1 files changed, 32 insertions, 0 deletions

diff --git a/sound/usb/helper.h b/sound/usb/helper.h
new file mode 100644
index 000000000000..a6b0e51b3a9a
--- /dev/null
+++ b/sound/usb/helper.h
@@ -0,0 +1,32 @@
+#ifndef __USBAUDIO_HELPER_H
+#define __USBAUDIO_HELPER_H
+
+unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
+
+void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
+void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
+
+int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
+                    __u8 request, __u8 requesttype, __u16 value, __u16 index,
+                    void *data, __u16 size, int timeout);
+
+unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip,
+                                         struct usb_host_interface *alts);
+
+/*
+ * retrieve usb_interface descriptor from the host interface
+ * (conditional for compatibility with the older API)
+ */
+#ifndef get_iface_desc
+#define get_iface_desc(iface)   (&(iface)->desc)
+#define get_endpoint(alt,ep)    (&(alt)->endpoint[ep].desc)
+#define get_ep_desc(ep)         (&(ep)->desc)
+#define get_cfg_desc(cfg)       (&(cfg)->desc)
+#endif
+
+#ifndef snd_usb_get_speed
+#define snd_usb_get_speed(dev) ((dev)->speed)
+#endif
+
+
+#endif /* __USBAUDIO_HELPER_H */