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_8(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                         bool SCSICommandResult = CALLBACK_MS_Device_SCSICommandReceived(MSInterfaceInfo);
 128
 129                         MSInterfaceInfo->State.CommandStatus.Status              = (SCSICommandResult) ? MS_SCSI_COMMAND_Pass : MS_SCSI_COMMAND_Fail;
 130                         MSInterfaceInfo->State.CommandStatus.Signature           = CPU_TO_LE32(MS_CSW_SIGNATURE);
 131                         MSInterfaceInfo->State.CommandStatus.Tag                 = MSInterfaceInfo->State.CommandBlock.Tag;
 132                         MSInterfaceInfo->State.CommandStatus.DataTransferResidue = MSInterfaceInfo->State.CommandBlock.DataTransferLength;
 133
 134                         if (!(SCSICommandResult) && (le32_to_cpu(MSInterfaceInfo->State.CommandStatus.DataTransferResidue)))
 135                           Endpoint_StallTransaction();
 136
 137                         MS_Device_ReturnCommandStatus(MSInterfaceInfo);
 138                 }
 139         }
 140
 141         if (MSInterfaceInfo->State.IsMassStoreReset)
 142         {
 143                 Endpoint_ResetEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 144                 Endpoint_ResetEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 145
 146                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 147                 Endpoint_ClearStall();
 148                 Endpoint_ResetDataToggle();
 149                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 150                 Endpoint_ClearStall();
 151                 Endpoint_ResetDataToggle();
 152
 153                 MSInterfaceInfo->State.IsMassStoreReset = false;
 154         }
 155 }
 156
 157 static bool MS_Device_ReadInCommandBlock(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 158 {
 159         uint16_t BytesProcessed;
 160
 161         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 162
 163         BytesProcessed = 0;
 164         while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock,
 165                                        (sizeof(MS_CommandBlockWrapper_t) - 16), &BytesProcessed) ==
 166                                        ENDPOINT_RWSTREAM_IncompleteTransfer)
 167         {
 168                 if (MSInterfaceInfo->State.IsMassStoreReset)
 169                   return false;
 170         }
 171
 172         if ((MSInterfaceInfo->State.CommandBlock.Signature         != CPU_TO_LE32(MS_CBW_SIGNATURE))     ||
 173             (MSInterfaceInfo->State.CommandBlock.LUN               >= MSInterfaceInfo->Config.TotalLUNs) ||
 174                 (MSInterfaceInfo->State.CommandBlock.Flags              & 0x1F)                              ||
 175                 (MSInterfaceInfo->State.CommandBlock.SCSICommandLength == 0)                                 ||
 176                 (MSInterfaceInfo->State.CommandBlock.SCSICommandLength >  16))
 177         {
 178                 Endpoint_StallTransaction();
 179                 Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 180                 Endpoint_StallTransaction();
 181
 182                 return false;
 183         }
 184
 185         BytesProcessed = 0;
 186         while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock.SCSICommandData,
 187                                         MSInterfaceInfo->State.CommandBlock.SCSICommandLength, &BytesProcessed) ==
 188                                         ENDPOINT_RWSTREAM_IncompleteTransfer)
 189         {
 190                 if (MSInterfaceInfo->State.IsMassStoreReset)
 191                   return false;
 192         }
 193
 194         Endpoint_ClearOUT();
 195
 196         return true;
 197 }
 198
 199 static void MS_Device_ReturnCommandStatus(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 200 {
 201         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
 202
 203         while (Endpoint_IsStalled())
 204         {
 205                 if (MSInterfaceInfo->State.IsMassStoreReset)
 206                   return;
 207         }
 208
 209         Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
 210
 211         while (Endpoint_IsStalled())
 212         {
 213                 if (MSInterfaceInfo->State.IsMassStoreReset)
 214                   return;
 215         }
 216
 217         uint16_t BytesProcessed = 0;
 218         while (Endpoint_Write_Stream_LE(&MSInterfaceInfo->State.CommandStatus,
 219                                         sizeof(MS_CommandStatusWrapper_t), &BytesProcessed) ==
 220                                         ENDPOINT_RWSTREAM_IncompleteTransfer)
 221         {
 222                 if (MSInterfaceInfo->State.IsMassStoreReset)
 223                   return;
 224         }
 225
 226         Endpoint_ClearIN();
 227 }
 228
 229 #endif