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/*
tda9840.h - definitions for the i2c-driver
for the tda9840 by SGS Thomson
Copyright (C) 1998,1999,2000 Michael Hunold <michael@mihu.de>
The tda9840 is a stereo/dual sound processor with digital
identification. It can be found at address 0x84 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_TDA9840__
#define __INCLUDED_TDA9840__
#define I2C_TDA9840 0x42
/* I'm using the currently unused letter 'd' for
identifying. perhaps this will be changed in the
future.
(see /usr/src/linux/Documentation/ioctl-number.txt
for further details.) */
#define TDA9840_DETECT _IOR('d',1,int)
/* return values for TDA9840_DETCT */
#define TDA9840_MONO_DETECT 0x0
#define TDA9840_DUAL_DETECT 0x1
#define TDA9840_STEREO_DETECT 0x2
#define TDA9840_INCORRECT_DETECT 0x3
#define TDA9840_SWITCH _IOW('d',2,int)
/* modes than can be set with TDA9840_SWITCH */
#define TDA9840_SET_MUTE 0x00
#define TDA9840_SET_MONO 0x10
#define TDA9840_SET_STEREO 0x2a
#define TDA9840_SET_LANG1 0x12
#define TDA9840_SET_LANG2 0x1e
#define TDA9840_SET_BOTH 0x1a
#define TDA9840_SET_BOTH_R 0x16
#define TDA9840_SET_EXTERNAL 0x7a
/* values may range between +2.5 and -2.0;
the value has to be multiplied with 10 */
#define TDA9840_LEVEL_ADJUST _IOW('d',3,int)
/* values may range between +2.5 and -2.4;
the value has to be multiplied with 10 */
#define TDA9840_STEREO_ADJUST _IOW('d',4,int)
/* currently not implemented */
#define TDA9840_TEST _IOW('d',5,int)
#endif
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