firmware/target/arm/wmcodec-telechips.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * TCC specific code for Wolfson audio codecs
  11  *
  12  * Based on code from the ipodlinux project - http://ipodlinux.org/
  13  * Adapted for Rockbox in December 2005
  14  *
  15  * Original file: linux/arch/armnommu/mach-ipod/audio.c
  16  *
  17  * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
  18  *
  19  * This program is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU General Public License
  21  * as published by the Free Software Foundation; either version 2
  22  * of the License, or (at your option) any later version.
  23  *
  24  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  25  * KIND, either express or implied.
  26  *
  27  ****************************************************************************/
  28
  29 #include "system.h"
  30 #include "audiohw.h"
  31 #include "i2c.h"
  32 #include "wmcodec.h"
  33
  34 #if defined(COWON_D2)
  35 /* The D2's audio codec uses an I2C address of 0x34 */
  36 #define I2C_AUDIO_ADDRESS 0x34
  37 #elif defined (IAUDIO_7) || defined(LOGIK_DAX) || defined(SANSA_M200)
  38 #define I2C_AUDIO_ADDRESS 0x34
  39 #else
  40 #error wmcodec not implemented for this target!
  41 #endif
  42
  43
  44 void audiohw_init(void)
  45 {
  46 #if defined(HAVE_WM8731) || defined(HAVE_WM8751) || defined(HAVE_WM8985)
  47     audiohw_preinit();
  48 #endif
  49 }
  50
  51 void wmcodec_write(int reg, int data)
  52 {
  53     unsigned char d[2];
  54     d[0] = (reg << 1) | ((data & 0x100) >> 8);
  55     d[1] = data;
  56
  57     i2c_write(I2C_AUDIO_ADDRESS, d, 2);
  58 }