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/*******************************************************************************
*
* Module Name: evsci - System Control Interrupt configuration and
* legacy to ACPI mode state transition functions
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2007, 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")
/* Local prototypes */
static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
/*******************************************************************************
*
* 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_UINT32(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_UINT32(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_interrupt,
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_interrupt,
acpi_ev_sci_xrupt_handler);
return_ACPI_STATUS(status);
}
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