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 #ifdef CONFIG_ACPI
  60
  61 #include <linux/proc_fs.h>
  62
  63 #define ACPI_BUS_FILE_ROOT      "acpi"
  64 extern struct proc_dir_entry *acpi_root_dir;
  65
  66 enum acpi_bus_removal_type {
  67         ACPI_BUS_REMOVAL_NORMAL = 0,
  68         ACPI_BUS_REMOVAL_EJECT,
  69         ACPI_BUS_REMOVAL_SUPRISE,
  70         ACPI_BUS_REMOVAL_TYPE_COUNT
  71 };
  72
  73 enum acpi_bus_device_type {
  74         ACPI_BUS_TYPE_DEVICE = 0,
  75         ACPI_BUS_TYPE_POWER,
  76         ACPI_BUS_TYPE_PROCESSOR,
  77         ACPI_BUS_TYPE_THERMAL,
  78         ACPI_BUS_TYPE_POWER_BUTTON,
  79         ACPI_BUS_TYPE_SLEEP_BUTTON,
  80         ACPI_BUS_DEVICE_TYPE_COUNT
  81 };
  82
  83 struct acpi_driver;
  84 struct acpi_device;
  85
  86 /*
  87  * ACPI Scan Handler
  88  * -----------------
  89  */
  90
  91 enum acpi_hotplug_mode {
  92         AHM_GENERIC = 0,
  93         AHM_CONTAINER,
  94         AHM_COUNT
  95 };
  96
  97 struct acpi_hotplug_profile {
  98         struct kobject kobj;
  99         bool enabled:1;
 100         enum acpi_hotplug_mode mode;
 101 };
 102
 103 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
 104                                                 struct kobject *kobj)
 105 {
 106         return container_of(kobj, struct acpi_hotplug_profile, kobj);
 107 }
 108
 109 struct acpi_scan_handler {
 110         const struct acpi_device_id *ids;
 111         struct list_head list_node;
 112         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
 113         void (*detach)(struct acpi_device *dev);
 114         struct acpi_hotplug_profile hotplug;
 115 };
 116
 117 /*
 118  * ACPI Driver
 119  * -----------
 120  */
 121
 122 typedef int (*acpi_op_add) (struct acpi_device * device);
 123 typedef int (*acpi_op_remove) (struct acpi_device * device);
 124 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
 125
 126 struct acpi_device_ops {
 127         acpi_op_add add;
 128         acpi_op_remove remove;
 129         acpi_op_notify notify;
 130 };
 131
 132 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 133
 134 struct acpi_driver {
 135         char name[80];
 136         char class[80];
 137         const struct acpi_device_id *ids; /* Supported Hardware IDs */
 138         unsigned int flags;
 139         struct acpi_device_ops ops;
 140         struct device_driver drv;
 141         struct module *owner;
 142 };
 143
 144 /*
 145  * ACPI Device
 146  * -----------
 147  */
 148
 149 /* Status (_STA) */
 150
 151 struct acpi_device_status {
 152         u32 present:1;
 153         u32 enabled:1;
 154         u32 show_in_ui:1;
 155         u32 functional:1;
 156         u32 battery_present:1;
 157         u32 reserved:27;
 158 };
 159
 160 /* Flags */
 161
 162 struct acpi_device_flags {
 163         u32 dynamic_status:1;
 164         u32 removable:1;
 165         u32 ejectable:1;
 166         u32 suprise_removal_ok:1;
 167         u32 power_manageable:1;
 168         u32 performance_manageable:1;
 169         u32 eject_pending:1;
 170         u32 match_driver:1;
 171         u32 reserved:24;
 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 reserved:28;
 226 };
 227
 228 struct acpi_device_power_state {
 229         struct {
 230                 u8 valid:1;
 231                 u8 os_accessible:1;
 232                 u8 explicit_set:1;      /* _PSx present? */
 233                 u8 reserved:6;
 234         } flags;
 235         int power;              /* % Power (compared to D0) */
 236         int latency;            /* Dx->D0 time (microseconds) */
 237         struct list_head resources;     /* Power resources referenced */
 238 };
 239
 240 struct acpi_device_power {
 241         int state;              /* Current state */
 242         struct acpi_device_power_flags flags;
 243         struct acpi_device_power_state states[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
 244 };
 245
 246 /* Performance Management */
 247
 248 struct acpi_device_perf_flags {
 249         u8 reserved:8;
 250 };
 251
 252 struct acpi_device_perf_state {
 253         struct {
 254                 u8 valid:1;
 255                 u8 reserved:7;
 256         } flags;
 257         u8 power;               /* % Power (compared to P0) */
 258         u8 performance;         /* % Performance (    "   ) */
 259         int latency;            /* Px->P0 time (microseconds) */
 260 };
 261
 262 struct acpi_device_perf {
 263         int state;
 264         struct acpi_device_perf_flags flags;
 265         int state_count;
 266         struct acpi_device_perf_state *states;
 267 };
 268
 269 /* Wakeup Management */
 270 struct acpi_device_wakeup_flags {
 271         u8 valid:1;             /* Can successfully enable wakeup? */
 272         u8 run_wake:1;          /* Run-Wake GPE devices */
 273         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
 274 };
 275
 276 struct acpi_device_wakeup {
 277         acpi_handle gpe_device;
 278         u64 gpe_number;
 279         u64 sleep_state;
 280         struct list_head resources;
 281         struct acpi_device_wakeup_flags flags;
 282         int prepare_count;
 283 };
 284
 285 struct acpi_device_physical_node {
 286         u8 node_id;
 287         struct list_head node;
 288         struct device *dev;
 289 };
 290
 291 /* set maximum of physical nodes to 32 for expansibility */
 292 #define ACPI_MAX_PHYSICAL_NODE  32
 293
 294 /* Device */
 295 struct acpi_device {
 296         int device_type;
 297         acpi_handle handle;             /* no handle for fixed hardware */
 298         struct acpi_device *parent;
 299         struct list_head children;
 300         struct list_head node;
 301         struct list_head wakeup_list;
 302         struct acpi_device_status status;
 303         struct acpi_device_flags flags;
 304         struct acpi_device_pnp pnp;
 305         struct acpi_device_power power;
 306         struct acpi_device_wakeup wakeup;
 307         struct acpi_device_perf performance;
 308         struct acpi_device_dir dir;
 309         struct acpi_scan_handler *handler;
 310         struct acpi_driver *driver;
 311         void *driver_data;
 312         struct device dev;
 313         enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 314         u8 physical_node_count;
 315         struct list_head physical_node_list;
 316         struct mutex physical_node_lock;
 317         DECLARE_BITMAP(physical_node_id_bitmap, ACPI_MAX_PHYSICAL_NODE);
 318         struct list_head power_dependent;
 319         void (*remove)(struct acpi_device *);
 320 };
 321
 322 static inline void *acpi_driver_data(struct acpi_device *d)
 323 {
 324         return d->driver_data;
 325 }
 326
 327 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 328 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 329
 330 /* acpi_device.dev.bus == &acpi_bus_type */
 331 extern struct bus_type acpi_bus_type;
 332
 333 /*
 334  * Events
 335  * ------
 336  */
 337
 338 struct acpi_bus_event {
 339         struct list_head node;
 340         acpi_device_class device_class;
 341         acpi_bus_id bus_id;
 342         u32 type;
 343         u32 data;
 344 };
 345
 346 struct acpi_eject_event {
 347         struct acpi_device      *device;
 348         u32             event;
 349 };
 350
 351 struct acpi_hp_work {
 352         struct work_struct work;
 353         acpi_handle handle;
 354         u32 type;
 355         void *context;
 356 };
 357 void alloc_acpi_hp_work(acpi_handle handle, u32 type, void *context,
 358                         void (*func)(struct work_struct *work));
 359
 360 extern struct kobject *acpi_kobj;
 361 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 362 void acpi_bus_private_data_handler(acpi_handle, void *);
 363 int acpi_bus_get_private_data(acpi_handle, void **);
 364 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 365 extern int register_acpi_notifier(struct notifier_block *);
 366 extern int unregister_acpi_notifier(struct notifier_block *);
 367
 368 extern int register_acpi_bus_notifier(struct notifier_block *nb);
 369 extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 370 /*
 371  * External Functions
 372  */
 373
 374 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 375 void acpi_bus_data_handler(acpi_handle handle, void *context);
 376 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 377                                        unsigned long long *sta);
 378 int acpi_bus_get_status(struct acpi_device *device);
 379
 380 int acpi_bus_set_power(acpi_handle handle, int state);
 381 const char *acpi_power_state_string(int state);
 382 int acpi_device_get_power(struct acpi_device *device, int *state);
 383 int acpi_device_set_power(struct acpi_device *device, int state);
 384 int acpi_bus_init_power(struct acpi_device *device);
 385 int acpi_device_fix_up_power(struct acpi_device *device);
 386 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 387 bool acpi_bus_power_manageable(acpi_handle handle);
 388
 389 #ifdef CONFIG_PM
 390 bool acpi_bus_can_wakeup(acpi_handle handle);
 391 #else
 392 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
 393 #endif
 394
 395 #ifdef CONFIG_ACPI_PROC_EVENT
 396 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 397 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 398 int acpi_bus_receive_event(struct acpi_bus_event *event);
 399 #else
 400 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 401         { return 0; }
 402 #endif
 403
 404 void acpi_scan_lock_acquire(void);
 405 void acpi_scan_lock_release(void);
 406 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
 407 int acpi_bus_register_driver(struct acpi_driver *driver);
 408 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 409 int acpi_bus_scan(acpi_handle handle);
 410 void acpi_bus_hot_remove_device(void *context);
 411 void acpi_bus_trim(struct acpi_device *start);
 412 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 413 int acpi_match_device_ids(struct acpi_device *device,
 414                           const struct acpi_device_id *ids);
 415 int acpi_create_dir(struct acpi_device *);
 416 void acpi_remove_dir(struct acpi_device *);
 417
 418
 419 /**
 420  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
 421  * @__acpi_driver: acpi_driver struct
 422  *
 423  * Helper macro for ACPI drivers which do not do anything special in module
 424  * init/exit. This eliminates a lot of boilerplate. Each module may only
 425  * use this macro once, and calling it replaces module_init() and module_exit()
 426  */
 427 #define module_acpi_driver(__acpi_driver) \
 428         module_driver(__acpi_driver, acpi_bus_register_driver, \
 429                       acpi_bus_unregister_driver)
 430
 431 /*
 432  * Bind physical devices with ACPI devices
 433  */
 434 struct acpi_bus_type {
 435         struct list_head list;
 436         const char *name;
 437         bool (*match)(struct device *dev);
 438         int (*find_device) (struct device *, acpi_handle *);
 439         void (*setup)(struct device *);
 440         void (*cleanup)(struct device *);
 441 };
 442 int register_acpi_bus_type(struct acpi_bus_type *);
 443 int unregister_acpi_bus_type(struct acpi_bus_type *);
 444
 445 struct acpi_pci_root {
 446         struct list_head node;
 447         struct acpi_device * device;
 448         struct pci_bus *bus;
 449         u16 segment;
 450         struct resource secondary;      /* downstream bus range */
 451
 452         u32 osc_support_set;    /* _OSC state of support bits */
 453         u32 osc_control_set;    /* _OSC state of control bits */
 454         phys_addr_t mcfg_addr;
 455 };
 456
 457 /* helper */
 458 acpi_handle acpi_get_child(acpi_handle, u64);
 459 int acpi_is_root_bridge(acpi_handle);
 460 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 461 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)ACPI_HANDLE(dev))
 462
 463 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 464 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 465
 466 #ifdef CONFIG_PM
 467 acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 468                                  acpi_notify_handler handler, void *context);
 469 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
 470                                     acpi_notify_handler handler);
 471 int acpi_device_power_state(struct device *dev, struct acpi_device *adev,
 472                             u32 target_state, int d_max_in, int *d_min_p);
 473 int acpi_pm_device_sleep_state(struct device *, int *, int);
 474 void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev);
 475 void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev);
 476 #else
 477 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 478                                                acpi_notify_handler handler,
 479                                                void *context)
 480 {
 481         return AE_SUPPORT;
 482 }
 483 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
 484                                                   acpi_notify_handler handler)
 485 {
 486         return AE_SUPPORT;
 487 }
 488 static inline int __acpi_device_power_state(int m, int *p)
 489 {
 490         if (p)
 491                 *p = ACPI_STATE_D0;
 492         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0;
 493 }
 494 static inline int acpi_device_power_state(struct device *dev,
 495                                           struct acpi_device *adev,
 496                                           u32 target_state, int d_max_in,
 497                                           int *d_min_p)
 498 {
 499         return __acpi_device_power_state(d_max_in, d_min_p);
 500 }
 501 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 502 {
 503         return __acpi_device_power_state(m, p);
 504 }
 505 static inline void acpi_dev_pm_add_dependent(acpi_handle handle,
 506                                              struct device *depdev) {}
 507 static inline void acpi_dev_pm_remove_dependent(acpi_handle handle,
 508                                                 struct device *depdev) {}
 509 #endif
 510
 511 #ifdef CONFIG_PM_RUNTIME
 512 int __acpi_device_run_wake(struct acpi_device *, bool);
 513 int acpi_pm_device_run_wake(struct device *, bool);
 514 #else
 515 static inline int __acpi_device_run_wake(struct acpi_device *adev, bool en)
 516 {
 517         return -ENODEV;
 518 }
 519 static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
 520 {
 521         return -ENODEV;
 522 }
 523 #endif
 524
 525 #ifdef CONFIG_PM_SLEEP
 526 int __acpi_device_sleep_wake(struct acpi_device *, u32, bool);
 527 int acpi_pm_device_sleep_wake(struct device *, bool);
 528 #else
 529 static inline int __acpi_device_sleep_wake(struct acpi_device *adev,
 530                                            u32 target_state, bool enable)
 531 {
 532         return -ENODEV;
 533 }
 534 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 535 {
 536         return -ENODEV;
 537 }
 538 #endif
 539
 540 #ifdef CONFIG_ACPI_SLEEP
 541 u32 acpi_target_system_state(void);
 542 #else
 543 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
 544 #endif
 545
 546 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
 547 {
 548         return adev->flags.power_manageable;
 549 }
 550
 551 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
 552 {
 553         return adev->wakeup.flags.valid;
 554 }
 555
 556 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
 557 {
 558         return adev->power.states[ACPI_STATE_D3_COLD].flags.os_accessible;
 559 }
 560
 561 #else   /* CONFIG_ACPI */
 562
 563 static inline int register_acpi_bus_type(void *bus) { return 0; }
 564 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 565
 566 #endif                          /* CONFIG_ACPI */
 567
 568 #endif /*__ACPI_BUS_H__*/