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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> | |
89790fd7 | 5 | * Copyright (c) 2004-2007 Greg Kroah-Hartman <gregkh@suse.de> |
1da177e4 LT |
6 | * |
7 | * This file is released under the GPLv2 | |
8 | * | |
9 | * See Documentation/driver-model/ for more information. | |
10 | */ | |
11 | ||
12 | #ifndef _DEVICE_H_ | |
13 | #define _DEVICE_H_ | |
14 | ||
1da177e4 LT |
15 | #include <linux/ioport.h> |
16 | #include <linux/kobject.h> | |
465c7a3a | 17 | #include <linux/klist.h> |
1da177e4 | 18 | #include <linux/list.h> |
4a7fb636 | 19 | #include <linux/compiler.h> |
1da177e4 LT |
20 | #include <linux/types.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/pm.h> | |
6188e10d | 23 | #include <linux/semaphore.h> |
1da177e4 | 24 | #include <asm/atomic.h> |
c6dbaef2 | 25 | #include <asm/device.h> |
1da177e4 LT |
26 | |
27 | #define DEVICE_NAME_SIZE 50 | |
d462943a GKH |
28 | /* DEVICE_NAME_HALF is really less than half to accommodate slop */ |
29 | #define DEVICE_NAME_HALF __stringify(20) | |
1da177e4 LT |
30 | #define DEVICE_ID_SIZE 32 |
31 | #define BUS_ID_SIZE KOBJ_NAME_LEN | |
32 | ||
33 | ||
1da177e4 LT |
34 | struct device; |
35 | struct device_driver; | |
e5dd1278 | 36 | struct driver_private; |
1da177e4 | 37 | struct class; |
b8c5cec2 | 38 | struct bus_type; |
c6f7e72a | 39 | struct bus_type_private; |
b8c5cec2 KS |
40 | |
41 | struct bus_attribute { | |
42 | struct attribute attr; | |
d462943a GKH |
43 | ssize_t (*show)(struct bus_type *bus, char *buf); |
44 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); | |
b8c5cec2 KS |
45 | }; |
46 | ||
d462943a GKH |
47 | #define BUS_ATTR(_name, _mode, _show, _store) \ |
48 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
b8c5cec2 KS |
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 *); | |
1da177e4 LT |
53 | |
54 | struct bus_type { | |
d462943a GKH |
55 | const char *name; |
56 | struct bus_attribute *bus_attrs; | |
57 | struct device_attribute *dev_attrs; | |
58 | struct driver_attribute *drv_attrs; | |
59 | ||
60 | int (*match)(struct device *dev, struct device_driver *drv); | |
61 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
62 | int (*probe)(struct device *dev); | |
63 | int (*remove)(struct device *dev); | |
64 | void (*shutdown)(struct device *dev); | |
65 | ||
66 | int (*suspend)(struct device *dev, pm_message_t state); | |
67 | int (*suspend_late)(struct device *dev, pm_message_t state); | |
68 | int (*resume_early)(struct device *dev); | |
69 | int (*resume)(struct device *dev); | |
b8c5cec2 | 70 | |
c6f7e72a | 71 | struct bus_type_private *p; |
1da177e4 LT |
72 | }; |
73 | ||
d462943a GKH |
74 | extern int __must_check bus_register(struct bus_type *bus); |
75 | extern void bus_unregister(struct bus_type *bus); | |
1da177e4 | 76 | |
d462943a | 77 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
1da177e4 | 78 | |
1da177e4 LT |
79 | /* iterator helpers for buses */ |
80 | ||
d462943a GKH |
81 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
82 | int (*fn)(struct device *dev, void *data)); | |
83 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
84 | void *data, | |
85 | int (*match)(struct device *dev, void *data)); | |
1f9ffc04 GKH |
86 | struct device *bus_find_device_by_name(struct bus_type *bus, |
87 | struct device *start, | |
88 | const char *name); | |
1da177e4 | 89 | |
4a7fb636 | 90 | int __must_check bus_for_each_drv(struct bus_type *bus, |
d462943a GKH |
91 | struct device_driver *start, void *data, |
92 | int (*fn)(struct device_driver *, void *)); | |
1da177e4 | 93 | |
116af378 BH |
94 | /* |
95 | * Bus notifiers: Get notified of addition/removal of devices | |
96 | * and binding/unbinding of drivers to devices. | |
97 | * In the long run, it should be a replacement for the platform | |
98 | * notify hooks. | |
99 | */ | |
100 | struct notifier_block; | |
101 | ||
102 | extern int bus_register_notifier(struct bus_type *bus, | |
103 | struct notifier_block *nb); | |
104 | extern int bus_unregister_notifier(struct bus_type *bus, | |
105 | struct notifier_block *nb); | |
106 | ||
107 | /* All 4 notifers below get called with the target struct device * | |
108 | * as an argument. Note that those functions are likely to be called | |
109 | * with the device semaphore held in the core, so be careful. | |
110 | */ | |
111 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
112 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
113 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ | |
114 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be | |
115 | unbound */ | |
116 | ||
0fed80f7 | 117 | extern struct kset *bus_get_kset(struct bus_type *bus); |
b249072e | 118 | extern struct klist *bus_get_device_klist(struct bus_type *bus); |
0fed80f7 | 119 | |
1da177e4 | 120 | struct device_driver { |
e5dd1278 GKH |
121 | const char *name; |
122 | struct bus_type *bus; | |
1da177e4 | 123 | |
e5dd1278 GKH |
124 | struct module *owner; |
125 | const char *mod_name; /* used for built-in modules */ | |
1da177e4 | 126 | |
d462943a GKH |
127 | int (*probe) (struct device *dev); |
128 | int (*remove) (struct device *dev); | |
129 | void (*shutdown) (struct device *dev); | |
130 | int (*suspend) (struct device *dev, pm_message_t state); | |
131 | int (*resume) (struct device *dev); | |
57c74534 | 132 | struct attribute_group **groups; |
e5dd1278 GKH |
133 | |
134 | struct driver_private *p; | |
1da177e4 LT |
135 | }; |
136 | ||
137 | ||
d462943a GKH |
138 | extern int __must_check driver_register(struct device_driver *drv); |
139 | extern void driver_unregister(struct device_driver *drv); | |
1da177e4 | 140 | |
d462943a GKH |
141 | extern struct device_driver *get_driver(struct device_driver *drv); |
142 | extern void put_driver(struct device_driver *drv); | |
143 | extern struct device_driver *driver_find(const char *name, | |
144 | struct bus_type *bus); | |
d779249e | 145 | extern int driver_probe_done(void); |
1da177e4 | 146 | |
405ae7d3 | 147 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
148 | |
149 | struct driver_attribute { | |
d462943a GKH |
150 | struct attribute attr; |
151 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
152 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
153 | size_t count); | |
1da177e4 LT |
154 | }; |
155 | ||
d462943a GKH |
156 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
157 | struct driver_attribute driver_attr_##_name = \ | |
158 | __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 159 | |
d462943a GKH |
160 | extern int __must_check driver_create_file(struct device_driver *driver, |
161 | struct driver_attribute *attr); | |
162 | extern void driver_remove_file(struct device_driver *driver, | |
163 | struct driver_attribute *attr); | |
1da177e4 | 164 | |
cbe9c595 GKH |
165 | extern int __must_check driver_add_kobj(struct device_driver *drv, |
166 | struct kobject *kobj, | |
167 | const char *fmt, ...); | |
168 | ||
d462943a GKH |
169 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
170 | struct device *start, | |
171 | void *data, | |
172 | int (*fn)(struct device *dev, | |
173 | void *)); | |
174 | struct device *driver_find_device(struct device_driver *drv, | |
175 | struct device *start, void *data, | |
176 | int (*match)(struct device *dev, void *data)); | |
fae3cd00 | 177 | |
1da177e4 LT |
178 | /* |
179 | * device classes | |
180 | */ | |
181 | struct class { | |
d462943a GKH |
182 | const char *name; |
183 | struct module *owner; | |
1da177e4 | 184 | |
823bccfc | 185 | struct kset subsys; |
23681e47 | 186 | struct list_head devices; |
1da177e4 | 187 | struct list_head interfaces; |
86406245 | 188 | struct kset class_dirs; |
fd04897b | 189 | struct semaphore sem; /* locks children, devices, interfaces */ |
d462943a | 190 | struct class_attribute *class_attrs; |
d462943a | 191 | struct device_attribute *dev_attrs; |
1da177e4 | 192 | |
d462943a | 193 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
1da177e4 | 194 | |
d462943a GKH |
195 | void (*class_release)(struct class *class); |
196 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 197 | |
d462943a GKH |
198 | int (*suspend)(struct device *dev, pm_message_t state); |
199 | int (*resume)(struct device *dev); | |
1da177e4 LT |
200 | }; |
201 | ||
d462943a GKH |
202 | extern int __must_check class_register(struct class *class); |
203 | extern void class_unregister(struct class *class); | |
fd04897b DY |
204 | extern int class_for_each_device(struct class *class, void *data, |
205 | int (*fn)(struct device *dev, void *data)); | |
206 | extern struct device *class_find_device(struct class *class, void *data, | |
207 | int (*match)(struct device *, void *)); | |
1da177e4 LT |
208 | |
209 | struct class_attribute { | |
d462943a GKH |
210 | struct attribute attr; |
211 | ssize_t (*show)(struct class *class, char *buf); | |
212 | ssize_t (*store)(struct class *class, const char *buf, size_t count); | |
1da177e4 LT |
213 | }; |
214 | ||
d462943a GKH |
215 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
216 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
1da177e4 | 217 | |
d462943a GKH |
218 | extern int __must_check class_create_file(struct class *class, |
219 | const struct class_attribute *attr); | |
220 | extern void class_remove_file(struct class *class, | |
221 | const struct class_attribute *attr); | |
1da177e4 | 222 | |
1da177e4 LT |
223 | struct class_interface { |
224 | struct list_head node; | |
225 | struct class *class; | |
226 | ||
c47ed219 GKH |
227 | int (*add_dev) (struct device *, struct class_interface *); |
228 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
229 | }; |
230 | ||
4a7fb636 | 231 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
232 | extern void class_interface_unregister(struct class_interface *); |
233 | ||
ab7d7371 | 234 | extern struct class *class_create(struct module *owner, const char *name); |
e9ba6365 | 235 | extern void class_destroy(struct class *cls); |
e9ba6365 | 236 | |
414264f9 KS |
237 | /* |
238 | * The type of device, "struct device" is embedded in. A class | |
239 | * or bus can contain devices of different types | |
240 | * like "partitions" and "disks", "mouse" and "event". | |
241 | * This identifies the device type and carries type-specific | |
242 | * information, equivalent to the kobj_type of a kobject. | |
243 | * If "name" is specified, the uevent will contain it in | |
244 | * the DEVTYPE variable. | |
245 | */ | |
f9f852df | 246 | struct device_type { |
414264f9 | 247 | const char *name; |
621a1672 | 248 | struct attribute_group **groups; |
7eff2e7a | 249 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
f9f852df | 250 | void (*release)(struct device *dev); |
d462943a GKH |
251 | int (*suspend)(struct device *dev, pm_message_t state); |
252 | int (*resume)(struct device *dev); | |
f9f852df KS |
253 | }; |
254 | ||
a7fd6706 KS |
255 | /* interface for exporting device attributes */ |
256 | struct device_attribute { | |
257 | struct attribute attr; | |
258 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
259 | char *buf); | |
260 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
261 | const char *buf, size_t count); | |
262 | }; | |
263 | ||
d462943a GKH |
264 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
265 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
a7fd6706 | 266 | |
4a7fb636 | 267 | extern int __must_check device_create_file(struct device *device, |
d462943a GKH |
268 | struct device_attribute *entry); |
269 | extern void device_remove_file(struct device *dev, | |
270 | struct device_attribute *attr); | |
2589f188 GKH |
271 | extern int __must_check device_create_bin_file(struct device *dev, |
272 | struct bin_attribute *attr); | |
273 | extern void device_remove_bin_file(struct device *dev, | |
274 | struct bin_attribute *attr); | |
523ded71 | 275 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 276 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
277 | |
278 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
279 | #define device_schedule_callback(dev, func) \ | |
280 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
281 | |
282 | /* device resource management */ | |
283 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
284 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
285 | ||
286 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 287 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
288 | const char *name); |
289 | #define devres_alloc(release, size, gfp) \ | |
290 | __devres_alloc(release, size, gfp, #release) | |
291 | #else | |
d462943a | 292 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e TH |
293 | #endif |
294 | extern void devres_free(void *res); | |
295 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 296 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 297 | dr_match_t match, void *match_data); |
d462943a GKH |
298 | extern void *devres_get(struct device *dev, void *new_res, |
299 | dr_match_t match, void *match_data); | |
300 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
301 | dr_match_t match, void *match_data); | |
9ac7849e TH |
302 | extern int devres_destroy(struct device *dev, dr_release_t release, |
303 | dr_match_t match, void *match_data); | |
304 | ||
305 | /* devres group */ | |
306 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
307 | gfp_t gfp); | |
308 | extern void devres_close_group(struct device *dev, void *id); | |
309 | extern void devres_remove_group(struct device *dev, void *id); | |
310 | extern int devres_release_group(struct device *dev, void *id); | |
311 | ||
312 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
313 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
314 | extern void devm_kfree(struct device *dev, void *p); | |
315 | ||
6b7b6510 FT |
316 | struct device_dma_parameters { |
317 | /* | |
318 | * a low level driver may set these to teach IOMMU code about | |
319 | * sg limitations. | |
320 | */ | |
321 | unsigned int max_segment_size; | |
322 | unsigned long segment_boundary_mask; | |
323 | }; | |
324 | ||
1da177e4 | 325 | struct device { |
36239577 | 326 | struct klist klist_children; |
d462943a | 327 | struct klist_node knode_parent; /* node in sibling list */ |
94e7b1c5 | 328 | struct klist_node knode_driver; |
465c7a3a | 329 | struct klist_node knode_bus; |
49a4ec18 | 330 | struct device *parent; |
1da177e4 LT |
331 | |
332 | struct kobject kobj; | |
333 | char bus_id[BUS_ID_SIZE]; /* position on parent bus */ | |
f9f852df | 334 | struct device_type *type; |
49a4ec18 | 335 | unsigned uevent_suppress:1; |
1da177e4 | 336 | |
af70316a PM |
337 | struct semaphore sem; /* semaphore to synchronize calls to |
338 | * its driver. | |
339 | */ | |
340 | ||
d462943a | 341 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
342 | struct device_driver *driver; /* which driver has allocated this |
343 | device */ | |
344 | void *driver_data; /* data private to the driver */ | |
4e10d12a DSL |
345 | void *platform_data; /* Platform specific data, device |
346 | core doesn't touch it */ | |
1da177e4 LT |
347 | struct dev_pm_info power; |
348 | ||
87348136 CH |
349 | #ifdef CONFIG_NUMA |
350 | int numa_node; /* NUMA node this device is close to */ | |
351 | #endif | |
1da177e4 LT |
352 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
353 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
354 | alloc_coherent mappings as | |
355 | not all hardware supports | |
356 | 64 bit addresses for consistent | |
357 | allocations such descriptors. */ | |
358 | ||
6b7b6510 FT |
359 | struct device_dma_parameters *dma_parms; |
360 | ||
1da177e4 LT |
361 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
362 | ||
363 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
364 | override */ | |
c6dbaef2 BH |
365 | /* arch specific additions */ |
366 | struct dev_archdata archdata; | |
1da177e4 | 367 | |
9ac7849e TH |
368 | spinlock_t devres_lock; |
369 | struct list_head devres_head; | |
370 | ||
23681e47 | 371 | struct list_head node; |
b7a3e813 | 372 | struct class *class; |
d462943a | 373 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
de0ff00d | 374 | struct attribute_group **groups; /* optional groups */ |
23681e47 | 375 | |
d462943a | 376 | void (*release)(struct device *dev); |
1da177e4 LT |
377 | }; |
378 | ||
9a3df1f7 AS |
379 | /* Get the wakeup routines, which depend on struct device */ |
380 | #include <linux/pm_wakeup.h> | |
381 | ||
06916639 KS |
382 | static inline const char *dev_name(struct device *dev) |
383 | { | |
384 | /* will be changed into kobject_name(&dev->kobj) in the near future */ | |
385 | return dev->bus_id; | |
386 | } | |
387 | ||
413c239f SR |
388 | extern int dev_set_name(struct device *dev, const char *name, ...) |
389 | __attribute__((format(printf, 2, 3))); | |
390 | ||
87348136 CH |
391 | #ifdef CONFIG_NUMA |
392 | static inline int dev_to_node(struct device *dev) | |
393 | { | |
394 | return dev->numa_node; | |
395 | } | |
396 | static inline void set_dev_node(struct device *dev, int node) | |
397 | { | |
398 | dev->numa_node = node; | |
399 | } | |
400 | #else | |
401 | static inline int dev_to_node(struct device *dev) | |
402 | { | |
403 | return -1; | |
404 | } | |
405 | static inline void set_dev_node(struct device *dev, int node) | |
406 | { | |
407 | } | |
408 | #endif | |
409 | ||
d462943a | 410 | static inline void *dev_get_drvdata(struct device *dev) |
1da177e4 LT |
411 | { |
412 | return dev->driver_data; | |
413 | } | |
414 | ||
d462943a | 415 | static inline void dev_set_drvdata(struct device *dev, void *data) |
1da177e4 LT |
416 | { |
417 | dev->driver_data = data; | |
418 | } | |
419 | ||
d305ef5d DR |
420 | static inline int device_is_registered(struct device *dev) |
421 | { | |
3f62e570 | 422 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
423 | } |
424 | ||
1f21782e AB |
425 | void driver_init(void); |
426 | ||
1da177e4 LT |
427 | /* |
428 | * High level routines for use by the bus drivers | |
429 | */ | |
d462943a GKH |
430 | extern int __must_check device_register(struct device *dev); |
431 | extern void device_unregister(struct device *dev); | |
432 | extern void device_initialize(struct device *dev); | |
433 | extern int __must_check device_add(struct device *dev); | |
434 | extern void device_del(struct device *dev); | |
435 | extern int device_for_each_child(struct device *dev, void *data, | |
436 | int (*fn)(struct device *dev, void *data)); | |
437 | extern struct device *device_find_child(struct device *dev, void *data, | |
438 | int (*match)(struct device *dev, void *data)); | |
a2de48ca | 439 | extern int device_rename(struct device *dev, char *new_name); |
8a82472f | 440 | extern int device_move(struct device *dev, struct device *new_parent); |
1da177e4 LT |
441 | |
442 | /* | |
443 | * Manual binding of a device to driver. See drivers/base/bus.c | |
444 | * for information on use. | |
445 | */ | |
f86db396 | 446 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
447 | extern void device_release_driver(struct device *dev); |
448 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
449 | extern int __must_check driver_attach(struct device_driver *drv); |
450 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 451 | |
23681e47 GKH |
452 | /* |
453 | * Easy functions for dynamically creating devices on the fly | |
454 | */ | |
8882b394 GKH |
455 | extern struct device *device_create_vargs(struct class *cls, |
456 | struct device *parent, | |
457 | dev_t devt, | |
458 | void *drvdata, | |
459 | const char *fmt, | |
460 | va_list vargs); | |
23681e47 | 461 | extern struct device *device_create(struct class *cls, struct device *parent, |
5cbe5f8a | 462 | dev_t devt, const char *fmt, ...) |
d462943a | 463 | __attribute__((format(printf, 4, 5))); |
8882b394 GKH |
464 | extern struct device *device_create_drvdata(struct class *cls, |
465 | struct device *parent, | |
466 | dev_t devt, | |
467 | void *drvdata, | |
468 | const char *fmt, ...) | |
469 | __attribute__((format(printf, 5, 6))); | |
23681e47 | 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 */ | |
d462943a | 478 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 479 | |
d462943a | 480 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
481 | |
482 | ||
483 | /** | |
484 | * get_device - atomically increment the reference count for the device. | |
485 | * | |
486 | */ | |
d462943a GKH |
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 | ||
58b3b71d RW |
494 | /* drivers/base/sys.c */ |
495 | extern void sysdev_shutdown(void); | |
496 | ||
1da177e4 | 497 | /* debugging and troubleshooting/diagnostic helpers. */ |
3e95637a | 498 | extern const char *dev_driver_string(struct device *dev); |
1da177e4 | 499 | #define dev_printk(level, dev, format, arg...) \ |
d462943a | 500 | printk(level "%s %s: " format , dev_driver_string(dev) , \ |
06916639 | 501 | dev_name(dev) , ## arg) |
1da177e4 | 502 | |
7b8712e5 EM |
503 | #define dev_emerg(dev, format, arg...) \ |
504 | dev_printk(KERN_EMERG , dev , format , ## arg) | |
505 | #define dev_alert(dev, format, arg...) \ | |
506 | dev_printk(KERN_ALERT , dev , format , ## arg) | |
507 | #define dev_crit(dev, format, arg...) \ | |
508 | dev_printk(KERN_CRIT , dev , format , ## arg) | |
509 | #define dev_err(dev, format, arg...) \ | |
510 | dev_printk(KERN_ERR , dev , format , ## arg) | |
511 | #define dev_warn(dev, format, arg...) \ | |
512 | dev_printk(KERN_WARNING , dev , format , ## arg) | |
513 | #define dev_notice(dev, format, arg...) \ | |
514 | dev_printk(KERN_NOTICE , dev , format , ## arg) | |
515 | #define dev_info(dev, format, arg...) \ | |
516 | dev_printk(KERN_INFO , dev , format , ## arg) | |
517 | ||
1da177e4 LT |
518 | #ifdef DEBUG |
519 | #define dev_dbg(dev, format, arg...) \ | |
520 | dev_printk(KERN_DEBUG , dev , format , ## arg) | |
521 | #else | |
1429db83 JP |
522 | #define dev_dbg(dev, format, arg...) \ |
523 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
1da177e4 LT |
524 | #endif |
525 | ||
aebdc3b4 DB |
526 | #ifdef VERBOSE_DEBUG |
527 | #define dev_vdbg dev_dbg | |
528 | #else | |
1429db83 JP |
529 | |
530 | #define dev_vdbg(dev, format, arg...) \ | |
531 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) | |
aebdc3b4 DB |
532 | #endif |
533 | ||
1da177e4 LT |
534 | /* Create alias, so I can be autoloaded. */ |
535 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
536 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
537 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
538 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
539 | #endif /* _DEVICE_H_ */ |