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Diffstat (limited to 'sound/usb/usbaudio.h')
-rw-r--r--sound/usb/usbaudio.h12
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)