820 lines
24 KiB
C
820 lines
24 KiB
C
/******************************************************************************
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*
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* Module Name: evregion - Operation Region support
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, 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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#define __EVREGION_C__
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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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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evregion")
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extern UINT8 AcpiGbl_DefaultAddressSpaces[];
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/* Local prototypes */
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static void
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AcpiEvOrphanEcRegMethod (
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ACPI_NAMESPACE_NODE *EcDeviceNode);
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static ACPI_STATUS
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AcpiEvRegRun (
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ACPI_HANDLE ObjHandle,
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UINT32 Level,
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void *Context,
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void **ReturnValue);
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInitializeOpRegions
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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: Execute _REG methods for all Operation Regions that have
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* an installed default region handler.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInitializeOpRegions (
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void)
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{
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ACPI_STATUS Status;
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UINT32 i;
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ACPI_FUNCTION_TRACE (EvInitializeOpRegions);
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Run the _REG methods for OpRegions in each default address space */
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for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++)
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{
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/*
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* Make sure the installed handler is the DEFAULT handler. If not the
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* default, the _REG methods will have already been run (when the
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* handler was installed)
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*/
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if (AcpiEvHasDefaultHandler (AcpiGbl_RootNode,
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AcpiGbl_DefaultAddressSpaces[i]))
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{
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Status = AcpiEvExecuteRegMethods (AcpiGbl_RootNode,
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AcpiGbl_DefaultAddressSpaces[i]);
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}
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}
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AcpiGbl_RegMethodsExecuted = TRUE;
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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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: AcpiEvAddressSpaceDispatch
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*
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* PARAMETERS: RegionObj - Internal region object
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* FieldObj - Corresponding field. Can be NULL.
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* Function - Read or Write operation
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* RegionOffset - Where in the region to read or write
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* BitWidth - Field width in bits (8, 16, 32, or 64)
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* Value - Pointer to in or out value, must be
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* a full 64-bit integer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dispatch an address space or operation region access to
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* a previously installed handler.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvAddressSpaceDispatch (
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ACPI_OPERAND_OBJECT *RegionObj,
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ACPI_OPERAND_OBJECT *FieldObj,
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UINT32 Function,
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UINT32 RegionOffset,
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UINT32 BitWidth,
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UINT64 *Value)
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{
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ACPI_STATUS Status;
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ACPI_ADR_SPACE_HANDLER Handler;
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ACPI_ADR_SPACE_SETUP RegionSetup;
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ACPI_OPERAND_OBJECT *HandlerDesc;
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ACPI_OPERAND_OBJECT *RegionObj2;
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void *RegionContext = NULL;
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ACPI_CONNECTION_INFO *Context;
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ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);
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RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
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if (!RegionObj2)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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/* Ensure that there is a handler associated with this region */
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HandlerDesc = RegionObj->Region.Handler;
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if (!HandlerDesc)
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{
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ACPI_ERROR ((AE_INFO,
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"No handler for Region [%4.4s] (%p) [%s]",
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AcpiUtGetNodeName (RegionObj->Region.Node),
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RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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Context = HandlerDesc->AddressSpace.Context;
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/*
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* It may be the case that the region has never been initialized.
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* Some types of regions require special init code
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*/
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if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
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{
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/* This region has not been initialized yet, do it */
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RegionSetup = HandlerDesc->AddressSpace.Setup;
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if (!RegionSetup)
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{
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/* No initialization routine, exit with error */
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ACPI_ERROR ((AE_INFO,
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"No init routine for region(%p) [%s]",
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RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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/*
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* We must exit the interpreter because the region setup will
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* potentially execute control methods (for example, the _REG method
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* for this region)
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*/
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AcpiExExitInterpreter ();
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Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
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Context, &RegionContext);
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/* Re-enter the interpreter */
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AcpiExEnterInterpreter ();
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/* Check for failure of the Region Setup */
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"During region initialization: [%s]",
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AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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return_ACPI_STATUS (Status);
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}
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/* Region initialization may have been completed by RegionSetup */
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if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
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{
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RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
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if (RegionObj2->Extra.RegionContext)
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{
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/* The handler for this region was already installed */
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ACPI_FREE (RegionContext);
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}
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else
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{
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/*
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* Save the returned context for use in all accesses to
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* this particular region
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*/
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RegionObj2->Extra.RegionContext = RegionContext;
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}
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}
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}
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/* We have everything we need, we can invoke the address space handler */
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Handler = HandlerDesc->AddressSpace.Handler;
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
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&RegionObj->Region.Handler->AddressSpace, Handler,
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ACPI_FORMAT_NATIVE_UINT (RegionObj->Region.Address + RegionOffset),
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AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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/*
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* Special handling for GenericSerialBus and GeneralPurposeIo:
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* There are three extra parameters that must be passed to the
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* handler via the context:
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* 1) Connection buffer, a resource template from Connection() op.
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* 2) Length of the above buffer.
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* 3) Actual access length from the AccessAs() op.
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*/
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if (((RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS) ||
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(RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GPIO)) &&
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Context &&
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FieldObj)
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{
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/* Get the Connection (ResourceTemplate) buffer */
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Context->Connection = FieldObj->Field.ResourceBuffer;
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Context->Length = FieldObj->Field.ResourceLength;
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Context->AccessLength = FieldObj->Field.AccessLength;
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}
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if (!(HandlerDesc->AddressSpace.HandlerFlags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
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{
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/*
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* For handlers other than the default (supplied) handlers, we must
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* exit the interpreter because the handler *might* block -- we don't
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* know what it will do, so we can't hold the lock on the intepreter.
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*/
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AcpiExExitInterpreter();
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}
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/* Call the handler */
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Status = Handler (Function,
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(RegionObj->Region.Address + RegionOffset), BitWidth, Value,
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Context, RegionObj2->Extra.RegionContext);
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "Returned by Handler for [%s]",
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AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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}
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if (!(HandlerDesc->AddressSpace.HandlerFlags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
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{
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/*
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* We just returned from a non-default handler, we must re-enter the
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* interpreter
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*/
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AcpiExEnterInterpreter ();
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}
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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: AcpiEvDetachRegion
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*
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* PARAMETERS: RegionObj - Region Object
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* AcpiNsIsLocked - Namespace Region Already Locked?
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*
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* RETURN: None
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*
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* DESCRIPTION: Break the association between the handler and the region
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* this is a two way association.
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*
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******************************************************************************/
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void
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AcpiEvDetachRegion(
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ACPI_OPERAND_OBJECT *RegionObj,
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BOOLEAN AcpiNsIsLocked)
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{
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ACPI_OPERAND_OBJECT *HandlerObj;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT **LastObjPtr;
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ACPI_ADR_SPACE_SETUP RegionSetup;
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void **RegionContext;
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ACPI_OPERAND_OBJECT *RegionObj2;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvDetachRegion);
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RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
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if (!RegionObj2)
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{
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return_VOID;
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}
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RegionContext = &RegionObj2->Extra.RegionContext;
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/* Get the address handler from the region object */
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HandlerObj = RegionObj->Region.Handler;
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if (!HandlerObj)
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{
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/* This region has no handler, all done */
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return_VOID;
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}
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/* Find this region in the handler's list */
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ObjDesc = HandlerObj->AddressSpace.RegionList;
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LastObjPtr = &HandlerObj->AddressSpace.RegionList;
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while (ObjDesc)
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{
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/* Is this the correct Region? */
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if (ObjDesc == RegionObj)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Removing Region %p from address handler %p\n",
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RegionObj, HandlerObj));
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/* This is it, remove it from the handler's list */
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*LastObjPtr = ObjDesc->Region.Next;
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ObjDesc->Region.Next = NULL; /* Must clear field */
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if (AcpiNsIsLocked)
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{
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Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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}
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/* Now stop region accesses by executing the _REG method */
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Status = AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_DISCONNECT);
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "from region _REG, [%s]",
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AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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}
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if (AcpiNsIsLocked)
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{
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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}
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/*
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* If the region has been activated, call the setup handler with
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* the deactivate notification
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*/
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if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
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{
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RegionSetup = HandlerObj->AddressSpace.Setup;
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Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE,
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HandlerObj->AddressSpace.Context, RegionContext);
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/* Init routine may fail, Just ignore errors */
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"from region handler - deactivate, [%s]",
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AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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}
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RegionObj->Region.Flags &= ~(AOPOBJ_SETUP_COMPLETE);
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}
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/*
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* Remove handler reference in the region
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*
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* NOTE: this doesn't mean that the region goes away, the region
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* is just inaccessible as indicated to the _REG method
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*
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* If the region is on the handler's list, this must be the
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* region's handler
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*/
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RegionObj->Region.Handler = NULL;
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AcpiUtRemoveReference (HandlerObj);
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return_VOID;
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}
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/* Walk the linked list of handlers */
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LastObjPtr = &ObjDesc->Region.Next;
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ObjDesc = ObjDesc->Region.Next;
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}
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/* If we get here, the region was not in the handler's region list */
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Cannot remove region %p from address handler %p\n",
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RegionObj, HandlerObj));
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvAttachRegion
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*
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* PARAMETERS: HandlerObj - Handler Object
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* RegionObj - Region Object
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* AcpiNsIsLocked - Namespace Region Already Locked?
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*
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* RETURN: None
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*
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* DESCRIPTION: Create the association between the handler and the region
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* this is a two way association.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvAttachRegion (
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ACPI_OPERAND_OBJECT *HandlerObj,
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ACPI_OPERAND_OBJECT *RegionObj,
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BOOLEAN AcpiNsIsLocked)
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{
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ACPI_FUNCTION_TRACE (EvAttachRegion);
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Adding Region [%4.4s] %p to address handler %p [%s]\n",
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AcpiUtGetNodeName (RegionObj->Region.Node),
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RegionObj, HandlerObj,
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AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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/* Link this region to the front of the handler's list */
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RegionObj->Region.Next = HandlerObj->AddressSpace.RegionList;
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HandlerObj->AddressSpace.RegionList = RegionObj;
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/* Install the region's handler */
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if (RegionObj->Region.Handler)
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{
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return_ACPI_STATUS (AE_ALREADY_EXISTS);
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}
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RegionObj->Region.Handler = HandlerObj;
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AcpiUtAddReference (HandlerObj);
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvExecuteRegMethod
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*
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* PARAMETERS: RegionObj - Region object
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* Function - Passed to _REG: On (1) or Off (0)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute _REG method for a region
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvExecuteRegMethod (
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ACPI_OPERAND_OBJECT *RegionObj,
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UINT32 Function)
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{
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ACPI_EVALUATE_INFO *Info;
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ACPI_OPERAND_OBJECT *Args[3];
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ACPI_OPERAND_OBJECT *RegionObj2;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvExecuteRegMethod);
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RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
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if (!RegionObj2)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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if (RegionObj2->Extra.Method_REG == NULL)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/* Allocate and initialize the evaluation information block */
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Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
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if (!Info)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Info->PrefixNode = RegionObj2->Extra.Method_REG;
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Info->RelativePathname = NULL;
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Info->Parameters = Args;
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Info->Flags = ACPI_IGNORE_RETURN_VALUE;
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/*
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* The _REG method has two arguments:
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*
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* Arg0 - Integer:
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* Operation region space ID Same value as RegionObj->Region.SpaceId
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*
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* Arg1 - Integer:
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* connection status 1 for connecting the handler, 0 for disconnecting
|
|
* the handler (Passed as a parameter)
|
|
*/
|
|
Args[0] = AcpiUtCreateIntegerObject ((UINT64) RegionObj->Region.SpaceId);
|
|
if (!Args[0])
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto Cleanup1;
|
|
}
|
|
|
|
Args[1] = AcpiUtCreateIntegerObject ((UINT64) Function);
|
|
if (!Args[1])
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto Cleanup2;
|
|
}
|
|
|
|
Args[2] = NULL; /* Terminate list */
|
|
|
|
/* Execute the method, no return value */
|
|
|
|
ACPI_DEBUG_EXEC (
|
|
AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, Info->PrefixNode, NULL));
|
|
|
|
Status = AcpiNsEvaluate (Info);
|
|
AcpiUtRemoveReference (Args[1]);
|
|
|
|
Cleanup2:
|
|
AcpiUtRemoveReference (Args[0]);
|
|
|
|
Cleanup1:
|
|
ACPI_FREE (Info);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvExecuteRegMethods
|
|
*
|
|
* PARAMETERS: Node - Namespace node for the device
|
|
* SpaceId - The address space ID
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Run all _REG methods for the input Space ID;
|
|
* Note: assumes namespace is locked, or system init time.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvExecuteRegMethods (
|
|
ACPI_NAMESPACE_NODE *Node,
|
|
ACPI_ADR_SPACE_TYPE SpaceId)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvExecuteRegMethods);
|
|
|
|
|
|
/*
|
|
* Run all _REG methods for all Operation Regions for this space ID. This
|
|
* is a separate walk in order to handle any interdependencies between
|
|
* regions and _REG methods. (i.e. handlers must be installed for all
|
|
* regions of this Space ID before we can run any _REG methods)
|
|
*/
|
|
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX,
|
|
ACPI_NS_WALK_UNLOCK, AcpiEvRegRun, NULL,
|
|
&SpaceId, NULL);
|
|
|
|
/* Special case for EC: handle "orphan" _REG methods with no region */
|
|
|
|
if (SpaceId == ACPI_ADR_SPACE_EC)
|
|
{
|
|
AcpiEvOrphanEcRegMethod (Node);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvRegRun
|
|
*
|
|
* PARAMETERS: WalkNamespace callback
|
|
*
|
|
* DESCRIPTION: Run _REG method for region objects of the requested spaceID
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiEvRegRun (
|
|
ACPI_HANDLE ObjHandle,
|
|
UINT32 Level,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_ADR_SPACE_TYPE SpaceId;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
SpaceId = *ACPI_CAST_PTR (ACPI_ADR_SPACE_TYPE, Context);
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
Node = AcpiNsValidateHandle (ObjHandle);
|
|
if (!Node)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* We only care about regions.and objects that are allowed to have address
|
|
* space handlers
|
|
*/
|
|
if ((Node->Type != ACPI_TYPE_REGION) &&
|
|
(Node != AcpiGbl_RootNode))
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (!ObjDesc)
|
|
{
|
|
/* No object, just exit */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Object is a Region */
|
|
|
|
if (ObjDesc->Region.SpaceId != SpaceId)
|
|
{
|
|
/* This region is for a different address space, just ignore it */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
Status = AcpiEvExecuteRegMethod (ObjDesc, ACPI_REG_CONNECT);
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvOrphanEcRegMethod
|
|
*
|
|
* PARAMETERS: EcDeviceNode - Namespace node for an EC device
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Execute an "orphan" _REG method that appears under the EC
|
|
* device. This is a _REG method that has no corresponding region
|
|
* within the EC device scope. The orphan _REG method appears to
|
|
* have been enabled by the description of the ECDT in the ACPI
|
|
* specification: "The availability of the region space can be
|
|
* detected by providing a _REG method object underneath the
|
|
* Embedded Controller device."
|
|
*
|
|
* To quickly access the EC device, we use the EcDeviceNode used
|
|
* during EC handler installation. Otherwise, we would need to
|
|
* perform a time consuming namespace walk, executing _HID
|
|
* methods to find the EC device.
|
|
*
|
|
* MUTEX: Assumes the namespace is locked
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiEvOrphanEcRegMethod (
|
|
ACPI_NAMESPACE_NODE *EcDeviceNode)
|
|
{
|
|
ACPI_HANDLE RegMethod;
|
|
ACPI_NAMESPACE_NODE *NextNode;
|
|
ACPI_STATUS Status;
|
|
ACPI_OBJECT_LIST Args;
|
|
ACPI_OBJECT Objects[2];
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvOrphanEcRegMethod);
|
|
|
|
|
|
if (!EcDeviceNode)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Namespace is currently locked, must release */
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
/* Get a handle to a _REG method immediately under the EC device */
|
|
|
|
Status = AcpiGetHandle (EcDeviceNode, METHOD_NAME__REG, &RegMethod);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit; /* There is no _REG method present */
|
|
}
|
|
|
|
/*
|
|
* Execute the _REG method only if there is no Operation Region in
|
|
* this scope with the Embedded Controller space ID. Otherwise, it
|
|
* will already have been executed. Note, this allows for Regions
|
|
* with other space IDs to be present; but the code below will then
|
|
* execute the _REG method with the EmbeddedControl SpaceID argument.
|
|
*/
|
|
NextNode = AcpiNsGetNextNode (EcDeviceNode, NULL);
|
|
while (NextNode)
|
|
{
|
|
if ((NextNode->Type == ACPI_TYPE_REGION) &&
|
|
(NextNode->Object) &&
|
|
(NextNode->Object->Region.SpaceId == ACPI_ADR_SPACE_EC))
|
|
{
|
|
goto Exit; /* Do not execute the _REG */
|
|
}
|
|
|
|
NextNode = AcpiNsGetNextNode (EcDeviceNode, NextNode);
|
|
}
|
|
|
|
/* Evaluate the _REG(EmbeddedControl,Connect) method */
|
|
|
|
Args.Count = 2;
|
|
Args.Pointer = Objects;
|
|
Objects[0].Type = ACPI_TYPE_INTEGER;
|
|
Objects[0].Integer.Value = ACPI_ADR_SPACE_EC;
|
|
Objects[1].Type = ACPI_TYPE_INTEGER;
|
|
Objects[1].Integer.Value = ACPI_REG_CONNECT;
|
|
|
|
Status = AcpiEvaluateObject (RegMethod, NULL, &Args, NULL);
|
|
|
|
Exit:
|
|
/* We ignore all errors from above, don't care */
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
return_VOID;
|
|
}
|