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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; |
1da177e4 | 54 | |
823bccfc | 55 | struct kset subsys; |
6dcec251 | 56 | struct kset *drivers_kset; |
3d899596 | 57 | struct kset *devices_kset; |
465c7a3a | 58 | struct klist klist_devices; |
38fdac3c | 59 | struct klist klist_drivers; |
1da177e4 | 60 | |
116af378 BH |
61 | struct blocking_notifier_head bus_notifier; |
62 | ||
1da177e4 LT |
63 | struct bus_attribute * bus_attrs; |
64 | struct device_attribute * dev_attrs; | |
65 | struct driver_attribute * drv_attrs; | |
66 | ||
67 | int (*match)(struct device * dev, struct device_driver * drv); | |
7eff2e7a | 68 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
594c8281 RK |
69 | int (*probe)(struct device * dev); |
70 | int (*remove)(struct device * dev); | |
71 | void (*shutdown)(struct device * dev); | |
7c8265f5 | 72 | |
7c8265f5 LT |
73 | int (*suspend)(struct device * dev, pm_message_t state); |
74 | int (*suspend_late)(struct device * dev, pm_message_t state); | |
75 | int (*resume_early)(struct device * dev); | |
76 | int (*resume)(struct device * dev); | |
b8c5cec2 KS |
77 | |
78 | unsigned int drivers_autoprobe:1; | |
1da177e4 LT |
79 | }; |
80 | ||
4a7fb636 | 81 | extern int __must_check bus_register(struct bus_type * bus); |
1da177e4 LT |
82 | extern void bus_unregister(struct bus_type * bus); |
83 | ||
f86db396 | 84 | extern int __must_check bus_rescan_devices(struct bus_type * bus); |
1da177e4 | 85 | |
1da177e4 LT |
86 | /* iterator helpers for buses */ |
87 | ||
88 | int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data, | |
89 | int (*fn)(struct device *, void *)); | |
0edb5860 CH |
90 | struct device * bus_find_device(struct bus_type *bus, struct device *start, |
91 | void *data, int (*match)(struct device *, void *)); | |
1da177e4 | 92 | |
4a7fb636 AM |
93 | int __must_check bus_for_each_drv(struct bus_type *bus, |
94 | struct device_driver *start, void *data, | |
95 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 96 | |
116af378 BH |
97 | /* |
98 | * Bus notifiers: Get notified of addition/removal of devices | |
99 | * and binding/unbinding of drivers to devices. | |
100 | * In the long run, it should be a replacement for the platform | |
101 | * notify hooks. | |
102 | */ | |
103 | struct notifier_block; | |
104 | ||
105 | extern int bus_register_notifier(struct bus_type *bus, | |
106 | struct notifier_block *nb); | |
107 | extern int bus_unregister_notifier(struct bus_type *bus, | |
108 | struct notifier_block *nb); | |
109 | ||
110 | /* All 4 notifers below get called with the target struct device * | |
111 | * as an argument. Note that those functions are likely to be called | |
112 | * with the device semaphore held in the core, so be careful. | |
113 | */ | |
114 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
115 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
116 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
117 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
118 | unbound */ | |
119 | ||
0fed80f7 GKH |
120 | extern struct kset *bus_get_kset(struct bus_type *bus); |
121 | ||
1da177e4 | 122 | struct device_driver { |
8d790d74 | 123 | const char * name; |
1da177e4 LT |
124 | struct bus_type * bus; |
125 | ||
1da177e4 | 126 | struct kobject kobj; |
94e7b1c5 | 127 | struct klist klist_devices; |
38fdac3c | 128 | struct klist_node knode_bus; |
1da177e4 | 129 | |
8d790d74 | 130 | struct module * owner; |
f30c53a8 | 131 | const char * mod_name; /* used for built-in modules */ |
0c84ce26 | 132 | struct module_kobject * mkobj; |
1da177e4 LT |
133 | |
134 | int (*probe) (struct device * dev); | |
8d790d74 | 135 | int (*remove) (struct device * dev); |
1da177e4 | 136 | void (*shutdown) (struct device * dev); |
9480e307 RK |
137 | int (*suspend) (struct device * dev, pm_message_t state); |
138 | int (*resume) (struct device * dev); | |
1da177e4 LT |
139 | }; |
140 | ||
141 | ||
4a7fb636 | 142 | extern int __must_check driver_register(struct device_driver * drv); |
1da177e4 LT |
143 | extern void driver_unregister(struct device_driver * drv); |
144 | ||
145 | extern struct device_driver * get_driver(struct device_driver * drv); | |
146 | extern void put_driver(struct device_driver * drv); | |
147 | extern struct device_driver *driver_find(const char *name, struct bus_type *bus); | |
d779249e | 148 | extern int driver_probe_done(void); |
1da177e4 | 149 | |
405ae7d3 | 150 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
151 | |
152 | struct driver_attribute { | |
153 | struct attribute attr; | |
154 | ssize_t (*show)(struct device_driver *, char * buf); | |
155 | ssize_t (*store)(struct device_driver *, const char * buf, size_t count); | |
156 | }; | |
157 | ||
158 | #define DRIVER_ATTR(_name,_mode,_show,_store) \ | |
159 | struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
160 | ||
4a7fb636 AM |
161 | extern int __must_check driver_create_file(struct device_driver *, |
162 | struct driver_attribute *); | |
1da177e4 LT |
163 | extern void driver_remove_file(struct device_driver *, struct driver_attribute *); |
164 | ||
4a7fb636 AM |
165 | extern int __must_check driver_for_each_device(struct device_driver * drv, |
166 | struct device *start, void *data, | |
167 | int (*fn)(struct device *, void *)); | |
0edb5860 CH |
168 | struct device * driver_find_device(struct device_driver *drv, |
169 | struct device *start, void *data, | |
170 | int (*match)(struct device *, void *)); | |
fae3cd00 | 171 | |
1da177e4 LT |
172 | /* |
173 | * device classes | |
174 | */ | |
175 | struct class { | |
8d790d74 | 176 | const char * name; |
e9ba6365 | 177 | struct module * owner; |
1da177e4 | 178 | |
823bccfc | 179 | struct kset subsys; |
1da177e4 | 180 | struct list_head children; |
23681e47 | 181 | struct list_head devices; |
1da177e4 | 182 | struct list_head interfaces; |
86406245 | 183 | struct kset class_dirs; |
1da177e4 LT |
184 | struct semaphore sem; /* locks both the children and interfaces lists */ |
185 | ||
186 | struct class_attribute * class_attrs; | |
187 | struct class_device_attribute * class_dev_attrs; | |
2620efef | 188 | struct device_attribute * dev_attrs; |
1da177e4 | 189 | |
7eff2e7a KS |
190 | int (*uevent)(struct class_device *dev, struct kobj_uevent_env *env); |
191 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); | |
1da177e4 LT |
192 | |
193 | void (*release)(struct class_device *dev); | |
194 | void (*class_release)(struct class *class); | |
2620efef | 195 | void (*dev_release)(struct device *dev); |
7c8265f5 LT |
196 | |
197 | int (*suspend)(struct device *, pm_message_t state); | |
198 | int (*resume)(struct device *); | |
1da177e4 LT |
199 | }; |
200 | ||
4a7fb636 | 201 | extern int __must_check class_register(struct class *); |
1da177e4 LT |
202 | extern void class_unregister(struct class *); |
203 | ||
1da177e4 LT |
204 | |
205 | struct class_attribute { | |
206 | struct attribute attr; | |
207 | ssize_t (*show)(struct class *, char * buf); | |
208 | ssize_t (*store)(struct class *, const char * buf, size_t count); | |
209 | }; | |
210 | ||
211 | #define CLASS_ATTR(_name,_mode,_show,_store) \ | |
212 | struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
213 | ||
4a7fb636 AM |
214 | extern int __must_check class_create_file(struct class *, |
215 | const struct class_attribute *); | |
1da177e4 LT |
216 | extern void class_remove_file(struct class *, const struct class_attribute *); |
217 | ||
a7fd6706 KS |
218 | struct class_device_attribute { |
219 | struct attribute attr; | |
220 | ssize_t (*show)(struct class_device *, char * buf); | |
221 | ssize_t (*store)(struct class_device *, const char * buf, size_t count); | |
222 | }; | |
223 | ||
224 | #define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \ | |
225 | struct class_device_attribute class_device_attr_##_name = \ | |
226 | __ATTR(_name,_mode,_show,_store) | |
227 | ||
4a7fb636 | 228 | extern int __must_check class_device_create_file(struct class_device *, |
a7fd6706 | 229 | const struct class_device_attribute *); |
1da177e4 | 230 | |
74be227f GKH |
231 | /** |
232 | * struct class_device - class devices | |
233 | * @class: pointer to the parent class for this class device. This is required. | |
234 | * @devt: for internal use by the driver core only. | |
235 | * @node: for internal use by the driver core only. | |
236 | * @kobj: for internal use by the driver core only. | |
1498221d | 237 | * @groups: optional additional groups to be created |
74be227f GKH |
238 | * @dev: if set, a symlink to the struct device is created in the sysfs |
239 | * directory for this struct class device. | |
240 | * @class_data: pointer to whatever you want to store here for this struct | |
241 | * class_device. Use class_get_devdata() and class_set_devdata() to get and | |
242 | * set this pointer. | |
243 | * @parent: pointer to a struct class_device that is the parent of this struct | |
244 | * class_device. If NULL, this class_device will show up at the root of the | |
245 | * struct class in sysfs (which is probably what you want to have happen.) | |
246 | * @release: pointer to a release function for this struct class_device. If | |
247 | * set, this will be called instead of the class specific release function. | |
248 | * Only use this if you want to override the default release function, like | |
249 | * when you are nesting class_device structures. | |
312c004d KS |
250 | * @uevent: pointer to a uevent function for this struct class_device. If |
251 | * set, this will be called instead of the class specific uevent function. | |
252 | * Only use this if you want to override the default uevent function, like | |
74be227f GKH |
253 | * when you are nesting class_device structures. |
254 | */ | |
1da177e4 LT |
255 | struct class_device { |
256 | struct list_head node; | |
257 | ||
258 | struct kobject kobj; | |
259 | struct class * class; /* required */ | |
260 | dev_t devt; /* dev_t, creates the sysfs "dev" */ | |
261 | struct device * dev; /* not necessary, but nice to have */ | |
262 | void * class_data; /* class-specific data */ | |
51d172d5 | 263 | struct class_device *parent; /* parent of this child device, if there is one */ |
1498221d | 264 | struct attribute_group ** groups; /* optional groups */ |
1da177e4 | 265 | |
51d172d5 | 266 | void (*release)(struct class_device *dev); |
7eff2e7a | 267 | int (*uevent)(struct class_device *dev, struct kobj_uevent_env *env); |
1da177e4 LT |
268 | char class_id[BUS_ID_SIZE]; /* unique to this class */ |
269 | }; | |
270 | ||
271 | static inline void * | |
272 | class_get_devdata (struct class_device *dev) | |
273 | { | |
274 | return dev->class_data; | |
275 | } | |
276 | ||
277 | static inline void | |
278 | class_set_devdata (struct class_device *dev, void *data) | |
279 | { | |
280 | dev->class_data = data; | |
281 | } | |
282 | ||
283 | ||
4a7fb636 | 284 | extern int __must_check class_device_register(struct class_device *); |
1da177e4 LT |
285 | extern void class_device_unregister(struct class_device *); |
286 | extern void class_device_initialize(struct class_device *); | |
4a7fb636 | 287 | extern int __must_check class_device_add(struct class_device *); |
1da177e4 LT |
288 | extern void class_device_del(struct class_device *); |
289 | ||
1da177e4 LT |
290 | extern struct class_device * class_device_get(struct class_device *); |
291 | extern void class_device_put(struct class_device *); | |
292 | ||
1da177e4 LT |
293 | extern void class_device_remove_file(struct class_device *, |
294 | const struct class_device_attribute *); | |
d919fd43 GKH |
295 | extern int __must_check class_device_create_bin_file(struct class_device *, |
296 | struct bin_attribute *); | |
297 | extern void class_device_remove_bin_file(struct class_device *, | |
298 | struct bin_attribute *); | |
1da177e4 LT |
299 | |
300 | struct class_interface { | |
301 | struct list_head node; | |
302 | struct class *class; | |
303 | ||
d8539d81 DT |
304 | int (*add) (struct class_device *, struct class_interface *); |
305 | void (*remove) (struct class_device *, struct class_interface *); | |
c47ed219 GKH |
306 | int (*add_dev) (struct device *, struct class_interface *); |
307 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
308 | }; |
309 | ||
4a7fb636 | 310 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
311 | extern void class_interface_unregister(struct class_interface *); |
312 | ||
ab7d7371 | 313 | extern struct class *class_create(struct module *owner, const char *name); |
e9ba6365 | 314 | extern void class_destroy(struct class *cls); |
51d172d5 GKH |
315 | extern struct class_device *class_device_create(struct class *cls, |
316 | struct class_device *parent, | |
317 | dev_t devt, | |
318 | struct device *device, | |
ddd5d35a | 319 | const char *fmt, ...) |
51d172d5 | 320 | __attribute__((format(printf,5,6))); |
e9ba6365 GKH |
321 | extern void class_device_destroy(struct class *cls, dev_t devt); |
322 | ||
414264f9 KS |
323 | /* |
324 | * The type of device, "struct device" is embedded in. A class | |
325 | * or bus can contain devices of different types | |
326 | * like "partitions" and "disks", "mouse" and "event". | |
327 | * This identifies the device type and carries type-specific | |
328 | * information, equivalent to the kobj_type of a kobject. | |
329 | * If "name" is specified, the uevent will contain it in | |
330 | * the DEVTYPE variable. | |
331 | */ | |
f9f852df | 332 | struct device_type { |
414264f9 | 333 | const char *name; |
621a1672 | 334 | struct attribute_group **groups; |
7eff2e7a | 335 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
f9f852df | 336 | void (*release)(struct device *dev); |
f89cbc39 DT |
337 | int (*suspend)(struct device * dev, pm_message_t state); |
338 | int (*resume)(struct device * dev); | |
f9f852df KS |
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); | |
523ded71 AS |
360 | extern int device_schedule_callback_owner(struct device *dev, |
361 | void (*func)(struct device *), struct module *owner); | |
362 | ||
363 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
364 | #define device_schedule_callback(dev, func) \ | |
365 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
366 | |
367 | /* device resource management */ | |
368 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
369 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
370 | ||
371 | #ifdef CONFIG_DEBUG_DEVRES | |
372 | extern void * __devres_alloc(dr_release_t release, size_t size, gfp_t gfp, | |
373 | const char *name); | |
374 | #define devres_alloc(release, size, gfp) \ | |
375 | __devres_alloc(release, size, gfp, #release) | |
376 | #else | |
377 | extern void * devres_alloc(dr_release_t release, size_t size, gfp_t gfp); | |
378 | #endif | |
379 | extern void devres_free(void *res); | |
380 | extern void devres_add(struct device *dev, void *res); | |
381 | extern void * devres_find(struct device *dev, dr_release_t release, | |
382 | dr_match_t match, void *match_data); | |
383 | extern void * devres_get(struct device *dev, void *new_res, | |
384 | dr_match_t match, void *match_data); | |
385 | extern void * devres_remove(struct device *dev, dr_release_t release, | |
386 | dr_match_t match, void *match_data); | |
387 | extern int devres_destroy(struct device *dev, dr_release_t release, | |
388 | dr_match_t match, void *match_data); | |
389 | ||
390 | /* devres group */ | |
391 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
392 | gfp_t gfp); | |
393 | extern void devres_close_group(struct device *dev, void *id); | |
394 | extern void devres_remove_group(struct device *dev, void *id); | |
395 | extern int devres_release_group(struct device *dev, void *id); | |
396 | ||
397 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
398 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
399 | extern void devm_kfree(struct device *dev, void *p); | |
400 | ||
1da177e4 | 401 | struct device { |
36239577 PM |
402 | struct klist klist_children; |
403 | struct klist_node knode_parent; /* node in sibling list */ | |
94e7b1c5 | 404 | struct klist_node knode_driver; |
465c7a3a | 405 | struct klist_node knode_bus; |
49a4ec18 | 406 | struct device *parent; |
1da177e4 LT |
407 | |
408 | struct kobject kobj; | |
409 | char bus_id[BUS_ID_SIZE]; /* position on parent bus */ | |
f9f852df | 410 | struct device_type *type; |
f2eaae19 | 411 | unsigned is_registered:1; |
49a4ec18 | 412 | unsigned uevent_suppress:1; |
1da177e4 | 413 | |
af70316a PM |
414 | struct semaphore sem; /* semaphore to synchronize calls to |
415 | * its driver. | |
416 | */ | |
417 | ||
1da177e4 LT |
418 | struct bus_type * bus; /* type of bus device is on */ |
419 | struct device_driver *driver; /* which driver has allocated this | |
420 | device */ | |
421 | void *driver_data; /* data private to the driver */ | |
4e10d12a DSL |
422 | void *platform_data; /* Platform specific data, device |
423 | core doesn't touch it */ | |
1da177e4 LT |
424 | struct dev_pm_info power; |
425 | ||
87348136 CH |
426 | #ifdef CONFIG_NUMA |
427 | int numa_node; /* NUMA node this device is close to */ | |
428 | #endif | |
1da177e4 LT |
429 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
430 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
431 | alloc_coherent mappings as | |
432 | not all hardware supports | |
433 | 64 bit addresses for consistent | |
434 | allocations such descriptors. */ | |
435 | ||
436 | struct list_head dma_pools; /* dma pools (if dma'ble) */ | |
437 | ||
438 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
439 | override */ | |
c6dbaef2 BH |
440 | /* arch specific additions */ |
441 | struct dev_archdata archdata; | |
1da177e4 | 442 | |
9ac7849e TH |
443 | spinlock_t devres_lock; |
444 | struct list_head devres_head; | |
445 | ||
23681e47 GKH |
446 | /* class_device migration path */ |
447 | struct list_head node; | |
b7a3e813 | 448 | struct class *class; |
23681e47 | 449 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
de0ff00d | 450 | struct attribute_group **groups; /* optional groups */ |
23681e47 | 451 | |
1da177e4 LT |
452 | void (*release)(struct device * dev); |
453 | }; | |
454 | ||
87348136 CH |
455 | #ifdef CONFIG_NUMA |
456 | static inline int dev_to_node(struct device *dev) | |
457 | { | |
458 | return dev->numa_node; | |
459 | } | |
460 | static inline void set_dev_node(struct device *dev, int node) | |
461 | { | |
462 | dev->numa_node = node; | |
463 | } | |
464 | #else | |
465 | static inline int dev_to_node(struct device *dev) | |
466 | { | |
467 | return -1; | |
468 | } | |
469 | static inline void set_dev_node(struct device *dev, int node) | |
470 | { | |
471 | } | |
472 | #endif | |
473 | ||
1da177e4 LT |
474 | static inline void * |
475 | dev_get_drvdata (struct device *dev) | |
476 | { | |
477 | return dev->driver_data; | |
478 | } | |
479 | ||
480 | static inline void | |
481 | dev_set_drvdata (struct device *dev, void *data) | |
482 | { | |
483 | dev->driver_data = data; | |
484 | } | |
485 | ||
d305ef5d DR |
486 | static inline int device_is_registered(struct device *dev) |
487 | { | |
f2eaae19 | 488 | return dev->is_registered; |
d305ef5d DR |
489 | } |
490 | ||
1f21782e AB |
491 | void driver_init(void); |
492 | ||
1da177e4 LT |
493 | /* |
494 | * High level routines for use by the bus drivers | |
495 | */ | |
4a7fb636 | 496 | extern int __must_check device_register(struct device * dev); |
1da177e4 LT |
497 | extern void device_unregister(struct device * dev); |
498 | extern void device_initialize(struct device * dev); | |
4a7fb636 | 499 | extern int __must_check device_add(struct device * dev); |
1da177e4 | 500 | extern void device_del(struct device * dev); |
04fed361 | 501 | extern int device_for_each_child(struct device *, void *, |
1da177e4 | 502 | int (*fn)(struct device *, void *)); |
5ab69981 CH |
503 | extern struct device *device_find_child(struct device *, void *data, |
504 | int (*match)(struct device *, void *)); | |
a2de48ca | 505 | extern int device_rename(struct device *dev, char *new_name); |
8a82472f | 506 | extern int device_move(struct device *dev, struct device *new_parent); |
1da177e4 LT |
507 | |
508 | /* | |
509 | * Manual binding of a device to driver. See drivers/base/bus.c | |
510 | * for information on use. | |
511 | */ | |
f86db396 | 512 | extern int __must_check device_bind_driver(struct device *dev); |
1da177e4 | 513 | extern void device_release_driver(struct device * dev); |
4a7fb636 | 514 | extern int __must_check device_attach(struct device * dev); |
f86db396 AM |
515 | extern int __must_check driver_attach(struct device_driver *drv); |
516 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 517 | |
23681e47 GKH |
518 | /* |
519 | * Easy functions for dynamically creating devices on the fly | |
520 | */ | |
521 | extern struct device *device_create(struct class *cls, struct device *parent, | |
5cbe5f8a | 522 | dev_t devt, const char *fmt, ...) |
23681e47 GKH |
523 | __attribute__((format(printf,4,5))); |
524 | extern void device_destroy(struct class *cls, dev_t devt); | |
775b64d2 RW |
525 | #ifdef CONFIG_PM_SLEEP |
526 | extern void destroy_suspended_device(struct class *cls, dev_t devt); | |
527 | #else /* !CONFIG_PM_SLEEP */ | |
528 | static inline void destroy_suspended_device(struct class *cls, dev_t devt) | |
529 | { | |
530 | device_destroy(cls, devt); | |
531 | } | |
532 | #endif /* !CONFIG_PM_SLEEP */ | |
1da177e4 | 533 | |
1da177e4 LT |
534 | /* |
535 | * Platform "fixup" functions - allow the platform to have their say | |
536 | * about devices and actions that the general device layer doesn't | |
537 | * know about. | |
538 | */ | |
539 | /* Notify platform of device discovery */ | |
540 | extern int (*platform_notify)(struct device * dev); | |
541 | ||
542 | extern int (*platform_notify_remove)(struct device * dev); | |
543 | ||
544 | ||
545 | /** | |
546 | * get_device - atomically increment the reference count for the device. | |
547 | * | |
548 | */ | |
549 | extern struct device * get_device(struct device * dev); | |
550 | extern void put_device(struct device * dev); | |
1da177e4 LT |
551 | |
552 | ||
116f232b | 553 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
554 | extern void device_shutdown(void); |
555 | ||
58b3b71d RW |
556 | /* drivers/base/sys.c */ |
557 | extern void sysdev_shutdown(void); | |
558 | ||
1da177e4 | 559 | /* debugging and troubleshooting/diagnostic helpers. */ |
3e95637a | 560 | extern const char *dev_driver_string(struct device *dev); |
1da177e4 | 561 | #define dev_printk(level, dev, format, arg...) \ |
3e95637a | 562 | printk(level "%s %s: " format , dev_driver_string(dev) , (dev)->bus_id , ## arg) |
1da177e4 | 563 | |
7b8712e5 EM |
564 | #define dev_emerg(dev, format, arg...) \ |
565 | dev_printk(KERN_EMERG , dev , format , ## arg) | |
566 | #define dev_alert(dev, format, arg...) \ | |
567 | dev_printk(KERN_ALERT , dev , format , ## arg) | |
568 | #define dev_crit(dev, format, arg...) \ | |
569 | dev_printk(KERN_CRIT , dev , format , ## arg) | |
570 | #define dev_err(dev, format, arg...) \ | |
571 | dev_printk(KERN_ERR , dev , format , ## arg) | |
572 | #define dev_warn(dev, format, arg...) \ | |
573 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
574 | #define dev_notice(dev, format, arg...) \ | |
575 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
576 | #define dev_info(dev, format, arg...) \ | |
577 | dev_printk(KERN_INFO , dev , format , ## arg) | |
578 | ||
1da177e4 LT |
579 | #ifdef DEBUG |
580 | #define dev_dbg(dev, format, arg...) \ | |
581 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
582 | #else | |
404d5b18 DW |
583 | static inline int __attribute__ ((format (printf, 2, 3))) |
584 | dev_dbg(struct device * dev, const char * fmt, ...) | |
585 | { | |
586 | return 0; | |
587 | } | |
1da177e4 LT |
588 | #endif |
589 | ||
aebdc3b4 DB |
590 | #ifdef VERBOSE_DEBUG |
591 | #define dev_vdbg dev_dbg | |
592 | #else | |
593 | static inline int __attribute__ ((format (printf, 2, 3))) | |
594 | dev_vdbg(struct device * dev, const char * fmt, ...) | |
595 | { | |
596 | return 0; | |
597 | } | |
598 | #endif | |
599 | ||
1da177e4 LT |
600 | /* Create alias, so I can be autoloaded. */ |
601 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
602 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
603 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
604 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
605 | #endif /* _DEVICE_H_ */ |