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/******************************************************************************
*
* Module Name: hwxface - Public ACPICA hardware interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME ("hwxface")
/******************************************************************************
*
* FUNCTION: AcpiReset
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Set reset register in memory or IO space. Note: Does not
* support reset register in PCI config space, this must be
* handled separately.
*
******************************************************************************/
ACPI_STATUS
AcpiReset (
void)
{
ACPI_GENERIC_ADDRESS *ResetReg;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiReset);
ResetReg = &AcpiGbl_FADT.ResetRegister;
/* Check if the reset register is supported */
if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) ||
!ResetReg->Address)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
if (ResetReg->SpaceId == ACPI_ADR_SPACE_SYSTEM_IO)
{
/*
* For I/O space, write directly to the OSL. This bypasses the port
* validation mechanism, which may block a valid write to the reset
* register.
*/
Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ResetReg->Address,
AcpiGbl_FADT.ResetValue, ResetReg->BitWidth);
}
else
{
/* Write the reset value to the reset register */
Status = AcpiHwWrite (AcpiGbl_FADT.ResetValue, ResetReg);
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiReset)
/******************************************************************************
*
* FUNCTION: AcpiRead
*
* PARAMETERS: Value - Where the value is returned
* Reg - GAS register structure
*
* RETURN: Status
*
* DESCRIPTION: Read from either memory or IO space.
*
* LIMITATIONS: <These limitations also apply to AcpiWrite>
* BitWidth must be exactly 8, 16, 32, or 64.
* SpaceID must be SystemMemory or SystemIO.
* BitOffset and AccessWidth are currently ignored, as there has
* not been a need to implement these.
*
******************************************************************************/
ACPI_STATUS
AcpiRead (
UINT64 *ReturnValue,
ACPI_GENERIC_ADDRESS *Reg)
{
UINT32 Value;
UINT32 Width;
UINT64 Address;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (AcpiRead);
if (!ReturnValue)
{
return (AE_BAD_PARAMETER);
}
/* Validate contents of the GAS register. Allow 64-bit transfers */
Status = AcpiHwValidateRegister (Reg, 64, &Address);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Width = Reg->BitWidth;
if (Width == 64)
{
Width = 32; /* Break into two 32-bit transfers */
}
/* Initialize entire 64-bit return value to zero */
*ReturnValue = 0;
Value = 0;
/*
* Two address spaces supported: Memory or IO. PCI_Config is
* not supported here because the GAS structure is insufficient
*/
if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
{
Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
Address, &Value, Width);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*ReturnValue = Value;
if (Reg->BitWidth == 64)
{
/* Read the top 32 bits */
Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
(Address + 4), &Value, 32);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*ReturnValue |= ((UINT64) Value << 32);
}
}
else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
{
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
Address, &Value, Width);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*ReturnValue = Value;
if (Reg->BitWidth == 64)
{
/* Read the top 32 bits */
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
(Address + 4), &Value, 32);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*ReturnValue |= ((UINT64) Value << 32);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n",
ACPI_FORMAT_UINT64 (*ReturnValue), Reg->BitWidth,
ACPI_FORMAT_UINT64 (Address),
AcpiUtGetRegionName (Reg->SpaceId)));
return (Status);
}
ACPI_EXPORT_SYMBOL (AcpiRead)
/******************************************************************************
*
* FUNCTION: AcpiWrite
*
* PARAMETERS: Value - Value to be written
* Reg - GAS register structure
*
* RETURN: Status
*
* DESCRIPTION: Write to either memory or IO space.
*
******************************************************************************/
ACPI_STATUS
AcpiWrite (
UINT64 Value,
ACPI_GENERIC_ADDRESS *Reg)
{
UINT32 Width;
UINT64 Address;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (AcpiWrite);
/* Validate contents of the GAS register. Allow 64-bit transfers */
Status = AcpiHwValidateRegister (Reg, 64, &Address);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Width = Reg->BitWidth;
if (Width == 64)
{
Width = 32; /* Break into two 32-bit transfers */
}
/*
* Two address spaces supported: Memory or IO. PCI_Config is
* not supported here because the GAS structure is insufficient
*/
if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
{
Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
Address, ACPI_LODWORD (Value), Width);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (Reg->BitWidth == 64)
{
Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
(Address + 4), ACPI_HIDWORD (Value), 32);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
}
else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
{
Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
Address, ACPI_LODWORD (Value), Width);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (Reg->BitWidth == 64)
{
Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
(Address + 4), ACPI_HIDWORD (Value), 32);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n",
ACPI_FORMAT_UINT64 (Value), Reg->BitWidth,
ACPI_FORMAT_UINT64 (Address),
AcpiUtGetRegionName (Reg->SpaceId)));
return (Status);
}
ACPI_EXPORT_SYMBOL (AcpiWrite)
/*******************************************************************************
*
* FUNCTION: AcpiReadBitRegister
*
* PARAMETERS: RegisterId - ID of ACPI Bit Register to access
* ReturnValue - Value that was read from the register,
* normalized to bit position zero.
*
* RETURN: Status and the value read from the specified Register. Value
* returned is normalized to bit0 (is shifted all the way right)
*
* DESCRIPTION: ACPI BitRegister read function. Does not acquire the HW lock.
*
* SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
* PM2 Control.
*
* Note: The hardware lock is not required when reading the ACPI bit registers
* since almost all of them are single bit and it does not matter that
* the parent hardware register can be split across two physical
* registers. The only multi-bit field is SLP_TYP in the PM1 control
* register, but this field does not cross an 8-bit boundary (nor does
* it make much sense to actually read this field.)
*
******************************************************************************/
ACPI_STATUS
AcpiReadBitRegister (
UINT32 RegisterId,
UINT32 *ReturnValue)
{
ACPI_BIT_REGISTER_INFO *BitRegInfo;
UINT32 RegisterValue;
UINT32 Value;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE_U32 (AcpiReadBitRegister, RegisterId);
/* Get the info structure corresponding to the requested ACPI Register */
BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
if (!BitRegInfo)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Read the entire parent register */
Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
&RegisterValue);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Normalize the value that was read, mask off other bits */
Value = ((RegisterValue & BitRegInfo->AccessBitMask)
>> BitRegInfo->BitPosition);
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"BitReg %X, ParentReg %X, Actual %8.8X, ReturnValue %8.8X\n",
RegisterId, BitRegInfo->ParentRegister, RegisterValue, Value));
*ReturnValue = Value;
return_ACPI_STATUS (AE_OK);
}
ACPI_EXPORT_SYMBOL (AcpiReadBitRegister)
/*******************************************************************************
*
* FUNCTION: AcpiWriteBitRegister
*
* PARAMETERS: RegisterId - ID of ACPI Bit Register to access
* Value - Value to write to the register, in bit
* position zero. The bit is automaticallly
* shifted to the correct position.
*
* RETURN: Status
*
* DESCRIPTION: ACPI Bit Register write function. Acquires the hardware lock
* since most operations require a read/modify/write sequence.
*
* SUPPORTS: Bit fields in PM1 Status, PM1 Enable, PM1 Control, and
* PM2 Control.
*
* Note that at this level, the fact that there may be actually two
* hardware registers (A and B - and B may not exist) is abstracted.
*
******************************************************************************/
ACPI_STATUS
AcpiWriteBitRegister (
UINT32 RegisterId,
UINT32 Value)
{
ACPI_BIT_REGISTER_INFO *BitRegInfo;
ACPI_CPU_FLAGS LockFlags;
UINT32 RegisterValue;
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE_U32 (AcpiWriteBitRegister, RegisterId);
/* Get the info structure corresponding to the requested ACPI Register */
BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
if (!BitRegInfo)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
/*
* At this point, we know that the parent register is one of the
* following: PM1 Status, PM1 Enable, PM1 Control, or PM2 Control
*/
if (BitRegInfo->ParentRegister != ACPI_REGISTER_PM1_STATUS)
{
/*
* 1) Case for PM1 Enable, PM1 Control, and PM2 Control
*
* Perform a register read to preserve the bits that we are not
* interested in
*/
Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
&RegisterValue);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
/*
* Insert the input bit into the value that was just read
* and write the register
*/
ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
BitRegInfo->AccessBitMask, Value);
Status = AcpiHwRegisterWrite (BitRegInfo->ParentRegister,
RegisterValue);
}
else
{
/*
* 2) Case for PM1 Status
*
* The Status register is different from the rest. Clear an event
* by writing 1, writing 0 has no effect. So, the only relevant
* information is the single bit we're interested in, all others
* should be written as 0 so they will be left unchanged.
*/
RegisterValue = ACPI_REGISTER_PREPARE_BITS (Value,
BitRegInfo->BitPosition, BitRegInfo->AccessBitMask);
/* No need to write the register if value is all zeros */
if (RegisterValue)
{
Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_STATUS,
RegisterValue);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"BitReg %X, ParentReg %X, Value %8.8X, Actual %8.8X\n",
RegisterId, BitRegInfo->ParentRegister, Value, RegisterValue));
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiWriteBitRegister)
/*******************************************************************************
*
* FUNCTION: AcpiGetSleepTypeData
*
* PARAMETERS: SleepState - Numeric sleep state
* *SleepTypeA - Where SLP_TYPa is returned
* *SleepTypeB - Where SLP_TYPb is returned
*
* RETURN: Status - ACPI status
*
* DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
* state.
*
******************************************************************************/
ACPI_STATUS
AcpiGetSleepTypeData (
UINT8 SleepState,
UINT8 *SleepTypeA,
UINT8 *SleepTypeB)
{
ACPI_STATUS Status = AE_OK;
ACPI_EVALUATE_INFO *Info;
ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData);
/* Validate parameters */
if ((SleepState > ACPI_S_STATES_MAX) ||
!SleepTypeA ||
!SleepTypeB)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Allocate the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->Pathname = ACPI_CAST_PTR (char, AcpiGbl_SleepStateNames[SleepState]);
/* Evaluate the namespace object containing the values for this state */
Status = AcpiNsEvaluate (Info);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"%s while evaluating SleepState [%s]\n",
AcpiFormatException (Status), Info->Pathname));
goto Cleanup;
}
/* Must have a return object */
if (!Info->ReturnObject)
{
ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]",
Info->Pathname));
Status = AE_NOT_EXIST;
}
/* It must be of type Package */
else 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;
}
/*
* The package must have at least two elements. NOTE (March 2005): This
* goes against the current ACPI spec which defines this object as a
* package with one encoded DWORD element. However, existing practice
* by BIOS vendors seems to be to have 2 or more elements, at least
* one per sleep type (A/B).
*/
else if (Info->ReturnObject->Package.Count < 2)
{
ACPI_ERROR ((AE_INFO,
"Sleep State return package does not have at least two elements"));
Status = AE_AML_NO_OPERAND;
}
/* The first two elements must both be of type Integer */
else if (((Info->ReturnObject->Package.Elements[0])->Common.Type
!= ACPI_TYPE_INTEGER) ||
((Info->ReturnObject->Package.Elements[1])->Common.Type
!= ACPI_TYPE_INTEGER))
{
ACPI_ERROR ((AE_INFO,
"Sleep State return package elements are not both Integers "
"(%s, %s)",
AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[0]),
AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[1])));
Status = AE_AML_OPERAND_TYPE;
}
else
{
/* Valid _Sx_ package size, type, and value */
*SleepTypeA = (UINT8)
(Info->ReturnObject->Package.Elements[0])->Integer.Value;
*SleepTypeB = (UINT8)
(Info->ReturnObject->Package.Elements[1])->Integer.Value;
}
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"While evaluating SleepState [%s], bad Sleep object %p type %s",
Info->Pathname, Info->ReturnObject,
AcpiUtGetObjectTypeName (Info->ReturnObject)));
}
AcpiUtRemoveReference (Info->ReturnObject);
Cleanup:
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData)