711 lines
23 KiB
C
711 lines
23 KiB
C
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/******************************************************************************
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*
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* Module Name: hwxface - Public ACPICA hardware interfaces
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwxface")
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/******************************************************************************
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*
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* FUNCTION: AcpiReset
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Set reset register in memory or IO space. Note: Does not
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* support reset register in PCI config space, this must be
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* handled separately.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiReset (
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void)
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{
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ACPI_GENERIC_ADDRESS *ResetReg;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiReset);
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ResetReg = &AcpiGbl_FADT.ResetRegister;
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/* Check if the reset register is supported */
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if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) ||
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!ResetReg->Address)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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if (ResetReg->SpaceId == ACPI_ADR_SPACE_SYSTEM_IO)
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{
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/*
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* For I/O space, write directly to the OSL. This bypasses the port
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* validation mechanism, which may block a valid write to the reset
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* register.
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*/
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Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address,
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AcpiGbl_FADT.ResetValue, ResetReg->BitWidth);
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}
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else
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{
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/* Write the reset value to the reset register */
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Status = AcpiHwWrite (AcpiGbl_FADT.ResetValue, ResetReg);
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}
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiReset)
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/******************************************************************************
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*
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* FUNCTION: AcpiRead
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*
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* PARAMETERS: Value - Where the value is returned
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* Reg - GAS register structure
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from either memory or IO space.
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*
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* LIMITATIONS: <These limitations also apply to AcpiWrite>
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* BitWidth must be exactly 8, 16, 32, or 64.
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* SpaceID must be SystemMemory or SystemIO.
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* BitOffset and AccessWidth are currently ignored, as there has
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* not been a need to implement these.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRead (
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UINT64 *ReturnValue,
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ACPI_GENERIC_ADDRESS *Reg)
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{
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UINT32 Value;
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UINT32 Width;
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UINT64 Address;
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ACPI_STATUS Status;
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ACPI_FUNCTION_NAME (AcpiRead);
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if (!ReturnValue)
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{
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return (AE_BAD_PARAMETER);
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}
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/* Validate contents of the GAS register. Allow 64-bit transfers */
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Status = AcpiHwValidateRegister (Reg, 64, &Address);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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Width = Reg->BitWidth;
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if (Width == 64)
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{
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Width = 32; /* Break into two 32-bit transfers */
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}
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/* Initialize entire 64-bit return value to zero */
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*ReturnValue = 0;
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Value = 0;
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/*
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* Two address spaces supported: Memory or IO. PCI_Config is
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* not supported here because the GAS structure is insufficient
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*/
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if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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{
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Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
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Address, &Value, Width);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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*ReturnValue = Value;
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if (Reg->BitWidth == 64)
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{
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/* Read the top 32 bits */
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Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
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(Address + 4), &Value, 32);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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*ReturnValue |= ((UINT64) Value << 32);
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}
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}
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else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
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{
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Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
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Address, &Value, Width);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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*ReturnValue = Value;
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if (Reg->BitWidth == 64)
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{
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/* Read the top 32 bits */
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Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
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(Address + 4), &Value, 32);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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*ReturnValue |= ((UINT64) Value << 32);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n",
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ACPI_FORMAT_UINT64 (*ReturnValue), Reg->BitWidth,
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ACPI_FORMAT_UINT64 (Address),
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AcpiUtGetRegionName (Reg->SpaceId)));
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return (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiRead)
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/******************************************************************************
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*
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* FUNCTION: AcpiWrite
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*
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* PARAMETERS: Value - Value to be written
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* Reg - GAS register structure
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write to either memory or IO space.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiWrite (
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UINT64 Value,
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ACPI_GENERIC_ADDRESS *Reg)
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{
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UINT32 Width;
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UINT64 Address;
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ACPI_STATUS Status;
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ACPI_FUNCTION_NAME (AcpiWrite);
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/* Validate contents of the GAS register. Allow 64-bit transfers */
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Status = AcpiHwValidateRegister (Reg, 64, &Address);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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Width = Reg->BitWidth;
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if (Width == 64)
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{
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Width = 32; /* Break into two 32-bit transfers */
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}
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/*
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* Two address spaces supported: Memory or IO. PCI_Config is
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* not supported here because the GAS structure is insufficient
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*/
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if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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{
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Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
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Address, ACPI_LODWORD (Value), Width);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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if (Reg->BitWidth == 64)
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{
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Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
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(Address + 4), ACPI_HIDWORD (Value), 32);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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}
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else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
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{
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Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
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Address, ACPI_LODWORD (Value), Width);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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if (Reg->BitWidth == 64)
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{
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Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
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(Address + 4), ACPI_HIDWORD (Value), 32);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n",
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ACPI_FORMAT_UINT64 (Value), Reg->BitWidth,
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ACPI_FORMAT_UINT64 (Address),
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AcpiUtGetRegionName (Reg->SpaceId)));
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return (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiWrite)
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/*******************************************************************************
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*
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* FUNCTION: AcpiReadBitRegister
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*
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* PARAMETERS: RegisterId - ID of ACPI Bit Register to access
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* ReturnValue - Value that was read from the register,
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* normalized to bit position zero.
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*
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* RETURN: Status and the value read from the specified Register. Value
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* returned is normalized to bit0 (is shifted all the way right)
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*
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* DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock.
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*
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* SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
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* PM2 Control.
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*
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* Note: The hardware lock is not required when reading the ACPI bit registers
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* since almost all of them are single bit and it does not matter that
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* the parent hardware register can be split across two physical
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* registers. The only multi-bit field is SLP_TYP in the PM1 control
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* register, but this field does not cross an 8-bit boundary (nor does
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* it make much sense to actually read this field.)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiReadBitRegister (
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UINT32 RegisterId,
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UINT32 *ReturnValue)
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{
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ACPI_BIT_REGISTER_INFO *BitRegInfo;
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UINT32 RegisterValue;
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UINT32 Value;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId);
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/* Get the info structure corresponding to the requested ACPI Register */
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BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
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if (!BitRegInfo)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Read the entire parent register */
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Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
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&RegisterValue);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Normalize the value that was read, mask off other bits */
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Value = ((RegisterValue & BitRegInfo->AccessBitMask)
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>> BitRegInfo->BitPosition);
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n",
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RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value));
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*ReturnValue = Value;
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiReadBitRegister)
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/*******************************************************************************
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*
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* FUNCTION: AcpiWriteBitRegister
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*
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* PARAMETERS: RegisterId - ID of ACPI Bit Register to access
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* Value - Value to write to the register, in bit
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* position zero. The bit is automaticallly
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* shifted to the correct position.
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*
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* RETURN: Status
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*
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* DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock
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* since most operations require a read/modify/write sequence.
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*
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* SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
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* PM2 Control.
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*
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* Note that at this level, the fact that there may be actually two
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* hardware registers (A and B - and B may not exist) is abstracted.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiWriteBitRegister (
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UINT32 RegisterId,
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UINT32 Value)
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{
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ACPI_BIT_REGISTER_INFO *BitRegInfo;
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ACPI_CPU_FLAGS LockFlags;
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UINT32 RegisterValue;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId);
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/* Get the info structure corresponding to the requested ACPI Register */
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BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
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if (!BitRegInfo)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
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/*
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* At this point, we know that the parent register is one of the
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* following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control
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*/
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if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS)
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{
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/*
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* 1) Case for PM1 Enable, PM1 Control, and PM2 Control
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*
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* Perform a register read to preserve the bits that we are not
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* interested in
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*/
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Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
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&RegisterValue);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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/*
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* Insert the input bit into the value that was just read
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* and write the register
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*/
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ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
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BitRegInfo->AccessBitMask, Value);
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Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister,
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RegisterValue);
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}
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else
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{
|
|
/*
|
|
* 2) Case for PM1 Status
|
|
*
|
|
* The Status register is different from the rest. Clear an event
|
|
* by writing 1, writing 0 has no effect. So, the only relevant
|
|
* information is the single bit we're interested in, all others
|
|
* should be written as 0 so they will be left unchanged.
|
|
*/
|
|
RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value,
|
|
BitRegInfo->BitPosition, BitRegInfo->AccessBitMask);
|
|
|
|
/* No need to write the register if value is all zeros */
|
|
|
|
if (RegisterValue)
|
|
{
|
|
Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS,
|
|
RegisterValue);
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
|
|
"BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n",
|
|
RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue));
|
|
|
|
|
|
UnlockAndExit:
|
|
|
|
AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiWriteBitRegister)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiGetSleepTypeData
|
|
*
|
|
* PARAMETERS: SleepState - Numeric sleep state
|
|
* *SleepTypeA - Where SLP_TYPa is returned
|
|
* *SleepTypeB - Where SLP_TYPb is returned
|
|
*
|
|
* RETURN: Status - ACPI status
|
|
*
|
|
* DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
|
|
* state.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiGetSleepTypeData (
|
|
UINT8 SleepState,
|
|
UINT8 *SleepTypeA,
|
|
UINT8 *SleepTypeB)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_EVALUATE_INFO *Info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData);
|
|
|
|
|
|
/* Validate parameters */
|
|
|
|
if ((SleepState > ACPI_S_STATES_MAX) ||
|
|
!SleepTypeA ||
|
|
!SleepTypeB)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Allocate the evaluation information block */
|
|
|
|
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
|
|
if (!Info)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
Info->Pathname = ACPI_CAST_PTR (char, AcpiGbl_SleepStateNames[SleepState]);
|
|
|
|
/* Evaluate the namespace object containing the values for this state */
|
|
|
|
Status = AcpiNsEvaluate (Info);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"%s while evaluating SleepState [%s]\n",
|
|
AcpiFormatException (Status), Info->Pathname));
|
|
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Must have a return object */
|
|
|
|
if (!Info->ReturnObject)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]",
|
|
Info->Pathname));
|
|
Status = AE_NOT_EXIST;
|
|
}
|
|
|
|
/* It must be of type Package */
|
|
|
|
else if (Info->ReturnObject->Common.Type != ACPI_TYPE_PACKAGE)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package"));
|
|
Status = AE_AML_OPERAND_TYPE;
|
|
}
|
|
|
|
/*
|
|
* The package must have at least two elements. NOTE (March 2005): This
|
|
* goes against the current ACPI spec which defines this object as a
|
|
* package with one encoded DWORD element. However, existing practice
|
|
* by BIOS vendors seems to be to have 2 or more elements, at least
|
|
* one per sleep type (A/B).
|
|
*/
|
|
else if (Info->ReturnObject->Package.Count < 2)
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Sleep State return package does not have at least two elements"));
|
|
Status = AE_AML_NO_OPERAND;
|
|
}
|
|
|
|
/* The first two elements must both be of type Integer */
|
|
|
|
else if (((Info->ReturnObject->Package.Elements[0])->Common.Type
|
|
!= ACPI_TYPE_INTEGER) ||
|
|
((Info->ReturnObject->Package.Elements[1])->Common.Type
|
|
!= ACPI_TYPE_INTEGER))
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Sleep State return package elements are not both Integers "
|
|
"(%s, %s)",
|
|
AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[0]),
|
|
AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[1])));
|
|
Status = AE_AML_OPERAND_TYPE;
|
|
}
|
|
else
|
|
{
|
|
/* Valid _Sx_ package size, type, and value */
|
|
|
|
*SleepTypeA = (UINT8)
|
|
(Info->ReturnObject->Package.Elements[0])->Integer.Value;
|
|
*SleepTypeB = (UINT8)
|
|
(Info->ReturnObject->Package.Elements[1])->Integer.Value;
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"While evaluating SleepState [%s], bad Sleep object %p type %s",
|
|
Info->Pathname, Info->ReturnObject,
|
|
AcpiUtGetObjectTypeName (Info->ReturnObject)));
|
|
}
|
|
|
|
AcpiUtRemoveReference (Info->ReturnObject);
|
|
|
|
Cleanup:
|
|
ACPI_FREE (Info);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData)
|