern void led_trigger_unregister(struct led_trigger *trigger);
85
86 /* Registration functions for simple triggers */
87 #define DEFINE_LED_TRIGGER(x)           static struct led_trigger *x;
88 #define DEFINE_LED_TRIGGER_GLOBAL(x)    struct led_trigger *x;
89 extern void led_trigger_register_simple(const char *name,
90                                 struct led_trigger **trigger);
91 extern void led_trigger_unregister_simple(struct led_trigger *trigger);
92 extern void led_trigger_event(struct led_trigger *trigger,
93                                 enum led_brightness event);
94
95 #else
96
97 /* Triggers aren't active - null macros */
98 #define DEFINE_LED_TRIGGER(x)
99 #define DEFINE_LED_TRIGGER_GLOBAL(x)
100 #define led_trigger_register_simple(x, y) do {} while(0)
101 #define led_trigger_unregister_simple(x) do {} while(0)
102 #define led_trigger_event(x, y) do {} while(0)
103
104 #endif
105
106 /* Trigger specific functions */
107 #ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
108 extern void ledtrig_ide_activity(void);
109 #else
110 #define ledtrig_ide_activity() do {} while(0)
111 #endif
112
113 #endif          /* __LINUX_LEDS_H_INCLUDED */