williamr@2: // Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
williamr@2: // All rights reserved.
williamr@2: // This component and the accompanying materials are made available
williamr@2: // under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
williamr@2: // which accompanies this distribution, and is available
williamr@2: // at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
williamr@2: //
williamr@2: // Initial Contributors:
williamr@2: // Nokia Corporation - initial contribution.
williamr@2: //
williamr@2: // Contributors:
williamr@2: //
williamr@2: // Description:
williamr@2: // hal\inc\hal_int.h
williamr@2: // 
williamr@2: //
williamr@2: 
williamr@2: #ifndef __HAL_INT_H__
williamr@2: #define __HAL_INT_H__
williamr@2: 
williamr@2: #include <hal.h>
williamr@2: #include <e32svr.h>
williamr@2: 
williamr@2: /**
williamr@2: @publishedPartner
williamr@2: @released
williamr@2: 
williamr@2: The signature for accessor functions for derived attributes
williamr@2: 
williamr@2: @param aDeviceNumber A device number is applicable when a system has
williamr@2: multiple instances of a device. The parameter specifies which one to
williamr@2: interrogate. Eg. a phone may have 2 displays, so it's HAL accessor functions
williamr@2: would access different information depending on whether aDeviceNumber was 0 or 1.
williamr@2: 
williamr@2: @param aAttrib The HAL attribute to access.
williamr@2: @param aSet ETrue if the specified attribute should be modified; EFalse for a read.
williamr@2: @param aInOut A pointer to a TInt. If aSet is:
williamr@2: 	- ETrue it points to the new value to be written.
williamr@2: 	- EFalse it is used to return the value read.
williamr@2: 	  It may also be used to pass an argument in,
williamr@2: 	  in order to select one of multiple values to retreive.
williamr@2: 	  If it is equal to -1 then the function must
williamr@2: 	  return KErrArgument so that callers can identify that
williamr@2: 	  the function uses aInOut as an input even when aSet is false.
williamr@2: 
williamr@2: @return An error code
williamr@2: 	- KErrNone
williamr@2: 	- KErrArgument aInOut was invalid (may occur for aSet true or false)
williamr@2: */
williamr@2: typedef TInt (*THalImplementation)(TInt aDeviceNumber, TInt aAttrib, TBool aSet, TAny* aInOut);
williamr@2: 
williamr@2: /**
williamr@2: @internalComponent
williamr@2: */
williamr@2: class HalInternal
williamr@2: 	{
williamr@2: public:
williamr@2: 	static const TUint8 Properties[HAL::ENumHalAttributes];
williamr@2: 	static const TInt Offset[HAL::ENumHalAttributes];
williamr@2: 	// InitialValue[] is only exported for patchdata purposes (other executables
williamr@2: 	// must not import this array; all access should be through the published Hal
williamr@2: 	// APIs).  EXPORT_C needs to be on the declaration here so that it has external
williamr@2: 	// linkage (class data is treated differently to non-class data).
williamr@2: 	EXPORT_C static const TInt InitialValue[HAL::ENumHalAttributes];
williamr@2: 	static const THalImplementation Implementation[HAL::ENumHalAttributes];
williamr@2: 	static const TInt HalDataSize;
williamr@2: 
williamr@2: 	enum THalPanic
williamr@2: 		{
williamr@2: 		EReadOffsetInvalid=0,
williamr@2: 		EWriteOffsetInvalid=1,
williamr@2: 		EInitialAllocFailed1=2,
williamr@2: 		EInitialAllocFailed2=3,
williamr@2: 		EInitialWriteFailed=4,
williamr@2: 		EInitialWriteFailed2=5,
williamr@2: 		ETlsSizeInvalid=6,
williamr@2: 		ENoSuchHalProp=7,
williamr@2: 		EGetPropFailed=8,
williamr@2: 		ESetPropFailed=9
williamr@2: 		};
williamr@2: 
williamr@2: 	static void Panic(THalPanic aPanic);
williamr@2: 	static void InitialiseData();
williamr@2: 	static TInt ReadWord(TInt anOffset);
williamr@2: 	static TInt WriteWord(TInt anOffset, TInt aValue);
williamr@2: 	};
williamr@2: 
williamr@2: #endif