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diff --git a/linux/drivers/media/video/tea6420.h b/linux/drivers/media/video/tea6420.h
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+++ b/linux/drivers/media/video/tea6420.h
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+ /*
+    tea6420.h - definitions for the i2c-driver
+                for the tea6420 by SGS Thomson
+
+    Copyright (C) 1998,1999,2000 Michael Hunold <michael@mihu.de>
+
+    The tea6420 is a bus controlled audio-matrix with 5 stereo inputs,
+    4 stereo outputs and gain control for each output.
+    It is cascadable, i.e. it can be found at the adresses 0x98
+    and 0x9a on the i2c-bus.
+    
+    For detailed informations download the specifications directly
+    from SGS Thomson at http://www.st.com
+    
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __INCLUDED_TEA6420__
+#define __INCLUDED_TEA6420__
+
+/* possible addresses */
+#define	I2C_TEA6420_1		0x4c
+#define	I2C_TEA6420_2		0x4d
+
+struct audio_multiplex
+{
+	int	in;	/* input of audio switch */
+	int	out;	/* output of audio switch  */
+	int	gain;	/* gain of connection */
+};
+
+#define TEA6420_SWITCH		_IOW('t',1,struct audio_multiplex)
+
+#endif