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

 *

 * Module Name: evevent - Fixed Event handling and dispatch

 *

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

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

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, 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.

 *

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

#include "acpi.h"

#include "accommon.h"

#include "acevents.h"

#define _COMPONENT          ACPI_EVENTS

        ACPI_MODULE_NAME    ("evevent")

/* Local prototypes */

static ACPI_STATUS

AcpiEvFixedEventInitialize (

    void);

static UINT32

AcpiEvFixedEventDispatch (

    UINT32                  Event);

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

 *

 * FUNCTION:    AcpiEvInitializeEvents

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)

 *

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

ACPI_STATUS

AcpiEvInitializeEvents (

    void)

{

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE (EvInitializeEvents);

    /*

     * Initialize the Fixed and General Purpose Events. This is done prior to

     * enabling SCIs to prevent interrupts from occurring before the handlers

     * are installed.

     */

    Status = AcpiEvFixedEventInitialize ();

    if (ACPI_FAILURE (Status))

    {

        ACPI_EXCEPTION ((AE_INFO, Status,

            "Unable to initialize fixed events"));

        return_ACPI_STATUS (Status);

    }

    Status = AcpiEvGpeInitialize ();

    if (ACPI_FAILURE (Status))

    {

        ACPI_EXCEPTION ((AE_INFO, Status,

            "Unable to initialize general purpose events"));

        return_ACPI_STATUS (Status);

    }

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiEvInstallXruptHandlers

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock

 *

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

ACPI_STATUS

AcpiEvInstallXruptHandlers (

    void)

{

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE (EvInstallXruptHandlers);

    /* Install the SCI handler */

    Status = AcpiEvInstallSciHandler ();

    if (ACPI_FAILURE (Status))

    {

        ACPI_EXCEPTION ((AE_INFO, Status,

            "Unable to install System Control Interrupt handler"));

        return_ACPI_STATUS (Status);

    }

    /* Install the handler for the Global Lock */

    Status = AcpiEvInitGlobalLockHandler ();

    if (ACPI_FAILURE (Status))

    {

        ACPI_EXCEPTION ((AE_INFO, Status,

            "Unable to initialize Global Lock handler"));

        return_ACPI_STATUS (Status);

    }

    AcpiGbl_EventsInitialized = TRUE;

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiEvFixedEventInitialize

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Install the fixed event handlers and disable all fixed events.

 *

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

static ACPI_STATUS

AcpiEvFixedEventInitialize (

    void)

{

    UINT32                  i;

    ACPI_STATUS             Status;

    /*

     * Initialize the structure that keeps track of fixed event handlers and

     * enable the fixed events.

     */

    for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)

    {

        AcpiGbl_FixedEventHandlers[i].Handler = NULL;

        AcpiGbl_FixedEventHandlers[i].Context = NULL;

        /* Disable the fixed event */

        if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF)

        {

            Status = AcpiWriteBitRegister (

                        AcpiGbl_FixedEventInfo[i].EnableRegisterId,

                        ACPI_DISABLE_EVENT);

            if (ACPI_FAILURE (Status))

            {

                return (Status);

            }

        }

    }

    return (AE_OK);

}

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

 *

 * FUNCTION:    AcpiEvFixedEventDetect

 *

 * PARAMETERS:  None

 *

 * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED

 *

 * DESCRIPTION: Checks the PM status register for active fixed events

 *

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

UINT32

AcpiEvFixedEventDetect (

    void)

{

    UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;

    UINT32                  FixedStatus;

    UINT32                  FixedEnable;

    UINT32                  i;

    ACPI_FUNCTION_NAME (EvFixedEventDetect);

    /*

     * Read the fixed feature status and enable registers, as all the cases

     * depend on their values. Ignore errors here.

     */

    (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);

    (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);

    ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,

        "Fixed Event Block: Enable %08X Status %08X\n",

        FixedEnable, FixedStatus));

    /*

     * Check for all possible Fixed Events and dispatch those that are active

     */

    for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)

    {

        /* Both the status and enable bits must be on for this event */

        if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) &&

            (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask))

        {

            /*

             * Found an active (signalled) event. Invoke global event

             * handler if present.

             */

            AcpiFixedEventCount[i]++;

            if (AcpiGbl_GlobalEventHandler)

            {

                AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_FIXED, NULL,

                     i, AcpiGbl_GlobalEventHandlerContext);

            }

            IntStatus |= AcpiEvFixedEventDispatch (i);

        }

    }

    return (IntStatus);

}

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

 *

 * FUNCTION:    AcpiEvFixedEventDispatch

 *

 * PARAMETERS:  Event               - Event type

 *

 * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED

 *

 * DESCRIPTION: Clears the status bit for the requested event, calls the

 *              handler that previously registered for the event.

 *

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

static UINT32

AcpiEvFixedEventDispatch (

    UINT32                  Event)

{

    ACPI_FUNCTION_ENTRY ();

    /* Clear the status bit */

    (void) AcpiWriteBitRegister (

            AcpiGbl_FixedEventInfo[Event].StatusRegisterId,

            ACPI_CLEAR_STATUS);

    /*

     * Make sure we've got a handler. If not, report an error. The event is

     * disabled to prevent further interrupts.

     */

    if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)

    {

        (void) AcpiWriteBitRegister (

                AcpiGbl_FixedEventInfo[Event].EnableRegisterId,

                ACPI_DISABLE_EVENT);

        ACPI_ERROR ((AE_INFO,

            "No installed handler for fixed event [0x%08X]",

            Event));

        return (ACPI_INTERRUPT_NOT_HANDLED);

    }

    /* Invoke the Fixed Event handler */

    return ((AcpiGbl_FixedEventHandlers[Event].Handler)(

                AcpiGbl_FixedEventHandlers[Event].Context));

}