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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all 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 #define  __INCLUDE_FROM_USB_DRIVER
  32 #include "../../Core/USBMode.h"
  33
  34 #if defined(USB_CAN_BE_HOST)
  35
  36 #define  __INCLUDE_FROM_AUDIO_DRIVER
  37 #define  __INCLUDE_FROM_AUDIO_HOST_C
  38 #include "AudioClassHost.h"
  39
  40 uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
  41                                   uint16_t ConfigDescriptorSize,
  42                                   void* ConfigDescriptorData)
  43 {
  44         USB_Descriptor_Endpoint_t*  DataINEndpoint          = NULL;
  45         USB_Descriptor_Endpoint_t*  DataOUTEndpoint         = NULL;
  46         USB_Descriptor_Interface_t* AudioControlInterface   = NULL;
  47         USB_Descriptor_Interface_t* AudioStreamingInterface = NULL;
  48
  49         memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
  50
  51         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
  52           return AUDIO_ENUMERROR_InvalidConfigDescriptor;
  53
  54         while ((AudioInterfaceInfo->Config.DataINPipeNumber  && !(DataINEndpoint)) ||
  55                (AudioInterfaceInfo->Config.DataOUTPipeNumber && !(DataOUTEndpoint)))
  56         {
  57                 if (!(AudioControlInterface) ||
  58                     USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  59                                               DCOMP_Audio_Host_NextAudioInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  60                 {
  61                         if (!(AudioControlInterface) ||
  62                             USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  63                                                       DCOMP_Audio_Host_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  64                         {
  65                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  66                                                               DCOMP_Audio_Host_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  67                                 {
  68                                         return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
  69                                 }
  70
  71                                 AudioControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
  72
  73                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
  74                                                               DCOMP_Audio_Host_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  75                                 {
  76                                         return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;
  77                                 }
  78                         }
  79
  80                         AudioStreamingInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
  81
  82                         DataINEndpoint  = NULL;
  83                         DataOUTEndpoint = NULL;
  84
  85                         continue;
  86                 }
  87
  88                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
  89
  90                 if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN)
  91                   DataINEndpoint  = EndpointData;
  92                 else
  93                   DataOUTEndpoint = EndpointData;
  94         }
  95
  96         for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
  97         {
  98                 uint16_t Size;
  99                 uint8_t  Type;
 100                 uint8_t  Token;
 101                 uint8_t  EndpointAddress;
 102                 bool     DoubleBanked;
 103
 104                 if (PipeNum == AudioInterfaceInfo->Config.DataINPipeNumber)
 105                 {
 106                         Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 107                         EndpointAddress = DataINEndpoint->EndpointAddress;
 108                         Token           = PIPE_TOKEN_IN;
 109                         Type            = EP_TYPE_ISOCHRONOUS;
 110                         DoubleBanked    = true;
 111
 112                         AudioInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
 113                 }
 114                 else if (PipeNum == AudioInterfaceInfo->Config.DataOUTPipeNumber)
 115                 {
 116                         Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 117                         EndpointAddress = DataOUTEndpoint->EndpointAddress;
 118                         Token           = PIPE_TOKEN_OUT;
 119                         Type            = EP_TYPE_ISOCHRONOUS;
 120                         DoubleBanked    = true;
 121
 122                         AudioInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
 123                 }
 124                 else
 125                 {
 126                         continue;
 127                 }
 128
 129                 if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
 130                                          DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
 131                 {
 132                         return AUDIO_ENUMERROR_PipeConfigurationFailed;
 133                 }
 134         }
 135
 136         AudioInterfaceInfo->State.ControlInterfaceNumber    = AudioControlInterface->InterfaceNumber;
 137         AudioInterfaceInfo->State.StreamingInterfaceNumber  = AudioStreamingInterface->InterfaceNumber;
 138         AudioInterfaceInfo->State.EnabledStreamingAltIndex  = AudioStreamingInterface->AlternateSetting;
 139         AudioInterfaceInfo->State.IsActive = true;
 140
 141         return AUDIO_ENUMERROR_NoError;
 142 }
 143
 144 static uint8_t DCOMP_Audio_Host_NextAudioControlInterface(void* CurrentDescriptor)
 145 {
 146         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 147
 148         if (Header->Type == DTYPE_Interface)
 149         {
 150                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
 151
 152                 if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&
 153                     (Interface->SubClass == AUDIO_CSCP_ControlSubclass) &&
 154                     (Interface->Protocol == AUDIO_CSCP_ControlProtocol))
 155                 {
 156                         return DESCRIPTOR_SEARCH_Found;
 157                 }
 158         }
 159
 160         return DESCRIPTOR_SEARCH_NotFound;
 161 }
 162
 163 static uint8_t DCOMP_Audio_Host_NextAudioStreamInterface(void* CurrentDescriptor)
 164 {
 165         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 166
 167         if (Header->Type == DTYPE_Interface)
 168         {
 169                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
 170
 171                 if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&
 172                     (Interface->SubClass == AUDIO_CSCP_AudioStreamingSubclass) &&
 173                     (Interface->Protocol == AUDIO_CSCP_StreamingProtocol))
 174                 {
 175                         return DESCRIPTOR_SEARCH_Found;
 176                 }
 177         }
 178
 179         return DESCRIPTOR_SEARCH_NotFound;
 180 }
 181
 182 static uint8_t DCOMP_Audio_Host_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)
 183 {
 184         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 185
 186         if (Header->Type == DTYPE_Endpoint)
 187         {
 188                 USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
 189
 190                 if ((Endpoint->Attributes & EP_TYPE_MASK) == EP_TYPE_ISOCHRONOUS)
 191                   return DESCRIPTOR_SEARCH_Found;
 192         }
 193         else if (Header->Type == DTYPE_Interface)
 194         {
 195                 return DESCRIPTOR_SEARCH_Fail;
 196         }
 197
 198         return DESCRIPTOR_SEARCH_NotFound;
 199 }
 200
 201 uint8_t Audio_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
 202                                                   const bool EnableStreaming)
 203 {
 204         if (!(AudioInterfaceInfo->State.IsActive))
 205           return HOST_SENDCONTROL_DeviceDisconnected;
 206
 207         return USB_Host_SetInterfaceAltSetting(AudioInterfaceInfo->State.StreamingInterfaceNumber,
 208                                                EnableStreaming ? AudioInterfaceInfo->State.EnabledStreamingAltIndex : 0);
 209 }
 210
 211 uint8_t Audio_Host_GetSetEndpointProperty(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
 212                                                       const uint8_t DataPipeIndex,
 213                                                       const uint8_t EndpointProperty,
 214                                                       const uint8_t EndpointControl,
 215                                                       const uint16_t DataLength,
 216                                                       void* const Data)
 217 {
 218         if (!(AudioInterfaceInfo->State.IsActive))
 219           return HOST_SENDCONTROL_DeviceDisconnected;
 220
 221         uint8_t RequestType;
 222         uint8_t EndpointAddress;
 223
 224         if (EndpointProperty & 0x80)
 225           RequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT);
 226         else
 227           RequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT);
 228
 229         Pipe_SelectPipe(DataPipeIndex);
 230         EndpointAddress = Pipe_GetBoundEndpointAddress();
 231
 232         USB_ControlRequest = (USB_Request_Header_t)
 233                 {
 234                         .bmRequestType = RequestType,
 235                         .bRequest      = EndpointProperty,
 236                         .wValue        = ((uint16_t)EndpointControl << 8),
 237                         .wIndex        = EndpointAddress,
 238                         .wLength       = DataLength,
 239                 };
 240
 241         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 242
 243         return USB_Host_SendControlRequest(Data);
 244 }
 245
 246 #endif
 247