501 lines
16 KiB
C
501 lines
16 KiB
C
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/******************************************************************************
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*
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* Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
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* $Revision: 46 $
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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 - 2002, 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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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwsleep")
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/******************************************************************************
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*
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* FUNCTION: AcpiSetFirmwareWakingVector
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*
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* PARAMETERS: PhysicalAddress - Physical address of ACPI real mode
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* entry point.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Access function for dFirmwareWakingVector field in FACS
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiSetFirmwareWakingVector (
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ACPI_PHYSICAL_ADDRESS PhysicalAddress)
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{
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ACPI_FUNCTION_TRACE ("AcpiSetFirmwareWakingVector");
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/* Set the vector */
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if (AcpiGbl_CommonFACS.VectorWidth == 32)
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{
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*(ACPI_CAST_PTR (UINT32, AcpiGbl_CommonFACS.FirmwareWakingVector))
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= (UINT32) PhysicalAddress;
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}
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else
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{
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*AcpiGbl_CommonFACS.FirmwareWakingVector
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= PhysicalAddress;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiGetFirmwareWakingVector
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*
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* PARAMETERS: *PhysicalAddress - Output buffer where contents of
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* the FirmwareWakingVector field of
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* the FACS will be stored.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Access function for FirmwareWakingVector field in FACS
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetFirmwareWakingVector (
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ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
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{
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ACPI_FUNCTION_TRACE ("AcpiGetFirmwareWakingVector");
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if (!PhysicalAddress)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Get the vector */
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if (AcpiGbl_CommonFACS.VectorWidth == 32)
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{
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*PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
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*(ACPI_CAST_PTR (UINT32, AcpiGbl_CommonFACS.FirmwareWakingVector));
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}
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else
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{
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*PhysicalAddress =
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*AcpiGbl_CommonFACS.FirmwareWakingVector;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiEnterSleepStatePrep
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*
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* PARAMETERS: SleepState - Which sleep state to enter
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*
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* RETURN: Status
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*
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* DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
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* This function must execute with interrupts enabled.
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* We break sleeping into 2 stages so that OSPM can handle
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* various OS-specific tasks between the two steps.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEnterSleepStatePrep (
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UINT8 SleepState)
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{
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ACPI_STATUS Status;
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ACPI_OBJECT_LIST ArgList;
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ACPI_OBJECT Arg;
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ACPI_FUNCTION_TRACE ("AcpiEnterSleepStatePrep");
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/*
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* _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
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*/
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Status = AcpiGetSleepTypeData (SleepState,
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&AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
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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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/* Setup parameter object */
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ArgList.Count = 1;
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ArgList.Pointer = &Arg;
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Arg.Type = ACPI_TYPE_INTEGER;
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Arg.Integer.Value = SleepState;
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/* Run the _PTS and _GTS methods */
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Status = AcpiEvaluateObject (NULL, "\\_PTS", &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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return_ACPI_STATUS (Status);
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}
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Status = AcpiEvaluateObject (NULL, "\\_GTS", &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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return_ACPI_STATUS (Status);
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}
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return_ACPI_STATUS (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiEnterSleepState
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*
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* PARAMETERS: SleepState - Which sleep state to enter
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
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* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEnterSleepState (
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UINT8 SleepState)
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{
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UINT32 PM1AControl;
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UINT32 PM1BControl;
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ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo;
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ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo;
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UINT32 InValue;
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UINT32 Retry;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("AcpiEnterSleepState");
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if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) ||
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(AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX))
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{
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ACPI_REPORT_ERROR (("Sleep values out of range: A=%X B=%X\n",
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AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB));
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return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
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}
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SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE_A);
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SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
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/* Clear wake status */
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Status = AcpiSetRegister (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_LOCK);
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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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Status = AcpiHwClearAcpiStatus();
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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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/* Disable BM arbitration */
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Status = AcpiSetRegister (ACPI_BITREG_ARB_DISABLE, 1, ACPI_MTX_LOCK);
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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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Status = AcpiHwDisableNonWakeupGpes();
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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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/* Get current value of PM1A control */
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Status = AcpiHwRegisterRead (ACPI_MTX_LOCK, ACPI_REGISTER_PM1_CONTROL, &PM1AControl);
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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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ACPI_DEBUG_PRINT ((ACPI_DB_OK, "Entering S%d\n", SleepState));
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/* Clear SLP_EN and SLP_TYP fields */
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PM1AControl &= ~(SleepTypeRegInfo->AccessBitMask | SleepEnableRegInfo->AccessBitMask);
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PM1BControl = PM1AControl;
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/* Insert SLP_TYP bits */
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PM1AControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
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PM1BControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);
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/* Write #1: fill in SLP_TYP data */
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Status = AcpiHwRegisterWrite (ACPI_MTX_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1AControl);
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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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Status = AcpiHwRegisterWrite (ACPI_MTX_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1BControl);
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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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/* Insert SLP_ENABLE bit */
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PM1AControl |= SleepEnableRegInfo->AccessBitMask;
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PM1BControl |= SleepEnableRegInfo->AccessBitMask;
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/* Write #2: SLP_TYP + SLP_EN */
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ACPI_FLUSH_CPU_CACHE ();
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Status = AcpiHwRegisterWrite (ACPI_MTX_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1AControl);
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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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Status = AcpiHwRegisterWrite (ACPI_MTX_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1BControl);
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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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/*
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* Wait a second, then try again. This is to get S4/5 to work on all machines.
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*/
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if (SleepState > ACPI_STATE_S3)
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{
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/*
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* We wait so long to allow chipsets that poll this reg very slowly to
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* still read the right value. Ideally, this entire block would go
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* away entirely.
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*/
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AcpiOsStall (10000000);
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Status = AcpiHwRegisterWrite (ACPI_MTX_LOCK, ACPI_REGISTER_PM1_CONTROL,
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SleepEnableRegInfo->AccessBitMask);
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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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}
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/* Wait until we enter sleep state */
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Retry = 1000;
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do
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{
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Status = AcpiGetRegister (ACPI_BITREG_WAKE_STATUS, &InValue, ACPI_MTX_LOCK);
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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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/*
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* Some BIOSes don't set WAK_STS at all,
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* give up waiting for wakeup if we time out.
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*/
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if (Retry-- == 0) {
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break; /* giving up */
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}
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/* Spin until we wake */
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} while (!InValue);
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return_ACPI_STATUS (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiLeaveSleepState
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*
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* PARAMETERS: SleepState - Which sleep state we just exited
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiLeaveSleepState (
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UINT8 SleepState)
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{
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ACPI_OBJECT_LIST ArgList;
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ACPI_OBJECT Arg;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("AcpiLeaveSleepState");
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/* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
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AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
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/* Setup parameter object */
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ArgList.Count = 1;
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ArgList.Pointer = &Arg;
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Arg.Type = ACPI_TYPE_INTEGER;
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Arg.Integer.Value = SleepState;
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/* Ignore any errors from these methods */
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Status = AcpiEvaluateObject (NULL, "\\_BFS", &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_REPORT_ERROR (("Method _BFS failed, %s\n", AcpiFormatException (Status)));
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}
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Status = AcpiEvaluateObject (NULL, "\\_WAK", &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_REPORT_ERROR (("Method _WAK failed, %s\n", AcpiFormatException (Status)));
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}
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/* _WAK returns stuff - do we want to look at it? */
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Status = AcpiHwEnableNonWakeupGpes();
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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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/* Disable BM arbitration */
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Status = AcpiSetRegister (ACPI_BITREG_ARB_DISABLE, 0, ACPI_MTX_LOCK);
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return_ACPI_STATUS (Status);
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}
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