usbengines/usbdevcon/src/cep0reader.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:14:30 +0200
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permissions -rw-r--r--
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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:  EP0 Reader 
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*
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*/
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#include "cep0reader.h"
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#include "cstatemachine.h"
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#include "cusbdevcon.h"
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#include "debug.h"
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// ---------------------------------------------------------------------------
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// Two-phase construction
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// ---------------------------------------------------------------------------
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//
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CEP0Reader* CEP0Reader::NewL(CStateMachine& aObserver, RDevUsbcClient& aLdd)
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    {
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    FLOG( _L( "[USBDEVCON]\tCEP0Reader::NewL" ) );
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    CEP0Reader* self = new (ELeave) CEP0Reader(aObserver, aLdd);
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    CleanupStack::PushL(self);
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    self->ConstructL();
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    CleanupStack::Pop(self);
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    return self;    
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    }
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// ---------------------------------------------------------------------------
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// Default construction
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// ---------------------------------------------------------------------------
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//
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CEP0Reader::CEP0Reader(CStateMachine& aObserver, RDevUsbcClient& aLdd) :
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                                                            CActive(EPriorityMore),
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                                                            iLdd(aLdd),
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                                                            iObserver(aObserver)
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    {
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    CActiveScheduler::Add(this);
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    }
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// ---------------------------------------------------------------------------
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// Two-phase construction
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// ---------------------------------------------------------------------------
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//
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void CEP0Reader::ConstructL()
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    {
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    FLOG( _L( "[USBDEVCON]\tCEP0Reader::ConstructL" ) );
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    iBuffer.CreateL(0); // later will be reallocated with required size
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    }
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// ---------------------------------------------------------------------------
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// Destruction
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// ---------------------------------------------------------------------------
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//
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CEP0Reader::~CEP0Reader()
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    {
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    Cancel();
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    iBuffer.Close();
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    }   
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// ---------------------------------------------------------------------------
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// Cancellation of outstanding request
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// ---------------------------------------------------------------------------
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//
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void CEP0Reader::DoCancel()
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    {
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    iLdd.ReadCancel(EEndpoint0);
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    }
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// ----------------------------------------------------------------------------
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// Standard active object error function.
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// ----------------------------------------------------------------------------
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//
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TInt CEP0Reader::RunError( TInt /*aError*/ )
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    {
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    return KErrNone;
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    }
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// ---------------------------------------------------------------------------
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// Data has been read from EP0
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// ---------------------------------------------------------------------------
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//
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void CEP0Reader::RunL()
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    {
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    FLOG( _L( "[USBDEVCON]\tCEP0Reader::RunL Data received:" ) );
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    iObserver.ReadEP0(iBuffer, iStatus);
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    }
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// ---------------------------------------------------------------------------
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// Issue request to read setup packet
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// ---------------------------------------------------------------------------
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//
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void CEP0Reader::ReadSetupPacket()
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    {
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    FLOG( _L( "[USBDEVCON]\tCEP0Reader::ReadSetupPacket" ) );
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    if(IsActive())
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        {
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        return;
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        }
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    iBuffer.Close();
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    iBuffer.Create(KSetupPacketLength);
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    iLdd.ReadPacket(iStatus, EEndpoint0, iBuffer, KSetupPacketLength);
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    SetActive();
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    }
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// ---------------------------------------------------------------------------
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// Issue request to read data
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// ---------------------------------------------------------------------------
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//  
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void CEP0Reader::Read(TUint aDataLength)
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    {
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    FLOG( _L( "[USBDEVCON]\tCEP0Reader::Read" ) );
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    if(IsActive())
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        {
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        return;
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        }
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    iBuffer.Close();
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    iBuffer.Create(aDataLength);    
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    iLdd.Read(iStatus, EEndpoint0, iBuffer, aDataLength);
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    SetActive();
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    }
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