author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 17:01:47 +0300 | |
branch | RCL_3 |
changeset 15 | f92a4f87e424 |
parent 0 | c9bc50fca66e |
child 16 | 012cc2ee6408 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997-2010 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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* Implements part of UsbMan USB Class Framework. |
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* |
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*/ |
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|
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/** |
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@file |
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*/ |
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#include <usb_std.h> |
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#include <cusbclasscontrolleriterator.h> |
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#include <musbclasscontrollernotify.h> |
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#include "CUsbWHCMClassController.h" |
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#include "OstTraceDefinitions.h" |
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#ifdef OST_TRACE_COMPILER_IN_USE |
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#include "CUsbWHCMClassControllerTraces.h" |
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#endif |
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_LIT(KUsbLDDName, "eusbc"); |
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_LIT( KWhcmCcPanicCategory, "UsbWhcmCc" ); |
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/** |
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* Panic codes for the USB WHCM Class Controller. |
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*/ |
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enum TWhcmCcPanic |
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{ |
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/** Start() called while in an illegal state */ |
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EBadApiCallStart = 0, |
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/** Asynchronous function called (not needed, as all requests complete synchronously) */ |
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EUnusedFunction = 1, |
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/** Stop() called while in an illegal state */ |
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EBadApiCallStop = 2 |
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}; |
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/** |
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* Constructs a CUsbWHCMClassController object. |
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* |
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* @param aOwner USB Device that owns and manages the class |
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* @return A new CUsbWHCMClassController object |
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*/ |
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CUsbWHCMClassController* CUsbWHCMClassController::NewL( |
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MUsbClassControllerNotify& aOwner) |
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{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_NEWL_ENTRY ); |
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CUsbWHCMClassController* self = |
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new (ELeave) CUsbWHCMClassController(aOwner); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CleanupStack::Pop(); |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_NEWL_EXIT ); |
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return self; |
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} |
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/** |
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* Constructor. |
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* |
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* @param aOwner USB Device that owns and manages the class |
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*/ |
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CUsbWHCMClassController::CUsbWHCMClassController( |
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MUsbClassControllerNotify& aOwner) |
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: CUsbClassControllerPlugIn(aOwner, KWHCMPriority) |
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{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_CUSBWHCMCLASSCONTROLLER_CONS_ENTRY ); |
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iState = EUsbServiceIdle; |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_CUSBWHCMCLASSCONTROLLER_CONS_EXIT ); |
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} |
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/** |
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* Method to perform second phase construction. |
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*/ |
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void CUsbWHCMClassController::ConstructL() |
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{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_CONSTRUCTL_ENTRY ); |
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// Load the device driver |
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TInt err = User::LoadLogicalDevice(KUsbLDDName); |
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if (err != KErrNone && err != KErrAlreadyExists) |
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{ |
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OstTrace1( TRACE_NORMAL, CUSBWHCMCLASSCONTROLLER_CONSTRUCTL, |
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"CUsbWHCMClassController::ConstructL;err=%d", err ); |
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User::Leave(err); |
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} |
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err = iLdd.Open(0); |
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if (err < 0) |
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{ |
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OstTrace1( TRACE_NORMAL, CUSBWHCMCLASSCONTROLLER_CONSTRUCTL_DUP1, |
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"CUsbWHCMClassController::ConstructL;err=%d", err ); |
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User::Leave(err); |
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} |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_CONSTRUCTL_EXIT ); |
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} |
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108 |
|
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/** |
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* Destructor. |
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*/ |
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CUsbWHCMClassController::~CUsbWHCMClassController() |
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113 |
{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_CUSBWHCMCLASSCONTROLLER_DES_ENTRY ); |
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Cancel(); |
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if (iState == EUsbServiceStarted) |
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{ |
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// Must release all interfaces before closing the LDD to avoid a crash. |
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iLdd.ReleaseInterface(0); |
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} |
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iLdd.Close(); |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_CUSBWHCMCLASSCONTROLLER_DES_EXIT ); |
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} |
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124 |
|
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/** |
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* Called by UsbMan to start this class. |
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* |
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* @param aStatus Will be completed with success or failure. |
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*/ |
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void CUsbWHCMClassController::Start(TRequestStatus& aStatus) |
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{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_START_ENTRY ); |
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133 |
|
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//Start() should never be called if started, starting or stopping (or in state EUsbServiceFatalError) |
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if (iState != EUsbServiceIdle) |
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136 |
{ |
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OstTrace1( TRACE_FATAL, CUSBWHCMCLASSCONTROLLER_START, "CUsbWHCMClassController::Start;iState=%d", (TInt)iState ); |
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__ASSERT_DEBUG( EFalse, User::Panic(KWhcmCcPanicCategory, EBadApiCallStart) ); |
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} |
0
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140 |
|
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TRequestStatus* reportStatus = &aStatus; |
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142 |
|
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iState = EUsbServiceStarting; |
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TRAPD(err, SetUpWHCMDescriptorL()); |
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if (err != KErrNone) |
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146 |
{ |
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iState = EUsbServiceIdle; |
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User::RequestComplete(reportStatus, err); |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_START_EXIT ); |
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return; |
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151 |
} |
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iState = EUsbServiceStarted; |
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User::RequestComplete(reportStatus, KErrNone); |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_START_EXIT_DUP1 ); |
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} |
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156 |
|
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157 |
/** |
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* Called by UsbMan to stop this class. |
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* |
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* @param aStatus Will be completed with success or failure. |
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*/ |
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void CUsbWHCMClassController::Stop(TRequestStatus& aStatus) |
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163 |
{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_STOP_ENTRY ); |
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165 |
|
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//Stop() should never be called if stopping, idle or starting (or in state EUsbServiceFatalError) |
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if (iState != EUsbServiceStarted) |
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168 |
{ |
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OstTrace1( TRACE_FATAL, CUSBWHCMCLASSCONTROLLER_STOP, "CUsbWHCMClassController::Stop;iState=%d", (TInt)iState ); |
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__ASSERT_DEBUG( EFalse, User::Panic(KWhcmCcPanicCategory, EBadApiCallStart) ); |
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} |
0
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172 |
|
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TRequestStatus* reportStatus = &aStatus; |
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174 |
|
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// Must release all interfaces before closing the LDD to avoid a crash. |
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iLdd.ReleaseInterface(0); |
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177 |
|
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iState = EUsbServiceIdle; |
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179 |
|
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aStatus = KRequestPending; |
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181 |
|
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User::RequestComplete(reportStatus, KErrNone); |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_STOP_EXIT ); |
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} |
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185 |
|
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186 |
/** |
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* Returns information about the interfaces supported by this class. |
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* |
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* @param aDescriptorInfo Will be filled in with interface information. |
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*/ |
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void CUsbWHCMClassController::GetDescriptorInfo( |
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TUsbDescriptor& /*aDescriptorInfo*/) const |
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{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_GETDESCRIPTORINFO_ENTRY ); |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_GETDESCRIPTORINFO_EXIT ); |
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} |
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197 |
|
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198 |
/** |
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* Standard active object RunL. |
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*/ |
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void CUsbWHCMClassController::RunL() |
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{ |
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// This function should never be called. |
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OstTrace0( TRACE_FATAL, CUSBWHCMCLASSCONTROLLER_RUNL, "CUsbWHCMClassController::RunL;EUnusedFunction"); |
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User::Panic(KWhcmCcPanicCategory, EUnusedFunction); |
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} |
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|
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/** |
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* Standard active object cancellation function. Will only be called when an |
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* asynchronous request is currently active. |
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*/ |
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void CUsbWHCMClassController::DoCancel() |
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{ |
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// This function should never be called. |
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OstTrace0( TRACE_FATAL, CUSBWHCMCLASSCONTROLLER_DOCANCEL, "CUsbWHCMClassController::DoCancel;EUnusedFunction"); |
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User::Panic(KWhcmCcPanicCategory, EUnusedFunction); |
0
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} |
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|
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/** |
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* Standard active object error-handling function. Should return KErrNone to |
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* avoid an active scheduler panic. |
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*/ |
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TInt CUsbWHCMClassController::RunError(TInt /*aError*/) |
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{ |
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// This function should never be called. |
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OstTrace0( TRACE_FATAL, CUSBWHCMCLASSCONTROLLER_RUNERROR, "CUsbWHCMClassController::RunError;EUnusedFunction"); |
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User::Panic(KWhcmCcPanicCategory, EUnusedFunction); |
0
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return KErrNone; |
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} |
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|
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|
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void CUsbWHCMClassController::SetUpWHCMDescriptorL() |
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/** |
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* Setup the WHCM Class Descriptors. |
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*/ |
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{ |
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OstTraceFunctionEntry0( CUSBWHCMCLASSCONTROLLER_SETUPWHCMDESCROPTORL_ENTRY ); |
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|
0
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// Set up and register the WHCM interface descriptor |
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|
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TUsbcInterfaceInfoBuf ifc; |
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ifc().iString = NULL; |
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ifc().iClass.iClassNum = 0x02; |
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ifc().iClass.iSubClassNum = KWHCMSubClass; |
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ifc().iClass.iProtocolNum = KWHCMProtocol; |
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ifc().iTotalEndpointsUsed = 0; |
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|
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// Indicate that this interface does not expect any control transfers |
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// from EP0. |
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ifc().iFeatureWord |= KUsbcInterfaceInfo_NoEp0RequestsPlease; |
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|
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TInt err = iLdd.SetInterface(0, ifc); |
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if (err < 0) |
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{ |
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OstTrace1( TRACE_NORMAL, CUSBWHCMCLASSCONTROLLER_SETUPWHCMDESCROPTORL, |
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"CUsbWHCMClassController::SetUpWHCMDescriptorL;err=%d", (TInt)err ); |
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User::Leave(err); |
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} |
0
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|
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// Get the interface number from the LDD for later reference |
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TBuf8<100> interface_descriptor; |
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err = iLdd.GetInterfaceDescriptor(0, interface_descriptor); |
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if (err < 0) |
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{ |
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OstTrace1( TRACE_NORMAL, CUSBWHCMCLASSCONTROLLER_SETUPWHCMDESCROPTORL_DUP1, |
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"CUsbWHCMClassController::SetUpWHCMDescriptorL;err=%d", (TInt)err ); |
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User::Leave(err); |
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} |
0
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269 |
|
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|
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TUint8 WHCM_int_no = interface_descriptor[2]; |
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|
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// Set up the class-specific interface block. |
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// This consists of: |
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// Comms Class Header Functional Desctriptor |
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// WHCM Functional Descriptor |
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// Union Functional Descriptor |
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// Most of the data is copied from the static const structure in the header file. |
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|
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TBuf8<200> desc; |
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desc.Copy(WHCMheader, sizeof(WHCMheader)); |
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|
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// Append the interface number to the Union Functional Descriptor |
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desc.Append( WHCM_int_no ); |
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|
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// In order to finish off the Union Functional Descriptor we need to fill |
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// out the Subordinate Class list. |
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// We can do this by iterating through the remaining class controllers in the |
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// owner's list to find all the the subordinate classes. |
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|
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// Two assumptions are made here: |
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// 1) That all the remaining controller in the list (after this one) |
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// are subordinate classes of this WHCM class. |
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// 2) That their interface numbers will be assigned contiguously. |
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|
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TInt if_number = WHCM_int_no + 1; // for counting interface numbers |
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TUint8 union_len = 4; // for holding the length of the union descriptor |
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|
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// Iterate through the class controllers |
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CUsbClassControllerIterator *iterator = Owner().UccnGetClassControllerIteratorL(); |
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iterator->Seek(this); |
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while( (iterator->Next() != KErrNotFound) |
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&& (iterator->Current()->StartupPriority() >= StartupPriority()) ) |
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{ |
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// Found another class in the union. Add it to our list. |
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TUsbDescriptor desc_info; |
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iterator->Current()->GetDescriptorInfo(desc_info); |
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for (TInt i=0; i<desc_info.iNumInterfaces; i++) |
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{ |
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desc.Append(if_number++); |
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union_len++; |
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} |
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} |
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delete iterator; |
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// We have added to the Union Functional Descriptor. |
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// So we need to insert the new length into it. |
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desc[10] = union_len; |
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|
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// Register the whole class-specific interface block |
15
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err = iLdd.SetCSInterfaceDescriptorBlock(0, desc); |
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if (err < 0) |
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{ |
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OstTrace1( TRACE_NORMAL, CUSBWHCMCLASSCONTROLLER_SETUPWHCMDESCROPTORL_DUP2, |
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"CUsbWHCMClassController::SetUpWHCMDescriptorL;err=%d", (TInt)err ); |
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User::Leave(err); |
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} |
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OstTraceFunctionExit0( CUSBWHCMCLASSCONTROLLER_SETUPWHCMDESCROPTORL_EXIT ); |
0
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} |