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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> | |
5 | * | |
6 | * This file is released under the GPLv2 | |
7 | * | |
8 | * See Documentation/driver-model/ for more information. | |
9 | */ | |
10 | ||
11 | #ifndef _DEVICE_H_ | |
12 | #define _DEVICE_H_ | |
13 | ||
1da177e4 LT |
14 | #include <linux/ioport.h> |
15 | #include <linux/kobject.h> | |
465c7a3a | 16 | #include <linux/klist.h> |
1da177e4 | 17 | #include <linux/list.h> |
4a7fb636 | 18 | #include <linux/compiler.h> |
1da177e4 LT |
19 | #include <linux/types.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/pm.h> | |
22 | #include <asm/semaphore.h> | |
23 | #include <asm/atomic.h> | |
c6dbaef2 | 24 | #include <asm/device.h> |
1da177e4 LT |
25 | |
26 | #define DEVICE_NAME_SIZE 50 | |
27 | #define DEVICE_NAME_HALF __stringify(20) /* Less than half to accommodate slop */ | |
28 | #define DEVICE_ID_SIZE 32 | |
29 | #define BUS_ID_SIZE KOBJ_NAME_LEN | |
30 | ||
31 | ||
1da177e4 LT |
32 | struct device; |
33 | struct device_driver; | |
34 | struct class; | |
35 | struct class_device; | |
1da177e4 LT |
36 | |
37 | struct bus_type { | |
8d790d74 | 38 | const char * name; |
1da177e4 LT |
39 | |
40 | struct subsystem subsys; | |
41 | struct kset drivers; | |
42 | struct kset devices; | |
465c7a3a | 43 | struct klist klist_devices; |
38fdac3c | 44 | struct klist klist_drivers; |
1da177e4 | 45 | |
116af378 BH |
46 | struct blocking_notifier_head bus_notifier; |
47 | ||
1da177e4 LT |
48 | struct bus_attribute * bus_attrs; |
49 | struct device_attribute * dev_attrs; | |
50 | struct driver_attribute * drv_attrs; | |
51 | ||
52 | int (*match)(struct device * dev, struct device_driver * drv); | |
312c004d KS |
53 | int (*uevent)(struct device *dev, char **envp, |
54 | int num_envp, char *buffer, int buffer_size); | |
594c8281 RK |
55 | int (*probe)(struct device * dev); |
56 | int (*remove)(struct device * dev); | |
57 | void (*shutdown)(struct device * dev); | |
7c8265f5 | 58 | |
7c8265f5 LT |
59 | int (*suspend)(struct device * dev, pm_message_t state); |
60 | int (*suspend_late)(struct device * dev, pm_message_t state); | |
61 | int (*resume_early)(struct device * dev); | |
62 | int (*resume)(struct device * dev); | |
1da177e4 LT |
63 | }; |
64 | ||
4a7fb636 | 65 | extern int __must_check bus_register(struct bus_type * bus); |
1da177e4 LT |
66 | extern void bus_unregister(struct bus_type * bus); |
67 | ||
f86db396 | 68 | extern int __must_check bus_rescan_devices(struct bus_type * bus); |
1da177e4 | 69 | |
1da177e4 LT |
70 | /* iterator helpers for buses */ |
71 | ||
72 | int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data, | |
73 | int (*fn)(struct device *, void *)); | |
0edb5860 CH |
74 | struct device * bus_find_device(struct bus_type *bus, struct device *start, |
75 | void *data, int (*match)(struct device *, void *)); | |
1da177e4 | 76 | |
4a7fb636 AM |
77 | int __must_check bus_for_each_drv(struct bus_type *bus, |
78 | struct device_driver *start, void *data, | |
79 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 80 | |
116af378 BH |
81 | /* |
82 | * Bus notifiers: Get notified of addition/removal of devices | |
83 | * and binding/unbinding of drivers to devices. | |
84 | * In the long run, it should be a replacement for the platform | |
85 | * notify hooks. | |
86 | */ | |
87 | struct notifier_block; | |
88 | ||
89 | extern int bus_register_notifier(struct bus_type *bus, | |
90 | struct notifier_block *nb); | |
91 | extern int bus_unregister_notifier(struct bus_type *bus, | |
92 | struct notifier_block *nb); | |
93 | ||
94 | /* All 4 notifers below get called with the target struct device * | |
95 | * as an argument. Note that those functions are likely to be called | |
96 | * with the device semaphore held in the core, so be careful. | |
97 | */ | |
98 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
99 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
100 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
101 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
102 | unbound */ | |
103 | ||
1da177e4 LT |
104 | /* driverfs interface for exporting bus attributes */ |
105 | ||
106 | struct bus_attribute { | |
107 | struct attribute attr; | |
108 | ssize_t (*show)(struct bus_type *, char * buf); | |
109 | ssize_t (*store)(struct bus_type *, const char * buf, size_t count); | |
110 | }; | |
111 | ||
112 | #define BUS_ATTR(_name,_mode,_show,_store) \ | |
113 | struct bus_attribute bus_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
114 | ||
4a7fb636 AM |
115 | extern int __must_check bus_create_file(struct bus_type *, |
116 | struct bus_attribute *); | |
1da177e4 LT |
117 | extern void bus_remove_file(struct bus_type *, struct bus_attribute *); |
118 | ||
119 | struct device_driver { | |
8d790d74 | 120 | const char * name; |
1da177e4 LT |
121 | struct bus_type * bus; |
122 | ||
123 | struct completion unloaded; | |
124 | struct kobject kobj; | |
94e7b1c5 | 125 | struct klist klist_devices; |
38fdac3c | 126 | struct klist_node knode_bus; |
1da177e4 | 127 | |
8d790d74 | 128 | struct module * owner; |
f30c53a8 | 129 | const char * mod_name; /* used for built-in modules */ |
1da177e4 LT |
130 | |
131 | int (*probe) (struct device * dev); | |
8d790d74 | 132 | int (*remove) (struct device * dev); |
1da177e4 | 133 | void (*shutdown) (struct device * dev); |
9480e307 RK |
134 | int (*suspend) (struct device * dev, pm_message_t state); |
135 | int (*resume) (struct device * dev); | |
d779249e GKH |
136 | |
137 | unsigned int multithread_probe:1; | |
1da177e4 LT |
138 | }; |
139 | ||
140 | ||
4a7fb636 | 141 | extern int __must_check driver_register(struct device_driver * drv); |
1da177e4 LT |
142 | extern void driver_unregister(struct device_driver * drv); |
143 | ||
144 | extern struct device_driver * get_driver(struct device_driver * drv); | |
145 | extern void put_driver(struct device_driver * drv); | |
146 | extern struct device_driver *driver_find(const char *name, struct bus_type *bus); | |
d779249e | 147 | extern int driver_probe_done(void); |
1da177e4 | 148 | |
1da177e4 LT |
149 | /* driverfs interface for exporting driver attributes */ |
150 | ||
151 | struct driver_attribute { | |
152 | struct attribute attr; | |
153 | ssize_t (*show)(struct device_driver *, char * buf); | |
154 | ssize_t (*store)(struct device_driver *, const char * buf, size_t count); | |
155 | }; | |
156 | ||
157 | #define DRIVER_ATTR(_name,_mode,_show,_store) \ | |
158 | struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
159 | ||
4a7fb636 AM |
160 | extern int __must_check driver_create_file(struct device_driver *, |
161 | struct driver_attribute *); | |
1da177e4 LT |
162 | extern void driver_remove_file(struct device_driver *, struct driver_attribute *); |
163 | ||
4a7fb636 AM |
164 | extern int __must_check driver_for_each_device(struct device_driver * drv, |
165 | struct device *start, void *data, | |
166 | int (*fn)(struct device *, void *)); | |
0edb5860 CH |
167 | struct device * driver_find_device(struct device_driver *drv, |
168 | struct device *start, void *data, | |
169 | int (*match)(struct device *, void *)); | |
fae3cd00 | 170 | |
1da177e4 LT |
171 | /* |
172 | * device classes | |
173 | */ | |
174 | struct class { | |
8d790d74 | 175 | const char * name; |
e9ba6365 | 176 | struct module * owner; |
1da177e4 LT |
177 | |
178 | struct subsystem subsys; | |
179 | struct list_head children; | |
23681e47 | 180 | struct list_head devices; |
1da177e4 LT |
181 | struct list_head interfaces; |
182 | struct semaphore sem; /* locks both the children and interfaces lists */ | |
183 | ||
c205ef48 GKH |
184 | struct kobject *virtual_dir; |
185 | ||
1da177e4 LT |
186 | struct class_attribute * class_attrs; |
187 | struct class_device_attribute * class_dev_attrs; | |
2620efef | 188 | struct device_attribute * dev_attrs; |
1da177e4 | 189 | |
312c004d | 190 | int (*uevent)(struct class_device *dev, char **envp, |
1da177e4 | 191 | int num_envp, char *buffer, int buffer_size); |
2620efef GKH |
192 | int (*dev_uevent)(struct device *dev, char **envp, int num_envp, |
193 | char *buffer, int buffer_size); | |
1da177e4 LT |
194 | |
195 | void (*release)(struct class_device *dev); | |
196 | void (*class_release)(struct class *class); | |
2620efef | 197 | void (*dev_release)(struct device *dev); |
7c8265f5 LT |
198 | |
199 | int (*suspend)(struct device *, pm_message_t state); | |
200 | int (*resume)(struct device *); | |
1da177e4 LT |
201 | }; |
202 | ||
4a7fb636 | 203 | extern int __must_check class_register(struct class *); |
1da177e4 LT |
204 | extern void class_unregister(struct class *); |
205 | ||
1da177e4 LT |
206 | |
207 | struct class_attribute { | |
208 | struct attribute attr; | |
209 | ssize_t (*show)(struct class *, char * buf); | |
210 | ssize_t (*store)(struct class *, const char * buf, size_t count); | |
211 | }; | |
212 | ||
213 | #define CLASS_ATTR(_name,_mode,_show,_store) \ | |
214 | struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
215 | ||
4a7fb636 AM |
216 | extern int __must_check class_create_file(struct class *, |
217 | const struct class_attribute *); | |
1da177e4 LT |
218 | extern void class_remove_file(struct class *, const struct class_attribute *); |
219 | ||
a7fd6706 KS |
220 | struct class_device_attribute { |
221 | struct attribute attr; | |
222 | ssize_t (*show)(struct class_device *, char * buf); | |
223 | ssize_t (*store)(struct class_device *, const char * buf, size_t count); | |
224 | }; | |
225 | ||
226 | #define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \ | |
227 | struct class_device_attribute class_device_attr_##_name = \ | |
228 | __ATTR(_name,_mode,_show,_store) | |
229 | ||
4a7fb636 | 230 | extern int __must_check class_device_create_file(struct class_device *, |
a7fd6706 | 231 | const struct class_device_attribute *); |
1da177e4 | 232 | |
74be227f GKH |
233 | /** |
234 | * struct class_device - class devices | |
235 | * @class: pointer to the parent class for this class device. This is required. | |
236 | * @devt: for internal use by the driver core only. | |
237 | * @node: for internal use by the driver core only. | |
238 | * @kobj: for internal use by the driver core only. | |
239 | * @devt_attr: for internal use by the driver core only. | |
1498221d | 240 | * @groups: optional additional groups to be created |
74be227f GKH |
241 | * @dev: if set, a symlink to the struct device is created in the sysfs |
242 | * directory for this struct class device. | |
243 | * @class_data: pointer to whatever you want to store here for this struct | |
244 | * class_device. Use class_get_devdata() and class_set_devdata() to get and | |
245 | * set this pointer. | |
246 | * @parent: pointer to a struct class_device that is the parent of this struct | |
247 | * class_device. If NULL, this class_device will show up at the root of the | |
248 | * struct class in sysfs (which is probably what you want to have happen.) | |
249 | * @release: pointer to a release function for this struct class_device. If | |
250 | * set, this will be called instead of the class specific release function. | |
251 | * Only use this if you want to override the default release function, like | |
252 | * when you are nesting class_device structures. | |
312c004d KS |
253 | * @uevent: pointer to a uevent function for this struct class_device. If |
254 | * set, this will be called instead of the class specific uevent function. | |
255 | * Only use this if you want to override the default uevent function, like | |
74be227f GKH |
256 | * when you are nesting class_device structures. |
257 | */ | |
1da177e4 LT |
258 | struct class_device { |
259 | struct list_head node; | |
260 | ||
261 | struct kobject kobj; | |
262 | struct class * class; /* required */ | |
263 | dev_t devt; /* dev_t, creates the sysfs "dev" */ | |
e9ba6365 | 264 | struct class_device_attribute *devt_attr; |
a7fd6706 | 265 | struct class_device_attribute uevent_attr; |
1da177e4 LT |
266 | struct device * dev; /* not necessary, but nice to have */ |
267 | void * class_data; /* class-specific data */ | |
51d172d5 | 268 | struct class_device *parent; /* parent of this child device, if there is one */ |
1498221d | 269 | struct attribute_group ** groups; /* optional groups */ |
1da177e4 | 270 | |
51d172d5 | 271 | void (*release)(struct class_device *dev); |
312c004d | 272 | int (*uevent)(struct class_device *dev, char **envp, |
51d172d5 | 273 | int num_envp, char *buffer, int buffer_size); |
1da177e4 LT |
274 | char class_id[BUS_ID_SIZE]; /* unique to this class */ |
275 | }; | |
276 | ||
277 | static inline void * | |
278 | class_get_devdata (struct class_device *dev) | |
279 | { | |
280 | return dev->class_data; | |
281 | } | |
282 | ||
283 | static inline void | |
284 | class_set_devdata (struct class_device *dev, void *data) | |
285 | { | |
286 | dev->class_data = data; | |
287 | } | |
288 | ||
289 | ||
4a7fb636 | 290 | extern int __must_check class_device_register(struct class_device *); |
1da177e4 LT |
291 | extern void class_device_unregister(struct class_device *); |
292 | extern void class_device_initialize(struct class_device *); | |
4a7fb636 | 293 | extern int __must_check class_device_add(struct class_device *); |
1da177e4 LT |
294 | extern void class_device_del(struct class_device *); |
295 | ||
296 | extern int class_device_rename(struct class_device *, char *); | |
297 | ||
298 | extern struct class_device * class_device_get(struct class_device *); | |
299 | extern void class_device_put(struct class_device *); | |
300 | ||
1da177e4 LT |
301 | extern void class_device_remove_file(struct class_device *, |
302 | const struct class_device_attribute *); | |
4a7fb636 | 303 | extern int __must_check class_device_create_bin_file(struct class_device *, |
1da177e4 LT |
304 | struct bin_attribute *); |
305 | extern void class_device_remove_bin_file(struct class_device *, | |
306 | struct bin_attribute *); | |
307 | ||
308 | struct class_interface { | |
309 | struct list_head node; | |
310 | struct class *class; | |
311 | ||
d8539d81 DT |
312 | int (*add) (struct class_device *, struct class_interface *); |
313 | void (*remove) (struct class_device *, struct class_interface *); | |
c47ed219 GKH |
314 | int (*add_dev) (struct device *, struct class_interface *); |
315 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
316 | }; |
317 | ||
4a7fb636 | 318 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
319 | extern void class_interface_unregister(struct class_interface *); |
320 | ||
ab7d7371 | 321 | extern struct class *class_create(struct module *owner, const char *name); |
e9ba6365 | 322 | extern void class_destroy(struct class *cls); |
51d172d5 GKH |
323 | extern struct class_device *class_device_create(struct class *cls, |
324 | struct class_device *parent, | |
325 | dev_t devt, | |
326 | struct device *device, | |
ddd5d35a | 327 | const char *fmt, ...) |
51d172d5 | 328 | __attribute__((format(printf,5,6))); |
e9ba6365 GKH |
329 | extern void class_device_destroy(struct class *cls, dev_t devt); |
330 | ||
a7fd6706 KS |
331 | /* interface for exporting device attributes */ |
332 | struct device_attribute { | |
333 | struct attribute attr; | |
334 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
335 | char *buf); | |
336 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
337 | const char *buf, size_t count); | |
338 | }; | |
339 | ||
340 | #define DEVICE_ATTR(_name,_mode,_show,_store) \ | |
341 | struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store) | |
342 | ||
4a7fb636 AM |
343 | extern int __must_check device_create_file(struct device *device, |
344 | struct device_attribute * entry); | |
a7fd6706 | 345 | extern void device_remove_file(struct device * dev, struct device_attribute * attr); |
2589f188 GKH |
346 | extern int __must_check device_create_bin_file(struct device *dev, |
347 | struct bin_attribute *attr); | |
348 | extern void device_remove_bin_file(struct device *dev, | |
349 | struct bin_attribute *attr); | |
1da177e4 | 350 | struct device { |
36239577 PM |
351 | struct klist klist_children; |
352 | struct klist_node knode_parent; /* node in sibling list */ | |
94e7b1c5 | 353 | struct klist_node knode_driver; |
465c7a3a | 354 | struct klist_node knode_bus; |
1da177e4 LT |
355 | struct device * parent; |
356 | ||
357 | struct kobject kobj; | |
358 | char bus_id[BUS_ID_SIZE]; /* position on parent bus */ | |
f2eaae19 | 359 | unsigned is_registered:1; |
a7fd6706 | 360 | struct device_attribute uevent_attr; |
23681e47 | 361 | struct device_attribute *devt_attr; |
1da177e4 | 362 | |
af70316a PM |
363 | struct semaphore sem; /* semaphore to synchronize calls to |
364 | * its driver. | |
365 | */ | |
366 | ||
1da177e4 LT |
367 | struct bus_type * bus; /* type of bus device is on */ |
368 | struct device_driver *driver; /* which driver has allocated this | |
369 | device */ | |
370 | void *driver_data; /* data private to the driver */ | |
4e10d12a DSL |
371 | void *platform_data; /* Platform specific data, device |
372 | core doesn't touch it */ | |
1da177e4 LT |
373 | struct dev_pm_info power; |
374 | ||
87348136 CH |
375 | #ifdef CONFIG_NUMA |
376 | int numa_node; /* NUMA node this device is close to */ | |
377 | #endif | |
1da177e4 LT |
378 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
379 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
380 | alloc_coherent mappings as | |
381 | not all hardware supports | |
382 | 64 bit addresses for consistent | |
383 | allocations such descriptors. */ | |
384 | ||
385 | struct list_head dma_pools; /* dma pools (if dma'ble) */ | |
386 | ||
387 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
388 | override */ | |
c6dbaef2 BH |
389 | /* arch specific additions */ |
390 | struct dev_archdata archdata; | |
1da177e4 | 391 | |
23681e47 GKH |
392 | /* class_device migration path */ |
393 | struct list_head node; | |
394 | struct class *class; /* optional*/ | |
395 | dev_t devt; /* dev_t, creates the sysfs "dev" */ | |
de0ff00d | 396 | struct attribute_group **groups; /* optional groups */ |
23681e47 | 397 | |
1da177e4 LT |
398 | void (*release)(struct device * dev); |
399 | }; | |
400 | ||
87348136 CH |
401 | #ifdef CONFIG_NUMA |
402 | static inline int dev_to_node(struct device *dev) | |
403 | { | |
404 | return dev->numa_node; | |
405 | } | |
406 | static inline void set_dev_node(struct device *dev, int node) | |
407 | { | |
408 | dev->numa_node = node; | |
409 | } | |
410 | #else | |
411 | static inline int dev_to_node(struct device *dev) | |
412 | { | |
413 | return -1; | |
414 | } | |
415 | static inline void set_dev_node(struct device *dev, int node) | |
416 | { | |
417 | } | |
418 | #endif | |
419 | ||
1da177e4 LT |
420 | static inline void * |
421 | dev_get_drvdata (struct device *dev) | |
422 | { | |
423 | return dev->driver_data; | |
424 | } | |
425 | ||
426 | static inline void | |
427 | dev_set_drvdata (struct device *dev, void *data) | |
428 | { | |
429 | dev->driver_data = data; | |
430 | } | |
431 | ||
d305ef5d DR |
432 | static inline int device_is_registered(struct device *dev) |
433 | { | |
f2eaae19 | 434 | return dev->is_registered; |
d305ef5d DR |
435 | } |
436 | ||
1f21782e AB |
437 | void driver_init(void); |
438 | ||
1da177e4 LT |
439 | /* |
440 | * High level routines for use by the bus drivers | |
441 | */ | |
4a7fb636 | 442 | extern int __must_check device_register(struct device * dev); |
1da177e4 LT |
443 | extern void device_unregister(struct device * dev); |
444 | extern void device_initialize(struct device * dev); | |
4a7fb636 | 445 | extern int __must_check device_add(struct device * dev); |
1da177e4 | 446 | extern void device_del(struct device * dev); |
04fed361 | 447 | extern int device_for_each_child(struct device *, void *, |
1da177e4 | 448 | int (*fn)(struct device *, void *)); |
5ab69981 CH |
449 | extern struct device *device_find_child(struct device *, void *data, |
450 | int (*match)(struct device *, void *)); | |
a2de48ca | 451 | extern int device_rename(struct device *dev, char *new_name); |
8a82472f | 452 | extern int device_move(struct device *dev, struct device *new_parent); |
1da177e4 LT |
453 | |
454 | /* | |
455 | * Manual binding of a device to driver. See drivers/base/bus.c | |
456 | * for information on use. | |
457 | */ | |
f86db396 | 458 | extern int __must_check device_bind_driver(struct device *dev); |
1da177e4 | 459 | extern void device_release_driver(struct device * dev); |
4a7fb636 | 460 | extern int __must_check device_attach(struct device * dev); |
f86db396 AM |
461 | extern int __must_check driver_attach(struct device_driver *drv); |
462 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 463 | |
23681e47 GKH |
464 | /* |
465 | * Easy functions for dynamically creating devices on the fly | |
466 | */ | |
467 | extern struct device *device_create(struct class *cls, struct device *parent, | |
5cbe5f8a | 468 | dev_t devt, const char *fmt, ...) |
23681e47 GKH |
469 | __attribute__((format(printf,4,5))); |
470 | extern void device_destroy(struct class *cls, dev_t devt); | |
1da177e4 | 471 | |
1da177e4 LT |
472 | /* |
473 | * Platform "fixup" functions - allow the platform to have their say | |
474 | * about devices and actions that the general device layer doesn't | |
475 | * know about. | |
476 | */ | |
477 | /* Notify platform of device discovery */ | |
478 | extern int (*platform_notify)(struct device * dev); | |
479 | ||
480 | extern int (*platform_notify_remove)(struct device * dev); | |
481 | ||
482 | ||
483 | /** | |
484 | * get_device - atomically increment the reference count for the device. | |
485 | * | |
486 | */ | |
487 | extern struct device * get_device(struct device * dev); | |
488 | extern void put_device(struct device * dev); | |
1da177e4 LT |
489 | |
490 | ||
116f232b | 491 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
492 | extern void device_shutdown(void); |
493 | ||
494 | ||
495 | /* drivers/base/firmware.c */ | |
4a7fb636 | 496 | extern int __must_check firmware_register(struct subsystem *); |
1da177e4 LT |
497 | extern void firmware_unregister(struct subsystem *); |
498 | ||
499 | /* debugging and troubleshooting/diagnostic helpers. */ | |
3e95637a | 500 | extern const char *dev_driver_string(struct device *dev); |
1da177e4 | 501 | #define dev_printk(level, dev, format, arg...) \ |
3e95637a | 502 | printk(level "%s %s: " format , dev_driver_string(dev) , (dev)->bus_id , ## arg) |
1da177e4 LT |
503 | |
504 | #ifdef DEBUG | |
505 | #define dev_dbg(dev, format, arg...) \ | |
506 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
507 | #else | |
508 | #define dev_dbg(dev, format, arg...) do { (void)(dev); } while (0) | |
509 | #endif | |
510 | ||
511 | #define dev_err(dev, format, arg...) \ | |
512 | dev_printk(KERN_ERR , dev , format , ## arg) | |
513 | #define dev_info(dev, format, arg...) \ | |
514 | dev_printk(KERN_INFO , dev , format , ## arg) | |
515 | #define dev_warn(dev, format, arg...) \ | |
516 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
4f2928d0 TS |
517 | #define dev_notice(dev, format, arg...) \ |
518 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
1da177e4 LT |
519 | |
520 | /* Create alias, so I can be autoloaded. */ | |
521 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
522 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
523 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
524 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
525 | #endif /* _DEVICE_H_ */ |