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         memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));
  43
  44         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
  45           return CDC_ENUMERROR_InvalidConfigDescriptor;
  46
  47         if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  48                                       DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  49         {
  50                 return CDC_ENUMERROR_NoCDCInterfaceFound;
  51         }
  52
  53         while (FoundEndpoints != (CDC_FOUND_DATAPIPE_IN | CDC_FOUND_DATAPIPE_OUT | CDC_FOUND_DATAPIPE_NOTIFICATION))
  54         {
  55                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  56                                               DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  57                 {
  58                         if (FoundEndpoints & CDC_FOUND_DATAPIPE_NOTIFICATION)
  59                         {
  60                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  61                                                               DComp_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  62                                 {
  63                                         return CDC_ENUMERROR_NoCDCInterfaceFound;
  64                                 }
  65                         }
  66                         else
  67                         {
  68                                 FoundEndpoints = 0;
  69
  70                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
  71                                 Pipe_DisablePipe();
  72                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
  73                                 Pipe_DisablePipe();
  74                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
  75                                 Pipe_DisablePipe();
  76
  77                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  78                                                               DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  79                                 {
  80                                         return CDC_ENUMERROR_NoCDCInterfaceFound;
  81                                 }
  82                         }
  83
  84                         if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  85                                                       DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  86                         {
  87                                 return CDC_ENUMERROR_EndpointsNotFound;
  88                         }
  89                 }
  90
  91                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
  92
  93                 if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
  94                 {
  95                         if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
  96                         {
  97                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.NotificationPipeNumber, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
  98                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
  99                                 CDCInterfaceInfo->State.NotificationPipeSize = EndpointData->EndpointSize;
 100
 101                                 Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
 102
 103                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_NOTIFICATION;
 104                         }
 105                 }
 106                 else
 107                 {
 108                         if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
 109                         {
 110                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_IN,
 111                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
 112                                 CDCInterfaceInfo->State.DataINPipeSize = EndpointData->EndpointSize;
 113
 114                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_IN;
 115                         }
 116                         else
 117                         {
 118                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_OUT,
 119                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
 120                                 CDCInterfaceInfo->State.DataOUTPipeSize = EndpointData->EndpointSize;
 121
 122                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_OUT;
 123                         }
 124                 }
 125         }
 126
 127         return CDC_ENUMERROR_NoError;
 128 }
 129
 130 static uint8_t DComp_CDC_Host_NextCDCControlInterface(void* CurrentDescriptor)
 131 {
 132         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 133         {
 134                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
 135                                                                                 USB_Descriptor_Interface_t);
 136
 137                 if ((CurrentInterface->Class    == CDC_CONTROL_CLASS)    &&
 138                     (CurrentInterface->SubClass == CDC_CONTROL_SUBCLASS) &&
 139                         (CurrentInterface->Protocol == CDC_CONTROL_PROTOCOL))
 140                 {
 141                         return DESCRIPTOR_SEARCH_Found;
 142                 }
 143         }
 144
 145         return DESCRIPTOR_SEARCH_NotFound;
 146 }
 147
 148 static uint8_t DComp_CDC_Host_NextCDCDataInterface(void* CurrentDescriptor)
 149 {
 150         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 151         {
 152                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
 153                                                                                 USB_Descriptor_Interface_t);
 154
 155                 if ((CurrentInterface->Class    == CDC_DATA_CLASS)    &&
 156                     (CurrentInterface->SubClass == CDC_DATA_SUBCLASS) &&
 157                         (CurrentInterface->Protocol == CDC_DATA_PROTOCOL))
 158                 {
 159                         return DESCRIPTOR_SEARCH_Found;
 160                 }
 161         }
 162
 163         return DESCRIPTOR_SEARCH_NotFound;
 164 }
 165
 166 static uint8_t DComp_CDC_Host_NextInterfaceCDCDataEndpoint(void* CurrentDescriptor)
 167 {
 168         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
 169         {
 170                 USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
 171                                                                               USB_Descriptor_Endpoint_t);
 172
 173                 uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
 174
 175                 if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&
 176                     !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
 177                 {
 178                         return DESCRIPTOR_SEARCH_Found;
 179                 }
 180         }
 181         else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 182         {
 183                 return DESCRIPTOR_SEARCH_Fail;
 184         }
 185
 186         return DESCRIPTOR_SEARCH_NotFound;
 187 }
 188
 189 void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo)
 190 {
 191
 192 }
 193
 194 #endif