/** Routine to receive the current CSW from the device.
*
* \param[out] SCSICommandStatus Pointer to a destination where the returned status data should be stored
*
* \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
*/
static uint8_t MassStore_GetReturnedStatus(CommandStatusWrapper_t* const SCSICommandStatus)
{
uint8_t ErrorCode = PIPE_RWSTREAM_NoError;
/* If an error in the command occurred, abort */
if ((ErrorCode = MassStore_WaitForDataReceived()) != PIPE_RWSTREAM_NoError)
return ErrorCode;
/* Select the IN data pipe for data reception */
Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);
Pipe_Unfreeze();
/* Load in the CSW from the attached device */
if ((ErrorCode = Pipe_Read_Stream_LE(SCSICommandStatus, sizeof(CommandStatusWrapper_t))) != PIPE_RWSTREAM_NoError)
return ErrorCode;
/* Clear the data ready for next reception */
Pipe_ClearIN();
/* Freeze the IN pipe after use */
Pipe_Freeze();
/* Check to see if command failed */
if (SCSICommandStatus->Status != Command_Pass)
ErrorCode = MASS_STORE_SCSI_COMMAND_FAILED;
return ErrorCode;
}
/** Sends or receives the transaction's data stage to or from the attached device, reading or
* writing to the nominated buffer.
*
* \param[in] SCSICommandBlock Pointer to a SCSI command block structure being sent to the attached device
* \param[in,out] BufferPtr Pointer to the data buffer to read from or write to
*
* \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
*/
static uint8_t MassStore_SendReceiveData(CommandBlockWrapper_t* const SCSICommandBlock,
void* BufferPtr)
{
uint8_t ErrorCode = PIPE_RWSTREAM_NoError;
uint16_t BytesRem = SCSICommandBlock->DataTransferLength;
/* Check the direction of the SCSI command data stage */
if (SCSICommandBlock->Flags & COMMAND_DIRECTION_DATA_IN)
{
/* Wait until the device has replied with some data */
if ((ErrorCode = MassStore_WaitForDataReceived()) != PIPE_RWSTREAM_NoError)
return ErrorCode;
/* Select the IN data pipe for data reception */
Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);
Pipe_Unfreeze();
/* Read in the block data from the pipe */
if ((ErrorCode = Pipe_Read_Stream_LE(BufferPtr, BytesRem)) != PIPE_RWSTREAM_NoError)
return ErrorCode;
/* Acknowledge the packet */
Pipe_ClearIN();
}
else
{
/* Select the OUT data pipe for data transmission */
Pipe_SelectPipe(MASS_STORE_DATA_OUT_PIPE);
Pipe_Unfreeze();
/* Write the block data to the pipe */
if ((ErrorCode = Pipe_Write_Stream_LE(BufferPtr, BytesRem)) != PIPE_RWSTREAM_NoError)
return ErrorCode;
/* Acknowledge the packet */
Pipe_ClearOUT();
while (!(Pipe_IsOUTReady()))
{
if (USB_HostState == HOST_STATE_Unattached)
return PIPE_RWSTREAM_DeviceDisconnected;
}
}
/* Freeze used pipe after use */
Pipe_Freeze();
return PIPE_RWSTREAM_NoError;
}
/** Routine to receive the current CSW from the device.
*
* \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
*/
static uint8_t MassStore_GetReturnedStatus(void)
{
uint8_t ErrorCode = PIPE_RWSTREAM_NoError;
/* If an error in the command ocurred, abort */
if ((ErrorCode = MassStore_WaitForDataReceived()) != PIPE_RWSTREAM_NoError)
return ErrorCode;
/* Select the IN data pipe for data reception */
Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);
Pipe_Unfreeze();
/* Load in the CSW from the attached device */
if ((ErrorCode = Pipe_Read_Stream_LE(&SCSICommandStatus, sizeof(CommandStatusWrapper_t))) != PIPE_RWSTREAM_NoError)
return ErrorCode;
/* Clear the data ready for next reception */
Pipe_ClearIN();
/* Freeze the IN pipe after use */
Pipe_Freeze();
return PIPE_RWSTREAM_NoError;
}
