blob: 389ccf858d378013f7cc86f94e51db5df46f9991 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
2 * System devices follow a slightly different driver model.
3 * They don't need to do dynammic driver binding, can't be probed,
4 * and don't reside on any type of peripheral bus.
5 * So, we represent and treat them a little differently.
6 *
7 * We still have a notion of a driver for a system device, because we still
8 * want to perform basic operations on these devices.
9 *
10 * We also support auxillary drivers binding to devices of a certain class.
11 *
12 * This allows configurable drivers to register themselves for devices of
13 * a certain type. And, it allows class definitions to reside in generic
14 * code while arch-specific code can register specific drivers.
15 *
16 * Auxillary drivers registered with a NULL cls are registered as drivers
17 * for all system devices, and get notification calls for each device.
18 */
19
20
21#ifndef _SYSDEV_H_
22#define _SYSDEV_H_
23
24#include <linux/kobject.h>
Pavel Machek438510f2005-04-16 15:25:24 -070025#include <linux/pm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27
28struct sys_device;
29
30struct sysdev_class {
31 struct list_head drivers;
32
33 /* Default operations for these types of devices */
34 int (*shutdown)(struct sys_device *);
Pavel Machek438510f2005-04-16 15:25:24 -070035 int (*suspend)(struct sys_device *, pm_message_t state);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 int (*resume)(struct sys_device *);
37 struct kset kset;
38};
39
Shaohua Li670dd902006-05-08 13:45:57 +080040struct sysdev_class_attribute {
41 struct attribute attr;
42 ssize_t (*show)(struct sysdev_class *, char *);
43 ssize_t (*store)(struct sysdev_class *, const char *, size_t);
44};
45
46#define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
47struct sysdev_class_attribute attr_##_name = { \
48 .attr = {.name = __stringify(_name), .mode = _mode }, \
49 .show = _show, \
50 .store = _store, \
51};
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54extern int sysdev_class_register(struct sysdev_class *);
55extern void sysdev_class_unregister(struct sysdev_class *);
56
Shaohua Li670dd902006-05-08 13:45:57 +080057extern int sysdev_class_create_file(struct sysdev_class *,
58 struct sysdev_class_attribute *);
59extern void sysdev_class_remove_file(struct sysdev_class *,
60 struct sysdev_class_attribute *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061/**
62 * Auxillary system device drivers.
63 */
64
65struct sysdev_driver {
66 struct list_head entry;
67 int (*add)(struct sys_device *);
68 int (*remove)(struct sys_device *);
69 int (*shutdown)(struct sys_device *);
Pavel Machek438510f2005-04-16 15:25:24 -070070 int (*suspend)(struct sys_device *, pm_message_t state);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 int (*resume)(struct sys_device *);
72};
73
74
75extern int sysdev_driver_register(struct sysdev_class *, struct sysdev_driver *);
76extern void sysdev_driver_unregister(struct sysdev_class *, struct sysdev_driver *);
77
78
79/**
80 * sys_devices can be simplified a lot from regular devices, because they're
81 * simply not as versatile.
82 */
83
84struct sys_device {
85 u32 id;
86 struct sysdev_class * cls;
87 struct kobject kobj;
88};
89
90extern int sysdev_register(struct sys_device *);
91extern void sysdev_unregister(struct sys_device *);
92
93
94struct sysdev_attribute {
95 struct attribute attr;
96 ssize_t (*show)(struct sys_device *, char *);
97 ssize_t (*store)(struct sys_device *, const char *, size_t);
98};
99
100
Olof Johansson7583b6e2007-01-28 21:24:57 -0600101#define _SYSDEV_ATTR(_name,_mode,_show,_store) \
102{ \
103 .attr = { .name = __stringify(_name), .mode = _mode, \
104 .owner = THIS_MODULE }, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 .show = _show, \
106 .store = _store, \
Olof Johansson7583b6e2007-01-28 21:24:57 -0600107}
108
109#define SYSDEV_ATTR(_name,_mode,_show,_store) \
110struct sysdev_attribute attr_##_name = _SYSDEV_ATTR(_name,_mode,_show,_store);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
112extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
113extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
114
115#endif /* _SYSDEV_H_ */