usbclasses/usbphoneasmodem/classcontroller/src/usbmscfileclasscontroller.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 27 Apr 2010 17:41:29 +0300
branchRCL_3
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permissions -rw-r--r--
Revision: 201015 Kit: 201017
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// Copyright (c) 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: Adheres to the UsbMan USB Class Controller API and talks to mass storage file server
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// 
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// 
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#include <barsc.h> 
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#include <barsread.h>
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#include <usb_std.h>
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#include <cusbclasscontrollerplugin.h>
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#include <centralrepository.h>
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#include <usbms.rsg>
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#include <data_caging_path_literals.hrh> 
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#include "usbmscfileclasscontroller.h"
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#include "usbmscfile.h"
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#include "usbmscfileclasscontroller_crkeys.h"
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#include "debug.h"
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// Panic category 
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#ifdef _DEBUG
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_LIT( KMsCcPanicCategory, "UsbMscFileCc" );
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#endif
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_LIT( KUsbMsResource, "\\private\\101fe1db\\usbms.rsc" );
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/**
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 Panic codes for the USB MSC File Class Controller.
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 */
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enum TMscFileCcPanic
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	{
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	//Class called while in an illegal state
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	EBadApiCall = 0,
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    EUnusedFunction = 1,
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	};
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static TInt CreateServerProcess()
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    {
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    TRACE_FUNC
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    RProcess server;
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    TInt result = server.Create( KMscFileServerFileName, KNullDesC );
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    if ( result != KErrNone )
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        {
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        return  result;
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        }
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    TRequestStatus stat;
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    server.Rendezvous( stat );
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    if ( stat != KRequestPending )
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        {
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        server.Kill( 0 ); // abort startup
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        }    
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    else
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        {
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        server.Resume(); // logon OK - start the server
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        server.SetPriority( EPriorityForeground );
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        }
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    User::WaitForRequest( stat ); // wait for start or death
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    // we can't use the 'exit reason' if the server panicked as this
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    // is the panic 'reason' and may be '0' which cannot be distinguished
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    // from KErrNone
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    result = ( server.ExitType() == EExitPanic ) ? KErrGeneral : stat.Int();    
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    server.Close();
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    return result;
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    }
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/**
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 Start MSC File Server
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 */
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static TInt StartServer()
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    {
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    TInt result;
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    TFindServer findMscFileServer( KMscFileServerName );
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    TFullName name;
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    result = findMscFileServer.Next( name );
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    if ( result != KErrNone )
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        {       
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        result = CreateServerProcess();     
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        }
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    TRACE_INFO(( _L( "Server process created: %d" ), result ))
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    return result;
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    }
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/**
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 Constructs a CUsbMscFileClassController object
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 @param	aOwner	USB Device that owns and manages the class
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 @return	A new CUsbMscFileClassController object
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 */
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CUsbMscFileClassController* CUsbMscFileClassController::NewL(
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	MUsbClassControllerNotify& aOwner)
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	{
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	TRACE_FUNC
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	CUsbMscFileClassController* r = new (ELeave) CUsbMscFileClassController(aOwner);
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	CleanupStack::PushL(r);
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	r->ConstructL();
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	CleanupStack::Pop();
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	return r;
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	}
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   119
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/**
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 Destructor
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 */
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CUsbMscFileClassController::~CUsbMscFileClassController()
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	{
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	Cancel();
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	}
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/**
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 Constructor.
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 @param	aOwner	USB Device that owns and manages the class
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 */
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CUsbMscFileClassController::CUsbMscFileClassController(
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	MUsbClassControllerNotify& aOwner )
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	: CUsbClassControllerPlugIn( aOwner, KMsStartupPriority )	
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	{
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	// Intentionally left blank
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	}
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/**
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 2nd Phase Construction.
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 */
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void CUsbMscFileClassController::ConstructL()
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	{
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	TRACE_FUNC
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	ReadMassStorageConfigL();
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	}
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/**
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 Called by UsbMan when it wants to start the mass storage class. 
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 @param aStatus The caller's request status, filled in with an error code
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 */
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void CUsbMscFileClassController::Start( TRequestStatus& aStatus )
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	{
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	TRACE_FUNC_ENTRY
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	// The service state should always be idle when this function is called 
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	// (guaranteed by CUsbSession).
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	__ASSERT_DEBUG( iState == EUsbServiceIdle, 
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	        User::Panic( KMsCcPanicCategory, EBadApiCall ) );
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	TRequestStatus* reportStatus = &aStatus;
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	iState = EUsbServiceStarting;
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    TInt ret = StartServer();
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    if ( ret != KErrNone )
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        {
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		iState = EUsbServiceIdle;
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		User::RequestComplete( reportStatus, ret );
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        TRACE_ERROR(( _L( "Error %d Can't start server." ), ret ))
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        return;
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        }
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    TRAP( ret, SetupUnitsL() );
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    if (ret != KErrNone)
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        {
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		iState = EUsbServiceIdle;
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		User::RequestComplete( reportStatus, ret );
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        TRACE_ERROR(( _L( "Error %d in SetupUnitsL." ), ret ))
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        return;
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        }
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   186
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	// Connect to USB Mass Storage server
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	ret = iMscFile.Connect();
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	if ( ret != KErrNone )
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		{
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		iState = EUsbServiceIdle;
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		User::RequestComplete( reportStatus, ret );
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		TRACE_ERROR(( _L( "Error %d connecting to msc file server" ), ret ))
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		return;
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		}
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	// StartL mass storage device
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	ret = iMscFile.Start( iMsConfig );
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   200
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	if (ret != KErrNone)
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		{
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		iState = EUsbServiceIdle;
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		User::RequestComplete( reportStatus, ret );
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		TRACE_ERROR(( _L( "Error %d starting msc file server" ), ret ))
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		return;
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		}
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	iState = EUsbServiceStarted;
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   210
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	User::RequestComplete(reportStatus, KErrNone);
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	TRACE_FUNC_EXIT
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	}
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/**
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 Called by UsbMan when it wants to stop the USB ACM class.
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   217
 
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 @param aStatus KErrNone on success or a system wide error code
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 */
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void CUsbMscFileClassController::Stop( TRequestStatus& aStatus )
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	{
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	TRACE_FUNC_ENTRY
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	// The service state should always be started when this function is called
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	// (guaranteed by CUsbSession)
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	__ASSERT_DEBUG( iState == EUsbServiceStarted, 
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	                User::Panic( KMsCcPanicCategory, EBadApiCall ) );
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	TRequestStatus* reportStatus = &aStatus;
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	TInt ret = iMscFile.Stop();
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	if ( ret != KErrNone )
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		{
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		iState = EUsbServiceStarted;
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   236
		User::RequestComplete( reportStatus, ret );
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		TRACE_ERROR(( _L( "Error %d stopping msc file server" ), ret ))
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		return;
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		}	
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   240
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	ret = iMscFile.Shutdown();
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   242
	if ( ret != KErrNone )
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		{
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   244
		User::RequestComplete( reportStatus, ret );
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		TRACE_ERROR(( _L( "Error %d stopping msc file server" ), ret ))
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		}	
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  else
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	  {
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   249
		User::RequestComplete( reportStatus, KErrNone );
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	  }    
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	iMscFile.Close();
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   252
	
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	iState = EUsbServiceIdle;
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	TRACE_FUNC_EXIT
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	}
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   256
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   257
/**
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 Gets information about the descriptor which this class provides. Never called
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 by usbMan.
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 @param aDescriptorInfo Descriptor info structure filled in by this function
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 */
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   263
void CUsbMscFileClassController::GetDescriptorInfo(TUsbDescriptor& /*aDescriptorInfo*/) const
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	{
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   265
	__ASSERT_DEBUG( EFalse, User::Panic(KMsCcPanicCategory, EUnusedFunction));
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   266
	}
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   267
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   268
/**
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 Standard active object RunL. Never called because this class has no
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 asynchronous requests.
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 */
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void CUsbMscFileClassController::RunL()
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	{
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	__ASSERT_DEBUG( EFalse, User::Panic(KMsCcPanicCategory, EUnusedFunction) );
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	}
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   276
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   277
/**
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   278
 Standard active object cancellation function. Never called because this
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 class has no asynchronous requests.
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 */
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void CUsbMscFileClassController::DoCancel()
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	{
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	__ASSERT_DEBUG( EFalse, User::Panic(KMsCcPanicCategory, EUnusedFunction) );
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	}
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   285
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   286
/**
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   287
 Standard active object error function. Never called because this class has
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 no asynchronous requests, and hence its RunL is never called.
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   289
 
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   290
 @param aError The error code (unused)
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 @return Always KErrNone to avoid an active scheduler panic
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   292
 */
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   293
TInt CUsbMscFileClassController::RunError(TInt /*aError*/)
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   294
	{
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   295
	__ASSERT_DEBUG( EFalse, User::Panic(KMsCcPanicCategory, EUnusedFunction) );
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   296
	return KErrNone;
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   297
	}
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   298
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   299
/**
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   300
 Read mass storage configuration info from the resource file
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   301
 */
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   302
void CUsbMscFileClassController::ReadMassStorageConfigL()
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   303
	{
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   304
	TRACE_FUNC_ENTRY
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diff changeset
   305
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   306
	// Try to connect to file server
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   307
	RFs fs;
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   308
	LEAVE_IF_ERROR( fs.Connect() );
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   309
	CleanupClosePushL( fs );
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diff changeset
   310
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   311
    TFileName fileName;
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    const TDriveNumber KResourceDrive = EDriveZ;
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   313
    TDriveUnit driveUnit( KResourceDrive );
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   314
    TDriveName drive = driveUnit.Name();
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   315
    fileName.Insert( 0, drive );
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diff changeset
   316
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   317
    fileName += KUsbMsResource;
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diff changeset
   318
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   319
	RResourceFile resource;
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   320
	TRAPD( err, resource.OpenL( fs, fileName ) );
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parents:
diff changeset
   321
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   322
	if ( err != KErrNone )
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   323
		{
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   324
		TRACE_ERROR(( _L( "Error %d opening resource file" ), err ))
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   325
		CleanupStack::PopAndDestroy( &fs );
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   326
		return;
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   327
		}
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parents:
diff changeset
   328
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   329
	CleanupClosePushL( resource );
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diff changeset
   330
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diff changeset
   331
	resource.ConfirmSignatureL( KUsbMsResourceVersion );
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parents:
diff changeset
   332
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   333
	HBufC8* msConfigBuf = 0;
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diff changeset
   334
	TRAPD( ret, msConfigBuf = resource.AllocReadL( USBMS_CONFIG ) );
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   335
	if ( ret != KErrNone )
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   336
		{
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diff changeset
   337
		TRACE_ERROR(( _L( "Error %d opening mass storage config" ), ret ))
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parents:
diff changeset
   338
		CleanupStack::PopAndDestroy(2, &fs); 
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diff changeset
   339
		return;
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diff changeset
   340
		}
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diff changeset
   341
	CleanupStack::PushL( msConfigBuf );
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parents:
diff changeset
   342
	
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parents:
diff changeset
   343
	// The format of the USB resource structure is:
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diff changeset
   344
	
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   345
	/* 	
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   346
	 * 	STRUCT USBMASSSTORAGE_CONFIG
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   347
	 *	{
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   348
	 *	LTEXT	vendorId;           // no more than 8 characters
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diff changeset
   349
	 *	LTEXT	productId;          // no more than 16 characters
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   350
	 *	LTEXT	productRev;        	// no more than 4 characters
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   351
	 *	};
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   352
	 */
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diff changeset
   353
	 
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   354
	// Note that the resource must be read in this order!
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diff changeset
   355
	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   356
	TResourceReader reader;
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diff changeset
   357
	reader.SetBuffer( msConfigBuf );
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diff changeset
   358
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   359
	TPtrC	vendorId		= reader.ReadTPtrC();
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   360
	TPtrC	productId		= reader.ReadTPtrC();
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   361
	TPtrC	productRev		= reader.ReadTPtrC();
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   362
	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   363
	// populate iMsConfig, truncate if exceeding limit
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   364
	ConfigItem( vendorId, iMsConfig.iVendorId, 8 );
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   365
	ConfigItem( productId, iMsConfig.iProductId, 16 );
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   366
	ConfigItem( productRev, iMsConfig.iProductRev, 4 );
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diff changeset
   367
	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   368
	// Debugging
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   369
	TRACE_INFO(( _L( "vendorId = %s" ),   &vendorId ))
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   370
	TRACE_INFO(( _L( "productId = %s" ),  &productId ))
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   371
	TRACE_INFO(( _L( "productRev = %s" ), &productRev ))
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   372
		
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   373
	CleanupStack::PopAndDestroy( 3, &fs ); // msConfigBuf, resource, fs
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   374
	TRACE_FUNC_EXIT
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   375
	}
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parents:
diff changeset
   376
	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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   377
/**
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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   378
 Utility. Copies the data from TPtr to TBuf and checks data length 
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   379
 to make sure the source does not exceed the capacity of the target
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   380
 */
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   381
 void CUsbMscFileClassController::ConfigItem( const TPtrC& source, 
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   382
                                              TDes& target, 
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   383
                                              TInt maxLength )
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   384
 	{
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   385
 	if ( source.Length() < maxLength )
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   386
 		{
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parents:
diff changeset
   387
 		maxLength = source.Length();
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diff changeset
   388
 		}
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   389
 		
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   390
 	target.Copy( source.Ptr(), maxLength );	 	
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diff changeset
   391
 	}
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parents:
diff changeset
   392
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   393
void CUsbMscFileClassController::SetupUnitsL()
1e05558e2206 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   394
    {
1e05558e2206 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   395
    RFs fs;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   396
    RUsbMscFile mscFile;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   397
    
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff changeset
   398
    LEAVE_IF_ERROR( mscFile.Connect() );
1e05558e2206 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   399
    CleanupClosePushL( mscFile );
10
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   400
    CRepository* repository = CRepository::NewLC(KCRUidUsbPhoneAsModemMscFileClassController);
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   401
    
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   402
	RArray<TUint32> lunKeys;
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   403
	CleanupClosePushL(lunKeys);
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   404
	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   405
	repository->FindL(KCRMscFileLogicalUnitNumberColumn, KCRMscFileColumnMask, lunKeys);
0
1e05558e2206 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   406
10
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   407
	
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   408
	TInt count = lunKeys.Count();
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   409
	for (TInt i=0; i<count; i++)
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   410
		{
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   411
		TUint32 lunKey = lunKeys[i];
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   412
		TUint32 fullNameKey = ((lunKey&KCRMscFileRowMask)|KCRMscFileImageFullNameColumn);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   413
		TRACE_INFO( (_L( "lunKey=%d,fullNameKey=%d" ), lunKey, fullNameKey) )
0
1e05558e2206 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   414
10
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   415
		TInt lun = 0;
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   416
		LEAVE_IF_ERROR(repository->Get(lunKey, lun));
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   417
		
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   418
		TFileName fullName;
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   419
		LEAVE_IF_ERROR(repository->Get(fullNameKey, fullName));	
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   420
		
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   421
		TRACE_INFO( (_L("lun=%d, fullName=%S"), lun, &fullName) );
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   422
	
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   423
		TInt protocol = 0; // It is not used. Bulk Transport(0x50), SCSI transparent command Set(0x06), PDT CD/DVD device(0x05) is supported only.
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   424
		
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   425
		LEAVE_IF_ERROR(mscFile.SetupLogicalUnit( fullName, protocol, lun ));
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   426
		}
f6533aee8b2b Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 3
diff changeset
   427
    CleanupStack::PopAndDestroy( 3 ); // mscFile, repository, lunKeys
0
1e05558e2206 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   428
    }