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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> |
d2a3b914 | 19 | #include <linux/lockdep.h> |
4a7fb636 | 20 | #include <linux/compiler.h> |
1da177e4 LT |
21 | #include <linux/types.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/pm.h> | |
6188e10d | 24 | #include <linux/semaphore.h> |
1da177e4 | 25 | #include <asm/atomic.h> |
c6dbaef2 | 26 | #include <asm/device.h> |
1da177e4 | 27 | |
aab0de24 | 28 | #define BUS_ID_SIZE 20 |
1da177e4 | 29 | |
1da177e4 | 30 | struct device; |
2831fe6f | 31 | struct device_private; |
1da177e4 | 32 | struct device_driver; |
e5dd1278 | 33 | struct driver_private; |
1da177e4 | 34 | struct class; |
7c71448b | 35 | struct class_private; |
b8c5cec2 | 36 | struct bus_type; |
c6f7e72a | 37 | struct bus_type_private; |
b8c5cec2 KS |
38 | |
39 | struct bus_attribute { | |
40 | struct attribute attr; | |
d462943a GKH |
41 | ssize_t (*show)(struct bus_type *bus, char *buf); |
42 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); | |
b8c5cec2 KS |
43 | }; |
44 | ||
d462943a GKH |
45 | #define BUS_ATTR(_name, _mode, _show, _store) \ |
46 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
b8c5cec2 KS |
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 { | |
d462943a GKH |
53 | const char *name; |
54 | struct bus_attribute *bus_attrs; | |
55 | struct device_attribute *dev_attrs; | |
56 | struct driver_attribute *drv_attrs; | |
57 | ||
58 | int (*match)(struct device *dev, struct device_driver *drv); | |
59 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
60 | int (*probe)(struct device *dev); | |
61 | int (*remove)(struct device *dev); | |
62 | void (*shutdown)(struct device *dev); | |
63 | ||
64 | int (*suspend)(struct device *dev, pm_message_t state); | |
65 | int (*suspend_late)(struct device *dev, pm_message_t state); | |
66 | int (*resume_early)(struct device *dev); | |
67 | int (*resume)(struct device *dev); | |
b8c5cec2 | 68 | |
adf09493 | 69 | struct dev_pm_ops *pm; |
1eede070 | 70 | |
c6f7e72a | 71 | struct bus_type_private *p; |
1da177e4 LT |
72 | }; |
73 | ||
d462943a GKH |
74 | extern int __must_check bus_register(struct bus_type *bus); |
75 | extern void bus_unregister(struct bus_type *bus); | |
1da177e4 | 76 | |
d462943a | 77 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
1da177e4 | 78 | |
1da177e4 LT |
79 | /* iterator helpers for buses */ |
80 | ||
d462943a GKH |
81 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
82 | int (*fn)(struct device *dev, void *data)); | |
83 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
84 | void *data, | |
85 | int (*match)(struct device *dev, void *data)); | |
1f9ffc04 GKH |
86 | struct device *bus_find_device_by_name(struct bus_type *bus, |
87 | struct device *start, | |
88 | const char *name); | |
1da177e4 | 89 | |
4a7fb636 | 90 | int __must_check bus_for_each_drv(struct bus_type *bus, |
d462943a GKH |
91 | struct device_driver *start, void *data, |
92 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 93 | |
99178b03 GKH |
94 | void bus_sort_breadthfirst(struct bus_type *bus, |
95 | int (*compare)(const struct device *a, | |
96 | const struct device *b)); | |
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 | 120 | extern struct kset *bus_get_kset(struct bus_type *bus); |
b249072e | 121 | extern struct klist *bus_get_device_klist(struct bus_type *bus); |
0fed80f7 | 122 | |
1da177e4 | 123 | struct device_driver { |
e5dd1278 GKH |
124 | const char *name; |
125 | struct bus_type *bus; | |
1da177e4 | 126 | |
e5dd1278 GKH |
127 | struct module *owner; |
128 | const char *mod_name; /* used for built-in modules */ | |
1da177e4 | 129 | |
d462943a GKH |
130 | int (*probe) (struct device *dev); |
131 | int (*remove) (struct device *dev); | |
132 | void (*shutdown) (struct device *dev); | |
133 | int (*suspend) (struct device *dev, pm_message_t state); | |
134 | int (*resume) (struct device *dev); | |
57c74534 | 135 | struct attribute_group **groups; |
e5dd1278 | 136 | |
adf09493 | 137 | struct dev_pm_ops *pm; |
1eede070 | 138 | |
e5dd1278 | 139 | struct driver_private *p; |
1da177e4 LT |
140 | }; |
141 | ||
142 | ||
d462943a GKH |
143 | extern int __must_check driver_register(struct device_driver *drv); |
144 | extern void driver_unregister(struct device_driver *drv); | |
1da177e4 | 145 | |
d462943a GKH |
146 | extern struct device_driver *get_driver(struct device_driver *drv); |
147 | extern void put_driver(struct device_driver *drv); | |
148 | extern struct device_driver *driver_find(const char *name, | |
149 | struct bus_type *bus); | |
d779249e | 150 | extern int driver_probe_done(void); |
1da177e4 | 151 | |
405ae7d3 | 152 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
153 | |
154 | struct driver_attribute { | |
d462943a GKH |
155 | struct attribute attr; |
156 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
157 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
158 | size_t count); | |
1da177e4 LT |
159 | }; |
160 | ||
d462943a GKH |
161 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
162 | struct driver_attribute driver_attr_##_name = \ | |
163 | __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 164 | |
d462943a GKH |
165 | extern int __must_check driver_create_file(struct device_driver *driver, |
166 | struct driver_attribute *attr); | |
167 | extern void driver_remove_file(struct device_driver *driver, | |
168 | struct driver_attribute *attr); | |
1da177e4 | 169 | |
cbe9c595 GKH |
170 | extern int __must_check driver_add_kobj(struct device_driver *drv, |
171 | struct kobject *kobj, | |
172 | const char *fmt, ...); | |
173 | ||
d462943a GKH |
174 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
175 | struct device *start, | |
176 | void *data, | |
177 | int (*fn)(struct device *dev, | |
178 | void *)); | |
179 | struct device *driver_find_device(struct device_driver *drv, | |
180 | struct device *start, void *data, | |
181 | int (*match)(struct device *dev, void *data)); | |
fae3cd00 | 182 | |
1da177e4 LT |
183 | /* |
184 | * device classes | |
185 | */ | |
186 | struct class { | |
d462943a GKH |
187 | const char *name; |
188 | struct module *owner; | |
1da177e4 | 189 | |
d462943a | 190 | struct class_attribute *class_attrs; |
d462943a | 191 | struct device_attribute *dev_attrs; |
e105b8bf | 192 | struct kobject *dev_kobj; |
1da177e4 | 193 | |
d462943a | 194 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
1da177e4 | 195 | |
d462943a GKH |
196 | void (*class_release)(struct class *class); |
197 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 198 | |
d462943a GKH |
199 | int (*suspend)(struct device *dev, pm_message_t state); |
200 | int (*resume)(struct device *dev); | |
1eede070 | 201 | |
adf09493 | 202 | struct dev_pm_ops *pm; |
7c71448b | 203 | struct class_private *p; |
1da177e4 LT |
204 | }; |
205 | ||
5a3ceb86 TH |
206 | struct class_dev_iter { |
207 | struct klist_iter ki; | |
208 | const struct device_type *type; | |
209 | }; | |
210 | ||
e105b8bf DW |
211 | extern struct kobject *sysfs_dev_block_kobj; |
212 | extern struct kobject *sysfs_dev_char_kobj; | |
d2a3b914 MW |
213 | extern int __must_check __class_register(struct class *class, |
214 | struct lock_class_key *key); | |
d462943a | 215 | extern void class_unregister(struct class *class); |
d2a3b914 MW |
216 | |
217 | /* This is a #define to keep the compiler from merging different | |
218 | * instances of the __key variable */ | |
219 | #define class_register(class) \ | |
220 | ({ \ | |
221 | static struct lock_class_key __key; \ | |
222 | __class_register(class, &__key); \ | |
223 | }) | |
224 | ||
5a3ceb86 TH |
225 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
226 | struct class *class, | |
227 | struct device *start, | |
228 | const struct device_type *type); | |
229 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
230 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
231 | ||
93562b53 GKH |
232 | extern int class_for_each_device(struct class *class, struct device *start, |
233 | void *data, | |
fd04897b | 234 | int (*fn)(struct device *dev, void *data)); |
695794ae GKH |
235 | extern struct device *class_find_device(struct class *class, |
236 | struct device *start, void *data, | |
fd04897b | 237 | int (*match)(struct device *, void *)); |
1da177e4 LT |
238 | |
239 | struct class_attribute { | |
d462943a GKH |
240 | struct attribute attr; |
241 | ssize_t (*show)(struct class *class, char *buf); | |
242 | ssize_t (*store)(struct class *class, const char *buf, size_t count); | |
1da177e4 LT |
243 | }; |
244 | ||
d462943a GKH |
245 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
246 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 247 | |
d462943a GKH |
248 | extern int __must_check class_create_file(struct class *class, |
249 | const struct class_attribute *attr); | |
250 | extern void class_remove_file(struct class *class, | |
251 | const struct class_attribute *attr); | |
1da177e4 | 252 | |
1da177e4 LT |
253 | struct class_interface { |
254 | struct list_head node; | |
255 | struct class *class; | |
256 | ||
c47ed219 GKH |
257 | int (*add_dev) (struct device *, struct class_interface *); |
258 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
259 | }; |
260 | ||
4a7fb636 | 261 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
262 | extern void class_interface_unregister(struct class_interface *); |
263 | ||
d2a3b914 MW |
264 | extern struct class * __must_check __class_create(struct module *owner, |
265 | const char *name, | |
266 | struct lock_class_key *key); | |
e9ba6365 | 267 | extern void class_destroy(struct class *cls); |
e9ba6365 | 268 | |
d2a3b914 MW |
269 | /* This is a #define to keep the compiler from merging different |
270 | * instances of the __key variable */ | |
271 | #define class_create(owner, name) \ | |
272 | ({ \ | |
273 | static struct lock_class_key __key; \ | |
274 | __class_create(owner, name, &__key); \ | |
275 | }) | |
276 | ||
414264f9 KS |
277 | /* |
278 | * The type of device, "struct device" is embedded in. A class | |
279 | * or bus can contain devices of different types | |
280 | * like "partitions" and "disks", "mouse" and "event". | |
281 | * This identifies the device type and carries type-specific | |
282 | * information, equivalent to the kobj_type of a kobject. | |
283 | * If "name" is specified, the uevent will contain it in | |
284 | * the DEVTYPE variable. | |
285 | */ | |
f9f852df | 286 | struct device_type { |
414264f9 | 287 | const char *name; |
621a1672 | 288 | struct attribute_group **groups; |
7eff2e7a | 289 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
f9f852df | 290 | void (*release)(struct device *dev); |
1eede070 | 291 | |
d462943a GKH |
292 | int (*suspend)(struct device *dev, pm_message_t state); |
293 | int (*resume)(struct device *dev); | |
1eede070 | 294 | |
adf09493 | 295 | struct dev_pm_ops *pm; |
f9f852df KS |
296 | }; |
297 | ||
a7fd6706 KS |
298 | /* interface for exporting device attributes */ |
299 | struct device_attribute { | |
300 | struct attribute attr; | |
301 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
302 | char *buf); | |
303 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
304 | const char *buf, size_t count); | |
305 | }; | |
306 | ||
d462943a GKH |
307 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
308 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
a7fd6706 | 309 | |
4a7fb636 | 310 | extern int __must_check device_create_file(struct device *device, |
d462943a GKH |
311 | struct device_attribute *entry); |
312 | extern void device_remove_file(struct device *dev, | |
313 | struct device_attribute *attr); | |
2589f188 GKH |
314 | extern int __must_check device_create_bin_file(struct device *dev, |
315 | struct bin_attribute *attr); | |
316 | extern void device_remove_bin_file(struct device *dev, | |
317 | struct bin_attribute *attr); | |
523ded71 | 318 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 319 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
320 | |
321 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
322 | #define device_schedule_callback(dev, func) \ | |
323 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
324 | |
325 | /* device resource management */ | |
326 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
327 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
328 | ||
329 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 330 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
331 | const char *name); |
332 | #define devres_alloc(release, size, gfp) \ | |
333 | __devres_alloc(release, size, gfp, #release) | |
334 | #else | |
d462943a | 335 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e TH |
336 | #endif |
337 | extern void devres_free(void *res); | |
338 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 339 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 340 | dr_match_t match, void *match_data); |
d462943a GKH |
341 | extern void *devres_get(struct device *dev, void *new_res, |
342 | dr_match_t match, void *match_data); | |
343 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
344 | dr_match_t match, void *match_data); | |
9ac7849e TH |
345 | extern int devres_destroy(struct device *dev, dr_release_t release, |
346 | dr_match_t match, void *match_data); | |
347 | ||
348 | /* devres group */ | |
349 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
350 | gfp_t gfp); | |
351 | extern void devres_close_group(struct device *dev, void *id); | |
352 | extern void devres_remove_group(struct device *dev, void *id); | |
353 | extern int devres_release_group(struct device *dev, void *id); | |
354 | ||
355 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
356 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
357 | extern void devm_kfree(struct device *dev, void *p); | |
358 | ||
6b7b6510 FT |
359 | struct device_dma_parameters { |
360 | /* | |
361 | * a low level driver may set these to teach IOMMU code about | |
362 | * sg limitations. | |
363 | */ | |
364 | unsigned int max_segment_size; | |
365 | unsigned long segment_boundary_mask; | |
366 | }; | |
367 | ||
1da177e4 | 368 | struct device { |
94e7b1c5 | 369 | struct klist_node knode_driver; |
465c7a3a | 370 | struct klist_node knode_bus; |
49a4ec18 | 371 | struct device *parent; |
1da177e4 | 372 | |
2831fe6f GKH |
373 | struct device_private *p; |
374 | ||
1da177e4 LT |
375 | struct kobject kobj; |
376 | char bus_id[BUS_ID_SIZE]; /* position on parent bus */ | |
929d2fa5 | 377 | unsigned uevent_suppress:1; |
c906a48a | 378 | const char *init_name; /* initial name of the device */ |
f9f852df | 379 | struct device_type *type; |
1da177e4 | 380 | |
af70316a PM |
381 | struct semaphore sem; /* semaphore to synchronize calls to |
382 | * its driver. | |
383 | */ | |
384 | ||
d462943a | 385 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
386 | struct device_driver *driver; /* which driver has allocated this |
387 | device */ | |
388 | void *driver_data; /* data private to the driver */ | |
4e10d12a DSL |
389 | void *platform_data; /* Platform specific data, device |
390 | core doesn't touch it */ | |
1da177e4 LT |
391 | struct dev_pm_info power; |
392 | ||
87348136 CH |
393 | #ifdef CONFIG_NUMA |
394 | int numa_node; /* NUMA node this device is close to */ | |
395 | #endif | |
1da177e4 LT |
396 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
397 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
398 | alloc_coherent mappings as | |
399 | not all hardware supports | |
400 | 64 bit addresses for consistent | |
401 | allocations such descriptors. */ | |
402 | ||
6b7b6510 FT |
403 | struct device_dma_parameters *dma_parms; |
404 | ||
1da177e4 LT |
405 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
406 | ||
407 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
408 | override */ | |
c6dbaef2 BH |
409 | /* arch specific additions */ |
410 | struct dev_archdata archdata; | |
1da177e4 | 411 | |
929d2fa5 MW |
412 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
413 | ||
9ac7849e TH |
414 | spinlock_t devres_lock; |
415 | struct list_head devres_head; | |
416 | ||
5a3ceb86 | 417 | struct klist_node knode_class; |
b7a3e813 | 418 | struct class *class; |
de0ff00d | 419 | struct attribute_group **groups; /* optional groups */ |
23681e47 | 420 | |
d462943a | 421 | void (*release)(struct device *dev); |
1da177e4 LT |
422 | }; |
423 | ||
9a3df1f7 AS |
424 | /* Get the wakeup routines, which depend on struct device */ |
425 | #include <linux/pm_wakeup.h> | |
426 | ||
bf9ca69f | 427 | static inline const char *dev_name(const struct device *dev) |
06916639 KS |
428 | { |
429 | /* will be changed into kobject_name(&dev->kobj) in the near future */ | |
430 | return dev->bus_id; | |
431 | } | |
432 | ||
413c239f SR |
433 | extern int dev_set_name(struct device *dev, const char *name, ...) |
434 | __attribute__((format(printf, 2, 3))); | |
435 | ||
87348136 CH |
436 | #ifdef CONFIG_NUMA |
437 | static inline int dev_to_node(struct device *dev) | |
438 | { | |
439 | return dev->numa_node; | |
440 | } | |
441 | static inline void set_dev_node(struct device *dev, int node) | |
442 | { | |
443 | dev->numa_node = node; | |
444 | } | |
445 | #else | |
446 | static inline int dev_to_node(struct device *dev) | |
447 | { | |
448 | return -1; | |
449 | } | |
450 | static inline void set_dev_node(struct device *dev, int node) | |
451 | { | |
452 | } | |
453 | #endif | |
454 | ||
7d1d8999 | 455 | static inline void *dev_get_drvdata(const struct device *dev) |
1da177e4 LT |
456 | { |
457 | return dev->driver_data; | |
458 | } | |
459 | ||
d462943a | 460 | static inline void dev_set_drvdata(struct device *dev, void *data) |
1da177e4 LT |
461 | { |
462 | dev->driver_data = data; | |
463 | } | |
464 | ||
d305ef5d DR |
465 | static inline int device_is_registered(struct device *dev) |
466 | { | |
3f62e570 | 467 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
468 | } |
469 | ||
1f21782e AB |
470 | void driver_init(void); |
471 | ||
1da177e4 LT |
472 | /* |
473 | * High level routines for use by the bus drivers | |
474 | */ | |
d462943a GKH |
475 | extern int __must_check device_register(struct device *dev); |
476 | extern void device_unregister(struct device *dev); | |
477 | extern void device_initialize(struct device *dev); | |
478 | extern int __must_check device_add(struct device *dev); | |
479 | extern void device_del(struct device *dev); | |
480 | extern int device_for_each_child(struct device *dev, void *data, | |
481 | int (*fn)(struct device *dev, void *data)); | |
482 | extern struct device *device_find_child(struct device *dev, void *data, | |
483 | int (*match)(struct device *dev, void *data)); | |
a2de48ca | 484 | extern int device_rename(struct device *dev, char *new_name); |
8a82472f | 485 | extern int device_move(struct device *dev, struct device *new_parent); |
1da177e4 LT |
486 | |
487 | /* | |
488 | * Manual binding of a device to driver. See drivers/base/bus.c | |
489 | * for information on use. | |
490 | */ | |
f86db396 | 491 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
492 | extern void device_release_driver(struct device *dev); |
493 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
494 | extern int __must_check driver_attach(struct device_driver *drv); |
495 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 496 | |
23681e47 GKH |
497 | /* |
498 | * Easy functions for dynamically creating devices on the fly | |
499 | */ | |
8882b394 GKH |
500 | extern struct device *device_create_vargs(struct class *cls, |
501 | struct device *parent, | |
502 | dev_t devt, | |
503 | void *drvdata, | |
504 | const char *fmt, | |
505 | va_list vargs); | |
4e106739 GKH |
506 | extern struct device *device_create(struct class *cls, struct device *parent, |
507 | dev_t devt, void *drvdata, | |
508 | const char *fmt, ...) | |
8882b394 | 509 | __attribute__((format(printf, 5, 6))); |
23681e47 | 510 | extern void device_destroy(struct class *cls, dev_t devt); |
1da177e4 | 511 | |
1da177e4 LT |
512 | /* |
513 | * Platform "fixup" functions - allow the platform to have their say | |
514 | * about devices and actions that the general device layer doesn't | |
515 | * know about. | |
516 | */ | |
517 | /* Notify platform of device discovery */ | |
d462943a | 518 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 519 | |
d462943a | 520 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
521 | |
522 | ||
523 | /** | |
524 | * get_device - atomically increment the reference count for the device. | |
525 | * | |
526 | */ | |
d462943a GKH |
527 | extern struct device *get_device(struct device *dev); |
528 | extern void put_device(struct device *dev); | |
1da177e4 LT |
529 | |
530 | ||
116f232b | 531 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
532 | extern void device_shutdown(void); |
533 | ||
58b3b71d RW |
534 | /* drivers/base/sys.c */ |
535 | extern void sysdev_shutdown(void); | |
536 | ||
1da177e4 | 537 | /* debugging and troubleshooting/diagnostic helpers. */ |
bf9ca69f | 538 | extern const char *dev_driver_string(const struct device *dev); |
1da177e4 | 539 | #define dev_printk(level, dev, format, arg...) \ |
d462943a | 540 | printk(level "%s %s: " format , dev_driver_string(dev) , \ |
06916639 | 541 | dev_name(dev) , ## arg) |
1da177e4 | 542 | |
7b8712e5 EM |
543 | #define dev_emerg(dev, format, arg...) \ |
544 | dev_printk(KERN_EMERG , dev , format , ## arg) | |
545 | #define dev_alert(dev, format, arg...) \ | |
546 | dev_printk(KERN_ALERT , dev , format , ## arg) | |
547 | #define dev_crit(dev, format, arg...) \ | |
548 | dev_printk(KERN_CRIT , dev , format , ## arg) | |
549 | #define dev_err(dev, format, arg...) \ | |
550 | dev_printk(KERN_ERR , dev , format , ## arg) | |
551 | #define dev_warn(dev, format, arg...) \ | |
552 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
553 | #define dev_notice(dev, format, arg...) \ | |
554 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
555 | #define dev_info(dev, format, arg...) \ | |
556 | dev_printk(KERN_INFO , dev , format , ## arg) | |
557 | ||
346e15be JB |
558 | #if defined(CONFIG_DYNAMIC_PRINTK_DEBUG) |
559 | #define dev_dbg(dev, format, ...) do { \ | |
560 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ | |
561 | } while (0) | |
562 | #elif defined(DEBUG) | |
1da177e4 LT |
563 | #define dev_dbg(dev, format, arg...) \ |
564 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
565 | #else | |
1429db83 JP |
566 | #define dev_dbg(dev, format, arg...) \ |
567 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
1da177e4 LT |
568 | #endif |
569 | ||
aebdc3b4 DB |
570 | #ifdef VERBOSE_DEBUG |
571 | #define dev_vdbg dev_dbg | |
572 | #else | |
1429db83 JP |
573 | |
574 | #define dev_vdbg(dev, format, arg...) \ | |
575 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
aebdc3b4 DB |
576 | #endif |
577 | ||
e6139662 AV |
578 | /* |
579 | * dev_WARN() acts like dev_printk(), but with the key difference | |
580 | * of using a WARN/WARN_ON to get the message out, including the | |
581 | * file/line information and a backtrace. | |
582 | */ | |
583 | #define dev_WARN(dev, format, arg...) \ | |
584 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
585 | ||
1da177e4 LT |
586 | /* Create alias, so I can be autoloaded. */ |
587 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
588 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
589 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
590 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
591 | #endif /* _DEVICE_H_ */ |