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> | |
1da177e4 | 25 | #include <asm/atomic.h> |
c6dbaef2 | 26 | #include <asm/device.h> |
1da177e4 | 27 | |
1da177e4 | 28 | struct device; |
fb069a5d | 29 | struct device_private; |
1da177e4 | 30 | struct device_driver; |
e5dd1278 | 31 | struct driver_private; |
1da177e4 | 32 | struct class; |
7c71448b | 33 | struct class_private; |
b8c5cec2 | 34 | struct bus_type; |
c6f7e72a | 35 | struct bus_type_private; |
d706c1b0 | 36 | struct device_node; |
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 | |
8e9394ce | 109 | * with the device lock held in the core, so be careful. |
116af378 BH |
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 | 126 | struct module *owner; |
1a6f2a75 DT |
127 | const char *mod_name; /* used for built-in modules */ |
128 | ||
129 | bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ | |
1da177e4 | 130 | |
597b9d1e GL |
131 | #if defined(CONFIG_OF) |
132 | const struct of_device_id *of_match_table; | |
133 | #endif | |
134 | ||
d462943a GKH |
135 | int (*probe) (struct device *dev); |
136 | int (*remove) (struct device *dev); | |
137 | void (*shutdown) (struct device *dev); | |
138 | int (*suspend) (struct device *dev, pm_message_t state); | |
139 | int (*resume) (struct device *dev); | |
a4dbd674 | 140 | const struct attribute_group **groups; |
e5dd1278 | 141 | |
8150f32b | 142 | const struct dev_pm_ops *pm; |
1eede070 | 143 | |
e5dd1278 | 144 | struct driver_private *p; |
1da177e4 LT |
145 | }; |
146 | ||
147 | ||
d462943a GKH |
148 | extern int __must_check driver_register(struct device_driver *drv); |
149 | extern void driver_unregister(struct device_driver *drv); | |
1da177e4 | 150 | |
d462943a GKH |
151 | extern struct device_driver *get_driver(struct device_driver *drv); |
152 | extern void put_driver(struct device_driver *drv); | |
153 | extern struct device_driver *driver_find(const char *name, | |
154 | struct bus_type *bus); | |
d779249e | 155 | extern int driver_probe_done(void); |
b23530eb | 156 | extern void wait_for_device_probe(void); |
216773a7 | 157 | |
1da177e4 | 158 | |
405ae7d3 | 159 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
160 | |
161 | struct driver_attribute { | |
d462943a GKH |
162 | struct attribute attr; |
163 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
164 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
165 | size_t count); | |
1da177e4 LT |
166 | }; |
167 | ||
d462943a GKH |
168 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
169 | struct driver_attribute driver_attr_##_name = \ | |
170 | __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 171 | |
d462943a | 172 | extern int __must_check driver_create_file(struct device_driver *driver, |
099c2f21 | 173 | const struct driver_attribute *attr); |
d462943a | 174 | extern void driver_remove_file(struct device_driver *driver, |
099c2f21 | 175 | const struct driver_attribute *attr); |
1da177e4 | 176 | |
cbe9c595 GKH |
177 | extern int __must_check driver_add_kobj(struct device_driver *drv, |
178 | struct kobject *kobj, | |
179 | const char *fmt, ...); | |
180 | ||
d462943a GKH |
181 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
182 | struct device *start, | |
183 | void *data, | |
184 | int (*fn)(struct device *dev, | |
185 | void *)); | |
186 | struct device *driver_find_device(struct device_driver *drv, | |
187 | struct device *start, void *data, | |
188 | int (*match)(struct device *dev, void *data)); | |
fae3cd00 | 189 | |
1da177e4 LT |
190 | /* |
191 | * device classes | |
192 | */ | |
193 | struct class { | |
d462943a GKH |
194 | const char *name; |
195 | struct module *owner; | |
1da177e4 | 196 | |
d462943a | 197 | struct class_attribute *class_attrs; |
d462943a | 198 | struct device_attribute *dev_attrs; |
e105b8bf | 199 | struct kobject *dev_kobj; |
1da177e4 | 200 | |
d462943a | 201 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
e454cea2 | 202 | char *(*devnode)(struct device *dev, mode_t *mode); |
1da177e4 | 203 | |
d462943a GKH |
204 | void (*class_release)(struct class *class); |
205 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 206 | |
d462943a GKH |
207 | int (*suspend)(struct device *dev, pm_message_t state); |
208 | int (*resume)(struct device *dev); | |
1eede070 | 209 | |
bc451f20 EB |
210 | const struct kobj_ns_type_operations *ns_type; |
211 | const void *(*namespace)(struct device *dev); | |
212 | ||
8150f32b DT |
213 | const struct dev_pm_ops *pm; |
214 | ||
7c71448b | 215 | struct class_private *p; |
1da177e4 LT |
216 | }; |
217 | ||
5a3ceb86 TH |
218 | struct class_dev_iter { |
219 | struct klist_iter ki; | |
220 | const struct device_type *type; | |
221 | }; | |
222 | ||
e105b8bf DW |
223 | extern struct kobject *sysfs_dev_block_kobj; |
224 | extern struct kobject *sysfs_dev_char_kobj; | |
d2a3b914 MW |
225 | extern int __must_check __class_register(struct class *class, |
226 | struct lock_class_key *key); | |
d462943a | 227 | extern void class_unregister(struct class *class); |
d2a3b914 MW |
228 | |
229 | /* This is a #define to keep the compiler from merging different | |
230 | * instances of the __key variable */ | |
231 | #define class_register(class) \ | |
232 | ({ \ | |
233 | static struct lock_class_key __key; \ | |
234 | __class_register(class, &__key); \ | |
235 | }) | |
236 | ||
46227094 JD |
237 | struct class_compat; |
238 | struct class_compat *class_compat_register(const char *name); | |
239 | void class_compat_unregister(struct class_compat *cls); | |
240 | int class_compat_create_link(struct class_compat *cls, struct device *dev, | |
241 | struct device *device_link); | |
242 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, | |
243 | struct device *device_link); | |
244 | ||
5a3ceb86 TH |
245 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
246 | struct class *class, | |
247 | struct device *start, | |
248 | const struct device_type *type); | |
249 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
250 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
251 | ||
93562b53 GKH |
252 | extern int class_for_each_device(struct class *class, struct device *start, |
253 | void *data, | |
fd04897b | 254 | int (*fn)(struct device *dev, void *data)); |
695794ae GKH |
255 | extern struct device *class_find_device(struct class *class, |
256 | struct device *start, void *data, | |
fd04897b | 257 | int (*match)(struct device *, void *)); |
1da177e4 LT |
258 | |
259 | struct class_attribute { | |
d462943a | 260 | struct attribute attr; |
28812fe1 AK |
261 | ssize_t (*show)(struct class *class, struct class_attribute *attr, |
262 | char *buf); | |
263 | ssize_t (*store)(struct class *class, struct class_attribute *attr, | |
264 | const char *buf, size_t count); | |
1da177e4 LT |
265 | }; |
266 | ||
d462943a GKH |
267 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
268 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 269 | |
d462943a GKH |
270 | extern int __must_check class_create_file(struct class *class, |
271 | const struct class_attribute *attr); | |
272 | extern void class_remove_file(struct class *class, | |
273 | const struct class_attribute *attr); | |
1da177e4 | 274 | |
869dfc87 AK |
275 | /* Simple class attribute that is just a static string */ |
276 | ||
277 | struct class_attribute_string { | |
278 | struct class_attribute attr; | |
279 | char *str; | |
280 | }; | |
281 | ||
282 | /* Currently read-only only */ | |
283 | #define _CLASS_ATTR_STRING(_name, _mode, _str) \ | |
284 | { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } | |
285 | #define CLASS_ATTR_STRING(_name, _mode, _str) \ | |
286 | struct class_attribute_string class_attr_##_name = \ | |
287 | _CLASS_ATTR_STRING(_name, _mode, _str) | |
288 | ||
289 | extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, | |
290 | char *buf); | |
291 | ||
1da177e4 LT |
292 | struct class_interface { |
293 | struct list_head node; | |
294 | struct class *class; | |
295 | ||
c47ed219 GKH |
296 | int (*add_dev) (struct device *, struct class_interface *); |
297 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
298 | }; |
299 | ||
4a7fb636 | 300 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
301 | extern void class_interface_unregister(struct class_interface *); |
302 | ||
d2a3b914 MW |
303 | extern struct class * __must_check __class_create(struct module *owner, |
304 | const char *name, | |
305 | struct lock_class_key *key); | |
e9ba6365 | 306 | extern void class_destroy(struct class *cls); |
e9ba6365 | 307 | |
d2a3b914 MW |
308 | /* This is a #define to keep the compiler from merging different |
309 | * instances of the __key variable */ | |
310 | #define class_create(owner, name) \ | |
311 | ({ \ | |
312 | static struct lock_class_key __key; \ | |
313 | __class_create(owner, name, &__key); \ | |
314 | }) | |
315 | ||
414264f9 KS |
316 | /* |
317 | * The type of device, "struct device" is embedded in. A class | |
318 | * or bus can contain devices of different types | |
319 | * like "partitions" and "disks", "mouse" and "event". | |
320 | * This identifies the device type and carries type-specific | |
321 | * information, equivalent to the kobj_type of a kobject. | |
322 | * If "name" is specified, the uevent will contain it in | |
323 | * the DEVTYPE variable. | |
324 | */ | |
f9f852df | 325 | struct device_type { |
414264f9 | 326 | const char *name; |
a4dbd674 | 327 | const struct attribute_group **groups; |
7eff2e7a | 328 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
e454cea2 | 329 | char *(*devnode)(struct device *dev, mode_t *mode); |
f9f852df | 330 | void (*release)(struct device *dev); |
1eede070 | 331 | |
8150f32b | 332 | const struct dev_pm_ops *pm; |
f9f852df KS |
333 | }; |
334 | ||
a7fd6706 KS |
335 | /* interface for exporting device attributes */ |
336 | struct device_attribute { | |
337 | struct attribute attr; | |
338 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
339 | char *buf); | |
340 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
341 | const char *buf, size_t count); | |
342 | }; | |
343 | ||
d462943a GKH |
344 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
345 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
a7fd6706 | 346 | |
4a7fb636 | 347 | extern int __must_check device_create_file(struct device *device, |
66ecb92b | 348 | const struct device_attribute *entry); |
d462943a | 349 | extern void device_remove_file(struct device *dev, |
26579ab7 | 350 | const struct device_attribute *attr); |
2589f188 | 351 | extern int __must_check device_create_bin_file(struct device *dev, |
66ecb92b | 352 | const struct bin_attribute *attr); |
2589f188 | 353 | extern void device_remove_bin_file(struct device *dev, |
66ecb92b | 354 | const struct bin_attribute *attr); |
523ded71 | 355 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 356 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
357 | |
358 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
359 | #define device_schedule_callback(dev, func) \ | |
360 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
361 | |
362 | /* device resource management */ | |
363 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
364 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
365 | ||
366 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 367 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
368 | const char *name); |
369 | #define devres_alloc(release, size, gfp) \ | |
370 | __devres_alloc(release, size, gfp, #release) | |
371 | #else | |
d462943a | 372 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e TH |
373 | #endif |
374 | extern void devres_free(void *res); | |
375 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 376 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 377 | dr_match_t match, void *match_data); |
d462943a GKH |
378 | extern void *devres_get(struct device *dev, void *new_res, |
379 | dr_match_t match, void *match_data); | |
380 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
381 | dr_match_t match, void *match_data); | |
9ac7849e TH |
382 | extern int devres_destroy(struct device *dev, dr_release_t release, |
383 | dr_match_t match, void *match_data); | |
384 | ||
385 | /* devres group */ | |
386 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
387 | gfp_t gfp); | |
388 | extern void devres_close_group(struct device *dev, void *id); | |
389 | extern void devres_remove_group(struct device *dev, void *id); | |
390 | extern int devres_release_group(struct device *dev, void *id); | |
391 | ||
392 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
393 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
394 | extern void devm_kfree(struct device *dev, void *p); | |
395 | ||
6b7b6510 FT |
396 | struct device_dma_parameters { |
397 | /* | |
398 | * a low level driver may set these to teach IOMMU code about | |
399 | * sg limitations. | |
400 | */ | |
401 | unsigned int max_segment_size; | |
402 | unsigned long segment_boundary_mask; | |
403 | }; | |
404 | ||
1da177e4 | 405 | struct device { |
49a4ec18 | 406 | struct device *parent; |
1da177e4 | 407 | |
fb069a5d GKH |
408 | struct device_private *p; |
409 | ||
1da177e4 | 410 | struct kobject kobj; |
c906a48a | 411 | const char *init_name; /* initial name of the device */ |
f9f852df | 412 | struct device_type *type; |
1da177e4 | 413 | |
3142788b | 414 | struct mutex mutex; /* mutex to synchronize calls to |
af70316a | 415 | * its driver. |
416 | */ | |
417 | ||
d462943a | 418 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
419 | struct device_driver *driver; /* which driver has allocated this |
420 | device */ | |
e67c8562 GKH |
421 | void *platform_data; /* Platform specific data, device |
422 | core doesn't touch it */ | |
1da177e4 LT |
423 | struct dev_pm_info power; |
424 | ||
87348136 CH |
425 | #ifdef CONFIG_NUMA |
426 | int numa_node; /* NUMA node this device is close to */ | |
427 | #endif | |
1da177e4 LT |
428 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
429 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
430 | alloc_coherent mappings as | |
431 | not all hardware supports | |
432 | 64 bit addresses for consistent | |
433 | allocations such descriptors. */ | |
434 | ||
6b7b6510 FT |
435 | struct device_dma_parameters *dma_parms; |
436 | ||
1da177e4 LT |
437 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
438 | ||
439 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
440 | override */ | |
c6dbaef2 BH |
441 | /* arch specific additions */ |
442 | struct dev_archdata archdata; | |
d706c1b0 GL |
443 | #ifdef CONFIG_OF |
444 | struct device_node *of_node; | |
445 | #endif | |
1da177e4 | 446 | |
929d2fa5 MW |
447 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
448 | ||
9ac7849e TH |
449 | spinlock_t devres_lock; |
450 | struct list_head devres_head; | |
451 | ||
5a3ceb86 | 452 | struct klist_node knode_class; |
b7a3e813 | 453 | struct class *class; |
a4dbd674 | 454 | const struct attribute_group **groups; /* optional groups */ |
23681e47 | 455 | |
d462943a | 456 | void (*release)(struct device *dev); |
1da177e4 LT |
457 | }; |
458 | ||
9a3df1f7 AS |
459 | /* Get the wakeup routines, which depend on struct device */ |
460 | #include <linux/pm_wakeup.h> | |
461 | ||
bf9ca69f | 462 | static inline const char *dev_name(const struct device *dev) |
06916639 | 463 | { |
a636ee7f PM |
464 | /* Use the init name until the kobject becomes available */ |
465 | if (dev->init_name) | |
466 | return dev->init_name; | |
467 | ||
1fa5ae85 | 468 | return kobject_name(&dev->kobj); |
06916639 KS |
469 | } |
470 | ||
413c239f SR |
471 | extern int dev_set_name(struct device *dev, const char *name, ...) |
472 | __attribute__((format(printf, 2, 3))); | |
473 | ||
87348136 CH |
474 | #ifdef CONFIG_NUMA |
475 | static inline int dev_to_node(struct device *dev) | |
476 | { | |
477 | return dev->numa_node; | |
478 | } | |
479 | static inline void set_dev_node(struct device *dev, int node) | |
480 | { | |
481 | dev->numa_node = node; | |
482 | } | |
483 | #else | |
484 | static inline int dev_to_node(struct device *dev) | |
485 | { | |
486 | return -1; | |
487 | } | |
488 | static inline void set_dev_node(struct device *dev, int node) | |
489 | { | |
490 | } | |
491 | #endif | |
492 | ||
f67f129e ML |
493 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) |
494 | { | |
495 | return dev->kobj.uevent_suppress; | |
496 | } | |
497 | ||
498 | static inline void dev_set_uevent_suppress(struct device *dev, int val) | |
499 | { | |
500 | dev->kobj.uevent_suppress = val; | |
501 | } | |
502 | ||
d305ef5d DR |
503 | static inline int device_is_registered(struct device *dev) |
504 | { | |
3f62e570 | 505 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
506 | } |
507 | ||
5af84b82 RW |
508 | static inline void device_enable_async_suspend(struct device *dev) |
509 | { | |
510 | if (dev->power.status == DPM_ON) | |
511 | dev->power.async_suspend = true; | |
512 | } | |
513 | ||
5a2eb858 RW |
514 | static inline void device_disable_async_suspend(struct device *dev) |
515 | { | |
516 | if (dev->power.status == DPM_ON) | |
517 | dev->power.async_suspend = false; | |
518 | } | |
519 | ||
520 | static inline bool device_async_suspend_enabled(struct device *dev) | |
521 | { | |
522 | return !!dev->power.async_suspend; | |
523 | } | |
524 | ||
8e9394ce GKH |
525 | static inline void device_lock(struct device *dev) |
526 | { | |
3142788b | 527 | mutex_lock(&dev->mutex); |
8e9394ce GKH |
528 | } |
529 | ||
530 | static inline int device_trylock(struct device *dev) | |
531 | { | |
3142788b | 532 | return mutex_trylock(&dev->mutex); |
8e9394ce GKH |
533 | } |
534 | ||
535 | static inline void device_unlock(struct device *dev) | |
536 | { | |
3142788b | 537 | mutex_unlock(&dev->mutex); |
8e9394ce GKH |
538 | } |
539 | ||
1f21782e AB |
540 | void driver_init(void); |
541 | ||
1da177e4 LT |
542 | /* |
543 | * High level routines for use by the bus drivers | |
544 | */ | |
d462943a GKH |
545 | extern int __must_check device_register(struct device *dev); |
546 | extern void device_unregister(struct device *dev); | |
547 | extern void device_initialize(struct device *dev); | |
548 | extern int __must_check device_add(struct device *dev); | |
549 | extern void device_del(struct device *dev); | |
550 | extern int device_for_each_child(struct device *dev, void *data, | |
551 | int (*fn)(struct device *dev, void *data)); | |
552 | extern struct device *device_find_child(struct device *dev, void *data, | |
553 | int (*match)(struct device *dev, void *data)); | |
a2de48ca | 554 | extern int device_rename(struct device *dev, char *new_name); |
ffa6a705 CH |
555 | extern int device_move(struct device *dev, struct device *new_parent, |
556 | enum dpm_order dpm_order); | |
e454cea2 KS |
557 | extern const char *device_get_devnode(struct device *dev, |
558 | mode_t *mode, const char **tmp); | |
b4028437 GKH |
559 | extern void *dev_get_drvdata(const struct device *dev); |
560 | extern void dev_set_drvdata(struct device *dev, void *data); | |
1da177e4 | 561 | |
0aa0dc41 MM |
562 | /* |
563 | * Root device objects for grouping under /sys/devices | |
564 | */ | |
565 | extern struct device *__root_device_register(const char *name, | |
566 | struct module *owner); | |
567 | static inline struct device *root_device_register(const char *name) | |
568 | { | |
569 | return __root_device_register(name, THIS_MODULE); | |
570 | } | |
571 | extern void root_device_unregister(struct device *root); | |
572 | ||
a5b8b1ad MB |
573 | static inline void *dev_get_platdata(const struct device *dev) |
574 | { | |
575 | return dev->platform_data; | |
576 | } | |
577 | ||
1da177e4 LT |
578 | /* |
579 | * Manual binding of a device to driver. See drivers/base/bus.c | |
580 | * for information on use. | |
581 | */ | |
f86db396 | 582 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
583 | extern void device_release_driver(struct device *dev); |
584 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
585 | extern int __must_check driver_attach(struct device_driver *drv); |
586 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 587 | |
23681e47 GKH |
588 | /* |
589 | * Easy functions for dynamically creating devices on the fly | |
590 | */ | |
8882b394 GKH |
591 | extern struct device *device_create_vargs(struct class *cls, |
592 | struct device *parent, | |
593 | dev_t devt, | |
594 | void *drvdata, | |
595 | const char *fmt, | |
596 | va_list vargs); | |
4e106739 GKH |
597 | extern struct device *device_create(struct class *cls, struct device *parent, |
598 | dev_t devt, void *drvdata, | |
599 | const char *fmt, ...) | |
8882b394 | 600 | __attribute__((format(printf, 5, 6))); |
23681e47 | 601 | extern void device_destroy(struct class *cls, dev_t devt); |
1da177e4 | 602 | |
1da177e4 LT |
603 | /* |
604 | * Platform "fixup" functions - allow the platform to have their say | |
605 | * about devices and actions that the general device layer doesn't | |
606 | * know about. | |
607 | */ | |
608 | /* Notify platform of device discovery */ | |
d462943a | 609 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 610 | |
d462943a | 611 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
612 | |
613 | ||
614 | /** | |
615 | * get_device - atomically increment the reference count for the device. | |
616 | * | |
617 | */ | |
d462943a GKH |
618 | extern struct device *get_device(struct device *dev); |
619 | extern void put_device(struct device *dev); | |
1da177e4 | 620 | |
d4d5291c | 621 | extern void wait_for_device_probe(void); |
1da177e4 | 622 | |
2b2af54a KS |
623 | #ifdef CONFIG_DEVTMPFS |
624 | extern int devtmpfs_create_node(struct device *dev); | |
625 | extern int devtmpfs_delete_node(struct device *dev); | |
073120cc | 626 | extern int devtmpfs_mount(const char *mntdir); |
2b2af54a KS |
627 | #else |
628 | static inline int devtmpfs_create_node(struct device *dev) { return 0; } | |
629 | static inline int devtmpfs_delete_node(struct device *dev) { return 0; } | |
630 | static inline int devtmpfs_mount(const char *mountpoint) { return 0; } | |
631 | #endif | |
632 | ||
116f232b | 633 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
634 | extern void device_shutdown(void); |
635 | ||
58b3b71d RW |
636 | /* drivers/base/sys.c */ |
637 | extern void sysdev_shutdown(void); | |
638 | ||
1da177e4 | 639 | /* debugging and troubleshooting/diagnostic helpers. */ |
bf9ca69f | 640 | extern const char *dev_driver_string(const struct device *dev); |
99bcf217 JP |
641 | |
642 | ||
643 | #ifdef CONFIG_PRINTK | |
644 | ||
645 | extern int dev_printk(const char *level, const struct device *dev, | |
646 | const char *fmt, ...) | |
647 | __attribute__ ((format (printf, 3, 4))); | |
648 | extern int dev_emerg(const struct device *dev, const char *fmt, ...) | |
649 | __attribute__ ((format (printf, 2, 3))); | |
650 | extern int dev_alert(const struct device *dev, const char *fmt, ...) | |
651 | __attribute__ ((format (printf, 2, 3))); | |
652 | extern int dev_crit(const struct device *dev, const char *fmt, ...) | |
653 | __attribute__ ((format (printf, 2, 3))); | |
654 | extern int dev_err(const struct device *dev, const char *fmt, ...) | |
655 | __attribute__ ((format (printf, 2, 3))); | |
656 | extern int dev_warn(const struct device *dev, const char *fmt, ...) | |
657 | __attribute__ ((format (printf, 2, 3))); | |
658 | extern int dev_notice(const struct device *dev, const char *fmt, ...) | |
659 | __attribute__ ((format (printf, 2, 3))); | |
660 | extern int _dev_info(const struct device *dev, const char *fmt, ...) | |
661 | __attribute__ ((format (printf, 2, 3))); | |
662 | ||
663 | #else | |
664 | ||
665 | static inline int dev_printk(const char *level, const struct device *dev, | |
666 | const char *fmt, ...) | |
667 | __attribute__ ((format (printf, 3, 4))); | |
668 | static inline int dev_printk(const char *level, const struct device *dev, | |
669 | const char *fmt, ...) | |
670 | { return 0; } | |
671 | ||
672 | static inline int dev_emerg(const struct device *dev, const char *fmt, ...) | |
673 | __attribute__ ((format (printf, 2, 3))); | |
674 | static inline int dev_emerg(const struct device *dev, const char *fmt, ...) | |
675 | { return 0; } | |
676 | static inline int dev_crit(const struct device *dev, const char *fmt, ...) | |
677 | __attribute__ ((format (printf, 2, 3))); | |
678 | static inline int dev_crit(const struct device *dev, const char *fmt, ...) | |
679 | { return 0; } | |
680 | static inline int dev_alert(const struct device *dev, const char *fmt, ...) | |
681 | __attribute__ ((format (printf, 2, 3))); | |
682 | static inline int dev_alert(const struct device *dev, const char *fmt, ...) | |
683 | { return 0; } | |
684 | static inline int dev_err(const struct device *dev, const char *fmt, ...) | |
685 | __attribute__ ((format (printf, 2, 3))); | |
686 | static inline int dev_err(const struct device *dev, const char *fmt, ...) | |
687 | { return 0; } | |
688 | static inline int dev_warn(const struct device *dev, const char *fmt, ...) | |
689 | __attribute__ ((format (printf, 2, 3))); | |
690 | static inline int dev_warn(const struct device *dev, const char *fmt, ...) | |
691 | { return 0; } | |
692 | static inline int dev_notice(const struct device *dev, const char *fmt, ...) | |
693 | __attribute__ ((format (printf, 2, 3))); | |
694 | static inline int dev_notice(const struct device *dev, const char *fmt, ...) | |
695 | { return 0; } | |
696 | static inline int _dev_info(const struct device *dev, const char *fmt, ...) | |
697 | __attribute__ ((format (printf, 2, 3))); | |
698 | static inline int _dev_info(const struct device *dev, const char *fmt, ...) | |
699 | { return 0; } | |
700 | ||
701 | #endif | |
702 | ||
703 | /* | |
704 | * Stupid hackaround for existing uses of non-printk uses dev_info | |
705 | * | |
706 | * Note that the definition of dev_info below is actually _dev_info | |
707 | * and a macro is used to avoid redefining dev_info | |
708 | */ | |
709 | ||
710 | #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg) | |
7b8712e5 | 711 | |
d0d85ff9 CH |
712 | #if defined(DEBUG) |
713 | #define dev_dbg(dev, format, arg...) \ | |
99bcf217 | 714 | dev_printk(KERN_DEBUG, dev, format, ##arg) |
e9d376f0 | 715 | #elif defined(CONFIG_DYNAMIC_DEBUG) |
99bcf217 JP |
716 | #define dev_dbg(dev, format, ...) \ |
717 | do { \ | |
346e15be | 718 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ |
99bcf217 | 719 | } while (0) |
1da177e4 | 720 | #else |
99bcf217 JP |
721 | #define dev_dbg(dev, format, arg...) \ |
722 | ({ \ | |
723 | if (0) \ | |
724 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
725 | 0; \ | |
726 | }) | |
1da177e4 LT |
727 | #endif |
728 | ||
aebdc3b4 DB |
729 | #ifdef VERBOSE_DEBUG |
730 | #define dev_vdbg dev_dbg | |
731 | #else | |
99bcf217 JP |
732 | #define dev_vdbg(dev, format, arg...) \ |
733 | ({ \ | |
734 | if (0) \ | |
735 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
736 | 0; \ | |
737 | }) | |
aebdc3b4 DB |
738 | #endif |
739 | ||
e6139662 AV |
740 | /* |
741 | * dev_WARN() acts like dev_printk(), but with the key difference | |
742 | * of using a WARN/WARN_ON to get the message out, including the | |
743 | * file/line information and a backtrace. | |
744 | */ | |
745 | #define dev_WARN(dev, format, arg...) \ | |
746 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
747 | ||
1da177e4 LT |
748 | /* Create alias, so I can be autoloaded. */ |
749 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
750 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
751 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
752 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
753 | #endif /* _DEVICE_H_ */ |