LUFA/Drivers/USB/Class/Device/Audio.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_DEVICE)
  35
  36 #define  __INCLUDE_FROM_AUDIO_DRIVER
  37 #define  __INCLUDE_FROM_AUDIO_DEVICE_C
  38 #include "Audio.h"
  39
  40 void Audio_Device_ProcessControlRequest(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
  41 {
  42         if (!(Endpoint_IsSETUPReceived()))
  43           return;
  44
  45         if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_RECIPIENT) == REQREC_INTERFACE)
  46         {
  47                 if (USB_ControlRequest.wIndex != AudioInterfaceInfo->Config.StreamingInterfaceNumber)
  48                   return;
  49         }
  50         else if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_RECIPIENT) == REQREC_ENDPOINT)
  51         {
  52                 bool EndpointFilterMatch = false;
  53
  54                 EndpointFilterMatch |= (AudioInterfaceInfo->Config.DataINEndpointNumber &&
  55                                         ((uint8_t)USB_ControlRequest.wIndex == (ENDPOINT_DESCRIPTOR_DIR_IN  | AudioInterfaceInfo->Config.DataINEndpointNumber)));
  56
  57                 EndpointFilterMatch |= (AudioInterfaceInfo->Config.DataOUTEndpointNumber &&
  58                                         ((uint8_t)USB_ControlRequest.wIndex == (ENDPOINT_DESCRIPTOR_DIR_OUT | AudioInterfaceInfo->Config.DataOUTEndpointNumber)));
  59
  60                 if (!(EndpointFilterMatch))
  61                   return;
  62         }
  63
  64         switch (USB_ControlRequest.bRequest)
  65         {
  66                 case REQ_SetInterface:
  67                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE))
  68                         {
  69                                 Endpoint_ClearSETUP();
  70                                 Endpoint_ClearStatusStage();
  71
  72                                 AudioInterfaceInfo->State.InterfaceEnabled = ((USB_ControlRequest.wValue & 0xFF) != 0);
  73                                 EVENT_Audio_Device_StreamStartStop(AudioInterfaceInfo);
  74                         }
  75
  76                         break;
  77                 case AUDIO_REQ_GetStatus:
  78                         if ((USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) ||
  79                             (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT)))
  80                         {
  81                                 Endpoint_ClearSETUP();
  82                                 Endpoint_ClearStatusStage();
  83                         }
  84
  85                         break;
  86                 case AUDIO_REQ_SetCurrent:
  87                 case AUDIO_REQ_SetMinimum:
  88                 case AUDIO_REQ_SetMaximum:
  89                 case AUDIO_REQ_SetResolution:
  90                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT))
  91                         {
  92                                 uint8_t EndpointProperty = USB_ControlRequest.bRequest;
  93                                 uint8_t EndpointAddress  = (uint8_t)USB_ControlRequest.wIndex;
  94                                 uint8_t EndpointControl  = (USB_ControlRequest.wValue >> 8);
  95
  96                                 if (CALLBACK_Audio_Device_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointAddress,
  97                                                                                  EndpointControl, NULL, NULL))
  98                                 {
  99                                         uint16_t ValueLength = USB_ControlRequest.wLength;
 100                                         uint8_t  Value[ValueLength];
 101
 102                                         Endpoint_ClearSETUP();
 103                                         Endpoint_Read_Control_Stream_LE(Value, ValueLength);
 104                                         Endpoint_ClearIN();
 105
 106                                         CALLBACK_Audio_Device_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointAddress,
 107                                                                                      EndpointControl, &ValueLength, Value);
 108                                 }
 109                         }
 110
 111                         break;
 112                 case AUDIO_REQ_GetCurrent:
 113                 case AUDIO_REQ_GetMinimum:
 114                 case AUDIO_REQ_GetMaximum:
 115                 case AUDIO_REQ_GetResolution:
 116                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
 117                         {
 118                                 uint8_t  EndpointProperty = USB_ControlRequest.bRequest;
 119                                 uint8_t  EndpointAddress  = (uint8_t)USB_ControlRequest.wIndex;
 120                                 uint8_t  EndpointControl  = (USB_ControlRequest.wValue >> 8);
 121                                 uint16_t ValueLength      = USB_ControlRequest.wLength;
 122                                 uint8_t  Value[ValueLength];
 123
 124                                 if (CALLBACK_Audio_Device_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointAddress,
 125                                                                                  EndpointControl, &ValueLength, Value))
 126                                 {
 127                                         Endpoint_ClearSETUP();
 128                                         Endpoint_Write_Control_Stream_LE(Value, ValueLength);
 129                                         Endpoint_ClearOUT();
 130                                 }
 131                         }
 132
 133                         break;
 134         }
 135 }
 136
 137 bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 138 {
 139         memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
 140
 141         for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
 142         {
 143                 uint16_t Size;
 144                 uint8_t  Type;
 145                 uint8_t  Direction;
 146
 147                 if (EndpointNum == AudioInterfaceInfo->Config.DataINEndpointNumber)
 148                 {
 149                         Size         = AudioInterfaceInfo->Config.DataINEndpointSize;
 150                         Direction    = ENDPOINT_DIR_IN;
 151                         Type         = EP_TYPE_ISOCHRONOUS;
 152                 }
 153                 else if (EndpointNum == AudioInterfaceInfo->Config.DataOUTEndpointNumber)
 154                 {
 155                         Size         = AudioInterfaceInfo->Config.DataOUTEndpointSize;
 156                         Direction    = ENDPOINT_DIR_OUT;
 157                         Type         = EP_TYPE_ISOCHRONOUS;
 158                 }
 159                 else
 160                 {
 161                         continue;
 162                 }
 163
 164                 if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size, ENDPOINT_BANK_DOUBLE)))
 165                   return false;
 166         }
 167
 168         return true;
 169 }
 170
 171 void Audio_Device_Event_Stub(void)
 172 {
 173
 174 }
 175
 176 #endif