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1/*
2 * device.h - generic, centralized driver model
3 *
4 * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
5 * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
6 * Copyright (c) 2008-2009 Novell Inc.
7 *
8 * This file is released under the GPLv2
9 *
10 * See Documentation/driver-model/ for more information.
11 */
12
13#ifndef _DEVICE_H_
14#define _DEVICE_H_
15
16#include <linux/ioport.h>
17#include <linux/kobject.h>
18#include <linux/klist.h>
19#include <linux/list.h>
20#include <linux/lockdep.h>
21#include <linux/compiler.h>
22#include <linux/types.h>
23#include <linux/module.h>
24#include <linux/pm.h>
25#include <asm/atomic.h>
26#include <asm/device.h>
27
28struct device;
29struct device_private;
30struct device_driver;
31struct driver_private;
32struct class;
33struct subsys_private;
34struct bus_type;
35struct device_node;
36
37struct bus_attribute {
38 struct attribute attr;
39 ssize_t (*show)(struct bus_type *bus, char *buf);
40 ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count);
41};
42
43#define BUS_ATTR(_name, _mode, _show, _store) \
44struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store)
45
46extern int __must_check bus_create_file(struct bus_type *,
47 struct bus_attribute *);
48extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
49
50struct bus_type {
51 const char *name;
52 struct bus_attribute *bus_attrs;
53 struct device_attribute *dev_attrs;
54 struct driver_attribute *drv_attrs;
55
56 int (*match)(struct device *dev, struct device_driver *drv);
57 int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
58 int (*probe)(struct device *dev);
59 int (*remove)(struct device *dev);
60 void (*shutdown)(struct device *dev);
61
62 int (*suspend)(struct device *dev, pm_message_t state);
63 int (*resume)(struct device *dev);
64
65 const struct dev_pm_ops *pm;
66
67 struct subsys_private *p;
68};
69
70extern int __must_check bus_register(struct bus_type *bus);
71extern void bus_unregister(struct bus_type *bus);
72
73extern int __must_check bus_rescan_devices(struct bus_type *bus);
74
75/* iterator helpers for buses */
76
77int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
78 int (*fn)(struct device *dev, void *data));
79struct device *bus_find_device(struct bus_type *bus, struct device *start,
80 void *data,
81 int (*match)(struct device *dev, void *data));
82struct device *bus_find_device_by_name(struct bus_type *bus,
83 struct device *start,
84 const char *name);
85
86int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
87 void *data, int (*fn)(struct device_driver *, void *));
88
89void bus_sort_breadthfirst(struct bus_type *bus,
90 int (*compare)(const struct device *a,
91 const struct device *b));
92/*
93 * Bus notifiers: Get notified of addition/removal of devices
94 * and binding/unbinding of drivers to devices.
95 * In the long run, it should be a replacement for the platform
96 * notify hooks.
97 */
98struct notifier_block;
99
100extern int bus_register_notifier(struct bus_type *bus,
101 struct notifier_block *nb);
102extern int bus_unregister_notifier(struct bus_type *bus,
103 struct notifier_block *nb);
104
105/* All 4 notifers below get called with the target struct device *
106 * as an argument. Note that those functions are likely to be called
107 * with the device lock held in the core, so be careful.
108 */
109#define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */
110#define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */
111#define BUS_NOTIFY_BIND_DRIVER 0x00000003 /* driver about to be
112 bound */
113#define BUS_NOTIFY_BOUND_DRIVER 0x00000004 /* driver bound to device */
114#define BUS_NOTIFY_UNBIND_DRIVER 0x00000005 /* driver about to be
115 unbound */
116#define BUS_NOTIFY_UNBOUND_DRIVER 0x00000006 /* driver is unbound
117 from the device */
118
119extern struct kset *bus_get_kset(struct bus_type *bus);
120extern struct klist *bus_get_device_klist(struct bus_type *bus);
121
122struct device_driver {
123 const char *name;
124 struct bus_type *bus;
125
126 struct module *owner;
127 const char *mod_name; /* used for built-in modules */
128
129 bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
130
131 const struct of_device_id *of_match_table;
132
133 int (*probe) (struct device *dev);
134 int (*remove) (struct device *dev);
135 void (*shutdown) (struct device *dev);
136 int (*suspend) (struct device *dev, pm_message_t state);
137 int (*resume) (struct device *dev);
138 const struct attribute_group **groups;
139
140 const struct dev_pm_ops *pm;
141
142 struct driver_private *p;
143};
144
145
146extern int __must_check driver_register(struct device_driver *drv);
147extern void driver_unregister(struct device_driver *drv);
148
149extern struct device_driver *get_driver(struct device_driver *drv);
150extern void put_driver(struct device_driver *drv);
151extern struct device_driver *driver_find(const char *name,
152 struct bus_type *bus);
153extern int driver_probe_done(void);
154extern void wait_for_device_probe(void);
155
156
157/* sysfs interface for exporting driver attributes */
158
159struct driver_attribute {
160 struct attribute attr;
161 ssize_t (*show)(struct device_driver *driver, char *buf);
162 ssize_t (*store)(struct device_driver *driver, const char *buf,
163 size_t count);
164};
165
166#define DRIVER_ATTR(_name, _mode, _show, _store) \
167struct driver_attribute driver_attr_##_name = \
168 __ATTR(_name, _mode, _show, _store)
169
170extern int __must_check driver_create_file(struct device_driver *driver,
171 const struct driver_attribute *attr);
172extern void driver_remove_file(struct device_driver *driver,
173 const struct driver_attribute *attr);
174
175extern int __must_check driver_add_kobj(struct device_driver *drv,
176 struct kobject *kobj,
177 const char *fmt, ...);
178
179extern int __must_check driver_for_each_device(struct device_driver *drv,
180 struct device *start,
181 void *data,
182 int (*fn)(struct device *dev,
183 void *));
184struct device *driver_find_device(struct device_driver *drv,
185 struct device *start, void *data,
186 int (*match)(struct device *dev, void *data));
187
188/*
189 * device classes
190 */
191struct class {
192 const char *name;
193 struct module *owner;
194
195 struct class_attribute *class_attrs;
196 struct device_attribute *dev_attrs;
197 struct bin_attribute *dev_bin_attrs;
198 struct kobject *dev_kobj;
199
200 int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
201 char *(*devnode)(struct device *dev, mode_t *mode);
202
203 void (*class_release)(struct class *class);
204 void (*dev_release)(struct device *dev);
205
206 int (*suspend)(struct device *dev, pm_message_t state);
207 int (*resume)(struct device *dev);
208
209 const struct kobj_ns_type_operations *ns_type;
210 const void *(*namespace)(struct device *dev);
211
212 const struct dev_pm_ops *pm;
213
214 struct subsys_private *p;
215};
216
217struct class_dev_iter {
218 struct klist_iter ki;
219 const struct device_type *type;
220};
221
222extern struct kobject *sysfs_dev_block_kobj;
223extern struct kobject *sysfs_dev_char_kobj;
224extern int __must_check __class_register(struct class *class,
225 struct lock_class_key *key);
226extern void class_unregister(struct class *class);
227
228/* This is a #define to keep the compiler from merging different
229 * instances of the __key variable */
230#define class_register(class) \
231({ \
232 static struct lock_class_key __key; \
233 __class_register(class, &__key); \
234})
235
236struct class_compat;
237struct class_compat *class_compat_register(const char *name);
238void class_compat_unregister(struct class_compat *cls);
239int class_compat_create_link(struct class_compat *cls, struct device *dev,
240 struct device *device_link);
241void class_compat_remove_link(struct class_compat *cls, struct device *dev,
242 struct device *device_link);
243
244extern void class_dev_iter_init(struct class_dev_iter *iter,
245 struct class *class,
246 struct device *start,
247 const struct device_type *type);
248extern struct device *class_dev_iter_next(struct class_dev_iter *iter);
249extern void class_dev_iter_exit(struct class_dev_iter *iter);
250
251extern int class_for_each_device(struct class *class, struct device *start,
252 void *data,
253 int (*fn)(struct device *dev, void *data));
254extern struct device *class_find_device(struct class *class,
255 struct device *start, void *data,
256 int (*match)(struct device *, void *));
257
258struct class_attribute {
259 struct attribute attr;
260 ssize_t (*show)(struct class *class, struct class_attribute *attr,
261 char *buf);
262 ssize_t (*store)(struct class *class, struct class_attribute *attr,
263 const char *buf, size_t count);
264};
265
266#define CLASS_ATTR(_name, _mode, _show, _store) \
267struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store)
268
269extern int __must_check class_create_file(struct class *class,
270 const struct class_attribute *attr);
271extern void class_remove_file(struct class *class,
272 const struct class_attribute *attr);
273
274/* Simple class attribute that is just a static string */
275
276struct class_attribute_string {
277 struct class_attribute attr;
278 char *str;
279};
280
281/* Currently read-only only */
282#define _CLASS_ATTR_STRING(_name, _mode, _str) \
283 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
284#define CLASS_ATTR_STRING(_name, _mode, _str) \
285 struct class_attribute_string class_attr_##_name = \
286 _CLASS_ATTR_STRING(_name, _mode, _str)
287
288extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
289 char *buf);
290
291struct class_interface {
292 struct list_head node;
293 struct class *class;
294
295 int (*add_dev) (struct device *, struct class_interface *);
296 void (*remove_dev) (struct device *, struct class_interface *);
297};
298
299extern int __must_check class_interface_register(struct class_interface *);
300extern void class_interface_unregister(struct class_interface *);
301
302extern struct class * __must_check __class_create(struct module *owner,
303 const char *name,
304 struct lock_class_key *key);
305extern void class_destroy(struct class *cls);
306
307/* This is a #define to keep the compiler from merging different
308 * instances of the __key variable */
309#define class_create(owner, name) \
310({ \
311 static struct lock_class_key __key; \
312 __class_create(owner, name, &__key); \
313})
314
315/*
316 * The type of device, "struct device" is embedded in. A class
317 * or bus can contain devices of different types
318 * like "partitions" and "disks", "mouse" and "event".
319 * This identifies the device type and carries type-specific
320 * information, equivalent to the kobj_type of a kobject.
321 * If "name" is specified, the uevent will contain it in
322 * the DEVTYPE variable.
323 */
324struct device_type {
325 const char *name;
326 const struct attribute_group **groups;
327 int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
328 char *(*devnode)(struct device *dev, mode_t *mode);
329 void (*release)(struct device *dev);
330
331 const struct dev_pm_ops *pm;
332};
333
334/* interface for exporting device attributes */
335struct device_attribute {
336 struct attribute attr;
337 ssize_t (*show)(struct device *dev, struct device_attribute *attr,
338 char *buf);
339 ssize_t (*store)(struct device *dev, struct device_attribute *attr,
340 const char *buf, size_t count);
341};
342
343#define DEVICE_ATTR(_name, _mode, _show, _store) \
344struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
345
346extern int __must_check device_create_file(struct device *device,
347 const struct device_attribute *entry);
348extern void device_remove_file(struct device *dev,
349 const struct device_attribute *attr);
350extern int __must_check device_create_bin_file(struct device *dev,
351 const struct bin_attribute *attr);
352extern void device_remove_bin_file(struct device *dev,
353 const struct bin_attribute *attr);
354extern int device_schedule_callback_owner(struct device *dev,
355 void (*func)(struct device *dev), struct module *owner);
356
357/* This is a macro to avoid include problems with THIS_MODULE */
358#define device_schedule_callback(dev, func) \
359 device_schedule_callback_owner(dev, func, THIS_MODULE)
360
361/* device resource management */
362typedef void (*dr_release_t)(struct device *dev, void *res);
363typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data);
364
365#ifdef CONFIG_DEBUG_DEVRES
366extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
367 const char *name);
368#define devres_alloc(release, size, gfp) \
369 __devres_alloc(release, size, gfp, #release)
370#else
371extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
372#endif
373extern void devres_free(void *res);
374extern void devres_add(struct device *dev, void *res);
375extern void *devres_find(struct device *dev, dr_release_t release,
376 dr_match_t match, void *match_data);
377extern void *devres_get(struct device *dev, void *new_res,
378 dr_match_t match, void *match_data);
379extern void *devres_remove(struct device *dev, dr_release_t release,
380 dr_match_t match, void *match_data);
381extern int devres_destroy(struct device *dev, dr_release_t release,
382 dr_match_t match, void *match_data);
383
384/* devres group */
385extern void * __must_check devres_open_group(struct device *dev, void *id,
386 gfp_t gfp);
387extern void devres_close_group(struct device *dev, void *id);
388extern void devres_remove_group(struct device *dev, void *id);
389extern int devres_release_group(struct device *dev, void *id);
390
391/* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */
392extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp);
393extern void devm_kfree(struct device *dev, void *p);
394
395struct device_dma_parameters {
396 /*
397 * a low level driver may set these to teach IOMMU code about
398 * sg limitations.
399 */
400 unsigned int max_segment_size;
401 unsigned long segment_boundary_mask;
402};
403
404struct device {
405 struct device *parent;
406
407 struct device_private *p;
408
409 struct kobject kobj;
410 const char *init_name; /* initial name of the device */
411 struct device_type *type;
412
413 struct mutex mutex; /* mutex to synchronize calls to
414 * its driver.
415 */
416
417 struct bus_type *bus; /* type of bus device is on */
418 struct device_driver *driver; /* which driver has allocated this
419 device */
420 void *platform_data; /* Platform specific data, device
421 core doesn't touch it */
422 struct dev_pm_info power;
423 struct dev_power_domain *pwr_domain;
424
425#ifdef CONFIG_NUMA
426 int numa_node; /* NUMA node this device is close to */
427#endif
428 u64 *dma_mask; /* dma mask (if dma'able device) */
429 u64 coherent_dma_mask;/* Like dma_mask, but for
430 alloc_coherent mappings as
431 not all hardware supports
432 64 bit addresses for consistent
433 allocations such descriptors. */
434
435 struct device_dma_parameters *dma_parms;
436
437 struct list_head dma_pools; /* dma pools (if dma'ble) */
438
439 struct dma_coherent_mem *dma_mem; /* internal for coherent mem
440 override */
441 /* arch specific additions */
442 struct dev_archdata archdata;
443
444 struct device_node *of_node; /* associated device tree node */
445 const struct of_device_id *of_match; /* matching of_device_id from driver */
446
447 dev_t devt; /* dev_t, creates the sysfs "dev" */
448
449 spinlock_t devres_lock;
450 struct list_head devres_head;
451
452 struct klist_node knode_class;
453 struct class *class;
454 const struct attribute_group **groups; /* optional groups */
455
456 void (*release)(struct device *dev);
457};
458
459/* Get the wakeup routines, which depend on struct device */
460#include <linux/pm_wakeup.h>
461
462static inline const char *dev_name(const struct device *dev)
463{
464 /* Use the init name until the kobject becomes available */
465 if (dev->init_name)
466 return dev->init_name;
467
468 return kobject_name(&dev->kobj);
469}
470
471extern int dev_set_name(struct device *dev, const char *name, ...)
472 __attribute__((format(printf, 2, 3)));
473
474#ifdef CONFIG_NUMA
475static inline int dev_to_node(struct device *dev)
476{
477 return dev->numa_node;
478}
479static inline void set_dev_node(struct device *dev, int node)
480{
481 dev->numa_node = node;
482}
483#else
484static inline int dev_to_node(struct device *dev)
485{
486 return -1;
487}
488static inline void set_dev_node(struct device *dev, int node)
489{
490}
491#endif
492
493static inline unsigned int dev_get_uevent_suppress(const struct device *dev)
494{
495 return dev->kobj.uevent_suppress;
496}
497
498static inline void dev_set_uevent_suppress(struct device *dev, int val)
499{
500 dev->kobj.uevent_suppress = val;
501}
502
503static inline int device_is_registered(struct device *dev)
504{
505 return dev->kobj.state_in_sysfs;
506}
507
508static inline void device_enable_async_suspend(struct device *dev)
509{
510 if (!dev->power.in_suspend)
511 dev->power.async_suspend = true;
512}
513
514static inline void device_disable_async_suspend(struct device *dev)
515{
516 if (!dev->power.in_suspend)
517 dev->power.async_suspend = false;
518}
519
520static inline bool device_async_suspend_enabled(struct device *dev)
521{
522 return !!dev->power.async_suspend;
523}
524
525static inline void device_lock(struct device *dev)
526{
527 mutex_lock(&dev->mutex);
528}
529
530static inline int device_trylock(struct device *dev)
531{
532 return mutex_trylock(&dev->mutex);
533}
534
535static inline void device_unlock(struct device *dev)
536{
537 mutex_unlock(&dev->mutex);
538}
539
540void driver_init(void);
541
542/*
543 * High level routines for use by the bus drivers
544 */
545extern int __must_check device_register(struct device *dev);
546extern void device_unregister(struct device *dev);
547extern void device_initialize(struct device *dev);
548extern int __must_check device_add(struct device *dev);
549extern void device_del(struct device *dev);
550extern int device_for_each_child(struct device *dev, void *data,
551 int (*fn)(struct device *dev, void *data));
552extern struct device *device_find_child(struct device *dev, void *data,
553 int (*match)(struct device *dev, void *data));
554extern int device_rename(struct device *dev, const char *new_name);
555extern int device_move(struct device *dev, struct device *new_parent,
556 enum dpm_order dpm_order);
557extern const char *device_get_devnode(struct device *dev,
558 mode_t *mode, const char **tmp);
559extern void *dev_get_drvdata(const struct device *dev);
560extern void dev_set_drvdata(struct device *dev, void *data);
561
562/*
563 * Root device objects for grouping under /sys/devices
564 */
565extern struct device *__root_device_register(const char *name,
566 struct module *owner);
567static inline struct device *root_device_register(const char *name)
568{
569 return __root_device_register(name, THIS_MODULE);
570}
571extern void root_device_unregister(struct device *root);
572
573static inline void *dev_get_platdata(const struct device *dev)
574{
575 return dev->platform_data;
576}
577
578/*
579 * Manual binding of a device to driver. See drivers/base/bus.c
580 * for information on use.
581 */
582extern int __must_check device_bind_driver(struct device *dev);
583extern void device_release_driver(struct device *dev);
584extern int __must_check device_attach(struct device *dev);
585extern int __must_check driver_attach(struct device_driver *drv);
586extern int __must_check device_reprobe(struct device *dev);
587
588/*
589 * Easy functions for dynamically creating devices on the fly
590 */
591extern struct device *device_create_vargs(struct class *cls,
592 struct device *parent,
593 dev_t devt,
594 void *drvdata,
595 const char *fmt,
596 va_list vargs);
597extern struct device *device_create(struct class *cls, struct device *parent,
598 dev_t devt, void *drvdata,
599 const char *fmt, ...)
600 __attribute__((format(printf, 5, 6)));
601extern void device_destroy(struct class *cls, dev_t devt);
602
603/*
604 * Platform "fixup" functions - allow the platform to have their say
605 * about devices and actions that the general device layer doesn't
606 * know about.
607 */
608/* Notify platform of device discovery */
609extern int (*platform_notify)(struct device *dev);
610
611extern int (*platform_notify_remove)(struct device *dev);
612
613
614/**
615 * get_device - atomically increment the reference count for the device.
616 *
617 */
618extern struct device *get_device(struct device *dev);
619extern void put_device(struct device *dev);
620
621extern void wait_for_device_probe(void);
622
623#ifdef CONFIG_DEVTMPFS
624extern int devtmpfs_create_node(struct device *dev);
625extern int devtmpfs_delete_node(struct device *dev);
626extern int devtmpfs_mount(const char *mntdir);
627#else
628static inline int devtmpfs_create_node(struct device *dev) { return 0; }
629static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
630static inline int devtmpfs_mount(const char *mountpoint) { return 0; }
631#endif
632
633/* drivers/base/power/shutdown.c */
634extern void device_shutdown(void);
635
636#ifndef CONFIG_ARCH_NO_SYSDEV_OPS
637/* drivers/base/sys.c */
638extern void sysdev_shutdown(void);
639#else
640static inline void sysdev_shutdown(void) { }
641#endif
642
643/* debugging and troubleshooting/diagnostic helpers. */
644extern const char *dev_driver_string(const struct device *dev);
645
646
647#ifdef CONFIG_PRINTK
648
649extern int dev_printk(const char *level, const struct device *dev,
650 const char *fmt, ...)
651 __attribute__ ((format (printf, 3, 4)));
652extern int dev_emerg(const struct device *dev, const char *fmt, ...)
653 __attribute__ ((format (printf, 2, 3)));
654extern int dev_alert(const struct device *dev, const char *fmt, ...)
655 __attribute__ ((format (printf, 2, 3)));
656extern int dev_crit(const struct device *dev, const char *fmt, ...)
657 __attribute__ ((format (printf, 2, 3)));
658extern int dev_err(const struct device *dev, const char *fmt, ...)
659 __attribute__ ((format (printf, 2, 3)));
660extern int dev_warn(const struct device *dev, const char *fmt, ...)
661 __attribute__ ((format (printf, 2, 3)));
662extern int dev_notice(const struct device *dev, const char *fmt, ...)
663 __attribute__ ((format (printf, 2, 3)));
664extern int _dev_info(const struct device *dev, const char *fmt, ...)
665 __attribute__ ((format (printf, 2, 3)));
666
667#else
668
669static inline int dev_printk(const char *level, const struct device *dev,
670 const char *fmt, ...)
671 __attribute__ ((format (printf, 3, 4)));
672static inline int dev_printk(const char *level, const struct device *dev,
673 const char *fmt, ...)
674 { return 0; }
675
676static inline int dev_emerg(const struct device *dev, const char *fmt, ...)
677 __attribute__ ((format (printf, 2, 3)));
678static inline int dev_emerg(const struct device *dev, const char *fmt, ...)
679 { return 0; }
680static inline int dev_crit(const struct device *dev, const char *fmt, ...)
681 __attribute__ ((format (printf, 2, 3)));
682static inline int dev_crit(const struct device *dev, const char *fmt, ...)
683 { return 0; }
684static inline int dev_alert(const struct device *dev, const char *fmt, ...)
685 __attribute__ ((format (printf, 2, 3)));
686static inline int dev_alert(const struct device *dev, const char *fmt, ...)
687 { return 0; }
688static inline int dev_err(const struct device *dev, const char *fmt, ...)
689 __attribute__ ((format (printf, 2, 3)));
690static inline int dev_err(const struct device *dev, const char *fmt, ...)
691 { return 0; }
692static inline int dev_warn(const struct device *dev, const char *fmt, ...)
693 __attribute__ ((format (printf, 2, 3)));
694static inline int dev_warn(const struct device *dev, const char *fmt, ...)
695 { return 0; }
696static inline int dev_notice(const struct device *dev, const char *fmt, ...)
697 __attribute__ ((format (printf, 2, 3)));
698static inline int dev_notice(const struct device *dev, const char *fmt, ...)
699 { return 0; }
700static inline int _dev_info(const struct device *dev, const char *fmt, ...)
701 __attribute__ ((format (printf, 2, 3)));
702static inline int _dev_info(const struct device *dev, const char *fmt, ...)
703 { return 0; }
704
705#endif
706
707/*
708 * Stupid hackaround for existing uses of non-printk uses dev_info
709 *
710 * Note that the definition of dev_info below is actually _dev_info
711 * and a macro is used to avoid redefining dev_info
712 */
713
714#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)
715
716#if defined(DEBUG)
717#define dev_dbg(dev, format, arg...) \
718 dev_printk(KERN_DEBUG, dev, format, ##arg)
719#elif defined(CONFIG_DYNAMIC_DEBUG)
720#define dev_dbg(dev, format, ...) \
721do { \
722 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
723} while (0)
724#else
725#define dev_dbg(dev, format, arg...) \
726({ \
727 if (0) \
728 dev_printk(KERN_DEBUG, dev, format, ##arg); \
729 0; \
730})
731#endif
732
733#ifdef VERBOSE_DEBUG
734#define dev_vdbg dev_dbg
735#else
736#define dev_vdbg(dev, format, arg...) \
737({ \
738 if (0) \
739 dev_printk(KERN_DEBUG, dev, format, ##arg); \
740 0; \
741})
742#endif
743
744/*
745 * dev_WARN() acts like dev_printk(), but with the key difference
746 * of using a WARN/WARN_ON to get the message out, including the
747 * file/line information and a backtrace.
748 */
749#define dev_WARN(dev, format, arg...) \
750 WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg);
751
752/* Create alias, so I can be autoloaded. */
753#define MODULE_ALIAS_CHARDEV(major,minor) \
754 MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
755#define MODULE_ALIAS_CHARDEV_MAJOR(major) \
756 MODULE_ALIAS("char-major-" __stringify(major) "-*")
757
758#ifdef CONFIG_SYSFS_DEPRECATED
759extern long sysfs_deprecated;
760#else
761#define sysfs_deprecated 0
762#endif
763
764#endif /* _DEVICE_H_ */