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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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 disclaims 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.DataINPipe.Address  && !(DataINEndpoint)) ||
  55                (AudioInterfaceInfo->Config.DataOUTPipe.Address && !(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         AudioInterfaceInfo->Config.DataINPipe.Size   = le16_to_cpu(DataINEndpoint->EndpointSize);
  97         AudioInterfaceInfo->Config.DataINPipe.EndpointAddress = DataINEndpoint->EndpointAddress;
  98         AudioInterfaceInfo->Config.DataINPipe.Type   = EP_TYPE_ISOCHRONOUS;
  99         AudioInterfaceInfo->Config.DataINPipe.Banks  = 2;
 100
 101         AudioInterfaceInfo->Config.DataOUTPipe.Size  = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 102         AudioInterfaceInfo->Config.DataOUTPipe.EndpointAddress = DataOUTEndpoint->EndpointAddress;
 103         AudioInterfaceInfo->Config.DataOUTPipe.Type  = EP_TYPE_ISOCHRONOUS;
 104         AudioInterfaceInfo->Config.DataOUTPipe.Banks = 2;
 105
 106         if (!(Pipe_ConfigurePipeTable(&AudioInterfaceInfo->Config.DataINPipe, 1)))
 107           return AUDIO_ENUMERROR_PipeConfigurationFailed;
 108
 109         if (!(Pipe_ConfigurePipeTable(&AudioInterfaceInfo->Config.DataOUTPipe, 1)))
 110           return AUDIO_ENUMERROR_PipeConfigurationFailed;
 111
 112         AudioInterfaceInfo->State.ControlInterfaceNumber    = AudioControlInterface->InterfaceNumber;
 113         AudioInterfaceInfo->State.StreamingInterfaceNumber  = AudioStreamingInterface->InterfaceNumber;
 114         AudioInterfaceInfo->State.EnabledStreamingAltIndex  = AudioStreamingInterface->AlternateSetting;
 115         AudioInterfaceInfo->State.IsActive = true;
 116
 117         return AUDIO_ENUMERROR_NoError;
 118 }
 119
 120 static uint8_t DCOMP_Audio_Host_NextAudioControlInterface(void* CurrentDescriptor)
 121 {
 122         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 123
 124         if (Header->Type == DTYPE_Interface)
 125         {
 126                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
 127
 128                 if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&
 129                     (Interface->SubClass == AUDIO_CSCP_ControlSubclass) &&
 130                     (Interface->Protocol == AUDIO_CSCP_ControlProtocol))
 131                 {
 132                         return DESCRIPTOR_SEARCH_Found;
 133                 }
 134         }
 135
 136         return DESCRIPTOR_SEARCH_NotFound;
 137 }
 138
 139 static uint8_t DCOMP_Audio_Host_NextAudioStreamInterface(void* CurrentDescriptor)
 140 {
 141         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 142
 143         if (Header->Type == DTYPE_Interface)
 144         {
 145                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
 146
 147                 if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&
 148                     (Interface->SubClass == AUDIO_CSCP_AudioStreamingSubclass) &&
 149                     (Interface->Protocol == AUDIO_CSCP_StreamingProtocol))
 150                 {
 151                         return DESCRIPTOR_SEARCH_Found;
 152                 }
 153         }
 154
 155         return DESCRIPTOR_SEARCH_NotFound;
 156 }
 157
 158 static uint8_t DCOMP_Audio_Host_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)
 159 {
 160         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
 161
 162         if (Header->Type == DTYPE_Endpoint)
 163         {
 164                 USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
 165
 166                 if ((Endpoint->Attributes & EP_TYPE_MASK) == EP_TYPE_ISOCHRONOUS)
 167                   return DESCRIPTOR_SEARCH_Found;
 168         }
 169         else if (Header->Type == DTYPE_Interface)
 170         {
 171                 return DESCRIPTOR_SEARCH_Fail;
 172         }
 173
 174         return DESCRIPTOR_SEARCH_NotFound;
 175 }
 176
 177 uint8_t Audio_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
 178                                                   const bool EnableStreaming)
 179 {
 180         if (!(AudioInterfaceInfo->State.IsActive))
 181           return HOST_SENDCONTROL_DeviceDisconnected;
 182
 183         return USB_Host_SetInterfaceAltSetting(AudioInterfaceInfo->State.StreamingInterfaceNumber,
 184                                                EnableStreaming ? AudioInterfaceInfo->State.EnabledStreamingAltIndex : 0);
 185 }
 186
 187 uint8_t Audio_Host_GetSetEndpointProperty(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,
 188                                                       const uint8_t DataPipeIndex,
 189                                                       const uint8_t EndpointProperty,
 190                                                       const uint8_t EndpointControl,
 191                                                       const uint16_t DataLength,
 192                                                       void* const Data)
 193 {
 194         if (!(AudioInterfaceInfo->State.IsActive))
 195           return HOST_SENDCONTROL_DeviceDisconnected;
 196
 197         uint8_t RequestType;
 198         uint8_t EndpointAddress;
 199
 200         if (EndpointProperty & 0x80)
 201           RequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT);
 202         else
 203           RequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT);
 204
 205         Pipe_SelectPipe(DataPipeIndex);
 206         EndpointAddress = Pipe_GetBoundEndpointAddress();
 207
 208         USB_ControlRequest = (USB_Request_Header_t)
 209                 {
 210                         .bmRequestType = RequestType,
 211                         .bRequest      = EndpointProperty,
 212                         .wValue        = ((uint16_t)EndpointControl << 8),
 213                         .wIndex        = EndpointAddress,
 214                         .wLength       = DataLength,
 215                 };
 216
 217         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 218
 219         return USB_Host_SendControlRequest(Data);
 220 }
 221
 222 #endif
 223