MassStoreCommands.c 23.2 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635
/*
             LUFA Library
     Copyright (C) Dean Camera, 2017.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaims all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Mass Storage Device commands, to issue MSD commands to the device for
 *  reading device status, capacity, and other characteristics. This file
 *  also contains block read and write functions, so that device blocks
 *  can be read and written. In general, these functions would be chained
 *  to a FAT library to give file-level access to an attached device's contents.
 *
 *  \note Many Mass Storage devices on the market are non-compliant to the
 *        specifications and thus can prove difficult to interface with. It
 *        may be necessary to retry the functions in the module several times
 *        after they have returned and error to successfully send the command
 *        to the device. Some devices may also need to have the stream function
 *        timeout period extended beyond 100ms (some badly designed devices exceeding
 *        1.5 seconds occasionally) by defining USB_STREAM_TIMEOUT_MS to a
 *        larger value in the project makefile and passing it to the compiler
 *        via the -D switch.
 */

#define  INCLUDE_FROM_MASSSTORE_COMMANDS_C
#include "MassStoreCommands.h"

/** Current Tag value used in issued CBWs to the device. This is automatically incremented
 *  each time a command is sent, and is not externally accessible.
 */
static uint32_t MassStore_Tag = 1;


/** Routine to send the current CBW to the device, and increment the Tag value as needed.
 *
 *  \param[in] SCSICommandBlock  Pointer to a SCSI command block structure to send to the attached device
 *  \param[in,out] BufferPtr     Pointer to a buffer for the data to send or receive to/from the device, or NULL if no data
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
 */
static uint8_t MassStore_SendCommand(MS_CommandBlockWrapper_t* const SCSICommandBlock,
                                     void* BufferPtr)
{
	uint8_t ErrorCode = PIPE_RWSTREAM_NoError;

	/* Wrap Tag value when invalid - MS class defines tag values of 0 and 0xFFFFFFFF to be invalid */
	if (++MassStore_Tag == 0xFFFFFFFF)
	  MassStore_Tag = 1;

	/* Each transmission should have a unique tag value, increment before use */
	SCSICommandBlock->Tag = MassStore_Tag;

	/* Select the OUT data pipe for CBW transmission */
	Pipe_SelectPipe(MASS_STORE_DATA_OUT_PIPE);
	Pipe_Unfreeze();

	/* Write the CBW command to the OUT pipe */
	if ((ErrorCode = Pipe_Write_Stream_LE(SCSICommandBlock, sizeof(MS_CommandBlockWrapper_t), NULL)) !=
	                                      PIPE_RWSTREAM_NoError)
	{
		Pipe_Freeze();
		return ErrorCode;
	}

	/* Send the data in the OUT pipe to the attached device */
	Pipe_ClearOUT();

	/* Wait until command has been sent */
	Pipe_WaitUntilReady();

	/* Freeze pipe after use */
	Pipe_Freeze();

	if (BufferPtr != NULL)
	{
		/* Transfer the requested data (if any) to or from the device */
		ErrorCode = MassStore_SendReceiveData(SCSICommandBlock, (void*)BufferPtr);

		/* Only fail completely if the transfer fails without a STALL, as a logical STALL can be recovered from */
		if ((ErrorCode != PIPE_RWSTREAM_NoError) && (ErrorCode != PIPE_RWSTREAM_PipeStalled))
		{
			Pipe_Freeze();
			return ErrorCode;
		}
	}

	/* Retrieve the returned SCSI status from the device */
	MS_CommandStatusWrapper_t SCSIStatusBlock;
	return MassStore_GetReturnedStatus(&SCSIStatusBlock);
}

/** Waits until the attached device is ready to accept data following a CBW, checking
 *  to ensure that the device has not stalled the transaction.
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
 */
static uint8_t MassStore_WaitForDataReceived(void)
{
	uint16_t TimeoutMSRem        = COMMAND_DATA_TIMEOUT_MS;
	uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();

	/* Select the IN data pipe for data reception */
	Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);
	Pipe_Unfreeze();

	/* Wait until data received in the IN pipe */
	while (!(Pipe_IsINReceived()))
	{
		uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();

		/* Check to see if a new frame has been issued (1ms elapsed) */
		if (CurrentFrameNumber != PreviousFrameNumber)
		{
			/* Save the new frame number and decrement the timeout period */
			PreviousFrameNumber = CurrentFrameNumber;
			TimeoutMSRem--;

			/* Check to see if the timeout period for the command has elapsed */
			if (!(TimeoutMSRem))
			  return PIPE_RWSTREAM_Timeout;
		}

		Pipe_Freeze();
		Pipe_SelectPipe(MASS_STORE_DATA_OUT_PIPE);
		Pipe_Unfreeze();

		/* Check if pipe stalled (command failed by device) */
		if (Pipe_IsStalled())
		{
			/* Clear the stall condition on the OUT pipe */
			USB_Host_ClearEndpointStall(Pipe_GetBoundEndpointAddress());

			return PIPE_RWSTREAM_PipeStalled;
		}

		Pipe_Freeze();
		Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);
		Pipe_Unfreeze();

		/* Check if pipe stalled (command failed by device) */
		if (Pipe_IsStalled())
		{
			/* Clear the stall condition on the IN pipe */
			USB_Host_ClearEndpointStall(Pipe_GetBoundEndpointAddress());

			return PIPE_RWSTREAM_PipeStalled;
		}

		/* Check to see if the device was disconnected, if so exit function */
		if (USB_HostState == HOST_STATE_Unattached)
		  return PIPE_RWSTREAM_DeviceDisconnected;
	};

	Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);
	Pipe_Freeze();

	Pipe_SelectPipe(MASS_STORE_DATA_OUT_PIPE);
	Pipe_Freeze();

	return PIPE_RWSTREAM_NoError;
}

/** 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(MS_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 & MS_COMMAND_DIR_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, NULL)) != 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, NULL)) != 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.
 *
 *  \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(MS_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(MS_CommandStatusWrapper_t), NULL)) !=
	                                     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 != MS_SCSI_COMMAND_Pass)
	  ErrorCode = MASS_STORE_SCSI_COMMAND_FAILED;

	return ErrorCode;
}

/** Issues a Mass Storage class specific request to reset the attached device's Mass Storage interface,
 *  readying the device for the next CBW. The Data endpoints are cleared of any STALL condition once this
 *  command completes successfully.
 *
 *  \return A value from the USB_Host_SendControlErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_MassStorageReset(void)
{
	uint8_t ErrorCode;

	USB_ControlRequest = (USB_Request_Header_t)
		{
			.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
			.bRequest      = MS_REQ_MassStorageReset,
			.wValue        = 0,
			.wIndex        = 0,
			.wLength       = 0,
		};

	/* Select the control pipe for the request transfer */
	Pipe_SelectPipe(PIPE_CONTROLPIPE);

	if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
	  return ErrorCode;

	/* Select first data pipe to clear STALL condition if one exists */
	Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);

	if ((ErrorCode = USB_Host_ClearEndpointStall(Pipe_GetBoundEndpointAddress())) != HOST_SENDCONTROL_Successful)
	  return ErrorCode;

	/* Select second data pipe to clear STALL condition if one exists */
	Pipe_SelectPipe(MASS_STORE_DATA_OUT_PIPE);

	if ((ErrorCode = USB_Host_ClearEndpointStall(Pipe_GetBoundEndpointAddress())) != HOST_SENDCONTROL_Successful)
	  return ErrorCode;

	return HOST_SENDCONTROL_Successful;
}

/** Issues a Mass Storage class specific request to determine the index of the highest numbered Logical
 *  Unit in the attached device.
 *
 *  \note Some devices do not support this request, and will STALL it when issued. To get around this,
 *        on unsupported devices the max LUN index will be reported as zero and no error will be returned
 *        if the device STALLs the request.
 *
 *  \param[out] MaxLUNIndex  Pointer to the location that the maximum LUN index value should be stored
 *
 *  \return A value from the USB_Host_SendControlErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_GetMaxLUN(uint8_t* const MaxLUNIndex)
{
	uint8_t ErrorCode;

	USB_ControlRequest = (USB_Request_Header_t)
		{
			.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
			.bRequest      = MS_REQ_GetMaxLUN,
			.wValue        = 0,
			.wIndex        = 0,
			.wLength       = 1,
		};

	/* Select the control pipe for the request transfer */
	Pipe_SelectPipe(PIPE_CONTROLPIPE);

	if ((ErrorCode = USB_Host_SendControlRequest(MaxLUNIndex)) == HOST_SENDCONTROL_SetupStalled)
	{
		/* Clear the pipe stall */
		Pipe_ClearStall();

		/* Some faulty Mass Storage devices don't implement the GET_MAX_LUN request, so assume a single LUN */
		*MaxLUNIndex = 0;

		/* Clear the error, and pretend the request executed correctly if the device STALLed it */
		ErrorCode = HOST_SENDCONTROL_Successful;
	}

	return ErrorCode;
}

/** Issues a SCSI Inquiry command to the attached device, to determine the device's information. This
 *  gives information on the device's capabilities.
 *
 *  \param[in] LUNIndex    Index of the LUN inside the device the command is being addressed to
 *  \param[out] InquiryPtr  Pointer to the inquiry data structure where the inquiry data from the device is to be stored
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_Inquiry(const uint8_t LUNIndex,
                          SCSI_Inquiry_Response_t* const InquiryPtr)
{
	/* Create a CBW with a SCSI command to issue INQUIRY command */
	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
		{
			.Signature          = MS_CBW_SIGNATURE,
			.DataTransferLength = sizeof(SCSI_Inquiry_Response_t),
			.Flags              = MS_COMMAND_DIR_DATA_IN,
			.LUN                = LUNIndex,
			.SCSICommandLength  = 6,
			.SCSICommandData    =
				{
					SCSI_CMD_INQUIRY,
					0x00,                   // Reserved
					0x00,                   // Reserved
					0x00,                   // Reserved
					sizeof(SCSI_Inquiry_Response_t), // Allocation Length
					0x00                    // Unused (control)
				}
		};

	/* Send the command and any data to the attached device */
	return MassStore_SendCommand(&SCSICommandBlock, InquiryPtr);
}

/** Issues a SCSI Request Sense command to the attached device, to determine the current SCSI sense information. This
 *  gives error codes for the last issued SCSI command to the device.
 *
 *  \param[in] LUNIndex   Index of the LUN inside the device the command is being addressed to
 *  \param[out] SensePtr  Pointer to the sense data structure where the sense data from the device is to be stored
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_RequestSense(const uint8_t LUNIndex,
                               SCSI_Request_Sense_Response_t* const SensePtr)
{
	/* Create a CBW with a SCSI command to issue REQUEST SENSE command */
	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
		{
			.Signature          = MS_CBW_SIGNATURE,
			.DataTransferLength = sizeof(SCSI_Request_Sense_Response_t),
			.Flags              = MS_COMMAND_DIR_DATA_IN,
			.LUN                = LUNIndex,
			.SCSICommandLength  = 6,
			.SCSICommandData =
				{
					SCSI_CMD_REQUEST_SENSE,
					0x00,                   // Reserved
					0x00,                   // Reserved
					0x00,                   // Reserved
					sizeof(SCSI_Request_Sense_Response_t), // Allocation Length
					0x00                    // Unused (control)
				}
		};

	/* Send the command and any data to the attached device */
	return MassStore_SendCommand(&SCSICommandBlock, SensePtr);
}

/** Issues a SCSI Device Block Read command to the attached device, to read in one or more data blocks from the
 *  storage medium into a buffer.
 *
 *  \param[in] LUNIndex      Index of the LUN inside the device the command is being addressed to
 *  \param[in] BlockAddress  Start block address to read from
 *  \param[in] Blocks        Number of blocks to read from the device
 *  \param[in] BlockSize     Size in bytes of each block to read
 *  \param[out] BufferPtr    Pointer to the buffer where the read data is to be written to
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_ReadDeviceBlock(const uint8_t LUNIndex,
                                  const uint32_t BlockAddress,
                                  const uint8_t Blocks,
                                  const uint16_t BlockSize,
                                  void* BufferPtr)
{
	/* Create a CBW with a SCSI command to read in the given blocks from the device */
	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
		{
			.Signature          = MS_CBW_SIGNATURE,
			.DataTransferLength = ((uint32_t)Blocks * BlockSize),
			.Flags              = MS_COMMAND_DIR_DATA_IN,
			.LUN                = LUNIndex,
			.SCSICommandLength  = 10,
			.SCSICommandData    =
				{
					SCSI_CMD_READ_10,
					0x00,                   // Unused (control bits, all off)
					(BlockAddress >> 24),   // MSB of Block Address
					(BlockAddress >> 16),
					(BlockAddress >> 8),
					(BlockAddress & 0xFF),  // LSB of Block Address
					0x00,                   // Reserved
					0x00,                   // MSB of Total Blocks to Read
					Blocks,                 // LSB of Total Blocks to Read
					0x00                    // Unused (control)
				}
		};

	/* Send the command and any data to the attached device */
	return MassStore_SendCommand(&SCSICommandBlock, BufferPtr);
}

/** Issues a SCSI Device Block Write command to the attached device, to write one or more data blocks to the
 *  storage medium from a buffer.
 *
 *  \param[in] LUNIndex      Index of the LUN inside the device the command is being addressed to
 *  \param[in] BlockAddress  Start block address to write to
 *  \param[in] Blocks        Number of blocks to write to in the device
 *  \param[in] BlockSize     Size in bytes of each block to write
 *  \param[in] BufferPtr     Pointer to the buffer where the write data is to be sourced from
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_WriteDeviceBlock(const uint8_t LUNIndex,
                                   const uint32_t BlockAddress,
                                   const uint8_t Blocks,
                                   const uint16_t BlockSize,
                                   void* BufferPtr)
{
	/* Create a CBW with a SCSI command to write the given blocks to the device */
	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
		{
			.Signature          = MS_CBW_SIGNATURE,
			.DataTransferLength = ((uint32_t)Blocks * BlockSize),
			.Flags              = MS_COMMAND_DIR_DATA_OUT,
			.LUN                = LUNIndex,
			.SCSICommandLength  = 10,
			.SCSICommandData    =
				{
					SCSI_CMD_WRITE_10,
					0x00,                   // Unused (control bits, all off)
					(BlockAddress >> 24),   // MSB of Block Address
					(BlockAddress >> 16),
					(BlockAddress >> 8),
					(BlockAddress & 0xFF),  // LSB of Block Address
					0x00,                   // Unused (reserved)
					0x00,                   // MSB of Total Blocks to Write
					Blocks,                 // LSB of Total Blocks to Write
					0x00                    // Unused (control)
				}
		};

	/* Send the command and any data to the attached device */
	return MassStore_SendCommand(&SCSICommandBlock, BufferPtr);
}

/** Issues a SCSI Device Test Unit Ready command to the attached device, to determine if the device is ready to accept
 *  other commands.
 *
 *  \param[in] LUNIndex      Index of the LUN inside the device the command is being addressed to
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_TestUnitReady(const uint8_t LUNIndex)
{
	/* Create a CBW with a SCSI command to issue TEST UNIT READY command */
	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
		{
			.Signature          = MS_CBW_SIGNATURE,
			.DataTransferLength = 0,
			.Flags              = MS_COMMAND_DIR_DATA_IN,
			.LUN                = LUNIndex,
			.SCSICommandLength  = 6,
			.SCSICommandData    =
				{
					SCSI_CMD_TEST_UNIT_READY,
					0x00,                   // Reserved
					0x00,                   // Reserved
					0x00,                   // Reserved
					0x00,                   // Reserved
					0x00                    // Unused (control)
				}
		};

	/* Send the command and any data to the attached device */
	return MassStore_SendCommand(&SCSICommandBlock, NULL);
}

/** Issues a SCSI Device Read Capacity command to the attached device, to determine the capacity of the
 *  given Logical Unit within the device.
 *
 *  \param[in] LUNIndex      Index of the LUN inside the device the command is being addressed to
 *  \param[out] CapacityPtr  Device capacity structure where the capacity data is to be stored
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_ReadCapacity(const uint8_t LUNIndex,
                               SCSI_Capacity_t* const CapacityPtr)
{
	uint8_t ErrorCode = PIPE_RWSTREAM_NoError;

	/* Create a CBW with a SCSI command to issue READ CAPACITY command */
	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
		{
			.Signature          = MS_CBW_SIGNATURE,
			.DataTransferLength = sizeof(SCSI_Capacity_t),
			.Flags              = MS_COMMAND_DIR_DATA_IN,
			.LUN                = LUNIndex,
			.SCSICommandLength  = 10,
			.SCSICommandData    =
				{
					SCSI_CMD_READ_CAPACITY_10,
					0x00,                   // Reserved
					0x00,                   // MSB of Logical block address
					0x00,
					0x00,
					0x00,                   // LSB of Logical block address
					0x00,                   // Reserved
					0x00,                   // Reserved
					0x00,                   // Partial Medium Indicator
					0x00                    // Unused (control)
				}
		};

	/* Send the command and any data to the attached device */
	if ((ErrorCode = MassStore_SendCommand(&SCSICommandBlock, CapacityPtr)) != PIPE_RWSTREAM_NoError)
	  return ErrorCode;

	/* Endian-correct the read data */
	CapacityPtr->Blocks    = SwapEndian_32(CapacityPtr->Blocks);
	CapacityPtr->BlockSize = SwapEndian_32(CapacityPtr->BlockSize);

	return ErrorCode;
}

/** Issues a SCSI Device Prevent/Allow Medium Removal command to the attached device, to lock the physical media from
 *  being removed. This is a legacy command for SCSI disks with removable storage (such as ZIP disks), but should still
 *  be issued before the first read or write command is sent.
 *
 *  \param[in] LUNIndex        Index of the LUN inside the device the command is being addressed to
 *  \param[in] PreventRemoval  Whether or not the LUN media should be locked to prevent removal or not
 *
 *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
 */
uint8_t MassStore_PreventAllowMediumRemoval(const uint8_t LUNIndex,
                                            const bool PreventRemoval)
{
	/* Create a CBW with a SCSI command to issue PREVENT ALLOW MEDIUM REMOVAL command */
	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
		{
			.Signature          = MS_CBW_SIGNATURE,
			.DataTransferLength = 0,
			.Flags              = MS_COMMAND_DIR_DATA_OUT,
			.LUN                = LUNIndex,
			.SCSICommandLength  = 6,
			.SCSICommandData    =
				{
					SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL,
					0x00,                   // Reserved
					0x00,                   // Reserved
					PreventRemoval,         // Prevent flag
					0x00,                   // Reserved
					0x00                    // Unused (control)
				}
		};

	/* Send the command and any data to the attached device */
	return MassStore_SendCommand(&SCSICommandBlock, NULL);
}