drivers/sound/vidc_mixer.c

   1 /*
   2  * drivers/sound/vidc_mixer.c
   3  *
   4  * Mixer routines for VIDC
   5  *
   6  * Copyright (C) 1997 Russell King <rmk@arm.uk.linux.org>
   7  */
   8
   9 #include "sound_config.h"
  10 #include "vidc.h"
  11
  12 int vidc_volume;
  13
  14 static int vidc_get_volume(void)
  15 {
  16         return vidc_volume;
  17 }
  18
  19 static int vidc_set_volume(int newvol)
  20 {
  21         vidc_volume = newvol;
  22 /*  printk ("vidc_set_volume: %X\n", newvol); */
  23         return newvol;
  24 }
  25
  26 static int vidc_default_mixer_ioctl(int dev, unsigned int cmd, caddr_t arg)
  27 {
  28         int ret;
  29
  30         switch (cmd)
  31         {
  32                 case SOUND_MIXER_READ_VOLUME:
  33                         ret = vidc_get_volume();
  34                         break;
  35
  36                 case SOUND_MIXER_WRITE_VOLUME:
  37                         if (get_user(ret, (int *) arg))
  38                                 return -EINVAL;
  39                         ret = vidc_set_volume(ret);
  40                         break;
  41
  42                 case SOUND_MIXER_READ_BASS:
  43                 case SOUND_MIXER_WRITE_BASS:
  44                 case SOUND_MIXER_READ_TREBLE:
  45                 case SOUND_MIXER_WRITE_TREBLE:
  46                         ret = 50;
  47                         break;
  48
  49                 case SOUND_MIXER_READ_SYNTH:
  50 //                      ret = vidc_synth_get_volume();
  51                         ret = 0;
  52                         break;
  53
  54                 case SOUND_MIXER_WRITE_SYNTH:
  55                         if (get_user(ret, (int *) arg))
  56                                 return -EINVAL;
  57 //                      ret = vidc_synth_set_volume(ret);
  58                         ret = 0;
  59                         break;
  60
  61                 case SOUND_MIXER_READ_PCM:
  62                         ret = vidc_audio_get_volume();
  63                         break;
  64
  65                 case SOUND_MIXER_WRITE_PCM:
  66                         if (get_user(ret, (int *) arg))
  67                                 return -EINVAL;
  68                         ret = vidc_audio_set_volume(ret);
  69                         break;
  70
  71                 case SOUND_MIXER_READ_SPEAKER:
  72                         ret = 100;
  73                         break;
  74
  75                 case SOUND_MIXER_WRITE_SPEAKER:
  76                         ret = 100;
  77                         break;
  78
  79                 case SOUND_MIXER_READ_LINE:
  80                 case SOUND_MIXER_WRITE_LINE:
  81                 case SOUND_MIXER_READ_MIC:
  82                 case SOUND_MIXER_WRITE_MIC:
  83                         ret = 0;
  84                         break;
  85
  86                 case SOUND_MIXER_READ_CD:
  87                 case SOUND_MIXER_WRITE_CD:
  88                         ret = 100 | (100 << 8);
  89                         break;
  90
  91                 case SOUND_MIXER_READ_IMIX:
  92                 case SOUND_MIXER_WRITE_IMIX:
  93                 case SOUND_MIXER_READ_ALTPCM:
  94                 case SOUND_MIXER_WRITE_ALTPCM:
  95                 case SOUND_MIXER_READ_LINE1:
  96                 case SOUND_MIXER_WRITE_LINE1:
  97                 case SOUND_MIXER_READ_LINE2:
  98                 case SOUND_MIXER_WRITE_LINE2:
  99                 case SOUND_MIXER_READ_LINE3:
 100                 case SOUND_MIXER_WRITE_LINE3:
 101                         ret = 0;
 102                         break;
 103
 104                 case SOUND_MIXER_READ_RECSRC:
 105                         ret = 0;
 106                         break;
 107
 108                 case SOUND_MIXER_WRITE_RECSRC:
 109                         return -EINVAL;
 110                         break;
 111
 112                 case SOUND_MIXER_READ_DEVMASK:
 113                         ret = SOUND_MASK_VOLUME | SOUND_MASK_PCM | SOUND_MASK_SYNTH;
 114                         break;
 115
 116                 case SOUND_MIXER_READ_RECMASK:
 117                         ret = 0;
 118                         break;
 119
 120                 case SOUND_MIXER_READ_STEREODEVS:
 121                         ret = SOUND_MASK_VOLUME | SOUND_MASK_PCM | SOUND_MASK_SYNTH;
 122                         break;
 123
 124                 case SOUND_MIXER_READ_CAPS:
 125                         ret = 0;
 126                         break;
 127
 128                 case SOUND_MIXER_READ_MUTE:
 129                         return -EINVAL;
 130                         break;
 131
 132                 default:
 133                         return -EINVAL;
 134                         break;
 135         }
 136         return put_user(ret, (int *) arg);
 137 }
 138
 139 static struct mixer_operations vidc_mixer_operations = {
 140         "VIDC",
 141         "VIDCsound",
 142         vidc_default_mixer_ioctl        /* ioctl                */
 143 };
 144
 145 void vidc_mixer_init(struct address_info *hw_config)
 146 {
 147         int vidc_mixer = sound_alloc_mixerdev();
 148         vidc_volume = 100 | (100 << 8);
 149         if (num_mixers < MAX_MIXER_DEV)
 150                 mixer_devs[vidc_mixer] = &vidc_mixer_operations;
 151 }