forked from Minki/linux
719 lines
19 KiB
C
719 lines
19 KiB
C
/******************************************************************************
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*
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* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
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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 <linux/module.h>
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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("evxfevnt")
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/*******************************************************************************
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*
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* FUNCTION: acpi_enable
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Transfers the system into ACPI mode.
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*
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******************************************************************************/
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acpi_status acpi_enable(void)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE("acpi_enable");
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/* Make sure we have the FADT */
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if (!acpi_gbl_FADT) {
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ACPI_DEBUG_PRINT((ACPI_DB_WARN,
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"No FADT information present!\n"));
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return_ACPI_STATUS(AE_NO_ACPI_TABLES);
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}
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if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
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ACPI_DEBUG_PRINT((ACPI_DB_INIT,
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"System is already in ACPI mode\n"));
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} else {
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/* Transition to ACPI mode */
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status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI);
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if (ACPI_FAILURE(status)) {
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ACPI_REPORT_ERROR(("Could not transition to ACPI mode.\n"));
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INIT,
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"Transition to ACPI mode successful\n"));
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}
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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_disable
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
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*
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******************************************************************************/
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acpi_status acpi_disable(void)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE("acpi_disable");
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if (!acpi_gbl_FADT) {
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ACPI_DEBUG_PRINT((ACPI_DB_WARN,
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"No FADT information present!\n"));
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return_ACPI_STATUS(AE_NO_ACPI_TABLES);
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}
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if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
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ACPI_DEBUG_PRINT((ACPI_DB_INIT,
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"System is already in legacy (non-ACPI) mode\n"));
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} else {
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/* Transition to LEGACY mode */
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status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Could not exit ACPI mode to legacy mode"));
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n"));
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}
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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_enable_event
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*
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* PARAMETERS: Event - The fixed eventto be enabled
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* Flags - Reserved
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable an ACPI event (fixed)
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*
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******************************************************************************/
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acpi_status acpi_enable_event(u32 event, u32 flags)
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{
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acpi_status status = AE_OK;
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u32 value;
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ACPI_FUNCTION_TRACE("acpi_enable_event");
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/* Decode the Fixed Event */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/*
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* Enable the requested fixed event (by writing a one to the
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* enable register bit)
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*/
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status =
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acpi_set_register(acpi_gbl_fixed_event_info[event].
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enable_register_id, 1, ACPI_MTX_LOCK);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Make sure that the hardware responded */
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status =
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acpi_get_register(acpi_gbl_fixed_event_info[event].
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enable_register_id, &value, ACPI_MTX_LOCK);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (value != 1) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Could not enable %s event\n",
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acpi_ut_get_event_name(event)));
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return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
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}
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_enable_event);
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/*******************************************************************************
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*
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* FUNCTION: acpi_set_gpe_type
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*
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* PARAMETERS: gpe_device - Parent GPE Device
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* gpe_number - GPE level within the GPE block
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* Type - New GPE type
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*
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* RETURN: Status
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*
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* DESCRIPTION: Set the type of an individual GPE
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*
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******************************************************************************/
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acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type)
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{
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acpi_status status = AE_OK;
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struct acpi_gpe_event_info *gpe_event_info;
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ACPI_FUNCTION_TRACE("acpi_set_gpe_type");
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (!gpe_event_info) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
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return_ACPI_STATUS(AE_OK);
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}
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/* Set the new type (will disable GPE if currently enabled) */
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status = acpi_ev_set_gpe_type(gpe_event_info, type);
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unlock_and_exit:
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_set_gpe_type);
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/*******************************************************************************
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*
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* FUNCTION: acpi_enable_gpe
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*
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* PARAMETERS: gpe_device - Parent GPE Device
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* gpe_number - GPE level within the GPE block
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* Flags - Just enable, or also wake enable?
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* Called from ISR or not
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable an ACPI event (general purpose)
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*
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******************************************************************************/
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acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
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{
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acpi_status status = AE_OK;
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struct acpi_gpe_event_info *gpe_event_info;
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ACPI_FUNCTION_TRACE("acpi_enable_gpe");
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/* Use semaphore lock if not executing at interrupt level */
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if (flags & ACPI_NOT_ISR) {
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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_ACPI_STATUS(status);
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}
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}
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (!gpe_event_info) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Perform the enable */
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status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
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unlock_and_exit:
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if (flags & ACPI_NOT_ISR) {
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(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
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}
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_enable_gpe);
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/*******************************************************************************
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*
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* FUNCTION: acpi_disable_gpe
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*
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* PARAMETERS: gpe_device - Parent GPE Device
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* gpe_number - GPE level within the GPE block
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* Flags - Just disable, or also wake disable?
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* Called from ISR or not
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable an ACPI event (general purpose)
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*
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******************************************************************************/
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acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
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{
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acpi_status status = AE_OK;
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struct acpi_gpe_event_info *gpe_event_info;
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ACPI_FUNCTION_TRACE("acpi_disable_gpe");
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/* Use semaphore lock if not executing at interrupt level */
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if (flags & ACPI_NOT_ISR) {
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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_ACPI_STATUS(status);
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}
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}
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (!gpe_event_info) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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status = acpi_ev_disable_gpe(gpe_event_info);
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unlock_and_exit:
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if (flags & ACPI_NOT_ISR) {
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(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
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}
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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_disable_event
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*
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* PARAMETERS: Event - The fixed eventto be enabled
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* Flags - Reserved
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable an ACPI event (fixed)
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*
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******************************************************************************/
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acpi_status acpi_disable_event(u32 event, u32 flags)
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{
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acpi_status status = AE_OK;
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u32 value;
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ACPI_FUNCTION_TRACE("acpi_disable_event");
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/* Decode the Fixed Event */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/*
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* Disable the requested fixed event (by writing a zero to the
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* enable register bit)
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*/
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status =
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acpi_set_register(acpi_gbl_fixed_event_info[event].
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enable_register_id, 0, ACPI_MTX_LOCK);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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status =
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acpi_get_register(acpi_gbl_fixed_event_info[event].
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enable_register_id, &value, ACPI_MTX_LOCK);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (value != 0) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Could not disable %s events\n",
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acpi_ut_get_event_name(event)));
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return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
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}
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_disable_event);
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/*******************************************************************************
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*
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* FUNCTION: acpi_clear_event
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*
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* PARAMETERS: Event - The fixed event to be cleared
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear an ACPI event (fixed)
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*
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******************************************************************************/
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acpi_status acpi_clear_event(u32 event)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE("acpi_clear_event");
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/* Decode the Fixed Event */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/*
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* Clear the requested fixed event (By writing a one to the
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* status register bit)
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*/
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status =
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acpi_set_register(acpi_gbl_fixed_event_info[event].
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status_register_id, 1, ACPI_MTX_LOCK);
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return_ACPI_STATUS(status);
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}
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EXPORT_SYMBOL(acpi_clear_event);
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/*******************************************************************************
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*
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* FUNCTION: acpi_clear_gpe
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*
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* PARAMETERS: gpe_device - Parent GPE Device
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* gpe_number - GPE level within the GPE block
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* Flags - Called from an ISR or not
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear an ACPI event (general purpose)
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*
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******************************************************************************/
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acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
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{
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acpi_status status = AE_OK;
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struct acpi_gpe_event_info *gpe_event_info;
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ACPI_FUNCTION_TRACE("acpi_clear_gpe");
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/* Use semaphore lock if not executing at interrupt level */
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if (flags & ACPI_NOT_ISR) {
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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_ACPI_STATUS(status);
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}
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}
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (!gpe_event_info) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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status = acpi_hw_clear_gpe(gpe_event_info);
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unlock_and_exit:
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if (flags & ACPI_NOT_ISR) {
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(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
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}
|
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return_ACPI_STATUS(status);
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}
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|
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#ifdef ACPI_FUTURE_USAGE
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/*******************************************************************************
|
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*
|
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* FUNCTION: acpi_get_event_status
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*
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* PARAMETERS: Event - The fixed event
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* event_status - Where the current status of the event will
|
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* be returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Obtains and returns the current status of the event
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*
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******************************************************************************/
|
|
|
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acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
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{
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acpi_status status = AE_OK;
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|
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ACPI_FUNCTION_TRACE("acpi_get_event_status");
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|
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if (!event_status) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Decode the Fixed Event */
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|
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Get the status of the requested fixed event */
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status =
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acpi_get_register(acpi_gbl_fixed_event_info[event].
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status_register_id, event_status, ACPI_MTX_LOCK);
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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_get_gpe_status
|
|
*
|
|
* PARAMETERS: gpe_device - Parent GPE Device
|
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* gpe_number - GPE level within the GPE block
|
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* Flags - Called from an ISR or not
|
|
* event_status - Where the current status of the event will
|
|
* be returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get status of an event (general purpose)
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_get_gpe_status(acpi_handle gpe_device,
|
|
u32 gpe_number, u32 flags, acpi_event_status * event_status)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_get_gpe_status");
|
|
|
|
/* Use semaphore lock if not executing at interrupt level */
|
|
|
|
if (flags & ACPI_NOT_ISR) {
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
|
|
if (!gpe_event_info) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Obtain status on the requested GPE number */
|
|
|
|
status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
|
|
|
|
unlock_and_exit:
|
|
if (flags & ACPI_NOT_ISR) {
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
#endif /* ACPI_FUTURE_USAGE */
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
|
|
* gpe_block_address - Address and space_iD
|
|
* register_count - Number of GPE register pairs in the block
|
|
* interrupt_number - H/W interrupt for the block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Create and Install a block of GPE registers
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_install_gpe_block(acpi_handle gpe_device,
|
|
struct acpi_generic_address *gpe_block_address,
|
|
u32 register_count, u32 interrupt_number)
|
|
{
|
|
acpi_status status;
|
|
union acpi_operand_object *obj_desc;
|
|
struct acpi_namespace_node *node;
|
|
struct acpi_gpe_block_info *gpe_block;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_install_gpe_block");
|
|
|
|
if ((!gpe_device) || (!gpe_block_address) || (!register_count)) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
node = acpi_ns_map_handle_to_node(gpe_device);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/*
|
|
* For user-installed GPE Block Devices, the gpe_block_base_number
|
|
* is always zero
|
|
*/
|
|
status =
|
|
acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0,
|
|
interrupt_number, &gpe_block);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Get the device_object attached to the node */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc) {
|
|
/* No object, create a new one */
|
|
|
|
obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
|
|
if (!obj_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
status =
|
|
acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE);
|
|
|
|
/* Remove local reference to the object */
|
|
|
|
acpi_ut_remove_reference(obj_desc);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
}
|
|
|
|
/* Install the GPE block in the device_object */
|
|
|
|
obj_desc->device.gpe_block = gpe_block;
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_install_gpe_block);
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a previously installed block of GPE registers
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_remove_gpe_block(acpi_handle gpe_device)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
acpi_status status;
|
|
struct acpi_namespace_node *node;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_remove_gpe_block");
|
|
|
|
if (!gpe_device) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
node = acpi_ns_map_handle_to_node(gpe_device);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Get the device_object attached to the node */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc || !obj_desc->device.gpe_block) {
|
|
return_ACPI_STATUS(AE_NULL_OBJECT);
|
|
}
|
|
|
|
/* Delete the GPE block (but not the device_object) */
|
|
|
|
status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block);
|
|
if (ACPI_SUCCESS(status)) {
|
|
obj_desc->device.gpe_block = NULL;
|
|
}
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_remove_gpe_block);
|