firmware/target/coldfire/wmcodec-coldfire.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id:$
   9  *
  10  * Coldfire specific code for Wolfson audio codecs based on
  11  * wmcodec-pp.c
  12  *
  13  * Based on code from the ipodlinux project - http://ipodlinux.org/
  14  * Adapted for Rockbox in December 2005
  15  *
  16  * Original file: linux/arch/armnommu/mach-ipod/audio.c
  17  *
  18  * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
  19  *
  20  * This program is free software; you can redistribute it and/or
  21  * modify it under the terms of the GNU General Public License
  22  * as published by the Free Software Foundation; either version 2
  23  * of the License, or (at your option) any later version.
  24  *
  25  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  26  * KIND, either express or implied.
  27  *
  28  ****************************************************************************/
  29 #include "system.h"
  30 #include "audiohw.h"
  31 #include "i2c-coldfire.h"
  32 #include "i2s.h"
  33 #include "wmcodec.h"
  34
  35 #if defined(MPIO_HD200)
  36 #define I2C_CODEC_ADDRESS 0x34
  37 #define I2C_IFACE I2C_IFACE_1
  38 #endif
  39
  40 void audiohw_init(void)
  41 {
  42     audiohw_preinit();
  43 }
  44
  45 void wmcodec_write(int reg, int data)
  46 {
  47     unsigned char wmdata[2];
  48     wmdata[0] = (reg << 1) | ((data & 0x100)>>8);
  49     wmdata[1] = data & 0xff;
  50     i2c_write(I2C_IFACE,I2C_CODEC_ADDRESS,wmdata,2);
  51     return;
  52 }