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 { | |
af5ca3f4 | 32 | const char *name; |
1da177e4 LT |
33 | struct list_head drivers; |
34 | ||
35 | /* Default operations for these types of devices */ | |
36 | int (*shutdown)(struct sys_device *); | |
438510f6 | 37 | int (*suspend)(struct sys_device *, pm_message_t state); |
1da177e4 LT |
38 | int (*resume)(struct sys_device *); |
39 | struct kset kset; | |
40 | }; | |
41 | ||
670dd90d SL |
42 | struct sysdev_class_attribute { |
43 | struct attribute attr; | |
c9be0a36 AK |
44 | ssize_t (*show)(struct sysdev_class *, struct sysdev_class_attribute *, |
45 | char *); | |
46 | ssize_t (*store)(struct sysdev_class *, struct sysdev_class_attribute *, | |
47 | const char *, size_t); | |
670dd90d SL |
48 | }; |
49 | ||
9d1fe323 MT |
50 | #define _SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \ |
51 | { \ | |
670dd90d SL |
52 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
53 | .show = _show, \ | |
54 | .store = _store, \ | |
9d1fe323 MT |
55 | } |
56 | ||
57 | #define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \ | |
58 | struct sysdev_class_attribute attr_##_name = \ | |
59 | _SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) | |
670dd90d | 60 | |
1da177e4 LT |
61 | |
62 | extern int sysdev_class_register(struct sysdev_class *); | |
63 | extern void sysdev_class_unregister(struct sysdev_class *); | |
64 | ||
670dd90d SL |
65 | extern int sysdev_class_create_file(struct sysdev_class *, |
66 | struct sysdev_class_attribute *); | |
67 | extern void sysdev_class_remove_file(struct sysdev_class *, | |
68 | struct sysdev_class_attribute *); | |
1da177e4 LT |
69 | /** |
70 | * Auxillary system device drivers. | |
71 | */ | |
72 | ||
73 | struct sysdev_driver { | |
74 | struct list_head entry; | |
75 | int (*add)(struct sys_device *); | |
76 | int (*remove)(struct sys_device *); | |
77 | int (*shutdown)(struct sys_device *); | |
438510f6 | 78 | int (*suspend)(struct sys_device *, pm_message_t state); |
1da177e4 LT |
79 | int (*resume)(struct sys_device *); |
80 | }; | |
81 | ||
82 | ||
83 | extern int sysdev_driver_register(struct sysdev_class *, struct sysdev_driver *); | |
84 | extern void sysdev_driver_unregister(struct sysdev_class *, struct sysdev_driver *); | |
85 | ||
86 | ||
87 | /** | |
88 | * sys_devices can be simplified a lot from regular devices, because they're | |
89 | * simply not as versatile. | |
90 | */ | |
91 | ||
92 | struct sys_device { | |
93 | u32 id; | |
94 | struct sysdev_class * cls; | |
95 | struct kobject kobj; | |
96 | }; | |
97 | ||
98 | extern int sysdev_register(struct sys_device *); | |
99 | extern void sysdev_unregister(struct sys_device *); | |
100 | ||
101 | ||
102 | struct sysdev_attribute { | |
103 | struct attribute attr; | |
4a0b2b4d AK |
104 | ssize_t (*show)(struct sys_device *, struct sysdev_attribute *, char *); |
105 | ssize_t (*store)(struct sys_device *, struct sysdev_attribute *, | |
106 | const char *, size_t); | |
1da177e4 LT |
107 | }; |
108 | ||
109 | ||
9d1fe323 | 110 | #define _SYSDEV_ATTR(_name, _mode, _show, _store) \ |
7583b6e4 | 111 | { \ |
7b595756 | 112 | .attr = { .name = __stringify(_name), .mode = _mode }, \ |
1da177e4 LT |
113 | .show = _show, \ |
114 | .store = _store, \ | |
7583b6e4 OJ |
115 | } |
116 | ||
9d1fe323 MT |
117 | #define SYSDEV_ATTR(_name, _mode, _show, _store) \ |
118 | struct sysdev_attribute attr_##_name = \ | |
119 | _SYSDEV_ATTR(_name, _mode, _show, _store); | |
1da177e4 LT |
120 | |
121 | extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *); | |
122 | extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *); | |
123 | ||
9800794a AK |
124 | struct sysdev_ext_attribute { |
125 | struct sysdev_attribute attr; | |
126 | void *var; | |
127 | }; | |
128 | ||
129 | /* | |
130 | * Support for simple variable sysdev attributes. | |
131 | * The pointer to the variable is stored in a sysdev_ext_attribute | |
132 | */ | |
133 | ||
134 | /* Add more types as needed */ | |
135 | ||
136 | extern ssize_t sysdev_show_ulong(struct sys_device *, struct sysdev_attribute *, | |
137 | char *); | |
138 | extern ssize_t sysdev_store_ulong(struct sys_device *, | |
139 | struct sysdev_attribute *, const char *, size_t); | |
140 | extern ssize_t sysdev_show_int(struct sys_device *, struct sysdev_attribute *, | |
141 | char *); | |
142 | extern ssize_t sysdev_store_int(struct sys_device *, | |
143 | struct sysdev_attribute *, const char *, size_t); | |
144 | ||
145 | #define _SYSDEV_ULONG_ATTR(_name, _mode, _var) \ | |
146 | { _SYSDEV_ATTR(_name, _mode, sysdev_show_ulong, sysdev_store_ulong), \ | |
147 | &(_var) } | |
148 | #define SYSDEV_ULONG_ATTR(_name, _mode, _var) \ | |
149 | struct sysdev_ext_attribute attr_##_name = \ | |
150 | _SYSDEV_ULONG_ATTR(_name, _mode, _var); | |
151 | #define _SYSDEV_INT_ATTR(_name, _mode, _var) \ | |
152 | { _SYSDEV_ATTR(_name, _mode, sysdev_show_int, sysdev_store_int), \ | |
153 | &(_var) } | |
154 | #define SYSDEV_INT_ATTR(_name, _mode, _var) \ | |
155 | struct sysdev_ext_attribute attr_##_name = \ | |
156 | _SYSDEV_INT_ATTR(_name, _mode, _var); | |
157 | ||
1da177e4 | 158 | #endif /* _SYSDEV_H_ */ |