include/acpi/acpi_bus.h

   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         bool ignore:1;
 104         enum acpi_hotplug_mode mode;
 105 };
 106
 107 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
 108                                                 struct kobject *kobj)
 109 {
 110         return container_of(kobj, struct acpi_hotplug_profile, kobj);
 111 }
 112
 113 struct acpi_scan_handler {
 114         const struct acpi_device_id *ids;
 115         struct list_head list_node;
 116         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
 117         void (*detach)(struct acpi_device *dev);
 118         struct acpi_hotplug_profile hotplug;
 119 };
 120
 121 /*
 122  * ACPI Driver
 123  * -----------
 124  */
 125
 126 typedef int (*acpi_op_add) (struct acpi_device * device);
 127 typedef int (*acpi_op_remove) (struct acpi_device * device);
 128 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
 129
 130 struct acpi_device_ops {
 131         acpi_op_add add;
 132         acpi_op_remove remove;
 133         acpi_op_notify notify;
 134 };
 135
 136 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 137
 138 struct acpi_driver {
 139         char name[80];
 140         char class[80];
 141         const struct acpi_device_id *ids; /* Supported Hardware IDs */
 142         unsigned int flags;
 143         struct acpi_device_ops ops;
 144         struct device_driver drv;
 145         struct module *owner;
 146 };
 147
 148 /*
 149  * ACPI Device
 150  * -----------
 151  */
 152
 153 /* Status (_STA) */
 154
 155 struct acpi_device_status {
 156         u32 present:1;
 157         u32 enabled:1;
 158         u32 show_in_ui:1;
 159         u32 functional:1;
 160         u32 battery_present:1;
 161         u32 reserved:27;
 162 };
 163
 164 /* Flags */
 165
 166 struct acpi_device_flags {
 167         u32 dynamic_status:1;
 168         u32 removable:1;
 169         u32 ejectable:1;
 170         u32 power_manageable:1;
 171         u32 match_driver:1;
 172         u32 reserved:27;
 173 };
 174
 175 /* File System */
 176
 177 struct acpi_device_dir {
 178         struct proc_dir_entry *entry;
 179 };
 180
 181 #define acpi_device_dir(d)      ((d)->dir.entry)
 182
 183 /* Plug and Play */
 184
 185 typedef char acpi_bus_id[8];
 186 typedef unsigned long acpi_bus_address;
 187 typedef char acpi_device_name[40];
 188 typedef char acpi_device_class[20];
 189
 190 struct acpi_hardware_id {
 191         struct list_head list;
 192         char *id;
 193 };
 194
 195 struct acpi_pnp_type {
 196         u32 hardware_id:1;
 197         u32 bus_address:1;
 198         u32 reserved:30;
 199 };
 200
 201 struct acpi_device_pnp {
 202         acpi_bus_id bus_id;             /* Object name */
 203         struct acpi_pnp_type type;      /* ID type */
 204         acpi_bus_address bus_address;   /* _ADR */
 205         char *unique_id;                /* _UID */
 206         struct list_head ids;           /* _HID and _CIDs */
 207         acpi_device_name device_name;   /* Driver-determined */
 208         acpi_device_class device_class; /*        "          */
 209         union acpi_object *str_obj;     /* unicode string for _STR method */
 210         unsigned long sun;              /* _SUN */
 211 };
 212
 213 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 214 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 215 const char *acpi_device_hid(struct acpi_device *device);
 216 #define acpi_device_name(d)     ((d)->pnp.device_name)
 217 #define acpi_device_class(d)    ((d)->pnp.device_class)
 218
 219 /* Power Management */
 220
 221 struct acpi_device_power_flags {
 222         u32 explicit_get:1;     /* _PSC present? */
 223         u32 power_resources:1;  /* Power resources */
 224         u32 inrush_current:1;   /* Serialize Dx->D0 */
 225         u32 power_removed:1;    /* Optimize Dx->D0 */
 226         u32 reserved:28;
 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         struct list_head power_dependent;
 316         void (*remove)(struct acpi_device *);
 317 };
 318
 319 static inline void *acpi_driver_data(struct acpi_device *d)
 320 {
 321         return d->driver_data;
 322 }
 323
 324 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 325 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 326
 327 /* acpi_device.dev.bus == &acpi_bus_type */
 328 extern struct bus_type acpi_bus_type;
 329
 330 /*
 331  * Events
 332  * ------
 333  */
 334
 335 struct acpi_bus_event {
 336         struct list_head node;
 337         acpi_device_class device_class;
 338         acpi_bus_id bus_id;
 339         u32 type;
 340         u32 data;
 341 };
 342
 343 extern struct kobject *acpi_kobj;
 344 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 345 void acpi_bus_private_data_handler(acpi_handle, void *);
 346 int acpi_bus_get_private_data(acpi_handle, void **);
 347 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 348 extern int register_acpi_notifier(struct notifier_block *);
 349 extern int unregister_acpi_notifier(struct notifier_block *);
 350
 351 /*
 352  * External Functions
 353  */
 354
 355 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 356 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 357                                        unsigned long long *sta);
 358 int acpi_bus_get_status(struct acpi_device *device);
 359
 360 int acpi_bus_set_power(acpi_handle handle, int state);
 361 const char *acpi_power_state_string(int state);
 362 int acpi_device_get_power(struct acpi_device *device, int *state);
 363 int acpi_device_set_power(struct acpi_device *device, int state);
 364 int acpi_bus_init_power(struct acpi_device *device);
 365 int acpi_device_fix_up_power(struct acpi_device *device);
 366 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 367 bool acpi_bus_power_manageable(acpi_handle handle);
 368
 369 #ifdef CONFIG_PM
 370 bool acpi_bus_can_wakeup(acpi_handle handle);
 371 #else
 372 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
 373 #endif
 374
 375 void acpi_scan_lock_acquire(void);
 376 void acpi_scan_lock_release(void);
 377 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
 378 int acpi_bus_register_driver(struct acpi_driver *driver);
 379 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 380 int acpi_bus_scan(acpi_handle handle);
 381 void acpi_bus_trim(struct acpi_device *start);
 382 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 383 int acpi_match_device_ids(struct acpi_device *device,
 384                           const struct acpi_device_id *ids);
 385 int acpi_create_dir(struct acpi_device *);
 386 void acpi_remove_dir(struct acpi_device *);
 387
 388 typedef void (*acpi_hp_callback)(void *data, u32 src);
 389
 390 acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src);
 391
 392 /**
 393  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
 394  * @__acpi_driver: acpi_driver struct
 395  *
 396  * Helper macro for ACPI drivers which do not do anything special in module
 397  * init/exit. This eliminates a lot of boilerplate. Each module may only
 398  * use this macro once, and calling it replaces module_init() and module_exit()
 399  */
 400 #define module_acpi_driver(__acpi_driver) \
 401         module_driver(__acpi_driver, acpi_bus_register_driver, \
 402                       acpi_bus_unregister_driver)
 403
 404 /*
 405  * Bind physical devices with ACPI devices
 406  */
 407 struct acpi_bus_type {
 408         struct list_head list;
 409         const char *name;
 410         bool (*match)(struct device *dev);
 411         int (*find_device) (struct device *, acpi_handle *);
 412         void (*setup)(struct device *);
 413         void (*cleanup)(struct device *);
 414 };
 415 int register_acpi_bus_type(struct acpi_bus_type *);
 416 int unregister_acpi_bus_type(struct acpi_bus_type *);
 417
 418 struct acpi_pci_root {
 419         struct acpi_device * device;
 420         struct pci_bus *bus;
 421         u16 segment;
 422         struct resource secondary;      /* downstream bus range */
 423
 424         u32 osc_support_set;    /* _OSC state of support bits */
 425         u32 osc_control_set;    /* _OSC state of control bits */
 426         phys_addr_t mcfg_addr;
 427 };
 428
 429 /* helper */
 430 acpi_handle acpi_find_child(acpi_handle, u64, bool);
 431 static inline acpi_handle acpi_get_child(acpi_handle handle, u64 addr)
 432 {
 433         return acpi_find_child(handle, addr, false);
 434 }
 435 int acpi_is_root_bridge(acpi_handle);
 436 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 437 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)ACPI_HANDLE(dev))
 438
 439 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 440 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 441
 442 #ifdef CONFIG_PM
 443 acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 444                                  acpi_notify_handler handler, void *context);
 445 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
 446                                     acpi_notify_handler handler);
 447 int acpi_pm_device_sleep_state(struct device *, int *, int);
 448 void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev);
 449 void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev);
 450 #else
 451 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 452                                                acpi_notify_handler handler,
 453                                                void *context)
 454 {
 455         return AE_SUPPORT;
 456 }
 457 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
 458                                                   acpi_notify_handler handler)
 459 {
 460         return AE_SUPPORT;
 461 }
 462 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 463 {
 464         if (p)
 465                 *p = ACPI_STATE_D0;
 466
 467         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
 468                 m : ACPI_STATE_D0;
 469 }
 470 static inline void acpi_dev_pm_add_dependent(acpi_handle handle,
 471                                              struct device *depdev) {}
 472 static inline void acpi_dev_pm_remove_dependent(acpi_handle handle,
 473                                                 struct device *depdev) {}
 474 #endif
 475
 476 #ifdef CONFIG_PM_RUNTIME
 477 int __acpi_device_run_wake(struct acpi_device *, bool);
 478 int acpi_pm_device_run_wake(struct device *, bool);
 479 #else
 480 static inline int __acpi_device_run_wake(struct acpi_device *adev, bool en)
 481 {
 482         return -ENODEV;
 483 }
 484 static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
 485 {
 486         return -ENODEV;
 487 }
 488 #endif
 489
 490 #ifdef CONFIG_PM_SLEEP
 491 int __acpi_device_sleep_wake(struct acpi_device *, u32, bool);
 492 int acpi_pm_device_sleep_wake(struct device *, bool);
 493 #else
 494 static inline int __acpi_device_sleep_wake(struct acpi_device *adev,
 495                                            u32 target_state, bool enable)
 496 {
 497         return -ENODEV;
 498 }
 499 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 500 {
 501         return -ENODEV;
 502 }
 503 #endif
 504
 505 #ifdef CONFIG_ACPI_SLEEP
 506 u32 acpi_target_system_state(void);
 507 #else
 508 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
 509 #endif
 510
 511 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
 512 {
 513         return adev->flags.power_manageable;
 514 }
 515
 516 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
 517 {
 518         return adev->wakeup.flags.valid;
 519 }
 520
 521 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
 522 {
 523         return adev->power.states[ACPI_STATE_D3_COLD].flags.os_accessible;
 524 }
 525
 526 #else   /* CONFIG_ACPI */
 527
 528 static inline int register_acpi_bus_type(void *bus) { return 0; }
 529 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 530
 531 #endif                          /* CONFIG_ACPI */
 532
 533 #endif /*__ACPI_BUS_H__*/