systemswstubs/examplecommonisc/IscDriver/inc/IscDevice.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 14 Jan 2010 07:14:53 +0200
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/*
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* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#ifndef ISCDEVICE_H
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#define ISCDEVICE_H
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//  INCLUDES
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#include <kernel.h>
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// CONSTANTS
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// MACROS
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// DATA TYPES
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// FUNCTION PROTOTYPES
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// FORWARD DECLARATIONS
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class DIscDataTransmissionBase;
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class DIscMultiplexerBase;
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class DIscChannel;
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class DIscMainRcvBuffer;
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class DIscQueue;
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class DIscSendQueue;
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class TIscSendFrameInfo;
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// CLASS DECLARATION
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/**
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*  Isc driver ldd factory object
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*
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*  @lib IscDriver.LIB
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*  @since 2.8
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*/
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class DIscDevice : public DLogicalDevice
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    {
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    public:  // Constructors and destructor
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         /**
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        * C++ default constructor.
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        */
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        IMPORT_C DIscDevice();
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        /**
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        * Destructor.
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        */
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        IMPORT_C virtual ~DIscDevice();
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    public: // Functions from base classes
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        /**
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        * From DLogicalDevice. 
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        * Create a logical channel
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        * @since 2.8
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        * @param DLogicalChannelBase*& aChannel logical channel to be set
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        * @return TInt KErrNone if succesful, otherwise KErrNoMemory
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        */
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        virtual TInt Create( DLogicalChannelBase*& aChannel );
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        /**
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        * Complete the installation of driver
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        * @since 2.8
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        * @return TInt KErrNone if successful 
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        */
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        virtual TInt Install();
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         /**
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        * From DLogicalDevice.
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        * Get capabilities of this logical device
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        * @since 2.8
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        * @param TDes8& aDes a reference which contains return  
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        * information describing the capabilities of this device.
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        * @return void
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        */
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        IMPORT_C virtual void GetCaps( TDes8& aDes ) const;
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    public: // New functions
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        /**
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        * Complete the initialization of driver
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        * @since 2.8
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        * @return void 
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        */
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        void Initialize();
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        /**
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        * Get message block from buffers allocated in IscDataTransmissionBase.dll
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        * @since 2.8
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        * @param TDes8*& aPtr pointer where message block is set
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        * @param TUint16 aSize size of needed memory block
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        * @return void 
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        */
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        IMPORT_C void ReserveMemoryBlock( TDes8*& aPtr, TUint16 aSize );
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        /**
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        * Release memory block allocated with ReserveMemoryBlock
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        * @since 2.8
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        * @param TDes8* aData
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        * @return void 
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        */
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        IMPORT_C void ReleaseMemoryBlock( TDes8* aData );
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   117
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        /**
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        * Connection status change function. Can be called from any context.
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        * @since 2.8
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        * @param const TInt aStatus status of driver
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        * @return void 
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        */
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        EXPORT_C void NotifyConnectionStatus( const TInt aStatus );
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   125
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        /**
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        * Frames coming from Domestic OS
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        * @since 2.8
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        * @param TDesC8* aData pointer to data
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        * @return void 
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        */
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        IMPORT_C void Receive( TDesC8* aData ) const;
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   133
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        /**
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        * Queue frames that will be sent to Domestic OS
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        * @since 2.8
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        * @param aChannelId number of sender channel
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        * @param const TDesC8* aFrame pointer to send frame
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        * @param aChannelPtr DIscChannel pointer
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        * @param aMultiplexerDfc dfc to run by data transmission driver after frame has delivered
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        * @param aMultiplexerErrorCode status how frame transmission succeeded
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        * @return TInt KErrNone if frame added to send queue succesfully
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        */
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        IMPORT_C TInt QueueFrame( const TUint16 aChannelId, 
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                                  const TDesC8* aFrame,
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                                  const TAny* aChannelPtr,
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                                  TAny* aFrameInfo );
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   148
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        /**
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        * Cancels sending of frames to Domestic OS of certain channel and deletes queued frames
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        * @since 2.8
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        * @param aChannelId channel number to which canceling is done
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        * @param aChannelPtr DIscChannel pointer
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        * @return TInt KErrNone when canceling is done
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        */
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        IMPORT_C TInt CancelSending( const TUint16 aChannelId,
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                                     const TAny* aChannelPtr );
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   158
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        /**
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        * Adds Dfc to empty queues. Can be called from any context.
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        * @since 2.8
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        * @return void 
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        */
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        IMPORT_C void FlushQueues();
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   165
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        /**
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        * Function to complete user side asynchronous request. Uses DIscChannel pointer
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        * @since 2.8
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        * @param aOperation operation to complete
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        * @param aCompleteStatus status of operation
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        * @param aChannelPtr pointer to a DIscChannel
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        * @return void 
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        */
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        IMPORT_C void CompleteRequest( TUint16 aOperation, 
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                                       TInt aCompleteStatus, 
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                                       const TAny* aChannelPtr );
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        /**
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        * Function to notify client about uplink flow control status
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        * @since 2.8
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        * @param  aULFlowStatus EIscFlowControlOn / EIscFlowControlOff
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        * @param aChannelId Channel to be affected by the flow control
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        * @param aChannelPtr pointer to DIscChannel
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        * @return void 
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        */
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        IMPORT_C void ULFlowControl( const TInt aULFlowStatus, 
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   187
                                     const TUint16 aChannelId,
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   188
                                     const TAny* aChannelPtr );
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   189
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        /**
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   191
        * Function to check if asycnhronous request is active
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        * @since 2.8
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        * @param  const TUint16 aReqNumber request number
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        * @param const TUint16 aChannelId channel number
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   195
        * @return TInt KRequestPending if request active, otherwise KErrNone
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        */
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        IMPORT_C TInt IsPending( const TUint16 aReqNumber, 
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                                 const TAny* aChannelPtr );
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   199
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        /**
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   201
        * Copy data from user buffer to kernel side buffer by multiplexer.
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   202
        * This method will be deprecated in the future.
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   203
        * It is preffered to use GetThreadPtr instead.         
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        * @since 2.8
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        * @param aUserBuffer pointer to source descriptor
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        * @param aKernelBuffer pointer to destination descriptor
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        * @param aChannelPtr DIscChannel pointer
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        * @param aOffset Offset of the source buffer
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        * @return KErrNone if successful
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        */
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        IMPORT_C TInt CopyFromUserBuffer( const TDesC8& aUserBuffer,
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                                          TDes8& aKernelBuffer,
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                                          const TAny* aChannelPtr,
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   214
                                          const TInt aOffset );
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   215
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        /**
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        * Copy data to user side buffer from kernel side by multiplexer.
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        * This method will be deprecated in the future.
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        * It is preffered to use GetThreadPtr instead.  
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        * @since 2.8
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   221
        * @param aUserBuffer pointer to destination descriptor
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        * @param aKernelBuffer pointer to source descriptor
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        * @param aChannelPtr DIscChannel pointer
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        * @param aOffset Offset of the destination buffer
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        * @return KErrNone if succesful
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        */
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        IMPORT_C TInt CopyToUserBuffer( TAny* aUserBuffer,
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                                        const TDesC8& aKernelBuffer,
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                                        const TAny* aChannelPtr,
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                                        const TInt aOffset );
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        /**
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        * Returns a user side thread of a given channel. 
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        * @since 3.0
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        * @param const TAny* aChannelPtr, channel pointer (DIscChannel).
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        * @return DThread*, user side clients thread. Ownership is not given.
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        */
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        IMPORT_C DThread* GetThreadPtr( const TAny* aChannelPtr );                                        
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        /**
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        * Notify multiplexer about down link flow control
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        * @since 2.8
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        * @param  const TInt aDLFlowStatus EIscFlowControlOn / EIscFlowControlOff
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        * @param const TUint16 aChannel channel number
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        * @return void 
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        */
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        void DLFlowControlNotify( const TInt aDLFlowStatus, 
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                                  const TUint16 aChannel,
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                                  const TAny* aChannelPtr );
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        /**
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        * Function to tell current status of connection to Domestic OS
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        * @since 2.8
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        * @return TInt EIscConnectionOk / EIscConnectionNotOk
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        */
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        TInt ConnectionStatus();
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    protected:
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        /**
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        * Function to disable interrupts
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        * @since 2.8
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        * @return TInt KErrNone if succesful
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        */
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        static TInt DisableIrqs();
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        /**
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        * Function to restore interrupts
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        * @since 2.8
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        * @param TInt aLevel level where interrupts should be restored
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        * @return void 
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        */
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        static void RestoreIrqs( TInt aLevel );
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    private:
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        /**
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        * Function to connect to DataTransmission and Multiplexer ldds
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        * @since 2.8
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        * @return TInt KErrNone if succesful
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        */
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        TInt InitializeLdd2LddInterface();
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        /**
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        * Dfc to empty control channel and other send queues
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        * @since 2.8
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        * @param TAny* aPtr pointer to DIscDevice
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        * @return static void
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        */
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        static void Flush( TAny* aPtr );
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        /**
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        * Notifies connection changes.
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        * @since 2.8
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        * @param TAny* aPtr
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        * @return static void
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        */
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        static void NotifyConnection( TAny* aPtr );
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    public:     // Data
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        static DIscMultiplexerBase* iIscMultiplexerInterface;
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        static DIscDataTransmissionBase* iIscDataTransmissionInterface;
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    private:    // Data
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        TUint32**               iSend;
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        TUint32**               iTempSend;
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        TUint32**               iControlSend;        
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        TIscSendFrameInfo**     iSendFrameParameters;
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        TIscSendFrameInfo**     iTempFrameParameters;
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        TIscSendFrameInfo**     iControlFrameParameters;
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        static DIscSendQueue*   iSendQueue;
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        static DIscSendQueue*   iTempQueue;
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        static DIscSendQueue*   iControlSendQueue;
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        static TDfc*            iSendDfc;
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        static TDfc*            iNotifyDfc;
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        DIscMainRcvBuffer*      iIscMainRcvBuffer;
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        static TInt             iConnectionStatus;
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    };
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#endif      // ISCDEVICE_H
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// End of File