sound/core/oss/mixer_oss.c

   1 /*
   2  *  OSS emulation layer for the mixer interface
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/init.h>
  23 #include <linux/slab.h>
  24 #include <linux/time.h>
  25 #include <linux/string.h>
  26 #include <linux/module.h>
  27 #include <sound/core.h>
  28 #include <sound/minors.h>
  29 #include <sound/control.h>
  30 #include <sound/info.h>
  31 #include <sound/mixer_oss.h>
  32 #include <linux/soundcard.h>
  33
  34 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  35
  36 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  37 MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
  38 MODULE_LICENSE("GPL");
  39 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
  40
  41 static int snd_mixer_oss_open(struct inode *inode, struct file *file)
  42 {
  43         struct snd_card *card;
  44         struct snd_mixer_oss_file *fmixer;
  45         int err;
  46
  47         err = nonseekable_open(inode, file);
  48         if (err < 0)
  49                 return err;
  50
  51         card = snd_lookup_oss_minor_data(iminor(inode),
  52                                          SNDRV_OSS_DEVICE_TYPE_MIXER);
  53         if (card == NULL)
  54                 return -ENODEV;
  55         if (card->mixer_oss == NULL) {
  56                 snd_card_unref(card);
  57                 return -ENODEV;
  58         }
  59         err = snd_card_file_add(card, file);
  60         if (err < 0) {
  61                 snd_card_unref(card);
  62                 return err;
  63         }
  64         fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL);
  65         if (fmixer == NULL) {
  66                 snd_card_file_remove(card, file);
  67                 snd_card_unref(card);
  68                 return -ENOMEM;
  69         }
  70         fmixer->card = card;
  71         fmixer->mixer = card->mixer_oss;
  72         file->private_data = fmixer;
  73         if (!try_module_get(card->module)) {
  74                 kfree(fmixer);
  75                 snd_card_file_remove(card, file);
  76                 snd_card_unref(card);
  77                 return -EFAULT;
  78         }
  79         snd_card_unref(card);
  80         return 0;
  81 }
  82
  83 static int snd_mixer_oss_release(struct inode *inode, struct file *file)
  84 {
  85         struct snd_mixer_oss_file *fmixer;
  86
  87         if (file->private_data) {
  88                 fmixer = file->private_data;
  89                 module_put(fmixer->card->module);
  90                 snd_card_file_remove(fmixer->card, file);
  91                 kfree(fmixer);
  92         }
  93         return 0;
  94 }
  95
  96 static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer,
  97                               mixer_info __user *_info)
  98 {
  99         struct snd_card *card = fmixer->card;
 100         struct snd_mixer_oss *mixer = fmixer->mixer;
 101         struct mixer_info info;
 102
 103         memset(&info, 0, sizeof(info));
 104         strlcpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
 105         strlcpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
 106         info.modify_counter = card->mixer_oss_change_count;
 107         if (copy_to_user(_info, &info, sizeof(info)))
 108                 return -EFAULT;
 109         return 0;
 110 }
 111
 112 static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer,
 113                                        _old_mixer_info __user *_info)
 114 {
 115         struct snd_card *card = fmixer->card;
 116         struct snd_mixer_oss *mixer = fmixer->mixer;
 117         _old_mixer_info info;
 118
 119         memset(&info, 0, sizeof(info));
 120         strlcpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
 121         strlcpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
 122         if (copy_to_user(_info, &info, sizeof(info)))
 123                 return -EFAULT;
 124         return 0;
 125 }
 126
 127 static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer)
 128 {
 129         struct snd_mixer_oss *mixer = fmixer->mixer;
 130         int result = 0;
 131
 132         if (mixer == NULL)
 133                 return -EIO;
 134         if (mixer->get_recsrc && mixer->put_recsrc)
 135                 result |= SOUND_CAP_EXCL_INPUT;
 136         return result;
 137 }
 138
 139 static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer)
 140 {
 141         struct snd_mixer_oss *mixer = fmixer->mixer;
 142         struct snd_mixer_oss_slot *pslot;
 143         int result = 0, chn;
 144
 145         if (mixer == NULL)
 146                 return -EIO;
 147         mutex_lock(&mixer->reg_mutex);
 148         for (chn = 0; chn < 31; chn++) {
 149                 pslot = &mixer->slots[chn];
 150                 if (pslot->put_volume || pslot->put_recsrc)
 151                         result |= 1 << chn;
 152         }
 153         mutex_unlock(&mixer->reg_mutex);
 154         return result;
 155 }
 156
 157 static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
 158 {
 159         struct snd_mixer_oss *mixer = fmixer->mixer;
 160         struct snd_mixer_oss_slot *pslot;
 161         int result = 0, chn;
 162
 163         if (mixer == NULL)
 164                 return -EIO;
 165         mutex_lock(&mixer->reg_mutex);
 166         for (chn = 0; chn < 31; chn++) {
 167                 pslot = &mixer->slots[chn];
 168                 if (pslot->put_volume && pslot->stereo)
 169                         result |= 1 << chn;
 170         }
 171         mutex_unlock(&mixer->reg_mutex);
 172         return result;
 173 }
 174
 175 static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
 176 {
 177         struct snd_mixer_oss *mixer = fmixer->mixer;
 178         int result = 0;
 179
 180         if (mixer == NULL)
 181                 return -EIO;
 182         mutex_lock(&mixer->reg_mutex);
 183         if (mixer->put_recsrc && mixer->get_recsrc) {   /* exclusive */
 184                 result = mixer->mask_recsrc;
 185         } else {
 186                 struct snd_mixer_oss_slot *pslot;
 187                 int chn;
 188                 for (chn = 0; chn < 31; chn++) {
 189                         pslot = &mixer->slots[chn];
 190                         if (pslot->put_recsrc)
 191                                 result |= 1 << chn;
 192                 }
 193         }
 194         mutex_unlock(&mixer->reg_mutex);
 195         return result;
 196 }
 197
 198 static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
 199 {
 200         struct snd_mixer_oss *mixer = fmixer->mixer;
 201         int result = 0;
 202
 203         if (mixer == NULL)
 204                 return -EIO;
 205         mutex_lock(&mixer->reg_mutex);
 206         if (mixer->put_recsrc && mixer->get_recsrc) {   /* exclusive */
 207                 unsigned int index;
 208                 result = mixer->get_recsrc(fmixer, &index);
 209                 if (result < 0)
 210                         goto unlock;
 211                 result = 1 << index;
 212         } else {
 213                 struct snd_mixer_oss_slot *pslot;
 214                 int chn;
 215                 for (chn = 0; chn < 31; chn++) {
 216                         pslot = &mixer->slots[chn];
 217                         if (pslot->get_recsrc) {
 218                                 int active = 0;
 219                                 pslot->get_recsrc(fmixer, pslot, &active);
 220                                 if (active)
 221                                         result |= 1 << chn;
 222                         }
 223                 }
 224         }
 225         mixer->oss_recsrc = result;
 226  unlock:
 227         mutex_unlock(&mixer->reg_mutex);
 228         return result;
 229 }
 230
 231 static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
 232 {
 233         struct snd_mixer_oss *mixer = fmixer->mixer;
 234         struct snd_mixer_oss_slot *pslot;
 235         int chn, active;
 236         unsigned int index;
 237         int result = 0;
 238
 239         if (mixer == NULL)
 240                 return -EIO;
 241         mutex_lock(&mixer->reg_mutex);
 242         if (mixer->get_recsrc && mixer->put_recsrc) {   /* exclusive input */
 243                 if (recsrc & ~mixer->oss_recsrc)
 244                         recsrc &= ~mixer->oss_recsrc;
 245                 mixer->put_recsrc(fmixer, ffz(~recsrc));
 246                 mixer->get_recsrc(fmixer, &index);
 247                 result = 1 << index;
 248         }
 249         for (chn = 0; chn < 31; chn++) {
 250                 pslot = &mixer->slots[chn];
 251                 if (pslot->put_recsrc) {
 252                         active = (recsrc & (1 << chn)) ? 1 : 0;
 253                         pslot->put_recsrc(fmixer, pslot, active);
 254                 }
 255         }
 256         if (! result) {
 257                 for (chn = 0; chn < 31; chn++) {
 258                         pslot = &mixer->slots[chn];
 259                         if (pslot->get_recsrc) {
 260                                 active = 0;
 261                                 pslot->get_recsrc(fmixer, pslot, &active);
 262                                 if (active)
 263                                         result |= 1 << chn;
 264                         }
 265                 }
 266         }
 267         mutex_unlock(&mixer->reg_mutex);
 268         return result;
 269 }
 270
 271 static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
 272 {
 273         struct snd_mixer_oss *mixer = fmixer->mixer;
 274         struct snd_mixer_oss_slot *pslot;
 275         int result = 0, left, right;
 276
 277         if (mixer == NULL || slot > 30)
 278                 return -EIO;
 279         mutex_lock(&mixer->reg_mutex);
 280         pslot = &mixer->slots[slot];
 281         left = pslot->volume[0];
 282         right = pslot->volume[1];
 283         if (pslot->get_volume)
 284                 result = pslot->get_volume(fmixer, pslot, &left, &right);
 285         if (!pslot->stereo)
 286                 right = left;
 287         if (snd_BUG_ON(left < 0 || left > 100)) {
 288                 result = -EIO;
 289                 goto unlock;
 290         }
 291         if (snd_BUG_ON(right < 0 || right > 100)) {
 292                 result = -EIO;
 293                 goto unlock;
 294         }
 295         if (result >= 0) {
 296                 pslot->volume[0] = left;
 297                 pslot->volume[1] = right;
 298                 result = (left & 0xff) | ((right & 0xff) << 8);
 299         }
 300  unlock:
 301         mutex_unlock(&mixer->reg_mutex);
 302         return result;
 303 }
 304
 305 static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
 306                                     int slot, int volume)
 307 {
 308         struct snd_mixer_oss *mixer = fmixer->mixer;
 309         struct snd_mixer_oss_slot *pslot;
 310         int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
 311
 312         if (mixer == NULL || slot > 30)
 313                 return -EIO;
 314         mutex_lock(&mixer->reg_mutex);
 315         pslot = &mixer->slots[slot];
 316         if (left > 100)
 317                 left = 100;
 318         if (right > 100)
 319                 right = 100;
 320         if (!pslot->stereo)
 321                 right = left;
 322         if (pslot->put_volume)
 323                 result = pslot->put_volume(fmixer, pslot, left, right);
 324         if (result < 0)
 325                 goto unlock;
 326         pslot->volume[0] = left;
 327         pslot->volume[1] = right;
 328         result = (left & 0xff) | ((right & 0xff) << 8);
 329  unlock:
 330         mutex_unlock(&mixer->reg_mutex);
 331         return result;
 332 }
 333
 334 static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
 335 {
 336         void __user *argp = (void __user *)arg;
 337         int __user *p = argp;
 338         int tmp;
 339
 340         if (snd_BUG_ON(!fmixer))
 341                 return -ENXIO;
 342         if (((cmd >> 8) & 0xff) == 'M') {
 343                 switch (cmd) {
 344                 case SOUND_MIXER_INFO:
 345                         return snd_mixer_oss_info(fmixer, argp);
 346                 case SOUND_OLD_MIXER_INFO:
 347                         return snd_mixer_oss_info_obsolete(fmixer, argp);
 348                 case SOUND_MIXER_WRITE_RECSRC:
 349                         if (get_user(tmp, p))
 350                                 return -EFAULT;
 351                         tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
 352                         if (tmp < 0)
 353                                 return tmp;
 354                         return put_user(tmp, p);
 355                 case OSS_GETVERSION:
 356                         return put_user(SNDRV_OSS_VERSION, p);
 357                 case OSS_ALSAEMULVER:
 358                         return put_user(1, p);
 359                 case SOUND_MIXER_READ_DEVMASK:
 360                         tmp = snd_mixer_oss_devmask(fmixer);
 361                         if (tmp < 0)
 362                                 return tmp;
 363                         return put_user(tmp, p);
 364                 case SOUND_MIXER_READ_STEREODEVS:
 365                         tmp = snd_mixer_oss_stereodevs(fmixer);
 366                         if (tmp < 0)
 367                                 return tmp;
 368                         return put_user(tmp, p);
 369                 case SOUND_MIXER_READ_RECMASK:
 370                         tmp = snd_mixer_oss_recmask(fmixer);
 371                         if (tmp < 0)
 372                                 return tmp;
 373                         return put_user(tmp, p);
 374                 case SOUND_MIXER_READ_CAPS:
 375                         tmp = snd_mixer_oss_caps(fmixer);
 376                         if (tmp < 0)
 377                                 return tmp;
 378                         return put_user(tmp, p);
 379                 case SOUND_MIXER_READ_RECSRC:
 380                         tmp = snd_mixer_oss_get_recsrc(fmixer);
 381                         if (tmp < 0)
 382                                 return tmp;
 383                         return put_user(tmp, p);
 384                 }
 385         }
 386         if (cmd & SIOC_IN) {
 387                 if (get_user(tmp, p))
 388                         return -EFAULT;
 389                 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
 390                 if (tmp < 0)
 391                         return tmp;
 392                 return put_user(tmp, p);
 393         } else if (cmd & SIOC_OUT) {
 394                 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
 395                 if (tmp < 0)
 396                         return tmp;
 397                 return put_user(tmp, p);
 398         }
 399         return -ENXIO;
 400 }
 401
 402 static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 403 {
 404         return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
 405 }
 406
 407 int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
 408 {
 409         struct snd_mixer_oss_file fmixer;
 410
 411         if (snd_BUG_ON(!card))
 412                 return -ENXIO;
 413         if (card->mixer_oss == NULL)
 414                 return -ENXIO;
 415         memset(&fmixer, 0, sizeof(fmixer));
 416         fmixer.card = card;
 417         fmixer.mixer = card->mixer_oss;
 418         return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
 419 }
 420
 421 #ifdef CONFIG_COMPAT
 422 /* all compatible */
 423 #define snd_mixer_oss_ioctl_compat      snd_mixer_oss_ioctl
 424 #else
 425 #define snd_mixer_oss_ioctl_compat      NULL
 426 #endif
 427
 428 /*
 429  *  REGISTRATION PART
 430  */
 431
 432 static const struct file_operations snd_mixer_oss_f_ops =
 433 {
 434         .owner =        THIS_MODULE,
 435         .open =         snd_mixer_oss_open,
 436         .release =      snd_mixer_oss_release,
 437         .llseek =       no_llseek,
 438         .unlocked_ioctl =       snd_mixer_oss_ioctl,
 439         .compat_ioctl = snd_mixer_oss_ioctl_compat,
 440 };
 441
 442 /*
 443  *  utilities
 444  */
 445
 446 static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
 447 {
 448         long orange = omax - omin, nrange = nmax - nmin;
 449
 450         if (orange == 0)
 451                 return 0;
 452         return ((nrange * (val - omin)) + (orange / 2)) / orange + nmin;
 453 }
 454
 455 /* convert from alsa native to oss values (0-100) */
 456 static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
 457 {
 458         if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
 459                 return *old;
 460         return snd_mixer_oss_conv(val, min, max, 0, 100);
 461 }
 462
 463 /* convert from oss to alsa native values */
 464 static long snd_mixer_oss_conv2(long val, long min, long max)
 465 {
 466         return snd_mixer_oss_conv(val, 0, 100, min, max);
 467 }
 468
 469 #if 0
 470 static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
 471 {
 472         struct snd_mixer_oss *mixer = card->mixer_oss;
 473         if (mixer)
 474                 mixer->mask_recsrc |= 1 << slot;
 475 }
 476
 477 static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
 478 {
 479         struct snd_mixer_oss *mixer = card->mixer_oss;
 480         if (mixer && (mixer->mask_recsrc & (1 << slot)))
 481                 return 1;
 482         return 0;
 483 }
 484 #endif
 485
 486 #define SNDRV_MIXER_OSS_SIGNATURE               0x65999250
 487
 488 #define SNDRV_MIXER_OSS_ITEM_GLOBAL     0
 489 #define SNDRV_MIXER_OSS_ITEM_GSWITCH    1
 490 #define SNDRV_MIXER_OSS_ITEM_GROUTE     2
 491 #define SNDRV_MIXER_OSS_ITEM_GVOLUME    3
 492 #define SNDRV_MIXER_OSS_ITEM_PSWITCH    4
 493 #define SNDRV_MIXER_OSS_ITEM_PROUTE     5
 494 #define SNDRV_MIXER_OSS_ITEM_PVOLUME    6
 495 #define SNDRV_MIXER_OSS_ITEM_CSWITCH    7
 496 #define SNDRV_MIXER_OSS_ITEM_CROUTE     8
 497 #define SNDRV_MIXER_OSS_ITEM_CVOLUME    9
 498 #define SNDRV_MIXER_OSS_ITEM_CAPTURE    10
 499
 500 #define SNDRV_MIXER_OSS_ITEM_COUNT      11
 501
 502 #define SNDRV_MIXER_OSS_PRESENT_GLOBAL  (1<<0)
 503 #define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
 504 #define SNDRV_MIXER_OSS_PRESENT_GROUTE  (1<<2)
 505 #define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
 506 #define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
 507 #define SNDRV_MIXER_OSS_PRESENT_PROUTE  (1<<5)
 508 #define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
 509 #define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
 510 #define SNDRV_MIXER_OSS_PRESENT_CROUTE  (1<<8)
 511 #define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
 512 #define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
 513
 514 struct slot {
 515         unsigned int signature;
 516         unsigned int present;
 517         unsigned int channels;
 518         unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
 519         unsigned int capture_item;
 520         struct snd_mixer_oss_assign_table *assigned;
 521         unsigned int allocated: 1;
 522 };
 523
 524 #define ID_UNKNOWN      ((unsigned int)-1)
 525
 526 static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
 527 {
 528         struct snd_card *card = mixer->card;
 529         struct snd_ctl_elem_id id;
 530
 531         memset(&id, 0, sizeof(id));
 532         id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 533         strlcpy(id.name, name, sizeof(id.name));
 534         id.index = index;
 535         return snd_ctl_find_id(card, &id);
 536 }
 537
 538 static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
 539                                           struct snd_mixer_oss_slot *pslot,
 540                                           unsigned int numid,
 541                                           int *left, int *right)
 542 {
 543         struct snd_ctl_elem_info *uinfo;
 544         struct snd_ctl_elem_value *uctl;
 545         struct snd_kcontrol *kctl;
 546         struct snd_card *card = fmixer->card;
 547
 548         if (numid == ID_UNKNOWN)
 549                 return;
 550         down_read(&card->controls_rwsem);
 551         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
 552                 up_read(&card->controls_rwsem);
 553                 return;
 554         }
 555         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 556         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 557         if (uinfo == NULL || uctl == NULL)
 558                 goto __unalloc;
 559         if (kctl->info(kctl, uinfo))
 560                 goto __unalloc;
 561         if (kctl->get(kctl, uctl))
 562                 goto __unalloc;
 563         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
 564             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
 565                 goto __unalloc;
 566         *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
 567         if (uinfo->count > 1)
 568                 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
 569       __unalloc:
 570         up_read(&card->controls_rwsem);
 571         kfree(uctl);
 572         kfree(uinfo);
 573 }
 574
 575 static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
 576                                          struct snd_mixer_oss_slot *pslot,
 577                                          unsigned int numid,
 578                                          int *left, int *right,
 579                                          int route)
 580 {
 581         struct snd_ctl_elem_info *uinfo;
 582         struct snd_ctl_elem_value *uctl;
 583         struct snd_kcontrol *kctl;
 584         struct snd_card *card = fmixer->card;
 585
 586         if (numid == ID_UNKNOWN)
 587                 return;
 588         down_read(&card->controls_rwsem);
 589         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
 590                 up_read(&card->controls_rwsem);
 591                 return;
 592         }
 593         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 594         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 595         if (uinfo == NULL || uctl == NULL)
 596                 goto __unalloc;
 597         if (kctl->info(kctl, uinfo))
 598                 goto __unalloc;
 599         if (kctl->get(kctl, uctl))
 600                 goto __unalloc;
 601         if (!uctl->value.integer.value[0]) {
 602                 *left = 0;
 603                 if (uinfo->count == 1)
 604                         *right = 0;
 605         }
 606         if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
 607                 *right = 0;
 608       __unalloc:
 609         up_read(&card->controls_rwsem);
 610         kfree(uctl);
 611         kfree(uinfo);
 612 }
 613
 614 static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
 615                                      struct snd_mixer_oss_slot *pslot,
 616                                      int *left, int *right)
 617 {
 618         struct slot *slot = pslot->private_data;
 619
 620         *left = *right = 100;
 621         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
 622                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
 623         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
 624                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
 625         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
 626                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
 627         }
 628         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
 629                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 630         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
 631                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 632         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
 633                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 634         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
 635                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 636         }
 637         return 0;
 638 }
 639
 640 static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
 641                                           struct snd_mixer_oss_slot *pslot,
 642                                           unsigned int numid,
 643                                           int left, int right)
 644 {
 645         struct snd_ctl_elem_info *uinfo;
 646         struct snd_ctl_elem_value *uctl;
 647         struct snd_kcontrol *kctl;
 648         struct snd_card *card = fmixer->card;
 649         int res;
 650
 651         if (numid == ID_UNKNOWN)
 652                 return;
 653         down_read(&card->controls_rwsem);
 654         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
 655                 up_read(&card->controls_rwsem);
 656                 return;
 657         }
 658         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 659         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 660         if (uinfo == NULL || uctl == NULL)
 661                 goto __unalloc;
 662         if (kctl->info(kctl, uinfo))
 663                 goto __unalloc;
 664         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
 665             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
 666                 goto __unalloc;
 667         uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
 668         if (uinfo->count > 1)
 669                 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
 670         if ((res = kctl->put(kctl, uctl)) < 0)
 671                 goto __unalloc;
 672         if (res > 0)
 673                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 674       __unalloc:
 675         up_read(&card->controls_rwsem);
 676         kfree(uctl);
 677         kfree(uinfo);
 678 }
 679
 680 static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
 681                                          struct snd_mixer_oss_slot *pslot,
 682                                          unsigned int numid,
 683                                          int left, int right,
 684                                          int route)
 685 {
 686         struct snd_ctl_elem_info *uinfo;
 687         struct snd_ctl_elem_value *uctl;
 688         struct snd_kcontrol *kctl;
 689         struct snd_card *card = fmixer->card;
 690         int res;
 691
 692         if (numid == ID_UNKNOWN)
 693                 return;
 694         down_read(&card->controls_rwsem);
 695         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
 696                 up_read(&card->controls_rwsem);
 697                 return;
 698         }
 699         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 700         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 701         if (uinfo == NULL || uctl == NULL)
 702                 goto __unalloc;
 703         if (kctl->info(kctl, uinfo))
 704                 goto __unalloc;
 705         if (uinfo->count > 1) {
 706                 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
 707                 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
 708                 if (route) {
 709                         uctl->value.integer.value[1] =
 710                         uctl->value.integer.value[2] = 0;
 711                 }
 712         } else {
 713                 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
 714         }
 715         if ((res = kctl->put(kctl, uctl)) < 0)
 716                 goto __unalloc;
 717         if (res > 0)
 718                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 719       __unalloc:
 720         up_read(&card->controls_rwsem);
 721         kfree(uctl);
 722         kfree(uinfo);
 723 }
 724
 725 static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
 726                                      struct snd_mixer_oss_slot *pslot,
 727                                      int left, int right)
 728 {
 729         struct slot *slot = pslot->private_data;
 730
 731         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
 732                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
 733                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
 734                         snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
 735         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
 736                 snd_mixer_oss_put_volume1_vol(fmixer, pslot,
 737                         slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
 738         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
 739                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
 740         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
 741                 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
 742         }
 743         if (left || right) {
 744                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
 745                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 746                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
 747                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
 748                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
 749                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 750                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
 751                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 752                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
 753                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
 754                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
 755                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 756         } else {
 757                 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
 758                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
 759                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
 760                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
 761                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
 762                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
 763                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
 764                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
 765                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
 766                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
 767                 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
 768                         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
 769                 }
 770         }
 771         return 0;
 772 }
 773
 774 static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
 775                                         struct snd_mixer_oss_slot *pslot,
 776                                         int *active)
 777 {
 778         struct slot *slot = pslot->private_data;
 779         int left, right;
 780
 781         left = right = 1;
 782         snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
 783         *active = (left || right) ? 1 : 0;
 784         return 0;
 785 }
 786
 787 static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
 788                                            struct snd_mixer_oss_slot *pslot,
 789                                            int *active)
 790 {
 791         struct slot *slot = pslot->private_data;
 792         int left, right;
 793
 794         left = right = 1;
 795         snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
 796         *active = (left || right) ? 1 : 0;
 797         return 0;
 798 }
 799
 800 static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
 801                                         struct snd_mixer_oss_slot *pslot,
 802                                         int active)
 803 {
 804         struct slot *slot = pslot->private_data;
 805
 806         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
 807         return 0;
 808 }
 809
 810 static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
 811                                            struct snd_mixer_oss_slot *pslot,
 812                                            int active)
 813 {
 814         struct slot *slot = pslot->private_data;
 815
 816         snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
 817         return 0;
 818 }
 819
 820 static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
 821 {
 822         struct snd_card *card = fmixer->card;
 823         struct snd_mixer_oss *mixer = fmixer->mixer;
 824         struct snd_kcontrol *kctl;
 825         struct snd_mixer_oss_slot *pslot;
 826         struct slot *slot;
 827         struct snd_ctl_elem_info *uinfo;
 828         struct snd_ctl_elem_value *uctl;
 829         int err, idx;
 830
 831         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 832         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 833         if (uinfo == NULL || uctl == NULL) {
 834                 err = -ENOMEM;
 835                 goto __free_only;
 836         }
 837         down_read(&card->controls_rwsem);
 838         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
 839         if (! kctl) {
 840                 err = -ENOENT;
 841                 goto __unlock;
 842         }
 843         if ((err = kctl->info(kctl, uinfo)) < 0)
 844                 goto __unlock;
 845         if ((err = kctl->get(kctl, uctl)) < 0)
 846                 goto __unlock;
 847         for (idx = 0; idx < 32; idx++) {
 848                 if (!(mixer->mask_recsrc & (1 << idx)))
 849                         continue;
 850                 pslot = &mixer->slots[idx];
 851                 slot = pslot->private_data;
 852                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
 853                         continue;
 854                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
 855                         continue;
 856                 if (slot->capture_item == uctl->value.enumerated.item[0]) {
 857                         *active_index = idx;
 858                         break;
 859                 }
 860         }
 861         err = 0;
 862       __unlock:
 863         up_read(&card->controls_rwsem);
 864       __free_only:
 865         kfree(uctl);
 866         kfree(uinfo);
 867         return err;
 868 }
 869
 870 static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
 871 {
 872         struct snd_card *card = fmixer->card;
 873         struct snd_mixer_oss *mixer = fmixer->mixer;
 874         struct snd_kcontrol *kctl;
 875         struct snd_mixer_oss_slot *pslot;
 876         struct slot *slot = NULL;
 877         struct snd_ctl_elem_info *uinfo;
 878         struct snd_ctl_elem_value *uctl;
 879         int err;
 880         unsigned int idx;
 881
 882         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
 883         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 884         if (uinfo == NULL || uctl == NULL) {
 885                 err = -ENOMEM;
 886                 goto __free_only;
 887         }
 888         down_read(&card->controls_rwsem);
 889         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
 890         if (! kctl) {
 891                 err = -ENOENT;
 892                 goto __unlock;
 893         }
 894         if ((err = kctl->info(kctl, uinfo)) < 0)
 895                 goto __unlock;
 896         for (idx = 0; idx < 32; idx++) {
 897                 if (!(mixer->mask_recsrc & (1 << idx)))
 898                         continue;
 899                 pslot = &mixer->slots[idx];
 900                 slot = pslot->private_data;
 901                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
 902                         continue;
 903                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
 904                         continue;
 905                 if (idx == active_index)
 906                         break;
 907                 slot = NULL;
 908         }
 909         if (! slot)
 910                 goto __unlock;
 911         for (idx = 0; idx < uinfo->count; idx++)
 912                 uctl->value.enumerated.item[idx] = slot->capture_item;
 913         err = kctl->put(kctl, uctl);
 914         if (err > 0)
 915                 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 916         err = 0;
 917       __unlock:
 918         up_read(&card->controls_rwsem);
 919       __free_only:
 920         kfree(uctl);
 921         kfree(uinfo);
 922         return err;
 923 }
 924
 925 struct snd_mixer_oss_assign_table {
 926         int oss_id;
 927         const char *name;
 928         int index;
 929 };
 930
 931 static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
 932 {
 933         struct snd_ctl_elem_info *info;
 934         struct snd_kcontrol *kcontrol;
 935         struct snd_card *card = mixer->card;
 936         int err;
 937
 938         down_read(&card->controls_rwsem);
 939         kcontrol = snd_mixer_oss_test_id(mixer, name, index);
 940         if (kcontrol == NULL) {
 941                 up_read(&card->controls_rwsem);
 942                 return 0;
 943         }
 944         info = kmalloc(sizeof(*info), GFP_KERNEL);
 945         if (! info) {
 946                 up_read(&card->controls_rwsem);
 947                 return -ENOMEM;
 948         }
 949         if ((err = kcontrol->info(kcontrol, info)) < 0) {
 950                 up_read(&card->controls_rwsem);
 951                 kfree(info);
 952                 return err;
 953         }
 954         slot->numid[item] = kcontrol->id.numid;
 955         up_read(&card->controls_rwsem);
 956         if (info->count > slot->channels)
 957                 slot->channels = info->count;
 958         slot->present |= 1 << item;
 959         kfree(info);
 960         return 0;
 961 }
 962
 963 static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
 964 {
 965         struct slot *p = chn->private_data;
 966         if (p) {
 967                 if (p->allocated && p->assigned) {
 968                         kfree(p->assigned->name);
 969                         kfree(p->assigned);
 970                 }
 971                 kfree(p);
 972         }
 973 }
 974
 975 static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
 976 {
 977         int idx = rslot->number; /* remember this */
 978         if (rslot->private_free)
 979                 rslot->private_free(rslot);
 980         memset(rslot, 0, sizeof(*rslot));
 981         rslot->number = idx;
 982 }
 983
 984 /* In a separate function to keep gcc 3.2 happy - do NOT merge this in
 985    snd_mixer_oss_build_input! */
 986 static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
 987                                         struct snd_mixer_oss_assign_table *ptr,
 988                                         struct slot *slot)
 989 {
 990         char str[64];
 991         int err;
 992
 993         err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
 994                                        SNDRV_MIXER_OSS_ITEM_GLOBAL);
 995         if (err)
 996                 return err;
 997         sprintf(str, "%s Switch", ptr->name);
 998         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
 999                                        SNDRV_MIXER_OSS_ITEM_GSWITCH);
1000         if (err)
1001                 return err;
1002         sprintf(str, "%s Route", ptr->name);
1003         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1004                                        SNDRV_MIXER_OSS_ITEM_GROUTE);
1005         if (err)
1006                 return err;
1007         sprintf(str, "%s Volume", ptr->name);
1008         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1009                                        SNDRV_MIXER_OSS_ITEM_GVOLUME);
1010         if (err)
1011                 return err;
1012         sprintf(str, "%s Playback Switch", ptr->name);
1013         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1014                                        SNDRV_MIXER_OSS_ITEM_PSWITCH);
1015         if (err)
1016                 return err;
1017         sprintf(str, "%s Playback Route", ptr->name);
1018         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1019                                        SNDRV_MIXER_OSS_ITEM_PROUTE);
1020         if (err)
1021                 return err;
1022         sprintf(str, "%s Playback Volume", ptr->name);
1023         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1024                                        SNDRV_MIXER_OSS_ITEM_PVOLUME);
1025         if (err)
1026                 return err;
1027         sprintf(str, "%s Capture Switch", ptr->name);
1028         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1029                                        SNDRV_MIXER_OSS_ITEM_CSWITCH);
1030         if (err)
1031                 return err;
1032         sprintf(str, "%s Capture Route", ptr->name);
1033         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1034                                        SNDRV_MIXER_OSS_ITEM_CROUTE);
1035         if (err)
1036                 return err;
1037         sprintf(str, "%s Capture Volume", ptr->name);
1038         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1039                                        SNDRV_MIXER_OSS_ITEM_CVOLUME);
1040         if (err)
1041                 return err;
1042
1043         return 0;
1044 }
1045
1046 /*
1047  * build an OSS mixer element.
1048  * ptr_allocated means the entry is dynamically allocated (change via proc file).
1049  * when replace_old = 1, the old entry is replaced with the new one.
1050  */
1051 static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer, struct snd_mixer_oss_assign_table *ptr, int ptr_allocated, int replace_old)
1052 {
1053         struct slot slot;
1054         struct slot *pslot;
1055         struct snd_kcontrol *kctl;
1056         struct snd_mixer_oss_slot *rslot;
1057         char str[64];
1058
1059         /* check if already assigned */
1060         if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
1061                 return 0;
1062
1063         memset(&slot, 0, sizeof(slot));
1064         memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1065         if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1066                 return 0;
1067         down_read(&mixer->card->controls_rwsem);
1068         if (ptr->index == 0 && (kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0)) != NULL) {
1069                 struct snd_ctl_elem_info *uinfo;
1070
1071                 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1072                 if (! uinfo) {
1073                         up_read(&mixer->card->controls_rwsem);
1074                         return -ENOMEM;
1075                 }
1076
1077                 if (kctl->info(kctl, uinfo)) {
1078                         up_read(&mixer->card->controls_rwsem);
1079                         kfree(uinfo);
1080                         return 0;
1081                 }
1082                 strcpy(str, ptr->name);
1083                 if (!strcmp(str, "Master"))
1084                         strcpy(str, "Mix");
1085                 if (!strcmp(str, "Master Mono"))
1086                         strcpy(str, "Mix Mono");
1087                 slot.capture_item = 0;
1088                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1089                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1090                 } else {
1091                         for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1092                                 uinfo->value.enumerated.item = slot.capture_item;
1093                                 if (kctl->info(kctl, uinfo)) {
1094                                         up_read(&mixer->card->controls_rwsem);
1095                                         kfree(uinfo);
1096                                         return 0;
1097                                 }
1098                                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1099                                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1100                                         break;
1101                                 }
1102                         }
1103                 }
1104                 kfree(uinfo);
1105         }
1106         up_read(&mixer->card->controls_rwsem);
1107         if (slot.present != 0) {
1108                 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1109                 if (! pslot)
1110                         return -ENOMEM;
1111                 *pslot = slot;
1112                 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1113                 pslot->assigned = ptr;
1114                 pslot->allocated = ptr_allocated;
1115                 rslot = &mixer->slots[ptr->oss_id];
1116                 mixer_slot_clear(rslot);
1117                 rslot->stereo = slot.channels > 1 ? 1 : 0;
1118                 rslot->get_volume = snd_mixer_oss_get_volume1;
1119                 rslot->put_volume = snd_mixer_oss_put_volume1;
1120                 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1121                 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1122                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1123                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1124                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1125                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1126                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1127                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1128                         mixer->mask_recsrc |= 1 << ptr->oss_id;
1129                 }
1130                 rslot->private_data = pslot;
1131                 rslot->private_free = snd_mixer_oss_slot_free;
1132                 return 1;
1133         }
1134         return 0;
1135 }
1136
1137 #ifdef CONFIG_SND_PROC_FS
1138 /*
1139  */
1140 #define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1141 static char *oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1142         MIXER_VOL(VOLUME),
1143         MIXER_VOL(BASS),
1144         MIXER_VOL(TREBLE),
1145         MIXER_VOL(SYNTH),
1146         MIXER_VOL(PCM),
1147         MIXER_VOL(SPEAKER),
1148         MIXER_VOL(LINE),
1149         MIXER_VOL(MIC),
1150         MIXER_VOL(CD),
1151         MIXER_VOL(IMIX),
1152         MIXER_VOL(ALTPCM),
1153         MIXER_VOL(RECLEV),
1154         MIXER_VOL(IGAIN),
1155         MIXER_VOL(OGAIN),
1156         MIXER_VOL(LINE1),
1157         MIXER_VOL(LINE2),
1158         MIXER_VOL(LINE3),
1159         MIXER_VOL(DIGITAL1),
1160         MIXER_VOL(DIGITAL2),
1161         MIXER_VOL(DIGITAL3),
1162         MIXER_VOL(PHONEIN),
1163         MIXER_VOL(PHONEOUT),
1164         MIXER_VOL(VIDEO),
1165         MIXER_VOL(RADIO),
1166         MIXER_VOL(MONITOR),
1167 };
1168
1169 /*
1170  *  /proc interface
1171  */
1172
1173 static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1174                                     struct snd_info_buffer *buffer)
1175 {
1176         struct snd_mixer_oss *mixer = entry->private_data;
1177         int i;
1178
1179         mutex_lock(&mixer->reg_mutex);
1180         for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1181                 struct slot *p;
1182
1183                 if (! oss_mixer_names[i])
1184                         continue;
1185                 p = (struct slot *)mixer->slots[i].private_data;
1186                 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1187                 if (p && p->assigned)
1188                         snd_iprintf(buffer, "\"%s\" %d\n",
1189                                     p->assigned->name,
1190                                     p->assigned->index);
1191                 else
1192                         snd_iprintf(buffer, "\"\" 0\n");
1193         }
1194         mutex_unlock(&mixer->reg_mutex);
1195 }
1196
1197 static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1198                                      struct snd_info_buffer *buffer)
1199 {
1200         struct snd_mixer_oss *mixer = entry->private_data;
1201         char line[128], str[32], idxstr[16];
1202         const char *cptr;
1203         unsigned int idx;
1204         int ch;
1205         struct snd_mixer_oss_assign_table *tbl;
1206         struct slot *slot;
1207
1208         while (!snd_info_get_line(buffer, line, sizeof(line))) {
1209                 cptr = snd_info_get_str(str, line, sizeof(str));
1210                 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1211                         if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1212                                 break;
1213                 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1214                         pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
1215                                str);
1216                         continue;
1217                 }
1218                 cptr = snd_info_get_str(str, cptr, sizeof(str));
1219                 if (! *str) {
1220                         /* remove the entry */
1221                         mutex_lock(&mixer->reg_mutex);
1222                         mixer_slot_clear(&mixer->slots[ch]);
1223                         mutex_unlock(&mixer->reg_mutex);
1224                         continue;
1225                 }
1226                 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1227                 idx = simple_strtoul(idxstr, NULL, 10);
1228                 if (idx >= 0x4000) { /* too big */
1229                         pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
1230                         continue;
1231                 }
1232                 mutex_lock(&mixer->reg_mutex);
1233                 slot = (struct slot *)mixer->slots[ch].private_data;
1234                 if (slot && slot->assigned &&
1235                     slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
1236                         /* not changed */
1237                         goto __unlock;
1238                 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1239                 if (!tbl)
1240                         goto __unlock;
1241                 tbl->oss_id = ch;
1242                 tbl->name = kstrdup(str, GFP_KERNEL);
1243                 if (! tbl->name) {
1244                         kfree(tbl);
1245                         goto __unlock;
1246                 }
1247                 tbl->index = idx;
1248                 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1249                         kfree(tbl->name);
1250                         kfree(tbl);
1251                 }
1252         __unlock:
1253                 mutex_unlock(&mixer->reg_mutex);
1254         }
1255 }
1256
1257 static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1258 {
1259         struct snd_info_entry *entry;
1260
1261         entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1262                                            mixer->card->proc_root);
1263         if (! entry)
1264                 return;
1265         entry->content = SNDRV_INFO_CONTENT_TEXT;
1266         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
1267         entry->c.text.read = snd_mixer_oss_proc_read;
1268         entry->c.text.write = snd_mixer_oss_proc_write;
1269         entry->private_data = mixer;
1270         if (snd_info_register(entry) < 0) {
1271                 snd_info_free_entry(entry);
1272                 entry = NULL;
1273         }
1274         mixer->proc_entry = entry;
1275 }
1276
1277 static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1278 {
1279         snd_info_free_entry(mixer->proc_entry);
1280         mixer->proc_entry = NULL;
1281 }
1282 #else /* !CONFIG_SND_PROC_FS */
1283 #define snd_mixer_oss_proc_init(mix)
1284 #define snd_mixer_oss_proc_done(mix)
1285 #endif /* CONFIG_SND_PROC_FS */
1286
1287 static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1288 {
1289         static struct snd_mixer_oss_assign_table table[] = {
1290                 { SOUND_MIXER_VOLUME,   "Master",               0 },
1291                 { SOUND_MIXER_VOLUME,   "Front",                0 }, /* fallback */
1292                 { SOUND_MIXER_BASS,     "Tone Control - Bass",  0 },
1293                 { SOUND_MIXER_TREBLE,   "Tone Control - Treble", 0 },
1294                 { SOUND_MIXER_SYNTH,    "Synth",                0 },
1295                 { SOUND_MIXER_SYNTH,    "FM",                   0 }, /* fallback */
1296                 { SOUND_MIXER_SYNTH,    "Music",                0 }, /* fallback */
1297                 { SOUND_MIXER_PCM,      "PCM",                  0 },
1298                 { SOUND_MIXER_SPEAKER,  "Beep",                 0 },
1299                 { SOUND_MIXER_SPEAKER,  "PC Speaker",           0 }, /* fallback */
1300                 { SOUND_MIXER_SPEAKER,  "Speaker",              0 }, /* fallback */
1301                 { SOUND_MIXER_LINE,     "Line",                 0 },
1302                 { SOUND_MIXER_MIC,      "Mic",                  0 },
1303                 { SOUND_MIXER_CD,       "CD",                   0 },
1304                 { SOUND_MIXER_IMIX,     "Monitor Mix",          0 },
1305                 { SOUND_MIXER_ALTPCM,   "PCM",                  1 },
1306                 { SOUND_MIXER_ALTPCM,   "Headphone",            0 }, /* fallback */
1307                 { SOUND_MIXER_ALTPCM,   "Wave",                 0 }, /* fallback */
1308                 { SOUND_MIXER_RECLEV,   "-- nothing --",        0 },
1309                 { SOUND_MIXER_IGAIN,    "Capture",              0 },
1310                 { SOUND_MIXER_OGAIN,    "Playback",             0 },
1311                 { SOUND_MIXER_LINE1,    "Aux",                  0 },
1312                 { SOUND_MIXER_LINE2,    "Aux",                  1 },
1313                 { SOUND_MIXER_LINE3,    "Aux",                  2 },
1314                 { SOUND_MIXER_DIGITAL1, "Digital",              0 },
1315                 { SOUND_MIXER_DIGITAL1, "IEC958",               0 }, /* fallback */
1316                 { SOUND_MIXER_DIGITAL1, "IEC958 Optical",       0 }, /* fallback */
1317                 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial",       0 }, /* fallback */
1318                 { SOUND_MIXER_DIGITAL2, "Digital",              1 },
1319                 { SOUND_MIXER_DIGITAL3, "Digital",              2 },
1320                 { SOUND_MIXER_PHONEIN,  "Phone",                0 },
1321                 { SOUND_MIXER_PHONEOUT, "Master Mono",          0 },
1322                 { SOUND_MIXER_PHONEOUT, "Speaker",              0 }, /*fallback*/
1323                 { SOUND_MIXER_PHONEOUT, "Mono",                 0 }, /*fallback*/
1324                 { SOUND_MIXER_PHONEOUT, "Phone",                0 }, /* fallback */
1325                 { SOUND_MIXER_VIDEO,    "Video",                0 },
1326                 { SOUND_MIXER_RADIO,    "Radio",                0 },
1327                 { SOUND_MIXER_MONITOR,  "Monitor",              0 }
1328         };
1329         unsigned int idx;
1330
1331         for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1332                 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1333         if (mixer->mask_recsrc) {
1334                 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1335                 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1336         }
1337 }
1338
1339 /*
1340  *
1341  */
1342
1343 static int snd_mixer_oss_free1(void *private)
1344 {
1345         struct snd_mixer_oss *mixer = private;
1346         struct snd_card *card;
1347         int idx;
1348
1349         if (!mixer)
1350                 return 0;
1351         card = mixer->card;
1352         if (snd_BUG_ON(mixer != card->mixer_oss))
1353                 return -ENXIO;
1354         card->mixer_oss = NULL;
1355         for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1356                 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1357                 if (chn->private_free)
1358                         chn->private_free(chn);
1359         }
1360         kfree(mixer);
1361         return 0;
1362 }
1363
1364 static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1365 {
1366         struct snd_mixer_oss *mixer;
1367
1368         if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1369                 int idx, err;
1370
1371                 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1372                 if (mixer == NULL)
1373                         return -ENOMEM;
1374                 mutex_init(&mixer->reg_mutex);
1375                 if ((err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1376                                                    card, 0,
1377                                                    &snd_mixer_oss_f_ops, card)) < 0) {
1378                         dev_err(card->dev,
1379                                 "unable to register OSS mixer device %i:%i\n",
1380                                 card->number, 0);
1381                         kfree(mixer);
1382                         return err;
1383                 }
1384                 mixer->oss_dev_alloc = 1;
1385                 mixer->card = card;
1386                 if (*card->mixername)
1387                         strlcpy(mixer->name, card->mixername, sizeof(mixer->name));
1388                 else
1389                         snprintf(mixer->name, sizeof(mixer->name),
1390                                  "mixer%i", card->number);
1391 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1392                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1393                                       card->number,
1394                                       mixer->name);
1395 #endif
1396                 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1397                         mixer->slots[idx].number = idx;
1398                 card->mixer_oss = mixer;
1399                 snd_mixer_oss_build(mixer);
1400                 snd_mixer_oss_proc_init(mixer);
1401         } else {
1402                 mixer = card->mixer_oss;
1403                 if (mixer == NULL)
1404                         return 0;
1405                 if (mixer->oss_dev_alloc) {
1406 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1407                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1408 #endif
1409                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1410                         mixer->oss_dev_alloc = 0;
1411                 }
1412                 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1413                         return 0;
1414                 snd_mixer_oss_proc_done(mixer);
1415                 return snd_mixer_oss_free1(mixer);
1416         }
1417         return 0;
1418 }
1419
1420 static int __init alsa_mixer_oss_init(void)
1421 {
1422         int idx;
1423
1424         snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1425         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1426                 if (snd_cards[idx])
1427                         snd_mixer_oss_notify_handler(snd_cards[idx], SND_MIXER_OSS_NOTIFY_REGISTER);
1428         }
1429         return 0;
1430 }
1431
1432 static void __exit alsa_mixer_oss_exit(void)
1433 {
1434         int idx;
1435
1436         snd_mixer_oss_notify_callback = NULL;
1437         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1438                 if (snd_cards[idx])
1439                         snd_mixer_oss_notify_handler(snd_cards[idx], SND_MIXER_OSS_NOTIFY_FREE);
1440         }
1441 }
1442
1443 module_init(alsa_mixer_oss_init)
1444 module_exit(alsa_mixer_oss_exit)
1445
1446 EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);