Ke Dong | eb337a3 | 2012-09-26 19:17:39 -0700 | [diff] [blame] | 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 <linux/semaphore.h> |
| 26 | #include <asm/atomic.h> |
| 27 | #include <asm/device.h> |
| 28 | |
| 29 | struct device; |
| 30 | struct device_private; |
| 31 | struct device_driver; |
| 32 | struct driver_private; |
| 33 | struct class; |
| 34 | struct class_private; |
| 35 | struct bus_type; |
| 36 | struct bus_type_private; |
| 37 | |
| 38 | struct bus_attribute { |
| 39 | struct attribute attr; |
| 40 | ssize_t (*show)(struct bus_type *bus, char *buf); |
| 41 | ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count); |
| 42 | }; |
| 43 | |
| 44 | #define BUS_ATTR(_name, _mode, _show, _store) \ |
| 45 | struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store) |
| 46 | |
| 47 | extern int __must_check bus_create_file(struct bus_type *, |
| 48 | struct bus_attribute *); |
| 49 | extern void bus_remove_file(struct bus_type *, struct bus_attribute *); |
| 50 | |
| 51 | struct bus_type { |
| 52 | const char *name; |
| 53 | struct bus_attribute *bus_attrs; |
| 54 | struct device_attribute *dev_attrs; |
| 55 | struct driver_attribute *drv_attrs; |
| 56 | |
| 57 | int (*match)(struct device *dev, struct device_driver *drv); |
| 58 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
| 59 | int (*probe)(struct device *dev); |
| 60 | int (*remove)(struct device *dev); |
| 61 | void (*shutdown)(struct device *dev); |
| 62 | |
| 63 | int (*suspend)(struct device *dev, pm_message_t state); |
| 64 | int (*resume)(struct device *dev); |
| 65 | |
| 66 | const struct dev_pm_ops *pm; |
| 67 | |
| 68 | struct bus_type_private *p; |
| 69 | }; |
| 70 | |
| 71 | extern int __must_check bus_register(struct bus_type *bus); |
| 72 | extern void bus_unregister(struct bus_type *bus); |
| 73 | |
| 74 | extern int __must_check bus_rescan_devices(struct bus_type *bus); |
| 75 | |
| 76 | /* iterator helpers for buses */ |
| 77 | |
| 78 | int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, |
| 79 | int (*fn)(struct device *dev, void *data)); |
| 80 | struct device *bus_find_device(struct bus_type *bus, struct device *start, |
| 81 | void *data, |
| 82 | int (*match)(struct device *dev, void *data)); |
| 83 | struct device *bus_find_device_by_name(struct bus_type *bus, |
| 84 | struct device *start, |
| 85 | const char *name); |
| 86 | |
| 87 | int __must_check bus_for_each_drv(struct bus_type *bus, |
| 88 | struct device_driver *start, void *data, |
| 89 | int (*fn)(struct device_driver *, void *)); |
| 90 | |
| 91 | void bus_sort_breadthfirst(struct bus_type *bus, |
| 92 | int (*compare)(const struct device *a, |
| 93 | const struct device *b)); |
| 94 | /* |
| 95 | * Bus notifiers: Get notified of addition/removal of devices |
| 96 | * and binding/unbinding of drivers to devices. |
| 97 | * In the long run, it should be a replacement for the platform |
| 98 | * notify hooks. |
| 99 | */ |
| 100 | struct notifier_block; |
| 101 | |
| 102 | extern int bus_register_notifier(struct bus_type *bus, |
| 103 | struct notifier_block *nb); |
| 104 | extern int bus_unregister_notifier(struct bus_type *bus, |
| 105 | struct notifier_block *nb); |
| 106 | |
| 107 | /* All 4 notifers below get called with the target struct device * |
| 108 | * as an argument. Note that those functions are likely to be called |
| 109 | * with the device semaphore held in the core, so be careful. |
| 110 | */ |
| 111 | #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ |
| 112 | #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ |
| 113 | #define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ |
| 114 | #define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be |
| 115 | unbound */ |
| 116 | #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound |
| 117 | from the device */ |
| 118 | |
| 119 | extern struct kset *bus_get_kset(struct bus_type *bus); |
| 120 | extern struct klist *bus_get_device_klist(struct bus_type *bus); |
| 121 | |
| 122 | struct 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 | int (*probe) (struct device *dev); |
| 132 | int (*remove) (struct device *dev); |
| 133 | void (*shutdown) (struct device *dev); |
| 134 | int (*suspend) (struct device *dev, pm_message_t state); |
| 135 | int (*resume) (struct device *dev); |
| 136 | const struct attribute_group **groups; |
| 137 | |
| 138 | const struct dev_pm_ops *pm; |
| 139 | |
| 140 | struct driver_private *p; |
| 141 | }; |
| 142 | |
| 143 | |
| 144 | extern int __must_check driver_register(struct device_driver *drv); |
| 145 | extern void driver_unregister(struct device_driver *drv); |
| 146 | |
| 147 | extern struct device_driver *get_driver(struct device_driver *drv); |
| 148 | extern void put_driver(struct device_driver *drv); |
| 149 | extern struct device_driver *driver_find(const char *name, |
| 150 | struct bus_type *bus); |
| 151 | extern int driver_probe_done(void); |
| 152 | extern void wait_for_device_probe(void); |
| 153 | |
| 154 | |
| 155 | /* sysfs interface for exporting driver attributes */ |
| 156 | |
| 157 | struct driver_attribute { |
| 158 | struct attribute attr; |
| 159 | ssize_t (*show)(struct device_driver *driver, char *buf); |
| 160 | ssize_t (*store)(struct device_driver *driver, const char *buf, |
| 161 | size_t count); |
| 162 | }; |
| 163 | |
| 164 | #define DRIVER_ATTR(_name, _mode, _show, _store) \ |
| 165 | struct driver_attribute driver_attr_##_name = \ |
| 166 | __ATTR(_name, _mode, _show, _store) |
| 167 | |
| 168 | extern int __must_check driver_create_file(struct device_driver *driver, |
| 169 | struct driver_attribute *attr); |
| 170 | extern void driver_remove_file(struct device_driver *driver, |
| 171 | struct driver_attribute *attr); |
| 172 | |
| 173 | extern int __must_check driver_add_kobj(struct device_driver *drv, |
| 174 | struct kobject *kobj, |
| 175 | const char *fmt, ...); |
| 176 | |
| 177 | extern int __must_check driver_for_each_device(struct device_driver *drv, |
| 178 | struct device *start, |
| 179 | void *data, |
| 180 | int (*fn)(struct device *dev, |
| 181 | void *)); |
| 182 | struct device *driver_find_device(struct device_driver *drv, |
| 183 | struct device *start, void *data, |
| 184 | int (*match)(struct device *dev, void *data)); |
| 185 | |
| 186 | /* |
| 187 | * device classes |
| 188 | */ |
| 189 | struct class { |
| 190 | const char *name; |
| 191 | struct module *owner; |
| 192 | |
| 193 | struct class_attribute *class_attrs; |
| 194 | struct device_attribute *dev_attrs; |
| 195 | struct kobject *dev_kobj; |
| 196 | |
| 197 | int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env); |
| 198 | char *(*devnode)(struct device *dev, mode_t *mode); |
| 199 | |
| 200 | void (*class_release)(struct class *class); |
| 201 | void (*dev_release)(struct device *dev); |
| 202 | |
| 203 | int (*suspend)(struct device *dev, pm_message_t state); |
| 204 | int (*resume)(struct device *dev); |
| 205 | |
| 206 | const struct dev_pm_ops *pm; |
| 207 | |
| 208 | struct class_private *p; |
| 209 | }; |
| 210 | |
| 211 | struct class_dev_iter { |
| 212 | struct klist_iter ki; |
| 213 | const struct device_type *type; |
| 214 | }; |
| 215 | |
| 216 | extern struct kobject *sysfs_dev_block_kobj; |
| 217 | extern struct kobject *sysfs_dev_char_kobj; |
| 218 | extern int __must_check __class_register(struct class *class, |
| 219 | struct lock_class_key *key); |
| 220 | extern void class_unregister(struct class *class); |
| 221 | |
| 222 | /* This is a #define to keep the compiler from merging different |
| 223 | * instances of the __key variable */ |
| 224 | #define class_register(class) \ |
| 225 | ({ \ |
| 226 | static struct lock_class_key __key; \ |
| 227 | __class_register(class, &__key); \ |
| 228 | }) |
| 229 | |
| 230 | struct class_compat; |
| 231 | struct class_compat *class_compat_register(const char *name); |
| 232 | void class_compat_unregister(struct class_compat *cls); |
| 233 | int class_compat_create_link(struct class_compat *cls, struct device *dev, |
| 234 | struct device *device_link); |
| 235 | void class_compat_remove_link(struct class_compat *cls, struct device *dev, |
| 236 | struct device *device_link); |
| 237 | |
| 238 | extern void class_dev_iter_init(struct class_dev_iter *iter, |
| 239 | struct class *class, |
| 240 | struct device *start, |
| 241 | const struct device_type *type); |
| 242 | extern struct device *class_dev_iter_next(struct class_dev_iter *iter); |
| 243 | extern void class_dev_iter_exit(struct class_dev_iter *iter); |
| 244 | |
| 245 | extern int class_for_each_device(struct class *class, struct device *start, |
| 246 | void *data, |
| 247 | int (*fn)(struct device *dev, void *data)); |
| 248 | extern struct device *class_find_device(struct class *class, |
| 249 | struct device *start, void *data, |
| 250 | int (*match)(struct device *, void *)); |
| 251 | |
| 252 | struct class_attribute { |
| 253 | struct attribute attr; |
| 254 | ssize_t (*show)(struct class *class, char *buf); |
| 255 | ssize_t (*store)(struct class *class, const char *buf, size_t count); |
| 256 | }; |
| 257 | |
| 258 | #define CLASS_ATTR(_name, _mode, _show, _store) \ |
| 259 | struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store) |
| 260 | |
| 261 | extern int __must_check class_create_file(struct class *class, |
| 262 | const struct class_attribute *attr); |
| 263 | extern void class_remove_file(struct class *class, |
| 264 | const struct class_attribute *attr); |
| 265 | |
| 266 | struct class_interface { |
| 267 | struct list_head node; |
| 268 | struct class *class; |
| 269 | |
| 270 | int (*add_dev) (struct device *, struct class_interface *); |
| 271 | void (*remove_dev) (struct device *, struct class_interface *); |
| 272 | }; |
| 273 | |
| 274 | extern int __must_check class_interface_register(struct class_interface *); |
| 275 | extern void class_interface_unregister(struct class_interface *); |
| 276 | |
| 277 | extern struct class * __must_check __class_create(struct module *owner, |
| 278 | const char *name, |
| 279 | struct lock_class_key *key); |
| 280 | extern void class_destroy(struct class *cls); |
| 281 | |
| 282 | /* This is a #define to keep the compiler from merging different |
| 283 | * instances of the __key variable */ |
| 284 | #define class_create(owner, name) \ |
| 285 | ({ \ |
| 286 | static struct lock_class_key __key; \ |
| 287 | __class_create(owner, name, &__key); \ |
| 288 | }) |
| 289 | |
| 290 | /* |
| 291 | * The type of device, "struct device" is embedded in. A class |
| 292 | * or bus can contain devices of different types |
| 293 | * like "partitions" and "disks", "mouse" and "event". |
| 294 | * This identifies the device type and carries type-specific |
| 295 | * information, equivalent to the kobj_type of a kobject. |
| 296 | * If "name" is specified, the uevent will contain it in |
| 297 | * the DEVTYPE variable. |
| 298 | */ |
| 299 | struct device_type { |
| 300 | const char *name; |
| 301 | const struct attribute_group **groups; |
| 302 | int (*uevent)(struct device *dev, struct kobj_uevent_env *env); |
| 303 | char *(*devnode)(struct device *dev, mode_t *mode); |
| 304 | void (*release)(struct device *dev); |
| 305 | |
| 306 | const struct dev_pm_ops *pm; |
| 307 | }; |
| 308 | |
| 309 | /* interface for exporting device attributes */ |
| 310 | struct device_attribute { |
| 311 | struct attribute attr; |
| 312 | ssize_t (*show)(struct device *dev, struct device_attribute *attr, |
| 313 | char *buf); |
| 314 | ssize_t (*store)(struct device *dev, struct device_attribute *attr, |
| 315 | const char *buf, size_t count); |
| 316 | }; |
| 317 | |
| 318 | #define DEVICE_ATTR(_name, _mode, _show, _store) \ |
| 319 | struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) |
| 320 | |
| 321 | extern int __must_check device_create_file(struct device *device, |
| 322 | struct device_attribute *entry); |
| 323 | extern void device_remove_file(struct device *dev, |
| 324 | struct device_attribute *attr); |
| 325 | extern int __must_check device_create_bin_file(struct device *dev, |
| 326 | struct bin_attribute *attr); |
| 327 | extern void device_remove_bin_file(struct device *dev, |
| 328 | struct bin_attribute *attr); |
| 329 | extern int device_schedule_callback_owner(struct device *dev, |
| 330 | void (*func)(struct device *dev), struct module *owner); |
| 331 | |
| 332 | /* This is a macro to avoid include problems with THIS_MODULE */ |
| 333 | #define device_schedule_callback(dev, func) \ |
| 334 | device_schedule_callback_owner(dev, func, THIS_MODULE) |
| 335 | |
| 336 | /* device resource management */ |
| 337 | typedef void (*dr_release_t)(struct device *dev, void *res); |
| 338 | typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data); |
| 339 | |
| 340 | #ifdef CONFIG_DEBUG_DEVRES |
| 341 | extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, |
| 342 | const char *name); |
| 343 | #define devres_alloc(release, size, gfp) \ |
| 344 | __devres_alloc(release, size, gfp, #release) |
| 345 | #else |
| 346 | extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); |
| 347 | #endif |
| 348 | extern void devres_free(void *res); |
| 349 | extern void devres_add(struct device *dev, void *res); |
| 350 | extern void *devres_find(struct device *dev, dr_release_t release, |
| 351 | dr_match_t match, void *match_data); |
| 352 | extern void *devres_get(struct device *dev, void *new_res, |
| 353 | dr_match_t match, void *match_data); |
| 354 | extern void *devres_remove(struct device *dev, dr_release_t release, |
| 355 | dr_match_t match, void *match_data); |
| 356 | extern int devres_destroy(struct device *dev, dr_release_t release, |
| 357 | dr_match_t match, void *match_data); |
| 358 | |
| 359 | /* devres group */ |
| 360 | extern void * __must_check devres_open_group(struct device *dev, void *id, |
| 361 | gfp_t gfp); |
| 362 | extern void devres_close_group(struct device *dev, void *id); |
| 363 | extern void devres_remove_group(struct device *dev, void *id); |
| 364 | extern int devres_release_group(struct device *dev, void *id); |
| 365 | |
| 366 | /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */ |
| 367 | extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp); |
| 368 | extern void devm_kfree(struct device *dev, void *p); |
| 369 | |
| 370 | struct device_dma_parameters { |
| 371 | /* |
| 372 | * a low level driver may set these to teach IOMMU code about |
| 373 | * sg limitations. |
| 374 | */ |
| 375 | unsigned int max_segment_size; |
| 376 | unsigned long segment_boundary_mask; |
| 377 | }; |
| 378 | |
| 379 | struct device { |
| 380 | struct device *parent; |
| 381 | |
| 382 | struct device_private *p; |
| 383 | |
| 384 | struct kobject kobj; |
| 385 | const char *init_name; /* initial name of the device */ |
| 386 | struct device_type *type; |
| 387 | |
| 388 | struct semaphore sem; /* semaphore to synchronize calls to |
| 389 | * its driver. |
| 390 | */ |
| 391 | |
| 392 | struct bus_type *bus; /* type of bus device is on */ |
| 393 | struct device_driver *driver; /* which driver has allocated this |
| 394 | device */ |
| 395 | void *platform_data; /* Platform specific data, device |
| 396 | core doesn't touch it */ |
| 397 | struct dev_pm_info power; |
| 398 | |
| 399 | #ifdef CONFIG_NUMA |
| 400 | int numa_node; /* NUMA node this device is close to */ |
| 401 | #endif |
| 402 | u64 *dma_mask; /* dma mask (if dma'able device) */ |
| 403 | u64 coherent_dma_mask;/* Like dma_mask, but for |
| 404 | alloc_coherent mappings as |
| 405 | not all hardware supports |
| 406 | 64 bit addresses for consistent |
| 407 | allocations such descriptors. */ |
| 408 | |
| 409 | struct device_dma_parameters *dma_parms; |
| 410 | |
| 411 | struct list_head dma_pools; /* dma pools (if dma'ble) */ |
| 412 | |
| 413 | struct dma_coherent_mem *dma_mem; /* internal for coherent mem |
| 414 | override */ |
| 415 | /* arch specific additions */ |
| 416 | struct dev_archdata archdata; |
| 417 | |
| 418 | dev_t devt; /* dev_t, creates the sysfs "dev" */ |
| 419 | |
| 420 | spinlock_t devres_lock; |
| 421 | struct list_head devres_head; |
| 422 | |
| 423 | struct klist_node knode_class; |
| 424 | struct class *class; |
| 425 | const struct attribute_group **groups; /* optional groups */ |
| 426 | |
| 427 | void (*release)(struct device *dev); |
| 428 | }; |
| 429 | |
| 430 | /* Get the wakeup routines, which depend on struct device */ |
| 431 | #include <linux/pm_wakeup.h> |
| 432 | |
| 433 | static inline const char *dev_name(const struct device *dev) |
| 434 | { |
| 435 | return kobject_name(&dev->kobj); |
| 436 | } |
| 437 | |
| 438 | extern int dev_set_name(struct device *dev, const char *name, ...) |
| 439 | __attribute__((format(printf, 2, 3))); |
| 440 | |
| 441 | #ifdef CONFIG_NUMA |
| 442 | static inline int dev_to_node(struct device *dev) |
| 443 | { |
| 444 | return dev->numa_node; |
| 445 | } |
| 446 | static inline void set_dev_node(struct device *dev, int node) |
| 447 | { |
| 448 | dev->numa_node = node; |
| 449 | } |
| 450 | #else |
| 451 | static inline int dev_to_node(struct device *dev) |
| 452 | { |
| 453 | return -1; |
| 454 | } |
| 455 | static inline void set_dev_node(struct device *dev, int node) |
| 456 | { |
| 457 | } |
| 458 | #endif |
| 459 | |
| 460 | static inline unsigned int dev_get_uevent_suppress(const struct device *dev) |
| 461 | { |
| 462 | return dev->kobj.uevent_suppress; |
| 463 | } |
| 464 | |
| 465 | static inline void dev_set_uevent_suppress(struct device *dev, int val) |
| 466 | { |
| 467 | dev->kobj.uevent_suppress = val; |
| 468 | } |
| 469 | |
| 470 | static inline int device_is_registered(struct device *dev) |
| 471 | { |
| 472 | return dev->kobj.state_in_sysfs; |
| 473 | } |
| 474 | |
| 475 | void driver_init(void); |
| 476 | |
| 477 | /* |
| 478 | * High level routines for use by the bus drivers |
| 479 | */ |
| 480 | extern int __must_check device_register(struct device *dev); |
| 481 | extern void device_unregister(struct device *dev); |
| 482 | extern void device_initialize(struct device *dev); |
| 483 | extern int __must_check device_add(struct device *dev); |
| 484 | extern void device_del(struct device *dev); |
| 485 | extern int device_for_each_child(struct device *dev, void *data, |
| 486 | int (*fn)(struct device *dev, void *data)); |
| 487 | extern struct device *device_find_child(struct device *dev, void *data, |
| 488 | int (*match)(struct device *dev, void *data)); |
| 489 | extern int device_rename(struct device *dev, char *new_name); |
| 490 | extern int device_move(struct device *dev, struct device *new_parent, |
| 491 | enum dpm_order dpm_order); |
| 492 | extern const char *device_get_devnode(struct device *dev, |
| 493 | mode_t *mode, const char **tmp); |
| 494 | extern void *dev_get_drvdata(const struct device *dev); |
| 495 | extern void dev_set_drvdata(struct device *dev, void *data); |
| 496 | |
| 497 | /* |
| 498 | * Root device objects for grouping under /sys/devices |
| 499 | */ |
| 500 | extern struct device *__root_device_register(const char *name, |
| 501 | struct module *owner); |
| 502 | static inline struct device *root_device_register(const char *name) |
| 503 | { |
| 504 | return __root_device_register(name, THIS_MODULE); |
| 505 | } |
| 506 | extern void root_device_unregister(struct device *root); |
| 507 | |
| 508 | static inline void *dev_get_platdata(const struct device *dev) |
| 509 | { |
| 510 | return dev->platform_data; |
| 511 | } |
| 512 | |
| 513 | /* |
| 514 | * Manual binding of a device to driver. See drivers/base/bus.c |
| 515 | * for information on use. |
| 516 | */ |
| 517 | extern int __must_check device_bind_driver(struct device *dev); |
| 518 | extern void device_release_driver(struct device *dev); |
| 519 | extern int __must_check device_attach(struct device *dev); |
| 520 | extern int __must_check driver_attach(struct device_driver *drv); |
| 521 | extern int __must_check device_reprobe(struct device *dev); |
| 522 | |
| 523 | /* |
| 524 | * Easy functions for dynamically creating devices on the fly |
| 525 | */ |
| 526 | extern struct device *device_create_vargs(struct class *cls, |
| 527 | struct device *parent, |
| 528 | dev_t devt, |
| 529 | void *drvdata, |
| 530 | const char *fmt, |
| 531 | va_list vargs); |
| 532 | extern struct device *device_create(struct class *cls, struct device *parent, |
| 533 | dev_t devt, void *drvdata, |
| 534 | const char *fmt, ...) |
| 535 | __attribute__((format(printf, 5, 6))); |
| 536 | extern void device_destroy(struct class *cls, dev_t devt); |
| 537 | |
| 538 | /* |
| 539 | * Platform "fixup" functions - allow the platform to have their say |
| 540 | * about devices and actions that the general device layer doesn't |
| 541 | * know about. |
| 542 | */ |
| 543 | /* Notify platform of device discovery */ |
| 544 | extern int (*platform_notify)(struct device *dev); |
| 545 | |
| 546 | extern int (*platform_notify_remove)(struct device *dev); |
| 547 | |
| 548 | |
| 549 | /** |
| 550 | * get_device - atomically increment the reference count for the device. |
| 551 | * |
| 552 | */ |
| 553 | extern struct device *get_device(struct device *dev); |
| 554 | extern void put_device(struct device *dev); |
| 555 | |
| 556 | extern void wait_for_device_probe(void); |
| 557 | |
| 558 | #ifdef CONFIG_DEVTMPFS |
| 559 | extern int devtmpfs_create_node(struct device *dev); |
| 560 | extern int devtmpfs_delete_node(struct device *dev); |
| 561 | extern int devtmpfs_mount(const char *mountpoint); |
| 562 | #else |
| 563 | static inline int devtmpfs_create_node(struct device *dev) { return 0; } |
| 564 | static inline int devtmpfs_delete_node(struct device *dev) { return 0; } |
| 565 | static inline int devtmpfs_mount(const char *mountpoint) { return 0; } |
| 566 | #endif |
| 567 | |
| 568 | /* drivers/base/power/shutdown.c */ |
| 569 | extern void device_shutdown(void); |
| 570 | |
| 571 | /* drivers/base/sys.c */ |
| 572 | extern void sysdev_shutdown(void); |
| 573 | |
| 574 | /* debugging and troubleshooting/diagnostic helpers. */ |
| 575 | extern const char *dev_driver_string(const struct device *dev); |
| 576 | #define dev_printk(level, dev, format, arg...) \ |
| 577 | printk(level "%s %s: " format , dev_driver_string(dev) , \ |
| 578 | dev_name(dev) , ## arg) |
| 579 | |
| 580 | #define dev_emerg(dev, format, arg...) \ |
| 581 | dev_printk(KERN_EMERG , dev , format , ## arg) |
| 582 | #define dev_alert(dev, format, arg...) \ |
| 583 | dev_printk(KERN_ALERT , dev , format , ## arg) |
| 584 | #define dev_crit(dev, format, arg...) \ |
| 585 | dev_printk(KERN_CRIT , dev , format , ## arg) |
| 586 | #define dev_err(dev, format, arg...) \ |
| 587 | dev_printk(KERN_ERR , dev , format , ## arg) |
| 588 | #define dev_warn(dev, format, arg...) \ |
| 589 | dev_printk(KERN_WARNING , dev , format , ## arg) |
| 590 | #define dev_notice(dev, format, arg...) \ |
| 591 | dev_printk(KERN_NOTICE , dev , format , ## arg) |
| 592 | #define dev_info(dev, format, arg...) \ |
| 593 | dev_printk(KERN_INFO , dev , format , ## arg) |
| 594 | |
| 595 | #if defined(DEBUG) |
| 596 | #define dev_dbg(dev, format, arg...) \ |
| 597 | dev_printk(KERN_DEBUG , dev , format , ## arg) |
| 598 | #elif defined(CONFIG_DYNAMIC_DEBUG) |
| 599 | #define dev_dbg(dev, format, ...) do { \ |
| 600 | dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ |
| 601 | } while (0) |
| 602 | #else |
| 603 | #define dev_dbg(dev, format, arg...) \ |
| 604 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) |
| 605 | #endif |
| 606 | |
| 607 | #ifdef VERBOSE_DEBUG |
| 608 | #define dev_vdbg dev_dbg |
| 609 | #else |
| 610 | |
| 611 | #define dev_vdbg(dev, format, arg...) \ |
| 612 | ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) |
| 613 | #endif |
| 614 | |
| 615 | /* |
| 616 | * dev_WARN() acts like dev_printk(), but with the key difference |
| 617 | * of using a WARN/WARN_ON to get the message out, including the |
| 618 | * file/line information and a backtrace. |
| 619 | */ |
| 620 | #define dev_WARN(dev, format, arg...) \ |
| 621 | WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg); |
| 622 | |
| 623 | /* Create alias, so I can be autoloaded. */ |
| 624 | #define MODULE_ALIAS_CHARDEV(major,minor) \ |
| 625 | MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) |
| 626 | #define MODULE_ALIAS_CHARDEV_MAJOR(major) \ |
| 627 | MODULE_ALIAS("char-major-" __stringify(major) "-*") |
| 628 | #endif /* _DEVICE_H_ */ |