Commit | Line | Data |
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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; |
d706c1b0 | 37 | struct device_node; |
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); | |
d462943a | 65 | int (*resume)(struct device *dev); |
b8c5cec2 | 66 | |
8150f32b | 67 | const struct dev_pm_ops *pm; |
1eede070 | 68 | |
c6f7e72a | 69 | struct bus_type_private *p; |
1da177e4 LT |
70 | }; |
71 | ||
d462943a GKH |
72 | extern int __must_check bus_register(struct bus_type *bus); |
73 | extern void bus_unregister(struct bus_type *bus); | |
1da177e4 | 74 | |
d462943a | 75 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
1da177e4 | 76 | |
1da177e4 LT |
77 | /* iterator helpers for buses */ |
78 | ||
d462943a GKH |
79 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
80 | int (*fn)(struct device *dev, void *data)); | |
81 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
82 | void *data, | |
83 | int (*match)(struct device *dev, void *data)); | |
1f9ffc04 GKH |
84 | struct device *bus_find_device_by_name(struct bus_type *bus, |
85 | struct device *start, | |
86 | const char *name); | |
1da177e4 | 87 | |
4a7fb636 | 88 | int __must_check bus_for_each_drv(struct bus_type *bus, |
d462943a GKH |
89 | struct device_driver *start, void *data, |
90 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 91 | |
99178b03 GKH |
92 | void bus_sort_breadthfirst(struct bus_type *bus, |
93 | int (*compare)(const struct device *a, | |
94 | const struct device *b)); | |
116af378 BH |
95 | /* |
96 | * Bus notifiers: Get notified of addition/removal of devices | |
97 | * and binding/unbinding of drivers to devices. | |
98 | * In the long run, it should be a replacement for the platform | |
99 | * notify hooks. | |
100 | */ | |
101 | struct notifier_block; | |
102 | ||
103 | extern int bus_register_notifier(struct bus_type *bus, | |
104 | struct notifier_block *nb); | |
105 | extern int bus_unregister_notifier(struct bus_type *bus, | |
106 | struct notifier_block *nb); | |
107 | ||
108 | /* All 4 notifers below get called with the target struct device * | |
109 | * as an argument. Note that those functions are likely to be called | |
8e9394ce | 110 | * with the device lock held in the core, so be careful. |
116af378 BH |
111 | */ |
112 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
113 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
114 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
115 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
116 | unbound */ | |
309b7d60 JR |
117 | #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound |
118 | from the device */ | |
116af378 | 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 | 127 | struct module *owner; |
1a6f2a75 DT |
128 | const char *mod_name; /* used for built-in modules */ |
129 | ||
130 | bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ | |
1da177e4 | 131 | |
d462943a GKH |
132 | int (*probe) (struct device *dev); |
133 | int (*remove) (struct device *dev); | |
134 | void (*shutdown) (struct device *dev); | |
135 | int (*suspend) (struct device *dev, pm_message_t state); | |
136 | int (*resume) (struct device *dev); | |
a4dbd674 | 137 | const struct attribute_group **groups; |
e5dd1278 | 138 | |
8150f32b | 139 | const struct dev_pm_ops *pm; |
1eede070 | 140 | |
e5dd1278 | 141 | struct driver_private *p; |
1da177e4 LT |
142 | }; |
143 | ||
144 | ||
d462943a GKH |
145 | extern int __must_check driver_register(struct device_driver *drv); |
146 | extern void driver_unregister(struct device_driver *drv); | |
1da177e4 | 147 | |
d462943a GKH |
148 | extern struct device_driver *get_driver(struct device_driver *drv); |
149 | extern void put_driver(struct device_driver *drv); | |
150 | extern struct device_driver *driver_find(const char *name, | |
151 | struct bus_type *bus); | |
d779249e | 152 | extern int driver_probe_done(void); |
b23530eb | 153 | extern void wait_for_device_probe(void); |
216773a7 | 154 | |
1da177e4 | 155 | |
405ae7d3 | 156 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
157 | |
158 | struct driver_attribute { | |
d462943a GKH |
159 | struct attribute attr; |
160 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
161 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
162 | size_t count); | |
1da177e4 LT |
163 | }; |
164 | ||
d462943a GKH |
165 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
166 | struct driver_attribute driver_attr_##_name = \ | |
167 | __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 168 | |
d462943a | 169 | extern int __must_check driver_create_file(struct device_driver *driver, |
099c2f21 | 170 | const struct driver_attribute *attr); |
d462943a | 171 | extern void driver_remove_file(struct device_driver *driver, |
099c2f21 | 172 | const struct driver_attribute *attr); |
1da177e4 | 173 | |
cbe9c595 GKH |
174 | extern int __must_check driver_add_kobj(struct device_driver *drv, |
175 | struct kobject *kobj, | |
176 | const char *fmt, ...); | |
177 | ||
d462943a GKH |
178 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
179 | struct device *start, | |
180 | void *data, | |
181 | int (*fn)(struct device *dev, | |
182 | void *)); | |
183 | struct device *driver_find_device(struct device_driver *drv, | |
184 | struct device *start, void *data, | |
185 | int (*match)(struct device *dev, void *data)); | |
fae3cd00 | 186 | |
1da177e4 LT |
187 | /* |
188 | * device classes | |
189 | */ | |
190 | struct class { | |
d462943a GKH |
191 | const char *name; |
192 | struct module *owner; | |
1da177e4 | 193 | |
d462943a | 194 | struct class_attribute *class_attrs; |
d462943a | 195 | struct device_attribute *dev_attrs; |
e105b8bf | 196 | struct kobject *dev_kobj; |
1da177e4 | 197 | |
d462943a | 198 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
e454cea2 | 199 | char *(*devnode)(struct device *dev, mode_t *mode); |
1da177e4 | 200 | |
d462943a GKH |
201 | void (*class_release)(struct class *class); |
202 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 203 | |
d462943a GKH |
204 | int (*suspend)(struct device *dev, pm_message_t state); |
205 | int (*resume)(struct device *dev); | |
1eede070 | 206 | |
8150f32b DT |
207 | const struct dev_pm_ops *pm; |
208 | ||
7c71448b | 209 | struct class_private *p; |
1da177e4 LT |
210 | }; |
211 | ||
5a3ceb86 TH |
212 | struct class_dev_iter { |
213 | struct klist_iter ki; | |
214 | const struct device_type *type; | |
215 | }; | |
216 | ||
e105b8bf DW |
217 | extern struct kobject *sysfs_dev_block_kobj; |
218 | extern struct kobject *sysfs_dev_char_kobj; | |
d2a3b914 MW |
219 | extern int __must_check __class_register(struct class *class, |
220 | struct lock_class_key *key); | |
d462943a | 221 | extern void class_unregister(struct class *class); |
d2a3b914 MW |
222 | |
223 | /* This is a #define to keep the compiler from merging different | |
224 | * instances of the __key variable */ | |
225 | #define class_register(class) \ | |
226 | ({ \ | |
227 | static struct lock_class_key __key; \ | |
228 | __class_register(class, &__key); \ | |
229 | }) | |
230 | ||
46227094 JD |
231 | struct class_compat; |
232 | struct class_compat *class_compat_register(const char *name); | |
233 | void class_compat_unregister(struct class_compat *cls); | |
234 | int class_compat_create_link(struct class_compat *cls, struct device *dev, | |
235 | struct device *device_link); | |
236 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, | |
237 | struct device *device_link); | |
238 | ||
5a3ceb86 TH |
239 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
240 | struct class *class, | |
241 | struct device *start, | |
242 | const struct device_type *type); | |
243 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
244 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
245 | ||
93562b53 GKH |
246 | extern int class_for_each_device(struct class *class, struct device *start, |
247 | void *data, | |
fd04897b | 248 | int (*fn)(struct device *dev, void *data)); |
695794ae GKH |
249 | extern struct device *class_find_device(struct class *class, |
250 | struct device *start, void *data, | |
fd04897b | 251 | int (*match)(struct device *, void *)); |
1da177e4 LT |
252 | |
253 | struct class_attribute { | |
d462943a | 254 | struct attribute attr; |
28812fe1 AK |
255 | ssize_t (*show)(struct class *class, struct class_attribute *attr, |
256 | char *buf); | |
257 | ssize_t (*store)(struct class *class, struct class_attribute *attr, | |
258 | const char *buf, size_t count); | |
1da177e4 LT |
259 | }; |
260 | ||
d462943a GKH |
261 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
262 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 263 | |
d462943a GKH |
264 | extern int __must_check class_create_file(struct class *class, |
265 | const struct class_attribute *attr); | |
266 | extern void class_remove_file(struct class *class, | |
267 | const struct class_attribute *attr); | |
1da177e4 | 268 | |
869dfc87 AK |
269 | /* Simple class attribute that is just a static string */ |
270 | ||
271 | struct class_attribute_string { | |
272 | struct class_attribute attr; | |
273 | char *str; | |
274 | }; | |
275 | ||
276 | /* Currently read-only only */ | |
277 | #define _CLASS_ATTR_STRING(_name, _mode, _str) \ | |
278 | { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } | |
279 | #define CLASS_ATTR_STRING(_name, _mode, _str) \ | |
280 | struct class_attribute_string class_attr_##_name = \ | |
281 | _CLASS_ATTR_STRING(_name, _mode, _str) | |
282 | ||
283 | extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, | |
284 | char *buf); | |
285 | ||
1da177e4 LT |
286 | struct class_interface { |
287 | struct list_head node; | |
288 | struct class *class; | |
289 | ||
c47ed219 GKH |
290 | int (*add_dev) (struct device *, struct class_interface *); |
291 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
292 | }; |
293 | ||
4a7fb636 | 294 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
295 | extern void class_interface_unregister(struct class_interface *); |
296 | ||
d2a3b914 MW |
297 | extern struct class * __must_check __class_create(struct module *owner, |
298 | const char *name, | |
299 | struct lock_class_key *key); | |
e9ba6365 | 300 | extern void class_destroy(struct class *cls); |
e9ba6365 | 301 | |
d2a3b914 MW |
302 | /* This is a #define to keep the compiler from merging different |
303 | * instances of the __key variable */ | |
304 | #define class_create(owner, name) \ | |
305 | ({ \ | |
306 | static struct lock_class_key __key; \ | |
307 | __class_create(owner, name, &__key); \ | |
308 | }) | |
309 | ||
414264f9 KS |
310 | /* |
311 | * The type of device, "struct device" is embedded in. A class | |
312 | * or bus can contain devices of different types | |
313 | * like "partitions" and "disks", "mouse" and "event". | |
314 | * This identifies the device type and carries type-specific | |
315 | * information, equivalent to the kobj_type of a kobject. | |
316 | * If "name" is specified, the uevent will contain it in | |
317 | * the DEVTYPE variable. | |
318 | */ | |
f9f852df | 319 | struct device_type { |
414264f9 | 320 | const char *name; |
a4dbd674 | 321 | const struct attribute_group **groups; |
7eff2e7a | 322 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
e454cea2 | 323 | char *(*devnode)(struct device *dev, mode_t *mode); |
f9f852df | 324 | void (*release)(struct device *dev); |
1eede070 | 325 | |
8150f32b | 326 | const struct dev_pm_ops *pm; |
f9f852df KS |
327 | }; |
328 | ||
a7fd6706 KS |
329 | /* interface for exporting device attributes */ |
330 | struct device_attribute { | |
331 | struct attribute attr; | |
332 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
333 | char *buf); | |
334 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
335 | const char *buf, size_t count); | |
336 | }; | |
337 | ||
d462943a GKH |
338 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
339 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
a7fd6706 | 340 | |
4a7fb636 | 341 | extern int __must_check device_create_file(struct device *device, |
66ecb92b | 342 | const struct device_attribute *entry); |
d462943a | 343 | extern void device_remove_file(struct device *dev, |
26579ab7 | 344 | const struct device_attribute *attr); |
2589f188 | 345 | extern int __must_check device_create_bin_file(struct device *dev, |
66ecb92b | 346 | const struct bin_attribute *attr); |
2589f188 | 347 | extern void device_remove_bin_file(struct device *dev, |
66ecb92b | 348 | const struct bin_attribute *attr); |
523ded71 | 349 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 350 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
351 | |
352 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
353 | #define device_schedule_callback(dev, func) \ | |
354 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
355 | |
356 | /* device resource management */ | |
357 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
358 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
359 | ||
360 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 361 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
362 | const char *name); |
363 | #define devres_alloc(release, size, gfp) \ | |
364 | __devres_alloc(release, size, gfp, #release) | |
365 | #else | |
d462943a | 366 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e TH |
367 | #endif |
368 | extern void devres_free(void *res); | |
369 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 370 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 371 | dr_match_t match, void *match_data); |
d462943a GKH |
372 | extern void *devres_get(struct device *dev, void *new_res, |
373 | dr_match_t match, void *match_data); | |
374 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
375 | dr_match_t match, void *match_data); | |
9ac7849e TH |
376 | extern int devres_destroy(struct device *dev, dr_release_t release, |
377 | dr_match_t match, void *match_data); | |
378 | ||
379 | /* devres group */ | |
380 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
381 | gfp_t gfp); | |
382 | extern void devres_close_group(struct device *dev, void *id); | |
383 | extern void devres_remove_group(struct device *dev, void *id); | |
384 | extern int devres_release_group(struct device *dev, void *id); | |
385 | ||
386 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
387 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
388 | extern void devm_kfree(struct device *dev, void *p); | |
389 | ||
6b7b6510 FT |
390 | struct device_dma_parameters { |
391 | /* | |
392 | * a low level driver may set these to teach IOMMU code about | |
393 | * sg limitations. | |
394 | */ | |
395 | unsigned int max_segment_size; | |
396 | unsigned long segment_boundary_mask; | |
397 | }; | |
398 | ||
1da177e4 | 399 | struct device { |
49a4ec18 | 400 | struct device *parent; |
1da177e4 | 401 | |
fb069a5d GKH |
402 | struct device_private *p; |
403 | ||
1da177e4 | 404 | struct kobject kobj; |
c906a48a | 405 | const char *init_name; /* initial name of the device */ |
f9f852df | 406 | struct device_type *type; |
1da177e4 | 407 | |
af70316a | 408 | struct semaphore sem; /* semaphore to synchronize calls to |
409 | * its driver. | |
410 | */ | |
411 | ||
d462943a | 412 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
413 | struct device_driver *driver; /* which driver has allocated this |
414 | device */ | |
e67c8562 GKH |
415 | void *platform_data; /* Platform specific data, device |
416 | core doesn't touch it */ | |
1da177e4 LT |
417 | struct dev_pm_info power; |
418 | ||
87348136 CH |
419 | #ifdef CONFIG_NUMA |
420 | int numa_node; /* NUMA node this device is close to */ | |
421 | #endif | |
1da177e4 LT |
422 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
423 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
424 | alloc_coherent mappings as | |
425 | not all hardware supports | |
426 | 64 bit addresses for consistent | |
427 | allocations such descriptors. */ | |
428 | ||
6b7b6510 FT |
429 | struct device_dma_parameters *dma_parms; |
430 | ||
1da177e4 LT |
431 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
432 | ||
433 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
434 | override */ | |
c6dbaef2 BH |
435 | /* arch specific additions */ |
436 | struct dev_archdata archdata; | |
d706c1b0 GL |
437 | #ifdef CONFIG_OF |
438 | struct device_node *of_node; | |
439 | #endif | |
1da177e4 | 440 | |
929d2fa5 MW |
441 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
442 | ||
9ac7849e TH |
443 | spinlock_t devres_lock; |
444 | struct list_head devres_head; | |
445 | ||
5a3ceb86 | 446 | struct klist_node knode_class; |
b7a3e813 | 447 | struct class *class; |
a4dbd674 | 448 | const struct attribute_group **groups; /* optional groups */ |
23681e47 | 449 | |
d462943a | 450 | void (*release)(struct device *dev); |
1da177e4 LT |
451 | }; |
452 | ||
9a3df1f7 AS |
453 | /* Get the wakeup routines, which depend on struct device */ |
454 | #include <linux/pm_wakeup.h> | |
455 | ||
bf9ca69f | 456 | static inline const char *dev_name(const struct device *dev) |
06916639 | 457 | { |
1fa5ae85 | 458 | return kobject_name(&dev->kobj); |
06916639 KS |
459 | } |
460 | ||
413c239f SR |
461 | extern int dev_set_name(struct device *dev, const char *name, ...) |
462 | __attribute__((format(printf, 2, 3))); | |
463 | ||
87348136 CH |
464 | #ifdef CONFIG_NUMA |
465 | static inline int dev_to_node(struct device *dev) | |
466 | { | |
467 | return dev->numa_node; | |
468 | } | |
469 | static inline void set_dev_node(struct device *dev, int node) | |
470 | { | |
471 | dev->numa_node = node; | |
472 | } | |
473 | #else | |
474 | static inline int dev_to_node(struct device *dev) | |
475 | { | |
476 | return -1; | |
477 | } | |
478 | static inline void set_dev_node(struct device *dev, int node) | |
479 | { | |
480 | } | |
481 | #endif | |
482 | ||
f67f129e ML |
483 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) |
484 | { | |
485 | return dev->kobj.uevent_suppress; | |
486 | } | |
487 | ||
488 | static inline void dev_set_uevent_suppress(struct device *dev, int val) | |
489 | { | |
490 | dev->kobj.uevent_suppress = val; | |
491 | } | |
492 | ||
d305ef5d DR |
493 | static inline int device_is_registered(struct device *dev) |
494 | { | |
3f62e570 | 495 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
496 | } |
497 | ||
5af84b82 RW |
498 | static inline void device_enable_async_suspend(struct device *dev) |
499 | { | |
500 | if (dev->power.status == DPM_ON) | |
501 | dev->power.async_suspend = true; | |
502 | } | |
503 | ||
5a2eb858 RW |
504 | static inline void device_disable_async_suspend(struct device *dev) |
505 | { | |
506 | if (dev->power.status == DPM_ON) | |
507 | dev->power.async_suspend = false; | |
508 | } | |
509 | ||
510 | static inline bool device_async_suspend_enabled(struct device *dev) | |
511 | { | |
512 | return !!dev->power.async_suspend; | |
513 | } | |
514 | ||
8e9394ce GKH |
515 | static inline void device_lock(struct device *dev) |
516 | { | |
517 | down(&dev->sem); | |
518 | } | |
519 | ||
520 | static inline int device_trylock(struct device *dev) | |
521 | { | |
522 | return down_trylock(&dev->sem); | |
523 | } | |
524 | ||
525 | static inline void device_unlock(struct device *dev) | |
526 | { | |
527 | up(&dev->sem); | |
528 | } | |
529 | ||
1f21782e AB |
530 | void driver_init(void); |
531 | ||
1da177e4 LT |
532 | /* |
533 | * High level routines for use by the bus drivers | |
534 | */ | |
d462943a GKH |
535 | extern int __must_check device_register(struct device *dev); |
536 | extern void device_unregister(struct device *dev); | |
537 | extern void device_initialize(struct device *dev); | |
538 | extern int __must_check device_add(struct device *dev); | |
539 | extern void device_del(struct device *dev); | |
540 | extern int device_for_each_child(struct device *dev, void *data, | |
541 | int (*fn)(struct device *dev, void *data)); | |
542 | extern struct device *device_find_child(struct device *dev, void *data, | |
543 | int (*match)(struct device *dev, void *data)); | |
a2de48ca | 544 | extern int device_rename(struct device *dev, char *new_name); |
ffa6a705 CH |
545 | extern int device_move(struct device *dev, struct device *new_parent, |
546 | enum dpm_order dpm_order); | |
e454cea2 KS |
547 | extern const char *device_get_devnode(struct device *dev, |
548 | mode_t *mode, const char **tmp); | |
b4028437 GKH |
549 | extern void *dev_get_drvdata(const struct device *dev); |
550 | extern void dev_set_drvdata(struct device *dev, void *data); | |
1da177e4 | 551 | |
0aa0dc41 MM |
552 | /* |
553 | * Root device objects for grouping under /sys/devices | |
554 | */ | |
555 | extern struct device *__root_device_register(const char *name, | |
556 | struct module *owner); | |
557 | static inline struct device *root_device_register(const char *name) | |
558 | { | |
559 | return __root_device_register(name, THIS_MODULE); | |
560 | } | |
561 | extern void root_device_unregister(struct device *root); | |
562 | ||
a5b8b1ad MB |
563 | static inline void *dev_get_platdata(const struct device *dev) |
564 | { | |
565 | return dev->platform_data; | |
566 | } | |
567 | ||
1da177e4 LT |
568 | /* |
569 | * Manual binding of a device to driver. See drivers/base/bus.c | |
570 | * for information on use. | |
571 | */ | |
f86db396 | 572 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
573 | extern void device_release_driver(struct device *dev); |
574 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
575 | extern int __must_check driver_attach(struct device_driver *drv); |
576 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 577 | |
23681e47 GKH |
578 | /* |
579 | * Easy functions for dynamically creating devices on the fly | |
580 | */ | |
8882b394 GKH |
581 | extern struct device *device_create_vargs(struct class *cls, |
582 | struct device *parent, | |
583 | dev_t devt, | |
584 | void *drvdata, | |
585 | const char *fmt, | |
586 | va_list vargs); | |
4e106739 GKH |
587 | extern struct device *device_create(struct class *cls, struct device *parent, |
588 | dev_t devt, void *drvdata, | |
589 | const char *fmt, ...) | |
8882b394 | 590 | __attribute__((format(printf, 5, 6))); |
23681e47 | 591 | extern void device_destroy(struct class *cls, dev_t devt); |
1da177e4 | 592 | |
1da177e4 LT |
593 | /* |
594 | * Platform "fixup" functions - allow the platform to have their say | |
595 | * about devices and actions that the general device layer doesn't | |
596 | * know about. | |
597 | */ | |
598 | /* Notify platform of device discovery */ | |
d462943a | 599 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 600 | |
d462943a | 601 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
602 | |
603 | ||
604 | /** | |
605 | * get_device - atomically increment the reference count for the device. | |
606 | * | |
607 | */ | |
d462943a GKH |
608 | extern struct device *get_device(struct device *dev); |
609 | extern void put_device(struct device *dev); | |
1da177e4 | 610 | |
d4d5291c | 611 | extern void wait_for_device_probe(void); |
1da177e4 | 612 | |
2b2af54a KS |
613 | #ifdef CONFIG_DEVTMPFS |
614 | extern int devtmpfs_create_node(struct device *dev); | |
615 | extern int devtmpfs_delete_node(struct device *dev); | |
073120cc | 616 | extern int devtmpfs_mount(const char *mntdir); |
2b2af54a KS |
617 | #else |
618 | static inline int devtmpfs_create_node(struct device *dev) { return 0; } | |
619 | static inline int devtmpfs_delete_node(struct device *dev) { return 0; } | |
620 | static inline int devtmpfs_mount(const char *mountpoint) { return 0; } | |
621 | #endif | |
622 | ||
116f232b | 623 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
624 | extern void device_shutdown(void); |
625 | ||
58b3b71d RW |
626 | /* drivers/base/sys.c */ |
627 | extern void sysdev_shutdown(void); | |
628 | ||
1da177e4 | 629 | /* debugging and troubleshooting/diagnostic helpers. */ |
bf9ca69f | 630 | extern const char *dev_driver_string(const struct device *dev); |
1da177e4 | 631 | #define dev_printk(level, dev, format, arg...) \ |
d462943a | 632 | printk(level "%s %s: " format , dev_driver_string(dev) , \ |
06916639 | 633 | dev_name(dev) , ## arg) |
1da177e4 | 634 | |
7b8712e5 EM |
635 | #define dev_emerg(dev, format, arg...) \ |
636 | dev_printk(KERN_EMERG , dev , format , ## arg) | |
637 | #define dev_alert(dev, format, arg...) \ | |
638 | dev_printk(KERN_ALERT , dev , format , ## arg) | |
639 | #define dev_crit(dev, format, arg...) \ | |
640 | dev_printk(KERN_CRIT , dev , format , ## arg) | |
641 | #define dev_err(dev, format, arg...) \ | |
642 | dev_printk(KERN_ERR , dev , format , ## arg) | |
643 | #define dev_warn(dev, format, arg...) \ | |
644 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
645 | #define dev_notice(dev, format, arg...) \ | |
646 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
647 | #define dev_info(dev, format, arg...) \ | |
648 | dev_printk(KERN_INFO , dev , format , ## arg) | |
649 | ||
d0d85ff9 CH |
650 | #if defined(DEBUG) |
651 | #define dev_dbg(dev, format, arg...) \ | |
652 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
e9d376f0 | 653 | #elif defined(CONFIG_DYNAMIC_DEBUG) |
346e15be JB |
654 | #define dev_dbg(dev, format, ...) do { \ |
655 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ | |
656 | } while (0) | |
1da177e4 | 657 | #else |
1429db83 JP |
658 | #define dev_dbg(dev, format, arg...) \ |
659 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
1da177e4 LT |
660 | #endif |
661 | ||
aebdc3b4 DB |
662 | #ifdef VERBOSE_DEBUG |
663 | #define dev_vdbg dev_dbg | |
664 | #else | |
1429db83 JP |
665 | |
666 | #define dev_vdbg(dev, format, arg...) \ | |
667 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
aebdc3b4 DB |
668 | #endif |
669 | ||
e6139662 AV |
670 | /* |
671 | * dev_WARN() acts like dev_printk(), but with the key difference | |
672 | * of using a WARN/WARN_ON to get the message out, including the | |
673 | * file/line information and a backtrace. | |
674 | */ | |
675 | #define dev_WARN(dev, format, arg...) \ | |
676 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
677 | ||
1da177e4 LT |
678 | /* Create alias, so I can be autoloaded. */ |
679 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
680 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
681 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
682 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
683 | #endif /* _DEVICE_H_ */ |