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 "../../Core/USBMode.h"
  33
  34 #if defined(USB_CAN_BE_DEVICE)
  35
  36 #define  __INCLUDE_FROM_MS_DRIVER
  37 #define  __INCLUDE_FROM_MASSSTORAGE_DEVICE_C
  38 #include "MassStorage.h"
  39
  40 void MS_Device_ProcessControlRequest(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
  41 {
  42         if (!(Endpoint_IsSETUPReceived()))
  43           return;
  44
  45         if (USB_ControlRequest.wIndex != MSInterfaceInfo->Config.InterfaceNumber)
  46           return;
  47
  48         switch (USB_ControlRequest.bRequest)
  49         {
  50                 case MS_REQ_MassStorageReset:
  51                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  52                         {
  53                                 Endpoint_ClearSETUP();
  54                                 Endpoint_ClearStatusStage();
  55
  56                                 MSInterfaceInfo->State.IsMassStoreReset = true;
  57                         }
  58
  59                         break;
  60                 case MS_REQ_GetMaxLUN:
  61                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  62                         {
  63                                 Endpoint_ClearSETUP();
  64                                 Endpoint_Write_Byte(MSInterfaceInfo->Config.TotalLUNs - 1);
  65                                 Endpoint_ClearIN();
  66                                 Endpoint_ClearStatusStage();
  67                         }
  68
  69                         break;
  70         }
  71 }
  72
  73 bool MS_Device_ConfigureEndpoints(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
  74 {
  75         memset(&MSInterfaceInfo->State, 0x00, sizeof(MSInterfaceInfo->State));
  76
  77         for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
  78         {
  79                 uint16_t Size;
  80                 uint8_t  Type;
  81                 uint8_t  Direction;
  82                 bool     DoubleBanked;
  83
  84                 if (EndpointNum == MSInterfaceInfo->Config.DataINEndpointNumber)
  85                 {
  86                         Size         = MSInterfaceInfo->Config.DataINEndpointSize;
  87                         Direction    = ENDPOINT_DIR_IN;
  88                         Type         = EP_TYPE_BULK;
  89                         DoubleBanked = MSInterfaceInfo->Config.DataINEndpointDoubleBank;
  90                 }
  91                 else if (EndpointNum == MSInterfaceInfo->Config.DataOUTEndpointNumber)
  92                 {
  93                         Size         = MSInterfaceInfo->Config.DataOUTEndpointSize;
  94                         Direction    = ENDPOINT_DIR_OUT;
  95                         Type         = EP_TYPE_BULK;
  96                         DoubleBanked = MSInterfaceInfo->Config.DataOUTEndpointDoubleBank;
  97                 }
  98                 else
  99                 {
 100                         continue;
 101                 }
 102
 103                 if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
 104                                                  DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
 105                 {
 106                         return false;
 107                 }
 108         }
 109
 110         return true;
 111 }
 112
 113 void MS_Device_USBTask(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 114 {
 115         if (USB_DeviceState != DEVICE_STATE_Configured)
 116           return;
 117
 118         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 119
 120         if (Endpoint_IsReadWriteAllowed())
 121         {
 122                 if (MS_Device_ReadInCommandBlock(MSInterfaceInfo))
 123                 {
 124                         if (MSInterfaceInfo->State.CommandBlock.Flags & MS_COMMAND_DIR_DATA_IN)
 125                           Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 126
 127                         MSInterfaceInfo->State.CommandStatus.Status = CALLBACK_MS_Device_SCSICommandReceived(MSInterfaceInfo) ?
 128                                                                        MS_SCSI_COMMAND_Pass : MS_SCSI_COMMAND_Fail;
 129                         MSInterfaceInfo->State.CommandStatus.Signature           = MS_CSW_SIGNATURE;
 130                         MSInterfaceInfo->State.CommandStatus.Tag                 = MSInterfaceInfo->State.CommandBlock.Tag;
 131                         MSInterfaceInfo->State.CommandStatus.DataTransferResidue = MSInterfaceInfo->State.CommandBlock.DataTransferLength;
 132
 133                         if ((MSInterfaceInfo->State.CommandStatus.Status == MS_SCSI_COMMAND_Fail) &&
 134                             (MSInterfaceInfo->State.CommandStatus.DataTransferResidue))
 135                         {
 136                                 Endpoint_StallTransaction();
 137                         }
 138
 139                         MS_Device_ReturnCommandStatus(MSInterfaceInfo);
 140                 }
 141         }
 142
 143         if (MSInterfaceInfo->State.IsMassStoreReset)
 144         {
 145                 Endpoint_ResetEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 146                 Endpoint_ResetEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 147
 148                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 149                 Endpoint_ClearStall();
 150                 Endpoint_ResetDataToggle();
 151                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 152                 Endpoint_ClearStall();
 153                 Endpoint_ResetDataToggle();
 154
 155                 MSInterfaceInfo->State.IsMassStoreReset = false;
 156         }
 157 }
 158
 159 static bool MS_Device_ReadInCommandBlock(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 160 {
 161         uint16_t BytesProcessed;
 162
 163         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 164
 165         BytesProcessed = 0;
 166         while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock,
 167                                        (sizeof(MS_CommandBlockWrapper_t) - 16), &BytesProcessed) ==
 168                                        ENDPOINT_RWSTREAM_IncompleteTransfer)
 169         {
 170                 if (MSInterfaceInfo->State.IsMassStoreReset)
 171                   return false;
 172         }
 173
 174         if ((MSInterfaceInfo->State.CommandBlock.Signature         != MS_CBW_SIGNATURE)                  ||
 175             (MSInterfaceInfo->State.CommandBlock.LUN               >= MSInterfaceInfo->Config.TotalLUNs) ||
 176                 (MSInterfaceInfo->State.CommandBlock.Flags              & 0x1F)                              ||
 177                 (MSInterfaceInfo->State.CommandBlock.SCSICommandLength == 0)                                 ||
 178                 (MSInterfaceInfo->State.CommandBlock.SCSICommandLength >  16))
 179         {
 180                 Endpoint_StallTransaction();
 181                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 182                 Endpoint_StallTransaction();
 183
 184                 return false;
 185         }
 186
 187         BytesProcessed = 0;
 188         while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock.SCSICommandData,
 189                                         MSInterfaceInfo->State.CommandBlock.SCSICommandLength, &BytesProcessed) ==
 190                                         ENDPOINT_RWSTREAM_IncompleteTransfer)
 191         {
 192                 if (MSInterfaceInfo->State.IsMassStoreReset)
 193                   return false;
 194         }
 195
 196         Endpoint_ClearOUT();
 197
 198         return true;
 199 }
 200
 201 static void MS_Device_ReturnCommandStatus(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 202 {
 203         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 204
 205         while (Endpoint_IsStalled())
 206         {
 207                 #if !defined(INTERRUPT_CONTROL_ENDPOINT)
 208                 USB_USBTask();
 209                 #endif
 210
 211                 if (MSInterfaceInfo->State.IsMassStoreReset)
 212                   return;
 213         }
 214
 215         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 216
 217         while (Endpoint_IsStalled())
 218         {
 219                 #if !defined(INTERRUPT_CONTROL_ENDPOINT)
 220                 USB_USBTask();
 221                 #endif
 222
 223                 if (MSInterfaceInfo->State.IsMassStoreReset)
 224                   return;
 225         }
 226
 227         uint16_t BytesProcessed = 0;
 228         while (Endpoint_Write_Stream_LE(&MSInterfaceInfo->State.CommandStatus,
 229                                         sizeof(MS_CommandStatusWrapper_t), &BytesProcessed) ==
 230                                         ENDPOINT_RWSTREAM_IncompleteTransfer)
 231         {
 232                 if (MSInterfaceInfo->State.IsMassStoreReset)
 233                   return;
 234         }
 235
 236         Endpoint_ClearIN();
 237 }
 238
 239 #endif