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#include "acpi.h"

#include "accommon.h"

#define _COMPONENT          ACPI_EVENTS

        ACPI_MODULE_NAME    ("evxfevnt")

/* Local prototypes */

static ACPI_STATUS

AcpiEvGetGpeDevice (

/*******************************************************************************

 *

 * FUNCTION:    AcpiEnableGpe

 *

 * PARAMETERS:  GpeDevice       - Parent GPE Device. NULL for GPE0/GPE1

 *              GpeNumber       - GPE level within the GPE block

 *              GpeType         - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE

 *                                or both

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is

 *              hardware-enabled (for runtime GPEs), or the GPE register mask

 *              is updated (for wake GPEs).

 *

 ******************************************************************************/

ACPI_STATUS

AcpiEnableGpe (

    ACPI_HANDLE             GpeDevice,

    UINT32                  GpeNumber,

    UINT8                   GpeType)

{

    ACPI_STATUS             Status = AE_OK;

    ACPI_GPE_EVENT_INFO     *GpeEventInfo;

    ACPI_CPU_FLAGS          Flags;

    ACPI_FUNCTION_TRACE (AcpiEnableGpe);

    /* Parameter validation */

    if (!GpeType || (GpeType & ~ACPI_GPE_TYPE_WAKE_RUN))

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);

    /* Ensure that we have a valid GPE number */

    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);

    if (!GpeEventInfo)

    {

        Status = AE_BAD_PARAMETER;

        goto UnlockAndExit;

    }

    if (GpeType & ACPI_GPE_TYPE_RUNTIME)

    {

        if (GpeEventInfo->RuntimeCount == ACPI_UINT8_MAX)

        {

            Status = AE_LIMIT; /* Too many references */

            goto UnlockAndExit;

        }

        GpeEventInfo->RuntimeCount++;

        if (GpeEventInfo->RuntimeCount == 1)

        {

            Status = AcpiEvEnableGpe (GpeEventInfo);

            if (ACPI_FAILURE (Status))

            {

                GpeEventInfo->RuntimeCount--;

                goto UnlockAndExit;

            }

        }

    }

    if (GpeType & ACPI_GPE_TYPE_WAKE)

    {

        /* The GPE must have the ability to wake the system */

        if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))

        {

            Status = AE_TYPE;

            goto UnlockAndExit;

        }

        if (GpeEventInfo->WakeupCount == ACPI_UINT8_MAX)

        {

            Status = AE_LIMIT; /* Too many references */

            goto UnlockAndExit;

        }

        /*

         * Update the enable mask on the first wakeup reference. Wake GPEs

         * are only hardware-enabled just before sleeping.

         */

        GpeEventInfo->WakeupCount++;

        if (GpeEventInfo->WakeupCount == 1)

        {

            (void) AcpiEvUpdateGpeEnableMasks (GpeEventInfo);

        }

    }

UnlockAndExit:

    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

 *              GpeType         - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE

 *                                or both

 *

 * 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,

    UINT8                   GpeType)

{

    ACPI_STATUS             Status = AE_OK;

    ACPI_GPE_EVENT_INFO     *GpeEventInfo;

    ACPI_CPU_FLAGS          Flags;

    ACPI_FUNCTION_TRACE (AcpiDisableGpe);

    /* Parameter validation */

    if (!GpeType || (GpeType & ~ACPI_GPE_TYPE_WAKE_RUN))

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);

    /* Ensure that we have a valid GPE number */

    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);

    if (!GpeEventInfo)

    {

        Status = AE_BAD_PARAMETER;

        goto UnlockAndExit;

    }

    /* Hardware-disable a runtime GPE on removal of the last reference */

    if (GpeType & ACPI_GPE_TYPE_RUNTIME)

    {

        if (!GpeEventInfo->RuntimeCount)

        {

            Status = AE_LIMIT; /* There are no references to remove */

            goto UnlockAndExit;

        }

        GpeEventInfo->RuntimeCount--;

        if (!GpeEventInfo->RuntimeCount)

        {

            Status = AcpiEvDisableGpe (GpeEventInfo);

            if (ACPI_FAILURE (Status))

            {

                GpeEventInfo->RuntimeCount++;

                goto UnlockAndExit;

            }

        }

    }

    /*

     * Update masks for wake GPE on removal of the last reference.

     * No need to hardware-disable wake GPEs here, they are not currently

     * enabled.

     */

    if (GpeType & ACPI_GPE_TYPE_WAKE)

    {

        if (!GpeEventInfo->WakeupCount)

        {

            Status = AE_LIMIT; /* There are no references to remove */

            goto UnlockAndExit;

        }

        GpeEventInfo->WakeupCount--;

        if (!GpeEventInfo->WakeupCount)

        {

            (void) AcpiEvUpdateGpeEnableMasks (GpeEventInfo);

        }

    }

UnlockAndExit:

    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 = AcpiEvDisableGpe (GpeEventInfo);

        break;

    default:

        Status = AE_BAD_PARAMETER;

        break;

    }

UnlockAndExit:

    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);

    return_ACPI_STATUS (Status);

}

ACPI_EXPORT_SYMBOL (AcpiSetGpe)

/*******************************************************************************

 *

 * 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)

ACPI_EXPORT_SYMBOL (AcpiGetEventStatus)

/*******************************************************************************

 *

 * 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 status of an event (general purpose)

 *

 ******************************************************************************/

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:    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 = 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;

    /* Run the _PRW methods and enable the runtime GPEs in the new block */

    Status = AcpiEvInitializeGpeBlock (Node, 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)

/*******************************************************************************

 *

 * FUNCTION:    AcpiEvGetGpeDevice

 *

 * PARAMETERS:  GPE_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Matches the input GPE index (0-CurrentGpeCount) with a GPE

 *              block device. NULL if the GPE is one of the FADT-defined GPEs.

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiEvGetGpeDevice (

    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,

    ACPI_GPE_BLOCK_INFO     *GpeBlock,

    void                    *Context)

{

    ACPI_GPE_DEVICE_INFO    *Info = Context;

    /* Increment Index by the number of GPEs in this block */

    Info->NextBlockBaseIndex += GpeBlock->GpeCount;

    if (Info->Index < Info->NextBlockBaseIndex)

    {

        /*

         * The GPE index is within this block, get the node. Leave the node

         * NULL for the FADT-defined GPEs

         */

        if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE)

        {

            Info->GpeDevice = GpeBlock->Node;

        }

        Info->Status = AE_OK;

        return (AE_CTRL_END);

    }

    return (AE_OK);

}

/******************************************************************************

 *

 * 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);

}

/******************************************************************************

 *

 * 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);