Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * device.h - generic, centralized driver model | |
3 | * | |
4 | * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org> | |
89790fd7 | 5 | * Copyright (c) 2004-2007 Greg Kroah-Hartman <gregkh@suse.de> |
1da177e4 LT |
6 | * |
7 | * This file is released under the GPLv2 | |
8 | * | |
9 | * See Documentation/driver-model/ for more information. | |
10 | */ | |
11 | ||
12 | #ifndef _DEVICE_H_ | |
13 | #define _DEVICE_H_ | |
14 | ||
1da177e4 LT |
15 | #include <linux/ioport.h> |
16 | #include <linux/kobject.h> | |
465c7a3a | 17 | #include <linux/klist.h> |
1da177e4 | 18 | #include <linux/list.h> |
4a7fb636 | 19 | #include <linux/compiler.h> |
1da177e4 LT |
20 | #include <linux/types.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/pm.h> | |
23 | #include <asm/semaphore.h> | |
24 | #include <asm/atomic.h> | |
c6dbaef2 | 25 | #include <asm/device.h> |
1da177e4 LT |
26 | |
27 | #define DEVICE_NAME_SIZE 50 | |
28 | #define DEVICE_NAME_HALF __stringify(20) /* Less than half to accommodate slop */ | |
29 | #define DEVICE_ID_SIZE 32 | |
30 | #define BUS_ID_SIZE KOBJ_NAME_LEN | |
31 | ||
32 | ||
1da177e4 LT |
33 | struct device; |
34 | struct device_driver; | |
35 | struct class; | |
36 | struct class_device; | |
b8c5cec2 KS |
37 | struct bus_type; |
38 | ||
39 | struct bus_attribute { | |
40 | struct attribute attr; | |
41 | ssize_t (*show)(struct bus_type *, char * buf); | |
42 | ssize_t (*store)(struct bus_type *, const char * buf, size_t count); | |
43 | }; | |
44 | ||
45 | #define BUS_ATTR(_name,_mode,_show,_store) \ | |
46 | struct bus_attribute bus_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
47 | ||
48 | extern int __must_check bus_create_file(struct bus_type *, | |
49 | struct bus_attribute *); | |
50 | extern void bus_remove_file(struct bus_type *, struct bus_attribute *); | |
1da177e4 LT |
51 | |
52 | struct bus_type { | |
8d790d74 | 53 | const char * name; |
b8c5cec2 | 54 | struct module * owner; |
1da177e4 LT |
55 | |
56 | struct subsystem subsys; | |
57 | struct kset drivers; | |
58 | struct kset devices; | |
465c7a3a | 59 | struct klist klist_devices; |
38fdac3c | 60 | struct klist klist_drivers; |
1da177e4 | 61 | |
116af378 BH |
62 | struct blocking_notifier_head bus_notifier; |
63 | ||
1da177e4 LT |
64 | struct bus_attribute * bus_attrs; |
65 | struct device_attribute * dev_attrs; | |
66 | struct driver_attribute * drv_attrs; | |
b8c5cec2 KS |
67 | struct bus_attribute drivers_autoprobe_attr; |
68 | struct bus_attribute drivers_probe_attr; | |
1da177e4 LT |
69 | |
70 | int (*match)(struct device * dev, struct device_driver * drv); | |
312c004d KS |
71 | int (*uevent)(struct device *dev, char **envp, |
72 | int num_envp, char *buffer, int buffer_size); | |
594c8281 RK |
73 | int (*probe)(struct device * dev); |
74 | int (*remove)(struct device * dev); | |
75 | void (*shutdown)(struct device * dev); | |
7c8265f5 | 76 | |
7c8265f5 LT |
77 | int (*suspend)(struct device * dev, pm_message_t state); |
78 | int (*suspend_late)(struct device * dev, pm_message_t state); | |
79 | int (*resume_early)(struct device * dev); | |
80 | int (*resume)(struct device * dev); | |
b8c5cec2 KS |
81 | |
82 | unsigned int drivers_autoprobe:1; | |
1da177e4 LT |
83 | }; |
84 | ||
4a7fb636 | 85 | extern int __must_check bus_register(struct bus_type * bus); |
1da177e4 LT |
86 | extern void bus_unregister(struct bus_type * bus); |
87 | ||
f86db396 | 88 | extern int __must_check bus_rescan_devices(struct bus_type * bus); |
1da177e4 | 89 | |
1da177e4 LT |
90 | /* iterator helpers for buses */ |
91 | ||
92 | int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data, | |
93 | int (*fn)(struct device *, void *)); | |
0edb5860 CH |
94 | struct device * bus_find_device(struct bus_type *bus, struct device *start, |
95 | void *data, int (*match)(struct device *, void *)); | |
1da177e4 | 96 | |
4a7fb636 AM |
97 | int __must_check bus_for_each_drv(struct bus_type *bus, |
98 | struct device_driver *start, void *data, | |
99 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 100 | |
116af378 BH |
101 | /* |
102 | * Bus notifiers: Get notified of addition/removal of devices | |
103 | * and binding/unbinding of drivers to devices. | |
104 | * In the long run, it should be a replacement for the platform | |
105 | * notify hooks. | |
106 | */ | |
107 | struct notifier_block; | |
108 | ||
109 | extern int bus_register_notifier(struct bus_type *bus, | |
110 | struct notifier_block *nb); | |
111 | extern int bus_unregister_notifier(struct bus_type *bus, | |
112 | struct notifier_block *nb); | |
113 | ||
114 | /* All 4 notifers below get called with the target struct device * | |
115 | * as an argument. Note that those functions are likely to be called | |
116 | * with the device semaphore held in the core, so be careful. | |
117 | */ | |
118 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
119 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
120 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
121 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
122 | unbound */ | |
123 | ||
1da177e4 | 124 | struct device_driver { |
8d790d74 | 125 | const char * name; |
1da177e4 LT |
126 | struct bus_type * bus; |
127 | ||
128 | struct completion unloaded; | |
129 | struct kobject kobj; | |
94e7b1c5 | 130 | struct klist klist_devices; |
38fdac3c | 131 | struct klist_node knode_bus; |
1da177e4 | 132 | |
8d790d74 | 133 | struct module * owner; |
f30c53a8 | 134 | const char * mod_name; /* used for built-in modules */ |
0c84ce26 | 135 | struct module_kobject * mkobj; |
1da177e4 LT |
136 | |
137 | int (*probe) (struct device * dev); | |
8d790d74 | 138 | int (*remove) (struct device * dev); |
1da177e4 | 139 | void (*shutdown) (struct device * dev); |
9480e307 RK |
140 | int (*suspend) (struct device * dev, pm_message_t state); |
141 | int (*resume) (struct device * dev); | |
d779249e GKH |
142 | |
143 | unsigned int multithread_probe:1; | |
1da177e4 LT |
144 | }; |
145 | ||
146 | ||
4a7fb636 | 147 | extern int __must_check driver_register(struct device_driver * drv); |
1da177e4 LT |
148 | extern void driver_unregister(struct device_driver * drv); |
149 | ||
150 | extern struct device_driver * get_driver(struct device_driver * drv); | |
151 | extern void put_driver(struct device_driver * drv); | |
152 | extern struct device_driver *driver_find(const char *name, struct bus_type *bus); | |
d779249e | 153 | extern int driver_probe_done(void); |
1da177e4 | 154 | |
405ae7d3 | 155 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
156 | |
157 | struct driver_attribute { | |
158 | struct attribute attr; | |
159 | ssize_t (*show)(struct device_driver *, char * buf); | |
160 | ssize_t (*store)(struct device_driver *, const char * buf, size_t count); | |
161 | }; | |
162 | ||
163 | #define DRIVER_ATTR(_name,_mode,_show,_store) \ | |
164 | struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
165 | ||
4a7fb636 AM |
166 | extern int __must_check driver_create_file(struct device_driver *, |
167 | struct driver_attribute *); | |
1da177e4 LT |
168 | extern void driver_remove_file(struct device_driver *, struct driver_attribute *); |
169 | ||
4a7fb636 AM |
170 | extern int __must_check driver_for_each_device(struct device_driver * drv, |
171 | struct device *start, void *data, | |
172 | int (*fn)(struct device *, void *)); | |
0edb5860 CH |
173 | struct device * driver_find_device(struct device_driver *drv, |
174 | struct device *start, void *data, | |
175 | int (*match)(struct device *, void *)); | |
fae3cd00 | 176 | |
1da177e4 LT |
177 | /* |
178 | * device classes | |
179 | */ | |
180 | struct class { | |
8d790d74 | 181 | const char * name; |
e9ba6365 | 182 | struct module * owner; |
1da177e4 LT |
183 | |
184 | struct subsystem subsys; | |
185 | struct list_head children; | |
23681e47 | 186 | struct list_head devices; |
1da177e4 | 187 | struct list_head interfaces; |
86406245 | 188 | struct kset class_dirs; |
1da177e4 LT |
189 | struct semaphore sem; /* locks both the children and interfaces lists */ |
190 | ||
191 | struct class_attribute * class_attrs; | |
192 | struct class_device_attribute * class_dev_attrs; | |
2620efef | 193 | struct device_attribute * dev_attrs; |
1da177e4 | 194 | |
312c004d | 195 | int (*uevent)(struct class_device *dev, char **envp, |
1da177e4 | 196 | int num_envp, char *buffer, int buffer_size); |
2620efef GKH |
197 | int (*dev_uevent)(struct device *dev, char **envp, int num_envp, |
198 | char *buffer, int buffer_size); | |
1da177e4 LT |
199 | |
200 | void (*release)(struct class_device *dev); | |
201 | void (*class_release)(struct class *class); | |
2620efef | 202 | void (*dev_release)(struct device *dev); |
7c8265f5 LT |
203 | |
204 | int (*suspend)(struct device *, pm_message_t state); | |
205 | int (*resume)(struct device *); | |
1da177e4 LT |
206 | }; |
207 | ||
4a7fb636 | 208 | extern int __must_check class_register(struct class *); |
1da177e4 LT |
209 | extern void class_unregister(struct class *); |
210 | ||
1da177e4 LT |
211 | |
212 | struct class_attribute { | |
213 | struct attribute attr; | |
214 | ssize_t (*show)(struct class *, char * buf); | |
215 | ssize_t (*store)(struct class *, const char * buf, size_t count); | |
216 | }; | |
217 | ||
218 | #define CLASS_ATTR(_name,_mode,_show,_store) \ | |
219 | struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
220 | ||
4a7fb636 AM |
221 | extern int __must_check class_create_file(struct class *, |
222 | const struct class_attribute *); | |
1da177e4 LT |
223 | extern void class_remove_file(struct class *, const struct class_attribute *); |
224 | ||
a7fd6706 KS |
225 | struct class_device_attribute { |
226 | struct attribute attr; | |
227 | ssize_t (*show)(struct class_device *, char * buf); | |
228 | ssize_t (*store)(struct class_device *, const char * buf, size_t count); | |
229 | }; | |
230 | ||
231 | #define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \ | |
232 | struct class_device_attribute class_device_attr_##_name = \ | |
233 | __ATTR(_name,_mode,_show,_store) | |
234 | ||
4a7fb636 | 235 | extern int __must_check class_device_create_file(struct class_device *, |
a7fd6706 | 236 | const struct class_device_attribute *); |
1da177e4 | 237 | |
74be227f GKH |
238 | /** |
239 | * struct class_device - class devices | |
240 | * @class: pointer to the parent class for this class device. This is required. | |
241 | * @devt: for internal use by the driver core only. | |
242 | * @node: for internal use by the driver core only. | |
243 | * @kobj: for internal use by the driver core only. | |
244 | * @devt_attr: for internal use by the driver core only. | |
1498221d | 245 | * @groups: optional additional groups to be created |
74be227f GKH |
246 | * @dev: if set, a symlink to the struct device is created in the sysfs |
247 | * directory for this struct class device. | |
248 | * @class_data: pointer to whatever you want to store here for this struct | |
249 | * class_device. Use class_get_devdata() and class_set_devdata() to get and | |
250 | * set this pointer. | |
251 | * @parent: pointer to a struct class_device that is the parent of this struct | |
252 | * class_device. If NULL, this class_device will show up at the root of the | |
253 | * struct class in sysfs (which is probably what you want to have happen.) | |
254 | * @release: pointer to a release function for this struct class_device. If | |
255 | * set, this will be called instead of the class specific release function. | |
256 | * Only use this if you want to override the default release function, like | |
257 | * when you are nesting class_device structures. | |
312c004d KS |
258 | * @uevent: pointer to a uevent function for this struct class_device. If |
259 | * set, this will be called instead of the class specific uevent function. | |
260 | * Only use this if you want to override the default uevent function, like | |
74be227f GKH |
261 | * when you are nesting class_device structures. |
262 | */ | |
1da177e4 LT |
263 | struct class_device { |
264 | struct list_head node; | |
265 | ||
266 | struct kobject kobj; | |
267 | struct class * class; /* required */ | |
268 | dev_t devt; /* dev_t, creates the sysfs "dev" */ | |
e9ba6365 | 269 | struct class_device_attribute *devt_attr; |
a7fd6706 | 270 | struct class_device_attribute uevent_attr; |
1da177e4 LT |
271 | struct device * dev; /* not necessary, but nice to have */ |
272 | void * class_data; /* class-specific data */ | |
51d172d5 | 273 | struct class_device *parent; /* parent of this child device, if there is one */ |
1498221d | 274 | struct attribute_group ** groups; /* optional groups */ |
1da177e4 | 275 | |
51d172d5 | 276 | void (*release)(struct class_device *dev); |
312c004d | 277 | int (*uevent)(struct class_device *dev, char **envp, |
51d172d5 | 278 | int num_envp, char *buffer, int buffer_size); |
1da177e4 LT |
279 | char class_id[BUS_ID_SIZE]; /* unique to this class */ |
280 | }; | |
281 | ||
282 | static inline void * | |
283 | class_get_devdata (struct class_device *dev) | |
284 | { | |
285 | return dev->class_data; | |
286 | } | |
287 | ||
288 | static inline void | |
289 | class_set_devdata (struct class_device *dev, void *data) | |
290 | { | |
291 | dev->class_data = data; | |
292 | } | |
293 | ||
294 | ||
4a7fb636 | 295 | extern int __must_check class_device_register(struct class_device *); |
1da177e4 LT |
296 | extern void class_device_unregister(struct class_device *); |
297 | extern void class_device_initialize(struct class_device *); | |
4a7fb636 | 298 | extern int __must_check class_device_add(struct class_device *); |
1da177e4 LT |
299 | extern void class_device_del(struct class_device *); |
300 | ||
1da177e4 LT |
301 | extern struct class_device * class_device_get(struct class_device *); |
302 | extern void class_device_put(struct class_device *); | |
303 | ||
1da177e4 LT |
304 | extern void class_device_remove_file(struct class_device *, |
305 | const struct class_device_attribute *); | |
4a7fb636 | 306 | extern int __must_check class_device_create_bin_file(struct class_device *, |
1da177e4 LT |
307 | struct bin_attribute *); |
308 | extern void class_device_remove_bin_file(struct class_device *, | |
309 | struct bin_attribute *); | |
310 | ||
311 | struct class_interface { | |
312 | struct list_head node; | |
313 | struct class *class; | |
314 | ||
d8539d81 DT |
315 | int (*add) (struct class_device *, struct class_interface *); |
316 | void (*remove) (struct class_device *, struct class_interface *); | |
c47ed219 GKH |
317 | int (*add_dev) (struct device *, struct class_interface *); |
318 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
319 | }; |
320 | ||
4a7fb636 | 321 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
322 | extern void class_interface_unregister(struct class_interface *); |
323 | ||
ab7d7371 | 324 | extern struct class *class_create(struct module *owner, const char *name); |
e9ba6365 | 325 | extern void class_destroy(struct class *cls); |
51d172d5 GKH |
326 | extern struct class_device *class_device_create(struct class *cls, |
327 | struct class_device *parent, | |
328 | dev_t devt, | |
329 | struct device *device, | |
ddd5d35a | 330 | const char *fmt, ...) |
51d172d5 | 331 | __attribute__((format(printf,5,6))); |
e9ba6365 | 332 | extern void class_device_destroy(struct class *cls, dev_t devt); |
333 | ||
f9f852df KS |
334 | struct device_type { |
335 | struct device_attribute *attrs; | |
336 | int (*uevent)(struct device *dev, char **envp, int num_envp, | |
337 | char *buffer, int buffer_size); | |
338 | void (*release)(struct device *dev); | |
339 | }; | |
340 | ||
a7fd6706 KS |
341 | /* interface for exporting device attributes */ |
342 | struct device_attribute { | |
343 | struct attribute attr; | |
344 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
345 | char *buf); | |
346 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
347 | const char *buf, size_t count); | |
348 | }; | |
349 | ||
350 | #define DEVICE_ATTR(_name,_mode,_show,_store) \ | |
351 | struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
352 | ||
4a7fb636 AM |
353 | extern int __must_check device_create_file(struct device *device, |
354 | struct device_attribute * entry); | |
a7fd6706 | 355 | extern void device_remove_file(struct device * dev, struct device_attribute * attr); |
2589f188 GKH |
356 | extern int __must_check device_create_bin_file(struct device *dev, |
357 | struct bin_attribute *attr); | |
358 | extern void device_remove_bin_file(struct device *dev, | |
359 | struct bin_attribute *attr); | |
d9a9cdfb AS |
360 | extern int device_schedule_callback(struct device *dev, |
361 | void (*func)(struct device *)); | |
9ac7849e TH |
362 | |
363 | /* device resource management */ | |
364 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
365 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
366 | ||
367 | #ifdef CONFIG_DEBUG_DEVRES | |
368 | extern void * __devres_alloc(dr_release_t release, size_t size, gfp_t gfp, | |
369 | const char *name); | |
370 | #define devres_alloc(release, size, gfp) \ | |
371 | __devres_alloc(release, size, gfp, #release) | |
372 | #else | |
373 | extern void * devres_alloc(dr_release_t release, size_t size, gfp_t gfp); | |
374 | #endif | |
375 | extern void devres_free(void *res); | |
376 | extern void devres_add(struct device *dev, void *res); | |
377 | extern void * devres_find(struct device *dev, dr_release_t release, | |
378 | dr_match_t match, void *match_data); | |
379 | extern void * devres_get(struct device *dev, void *new_res, | |
380 | dr_match_t match, void *match_data); | |
381 | extern void * devres_remove(struct device *dev, dr_release_t release, | |
382 | dr_match_t match, void *match_data); | |
383 | extern int devres_destroy(struct device *dev, dr_release_t release, | |
384 | dr_match_t match, void *match_data); | |
385 | ||
386 | /* devres group */ | |
387 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
388 | gfp_t gfp); | |
389 | extern void devres_close_group(struct device *dev, void *id); | |
390 | extern void devres_remove_group(struct device *dev, void *id); | |
391 | extern int devres_release_group(struct device *dev, void *id); | |
392 | ||
393 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
394 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
395 | extern void devm_kfree(struct device *dev, void *p); | |
396 | ||
1da177e4 | 397 | struct device { |
36239577 | 398 | struct klist klist_children; |
399 | struct klist_node knode_parent; /* node in sibling list */ | |
94e7b1c5 | 400 | struct klist_node knode_driver; |
465c7a3a | 401 | struct klist_node knode_bus; |
1da177e4 LT |
402 | struct device * parent; |
403 | ||
404 | struct kobject kobj; | |
405 | char bus_id[BUS_ID_SIZE]; /* position on parent bus */ | |
f9f852df | 406 | struct device_type *type; |
f2eaae19 | 407 | unsigned is_registered:1; |
a7fd6706 | 408 | struct device_attribute uevent_attr; |
23681e47 | 409 | struct device_attribute *devt_attr; |
1da177e4 | 410 | |
af70316a | 411 | struct semaphore sem; /* semaphore to synchronize calls to |
412 | * its driver. | |
413 | */ | |
414 | ||
1da177e4 LT |
415 | struct bus_type * bus; /* type of bus device is on */ |
416 | struct device_driver *driver; /* which driver has allocated this | |
417 | device */ | |
418 | void *driver_data; /* data private to the driver */ | |
4e10d12a DSL |
419 | void *platform_data; /* Platform specific data, device |
420 | core doesn't touch it */ | |
1da177e4 LT |
421 | struct dev_pm_info power; |
422 | ||
87348136 CH |
423 | #ifdef CONFIG_NUMA |
424 | int numa_node; /* NUMA node this device is close to */ | |
425 | #endif | |
1da177e4 LT |
426 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
427 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
428 | alloc_coherent mappings as | |
429 | not all hardware supports | |
430 | 64 bit addresses for consistent | |
431 | allocations such descriptors. */ | |
432 | ||
433 | struct list_head dma_pools; /* dma pools (if dma'ble) */ | |
434 | ||
435 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
436 | override */ | |
c6dbaef2 BH |
437 | /* arch specific additions */ |
438 | struct dev_archdata archdata; | |
1da177e4 | 439 | |
9ac7849e TH |
440 | spinlock_t devres_lock; |
441 | struct list_head devres_head; | |
442 | ||
23681e47 GKH |
443 | /* class_device migration path */ |
444 | struct list_head node; | |
b7a3e813 | 445 | struct class *class; |
23681e47 | 446 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
de0ff00d | 447 | struct attribute_group **groups; /* optional groups */ |
b7a3e813 | 448 | int uevent_suppress; |
23681e47 | 449 | |
1da177e4 LT |
450 | void (*release)(struct device * dev); |
451 | }; | |
452 | ||
87348136 CH |
453 | #ifdef CONFIG_NUMA |
454 | static inline int dev_to_node(struct device *dev) | |
455 | { | |
456 | return dev->numa_node; | |
457 | } | |
458 | static inline void set_dev_node(struct device *dev, int node) | |
459 | { | |
460 | dev->numa_node = node; | |
461 | } | |
462 | #else | |
463 | static inline int dev_to_node(struct device *dev) | |
464 | { | |
465 | return -1; | |
466 | } | |
467 | static inline void set_dev_node(struct device *dev, int node) | |
468 | { | |
469 | } | |
470 | #endif | |
471 | ||
1da177e4 LT |
472 | static inline void * |
473 | dev_get_drvdata (struct device *dev) | |
474 | { | |
475 | return dev->driver_data; | |
476 | } | |
477 | ||
478 | static inline void | |
479 | dev_set_drvdata (struct device *dev, void *data) | |
480 | { | |
481 | dev->driver_data = data; | |
482 | } | |
483 | ||
d305ef5d DR |
484 | static inline int device_is_registered(struct device *dev) |
485 | { | |
f2eaae19 | 486 | return dev->is_registered; |
d305ef5d DR |
487 | } |
488 | ||
1f21782e AB |
489 | void driver_init(void); |
490 | ||
1da177e4 LT |
491 | /* |
492 | * High level routines for use by the bus drivers | |
493 | */ | |
4a7fb636 | 494 | extern int __must_check device_register(struct device * dev); |
1da177e4 LT |
495 | extern void device_unregister(struct device * dev); |
496 | extern void device_initialize(struct device * dev); | |
4a7fb636 | 497 | extern int __must_check device_add(struct device * dev); |
1da177e4 | 498 | extern void device_del(struct device * dev); |
04fed361 | 499 | extern int device_for_each_child(struct device *, void *, |
1da177e4 | 500 | int (*fn)(struct device *, void *)); |
5ab69981 CH |
501 | extern struct device *device_find_child(struct device *, void *data, |
502 | int (*match)(struct device *, void *)); | |
a2de48ca | 503 | extern int device_rename(struct device *dev, char *new_name); |
8a82472f | 504 | extern int device_move(struct device *dev, struct device *new_parent); |
1da177e4 LT |
505 | |
506 | /* | |
507 | * Manual binding of a device to driver. See drivers/base/bus.c | |
508 | * for information on use. | |
509 | */ | |
f86db396 | 510 | extern int __must_check device_bind_driver(struct device *dev); |
1da177e4 | 511 | extern void device_release_driver(struct device * dev); |
4a7fb636 | 512 | extern int __must_check device_attach(struct device * dev); |
f86db396 AM |
513 | extern int __must_check driver_attach(struct device_driver *drv); |
514 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 515 | |
23681e47 GKH |
516 | /* |
517 | * Easy functions for dynamically creating devices on the fly | |
518 | */ | |
519 | extern struct device *device_create(struct class *cls, struct device *parent, | |
5cbe5f8a | 520 | dev_t devt, const char *fmt, ...) |
23681e47 GKH |
521 | __attribute__((format(printf,4,5))); |
522 | extern void device_destroy(struct class *cls, dev_t devt); | |
1da177e4 | 523 | |
1da177e4 LT |
524 | /* |
525 | * Platform "fixup" functions - allow the platform to have their say | |
526 | * about devices and actions that the general device layer doesn't | |
527 | * know about. | |
528 | */ | |
529 | /* Notify platform of device discovery */ | |
530 | extern int (*platform_notify)(struct device * dev); | |
531 | ||
532 | extern int (*platform_notify_remove)(struct device * dev); | |
533 | ||
534 | ||
535 | /** | |
536 | * get_device - atomically increment the reference count for the device. | |
537 | * | |
538 | */ | |
539 | extern struct device * get_device(struct device * dev); | |
540 | extern void put_device(struct device * dev); | |
1da177e4 LT |
541 | |
542 | ||
116f232b | 543 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
544 | extern void device_shutdown(void); |
545 | ||
546 | ||
547 | /* drivers/base/firmware.c */ | |
4a7fb636 | 548 | extern int __must_check firmware_register(struct subsystem *); |
1da177e4 LT |
549 | extern void firmware_unregister(struct subsystem *); |
550 | ||
551 | /* debugging and troubleshooting/diagnostic helpers. */ | |
3e95637a | 552 | extern const char *dev_driver_string(struct device *dev); |
1da177e4 | 553 | #define dev_printk(level, dev, format, arg...) \ |
3e95637a | 554 | printk(level "%s %s: " format , dev_driver_string(dev) , (dev)->bus_id , ## arg) |
1da177e4 LT |
555 | |
556 | #ifdef DEBUG | |
557 | #define dev_dbg(dev, format, arg...) \ | |
558 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
559 | #else | |
560 | #define dev_dbg(dev, format, arg...) do { (void)(dev); } while (0) | |
561 | #endif | |
562 | ||
563 | #define dev_err(dev, format, arg...) \ | |
564 | dev_printk(KERN_ERR , dev , format , ## arg) | |
565 | #define dev_info(dev, format, arg...) \ | |
566 | dev_printk(KERN_INFO , dev , format , ## arg) | |
567 | #define dev_warn(dev, format, arg...) \ | |
568 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
4f2928d0 TS |
569 | #define dev_notice(dev, format, arg...) \ |
570 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
1da177e4 LT |
571 | |
572 | /* Create alias, so I can be autoloaded. */ | |
573 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
574 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
575 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
576 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
577 | #endif /* _DEVICE_H_ */ |