654 lines
19 KiB
C
654 lines
19 KiB
C
/******************************************************************************
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*
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* Module Name: hwxface - Public ACPICA hardware interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2015, 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 EXPORT_ACPI_INTERFACES
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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/acnamesp.h>
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwxface")
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/******************************************************************************
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*
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* FUNCTION: AcpiReset
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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: Set reset register in memory or IO space. Note: Does not
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* support reset register in PCI config space, this must be
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* handled separately.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiReset (
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void)
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{
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ACPI_GENERIC_ADDRESS *ResetReg;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiReset);
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ResetReg = &AcpiGbl_FADT.ResetRegister;
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/* Check if the reset register is supported */
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if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) ||
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!ResetReg->Address)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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if (ResetReg->SpaceId == ACPI_ADR_SPACE_SYSTEM_IO)
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{
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/*
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* For I/O space, write directly to the OSL. This bypasses the port
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* validation mechanism, which may block a valid write to the reset
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* register.
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*
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* NOTE:
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* The ACPI spec requires the reset register width to be 8, so we
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* hardcode it here and ignore the FADT value. This maintains
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* compatibility with other ACPI implementations that have allowed
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* BIOS code with bad register width values to go unnoticed.
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*/
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Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address,
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AcpiGbl_FADT.ResetValue, ACPI_RESET_REGISTER_WIDTH);
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}
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else
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{
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/* Write the reset value to the reset register */
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Status = AcpiHwWrite (AcpiGbl_FADT.ResetValue, ResetReg);
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}
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiReset)
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/******************************************************************************
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*
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* FUNCTION: AcpiRead
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*
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* PARAMETERS: Value - Where the value is returned
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* Reg - GAS register structure
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from either memory or IO space.
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*
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* LIMITATIONS: <These limitations also apply to AcpiWrite>
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* BitWidth must be exactly 8, 16, 32, or 64.
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* SpaceID must be SystemMemory or SystemIO.
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* BitOffset and AccessWidth are currently ignored, as there has
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* not been a need to implement these.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRead (
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UINT64 *ReturnValue,
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ACPI_GENERIC_ADDRESS *Reg)
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{
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UINT32 ValueLo;
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UINT32 ValueHi;
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UINT32 Width;
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UINT64 Address;
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ACPI_STATUS Status;
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ACPI_FUNCTION_NAME (AcpiRead);
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if (!ReturnValue)
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{
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return (AE_BAD_PARAMETER);
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}
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/* Validate contents of the GAS register. Allow 64-bit transfers */
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Status = AcpiHwValidateRegister (Reg, 64, &Address);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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/*
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* Two address spaces supported: Memory or I/O. PCI_Config is
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* not supported here because the GAS structure is insufficient
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*/
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if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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{
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Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
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Address, ReturnValue, Reg->BitWidth);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
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{
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ValueLo = 0;
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ValueHi = 0;
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Width = Reg->BitWidth;
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if (Width == 64)
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{
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Width = 32; /* Break into two 32-bit transfers */
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}
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Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
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Address, &ValueLo, Width);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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if (Reg->BitWidth == 64)
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{
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/* Read the top 32 bits */
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Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
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(Address + 4), &ValueHi, 32);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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/* Set the return value only if status is AE_OK */
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*ReturnValue = (ValueLo | ((UINT64) ValueHi << 32));
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n",
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ACPI_FORMAT_UINT64 (*ReturnValue), Reg->BitWidth,
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ACPI_FORMAT_UINT64 (Address),
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AcpiUtGetRegionName (Reg->SpaceId)));
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return (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiRead)
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/******************************************************************************
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*
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* FUNCTION: AcpiWrite
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*
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* PARAMETERS: Value - Value to be written
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* Reg - GAS register structure
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write to either memory or IO space.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiWrite (
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UINT64 Value,
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ACPI_GENERIC_ADDRESS *Reg)
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{
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UINT32 Width;
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UINT64 Address;
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ACPI_STATUS Status;
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ACPI_FUNCTION_NAME (AcpiWrite);
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/* Validate contents of the GAS register. Allow 64-bit transfers */
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Status = AcpiHwValidateRegister (Reg, 64, &Address);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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/*
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* Two address spaces supported: Memory or IO. PCI_Config is
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* not supported here because the GAS structure is insufficient
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*/
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if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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{
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Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
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Address, Value, Reg->BitWidth);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
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{
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Width = Reg->BitWidth;
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if (Width == 64)
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{
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Width = 32; /* Break into two 32-bit transfers */
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}
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Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
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Address, ACPI_LODWORD (Value), Width);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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if (Reg->BitWidth == 64)
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{
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Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
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(Address + 4), ACPI_HIDWORD (Value), 32);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n",
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ACPI_FORMAT_UINT64 (Value), Reg->BitWidth,
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ACPI_FORMAT_UINT64 (Address),
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AcpiUtGetRegionName (Reg->SpaceId)));
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return (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiWrite)
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#if (!ACPI_REDUCED_HARDWARE)
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/*******************************************************************************
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*
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* FUNCTION: AcpiReadBitRegister
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*
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* PARAMETERS: RegisterId - ID of ACPI Bit Register to access
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* ReturnValue - Value that was read from the register,
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* normalized to bit position zero.
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*
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* RETURN: Status and the value read from the specified Register. Value
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* returned is normalized to bit0 (is shifted all the way right)
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*
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* DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock.
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*
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* SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
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* PM2 Control.
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*
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* Note: The hardware lock is not required when reading the ACPI bit registers
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* since almost all of them are single bit and it does not matter that
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* the parent hardware register can be split across two physical
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* registers. The only multi-bit field is SLP_TYP in the PM1 control
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* register, but this field does not cross an 8-bit boundary (nor does
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* it make much sense to actually read this field.)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiReadBitRegister (
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UINT32 RegisterId,
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UINT32 *ReturnValue)
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{
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ACPI_BIT_REGISTER_INFO *BitRegInfo;
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UINT32 RegisterValue;
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UINT32 Value;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId);
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/* Get the info structure corresponding to the requested ACPI Register */
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BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
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if (!BitRegInfo)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Read the entire parent register */
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Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
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&RegisterValue);
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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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/* Normalize the value that was read, mask off other bits */
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Value = ((RegisterValue & BitRegInfo->AccessBitMask)
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>> BitRegInfo->BitPosition);
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n",
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RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value));
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*ReturnValue = Value;
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiReadBitRegister)
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/*******************************************************************************
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*
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* FUNCTION: AcpiWriteBitRegister
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*
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* PARAMETERS: RegisterId - ID of ACPI Bit Register to access
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* Value - Value to write to the register, in bit
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* position zero. The bit is automatically
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* shifted to the correct position.
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*
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* RETURN: Status
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*
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* DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock
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* since most operations require a read/modify/write sequence.
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*
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* SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
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* PM2 Control.
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*
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* Note that at this level, the fact that there may be actually two
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* hardware registers (A and B - and B may not exist) is abstracted.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiWriteBitRegister (
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UINT32 RegisterId,
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UINT32 Value)
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{
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ACPI_BIT_REGISTER_INFO *BitRegInfo;
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ACPI_CPU_FLAGS LockFlags;
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UINT32 RegisterValue;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId);
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/* Get the info structure corresponding to the requested ACPI Register */
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BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
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if (!BitRegInfo)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
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/*
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* At this point, we know that the parent register is one of the
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* following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control
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*/
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if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS)
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{
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/*
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* 1) Case for PM1 Enable, PM1 Control, and PM2 Control
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*
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* Perform a register read to preserve the bits that we are not
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* interested in
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*/
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Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
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&RegisterValue);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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/*
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* Insert the input bit into the value that was just read
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* and write the register
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*/
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ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
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BitRegInfo->AccessBitMask, Value);
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Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister,
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RegisterValue);
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}
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else
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{
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/*
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* 2) Case for PM1 Status
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*
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* The Status register is different from the rest. Clear an event
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* by writing 1, writing 0 has no effect. So, the only relevant
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* information is the single bit we're interested in, all others
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* should be written as 0 so they will be left unchanged.
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*/
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RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value,
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BitRegInfo->BitPosition, BitRegInfo->AccessBitMask);
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/* No need to write the register if value is all zeros */
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if (RegisterValue)
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{
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Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS,
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RegisterValue);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n",
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RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue));
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UnlockAndExit:
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AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiWriteBitRegister)
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#endif /* !ACPI_REDUCED_HARDWARE */
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetSleepTypeData
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*
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* PARAMETERS: SleepState - Numeric sleep state
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* *SleepTypeA - Where SLP_TYPa is returned
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* *SleepTypeB - Where SLP_TYPb is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested
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* sleep state via the appropriate \_Sx object.
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*
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* The sleep state package returned from the corresponding \_Sx_ object
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* must contain at least one integer.
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*
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* March 2005:
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* Added support for a package that contains two integers. This
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* goes against the ACPI specification which defines this object as a
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* package with one encoded DWORD integer. However, existing practice
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* by many BIOS vendors is to return a package with 2 or more integer
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* elements, at least one per sleep type (A/B).
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*
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* January 2013:
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* Therefore, we must be prepared to accept a package with either a
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* single integer or multiple integers.
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*
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* The single integer DWORD format is as follows:
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* BYTE 0 - Value for the PM1A SLP_TYP register
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* BYTE 1 - Value for the PM1B SLP_TYP register
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* BYTE 2-3 - Reserved
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*
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* The dual integer format is as follows:
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* Integer 0 - Value for the PM1A SLP_TYP register
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* Integer 1 - Value for the PM1A SLP_TYP register
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetSleepTypeData (
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UINT8 SleepState,
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UINT8 *SleepTypeA,
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UINT8 *SleepTypeB)
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{
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ACPI_STATUS Status;
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ACPI_EVALUATE_INFO *Info;
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ACPI_OPERAND_OBJECT **Elements;
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ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData);
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/* Validate parameters */
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if ((SleepState > ACPI_S_STATES_MAX) ||
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!SleepTypeA || !SleepTypeB)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Allocate the evaluation information block */
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Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
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if (!Info)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/*
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* Evaluate the \_Sx namespace object containing the register values
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* for this state
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*/
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|
Info->RelativePathname = ACPI_CAST_PTR (
|
|
char, AcpiGbl_SleepStateNames[SleepState]);
|
|
Status = AcpiNsEvaluate (Info);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Must have a return object */
|
|
|
|
if (!Info->ReturnObject)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]",
|
|
Info->RelativePathname));
|
|
Status = AE_AML_NO_RETURN_VALUE;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Return object must be of type Package */
|
|
|
|
if (Info->ReturnObject->Common.Type != ACPI_TYPE_PACKAGE)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package"));
|
|
Status = AE_AML_OPERAND_TYPE;
|
|
goto Cleanup1;
|
|
}
|
|
|
|
/*
|
|
* Any warnings about the package length or the object types have
|
|
* already been issued by the predefined name module -- there is no
|
|
* need to repeat them here.
|
|
*/
|
|
Elements = Info->ReturnObject->Package.Elements;
|
|
switch (Info->ReturnObject->Package.Count)
|
|
{
|
|
case 0:
|
|
|
|
Status = AE_AML_PACKAGE_LIMIT;
|
|
break;
|
|
|
|
case 1:
|
|
|
|
if (Elements[0]->Common.Type != ACPI_TYPE_INTEGER)
|
|
{
|
|
Status = AE_AML_OPERAND_TYPE;
|
|
break;
|
|
}
|
|
|
|
/* A valid _Sx_ package with one integer */
|
|
|
|
*SleepTypeA = (UINT8) Elements[0]->Integer.Value;
|
|
*SleepTypeB = (UINT8) (Elements[0]->Integer.Value >> 8);
|
|
break;
|
|
|
|
case 2:
|
|
default:
|
|
|
|
if ((Elements[0]->Common.Type != ACPI_TYPE_INTEGER) ||
|
|
(Elements[1]->Common.Type != ACPI_TYPE_INTEGER))
|
|
{
|
|
Status = AE_AML_OPERAND_TYPE;
|
|
break;
|
|
}
|
|
|
|
/* A valid _Sx_ package with two integers */
|
|
|
|
*SleepTypeA = (UINT8) Elements[0]->Integer.Value;
|
|
*SleepTypeB = (UINT8) Elements[1]->Integer.Value;
|
|
break;
|
|
}
|
|
|
|
Cleanup1:
|
|
AcpiUtRemoveReference (Info->ReturnObject);
|
|
|
|
Cleanup:
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"While evaluating Sleep State [%s]", Info->RelativePathname));
|
|
}
|
|
|
|
ACPI_FREE (Info);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData)
|