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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/ioport.h>
15#include <linux/kobject.h>
mochel@digitalimplant.org465c7a32005-03-21 11:49:14 -080016#include <linux/klist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/list.h>
Andrew Morton4a7fb632006-08-14 22:43:17 -070018#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/types.h>
20#include <linux/module.h>
21#include <linux/pm.h>
22#include <asm/semaphore.h>
23#include <asm/atomic.h>
24
25#define DEVICE_NAME_SIZE 50
26#define DEVICE_NAME_HALF __stringify(20) /* Less than half to accommodate slop */
27#define DEVICE_ID_SIZE 32
28#define BUS_ID_SIZE KOBJ_NAME_LEN
29
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031struct device;
32struct device_driver;
33struct class;
34struct class_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36struct bus_type {
Dmitry Torokhov8d790d72005-04-26 02:34:05 -050037 const char * name;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39 struct subsystem subsys;
40 struct kset drivers;
41 struct kset devices;
mochel@digitalimplant.org465c7a32005-03-21 11:49:14 -080042 struct klist klist_devices;
mochel@digitalimplant.org38fdac32005-03-21 12:00:18 -080043 struct klist klist_drivers;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45 struct bus_attribute * bus_attrs;
46 struct device_attribute * dev_attrs;
47 struct driver_attribute * drv_attrs;
48
49 int (*match)(struct device * dev, struct device_driver * drv);
Kay Sievers312c0042005-11-16 09:00:00 +010050 int (*uevent)(struct device *dev, char **envp,
51 int num_envp, char *buffer, int buffer_size);
Russell King594c8282006-01-05 14:29:51 +000052 int (*probe)(struct device * dev);
53 int (*remove)(struct device * dev);
54 void (*shutdown)(struct device * dev);
Linus Torvalds7c8265f2006-06-24 14:50:29 -070055
Linus Torvalds7c8265f2006-06-24 14:50:29 -070056 int (*suspend)(struct device * dev, pm_message_t state);
57 int (*suspend_late)(struct device * dev, pm_message_t state);
58 int (*resume_early)(struct device * dev);
59 int (*resume)(struct device * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060};
61
Andrew Morton4a7fb632006-08-14 22:43:17 -070062extern int __must_check bus_register(struct bus_type * bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063extern void bus_unregister(struct bus_type * bus);
64
Andrew Mortonf86db392006-08-14 22:43:20 -070065extern int __must_check bus_rescan_devices(struct bus_type * bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Linus Torvalds1da177e2005-04-16 15:20:36 -070067/* iterator helpers for buses */
68
69int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data,
70 int (*fn)(struct device *, void *));
Cornelia Huck0edb5862005-06-22 16:59:51 +020071struct device * bus_find_device(struct bus_type *bus, struct device *start,
72 void *data, int (*match)(struct device *, void *));
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Andrew Morton4a7fb632006-08-14 22:43:17 -070074int __must_check bus_for_each_drv(struct bus_type *bus,
75 struct device_driver *start, void *data,
76 int (*fn)(struct device_driver *, void *));
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78/* driverfs interface for exporting bus attributes */
79
80struct bus_attribute {
81 struct attribute attr;
82 ssize_t (*show)(struct bus_type *, char * buf);
83 ssize_t (*store)(struct bus_type *, const char * buf, size_t count);
84};
85
86#define BUS_ATTR(_name,_mode,_show,_store) \
87struct bus_attribute bus_attr_##_name = __ATTR(_name,_mode,_show,_store)
88
Andrew Morton4a7fb632006-08-14 22:43:17 -070089extern int __must_check bus_create_file(struct bus_type *,
90 struct bus_attribute *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
92
93struct device_driver {
Dmitry Torokhov8d790d72005-04-26 02:34:05 -050094 const char * name;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 struct bus_type * bus;
96
97 struct completion unloaded;
98 struct kobject kobj;
mochel@digitalimplant.org94e7b1c52005-03-21 12:25:36 -080099 struct klist klist_devices;
mochel@digitalimplant.org38fdac32005-03-21 12:00:18 -0800100 struct klist_node knode_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Dmitry Torokhov8d790d72005-04-26 02:34:05 -0500102 struct module * owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 int (*probe) (struct device * dev);
Dmitry Torokhov8d790d72005-04-26 02:34:05 -0500105 int (*remove) (struct device * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 void (*shutdown) (struct device * dev);
Russell King9480e302005-10-28 09:52:56 -0700107 int (*suspend) (struct device * dev, pm_message_t state);
108 int (*resume) (struct device * dev);
Greg Kroah-Hartmand7792492006-07-18 10:59:59 -0700109
110 unsigned int multithread_probe:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111};
112
113
Andrew Morton4a7fb632006-08-14 22:43:17 -0700114extern int __must_check driver_register(struct device_driver * drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115extern void driver_unregister(struct device_driver * drv);
116
117extern struct device_driver * get_driver(struct device_driver * drv);
118extern void put_driver(struct device_driver * drv);
119extern struct device_driver *driver_find(const char *name, struct bus_type *bus);
Greg Kroah-Hartmand7792492006-07-18 10:59:59 -0700120extern int driver_probe_done(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122/* driverfs interface for exporting driver attributes */
123
124struct driver_attribute {
125 struct attribute attr;
126 ssize_t (*show)(struct device_driver *, char * buf);
127 ssize_t (*store)(struct device_driver *, const char * buf, size_t count);
128};
129
130#define DRIVER_ATTR(_name,_mode,_show,_store) \
131struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store)
132
Andrew Morton4a7fb632006-08-14 22:43:17 -0700133extern int __must_check driver_create_file(struct device_driver *,
134 struct driver_attribute *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135extern void driver_remove_file(struct device_driver *, struct driver_attribute *);
136
Andrew Morton4a7fb632006-08-14 22:43:17 -0700137extern int __must_check driver_for_each_device(struct device_driver * drv,
138 struct device *start, void *data,
139 int (*fn)(struct device *, void *));
Cornelia Huck0edb5862005-06-22 16:59:51 +0200140struct device * driver_find_device(struct device_driver *drv,
141 struct device *start, void *data,
142 int (*match)(struct device *, void *));
mochel@digitalimplant.orgfae3cd02005-03-21 10:59:56 -0800143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144/*
145 * device classes
146 */
147struct class {
Dmitry Torokhov8d790d72005-04-26 02:34:05 -0500148 const char * name;
gregkh@suse.dee9ba6362005-03-15 11:54:21 -0800149 struct module * owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151 struct subsystem subsys;
152 struct list_head children;
Greg Kroah-Hartman23681e42006-06-14 12:14:34 -0700153 struct list_head devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 struct list_head interfaces;
155 struct semaphore sem; /* locks both the children and interfaces lists */
156
Greg Kroah-Hartmanc205ef42006-08-07 22:19:37 -0700157 struct kobject *virtual_dir;
158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 struct class_attribute * class_attrs;
160 struct class_device_attribute * class_dev_attrs;
Greg Kroah-Hartman2620efe2006-06-28 16:19:58 -0700161 struct device_attribute * dev_attrs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
Kay Sievers312c0042005-11-16 09:00:00 +0100163 int (*uevent)(struct class_device *dev, char **envp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 int num_envp, char *buffer, int buffer_size);
Greg Kroah-Hartman2620efe2006-06-28 16:19:58 -0700165 int (*dev_uevent)(struct device *dev, char **envp, int num_envp,
166 char *buffer, int buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168 void (*release)(struct class_device *dev);
169 void (*class_release)(struct class *class);
Greg Kroah-Hartman2620efe2006-06-28 16:19:58 -0700170 void (*dev_release)(struct device *dev);
Linus Torvalds7c8265f2006-06-24 14:50:29 -0700171
172 int (*suspend)(struct device *, pm_message_t state);
173 int (*resume)(struct device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174};
175
Andrew Morton4a7fb632006-08-14 22:43:17 -0700176extern int __must_check class_register(struct class *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177extern void class_unregister(struct class *);
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180struct class_attribute {
181 struct attribute attr;
182 ssize_t (*show)(struct class *, char * buf);
183 ssize_t (*store)(struct class *, const char * buf, size_t count);
184};
185
186#define CLASS_ATTR(_name,_mode,_show,_store) \
187struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store)
188
Andrew Morton4a7fb632006-08-14 22:43:17 -0700189extern int __must_check class_create_file(struct class *,
190 const struct class_attribute *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191extern void class_remove_file(struct class *, const struct class_attribute *);
192
Kay Sieversa7fd6702005-10-01 14:49:43 +0200193struct class_device_attribute {
194 struct attribute attr;
195 ssize_t (*show)(struct class_device *, char * buf);
196 ssize_t (*store)(struct class_device *, const char * buf, size_t count);
197};
198
199#define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \
200struct class_device_attribute class_device_attr_##_name = \
201 __ATTR(_name,_mode,_show,_store)
202
Andrew Morton4a7fb632006-08-14 22:43:17 -0700203extern int __must_check class_device_create_file(struct class_device *,
Kay Sieversa7fd6702005-10-01 14:49:43 +0200204 const struct class_device_attribute *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
Greg Kroah-Hartman74be2272005-10-27 22:25:43 -0700206/**
207 * struct class_device - class devices
208 * @class: pointer to the parent class for this class device. This is required.
209 * @devt: for internal use by the driver core only.
210 * @node: for internal use by the driver core only.
211 * @kobj: for internal use by the driver core only.
212 * @devt_attr: for internal use by the driver core only.
Stephen Hemminger14982212006-05-06 17:55:11 -0700213 * @groups: optional additional groups to be created
Greg Kroah-Hartman74be2272005-10-27 22:25:43 -0700214 * @dev: if set, a symlink to the struct device is created in the sysfs
215 * directory for this struct class device.
216 * @class_data: pointer to whatever you want to store here for this struct
217 * class_device. Use class_get_devdata() and class_set_devdata() to get and
218 * set this pointer.
219 * @parent: pointer to a struct class_device that is the parent of this struct
220 * class_device. If NULL, this class_device will show up at the root of the
221 * struct class in sysfs (which is probably what you want to have happen.)
222 * @release: pointer to a release function for this struct class_device. If
223 * set, this will be called instead of the class specific release function.
224 * Only use this if you want to override the default release function, like
225 * when you are nesting class_device structures.
Kay Sievers312c0042005-11-16 09:00:00 +0100226 * @uevent: pointer to a uevent function for this struct class_device. If
227 * set, this will be called instead of the class specific uevent function.
228 * Only use this if you want to override the default uevent function, like
Greg Kroah-Hartman74be2272005-10-27 22:25:43 -0700229 * when you are nesting class_device structures.
230 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231struct class_device {
232 struct list_head node;
233
234 struct kobject kobj;
235 struct class * class; /* required */
236 dev_t devt; /* dev_t, creates the sysfs "dev" */
gregkh@suse.dee9ba6362005-03-15 11:54:21 -0800237 struct class_device_attribute *devt_attr;
Kay Sieversa7fd6702005-10-01 14:49:43 +0200238 struct class_device_attribute uevent_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 struct device * dev; /* not necessary, but nice to have */
240 void * class_data; /* class-specific data */
Greg Kroah-Hartman51d172d2005-10-27 22:25:43 -0700241 struct class_device *parent; /* parent of this child device, if there is one */
Stephen Hemminger14982212006-05-06 17:55:11 -0700242 struct attribute_group ** groups; /* optional groups */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Greg Kroah-Hartman51d172d2005-10-27 22:25:43 -0700244 void (*release)(struct class_device *dev);
Kay Sievers312c0042005-11-16 09:00:00 +0100245 int (*uevent)(struct class_device *dev, char **envp,
Greg Kroah-Hartman51d172d2005-10-27 22:25:43 -0700246 int num_envp, char *buffer, int buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 char class_id[BUS_ID_SIZE]; /* unique to this class */
248};
249
250static inline void *
251class_get_devdata (struct class_device *dev)
252{
253 return dev->class_data;
254}
255
256static inline void
257class_set_devdata (struct class_device *dev, void *data)
258{
259 dev->class_data = data;
260}
261
262
Andrew Morton4a7fb632006-08-14 22:43:17 -0700263extern int __must_check class_device_register(struct class_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264extern void class_device_unregister(struct class_device *);
265extern void class_device_initialize(struct class_device *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700266extern int __must_check class_device_add(struct class_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267extern void class_device_del(struct class_device *);
268
269extern int class_device_rename(struct class_device *, char *);
270
271extern struct class_device * class_device_get(struct class_device *);
272extern void class_device_put(struct class_device *);
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274extern void class_device_remove_file(struct class_device *,
275 const struct class_device_attribute *);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700276extern int __must_check class_device_create_bin_file(struct class_device *,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 struct bin_attribute *);
278extern void class_device_remove_bin_file(struct class_device *,
279 struct bin_attribute *);
280
281struct class_interface {
282 struct list_head node;
283 struct class *class;
284
Dmitry Torokhovd8539d82005-09-15 02:01:36 -0500285 int (*add) (struct class_device *, struct class_interface *);
286 void (*remove) (struct class_device *, struct class_interface *);
Greg Kroah-Hartmanc47ed212006-09-13 15:34:05 +0200287 int (*add_dev) (struct device *, struct class_interface *);
288 void (*remove_dev) (struct device *, struct class_interface *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289};
290
Andrew Morton4a7fb632006-08-14 22:43:17 -0700291extern int __must_check class_interface_register(struct class_interface *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292extern void class_interface_unregister(struct class_interface *);
293
Miguel Ojeda Sandonisab7d7372006-09-13 15:34:05 +0200294extern struct class *class_create(struct module *owner, const char *name);
gregkh@suse.dee9ba6362005-03-15 11:54:21 -0800295extern void class_destroy(struct class *cls);
Greg Kroah-Hartman51d172d2005-10-27 22:25:43 -0700296extern struct class_device *class_device_create(struct class *cls,
297 struct class_device *parent,
298 dev_t devt,
299 struct device *device,
Dmitry Torokhovddd5d352006-08-10 01:18:18 -0400300 const char *fmt, ...)
Greg Kroah-Hartman51d172d2005-10-27 22:25:43 -0700301 __attribute__((format(printf,5,6)));
gregkh@suse.dee9ba6362005-03-15 11:54:21 -0800302extern void class_device_destroy(struct class *cls, dev_t devt);
303
Kay Sieversa7fd6702005-10-01 14:49:43 +0200304/* interface for exporting device attributes */
305struct device_attribute {
306 struct attribute attr;
307 ssize_t (*show)(struct device *dev, struct device_attribute *attr,
308 char *buf);
309 ssize_t (*store)(struct device *dev, struct device_attribute *attr,
310 const char *buf, size_t count);
311};
312
313#define DEVICE_ATTR(_name,_mode,_show,_store) \
314struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store)
315
Andrew Morton4a7fb632006-08-14 22:43:17 -0700316extern int __must_check device_create_file(struct device *device,
317 struct device_attribute * entry);
Kay Sieversa7fd6702005-10-01 14:49:43 +0200318extern void device_remove_file(struct device * dev, struct device_attribute * attr);
Greg Kroah-Hartman2589f1882006-09-19 09:39:19 -0700319extern int __must_check device_create_bin_file(struct device *dev,
320 struct bin_attribute *attr);
321extern void device_remove_bin_file(struct device *dev,
322 struct bin_attribute *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323struct device {
mochel@digitalimplant.org36239572005-03-24 19:08:30 -0800324 struct klist klist_children;
325 struct klist_node knode_parent; /* node in sibling list */
mochel@digitalimplant.org94e7b1c52005-03-21 12:25:36 -0800326 struct klist_node knode_driver;
mochel@digitalimplant.org465c7a32005-03-21 11:49:14 -0800327 struct klist_node knode_bus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 struct device * parent;
329
330 struct kobject kobj;
331 char bus_id[BUS_ID_SIZE]; /* position on parent bus */
Alan Sternf2eaae12006-09-18 16:22:34 -0400332 unsigned is_registered:1;
Kay Sieversa7fd6702005-10-01 14:49:43 +0200333 struct device_attribute uevent_attr;
Greg Kroah-Hartman23681e42006-06-14 12:14:34 -0700334 struct device_attribute *devt_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
mochel@digitalimplant.orgaf703162005-03-21 10:41:04 -0800336 struct semaphore sem; /* semaphore to synchronize calls to
337 * its driver.
338 */
339
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 struct bus_type * bus; /* type of bus device is on */
341 struct device_driver *driver; /* which driver has allocated this
342 device */
343 void *driver_data; /* data private to the driver */
David Shaohua Li4e10d122005-03-18 18:45:35 -0500344 void *platform_data; /* Platform specific data, device
345 core doesn't touch it */
346 void *firmware_data; /* Firmware specific data (e.g. ACPI,
347 BIOS data),reserved for device core*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 struct dev_pm_info power;
349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 u64 *dma_mask; /* dma mask (if dma'able device) */
351 u64 coherent_dma_mask;/* Like dma_mask, but for
352 alloc_coherent mappings as
353 not all hardware supports
354 64 bit addresses for consistent
355 allocations such descriptors. */
356
357 struct list_head dma_pools; /* dma pools (if dma'ble) */
358
359 struct dma_coherent_mem *dma_mem; /* internal for coherent mem
360 override */
361
Greg Kroah-Hartman23681e42006-06-14 12:14:34 -0700362 /* class_device migration path */
363 struct list_head node;
364 struct class *class; /* optional*/
365 dev_t devt; /* dev_t, creates the sysfs "dev" */
Greg Kroah-Hartmande0ff002006-06-27 00:06:09 -0700366 struct attribute_group **groups; /* optional groups */
Greg Kroah-Hartman23681e42006-06-14 12:14:34 -0700367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 void (*release)(struct device * dev);
369};
370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371static inline void *
372dev_get_drvdata (struct device *dev)
373{
374 return dev->driver_data;
375}
376
377static inline void
378dev_set_drvdata (struct device *dev, void *data)
379{
380 dev->driver_data = data;
381}
382
Daniel Ritzd305ef52005-09-22 00:47:24 -0700383static inline int device_is_registered(struct device *dev)
384{
Alan Sternf2eaae12006-09-18 16:22:34 -0400385 return dev->is_registered;
Daniel Ritzd305ef52005-09-22 00:47:24 -0700386}
387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388/*
389 * High level routines for use by the bus drivers
390 */
Andrew Morton4a7fb632006-08-14 22:43:17 -0700391extern int __must_check device_register(struct device * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392extern void device_unregister(struct device * dev);
393extern void device_initialize(struct device * dev);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700394extern int __must_check device_add(struct device * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395extern void device_del(struct device * dev);
Russell King04fed362006-10-22 15:57:18 +0100396extern int device_for_each_child(struct device *, void *,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 int (*fn)(struct device *, void *));
Greg Kroah-Hartmana2de48c2006-07-03 14:31:12 -0700398extern int device_rename(struct device *dev, char *new_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
400/*
401 * Manual binding of a device to driver. See drivers/base/bus.c
402 * for information on use.
403 */
Andrew Mortonf86db392006-08-14 22:43:20 -0700404extern int __must_check device_bind_driver(struct device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405extern void device_release_driver(struct device * dev);
Andrew Morton4a7fb632006-08-14 22:43:17 -0700406extern int __must_check device_attach(struct device * dev);
Andrew Mortonf86db392006-08-14 22:43:20 -0700407extern int __must_check driver_attach(struct device_driver *drv);
408extern int __must_check device_reprobe(struct device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Greg Kroah-Hartman23681e42006-06-14 12:14:34 -0700410/*
411 * Easy functions for dynamically creating devices on the fly
412 */
413extern struct device *device_create(struct class *cls, struct device *parent,
Greg Kroah-Hartman5cbe5f82006-08-10 01:19:19 -0400414 dev_t devt, const char *fmt, ...)
Greg Kroah-Hartman23681e42006-06-14 12:14:34 -0700415 __attribute__((format(printf,4,5)));
416extern void device_destroy(struct class *cls, dev_t devt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Greg Kroah-Hartmanc205ef42006-08-07 22:19:37 -0700418extern int virtual_device_parent(struct device *dev);
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420/*
421 * Platform "fixup" functions - allow the platform to have their say
422 * about devices and actions that the general device layer doesn't
423 * know about.
424 */
425/* Notify platform of device discovery */
426extern int (*platform_notify)(struct device * dev);
427
428extern int (*platform_notify_remove)(struct device * dev);
429
430
431/**
432 * get_device - atomically increment the reference count for the device.
433 *
434 */
435extern struct device * get_device(struct device * dev);
436extern void put_device(struct device * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
438
Rytchkov Alexey116f232b2006-03-22 00:58:53 +0100439/* drivers/base/power/shutdown.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440extern void device_shutdown(void);
441
442
443/* drivers/base/firmware.c */
Andrew Morton4a7fb632006-08-14 22:43:17 -0700444extern int __must_check firmware_register(struct subsystem *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445extern void firmware_unregister(struct subsystem *);
446
447/* debugging and troubleshooting/diagnostic helpers. */
Alan Stern3e956372006-06-16 17:10:48 -0400448extern const char *dev_driver_string(struct device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449#define dev_printk(level, dev, format, arg...) \
Alan Stern3e956372006-06-16 17:10:48 -0400450 printk(level "%s %s: " format , dev_driver_string(dev) , (dev)->bus_id , ## arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452#ifdef DEBUG
453#define dev_dbg(dev, format, arg...) \
454 dev_printk(KERN_DEBUG , dev , format , ## arg)
455#else
456#define dev_dbg(dev, format, arg...) do { (void)(dev); } while (0)
457#endif
458
459#define dev_err(dev, format, arg...) \
460 dev_printk(KERN_ERR , dev , format , ## arg)
461#define dev_info(dev, format, arg...) \
462 dev_printk(KERN_INFO , dev , format , ## arg)
463#define dev_warn(dev, format, arg...) \
464 dev_printk(KERN_WARNING , dev , format , ## arg)
Tilman Schmidt4f2928d2006-02-24 11:05:45 +0100465#define dev_notice(dev, format, arg...) \
466 dev_printk(KERN_NOTICE , dev , format , ## arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
468/* Create alias, so I can be autoloaded. */
469#define MODULE_ALIAS_CHARDEV(major,minor) \
470 MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
471#define MODULE_ALIAS_CHARDEV_MAJOR(major) \
472 MODULE_ALIAS("char-major-" __stringify(major) "-*")
473#endif /* _DEVICE_H_ */