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