1 files changed, 21 insertions, 0 deletions

diff --git a/sound/usb/urb.h b/sound/usb/urb.h
new file mode 100644
index 000000000000..888da38079cf
--- /dev/null
+++ b/sound/usb/urb.h
@@ -0,0 +1,21 @@
+#ifndef __USBAUDIO_URB_H
+#define __USBAUDIO_URB_H
+
+void snd_usb_init_substream(struct snd_usb_stream *as,
+                            int stream,
+                            struct audioformat *fp);
+
+int snd_usb_init_substream_urbs(struct snd_usb_substream *subs,
+                                unsigned int period_bytes,
+                                unsigned int rate,
+                                unsigned int frame_bits);
+
+void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force);
+
+int snd_usb_substream_prepare(struct snd_usb_substream *subs,
+                              struct snd_pcm_runtime *runtime);
+
+int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd);
+int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd);
+
+#endif /* __USBAUDIO_URB_H */