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