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/*******************************************************************************
*
* Module Name : evsci - System Control Interrupt configuration and
* legacy to ACPI mode state transition functions
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Copyright ( C ) 2000 - 2005 , 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 " )
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/* Local prototypes */
static u32 ACPI_SYSTEM_XFACE
acpi_ev_sci_xrupt_handler (
void * context ) ;
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/*******************************************************************************
*
* 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
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acpi_ev_install_sci_handler (
void )
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{
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
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acpi_ev_remove_sci_handler (
void )
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{
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 ) ;
}
