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269 lines
8 KiB
C
269 lines
8 KiB
C
/******************************************************************************
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*
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* Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the
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* extended FADT-V5 sleep registers.
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2019, 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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#include "acpi.h"
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#include "accommon.h"
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwesleep")
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/*******************************************************************************
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*
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* FUNCTION: AcpiHwExecuteSleepMethod
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*
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* PARAMETERS: MethodPathname - Pathname of method to execute
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* IntegerArgument - Argument to pass to the method
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*
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* RETURN: None
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*
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* DESCRIPTION: Execute a sleep/wake related method with one integer argument
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* and no return value.
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*
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******************************************************************************/
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void
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AcpiHwExecuteSleepMethod (
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char *MethodPathname,
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UINT32 IntegerArgument)
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{
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ACPI_OBJECT_LIST ArgList;
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ACPI_OBJECT Arg;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (HwExecuteSleepMethod);
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/* One argument, IntegerArgument; No return value expected */
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ArgList.Count = 1;
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ArgList.Pointer = &Arg;
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Arg.Type = ACPI_TYPE_INTEGER;
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Arg.Integer.Value = (UINT64) IntegerArgument;
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Status = AcpiEvaluateObject (NULL, MethodPathname, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "While executing method %s",
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MethodPathname));
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiHwExtendedSleep
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*
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* PARAMETERS: SleepState - Which sleep state to enter
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enter a system sleep state via the extended FADT sleep
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* registers (V5 FADT).
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* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwExtendedSleep (
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UINT8 SleepState)
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{
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ACPI_STATUS Status;
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UINT8 SleepControl;
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UINT64 SleepStatus;
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ACPI_FUNCTION_TRACE (HwExtendedSleep);
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/* Extended sleep registers must be valid */
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if (!AcpiGbl_FADT.SleepControl.Address ||
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!AcpiGbl_FADT.SleepStatus.Address)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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/* Clear wake status (WAK_STS) */
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Status = AcpiWrite ((UINT64) ACPI_X_WAKE_STATUS,
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&AcpiGbl_FADT.SleepStatus);
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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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AcpiGbl_SystemAwakeAndRunning = FALSE;
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/*
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* Set the SLP_TYP and SLP_EN bits.
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*
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* Note: We only use the first value returned by the \_Sx method
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* (AcpiGbl_SleepTypeA) - As per ACPI specification.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
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"Entering sleep state [S%u]\n", SleepState));
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SleepControl = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
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ACPI_X_SLEEP_TYPE_MASK) | ACPI_X_SLEEP_ENABLE;
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/* Flush caches, as per ACPI specification */
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ACPI_FLUSH_CPU_CACHE ();
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Status = AcpiOsEnterSleep (SleepState, SleepControl, 0);
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if (Status == AE_CTRL_TERMINATE)
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{
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return_ACPI_STATUS (AE_OK);
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}
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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 = AcpiWrite ((UINT64) SleepControl, &AcpiGbl_FADT.SleepControl);
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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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/* Wait for transition back to Working State */
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do
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{
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Status = AcpiRead (&SleepStatus, &AcpiGbl_FADT.SleepStatus);
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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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} while (!(((UINT8) SleepStatus) & ACPI_X_WAKE_STATUS));
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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: AcpiHwExtendedWakePrep
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*
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* PARAMETERS: SleepState - Which sleep state we just exited
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform first part of OS-independent ACPI cleanup after
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* a sleep. Called with interrupts ENABLED.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwExtendedWakePrep (
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UINT8 SleepState)
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{
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ACPI_STATUS Status;
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UINT8 SleepTypeValue;
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ACPI_FUNCTION_TRACE (HwExtendedWakePrep);
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Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
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&AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
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if (ACPI_SUCCESS (Status))
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{
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SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
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ACPI_X_SLEEP_TYPE_MASK);
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(void) AcpiWrite ((UINT64) (SleepTypeValue | ACPI_X_SLEEP_ENABLE),
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&AcpiGbl_FADT.SleepControl);
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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: AcpiHwExtendedWake
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*
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* PARAMETERS: SleepState - Which sleep state we just exited
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
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* Called with interrupts ENABLED.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiHwExtendedWake (
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UINT8 SleepState)
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{
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ACPI_FUNCTION_TRACE (HwExtendedWake);
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/* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
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AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
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/* Execute the wake methods */
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AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WAKING);
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AcpiHwExecuteSleepMethod (METHOD_PATHNAME__WAK, SleepState);
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/*
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* Some BIOS code assumes that WAK_STS will be cleared on resume
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* and use it to determine whether the system is rebooting or
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* resuming. Clear WAK_STS for compatibility.
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*/
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(void) AcpiWrite ((UINT64) ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
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AcpiGbl_SystemAwakeAndRunning = TRUE;
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AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING);
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return_ACPI_STATUS (AE_OK);
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}
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