hwsleep.c revision 151937
1 2/****************************************************************************** 3 * 4 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface 5 * $Revision: 1.77 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#include <contrib/dev/acpica/acpi.h> 119 120#define _COMPONENT ACPI_HARDWARE 121 ACPI_MODULE_NAME ("hwsleep") 122 123 124/******************************************************************************* 125 * 126 * FUNCTION: AcpiSetFirmwareWakingVector 127 * 128 * PARAMETERS: PhysicalAddress - Physical address of ACPI real mode 129 * entry point. 130 * 131 * RETURN: Status 132 * 133 * DESCRIPTION: Access function for the FirmwareWakingVector field in FACS 134 * 135 ******************************************************************************/ 136 137ACPI_STATUS 138AcpiSetFirmwareWakingVector ( 139 ACPI_PHYSICAL_ADDRESS PhysicalAddress) 140{ 141 142 ACPI_FUNCTION_TRACE ("AcpiSetFirmwareWakingVector"); 143 144 145 /* Set the vector */ 146 147 if (AcpiGbl_CommonFACS.VectorWidth == 32) 148 { 149 *(ACPI_CAST_PTR (UINT32, AcpiGbl_CommonFACS.FirmwareWakingVector)) 150 = (UINT32) PhysicalAddress; 151 } 152 else 153 { 154 *AcpiGbl_CommonFACS.FirmwareWakingVector 155 = PhysicalAddress; 156 } 157 158 return_ACPI_STATUS (AE_OK); 159} 160 161 162/******************************************************************************* 163 * 164 * FUNCTION: AcpiGetFirmwareWakingVector 165 * 166 * PARAMETERS: *PhysicalAddress - Where the contents of 167 * the FirmwareWakingVector field of 168 * the FACS will be returned. 169 * 170 * RETURN: Status, vector 171 * 172 * DESCRIPTION: Access function for the FirmwareWakingVector field in FACS 173 * 174 ******************************************************************************/ 175 176ACPI_STATUS 177AcpiGetFirmwareWakingVector ( 178 ACPI_PHYSICAL_ADDRESS *PhysicalAddress) 179{ 180 181 ACPI_FUNCTION_TRACE ("AcpiGetFirmwareWakingVector"); 182 183 184 if (!PhysicalAddress) 185 { 186 return_ACPI_STATUS (AE_BAD_PARAMETER); 187 } 188 189 /* Get the vector */ 190 191 if (AcpiGbl_CommonFACS.VectorWidth == 32) 192 { 193 *PhysicalAddress = (ACPI_PHYSICAL_ADDRESS) 194 *(ACPI_CAST_PTR (UINT32, AcpiGbl_CommonFACS.FirmwareWakingVector)); 195 } 196 else 197 { 198 *PhysicalAddress = 199 *AcpiGbl_CommonFACS.FirmwareWakingVector; 200 } 201 202 return_ACPI_STATUS (AE_OK); 203} 204 205 206/******************************************************************************* 207 * 208 * FUNCTION: AcpiEnterSleepStatePrep 209 * 210 * PARAMETERS: SleepState - Which sleep state to enter 211 * 212 * RETURN: Status 213 * 214 * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) 215 * This function must execute with interrupts enabled. 216 * We break sleeping into 2 stages so that OSPM can handle 217 * various OS-specific tasks between the two steps. 218 * 219 ******************************************************************************/ 220 221ACPI_STATUS 222AcpiEnterSleepStatePrep ( 223 UINT8 SleepState) 224{ 225 ACPI_STATUS Status; 226 ACPI_OBJECT_LIST ArgList; 227 ACPI_OBJECT Arg; 228 229 230 ACPI_FUNCTION_TRACE ("AcpiEnterSleepStatePrep"); 231 232 233 /* 234 * _PSW methods could be run here to enable wake-on keyboard, LAN, etc. 235 */ 236 Status = AcpiGetSleepTypeData (SleepState, 237 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 238 if (ACPI_FAILURE (Status)) 239 { 240 return_ACPI_STATUS (Status); 241 } 242 243 /* Setup parameter object */ 244 245 ArgList.Count = 1; 246 ArgList.Pointer = &Arg; 247 248 Arg.Type = ACPI_TYPE_INTEGER; 249 Arg.Integer.Value = SleepState; 250 251 /* Run the _PTS and _GTS methods */ 252 253 Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL); 254 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 255 { 256 return_ACPI_STATUS (Status); 257 } 258 259 Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL); 260 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 261 { 262 return_ACPI_STATUS (Status); 263 } 264 265 /* Setup the argument to _SST */ 266 267 switch (SleepState) 268 { 269 case ACPI_STATE_S0: 270 Arg.Integer.Value = ACPI_SST_WORKING; 271 break; 272 273 case ACPI_STATE_S1: 274 case ACPI_STATE_S2: 275 case ACPI_STATE_S3: 276 Arg.Integer.Value = ACPI_SST_SLEEPING; 277 break; 278 279 case ACPI_STATE_S4: 280 Arg.Integer.Value = ACPI_SST_SLEEP_CONTEXT; 281 break; 282 283 default: 284 Arg.Integer.Value = ACPI_SST_INDICATOR_OFF; /* Default is off */ 285 break; 286 } 287 288 /* Set the system indicators to show the desired sleep state. */ 289 290 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 291 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 292 { 293 ACPI_REPORT_ERROR (("Method _SST failed, %s\n", 294 AcpiFormatException (Status))); 295 } 296 297 return_ACPI_STATUS (AE_OK); 298} 299 300 301/******************************************************************************* 302 * 303 * FUNCTION: AcpiEnterSleepState 304 * 305 * PARAMETERS: SleepState - Which sleep state to enter 306 * 307 * RETURN: Status 308 * 309 * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) 310 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 311 * 312 ******************************************************************************/ 313 314ACPI_STATUS 315AcpiEnterSleepState ( 316 UINT8 SleepState) 317{ 318 UINT32 PM1AControl; 319 UINT32 PM1BControl; 320 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 321 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 322 UINT32 InValue; 323 ACPI_STATUS Status; 324 325 326 ACPI_FUNCTION_TRACE ("AcpiEnterSleepState"); 327 328 329 if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) || 330 (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX)) 331 { 332 ACPI_REPORT_ERROR (("Sleep values out of range: A=%X B=%X\n", 333 AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB)); 334 return_ACPI_STATUS (AE_AML_OPERAND_VALUE); 335 } 336 337 SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE_A); 338 SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 339 340 /* Clear wake status */ 341 342 Status = AcpiSetRegister (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK); 343 if (ACPI_FAILURE (Status)) 344 { 345 return_ACPI_STATUS (Status); 346 } 347 348 /* Clear all fixed and general purpose status bits */ 349 350 Status = AcpiHwClearAcpiStatus (ACPI_MTX_DO_NOT_LOCK); 351 if (ACPI_FAILURE (Status)) 352 { 353 return_ACPI_STATUS (Status); 354 } 355 356 if (SleepState != ACPI_STATE_S5) 357 { 358 /* Disable BM arbitration */ 359 360 Status = AcpiSetRegister (ACPI_BITREG_ARB_DISABLE, 361 1, ACPI_MTX_DO_NOT_LOCK); 362 if (ACPI_FAILURE (Status)) 363 { 364 return_ACPI_STATUS (Status); 365 } 366 } 367 368 /* 369 * 1) Disable/Clear all GPEs 370 * 2) Enable all wakeup GPEs 371 */ 372 Status = AcpiHwDisableAllGpes (); 373 if (ACPI_FAILURE (Status)) 374 { 375 return_ACPI_STATUS (Status); 376 } 377 AcpiGbl_SystemAwakeAndRunning = FALSE; 378 379 Status = AcpiHwEnableAllWakeupGpes (); 380 if (ACPI_FAILURE (Status)) 381 { 382 return_ACPI_STATUS (Status); 383 } 384 385 /* Get current value of PM1A control */ 386 387 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 388 ACPI_REGISTER_PM1_CONTROL, &PM1AControl); 389 if (ACPI_FAILURE (Status)) 390 { 391 return_ACPI_STATUS (Status); 392 } 393 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 394 "Entering sleep state [S%d]\n", SleepState)); 395 396 /* Clear SLP_EN and SLP_TYP fields */ 397 398 PM1AControl &= ~(SleepTypeRegInfo->AccessBitMask | 399 SleepEnableRegInfo->AccessBitMask); 400 PM1BControl = PM1AControl; 401 402 /* Insert SLP_TYP bits */ 403 404 PM1AControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition); 405 PM1BControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition); 406 407 /* 408 * We split the writes of SLP_TYP and SLP_EN to workaround 409 * poorly implemented hardware. 410 */ 411 412 /* Write #1: fill in SLP_TYP data */ 413 414 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 415 ACPI_REGISTER_PM1A_CONTROL, PM1AControl); 416 if (ACPI_FAILURE (Status)) 417 { 418 return_ACPI_STATUS (Status); 419 } 420 421 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 422 ACPI_REGISTER_PM1B_CONTROL, PM1BControl); 423 if (ACPI_FAILURE (Status)) 424 { 425 return_ACPI_STATUS (Status); 426 } 427 428 /* Insert SLP_ENABLE bit */ 429 430 PM1AControl |= SleepEnableRegInfo->AccessBitMask; 431 PM1BControl |= SleepEnableRegInfo->AccessBitMask; 432 433 /* Write #2: SLP_TYP + SLP_EN */ 434 435 ACPI_FLUSH_CPU_CACHE (); 436 437 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 438 ACPI_REGISTER_PM1A_CONTROL, PM1AControl); 439 if (ACPI_FAILURE (Status)) 440 { 441 return_ACPI_STATUS (Status); 442 } 443 444 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 445 ACPI_REGISTER_PM1B_CONTROL, PM1BControl); 446 if (ACPI_FAILURE (Status)) 447 { 448 return_ACPI_STATUS (Status); 449 } 450 451 if (SleepState > ACPI_STATE_S3) 452 { 453 /* 454 * We wanted to sleep > S3, but it didn't happen (by virtue of the 455 * fact that we are still executing!) 456 * 457 * Wait ten seconds, then try again. This is to get S4/S5 to work on 458 * all machines. 459 * 460 * We wait so long to allow chipsets that poll this reg very slowly to 461 * still read the right value. Ideally, this block would go 462 * away entirely. 463 */ 464 AcpiOsStall (10000000); 465 466 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 467 ACPI_REGISTER_PM1_CONTROL, 468 SleepEnableRegInfo->AccessBitMask); 469 if (ACPI_FAILURE (Status)) 470 { 471 return_ACPI_STATUS (Status); 472 } 473 } 474 475 /* Wait until we enter sleep state */ 476 477 do 478 { 479 Status = AcpiGetRegister (ACPI_BITREG_WAKE_STATUS, &InValue, 480 ACPI_MTX_DO_NOT_LOCK); 481 if (ACPI_FAILURE (Status)) 482 { 483 return_ACPI_STATUS (Status); 484 } 485 486 /* Spin until we wake */ 487 488 } while (!InValue); 489 490 return_ACPI_STATUS (AE_OK); 491} 492 493 494/******************************************************************************* 495 * 496 * FUNCTION: AcpiEnterSleepStateS4bios 497 * 498 * PARAMETERS: None 499 * 500 * RETURN: Status 501 * 502 * DESCRIPTION: Perform a S4 bios request. 503 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 504 * 505 ******************************************************************************/ 506 507ACPI_STATUS 508AcpiEnterSleepStateS4bios ( 509 void) 510{ 511 UINT32 InValue; 512 ACPI_STATUS Status; 513 514 515 ACPI_FUNCTION_TRACE ("AcpiEnterSleepStateS4bios"); 516 517 518 Status = AcpiSetRegister (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK); 519 if (ACPI_FAILURE (Status)) 520 { 521 return_ACPI_STATUS (Status); 522 } 523 524 Status = AcpiHwClearAcpiStatus (ACPI_MTX_DO_NOT_LOCK); 525 if (ACPI_FAILURE (Status)) 526 { 527 return_ACPI_STATUS (Status); 528 } 529 530 /* 531 * 1) Disable/Clear all GPEs 532 * 2) Enable all wakeup GPEs 533 */ 534 Status = AcpiHwDisableAllGpes (); 535 if (ACPI_FAILURE (Status)) 536 { 537 return_ACPI_STATUS (Status); 538 } 539 AcpiGbl_SystemAwakeAndRunning = FALSE; 540 541 Status = AcpiHwEnableAllWakeupGpes (); 542 if (ACPI_FAILURE (Status)) 543 { 544 return_ACPI_STATUS (Status); 545 } 546 547 ACPI_FLUSH_CPU_CACHE (); 548 549 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, 550 (UINT32) AcpiGbl_FADT->S4BiosReq, 8); 551 552 do { 553 AcpiOsStall(1000); 554 Status = AcpiGetRegister (ACPI_BITREG_WAKE_STATUS, &InValue, 555 ACPI_MTX_DO_NOT_LOCK); 556 if (ACPI_FAILURE (Status)) 557 { 558 return_ACPI_STATUS (Status); 559 } 560 } while (!InValue); 561 562 return_ACPI_STATUS (AE_OK); 563} 564 565 566/******************************************************************************* 567 * 568 * FUNCTION: AcpiLeaveSleepState 569 * 570 * PARAMETERS: SleepState - Which sleep state we just exited 571 * 572 * RETURN: Status 573 * 574 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep 575 * Called with interrupts ENABLED. 576 * 577 ******************************************************************************/ 578 579ACPI_STATUS 580AcpiLeaveSleepState ( 581 UINT8 SleepState) 582{ 583 ACPI_OBJECT_LIST ArgList; 584 ACPI_OBJECT Arg; 585 ACPI_STATUS Status; 586 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 587 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 588 UINT32 PM1AControl; 589 UINT32 PM1BControl; 590 591 592 ACPI_FUNCTION_TRACE ("AcpiLeaveSleepState"); 593 594 595 /* 596 * Set SLP_TYPE and SLP_EN to state S0. 597 * This is unclear from the ACPI Spec, but it is required 598 * by some machines. 599 */ 600 Status = AcpiGetSleepTypeData (ACPI_STATE_S0, 601 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 602 if (ACPI_SUCCESS (Status)) 603 { 604 SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE_A); 605 SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 606 607 /* Get current value of PM1A control */ 608 609 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, 610 ACPI_REGISTER_PM1_CONTROL, &PM1AControl); 611 if (ACPI_SUCCESS (Status)) 612 { 613 /* Clear SLP_EN and SLP_TYP fields */ 614 615 PM1AControl &= ~(SleepTypeRegInfo->AccessBitMask | 616 SleepEnableRegInfo->AccessBitMask); 617 PM1BControl = PM1AControl; 618 619 /* Insert SLP_TYP bits */ 620 621 PM1AControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition); 622 PM1BControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition); 623 624 /* Just ignore any errors */ 625 626 (void) AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 627 ACPI_REGISTER_PM1A_CONTROL, PM1AControl); 628 (void) AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, 629 ACPI_REGISTER_PM1B_CONTROL, PM1BControl); 630 } 631 } 632 633 /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ 634 635 AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; 636 637 /* Setup parameter object */ 638 639 ArgList.Count = 1; 640 ArgList.Pointer = &Arg; 641 Arg.Type = ACPI_TYPE_INTEGER; 642 643 /* Ignore any errors from these methods */ 644 645 Arg.Integer.Value = ACPI_SST_WAKING; 646 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 647 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 648 { 649 ACPI_REPORT_ERROR (("Method _SST failed, %s\n", 650 AcpiFormatException (Status))); 651 } 652 653 Arg.Integer.Value = SleepState; 654 Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL); 655 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 656 { 657 ACPI_REPORT_ERROR (("Method _BFS failed, %s\n", 658 AcpiFormatException (Status))); 659 } 660 661 Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL); 662 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 663 { 664 ACPI_REPORT_ERROR (("Method _WAK failed, %s\n", 665 AcpiFormatException (Status))); 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) AcpiSetRegister( 690 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId, 691 1, ACPI_MTX_DO_NOT_LOCK); 692 693 (void) AcpiSetRegister( 694 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId, 695 1, ACPI_MTX_DO_NOT_LOCK); 696 697 /* Enable BM arbitration */ 698 699 Status = AcpiSetRegister (ACPI_BITREG_ARB_DISABLE, 0, ACPI_MTX_LOCK); 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_REPORT_ERROR (("Method _SST failed, %s\n", 710 AcpiFormatException (Status))); 711 } 712 713 return_ACPI_STATUS (Status); 714} 715