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.wIndex != AudioInterfaceInfo->Config.StreamingInterfaceNumber)
  46           return;
  47
  48         if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_RECIPIENT) == REQREC_INTERFACE)
  49         {
  50                 if (USB_ControlRequest.wIndex != AudioInterfaceInfo->Config.StreamingInterfaceNumber)
  51                   return;
  52         }
  53         else if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_RECIPIENT) == REQREC_ENDPOINT)
  54         {
  55                 if (!((AudioInterfaceInfo->Config.DataINEndpointNumber &&
  56                        (USB_ControlRequest.wIndex == AudioInterfaceInfo->Config.DataINEndpointNumber)) ||
  57                       (AudioInterfaceInfo->Config.DataOUTEndpointNumber &&
  58                        (USB_ControlRequest.wIndex == AudioInterfaceInfo->Config.DataOUTEndpointNumber))))
  59                 {
  60                         return;
  61                 }
  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                         }
  74
  75                         break;
  76                 case AUDIO_REQ_GetStatus:
  77                         if ((USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) ||
  78                             (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT)))
  79                         {
  80                                 Endpoint_ClearSETUP();
  81                                 Endpoint_ClearStatusStage();
  82                         }
  83
  84                         break;
  85                 case AUDIO_REQ_SetCurrent:
  86                 case AUDIO_REQ_SetMinimum:
  87                 case AUDIO_REQ_SetMaximum:
  88                 case AUDIO_REQ_SetResolution:
  89                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT))
  90                         {
  91                                 uint8_t EndpointProperty = USB_ControlRequest.bRequest;
  92                                 uint8_t EndpointIndex    = (uint8_t)USB_ControlRequest.wIndex;
  93                                 uint8_t EndpointControl  = (USB_ControlRequest.wValue >> 8);
  94
  95                                 if (CALLBACK_Audio_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointIndex, EndpointControl, NULL, NULL))
  96                                 {
  97                                         uint16_t ValueLength = USB_ControlRequest.wLength;
  98                                         uint8_t  Value[ValueLength];
  99
 100                                         Endpoint_ClearSETUP();
 101                                         Endpoint_Read_Control_Stream_LE(Value, ValueLength);
 102                                         Endpoint_ClearIN();
 103
 104                                         CALLBACK_Audio_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointIndex, EndpointControl, &ValueLength, Value);
 105                                 }
 106                         }
 107
 108                         break;
 109                 case AUDIO_REQ_GetCurrent:
 110                 case AUDIO_REQ_GetMinimum:
 111                 case AUDIO_REQ_GetMaximum:
 112                 case AUDIO_REQ_GetResolution:
 113                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
 114                         {
 115                                 uint8_t  EndpointProperty = USB_ControlRequest.bRequest;
 116                                 uint8_t  EndpointIndex    = (uint8_t)USB_ControlRequest.wIndex;
 117                                 uint8_t  EndpointControl  = (USB_ControlRequest.wValue >> 8);
 118                                 uint16_t ValueLength      = USB_ControlRequest.wLength;
 119                                 uint8_t  Value[ValueLength];
 120
 121                                 if (CALLBACK_Audio_GetSetEndpointProperty(AudioInterfaceInfo, EndpointProperty, EndpointIndex, EndpointControl, &ValueLength, Value))
 122                                 {
 123                                         Endpoint_ClearSETUP();
 124                                         Endpoint_Write_Control_Stream_LE(Value, ValueLength);
 125                                         Endpoint_ClearOUT();
 126                                 }
 127                         }
 128
 129                         break;
 130         }
 131 }
 132
 133 bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 134 {
 135         memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
 136
 137         for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
 138         {
 139                 uint16_t Size;
 140                 uint8_t  Type;
 141                 uint8_t  Direction;
 142
 143                 if (EndpointNum == AudioInterfaceInfo->Config.DataINEndpointNumber)
 144                 {
 145                         Size         = AudioInterfaceInfo->Config.DataINEndpointSize;
 146                         Direction    = ENDPOINT_DIR_IN;
 147                         Type         = EP_TYPE_ISOCHRONOUS;
 148                 }
 149                 else if (EndpointNum == AudioInterfaceInfo->Config.DataOUTEndpointNumber)
 150                 {
 151                         Size         = AudioInterfaceInfo->Config.DataOUTEndpointSize;
 152                         Direction    = ENDPOINT_DIR_OUT;
 153                         Type         = EP_TYPE_ISOCHRONOUS;
 154                 }
 155                 else
 156                 {
 157                         continue;
 158                 }
 159
 160                 if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size, ENDPOINT_BANK_DOUBLE)))
 161                   return false;
 162         }
 163
 164         return true;
 165 }
 166
 167 #endif