firmware/target/coldfire/iaudio/x5/audio-x5.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 #include "system.h"
  22 #include "cpu.h"
  23 #include "audio.h"
  24 #include "sound.h"
  25
  26 void audio_set_output_source(int source)
  27 {
  28     int level = set_irq_level(DMA_IRQ_LEVEL);
  29     unsigned long txsrc;
  30
  31     if ((unsigned)source >= AUDIO_NUM_SOURCES)
  32         txsrc = (3 << 8); /* playback, PDOR3 */
  33     else
  34         txsrc = (4 << 8); /* recording, iis1RcvData */
  35
  36     IIS1CONFIG = (IIS1CONFIG & ~(7 << 8)) | txsrc;
  37     restore_irq(level);
  38 } /* audio_set_output_source */
  39
  40 void audio_input_mux(int source, unsigned flags)
  41 {
  42     /* Prevent pops from unneeded switching */
  43     static int last_source = AUDIO_SRC_PLAYBACK;
  44     static bool last_recording = false;
  45
  46     bool recording = flags & SRCF_RECORDING;
  47
  48     switch (source)
  49     {
  50         default:                            /* playback - no recording */
  51             source = AUDIO_SRC_PLAYBACK;
  52         case AUDIO_SRC_PLAYBACK:
  53             if (source != last_source)
  54             {
  55                 audiohw_disable_recording();
  56                 audiohw_set_monitor(false);
  57                 coldfire_set_dataincontrol(0);
  58             }
  59         break;
  60
  61         case AUDIO_SRC_MIC:                 /* recording only */
  62             if (source != last_source)
  63             {
  64                 audiohw_enable_recording(true);  /* source mic */
  65                 /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
  66                 coldfire_set_dataincontrol((3 << 14) | (4 << 3));
  67             }
  68         break;
  69
  70         case AUDIO_SRC_LINEIN:              /* recording only */
  71             if (source != last_source)
  72             {
  73                 audiohw_enable_recording(false); /* source line */
  74                 /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
  75                 coldfire_set_dataincontrol((3 << 14) | (4 << 3));
  76             }
  77         break;
  78
  79         case AUDIO_SRC_FMRADIO:             /* recording and playback */
  80             if (!recording)
  81                 audiohw_set_recvol(23, 23, AUDIO_GAIN_LINEIN);
  82
  83             /* I2S recording and analog playback */
  84             if (source == last_source && recording == last_recording)
  85                 break;
  86
  87             last_recording = recording;
  88
  89             if (recording)
  90             {
  91                 /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
  92                 coldfire_set_dataincontrol((3 << 14) | (4 << 3));
  93                 audiohw_enable_recording(false); /* source line */
  94             }
  95             else
  96             {
  97                 audiohw_disable_recording();
  98                 audiohw_set_monitor(true);       /* analog bypass */
  99                 coldfire_set_dataincontrol(0);
 100             }
 101         break;
 102     } /* end switch */
 103
 104     /* set line multiplexer */
 105     if (source == AUDIO_SRC_FMRADIO)
 106         and_l(~(1 << 29), &GPIO_OUT);   /* FM radio */
 107     else
 108         or_l((1 << 29), &GPIO_OUT);     /* Line In */
 109
 110     or_l((1 << 29), &GPIO_ENABLE);
 111     or_l((1 << 29), &GPIO_FUNCTION);
 112
 113     last_source = source;
 114 } /* audio_input_mux */
 115