sound/oss/ics2101.c

   1 /*
   2  * sound/ics2101.c
   3  *
   4  * Driver for the ICS2101 mixer of GUS v3.7.
   5  *
   6  *
   7  * Copyright (C) by Hannu Savolainen 1993-1997
   8  *
   9  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
  10  * Version 2 (June 1991). See the "COPYING" file distributed with this software
  11  * for more info.
  12  *
  13  *
  14  * Thomas Sailer   : ioctl code reworked (vmalloc/vfree removed)
  15  * Bartlomiej Zolnierkiewicz : added __init to ics2101_mixer_init()
  16  */
  17 #include <linux/init.h>
  18 #include <linux/spinlock.h>
  19 #include "sound_config.h"
  20
  21 #include <linux/ultrasound.h>
  22
  23 #include "gus.h"
  24 #include "gus_hw.h"
  25
  26 #define MIX_DEVS        (SOUND_MASK_MIC|SOUND_MASK_LINE| \
  27                          SOUND_MASK_SYNTH| \
  28                          SOUND_MASK_CD | SOUND_MASK_VOLUME)
  29
  30 extern int     *gus_osp;
  31 extern int      gus_base;
  32 extern spinlock_t gus_lock;
  33 static int      volumes[ICS_MIXDEVS];
  34 static int      left_fix[ICS_MIXDEVS] =
  35 {1, 1, 1, 2, 1, 2};
  36 static int      right_fix[ICS_MIXDEVS] =
  37 {2, 2, 2, 1, 2, 1};
  38
  39 static int scale_vol(int vol)
  40 {
  41         /*
  42          *  Experimental volume scaling by Risto Kankkunen.
  43          *  This should give smoother volume response than just
  44          *  a plain multiplication.
  45          */
  46
  47         int e;
  48
  49         if (vol < 0)
  50                 vol = 0;
  51         if (vol > 100)
  52                 vol = 100;
  53         vol = (31 * vol + 50) / 100;
  54         e = 0;
  55         if (vol)
  56         {
  57                 while (vol < 16)
  58                 {
  59                         vol <<= 1;
  60                         e--;
  61                 }
  62                 vol -= 16;
  63                 e += 7;
  64         }
  65         return ((e << 4) + vol);
  66 }
  67
  68 static void write_mix(int dev, int chn, int vol)
  69 {
  70         int *selector;
  71         unsigned long flags;
  72         int ctrl_addr = dev << 3;
  73         int attn_addr = dev << 3;
  74
  75         vol = scale_vol(vol);
  76
  77         if (chn == CHN_LEFT)
  78         {
  79                 selector = left_fix;
  80                 ctrl_addr |= 0x00;
  81                 attn_addr |= 0x02;
  82         }
  83         else
  84         {
  85                 selector = right_fix;
  86                 ctrl_addr |= 0x01;
  87                 attn_addr |= 0x03;
  88         }
  89
  90         spin_lock_irqsave(&gus_lock, flags);
  91         outb((ctrl_addr), u_MixSelect);
  92         outb((selector[dev]), u_MixData);
  93         outb((attn_addr), u_MixSelect);
  94         outb(((unsigned char) vol), u_MixData);
  95         spin_unlock_irqrestore(&gus_lock,flags);
  96 }
  97
  98 static int set_volumes(int dev, int vol)
  99 {
 100         int left = vol & 0x00ff;
 101         int right = (vol >> 8) & 0x00ff;
 102
 103         if (left < 0)
 104                 left = 0;
 105         if (left > 100)
 106                 left = 100;
 107         if (right < 0)
 108                 right = 0;
 109         if (right > 100)
 110                 right = 100;
 111
 112         write_mix(dev, CHN_LEFT, left);
 113         write_mix(dev, CHN_RIGHT, right);
 114
 115         vol = left + (right << 8);
 116         volumes[dev] = vol;
 117         return vol;
 118 }
 119
 120 static int ics2101_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
 121 {
 122         int val;
 123
 124         if (((cmd >> 8) & 0xff) == 'M') {
 125                 if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
 126
 127                         if (get_user(val, (int __user *)arg))
 128                                 return -EFAULT;
 129                         switch (cmd & 0xff) {
 130                         case SOUND_MIXER_RECSRC:
 131                                 return gus_default_mixer_ioctl(dev, cmd, arg);
 132
 133                         case SOUND_MIXER_MIC:
 134                                 val = set_volumes(DEV_MIC, val);
 135                                 break;
 136
 137                         case SOUND_MIXER_CD:
 138                                 val = set_volumes(DEV_CD, val);
 139                                 break;
 140
 141                         case SOUND_MIXER_LINE:
 142                                 val = set_volumes(DEV_LINE, val);
 143                                 break;
 144
 145                         case SOUND_MIXER_SYNTH:
 146                                 val = set_volumes(DEV_GF1, val);
 147                                 break;
 148
 149                         case SOUND_MIXER_VOLUME:
 150                                 val = set_volumes(DEV_VOL, val);
 151                                 break;
 152
 153                         default:
 154                                 return -EINVAL;
 155                         }
 156                         return put_user(val, (int __user *)arg);
 157                 } else {
 158                         switch (cmd & 0xff) {
 159                                 /*
 160                                  * Return parameters
 161                                  */
 162                         case SOUND_MIXER_RECSRC:
 163                                 return gus_default_mixer_ioctl(dev, cmd, arg);
 164
 165                         case SOUND_MIXER_DEVMASK:
 166                                 val = MIX_DEVS;
 167                                 break;
 168
 169                         case SOUND_MIXER_STEREODEVS:
 170                                 val = SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_SYNTH | SOUND_MASK_VOLUME | SOUND_MASK_MIC;
 171                                 break;
 172
 173                         case SOUND_MIXER_RECMASK:
 174                                 val = SOUND_MASK_MIC | SOUND_MASK_LINE;
 175                                 break;
 176
 177                         case SOUND_MIXER_CAPS:
 178                                 val = 0;
 179                                 break;
 180
 181                         case SOUND_MIXER_MIC:
 182                                 val = volumes[DEV_MIC];
 183                                 break;
 184
 185                         case SOUND_MIXER_LINE:
 186                                 val = volumes[DEV_LINE];
 187                                 break;
 188
 189                         case SOUND_MIXER_CD:
 190                                 val = volumes[DEV_CD];
 191                                 break;
 192
 193                         case SOUND_MIXER_VOLUME:
 194                                 val = volumes[DEV_VOL];
 195                                 break;
 196
 197                         case SOUND_MIXER_SYNTH:
 198                                 val = volumes[DEV_GF1];
 199                                 break;
 200
 201                         default:
 202                                 return -EINVAL;
 203                         }
 204                         return put_user(val, (int __user *)arg);
 205                 }
 206         }
 207         return -EINVAL;
 208 }
 209
 210 static struct mixer_operations ics2101_mixer_operations =
 211 {
 212         .owner  = THIS_MODULE,
 213         .id     = "ICS2101",
 214         .name   = "ICS2101 Multimedia Mixer",
 215         .ioctl  = ics2101_mixer_ioctl
 216 };
 217
 218 int __init ics2101_mixer_init(void)
 219 {
 220         int i;
 221         int n;
 222
 223         if ((n = sound_alloc_mixerdev()) != -1)
 224         {
 225                 mixer_devs[n] = &ics2101_mixer_operations;
 226
 227                 /*
 228                  * Some GUS v3.7 cards had some channels flipped. Disable
 229                  * the flipping feature if the model id is other than 5.
 230                  */
 231
 232                 if (inb(u_MixSelect) != 5)
 233                 {
 234                         for (i = 0; i < ICS_MIXDEVS; i++)
 235                                 left_fix[i] = 1;
 236                         for (i = 0; i < ICS_MIXDEVS; i++)
 237                                 right_fix[i] = 2;
 238                 }
 239                 set_volumes(DEV_GF1, 0x5a5a);
 240                 set_volumes(DEV_CD, 0x5a5a);
 241                 set_volumes(DEV_MIC, 0x0000);
 242                 set_volumes(DEV_LINE, 0x5a5a);
 243                 set_volumes(DEV_VOL, 0x5a5a);
 244                 set_volumes(DEV_UNUSED, 0x0000);
 245         }
 246         return n;
 247 }