hwsleep.c revision 204773
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 - 2010, 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 <contrib/dev/acpica/include/acpi.h> 118#include <contrib/dev/acpica/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=0x%X B=0x%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 /* 350 * Disable BM arbitration. This feature is contained within an 351 * optional register (PM2 Control), so ignore a BAD_ADDRESS 352 * exception. 353 */ 354 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1); 355 if (ACPI_FAILURE (Status) && (Status != AE_BAD_ADDRESS)) 356 { 357 return_ACPI_STATUS (Status); 358 } 359 } 360 361 /* 362 * 1) Disable/Clear all GPEs 363 * 2) Enable all wakeup GPEs 364 */ 365 Status = AcpiHwDisableAllGpes (); 366 if (ACPI_FAILURE (Status)) 367 { 368 return_ACPI_STATUS (Status); 369 } 370 AcpiGbl_SystemAwakeAndRunning = FALSE; 371 372 Status = AcpiHwEnableAllWakeupGpes (); 373 if (ACPI_FAILURE (Status)) 374 { 375 return_ACPI_STATUS (Status); 376 } 377 378 /* Execute the _GTS method (Going To Sleep) */ 379 380 ArgList.Count = 1; 381 ArgList.Pointer = &Arg; 382 Arg.Type = ACPI_TYPE_INTEGER; 383 Arg.Integer.Value = SleepState; 384 385 Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL); 386 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 387 { 388 return_ACPI_STATUS (Status); 389 } 390 391 /* Get current value of PM1A control */ 392 393 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 394 &Pm1aControl); 395 if (ACPI_FAILURE (Status)) 396 { 397 return_ACPI_STATUS (Status); 398 } 399 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 400 "Entering sleep state [S%d]\n", SleepState)); 401 402 /* Clear the SLP_EN and SLP_TYP fields */ 403 404 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 405 SleepEnableRegInfo->AccessBitMask); 406 Pm1bControl = Pm1aControl; 407 408 /* Insert the SLP_TYP bits */ 409 410 Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition); 411 Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition); 412 413 /* 414 * We split the writes of SLP_TYP and SLP_EN to workaround 415 * poorly implemented hardware. 416 */ 417 418 /* Write #1: write the SLP_TYP data to the PM1 Control registers */ 419 420 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 421 if (ACPI_FAILURE (Status)) 422 { 423 return_ACPI_STATUS (Status); 424 } 425 426 /* Insert the sleep enable (SLP_EN) bit */ 427 428 Pm1aControl |= SleepEnableRegInfo->AccessBitMask; 429 Pm1bControl |= SleepEnableRegInfo->AccessBitMask; 430 431 /* Flush caches, as per ACPI specification */ 432 433 ACPI_FLUSH_CPU_CACHE (); 434 435 /* Write #2: Write both SLP_TYP + SLP_EN */ 436 437 Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 438 if (ACPI_FAILURE (Status)) 439 { 440 return_ACPI_STATUS (Status); 441 } 442 443 if (SleepState > ACPI_STATE_S3) 444 { 445 /* 446 * We wanted to sleep > S3, but it didn't happen (by virtue of the 447 * fact that we are still executing!) 448 * 449 * Wait ten seconds, then try again. This is to get S4/S5 to work on 450 * all machines. 451 * 452 * We wait so long to allow chipsets that poll this reg very slowly 453 * to still read the right value. Ideally, this block would go 454 * away entirely. 455 */ 456 AcpiOsStall (10000000); 457 458 Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL, 459 SleepEnableRegInfo->AccessBitMask); 460 if (ACPI_FAILURE (Status)) 461 { 462 return_ACPI_STATUS (Status); 463 } 464 } 465 466 /* Wait until we enter sleep state */ 467 468 Retry = 1000; 469 do 470 { 471 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 472 if (ACPI_FAILURE (Status)) 473 { 474 return_ACPI_STATUS (Status); 475 } 476 477 /* 478 * Some BIOSs don't set WAK_STS at all. Give up waiting after 479 * 1000 retries if it still isn't set. 480 */ 481 if (Retry-- == 0) 482 { 483 break; 484 } 485 486 /* Spin until we wake */ 487 488 } while (!InValue); 489 490 return_ACPI_STATUS (AE_OK); 491} 492 493ACPI_EXPORT_SYMBOL (AcpiEnterSleepState) 494 495 496/******************************************************************************* 497 * 498 * FUNCTION: AcpiEnterSleepStateS4bios 499 * 500 * PARAMETERS: None 501 * 502 * RETURN: Status 503 * 504 * DESCRIPTION: Perform a S4 bios request. 505 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 506 * 507 ******************************************************************************/ 508 509ACPI_STATUS 510AcpiEnterSleepStateS4bios ( 511 void) 512{ 513 UINT32 InValue; 514 ACPI_STATUS Status; 515 516 517 ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios); 518 519 520 /* Clear the wake status bit (PM1) */ 521 522 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 523 if (ACPI_FAILURE (Status)) 524 { 525 return_ACPI_STATUS (Status); 526 } 527 528 Status = AcpiHwClearAcpiStatus (); 529 if (ACPI_FAILURE (Status)) 530 { 531 return_ACPI_STATUS (Status); 532 } 533 534 /* 535 * 1) Disable/Clear all GPEs 536 * 2) Enable all wakeup GPEs 537 */ 538 Status = AcpiHwDisableAllGpes (); 539 if (ACPI_FAILURE (Status)) 540 { 541 return_ACPI_STATUS (Status); 542 } 543 AcpiGbl_SystemAwakeAndRunning = FALSE; 544 545 Status = AcpiHwEnableAllWakeupGpes (); 546 if (ACPI_FAILURE (Status)) 547 { 548 return_ACPI_STATUS (Status); 549 } 550 551 ACPI_FLUSH_CPU_CACHE (); 552 553 Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 554 (UINT32) AcpiGbl_FADT.S4BiosRequest, 8); 555 556 do { 557 AcpiOsStall(1000); 558 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 559 if (ACPI_FAILURE (Status)) 560 { 561 return_ACPI_STATUS (Status); 562 } 563 } while (!InValue); 564 565 return_ACPI_STATUS (AE_OK); 566} 567 568ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios) 569 570 571/******************************************************************************* 572 * 573 * FUNCTION: AcpiLeaveSleepState 574 * 575 * PARAMETERS: SleepState - Which sleep state we just exited 576 * 577 * RETURN: Status 578 * 579 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep 580 * Called with interrupts ENABLED. 581 * 582 ******************************************************************************/ 583 584ACPI_STATUS 585AcpiLeaveSleepState ( 586 UINT8 SleepState) 587{ 588 ACPI_OBJECT_LIST ArgList; 589 ACPI_OBJECT Arg; 590 ACPI_STATUS Status; 591 ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 592 ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 593 UINT32 Pm1aControl; 594 UINT32 Pm1bControl; 595 596 597 ACPI_FUNCTION_TRACE (AcpiLeaveSleepState); 598 599 600 /* 601 * Set SLP_TYPE and SLP_EN to state S0. 602 * This is unclear from the ACPI Spec, but it is required 603 * by some machines. 604 */ 605 Status = AcpiGetSleepTypeData (ACPI_STATE_S0, 606 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 607 if (ACPI_SUCCESS (Status)) 608 { 609 SleepTypeRegInfo = 610 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 611 SleepEnableRegInfo = 612 AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 613 614 /* Get current value of PM1A control */ 615 616 Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 617 &Pm1aControl); 618 if (ACPI_SUCCESS (Status)) 619 { 620 /* Clear the SLP_EN and SLP_TYP fields */ 621 622 Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 623 SleepEnableRegInfo->AccessBitMask); 624 Pm1bControl = Pm1aControl; 625 626 /* Insert the SLP_TYP bits */ 627 628 Pm1aControl |= (AcpiGbl_SleepTypeA << 629 SleepTypeRegInfo->BitPosition); 630 Pm1bControl |= (AcpiGbl_SleepTypeB << 631 SleepTypeRegInfo->BitPosition); 632 633 /* Write the control registers and ignore any errors */ 634 635 (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 636 } 637 } 638 639 /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ 640 641 AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; 642 643 /* Setup parameter object */ 644 645 ArgList.Count = 1; 646 ArgList.Pointer = &Arg; 647 Arg.Type = ACPI_TYPE_INTEGER; 648 649 /* Ignore any errors from these methods */ 650 651 Arg.Integer.Value = ACPI_SST_WAKING; 652 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 653 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 654 { 655 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 656 } 657 658 Arg.Integer.Value = SleepState; 659 Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL); 660 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 661 { 662 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS")); 663 } 664 665 Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL); 666 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 667 { 668 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK")); 669 } 670 /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ 671 672 /* 673 * Restore the GPEs: 674 * 1) Disable/Clear all GPEs 675 * 2) Enable all runtime GPEs 676 */ 677 Status = AcpiHwDisableAllGpes (); 678 if (ACPI_FAILURE (Status)) 679 { 680 return_ACPI_STATUS (Status); 681 } 682 AcpiGbl_SystemAwakeAndRunning = TRUE; 683 684 Status = AcpiHwEnableAllRuntimeGpes (); 685 if (ACPI_FAILURE (Status)) 686 { 687 return_ACPI_STATUS (Status); 688 } 689 690 /* Enable power button */ 691 692 (void) AcpiWriteBitRegister( 693 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId, 694 ACPI_ENABLE_EVENT); 695 696 (void) AcpiWriteBitRegister( 697 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId, 698 ACPI_CLEAR_STATUS); 699 700 /* 701 * Enable BM arbitration. This feature is contained within an 702 * optional register (PM2 Control), so ignore a BAD_ADDRESS 703 * exception. 704 */ 705 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0); 706 if (ACPI_FAILURE (Status) && (Status != AE_BAD_ADDRESS)) 707 { 708 return_ACPI_STATUS (Status); 709 } 710 711 Arg.Integer.Value = ACPI_SST_WORKING; 712 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 713 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 714 { 715 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 716 } 717 718 return_ACPI_STATUS (Status); 719} 720 721ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState) 722 723