LUFA/Drivers/USB/Class/Host/CDCClassHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  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 disclaims 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_HOST)
  35
  36 #define  __INCLUDE_FROM_CDC_DRIVER
  37 #define  __INCLUDE_FROM_CDC_HOST_C
  38 #include "CDCClassHost.h"
  39
  40 uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
  41                                 uint16_t ConfigDescriptorSize,
  42                                 void* ConfigDescriptorData)
  43 {
  44         USB_Descriptor_Endpoint_t*  DataINEndpoint       = NULL;
  45         USB_Descriptor_Endpoint_t*  DataOUTEndpoint      = NULL;
  46         USB_Descriptor_Endpoint_t*  NotificationEndpoint = NULL;
  47         USB_Descriptor_Interface_t* CDCControlInterface  = NULL;
  48
  49         memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));
  50
  51         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
  52           return CDC_ENUMERROR_InvalidConfigDescriptor;
  53
  54         while (!(DataINEndpoint) || !(DataOUTEndpoint) || !(NotificationEndpoint))
  55         {
  56                 if (!(CDCControlInterface) ||
  57                     USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  58                                               DCOMP_CDC_Host_NextCDCInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  59                 {
  60                         if (NotificationEndpoint)
  61                         {
  62                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  63                                                               DCOMP_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  64                                 {
  65                                         return CDC_ENUMERROR_NoCompatibleInterfaceFound;
  66                                 }
  67
  68                                 DataINEndpoint  = NULL;
  69                                 DataOUTEndpoint = NULL;
  70                         }
  71                         else
  72                         {
  73                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  74                                                               DCOMP_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  75                                 {
  76                                         return CDC_ENUMERROR_NoCompatibleInterfaceFound;
  77                                 }
  78
  79                                 CDCControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
  80
  81                                 NotificationEndpoint = NULL;
  82                         }
  83
  84                         continue;
  85                 }
  86
  87                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
  88
  89                 if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN)
  90                 {
  91                         if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
  92                           NotificationEndpoint = EndpointData;
  93                         else
  94                           DataINEndpoint = EndpointData;
  95                 }
  96                 else
  97                 {
  98                         DataOUTEndpoint = EndpointData;
  99                 }
 100         }
 101
 102         CDCInterfaceInfo->Config.DataINPipe.Size  = le16_to_cpu(DataINEndpoint->EndpointSize);
 103         CDCInterfaceInfo->Config.DataINPipe.EndpointAddress = DataINEndpoint->EndpointAddress;
 104         CDCInterfaceInfo->Config.DataINPipe.Type  = EP_TYPE_BULK;
 105
 106         CDCInterfaceInfo->Config.DataOUTPipe.Size = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 107         CDCInterfaceInfo->Config.DataOUTPipe.EndpointAddress = DataOUTEndpoint->EndpointAddress;
 108         CDCInterfaceInfo->Config.DataOUTPipe.Type = EP_TYPE_BULK;
 109
 110         CDCInterfaceInfo->Config.NotificationPipe.Size = le16_to_cpu(NotificationEndpoint->EndpointSize);
 111         CDCInterfaceInfo->Config.NotificationPipe.EndpointAddress = NotificationEndpoint->EndpointAddress;
 112         CDCInterfaceInfo->Config.NotificationPipe.Type = EP_TYPE_INTERRUPT;
 113
 114         if (!(Pipe_ConfigurePipeTable(&CDCInterfaceInfo->Config.DataINPipe, 1)))
 115           return false;
 116
 117         if (!(Pipe_ConfigurePipeTable(&CDCInterfaceInfo->Config.DataOUTPipe, 1)))
 118           return false;
 119
 120         if (!(Pipe_ConfigurePipeTable(&CDCInterfaceInfo->Config.NotificationPipe, 1)))
 121           return false;
 122
 123         CDCInterfaceInfo->State.ControlInterfaceNumber = CDCControlInterface->InterfaceNumber;
 124         CDCInterfaceInfo->State.ControlLineStates.HostToDevice = (CDC_CONTROL_LINE_OUT_RTS | CDC_CONTROL_LINE_OUT_DTR);
 125         CDCInterfaceInfo->State.ControlLineStates.DeviceToHost = (CDC_CONTROL_LINE_IN_DCD  | CDC_CONTROL_LINE_IN_DSR);
 126         CDCInterfaceInfo->State.IsActive = true;
 127
 128         return CDC_ENUMERROR_NoError;
 129 }
 130
 131 static uint8_t DCOMP_CDC_Host_NextCDCControlInterface(void* const CurrentDescriptor)
 132 {
 133         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 134
 135         if (Header->Type == DTYPE_Interface)
 136         {
 137                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
 138
 139                 if ((Interface->Class    == CDC_CSCP_CDCClass)    &&
 140                     (Interface->SubClass == CDC_CSCP_ACMSubclass) &&
 141                     (Interface->Protocol == CDC_CSCP_ATCommandProtocol))
 142                 {
 143                         return DESCRIPTOR_SEARCH_Found;
 144                 }
 145         }
 146
 147         return DESCRIPTOR_SEARCH_NotFound;
 148 }
 149
 150 static uint8_t DCOMP_CDC_Host_NextCDCDataInterface(void* const CurrentDescriptor)
 151 {
 152         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 153
 154         if (Header->Type == DTYPE_Interface)
 155         {
 156                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
 157
 158                 if ((Interface->Class    == CDC_CSCP_CDCDataClass)   &&
 159                     (Interface->SubClass == CDC_CSCP_NoDataSubclass) &&
 160                     (Interface->Protocol == CDC_CSCP_NoDataProtocol))
 161                 {
 162                         return DESCRIPTOR_SEARCH_Found;
 163                 }
 164         }
 165
 166         return DESCRIPTOR_SEARCH_NotFound;
 167 }
 168
 169 static uint8_t DCOMP_CDC_Host_NextCDCInterfaceEndpoint(void* const CurrentDescriptor)
 170 {
 171         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 172
 173         if (Header->Type == DTYPE_Endpoint)
 174         {
 175                 USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
 176
 177                 uint8_t EndpointType = (Endpoint->Attributes & EP_TYPE_MASK);
 178
 179                 if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&
 180                     !(Pipe_IsEndpointBound(Endpoint->EndpointAddress)))
 181                 {
 182                         return DESCRIPTOR_SEARCH_Found;
 183                 }
 184         }
 185         else if (Header->Type == DTYPE_Interface)
 186         {
 187                 return DESCRIPTOR_SEARCH_Fail;
 188         }
 189
 190         return DESCRIPTOR_SEARCH_NotFound;
 191 }
 192
 193 void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 194 {
 195         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 196           return;
 197
 198         Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipe.Address);
 199         Pipe_Unfreeze();
 200
 201         if (Pipe_IsINReceived())
 202         {
 203                 USB_Request_Header_t Notification;
 204                 Pipe_Read_Stream_LE(&Notification, sizeof(USB_Request_Header_t), NULL);
 205
 206                 if ((Notification.bRequest      == CDC_NOTIF_SerialState) &&
 207                     (Notification.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)))
 208                 {
 209                         Pipe_Read_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
 210                                             sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
 211                                             NULL);
 212
 213                         Pipe_ClearIN();
 214
 215                         EVENT_CDC_Host_ControLineStateChanged(CDCInterfaceInfo);
 216                 }
 217                 else
 218                 {
 219                         Pipe_ClearIN();
 220                 }
 221         }
 222
 223         Pipe_Freeze();
 224
 225         #if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
 226         CDC_Host_Flush(CDCInterfaceInfo);
 227         #endif
 228 }
 229
 230 uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 231 {
 232         USB_ControlRequest = (USB_Request_Header_t)
 233         {
 234                 .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
 235                 .bRequest      = CDC_REQ_SetLineEncoding,
 236                 .wValue        = 0,
 237                 .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
 238                 .wLength       = sizeof(CDCInterfaceInfo->State.LineEncoding),
 239         };
 240
 241         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 242
 243         return USB_Host_SendControlRequest(&CDCInterfaceInfo->State.LineEncoding);
 244 }
 245
 246 uint8_t CDC_Host_SendControlLineStateChange(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 247 {
 248         USB_ControlRequest = (USB_Request_Header_t)
 249         {
 250                 .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
 251                 .bRequest      = CDC_REQ_SetControlLineState,
 252                 .wValue        = CDCInterfaceInfo->State.ControlLineStates.HostToDevice,
 253                 .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
 254                 .wLength       = 0,
 255         };
 256
 257         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 258
 259         return USB_Host_SendControlRequest(NULL);
 260 }
 261
 262 uint8_t CDC_Host_SendBreak(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 263                            const uint8_t Duration)
 264 {
 265         USB_ControlRequest = (USB_Request_Header_t)
 266         {
 267                 .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
 268                 .bRequest      = CDC_REQ_SendBreak,
 269                 .wValue        = Duration,
 270                 .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
 271                 .wLength       = 0,
 272         };
 273
 274         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 275
 276         return USB_Host_SendControlRequest(NULL);
 277 }
 278
 279 uint8_t CDC_Host_SendData(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 280                           const uint8_t* const Buffer,
 281                           const uint16_t Length)
 282 {
 283         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 284           return PIPE_READYWAIT_DeviceDisconnected;
 285
 286         uint8_t ErrorCode;
 287
 288         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 289
 290         Pipe_Unfreeze();
 291         ErrorCode = Pipe_Write_Stream_LE(Buffer, Length, NULL);
 292         Pipe_Freeze();
 293
 294         return ErrorCode;
 295 }
 296
 297 uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 298                             const char* const String)
 299 {
 300         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 301           return PIPE_READYWAIT_DeviceDisconnected;
 302
 303         uint8_t ErrorCode;
 304
 305         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 306
 307         Pipe_Unfreeze();
 308         ErrorCode = Pipe_Write_Stream_LE(String, strlen(String), NULL);
 309         Pipe_Freeze();
 310
 311         return ErrorCode;
 312 }
 313
 314 uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 315                           const uint8_t Data)
 316 {
 317         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 318           return PIPE_READYWAIT_DeviceDisconnected;
 319
 320         uint8_t ErrorCode;
 321
 322         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 323         Pipe_Unfreeze();
 324
 325         if (!(Pipe_IsReadWriteAllowed()))
 326         {
 327                 Pipe_ClearOUT();
 328
 329                 if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
 330                   return ErrorCode;
 331         }
 332
 333         Pipe_Write_8(Data);
 334         Pipe_Freeze();
 335
 336         return PIPE_READYWAIT_NoError;
 337 }
 338
 339 uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 340 {
 341         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 342           return 0;
 343
 344         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipe.Address);
 345         Pipe_Unfreeze();
 346
 347         if (Pipe_IsINReceived())
 348         {
 349                 if (!(Pipe_BytesInPipe()))
 350                 {
 351                         Pipe_ClearIN();
 352                         Pipe_Freeze();
 353                         return 0;
 354                 }
 355                 else
 356                 {
 357                         Pipe_Freeze();
 358                         return Pipe_BytesInPipe();
 359                 }
 360         }
 361         else
 362         {
 363                 Pipe_Freeze();
 364
 365                 return 0;
 366         }
 367 }
 368
 369 int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 370 {
 371         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 372           return -1;
 373
 374         int16_t ReceivedByte = -1;
 375
 376         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipe.Address);
 377         Pipe_Unfreeze();
 378
 379         if (Pipe_IsINReceived())
 380         {
 381                 if (Pipe_BytesInPipe())
 382                   ReceivedByte = Pipe_Read_8();
 383
 384                 if (!(Pipe_BytesInPipe()))
 385                   Pipe_ClearIN();
 386         }
 387
 388         Pipe_Freeze();
 389
 390         return ReceivedByte;
 391 }
 392
 393 uint8_t CDC_Host_Flush(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 394 {
 395         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 396           return PIPE_READYWAIT_DeviceDisconnected;
 397
 398         uint8_t ErrorCode;
 399
 400         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 401         Pipe_Unfreeze();
 402
 403         if (!(Pipe_BytesInPipe()))
 404           return PIPE_READYWAIT_NoError;
 405
 406         bool BankFull = !(Pipe_IsReadWriteAllowed());
 407
 408         Pipe_ClearOUT();
 409
 410         if (BankFull)
 411         {
 412                 if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
 413                   return ErrorCode;
 414
 415                 Pipe_ClearOUT();
 416         }
 417
 418         Pipe_Freeze();
 419
 420         return PIPE_READYWAIT_NoError;
 421 }
 422
 423 #if defined(FDEV_SETUP_STREAM)
 424 void CDC_Host_CreateStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 425                            FILE* const Stream)
 426 {
 427         *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar, _FDEV_SETUP_RW);
 428         fdev_set_udata(Stream, CDCInterfaceInfo);
 429 }
 430
 431 void CDC_Host_CreateBlockingStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 432                                    FILE* const Stream)
 433 {
 434         *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar_Blocking, _FDEV_SETUP_RW);
 435         fdev_set_udata(Stream, CDCInterfaceInfo);
 436 }
 437
 438 static int CDC_Host_putchar(char c,
 439                             FILE* Stream)
 440 {
 441         return CDC_Host_SendByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
 442 }
 443
 444 static int CDC_Host_getchar(FILE* Stream)
 445 {
 446         int16_t ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
 447
 448         if (ReceivedByte < 0)
 449           return _FDEV_EOF;
 450
 451         return ReceivedByte;
 452 }
 453
 454 static int CDC_Host_getchar_Blocking(FILE* Stream)
 455 {
 456         int16_t ReceivedByte;
 457
 458         while ((ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream))) < 0)
 459         {
 460                 if (USB_HostState == HOST_STATE_Unattached)
 461                   return _FDEV_EOF;
 462
 463                 CDC_Host_USBTask((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
 464                 USB_USBTask();
 465         }
 466
 467         return ReceivedByte;
 468 }
 469 #endif
 470
 471 // cppcheck-suppress unusedFunction
 472 void CDC_Host_Event_Stub(void)
 473 {
 474
 475 }
 476
 477 #endif
 478