LUFA/Drivers/USB/Class/Host/HID.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_HID_CLASS_HOST_C
  35 #include "HID.h"
  36
  37 uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo, 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 HID_ENUMERROR_ControlError;
  45
  46         if (ConfigDescriptorSize > MaxConfigBufferSize)
  47           return HID_ENUMERROR_DescriptorTooLarge;
  48
  49         ConfigDescriptorData = alloca(ConfigDescriptorSize);
  50
  51         USB_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData);
  52
  53         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
  54           return HID_ENUMERROR_InvalidConfigDataReturned;
  55
  56         do
  57         {
  58                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  59                                                                           DComp_HID_Host_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  60                 {
  61                         return HID_ENUMERROR_NoHIDInterfaceFound;
  62                 }
  63         } while (HIDInterfaceInfo->Config.MatchInterfaceProtocol &&
  64                  DESCRIPTOR_PCAST(ConfigDescriptorData,
  65                                   USB_Descriptor_Interface_t)->HIDInterfaceProtocol != HIDInterfaceInfo->Config.Protocol);
  66
  67         while (FoundEndpoints != ((1 << HID_FOUND_DATAPIPE_IN) | (1 << HID_FOUND_DATAPIPE_OUT)))
  68         {
  69                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  70                                               DComp_HID_Host_NextInterfaceHIDDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  71                 {
  72                         if (FoundEndpoints == (1 << HID_FOUND_DATAPIPE_IN))
  73                           break;
  74
  75                         return HID_ENUMERROR_EndpointsNotFound;
  76                 }
  77
  78                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
  79
  80                 if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
  81                 {
  82                         Pipe_ConfigurePipe(HIDInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
  83                                                            EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
  84
  85                         FoundEndpoints |= (1 << HID_FOUND_DATAPIPE_IN);
  86                 }
  87                 else
  88                 {
  89                         Pipe_ConfigurePipe(HIDInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_INTERRUPT, PIPE_TOKEN_OUT,
  90                                                            EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
  91
  92                         FoundEndpoints |= (1 << HID_FOUND_DATAPIPE_OUT);
  93                 }
  94         }
  95
  96         return HID_ENUMERROR_NoError;
  97 }
  98
  99 static uint8_t DComp_HID_Host_NextHIDInterface(void* CurrentDescriptor)
 100 {
 101         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 102         {
 103                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
 104                                                                                 USB_Descriptor_Interface_t);
 105
 106                 if (CurrentInterface->Class == HID_INTERFACE_CLASS)
 107                   return DESCRIPTOR_SEARCH_Found;
 108         }
 109
 110         return DESCRIPTOR_SEARCH_NotFound;
 111 }
 112
 113 static uint8_t DComp_HID_Host_NextInterfaceHIDDataEndpoint(void* CurrentDescriptor)
 114 {
 115         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
 116         {
 117                 USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
 118                                                                               USB_Descriptor_Endpoint_t);
 119
 120                 if (!(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
 121                   return DESCRIPTOR_SEARCH_Found;
 122         }
 123         else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 124         {
 125                 return DESCRIPTOR_SEARCH_Fail;
 126         }
 127
 128         return DESCRIPTOR_SEARCH_NotFound;
 129 }
 130
 131 void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo)
 132 {
 133
 134 }
 135
 136 #endif