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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 LT |
30 | struct device; |
31 | struct device_driver; | |
e5dd1278 | 32 | struct driver_private; |
1da177e4 | 33 | struct class; |
7c71448b | 34 | struct class_private; |
b8c5cec2 | 35 | struct bus_type; |
c6f7e72a | 36 | struct bus_type_private; |
b8c5cec2 KS |
37 | |
38 | struct bus_attribute { | |
39 | struct attribute attr; | |
d462943a GKH |
40 | ssize_t (*show)(struct bus_type *bus, char *buf); |
41 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); | |
b8c5cec2 KS |
42 | }; |
43 | ||
d462943a GKH |
44 | #define BUS_ATTR(_name, _mode, _show, _store) \ |
45 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
b8c5cec2 KS |
46 | |
47 | extern int __must_check bus_create_file(struct bus_type *, | |
48 | struct bus_attribute *); | |
49 | extern void bus_remove_file(struct bus_type *, struct bus_attribute *); | |
1da177e4 LT |
50 | |
51 | struct bus_type { | |
d462943a GKH |
52 | const char *name; |
53 | struct bus_attribute *bus_attrs; | |
54 | struct device_attribute *dev_attrs; | |
55 | struct driver_attribute *drv_attrs; | |
56 | ||
57 | int (*match)(struct device *dev, struct device_driver *drv); | |
58 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
59 | int (*probe)(struct device *dev); | |
60 | int (*remove)(struct device *dev); | |
61 | void (*shutdown)(struct device *dev); | |
62 | ||
63 | int (*suspend)(struct device *dev, pm_message_t state); | |
64 | int (*suspend_late)(struct device *dev, pm_message_t state); | |
65 | int (*resume_early)(struct device *dev); | |
66 | int (*resume)(struct device *dev); | |
b8c5cec2 | 67 | |
adf09493 | 68 | struct dev_pm_ops *pm; |
1eede070 | 69 | |
c6f7e72a | 70 | struct bus_type_private *p; |
1da177e4 LT |
71 | }; |
72 | ||
d462943a GKH |
73 | extern int __must_check bus_register(struct bus_type *bus); |
74 | extern void bus_unregister(struct bus_type *bus); | |
1da177e4 | 75 | |
d462943a | 76 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
1da177e4 | 77 | |
1da177e4 LT |
78 | /* iterator helpers for buses */ |
79 | ||
d462943a GKH |
80 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
81 | int (*fn)(struct device *dev, void *data)); | |
82 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
83 | void *data, | |
84 | int (*match)(struct device *dev, void *data)); | |
1f9ffc04 GKH |
85 | struct device *bus_find_device_by_name(struct bus_type *bus, |
86 | struct device *start, | |
87 | const char *name); | |
1da177e4 | 88 | |
4a7fb636 | 89 | int __must_check bus_for_each_drv(struct bus_type *bus, |
d462943a GKH |
90 | struct device_driver *start, void *data, |
91 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 92 | |
99178b03 GKH |
93 | void bus_sort_breadthfirst(struct bus_type *bus, |
94 | int (*compare)(const struct device *a, | |
95 | const struct device *b)); | |
116af378 BH |
96 | /* |
97 | * Bus notifiers: Get notified of addition/removal of devices | |
98 | * and binding/unbinding of drivers to devices. | |
99 | * In the long run, it should be a replacement for the platform | |
100 | * notify hooks. | |
101 | */ | |
102 | struct notifier_block; | |
103 | ||
104 | extern int bus_register_notifier(struct bus_type *bus, | |
105 | struct notifier_block *nb); | |
106 | extern int bus_unregister_notifier(struct bus_type *bus, | |
107 | struct notifier_block *nb); | |
108 | ||
109 | /* All 4 notifers below get called with the target struct device * | |
110 | * as an argument. Note that those functions are likely to be called | |
111 | * with the device semaphore held in the core, so be careful. | |
112 | */ | |
113 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
114 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
115 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
116 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
117 | unbound */ | |
118 | ||
0fed80f7 | 119 | extern struct kset *bus_get_kset(struct bus_type *bus); |
b249072e | 120 | extern struct klist *bus_get_device_klist(struct bus_type *bus); |
0fed80f7 | 121 | |
1da177e4 | 122 | struct device_driver { |
e5dd1278 GKH |
123 | const char *name; |
124 | struct bus_type *bus; | |
1da177e4 | 125 | |
e5dd1278 GKH |
126 | struct module *owner; |
127 | const char *mod_name; /* used for built-in modules */ | |
1da177e4 | 128 | |
d462943a GKH |
129 | int (*probe) (struct device *dev); |
130 | int (*remove) (struct device *dev); | |
131 | void (*shutdown) (struct device *dev); | |
132 | int (*suspend) (struct device *dev, pm_message_t state); | |
133 | int (*resume) (struct device *dev); | |
57c74534 | 134 | struct attribute_group **groups; |
e5dd1278 | 135 | |
adf09493 | 136 | struct dev_pm_ops *pm; |
1eede070 | 137 | |
e5dd1278 | 138 | struct driver_private *p; |
1da177e4 LT |
139 | }; |
140 | ||
141 | ||
d462943a GKH |
142 | extern int __must_check driver_register(struct device_driver *drv); |
143 | extern void driver_unregister(struct device_driver *drv); | |
1da177e4 | 144 | |
d462943a GKH |
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, | |
148 | struct bus_type *bus); | |
d779249e | 149 | extern int driver_probe_done(void); |
216773a7 AV |
150 | extern int wait_for_device_probe(void); |
151 | ||
1da177e4 | 152 | |
405ae7d3 | 153 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
154 | |
155 | struct driver_attribute { | |
d462943a GKH |
156 | struct attribute attr; |
157 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
158 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
159 | size_t count); | |
1da177e4 LT |
160 | }; |
161 | ||
d462943a GKH |
162 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
163 | struct driver_attribute driver_attr_##_name = \ | |
164 | __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 165 | |
d462943a GKH |
166 | extern int __must_check driver_create_file(struct device_driver *driver, |
167 | struct driver_attribute *attr); | |
168 | extern void driver_remove_file(struct device_driver *driver, | |
169 | struct driver_attribute *attr); | |
1da177e4 | 170 | |
cbe9c595 GKH |
171 | extern int __must_check driver_add_kobj(struct device_driver *drv, |
172 | struct kobject *kobj, | |
173 | const char *fmt, ...); | |
174 | ||
d462943a GKH |
175 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
176 | struct device *start, | |
177 | void *data, | |
178 | int (*fn)(struct device *dev, | |
179 | void *)); | |
180 | struct device *driver_find_device(struct device_driver *drv, | |
181 | struct device *start, void *data, | |
182 | int (*match)(struct device *dev, void *data)); | |
fae3cd00 | 183 | |
1da177e4 LT |
184 | /* |
185 | * device classes | |
186 | */ | |
187 | struct class { | |
d462943a GKH |
188 | const char *name; |
189 | struct module *owner; | |
1da177e4 | 190 | |
d462943a | 191 | struct class_attribute *class_attrs; |
d462943a | 192 | struct device_attribute *dev_attrs; |
e105b8bf | 193 | struct kobject *dev_kobj; |
1da177e4 | 194 | |
d462943a | 195 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
1da177e4 | 196 | |
d462943a GKH |
197 | void (*class_release)(struct class *class); |
198 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 199 | |
d462943a GKH |
200 | int (*suspend)(struct device *dev, pm_message_t state); |
201 | int (*resume)(struct device *dev); | |
1eede070 | 202 | |
adf09493 | 203 | struct dev_pm_ops *pm; |
7c71448b | 204 | struct class_private *p; |
1da177e4 LT |
205 | }; |
206 | ||
5a3ceb86 TH |
207 | struct class_dev_iter { |
208 | struct klist_iter ki; | |
209 | const struct device_type *type; | |
210 | }; | |
211 | ||
e105b8bf DW |
212 | extern struct kobject *sysfs_dev_block_kobj; |
213 | extern struct kobject *sysfs_dev_char_kobj; | |
d2a3b914 MW |
214 | extern int __must_check __class_register(struct class *class, |
215 | struct lock_class_key *key); | |
d462943a | 216 | extern void class_unregister(struct class *class); |
d2a3b914 MW |
217 | |
218 | /* This is a #define to keep the compiler from merging different | |
219 | * instances of the __key variable */ | |
220 | #define class_register(class) \ | |
221 | ({ \ | |
222 | static struct lock_class_key __key; \ | |
223 | __class_register(class, &__key); \ | |
224 | }) | |
225 | ||
5a3ceb86 TH |
226 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
227 | struct class *class, | |
228 | struct device *start, | |
229 | const struct device_type *type); | |
230 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
231 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
232 | ||
93562b53 GKH |
233 | extern int class_for_each_device(struct class *class, struct device *start, |
234 | void *data, | |
fd04897b | 235 | int (*fn)(struct device *dev, void *data)); |
695794ae GKH |
236 | extern struct device *class_find_device(struct class *class, |
237 | struct device *start, void *data, | |
fd04897b | 238 | int (*match)(struct device *, void *)); |
1da177e4 LT |
239 | |
240 | struct class_attribute { | |
d462943a GKH |
241 | struct attribute attr; |
242 | ssize_t (*show)(struct class *class, char *buf); | |
243 | ssize_t (*store)(struct class *class, const char *buf, size_t count); | |
1da177e4 LT |
244 | }; |
245 | ||
d462943a GKH |
246 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
247 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 248 | |
d462943a GKH |
249 | extern int __must_check class_create_file(struct class *class, |
250 | const struct class_attribute *attr); | |
251 | extern void class_remove_file(struct class *class, | |
252 | const struct class_attribute *attr); | |
1da177e4 | 253 | |
1da177e4 LT |
254 | struct class_interface { |
255 | struct list_head node; | |
256 | struct class *class; | |
257 | ||
c47ed219 GKH |
258 | int (*add_dev) (struct device *, struct class_interface *); |
259 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
260 | }; |
261 | ||
4a7fb636 | 262 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
263 | extern void class_interface_unregister(struct class_interface *); |
264 | ||
d2a3b914 MW |
265 | extern struct class * __must_check __class_create(struct module *owner, |
266 | const char *name, | |
267 | struct lock_class_key *key); | |
e9ba6365 | 268 | extern void class_destroy(struct class *cls); |
e9ba6365 | 269 | |
d2a3b914 MW |
270 | /* This is a #define to keep the compiler from merging different |
271 | * instances of the __key variable */ | |
272 | #define class_create(owner, name) \ | |
273 | ({ \ | |
274 | static struct lock_class_key __key; \ | |
275 | __class_create(owner, name, &__key); \ | |
276 | }) | |
277 | ||
414264f9 KS |
278 | /* |
279 | * The type of device, "struct device" is embedded in. A class | |
280 | * or bus can contain devices of different types | |
281 | * like "partitions" and "disks", "mouse" and "event". | |
282 | * This identifies the device type and carries type-specific | |
283 | * information, equivalent to the kobj_type of a kobject. | |
284 | * If "name" is specified, the uevent will contain it in | |
285 | * the DEVTYPE variable. | |
286 | */ | |
f9f852df | 287 | struct device_type { |
414264f9 | 288 | const char *name; |
621a1672 | 289 | struct attribute_group **groups; |
7eff2e7a | 290 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
f9f852df | 291 | void (*release)(struct device *dev); |
1eede070 | 292 | |
d462943a GKH |
293 | int (*suspend)(struct device *dev, pm_message_t state); |
294 | int (*resume)(struct device *dev); | |
1eede070 | 295 | |
adf09493 | 296 | struct dev_pm_ops *pm; |
f9f852df KS |
297 | }; |
298 | ||
a7fd6706 KS |
299 | /* interface for exporting device attributes */ |
300 | struct device_attribute { | |
301 | struct attribute attr; | |
302 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
303 | char *buf); | |
304 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
305 | const char *buf, size_t count); | |
306 | }; | |
307 | ||
d462943a GKH |
308 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
309 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
a7fd6706 | 310 | |
4a7fb636 | 311 | extern int __must_check device_create_file(struct device *device, |
d462943a GKH |
312 | struct device_attribute *entry); |
313 | extern void device_remove_file(struct device *dev, | |
314 | struct device_attribute *attr); | |
2589f188 GKH |
315 | extern int __must_check device_create_bin_file(struct device *dev, |
316 | struct bin_attribute *attr); | |
317 | extern void device_remove_bin_file(struct device *dev, | |
318 | struct bin_attribute *attr); | |
523ded71 | 319 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 320 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
321 | |
322 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
323 | #define device_schedule_callback(dev, func) \ | |
324 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
325 | |
326 | /* device resource management */ | |
327 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
328 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
329 | ||
330 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 331 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
332 | const char *name); |
333 | #define devres_alloc(release, size, gfp) \ | |
334 | __devres_alloc(release, size, gfp, #release) | |
335 | #else | |
d462943a | 336 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e TH |
337 | #endif |
338 | extern void devres_free(void *res); | |
339 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 340 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 341 | dr_match_t match, void *match_data); |
d462943a GKH |
342 | extern void *devres_get(struct device *dev, void *new_res, |
343 | dr_match_t match, void *match_data); | |
344 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
345 | dr_match_t match, void *match_data); | |
9ac7849e TH |
346 | extern int devres_destroy(struct device *dev, dr_release_t release, |
347 | dr_match_t match, void *match_data); | |
348 | ||
349 | /* devres group */ | |
350 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
351 | gfp_t gfp); | |
352 | extern void devres_close_group(struct device *dev, void *id); | |
353 | extern void devres_remove_group(struct device *dev, void *id); | |
354 | extern int devres_release_group(struct device *dev, void *id); | |
355 | ||
356 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
357 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
358 | extern void devm_kfree(struct device *dev, void *p); | |
359 | ||
6b7b6510 FT |
360 | struct device_dma_parameters { |
361 | /* | |
362 | * a low level driver may set these to teach IOMMU code about | |
363 | * sg limitations. | |
364 | */ | |
365 | unsigned int max_segment_size; | |
366 | unsigned long segment_boundary_mask; | |
367 | }; | |
368 | ||
1da177e4 | 369 | struct device { |
e2d40776 GKH |
370 | struct klist klist_children; |
371 | struct klist_node knode_parent; /* node in sibling list */ | |
cda5e83f | 372 | struct klist_node knode_driver; |
4db8e282 | 373 | struct klist_node knode_bus; |
49a4ec18 | 374 | struct device *parent; |
1da177e4 LT |
375 | |
376 | struct kobject kobj; | |
377 | char bus_id[BUS_ID_SIZE]; /* position on parent bus */ | |
929d2fa5 | 378 | unsigned uevent_suppress:1; |
c906a48a | 379 | const char *init_name; /* initial name of the device */ |
f9f852df | 380 | struct device_type *type; |
1da177e4 | 381 | |
af70316a PM |
382 | struct semaphore sem; /* semaphore to synchronize calls to |
383 | * its driver. | |
384 | */ | |
385 | ||
d462943a | 386 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
387 | struct device_driver *driver; /* which driver has allocated this |
388 | device */ | |
389 | void *driver_data; /* data private to the driver */ | |
4e10d12a DSL |
390 | void *platform_data; /* Platform specific data, device |
391 | core doesn't touch it */ | |
1da177e4 LT |
392 | struct dev_pm_info power; |
393 | ||
87348136 CH |
394 | #ifdef CONFIG_NUMA |
395 | int numa_node; /* NUMA node this device is close to */ | |
396 | #endif | |
1da177e4 LT |
397 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
398 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
399 | alloc_coherent mappings as | |
400 | not all hardware supports | |
401 | 64 bit addresses for consistent | |
402 | allocations such descriptors. */ | |
403 | ||
6b7b6510 FT |
404 | struct device_dma_parameters *dma_parms; |
405 | ||
1da177e4 LT |
406 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
407 | ||
408 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
409 | override */ | |
c6dbaef2 BH |
410 | /* arch specific additions */ |
411 | struct dev_archdata archdata; | |
1da177e4 | 412 | |
929d2fa5 MW |
413 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
414 | ||
9ac7849e TH |
415 | spinlock_t devres_lock; |
416 | struct list_head devres_head; | |
417 | ||
5a3ceb86 | 418 | struct klist_node knode_class; |
b7a3e813 | 419 | struct class *class; |
de0ff00d | 420 | struct attribute_group **groups; /* optional groups */ |
23681e47 | 421 | |
d462943a | 422 | void (*release)(struct device *dev); |
1da177e4 LT |
423 | }; |
424 | ||
9a3df1f7 AS |
425 | /* Get the wakeup routines, which depend on struct device */ |
426 | #include <linux/pm_wakeup.h> | |
427 | ||
bf9ca69f | 428 | static inline const char *dev_name(const struct device *dev) |
06916639 KS |
429 | { |
430 | /* will be changed into kobject_name(&dev->kobj) in the near future */ | |
431 | return dev->bus_id; | |
432 | } | |
433 | ||
413c239f SR |
434 | extern int dev_set_name(struct device *dev, const char *name, ...) |
435 | __attribute__((format(printf, 2, 3))); | |
436 | ||
87348136 CH |
437 | #ifdef CONFIG_NUMA |
438 | static inline int dev_to_node(struct device *dev) | |
439 | { | |
440 | return dev->numa_node; | |
441 | } | |
442 | static inline void set_dev_node(struct device *dev, int node) | |
443 | { | |
444 | dev->numa_node = node; | |
445 | } | |
446 | #else | |
447 | static inline int dev_to_node(struct device *dev) | |
448 | { | |
449 | return -1; | |
450 | } | |
451 | static inline void set_dev_node(struct device *dev, int node) | |
452 | { | |
453 | } | |
454 | #endif | |
455 | ||
7d1d8999 | 456 | static inline void *dev_get_drvdata(const struct device *dev) |
1da177e4 LT |
457 | { |
458 | return dev->driver_data; | |
459 | } | |
460 | ||
d462943a | 461 | static inline void dev_set_drvdata(struct device *dev, void *data) |
1da177e4 LT |
462 | { |
463 | dev->driver_data = data; | |
464 | } | |
465 | ||
d305ef5d DR |
466 | static inline int device_is_registered(struct device *dev) |
467 | { | |
3f62e570 | 468 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
469 | } |
470 | ||
1f21782e AB |
471 | void driver_init(void); |
472 | ||
1da177e4 LT |
473 | /* |
474 | * High level routines for use by the bus drivers | |
475 | */ | |
d462943a GKH |
476 | extern int __must_check device_register(struct device *dev); |
477 | extern void device_unregister(struct device *dev); | |
478 | extern void device_initialize(struct device *dev); | |
479 | extern int __must_check device_add(struct device *dev); | |
480 | extern void device_del(struct device *dev); | |
481 | extern int device_for_each_child(struct device *dev, void *data, | |
482 | int (*fn)(struct device *dev, void *data)); | |
483 | extern struct device *device_find_child(struct device *dev, void *data, | |
484 | int (*match)(struct device *dev, void *data)); | |
a2de48ca | 485 | extern int device_rename(struct device *dev, char *new_name); |
8a82472f | 486 | extern int device_move(struct device *dev, struct device *new_parent); |
1da177e4 | 487 | |
0aa0dc41 MM |
488 | /* |
489 | * Root device objects for grouping under /sys/devices | |
490 | */ | |
491 | extern struct device *__root_device_register(const char *name, | |
492 | struct module *owner); | |
493 | static inline struct device *root_device_register(const char *name) | |
494 | { | |
495 | return __root_device_register(name, THIS_MODULE); | |
496 | } | |
497 | extern void root_device_unregister(struct device *root); | |
498 | ||
1da177e4 LT |
499 | /* |
500 | * Manual binding of a device to driver. See drivers/base/bus.c | |
501 | * for information on use. | |
502 | */ | |
f86db396 | 503 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
504 | extern void device_release_driver(struct device *dev); |
505 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
506 | extern int __must_check driver_attach(struct device_driver *drv); |
507 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 508 | |
23681e47 GKH |
509 | /* |
510 | * Easy functions for dynamically creating devices on the fly | |
511 | */ | |
8882b394 GKH |
512 | extern struct device *device_create_vargs(struct class *cls, |
513 | struct device *parent, | |
514 | dev_t devt, | |
515 | void *drvdata, | |
516 | const char *fmt, | |
517 | va_list vargs); | |
4e106739 GKH |
518 | extern struct device *device_create(struct class *cls, struct device *parent, |
519 | dev_t devt, void *drvdata, | |
520 | const char *fmt, ...) | |
8882b394 | 521 | __attribute__((format(printf, 5, 6))); |
23681e47 | 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 */ | |
d462943a | 530 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 531 | |
d462943a | 532 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
533 | |
534 | ||
535 | /** | |
536 | * get_device - atomically increment the reference count for the device. | |
537 | * | |
538 | */ | |
d462943a GKH |
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 | ||
58b3b71d RW |
546 | /* drivers/base/sys.c */ |
547 | extern void sysdev_shutdown(void); | |
548 | ||
1da177e4 | 549 | /* debugging and troubleshooting/diagnostic helpers. */ |
bf9ca69f | 550 | extern const char *dev_driver_string(const struct device *dev); |
1da177e4 | 551 | #define dev_printk(level, dev, format, arg...) \ |
d462943a | 552 | printk(level "%s %s: " format , dev_driver_string(dev) , \ |
06916639 | 553 | dev_name(dev) , ## arg) |
1da177e4 | 554 | |
7b8712e5 EM |
555 | #define dev_emerg(dev, format, arg...) \ |
556 | dev_printk(KERN_EMERG , dev , format , ## arg) | |
557 | #define dev_alert(dev, format, arg...) \ | |
558 | dev_printk(KERN_ALERT , dev , format , ## arg) | |
559 | #define dev_crit(dev, format, arg...) \ | |
560 | dev_printk(KERN_CRIT , dev , format , ## arg) | |
561 | #define dev_err(dev, format, arg...) \ | |
562 | dev_printk(KERN_ERR , dev , format , ## arg) | |
563 | #define dev_warn(dev, format, arg...) \ | |
564 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
565 | #define dev_notice(dev, format, arg...) \ | |
566 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
567 | #define dev_info(dev, format, arg...) \ | |
568 | dev_printk(KERN_INFO , dev , format , ## arg) | |
569 | ||
d0d85ff9 CH |
570 | #if defined(DEBUG) |
571 | #define dev_dbg(dev, format, arg...) \ | |
572 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
573 | #elif defined(CONFIG_DYNAMIC_PRINTK_DEBUG) | |
346e15be JB |
574 | #define dev_dbg(dev, format, ...) do { \ |
575 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ | |
576 | } while (0) | |
1da177e4 | 577 | #else |
1429db83 JP |
578 | #define dev_dbg(dev, format, arg...) \ |
579 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
1da177e4 LT |
580 | #endif |
581 | ||
aebdc3b4 DB |
582 | #ifdef VERBOSE_DEBUG |
583 | #define dev_vdbg dev_dbg | |
584 | #else | |
1429db83 JP |
585 | |
586 | #define dev_vdbg(dev, format, arg...) \ | |
587 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
aebdc3b4 DB |
588 | #endif |
589 | ||
e6139662 AV |
590 | /* |
591 | * dev_WARN() acts like dev_printk(), but with the key difference | |
592 | * of using a WARN/WARN_ON to get the message out, including the | |
593 | * file/line information and a backtrace. | |
594 | */ | |
595 | #define dev_WARN(dev, format, arg...) \ | |
596 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
597 | ||
1da177e4 LT |
598 | /* Create alias, so I can be autoloaded. */ |
599 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
600 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
601 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
602 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
603 | #endif /* _DEVICE_H_ */ |