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Diffstat (limited to 'Projects/Webserver/Lib/SCSI.c')
| -rw-r--r-- | Projects/Webserver/Lib/SCSI.c | 344 |
1 files changed, 0 insertions, 344 deletions
diff --git a/Projects/Webserver/Lib/SCSI.c b/Projects/Webserver/Lib/SCSI.c deleted file mode 100644 index 4fbbfd60e8..0000000000 --- a/Projects/Webserver/Lib/SCSI.c +++ /dev/null @@ -1,344 +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 - * - * SCSI command processing routines, for SCSI commands issued by the host. Mass Storage - * devices use a thin "Bulk-Only Transport" protocol for issuing commands and status information, - * which wrap around standard SCSI device commands for controlling the actual storage medium. - */ - -#define INCLUDE_FROM_SCSI_C -#include "SCSI.h" - -/** Structure to hold the SCSI response data to a SCSI INQUIRY command. This gives information about the device's - * features and capabilities. - */ -static const SCSI_Inquiry_Response_t InquiryData = - { - .DeviceType = DEVICE_TYPE_BLOCK, - .PeripheralQualifier = 0, - - .Removable = true, - - .Version = 0, - - .ResponseDataFormat = 2, - .NormACA = false, - .TrmTsk = false, - .AERC = false, - - .AdditionalLength = 0x1F, - - .SoftReset = false, - .CmdQue = false, - .Linked = false, - .Sync = false, - .WideBus16Bit = false, - .WideBus32Bit = false, - .RelAddr = false, - - .VendorID = "LUFA", - .ProductID = "Dataflash Disk", - .RevisionID = {'0','.','0','0'}, - }; - -/** Structure to hold the sense data for the last issued SCSI command, which is returned to the host after a SCSI REQUEST SENSE - * command is issued. This gives information on exactly why the last command failed to complete. - */ -static SCSI_Request_Sense_Response_t SenseData = - { - .ResponseCode = 0x70, - .AdditionalLength = 0x0A, - }; - - -/** Main routine to process the SCSI command located in the Command Block Wrapper read from the host. This dispatches - * to the appropriate SCSI command handling routine if the issued command is supported by the device, else it returns - * a command failure due to a ILLEGAL REQUEST. - * - * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with - * - * \return Boolean \c true if the command completed successfully, \c false otherwise - */ -bool SCSI_DecodeSCSICommand(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) -{ - bool CommandSuccess = false; - - /* Run the appropriate SCSI command hander function based on the passed command */ - switch (MSInterfaceInfo->State.CommandBlock.SCSICommandData[0]) - { - case SCSI_CMD_INQUIRY: - CommandSuccess = SCSI_Command_Inquiry(MSInterfaceInfo); - break; - case SCSI_CMD_REQUEST_SENSE: - CommandSuccess = SCSI_Command_Request_Sense(MSInterfaceInfo); - break; - case SCSI_CMD_READ_CAPACITY_10: - CommandSuccess = SCSI_Command_Read_Capacity_10(MSInterfaceInfo); - break; - case SCSI_CMD_SEND_DIAGNOSTIC: - CommandSuccess = SCSI_Command_Send_Diagnostic(MSInterfaceInfo); - break; - case SCSI_CMD_WRITE_10: - CommandSuccess = SCSI_Command_ReadWrite_10(MSInterfaceInfo, DATA_WRITE); - break; - case SCSI_CMD_READ_10: - CommandSuccess = SCSI_Command_ReadWrite_10(MSInterfaceInfo, DATA_READ); - break; - case SCSI_CMD_MODE_SENSE_6: - CommandSuccess = SCSI_Command_ModeSense_6(MSInterfaceInfo); - break; - case SCSI_CMD_START_STOP_UNIT: - case SCSI_CMD_TEST_UNIT_READY: - case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL: - case SCSI_CMD_VERIFY_10: - /* These commands should just succeed, no handling required */ - CommandSuccess = true; - MSInterfaceInfo->State.CommandBlock.DataTransferLength = 0; - break; - default: - /* Update the SENSE key to reflect the invalid command */ - SCSI_SET_SENSE(SCSI_SENSE_KEY_ILLEGAL_REQUEST, - SCSI_ASENSE_INVALID_COMMAND, - SCSI_ASENSEQ_NO_QUALIFIER); - break; - } - - /* Check if command was successfully processed */ - if (CommandSuccess) - { - SCSI_SET_SENSE(SCSI_SENSE_KEY_GOOD, - SCSI_ASENSE_NO_ADDITIONAL_INFORMATION, - SCSI_ASENSEQ_NO_QUALIFIER); - - return true; - } - - return false; -} - -/** Command processing for an issued SCSI INQUIRY command. This command returns information about the device's features - * and capabilities to the host. - * - * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with - * - * \return Boolean \c true if the command completed successfully, \c false otherwise. - */ -static bool SCSI_Command_Inquiry(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) -{ - uint16_t AllocationLength = SwapEndian_16(*(uint16_t*)&MSInterfaceInfo->State.CommandBlock.SCSICommandData[3]); - uint16_t BytesTransferred = MIN(AllocationLength, sizeof(InquiryData)); - - /* Only the standard INQUIRY data is supported, check if any optional INQUIRY bits set */ - if ((MSInterfaceInfo->State.CommandBlock.SCSICommandData[1] & ((1 << 0) | (1 << 1))) || - MSInterfaceInfo->State.CommandBlock.SCSICommandData[2]) - { - /* Optional but unsupported bits set - update the SENSE key and fail the request */ - SCSI_SET_SENSE(SCSI_SENSE_KEY_ILLEGAL_REQUEST, - SCSI_ASENSE_INVALID_FIELD_IN_CDB, - SCSI_ASENSEQ_NO_QUALIFIER); - - return false; - } - - Endpoint_Write_Stream_LE(&InquiryData, BytesTransferred, NULL); - - /* Pad out remaining bytes with 0x00 */ - Endpoint_Null_Stream((AllocationLength - BytesTransferred), NULL); - - /* Finalize the stream transfer to send the last packet */ - Endpoint_ClearIN(); - - /* Succeed the command and update the bytes transferred counter */ - MSInterfaceInfo->State.CommandBlock.DataTransferLength -= BytesTransferred; - - return true; -} - -/** Command processing for an issued SCSI REQUEST SENSE command. This command returns information about the last issued command, - * including the error code and additional error information so that the host can determine why a command failed to complete. - * - * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with - * - * \return Boolean \c true if the command completed successfully, \c false otherwise. - */ -static bool SCSI_Command_Request_Sense(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) -{ - uint8_t AllocationLength = MSInterfaceInfo->State.CommandBlock.SCSICommandData[4]; - uint8_t BytesTransferred = MIN(AllocationLength, sizeof(SenseData)); - - Endpoint_Write_Stream_LE(&SenseData, BytesTransferred, NULL); - Endpoint_Null_Stream((AllocationLength - BytesTransferred), NULL); - Endpoint_ClearIN(); - - /* Succeed the command and update the bytes transferred counter */ - MSInterfaceInfo->State.CommandBlock.DataTransferLength -= BytesTransferred; - - return true; -} - -/** Command processing for an issued SCSI READ CAPACITY (10) command. This command returns information about the device's capacity - * on the selected Logical Unit (drive), as a number of OS-sized blocks. - * - * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with - * - * \return Boolean \c true if the command completed successfully, \c false otherwise. - */ -static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) -{ - uint32_t LastBlockAddressInLUN = (VIRTUAL_MEMORY_BLOCKS - 1); - uint32_t MediaBlockSize = VIRTUAL_MEMORY_BLOCK_SIZE; - - Endpoint_Write_Stream_BE(&LastBlockAddressInLUN, sizeof(LastBlockAddressInLUN), NULL); - Endpoint_Write_Stream_BE(&MediaBlockSize, sizeof(MediaBlockSize), NULL); - Endpoint_ClearIN(); - - /* Succeed the command and update the bytes transferred counter */ - MSInterfaceInfo->State.CommandBlock.DataTransferLength -= 8; - - return true; -} - -/** Command processing for an issued SCSI SEND DIAGNOSTIC command. This command performs a quick check of the Dataflash ICs on the - * board, and indicates if they are present and functioning correctly. Only the Self-Test portion of the diagnostic command is - * supported. - * - * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with - * - * \return Boolean \c true if the command completed successfully, \c false otherwise. - */ -static bool SCSI_Command_Send_Diagnostic(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) -{ - /* Check to see if the SELF TEST bit is not set */ - if (!(MSInterfaceInfo->State.CommandBlock.SCSICommandData[1] & (1 << 2))) - { - /* Only self-test supported - update SENSE key and fail the command */ - SCSI_SET_SENSE(SCSI_SENSE_KEY_ILLEGAL_REQUEST, - SCSI_ASENSE_INVALID_FIELD_IN_CDB, - SCSI_ASENSEQ_NO_QUALIFIER); - - return false; - } - - /* Check to see if all attached Dataflash ICs are functional */ - if (!(DataflashManager_CheckDataflashOperation())) - { - /* Update SENSE key with a hardware error condition and return command fail */ - SCSI_SET_SENSE(SCSI_SENSE_KEY_HARDWARE_ERROR, - SCSI_ASENSE_NO_ADDITIONAL_INFORMATION, - SCSI_ASENSEQ_NO_QUALIFIER); - - return false; - } - - /* Succeed the command and update the bytes transferred counter */ - MSInterfaceInfo->State.CommandBlock.DataTransferLength = 0; - - return true; -} - -/** Command processing for an issued SCSI READ (10) or WRITE (10) command. This command reads in the block start address - * and total number of blocks to process, then calls the appropriate low-level Dataflash routine to handle the actual - * reading and writing of the data. - * - * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with - * \param[in] IsDataRead Indicates if the command is a READ (10) command or WRITE (10) command (DATA_READ or DATA_WRITE) - * - * \return Boolean \c true if the command completed successfully, \c false otherwise. - */ -static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo, - const bool IsDataRead) -{ - uint32_t BlockAddress; - uint16_t TotalBlocks; - - /* Check if the disk is write protected or not */ - if ((IsDataRead == DATA_WRITE) && DISK_READ_ONLY) - { - /* Block address is invalid, update SENSE key and return command fail */ - SCSI_SET_SENSE(SCSI_SENSE_KEY_DATA_PROTECT, - SCSI_ASENSE_WRITE_PROTECTED, - SCSI_ASENSEQ_NO_QUALIFIER); - - return false; - } - - /* Load in the 32-bit block address (SCSI uses big-endian, so have to reverse the byte order) */ - BlockAddress = SwapEndian_32(*(uint32_t*)&MSInterfaceInfo->State.CommandBlock.SCSICommandData[2]); - - /* Load in the 16-bit total blocks (SCSI uses big-endian, so have to reverse the byte order) */ - TotalBlocks = SwapEndian_16(*(uint16_t*)&MSInterfaceInfo->State.CommandBlock.SCSICommandData[7]); - - /* Check if the block address is outside the maximum allowable value for the LUN */ - if (BlockAddress >= VIRTUAL_MEMORY_BLOCKS) - { - /* Block address is invalid, update SENSE key and return command fail */ - SCSI_SET_SENSE(SCSI_SENSE_KEY_ILLEGAL_REQUEST, - SCSI_ASENSE_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE, - SCSI_ASENSEQ_NO_QUALIFIER); - - return false; - } - - /* Determine if the packet is a READ (10) or WRITE (10) command, call appropriate function */ - if (IsDataRead == DATA_READ) - DataflashManager_ReadBlocks(MSInterfaceInfo, BlockAddress, TotalBlocks); - else - DataflashManager_WriteBlocks(MSInterfaceInfo, BlockAddress, TotalBlocks); - - /* Update the bytes transferred counter and succeed the command */ - MSInterfaceInfo->State.CommandBlock.DataTransferLength -= ((uint32_t)TotalBlocks * VIRTUAL_MEMORY_BLOCK_SIZE); - - return true; -} - -/** Command processing for an issued SCSI MODE SENSE (6) command. This command returns various informational pages about - * the SCSI device, as well as the device's Write Protect status. - * - * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with - * - * \return Boolean \c true if the command completed successfully, \c false otherwise. - */ -static bool SCSI_Command_ModeSense_6(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) -{ - /* Send an empty header response with the Write Protect flag status */ - Endpoint_Write_8(0x00); - Endpoint_Write_8(0x00); - Endpoint_Write_8(DISK_READ_ONLY ? 0x80 : 0x00); - Endpoint_Write_8(0x00); - Endpoint_ClearIN(); - - /* Update the bytes transferred counter and succeed the command */ - MSInterfaceInfo->State.CommandBlock.DataTransferLength -= 4; - - return true; -} - |