/******************************************************************************
*
* Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2013, 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.
*/
#define __EVXFGPE_C__
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evxfgpe")
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
/*******************************************************************************
*
* FUNCTION: AcpiUpdateAllGpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Complete GPE initialization and enable all GPEs that have
* associated _Lxx or _Exx methods and are not pointed to by any
* device _PRW methods (this indicates that these GPEs are
* generally intended for system or device wakeup. Such GPEs
* have to be enabled directly when the devices whose _PRW
* methods point to them are set up for wakeup signaling.)
*
* NOTE: Should be called after any GPEs are added to the system. Primarily,
* after the system _PRW methods have been run, but also after a GPE Block
* Device has been added or if any new GPE methods have been added via a
* dynamic table load.
*
******************************************************************************/
ACPI_STATUS
AcpiUpdateAllGpes (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiUpdateAllGpes);
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (AcpiGbl_AllGpesInitialized)
{
goto UnlockAndExit;
}
Status = AcpiEvWalkGpeList (AcpiEvInitializeGpeBlock, NULL);
if (ACPI_SUCCESS (Status))
{
AcpiGbl_AllGpesInitialized = TRUE;
}
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiUpdateAllGpes)
/*******************************************************************************
*
* FUNCTION: AcpiEnableGpe
*
* PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
* GpeNumber - GPE level within the GPE block
*
* RETURN: Status
*
* DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
* hardware-enabled.
*
******************************************************************************/
ACPI_STATUS
AcpiEnableGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber)
{
ACPI_STATUS Status = AE_BAD_PARAMETER;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (AcpiEnableGpe);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (GpeEventInfo)
{
Status = AcpiEvAddGpeReference (GpeEventInfo);
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
/*******************************************************************************
*
* FUNCTION: AcpiDisableGpe
*
* PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
* GpeNumber - GPE level within the GPE block
*
* RETURN: Status
*
* DESCRIPTION: Remove a reference to a GPE. When the last reference is
* removed, only then is the GPE disabled (for runtime GPEs), or
* the GPE mask bit disabled (for wake GPEs)
*
******************************************************************************/
ACPI_STATUS
AcpiDisableGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber)
{
ACPI_STATUS Status = AE_BAD_PARAMETER;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (AcpiDisableGpe);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (GpeEventInfo)
{
Status = AcpiEvRemoveGpeReference (GpeEventInfo);
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
/*******************************************************************************
*
* FUNCTION: AcpiSetGpe
*
* PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
* GpeNumber - GPE level within the GPE block
* Action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
*
* RETURN: Status
*
* DESCRIPTION: Enable or disable an individual GPE. This function bypasses
* the reference count mechanism used in the AcpiEnableGpe and
* AcpiDisableGpe interfaces -- and should be used with care.
*
* Note: Typically used to disable a runtime GPE for short period of time,
* then re-enable it, without disturbing the existing reference counts. This
* is useful, for example, in the Embedded Controller (EC) driver.
*
******************************************************************************/
ACPI_STATUS
AcpiSetGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
UINT8 Action)
{
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_STATUS Status;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (AcpiSetGpe);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Perform the action */
switch (Action)
{
case ACPI_GPE_ENABLE:
Status = AcpiEvEnableGpe (GpeEventInfo);
break;
case ACPI_GPE_DISABLE:
Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiSetGpe)
/*******************************************************************************
*
* FUNCTION: AcpiSetupGpeForWake
*
* PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW)
* GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
* GpeNumber - GPE level within the GPE block
*
* RETURN: Status
*
* DESCRIPTION: Mark a GPE as having the ability to wake the system. This
* interface is intended to be used as the host executes the
* _PRW methods (Power Resources for Wake) in the system tables.
* Each _PRW appears under a Device Object (The WakeDevice), and
* contains the info for the wake GPE associated with the
* WakeDevice.
*
******************************************************************************/
ACPI_STATUS
AcpiSetupGpeForWake (
ACPI_HANDLE WakeDevice,
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber)
{
ACPI_STATUS Status;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_NAMESPACE_NODE *DeviceNode;
ACPI_GPE_NOTIFY_INFO *Notify;
ACPI_GPE_NOTIFY_INFO *NewNotify;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake);
/* Parameter Validation */
if (!WakeDevice)
{
/*
* By forcing WakeDevice to be valid, we automatically enable the
* implicit notify feature on all hosts.
*/
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Handle root object case */
if (WakeDevice == ACPI_ROOT_OBJECT)
{
DeviceNode = AcpiGbl_RootNode;
}
else
{
DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice);
}
/* Validate WakeDevice is of type Device */
if (DeviceNode->Type != ACPI_TYPE_DEVICE)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Allocate a new notify object up front, in case it is needed.
* Memory allocation while holding a spinlock is a big no-no
* on some hosts.
*/
NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO));
if (!NewNotify)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/*
* If there is no method or handler for this GPE, then the
* WakeDevice will be notified whenever this GPE fires. This is
* known as an "implicit notify". Note: The GPE is assumed to be
* level-triggered (for windows compatibility).
*/
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_NONE)
{
/*
* This is the first device for implicit notify on this GPE.
* Just set the flags here, and enter the NOTIFY block below.
*/
GpeEventInfo->Flags =
(ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
}
/*
* If we already have an implicit notify on this GPE, add
* this device to the notify list.
*/
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_NOTIFY)
{
/* Ensure that the device is not already in the list */
Notify = GpeEventInfo->Dispatch.NotifyList;
while (Notify)
{
if (Notify->DeviceNode == DeviceNode)
{
Status = AE_ALREADY_EXISTS;
goto UnlockAndExit;
}
Notify = Notify->Next;
}
/* Add this device to the notify list for this GPE */
NewNotify->DeviceNode = DeviceNode;
NewNotify->Next = GpeEventInfo->Dispatch.NotifyList;
GpeEventInfo->Dispatch.NotifyList = NewNotify;
NewNotify = NULL;
}
/* Mark the GPE as a possible wake event */
GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
Status = AE_OK;
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
/* Delete the notify object if it was not used above */
if (NewNotify)
{
ACPI_FREE (NewNotify);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake)
/*******************************************************************************
*
* FUNCTION: AcpiSetGpeWakeMask
*
* PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
* GpeNumber - GPE level within the GPE block
* Action - Enable or Disable
*
* RETURN: Status
*
* DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
* already be marked as a WAKE GPE.
*
******************************************************************************/
ACPI_STATUS
AcpiSetGpeWakeMask (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
UINT8 Action)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_CPU_FLAGS Flags;
UINT32 RegisterBit;
ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/*
* Ensure that we have a valid GPE number and that this GPE is in
* fact a wake GPE
*/
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
{
Status = AE_TYPE;
goto UnlockAndExit;
}
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
if (!GpeRegisterInfo)
{
Status = AE_NOT_EXIST;
goto UnlockAndExit;
}
RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
/* Perform the action */
switch (Action)
{
case ACPI_GPE_ENABLE:
ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
break;
case ACPI_GPE_DISABLE:
ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
break;
default:
ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action));
Status = AE_BAD_PARAMETER;
break;
}
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask)
/*******************************************************************************
*
* FUNCTION: AcpiClearGpe
*
* PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
* GpeNumber - GPE level within the GPE block
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (general purpose)
*
******************************************************************************/
ACPI_STATUS
AcpiClearGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (AcpiClearGpe);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
Status = AcpiHwClearGpe (GpeEventInfo);
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiClearGpe)
/*******************************************************************************
*
* FUNCTION: AcpiGetGpeStatus
*
* PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
* GpeNumber - GPE level within the GPE block
* EventStatus - Where the current status of the event
* will be returned
*
* RETURN: Status
*
* DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
*
******************************************************************************/
ACPI_STATUS
AcpiGetGpeStatus (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
ACPI_EVENT_STATUS *EventStatus)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Obtain status on the requested GPE number */
Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
/*******************************************************************************
*
* FUNCTION: AcpiFinishGpe
*
* PARAMETERS: GpeDevice - Namespace node for the GPE Block
* (NULL for FADT defined GPEs)
* GpeNumber - GPE level within the GPE block
*
* RETURN: Status
*
* DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
* processing. Intended for use by asynchronous host-installed
* GPE handlers. The GPE is only reenabled if the EnableForRun bit
* is set in the GPE info.
*
******************************************************************************/
ACPI_STATUS
AcpiFinishGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber)
{
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_STATUS Status;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (AcpiFinishGpe);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
Status = AcpiEvFinishGpe (GpeEventInfo);
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiFinishGpe)
/******************************************************************************
*
* FUNCTION: AcpiDisableAllGpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Disable and clear all GPEs in all GPE blocks
*
******************************************************************************/
ACPI_STATUS
AcpiDisableAllGpes (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiDisableAllGpes);
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiHwDisableAllGpes ();
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes)
/******************************************************************************
*
* FUNCTION: AcpiEnableAllRuntimeGpes
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
*
******************************************************************************/
ACPI_STATUS
AcpiEnableAllRuntimeGpes (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes);
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiHwEnableAllRuntimeGpes ();
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes)
/*******************************************************************************
*
* FUNCTION: AcpiInstallGpeBlock
*
* PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
* GpeBlockAddress - Address and SpaceID
* RegisterCount - Number of GPE register pairs in the block
* InterruptNumber - H/W interrupt for the block
*
* RETURN: Status
*
* DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
* enabled here.
*
******************************************************************************/
ACPI_STATUS
AcpiInstallGpeBlock (
ACPI_HANDLE GpeDevice,
ACPI_GENERIC_ADDRESS *GpeBlockAddress,
UINT32 RegisterCount,
UINT32 InterruptNumber)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_NAMESPACE_NODE *Node;
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
if ((!GpeDevice) ||
(!GpeBlockAddress) ||
(!RegisterCount))
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Node = AcpiNsValidateHandle (GpeDevice);
if (!Node)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/*
* For user-installed GPE Block Devices, the GpeBlockBaseNumber
* is always zero
*/
Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress, RegisterCount,
0, InterruptNumber, &GpeBlock);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
/* Install block in the DeviceObject attached to the node */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
/*
* No object, create a new one (Device nodes do not always have
* an attached object)
*/
ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
if (!ObjDesc)
{
Status = AE_NO_MEMORY;
goto UnlockAndExit;
}
Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
/* Remove local reference to the object */
AcpiUtRemoveReference (ObjDesc);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
}
/* Now install the GPE block in the DeviceObject */
ObjDesc->Device.GpeBlock = GpeBlock;
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
/*******************************************************************************
*
* FUNCTION: AcpiRemoveGpeBlock
*
* PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
*
* RETURN: Status
*
* DESCRIPTION: Remove a previously installed block of GPE registers
*
******************************************************************************/
ACPI_STATUS
AcpiRemoveGpeBlock (
ACPI_HANDLE GpeDevice)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
if (!GpeDevice)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Node = AcpiNsValidateHandle (GpeDevice);
if (!Node)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Get the DeviceObject attached to the node */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc ||
!ObjDesc->Device.GpeBlock)
{
return_ACPI_STATUS (AE_NULL_OBJECT);
}
/* Delete the GPE block (but not the DeviceObject) */
Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
if (ACPI_SUCCESS (Status))
{
ObjDesc->Device.GpeBlock = NULL;
}
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
/*******************************************************************************
*
* FUNCTION: AcpiGetGpeDevice
*
* PARAMETERS: Index - System GPE index (0-CurrentGpeCount)
* GpeDevice - Where the parent GPE Device is returned
*
* RETURN: Status
*
* DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
* gpe device indicates that the gpe number is contained in one of
* the FADT-defined gpe blocks. Otherwise, the GPE block device.
*
******************************************************************************/
ACPI_STATUS
AcpiGetGpeDevice (
UINT32 Index,
ACPI_HANDLE *GpeDevice)
{
ACPI_GPE_DEVICE_INFO Info;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiGetGpeDevice);
if (!GpeDevice)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (Index >= AcpiCurrentGpeCount)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Setup and walk the GPE list */
Info.Index = Index;
Info.Status = AE_NOT_EXIST;
Info.GpeDevice = NULL;
Info.NextBlockBaseIndex = 0;
Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
*GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice);
return_ACPI_STATUS (Info.Status);
}
ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)
#endif /* !ACPI_REDUCED_HARDWARE */
