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106 lines
4.4 KiB
C
106 lines
4.4 KiB
C
/*
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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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/** \ingroup Group_USBClassMS
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* @{
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*/
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#ifndef _MS_CLASS_COMMON_H_
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#define _MS_CLASS_COMMON_H_
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/* Includes: */
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#include "../../USB.h"
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#include <string.h>
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/* Enable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Macros: */
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/** Mass Storage Class specific request to reset the Mass Storage interface, ready for the next command. */
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#define REQ_MassStorageReset 0xFF
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/** Mass Storage Class specific request to retrieve the total number of Logical Units (drives) in the SCSI device. */
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#define REQ_GetMaxLUN 0xFE
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/** Magic signature for a Command Block Wrapper used in the Mass Storage Bulk-Only transport protocol. */
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#define MS_CBW_SIGNATURE 0x43425355UL
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/** Magic signature for a Command Status Wrapper used in the Mass Storage Bulk-Only transport protocol. */
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#define MS_CSW_SIGNATURE 0x53425355UL
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/** Mask for a Command Block Wrapper's flags attribute to specify a command with data sent from host-to-device. */
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#define MS_COMMAND_DIR_DATA_OUT (0 << 7)
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/** Mask for a Command Block Wrapper's flags attribute to specify a command with data sent from device-to-host. */
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#define MS_COMMAND_DIR_DATA_IN (1 << 7)
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/* Type defines: */
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/** Type define for a Command Block Wrapper, used in the Mass Storage Bulk-Only Transport protocol. */
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typedef struct
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{
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uint32_t Signature; /**< Command block signature, must be CBW_SIGNATURE to indicate a valid Command Block */
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uint32_t Tag; /**< Unique command ID value, to associate a command block wrapper with its command status wrapper */
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uint32_t DataTransferLength; /** Length of the optional data portion of the issued command, in bytes */
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uint8_t Flags; /**< Command block flags, indicating command data direction */
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uint8_t LUN; /**< Logical Unit number this command is issued to */
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uint8_t SCSICommandLength; /**< Length of the issued SCSI command within the SCSI command data array */
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uint8_t SCSICommandData[16]; /**< Issued SCSI command in the Command Block */
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} MS_CommandBlockWrapper_t;
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/** Type define for a Command Status Wrapper, used in the Mass Storage Bulk-Only Transport protocol. */
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typedef struct
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{
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uint32_t Signature; /**< Status block signature, must be CSW_SIGNATURE to indicate a valid Command Status */
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uint32_t Tag; /**< Unique command ID value, to associate a command block wrapper with its command status wrapper */
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uint32_t DataTransferResidue; /**< Number of bytes of data not processed in the SCSI command */
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uint8_t Status; /**< Status code of the issued command - a value from the MassStorage_CommandStatusCodes_t enum */
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} MS_CommandStatusWrapper_t;
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/* Enums: */
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/** Enum for the possible command status wrapper return status codes. */
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enum MassStorage_CommandStatusCodes_t
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{
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SCSI_Command_Pass = 0, /**< Command completed with no error */
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SCSI_Command_Fail = 1, /**< Command failed to complete - host may check the exact error via a SCSI REQUEST SENSE command */
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SCSI_Phase_Error = 2 /**< Command failed due to being invalid in the current phase */
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};
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/* Disable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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}
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#endif
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#endif
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/** @} */
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