/******************************************************************************* * * Module Name: evsci - System Control Interrupt configuration and * legacy to ACPI mode state transition functions * ******************************************************************************/ /* * Copyright (C) 2000 - 2008, Intel Corp. * 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 "accommon.h" #include "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); }