735 lines
21 KiB
C
735 lines
21 KiB
C
/******************************************************************************
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*
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* Module Name: evgpe - General Purpose Event handling and dispatch
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acevents.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evgpe")
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/* Local prototypes */
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static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_set_gpe_type
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*
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* PARAMETERS: gpe_event_info - GPE to set
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* Type - New type
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*
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* RETURN: Status
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*
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* DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run)
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*
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******************************************************************************/
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acpi_status
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acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("ev_set_gpe_type");
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/* Validate type and update register enable masks */
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switch (type) {
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case ACPI_GPE_TYPE_WAKE:
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case ACPI_GPE_TYPE_RUNTIME:
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case ACPI_GPE_TYPE_WAKE_RUN:
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break;
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default:
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Disable the GPE if currently enabled */
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status = acpi_ev_disable_gpe(gpe_event_info);
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/* Type was validated above */
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gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */
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gpe_event_info->flags |= type; /* Insert type */
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_update_gpe_enable_masks
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*
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* PARAMETERS: gpe_event_info - GPE to update
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* Type - What to do: ACPI_GPE_DISABLE or
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* ACPI_GPE_ENABLE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Updates GPE register enable masks based on the GPE type
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*
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******************************************************************************/
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acpi_status
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acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info,
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u8 type)
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{
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struct acpi_gpe_register_info *gpe_register_info;
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u8 register_bit;
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ACPI_FUNCTION_TRACE("ev_update_gpe_enable_masks");
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gpe_register_info = gpe_event_info->register_info;
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if (!gpe_register_info) {
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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register_bit = gpe_event_info->register_bit;
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/* 1) Disable case. Simply clear all enable bits */
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if (type == ACPI_GPE_DISABLE) {
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ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
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register_bit);
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ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
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return_ACPI_STATUS(AE_OK);
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}
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/* 2) Enable case. Set/Clear the appropriate enable bits */
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switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
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case ACPI_GPE_TYPE_WAKE:
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ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
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ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
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break;
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case ACPI_GPE_TYPE_RUNTIME:
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ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
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register_bit);
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ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
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break;
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case ACPI_GPE_TYPE_WAKE_RUN:
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ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
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ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
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break;
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default:
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_enable_gpe
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*
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* PARAMETERS: gpe_event_info - GPE to enable
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* write_to_hardware - Enable now, or just mark data structs
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* (WAKE GPEs should be deferred)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable a GPE based on the GPE type
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*
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******************************************************************************/
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acpi_status
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acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info,
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u8 write_to_hardware)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("ev_enable_gpe");
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/* Make sure HW enable masks are updated */
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status =
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acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Mark wake-enabled or HW enable, or both */
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switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
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case ACPI_GPE_TYPE_WAKE:
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ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
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break;
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case ACPI_GPE_TYPE_WAKE_RUN:
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ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
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/*lint -fallthrough */
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case ACPI_GPE_TYPE_RUNTIME:
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ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
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if (write_to_hardware) {
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/* Clear the GPE (of stale events), then enable it */
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status = acpi_hw_clear_gpe(gpe_event_info);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Enable the requested runtime GPE */
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status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
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}
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break;
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default:
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_disable_gpe
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*
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* PARAMETERS: gpe_event_info - GPE to disable
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable a GPE based on the GPE type
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*
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******************************************************************************/
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acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE("ev_disable_gpe");
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if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) {
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return_ACPI_STATUS(AE_OK);
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}
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/* Make sure HW enable masks are updated */
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status =
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acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Mark wake-disabled or HW disable, or both */
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switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
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case ACPI_GPE_TYPE_WAKE:
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ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
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break;
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case ACPI_GPE_TYPE_WAKE_RUN:
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ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
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/*lint -fallthrough */
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case ACPI_GPE_TYPE_RUNTIME:
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/* Disable the requested runtime GPE */
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ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
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status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
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break;
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default:
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_get_gpe_event_info
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*
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* PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
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* gpe_number - Raw GPE number
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*
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* RETURN: A GPE event_info struct. NULL if not a valid GPE
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*
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* DESCRIPTION: Returns the event_info struct associated with this GPE.
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* Validates the gpe_block and the gpe_number
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*
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* Should be called only when the GPE lists are semaphore locked
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* and not subject to change.
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*
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******************************************************************************/
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struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
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u32 gpe_number)
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{
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union acpi_operand_object *obj_desc;
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struct acpi_gpe_block_info *gpe_block;
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acpi_native_uint i;
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ACPI_FUNCTION_ENTRY();
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/* A NULL gpe_block means use the FADT-defined GPE block(s) */
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if (!gpe_device) {
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/* Examine GPE Block 0 and 1 (These blocks are permanent) */
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for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
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gpe_block = acpi_gbl_gpe_fadt_blocks[i];
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if (gpe_block) {
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if ((gpe_number >= gpe_block->block_base_number)
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&& (gpe_number <
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gpe_block->block_base_number +
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(gpe_block->register_count * 8))) {
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return (&gpe_block->
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event_info[gpe_number -
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gpe_block->
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block_base_number]);
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}
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}
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}
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/* The gpe_number was not in the range of either FADT GPE block */
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return (NULL);
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}
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/* A Non-NULL gpe_device means this is a GPE Block Device */
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obj_desc =
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acpi_ns_get_attached_object((struct acpi_namespace_node *)
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gpe_device);
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if (!obj_desc || !obj_desc->device.gpe_block) {
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return (NULL);
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}
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gpe_block = obj_desc->device.gpe_block;
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if ((gpe_number >= gpe_block->block_base_number) &&
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(gpe_number <
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gpe_block->block_base_number + (gpe_block->register_count * 8))) {
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return (&gpe_block->
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event_info[gpe_number - gpe_block->block_base_number]);
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}
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return (NULL);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_gpe_detect
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*
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* PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt.
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* Can have multiple GPE blocks attached.
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Detect if any GP events have occurred. This function is
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* executed at interrupt level.
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*
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******************************************************************************/
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u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
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{
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u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
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u8 enabled_status_byte;
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struct acpi_gpe_register_info *gpe_register_info;
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u32 status_reg;
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u32 enable_reg;
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u32 flags;
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acpi_status status;
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struct acpi_gpe_block_info *gpe_block;
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acpi_native_uint i;
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acpi_native_uint j;
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ACPI_FUNCTION_NAME("ev_gpe_detect");
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/* Check for the case where there are no GPEs */
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if (!gpe_xrupt_list) {
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return (int_status);
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}
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/* Examine all GPE blocks attached to this interrupt level */
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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gpe_block = gpe_xrupt_list->gpe_block_list_head;
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while (gpe_block) {
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/*
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* Read all of the 8-bit GPE status and enable registers
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* in this GPE block, saving all of them.
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* Find all currently active GP events.
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*/
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for (i = 0; i < gpe_block->register_count; i++) {
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/* Get the next status/enable pair */
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gpe_register_info = &gpe_block->register_info[i];
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/* Read the Status Register */
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status =
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acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH,
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&status_reg,
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&gpe_register_info->
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status_address);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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/* Read the Enable Register */
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status =
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acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH,
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&enable_reg,
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&gpe_register_info->
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enable_address);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
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"Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n",
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gpe_register_info->base_gpe_number,
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status_reg, enable_reg));
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/* Check if there is anything active at all in this register */
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enabled_status_byte = (u8) (status_reg & enable_reg);
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if (!enabled_status_byte) {
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/* No active GPEs in this register, move on */
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continue;
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}
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/* Now look at the individual GPEs in this byte register */
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
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/* Examine one GPE bit */
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if (enabled_status_byte &
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acpi_gbl_decode_to8bit[j]) {
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/*
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* Found an active GPE. Dispatch the event to a handler
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* or method.
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*/
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int_status |=
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acpi_ev_gpe_dispatch(&gpe_block->
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event_info[(i *
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ACPI_GPE_REGISTER_WIDTH)
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+
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j],
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(u32) j +
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gpe_register_info->
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base_gpe_number);
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}
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}
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}
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gpe_block = gpe_block->next;
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}
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unlock_and_exit:
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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return (int_status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_asynch_execute_gpe_method
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*
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* PARAMETERS: Context (gpe_event_info) - Info for this GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Perform the actual execution of a GPE control method. This
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* function is called from an invocation of acpi_os_queue_for_execution
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* (and therefore does NOT execute at interrupt level) so that
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* the control method itself is not executed in the context of
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* an interrupt handler.
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*
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******************************************************************************/
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static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
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{
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struct acpi_gpe_event_info *gpe_event_info = (void *)context;
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u32 gpe_number = 0;
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acpi_status status;
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struct acpi_gpe_event_info local_gpe_event_info;
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struct acpi_parameter_info info;
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ACPI_FUNCTION_TRACE("ev_asynch_execute_gpe_method");
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status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
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if (ACPI_FAILURE(status)) {
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return_VOID;
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}
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/* Must revalidate the gpe_number/gpe_block */
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if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
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status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
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return_VOID;
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}
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/* Set the GPE flags for return to enabled state */
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(void)acpi_ev_enable_gpe(gpe_event_info, FALSE);
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/*
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* Take a snapshot of the GPE info for this level - we copy the
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* info to prevent a race condition with remove_handler/remove_block.
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*/
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ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info,
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|
sizeof(struct acpi_gpe_event_info));
|
|
|
|
status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_VOID;
|
|
}
|
|
|
|
/*
|
|
* Must check for control method type dispatch one more
|
|
* time to avoid race with ev_gpe_install_handler
|
|
*/
|
|
if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) ==
|
|
ACPI_GPE_DISPATCH_METHOD) {
|
|
/*
|
|
* Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx
|
|
* control method that corresponds to this GPE
|
|
*/
|
|
info.node = local_gpe_event_info.dispatch.method_node;
|
|
info.parameters =
|
|
ACPI_CAST_PTR(union acpi_operand_object *, gpe_event_info);
|
|
info.parameter_type = ACPI_PARAM_GPE;
|
|
|
|
status = acpi_ns_evaluate_by_handle(&info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_REPORT_ERROR(("%s while evaluating method [%4.4s] for GPE[%2X]\n", acpi_format_exception(status), acpi_ut_get_node_name(local_gpe_event_info.dispatch.method_node), gpe_number));
|
|
}
|
|
}
|
|
|
|
if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_LEVEL_TRIGGERED) {
|
|
/*
|
|
* GPE is level-triggered, we clear the GPE status bit after
|
|
* handling the event.
|
|
*/
|
|
status = acpi_hw_clear_gpe(&local_gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_VOID;
|
|
}
|
|
}
|
|
|
|
/* Enable this GPE */
|
|
|
|
(void)acpi_hw_write_gpe_enable_reg(&local_gpe_event_info);
|
|
return_VOID;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_gpe_dispatch
|
|
*
|
|
* PARAMETERS: gpe_event_info - Info for this GPE
|
|
* gpe_number - Number relative to the parent GPE block
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
|
|
* or method (e.g. _Lxx/_Exx) handler.
|
|
*
|
|
* This function executes at interrupt level.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u32
|
|
acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE("ev_gpe_dispatch");
|
|
|
|
/*
|
|
* If edge-triggered, clear the GPE status bit now. Note that
|
|
* level-triggered events are cleared after the GPE is serviced.
|
|
*/
|
|
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_EDGE_TRIGGERED) {
|
|
status = acpi_hw_clear_gpe(gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_REPORT_ERROR(("acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n", acpi_format_exception(status), gpe_number));
|
|
return_VALUE(ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
}
|
|
|
|
/* Save current system state */
|
|
|
|
if (acpi_gbl_system_awake_and_running) {
|
|
ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
|
|
} else {
|
|
ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
|
|
}
|
|
|
|
/*
|
|
* Dispatch the GPE to either an installed handler, or the control
|
|
* method associated with this GPE (_Lxx or _Exx).
|
|
* If a handler exists, we invoke it and do not attempt to run the method.
|
|
* If there is neither a handler nor a method, we disable the level to
|
|
* prevent further events from coming in here.
|
|
*/
|
|
switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
|
|
case ACPI_GPE_DISPATCH_HANDLER:
|
|
|
|
/*
|
|
* Invoke the installed handler (at interrupt level)
|
|
* Ignore return status for now. TBD: leave GPE disabled on error?
|
|
*/
|
|
(void)gpe_event_info->dispatch.handler->address(gpe_event_info->
|
|
dispatch.
|
|
handler->
|
|
context);
|
|
|
|
/* It is now safe to clear level-triggered events. */
|
|
|
|
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_LEVEL_TRIGGERED) {
|
|
status = acpi_hw_clear_gpe(gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_REPORT_ERROR(("acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n", acpi_format_exception(status), gpe_number));
|
|
return_VALUE(ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ACPI_GPE_DISPATCH_METHOD:
|
|
|
|
/*
|
|
* Disable GPE, so it doesn't keep firing before the method has a
|
|
* chance to run.
|
|
*/
|
|
status = acpi_ev_disable_gpe(gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_REPORT_ERROR(("acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n", acpi_format_exception(status), gpe_number));
|
|
return_VALUE(ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
|
|
/*
|
|
* Execute the method associated with the GPE
|
|
* NOTE: Level-triggered GPEs are cleared after the method completes.
|
|
*/
|
|
status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
|
|
acpi_ev_asynch_execute_gpe_method,
|
|
gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_REPORT_ERROR(("acpi_ev_gpe_dispatch: %s, Unable to queue handler for GPE[%2X] - event disabled\n", acpi_format_exception(status), gpe_number));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/* No handler or method to run! */
|
|
|
|
ACPI_REPORT_ERROR(("acpi_ev_gpe_dispatch: No handler or method for GPE[%2X], disabling event\n", gpe_number));
|
|
|
|
/*
|
|
* Disable the GPE. The GPE will remain disabled until the ACPI
|
|
* Core Subsystem is restarted, or a handler is installed.
|
|
*/
|
|
status = acpi_ev_disable_gpe(gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_REPORT_ERROR(("acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n", acpi_format_exception(status), gpe_number));
|
|
return_VALUE(ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return_VALUE(ACPI_INTERRUPT_HANDLED);
|
|
}
|
|
|
|
#ifdef ACPI_GPE_NOTIFY_CHECK
|
|
/*******************************************************************************
|
|
* TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED
|
|
*
|
|
* FUNCTION: acpi_ev_check_for_wake_only_gpe
|
|
*
|
|
* PARAMETERS: gpe_event_info - info for this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Determine if a a GPE is "wake-only".
|
|
*
|
|
* Called from Notify() code in interpreter when a "device_wake"
|
|
* Notify comes in.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_check_for_wake_only_gpe(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE("ev_check_for_wake_only_gpe");
|
|
|
|
if ((gpe_event_info) && /* Only >0 for _Lxx/_Exx */
|
|
((gpe_event_info->flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) { /* System state at GPE time */
|
|
/* This must be a wake-only GPE, disable it */
|
|
|
|
status = acpi_ev_disable_gpe(gpe_event_info);
|
|
|
|
/* Set GPE to wake-only. Do not change wake disabled/enabled status */
|
|
|
|
acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE);
|
|
|
|
ACPI_REPORT_INFO(("GPE %p was updated from wake/run to wake-only\n", gpe_event_info));
|
|
|
|
/* This was a wake-only GPE */
|
|
|
|
return_ACPI_STATUS(AE_WAKE_ONLY_GPE);
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
#endif
|