hwsleep.c revision 193267
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 ACPI_STATUS Status; 314 315 316 ACPI_FUNCTION_TRACE (AcpiEnterSleepState); 317 318 319 if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) || 320 (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX)) 321 { 322 ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=%X B=%X", 323 AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB)); 324 return_ACPI_STATUS (AE_AML_OPERAND_VALUE); 325 } 326 327 SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 328 SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 329 330 /* Clear wake status */ 331 332 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 333 if (ACPI_FAILURE (Status)) 334 { 335 return_ACPI_STATUS (Status); 336 } 337 338 /* Clear all fixed and general purpose status bits */ 339 340 Status = AcpiHwClearAcpiStatus (); 341 if (ACPI_FAILURE (Status)) 342 { 343 return_ACPI_STATUS (Status); 344 } 345 346 if (SleepState != ACPI_STATE_S5) 347 { 348 /* Disable BM arbitration */ 349 350 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1); 351 if (ACPI_FAILURE (Status)) 352 { 353 return_ACPI_STATUS (Status); 354 } 355 } 356 357 /* 358 * 1) Disable/Clear all GPEs 359 * 2) Enable all wakeup GPEs 360 */ 361 Status = AcpiHwDisableAllGpes (); 362 if (ACPI_FAILURE (Status)) 363 { 364 return_ACPI_STATUS (Status); 365 } 366 AcpiGbl_SystemAwakeAndRunning = FALSE; 367 368 Status = AcpiHwEnableAllWakeupGpes (); 369 if (ACPI_FAILURE (Status)) 370 { 371 return_ACPI_STATUS (Status); 372 } 373 374 /* Execute the _GTS method (Going To Sleep) */ 375 376 ArgList.Count = 1; 377 ArgList.Pointer = &Arg; 378 Arg.Type = ACPI_TYPE_INTEGER; 379 Arg.Integer.Value = SleepState; 380 381 Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL); 382 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 383 { 384 return_ACPI_STATUS (Status); 385 } 386 387 /* Get current value of PM1A control */ 388 389 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 390 &Pm1aControl); 391 if (ACPI_FAILURE (Status)) 392 { 393 return_ACPI_STATUS (Status); 394 } 395 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 396 "Entering sleep state [S%d]\n", SleepState)); 397 398 /* Clear the SLP_EN and SLP_TYP fields */ 399 400 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 401 SleepEnableRegInfo->AccessBitMask); 402 Pm1bControl = Pm1aControl; 403 404 /* Insert the SLP_TYP bits */ 405 406 Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition); 407 Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition); 408 409 /* 410 * We split the writes of SLP_TYP and SLP_EN to workaround 411 * poorly implemented hardware. 412 */ 413 414 /* Write #1: write the SLP_TYP data to the PM1 Control registers */ 415 416 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 417 if (ACPI_FAILURE (Status)) 418 { 419 return_ACPI_STATUS (Status); 420 } 421 422 /* Insert the sleep enable (SLP_EN) bit */ 423 424 Pm1aControl |= SleepEnableRegInfo->AccessBitMask; 425 Pm1bControl |= SleepEnableRegInfo->AccessBitMask; 426 427 /* Flush caches, as per ACPI specification */ 428 429 ACPI_FLUSH_CPU_CACHE (); 430 431 /* Write #2: Write both SLP_TYP + SLP_EN */ 432 433 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 434 if (ACPI_FAILURE (Status)) 435 { 436 return_ACPI_STATUS (Status); 437 } 438 439 if (SleepState > ACPI_STATE_S3) 440 { 441 /* 442 * We wanted to sleep > S3, but it didn't happen (by virtue of the 443 * fact that we are still executing!) 444 * 445 * Wait ten seconds, then try again. This is to get S4/S5 to work on 446 * all machines. 447 * 448 * We wait so long to allow chipsets that poll this reg very slowly 449 * to still read the right value. Ideally, this block would go 450 * away entirely. 451 */ 452 AcpiOsStall (10000000); 453 454 Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL, 455 SleepEnableRegInfo->AccessBitMask); 456 if (ACPI_FAILURE (Status)) 457 { 458 return_ACPI_STATUS (Status); 459 } 460 } 461 462 /* Wait until we enter sleep state */ 463 464 do 465 { 466 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 467 if (ACPI_FAILURE (Status)) 468 { 469 return_ACPI_STATUS (Status); 470 } 471 472 /* Spin until we wake */ 473 474 } while (!InValue); 475 476 return_ACPI_STATUS (AE_OK); 477} 478 479ACPI_EXPORT_SYMBOL (AcpiEnterSleepState) 480 481 482/******************************************************************************* 483 * 484 * FUNCTION: AcpiEnterSleepStateS4bios 485 * 486 * PARAMETERS: None 487 * 488 * RETURN: Status 489 * 490 * DESCRIPTION: Perform a S4 bios request. 491 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 492 * 493 ******************************************************************************/ 494 495ACPI_STATUS 496AcpiEnterSleepStateS4bios ( 497 void) 498{ 499 UINT32 InValue; 500 ACPI_STATUS Status; 501 502 503 ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios); 504 505 506 /* Clear the wake status bit (PM1) */ 507 508 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 509 if (ACPI_FAILURE (Status)) 510 { 511 return_ACPI_STATUS (Status); 512 } 513 514 Status = AcpiHwClearAcpiStatus (); 515 if (ACPI_FAILURE (Status)) 516 { 517 return_ACPI_STATUS (Status); 518 } 519 520 /* 521 * 1) Disable/Clear all GPEs 522 * 2) Enable all wakeup GPEs 523 */ 524 Status = AcpiHwDisableAllGpes (); 525 if (ACPI_FAILURE (Status)) 526 { 527 return_ACPI_STATUS (Status); 528 } 529 AcpiGbl_SystemAwakeAndRunning = FALSE; 530 531 Status = AcpiHwEnableAllWakeupGpes (); 532 if (ACPI_FAILURE (Status)) 533 { 534 return_ACPI_STATUS (Status); 535 } 536 537 ACPI_FLUSH_CPU_CACHE (); 538 539 Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 540 (UINT32) AcpiGbl_FADT.S4BiosRequest, 8); 541 542 do { 543 AcpiOsStall(1000); 544 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 545 if (ACPI_FAILURE (Status)) 546 { 547 return_ACPI_STATUS (Status); 548 } 549 } while (!InValue); 550 551 return_ACPI_STATUS (AE_OK); 552} 553 554ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios) 555 556 557/******************************************************************************* 558 * 559 * FUNCTION: AcpiLeaveSleepState 560 * 561 * PARAMETERS: SleepState - Which sleep state we just exited 562 * 563 * RETURN: Status 564 * 565 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep 566 * Called with interrupts ENABLED. 567 * 568 ******************************************************************************/ 569 570ACPI_STATUS 571AcpiLeaveSleepState ( 572 UINT8 SleepState) 573{ 574 ACPI_OBJECT_LIST ArgList; 575 ACPI_OBJECT Arg; 576 ACPI_STATUS Status; 577 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 578 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 579 UINT32 Pm1aControl; 580 UINT32 Pm1bControl; 581 582 583 ACPI_FUNCTION_TRACE (AcpiLeaveSleepState); 584 585 586 /* 587 * Set SLP_TYPE and SLP_EN to state S0. 588 * This is unclear from the ACPI Spec, but it is required 589 * by some machines. 590 */ 591 Status = AcpiGetSleepTypeData (ACPI_STATE_S0, 592 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 593 if (ACPI_SUCCESS (Status)) 594 { 595 SleepTypeRegInfo = 596 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 597 SleepEnableRegInfo = 598 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 599 600 /* Get current value of PM1A control */ 601 602 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 603 &Pm1aControl); 604 if (ACPI_SUCCESS (Status)) 605 { 606 /* Clear the SLP_EN and SLP_TYP fields */ 607 608 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 609 SleepEnableRegInfo->AccessBitMask); 610 Pm1bControl = Pm1aControl; 611 612 /* Insert the SLP_TYP bits */ 613 614 Pm1aControl |= (AcpiGbl_SleepTypeA << 615 SleepTypeRegInfo->BitPosition); 616 Pm1bControl |= (AcpiGbl_SleepTypeB << 617 SleepTypeRegInfo->BitPosition); 618 619 /* Write the control registers and ignore any errors */ 620 621 (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 622 } 623 } 624 625 /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ 626 627 AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; 628 629 /* Setup parameter object */ 630 631 ArgList.Count = 1; 632 ArgList.Pointer = &Arg; 633 Arg.Type = ACPI_TYPE_INTEGER; 634 635 /* Ignore any errors from these methods */ 636 637 Arg.Integer.Value = ACPI_SST_WAKING; 638 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 639 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 640 { 641 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 642 } 643 644 Arg.Integer.Value = SleepState; 645 Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL); 646 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 647 { 648 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS")); 649 } 650 651 Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL); 652 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 653 { 654 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK")); 655 } 656 /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ 657 658 /* 659 * Restore the GPEs: 660 * 1) Disable/Clear all GPEs 661 * 2) Enable all runtime GPEs 662 */ 663 Status = AcpiHwDisableAllGpes (); 664 if (ACPI_FAILURE (Status)) 665 { 666 return_ACPI_STATUS (Status); 667 } 668 AcpiGbl_SystemAwakeAndRunning = TRUE; 669 670 Status = AcpiHwEnableAllRuntimeGpes (); 671 if (ACPI_FAILURE (Status)) 672 { 673 return_ACPI_STATUS (Status); 674 } 675 676 /* Enable power button */ 677 678 (void) AcpiWriteBitRegister( 679 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId, 680 ACPI_ENABLE_EVENT); 681 682 (void) AcpiWriteBitRegister( 683 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId, 684 ACPI_CLEAR_STATUS); 685 686 /* Enable BM arbitration */ 687 688 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0); 689 if (ACPI_FAILURE (Status)) 690 { 691 return_ACPI_STATUS (Status); 692 } 693 694 Arg.Integer.Value = ACPI_SST_WORKING; 695 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 696 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 697 { 698 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 699 } 700 701 return_ACPI_STATUS (Status); 702} 703 704ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState) 705 706