acpica/hardware/hwsleep.c

	hwsleep.c revision 7b1019a6d29ccb7999dc76cba3dde1c627e8e609
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/******************************************************************************
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support functions for the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *                   original/legacy sleep/PM registers.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *****************************************************************************/
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Copyright (C) 2000 - 2016, Intel Corp.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * All rights reserved.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Redistribution and use in source and binary forms, with or without
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * modification, are permitted provided that the following conditions
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * are met:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * 1. Redistributions of source code must retain the above copyright
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    notice, this list of conditions, and the following disclaimer,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    without modification.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * 2. Redistributions in binary form must reproduce at minimum a disclaimer
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    substantially similar to the "NO WARRANTY" disclaimer below
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    ("Disclaimer") and any redistribution must be conditioned upon
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    including a substantially similar Disclaimer requirement for further
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    binary redistribution.
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor * 3. Neither the names of the above-listed copyright holders nor the names
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    of any contributors may be used to endorse or promote products derived
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *    from this software without specific prior written permission.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Alternatively, this software may be distributed under the terms of the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * GNU General Public License ("GPL") version 2 as published by the Free
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Software Foundation.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * NO WARRANTY
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * POSSIBILITY OF SUCH DAMAGES.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "acpi.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "accommon.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor#define _COMPONENT          ACPI_HARDWARE
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor        ACPI_MODULE_NAME    ("hwsleep")
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*******************************************************************************
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * FUNCTION:    AcpiHwLegacySleep
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * PARAMETERS:  SleepState          - Which sleep state to enter
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * RETURN:      Status
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor ******************************************************************************/
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill TaylorACPI_STATUS
17a2b317610f531d565bf4e940433aab2d9e6985Bill TaylorAcpiHwLegacySleep (
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT8                   SleepState)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor{
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_BIT_REGISTER_INFO  *SleepTypeRegInfo;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_BIT_REGISTER_INFO  *SleepEnableRegInfo;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT32                  Pm1aControl;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT32                  Pm1bControl;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT32                  InValue;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_STATUS             Status;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_FUNCTION_TRACE (HwLegacySleep);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Clear wake status */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS,
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor        ACPI_CLEAR_STATUS);
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    if (ACPI_FAILURE (Status))
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    {
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor        return_ACPI_STATUS (Status);
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    }
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Clear all fixed and general purpose status bits */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwClearAcpiStatus ();
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor    }
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor    /*
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor     * 1) Disable/Clear all GPEs
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * 2) Enable all wakeup GPEs
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwDisableAllGpes ();
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    AcpiGbl_SystemAwakeAndRunning = FALSE;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwEnableAllWakeupGpes ();
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Get current value of PM1A control */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        &Pm1aControl);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        "Entering sleep state [S%u]\n", SleepState));
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Clear the SLP_EN and SLP_TYP fields */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor         SleepEnableRegInfo->AccessBitMask);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Pm1bControl = Pm1aControl;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Insert the SLP_TYP bits */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    /*
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor     * We split the writes of SLP_TYP and SLP_EN to workaround
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * poorly implemented hardware.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Write #1: write the SLP_TYP data to the PM1 Control registers */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Insert the sleep enable (SLP_EN) bit */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Pm1aControl |= SleepEnableRegInfo->AccessBitMask;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Pm1bControl |= SleepEnableRegInfo->AccessBitMask;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Flush caches, as per ACPI specification */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_FLUSH_CPU_CACHE ();
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Write #2: Write both SLP_TYP + SLP_EN */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    if (SleepState > ACPI_STATE_S3)
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    {
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        /*
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         * We wanted to sleep > S3, but it didn't happen (by virtue of the
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         * fact that we are still executing!)
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         *
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         * Wait ten seconds, then try again. This is to get S4/S5 to work on
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         * all machines.
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         *
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         * We wait so long to allow chipsets that poll this reg very slowly
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         * to still read the right value. Ideally, this block would go
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         * away entirely.
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor         */
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        AcpiOsStall (10 * ACPI_USEC_PER_SEC);
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL,
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor            SleepEnableRegInfo->AccessBitMask);
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        if (ACPI_FAILURE (Status))
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        {
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor            return_ACPI_STATUS (Status);
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        }
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    }
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    /* Wait for transition back to Working State */
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    do
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        {
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor            return_ACPI_STATUS (Status);
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        }
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor    } while (!InValue);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    return_ACPI_STATUS (AE_OK);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor}
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*******************************************************************************
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * FUNCTION:    AcpiHwLegacyWakePrep
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * PARAMETERS:  SleepState          - Which sleep state we just exited
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * RETURN:      Status
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *              sleep.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *              Called with interrupts ENABLED.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor ******************************************************************************/
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill TaylorACPI_STATUS
9e39c5ba00a55fa05777cc94b148296af305e135Bill TaylorAcpiHwLegacyWakePrep (
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT8                   SleepState)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor{
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_STATUS             Status;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_BIT_REGISTER_INFO  *SleepTypeRegInfo;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_BIT_REGISTER_INFO  *SleepEnableRegInfo;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT32                  Pm1aControl;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT32                  Pm1bControl;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_FUNCTION_TRACE (HwLegacyWakePrep);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * Set SLP_TYPE and SLP_EN to state S0.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * This is unclear from the ACPI Spec, but it is required
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * by some machines.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_SUCCESS (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        SleepTypeRegInfo =
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        SleepEnableRegInfo =
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        /* Get current value of PM1A control */
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor        Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
1ed53a3f65abecaadc1b967e341970ad0f6b2aebBill Taylor            &Pm1aControl);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        if (ACPI_SUCCESS (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            /* Clear the SLP_EN and SLP_TYP fields */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                SleepEnableRegInfo->AccessBitMask);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            Pm1bControl = Pm1aControl;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            /* Insert the SLP_TYP bits */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            Pm1aControl |= (AcpiGbl_SleepTypeA <<
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                SleepTypeRegInfo->BitPosition);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            Pm1bControl |= (AcpiGbl_SleepTypeB <<
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor                SleepTypeRegInfo->BitPosition);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            /* Write the control registers and ignore any errors */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri    return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor}
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*******************************************************************************
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * FUNCTION:    AcpiHwLegacyWake
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * PARAMETERS:  SleepState          - Which sleep state we just exited
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * RETURN:      Status
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *              Called with interrupts ENABLED.
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor *
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor ******************************************************************************/
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill Taylor
c7facc54c4abed9e554ff80225311e6b7048d3c9Bill TaylorACPI_STATUS
9e39c5ba00a55fa05777cc94b148296af305e135Bill TaylorAcpiHwLegacyWake (
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    UINT8                   SleepState)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor{
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_STATUS             Status;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    ACPI_FUNCTION_TRACE (HwLegacyWake);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
17a2b317610f531d565bf4e940433aab2d9e6985Bill Taylor    /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri    AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WAKING);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * GPEs must be enabled before _WAK is called as GPEs
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * might get fired there
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * Restore the GPEs:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * 1) Disable/Clear all GPEs
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * 2) Enable all runtime GPEs
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwDisableAllGpes ();
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    Status = AcpiHwEnableAllRuntimeGpes ();
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (ACPI_FAILURE (Status))
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * Now we can execute _WAK, etc. Some machines require that the GPEs
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri     * are enabled before the wake methods are executed.
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__WAK, SleepState);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri    /*
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri     * Some BIOS code assumes that WAK_STS will be cleared on resume
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * and use it to determine whether the system is rebooting or
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * resuming. Clear WAK_STS for compatibility.
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    (void) AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        ACPI_CLEAR_STATUS);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    AcpiGbl_SystemAwakeAndRunning = TRUE;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* Enable power button */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    (void) AcpiWriteBitRegister(
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            ACPI_ENABLE_EVENT);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    (void) AcpiWriteBitRegister(
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            ACPI_CLEAR_STATUS);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    return_ACPI_STATUS (Status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor}
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri#endif /* !ACPI_REDUCED_HARDWARE */
dd9e16da4243358c2e9251a4ca5d50f56e0adc68agiri