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

 *

 * Module Name: evsci - System Control Interrupt configuration and

 *                      legacy to ACPI mode state transition functions

 *

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

/*

 * Copyright (C) 2000 - 2004, R. Byron Moore

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions, and the following disclaimer,

 *    without modification.

 * 2. Redistributions in binary form must reproduce at minimum a disclaimer

 *    substantially similar to the "NO WARRANTY" disclaimer below

 *    ("Disclaimer") and any redistribution must be conditioned upon

 *    including a substantially similar Disclaimer requirement for further

 *    binary redistribution.

 * 3. Neither the names of the above-listed copyright holders nor the names

 *    of any contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * NO WARRANTY

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGES.

 */

#include <acpi/acpi.h>

#include <acpi/acevents.h>

#define _COMPONENT          ACPI_EVENTS

         ACPI_MODULE_NAME    ("evsci")

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

 *

 * FUNCTION:    acpi_ev_sci_xrupt_handler

 *

 * PARAMETERS:  Context   - Calling Context

 *

 * RETURN:      Status code indicates whether interrupt was handled.

 *

 * DESCRIPTION: Interrupt handler that will figure out what function or

 *              control method to call to deal with a SCI.

 *

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

static u32 ACPI_SYSTEM_XFACE

acpi_ev_sci_xrupt_handler (

        void                            *context)

{

        struct acpi_gpe_xrupt_info      *gpe_xrupt_list = context;

        u32                             interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;

        ACPI_FUNCTION_TRACE("ev_sci_xrupt_handler");

        /*

         * We are guaranteed by the ACPI CA initialization/shutdown code that

         * if this interrupt handler is installed, ACPI is enabled.

         */

        /*

         * Fixed Events:

         * Check for and dispatch any Fixed Events that have occurred

         */

        interrupt_handled |= acpi_ev_fixed_event_detect ();

        /*

         * General Purpose Events:

         * Check for and dispatch any GPEs that have occurred

         */

        interrupt_handled |= acpi_ev_gpe_detect (gpe_xrupt_list);

        return_VALUE (interrupt_handled);

}

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

 *

 * FUNCTION:    acpi_ev_gpe_xrupt_handler

 *

 * PARAMETERS:  Context   - Calling Context

 *

 * RETURN:      Status code indicates whether interrupt was handled.

 *

 * DESCRIPTION: Handler for GPE Block Device interrupts

 *

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

u32 ACPI_SYSTEM_XFACE

acpi_ev_gpe_xrupt_handler (

        void                            *context)

{

        struct acpi_gpe_xrupt_info      *gpe_xrupt_list = context;

        u32                             interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;

        ACPI_FUNCTION_TRACE("ev_gpe_xrupt_handler");

        /*

         * We are guaranteed by the ACPI CA initialization/shutdown code that

         * if this interrupt handler is installed, ACPI is enabled.

         */

        /*

         * GPEs:

         * Check for and dispatch any GPEs that have occurred

         */

        interrupt_handled |= acpi_ev_gpe_detect (gpe_xrupt_list);

        return_VALUE (interrupt_handled);

}

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

 *

 * FUNCTION:    acpi_ev_install_sci_handler

 *

 * PARAMETERS:  none

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Installs SCI handler.

 *

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

u32

acpi_ev_install_sci_handler (void)

{

        u32                             status = AE_OK;

        ACPI_FUNCTION_TRACE ("ev_install_sci_handler");

        status = acpi_os_install_interrupt_handler ((u32) acpi_gbl_FADT->sci_int,

                           acpi_ev_sci_xrupt_handler, acpi_gbl_gpe_xrupt_list_head);

        return_ACPI_STATUS (status);

}

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

 *

 * FUNCTION:    acpi_ev_remove_sci_handler

 *

 * PARAMETERS:  none

 *

 * RETURN:      E_OK if handler uninstalled OK, E_ERROR if handler was not

 *              installed to begin with

 *

 * DESCRIPTION: Remove the SCI interrupt handler.  No further SCIs will be

 *              taken.

 *

 * Note:  It doesn't seem important to disable all events or set the event

 *        enable registers to their original values.  The OS should disable

 *        the SCI interrupt level when the handler is removed, so no more

 *        events will come in.

 *

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

acpi_status

acpi_ev_remove_sci_handler (void)

{

        acpi_status                     status;

        ACPI_FUNCTION_TRACE ("ev_remove_sci_handler");

        /* Just let the OS remove the handler and disable the level */

        status = acpi_os_remove_interrupt_handler ((u32) acpi_gbl_FADT->sci_int,

                           acpi_ev_sci_xrupt_handler);

        return_ACPI_STATUS (status);

}