diff options
Diffstat (limited to 'Demos/Host/ClassDriver/MassStorageHost/Lib/MassStoreCommands.c')
| -rw-r--r-- | Demos/Host/ClassDriver/MassStorageHost/Lib/MassStoreCommands.c | 685 |
1 files changed, 0 insertions, 685 deletions
diff --git a/Demos/Host/ClassDriver/MassStorageHost/Lib/MassStoreCommands.c b/Demos/Host/ClassDriver/MassStorageHost/Lib/MassStoreCommands.c deleted file mode 100644 index 95aafca8c..000000000 --- a/Demos/Host/ClassDriver/MassStorageHost/Lib/MassStoreCommands.c +++ /dev/null @@ -1,685 +0,0 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2009.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, and distribute this software
- and its documentation for any purpose and without fee is hereby
- granted, 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 disclaim 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"
-
-/* Globals: */
-/** Current CBW to send to the device. This is automatically filled by the routines
- * in this file and is not externally accessible.
- */
-static CommandBlockWrapper_t SCSICommandBlock;
-
-/** Current CSW received from the device. This is automatically filled by the routines
- * in this file and is externally accessible so that the return codes may be checked.
- */
-CommandStatusWrapper_t SCSICommandStatus;
-
-/** Current Tag value used in issued CBWs to the device. This is automatically incremented
- * by the routines in this file, 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.
- *
- * \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
- */
-static uint8_t MassStore_SendCommand(void)
-{
- uint8_t ErrorCode = PIPE_RWSTREAM_NoError;
-
- /* Each transmission should have a unique tag value, excluding values 0 and 0xFFFFFFFF */
- if (++MassStore_Tag == 0xFFFFFFFF)
- MassStore_Tag = 1;
-
- /* 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(CommandBlockWrapper_t))) != PIPE_RWSTREAM_NoError)
- return ErrorCode;
-
- /* Send the data in the OUT pipe to the attached device */
- Pipe_ClearOUT();
-
- while(!(Pipe_IsOUTReady()));
-
- /* Freeze pipe after use */
- Pipe_Freeze();
-
- return PIPE_RWSTREAM_NoError;
-}
-
-/** 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;
-
- /* Unfreeze the OUT pipe so that it can be checked */
- Pipe_SelectPipe(MASS_STORE_DATA_OUT_PIPE);
- Pipe_Unfreeze();
-
- /* 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()))
- {
- /* Check to see if a new frame has been issued (1ms elapsed) */
- if (USB_INT_HasOccurred(USB_INT_HSOFI))
- {
- /* Clear the flag and decrement the timeout period counter */
- USB_INT_Clear(USB_INT_HSOFI);
- TimeoutMSRem--;
-
- /* Check to see if the timeout period for the command has elapsed */
- if (!(TimeoutMSRem))
- return PIPE_RWSTREAM_Timeout;
- }
-
- Pipe_SelectPipe(MASS_STORE_DATA_OUT_PIPE);
-
- /* Check if pipe stalled (command failed by device) */
- if (Pipe_IsStalled())
- {
- /* Clear the stall condition on the OUT pipe */
- MassStore_ClearPipeStall(MASS_STORE_DATA_OUT_PIPE);
-
- return PIPE_RWSTREAM_PipeStalled;
- }
-
- Pipe_SelectPipe(MASS_STORE_DATA_IN_PIPE);
-
- /* Check if pipe stalled (command failed by device) */
- if (Pipe_IsStalled())
- {
- /* Clear the stall condition on the IN pipe */
- MassStore_ClearPipeStall(MASS_STORE_DATA_IN_PIPE);
-
- return PIPE_RWSTREAM_PipeStalled;
- }
-
- /* Check to see if the device was disconnected, if so exit function */
- if (!(USB_IsConnected))
- return PIPE_RWSTREAM_DeviceDisconnected;
- };
-
- 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 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(void* BufferPtr)
-{
- uint8_t ErrorCode = PIPE_RWSTREAM_NoError;
- uint16_t BytesRem = SCSICommandBlock.Header.DataTransferLength;
-
- /* Check the direction of the SCSI command data stage */
- if (SCSICommandBlock.Header.Flags & COMMAND_DIRECTION_DATA_IN)
- {
- /* 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()));
- }
-
- /* 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;
-}
-
-/** Clears the stall condition in the attached device on the nominated endpoint number.
- *
- * \param EndpointNum Endpoint number in the attached device whose stall condition is to be cleared
- *
- * \return A value from the USB_Host_SendControlErrorCodes_t enum
- */
-uint8_t MassStore_ClearPipeStall(const uint8_t EndpointNum)
-{
- USB_ControlRequest = (USB_Request_Header_t)
- {
- .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_ENDPOINT),
- .bRequest = REQ_ClearFeature,
- .wValue = FEATURE_ENDPOINT_HALT,
- .wIndex = EndpointNum,
- .wLength = 0,
- };
-
- /* Select the control pipe for the request transfer */
- Pipe_SelectPipe(PIPE_CONTROLPIPE);
-
- return USB_Host_SendControlRequest(NULL);
-}
-
-/** Issues a Mass Storage class specific request to reset the attached device's Mass Storage interface,
- * readying the device for the next CBW.
- *
- * \return A value from the USB_Host_SendControlErrorCodes_t enum
- */
-uint8_t MassStore_MassStorageReset(void)
-{
- USB_ControlRequest = (USB_Request_Header_t)
- {
- .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
- .bRequest = REQ_MassStorageReset,
- .wValue = 0,
- .wIndex = 0,
- .wLength = 0,
- };
-
- /* Select the control pipe for the request transfer */
- Pipe_SelectPipe(PIPE_CONTROLPIPE);
-
- return USB_Host_SendControlRequest(NULL);
-}
-
-/** Issues a Mass Storage class specific request to determine the index of the highest numbered Logical
- * Unit in the attached device.
- *
- * \param MaxLUNIndex Pointer to the location that the maximum LUN index value should be stored
- *
- * \return A value from the USB_Host_SendControlErrorCodes_t enum
- */
-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 = 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;
- }
-
- return ErrorCode;
-}
-
-/** 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 LUNIndex Index of the LUN inside the device the command is being addressed to
- * \param 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
- */
-uint8_t MassStore_RequestSense(const uint8_t LUNIndex, const SCSI_Request_Sense_Response_t* const SensePtr)
-{
- uint8_t ReturnCode = PIPE_RWSTREAM_NoError;
-
- /* Create a CBW with a SCSI command to issue REQUEST SENSE command */
- SCSICommandBlock = (CommandBlockWrapper_t)
- {
- .Header =
- {
- .Signature = CBW_SIGNATURE,
- .Tag = MassStore_Tag,
- .DataTransferLength = sizeof(SCSI_Request_Sense_Response_t),
- .Flags = COMMAND_DIRECTION_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 SCSI command to the attached device */
- MassStore_SendCommand();
-
- /* Wait until data received from the device */
- if ((ReturnCode = MassStore_WaitForDataReceived()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- /* Read the returned sense data into the buffer */
- if ((ReturnCode = MassStore_SendReceiveData((uint8_t*)SensePtr)) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- /* Read in the returned CSW from the device */
- if ((ReturnCode = MassStore_GetReturnedStatus()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- return PIPE_RWSTREAM_NoError;
-}
-
-/** 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 LUNIndex Index of the LUN inside the device the command is being addressed to
- * \param BlockAddress Start block address to read from
- * \param Blocks Number of blocks to read from the device
- * \param BlockSize Size in bytes of each block to read
- * \param 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
- */
-uint8_t MassStore_ReadDeviceBlock(const uint8_t LUNIndex, const uint32_t BlockAddress,
- const uint8_t Blocks, const uint16_t BlockSize, void* BufferPtr)
-{
- uint8_t ReturnCode = PIPE_RWSTREAM_NoError;
-
- /* Create a CBW with a SCSI command to read in the given blocks from the device */
- SCSICommandBlock = (CommandBlockWrapper_t)
- {
- .Header =
- {
- .Signature = CBW_SIGNATURE,
- .Tag = MassStore_Tag,
- .DataTransferLength = ((uint32_t)Blocks * BlockSize),
- .Flags = COMMAND_DIRECTION_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, // Unused (reserved)
- 0x00, // MSB of Total Blocks to Read
- Blocks, // LSB of Total Blocks to Read
- 0x00 // Unused (control)
- }
- };
-
- /* Send SCSI command to the attached device */
- MassStore_SendCommand();
-
- /* Wait until data received from the device */
- if ((ReturnCode = MassStore_WaitForDataReceived()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- /* Read the returned block data into the buffer */
- if ((ReturnCode = MassStore_SendReceiveData(BufferPtr)) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- /* Read in the returned CSW from the device */
- if ((ReturnCode = MassStore_GetReturnedStatus()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- return PIPE_RWSTREAM_NoError;
-}
-
-/** 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 LUNIndex Index of the LUN inside the device the command is being addressed to
- * \param BlockAddress Start block address to write to
- * \param Blocks Number of blocks to write to in the device
- * \param BlockSize Size in bytes of each block to write
- * \param 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
- */
-uint8_t MassStore_WriteDeviceBlock(const uint8_t LUNIndex, const uint32_t BlockAddress,
- const uint8_t Blocks, const uint16_t BlockSize, void* BufferPtr)
-{
- uint8_t ReturnCode = PIPE_RWSTREAM_NoError;
-
- /* Create a CBW with a SCSI command to write the given blocks to the device */
- SCSICommandBlock = (CommandBlockWrapper_t)
- {
- .Header =
- {
- .Signature = CBW_SIGNATURE,
- .Tag = MassStore_Tag,
- .DataTransferLength = ((uint32_t)Blocks * BlockSize),
- .Flags = COMMAND_DIRECTION_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 SCSI command to the attached device */
- MassStore_SendCommand();
-
- /* Write the data to the device from the buffer */
- if ((ReturnCode = MassStore_SendReceiveData(BufferPtr)) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- /* Read in the returned CSW from the device */
- if ((ReturnCode = MassStore_GetReturnedStatus()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- return PIPE_RWSTREAM_NoError;
-}
-
-/** Issues a SCSI Device Test Unit Ready command to the attached device, to determine if the device is ready to accept
- * other commands.
- *
- * \param 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
- */
-uint8_t MassStore_TestUnitReady(const uint8_t LUNIndex)
-{
- uint8_t ReturnCode = PIPE_RWSTREAM_NoError;
-
- /* Create a CBW with a SCSI command to issue TEST UNIT READY command */
- SCSICommandBlock = (CommandBlockWrapper_t)
- {
- .Header =
- {
- .Signature = CBW_SIGNATURE,
- .Tag = MassStore_Tag,
- .DataTransferLength = 0,
- .Flags = COMMAND_DIRECTION_DATA_IN,
- .LUN = LUNIndex,
- .SCSICommandLength = 6
- },
-
- .SCSICommandData =
- {
- SCSI_CMD_TEST_UNIT_READY,
- 0x00, // Reserved
- 0x00, // Reserved
- 0x00, // Reserved
- 0x00, // Reserved
- 0x00 // Unused (control)
- }
- };
-
- /* Send SCSI command to the attached device */
- MassStore_SendCommand();
-
- /* Read in the returned CSW from the device */
- if ((ReturnCode = MassStore_GetReturnedStatus()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- return PIPE_RWSTREAM_NoError;
-}
-
-/** Issues a SCSI Device Read Capacity command to the attached device, to determine the capacity of the
- * given Logical Unit within the device.
- *
- * \param LUNIndex Index of the LUN inside the device the command is being addressed to
- * \param CapacityPtr Device capacity structure where the capacity data is to be stored
- *
- * \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
- */
-uint8_t MassStore_ReadCapacity(const uint8_t LUNIndex, SCSI_Capacity_t* const CapacityPtr)
-{
- uint8_t ReturnCode = PIPE_RWSTREAM_NoError;
-
- /* Create a CBW with a SCSI command to issue READ CAPACITY command */
- SCSICommandBlock = (CommandBlockWrapper_t)
- {
- .Header =
- {
- .Signature = CBW_SIGNATURE,
- .Tag = MassStore_Tag,
- .DataTransferLength = sizeof(SCSI_Capacity_t),
- .Flags = COMMAND_DIRECTION_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 SCSI command to the attached device */
- MassStore_SendCommand();
-
- /* Wait until data received from the device */
- if ((ReturnCode = MassStore_WaitForDataReceived()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- /* Read the returned capacity data into the buffer */
- if ((ReturnCode = MassStore_SendReceiveData(CapacityPtr)) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- /* Endian-correct the read data */
- CapacityPtr->Blocks = SwapEndian_32(CapacityPtr->Blocks);
- CapacityPtr->BlockSize = SwapEndian_32(CapacityPtr->BlockSize);
-
- /* Read in the returned CSW from the device */
- if ((ReturnCode = MassStore_GetReturnedStatus()) != PIPE_RWSTREAM_NoError)
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- return PIPE_RWSTREAM_NoError;
-}
-
-/** 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 LUNIndex Index of the LUN inside the device the command is being addressed to
- * \param 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
- */
-uint8_t MassStore_PreventAllowMediumRemoval(const uint8_t LUNIndex, const bool PreventRemoval)
-{
- uint8_t ReturnCode = PIPE_RWSTREAM_NoError;
-
- /* Create a CBW with a SCSI command to issue PREVENT ALLOW MEDIUM REMOVAL command */
- SCSICommandBlock = (CommandBlockWrapper_t)
- {
- .Header =
- {
- .Signature = CBW_SIGNATURE,
- .Tag = MassStore_Tag,
- .DataTransferLength = 0,
- .Flags = COMMAND_DIRECTION_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 SCSI command to the attached device */
- MassStore_SendCommand();
-
- /* Read in the returned CSW from the device */
- if ((ReturnCode = MassStore_GetReturnedStatus()))
- {
- Pipe_Freeze();
- return ReturnCode;
- }
-
- return PIPE_RWSTREAM_NoError;
-}
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