1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
4 *
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 */
8
9 #ifndef __ACPI_BUS_H__
10 #define __ACPI_BUS_H__
11
12 #include <linux/device.h>
13 #include <linux/property.h>
14
15 /* TBD: Make dynamic */
16 #define ACPI_MAX_HANDLES 10
17 struct acpi_handle_list {
18 u32 count;
19 acpi_handle handles[ACPI_MAX_HANDLES];
20 };
21
22 /* acpi_utils.h */
23 acpi_status
24 acpi_extract_package(union acpi_object *package,
25 struct acpi_buffer *format, struct acpi_buffer *buffer);
26 acpi_status
27 acpi_evaluate_integer(acpi_handle handle,
28 acpi_string pathname,
29 struct acpi_object_list *arguments, unsigned long long *data);
30 acpi_status
31 acpi_evaluate_reference(acpi_handle handle,
32 acpi_string pathname,
33 struct acpi_object_list *arguments,
34 struct acpi_handle_list *list);
35 acpi_status
36 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
37 struct acpi_buffer *status_buf);
38
39 acpi_status
40 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
41
42 bool acpi_has_method(acpi_handle handle, char *name);
43 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
44 u64 arg);
45 acpi_status acpi_evaluate_ej0(acpi_handle handle);
46 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
47 acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function);
48 bool acpi_ata_match(acpi_handle handle);
49 bool acpi_bay_match(acpi_handle handle);
50 bool acpi_dock_match(acpi_handle handle);
51
52 bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs);
53 union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
54 u64 rev, u64 func, union acpi_object *argv4);
55
56 static inline union acpi_object *
acpi_evaluate_dsm_typed(acpi_handle handle,const guid_t * guid,u64 rev,u64 func,union acpi_object * argv4,acpi_object_type type)57 acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
58 u64 func, union acpi_object *argv4,
59 acpi_object_type type)
60 {
61 union acpi_object *obj;
62
63 obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4);
64 if (obj && obj->type != type) {
65 ACPI_FREE(obj);
66 obj = NULL;
67 }
68
69 return obj;
70 }
71
72 #define ACPI_INIT_DSM_ARGV4(cnt, eles) \
73 { \
74 .package.type = ACPI_TYPE_PACKAGE, \
75 .package.count = (cnt), \
76 .package.elements = (eles) \
77 }
78
79 bool acpi_dev_found(const char *hid);
80 bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
81 bool acpi_reduced_hardware(void);
82
83 #ifdef CONFIG_ACPI
84
85 struct proc_dir_entry;
86
87 #define ACPI_BUS_FILE_ROOT "acpi"
88 extern struct proc_dir_entry *acpi_root_dir;
89
90 enum acpi_bus_device_type {
91 ACPI_BUS_TYPE_DEVICE = 0,
92 ACPI_BUS_TYPE_POWER,
93 ACPI_BUS_TYPE_PROCESSOR,
94 ACPI_BUS_TYPE_THERMAL,
95 ACPI_BUS_TYPE_POWER_BUTTON,
96 ACPI_BUS_TYPE_SLEEP_BUTTON,
97 ACPI_BUS_TYPE_ECDT_EC,
98 ACPI_BUS_DEVICE_TYPE_COUNT
99 };
100
101 struct acpi_driver;
102 struct acpi_device;
103
104 /*
105 * ACPI Scan Handler
106 * -----------------
107 */
108
109 struct acpi_hotplug_profile {
110 struct kobject kobj;
111 int (*scan_dependent)(struct acpi_device *adev);
112 void (*notify_online)(struct acpi_device *adev);
113 bool enabled:1;
114 bool demand_offline:1;
115 };
116
to_acpi_hotplug_profile(struct kobject * kobj)117 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
118 struct kobject *kobj)
119 {
120 return container_of(kobj, struct acpi_hotplug_profile, kobj);
121 }
122
123 struct acpi_scan_handler {
124 const struct acpi_device_id *ids;
125 struct list_head list_node;
126 bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
127 int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
128 void (*detach)(struct acpi_device *dev);
129 void (*bind)(struct device *phys_dev);
130 void (*unbind)(struct device *phys_dev);
131 struct acpi_hotplug_profile hotplug;
132 };
133
134 /*
135 * ACPI Hotplug Context
136 * --------------------
137 */
138
139 struct acpi_hotplug_context {
140 struct acpi_device *self;
141 int (*notify)(struct acpi_device *, u32);
142 void (*uevent)(struct acpi_device *, u32);
143 void (*fixup)(struct acpi_device *);
144 };
145
146 /*
147 * ACPI Driver
148 * -----------
149 */
150
151 typedef int (*acpi_op_add) (struct acpi_device * device);
152 typedef int (*acpi_op_remove) (struct acpi_device * device);
153 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
154
155 struct acpi_device_ops {
156 acpi_op_add add;
157 acpi_op_remove remove;
158 acpi_op_notify notify;
159 };
160
161 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */
162
163 struct acpi_driver {
164 char name[80];
165 char class[80];
166 const struct acpi_device_id *ids; /* Supported Hardware IDs */
167 unsigned int flags;
168 struct acpi_device_ops ops;
169 struct device_driver drv;
170 struct module *owner;
171 };
172
173 /*
174 * ACPI Device
175 * -----------
176 */
177
178 /* Status (_STA) */
179
180 struct acpi_device_status {
181 u32 present:1;
182 u32 enabled:1;
183 u32 show_in_ui:1;
184 u32 functional:1;
185 u32 battery_present:1;
186 u32 reserved:27;
187 };
188
189 /* Flags */
190
191 struct acpi_device_flags {
192 u32 dynamic_status:1;
193 u32 removable:1;
194 u32 ejectable:1;
195 u32 power_manageable:1;
196 u32 match_driver:1;
197 u32 initialized:1;
198 u32 visited:1;
199 u32 hotplug_notify:1;
200 u32 is_dock_station:1;
201 u32 of_compatible_ok:1;
202 u32 coherent_dma:1;
203 u32 cca_seen:1;
204 u32 enumeration_by_parent:1;
205 u32 reserved:19;
206 };
207
208 /* File System */
209
210 struct acpi_device_dir {
211 struct proc_dir_entry *entry;
212 };
213
214 #define acpi_device_dir(d) ((d)->dir.entry)
215
216 /* Plug and Play */
217
218 typedef char acpi_bus_id[8];
219 typedef u64 acpi_bus_address;
220 typedef char acpi_device_name[40];
221 typedef char acpi_device_class[20];
222
223 struct acpi_hardware_id {
224 struct list_head list;
225 const char *id;
226 };
227
228 struct acpi_pnp_type {
229 u32 hardware_id:1;
230 u32 bus_address:1;
231 u32 platform_id:1;
232 u32 reserved:29;
233 };
234
235 struct acpi_device_pnp {
236 acpi_bus_id bus_id; /* Object name */
237 int instance_no; /* Instance number of this object */
238 struct acpi_pnp_type type; /* ID type */
239 acpi_bus_address bus_address; /* _ADR */
240 char *unique_id; /* _UID */
241 struct list_head ids; /* _HID and _CIDs */
242 acpi_device_name device_name; /* Driver-determined */
243 acpi_device_class device_class; /* " */
244 union acpi_object *str_obj; /* unicode string for _STR method */
245 };
246
247 #define acpi_device_bid(d) ((d)->pnp.bus_id)
248 #define acpi_device_adr(d) ((d)->pnp.bus_address)
249 const char *acpi_device_hid(struct acpi_device *device);
250 #define acpi_device_uid(d) ((d)->pnp.unique_id)
251 #define acpi_device_name(d) ((d)->pnp.device_name)
252 #define acpi_device_class(d) ((d)->pnp.device_class)
253
254 /* Power Management */
255
256 struct acpi_device_power_flags {
257 u32 explicit_get:1; /* _PSC present? */
258 u32 power_resources:1; /* Power resources */
259 u32 inrush_current:1; /* Serialize Dx->D0 */
260 u32 power_removed:1; /* Optimize Dx->D0 */
261 u32 ignore_parent:1; /* Power is independent of parent power state */
262 u32 dsw_present:1; /* _DSW present? */
263 u32 reserved:26;
264 };
265
266 struct acpi_device_power_state {
267 struct {
268 u8 valid:1;
269 u8 explicit_set:1; /* _PSx present? */
270 u8 reserved:6;
271 } flags;
272 int power; /* % Power (compared to D0) */
273 int latency; /* Dx->D0 time (microseconds) */
274 struct list_head resources; /* Power resources referenced */
275 };
276
277 struct acpi_device_power {
278 int state; /* Current state */
279 struct acpi_device_power_flags flags;
280 struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */
281 };
282
283 /* Performance Management */
284
285 struct acpi_device_perf_flags {
286 u8 reserved:8;
287 };
288
289 struct acpi_device_perf_state {
290 struct {
291 u8 valid:1;
292 u8 reserved:7;
293 } flags;
294 u8 power; /* % Power (compared to P0) */
295 u8 performance; /* % Performance ( " ) */
296 int latency; /* Px->P0 time (microseconds) */
297 };
298
299 struct acpi_device_perf {
300 int state;
301 struct acpi_device_perf_flags flags;
302 int state_count;
303 struct acpi_device_perf_state *states;
304 };
305
306 /* Wakeup Management */
307 struct acpi_device_wakeup_flags {
308 u8 valid:1; /* Can successfully enable wakeup? */
309 u8 notifier_present:1; /* Wake-up notify handler has been installed */
310 };
311
312 struct acpi_device_wakeup_context {
313 void (*func)(struct acpi_device_wakeup_context *context);
314 struct device *dev;
315 };
316
317 struct acpi_device_wakeup {
318 acpi_handle gpe_device;
319 u64 gpe_number;
320 u64 sleep_state;
321 struct list_head resources;
322 struct acpi_device_wakeup_flags flags;
323 struct acpi_device_wakeup_context context;
324 struct wakeup_source *ws;
325 int prepare_count;
326 int enable_count;
327 };
328
329 struct acpi_device_physical_node {
330 unsigned int node_id;
331 struct list_head node;
332 struct device *dev;
333 bool put_online:1;
334 };
335
336 struct acpi_device_properties {
337 const guid_t *guid;
338 const union acpi_object *properties;
339 struct list_head list;
340 };
341
342 /* ACPI Device Specific Data (_DSD) */
343 struct acpi_device_data {
344 const union acpi_object *pointer;
345 struct list_head properties;
346 const union acpi_object *of_compatible;
347 struct list_head subnodes;
348 };
349
350 struct acpi_gpio_mapping;
351
352 /* Device */
353 struct acpi_device {
354 int device_type;
355 acpi_handle handle; /* no handle for fixed hardware */
356 struct fwnode_handle fwnode;
357 struct acpi_device *parent;
358 struct list_head children;
359 struct list_head node;
360 struct list_head wakeup_list;
361 struct list_head del_list;
362 struct acpi_device_status status;
363 struct acpi_device_flags flags;
364 struct acpi_device_pnp pnp;
365 struct acpi_device_power power;
366 struct acpi_device_wakeup wakeup;
367 struct acpi_device_perf performance;
368 struct acpi_device_dir dir;
369 struct acpi_device_data data;
370 struct acpi_scan_handler *handler;
371 struct acpi_hotplug_context *hp;
372 struct acpi_driver *driver;
373 const struct acpi_gpio_mapping *driver_gpios;
374 void *driver_data;
375 struct device dev;
376 unsigned int physical_node_count;
377 unsigned int dep_unmet;
378 struct list_head physical_node_list;
379 struct mutex physical_node_lock;
380 void (*remove)(struct acpi_device *);
381 };
382
383 /* Non-device subnode */
384 struct acpi_data_node {
385 const char *name;
386 acpi_handle handle;
387 struct fwnode_handle fwnode;
388 struct fwnode_handle *parent;
389 struct acpi_device_data data;
390 struct list_head sibling;
391 struct kobject kobj;
392 struct completion kobj_done;
393 };
394
395 extern const struct fwnode_operations acpi_device_fwnode_ops;
396 extern const struct fwnode_operations acpi_data_fwnode_ops;
397 extern const struct fwnode_operations acpi_static_fwnode_ops;
398
399 bool is_acpi_device_node(const struct fwnode_handle *fwnode);
400 bool is_acpi_data_node(const struct fwnode_handle *fwnode);
401
is_acpi_node(const struct fwnode_handle * fwnode)402 static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
403 {
404 return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
405 }
406
407 #define to_acpi_device_node(__fwnode) \
408 ({ \
409 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
410 \
411 is_acpi_device_node(__to_acpi_device_node_fwnode) ? \
412 container_of(__to_acpi_device_node_fwnode, \
413 struct acpi_device, fwnode) : \
414 NULL; \
415 })
416
417 #define to_acpi_data_node(__fwnode) \
418 ({ \
419 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
420 \
421 is_acpi_data_node(__to_acpi_data_node_fwnode) ? \
422 container_of(__to_acpi_data_node_fwnode, \
423 struct acpi_data_node, fwnode) : \
424 NULL; \
425 })
426
is_acpi_static_node(const struct fwnode_handle * fwnode)427 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
428 {
429 return !IS_ERR_OR_NULL(fwnode) &&
430 fwnode->ops == &acpi_static_fwnode_ops;
431 }
432
acpi_data_node_match(const struct fwnode_handle * fwnode,const char * name)433 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
434 const char *name)
435 {
436 return is_acpi_data_node(fwnode) ?
437 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
438 }
439
acpi_fwnode_handle(struct acpi_device * adev)440 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
441 {
442 return &adev->fwnode;
443 }
444
acpi_driver_data(struct acpi_device * d)445 static inline void *acpi_driver_data(struct acpi_device *d)
446 {
447 return d->driver_data;
448 }
449
450 #define to_acpi_device(d) container_of(d, struct acpi_device, dev)
451 #define to_acpi_driver(d) container_of(d, struct acpi_driver, drv)
452
acpi_set_device_status(struct acpi_device * adev,u32 sta)453 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
454 {
455 *((u32 *)&adev->status) = sta;
456 }
457
acpi_set_hp_context(struct acpi_device * adev,struct acpi_hotplug_context * hp)458 static inline void acpi_set_hp_context(struct acpi_device *adev,
459 struct acpi_hotplug_context *hp)
460 {
461 hp->self = adev;
462 adev->hp = hp;
463 }
464
465 void acpi_initialize_hp_context(struct acpi_device *adev,
466 struct acpi_hotplug_context *hp,
467 int (*notify)(struct acpi_device *, u32),
468 void (*uevent)(struct acpi_device *, u32));
469
470 /* acpi_device.dev.bus == &acpi_bus_type */
471 extern struct bus_type acpi_bus_type;
472
473 /*
474 * Events
475 * ------
476 */
477
478 struct acpi_bus_event {
479 struct list_head node;
480 acpi_device_class device_class;
481 acpi_bus_id bus_id;
482 u32 type;
483 u32 data;
484 };
485
486 extern struct kobject *acpi_kobj;
487 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
488 void acpi_bus_private_data_handler(acpi_handle, void *);
489 int acpi_bus_get_private_data(acpi_handle, void **);
490 int acpi_bus_attach_private_data(acpi_handle, void *);
491 void acpi_bus_detach_private_data(acpi_handle);
492 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
493 extern int register_acpi_notifier(struct notifier_block *);
494 extern int unregister_acpi_notifier(struct notifier_block *);
495
496 /*
497 * External Functions
498 */
499
500 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
501 struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
502 void acpi_bus_put_acpi_device(struct acpi_device *adev);
503 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
504 unsigned long long *sta);
505 int acpi_bus_get_status(struct acpi_device *device);
506
507 int acpi_bus_set_power(acpi_handle handle, int state);
508 const char *acpi_power_state_string(int state);
509 int acpi_device_set_power(struct acpi_device *device, int state);
510 int acpi_bus_init_power(struct acpi_device *device);
511 int acpi_device_fix_up_power(struct acpi_device *device);
512 int acpi_bus_update_power(acpi_handle handle, int *state_p);
513 int acpi_device_update_power(struct acpi_device *device, int *state_p);
514 bool acpi_bus_power_manageable(acpi_handle handle);
515 int acpi_device_power_add_dependent(struct acpi_device *adev,
516 struct device *dev);
517 void acpi_device_power_remove_dependent(struct acpi_device *adev,
518 struct device *dev);
519
520 #ifdef CONFIG_PM
521 bool acpi_bus_can_wakeup(acpi_handle handle);
522 #else
acpi_bus_can_wakeup(acpi_handle handle)523 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
524 #endif
525
526 void acpi_scan_lock_acquire(void);
527 void acpi_scan_lock_release(void);
528 void acpi_lock_hp_context(void);
529 void acpi_unlock_hp_context(void);
530 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
531 int acpi_bus_register_driver(struct acpi_driver *driver);
532 void acpi_bus_unregister_driver(struct acpi_driver *driver);
533 int acpi_bus_scan(acpi_handle handle);
534 void acpi_bus_trim(struct acpi_device *start);
535 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
536 int acpi_match_device_ids(struct acpi_device *device,
537 const struct acpi_device_id *ids);
538 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
539 char *modalias, size_t len);
540 int acpi_create_dir(struct acpi_device *);
541 void acpi_remove_dir(struct acpi_device *);
542
acpi_device_enumerated(struct acpi_device * adev)543 static inline bool acpi_device_enumerated(struct acpi_device *adev)
544 {
545 return adev && adev->flags.initialized && adev->flags.visited;
546 }
547
548 /**
549 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
550 * @__acpi_driver: acpi_driver struct
551 *
552 * Helper macro for ACPI drivers which do not do anything special in module
553 * init/exit. This eliminates a lot of boilerplate. Each module may only
554 * use this macro once, and calling it replaces module_init() and module_exit()
555 */
556 #define module_acpi_driver(__acpi_driver) \
557 module_driver(__acpi_driver, acpi_bus_register_driver, \
558 acpi_bus_unregister_driver)
559
560 /*
561 * Bind physical devices with ACPI devices
562 */
563 struct acpi_bus_type {
564 struct list_head list;
565 const char *name;
566 bool (*match)(struct device *dev);
567 struct acpi_device * (*find_companion)(struct device *);
568 void (*setup)(struct device *);
569 void (*cleanup)(struct device *);
570 };
571 int register_acpi_bus_type(struct acpi_bus_type *);
572 int unregister_acpi_bus_type(struct acpi_bus_type *);
573 int acpi_bind_one(struct device *dev, struct acpi_device *adev);
574 int acpi_unbind_one(struct device *dev);
575
576 struct acpi_pci_root {
577 struct acpi_device * device;
578 struct pci_bus *bus;
579 u16 segment;
580 struct resource secondary; /* downstream bus range */
581
582 u32 osc_support_set; /* _OSC state of support bits */
583 u32 osc_control_set; /* _OSC state of control bits */
584 phys_addr_t mcfg_addr;
585 };
586
587 /* helper */
588
589 bool acpi_dma_supported(struct acpi_device *adev);
590 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
591 int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
592 u64 *size);
593 int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
594 const u32 *input_id);
acpi_dma_configure(struct device * dev,enum dev_dma_attr attr)595 static inline int acpi_dma_configure(struct device *dev,
596 enum dev_dma_attr attr)
597 {
598 return acpi_dma_configure_id(dev, attr, NULL);
599 }
600 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
601 u64 address, bool check_children);
602 int acpi_is_root_bridge(acpi_handle);
603 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
604
605 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
606 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
607
608 #ifdef CONFIG_X86
609 bool acpi_device_always_present(struct acpi_device *adev);
610 #else
acpi_device_always_present(struct acpi_device * adev)611 static inline bool acpi_device_always_present(struct acpi_device *adev)
612 {
613 return false;
614 }
615 #endif
616
617 #ifdef CONFIG_PM
618 void acpi_pm_wakeup_event(struct device *dev);
619 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
620 void (*func)(struct acpi_device_wakeup_context *context));
621 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
622 bool acpi_pm_device_can_wakeup(struct device *dev);
623 int acpi_pm_device_sleep_state(struct device *, int *, int);
624 int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
625 #else
acpi_pm_wakeup_event(struct device * dev)626 static inline void acpi_pm_wakeup_event(struct device *dev)
627 {
628 }
acpi_add_pm_notifier(struct acpi_device * adev,struct device * dev,void (* func)(struct acpi_device_wakeup_context * context))629 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
630 struct device *dev,
631 void (*func)(struct acpi_device_wakeup_context *context))
632 {
633 return AE_SUPPORT;
634 }
acpi_remove_pm_notifier(struct acpi_device * adev)635 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
636 {
637 return AE_SUPPORT;
638 }
acpi_pm_device_can_wakeup(struct device * dev)639 static inline bool acpi_pm_device_can_wakeup(struct device *dev)
640 {
641 return false;
642 }
acpi_pm_device_sleep_state(struct device * d,int * p,int m)643 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
644 {
645 if (p)
646 *p = ACPI_STATE_D0;
647
648 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
649 m : ACPI_STATE_D0;
650 }
acpi_pm_set_device_wakeup(struct device * dev,bool enable)651 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
652 {
653 return -ENODEV;
654 }
655 #endif
656
657 #ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT
658 bool acpi_sleep_state_supported(u8 sleep_state);
659 #else
acpi_sleep_state_supported(u8 sleep_state)660 static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; }
661 #endif
662
663 #ifdef CONFIG_ACPI_SLEEP
664 u32 acpi_target_system_state(void);
665 #else
acpi_target_system_state(void)666 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
667 #endif
668
acpi_device_power_manageable(struct acpi_device * adev)669 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
670 {
671 return adev->flags.power_manageable;
672 }
673
acpi_device_can_wakeup(struct acpi_device * adev)674 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
675 {
676 return adev->wakeup.flags.valid;
677 }
678
acpi_device_can_poweroff(struct acpi_device * adev)679 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
680 {
681 return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
682 ((acpi_gbl_FADT.header.revision < 6) &&
683 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
684 }
685
686 bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);
687
688 struct acpi_device *
689 acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
690 struct acpi_device *
691 acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);
692
693 /**
694 * for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria
695 * @adev: pointer to the matching ACPI device, NULL at the end of the loop
696 * @hid: Hardware ID of the device.
697 * @uid: Unique ID of the device, pass NULL to not check _UID
698 * @hrv: Hardware Revision of the device, pass -1 to not check _HRV
699 *
700 * The caller is responsible for invoking acpi_dev_put() on the returned device.
701 *
702 * FIXME: Due to above requirement there is a window that may invalidate @adev
703 * and next iteration will use a dangling pointer, e.g. in the case of a
704 * hotplug event. That said, the caller should ensure that this will never
705 * happen.
706 */
707 #define for_each_acpi_dev_match(adev, hid, uid, hrv) \
708 for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \
709 adev; \
710 adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv))
711
acpi_dev_get(struct acpi_device * adev)712 static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev)
713 {
714 return adev ? to_acpi_device(get_device(&adev->dev)) : NULL;
715 }
716
acpi_dev_put(struct acpi_device * adev)717 static inline void acpi_dev_put(struct acpi_device *adev)
718 {
719 put_device(&adev->dev);
720 }
721 #else /* CONFIG_ACPI */
722
register_acpi_bus_type(void * bus)723 static inline int register_acpi_bus_type(void *bus) { return 0; }
unregister_acpi_bus_type(void * bus)724 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
725
726 #endif /* CONFIG_ACPI */
727
728 #endif /*__ACPI_BUS_H__*/
729