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| Current File : //sys/contrib/dev/acpica/utilities/utids.c |
/******************************************************************************
*
* Module Name: utids - support for device IDs - HID, UID, CID
*
*****************************************************************************/
/*
* 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.
*/
#define __UTIDS_C__
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acinterp.h>
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utids")
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_HID
*
* PARAMETERS: DeviceNode - Node for the device
* ReturnId - Where the string HID is returned
*
* RETURN: Status
*
* DESCRIPTION: Executes the _HID control method that returns the hardware
* ID of the device. The HID is either an 32-bit encoded EISAID
* Integer or a String. A string is always returned. An EISAID
* is converted to a string.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_HID (
ACPI_NAMESPACE_NODE *DeviceNode,
ACPI_DEVICE_ID **ReturnId)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_DEVICE_ID *Hid;
UINT32 Length;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtExecute_HID);
Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__HID,
ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Get the size of the String to be returned, includes null terminator */
if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
{
Length = ACPI_EISAID_STRING_SIZE;
}
else
{
Length = ObjDesc->String.Length + 1;
}
/* Allocate a buffer for the HID */
Hid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_ID) + (ACPI_SIZE) Length);
if (!Hid)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Area for the string starts after DEVICE_ID struct */
Hid->String = ACPI_ADD_PTR (char, Hid, sizeof (ACPI_DEVICE_ID));
/* Convert EISAID to a string or simply copy existing string */
if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
{
AcpiExEisaIdToString (Hid->String, ObjDesc->Integer.Value);
}
else
{
ACPI_STRCPY (Hid->String, ObjDesc->String.Pointer);
}
Hid->Length = Length;
*ReturnId = Hid;
Cleanup:
/* On exit, we must delete the return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_UID
*
* PARAMETERS: DeviceNode - Node for the device
* ReturnId - Where the string UID is returned
*
* RETURN: Status
*
* DESCRIPTION: Executes the _UID control method that returns the unique
* ID of the device. The UID is either a 64-bit Integer (NOT an
* EISAID) or a string. Always returns a string. A 64-bit integer
* is converted to a decimal string.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_UID (
ACPI_NAMESPACE_NODE *DeviceNode,
ACPI_DEVICE_ID **ReturnId)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_DEVICE_ID *Uid;
UINT32 Length;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtExecute_UID);
Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__UID,
ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Get the size of the String to be returned, includes null terminator */
if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
{
Length = ACPI_MAX64_DECIMAL_DIGITS + 1;
}
else
{
Length = ObjDesc->String.Length + 1;
}
/* Allocate a buffer for the UID */
Uid = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_ID) + (ACPI_SIZE) Length);
if (!Uid)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Area for the string starts after DEVICE_ID struct */
Uid->String = ACPI_ADD_PTR (char, Uid, sizeof (ACPI_DEVICE_ID));
/* Convert an Integer to string, or just copy an existing string */
if (ObjDesc->Common.Type == ACPI_TYPE_INTEGER)
{
AcpiExIntegerToString (Uid->String, ObjDesc->Integer.Value);
}
else
{
ACPI_STRCPY (Uid->String, ObjDesc->String.Pointer);
}
Uid->Length = Length;
*ReturnId = Uid;
Cleanup:
/* On exit, we must delete the return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_CID
*
* PARAMETERS: DeviceNode - Node for the device
* ReturnCidList - Where the CID list is returned
*
* RETURN: Status, list of CID strings
*
* DESCRIPTION: Executes the _CID control method that returns one or more
* compatible hardware IDs for the device.
*
* NOTE: Internal function, no parameter validation
*
* A _CID method can return either a single compatible ID or a package of
* compatible IDs. Each compatible ID can be one of the following:
* 1) Integer (32 bit compressed EISA ID) or
* 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
*
* The Integer CIDs are converted to string format by this function.
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_CID (
ACPI_NAMESPACE_NODE *DeviceNode,
ACPI_DEVICE_ID_LIST **ReturnCidList)
{
ACPI_OPERAND_OBJECT **CidObjects;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_DEVICE_ID_LIST *CidList;
char *NextIdString;
UINT32 StringAreaSize;
UINT32 Length;
UINT32 CidListSize;
ACPI_STATUS Status;
UINT32 Count;
UINT32 i;
ACPI_FUNCTION_TRACE (UtExecute_CID);
/* Evaluate the _CID method for this device */
Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__CID,
ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE,
&ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Get the count and size of the returned _CIDs. _CID can return either
* a Package of Integers/Strings or a single Integer or String.
* Note: This section also validates that all CID elements are of the
* correct type (Integer or String).
*/
if (ObjDesc->Common.Type == ACPI_TYPE_PACKAGE)
{
Count = ObjDesc->Package.Count;
CidObjects = ObjDesc->Package.Elements;
}
else /* Single Integer or String CID */
{
Count = 1;
CidObjects = &ObjDesc;
}
StringAreaSize = 0;
for (i = 0; i < Count; i++)
{
/* String lengths include null terminator */
switch (CidObjects[i]->Common.Type)
{
case ACPI_TYPE_INTEGER:
StringAreaSize += ACPI_EISAID_STRING_SIZE;
break;
case ACPI_TYPE_STRING:
StringAreaSize += CidObjects[i]->String.Length + 1;
break;
default:
Status = AE_TYPE;
goto Cleanup;
}
}
/*
* Now that we know the length of the CIDs, allocate return buffer:
* 1) Size of the base structure +
* 2) Size of the CID DEVICE_ID array +
* 3) Size of the actual CID strings
*/
CidListSize = sizeof (ACPI_DEVICE_ID_LIST) +
((Count - 1) * sizeof (ACPI_DEVICE_ID)) +
StringAreaSize;
CidList = ACPI_ALLOCATE_ZEROED (CidListSize);
if (!CidList)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Area for CID strings starts after the CID DEVICE_ID array */
NextIdString = ACPI_CAST_PTR (char, CidList->Ids) +
((ACPI_SIZE) Count * sizeof (ACPI_DEVICE_ID));
/* Copy/convert the CIDs to the return buffer */
for (i = 0; i < Count; i++)
{
if (CidObjects[i]->Common.Type == ACPI_TYPE_INTEGER)
{
/* Convert the Integer (EISAID) CID to a string */
AcpiExEisaIdToString (NextIdString, CidObjects[i]->Integer.Value);
Length = ACPI_EISAID_STRING_SIZE;
}
else /* ACPI_TYPE_STRING */
{
/* Copy the String CID from the returned object */
ACPI_STRCPY (NextIdString, CidObjects[i]->String.Pointer);
Length = CidObjects[i]->String.Length + 1;
}
CidList->Ids[i].String = NextIdString;
CidList->Ids[i].Length = Length;
NextIdString += Length;
}
/* Finish the CID list */
CidList->Count = Count;
CidList->ListSize = CidListSize;
*ReturnCidList = CidList;
Cleanup:
/* On exit, we must delete the _CID return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}