LUFA/Drivers/USB/Class/Host/MIDI.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_MIDI_CLASS_HOST_C
  35 #include "MIDI.h"
  36
  37 uint8_t MIDI_Host_ConfigurePipes(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo, uint16_t ConfigDescriptorSize,
  38                                  void* ConfigDescriptorData)
  39 {
  40         uint8_t FoundEndpoints = 0;
  41
  42         memset(&MIDIInterfaceInfo->State, 0x00, sizeof(MIDIInterfaceInfo->State));
  43
  44         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
  45           return MIDI_ENUMERROR_InvalidConfigDescriptor;
  46
  47         if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  48                                       DComp_MIDI_Host_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  49         {
  50                 return MIDI_ENUMERROR_NoStreamingInterfaceFound;
  51         }
  52
  53         while (FoundEndpoints != (MIDI_FOUND_DATAPIPE_IN | MIDI_FOUND_DATAPIPE_OUT))
  54         {
  55                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  56                                               DComp_MIDI_Host_NextMIDIStreamingDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  57                 {
  58                         return MIDI_ENUMERROR_EndpointsNotFound;
  59                 }
  60
  61                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
  62
  63                 if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
  64                 {
  65                         Pipe_ConfigurePipe(MIDIInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_IN,
  66                                                            EndpointData->EndpointAddress, EndpointData->EndpointSize,
  67                                                            MIDIInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
  68                         MIDIInterfaceInfo->State.DataINPipeSize = EndpointData->EndpointSize;
  69
  70                         FoundEndpoints |= MIDI_FOUND_DATAPIPE_IN;
  71                 }
  72                 else
  73                 {
  74                         Pipe_ConfigurePipe(MIDIInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_OUT,
  75                                                            EndpointData->EndpointAddress, EndpointData->EndpointSize,
  76                                                            MIDIInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
  77                         MIDIInterfaceInfo->State.DataOUTPipeSize = EndpointData->EndpointSize;
  78
  79                         FoundEndpoints |= MIDI_FOUND_DATAPIPE_OUT;
  80                 }
  81         }
  82
  83         MIDIInterfaceInfo->State.IsActive = true;
  84         return MIDI_ENUMERROR_NoError;
  85 }
  86
  87 static uint8_t DComp_MIDI_Host_NextMIDIStreamingInterface(void* const CurrentDescriptor)
  88 {
  89         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
  90         {
  91                 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
  92                                                                                 USB_Descriptor_Interface_t);
  93
  94                 if ((CurrentInterface->Class    == MIDI_STREAMING_CLASS)    &&
  95                     (CurrentInterface->SubClass == MIDI_STREAMING_SUBCLASS) &&
  96                     (CurrentInterface->Protocol == MIDI_STREAMING_PROTOCOL))
  97                 {
  98                         return DESCRIPTOR_SEARCH_Found;
  99                 }
 100         }
 101
 102         return DESCRIPTOR_SEARCH_NotFound;
 103 }
 104
 105 static uint8_t DComp_MIDI_Host_NextMIDIStreamingDataEndpoint(void* const CurrentDescriptor)
 106 {
 107         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
 108         {
 109                 USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
 110                                                                               USB_Descriptor_Endpoint_t);
 111
 112                 uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
 113
 114                 if ((EndpointType == EP_TYPE_BULK) && !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
 115                   return DESCRIPTOR_SEARCH_Found;
 116         }
 117         else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 118         {
 119                 return DESCRIPTOR_SEARCH_Fail;
 120         }
 121
 122         return DESCRIPTOR_SEARCH_NotFound;
 123 }
 124
 125 void MIDI_Host_USBTask(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo)
 126 {
 127
 128 }
 129
 130 uint8_t MIDI_Host_SendEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo, MIDI_EventPacket_t* const Event)
 131 {
 132         if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
 133           return HOST_SENDCONTROL_DeviceDisconnect;
 134
 135         Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipeNumber);
 136
 137         if (Pipe_IsReadWriteAllowed());
 138         {
 139                 uint8_t ErrorCode;
 140
 141                 if ((ErrorCode = Pipe_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != PIPE_RWSTREAM_NoError)
 142                   return ErrorCode;
 143
 144                 Pipe_ClearOUT();
 145         }
 146
 147         return PIPE_RWSTREAM_NoError;
 148 }
 149
 150 bool MIDI_Host_ReceiveEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo, MIDI_EventPacket_t* const Event)
 151 {
 152         if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
 153           return HOST_SENDCONTROL_DeviceDisconnect;
 154
 155         Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataINPipeNumber);
 156
 157         if (!(Pipe_IsReadWriteAllowed()))
 158           return false;
 159
 160         Pipe_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
 161         Pipe_ClearIN();
 162
 163         return true;
 164 }
 165
 166 #endif