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 /* Set the audio source for IIS TX */
  27 void audio_set_output_source(int source)
  28 {
  29     switch (source)
  30     {
  31     default:
  32     case AUDIO_SRC_PLAYBACK:
  33         /* Receive data from PORT2 (SSI2) */
  34         AUDMUX_PDCR4 = AUDMUX_PDCR_RXDSEL_PORT2;
  35         /* wmc_clear(WMC_COMPANDING_CTRL, WMC_LOOPBACK); */
  36         break;
  37
  38     case AUDIO_SRC_FMRADIO:
  39         /* External source - receive data from self (loopback to TX) */
  40         AUDMUX_PDCR4 = AUDMUX_PDCR_RXDSEL_PORT4;
  41         /* wmc_set(WMC_COMPANDING_CTRL, WMC_LOOPBACK); */
  42         break;
  43     }
  44 }
  45
  46 void audio_input_mux(int source, unsigned int flags)
  47 {
  48     /* Prevent pops from unneeded switching */
  49     static int last_source = AUDIO_SRC_PLAYBACK;
  50     bool recording = flags & SRCF_RECORDING;
  51     static bool last_recording = false;
  52
  53     switch (source)
  54     {
  55         default:
  56             source = AUDIO_SRC_PLAYBACK;
  57             /* Fallthrough */
  58         case AUDIO_SRC_PLAYBACK: /* playback - no recording */
  59             if (source != last_source)
  60                 audiohw_set_recsrc(AUDIO_SRC_PLAYBACK, false);
  61             break;
  62
  63         case AUDIO_SRC_FMRADIO: /* recording and playback */
  64             if (source != last_source || recording != last_recording)
  65                 audiohw_set_recsrc(AUDIO_SRC_FMRADIO, recording);
  66             break;
  67     }
  68
  69     last_source = source;
  70     last_recording = recording;
  71 }
  72