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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2015.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2015  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 CDC_ENUMERROR_PipeConfigurationFailed;
 116
 117         if (!(Pipe_ConfigurePipeTable(&CDCInterfaceInfo->Config.DataOUTPipe, 1)))
 118           return CDC_ENUMERROR_PipeConfigurationFailed;
 119
 120         if (!(Pipe_ConfigurePipeTable(&CDCInterfaceInfo->Config.NotificationPipe, 1)))
 121           return CDC_ENUMERROR_PipeConfigurationFailed;
 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 void* 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_SendData_P(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 298                           const void* const Buffer,
 299                           const uint16_t Length)
 300 {
 301         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 302           return PIPE_READYWAIT_DeviceDisconnected;
 303
 304         uint8_t ErrorCode;
 305
 306         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 307
 308         Pipe_Unfreeze();
 309         ErrorCode = Pipe_Write_PStream_LE(Buffer, Length, NULL);
 310         Pipe_Freeze();
 311
 312         return ErrorCode;
 313 }
 314
 315 uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 316                             const char* const String)
 317 {
 318         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 319           return PIPE_READYWAIT_DeviceDisconnected;
 320
 321         uint8_t ErrorCode;
 322
 323         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 324
 325         Pipe_Unfreeze();
 326         ErrorCode = Pipe_Write_Stream_LE(String, strlen(String), NULL);
 327         Pipe_Freeze();
 328
 329         return ErrorCode;
 330 }
 331
 332 uint8_t CDC_Host_SendString_P(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 333                             const char* const String)
 334 {
 335         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 336           return PIPE_READYWAIT_DeviceDisconnected;
 337
 338         uint8_t ErrorCode;
 339
 340         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 341
 342         Pipe_Unfreeze();
 343         ErrorCode = Pipe_Write_PStream_LE(String, strlen_P(String), NULL);
 344         Pipe_Freeze();
 345
 346         return ErrorCode;
 347 }
 348
 349 uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 350                           const uint8_t Data)
 351 {
 352         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 353           return PIPE_READYWAIT_DeviceDisconnected;
 354
 355         uint8_t ErrorCode;
 356
 357         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 358         Pipe_Unfreeze();
 359
 360         if (!(Pipe_IsReadWriteAllowed()))
 361         {
 362                 Pipe_ClearOUT();
 363
 364                 if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
 365                   return ErrorCode;
 366         }
 367
 368         Pipe_Write_8(Data);
 369         Pipe_Freeze();
 370
 371         return PIPE_READYWAIT_NoError;
 372 }
 373
 374 uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 375 {
 376         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 377           return 0;
 378
 379         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipe.Address);
 380         Pipe_Unfreeze();
 381
 382         if (Pipe_IsINReceived())
 383         {
 384                 if (!(Pipe_BytesInPipe()))
 385                 {
 386                         Pipe_ClearIN();
 387                         Pipe_Freeze();
 388                         return 0;
 389                 }
 390                 else
 391                 {
 392                         Pipe_Freeze();
 393                         return Pipe_BytesInPipe();
 394                 }
 395         }
 396         else
 397         {
 398                 Pipe_Freeze();
 399
 400                 return 0;
 401         }
 402 }
 403
 404 int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 405 {
 406         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 407           return -1;
 408
 409         int16_t ReceivedByte = -1;
 410
 411         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipe.Address);
 412         Pipe_Unfreeze();
 413
 414         if (Pipe_IsINReceived())
 415         {
 416                 if (Pipe_BytesInPipe())
 417                   ReceivedByte = Pipe_Read_8();
 418
 419                 if (!(Pipe_BytesInPipe()))
 420                   Pipe_ClearIN();
 421         }
 422
 423         Pipe_Freeze();
 424
 425         return ReceivedByte;
 426 }
 427
 428 uint8_t CDC_Host_Flush(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 429 {
 430         if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
 431           return PIPE_READYWAIT_DeviceDisconnected;
 432
 433         uint8_t ErrorCode;
 434
 435         Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipe.Address);
 436         Pipe_Unfreeze();
 437
 438         if (!(Pipe_BytesInPipe()))
 439           return PIPE_READYWAIT_NoError;
 440
 441         bool BankFull = !(Pipe_IsReadWriteAllowed());
 442
 443         Pipe_ClearOUT();
 444
 445         if (BankFull)
 446         {
 447                 if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
 448                   return ErrorCode;
 449
 450                 Pipe_ClearOUT();
 451         }
 452
 453         Pipe_Freeze();
 454
 455         return PIPE_READYWAIT_NoError;
 456 }
 457
 458 #if defined(FDEV_SETUP_STREAM)
 459 void CDC_Host_CreateStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 460                            FILE* const Stream)
 461 {
 462         *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar, _FDEV_SETUP_RW);
 463         fdev_set_udata(Stream, CDCInterfaceInfo);
 464 }
 465
 466 void CDC_Host_CreateBlockingStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
 467                                    FILE* const Stream)
 468 {
 469         *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar_Blocking, _FDEV_SETUP_RW);
 470         fdev_set_udata(Stream, CDCInterfaceInfo);
 471 }
 472
 473 static int CDC_Host_putchar(char c,
 474                             FILE* Stream)
 475 {
 476         return CDC_Host_SendByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
 477 }
 478
 479 static int CDC_Host_getchar(FILE* Stream)
 480 {
 481         int16_t ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
 482
 483         if (ReceivedByte < 0)
 484           return _FDEV_EOF;
 485
 486         return ReceivedByte;
 487 }
 488
 489 static int CDC_Host_getchar_Blocking(FILE* Stream)
 490 {
 491         int16_t ReceivedByte;
 492
 493         while ((ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream))) < 0)
 494         {
 495                 if (USB_HostState == HOST_STATE_Unattached)
 496                   return _FDEV_EOF;
 497
 498                 CDC_Host_USBTask((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
 499                 USB_USBTask();
 500         }
 501
 502         return ReceivedByte;
 503 }
 504 #endif
 505
 506 void CDC_Host_Event_Stub(void)
 507 {
 508
 509 }
 510
 511 #endif
 512