firmware/target/coldfire/iaudio/m3/audio-m3.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Michael Sevakis
  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
  22 #include "system.h"
  23 #include "cpu.h"
  24 #include "audio.h"
  25 #include "sound.h"
  26
  27 void audio_set_output_source(int source)
  28 {
  29     int level = set_irq_level(DMA_IRQ_LEVEL);
  30     unsigned long txsrc;
  31
  32     if ((unsigned)source >= AUDIO_NUM_SOURCES)
  33         txsrc = (3 << 8); /* playback, PDOR3 */
  34     else
  35         txsrc = (4 << 8); /* recording, iis1RcvData */
  36
  37     IIS1CONFIG = (IIS1CONFIG & ~(7 << 8)) | txsrc;
  38     restore_irq(level);
  39 } /* audio_set_output_source */
  40
  41 void audio_input_mux(int source, unsigned flags)
  42 {
  43     /* Prevent pops from unneeded switching */
  44     static int last_source = AUDIO_SRC_PLAYBACK;
  45     static bool last_recording = false;
  46
  47     bool recording = flags & SRCF_RECORDING;
  48
  49     switch (source)
  50     {
  51         default:                            /* playback - no recording */
  52             source = AUDIO_SRC_PLAYBACK;
  53         case AUDIO_SRC_PLAYBACK:
  54             if (source != last_source)
  55             {
  56                 audiohw_disable_recording();
  57                 audiohw_set_monitor(false);
  58                 coldfire_set_dataincontrol(0);
  59             }
  60         break;
  61
  62         case AUDIO_SRC_MIC:                 /* recording only */
  63             if (source != last_source)
  64             {
  65                 audiohw_enable_recording(true);  /* source mic */
  66                 /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
  67                 coldfire_set_dataincontrol((3 << 14) | (4 << 3));
  68             }
  69         break;
  70
  71         case AUDIO_SRC_LINEIN:              /* recording only */
  72             if (source != last_source)
  73             {
  74                 audiohw_enable_recording(false); /* source line */
  75                 /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
  76                 coldfire_set_dataincontrol((3 << 14) | (4 << 3));
  77             }
  78         break;
  79
  80         case AUDIO_SRC_FMRADIO:             /* recording and playback */
  81             if (!recording)
  82                 audiohw_set_recvol(23, 23, AUDIO_GAIN_LINEIN);
  83
  84             /* I2S recording and analog playback */
  85             if (source == last_source && recording == last_recording)
  86                 break;
  87
  88             last_recording = recording;
  89
  90             if (recording)
  91             {
  92                 /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
  93                 coldfire_set_dataincontrol((3 << 14) | (4 << 3));
  94                 audiohw_enable_recording(false); /* source line */
  95             }
  96             else
  97             {
  98                 audiohw_disable_recording();
  99                 audiohw_set_monitor(true);       /* analog bypass */
 100                 coldfire_set_dataincontrol(0);
 101             }
 102         break;
 103     } /* end switch */
 104
 105     /* set line multiplexer */
 106     if (source == AUDIO_SRC_FMRADIO)
 107         and_l(~(1 << 25), &GPIO1_OUT);   /* FM radio */
 108     else
 109         or_l((1 << 25), &GPIO1_OUT);     /* Line In */
 110
 111     or_l((1 << 25), &GPIO1_ENABLE);
 112     or_l((1 << 25), &GPIO1_FUNCTION);
 113
 114     last_source = source;
 115 } /* audio_input_mux */
 116