
/* Includes ------------------------------------------------------------------*/
#include "usb_lib.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ValBit(VAR,Place)    (VAR & (1 << Place))
#define SetBit(VAR,Place)    (VAR |= (1 << Place))
#define ClrBit(VAR,Place)    (VAR &= ((1 << Place) ^ 255))
#define Send0LengthData() { _SetEPTxCount(ENDP0, 0); \
    vSetEPTxStatus(EP_TX_VALID); \
  }

#define vSetEPRxStatus(st) (SaveRState = st)
#define vSetEPTxStatus(st) (SaveTState = st)

#define USB_StatusIn() Send0LengthData()
#define USB_StatusOut() vSetEPRxStatus(EP_RX_VALID)

#define StatusInfo0 StatusInfo.bw.bb1 /* Reverse bb0 & bb1 */
#define StatusInfo1 StatusInfo.bw.bb0

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint16_t_uint8_t StatusInfo;
__IO uint32_t DevRemoteWakeup = 0;
bool Data_Mul_MaxPacketSize = FALSE;
/* Private function prototypes -----------------------------------------------*/
static void DataStageOut(void);
static void DataStageIn(void);
static void NoData_Setup0(void);
static void Data_Setup0(void);
/* Private functions ---------------------------------------------------------*/

/**
  * Function Name  : Standard_GetConfiguration.
  * Description    : Return the current configuration variable address.
  * Input          : Length - How many bytes are needed.
  * Output         : None.
  * Return         : Return 1 , if the request is invalid when "Length" is 0.
  *                  Return "Buffer" if the "Length" is not 0.
  */
uint8_t *Standard_GetConfiguration(uint16_t Length)
{
  if (Length == 0)
  {
    pInformation->Ctrl_Info.Usb_wLength =
      sizeof(pInformation->Current_Configuration);
    return 0;
  }
  pUser_Standard_Requests->User_GetConfiguration();
  return (uint8_t *)&pInformation->Current_Configuration;
}

/**
  * Function Name  : Standard_SetConfiguration.
  * Description    : This routine is called to set the configuration value
  *                  Then each class should configure device itself.
  * Input          : None.
  * Output         : None.
  * Return         : Return USB_SUCCESS, if the request is performed.
  *                  Return USB_UNSUPPORT, if the request is invalid.
  */
RESULT Standard_SetConfiguration(void)
{

  if ((pInformation->USBwValue0 <=
       Device_Table.Total_Configuration) && (pInformation->USBwValue1 == 0)
      && (pInformation->USBwIndex == 0)) /*call Back usb spec 2.0*/
  {
    pInformation->Current_Configuration = pInformation->USBwValue0;
    pUser_Standard_Requests->User_SetConfiguration();
    return USB_SUCCESS;
  }
  else
  {
    return USB_UNSUPPORT;
  }
}

/**
  * Function Name  : Standard_GetInterface.
  * Description    : Return the Alternate Setting of the current interface.
  * Input          : Length - How many bytes are needed.
  * Output         : None.
  * Return         : Return 0, if the request is invalid when "Length" is 0.
  *                  Return "Buffer" if the "Length" is not 0.
  */
uint8_t *Standard_GetInterface(uint16_t Length)
{
  if (Length == 0)
  {
    pInformation->Ctrl_Info.Usb_wLength =
      sizeof(pInformation->Current_AlternateSetting);
    return 0;
  }
  pUser_Standard_Requests->User_GetInterface();
  return (uint8_t *)&pInformation->Current_AlternateSetting;
}

/**
  * Function Name  : Standard_SetInterface.
  * Description    : This routine is called to set the interface.
  *                  Then each class should configure the interface them self.
  * Input          : None.
  * Output         : None.
  * Return         : - Return USB_SUCCESS, if the request is performed.
  *                  - Return USB_UNSUPPORT, if the request is invalid.
  */
RESULT Standard_SetInterface(void)
{
  RESULT Re;
  /*Test if the specified Interface and Alternate Setting are supported by
    the application Firmware*/
  Re = (*pProperty->Class_Get_Interface_Setting)(pInformation->USBwIndex0, pInformation->USBwValue0);

  if (pInformation->Current_Configuration != 0)
  {
    if ((Re != USB_SUCCESS) || (pInformation->USBwIndex1 != 0)
        || (pInformation->USBwValue1 != 0))
    {
      return  USB_UNSUPPORT;
    }
    else if (Re == USB_SUCCESS)
    {
      pUser_Standard_Requests->User_SetInterface();
      pInformation->Current_Interface = pInformation->USBwIndex0;
      pInformation->Current_AlternateSetting = pInformation->USBwValue0;
      return USB_SUCCESS;
    }

  }

  return USB_UNSUPPORT;
}

/**
  * Function Name  : Standard_GetStatus.
  * Description    : Copy the device request data to "StatusInfo buffer".
  * Input          : - Length - How many bytes are needed.
  * Output         : None.
  * Return         : Return 0, if the request is at end of data block,
  *                  or is invalid when "Length" is 0.
  */
uint8_t *Standard_GetStatus(uint16_t Length)
{
  if (Length == 0)
  {
    pInformation->Ctrl_Info.Usb_wLength = 2;
    return 0;
  }

  /* Reset Status Information */
  StatusInfo.w = 0;

  if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT))
  {
    /*Get Device Status */
    uint8_t Feature = pInformation->Current_Feature;

    /* Remote Wakeup enabled */
    if (ValBit(Feature, 5))
    {
      SetBit(StatusInfo0, 1);
    }
    else
    {
      ClrBit(StatusInfo0, 1);
    }      

    /* Bus-powered */
    if (ValBit(Feature, 6))
    {
      SetBit(StatusInfo0, 0);
    }
    else /* Self-powered */
    {
      ClrBit(StatusInfo0, 0);
    }
  }
  /*Interface Status*/
  else if (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
  {
    return (uint8_t *)&StatusInfo;
  }
  /*Get EndPoint Status*/
  else if (Type_Recipient == (STANDARD_REQUEST | ENDPOINT_RECIPIENT))
  {
    uint8_t Related_Endpoint;
    uint8_t wIndex0 = pInformation->USBwIndex0;

    Related_Endpoint = (wIndex0 & 0x0f);
    if (ValBit(wIndex0, 7))
    {
      /* IN endpoint */
      if (_GetTxStallStatus(Related_Endpoint))
      {
        SetBit(StatusInfo0, 0); /* IN Endpoint stalled */
      }
    }
    else
    {
      /* OUT endpoint */
      if (_GetRxStallStatus(Related_Endpoint))
      {
        SetBit(StatusInfo0, 0); /* OUT Endpoint stalled */
      }
    }

  }
  else
  {
    return NULL;
  }
  pUser_Standard_Requests->User_GetStatus();
  return (uint8_t *)&StatusInfo;
}

/**
  * Function Name  : Standard_ClearFeature.
  * Description    : Clear or disable a specific feature.
  * Input          : None.
  * Output         : None.
  * Return         : - Return USB_SUCCESS, if the request is performed.
  *                  - Return USB_UNSUPPORT, if the request is invalid.
  */
RESULT Standard_ClearFeature(void)
{
  uint32_t     Type_Rec = Type_Recipient;
  uint32_t     Status;


  if (Type_Rec == (STANDARD_REQUEST | DEVICE_RECIPIENT))
  {/*Device Clear Feature*/
    ClrBit(pInformation->Current_Feature, 5);
    return USB_SUCCESS;
  }
  else if (Type_Rec == (STANDARD_REQUEST | ENDPOINT_RECIPIENT))
  {/*EndPoint Clear Feature*/
    DEVICE* pDev;
    uint32_t Related_Endpoint;
    uint32_t wIndex0;
    uint32_t rEP;

    if ((pInformation->USBwValue != ENDPOINT_STALL)
        || (pInformation->USBwIndex1 != 0))
    {
      return USB_UNSUPPORT;
    }

    pDev = &Device_Table;
    wIndex0 = pInformation->USBwIndex0;
    rEP = wIndex0 & ~0x80;
    Related_Endpoint = ENDP0 + rEP;

    if (ValBit(pInformation->USBwIndex0, 7))
    {
      /*Get Status of endpoint & stall the request if the related_ENdpoint
      is Disabled*/
      Status = _GetEPTxStatus(Related_Endpoint);
    }
    else
    {
      Status = _GetEPRxStatus(Related_Endpoint);
    }

    if ((rEP >= pDev->Total_Endpoint) || (Status == 0)
        || (pInformation->Current_Configuration == 0))
    {
      return USB_UNSUPPORT;
    }


    if (wIndex0 & 0x80)
    {
      /* IN endpoint */
      if (_GetTxStallStatus(Related_Endpoint ))
      {
        ClearDTOG_TX(Related_Endpoint);
        SetEPTxStatus(Related_Endpoint, EP_TX_VALID);
      }
    }
    else
    {
      /* OUT endpoint */
      if (_GetRxStallStatus(Related_Endpoint))
      {
        if (Related_Endpoint == ENDP0)
        {
          /* After clear the STALL, enable the default endpoint receiver */
          SetEPRxCount(Related_Endpoint, Device_Property.MaxPacketSize);
          _SetEPRxStatus(Related_Endpoint, EP_RX_VALID);
        }
        else
        {
          ClearDTOG_RX(Related_Endpoint);
          _SetEPRxStatus(Related_Endpoint, EP_RX_VALID);
        }
      }
    }
    pUser_Standard_Requests->User_ClearFeature();
    return USB_SUCCESS;
  }

  return USB_UNSUPPORT;
}

/**
  * Function Name  : Standard_SetEndPointFeature
  * Description    : Set or enable a specific feature of EndPoint
  * Input          : None.
  * Output         : None.
  * Return         : - Return USB_SUCCESS, if the request is performed.
  *                  - Return USB_UNSUPPORT, if the request is invalid.
  */
RESULT Standard_SetEndPointFeature(void)
{
  uint32_t    wIndex0;
  uint32_t    Related_Endpoint;
  uint32_t    rEP;
  uint32_t    Status;

  wIndex0 = pInformation->USBwIndex0;
  rEP = wIndex0 & ~0x80;
  Related_Endpoint = ENDP0 + rEP;

  if (ValBit(pInformation->USBwIndex0, 7))
  {
    /* get Status of endpoint & stall the request if the related_ENdpoint
    is Disabled*/
    Status = _GetEPTxStatus(Related_Endpoint);
  }
  else
  {
    Status = _GetEPRxStatus(Related_Endpoint);
  }

  if (Related_Endpoint >= Device_Table.Total_Endpoint
      || pInformation->USBwValue != 0 || Status == 0
      || pInformation->Current_Configuration == 0)
  {
    return USB_UNSUPPORT;
  }
  else
  {
    if (wIndex0 & 0x80)
    {
      /* IN endpoint */
      _SetEPTxStatus(Related_Endpoint, EP_TX_STALL);
    }

    else
    {
      /* OUT endpoint */
      _SetEPRxStatus(Related_Endpoint, EP_RX_STALL);
    }
  }
  pUser_Standard_Requests->User_SetEndPointFeature();
  return USB_SUCCESS;
}

/**
  * Function Name  : Standard_SetDeviceFeature.
  * Description    : Set or enable a specific feature of Device.
  * Input          : None.
  * Output         : None.
  * Return         : - Return USB_SUCCESS, if the request is performed.
  *                  - Return USB_UNSUPPORT, if the request is invalid.
  */
RESULT Standard_SetDeviceFeature(void)
{
  SetBit(pInformation->Current_Feature, 5);
  pUser_Standard_Requests->User_SetDeviceFeature();
  return USB_SUCCESS;
}

/**
  * Function Name  : Standard_GetDescriptorData.
  * Description    : Standard_GetDescriptorData is used for descriptors transfer.
  *                : This routine is used for the descriptors resident in Flash
  *                  or RAM
  *                  pDesc can be in either Flash or RAM
  *                  The purpose of this routine is to have a versatile way to
  *                  response descriptors request. It allows user to generate
  *                  certain descriptors with software or read descriptors from
  *                  external storage part by part.
  * Input          : - Length - Length of the data in this transfer.
  *                  - pDesc - A pointer points to descriptor struct.
  *                  The structure gives the initial address of the descriptor and
  *                  its original size.
  * Output         : None.
  * Return         : Address of a part of the descriptor pointed by the Usb_
  *                  wOffset The buffer pointed by this address contains at least
  *                  Length bytes.
*/
uint8_t *Standard_GetDescriptorData(uint16_t Length, ONE_DESCRIPTOR *pDesc)
{
  uint32_t  wOffset;

  wOffset = pInformation->Ctrl_Info.Usb_wOffset;
  if (Length == 0)
  {
    pInformation->Ctrl_Info.Usb_wLength = pDesc->Descriptor_Size - wOffset;
    return 0;
  }

  return pDesc->Descriptor + wOffset;
}

/**
  * Function Name  : DataStageOut.
  * Description    : Data stage of a Control Write Transfer.
  * Input          : None.
  * Output         : None.
  * Return         : None.
  */
void DataStageOut(void)
{
  ENDPOINT_INFO *pEPinfo = &pInformation->Ctrl_Info;
  uint32_t save_rLength;

  save_rLength = pEPinfo->Usb_rLength;

  if (pEPinfo->CopyData && save_rLength)
  {
    uint8_t *Buffer;
    uint32_t Length;

    Length = pEPinfo->PacketSize;
    if (Length > save_rLength)
    {
      Length = save_rLength;
    }

    Buffer = (*pEPinfo->CopyData)(Length);
    pEPinfo->Usb_rLength -= Length;
    pEPinfo->Usb_rOffset += Length;
    PMAToUserBufferCopy(Buffer, GetEPRxAddr(ENDP0), Length);

  }

  if (pEPinfo->Usb_rLength != 0)
  {
    vSetEPRxStatus(EP_RX_VALID);/* re-enable for next data reception */
    SetEPTxCount(ENDP0, 0);
    vSetEPTxStatus(EP_TX_VALID);/* Expect the host to abort the data OUT stage */
  }
  /* Set the next State*/
  if (pEPinfo->Usb_rLength >= pEPinfo->PacketSize)
  {
    pInformation->ControlState = OUT_DATA;
  }
  else
  {
    if (pEPinfo->Usb_rLength > 0)
    {
      pInformation->ControlState = LAST_OUT_DATA;
    }
    else if (pEPinfo->Usb_rLength == 0)
    {
      /* USB spec: section 8.5.3.1 Reporting Status Results */
      pInformation->ControlState = WAIT_STATUS_IN;
      (*pProperty->Process_Status_IN)();      
      if (pInformation->ControlState == STALLED)
      {
        /* command failed to complete: 
        in this case we should return a STALL */
        vSetEPRxStatus(EP_RX_STALL);
        vSetEPTxStatus(EP_TX_STALL);
      }
      /* command completed successfully: 
      send a zero-length packet during status stage */
      else USB_StatusIn();
    }
  }
}

/**
  * Function Name  : DataStageIn.
  * Description    : Data stage of a Control Read Transfer.
  * Input          : None.
  * Output         : None.
  * Return         : None.
  */
void DataStageIn(void)
{
  ENDPOINT_INFO *pEPinfo = &pInformation->Ctrl_Info;
  uint32_t save_wLength = pEPinfo->Usb_wLength;
  uint32_t ControlState = pInformation->ControlState;

  uint8_t *DataBuffer;
  uint32_t Length;

  if ((save_wLength == 0) && (ControlState == LAST_IN_DATA))
  {
    if(Data_Mul_MaxPacketSize == TRUE)
    {
      /* No more data to send and empty packet */
      Send0LengthData();
      ControlState = LAST_IN_DATA;
      Data_Mul_MaxPacketSize = FALSE;
    }
    else 
    {
      /* No more data to send so STALL the TX Status*/
      ControlState = WAIT_STATUS_OUT;
      vSetEPTxStatus(EP_TX_STALL);
 
    }
    
    goto Expect_Status_Out;
  }

  Length = pEPinfo->PacketSize;
  ControlState = (save_wLength <= Length) ? LAST_IN_DATA : IN_DATA;

  if (Length > save_wLength)
  {
    Length = save_wLength;
  }

  DataBuffer = (*pEPinfo->CopyData)(Length);
  
  UserToPMABufferCopy(DataBuffer, GetEPTxAddr(ENDP0), Length);

  SetEPTxCount(ENDP0, Length);

  pEPinfo->Usb_wLength -= Length;
  pEPinfo->Usb_wOffset += Length;
  vSetEPTxStatus(EP_TX_VALID);

  USB_StatusOut();/* Expect the host to abort the data IN stage */

Expect_Status_Out:
  pInformation->ControlState = ControlState;
}

/**
  * Function Name  : NoData_Setup0.
  * Description    : Proceed the processing of setup request without data stage.
  * Input          : None.
  * Output         : None.
  * Return         : None.
  */
void NoData_Setup0(void)
{
  RESULT Result = USB_UNSUPPORT;
  uint32_t RequestNo = pInformation->USBbRequest;
  uint32_t ControlState;

  if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT))
  {
    /* Device Request*/
    /* SET_CONFIGURATION*/
    if (RequestNo == SET_CONFIGURATION)
    {
      Result = Standard_SetConfiguration();
    }

    /*SET ADDRESS*/
    else if (RequestNo == SET_ADDRESS)
    {
      if ((pInformation->USBwValue0 > 127) || (pInformation->USBwValue1 != 0)
          || (pInformation->USBwIndex != 0)
          || (pInformation->Current_Configuration != 0))
        /* Device Address should be 127 or less*/
      {
        ControlState = STALLED;
        goto exit_NoData_Setup0;
      }
      else
      {
        Result = USB_SUCCESS;
      }
    }
    /*SET FEATURE for Device*/
    else if (RequestNo == SET_FEATURE)
    {
      if ((pInformation->USBwValue0 == DEVICE_REMOTE_WAKEUP) \
          && (pInformation->USBwIndex == 0))
      {
        Result = Standard_SetDeviceFeature();
      }
      else
      {
        Result = USB_UNSUPPORT;
      }
    }
    /*Clear FEATURE for Device */
    else if (RequestNo == CLEAR_FEATURE)
    {
      if (pInformation->USBwValue0 == DEVICE_REMOTE_WAKEUP
          && pInformation->USBwIndex == 0
          && ValBit(pInformation->Current_Feature, 5))
      {
        DevRemoteWakeup = 0;
        Result = Standard_ClearFeature();
      }
      else
      {
        Result = USB_UNSUPPORT;
      }
    }

  }

  /* Interface Request*/
  else if (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
  {
    /*SET INTERFACE*/
    if (RequestNo == SET_INTERFACE)
    {
      Result = Standard_SetInterface();
    }
  }

  /* EndPoint Request*/
  else if (Type_Recipient == (STANDARD_REQUEST | ENDPOINT_RECIPIENT))
  {
    /*CLEAR FEATURE for EndPoint*/
    if (RequestNo == CLEAR_FEATURE)
    {
      Result = Standard_ClearFeature();
    }
    /* SET FEATURE for EndPoint*/
    else if (RequestNo == SET_FEATURE)
    {
      Result = Standard_SetEndPointFeature();
    }
  }
  else
  {
    Result = USB_UNSUPPORT;
  }


  if (Result != USB_SUCCESS)
  {
    Result = (*pProperty->Class_NoData_Setup)(RequestNo);
    if (Result == USB_NOT_READY)
    {
      ControlState = PAUSE;
      goto exit_NoData_Setup0;
    }
  }

  if (Result != USB_SUCCESS)
  {
    ControlState = STALLED;
    goto exit_NoData_Setup0;
  }

  ControlState = WAIT_STATUS_IN;/* After no data stage SETUP */

  USB_StatusIn();

exit_NoData_Setup0:
  pInformation->ControlState = ControlState;
  return;
}

/**
  * Function Name  : Data_Setup0.
  * Description    : Proceed the processing of setup request with data stage.
  * Input          : None.
  * Output         : None.
  * Return         : None.
  */
void Data_Setup0(void)
{
  uint8_t *(*CopyRoutine)(uint16_t);
  RESULT Result;
  uint32_t Request_No = pInformation->USBbRequest;

  uint32_t Related_Endpoint, Reserved;
  uint32_t wOffset, Status;



  CopyRoutine = NULL;
  wOffset = 0;

  /*GET DESCRIPTOR*/
  if (Request_No == GET_DESCRIPTOR)
  {
    if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT))
    {
      uint8_t wValue1 = pInformation->USBwValue1;
      if (wValue1 == DEVICE_DESCRIPTOR)
      {
        CopyRoutine = pProperty->GetDeviceDescriptor;
      }
#ifdef LPM_ENABLED
      else if (wValue1 == DEVICE_BOS_DESCRIPTOR)
      {
        CopyRoutine = pProperty->GetBosDescriptor;
      }
#endif
      else if (wValue1 == CONFIG_DESCRIPTOR)
      {
        CopyRoutine = pProperty->GetConfigDescriptor;
      }
      else if (wValue1 == STRING_DESCRIPTOR)
      {
        CopyRoutine = pProperty->GetStringDescriptor;
      }  /* End of GET_DESCRIPTOR */
    }
  }

  /*GET STATUS*/
  else if ((Request_No == GET_STATUS) && (pInformation->USBwValue == 0)
           && (pInformation->USBwLength == 0x0002)
           && (pInformation->USBwIndex1 == 0))
  {
    /* GET STATUS for Device*/
    if ((Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT))
        && (pInformation->USBwIndex == 0))
    {
      CopyRoutine = Standard_GetStatus;
    }

    /* GET STATUS for Interface*/
    else if (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
    {
      if (((*pProperty->Class_Get_Interface_Setting)(pInformation->USBwIndex0, 0) == USB_SUCCESS)
          && (pInformation->Current_Configuration != 0))
      {
        CopyRoutine = Standard_GetStatus;
      }
    }

    /* GET STATUS for EndPoint*/
    else if (Type_Recipient == (STANDARD_REQUEST | ENDPOINT_RECIPIENT))
    {
      Related_Endpoint = (pInformation->USBwIndex0 & 0x0f);
      Reserved = pInformation->USBwIndex0 & 0x70;

      if (ValBit(pInformation->USBwIndex0, 7))
      {
        /*Get Status of endpoint & stall the request if the related_ENdpoint
        is Disabled*/
        Status = _GetEPTxStatus(Related_Endpoint);
      }
      else
      {
        Status = _GetEPRxStatus(Related_Endpoint);
      }

      if ((Related_Endpoint < Device_Table.Total_Endpoint) && (Reserved == 0)
          && (Status != 0))
      {
        CopyRoutine = Standard_GetStatus;
      }
    }

  }

  /*GET CONFIGURATION*/
  else if (Request_No == GET_CONFIGURATION)
  {
    if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT))
    {
      CopyRoutine = Standard_GetConfiguration;
    }
  }
  /*GET INTERFACE*/
  else if (Request_No == GET_INTERFACE)
  {
    if ((Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
        && (pInformation->Current_Configuration != 0) && (pInformation->USBwValue == 0)
        && (pInformation->USBwIndex1 == 0) && (pInformation->USBwLength == 0x0001)
        && ((*pProperty->Class_Get_Interface_Setting)(pInformation->USBwIndex0, 0) == USB_SUCCESS))
    {
      CopyRoutine = Standard_GetInterface;
    }

  }
  
  if (CopyRoutine)
  {
    pInformation->Ctrl_Info.Usb_wOffset = wOffset;
    pInformation->Ctrl_Info.CopyData = CopyRoutine;
    /* sb in the original the cast to word was directly */
    /* now the cast is made step by step */
    (*CopyRoutine)(0);
    Result = USB_SUCCESS;
  }
  else
  {
    Result = (*pProperty->Class_Data_Setup)(pInformation->USBbRequest);
    if (Result == USB_NOT_READY)
    {
      pInformation->ControlState = PAUSE;
      return;
    }
  }

  if (pInformation->Ctrl_Info.Usb_wLength == 0xFFFF)
  {
    /* Data is not ready, wait it */
    pInformation->ControlState = PAUSE;
    return;
  }
  if ((Result == USB_UNSUPPORT) || (pInformation->Ctrl_Info.Usb_wLength == 0))
  {
    /* Unsupported request */
    pInformation->ControlState = STALLED;
    return;
  }


  if (ValBit(pInformation->USBbmRequestType, 7))
  {
    /* Device ==> Host */
    __IO uint32_t wLength = pInformation->USBwLength;
     
    /* Restrict the data length to be the one host asks for */
    if (pInformation->Ctrl_Info.Usb_wLength > wLength)
    {
      pInformation->Ctrl_Info.Usb_wLength = wLength;
    }
    
    else if (pInformation->Ctrl_Info.Usb_wLength < pInformation->USBwLength)
    {
      if (pInformation->Ctrl_Info.Usb_wLength < pProperty->MaxPacketSize)
      {
        Data_Mul_MaxPacketSize = FALSE;
      }
      else if ((pInformation->Ctrl_Info.Usb_wLength % pProperty->MaxPacketSize) == 0)
      {
        Data_Mul_MaxPacketSize = TRUE;
      }
    }   

    pInformation->Ctrl_Info.PacketSize = pProperty->MaxPacketSize;
    DataStageIn();
  }
  else
  {
    pInformation->ControlState = OUT_DATA;
    vSetEPRxStatus(EP_RX_VALID); /* enable for next data reception */
  }

  return;
}

/**
  * Function Name  : Setup0_Process
  * Description    : Get the device request data and dispatch to individual process.
  * Input          : None.
  * Output         : None.
  * Return         : Post0_Process.
  */
uint8_t Setup0_Process(void)
{

  union
  {
    uint8_t* b;
    uint16_t* w;
  } pBuf;
#if defined AIR32F303xE || defined AIR32F302x8 
  uint16_t offset = 0;
  pBuf.b = (uint8_t *)( PMAAddr + _GetEPRxAddr(ENDP0));
#else  
  uint16_t offset = 1;
  
  pBuf.b = PMAAddr + (uint8_t *)(_GetEPRxAddr(ENDP0) * 2); /* *2 for 32 bits addr */
#endif
  if (pInformation->ControlState != PAUSE)
  {
    pInformation->USBbmRequestType = *pBuf.b++; /* bmRequestType */
    pInformation->USBbRequest = *pBuf.b++; /* bRequest */
    pBuf.w += offset;  /* word not accessed because of 32 bits addressing */
    pInformation->USBwValue = ByteSwap(*pBuf.w++); /* wValue */
    pBuf.w += offset;  /* word not accessed because of 32 bits addressing */
    pInformation->USBwIndex  = ByteSwap(*pBuf.w++); /* wIndex */
    pBuf.w += offset;  /* word not accessed because of 32 bits addressing */
    pInformation->USBwLength = *pBuf.w; /* wLength */
  }

  pInformation->ControlState = SETTING_UP;
  if (pInformation->USBwLength == 0)
  {
    /* Setup with no data stage */
    NoData_Setup0();
  }
  else
  {
    /* Setup with data stage */
    Data_Setup0();
  }
  return Post0_Process();
}

/**
  * Function Name  : In0_Process
  * Description    : Process the IN token on all default endpoint.
  * Input          : None.      
  * Output         : None.
  * Return         : Post0_Process.
  */
uint8_t In0_Process(void)
{
  uint32_t ControlState = pInformation->ControlState;

  if ((ControlState == IN_DATA) || (ControlState == LAST_IN_DATA))
  {
    DataStageIn();
    /* ControlState may be changed outside the function */
    ControlState = pInformation->ControlState;
  }

  else if (ControlState == WAIT_STATUS_IN)
  {
    if ((pInformation->USBbRequest == SET_ADDRESS) &&
        (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT)))
    {
      SetDeviceAddress(pInformation->USBwValue0);
      pUser_Standard_Requests->User_SetDeviceAddress();
    }
    (*pProperty->Process_Status_IN)();
    ControlState = STALLED;
  }

  else
  {
    ControlState = STALLED;
  }

  pInformation->ControlState = ControlState;

  return Post0_Process();
}

/**
  * Function Name  : Out0_Process
  * Description    : Process the OUT token on all default endpoint.
  * Input          : None.
  * Output         : None.
  * Return         : Post0_Process.
  */
uint8_t Out0_Process(void)
{
  uint32_t ControlState = pInformation->ControlState;

  if ((ControlState == IN_DATA) || (ControlState == LAST_IN_DATA))
  {
    /* host aborts the transfer before finish */
    ControlState = STALLED;
  }
  else if ((ControlState == OUT_DATA) || (ControlState == LAST_OUT_DATA))
  {
    DataStageOut();
    ControlState = pInformation->ControlState; /* may be changed outside the function */
  }

  else if (ControlState == WAIT_STATUS_OUT)
  {
    (*pProperty->Process_Status_OUT)();
    ControlState = STALLED;
  }


  /* Unexpect state, STALL the endpoint */
  else
  {
    ControlState = STALLED;
  }

  pInformation->ControlState = ControlState;

  return Post0_Process();
}

/**
  * Function Name  : Post0_Process
  * Description    : Stall the Endpoint 0 in case of error.
  * Input          : None.
  * Output         : None.
  * Return         : - 0 if the control State is in PAUSE
  *                  - 1 if not.
  */
uint8_t Post0_Process(void)
{
   
  SetEPRxCount(ENDP0, Device_Property.MaxPacketSize);

  if (pInformation->ControlState == STALLED)
  {
    vSetEPRxStatus(EP_RX_STALL);
    vSetEPTxStatus(EP_TX_STALL);
  }

  return (pInformation->ControlState == PAUSE);
}

/**
  * Function Name  : SetDeviceAddress.
  * Description    : Set the device and all the used Endpoints addresses.
  * Input          : - Val: device address.
  * Output         : None.
  * Return         : None.
  */
void SetDeviceAddress(uint8_t Val)
{
  uint32_t i;
  uint32_t nEP = Device_Table.Total_Endpoint;

  /* set address in every used endpoint */
  for (i = 0; i < nEP; i++)
  {
    _SetEPAddress((uint8_t)i, (uint8_t)i);
  } /* for */
  _SetDADDR(Val | DADDR_EF); /* set device address and enable function */ 
}

/**
  * Function Name  : NOP_Process
  * Description    : No operation function.
  * Input          : None.
  * Output         : None.
  * Return         : None.
  */
void NOP_Process(void)
{
}
