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Diffstat (limited to 'lib/lufa/Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.c')
| -rw-r--r-- | lib/lufa/Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.c | 635 |
1 files changed, 0 insertions, 635 deletions
diff --git a/lib/lufa/Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.c b/lib/lufa/Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.c deleted file mode 100644 index 5f0dd6f1a4..0000000000 --- a/lib/lufa/Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.c +++ /dev/null @@ -1,635 +0,0 @@ -/* - 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); -} - |