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+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2009.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, and distribute this software
+ and its documentation for any purpose and without fee is hereby
+ granted, 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 disclaim 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
+ *
+ * Header file for MassStorage.c.
+ */
+
+#ifndef _MASS_STORAGE_H_
+#define _MASS_STORAGE_H_
+
+ /* Includes: */
+ #include <avr/io.h>
+ #include <avr/wdt.h>
+
+ #include "Descriptors.h"
+ #include "SCSI.h"
+ #include "DataflashManager.h"
+
+ #include <LUFA/Version.h> // Library Version Information
+ #include <LUFA/Common/ButtLoadTag.h> // PROGMEM tags readable by the ButtLoad project
+ #include <LUFA/Drivers/USB/USB.h> // USB Functionality
+ #include <LUFA/Drivers/Board/LEDs.h> // LEDs driver
+ #include <LUFA/Drivers/Board/Dataflash.h> // Dataflash chip driver
+ #include <LUFA/Scheduler/Scheduler.h> // Simple scheduler for task management
+
+ /* Macros: */
+ /** Mass Storage Class specific request to reset the Mass Storage interface, ready for the next command. */
+ #define REQ_MassStorageReset 0xFF
+
+ /** Mass Storage Class specific request to retrieve the total number of Logical Units (drives) in the SCSI device. */
+ #define REQ_GetMaxLUN 0xFE
+
+ /** Maximum length of a SCSI command which can be issued by the device or host in a Mass Storage bulk wrapper. */
+ #define MAX_SCSI_COMMAND_LENGTH 16
+
+ /** Total number of Logical Units (drives) in the device. By default, the total device capacity is shared equally between
+ * each drive - this can be set to any positive non-zero amount. */
+ #define TOTAL_LUNS 2
+
+ /** Blocks in each LUN, calculated from the total capacity divided by the total number of Logical Units in the device. */
+ #define LUN_MEDIA_BLOCKS (VIRTUAL_MEMORY_BLOCKS / TOTAL_LUNS)
+
+ /** Magic signature for a Command Block Wrapper used in the Mass Storage Bulk-Only transport protocol. */
+ #define CBW_SIGNATURE 0x43425355UL
+
+ /** Magic signature for a Command Status Wrapper used in the Mass Storage Bulk-Only transport protocol. */
+ #define CSW_SIGNATURE 0x53425355UL
+
+ /** Mask for a Command Block Wrapper's flags attribute to specify a command with data sent from host-to-device. */
+ #define COMMAND_DIRECTION_DATA_OUT (0 << 7)
+
+ /** Mask for a Command Block Wrapper's flags attribute to specify a command with data sent from device-to-host. */
+ #define COMMAND_DIRECTION_DATA_IN (1 << 7)
+
+ /* Type defines: */
+ /** Type define for a Command Block Wrapper, used in the Mass Storage Bulk-Only Transport protocol. */
+ typedef struct
+ {
+ uint32_t Signature; /**< Command block signature, must be CBW_SIGNATURE to indicate a valid Command Block */
+ uint32_t Tag; /**< Unique command ID value, to associate a command block wrapper with its command status wrapper */
+ uint32_t DataTransferLength; /** Length of the optional data portion of the issued command, in bytes */
+ uint8_t Flags; /**< Command block flags, indicating command data direction */
+ uint8_t LUN; /**< Logical Unit number this command is issued to */
+ uint8_t SCSICommandLength; /**< Length of the issued SCSI command within the SCSI command data array */
+ uint8_t SCSICommandData[MAX_SCSI_COMMAND_LENGTH]; /**< Issued SCSI command in the Command Block */
+ } CommandBlockWrapper_t;
+
+ /** Type define for a Command Status Wrapper, used in the Mass Storage Bulk-Only Transport protocol. */
+ typedef struct
+ {
+ uint32_t Signature; /**< Status block signature, must be CSW_SIGNATURE to indicate a valid Command Status */
+ uint32_t Tag; /**< Unique command ID value, to associate a command block wrapper with its command status wrapper */
+ uint32_t DataTransferResidue; /**< Number of bytes of data not processed in the SCSI command */
+ uint8_t Status; /**< Status code of the issued command - a value from the MassStorage_CommandStatusCodes_t enum */
+ } CommandStatusWrapper_t;
+
+ /* Enums: */
+ /** Enum for the possible command status wrapper return status codes. */
+ enum MassStorage_CommandStatusCodes_t
+ {
+ Command_Pass = 0, /**< Command completed with no error */
+ Command_Fail = 1, /**< Command failed to complete - host may check the exact error via a SCSI REQUEST SENSE command */
+ Phase_Error = 2 /**< Command failed due to being invalid in the current phase */
+ };
+
+ /** Enum for the possible status codes for passing to the UpdateStatus() function. */
+ enum MassStorage_StatusCodes_t
+ {
+ Status_USBNotReady = 0, /**< USB is not ready (disconnected from a USB host) */
+ Status_USBEnumerating = 1, /**< USB interface is enumerating */
+ Status_USBReady = 2, /**< USB interface is connected and ready */
+ Status_CommandBlockError = 3, /**< Processing a SCSI command block from the host */
+ Status_ProcessingCommandBlock = 4, /**< Error during the processing of a SCSI command block from the host */
+ };
+
+ /* Global Variables: */
+ extern CommandBlockWrapper_t CommandBlock;
+ extern CommandStatusWrapper_t CommandStatus;
+ extern volatile bool IsMassStoreReset;
+
+ /* Task Definitions: */
+ TASK(USB_MassStorage);
+
+ /* Stream Callbacks: */
+ STREAM_CALLBACK(AbortOnMassStoreReset);
+
+ /* Event Handlers: */
+ /** Indicates that this module will catch the USB_Reset event when thrown by the library. */
+ HANDLES_EVENT(USB_Reset);
+
+ /** Indicates that this module will catch the USB_Connect event when thrown by the library. */
+ HANDLES_EVENT(USB_Connect);
+
+ /** Indicates that this module will catch the USB_Disconnect event when thrown by the library. */
+ HANDLES_EVENT(USB_Disconnect);
+
+ /** Indicates that this module will catch the USB_ConfigurationChanged event when thrown by the library. */
+ HANDLES_EVENT(USB_ConfigurationChanged);
+
+ /** Indicates that this module will catch the USB_UnhandledControlPacket event when thrown by the library. */
+ HANDLES_EVENT(USB_UnhandledControlPacket);
+
+ /* Function Prototypes: */
+ void UpdateStatus(uint8_t CurrentStatus);
+
+ #if defined(INCLUDE_FROM_MASSSTORAGE_C)
+ static bool ReadInCommandBlock(void);
+ static void ReturnCommandStatus(void);
+ #endif
+
+#endif