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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
17struct acpi_handle_list {
18 u32 count;
19 acpi_handle handles[ACPI_MAX_HANDLES];
20};
21
22/* acpi_utils.h */
23acpi_status
24acpi_extract_package(union acpi_object *package,
25 struct acpi_buffer *format, struct acpi_buffer *buffer);
26acpi_status
27acpi_evaluate_integer(acpi_handle handle,
28 acpi_string pathname,
29 struct acpi_object_list *arguments, unsigned long long *data);
30acpi_status
31acpi_evaluate_reference(acpi_handle handle,
32 acpi_string pathname,
33 struct acpi_object_list *arguments,
34 struct acpi_handle_list *list);
35acpi_status
36acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
37 struct acpi_buffer *status_buf);
38
39acpi_status
40acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
41
42bool acpi_has_method(acpi_handle handle, char *name);
43acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
44 u64 arg);
45acpi_status acpi_evaluate_ej0(acpi_handle handle);
46acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
47bool acpi_ata_match(acpi_handle handle);
48bool acpi_bay_match(acpi_handle handle);
49bool acpi_dock_match(acpi_handle handle);
50
51bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs);
52union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
53 u64 rev, u64 func, union acpi_object *argv4);
54
55static inline union acpi_object *
56acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
57 u64 func, union acpi_object *argv4,
58 acpi_object_type type)
59{
60 union acpi_object *obj;
61
62 obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4);
63 if (obj && obj->type != type) {
64 ACPI_FREE(obj);
65 obj = NULL;
66 }
67
68 return obj;
69}
70
71#define ACPI_INIT_DSM_ARGV4(cnt, eles) \
72 { \
73 .package.type = ACPI_TYPE_PACKAGE, \
74 .package.count = (cnt), \
75 .package.elements = (eles) \
76 }
77
78bool acpi_dev_found(const char *hid);
79bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
80
81struct acpi_device *
82acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);
83
84#ifdef CONFIG_ACPI
85
86#include <linux/proc_fs.h>
87
88#define ACPI_BUS_FILE_ROOT "acpi"
89extern struct proc_dir_entry *acpi_root_dir;
90
91enum acpi_bus_device_type {
92 ACPI_BUS_TYPE_DEVICE = 0,
93 ACPI_BUS_TYPE_POWER,
94 ACPI_BUS_TYPE_PROCESSOR,
95 ACPI_BUS_TYPE_THERMAL,
96 ACPI_BUS_TYPE_POWER_BUTTON,
97 ACPI_BUS_TYPE_SLEEP_BUTTON,
98 ACPI_BUS_TYPE_ECDT_EC,
99 ACPI_BUS_DEVICE_TYPE_COUNT
100};
101
102struct acpi_driver;
103struct acpi_device;
104
105/*
106 * ACPI Scan Handler
107 * -----------------
108 */
109
110struct acpi_hotplug_profile {
111 struct kobject kobj;
112 int (*scan_dependent)(struct acpi_device *adev);
113 void (*notify_online)(struct acpi_device *adev);
114 bool enabled:1;
115 bool demand_offline:1;
116};
117
118static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
119 struct kobject *kobj)
120{
121 return container_of(kobj, struct acpi_hotplug_profile, kobj);
122}
123
124struct acpi_scan_handler {
125 const struct acpi_device_id *ids;
126 struct list_head list_node;
127 bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
128 int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
129 void (*detach)(struct acpi_device *dev);
130 void (*bind)(struct device *phys_dev);
131 void (*unbind)(struct device *phys_dev);
132 struct acpi_hotplug_profile hotplug;
133};
134
135/*
136 * ACPI Hotplug Context
137 * --------------------
138 */
139
140struct acpi_hotplug_context {
141 struct acpi_device *self;
142 int (*notify)(struct acpi_device *, u32);
143 void (*uevent)(struct acpi_device *, u32);
144 void (*fixup)(struct acpi_device *);
145};
146
147/*
148 * ACPI Driver
149 * -----------
150 */
151
152typedef int (*acpi_op_add) (struct acpi_device * device);
153typedef int (*acpi_op_remove) (struct acpi_device * device);
154typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
155
156struct acpi_device_ops {
157 acpi_op_add add;
158 acpi_op_remove remove;
159 acpi_op_notify notify;
160};
161
162#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */
163
164struct acpi_driver {
165 char name[80];
166 char class[80];
167 const struct acpi_device_id *ids; /* Supported Hardware IDs */
168 unsigned int flags;
169 struct acpi_device_ops ops;
170 struct device_driver drv;
171 struct module *owner;
172};
173
174/*
175 * ACPI Device
176 * -----------
177 */
178
179/* Status (_STA) */
180
181struct acpi_device_status {
182 u32 present:1;
183 u32 enabled:1;
184 u32 show_in_ui:1;
185 u32 functional:1;
186 u32 battery_present:1;
187 u32 reserved:27;
188};
189
190/* Flags */
191
192struct acpi_device_flags {
193 u32 dynamic_status:1;
194 u32 removable:1;
195 u32 ejectable:1;
196 u32 power_manageable:1;
197 u32 match_driver:1;
198 u32 initialized:1;
199 u32 visited:1;
200 u32 hotplug_notify:1;
201 u32 is_dock_station:1;
202 u32 of_compatible_ok:1;
203 u32 coherent_dma:1;
204 u32 cca_seen:1;
205 u32 enumeration_by_parent:1;
206 u32 reserved:19;
207};
208
209/* File System */
210
211struct acpi_device_dir {
212 struct proc_dir_entry *entry;
213};
214
215#define acpi_device_dir(d) ((d)->dir.entry)
216
217/* Plug and Play */
218
219typedef char acpi_bus_id[8];
220typedef u64 acpi_bus_address;
221typedef char acpi_device_name[40];
222typedef char acpi_device_class[20];
223
224struct acpi_hardware_id {
225 struct list_head list;
226 const char *id;
227};
228
229struct acpi_pnp_type {
230 u32 hardware_id:1;
231 u32 bus_address:1;
232 u32 platform_id:1;
233 u32 reserved:29;
234};
235
236struct acpi_device_pnp {
237 acpi_bus_id bus_id; /* Object name */
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)
249const 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
256struct 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
266struct 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
277struct 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
285struct acpi_device_perf_flags {
286 u8 reserved:8;
287};
288
289struct 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
299struct 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 */
307struct 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
312struct acpi_device_wakeup_context {
313 void (*func)(struct acpi_device_wakeup_context *context);
314 struct device *dev;
315};
316
317struct 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
329struct 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
336struct 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) */
343struct 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
350struct acpi_gpio_mapping;
351
352/* Device */
353struct 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 */
384struct 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
395extern const struct fwnode_operations acpi_device_fwnode_ops;
396extern const struct fwnode_operations acpi_data_fwnode_ops;
397extern const struct fwnode_operations acpi_static_fwnode_ops;
398
399bool is_acpi_device_node(const struct fwnode_handle *fwnode);
400bool is_acpi_data_node(const struct fwnode_handle *fwnode);
401
402static 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
427static 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
433static 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
440static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
441{
442 return &adev->fwnode;
443}
444
445static 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
453static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
454{
455 *((u32 *)&adev->status) = sta;
456}
457
458static 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
465void 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 */
471extern struct bus_type acpi_bus_type;
472
473/*
474 * Events
475 * ------
476 */
477
478struct 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
486extern struct kobject *acpi_kobj;
487extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
488void acpi_bus_private_data_handler(acpi_handle, void *);
489int acpi_bus_get_private_data(acpi_handle, void **);
490int acpi_bus_attach_private_data(acpi_handle, void *);
491void acpi_bus_detach_private_data(acpi_handle);
492extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
493extern int register_acpi_notifier(struct notifier_block *);
494extern int unregister_acpi_notifier(struct notifier_block *);
495
496/*
497 * External Functions
498 */
499
500int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
501struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
502void acpi_bus_put_acpi_device(struct acpi_device *adev);
503acpi_status acpi_bus_get_status_handle(acpi_handle handle,
504 unsigned long long *sta);
505int acpi_bus_get_status(struct acpi_device *device);
506
507int acpi_bus_set_power(acpi_handle handle, int state);
508const char *acpi_power_state_string(int state);
509int acpi_device_set_power(struct acpi_device *device, int state);
510int acpi_bus_init_power(struct acpi_device *device);
511int acpi_device_fix_up_power(struct acpi_device *device);
512int acpi_bus_update_power(acpi_handle handle, int *state_p);
513int acpi_device_update_power(struct acpi_device *device, int *state_p);
514bool acpi_bus_power_manageable(acpi_handle handle);
515int acpi_device_power_add_dependent(struct acpi_device *adev,
516 struct device *dev);
517void acpi_device_power_remove_dependent(struct acpi_device *adev,
518 struct device *dev);
519
520#ifdef CONFIG_PM
521bool acpi_bus_can_wakeup(acpi_handle handle);
522#else
523static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
524#endif
525
526void acpi_scan_lock_acquire(void);
527void acpi_scan_lock_release(void);
528void acpi_lock_hp_context(void);
529void acpi_unlock_hp_context(void);
530int acpi_scan_add_handler(struct acpi_scan_handler *handler);
531int acpi_bus_register_driver(struct acpi_driver *driver);
532void acpi_bus_unregister_driver(struct acpi_driver *driver);
533int acpi_bus_scan(acpi_handle handle);
534void acpi_bus_trim(struct acpi_device *start);
535acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
536int acpi_match_device_ids(struct acpi_device *device,
537 const struct acpi_device_id *ids);
538void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
539 char *modalias, size_t len);
540int acpi_create_dir(struct acpi_device *);
541void acpi_remove_dir(struct acpi_device *);
542
543static 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 */
563struct 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};
571int register_acpi_bus_type(struct acpi_bus_type *);
572int unregister_acpi_bus_type(struct acpi_bus_type *);
573int acpi_bind_one(struct device *dev, struct acpi_device *adev);
574int acpi_unbind_one(struct device *dev);
575
576struct 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
589bool acpi_dma_supported(struct acpi_device *adev);
590enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
591int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
592 u64 *size);
593int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr);
594
595struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
596 u64 address, bool check_children);
597int acpi_is_root_bridge(acpi_handle);
598struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
599
600int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
601int acpi_disable_wakeup_device_power(struct acpi_device *dev);
602
603#ifdef CONFIG_X86
604bool acpi_device_always_present(struct acpi_device *adev);
605#else
606static inline bool acpi_device_always_present(struct acpi_device *adev)
607{
608 return false;
609}
610#endif
611
612#ifdef CONFIG_PM
613void acpi_pm_wakeup_event(struct device *dev);
614acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
615 void (*func)(struct acpi_device_wakeup_context *context));
616acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
617bool acpi_pm_device_can_wakeup(struct device *dev);
618int acpi_pm_device_sleep_state(struct device *, int *, int);
619int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
620int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable);
621#else
622static inline void acpi_pm_wakeup_event(struct device *dev)
623{
624}
625static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
626 struct device *dev,
627 void (*func)(struct acpi_device_wakeup_context *context))
628{
629 return AE_SUPPORT;
630}
631static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
632{
633 return AE_SUPPORT;
634}
635static inline bool acpi_pm_device_can_wakeup(struct device *dev)
636{
637 return false;
638}
639static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
640{
641 if (p)
642 *p = ACPI_STATE_D0;
643
644 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
645 m : ACPI_STATE_D0;
646}
647static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
648{
649 return -ENODEV;
650}
651static inline int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable)
652{
653 return -ENODEV;
654}
655#endif
656
657#ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT
658bool acpi_sleep_state_supported(u8 sleep_state);
659#else
660static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; }
661#endif
662
663#ifdef CONFIG_ACPI_SLEEP
664u32 acpi_target_system_state(void);
665#else
666static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
667#endif
668
669static inline bool acpi_device_power_manageable(struct acpi_device *adev)
670{
671 return adev->flags.power_manageable;
672}
673
674static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
675{
676 return adev->wakeup.flags.valid;
677}
678
679static 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
686static inline void acpi_dev_put(struct acpi_device *adev)
687{
688 put_device(&adev->dev);
689}
690#else /* CONFIG_ACPI */
691
692static inline int register_acpi_bus_type(void *bus) { return 0; }
693static inline int unregister_acpi_bus_type(void *bus) { return 0; }
694
695#endif /* CONFIG_ACPI */
696
697#endif /*__ACPI_BUS_H__*/
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
17struct acpi_handle_list {
18 u32 count;
19 acpi_handle handles[ACPI_MAX_HANDLES];
20};
21
22/* acpi_utils.h */
23acpi_status
24acpi_extract_package(union acpi_object *package,
25 struct acpi_buffer *format, struct acpi_buffer *buffer);
26acpi_status
27acpi_evaluate_integer(acpi_handle handle,
28 acpi_string pathname,
29 struct acpi_object_list *arguments, unsigned long long *data);
30acpi_status
31acpi_evaluate_reference(acpi_handle handle,
32 acpi_string pathname,
33 struct acpi_object_list *arguments,
34 struct acpi_handle_list *list);
35acpi_status
36acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
37 struct acpi_buffer *status_buf);
38
39acpi_status
40acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
41
42bool acpi_has_method(acpi_handle handle, char *name);
43acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
44 u64 arg);
45acpi_status acpi_evaluate_ej0(acpi_handle handle);
46acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
47acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function);
48bool acpi_ata_match(acpi_handle handle);
49bool acpi_bay_match(acpi_handle handle);
50bool acpi_dock_match(acpi_handle handle);
51
52bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs);
53union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
54 u64 rev, u64 func, union acpi_object *argv4);
55
56static inline union acpi_object *
57acpi_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
79bool acpi_dev_found(const char *hid);
80bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
81bool acpi_reduced_hardware(void);
82
83#ifdef CONFIG_ACPI
84
85struct proc_dir_entry;
86
87#define ACPI_BUS_FILE_ROOT "acpi"
88extern struct proc_dir_entry *acpi_root_dir;
89
90enum 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
101struct acpi_driver;
102struct acpi_device;
103
104/*
105 * ACPI Scan Handler
106 * -----------------
107 */
108
109struct 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
117static 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
123struct 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
139struct 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
151typedef int (*acpi_op_add) (struct acpi_device * device);
152typedef int (*acpi_op_remove) (struct acpi_device * device);
153typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
154
155struct 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
163struct 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
180struct 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
191struct 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
210struct 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
218typedef char acpi_bus_id[8];
219typedef u64 acpi_bus_address;
220typedef char acpi_device_name[40];
221typedef char acpi_device_class[20];
222
223struct acpi_hardware_id {
224 struct list_head list;
225 const char *id;
226};
227
228struct acpi_pnp_type {
229 u32 hardware_id:1;
230 u32 bus_address:1;
231 u32 platform_id:1;
232 u32 reserved:29;
233};
234
235struct 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)
249const 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
256struct 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
266struct 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
277struct 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
283struct acpi_dep_data {
284 struct list_head node;
285 acpi_handle supplier;
286 acpi_handle consumer;
287};
288
289/* Performance Management */
290
291struct acpi_device_perf_flags {
292 u8 reserved:8;
293};
294
295struct acpi_device_perf_state {
296 struct {
297 u8 valid:1;
298 u8 reserved:7;
299 } flags;
300 u8 power; /* % Power (compared to P0) */
301 u8 performance; /* % Performance ( " ) */
302 int latency; /* Px->P0 time (microseconds) */
303};
304
305struct acpi_device_perf {
306 int state;
307 struct acpi_device_perf_flags flags;
308 int state_count;
309 struct acpi_device_perf_state *states;
310};
311
312/* Wakeup Management */
313struct acpi_device_wakeup_flags {
314 u8 valid:1; /* Can successfully enable wakeup? */
315 u8 notifier_present:1; /* Wake-up notify handler has been installed */
316};
317
318struct acpi_device_wakeup_context {
319 void (*func)(struct acpi_device_wakeup_context *context);
320 struct device *dev;
321};
322
323struct acpi_device_wakeup {
324 acpi_handle gpe_device;
325 u64 gpe_number;
326 u64 sleep_state;
327 struct list_head resources;
328 struct acpi_device_wakeup_flags flags;
329 struct acpi_device_wakeup_context context;
330 struct wakeup_source *ws;
331 int prepare_count;
332 int enable_count;
333};
334
335struct acpi_device_physical_node {
336 unsigned int node_id;
337 struct list_head node;
338 struct device *dev;
339 bool put_online:1;
340};
341
342struct acpi_device_properties {
343 const guid_t *guid;
344 const union acpi_object *properties;
345 struct list_head list;
346};
347
348/* ACPI Device Specific Data (_DSD) */
349struct acpi_device_data {
350 const union acpi_object *pointer;
351 struct list_head properties;
352 const union acpi_object *of_compatible;
353 struct list_head subnodes;
354};
355
356struct acpi_gpio_mapping;
357
358/* Device */
359struct acpi_device {
360 int device_type;
361 acpi_handle handle; /* no handle for fixed hardware */
362 struct fwnode_handle fwnode;
363 struct acpi_device *parent;
364 struct list_head children;
365 struct list_head node;
366 struct list_head wakeup_list;
367 struct list_head del_list;
368 struct acpi_device_status status;
369 struct acpi_device_flags flags;
370 struct acpi_device_pnp pnp;
371 struct acpi_device_power power;
372 struct acpi_device_wakeup wakeup;
373 struct acpi_device_perf performance;
374 struct acpi_device_dir dir;
375 struct acpi_device_data data;
376 struct acpi_scan_handler *handler;
377 struct acpi_hotplug_context *hp;
378 struct acpi_driver *driver;
379 const struct acpi_gpio_mapping *driver_gpios;
380 void *driver_data;
381 struct device dev;
382 unsigned int physical_node_count;
383 unsigned int dep_unmet;
384 struct list_head physical_node_list;
385 struct mutex physical_node_lock;
386 void (*remove)(struct acpi_device *);
387};
388
389/* Non-device subnode */
390struct acpi_data_node {
391 const char *name;
392 acpi_handle handle;
393 struct fwnode_handle fwnode;
394 struct fwnode_handle *parent;
395 struct acpi_device_data data;
396 struct list_head sibling;
397 struct kobject kobj;
398 struct completion kobj_done;
399};
400
401extern const struct fwnode_operations acpi_device_fwnode_ops;
402extern const struct fwnode_operations acpi_data_fwnode_ops;
403extern const struct fwnode_operations acpi_static_fwnode_ops;
404
405bool is_acpi_device_node(const struct fwnode_handle *fwnode);
406bool is_acpi_data_node(const struct fwnode_handle *fwnode);
407
408static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
409{
410 return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
411}
412
413#define to_acpi_device_node(__fwnode) \
414 ({ \
415 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
416 \
417 is_acpi_device_node(__to_acpi_device_node_fwnode) ? \
418 container_of(__to_acpi_device_node_fwnode, \
419 struct acpi_device, fwnode) : \
420 NULL; \
421 })
422
423#define to_acpi_data_node(__fwnode) \
424 ({ \
425 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
426 \
427 is_acpi_data_node(__to_acpi_data_node_fwnode) ? \
428 container_of(__to_acpi_data_node_fwnode, \
429 struct acpi_data_node, fwnode) : \
430 NULL; \
431 })
432
433static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
434{
435 return !IS_ERR_OR_NULL(fwnode) &&
436 fwnode->ops == &acpi_static_fwnode_ops;
437}
438
439static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
440 const char *name)
441{
442 return is_acpi_data_node(fwnode) ?
443 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
444}
445
446static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
447{
448 return &adev->fwnode;
449}
450
451static inline void *acpi_driver_data(struct acpi_device *d)
452{
453 return d->driver_data;
454}
455
456#define to_acpi_device(d) container_of(d, struct acpi_device, dev)
457#define to_acpi_driver(d) container_of(d, struct acpi_driver, drv)
458
459static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
460{
461 *((u32 *)&adev->status) = sta;
462}
463
464static inline void acpi_set_hp_context(struct acpi_device *adev,
465 struct acpi_hotplug_context *hp)
466{
467 hp->self = adev;
468 adev->hp = hp;
469}
470
471void acpi_initialize_hp_context(struct acpi_device *adev,
472 struct acpi_hotplug_context *hp,
473 int (*notify)(struct acpi_device *, u32),
474 void (*uevent)(struct acpi_device *, u32));
475
476/* acpi_device.dev.bus == &acpi_bus_type */
477extern struct bus_type acpi_bus_type;
478
479/*
480 * Events
481 * ------
482 */
483
484struct acpi_bus_event {
485 struct list_head node;
486 acpi_device_class device_class;
487 acpi_bus_id bus_id;
488 u32 type;
489 u32 data;
490};
491
492extern struct kobject *acpi_kobj;
493extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
494void acpi_bus_private_data_handler(acpi_handle, void *);
495int acpi_bus_get_private_data(acpi_handle, void **);
496int acpi_bus_attach_private_data(acpi_handle, void *);
497void acpi_bus_detach_private_data(acpi_handle);
498extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
499extern int register_acpi_notifier(struct notifier_block *);
500extern int unregister_acpi_notifier(struct notifier_block *);
501
502/*
503 * External Functions
504 */
505
506int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
507acpi_status acpi_bus_get_status_handle(acpi_handle handle,
508 unsigned long long *sta);
509int acpi_bus_get_status(struct acpi_device *device);
510
511int acpi_bus_set_power(acpi_handle handle, int state);
512const char *acpi_power_state_string(int state);
513int acpi_device_set_power(struct acpi_device *device, int state);
514int acpi_bus_init_power(struct acpi_device *device);
515int acpi_device_fix_up_power(struct acpi_device *device);
516int acpi_bus_update_power(acpi_handle handle, int *state_p);
517int acpi_device_update_power(struct acpi_device *device, int *state_p);
518bool acpi_bus_power_manageable(acpi_handle handle);
519int acpi_device_power_add_dependent(struct acpi_device *adev,
520 struct device *dev);
521void acpi_device_power_remove_dependent(struct acpi_device *adev,
522 struct device *dev);
523
524#ifdef CONFIG_PM
525bool acpi_bus_can_wakeup(acpi_handle handle);
526#else
527static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
528#endif
529
530void acpi_scan_lock_acquire(void);
531void acpi_scan_lock_release(void);
532void acpi_lock_hp_context(void);
533void acpi_unlock_hp_context(void);
534int acpi_scan_add_handler(struct acpi_scan_handler *handler);
535int acpi_bus_register_driver(struct acpi_driver *driver);
536void acpi_bus_unregister_driver(struct acpi_driver *driver);
537int acpi_bus_scan(acpi_handle handle);
538void acpi_bus_trim(struct acpi_device *start);
539acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
540int acpi_match_device_ids(struct acpi_device *device,
541 const struct acpi_device_id *ids);
542void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
543 char *modalias, size_t len);
544int acpi_create_dir(struct acpi_device *);
545void acpi_remove_dir(struct acpi_device *);
546
547static inline bool acpi_device_enumerated(struct acpi_device *adev)
548{
549 return adev && adev->flags.initialized && adev->flags.visited;
550}
551
552/**
553 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
554 * @__acpi_driver: acpi_driver struct
555 *
556 * Helper macro for ACPI drivers which do not do anything special in module
557 * init/exit. This eliminates a lot of boilerplate. Each module may only
558 * use this macro once, and calling it replaces module_init() and module_exit()
559 */
560#define module_acpi_driver(__acpi_driver) \
561 module_driver(__acpi_driver, acpi_bus_register_driver, \
562 acpi_bus_unregister_driver)
563
564/*
565 * Bind physical devices with ACPI devices
566 */
567struct acpi_bus_type {
568 struct list_head list;
569 const char *name;
570 bool (*match)(struct device *dev);
571 struct acpi_device * (*find_companion)(struct device *);
572 void (*setup)(struct device *);
573 void (*cleanup)(struct device *);
574};
575int register_acpi_bus_type(struct acpi_bus_type *);
576int unregister_acpi_bus_type(struct acpi_bus_type *);
577int acpi_bind_one(struct device *dev, struct acpi_device *adev);
578int acpi_unbind_one(struct device *dev);
579
580struct acpi_pci_root {
581 struct acpi_device * device;
582 struct pci_bus *bus;
583 u16 segment;
584 struct resource secondary; /* downstream bus range */
585
586 u32 osc_support_set; /* _OSC state of support bits */
587 u32 osc_control_set; /* _OSC state of control bits */
588 phys_addr_t mcfg_addr;
589};
590
591/* helper */
592
593bool acpi_dma_supported(const struct acpi_device *adev);
594enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
595int acpi_iommu_fwspec_init(struct device *dev, u32 id,
596 struct fwnode_handle *fwnode,
597 const struct iommu_ops *ops);
598int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
599 u64 *size);
600int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
601 const u32 *input_id);
602static inline int acpi_dma_configure(struct device *dev,
603 enum dev_dma_attr attr)
604{
605 return acpi_dma_configure_id(dev, attr, NULL);
606}
607struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
608 u64 address, bool check_children);
609int acpi_is_root_bridge(acpi_handle);
610struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
611
612int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
613int acpi_disable_wakeup_device_power(struct acpi_device *dev);
614
615#ifdef CONFIG_X86
616bool acpi_device_always_present(struct acpi_device *adev);
617#else
618static inline bool acpi_device_always_present(struct acpi_device *adev)
619{
620 return false;
621}
622#endif
623
624#ifdef CONFIG_PM
625void acpi_pm_wakeup_event(struct device *dev);
626acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
627 void (*func)(struct acpi_device_wakeup_context *context));
628acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
629bool acpi_pm_device_can_wakeup(struct device *dev);
630int acpi_pm_device_sleep_state(struct device *, int *, int);
631int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
632#else
633static inline void acpi_pm_wakeup_event(struct device *dev)
634{
635}
636static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
637 struct device *dev,
638 void (*func)(struct acpi_device_wakeup_context *context))
639{
640 return AE_SUPPORT;
641}
642static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
643{
644 return AE_SUPPORT;
645}
646static inline bool acpi_pm_device_can_wakeup(struct device *dev)
647{
648 return false;
649}
650static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
651{
652 if (p)
653 *p = ACPI_STATE_D0;
654
655 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
656 m : ACPI_STATE_D0;
657}
658static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
659{
660 return -ENODEV;
661}
662#endif
663
664#ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT
665bool acpi_sleep_state_supported(u8 sleep_state);
666#else
667static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; }
668#endif
669
670#ifdef CONFIG_ACPI_SLEEP
671u32 acpi_target_system_state(void);
672#else
673static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
674#endif
675
676static inline bool acpi_device_power_manageable(struct acpi_device *adev)
677{
678 return adev->flags.power_manageable;
679}
680
681static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
682{
683 return adev->wakeup.flags.valid;
684}
685
686static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
687{
688 return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
689 ((acpi_gbl_FADT.header.revision < 6) &&
690 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
691}
692
693bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);
694
695void acpi_dev_clear_dependencies(struct acpi_device *supplier);
696struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier);
697struct acpi_device *
698acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
699struct acpi_device *
700acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);
701
702/**
703 * for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria
704 * @adev: pointer to the matching ACPI device, NULL at the end of the loop
705 * @hid: Hardware ID of the device.
706 * @uid: Unique ID of the device, pass NULL to not check _UID
707 * @hrv: Hardware Revision of the device, pass -1 to not check _HRV
708 *
709 * The caller is responsible for invoking acpi_dev_put() on the returned device.
710 */
711#define for_each_acpi_dev_match(adev, hid, uid, hrv) \
712 for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \
713 adev; \
714 adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv))
715
716static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev)
717{
718 return adev ? to_acpi_device(get_device(&adev->dev)) : NULL;
719}
720
721static inline void acpi_dev_put(struct acpi_device *adev)
722{
723 if (adev)
724 put_device(&adev->dev);
725}
726
727struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
728
729static inline void acpi_bus_put_acpi_device(struct acpi_device *adev)
730{
731 acpi_dev_put(adev);
732}
733#else /* CONFIG_ACPI */
734
735static inline int register_acpi_bus_type(void *bus) { return 0; }
736static inline int unregister_acpi_bus_type(void *bus) { return 0; }
737
738#endif /* CONFIG_ACPI */
739
740#endif /*__ACPI_BUS_H__*/