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freebsd/sys/contrib/dev/acpica/evxfevnt.c
Jung-uk Kim 1a39cfb03c Vendor import of Intel ACPI-CA 20070320
2007-03-22 17:24:05 +00:00

925 lines
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/******************************************************************************
*
* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
* $Revision: 1.93 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2007, 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.
*
*****************************************************************************/
#define __EVXFEVNT_C__
#include <contrib/dev/acpica/acpi.h>
#include <contrib/dev/acpica/acevents.h>
#include <contrib/dev/acpica/acnamesp.h>
#include <contrib/dev/acpica/actables.h>
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evxfevnt")
/*******************************************************************************
*
* FUNCTION: AcpiEnable
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Transfers the system into ACPI mode.
*
******************************************************************************/
ACPI_STATUS
AcpiEnable (
void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiEnable);
/* ACPI tables must be present */
if (!AcpiTbTablesLoaded ())
{
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Check current mode */
if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
}
else
{
/* Transition to ACPI mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"Transition to ACPI mode successful\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiEnable)
/*******************************************************************************
*
* FUNCTION: AcpiDisable
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
*
******************************************************************************/
ACPI_STATUS
AcpiDisable (
void)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiDisable);
if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"System is already in legacy (non-ACPI) mode\n"));
}
else
{
/* Transition to LEGACY mode */
Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO,
"Could not exit ACPI mode to legacy mode"));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiDisable)
/*******************************************************************************
*
* FUNCTION: AcpiEnableEvent
*
* PARAMETERS: Event - The fixed eventto be enabled
* Flags - Reserved
*
* RETURN: Status
*
* DESCRIPTION: Enable an ACPI event (fixed)
*
******************************************************************************/
ACPI_STATUS
AcpiEnableEvent (
UINT32 Event,
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
UINT32 Value;
ACPI_FUNCTION_TRACE (AcpiEnableEvent);
/* Decode the Fixed Event */
if (Event > ACPI_EVENT_MAX)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Enable the requested fixed event (by writing a one to the
* enable register bit)
*/
Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 1);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Make sure that the hardware responded */
Status = AcpiGetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
&Value);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (Value != 1)
{
ACPI_ERROR ((AE_INFO,
"Could not enable %s event", AcpiUtGetEventName (Event)));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiEnableEvent)
/*******************************************************************************
*
* FUNCTION: AcpiSetGpeType
*
* PARAMETERS: GpeDevice - Parent GPE Device
* GpeNumber - GPE level within the GPE block
* Type - New GPE type
*
* RETURN: Status
*
* DESCRIPTION: Set the type of an individual GPE
*
******************************************************************************/
ACPI_STATUS
AcpiSetGpeType (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
UINT8 Type)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_FUNCTION_TRACE (AcpiSetGpeType);
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
if ((GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) == Type)
{
return_ACPI_STATUS (AE_OK);
}
/* Set the new type (will disable GPE if currently enabled) */
Status = AcpiEvSetGpeType (GpeEventInfo, Type);
UnlockAndExit:
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiSetGpeType)
/*******************************************************************************
*
* FUNCTION: AcpiEnableGpe
*
* PARAMETERS: GpeDevice - Parent GPE Device
* GpeNumber - GPE level within the GPE block
* Flags - Just enable, or also wake enable?
* Called from ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Enable an ACPI event (general purpose)
*
******************************************************************************/
ACPI_STATUS
AcpiEnableGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_FUNCTION_TRACE (AcpiEnableGpe);
/* Use semaphore lock if not executing at interrupt level */
if (Flags & ACPI_NOT_ISR)
{
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Perform the enable */
Status = AcpiEvEnableGpe (GpeEventInfo, TRUE);
UnlockAndExit:
if (Flags & ACPI_NOT_ISR)
{
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
/*******************************************************************************
*
* FUNCTION: AcpiDisableGpe
*
* PARAMETERS: GpeDevice - Parent GPE Device
* GpeNumber - GPE level within the GPE block
* Flags - Just disable, or also wake disable?
* Called from ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Disable an ACPI event (general purpose)
*
******************************************************************************/
ACPI_STATUS
AcpiDisableGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_FUNCTION_TRACE (AcpiDisableGpe);
/* Use semaphore lock if not executing at interrupt level */
if (Flags & ACPI_NOT_ISR)
{
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
Status = AcpiEvDisableGpe (GpeEventInfo);
UnlockAndExit:
if (Flags & ACPI_NOT_ISR)
{
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
/*******************************************************************************
*
* FUNCTION: AcpiDisableEvent
*
* PARAMETERS: Event - The fixed eventto be enabled
* Flags - Reserved
*
* RETURN: Status
*
* DESCRIPTION: Disable an ACPI event (fixed)
*
******************************************************************************/
ACPI_STATUS
AcpiDisableEvent (
UINT32 Event,
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
UINT32 Value;
ACPI_FUNCTION_TRACE (AcpiDisableEvent);
/* Decode the Fixed Event */
if (Event > ACPI_EVENT_MAX)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Disable the requested fixed event (by writing a zero to the
* enable register bit)
*/
Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 0);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiGetRegister (AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
&Value);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (Value != 0)
{
ACPI_ERROR ((AE_INFO,
"Could not disable %s events", AcpiUtGetEventName (Event)));
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiDisableEvent)
/*******************************************************************************
*
* FUNCTION: AcpiClearEvent
*
* PARAMETERS: Event - The fixed event to be cleared
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (fixed)
*
******************************************************************************/
ACPI_STATUS
AcpiClearEvent (
UINT32 Event)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiClearEvent);
/* Decode the Fixed Event */
if (Event > ACPI_EVENT_MAX)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Clear the requested fixed event (By writing a one to the
* status register bit)
*/
Status = AcpiSetRegister (AcpiGbl_FixedEventInfo[Event].StatusRegisterId, 1);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiClearEvent)
/*******************************************************************************
*
* FUNCTION: AcpiClearGpe
*
* PARAMETERS: GpeDevice - Parent GPE Device
* GpeNumber - GPE level within the GPE block
* Flags - Called from an ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (general purpose)
*
******************************************************************************/
ACPI_STATUS
AcpiClearGpe (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_FUNCTION_TRACE (AcpiClearGpe);
/* Use semaphore lock if not executing at interrupt level */
if (Flags & ACPI_NOT_ISR)
{
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* Ensure that we have a valid GPE number */
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
if (!GpeEventInfo)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
Status = AcpiHwClearGpe (GpeEventInfo);
UnlockAndExit:
if (Flags & ACPI_NOT_ISR)
{
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiClearGpe)
/*******************************************************************************
*
* FUNCTION: AcpiGetEventStatus
*
* PARAMETERS: Event - The fixed event
* EventStatus - Where the current status of the event will
* be returned
*
* RETURN: Status
*
* DESCRIPTION: Obtains and returns the current status of the event
*
******************************************************************************/
ACPI_STATUS
AcpiGetEventStatus (
UINT32 Event,
ACPI_EVENT_STATUS *EventStatus)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (AcpiGetEventStatus);
if (!EventStatus)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Decode the Fixed Event */
if (Event > ACPI_EVENT_MAX)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the status of the requested fixed event */
Status = AcpiGetRegister (AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
EventStatus);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiGetEventStatus)
/*******************************************************************************
*
* FUNCTION: AcpiGetGpeStatus
*
* PARAMETERS: GpeDevice - Parent GPE Device
* GpeNumber - GPE level within the GPE block
* Flags - Called from an ISR or not
* EventStatus - Where the current status of the event will
* be returned
*
* RETURN: Status
*
* DESCRIPTION: Get status of an event (general purpose)
*
******************************************************************************/
ACPI_STATUS
AcpiGetGpeStatus (
ACPI_HANDLE GpeDevice,
UINT32 GpeNumber,
UINT32 Flags,
ACPI_EVENT_STATUS *EventStatus)
{
ACPI_STATUS Status = AE_OK;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
/* Use semaphore lock if not executing at interrupt level */
if (Flags & ACPI_NOT_ISR)
{
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* 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:
if (Flags & ACPI_NOT_ISR)
{
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
/*******************************************************************************
*
* 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
*
******************************************************************************/
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 (Status);
}
Node = AcpiNsMapHandleToNode (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;
}
/* Run the _PRW methods and enable the GPEs */
Status = AcpiEvInitializeGpeBlock (Node, GpeBlock);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
/* Get the DeviceObject attached to the node */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
/* No object, create a new one */
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;
}
}
/* 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 (Status);
}
Node = AcpiNsMapHandleToNode (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)
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