sound/core/oss/pcm_oss.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer / OSS compatible
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #if 0
  23 #define PLUGIN_DEBUG
  24 #endif
  25 #if 0
  26 #define OSS_DEBUG
  27 #endif
  28
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/time.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/module.h>
  34 #include <linux/math64.h>
  35 #include <linux/string.h>
  36 #include <linux/compat.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 #include <sound/mixer_oss.h>
  46
  47 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  48
  49 static int dsp_map[SNDRV_CARDS];
  50 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  51 static bool nonblock_open = 1;
  52
  53 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  54 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  55 MODULE_LICENSE("GPL");
  56 module_param_array(dsp_map, int, NULL, 0444);
  57 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  58 module_param_array(adsp_map, int, NULL, 0444);
  59 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  60 module_param(nonblock_open, bool, 0644);
  61 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  64
  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                 if (max < 0) {
 458                         kfree(save);
 459                         return max;
 460                 }
 461                 last = 1;
 462         }
 463  _end:
 464         kfree(save);
 465         if (last)
 466                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 467         else
 468                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 469         snd_BUG_ON(v < 0);
 470         return v;
 471 }
 472
 473 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 474                                  snd_pcm_hw_param_t var, unsigned int val,
 475                                  int dir)
 476 {
 477         int changed;
 478         if (hw_is_mask(var)) {
 479                 struct snd_mask *m = hw_param_mask(params, var);
 480                 if (val == 0 && dir < 0) {
 481                         changed = -EINVAL;
 482                         snd_mask_none(m);
 483                 } else {
 484                         if (dir > 0)
 485                                 val++;
 486                         else if (dir < 0)
 487                                 val--;
 488                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 489                 }
 490         } else if (hw_is_interval(var)) {
 491                 struct snd_interval *i = hw_param_interval(params, var);
 492                 if (val == 0 && dir < 0) {
 493                         changed = -EINVAL;
 494                         snd_interval_none(i);
 495                 } else if (dir == 0)
 496                         changed = snd_interval_refine_set(i, val);
 497                 else {
 498                         struct snd_interval t;
 499                         t.openmin = 1;
 500                         t.openmax = 1;
 501                         t.empty = 0;
 502                         t.integer = 0;
 503                         if (dir < 0) {
 504                                 t.min = val - 1;
 505                                 t.max = val;
 506                         } else {
 507                                 t.min = val;
 508                                 t.max = val+1;
 509                         }
 510                         changed = snd_interval_refine(i, &t);
 511                 }
 512         } else
 513                 return -EINVAL;
 514         if (changed) {
 515                 params->cmask |= 1 << var;
 516                 params->rmask |= 1 << var;
 517         }
 518         return changed;
 519 }
 520
 521 /**
 522  * snd_pcm_hw_param_set
 523  * @pcm: PCM instance
 524  * @params: the hw_params instance
 525  * @var: parameter to retrieve
 526  * @val: value to set
 527  * @dir: pointer to the direction (-1,0,1) or NULL
 528  *
 529  * Inside configuration space defined by PARAMS remove from PAR all
 530  * values != VAL. Reduce configuration space accordingly.
 531  *  Return VAL or -EINVAL if the configuration space is empty
 532  */
 533 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 534                                 struct snd_pcm_hw_params *params,
 535                                 snd_pcm_hw_param_t var, unsigned int val,
 536                                 int dir)
 537 {
 538         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 539         if (changed < 0)
 540                 return changed;
 541         if (params->rmask) {
 542                 int err = snd_pcm_hw_refine(pcm, params);
 543                 if (err < 0)
 544                         return err;
 545         }
 546         return snd_pcm_hw_param_value(params, var, NULL);
 547 }
 548
 549 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 550                                         snd_pcm_hw_param_t var)
 551 {
 552         int changed;
 553         changed = snd_interval_setinteger(hw_param_interval(params, var));
 554         if (changed) {
 555                 params->cmask |= 1 << var;
 556                 params->rmask |= 1 << var;
 557         }
 558         return changed;
 559 }
 560
 561 /*
 562  * plugin
 563  */
 564
 565 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 566 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 567 {
 568         struct snd_pcm_runtime *runtime = substream->runtime;
 569         struct snd_pcm_plugin *plugin, *next;
 570
 571         plugin = runtime->oss.plugin_first;
 572         while (plugin) {
 573                 next = plugin->next;
 574                 snd_pcm_plugin_free(plugin);
 575                 plugin = next;
 576         }
 577         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 578         return 0;
 579 }
 580
 581 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 582 {
 583         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 584         plugin->next = runtime->oss.plugin_first;
 585         plugin->prev = NULL;
 586         if (runtime->oss.plugin_first) {
 587                 runtime->oss.plugin_first->prev = plugin;
 588                 runtime->oss.plugin_first = plugin;
 589         } else {
 590                 runtime->oss.plugin_last =
 591                 runtime->oss.plugin_first = plugin;
 592         }
 593         return 0;
 594 }
 595
 596 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 597 {
 598         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 599         plugin->next = NULL;
 600         plugin->prev = runtime->oss.plugin_last;
 601         if (runtime->oss.plugin_last) {
 602                 runtime->oss.plugin_last->next = plugin;
 603                 runtime->oss.plugin_last = plugin;
 604         } else {
 605                 runtime->oss.plugin_last =
 606                 runtime->oss.plugin_first = plugin;
 607         }
 608         return 0;
 609 }
 610 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 611
 612 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 613 {
 614         struct snd_pcm_runtime *runtime = substream->runtime;
 615         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 616         long bytes = frames_to_bytes(runtime, frames);
 617         if (buffer_size == runtime->oss.buffer_bytes)
 618                 return bytes;
 619 #if BITS_PER_LONG >= 64
 620         return runtime->oss.buffer_bytes * bytes / buffer_size;
 621 #else
 622         {
 623                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 624                 return div_u64(bsize, buffer_size);
 625         }
 626 #endif
 627 }
 628
 629 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 630 {
 631         struct snd_pcm_runtime *runtime = substream->runtime;
 632         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 633         if (buffer_size == runtime->oss.buffer_bytes)
 634                 return bytes_to_frames(runtime, bytes);
 635         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 636 }
 637
 638 static inline
 639 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
 640 {
 641         return runtime->hw_ptr_interrupt;
 642 }
 643
 644 /* define extended formats in the recent OSS versions (if any) */
 645 /* linear formats */
 646 #define AFMT_S32_LE      0x00001000
 647 #define AFMT_S32_BE      0x00002000
 648 #define AFMT_S24_LE      0x00008000
 649 #define AFMT_S24_BE      0x00010000
 650 #define AFMT_S24_PACKED  0x00040000
 651
 652 /* other supported formats */
 653 #define AFMT_FLOAT       0x00004000
 654 #define AFMT_SPDIF_RAW   0x00020000
 655
 656 /* unsupported formats */
 657 #define AFMT_AC3         0x00000400
 658 #define AFMT_VORBIS      0x00000800
 659
 660 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
 661 {
 662         switch (format) {
 663         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 664         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 665         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 666         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 667         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 668         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 669         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 670         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 671         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 672         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 673         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 674         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 675         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 676         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 677         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 678         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 679         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 680         default:                return SNDRV_PCM_FORMAT_U8;
 681         }
 682 }
 683
 684 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
 685 {
 686         switch (format) {
 687         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 688         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 689         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 690         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 691         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 692         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 693         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 694         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 695         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 696         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 697         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 698         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 699         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 700         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 701         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 702         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 703         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 704         default:                        return -EINVAL;
 705         }
 706 }
 707
 708 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 709                                    struct snd_pcm_hw_params *oss_params,
 710                                    struct snd_pcm_hw_params *slave_params)
 711 {
 712         size_t s;
 713         size_t oss_buffer_size, oss_period_size, oss_periods;
 714         size_t min_period_size, max_period_size;
 715         struct snd_pcm_runtime *runtime = substream->runtime;
 716         size_t oss_frame_size;
 717
 718         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 719                          params_channels(oss_params) / 8;
 720
 721         oss_buffer_size = snd_pcm_plug_client_size(substream,
 722                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 723         oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
 724         if (atomic_read(&substream->mmap_count)) {
 725                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 726                         oss_buffer_size = runtime->oss.mmap_bytes;
 727         }
 728
 729         if (substream->oss.setup.period_size > 16)
 730                 oss_period_size = substream->oss.setup.period_size;
 731         else if (runtime->oss.fragshift) {
 732                 oss_period_size = 1 << runtime->oss.fragshift;
 733                 if (oss_period_size > oss_buffer_size / 2)
 734                         oss_period_size = oss_buffer_size / 2;
 735         } else {
 736                 int sd;
 737                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 738
 739                 oss_period_size = oss_buffer_size;
 740                 do {
 741                         oss_period_size /= 2;
 742                 } while (oss_period_size > bytes_per_sec);
 743                 if (runtime->oss.subdivision == 0) {
 744                         sd = 4;
 745                         if (oss_period_size / sd > 4096)
 746                                 sd *= 2;
 747                         if (oss_period_size / sd < 4096)
 748                                 sd = 1;
 749                 } else
 750                         sd = runtime->oss.subdivision;
 751                 oss_period_size /= sd;
 752                 if (oss_period_size < 16)
 753                         oss_period_size = 16;
 754         }
 755
 756         min_period_size = snd_pcm_plug_client_size(substream,
 757                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 758         min_period_size *= oss_frame_size;
 759         min_period_size = roundup_pow_of_two(min_period_size);
 760         if (oss_period_size < min_period_size)
 761                 oss_period_size = min_period_size;
 762
 763         max_period_size = snd_pcm_plug_client_size(substream,
 764                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 765         max_period_size *= oss_frame_size;
 766         max_period_size = rounddown_pow_of_two(max_period_size);
 767         if (oss_period_size > max_period_size)
 768                 oss_period_size = max_period_size;
 769
 770         oss_periods = oss_buffer_size / oss_period_size;
 771
 772         if (substream->oss.setup.periods > 1)
 773                 oss_periods = substream->oss.setup.periods;
 774
 775         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 776         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 777                 s = runtime->oss.maxfrags;
 778         if (oss_periods > s)
 779                 oss_periods = s;
 780
 781         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 782         if (s < 2)
 783                 s = 2;
 784         if (oss_periods < s)
 785                 oss_periods = s;
 786
 787         while (oss_period_size * oss_periods > oss_buffer_size)
 788                 oss_period_size /= 2;
 789
 790         if (oss_period_size < 16)
 791                 return -EINVAL;
 792         runtime->oss.period_bytes = oss_period_size;
 793         runtime->oss.period_frames = 1;
 794         runtime->oss.periods = oss_periods;
 795         return 0;
 796 }
 797
 798 static int choose_rate(struct snd_pcm_substream *substream,
 799                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 800 {
 801         struct snd_interval *it;
 802         struct snd_pcm_hw_params *save;
 803         unsigned int rate, prev;
 804
 805         save = kmalloc(sizeof(*save), GFP_KERNEL);
 806         if (save == NULL)
 807                 return -ENOMEM;
 808         *save = *params;
 809         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 810
 811         /* try multiples of the best rate */
 812         rate = best_rate;
 813         for (;;) {
 814                 if (it->max < rate || (it->max == rate && it->openmax))
 815                         break;
 816                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 817                         int ret;
 818                         ret = snd_pcm_hw_param_set(substream, params,
 819                                                    SNDRV_PCM_HW_PARAM_RATE,
 820                                                    rate, 0);
 821                         if (ret == (int)rate) {
 822                                 kfree(save);
 823                                 return rate;
 824                         }
 825                         *params = *save;
 826                 }
 827                 prev = rate;
 828                 rate += best_rate;
 829                 if (rate <= prev)
 830                         break;
 831         }
 832
 833         /* not found, use the nearest rate */
 834         kfree(save);
 835         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 836 }
 837
 838 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 839 {
 840         struct snd_pcm_runtime *runtime = substream->runtime;
 841         struct snd_pcm_hw_params *params, *sparams;
 842         struct snd_pcm_sw_params *sw_params;
 843         ssize_t oss_buffer_size, oss_period_size;
 844         size_t oss_frame_size;
 845         int err;
 846         int direct;
 847         snd_pcm_format_t format, sformat;
 848         int n;
 849         struct snd_mask sformat_mask;
 850         struct snd_mask mask;
 851
 852         if (mutex_lock_interruptible(&runtime->oss.params_lock))
 853                 return -EINTR;
 854         sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
 855         params = kmalloc(sizeof(*params), GFP_KERNEL);
 856         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 857         if (!sw_params || !params || !sparams) {
 858                 err = -ENOMEM;
 859                 goto failure;
 860         }
 861
 862         if (atomic_read(&substream->mmap_count))
 863                 direct = 1;
 864         else
 865                 direct = substream->oss.setup.direct;
 866
 867         _snd_pcm_hw_params_any(sparams);
 868         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 869         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 870         snd_mask_none(&mask);
 871         if (atomic_read(&substream->mmap_count))
 872                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 873         else {
 874                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 875                 if (!direct)
 876                         snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 877         }
 878         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 879         if (err < 0) {
 880                 pcm_dbg(substream->pcm, "No usable accesses\n");
 881                 err = -EINVAL;
 882                 goto failure;
 883         }
 884         choose_rate(substream, sparams, runtime->oss.rate);
 885         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 886
 887         format = snd_pcm_oss_format_from(runtime->oss.format);
 888
 889         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 890         if (direct)
 891                 sformat = format;
 892         else
 893                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 894
 895         if ((__force int)sformat < 0 ||
 896             !snd_mask_test(&sformat_mask, (__force int)sformat)) {
 897                 for (sformat = (__force snd_pcm_format_t)0;
 898                      (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
 899                      sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
 900                         if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
 901                             snd_pcm_oss_format_to(sformat) >= 0)
 902                                 break;
 903                 }
 904                 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
 905                         pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
 906                         err = -EINVAL;
 907                         goto failure;
 908                 }
 909         }
 910         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
 911         if (err < 0)
 912                 goto failure;
 913
 914         if (direct) {
 915                 memcpy(params, sparams, sizeof(*params));
 916         } else {
 917                 _snd_pcm_hw_params_any(params);
 918                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 919                                       (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 920                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 921                                       (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
 922                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 923                                       runtime->oss.channels, 0);
 924                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 925                                       runtime->oss.rate, 0);
 926                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 927                          params_access(params), params_format(params),
 928                          params_channels(params), params_rate(params));
 929         }
 930         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 931                  params_access(sparams), params_format(sparams),
 932                  params_channels(sparams), params_rate(sparams));
 933
 934         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 935                          params_channels(params) / 8;
 936
 937 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 938         snd_pcm_oss_plugin_clear(substream);
 939         if (!direct) {
 940                 /* add necessary plugins */
 941                 snd_pcm_oss_plugin_clear(substream);
 942                 if ((err = snd_pcm_plug_format_plugins(substream,
 943                                                        params,
 944                                                        sparams)) < 0) {
 945                         pcm_dbg(substream->pcm,
 946                                 "snd_pcm_plug_format_plugins failed: %i\n", err);
 947                         snd_pcm_oss_plugin_clear(substream);
 948                         goto failure;
 949                 }
 950                 if (runtime->oss.plugin_first) {
 951                         struct snd_pcm_plugin *plugin;
 952                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 953                                 pcm_dbg(substream->pcm,
 954                                         "snd_pcm_plugin_build_io failed: %i\n", err);
 955                                 snd_pcm_oss_plugin_clear(substream);
 956                                 goto failure;
 957                         }
 958                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 959                                 err = snd_pcm_plugin_append(plugin);
 960                         } else {
 961                                 err = snd_pcm_plugin_insert(plugin);
 962                         }
 963                         if (err < 0) {
 964                                 snd_pcm_oss_plugin_clear(substream);
 965                                 goto failure;
 966                         }
 967                 }
 968         }
 969 #endif
 970
 971         err = snd_pcm_oss_period_size(substream, params, sparams);
 972         if (err < 0)
 973                 goto failure;
 974
 975         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 976         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 977         if (err < 0)
 978                 goto failure;
 979
 980         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 981                                      runtime->oss.periods, NULL);
 982         if (err < 0)
 983                 goto failure;
 984
 985         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 986
 987         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 988                 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
 989                 goto failure;
 990         }
 991
 992         if (runtime->oss.trigger) {
 993                 sw_params->start_threshold = 1;
 994         } else {
 995                 sw_params->start_threshold = runtime->boundary;
 996         }
 997         if (atomic_read(&substream->mmap_count) ||
 998             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 999                 sw_params->stop_threshold = runtime->boundary;
1000         else
1001                 sw_params->stop_threshold = runtime->buffer_size;
1002         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1003         sw_params->period_step = 1;
1004         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1005                 1 : runtime->period_size;
1006         if (atomic_read(&substream->mmap_count) ||
1007             substream->oss.setup.nosilence) {
1008                 sw_params->silence_threshold = 0;
1009                 sw_params->silence_size = 0;
1010         } else {
1011                 snd_pcm_uframes_t frames;
1012                 frames = runtime->period_size + 16;
1013                 if (frames > runtime->buffer_size)
1014                         frames = runtime->buffer_size;
1015                 sw_params->silence_threshold = frames;
1016                 sw_params->silence_size = frames;
1017         }
1018
1019         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1020                 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1021                 goto failure;
1022         }
1023
1024         runtime->oss.periods = params_periods(sparams);
1025         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1026         if (oss_period_size < 0) {
1027                 err = -EINVAL;
1028                 goto failure;
1029         }
1030 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1031         if (runtime->oss.plugin_first) {
1032                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1033                 if (err < 0)
1034                         goto failure;
1035         }
1036 #endif
1037         oss_period_size *= oss_frame_size;
1038
1039         oss_buffer_size = oss_period_size * runtime->oss.periods;
1040         if (oss_buffer_size < 0) {
1041                 err = -EINVAL;
1042                 goto failure;
1043         }
1044
1045         runtime->oss.period_bytes = oss_period_size;
1046         runtime->oss.buffer_bytes = oss_buffer_size;
1047
1048         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1049                  runtime->oss.period_bytes,
1050                  runtime->oss.buffer_bytes);
1051         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1052                  params_period_size(sparams),
1053                  params_buffer_size(sparams));
1054
1055         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1056         runtime->oss.channels = params_channels(params);
1057         runtime->oss.rate = params_rate(params);
1058
1059         vfree(runtime->oss.buffer);
1060         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1061         if (!runtime->oss.buffer) {
1062                 err = -ENOMEM;
1063                 goto failure;
1064         }
1065
1066         runtime->oss.params = 0;
1067         runtime->oss.prepare = 1;
1068         runtime->oss.buffer_used = 0;
1069         if (runtime->dma_area)
1070                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1071
1072         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1073
1074         err = 0;
1075 failure:
1076         kfree(sw_params);
1077         kfree(params);
1078         kfree(sparams);
1079         mutex_unlock(&runtime->oss.params_lock);
1080         return err;
1081 }
1082
1083 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1084 {
1085         int idx, err;
1086         struct snd_pcm_substream *asubstream = NULL, *substream;
1087
1088         for (idx = 0; idx < 2; idx++) {
1089                 substream = pcm_oss_file->streams[idx];
1090                 if (substream == NULL)
1091                         continue;
1092                 if (asubstream == NULL)
1093                         asubstream = substream;
1094                 if (substream->runtime->oss.params) {
1095                         err = snd_pcm_oss_change_params(substream);
1096                         if (err < 0)
1097                                 return err;
1098                 }
1099         }
1100         if (!asubstream)
1101                 return -EIO;
1102         if (r_substream)
1103                 *r_substream = asubstream;
1104         return 0;
1105 }
1106
1107 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1108 {
1109         int err;
1110         struct snd_pcm_runtime *runtime = substream->runtime;
1111
1112         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1113         if (err < 0) {
1114                 pcm_dbg(substream->pcm,
1115                         "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1116                 return err;
1117         }
1118         runtime->oss.prepare = 0;
1119         runtime->oss.prev_hw_ptr_period = 0;
1120         runtime->oss.period_ptr = 0;
1121         runtime->oss.buffer_used = 0;
1122
1123         return 0;
1124 }
1125
1126 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1127 {
1128         struct snd_pcm_runtime *runtime;
1129         int err;
1130
1131         if (substream == NULL)
1132                 return 0;
1133         runtime = substream->runtime;
1134         if (runtime->oss.params) {
1135                 err = snd_pcm_oss_change_params(substream);
1136                 if (err < 0)
1137                         return err;
1138         }
1139         if (runtime->oss.prepare) {
1140                 err = snd_pcm_oss_prepare(substream);
1141                 if (err < 0)
1142                         return err;
1143         }
1144         return 0;
1145 }
1146
1147 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1148 {
1149         struct snd_pcm_runtime *runtime;
1150         snd_pcm_uframes_t frames;
1151         int err = 0;
1152
1153         while (1) {
1154                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1155                 if (err < 0)
1156                         break;
1157                 runtime = substream->runtime;
1158                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1159                         break;
1160                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1161                 /* until avail(delay) <= buffer_size */
1162                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1163                 frames /= runtime->period_size;
1164                 frames *= runtime->period_size;
1165                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1166                 if (err < 0)
1167                         break;
1168         }
1169         return err;
1170 }
1171
1172 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1173 {
1174         struct snd_pcm_runtime *runtime = substream->runtime;
1175         int ret;
1176         while (1) {
1177                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1178                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1179 #ifdef OSS_DEBUG
1180                         pcm_dbg(substream->pcm,
1181                                 "pcm_oss: write: recovering from %s\n",
1182                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1183                                 "XRUN" : "SUSPEND");
1184 #endif
1185                         ret = snd_pcm_oss_prepare(substream);
1186                         if (ret < 0)
1187                                 break;
1188                 }
1189                 if (in_kernel) {
1190                         mm_segment_t fs;
1191                         fs = snd_enter_user();
1192                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1193                         snd_leave_user(fs);
1194                 } else {
1195                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1196                 }
1197                 if (ret != -EPIPE && ret != -ESTRPIPE)
1198                         break;
1199                 /* test, if we can't store new data, because the stream */
1200                 /* has not been started */
1201                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202                         return -EAGAIN;
1203         }
1204         return ret;
1205 }
1206
1207 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208 {
1209         struct snd_pcm_runtime *runtime = substream->runtime;
1210         snd_pcm_sframes_t delay;
1211         int ret;
1212         while (1) {
1213                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215 #ifdef OSS_DEBUG
1216                         pcm_dbg(substream->pcm,
1217                                 "pcm_oss: read: recovering from %s\n",
1218                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1219                                 "XRUN" : "SUSPEND");
1220 #endif
1221                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1222                         if (ret < 0)
1223                                 break;
1224                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1225                         ret = snd_pcm_oss_prepare(substream);
1226                         if (ret < 0)
1227                                 break;
1228                 }
1229                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1230                 if (ret < 0)
1231                         break;
1232                 if (in_kernel) {
1233                         mm_segment_t fs;
1234                         fs = snd_enter_user();
1235                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1236                         snd_leave_user(fs);
1237                 } else {
1238                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1239                 }
1240                 if (ret == -EPIPE) {
1241                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1242                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1243                                 if (ret < 0)
1244                                         break;
1245                         }
1246                         continue;
1247                 }
1248                 if (ret != -ESTRPIPE)
1249                         break;
1250         }
1251         return ret;
1252 }
1253
1254 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1255 {
1256         struct snd_pcm_runtime *runtime = substream->runtime;
1257         int ret;
1258         while (1) {
1259                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1260                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1261 #ifdef OSS_DEBUG
1262                         pcm_dbg(substream->pcm,
1263                                 "pcm_oss: writev: recovering from %s\n",
1264                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1265                                 "XRUN" : "SUSPEND");
1266 #endif
1267                         ret = snd_pcm_oss_prepare(substream);
1268                         if (ret < 0)
1269                                 break;
1270                 }
1271                 if (in_kernel) {
1272                         mm_segment_t fs;
1273                         fs = snd_enter_user();
1274                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1275                         snd_leave_user(fs);
1276                 } else {
1277                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1278                 }
1279                 if (ret != -EPIPE && ret != -ESTRPIPE)
1280                         break;
1281
1282                 /* test, if we can't store new data, because the stream */
1283                 /* has not been started */
1284                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1285                         return -EAGAIN;
1286         }
1287         return ret;
1288 }
1289
1290 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1291 {
1292         struct snd_pcm_runtime *runtime = substream->runtime;
1293         int ret;
1294         while (1) {
1295                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1296                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1297 #ifdef OSS_DEBUG
1298                         pcm_dbg(substream->pcm,
1299                                 "pcm_oss: readv: recovering from %s\n",
1300                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1301                                 "XRUN" : "SUSPEND");
1302 #endif
1303                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1304                         if (ret < 0)
1305                                 break;
1306                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1307                         ret = snd_pcm_oss_prepare(substream);
1308                         if (ret < 0)
1309                                 break;
1310                 }
1311                 if (in_kernel) {
1312                         mm_segment_t fs;
1313                         fs = snd_enter_user();
1314                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1315                         snd_leave_user(fs);
1316                 } else {
1317                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1318                 }
1319                 if (ret != -EPIPE && ret != -ESTRPIPE)
1320                         break;
1321         }
1322         return ret;
1323 }
1324
1325 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1326 {
1327         struct snd_pcm_runtime *runtime = substream->runtime;
1328         snd_pcm_sframes_t frames, frames1;
1329 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1330         if (runtime->oss.plugin_first) {
1331                 struct snd_pcm_plugin_channel *channels;
1332                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1333                 if (!in_kernel) {
1334                         if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1335                                 return -EFAULT;
1336                         buf = runtime->oss.buffer;
1337                 }
1338                 frames = bytes / oss_frame_bytes;
1339                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1340                 if (frames1 < 0)
1341                         return frames1;
1342                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1343                 if (frames1 <= 0)
1344                         return frames1;
1345                 bytes = frames1 * oss_frame_bytes;
1346         } else
1347 #endif
1348         {
1349                 frames = bytes_to_frames(runtime, bytes);
1350                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1351                 if (frames1 <= 0)
1352                         return frames1;
1353                 bytes = frames_to_bytes(runtime, frames1);
1354         }
1355         return bytes;
1356 }
1357
1358 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1359 {
1360         size_t xfer = 0;
1361         ssize_t tmp;
1362         struct snd_pcm_runtime *runtime = substream->runtime;
1363
1364         if (atomic_read(&substream->mmap_count))
1365                 return -ENXIO;
1366
1367         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1368                 return tmp;
1369         mutex_lock(&runtime->oss.params_lock);
1370         while (bytes > 0) {
1371                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1372                         tmp = bytes;
1373                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1374                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1375                         if (tmp > 0) {
1376                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1377                                         tmp = -EFAULT;
1378                                         goto err;
1379                                 }
1380                         }
1381                         runtime->oss.buffer_used += tmp;
1382                         buf += tmp;
1383                         bytes -= tmp;
1384                         xfer += tmp;
1385                         if (substream->oss.setup.partialfrag ||
1386                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1387                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1388                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1389                                 if (tmp <= 0)
1390                                         goto err;
1391                                 runtime->oss.bytes += tmp;
1392                                 runtime->oss.period_ptr += tmp;
1393                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1394                                 if (runtime->oss.period_ptr == 0 ||
1395                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1396                                         runtime->oss.buffer_used = 0;
1397                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1398                                         tmp = -EAGAIN;
1399                                         goto err;
1400                                 }
1401                         }
1402                 } else {
1403                         tmp = snd_pcm_oss_write2(substream,
1404                                                  (const char __force *)buf,
1405                                                  runtime->oss.period_bytes, 0);
1406                         if (tmp <= 0)
1407                                 goto err;
1408                         runtime->oss.bytes += tmp;
1409                         buf += tmp;
1410                         bytes -= tmp;
1411                         xfer += tmp;
1412                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1413                             tmp != runtime->oss.period_bytes)
1414                                 break;
1415                 }
1416         }
1417         mutex_unlock(&runtime->oss.params_lock);
1418         return xfer;
1419
1420  err:
1421         mutex_unlock(&runtime->oss.params_lock);
1422         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1423 }
1424
1425 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1426 {
1427         struct snd_pcm_runtime *runtime = substream->runtime;
1428         snd_pcm_sframes_t frames, frames1;
1429 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1430         char __user *final_dst = (char __force __user *)buf;
1431         if (runtime->oss.plugin_first) {
1432                 struct snd_pcm_plugin_channel *channels;
1433                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1434                 if (!in_kernel)
1435                         buf = runtime->oss.buffer;
1436                 frames = bytes / oss_frame_bytes;
1437                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1438                 if (frames1 < 0)
1439                         return frames1;
1440                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1441                 if (frames1 <= 0)
1442                         return frames1;
1443                 bytes = frames1 * oss_frame_bytes;
1444                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1445                         return -EFAULT;
1446         } else
1447 #endif
1448         {
1449                 frames = bytes_to_frames(runtime, bytes);
1450                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1451                 if (frames1 <= 0)
1452                         return frames1;
1453                 bytes = frames_to_bytes(runtime, frames1);
1454         }
1455         return bytes;
1456 }
1457
1458 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1459 {
1460         size_t xfer = 0;
1461         ssize_t tmp;
1462         struct snd_pcm_runtime *runtime = substream->runtime;
1463
1464         if (atomic_read(&substream->mmap_count))
1465                 return -ENXIO;
1466
1467         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1468                 return tmp;
1469         mutex_lock(&runtime->oss.params_lock);
1470         while (bytes > 0) {
1471                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1472                         if (runtime->oss.buffer_used == 0) {
1473                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1474                                 if (tmp <= 0)
1475                                         goto err;
1476                                 runtime->oss.bytes += tmp;
1477                                 runtime->oss.period_ptr = tmp;
1478                                 runtime->oss.buffer_used = tmp;
1479                         }
1480                         tmp = bytes;
1481                         if ((size_t) tmp > runtime->oss.buffer_used)
1482                                 tmp = runtime->oss.buffer_used;
1483                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1484                                 tmp = -EFAULT;
1485                                 goto err;
1486                         }
1487                         buf += tmp;
1488                         bytes -= tmp;
1489                         xfer += tmp;
1490                         runtime->oss.buffer_used -= tmp;
1491                 } else {
1492                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1493                                                 runtime->oss.period_bytes, 0);
1494                         if (tmp <= 0)
1495                                 goto err;
1496                         runtime->oss.bytes += tmp;
1497                         buf += tmp;
1498                         bytes -= tmp;
1499                         xfer += tmp;
1500                 }
1501         }
1502         mutex_unlock(&runtime->oss.params_lock);
1503         return xfer;
1504
1505  err:
1506         mutex_unlock(&runtime->oss.params_lock);
1507         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1508 }
1509
1510 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1511 {
1512         struct snd_pcm_substream *substream;
1513         struct snd_pcm_runtime *runtime;
1514         int i;
1515
1516         for (i = 0; i < 2; i++) {
1517                 substream = pcm_oss_file->streams[i];
1518                 if (!substream)
1519                         continue;
1520                 runtime = substream->runtime;
1521                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1522                 runtime->oss.prepare = 1;
1523                 runtime->oss.buffer_used = 0;
1524                 runtime->oss.prev_hw_ptr_period = 0;
1525                 runtime->oss.period_ptr = 0;
1526         }
1527         return 0;
1528 }
1529
1530 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1531 {
1532         struct snd_pcm_substream *substream;
1533         int err;
1534
1535         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1536         if (substream != NULL) {
1537                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1538                         return err;
1539                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1540         }
1541         /* note: all errors from the start action are ignored */
1542         /* OSS apps do not know, how to handle them */
1543         return 0;
1544 }
1545
1546 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1547 {
1548         struct snd_pcm_runtime *runtime;
1549         ssize_t result = 0;
1550         snd_pcm_state_t state;
1551         long res;
1552         wait_queue_t wait;
1553
1554         runtime = substream->runtime;
1555         init_waitqueue_entry(&wait, current);
1556         add_wait_queue(&runtime->sleep, &wait);
1557 #ifdef OSS_DEBUG
1558         pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1559 #endif
1560         while (1) {
1561                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1562                 if (result > 0) {
1563                         runtime->oss.buffer_used = 0;
1564                         result = 0;
1565                         break;
1566                 }
1567                 if (result != 0 && result != -EAGAIN)
1568                         break;
1569                 result = 0;
1570                 set_current_state(TASK_INTERRUPTIBLE);
1571                 snd_pcm_stream_lock_irq(substream);
1572                 state = runtime->status->state;
1573                 snd_pcm_stream_unlock_irq(substream);
1574                 if (state != SNDRV_PCM_STATE_RUNNING) {
1575                         set_current_state(TASK_RUNNING);
1576                         break;
1577                 }
1578                 res = schedule_timeout(10 * HZ);
1579                 if (signal_pending(current)) {
1580                         result = -ERESTARTSYS;
1581                         break;
1582                 }
1583                 if (res == 0) {
1584                         pcm_err(substream->pcm,
1585                                 "OSS sync error - DMA timeout\n");
1586                         result = -EIO;
1587                         break;
1588                 }
1589         }
1590         remove_wait_queue(&runtime->sleep, &wait);
1591         return result;
1592 }
1593
1594 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1595 {
1596         int err = 0;
1597         unsigned int saved_f_flags;
1598         struct snd_pcm_substream *substream;
1599         struct snd_pcm_runtime *runtime;
1600         snd_pcm_format_t format;
1601         unsigned long width;
1602         size_t size;
1603
1604         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1605         if (substream != NULL) {
1606                 runtime = substream->runtime;
1607                 if (atomic_read(&substream->mmap_count))
1608                         goto __direct;
1609                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1610                         return err;
1611                 format = snd_pcm_oss_format_from(runtime->oss.format);
1612                 width = snd_pcm_format_physical_width(format);
1613                 mutex_lock(&runtime->oss.params_lock);
1614                 if (runtime->oss.buffer_used > 0) {
1615 #ifdef OSS_DEBUG
1616                         pcm_dbg(substream->pcm, "sync: buffer_used\n");
1617 #endif
1618                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1619                         snd_pcm_format_set_silence(format,
1620                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1621                                                    size);
1622                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1623                         if (err < 0) {
1624                                 mutex_unlock(&runtime->oss.params_lock);
1625                                 return err;
1626                         }
1627                 } else if (runtime->oss.period_ptr > 0) {
1628 #ifdef OSS_DEBUG
1629                         pcm_dbg(substream->pcm, "sync: period_ptr\n");
1630 #endif
1631                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1632                         snd_pcm_format_set_silence(format,
1633                                                    runtime->oss.buffer,
1634                                                    size * 8 / width);
1635                         err = snd_pcm_oss_sync1(substream, size);
1636                         if (err < 0) {
1637                                 mutex_unlock(&runtime->oss.params_lock);
1638                                 return err;
1639                         }
1640                 }
1641                 /*
1642                  * The ALSA's period might be a bit large than OSS one.
1643                  * Fill the remain portion of ALSA period with zeros.
1644                  */
1645                 size = runtime->control->appl_ptr % runtime->period_size;
1646                 if (size > 0) {
1647                         size = runtime->period_size - size;
1648                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1649                                 size = (runtime->frame_bits * size) / 8;
1650                                 while (size > 0) {
1651                                         mm_segment_t fs;
1652                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1653                                         size -= size1;
1654                                         size1 *= 8;
1655                                         size1 /= runtime->sample_bits;
1656                                         snd_pcm_format_set_silence(runtime->format,
1657                                                                    runtime->oss.buffer,
1658                                                                    size1);
1659                                         size1 /= runtime->channels; /* frames */
1660                                         fs = snd_enter_user();
1661                                         snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1662                                         snd_leave_user(fs);
1663                                 }
1664                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1665                                 void __user *buffers[runtime->channels];
1666                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1667                                 snd_pcm_lib_writev(substream, buffers, size);
1668                         }
1669                 }
1670                 mutex_unlock(&runtime->oss.params_lock);
1671                 /*
1672                  * finish sync: drain the buffer
1673                  */
1674               __direct:
1675                 saved_f_flags = substream->f_flags;
1676                 substream->f_flags &= ~O_NONBLOCK;
1677                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1678                 substream->f_flags = saved_f_flags;
1679                 if (err < 0)
1680                         return err;
1681                 runtime->oss.prepare = 1;
1682         }
1683
1684         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1685         if (substream != NULL) {
1686                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1687                         return err;
1688                 runtime = substream->runtime;
1689                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1690                 if (err < 0)
1691                         return err;
1692                 runtime->oss.buffer_used = 0;
1693                 runtime->oss.prepare = 1;
1694         }
1695         return 0;
1696 }
1697
1698 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1699 {
1700         int idx;
1701
1702         for (idx = 1; idx >= 0; --idx) {
1703                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704                 struct snd_pcm_runtime *runtime;
1705                 if (substream == NULL)
1706                         continue;
1707                 runtime = substream->runtime;
1708                 if (rate < 1000)
1709                         rate = 1000;
1710                 else if (rate > 192000)
1711                         rate = 192000;
1712                 if (runtime->oss.rate != rate) {
1713                         runtime->oss.params = 1;
1714                         runtime->oss.rate = rate;
1715                 }
1716         }
1717         return snd_pcm_oss_get_rate(pcm_oss_file);
1718 }
1719
1720 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1721 {
1722         struct snd_pcm_substream *substream;
1723         int err;
1724
1725         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1726                 return err;
1727         return substream->runtime->oss.rate;
1728 }
1729
1730 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1731 {
1732         int idx;
1733         if (channels < 1)
1734                 channels = 1;
1735         if (channels > 128)
1736                 return -EINVAL;
1737         for (idx = 1; idx >= 0; --idx) {
1738                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1739                 struct snd_pcm_runtime *runtime;
1740                 if (substream == NULL)
1741                         continue;
1742                 runtime = substream->runtime;
1743                 if (runtime->oss.channels != channels) {
1744                         runtime->oss.params = 1;
1745                         runtime->oss.channels = channels;
1746                 }
1747         }
1748         return snd_pcm_oss_get_channels(pcm_oss_file);
1749 }
1750
1751 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1752 {
1753         struct snd_pcm_substream *substream;
1754         int err;
1755
1756         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1757                 return err;
1758         return substream->runtime->oss.channels;
1759 }
1760
1761 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1762 {
1763         struct snd_pcm_substream *substream;
1764         int err;
1765
1766         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1767                 return err;
1768         return substream->runtime->oss.period_bytes;
1769 }
1770
1771 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1772 {
1773         struct snd_pcm_substream *substream;
1774         int err;
1775         int direct;
1776         struct snd_pcm_hw_params *params;
1777         unsigned int formats = 0;
1778         struct snd_mask format_mask;
1779         int fmt;
1780
1781         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1782                 return err;
1783         if (atomic_read(&substream->mmap_count))
1784                 direct = 1;
1785         else
1786                 direct = substream->oss.setup.direct;
1787         if (!direct)
1788                 return AFMT_MU_LAW | AFMT_U8 |
1789                        AFMT_S16_LE | AFMT_S16_BE |
1790                        AFMT_S8 | AFMT_U16_LE |
1791                        AFMT_U16_BE |
1792                         AFMT_S32_LE | AFMT_S32_BE |
1793                         AFMT_S24_LE | AFMT_S24_BE |
1794                         AFMT_S24_PACKED;
1795         params = kmalloc(sizeof(*params), GFP_KERNEL);
1796         if (!params)
1797                 return -ENOMEM;
1798         _snd_pcm_hw_params_any(params);
1799         err = snd_pcm_hw_refine(substream, params);
1800         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1801         kfree(params);
1802         if (err < 0)
1803                 return err;
1804         for (fmt = 0; fmt < 32; ++fmt) {
1805                 if (snd_mask_test(&format_mask, fmt)) {
1806                         int f = snd_pcm_oss_format_to(fmt);
1807                         if (f >= 0)
1808                                 formats |= f;
1809                 }
1810         }
1811         return formats;
1812 }
1813
1814 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1815 {
1816         int formats, idx;
1817
1818         if (format != AFMT_QUERY) {
1819                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1820                 if (formats < 0)
1821                         return formats;
1822                 if (!(formats & format))
1823                         format = AFMT_U8;
1824                 for (idx = 1; idx >= 0; --idx) {
1825                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1826                         struct snd_pcm_runtime *runtime;
1827                         if (substream == NULL)
1828                                 continue;
1829                         runtime = substream->runtime;
1830                         if (runtime->oss.format != format) {
1831                                 runtime->oss.params = 1;
1832                                 runtime->oss.format = format;
1833                         }
1834                 }
1835         }
1836         return snd_pcm_oss_get_format(pcm_oss_file);
1837 }
1838
1839 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1840 {
1841         struct snd_pcm_substream *substream;
1842         int err;
1843
1844         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1845                 return err;
1846         return substream->runtime->oss.format;
1847 }
1848
1849 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1850 {
1851         struct snd_pcm_runtime *runtime;
1852
1853         if (substream == NULL)
1854                 return 0;
1855         runtime = substream->runtime;
1856         if (subdivide == 0) {
1857                 subdivide = runtime->oss.subdivision;
1858                 if (subdivide == 0)
1859                         subdivide = 1;
1860                 return subdivide;
1861         }
1862         if (runtime->oss.subdivision || runtime->oss.fragshift)
1863                 return -EINVAL;
1864         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1865             subdivide != 8 && subdivide != 16)
1866                 return -EINVAL;
1867         runtime->oss.subdivision = subdivide;
1868         runtime->oss.params = 1;
1869         return subdivide;
1870 }
1871
1872 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1873 {
1874         int err = -EINVAL, idx;
1875
1876         for (idx = 1; idx >= 0; --idx) {
1877                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1878                 if (substream == NULL)
1879                         continue;
1880                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1881                         return err;
1882         }
1883         return err;
1884 }
1885
1886 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1887 {
1888         struct snd_pcm_runtime *runtime;
1889
1890         if (substream == NULL)
1891                 return 0;
1892         runtime = substream->runtime;
1893         if (runtime->oss.subdivision || runtime->oss.fragshift)
1894                 return -EINVAL;
1895         runtime->oss.fragshift = val & 0xffff;
1896         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1897         if (runtime->oss.fragshift < 4)         /* < 16 */
1898                 runtime->oss.fragshift = 4;
1899         if (runtime->oss.maxfrags < 2)
1900                 runtime->oss.maxfrags = 2;
1901         runtime->oss.params = 1;
1902         return 0;
1903 }
1904
1905 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1906 {
1907         int err = -EINVAL, idx;
1908
1909         for (idx = 1; idx >= 0; --idx) {
1910                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1911                 if (substream == NULL)
1912                         continue;
1913                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1914                         return err;
1915         }
1916         return err;
1917 }
1918
1919 static int snd_pcm_oss_nonblock(struct file * file)
1920 {
1921         spin_lock(&file->f_lock);
1922         file->f_flags |= O_NONBLOCK;
1923         spin_unlock(&file->f_lock);
1924         return 0;
1925 }
1926
1927 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1928 {
1929
1930         if (substream == NULL) {
1931                 res &= ~DSP_CAP_DUPLEX;
1932                 return res;
1933         }
1934 #ifdef DSP_CAP_MULTI
1935         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1936                 if (substream->pstr->substream_count > 1)
1937                         res |= DSP_CAP_MULTI;
1938 #endif
1939         /* DSP_CAP_REALTIME is set all times: */
1940         /* all ALSA drivers can return actual pointer in ring buffer */
1941 #if defined(DSP_CAP_REALTIME) && 0
1942         {
1943                 struct snd_pcm_runtime *runtime = substream->runtime;
1944                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1945                         res &= ~DSP_CAP_REALTIME;
1946         }
1947 #endif
1948         return res;
1949 }
1950
1951 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1952 {
1953         int result, idx;
1954
1955         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1956         for (idx = 0; idx < 2; idx++) {
1957                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1958                 result = snd_pcm_oss_get_caps1(substream, result);
1959         }
1960         result |= 0x0001;       /* revision - same as SB AWE 64 */
1961         return result;
1962 }
1963
1964 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1965                                       snd_pcm_uframes_t hw_ptr)
1966 {
1967         struct snd_pcm_runtime *runtime = substream->runtime;
1968         snd_pcm_uframes_t appl_ptr;
1969         appl_ptr = hw_ptr + runtime->buffer_size;
1970         appl_ptr %= runtime->boundary;
1971         runtime->control->appl_ptr = appl_ptr;
1972 }
1973
1974 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1975 {
1976         struct snd_pcm_runtime *runtime;
1977         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1978         int err, cmd;
1979
1980 #ifdef OSS_DEBUG
1981         pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1982 #endif
1983
1984         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1985         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1986
1987         if (psubstream) {
1988                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1989                         return err;
1990         }
1991         if (csubstream) {
1992                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1993                         return err;
1994         }
1995         if (psubstream) {
1996                 runtime = psubstream->runtime;
1997                 if (trigger & PCM_ENABLE_OUTPUT) {
1998                         if (runtime->oss.trigger)
1999                                 goto _skip1;
2000                         if (atomic_read(&psubstream->mmap_count))
2001                                 snd_pcm_oss_simulate_fill(psubstream,
2002                                                 get_hw_ptr_period(runtime));
2003                         runtime->oss.trigger = 1;
2004                         runtime->start_threshold = 1;
2005                         cmd = SNDRV_PCM_IOCTL_START;
2006                 } else {
2007                         if (!runtime->oss.trigger)
2008                                 goto _skip1;
2009                         runtime->oss.trigger = 0;
2010                         runtime->start_threshold = runtime->boundary;
2011                         cmd = SNDRV_PCM_IOCTL_DROP;
2012                         runtime->oss.prepare = 1;
2013                 }
2014                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2015                 if (err < 0)
2016                         return err;
2017         }
2018  _skip1:
2019         if (csubstream) {
2020                 runtime = csubstream->runtime;
2021                 if (trigger & PCM_ENABLE_INPUT) {
2022                         if (runtime->oss.trigger)
2023                                 goto _skip2;
2024                         runtime->oss.trigger = 1;
2025                         runtime->start_threshold = 1;
2026                         cmd = SNDRV_PCM_IOCTL_START;
2027                 } else {
2028                         if (!runtime->oss.trigger)
2029                                 goto _skip2;
2030                         runtime->oss.trigger = 0;
2031                         runtime->start_threshold = runtime->boundary;
2032                         cmd = SNDRV_PCM_IOCTL_DROP;
2033                         runtime->oss.prepare = 1;
2034                 }
2035                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2036                 if (err < 0)
2037                         return err;
2038         }
2039  _skip2:
2040         return 0;
2041 }
2042
2043 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2044 {
2045         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2046         int result = 0;
2047
2048         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2049         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2050         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2051                 result |= PCM_ENABLE_OUTPUT;
2052         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2053                 result |= PCM_ENABLE_INPUT;
2054         return result;
2055 }
2056
2057 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2058 {
2059         struct snd_pcm_substream *substream;
2060         struct snd_pcm_runtime *runtime;
2061         snd_pcm_sframes_t delay;
2062         int err;
2063
2064         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2065         if (substream == NULL)
2066                 return -EINVAL;
2067         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2068                 return err;
2069         runtime = substream->runtime;
2070         if (runtime->oss.params || runtime->oss.prepare)
2071                 return 0;
2072         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2073         if (err == -EPIPE)
2074                 delay = 0;      /* hack for broken OSS applications */
2075         else if (err < 0)
2076                 return err;
2077         return snd_pcm_oss_bytes(substream, delay);
2078 }
2079
2080 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2081 {
2082         struct snd_pcm_substream *substream;
2083         struct snd_pcm_runtime *runtime;
2084         snd_pcm_sframes_t delay;
2085         int fixup;
2086         struct count_info info;
2087         int err;
2088
2089         if (_info == NULL)
2090                 return -EFAULT;
2091         substream = pcm_oss_file->streams[stream];
2092         if (substream == NULL)
2093                 return -EINVAL;
2094         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2095                 return err;
2096         runtime = substream->runtime;
2097         if (runtime->oss.params || runtime->oss.prepare) {
2098                 memset(&info, 0, sizeof(info));
2099                 if (copy_to_user(_info, &info, sizeof(info)))
2100                         return -EFAULT;
2101                 return 0;
2102         }
2103         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2104                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2105                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2106                         err = 0;
2107                         delay = 0;
2108                         fixup = 0;
2109                 } else {
2110                         fixup = runtime->oss.buffer_used;
2111                 }
2112         } else {
2113                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2114                 fixup = -runtime->oss.buffer_used;
2115         }
2116         if (err < 0)
2117                 return err;
2118         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2119         if (atomic_read(&substream->mmap_count)) {
2120                 snd_pcm_sframes_t n;
2121                 delay = get_hw_ptr_period(runtime);
2122                 n = delay - runtime->oss.prev_hw_ptr_period;
2123                 if (n < 0)
2124                         n += runtime->boundary;
2125                 info.blocks = n / runtime->period_size;
2126                 runtime->oss.prev_hw_ptr_period = delay;
2127                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2128                         snd_pcm_oss_simulate_fill(substream, delay);
2129                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2130         } else {
2131                 delay = snd_pcm_oss_bytes(substream, delay);
2132                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2133                         if (substream->oss.setup.buggyptr)
2134                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2135                         else
2136                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2137                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2138                 } else {
2139                         delay += fixup;
2140                         info.blocks = delay / runtime->oss.period_bytes;
2141                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2142                 }
2143         }
2144         if (copy_to_user(_info, &info, sizeof(info)))
2145                 return -EFAULT;
2146         return 0;
2147 }
2148
2149 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2150 {
2151         struct snd_pcm_substream *substream;
2152         struct snd_pcm_runtime *runtime;
2153         snd_pcm_sframes_t avail;
2154         int fixup;
2155         struct audio_buf_info info;
2156         int err;
2157
2158         if (_info == NULL)
2159                 return -EFAULT;
2160         substream = pcm_oss_file->streams[stream];
2161         if (substream == NULL)
2162                 return -EINVAL;
2163         runtime = substream->runtime;
2164
2165         if (runtime->oss.params &&
2166             (err = snd_pcm_oss_change_params(substream)) < 0)
2167                 return err;
2168
2169         info.fragsize = runtime->oss.period_bytes;
2170         info.fragstotal = runtime->periods;
2171         if (runtime->oss.prepare) {
2172                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2173                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2174                         info.fragments = runtime->oss.periods;
2175                 } else {
2176                         info.bytes = 0;
2177                         info.fragments = 0;
2178                 }
2179         } else {
2180                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2181                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2182                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2183                                 avail = runtime->buffer_size;
2184                                 err = 0;
2185                                 fixup = 0;
2186                         } else {
2187                                 avail = runtime->buffer_size - avail;
2188                                 fixup = -runtime->oss.buffer_used;
2189                         }
2190                 } else {
2191                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2192                         fixup = runtime->oss.buffer_used;
2193                 }
2194                 if (err < 0)
2195                         return err;
2196                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2197                 info.fragments = info.bytes / runtime->oss.period_bytes;
2198         }
2199
2200 #ifdef OSS_DEBUG
2201         pcm_dbg(substream->pcm,
2202                 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2203                 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2204 #endif
2205         if (copy_to_user(_info, &info, sizeof(info)))
2206                 return -EFAULT;
2207         return 0;
2208 }
2209
2210 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2211 {
2212         // it won't be probably implemented
2213         // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2214         return -EINVAL;
2215 }
2216
2217 static const char *strip_task_path(const char *path)
2218 {
2219         const char *ptr, *ptrl = NULL;
2220         for (ptr = path; *ptr; ptr++) {
2221                 if (*ptr == '/')
2222                         ptrl = ptr + 1;
2223         }
2224         return ptrl;
2225 }
2226
2227 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2228                                       const char *task_name,
2229                                       struct snd_pcm_oss_setup *rsetup)
2230 {
2231         struct snd_pcm_oss_setup *setup;
2232
2233         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2234         do {
2235                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2236                      setup = setup->next) {
2237                         if (!strcmp(setup->task_name, task_name))
2238                                 goto out;
2239                 }
2240         } while ((task_name = strip_task_path(task_name)) != NULL);
2241  out:
2242         if (setup)
2243                 *rsetup = *setup;
2244         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2245 }
2246
2247 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2248 {
2249         struct snd_pcm_runtime *runtime;
2250         runtime = substream->runtime;
2251         vfree(runtime->oss.buffer);
2252         runtime->oss.buffer = NULL;
2253 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2254         snd_pcm_oss_plugin_clear(substream);
2255 #endif
2256         substream->oss.oss = 0;
2257 }
2258
2259 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2260                                        struct snd_pcm_oss_setup *setup,
2261                                        int minor)
2262 {
2263         struct snd_pcm_runtime *runtime;
2264
2265         substream->oss.oss = 1;
2266         substream->oss.setup = *setup;
2267         if (setup->nonblock)
2268                 substream->f_flags |= O_NONBLOCK;
2269         else if (setup->block)
2270                 substream->f_flags &= ~O_NONBLOCK;
2271         runtime = substream->runtime;
2272         runtime->oss.params = 1;
2273         runtime->oss.trigger = 1;
2274         runtime->oss.rate = 8000;
2275         mutex_init(&runtime->oss.params_lock);
2276         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2277         case SNDRV_MINOR_OSS_PCM_8:
2278                 runtime->oss.format = AFMT_U8;
2279                 break;
2280         case SNDRV_MINOR_OSS_PCM_16:
2281                 runtime->oss.format = AFMT_S16_LE;
2282                 break;
2283         default:
2284                 runtime->oss.format = AFMT_MU_LAW;
2285         }
2286         runtime->oss.channels = 1;
2287         runtime->oss.fragshift = 0;
2288         runtime->oss.maxfrags = 0;
2289         runtime->oss.subdivision = 0;
2290         substream->pcm_release = snd_pcm_oss_release_substream;
2291 }
2292
2293 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2294 {
2295         int cidx;
2296         if (!pcm_oss_file)
2297                 return 0;
2298         for (cidx = 0; cidx < 2; ++cidx) {
2299                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2300                 if (substream)
2301                         snd_pcm_release_substream(substream);
2302         }
2303         kfree(pcm_oss_file);
2304         return 0;
2305 }
2306
2307 static int snd_pcm_oss_open_file(struct file *file,
2308                                  struct snd_pcm *pcm,
2309                                  struct snd_pcm_oss_file **rpcm_oss_file,
2310                                  int minor,
2311                                  struct snd_pcm_oss_setup *setup)
2312 {
2313         int idx, err;
2314         struct snd_pcm_oss_file *pcm_oss_file;
2315         struct snd_pcm_substream *substream;
2316         fmode_t f_mode = file->f_mode;
2317
2318         if (rpcm_oss_file)
2319                 *rpcm_oss_file = NULL;
2320
2321         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2322         if (pcm_oss_file == NULL)
2323                 return -ENOMEM;
2324
2325         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2326             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2327                 f_mode = FMODE_WRITE;
2328
2329         file->f_flags &= ~O_APPEND;
2330         for (idx = 0; idx < 2; idx++) {
2331                 if (setup[idx].disable)
2332                         continue;
2333                 if (! pcm->streams[idx].substream_count)
2334                         continue; /* no matching substream */
2335                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2336                         if (! (f_mode & FMODE_WRITE))
2337                                 continue;
2338                 } else {
2339                         if (! (f_mode & FMODE_READ))
2340                                 continue;
2341                 }
2342                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2343                 if (err < 0) {
2344                         snd_pcm_oss_release_file(pcm_oss_file);
2345                         return err;
2346                 }
2347
2348                 pcm_oss_file->streams[idx] = substream;
2349                 substream->file = pcm_oss_file;
2350                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2351         }
2352
2353         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2354                 snd_pcm_oss_release_file(pcm_oss_file);
2355                 return -EINVAL;
2356         }
2357
2358         file->private_data = pcm_oss_file;
2359         if (rpcm_oss_file)
2360                 *rpcm_oss_file = pcm_oss_file;
2361         return 0;
2362 }
2363
2364
2365 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2366 {
2367         unsigned int idx;
2368
2369         if (snd_BUG_ON(!task || !name || size < 2))
2370                 return -EINVAL;
2371         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2372                 name[idx] = task->comm[idx];
2373         name[idx] = '\0';
2374         return 0;
2375 }
2376
2377 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2378 {
2379         int err;
2380         char task_name[32];
2381         struct snd_pcm *pcm;
2382         struct snd_pcm_oss_file *pcm_oss_file;
2383         struct snd_pcm_oss_setup setup[2];
2384         int nonblock;
2385         wait_queue_t wait;
2386
2387         err = nonseekable_open(inode, file);
2388         if (err < 0)
2389                 return err;
2390
2391         pcm = snd_lookup_oss_minor_data(iminor(inode),
2392                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2393         if (pcm == NULL) {
2394                 err = -ENODEV;
2395                 goto __error1;
2396         }
2397         err = snd_card_file_add(pcm->card, file);
2398         if (err < 0)
2399                 goto __error1;
2400         if (!try_module_get(pcm->card->module)) {
2401                 err = -EFAULT;
2402                 goto __error2;
2403         }
2404         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2405                 err = -EFAULT;
2406                 goto __error;
2407         }
2408         memset(setup, 0, sizeof(setup));
2409         if (file->f_mode & FMODE_WRITE)
2410                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2411                                            task_name, &setup[0]);
2412         if (file->f_mode & FMODE_READ)
2413                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2414                                            task_name, &setup[1]);
2415
2416         nonblock = !!(file->f_flags & O_NONBLOCK);
2417         if (!nonblock)
2418                 nonblock = nonblock_open;
2419
2420         init_waitqueue_entry(&wait, current);
2421         add_wait_queue(&pcm->open_wait, &wait);
2422         mutex_lock(&pcm->open_mutex);
2423         while (1) {
2424                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2425                                             iminor(inode), setup);
2426                 if (err >= 0)
2427                         break;
2428                 if (err == -EAGAIN) {
2429                         if (nonblock) {
2430                                 err = -EBUSY;
2431                                 break;
2432                         }
2433                 } else
2434                         break;
2435                 set_current_state(TASK_INTERRUPTIBLE);
2436                 mutex_unlock(&pcm->open_mutex);
2437                 schedule();
2438                 mutex_lock(&pcm->open_mutex);
2439                 if (pcm->card->shutdown) {
2440                         err = -ENODEV;
2441                         break;
2442                 }
2443                 if (signal_pending(current)) {
2444                         err = -ERESTARTSYS;
2445                         break;
2446                 }
2447         }
2448         remove_wait_queue(&pcm->open_wait, &wait);
2449         mutex_unlock(&pcm->open_mutex);
2450         if (err < 0)
2451                 goto __error;
2452         snd_card_unref(pcm->card);
2453         return err;
2454
2455       __error:
2456         module_put(pcm->card->module);
2457       __error2:
2458         snd_card_file_remove(pcm->card, file);
2459       __error1:
2460         if (pcm)
2461                 snd_card_unref(pcm->card);
2462         return err;
2463 }
2464
2465 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2466 {
2467         struct snd_pcm *pcm;
2468         struct snd_pcm_substream *substream;
2469         struct snd_pcm_oss_file *pcm_oss_file;
2470
2471         pcm_oss_file = file->private_data;
2472         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2473         if (substream == NULL)
2474                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2475         if (snd_BUG_ON(!substream))
2476                 return -ENXIO;
2477         pcm = substream->pcm;
2478         if (!pcm->card->shutdown)
2479                 snd_pcm_oss_sync(pcm_oss_file);
2480         mutex_lock(&pcm->open_mutex);
2481         snd_pcm_oss_release_file(pcm_oss_file);
2482         mutex_unlock(&pcm->open_mutex);
2483         wake_up(&pcm->open_wait);
2484         module_put(pcm->card->module);
2485         snd_card_file_remove(pcm->card, file);
2486         return 0;
2487 }
2488
2489 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2490 {
2491         struct snd_pcm_oss_file *pcm_oss_file;
2492         int __user *p = (int __user *)arg;
2493         int res;
2494
2495         pcm_oss_file = file->private_data;
2496         if (cmd == OSS_GETVERSION)
2497                 return put_user(SNDRV_OSS_VERSION, p);
2498         if (cmd == OSS_ALSAEMULVER)
2499                 return put_user(1, p);
2500 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2501         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2502                 struct snd_pcm_substream *substream;
2503                 int idx;
2504                 for (idx = 0; idx < 2; ++idx) {
2505                         substream = pcm_oss_file->streams[idx];
2506                         if (substream != NULL)
2507                                 break;
2508                 }
2509                 if (snd_BUG_ON(idx >= 2))
2510                         return -ENXIO;
2511                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2512         }
2513 #endif
2514         if (((cmd >> 8) & 0xff) != 'P')
2515                 return -EINVAL;
2516 #ifdef OSS_DEBUG
2517         pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2518 #endif
2519         switch (cmd) {
2520         case SNDCTL_DSP_RESET:
2521                 return snd_pcm_oss_reset(pcm_oss_file);
2522         case SNDCTL_DSP_SYNC:
2523                 return snd_pcm_oss_sync(pcm_oss_file);
2524         case SNDCTL_DSP_SPEED:
2525                 if (get_user(res, p))
2526                         return -EFAULT;
2527                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2528                         return res;
2529                 return put_user(res, p);
2530         case SOUND_PCM_READ_RATE:
2531                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2532                 if (res < 0)
2533                         return res;
2534                 return put_user(res, p);
2535         case SNDCTL_DSP_STEREO:
2536                 if (get_user(res, p))
2537                         return -EFAULT;
2538                 res = res > 0 ? 2 : 1;
2539                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2540                         return res;
2541                 return put_user(--res, p);
2542         case SNDCTL_DSP_GETBLKSIZE:
2543                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2544                 if (res < 0)
2545                         return res;
2546                 return put_user(res, p);
2547         case SNDCTL_DSP_SETFMT:
2548                 if (get_user(res, p))
2549                         return -EFAULT;
2550                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2551                 if (res < 0)
2552                         return res;
2553                 return put_user(res, p);
2554         case SOUND_PCM_READ_BITS:
2555                 res = snd_pcm_oss_get_format(pcm_oss_file);
2556                 if (res < 0)
2557                         return res;
2558                 return put_user(res, p);
2559         case SNDCTL_DSP_CHANNELS:
2560                 if (get_user(res, p))
2561                         return -EFAULT;
2562                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2563                 if (res < 0)
2564                         return res;
2565                 return put_user(res, p);
2566         case SOUND_PCM_READ_CHANNELS:
2567                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2568                 if (res < 0)
2569                         return res;
2570                 return put_user(res, p);
2571         case SOUND_PCM_WRITE_FILTER:
2572         case SOUND_PCM_READ_FILTER:
2573                 return -EIO;
2574         case SNDCTL_DSP_POST:
2575                 return snd_pcm_oss_post(pcm_oss_file);
2576         case SNDCTL_DSP_SUBDIVIDE:
2577                 if (get_user(res, p))
2578                         return -EFAULT;
2579                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2580                 if (res < 0)
2581                         return res;
2582                 return put_user(res, p);
2583         case SNDCTL_DSP_SETFRAGMENT:
2584                 if (get_user(res, p))
2585                         return -EFAULT;
2586                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2587         case SNDCTL_DSP_GETFMTS:
2588                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2589                 if (res < 0)
2590                         return res;
2591                 return put_user(res, p);
2592         case SNDCTL_DSP_GETOSPACE:
2593         case SNDCTL_DSP_GETISPACE:
2594                 return snd_pcm_oss_get_space(pcm_oss_file,
2595                         cmd == SNDCTL_DSP_GETISPACE ?
2596                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2597                         (struct audio_buf_info __user *) arg);
2598         case SNDCTL_DSP_NONBLOCK:
2599                 return snd_pcm_oss_nonblock(file);
2600         case SNDCTL_DSP_GETCAPS:
2601                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2602                 if (res < 0)
2603                         return res;
2604                 return put_user(res, p);
2605         case SNDCTL_DSP_GETTRIGGER:
2606                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2607                 if (res < 0)
2608                         return res;
2609                 return put_user(res, p);
2610         case SNDCTL_DSP_SETTRIGGER:
2611                 if (get_user(res, p))
2612                         return -EFAULT;
2613                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2614         case SNDCTL_DSP_GETIPTR:
2615         case SNDCTL_DSP_GETOPTR:
2616                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2617                         cmd == SNDCTL_DSP_GETIPTR ?
2618                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2619                         (struct count_info __user *) arg);
2620         case SNDCTL_DSP_MAPINBUF:
2621         case SNDCTL_DSP_MAPOUTBUF:
2622                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2623                         cmd == SNDCTL_DSP_MAPINBUF ?
2624                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2625                         (struct buffmem_desc __user *) arg);
2626         case SNDCTL_DSP_SETSYNCRO:
2627                 /* stop DMA now.. */
2628                 return 0;
2629         case SNDCTL_DSP_SETDUPLEX:
2630                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2631                         return 0;
2632                 return -EIO;
2633         case SNDCTL_DSP_GETODELAY:
2634                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2635                 if (res < 0) {
2636                         /* it's for sure, some broken apps don't check for error codes */
2637                         put_user(0, p);
2638                         return res;
2639                 }
2640                 return put_user(res, p);
2641         case SNDCTL_DSP_PROFILE:
2642                 return 0;       /* silently ignore */
2643         default:
2644                 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2645         }
2646         return -EINVAL;
2647 }
2648
2649 #ifdef CONFIG_COMPAT
2650 /* all compatible */
2651 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2652                                      unsigned long arg)
2653 {
2654         return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2655 }
2656 #else
2657 #define snd_pcm_oss_ioctl_compat        NULL
2658 #endif
2659
2660 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2661 {
2662         struct snd_pcm_oss_file *pcm_oss_file;
2663         struct snd_pcm_substream *substream;
2664
2665         pcm_oss_file = file->private_data;
2666         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2667         if (substream == NULL)
2668                 return -ENXIO;
2669         substream->f_flags = file->f_flags & O_NONBLOCK;
2670 #ifndef OSS_DEBUG
2671         return snd_pcm_oss_read1(substream, buf, count);
2672 #else
2673         {
2674                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2675                 pcm_dbg(substream->pcm,
2676                         "pcm_oss: read %li bytes (returned %li bytes)\n",
2677                         (long)count, (long)res);
2678                 return res;
2679         }
2680 #endif
2681 }
2682
2683 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2684 {
2685         struct snd_pcm_oss_file *pcm_oss_file;
2686         struct snd_pcm_substream *substream;
2687         long result;
2688
2689         pcm_oss_file = file->private_data;
2690         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2691         if (substream == NULL)
2692                 return -ENXIO;
2693         substream->f_flags = file->f_flags & O_NONBLOCK;
2694         result = snd_pcm_oss_write1(substream, buf, count);
2695 #ifdef OSS_DEBUG
2696         pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2697                (long)count, (long)result);
2698 #endif
2699         return result;
2700 }
2701
2702 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2703 {
2704         struct snd_pcm_runtime *runtime = substream->runtime;
2705         if (atomic_read(&substream->mmap_count))
2706                 return runtime->oss.prev_hw_ptr_period !=
2707                                                 get_hw_ptr_period(runtime);
2708         else
2709                 return snd_pcm_playback_avail(runtime) >=
2710                                                 runtime->oss.period_frames;
2711 }
2712
2713 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2714 {
2715         struct snd_pcm_runtime *runtime = substream->runtime;
2716         if (atomic_read(&substream->mmap_count))
2717                 return runtime->oss.prev_hw_ptr_period !=
2718                                                 get_hw_ptr_period(runtime);
2719         else
2720                 return snd_pcm_capture_avail(runtime) >=
2721                                                 runtime->oss.period_frames;
2722 }
2723
2724 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2725 {
2726         struct snd_pcm_oss_file *pcm_oss_file;
2727         unsigned int mask;
2728         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2729
2730         pcm_oss_file = file->private_data;
2731
2732         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2733         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2734
2735         mask = 0;
2736         if (psubstream != NULL) {
2737                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2738                 poll_wait(file, &runtime->sleep, wait);
2739                 snd_pcm_stream_lock_irq(psubstream);
2740                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2741                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2742                      snd_pcm_oss_playback_ready(psubstream)))
2743                         mask |= POLLOUT | POLLWRNORM;
2744                 snd_pcm_stream_unlock_irq(psubstream);
2745         }
2746         if (csubstream != NULL) {
2747                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2748                 snd_pcm_state_t ostate;
2749                 poll_wait(file, &runtime->sleep, wait);
2750                 snd_pcm_stream_lock_irq(csubstream);
2751                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2752                     snd_pcm_oss_capture_ready(csubstream))
2753                         mask |= POLLIN | POLLRDNORM;
2754                 snd_pcm_stream_unlock_irq(csubstream);
2755                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2756                         struct snd_pcm_oss_file ofile;
2757                         memset(&ofile, 0, sizeof(ofile));
2758                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2759                         runtime->oss.trigger = 0;
2760                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2761                 }
2762         }
2763
2764         return mask;
2765 }
2766
2767 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2768 {
2769         struct snd_pcm_oss_file *pcm_oss_file;
2770         struct snd_pcm_substream *substream = NULL;
2771         struct snd_pcm_runtime *runtime;
2772         int err;
2773
2774 #ifdef OSS_DEBUG
2775         pr_debug("pcm_oss: mmap begin\n");
2776 #endif
2777         pcm_oss_file = file->private_data;
2778         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2779         case VM_READ | VM_WRITE:
2780                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2781                 if (substream)
2782                         break;
2783                 /* Fall through */
2784         case VM_READ:
2785                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2786                 break;
2787         case VM_WRITE:
2788                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2789                 break;
2790         default:
2791                 return -EINVAL;
2792         }
2793         /* set VM_READ access as well to fix memset() routines that do
2794            reads before writes (to improve performance) */
2795         area->vm_flags |= VM_READ;
2796         if (substream == NULL)
2797                 return -ENXIO;
2798         runtime = substream->runtime;
2799         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2800                 return -EIO;
2801         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2802                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2803         else
2804                 return -EIO;
2805
2806         if (runtime->oss.params) {
2807                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2808                         return err;
2809         }
2810 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2811         if (runtime->oss.plugin_first != NULL)
2812                 return -EIO;
2813 #endif
2814
2815         if (area->vm_pgoff != 0)
2816                 return -EINVAL;
2817
2818         err = snd_pcm_mmap_data(substream, file, area);
2819         if (err < 0)
2820                 return err;
2821         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2822         runtime->silence_threshold = 0;
2823         runtime->silence_size = 0;
2824 #ifdef OSS_DEBUG
2825         pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2826                runtime->oss.mmap_bytes);
2827 #endif
2828         /* In mmap mode we never stop */
2829         runtime->stop_threshold = runtime->boundary;
2830
2831         return 0;
2832 }
2833
2834 #ifdef CONFIG_SND_VERBOSE_PROCFS
2835 /*
2836  *  /proc interface
2837  */
2838
2839 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2840                                   struct snd_info_buffer *buffer)
2841 {
2842         struct snd_pcm_str *pstr = entry->private_data;
2843         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2844         mutex_lock(&pstr->oss.setup_mutex);
2845         while (setup) {
2846                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2847                             setup->task_name,
2848                             setup->periods,
2849                             setup->period_size,
2850                             setup->disable ? " disable" : "",
2851                             setup->direct ? " direct" : "",
2852                             setup->block ? " block" : "",
2853                             setup->nonblock ? " non-block" : "",
2854                             setup->partialfrag ? " partial-frag" : "",
2855                             setup->nosilence ? " no-silence" : "");
2856                 setup = setup->next;
2857         }
2858         mutex_unlock(&pstr->oss.setup_mutex);
2859 }
2860
2861 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2862 {
2863         struct snd_pcm_oss_setup *setup, *setupn;
2864
2865         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2866              setup; setup = setupn) {
2867                 setupn = setup->next;
2868                 kfree(setup->task_name);
2869                 kfree(setup);
2870         }
2871         pstr->oss.setup_list = NULL;
2872 }
2873
2874 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2875                                    struct snd_info_buffer *buffer)
2876 {
2877         struct snd_pcm_str *pstr = entry->private_data;
2878         char line[128], str[32], task_name[32];
2879         const char *ptr;
2880         int idx1;
2881         struct snd_pcm_oss_setup *setup, *setup1, template;
2882
2883         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2884                 mutex_lock(&pstr->oss.setup_mutex);
2885                 memset(&template, 0, sizeof(template));
2886                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2887                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2888                         snd_pcm_oss_proc_free_setup_list(pstr);
2889                         mutex_unlock(&pstr->oss.setup_mutex);
2890                         continue;
2891                 }
2892                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2893                         if (!strcmp(setup->task_name, task_name)) {
2894                                 template = *setup;
2895                                 break;
2896                         }
2897                 }
2898                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2899                 template.periods = simple_strtoul(str, NULL, 10);
2900                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2901                 template.period_size = simple_strtoul(str, NULL, 10);
2902                 for (idx1 = 31; idx1 >= 0; idx1--)
2903                         if (template.period_size & (1 << idx1))
2904                                 break;
2905                 for (idx1--; idx1 >= 0; idx1--)
2906                         template.period_size &= ~(1 << idx1);
2907                 do {
2908                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2909                         if (!strcmp(str, "disable")) {
2910                                 template.disable = 1;
2911                         } else if (!strcmp(str, "direct")) {
2912                                 template.direct = 1;
2913                         } else if (!strcmp(str, "block")) {
2914                                 template.block = 1;
2915                         } else if (!strcmp(str, "non-block")) {
2916                                 template.nonblock = 1;
2917                         } else if (!strcmp(str, "partial-frag")) {
2918                                 template.partialfrag = 1;
2919                         } else if (!strcmp(str, "no-silence")) {
2920                                 template.nosilence = 1;
2921                         } else if (!strcmp(str, "buggy-ptr")) {
2922                                 template.buggyptr = 1;
2923                         }
2924                 } while (*str);
2925                 if (setup == NULL) {
2926                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2927                         if (! setup) {
2928                                 buffer->error = -ENOMEM;
2929                                 mutex_unlock(&pstr->oss.setup_mutex);
2930                                 return;
2931                         }
2932                         if (pstr->oss.setup_list == NULL)
2933                                 pstr->oss.setup_list = setup;
2934                         else {
2935                                 for (setup1 = pstr->oss.setup_list;
2936                                      setup1->next; setup1 = setup1->next);
2937                                 setup1->next = setup;
2938                         }
2939                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2940                         if (! template.task_name) {
2941                                 kfree(setup);
2942                                 buffer->error = -ENOMEM;
2943                                 mutex_unlock(&pstr->oss.setup_mutex);
2944                                 return;
2945                         }
2946                 }
2947                 *setup = template;
2948                 mutex_unlock(&pstr->oss.setup_mutex);
2949         }
2950 }
2951
2952 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2953 {
2954         int stream;
2955         for (stream = 0; stream < 2; ++stream) {
2956                 struct snd_info_entry *entry;
2957                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2958                 if (pstr->substream_count == 0)
2959                         continue;
2960                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2961                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2962                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2963                         entry->c.text.read = snd_pcm_oss_proc_read;
2964                         entry->c.text.write = snd_pcm_oss_proc_write;
2965                         entry->private_data = pstr;
2966                         if (snd_info_register(entry) < 0) {
2967                                 snd_info_free_entry(entry);
2968                                 entry = NULL;
2969                         }
2970                 }
2971                 pstr->oss.proc_entry = entry;
2972         }
2973 }
2974
2975 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2976 {
2977         int stream;
2978         for (stream = 0; stream < 2; ++stream) {
2979                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2980                 snd_info_free_entry(pstr->oss.proc_entry);
2981                 pstr->oss.proc_entry = NULL;
2982                 snd_pcm_oss_proc_free_setup_list(pstr);
2983         }
2984 }
2985 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2986 #define snd_pcm_oss_proc_init(pcm)
2987 #define snd_pcm_oss_proc_done(pcm)
2988 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2989
2990 /*
2991  *  ENTRY functions
2992  */
2993
2994 static const struct file_operations snd_pcm_oss_f_reg =
2995 {
2996         .owner =        THIS_MODULE,
2997         .read =         snd_pcm_oss_read,
2998         .write =        snd_pcm_oss_write,
2999         .open =         snd_pcm_oss_open,
3000         .release =      snd_pcm_oss_release,
3001         .llseek =       no_llseek,
3002         .poll =         snd_pcm_oss_poll,
3003         .unlocked_ioctl =       snd_pcm_oss_ioctl,
3004         .compat_ioctl = snd_pcm_oss_ioctl_compat,
3005         .mmap =         snd_pcm_oss_mmap,
3006 };
3007
3008 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3009 {
3010         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3011                                     pcm->card, index, &snd_pcm_oss_f_reg,
3012                                     pcm) < 0) {
3013                 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3014                            pcm->card->number, pcm->device);
3015         }
3016 }
3017
3018 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3019 {
3020         pcm->oss.reg = 0;
3021         if (dsp_map[pcm->card->number] == (int)pcm->device) {
3022                 char name[128];
3023                 int duplex;
3024                 register_oss_dsp(pcm, 0);
3025                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3026                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3027                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3028                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3029 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3030                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3031                                       pcm->card->number,
3032                                       name);
3033 #endif
3034                 pcm->oss.reg++;
3035                 pcm->oss.reg_mask |= 1;
3036         }
3037         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3038                 register_oss_dsp(pcm, 1);
3039                 pcm->oss.reg++;
3040                 pcm->oss.reg_mask |= 2;
3041         }
3042
3043         if (pcm->oss.reg)
3044                 snd_pcm_oss_proc_init(pcm);
3045
3046         return 0;
3047 }
3048
3049 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3050 {
3051         if (pcm->oss.reg) {
3052                 if (pcm->oss.reg_mask & 1) {
3053                         pcm->oss.reg_mask &= ~1;
3054                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3055                                                   pcm->card, 0);
3056                 }
3057                 if (pcm->oss.reg_mask & 2) {
3058                         pcm->oss.reg_mask &= ~2;
3059                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3060                                                   pcm->card, 1);
3061                 }
3062                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3063 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3064                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3065 #endif
3066                 }
3067                 pcm->oss.reg = 0;
3068         }
3069         return 0;
3070 }
3071
3072 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3073 {
3074         snd_pcm_oss_disconnect_minor(pcm);
3075         snd_pcm_oss_proc_done(pcm);
3076         return 0;
3077 }
3078
3079 static struct snd_pcm_notify snd_pcm_oss_notify =
3080 {
3081         .n_register =   snd_pcm_oss_register_minor,
3082         .n_disconnect = snd_pcm_oss_disconnect_minor,
3083         .n_unregister = snd_pcm_oss_unregister_minor,
3084 };
3085
3086 static int __init alsa_pcm_oss_init(void)
3087 {
3088         int i;
3089         int err;
3090
3091         /* check device map table */
3092         for (i = 0; i < SNDRV_CARDS; i++) {
3093                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3094                         pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3095                                    i, dsp_map[i]);
3096                         dsp_map[i] = 0;
3097                 }
3098                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3099                         pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3100                                    i, adsp_map[i]);
3101                         adsp_map[i] = 1;
3102                 }
3103         }
3104         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3105                 return err;
3106         return 0;
3107 }
3108
3109 static void __exit alsa_pcm_oss_exit(void)
3110 {
3111         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3112 }
3113
3114 module_init(alsa_pcm_oss_init)
3115 module_exit(alsa_pcm_oss_exit)