hwxface.c revision 193335
143410Snewton 243410Snewton/****************************************************************************** 343410Snewton * 443410Snewton * Module Name: hwxface - Public ACPICA hardware interfaces 543410Snewton * 643410Snewton *****************************************************************************/ 743410Snewton 843410Snewton/****************************************************************************** 943410Snewton * 1043410Snewton * 1. Copyright Notice 1143410Snewton * 1243410Snewton * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 1343410Snewton * All rights reserved. 1443410Snewton * 1543410Snewton * 2. License 1643410Snewton * 1743410Snewton * 2.1. This is your license from Intel Corp. under its intellectual property 1843410Snewton * rights. You may have additional license terms from the party that provided 1943410Snewton * you this software, covering your right to use that party's intellectual 2043410Snewton * property rights. 2143410Snewton * 2243410Snewton * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2343410Snewton * copy of the source code appearing in this file ("Covered Code") an 2443410Snewton * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2543410Snewton * base code distributed originally by Intel ("Original Intel Code") to copy, 2643410Snewton * make derivatives, distribute, use and display any portion of the Covered 2743410Snewton * Code in any form, with the right to sublicense such rights; and 2843410Snewton * 2943410Snewton * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3043410Snewton * license (with the right to sublicense), under only those claims of Intel 3143410Snewton * patents that are infringed by the Original Intel Code, to make, use, sell, 3249263Snewton * offer to sell, and import the Covered Code and derivative works thereof 3350477Speter * solely to the minimum extent necessary to exercise the above copyright 3443410Snewton * license, and in no event shall the patent license extend to any additions 3543410Snewton * to or modifications of the Original Intel Code. No other license or right 3643410Snewton * is granted directly or by implication, estoppel or otherwise; 3743410Snewton * 3843410Snewton * The above copyright and patent license is granted only if the following 3943410Snewton * conditions are met: 4043410Snewton * 4143410Snewton * 3. Conditions 4243410Snewton * 4343410Snewton * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4443410Snewton * Redistribution of source code of any substantial portion of the Covered 4543410Snewton * Code or modification with rights to further distribute source must include 4643410Snewton * the above Copyright Notice, the above License, this list of Conditions, 4743410Snewton * and the following Disclaimer and Export Compliance provision. In addition, 4843410Snewton * Licensee must cause all Covered Code to which Licensee contributes to 4943410Snewton * contain a file documenting the changes Licensee made to create that Covered 5043410Snewton * Code and the date of any change. Licensee must include in that file the 5143410Snewton * documentation of any changes made by any predecessor Licensee. Licensee 5243410Snewton * must include a prominent statement that the modification is derived, 5343410Snewton * directly or indirectly, from Original Intel Code. 5443410Snewton * 5543410Snewton * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5643410Snewton * Redistribution of source code of any substantial portion of the Covered 5765314Sobrien * Code or modification without rights to further distribute source must 5865314Sobrien * include the following Disclaimer and Export Compliance provision in the 5965314Sobrien * documentation and/or other materials provided with distribution. In 6065314Sobrien * addition, Licensee may not authorize further sublicense of source of any 6165314Sobrien * portion of the Covered Code, and must include terms to the effect that the 6265314Sobrien * license from Licensee to its licensee is limited to the intellectual 6343410Snewton * property embodied in the software Licensee provides to its licensee, and 6492739Salfred * not to intellectual property embodied in modifications its licensee may 6592739Salfred * make. 6643410Snewton * 6743410Snewton * 3.3. Redistribution of Executable. Redistribution in executable form of any 68115550Sphk * substantial portion of the Covered Code or modification must reproduce the 6943410Snewton * above Copyright Notice, and the following Disclaimer and Export Compliance 7043410Snewton * provision in the documentation and/or other materials provided with the 7143410Snewton * distribution. 7243410Snewton * 7343410Snewton * 3.4. Intel retains all right, title, and interest in and to the Original 7443410Snewton * Intel Code. 7543410Snewton * 7643410Snewton * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7743410Snewton * Intel shall be used in advertising or otherwise to promote the sale, use or 7843410Snewton * other dealings in products derived from or relating to the Covered Code 7943410Snewton * without prior written authorization from Intel. 8043410Snewton * 8143410Snewton * 4. Disclaimer and Export Compliance 8243410Snewton * 8343410Snewton * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8443410Snewton * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8543410Snewton * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8643410Snewton * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8743410Snewton * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8843410Snewton * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8989059Smsmith * PARTICULAR PURPOSE. 9052114Snewton * 9152114Snewton * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9243410Snewton * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93108235Sphk * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9472521Sjlemon * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9543410Snewton * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9643410Snewton * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9743410Snewton * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9843410Snewton * LIMITED REMEDY. 99111815Sphk * 100111815Sphk * 4.3. Licensee shall not export, either directly or indirectly, any of this 101111815Sphk * software or system incorporating such software without first obtaining any 10247625Sphk * required license or other approval from the U. S. Department of Commerce or 10343410Snewton * any other agency or department of the United States Government. In the 10443410Snewton * event Licensee exports any such software from the United States or 10543410Snewton * re-exports any such software from a foreign destination, Licensee shall 10643410Snewton * ensure that the distribution and export/re-export of the software is in 10743410Snewton * compliance with all laws, regulations, orders, or other restrictions of the 10843410Snewton * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10943410Snewton * any of its subsidiaries will export/re-export any technical data, process, 11043410Snewton * software, or service, directly or indirectly, to any country for which the 11143410Snewton * United States government or any agency thereof requires an export license, 11244208Snewton * other governmental approval, or letter of assurance, without first obtaining 11344208Snewton * such license, approval or letter. 11444208Snewton * 11544208Snewton *****************************************************************************/ 11644208Snewton 11749344Snewton#include "acpi.h" 11852114Snewton#include "accommon.h" 11952114Snewton#include "acnamesp.h" 12052114Snewton 12152114Snewton#define _COMPONENT ACPI_HARDWARE 12252114Snewton ACPI_MODULE_NAME ("hwxface") 12352114Snewton 12452114Snewton 12552114Snewton/****************************************************************************** 12652114Snewton * 12752114Snewton * FUNCTION: AcpiReset 12852114Snewton * 12952114Snewton * PARAMETERS: None 13052114Snewton * 13152114Snewton * RETURN: Status 13252114Snewton * 13352114Snewton * DESCRIPTION: Set reset register in memory or IO space. Note: Does not 13452114Snewton * support reset register in PCI config space, this must be 13552114Snewton * handled separately. 13652114Snewton * 13752114Snewton ******************************************************************************/ 13852114Snewton 13952114SnewtonACPI_STATUS 14052114SnewtonAcpiReset ( 14152114Snewton void) 14252114Snewton{ 14352114Snewton ACPI_GENERIC_ADDRESS *ResetReg; 14452114Snewton ACPI_STATUS Status; 14544208Snewton 14644208Snewton 14749344Snewton ACPI_FUNCTION_TRACE (AcpiReset); 14853000Sphk 14953000Sphk 15053000Sphk ResetReg = &AcpiGbl_FADT.ResetRegister; 15153000Sphk 15253000Sphk /* Check if the reset register is supported */ 15353000Sphk 15453000Sphk if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) || 15553000Sphk !ResetReg->Address) 15653000Sphk { 15753000Sphk return_ACPI_STATUS (AE_NOT_EXIST); 15852114Snewton } 15944208Snewton 16044208Snewton /* Write the reset value to the reset register */ 16144208Snewton 16244208Snewton Status = AcpiWrite (AcpiGbl_FADT.ResetValue, ResetReg); 16344208Snewton return_ACPI_STATUS (Status); 16444208Snewton} 16544208Snewton 16644208SnewtonACPI_EXPORT_SYMBOL (AcpiReset) 16744208Snewton 16844208Snewton 16944208Snewton/****************************************************************************** 17044208Snewton * 17144208Snewton * FUNCTION: AcpiRead 17260060Sgreen * 17344208Snewton * PARAMETERS: Value - Where the value is returned 17443410Snewton * Reg - GAS register structure 17543410Snewton * 17643410Snewton * RETURN: Status 17743410Snewton * 17843410Snewton * DESCRIPTION: Read from either memory or IO space. 17943410Snewton * 18043410Snewton ******************************************************************************/ 18143410Snewton 18283366SjulianACPI_STATUS 18343410SnewtonAcpiRead ( 18443410Snewton UINT32 *Value, 18543410Snewton ACPI_GENERIC_ADDRESS *Reg) 18643410Snewton{ 18743410Snewton UINT32 Width; 18843410Snewton UINT64 Address; 18943410Snewton ACPI_STATUS Status; 19083366Sjulian 19143410Snewton 19271448Sjhb ACPI_FUNCTION_NAME (AcpiRead); 19383366Sjulian 19471448Sjhb 19543410Snewton /* 19671448Sjhb * Must have a valid pointer to a GAS structure, and a non-zero address 19771448Sjhb * within. 19843410Snewton */ 19943410Snewton if (!Reg) 20043410Snewton { 20143410Snewton return (AE_BAD_PARAMETER); 20243410Snewton } 20343410Snewton 20443410Snewton /* Get a local copy of the address. Handles possible alignment issues */ 20543410Snewton 20643410Snewton ACPI_MOVE_64_TO_64 (&Address, &Reg->Address); 20743410Snewton if (!Address) 20843410Snewton { 20943410Snewton return (AE_BAD_ADDRESS); 21043410Snewton } 21143410Snewton 21243410Snewton /* Supported widths are 8/16/32 */ 21343410Snewton 21443410Snewton Width = Reg->BitWidth; 21543410Snewton if ((Width != 8) && (Width != 16) && (Width != 32)) 21643410Snewton { 21743410Snewton return (AE_SUPPORT); 21843410Snewton } 21943410Snewton 22043410Snewton /* Initialize entire 32-bit return value to zero */ 22143410Snewton 22243410Snewton *Value = 0; 22343410Snewton 22443410Snewton /* 22543410Snewton * Two address spaces supported: Memory or IO. PCI_Config is 22643410Snewton * not supported here because the GAS structure is insufficient 22743410Snewton */ 22843410Snewton switch (Reg->SpaceId) 22943410Snewton { 23043410Snewton case ACPI_ADR_SPACE_SYSTEM_MEMORY: 23143410Snewton 23243410Snewton Status = AcpiOsReadMemory ( 23343410Snewton (ACPI_PHYSICAL_ADDRESS) Address, Value, Width); 23443410Snewton break; 23543410Snewton 23643410Snewton 23743410Snewton case ACPI_ADR_SPACE_SYSTEM_IO: 23843410Snewton 23983366Sjulian Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address, Value, Width); 24043410Snewton break; 24143410Snewton 24243410Snewton 24343410Snewton default: 24443410Snewton ACPI_ERROR ((AE_INFO, 24583366Sjulian "Unsupported address space: %X", Reg->SpaceId)); 24643410Snewton return (AE_BAD_PARAMETER); 24743410Snewton } 24888739Srwatson 24991406Sjhb ACPI_DEBUG_PRINT ((ACPI_DB_IO, 25089306Salfred "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n", 25143410Snewton *Value, Width, ACPI_FORMAT_UINT64 (Address), 25289306Salfred AcpiUtGetRegionName (Reg->SpaceId))); 25343410Snewton 25443410Snewton return (Status); 25543410Snewton} 25643410Snewton 25789306SalfredACPI_EXPORT_SYMBOL (AcpiRead) 258109153Sdillon 25943410Snewton 26049413Sgreen/****************************************************************************** 26143410Snewton * 26289306Salfred * FUNCTION: AcpiWrite 26343410Snewton * 26443410Snewton * PARAMETERS: Value - To be written 26571448Sjhb * Reg - GAS register structure 26683366Sjulian * 26771448Sjhb * RETURN: Status 26843410Snewton * 26943410Snewton * DESCRIPTION: Write to either memory or IO space. 27043410Snewton * 27143410Snewton ******************************************************************************/ 27283366Sjulian 27383366SjulianACPI_STATUS 27443410SnewtonAcpiWrite ( 27583366Sjulian UINT32 Value, 27643410Snewton ACPI_GENERIC_ADDRESS *Reg) 27743410Snewton{ 27843410Snewton UINT32 Width; 27943410Snewton UINT64 Address; 28043410Snewton ACPI_STATUS Status; 28143410Snewton 28243410Snewton 28343410Snewton ACPI_FUNCTION_NAME (AcpiWrite); 28443410Snewton 28543410Snewton 28643410Snewton /* 28743410Snewton * Must have a valid pointer to a GAS structure, and a non-zero address 28843410Snewton * within. 28943410Snewton */ 29043410Snewton if (!Reg) 29143410Snewton { 29243410Snewton return (AE_BAD_PARAMETER); 29343410Snewton } 29443410Snewton 29543410Snewton /* Get a local copy of the address. Handles possible alignment issues */ 29643410Snewton 29743410Snewton ACPI_MOVE_64_TO_64 (&Address, &Reg->Address); 29843410Snewton if (!Address) 299107849Salfred { 300107849Salfred return (AE_BAD_ADDRESS); 301107849Salfred } 30243410Snewton 30343410Snewton /* Supported widths are 8/16/32 */ 30443410Snewton 30543410Snewton Width = Reg->BitWidth; 30643410Snewton if ((Width != 8) && (Width != 16) && (Width != 32)) 30743410Snewton { 30843410Snewton return (AE_SUPPORT); 30943410Snewton } 31083366Sjulian 31143410Snewton /* 31243410Snewton * Two address spaces supported: Memory or IO. 31343410Snewton * PCI_Config is not supported here because the GAS struct is insufficient 31443410Snewton */ 31571448Sjhb switch (Reg->SpaceId) 31683366Sjulian { 31771448Sjhb case ACPI_ADR_SPACE_SYSTEM_MEMORY: 31843410Snewton 31943410Snewton Status = AcpiOsWriteMemory ( 32043410Snewton (ACPI_PHYSICAL_ADDRESS) Address, Value, Width); 32143410Snewton break; 32243410Snewton 32343410Snewton 32443410Snewton case ACPI_ADR_SPACE_SYSTEM_IO: 32543410Snewton 32643410Snewton Status = AcpiHwWritePort ( 32743410Snewton (ACPI_IO_ADDRESS) Address, Value, Width); 32843410Snewton break; 32943410Snewton 33043410Snewton 33143410Snewton default: 33243410Snewton ACPI_ERROR ((AE_INFO, 33343410Snewton "Unsupported address space: %X", Reg->SpaceId)); 33443410Snewton return (AE_BAD_PARAMETER); 33543410Snewton } 33643410Snewton 33743410Snewton ACPI_DEBUG_PRINT ((ACPI_DB_IO, 33843410Snewton "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n", 33943410Snewton Value, Width, ACPI_FORMAT_UINT64 (Address), 34043410Snewton AcpiUtGetRegionName (Reg->SpaceId))); 341109153Sdillon 34243410Snewton return (Status); 34389306Salfred} 34489306Salfred 34589306SalfredACPI_EXPORT_SYMBOL (AcpiWrite) 34689306Salfred 34743410Snewton 34889306Salfred/******************************************************************************* 34943410Snewton * 35043410Snewton * FUNCTION: AcpiReadBitRegister 351111119Simp * 35243410Snewton * PARAMETERS: RegisterId - ID of ACPI Bit Register to access 35343410Snewton * ReturnValue - Value that was read from the register, 35443410Snewton * normalized to bit position zero. 35543410Snewton * 35689306Salfred * RETURN: Status and the value read from the specified Register. Value 35789306Salfred * returned is normalized to bit0 (is shifted all the way right) 35889306Salfred * 35989306Salfred * DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock. 36089306Salfred * 36189306Salfred * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and 36289306Salfred * PM2 Control. 36389306Salfred * 36489306Salfred * Note: The hardware lock is not required when reading the ACPI bit registers 36589306Salfred * since almost all of them are single bit and it does not matter that 36689306Salfred * the parent hardware register can be split across two physical 36789306Salfred * registers. The only multi-bit field is SLP_TYP in the PM1 control 36889306Salfred * register, but this field does not cross an 8-bit boundary (nor does 36943410Snewton * it make much sense to actually read this field.) 37043410Snewton * 37143410Snewton ******************************************************************************/ 37243410Snewton 37343410SnewtonACPI_STATUS 37443410SnewtonAcpiReadBitRegister ( 37543410Snewton UINT32 RegisterId, 37643410Snewton UINT32 *ReturnValue) 37743410Snewton{ 37843410Snewton ACPI_BIT_REGISTER_INFO *BitRegInfo; 379109153Sdillon UINT32 RegisterValue; 38043410Snewton UINT32 Value; 38171448Sjhb ACPI_STATUS Status; 38271448Sjhb 38371448Sjhb 38471448Sjhb ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId); 38571448Sjhb 38643410Snewton 38743410Snewton /* Get the info structure corresponding to the requested ACPI Register */ 38843410Snewton 38971448Sjhb BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 39043410Snewton if (!BitRegInfo) 39143410Snewton { 39243410Snewton return_ACPI_STATUS (AE_BAD_PARAMETER); 39385653Sdillon } 39443410Snewton 39543410Snewton /* Read the entire parent register */ 39643410Snewton 39743410Snewton Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister, 39843410Snewton &RegisterValue); 39943410Snewton if (ACPI_FAILURE (Status)) 40083366Sjulian { 40143410Snewton return_ACPI_STATUS (Status); 402109153Sdillon } 40343410Snewton 40443410Snewton /* Normalize the value that was read, mask off other bits */ 40543410Snewton 40683366Sjulian Value = ((RegisterValue & BitRegInfo->AccessBitMask) 40743410Snewton >> BitRegInfo->BitPosition); 40883366Sjulian 40943410Snewton ACPI_DEBUG_PRINT ((ACPI_DB_IO, 410 "BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n", 411 RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value)); 412 413 *ReturnValue = Value; 414 return_ACPI_STATUS (AE_OK); 415} 416 417ACPI_EXPORT_SYMBOL (AcpiReadBitRegister) 418 419 420/******************************************************************************* 421 * 422 * FUNCTION: AcpiWriteBitRegister 423 * 424 * PARAMETERS: RegisterId - ID of ACPI Bit Register to access 425 * Value - Value to write to the register, in bit 426 * position zero. The bit is automaticallly 427 * shifted to the correct position. 428 * 429 * RETURN: Status 430 * 431 * DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock 432 * since most operations require a read/modify/write sequence. 433 * 434 * SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and 435 * PM2 Control. 436 * 437 * Note that at this level, the fact that there may be actually two 438 * hardware registers (A and B - and B may not exist) is abstracted. 439 * 440 ******************************************************************************/ 441 442ACPI_STATUS 443AcpiWriteBitRegister ( 444 UINT32 RegisterId, 445 UINT32 Value) 446{ 447 ACPI_BIT_REGISTER_INFO *BitRegInfo; 448 ACPI_CPU_FLAGS LockFlags; 449 UINT32 RegisterValue; 450 ACPI_STATUS Status = AE_OK; 451 452 453 ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId); 454 455 456 /* Get the info structure corresponding to the requested ACPI Register */ 457 458 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId); 459 if (!BitRegInfo) 460 { 461 return_ACPI_STATUS (AE_BAD_PARAMETER); 462 } 463 464 LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock); 465 466 /* 467 * At this point, we know that the parent register is one of the 468 * following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control 469 */ 470 if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS) 471 { 472 /* 473 * 1) Case for PM1 Enable, PM1 Control, and PM2 Control 474 * 475 * Perform a register read to preserve the bits that we are not 476 * interested in 477 */ 478 Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister, 479 &RegisterValue); 480 if (ACPI_FAILURE (Status)) 481 { 482 goto UnlockAndExit; 483 } 484 485 /* 486 * Insert the input bit into the value that was just read 487 * and write the register 488 */ 489 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition, 490 BitRegInfo->AccessBitMask, Value); 491 492 Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister, 493 RegisterValue); 494 } 495 else 496 { 497 /* 498 * 2) Case for PM1 Status 499 * 500 * The Status register is different from the rest. Clear an event 501 * by writing 1, writing 0 has no effect. So, the only relevant 502 * information is the single bit we're interested in, all others 503 * should be written as 0 so they will be left unchanged. 504 */ 505 RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value, 506 BitRegInfo->BitPosition, BitRegInfo->AccessBitMask); 507 508 /* No need to write the register if value is all zeros */ 509 510 if (RegisterValue) 511 { 512 Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS, 513 RegisterValue); 514 } 515 } 516 517 ACPI_DEBUG_PRINT ((ACPI_DB_IO, 518 "BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n", 519 RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue)); 520 521 522UnlockAndExit: 523 524 AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags); 525 return_ACPI_STATUS (Status); 526} 527 528ACPI_EXPORT_SYMBOL (AcpiWriteBitRegister) 529 530 531/******************************************************************************* 532 * 533 * FUNCTION: AcpiGetSleepTypeData 534 * 535 * PARAMETERS: SleepState - Numeric sleep state 536 * *SleepTypeA - Where SLP_TYPa is returned 537 * *SleepTypeB - Where SLP_TYPb is returned 538 * 539 * RETURN: Status - ACPI status 540 * 541 * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep 542 * state. 543 * 544 ******************************************************************************/ 545 546ACPI_STATUS 547AcpiGetSleepTypeData ( 548 UINT8 SleepState, 549 UINT8 *SleepTypeA, 550 UINT8 *SleepTypeB) 551{ 552 ACPI_STATUS Status = AE_OK; 553 ACPI_EVALUATE_INFO *Info; 554 555 556 ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData); 557 558 559 /* Validate parameters */ 560 561 if ((SleepState > ACPI_S_STATES_MAX) || 562 !SleepTypeA || 563 !SleepTypeB) 564 { 565 return_ACPI_STATUS (AE_BAD_PARAMETER); 566 } 567 568 /* Allocate the evaluation information block */ 569 570 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 571 if (!Info) 572 { 573 return_ACPI_STATUS (AE_NO_MEMORY); 574 } 575 576 Info->Pathname = ACPI_CAST_PTR (char, AcpiGbl_SleepStateNames[SleepState]); 577 578 /* Evaluate the namespace object containing the values for this state */ 579 580 Status = AcpiNsEvaluate (Info); 581 if (ACPI_FAILURE (Status)) 582 { 583 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 584 "%s while evaluating SleepState [%s]\n", 585 AcpiFormatException (Status), Info->Pathname)); 586 587 goto Cleanup; 588 } 589 590 /* Must have a return object */ 591 592 if (!Info->ReturnObject) 593 { 594 ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]", 595 Info->Pathname)); 596 Status = AE_NOT_EXIST; 597 } 598 599 /* It must be of type Package */ 600 601 else if (Info->ReturnObject->Common.Type != ACPI_TYPE_PACKAGE) 602 { 603 ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package")); 604 Status = AE_AML_OPERAND_TYPE; 605 } 606 607 /* 608 * The package must have at least two elements. NOTE (March 2005): This 609 * goes against the current ACPI spec which defines this object as a 610 * package with one encoded DWORD element. However, existing practice 611 * by BIOS vendors seems to be to have 2 or more elements, at least 612 * one per sleep type (A/B). 613 */ 614 else if (Info->ReturnObject->Package.Count < 2) 615 { 616 ACPI_ERROR ((AE_INFO, 617 "Sleep State return package does not have at least two elements")); 618 Status = AE_AML_NO_OPERAND; 619 } 620 621 /* The first two elements must both be of type Integer */ 622 623 else if (((Info->ReturnObject->Package.Elements[0])->Common.Type 624 != ACPI_TYPE_INTEGER) || 625 ((Info->ReturnObject->Package.Elements[1])->Common.Type 626 != ACPI_TYPE_INTEGER)) 627 { 628 ACPI_ERROR ((AE_INFO, 629 "Sleep State return package elements are not both Integers " 630 "(%s, %s)", 631 AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[0]), 632 AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[1]))); 633 Status = AE_AML_OPERAND_TYPE; 634 } 635 else 636 { 637 /* Valid _Sx_ package size, type, and value */ 638 639 *SleepTypeA = (UINT8) 640 (Info->ReturnObject->Package.Elements[0])->Integer.Value; 641 *SleepTypeB = (UINT8) 642 (Info->ReturnObject->Package.Elements[1])->Integer.Value; 643 } 644 645 if (ACPI_FAILURE (Status)) 646 { 647 ACPI_EXCEPTION ((AE_INFO, Status, 648 "While evaluating SleepState [%s], bad Sleep object %p type %s", 649 Info->Pathname, Info->ReturnObject, 650 AcpiUtGetObjectTypeName (Info->ReturnObject))); 651 } 652 653 AcpiUtRemoveReference (Info->ReturnObject); 654 655Cleanup: 656 ACPI_FREE (Info); 657 return_ACPI_STATUS (Status); 658} 659 660ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData) 661