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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef USBHOSTCOMM_H
#define USBHOSTCOMM_H
// Based on the official usbostrouter header, modified to remove dependancy on
// the client DLL
#include <e32base.h>
typedef int TOstProtIds;
class RUsbOstComm : public RSessionBase
{
public:
RUsbOstComm();
TInt Connect();
TInt Disconnect();
TInt Open();
TInt Close();
TInt RegisterProtocolID(TOstProtIds aId, TBool aNeedHeader);
void ReadMessage(TRequestStatus& aStatus, TDes8& aDes);
TInt ReadCancel();
void WriteMessage(TRequestStatus& aStatus, const TDesC8& aDes, TBool aHasHeader=EFalse);
TVersion Version() const;
private:
enum TUsbOstCmdCode
{
EUsbOstCmdCodeFirst,
EUsbOstCmdConnect,
EUsbOstCmdDisconnect,
EUsbOstCmdCodeGetAcmConfig,
EUsbOstCmdCodeSetAcmConfig,
EUsbOstCmdCodeOpen,
EUsbOstCmdCodeClose,
EUsbOstCmdCodeRegisterId,
EUsbOstCmdCodeRegisterIds,
EUsbOstCmdCodeUnRegisterId,
EUsbOstCmdCodeUnRegisterIds,
EUsbOstCmdCodeReadMsg,
EUsbOstCmdCodeReadCancel,
EUsbOstCmdCodeWriteMsg,
EUsbOstCmdCodeWriteCancel,
EUsbOstCmdCodeLast
};
};
RUsbOstComm::RUsbOstComm()
{
}
TInt RUsbOstComm::Connect()
{
_LIT(KUsbOstServerName, "!UsbOstRouter");
_LIT(KUsbOstServerImageName, "usbostrouter");
const TUid KUsbOstServerUid = { 0x200170BE };
TInt startupAttempts = 2;
for(;;) {
TInt ret = CreateSession(KUsbOstServerName, TVersion(1,0,0));
if (ret != KErrNotFound && ret != KErrServerTerminated) {
return ret;
}
if (startupAttempts-- == 0) {
return ret;
}
RProcess server;
ret = server.Create(KUsbOstServerImageName, KNullDesC, KUsbOstServerUid);
if (ret != KErrNone)
return ret;
TRequestStatus serverDiedRequestStatus;
server.Rendezvous(serverDiedRequestStatus);
if (serverDiedRequestStatus != KRequestPending) {
// Abort startup
server.Kill(KErrNone);
} else {
// Logon OK - start the server
server.Resume();
}
User::WaitForRequest(serverDiedRequestStatus);
ret = (server.ExitType() == EExitPanic) ? KErrGeneral : serverDiedRequestStatus.Int();
server.Close();
if (ret != KErrNone && ret != KErrAlreadyExists) {
return ret;
}
}
}
TInt RUsbOstComm::Disconnect()
{
return SendReceive(EUsbOstCmdDisconnect);
}
TInt RUsbOstComm::Open()
{
return SendReceive(EUsbOstCmdCodeOpen);
}
TInt RUsbOstComm::Close()
{
TInt err = SendReceive(EUsbOstCmdCodeClose);
RHandleBase::Close();
return err;
}
TInt RUsbOstComm::RegisterProtocolID(const TOstProtIds aId, TBool aNeedHeader)
{
TIpcArgs args(aId, aNeedHeader);
return SendReceive(EUsbOstCmdCodeRegisterId, args);
}
void RUsbOstComm::ReadMessage(TRequestStatus& aStatus, TDes8& aDes)
{
TIpcArgs args(aDes.MaxLength(), &aDes);
SendReceive(EUsbOstCmdCodeReadMsg, args, aStatus);
}
TInt RUsbOstComm::ReadCancel()
{
return SendReceive(EUsbOstCmdCodeReadCancel);
}
void RUsbOstComm::WriteMessage(TRequestStatus& aStatus, const TDesC8& aDes, TBool aHasHeader)
{
TIpcArgs args(aHasHeader, aDes.Length(), &aDes);
SendReceive(EUsbOstCmdCodeWriteMsg, args, aStatus);
}
typedef TVersion (*TVersionFunction)(const RUsbOstComm*);
const TInt KVersionOrdinal = 17;
TVersion RUsbOstComm::Version() const
{
// This function has to go to the DLL, unfortunately
TVersion result; // Return 0.0.0 on any error
RLibrary lib;
TInt err = lib.Load(_L("usbostcomm"));
if (err) return result;
TLibraryFunction fn = lib.Lookup(KVersionOrdinal);
if (fn)
result = ((TVersionFunction)fn)(this);
lib.Close();
return result;
}
#endif //USBHOSTCOMM_H
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