drivers/sound/sb_mixer.c

   1
   2 /*
   3  * sound/sb_mixer.c
   4  *
   5  * The low level mixer driver for the Sound Blaster compatible cards.
   6  */
   7 /*
   8  * Copyright (C) by Hannu Savolainen 1993-1997
   9  *
  10  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
  11  * Version 2 (June 1991). See the "COPYING" file distributed with this software
  12  * for more info.
  13  *
  14  *
  15  * Thomas Sailer   : ioctl code reworked (vmalloc/vfree removed)
  16  */
  17
  18 #include <linux/config.h>
  19 #include "sound_config.h"
  20
  21 #ifdef CONFIG_SBDSP
  22 #define __SB_MIXER_C__
  23
  24 #include "sb.h"
  25 #include "sb_mixer.h"
  26
  27 static int      sbmixnum = 1;
  28
  29 static void     sb_mixer_reset(sb_devc * devc);
  30
  31 void sb_mixer_set_stereo(sb_devc * devc, int mode)
  32 {
  33         sb_setmixer(devc, OUT_FILTER, ((sb_getmixer(devc, OUT_FILTER) & ~STEREO_DAC)
  34                                        | (mode ? STEREO_DAC : MONO_DAC)));
  35 }
  36
  37 static int detect_mixer(sb_devc * devc)
  38 {
  39         /* Just trust the mixer is there */
  40         return 1;
  41 }
  42
  43 static void change_bits(sb_devc * devc, unsigned char *regval, int dev, int chn, int newval)
  44 {
  45         unsigned char mask;
  46         int shift;
  47
  48         mask = (1 << (*devc->iomap)[dev][chn].nbits) - 1;
  49         newval = (int) ((newval * mask) + 50) / 100;    /* Scale */
  50
  51         shift = (*devc->iomap)[dev][chn].bitoffs - (*devc->iomap)[dev][LEFT_CHN].nbits + 1;
  52
  53         *regval &= ~(mask << shift);    /* Mask out previous value */
  54         *regval |= (newval & mask) << shift;    /* Set the new value */
  55 }
  56
  57 static int sb_mixer_get(sb_devc * devc, int dev)
  58 {
  59         if (!((1 << dev) & devc->supported_devices))
  60                 return -EINVAL;
  61         return devc->levels[dev];
  62 }
  63
  64 void smw_mixer_init(sb_devc * devc)
  65 {
  66         int i;
  67
  68         sb_setmixer(devc, 0x00, 0x18);  /* Mute unused (Telephone) line */
  69         sb_setmixer(devc, 0x10, 0x38);  /* Config register 2 */
  70
  71         devc->supported_devices = 0;
  72         for (i = 0; i < sizeof(smw_mix_regs); i++)
  73                 if (smw_mix_regs[i] != 0)
  74                         devc->supported_devices |= (1 << i);
  75
  76         devc->supported_rec_devices = devc->supported_devices &
  77                 ~(SOUND_MASK_BASS | SOUND_MASK_TREBLE | SOUND_MASK_PCM | SOUND_MASK_VOLUME);
  78         sb_mixer_reset(devc);
  79 }
  80
  81 static int smw_mixer_set(sb_devc * devc, int dev, int value)
  82 {
  83         int left = value & 0x000000ff;
  84         int right = (value & 0x0000ff00) >> 8;
  85         int reg, val;
  86
  87         if (left > 100)
  88                 left = 100;
  89         if (right > 100)
  90                 right = 100;
  91
  92         if (dev > 31)
  93                 return -EINVAL;
  94
  95         if (!(devc->supported_devices & (1 << dev)))    /* Not supported */
  96                 return -EINVAL;
  97
  98         switch (dev)
  99         {
 100                 case SOUND_MIXER_VOLUME:
 101                         sb_setmixer(devc, 0x0b, 96 - (96 * left / 100));        /* 96=mute, 0=max */
 102                         sb_setmixer(devc, 0x0c, 96 - (96 * right / 100));
 103                         break;
 104
 105                 case SOUND_MIXER_BASS:
 106                 case SOUND_MIXER_TREBLE:
 107                         devc->levels[dev] = left | (right << 8);
 108                         /* Set left bass and treble values */
 109                         val = ((devc->levels[SOUND_MIXER_TREBLE] & 0xff) * 16 / (unsigned) 100) << 4;
 110                         val |= ((devc->levels[SOUND_MIXER_BASS] & 0xff) * 16 / (unsigned) 100) & 0x0f;
 111                         sb_setmixer(devc, 0x0d, val);
 112
 113                         /* Set right bass and treble values */
 114                         val = (((devc->levels[SOUND_MIXER_TREBLE] >> 8) & 0xff) * 16 / (unsigned) 100) << 4;
 115                         val |= (((devc->levels[SOUND_MIXER_BASS] >> 8) & 0xff) * 16 / (unsigned) 100) & 0x0f;
 116                         sb_setmixer(devc, 0x0e, val);
 117
 118                         break;
 119
 120                 default:
 121                         reg = smw_mix_regs[dev];
 122                         if (reg == 0)
 123                                 return -EINVAL;
 124                         sb_setmixer(devc, reg, (24 - (24 * left / 100)) | 0x20);        /* 24=mute, 0=max */
 125                         sb_setmixer(devc, reg + 1, (24 - (24 * right / 100)) | 0x40);
 126         }
 127
 128         devc->levels[dev] = left | (right << 8);
 129         return left | (right << 8);
 130 }
 131
 132 static int sb_mixer_set(sb_devc * devc, int dev, int value)
 133 {
 134         int left = value & 0x000000ff;
 135         int right = (value & 0x0000ff00) >> 8;
 136
 137         int regoffs;
 138         unsigned char   val;
 139
 140         if (devc->model == MDL_SMW)
 141                 return smw_mixer_set(devc, dev, value);
 142
 143         if (left > 100)
 144                 left = 100;
 145         if (right > 100)
 146                 right = 100;
 147
 148         if (dev > 31)
 149                 return -EINVAL;
 150
 151         if (!(devc->supported_devices & (1 << dev)))    /*
 152                                                          * Not supported
 153                                                          */
 154                 return -EINVAL;
 155
 156         regoffs = (*devc->iomap)[dev][LEFT_CHN].regno;
 157
 158         if (regoffs == 0)
 159                 return -EINVAL;
 160
 161         val = sb_getmixer(devc, regoffs);
 162         change_bits(devc, &val, dev, LEFT_CHN, left);
 163
 164         devc->levels[dev] = left | (left << 8);
 165
 166         if ((*devc->iomap)[dev][RIGHT_CHN].regno != regoffs)    /*
 167                                                                  * Change register
 168                                                                  */
 169         {
 170                 sb_setmixer(devc, regoffs, val);        /*
 171                                                          * Save the old one
 172                                                          */
 173                 regoffs = (*devc->iomap)[dev][RIGHT_CHN].regno;
 174
 175                 if (regoffs == 0)
 176                         return left | (left << 8);      /*
 177                                                          * Just left channel present
 178                                                          */
 179
 180                 val = sb_getmixer(devc, regoffs);       /*
 181                                                          * Read the new one
 182                                                          */
 183         }
 184         change_bits(devc, &val, dev, RIGHT_CHN, right);
 185
 186         sb_setmixer(devc, regoffs, val);
 187
 188         devc->levels[dev] = left | (right << 8);
 189         return left | (right << 8);
 190 }
 191
 192 static void set_recsrc(sb_devc * devc, int src)
 193 {
 194         sb_setmixer(devc, RECORD_SRC, (sb_getmixer(devc, RECORD_SRC) & ~7) | (src & 0x7));
 195 }
 196
 197 static int set_recmask(sb_devc * devc, int mask)
 198 {
 199         int devmask, i;
 200         unsigned char  regimageL, regimageR;
 201
 202         devmask = mask & devc->supported_rec_devices;
 203
 204         switch (devc->model)
 205         {
 206                 case MDL_SBPRO:
 207                 case MDL_ESS:
 208                 case MDL_JAZZ:
 209                 case MDL_SMW:
 210
 211                         if (devmask != SOUND_MASK_MIC &&
 212                                 devmask != SOUND_MASK_LINE &&
 213                                 devmask != SOUND_MASK_CD)
 214                         {
 215                                 /*
 216                                  * More than one device selected. Drop the
 217                                  * previous selection
 218                                  */
 219                                 devmask &= ~devc->recmask;
 220                         }
 221                         if (devmask != SOUND_MASK_MIC &&
 222                                 devmask != SOUND_MASK_LINE &&
 223                                 devmask != SOUND_MASK_CD)
 224                         {
 225                                 /*
 226                                  * More than one device selected. Default to
 227                                  * mic
 228                                  */
 229                                 devmask = SOUND_MASK_MIC;
 230                         }
 231                         if (devmask ^ devc->recmask)    /*
 232                                                          *      Input source changed
 233                                                          */
 234                         {
 235                                 switch (devmask)
 236                                 {
 237                                         case SOUND_MASK_MIC:
 238                                                 set_recsrc(devc, SRC__MIC);
 239                                                 break;
 240
 241                                         case SOUND_MASK_LINE:
 242                                                 set_recsrc(devc, SRC__LINE);
 243                                                 break;
 244
 245                                         case SOUND_MASK_CD:
 246                                                 set_recsrc(devc, SRC__CD);
 247                                                 break;
 248
 249                                         default:
 250                                                 set_recsrc(devc, SRC__MIC);
 251                                 }
 252                         }
 253                         break;
 254
 255                 case MDL_SB16:
 256                         if (!devmask)
 257                                 devmask = SOUND_MASK_MIC;
 258
 259                         if (devc->submodel == SUBMDL_ALS007)
 260                         {
 261                                 switch (devmask)
 262                                 {
 263                                         case SOUND_MASK_LINE:
 264                                                 sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_LINE);
 265                                                 break;
 266                                         case SOUND_MASK_CD:
 267                                                 sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_CD);
 268                                                 break;
 269                                         case SOUND_MASK_SYNTH:
 270                                                 sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_SYNTH);
 271                                                 break;
 272                                         default:           /* Also takes care of SOUND_MASK_MIC case */
 273                                                 sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_MIC);
 274                                                 break;
 275                                 }
 276                         }
 277                         else
 278                         {
 279                                 regimageL = regimageR = 0;
 280                                 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
 281                                 {
 282                                         if ((1 << i) & devmask)
 283                                         {
 284                                                 regimageL |= sb16_recmasks_L[i];
 285                                                 regimageR |= sb16_recmasks_R[i];
 286                                         }
 287                                         sb_setmixer (devc, SB16_IMASK_L, regimageL);
 288                                         sb_setmixer (devc, SB16_IMASK_R, regimageR);
 289                                 }
 290                         }
 291                         break;
 292         }
 293         devc->recmask = devmask;
 294         return devc->recmask;
 295 }
 296
 297 static int sb_mixer_ioctl(int dev, unsigned int cmd, caddr_t arg)
 298 {
 299         sb_devc *devc = mixer_devs[dev]->devc;
 300         int val, ret;
 301
 302         /*
 303          * Use ioctl(fd, SOUND_MIXER_PRIVATE1, &mode) to turn AGC off (0) or on (1).
 304          */
 305         if (cmd == SOUND_MIXER_PRIVATE1 && devc->model == MDL_SB16)
 306         {
 307                 if (get_user(val, (int *)arg))
 308                         return -EFAULT;
 309                 sb_setmixer(devc, 0x43, (~val) & 0x01);
 310                 return 0;
 311         }
 312         if (((cmd >> 8) & 0xff) == 'M')
 313         {
 314                 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
 315                 {
 316                         if (get_user(val, (int *)arg))
 317                                 return -EFAULT;
 318                         switch (cmd & 0xff)
 319                         {
 320                                 case SOUND_MIXER_RECSRC:
 321                                         ret = set_recmask(devc, val);
 322                                         break;
 323
 324                                 default:
 325                                         ret = sb_mixer_set(devc, cmd & 0xff, val);
 326                         }
 327                 }
 328                 else switch (cmd & 0xff)
 329                 {
 330                         case SOUND_MIXER_RECSRC:
 331                                 ret = devc->recmask;
 332                                 break;
 333
 334                         case SOUND_MIXER_DEVMASK:
 335                                 ret = devc->supported_devices;
 336                                 break;
 337
 338                         case SOUND_MIXER_STEREODEVS:
 339                                 ret = devc->supported_devices;
 340                                 /* The ESS seems to have stereo mic controls */
 341                                 if (devc->model == MDL_ESS)
 342                                         ret &= ~(SOUND_MASK_SPEAKER|SOUND_MASK_IMIX);
 343                                 else if (devc->model != MDL_JAZZ && devc->model != MDL_SMW)
 344                                         ret &= ~(SOUND_MASK_MIC | SOUND_MASK_SPEAKER | SOUND_MASK_IMIX);
 345                                 break;
 346
 347                         case SOUND_MIXER_RECMASK:
 348                                 ret = devc->supported_rec_devices;
 349                                 break;
 350
 351                         case SOUND_MIXER_CAPS:
 352                                 ret = devc->mixer_caps;
 353                                 break;
 354
 355                         default:
 356                                 ret = sb_mixer_get(devc, cmd & 0xff);
 357                                 break;
 358                 }
 359                 return put_user(ret, (int *)arg);
 360         } else
 361                 return -EINVAL;
 362 }
 363
 364 static struct mixer_operations sb_mixer_operations =
 365 {
 366         "SB",
 367         "Sound Blaster",
 368         sb_mixer_ioctl
 369 };
 370
 371 static struct mixer_operations als007_mixer_operations =
 372 {
 373         "ALS007",
 374         "Avance ALS-007",
 375         sb_mixer_ioctl
 376 };
 377
 378 static void sb_mixer_reset(sb_devc * devc)
 379 {
 380         char name[32];
 381         int i;
 382         extern int sm_games;
 383
 384         sprintf(name, "SB_%d", devc->sbmixnum);
 385
 386         if (sm_games)
 387                 devc->levels = load_mixer_volumes(name, smg_default_levels, 1);
 388         else
 389                 devc->levels = load_mixer_volumes(name, sb_default_levels, 1);
 390
 391         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
 392                 sb_mixer_set(devc, i, devc->levels[i]);
 393         set_recmask(devc, SOUND_MASK_MIC);
 394 }
 395
 396 int sb_mixer_init(sb_devc * devc)
 397 {
 398         int mixer_type = 0;
 399         int m;
 400
 401         devc->sbmixnum = sbmixnum++;
 402         devc->levels = NULL;
 403
 404         sb_setmixer(devc, 0x00, 0);     /* Reset mixer */
 405
 406         if (!(mixer_type = detect_mixer(devc)))
 407                 return 0;       /* No mixer. Why? */
 408
 409         switch (devc->model)
 410         {
 411                 case MDL_SBPRO:
 412                 case MDL_AZTECH:
 413                 case MDL_JAZZ:
 414                         devc->mixer_caps = SOUND_CAP_EXCL_INPUT;
 415                         devc->supported_devices = SBPRO_MIXER_DEVICES;
 416                         devc->supported_rec_devices = SBPRO_RECORDING_DEVICES;
 417                         devc->iomap = &sbpro_mix;
 418                         break;
 419
 420                 case MDL_ESS:
 421                         devc->mixer_caps = SOUND_CAP_EXCL_INPUT;
 422                         devc->supported_devices = ES688_MIXER_DEVICES;
 423                         devc->supported_rec_devices = ES688_RECORDING_DEVICES;
 424                         devc->iomap = &es688_mix;
 425                         break;
 426
 427                 case MDL_SMW:
 428                         devc->mixer_caps = SOUND_CAP_EXCL_INPUT;
 429                         devc->supported_devices = 0;
 430                         devc->supported_rec_devices = 0;
 431                         devc->iomap = &sbpro_mix;
 432                         smw_mixer_init(devc);
 433                         break;
 434
 435                 case MDL_SB16:
 436                         devc->mixer_caps = 0;
 437                         devc->supported_rec_devices = SB16_RECORDING_DEVICES;
 438                         if (devc->submodel != SUBMDL_ALS007)
 439                         {
 440                                 devc->supported_devices = SB16_MIXER_DEVICES;
 441                                 devc->iomap = &sb16_mix;
 442                         }
 443                         else
 444                         {
 445                                 devc->supported_devices = ALS007_MIXER_DEVICES;
 446                                 devc->iomap = &als007_mix;
 447                         }
 448                         break;
 449
 450                 default:
 451                         printk(KERN_WARNING "sb_mixer: Unsupported mixer type %d\n", devc->model);
 452                         return 0;
 453         }
 454
 455         m = sound_alloc_mixerdev();
 456         if (m == -1)
 457                 return 0;
 458
 459         mixer_devs[m] = (struct mixer_operations *)kmalloc(sizeof(struct mixer_operations), GFP_KERNEL);
 460         if (mixer_devs[m] == NULL)
 461         {
 462                 printk(KERN_ERR "sb_mixer: Can't allocate memory\n");
 463                 sound_unload_mixerdev(m);
 464                 return 0;
 465         }
 466
 467         if (devc->submodel != SUBMDL_ALS007)
 468                 memcpy ((char *) mixer_devs[m], (char *) &sb_mixer_operations, sizeof (struct mixer_operations));
 469         else
 470                 memcpy ((char *) mixer_devs[m], (char *) &als007_mixer_operations, sizeof (struct mixer_operations));
 471
 472         mixer_devs[m]->devc = devc;
 473         devc->my_mixerdev = m;
 474         sb_mixer_reset(devc);
 475         return 1;
 476 }
 477
 478 #endif