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 /* TBD: Make dynamic */
  32 #define ACPI_MAX_HANDLES        10
  33 struct acpi_handle_list {
  34         u32 count;
  35         acpi_handle handles[ACPI_MAX_HANDLES];
  36 };
  37
  38 /* acpi_utils.h */
  39 acpi_status
  40 acpi_extract_package(union acpi_object *package,
  41                      struct acpi_buffer *format, struct acpi_buffer *buffer);
  42 acpi_status
  43 acpi_evaluate_integer(acpi_handle handle,
  44                       acpi_string pathname,
  45                       struct acpi_object_list *arguments, unsigned long long *data);
  46 acpi_status
  47 acpi_evaluate_reference(acpi_handle handle,
  48                         acpi_string pathname,
  49                         struct acpi_object_list *arguments,
  50                         struct acpi_handle_list *list);
  51 acpi_status
  52 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
  53                   struct acpi_buffer *status_buf);
  54
  55 acpi_status
  56 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
  57
  58 bool acpi_has_method(acpi_handle handle, char *name);
  59 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
  60                                        u64 arg);
  61 acpi_status acpi_evaluate_ej0(acpi_handle handle);
  62 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
  63 bool acpi_ata_match(acpi_handle handle);
  64 bool acpi_bay_match(acpi_handle handle);
  65 bool acpi_dock_match(acpi_handle handle);
  66
  67 bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, int rev, u64 funcs);
  68 union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
  69                         int rev, int func, union acpi_object *argv4);
  70
  71 static inline union acpi_object *
  72 acpi_evaluate_dsm_typed(acpi_handle handle, const u8 *uuid, int rev, int func,
  73                         union acpi_object *argv4, acpi_object_type type)
  74 {
  75         union acpi_object *obj;
  76
  77         obj = acpi_evaluate_dsm(handle, uuid, rev, func, argv4);
  78         if (obj && obj->type != type) {
  79                 ACPI_FREE(obj);
  80                 obj = NULL;
  81         }
  82
  83         return obj;
  84 }
  85
  86 #define ACPI_INIT_DSM_ARGV4(cnt, eles)                  \
  87         {                                               \
  88           .package.type = ACPI_TYPE_PACKAGE,            \
  89           .package.count = (cnt),                       \
  90           .package.elements = (eles)                    \
  91         }
  92
  93 #ifdef CONFIG_ACPI
  94
  95 #include <linux/proc_fs.h>
  96
  97 #define ACPI_BUS_FILE_ROOT      "acpi"
  98 extern struct proc_dir_entry *acpi_root_dir;
  99
 100 enum acpi_bus_device_type {
 101         ACPI_BUS_TYPE_DEVICE = 0,
 102         ACPI_BUS_TYPE_POWER,
 103         ACPI_BUS_TYPE_PROCESSOR,
 104         ACPI_BUS_TYPE_THERMAL,
 105         ACPI_BUS_TYPE_POWER_BUTTON,
 106         ACPI_BUS_TYPE_SLEEP_BUTTON,
 107         ACPI_BUS_DEVICE_TYPE_COUNT
 108 };
 109
 110 struct acpi_driver;
 111 struct acpi_device;
 112
 113 /*
 114  * ACPI Scan Handler
 115  * -----------------
 116  */
 117
 118 struct acpi_hotplug_profile {
 119         struct kobject kobj;
 120         int (*scan_dependent)(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)(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 no_hotplug:1;
 208         u32 hotplug_notify:1;
 209         u32 is_dock_station:1;
 210         u32 reserved:22;
 211 };
 212
 213 /* File System */
 214
 215 struct acpi_device_dir {
 216         struct proc_dir_entry *entry;
 217 };
 218
 219 #define acpi_device_dir(d)      ((d)->dir.entry)
 220
 221 /* Plug and Play */
 222
 223 typedef char acpi_bus_id[8];
 224 typedef unsigned long acpi_bus_address;
 225 typedef char acpi_device_name[40];
 226 typedef char acpi_device_class[20];
 227
 228 struct acpi_hardware_id {
 229         struct list_head list;
 230         char *id;
 231 };
 232
 233 struct acpi_pnp_type {
 234         u32 hardware_id:1;
 235         u32 bus_address:1;
 236         u32 platform_id:1;
 237         u32 reserved:29;
 238 };
 239
 240 struct acpi_device_pnp {
 241         acpi_bus_id bus_id;             /* Object name */
 242         struct acpi_pnp_type type;      /* ID type */
 243         acpi_bus_address bus_address;   /* _ADR */
 244         char *unique_id;                /* _UID */
 245         struct list_head ids;           /* _HID and _CIDs */
 246         acpi_device_name device_name;   /* Driver-determined */
 247         acpi_device_class device_class; /*        "          */
 248         union acpi_object *str_obj;     /* unicode string for _STR method */
 249         unsigned long sun;              /* _SUN */
 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_name(d)     ((d)->pnp.device_name)
 256 #define acpi_device_class(d)    ((d)->pnp.device_class)
 257
 258 /* Power Management */
 259
 260 struct acpi_device_power_flags {
 261         u32 explicit_get:1;     /* _PSC present? */
 262         u32 power_resources:1;  /* Power resources */
 263         u32 inrush_current:1;   /* Serialize Dx->D0 */
 264         u32 power_removed:1;    /* Optimize Dx->D0 */
 265         u32 ignore_parent:1;    /* Power is independent of parent power state */
 266         u32 dsw_present:1;      /* _DSW present? */
 267         u32 reserved:26;
 268 };
 269
 270 struct acpi_device_power_state {
 271         struct {
 272                 u8 valid:1;
 273                 u8 os_accessible: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 };
 287
 288 /* Performance Management */
 289
 290 struct acpi_device_perf_flags {
 291         u8 reserved:8;
 292 };
 293
 294 struct acpi_device_perf_state {
 295         struct {
 296                 u8 valid:1;
 297                 u8 reserved:7;
 298         } flags;
 299         u8 power;               /* % Power (compared to P0) */
 300         u8 performance;         /* % Performance (    "   ) */
 301         int latency;            /* Px->P0 time (microseconds) */
 302 };
 303
 304 struct acpi_device_perf {
 305         int state;
 306         struct acpi_device_perf_flags flags;
 307         int state_count;
 308         struct acpi_device_perf_state *states;
 309 };
 310
 311 /* Wakeup Management */
 312 struct acpi_device_wakeup_flags {
 313         u8 valid:1;             /* Can successfully enable wakeup? */
 314         u8 run_wake:1;          /* Run-Wake GPE devices */
 315         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
 316 };
 317
 318 struct acpi_device_wakeup {
 319         acpi_handle gpe_device;
 320         u64 gpe_number;
 321         u64 sleep_state;
 322         struct list_head resources;
 323         struct acpi_device_wakeup_flags flags;
 324         int prepare_count;
 325 };
 326
 327 struct acpi_device_physical_node {
 328         unsigned int node_id;
 329         struct list_head node;
 330         struct device *dev;
 331         bool put_online:1;
 332 };
 333
 334 /* Device */
 335 struct acpi_device {
 336         int device_type;
 337         acpi_handle handle;             /* no handle for fixed hardware */
 338         struct acpi_device *parent;
 339         struct list_head children;
 340         struct list_head node;
 341         struct list_head wakeup_list;
 342         struct list_head del_list;
 343         struct acpi_device_status status;
 344         struct acpi_device_flags flags;
 345         struct acpi_device_pnp pnp;
 346         struct acpi_device_power power;
 347         struct acpi_device_wakeup wakeup;
 348         struct acpi_device_perf performance;
 349         struct acpi_device_dir dir;
 350         struct acpi_scan_handler *handler;
 351         struct acpi_hotplug_context *hp;
 352         struct acpi_driver *driver;
 353         void *driver_data;
 354         struct device dev;
 355         unsigned int physical_node_count;
 356         struct list_head physical_node_list;
 357         struct mutex physical_node_lock;
 358         void (*remove)(struct acpi_device *);
 359 };
 360
 361 static inline void *acpi_driver_data(struct acpi_device *d)
 362 {
 363         return d->driver_data;
 364 }
 365
 366 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 367 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 368
 369 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
 370 {
 371         *((u32 *)&adev->status) = sta;
 372 }
 373
 374 static inline void acpi_set_hp_context(struct acpi_device *adev,
 375                                        struct acpi_hotplug_context *hp,
 376                                        int (*notify)(struct acpi_device *, u32),
 377                                        void (*uevent)(struct acpi_device *, u32),
 378                                        void (*fixup)(struct acpi_device *))
 379 {
 380         hp->self = adev;
 381         hp->notify = notify;
 382         hp->uevent = uevent;
 383         hp->fixup = fixup;
 384         adev->hp = hp;
 385 }
 386
 387 void acpi_initialize_hp_context(struct acpi_device *adev,
 388                                 struct acpi_hotplug_context *hp,
 389                                 int (*notify)(struct acpi_device *, u32),
 390                                 void (*uevent)(struct acpi_device *, u32));
 391
 392 /* acpi_device.dev.bus == &acpi_bus_type */
 393 extern struct bus_type acpi_bus_type;
 394
 395 /*
 396  * Events
 397  * ------
 398  */
 399
 400 struct acpi_bus_event {
 401         struct list_head node;
 402         acpi_device_class device_class;
 403         acpi_bus_id bus_id;
 404         u32 type;
 405         u32 data;
 406 };
 407
 408 extern struct kobject *acpi_kobj;
 409 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 410 void acpi_bus_private_data_handler(acpi_handle, void *);
 411 int acpi_bus_get_private_data(acpi_handle, void **);
 412 int acpi_bus_attach_private_data(acpi_handle, void *);
 413 void acpi_bus_detach_private_data(acpi_handle);
 414 void acpi_bus_no_hotplug(acpi_handle handle);
 415 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 416 extern int register_acpi_notifier(struct notifier_block *);
 417 extern int unregister_acpi_notifier(struct notifier_block *);
 418
 419 /*
 420  * External Functions
 421  */
 422
 423 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 424 struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
 425 void acpi_bus_put_acpi_device(struct acpi_device *adev);
 426 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 427                                        unsigned long long *sta);
 428 int acpi_bus_get_status(struct acpi_device *device);
 429
 430 int acpi_bus_set_power(acpi_handle handle, int state);
 431 const char *acpi_power_state_string(int state);
 432 int acpi_device_get_power(struct acpi_device *device, int *state);
 433 int acpi_device_set_power(struct acpi_device *device, int state);
 434 int acpi_bus_init_power(struct acpi_device *device);
 435 int acpi_device_fix_up_power(struct acpi_device *device);
 436 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 437 bool acpi_bus_power_manageable(acpi_handle handle);
 438
 439 #ifdef CONFIG_PM
 440 bool acpi_bus_can_wakeup(acpi_handle handle);
 441 #else
 442 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
 443 #endif
 444
 445 void acpi_scan_lock_acquire(void);
 446 void acpi_scan_lock_release(void);
 447 void acpi_lock_hp_context(void);
 448 void acpi_unlock_hp_context(void);
 449 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
 450 int acpi_bus_register_driver(struct acpi_driver *driver);
 451 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 452 int acpi_bus_scan(acpi_handle handle);
 453 void acpi_bus_trim(struct acpi_device *start);
 454 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 455 int acpi_match_device_ids(struct acpi_device *device,
 456                           const struct acpi_device_id *ids);
 457 int acpi_create_dir(struct acpi_device *);
 458 void acpi_remove_dir(struct acpi_device *);
 459
 460 static inline bool acpi_device_enumerated(struct acpi_device *adev)
 461 {
 462         return adev && adev->flags.initialized && adev->flags.visited;
 463 }
 464
 465 /**
 466  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
 467  * @__acpi_driver: acpi_driver struct
 468  *
 469  * Helper macro for ACPI drivers which do not do anything special in module
 470  * init/exit. This eliminates a lot of boilerplate. Each module may only
 471  * use this macro once, and calling it replaces module_init() and module_exit()
 472  */
 473 #define module_acpi_driver(__acpi_driver) \
 474         module_driver(__acpi_driver, acpi_bus_register_driver, \
 475                       acpi_bus_unregister_driver)
 476
 477 /*
 478  * Bind physical devices with ACPI devices
 479  */
 480 struct acpi_bus_type {
 481         struct list_head list;
 482         const char *name;
 483         bool (*match)(struct device *dev);
 484         struct acpi_device * (*find_companion)(struct device *);
 485         void (*setup)(struct device *);
 486         void (*cleanup)(struct device *);
 487 };
 488 int register_acpi_bus_type(struct acpi_bus_type *);
 489 int unregister_acpi_bus_type(struct acpi_bus_type *);
 490
 491 struct acpi_pci_root {
 492         struct acpi_device * device;
 493         struct pci_bus *bus;
 494         u16 segment;
 495         struct resource secondary;      /* downstream bus range */
 496
 497         u32 osc_support_set;    /* _OSC state of support bits */
 498         u32 osc_control_set;    /* _OSC state of control bits */
 499         phys_addr_t mcfg_addr;
 500 };
 501
 502 /* helper */
 503
 504 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
 505                                            u64 address, bool check_children);
 506 int acpi_is_root_bridge(acpi_handle);
 507 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 508
 509 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 510 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 511
 512 #ifdef CONFIG_PM
 513 acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 514                                  acpi_notify_handler handler, void *context);
 515 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
 516                                     acpi_notify_handler handler);
 517 int acpi_pm_device_sleep_state(struct device *, int *, int);
 518 #else
 519 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 520                                                acpi_notify_handler handler,
 521                                                void *context)
 522 {
 523         return AE_SUPPORT;
 524 }
 525 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
 526                                                   acpi_notify_handler handler)
 527 {
 528         return AE_SUPPORT;
 529 }
 530 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 531 {
 532         if (p)
 533                 *p = ACPI_STATE_D0;
 534
 535         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
 536                 m : ACPI_STATE_D0;
 537 }
 538 #endif
 539
 540 #ifdef CONFIG_PM_RUNTIME
 541 int __acpi_device_run_wake(struct acpi_device *, bool);
 542 int acpi_pm_device_run_wake(struct device *, bool);
 543 #else
 544 static inline int __acpi_device_run_wake(struct acpi_device *adev, bool en)
 545 {
 546         return -ENODEV;
 547 }
 548 static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
 549 {
 550         return -ENODEV;
 551 }
 552 #endif
 553
 554 #ifdef CONFIG_PM_SLEEP
 555 int __acpi_device_sleep_wake(struct acpi_device *, u32, bool);
 556 int acpi_pm_device_sleep_wake(struct device *, bool);
 557 #else
 558 static inline int __acpi_device_sleep_wake(struct acpi_device *adev,
 559                                            u32 target_state, bool enable)
 560 {
 561         return -ENODEV;
 562 }
 563 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 564 {
 565         return -ENODEV;
 566 }
 567 #endif
 568
 569 #ifdef CONFIG_ACPI_SLEEP
 570 u32 acpi_target_system_state(void);
 571 #else
 572 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
 573 #endif
 574
 575 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
 576 {
 577         return adev->flags.power_manageable;
 578 }
 579
 580 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
 581 {
 582         return adev->wakeup.flags.valid;
 583 }
 584
 585 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
 586 {
 587         return adev->power.states[ACPI_STATE_D3_COLD].flags.os_accessible;
 588 }
 589
 590 #else   /* CONFIG_ACPI */
 591
 592 static inline int register_acpi_bus_type(void *bus) { return 0; }
 593 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 594
 595 #endif                          /* CONFIG_ACPI */
 596
 597 #endif /*__ACPI_BUS_H__*/