hwsleep.c revision 193335
1 2/****************************************************************************** 3 * 4 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#include "acpi.h" 118#include "accommon.h" 119 120#define _COMPONENT ACPI_HARDWARE 121 ACPI_MODULE_NAME ("hwsleep") 122 123 124/******************************************************************************* 125 * 126 * FUNCTION: AcpiSetFirmwareWakingVector 127 * 128 * PARAMETERS: PhysicalAddress - 32-bit physical address of ACPI real mode 129 * entry point. 130 * 131 * RETURN: Status 132 * 133 * DESCRIPTION: Sets the 32-bit FirmwareWakingVector field of the FACS 134 * 135 ******************************************************************************/ 136 137ACPI_STATUS 138AcpiSetFirmwareWakingVector ( 139 UINT32 PhysicalAddress) 140{ 141 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector); 142 143 144 /* Set the 32-bit vector */ 145 146 AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress; 147 148 /* Clear the 64-bit vector if it exists */ 149 150 if ((AcpiGbl_FACS->Length > 32) && (AcpiGbl_FACS->Version >= 1)) 151 { 152 AcpiGbl_FACS->XFirmwareWakingVector = 0; 153 } 154 155 return_ACPI_STATUS (AE_OK); 156} 157 158ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector) 159 160 161#if ACPI_MACHINE_WIDTH == 64 162/******************************************************************************* 163 * 164 * FUNCTION: AcpiSetFirmwareWakingVector64 165 * 166 * PARAMETERS: PhysicalAddress - 64-bit physical address of ACPI protected 167 * mode entry point. 168 * 169 * RETURN: Status 170 * 171 * DESCRIPTION: Sets the 64-bit X_FirmwareWakingVector field of the FACS, if 172 * it exists in the table. This function is intended for use with 173 * 64-bit host operating systems. 174 * 175 ******************************************************************************/ 176 177ACPI_STATUS 178AcpiSetFirmwareWakingVector64 ( 179 UINT64 PhysicalAddress) 180{ 181 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector64); 182 183 184 /* Determine if the 64-bit vector actually exists */ 185 186 if ((AcpiGbl_FACS->Length <= 32) || (AcpiGbl_FACS->Version < 1)) 187 { 188 return_ACPI_STATUS (AE_NOT_EXIST); 189 } 190 191 /* Clear 32-bit vector, set the 64-bit X_ vector */ 192 193 AcpiGbl_FACS->FirmwareWakingVector = 0; 194 AcpiGbl_FACS->XFirmwareWakingVector = PhysicalAddress; 195 return_ACPI_STATUS (AE_OK); 196} 197 198ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector64) 199#endif 200 201/******************************************************************************* 202 * 203 * FUNCTION: AcpiEnterSleepStatePrep 204 * 205 * PARAMETERS: SleepState - Which sleep state to enter 206 * 207 * RETURN: Status 208 * 209 * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) 210 * This function must execute with interrupts enabled. 211 * We break sleeping into 2 stages so that OSPM can handle 212 * various OS-specific tasks between the two steps. 213 * 214 ******************************************************************************/ 215 216ACPI_STATUS 217AcpiEnterSleepStatePrep ( 218 UINT8 SleepState) 219{ 220 ACPI_STATUS Status; 221 ACPI_OBJECT_LIST ArgList; 222 ACPI_OBJECT Arg; 223 224 225 ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep); 226 227 228 /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */ 229 230 Status = AcpiGetSleepTypeData (SleepState, 231 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 232 if (ACPI_FAILURE (Status)) 233 { 234 return_ACPI_STATUS (Status); 235 } 236 237 /* Execute the _PTS method (Prepare To Sleep) */ 238 239 ArgList.Count = 1; 240 ArgList.Pointer = &Arg; 241 Arg.Type = ACPI_TYPE_INTEGER; 242 Arg.Integer.Value = SleepState; 243 244 Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL); 245 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 246 { 247 return_ACPI_STATUS (Status); 248 } 249 250 /* Setup the argument to the _SST method (System STatus) */ 251 252 switch (SleepState) 253 { 254 case ACPI_STATE_S0: 255 Arg.Integer.Value = ACPI_SST_WORKING; 256 break; 257 258 case ACPI_STATE_S1: 259 case ACPI_STATE_S2: 260 case ACPI_STATE_S3: 261 Arg.Integer.Value = ACPI_SST_SLEEPING; 262 break; 263 264 case ACPI_STATE_S4: 265 Arg.Integer.Value = ACPI_SST_SLEEP_CONTEXT; 266 break; 267 268 default: 269 Arg.Integer.Value = ACPI_SST_INDICATOR_OFF; /* Default is off */ 270 break; 271 } 272 273 /* 274 * Set the system indicators to show the desired sleep state. 275 * _SST is an optional method (return no error if not found) 276 */ 277 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 278 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 279 { 280 ACPI_EXCEPTION ((AE_INFO, Status, "While executing method _SST")); 281 } 282 283 return_ACPI_STATUS (AE_OK); 284} 285 286ACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep) 287 288 289/******************************************************************************* 290 * 291 * FUNCTION: AcpiEnterSleepState 292 * 293 * PARAMETERS: SleepState - Which sleep state to enter 294 * 295 * RETURN: Status 296 * 297 * DESCRIPTION: Enter a system sleep state 298 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 299 * 300 ******************************************************************************/ 301 302ACPI_STATUS 303AcpiEnterSleepState ( 304 UINT8 SleepState) 305{ 306 UINT32 Pm1aControl; 307 UINT32 Pm1bControl; 308 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 309 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 310 UINT32 InValue; 311 ACPI_OBJECT_LIST ArgList; 312 ACPI_OBJECT Arg; 313 UINT32 Retry; 314 ACPI_STATUS Status; 315 316 317 ACPI_FUNCTION_TRACE (AcpiEnterSleepState); 318 319 320 if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) || 321 (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX)) 322 { 323 ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=%X B=%X", 324 AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB)); 325 return_ACPI_STATUS (AE_AML_OPERAND_VALUE); 326 } 327 328 SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 329 SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 330 331 /* Clear wake status */ 332 333 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 334 if (ACPI_FAILURE (Status)) 335 { 336 return_ACPI_STATUS (Status); 337 } 338 339 /* Clear all fixed and general purpose status bits */ 340 341 Status = AcpiHwClearAcpiStatus (); 342 if (ACPI_FAILURE (Status)) 343 { 344 return_ACPI_STATUS (Status); 345 } 346 347 if (SleepState != ACPI_STATE_S5) 348 { 349 /* Disable BM arbitration */ 350 351 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1); 352 if (ACPI_FAILURE (Status)) 353 { 354 return_ACPI_STATUS (Status); 355 } 356 } 357 358 /* 359 * 1) Disable/Clear all GPEs 360 * 2) Enable all wakeup GPEs 361 */ 362 Status = AcpiHwDisableAllGpes (); 363 if (ACPI_FAILURE (Status)) 364 { 365 return_ACPI_STATUS (Status); 366 } 367 AcpiGbl_SystemAwakeAndRunning = FALSE; 368 369 Status = AcpiHwEnableAllWakeupGpes (); 370 if (ACPI_FAILURE (Status)) 371 { 372 return_ACPI_STATUS (Status); 373 } 374 375 /* Execute the _GTS method (Going To Sleep) */ 376 377 ArgList.Count = 1; 378 ArgList.Pointer = &Arg; 379 Arg.Type = ACPI_TYPE_INTEGER; 380 Arg.Integer.Value = SleepState; 381 382 Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL); 383 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 384 { 385 return_ACPI_STATUS (Status); 386 } 387 388 /* Get current value of PM1A control */ 389 390 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 391 &Pm1aControl); 392 if (ACPI_FAILURE (Status)) 393 { 394 return_ACPI_STATUS (Status); 395 } 396 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 397 "Entering sleep state [S%d]\n", SleepState)); 398 399 /* Clear the SLP_EN and SLP_TYP fields */ 400 401 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 402 SleepEnableRegInfo->AccessBitMask); 403 Pm1bControl = Pm1aControl; 404 405 /* Insert the SLP_TYP bits */ 406 407 Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition); 408 Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition); 409 410 /* 411 * We split the writes of SLP_TYP and SLP_EN to workaround 412 * poorly implemented hardware. 413 */ 414 415 /* Write #1: write the SLP_TYP data to the PM1 Control registers */ 416 417 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 418 if (ACPI_FAILURE (Status)) 419 { 420 return_ACPI_STATUS (Status); 421 } 422 423 /* Insert the sleep enable (SLP_EN) bit */ 424 425 Pm1aControl |= SleepEnableRegInfo->AccessBitMask; 426 Pm1bControl |= SleepEnableRegInfo->AccessBitMask; 427 428 /* Flush caches, as per ACPI specification */ 429 430 ACPI_FLUSH_CPU_CACHE (); 431 432 /* Write #2: Write both SLP_TYP + SLP_EN */ 433 434 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 435 if (ACPI_FAILURE (Status)) 436 { 437 return_ACPI_STATUS (Status); 438 } 439 440 if (SleepState > ACPI_STATE_S3) 441 { 442 /* 443 * We wanted to sleep > S3, but it didn't happen (by virtue of the 444 * fact that we are still executing!) 445 * 446 * Wait ten seconds, then try again. This is to get S4/S5 to work on 447 * all machines. 448 * 449 * We wait so long to allow chipsets that poll this reg very slowly 450 * to still read the right value. Ideally, this block would go 451 * away entirely. 452 */ 453 AcpiOsStall (10000000); 454 455 Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL, 456 SleepEnableRegInfo->AccessBitMask); 457 if (ACPI_FAILURE (Status)) 458 { 459 return_ACPI_STATUS (Status); 460 } 461 } 462 463 /* Wait until we enter sleep state */ 464 465 Retry = 1000; 466 do 467 { 468 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 469 if (ACPI_FAILURE (Status)) 470 { 471 return_ACPI_STATUS (Status); 472 } 473 474 /* 475 * Some BIOSs don't set WAK_STS at all. Give up waiting after 476 * 1000 retries if it still isn't set. 477 */ 478 if (Retry-- == 0) 479 { 480 break; 481 } 482 483 /* Spin until we wake */ 484 485 } while (!InValue); 486 487 return_ACPI_STATUS (AE_OK); 488} 489 490ACPI_EXPORT_SYMBOL (AcpiEnterSleepState) 491 492 493/******************************************************************************* 494 * 495 * FUNCTION: AcpiEnterSleepStateS4bios 496 * 497 * PARAMETERS: None 498 * 499 * RETURN: Status 500 * 501 * DESCRIPTION: Perform a S4 bios request. 502 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 503 * 504 ******************************************************************************/ 505 506ACPI_STATUS 507AcpiEnterSleepStateS4bios ( 508 void) 509{ 510 UINT32 InValue; 511 ACPI_STATUS Status; 512 513 514 ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios); 515 516 517 /* Clear the wake status bit (PM1) */ 518 519 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 520 if (ACPI_FAILURE (Status)) 521 { 522 return_ACPI_STATUS (Status); 523 } 524 525 Status = AcpiHwClearAcpiStatus (); 526 if (ACPI_FAILURE (Status)) 527 { 528 return_ACPI_STATUS (Status); 529 } 530 531 /* 532 * 1) Disable/Clear all GPEs 533 * 2) Enable all wakeup GPEs 534 */ 535 Status = AcpiHwDisableAllGpes (); 536 if (ACPI_FAILURE (Status)) 537 { 538 return_ACPI_STATUS (Status); 539 } 540 AcpiGbl_SystemAwakeAndRunning = FALSE; 541 542 Status = AcpiHwEnableAllWakeupGpes (); 543 if (ACPI_FAILURE (Status)) 544 { 545 return_ACPI_STATUS (Status); 546 } 547 548 ACPI_FLUSH_CPU_CACHE (); 549 550 Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 551 (UINT32) AcpiGbl_FADT.S4BiosRequest, 8); 552 553 do { 554 AcpiOsStall(1000); 555 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 556 if (ACPI_FAILURE (Status)) 557 { 558 return_ACPI_STATUS (Status); 559 } 560 } while (!InValue); 561 562 return_ACPI_STATUS (AE_OK); 563} 564 565ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios) 566 567 568/******************************************************************************* 569 * 570 * FUNCTION: AcpiLeaveSleepState 571 * 572 * PARAMETERS: SleepState - Which sleep state we just exited 573 * 574 * RETURN: Status 575 * 576 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep 577 * Called with interrupts ENABLED. 578 * 579 ******************************************************************************/ 580 581ACPI_STATUS 582AcpiLeaveSleepState ( 583 UINT8 SleepState) 584{ 585 ACPI_OBJECT_LIST ArgList; 586 ACPI_OBJECT Arg; 587 ACPI_STATUS Status; 588 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 589 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 590 UINT32 Pm1aControl; 591 UINT32 Pm1bControl; 592 593 594 ACPI_FUNCTION_TRACE (AcpiLeaveSleepState); 595 596 597 /* 598 * Set SLP_TYPE and SLP_EN to state S0. 599 * This is unclear from the ACPI Spec, but it is required 600 * by some machines. 601 */ 602 Status = AcpiGetSleepTypeData (ACPI_STATE_S0, 603 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 604 if (ACPI_SUCCESS (Status)) 605 { 606 SleepTypeRegInfo = 607 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 608 SleepEnableRegInfo = 609 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 610 611 /* Get current value of PM1A control */ 612 613 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 614 &Pm1aControl); 615 if (ACPI_SUCCESS (Status)) 616 { 617 /* Clear the SLP_EN and SLP_TYP fields */ 618 619 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 620 SleepEnableRegInfo->AccessBitMask); 621 Pm1bControl = Pm1aControl; 622 623 /* Insert the SLP_TYP bits */ 624 625 Pm1aControl |= (AcpiGbl_SleepTypeA << 626 SleepTypeRegInfo->BitPosition); 627 Pm1bControl |= (AcpiGbl_SleepTypeB << 628 SleepTypeRegInfo->BitPosition); 629 630 /* Write the control registers and ignore any errors */ 631 632 (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 633 } 634 } 635 636 /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ 637 638 AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; 639 640 /* Setup parameter object */ 641 642 ArgList.Count = 1; 643 ArgList.Pointer = &Arg; 644 Arg.Type = ACPI_TYPE_INTEGER; 645 646 /* Ignore any errors from these methods */ 647 648 Arg.Integer.Value = ACPI_SST_WAKING; 649 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 650 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 651 { 652 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 653 } 654 655 Arg.Integer.Value = SleepState; 656 Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL); 657 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 658 { 659 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS")); 660 } 661 662 Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL); 663 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 664 { 665 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK")); 666 } 667 /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ 668 669 /* 670 * Restore the GPEs: 671 * 1) Disable/Clear all GPEs 672 * 2) Enable all runtime GPEs 673 */ 674 Status = AcpiHwDisableAllGpes (); 675 if (ACPI_FAILURE (Status)) 676 { 677 return_ACPI_STATUS (Status); 678 } 679 AcpiGbl_SystemAwakeAndRunning = TRUE; 680 681 Status = AcpiHwEnableAllRuntimeGpes (); 682 if (ACPI_FAILURE (Status)) 683 { 684 return_ACPI_STATUS (Status); 685 } 686 687 /* Enable power button */ 688 689 (void) AcpiWriteBitRegister( 690 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId, 691 ACPI_ENABLE_EVENT); 692 693 (void) AcpiWriteBitRegister( 694 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId, 695 ACPI_CLEAR_STATUS); 696 697 /* Enable BM arbitration */ 698 699 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0); 700 if (ACPI_FAILURE (Status)) 701 { 702 return_ACPI_STATUS (Status); 703 } 704 705 Arg.Integer.Value = ACPI_SST_WORKING; 706 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 707 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 708 { 709 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 710 } 711 712 return_ACPI_STATUS (Status); 713} 714 715ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState) 716 717