diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
new file mode 100644
index 0000000..eecbf19
--- /dev/null
+++ b/sound/usb/usbaudio.h
@@ -0,0 +1,251 @@
+#ifndef __USBAUDIO_H
+#define __USBAUDIO_H
+/*
+ *   (Tentative) USB Audio Driver for ALSA
+ *
+ *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+
+/*
+ */
+
+#define USB_SUBCLASS_AUDIO_CONTROL	0x01
+#define USB_SUBCLASS_AUDIO_STREAMING	0x02
+#define USB_SUBCLASS_MIDI_STREAMING	0x03
+#define USB_SUBCLASS_VENDOR_SPEC	0xff
+
+#define CS_AUDIO_UNDEFINED		0x20
+#define CS_AUDIO_DEVICE			0x21
+#define CS_AUDIO_CONFIGURATION		0x22
+#define CS_AUDIO_STRING			0x23
+#define CS_AUDIO_INTERFACE		0x24
+#define CS_AUDIO_ENDPOINT		0x25
+
+#define HEADER				0x01
+#define INPUT_TERMINAL			0x02
+#define OUTPUT_TERMINAL			0x03
+#define MIXER_UNIT			0x04
+#define SELECTOR_UNIT			0x05
+#define FEATURE_UNIT			0x06
+#define PROCESSING_UNIT			0x07
+#define EXTENSION_UNIT			0x08
+
+#define AS_GENERAL			0x01
+#define FORMAT_TYPE			0x02
+#define FORMAT_SPECIFIC			0x03
+
+#define EP_GENERAL			0x01
+
+#define MS_GENERAL			0x01
+#define MIDI_IN_JACK			0x02
+#define MIDI_OUT_JACK			0x03
+
+/* endpoint attributes */
+#define EP_ATTR_MASK			0x0c
+#define EP_ATTR_ASYNC			0x04
+#define EP_ATTR_ADAPTIVE		0x08
+#define EP_ATTR_SYNC			0x0c
+
+/* cs endpoint attributes */
+#define EP_CS_ATTR_SAMPLE_RATE		0x01
+#define EP_CS_ATTR_PITCH_CONTROL	0x02
+#define EP_CS_ATTR_FILL_MAX		0x80
+
+/* Audio Class specific Request Codes */
+
+#define SET_CUR    0x01
+#define GET_CUR    0x81
+#define SET_MIN    0x02
+#define GET_MIN    0x82
+#define SET_MAX    0x03
+#define GET_MAX    0x83
+#define SET_RES    0x04
+#define GET_RES    0x84
+#define SET_MEM    0x05
+#define GET_MEM    0x85
+#define GET_STAT   0xff
+
+/* Terminal Control Selectors */
+
+#define COPY_PROTECT_CONTROL       0x01
+
+/* Endpoint Control Selectors */
+
+#define SAMPLING_FREQ_CONTROL      0x01
+#define PITCH_CONTROL              0x02
+
+/* Format Types */
+#define USB_FORMAT_TYPE_I	0x01
+#define USB_FORMAT_TYPE_II	0x02
+#define USB_FORMAT_TYPE_III	0x03
+
+/* type I */
+#define USB_AUDIO_FORMAT_PCM	0x01
+#define USB_AUDIO_FORMAT_PCM8	0x02
+#define USB_AUDIO_FORMAT_IEEE_FLOAT	0x03
+#define USB_AUDIO_FORMAT_ALAW	0x04
+#define USB_AUDIO_FORMAT_MU_LAW	0x05
+
+/* type II */
+#define USB_AUDIO_FORMAT_MPEG	0x1001
+#define USB_AUDIO_FORMAT_AC3	0x1002
+
+/* type III */
+#define USB_AUDIO_FORMAT_IEC1937_AC3	0x2001
+#define USB_AUDIO_FORMAT_IEC1937_MPEG1_LAYER1	0x2002
+#define USB_AUDIO_FORMAT_IEC1937_MPEG2_NOEXT	0x2003
+#define USB_AUDIO_FORMAT_IEC1937_MPEG2_EXT	0x2004
+#define USB_AUDIO_FORMAT_IEC1937_MPEG2_LAYER1_LS	0x2005
+#define USB_AUDIO_FORMAT_IEC1937_MPEG2_LAYER23_LS	0x2006
+
+
+/* maximum number of endpoints per interface */
+#define MIDI_MAX_ENDPOINTS 2
+
+/*
+ */
+
+typedef struct snd_usb_audio snd_usb_audio_t;
+
+struct snd_usb_audio {
+	int index;
+	struct usb_device *dev;
+	snd_card_t *card;
+	int shutdown;
+	int num_interfaces;
+
+	struct list_head pcm_list;	/* list of pcm streams */
+	int pcm_devs;
+
+	struct list_head midi_list;	/* list of midi interfaces */
+	int next_midi_device;
+
+	unsigned int ignore_ctl_error;	/* for mixer */
+};
+
+/*
+ * Information about devices with broken descriptors
+ */
+
+/* special values for .ifnum */
+#define QUIRK_NO_INTERFACE		-2
+#define QUIRK_ANY_INTERFACE		-1
+
+/* quirk type */
+#define QUIRK_MIDI_FIXED_ENDPOINT	0
+#define QUIRK_MIDI_YAMAHA		1
+#define QUIRK_MIDI_MIDIMAN		2
+#define QUIRK_COMPOSITE			3
+#define QUIRK_AUDIO_FIXED_ENDPOINT	4
+#define QUIRK_AUDIO_STANDARD_INTERFACE	5
+#define QUIRK_MIDI_STANDARD_INTERFACE	6
+#define QUIRK_AUDIO_EDIROL_UA700_UA25	7
+#define QUIRK_AUDIO_EDIROL_UA1000	8
+#define QUIRK_IGNORE_INTERFACE		9
+#define QUIRK_MIDI_NOVATION		10
+#define QUIRK_MIDI_MOTU			11
+#define QUIRK_MIDI_EMAGIC		12
+
+typedef struct snd_usb_audio_quirk snd_usb_audio_quirk_t;
+typedef struct snd_usb_midi_endpoint_info snd_usb_midi_endpoint_info_t;
+
+struct snd_usb_audio_quirk {
+	const char *vendor_name;
+	const char *product_name;
+	int16_t ifnum;
+	int16_t type;
+	const void *data;
+};
+
+/* data for QUIRK_MIDI_FIXED_ENDPOINT */
+struct snd_usb_midi_endpoint_info {
+	int8_t   out_ep;	/* ep number, 0 autodetect */
+	uint8_t  out_interval;	/* interval for interrupt endpoints */
+	int8_t   in_ep;	
+	uint8_t  in_interval;
+	uint16_t out_cables;	/* bitmask */
+	uint16_t in_cables;	/* bitmask */
+};
+
+/* for QUIRK_MIDI_YAMAHA, data is NULL */
+
+/* for QUIRK_MIDI_MIDIMAN, data points to a snd_usb_midi_endpoint_info
+ * structure (out_cables and in_cables only) */
+
+/* for QUIRK_COMPOSITE, data points to an array of snd_usb_audio_quirk
+ * structures, terminated with .ifnum = -1 */
+
+/* for QUIRK_AUDIO_FIXED_ENDPOINT, data points to an audioformat structure */
+
+/* for QUIRK_AUDIO/MIDI_STANDARD_INTERFACE, data is NULL */
+
+/* for QUIRK_AUDIO_EDIROL_UA700_UA25/UA1000, data is NULL */
+
+/* for QUIRK_IGNORE_INTERFACE, data is NULL */
+
+/* for QUIRK_MIDI_NOVATION and _MOTU, data is NULL */
+
+/* for QUIRK_MIDI_EMAGIC, data points to a snd_usb_midi_endpoint_info
+ * structure (out_cables and in_cables only) */
+
+/*
+ */
+
+#define combine_word(s)    ((*s) | ((unsigned int)(s)[1] << 8))
+#define combine_triple(s)  (combine_word(s) | ((unsigned int)(s)[2] << 16))
+#define combine_quad(s)    (combine_triple(s) | ((unsigned int)(s)[3] << 24))
+
+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);
+
+int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif);
+
+int snd_usb_create_midi_interface(snd_usb_audio_t *chip, struct usb_interface *iface, const snd_usb_audio_quirk_t *quirk);
+void snd_usbmidi_input_stop(struct list_head* p);
+void snd_usbmidi_input_start(struct list_head* p);
+void snd_usbmidi_disconnect(struct list_head *p, struct usb_driver *driver);
+
+/*
+ * 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 usb_pipe_needs_resubmit
+#define usb_pipe_needs_resubmit(pipe) 1
+#endif
+
+#ifndef snd_usb_complete_callback
+#define snd_usb_complete_callback(x) (x)
+#endif
+
+#ifndef snd_usb_get_speed
+#define snd_usb_get_speed(dev) ((dev)->speed)
+#endif
+
+#endif /* __USBAUDIO_H */