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 MaxConfigBufferSize)
  38 {
  39         uint8_t* ConfigDescriptorData;
  40         uint16_t ConfigDescriptorSize;
  41         uint8_t  FoundEndpoints = 0;
  42
  43         if (USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful)
  44           return CDC_ENUMERROR_ControlError;
  45
  46         if (ConfigDescriptorSize > MaxConfigBufferSize)
  47           return CDC_ENUMERROR_DescriptorTooLarge;
  48
  49         ConfigDescriptorData = alloca(ConfigDescriptorSize);
  50
  51         USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData);
  52
  53         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
  54           return CDC_ENUMERROR_InvalidConfigDataReturned;
  55
  56         if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  57                                       DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  58         {
  59                 return CDC_ENUMERROR_NoCDCInterfaceFound;
  60         }
  61
  62         while (FoundEndpoints != (CDC_FOUND_DATAPIPE_IN | CDC_FOUND_DATAPIPE_OUT | CDC_FOUND_DATAPIPE_NOTIFICATION))
  63         {
  64                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  65                                               DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  66                 {
  67                         if (FoundEndpoints & CDC_FOUND_DATAPIPE_NOTIFICATION)
  68                         {
  69                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  70                                                               DComp_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  71                                 {
  72                                         return CDC_ENUMERROR_NoCDCInterfaceFound;
  73                                 }
  74                         }
  75                         else
  76                         {
  77                                 FoundEndpoints = 0;
  78
  79                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
  80                                 Pipe_DisablePipe();
  81                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
  82                                 Pipe_DisablePipe();
  83                                 Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
  84                                 Pipe_DisablePipe();
  85
  86                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  87                                                               DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  88                                 {
  89                                         return CDC_ENUMERROR_NoCDCInterfaceFound;
  90                                 }
  91                         }
  92
  93                         if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  94                                                       DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  95                         {
  96                                 return CDC_ENUMERROR_EndpointsNotFound;
  97                         }
  98                 }
  99
 100                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
 101
 102                 if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
 103                 {
 104                         if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
 105                         {
 106                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.NotificationPipeNumber, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
 107                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
 108                                 CDCInterfaceInfo->State.NotificationPipeSize = EndpointData->EndpointSize;
 109
 110                                 Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
 111
 112                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_NOTIFICATION;
 113                         }
 114                 }
 115                 else
 116                 {
 117                         if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
 118                         {
 119                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_IN,
 120                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
 121                                 CDCInterfaceInfo->State.DataINPipeSize = EndpointData->EndpointSize;
 122
 123                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_IN;
 124                         }
 125                         else
 126                         {
 127                                 Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_OUT,
 128                                                                    EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
 129                                 CDCInterfaceInfo->State.DataOUTPipeSize = EndpointData->EndpointSize;
 130
 131                                 FoundEndpoints |= CDC_FOUND_DATAPIPE_OUT;
 132                         }
 133                 }
 134         }
 135
 136         return CDC_ENUMERROR_NoError;
 137 }
 138
 139 static uint8_t DComp_CDC_Host_NextCDCControlInterface(void* CurrentDescriptor)
 140 {
 141         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 142         {
 143                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
 144                                                                                 USB_Descriptor_Interface_t);
 145
 146                 if ((CurrentInterface->Class    == CDC_CONTROL_CLASS)    &&
 147                     (CurrentInterface->SubClass == CDC_CONTROL_SUBCLASS) &&
 148                         (CurrentInterface->Protocol == CDC_CONTROL_PROTOCOL))
 149                 {
 150                         return DESCRIPTOR_SEARCH_Found;
 151                 }
 152         }
 153
 154         return DESCRIPTOR_SEARCH_NotFound;
 155 }
 156
 157 static uint8_t DComp_CDC_Host_NextCDCDataInterface(void* CurrentDescriptor)
 158 {
 159         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 160         {
 161                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
 162                                                                                 USB_Descriptor_Interface_t);
 163
 164                 if ((CurrentInterface->Class    == CDC_DATA_CLASS)    &&
 165                     (CurrentInterface->SubClass == CDC_DATA_SUBCLASS) &&
 166                         (CurrentInterface->Protocol == CDC_DATA_PROTOCOL))
 167                 {
 168                         return DESCRIPTOR_SEARCH_Found;
 169                 }
 170         }
 171
 172         return DESCRIPTOR_SEARCH_NotFound;
 173 }
 174
 175 static uint8_t DComp_CDC_Host_NextInterfaceCDCDataEndpoint(void* CurrentDescriptor)
 176 {
 177         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
 178         {
 179                 USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
 180                                                                               USB_Descriptor_Endpoint_t);
 181
 182                 uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
 183
 184                 if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&
 185                     !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
 186                 {
 187                         return DESCRIPTOR_SEARCH_Found;
 188                 }
 189         }
 190         else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 191         {
 192                 return DESCRIPTOR_SEARCH_Fail;
 193         }
 194
 195         return DESCRIPTOR_SEARCH_NotFound;
 196 }
 197
 198 void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo)
 199 {
 200
 201 }
 202
 203 #endif