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/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* SCSI command processing routines, for SCSI commands issued by the host. Mass Storage
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* devices use a thin "Bulk-Only Transport" protocol for issuing commands and status information,
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* which wrap around standard SCSI device commands for controlling the actual storage medium.
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*/
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#define INCLUDE_FROM_SCSI_C
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#include "SCSI.h"
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/** Structure to hold the SCSI response data to a SCSI INQUIRY command. This gives information about the device's
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* features and capabilities.
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*/
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SCSI_Inquiry_Response_t InquiryData =
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{
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.DeviceType = DEVICE_TYPE_BLOCK,
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.PeripheralQualifier = 0,
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.Removable = true,
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.Version = 0,
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.ResponseDataFormat = 2,
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.NormACA = false,
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.TrmTsk = false,
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.AERC = false,
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.AdditionalLength = 0x1F,
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.SoftReset = false,
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.CmdQue = false,
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.Linked = false,
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.Sync = false,
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.WideBus16Bit = false,
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.WideBus32Bit = false,
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.RelAddr = false,
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.VendorID = "LUFA",
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.ProductID = "Dataflash Disk",
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.RevisionID = {'0','.','0','0'},
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};
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/** Structure to hold the sense data for the last issued SCSI command, which is returned to the host after a SCSI REQUEST SENSE
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* command is issued. This gives information on exactly why the last command failed to complete.
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*/
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SCSI_Request_Sense_Response_t SenseData =
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{
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.ResponseCode = 0x70,
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.AdditionalLength = 0x0A,
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};
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/** Main routine to process the SCSI command located in the Command Block Wrapper read from the host. This dispatches
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* to the appropriate SCSI command handling routine if the issued command is supported by the device, else it returns
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* a command failure due to a ILLEGAL REQUEST.
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*
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* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with
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*/
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bool SCSI_DecodeSCSICommand(USB_ClassInfo_MS_Device_t* MSInterfaceInfo)
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{
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bool CommandSuccess = false;
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/* Run the appropriate SCSI command hander function based on the passed command */
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switch (MSInterfaceInfo->State.CommandBlock.SCSICommandData[0])
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{
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case SCSI_CMD_INQUIRY:
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CommandSuccess = SCSI_Command_Inquiry(MSInterfaceInfo);
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break;
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case SCSI_CMD_REQUEST_SENSE:
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CommandSuccess = SCSI_Command_Request_Sense(MSInterfaceInfo);
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break;
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case SCSI_CMD_READ_CAPACITY_10:
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CommandSuccess = SCSI_Command_Read_Capacity_10(MSInterfaceInfo);
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break;
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case SCSI_CMD_SEND_DIAGNOSTIC:
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CommandSuccess = SCSI_Command_Send_Diagnostic(MSInterfaceInfo);
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break;
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case SCSI_CMD_WRITE_10:
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CommandSuccess = SCSI_Command_ReadWrite_10(MSInterfaceInfo, DATA_WRITE);
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break;
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case SCSI_CMD_READ_10:
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CommandSuccess = SCSI_Command_ReadWrite_10(MSInterfaceInfo, DATA_READ);
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break;
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case SCSI_CMD_TEST_UNIT_READY:
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case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
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case SCSI_CMD_VERIFY_10:
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/* These commands should just succeed, no handling required */
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CommandSuccess = true;
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MSInterfaceInfo->State.CommandBlock.DataTransferLength = 0;
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break;
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default:
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/* Update the SENSE key to reflect the invalid command */
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SCSI_SET_SENSE(SCSI_SENSE_KEY_ILLEGAL_REQUEST,
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SCSI_ASENSE_INVALID_COMMAND,
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SCSI_ASENSEQ_NO_QUALIFIER);
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break;
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}
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/* Check if command was successfully processed */
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if (CommandSuccess)
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{
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SCSI_SET_SENSE(SCSI_SENSE_KEY_GOOD,
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SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,
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SCSI_ASENSEQ_NO_QUALIFIER);
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return true;
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}
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return false;
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}
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/** Command processing for an issued SCSI INQUIRY command. This command returns information about the device's features
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* and capabilities to the host.
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*
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* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with
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*
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* \return Boolean true if the command completed successfully, false otherwise.
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*/
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static bool SCSI_Command_Inquiry(USB_ClassInfo_MS_Device_t* MSInterfaceInfo)
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{
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uint16_t AllocationLength = (((uint16_t)MSInterfaceInfo->State.CommandBlock.SCSICommandData[3] << 8) |
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MSInterfaceInfo->State.CommandBlock.SCSICommandData[4]);
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uint16_t BytesTransferred = (AllocationLength < sizeof(InquiryData))? AllocationLength :
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sizeof(InquiryData);
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/* Only the standard INQUIRY data is supported, check if any optional INQUIRY bits set */
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if ((MSInterfaceInfo->State.CommandBlock.SCSICommandData[1] & ((1 << 0) | (1 << 1))) ||
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MSInterfaceInfo->State.CommandBlock.SCSICommandData[2])
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{
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/* Optional but unsupported bits set - update the SENSE key and fail the request */
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SCSI_SET_SENSE(SCSI_SENSE_KEY_ILLEGAL_REQUEST,
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SCSI_ASENSE_INVALID_FIELD_IN_CDB,
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SCSI_ASENSEQ_NO_QUALIFIER);
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return false;
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}
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Endpoint_Write_Stream_LE(&InquiryData, BytesTransferred, NO_STREAM_CALLBACK);
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uint8_t PadBytes[AllocationLength - BytesTransferred];
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/* Pad out remaining bytes with 0x00 */
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Endpoint_Write_Stream_LE(&PadBytes, (AllocationLength - BytesTransferred), NO_STREAM_CALLBACK);
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/* Finalize the stream transfer to send the last packet */
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Fixed GenericHIDHost demo report write routine incorrect for control type requests (thanks to Andrei Krainev).
Removed Endpoint_ClearCurrentBank() and Pipe_ClearCurrentBank() in favour of new Endpoint_ClearIN(), Endpoint_ClearOUT(), Endpoint_ClearControlIN(), Endpoint_ClearControlOUT(), Pipe_ClearIN(), Pipe_ClearOUT(), Pipe_ClearControlIN() and Pipe_ClearControlOUT() macros (done to allow for the detection of packets of zero length).
Renamed *_ReadWriteAllowed() macros to *_IsReadWriteAllowed() to remain consistent with the rest of the LUFA API.
Endpoint_IsSetupReceived() macro has been renamed to Endpoint_IsSETUPReceived(), Endpoint_ClearSetupReceived() macro has been renamed to Endpoint_ClearControlSETUP(), the Pipe_IsSetupSent() macro has been renamed to Pipe_IsSETUPSent() and the Pipe_ClearSetupSent() macro is no longer applicable and should be removed - changes made to compliment the new endpoint and pipe bank management API.
Updated all demos, bootloaders and projects to use the new endpoint and pipe management APIs (thanks to Roman Thiel).
Updated library doxygen documentation, added groups, changed documentation macro functions to real functions for clarity.
Removed old endpoint and pipe aliased read/write/discard routines which did not have an explicit endian specifier for clarity.
Removed the ButtLoadTag.h header file, as no one used for its intended purpose anyway.
16 years ago
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Endpoint_ClearIN();
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/* Succeed the command and update the bytes transferred counter */
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MSInterfaceInfo->State.CommandBlock.DataTransferLength -= BytesTransferred;
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return true;
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}
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/** Command processing for an issued SCSI REQUEST SENSE command. This command returns information about the last issued command,
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* including the error code and additional error information so that the host can determine why a command failed to complete.
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*
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* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with
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*
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* \return Boolean true if the command completed successfully, false otherwise.
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*/
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static bool SCSI_Command_Request_Sense(USB_ClassInfo_MS_Device_t* MSInterfaceInfo)
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{
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uint8_t AllocationLength = MSInterfaceInfo->State.CommandBlock.SCSICommandData[4];
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uint8_t BytesTransferred = (AllocationLength < sizeof(SenseData))? AllocationLength : sizeof(SenseData);
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uint8_t PadBytes[AllocationLength - BytesTransferred];
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Endpoint_Write_Stream_LE(&SenseData, BytesTransferred, NO_STREAM_CALLBACK);
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Endpoint_Write_Stream_LE(&PadBytes, (AllocationLength - BytesTransferred), NO_STREAM_CALLBACK);
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Fixed GenericHIDHost demo report write routine incorrect for control type requests (thanks to Andrei Krainev).
Removed Endpoint_ClearCurrentBank() and Pipe_ClearCurrentBank() in favour of new Endpoint_ClearIN(), Endpoint_ClearOUT(), Endpoint_ClearControlIN(), Endpoint_ClearControlOUT(), Pipe_ClearIN(), Pipe_ClearOUT(), Pipe_ClearControlIN() and Pipe_ClearControlOUT() macros (done to allow for the detection of packets of zero length).
Renamed *_ReadWriteAllowed() macros to *_IsReadWriteAllowed() to remain consistent with the rest of the LUFA API.
Endpoint_IsSetupReceived() macro has been renamed to Endpoint_IsSETUPReceived(), Endpoint_ClearSetupReceived() macro has been renamed to Endpoint_ClearControlSETUP(), the Pipe_IsSetupSent() macro has been renamed to Pipe_IsSETUPSent() and the Pipe_ClearSetupSent() macro is no longer applicable and should be removed - changes made to compliment the new endpoint and pipe bank management API.
Updated all demos, bootloaders and projects to use the new endpoint and pipe management APIs (thanks to Roman Thiel).
Updated library doxygen documentation, added groups, changed documentation macro functions to real functions for clarity.
Removed old endpoint and pipe aliased read/write/discard routines which did not have an explicit endian specifier for clarity.
Removed the ButtLoadTag.h header file, as no one used for its intended purpose anyway.
16 years ago
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Endpoint_ClearIN();
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/* Succeed the command and update the bytes transferred counter */
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MSInterfaceInfo->State.CommandBlock.DataTransferLength -= BytesTransferred;
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return true;
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}
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/** Command processing for an issued SCSI READ CAPACITY (10) command. This command returns information about the device's capacity
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* on the selected Logical Unit (drive), as a number of OS-sized blocks.
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*
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* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with
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*
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* \return Boolean true if the command completed successfully, false otherwise.
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*/
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static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* MSInterfaceInfo)
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{
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uint32_t LastBlockAddressInLUN = (LUN_MEDIA_BLOCKS - 1);
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uint32_t MediaBlockSize = VIRTUAL_MEMORY_BLOCK_SIZE;
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Endpoint_Write_Stream_BE(&LastBlockAddressInLUN, sizeof(LastBlockAddressInLUN), NO_STREAM_CALLBACK);
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Endpoint_Write_Stream_BE(&MediaBlockSize, sizeof(MediaBlockSize), NO_STREAM_CALLBACK);
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Fixed GenericHIDHost demo report write routine incorrect for control type requests (thanks to Andrei Krainev).
Removed Endpoint_ClearCurrentBank() and Pipe_ClearCurrentBank() in favour of new Endpoint_ClearIN(), Endpoint_ClearOUT(), Endpoint_ClearControlIN(), Endpoint_ClearControlOUT(), Pipe_ClearIN(), Pipe_ClearOUT(), Pipe_ClearControlIN() and Pipe_ClearControlOUT() macros (done to allow for the detection of packets of zero length).
Renamed *_ReadWriteAllowed() macros to *_IsReadWriteAllowed() to remain consistent with the rest of the LUFA API.
Endpoint_IsSetupReceived() macro has been renamed to Endpoint_IsSETUPReceived(), Endpoint_ClearSetupReceived() macro has been renamed to Endpoint_ClearControlSETUP(), the Pipe_IsSetupSent() macro has been renamed to Pipe_IsSETUPSent() and the Pipe_ClearSetupSent() macro is no longer applicable and should be removed - changes made to compliment the new endpoint and pipe bank management API.
Updated all demos, bootloaders and projects to use the new endpoint and pipe management APIs (thanks to Roman Thiel).
Updated library doxygen documentation, added groups, changed documentation macro functions to real functions for clarity.
Removed old endpoint and pipe aliased read/write/discard routines which did not have an explicit endian specifier for clarity.
Removed the ButtLoadTag.h header file, as no one used for its intended purpose anyway.
16 years ago
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Endpoint_ClearIN();
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/* Succeed the command and update the bytes transferred counter */
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MSInterfaceInfo->State.CommandBlock.DataTransferLength -= 8;
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return true;
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}
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/** Command processing for an issued SCSI SEND DIAGNOSTIC command. This command performs a quick check of the Dataflash ICs on the
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* board, and indicates if they are present and functioning correctly. Only the Self-Test portion of the diagnostic command is
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* supported.
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*
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* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with
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*
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* \return Boolean true if the command completed successfully, false otherwise.
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*/
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static bool SCSI_Command_Send_Diagnostic(USB_ClassInfo_MS_Device_t* MSInterfaceInfo)
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{
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uint8_t ReturnByte;
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/* Check to see if the SELF TEST bit is not set */
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if (!(MSInterfaceInfo->State.CommandBlock.SCSICommandData[1] & (1 << 2)))
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{
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/* Only self-test supported - update SENSE key and fail the command */
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SCSI_SET_SENSE(SCSI_SENSE_KEY_ILLEGAL_REQUEST,
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SCSI_ASENSE_INVALID_FIELD_IN_CDB,
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SCSI_ASENSEQ_NO_QUALIFIER);
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return false;
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}
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/* Test first Dataflash IC is present and responding to commands */
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Dataflash_SelectChip(DATAFLASH_CHIP1);
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Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);
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ReturnByte = Dataflash_ReceiveByte();
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Dataflash_DeselectChip();
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/* If returned data is invalid, fail the command */
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if (ReturnByte != DF_MANUFACTURER_ATMEL)
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{
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/* Update SENSE key with a hardware error condition and return command fail */
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SCSI_SET_SENSE(SCSI_SENSE_KEY_HARDWARE_ERROR,
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SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,
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SCSI_ASENSEQ_NO_QUALIFIER);
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return false;
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}
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#if (DATAFLASH_TOTALCHIPS == 2)
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/* Test second Dataflash IC is present and responding to commands */
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Dataflash_SelectChip(DATAFLASH_CHIP2);
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Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO);
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ReturnByte = Dataflash_ReceiveByte();
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Dataflash_DeselectChip();
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/* If returned data is invalid, fail the command */
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if (ReturnByte != DF_MANUFACTURER_ATMEL)
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{
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/* Update SENSE key with a hardware error condition and return command fail */
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SCSI_SET_SENSE(SCSI_SENSE_KEY_HARDWARE_ERROR,
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SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,
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SCSI_ASENSEQ_NO_QUALIFIER);
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return false;
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}
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#endif
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/* Succeed the command and update the bytes transferred counter */
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MSInterfaceInfo->State.CommandBlock.DataTransferLength = 0;
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return true;
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}
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/** Command processing for an issued SCSI READ (10) or WRITE (10) command. This command reads in the block start address
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* and total number of blocks to process, then calls the appropriate low-level dataflash routine to handle the actual
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* reading and writing of the data.
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*
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* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with
|
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* \param[in] IsDataRead Indicates if the command is a READ (10) command or WRITE (10) command (DATA_READ or DATA_WRITE)
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*
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* \return Boolean true if the command completed successfully, false otherwise.
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*/
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|
static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* MSInterfaceInfo, const bool IsDataRead)
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{
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|
uint32_t BlockAddress;
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|
uint16_t TotalBlocks;
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|
/* Load in the 32-bit block address (SCSI uses big-endian, so have to do it byte-by-byte) */
|
|
|
|
((uint8_t*)&BlockAddress)[3] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[2];
|
|
|
|
((uint8_t*)&BlockAddress)[2] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[3];
|
|
|
|
((uint8_t*)&BlockAddress)[1] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[4];
|
|
|
|
((uint8_t*)&BlockAddress)[0] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[5];
|
|
|
|
|
|
|
|
/* Load in the 16-bit total blocks (SCSI uses big-endian, so have to do it byte-by-byte) */
|
|
|
|
((uint8_t*)&TotalBlocks)[1] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[7];
|
|
|
|
((uint8_t*)&TotalBlocks)[0] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[8];
|
|
|
|
|
|
|
|
/* Check if the block address is outside the maximum allowable value for the LUN */
|
|
|
|
if (BlockAddress >= LUN_MEDIA_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;
|
|
|
|
}
|
|
|
|
|
|
|
|
#if (TOTAL_LUNS > 1)
|
|
|
|
/* Adjust the given block address to the real media address based on the selected LUN */
|
|
|
|
BlockAddress += ((uint32_t)MSInterfaceInfo->State.CommandBlock.LUN * LUN_MEDIA_BLOCKS);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* 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;
|
|
|
|
}
|