firmware/export/dac3550a.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id: dac.h 24158 2010-01-03 11:31:14Z Buschel $
   9  *
  10  * Copyright (C) 2002 by Linus Nielsen Feltzing
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef _DAC3550A_H_
  22 #define _DAC3550A_H_
  23
  24 #include "config.h"
  25
  26 /*
  27     DAC I2C defs
  28 */
  29 #define DAC_ADR         0x9a
  30 #define DAC_DEV_WRITE   (DAC_ADR | 0x00)
  31
  32 #define DAC_REG_WRITE   0xc0
  33
  34 /* registers..*/
  35 #define DAC_SR_REG      1
  36 #define DAC_AVOL        2
  37 #define DAC_GCFG        3
  38
  39 /* function prototypes */
  40 extern int  tenthdb2reg(int db);
  41 extern int  dac_volume(unsigned int left, unsigned int right, bool deemph);
  42 extern void dac_enable(bool enable);
  43 extern void dac_line_in(bool enable);
  44 extern void dac_init(void);
  45
  46 #endif /* _DAC3550A_H_ */
  47