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 struct acpi_handle_list { 16 u32 count; 17 acpi_handle *handles; 18 }; 19 20 /* acpi_utils.h */ 21 acpi_status 22 acpi_extract_package(union acpi_object *package, 23 struct acpi_buffer *format, struct acpi_buffer *buffer); 24 acpi_status 25 acpi_evaluate_integer(acpi_handle handle, 26 acpi_string pathname, 27 struct acpi_object_list *arguments, unsigned long long *data); 28 bool acpi_evaluate_reference(acpi_handle handle, acpi_string pathname, 29 struct acpi_object_list *arguments, 30 struct acpi_handle_list *list); 31 bool acpi_handle_list_equal(struct acpi_handle_list *list1, 32 struct acpi_handle_list *list2); 33 void acpi_handle_list_replace(struct acpi_handle_list *dst, 34 struct acpi_handle_list *src); 35 void acpi_handle_list_free(struct acpi_handle_list *list); 36 bool acpi_device_dep(acpi_handle target, acpi_handle match); 37 acpi_status 38 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code, 39 struct acpi_buffer *status_buf); 40 41 acpi_status 42 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld); 43 44 bool acpi_has_method(acpi_handle handle, char *name); 45 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, 46 u64 arg); 47 acpi_status acpi_evaluate_ej0(acpi_handle handle); 48 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock); 49 acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function); 50 bool acpi_ata_match(acpi_handle handle); 51 bool acpi_bay_match(acpi_handle handle); 52 bool acpi_dock_match(acpi_handle handle); 53 54 bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs); 55 union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid, 56 u64 rev, u64 func, union acpi_object *argv4); 57 #ifdef CONFIG_ACPI 58 static inline union acpi_object * 59 acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev, 60 u64 func, union acpi_object *argv4, 61 acpi_object_type type) 62 { 63 union acpi_object *obj; 64 65 obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4); 66 if (obj && obj->type != type) { 67 ACPI_FREE(obj); 68 obj = NULL; 69 } 70 71 return obj; 72 } 73 #endif 74 75 #define ACPI_INIT_DSM_ARGV4(cnt, eles) \ 76 { \ 77 .package.type = ACPI_TYPE_PACKAGE, \ 78 .package.count = (cnt), \ 79 .package.elements = (eles) \ 80 } 81 82 bool acpi_dev_found(const char *hid); 83 bool acpi_dev_present(const char *hid, const char *uid, s64 hrv); 84 bool acpi_reduced_hardware(void); 85 86 #ifdef CONFIG_ACPI 87 88 struct proc_dir_entry; 89 90 #define ACPI_BUS_FILE_ROOT "acpi" 91 extern struct proc_dir_entry *acpi_root_dir; 92 93 enum acpi_bus_device_type { 94 ACPI_BUS_TYPE_DEVICE = 0, 95 ACPI_BUS_TYPE_POWER, 96 ACPI_BUS_TYPE_PROCESSOR, 97 ACPI_BUS_TYPE_THERMAL, 98 ACPI_BUS_TYPE_POWER_BUTTON, 99 ACPI_BUS_TYPE_SLEEP_BUTTON, 100 ACPI_BUS_TYPE_ECDT_EC, 101 ACPI_BUS_DEVICE_TYPE_COUNT 102 }; 103 104 struct acpi_driver; 105 struct acpi_device; 106 107 /* 108 * ACPI Scan Handler 109 * ----------------- 110 */ 111 112 struct acpi_hotplug_profile { 113 struct kobject kobj; 114 int (*scan_dependent)(struct acpi_device *adev); 115 void (*notify_online)(struct acpi_device *adev); 116 bool enabled:1; 117 bool demand_offline:1; 118 }; 119 120 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile( 121 struct kobject *kobj) 122 { 123 return container_of(kobj, struct acpi_hotplug_profile, kobj); 124 } 125 126 struct acpi_scan_handler { 127 const struct acpi_device_id *ids; 128 struct list_head list_node; 129 bool (*match)(const char *idstr, const struct acpi_device_id **matchid); 130 int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id); 131 void (*detach)(struct acpi_device *dev); 132 void (*bind)(struct device *phys_dev); 133 void (*unbind)(struct device *phys_dev); 134 struct acpi_hotplug_profile hotplug; 135 }; 136 137 /* 138 * ACPI Hotplug Context 139 * -------------------- 140 */ 141 142 struct acpi_hotplug_context { 143 struct acpi_device *self; 144 int (*notify)(struct acpi_device *, u32); 145 void (*uevent)(struct acpi_device *, u32); 146 void (*fixup)(struct acpi_device *); 147 }; 148 149 /* 150 * ACPI Driver 151 * ----------- 152 */ 153 154 typedef int (*acpi_op_add) (struct acpi_device * device); 155 typedef void (*acpi_op_remove) (struct acpi_device *device); 156 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event); 157 158 struct acpi_device_ops { 159 acpi_op_add add; 160 acpi_op_remove remove; 161 acpi_op_notify notify; 162 }; 163 164 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */ 165 166 struct acpi_driver { 167 char name[80]; 168 char class[80]; 169 const struct acpi_device_id *ids; /* Supported Hardware IDs */ 170 unsigned int flags; 171 struct acpi_device_ops ops; 172 struct device_driver drv; 173 struct module *owner; 174 }; 175 176 /* 177 * ACPI Device 178 * ----------- 179 */ 180 181 /* Status (_STA) */ 182 183 struct acpi_device_status { 184 u32 present:1; 185 u32 enabled:1; 186 u32 show_in_ui:1; 187 u32 functional:1; 188 u32 battery_present:1; 189 u32 reserved:27; 190 }; 191 192 /* Flags */ 193 194 struct acpi_device_flags { 195 u32 dynamic_status:1; 196 u32 removable:1; 197 u32 ejectable:1; 198 u32 power_manageable:1; 199 u32 match_driver:1; 200 u32 initialized:1; 201 u32 visited:1; 202 u32 hotplug_notify:1; 203 u32 is_dock_station:1; 204 u32 of_compatible_ok:1; 205 u32 coherent_dma:1; 206 u32 cca_seen:1; 207 u32 enumeration_by_parent:1; 208 u32 honor_deps:1; 209 u32 reserved:18; 210 }; 211 212 /* File System */ 213 214 struct acpi_device_dir { 215 struct proc_dir_entry *entry; 216 }; 217 218 #define acpi_device_dir(d) ((d)->dir.entry) 219 220 /* Plug and Play */ 221 222 typedef char acpi_bus_id[8]; 223 typedef u64 acpi_bus_address; 224 typedef char acpi_device_name[40]; 225 typedef char acpi_device_class[20]; 226 227 struct acpi_hardware_id { 228 struct list_head list; 229 const char *id; 230 }; 231 232 struct acpi_pnp_type { 233 u32 hardware_id:1; 234 u32 bus_address:1; 235 u32 platform_id:1; 236 u32 backlight:1; 237 u32 reserved:28; 238 }; 239 240 struct acpi_device_pnp { 241 acpi_bus_id bus_id; /* Object name */ 242 int instance_no; /* Instance number of this object */ 243 struct acpi_pnp_type type; /* ID type */ 244 acpi_bus_address bus_address; /* _ADR */ 245 char *unique_id; /* _UID */ 246 struct list_head ids; /* _HID and _CIDs */ 247 acpi_device_name device_name; /* Driver-determined */ 248 acpi_device_class device_class; /* " */ 249 union acpi_object *str_obj; /* unicode string for _STR method */ 250 }; 251 252 #define acpi_device_bid(d) ((d)->pnp.bus_id) 253 #define acpi_device_adr(d) ((d)->pnp.bus_address) 254 const char *acpi_device_hid(struct acpi_device *device); 255 #define acpi_device_uid(d) ((d)->pnp.unique_id) 256 #define acpi_device_name(d) ((d)->pnp.device_name) 257 #define acpi_device_class(d) ((d)->pnp.device_class) 258 259 /* Power Management */ 260 261 struct acpi_device_power_flags { 262 u32 explicit_get:1; /* _PSC present? */ 263 u32 power_resources:1; /* Power resources */ 264 u32 inrush_current:1; /* Serialize Dx->D0 */ 265 u32 power_removed:1; /* Optimize Dx->D0 */ 266 u32 ignore_parent:1; /* Power is independent of parent power state */ 267 u32 dsw_present:1; /* _DSW present? */ 268 u32 reserved:26; 269 }; 270 271 struct acpi_device_power_state { 272 struct { 273 u8 valid:1; 274 u8 explicit_set:1; /* _PSx present? */ 275 u8 reserved:6; 276 } flags; 277 int power; /* % Power (compared to D0) */ 278 int latency; /* Dx->D0 time (microseconds) */ 279 struct list_head resources; /* Power resources referenced */ 280 }; 281 282 struct acpi_device_power { 283 int state; /* Current state */ 284 struct acpi_device_power_flags flags; 285 struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */ 286 u8 state_for_enumeration; /* Deepest power state for enumeration */ 287 }; 288 289 struct acpi_dep_data { 290 struct list_head node; 291 acpi_handle supplier; 292 acpi_handle consumer; 293 bool honor_dep; 294 bool met; 295 bool free_when_met; 296 }; 297 298 /* Performance Management */ 299 300 struct acpi_device_perf_flags { 301 u8 reserved:8; 302 }; 303 304 struct acpi_device_perf_state { 305 struct { 306 u8 valid:1; 307 u8 reserved:7; 308 } flags; 309 u8 power; /* % Power (compared to P0) */ 310 u8 performance; /* % Performance ( " ) */ 311 int latency; /* Px->P0 time (microseconds) */ 312 }; 313 314 struct acpi_device_perf { 315 int state; 316 struct acpi_device_perf_flags flags; 317 int state_count; 318 struct acpi_device_perf_state *states; 319 }; 320 321 /* Wakeup Management */ 322 struct acpi_device_wakeup_flags { 323 u8 valid:1; /* Can successfully enable wakeup? */ 324 u8 notifier_present:1; /* Wake-up notify handler has been installed */ 325 }; 326 327 struct acpi_device_wakeup_context { 328 void (*func)(struct acpi_device_wakeup_context *context); 329 struct device *dev; 330 }; 331 332 struct acpi_device_wakeup { 333 acpi_handle gpe_device; 334 u64 gpe_number; 335 u64 sleep_state; 336 struct list_head resources; 337 struct acpi_device_wakeup_flags flags; 338 struct acpi_device_wakeup_context context; 339 struct wakeup_source *ws; 340 int prepare_count; 341 int enable_count; 342 }; 343 344 struct acpi_device_physical_node { 345 unsigned int node_id; 346 struct list_head node; 347 struct device *dev; 348 bool put_online:1; 349 }; 350 351 struct acpi_device_properties { 352 const guid_t *guid; 353 union acpi_object *properties; 354 struct list_head list; 355 void **bufs; 356 }; 357 358 /* ACPI Device Specific Data (_DSD) */ 359 struct acpi_device_data { 360 const union acpi_object *pointer; 361 struct list_head properties; 362 const union acpi_object *of_compatible; 363 struct list_head subnodes; 364 }; 365 366 struct acpi_gpio_mapping; 367 368 #define ACPI_DEVICE_SWNODE_ROOT 0 369 370 /* 371 * The maximum expected number of CSI-2 data lanes. 372 * 373 * This number is not expected to ever have to be equal to or greater than the 374 * number of bits in an unsigned long variable, but if it needs to be increased 375 * above that limit, code will need to be adjusted accordingly. 376 */ 377 #define ACPI_DEVICE_CSI2_DATA_LANES 8 378 379 #define ACPI_DEVICE_SWNODE_PORT_NAME_LENGTH 8 380 381 enum acpi_device_swnode_dev_props { 382 ACPI_DEVICE_SWNODE_DEV_ROTATION, 383 ACPI_DEVICE_SWNODE_DEV_CLOCK_FREQUENCY, 384 ACPI_DEVICE_SWNODE_DEV_LED_MAX_MICROAMP, 385 ACPI_DEVICE_SWNODE_DEV_FLASH_MAX_MICROAMP, 386 ACPI_DEVICE_SWNODE_DEV_FLASH_MAX_TIMEOUT_US, 387 ACPI_DEVICE_SWNODE_DEV_NUM_OF, 388 ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES 389 }; 390 391 enum acpi_device_swnode_port_props { 392 ACPI_DEVICE_SWNODE_PORT_REG, 393 ACPI_DEVICE_SWNODE_PORT_NUM_OF, 394 ACPI_DEVICE_SWNODE_PORT_NUM_ENTRIES 395 }; 396 397 enum acpi_device_swnode_ep_props { 398 ACPI_DEVICE_SWNODE_EP_REMOTE_EP, 399 ACPI_DEVICE_SWNODE_EP_BUS_TYPE, 400 ACPI_DEVICE_SWNODE_EP_REG, 401 ACPI_DEVICE_SWNODE_EP_CLOCK_LANES, 402 ACPI_DEVICE_SWNODE_EP_DATA_LANES, 403 ACPI_DEVICE_SWNODE_EP_LANE_POLARITIES, 404 /* TX only */ 405 ACPI_DEVICE_SWNODE_EP_LINK_FREQUENCIES, 406 ACPI_DEVICE_SWNODE_EP_NUM_OF, 407 ACPI_DEVICE_SWNODE_EP_NUM_ENTRIES 408 }; 409 410 /* 411 * Each device has a root software node plus two times as many nodes as the 412 * number of CSI-2 ports. 413 */ 414 #define ACPI_DEVICE_SWNODE_PORT(port) (2 * (port) + 1) 415 #define ACPI_DEVICE_SWNODE_EP(endpoint) \ 416 (ACPI_DEVICE_SWNODE_PORT(endpoint) + 1) 417 418 /** 419 * struct acpi_device_software_node_port - MIPI DisCo for Imaging CSI-2 port 420 * @port_name: Port name. 421 * @data_lanes: "data-lanes" property values. 422 * @lane_polarities: "lane-polarities" property values. 423 * @link_frequencies: "link_frequencies" property values. 424 * @port_nr: Port number. 425 * @crs_crs2_local: _CRS CSI2 record present (i.e. this is a transmitter one). 426 * @port_props: Port properties. 427 * @ep_props: Endpoint properties. 428 * @remote_ep: Reference to the remote endpoint. 429 */ 430 struct acpi_device_software_node_port { 431 char port_name[ACPI_DEVICE_SWNODE_PORT_NAME_LENGTH + 1]; 432 u32 data_lanes[ACPI_DEVICE_CSI2_DATA_LANES]; 433 u32 lane_polarities[ACPI_DEVICE_CSI2_DATA_LANES + 1 /* clock lane */]; 434 u64 link_frequencies[ACPI_DEVICE_CSI2_DATA_LANES]; 435 unsigned int port_nr; 436 bool crs_csi2_local; 437 438 struct property_entry port_props[ACPI_DEVICE_SWNODE_PORT_NUM_ENTRIES]; 439 struct property_entry ep_props[ACPI_DEVICE_SWNODE_EP_NUM_ENTRIES]; 440 441 struct software_node_ref_args remote_ep[1]; 442 }; 443 444 /** 445 * struct acpi_device_software_nodes - Software nodes for an ACPI device 446 * @dev_props: Device properties. 447 * @nodes: Software nodes for root as well as ports and endpoints. 448 * @nodeprts: Array of software node pointers, for (un)registering them. 449 * @ports: Information related to each port and endpoint within a port. 450 * @num_ports: The number of ports. 451 */ 452 struct acpi_device_software_nodes { 453 struct property_entry dev_props[ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES]; 454 struct software_node *nodes; 455 const struct software_node **nodeptrs; 456 struct acpi_device_software_node_port *ports; 457 unsigned int num_ports; 458 }; 459 460 /* Device */ 461 struct acpi_device { 462 u32 pld_crc; 463 int device_type; 464 acpi_handle handle; /* no handle for fixed hardware */ 465 struct fwnode_handle fwnode; 466 struct list_head wakeup_list; 467 struct list_head del_list; 468 struct acpi_device_status status; 469 struct acpi_device_flags flags; 470 struct acpi_device_pnp pnp; 471 struct acpi_device_power power; 472 struct acpi_device_wakeup wakeup; 473 struct acpi_device_perf performance; 474 struct acpi_device_dir dir; 475 struct acpi_device_data data; 476 struct acpi_scan_handler *handler; 477 struct acpi_hotplug_context *hp; 478 struct acpi_device_software_nodes *swnodes; 479 const struct acpi_gpio_mapping *driver_gpios; 480 void *driver_data; 481 struct device dev; 482 unsigned int physical_node_count; 483 unsigned int dep_unmet; 484 struct list_head physical_node_list; 485 struct mutex physical_node_lock; 486 void (*remove)(struct acpi_device *); 487 }; 488 489 /* Non-device subnode */ 490 struct acpi_data_node { 491 const char *name; 492 acpi_handle handle; 493 struct fwnode_handle fwnode; 494 struct fwnode_handle *parent; 495 struct acpi_device_data data; 496 struct list_head sibling; 497 struct kobject kobj; 498 struct completion kobj_done; 499 }; 500 501 extern const struct fwnode_operations acpi_device_fwnode_ops; 502 extern const struct fwnode_operations acpi_data_fwnode_ops; 503 extern const struct fwnode_operations acpi_static_fwnode_ops; 504 505 bool is_acpi_device_node(const struct fwnode_handle *fwnode); 506 bool is_acpi_data_node(const struct fwnode_handle *fwnode); 507 508 static inline bool is_acpi_node(const struct fwnode_handle *fwnode) 509 { 510 return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode)); 511 } 512 513 #define to_acpi_device_node(__fwnode) \ 514 ({ \ 515 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \ 516 \ 517 is_acpi_device_node(__to_acpi_device_node_fwnode) ? \ 518 container_of(__to_acpi_device_node_fwnode, \ 519 struct acpi_device, fwnode) : \ 520 NULL; \ 521 }) 522 523 #define to_acpi_data_node(__fwnode) \ 524 ({ \ 525 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \ 526 \ 527 is_acpi_data_node(__to_acpi_data_node_fwnode) ? \ 528 container_of(__to_acpi_data_node_fwnode, \ 529 struct acpi_data_node, fwnode) : \ 530 NULL; \ 531 }) 532 533 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode) 534 { 535 return !IS_ERR_OR_NULL(fwnode) && 536 fwnode->ops == &acpi_static_fwnode_ops; 537 } 538 539 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode, 540 const char *name) 541 { 542 return is_acpi_data_node(fwnode) ? 543 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false; 544 } 545 546 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) 547 { 548 return &adev->fwnode; 549 } 550 551 static inline void *acpi_driver_data(struct acpi_device *d) 552 { 553 return d->driver_data; 554 } 555 556 #define to_acpi_device(d) container_of(d, struct acpi_device, dev) 557 #define to_acpi_driver(d) container_of(d, struct acpi_driver, drv) 558 559 static inline struct acpi_device *acpi_dev_parent(struct acpi_device *adev) 560 { 561 if (adev->dev.parent) 562 return to_acpi_device(adev->dev.parent); 563 564 return NULL; 565 } 566 567 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta) 568 { 569 *((u32 *)&adev->status) = sta; 570 } 571 572 static inline void acpi_set_hp_context(struct acpi_device *adev, 573 struct acpi_hotplug_context *hp) 574 { 575 hp->self = adev; 576 adev->hp = hp; 577 } 578 579 void acpi_initialize_hp_context(struct acpi_device *adev, 580 struct acpi_hotplug_context *hp, 581 int (*notify)(struct acpi_device *, u32), 582 void (*uevent)(struct acpi_device *, u32)); 583 584 /* acpi_device.dev.bus == &acpi_bus_type */ 585 extern const struct bus_type acpi_bus_type; 586 587 int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data); 588 int acpi_dev_for_each_child(struct acpi_device *adev, 589 int (*fn)(struct acpi_device *, void *), void *data); 590 int acpi_dev_for_each_child_reverse(struct acpi_device *adev, 591 int (*fn)(struct acpi_device *, void *), 592 void *data); 593 594 /* 595 * Events 596 * ------ 597 */ 598 599 struct acpi_bus_event { 600 struct list_head node; 601 acpi_device_class device_class; 602 acpi_bus_id bus_id; 603 u32 type; 604 u32 data; 605 }; 606 607 extern struct kobject *acpi_kobj; 608 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); 609 void acpi_bus_private_data_handler(acpi_handle, void *); 610 int acpi_bus_get_private_data(acpi_handle, void **); 611 int acpi_bus_attach_private_data(acpi_handle, void *); 612 void acpi_bus_detach_private_data(acpi_handle); 613 int acpi_dev_install_notify_handler(struct acpi_device *adev, 614 u32 handler_type, 615 acpi_notify_handler handler, void *context); 616 void acpi_dev_remove_notify_handler(struct acpi_device *adev, 617 u32 handler_type, 618 acpi_notify_handler handler); 619 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); 620 extern int register_acpi_notifier(struct notifier_block *); 621 extern int unregister_acpi_notifier(struct notifier_block *); 622 623 /* 624 * External Functions 625 */ 626 627 acpi_status acpi_bus_get_status_handle(acpi_handle handle, 628 unsigned long long *sta); 629 int acpi_bus_get_status(struct acpi_device *device); 630 631 int acpi_bus_set_power(acpi_handle handle, int state); 632 const char *acpi_power_state_string(int state); 633 int acpi_device_set_power(struct acpi_device *device, int state); 634 int acpi_bus_init_power(struct acpi_device *device); 635 int acpi_device_fix_up_power(struct acpi_device *device); 636 void acpi_device_fix_up_power_extended(struct acpi_device *adev); 637 void acpi_device_fix_up_power_children(struct acpi_device *adev); 638 int acpi_bus_update_power(acpi_handle handle, int *state_p); 639 int acpi_device_update_power(struct acpi_device *device, int *state_p); 640 bool acpi_bus_power_manageable(acpi_handle handle); 641 void acpi_dev_power_up_children_with_adr(struct acpi_device *adev); 642 u8 acpi_dev_power_state_for_wake(struct acpi_device *adev); 643 int acpi_device_power_add_dependent(struct acpi_device *adev, 644 struct device *dev); 645 void acpi_device_power_remove_dependent(struct acpi_device *adev, 646 struct device *dev); 647 648 #ifdef CONFIG_PM 649 bool acpi_bus_can_wakeup(acpi_handle handle); 650 #else 651 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; } 652 #endif 653 654 void acpi_scan_lock_acquire(void); 655 void acpi_scan_lock_release(void); 656 void acpi_lock_hp_context(void); 657 void acpi_unlock_hp_context(void); 658 int acpi_scan_add_handler(struct acpi_scan_handler *handler); 659 int acpi_bus_register_driver(struct acpi_driver *driver); 660 void acpi_bus_unregister_driver(struct acpi_driver *driver); 661 int acpi_bus_scan(acpi_handle handle); 662 void acpi_bus_trim(struct acpi_device *start); 663 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd); 664 int acpi_match_device_ids(struct acpi_device *device, 665 const struct acpi_device_id *ids); 666 void acpi_set_modalias(struct acpi_device *adev, const char *default_id, 667 char *modalias, size_t len); 668 669 static inline bool acpi_device_enumerated(struct acpi_device *adev) 670 { 671 return adev && adev->flags.initialized && adev->flags.visited; 672 } 673 674 /** 675 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver 676 * @__acpi_driver: acpi_driver struct 677 * 678 * Helper macro for ACPI drivers which do not do anything special in module 679 * init/exit. This eliminates a lot of boilerplate. Each module may only 680 * use this macro once, and calling it replaces module_init() and module_exit() 681 */ 682 #define module_acpi_driver(__acpi_driver) \ 683 module_driver(__acpi_driver, acpi_bus_register_driver, \ 684 acpi_bus_unregister_driver) 685 686 /* 687 * Bind physical devices with ACPI devices 688 */ 689 struct acpi_bus_type { 690 struct list_head list; 691 const char *name; 692 bool (*match)(struct device *dev); 693 struct acpi_device * (*find_companion)(struct device *); 694 void (*setup)(struct device *); 695 }; 696 int register_acpi_bus_type(struct acpi_bus_type *); 697 int unregister_acpi_bus_type(struct acpi_bus_type *); 698 int acpi_bind_one(struct device *dev, struct acpi_device *adev); 699 int acpi_unbind_one(struct device *dev); 700 701 enum acpi_bridge_type { 702 ACPI_BRIDGE_TYPE_PCIE = 1, 703 ACPI_BRIDGE_TYPE_CXL, 704 }; 705 706 struct acpi_pci_root { 707 struct acpi_device * device; 708 struct pci_bus *bus; 709 u16 segment; 710 int bridge_type; 711 struct resource secondary; /* downstream bus range */ 712 713 u32 osc_support_set; /* _OSC state of support bits */ 714 u32 osc_control_set; /* _OSC state of control bits */ 715 u32 osc_ext_support_set; /* _OSC state of extended support bits */ 716 u32 osc_ext_control_set; /* _OSC state of extended control bits */ 717 phys_addr_t mcfg_addr; 718 }; 719 720 /* helper */ 721 722 struct iommu_ops; 723 724 bool acpi_dma_supported(const struct acpi_device *adev); 725 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); 726 int acpi_iommu_fwspec_init(struct device *dev, u32 id, 727 struct fwnode_handle *fwnode, 728 const struct iommu_ops *ops); 729 int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map); 730 int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, 731 const u32 *input_id); 732 static inline int acpi_dma_configure(struct device *dev, 733 enum dev_dma_attr attr) 734 { 735 return acpi_dma_configure_id(dev, attr, NULL); 736 } 737 struct acpi_device *acpi_find_child_device(struct acpi_device *parent, 738 u64 address, bool check_children); 739 struct acpi_device *acpi_find_child_by_adr(struct acpi_device *adev, 740 acpi_bus_address adr); 741 int acpi_is_root_bridge(acpi_handle); 742 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle); 743 744 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state); 745 int acpi_disable_wakeup_device_power(struct acpi_device *dev); 746 747 #ifdef CONFIG_X86 748 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status); 749 bool acpi_quirk_skip_acpi_ac_and_battery(void); 750 int acpi_install_cmos_rtc_space_handler(acpi_handle handle); 751 void acpi_remove_cmos_rtc_space_handler(acpi_handle handle); 752 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip); 753 #else 754 static inline bool acpi_device_override_status(struct acpi_device *adev, 755 unsigned long long *status) 756 { 757 return false; 758 } 759 static inline bool acpi_quirk_skip_acpi_ac_and_battery(void) 760 { 761 return false; 762 } 763 static inline int acpi_install_cmos_rtc_space_handler(acpi_handle handle) 764 { 765 return 1; 766 } 767 static inline void acpi_remove_cmos_rtc_space_handler(acpi_handle handle) 768 { 769 } 770 static inline int 771 acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 772 { 773 *skip = false; 774 return 0; 775 } 776 #endif 777 778 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS) 779 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev); 780 bool acpi_quirk_skip_gpio_event_handlers(void); 781 #else 782 static inline bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev) 783 { 784 return false; 785 } 786 static inline bool acpi_quirk_skip_gpio_event_handlers(void) 787 { 788 return false; 789 } 790 #endif 791 792 #ifdef CONFIG_PM 793 void acpi_pm_wakeup_event(struct device *dev); 794 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev, 795 void (*func)(struct acpi_device_wakeup_context *context)); 796 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev); 797 bool acpi_pm_device_can_wakeup(struct device *dev); 798 int acpi_pm_device_sleep_state(struct device *, int *, int); 799 int acpi_pm_set_device_wakeup(struct device *dev, bool enable); 800 #else 801 static inline void acpi_pm_wakeup_event(struct device *dev) 802 { 803 } 804 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, 805 struct device *dev, 806 void (*func)(struct acpi_device_wakeup_context *context)) 807 { 808 return AE_SUPPORT; 809 } 810 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev) 811 { 812 return AE_SUPPORT; 813 } 814 static inline bool acpi_pm_device_can_wakeup(struct device *dev) 815 { 816 return false; 817 } 818 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) 819 { 820 if (p) 821 *p = ACPI_STATE_D0; 822 823 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ? 824 m : ACPI_STATE_D0; 825 } 826 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable) 827 { 828 return -ENODEV; 829 } 830 #endif 831 832 #ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT 833 bool acpi_sleep_state_supported(u8 sleep_state); 834 #else 835 static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; } 836 #endif 837 838 #ifdef CONFIG_ACPI_SLEEP 839 u32 acpi_target_system_state(void); 840 #else 841 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; } 842 #endif 843 844 static inline bool acpi_device_power_manageable(struct acpi_device *adev) 845 { 846 return adev->flags.power_manageable; 847 } 848 849 static inline bool acpi_device_can_wakeup(struct acpi_device *adev) 850 { 851 return adev->wakeup.flags.valid; 852 } 853 854 static inline bool acpi_device_can_poweroff(struct acpi_device *adev) 855 { 856 return adev->power.states[ACPI_STATE_D3_COLD].flags.valid || 857 ((acpi_gbl_FADT.header.revision < 6) && 858 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); 859 } 860 861 int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer); 862 863 static inline bool acpi_dev_hid_match(struct acpi_device *adev, const char *hid2) 864 { 865 const char *hid1 = acpi_device_hid(adev); 866 867 return hid1 && hid2 && !strcmp(hid1, hid2); 868 } 869 870 static inline bool acpi_str_uid_match(struct acpi_device *adev, const char *uid2) 871 { 872 const char *uid1 = acpi_device_uid(adev); 873 874 return uid1 && uid2 && !strcmp(uid1, uid2); 875 } 876 877 static inline bool acpi_int_uid_match(struct acpi_device *adev, u64 uid2) 878 { 879 u64 uid1; 880 881 return !acpi_dev_uid_to_integer(adev, &uid1) && uid1 == uid2; 882 } 883 884 #define TYPE_ENTRY(type, x) \ 885 const type: x, \ 886 type: x 887 888 #define ACPI_STR_TYPES(match) \ 889 TYPE_ENTRY(unsigned char *, match), \ 890 TYPE_ENTRY(signed char *, match), \ 891 TYPE_ENTRY(char *, match), \ 892 TYPE_ENTRY(void *, match) 893 894 /** 895 * acpi_dev_uid_match - Match device by supplied UID 896 * @adev: ACPI device to match. 897 * @uid2: Unique ID of the device. 898 * 899 * Matches UID in @adev with given @uid2. 900 * 901 * Returns: %true if matches, %false otherwise. 902 */ 903 #define acpi_dev_uid_match(adev, uid2) \ 904 _Generic(uid2, \ 905 /* Treat @uid2 as a string for acpi string types */ \ 906 ACPI_STR_TYPES(acpi_str_uid_match), \ 907 /* Treat as an integer otherwise */ \ 908 default: acpi_int_uid_match)(adev, uid2) 909 910 /** 911 * acpi_dev_hid_uid_match - Match device by supplied HID and UID 912 * @adev: ACPI device to match. 913 * @hid2: Hardware ID of the device. 914 * @uid2: Unique ID of the device, pass NULL to not check _UID. 915 * 916 * Matches HID and UID in @adev with given @hid2 and @uid2. Absence of @uid2 917 * will be treated as a match. If user wants to validate @uid2, it should be 918 * done before calling this function. 919 * 920 * Returns: %true if matches or @uid2 is NULL, %false otherwise. 921 */ 922 #define acpi_dev_hid_uid_match(adev, hid2, uid2) \ 923 (acpi_dev_hid_match(adev, hid2) && \ 924 /* Distinguish integer 0 from NULL @uid2 */ \ 925 (_Generic(uid2, ACPI_STR_TYPES(!(uid2)), default: 0) || \ 926 acpi_dev_uid_match(adev, uid2))) 927 928 void acpi_dev_clear_dependencies(struct acpi_device *supplier); 929 bool acpi_dev_ready_for_enumeration(const struct acpi_device *device); 930 struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier, 931 struct acpi_device *start); 932 933 /** 934 * for_each_acpi_consumer_dev - iterate over the consumer ACPI devices for a 935 * given supplier 936 * @supplier: Pointer to the supplier's ACPI device 937 * @consumer: Pointer to &struct acpi_device to hold the consumer, initially NULL 938 */ 939 #define for_each_acpi_consumer_dev(supplier, consumer) \ 940 for (consumer = acpi_dev_get_next_consumer_dev(supplier, NULL); \ 941 consumer; \ 942 consumer = acpi_dev_get_next_consumer_dev(supplier, consumer)) 943 944 struct acpi_device * 945 acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv); 946 struct acpi_device * 947 acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv); 948 949 /** 950 * for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria 951 * @adev: pointer to the matching ACPI device, NULL at the end of the loop 952 * @hid: Hardware ID of the device. 953 * @uid: Unique ID of the device, pass NULL to not check _UID 954 * @hrv: Hardware Revision of the device, pass -1 to not check _HRV 955 * 956 * The caller is responsible for invoking acpi_dev_put() on the returned device. 957 */ 958 #define for_each_acpi_dev_match(adev, hid, uid, hrv) \ 959 for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \ 960 adev; \ 961 adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv)) 962 963 static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev) 964 { 965 return adev ? to_acpi_device(get_device(&adev->dev)) : NULL; 966 } 967 968 static inline void acpi_dev_put(struct acpi_device *adev) 969 { 970 if (adev) 971 put_device(&adev->dev); 972 } 973 974 struct acpi_device *acpi_fetch_acpi_dev(acpi_handle handle); 975 struct acpi_device *acpi_get_acpi_dev(acpi_handle handle); 976 977 static inline void acpi_put_acpi_dev(struct acpi_device *adev) 978 { 979 acpi_dev_put(adev); 980 } 981 #else /* CONFIG_ACPI */ 982 983 static inline int register_acpi_bus_type(void *bus) { return 0; } 984 static inline int unregister_acpi_bus_type(void *bus) { return 0; } 985 986 #endif /* CONFIG_ACPI */ 987 988 #endif /*__ACPI_BUS_H__*/ 989