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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 #include "../../HighLevel/USBMode.h"
  32 #if defined(USB_CAN_BE_HOST)
  33
  34 #define  INCLUDE_FROM_CDC_CLASS_HOST_C
  35 #include "CDC.h"
  36
  37 uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, uint16_t ConfigDescriptorSize,
  38                                 uint8_t* ConfigDescriptorData)
  39 {
  40         uint8_t  FoundEndpoints = 0;
  41
  42         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
  43           return CDC_ENUMERROR_InvalidConfigDescriptor;
  44
  45         if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  46                                       DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  47         {
  48                 return CDC_ENUMERROR_NoCDCInterfaceFound;
  49         }
  50
  51         while (FoundEndpoints != (CDC_FOUND_DATAPIPE_IN | CDC_FOUND_DATAPIPE_OUT | CDC_FOUND_DATAPIPE_NOTIFICATION))
  52         {
  53                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  54                                               DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  55                 {
  56                         if (FoundEndpoints & CDC_FOUND_DATAPIPE_NOTIFICATION)
  57                         {
  58                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  59                                                               DComp_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  60                                 {
  61                                         return CDC_ENUMERROR_NoCDCInterfaceFound;
  62                                 }
  63                         }
  64                         else
  65                         {
  66                                 FoundEndpoints = 0;
  67
  68                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
  69                                 Pipe_DisablePipe();
  70                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
  71                                 Pipe_DisablePipe();
  72                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
  73                                 Pipe_DisablePipe();
  74
  75                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  76                                                               DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  77                                 {
  78                                         return CDC_ENUMERROR_NoCDCInterfaceFound;
  79                                 }
  80                         }
  81
  82                         if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  83                                                       DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  84                         {
  85                                 return CDC_ENUMERROR_EndpointsNotFound;
  86                         }
  87                 }
  88
  89                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
  90
  91                 if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
  92                 {
  93                         if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
  94                         {
  95                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.NotificationPipeNumber, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
  96                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
  97                                 CDCInterfaceInfo->State.NotificationPipeSize = EndpointData->EndpointSize;
  98
  99                                 Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
 100
 101                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_NOTIFICATION;
 102                         }
 103                 }
 104                 else
 105                 {
 106                         if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
 107                         {
 108                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_IN,
 109                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
 110                                 CDCInterfaceInfo->State.DataINPipeSize = EndpointData->EndpointSize;
 111
 112                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_IN;
 113                         }
 114                         else
 115                         {
 116                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_OUT,
 117                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
 118                                 CDCInterfaceInfo->State.DataOUTPipeSize = EndpointData->EndpointSize;
 119
 120                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_OUT;
 121                         }
 122                 }
 123         }
 124
 125         return CDC_ENUMERROR_NoError;
 126 }
 127
 128 static uint8_t DComp_CDC_Host_NextCDCControlInterface(void* CurrentDescriptor)
 129 {
 130         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 131         {
 132                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
 133                                                                                 USB_Descriptor_Interface_t);
 134
 135                 if ((CurrentInterface->Class    == CDC_CONTROL_CLASS)    &&
 136                     (CurrentInterface->SubClass == CDC_CONTROL_SUBCLASS) &&
 137                         (CurrentInterface->Protocol == CDC_CONTROL_PROTOCOL))
 138                 {
 139                         return DESCRIPTOR_SEARCH_Found;
 140                 }
 141         }
 142
 143         return DESCRIPTOR_SEARCH_NotFound;
 144 }
 145
 146 static uint8_t DComp_CDC_Host_NextCDCDataInterface(void* CurrentDescriptor)
 147 {
 148         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 149         {
 150                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
 151                                                                                 USB_Descriptor_Interface_t);
 152
 153                 if ((CurrentInterface->Class    == CDC_DATA_CLASS)    &&
 154                     (CurrentInterface->SubClass == CDC_DATA_SUBCLASS) &&
 155                         (CurrentInterface->Protocol == CDC_DATA_PROTOCOL))
 156                 {
 157                         return DESCRIPTOR_SEARCH_Found;
 158                 }
 159         }
 160
 161         return DESCRIPTOR_SEARCH_NotFound;
 162 }
 163
 164 static uint8_t DComp_CDC_Host_NextInterfaceCDCDataEndpoint(void* CurrentDescriptor)
 165 {
 166         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
 167         {
 168                 USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
 169                                                                               USB_Descriptor_Endpoint_t);
 170
 171                 uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
 172
 173                 if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&
 174                     !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
 175                 {
 176                         return DESCRIPTOR_SEARCH_Found;
 177                 }
 178         }
 179         else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 180         {
 181                 return DESCRIPTOR_SEARCH_Fail;
 182         }
 183
 184         return DESCRIPTOR_SEARCH_NotFound;
 185 }
 186
 187 void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo)
 188 {
 189
 190 }
 191
 192 #endif