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1 | /* | |
2 | * device.h - generic, centralized driver model | |
3 | * | |
4 | * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org> | |
5 | * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de> | |
6 | * Copyright (c) 2008-2009 Novell Inc. | |
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 | ||
16 | #include <linux/ioport.h> | |
17 | #include <linux/kobject.h> | |
18 | #include <linux/klist.h> | |
19 | #include <linux/list.h> | |
20 | #include <linux/lockdep.h> | |
21 | #include <linux/compiler.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/pm.h> | |
25 | #include <asm/atomic.h> | |
26 | #include <asm/device.h> | |
27 | ||
28 | struct device; | |
29 | struct device_private; | |
30 | struct device_driver; | |
31 | struct driver_private; | |
32 | struct class; | |
33 | struct class_private; | |
34 | struct bus_type; | |
35 | struct bus_type_private; | |
36 | struct device_node; | |
37 | ||
38 | struct bus_attribute { | |
39 | struct attribute attr; | |
40 | ssize_t (*show)(struct bus_type *bus, char *buf); | |
41 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); | |
42 | }; | |
43 | ||
44 | #define BUS_ATTR(_name, _mode, _show, _store) \ | |
45 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
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 *); | |
50 | ||
51 | struct bus_type { | |
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 (*resume)(struct device *dev); | |
65 | ||
66 | const struct dev_pm_ops *pm; | |
67 | ||
68 | struct bus_type_private *p; | |
69 | }; | |
70 | ||
71 | extern int __must_check bus_register(struct bus_type *bus); | |
72 | extern void bus_unregister(struct bus_type *bus); | |
73 | ||
74 | extern int __must_check bus_rescan_devices(struct bus_type *bus); | |
75 | ||
76 | /* iterator helpers for buses */ | |
77 | ||
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)); | |
83 | struct device *bus_find_device_by_name(struct bus_type *bus, | |
84 | struct device *start, | |
85 | const char *name); | |
86 | ||
87 | int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, | |
88 | void *data, int (*fn)(struct device_driver *, void *)); | |
89 | ||
90 | void bus_sort_breadthfirst(struct bus_type *bus, | |
91 | int (*compare)(const struct device *a, | |
92 | const struct device *b)); | |
93 | /* | |
94 | * Bus notifiers: Get notified of addition/removal of devices | |
95 | * and binding/unbinding of drivers to devices. | |
96 | * In the long run, it should be a replacement for the platform | |
97 | * notify hooks. | |
98 | */ | |
99 | struct notifier_block; | |
100 | ||
101 | extern int bus_register_notifier(struct bus_type *bus, | |
102 | struct notifier_block *nb); | |
103 | extern int bus_unregister_notifier(struct bus_type *bus, | |
104 | struct notifier_block *nb); | |
105 | ||
106 | /* All 4 notifers below get called with the target struct device * | |
107 | * as an argument. Note that those functions are likely to be called | |
108 | * with the device lock held in the core, so be careful. | |
109 | */ | |
110 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
111 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
112 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
113 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
114 | unbound */ | |
115 | #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound | |
116 | from the device */ | |
117 | ||
118 | extern struct kset *bus_get_kset(struct bus_type *bus); | |
119 | extern struct klist *bus_get_device_klist(struct bus_type *bus); | |
120 | ||
121 | struct device_driver { | |
122 | const char *name; | |
123 | struct bus_type *bus; | |
124 | ||
125 | struct module *owner; | |
126 | const char *mod_name; /* used for built-in modules */ | |
127 | ||
128 | bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ | |
129 | ||
130 | #if defined(CONFIG_OF) | |
131 | const struct of_device_id *of_match_table; | |
132 | #endif | |
133 | ||
134 | int (*probe) (struct device *dev); | |
135 | int (*remove) (struct device *dev); | |
136 | void (*shutdown) (struct device *dev); | |
137 | int (*suspend) (struct device *dev, pm_message_t state); | |
138 | int (*resume) (struct device *dev); | |
139 | const struct attribute_group **groups; | |
140 | ||
141 | const struct dev_pm_ops *pm; | |
142 | ||
143 | struct driver_private *p; | |
144 | }; | |
145 | ||
146 | ||
147 | extern int __must_check driver_register(struct device_driver *drv); | |
148 | extern void driver_unregister(struct device_driver *drv); | |
149 | ||
150 | extern struct device_driver *get_driver(struct device_driver *drv); | |
151 | extern void put_driver(struct device_driver *drv); | |
152 | extern struct device_driver *driver_find(const char *name, | |
153 | struct bus_type *bus); | |
154 | extern int driver_probe_done(void); | |
155 | extern void wait_for_device_probe(void); | |
156 | ||
157 | ||
158 | /* sysfs interface for exporting driver attributes */ | |
159 | ||
160 | struct driver_attribute { | |
161 | struct attribute attr; | |
162 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
163 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
164 | size_t count); | |
165 | }; | |
166 | ||
167 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ | |
168 | struct driver_attribute driver_attr_##_name = \ | |
169 | __ATTR(_name, _mode, _show, _store) | |
170 | ||
171 | extern int __must_check driver_create_file(struct device_driver *driver, | |
172 | const struct driver_attribute *attr); | |
173 | extern void driver_remove_file(struct device_driver *driver, | |
174 | const struct driver_attribute *attr); | |
175 | ||
176 | extern int __must_check driver_add_kobj(struct device_driver *drv, | |
177 | struct kobject *kobj, | |
178 | const char *fmt, ...); | |
179 | ||
180 | extern int __must_check driver_for_each_device(struct device_driver *drv, | |
181 | struct device *start, | |
182 | void *data, | |
183 | int (*fn)(struct device *dev, | |
184 | void *)); | |
185 | struct device *driver_find_device(struct device_driver *drv, | |
186 | struct device *start, void *data, | |
187 | int (*match)(struct device *dev, void *data)); | |
188 | ||
189 | /* | |
190 | * device classes | |
191 | */ | |
192 | struct class { | |
193 | const char *name; | |
194 | struct module *owner; | |
195 | ||
196 | struct class_attribute *class_attrs; | |
197 | struct device_attribute *dev_attrs; | |
198 | struct kobject *dev_kobj; | |
199 | ||
200 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); | |
201 | char *(*devnode)(struct device *dev, mode_t *mode); | |
202 | ||
203 | void (*class_release)(struct class *class); | |
204 | void (*dev_release)(struct device *dev); | |
205 | ||
206 | int (*suspend)(struct device *dev, pm_message_t state); | |
207 | int (*resume)(struct device *dev); | |
208 | ||
209 | const struct kobj_ns_type_operations *ns_type; | |
210 | const void *(*namespace)(struct device *dev); | |
211 | ||
212 | const struct dev_pm_ops *pm; | |
213 | ||
214 | struct class_private *p; | |
215 | }; | |
216 | ||
217 | struct class_dev_iter { | |
218 | struct klist_iter ki; | |
219 | const struct device_type *type; | |
220 | }; | |
221 | ||
222 | extern struct kobject *sysfs_dev_block_kobj; | |
223 | extern struct kobject *sysfs_dev_char_kobj; | |
224 | extern int __must_check __class_register(struct class *class, | |
225 | struct lock_class_key *key); | |
226 | extern void class_unregister(struct class *class); | |
227 | ||
228 | /* This is a #define to keep the compiler from merging different | |
229 | * instances of the __key variable */ | |
230 | #define class_register(class) \ | |
231 | ({ \ | |
232 | static struct lock_class_key __key; \ | |
233 | __class_register(class, &__key); \ | |
234 | }) | |
235 | ||
236 | struct class_compat; | |
237 | struct class_compat *class_compat_register(const char *name); | |
238 | void class_compat_unregister(struct class_compat *cls); | |
239 | int class_compat_create_link(struct class_compat *cls, struct device *dev, | |
240 | struct device *device_link); | |
241 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, | |
242 | struct device *device_link); | |
243 | ||
244 | extern void class_dev_iter_init(struct class_dev_iter *iter, | |
245 | struct class *class, | |
246 | struct device *start, | |
247 | const struct device_type *type); | |
248 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
249 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
250 | ||
251 | extern int class_for_each_device(struct class *class, struct device *start, | |
252 | void *data, | |
253 | int (*fn)(struct device *dev, void *data)); | |
254 | extern struct device *class_find_device(struct class *class, | |
255 | struct device *start, void *data, | |
256 | int (*match)(struct device *, void *)); | |
257 | ||
258 | struct class_attribute { | |
259 | struct attribute attr; | |
260 | ssize_t (*show)(struct class *class, struct class_attribute *attr, | |
261 | char *buf); | |
262 | ssize_t (*store)(struct class *class, struct class_attribute *attr, | |
263 | const char *buf, size_t count); | |
264 | }; | |
265 | ||
266 | #define CLASS_ATTR(_name, _mode, _show, _store) \ | |
267 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
268 | ||
269 | extern int __must_check class_create_file(struct class *class, | |
270 | const struct class_attribute *attr); | |
271 | extern void class_remove_file(struct class *class, | |
272 | const struct class_attribute *attr); | |
273 | ||
274 | /* Simple class attribute that is just a static string */ | |
275 | ||
276 | struct class_attribute_string { | |
277 | struct class_attribute attr; | |
278 | char *str; | |
279 | }; | |
280 | ||
281 | /* Currently read-only only */ | |
282 | #define _CLASS_ATTR_STRING(_name, _mode, _str) \ | |
283 | { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } | |
284 | #define CLASS_ATTR_STRING(_name, _mode, _str) \ | |
285 | struct class_attribute_string class_attr_##_name = \ | |
286 | _CLASS_ATTR_STRING(_name, _mode, _str) | |
287 | ||
288 | extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, | |
289 | char *buf); | |
290 | ||
291 | struct class_interface { | |
292 | struct list_head node; | |
293 | struct class *class; | |
294 | ||
295 | int (*add_dev) (struct device *, struct class_interface *); | |
296 | void (*remove_dev) (struct device *, struct class_interface *); | |
297 | }; | |
298 | ||
299 | extern int __must_check class_interface_register(struct class_interface *); | |
300 | extern void class_interface_unregister(struct class_interface *); | |
301 | ||
302 | extern struct class * __must_check __class_create(struct module *owner, | |
303 | const char *name, | |
304 | struct lock_class_key *key); | |
305 | extern void class_destroy(struct class *cls); | |
306 | ||
307 | /* This is a #define to keep the compiler from merging different | |
308 | * instances of the __key variable */ | |
309 | #define class_create(owner, name) \ | |
310 | ({ \ | |
311 | static struct lock_class_key __key; \ | |
312 | __class_create(owner, name, &__key); \ | |
313 | }) | |
314 | ||
315 | /* | |
316 | * The type of device, "struct device" is embedded in. A class | |
317 | * or bus can contain devices of different types | |
318 | * like "partitions" and "disks", "mouse" and "event". | |
319 | * This identifies the device type and carries type-specific | |
320 | * information, equivalent to the kobj_type of a kobject. | |
321 | * If "name" is specified, the uevent will contain it in | |
322 | * the DEVTYPE variable. | |
323 | */ | |
324 | struct device_type { | |
325 | const char *name; | |
326 | const struct attribute_group **groups; | |
327 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
328 | char *(*devnode)(struct device *dev, mode_t *mode); | |
329 | void (*release)(struct device *dev); | |
330 | ||
331 | const struct dev_pm_ops *pm; | |
332 | }; | |
333 | ||
334 | /* interface for exporting device attributes */ | |
335 | struct device_attribute { | |
336 | struct attribute attr; | |
337 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
338 | char *buf); | |
339 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
340 | const char *buf, size_t count); | |
341 | }; | |
342 | ||
343 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ | |
344 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
345 | ||
346 | extern int __must_check device_create_file(struct device *device, | |
347 | const struct device_attribute *entry); | |
348 | extern void device_remove_file(struct device *dev, | |
349 | const struct device_attribute *attr); | |
350 | extern int __must_check device_create_bin_file(struct device *dev, | |
351 | const struct bin_attribute *attr); | |
352 | extern void device_remove_bin_file(struct device *dev, | |
353 | const struct bin_attribute *attr); | |
354 | extern int device_schedule_callback_owner(struct device *dev, | |
355 | void (*func)(struct device *dev), struct module *owner); | |
356 | ||
357 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
358 | #define device_schedule_callback(dev, func) \ | |
359 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
360 | ||
361 | /* device resource management */ | |
362 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
363 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
364 | ||
365 | #ifdef CONFIG_DEBUG_DEVRES | |
366 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, | |
367 | const char *name); | |
368 | #define devres_alloc(release, size, gfp) \ | |
369 | __devres_alloc(release, size, gfp, #release) | |
370 | #else | |
371 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); | |
372 | #endif | |
373 | extern void devres_free(void *res); | |
374 | extern void devres_add(struct device *dev, void *res); | |
375 | extern void *devres_find(struct device *dev, dr_release_t release, | |
376 | dr_match_t match, void *match_data); | |
377 | extern void *devres_get(struct device *dev, void *new_res, | |
378 | dr_match_t match, void *match_data); | |
379 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
380 | dr_match_t match, void *match_data); | |
381 | extern int devres_destroy(struct device *dev, dr_release_t release, | |
382 | dr_match_t match, void *match_data); | |
383 | ||
384 | /* devres group */ | |
385 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
386 | gfp_t gfp); | |
387 | extern void devres_close_group(struct device *dev, void *id); | |
388 | extern void devres_remove_group(struct device *dev, void *id); | |
389 | extern int devres_release_group(struct device *dev, void *id); | |
390 | ||
391 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
392 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
393 | extern void devm_kfree(struct device *dev, void *p); | |
394 | ||
395 | struct device_dma_parameters { | |
396 | /* | |
397 | * a low level driver may set these to teach IOMMU code about | |
398 | * sg limitations. | |
399 | */ | |
400 | unsigned int max_segment_size; | |
401 | unsigned long segment_boundary_mask; | |
402 | }; | |
403 | ||
404 | struct device { | |
405 | struct device *parent; | |
406 | ||
407 | struct device_private *p; | |
408 | ||
409 | struct kobject kobj; | |
410 | const char *init_name; /* initial name of the device */ | |
411 | struct device_type *type; | |
412 | ||
413 | struct mutex mutex; /* mutex to synchronize calls to | |
414 | * its driver. | |
415 | */ | |
416 | ||
417 | struct bus_type *bus; /* type of bus device is on */ | |
418 | struct device_driver *driver; /* which driver has allocated this | |
419 | device */ | |
420 | void *platform_data; /* Platform specific data, device | |
421 | core doesn't touch it */ | |
422 | struct dev_pm_info power; | |
423 | ||
424 | #ifdef CONFIG_NUMA | |
425 | int numa_node; /* NUMA node this device is close to */ | |
426 | #endif | |
427 | u64 *dma_mask; /* dma mask (if dma'able device) */ | |
428 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
429 | alloc_coherent mappings as | |
430 | not all hardware supports | |
431 | 64 bit addresses for consistent | |
432 | allocations such descriptors. */ | |
433 | ||
434 | struct device_dma_parameters *dma_parms; | |
435 | ||
436 | struct list_head dma_pools; /* dma pools (if dma'ble) */ | |
437 | ||
438 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
439 | override */ | |
440 | /* arch specific additions */ | |
441 | struct dev_archdata archdata; | |
442 | #ifdef CONFIG_OF | |
443 | struct device_node *of_node; | |
444 | #endif | |
445 | ||
446 | dev_t devt; /* dev_t, creates the sysfs "dev" */ | |
447 | ||
448 | spinlock_t devres_lock; | |
449 | struct list_head devres_head; | |
450 | ||
451 | struct klist_node knode_class; | |
452 | struct class *class; | |
453 | const struct attribute_group **groups; /* optional groups */ | |
454 | ||
455 | void (*release)(struct device *dev); | |
456 | }; | |
457 | ||
458 | /* Get the wakeup routines, which depend on struct device */ | |
459 | #include <linux/pm_wakeup.h> | |
460 | ||
461 | static inline const char *dev_name(const struct device *dev) | |
462 | { | |
463 | /* Use the init name until the kobject becomes available */ | |
464 | if (dev->init_name) | |
465 | return dev->init_name; | |
466 | ||
467 | return kobject_name(&dev->kobj); | |
468 | } | |
469 | ||
470 | extern int dev_set_name(struct device *dev, const char *name, ...) | |
471 | __attribute__((format(printf, 2, 3))); | |
472 | ||
473 | #ifdef CONFIG_NUMA | |
474 | static inline int dev_to_node(struct device *dev) | |
475 | { | |
476 | return dev->numa_node; | |
477 | } | |
478 | static inline void set_dev_node(struct device *dev, int node) | |
479 | { | |
480 | dev->numa_node = node; | |
481 | } | |
482 | #else | |
483 | static inline int dev_to_node(struct device *dev) | |
484 | { | |
485 | return -1; | |
486 | } | |
487 | static inline void set_dev_node(struct device *dev, int node) | |
488 | { | |
489 | } | |
490 | #endif | |
491 | ||
492 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) | |
493 | { | |
494 | return dev->kobj.uevent_suppress; | |
495 | } | |
496 | ||
497 | static inline void dev_set_uevent_suppress(struct device *dev, int val) | |
498 | { | |
499 | dev->kobj.uevent_suppress = val; | |
500 | } | |
501 | ||
502 | static inline int device_is_registered(struct device *dev) | |
503 | { | |
504 | return dev->kobj.state_in_sysfs; | |
505 | } | |
506 | ||
507 | static inline void device_enable_async_suspend(struct device *dev) | |
508 | { | |
509 | if (dev->power.status == DPM_ON) | |
510 | dev->power.async_suspend = true; | |
511 | } | |
512 | ||
513 | static inline void device_disable_async_suspend(struct device *dev) | |
514 | { | |
515 | if (dev->power.status == DPM_ON) | |
516 | dev->power.async_suspend = false; | |
517 | } | |
518 | ||
519 | static inline bool device_async_suspend_enabled(struct device *dev) | |
520 | { | |
521 | return !!dev->power.async_suspend; | |
522 | } | |
523 | ||
524 | static inline void device_lock(struct device *dev) | |
525 | { | |
526 | mutex_lock(&dev->mutex); | |
527 | } | |
528 | ||
529 | static inline int device_trylock(struct device *dev) | |
530 | { | |
531 | return mutex_trylock(&dev->mutex); | |
532 | } | |
533 | ||
534 | static inline void device_unlock(struct device *dev) | |
535 | { | |
536 | mutex_unlock(&dev->mutex); | |
537 | } | |
538 | ||
539 | void driver_init(void); | |
540 | ||
541 | /* | |
542 | * High level routines for use by the bus drivers | |
543 | */ | |
544 | extern int __must_check device_register(struct device *dev); | |
545 | extern void device_unregister(struct device *dev); | |
546 | extern void device_initialize(struct device *dev); | |
547 | extern int __must_check device_add(struct device *dev); | |
548 | extern void device_del(struct device *dev); | |
549 | extern int device_for_each_child(struct device *dev, void *data, | |
550 | int (*fn)(struct device *dev, void *data)); | |
551 | extern struct device *device_find_child(struct device *dev, void *data, | |
552 | int (*match)(struct device *dev, void *data)); | |
553 | extern int device_rename(struct device *dev, char *new_name); | |
554 | extern int device_move(struct device *dev, struct device *new_parent, | |
555 | enum dpm_order dpm_order); | |
556 | extern const char *device_get_devnode(struct device *dev, | |
557 | mode_t *mode, const char **tmp); | |
558 | extern void *dev_get_drvdata(const struct device *dev); | |
559 | extern void dev_set_drvdata(struct device *dev, void *data); | |
560 | ||
561 | /* | |
562 | * Root device objects for grouping under /sys/devices | |
563 | */ | |
564 | extern struct device *__root_device_register(const char *name, | |
565 | struct module *owner); | |
566 | static inline struct device *root_device_register(const char *name) | |
567 | { | |
568 | return __root_device_register(name, THIS_MODULE); | |
569 | } | |
570 | extern void root_device_unregister(struct device *root); | |
571 | ||
572 | static inline void *dev_get_platdata(const struct device *dev) | |
573 | { | |
574 | return dev->platform_data; | |
575 | } | |
576 | ||
577 | /* | |
578 | * Manual binding of a device to driver. See drivers/base/bus.c | |
579 | * for information on use. | |
580 | */ | |
581 | extern int __must_check device_bind_driver(struct device *dev); | |
582 | extern void device_release_driver(struct device *dev); | |
583 | extern int __must_check device_attach(struct device *dev); | |
584 | extern int __must_check driver_attach(struct device_driver *drv); | |
585 | extern int __must_check device_reprobe(struct device *dev); | |
586 | ||
587 | /* | |
588 | * Easy functions for dynamically creating devices on the fly | |
589 | */ | |
590 | extern struct device *device_create_vargs(struct class *cls, | |
591 | struct device *parent, | |
592 | dev_t devt, | |
593 | void *drvdata, | |
594 | const char *fmt, | |
595 | va_list vargs); | |
596 | extern struct device *device_create(struct class *cls, struct device *parent, | |
597 | dev_t devt, void *drvdata, | |
598 | const char *fmt, ...) | |
599 | __attribute__((format(printf, 5, 6))); | |
600 | extern void device_destroy(struct class *cls, dev_t devt); | |
601 | ||
602 | /* | |
603 | * Platform "fixup" functions - allow the platform to have their say | |
604 | * about devices and actions that the general device layer doesn't | |
605 | * know about. | |
606 | */ | |
607 | /* Notify platform of device discovery */ | |
608 | extern int (*platform_notify)(struct device *dev); | |
609 | ||
610 | extern int (*platform_notify_remove)(struct device *dev); | |
611 | ||
612 | ||
613 | /** | |
614 | * get_device - atomically increment the reference count for the device. | |
615 | * | |
616 | */ | |
617 | extern struct device *get_device(struct device *dev); | |
618 | extern void put_device(struct device *dev); | |
619 | ||
620 | extern void wait_for_device_probe(void); | |
621 | ||
622 | #ifdef CONFIG_DEVTMPFS | |
623 | extern int devtmpfs_create_node(struct device *dev); | |
624 | extern int devtmpfs_delete_node(struct device *dev); | |
625 | extern int devtmpfs_mount(const char *mntdir); | |
626 | #else | |
627 | static inline int devtmpfs_create_node(struct device *dev) { return 0; } | |
628 | static inline int devtmpfs_delete_node(struct device *dev) { return 0; } | |
629 | static inline int devtmpfs_mount(const char *mountpoint) { return 0; } | |
630 | #endif | |
631 | ||
632 | /* drivers/base/power/shutdown.c */ | |
633 | extern void device_shutdown(void); | |
634 | ||
635 | /* drivers/base/sys.c */ | |
636 | extern void sysdev_shutdown(void); | |
637 | ||
638 | /* debugging and troubleshooting/diagnostic helpers. */ | |
639 | extern const char *dev_driver_string(const struct device *dev); | |
640 | ||
641 | ||
642 | #ifdef CONFIG_PRINTK | |
643 | ||
644 | extern int dev_printk(const char *level, const struct device *dev, | |
645 | const char *fmt, ...) | |
646 | __attribute__ ((format (printf, 3, 4))); | |
647 | extern int dev_emerg(const struct device *dev, const char *fmt, ...) | |
648 | __attribute__ ((format (printf, 2, 3))); | |
649 | extern int dev_alert(const struct device *dev, const char *fmt, ...) | |
650 | __attribute__ ((format (printf, 2, 3))); | |
651 | extern int dev_crit(const struct device *dev, const char *fmt, ...) | |
652 | __attribute__ ((format (printf, 2, 3))); | |
653 | extern int dev_err(const struct device *dev, const char *fmt, ...) | |
654 | __attribute__ ((format (printf, 2, 3))); | |
655 | extern int dev_warn(const struct device *dev, const char *fmt, ...) | |
656 | __attribute__ ((format (printf, 2, 3))); | |
657 | extern int dev_notice(const struct device *dev, const char *fmt, ...) | |
658 | __attribute__ ((format (printf, 2, 3))); | |
659 | extern int _dev_info(const struct device *dev, const char *fmt, ...) | |
660 | __attribute__ ((format (printf, 2, 3))); | |
661 | ||
662 | #else | |
663 | ||
664 | static inline int dev_printk(const char *level, const struct device *dev, | |
665 | const char *fmt, ...) | |
666 | __attribute__ ((format (printf, 3, 4))); | |
667 | static inline int dev_printk(const char *level, const struct device *dev, | |
668 | const char *fmt, ...) | |
669 | { return 0; } | |
670 | ||
671 | static inline int dev_emerg(const struct device *dev, const char *fmt, ...) | |
672 | __attribute__ ((format (printf, 2, 3))); | |
673 | static inline int dev_emerg(const struct device *dev, const char *fmt, ...) | |
674 | { return 0; } | |
675 | static inline int dev_crit(const struct device *dev, const char *fmt, ...) | |
676 | __attribute__ ((format (printf, 2, 3))); | |
677 | static inline int dev_crit(const struct device *dev, const char *fmt, ...) | |
678 | { return 0; } | |
679 | static inline int dev_alert(const struct device *dev, const char *fmt, ...) | |
680 | __attribute__ ((format (printf, 2, 3))); | |
681 | static inline int dev_alert(const struct device *dev, const char *fmt, ...) | |
682 | { return 0; } | |
683 | static inline int dev_err(const struct device *dev, const char *fmt, ...) | |
684 | __attribute__ ((format (printf, 2, 3))); | |
685 | static inline int dev_err(const struct device *dev, const char *fmt, ...) | |
686 | { return 0; } | |
687 | static inline int dev_warn(const struct device *dev, const char *fmt, ...) | |
688 | __attribute__ ((format (printf, 2, 3))); | |
689 | static inline int dev_warn(const struct device *dev, const char *fmt, ...) | |
690 | { return 0; } | |
691 | static inline int dev_notice(const struct device *dev, const char *fmt, ...) | |
692 | __attribute__ ((format (printf, 2, 3))); | |
693 | static inline int dev_notice(const struct device *dev, const char *fmt, ...) | |
694 | { return 0; } | |
695 | static inline int _dev_info(const struct device *dev, const char *fmt, ...) | |
696 | __attribute__ ((format (printf, 2, 3))); | |
697 | static inline int _dev_info(const struct device *dev, const char *fmt, ...) | |
698 | { return 0; } | |
699 | ||
700 | #endif | |
701 | ||
702 | /* | |
703 | * Stupid hackaround for existing uses of non-printk uses dev_info | |
704 | * | |
705 | * Note that the definition of dev_info below is actually _dev_info | |
706 | * and a macro is used to avoid redefining dev_info | |
707 | */ | |
708 | ||
709 | #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg) | |
710 | ||
711 | #if defined(DEBUG) | |
712 | #define dev_dbg(dev, format, arg...) \ | |
713 | dev_printk(KERN_DEBUG, dev, format, ##arg) | |
714 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
715 | #define dev_dbg(dev, format, ...) \ | |
716 | do { \ | |
717 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ | |
718 | } while (0) | |
719 | #else | |
720 | #define dev_dbg(dev, format, arg...) \ | |
721 | ({ \ | |
722 | if (0) \ | |
723 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
724 | 0; \ | |
725 | }) | |
726 | #endif | |
727 | ||
728 | #ifdef VERBOSE_DEBUG | |
729 | #define dev_vdbg dev_dbg | |
730 | #else | |
731 | #define dev_vdbg(dev, format, arg...) \ | |
732 | ({ \ | |
733 | if (0) \ | |
734 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
735 | 0; \ | |
736 | }) | |
737 | #endif | |
738 | ||
739 | /* | |
740 | * dev_WARN() acts like dev_printk(), but with the key difference | |
741 | * of using a WARN/WARN_ON to get the message out, including the | |
742 | * file/line information and a backtrace. | |
743 | */ | |
744 | #define dev_WARN(dev, format, arg...) \ | |
745 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
746 | ||
747 | /* Create alias, so I can be autoloaded. */ | |
748 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
749 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
750 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
751 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
752 | #endif /* _DEVICE_H_ */ |