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  * All files in this archive are subject to the GNU General Public License.
  20  * See the file COPYING in the source tree root for full license agreement.
  21  *
  22  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  23  * KIND, either express or implied.
  24  *
  25  ****************************************************************************/
  26
  27 #include "system.h"
  28 #include "audiohw.h"
  29 #include "i2c.h"
  30
  31 #if defined(COWON_D2)
  32 /* The D2's audio codec uses an I2C address of 0x34 */
  33 #define I2C_AUDIO_ADDRESS 0x34
  34 #else
  35 #error wmcodec not implemented for this target!
  36 #endif
  37
  38
  39 void audiohw_init(void)
  40 {
  41     #warning function not implemented
  42 }
  43
  44 void wmcodec_write(int reg, int data)
  45 {
  46     unsigned char d[2];
  47     d[0] = (reg << 1) | ((data & 0x100) >> 8);
  48     d[1] = data;
  49
  50     i2c_write(I2C_AUDIO_ADDRESS, d, 2);
  51 }