/******************************************************************************
*
* Module Name: hwgpe - Low level GPE enable/disable/clear functions
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2018, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME ("hwgpe")
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
/* Local prototypes */
static ACPI_STATUS
AcpiHwEnableWakeupGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context);
static ACPI_STATUS
AcpiHwGpeEnableWrite (
UINT8 EnableMask,
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo);
/******************************************************************************
*
* FUNCTION: AcpiHwGetGpeRegisterBit
*
* PARAMETERS: GpeEventInfo - Info block for the GPE
*
* RETURN: Register mask with a one in the GPE bit position
*
* DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
* correct position for the input GPE.
*
******************************************************************************/
UINT32
AcpiHwGetGpeRegisterBit (
ACPI_GPE_EVENT_INFO *GpeEventInfo)
{
return ((UINT32) 1 <<
(GpeEventInfo->GpeNumber - GpeEventInfo->RegisterInfo->BaseGpeNumber));
}
/******************************************************************************
*
* FUNCTION: AcpiHwLowSetGpe
*
* PARAMETERS: GpeEventInfo - Info block for the GPE to be disabled
* Action - Enable or disable
*
* RETURN: Status
*
* DESCRIPTION: Enable or disable a single GPE in the parent enable register.
* The EnableMask field of the involved GPE register must be
* updated by the caller if necessary.
*
******************************************************************************/
ACPI_STATUS
AcpiHwLowSetGpe (
ACPI_GPE_EVENT_INFO *GpeEventInfo,
UINT32 Action)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_STATUS Status = AE_OK;
UINT64 EnableMask;
UINT32 RegisterBit;
ACPI_FUNCTION_ENTRY ();
/* Get the info block for the entire GPE register */
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
if (!GpeRegisterInfo)
{
return (AE_NOT_EXIST);
}
/* Get current value of the enable register that contains this GPE */
Status = AcpiHwRead (&EnableMask, &GpeRegisterInfo->EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Set or clear just the bit that corresponds to this GPE */
RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
switch (Action)
{
case ACPI_GPE_CONDITIONAL_ENABLE:
/* Only enable if the corresponding EnableMask bit is set */
if (!(RegisterBit & GpeRegisterInfo->EnableMask))
{
return (AE_BAD_PARAMETER);
}
/*lint -fallthrough */
case ACPI_GPE_ENABLE:
ACPI_SET_BIT (EnableMask, RegisterBit);
break;
case ACPI_GPE_DISABLE:
ACPI_CLEAR_BIT (EnableMask, RegisterBit);
break;
default:
ACPI_ERROR ((AE_INFO, "Invalid GPE Action, %u", Action));
return (AE_BAD_PARAMETER);
}
if (!(RegisterBit & GpeRegisterInfo->MaskForRun))
{
/* Write the updated enable mask */
Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
}
return (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiHwClearGpe
*
* PARAMETERS: GpeEventInfo - Info block for the GPE to be cleared
*
* RETURN: Status
*
* DESCRIPTION: Clear the status bit for a single GPE.
*
******************************************************************************/
ACPI_STATUS
AcpiHwClearGpe (
ACPI_GPE_EVENT_INFO *GpeEventInfo)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_STATUS Status;
UINT32 RegisterBit;
ACPI_FUNCTION_ENTRY ();
/* Get the info block for the entire GPE register */
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
if (!GpeRegisterInfo)
{
return (AE_NOT_EXIST);
}
/*
* Write a one to the appropriate bit in the status register to
* clear this GPE.
*/
RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
Status = AcpiHwWrite (RegisterBit, &GpeRegisterInfo->StatusAddress);
return (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiHwGetGpeStatus
*
* PARAMETERS: GpeEventInfo - Info block for the GPE to queried
* EventStatus - Where the GPE status is returned
*
* RETURN: Status
*
* DESCRIPTION: Return the status of a single GPE.
*
******************************************************************************/
ACPI_STATUS
AcpiHwGetGpeStatus (
ACPI_GPE_EVENT_INFO *GpeEventInfo,
ACPI_EVENT_STATUS *EventStatus)
{
UINT64 InByte;
UINT32 RegisterBit;
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_EVENT_STATUS LocalEventStatus = 0;
ACPI_STATUS Status;
ACPI_FUNCTION_ENTRY ();
if (!EventStatus)
{
return (AE_BAD_PARAMETER);
}
/* GPE currently handled? */
if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) !=
ACPI_GPE_DISPATCH_NONE)
{
LocalEventStatus |= ACPI_EVENT_FLAG_HAS_HANDLER;
}
/* Get the info block for the entire GPE register */
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
/* Get the register bitmask for this GPE */
RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
/* GPE currently enabled? (enabled for runtime?) */
if (RegisterBit & GpeRegisterInfo->EnableForRun)
{
LocalEventStatus |= ACPI_EVENT_FLAG_ENABLED;
}
/* GPE currently masked? (masked for runtime?) */
if (RegisterBit & GpeRegisterInfo->MaskForRun)
{
LocalEventStatus |= ACPI_EVENT_FLAG_MASKED;
}
/* GPE enabled for wake? */
if (RegisterBit & GpeRegisterInfo->EnableForWake)
{
LocalEventStatus |= ACPI_EVENT_FLAG_WAKE_ENABLED;
}
/* GPE currently enabled (enable bit == 1)? */
Status = AcpiHwRead (&InByte, &GpeRegisterInfo->EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (RegisterBit & InByte)
{
LocalEventStatus |= ACPI_EVENT_FLAG_ENABLE_SET;
}
/* GPE currently active (status bit == 1)? */
Status = AcpiHwRead (&InByte, &GpeRegisterInfo->StatusAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (RegisterBit & InByte)
{
LocalEventStatus |= ACPI_EVENT_FLAG_STATUS_SET;
}
/* Set return value */
(*EventStatus) = LocalEventStatus;
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiHwGpeEnableWrite
*
* PARAMETERS: EnableMask - Bit mask to write to the GPE register
* GpeRegisterInfo - Gpe Register info
*
* RETURN: Status
*
* DESCRIPTION: Write the enable mask byte to the given GPE register.
*
******************************************************************************/
static ACPI_STATUS
AcpiHwGpeEnableWrite (
UINT8 EnableMask,
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo)
{
ACPI_STATUS Status;
GpeRegisterInfo->EnableMask = EnableMask;
Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
return (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiHwDisableGpeBlock
*
* PARAMETERS: GpeXruptInfo - GPE Interrupt info
* GpeBlock - Gpe Block info
*
* RETURN: Status
*
* DESCRIPTION: Disable all GPEs within a single GPE block
*
******************************************************************************/
ACPI_STATUS
AcpiHwDisableGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
UINT32 i;
ACPI_STATUS Status;
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
/* Disable all GPEs in this register */
Status = AcpiHwGpeEnableWrite (0x00, &GpeBlock->RegisterInfo[i]);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiHwClearGpeBlock
*
* PARAMETERS: GpeXruptInfo - GPE Interrupt info
* GpeBlock - Gpe Block info
*
* RETURN: Status
*
* DESCRIPTION: Clear status bits for all GPEs within a single GPE block
*
******************************************************************************/
ACPI_STATUS
AcpiHwClearGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
UINT32 i;
ACPI_STATUS Status;
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
/* Clear status on all GPEs in this register */
Status = AcpiHwWrite (0xFF, &GpeBlock->RegisterInfo[i].StatusAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiHwEnableRuntimeGpeBlock
*
* PARAMETERS: GpeXruptInfo - GPE Interrupt info
* GpeBlock - Gpe Block info
*
* RETURN: Status
*
* DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
* combination wake/run GPEs.
*
******************************************************************************/
ACPI_STATUS
AcpiHwEnableRuntimeGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
UINT32 i;
ACPI_STATUS Status;
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
UINT8 EnableMask;
/* NOTE: assumes that all GPEs are currently disabled */
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
if (!GpeRegisterInfo->EnableForRun)
{
continue;
}
/* Enable all "runtime" GPEs in this register */
EnableMask = GpeRegisterInfo->EnableForRun &
~GpeRegisterInfo->MaskForRun;
Status = AcpiHwGpeEnableWrite (EnableMask, GpeRegisterInfo);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiHwEnableWakeupGpeBlock
*
* PARAMETERS: GpeXruptInfo - GPE Interrupt info
* GpeBlock - Gpe Block info
*
* RETURN: Status
*
* DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
* combination wake/run GPEs.
*
******************************************************************************/
static ACPI_STATUS
AcpiHwEnableWakeupGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
UINT32 i;
ACPI_STATUS Status;
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
/*
* Enable all "wake" GPEs in this register and disable the
* remaining ones.
*/
Status = AcpiHwGpeEnableWrite (GpeRegisterInfo->EnableForWake,
GpeRegisterInfo);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiHwDisableAllGpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Disable and clear all GPEs in all GPE blocks
*
******************************************************************************/
ACPI_STATUS
AcpiHwDisableAllGpes (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (HwDisableAllGpes);
Status = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL);
return_ACPI_STATUS (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiHwEnableAllRuntimeGpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
*
******************************************************************************/
ACPI_STATUS
AcpiHwEnableAllRuntimeGpes (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (HwEnableAllRuntimeGpes);
Status = AcpiEvWalkGpeList (AcpiHwEnableRuntimeGpeBlock, NULL);
return_ACPI_STATUS (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiHwEnableAllWakeupGpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
*
******************************************************************************/
ACPI_STATUS
AcpiHwEnableAllWakeupGpes (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (HwEnableAllWakeupGpes);
Status = AcpiEvWalkGpeList (AcpiHwEnableWakeupGpeBlock, NULL);
return_ACPI_STATUS (Status);
}
#endif /* !ACPI_REDUCED_HARDWARE */