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 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write to the Free Software Foundation, Inc., 21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #ifndef __ACPI_BUS_H__ 27 #define __ACPI_BUS_H__ 28 29 #include <linux/device.h> 30 31 #include <acpi/acpi.h> 32 33 /* TBD: Make dynamic */ 34 #define ACPI_MAX_HANDLES 10 35 struct acpi_handle_list { 36 u32 count; 37 acpi_handle handles[ACPI_MAX_HANDLES]; 38 }; 39 40 /* acpi_utils.h */ 41 acpi_status 42 acpi_extract_package(union acpi_object *package, 43 struct acpi_buffer *format, struct acpi_buffer *buffer); 44 acpi_status 45 acpi_evaluate_integer(acpi_handle handle, 46 acpi_string pathname, 47 struct acpi_object_list *arguments, unsigned long long *data); 48 acpi_status 49 acpi_evaluate_reference(acpi_handle handle, 50 acpi_string pathname, 51 struct acpi_object_list *arguments, 52 struct acpi_handle_list *list); 53 acpi_status 54 acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event, 55 u32 status_code, struct acpi_buffer *status_buf); 56 57 acpi_status 58 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld); 59 60 bool acpi_has_method(acpi_handle handle, char *name); 61 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, 62 u64 arg); 63 acpi_status acpi_evaluate_ej0(acpi_handle handle); 64 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock); 65 bool acpi_ata_match(acpi_handle handle); 66 bool acpi_bay_match(acpi_handle handle); 67 bool acpi_dock_match(acpi_handle handle); 68 69 #ifdef CONFIG_ACPI 70 71 #include <linux/proc_fs.h> 72 73 #define ACPI_BUS_FILE_ROOT "acpi" 74 extern struct proc_dir_entry *acpi_root_dir; 75 76 enum acpi_bus_device_type { 77 ACPI_BUS_TYPE_DEVICE = 0, 78 ACPI_BUS_TYPE_POWER, 79 ACPI_BUS_TYPE_PROCESSOR, 80 ACPI_BUS_TYPE_THERMAL, 81 ACPI_BUS_TYPE_POWER_BUTTON, 82 ACPI_BUS_TYPE_SLEEP_BUTTON, 83 ACPI_BUS_DEVICE_TYPE_COUNT 84 }; 85 86 struct acpi_driver; 87 struct acpi_device; 88 89 /* 90 * ACPI Scan Handler 91 * ----------------- 92 */ 93 94 enum acpi_hotplug_mode { 95 AHM_GENERIC = 0, 96 AHM_CONTAINER, 97 AHM_COUNT 98 }; 99 100 struct acpi_hotplug_profile { 101 struct kobject kobj; 102 bool enabled:1; 103 enum acpi_hotplug_mode mode; 104 }; 105 106 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile( 107 struct kobject *kobj) 108 { 109 return container_of(kobj, struct acpi_hotplug_profile, kobj); 110 } 111 112 struct acpi_scan_handler { 113 const struct acpi_device_id *ids; 114 struct list_head list_node; 115 int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id); 116 void (*detach)(struct acpi_device *dev); 117 struct acpi_hotplug_profile hotplug; 118 }; 119 120 /* 121 * ACPI Driver 122 * ----------- 123 */ 124 125 typedef int (*acpi_op_add) (struct acpi_device * device); 126 typedef int (*acpi_op_remove) (struct acpi_device * device); 127 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event); 128 129 struct acpi_device_ops { 130 acpi_op_add add; 131 acpi_op_remove remove; 132 acpi_op_notify notify; 133 }; 134 135 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */ 136 137 struct acpi_driver { 138 char name[80]; 139 char class[80]; 140 const struct acpi_device_id *ids; /* Supported Hardware IDs */ 141 unsigned int flags; 142 struct acpi_device_ops ops; 143 struct device_driver drv; 144 struct module *owner; 145 }; 146 147 /* 148 * ACPI Device 149 * ----------- 150 */ 151 152 /* Status (_STA) */ 153 154 struct acpi_device_status { 155 u32 present:1; 156 u32 enabled:1; 157 u32 show_in_ui:1; 158 u32 functional:1; 159 u32 battery_present:1; 160 u32 reserved:27; 161 }; 162 163 /* Flags */ 164 165 struct acpi_device_flags { 166 u32 dynamic_status:1; 167 u32 removable:1; 168 u32 ejectable:1; 169 u32 power_manageable:1; 170 u32 match_driver:1; 171 u32 reserved:27; 172 }; 173 174 /* File System */ 175 176 struct acpi_device_dir { 177 struct proc_dir_entry *entry; 178 }; 179 180 #define acpi_device_dir(d) ((d)->dir.entry) 181 182 /* Plug and Play */ 183 184 typedef char acpi_bus_id[8]; 185 typedef unsigned long acpi_bus_address; 186 typedef char acpi_device_name[40]; 187 typedef char acpi_device_class[20]; 188 189 struct acpi_hardware_id { 190 struct list_head list; 191 char *id; 192 }; 193 194 struct acpi_pnp_type { 195 u32 hardware_id:1; 196 u32 bus_address:1; 197 u32 reserved:30; 198 }; 199 200 struct acpi_device_pnp { 201 acpi_bus_id bus_id; /* Object name */ 202 struct acpi_pnp_type type; /* ID type */ 203 acpi_bus_address bus_address; /* _ADR */ 204 char *unique_id; /* _UID */ 205 struct list_head ids; /* _HID and _CIDs */ 206 acpi_device_name device_name; /* Driver-determined */ 207 acpi_device_class device_class; /* " */ 208 union acpi_object *str_obj; /* unicode string for _STR method */ 209 unsigned long sun; /* _SUN */ 210 }; 211 212 #define acpi_device_bid(d) ((d)->pnp.bus_id) 213 #define acpi_device_adr(d) ((d)->pnp.bus_address) 214 const char *acpi_device_hid(struct acpi_device *device); 215 #define acpi_device_name(d) ((d)->pnp.device_name) 216 #define acpi_device_class(d) ((d)->pnp.device_class) 217 218 /* Power Management */ 219 220 struct acpi_device_power_flags { 221 u32 explicit_get:1; /* _PSC present? */ 222 u32 power_resources:1; /* Power resources */ 223 u32 inrush_current:1; /* Serialize Dx->D0 */ 224 u32 power_removed:1; /* Optimize Dx->D0 */ 225 u32 ignore_parent:1; /* Power is independent of parent power state */ 226 u32 reserved:27; 227 }; 228 229 struct acpi_device_power_state { 230 struct { 231 u8 valid:1; 232 u8 os_accessible:1; 233 u8 explicit_set:1; /* _PSx present? */ 234 u8 reserved:6; 235 } flags; 236 int power; /* % Power (compared to D0) */ 237 int latency; /* Dx->D0 time (microseconds) */ 238 struct list_head resources; /* Power resources referenced */ 239 }; 240 241 struct acpi_device_power { 242 int state; /* Current state */ 243 struct acpi_device_power_flags flags; 244 struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */ 245 }; 246 247 /* Performance Management */ 248 249 struct acpi_device_perf_flags { 250 u8 reserved:8; 251 }; 252 253 struct acpi_device_perf_state { 254 struct { 255 u8 valid:1; 256 u8 reserved:7; 257 } flags; 258 u8 power; /* % Power (compared to P0) */ 259 u8 performance; /* % Performance ( " ) */ 260 int latency; /* Px->P0 time (microseconds) */ 261 }; 262 263 struct acpi_device_perf { 264 int state; 265 struct acpi_device_perf_flags flags; 266 int state_count; 267 struct acpi_device_perf_state *states; 268 }; 269 270 /* Wakeup Management */ 271 struct acpi_device_wakeup_flags { 272 u8 valid:1; /* Can successfully enable wakeup? */ 273 u8 run_wake:1; /* Run-Wake GPE devices */ 274 u8 notifier_present:1; /* Wake-up notify handler has been installed */ 275 }; 276 277 struct acpi_device_wakeup { 278 acpi_handle gpe_device; 279 u64 gpe_number; 280 u64 sleep_state; 281 struct list_head resources; 282 struct acpi_device_wakeup_flags flags; 283 int prepare_count; 284 }; 285 286 struct acpi_device_physical_node { 287 unsigned int node_id; 288 struct list_head node; 289 struct device *dev; 290 bool put_online:1; 291 }; 292 293 /* Device */ 294 struct acpi_device { 295 int device_type; 296 acpi_handle handle; /* no handle for fixed hardware */ 297 struct acpi_device *parent; 298 struct list_head children; 299 struct list_head node; 300 struct list_head wakeup_list; 301 struct acpi_device_status status; 302 struct acpi_device_flags flags; 303 struct acpi_device_pnp pnp; 304 struct acpi_device_power power; 305 struct acpi_device_wakeup wakeup; 306 struct acpi_device_perf performance; 307 struct acpi_device_dir dir; 308 struct acpi_scan_handler *handler; 309 struct acpi_driver *driver; 310 void *driver_data; 311 struct device dev; 312 unsigned int physical_node_count; 313 struct list_head physical_node_list; 314 struct mutex physical_node_lock; 315 void (*remove)(struct acpi_device *); 316 }; 317 318 static inline void *acpi_driver_data(struct acpi_device *d) 319 { 320 return d->driver_data; 321 } 322 323 #define to_acpi_device(d) container_of(d, struct acpi_device, dev) 324 #define to_acpi_driver(d) container_of(d, struct acpi_driver, drv) 325 326 /* acpi_device.dev.bus == &acpi_bus_type */ 327 extern struct bus_type acpi_bus_type; 328 329 /* 330 * Events 331 * ------ 332 */ 333 334 struct acpi_bus_event { 335 struct list_head node; 336 acpi_device_class device_class; 337 acpi_bus_id bus_id; 338 u32 type; 339 u32 data; 340 }; 341 342 extern struct kobject *acpi_kobj; 343 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); 344 void acpi_bus_private_data_handler(acpi_handle, void *); 345 int acpi_bus_get_private_data(acpi_handle, void **); 346 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); 347 extern int register_acpi_notifier(struct notifier_block *); 348 extern int unregister_acpi_notifier(struct notifier_block *); 349 350 /* 351 * External Functions 352 */ 353 354 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device); 355 acpi_status acpi_bus_get_status_handle(acpi_handle handle, 356 unsigned long long *sta); 357 int acpi_bus_get_status(struct acpi_device *device); 358 359 int acpi_bus_set_power(acpi_handle handle, int state); 360 const char *acpi_power_state_string(int state); 361 int acpi_device_get_power(struct acpi_device *device, int *state); 362 int acpi_device_set_power(struct acpi_device *device, int state); 363 int acpi_bus_init_power(struct acpi_device *device); 364 int acpi_device_fix_up_power(struct acpi_device *device); 365 int acpi_bus_update_power(acpi_handle handle, int *state_p); 366 bool acpi_bus_power_manageable(acpi_handle handle); 367 368 #ifdef CONFIG_PM 369 bool acpi_bus_can_wakeup(acpi_handle handle); 370 #else 371 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; } 372 #endif 373 374 void acpi_scan_lock_acquire(void); 375 void acpi_scan_lock_release(void); 376 int acpi_scan_add_handler(struct acpi_scan_handler *handler); 377 int acpi_bus_register_driver(struct acpi_driver *driver); 378 void acpi_bus_unregister_driver(struct acpi_driver *driver); 379 int acpi_bus_scan(acpi_handle handle); 380 void acpi_bus_trim(struct acpi_device *start); 381 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd); 382 int acpi_match_device_ids(struct acpi_device *device, 383 const struct acpi_device_id *ids); 384 int acpi_create_dir(struct acpi_device *); 385 void acpi_remove_dir(struct acpi_device *); 386 387 typedef void (*acpi_hp_callback)(void *data, u32 src); 388 389 acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src); 390 391 /** 392 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver 393 * @__acpi_driver: acpi_driver struct 394 * 395 * Helper macro for ACPI drivers which do not do anything special in module 396 * init/exit. This eliminates a lot of boilerplate. Each module may only 397 * use this macro once, and calling it replaces module_init() and module_exit() 398 */ 399 #define module_acpi_driver(__acpi_driver) \ 400 module_driver(__acpi_driver, acpi_bus_register_driver, \ 401 acpi_bus_unregister_driver) 402 403 /* 404 * Bind physical devices with ACPI devices 405 */ 406 struct acpi_bus_type { 407 struct list_head list; 408 const char *name; 409 bool (*match)(struct device *dev); 410 int (*find_device) (struct device *, acpi_handle *); 411 void (*setup)(struct device *); 412 void (*cleanup)(struct device *); 413 }; 414 int register_acpi_bus_type(struct acpi_bus_type *); 415 int unregister_acpi_bus_type(struct acpi_bus_type *); 416 417 struct acpi_pci_root { 418 struct acpi_device * device; 419 struct pci_bus *bus; 420 u16 segment; 421 struct resource secondary; /* downstream bus range */ 422 423 u32 osc_support_set; /* _OSC state of support bits */ 424 u32 osc_control_set; /* _OSC state of control bits */ 425 phys_addr_t mcfg_addr; 426 }; 427 428 /* helper */ 429 acpi_handle acpi_find_child(acpi_handle, u64, bool); 430 static inline acpi_handle acpi_get_child(acpi_handle handle, u64 addr) 431 { 432 return acpi_find_child(handle, addr, false); 433 } 434 void acpi_preset_companion(struct device *dev, acpi_handle parent, u64 addr); 435 int acpi_is_root_bridge(acpi_handle); 436 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle); 437 438 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state); 439 int acpi_disable_wakeup_device_power(struct acpi_device *dev); 440 441 #ifdef CONFIG_PM 442 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, 443 acpi_notify_handler handler, void *context); 444 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev, 445 acpi_notify_handler handler); 446 int acpi_pm_device_sleep_state(struct device *, int *, int); 447 #else 448 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, 449 acpi_notify_handler handler, 450 void *context) 451 { 452 return AE_SUPPORT; 453 } 454 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev, 455 acpi_notify_handler handler) 456 { 457 return AE_SUPPORT; 458 } 459 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) 460 { 461 if (p) 462 *p = ACPI_STATE_D0; 463 464 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ? 465 m : ACPI_STATE_D0; 466 } 467 #endif 468 469 #ifdef CONFIG_PM_RUNTIME 470 int __acpi_device_run_wake(struct acpi_device *, bool); 471 int acpi_pm_device_run_wake(struct device *, bool); 472 #else 473 static inline int __acpi_device_run_wake(struct acpi_device *adev, bool en) 474 { 475 return -ENODEV; 476 } 477 static inline int acpi_pm_device_run_wake(struct device *dev, bool enable) 478 { 479 return -ENODEV; 480 } 481 #endif 482 483 #ifdef CONFIG_PM_SLEEP 484 int __acpi_device_sleep_wake(struct acpi_device *, u32, bool); 485 int acpi_pm_device_sleep_wake(struct device *, bool); 486 #else 487 static inline int __acpi_device_sleep_wake(struct acpi_device *adev, 488 u32 target_state, bool enable) 489 { 490 return -ENODEV; 491 } 492 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable) 493 { 494 return -ENODEV; 495 } 496 #endif 497 498 #ifdef CONFIG_ACPI_SLEEP 499 u32 acpi_target_system_state(void); 500 #else 501 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; } 502 #endif 503 504 static inline bool acpi_device_power_manageable(struct acpi_device *adev) 505 { 506 return adev->flags.power_manageable; 507 } 508 509 static inline bool acpi_device_can_wakeup(struct acpi_device *adev) 510 { 511 return adev->wakeup.flags.valid; 512 } 513 514 static inline bool acpi_device_can_poweroff(struct acpi_device *adev) 515 { 516 return adev->power.states[ACPI_STATE_D3_COLD].flags.os_accessible; 517 } 518 519 #else /* CONFIG_ACPI */ 520 521 static inline int register_acpi_bus_type(void *bus) { return 0; } 522 static inline int unregister_acpi_bus_type(void *bus) { return 0; } 523 524 #endif /* CONFIG_ACPI */ 525 526 #endif /*__ACPI_BUS_H__*/ 527