LUFA/Drivers/USB/Class/Device/MassStorage.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all 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 #define  __INCLUDE_FROM_USB_DRIVER
  32 #include "../../HighLevel/USBMode.h"
  33 #if defined(USB_CAN_BE_DEVICE)
  34
  35 #define  __INCLUDE_FROM_MS_DRIVER
  36 #define  __INCLUDE_FROM_MASSSTORAGE_DEVICE_C
  37 #include "MassStorage.h"
  38
  39 void MS_Device_ProcessControlRequest(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
  40 {
  41         if (!(Endpoint_IsSETUPReceived()))
  42           return;
  43
  44         if (USB_ControlRequest.wIndex != MSInterfaceInfo->Config.InterfaceNumber)
  45           return;
  46
  47         switch (USB_ControlRequest.bRequest)
  48         {
  49                 case MS_REQ_MassStorageReset:
  50                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  51                         {
  52                                 Endpoint_ClearSETUP();
  53                                 Endpoint_ClearStatusStage();
  54
  55                                 MSInterfaceInfo->State.IsMassStoreReset = true;
  56                         }
  57
  58                         break;
  59                 case MS_REQ_GetMaxLUN:
  60                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  61                         {
  62                                 Endpoint_ClearSETUP();
  63                                 Endpoint_Write_Byte(MSInterfaceInfo->Config.TotalLUNs - 1);
  64                                 Endpoint_ClearIN();
  65                                 Endpoint_ClearStatusStage();
  66                         }
  67
  68                         break;
  69         }
  70 }
  71
  72 bool MS_Device_ConfigureEndpoints(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
  73 {
  74         memset(&MSInterfaceInfo->State, 0x00, sizeof(MSInterfaceInfo->State));
  75
  76         for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
  77         {
  78                 uint16_t Size;
  79                 uint8_t  Type;
  80                 uint8_t  Direction;
  81                 bool     DoubleBanked;
  82
  83                 if (EndpointNum == MSInterfaceInfo->Config.DataINEndpointNumber)
  84                 {
  85                         Size         = MSInterfaceInfo->Config.DataINEndpointSize;
  86                         Direction    = ENDPOINT_DIR_IN;
  87                         Type         = EP_TYPE_BULK;
  88                         DoubleBanked = MSInterfaceInfo->Config.DataINEndpointDoubleBank;
  89                 }
  90                 else if (EndpointNum == MSInterfaceInfo->Config.DataOUTEndpointNumber)
  91                 {
  92                         Size         = MSInterfaceInfo->Config.DataOUTEndpointSize;
  93                         Direction    = ENDPOINT_DIR_OUT;
  94                         Type         = EP_TYPE_BULK;
  95                         DoubleBanked = MSInterfaceInfo->Config.DataOUTEndpointDoubleBank;
  96                 }
  97                 else
  98                 {
  99                         continue;
 100                 }
 101
 102                 if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
 103                                                  DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
 104                 {
 105                         return false;
 106                 }
 107         }
 108
 109         return true;
 110 }
 111
 112 void MS_Device_USBTask(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 113 {
 114         if (USB_DeviceState != DEVICE_STATE_Configured)
 115           return;
 116
 117         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 118
 119         if (Endpoint_IsReadWriteAllowed())
 120         {
 121                 if (MS_Device_ReadInCommandBlock(MSInterfaceInfo))
 122                 {
 123                         if (MSInterfaceInfo->State.CommandBlock.Flags & MS_COMMAND_DIR_DATA_IN)
 124                           Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 125
 126                         MSInterfaceInfo->State.CommandStatus.Status = CALLBACK_MS_Device_SCSICommandReceived(MSInterfaceInfo) ?
 127                                                                        MS_SCSI_COMMAND_Pass : MS_SCSI_COMMAND_Fail;
 128                         MSInterfaceInfo->State.CommandStatus.Signature           = MS_CSW_SIGNATURE;
 129                         MSInterfaceInfo->State.CommandStatus.Tag                 = MSInterfaceInfo->State.CommandBlock.Tag;
 130                         MSInterfaceInfo->State.CommandStatus.DataTransferResidue = MSInterfaceInfo->State.CommandBlock.DataTransferLength;
 131
 132                         if ((MSInterfaceInfo->State.CommandStatus.Status == MS_SCSI_COMMAND_Fail) &&
 133                             (MSInterfaceInfo->State.CommandStatus.DataTransferResidue))
 134                         {
 135                                 Endpoint_StallTransaction();
 136                         }
 137
 138                         MS_Device_ReturnCommandStatus(MSInterfaceInfo);
 139                 }
 140         }
 141
 142         if (MSInterfaceInfo->State.IsMassStoreReset)
 143         {
 144                 Endpoint_ResetFIFO(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 145                 Endpoint_ResetFIFO(MSInterfaceInfo->Config.DataINEndpointNumber);
 146
 147                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 148                 Endpoint_ClearStall();
 149                 Endpoint_ResetDataToggle();
 150                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 151                 Endpoint_ClearStall();
 152                 Endpoint_ResetDataToggle();
 153
 154                 MSInterfaceInfo->State.IsMassStoreReset = false;
 155         }
 156 }
 157
 158 static bool MS_Device_ReadInCommandBlock(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 159 {
 160         uint16_t BytesProcessed;
 161
 162         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 163
 164         BytesProcessed = 0;
 165         while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock,
 166                                        (sizeof(MS_CommandBlockWrapper_t) - 16), &BytesProcessed) ==
 167                                        ENDPOINT_RWSTREAM_IncompleteTransfer)
 168         {
 169                 if (MSInterfaceInfo->State.IsMassStoreReset)
 170                   return false;
 171         }
 172
 173         if ((MSInterfaceInfo->State.CommandBlock.Signature         != MS_CBW_SIGNATURE)                  ||
 174             (MSInterfaceInfo->State.CommandBlock.LUN               >= MSInterfaceInfo->Config.TotalLUNs) ||
 175                 (MSInterfaceInfo->State.CommandBlock.Flags              & 0x1F)                              ||
 176                 (MSInterfaceInfo->State.CommandBlock.SCSICommandLength == 0)                                 ||
 177                 (MSInterfaceInfo->State.CommandBlock.SCSICommandLength >  16))
 178         {
 179                 Endpoint_StallTransaction();
 180                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 181                 Endpoint_StallTransaction();
 182
 183                 return false;
 184         }
 185
 186         BytesProcessed = 0;
 187         while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock.SCSICommandData,
 188                                         MSInterfaceInfo->State.CommandBlock.SCSICommandLength, &BytesProcessed) ==
 189                                         ENDPOINT_RWSTREAM_IncompleteTransfer)
 190         {
 191                 if (MSInterfaceInfo->State.IsMassStoreReset)
 192                   return false;
 193         }
 194
 195         Endpoint_ClearOUT();
 196
 197         return true;
 198 }
 199
 200 static void MS_Device_ReturnCommandStatus(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 201 {
 202         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 203
 204         while (Endpoint_IsStalled())
 205         {
 206                 #if !defined(INTERRUPT_CONTROL_ENDPOINT)
 207                 USB_USBTask();
 208                 #endif
 209
 210                 if (MSInterfaceInfo->State.IsMassStoreReset)
 211                   return;
 212         }
 213
 214         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 215
 216         while (Endpoint_IsStalled())
 217         {
 218                 #if !defined(INTERRUPT_CONTROL_ENDPOINT)
 219                 USB_USBTask();
 220                 #endif
 221
 222                 if (MSInterfaceInfo->State.IsMassStoreReset)
 223                   return;
 224         }
 225
 226         uint16_t BytesProcessed = 0;
 227         while (Endpoint_Write_Stream_LE(&MSInterfaceInfo->State.CommandStatus,
 228                                         sizeof(MS_CommandStatusWrapper_t), &BytesProcessed) ==
 229                                         ENDPOINT_RWSTREAM_IncompleteTransfer)
 230         {
 231                 if (MSInterfaceInfo->State.IsMassStoreReset)
 232                   return;
 233         }
 234
 235         Endpoint_ClearIN();
 236 }
 237
 238 #endif