553 lines
17 KiB
C
553 lines
17 KiB
C
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/******************************************************************************
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*
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* Module Name: hwgpe - Low level GPE enable/disable/clear functions
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* $Revision: 42 $
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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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#include "acevents.h"
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwgpe")
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/******************************************************************************
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*
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* FUNCTION: AcpiHwGetGpeBitMask
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*
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* PARAMETERS: GpeNumber - The GPE
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*
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* RETURN: Gpe register bitmask for this gpe level
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*
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* DESCRIPTION: Get the bitmask for this GPE
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*
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******************************************************************************/
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UINT8
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AcpiHwGetGpeBitMask (
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UINT32 GpeNumber)
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{
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return (AcpiGbl_GpeNumberInfo [AcpiEvGetGpeNumberIndex (GpeNumber)].BitMask);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwEnableGpe
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*
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* PARAMETERS: GpeNumber - The GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Enable a single GPE.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwEnableGpe (
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UINT32 GpeNumber)
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{
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UINT32 InByte;
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UINT32 RegisterIndex;
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UINT8 BitMask;
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ACPI_STATUS Status;
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ACPI_FUNCTION_ENTRY ();
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/* Translate GPE number to index into global registers array. */
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RegisterIndex = AcpiEvGetGpeRegisterIndex (GpeNumber);
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/* Get the register bitmask for this GPE */
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BitMask = AcpiHwGetGpeBitMask (GpeNumber);
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/*
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* Read the current value of the register, set the appropriate bit
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* to enable the GPE, and write out the new register.
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*/
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Status = AcpiHwLowLevelRead (8, &InByte,
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&AcpiGbl_GpeRegisterInfo[RegisterIndex].EnableAddress, 0);
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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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Status = AcpiHwLowLevelWrite (8, (InByte | BitMask),
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&AcpiGbl_GpeRegisterInfo[RegisterIndex].EnableAddress, 0);
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return (Status);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwEnableGpeForWakeup
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*
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* PARAMETERS: GpeNumber - The GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Keep track of which GPEs the OS has requested not be
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* disabled when going to sleep.
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*
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******************************************************************************/
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void
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AcpiHwEnableGpeForWakeup (
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UINT32 GpeNumber)
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{
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UINT32 RegisterIndex;
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UINT8 BitMask;
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ACPI_FUNCTION_ENTRY ();
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/* Translate GPE number to index into global registers array. */
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RegisterIndex = AcpiEvGetGpeRegisterIndex (GpeNumber);
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/* Get the register bitmask for this GPE */
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BitMask = AcpiHwGetGpeBitMask (GpeNumber);
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/*
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* Set the bit so we will not disable this when sleeping
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*/
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AcpiGbl_GpeRegisterInfo[RegisterIndex].WakeEnable |= BitMask;
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwDisableGpe
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*
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* PARAMETERS: GpeNumber - The GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Disable a single GPE.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwDisableGpe (
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UINT32 GpeNumber)
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{
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UINT32 InByte;
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UINT32 RegisterIndex;
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UINT8 BitMask;
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ACPI_STATUS Status;
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ACPI_FUNCTION_ENTRY ();
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/* Translate GPE number to index into global registers array. */
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RegisterIndex = AcpiEvGetGpeRegisterIndex (GpeNumber);
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/* Get the register bitmask for this GPE */
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BitMask = AcpiHwGetGpeBitMask (GpeNumber);
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/*
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* Read the current value of the register, clear the appropriate bit,
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* and write out the new register value to disable the GPE.
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*/
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Status = AcpiHwLowLevelRead (8, &InByte,
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&AcpiGbl_GpeRegisterInfo[RegisterIndex].EnableAddress, 0);
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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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Status = AcpiHwLowLevelWrite (8, (InByte & ~BitMask),
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&AcpiGbl_GpeRegisterInfo[RegisterIndex].EnableAddress, 0);
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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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AcpiHwDisableGpeForWakeup(GpeNumber);
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwDisableGpeForWakeup
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*
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* PARAMETERS: GpeNumber - The GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Keep track of which GPEs the OS has requested not be
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* disabled when going to sleep.
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*
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******************************************************************************/
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void
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AcpiHwDisableGpeForWakeup (
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UINT32 GpeNumber)
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{
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UINT32 RegisterIndex;
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UINT8 BitMask;
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ACPI_FUNCTION_ENTRY ();
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/* Translate GPE number to index into global registers array. */
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RegisterIndex = AcpiEvGetGpeRegisterIndex (GpeNumber);
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/* Get the register bitmask for this GPE */
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BitMask = AcpiHwGetGpeBitMask (GpeNumber);
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/*
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* Clear the bit so we will disable this when sleeping
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*/
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AcpiGbl_GpeRegisterInfo[RegisterIndex].WakeEnable &= ~BitMask;
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwClearGpe
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*
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* PARAMETERS: GpeNumber - The GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Clear a single GPE.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwClearGpe (
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UINT32 GpeNumber)
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{
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UINT32 RegisterIndex;
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UINT8 BitMask;
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ACPI_STATUS Status;
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ACPI_FUNCTION_ENTRY ();
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/* Translate GPE number to index into global registers array. */
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RegisterIndex = AcpiEvGetGpeRegisterIndex (GpeNumber);
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/* Get the register bitmask for this GPE */
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BitMask = AcpiHwGetGpeBitMask (GpeNumber);
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/*
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* Write a one to the appropriate bit in the status register to
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* clear this GPE.
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*/
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Status = AcpiHwLowLevelWrite (8, BitMask,
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&AcpiGbl_GpeRegisterInfo[RegisterIndex].StatusAddress, 0);
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return (Status);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwGetGpeStatus
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*
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* PARAMETERS: GpeNumber - The GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Return the status of a single GPE.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwGetGpeStatus (
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UINT32 GpeNumber,
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ACPI_EVENT_STATUS *EventStatus)
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{
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UINT32 InByte = 0;
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UINT32 RegisterIndex = 0;
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UINT8 BitMask = 0;
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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ACPI_STATUS Status;
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ACPI_FUNCTION_ENTRY ();
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if (!EventStatus)
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{
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return (AE_BAD_PARAMETER);
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}
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(*EventStatus) = 0;
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/* Translate GPE number to index into global registers array. */
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RegisterIndex = AcpiEvGetGpeRegisterIndex (GpeNumber);
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GpeRegisterInfo = &AcpiGbl_GpeRegisterInfo[RegisterIndex];
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/* Get the register bitmask for this GPE */
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BitMask = AcpiHwGetGpeBitMask (GpeNumber);
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/* GPE Enabled? */
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Status = AcpiHwLowLevelRead (8, &InByte, &GpeRegisterInfo->EnableAddress, 0);
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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 (BitMask & InByte)
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{
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(*EventStatus) |= ACPI_EVENT_FLAG_ENABLED;
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}
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/* GPE Enabled for wake? */
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if (BitMask & GpeRegisterInfo->WakeEnable)
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{
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(*EventStatus) |= ACPI_EVENT_FLAG_WAKE_ENABLED;
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}
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/* GPE active (set)? */
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Status = AcpiHwLowLevelRead (8, &InByte, &GpeRegisterInfo->StatusAddress, 0);
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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 (BitMask & InByte)
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{
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(*EventStatus) |= ACPI_EVENT_FLAG_SET;
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwDisableNonWakeupGpes
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Disable all non-wakeup GPEs
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* Call with interrupts disabled. The interrupt handler also
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* modifies AcpiGbl_GpeRegisterInfo[i].Enable, so it should not be
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* given the chance to run until after non-wake GPEs are
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* re-enabled.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwDisableNonWakeupGpes (
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void)
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{
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UINT32 i;
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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UINT32 InValue;
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ACPI_STATUS Status;
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ACPI_FUNCTION_ENTRY ();
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for (i = 0; i < AcpiGbl_GpeRegisterCount; i++)
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{
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GpeRegisterInfo = &AcpiGbl_GpeRegisterInfo[i];
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/*
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* Read the enabled status of all GPEs. We
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* will be using it to restore all the GPEs later.
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*/
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Status = AcpiHwLowLevelRead (8, &InValue,
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&GpeRegisterInfo->EnableAddress, 0);
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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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GpeRegisterInfo->Enable = (UINT8) InValue;
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/*
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* Disable all GPEs except wakeup GPEs.
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*/
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Status = AcpiHwLowLevelWrite (8, GpeRegisterInfo->WakeEnable,
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&GpeRegisterInfo->EnableAddress, 0);
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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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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwEnableNonWakeupGpes
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Enable all non-wakeup GPEs we previously enabled.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwEnableNonWakeupGpes (
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void)
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{
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UINT32 i;
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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ACPI_STATUS Status;
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ACPI_FUNCTION_ENTRY ();
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for (i = 0; i < AcpiGbl_GpeRegisterCount; i++)
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{
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GpeRegisterInfo = &AcpiGbl_GpeRegisterInfo[i];
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/*
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* We previously stored the enabled status of all GPEs.
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* Blast them back in.
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*/
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Status = AcpiHwLowLevelWrite (8, GpeRegisterInfo->Enable,
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&GpeRegisterInfo->EnableAddress, 0);
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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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return (AE_OK);
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}
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