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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> | |
b4028437 GKH |
5 | * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de> |
6 | * Copyright (c) 2008-2009 Novell Inc. | |
1da177e4 LT |
7 | * |
8 | * This file is released under the GPLv2 | |
9 | * | |
10 | * See Documentation/driver-model/ for more information. | |
11 | */ | |
12 | ||
13 | #ifndef _DEVICE_H_ | |
14 | #define _DEVICE_H_ | |
15 | ||
1da177e4 LT |
16 | #include <linux/ioport.h> |
17 | #include <linux/kobject.h> | |
465c7a3a | 18 | #include <linux/klist.h> |
1da177e4 | 19 | #include <linux/list.h> |
d2a3b914 | 20 | #include <linux/lockdep.h> |
4a7fb636 | 21 | #include <linux/compiler.h> |
1da177e4 LT |
22 | #include <linux/types.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/pm.h> | |
6188e10d | 25 | #include <linux/semaphore.h> |
1da177e4 | 26 | #include <asm/atomic.h> |
c6dbaef2 | 27 | #include <asm/device.h> |
1da177e4 | 28 | |
1da177e4 | 29 | struct device; |
fb069a5d | 30 | struct device_private; |
1da177e4 | 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); | |
d462943a | 64 | int (*resume)(struct device *dev); |
b8c5cec2 | 65 | |
8150f32b | 66 | const struct dev_pm_ops *pm; |
1eede070 | 67 | |
c6f7e72a | 68 | struct bus_type_private *p; |
1da177e4 LT |
69 | }; |
70 | ||
d462943a GKH |
71 | extern int __must_check bus_register(struct bus_type *bus); |
72 | extern void bus_unregister(struct bus_type *bus); | |
1da177e4 | 73 | |
d462943a | 74 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
1da177e4 | 75 | |
1da177e4 LT |
76 | /* iterator helpers for buses */ |
77 | ||
d462943a GKH |
78 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
79 | int (*fn)(struct device *dev, void *data)); | |
80 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
81 | void *data, | |
82 | int (*match)(struct device *dev, void *data)); | |
1f9ffc04 GKH |
83 | struct device *bus_find_device_by_name(struct bus_type *bus, |
84 | struct device *start, | |
85 | const char *name); | |
1da177e4 | 86 | |
4a7fb636 | 87 | int __must_check bus_for_each_drv(struct bus_type *bus, |
d462943a GKH |
88 | struct device_driver *start, void *data, |
89 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 90 | |
99178b03 GKH |
91 | void bus_sort_breadthfirst(struct bus_type *bus, |
92 | int (*compare)(const struct device *a, | |
93 | const struct device *b)); | |
116af378 BH |
94 | /* |
95 | * Bus notifiers: Get notified of addition/removal of devices | |
96 | * and binding/unbinding of drivers to devices. | |
97 | * In the long run, it should be a replacement for the platform | |
98 | * notify hooks. | |
99 | */ | |
100 | struct notifier_block; | |
101 | ||
102 | extern int bus_register_notifier(struct bus_type *bus, | |
103 | struct notifier_block *nb); | |
104 | extern int bus_unregister_notifier(struct bus_type *bus, | |
105 | struct notifier_block *nb); | |
106 | ||
107 | /* All 4 notifers below get called with the target struct device * | |
108 | * as an argument. Note that those functions are likely to be called | |
109 | * with the device semaphore held in the core, so be careful. | |
110 | */ | |
111 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
112 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
113 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
114 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
115 | unbound */ | |
309b7d60 JR |
116 | #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound |
117 | from the device */ | |
116af378 | 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); | |
a4dbd674 | 134 | const struct attribute_group **groups; |
e5dd1278 | 135 | |
8150f32b | 136 | const 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); |
b23530eb | 150 | extern void wait_for_device_probe(void); |
216773a7 | 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); |
6fcf53ac | 196 | char *(*nodename)(struct device *dev); |
1da177e4 | 197 | |
d462943a GKH |
198 | void (*class_release)(struct class *class); |
199 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 200 | |
d462943a GKH |
201 | int (*suspend)(struct device *dev, pm_message_t state); |
202 | int (*resume)(struct device *dev); | |
1eede070 | 203 | |
8150f32b DT |
204 | const struct dev_pm_ops *pm; |
205 | ||
7c71448b | 206 | struct class_private *p; |
1da177e4 LT |
207 | }; |
208 | ||
5a3ceb86 TH |
209 | struct class_dev_iter { |
210 | struct klist_iter ki; | |
211 | const struct device_type *type; | |
212 | }; | |
213 | ||
e105b8bf DW |
214 | extern struct kobject *sysfs_dev_block_kobj; |
215 | extern struct kobject *sysfs_dev_char_kobj; | |
d2a3b914 MW |
216 | extern int __must_check __class_register(struct class *class, |
217 | struct lock_class_key *key); | |
d462943a | 218 | extern void class_unregister(struct class *class); |
d2a3b914 MW |
219 | |
220 | /* This is a #define to keep the compiler from merging different | |
221 | * instances of the __key variable */ | |
222 | #define class_register(class) \ | |
223 | ({ \ | |
224 | static struct lock_class_key __key; \ | |
225 | __class_register(class, &__key); \ | |
226 | }) | |
227 | ||
46227094 JD |
228 | struct class_compat; |
229 | struct class_compat *class_compat_register(const char *name); | |
230 | void class_compat_unregister(struct class_compat *cls); | |
231 | int class_compat_create_link(struct class_compat *cls, struct device *dev, | |
232 | struct device *device_link); | |
233 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, | |
234 | struct device *device_link); | |
235 | ||
5a3ceb86 TH |
236 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
237 | struct class *class, | |
238 | struct device *start, | |
239 | const struct device_type *type); | |
240 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
241 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
242 | ||
93562b53 GKH |
243 | extern int class_for_each_device(struct class *class, struct device *start, |
244 | void *data, | |
fd04897b | 245 | int (*fn)(struct device *dev, void *data)); |
695794ae GKH |
246 | extern struct device *class_find_device(struct class *class, |
247 | struct device *start, void *data, | |
fd04897b | 248 | int (*match)(struct device *, void *)); |
1da177e4 LT |
249 | |
250 | struct class_attribute { | |
d462943a GKH |
251 | struct attribute attr; |
252 | ssize_t (*show)(struct class *class, char *buf); | |
253 | ssize_t (*store)(struct class *class, const char *buf, size_t count); | |
1da177e4 LT |
254 | }; |
255 | ||
d462943a GKH |
256 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
257 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 258 | |
d462943a GKH |
259 | extern int __must_check class_create_file(struct class *class, |
260 | const struct class_attribute *attr); | |
261 | extern void class_remove_file(struct class *class, | |
262 | const struct class_attribute *attr); | |
1da177e4 | 263 | |
1da177e4 LT |
264 | struct class_interface { |
265 | struct list_head node; | |
266 | struct class *class; | |
267 | ||
c47ed219 GKH |
268 | int (*add_dev) (struct device *, struct class_interface *); |
269 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
270 | }; |
271 | ||
4a7fb636 | 272 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
273 | extern void class_interface_unregister(struct class_interface *); |
274 | ||
d2a3b914 MW |
275 | extern struct class * __must_check __class_create(struct module *owner, |
276 | const char *name, | |
277 | struct lock_class_key *key); | |
e9ba6365 | 278 | extern void class_destroy(struct class *cls); |
e9ba6365 | 279 | |
d2a3b914 MW |
280 | /* This is a #define to keep the compiler from merging different |
281 | * instances of the __key variable */ | |
282 | #define class_create(owner, name) \ | |
283 | ({ \ | |
284 | static struct lock_class_key __key; \ | |
285 | __class_create(owner, name, &__key); \ | |
286 | }) | |
287 | ||
414264f9 KS |
288 | /* |
289 | * The type of device, "struct device" is embedded in. A class | |
290 | * or bus can contain devices of different types | |
291 | * like "partitions" and "disks", "mouse" and "event". | |
292 | * This identifies the device type and carries type-specific | |
293 | * information, equivalent to the kobj_type of a kobject. | |
294 | * If "name" is specified, the uevent will contain it in | |
295 | * the DEVTYPE variable. | |
296 | */ | |
f9f852df | 297 | struct device_type { |
414264f9 | 298 | const char *name; |
a4dbd674 | 299 | const struct attribute_group **groups; |
7eff2e7a | 300 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
6fcf53ac | 301 | char *(*nodename)(struct device *dev); |
f9f852df | 302 | void (*release)(struct device *dev); |
1eede070 | 303 | |
8150f32b | 304 | const struct dev_pm_ops *pm; |
f9f852df KS |
305 | }; |
306 | ||
a7fd6706 KS |
307 | /* interface for exporting device attributes */ |
308 | struct device_attribute { | |
309 | struct attribute attr; | |
310 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
311 | char *buf); | |
312 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
313 | const char *buf, size_t count); | |
314 | }; | |
315 | ||
d462943a GKH |
316 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
317 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
a7fd6706 | 318 | |
4a7fb636 | 319 | extern int __must_check device_create_file(struct device *device, |
d462943a GKH |
320 | struct device_attribute *entry); |
321 | extern void device_remove_file(struct device *dev, | |
322 | struct device_attribute *attr); | |
2589f188 GKH |
323 | extern int __must_check device_create_bin_file(struct device *dev, |
324 | struct bin_attribute *attr); | |
325 | extern void device_remove_bin_file(struct device *dev, | |
326 | struct bin_attribute *attr); | |
523ded71 | 327 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 328 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
329 | |
330 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
331 | #define device_schedule_callback(dev, func) \ | |
332 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
333 | |
334 | /* device resource management */ | |
335 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
336 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
337 | ||
338 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 339 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
340 | const char *name); |
341 | #define devres_alloc(release, size, gfp) \ | |
342 | __devres_alloc(release, size, gfp, #release) | |
343 | #else | |
d462943a | 344 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e TH |
345 | #endif |
346 | extern void devres_free(void *res); | |
347 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 348 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 349 | dr_match_t match, void *match_data); |
d462943a GKH |
350 | extern void *devres_get(struct device *dev, void *new_res, |
351 | dr_match_t match, void *match_data); | |
352 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
353 | dr_match_t match, void *match_data); | |
9ac7849e TH |
354 | extern int devres_destroy(struct device *dev, dr_release_t release, |
355 | dr_match_t match, void *match_data); | |
356 | ||
357 | /* devres group */ | |
358 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
359 | gfp_t gfp); | |
360 | extern void devres_close_group(struct device *dev, void *id); | |
361 | extern void devres_remove_group(struct device *dev, void *id); | |
362 | extern int devres_release_group(struct device *dev, void *id); | |
363 | ||
364 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
365 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
366 | extern void devm_kfree(struct device *dev, void *p); | |
367 | ||
6b7b6510 FT |
368 | struct device_dma_parameters { |
369 | /* | |
370 | * a low level driver may set these to teach IOMMU code about | |
371 | * sg limitations. | |
372 | */ | |
373 | unsigned int max_segment_size; | |
374 | unsigned long segment_boundary_mask; | |
375 | }; | |
376 | ||
1da177e4 | 377 | struct device { |
49a4ec18 | 378 | struct device *parent; |
1da177e4 | 379 | |
fb069a5d GKH |
380 | struct device_private *p; |
381 | ||
1da177e4 | 382 | struct kobject kobj; |
c906a48a | 383 | const char *init_name; /* initial name of the device */ |
f9f852df | 384 | struct device_type *type; |
1da177e4 | 385 | |
af70316a PM |
386 | struct semaphore sem; /* semaphore to synchronize calls to |
387 | * its driver. | |
388 | */ | |
389 | ||
d462943a | 390 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
391 | struct device_driver *driver; /* which driver has allocated this |
392 | device */ | |
e67c8562 GKH |
393 | void *platform_data; /* Platform specific data, device |
394 | core doesn't touch it */ | |
1da177e4 LT |
395 | struct dev_pm_info power; |
396 | ||
87348136 CH |
397 | #ifdef CONFIG_NUMA |
398 | int numa_node; /* NUMA node this device is close to */ | |
399 | #endif | |
1da177e4 LT |
400 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
401 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
402 | alloc_coherent mappings as | |
403 | not all hardware supports | |
404 | 64 bit addresses for consistent | |
405 | allocations such descriptors. */ | |
406 | ||
6b7b6510 FT |
407 | struct device_dma_parameters *dma_parms; |
408 | ||
1da177e4 LT |
409 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
410 | ||
411 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
412 | override */ | |
c6dbaef2 BH |
413 | /* arch specific additions */ |
414 | struct dev_archdata archdata; | |
1da177e4 | 415 | |
929d2fa5 MW |
416 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
417 | ||
9ac7849e TH |
418 | spinlock_t devres_lock; |
419 | struct list_head devres_head; | |
420 | ||
5a3ceb86 | 421 | struct klist_node knode_class; |
b7a3e813 | 422 | struct class *class; |
a4dbd674 | 423 | const struct attribute_group **groups; /* optional groups */ |
23681e47 | 424 | |
d462943a | 425 | void (*release)(struct device *dev); |
1da177e4 LT |
426 | }; |
427 | ||
9a3df1f7 AS |
428 | /* Get the wakeup routines, which depend on struct device */ |
429 | #include <linux/pm_wakeup.h> | |
430 | ||
bf9ca69f | 431 | static inline const char *dev_name(const struct device *dev) |
06916639 | 432 | { |
1fa5ae85 | 433 | return kobject_name(&dev->kobj); |
06916639 KS |
434 | } |
435 | ||
413c239f SR |
436 | extern int dev_set_name(struct device *dev, const char *name, ...) |
437 | __attribute__((format(printf, 2, 3))); | |
438 | ||
87348136 CH |
439 | #ifdef CONFIG_NUMA |
440 | static inline int dev_to_node(struct device *dev) | |
441 | { | |
442 | return dev->numa_node; | |
443 | } | |
444 | static inline void set_dev_node(struct device *dev, int node) | |
445 | { | |
446 | dev->numa_node = node; | |
447 | } | |
448 | #else | |
449 | static inline int dev_to_node(struct device *dev) | |
450 | { | |
451 | return -1; | |
452 | } | |
453 | static inline void set_dev_node(struct device *dev, int node) | |
454 | { | |
455 | } | |
456 | #endif | |
457 | ||
f67f129e ML |
458 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) |
459 | { | |
460 | return dev->kobj.uevent_suppress; | |
461 | } | |
462 | ||
463 | static inline void dev_set_uevent_suppress(struct device *dev, int val) | |
464 | { | |
465 | dev->kobj.uevent_suppress = val; | |
466 | } | |
467 | ||
d305ef5d DR |
468 | static inline int device_is_registered(struct device *dev) |
469 | { | |
3f62e570 | 470 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
471 | } |
472 | ||
1f21782e AB |
473 | void driver_init(void); |
474 | ||
1da177e4 LT |
475 | /* |
476 | * High level routines for use by the bus drivers | |
477 | */ | |
d462943a GKH |
478 | extern int __must_check device_register(struct device *dev); |
479 | extern void device_unregister(struct device *dev); | |
480 | extern void device_initialize(struct device *dev); | |
481 | extern int __must_check device_add(struct device *dev); | |
482 | extern void device_del(struct device *dev); | |
483 | extern int device_for_each_child(struct device *dev, void *data, | |
484 | int (*fn)(struct device *dev, void *data)); | |
485 | extern struct device *device_find_child(struct device *dev, void *data, | |
486 | int (*match)(struct device *dev, void *data)); | |
a2de48ca | 487 | extern int device_rename(struct device *dev, char *new_name); |
ffa6a705 CH |
488 | extern int device_move(struct device *dev, struct device *new_parent, |
489 | enum dpm_order dpm_order); | |
6fcf53ac | 490 | extern const char *device_get_nodename(struct device *dev, const char **tmp); |
b4028437 GKH |
491 | extern void *dev_get_drvdata(const struct device *dev); |
492 | extern void dev_set_drvdata(struct device *dev, void *data); | |
1da177e4 | 493 | |
0aa0dc41 MM |
494 | /* |
495 | * Root device objects for grouping under /sys/devices | |
496 | */ | |
497 | extern struct device *__root_device_register(const char *name, | |
498 | struct module *owner); | |
499 | static inline struct device *root_device_register(const char *name) | |
500 | { | |
501 | return __root_device_register(name, THIS_MODULE); | |
502 | } | |
503 | extern void root_device_unregister(struct device *root); | |
504 | ||
a5b8b1ad MB |
505 | static inline void *dev_get_platdata(const struct device *dev) |
506 | { | |
507 | return dev->platform_data; | |
508 | } | |
509 | ||
1da177e4 LT |
510 | /* |
511 | * Manual binding of a device to driver. See drivers/base/bus.c | |
512 | * for information on use. | |
513 | */ | |
f86db396 | 514 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
515 | extern void device_release_driver(struct device *dev); |
516 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
517 | extern int __must_check driver_attach(struct device_driver *drv); |
518 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 519 | |
23681e47 GKH |
520 | /* |
521 | * Easy functions for dynamically creating devices on the fly | |
522 | */ | |
8882b394 GKH |
523 | extern struct device *device_create_vargs(struct class *cls, |
524 | struct device *parent, | |
525 | dev_t devt, | |
526 | void *drvdata, | |
527 | const char *fmt, | |
528 | va_list vargs); | |
4e106739 GKH |
529 | extern struct device *device_create(struct class *cls, struct device *parent, |
530 | dev_t devt, void *drvdata, | |
531 | const char *fmt, ...) | |
8882b394 | 532 | __attribute__((format(printf, 5, 6))); |
23681e47 | 533 | extern void device_destroy(struct class *cls, dev_t devt); |
1da177e4 | 534 | |
1da177e4 LT |
535 | /* |
536 | * Platform "fixup" functions - allow the platform to have their say | |
537 | * about devices and actions that the general device layer doesn't | |
538 | * know about. | |
539 | */ | |
540 | /* Notify platform of device discovery */ | |
d462943a | 541 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 542 | |
d462943a | 543 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
544 | |
545 | ||
546 | /** | |
547 | * get_device - atomically increment the reference count for the device. | |
548 | * | |
549 | */ | |
d462943a GKH |
550 | extern struct device *get_device(struct device *dev); |
551 | extern void put_device(struct device *dev); | |
1da177e4 | 552 | |
d4d5291c | 553 | extern void wait_for_device_probe(void); |
1da177e4 | 554 | |
116f232b | 555 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
556 | extern void device_shutdown(void); |
557 | ||
58b3b71d RW |
558 | /* drivers/base/sys.c */ |
559 | extern void sysdev_shutdown(void); | |
560 | ||
1da177e4 | 561 | /* debugging and troubleshooting/diagnostic helpers. */ |
bf9ca69f | 562 | extern const char *dev_driver_string(const struct device *dev); |
1da177e4 | 563 | #define dev_printk(level, dev, format, arg...) \ |
d462943a | 564 | printk(level "%s %s: " format , dev_driver_string(dev) , \ |
06916639 | 565 | dev_name(dev) , ## arg) |
1da177e4 | 566 | |
7b8712e5 EM |
567 | #define dev_emerg(dev, format, arg...) \ |
568 | dev_printk(KERN_EMERG , dev , format , ## arg) | |
569 | #define dev_alert(dev, format, arg...) \ | |
570 | dev_printk(KERN_ALERT , dev , format , ## arg) | |
571 | #define dev_crit(dev, format, arg...) \ | |
572 | dev_printk(KERN_CRIT , dev , format , ## arg) | |
573 | #define dev_err(dev, format, arg...) \ | |
574 | dev_printk(KERN_ERR , dev , format , ## arg) | |
575 | #define dev_warn(dev, format, arg...) \ | |
576 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
577 | #define dev_notice(dev, format, arg...) \ | |
578 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
579 | #define dev_info(dev, format, arg...) \ | |
580 | dev_printk(KERN_INFO , dev , format , ## arg) | |
581 | ||
d0d85ff9 CH |
582 | #if defined(DEBUG) |
583 | #define dev_dbg(dev, format, arg...) \ | |
584 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
e9d376f0 | 585 | #elif defined(CONFIG_DYNAMIC_DEBUG) |
346e15be JB |
586 | #define dev_dbg(dev, format, ...) do { \ |
587 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ | |
588 | } while (0) | |
1da177e4 | 589 | #else |
1429db83 JP |
590 | #define dev_dbg(dev, format, arg...) \ |
591 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
1da177e4 LT |
592 | #endif |
593 | ||
aebdc3b4 DB |
594 | #ifdef VERBOSE_DEBUG |
595 | #define dev_vdbg dev_dbg | |
596 | #else | |
1429db83 JP |
597 | |
598 | #define dev_vdbg(dev, format, arg...) \ | |
599 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
aebdc3b4 DB |
600 | #endif |
601 | ||
e6139662 AV |
602 | /* |
603 | * dev_WARN() acts like dev_printk(), but with the key difference | |
604 | * of using a WARN/WARN_ON to get the message out, including the | |
605 | * file/line information and a backtrace. | |
606 | */ | |
607 | #define dev_WARN(dev, format, arg...) \ | |
608 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
609 | ||
1da177e4 LT |
610 | /* Create alias, so I can be autoloaded. */ |
611 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
612 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
613 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
614 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
615 | #endif /* _DEVICE_H_ */ |