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 <[email protected]>
   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 <[email protected]>");
  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         .unlocked_ioctl =       snd_mixer_oss_ioctl,
 416         .compat_ioctl = snd_mixer_oss_ioctl_compat,
 417 };
 418
 419 /*
 420  *  utilities
 421  */
 422
 423 static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
 424 {
 425         long orange = omax - omin, nrange = nmax - nmin;
 426
 427         if (orange == 0)
 428                 return 0;
 429         return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin;
 430 }
 431
 432 /* convert from alsa native to oss values (0-100) */
 433 static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
 434 {
 435         if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
 436                 return *old;
 437         return snd_mixer_oss_conv(val, min, max, 0, 100);
 438 }
 439
 440 /* convert from oss to alsa native values */
 441 static long snd_mixer_oss_conv2(long val, long min, long max)
 442 {
 443         return snd_mixer_oss_conv(val, 0, 100, min, max);
 444 }
 445
 446 #if 0
 447 static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
 448 {
 449         struct snd_mixer_oss *mixer = card->mixer_oss;
 450         if (mixer)
 451                 mixer->mask_recsrc |= 1 << slot;
 452 }
 453
 454 static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
 455 {
 456         struct snd_mixer_oss *mixer = card->mixer_oss;
 457         if (mixer && (mixer->mask_recsrc & (1 << slot)))
 458                 return 1;
 459         return 0;
 460 }
 461 #endif
 462
 463 #define SNDRV_MIXER_OSS_SIGNATURE               0x65999250
 464
 465 #define SNDRV_MIXER_OSS_ITEM_GLOBAL     0
 466 #define SNDRV_MIXER_OSS_ITEM_GSWITCH    1
 467 #define SNDRV_MIXER_OSS_ITEM_GROUTE     2
 468 #define SNDRV_MIXER_OSS_ITEM_GVOLUME    3
 469 #define SNDRV_MIXER_OSS_ITEM_PSWITCH    4
 470 #define SNDRV_MIXER_OSS_ITEM_PROUTE     5
 471 #define SNDRV_MIXER_OSS_ITEM_PVOLUME    6
 472 #define SNDRV_MIXER_OSS_ITEM_CSWITCH    7
 473 #define SNDRV_MIXER_OSS_ITEM_CROUTE     8
 474 #define SNDRV_MIXER_OSS_ITEM_CVOLUME    9
 475 #define SNDRV_MIXER_OSS_ITEM_CAPTURE    10
 476
 477 #define SNDRV_MIXER_OSS_ITEM_COUNT      11
 478
 479 #define SNDRV_MIXER_OSS_PRESENT_GLOBAL  (1<<0)
 480 #define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
 481 #define SNDRV_MIXER_OSS_PRESENT_GROUTE  (1<<2)
 482 #define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
 483 #define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
 484 #define SNDRV_MIXER_OSS_PRESENT_PROUTE  (1<<5)
 485 #define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
 486 #define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
 487 #define SNDRV_MIXER_OSS_PRESENT_CROUTE  (1<<8)
 488 #define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
 489 #define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
 490
 491 struct slot {
 492         unsigned int signature;
 493         unsigned int present;
 494         unsigned int channels;
 495         unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
 496         unsigned int capture_item;
 497         const struct snd_mixer_oss_assign_table *assigned;
 498         unsigned int allocated: 1;
 499 };
 500
 501 #define ID_UNKNOWN      ((unsigned int)-1)
 502
 503 static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
 504 {
 505         struct snd_card *card = mixer->card;
 506         struct snd_ctl_elem_id id;
 507
 508         memset(&id, 0, sizeof(id));
 509         id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 510         strscpy(id.name, name, sizeof(id.name));
 511         id.index = index;
 512         return snd_ctl_find_id(card, &id);
 513 }
 514
 515 static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
 516                                           struct snd_mixer_oss_slot *pslot,
 517                                           unsigned int numid,
 518                                           int *left, int *right)
 519 {
 520         struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
 521         struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
 522         struct snd_kcontrol *kctl;
 523         struct snd_card *card = fmixer->card;
 524
 525         if (numid == ID_UNKNOWN)
 526                 return;
 527         guard(rwsem_read)(&card->controls_rwsem);
 528         kctl = snd_ctl_find_numid(card, numid);
 529         if (!kctl)
 530                 return;
 531         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 532         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 533         if (uinfo == NULL || uctl == NULL)
 534                 return;
 535         if (kctl->info(kctl, uinfo))
 536                 return;
 537         if (kctl->get(kctl, uctl))
 538                 return;
 539         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
 540             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
 541                 return;
 542         *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
 543         if (uinfo->count > 1)
 544                 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
 545 }
 546
 547 static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
 548                                          struct snd_mixer_oss_slot *pslot,
 549                                          unsigned int numid,
 550                                          int *left, int *right,
 551                                          int route)
 552 {
 553         struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
 554         struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
 555         struct snd_kcontrol *kctl;
 556         struct snd_card *card = fmixer->card;
 557
 558         if (numid == ID_UNKNOWN)
 559                 return;
 560         guard(rwsem_read)(&card->controls_rwsem);
 561         kctl = snd_ctl_find_numid(card, numid);
 562         if (!kctl)
 563                 return;
 564         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 565         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 566         if (uinfo == NULL || uctl == NULL)
 567                 return;
 568         if (kctl->info(kctl, uinfo))
 569                 return;
 570         if (kctl->get(kctl, uctl))
 571                 return;
 572         if (!uctl->value.integer.value[0]) {
 573                 *left = 0;
 574                 if (uinfo->count == 1)
 575                         *right = 0;
 576         }
 577         if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
 578                 *right = 0;
 579 }
 580
 581 static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
 582                                      struct snd_mixer_oss_slot *pslot,
 583                                      int *left, int *right)
 584 {
 585         struct slot *slot = pslot->private_data;
 586
 587         *left = *right = 100;
 588         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
 589                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
 590         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
 591                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
 592         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
 593                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
 594         }
 595         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
 596                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 597         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
 598                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 599         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
 600                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 601         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
 602                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 603         }
 604         return 0;
 605 }
 606
 607 static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
 608                                           struct snd_mixer_oss_slot *pslot,
 609                                           unsigned int numid,
 610                                           int left, int right)
 611 {
 612         struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
 613         struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
 614         struct snd_kcontrol *kctl;
 615         struct snd_card *card = fmixer->card;
 616         int res;
 617
 618         if (numid == ID_UNKNOWN)
 619                 return;
 620         guard(rwsem_read)(&card->controls_rwsem);
 621         kctl = snd_ctl_find_numid(card, numid);
 622         if (!kctl)
 623                 return;
 624         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 625         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 626         if (uinfo == NULL || uctl == NULL)
 627                 return;
 628         if (kctl->info(kctl, uinfo))
 629                 return;
 630         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
 631             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
 632                 return;
 633         uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
 634         if (uinfo->count > 1)
 635                 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
 636         res = kctl->put(kctl, uctl);
 637         if (res < 0)
 638                 return;
 639         if (res > 0)
 640                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 641 }
 642
 643 static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
 644                                          struct snd_mixer_oss_slot *pslot,
 645                                          unsigned int numid,
 646                                          int left, int right,
 647                                          int route)
 648 {
 649         struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
 650         struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
 651         struct snd_kcontrol *kctl;
 652         struct snd_card *card = fmixer->card;
 653         int res;
 654
 655         if (numid == ID_UNKNOWN)
 656                 return;
 657         guard(rwsem_read)(&card->controls_rwsem);
 658         kctl = snd_ctl_find_numid(card, numid);
 659         if (!kctl)
 660                 return;
 661         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 662         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 663         if (uinfo == NULL || uctl == NULL)
 664                 return;
 665         if (kctl->info(kctl, uinfo))
 666                 return;
 667         if (uinfo->count > 1) {
 668                 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
 669                 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
 670                 if (route) {
 671                         uctl->value.integer.value[1] =
 672                         uctl->value.integer.value[2] = 0;
 673                 }
 674         } else {
 675                 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
 676         }
 677         res = kctl->put(kctl, uctl);
 678         if (res < 0)
 679                 return;
 680         if (res > 0)
 681                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 682 }
 683
 684 static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
 685                                      struct snd_mixer_oss_slot *pslot,
 686                                      int left, int right)
 687 {
 688         struct slot *slot = pslot->private_data;
 689
 690         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
 691                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
 692                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
 693                         snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
 694         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
 695                 snd_mixer_oss_put_volume1_vol(fmixer, pslot,
 696                         slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
 697         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
 698                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
 699         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
 700                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
 701         }
 702         if (left || right) {
 703                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
 704                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 705                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
 706                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
 707                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
 708                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 709                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
 710                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 711                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
 712                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
 713                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
 714                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 715         } else {
 716                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
 717                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 718                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
 719                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
 720                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
 721                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 722                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
 723                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 724                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
 725                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
 726                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
 727                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 728                 }
 729         }
 730         return 0;
 731 }
 732
 733 static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
 734                                         struct snd_mixer_oss_slot *pslot,
 735                                         int *active)
 736 {
 737         struct slot *slot = pslot->private_data;
 738         int left, right;
 739
 740         left = right = 1;
 741         snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
 742         *active = (left || right) ? 1 : 0;
 743         return 0;
 744 }
 745
 746 static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
 747                                            struct snd_mixer_oss_slot *pslot,
 748                                            int *active)
 749 {
 750         struct slot *slot = pslot->private_data;
 751         int left, right;
 752
 753         left = right = 1;
 754         snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
 755         *active = (left || right) ? 1 : 0;
 756         return 0;
 757 }
 758
 759 static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
 760                                         struct snd_mixer_oss_slot *pslot,
 761                                         int active)
 762 {
 763         struct slot *slot = pslot->private_data;
 764
 765         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
 766         return 0;
 767 }
 768
 769 static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
 770                                            struct snd_mixer_oss_slot *pslot,
 771                                            int active)
 772 {
 773         struct slot *slot = pslot->private_data;
 774
 775         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
 776         return 0;
 777 }
 778
 779 static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
 780 {
 781         struct snd_card *card = fmixer->card;
 782         struct snd_mixer_oss *mixer = fmixer->mixer;
 783         struct snd_kcontrol *kctl;
 784         struct snd_mixer_oss_slot *pslot;
 785         struct slot *slot;
 786         struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
 787         struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
 788         int err, idx;
 789
 790         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 791         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 792         if (uinfo == NULL || uctl == NULL)
 793                 return -ENOMEM;
 794         guard(rwsem_read)(&card->controls_rwsem);
 795         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
 796         if (!kctl)
 797                 return -ENOENT;
 798         err = kctl->info(kctl, uinfo);
 799         if (err < 0)
 800                 return err;
 801         err = kctl->get(kctl, uctl);
 802         if (err < 0)
 803                 return err;
 804         for (idx = 0; idx < 32; idx++) {
 805                 if (!(mixer->mask_recsrc & (1 << idx)))
 806                         continue;
 807                 pslot = &mixer->slots[idx];
 808                 slot = pslot->private_data;
 809                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
 810                         continue;
 811                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
 812                         continue;
 813                 if (slot->capture_item == uctl->value.enumerated.item[0]) {
 814                         *active_index = idx;
 815                         break;
 816                 }
 817         }
 818         return 0;
 819 }
 820
 821 static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
 822 {
 823         struct snd_card *card = fmixer->card;
 824         struct snd_mixer_oss *mixer = fmixer->mixer;
 825         struct snd_kcontrol *kctl;
 826         struct snd_mixer_oss_slot *pslot;
 827         struct slot *slot = NULL;
 828         struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
 829         struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
 830         int err;
 831         unsigned int idx;
 832
 833         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 834         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 835         if (uinfo == NULL || uctl == NULL)
 836                 return -ENOMEM;
 837         guard(rwsem_read)(&card->controls_rwsem);
 838         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
 839         if (!kctl)
 840                 return -ENOENT;
 841         err = kctl->info(kctl, uinfo);
 842         if (err < 0)
 843                 return err;
 844         for (idx = 0; idx < 32; idx++) {
 845                 if (!(mixer->mask_recsrc & (1 << idx)))
 846                         continue;
 847                 pslot = &mixer->slots[idx];
 848                 slot = pslot->private_data;
 849                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
 850                         continue;
 851                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
 852                         continue;
 853                 if (idx == active_index)
 854                         break;
 855                 slot = NULL;
 856         }
 857         if (!slot)
 858                 return 0;
 859         for (idx = 0; idx < uinfo->count; idx++)
 860                 uctl->value.enumerated.item[idx] = slot->capture_item;
 861         err = kctl->put(kctl, uctl);
 862         if (err > 0)
 863                 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 864         return 0;
 865 }
 866
 867 struct snd_mixer_oss_assign_table {
 868         int oss_id;
 869         const char *name;
 870         int index;
 871 };
 872
 873 static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
 874 {
 875         struct snd_ctl_elem_info *info __free(kfree) = NULL;
 876         struct snd_kcontrol *kcontrol;
 877         struct snd_card *card = mixer->card;
 878         int err;
 879
 880         scoped_guard(rwsem_read, &card->controls_rwsem) {
 881                 kcontrol = snd_mixer_oss_test_id(mixer, name, index);
 882                 if (kcontrol == NULL)
 883                         return 0;
 884                 info = kmalloc(sizeof(*info), GFP_KERNEL);
 885                 if (!info)
 886                         return -ENOMEM;
 887                 err = kcontrol->info(kcontrol, info);
 888                 if (err < 0)
 889                         return err;
 890                 slot->numid[item] = kcontrol->id.numid;
 891         }
 892         if (info->count > slot->channels)
 893                 slot->channels = info->count;
 894         slot->present |= 1 << item;
 895         return 0;
 896 }
 897
 898 static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
 899 {
 900         struct slot *p = chn->private_data;
 901         if (p) {
 902                 if (p->allocated && p->assigned) {
 903                         kfree(p->assigned->name);
 904                         kfree(p->assigned);
 905                 }
 906                 kfree(p);
 907         }
 908 }
 909
 910 static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
 911 {
 912         int idx = rslot->number; /* remember this */
 913         if (rslot->private_free)
 914                 rslot->private_free(rslot);
 915         memset(rslot, 0, sizeof(*rslot));
 916         rslot->number = idx;
 917 }
 918
 919 /* In a separate function to keep gcc 3.2 happy - do NOT merge this in
 920    snd_mixer_oss_build_input! */
 921 static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
 922                                         const struct snd_mixer_oss_assign_table *ptr,
 923                                         struct slot *slot)
 924 {
 925         char str[64];
 926         int err;
 927
 928         err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
 929                                        SNDRV_MIXER_OSS_ITEM_GLOBAL);
 930         if (err)
 931                 return err;
 932         sprintf(str, "%s Switch", ptr->name);
 933         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 934                                        SNDRV_MIXER_OSS_ITEM_GSWITCH);
 935         if (err)
 936                 return err;
 937         sprintf(str, "%s Route", ptr->name);
 938         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 939                                        SNDRV_MIXER_OSS_ITEM_GROUTE);
 940         if (err)
 941                 return err;
 942         sprintf(str, "%s Volume", ptr->name);
 943         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 944                                        SNDRV_MIXER_OSS_ITEM_GVOLUME);
 945         if (err)
 946                 return err;
 947         sprintf(str, "%s Playback Switch", ptr->name);
 948         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 949                                        SNDRV_MIXER_OSS_ITEM_PSWITCH);
 950         if (err)
 951                 return err;
 952         sprintf(str, "%s Playback Route", ptr->name);
 953         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 954                                        SNDRV_MIXER_OSS_ITEM_PROUTE);
 955         if (err)
 956                 return err;
 957         sprintf(str, "%s Playback Volume", ptr->name);
 958         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 959                                        SNDRV_MIXER_OSS_ITEM_PVOLUME);
 960         if (err)
 961                 return err;
 962         sprintf(str, "%s Capture Switch", ptr->name);
 963         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 964                                        SNDRV_MIXER_OSS_ITEM_CSWITCH);
 965         if (err)
 966                 return err;
 967         sprintf(str, "%s Capture Route", ptr->name);
 968         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 969                                        SNDRV_MIXER_OSS_ITEM_CROUTE);
 970         if (err)
 971                 return err;
 972         sprintf(str, "%s Capture Volume", ptr->name);
 973         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 974                                        SNDRV_MIXER_OSS_ITEM_CVOLUME);
 975         if (err)
 976                 return err;
 977
 978         return 0;
 979 }
 980
 981 /*
 982  * build an OSS mixer element.
 983  * ptr_allocated means the entry is dynamically allocated (change via proc file).
 984  * when replace_old = 1, the old entry is replaced with the new one.
 985  */
 986 static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
 987                                      const struct snd_mixer_oss_assign_table *ptr,
 988                                      int ptr_allocated, int replace_old)
 989 {
 990         struct slot slot;
 991         struct slot *pslot;
 992         struct snd_kcontrol *kctl;
 993         struct snd_mixer_oss_slot *rslot;
 994         char str[64];
 995
 996         /* check if already assigned */
 997         if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
 998                 return 0;
 999
1000         memset(&slot, 0, sizeof(slot));
1001         memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1002         if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1003                 return 0;
1004         guard(rwsem_read)(&mixer->card->controls_rwsem);
1005         kctl = NULL;
1006         if (!ptr->index)
1007                 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
1008         if (kctl) {
1009                 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
1010
1011                 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1012                 if (!uinfo)
1013                         return -ENOMEM;
1014
1015                 if (kctl->info(kctl, uinfo))
1016                         return 0;
1017                 strcpy(str, ptr->name);
1018                 if (!strcmp(str, "Master"))
1019                         strcpy(str, "Mix");
1020                 if (!strcmp(str, "Master Mono"))
1021                         strcpy(str, "Mix Mono");
1022                 slot.capture_item = 0;
1023                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1024                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1025                 } else {
1026                         for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1027                                 uinfo->value.enumerated.item = slot.capture_item;
1028                                 if (kctl->info(kctl, uinfo))
1029                                         return 0;
1030                                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1031                                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1032                                         break;
1033                                 }
1034                         }
1035                 }
1036         }
1037         if (slot.present != 0) {
1038                 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1039                 if (! pslot)
1040                         return -ENOMEM;
1041                 *pslot = slot;
1042                 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1043                 pslot->assigned = ptr;
1044                 pslot->allocated = ptr_allocated;
1045                 rslot = &mixer->slots[ptr->oss_id];
1046                 mixer_slot_clear(rslot);
1047                 rslot->stereo = slot.channels > 1 ? 1 : 0;
1048                 rslot->get_volume = snd_mixer_oss_get_volume1;
1049                 rslot->put_volume = snd_mixer_oss_put_volume1;
1050                 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1051                 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1052                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1053                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1054                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1055                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1056                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1057                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1058                         mixer->mask_recsrc |= 1 << ptr->oss_id;
1059                 }
1060                 rslot->private_data = pslot;
1061                 rslot->private_free = snd_mixer_oss_slot_free;
1062                 return 1;
1063         }
1064         return 0;
1065 }
1066
1067 #ifdef CONFIG_SND_PROC_FS
1068 /*
1069  */
1070 #define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1071 static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1072         MIXER_VOL(VOLUME),
1073         MIXER_VOL(BASS),
1074         MIXER_VOL(TREBLE),
1075         MIXER_VOL(SYNTH),
1076         MIXER_VOL(PCM),
1077         MIXER_VOL(SPEAKER),
1078         MIXER_VOL(LINE),
1079         MIXER_VOL(MIC),
1080         MIXER_VOL(CD),
1081         MIXER_VOL(IMIX),
1082         MIXER_VOL(ALTPCM),
1083         MIXER_VOL(RECLEV),
1084         MIXER_VOL(IGAIN),
1085         MIXER_VOL(OGAIN),
1086         MIXER_VOL(LINE1),
1087         MIXER_VOL(LINE2),
1088         MIXER_VOL(LINE3),
1089         MIXER_VOL(DIGITAL1),
1090         MIXER_VOL(DIGITAL2),
1091         MIXER_VOL(DIGITAL3),
1092         MIXER_VOL(PHONEIN),
1093         MIXER_VOL(PHONEOUT),
1094         MIXER_VOL(VIDEO),
1095         MIXER_VOL(RADIO),
1096         MIXER_VOL(MONITOR),
1097 };
1098
1099 /*
1100  *  /proc interface
1101  */
1102
1103 static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1104                                     struct snd_info_buffer *buffer)
1105 {
1106         struct snd_mixer_oss *mixer = entry->private_data;
1107         int i;
1108
1109         guard(mutex)(&mixer->reg_mutex);
1110         for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1111                 struct slot *p;
1112
1113                 if (! oss_mixer_names[i])
1114                         continue;
1115                 p = (struct slot *)mixer->slots[i].private_data;
1116                 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1117                 if (p && p->assigned)
1118                         snd_iprintf(buffer, "\"%s\" %d\n",
1119                                     p->assigned->name,
1120                                     p->assigned->index);
1121                 else
1122                         snd_iprintf(buffer, "\"\" 0\n");
1123         }
1124 }
1125
1126 static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1127                                      struct snd_info_buffer *buffer)
1128 {
1129         struct snd_mixer_oss *mixer = entry->private_data;
1130         char line[128], str[32], idxstr[16];
1131         const char *cptr;
1132         unsigned int idx;
1133         int ch;
1134         struct snd_mixer_oss_assign_table *tbl;
1135         struct slot *slot;
1136
1137         while (!snd_info_get_line(buffer, line, sizeof(line))) {
1138                 cptr = snd_info_get_str(str, line, sizeof(str));
1139                 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1140                         if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1141                                 break;
1142                 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1143                         pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
1144                                str);
1145                         continue;
1146                 }
1147                 cptr = snd_info_get_str(str, cptr, sizeof(str));
1148                 if (! *str) {
1149                         /* remove the entry */
1150                         scoped_guard(mutex, &mixer->reg_mutex)
1151                                 mixer_slot_clear(&mixer->slots[ch]);
1152                         continue;
1153                 }
1154                 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1155                 idx = simple_strtoul(idxstr, NULL, 10);
1156                 if (idx >= 0x4000) { /* too big */
1157                         pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
1158                         continue;
1159                 }
1160                 scoped_guard(mutex, &mixer->reg_mutex) {
1161                         slot = (struct slot *)mixer->slots[ch].private_data;
1162                         if (slot && slot->assigned &&
1163                             slot->assigned->index == idx && !strcmp(slot->assigned->name, str))
1164                                 /* not changed */
1165                                 break;
1166                         tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1167                         if (!tbl)
1168                                 break;
1169                         tbl->oss_id = ch;
1170                         tbl->name = kstrdup(str, GFP_KERNEL);
1171                         if (!tbl->name) {
1172                                 kfree(tbl);
1173                                 break;
1174                         }
1175                         tbl->index = idx;
1176                         if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1177                                 kfree(tbl->name);
1178                                 kfree(tbl);
1179                         }
1180                 }
1181         }
1182 }
1183
1184 static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1185 {
1186         struct snd_info_entry *entry;
1187
1188         entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1189                                            mixer->card->proc_root);
1190         if (! entry)
1191                 return;
1192         entry->content = SNDRV_INFO_CONTENT_TEXT;
1193         entry->mode = S_IFREG | 0644;
1194         entry->c.text.read = snd_mixer_oss_proc_read;
1195         entry->c.text.write = snd_mixer_oss_proc_write;
1196         entry->private_data = mixer;
1197         if (snd_info_register(entry) < 0) {
1198                 snd_info_free_entry(entry);
1199                 entry = NULL;
1200         }
1201         mixer->proc_entry = entry;
1202 }
1203
1204 static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1205 {
1206         snd_info_free_entry(mixer->proc_entry);
1207         mixer->proc_entry = NULL;
1208 }
1209 #else /* !CONFIG_SND_PROC_FS */
1210 #define snd_mixer_oss_proc_init(mix)
1211 #define snd_mixer_oss_proc_done(mix)
1212 #endif /* CONFIG_SND_PROC_FS */
1213
1214 static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1215 {
1216         static const struct snd_mixer_oss_assign_table table[] = {
1217                 { SOUND_MIXER_VOLUME,   "Master",               0 },
1218                 { SOUND_MIXER_VOLUME,   "Front",                0 }, /* fallback */
1219                 { SOUND_MIXER_BASS,     "Tone Control - Bass",  0 },
1220                 { SOUND_MIXER_TREBLE,   "Tone Control - Treble", 0 },
1221                 { SOUND_MIXER_SYNTH,    "Synth",                0 },
1222                 { SOUND_MIXER_SYNTH,    "FM",                   0 }, /* fallback */
1223                 { SOUND_MIXER_SYNTH,    "Music",                0 }, /* fallback */
1224                 { SOUND_MIXER_PCM,      "PCM",                  0 },
1225                 { SOUND_MIXER_SPEAKER,  "Beep",                 0 },
1226                 { SOUND_MIXER_SPEAKER,  "PC Speaker",           0 }, /* fallback */
1227                 { SOUND_MIXER_SPEAKER,  "Speaker",              0 }, /* fallback */
1228                 { SOUND_MIXER_LINE,     "Line",                 0 },
1229                 { SOUND_MIXER_MIC,      "Mic",                  0 },
1230                 { SOUND_MIXER_CD,       "CD",                   0 },
1231                 { SOUND_MIXER_IMIX,     "Monitor Mix",          0 },
1232                 { SOUND_MIXER_ALTPCM,   "PCM",                  1 },
1233                 { SOUND_MIXER_ALTPCM,   "Headphone",            0 }, /* fallback */
1234                 { SOUND_MIXER_ALTPCM,   "Wave",                 0 }, /* fallback */
1235                 { SOUND_MIXER_RECLEV,   "-- nothing --",        0 },
1236                 { SOUND_MIXER_IGAIN,    "Capture",              0 },
1237                 { SOUND_MIXER_OGAIN,    "Playback",             0 },
1238                 { SOUND_MIXER_LINE1,    "Aux",                  0 },
1239                 { SOUND_MIXER_LINE2,    "Aux",                  1 },
1240                 { SOUND_MIXER_LINE3,    "Aux",                  2 },
1241                 { SOUND_MIXER_DIGITAL1, "Digital",              0 },
1242                 { SOUND_MIXER_DIGITAL1, "IEC958",               0 }, /* fallback */
1243                 { SOUND_MIXER_DIGITAL1, "IEC958 Optical",       0 }, /* fallback */
1244                 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial",       0 }, /* fallback */
1245                 { SOUND_MIXER_DIGITAL2, "Digital",              1 },
1246                 { SOUND_MIXER_DIGITAL3, "Digital",              2 },
1247                 { SOUND_MIXER_PHONEIN,  "Phone",                0 },
1248                 { SOUND_MIXER_PHONEOUT, "Master Mono",          0 },
1249                 { SOUND_MIXER_PHONEOUT, "Speaker",              0 }, /*fallback*/
1250                 { SOUND_MIXER_PHONEOUT, "Mono",                 0 }, /*fallback*/
1251                 { SOUND_MIXER_PHONEOUT, "Phone",                0 }, /* fallback */
1252                 { SOUND_MIXER_VIDEO,    "Video",                0 },
1253                 { SOUND_MIXER_RADIO,    "Radio",                0 },
1254                 { SOUND_MIXER_MONITOR,  "Monitor",              0 }
1255         };
1256         unsigned int idx;
1257
1258         for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1259                 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1260         if (mixer->mask_recsrc) {
1261                 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1262                 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1263         }
1264 }
1265
1266 /*
1267  *
1268  */
1269
1270 static int snd_mixer_oss_free1(void *private)
1271 {
1272         struct snd_mixer_oss *mixer = private;
1273         struct snd_card *card;
1274         int idx;
1275
1276         if (!mixer)
1277                 return 0;
1278         card = mixer->card;
1279         if (snd_BUG_ON(mixer != card->mixer_oss))
1280                 return -ENXIO;
1281         card->mixer_oss = NULL;
1282         for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1283                 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1284                 if (chn->private_free)
1285                         chn->private_free(chn);
1286         }
1287         kfree(mixer);
1288         return 0;
1289 }
1290
1291 static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1292 {
1293         struct snd_mixer_oss *mixer;
1294
1295         if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1296                 int idx, err;
1297
1298                 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1299                 if (mixer == NULL)
1300                         return -ENOMEM;
1301                 mutex_init(&mixer->reg_mutex);
1302                 err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1303                                               card, 0,
1304                                               &snd_mixer_oss_f_ops, card);
1305                 if (err < 0) {
1306                         dev_err(card->dev,
1307                                 "unable to register OSS mixer device %i:%i\n",
1308                                 card->number, 0);
1309                         kfree(mixer);
1310                         return err;
1311                 }
1312                 mixer->oss_dev_alloc = 1;
1313                 mixer->card = card;
1314                 if (*card->mixername)
1315                         strscpy(mixer->name, card->mixername, sizeof(mixer->name));
1316                 else
1317                         snprintf(mixer->name, sizeof(mixer->name),
1318                                  "mixer%i", card->number);
1319 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1320                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1321                                       card->number,
1322                                       mixer->name);
1323 #endif
1324                 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1325                         mixer->slots[idx].number = idx;
1326                 card->mixer_oss = mixer;
1327                 snd_mixer_oss_build(mixer);
1328                 snd_mixer_oss_proc_init(mixer);
1329         } else {
1330                 mixer = card->mixer_oss;
1331                 if (mixer == NULL)
1332                         return 0;
1333                 if (mixer->oss_dev_alloc) {
1334 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1335                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1336 #endif
1337                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1338                         mixer->oss_dev_alloc = 0;
1339                 }
1340                 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1341                         return 0;
1342                 snd_mixer_oss_proc_done(mixer);
1343                 return snd_mixer_oss_free1(mixer);
1344         }
1345         return 0;
1346 }
1347
1348 static int __init alsa_mixer_oss_init(void)
1349 {
1350         struct snd_card *card;
1351         int idx;
1352
1353         snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1354         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1355                 card = snd_card_ref(idx);
1356                 if (card) {
1357                         snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
1358                         snd_card_unref(card);
1359                 }
1360         }
1361         return 0;
1362 }
1363
1364 static void __exit alsa_mixer_oss_exit(void)
1365 {
1366         struct snd_card *card;
1367         int idx;
1368
1369         snd_mixer_oss_notify_callback = NULL;
1370         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1371                 card = snd_card_ref(idx);
1372                 if (card) {
1373                         snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
1374                         snd_card_unref(card);
1375                 }
1376         }
1377 }
1378
1379 module_init(alsa_mixer_oss_init)
1380 module_exit(alsa_mixer_oss_exit)