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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/mutex.h> | |
24 | #include <linux/pm.h> | |
25 | #include <linux/atomic.h> | |
26 | #include <linux/ratelimit.h> | |
27 | #include <asm/device.h> | |
28 | ||
29 | struct device; | |
30 | struct device_private; | |
31 | struct device_driver; | |
32 | struct driver_private; | |
33 | struct module; | |
34 | struct class; | |
35 | struct subsys_private; | |
36 | struct bus_type; | |
37 | struct device_node; | |
38 | struct iommu_ops; | |
39 | struct iommu_group; | |
40 | ||
41 | struct bus_attribute { | |
42 | struct attribute attr; | |
43 | ssize_t (*show)(struct bus_type *bus, char *buf); | |
44 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); | |
45 | }; | |
46 | ||
47 | #define BUS_ATTR(_name, _mode, _show, _store) \ | |
48 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
49 | ||
50 | extern int __must_check bus_create_file(struct bus_type *, | |
51 | struct bus_attribute *); | |
52 | extern void bus_remove_file(struct bus_type *, struct bus_attribute *); | |
53 | ||
54 | /** | |
55 | * struct bus_type - The bus type of the device | |
56 | * | |
57 | * @name: The name of the bus. | |
58 | * @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id). | |
59 | * @dev_root: Default device to use as the parent. | |
60 | * @bus_attrs: Default attributes of the bus. | |
61 | * @dev_attrs: Default attributes of the devices on the bus. | |
62 | * @drv_attrs: Default attributes of the device drivers on the bus. | |
63 | * @match: Called, perhaps multiple times, whenever a new device or driver | |
64 | * is added for this bus. It should return a nonzero value if the | |
65 | * given device can be handled by the given driver. | |
66 | * @uevent: Called when a device is added, removed, or a few other things | |
67 | * that generate uevents to add the environment variables. | |
68 | * @probe: Called when a new device or driver add to this bus, and callback | |
69 | * the specific driver's probe to initial the matched device. | |
70 | * @remove: Called when a device removed from this bus. | |
71 | * @shutdown: Called at shut-down time to quiesce the device. | |
72 | * @suspend: Called when a device on this bus wants to go to sleep mode. | |
73 | * @resume: Called to bring a device on this bus out of sleep mode. | |
74 | * @pm: Power management operations of this bus, callback the specific | |
75 | * device driver's pm-ops. | |
76 | * @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU | |
77 | * driver implementations to a bus and allow the driver to do | |
78 | * bus-specific setup | |
79 | * @p: The private data of the driver core, only the driver core can | |
80 | * touch this. | |
81 | * | |
82 | * A bus is a channel between the processor and one or more devices. For the | |
83 | * purposes of the device model, all devices are connected via a bus, even if | |
84 | * it is an internal, virtual, "platform" bus. Buses can plug into each other. | |
85 | * A USB controller is usually a PCI device, for example. The device model | |
86 | * represents the actual connections between buses and the devices they control. | |
87 | * A bus is represented by the bus_type structure. It contains the name, the | |
88 | * default attributes, the bus' methods, PM operations, and the driver core's | |
89 | * private data. | |
90 | */ | |
91 | struct bus_type { | |
92 | const char *name; | |
93 | const char *dev_name; | |
94 | struct device *dev_root; | |
95 | struct bus_attribute *bus_attrs; | |
96 | struct device_attribute *dev_attrs; | |
97 | struct driver_attribute *drv_attrs; | |
98 | ||
99 | int (*match)(struct device *dev, struct device_driver *drv); | |
100 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
101 | int (*probe)(struct device *dev); | |
102 | int (*remove)(struct device *dev); | |
103 | void (*shutdown)(struct device *dev); | |
104 | ||
105 | int (*suspend)(struct device *dev, pm_message_t state); | |
106 | int (*resume)(struct device *dev); | |
107 | ||
108 | const struct dev_pm_ops *pm; | |
109 | ||
110 | struct iommu_ops *iommu_ops; | |
111 | ||
112 | struct subsys_private *p; | |
113 | }; | |
114 | ||
115 | /* This is a #define to keep the compiler from merging different | |
116 | * instances of the __key variable */ | |
117 | #define bus_register(subsys) \ | |
118 | ({ \ | |
119 | static struct lock_class_key __key; \ | |
120 | __bus_register(subsys, &__key); \ | |
121 | }) | |
122 | extern int __must_check __bus_register(struct bus_type *bus, | |
123 | struct lock_class_key *key); | |
124 | extern void bus_unregister(struct bus_type *bus); | |
125 | ||
126 | extern int __must_check bus_rescan_devices(struct bus_type *bus); | |
127 | ||
128 | /* iterator helpers for buses */ | |
129 | struct subsys_dev_iter { | |
130 | struct klist_iter ki; | |
131 | const struct device_type *type; | |
132 | }; | |
133 | void subsys_dev_iter_init(struct subsys_dev_iter *iter, | |
134 | struct bus_type *subsys, | |
135 | struct device *start, | |
136 | const struct device_type *type); | |
137 | struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter); | |
138 | void subsys_dev_iter_exit(struct subsys_dev_iter *iter); | |
139 | ||
140 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, | |
141 | int (*fn)(struct device *dev, void *data)); | |
142 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
143 | void *data, | |
144 | int (*match)(struct device *dev, void *data)); | |
145 | struct device *bus_find_device_by_name(struct bus_type *bus, | |
146 | struct device *start, | |
147 | const char *name); | |
148 | struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id, | |
149 | struct device *hint); | |
150 | int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, | |
151 | void *data, int (*fn)(struct device_driver *, void *)); | |
152 | void bus_sort_breadthfirst(struct bus_type *bus, | |
153 | int (*compare)(const struct device *a, | |
154 | const struct device *b)); | |
155 | /* | |
156 | * Bus notifiers: Get notified of addition/removal of devices | |
157 | * and binding/unbinding of drivers to devices. | |
158 | * In the long run, it should be a replacement for the platform | |
159 | * notify hooks. | |
160 | */ | |
161 | struct notifier_block; | |
162 | ||
163 | extern int bus_register_notifier(struct bus_type *bus, | |
164 | struct notifier_block *nb); | |
165 | extern int bus_unregister_notifier(struct bus_type *bus, | |
166 | struct notifier_block *nb); | |
167 | ||
168 | /* All 4 notifers below get called with the target struct device * | |
169 | * as an argument. Note that those functions are likely to be called | |
170 | * with the device lock held in the core, so be careful. | |
171 | */ | |
172 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
173 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
174 | #define BUS_NOTIFY_BIND_DRIVER 0x00000003 /* driver about to be | |
175 | bound */ | |
176 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000004 /* driver bound to device */ | |
177 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000005 /* driver about to be | |
178 | unbound */ | |
179 | #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000006 /* driver is unbound | |
180 | from the device */ | |
181 | ||
182 | extern struct kset *bus_get_kset(struct bus_type *bus); | |
183 | extern struct klist *bus_get_device_klist(struct bus_type *bus); | |
184 | ||
185 | /** | |
186 | * struct device_driver - The basic device driver structure | |
187 | * @name: Name of the device driver. | |
188 | * @bus: The bus which the device of this driver belongs to. | |
189 | * @owner: The module owner. | |
190 | * @mod_name: Used for built-in modules. | |
191 | * @suppress_bind_attrs: Disables bind/unbind via sysfs. | |
192 | * @of_match_table: The open firmware table. | |
193 | * @probe: Called to query the existence of a specific device, | |
194 | * whether this driver can work with it, and bind the driver | |
195 | * to a specific device. | |
196 | * @remove: Called when the device is removed from the system to | |
197 | * unbind a device from this driver. | |
198 | * @shutdown: Called at shut-down time to quiesce the device. | |
199 | * @suspend: Called to put the device to sleep mode. Usually to a | |
200 | * low power state. | |
201 | * @resume: Called to bring a device from sleep mode. | |
202 | * @groups: Default attributes that get created by the driver core | |
203 | * automatically. | |
204 | * @pm: Power management operations of the device which matched | |
205 | * this driver. | |
206 | * @p: Driver core's private data, no one other than the driver | |
207 | * core can touch this. | |
208 | * | |
209 | * The device driver-model tracks all of the drivers known to the system. | |
210 | * The main reason for this tracking is to enable the driver core to match | |
211 | * up drivers with new devices. Once drivers are known objects within the | |
212 | * system, however, a number of other things become possible. Device drivers | |
213 | * can export information and configuration variables that are independent | |
214 | * of any specific device. | |
215 | */ | |
216 | struct device_driver { | |
217 | const char *name; | |
218 | struct bus_type *bus; | |
219 | ||
220 | struct module *owner; | |
221 | const char *mod_name; /* used for built-in modules */ | |
222 | ||
223 | bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ | |
224 | ||
225 | const struct of_device_id *of_match_table; | |
226 | ||
227 | int (*probe) (struct device *dev); | |
228 | int (*remove) (struct device *dev); | |
229 | void (*shutdown) (struct device *dev); | |
230 | int (*suspend) (struct device *dev, pm_message_t state); | |
231 | int (*resume) (struct device *dev); | |
232 | const struct attribute_group **groups; | |
233 | ||
234 | const struct dev_pm_ops *pm; | |
235 | ||
236 | struct driver_private *p; | |
237 | }; | |
238 | ||
239 | ||
240 | extern int __must_check driver_register(struct device_driver *drv); | |
241 | extern void driver_unregister(struct device_driver *drv); | |
242 | ||
243 | extern struct device_driver *driver_find(const char *name, | |
244 | struct bus_type *bus); | |
245 | extern int driver_probe_done(void); | |
246 | extern void wait_for_device_probe(void); | |
247 | ||
248 | ||
249 | /* sysfs interface for exporting driver attributes */ | |
250 | ||
251 | struct driver_attribute { | |
252 | struct attribute attr; | |
253 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
254 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
255 | size_t count); | |
256 | }; | |
257 | ||
258 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ | |
259 | struct driver_attribute driver_attr_##_name = \ | |
260 | __ATTR(_name, _mode, _show, _store) | |
261 | ||
262 | extern int __must_check driver_create_file(struct device_driver *driver, | |
263 | const struct driver_attribute *attr); | |
264 | extern void driver_remove_file(struct device_driver *driver, | |
265 | const struct driver_attribute *attr); | |
266 | ||
267 | extern int __must_check driver_for_each_device(struct device_driver *drv, | |
268 | struct device *start, | |
269 | void *data, | |
270 | int (*fn)(struct device *dev, | |
271 | void *)); | |
272 | struct device *driver_find_device(struct device_driver *drv, | |
273 | struct device *start, void *data, | |
274 | int (*match)(struct device *dev, void *data)); | |
275 | ||
276 | /** | |
277 | * struct subsys_interface - interfaces to device functions | |
278 | * @name: name of the device function | |
279 | * @subsys: subsytem of the devices to attach to | |
280 | * @node: the list of functions registered at the subsystem | |
281 | * @add_dev: device hookup to device function handler | |
282 | * @remove_dev: device hookup to device function handler | |
283 | * | |
284 | * Simple interfaces attached to a subsystem. Multiple interfaces can | |
285 | * attach to a subsystem and its devices. Unlike drivers, they do not | |
286 | * exclusively claim or control devices. Interfaces usually represent | |
287 | * a specific functionality of a subsystem/class of devices. | |
288 | */ | |
289 | struct subsys_interface { | |
290 | const char *name; | |
291 | struct bus_type *subsys; | |
292 | struct list_head node; | |
293 | int (*add_dev)(struct device *dev, struct subsys_interface *sif); | |
294 | int (*remove_dev)(struct device *dev, struct subsys_interface *sif); | |
295 | }; | |
296 | ||
297 | int subsys_interface_register(struct subsys_interface *sif); | |
298 | void subsys_interface_unregister(struct subsys_interface *sif); | |
299 | ||
300 | int subsys_system_register(struct bus_type *subsys, | |
301 | const struct attribute_group **groups); | |
302 | ||
303 | /** | |
304 | * struct class - device classes | |
305 | * @name: Name of the class. | |
306 | * @owner: The module owner. | |
307 | * @class_attrs: Default attributes of this class. | |
308 | * @dev_attrs: Default attributes of the devices belong to the class. | |
309 | * @dev_bin_attrs: Default binary attributes of the devices belong to the class. | |
310 | * @dev_kobj: The kobject that represents this class and links it into the hierarchy. | |
311 | * @dev_uevent: Called when a device is added, removed from this class, or a | |
312 | * few other things that generate uevents to add the environment | |
313 | * variables. | |
314 | * @devnode: Callback to provide the devtmpfs. | |
315 | * @class_release: Called to release this class. | |
316 | * @dev_release: Called to release the device. | |
317 | * @suspend: Used to put the device to sleep mode, usually to a low power | |
318 | * state. | |
319 | * @resume: Used to bring the device from the sleep mode. | |
320 | * @ns_type: Callbacks so sysfs can detemine namespaces. | |
321 | * @namespace: Namespace of the device belongs to this class. | |
322 | * @pm: The default device power management operations of this class. | |
323 | * @p: The private data of the driver core, no one other than the | |
324 | * driver core can touch this. | |
325 | * | |
326 | * A class is a higher-level view of a device that abstracts out low-level | |
327 | * implementation details. Drivers may see a SCSI disk or an ATA disk, but, | |
328 | * at the class level, they are all simply disks. Classes allow user space | |
329 | * to work with devices based on what they do, rather than how they are | |
330 | * connected or how they work. | |
331 | */ | |
332 | struct class { | |
333 | const char *name; | |
334 | struct module *owner; | |
335 | ||
336 | struct class_attribute *class_attrs; | |
337 | struct device_attribute *dev_attrs; | |
338 | struct bin_attribute *dev_bin_attrs; | |
339 | struct kobject *dev_kobj; | |
340 | ||
341 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); | |
342 | char *(*devnode)(struct device *dev, umode_t *mode); | |
343 | ||
344 | void (*class_release)(struct class *class); | |
345 | void (*dev_release)(struct device *dev); | |
346 | ||
347 | int (*suspend)(struct device *dev, pm_message_t state); | |
348 | int (*resume)(struct device *dev); | |
349 | ||
350 | const struct kobj_ns_type_operations *ns_type; | |
351 | const void *(*namespace)(struct device *dev); | |
352 | ||
353 | const struct dev_pm_ops *pm; | |
354 | ||
355 | struct subsys_private *p; | |
356 | }; | |
357 | ||
358 | struct class_dev_iter { | |
359 | struct klist_iter ki; | |
360 | const struct device_type *type; | |
361 | }; | |
362 | ||
363 | extern struct kobject *sysfs_dev_block_kobj; | |
364 | extern struct kobject *sysfs_dev_char_kobj; | |
365 | extern int __must_check __class_register(struct class *class, | |
366 | struct lock_class_key *key); | |
367 | extern void class_unregister(struct class *class); | |
368 | ||
369 | /* This is a #define to keep the compiler from merging different | |
370 | * instances of the __key variable */ | |
371 | #define class_register(class) \ | |
372 | ({ \ | |
373 | static struct lock_class_key __key; \ | |
374 | __class_register(class, &__key); \ | |
375 | }) | |
376 | ||
377 | struct class_compat; | |
378 | struct class_compat *class_compat_register(const char *name); | |
379 | void class_compat_unregister(struct class_compat *cls); | |
380 | int class_compat_create_link(struct class_compat *cls, struct device *dev, | |
381 | struct device *device_link); | |
382 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, | |
383 | struct device *device_link); | |
384 | ||
385 | extern void class_dev_iter_init(struct class_dev_iter *iter, | |
386 | struct class *class, | |
387 | struct device *start, | |
388 | const struct device_type *type); | |
389 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); | |
390 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
391 | ||
392 | extern int class_for_each_device(struct class *class, struct device *start, | |
393 | void *data, | |
394 | int (*fn)(struct device *dev, void *data)); | |
395 | extern struct device *class_find_device(struct class *class, | |
396 | struct device *start, void *data, | |
397 | int (*match)(struct device *, void *)); | |
398 | ||
399 | struct class_attribute { | |
400 | struct attribute attr; | |
401 | ssize_t (*show)(struct class *class, struct class_attribute *attr, | |
402 | char *buf); | |
403 | ssize_t (*store)(struct class *class, struct class_attribute *attr, | |
404 | const char *buf, size_t count); | |
405 | const void *(*namespace)(struct class *class, | |
406 | const struct class_attribute *attr); | |
407 | }; | |
408 | ||
409 | #define CLASS_ATTR(_name, _mode, _show, _store) \ | |
410 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
411 | ||
412 | extern int __must_check class_create_file(struct class *class, | |
413 | const struct class_attribute *attr); | |
414 | extern void class_remove_file(struct class *class, | |
415 | const struct class_attribute *attr); | |
416 | ||
417 | /* Simple class attribute that is just a static string */ | |
418 | ||
419 | struct class_attribute_string { | |
420 | struct class_attribute attr; | |
421 | char *str; | |
422 | }; | |
423 | ||
424 | /* Currently read-only only */ | |
425 | #define _CLASS_ATTR_STRING(_name, _mode, _str) \ | |
426 | { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } | |
427 | #define CLASS_ATTR_STRING(_name, _mode, _str) \ | |
428 | struct class_attribute_string class_attr_##_name = \ | |
429 | _CLASS_ATTR_STRING(_name, _mode, _str) | |
430 | ||
431 | extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, | |
432 | char *buf); | |
433 | ||
434 | struct class_interface { | |
435 | struct list_head node; | |
436 | struct class *class; | |
437 | ||
438 | int (*add_dev) (struct device *, struct class_interface *); | |
439 | void (*remove_dev) (struct device *, struct class_interface *); | |
440 | }; | |
441 | ||
442 | extern int __must_check class_interface_register(struct class_interface *); | |
443 | extern void class_interface_unregister(struct class_interface *); | |
444 | ||
445 | extern struct class * __must_check __class_create(struct module *owner, | |
446 | const char *name, | |
447 | struct lock_class_key *key); | |
448 | extern void class_destroy(struct class *cls); | |
449 | ||
450 | /* This is a #define to keep the compiler from merging different | |
451 | * instances of the __key variable */ | |
452 | #define class_create(owner, name) \ | |
453 | ({ \ | |
454 | static struct lock_class_key __key; \ | |
455 | __class_create(owner, name, &__key); \ | |
456 | }) | |
457 | ||
458 | /* | |
459 | * The type of device, "struct device" is embedded in. A class | |
460 | * or bus can contain devices of different types | |
461 | * like "partitions" and "disks", "mouse" and "event". | |
462 | * This identifies the device type and carries type-specific | |
463 | * information, equivalent to the kobj_type of a kobject. | |
464 | * If "name" is specified, the uevent will contain it in | |
465 | * the DEVTYPE variable. | |
466 | */ | |
467 | struct device_type { | |
468 | const char *name; | |
469 | const struct attribute_group **groups; | |
470 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
471 | char *(*devnode)(struct device *dev, umode_t *mode); | |
472 | void (*release)(struct device *dev); | |
473 | ||
474 | const struct dev_pm_ops *pm; | |
475 | }; | |
476 | ||
477 | /* interface for exporting device attributes */ | |
478 | struct device_attribute { | |
479 | struct attribute attr; | |
480 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
481 | char *buf); | |
482 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
483 | const char *buf, size_t count); | |
484 | }; | |
485 | ||
486 | struct dev_ext_attribute { | |
487 | struct device_attribute attr; | |
488 | void *var; | |
489 | }; | |
490 | ||
491 | ssize_t device_show_ulong(struct device *dev, struct device_attribute *attr, | |
492 | char *buf); | |
493 | ssize_t device_store_ulong(struct device *dev, struct device_attribute *attr, | |
494 | const char *buf, size_t count); | |
495 | ssize_t device_show_int(struct device *dev, struct device_attribute *attr, | |
496 | char *buf); | |
497 | ssize_t device_store_int(struct device *dev, struct device_attribute *attr, | |
498 | const char *buf, size_t count); | |
499 | ||
500 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ | |
501 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
502 | #define DEVICE_ULONG_ATTR(_name, _mode, _var) \ | |
503 | struct dev_ext_attribute dev_attr_##_name = \ | |
504 | { __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) } | |
505 | #define DEVICE_INT_ATTR(_name, _mode, _var) \ | |
506 | struct dev_ext_attribute dev_attr_##_name = \ | |
507 | { __ATTR(_name, _mode, device_show_int, device_store_int), &(_var) } | |
508 | #define DEVICE_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \ | |
509 | struct device_attribute dev_attr_##_name = \ | |
510 | __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) | |
511 | ||
512 | extern int device_create_file(struct device *device, | |
513 | const struct device_attribute *entry); | |
514 | extern void device_remove_file(struct device *dev, | |
515 | const struct device_attribute *attr); | |
516 | extern int __must_check device_create_bin_file(struct device *dev, | |
517 | const struct bin_attribute *attr); | |
518 | extern void device_remove_bin_file(struct device *dev, | |
519 | const struct bin_attribute *attr); | |
520 | extern int device_schedule_callback_owner(struct device *dev, | |
521 | void (*func)(struct device *dev), struct module *owner); | |
522 | ||
523 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
524 | #define device_schedule_callback(dev, func) \ | |
525 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
526 | ||
527 | /* device resource management */ | |
528 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
529 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
530 | ||
531 | #ifdef CONFIG_DEBUG_DEVRES | |
532 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, | |
533 | const char *name); | |
534 | #define devres_alloc(release, size, gfp) \ | |
535 | __devres_alloc(release, size, gfp, #release) | |
536 | #else | |
537 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); | |
538 | #endif | |
539 | extern void devres_for_each_res(struct device *dev, dr_release_t release, | |
540 | dr_match_t match, void *match_data, | |
541 | void (*fn)(struct device *, void *, void *), | |
542 | void *data); | |
543 | extern void devres_free(void *res); | |
544 | extern void devres_add(struct device *dev, void *res); | |
545 | extern void *devres_find(struct device *dev, dr_release_t release, | |
546 | dr_match_t match, void *match_data); | |
547 | extern void *devres_get(struct device *dev, void *new_res, | |
548 | dr_match_t match, void *match_data); | |
549 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
550 | dr_match_t match, void *match_data); | |
551 | extern int devres_destroy(struct device *dev, dr_release_t release, | |
552 | dr_match_t match, void *match_data); | |
553 | extern int devres_release(struct device *dev, dr_release_t release, | |
554 | dr_match_t match, void *match_data); | |
555 | ||
556 | /* devres group */ | |
557 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
558 | gfp_t gfp); | |
559 | extern void devres_close_group(struct device *dev, void *id); | |
560 | extern void devres_remove_group(struct device *dev, void *id); | |
561 | extern int devres_release_group(struct device *dev, void *id); | |
562 | ||
563 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
564 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
565 | extern void devm_kfree(struct device *dev, void *p); | |
566 | ||
567 | void __iomem *devm_request_and_ioremap(struct device *dev, | |
568 | struct resource *res); | |
569 | ||
570 | struct device_dma_parameters { | |
571 | /* | |
572 | * a low level driver may set these to teach IOMMU code about | |
573 | * sg limitations. | |
574 | */ | |
575 | unsigned int max_segment_size; | |
576 | unsigned long segment_boundary_mask; | |
577 | }; | |
578 | ||
579 | /** | |
580 | * struct device - The basic device structure | |
581 | * @parent: The device's "parent" device, the device to which it is attached. | |
582 | * In most cases, a parent device is some sort of bus or host | |
583 | * controller. If parent is NULL, the device, is a top-level device, | |
584 | * which is not usually what you want. | |
585 | * @p: Holds the private data of the driver core portions of the device. | |
586 | * See the comment of the struct device_private for detail. | |
587 | * @kobj: A top-level, abstract class from which other classes are derived. | |
588 | * @init_name: Initial name of the device. | |
589 | * @type: The type of device. | |
590 | * This identifies the device type and carries type-specific | |
591 | * information. | |
592 | * @mutex: Mutex to synchronize calls to its driver. | |
593 | * @bus: Type of bus device is on. | |
594 | * @driver: Which driver has allocated this | |
595 | * @platform_data: Platform data specific to the device. | |
596 | * Example: For devices on custom boards, as typical of embedded | |
597 | * and SOC based hardware, Linux often uses platform_data to point | |
598 | * to board-specific structures describing devices and how they | |
599 | * are wired. That can include what ports are available, chip | |
600 | * variants, which GPIO pins act in what additional roles, and so | |
601 | * on. This shrinks the "Board Support Packages" (BSPs) and | |
602 | * minimizes board-specific #ifdefs in drivers. | |
603 | * @power: For device power management. | |
604 | * See Documentation/power/devices.txt for details. | |
605 | * @pm_domain: Provide callbacks that are executed during system suspend, | |
606 | * hibernation, system resume and during runtime PM transitions | |
607 | * along with subsystem-level and driver-level callbacks. | |
608 | * @numa_node: NUMA node this device is close to. | |
609 | * @dma_mask: Dma mask (if dma'ble device). | |
610 | * @coherent_dma_mask: Like dma_mask, but for alloc_coherent mapping as not all | |
611 | * hardware supports 64-bit addresses for consistent allocations | |
612 | * such descriptors. | |
613 | * @dma_parms: A low level driver may set these to teach IOMMU code about | |
614 | * segment limitations. | |
615 | * @dma_pools: Dma pools (if dma'ble device). | |
616 | * @dma_mem: Internal for coherent mem override. | |
617 | * @archdata: For arch-specific additions. | |
618 | * @of_node: Associated device tree node. | |
619 | * @devt: For creating the sysfs "dev". | |
620 | * @id: device instance | |
621 | * @devres_lock: Spinlock to protect the resource of the device. | |
622 | * @devres_head: The resources list of the device. | |
623 | * @knode_class: The node used to add the device to the class list. | |
624 | * @class: The class of the device. | |
625 | * @groups: Optional attribute groups. | |
626 | * @release: Callback to free the device after all references have | |
627 | * gone away. This should be set by the allocator of the | |
628 | * device (i.e. the bus driver that discovered the device). | |
629 | * | |
630 | * At the lowest level, every device in a Linux system is represented by an | |
631 | * instance of struct device. The device structure contains the information | |
632 | * that the device model core needs to model the system. Most subsystems, | |
633 | * however, track additional information about the devices they host. As a | |
634 | * result, it is rare for devices to be represented by bare device structures; | |
635 | * instead, that structure, like kobject structures, is usually embedded within | |
636 | * a higher-level representation of the device. | |
637 | */ | |
638 | struct device { | |
639 | struct device *parent; | |
640 | ||
641 | struct device_private *p; | |
642 | ||
643 | struct kobject kobj; | |
644 | const char *init_name; /* initial name of the device */ | |
645 | const struct device_type *type; | |
646 | ||
647 | struct mutex mutex; /* mutex to synchronize calls to | |
648 | * its driver. | |
649 | */ | |
650 | ||
651 | struct bus_type *bus; /* type of bus device is on */ | |
652 | struct device_driver *driver; /* which driver has allocated this | |
653 | device */ | |
654 | void *platform_data; /* Platform specific data, device | |
655 | core doesn't touch it */ | |
656 | struct dev_pm_info power; | |
657 | struct dev_pm_domain *pm_domain; | |
658 | ||
659 | #ifdef CONFIG_NUMA | |
660 | int numa_node; /* NUMA node this device is close to */ | |
661 | #endif | |
662 | u64 *dma_mask; /* dma mask (if dma'able device) */ | |
663 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
664 | alloc_coherent mappings as | |
665 | not all hardware supports | |
666 | 64 bit addresses for consistent | |
667 | allocations such descriptors. */ | |
668 | ||
669 | struct device_dma_parameters *dma_parms; | |
670 | ||
671 | struct list_head dma_pools; /* dma pools (if dma'ble) */ | |
672 | ||
673 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
674 | override */ | |
675 | #ifdef CONFIG_CMA | |
676 | struct cma *cma_area; /* contiguous memory area for dma | |
677 | allocations */ | |
678 | #endif | |
679 | /* arch specific additions */ | |
680 | struct dev_archdata archdata; | |
681 | ||
682 | struct device_node *of_node; /* associated device tree node */ | |
683 | ||
684 | dev_t devt; /* dev_t, creates the sysfs "dev" */ | |
685 | u32 id; /* device instance */ | |
686 | ||
687 | spinlock_t devres_lock; | |
688 | struct list_head devres_head; | |
689 | ||
690 | struct klist_node knode_class; | |
691 | struct class *class; | |
692 | const struct attribute_group **groups; /* optional groups */ | |
693 | ||
694 | void (*release)(struct device *dev); | |
695 | struct iommu_group *iommu_group; | |
696 | }; | |
697 | ||
698 | static inline struct device *kobj_to_dev(struct kobject *kobj) | |
699 | { | |
700 | return container_of(kobj, struct device, kobj); | |
701 | } | |
702 | ||
703 | /* Get the wakeup routines, which depend on struct device */ | |
704 | #include <linux/pm_wakeup.h> | |
705 | ||
706 | static inline const char *dev_name(const struct device *dev) | |
707 | { | |
708 | /* Use the init name until the kobject becomes available */ | |
709 | if (dev->init_name) | |
710 | return dev->init_name; | |
711 | ||
712 | return kobject_name(&dev->kobj); | |
713 | } | |
714 | ||
715 | extern __printf(2, 3) | |
716 | int dev_set_name(struct device *dev, const char *name, ...); | |
717 | ||
718 | #ifdef CONFIG_NUMA | |
719 | static inline int dev_to_node(struct device *dev) | |
720 | { | |
721 | return dev->numa_node; | |
722 | } | |
723 | static inline void set_dev_node(struct device *dev, int node) | |
724 | { | |
725 | dev->numa_node = node; | |
726 | } | |
727 | #else | |
728 | static inline int dev_to_node(struct device *dev) | |
729 | { | |
730 | return -1; | |
731 | } | |
732 | static inline void set_dev_node(struct device *dev, int node) | |
733 | { | |
734 | } | |
735 | #endif | |
736 | ||
737 | static inline struct pm_subsys_data *dev_to_psd(struct device *dev) | |
738 | { | |
739 | return dev ? dev->power.subsys_data : NULL; | |
740 | } | |
741 | ||
742 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) | |
743 | { | |
744 | return dev->kobj.uevent_suppress; | |
745 | } | |
746 | ||
747 | static inline void dev_set_uevent_suppress(struct device *dev, int val) | |
748 | { | |
749 | dev->kobj.uevent_suppress = val; | |
750 | } | |
751 | ||
752 | static inline int device_is_registered(struct device *dev) | |
753 | { | |
754 | return dev->kobj.state_in_sysfs; | |
755 | } | |
756 | ||
757 | static inline void device_enable_async_suspend(struct device *dev) | |
758 | { | |
759 | if (!dev->power.is_prepared) | |
760 | dev->power.async_suspend = true; | |
761 | } | |
762 | ||
763 | static inline void device_disable_async_suspend(struct device *dev) | |
764 | { | |
765 | if (!dev->power.is_prepared) | |
766 | dev->power.async_suspend = false; | |
767 | } | |
768 | ||
769 | static inline bool device_async_suspend_enabled(struct device *dev) | |
770 | { | |
771 | return !!dev->power.async_suspend; | |
772 | } | |
773 | ||
774 | static inline void pm_suspend_ignore_children(struct device *dev, bool enable) | |
775 | { | |
776 | dev->power.ignore_children = enable; | |
777 | } | |
778 | ||
779 | static inline void dev_pm_syscore_device(struct device *dev, bool val) | |
780 | { | |
781 | #ifdef CONFIG_PM_SLEEP | |
782 | dev->power.syscore = val; | |
783 | #endif | |
784 | } | |
785 | ||
786 | static inline void device_lock(struct device *dev) | |
787 | { | |
788 | mutex_lock(&dev->mutex); | |
789 | } | |
790 | ||
791 | static inline int device_trylock(struct device *dev) | |
792 | { | |
793 | return mutex_trylock(&dev->mutex); | |
794 | } | |
795 | ||
796 | static inline void device_unlock(struct device *dev) | |
797 | { | |
798 | mutex_unlock(&dev->mutex); | |
799 | } | |
800 | ||
801 | void driver_init(void); | |
802 | ||
803 | /* | |
804 | * High level routines for use by the bus drivers | |
805 | */ | |
806 | extern int __must_check device_register(struct device *dev); | |
807 | extern void device_unregister(struct device *dev); | |
808 | extern void device_initialize(struct device *dev); | |
809 | extern int __must_check device_add(struct device *dev); | |
810 | extern void device_del(struct device *dev); | |
811 | extern int device_for_each_child(struct device *dev, void *data, | |
812 | int (*fn)(struct device *dev, void *data)); | |
813 | extern struct device *device_find_child(struct device *dev, void *data, | |
814 | int (*match)(struct device *dev, void *data)); | |
815 | extern int device_rename(struct device *dev, const char *new_name); | |
816 | extern int device_move(struct device *dev, struct device *new_parent, | |
817 | enum dpm_order dpm_order); | |
818 | extern const char *device_get_devnode(struct device *dev, | |
819 | umode_t *mode, const char **tmp); | |
820 | extern void *dev_get_drvdata(const struct device *dev); | |
821 | extern int dev_set_drvdata(struct device *dev, void *data); | |
822 | ||
823 | /* | |
824 | * Root device objects for grouping under /sys/devices | |
825 | */ | |
826 | extern struct device *__root_device_register(const char *name, | |
827 | struct module *owner); | |
828 | ||
829 | /* | |
830 | * This is a macro to avoid include problems with THIS_MODULE, | |
831 | * just as per what is done for device_schedule_callback() above. | |
832 | */ | |
833 | #define root_device_register(name) \ | |
834 | __root_device_register(name, THIS_MODULE) | |
835 | ||
836 | extern void root_device_unregister(struct device *root); | |
837 | ||
838 | static inline void *dev_get_platdata(const struct device *dev) | |
839 | { | |
840 | return dev->platform_data; | |
841 | } | |
842 | ||
843 | /* | |
844 | * Manual binding of a device to driver. See drivers/base/bus.c | |
845 | * for information on use. | |
846 | */ | |
847 | extern int __must_check device_bind_driver(struct device *dev); | |
848 | extern void device_release_driver(struct device *dev); | |
849 | extern int __must_check device_attach(struct device *dev); | |
850 | extern int __must_check driver_attach(struct device_driver *drv); | |
851 | extern int __must_check device_reprobe(struct device *dev); | |
852 | ||
853 | /* | |
854 | * Easy functions for dynamically creating devices on the fly | |
855 | */ | |
856 | extern struct device *device_create_vargs(struct class *cls, | |
857 | struct device *parent, | |
858 | dev_t devt, | |
859 | void *drvdata, | |
860 | const char *fmt, | |
861 | va_list vargs); | |
862 | extern __printf(5, 6) | |
863 | struct device *device_create(struct class *cls, struct device *parent, | |
864 | dev_t devt, void *drvdata, | |
865 | const char *fmt, ...); | |
866 | extern void device_destroy(struct class *cls, dev_t devt); | |
867 | ||
868 | /* | |
869 | * Platform "fixup" functions - allow the platform to have their say | |
870 | * about devices and actions that the general device layer doesn't | |
871 | * know about. | |
872 | */ | |
873 | /* Notify platform of device discovery */ | |
874 | extern int (*platform_notify)(struct device *dev); | |
875 | ||
876 | extern int (*platform_notify_remove)(struct device *dev); | |
877 | ||
878 | ||
879 | /* | |
880 | * get_device - atomically increment the reference count for the device. | |
881 | * | |
882 | */ | |
883 | extern struct device *get_device(struct device *dev); | |
884 | extern void put_device(struct device *dev); | |
885 | ||
886 | #ifdef CONFIG_DEVTMPFS | |
887 | extern int devtmpfs_create_node(struct device *dev); | |
888 | extern int devtmpfs_delete_node(struct device *dev); | |
889 | extern int devtmpfs_mount(const char *mntdir); | |
890 | #else | |
891 | static inline int devtmpfs_create_node(struct device *dev) { return 0; } | |
892 | static inline int devtmpfs_delete_node(struct device *dev) { return 0; } | |
893 | static inline int devtmpfs_mount(const char *mountpoint) { return 0; } | |
894 | #endif | |
895 | ||
896 | /* drivers/base/power/shutdown.c */ | |
897 | extern void device_shutdown(void); | |
898 | ||
899 | /* debugging and troubleshooting/diagnostic helpers. */ | |
900 | extern const char *dev_driver_string(const struct device *dev); | |
901 | ||
902 | ||
903 | #ifdef CONFIG_PRINTK | |
904 | ||
905 | extern __printf(3, 0) | |
906 | int dev_vprintk_emit(int level, const struct device *dev, | |
907 | const char *fmt, va_list args); | |
908 | extern __printf(3, 4) | |
909 | int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...); | |
910 | ||
911 | extern __printf(3, 4) | |
912 | int dev_printk(const char *level, const struct device *dev, | |
913 | const char *fmt, ...); | |
914 | extern __printf(2, 3) | |
915 | int dev_emerg(const struct device *dev, const char *fmt, ...); | |
916 | extern __printf(2, 3) | |
917 | int dev_alert(const struct device *dev, const char *fmt, ...); | |
918 | extern __printf(2, 3) | |
919 | int dev_crit(const struct device *dev, const char *fmt, ...); | |
920 | extern __printf(2, 3) | |
921 | int dev_err(const struct device *dev, const char *fmt, ...); | |
922 | extern __printf(2, 3) | |
923 | int dev_warn(const struct device *dev, const char *fmt, ...); | |
924 | extern __printf(2, 3) | |
925 | int dev_notice(const struct device *dev, const char *fmt, ...); | |
926 | extern __printf(2, 3) | |
927 | int _dev_info(const struct device *dev, const char *fmt, ...); | |
928 | ||
929 | #else | |
930 | ||
931 | static inline __printf(3, 0) | |
932 | int dev_vprintk_emit(int level, const struct device *dev, | |
933 | const char *fmt, va_list args) | |
934 | { return 0; } | |
935 | static inline __printf(3, 4) | |
936 | int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...) | |
937 | { return 0; } | |
938 | ||
939 | static inline int __dev_printk(const char *level, const struct device *dev, | |
940 | struct va_format *vaf) | |
941 | { return 0; } | |
942 | static inline __printf(3, 4) | |
943 | int dev_printk(const char *level, const struct device *dev, | |
944 | const char *fmt, ...) | |
945 | { return 0; } | |
946 | ||
947 | static inline __printf(2, 3) | |
948 | int dev_emerg(const struct device *dev, const char *fmt, ...) | |
949 | { return 0; } | |
950 | static inline __printf(2, 3) | |
951 | int dev_crit(const struct device *dev, const char *fmt, ...) | |
952 | { return 0; } | |
953 | static inline __printf(2, 3) | |
954 | int dev_alert(const struct device *dev, const char *fmt, ...) | |
955 | { return 0; } | |
956 | static inline __printf(2, 3) | |
957 | int dev_err(const struct device *dev, const char *fmt, ...) | |
958 | { return 0; } | |
959 | static inline __printf(2, 3) | |
960 | int dev_warn(const struct device *dev, const char *fmt, ...) | |
961 | { return 0; } | |
962 | static inline __printf(2, 3) | |
963 | int dev_notice(const struct device *dev, const char *fmt, ...) | |
964 | { return 0; } | |
965 | static inline __printf(2, 3) | |
966 | int _dev_info(const struct device *dev, const char *fmt, ...) | |
967 | { return 0; } | |
968 | ||
969 | #endif | |
970 | ||
971 | /* | |
972 | * Stupid hackaround for existing uses of non-printk uses dev_info | |
973 | * | |
974 | * Note that the definition of dev_info below is actually _dev_info | |
975 | * and a macro is used to avoid redefining dev_info | |
976 | */ | |
977 | ||
978 | #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg) | |
979 | ||
980 | #if defined(CONFIG_DYNAMIC_DEBUG) | |
981 | #define dev_dbg(dev, format, ...) \ | |
982 | do { \ | |
983 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ | |
984 | } while (0) | |
985 | #elif defined(DEBUG) | |
986 | #define dev_dbg(dev, format, arg...) \ | |
987 | dev_printk(KERN_DEBUG, dev, format, ##arg) | |
988 | #else | |
989 | #define dev_dbg(dev, format, arg...) \ | |
990 | ({ \ | |
991 | if (0) \ | |
992 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
993 | 0; \ | |
994 | }) | |
995 | #endif | |
996 | ||
997 | #define dev_level_ratelimited(dev_level, dev, fmt, ...) \ | |
998 | do { \ | |
999 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
1000 | DEFAULT_RATELIMIT_INTERVAL, \ | |
1001 | DEFAULT_RATELIMIT_BURST); \ | |
1002 | if (__ratelimit(&_rs)) \ | |
1003 | dev_level(dev, fmt, ##__VA_ARGS__); \ | |
1004 | } while (0) | |
1005 | ||
1006 | #define dev_emerg_ratelimited(dev, fmt, ...) \ | |
1007 | dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__) | |
1008 | #define dev_alert_ratelimited(dev, fmt, ...) \ | |
1009 | dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__) | |
1010 | #define dev_crit_ratelimited(dev, fmt, ...) \ | |
1011 | dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__) | |
1012 | #define dev_err_ratelimited(dev, fmt, ...) \ | |
1013 | dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__) | |
1014 | #define dev_warn_ratelimited(dev, fmt, ...) \ | |
1015 | dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__) | |
1016 | #define dev_notice_ratelimited(dev, fmt, ...) \ | |
1017 | dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__) | |
1018 | #define dev_info_ratelimited(dev, fmt, ...) \ | |
1019 | dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__) | |
1020 | #if defined(CONFIG_DYNAMIC_DEBUG) || defined(DEBUG) | |
1021 | #define dev_dbg_ratelimited(dev, fmt, ...) \ | |
1022 | do { \ | |
1023 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
1024 | DEFAULT_RATELIMIT_INTERVAL, \ | |
1025 | DEFAULT_RATELIMIT_BURST); \ | |
1026 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
1027 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \ | |
1028 | __ratelimit(&_rs)) \ | |
1029 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ | |
1030 | ##__VA_ARGS__); \ | |
1031 | } while (0) | |
1032 | #else | |
1033 | #define dev_dbg_ratelimited(dev, fmt, ...) \ | |
1034 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | |
1035 | #endif | |
1036 | ||
1037 | #ifdef VERBOSE_DEBUG | |
1038 | #define dev_vdbg dev_dbg | |
1039 | #else | |
1040 | #define dev_vdbg(dev, format, arg...) \ | |
1041 | ({ \ | |
1042 | if (0) \ | |
1043 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
1044 | 0; \ | |
1045 | }) | |
1046 | #endif | |
1047 | ||
1048 | /* | |
1049 | * dev_WARN*() acts like dev_printk(), but with the key difference | |
1050 | * of using a WARN/WARN_ON to get the message out, including the | |
1051 | * file/line information and a backtrace. | |
1052 | */ | |
1053 | #define dev_WARN(dev, format, arg...) \ | |
1054 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
1055 | ||
1056 | #define dev_WARN_ONCE(dev, condition, format, arg...) \ | |
1057 | WARN_ONCE(condition, "Device %s\n" format, \ | |
1058 | dev_driver_string(dev), ## arg) | |
1059 | ||
1060 | /* Create alias, so I can be autoloaded. */ | |
1061 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
1062 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
1063 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
1064 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
1065 | ||
1066 | #ifdef CONFIG_SYSFS_DEPRECATED | |
1067 | extern long sysfs_deprecated; | |
1068 | #else | |
1069 | #define sysfs_deprecated 0 | |
1070 | #endif | |
1071 | ||
1072 | /** | |
1073 | * module_driver() - Helper macro for drivers that don't do anything | |
1074 | * special in module init/exit. This eliminates a lot of boilerplate. | |
1075 | * Each module may only use this macro once, and calling it replaces | |
1076 | * module_init() and module_exit(). | |
1077 | * | |
1078 | * @__driver: driver name | |
1079 | * @__register: register function for this driver type | |
1080 | * @__unregister: unregister function for this driver type | |
1081 | * @...: Additional arguments to be passed to __register and __unregister. | |
1082 | * | |
1083 | * Use this macro to construct bus specific macros for registering | |
1084 | * drivers, and do not use it on its own. | |
1085 | */ | |
1086 | #define module_driver(__driver, __register, __unregister, ...) \ | |
1087 | static int __init __driver##_init(void) \ | |
1088 | { \ | |
1089 | return __register(&(__driver) , ##__VA_ARGS__); \ | |
1090 | } \ | |
1091 | module_init(__driver##_init); \ | |
1092 | static void __exit __driver##_exit(void) \ | |
1093 | { \ | |
1094 | __unregister(&(__driver) , ##__VA_ARGS__); \ | |
1095 | } \ | |
1096 | module_exit(__driver##_exit); | |
1097 | ||
1098 | #endif /* _DEVICE_H_ */ |