| /******************************************************************************* |
| * |
| * 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") |
| |
| /* 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_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); |
| } |