author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:35:00 +0100 | |
branch | RCL_3 |
changeset 16 | 012cc2ee6408 |
parent 15 | f92a4f87e424 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997-2009 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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|
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#include <e32std.h> |
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#include <d32usbc.h> |
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#include "ActiveWriter.h" |
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#include "AcmConstants.h" |
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#include "AcmPanic.h" |
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#include "WriteObserver.h" |
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#include "AcmUtils.h" |
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#include <usb/usblogger.h> |
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#ifdef __FLOG_ACTIVE |
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_LIT8(KLogComponent, "ECACM"); |
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#endif |
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|
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CActiveWriter::CActiveWriter(MWriteObserver& aParent, RDevUsbcClient& aLdd, TEndpointNumber aEndpoint) |
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: CActive(KEcacmAOPriority), |
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iParent(aParent), |
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iLdd(aLdd), |
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iEndpoint(aEndpoint), |
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iFirstPortion(NULL, 0), |
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iSecondPortion(NULL, 0) |
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/** |
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* Constructor. |
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* |
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* @param aParent The object that will be notified when write requests |
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* complete. |
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* @param aLdd The LDD handle to be used for posting write requests. |
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* @param aEndpoint The endpoint to write to. |
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*/ |
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{ |
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CActiveScheduler::Add(this); |
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} |
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|
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CActiveWriter::~CActiveWriter() |
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/** |
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* Destructor. |
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*/ |
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{ |
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LOG_FUNC |
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Cancel(); |
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} |
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CActiveWriter* CActiveWriter::NewL(MWriteObserver& aParent, |
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RDevUsbcClient& aLdd, |
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TEndpointNumber aEndpoint) |
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/** |
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* Standard two phase constructor. |
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* |
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* @param aParent The object that will be notified when write requests |
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* complete. |
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* @param aLdd The LDD handle to be used for posting write requests. |
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* @param aEndpoint The endpoint to write to. |
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* @return Ownership of a new CActiveWriter object. |
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*/ |
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{ |
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LOG_STATIC_FUNC_ENTRY |
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CActiveWriter* self = new(ELeave) CActiveWriter(aParent, aLdd, aEndpoint); |
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return self; |
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} |
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void CActiveWriter::Write(const TDesC8& aDes, |
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TInt aLen, |
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TBool aZlp) |
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/** |
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* Write the given data to the LDD. |
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* |
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* @param aDes A descriptor to write. |
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* @param aLen The length to write. |
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* @param aZlp Whether ZLP termination may be required. |
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*/ |
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{ |
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LOGTEXT(_L8(">>CActiveWriter::Write")); |
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if ( aZlp ) |
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{ |
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// the driver can be relied on to correctly handle appended ZLPs |
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// so use them when necessary.. |
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iLdd.Write(iStatus, iEndpoint, aDes, aLen, ETrue); |
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iWritingState = ECompleteMessage; |
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} |
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else |
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{ |
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// do we need to send this descriptor in two portions to |
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// avoid finishing the last packet on a 64 byte boundary ( avoiding |
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// expectations of a ZLP by drivers that would handle them ) ? |
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|
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// If the write request is for zero bytes a 'split' would be erroneous. |
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TBool full64BytePacket = ( aLen % KMaxPacketSize ) ? EFalse : ETrue; |
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|
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if ( full64BytePacket == EFalse || aLen == 0 ) |
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{ |
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iLdd.Write(iStatus, iEndpoint, aDes, aLen, EFalse); |
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iWritingState = ECompleteMessage; |
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LOGTEXT2(_L8("CActiveWriter::Writing %d bytes"), aLen); |
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} |
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else |
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{ |
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// we do need to split the descriptor, sending aLen-1 bytes now |
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// and sending a second portion with the remaining 1 byte later |
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iFirstPortion.Set(aDes.Left(aLen-1)); |
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119 |
|
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// Use of Left here ensures that if we've been passed a descriptor |
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// longer than aLen (doesn't *currently* happen), we don't corrupt |
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// data. |
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iSecondPortion.Set(aDes.Left(aLen).Right(1)); |
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124 |
|
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iLdd.Write(iStatus, iEndpoint, iFirstPortion, aLen-1, EFalse); |
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126 |
|
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iWritingState = EFirstMessagePart; |
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LOGTEXT3(_L8("CActiveWriter::Writing %d bytes of the %d"), aLen-1, aLen); |
0
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} |
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} |
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SetActive(); |
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|
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LOGTEXT(_L8("<<CActiveWriter::Write")); |
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} |
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|
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void CActiveWriter::DoCancel() |
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/** |
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* Cancel an outstanding write. |
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*/ |
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{ |
16 | 141 |
LOG_FUNC |
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||
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iLdd.WriteCancel(iEndpoint); |
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} |
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|
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void CActiveWriter::RunL() |
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/** |
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* This function will be called when the write completes. It notifies the |
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* parent class of the completion. |
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*/ |
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{ |
16 | 152 |
LOG_LINE |
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LOGTEXT2(_L8(">>CActiveWriter::RunL iStatus=%d"), iStatus.Int()); |
|
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|
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if ( iWritingState == EFirstMessagePart ) |
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{ |
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if ( iStatus.Int() == KErrNone ) |
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{ |
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// now send the second part.. |
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iLdd.Write(iStatus, iEndpoint, iSecondPortion, iSecondPortion.Length(), EFalse); |
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iWritingState = EFinalMessagePart; |
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LOGTEXT(_L8("CActiveWriter::Writing 1 byte to complete original nx64 byte message")); |
163 |
||
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SetActive(); |
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} |
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else |
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{ |
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// the writing of the first part failed |
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iParent.WriteCompleted(iStatus.Int()); |
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} |
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} |
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else |
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{ |
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// iWritingState == ECompleteMessage or EFinalMessagePart |
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iParent.WriteCompleted(iStatus.Int()); |
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} |
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|
16 | 178 |
LOGTEXT(_L8("<<CActiveWriter::RunL")); |
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} |
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|
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// |
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// End of file |