Commit | Line | Data |
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1da177e4 LT |
1 | /** |
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> | |
3367b994 | 25 | #include <linux/module.h> |
438510f6 | 26 | #include <linux/pm.h> |
1da177e4 LT |
27 | |
28 | ||
29 | struct sys_device; | |
30 | ||
31 | struct sysdev_class { | |
32 | struct list_head drivers; | |
33 | ||
34 | /* Default operations for these types of devices */ | |
35 | int (*shutdown)(struct sys_device *); | |
438510f6 | 36 | int (*suspend)(struct sys_device *, pm_message_t state); |
1da177e4 LT |
37 | int (*resume)(struct sys_device *); |
38 | struct kset kset; | |
39 | }; | |
40 | ||
670dd90d SL |
41 | struct sysdev_class_attribute { |
42 | struct attribute attr; | |
43 | ssize_t (*show)(struct sysdev_class *, char *); | |
44 | ssize_t (*store)(struct sysdev_class *, const char *, size_t); | |
45 | }; | |
46 | ||
47 | #define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \ | |
48 | struct sysdev_class_attribute attr_##_name = { \ | |
49 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
50 | .show = _show, \ | |
51 | .store = _store, \ | |
52 | }; | |
53 | ||
1da177e4 LT |
54 | |
55 | extern int sysdev_class_register(struct sysdev_class *); | |
56 | extern void sysdev_class_unregister(struct sysdev_class *); | |
57 | ||
670dd90d SL |
58 | extern int sysdev_class_create_file(struct sysdev_class *, |
59 | struct sysdev_class_attribute *); | |
60 | extern void sysdev_class_remove_file(struct sysdev_class *, | |
61 | struct sysdev_class_attribute *); | |
1da177e4 LT |
62 | /** |
63 | * Auxillary system device drivers. | |
64 | */ | |
65 | ||
66 | struct sysdev_driver { | |
67 | struct list_head entry; | |
68 | int (*add)(struct sys_device *); | |
69 | int (*remove)(struct sys_device *); | |
70 | int (*shutdown)(struct sys_device *); | |
438510f6 | 71 | int (*suspend)(struct sys_device *, pm_message_t state); |
1da177e4 LT |
72 | int (*resume)(struct sys_device *); |
73 | }; | |
74 | ||
75 | ||
76 | extern int sysdev_driver_register(struct sysdev_class *, struct sysdev_driver *); | |
77 | extern void sysdev_driver_unregister(struct sysdev_class *, struct sysdev_driver *); | |
78 | ||
79 | ||
80 | /** | |
81 | * sys_devices can be simplified a lot from regular devices, because they're | |
82 | * simply not as versatile. | |
83 | */ | |
84 | ||
85 | struct sys_device { | |
86 | u32 id; | |
87 | struct sysdev_class * cls; | |
88 | struct kobject kobj; | |
89 | }; | |
90 | ||
91 | extern int sysdev_register(struct sys_device *); | |
92 | extern void sysdev_unregister(struct sys_device *); | |
93 | ||
94 | ||
95 | struct sysdev_attribute { | |
96 | struct attribute attr; | |
97 | ssize_t (*show)(struct sys_device *, char *); | |
98 | ssize_t (*store)(struct sys_device *, const char *, size_t); | |
99 | }; | |
100 | ||
101 | ||
7583b6e4 OJ |
102 | #define _SYSDEV_ATTR(_name,_mode,_show,_store) \ |
103 | { \ | |
104 | .attr = { .name = __stringify(_name), .mode = _mode, \ | |
105 | .owner = THIS_MODULE }, \ | |
1da177e4 LT |
106 | .show = _show, \ |
107 | .store = _store, \ | |
7583b6e4 OJ |
108 | } |
109 | ||
110 | #define SYSDEV_ATTR(_name,_mode,_show,_store) \ | |
111 | struct sysdev_attribute attr_##_name = _SYSDEV_ATTR(_name,_mode,_show,_store); | |
1da177e4 LT |
112 | |
113 | extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *); | |
114 | extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *); | |
115 | ||
116 | #endif /* _SYSDEV_H_ */ |