drivers/acpi/hardware/hwsleep.c

   1
   2 /******************************************************************************
   3  *
   4  * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2007, R. Byron Moore
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include <acpi/acpi.h>
  46 #include <acpi/actables.h>
  47
  48 #define _COMPONENT          ACPI_HARDWARE
  49 ACPI_MODULE_NAME("hwsleep")
  50
  51 /*******************************************************************************
  52  *
  53  * FUNCTION:    acpi_set_firmware_waking_vector
  54  *
  55  * PARAMETERS:  physical_address    - Physical address of ACPI real mode
  56  *                                    entry point.
  57  *
  58  * RETURN:      Status
  59  *
  60  * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
  61  *
  62  ******************************************************************************/
  63 acpi_status
  64 acpi_set_firmware_waking_vector(acpi_physical_address physical_address)
  65 {
  66         struct acpi_table_facs *facs;
  67         acpi_status status;
  68
  69         ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
  70
  71         /* Get the FACS */
  72
  73         status =
  74             acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
  75                                     (struct acpi_table_header **)&facs);
  76         if (ACPI_FAILURE(status)) {
  77                 return_ACPI_STATUS(status);
  78         }
  79
  80         /* Set the vector */
  81
  82         if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
  83                 /*
  84                  * ACPI 1.0 FACS or short table or optional X_ field is zero
  85                  */
  86                 facs->firmware_waking_vector = (u32) physical_address;
  87         } else {
  88                 /*
  89                  * ACPI 2.0 FACS with valid X_ field
  90                  */
  91                 facs->xfirmware_waking_vector = physical_address;
  92         }
  93
  94         return_ACPI_STATUS(AE_OK);
  95 }
  96
  97 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
  98
  99 /*******************************************************************************
 100  *
 101  * FUNCTION:    acpi_get_firmware_waking_vector
 102  *
 103  * PARAMETERS:  *physical_address   - Where the contents of
 104  *                                    the firmware_waking_vector field of
 105  *                                    the FACS will be returned.
 106  *
 107  * RETURN:      Status, vector
 108  *
 109  * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
 110  *
 111  ******************************************************************************/
 112 #ifdef ACPI_FUTURE_USAGE
 113 acpi_status
 114 acpi_get_firmware_waking_vector(acpi_physical_address * physical_address)
 115 {
 116         struct acpi_table_facs *facs;
 117         acpi_status status;
 118
 119         ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector);
 120
 121         if (!physical_address) {
 122                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 123         }
 124
 125         /* Get the FACS */
 126
 127         status =
 128             acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
 129                                     (struct acpi_table_header **)&facs);
 130         if (ACPI_FAILURE(status)) {
 131                 return_ACPI_STATUS(status);
 132         }
 133
 134         /* Get the vector */
 135
 136         if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
 137                 /*
 138                  * ACPI 1.0 FACS or short table or optional X_ field is zero
 139                  */
 140                 *physical_address =
 141                     (acpi_physical_address) facs->firmware_waking_vector;
 142         } else {
 143                 /*
 144                  * ACPI 2.0 FACS with valid X_ field
 145                  */
 146                 *physical_address =
 147                     (acpi_physical_address) facs->xfirmware_waking_vector;
 148         }
 149
 150         return_ACPI_STATUS(AE_OK);
 151 }
 152
 153 ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector)
 154 #endif
 155 /*******************************************************************************
 156  *
 157  * FUNCTION:    acpi_enter_sleep_state_prep
 158  *
 159  * PARAMETERS:  sleep_state         - Which sleep state to enter
 160  *
 161  * RETURN:      Status
 162  *
 163  * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
 164  *              This function must execute with interrupts enabled.
 165  *              We break sleeping into 2 stages so that OSPM can handle
 166  *              various OS-specific tasks between the two steps.
 167  *
 168  ******************************************************************************/
 169 acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 170 {
 171         acpi_status status;
 172         struct acpi_object_list arg_list;
 173         union acpi_object arg;
 174
 175         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
 176
 177         /*
 178          * _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
 179          */
 180         status = acpi_get_sleep_type_data(sleep_state,
 181                                           &acpi_gbl_sleep_type_a,
 182                                           &acpi_gbl_sleep_type_b);
 183         if (ACPI_FAILURE(status)) {
 184                 return_ACPI_STATUS(status);
 185         }
 186
 187         /* Setup parameter object */
 188
 189         arg_list.count = 1;
 190         arg_list.pointer = &arg;
 191
 192         arg.type = ACPI_TYPE_INTEGER;
 193         arg.integer.value = sleep_state;
 194
 195         /* Run the _PTS and _GTS methods */
 196
 197         status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
 198         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 199                 return_ACPI_STATUS(status);
 200         }
 201
 202         status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
 203         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 204                 return_ACPI_STATUS(status);
 205         }
 206
 207         /* Setup the argument to _SST */
 208
 209         switch (sleep_state) {
 210         case ACPI_STATE_S0:
 211                 arg.integer.value = ACPI_SST_WORKING;
 212                 break;
 213
 214         case ACPI_STATE_S1:
 215         case ACPI_STATE_S2:
 216         case ACPI_STATE_S3:
 217                 arg.integer.value = ACPI_SST_SLEEPING;
 218                 break;
 219
 220         case ACPI_STATE_S4:
 221                 arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
 222                 break;
 223
 224         default:
 225                 arg.integer.value = ACPI_SST_INDICATOR_OFF;     /* Default is off */
 226                 break;
 227         }
 228
 229         /* Set the system indicators to show the desired sleep state. */
 230
 231         status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
 232         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 233                 ACPI_EXCEPTION((AE_INFO, status,
 234                                 "While executing method _SST"));
 235         }
 236
 237         /* Disable/Clear all GPEs */
 238
 239         status = acpi_hw_disable_all_gpes();
 240
 241         return_ACPI_STATUS(status);
 242 }
 243
 244 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
 245
 246 /*******************************************************************************
 247  *
 248  * FUNCTION:    acpi_enter_sleep_state
 249  *
 250  * PARAMETERS:  sleep_state         - Which sleep state to enter
 251  *
 252  * RETURN:      Status
 253  *
 254  * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
 255  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 256  *
 257  ******************************************************************************/
 258 acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 259 {
 260         u32 PM1Acontrol;
 261         u32 PM1Bcontrol;
 262         struct acpi_bit_register_info *sleep_type_reg_info;
 263         struct acpi_bit_register_info *sleep_enable_reg_info;
 264         u32 in_value;
 265         acpi_status status;
 266
 267         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
 268
 269         if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
 270             (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
 271                 ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X",
 272                             acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
 273                 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 274         }
 275
 276         sleep_type_reg_info =
 277             acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
 278         sleep_enable_reg_info =
 279             acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
 280
 281         /* Clear wake status */
 282
 283         status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
 284         if (ACPI_FAILURE(status)) {
 285                 return_ACPI_STATUS(status);
 286         }
 287
 288         /* Clear all fixed and general purpose status bits */
 289
 290         status = acpi_hw_clear_acpi_status();
 291         if (ACPI_FAILURE(status)) {
 292                 return_ACPI_STATUS(status);
 293         }
 294
 295         /*
 296          * 2) Enable all wakeup GPEs
 297          */
 298         status = acpi_hw_disable_all_gpes();
 299         if (ACPI_FAILURE(status)) {
 300                 return_ACPI_STATUS(status);
 301         }
 302
 303         acpi_gbl_system_awake_and_running = FALSE;
 304
 305         status = acpi_hw_enable_all_wakeup_gpes();
 306         if (ACPI_FAILURE(status)) {
 307                 return_ACPI_STATUS(status);
 308         }
 309
 310         /* Get current value of PM1A control */
 311
 312         status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
 313         if (ACPI_FAILURE(status)) {
 314                 return_ACPI_STATUS(status);
 315         }
 316         ACPI_DEBUG_PRINT((ACPI_DB_INIT,
 317                           "Entering sleep state [S%d]\n", sleep_state));
 318
 319         /* Clear SLP_EN and SLP_TYP fields */
 320
 321         PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
 322                          sleep_enable_reg_info->access_bit_mask);
 323         PM1Bcontrol = PM1Acontrol;
 324
 325         /* Insert SLP_TYP bits */
 326
 327         PM1Acontrol |=
 328             (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
 329         PM1Bcontrol |=
 330             (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
 331
 332         /*
 333          * We split the writes of SLP_TYP and SLP_EN to workaround
 334          * poorly implemented hardware.
 335          */
 336
 337         /* Write #1: fill in SLP_TYP data */
 338
 339         status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
 340                                         PM1Acontrol);
 341         if (ACPI_FAILURE(status)) {
 342                 return_ACPI_STATUS(status);
 343         }
 344
 345         status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
 346                                         PM1Bcontrol);
 347         if (ACPI_FAILURE(status)) {
 348                 return_ACPI_STATUS(status);
 349         }
 350
 351         /* Insert SLP_ENABLE bit */
 352
 353         PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
 354         PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
 355
 356         /* Write #2: SLP_TYP + SLP_EN */
 357
 358         ACPI_FLUSH_CPU_CACHE();
 359
 360         status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
 361                                         PM1Acontrol);
 362         if (ACPI_FAILURE(status)) {
 363                 return_ACPI_STATUS(status);
 364         }
 365
 366         status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
 367                                         PM1Bcontrol);
 368         if (ACPI_FAILURE(status)) {
 369                 return_ACPI_STATUS(status);
 370         }
 371
 372         if (sleep_state > ACPI_STATE_S3) {
 373                 /*
 374                  * We wanted to sleep > S3, but it didn't happen (by virtue of the
 375                  * fact that we are still executing!)
 376                  *
 377                  * Wait ten seconds, then try again. This is to get S4/S5 to work on
 378                  * all machines.
 379                  *
 380                  * We wait so long to allow chipsets that poll this reg very slowly to
 381                  * still read the right value. Ideally, this block would go
 382                  * away entirely.
 383                  */
 384                 acpi_os_stall(10000000);
 385
 386                 status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
 387                                                 sleep_enable_reg_info->
 388                                                 access_bit_mask);
 389                 if (ACPI_FAILURE(status)) {
 390                         return_ACPI_STATUS(status);
 391                 }
 392         }
 393
 394         /* Wait until we enter sleep state */
 395
 396         do {
 397                 status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS,
 398                                                     &in_value);
 399                 if (ACPI_FAILURE(status)) {
 400                         return_ACPI_STATUS(status);
 401                 }
 402
 403                 /* Spin until we wake */
 404
 405         } while (!in_value);
 406
 407         return_ACPI_STATUS(AE_OK);
 408 }
 409
 410 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
 411
 412 /*******************************************************************************
 413  *
 414  * FUNCTION:    acpi_enter_sleep_state_s4bios
 415  *
 416  * PARAMETERS:  None
 417  *
 418  * RETURN:      Status
 419  *
 420  * DESCRIPTION: Perform a S4 bios request.
 421  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 422  *
 423  ******************************************************************************/
 424 acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
 425 {
 426         u32 in_value;
 427         acpi_status status;
 428
 429         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
 430
 431         status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
 432         if (ACPI_FAILURE(status)) {
 433                 return_ACPI_STATUS(status);
 434         }
 435
 436         status = acpi_hw_clear_acpi_status();
 437         if (ACPI_FAILURE(status)) {
 438                 return_ACPI_STATUS(status);
 439         }
 440
 441         /*
 442          * 1) Disable/Clear all GPEs
 443          * 2) Enable all wakeup GPEs
 444          */
 445         status = acpi_hw_disable_all_gpes();
 446         if (ACPI_FAILURE(status)) {
 447                 return_ACPI_STATUS(status);
 448         }
 449         acpi_gbl_system_awake_and_running = FALSE;
 450
 451         status = acpi_hw_enable_all_wakeup_gpes();
 452         if (ACPI_FAILURE(status)) {
 453                 return_ACPI_STATUS(status);
 454         }
 455
 456         ACPI_FLUSH_CPU_CACHE();
 457
 458         status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
 459                                     (u32) acpi_gbl_FADT.S4bios_request, 8);
 460
 461         do {
 462                 acpi_os_stall(1000);
 463                 status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value);
 464                 if (ACPI_FAILURE(status)) {
 465                         return_ACPI_STATUS(status);
 466                 }
 467         } while (!in_value);
 468
 469         return_ACPI_STATUS(AE_OK);
 470 }
 471
 472 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
 473
 474 /*******************************************************************************
 475  *
 476  * FUNCTION:    acpi_leave_sleep_state
 477  *
 478  * PARAMETERS:  sleep_state         - Which sleep state we just exited
 479  *
 480  * RETURN:      Status
 481  *
 482  * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
 483  *              Called with interrupts ENABLED.
 484  *
 485  ******************************************************************************/
 486 acpi_status acpi_leave_sleep_state(u8 sleep_state)
 487 {
 488         struct acpi_object_list arg_list;
 489         union acpi_object arg;
 490         acpi_status status;
 491         struct acpi_bit_register_info *sleep_type_reg_info;
 492         struct acpi_bit_register_info *sleep_enable_reg_info;
 493         u32 PM1Acontrol;
 494         u32 PM1Bcontrol;
 495
 496         ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
 497
 498         /*
 499          * Set SLP_TYPE and SLP_EN to state S0.
 500          * This is unclear from the ACPI Spec, but it is required
 501          * by some machines.
 502          */
 503         status = acpi_get_sleep_type_data(ACPI_STATE_S0,
 504                                           &acpi_gbl_sleep_type_a,
 505                                           &acpi_gbl_sleep_type_b);
 506         if (ACPI_SUCCESS(status)) {
 507                 sleep_type_reg_info =
 508                     acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
 509                 sleep_enable_reg_info =
 510                     acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
 511
 512                 /* Get current value of PM1A control */
 513
 514                 status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
 515                                                &PM1Acontrol);
 516                 if (ACPI_SUCCESS(status)) {
 517
 518                         /* Clear SLP_EN and SLP_TYP fields */
 519
 520                         PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
 521                                          sleep_enable_reg_info->
 522                                          access_bit_mask);
 523                         PM1Bcontrol = PM1Acontrol;
 524
 525                         /* Insert SLP_TYP bits */
 526
 527                         PM1Acontrol |=
 528                             (acpi_gbl_sleep_type_a << sleep_type_reg_info->
 529                              bit_position);
 530                         PM1Bcontrol |=
 531                             (acpi_gbl_sleep_type_b << sleep_type_reg_info->
 532                              bit_position);
 533
 534                         /* Just ignore any errors */
 535
 536                         (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
 537                                                      PM1Acontrol);
 538                         (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
 539                                                      PM1Bcontrol);
 540                 }
 541         }
 542
 543         /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
 544
 545         acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
 546
 547         /* Setup parameter object */
 548
 549         arg_list.count = 1;
 550         arg_list.pointer = &arg;
 551         arg.type = ACPI_TYPE_INTEGER;
 552
 553         /* Ignore any errors from these methods */
 554
 555         arg.integer.value = ACPI_SST_WAKING;
 556         status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
 557         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 558                 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
 559         }
 560
 561         arg.integer.value = sleep_state;
 562         status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
 563         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 564                 ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
 565         }
 566
 567         /*
 568          * GPEs must be enabled before _WAK is called as GPEs
 569          * might get fired there
 570          *
 571          * Restore the GPEs:
 572          * 1) Disable/Clear all GPEs
 573          * 2) Enable all runtime GPEs
 574          */
 575         status = acpi_hw_disable_all_gpes();
 576         if (ACPI_FAILURE(status)) {
 577                 return_ACPI_STATUS(status);
 578         }
 579         status = acpi_hw_enable_all_runtime_gpes();
 580         if (ACPI_FAILURE(status)) {
 581                 return_ACPI_STATUS(status);
 582         }
 583
 584         status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
 585         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 586                 ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
 587         }
 588         /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
 589
 590         acpi_gbl_system_awake_and_running = TRUE;
 591
 592         /* Enable power button */
 593
 594         (void)
 595             acpi_set_register(acpi_gbl_fixed_event_info
 596                               [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1);
 597
 598         (void)
 599             acpi_set_register(acpi_gbl_fixed_event_info
 600                               [ACPI_EVENT_POWER_BUTTON].status_register_id, 1);
 601
 602         arg.integer.value = ACPI_SST_WORKING;
 603         status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
 604         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 605                 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
 606         }
 607
 608         return_ACPI_STATUS(status);
 609 }
 610
 611 ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)