sound/core/oss/mixer_oss.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  OSS emulation layer for the mixer interface
   4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   5  */
   6
   7 #include <linux/init.h>
   8 #include <linux/slab.h>
   9 #include <linux/time.h>
  10 #include <linux/string.h>
  11 #include <linux/module.h>
  12 #include <linux/compat.h>
  13 #include <sound/core.h>
  14 #include <sound/minors.h>
  15 #include <sound/control.h>
  16 #include <sound/info.h>
  17 #include <sound/mixer_oss.h>
  18 #include <linux/soundcard.h>
  19
  20 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  21
  22 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  23 MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
  24 MODULE_LICENSE("GPL");
  25 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
  26
  27 static int snd_mixer_oss_open(struct inode *inode, struct file *file)
  28 {
  29         struct snd_card *card;
  30         struct snd_mixer_oss_file *fmixer;
  31         int err;
  32
  33         err = nonseekable_open(inode, file);
  34         if (err < 0)
  35                 return err;
  36
  37         card = snd_lookup_oss_minor_data(iminor(inode),
  38                                          SNDRV_OSS_DEVICE_TYPE_MIXER);
  39         if (card == NULL)
  40                 return -ENODEV;
  41         if (card->mixer_oss == NULL) {
  42                 snd_card_unref(card);
  43                 return -ENODEV;
  44         }
  45         err = snd_card_file_add(card, file);
  46         if (err < 0) {
  47                 snd_card_unref(card);
  48                 return err;
  49         }
  50         fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL);
  51         if (fmixer == NULL) {
  52                 snd_card_file_remove(card, file);
  53                 snd_card_unref(card);
  54                 return -ENOMEM;
  55         }
  56         fmixer->card = card;
  57         fmixer->mixer = card->mixer_oss;
  58         file->private_data = fmixer;
  59         if (!try_module_get(card->module)) {
  60                 kfree(fmixer);
  61                 snd_card_file_remove(card, file);
  62                 snd_card_unref(card);
  63                 return -EFAULT;
  64         }
  65         snd_card_unref(card);
  66         return 0;
  67 }
  68
  69 static int snd_mixer_oss_release(struct inode *inode, struct file *file)
  70 {
  71         struct snd_mixer_oss_file *fmixer;
  72
  73         if (file->private_data) {
  74                 fmixer = file->private_data;
  75                 module_put(fmixer->card->module);
  76                 snd_card_file_remove(fmixer->card, file);
  77                 kfree(fmixer);
  78         }
  79         return 0;
  80 }
  81
  82 static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer,
  83                               mixer_info __user *_info)
  84 {
  85         struct snd_card *card = fmixer->card;
  86         struct snd_mixer_oss *mixer = fmixer->mixer;
  87         struct mixer_info info;
  88
  89         memset(&info, 0, sizeof(info));
  90         strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
  91         strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
  92         info.modify_counter = card->mixer_oss_change_count;
  93         if (copy_to_user(_info, &info, sizeof(info)))
  94                 return -EFAULT;
  95         return 0;
  96 }
  97
  98 static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer,
  99                                        _old_mixer_info __user *_info)
 100 {
 101         struct snd_card *card = fmixer->card;
 102         struct snd_mixer_oss *mixer = fmixer->mixer;
 103         _old_mixer_info info;
 104
 105         memset(&info, 0, sizeof(info));
 106         strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
 107         strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
 108         if (copy_to_user(_info, &info, sizeof(info)))
 109                 return -EFAULT;
 110         return 0;
 111 }
 112
 113 static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer)
 114 {
 115         struct snd_mixer_oss *mixer = fmixer->mixer;
 116         int result = 0;
 117
 118         if (mixer == NULL)
 119                 return -EIO;
 120         if (mixer->get_recsrc && mixer->put_recsrc)
 121                 result |= SOUND_CAP_EXCL_INPUT;
 122         return result;
 123 }
 124
 125 static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer)
 126 {
 127         struct snd_mixer_oss *mixer = fmixer->mixer;
 128         struct snd_mixer_oss_slot *pslot;
 129         int result = 0, chn;
 130
 131         if (mixer == NULL)
 132                 return -EIO;
 133         for (chn = 0; chn < 31; chn++) {
 134                 pslot = &mixer->slots[chn];
 135                 if (pslot->put_volume || pslot->put_recsrc)
 136                         result |= 1 << chn;
 137         }
 138         return result;
 139 }
 140
 141 static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
 142 {
 143         struct snd_mixer_oss *mixer = fmixer->mixer;
 144         struct snd_mixer_oss_slot *pslot;
 145         int result = 0, chn;
 146
 147         if (mixer == NULL)
 148                 return -EIO;
 149         for (chn = 0; chn < 31; chn++) {
 150                 pslot = &mixer->slots[chn];
 151                 if (pslot->put_volume && pslot->stereo)
 152                         result |= 1 << chn;
 153         }
 154         return result;
 155 }
 156
 157 static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
 158 {
 159         struct snd_mixer_oss *mixer = fmixer->mixer;
 160         int result = 0;
 161
 162         if (mixer == NULL)
 163                 return -EIO;
 164         if (mixer->put_recsrc && mixer->get_recsrc) {   /* exclusive */
 165                 result = mixer->mask_recsrc;
 166         } else {
 167                 struct snd_mixer_oss_slot *pslot;
 168                 int chn;
 169                 for (chn = 0; chn < 31; chn++) {
 170                         pslot = &mixer->slots[chn];
 171                         if (pslot->put_recsrc)
 172                                 result |= 1 << chn;
 173                 }
 174         }
 175         return result;
 176 }
 177
 178 static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
 179 {
 180         struct snd_mixer_oss *mixer = fmixer->mixer;
 181         int result = 0;
 182
 183         if (mixer == NULL)
 184                 return -EIO;
 185         if (mixer->put_recsrc && mixer->get_recsrc) {   /* exclusive */
 186                 int err;
 187                 unsigned int index;
 188                 err = mixer->get_recsrc(fmixer, &index);
 189                 if (err < 0)
 190                         return err;
 191                 result = 1 << index;
 192         } else {
 193                 struct snd_mixer_oss_slot *pslot;
 194                 int chn;
 195                 for (chn = 0; chn < 31; chn++) {
 196                         pslot = &mixer->slots[chn];
 197                         if (pslot->get_recsrc) {
 198                                 int active = 0;
 199                                 pslot->get_recsrc(fmixer, pslot, &active);
 200                                 if (active)
 201                                         result |= 1 << chn;
 202                         }
 203                 }
 204         }
 205         return mixer->oss_recsrc = result;
 206 }
 207
 208 static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
 209 {
 210         struct snd_mixer_oss *mixer = fmixer->mixer;
 211         struct snd_mixer_oss_slot *pslot;
 212         int chn, active;
 213         unsigned int index;
 214         int result = 0;
 215
 216         if (mixer == NULL)
 217                 return -EIO;
 218         if (mixer->get_recsrc && mixer->put_recsrc) {   /* exclusive input */
 219                 if (recsrc & ~mixer->oss_recsrc)
 220                         recsrc &= ~mixer->oss_recsrc;
 221                 mixer->put_recsrc(fmixer, ffz(~recsrc));
 222                 mixer->get_recsrc(fmixer, &index);
 223                 result = 1 << index;
 224         }
 225         for (chn = 0; chn < 31; chn++) {
 226                 pslot = &mixer->slots[chn];
 227                 if (pslot->put_recsrc) {
 228                         active = (recsrc & (1 << chn)) ? 1 : 0;
 229                         pslot->put_recsrc(fmixer, pslot, active);
 230                 }
 231         }
 232         if (! result) {
 233                 for (chn = 0; chn < 31; chn++) {
 234                         pslot = &mixer->slots[chn];
 235                         if (pslot->get_recsrc) {
 236                                 active = 0;
 237                                 pslot->get_recsrc(fmixer, pslot, &active);
 238                                 if (active)
 239                                         result |= 1 << chn;
 240                         }
 241                 }
 242         }
 243         return result;
 244 }
 245
 246 static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
 247 {
 248         struct snd_mixer_oss *mixer = fmixer->mixer;
 249         struct snd_mixer_oss_slot *pslot;
 250         int result = 0, left, right;
 251
 252         if (mixer == NULL || slot > 30)
 253                 return -EIO;
 254         pslot = &mixer->slots[slot];
 255         left = pslot->volume[0];
 256         right = pslot->volume[1];
 257         if (pslot->get_volume)
 258                 result = pslot->get_volume(fmixer, pslot, &left, &right);
 259         if (!pslot->stereo)
 260                 right = left;
 261         if (snd_BUG_ON(left < 0 || left > 100))
 262                 return -EIO;
 263         if (snd_BUG_ON(right < 0 || right > 100))
 264                 return -EIO;
 265         if (result >= 0) {
 266                 pslot->volume[0] = left;
 267                 pslot->volume[1] = right;
 268                 result = (left & 0xff) | ((right & 0xff) << 8);
 269         }
 270         return result;
 271 }
 272
 273 static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
 274                                     int slot, int volume)
 275 {
 276         struct snd_mixer_oss *mixer = fmixer->mixer;
 277         struct snd_mixer_oss_slot *pslot;
 278         int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
 279
 280         if (mixer == NULL || slot > 30)
 281                 return -EIO;
 282         pslot = &mixer->slots[slot];
 283         if (left > 100)
 284                 left = 100;
 285         if (right > 100)
 286                 right = 100;
 287         if (!pslot->stereo)
 288                 right = left;
 289         if (pslot->put_volume)
 290                 result = pslot->put_volume(fmixer, pslot, left, right);
 291         if (result < 0)
 292                 return result;
 293         pslot->volume[0] = left;
 294         pslot->volume[1] = right;
 295         return (left & 0xff) | ((right & 0xff) << 8);
 296 }
 297
 298 static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
 299 {
 300         void __user *argp = (void __user *)arg;
 301         int __user *p = argp;
 302         int tmp;
 303
 304         if (snd_BUG_ON(!fmixer))
 305                 return -ENXIO;
 306         if (((cmd >> 8) & 0xff) == 'M') {
 307                 switch (cmd) {
 308                 case SOUND_MIXER_INFO:
 309                         return snd_mixer_oss_info(fmixer, argp);
 310                 case SOUND_OLD_MIXER_INFO:
 311                         return snd_mixer_oss_info_obsolete(fmixer, argp);
 312                 case SOUND_MIXER_WRITE_RECSRC:
 313                         if (get_user(tmp, p))
 314                                 return -EFAULT;
 315                         tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
 316                         if (tmp < 0)
 317                                 return tmp;
 318                         return put_user(tmp, p);
 319                 case OSS_GETVERSION:
 320                         return put_user(SNDRV_OSS_VERSION, p);
 321                 case OSS_ALSAEMULVER:
 322                         return put_user(1, p);
 323                 case SOUND_MIXER_READ_DEVMASK:
 324                         tmp = snd_mixer_oss_devmask(fmixer);
 325                         if (tmp < 0)
 326                                 return tmp;
 327                         return put_user(tmp, p);
 328                 case SOUND_MIXER_READ_STEREODEVS:
 329                         tmp = snd_mixer_oss_stereodevs(fmixer);
 330                         if (tmp < 0)
 331                                 return tmp;
 332                         return put_user(tmp, p);
 333                 case SOUND_MIXER_READ_RECMASK:
 334                         tmp = snd_mixer_oss_recmask(fmixer);
 335                         if (tmp < 0)
 336                                 return tmp;
 337                         return put_user(tmp, p);
 338                 case SOUND_MIXER_READ_CAPS:
 339                         tmp = snd_mixer_oss_caps(fmixer);
 340                         if (tmp < 0)
 341                                 return tmp;
 342                         return put_user(tmp, p);
 343                 case SOUND_MIXER_READ_RECSRC:
 344                         tmp = snd_mixer_oss_get_recsrc(fmixer);
 345                         if (tmp < 0)
 346                                 return tmp;
 347                         return put_user(tmp, p);
 348                 }
 349         }
 350         if (cmd & SIOC_IN) {
 351                 if (get_user(tmp, p))
 352                         return -EFAULT;
 353                 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
 354                 if (tmp < 0)
 355                         return tmp;
 356                 return put_user(tmp, p);
 357         } else if (cmd & SIOC_OUT) {
 358                 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
 359                 if (tmp < 0)
 360                         return tmp;
 361                 return put_user(tmp, p);
 362         }
 363         return -ENXIO;
 364 }
 365
 366 static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 367 {
 368         return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
 369 }
 370
 371 int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
 372 {
 373         struct snd_mixer_oss_file fmixer;
 374
 375         if (snd_BUG_ON(!card))
 376                 return -ENXIO;
 377         if (card->mixer_oss == NULL)
 378                 return -ENXIO;
 379         memset(&fmixer, 0, sizeof(fmixer));
 380         fmixer.card = card;
 381         fmixer.mixer = card->mixer_oss;
 382         return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
 383 }
 384 EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
 385
 386 #ifdef CONFIG_COMPAT
 387 /* all compatible */
 388 static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd,
 389                                        unsigned long arg)
 390 {
 391         return snd_mixer_oss_ioctl1(file->private_data, cmd,
 392                                     (unsigned long)compat_ptr(arg));
 393 }
 394 #else
 395 #define snd_mixer_oss_ioctl_compat      NULL
 396 #endif
 397
 398 /*
 399  *  REGISTRATION PART
 400  */
 401
 402 static const struct file_operations snd_mixer_oss_f_ops =
 403 {
 404         .owner =        THIS_MODULE,
 405         .open =         snd_mixer_oss_open,
 406         .release =      snd_mixer_oss_release,
 407         .llseek =       no_llseek,
 408         .unlocked_ioctl =       snd_mixer_oss_ioctl,
 409         .compat_ioctl = snd_mixer_oss_ioctl_compat,
 410 };
 411
 412 /*
 413  *  utilities
 414  */
 415
 416 static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
 417 {
 418         long orange = omax - omin, nrange = nmax - nmin;
 419
 420         if (orange == 0)
 421                 return 0;
 422         return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin;
 423 }
 424
 425 /* convert from alsa native to oss values (0-100) */
 426 static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
 427 {
 428         if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
 429                 return *old;
 430         return snd_mixer_oss_conv(val, min, max, 0, 100);
 431 }
 432
 433 /* convert from oss to alsa native values */
 434 static long snd_mixer_oss_conv2(long val, long min, long max)
 435 {
 436         return snd_mixer_oss_conv(val, 0, 100, min, max);
 437 }
 438
 439 #if 0
 440 static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
 441 {
 442         struct snd_mixer_oss *mixer = card->mixer_oss;
 443         if (mixer)
 444                 mixer->mask_recsrc |= 1 << slot;
 445 }
 446
 447 static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
 448 {
 449         struct snd_mixer_oss *mixer = card->mixer_oss;
 450         if (mixer && (mixer->mask_recsrc & (1 << slot)))
 451                 return 1;
 452         return 0;
 453 }
 454 #endif
 455
 456 #define SNDRV_MIXER_OSS_SIGNATURE               0x65999250
 457
 458 #define SNDRV_MIXER_OSS_ITEM_GLOBAL     0
 459 #define SNDRV_MIXER_OSS_ITEM_GSWITCH    1
 460 #define SNDRV_MIXER_OSS_ITEM_GROUTE     2
 461 #define SNDRV_MIXER_OSS_ITEM_GVOLUME    3
 462 #define SNDRV_MIXER_OSS_ITEM_PSWITCH    4
 463 #define SNDRV_MIXER_OSS_ITEM_PROUTE     5
 464 #define SNDRV_MIXER_OSS_ITEM_PVOLUME    6
 465 #define SNDRV_MIXER_OSS_ITEM_CSWITCH    7
 466 #define SNDRV_MIXER_OSS_ITEM_CROUTE     8
 467 #define SNDRV_MIXER_OSS_ITEM_CVOLUME    9
 468 #define SNDRV_MIXER_OSS_ITEM_CAPTURE    10
 469
 470 #define SNDRV_MIXER_OSS_ITEM_COUNT      11
 471
 472 #define SNDRV_MIXER_OSS_PRESENT_GLOBAL  (1<<0)
 473 #define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
 474 #define SNDRV_MIXER_OSS_PRESENT_GROUTE  (1<<2)
 475 #define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
 476 #define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
 477 #define SNDRV_MIXER_OSS_PRESENT_PROUTE  (1<<5)
 478 #define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
 479 #define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
 480 #define SNDRV_MIXER_OSS_PRESENT_CROUTE  (1<<8)
 481 #define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
 482 #define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
 483
 484 struct slot {
 485         unsigned int signature;
 486         unsigned int present;
 487         unsigned int channels;
 488         unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
 489         unsigned int capture_item;
 490         const struct snd_mixer_oss_assign_table *assigned;
 491         unsigned int allocated: 1;
 492 };
 493
 494 #define ID_UNKNOWN      ((unsigned int)-1)
 495
 496 static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
 497 {
 498         struct snd_card *card = mixer->card;
 499         struct snd_ctl_elem_id id;
 500
 501         memset(&id, 0, sizeof(id));
 502         id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 503         strscpy(id.name, name, sizeof(id.name));
 504         id.index = index;
 505         return snd_ctl_find_id(card, &id);
 506 }
 507
 508 static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
 509                                           struct snd_mixer_oss_slot *pslot,
 510                                           unsigned int numid,
 511                                           int *left, int *right)
 512 {
 513         struct snd_ctl_elem_info *uinfo;
 514         struct snd_ctl_elem_value *uctl;
 515         struct snd_kcontrol *kctl;
 516         struct snd_card *card = fmixer->card;
 517
 518         if (numid == ID_UNKNOWN)
 519                 return;
 520         down_read(&card->controls_rwsem);
 521         kctl = snd_ctl_find_numid(card, numid);
 522         if (!kctl) {
 523                 up_read(&card->controls_rwsem);
 524                 return;
 525         }
 526         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 527         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 528         if (uinfo == NULL || uctl == NULL)
 529                 goto __unalloc;
 530         if (kctl->info(kctl, uinfo))
 531                 goto __unalloc;
 532         if (kctl->get(kctl, uctl))
 533                 goto __unalloc;
 534         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
 535             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
 536                 goto __unalloc;
 537         *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
 538         if (uinfo->count > 1)
 539                 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
 540       __unalloc:
 541         up_read(&card->controls_rwsem);
 542         kfree(uctl);
 543         kfree(uinfo);
 544 }
 545
 546 static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
 547                                          struct snd_mixer_oss_slot *pslot,
 548                                          unsigned int numid,
 549                                          int *left, int *right,
 550                                          int route)
 551 {
 552         struct snd_ctl_elem_info *uinfo;
 553         struct snd_ctl_elem_value *uctl;
 554         struct snd_kcontrol *kctl;
 555         struct snd_card *card = fmixer->card;
 556
 557         if (numid == ID_UNKNOWN)
 558                 return;
 559         down_read(&card->controls_rwsem);
 560         kctl = snd_ctl_find_numid(card, numid);
 561         if (!kctl) {
 562                 up_read(&card->controls_rwsem);
 563                 return;
 564         }
 565         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 566         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 567         if (uinfo == NULL || uctl == NULL)
 568                 goto __unalloc;
 569         if (kctl->info(kctl, uinfo))
 570                 goto __unalloc;
 571         if (kctl->get(kctl, uctl))
 572                 goto __unalloc;
 573         if (!uctl->value.integer.value[0]) {
 574                 *left = 0;
 575                 if (uinfo->count == 1)
 576                         *right = 0;
 577         }
 578         if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
 579                 *right = 0;
 580       __unalloc:
 581         up_read(&card->controls_rwsem);
 582         kfree(uctl);
 583         kfree(uinfo);
 584 }
 585
 586 static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
 587                                      struct snd_mixer_oss_slot *pslot,
 588                                      int *left, int *right)
 589 {
 590         struct slot *slot = pslot->private_data;
 591
 592         *left = *right = 100;
 593         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
 594                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
 595         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
 596                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
 597         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
 598                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
 599         }
 600         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
 601                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 602         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
 603                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 604         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
 605                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 606         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
 607                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 608         }
 609         return 0;
 610 }
 611
 612 static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
 613                                           struct snd_mixer_oss_slot *pslot,
 614                                           unsigned int numid,
 615                                           int left, int right)
 616 {
 617         struct snd_ctl_elem_info *uinfo;
 618         struct snd_ctl_elem_value *uctl;
 619         struct snd_kcontrol *kctl;
 620         struct snd_card *card = fmixer->card;
 621         int res;
 622
 623         if (numid == ID_UNKNOWN)
 624                 return;
 625         down_read(&card->controls_rwsem);
 626         kctl = snd_ctl_find_numid(card, numid);
 627         if (!kctl) {
 628                 up_read(&card->controls_rwsem);
 629                 return;
 630         }
 631         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 632         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 633         if (uinfo == NULL || uctl == NULL)
 634                 goto __unalloc;
 635         if (kctl->info(kctl, uinfo))
 636                 goto __unalloc;
 637         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
 638             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
 639                 goto __unalloc;
 640         uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
 641         if (uinfo->count > 1)
 642                 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
 643         res = kctl->put(kctl, uctl);
 644         if (res < 0)
 645                 goto __unalloc;
 646         if (res > 0)
 647                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 648       __unalloc:
 649         up_read(&card->controls_rwsem);
 650         kfree(uctl);
 651         kfree(uinfo);
 652 }
 653
 654 static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
 655                                          struct snd_mixer_oss_slot *pslot,
 656                                          unsigned int numid,
 657                                          int left, int right,
 658                                          int route)
 659 {
 660         struct snd_ctl_elem_info *uinfo;
 661         struct snd_ctl_elem_value *uctl;
 662         struct snd_kcontrol *kctl;
 663         struct snd_card *card = fmixer->card;
 664         int res;
 665
 666         if (numid == ID_UNKNOWN)
 667                 return;
 668         down_read(&card->controls_rwsem);
 669         kctl = snd_ctl_find_numid(card, numid);
 670         if (!kctl) {
 671                 up_read(&card->controls_rwsem);
 672                 return;
 673         }
 674         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 675         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 676         if (uinfo == NULL || uctl == NULL)
 677                 goto __unalloc;
 678         if (kctl->info(kctl, uinfo))
 679                 goto __unalloc;
 680         if (uinfo->count > 1) {
 681                 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
 682                 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
 683                 if (route) {
 684                         uctl->value.integer.value[1] =
 685                         uctl->value.integer.value[2] = 0;
 686                 }
 687         } else {
 688                 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
 689         }
 690         res = kctl->put(kctl, uctl);
 691         if (res < 0)
 692                 goto __unalloc;
 693         if (res > 0)
 694                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 695       __unalloc:
 696         up_read(&card->controls_rwsem);
 697         kfree(uctl);
 698         kfree(uinfo);
 699 }
 700
 701 static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
 702                                      struct snd_mixer_oss_slot *pslot,
 703                                      int left, int right)
 704 {
 705         struct slot *slot = pslot->private_data;
 706
 707         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
 708                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
 709                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
 710                         snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
 711         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
 712                 snd_mixer_oss_put_volume1_vol(fmixer, pslot,
 713                         slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
 714         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
 715                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
 716         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
 717                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
 718         }
 719         if (left || right) {
 720                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
 721                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 722                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
 723                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
 724                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
 725                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 726                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
 727                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 728                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
 729                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
 730                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
 731                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 732         } else {
 733                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
 734                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 735                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
 736                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
 737                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
 738                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 739                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
 740                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 741                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
 742                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
 743                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
 744                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 745                 }
 746         }
 747         return 0;
 748 }
 749
 750 static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
 751                                         struct snd_mixer_oss_slot *pslot,
 752                                         int *active)
 753 {
 754         struct slot *slot = pslot->private_data;
 755         int left, right;
 756
 757         left = right = 1;
 758         snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
 759         *active = (left || right) ? 1 : 0;
 760         return 0;
 761 }
 762
 763 static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
 764                                            struct snd_mixer_oss_slot *pslot,
 765                                            int *active)
 766 {
 767         struct slot *slot = pslot->private_data;
 768         int left, right;
 769
 770         left = right = 1;
 771         snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
 772         *active = (left || right) ? 1 : 0;
 773         return 0;
 774 }
 775
 776 static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
 777                                         struct snd_mixer_oss_slot *pslot,
 778                                         int active)
 779 {
 780         struct slot *slot = pslot->private_data;
 781
 782         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
 783         return 0;
 784 }
 785
 786 static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
 787                                            struct snd_mixer_oss_slot *pslot,
 788                                            int active)
 789 {
 790         struct slot *slot = pslot->private_data;
 791
 792         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
 793         return 0;
 794 }
 795
 796 static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
 797 {
 798         struct snd_card *card = fmixer->card;
 799         struct snd_mixer_oss *mixer = fmixer->mixer;
 800         struct snd_kcontrol *kctl;
 801         struct snd_mixer_oss_slot *pslot;
 802         struct slot *slot;
 803         struct snd_ctl_elem_info *uinfo;
 804         struct snd_ctl_elem_value *uctl;
 805         int err, idx;
 806
 807         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 808         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 809         if (uinfo == NULL || uctl == NULL) {
 810                 err = -ENOMEM;
 811                 goto __free_only;
 812         }
 813         down_read(&card->controls_rwsem);
 814         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
 815         if (! kctl) {
 816                 err = -ENOENT;
 817                 goto __unlock;
 818         }
 819         err = kctl->info(kctl, uinfo);
 820         if (err < 0)
 821                 goto __unlock;
 822         err = kctl->get(kctl, uctl);
 823         if (err < 0)
 824                 goto __unlock;
 825         for (idx = 0; idx < 32; idx++) {
 826                 if (!(mixer->mask_recsrc & (1 << idx)))
 827                         continue;
 828                 pslot = &mixer->slots[idx];
 829                 slot = pslot->private_data;
 830                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
 831                         continue;
 832                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
 833                         continue;
 834                 if (slot->capture_item == uctl->value.enumerated.item[0]) {
 835                         *active_index = idx;
 836                         break;
 837                 }
 838         }
 839         err = 0;
 840       __unlock:
 841         up_read(&card->controls_rwsem);
 842       __free_only:
 843         kfree(uctl);
 844         kfree(uinfo);
 845         return err;
 846 }
 847
 848 static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
 849 {
 850         struct snd_card *card = fmixer->card;
 851         struct snd_mixer_oss *mixer = fmixer->mixer;
 852         struct snd_kcontrol *kctl;
 853         struct snd_mixer_oss_slot *pslot;
 854         struct slot *slot = NULL;
 855         struct snd_ctl_elem_info *uinfo;
 856         struct snd_ctl_elem_value *uctl;
 857         int err;
 858         unsigned int idx;
 859
 860         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 861         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 862         if (uinfo == NULL || uctl == NULL) {
 863                 err = -ENOMEM;
 864                 goto __free_only;
 865         }
 866         down_read(&card->controls_rwsem);
 867         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
 868         if (! kctl) {
 869                 err = -ENOENT;
 870                 goto __unlock;
 871         }
 872         err = kctl->info(kctl, uinfo);
 873         if (err < 0)
 874                 goto __unlock;
 875         for (idx = 0; idx < 32; idx++) {
 876                 if (!(mixer->mask_recsrc & (1 << idx)))
 877                         continue;
 878                 pslot = &mixer->slots[idx];
 879                 slot = pslot->private_data;
 880                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
 881                         continue;
 882                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
 883                         continue;
 884                 if (idx == active_index)
 885                         break;
 886                 slot = NULL;
 887         }
 888         if (! slot)
 889                 goto __unlock;
 890         for (idx = 0; idx < uinfo->count; idx++)
 891                 uctl->value.enumerated.item[idx] = slot->capture_item;
 892         err = kctl->put(kctl, uctl);
 893         if (err > 0)
 894                 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 895         err = 0;
 896       __unlock:
 897         up_read(&card->controls_rwsem);
 898       __free_only:
 899         kfree(uctl);
 900         kfree(uinfo);
 901         return err;
 902 }
 903
 904 struct snd_mixer_oss_assign_table {
 905         int oss_id;
 906         const char *name;
 907         int index;
 908 };
 909
 910 static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
 911 {
 912         struct snd_ctl_elem_info *info;
 913         struct snd_kcontrol *kcontrol;
 914         struct snd_card *card = mixer->card;
 915         int err;
 916
 917         down_read(&card->controls_rwsem);
 918         kcontrol = snd_mixer_oss_test_id(mixer, name, index);
 919         if (kcontrol == NULL) {
 920                 up_read(&card->controls_rwsem);
 921                 return 0;
 922         }
 923         info = kmalloc(sizeof(*info), GFP_KERNEL);
 924         if (! info) {
 925                 up_read(&card->controls_rwsem);
 926                 return -ENOMEM;
 927         }
 928         err = kcontrol->info(kcontrol, info);
 929         if (err < 0) {
 930                 up_read(&card->controls_rwsem);
 931                 kfree(info);
 932                 return err;
 933         }
 934         slot->numid[item] = kcontrol->id.numid;
 935         up_read(&card->controls_rwsem);
 936         if (info->count > slot->channels)
 937                 slot->channels = info->count;
 938         slot->present |= 1 << item;
 939         kfree(info);
 940         return 0;
 941 }
 942
 943 static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
 944 {
 945         struct slot *p = chn->private_data;
 946         if (p) {
 947                 if (p->allocated && p->assigned) {
 948                         kfree_const(p->assigned->name);
 949                         kfree_const(p->assigned);
 950                 }
 951                 kfree(p);
 952         }
 953 }
 954
 955 static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
 956 {
 957         int idx = rslot->number; /* remember this */
 958         if (rslot->private_free)
 959                 rslot->private_free(rslot);
 960         memset(rslot, 0, sizeof(*rslot));
 961         rslot->number = idx;
 962 }
 963
 964 /* In a separate function to keep gcc 3.2 happy - do NOT merge this in
 965    snd_mixer_oss_build_input! */
 966 static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
 967                                         const struct snd_mixer_oss_assign_table *ptr,
 968                                         struct slot *slot)
 969 {
 970         char str[64];
 971         int err;
 972
 973         err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
 974                                        SNDRV_MIXER_OSS_ITEM_GLOBAL);
 975         if (err)
 976                 return err;
 977         sprintf(str, "%s Switch", ptr->name);
 978         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 979                                        SNDRV_MIXER_OSS_ITEM_GSWITCH);
 980         if (err)
 981                 return err;
 982         sprintf(str, "%s Route", ptr->name);
 983         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 984                                        SNDRV_MIXER_OSS_ITEM_GROUTE);
 985         if (err)
 986                 return err;
 987         sprintf(str, "%s Volume", ptr->name);
 988         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 989                                        SNDRV_MIXER_OSS_ITEM_GVOLUME);
 990         if (err)
 991                 return err;
 992         sprintf(str, "%s Playback Switch", ptr->name);
 993         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 994                                        SNDRV_MIXER_OSS_ITEM_PSWITCH);
 995         if (err)
 996                 return err;
 997         sprintf(str, "%s Playback Route", ptr->name);
 998         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 999                                        SNDRV_MIXER_OSS_ITEM_PROUTE);
1000         if (err)
1001                 return err;
1002         sprintf(str, "%s Playback Volume", ptr->name);
1003         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1004                                        SNDRV_MIXER_OSS_ITEM_PVOLUME);
1005         if (err)
1006                 return err;
1007         sprintf(str, "%s Capture Switch", ptr->name);
1008         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1009                                        SNDRV_MIXER_OSS_ITEM_CSWITCH);
1010         if (err)
1011                 return err;
1012         sprintf(str, "%s Capture Route", ptr->name);
1013         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1014                                        SNDRV_MIXER_OSS_ITEM_CROUTE);
1015         if (err)
1016                 return err;
1017         sprintf(str, "%s Capture Volume", ptr->name);
1018         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1019                                        SNDRV_MIXER_OSS_ITEM_CVOLUME);
1020         if (err)
1021                 return err;
1022
1023         return 0;
1024 }
1025
1026 /*
1027  * build an OSS mixer element.
1028  * ptr_allocated means the entry is dynamically allocated (change via proc file).
1029  * when replace_old = 1, the old entry is replaced with the new one.
1030  */
1031 static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
1032                                      const struct snd_mixer_oss_assign_table *ptr,
1033                                      int ptr_allocated, int replace_old)
1034 {
1035         struct slot slot;
1036         struct slot *pslot;
1037         struct snd_kcontrol *kctl;
1038         struct snd_mixer_oss_slot *rslot;
1039         char str[64];
1040
1041         /* check if already assigned */
1042         if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
1043                 return 0;
1044
1045         memset(&slot, 0, sizeof(slot));
1046         memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1047         if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1048                 return 0;
1049         down_read(&mixer->card->controls_rwsem);
1050         kctl = NULL;
1051         if (!ptr->index)
1052                 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
1053         if (kctl) {
1054                 struct snd_ctl_elem_info *uinfo;
1055
1056                 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1057                 if (! uinfo) {
1058                         up_read(&mixer->card->controls_rwsem);
1059                         return -ENOMEM;
1060                 }
1061
1062                 if (kctl->info(kctl, uinfo)) {
1063                         up_read(&mixer->card->controls_rwsem);
1064                         kfree(uinfo);
1065                         return 0;
1066                 }
1067                 strcpy(str, ptr->name);
1068                 if (!strcmp(str, "Master"))
1069                         strcpy(str, "Mix");
1070                 if (!strcmp(str, "Master Mono"))
1071                         strcpy(str, "Mix Mono");
1072                 slot.capture_item = 0;
1073                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1074                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1075                 } else {
1076                         for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1077                                 uinfo->value.enumerated.item = slot.capture_item;
1078                                 if (kctl->info(kctl, uinfo)) {
1079                                         up_read(&mixer->card->controls_rwsem);
1080                                         kfree(uinfo);
1081                                         return 0;
1082                                 }
1083                                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1084                                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1085                                         break;
1086                                 }
1087                         }
1088                 }
1089                 kfree(uinfo);
1090         }
1091         up_read(&mixer->card->controls_rwsem);
1092         if (slot.present != 0) {
1093                 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1094                 if (! pslot)
1095                         return -ENOMEM;
1096                 *pslot = slot;
1097                 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1098                 pslot->assigned = ptr;
1099                 pslot->allocated = ptr_allocated;
1100                 rslot = &mixer->slots[ptr->oss_id];
1101                 mixer_slot_clear(rslot);
1102                 rslot->stereo = slot.channels > 1 ? 1 : 0;
1103                 rslot->get_volume = snd_mixer_oss_get_volume1;
1104                 rslot->put_volume = snd_mixer_oss_put_volume1;
1105                 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1106                 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1107                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1108                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1109                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1110                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1111                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1112                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1113                         mixer->mask_recsrc |= 1 << ptr->oss_id;
1114                 }
1115                 rslot->private_data = pslot;
1116                 rslot->private_free = snd_mixer_oss_slot_free;
1117                 return 1;
1118         }
1119         return 0;
1120 }
1121
1122 #ifdef CONFIG_SND_PROC_FS
1123 /*
1124  */
1125 #define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1126 static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1127         MIXER_VOL(VOLUME),
1128         MIXER_VOL(BASS),
1129         MIXER_VOL(TREBLE),
1130         MIXER_VOL(SYNTH),
1131         MIXER_VOL(PCM),
1132         MIXER_VOL(SPEAKER),
1133         MIXER_VOL(LINE),
1134         MIXER_VOL(MIC),
1135         MIXER_VOL(CD),
1136         MIXER_VOL(IMIX),
1137         MIXER_VOL(ALTPCM),
1138         MIXER_VOL(RECLEV),
1139         MIXER_VOL(IGAIN),
1140         MIXER_VOL(OGAIN),
1141         MIXER_VOL(LINE1),
1142         MIXER_VOL(LINE2),
1143         MIXER_VOL(LINE3),
1144         MIXER_VOL(DIGITAL1),
1145         MIXER_VOL(DIGITAL2),
1146         MIXER_VOL(DIGITAL3),
1147         MIXER_VOL(PHONEIN),
1148         MIXER_VOL(PHONEOUT),
1149         MIXER_VOL(VIDEO),
1150         MIXER_VOL(RADIO),
1151         MIXER_VOL(MONITOR),
1152 };
1153
1154 /*
1155  *  /proc interface
1156  */
1157
1158 static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1159                                     struct snd_info_buffer *buffer)
1160 {
1161         struct snd_mixer_oss *mixer = entry->private_data;
1162         int i;
1163
1164         mutex_lock(&mixer->reg_mutex);
1165         for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1166                 struct slot *p;
1167
1168                 if (! oss_mixer_names[i])
1169                         continue;
1170                 p = (struct slot *)mixer->slots[i].private_data;
1171                 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1172                 if (p && p->assigned)
1173                         snd_iprintf(buffer, "\"%s\" %d\n",
1174                                     p->assigned->name,
1175                                     p->assigned->index);
1176                 else
1177                         snd_iprintf(buffer, "\"\" 0\n");
1178         }
1179         mutex_unlock(&mixer->reg_mutex);
1180 }
1181
1182 static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1183                                      struct snd_info_buffer *buffer)
1184 {
1185         struct snd_mixer_oss *mixer = entry->private_data;
1186         char line[128], str[32], idxstr[16];
1187         const char *cptr;
1188         unsigned int idx;
1189         int ch;
1190         struct snd_mixer_oss_assign_table *tbl;
1191         struct slot *slot;
1192
1193         while (!snd_info_get_line(buffer, line, sizeof(line))) {
1194                 cptr = snd_info_get_str(str, line, sizeof(str));
1195                 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1196                         if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1197                                 break;
1198                 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1199                         pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
1200                                str);
1201                         continue;
1202                 }
1203                 cptr = snd_info_get_str(str, cptr, sizeof(str));
1204                 if (! *str) {
1205                         /* remove the entry */
1206                         mutex_lock(&mixer->reg_mutex);
1207                         mixer_slot_clear(&mixer->slots[ch]);
1208                         mutex_unlock(&mixer->reg_mutex);
1209                         continue;
1210                 }
1211                 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1212                 idx = simple_strtoul(idxstr, NULL, 10);
1213                 if (idx >= 0x4000) { /* too big */
1214                         pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
1215                         continue;
1216                 }
1217                 mutex_lock(&mixer->reg_mutex);
1218                 slot = (struct slot *)mixer->slots[ch].private_data;
1219                 if (slot && slot->assigned &&
1220                     slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
1221                         /* not changed */
1222                         goto __unlock;
1223                 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1224                 if (!tbl)
1225                         goto __unlock;
1226                 tbl->oss_id = ch;
1227                 tbl->name = kstrdup(str, GFP_KERNEL);
1228                 if (! tbl->name) {
1229                         kfree(tbl);
1230                         goto __unlock;
1231                 }
1232                 tbl->index = idx;
1233                 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1234                         kfree(tbl->name);
1235                         kfree(tbl);
1236                 }
1237         __unlock:
1238                 mutex_unlock(&mixer->reg_mutex);
1239         }
1240 }
1241
1242 static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1243 {
1244         struct snd_info_entry *entry;
1245
1246         entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1247                                            mixer->card->proc_root);
1248         if (! entry)
1249                 return;
1250         entry->content = SNDRV_INFO_CONTENT_TEXT;
1251         entry->mode = S_IFREG | 0644;
1252         entry->c.text.read = snd_mixer_oss_proc_read;
1253         entry->c.text.write = snd_mixer_oss_proc_write;
1254         entry->private_data = mixer;
1255         if (snd_info_register(entry) < 0) {
1256                 snd_info_free_entry(entry);
1257                 entry = NULL;
1258         }
1259         mixer->proc_entry = entry;
1260 }
1261
1262 static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1263 {
1264         snd_info_free_entry(mixer->proc_entry);
1265         mixer->proc_entry = NULL;
1266 }
1267 #else /* !CONFIG_SND_PROC_FS */
1268 #define snd_mixer_oss_proc_init(mix)
1269 #define snd_mixer_oss_proc_done(mix)
1270 #endif /* CONFIG_SND_PROC_FS */
1271
1272 static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1273 {
1274         static const struct snd_mixer_oss_assign_table table[] = {
1275                 { SOUND_MIXER_VOLUME,   "Master",               0 },
1276                 { SOUND_MIXER_VOLUME,   "Front",                0 }, /* fallback */
1277                 { SOUND_MIXER_BASS,     "Tone Control - Bass",  0 },
1278                 { SOUND_MIXER_TREBLE,   "Tone Control - Treble", 0 },
1279                 { SOUND_MIXER_SYNTH,    "Synth",                0 },
1280                 { SOUND_MIXER_SYNTH,    "FM",                   0 }, /* fallback */
1281                 { SOUND_MIXER_SYNTH,    "Music",                0 }, /* fallback */
1282                 { SOUND_MIXER_PCM,      "PCM",                  0 },
1283                 { SOUND_MIXER_SPEAKER,  "Beep",                 0 },
1284                 { SOUND_MIXER_SPEAKER,  "PC Speaker",           0 }, /* fallback */
1285                 { SOUND_MIXER_SPEAKER,  "Speaker",              0 }, /* fallback */
1286                 { SOUND_MIXER_LINE,     "Line",                 0 },
1287                 { SOUND_MIXER_MIC,      "Mic",                  0 },
1288                 { SOUND_MIXER_CD,       "CD",                   0 },
1289                 { SOUND_MIXER_IMIX,     "Monitor Mix",          0 },
1290                 { SOUND_MIXER_ALTPCM,   "PCM",                  1 },
1291                 { SOUND_MIXER_ALTPCM,   "Headphone",            0 }, /* fallback */
1292                 { SOUND_MIXER_ALTPCM,   "Wave",                 0 }, /* fallback */
1293                 { SOUND_MIXER_RECLEV,   "-- nothing --",        0 },
1294                 { SOUND_MIXER_IGAIN,    "Capture",              0 },
1295                 { SOUND_MIXER_OGAIN,    "Playback",             0 },
1296                 { SOUND_MIXER_LINE1,    "Aux",                  0 },
1297                 { SOUND_MIXER_LINE2,    "Aux",                  1 },
1298                 { SOUND_MIXER_LINE3,    "Aux",                  2 },
1299                 { SOUND_MIXER_DIGITAL1, "Digital",              0 },
1300                 { SOUND_MIXER_DIGITAL1, "IEC958",               0 }, /* fallback */
1301                 { SOUND_MIXER_DIGITAL1, "IEC958 Optical",       0 }, /* fallback */
1302                 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial",       0 }, /* fallback */
1303                 { SOUND_MIXER_DIGITAL2, "Digital",              1 },
1304                 { SOUND_MIXER_DIGITAL3, "Digital",              2 },
1305                 { SOUND_MIXER_PHONEIN,  "Phone",                0 },
1306                 { SOUND_MIXER_PHONEOUT, "Master Mono",          0 },
1307                 { SOUND_MIXER_PHONEOUT, "Speaker",              0 }, /*fallback*/
1308                 { SOUND_MIXER_PHONEOUT, "Mono",                 0 }, /*fallback*/
1309                 { SOUND_MIXER_PHONEOUT, "Phone",                0 }, /* fallback */
1310                 { SOUND_MIXER_VIDEO,    "Video",                0 },
1311                 { SOUND_MIXER_RADIO,    "Radio",                0 },
1312                 { SOUND_MIXER_MONITOR,  "Monitor",              0 }
1313         };
1314         unsigned int idx;
1315
1316         for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1317                 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1318         if (mixer->mask_recsrc) {
1319                 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1320                 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1321         }
1322 }
1323
1324 /*
1325  *
1326  */
1327
1328 static int snd_mixer_oss_free1(void *private)
1329 {
1330         struct snd_mixer_oss *mixer = private;
1331         struct snd_card *card;
1332         int idx;
1333
1334         if (!mixer)
1335                 return 0;
1336         card = mixer->card;
1337         if (snd_BUG_ON(mixer != card->mixer_oss))
1338                 return -ENXIO;
1339         card->mixer_oss = NULL;
1340         for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1341                 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1342                 if (chn->private_free)
1343                         chn->private_free(chn);
1344         }
1345         kfree(mixer);
1346         return 0;
1347 }
1348
1349 static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1350 {
1351         struct snd_mixer_oss *mixer;
1352
1353         if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1354                 int idx, err;
1355
1356                 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1357                 if (mixer == NULL)
1358                         return -ENOMEM;
1359                 mutex_init(&mixer->reg_mutex);
1360                 err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1361                                               card, 0,
1362                                               &snd_mixer_oss_f_ops, card);
1363                 if (err < 0) {
1364                         dev_err(card->dev,
1365                                 "unable to register OSS mixer device %i:%i\n",
1366                                 card->number, 0);
1367                         kfree(mixer);
1368                         return err;
1369                 }
1370                 mixer->oss_dev_alloc = 1;
1371                 mixer->card = card;
1372                 if (*card->mixername)
1373                         strscpy(mixer->name, card->mixername, sizeof(mixer->name));
1374                 else
1375                         snprintf(mixer->name, sizeof(mixer->name),
1376                                  "mixer%i", card->number);
1377 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1378                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1379                                       card->number,
1380                                       mixer->name);
1381 #endif
1382                 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1383                         mixer->slots[idx].number = idx;
1384                 card->mixer_oss = mixer;
1385                 snd_mixer_oss_build(mixer);
1386                 snd_mixer_oss_proc_init(mixer);
1387         } else {
1388                 mixer = card->mixer_oss;
1389                 if (mixer == NULL)
1390                         return 0;
1391                 if (mixer->oss_dev_alloc) {
1392 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1393                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1394 #endif
1395                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1396                         mixer->oss_dev_alloc = 0;
1397                 }
1398                 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1399                         return 0;
1400                 snd_mixer_oss_proc_done(mixer);
1401                 return snd_mixer_oss_free1(mixer);
1402         }
1403         return 0;
1404 }
1405
1406 static int __init alsa_mixer_oss_init(void)
1407 {
1408         struct snd_card *card;
1409         int idx;
1410
1411         snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1412         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1413                 card = snd_card_ref(idx);
1414                 if (card) {
1415                         snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
1416                         snd_card_unref(card);
1417                 }
1418         }
1419         return 0;
1420 }
1421
1422 static void __exit alsa_mixer_oss_exit(void)
1423 {
1424         struct snd_card *card;
1425         int idx;
1426
1427         snd_mixer_oss_notify_callback = NULL;
1428         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1429                 card = snd_card_ref(idx);
1430                 if (card) {
1431                         snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
1432                         snd_card_unref(card);
1433                 }
1434         }
1435 }
1436
1437 module_init(alsa_mixer_oss_init)
1438 module_exit(alsa_mixer_oss_exit)