Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Header file for MassStoreCommands.c.
  34  */
  35
  36 #ifndef _MASS_STORE_COMMANDS_H_
  37 #define _MASS_STORE_COMMANDS_H_
  38
  39         /* Includes: */
  40                 #include <avr/io.h>
  41
  42                 #include "MassStorageHost.h"
  43                 #include "SCSI_Codes.h"
  44
  45                 #include <LUFA/Drivers/USB/USB.h>                    // USB Functionality
  46
  47         /* Macros: */
  48                 /** Class specific request to reset the Mass Storage interface of the attached device */
  49                 #define REQ_MassStorageReset             0xFF
  50
  51                 /** Class specific request to retrieve the maximum Logical Unit Number (LUN) index of the attached device */
  52                 #define REQ_GetMaxLUN                    0xFE
  53
  54                 /** Command Block Wrapper signature byte, for verification of valid CBW blocks */
  55                 #define CBW_SIGNATURE                    0x43425355UL
  56
  57                 /** Command Static Wrapper signature byte, for verification of valid CSW blocks */
  58                 #define CSW_SIGNATURE                    0x53425355UL
  59
  60                 /** Data direction mask for the Flags field of a CBW, indicating Host-to-Device transfer direction */
  61                 #define COMMAND_DIRECTION_DATA_OUT       (0 << 7)
  62
  63                 /** Data direction mask for the Flags field of a CBW, indicating Device-to-Host transfer direction */
  64                 #define COMMAND_DIRECTION_DATA_IN        (1 << 7)
  65
  66                 /** Timeout period between the issuing of a CBW to a device, and the reception of the first packet */
  67                 #define COMMAND_DATA_TIMEOUT_MS          500
  68
  69                 /** Pipe number of the Mass Storage data IN pipe */
  70                 #define MASS_STORE_DATA_IN_PIPE          1
  71
  72                 /** Pipe number of the Mass Storage data OUT pipe */
  73                 #define MASS_STORE_DATA_OUT_PIPE         2
  74
  75         /* Type defines: */
  76                 /** Type define for a Mass Storage class Command Block Wrapper, used to wrap SCSI
  77                  *  commands for transport over the USB bulk endpoints to the device.
  78                  */
  79                 typedef struct
  80                 {
  81                         struct
  82                         {
  83                                 uint32_t Signature; /**< Command block signature, always equal to CBW_SIGNATURE */
  84                                 uint32_t Tag; /**< Current CBW tag, to positively associate a CBW with a CSW */
  85                                 uint32_t DataTransferLength; /**< Length of data to transfer, following the CBW */
  86                                 uint8_t  Flags; /**< Block flags, equal to one of the COMMAND_DIRECTION_DATA_* macros */
  87                                 uint8_t  LUN; /**< Logical Unit Number the CBW is addressed to in the device */
  88                                 uint8_t  SCSICommandLength; /**< Length of the SCSI command in the CBW */
  89                         } Header;
  90
  91                         uint8_t SCSICommandData[16]; /**< SCSI command to issue to the device */
  92                 } CommandBlockWrapper_t;
  93
  94                 /** Type define for a Mass Storage class Command Status Wrapper, used to wrap SCSI
  95                  *  responses for transport over the USB bulk endpoints from the device.
  96                  */
  97                 typedef struct
  98                 {
  99                         uint32_t Signature; /**< Command status signature, always equal to CSW_SIGNATURE */
 100                         uint32_t Tag; /**< Current CBW tag, to positively associate a CBW with a CSW */
 101                         uint32_t DataTransferResidue; /**< Length of data not transferred */
 102                         uint8_t  Status; /**< Command status, a value from the MassStorageHost_CommandStatusCodes_t enum */
 103                 } CommandStatusWrapper_t;
 104
 105                 /** Type define for a SCSI Sense structure. Structures of this type are filled out by the
 106                  *  device via the MassStore_RequestSense() function, indicating the current sense data of the
 107                  *  device (giving explicit error codes for the last issued command). For details of the
 108                  *  structure contents, refer to the SCSI specifications.
 109                  */
 110                 typedef struct
 111                 {
 112                         uint8_t       ReponseCode;
 113
 114                         uint8_t       SegmentNumber;
 115
 116                         unsigned char SenseKey            : 4;
 117                         unsigned char _RESERVED1          : 1;
 118                         unsigned char ILI                 : 1;
 119                         unsigned char EOM                 : 1;
 120                         unsigned char FileMark            : 1;
 121
 122                         uint8_t      Information[4];
 123                         uint8_t      AdditionalLength;
 124                         uint8_t      CmdSpecificInformation[4];
 125                         uint8_t      AdditionalSenseCode;
 126                         uint8_t      AdditionalSenseQualifier;
 127                         uint8_t      FieldReplaceableUnitCode;
 128                         uint8_t      SenseKeySpecific[3];
 129                 } SCSI_Request_Sense_Response_t;
 130
 131                 /** SCSI capacity structure, to hold the total capacity of the device in both the number
 132                  *  of blocks in the current LUN, and the size of each block. This structure is filled by
 133                  *  the device when the MassStore_ReadCapacity() function is called.
 134                  */
 135                 typedef struct
 136                 {
 137                         uint32_t Blocks; /**< Number of blocks in the addressed LUN of the device */
 138                         uint32_t BlockSize; /**< Number of bytes in each block in the addressed LUN */
 139                 } SCSI_Capacity_t;
 140
 141         /* Enums: */
 142                 /** CSW status return codes, indicating the overall status of the issued CBW */
 143                 enum MassStorageHost_CommandStatusCodes_t
 144                 {
 145                         Command_Pass = 0, /**< Command completed successfully */
 146                         Command_Fail = 1, /**< Command failed to complete successfully */
 147                         Phase_Error  = 2 /**< Phase error while processing the issued command */
 148                 };
 149
 150         /* External Variables: */
 151                 extern CommandStatusWrapper_t SCSICommandStatus;
 152
 153         /* Function Prototypes: */
 154                 #if defined(INCLUDE_FROM_MASSSTORE_COMMANDS_C)
 155                         static uint8_t MassStore_SendCommand(void);
 156                         static uint8_t MassStore_WaitForDataReceived(void);
 157                         static uint8_t MassStore_SendReceiveData(void* BufferPtr) ATTR_NON_NULL_PTR_ARG(1);
 158                         static uint8_t MassStore_GetReturnedStatus(void);
 159                 #endif
 160
 161                 uint8_t MassStore_ClearPipeStall(const uint8_t EndpointNum);
 162                 uint8_t MassStore_MassStorageReset(void);
 163                 uint8_t MassStore_GetMaxLUN(uint8_t* const MaxLUNIndex);
 164                 uint8_t MassStore_RequestSense(const uint8_t LUNIndex, const SCSI_Request_Sense_Response_t* const SensePtr)
 165                                                ATTR_NON_NULL_PTR_ARG(2);
 166                 uint8_t MassStore_ReadDeviceBlock(const uint8_t LUNIndex, const uint32_t BlockAddress,
 167                                                   const uint8_t Blocks, const uint16_t BlockSize, void* BufferPtr) ATTR_NON_NULL_PTR_ARG(5);
 168                 uint8_t MassStore_WriteDeviceBlock(const uint8_t LUNIndex, const uint32_t BlockAddress,
 169                                            const uint8_t Blocks, const uint16_t BlockSize, void* BufferPtr) ATTR_NON_NULL_PTR_ARG(5);
 170                 uint8_t MassStore_ReadCapacity(const uint8_t LUNIndex, SCSI_Capacity_t* const CapacityPtr)
 171                                                ATTR_NON_NULL_PTR_ARG(2);
 172                 uint8_t MassStore_TestUnitReady(const uint8_t LUNIndex);
 173                 uint8_t MassStore_PreventAllowMediumRemoval(const uint8_t LUNIndex, const bool PreventRemoval);
 174
 175 #endif