diff options
Diffstat (limited to 'sound/usb/usbaudio.h')
| -rw-r--r-- | sound/usb/usbaudio.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 43d4029edab4..b0f042c99608 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -21,6 +21,15 @@ struct media_intf_devnode; #define MAX_CARD_INTERFACES 16 +/* + * Structure holding assosiation between Audio Control Interface + * and given Streaming or Midi Interface. + */ +struct snd_intf_to_ctrl { + u8 interface; + struct usb_host_interface *ctrl_intf; +}; + struct snd_usb_audio { int index; struct usb_device *dev; @@ -63,6 +72,9 @@ struct snd_usb_audio { struct usb_host_interface *ctrl_intf; /* the audio control interface */ struct media_device *media_dev; struct media_intf_devnode *ctl_intf_media_devnode; + + unsigned int num_intf_to_ctrl; + struct snd_intf_to_ctrl intf_to_ctrl[MAX_CARD_INTERFACES]; }; #define USB_AUDIO_IFACE_UNUSED ((void *)-1L) |