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160 lines
7.2 KiB
160 lines
7.2 KiB
/*
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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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* Header file for MassStorage.c.
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*/
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#ifndef _MASS_STORAGE_H_
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#define _MASS_STORAGE_H_
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/* Includes: */
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#include <avr/io.h>
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#include <avr/wdt.h>
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#include "Descriptors.h"
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#include "SCSI.h"
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#include "DataflashManager.h"
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#include <LUFA/Version.h> // Library Version Information
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#include <LUFA/Common/ButtLoadTag.h> // PROGMEM tags readable by the ButtLoad project
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#include <LUFA/Drivers/USB/USB.h> // USB Functionality
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#include <LUFA/Drivers/Board/LEDs.h> // LEDs driver
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#include <LUFA/Drivers/Board/Dataflash.h> // Dataflash chip driver
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#include <LUFA/Scheduler/Scheduler.h> // Simple scheduler for task management
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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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/** Maximum length of a SCSI command which can be issued by the device or host in a Mass Storage bulk wrapper. */
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#define MAX_SCSI_COMMAND_LENGTH 16
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/** Total number of Logical Units (drives) in the device. By default, the total device capacity is shared equally between
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* each drive - this can be set to any positive non-zero amount. */
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#define TOTAL_LUNS 2
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/** Blocks in each LUN, calculated from the total capacity divided by the total number of Logical Units in the device. */
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#define LUN_MEDIA_BLOCKS (VIRTUAL_MEMORY_BLOCKS / TOTAL_LUNS)
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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 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 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 COMMAND_DIRECTION_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 COMMAND_DIRECTION_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[MAX_SCSI_COMMAND_LENGTH]; /**< Issued SCSI command in the Command Block */
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} 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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} 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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Command_Pass = 0, /**< Command completed with no error */
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Command_Fail = 1, /**< Command failed to complete - host may check the exact error via a SCSI REQUEST SENSE command */
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Phase_Error = 2 /**< Command failed due to being invalid in the current phase */
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};
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/** Enum for the possible status codes for passing to the UpdateStatus() function. */
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enum MassStorage_StatusCodes_t
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{
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Status_USBNotReady = 0, /**< USB is not ready (disconnected from a USB host) */
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Status_USBEnumerating = 1, /**< USB interface is enumerating */
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Status_USBReady = 2, /**< USB interface is connected and ready */
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Status_CommandBlockError = 3, /**< Processing a SCSI command block from the host */
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Status_ProcessingCommandBlock = 4, /**< Error during the processing of a SCSI command block from the host */
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};
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/* Global Variables: */
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extern CommandBlockWrapper_t CommandBlock;
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extern CommandStatusWrapper_t CommandStatus;
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extern volatile bool IsMassStoreReset;
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/* Task Definitions: */
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TASK(USB_MassStorage);
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/* Stream Callbacks: */
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STREAM_CALLBACK(AbortOnMassStoreReset);
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/* Event Handlers: */
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/** Indicates that this module will catch the USB_Reset event when thrown by the library. */
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HANDLES_EVENT(USB_Reset);
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/** Indicates that this module will catch the USB_Connect event when thrown by the library. */
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HANDLES_EVENT(USB_Connect);
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/** Indicates that this module will catch the USB_Disconnect event when thrown by the library. */
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HANDLES_EVENT(USB_Disconnect);
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/** Indicates that this module will catch the USB_ConfigurationChanged event when thrown by the library. */
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HANDLES_EVENT(USB_ConfigurationChanged);
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/** Indicates that this module will catch the USB_UnhandledControlPacket event when thrown by the library. */
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HANDLES_EVENT(USB_UnhandledControlPacket);
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/* Function Prototypes: */
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void UpdateStatus(uint8_t CurrentStatus);
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#if defined(INCLUDE_FROM_MASSSTORAGE_C)
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static bool ReadInCommandBlock(void);
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static void ReturnCommandStatus(void);
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#endif
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#endif
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