firmware/target/coldfire/mpio/audio-mpio.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 Marcin Bukat
  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 static inline void enable_mclk(bool enable)
  27 {
  28     if(enable)
  29         and_l(~(1<<10), &GPIO1_FUNCTION);
  30     else
  31         or_l((1<<10), &GPIO1_FUNCTION);
  32 }
  33
  34 void audio_set_output_source(int source)
  35 {
  36     static const unsigned char txsrc_select[AUDIO_NUM_SOURCES+1] =
  37     {
  38         [AUDIO_SRC_PLAYBACK+1] = 3, /* PDOR3        */
  39 #if (INPUT_SRC_CAPS & SRC_CAP_MIC)
  40         [AUDIO_SRC_MIC+1]      = 4, /* IIS1 RcvData */
  41 #endif
  42 #if (INPUT_SRC_CAPS & SRC_CAP_LINEIN)
  43         [AUDIO_SRC_LINEIN+1]   = 4, /* IIS1 RcvData */
  44 #endif
  45 #if (INPUT_SRC_CAPS & SRC_CAP_FMRADIO)
  46         [AUDIO_SRC_FMRADIO+1]  = 4, /* IIS1 RcvData */
  47 #endif
  48     };
  49
  50     int level = set_irq_level(DMA_IRQ_LEVEL);
  51
  52     if ((unsigned)source >= AUDIO_NUM_SOURCES)
  53         source = AUDIO_SRC_PLAYBACK;
  54
  55     /* route incoming audio samples to DAC */
  56     IIS2CONFIG = (IIS2CONFIG & ~(7 << 8)) | (txsrc_select[source+1] << 8);
  57
  58     restore_irq(level);
  59 }
  60
  61 void audio_input_mux(int source, unsigned flags)
  62 {
  63     /* Prevent pops from unneeded switching */
  64     static int last_source = AUDIO_SRC_PLAYBACK;
  65     bool recording = flags & SRCF_RECORDING;
  66     static bool last_recording = false;
  67
  68     switch(source)
  69     {
  70         default:
  71             /* playback - no recording */
  72             source = AUDIO_SRC_PLAYBACK;
  73
  74         case AUDIO_SRC_PLAYBACK:
  75             if (source != last_source)
  76             {
  77                 audiohw_set_recsrc(source,false);
  78                 coldfire_set_dataincontrol(0);
  79             }
  80             break;
  81
  82         case AUDIO_SRC_MIC:
  83 #if (INPUT_SRC_CAPS & SRC_CAP_LINEIN)
  84         case AUDIO_SRC_LINEIN:
  85 #endif
  86         /* recording only */
  87             if (source != last_source)
  88             {
  89                 audiohw_set_recsrc(source,true);
  90                 /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
  91                 coldfire_set_dataincontrol((3 << 14) | (4 << 3));
  92             }
  93             break;
  94
  95         case AUDIO_SRC_FMRADIO:
  96             if (source == last_source && recording == last_recording)
  97                 break;
  98
  99             last_recording = recording;
 100
 101             audiohw_set_recsrc(source,recording);
 102             /* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
 103             coldfire_set_dataincontrol(recording ?
 104                                        ((3 << 14) | (4 << 3)) : 0);
 105             break;
 106     }
 107
 108     last_source = source;
 109 }