/****************************************************************************** * * Module Name: hwgpe - Low level GPE enable/disable/clear functions * $Revision: 35 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * *****************************************************************************/ #include "acpi.h" #include "achware.h" #include "acnamesp.h" #include "acevents.h" #define _COMPONENT ACPI_HARDWARE MODULE_NAME ("hwgpe") /****************************************************************************** * * FUNCTION: AcpiHwEnableGpe * * PARAMETERS: GpeNumber - The GPE * * RETURN: None * * DESCRIPTION: Enable a single GPE. * ******************************************************************************/ void AcpiHwEnableGpe ( UINT32 GpeNumber) { UINT32 InByte; UINT32 RegisterIndex; UINT32 BitMask; FUNCTION_ENTRY (); /* * Translate GPE number to index into global registers array. */ RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; /* * Figure out the bit offset for this GPE within the target register. */ BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; /* * Read the current value of the register, set the appropriate bit * to enable the GPE, and write out the new register. */ InByte = 0; AcpiOsReadPort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, &InByte, 8); AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, (InByte | BitMask), 8); } /****************************************************************************** * * FUNCTION: AcpiHwEnableGpeForWakeup * * PARAMETERS: GpeNumber - The GPE * * RETURN: None * * DESCRIPTION: Keep track of which GPEs the OS has requested not be * disabled when going to sleep. * ******************************************************************************/ void AcpiHwEnableGpeForWakeup ( UINT32 GpeNumber) { UINT32 RegisterIndex; UINT32 BitMask; FUNCTION_ENTRY (); /* * Translate GPE number to index into global registers array. */ RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; /* * Figure out the bit offset for this GPE within the target register. */ BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; /* * Set the bit so we will not disable this when sleeping */ AcpiGbl_GpeRegisters[RegisterIndex].WakeEnable |= BitMask; } /****************************************************************************** * * FUNCTION: AcpiHwDisableGpe * * PARAMETERS: GpeNumber - The GPE * * RETURN: None * * DESCRIPTION: Disable a single GPE. * ******************************************************************************/ void AcpiHwDisableGpe ( UINT32 GpeNumber) { UINT32 InByte; UINT32 RegisterIndex; UINT32 BitMask; FUNCTION_ENTRY (); /* * Translate GPE number to index into global registers array. */ RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; /* * Figure out the bit offset for this GPE within the target register. */ BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; /* * Read the current value of the register, clear the appropriate bit, * and write out the new register value to disable the GPE. */ InByte = 0; AcpiOsReadPort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, &InByte, 8); AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, (InByte & ~BitMask), 8); AcpiHwDisableGpeForWakeup(GpeNumber); } /****************************************************************************** * * FUNCTION: AcpiHwDisableGpeForWakeup * * PARAMETERS: GpeNumber - The GPE * * RETURN: None * * DESCRIPTION: Keep track of which GPEs the OS has requested not be * disabled when going to sleep. * ******************************************************************************/ void AcpiHwDisableGpeForWakeup ( UINT32 GpeNumber) { UINT32 RegisterIndex; UINT32 BitMask; FUNCTION_ENTRY (); /* * Translate GPE number to index into global registers array. */ RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; /* * Figure out the bit offset for this GPE within the target register. */ BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; /* * Clear the bit so we will disable this when sleeping */ AcpiGbl_GpeRegisters[RegisterIndex].WakeEnable &= ~BitMask; } /****************************************************************************** * * FUNCTION: AcpiHwClearGpe * * PARAMETERS: GpeNumber - The GPE * * RETURN: None * * DESCRIPTION: Clear a single GPE. * ******************************************************************************/ void AcpiHwClearGpe ( UINT32 GpeNumber) { UINT32 RegisterIndex; UINT32 BitMask; FUNCTION_ENTRY (); /* * Translate GPE number to index into global registers array. */ RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; /* * Figure out the bit offset for this GPE within the target register. */ BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; /* * Write a one to the appropriate bit in the status register to * clear this GPE. */ AcpiOsWritePort (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, BitMask, 8); } /****************************************************************************** * * FUNCTION: AcpiHwGetGpeStatus * * PARAMETERS: GpeNumber - The GPE * * RETURN: None * * DESCRIPTION: Return the status of a single GPE. * ******************************************************************************/ void AcpiHwGetGpeStatus ( UINT32 GpeNumber, ACPI_EVENT_STATUS *EventStatus) { UINT32 InByte = 0; UINT32 RegisterIndex = 0; UINT32 BitMask = 0; FUNCTION_ENTRY (); if (!EventStatus) { return; } (*EventStatus) = 0; /* * Translate GPE number to index into global registers array. */ RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; /* * Figure out the bit offset for this GPE within the target register. */ BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; /* * Enabled?: */ InByte = 0; AcpiOsReadPort (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, &InByte, 8); if (BitMask & InByte) { (*EventStatus) |= ACPI_EVENT_FLAG_ENABLED; } /* * Enabled for wake?: */ if (BitMask & AcpiGbl_GpeRegisters[RegisterIndex].WakeEnable) { (*EventStatus) |= ACPI_EVENT_FLAG_WAKE_ENABLED; } /* * Set? */ InByte = 0; AcpiOsReadPort (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, &InByte, 8); if (BitMask & InByte) { (*EventStatus) |= ACPI_EVENT_FLAG_SET; } } /****************************************************************************** * * FUNCTION: AcpiHwDisableNonWakeupGpes * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Disable all non-wakeup GPEs * Call with interrupts disabled. The interrupt handler also * modifies AcpiGbl_GpeRegisters[i].Enable, so it should not be * given the chance to run until after non-wake GPEs are * re-enabled. * ******************************************************************************/ void AcpiHwDisableNonWakeupGpes ( void) { UINT32 i; FUNCTION_ENTRY (); for (i = 0; i < AcpiGbl_GpeRegisterCount; i++) { /* * Read the enabled status of all GPEs. We * will be using it to restore all the GPEs later. */ AcpiOsReadPort (AcpiGbl_GpeRegisters[i].EnableAddr, &AcpiGbl_GpeRegisters[i].Enable, 8); /* * Disable all GPEs but wakeup GPEs. */ AcpiOsWritePort(AcpiGbl_GpeRegisters[i].EnableAddr, AcpiGbl_GpeRegisters[i].WakeEnable, 8); } } /****************************************************************************** * * FUNCTION: AcpiHwEnableNonWakeupGpes * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Enable all non-wakeup GPEs we previously enabled. * ******************************************************************************/ void AcpiHwEnableNonWakeupGpes ( void) { UINT32 i; FUNCTION_ENTRY (); for (i = 0; i < AcpiGbl_GpeRegisterCount; i++) { /* * We previously stored the enabled status of all GPEs. * Blast them back in. */ AcpiOsWritePort(AcpiGbl_GpeRegisters[i].EnableAddr, AcpiGbl_GpeRegisters[i].Enable, 8); } }