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Diffstat (limited to 'events/evxfgpe.c')
| -rw-r--r-- | events/evxfgpe.c | 962 |
1 files changed, 962 insertions, 0 deletions
diff --git a/events/evxfgpe.c b/events/evxfgpe.c new file mode 100644 index 000000000000..39f1e5dca595 --- /dev/null +++ b/events/evxfgpe.c @@ -0,0 +1,962 @@ +/****************************************************************************** + * + * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2010, 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 __EVXFGPE_C__ + +#include "acpi.h" +#include "accommon.h" +#include "acevents.h" +#include "acnamesp.h" + +#define _COMPONENT ACPI_EVENTS + ACPI_MODULE_NAME ("evxfgpe") + + +/******************************************************************************* + * + * 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 (AcpiUpdateGpes); + + + 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 = AE_BAD_PARAMETER; + ACPI_GPE_EVENT_INFO *GpeEventInfo; + ACPI_NAMESPACE_NODE *DeviceNode; + 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); + } + + /* Validate WakeDevice is of type Device */ + + DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice); + if (DeviceNode->Type != ACPI_TYPE_DEVICE) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); + + /* Ensure that we have a valid GPE number */ + + GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); + if (GpeEventInfo) + { + /* + * If there is no method or handler for this GPE, then the + * WakeDevice will be notified whenever this GPE fires (aka + * "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) + { + GpeEventInfo->Flags = + (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); + GpeEventInfo->Dispatch.DeviceNode = DeviceNode; + } + + GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE; + Status = AE_OK; + } + + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + 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, GpeRegisterInfo); + + /* 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 (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 (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) |