firmware/drivers/audio/tsc2100.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Driver for TSC2100 audio codec
  11  *
  12  * Copyright (c) 2008 Jonathan Gordon
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  20  * KIND, either express or implied.
  21  *
  22  ****************************************************************************/
  23 #include "cpu.h"
  24 #include "debug.h"
  25 #include "system.h"
  26 #include "audio.h"
  27
  28 #include "audiohw.h"
  29 #include "tsc2100.h"
  30
  31 const struct sound_settings_info audiohw_settings[] = {
  32     [SOUND_VOLUME]        = {"dB",   0,   1, -63,   0, -25},
  33 #if 0
  34     /* HAVE_SW_TONE_CONTROLS */
  35     [SOUND_BASS]          = {"dB",   0,   1, -24,  24,   0},
  36     [SOUND_TREBLE]        = {"dB",   0,   1, -24,  24,   0},
  37     [SOUND_BALANCE]       = {"%",    0,   1,-100, 100,   0},
  38     [SOUND_CHANNELS]      = {"",     0,   1,   0,   5,   0},
  39     [SOUND_STEREO_WIDTH]  = {"%",    0,   5,   0, 250, 100},
  40 #ifdef HAVE_RECORDING
  41     [SOUND_MIC_GAIN]      = {"dB",   1,   1,   0,  39,  23},
  42     [SOUND_LEFT_GAIN]     = {"dB",   1,   1,   0,  31,  23},
  43     [SOUND_RIGHT_GAIN]    = {"dB",   1,   1,   0,  31,  23},
  44 #endif
  45 #endif
  46 };
  47 static bool is_muted = false;
  48 /* convert tenth of dB volume to master volume register value */
  49 int tenthdb2master(int db)
  50 {
  51     /* 0 to -63.0dB in 1dB steps, tsc2100 can goto -63.5 in 0.5dB steps */
  52     if (db < VOLUME_MIN) {
  53         return 0x0;
  54     } else if (db >= VOLUME_MAX) {
  55         return 0x1f;
  56     } else {
  57         return((db-VOLUME_MIN)/10); /* VOLUME_MIN is negative */
  58     }
  59 }
  60
  61 int sound_val2phys(int setting, int value)
  62 {
  63     int result;
  64
  65     switch(setting)
  66     {
  67 #if 0
  68     case SOUND_LEFT_GAIN:
  69     case SOUND_RIGHT_GAIN:
  70     case SOUND_MIC_GAIN:
  71         result = (value - 23) * 15;
  72         break;
  73 #endif
  74     default:
  75         result = value;
  76         break;
  77     }
  78
  79     return result;
  80 }
  81
  82 void audiohw_init(void)
  83 {
  84     short val = tsc2100_readreg(TSAC4_PAGE, TSAC4_ADDRESS);
  85     /* disable DAC PGA soft-stepping */
  86     val |= TSAC4_DASTDP;
  87
  88     tsc2100_writereg(TSAC4_PAGE, TSAC4_ADDRESS, val);
  89 }
  90
  91 void audiohw_postinit(void)
  92 {
  93     audiohw_mute(0);
  94 }
  95
  96 void audiohw_set_master_vol(int vol_l, int vol_r)
  97 {
  98    short vol = (vol_l<<14)|(vol_r);
  99    if (is_muted)
 100        vol |= (1<<15)|(1<<7);
 101    tsc2100_writereg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS, vol);
 102 }
 103
 104 void audiohw_set_lineout_vol(int vol_l, int vol_r)
 105 {
 106     audiohw_set_master_vol(vol_l, vol_r);
 107 }
 108
 109 void audiohw_mute(bool mute)
 110 {
 111     short vol = tsc2100_readreg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS);
 112     /* left  mute bit == 1<<15
 113        right mute bit == 1<<7
 114      */
 115     if (mute)
 116     {
 117         vol |= (1<<15)|(1<<7);
 118     } else
 119     {
 120         vol &= ~((1<<15)|(1<<7));
 121     }
 122     is_muted = mute;
 123     tsc2100_writereg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS, vol);
 124 }
 125
 126 void audiohw_close(void)
 127 {
 128     /* mute headphones */
 129     audiohw_mute(true);
 130
 131 }
 132
 133 void audiohw_set_frequency(int fsel)
 134 {
 135     (void)fsel;
 136 }