552 lines
14 KiB
C
552 lines
14 KiB
C
/******************************************************************************
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*
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* Module Name: hwgpe - Low level GPE enable/disable/clear functions
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.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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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/* Local prototypes */
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static ACPI_STATUS
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AcpiHwEnableWakeupGpeBlock (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Context);
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/******************************************************************************
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*
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* FUNCTION: AcpiHwGetGpeRegisterBit
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*
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* PARAMETERS: GpeEventInfo - Info block for the GPE
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*
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* RETURN: Register mask with a one in the GPE bit position
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*
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* DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
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* correct position for the input GPE.
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*
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******************************************************************************/
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UINT32
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AcpiHwGetGpeRegisterBit (
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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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return ((UINT32) 1 <<
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(GpeEventInfo->GpeNumber - GpeEventInfo->RegisterInfo->BaseGpeNumber));
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwLowSetGpe
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*
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* PARAMETERS: GpeEventInfo - Info block for the GPE to be disabled
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* Action - Enable or disable
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable or disable a single GPE in the parent enable register.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwLowSetGpe (
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ACPI_GPE_EVENT_INFO *GpeEventInfo,
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UINT32 Action)
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{
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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ACPI_STATUS Status;
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UINT32 EnableMask;
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UINT32 RegisterBit;
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ACPI_FUNCTION_ENTRY ();
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/* Get the info block for the entire GPE register */
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GpeRegisterInfo = GpeEventInfo->RegisterInfo;
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if (!GpeRegisterInfo)
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{
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return (AE_NOT_EXIST);
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}
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/* Get current value of the enable register that contains this GPE */
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Status = AcpiHwRead (&EnableMask, &GpeRegisterInfo->EnableAddress);
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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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/* Set or clear just the bit that corresponds to this GPE */
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RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
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switch (Action)
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{
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case ACPI_GPE_CONDITIONAL_ENABLE:
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/* Only enable if the EnableForRun bit is set */
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if (!(RegisterBit & GpeRegisterInfo->EnableForRun))
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{
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return (AE_BAD_PARAMETER);
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}
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/*lint -fallthrough */
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case ACPI_GPE_ENABLE:
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ACPI_SET_BIT (EnableMask, RegisterBit);
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break;
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case ACPI_GPE_DISABLE:
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ACPI_CLEAR_BIT (EnableMask, RegisterBit);
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Invalid GPE Action, %u", Action));
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return (AE_BAD_PARAMETER);
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}
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/* Write the updated enable mask */
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Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
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return (Status);
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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: GpeEventInfo - Info block for the GPE to be cleared
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear the status bit for 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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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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ACPI_STATUS Status;
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UINT32 RegisterBit;
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ACPI_FUNCTION_ENTRY ();
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/* Get the info block for the entire GPE register */
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GpeRegisterInfo = GpeEventInfo->RegisterInfo;
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if (!GpeRegisterInfo)
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{
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return (AE_NOT_EXIST);
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}
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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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RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
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Status = AcpiHwWrite (RegisterBit,
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&GpeRegisterInfo->StatusAddress);
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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: GpeEventInfo - Info block for the GPE to queried
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* EventStatus - Where the GPE status is returned
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*
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* RETURN: Status
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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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ACPI_GPE_EVENT_INFO *GpeEventInfo,
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ACPI_EVENT_STATUS *EventStatus)
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{
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UINT32 InByte;
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UINT32 RegisterBit;
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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ACPI_EVENT_STATUS LocalEventStatus = 0;
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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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/* GPE currently handled? */
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if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) !=
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ACPI_GPE_DISPATCH_NONE)
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{
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LocalEventStatus |= ACPI_EVENT_FLAG_HAS_HANDLER;
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}
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/* Get the info block for the entire GPE register */
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GpeRegisterInfo = GpeEventInfo->RegisterInfo;
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/* Get the register bitmask for this GPE */
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RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
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/* GPE currently enabled? (enabled for runtime?) */
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if (RegisterBit & GpeRegisterInfo->EnableForRun)
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{
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LocalEventStatus |= ACPI_EVENT_FLAG_ENABLED;
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}
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/* GPE enabled for wake? */
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if (RegisterBit & GpeRegisterInfo->EnableForWake)
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{
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LocalEventStatus |= ACPI_EVENT_FLAG_WAKE_ENABLED;
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}
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/* GPE currently active (status bit == 1)? */
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Status = AcpiHwRead (&InByte, &GpeRegisterInfo->StatusAddress);
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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 (RegisterBit & InByte)
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{
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LocalEventStatus |= ACPI_EVENT_FLAG_SET;
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}
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/* Set return value */
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(*EventStatus) = LocalEventStatus;
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwDisableGpeBlock
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*
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* PARAMETERS: GpeXruptInfo - GPE Interrupt info
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* GpeBlock - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable all GPEs within a single GPE block
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwDisableGpeBlock (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Context)
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{
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UINT32 i;
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ACPI_STATUS Status;
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/* Examine each GPE Register within the block */
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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/* Disable all GPEs in this register */
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Status = AcpiHwWrite (0x00, &GpeBlock->RegisterInfo[i].EnableAddress);
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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: AcpiHwClearGpeBlock
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*
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* PARAMETERS: GpeXruptInfo - GPE Interrupt info
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* GpeBlock - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear status bits for all GPEs within a single GPE block
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwClearGpeBlock (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Context)
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{
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UINT32 i;
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ACPI_STATUS Status;
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/* Examine each GPE Register within the block */
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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/* Clear status on all GPEs in this register */
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Status = AcpiHwWrite (0xFF, &GpeBlock->RegisterInfo[i].StatusAddress);
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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: AcpiHwEnableRuntimeGpeBlock
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*
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* PARAMETERS: GpeXruptInfo - GPE Interrupt info
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* GpeBlock - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
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* combination wake/run GPEs.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwEnableRuntimeGpeBlock (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Context)
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{
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UINT32 i;
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ACPI_STATUS Status;
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/* NOTE: assumes that all GPEs are currently disabled */
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/* Examine each GPE Register within the block */
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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if (!GpeBlock->RegisterInfo[i].EnableForRun)
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{
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continue;
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}
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/* Enable all "runtime" GPEs in this register */
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Status = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForRun,
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&GpeBlock->RegisterInfo[i].EnableAddress);
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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: AcpiHwEnableWakeupGpeBlock
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*
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* PARAMETERS: GpeXruptInfo - GPE Interrupt info
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* GpeBlock - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
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* combination wake/run GPEs.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiHwEnableWakeupGpeBlock (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Context)
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{
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UINT32 i;
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ACPI_STATUS Status;
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/* Examine each GPE Register within the block */
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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if (!GpeBlock->RegisterInfo[i].EnableForWake)
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{
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continue;
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}
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/* Enable all "wake" GPEs in this register */
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Status = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForWake,
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&GpeBlock->RegisterInfo[i].EnableAddress);
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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: AcpiHwDisableAllGpes
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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: Disable and clear all GPEs in all GPE blocks
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwDisableAllGpes (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (HwDisableAllGpes);
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Status = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL);
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Status = AcpiEvWalkGpeList (AcpiHwClearGpeBlock, NULL);
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return_ACPI_STATUS (Status);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwEnableAllRuntimeGpes
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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: Enable all "runtime" GPEs, in all GPE blocks
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwEnableAllRuntimeGpes (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (HwEnableAllRuntimeGpes);
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Status = AcpiEvWalkGpeList (AcpiHwEnableRuntimeGpeBlock, NULL);
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return_ACPI_STATUS (Status);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwEnableAllWakeupGpes
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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: Enable all "wakeup" GPEs, in all GPE blocks
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwEnableAllWakeupGpes (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (HwEnableAllWakeupGpes);
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Status = AcpiEvWalkGpeList (AcpiHwEnableWakeupGpeBlock, NULL);
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return_ACPI_STATUS (Status);
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}
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#endif /* !ACPI_REDUCED_HARDWARE */
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