include/linux/acpi.h

   1 /*
   2  * acpi.h - ACPI Interface
   3  *
   4  * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   5  *
   6  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  */
  24
  25 #ifndef _LINUX_ACPI_H
  26 #define _LINUX_ACPI_H
  27
  28 #include <linux/errno.h>
  29 #include <linux/ioport.h>       /* for struct resource */
  30 #include <linux/device.h>
  31
  32 #ifdef  CONFIG_ACPI
  33
  34 #ifndef _LINUX
  35 #define _LINUX
  36 #endif
  37
  38 #include <linux/list.h>
  39 #include <linux/mod_devicetable.h>
  40
  41 #include <acpi/acpi.h>
  42 #include <acpi/acpi_bus.h>
  43 #include <acpi/acpi_drivers.h>
  44 #include <acpi/acpi_numa.h>
  45 #include <asm/acpi.h>
  46
  47 static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
  48 {
  49         return adev ? adev->handle : NULL;
  50 }
  51
  52 #define ACPI_COMPANION(dev)             ((dev)->acpi_node.companion)
  53 #define ACPI_COMPANION_SET(dev, adev)   ACPI_COMPANION(dev) = (adev)
  54 #define ACPI_HANDLE(dev)                acpi_device_handle(ACPI_COMPANION(dev))
  55
  56 enum acpi_irq_model_id {
  57         ACPI_IRQ_MODEL_PIC = 0,
  58         ACPI_IRQ_MODEL_IOAPIC,
  59         ACPI_IRQ_MODEL_IOSAPIC,
  60         ACPI_IRQ_MODEL_PLATFORM,
  61         ACPI_IRQ_MODEL_COUNT
  62 };
  63
  64 extern enum acpi_irq_model_id   acpi_irq_model;
  65
  66 enum acpi_interrupt_id {
  67         ACPI_INTERRUPT_PMI      = 1,
  68         ACPI_INTERRUPT_INIT,
  69         ACPI_INTERRUPT_CPEI,
  70         ACPI_INTERRUPT_COUNT
  71 };
  72
  73 #define ACPI_SPACE_MEM          0
  74
  75 enum acpi_address_range_id {
  76         ACPI_ADDRESS_RANGE_MEMORY = 1,
  77         ACPI_ADDRESS_RANGE_RESERVED = 2,
  78         ACPI_ADDRESS_RANGE_ACPI = 3,
  79         ACPI_ADDRESS_RANGE_NVS  = 4,
  80         ACPI_ADDRESS_RANGE_COUNT
  81 };
  82
  83
  84 /* Table Handlers */
  85
  86 typedef int (*acpi_tbl_table_handler)(struct acpi_table_header *table);
  87
  88 typedef int (*acpi_tbl_entry_handler)(struct acpi_subtable_header *header,
  89                                       const unsigned long end);
  90
  91 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
  92 void acpi_initrd_override(void *data, size_t size);
  93 #else
  94 static inline void acpi_initrd_override(void *data, size_t size)
  95 {
  96 }
  97 #endif
  98
  99 char * __acpi_map_table (unsigned long phys_addr, unsigned long size);
 100 void __acpi_unmap_table(char *map, unsigned long size);
 101 int early_acpi_boot_init(void);
 102 int acpi_boot_init (void);
 103 void acpi_boot_table_init (void);
 104 int acpi_mps_check (void);
 105 int acpi_numa_init (void);
 106
 107 int acpi_table_init (void);
 108 int acpi_table_parse(char *id, acpi_tbl_table_handler handler);
 109 int __init acpi_table_parse_entries(char *id, unsigned long table_size,
 110                                     int entry_id,
 111                                     acpi_tbl_entry_handler handler,
 112                                     unsigned int max_entries);
 113 int acpi_table_parse_madt(enum acpi_madt_type id,
 114                           acpi_tbl_entry_handler handler,
 115                           unsigned int max_entries);
 116 int acpi_parse_mcfg (struct acpi_table_header *header);
 117 void acpi_table_print_madt_entry (struct acpi_subtable_header *madt);
 118
 119 /* the following four functions are architecture-dependent */
 120 void acpi_numa_slit_init (struct acpi_table_slit *slit);
 121 void acpi_numa_processor_affinity_init (struct acpi_srat_cpu_affinity *pa);
 122 void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa);
 123 int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
 124 void acpi_numa_arch_fixup(void);
 125
 126 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 127 /* Arch dependent functions for cpu hotplug support */
 128 int acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu);
 129 int acpi_unmap_lsapic(int cpu);
 130 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 131
 132 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base);
 133 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base);
 134 void acpi_irq_stats_init(void);
 135 extern u32 acpi_irq_handled;
 136 extern u32 acpi_irq_not_handled;
 137
 138 extern int sbf_port;
 139 extern unsigned long acpi_realmode_flags;
 140
 141 int acpi_register_gsi (struct device *dev, u32 gsi, int triggering, int polarity);
 142 int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
 143 int acpi_isa_irq_to_gsi (unsigned isa_irq, u32 *gsi);
 144
 145 #ifdef CONFIG_X86_IO_APIC
 146 extern int acpi_get_override_irq(u32 gsi, int *trigger, int *polarity);
 147 #else
 148 #define acpi_get_override_irq(gsi, trigger, polarity) (-1)
 149 #endif
 150 /*
 151  * This function undoes the effect of one call to acpi_register_gsi().
 152  * If this matches the last registration, any IRQ resources for gsi
 153  * are freed.
 154  */
 155 void acpi_unregister_gsi (u32 gsi);
 156
 157 struct pci_dev;
 158
 159 int acpi_pci_irq_enable (struct pci_dev *dev);
 160 void acpi_penalize_isa_irq(int irq, int active);
 161
 162 void acpi_pci_irq_disable (struct pci_dev *dev);
 163
 164 extern int ec_read(u8 addr, u8 *val);
 165 extern int ec_write(u8 addr, u8 val);
 166 extern int ec_transaction(u8 command,
 167                           const u8 *wdata, unsigned wdata_len,
 168                           u8 *rdata, unsigned rdata_len);
 169 extern acpi_handle ec_get_handle(void);
 170
 171 #if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
 172
 173 typedef void (*wmi_notify_handler) (u32 value, void *context);
 174
 175 extern acpi_status wmi_evaluate_method(const char *guid, u8 instance,
 176                                         u32 method_id,
 177                                         const struct acpi_buffer *in,
 178                                         struct acpi_buffer *out);
 179 extern acpi_status wmi_query_block(const char *guid, u8 instance,
 180                                         struct acpi_buffer *out);
 181 extern acpi_status wmi_set_block(const char *guid, u8 instance,
 182                                         const struct acpi_buffer *in);
 183 extern acpi_status wmi_install_notify_handler(const char *guid,
 184                                         wmi_notify_handler handler, void *data);
 185 extern acpi_status wmi_remove_notify_handler(const char *guid);
 186 extern acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out);
 187 extern bool wmi_has_guid(const char *guid);
 188
 189 #endif  /* CONFIG_ACPI_WMI */
 190
 191 #define ACPI_VIDEO_OUTPUT_SWITCHING                     0x0001
 192 #define ACPI_VIDEO_DEVICE_POSTING                       0x0002
 193 #define ACPI_VIDEO_ROM_AVAILABLE                        0x0004
 194 #define ACPI_VIDEO_BACKLIGHT                            0x0008
 195 #define ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR               0x0010
 196 #define ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO                0x0020
 197 #define ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VENDOR        0x0040
 198 #define ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VIDEO         0x0080
 199 #define ACPI_VIDEO_BACKLIGHT_DMI_VENDOR                 0x0100
 200 #define ACPI_VIDEO_BACKLIGHT_DMI_VIDEO                  0x0200
 201 #define ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VENDOR          0x0400
 202 #define ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VIDEO           0x0800
 203
 204 #if defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE)
 205
 206 extern long acpi_video_get_capabilities(acpi_handle graphics_dev_handle);
 207 extern long acpi_is_video_device(acpi_handle handle);
 208 extern void acpi_video_dmi_promote_vendor(void);
 209 extern void acpi_video_dmi_demote_vendor(void);
 210 extern int acpi_video_backlight_support(void);
 211 extern int acpi_video_display_switch_support(void);
 212
 213 #else
 214
 215 static inline long acpi_video_get_capabilities(acpi_handle graphics_dev_handle)
 216 {
 217         return 0;
 218 }
 219
 220 static inline long acpi_is_video_device(acpi_handle handle)
 221 {
 222         return 0;
 223 }
 224
 225 static inline void acpi_video_dmi_promote_vendor(void)
 226 {
 227 }
 228
 229 static inline void acpi_video_dmi_demote_vendor(void)
 230 {
 231 }
 232
 233 static inline int acpi_video_backlight_support(void)
 234 {
 235         return 0;
 236 }
 237
 238 static inline int acpi_video_display_switch_support(void)
 239 {
 240         return 0;
 241 }
 242
 243 #endif /* defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE) */
 244
 245 extern int acpi_blacklisted(void);
 246 extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d);
 247 extern void acpi_osi_setup(char *str);
 248
 249 #ifdef CONFIG_ACPI_NUMA
 250 int acpi_get_pxm(acpi_handle handle);
 251 int acpi_get_node(acpi_handle *handle);
 252 #else
 253 static inline int acpi_get_pxm(acpi_handle handle)
 254 {
 255         return 0;
 256 }
 257 static inline int acpi_get_node(acpi_handle *handle)
 258 {
 259         return 0;
 260 }
 261 #endif
 262 extern int acpi_paddr_to_node(u64 start_addr, u64 size);
 263
 264 extern int pnpacpi_disabled;
 265
 266 #define PXM_INVAL       (-1)
 267
 268 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res);
 269 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res);
 270 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
 271                                      struct resource *res);
 272 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
 273                                          struct resource *res);
 274 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
 275 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 276                                  struct resource *res);
 277
 278 struct resource_list_entry {
 279         struct list_head node;
 280         struct resource res;
 281 };
 282
 283 void acpi_dev_free_resource_list(struct list_head *list);
 284 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
 285                            int (*preproc)(struct acpi_resource *, void *),
 286                            void *preproc_data);
 287
 288 int acpi_check_resource_conflict(const struct resource *res);
 289
 290 int acpi_check_region(resource_size_t start, resource_size_t n,
 291                       const char *name);
 292
 293 int acpi_resources_are_enforced(void);
 294
 295 #ifdef CONFIG_HIBERNATION
 296 void __init acpi_no_s4_hw_signature(void);
 297 #endif
 298
 299 #ifdef CONFIG_PM_SLEEP
 300 void __init acpi_old_suspend_ordering(void);
 301 void __init acpi_nvs_nosave(void);
 302 void __init acpi_nvs_nosave_s3(void);
 303 #endif /* CONFIG_PM_SLEEP */
 304
 305 struct acpi_osc_context {
 306         char *uuid_str;                 /* UUID string */
 307         int rev;
 308         struct acpi_buffer cap;         /* list of DWORD capabilities */
 309         struct acpi_buffer ret;         /* free by caller if success */
 310 };
 311
 312 acpi_status acpi_str_to_uuid(char *str, u8 *uuid);
 313 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 314
 315 /* Indexes into _OSC Capabilities Buffer (DWORDs 2 & 3 are device-specific) */
 316 #define OSC_QUERY_DWORD                         0       /* DWORD 1 */
 317 #define OSC_SUPPORT_DWORD                       1       /* DWORD 2 */
 318 #define OSC_CONTROL_DWORD                       2       /* DWORD 3 */
 319
 320 /* _OSC Capabilities DWORD 1: Query/Control and Error Returns (generic) */
 321 #define OSC_QUERY_ENABLE                        0x00000001  /* input */
 322 #define OSC_REQUEST_ERROR                       0x00000002  /* return */
 323 #define OSC_INVALID_UUID_ERROR                  0x00000004  /* return */
 324 #define OSC_INVALID_REVISION_ERROR              0x00000008  /* return */
 325 #define OSC_CAPABILITIES_MASK_ERROR             0x00000010  /* return */
 326
 327 /* Platform-Wide Capabilities _OSC: Capabilities DWORD 2: Support Field */
 328 #define OSC_SB_PAD_SUPPORT                      0x00000001
 329 #define OSC_SB_PPC_OST_SUPPORT                  0x00000002
 330 #define OSC_SB_PR3_SUPPORT                      0x00000004
 331 #define OSC_SB_HOTPLUG_OST_SUPPORT              0x00000008
 332 #define OSC_SB_APEI_SUPPORT                     0x00000010
 333 #define OSC_SB_CPC_SUPPORT                      0x00000020
 334
 335 extern bool osc_sb_apei_support_acked;
 336
 337 /* PCI Host Bridge _OSC: Capabilities DWORD 2: Support Field */
 338 #define OSC_PCI_EXT_CONFIG_SUPPORT              0x00000001
 339 #define OSC_PCI_ASPM_SUPPORT                    0x00000002
 340 #define OSC_PCI_CLOCK_PM_SUPPORT                0x00000004
 341 #define OSC_PCI_SEGMENT_GROUPS_SUPPORT          0x00000008
 342 #define OSC_PCI_MSI_SUPPORT                     0x00000010
 343 #define OSC_PCI_SUPPORT_MASKS                   0x0000001f
 344
 345 /* PCI Host Bridge _OSC: Capabilities DWORD 3: Control Field */
 346 #define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL       0x00000001
 347 #define OSC_PCI_SHPC_NATIVE_HP_CONTROL          0x00000002
 348 #define OSC_PCI_EXPRESS_PME_CONTROL             0x00000004
 349 #define OSC_PCI_EXPRESS_AER_CONTROL             0x00000008
 350 #define OSC_PCI_EXPRESS_CAPABILITY_CONTROL      0x00000010
 351 #define OSC_PCI_CONTROL_MASKS                   0x0000001f
 352
 353 extern acpi_status acpi_pci_osc_control_set(acpi_handle handle,
 354                                              u32 *mask, u32 req);
 355
 356 /* Enable _OST when all relevant hotplug operations are enabled */
 357 #if defined(CONFIG_ACPI_HOTPLUG_CPU) &&                 \
 358         defined(CONFIG_ACPI_HOTPLUG_MEMORY) &&          \
 359         defined(CONFIG_ACPI_CONTAINER)
 360 #define ACPI_HOTPLUG_OST
 361 #endif
 362
 363 /* _OST Source Event Code (OSPM Action) */
 364 #define ACPI_OST_EC_OSPM_SHUTDOWN               0x100
 365 #define ACPI_OST_EC_OSPM_EJECT                  0x103
 366 #define ACPI_OST_EC_OSPM_INSERTION              0x200
 367
 368 /* _OST General Processing Status Code */
 369 #define ACPI_OST_SC_SUCCESS                     0x0
 370 #define ACPI_OST_SC_NON_SPECIFIC_FAILURE        0x1
 371 #define ACPI_OST_SC_UNRECOGNIZED_NOTIFY         0x2
 372
 373 /* _OST OS Shutdown Processing (0x100) Status Code */
 374 #define ACPI_OST_SC_OS_SHUTDOWN_DENIED          0x80
 375 #define ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS     0x81
 376 #define ACPI_OST_SC_OS_SHUTDOWN_COMPLETED       0x82
 377 #define ACPI_OST_SC_OS_SHUTDOWN_NOT_SUPPORTED   0x83
 378
 379 /* _OST Ejection Request (0x3, 0x103) Status Code */
 380 #define ACPI_OST_SC_EJECT_NOT_SUPPORTED         0x80
 381 #define ACPI_OST_SC_DEVICE_IN_USE               0x81
 382 #define ACPI_OST_SC_DEVICE_BUSY                 0x82
 383 #define ACPI_OST_SC_EJECT_DEPENDENCY_BUSY       0x83
 384 #define ACPI_OST_SC_EJECT_IN_PROGRESS           0x84
 385
 386 /* _OST Insertion Request (0x200) Status Code */
 387 #define ACPI_OST_SC_INSERT_IN_PROGRESS          0x80
 388 #define ACPI_OST_SC_DRIVER_LOAD_FAILURE         0x81
 389 #define ACPI_OST_SC_INSERT_NOT_SUPPORTED        0x82
 390
 391 extern void acpi_early_init(void);
 392
 393 extern int acpi_nvs_register(__u64 start, __u64 size);
 394
 395 extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 396                                     void *data);
 397
 398 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 399                                                const struct device *dev);
 400
 401 static inline bool acpi_driver_match_device(struct device *dev,
 402                                             const struct device_driver *drv)
 403 {
 404         return !!acpi_match_device(drv->acpi_match_table, dev);
 405 }
 406
 407 #define ACPI_PTR(_ptr)  (_ptr)
 408
 409 #else   /* !CONFIG_ACPI */
 410
 411 #define acpi_disabled 1
 412
 413 #define ACPI_COMPANION(dev)             (NULL)
 414 #define ACPI_COMPANION_SET(dev, adev)   do { } while (0)
 415 #define ACPI_HANDLE(dev)                (NULL)
 416
 417 static inline void acpi_early_init(void) { }
 418
 419 static inline int early_acpi_boot_init(void)
 420 {
 421         return 0;
 422 }
 423 static inline int acpi_boot_init(void)
 424 {
 425         return 0;
 426 }
 427
 428 static inline void acpi_boot_table_init(void)
 429 {
 430         return;
 431 }
 432
 433 static inline int acpi_mps_check(void)
 434 {
 435         return 0;
 436 }
 437
 438 static inline int acpi_check_resource_conflict(struct resource *res)
 439 {
 440         return 0;
 441 }
 442
 443 static inline int acpi_check_region(resource_size_t start, resource_size_t n,
 444                                     const char *name)
 445 {
 446         return 0;
 447 }
 448
 449 struct acpi_table_header;
 450 static inline int acpi_table_parse(char *id,
 451                                 int (*handler)(struct acpi_table_header *))
 452 {
 453         return -1;
 454 }
 455
 456 static inline int acpi_nvs_register(__u64 start, __u64 size)
 457 {
 458         return 0;
 459 }
 460
 461 static inline int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 462                                            void *data)
 463 {
 464         return 0;
 465 }
 466
 467 struct acpi_device_id;
 468
 469 static inline const struct acpi_device_id *acpi_match_device(
 470         const struct acpi_device_id *ids, const struct device *dev)
 471 {
 472         return NULL;
 473 }
 474
 475 static inline bool acpi_driver_match_device(struct device *dev,
 476                                             const struct device_driver *drv)
 477 {
 478         return false;
 479 }
 480
 481 #define ACPI_PTR(_ptr)  (NULL)
 482
 483 #endif  /* !CONFIG_ACPI */
 484
 485 #define DEVICE_ACPI_HANDLE(dev) ACPI_HANDLE(dev)
 486
 487 #ifdef CONFIG_ACPI
 488 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
 489                                u32 pm1a_ctrl,  u32 pm1b_ctrl));
 490
 491 acpi_status acpi_os_prepare_sleep(u8 sleep_state,
 492                                   u32 pm1a_control, u32 pm1b_control);
 493
 494 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
 495                                         u32 val_a,  u32 val_b));
 496
 497 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state,
 498                                            u32 val_a, u32 val_b);
 499
 500 #ifdef CONFIG_X86
 501 void arch_reserve_mem_area(acpi_physical_address addr, size_t size);
 502 #else
 503 static inline void arch_reserve_mem_area(acpi_physical_address addr,
 504                                           size_t size)
 505 {
 506 }
 507 #endif /* CONFIG_X86 */
 508 #else
 509 #define acpi_os_set_prepare_sleep(func, pm1a_ctrl, pm1b_ctrl) do { } while (0)
 510 #endif
 511
 512 #if defined(CONFIG_ACPI) && defined(CONFIG_PM_RUNTIME)
 513 int acpi_dev_runtime_suspend(struct device *dev);
 514 int acpi_dev_runtime_resume(struct device *dev);
 515 int acpi_subsys_runtime_suspend(struct device *dev);
 516 int acpi_subsys_runtime_resume(struct device *dev);
 517 #else
 518 static inline int acpi_dev_runtime_suspend(struct device *dev) { return 0; }
 519 static inline int acpi_dev_runtime_resume(struct device *dev) { return 0; }
 520 static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; }
 521 static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; }
 522 #endif
 523
 524 #if defined(CONFIG_ACPI) && defined(CONFIG_PM_SLEEP)
 525 int acpi_dev_suspend_late(struct device *dev);
 526 int acpi_dev_resume_early(struct device *dev);
 527 int acpi_subsys_prepare(struct device *dev);
 528 int acpi_subsys_suspend_late(struct device *dev);
 529 int acpi_subsys_resume_early(struct device *dev);
 530 #else
 531 static inline int acpi_dev_suspend_late(struct device *dev) { return 0; }
 532 static inline int acpi_dev_resume_early(struct device *dev) { return 0; }
 533 static inline int acpi_subsys_prepare(struct device *dev) { return 0; }
 534 static inline int acpi_subsys_suspend_late(struct device *dev) { return 0; }
 535 static inline int acpi_subsys_resume_early(struct device *dev) { return 0; }
 536 #endif
 537
 538 #if defined(CONFIG_ACPI) && defined(CONFIG_PM)
 539 struct acpi_device *acpi_dev_pm_get_node(struct device *dev);
 540 int acpi_dev_pm_attach(struct device *dev, bool power_on);
 541 void acpi_dev_pm_detach(struct device *dev, bool power_off);
 542 #else
 543 static inline struct acpi_device *acpi_dev_pm_get_node(struct device *dev)
 544 {
 545         return NULL;
 546 }
 547 static inline int acpi_dev_pm_attach(struct device *dev, bool power_on)
 548 {
 549         return -ENODEV;
 550 }
 551 static inline void acpi_dev_pm_detach(struct device *dev, bool power_off) {}
 552 #endif
 553
 554 #ifdef CONFIG_ACPI
 555 __printf(3, 4)
 556 void acpi_handle_printk(const char *level, acpi_handle handle,
 557                         const char *fmt, ...);
 558 #else   /* !CONFIG_ACPI */
 559 static inline __printf(3, 4) void
 560 acpi_handle_printk(const char *level, void *handle, const char *fmt, ...) {}
 561 #endif  /* !CONFIG_ACPI */
 562
 563 /*
 564  * acpi_handle_<level>: Print message with ACPI prefix and object path
 565  *
 566  * These interfaces acquire the global namespace mutex to obtain an object
 567  * path.  In interrupt context, it shows the object path as <n/a>.
 568  */
 569 #define acpi_handle_emerg(handle, fmt, ...)                             \
 570         acpi_handle_printk(KERN_EMERG, handle, fmt, ##__VA_ARGS__)
 571 #define acpi_handle_alert(handle, fmt, ...)                             \
 572         acpi_handle_printk(KERN_ALERT, handle, fmt, ##__VA_ARGS__)
 573 #define acpi_handle_crit(handle, fmt, ...)                              \
 574         acpi_handle_printk(KERN_CRIT, handle, fmt, ##__VA_ARGS__)
 575 #define acpi_handle_err(handle, fmt, ...)                               \
 576         acpi_handle_printk(KERN_ERR, handle, fmt, ##__VA_ARGS__)
 577 #define acpi_handle_warn(handle, fmt, ...)                              \
 578         acpi_handle_printk(KERN_WARNING, handle, fmt, ##__VA_ARGS__)
 579 #define acpi_handle_notice(handle, fmt, ...)                            \
 580         acpi_handle_printk(KERN_NOTICE, handle, fmt, ##__VA_ARGS__)
 581 #define acpi_handle_info(handle, fmt, ...)                              \
 582         acpi_handle_printk(KERN_INFO, handle, fmt, ##__VA_ARGS__)
 583
 584 /* REVISIT: Support CONFIG_DYNAMIC_DEBUG when necessary */
 585 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
 586 #define acpi_handle_debug(handle, fmt, ...)                             \
 587         acpi_handle_printk(KERN_DEBUG, handle, fmt, ##__VA_ARGS__)
 588 #else
 589 #define acpi_handle_debug(handle, fmt, ...)                             \
 590 ({                                                                      \
 591         if (0)                                                          \
 592                 acpi_handle_printk(KERN_DEBUG, handle, fmt, ##__VA_ARGS__); \
 593         0;                                                              \
 594 })
 595 #endif
 596
 597 #endif  /*_LINUX_ACPI_H*/