diff -r 4bea936937d0 -r 1a2a19ee918d usbdrv/peripheral/pdd/pil/src/chapter9.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbdrv/peripheral/pdd/pil/src/chapter9.cpp	Wed Aug 18 11:34:45 2010 +0300
@@ -0,0 +1,1599 @@
+// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// e32/drivers/usbcc/chapter9.cpp
+// Platform independent layer (PIL) of the USB Device controller driver:
+// Processing of USB spec chapter 9 standard requests.
+// 
+//
+
+/**
+ @file chapter9.cpp
+ @internalTechnology
+*/
+
+#include <usb/usbc.h>
+
+#include "controltransfersm.h"
+
+//#define ENABLE_EXCESSIVE_DEBUG_OUTPUT
+//
+// === USB Controller member function implementation - PSL API (protected) ========================
+//
+
+/** Used to synchronize the Ep0 state machine between the PSL and PIL.
+    Accepts a SETUP packet and returns the next Ep0 state.
+
+    @param aSetupBuf The SETUP packet just received by the PSL.
+    @return The next Ep0 state.
+
+    @publishedPartner @released
+*/
+UsbShai::TControlStage DUsbClientController::EnquireEp0NextStage(const TUint8* aSetupBuf) const
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::EnquireEp0NextState()"));
+
+    // This function may be called by the PSL from within an ISR -- so we have
+    // to take care what we do here (and also in all functions that get called
+    // from here).
+
+    if (SWAP_BYTES_16((reinterpret_cast<const TUint16*>(aSetupBuf)[3])) == 0) // iLength
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  --> EControlTransferStageStatusIn"));
+        return UsbShai::EControlTransferStageStatusIn;                            // No-data Control => Status_IN
+        }
+    else if ((aSetupBuf[0] & KUsbRequestType_DirMask) == KUsbRequestType_DirToDev)
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  --> EControlTransferStageDataOut"));
+        return UsbShai::EControlTransferStageDataOut;                            // Control Write => Data_OUT
+        }
+    else
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  --> EControlTransferStageDataIn"));
+        return UsbShai::EControlTransferStageDataIn;                                // Control Read => Data_IN
+        }
+    }
+
+//
+// About iLastError.
+// This member is used to remember the last error happend during a
+// processXXX likewise function.
+//
+// Before entry of each ProcessXXX, iLastError will be cleared to KErrNone.
+//
+
+// --- The USB Spec Chapter 9 Standard Endpoint Zero Device Requests ---
+// Record error happend with iLastError, the value already been set to zero
+// before entering ProcessSetupPacket call.
+void DUsbClientController::ProcessGetDeviceStatus(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessGetDeviceStatus()"));
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateAddress)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        // We always assume Device is bus-powered, even though mobile phone almost always
+        // has a battry there, because self-powered device can not required more then 100ma current
+        // which is not acceptable for Usb charging.
+        TBool selfPowered = EFalse;         
+        
+        /*  FIXME: modify selfPowered to make it compilance with following rule.
+           
+             1. If current draw exceeds 100mA, the device must report itself 
+                as bus-powered during enumeration.
+             
+             2. In all cases, the GetStatus(DEVICE) call must accurately report 
+                whether the device is currently operating on self- or bus-power.
+                
+             3. A device that is actively drawing more than 100mA from USB must 
+                report itself as bus-powered in the GetStatus(DEVICE) call.
+             
+             4. Peripherals that return "Self-powered" in the GetStatus(DEVICE) 
+                call are prohibited from drawing more than 100mA at any time.
+        */
+        /*   
+        TBuf8<KUsbDescSize_Config> config;
+        
+        if(iDescriptors.GetConfigurationDescriptorTC(&Kern::CurrentThread(),config) == KErrNone)
+            {
+            TUint8 maxPower = config[8];
+            if(maxPower <= 50)
+                {
+                selfPowered = EFalse;
+                }
+            }
+        */
+        
+        const TUint16 status = ((selfPowered ? KUsbDevStat_SelfPowered : 0) |
+                        (iRmWakeupStatus_Enabled ? KUsbDevStat_RemoteWakeup : 0));
+        __KTRACE_OPT(KUSB, Kern::Printf("  Reporting device status: 0x%02x", status));
+        *reinterpret_cast<TUint16*>(iEp0_TxBuf) = SWAP_BYTES_16(status);
+        if (iConTransferMgr->SetupEndpointZeroWrite(iEp0_TxBuf, sizeof(status)) == KErrNone)
+            {
+            iEp0WritePending = ETrue;
+            }
+        else
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Wrong: Write to Ep0 Failed"));
+            }
+        }
+    }
+
+void DUsbClientController::ProcessGetInterfaceStatus(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessGetInterfaceStatus()"));
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateConfigured)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        if (InterfaceExists(aPacket.iIndex) == EFalse)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Interface does not exist"));
+            iLastError = KErrGeneral;
+            }
+        else
+            {        
+            const TUint16 status = 0x0000;                            // as of USB Spec 2.0
+            __KTRACE_OPT(KUSB, Kern::Printf("  Reporting interface status: 0x%02x", status));
+            *reinterpret_cast<TUint16*>(iEp0_TxBuf) = SWAP_BYTES_16(status);
+            if (iConTransferMgr->SetupEndpointZeroWrite(iEp0_TxBuf, sizeof(status)) == KErrNone)
+                {
+                iEp0WritePending = ETrue;
+                }
+            else
+                {
+                __KTRACE_OPT(KUSB, Kern::Printf("  Wrong: Write to Ep0 Failed"));
+                }
+            }
+        }
+    }
+
+
+void DUsbClientController::ProcessGetEndpointStatus(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessGetEndpointStatus()"));
+    if (
+        ((iDeviceState < UsbShai::EUsbPeripheralStateAddress) ||
+         (iDeviceState == UsbShai::EUsbPeripheralStateAddress && (aPacket.iIndex & KUsbEpAddress_Portmask) != 0)))
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        if (EndpointExists(aPacket.iIndex) == EFalse)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint does not exist"));
+            iLastError = KErrGeneral;
+            }
+        else
+            {
+            const TInt ep = EpAddr2Idx(aPacket.iIndex);
+            const TUint16 status = (iRealEndpoints[ep].iHalt) ?     KUsbEpStat_Halt : 0;
+            __KTRACE_OPT(KUSB, Kern::Printf("  Reporting endpoint status 0x%02x for real endpoint %d",
+                                            status, ep));
+            *reinterpret_cast<TUint16*>(iEp0_TxBuf) = SWAP_BYTES_16(status);
+            if (iConTransferMgr->SetupEndpointZeroWrite(iEp0_TxBuf, 2) == KErrNone)
+                {
+                iEp0WritePending = ETrue;
+                }
+            else
+                {
+                __KTRACE_OPT(KUSB, Kern::Printf("  Wrong: Write to Ep0 Failed"));
+                }
+            }
+        }
+    }
+
+
+void DUsbClientController::ProcessSetClearDevFeature(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSetClearDevFeature()"));
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateDefault)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        return;
+        }
+
+    TInt test_sel = 0;
+
+    if (aPacket.iRequest == KUsbRequest_SetFeature)
+        {
+        switch (aPacket.iValue)
+            {
+            case KUsbFeature_RemoteWakeup:
+                if ( iDeviceState < UsbShai::EUsbPeripheralStateAddress)
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+                    iLastError = KErrGeneral;                
+                    }
+                else
+                    {
+                    iRmWakeupStatus_Enabled = ETrue;
+                    }
+                break;
+                
+            case KUsbFeature_TestMode:
+                if (!iHighSpeed)
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Request only supported in High-Speed mode"));
+                    iLastError = KErrGeneral;
+                    }
+                else if (LowByte(aPacket.iIndex) != 0)
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Lower byte of wIndex must be zero"));
+                    iLastError = KErrGeneral;
+                    }
+                else
+                    {
+                    test_sel = HighByte(aPacket.iIndex);
+                    if ((test_sel < UsbShai::EUsbTestSelector_Test_J) || (test_sel > UsbShai::EUsbTestSelector_Test_Force_Enable))
+                        {
+                        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid test selector: %d", test_sel));
+                        iLastError = KErrGeneral;
+                        }
+                    }
+                break;
+                
+            case KUsbFeature_B_HnpEnable:
+                if (!iOtgSupport)
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Request only supported on a OTG device"));
+                    iLastError = KErrGeneral;
+                    }            
+                else if (!(iOtgFuncMap & KUsbOtgAttr_HnpSupp))
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Request only valid if OTG device supports HNP"));
+                    iLastError = KErrGeneral;
+                    }
+                else
+                    {
+                    iOtgFuncMap |= KUsbOtgAttr_B_HnpEnable;
+                    OtgFeaturesNotify();
+                    }
+                break;
+                
+            case KUsbFeature_A_HnpSupport:
+                if (!iOtgSupport)
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Request only supported on a OTG device"));
+                    iLastError = KErrGeneral;
+                    }
+                else if (!(iOtgFuncMap & KUsbOtgAttr_HnpSupp))
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Request only valid if OTG device supports HNP"));
+                    iLastError = KErrGeneral;
+                    }
+                else
+                    {
+                    iOtgFuncMap |= KUsbOtgAttr_A_HnpSupport;
+                    OtgFeaturesNotify();
+                    }
+                break;
+                
+            case KUsbFeature_A_AltHnpSupport:
+                if (!iOtgSupport)
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Request only supported on a OTG device"));
+                    iLastError = KErrGeneral;
+                    }
+                else if (!(iOtgFuncMap & KUsbOtgAttr_HnpSupp))
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Request only valid if OTG device supports HNP"));
+                    iLastError = KErrGeneral;
+                    }
+                else
+                    {
+                    iOtgFuncMap |= KUsbOtgAttr_A_AltHnpSupport;
+                    OtgFeaturesNotify();
+                    }
+                break;
+                
+            default:
+                __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Unknown feature requested"));
+                iLastError = KErrGeneral;                
+            }
+        }
+    else // KUsbRequest_ClearFeature
+        {
+        switch (aPacket.iValue)
+            {
+            case KUsbFeature_RemoteWakeup:
+                if ( iDeviceState < UsbShai::EUsbPeripheralStateAddress)
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+                    iLastError = KErrGeneral;
+                    }
+                else
+                    {
+                    iRmWakeupStatus_Enabled = EFalse;
+                    }
+                break;
+                
+            default:
+                __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Unknown feature requested"));
+                iLastError = KErrGeneral;
+            }
+        }
+    
+    if(iLastError == KErrNone)
+        {
+        // Sent out status packet if no error found.
+        iConTransferMgr->SendEp0ZeroByteStatusPacket();                            // success: zero bytes data during status stage
+        
+        // 9.4.9: "The transition to test mode of an upstream facing port must not happen until
+        // after the status stage of the request."
+        if (test_sel)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Entering HS Test Mode %d", test_sel));
+            iController.EnterTestMode((UsbShai::TUsbTestModeSelector)test_sel);
+            }
+        }
+    }
+
+
+void DUsbClientController::ProcessSetClearIfcFeature(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSetClearIfcFeature()"));
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateConfigured)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        // No interface features defined in USB spec, thus
+        iLastError = KErrGeneral;
+        }
+    }
+
+
+void DUsbClientController::ProcessSetClearEpFeature(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSetClearEpFeature()"));
+    if (
+        ((iDeviceState < UsbShai::EUsbPeripheralStateAddress) ||
+         (iDeviceState == UsbShai::EUsbPeripheralStateAddress && (aPacket.iIndex & KUsbEpAddress_Portmask) != 0)))
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else if (aPacket.iValue != KUsbFeature_EndpointHalt)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Unknown feature requested"));
+        iLastError = KErrGeneral;
+        }
+    else if (EndpointExists(aPacket.iIndex) == EFalse)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint does not exist"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        const TInt ep = EpAddr2Idx(aPacket.iIndex);
+        if (iRealEndpoints[ep].iLEndpoint->iInfo.iType == UsbShai::KUsbEpTypeControl ||
+            iRealEndpoints[ep].iLEndpoint->iInfo.iType == UsbShai::KUsbEpTypeIsochronous)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint is Control or Isochronous"));
+            iLastError = KErrGeneral;
+            }
+        else
+            {
+            SetClearHaltFeature(ep, aPacket.iRequest);
+        
+            // success: zero bytes data during status stage
+            iConTransferMgr->SendEp0ZeroByteStatusPacket();
+            }
+        }
+    }
+
+
+void DUsbClientController::ProcessSetAddress(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSetAddress()"));
+    if ( iDeviceState > UsbShai::EUsbPeripheralStateAddress)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        const TUint16 addr = aPacket.iValue;
+        
+        if (addr > 127)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Bad address value: %d (>127)", addr));
+            iLastError = KErrGeneral;
+            }
+        else if (addr == 0)
+            {
+            // Enter Default state (from Default or Address)
+            NextDeviceState(UsbShai::EUsbPeripheralStateDefault);
+            }
+        
+        __KTRACE_OPT(KUSB, Kern::Printf("  USB address: %d", addr));
+        
+        // If controller support hw acceleration,call set address first and then status
+        if(iControllerProperties.iControllerCaps & UsbShai::KDevCapSetAddressAcceleration)
+            {
+            iController.SetDeviceAddress(addr);
+            }
+
+        // The spec says, under section 9.4.6:
+        // "Stages after the initial Setup packet assume the same device address as the Setup packet. The USB
+        // device does not change its device address until after the Status stage of this request is completed
+        // successfully. Note that this is a difference between this request and all other requests. For all other
+        // requests, the operation indicated must be completed before the Status stage."
+        // Therefore, here we first send the status packet and only then actually execute the request.
+        iConTransferMgr->SendEp0ZeroByteStatusPacket();
+        
+        // If controller doesn't support hw acceleration, call set address after status
+        if((iControllerProperties.iControllerCaps & UsbShai::KDevCapSetAddressAcceleration) == 0)
+            {
+            iController.SetDeviceAddress(addr);
+            }
+        }
+    }
+
+
+void DUsbClientController::ProcessGetDescriptor(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessGetDescriptor()"));
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateDefault)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        return ;
+        }
+
+    // Make sure we assume the correct speed
+    __ASSERT_DEBUG((iHighSpeed == CurrentlyUsingHighSpeed()), Kern::Fault(KUsbPILPanicCat, __LINE__));
+
+    TInt size = 0;
+    const TInt result = iDescriptors.FindDescriptor(HighByte(aPacket.iValue), // Type
+                                                    LowByte(aPacket.iValue), // Index
+                                                    aPacket.iIndex, // Language ID
+                                                    size);
+
+    if ((result != KErrNone) || (size == 0))
+        {
+        // This doesn't have to be an error - protocol-wise it's OK.
+        __KTRACE_OPT(KUSB, Kern::Printf("  Couldn't retrieve descriptor"));
+        iLastError = KErrGeneral;
+        return;
+        }
+
+    __KTRACE_OPT(KUSB, Kern::Printf("  Descriptor found, size: %d (requested: %d)",
+                                    size, aPacket.iLength));
+    if (size > KUsbcBufSz_Ep0Tx)
+        {
+        // This should actually not be possible (i.e. we should never get here).
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Ep0_Tx buffer too small"));
+        }
+    if (size > aPacket.iLength)
+        {
+        // Send only as much data as requested by the host
+        size = aPacket.iLength;
+        }
+
+#ifdef ENABLE_EXCESSIVE_DEBUG_OUTPUT
+    __KTRACE_OPT(KUSB,
+                 Kern::Printf("  Data: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x ...",
+                              iEp0_TxBuf[0], iEp0_TxBuf[1], iEp0_TxBuf[2], iEp0_TxBuf[3],
+                              iEp0_TxBuf[4], iEp0_TxBuf[5], iEp0_TxBuf[6], iEp0_TxBuf[7]));
+#endif
+    // If we're about to send less bytes than expected by the host AND our number is a
+    // multiple of the packet size, in order to indicate the end of the control transfer,
+    // we must finally send a zero length data packet (ZLP):
+    const TBool zlp = ((size < aPacket.iLength) && (size % iEp0MaxPacketSize == 0));
+    if (iConTransferMgr->SetupEndpointZeroWrite(iEp0_TxBuf, size, zlp) == KErrNone)
+        {
+        iEp0WritePending = ETrue;
+        }
+    else
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  Wrong: Write to Ep0 Failed"));
+        }
+    }
+
+
+void DUsbClientController::ProcessSetDescriptor(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSetDescriptor()"));
+#ifndef USB_SUPPORTS_SET_DESCRIPTOR_REQUEST
+    iLastError = KErrGeneral;
+    return;
+#else
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateAddress)
+        {
+        // Error: Invalid device state!
+        iLastError = KErrGeneral;
+        }
+    else if (aPacket.iLength > KUsbcBufSz_Ep0Rx)
+        {
+        // Error: Our Rx buffer is too small! (Raise a defect to make it larger)
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Ep0_Rx buffer too small"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        SetEp0DataOutVars();
+        iConTransferMgr->SetupEndpointZeroRead();
+        }
+#endif
+    }
+
+void DUsbClientController::ProcessGetConfiguration(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessGetConfiguration()"));
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateAddress)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else if ( iDeviceState == UsbShai::EUsbPeripheralStateAddress && iCurrentConfig != 0)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: DeviceState Address && Config != 0"));
+        iLastError = KErrGeneral;
+        }
+    else if ( iDeviceState == UsbShai::EUsbPeripheralStateConfigured && iCurrentConfig == 0)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: DeviceState Configured && Config == 0"));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        if (aPacket.iLength != 1)                                // "unspecified behavior"
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Warning: wLength != 1 (= %d)", aPacket.iLength));
+            }
+        __KTRACE_OPT(KUSB, Kern::Printf("  Reporting configuration value %d", iCurrentConfig));
+        if (iConTransferMgr->SetupEndpointZeroWrite(&iCurrentConfig, sizeof(iCurrentConfig)) == KErrNone)
+            {
+            iEp0WritePending = ETrue;
+            }
+        else
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Wrong: Write to Ep0 Failed"));
+            }
+        }
+    }
+
+
+/** Changes the device's configuration value, including interface setup and/or
+    teardown and state change notification of higher-layer clients.
+    May also be called by the PSL in special cases - therefore publishedPartner.
+
+    @param aPacket The received Ep0 SET_CONFIGURATION setup request packet.
+    @return KErrGeneral in case of a protocol error, KErrNone otherwise.
+
+    @publishedPartner @released
+*/
+TInt DUsbClientController::ProcessSetConfiguration(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSetConfiguration()"));
+
+    // This function may be called by the PSL from within an ISR -- so we have
+    // to take care what we do here (and also in all functions that get called
+    // from here).
+    const TInt value = aPacket.iValue;
+    
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateAddress)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }    
+    else if (value > 1)                                            // we support only one configuration
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Configuration value too large: %d", value));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  Configuration value: %d", value));
+        ChangeConfiguration(value);
+
+        // In 9.4.5 under GET_STATUS we read, that after SET_CONFIGURATION the HALT feature
+        // for all endpoints is reset to zero.
+        TInt num = 0;
+        (TAny) DoForEveryEndpointInUse(&DUsbClientController::ClearHaltFeature, num);
+        __KTRACE_OPT(KUSB, Kern::Printf("  Called ClearHaltFeature() for %d endpoints", num));
+        // success: zero bytes data during status stage
+        iConTransferMgr->SendEp0ZeroByteStatusPacket();
+        }
+        
+    return iLastError;
+    }
+
+void DUsbClientController::ProcessGetInterface(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessGetInterface()"));
+    
+    const TInt number = aPacket.iIndex;
+    
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateConfigured)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else if (iCurrentConfig == 0)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Device not configured"));
+        iLastError = KErrGeneral;
+        }    
+    else if (!InterfaceExists(number))
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Bad interface index: %d", number));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        // Send alternate setting code of iCurrentInterface of Interface(set) <number> of the current
+        // config (iCurrentConfig).
+        const TUint8 setting = InterfaceNumber2InterfacePointer(number)->iCurrentInterface;
+        __KTRACE_OPT(KUSB, Kern::Printf("  Reporting interface setting %d", setting));
+        if (iConTransferMgr->SetupEndpointZeroWrite(&setting, 1) == KErrNone)
+            {
+            iEp0WritePending = ETrue;
+            }
+        else
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Wrong: Write to Ep0 Failed"));
+            }
+        }
+    }
+
+
+void DUsbClientController::ProcessSetInterface(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSetInterface()"));
+    
+    const TInt number = aPacket.iIndex;
+    
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateConfigured)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }
+    else if (iCurrentConfig == 0)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Device not configured"));
+        iLastError = KErrGeneral;
+        }    
+    else if (!InterfaceExists(number))
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Bad interface index: %d", number));
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        const TInt setting = aPacket.iValue;
+        TUsbcInterfaceSet* const ifcset_ptr = InterfaceNumber2InterfacePointer(number);
+        RPointerArray<TUsbcInterface>& ifcs = ifcset_ptr->iInterfaces;
+        if (setting >= ifcs.Count())
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Alt Setting >= bNumAltSettings: %d", setting));
+            iLastError = KErrGeneral;
+            }
+        else
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Interface setting:: %d", setting));
+            // Set iCurrentInterface of Interface(set) <number> of the current config
+            // (iCurrentConfig) to alternate setting <setting>.
+            ChangeInterface(ifcs[setting]);
+            // In 9.4.5 under GET_STATUS we read, that after SET_INTERFACE the HALT feature
+            // for all endpoints (of the now current interface setting) is reset to zero.
+            RPointerArray<TUsbcLogicalEndpoint>& eps = ifcset_ptr->CurrentInterface()->iEndpoints;
+            const TInt num_eps = eps.Count();
+            for (TInt i = 0; i < num_eps; i++)
+                {
+                const TInt ep_num = EpAddr2Idx(eps[i]->iPEndpoint->iEndpointAddr);
+                (TAny) ClearHaltFeature(ep_num);
+                }
+            // success: zero bytes data during status stage
+            iConTransferMgr->SendEp0ZeroByteStatusPacket();    
+            }
+        }
+    }
+
+
+void DUsbClientController::ProcessSynchFrame(const TUsbcSetup& aPacket)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProcessSynchFrame()"));
+    
+    const TInt ep = aPacket.iIndex;
+    
+    if ( iDeviceState < UsbShai::EUsbPeripheralStateConfigured)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+        iLastError = KErrGeneral;
+        }    
+    else if (EndpointExists(ep) == EFalse)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint does not exist"));
+        iLastError = KErrGeneral;
+        }
+    else if (iRealEndpoints[EpAddr2Idx(ep)].iLEndpoint->iInfo.iType != UsbShai::KUsbEpTypeIsochronous)
+        {
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint is not isochronous"));
+        iLastError = KErrGeneral;
+        }
+    else 
+        {
+        // We always send 0:
+        *reinterpret_cast<TUint16*>(iEp0_TxBuf) = 0x00;
+        if (iConTransferMgr->SetupEndpointZeroWrite(iEp0_TxBuf, 2) == KErrNone)
+            {
+            iEp0WritePending = ETrue;
+            }
+        else
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Wrong: Write to Ep0 Failed"));
+            }
+        }
+    }
+
+
+#ifdef USB_SUPPORTS_SET_DESCRIPTOR_REQUEST
+void DUsbClientController::ProceedSetDescriptor()
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ProceedSetDescriptor()"));
+    // iEp0DataReceived already reflects the current buffer state
+    if (iEp0DataReceived < iConTransferMgr->PktParser().DataLength())
+        {
+        // Not yet all data received => proceed
+        return;
+        }
+    if (iEp0DataReceived > iConTransferMgr->PktParser().DataLength())
+        {
+        // Error: more data received than expected
+        // but we don't care...
+        }
+    const TUint8 type = HighByte(iConTransferMgr->PktParser().Value());
+    if (type == KUsbDescType_String)
+        {
+        // set/add new string descriptor
+        }
+    else
+        {
+        // set/add new ordinary descriptor
+        }
+    TUint8 index = LowByte(iConTransferMgr->PktParser().Value());
+    TUint16 langid = iConTransferMgr->PktParser().Index();
+    TUint16 length_total = iConTransferMgr->PktParser().DataLength();
+
+    iConTransferMgr->SendEp0ZeroByteStatusPacket();
+    }
+#endif
+
+
+// --- Secondary (Helper) Functions
+
+void DUsbClientController::SetClearHaltFeature(TInt aRealEndpoint, TUint8 aRequest)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::SetClearHaltFeature()"));
+    if (aRequest == KUsbRequest_SetFeature)
+        {
+        if (iRealEndpoints[aRealEndpoint].iHalt)
+            {
+            // (This condition is not really an error)
+            __KTRACE_OPT(KUSB, Kern::Printf("  Warning: HALT feature already set"));
+            return;
+            }
+        __KTRACE_OPT(KUSB, Kern::Printf("  setting HALT feature for real endpoint %d",
+                                        aRealEndpoint));
+        iController.StallEndpoint(aRealEndpoint);
+        iRealEndpoints[aRealEndpoint].iHalt = ETrue;
+        }
+    else                                                    // KUsbRequest_ClearFeature
+        {
+        if (iRealEndpoints[aRealEndpoint].iHalt == EFalse)
+            {
+            // In this case, before we return, the data toggles are reset to DATA0.
+            __KTRACE_OPT(KUSB, Kern::Printf("  Warning: HALT feature already cleared"));
+            iController.ResetDataToggle(aRealEndpoint);
+            return;
+            }
+        __KTRACE_OPT(KUSB, Kern::Printf("  clearing HALT feature for real endpoint %d",
+                                        aRealEndpoint));
+        iController.ResetDataToggle(aRealEndpoint);
+        iController.ClearStallEndpoint(aRealEndpoint);
+        iRealEndpoints[aRealEndpoint].iHalt = EFalse;
+        }
+    EpStatusNotify(aRealEndpoint);                            // only called if actually something changed
+    }
+
+
+TInt DUsbClientController::ClearHaltFeature(TInt aRealEndpoint)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ClearHaltFeature()"));
+    if (iRealEndpoints[aRealEndpoint].iHalt != EFalse)
+        {
+        iController.ClearStallEndpoint(aRealEndpoint);
+        iRealEndpoints[aRealEndpoint].iHalt = EFalse;
+        }
+    return KErrNone;
+    }
+
+
+void DUsbClientController::ChangeConfiguration(TUint16 aValue)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ChangeConfiguration()"));
+    // New configuration is the same as the old one: 0
+    if (iCurrentConfig == 0 && aValue == 0)
+        {
+        // no-op
+        __KTRACE_OPT(KUSB, Kern::Printf("  Configuration: New == Old == 0 --> exiting"));
+        return;
+        }
+    // New configuration is the same as the old one (but not 0)
+    if (iCurrentConfig == aValue)
+        {
+        // no-op
+        __KTRACE_OPT(KUSB, Kern::Printf("  Configuration: New == Old == %d --> exiting", aValue));
+        return;
+        }
+    // Device is already configured
+    if (iCurrentConfig != 0)
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  Device was configured: %d", iCurrentConfig));
+        // Tear down all interface(set)s of the old configuration
+        RPointerArray<TUsbcInterfaceSet>& ifcsets = CurrentConfig()->iInterfaceSets;
+        for (TInt i = 0; i < ifcsets.Count(); ++i)
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Tearing down InterfaceSet %d", i));
+            InterfaceSetTeardown(ifcsets[i]);
+            }
+        iCurrentConfig = 0;
+        // Enter Address state (from Configured)
+        if (iDeviceState == UsbShai::EUsbPeripheralStateConfigured)
+            NextDeviceState(UsbShai::EUsbPeripheralStateAddress);
+        }
+    // Device gets a new configuration
+    if (aValue != 0)
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  Device gets new configuration..."));
+        // Setup all alternate settings 0 of all interfaces
+        // (Don't separate the next two lines of code.)
+        iCurrentConfig = aValue;
+        RPointerArray<TUsbcInterfaceSet>& ifcsets = CurrentConfig()->iInterfaceSets;
+        const TInt n = ifcsets.Count();
+        for (TInt i = 0; i < n; ++i)
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Setting up InterfaceSet %d", i));
+            InterfaceSetup(ifcsets[i]->iInterfaces[0]);
+            }
+        // Enter Configured state (from Address or Configured)
+        NextDeviceState(UsbShai::EUsbPeripheralStateConfigured);
+        }
+    __KTRACE_OPT(KUSB, Kern::Printf("  New configuration: %d", iCurrentConfig));
+    return;
+    }
+
+
+void DUsbClientController::InterfaceSetup(TUsbcInterface* aIfc)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::InterfaceSetup()"));
+    const TInt num_eps = aIfc->iEndpoints.Count();
+    for (TInt i = 0; i < num_eps; i++)
+        {
+        // Prepare this endpoint for I/O
+        TUsbcLogicalEndpoint* const ep = aIfc->iEndpoints[i];
+        // (TUsbcLogicalEndpoint's FS/HS endpoint sizes and interval values got
+        //  adjusted in its constructor.)
+        if (iHighSpeed)
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Setting Ep info size to %d (HS)", ep->iEpSize_Hs));
+            ep->iInfo.iSize = ep->iEpSize_Hs;
+            }
+        else
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Setting Ep info size to %d (FS)", ep->iEpSize_Fs));
+            ep->iInfo.iSize = ep->iEpSize_Fs;
+            }
+        const TInt idx = EpAddr2Idx(ep->iPEndpoint->iEndpointAddr);
+        if (iController.ConfigureEndpoint(idx, ep->iInfo) != KErrNone)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint %d configuration failed", idx));
+            continue;
+            }
+        // Should there be a problem with it then we could try resetting the ep
+        // data toggle at this point (or before the Configure) as well.
+        __KTRACE_OPT(KUSB, Kern::Printf("  Connecting real ep addr 0x%02x & logical ep #%d",
+                                        ep->iPEndpoint->iEndpointAddr, ep->iLEndpointNum));
+        ep->iPEndpoint->iLEndpoint = ep;
+        }
+    aIfc->iInterfaceSet->iCurrentInterface = aIfc->iSettingCode;
+    return;
+    }
+
+
+void DUsbClientController::InterfaceSetTeardown(TUsbcInterfaceSet* aIfcSet)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::InterfaceSetTeardown()"));
+    if (aIfcSet->iInterfaces.Count() == 0)
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  No interfaces exist - returning"));
+        return;
+        }
+    RPointerArray<TUsbcLogicalEndpoint>& eps = aIfcSet->CurrentInterface()->iEndpoints;
+    const TInt num_eps = eps.Count();
+    for (TInt i = 0; i < num_eps; i++)
+        {
+        TUsbcLogicalEndpoint* const ep = eps[i];
+        const TInt idx = EpAddr2Idx(ep->iPEndpoint->iEndpointAddr);
+
+        CancelTransferRequests(idx);
+
+        if (!ep->iPEndpoint->iLEndpoint)
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  real ep %d not configured: skipping", idx));
+            continue;
+            }
+        if (iController.ResetDataToggle(idx) != KErrNone)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint %d data toggle reset failed", idx));
+            }
+        if (iController.DeConfigureEndpoint(idx) != KErrNone)
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint %d de-configuration failed", idx));
+            }
+
+        __KTRACE_OPT(KUSB, Kern::Printf("  disconnecting real ep & logical ep"));
+        ep->iPEndpoint->iLEndpoint = NULL;
+        }
+    if (aIfcSet->CurrentInterface() != 0)
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  Resetting alternate interface setting to 0"));
+        //Add this mutex to protect the interface set data structure
+        if (NKern::CurrentContext() == EThread)
+            {
+            NKern::FMWait(&iMutex);
+            }
+        
+        aIfcSet->iCurrentInterface = 0;
+        if (NKern::CurrentContext() == EThread)
+            {
+            NKern::FMSignal(&iMutex);
+            }        
+        }
+    return;
+    }
+
+
+void DUsbClientController::ChangeInterface(TUsbcInterface* aIfc)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::ChangeInterface()"));
+    TUsbcInterfaceSet* ifcset = aIfc->iInterfaceSet;
+    const TUint8 setting = aIfc->iSettingCode;
+    if (ifcset->iCurrentInterface == setting)
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  New Ifc == old Ifc: nothing to do"));
+        return;
+        }
+    __KTRACE_OPT(KUSB, Kern::Printf("  Setting new interface setting #%d", setting));
+    InterfaceSetTeardown(ifcset);
+    InterfaceSetup(aIfc);
+    StatusNotify(static_cast<UsbShai::TUsbPeripheralState>(KUsbAlternateSetting | setting), ifcset->iClientId);
+    }
+
+
+// aFunction gets called, successively, with the endpoint index of every ep in-use as its argument.
+// (BTW: The declaration "type (class::*name)(params)" makes <name> a "pointer to element function".)
+//
+TInt DUsbClientController::DoForEveryEndpointInUse(TInt (DUsbClientController::*aFunction)(TInt), TInt& aCount)
+    {
+    __KTRACE_OPT(KUSB, Kern::Printf("DUsbClientController::DoForEveryEndpointInUse()"));
+    aCount = 0;
+    TUsbcConfiguration* const config = CurrentConfig();
+    if (!config)
+        {
+        __KTRACE_OPT(KUSB, Kern::Printf("  Device is not configured - returning"));
+        return KErrNone;
+        }
+    RPointerArray<TUsbcInterfaceSet>& ifcsets = config->iInterfaceSets;
+    const TInt num_ifcsets = ifcsets.Count();
+    for (TInt i = 0; i < num_ifcsets; i++)
+        {
+        RPointerArray<TUsbcLogicalEndpoint>& eps = ifcsets[i]->CurrentInterface()->iEndpoints;
+        const TInt num_eps = eps.Count();
+        for (TInt j = 0; j < num_eps; j++)
+            {
+            const TInt ep_num = EpAddr2Idx(eps[j]->iPEndpoint->iEndpointAddr);
+            const TInt result = (this->*aFunction)(ep_num);
+            ++aCount;
+            if (result != KErrNone)
+                {
+                return result;
+                }
+            }
+        }
+    return KErrNone;
+    }
+
+// Data Tx is done.
+void DUsbClientController::ProcessDataInPacket(TInt aCount,TInt aErrCode)
+    {
+    // Clear Error Code
+    iLastError = KErrNone;
+    
+    // For tx, no premature end is allowed.
+    if(aErrCode != KErrNone)
+        {
+        // something wrong in hardware, we can do nothing as remedy
+        // just stall the endpoint.
+        iConTransferMgr->StallEndpoint(KEp0_In);
+        iConTransferMgr->SetupEndpointZeroRead();
+        
+        // set err code to Error general if end point is stalled
+        iLastError = KErrGeneral;
+        }
+    else
+        {
+        // no longer a write pending
+        iEp0WritePending = EFalse;
+        
+        // If it was a client who set up this transmission, we report to that client
+        if (iEp0ClientDataTransmitting)
+            {
+            iEp0ClientDataTransmitting = EFalse;
+            TUsbcRequestCallback* const p = iRequestCallbacks[KEp0_Tx];
+            
+            if (p)
+                {
+                __ASSERT_DEBUG((p->iTransferDir == UsbShai::EControllerWrite), Kern::Fault(KUsbPILPanicCat, __LINE__));
+                p->iError = aErrCode;
+                p->iTxBytes = aCount;
+                
+                // tell the client that the sending is done
+                // later, it is possible that a status out packet comes in,
+                // just ignore it.
+                ProcessDataTransferDone(*p);
+                }
+            else
+                {
+                // we should never goes here
+                iConTransferMgr->StallEndpoint(KEp0_In);
+                
+                // request not found
+                iLastError = KErrNotFound;
+                }
+            }
+        // else
+        //   it is our own who sending the data, no more action needed
+        }
+    }
+
+// Status Rx is done    
+void DUsbClientController::ProcessStatusOutPacket(TInt aErrCode)
+    {
+    // Clear Error Code
+    iLastError = KErrNone;
+    
+    // Dangdang, psl saying a status out packet recieved from
+    // host, but, we already completed user's writting request, just ignore it.
+    
+    // any way, receiving this means no write is pending.
+    iEp0WritePending = EFalse;
+    }
+    
+// Data Rx is (partial) done
+void DUsbClientController::ProcessDataOutPacket(TInt aCount,TInt aErrCode)
+    {
+    // Clear Error Code
+    iLastError = KErrNone;
+    
+    if (aErrCode != KErrNone && aErrCode != KErrPrematureEnd)
+        {
+        // something wrong in hardware, we can do nothing as remedy
+        // just stall the endpoint.
+        iConTransferMgr->StallEndpoint(KEp0_Out);
+        iConTransferMgr->SetupEndpointZeroRead();
+        
+        // set err code to Error general if end point is stalled
+        iLastError = KErrGeneral;       
+        }
+    else
+        {
+        // Trim aCount with iEp0MaxPacketSize per packet
+        if (aCount > iEp0MaxPacketSize)
+            {
+            aCount = iEp0MaxPacketSize;
+            }
+               
+        iEp0DataReceived += aCount;
+        
+        if (iEp0ClientId == NULL)
+            {
+            // it is us( not an app), who owns this transaction
+            switch( iConTransferMgr->PktParser().Request())
+                {
+#ifdef USB_SUPPORTS_SET_DESCRIPTOR_REQUEST                
+                case KUsbRequest_SetDescriptor:
+                    {
+                    memcpy(iEp0_RxCollectionBuf + iEp0DataReceived, iEp0_RxBuf, aCount);                    
+                    
+                    // Status will be sent in side this function
+                    // if we had recieved enough bytes
+                    ProceedSetDescriptor();
+                    }
+                    break;
+#endif                    
+                default:
+                    {
+                    iConTransferMgr->StallEndpoint(KEp0_In);
+                    ResetEp0DataOutVars();
+                    
+                    // set err code to Error general if end point is stalled
+                    iLastError = KErrGeneral;
+                    }
+                    break;
+                }
+            
+            if (iEp0DataReceived >= iConTransferMgr->PktParser().DataLength())
+                {                
+                // all data seems now to be here
+                ResetEp0DataOutVars();
+                }                
+            }
+        else
+            {
+            // it is an application who is requesting this data
+            // pass the data on to a client
+            
+            // it is the client's responsibility of sending a status
+            // packet back to host to indicate the whole transfer is
+            // done
+            
+            // Find the client Request callback
+            TSglQueIter<TUsbcRequestCallback> iter(iEp0ReadRequestCallbacks);
+            TUsbcRequestCallback* p;
+            while ((p = iter++) != NULL)
+                {
+                if (p->Owner() == iEp0ClientId)
+                    {
+                    memcpy(p->iBufferStart, iEp0_RxBuf, aCount);
+                    p->iError = KErrNone;
+                    *(p->iPacketSize) = aCount;
+                    p->iRxPackets = 1;
+                    *(p->iPacketIndex) = 0;
+                    break;
+                    }
+                }
+            
+            // pass data to client if found one.
+            if ( p != NULL)
+                {
+                ProcessDataTransferDone(*p);
+                    
+                if (iEp0DataReceived >= iConTransferMgr->PktParser().DataLength())
+                    {
+                    // all data seems now to be here
+                    ResetEp0DataOutVars();
+                    }
+                
+                iLastError = KErrNone;
+                
+                }
+            else
+                {
+                // that's bad, we found a client is request this data
+                // but no matching request callback found.
+                
+                iEp0_RxExtraCount = aCount;
+                //iEp0_RxExtraData = ETrue;
+                //iEp0_RxExtraError = aErrCode;
+                iEp0DataReceived -= aCount;
+                
+                // No status packet will be send to host since no client is reading this data,
+                // waiting client to send a status packet.
+                
+                iLastError = KErrNotFound;
+                }
+            }
+        }
+    }
+
+// Status Tx is done    
+void DUsbClientController::ProcessStatusInPacket(TInt aErrCode)
+    {
+    // Clear Error Code
+    iLastError = KErrNone; 
+
+    // it is time to start a new read
+    iEp0WritePending = EFalse;
+    }
+
+//
+// Setup Rx is done
+//
+void DUsbClientController::ProcessSetupPacket(TInt aCount,TInt aErrCode)
+    {
+    
+    if (aErrCode != KErrNone)
+        {
+        // something wrong in hardware, we can do nothing as remedy
+        // just stall the endpoint.
+        iConTransferMgr->StallEndpoint(KEp0_Out);
+        iConTransferMgr->SetupEndpointZeroRead();
+        
+        // set err code to Error general if end point is stalled
+        iLastError = KErrGeneral;       
+        }
+    
+    TUsbcSetup packet;
+    Buffer2Setup(iEp0_RxBuf, packet);
+    
+    // Clear Error Code
+    iLastError = KErrNone;
+    
+    // If this is a standard request, we can handle it here
+    // not need to bother app layer
+    if ((packet.iRequestType & KUsbRequestType_TypeMask) == KUsbRequestType_TypeStd)
+        {
+        // Fixme: this may not needed any more
+        iEp0ReceivedNonStdRequest = EFalse;
+        ProcessStandardRequest(aCount,packet);
+        }
+    else
+        {
+        // Fixme: This may not needed anymore
+        iEp0ReceivedNonStdRequest = ETrue;
+        ProcessNonStandardRequest(aCount,packet);
+        }
+    }
+
+#define USB_PROCESS_REQUEST(request,param) \
+    do \
+    { \
+    Process ## request(param); \
+    if (iLastError != KErrNone) \
+        { \
+        __KTRACE_OPT(KUSB, \
+                    Kern::Printf("  ProcessEp0SetupReceived: Stalling Ep0")); \
+        iConTransferMgr->StallEndpoint(KEp0_In); \
+        } \
+    }while(0)
+    
+    
+//
+// Standard request
+// Please note that:Macro USB_PROCESS_REQUEST(xxx) will stall endpoint
+// if anything wrong during the process, in which case status packet is 
+// not needed.
+//
+void DUsbClientController::ProcessStandardRequest(TInt /*aCount*/,const TUsbcSetup& aPacket)
+    {
+    switch (aPacket.iRequest)
+        {
+        case KUsbRequest_GetStatus:
+            switch (aPacket.iRequestType & KUsbRequestType_DestMask)
+                { // Recipient
+                case KUsbRequestType_DestDevice:
+                    USB_PROCESS_REQUEST(GetDeviceStatus,aPacket);
+                    break;
+                    
+                case KUsbRequestType_DestIfc:
+                    USB_PROCESS_REQUEST(GetInterfaceStatus,aPacket);
+                    break;
+                    
+                case KUsbRequestType_DestEp:
+                    USB_PROCESS_REQUEST(GetEndpointStatus,aPacket);
+                    break;
+                    
+                default:
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: GET STATUS - Other or Unknown recipient"));
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  -> DUsbClientController::ProcessEp0SetupReceived: "
+                                                      "Stalling Ep0"));
+                    iConTransferMgr->StallEndpoint(KEp0_In);
+                    iLastError = KErrGeneral;
+                    break;
+                }
+                break;
+        
+        case KUsbRequest_ClearFeature:
+        case KUsbRequest_SetFeature:
+            switch (aPacket.iRequestType & KUsbRequestType_DestMask)
+                { // Recipient
+                case KUsbRequestType_DestDevice:
+                    USB_PROCESS_REQUEST(SetClearDevFeature,aPacket);
+                    break;
+                case KUsbRequestType_DestIfc:
+                    // will 100% stall endpoint
+                    USB_PROCESS_REQUEST(SetClearIfcFeature,aPacket);
+                    break;
+                case KUsbRequestType_DestEp:
+                    USB_PROCESS_REQUEST(SetClearEpFeature,aPacket);
+                    break;
+                default:
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: SET/CLEAR FEATURE - "
+                                                      "Other or Unknown recipient"));
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  -> Stalling Ep0"));
+                    iConTransferMgr->StallEndpoint(KEp0_In);
+                    iLastError = KErrGeneral;
+                    break;
+                }
+                break;
+                
+        case KUsbRequest_SetAddress:
+            USB_PROCESS_REQUEST(SetAddress,aPacket);
+            break;
+            
+        case KUsbRequest_GetDescriptor:
+            USB_PROCESS_REQUEST(GetDescriptor,aPacket);
+            break;
+            
+        case KUsbRequest_SetDescriptor:
+            USB_PROCESS_REQUEST(SetDescriptor,aPacket);
+            break;
+            
+        case KUsbRequest_GetConfig:
+            USB_PROCESS_REQUEST(GetConfiguration,aPacket);
+            break;
+            
+        case KUsbRequest_SetConfig:
+            USB_PROCESS_REQUEST(SetConfiguration,aPacket);
+            break;
+            
+        case KUsbRequest_GetInterface:
+            USB_PROCESS_REQUEST(GetInterface,aPacket);
+            break;
+            
+        case KUsbRequest_SetInterface:
+            USB_PROCESS_REQUEST(SetInterface,aPacket);
+            break;
+            
+        case KUsbRequest_SynchFrame:
+            USB_PROCESS_REQUEST(SynchFrame,aPacket);
+            break;
+            
+        default:
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Unknown/unsupported Std Setup Request"));
+            __KTRACE_OPT(KPANIC, Kern::Printf("  -> Stalling Ep0"));
+            iConTransferMgr->StallEndpoint(KEp0_In);
+            iLastError = KErrGeneral;
+            break;
+        }       
+    }
+
+#undef USB_PROCESS_REQUEST
+    
+//
+// class- or vendor-specific request    
+// we dont send back any status to host in PIL for class- or vendor-specific request
+// if no client is waiting, stall the endpoint
+// if client is not ready, just record them and waiting for client to read them
+// (and, send a status packet)
+//
+void DUsbClientController::ProcessNonStandardRequest(TInt aCount,const TUsbcSetup& aPacket)
+    {
+    // Find out which client can handle this request
+    const DBase* client = FindNonStandardRequestClient(aPacket.iRequestType & KUsbRequestType_DestMask,aPacket);
+        
+    // If client is valide
+    if (client != NULL)
+        {
+        // Try to relay aPacket to the real recipient
+        TSglQueIter<TUsbcRequestCallback> iter(iEp0ReadRequestCallbacks);
+        TUsbcRequestCallback* p;
+        
+        // Find out the request callback with match the client 
+        // returned from last FindNonStandardRequestClient().
+        while ((p = iter++) != NULL)
+            {
+            if (p->Owner() == client)
+                {
+                __ASSERT_DEBUG((p->iEndpointNum == 0), Kern::Fault(KUsbPILPanicCat, __LINE__));
+                __ASSERT_DEBUG((p->iTransferDir == UsbShai::EControllerRead), Kern::Fault(KUsbPILPanicCat, __LINE__));
+                __KTRACE_OPT(KUSB, Kern::Printf("  Found Ep0 read request"));
+                if (aPacket.iLength != 0)
+                    {
+                    if ((aPacket.iRequestType & KUsbRequestType_DirMask) == KUsbRequestType_DirToDev)
+                        {
+                        // Data transfer & direction OUT => there'll be a DATA_OUT stage
+                        __KTRACE_OPT(KUSB, Kern::Printf("  Next is DATA_OUT: setting up DataOutVars"));
+                        SetEp0DataOutVars(client);
+                        }
+                    else if ((aPacket.iRequestType & KUsbRequestType_DirMask) == KUsbRequestType_DirToHost)
+                        {
+                        // For possible later use (ZLP).
+                        iEp0_TxNonStdCount = aPacket.iLength;
+                        }
+                    }
+                    
+                // Found the request callback, jump out now
+                break;                
+                }
+            }
+            
+        // if a request callback matching the client is found,
+        // complete the request
+        if( p != NULL)
+            {
+            __KTRACE_OPT(KUSB, Kern::Printf("  Ep0 read request completed to client"));
+            memcpy(p->iBufferStart, iEp0_RxBuf, aCount);
+            p->iError = KErrNone;
+            *(p->iPacketSize) = aCount;
+            p->iRxPackets = 1;
+            *(p->iPacketIndex) = 0;
+            ProcessDataTransferDone(*p);            
+            }
+        else
+            {            
+            __KTRACE_OPT(KUSB, Kern::Printf("  Ep0 read request not found: setting RxExtra vars (Setup)"));
+            iEp0_RxExtraCount = aCount;
+            //iEp0_RxExtraData = ETrue;
+            //iEp0_RxExtraError = aErrCode;
+            iSetupPacketPending = ETrue;
+            
+            // For setup packet,a zero bytes status is always needed
+            iLastError = KErrNotFound;           
+            }
+        }
+    else // if (client == NULL)
+        {
+        // Pil don't know how to deal with non-standard request, stall endpoint
+        __KTRACE_OPT(KPANIC, Kern::Printf("  Ep0 request error: Stalling Ep0"));
+        iConTransferMgr->StallEndpoint(KEp0_In);
+        iLastError = KErrGeneral;
+        }
+    }
+    
+const DBase* DUsbClientController::FindNonStandardRequestClient(TUint8 aPacketTypeDestination,const TUsbcSetup& aPacket)
+    {
+    const DBase* client = NULL;
+    
+    switch (aPacketTypeDestination)
+        { // Recipient
+        case KUsbRequestType_DestDevice:
+            {
+            client = iEp0DeviceControl;
+            }
+            break;
+            
+        case KUsbRequestType_DestIfc:
+            {
+            //Add this mutex to protect the interface set data structure
+            if (NKern::CurrentContext() == EThread)
+                {
+                NKern::FMWait(&iMutex);
+                }
+                
+            if ( iDeviceState < UsbShai::EUsbPeripheralStateConfigured)
+                {
+                __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+                }
+            else
+                {
+                const TUsbcInterfaceSet* const ifcset_ptr =
+                    InterfaceNumber2InterfacePointer(aPacket.iIndex);
+                    
+                //In some rare case, ifcset_ptr is not NULL but the ifcset_ptr->iInterfaces.Count() is 0,
+                //so panic will happen when excute the following line. so I add the conditon
+                //0 != ifcset_ptr->iInterfaces.Count() here.
+                if (ifcset_ptr && 0 != ifcset_ptr->iInterfaces.Count())
+                    {
+                    if (ifcset_ptr->CurrentInterface()->iNoEp0Requests)
+                        {
+                        __KTRACE_OPT(KUSB, Kern::Printf("  Recipient says: NoEp0RequestsPlease"));
+                        }
+                    else
+                        {
+                        client = ifcset_ptr->iClientId;
+                        }
+                    }
+                else
+                    {
+                    __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Interface 0x%02x does not exist",
+                                                      aPacket.iIndex));
+                    }
+                }
+                
+            if (NKern::CurrentContext() == EThread)
+                {
+                NKern::FMSignal(&iMutex);
+                }
+            }
+            break;
+                        
+        case KUsbRequestType_DestEp:
+            {
+            //Add this mutex to protect the interface set data structure
+            if (NKern::CurrentContext() == EThread)
+                {
+                NKern::FMWait(&iMutex);
+                }
+            if ( iDeviceState < UsbShai::EUsbPeripheralStateConfigured)
+                {
+                __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Invalid device state"));
+                }
+            else if (EndpointExists(aPacket.iIndex) == EFalse)
+                {
+                __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Endpoint 0x%02x does not exist",
+                                                  aPacket.iIndex));
+                }
+            else
+                {
+                const TInt idx = EpAddr2Idx(aPacket.iIndex);
+                const TUsbcInterfaceSet* const ifcset_ptr =
+                    iRealEndpoints[idx].iLEndpoint->iInterface->iInterfaceSet;
+                if (ifcset_ptr->CurrentInterface()->iNoEp0Requests)
+                    {
+                    __KTRACE_OPT(KUSB, Kern::Printf("  Recipient says: NoEp0RequestsPlease"));
+                    }
+                else
+                    {
+                    client = ifcset_ptr->iClientId;
+                    }
+                }
+            if (NKern::CurrentContext() == EThread)
+                {
+                NKern::FMSignal(&iMutex);
+                }
+            }
+            break;
+            
+        default:
+            {
+            __KTRACE_OPT(KPANIC, Kern::Printf("  Error: Other or Unknown recipient"));
+            break;
+            }
+        }
+        
+    return client;
+    }
+
+TInt DUsbClientController::ProcessSetupEndpointZeroRead()
+    {
+    __KTRACE_OPT(KPANIC, Kern::Printf("DUsbClientController:: Read EP0 Issued"));
+    return iController.SetupEndpointZeroRead();
+    }
+    
+TInt DUsbClientController::ProcessSetupEndpointZeroWrite(const TUint8* aBuffer, TInt aLength, TBool aZlpReqd)
+    {
+    __KTRACE_OPT(KPANIC, Kern::Printf("DUsbClientController:: Write EP0 Issued"));
+    return iController.SetupEndpointZeroWrite(aBuffer,aLength,aZlpReqd);
+    }
+    
+TInt DUsbClientController::ProcessSendEp0ZeroByteStatusPacket()
+    {
+    __KTRACE_OPT(KPANIC, Kern::Printf("DUsbClientController:: Zero Status to EP0 Issued"));
+    return iController.SendEp0ZeroByteStatusPacket();
+    }
+    
+TInt DUsbClientController::ProcessStallEndpoint(TInt aRealEndpoint)
+    {
+    __KTRACE_OPT(KPANIC, Kern::Printf("DUsbClientController:: EP0(%d) Stall Issued",aRealEndpoint));
+    return iController.StallEndpoint(aRealEndpoint);
+    }
+
+void DUsbClientController::ProcessEp0SetupPacketProceed()
+    {
+    __KTRACE_OPT(KPANIC, Kern::Printf("DUsbClientController:: Missed setup packet procced"));
+    iController.Ep0ReadSetupPktProceed();
+    }
+    
+void DUsbClientController::ProcessEp0DataPacketProceed()
+    {
+    __KTRACE_OPT(KPANIC, Kern::Printf("DUsbClientController:: Missed data packet procced"));
+    iController.Ep0ReadDataPktProceed();
+    }
+    
+// -eof-