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1da177e4 LT |
1 | /* |
2 | * device.h - generic, centralized driver model | |
3 | * | |
4 | * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org> | |
b4028437 GKH |
5 | * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de> |
6 | * Copyright (c) 2008-2009 Novell Inc. | |
1da177e4 LT |
7 | * |
8 | * This file is released under the GPLv2 | |
9 | * | |
10 | * See Documentation/driver-model/ for more information. | |
11 | */ | |
12 | ||
13 | #ifndef _DEVICE_H_ | |
14 | #define _DEVICE_H_ | |
15 | ||
1da177e4 LT |
16 | #include <linux/ioport.h> |
17 | #include <linux/kobject.h> | |
465c7a3a | 18 | #include <linux/klist.h> |
1da177e4 | 19 | #include <linux/list.h> |
d2a3b914 | 20 | #include <linux/lockdep.h> |
4a7fb636 | 21 | #include <linux/compiler.h> |
1da177e4 | 22 | #include <linux/types.h> |
de477254 | 23 | #include <linux/mutex.h> |
ab78029e | 24 | #include <linux/pinctrl/devinfo.h> |
1da177e4 | 25 | #include <linux/pm.h> |
60063497 | 26 | #include <linux/atomic.h> |
6ca04593 | 27 | #include <linux/ratelimit.h> |
3c2670e6 | 28 | #include <linux/uidgid.h> |
c6dbaef2 | 29 | #include <asm/device.h> |
1da177e4 | 30 | |
1da177e4 | 31 | struct device; |
fb069a5d | 32 | struct device_private; |
1da177e4 | 33 | struct device_driver; |
e5dd1278 | 34 | struct driver_private; |
de477254 | 35 | struct module; |
1da177e4 | 36 | struct class; |
6b6e39a6 | 37 | struct subsys_private; |
b8c5cec2 | 38 | struct bus_type; |
d706c1b0 | 39 | struct device_node; |
ff21776d | 40 | struct iommu_ops; |
74416e1e | 41 | struct iommu_group; |
b8c5cec2 KS |
42 | |
43 | struct bus_attribute { | |
44 | struct attribute attr; | |
d462943a GKH |
45 | ssize_t (*show)(struct bus_type *bus, char *buf); |
46 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); | |
b8c5cec2 KS |
47 | }; |
48 | ||
d462943a | 49 | #define BUS_ATTR(_name, _mode, _show, _store) \ |
ced321bf GKH |
50 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) |
51 | #define BUS_ATTR_RW(_name) \ | |
52 | struct bus_attribute bus_attr_##_name = __ATTR_RW(_name) | |
53 | #define BUS_ATTR_RO(_name) \ | |
54 | struct bus_attribute bus_attr_##_name = __ATTR_RO(_name) | |
b8c5cec2 KS |
55 | |
56 | extern int __must_check bus_create_file(struct bus_type *, | |
57 | struct bus_attribute *); | |
58 | extern void bus_remove_file(struct bus_type *, struct bus_attribute *); | |
1da177e4 | 59 | |
880ffb5c WG |
60 | /** |
61 | * struct bus_type - The bus type of the device | |
62 | * | |
63 | * @name: The name of the bus. | |
ca22e56d KS |
64 | * @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id). |
65 | * @dev_root: Default device to use as the parent. | |
880ffb5c WG |
66 | * @bus_attrs: Default attributes of the bus. |
67 | * @dev_attrs: Default attributes of the devices on the bus. | |
68 | * @drv_attrs: Default attributes of the device drivers on the bus. | |
12478ba0 | 69 | * @bus_groups: Default attributes of the bus. |
fa6fdb33 | 70 | * @dev_groups: Default attributes of the devices on the bus. |
ed0617b5 | 71 | * @drv_groups: Default attributes of the device drivers on the bus. |
880ffb5c WG |
72 | * @match: Called, perhaps multiple times, whenever a new device or driver |
73 | * is added for this bus. It should return a nonzero value if the | |
74 | * given device can be handled by the given driver. | |
75 | * @uevent: Called when a device is added, removed, or a few other things | |
76 | * that generate uevents to add the environment variables. | |
77 | * @probe: Called when a new device or driver add to this bus, and callback | |
78 | * the specific driver's probe to initial the matched device. | |
79 | * @remove: Called when a device removed from this bus. | |
80 | * @shutdown: Called at shut-down time to quiesce the device. | |
4f3549d7 RW |
81 | * |
82 | * @online: Called to put the device back online (after offlining it). | |
83 | * @offline: Called to put the device offline for hot-removal. May fail. | |
84 | * | |
880ffb5c WG |
85 | * @suspend: Called when a device on this bus wants to go to sleep mode. |
86 | * @resume: Called to bring a device on this bus out of sleep mode. | |
87 | * @pm: Power management operations of this bus, callback the specific | |
88 | * device driver's pm-ops. | |
7b08fae8 | 89 | * @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU |
ff21776d JR |
90 | * driver implementations to a bus and allow the driver to do |
91 | * bus-specific setup | |
880ffb5c WG |
92 | * @p: The private data of the driver core, only the driver core can |
93 | * touch this. | |
bfd63cd2 | 94 | * @lock_key: Lock class key for use by the lock validator |
880ffb5c WG |
95 | * |
96 | * A bus is a channel between the processor and one or more devices. For the | |
97 | * purposes of the device model, all devices are connected via a bus, even if | |
98 | * it is an internal, virtual, "platform" bus. Buses can plug into each other. | |
99 | * A USB controller is usually a PCI device, for example. The device model | |
100 | * represents the actual connections between buses and the devices they control. | |
101 | * A bus is represented by the bus_type structure. It contains the name, the | |
102 | * default attributes, the bus' methods, PM operations, and the driver core's | |
103 | * private data. | |
104 | */ | |
1da177e4 | 105 | struct bus_type { |
d462943a | 106 | const char *name; |
ca22e56d KS |
107 | const char *dev_name; |
108 | struct device *dev_root; | |
12478ba0 | 109 | struct bus_attribute *bus_attrs; /* use bus_groups instead */ |
fa6fdb33 | 110 | struct device_attribute *dev_attrs; /* use dev_groups instead */ |
ed0617b5 | 111 | struct driver_attribute *drv_attrs; /* use drv_groups instead */ |
12478ba0 | 112 | const struct attribute_group **bus_groups; |
fa6fdb33 | 113 | const struct attribute_group **dev_groups; |
ed0617b5 | 114 | const struct attribute_group **drv_groups; |
d462943a GKH |
115 | |
116 | int (*match)(struct device *dev, struct device_driver *drv); | |
117 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); | |
118 | int (*probe)(struct device *dev); | |
119 | int (*remove)(struct device *dev); | |
120 | void (*shutdown)(struct device *dev); | |
121 | ||
4f3549d7 RW |
122 | int (*online)(struct device *dev); |
123 | int (*offline)(struct device *dev); | |
124 | ||
d462943a | 125 | int (*suspend)(struct device *dev, pm_message_t state); |
d462943a | 126 | int (*resume)(struct device *dev); |
b8c5cec2 | 127 | |
8150f32b | 128 | const struct dev_pm_ops *pm; |
1eede070 | 129 | |
ff21776d JR |
130 | struct iommu_ops *iommu_ops; |
131 | ||
6b6e39a6 | 132 | struct subsys_private *p; |
be871b7e | 133 | struct lock_class_key lock_key; |
1da177e4 LT |
134 | }; |
135 | ||
be871b7e MH |
136 | extern int __must_check bus_register(struct bus_type *bus); |
137 | ||
d462943a | 138 | extern void bus_unregister(struct bus_type *bus); |
1da177e4 | 139 | |
d462943a | 140 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
1da177e4 | 141 | |
1da177e4 | 142 | /* iterator helpers for buses */ |
ca22e56d KS |
143 | struct subsys_dev_iter { |
144 | struct klist_iter ki; | |
145 | const struct device_type *type; | |
146 | }; | |
7cd9c9bb | 147 | void subsys_dev_iter_init(struct subsys_dev_iter *iter, |
ca22e56d KS |
148 | struct bus_type *subsys, |
149 | struct device *start, | |
150 | const struct device_type *type); | |
151 | struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter); | |
152 | void subsys_dev_iter_exit(struct subsys_dev_iter *iter); | |
1da177e4 | 153 | |
d462943a GKH |
154 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
155 | int (*fn)(struct device *dev, void *data)); | |
156 | struct device *bus_find_device(struct bus_type *bus, struct device *start, | |
157 | void *data, | |
158 | int (*match)(struct device *dev, void *data)); | |
1f9ffc04 GKH |
159 | struct device *bus_find_device_by_name(struct bus_type *bus, |
160 | struct device *start, | |
161 | const char *name); | |
ca22e56d KS |
162 | struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id, |
163 | struct device *hint); | |
cc7447a5 JD |
164 | int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, |
165 | void *data, int (*fn)(struct device_driver *, void *)); | |
99178b03 GKH |
166 | void bus_sort_breadthfirst(struct bus_type *bus, |
167 | int (*compare)(const struct device *a, | |
168 | const struct device *b)); | |
116af378 BH |
169 | /* |
170 | * Bus notifiers: Get notified of addition/removal of devices | |
171 | * and binding/unbinding of drivers to devices. | |
172 | * In the long run, it should be a replacement for the platform | |
173 | * notify hooks. | |
174 | */ | |
175 | struct notifier_block; | |
176 | ||
177 | extern int bus_register_notifier(struct bus_type *bus, | |
178 | struct notifier_block *nb); | |
179 | extern int bus_unregister_notifier(struct bus_type *bus, | |
180 | struct notifier_block *nb); | |
181 | ||
182 | /* All 4 notifers below get called with the target struct device * | |
183 | * as an argument. Note that those functions are likely to be called | |
8e9394ce | 184 | * with the device lock held in the core, so be careful. |
116af378 BH |
185 | */ |
186 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ | |
187 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ | |
45daef0f MD |
188 | #define BUS_NOTIFY_BIND_DRIVER 0x00000003 /* driver about to be |
189 | bound */ | |
190 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000004 /* driver bound to device */ | |
191 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000005 /* driver about to be | |
116af378 | 192 | unbound */ |
45daef0f | 193 | #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000006 /* driver is unbound |
309b7d60 | 194 | from the device */ |
116af378 | 195 | |
0fed80f7 | 196 | extern struct kset *bus_get_kset(struct bus_type *bus); |
b249072e | 197 | extern struct klist *bus_get_device_klist(struct bus_type *bus); |
0fed80f7 | 198 | |
880ffb5c WG |
199 | /** |
200 | * struct device_driver - The basic device driver structure | |
201 | * @name: Name of the device driver. | |
202 | * @bus: The bus which the device of this driver belongs to. | |
203 | * @owner: The module owner. | |
204 | * @mod_name: Used for built-in modules. | |
205 | * @suppress_bind_attrs: Disables bind/unbind via sysfs. | |
206 | * @of_match_table: The open firmware table. | |
06f64c8f | 207 | * @acpi_match_table: The ACPI match table. |
880ffb5c WG |
208 | * @probe: Called to query the existence of a specific device, |
209 | * whether this driver can work with it, and bind the driver | |
210 | * to a specific device. | |
211 | * @remove: Called when the device is removed from the system to | |
212 | * unbind a device from this driver. | |
213 | * @shutdown: Called at shut-down time to quiesce the device. | |
214 | * @suspend: Called to put the device to sleep mode. Usually to a | |
215 | * low power state. | |
216 | * @resume: Called to bring a device from sleep mode. | |
217 | * @groups: Default attributes that get created by the driver core | |
218 | * automatically. | |
219 | * @pm: Power management operations of the device which matched | |
220 | * this driver. | |
221 | * @p: Driver core's private data, no one other than the driver | |
222 | * core can touch this. | |
223 | * | |
224 | * The device driver-model tracks all of the drivers known to the system. | |
225 | * The main reason for this tracking is to enable the driver core to match | |
226 | * up drivers with new devices. Once drivers are known objects within the | |
227 | * system, however, a number of other things become possible. Device drivers | |
228 | * can export information and configuration variables that are independent | |
229 | * of any specific device. | |
230 | */ | |
1da177e4 | 231 | struct device_driver { |
e5dd1278 GKH |
232 | const char *name; |
233 | struct bus_type *bus; | |
1da177e4 | 234 | |
e5dd1278 | 235 | struct module *owner; |
1a6f2a75 DT |
236 | const char *mod_name; /* used for built-in modules */ |
237 | ||
238 | bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ | |
1da177e4 | 239 | |
597b9d1e | 240 | const struct of_device_id *of_match_table; |
06f64c8f | 241 | const struct acpi_device_id *acpi_match_table; |
597b9d1e | 242 | |
d462943a GKH |
243 | int (*probe) (struct device *dev); |
244 | int (*remove) (struct device *dev); | |
245 | void (*shutdown) (struct device *dev); | |
246 | int (*suspend) (struct device *dev, pm_message_t state); | |
247 | int (*resume) (struct device *dev); | |
a4dbd674 | 248 | const struct attribute_group **groups; |
e5dd1278 | 249 | |
8150f32b | 250 | const struct dev_pm_ops *pm; |
1eede070 | 251 | |
e5dd1278 | 252 | struct driver_private *p; |
1da177e4 LT |
253 | }; |
254 | ||
255 | ||
d462943a GKH |
256 | extern int __must_check driver_register(struct device_driver *drv); |
257 | extern void driver_unregister(struct device_driver *drv); | |
1da177e4 | 258 | |
d462943a GKH |
259 | extern struct device_driver *driver_find(const char *name, |
260 | struct bus_type *bus); | |
d779249e | 261 | extern int driver_probe_done(void); |
b23530eb | 262 | extern void wait_for_device_probe(void); |
216773a7 | 263 | |
1da177e4 | 264 | |
405ae7d3 | 265 | /* sysfs interface for exporting driver attributes */ |
1da177e4 LT |
266 | |
267 | struct driver_attribute { | |
d462943a GKH |
268 | struct attribute attr; |
269 | ssize_t (*show)(struct device_driver *driver, char *buf); | |
270 | ssize_t (*store)(struct device_driver *driver, const char *buf, | |
271 | size_t count); | |
1da177e4 LT |
272 | }; |
273 | ||
ced321bf GKH |
274 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
275 | struct driver_attribute driver_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
276 | #define DRIVER_ATTR_RW(_name) \ | |
277 | struct driver_attribute driver_attr_##_name = __ATTR_RW(_name) | |
278 | #define DRIVER_ATTR_RO(_name) \ | |
279 | struct driver_attribute driver_attr_##_name = __ATTR_RO(_name) | |
1da177e4 | 280 | |
d462943a | 281 | extern int __must_check driver_create_file(struct device_driver *driver, |
099c2f21 | 282 | const struct driver_attribute *attr); |
d462943a | 283 | extern void driver_remove_file(struct device_driver *driver, |
099c2f21 | 284 | const struct driver_attribute *attr); |
1da177e4 | 285 | |
d462943a GKH |
286 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
287 | struct device *start, | |
288 | void *data, | |
289 | int (*fn)(struct device *dev, | |
290 | void *)); | |
291 | struct device *driver_find_device(struct device_driver *drv, | |
292 | struct device *start, void *data, | |
293 | int (*match)(struct device *dev, void *data)); | |
fae3cd00 | 294 | |
ca22e56d KS |
295 | /** |
296 | * struct subsys_interface - interfaces to device functions | |
2eda013f RD |
297 | * @name: name of the device function |
298 | * @subsys: subsytem of the devices to attach to | |
299 | * @node: the list of functions registered at the subsystem | |
300 | * @add_dev: device hookup to device function handler | |
301 | * @remove_dev: device hookup to device function handler | |
ca22e56d KS |
302 | * |
303 | * Simple interfaces attached to a subsystem. Multiple interfaces can | |
304 | * attach to a subsystem and its devices. Unlike drivers, they do not | |
305 | * exclusively claim or control devices. Interfaces usually represent | |
306 | * a specific functionality of a subsystem/class of devices. | |
307 | */ | |
308 | struct subsys_interface { | |
309 | const char *name; | |
310 | struct bus_type *subsys; | |
311 | struct list_head node; | |
312 | int (*add_dev)(struct device *dev, struct subsys_interface *sif); | |
313 | int (*remove_dev)(struct device *dev, struct subsys_interface *sif); | |
314 | }; | |
315 | ||
316 | int subsys_interface_register(struct subsys_interface *sif); | |
317 | void subsys_interface_unregister(struct subsys_interface *sif); | |
318 | ||
319 | int subsys_system_register(struct bus_type *subsys, | |
320 | const struct attribute_group **groups); | |
d73ce004 TH |
321 | int subsys_virtual_register(struct bus_type *subsys, |
322 | const struct attribute_group **groups); | |
ca22e56d | 323 | |
880ffb5c WG |
324 | /** |
325 | * struct class - device classes | |
326 | * @name: Name of the class. | |
327 | * @owner: The module owner. | |
328 | * @class_attrs: Default attributes of this class. | |
d05a6f96 | 329 | * @dev_groups: Default attributes of the devices that belong to the class. |
880ffb5c WG |
330 | * @dev_attrs: Default attributes of the devices belong to the class. |
331 | * @dev_bin_attrs: Default binary attributes of the devices belong to the class. | |
332 | * @dev_kobj: The kobject that represents this class and links it into the hierarchy. | |
333 | * @dev_uevent: Called when a device is added, removed from this class, or a | |
334 | * few other things that generate uevents to add the environment | |
335 | * variables. | |
336 | * @devnode: Callback to provide the devtmpfs. | |
337 | * @class_release: Called to release this class. | |
338 | * @dev_release: Called to release the device. | |
339 | * @suspend: Used to put the device to sleep mode, usually to a low power | |
340 | * state. | |
341 | * @resume: Used to bring the device from the sleep mode. | |
342 | * @ns_type: Callbacks so sysfs can detemine namespaces. | |
343 | * @namespace: Namespace of the device belongs to this class. | |
344 | * @pm: The default device power management operations of this class. | |
345 | * @p: The private data of the driver core, no one other than the | |
346 | * driver core can touch this. | |
347 | * | |
348 | * A class is a higher-level view of a device that abstracts out low-level | |
349 | * implementation details. Drivers may see a SCSI disk or an ATA disk, but, | |
350 | * at the class level, they are all simply disks. Classes allow user space | |
351 | * to work with devices based on what they do, rather than how they are | |
352 | * connected or how they work. | |
1da177e4 LT |
353 | */ |
354 | struct class { | |
d462943a GKH |
355 | const char *name; |
356 | struct module *owner; | |
1da177e4 | 357 | |
d462943a | 358 | struct class_attribute *class_attrs; |
d05a6f96 GKH |
359 | struct device_attribute *dev_attrs; /* use dev_groups instead */ |
360 | const struct attribute_group **dev_groups; | |
c97415a7 | 361 | struct bin_attribute *dev_bin_attrs; |
e105b8bf | 362 | struct kobject *dev_kobj; |
1da177e4 | 363 | |
d462943a | 364 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
2c9ede55 | 365 | char *(*devnode)(struct device *dev, umode_t *mode); |
1da177e4 | 366 | |
d462943a GKH |
367 | void (*class_release)(struct class *class); |
368 | void (*dev_release)(struct device *dev); | |
7c8265f5 | 369 | |
d462943a GKH |
370 | int (*suspend)(struct device *dev, pm_message_t state); |
371 | int (*resume)(struct device *dev); | |
1eede070 | 372 | |
bc451f20 EB |
373 | const struct kobj_ns_type_operations *ns_type; |
374 | const void *(*namespace)(struct device *dev); | |
375 | ||
8150f32b DT |
376 | const struct dev_pm_ops *pm; |
377 | ||
6b6e39a6 | 378 | struct subsys_private *p; |
1da177e4 LT |
379 | }; |
380 | ||
5a3ceb86 TH |
381 | struct class_dev_iter { |
382 | struct klist_iter ki; | |
383 | const struct device_type *type; | |
384 | }; | |
385 | ||
e105b8bf DW |
386 | extern struct kobject *sysfs_dev_block_kobj; |
387 | extern struct kobject *sysfs_dev_char_kobj; | |
d2a3b914 MW |
388 | extern int __must_check __class_register(struct class *class, |
389 | struct lock_class_key *key); | |
d462943a | 390 | extern void class_unregister(struct class *class); |
d2a3b914 MW |
391 | |
392 | /* This is a #define to keep the compiler from merging different | |
393 | * instances of the __key variable */ | |
394 | #define class_register(class) \ | |
395 | ({ \ | |
396 | static struct lock_class_key __key; \ | |
397 | __class_register(class, &__key); \ | |
398 | }) | |
399 | ||
46227094 JD |
400 | struct class_compat; |
401 | struct class_compat *class_compat_register(const char *name); | |
402 | void class_compat_unregister(struct class_compat *cls); | |
403 | int class_compat_create_link(struct class_compat *cls, struct device *dev, | |
404 | struct device *device_link); | |
405 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, | |
406 | struct device *device_link); | |
407 | ||
7cd9c9bb GKH |
408 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
409 | struct class *class, | |
410 | struct device *start, | |
411 | const struct device_type *type); | |
5a3ceb86 TH |
412 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); |
413 | extern void class_dev_iter_exit(struct class_dev_iter *iter); | |
414 | ||
93562b53 GKH |
415 | extern int class_for_each_device(struct class *class, struct device *start, |
416 | void *data, | |
fd04897b | 417 | int (*fn)(struct device *dev, void *data)); |
695794ae | 418 | extern struct device *class_find_device(struct class *class, |
9f3b795a MM |
419 | struct device *start, const void *data, |
420 | int (*match)(struct device *, const void *)); | |
1da177e4 LT |
421 | |
422 | struct class_attribute { | |
d462943a | 423 | struct attribute attr; |
28812fe1 AK |
424 | ssize_t (*show)(struct class *class, struct class_attribute *attr, |
425 | char *buf); | |
426 | ssize_t (*store)(struct class *class, struct class_attribute *attr, | |
427 | const char *buf, size_t count); | |
672d82c1 EB |
428 | const void *(*namespace)(struct class *class, |
429 | const struct class_attribute *attr); | |
1da177e4 LT |
430 | }; |
431 | ||
ced321bf GKH |
432 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
433 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) | |
434 | #define CLASS_ATTR_RW(_name) \ | |
435 | struct class_attribute class_attr_##_name = __ATTR_RW(_name) | |
436 | #define CLASS_ATTR_RO(_name) \ | |
437 | struct class_attribute class_attr_##_name = __ATTR_RO(_name) | |
1da177e4 | 438 | |
d462943a GKH |
439 | extern int __must_check class_create_file(struct class *class, |
440 | const struct class_attribute *attr); | |
441 | extern void class_remove_file(struct class *class, | |
442 | const struct class_attribute *attr); | |
1da177e4 | 443 | |
869dfc87 | 444 | /* Simple class attribute that is just a static string */ |
869dfc87 AK |
445 | struct class_attribute_string { |
446 | struct class_attribute attr; | |
447 | char *str; | |
448 | }; | |
449 | ||
450 | /* Currently read-only only */ | |
451 | #define _CLASS_ATTR_STRING(_name, _mode, _str) \ | |
452 | { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } | |
453 | #define CLASS_ATTR_STRING(_name, _mode, _str) \ | |
454 | struct class_attribute_string class_attr_##_name = \ | |
455 | _CLASS_ATTR_STRING(_name, _mode, _str) | |
456 | ||
457 | extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, | |
458 | char *buf); | |
459 | ||
1da177e4 LT |
460 | struct class_interface { |
461 | struct list_head node; | |
462 | struct class *class; | |
463 | ||
c47ed219 GKH |
464 | int (*add_dev) (struct device *, struct class_interface *); |
465 | void (*remove_dev) (struct device *, struct class_interface *); | |
1da177e4 LT |
466 | }; |
467 | ||
4a7fb636 | 468 | extern int __must_check class_interface_register(struct class_interface *); |
1da177e4 LT |
469 | extern void class_interface_unregister(struct class_interface *); |
470 | ||
d2a3b914 MW |
471 | extern struct class * __must_check __class_create(struct module *owner, |
472 | const char *name, | |
473 | struct lock_class_key *key); | |
e9ba6365 | 474 | extern void class_destroy(struct class *cls); |
e9ba6365 | 475 | |
d2a3b914 MW |
476 | /* This is a #define to keep the compiler from merging different |
477 | * instances of the __key variable */ | |
478 | #define class_create(owner, name) \ | |
479 | ({ \ | |
480 | static struct lock_class_key __key; \ | |
481 | __class_create(owner, name, &__key); \ | |
482 | }) | |
483 | ||
414264f9 KS |
484 | /* |
485 | * The type of device, "struct device" is embedded in. A class | |
486 | * or bus can contain devices of different types | |
487 | * like "partitions" and "disks", "mouse" and "event". | |
488 | * This identifies the device type and carries type-specific | |
489 | * information, equivalent to the kobj_type of a kobject. | |
490 | * If "name" is specified, the uevent will contain it in | |
491 | * the DEVTYPE variable. | |
492 | */ | |
f9f852df | 493 | struct device_type { |
414264f9 | 494 | const char *name; |
a4dbd674 | 495 | const struct attribute_group **groups; |
7eff2e7a | 496 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
3c2670e6 | 497 | char *(*devnode)(struct device *dev, umode_t *mode, |
4e4098a3 | 498 | kuid_t *uid, kgid_t *gid); |
f9f852df | 499 | void (*release)(struct device *dev); |
1eede070 | 500 | |
8150f32b | 501 | const struct dev_pm_ops *pm; |
f9f852df KS |
502 | }; |
503 | ||
a7fd6706 KS |
504 | /* interface for exporting device attributes */ |
505 | struct device_attribute { | |
506 | struct attribute attr; | |
507 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, | |
508 | char *buf); | |
509 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, | |
510 | const char *buf, size_t count); | |
511 | }; | |
512 | ||
ca22e56d KS |
513 | struct dev_ext_attribute { |
514 | struct device_attribute attr; | |
515 | void *var; | |
516 | }; | |
517 | ||
518 | ssize_t device_show_ulong(struct device *dev, struct device_attribute *attr, | |
519 | char *buf); | |
520 | ssize_t device_store_ulong(struct device *dev, struct device_attribute *attr, | |
521 | const char *buf, size_t count); | |
522 | ssize_t device_show_int(struct device *dev, struct device_attribute *attr, | |
523 | char *buf); | |
524 | ssize_t device_store_int(struct device *dev, struct device_attribute *attr, | |
525 | const char *buf, size_t count); | |
91872392 BP |
526 | ssize_t device_show_bool(struct device *dev, struct device_attribute *attr, |
527 | char *buf); | |
528 | ssize_t device_store_bool(struct device *dev, struct device_attribute *attr, | |
529 | const char *buf, size_t count); | |
a7fd6706 | 530 | |
d462943a | 531 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
ca22e56d | 532 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) |
ced321bf GKH |
533 | #define DEVICE_ATTR_RW(_name) \ |
534 | struct device_attribute dev_attr_##_name = __ATTR_RW(_name) | |
535 | #define DEVICE_ATTR_RO(_name) \ | |
536 | struct device_attribute dev_attr_##_name = __ATTR_RO(_name) | |
ca22e56d KS |
537 | #define DEVICE_ULONG_ATTR(_name, _mode, _var) \ |
538 | struct dev_ext_attribute dev_attr_##_name = \ | |
539 | { __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) } | |
540 | #define DEVICE_INT_ATTR(_name, _mode, _var) \ | |
541 | struct dev_ext_attribute dev_attr_##_name = \ | |
94758185 | 542 | { __ATTR(_name, _mode, device_show_int, device_store_int), &(_var) } |
91872392 BP |
543 | #define DEVICE_BOOL_ATTR(_name, _mode, _var) \ |
544 | struct dev_ext_attribute dev_attr_##_name = \ | |
545 | { __ATTR(_name, _mode, device_show_bool, device_store_bool), &(_var) } | |
356c05d5 AS |
546 | #define DEVICE_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \ |
547 | struct device_attribute dev_attr_##_name = \ | |
548 | __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) | |
a7fd6706 | 549 | |
b9d4e714 GKH |
550 | extern int device_create_file(struct device *device, |
551 | const struct device_attribute *entry); | |
d462943a | 552 | extern void device_remove_file(struct device *dev, |
26579ab7 | 553 | const struct device_attribute *attr); |
2589f188 | 554 | extern int __must_check device_create_bin_file(struct device *dev, |
66ecb92b | 555 | const struct bin_attribute *attr); |
2589f188 | 556 | extern void device_remove_bin_file(struct device *dev, |
66ecb92b | 557 | const struct bin_attribute *attr); |
523ded71 | 558 | extern int device_schedule_callback_owner(struct device *dev, |
d462943a | 559 | void (*func)(struct device *dev), struct module *owner); |
523ded71 AS |
560 | |
561 | /* This is a macro to avoid include problems with THIS_MODULE */ | |
562 | #define device_schedule_callback(dev, func) \ | |
563 | device_schedule_callback_owner(dev, func, THIS_MODULE) | |
9ac7849e TH |
564 | |
565 | /* device resource management */ | |
566 | typedef void (*dr_release_t)(struct device *dev, void *res); | |
567 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); | |
568 | ||
569 | #ifdef CONFIG_DEBUG_DEVRES | |
d462943a | 570 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
9ac7849e TH |
571 | const char *name); |
572 | #define devres_alloc(release, size, gfp) \ | |
573 | __devres_alloc(release, size, gfp, #release) | |
574 | #else | |
d462943a | 575 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
9ac7849e | 576 | #endif |
bddb1b90 ML |
577 | extern void devres_for_each_res(struct device *dev, dr_release_t release, |
578 | dr_match_t match, void *match_data, | |
579 | void (*fn)(struct device *, void *, void *), | |
580 | void *data); | |
9ac7849e TH |
581 | extern void devres_free(void *res); |
582 | extern void devres_add(struct device *dev, void *res); | |
d462943a | 583 | extern void *devres_find(struct device *dev, dr_release_t release, |
9ac7849e | 584 | dr_match_t match, void *match_data); |
d462943a GKH |
585 | extern void *devres_get(struct device *dev, void *new_res, |
586 | dr_match_t match, void *match_data); | |
587 | extern void *devres_remove(struct device *dev, dr_release_t release, | |
588 | dr_match_t match, void *match_data); | |
9ac7849e TH |
589 | extern int devres_destroy(struct device *dev, dr_release_t release, |
590 | dr_match_t match, void *match_data); | |
d926d0e4 MB |
591 | extern int devres_release(struct device *dev, dr_release_t release, |
592 | dr_match_t match, void *match_data); | |
9ac7849e TH |
593 | |
594 | /* devres group */ | |
595 | extern void * __must_check devres_open_group(struct device *dev, void *id, | |
596 | gfp_t gfp); | |
597 | extern void devres_close_group(struct device *dev, void *id); | |
598 | extern void devres_remove_group(struct device *dev, void *id); | |
599 | extern int devres_release_group(struct device *dev, void *id); | |
600 | ||
601 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ | |
602 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); | |
603 | extern void devm_kfree(struct device *dev, void *p); | |
604 | ||
75096579 | 605 | void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res); |
72f8c0bf WS |
606 | void __iomem *devm_request_and_ioremap(struct device *dev, |
607 | struct resource *res); | |
608 | ||
d6b0c580 DT |
609 | /* allows to add/remove a custom action to devres stack */ |
610 | int devm_add_action(struct device *dev, void (*action)(void *), void *data); | |
611 | void devm_remove_action(struct device *dev, void (*action)(void *), void *data); | |
612 | ||
6b7b6510 FT |
613 | struct device_dma_parameters { |
614 | /* | |
615 | * a low level driver may set these to teach IOMMU code about | |
616 | * sg limitations. | |
617 | */ | |
618 | unsigned int max_segment_size; | |
619 | unsigned long segment_boundary_mask; | |
620 | }; | |
621 | ||
95f8a082 RW |
622 | struct acpi_dev_node { |
623 | #ifdef CONFIG_ACPI | |
624 | void *handle; | |
625 | #endif | |
626 | }; | |
627 | ||
880ffb5c WG |
628 | /** |
629 | * struct device - The basic device structure | |
630 | * @parent: The device's "parent" device, the device to which it is attached. | |
631 | * In most cases, a parent device is some sort of bus or host | |
632 | * controller. If parent is NULL, the device, is a top-level device, | |
633 | * which is not usually what you want. | |
634 | * @p: Holds the private data of the driver core portions of the device. | |
635 | * See the comment of the struct device_private for detail. | |
636 | * @kobj: A top-level, abstract class from which other classes are derived. | |
637 | * @init_name: Initial name of the device. | |
638 | * @type: The type of device. | |
639 | * This identifies the device type and carries type-specific | |
640 | * information. | |
641 | * @mutex: Mutex to synchronize calls to its driver. | |
642 | * @bus: Type of bus device is on. | |
643 | * @driver: Which driver has allocated this | |
644 | * @platform_data: Platform data specific to the device. | |
645 | * Example: For devices on custom boards, as typical of embedded | |
646 | * and SOC based hardware, Linux often uses platform_data to point | |
647 | * to board-specific structures describing devices and how they | |
648 | * are wired. That can include what ports are available, chip | |
649 | * variants, which GPIO pins act in what additional roles, and so | |
650 | * on. This shrinks the "Board Support Packages" (BSPs) and | |
651 | * minimizes board-specific #ifdefs in drivers. | |
652 | * @power: For device power management. | |
653 | * See Documentation/power/devices.txt for details. | |
564b905a | 654 | * @pm_domain: Provide callbacks that are executed during system suspend, |
880ffb5c WG |
655 | * hibernation, system resume and during runtime PM transitions |
656 | * along with subsystem-level and driver-level callbacks. | |
ab78029e LW |
657 | * @pins: For device pin management. |
658 | * See Documentation/pinctrl.txt for details. | |
880ffb5c WG |
659 | * @numa_node: NUMA node this device is close to. |
660 | * @dma_mask: Dma mask (if dma'ble device). | |
661 | * @coherent_dma_mask: Like dma_mask, but for alloc_coherent mapping as not all | |
662 | * hardware supports 64-bit addresses for consistent allocations | |
663 | * such descriptors. | |
664 | * @dma_parms: A low level driver may set these to teach IOMMU code about | |
665 | * segment limitations. | |
666 | * @dma_pools: Dma pools (if dma'ble device). | |
667 | * @dma_mem: Internal for coherent mem override. | |
bfd63cd2 | 668 | * @cma_area: Contiguous memory area for dma allocations |
880ffb5c WG |
669 | * @archdata: For arch-specific additions. |
670 | * @of_node: Associated device tree node. | |
95f8a082 | 671 | * @acpi_node: Associated ACPI device node. |
880ffb5c | 672 | * @devt: For creating the sysfs "dev". |
2eda013f | 673 | * @id: device instance |
880ffb5c WG |
674 | * @devres_lock: Spinlock to protect the resource of the device. |
675 | * @devres_head: The resources list of the device. | |
676 | * @knode_class: The node used to add the device to the class list. | |
677 | * @class: The class of the device. | |
678 | * @groups: Optional attribute groups. | |
679 | * @release: Callback to free the device after all references have | |
680 | * gone away. This should be set by the allocator of the | |
681 | * device (i.e. the bus driver that discovered the device). | |
bfd63cd2 | 682 | * @iommu_group: IOMMU group the device belongs to. |
880ffb5c | 683 | * |
4f3549d7 RW |
684 | * @offline_disabled: If set, the device is permanently online. |
685 | * @offline: Set after successful invocation of bus type's .offline(). | |
880ffb5c WG |
686 | * |
687 | * At the lowest level, every device in a Linux system is represented by an | |
688 | * instance of struct device. The device structure contains the information | |
689 | * that the device model core needs to model the system. Most subsystems, | |
690 | * however, track additional information about the devices they host. As a | |
691 | * result, it is rare for devices to be represented by bare device structures; | |
692 | * instead, that structure, like kobject structures, is usually embedded within | |
693 | * a higher-level representation of the device. | |
694 | */ | |
1da177e4 | 695 | struct device { |
49a4ec18 | 696 | struct device *parent; |
1da177e4 | 697 | |
fb069a5d GKH |
698 | struct device_private *p; |
699 | ||
1da177e4 | 700 | struct kobject kobj; |
c906a48a | 701 | const char *init_name; /* initial name of the device */ |
aed65af1 | 702 | const struct device_type *type; |
1da177e4 | 703 | |
3142788b | 704 | struct mutex mutex; /* mutex to synchronize calls to |
af70316a PM |
705 | * its driver. |
706 | */ | |
707 | ||
d462943a | 708 | struct bus_type *bus; /* type of bus device is on */ |
1da177e4 LT |
709 | struct device_driver *driver; /* which driver has allocated this |
710 | device */ | |
e67c8562 GKH |
711 | void *platform_data; /* Platform specific data, device |
712 | core doesn't touch it */ | |
1da177e4 | 713 | struct dev_pm_info power; |
564b905a | 714 | struct dev_pm_domain *pm_domain; |
1da177e4 | 715 | |
ab78029e LW |
716 | #ifdef CONFIG_PINCTRL |
717 | struct dev_pin_info *pins; | |
718 | #endif | |
719 | ||
87348136 CH |
720 | #ifdef CONFIG_NUMA |
721 | int numa_node; /* NUMA node this device is close to */ | |
722 | #endif | |
1da177e4 LT |
723 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
724 | u64 coherent_dma_mask;/* Like dma_mask, but for | |
725 | alloc_coherent mappings as | |
726 | not all hardware supports | |
727 | 64 bit addresses for consistent | |
728 | allocations such descriptors. */ | |
729 | ||
6b7b6510 FT |
730 | struct device_dma_parameters *dma_parms; |
731 | ||
1da177e4 LT |
732 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
733 | ||
734 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem | |
735 | override */ | |
c64be2bb MS |
736 | #ifdef CONFIG_CMA |
737 | struct cma *cma_area; /* contiguous memory area for dma | |
738 | allocations */ | |
739 | #endif | |
c6dbaef2 BH |
740 | /* arch specific additions */ |
741 | struct dev_archdata archdata; | |
c9e358df GL |
742 | |
743 | struct device_node *of_node; /* associated device tree node */ | |
95f8a082 | 744 | struct acpi_dev_node acpi_node; /* associated ACPI device node */ |
1da177e4 | 745 | |
929d2fa5 | 746 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
ca22e56d | 747 | u32 id; /* device instance */ |
929d2fa5 | 748 | |
9ac7849e TH |
749 | spinlock_t devres_lock; |
750 | struct list_head devres_head; | |
751 | ||
5a3ceb86 | 752 | struct klist_node knode_class; |
b7a3e813 | 753 | struct class *class; |
a4dbd674 | 754 | const struct attribute_group **groups; /* optional groups */ |
23681e47 | 755 | |
d462943a | 756 | void (*release)(struct device *dev); |
74416e1e | 757 | struct iommu_group *iommu_group; |
4f3549d7 RW |
758 | |
759 | bool offline_disabled:1; | |
760 | bool offline:1; | |
1da177e4 LT |
761 | }; |
762 | ||
a4232963 LPC |
763 | static inline struct device *kobj_to_dev(struct kobject *kobj) |
764 | { | |
765 | return container_of(kobj, struct device, kobj); | |
766 | } | |
767 | ||
95f8a082 RW |
768 | #ifdef CONFIG_ACPI |
769 | #define ACPI_HANDLE(dev) ((dev)->acpi_node.handle) | |
770 | #define ACPI_HANDLE_SET(dev, _handle_) (dev)->acpi_node.handle = (_handle_) | |
771 | #else | |
772 | #define ACPI_HANDLE(dev) (NULL) | |
773 | #define ACPI_HANDLE_SET(dev, _handle_) do { } while (0) | |
774 | #endif | |
775 | ||
9a3df1f7 AS |
776 | /* Get the wakeup routines, which depend on struct device */ |
777 | #include <linux/pm_wakeup.h> | |
778 | ||
bf9ca69f | 779 | static inline const char *dev_name(const struct device *dev) |
06916639 | 780 | { |
a636ee7f PM |
781 | /* Use the init name until the kobject becomes available */ |
782 | if (dev->init_name) | |
783 | return dev->init_name; | |
784 | ||
1fa5ae85 | 785 | return kobject_name(&dev->kobj); |
06916639 KS |
786 | } |
787 | ||
b9075fa9 JP |
788 | extern __printf(2, 3) |
789 | int dev_set_name(struct device *dev, const char *name, ...); | |
413c239f | 790 | |
87348136 CH |
791 | #ifdef CONFIG_NUMA |
792 | static inline int dev_to_node(struct device *dev) | |
793 | { | |
794 | return dev->numa_node; | |
795 | } | |
796 | static inline void set_dev_node(struct device *dev, int node) | |
797 | { | |
798 | dev->numa_node = node; | |
799 | } | |
800 | #else | |
801 | static inline int dev_to_node(struct device *dev) | |
802 | { | |
803 | return -1; | |
804 | } | |
805 | static inline void set_dev_node(struct device *dev, int node) | |
806 | { | |
807 | } | |
808 | #endif | |
809 | ||
5c095a0e RW |
810 | static inline struct pm_subsys_data *dev_to_psd(struct device *dev) |
811 | { | |
812 | return dev ? dev->power.subsys_data : NULL; | |
813 | } | |
814 | ||
f67f129e ML |
815 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) |
816 | { | |
817 | return dev->kobj.uevent_suppress; | |
818 | } | |
819 | ||
820 | static inline void dev_set_uevent_suppress(struct device *dev, int val) | |
821 | { | |
822 | dev->kobj.uevent_suppress = val; | |
823 | } | |
824 | ||
d305ef5d DR |
825 | static inline int device_is_registered(struct device *dev) |
826 | { | |
3f62e570 | 827 | return dev->kobj.state_in_sysfs; |
d305ef5d DR |
828 | } |
829 | ||
5af84b82 RW |
830 | static inline void device_enable_async_suspend(struct device *dev) |
831 | { | |
f76b168b | 832 | if (!dev->power.is_prepared) |
5af84b82 RW |
833 | dev->power.async_suspend = true; |
834 | } | |
835 | ||
5a2eb858 RW |
836 | static inline void device_disable_async_suspend(struct device *dev) |
837 | { | |
f76b168b | 838 | if (!dev->power.is_prepared) |
5a2eb858 RW |
839 | dev->power.async_suspend = false; |
840 | } | |
841 | ||
842 | static inline bool device_async_suspend_enabled(struct device *dev) | |
843 | { | |
844 | return !!dev->power.async_suspend; | |
845 | } | |
846 | ||
8b258cc8 RW |
847 | static inline void pm_suspend_ignore_children(struct device *dev, bool enable) |
848 | { | |
849 | dev->power.ignore_children = enable; | |
850 | } | |
851 | ||
feb70af0 RW |
852 | static inline void dev_pm_syscore_device(struct device *dev, bool val) |
853 | { | |
854 | #ifdef CONFIG_PM_SLEEP | |
855 | dev->power.syscore = val; | |
856 | #endif | |
857 | } | |
858 | ||
8e9394ce GKH |
859 | static inline void device_lock(struct device *dev) |
860 | { | |
3142788b | 861 | mutex_lock(&dev->mutex); |
8e9394ce GKH |
862 | } |
863 | ||
864 | static inline int device_trylock(struct device *dev) | |
865 | { | |
3142788b | 866 | return mutex_trylock(&dev->mutex); |
8e9394ce GKH |
867 | } |
868 | ||
869 | static inline void device_unlock(struct device *dev) | |
870 | { | |
3142788b | 871 | mutex_unlock(&dev->mutex); |
8e9394ce GKH |
872 | } |
873 | ||
1f21782e AB |
874 | void driver_init(void); |
875 | ||
1da177e4 LT |
876 | /* |
877 | * High level routines for use by the bus drivers | |
878 | */ | |
d462943a GKH |
879 | extern int __must_check device_register(struct device *dev); |
880 | extern void device_unregister(struct device *dev); | |
881 | extern void device_initialize(struct device *dev); | |
882 | extern int __must_check device_add(struct device *dev); | |
883 | extern void device_del(struct device *dev); | |
884 | extern int device_for_each_child(struct device *dev, void *data, | |
885 | int (*fn)(struct device *dev, void *data)); | |
886 | extern struct device *device_find_child(struct device *dev, void *data, | |
887 | int (*match)(struct device *dev, void *data)); | |
6937e8f8 | 888 | extern int device_rename(struct device *dev, const char *new_name); |
ffa6a705 CH |
889 | extern int device_move(struct device *dev, struct device *new_parent, |
890 | enum dpm_order dpm_order); | |
e454cea2 | 891 | extern const char *device_get_devnode(struct device *dev, |
4e4098a3 | 892 | umode_t *mode, kuid_t *uid, kgid_t *gid, |
3c2670e6 | 893 | const char **tmp); |
b4028437 | 894 | extern void *dev_get_drvdata(const struct device *dev); |
c8705082 | 895 | extern int dev_set_drvdata(struct device *dev, void *data); |
1da177e4 | 896 | |
4f3549d7 RW |
897 | static inline bool device_supports_offline(struct device *dev) |
898 | { | |
899 | return dev->bus && dev->bus->offline && dev->bus->online; | |
900 | } | |
901 | ||
902 | extern void lock_device_hotplug(void); | |
903 | extern void unlock_device_hotplug(void); | |
904 | extern int device_offline(struct device *dev); | |
905 | extern int device_online(struct device *dev); | |
0aa0dc41 MM |
906 | /* |
907 | * Root device objects for grouping under /sys/devices | |
908 | */ | |
909 | extern struct device *__root_device_register(const char *name, | |
910 | struct module *owner); | |
eb5589a8 PG |
911 | |
912 | /* | |
913 | * This is a macro to avoid include problems with THIS_MODULE, | |
914 | * just as per what is done for device_schedule_callback() above. | |
915 | */ | |
916 | #define root_device_register(name) \ | |
917 | __root_device_register(name, THIS_MODULE) | |
918 | ||
0aa0dc41 MM |
919 | extern void root_device_unregister(struct device *root); |
920 | ||
a5b8b1ad MB |
921 | static inline void *dev_get_platdata(const struct device *dev) |
922 | { | |
923 | return dev->platform_data; | |
924 | } | |
925 | ||
1da177e4 LT |
926 | /* |
927 | * Manual binding of a device to driver. See drivers/base/bus.c | |
928 | * for information on use. | |
929 | */ | |
f86db396 | 930 | extern int __must_check device_bind_driver(struct device *dev); |
d462943a GKH |
931 | extern void device_release_driver(struct device *dev); |
932 | extern int __must_check device_attach(struct device *dev); | |
f86db396 AM |
933 | extern int __must_check driver_attach(struct device_driver *drv); |
934 | extern int __must_check device_reprobe(struct device *dev); | |
1da177e4 | 935 | |
23681e47 GKH |
936 | /* |
937 | * Easy functions for dynamically creating devices on the fly | |
938 | */ | |
8882b394 GKH |
939 | extern struct device *device_create_vargs(struct class *cls, |
940 | struct device *parent, | |
941 | dev_t devt, | |
942 | void *drvdata, | |
943 | const char *fmt, | |
944 | va_list vargs); | |
b9075fa9 JP |
945 | extern __printf(5, 6) |
946 | struct device *device_create(struct class *cls, struct device *parent, | |
947 | dev_t devt, void *drvdata, | |
948 | const char *fmt, ...); | |
39ef3112 GR |
949 | extern __printf(6, 7) |
950 | struct device *device_create_with_groups(struct class *cls, | |
951 | struct device *parent, dev_t devt, void *drvdata, | |
952 | const struct attribute_group **groups, | |
953 | const char *fmt, ...); | |
23681e47 | 954 | extern void device_destroy(struct class *cls, dev_t devt); |
1da177e4 | 955 | |
1da177e4 LT |
956 | /* |
957 | * Platform "fixup" functions - allow the platform to have their say | |
958 | * about devices and actions that the general device layer doesn't | |
959 | * know about. | |
960 | */ | |
961 | /* Notify platform of device discovery */ | |
d462943a | 962 | extern int (*platform_notify)(struct device *dev); |
1da177e4 | 963 | |
d462943a | 964 | extern int (*platform_notify_remove)(struct device *dev); |
1da177e4 LT |
965 | |
966 | ||
880ffb5c | 967 | /* |
1da177e4 LT |
968 | * get_device - atomically increment the reference count for the device. |
969 | * | |
970 | */ | |
d462943a GKH |
971 | extern struct device *get_device(struct device *dev); |
972 | extern void put_device(struct device *dev); | |
1da177e4 | 973 | |
2b2af54a KS |
974 | #ifdef CONFIG_DEVTMPFS |
975 | extern int devtmpfs_create_node(struct device *dev); | |
976 | extern int devtmpfs_delete_node(struct device *dev); | |
073120cc | 977 | extern int devtmpfs_mount(const char *mntdir); |
2b2af54a KS |
978 | #else |
979 | static inline int devtmpfs_create_node(struct device *dev) { return 0; } | |
980 | static inline int devtmpfs_delete_node(struct device *dev) { return 0; } | |
981 | static inline int devtmpfs_mount(const char *mountpoint) { return 0; } | |
982 | #endif | |
983 | ||
116f232b | 984 | /* drivers/base/power/shutdown.c */ |
1da177e4 LT |
985 | extern void device_shutdown(void); |
986 | ||
1da177e4 | 987 | /* debugging and troubleshooting/diagnostic helpers. */ |
bf9ca69f | 988 | extern const char *dev_driver_string(const struct device *dev); |
99bcf217 JP |
989 | |
990 | ||
991 | #ifdef CONFIG_PRINTK | |
992 | ||
0a18b050 JP |
993 | extern __printf(3, 0) |
994 | int dev_vprintk_emit(int level, const struct device *dev, | |
995 | const char *fmt, va_list args); | |
05e4e5b8 JP |
996 | extern __printf(3, 4) |
997 | int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...); | |
798efc60 | 998 | |
b9075fa9 JP |
999 | extern __printf(3, 4) |
1000 | int dev_printk(const char *level, const struct device *dev, | |
798efc60 | 1001 | const char *fmt, ...); |
b9075fa9 JP |
1002 | extern __printf(2, 3) |
1003 | int dev_emerg(const struct device *dev, const char *fmt, ...); | |
1004 | extern __printf(2, 3) | |
1005 | int dev_alert(const struct device *dev, const char *fmt, ...); | |
1006 | extern __printf(2, 3) | |
1007 | int dev_crit(const struct device *dev, const char *fmt, ...); | |
1008 | extern __printf(2, 3) | |
1009 | int dev_err(const struct device *dev, const char *fmt, ...); | |
1010 | extern __printf(2, 3) | |
1011 | int dev_warn(const struct device *dev, const char *fmt, ...); | |
1012 | extern __printf(2, 3) | |
1013 | int dev_notice(const struct device *dev, const char *fmt, ...); | |
1014 | extern __printf(2, 3) | |
1015 | int _dev_info(const struct device *dev, const char *fmt, ...); | |
99bcf217 JP |
1016 | |
1017 | #else | |
1018 | ||
0a18b050 JP |
1019 | static inline __printf(3, 0) |
1020 | int dev_vprintk_emit(int level, const struct device *dev, | |
1021 | const char *fmt, va_list args) | |
05e4e5b8 JP |
1022 | { return 0; } |
1023 | static inline __printf(3, 4) | |
1024 | int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...) | |
1025 | { return 0; } | |
1026 | ||
cbc46635 JP |
1027 | static inline int __dev_printk(const char *level, const struct device *dev, |
1028 | struct va_format *vaf) | |
b9075fa9 JP |
1029 | { return 0; } |
1030 | static inline __printf(3, 4) | |
1031 | int dev_printk(const char *level, const struct device *dev, | |
1032 | const char *fmt, ...) | |
1033 | { return 0; } | |
1034 | ||
1035 | static inline __printf(2, 3) | |
1036 | int dev_emerg(const struct device *dev, const char *fmt, ...) | |
1037 | { return 0; } | |
1038 | static inline __printf(2, 3) | |
1039 | int dev_crit(const struct device *dev, const char *fmt, ...) | |
1040 | { return 0; } | |
1041 | static inline __printf(2, 3) | |
1042 | int dev_alert(const struct device *dev, const char *fmt, ...) | |
1043 | { return 0; } | |
1044 | static inline __printf(2, 3) | |
1045 | int dev_err(const struct device *dev, const char *fmt, ...) | |
1046 | { return 0; } | |
1047 | static inline __printf(2, 3) | |
1048 | int dev_warn(const struct device *dev, const char *fmt, ...) | |
1049 | { return 0; } | |
1050 | static inline __printf(2, 3) | |
1051 | int dev_notice(const struct device *dev, const char *fmt, ...) | |
1052 | { return 0; } | |
1053 | static inline __printf(2, 3) | |
1054 | int _dev_info(const struct device *dev, const char *fmt, ...) | |
1055 | { return 0; } | |
99bcf217 JP |
1056 | |
1057 | #endif | |
1058 | ||
6f586e66 HD |
1059 | /* |
1060 | * Stupid hackaround for existing uses of non-printk uses dev_info | |
1061 | * | |
1062 | * Note that the definition of dev_info below is actually _dev_info | |
1063 | * and a macro is used to avoid redefining dev_info | |
1064 | */ | |
1065 | ||
1066 | #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg) | |
1067 | ||
1068 | #if defined(CONFIG_DYNAMIC_DEBUG) | |
1069 | #define dev_dbg(dev, format, ...) \ | |
1070 | do { \ | |
1071 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ | |
1072 | } while (0) | |
1073 | #elif defined(DEBUG) | |
1074 | #define dev_dbg(dev, format, arg...) \ | |
1075 | dev_printk(KERN_DEBUG, dev, format, ##arg) | |
1076 | #else | |
1077 | #define dev_dbg(dev, format, arg...) \ | |
1078 | ({ \ | |
1079 | if (0) \ | |
1080 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
1081 | 0; \ | |
1082 | }) | |
1083 | #endif | |
1084 | ||
6ca04593 HD |
1085 | #define dev_level_ratelimited(dev_level, dev, fmt, ...) \ |
1086 | do { \ | |
1087 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
1088 | DEFAULT_RATELIMIT_INTERVAL, \ | |
1089 | DEFAULT_RATELIMIT_BURST); \ | |
1090 | if (__ratelimit(&_rs)) \ | |
1091 | dev_level(dev, fmt, ##__VA_ARGS__); \ | |
1092 | } while (0) | |
1093 | ||
1094 | #define dev_emerg_ratelimited(dev, fmt, ...) \ | |
1095 | dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__) | |
1096 | #define dev_alert_ratelimited(dev, fmt, ...) \ | |
1097 | dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__) | |
1098 | #define dev_crit_ratelimited(dev, fmt, ...) \ | |
1099 | dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__) | |
1100 | #define dev_err_ratelimited(dev, fmt, ...) \ | |
1101 | dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__) | |
1102 | #define dev_warn_ratelimited(dev, fmt, ...) \ | |
1103 | dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__) | |
1104 | #define dev_notice_ratelimited(dev, fmt, ...) \ | |
1105 | dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__) | |
1106 | #define dev_info_ratelimited(dev, fmt, ...) \ | |
1107 | dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__) | |
6f586e66 | 1108 | #if defined(CONFIG_DYNAMIC_DEBUG) || defined(DEBUG) |
6ca04593 | 1109 | #define dev_dbg_ratelimited(dev, fmt, ...) \ |
6f586e66 HD |
1110 | do { \ |
1111 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
1112 | DEFAULT_RATELIMIT_INTERVAL, \ | |
1113 | DEFAULT_RATELIMIT_BURST); \ | |
1114 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
1115 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \ | |
1116 | __ratelimit(&_rs)) \ | |
1117 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ | |
1118 | ##__VA_ARGS__); \ | |
99bcf217 | 1119 | } while (0) |
1da177e4 | 1120 | #else |
6f586e66 HD |
1121 | #define dev_dbg_ratelimited(dev, fmt, ...) \ |
1122 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | |
1da177e4 LT |
1123 | #endif |
1124 | ||
aebdc3b4 DB |
1125 | #ifdef VERBOSE_DEBUG |
1126 | #define dev_vdbg dev_dbg | |
1127 | #else | |
99bcf217 JP |
1128 | #define dev_vdbg(dev, format, arg...) \ |
1129 | ({ \ | |
1130 | if (0) \ | |
1131 | dev_printk(KERN_DEBUG, dev, format, ##arg); \ | |
1132 | 0; \ | |
1133 | }) | |
aebdc3b4 DB |
1134 | #endif |
1135 | ||
e6139662 | 1136 | /* |
bcdd323b | 1137 | * dev_WARN*() acts like dev_printk(), but with the key difference |
e6139662 AV |
1138 | * of using a WARN/WARN_ON to get the message out, including the |
1139 | * file/line information and a backtrace. | |
1140 | */ | |
1141 | #define dev_WARN(dev, format, arg...) \ | |
1142 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); | |
1143 | ||
bcdd323b FB |
1144 | #define dev_WARN_ONCE(dev, condition, format, arg...) \ |
1145 | WARN_ONCE(condition, "Device %s\n" format, \ | |
1146 | dev_driver_string(dev), ## arg) | |
1147 | ||
1da177e4 LT |
1148 | /* Create alias, so I can be autoloaded. */ |
1149 | #define MODULE_ALIAS_CHARDEV(major,minor) \ | |
1150 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) | |
1151 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ | |
1152 | MODULE_ALIAS("char-major-" __stringify(major) "-*") | |
e52eec13 AK |
1153 | |
1154 | #ifdef CONFIG_SYSFS_DEPRECATED | |
1155 | extern long sysfs_deprecated; | |
1156 | #else | |
1157 | #define sysfs_deprecated 0 | |
1158 | #endif | |
1159 | ||
907d0ed1 LPC |
1160 | /** |
1161 | * module_driver() - Helper macro for drivers that don't do anything | |
1162 | * special in module init/exit. This eliminates a lot of boilerplate. | |
1163 | * Each module may only use this macro once, and calling it replaces | |
1164 | * module_init() and module_exit(). | |
1165 | * | |
2eda013f RD |
1166 | * @__driver: driver name |
1167 | * @__register: register function for this driver type | |
1168 | * @__unregister: unregister function for this driver type | |
cd494618 | 1169 | * @...: Additional arguments to be passed to __register and __unregister. |
2eda013f | 1170 | * |
907d0ed1 LPC |
1171 | * Use this macro to construct bus specific macros for registering |
1172 | * drivers, and do not use it on its own. | |
1173 | */ | |
cd494618 | 1174 | #define module_driver(__driver, __register, __unregister, ...) \ |
907d0ed1 LPC |
1175 | static int __init __driver##_init(void) \ |
1176 | { \ | |
cd494618 | 1177 | return __register(&(__driver) , ##__VA_ARGS__); \ |
907d0ed1 LPC |
1178 | } \ |
1179 | module_init(__driver##_init); \ | |
1180 | static void __exit __driver##_exit(void) \ | |
1181 | { \ | |
cd494618 | 1182 | __unregister(&(__driver) , ##__VA_ARGS__); \ |
907d0ed1 LPC |
1183 | } \ |
1184 | module_exit(__driver##_exit); | |
1185 | ||
1da177e4 | 1186 | #endif /* _DEVICE_H_ */ |