396 lines
9.9 KiB
C
396 lines
9.9 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 - 2013, Intel Corp.
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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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#define __EVXFEVNT_C__
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <contrib/dev/acpica/include/actables.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxfevnt")
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/*******************************************************************************
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*
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* FUNCTION: AcpiEnable
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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
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AcpiEnable (
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void)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (AcpiEnable);
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/* ACPI tables must be present */
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if (!AcpiTbTablesLoaded ())
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{
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return_ACPI_STATUS (AE_NO_ACPI_TABLES);
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}
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/* If the Hardware Reduced flag is set, machine is always in acpi mode */
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if (AcpiGbl_ReducedHardware)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/* Check current mode */
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if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
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}
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else
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{
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/* Transition to ACPI mode */
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Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
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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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ACPI_EXPORT_SYMBOL (AcpiEnable)
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/*******************************************************************************
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*
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* FUNCTION: AcpiDisable
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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
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AcpiDisable (
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void)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (AcpiDisable);
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/* If the Hardware Reduced flag is set, machine is always in acpi mode */
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if (AcpiGbl_ReducedHardware)
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{
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return_ACPI_STATUS (AE_OK);
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}
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if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
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{
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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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}
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else
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{
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/* Transition to LEGACY mode */
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Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO,
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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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ACPI_EXPORT_SYMBOL (AcpiDisable)
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/*******************************************************************************
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*
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* FUNCTION: AcpiEnableEvent
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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
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AcpiEnableEvent (
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UINT32 Event,
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UINT32 Flags)
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{
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ACPI_STATUS Status = AE_OK;
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UINT32 Value;
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ACPI_FUNCTION_TRACE (AcpiEnableEvent);
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/* Decode the Fixed Event */
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if (Event > ACPI_EVENT_MAX)
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{
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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 enable
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* register bit)
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*/
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Status = AcpiWriteBitRegister (
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AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
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ACPI_ENABLE_EVENT);
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if (ACPI_FAILURE (Status))
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{
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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 = AcpiReadBitRegister (
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AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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if (Value != 1)
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{
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ACPI_ERROR ((AE_INFO,
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"Could not enable %s event", AcpiUtGetEventName (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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ACPI_EXPORT_SYMBOL (AcpiEnableEvent)
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/*******************************************************************************
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*
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* FUNCTION: AcpiDisableEvent
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*
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* PARAMETERS: Event - The fixed event to be disabled
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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
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AcpiDisableEvent (
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UINT32 Event,
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UINT32 Flags)
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{
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ACPI_STATUS Status = AE_OK;
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UINT32 Value;
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ACPI_FUNCTION_TRACE (AcpiDisableEvent);
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/* Decode the Fixed Event */
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if (Event > ACPI_EVENT_MAX)
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{
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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 enable
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* register bit)
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*/
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Status = AcpiWriteBitRegister (
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AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
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ACPI_DISABLE_EVENT);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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Status = AcpiReadBitRegister (
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AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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if (Value != 0)
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{
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ACPI_ERROR ((AE_INFO,
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"Could not disable %s events", AcpiUtGetEventName (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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ACPI_EXPORT_SYMBOL (AcpiDisableEvent)
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/*******************************************************************************
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*
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* FUNCTION: AcpiClearEvent
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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
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AcpiClearEvent (
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UINT32 Event)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (AcpiClearEvent);
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/* Decode the Fixed Event */
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if (Event > ACPI_EVENT_MAX)
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{
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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 status
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* register bit)
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*/
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Status = AcpiWriteBitRegister (
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AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
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ACPI_CLEAR_STATUS);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiClearEvent)
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetEventStatus
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*
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* PARAMETERS: Event - The fixed event
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* EventStatus - 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
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AcpiGetEventStatus (
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UINT32 Event,
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ACPI_EVENT_STATUS *EventStatus)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (AcpiGetEventStatus);
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if (!EventStatus)
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{
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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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if (Event > ACPI_EVENT_MAX)
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{
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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 = AcpiReadBitRegister (
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AcpiGbl_FixedEventInfo[Event].StatusRegisterId, EventStatus);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiGetEventStatus)
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#endif /* !ACPI_REDUCED_HARDWARE */
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