git.oblomov.eu Git - linux-2.6/blob - sound/core/oss/pcm_oss.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer / OSS compatible
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.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 #if 0
  23 #define PLUGIN_DEBUG
  24 #endif
  25 #if 0
  26 #define OSS_DEBUG
  27 #endif
  28
  29 #include <sound/driver.h>
  30 #include <linux/init.h>
  31 #include <linux/smp_lock.h>
  32 #include <linux/slab.h>
  33 #include <linux/time.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/string.h>
  37 #include <sound/core.h>
  38 #include <sound/minors.h>
  39 #include <sound/pcm.h>
  40 #include <sound/pcm_params.h>
  41 #include "pcm_plugin.h"
  42 #include <sound/info.h>
  43 #include <linux/soundcard.h>
  44 #include <sound/initval.h>
  45
  46 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  47
  48 static int dsp_map[SNDRV_CARDS];
  49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  50 static int nonblock_open = 1;
  51
  52 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  54 MODULE_LICENSE("GPL");
  55 module_param_array(dsp_map, int, NULL, 0444);
  56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  57 module_param_array(adsp_map, int, NULL, 0444);
  58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  59 module_param(nonblock_open, bool, 0644);
  60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  63
  64 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
  65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  68
  69 static inline mm_segment_t snd_enter_user(void)
  70 {
  71         mm_segment_t fs = get_fs();
  72         set_fs(get_ds());
  73         return fs;
  74 }
  75
  76 static inline void snd_leave_user(mm_segment_t fs)
  77 {
  78         set_fs(fs);
  79 }
  80
  81 /*
  82  * helper functions to process hw_params
  83  */
  84 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
  85 {
  86         int changed = 0;
  87         if (i->min < min) {
  88                 i->min = min;
  89                 i->openmin = openmin;
  90                 changed = 1;
  91         } else if (i->min == min && !i->openmin && openmin) {
  92                 i->openmin = 1;
  93                 changed = 1;
  94         }
  95         if (i->integer) {
  96                 if (i->openmin) {
  97                         i->min++;
  98                         i->openmin = 0;
  99                 }
 100         }
 101         if (snd_interval_checkempty(i)) {
 102                 snd_interval_none(i);
 103                 return -EINVAL;
 104         }
 105         return changed;
 106 }
 107
 108 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
 109 {
 110         int changed = 0;
 111         if (i->max > max) {
 112                 i->max = max;
 113                 i->openmax = openmax;
 114                 changed = 1;
 115         } else if (i->max == max && !i->openmax && openmax) {
 116                 i->openmax = 1;
 117                 changed = 1;
 118         }
 119         if (i->integer) {
 120                 if (i->openmax) {
 121                         i->max--;
 122                         i->openmax = 0;
 123                 }
 124         }
 125         if (snd_interval_checkempty(i)) {
 126                 snd_interval_none(i);
 127                 return -EINVAL;
 128         }
 129         return changed;
 130 }
 131
 132 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
 133 {
 134         struct snd_interval t;
 135         t.empty = 0;
 136         t.min = t.max = val;
 137         t.openmin = t.openmax = 0;
 138         t.integer = 1;
 139         return snd_interval_refine(i, &t);
 140 }
 141
 142 /**
 143  * snd_pcm_hw_param_value_min
 144  * @params: the hw_params instance
 145  * @var: parameter to retrieve
 146  * @dir: pointer to the direction (-1,0,1) or NULL
 147  *
 148  * Return the minimum value for field PAR.
 149  */
 150 static unsigned int
 151 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
 152                            snd_pcm_hw_param_t var, int *dir)
 153 {
 154         if (hw_is_mask(var)) {
 155                 if (dir)
 156                         *dir = 0;
 157                 return snd_mask_min(hw_param_mask_c(params, var));
 158         }
 159         if (hw_is_interval(var)) {
 160                 const struct snd_interval *i = hw_param_interval_c(params, var);
 161                 if (dir)
 162                         *dir = i->openmin;
 163                 return snd_interval_min(i);
 164         }
 165         return -EINVAL;
 166 }
 167
 168 /**
 169  * snd_pcm_hw_param_value_max
 170  * @params: the hw_params instance
 171  * @var: parameter to retrieve
 172  * @dir: pointer to the direction (-1,0,1) or NULL
 173  *
 174  * Return the maximum value for field PAR.
 175  */
 176 static unsigned int
 177 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 178                            snd_pcm_hw_param_t var, int *dir)
 179 {
 180         if (hw_is_mask(var)) {
 181                 if (dir)
 182                         *dir = 0;
 183                 return snd_mask_max(hw_param_mask_c(params, var));
 184         }
 185         if (hw_is_interval(var)) {
 186                 const struct snd_interval *i = hw_param_interval_c(params, var);
 187                 if (dir)
 188                         *dir = - (int) i->openmax;
 189                 return snd_interval_max(i);
 190         }
 191         return -EINVAL;
 192 }
 193
 194 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
 195                                   snd_pcm_hw_param_t var,
 196                                   const struct snd_mask *val)
 197 {
 198         int changed;
 199         changed = snd_mask_refine(hw_param_mask(params, var), val);
 200         if (changed) {
 201                 params->cmask |= 1 << var;
 202                 params->rmask |= 1 << var;
 203         }
 204         return changed;
 205 }
 206
 207 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
 208                                  struct snd_pcm_hw_params *params,
 209                                  snd_pcm_hw_param_t var,
 210                                  const struct snd_mask *val)
 211 {
 212         int changed = _snd_pcm_hw_param_mask(params, var, val);
 213         if (changed < 0)
 214                 return changed;
 215         if (params->rmask) {
 216                 int err = snd_pcm_hw_refine(pcm, params);
 217                 if (err < 0)
 218                         return err;
 219         }
 220         return 0;
 221 }
 222
 223 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
 224                                  snd_pcm_hw_param_t var, unsigned int val,
 225                                  int dir)
 226 {
 227         int changed;
 228         int open = 0;
 229         if (dir) {
 230                 if (dir > 0) {
 231                         open = 1;
 232                 } else if (dir < 0) {
 233                         if (val > 0) {
 234                                 open = 1;
 235                                 val--;
 236                         }
 237                 }
 238         }
 239         if (hw_is_mask(var))
 240                 changed = snd_mask_refine_min(hw_param_mask(params, var),
 241                                               val + !!open);
 242         else if (hw_is_interval(var))
 243                 changed = snd_interval_refine_min(hw_param_interval(params, var),
 244                                                   val, open);
 245         else
 246                 return -EINVAL;
 247         if (changed) {
 248                 params->cmask |= 1 << var;
 249                 params->rmask |= 1 << var;
 250         }
 251         return changed;
 252 }
 253
 254 /**
 255  * snd_pcm_hw_param_min
 256  * @pcm: PCM instance
 257  * @params: the hw_params instance
 258  * @var: parameter to retrieve
 259  * @val: minimal value
 260  * @dir: pointer to the direction (-1,0,1) or NULL
 261  *
 262  * Inside configuration space defined by PARAMS remove from PAR all
 263  * values < VAL. Reduce configuration space accordingly.
 264  * Return new minimum or -EINVAL if the configuration space is empty
 265  */
 266 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
 267                                 struct snd_pcm_hw_params *params,
 268                                 snd_pcm_hw_param_t var, unsigned int val,
 269                                 int *dir)
 270 {
 271         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
 272         if (changed < 0)
 273                 return changed;
 274         if (params->rmask) {
 275                 int err = snd_pcm_hw_refine(pcm, params);
 276                 if (err < 0)
 277                         return err;
 278         }
 279         return snd_pcm_hw_param_value_min(params, var, dir);
 280 }
 281
 282 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
 283                                  snd_pcm_hw_param_t var, unsigned int val,
 284                                  int dir)
 285 {
 286         int changed;
 287         int open = 0;
 288         if (dir) {
 289                 if (dir < 0) {
 290                         open = 1;
 291                 } else if (dir > 0) {
 292                         open = 1;
 293                         val++;
 294                 }
 295         }
 296         if (hw_is_mask(var)) {
 297                 if (val == 0 && open) {
 298                         snd_mask_none(hw_param_mask(params, var));
 299                         changed = -EINVAL;
 300                 } else
 301                         changed = snd_mask_refine_max(hw_param_mask(params, var),
 302                                                       val - !!open);
 303         } else if (hw_is_interval(var))
 304                 changed = snd_interval_refine_max(hw_param_interval(params, var),
 305                                                   val, open);
 306         else
 307                 return -EINVAL;
 308         if (changed) {
 309                 params->cmask |= 1 << var;
 310                 params->rmask |= 1 << var;
 311         }
 312         return changed;
 313 }
 314
 315 /**
 316  * snd_pcm_hw_param_max
 317  * @pcm: PCM instance
 318  * @params: the hw_params instance
 319  * @var: parameter to retrieve
 320  * @val: maximal value
 321  * @dir: pointer to the direction (-1,0,1) or NULL
 322  *
 323  * Inside configuration space defined by PARAMS remove from PAR all
 324  *  values >= VAL + 1. Reduce configuration space accordingly.
 325  *  Return new maximum or -EINVAL if the configuration space is empty
 326  */
 327 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
 328                                 struct snd_pcm_hw_params *params,
 329                                 snd_pcm_hw_param_t var, unsigned int val,
 330                                 int *dir)
 331 {
 332         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
 333         if (changed < 0)
 334                 return changed;
 335         if (params->rmask) {
 336                 int err = snd_pcm_hw_refine(pcm, params);
 337                 if (err < 0)
 338                         return err;
 339         }
 340         return snd_pcm_hw_param_value_max(params, var, dir);
 341 }
 342
 343 static int boundary_sub(int a, int adir,
 344                         int b, int bdir,
 345                         int *c, int *cdir)
 346 {
 347         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
 348         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
 349         *c = a - b;
 350         *cdir = adir - bdir;
 351         if (*cdir == -2) {
 352                 (*c)--;
 353         } else if (*cdir == 2) {
 354                 (*c)++;
 355         }
 356         return 0;
 357 }
 358
 359 static int boundary_lt(unsigned int a, int adir,
 360                        unsigned int b, int bdir)
 361 {
 362         if (adir < 0) {
 363                 a--;
 364                 adir = 1;
 365         } else if (adir > 0)
 366                 adir = 1;
 367         if (bdir < 0) {
 368                 b--;
 369                 bdir = 1;
 370         } else if (bdir > 0)
 371                 bdir = 1;
 372         return a < b || (a == b && adir < bdir);
 373 }
 374
 375 /* Return 1 if min is nearer to best than max */
 376 static int boundary_nearer(int min, int mindir,
 377                            int best, int bestdir,
 378                            int max, int maxdir)
 379 {
 380         int dmin, dmindir;
 381         int dmax, dmaxdir;
 382         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
 383         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
 384         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
 385 }
 386
 387 /**
 388  * snd_pcm_hw_param_near
 389  * @pcm: PCM instance
 390  * @params: the hw_params instance
 391  * @var: parameter to retrieve
 392  * @best: value to set
 393  * @dir: pointer to the direction (-1,0,1) or NULL
 394  *
 395  * Inside configuration space defined by PARAMS set PAR to the available value
 396  * nearest to VAL. Reduce configuration space accordingly.
 397  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
 398  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
 399  * Return the value found.
 400   */
 401 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 402                                  struct snd_pcm_hw_params *params,
 403                                  snd_pcm_hw_param_t var, unsigned int best,
 404                                  int *dir)
 405 {
 406         struct snd_pcm_hw_params *save = NULL;
 407         int v;
 408         unsigned int saved_min;
 409         int last = 0;
 410         int min, max;
 411         int mindir, maxdir;
 412         int valdir = dir ? *dir : 0;
 413         /* FIXME */
 414         if (best > INT_MAX)
 415                 best = INT_MAX;
 416         min = max = best;
 417         mindir = maxdir = valdir;
 418         if (maxdir > 0)
 419                 maxdir = 0;
 420         else if (maxdir == 0)
 421                 maxdir = -1;
 422         else {
 423                 maxdir = 1;
 424                 max--;
 425         }
 426         save = kmalloc(sizeof(*save), GFP_KERNEL);
 427         if (save == NULL)
 428                 return -ENOMEM;
 429         *save = *params;
 430         saved_min = min;
 431         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
 432         if (min >= 0) {
 433                 struct snd_pcm_hw_params *params1;
 434                 if (max < 0)
 435                         goto _end;
 436                 if ((unsigned int)min == saved_min && mindir == valdir)
 437                         goto _end;
 438                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
 439                 if (params1 == NULL) {
 440                         kfree(save);
 441                         return -ENOMEM;
 442                 }
 443                 *params1 = *save;
 444                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
 445                 if (max < 0) {
 446                         kfree(params1);
 447                         goto _end;
 448                 }
 449                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
 450                         *params = *params1;
 451                         last = 1;
 452                 }
 453                 kfree(params1);
 454         } else {
 455                 *params = *save;
 456                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
 457                 snd_assert(max >= 0, return -EINVAL);
 458                 last = 1;
 459         }
 460  _end:
 461         kfree(save);
 462         if (last)
 463                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 464         else
 465                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 466         snd_assert(v >= 0, return -EINVAL);
 467         return v;
 468 }
 469
 470 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 471                                  snd_pcm_hw_param_t var, unsigned int val,
 472                                  int dir)
 473 {
 474         int changed;
 475         if (hw_is_mask(var)) {
 476                 struct snd_mask *m = hw_param_mask(params, var);
 477                 if (val == 0 && dir < 0) {
 478                         changed = -EINVAL;
 479                         snd_mask_none(m);
 480                 } else {
 481                         if (dir > 0)
 482                                 val++;
 483                         else if (dir < 0)
 484                                 val--;
 485                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 486                 }
 487         } else if (hw_is_interval(var)) {
 488                 struct snd_interval *i = hw_param_interval(params, var);
 489                 if (val == 0 && dir < 0) {
 490                         changed = -EINVAL;
 491                         snd_interval_none(i);
 492                 } else if (dir == 0)
 493                         changed = snd_interval_refine_set(i, val);
 494                 else {
 495                         struct snd_interval t;
 496                         t.openmin = 1;
 497                         t.openmax = 1;
 498                         t.empty = 0;
 499                         t.integer = 0;
 500                         if (dir < 0) {
 501                                 t.min = val - 1;
 502                                 t.max = val;
 503                         } else {
 504                                 t.min = val;
 505                                 t.max = val+1;
 506                         }
 507                         changed = snd_interval_refine(i, &t);
 508                 }
 509         } else
 510                 return -EINVAL;
 511         if (changed) {
 512                 params->cmask |= 1 << var;
 513                 params->rmask |= 1 << var;
 514         }
 515         return changed;
 516 }
 517
 518 /**
 519  * snd_pcm_hw_param_set
 520  * @pcm: PCM instance
 521  * @params: the hw_params instance
 522  * @var: parameter to retrieve
 523  * @val: value to set
 524  * @dir: pointer to the direction (-1,0,1) or NULL
 525  *
 526  * Inside configuration space defined by PARAMS remove from PAR all
 527  * values != VAL. Reduce configuration space accordingly.
 528  *  Return VAL or -EINVAL if the configuration space is empty
 529  */
 530 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 531                                 struct snd_pcm_hw_params *params,
 532                                 snd_pcm_hw_param_t var, unsigned int val,
 533                                 int dir)
 534 {
 535         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 536         if (changed < 0)
 537                 return changed;
 538         if (params->rmask) {
 539                 int err = snd_pcm_hw_refine(pcm, params);
 540                 if (err < 0)
 541                         return err;
 542         }
 543         return snd_pcm_hw_param_value(params, var, NULL);
 544 }
 545
 546 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 547                                         snd_pcm_hw_param_t var)
 548 {
 549         int changed;
 550         changed = snd_interval_setinteger(hw_param_interval(params, var));
 551         if (changed) {
 552                 params->cmask |= 1 << var;
 553                 params->rmask |= 1 << var;
 554         }
 555         return changed;
 556 }
 557
 558 /*
 559  * plugin
 560  */
 561
 562 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 563 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 564 {
 565         struct snd_pcm_runtime *runtime = substream->runtime;
 566         struct snd_pcm_plugin *plugin, *next;
 567
 568         plugin = runtime->oss.plugin_first;
 569         while (plugin) {
 570                 next = plugin->next;
 571                 snd_pcm_plugin_free(plugin);
 572                 plugin = next;
 573         }
 574         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 575         return 0;
 576 }
 577
 578 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 579 {
 580         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 581         plugin->next = runtime->oss.plugin_first;
 582         plugin->prev = NULL;
 583         if (runtime->oss.plugin_first) {
 584                 runtime->oss.plugin_first->prev = plugin;
 585                 runtime->oss.plugin_first = plugin;
 586         } else {
 587                 runtime->oss.plugin_last =
 588                 runtime->oss.plugin_first = plugin;
 589         }
 590         return 0;
 591 }
 592
 593 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 594 {
 595         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 596         plugin->next = NULL;
 597         plugin->prev = runtime->oss.plugin_last;
 598         if (runtime->oss.plugin_last) {
 599                 runtime->oss.plugin_last->next = plugin;
 600                 runtime->oss.plugin_last = plugin;
 601         } else {
 602                 runtime->oss.plugin_last =
 603                 runtime->oss.plugin_first = plugin;
 604         }
 605         return 0;
 606 }
 607 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 608
 609 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 610 {
 611         struct snd_pcm_runtime *runtime = substream->runtime;
 612         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 613         long bytes = frames_to_bytes(runtime, frames);
 614         if (buffer_size == runtime->oss.buffer_bytes)
 615                 return bytes;
 616 #if BITS_PER_LONG >= 64
 617         return runtime->oss.buffer_bytes * bytes / buffer_size;
 618 #else
 619         {
 620                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 621                 u32 rem;
 622                 div64_32(&bsize, buffer_size, &rem);
 623                 return (long)bsize;
 624         }
 625 #endif
 626 }
 627
 628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 629 {
 630         struct snd_pcm_runtime *runtime = substream->runtime;
 631         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 632         if (buffer_size == runtime->oss.buffer_bytes)
 633                 return bytes_to_frames(runtime, bytes);
 634         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 635 }
 636
 637 static int snd_pcm_oss_format_from(int format)
 638 {
 639         switch (format) {
 640         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 641         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 642         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 643         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 644         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 645         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 646         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 647         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 648         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 649         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 650         default:                return SNDRV_PCM_FORMAT_U8;
 651         }
 652 }
 653
 654 static int snd_pcm_oss_format_to(int format)
 655 {
 656         switch (format) {
 657         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 658         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 659         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 660         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 661         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 662         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 663         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 664         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 665         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 666         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 667         default:                        return -EINVAL;
 668         }
 669 }
 670
 671 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 672                                    struct snd_pcm_hw_params *oss_params,
 673                                    struct snd_pcm_hw_params *slave_params)
 674 {
 675         size_t s;
 676         size_t oss_buffer_size, oss_period_size, oss_periods;
 677         size_t min_period_size, max_period_size;
 678         struct snd_pcm_runtime *runtime = substream->runtime;
 679         size_t oss_frame_size;
 680
 681         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 682                          params_channels(oss_params) / 8;
 683
 684         oss_buffer_size = snd_pcm_plug_client_size(substream,
 685                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 686         oss_buffer_size = 1 << ld2(oss_buffer_size);
 687         if (atomic_read(&substream->mmap_count)) {
 688                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 689                         oss_buffer_size = runtime->oss.mmap_bytes;
 690         }
 691
 692         if (substream->oss.setup.period_size > 16)
 693                 oss_period_size = substream->oss.setup.period_size;
 694         else if (runtime->oss.fragshift) {
 695                 oss_period_size = 1 << runtime->oss.fragshift;
 696                 if (oss_period_size > oss_buffer_size / 2)
 697                         oss_period_size = oss_buffer_size / 2;
 698         } else {
 699                 int sd;
 700                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 701
 702                 oss_period_size = oss_buffer_size;
 703                 do {
 704                         oss_period_size /= 2;
 705                 } while (oss_period_size > bytes_per_sec);
 706                 if (runtime->oss.subdivision == 0) {
 707                         sd = 4;
 708                         if (oss_period_size / sd > 4096)
 709                                 sd *= 2;
 710                         if (oss_period_size / sd < 4096)
 711                                 sd = 1;
 712                 } else
 713                         sd = runtime->oss.subdivision;
 714                 oss_period_size /= sd;
 715                 if (oss_period_size < 16)
 716                         oss_period_size = 16;
 717         }
 718
 719         min_period_size = snd_pcm_plug_client_size(substream,
 720                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 721         min_period_size *= oss_frame_size;
 722         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 723         if (oss_period_size < min_period_size)
 724                 oss_period_size = min_period_size;
 725
 726         max_period_size = snd_pcm_plug_client_size(substream,
 727                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 728         max_period_size *= oss_frame_size;
 729         max_period_size = 1 << ld2(max_period_size);
 730         if (oss_period_size > max_period_size)
 731                 oss_period_size = max_period_size;
 732
 733         oss_periods = oss_buffer_size / oss_period_size;
 734
 735         if (substream->oss.setup.periods > 1)
 736                 oss_periods = substream->oss.setup.periods;
 737
 738         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 739         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 740                 s = runtime->oss.maxfrags;
 741         if (oss_periods > s)
 742                 oss_periods = s;
 743
 744         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 745         if (s < 2)
 746                 s = 2;
 747         if (oss_periods < s)
 748                 oss_periods = s;
 749
 750         while (oss_period_size * oss_periods > oss_buffer_size)
 751                 oss_period_size /= 2;
 752
 753         snd_assert(oss_period_size >= 16, return -EINVAL);
 754         runtime->oss.period_bytes = oss_period_size;
 755         runtime->oss.period_frames = 1;
 756         runtime->oss.periods = oss_periods;
 757         return 0;
 758 }
 759
 760 static int choose_rate(struct snd_pcm_substream *substream,
 761                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 762 {
 763         struct snd_interval *it;
 764         struct snd_pcm_hw_params *save;
 765         unsigned int rate, prev;
 766
 767         save = kmalloc(sizeof(*save), GFP_KERNEL);
 768         if (save == NULL)
 769                 return -ENOMEM;
 770         *save = *params;
 771         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 772
 773         /* try multiples of the best rate */
 774         rate = best_rate;
 775         for (;;) {
 776                 if (it->max < rate || (it->max == rate && it->openmax))
 777                         break;
 778                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 779                         int ret;
 780                         ret = snd_pcm_hw_param_set(substream, params,
 781                                                    SNDRV_PCM_HW_PARAM_RATE,
 782                                                    rate, 0);
 783                         if (ret == (int)rate) {
 784                                 kfree(save);
 785                                 return rate;
 786                         }
 787                         *params = *save;
 788                 }
 789                 prev = rate;
 790                 rate += best_rate;
 791                 if (rate <= prev)
 792                         break;
 793         }
 794
 795         /* not found, use the nearest rate */
 796         kfree(save);
 797         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 798 }
 799
 800 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 801 {
 802         struct snd_pcm_runtime *runtime = substream->runtime;
 803         struct snd_pcm_hw_params *params, *sparams;
 804         struct snd_pcm_sw_params *sw_params;
 805         ssize_t oss_buffer_size, oss_period_size;
 806         size_t oss_frame_size;
 807         int err;
 808         int direct;
 809         int format, sformat, n;
 810         struct snd_mask sformat_mask;
 811         struct snd_mask mask;
 812
 813         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 814         params = kmalloc(sizeof(*params), GFP_KERNEL);
 815         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 816         if (!sw_params || !params || !sparams) {
 817                 snd_printd("No memory\n");
 818                 err = -ENOMEM;
 819                 goto failure;
 820         }
 821
 822         if (atomic_read(&substream->mmap_count))
 823                 direct = 1;
 824         else
 825                 direct = substream->oss.setup.direct;
 826
 827         _snd_pcm_hw_params_any(sparams);
 828         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 829         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 830         snd_mask_none(&mask);
 831         if (atomic_read(&substream->mmap_count))
 832                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 833         else {
 834                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 835                 if (!direct)
 836                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 837         }
 838         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 839         if (err < 0) {
 840                 snd_printd("No usable accesses\n");
 841                 err = -EINVAL;
 842                 goto failure;
 843         }
 844         choose_rate(substream, sparams, runtime->oss.rate);
 845         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 846
 847         format = snd_pcm_oss_format_from(runtime->oss.format);
 848
 849         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 850         if (direct)
 851                 sformat = format;
 852         else
 853                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 854
 855         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 856                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 857                         if (snd_mask_test(&sformat_mask, sformat) &&
 858                             snd_pcm_oss_format_to(sformat) >= 0)
 859                                 break;
 860                 }
 861                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 862                         snd_printd("Cannot find a format!!!\n");
 863                         err = -EINVAL;
 864                         goto failure;
 865                 }
 866         }
 867         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 868         snd_assert(err >= 0, goto failure);
 869
 870         if (direct) {
 871                 memcpy(params, sparams, sizeof(*params));
 872         } else {
 873                 _snd_pcm_hw_params_any(params);
 874                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 875                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 876                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 877                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 878                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 879                                       runtime->oss.channels, 0);
 880                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 881                                       runtime->oss.rate, 0);
 882                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 883                          params_access(params), params_format(params),
 884                          params_channels(params), params_rate(params));
 885         }
 886         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 887                  params_access(sparams), params_format(sparams),
 888                  params_channels(sparams), params_rate(sparams));
 889
 890         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 891                          params_channels(params) / 8;
 892
 893 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 894         snd_pcm_oss_plugin_clear(substream);
 895         if (!direct) {
 896                 /* add necessary plugins */
 897                 snd_pcm_oss_plugin_clear(substream);
 898                 if ((err = snd_pcm_plug_format_plugins(substream,
 899                                                        params,
 900                                                        sparams)) < 0) {
 901                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 902                         snd_pcm_oss_plugin_clear(substream);
 903                         goto failure;
 904                 }
 905                 if (runtime->oss.plugin_first) {
 906                         struct snd_pcm_plugin *plugin;
 907                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 908                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 909                                 snd_pcm_oss_plugin_clear(substream);
 910                                 goto failure;
 911                         }
 912                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 913                                 err = snd_pcm_plugin_append(plugin);
 914                         } else {
 915                                 err = snd_pcm_plugin_insert(plugin);
 916                         }
 917                         if (err < 0) {
 918                                 snd_pcm_oss_plugin_clear(substream);
 919                                 goto failure;
 920                         }
 921                 }
 922         }
 923 #endif
 924
 925         err = snd_pcm_oss_period_size(substream, params, sparams);
 926         if (err < 0)
 927                 goto failure;
 928
 929         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 930         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 931         snd_assert(err >= 0, goto failure);
 932
 933         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 934                                      runtime->oss.periods, NULL);
 935         snd_assert(err >= 0, goto failure);
 936
 937         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 938
 939         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 940                 snd_printd("HW_PARAMS failed: %i\n", err);
 941                 goto failure;
 942         }
 943
 944         memset(sw_params, 0, sizeof(*sw_params));
 945         if (runtime->oss.trigger) {
 946                 sw_params->start_threshold = 1;
 947         } else {
 948                 sw_params->start_threshold = runtime->boundary;
 949         }
 950         if (atomic_read(&substream->mmap_count) ||
 951             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 952                 sw_params->stop_threshold = runtime->boundary;
 953         else
 954                 sw_params->stop_threshold = runtime->buffer_size;
 955         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 956         sw_params->period_step = 1;
 957         sw_params->sleep_min = 0;
 958         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 959                 1 : runtime->period_size;
 960         sw_params->xfer_align = 1;
 961         if (atomic_read(&substream->mmap_count) ||
 962             substream->oss.setup.nosilence) {
 963                 sw_params->silence_threshold = 0;
 964                 sw_params->silence_size = 0;
 965         } else {
 966                 snd_pcm_uframes_t frames;
 967                 frames = runtime->period_size + 16;
 968                 if (frames > runtime->buffer_size)
 969                         frames = runtime->buffer_size;
 970                 sw_params->silence_threshold = frames;
 971                 sw_params->silence_size = frames;
 972         }
 973
 974         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
 975                 snd_printd("SW_PARAMS failed: %i\n", err);
 976                 goto failure;
 977         }
 978
 979         runtime->oss.periods = params_periods(sparams);
 980         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
 981         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
 982 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 983         if (runtime->oss.plugin_first) {
 984                 err = snd_pcm_plug_alloc(substream, oss_period_size);
 985                 if (err < 0)
 986                         goto failure;
 987         }
 988 #endif
 989         oss_period_size *= oss_frame_size;
 990
 991         oss_buffer_size = oss_period_size * runtime->oss.periods;
 992         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
 993
 994         runtime->oss.period_bytes = oss_period_size;
 995         runtime->oss.buffer_bytes = oss_buffer_size;
 996
 997         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
 998                  runtime->oss.period_bytes,
 999                  runtime->oss.buffer_bytes);
1000         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1001                  params_period_size(sparams),
1002                  params_buffer_size(sparams));
1003
1004         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1005         runtime->oss.channels = params_channels(params);
1006         runtime->oss.rate = params_rate(params);
1007
1008         runtime->oss.params = 0;
1009         runtime->oss.prepare = 1;
1010         vfree(runtime->oss.buffer);
1011         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1012         runtime->oss.buffer_used = 0;
1013         if (runtime->dma_area)
1014                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1015
1016         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1017
1018         err = 0;
1019 failure:
1020         kfree(sw_params);
1021         kfree(params);
1022         kfree(sparams);
1023         return err;
1024 }
1025
1026 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1027 {
1028         int idx, err;
1029         struct snd_pcm_substream *asubstream = NULL, *substream;
1030
1031         for (idx = 0; idx < 2; idx++) {
1032                 substream = pcm_oss_file->streams[idx];
1033                 if (substream == NULL)
1034                         continue;
1035                 if (asubstream == NULL)
1036                         asubstream = substream;
1037                 if (substream->runtime->oss.params) {
1038                         err = snd_pcm_oss_change_params(substream);
1039                         if (err < 0)
1040                                 return err;
1041                 }
1042         }
1043         snd_assert(asubstream != NULL, return -EIO);
1044         if (r_substream)
1045                 *r_substream = asubstream;
1046         return 0;
1047 }
1048
1049 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1050 {
1051         int err;
1052         struct snd_pcm_runtime *runtime = substream->runtime;
1053
1054         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1055         if (err < 0) {
1056                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1057                 return err;
1058         }
1059         runtime->oss.prepare = 0;
1060         runtime->oss.prev_hw_ptr_interrupt = 0;
1061         runtime->oss.period_ptr = 0;
1062         runtime->oss.buffer_used = 0;
1063
1064         return 0;
1065 }
1066
1067 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1068 {
1069         struct snd_pcm_runtime *runtime;
1070         int err;
1071
1072         if (substream == NULL)
1073                 return 0;
1074         runtime = substream->runtime;
1075         if (runtime->oss.params) {
1076                 err = snd_pcm_oss_change_params(substream);
1077                 if (err < 0)
1078                         return err;
1079         }
1080         if (runtime->oss.prepare) {
1081                 err = snd_pcm_oss_prepare(substream);
1082                 if (err < 0)
1083                         return err;
1084         }
1085         return 0;
1086 }
1087
1088 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1089 {
1090         struct snd_pcm_runtime *runtime;
1091         snd_pcm_uframes_t frames;
1092         int err = 0;
1093
1094         while (1) {
1095                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1096                 if (err < 0)
1097                         break;
1098                 runtime = substream->runtime;
1099                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1100                         break;
1101                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1102                 /* until avail(delay) <= buffer_size */
1103                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1104                 frames /= runtime->period_size;
1105                 frames *= runtime->period_size;
1106                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1107                 if (err < 0)
1108                         break;
1109         }
1110         return err;
1111 }
1112
1113 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1114 {
1115         struct snd_pcm_runtime *runtime = substream->runtime;
1116         int ret;
1117         while (1) {
1118                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1119                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1120 #ifdef OSS_DEBUG
1121                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1122                                 printk("pcm_oss: write: recovering from XRUN\n");
1123                         else
1124                                 printk("pcm_oss: write: recovering from SUSPEND\n");
1125 #endif
1126                         ret = snd_pcm_oss_prepare(substream);
1127                         if (ret < 0)
1128                                 break;
1129                 }
1130                 if (in_kernel) {
1131                         mm_segment_t fs;
1132                         fs = snd_enter_user();
1133                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1134                         snd_leave_user(fs);
1135                 } else {
1136                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1137                 }
1138                 if (ret != -EPIPE && ret != -ESTRPIPE)
1139                         break;
1140                 /* test, if we can't store new data, because the stream */
1141                 /* has not been started */
1142                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1143                         return -EAGAIN;
1144         }
1145         return ret;
1146 }
1147
1148 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1149 {
1150         struct snd_pcm_runtime *runtime = substream->runtime;
1151         snd_pcm_sframes_t delay;
1152         int ret;
1153         while (1) {
1154                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1155                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1156 #ifdef OSS_DEBUG
1157                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1158                                 printk("pcm_oss: read: recovering from XRUN\n");
1159                         else
1160                                 printk("pcm_oss: read: recovering from SUSPEND\n");
1161 #endif
1162                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1163                         if (ret < 0)
1164                                 break;
1165                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1166                         ret = snd_pcm_oss_prepare(substream);
1167                         if (ret < 0)
1168                                 break;
1169                 }
1170                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1171                 if (ret < 0)
1172                         break;
1173                 if (in_kernel) {
1174                         mm_segment_t fs;
1175                         fs = snd_enter_user();
1176                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1177                         snd_leave_user(fs);
1178                 } else {
1179                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1180                 }
1181                 if (ret == -EPIPE) {
1182                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1183                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1184                                 if (ret < 0)
1185                                         break;
1186                         }
1187                         continue;
1188                 }
1189                 if (ret != -ESTRPIPE)
1190                         break;
1191         }
1192         return ret;
1193 }
1194
1195 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1196 {
1197         struct snd_pcm_runtime *runtime = substream->runtime;
1198         int ret;
1199         while (1) {
1200                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1201                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1202 #ifdef OSS_DEBUG
1203                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1204                                 printk("pcm_oss: writev: recovering from XRUN\n");
1205                         else
1206                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
1207 #endif
1208                         ret = snd_pcm_oss_prepare(substream);
1209                         if (ret < 0)
1210                                 break;
1211                 }
1212                 if (in_kernel) {
1213                         mm_segment_t fs;
1214                         fs = snd_enter_user();
1215                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1216                         snd_leave_user(fs);
1217                 } else {
1218                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1219                 }
1220                 if (ret != -EPIPE && ret != -ESTRPIPE)
1221                         break;
1222
1223                 /* test, if we can't store new data, because the stream */
1224                 /* has not been started */
1225                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1226                         return -EAGAIN;
1227         }
1228         return ret;
1229 }
1230
1231 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1232 {
1233         struct snd_pcm_runtime *runtime = substream->runtime;
1234         int ret;
1235         while (1) {
1236                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1237                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1238 #ifdef OSS_DEBUG
1239                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1240                                 printk("pcm_oss: readv: recovering from XRUN\n");
1241                         else
1242                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
1243 #endif
1244                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1245                         if (ret < 0)
1246                                 break;
1247                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1248                         ret = snd_pcm_oss_prepare(substream);
1249                         if (ret < 0)
1250                                 break;
1251                 }
1252                 if (in_kernel) {
1253                         mm_segment_t fs;
1254                         fs = snd_enter_user();
1255                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1256                         snd_leave_user(fs);
1257                 } else {
1258                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1259                 }
1260                 if (ret != -EPIPE && ret != -ESTRPIPE)
1261                         break;
1262         }
1263         return ret;
1264 }
1265
1266 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1267 {
1268         struct snd_pcm_runtime *runtime = substream->runtime;
1269         snd_pcm_sframes_t frames, frames1;
1270 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1271         if (runtime->oss.plugin_first) {
1272                 struct snd_pcm_plugin_channel *channels;
1273                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1274                 if (!in_kernel) {
1275                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1276                                 return -EFAULT;
1277                         buf = runtime->oss.buffer;
1278                 }
1279                 frames = bytes / oss_frame_bytes;
1280                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1281                 if (frames1 < 0)
1282                         return frames1;
1283                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1284                 if (frames1 <= 0)
1285                         return frames1;
1286                 bytes = frames1 * oss_frame_bytes;
1287         } else
1288 #endif
1289         {
1290                 frames = bytes_to_frames(runtime, bytes);
1291                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1292                 if (frames1 <= 0)
1293                         return frames1;
1294                 bytes = frames_to_bytes(runtime, frames1);
1295         }
1296         return bytes;
1297 }
1298
1299 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1300 {
1301         size_t xfer = 0;
1302         ssize_t tmp;
1303         struct snd_pcm_runtime *runtime = substream->runtime;
1304
1305         if (atomic_read(&substream->mmap_count))
1306                 return -ENXIO;
1307
1308         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1309                 return tmp;
1310         while (bytes > 0) {
1311                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1312                         tmp = bytes;
1313                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1314                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1315                         if (tmp > 0) {
1316                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
1317                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
1318                         }
1319                         runtime->oss.buffer_used += tmp;
1320                         buf += tmp;
1321                         bytes -= tmp;
1322                         xfer += tmp;
1323                         if (substream->oss.setup.partialfrag ||
1324                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1325                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1326                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1327                                 if (tmp <= 0)
1328                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1329                                 runtime->oss.bytes += tmp;
1330                                 runtime->oss.period_ptr += tmp;
1331                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1332                                 if (runtime->oss.period_ptr == 0 ||
1333                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1334                                         runtime->oss.buffer_used = 0;
1335                                 else if ((substream->f_flags & O_NONBLOCK) != 0)
1336                                         return xfer > 0 ? xfer : -EAGAIN;
1337                         }
1338                 } else {
1339                         tmp = snd_pcm_oss_write2(substream,
1340                                                  (const char __force *)buf,
1341                                                  runtime->oss.period_bytes, 0);
1342                         if (tmp <= 0)
1343                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1344                         runtime->oss.bytes += tmp;
1345                         buf += tmp;
1346                         bytes -= tmp;
1347                         xfer += tmp;
1348                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1349                             tmp != runtime->oss.period_bytes)
1350                                 break;
1351                 }
1352         }
1353         return xfer;
1354 }
1355
1356 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1357 {
1358         struct snd_pcm_runtime *runtime = substream->runtime;
1359         snd_pcm_sframes_t frames, frames1;
1360 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1361         char __user *final_dst = (char __user *)buf;
1362         if (runtime->oss.plugin_first) {
1363                 struct snd_pcm_plugin_channel *channels;
1364                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1365                 if (!in_kernel)
1366                         buf = runtime->oss.buffer;
1367                 frames = bytes / oss_frame_bytes;
1368                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1369                 if (frames1 < 0)
1370                         return frames1;
1371                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1372                 if (frames1 <= 0)
1373                         return frames1;
1374                 bytes = frames1 * oss_frame_bytes;
1375                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1376                         return -EFAULT;
1377         } else
1378 #endif
1379         {
1380                 frames = bytes_to_frames(runtime, bytes);
1381                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1382                 if (frames1 <= 0)
1383                         return frames1;
1384                 bytes = frames_to_bytes(runtime, frames1);
1385         }
1386         return bytes;
1387 }
1388
1389 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1390 {
1391         size_t xfer = 0;
1392         ssize_t tmp;
1393         struct snd_pcm_runtime *runtime = substream->runtime;
1394
1395         if (atomic_read(&substream->mmap_count))
1396                 return -ENXIO;
1397
1398         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1399                 return tmp;
1400         while (bytes > 0) {
1401                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1402                         if (runtime->oss.buffer_used == 0) {
1403                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1404                                 if (tmp <= 0)
1405                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1406                                 runtime->oss.bytes += tmp;
1407                                 runtime->oss.period_ptr = tmp;
1408                                 runtime->oss.buffer_used = tmp;
1409                         }
1410                         tmp = bytes;
1411                         if ((size_t) tmp > runtime->oss.buffer_used)
1412                                 tmp = runtime->oss.buffer_used;
1413                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
1414                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
1415                         buf += tmp;
1416                         bytes -= tmp;
1417                         xfer += tmp;
1418                         runtime->oss.buffer_used -= tmp;
1419                 } else {
1420                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1421                                                 runtime->oss.period_bytes, 0);
1422                         if (tmp <= 0)
1423                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1424                         runtime->oss.bytes += tmp;
1425                         buf += tmp;
1426                         bytes -= tmp;
1427                         xfer += tmp;
1428                 }
1429         }
1430         return xfer;
1431 }
1432
1433 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1434 {
1435         struct snd_pcm_substream *substream;
1436
1437         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1438         if (substream != NULL) {
1439                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1440                 substream->runtime->oss.prepare = 1;
1441         }
1442         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1443         if (substream != NULL) {
1444                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1445                 substream->runtime->oss.prepare = 1;
1446         }
1447         return 0;
1448 }
1449
1450 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1451 {
1452         struct snd_pcm_substream *substream;
1453         int err;
1454
1455         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1456         if (substream != NULL) {
1457                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1458                         return err;
1459                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1460         }
1461         /* note: all errors from the start action are ignored */
1462         /* OSS apps do not know, how to handle them */
1463         return 0;
1464 }
1465
1466 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1467 {
1468         struct snd_pcm_runtime *runtime;
1469         ssize_t result = 0;
1470         long res;
1471         wait_queue_t wait;
1472
1473         runtime = substream->runtime;
1474         init_waitqueue_entry(&wait, current);
1475         add_wait_queue(&runtime->sleep, &wait);
1476 #ifdef OSS_DEBUG
1477         printk("sync1: size = %li\n", size);
1478 #endif
1479         while (1) {
1480                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1481                 if (result > 0) {
1482                         runtime->oss.buffer_used = 0;
1483                         result = 0;
1484                         break;
1485                 }
1486                 if (result != 0 && result != -EAGAIN)
1487                         break;
1488                 result = 0;
1489                 set_current_state(TASK_INTERRUPTIBLE);
1490                 snd_pcm_stream_lock_irq(substream);
1491                 res = runtime->status->state;
1492                 snd_pcm_stream_unlock_irq(substream);
1493                 if (res != SNDRV_PCM_STATE_RUNNING) {
1494                         set_current_state(TASK_RUNNING);
1495                         break;
1496                 }
1497                 res = schedule_timeout(10 * HZ);
1498                 if (signal_pending(current)) {
1499                         result = -ERESTARTSYS;
1500                         break;
1501                 }
1502                 if (res == 0) {
1503                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1504                         result = -EIO;
1505                         break;
1506                 }
1507         }
1508         remove_wait_queue(&runtime->sleep, &wait);
1509         return result;
1510 }
1511
1512 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1513 {
1514         int err = 0;
1515         unsigned int saved_f_flags;
1516         struct snd_pcm_substream *substream;
1517         struct snd_pcm_runtime *runtime;
1518         snd_pcm_format_t format;
1519         unsigned long width;
1520         size_t size;
1521
1522         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1523         if (substream != NULL) {
1524                 runtime = substream->runtime;
1525                 if (atomic_read(&substream->mmap_count))
1526                         goto __direct;
1527                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1528                         return err;
1529                 format = snd_pcm_oss_format_from(runtime->oss.format);
1530                 width = snd_pcm_format_physical_width(format);
1531                 if (runtime->oss.buffer_used > 0) {
1532 #ifdef OSS_DEBUG
1533                         printk("sync: buffer_used\n");
1534 #endif
1535                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1536                         snd_pcm_format_set_silence(format,
1537                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1538                                                    size);
1539                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1540                         if (err < 0)
1541                                 return err;
1542                 } else if (runtime->oss.period_ptr > 0) {
1543 #ifdef OSS_DEBUG
1544                         printk("sync: period_ptr\n");
1545 #endif
1546                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1547                         snd_pcm_format_set_silence(format,
1548                                                    runtime->oss.buffer,
1549                                                    size * 8 / width);
1550                         err = snd_pcm_oss_sync1(substream, size);
1551                         if (err < 0)
1552                                 return err;
1553                 }
1554                 /*
1555                  * The ALSA's period might be a bit large than OSS one.
1556                  * Fill the remain portion of ALSA period with zeros.
1557                  */
1558                 size = runtime->control->appl_ptr % runtime->period_size;
1559                 if (size > 0) {
1560                         size = runtime->period_size - size;
1561                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1562                                 size = (runtime->frame_bits * size) / 8;
1563                                 while (size > 0) {
1564                                         mm_segment_t fs;
1565                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1566                                         size -= size1;
1567                                         size1 *= 8;
1568                                         size1 /= runtime->sample_bits;
1569                                         snd_pcm_format_set_silence(runtime->format,
1570                                                                    runtime->oss.buffer,
1571                                                                    size1);
1572                                         fs = snd_enter_user();
1573                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1574                                         snd_leave_user(fs);
1575                                 }
1576                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1577                                 void __user *buffers[runtime->channels];
1578                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1579                                 snd_pcm_lib_writev(substream, buffers, size);
1580                         }
1581                 }
1582                 /*
1583                  * finish sync: drain the buffer
1584                  */
1585               __direct:
1586                 saved_f_flags = substream->f_flags;
1587                 substream->f_flags &= ~O_NONBLOCK;
1588                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1589                 substream->f_flags = saved_f_flags;
1590                 if (err < 0)
1591                         return err;
1592                 runtime->oss.prepare = 1;
1593         }
1594
1595         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1596         if (substream != NULL) {
1597                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1598                         return err;
1599                 runtime = substream->runtime;
1600                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1601                 if (err < 0)
1602                         return err;
1603                 runtime->oss.buffer_used = 0;
1604                 runtime->oss.prepare = 1;
1605         }
1606         return 0;
1607 }
1608
1609 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1610 {
1611         int idx;
1612
1613         for (idx = 1; idx >= 0; --idx) {
1614                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1615                 struct snd_pcm_runtime *runtime;
1616                 if (substream == NULL)
1617                         continue;
1618                 runtime = substream->runtime;
1619                 if (rate < 1000)
1620                         rate = 1000;
1621                 else if (rate > 192000)
1622                         rate = 192000;
1623                 if (runtime->oss.rate != rate) {
1624                         runtime->oss.params = 1;
1625                         runtime->oss.rate = rate;
1626                 }
1627         }
1628         return snd_pcm_oss_get_rate(pcm_oss_file);
1629 }
1630
1631 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1632 {
1633         struct snd_pcm_substream *substream;
1634         int err;
1635
1636         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1637                 return err;
1638         return substream->runtime->oss.rate;
1639 }
1640
1641 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1642 {
1643         int idx;
1644         if (channels < 1)
1645                 channels = 1;
1646         if (channels > 128)
1647                 return -EINVAL;
1648         for (idx = 1; idx >= 0; --idx) {
1649                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1650                 struct snd_pcm_runtime *runtime;
1651                 if (substream == NULL)
1652                         continue;
1653                 runtime = substream->runtime;
1654                 if (runtime->oss.channels != channels) {
1655                         runtime->oss.params = 1;
1656                         runtime->oss.channels = channels;
1657                 }
1658         }
1659         return snd_pcm_oss_get_channels(pcm_oss_file);
1660 }
1661
1662 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1663 {
1664         struct snd_pcm_substream *substream;
1665         int err;
1666
1667         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1668                 return err;
1669         return substream->runtime->oss.channels;
1670 }
1671
1672 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1673 {
1674         struct snd_pcm_substream *substream;
1675         int err;
1676
1677         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1678                 return err;
1679         return substream->runtime->oss.period_bytes;
1680 }
1681
1682 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1683 {
1684         struct snd_pcm_substream *substream;
1685         int err;
1686         int direct;
1687         struct snd_pcm_hw_params *params;
1688         unsigned int formats = 0;
1689         struct snd_mask format_mask;
1690         int fmt;
1691
1692         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1693                 return err;
1694         if (atomic_read(&substream->mmap_count))
1695                 direct = 1;
1696         else
1697                 direct = substream->oss.setup.direct;
1698         if (!direct)
1699                 return AFMT_MU_LAW | AFMT_U8 |
1700                        AFMT_S16_LE | AFMT_S16_BE |
1701                        AFMT_S8 | AFMT_U16_LE |
1702                        AFMT_U16_BE;
1703         params = kmalloc(sizeof(*params), GFP_KERNEL);
1704         if (!params)
1705                 return -ENOMEM;
1706         _snd_pcm_hw_params_any(params);
1707         err = snd_pcm_hw_refine(substream, params);
1708         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1709         kfree(params);
1710         snd_assert(err >= 0, return err);
1711         for (fmt = 0; fmt < 32; ++fmt) {
1712                 if (snd_mask_test(&format_mask, fmt)) {
1713                         int f = snd_pcm_oss_format_to(fmt);
1714                         if (f >= 0)
1715                                 formats |= f;
1716                 }
1717         }
1718         return formats;
1719 }
1720
1721 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1722 {
1723         int formats, idx;
1724
1725         if (format != AFMT_QUERY) {
1726                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1727                 if (formats < 0)
1728                         return formats;
1729                 if (!(formats & format))
1730                         format = AFMT_U8;
1731                 for (idx = 1; idx >= 0; --idx) {
1732                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1733                         struct snd_pcm_runtime *runtime;
1734                         if (substream == NULL)
1735                                 continue;
1736                         runtime = substream->runtime;
1737                         if (runtime->oss.format != format) {
1738                                 runtime->oss.params = 1;
1739                                 runtime->oss.format = format;
1740                         }
1741                 }
1742         }
1743         return snd_pcm_oss_get_format(pcm_oss_file);
1744 }
1745
1746 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1747 {
1748         struct snd_pcm_substream *substream;
1749         int err;
1750
1751         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1752                 return err;
1753         return substream->runtime->oss.format;
1754 }
1755
1756 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1757 {
1758         struct snd_pcm_runtime *runtime;
1759
1760         if (substream == NULL)
1761                 return 0;
1762         runtime = substream->runtime;
1763         if (subdivide == 0) {
1764                 subdivide = runtime->oss.subdivision;
1765                 if (subdivide == 0)
1766                         subdivide = 1;
1767                 return subdivide;
1768         }
1769         if (runtime->oss.subdivision || runtime->oss.fragshift)
1770                 return -EINVAL;
1771         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1772             subdivide != 8 && subdivide != 16)
1773                 return -EINVAL;
1774         runtime->oss.subdivision = subdivide;
1775         runtime->oss.params = 1;
1776         return subdivide;
1777 }
1778
1779 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1780 {
1781         int err = -EINVAL, idx;
1782
1783         for (idx = 1; idx >= 0; --idx) {
1784                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1785                 if (substream == NULL)
1786                         continue;
1787                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1788                         return err;
1789         }
1790         return err;
1791 }
1792
1793 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1794 {
1795         struct snd_pcm_runtime *runtime;
1796
1797         if (substream == NULL)
1798                 return 0;
1799         runtime = substream->runtime;
1800         if (runtime->oss.subdivision || runtime->oss.fragshift)
1801                 return -EINVAL;
1802         runtime->oss.fragshift = val & 0xffff;
1803         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1804         if (runtime->oss.fragshift < 4)         /* < 16 */
1805                 runtime->oss.fragshift = 4;
1806         if (runtime->oss.maxfrags < 2)
1807                 runtime->oss.maxfrags = 2;
1808         runtime->oss.params = 1;
1809         return 0;
1810 }
1811
1812 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1813 {
1814         int err = -EINVAL, idx;
1815
1816         for (idx = 1; idx >= 0; --idx) {
1817                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1818                 if (substream == NULL)
1819                         continue;
1820                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1821                         return err;
1822         }
1823         return err;
1824 }
1825
1826 static int snd_pcm_oss_nonblock(struct file * file)
1827 {
1828         file->f_flags |= O_NONBLOCK;
1829         return 0;
1830 }
1831
1832 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1833 {
1834
1835         if (substream == NULL) {
1836                 res &= ~DSP_CAP_DUPLEX;
1837                 return res;
1838         }
1839 #ifdef DSP_CAP_MULTI
1840         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1841                 if (substream->pstr->substream_count > 1)
1842                         res |= DSP_CAP_MULTI;
1843 #endif
1844         /* DSP_CAP_REALTIME is set all times: */
1845         /* all ALSA drivers can return actual pointer in ring buffer */
1846 #if defined(DSP_CAP_REALTIME) && 0
1847         {
1848                 struct snd_pcm_runtime *runtime = substream->runtime;
1849                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1850                         res &= ~DSP_CAP_REALTIME;
1851         }
1852 #endif
1853         return res;
1854 }
1855
1856 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1857 {
1858         int result, idx;
1859
1860         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1861         for (idx = 0; idx < 2; idx++) {
1862                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1863                 result = snd_pcm_oss_get_caps1(substream, result);
1864         }
1865         result |= 0x0001;       /* revision - same as SB AWE 64 */
1866         return result;
1867 }
1868
1869 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1870 {
1871         struct snd_pcm_runtime *runtime = substream->runtime;
1872         snd_pcm_uframes_t appl_ptr;
1873         appl_ptr = hw_ptr + runtime->buffer_size;
1874         appl_ptr %= runtime->boundary;
1875         runtime->control->appl_ptr = appl_ptr;
1876 }
1877
1878 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1879 {
1880         struct snd_pcm_runtime *runtime;
1881         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1882         int err, cmd;
1883
1884 #ifdef OSS_DEBUG
1885         printk("pcm_oss: trigger = 0x%x\n", trigger);
1886 #endif
1887
1888         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1889         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1890
1891         if (psubstream) {
1892                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1893                         return err;
1894         }
1895         if (csubstream) {
1896                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1897                         return err;
1898         }
1899         if (psubstream) {
1900                 runtime = psubstream->runtime;
1901                 if (trigger & PCM_ENABLE_OUTPUT) {
1902                         if (runtime->oss.trigger)
1903                                 goto _skip1;
1904                         if (atomic_read(&psubstream->mmap_count))
1905                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1906                         runtime->oss.trigger = 1;
1907                         runtime->start_threshold = 1;
1908                         cmd = SNDRV_PCM_IOCTL_START;
1909                 } else {
1910                         if (!runtime->oss.trigger)
1911                                 goto _skip1;
1912                         runtime->oss.trigger = 0;
1913                         runtime->start_threshold = runtime->boundary;
1914                         cmd = SNDRV_PCM_IOCTL_DROP;
1915                         runtime->oss.prepare = 1;
1916                 }
1917                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1918                 if (err < 0)
1919                         return err;
1920         }
1921  _skip1:
1922         if (csubstream) {
1923                 runtime = csubstream->runtime;
1924                 if (trigger & PCM_ENABLE_INPUT) {
1925                         if (runtime->oss.trigger)
1926                                 goto _skip2;
1927                         runtime->oss.trigger = 1;
1928                         runtime->start_threshold = 1;
1929                         cmd = SNDRV_PCM_IOCTL_START;
1930                 } else {
1931                         if (!runtime->oss.trigger)
1932                                 goto _skip2;
1933                         runtime->oss.trigger = 0;
1934                         runtime->start_threshold = runtime->boundary;
1935                         cmd = SNDRV_PCM_IOCTL_DROP;
1936                         runtime->oss.prepare = 1;
1937                 }
1938                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1939                 if (err < 0)
1940                         return err;
1941         }
1942  _skip2:
1943         return 0;
1944 }
1945
1946 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1947 {
1948         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1949         int result = 0;
1950
1951         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1952         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1953         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1954                 result |= PCM_ENABLE_OUTPUT;
1955         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1956                 result |= PCM_ENABLE_INPUT;
1957         return result;
1958 }
1959
1960 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1961 {
1962         struct snd_pcm_substream *substream;
1963         struct snd_pcm_runtime *runtime;
1964         snd_pcm_sframes_t delay;
1965         int err;
1966
1967         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1968         if (substream == NULL)
1969                 return -EINVAL;
1970         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1971                 return err;
1972         runtime = substream->runtime;
1973         if (runtime->oss.params || runtime->oss.prepare)
1974                 return 0;
1975         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1976         if (err == -EPIPE)
1977                 delay = 0;      /* hack for broken OSS applications */
1978         else if (err < 0)
1979                 return err;
1980         return snd_pcm_oss_bytes(substream, delay);
1981 }
1982
1983 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1984 {
1985         struct snd_pcm_substream *substream;
1986         struct snd_pcm_runtime *runtime;
1987         snd_pcm_sframes_t delay;
1988         int fixup;
1989         struct count_info info;
1990         int err;
1991
1992         if (_info == NULL)
1993                 return -EFAULT;
1994         substream = pcm_oss_file->streams[stream];
1995         if (substream == NULL)
1996                 return -EINVAL;
1997         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1998                 return err;
1999         runtime = substream->runtime;
2000         if (runtime->oss.params || runtime->oss.prepare) {
2001                 memset(&info, 0, sizeof(info));
2002                 if (copy_to_user(_info, &info, sizeof(info)))
2003                         return -EFAULT;
2004                 return 0;
2005         }
2006         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2007                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2008                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2009                         err = 0;
2010                         delay = 0;
2011                         fixup = 0;
2012                 } else {
2013                         fixup = runtime->oss.buffer_used;
2014                 }
2015         } else {
2016                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2017                 fixup = -runtime->oss.buffer_used;
2018         }
2019         if (err < 0)
2020                 return err;
2021         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2022         if (atomic_read(&substream->mmap_count)) {
2023                 snd_pcm_sframes_t n;
2024                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2025                 if (n < 0)
2026                         n += runtime->boundary;
2027                 info.blocks = n / runtime->period_size;
2028                 runtime->oss.prev_hw_ptr_interrupt = delay;
2029                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2030                         snd_pcm_oss_simulate_fill(substream, delay);
2031                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2032         } else {
2033                 delay = snd_pcm_oss_bytes(substream, delay);
2034                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2035                         if (substream->oss.setup.buggyptr)
2036                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2037                         else
2038                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2039                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2040                 } else {
2041                         delay += fixup;
2042                         info.blocks = delay / runtime->oss.period_bytes;
2043                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2044                 }
2045         }
2046         if (copy_to_user(_info, &info, sizeof(info)))
2047                 return -EFAULT;
2048         return 0;
2049 }
2050
2051 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2052 {
2053         struct snd_pcm_substream *substream;
2054         struct snd_pcm_runtime *runtime;
2055         snd_pcm_sframes_t avail;
2056         int fixup;
2057         struct audio_buf_info info;
2058         int err;
2059
2060         if (_info == NULL)
2061                 return -EFAULT;
2062         substream = pcm_oss_file->streams[stream];
2063         if (substream == NULL)
2064                 return -EINVAL;
2065         runtime = substream->runtime;
2066
2067         if (runtime->oss.params &&
2068             (err = snd_pcm_oss_change_params(substream)) < 0)
2069                 return err;
2070
2071         info.fragsize = runtime->oss.period_bytes;
2072         info.fragstotal = runtime->periods;
2073         if (runtime->oss.prepare) {
2074                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2075                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2076                         info.fragments = runtime->oss.periods;
2077                 } else {
2078                         info.bytes = 0;
2079                         info.fragments = 0;
2080                 }
2081         } else {
2082                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2083                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2084                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2085                                 avail = runtime->buffer_size;
2086                                 err = 0;
2087                                 fixup = 0;
2088                         } else {
2089                                 avail = runtime->buffer_size - avail;
2090                                 fixup = -runtime->oss.buffer_used;
2091                         }
2092                 } else {
2093                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2094                         fixup = runtime->oss.buffer_used;
2095                 }
2096                 if (err < 0)
2097                         return err;
2098                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2099                 info.fragments = info.bytes / runtime->oss.period_bytes;
2100         }
2101
2102 #ifdef OSS_DEBUG
2103         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2104 #endif
2105         if (copy_to_user(_info, &info, sizeof(info)))
2106                 return -EFAULT;
2107         return 0;
2108 }
2109
2110 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2111 {
2112         // it won't be probably implemented
2113         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2114         return -EINVAL;
2115 }
2116
2117 static const char *strip_task_path(const char *path)
2118 {
2119         const char *ptr, *ptrl = NULL;
2120         for (ptr = path; *ptr; ptr++) {
2121                 if (*ptr == '/')
2122                         ptrl = ptr + 1;
2123         }
2124         return ptrl;
2125 }
2126
2127 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2128                                       const char *task_name,
2129                                       struct snd_pcm_oss_setup *rsetup)
2130 {
2131         struct snd_pcm_oss_setup *setup;
2132
2133         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2134         do {
2135                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2136                      setup = setup->next) {
2137                         if (!strcmp(setup->task_name, task_name))
2138                                 goto out;
2139                 }
2140         } while ((task_name = strip_task_path(task_name)) != NULL);
2141  out:
2142         if (setup)
2143                 *rsetup = *setup;
2144         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2145 }
2146
2147 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2148 {
2149         struct snd_pcm_runtime *runtime;
2150         runtime = substream->runtime;
2151         vfree(runtime->oss.buffer);
2152         runtime->oss.buffer = NULL;
2153 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2154         snd_pcm_oss_plugin_clear(substream);
2155 #endif
2156         substream->oss.oss = 0;
2157 }
2158
2159 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2160                                        struct snd_pcm_oss_setup *setup,
2161                                        int minor)
2162 {
2163         struct snd_pcm_runtime *runtime;
2164
2165         substream->oss.oss = 1;
2166         substream->oss.setup = *setup;
2167         if (setup->nonblock)
2168                 substream->f_flags |= O_NONBLOCK;
2169         else if (setup->block)
2170                 substream->f_flags &= ~O_NONBLOCK;
2171         runtime = substream->runtime;
2172         runtime->oss.params = 1;
2173         runtime->oss.trigger = 1;
2174         runtime->oss.rate = 8000;
2175         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2176         case SNDRV_MINOR_OSS_PCM_8:
2177                 runtime->oss.format = AFMT_U8;
2178                 break;
2179         case SNDRV_MINOR_OSS_PCM_16:
2180                 runtime->oss.format = AFMT_S16_LE;
2181                 break;
2182         default:
2183                 runtime->oss.format = AFMT_MU_LAW;
2184         }
2185         runtime->oss.channels = 1;
2186         runtime->oss.fragshift = 0;
2187         runtime->oss.maxfrags = 0;
2188         runtime->oss.subdivision = 0;
2189         substream->pcm_release = snd_pcm_oss_release_substream;
2190 }
2191
2192 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2193 {
2194         int cidx;
2195         snd_assert(pcm_oss_file != NULL, return -ENXIO);
2196         for (cidx = 0; cidx < 2; ++cidx) {
2197                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2198                 if (substream)
2199                         snd_pcm_release_substream(substream);
2200         }
2201         kfree(pcm_oss_file);
2202         return 0;
2203 }
2204
2205 static int snd_pcm_oss_open_file(struct file *file,
2206                                  struct snd_pcm *pcm,
2207                                  struct snd_pcm_oss_file **rpcm_oss_file,
2208                                  int minor,
2209                                  struct snd_pcm_oss_setup *setup)
2210 {
2211         int idx, err;
2212         struct snd_pcm_oss_file *pcm_oss_file;
2213         struct snd_pcm_substream *substream;
2214         unsigned int f_mode = file->f_mode;
2215
2216         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2217         *rpcm_oss_file = NULL;
2218
2219         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2220         if (pcm_oss_file == NULL)
2221                 return -ENOMEM;
2222
2223         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2224             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2225                 f_mode = FMODE_WRITE;
2226
2227         file->f_flags &= ~O_APPEND;
2228         for (idx = 0; idx < 2; idx++) {
2229                 if (setup[idx].disable)
2230                         continue;
2231                 if (! pcm->streams[idx].substream_count)
2232                         continue; /* no matching substream */
2233                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2234                         if (! (f_mode & FMODE_WRITE))
2235                                 continue;
2236                 } else {
2237                         if (! (f_mode & FMODE_READ))
2238                                 continue;
2239                 }
2240                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2241                 if (err < 0) {
2242                         snd_pcm_oss_release_file(pcm_oss_file);
2243                         return err;
2244                 }
2245
2246                 pcm_oss_file->streams[idx] = substream;
2247                 substream->file = pcm_oss_file;
2248                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2249         }
2250
2251         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2252                 snd_pcm_oss_release_file(pcm_oss_file);
2253                 return -EINVAL;
2254         }
2255
2256         file->private_data = pcm_oss_file;
2257         *rpcm_oss_file = pcm_oss_file;
2258         return 0;
2259 }
2260
2261
2262 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2263 {
2264         unsigned int idx;
2265
2266         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2267         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2268                 name[idx] = task->comm[idx];
2269         name[idx] = '\0';
2270         return 0;
2271 }
2272
2273 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2274 {
2275         int err;
2276         char task_name[32];
2277         struct snd_pcm *pcm;
2278         struct snd_pcm_oss_file *pcm_oss_file;
2279         struct snd_pcm_oss_setup setup[2];
2280         int nonblock;
2281         wait_queue_t wait;
2282
2283         pcm = snd_lookup_oss_minor_data(iminor(inode),
2284                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2285         if (pcm == NULL) {
2286                 err = -ENODEV;
2287                 goto __error1;
2288         }
2289         err = snd_card_file_add(pcm->card, file);
2290         if (err < 0)
2291                 goto __error1;
2292         if (!try_module_get(pcm->card->module)) {
2293                 err = -EFAULT;
2294                 goto __error2;
2295         }
2296         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2297                 err = -EFAULT;
2298                 goto __error;
2299         }
2300         memset(setup, 0, sizeof(setup));
2301         if (file->f_mode & FMODE_WRITE)
2302                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2303                                            task_name, &setup[0]);
2304         if (file->f_mode & FMODE_READ)
2305                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2306                                            task_name, &setup[1]);
2307
2308         nonblock = !!(file->f_flags & O_NONBLOCK);
2309         if (!nonblock)
2310                 nonblock = nonblock_open;
2311
2312         init_waitqueue_entry(&wait, current);
2313         add_wait_queue(&pcm->open_wait, &wait);
2314         mutex_lock(&pcm->open_mutex);
2315         while (1) {
2316                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2317                                             iminor(inode), setup);
2318                 if (err >= 0)
2319                         break;
2320                 if (err == -EAGAIN) {
2321                         if (nonblock) {
2322                                 err = -EBUSY;
2323                                 break;
2324                         }
2325                 } else
2326                         break;
2327                 set_current_state(TASK_INTERRUPTIBLE);
2328                 mutex_unlock(&pcm->open_mutex);
2329                 schedule();
2330                 mutex_lock(&pcm->open_mutex);
2331                 if (signal_pending(current)) {
2332                         err = -ERESTARTSYS;
2333                         break;
2334                 }
2335         }
2336         remove_wait_queue(&pcm->open_wait, &wait);
2337         mutex_unlock(&pcm->open_mutex);
2338         if (err < 0)
2339                 goto __error;
2340         return err;
2341
2342       __error:
2343         module_put(pcm->card->module);
2344       __error2:
2345         snd_card_file_remove(pcm->card, file);
2346       __error1:
2347         return err;
2348 }
2349
2350 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2351 {
2352         struct snd_pcm *pcm;
2353         struct snd_pcm_substream *substream;
2354         struct snd_pcm_oss_file *pcm_oss_file;
2355
2356         pcm_oss_file = file->private_data;
2357         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2358         if (substream == NULL)
2359                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2360         snd_assert(substream != NULL, return -ENXIO);
2361         pcm = substream->pcm;
2362         snd_pcm_oss_sync(pcm_oss_file);
2363         mutex_lock(&pcm->open_mutex);
2364         snd_pcm_oss_release_file(pcm_oss_file);
2365         mutex_unlock(&pcm->open_mutex);
2366         wake_up(&pcm->open_wait);
2367         module_put(pcm->card->module);
2368         snd_card_file_remove(pcm->card, file);
2369         return 0;
2370 }
2371
2372 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2373 {
2374         struct snd_pcm_oss_file *pcm_oss_file;
2375         int __user *p = (int __user *)arg;
2376         int res;
2377
2378         pcm_oss_file = file->private_data;
2379         if (cmd == OSS_GETVERSION)
2380                 return put_user(SNDRV_OSS_VERSION, p);
2381         if (cmd == OSS_ALSAEMULVER)
2382                 return put_user(1, p);
2383 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2384         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2385                 struct snd_pcm_substream *substream;
2386                 int idx;
2387                 for (idx = 0; idx < 2; ++idx) {
2388                         substream = pcm_oss_file->streams[idx];
2389                         if (substream != NULL)
2390                                 break;
2391                 }
2392                 snd_assert(substream != NULL, return -ENXIO);
2393                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2394         }
2395 #endif
2396         if (((cmd >> 8) & 0xff) != 'P')
2397                 return -EINVAL;
2398 #ifdef OSS_DEBUG
2399         printk("pcm_oss: ioctl = 0x%x\n", cmd);
2400 #endif
2401         switch (cmd) {
2402         case SNDCTL_DSP_RESET:
2403                 return snd_pcm_oss_reset(pcm_oss_file);
2404         case SNDCTL_DSP_SYNC:
2405                 return snd_pcm_oss_sync(pcm_oss_file);
2406         case SNDCTL_DSP_SPEED:
2407                 if (get_user(res, p))
2408                         return -EFAULT;
2409                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2410                         return res;
2411                 return put_user(res, p);
2412         case SOUND_PCM_READ_RATE:
2413                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2414                 if (res < 0)
2415                         return res;
2416                 return put_user(res, p);
2417         case SNDCTL_DSP_STEREO:
2418                 if (get_user(res, p))
2419                         return -EFAULT;
2420                 res = res > 0 ? 2 : 1;
2421                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2422                         return res;
2423                 return put_user(--res, p);
2424         case SNDCTL_DSP_GETBLKSIZE:
2425                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2426                 if (res < 0)
2427                         return res;
2428                 return put_user(res, p);
2429         case SNDCTL_DSP_SETFMT:
2430                 if (get_user(res, p))
2431                         return -EFAULT;
2432                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2433                 if (res < 0)
2434                         return res;
2435                 return put_user(res, p);
2436         case SOUND_PCM_READ_BITS:
2437                 res = snd_pcm_oss_get_format(pcm_oss_file);
2438                 if (res < 0)
2439                         return res;
2440                 return put_user(res, p);
2441         case SNDCTL_DSP_CHANNELS:
2442                 if (get_user(res, p))
2443                         return -EFAULT;
2444                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2445                 if (res < 0)
2446                         return res;
2447                 return put_user(res, p);
2448         case SOUND_PCM_READ_CHANNELS:
2449                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2450                 if (res < 0)
2451                         return res;
2452                 return put_user(res, p);
2453         case SOUND_PCM_WRITE_FILTER:
2454         case SOUND_PCM_READ_FILTER:
2455                 return -EIO;
2456         case SNDCTL_DSP_POST:
2457                 return snd_pcm_oss_post(pcm_oss_file);
2458         case SNDCTL_DSP_SUBDIVIDE:
2459                 if (get_user(res, p))
2460                         return -EFAULT;
2461                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2462                 if (res < 0)
2463                         return res;
2464                 return put_user(res, p);
2465         case SNDCTL_DSP_SETFRAGMENT:
2466                 if (get_user(res, p))
2467                         return -EFAULT;
2468                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2469         case SNDCTL_DSP_GETFMTS:
2470                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2471                 if (res < 0)
2472                         return res;
2473                 return put_user(res, p);
2474         case SNDCTL_DSP_GETOSPACE:
2475         case SNDCTL_DSP_GETISPACE:
2476                 return snd_pcm_oss_get_space(pcm_oss_file,
2477                         cmd == SNDCTL_DSP_GETISPACE ?
2478                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2479                         (struct audio_buf_info __user *) arg);
2480         case SNDCTL_DSP_NONBLOCK:
2481                 return snd_pcm_oss_nonblock(file);
2482         case SNDCTL_DSP_GETCAPS:
2483                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2484                 if (res < 0)
2485                         return res;
2486                 return put_user(res, p);
2487         case SNDCTL_DSP_GETTRIGGER:
2488                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2489                 if (res < 0)
2490                         return res;
2491                 return put_user(res, p);
2492         case SNDCTL_DSP_SETTRIGGER:
2493                 if (get_user(res, p))
2494                         return -EFAULT;
2495                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2496         case SNDCTL_DSP_GETIPTR:
2497         case SNDCTL_DSP_GETOPTR:
2498                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2499                         cmd == SNDCTL_DSP_GETIPTR ?
2500                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2501                         (struct count_info __user *) arg);
2502         case SNDCTL_DSP_MAPINBUF:
2503         case SNDCTL_DSP_MAPOUTBUF:
2504                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2505                         cmd == SNDCTL_DSP_MAPINBUF ?
2506                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2507                         (struct buffmem_desc __user *) arg);
2508         case SNDCTL_DSP_SETSYNCRO:
2509                 /* stop DMA now.. */
2510                 return 0;
2511         case SNDCTL_DSP_SETDUPLEX:
2512                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2513                         return 0;
2514                 return -EIO;
2515         case SNDCTL_DSP_GETODELAY:
2516                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2517                 if (res < 0) {
2518                         /* it's for sure, some broken apps don't check for error codes */
2519                         put_user(0, p);
2520                         return res;
2521                 }
2522                 return put_user(res, p);
2523         case SNDCTL_DSP_PROFILE:
2524                 return 0;       /* silently ignore */
2525         default:
2526                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2527         }
2528         return -EINVAL;
2529 }
2530
2531 #ifdef CONFIG_COMPAT
2532 /* all compatible */
2533 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2534 #else
2535 #define snd_pcm_oss_ioctl_compat        NULL
2536 #endif
2537
2538 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2539 {
2540         struct snd_pcm_oss_file *pcm_oss_file;
2541         struct snd_pcm_substream *substream;
2542
2543         pcm_oss_file = file->private_data;
2544         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2545         if (substream == NULL)
2546                 return -ENXIO;
2547         substream->f_flags = file->f_flags & O_NONBLOCK;
2548 #ifndef OSS_DEBUG
2549         return snd_pcm_oss_read1(substream, buf, count);
2550 #else
2551         {
2552                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2553                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2554                 return res;
2555         }
2556 #endif
2557 }
2558
2559 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2560 {
2561         struct snd_pcm_oss_file *pcm_oss_file;
2562         struct snd_pcm_substream *substream;
2563         long result;
2564
2565         pcm_oss_file = file->private_data;
2566         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2567         if (substream == NULL)
2568                 return -ENXIO;
2569         substream->f_flags = file->f_flags & O_NONBLOCK;
2570         result = snd_pcm_oss_write1(substream, buf, count);
2571 #ifdef OSS_DEBUG
2572         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2573 #endif
2574         return result;
2575 }
2576
2577 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2578 {
2579         struct snd_pcm_runtime *runtime = substream->runtime;
2580         if (atomic_read(&substream->mmap_count))
2581                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2582         else
2583                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2584 }
2585
2586 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2587 {
2588         struct snd_pcm_runtime *runtime = substream->runtime;
2589         if (atomic_read(&substream->mmap_count))
2590                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2591         else
2592                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2593 }
2594
2595 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2596 {
2597         struct snd_pcm_oss_file *pcm_oss_file;
2598         unsigned int mask;
2599         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2600
2601         pcm_oss_file = file->private_data;
2602
2603         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2604         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2605
2606         mask = 0;
2607         if (psubstream != NULL) {
2608                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2609                 poll_wait(file, &runtime->sleep, wait);
2610                 snd_pcm_stream_lock_irq(psubstream);
2611                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2612                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2613                      snd_pcm_oss_playback_ready(psubstream)))
2614                         mask |= POLLOUT | POLLWRNORM;
2615                 snd_pcm_stream_unlock_irq(psubstream);
2616         }
2617         if (csubstream != NULL) {
2618                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2619                 snd_pcm_state_t ostate;
2620                 poll_wait(file, &runtime->sleep, wait);
2621                 snd_pcm_stream_lock_irq(csubstream);
2622                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2623                     snd_pcm_oss_capture_ready(csubstream))
2624                         mask |= POLLIN | POLLRDNORM;
2625                 snd_pcm_stream_unlock_irq(csubstream);
2626                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2627                         struct snd_pcm_oss_file ofile;
2628                         memset(&ofile, 0, sizeof(ofile));
2629                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2630                         runtime->oss.trigger = 0;
2631                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2632                 }
2633         }
2634
2635         return mask;
2636 }
2637
2638 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2639 {
2640         struct snd_pcm_oss_file *pcm_oss_file;
2641         struct snd_pcm_substream *substream = NULL;
2642         struct snd_pcm_runtime *runtime;
2643         int err;
2644
2645 #ifdef OSS_DEBUG
2646         printk("pcm_oss: mmap begin\n");
2647 #endif
2648         pcm_oss_file = file->private_data;
2649         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2650         case VM_READ | VM_WRITE:
2651                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2652                 if (substream)
2653                         break;
2654                 /* Fall through */
2655         case VM_READ:
2656                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2657                 break;
2658         case VM_WRITE:
2659                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2660                 break;
2661         default:
2662                 return -EINVAL;
2663         }
2664         /* set VM_READ access as well to fix memset() routines that do
2665            reads before writes (to improve performance) */
2666         area->vm_flags |= VM_READ;
2667         if (substream == NULL)
2668                 return -ENXIO;
2669         runtime = substream->runtime;
2670         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2671                 return -EIO;
2672         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2673                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2674         else
2675                 return -EIO;
2676
2677         if (runtime->oss.params) {
2678                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2679                         return err;
2680         }
2681 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2682         if (runtime->oss.plugin_first != NULL)
2683                 return -EIO;
2684 #endif
2685
2686         if (area->vm_pgoff != 0)
2687                 return -EINVAL;
2688
2689         err = snd_pcm_mmap_data(substream, file, area);
2690         if (err < 0)
2691                 return err;
2692         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2693         runtime->silence_threshold = 0;
2694         runtime->silence_size = 0;
2695 #ifdef OSS_DEBUG
2696         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2697 #endif
2698         /* In mmap mode we never stop */
2699         runtime->stop_threshold = runtime->boundary;
2700
2701         return 0;
2702 }
2703
2704 #ifdef CONFIG_SND_VERBOSE_PROCFS
2705 /*
2706  *  /proc interface
2707  */
2708
2709 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2710                                   struct snd_info_buffer *buffer)
2711 {
2712         struct snd_pcm_str *pstr = entry->private_data;
2713         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2714         mutex_lock(&pstr->oss.setup_mutex);
2715         while (setup) {
2716                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2717                             setup->task_name,
2718                             setup->periods,
2719                             setup->period_size,
2720                             setup->disable ? " disable" : "",
2721                             setup->direct ? " direct" : "",
2722                             setup->block ? " block" : "",
2723                             setup->nonblock ? " non-block" : "",
2724                             setup->partialfrag ? " partial-frag" : "",
2725                             setup->nosilence ? " no-silence" : "");
2726                 setup = setup->next;
2727         }
2728         mutex_unlock(&pstr->oss.setup_mutex);
2729 }
2730
2731 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2732 {
2733         struct snd_pcm_oss_setup *setup, *setupn;
2734
2735         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2736              setup; setup = setupn) {
2737                 setupn = setup->next;
2738                 kfree(setup->task_name);
2739                 kfree(setup);
2740         }
2741         pstr->oss.setup_list = NULL;
2742 }
2743
2744 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2745                                    struct snd_info_buffer *buffer)
2746 {
2747         struct snd_pcm_str *pstr = entry->private_data;
2748         char line[128], str[32], task_name[32], *ptr;
2749         int idx1;
2750         struct snd_pcm_oss_setup *setup, *setup1, template;
2751
2752         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2753                 mutex_lock(&pstr->oss.setup_mutex);
2754                 memset(&template, 0, sizeof(template));
2755                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2756                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2757                         snd_pcm_oss_proc_free_setup_list(pstr);
2758                         mutex_unlock(&pstr->oss.setup_mutex);
2759                         continue;
2760                 }
2761                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2762                         if (!strcmp(setup->task_name, task_name)) {
2763                                 template = *setup;
2764                                 break;
2765                         }
2766                 }
2767                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2768                 template.periods = simple_strtoul(str, NULL, 10);
2769                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2770                 template.period_size = simple_strtoul(str, NULL, 10);
2771                 for (idx1 = 31; idx1 >= 0; idx1--)
2772                         if (template.period_size & (1 << idx1))
2773                                 break;
2774                 for (idx1--; idx1 >= 0; idx1--)
2775                         template.period_size &= ~(1 << idx1);
2776                 do {
2777                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2778                         if (!strcmp(str, "disable")) {
2779                                 template.disable = 1;
2780                         } else if (!strcmp(str, "direct")) {
2781                                 template.direct = 1;
2782                         } else if (!strcmp(str, "block")) {
2783                                 template.block = 1;
2784                         } else if (!strcmp(str, "non-block")) {
2785                                 template.nonblock = 1;
2786                         } else if (!strcmp(str, "partial-frag")) {
2787                                 template.partialfrag = 1;
2788                         } else if (!strcmp(str, "no-silence")) {
2789                                 template.nosilence = 1;
2790                         } else if (!strcmp(str, "buggy-ptr")) {
2791                                 template.buggyptr = 1;
2792                         }
2793                 } while (*str);
2794                 if (setup == NULL) {
2795                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2796                         if (! setup) {
2797                                 buffer->error = -ENOMEM;
2798                                 mutex_lock(&pstr->oss.setup_mutex);
2799                                 return;
2800                         }
2801                         if (pstr->oss.setup_list == NULL)
2802                                 pstr->oss.setup_list = setup;
2803                         else {
2804                                 for (setup1 = pstr->oss.setup_list;
2805                                      setup1->next; setup1 = setup1->next);
2806                                 setup1->next = setup;
2807                         }
2808                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2809                         if (! template.task_name) {
2810                                 kfree(setup);
2811                                 buffer->error = -ENOMEM;
2812                                 mutex_lock(&pstr->oss.setup_mutex);
2813                                 return;
2814                         }
2815                 }
2816                 *setup = template;
2817                 mutex_unlock(&pstr->oss.setup_mutex);
2818         }
2819 }
2820
2821 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2822 {
2823         int stream;
2824         for (stream = 0; stream < 2; ++stream) {
2825                 struct snd_info_entry *entry;
2826                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2827                 if (pstr->substream_count == 0)
2828                         continue;
2829                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2830                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2831                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2832                         entry->c.text.read = snd_pcm_oss_proc_read;
2833                         entry->c.text.write = snd_pcm_oss_proc_write;
2834                         entry->private_data = pstr;
2835                         if (snd_info_register(entry) < 0) {
2836                                 snd_info_free_entry(entry);
2837                                 entry = NULL;
2838                         }
2839                 }
2840                 pstr->oss.proc_entry = entry;
2841         }
2842 }
2843
2844 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2845 {
2846         int stream;
2847         for (stream = 0; stream < 2; ++stream) {
2848                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2849                 snd_info_free_entry(pstr->oss.proc_entry);
2850                 pstr->oss.proc_entry = NULL;
2851                 snd_pcm_oss_proc_free_setup_list(pstr);
2852         }
2853 }
2854 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2855 #define snd_pcm_oss_proc_init(pcm)
2856 #define snd_pcm_oss_proc_done(pcm)
2857 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2858
2859 /*
2860  *  ENTRY functions
2861  */
2862
2863 static struct file_operations snd_pcm_oss_f_reg =
2864 {
2865         .owner =        THIS_MODULE,
2866         .read =         snd_pcm_oss_read,
2867         .write =        snd_pcm_oss_write,
2868         .open =         snd_pcm_oss_open,
2869         .release =      snd_pcm_oss_release,
2870         .poll =         snd_pcm_oss_poll,
2871         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2872         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2873         .mmap =         snd_pcm_oss_mmap,
2874 };
2875
2876 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2877 {
2878         char name[128];
2879         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2880         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2881                                     pcm->card, index, &snd_pcm_oss_f_reg,
2882                                     pcm, name) < 0) {
2883                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2884                            pcm->card->number, pcm->device);
2885         }
2886 }
2887
2888 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2889 {
2890         pcm->oss.reg = 0;
2891         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2892                 char name[128];
2893                 int duplex;
2894                 register_oss_dsp(pcm, 0);
2895                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2896                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2897                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2898                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2899 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2900                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2901                                       pcm->card->number,
2902                                       name);
2903 #endif
2904                 pcm->oss.reg++;
2905                 pcm->oss.reg_mask |= 1;
2906         }
2907         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2908                 register_oss_dsp(pcm, 1);
2909                 pcm->oss.reg++;
2910                 pcm->oss.reg_mask |= 2;
2911         }
2912
2913         if (pcm->oss.reg)
2914                 snd_pcm_oss_proc_init(pcm);
2915
2916         return 0;
2917 }
2918
2919 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2920 {
2921         if (pcm->oss.reg) {
2922                 if (pcm->oss.reg_mask & 1) {
2923                         pcm->oss.reg_mask &= ~1;
2924                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2925                                                   pcm->card, 0);
2926                 }
2927                 if (pcm->oss.reg_mask & 2) {
2928                         pcm->oss.reg_mask &= ~2;
2929                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2930                                                   pcm->card, 1);
2931                 }
2932                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2933 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2934                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2935 #endif
2936                 }
2937                 pcm->oss.reg = 0;
2938         }
2939         return 0;
2940 }
2941
2942 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2943 {
2944         snd_pcm_oss_disconnect_minor(pcm);
2945         snd_pcm_oss_proc_done(pcm);
2946         return 0;
2947 }
2948
2949 static struct snd_pcm_notify snd_pcm_oss_notify =
2950 {
2951         .n_register =   snd_pcm_oss_register_minor,
2952         .n_disconnect = snd_pcm_oss_disconnect_minor,
2953         .n_unregister = snd_pcm_oss_unregister_minor,
2954 };
2955
2956 static int __init alsa_pcm_oss_init(void)
2957 {
2958         int i;
2959         int err;
2960
2961         /* check device map table */
2962         for (i = 0; i < SNDRV_CARDS; i++) {
2963                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2964                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2965                                    i, dsp_map[i]);
2966                         dsp_map[i] = 0;
2967                 }
2968                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2969                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2970                                    i, adsp_map[i]);
2971                         adsp_map[i] = 1;
2972                 }
2973         }
2974         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2975                 return err;
2976         return 0;
2977 }
2978
2979 static void __exit alsa_pcm_oss_exit(void)
2980 {
2981         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2982 }
2983
2984 module_init(alsa_pcm_oss_init)
2985 module_exit(alsa_pcm_oss_exit)