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