firmware/target/arm/imx31/gigabeat-s/audio-gigabeat-s.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Nils Wallménius
  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 #include "config.h"
  22 #include "system.h"
  23 #include "audiohw.h"
  24 #include "audio.h"
  25
  26 void audiohw_enable_tone_controls(bool enable);
  27 void audiohw_enable_depth_3d(bool enable);
  28
  29 /* Set the audio source for IIS TX */
  30 void audio_set_output_source(int source)
  31 {
  32     switch (source)
  33     {
  34     default:
  35     case AUDIO_SRC_PLAYBACK:
  36         audiohw_enable_tone_controls(true);
  37         audiohw_enable_depth_3d(true);
  38         /* Receive data from PORT2 (SSI2) */
  39         AUDMUX_PDCR4 = AUDMUX_PDCR_RXDSEL_PORT2;
  40         /* wmc_clear(WMC_COMPANDING_CTRL, WMC_LOOPBACK); */
  41         break;
  42
  43     case AUDIO_SRC_FMRADIO:
  44         /* Analog path doesn't support these and digital radio playback
  45          * cannot be done without mixing on the MCU if voice is to be
  46          * heard. Any recording should match what is heard. */
  47         audiohw_enable_tone_controls(false);
  48         audiohw_enable_depth_3d(false);
  49         /* External source - receive data from self (loopback to TX) */
  50         AUDMUX_PDCR4 = AUDMUX_PDCR_RXDSEL_PORT4;
  51         /* wmc_set(WMC_COMPANDING_CTRL, WMC_LOOPBACK); */
  52         break;
  53     }
  54 }
  55
  56 void audio_input_mux(int source, unsigned int flags)
  57 {
  58     /* Prevent pops from unneeded switching */
  59     static int last_source = AUDIO_SRC_PLAYBACK;
  60     bool recording = flags & SRCF_RECORDING;
  61     static bool last_recording = false;
  62
  63     switch (source)
  64     {
  65         default:
  66             source = AUDIO_SRC_PLAYBACK;
  67             /* Fallthrough */
  68         case AUDIO_SRC_PLAYBACK: /* playback - no recording */
  69             if (source != last_source)
  70                 audiohw_set_recsrc(AUDIO_SRC_PLAYBACK, false);
  71             break;
  72
  73         case AUDIO_SRC_FMRADIO: /* recording and playback */
  74             if (source != last_source || recording != last_recording)
  75                 audiohw_set_recsrc(AUDIO_SRC_FMRADIO, recording);
  76             break;
  77     }
  78
  79     last_source = source;
  80     last_recording = recording;
  81 }
  82