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_StreamStartStopChange(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_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointAddress, EndpointControl, NULL, NULL))
  97                                 {
  98                                         uint16_t ValueLength = USB_ControlRequest.wLength;
  99                                         uint8_t  Value[ValueLength];
 100
 101                                         Endpoint_ClearSETUP();
 102                                         Endpoint_Read_Control_Stream_LE(Value, ValueLength);
 103                                         Endpoint_ClearIN();
 104
 105                                         CALLBACK_Audio_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointAddress, EndpointControl, &ValueLength, Value);
 106                                 }
 107                         }
 108
 109                         break;
 110                 case AUDIO_REQ_GetCurrent:
 111                 case AUDIO_REQ_GetMinimum:
 112                 case AUDIO_REQ_GetMaximum:
 113                 case AUDIO_REQ_GetResolution:
 114                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
 115                         {
 116                                 uint8_t  EndpointProperty = USB_ControlRequest.bRequest;
 117                                 uint8_t  EndpointAddress  = (uint8_t)USB_ControlRequest.wIndex;
 118                                 uint8_t  EndpointControl  = (USB_ControlRequest.wValue >> 8);
 119                                 uint16_t ValueLength      = USB_ControlRequest.wLength;
 120                                 uint8_t  Value[ValueLength];
 121
 122                                 if (CALLBACK_Audio_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointAddress, EndpointControl, &ValueLength, Value))
 123                                 {
 124                                         Endpoint_ClearSETUP();
 125                                         Endpoint_Write_Control_Stream_LE(Value, ValueLength);
 126                                         Endpoint_ClearOUT();
 127                                 }
 128                         }
 129
 130                         break;
 131         }
 132 }
 133
 134 bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 135 {
 136         memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
 137
 138         for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
 139         {
 140                 uint16_t Size;
 141                 uint8_t  Type;
 142                 uint8_t  Direction;
 143
 144                 if (EndpointNum == AudioInterfaceInfo->Config.DataINEndpointNumber)
 145                 {
 146                         Size         = AudioInterfaceInfo->Config.DataINEndpointSize;
 147                         Direction    = ENDPOINT_DIR_IN;
 148                         Type         = EP_TYPE_ISOCHRONOUS;
 149                 }
 150                 else if (EndpointNum == AudioInterfaceInfo->Config.DataOUTEndpointNumber)
 151                 {
 152                         Size         = AudioInterfaceInfo->Config.DataOUTEndpointSize;
 153                         Direction    = ENDPOINT_DIR_OUT;
 154                         Type         = EP_TYPE_ISOCHRONOUS;
 155                 }
 156                 else
 157                 {
 158                         continue;
 159                 }
 160
 161                 if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size, ENDPOINT_BANK_DOUBLE)))
 162                   return false;
 163         }
 164
 165         return true;
 166 }
 167
 168 void Audio_Device_Event_Stub(void)
 169 {
 170
 171 }
 172
 173 #endif