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/sched/signal.h>
  32 #include <linux/time.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/module.h>
  35 #include <linux/math64.h>
  36 #include <linux/string.h>
  37 #include <linux/compat.h>
  38 #include <sound/core.h>
  39 #include <sound/minors.h>
  40 #include <sound/pcm.h>
  41 #include <sound/pcm_params.h>
  42 #include "pcm_plugin.h"
  43 #include <sound/info.h>
  44 #include <linux/soundcard.h>
  45 #include <sound/initval.h>
  46 #include <sound/mixer_oss.h>
  47
  48 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  49
  50 static int dsp_map[SNDRV_CARDS];
  51 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  52 static bool nonblock_open = 1;
  53
  54 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  55 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  56 MODULE_LICENSE("GPL");
  57 module_param_array(dsp_map, int, NULL, 0444);
  58 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  59 module_param_array(adsp_map, int, NULL, 0444);
  60 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  61 module_param(nonblock_open, bool, 0644);
  62 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  64 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  65
  66 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  67 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  68 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  69
  70 /*
  71  * helper functions to process hw_params
  72  */
  73 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
  74 {
  75         int changed = 0;
  76         if (i->min < min) {
  77                 i->min = min;
  78                 i->openmin = openmin;
  79                 changed = 1;
  80         } else if (i->min == min && !i->openmin && openmin) {
  81                 i->openmin = 1;
  82                 changed = 1;
  83         }
  84         if (i->integer) {
  85                 if (i->openmin) {
  86                         i->min++;
  87                         i->openmin = 0;
  88                 }
  89         }
  90         if (snd_interval_checkempty(i)) {
  91                 snd_interval_none(i);
  92                 return -EINVAL;
  93         }
  94         return changed;
  95 }
  96
  97 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
  98 {
  99         int changed = 0;
 100         if (i->max > max) {
 101                 i->max = max;
 102                 i->openmax = openmax;
 103                 changed = 1;
 104         } else if (i->max == max && !i->openmax && openmax) {
 105                 i->openmax = 1;
 106                 changed = 1;
 107         }
 108         if (i->integer) {
 109                 if (i->openmax) {
 110                         i->max--;
 111                         i->openmax = 0;
 112                 }
 113         }
 114         if (snd_interval_checkempty(i)) {
 115                 snd_interval_none(i);
 116                 return -EINVAL;
 117         }
 118         return changed;
 119 }
 120
 121 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
 122 {
 123         struct snd_interval t;
 124         t.empty = 0;
 125         t.min = t.max = val;
 126         t.openmin = t.openmax = 0;
 127         t.integer = 1;
 128         return snd_interval_refine(i, &t);
 129 }
 130
 131 /**
 132  * snd_pcm_hw_param_value_min
 133  * @params: the hw_params instance
 134  * @var: parameter to retrieve
 135  * @dir: pointer to the direction (-1,0,1) or NULL
 136  *
 137  * Return the minimum value for field PAR.
 138  */
 139 static unsigned int
 140 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
 141                            snd_pcm_hw_param_t var, int *dir)
 142 {
 143         if (hw_is_mask(var)) {
 144                 if (dir)
 145                         *dir = 0;
 146                 return snd_mask_min(hw_param_mask_c(params, var));
 147         }
 148         if (hw_is_interval(var)) {
 149                 const struct snd_interval *i = hw_param_interval_c(params, var);
 150                 if (dir)
 151                         *dir = i->openmin;
 152                 return snd_interval_min(i);
 153         }
 154         return -EINVAL;
 155 }
 156
 157 /**
 158  * snd_pcm_hw_param_value_max
 159  * @params: the hw_params instance
 160  * @var: parameter to retrieve
 161  * @dir: pointer to the direction (-1,0,1) or NULL
 162  *
 163  * Return the maximum value for field PAR.
 164  */
 165 static unsigned int
 166 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 167                            snd_pcm_hw_param_t var, int *dir)
 168 {
 169         if (hw_is_mask(var)) {
 170                 if (dir)
 171                         *dir = 0;
 172                 return snd_mask_max(hw_param_mask_c(params, var));
 173         }
 174         if (hw_is_interval(var)) {
 175                 const struct snd_interval *i = hw_param_interval_c(params, var);
 176                 if (dir)
 177                         *dir = - (int) i->openmax;
 178                 return snd_interval_max(i);
 179         }
 180         return -EINVAL;
 181 }
 182
 183 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
 184                                   snd_pcm_hw_param_t var,
 185                                   const struct snd_mask *val)
 186 {
 187         int changed;
 188         changed = snd_mask_refine(hw_param_mask(params, var), val);
 189         if (changed > 0) {
 190                 params->cmask |= 1 << var;
 191                 params->rmask |= 1 << var;
 192         }
 193         return changed;
 194 }
 195
 196 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
 197                                  struct snd_pcm_hw_params *params,
 198                                  snd_pcm_hw_param_t var,
 199                                  const struct snd_mask *val)
 200 {
 201         int changed = _snd_pcm_hw_param_mask(params, var, val);
 202         if (changed < 0)
 203                 return changed;
 204         if (params->rmask) {
 205                 int err = snd_pcm_hw_refine(pcm, params);
 206                 if (err < 0)
 207                         return err;
 208         }
 209         return 0;
 210 }
 211
 212 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
 213                                  snd_pcm_hw_param_t var, unsigned int val,
 214                                  int dir)
 215 {
 216         int changed;
 217         int open = 0;
 218         if (dir) {
 219                 if (dir > 0) {
 220                         open = 1;
 221                 } else if (dir < 0) {
 222                         if (val > 0) {
 223                                 open = 1;
 224                                 val--;
 225                         }
 226                 }
 227         }
 228         if (hw_is_mask(var))
 229                 changed = snd_mask_refine_min(hw_param_mask(params, var),
 230                                               val + !!open);
 231         else if (hw_is_interval(var))
 232                 changed = snd_interval_refine_min(hw_param_interval(params, var),
 233                                                   val, open);
 234         else
 235                 return -EINVAL;
 236         if (changed > 0) {
 237                 params->cmask |= 1 << var;
 238                 params->rmask |= 1 << var;
 239         }
 240         return changed;
 241 }
 242
 243 /**
 244  * snd_pcm_hw_param_min
 245  * @pcm: PCM instance
 246  * @params: the hw_params instance
 247  * @var: parameter to retrieve
 248  * @val: minimal value
 249  * @dir: pointer to the direction (-1,0,1) or NULL
 250  *
 251  * Inside configuration space defined by PARAMS remove from PAR all
 252  * values < VAL. Reduce configuration space accordingly.
 253  * Return new minimum or -EINVAL if the configuration space is empty
 254  */
 255 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
 256                                 struct snd_pcm_hw_params *params,
 257                                 snd_pcm_hw_param_t var, unsigned int val,
 258                                 int *dir)
 259 {
 260         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
 261         if (changed < 0)
 262                 return changed;
 263         if (params->rmask) {
 264                 int err = snd_pcm_hw_refine(pcm, params);
 265                 if (err < 0)
 266                         return err;
 267         }
 268         return snd_pcm_hw_param_value_min(params, var, dir);
 269 }
 270
 271 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
 272                                  snd_pcm_hw_param_t var, unsigned int val,
 273                                  int dir)
 274 {
 275         int changed;
 276         int open = 0;
 277         if (dir) {
 278                 if (dir < 0) {
 279                         open = 1;
 280                 } else if (dir > 0) {
 281                         open = 1;
 282                         val++;
 283                 }
 284         }
 285         if (hw_is_mask(var)) {
 286                 if (val == 0 && open) {
 287                         snd_mask_none(hw_param_mask(params, var));
 288                         changed = -EINVAL;
 289                 } else
 290                         changed = snd_mask_refine_max(hw_param_mask(params, var),
 291                                                       val - !!open);
 292         } else if (hw_is_interval(var))
 293                 changed = snd_interval_refine_max(hw_param_interval(params, var),
 294                                                   val, open);
 295         else
 296                 return -EINVAL;
 297         if (changed > 0) {
 298                 params->cmask |= 1 << var;
 299                 params->rmask |= 1 << var;
 300         }
 301         return changed;
 302 }
 303
 304 /**
 305  * snd_pcm_hw_param_max
 306  * @pcm: PCM instance
 307  * @params: the hw_params instance
 308  * @var: parameter to retrieve
 309  * @val: maximal value
 310  * @dir: pointer to the direction (-1,0,1) or NULL
 311  *
 312  * Inside configuration space defined by PARAMS remove from PAR all
 313  *  values >= VAL + 1. Reduce configuration space accordingly.
 314  *  Return new maximum or -EINVAL if the configuration space is empty
 315  */
 316 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
 317                                 struct snd_pcm_hw_params *params,
 318                                 snd_pcm_hw_param_t var, unsigned int val,
 319                                 int *dir)
 320 {
 321         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
 322         if (changed < 0)
 323                 return changed;
 324         if (params->rmask) {
 325                 int err = snd_pcm_hw_refine(pcm, params);
 326                 if (err < 0)
 327                         return err;
 328         }
 329         return snd_pcm_hw_param_value_max(params, var, dir);
 330 }
 331
 332 static int boundary_sub(int a, int adir,
 333                         int b, int bdir,
 334                         int *c, int *cdir)
 335 {
 336         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
 337         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
 338         *c = a - b;
 339         *cdir = adir - bdir;
 340         if (*cdir == -2) {
 341                 (*c)--;
 342         } else if (*cdir == 2) {
 343                 (*c)++;
 344         }
 345         return 0;
 346 }
 347
 348 static int boundary_lt(unsigned int a, int adir,
 349                        unsigned int b, int bdir)
 350 {
 351         if (adir < 0) {
 352                 a--;
 353                 adir = 1;
 354         } else if (adir > 0)
 355                 adir = 1;
 356         if (bdir < 0) {
 357                 b--;
 358                 bdir = 1;
 359         } else if (bdir > 0)
 360                 bdir = 1;
 361         return a < b || (a == b && adir < bdir);
 362 }
 363
 364 /* Return 1 if min is nearer to best than max */
 365 static int boundary_nearer(int min, int mindir,
 366                            int best, int bestdir,
 367                            int max, int maxdir)
 368 {
 369         int dmin, dmindir;
 370         int dmax, dmaxdir;
 371         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
 372         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
 373         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
 374 }
 375
 376 /**
 377  * snd_pcm_hw_param_near
 378  * @pcm: PCM instance
 379  * @params: the hw_params instance
 380  * @var: parameter to retrieve
 381  * @best: value to set
 382  * @dir: pointer to the direction (-1,0,1) or NULL
 383  *
 384  * Inside configuration space defined by PARAMS set PAR to the available value
 385  * nearest to VAL. Reduce configuration space accordingly.
 386  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
 387  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
 388  * Return the value found.
 389   */
 390 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 391                                  struct snd_pcm_hw_params *params,
 392                                  snd_pcm_hw_param_t var, unsigned int best,
 393                                  int *dir)
 394 {
 395         struct snd_pcm_hw_params *save = NULL;
 396         int v;
 397         unsigned int saved_min;
 398         int last = 0;
 399         int min, max;
 400         int mindir, maxdir;
 401         int valdir = dir ? *dir : 0;
 402         /* FIXME */
 403         if (best > INT_MAX)
 404                 best = INT_MAX;
 405         min = max = best;
 406         mindir = maxdir = valdir;
 407         if (maxdir > 0)
 408                 maxdir = 0;
 409         else if (maxdir == 0)
 410                 maxdir = -1;
 411         else {
 412                 maxdir = 1;
 413                 max--;
 414         }
 415         save = kmalloc(sizeof(*save), GFP_KERNEL);
 416         if (save == NULL)
 417                 return -ENOMEM;
 418         *save = *params;
 419         saved_min = min;
 420         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
 421         if (min >= 0) {
 422                 struct snd_pcm_hw_params *params1;
 423                 if (max < 0)
 424                         goto _end;
 425                 if ((unsigned int)min == saved_min && mindir == valdir)
 426                         goto _end;
 427                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
 428                 if (params1 == NULL) {
 429                         kfree(save);
 430                         return -ENOMEM;
 431                 }
 432                 *params1 = *save;
 433                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
 434                 if (max < 0) {
 435                         kfree(params1);
 436                         goto _end;
 437                 }
 438                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
 439                         *params = *params1;
 440                         last = 1;
 441                 }
 442                 kfree(params1);
 443         } else {
 444                 *params = *save;
 445                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
 446                 if (max < 0) {
 447                         kfree(save);
 448                         return max;
 449                 }
 450                 last = 1;
 451         }
 452  _end:
 453         kfree(save);
 454         if (last)
 455                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 456         else
 457                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 458         return v;
 459 }
 460
 461 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 462                                  snd_pcm_hw_param_t var, unsigned int val,
 463                                  int dir)
 464 {
 465         int changed;
 466         if (hw_is_mask(var)) {
 467                 struct snd_mask *m = hw_param_mask(params, var);
 468                 if (val == 0 && dir < 0) {
 469                         changed = -EINVAL;
 470                         snd_mask_none(m);
 471                 } else {
 472                         if (dir > 0)
 473                                 val++;
 474                         else if (dir < 0)
 475                                 val--;
 476                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 477                 }
 478         } else if (hw_is_interval(var)) {
 479                 struct snd_interval *i = hw_param_interval(params, var);
 480                 if (val == 0 && dir < 0) {
 481                         changed = -EINVAL;
 482                         snd_interval_none(i);
 483                 } else if (dir == 0)
 484                         changed = snd_interval_refine_set(i, val);
 485                 else {
 486                         struct snd_interval t;
 487                         t.openmin = 1;
 488                         t.openmax = 1;
 489                         t.empty = 0;
 490                         t.integer = 0;
 491                         if (dir < 0) {
 492                                 t.min = val - 1;
 493                                 t.max = val;
 494                         } else {
 495                                 t.min = val;
 496                                 t.max = val+1;
 497                         }
 498                         changed = snd_interval_refine(i, &t);
 499                 }
 500         } else
 501                 return -EINVAL;
 502         if (changed > 0) {
 503                 params->cmask |= 1 << var;
 504                 params->rmask |= 1 << var;
 505         }
 506         return changed;
 507 }
 508
 509 /**
 510  * snd_pcm_hw_param_set
 511  * @pcm: PCM instance
 512  * @params: the hw_params instance
 513  * @var: parameter to retrieve
 514  * @val: value to set
 515  * @dir: pointer to the direction (-1,0,1) or NULL
 516  *
 517  * Inside configuration space defined by PARAMS remove from PAR all
 518  * values != VAL. Reduce configuration space accordingly.
 519  *  Return VAL or -EINVAL if the configuration space is empty
 520  */
 521 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 522                                 struct snd_pcm_hw_params *params,
 523                                 snd_pcm_hw_param_t var, unsigned int val,
 524                                 int dir)
 525 {
 526         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 527         if (changed < 0)
 528                 return changed;
 529         if (params->rmask) {
 530                 int err = snd_pcm_hw_refine(pcm, params);
 531                 if (err < 0)
 532                         return err;
 533         }
 534         return snd_pcm_hw_param_value(params, var, NULL);
 535 }
 536
 537 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 538                                         snd_pcm_hw_param_t var)
 539 {
 540         int changed;
 541         changed = snd_interval_setinteger(hw_param_interval(params, var));
 542         if (changed > 0) {
 543                 params->cmask |= 1 << var;
 544                 params->rmask |= 1 << var;
 545         }
 546         return changed;
 547 }
 548
 549 /*
 550  * plugin
 551  */
 552
 553 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 554 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 555 {
 556         struct snd_pcm_runtime *runtime = substream->runtime;
 557         struct snd_pcm_plugin *plugin, *next;
 558
 559         plugin = runtime->oss.plugin_first;
 560         while (plugin) {
 561                 next = plugin->next;
 562                 snd_pcm_plugin_free(plugin);
 563                 plugin = next;
 564         }
 565         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 566         return 0;
 567 }
 568
 569 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 570 {
 571         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 572         plugin->next = runtime->oss.plugin_first;
 573         plugin->prev = NULL;
 574         if (runtime->oss.plugin_first) {
 575                 runtime->oss.plugin_first->prev = plugin;
 576                 runtime->oss.plugin_first = plugin;
 577         } else {
 578                 runtime->oss.plugin_last =
 579                 runtime->oss.plugin_first = plugin;
 580         }
 581         return 0;
 582 }
 583
 584 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 585 {
 586         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 587         plugin->next = NULL;
 588         plugin->prev = runtime->oss.plugin_last;
 589         if (runtime->oss.plugin_last) {
 590                 runtime->oss.plugin_last->next = plugin;
 591                 runtime->oss.plugin_last = plugin;
 592         } else {
 593                 runtime->oss.plugin_last =
 594                 runtime->oss.plugin_first = plugin;
 595         }
 596         return 0;
 597 }
 598 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 599
 600 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 601 {
 602         struct snd_pcm_runtime *runtime = substream->runtime;
 603         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 604         long bytes = frames_to_bytes(runtime, frames);
 605         if (buffer_size == runtime->oss.buffer_bytes)
 606                 return bytes;
 607 #if BITS_PER_LONG >= 64
 608         return runtime->oss.buffer_bytes * bytes / buffer_size;
 609 #else
 610         {
 611                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 612                 return div_u64(bsize, buffer_size);
 613         }
 614 #endif
 615 }
 616
 617 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 618 {
 619         struct snd_pcm_runtime *runtime = substream->runtime;
 620         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 621         if (buffer_size == runtime->oss.buffer_bytes)
 622                 return bytes_to_frames(runtime, bytes);
 623         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 624 }
 625
 626 static inline
 627 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
 628 {
 629         return runtime->hw_ptr_interrupt;
 630 }
 631
 632 /* define extended formats in the recent OSS versions (if any) */
 633 /* linear formats */
 634 #define AFMT_S32_LE      0x00001000
 635 #define AFMT_S32_BE      0x00002000
 636 #define AFMT_S24_LE      0x00008000
 637 #define AFMT_S24_BE      0x00010000
 638 #define AFMT_S24_PACKED  0x00040000
 639
 640 /* other supported formats */
 641 #define AFMT_FLOAT       0x00004000
 642 #define AFMT_SPDIF_RAW   0x00020000
 643
 644 /* unsupported formats */
 645 #define AFMT_AC3         0x00000400
 646 #define AFMT_VORBIS      0x00000800
 647
 648 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
 649 {
 650         switch (format) {
 651         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 652         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 653         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 654         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 655         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 656         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 657         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 658         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 659         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 660         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 661         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 662         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 663         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 664         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 665         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 666         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 667         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 668         default:                return SNDRV_PCM_FORMAT_U8;
 669         }
 670 }
 671
 672 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
 673 {
 674         switch (format) {
 675         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 676         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 677         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 678         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 679         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 680         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 681         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 682         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 683         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 684         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 685         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 686         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 687         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 688         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 689         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 690         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 691         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 692         default:                        return -EINVAL;
 693         }
 694 }
 695
 696 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 697                                    struct snd_pcm_hw_params *oss_params,
 698                                    struct snd_pcm_hw_params *slave_params)
 699 {
 700         size_t s;
 701         size_t oss_buffer_size, oss_period_size, oss_periods;
 702         size_t min_period_size, max_period_size;
 703         struct snd_pcm_runtime *runtime = substream->runtime;
 704         size_t oss_frame_size;
 705
 706         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 707                          params_channels(oss_params) / 8;
 708
 709         oss_buffer_size = snd_pcm_plug_client_size(substream,
 710                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 711         oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
 712         if (atomic_read(&substream->mmap_count)) {
 713                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 714                         oss_buffer_size = runtime->oss.mmap_bytes;
 715         }
 716
 717         if (substream->oss.setup.period_size > 16)
 718                 oss_period_size = substream->oss.setup.period_size;
 719         else if (runtime->oss.fragshift) {
 720                 oss_period_size = 1 << runtime->oss.fragshift;
 721                 if (oss_period_size > oss_buffer_size / 2)
 722                         oss_period_size = oss_buffer_size / 2;
 723         } else {
 724                 int sd;
 725                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 726
 727                 oss_period_size = oss_buffer_size;
 728                 do {
 729                         oss_period_size /= 2;
 730                 } while (oss_period_size > bytes_per_sec);
 731                 if (runtime->oss.subdivision == 0) {
 732                         sd = 4;
 733                         if (oss_period_size / sd > 4096)
 734                                 sd *= 2;
 735                         if (oss_period_size / sd < 4096)
 736                                 sd = 1;
 737                 } else
 738                         sd = runtime->oss.subdivision;
 739                 oss_period_size /= sd;
 740                 if (oss_period_size < 16)
 741                         oss_period_size = 16;
 742         }
 743
 744         min_period_size = snd_pcm_plug_client_size(substream,
 745                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 746         min_period_size *= oss_frame_size;
 747         min_period_size = roundup_pow_of_two(min_period_size);
 748         if (oss_period_size < min_period_size)
 749                 oss_period_size = min_period_size;
 750
 751         max_period_size = snd_pcm_plug_client_size(substream,
 752                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 753         max_period_size *= oss_frame_size;
 754         max_period_size = rounddown_pow_of_two(max_period_size);
 755         if (oss_period_size > max_period_size)
 756                 oss_period_size = max_period_size;
 757
 758         oss_periods = oss_buffer_size / oss_period_size;
 759
 760         if (substream->oss.setup.periods > 1)
 761                 oss_periods = substream->oss.setup.periods;
 762
 763         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 764         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 765                 s = runtime->oss.maxfrags;
 766         if (oss_periods > s)
 767                 oss_periods = s;
 768
 769         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 770         if (s < 2)
 771                 s = 2;
 772         if (oss_periods < s)
 773                 oss_periods = s;
 774
 775         while (oss_period_size * oss_periods > oss_buffer_size)
 776                 oss_period_size /= 2;
 777
 778         if (oss_period_size < 16)
 779                 return -EINVAL;
 780         runtime->oss.period_bytes = oss_period_size;
 781         runtime->oss.period_frames = 1;
 782         runtime->oss.periods = oss_periods;
 783         return 0;
 784 }
 785
 786 static int choose_rate(struct snd_pcm_substream *substream,
 787                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 788 {
 789         const struct snd_interval *it;
 790         struct snd_pcm_hw_params *save;
 791         unsigned int rate, prev;
 792
 793         save = kmalloc(sizeof(*save), GFP_KERNEL);
 794         if (save == NULL)
 795                 return -ENOMEM;
 796         *save = *params;
 797         it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
 798
 799         /* try multiples of the best rate */
 800         rate = best_rate;
 801         for (;;) {
 802                 if (it->max < rate || (it->max == rate && it->openmax))
 803                         break;
 804                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 805                         int ret;
 806                         ret = snd_pcm_hw_param_set(substream, params,
 807                                                    SNDRV_PCM_HW_PARAM_RATE,
 808                                                    rate, 0);
 809                         if (ret == (int)rate) {
 810                                 kfree(save);
 811                                 return rate;
 812                         }
 813                         *params = *save;
 814                 }
 815                 prev = rate;
 816                 rate += best_rate;
 817                 if (rate <= prev)
 818                         break;
 819         }
 820
 821         /* not found, use the nearest rate */
 822         kfree(save);
 823         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 824 }
 825
 826 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
 827                                      bool trylock)
 828 {
 829         struct snd_pcm_runtime *runtime = substream->runtime;
 830         struct snd_pcm_hw_params *params, *sparams;
 831         struct snd_pcm_sw_params *sw_params;
 832         ssize_t oss_buffer_size, oss_period_size;
 833         size_t oss_frame_size;
 834         int err;
 835         int direct;
 836         snd_pcm_format_t format, sformat;
 837         int n;
 838         const struct snd_mask *sformat_mask;
 839         struct snd_mask mask;
 840
 841         if (trylock) {
 842                 if (!(mutex_trylock(&runtime->oss.params_lock)))
 843                         return -EAGAIN;
 844         } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
 845                 return -ERESTARTSYS;
 846         sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
 847         params = kmalloc(sizeof(*params), GFP_KERNEL);
 848         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 849         if (!sw_params || !params || !sparams) {
 850                 err = -ENOMEM;
 851                 goto failure;
 852         }
 853
 854         if (atomic_read(&substream->mmap_count))
 855                 direct = 1;
 856         else
 857                 direct = substream->oss.setup.direct;
 858
 859         _snd_pcm_hw_params_any(sparams);
 860         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 861         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 862         snd_mask_none(&mask);
 863         if (atomic_read(&substream->mmap_count))
 864                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 865         else {
 866                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 867                 if (!direct)
 868                         snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 869         }
 870         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 871         if (err < 0) {
 872                 pcm_dbg(substream->pcm, "No usable accesses\n");
 873                 err = -EINVAL;
 874                 goto failure;
 875         }
 876         choose_rate(substream, sparams, runtime->oss.rate);
 877         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 878
 879         format = snd_pcm_oss_format_from(runtime->oss.format);
 880
 881         sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 882         if (direct)
 883                 sformat = format;
 884         else
 885                 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
 886
 887         if ((__force int)sformat < 0 ||
 888             !snd_mask_test(sformat_mask, (__force int)sformat)) {
 889                 for (sformat = (__force snd_pcm_format_t)0;
 890                      (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
 891                      sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
 892                         if (snd_mask_test(sformat_mask, (__force int)sformat) &&
 893                             snd_pcm_oss_format_to(sformat) >= 0)
 894                                 break;
 895                 }
 896                 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
 897                         pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
 898                         err = -EINVAL;
 899                         goto failure;
 900                 }
 901         }
 902         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
 903         if (err < 0)
 904                 goto failure;
 905
 906         if (direct) {
 907                 memcpy(params, sparams, sizeof(*params));
 908         } else {
 909                 _snd_pcm_hw_params_any(params);
 910                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 911                                       (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 912                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 913                                       (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
 914                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 915                                       runtime->oss.channels, 0);
 916                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 917                                       runtime->oss.rate, 0);
 918                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 919                          params_access(params), params_format(params),
 920                          params_channels(params), params_rate(params));
 921         }
 922         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 923                  params_access(sparams), params_format(sparams),
 924                  params_channels(sparams), params_rate(sparams));
 925
 926         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 927                          params_channels(params) / 8;
 928
 929 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 930         snd_pcm_oss_plugin_clear(substream);
 931         if (!direct) {
 932                 /* add necessary plugins */
 933                 snd_pcm_oss_plugin_clear(substream);
 934                 if ((err = snd_pcm_plug_format_plugins(substream,
 935                                                        params,
 936                                                        sparams)) < 0) {
 937                         pcm_dbg(substream->pcm,
 938                                 "snd_pcm_plug_format_plugins failed: %i\n", err);
 939                         snd_pcm_oss_plugin_clear(substream);
 940                         goto failure;
 941                 }
 942                 if (runtime->oss.plugin_first) {
 943                         struct snd_pcm_plugin *plugin;
 944                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 945                                 pcm_dbg(substream->pcm,
 946                                         "snd_pcm_plugin_build_io failed: %i\n", err);
 947                                 snd_pcm_oss_plugin_clear(substream);
 948                                 goto failure;
 949                         }
 950                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 951                                 err = snd_pcm_plugin_append(plugin);
 952                         } else {
 953                                 err = snd_pcm_plugin_insert(plugin);
 954                         }
 955                         if (err < 0) {
 956                                 snd_pcm_oss_plugin_clear(substream);
 957                                 goto failure;
 958                         }
 959                 }
 960         }
 961 #endif
 962
 963         err = snd_pcm_oss_period_size(substream, params, sparams);
 964         if (err < 0)
 965                 goto failure;
 966
 967         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 968         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 969         if (err < 0)
 970                 goto failure;
 971
 972         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 973                                      runtime->oss.periods, NULL);
 974         if (err < 0)
 975                 goto failure;
 976
 977         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 978
 979         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 980                 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
 981                 goto failure;
 982         }
 983
 984         if (runtime->oss.trigger) {
 985                 sw_params->start_threshold = 1;
 986         } else {
 987                 sw_params->start_threshold = runtime->boundary;
 988         }
 989         if (atomic_read(&substream->mmap_count) ||
 990             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 991                 sw_params->stop_threshold = runtime->boundary;
 992         else
 993                 sw_params->stop_threshold = runtime->buffer_size;
 994         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 995         sw_params->period_step = 1;
 996         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 997                 1 : runtime->period_size;
 998         if (atomic_read(&substream->mmap_count) ||
 999             substream->oss.setup.nosilence) {
1000                 sw_params->silence_threshold = 0;
1001                 sw_params->silence_size = 0;
1002         } else {
1003                 snd_pcm_uframes_t frames;
1004                 frames = runtime->period_size + 16;
1005                 if (frames > runtime->buffer_size)
1006                         frames = runtime->buffer_size;
1007                 sw_params->silence_threshold = frames;
1008                 sw_params->silence_size = frames;
1009         }
1010
1011         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1012                 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1013                 goto failure;
1014         }
1015
1016         runtime->oss.periods = params_periods(sparams);
1017         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1018         if (oss_period_size < 0) {
1019                 err = -EINVAL;
1020                 goto failure;
1021         }
1022 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1023         if (runtime->oss.plugin_first) {
1024                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1025                 if (err < 0)
1026                         goto failure;
1027         }
1028 #endif
1029         oss_period_size *= oss_frame_size;
1030
1031         oss_buffer_size = oss_period_size * runtime->oss.periods;
1032         if (oss_buffer_size < 0) {
1033                 err = -EINVAL;
1034                 goto failure;
1035         }
1036
1037         runtime->oss.period_bytes = oss_period_size;
1038         runtime->oss.buffer_bytes = oss_buffer_size;
1039
1040         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1041                  runtime->oss.period_bytes,
1042                  runtime->oss.buffer_bytes);
1043         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1044                  params_period_size(sparams),
1045                  params_buffer_size(sparams));
1046
1047         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1048         runtime->oss.channels = params_channels(params);
1049         runtime->oss.rate = params_rate(params);
1050
1051         vfree(runtime->oss.buffer);
1052         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1053         if (!runtime->oss.buffer) {
1054                 err = -ENOMEM;
1055                 goto failure;
1056         }
1057
1058         runtime->oss.params = 0;
1059         runtime->oss.prepare = 1;
1060         runtime->oss.buffer_used = 0;
1061         if (runtime->dma_area)
1062                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1063
1064         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1065
1066         err = 0;
1067 failure:
1068         kfree(sw_params);
1069         kfree(params);
1070         kfree(sparams);
1071         mutex_unlock(&runtime->oss.params_lock);
1072         return err;
1073 }
1074
1075 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1076 {
1077         int idx, err;
1078         struct snd_pcm_substream *asubstream = NULL, *substream;
1079
1080         for (idx = 0; idx < 2; idx++) {
1081                 substream = pcm_oss_file->streams[idx];
1082                 if (substream == NULL)
1083                         continue;
1084                 if (asubstream == NULL)
1085                         asubstream = substream;
1086                 if (substream->runtime->oss.params) {
1087                         err = snd_pcm_oss_change_params(substream, false);
1088                         if (err < 0)
1089                                 return err;
1090                 }
1091         }
1092         if (!asubstream)
1093                 return -EIO;
1094         if (r_substream)
1095                 *r_substream = asubstream;
1096         return 0;
1097 }
1098
1099 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1100 {
1101         int err;
1102         struct snd_pcm_runtime *runtime = substream->runtime;
1103
1104         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1105         if (err < 0) {
1106                 pcm_dbg(substream->pcm,
1107                         "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1108                 return err;
1109         }
1110         runtime->oss.prepare = 0;
1111         runtime->oss.prev_hw_ptr_period = 0;
1112         runtime->oss.period_ptr = 0;
1113         runtime->oss.buffer_used = 0;
1114
1115         return 0;
1116 }
1117
1118 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1119 {
1120         struct snd_pcm_runtime *runtime;
1121         int err;
1122
1123         if (substream == NULL)
1124                 return 0;
1125         runtime = substream->runtime;
1126         if (runtime->oss.params) {
1127                 err = snd_pcm_oss_change_params(substream, false);
1128                 if (err < 0)
1129                         return err;
1130         }
1131         if (runtime->oss.prepare) {
1132                 err = snd_pcm_oss_prepare(substream);
1133                 if (err < 0)
1134                         return err;
1135         }
1136         return 0;
1137 }
1138
1139 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1140 {
1141         struct snd_pcm_runtime *runtime;
1142         snd_pcm_uframes_t frames;
1143         int err = 0;
1144
1145         while (1) {
1146                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1147                 if (err < 0)
1148                         break;
1149                 runtime = substream->runtime;
1150                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1151                         break;
1152                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1153                 /* until avail(delay) <= buffer_size */
1154                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1155                 frames /= runtime->period_size;
1156                 frames *= runtime->period_size;
1157                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1158                 if (err < 0)
1159                         break;
1160         }
1161         return err;
1162 }
1163
1164 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1165 {
1166         struct snd_pcm_runtime *runtime = substream->runtime;
1167         int ret;
1168         while (1) {
1169                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1170                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1171 #ifdef OSS_DEBUG
1172                         pcm_dbg(substream->pcm,
1173                                 "pcm_oss: write: recovering from %s\n",
1174                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1175                                 "XRUN" : "SUSPEND");
1176 #endif
1177                         ret = snd_pcm_oss_prepare(substream);
1178                         if (ret < 0)
1179                                 break;
1180                 }
1181                 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1182                                          frames, in_kernel);
1183                 if (ret != -EPIPE && ret != -ESTRPIPE)
1184                         break;
1185                 /* test, if we can't store new data, because the stream */
1186                 /* has not been started */
1187                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1188                         return -EAGAIN;
1189         }
1190         return ret;
1191 }
1192
1193 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1194 {
1195         struct snd_pcm_runtime *runtime = substream->runtime;
1196         snd_pcm_sframes_t delay;
1197         int ret;
1198         while (1) {
1199                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1200                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1201 #ifdef OSS_DEBUG
1202                         pcm_dbg(substream->pcm,
1203                                 "pcm_oss: read: recovering from %s\n",
1204                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1205                                 "XRUN" : "SUSPEND");
1206 #endif
1207                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1208                         if (ret < 0)
1209                                 break;
1210                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1211                         ret = snd_pcm_oss_prepare(substream);
1212                         if (ret < 0)
1213                                 break;
1214                 }
1215                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1216                 if (ret < 0)
1217                         break;
1218                 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1219                                          frames, in_kernel);
1220                 if (ret == -EPIPE) {
1221                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1222                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1223                                 if (ret < 0)
1224                                         break;
1225                         }
1226                         continue;
1227                 }
1228                 if (ret != -ESTRPIPE)
1229                         break;
1230         }
1231         return ret;
1232 }
1233
1234 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1235 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1236 {
1237         struct snd_pcm_runtime *runtime = substream->runtime;
1238         int ret;
1239         while (1) {
1240                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1241                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1242 #ifdef OSS_DEBUG
1243                         pcm_dbg(substream->pcm,
1244                                 "pcm_oss: writev: recovering from %s\n",
1245                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1246                                 "XRUN" : "SUSPEND");
1247 #endif
1248                         ret = snd_pcm_oss_prepare(substream);
1249                         if (ret < 0)
1250                                 break;
1251                 }
1252                 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1253                 if (ret != -EPIPE && ret != -ESTRPIPE)
1254                         break;
1255
1256                 /* test, if we can't store new data, because the stream */
1257                 /* has not been started */
1258                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1259                         return -EAGAIN;
1260         }
1261         return ret;
1262 }
1263
1264 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1265 {
1266         struct snd_pcm_runtime *runtime = substream->runtime;
1267         int ret;
1268         while (1) {
1269                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1270                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1271 #ifdef OSS_DEBUG
1272                         pcm_dbg(substream->pcm,
1273                                 "pcm_oss: readv: recovering from %s\n",
1274                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1275                                 "XRUN" : "SUSPEND");
1276 #endif
1277                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1278                         if (ret < 0)
1279                                 break;
1280                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1281                         ret = snd_pcm_oss_prepare(substream);
1282                         if (ret < 0)
1283                                 break;
1284                 }
1285                 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1286                 if (ret != -EPIPE && ret != -ESTRPIPE)
1287                         break;
1288         }
1289         return ret;
1290 }
1291 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1292
1293 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1294 {
1295         struct snd_pcm_runtime *runtime = substream->runtime;
1296         snd_pcm_sframes_t frames, frames1;
1297 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1298         if (runtime->oss.plugin_first) {
1299                 struct snd_pcm_plugin_channel *channels;
1300                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1301                 if (!in_kernel) {
1302                         if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1303                                 return -EFAULT;
1304                         buf = runtime->oss.buffer;
1305                 }
1306                 frames = bytes / oss_frame_bytes;
1307                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1308                 if (frames1 < 0)
1309                         return frames1;
1310                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1311                 if (frames1 <= 0)
1312                         return frames1;
1313                 bytes = frames1 * oss_frame_bytes;
1314         } else
1315 #endif
1316         {
1317                 frames = bytes_to_frames(runtime, bytes);
1318                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1319                 if (frames1 <= 0)
1320                         return frames1;
1321                 bytes = frames_to_bytes(runtime, frames1);
1322         }
1323         return bytes;
1324 }
1325
1326 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1327 {
1328         size_t xfer = 0;
1329         ssize_t tmp;
1330         struct snd_pcm_runtime *runtime = substream->runtime;
1331
1332         if (atomic_read(&substream->mmap_count))
1333                 return -ENXIO;
1334
1335         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1336                 return tmp;
1337         while (bytes > 0) {
1338                 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1339                         tmp = -ERESTARTSYS;
1340                         break;
1341                 }
1342                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1343                         tmp = bytes;
1344                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1345                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1346                         if (tmp > 0) {
1347                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1348                                         tmp = -EFAULT;
1349                                         goto err;
1350                                 }
1351                         }
1352                         runtime->oss.buffer_used += tmp;
1353                         buf += tmp;
1354                         bytes -= tmp;
1355                         xfer += tmp;
1356                         if (substream->oss.setup.partialfrag ||
1357                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1358                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1359                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1360                                 if (tmp <= 0)
1361                                         goto err;
1362                                 runtime->oss.bytes += tmp;
1363                                 runtime->oss.period_ptr += tmp;
1364                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1365                                 if (runtime->oss.period_ptr == 0 ||
1366                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1367                                         runtime->oss.buffer_used = 0;
1368                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1369                                         tmp = -EAGAIN;
1370                                         goto err;
1371                                 }
1372                         }
1373                 } else {
1374                         tmp = snd_pcm_oss_write2(substream,
1375                                                  (const char __force *)buf,
1376                                                  runtime->oss.period_bytes, 0);
1377                         if (tmp <= 0)
1378                                 goto err;
1379                         runtime->oss.bytes += tmp;
1380                         buf += tmp;
1381                         bytes -= tmp;
1382                         xfer += tmp;
1383                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1384                             tmp != runtime->oss.period_bytes)
1385                                 tmp = -EAGAIN;
1386                 }
1387  err:
1388                 mutex_unlock(&runtime->oss.params_lock);
1389                 if (tmp < 0)
1390                         break;
1391                 if (signal_pending(current)) {
1392                         tmp = -ERESTARTSYS;
1393                         break;
1394                 }
1395                 tmp = 0;
1396         }
1397         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1398 }
1399
1400 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1401 {
1402         struct snd_pcm_runtime *runtime = substream->runtime;
1403         snd_pcm_sframes_t frames, frames1;
1404 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1405         char __user *final_dst = (char __force __user *)buf;
1406         if (runtime->oss.plugin_first) {
1407                 struct snd_pcm_plugin_channel *channels;
1408                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1409                 if (!in_kernel)
1410                         buf = runtime->oss.buffer;
1411                 frames = bytes / oss_frame_bytes;
1412                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1413                 if (frames1 < 0)
1414                         return frames1;
1415                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1416                 if (frames1 <= 0)
1417                         return frames1;
1418                 bytes = frames1 * oss_frame_bytes;
1419                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1420                         return -EFAULT;
1421         } else
1422 #endif
1423         {
1424                 frames = bytes_to_frames(runtime, bytes);
1425                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1426                 if (frames1 <= 0)
1427                         return frames1;
1428                 bytes = frames_to_bytes(runtime, frames1);
1429         }
1430         return bytes;
1431 }
1432
1433 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1434 {
1435         size_t xfer = 0;
1436         ssize_t tmp;
1437         struct snd_pcm_runtime *runtime = substream->runtime;
1438
1439         if (atomic_read(&substream->mmap_count))
1440                 return -ENXIO;
1441
1442         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1443                 return tmp;
1444         while (bytes > 0) {
1445                 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1446                         tmp = -ERESTARTSYS;
1447                         break;
1448                 }
1449                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1450                         if (runtime->oss.buffer_used == 0) {
1451                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1452                                 if (tmp <= 0)
1453                                         goto err;
1454                                 runtime->oss.bytes += tmp;
1455                                 runtime->oss.period_ptr = tmp;
1456                                 runtime->oss.buffer_used = tmp;
1457                         }
1458                         tmp = bytes;
1459                         if ((size_t) tmp > runtime->oss.buffer_used)
1460                                 tmp = runtime->oss.buffer_used;
1461                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1462                                 tmp = -EFAULT;
1463                                 goto err;
1464                         }
1465                         buf += tmp;
1466                         bytes -= tmp;
1467                         xfer += tmp;
1468                         runtime->oss.buffer_used -= tmp;
1469                 } else {
1470                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1471                                                 runtime->oss.period_bytes, 0);
1472                         if (tmp <= 0)
1473                                 goto err;
1474                         runtime->oss.bytes += tmp;
1475                         buf += tmp;
1476                         bytes -= tmp;
1477                         xfer += tmp;
1478                 }
1479  err:
1480                 mutex_unlock(&runtime->oss.params_lock);
1481                 if (tmp < 0)
1482                         break;
1483                 if (signal_pending(current)) {
1484                         tmp = -ERESTARTSYS;
1485                         break;
1486                 }
1487                 tmp = 0;
1488         }
1489         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1490 }
1491
1492 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1493 {
1494         struct snd_pcm_substream *substream;
1495         struct snd_pcm_runtime *runtime;
1496         int i;
1497
1498         for (i = 0; i < 2; i++) {
1499                 substream = pcm_oss_file->streams[i];
1500                 if (!substream)
1501                         continue;
1502                 runtime = substream->runtime;
1503                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1504                 runtime->oss.prepare = 1;
1505                 runtime->oss.buffer_used = 0;
1506                 runtime->oss.prev_hw_ptr_period = 0;
1507                 runtime->oss.period_ptr = 0;
1508         }
1509         return 0;
1510 }
1511
1512 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1513 {
1514         struct snd_pcm_substream *substream;
1515         int err;
1516
1517         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1518         if (substream != NULL) {
1519                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1520                         return err;
1521                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1522         }
1523         /* note: all errors from the start action are ignored */
1524         /* OSS apps do not know, how to handle them */
1525         return 0;
1526 }
1527
1528 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1529 {
1530         struct snd_pcm_runtime *runtime;
1531         ssize_t result = 0;
1532         snd_pcm_state_t state;
1533         long res;
1534         wait_queue_entry_t wait;
1535
1536         runtime = substream->runtime;
1537         init_waitqueue_entry(&wait, current);
1538         add_wait_queue(&runtime->sleep, &wait);
1539 #ifdef OSS_DEBUG
1540         pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1541 #endif
1542         while (1) {
1543                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1544                 if (result > 0) {
1545                         runtime->oss.buffer_used = 0;
1546                         result = 0;
1547                         break;
1548                 }
1549                 if (result != 0 && result != -EAGAIN)
1550                         break;
1551                 result = 0;
1552                 set_current_state(TASK_INTERRUPTIBLE);
1553                 snd_pcm_stream_lock_irq(substream);
1554                 state = runtime->status->state;
1555                 snd_pcm_stream_unlock_irq(substream);
1556                 if (state != SNDRV_PCM_STATE_RUNNING) {
1557                         set_current_state(TASK_RUNNING);
1558                         break;
1559                 }
1560                 res = schedule_timeout(10 * HZ);
1561                 if (signal_pending(current)) {
1562                         result = -ERESTARTSYS;
1563                         break;
1564                 }
1565                 if (res == 0) {
1566                         pcm_err(substream->pcm,
1567                                 "OSS sync error - DMA timeout\n");
1568                         result = -EIO;
1569                         break;
1570                 }
1571         }
1572         remove_wait_queue(&runtime->sleep, &wait);
1573         return result;
1574 }
1575
1576 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1577 {
1578         int err = 0;
1579         unsigned int saved_f_flags;
1580         struct snd_pcm_substream *substream;
1581         struct snd_pcm_runtime *runtime;
1582         snd_pcm_format_t format;
1583         unsigned long width;
1584         size_t size;
1585
1586         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1587         if (substream != NULL) {
1588                 runtime = substream->runtime;
1589                 if (atomic_read(&substream->mmap_count))
1590                         goto __direct;
1591                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1592                         return err;
1593                 format = snd_pcm_oss_format_from(runtime->oss.format);
1594                 width = snd_pcm_format_physical_width(format);
1595                 mutex_lock(&runtime->oss.params_lock);
1596                 if (runtime->oss.buffer_used > 0) {
1597 #ifdef OSS_DEBUG
1598                         pcm_dbg(substream->pcm, "sync: buffer_used\n");
1599 #endif
1600                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1601                         snd_pcm_format_set_silence(format,
1602                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1603                                                    size);
1604                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1605                         if (err < 0) {
1606                                 mutex_unlock(&runtime->oss.params_lock);
1607                                 return err;
1608                         }
1609                 } else if (runtime->oss.period_ptr > 0) {
1610 #ifdef OSS_DEBUG
1611                         pcm_dbg(substream->pcm, "sync: period_ptr\n");
1612 #endif
1613                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1614                         snd_pcm_format_set_silence(format,
1615                                                    runtime->oss.buffer,
1616                                                    size * 8 / width);
1617                         err = snd_pcm_oss_sync1(substream, size);
1618                         if (err < 0) {
1619                                 mutex_unlock(&runtime->oss.params_lock);
1620                                 return err;
1621                         }
1622                 }
1623                 /*
1624                  * The ALSA's period might be a bit large than OSS one.
1625                  * Fill the remain portion of ALSA period with zeros.
1626                  */
1627                 size = runtime->control->appl_ptr % runtime->period_size;
1628                 if (size > 0) {
1629                         size = runtime->period_size - size;
1630                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1631                                 snd_pcm_lib_write(substream, NULL, size);
1632                         else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1633                                 snd_pcm_lib_writev(substream, NULL, size);
1634                 }
1635                 mutex_unlock(&runtime->oss.params_lock);
1636                 /*
1637                  * finish sync: drain the buffer
1638                  */
1639               __direct:
1640                 saved_f_flags = substream->f_flags;
1641                 substream->f_flags &= ~O_NONBLOCK;
1642                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1643                 substream->f_flags = saved_f_flags;
1644                 if (err < 0)
1645                         return err;
1646                 runtime->oss.prepare = 1;
1647         }
1648
1649         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1650         if (substream != NULL) {
1651                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1652                         return err;
1653                 runtime = substream->runtime;
1654                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1655                 if (err < 0)
1656                         return err;
1657                 runtime->oss.buffer_used = 0;
1658                 runtime->oss.prepare = 1;
1659         }
1660         return 0;
1661 }
1662
1663 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1664 {
1665         int idx;
1666
1667         for (idx = 1; idx >= 0; --idx) {
1668                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1669                 struct snd_pcm_runtime *runtime;
1670                 if (substream == NULL)
1671                         continue;
1672                 runtime = substream->runtime;
1673                 if (rate < 1000)
1674                         rate = 1000;
1675                 else if (rate > 192000)
1676                         rate = 192000;
1677                 if (runtime->oss.rate != rate) {
1678                         runtime->oss.params = 1;
1679                         runtime->oss.rate = rate;
1680                 }
1681         }
1682         return snd_pcm_oss_get_rate(pcm_oss_file);
1683 }
1684
1685 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1686 {
1687         struct snd_pcm_substream *substream;
1688         int err;
1689
1690         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1691                 return err;
1692         return substream->runtime->oss.rate;
1693 }
1694
1695 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1696 {
1697         int idx;
1698         if (channels < 1)
1699                 channels = 1;
1700         if (channels > 128)
1701                 return -EINVAL;
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 (runtime->oss.channels != channels) {
1709                         runtime->oss.params = 1;
1710                         runtime->oss.channels = channels;
1711                 }
1712         }
1713         return snd_pcm_oss_get_channels(pcm_oss_file);
1714 }
1715
1716 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1717 {
1718         struct snd_pcm_substream *substream;
1719         int err;
1720
1721         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1722                 return err;
1723         return substream->runtime->oss.channels;
1724 }
1725
1726 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1727 {
1728         struct snd_pcm_substream *substream;
1729         int err;
1730
1731         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1732                 return err;
1733         return substream->runtime->oss.period_bytes;
1734 }
1735
1736 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1737 {
1738         struct snd_pcm_substream *substream;
1739         int err;
1740         int direct;
1741         struct snd_pcm_hw_params *params;
1742         unsigned int formats = 0;
1743         const struct snd_mask *format_mask;
1744         int fmt;
1745
1746         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1747                 return err;
1748         if (atomic_read(&substream->mmap_count))
1749                 direct = 1;
1750         else
1751                 direct = substream->oss.setup.direct;
1752         if (!direct)
1753                 return AFMT_MU_LAW | AFMT_U8 |
1754                        AFMT_S16_LE | AFMT_S16_BE |
1755                        AFMT_S8 | AFMT_U16_LE |
1756                        AFMT_U16_BE |
1757                         AFMT_S32_LE | AFMT_S32_BE |
1758                         AFMT_S24_LE | AFMT_S24_BE |
1759                         AFMT_S24_PACKED;
1760         params = kmalloc(sizeof(*params), GFP_KERNEL);
1761         if (!params)
1762                 return -ENOMEM;
1763         _snd_pcm_hw_params_any(params);
1764         err = snd_pcm_hw_refine(substream, params);
1765         format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1766         kfree(params);
1767         if (err < 0)
1768                 return err;
1769         for (fmt = 0; fmt < 32; ++fmt) {
1770                 if (snd_mask_test(format_mask, fmt)) {
1771                         int f = snd_pcm_oss_format_to(fmt);
1772                         if (f >= 0)
1773                                 formats |= f;
1774                 }
1775         }
1776         return formats;
1777 }
1778
1779 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1780 {
1781         int formats, idx;
1782
1783         if (format != AFMT_QUERY) {
1784                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1785                 if (formats < 0)
1786                         return formats;
1787                 if (!(formats & format))
1788                         format = AFMT_U8;
1789                 for (idx = 1; idx >= 0; --idx) {
1790                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1791                         struct snd_pcm_runtime *runtime;
1792                         if (substream == NULL)
1793                                 continue;
1794                         runtime = substream->runtime;
1795                         if (runtime->oss.format != format) {
1796                                 runtime->oss.params = 1;
1797                                 runtime->oss.format = format;
1798                         }
1799                 }
1800         }
1801         return snd_pcm_oss_get_format(pcm_oss_file);
1802 }
1803
1804 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1805 {
1806         struct snd_pcm_substream *substream;
1807         int err;
1808
1809         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1810                 return err;
1811         return substream->runtime->oss.format;
1812 }
1813
1814 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1815 {
1816         struct snd_pcm_runtime *runtime;
1817
1818         if (substream == NULL)
1819                 return 0;
1820         runtime = substream->runtime;
1821         if (subdivide == 0) {
1822                 subdivide = runtime->oss.subdivision;
1823                 if (subdivide == 0)
1824                         subdivide = 1;
1825                 return subdivide;
1826         }
1827         if (runtime->oss.subdivision || runtime->oss.fragshift)
1828                 return -EINVAL;
1829         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1830             subdivide != 8 && subdivide != 16)
1831                 return -EINVAL;
1832         runtime->oss.subdivision = subdivide;
1833         runtime->oss.params = 1;
1834         return subdivide;
1835 }
1836
1837 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1838 {
1839         int err = -EINVAL, idx;
1840
1841         for (idx = 1; idx >= 0; --idx) {
1842                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1843                 if (substream == NULL)
1844                         continue;
1845                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1846                         return err;
1847         }
1848         return err;
1849 }
1850
1851 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1852 {
1853         struct snd_pcm_runtime *runtime;
1854
1855         if (substream == NULL)
1856                 return 0;
1857         runtime = substream->runtime;
1858         if (runtime->oss.subdivision || runtime->oss.fragshift)
1859                 return -EINVAL;
1860         runtime->oss.fragshift = val & 0xffff;
1861         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1862         if (runtime->oss.fragshift < 4)         /* < 16 */
1863                 runtime->oss.fragshift = 4;
1864         if (runtime->oss.maxfrags < 2)
1865                 runtime->oss.maxfrags = 2;
1866         runtime->oss.params = 1;
1867         return 0;
1868 }
1869
1870 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1871 {
1872         int err = -EINVAL, idx;
1873
1874         for (idx = 1; idx >= 0; --idx) {
1875                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1876                 if (substream == NULL)
1877                         continue;
1878                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1879                         return err;
1880         }
1881         return err;
1882 }
1883
1884 static int snd_pcm_oss_nonblock(struct file * file)
1885 {
1886         spin_lock(&file->f_lock);
1887         file->f_flags |= O_NONBLOCK;
1888         spin_unlock(&file->f_lock);
1889         return 0;
1890 }
1891
1892 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1893 {
1894
1895         if (substream == NULL) {
1896                 res &= ~DSP_CAP_DUPLEX;
1897                 return res;
1898         }
1899 #ifdef DSP_CAP_MULTI
1900         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1901                 if (substream->pstr->substream_count > 1)
1902                         res |= DSP_CAP_MULTI;
1903 #endif
1904         /* DSP_CAP_REALTIME is set all times: */
1905         /* all ALSA drivers can return actual pointer in ring buffer */
1906 #if defined(DSP_CAP_REALTIME) && 0
1907         {
1908                 struct snd_pcm_runtime *runtime = substream->runtime;
1909                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1910                         res &= ~DSP_CAP_REALTIME;
1911         }
1912 #endif
1913         return res;
1914 }
1915
1916 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1917 {
1918         int result, idx;
1919
1920         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1921         for (idx = 0; idx < 2; idx++) {
1922                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1923                 result = snd_pcm_oss_get_caps1(substream, result);
1924         }
1925         result |= 0x0001;       /* revision - same as SB AWE 64 */
1926         return result;
1927 }
1928
1929 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1930                                       snd_pcm_uframes_t hw_ptr)
1931 {
1932         struct snd_pcm_runtime *runtime = substream->runtime;
1933         snd_pcm_uframes_t appl_ptr;
1934         appl_ptr = hw_ptr + runtime->buffer_size;
1935         appl_ptr %= runtime->boundary;
1936         runtime->control->appl_ptr = appl_ptr;
1937 }
1938
1939 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1940 {
1941         struct snd_pcm_runtime *runtime;
1942         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1943         int err, cmd;
1944
1945 #ifdef OSS_DEBUG
1946         pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1947 #endif
1948
1949         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1950         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1951
1952         if (psubstream) {
1953                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1954                         return err;
1955         }
1956         if (csubstream) {
1957                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1958                         return err;
1959         }
1960         if (psubstream) {
1961                 runtime = psubstream->runtime;
1962                 if (trigger & PCM_ENABLE_OUTPUT) {
1963                         if (runtime->oss.trigger)
1964                                 goto _skip1;
1965                         if (atomic_read(&psubstream->mmap_count))
1966                                 snd_pcm_oss_simulate_fill(psubstream,
1967                                                 get_hw_ptr_period(runtime));
1968                         runtime->oss.trigger = 1;
1969                         runtime->start_threshold = 1;
1970                         cmd = SNDRV_PCM_IOCTL_START;
1971                 } else {
1972                         if (!runtime->oss.trigger)
1973                                 goto _skip1;
1974                         runtime->oss.trigger = 0;
1975                         runtime->start_threshold = runtime->boundary;
1976                         cmd = SNDRV_PCM_IOCTL_DROP;
1977                         runtime->oss.prepare = 1;
1978                 }
1979                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1980                 if (err < 0)
1981                         return err;
1982         }
1983  _skip1:
1984         if (csubstream) {
1985                 runtime = csubstream->runtime;
1986                 if (trigger & PCM_ENABLE_INPUT) {
1987                         if (runtime->oss.trigger)
1988                                 goto _skip2;
1989                         runtime->oss.trigger = 1;
1990                         runtime->start_threshold = 1;
1991                         cmd = SNDRV_PCM_IOCTL_START;
1992                 } else {
1993                         if (!runtime->oss.trigger)
1994                                 goto _skip2;
1995                         runtime->oss.trigger = 0;
1996                         runtime->start_threshold = runtime->boundary;
1997                         cmd = SNDRV_PCM_IOCTL_DROP;
1998                         runtime->oss.prepare = 1;
1999                 }
2000                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2001                 if (err < 0)
2002                         return err;
2003         }
2004  _skip2:
2005         return 0;
2006 }
2007
2008 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2009 {
2010         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2011         int result = 0;
2012
2013         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2014         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2015         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2016                 result |= PCM_ENABLE_OUTPUT;
2017         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2018                 result |= PCM_ENABLE_INPUT;
2019         return result;
2020 }
2021
2022 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2023 {
2024         struct snd_pcm_substream *substream;
2025         struct snd_pcm_runtime *runtime;
2026         snd_pcm_sframes_t delay;
2027         int err;
2028
2029         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2030         if (substream == NULL)
2031                 return -EINVAL;
2032         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2033                 return err;
2034         runtime = substream->runtime;
2035         if (runtime->oss.params || runtime->oss.prepare)
2036                 return 0;
2037         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2038         if (err == -EPIPE)
2039                 delay = 0;      /* hack for broken OSS applications */
2040         else if (err < 0)
2041                 return err;
2042         return snd_pcm_oss_bytes(substream, delay);
2043 }
2044
2045 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2046 {
2047         struct snd_pcm_substream *substream;
2048         struct snd_pcm_runtime *runtime;
2049         snd_pcm_sframes_t delay;
2050         int fixup;
2051         struct count_info info;
2052         int err;
2053
2054         if (_info == NULL)
2055                 return -EFAULT;
2056         substream = pcm_oss_file->streams[stream];
2057         if (substream == NULL)
2058                 return -EINVAL;
2059         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2060                 return err;
2061         runtime = substream->runtime;
2062         if (runtime->oss.params || runtime->oss.prepare) {
2063                 memset(&info, 0, sizeof(info));
2064                 if (copy_to_user(_info, &info, sizeof(info)))
2065                         return -EFAULT;
2066                 return 0;
2067         }
2068         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2069                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2070                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2071                         err = 0;
2072                         delay = 0;
2073                         fixup = 0;
2074                 } else {
2075                         fixup = runtime->oss.buffer_used;
2076                 }
2077         } else {
2078                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2079                 fixup = -runtime->oss.buffer_used;
2080         }
2081         if (err < 0)
2082                 return err;
2083         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2084         if (atomic_read(&substream->mmap_count)) {
2085                 snd_pcm_sframes_t n;
2086                 delay = get_hw_ptr_period(runtime);
2087                 n = delay - runtime->oss.prev_hw_ptr_period;
2088                 if (n < 0)
2089                         n += runtime->boundary;
2090                 info.blocks = n / runtime->period_size;
2091                 runtime->oss.prev_hw_ptr_period = delay;
2092                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2093                         snd_pcm_oss_simulate_fill(substream, delay);
2094                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2095         } else {
2096                 delay = snd_pcm_oss_bytes(substream, delay);
2097                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2098                         if (substream->oss.setup.buggyptr)
2099                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2100                         else
2101                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2102                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2103                 } else {
2104                         delay += fixup;
2105                         info.blocks = delay / runtime->oss.period_bytes;
2106                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2107                 }
2108         }
2109         if (copy_to_user(_info, &info, sizeof(info)))
2110                 return -EFAULT;
2111         return 0;
2112 }
2113
2114 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2115 {
2116         struct snd_pcm_substream *substream;
2117         struct snd_pcm_runtime *runtime;
2118         snd_pcm_sframes_t avail;
2119         int fixup;
2120         struct audio_buf_info info;
2121         int err;
2122
2123         if (_info == NULL)
2124                 return -EFAULT;
2125         substream = pcm_oss_file->streams[stream];
2126         if (substream == NULL)
2127                 return -EINVAL;
2128         runtime = substream->runtime;
2129
2130         if (runtime->oss.params &&
2131             (err = snd_pcm_oss_change_params(substream, false)) < 0)
2132                 return err;
2133
2134         info.fragsize = runtime->oss.period_bytes;
2135         info.fragstotal = runtime->periods;
2136         if (runtime->oss.prepare) {
2137                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2138                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2139                         info.fragments = runtime->oss.periods;
2140                 } else {
2141                         info.bytes = 0;
2142                         info.fragments = 0;
2143                 }
2144         } else {
2145                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2146                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2147                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2148                                 avail = runtime->buffer_size;
2149                                 err = 0;
2150                                 fixup = 0;
2151                         } else {
2152                                 avail = runtime->buffer_size - avail;
2153                                 fixup = -runtime->oss.buffer_used;
2154                         }
2155                 } else {
2156                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2157                         fixup = runtime->oss.buffer_used;
2158                 }
2159                 if (err < 0)
2160                         return err;
2161                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2162                 info.fragments = info.bytes / runtime->oss.period_bytes;
2163         }
2164
2165 #ifdef OSS_DEBUG
2166         pcm_dbg(substream->pcm,
2167                 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2168                 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2169 #endif
2170         if (copy_to_user(_info, &info, sizeof(info)))
2171                 return -EFAULT;
2172         return 0;
2173 }
2174
2175 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2176 {
2177         // it won't be probably implemented
2178         // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2179         return -EINVAL;
2180 }
2181
2182 static const char *strip_task_path(const char *path)
2183 {
2184         const char *ptr, *ptrl = NULL;
2185         for (ptr = path; *ptr; ptr++) {
2186                 if (*ptr == '/')
2187                         ptrl = ptr + 1;
2188         }
2189         return ptrl;
2190 }
2191
2192 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2193                                       const char *task_name,
2194                                       struct snd_pcm_oss_setup *rsetup)
2195 {
2196         struct snd_pcm_oss_setup *setup;
2197
2198         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2199         do {
2200                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2201                      setup = setup->next) {
2202                         if (!strcmp(setup->task_name, task_name))
2203                                 goto out;
2204                 }
2205         } while ((task_name = strip_task_path(task_name)) != NULL);
2206  out:
2207         if (setup)
2208                 *rsetup = *setup;
2209         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2210 }
2211
2212 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2213 {
2214         struct snd_pcm_runtime *runtime;
2215         runtime = substream->runtime;
2216         vfree(runtime->oss.buffer);
2217         runtime->oss.buffer = NULL;
2218 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2219         snd_pcm_oss_plugin_clear(substream);
2220 #endif
2221         substream->oss.oss = 0;
2222 }
2223
2224 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2225                                        struct snd_pcm_oss_setup *setup,
2226                                        int minor)
2227 {
2228         struct snd_pcm_runtime *runtime;
2229
2230         substream->oss.oss = 1;
2231         substream->oss.setup = *setup;
2232         if (setup->nonblock)
2233                 substream->f_flags |= O_NONBLOCK;
2234         else if (setup->block)
2235                 substream->f_flags &= ~O_NONBLOCK;
2236         runtime = substream->runtime;
2237         runtime->oss.params = 1;
2238         runtime->oss.trigger = 1;
2239         runtime->oss.rate = 8000;
2240         mutex_init(&runtime->oss.params_lock);
2241         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2242         case SNDRV_MINOR_OSS_PCM_8:
2243                 runtime->oss.format = AFMT_U8;
2244                 break;
2245         case SNDRV_MINOR_OSS_PCM_16:
2246                 runtime->oss.format = AFMT_S16_LE;
2247                 break;
2248         default:
2249                 runtime->oss.format = AFMT_MU_LAW;
2250         }
2251         runtime->oss.channels = 1;
2252         runtime->oss.fragshift = 0;
2253         runtime->oss.maxfrags = 0;
2254         runtime->oss.subdivision = 0;
2255         substream->pcm_release = snd_pcm_oss_release_substream;
2256 }
2257
2258 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2259 {
2260         int cidx;
2261         if (!pcm_oss_file)
2262                 return 0;
2263         for (cidx = 0; cidx < 2; ++cidx) {
2264                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2265                 if (substream)
2266                         snd_pcm_release_substream(substream);
2267         }
2268         kfree(pcm_oss_file);
2269         return 0;
2270 }
2271
2272 static int snd_pcm_oss_open_file(struct file *file,
2273                                  struct snd_pcm *pcm,
2274                                  struct snd_pcm_oss_file **rpcm_oss_file,
2275                                  int minor,
2276                                  struct snd_pcm_oss_setup *setup)
2277 {
2278         int idx, err;
2279         struct snd_pcm_oss_file *pcm_oss_file;
2280         struct snd_pcm_substream *substream;
2281         fmode_t f_mode = file->f_mode;
2282
2283         if (rpcm_oss_file)
2284                 *rpcm_oss_file = NULL;
2285
2286         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2287         if (pcm_oss_file == NULL)
2288                 return -ENOMEM;
2289
2290         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2291             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2292                 f_mode = FMODE_WRITE;
2293
2294         file->f_flags &= ~O_APPEND;
2295         for (idx = 0; idx < 2; idx++) {
2296                 if (setup[idx].disable)
2297                         continue;
2298                 if (! pcm->streams[idx].substream_count)
2299                         continue; /* no matching substream */
2300                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2301                         if (! (f_mode & FMODE_WRITE))
2302                                 continue;
2303                 } else {
2304                         if (! (f_mode & FMODE_READ))
2305                                 continue;
2306                 }
2307                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2308                 if (err < 0) {
2309                         snd_pcm_oss_release_file(pcm_oss_file);
2310                         return err;
2311                 }
2312
2313                 pcm_oss_file->streams[idx] = substream;
2314                 substream->file = pcm_oss_file;
2315                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2316         }
2317
2318         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2319                 snd_pcm_oss_release_file(pcm_oss_file);
2320                 return -EINVAL;
2321         }
2322
2323         file->private_data = pcm_oss_file;
2324         if (rpcm_oss_file)
2325                 *rpcm_oss_file = pcm_oss_file;
2326         return 0;
2327 }
2328
2329
2330 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2331 {
2332         unsigned int idx;
2333
2334         if (snd_BUG_ON(!task || !name || size < 2))
2335                 return -EINVAL;
2336         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2337                 name[idx] = task->comm[idx];
2338         name[idx] = '\0';
2339         return 0;
2340 }
2341
2342 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2343 {
2344         int err;
2345         char task_name[32];
2346         struct snd_pcm *pcm;
2347         struct snd_pcm_oss_file *pcm_oss_file;
2348         struct snd_pcm_oss_setup setup[2];
2349         int nonblock;
2350         wait_queue_entry_t wait;
2351
2352         err = nonseekable_open(inode, file);
2353         if (err < 0)
2354                 return err;
2355
2356         pcm = snd_lookup_oss_minor_data(iminor(inode),
2357                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2358         if (pcm == NULL) {
2359                 err = -ENODEV;
2360                 goto __error1;
2361         }
2362         err = snd_card_file_add(pcm->card, file);
2363         if (err < 0)
2364                 goto __error1;
2365         if (!try_module_get(pcm->card->module)) {
2366                 err = -EFAULT;
2367                 goto __error2;
2368         }
2369         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2370                 err = -EFAULT;
2371                 goto __error;
2372         }
2373         memset(setup, 0, sizeof(setup));
2374         if (file->f_mode & FMODE_WRITE)
2375                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2376                                            task_name, &setup[0]);
2377         if (file->f_mode & FMODE_READ)
2378                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2379                                            task_name, &setup[1]);
2380
2381         nonblock = !!(file->f_flags & O_NONBLOCK);
2382         if (!nonblock)
2383                 nonblock = nonblock_open;
2384
2385         init_waitqueue_entry(&wait, current);
2386         add_wait_queue(&pcm->open_wait, &wait);
2387         mutex_lock(&pcm->open_mutex);
2388         while (1) {
2389                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2390                                             iminor(inode), setup);
2391                 if (err >= 0)
2392                         break;
2393                 if (err == -EAGAIN) {
2394                         if (nonblock) {
2395                                 err = -EBUSY;
2396                                 break;
2397                         }
2398                 } else
2399                         break;
2400                 set_current_state(TASK_INTERRUPTIBLE);
2401                 mutex_unlock(&pcm->open_mutex);
2402                 schedule();
2403                 mutex_lock(&pcm->open_mutex);
2404                 if (pcm->card->shutdown) {
2405                         err = -ENODEV;
2406                         break;
2407                 }
2408                 if (signal_pending(current)) {
2409                         err = -ERESTARTSYS;
2410                         break;
2411                 }
2412         }
2413         remove_wait_queue(&pcm->open_wait, &wait);
2414         mutex_unlock(&pcm->open_mutex);
2415         if (err < 0)
2416                 goto __error;
2417         snd_card_unref(pcm->card);
2418         return err;
2419
2420       __error:
2421         module_put(pcm->card->module);
2422       __error2:
2423         snd_card_file_remove(pcm->card, file);
2424       __error1:
2425         if (pcm)
2426                 snd_card_unref(pcm->card);
2427         return err;
2428 }
2429
2430 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2431 {
2432         struct snd_pcm *pcm;
2433         struct snd_pcm_substream *substream;
2434         struct snd_pcm_oss_file *pcm_oss_file;
2435
2436         pcm_oss_file = file->private_data;
2437         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2438         if (substream == NULL)
2439                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2440         if (snd_BUG_ON(!substream))
2441                 return -ENXIO;
2442         pcm = substream->pcm;
2443         if (!pcm->card->shutdown)
2444                 snd_pcm_oss_sync(pcm_oss_file);
2445         mutex_lock(&pcm->open_mutex);
2446         snd_pcm_oss_release_file(pcm_oss_file);
2447         mutex_unlock(&pcm->open_mutex);
2448         wake_up(&pcm->open_wait);
2449         module_put(pcm->card->module);
2450         snd_card_file_remove(pcm->card, file);
2451         return 0;
2452 }
2453
2454 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2455 {
2456         struct snd_pcm_oss_file *pcm_oss_file;
2457         int __user *p = (int __user *)arg;
2458         int res;
2459
2460         pcm_oss_file = file->private_data;
2461         if (cmd == OSS_GETVERSION)
2462                 return put_user(SNDRV_OSS_VERSION, p);
2463         if (cmd == OSS_ALSAEMULVER)
2464                 return put_user(1, p);
2465 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2466         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2467                 struct snd_pcm_substream *substream;
2468                 int idx;
2469                 for (idx = 0; idx < 2; ++idx) {
2470                         substream = pcm_oss_file->streams[idx];
2471                         if (substream != NULL)
2472                                 break;
2473                 }
2474                 if (snd_BUG_ON(idx >= 2))
2475                         return -ENXIO;
2476                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2477         }
2478 #endif
2479         if (((cmd >> 8) & 0xff) != 'P')
2480                 return -EINVAL;
2481 #ifdef OSS_DEBUG
2482         pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2483 #endif
2484         switch (cmd) {
2485         case SNDCTL_DSP_RESET:
2486                 return snd_pcm_oss_reset(pcm_oss_file);
2487         case SNDCTL_DSP_SYNC:
2488                 return snd_pcm_oss_sync(pcm_oss_file);
2489         case SNDCTL_DSP_SPEED:
2490                 if (get_user(res, p))
2491                         return -EFAULT;
2492                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2493                         return res;
2494                 return put_user(res, p);
2495         case SOUND_PCM_READ_RATE:
2496                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2497                 if (res < 0)
2498                         return res;
2499                 return put_user(res, p);
2500         case SNDCTL_DSP_STEREO:
2501                 if (get_user(res, p))
2502                         return -EFAULT;
2503                 res = res > 0 ? 2 : 1;
2504                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2505                         return res;
2506                 return put_user(--res, p);
2507         case SNDCTL_DSP_GETBLKSIZE:
2508                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2509                 if (res < 0)
2510                         return res;
2511                 return put_user(res, p);
2512         case SNDCTL_DSP_SETFMT:
2513                 if (get_user(res, p))
2514                         return -EFAULT;
2515                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2516                 if (res < 0)
2517                         return res;
2518                 return put_user(res, p);
2519         case SOUND_PCM_READ_BITS:
2520                 res = snd_pcm_oss_get_format(pcm_oss_file);
2521                 if (res < 0)
2522                         return res;
2523                 return put_user(res, p);
2524         case SNDCTL_DSP_CHANNELS:
2525                 if (get_user(res, p))
2526                         return -EFAULT;
2527                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2528                 if (res < 0)
2529                         return res;
2530                 return put_user(res, p);
2531         case SOUND_PCM_READ_CHANNELS:
2532                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2533                 if (res < 0)
2534                         return res;
2535                 return put_user(res, p);
2536         case SOUND_PCM_WRITE_FILTER:
2537         case SOUND_PCM_READ_FILTER:
2538                 return -EIO;
2539         case SNDCTL_DSP_POST:
2540                 return snd_pcm_oss_post(pcm_oss_file);
2541         case SNDCTL_DSP_SUBDIVIDE:
2542                 if (get_user(res, p))
2543                         return -EFAULT;
2544                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2545                 if (res < 0)
2546                         return res;
2547                 return put_user(res, p);
2548         case SNDCTL_DSP_SETFRAGMENT:
2549                 if (get_user(res, p))
2550                         return -EFAULT;
2551                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2552         case SNDCTL_DSP_GETFMTS:
2553                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2554                 if (res < 0)
2555                         return res;
2556                 return put_user(res, p);
2557         case SNDCTL_DSP_GETOSPACE:
2558         case SNDCTL_DSP_GETISPACE:
2559                 return snd_pcm_oss_get_space(pcm_oss_file,
2560                         cmd == SNDCTL_DSP_GETISPACE ?
2561                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2562                         (struct audio_buf_info __user *) arg);
2563         case SNDCTL_DSP_NONBLOCK:
2564                 return snd_pcm_oss_nonblock(file);
2565         case SNDCTL_DSP_GETCAPS:
2566                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2567                 if (res < 0)
2568                         return res;
2569                 return put_user(res, p);
2570         case SNDCTL_DSP_GETTRIGGER:
2571                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2572                 if (res < 0)
2573                         return res;
2574                 return put_user(res, p);
2575         case SNDCTL_DSP_SETTRIGGER:
2576                 if (get_user(res, p))
2577                         return -EFAULT;
2578                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2579         case SNDCTL_DSP_GETIPTR:
2580         case SNDCTL_DSP_GETOPTR:
2581                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2582                         cmd == SNDCTL_DSP_GETIPTR ?
2583                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2584                         (struct count_info __user *) arg);
2585         case SNDCTL_DSP_MAPINBUF:
2586         case SNDCTL_DSP_MAPOUTBUF:
2587                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2588                         cmd == SNDCTL_DSP_MAPINBUF ?
2589                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2590                         (struct buffmem_desc __user *) arg);
2591         case SNDCTL_DSP_SETSYNCRO:
2592                 /* stop DMA now.. */
2593                 return 0;
2594         case SNDCTL_DSP_SETDUPLEX:
2595                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2596                         return 0;
2597                 return -EIO;
2598         case SNDCTL_DSP_GETODELAY:
2599                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2600                 if (res < 0) {
2601                         /* it's for sure, some broken apps don't check for error codes */
2602                         put_user(0, p);
2603                         return res;
2604                 }
2605                 return put_user(res, p);
2606         case SNDCTL_DSP_PROFILE:
2607                 return 0;       /* silently ignore */
2608         default:
2609                 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2610         }
2611         return -EINVAL;
2612 }
2613
2614 #ifdef CONFIG_COMPAT
2615 /* all compatible */
2616 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2617                                      unsigned long arg)
2618 {
2619         return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2620 }
2621 #else
2622 #define snd_pcm_oss_ioctl_compat        NULL
2623 #endif
2624
2625 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2626 {
2627         struct snd_pcm_oss_file *pcm_oss_file;
2628         struct snd_pcm_substream *substream;
2629
2630         pcm_oss_file = file->private_data;
2631         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2632         if (substream == NULL)
2633                 return -ENXIO;
2634         substream->f_flags = file->f_flags & O_NONBLOCK;
2635 #ifndef OSS_DEBUG
2636         return snd_pcm_oss_read1(substream, buf, count);
2637 #else
2638         {
2639                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2640                 pcm_dbg(substream->pcm,
2641                         "pcm_oss: read %li bytes (returned %li bytes)\n",
2642                         (long)count, (long)res);
2643                 return res;
2644         }
2645 #endif
2646 }
2647
2648 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2649 {
2650         struct snd_pcm_oss_file *pcm_oss_file;
2651         struct snd_pcm_substream *substream;
2652         long result;
2653
2654         pcm_oss_file = file->private_data;
2655         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2656         if (substream == NULL)
2657                 return -ENXIO;
2658         substream->f_flags = file->f_flags & O_NONBLOCK;
2659         result = snd_pcm_oss_write1(substream, buf, count);
2660 #ifdef OSS_DEBUG
2661         pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2662                (long)count, (long)result);
2663 #endif
2664         return result;
2665 }
2666
2667 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2668 {
2669         struct snd_pcm_runtime *runtime = substream->runtime;
2670         if (atomic_read(&substream->mmap_count))
2671                 return runtime->oss.prev_hw_ptr_period !=
2672                                                 get_hw_ptr_period(runtime);
2673         else
2674                 return snd_pcm_playback_avail(runtime) >=
2675                                                 runtime->oss.period_frames;
2676 }
2677
2678 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2679 {
2680         struct snd_pcm_runtime *runtime = substream->runtime;
2681         if (atomic_read(&substream->mmap_count))
2682                 return runtime->oss.prev_hw_ptr_period !=
2683                                                 get_hw_ptr_period(runtime);
2684         else
2685                 return snd_pcm_capture_avail(runtime) >=
2686                                                 runtime->oss.period_frames;
2687 }
2688
2689 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2690 {
2691         struct snd_pcm_oss_file *pcm_oss_file;
2692         __poll_t mask;
2693         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2694
2695         pcm_oss_file = file->private_data;
2696
2697         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2698         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2699
2700         mask = 0;
2701         if (psubstream != NULL) {
2702                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2703                 poll_wait(file, &runtime->sleep, wait);
2704                 snd_pcm_stream_lock_irq(psubstream);
2705                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2706                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2707                      snd_pcm_oss_playback_ready(psubstream)))
2708                         mask |= EPOLLOUT | EPOLLWRNORM;
2709                 snd_pcm_stream_unlock_irq(psubstream);
2710         }
2711         if (csubstream != NULL) {
2712                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2713                 snd_pcm_state_t ostate;
2714                 poll_wait(file, &runtime->sleep, wait);
2715                 snd_pcm_stream_lock_irq(csubstream);
2716                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2717                     snd_pcm_oss_capture_ready(csubstream))
2718                         mask |= EPOLLIN | EPOLLRDNORM;
2719                 snd_pcm_stream_unlock_irq(csubstream);
2720                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2721                         struct snd_pcm_oss_file ofile;
2722                         memset(&ofile, 0, sizeof(ofile));
2723                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2724                         runtime->oss.trigger = 0;
2725                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2726                 }
2727         }
2728
2729         return mask;
2730 }
2731
2732 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2733 {
2734         struct snd_pcm_oss_file *pcm_oss_file;
2735         struct snd_pcm_substream *substream = NULL;
2736         struct snd_pcm_runtime *runtime;
2737         int err;
2738
2739 #ifdef OSS_DEBUG
2740         pr_debug("pcm_oss: mmap begin\n");
2741 #endif
2742         pcm_oss_file = file->private_data;
2743         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2744         case VM_READ | VM_WRITE:
2745                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2746                 if (substream)
2747                         break;
2748                 /* Fall through */
2749         case VM_READ:
2750                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2751                 break;
2752         case VM_WRITE:
2753                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2754                 break;
2755         default:
2756                 return -EINVAL;
2757         }
2758         /* set VM_READ access as well to fix memset() routines that do
2759            reads before writes (to improve performance) */
2760         area->vm_flags |= VM_READ;
2761         if (substream == NULL)
2762                 return -ENXIO;
2763         runtime = substream->runtime;
2764         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2765                 return -EIO;
2766         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2767                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2768         else
2769                 return -EIO;
2770
2771         if (runtime->oss.params) {
2772                 /* use mutex_trylock() for params_lock for avoiding a deadlock
2773                  * between mmap_sem and params_lock taken by
2774                  * copy_from/to_user() in snd_pcm_oss_write/read()
2775                  */
2776                 err = snd_pcm_oss_change_params(substream, true);
2777                 if (err < 0)
2778                         return err;
2779         }
2780 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2781         if (runtime->oss.plugin_first != NULL)
2782                 return -EIO;
2783 #endif
2784
2785         if (area->vm_pgoff != 0)
2786                 return -EINVAL;
2787
2788         err = snd_pcm_mmap_data(substream, file, area);
2789         if (err < 0)
2790                 return err;
2791         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2792         runtime->silence_threshold = 0;
2793         runtime->silence_size = 0;
2794 #ifdef OSS_DEBUG
2795         pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2796                runtime->oss.mmap_bytes);
2797 #endif
2798         /* In mmap mode we never stop */
2799         runtime->stop_threshold = runtime->boundary;
2800
2801         return 0;
2802 }
2803
2804 #ifdef CONFIG_SND_VERBOSE_PROCFS
2805 /*
2806  *  /proc interface
2807  */
2808
2809 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2810                                   struct snd_info_buffer *buffer)
2811 {
2812         struct snd_pcm_str *pstr = entry->private_data;
2813         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2814         mutex_lock(&pstr->oss.setup_mutex);
2815         while (setup) {
2816                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2817                             setup->task_name,
2818                             setup->periods,
2819                             setup->period_size,
2820                             setup->disable ? " disable" : "",
2821                             setup->direct ? " direct" : "",
2822                             setup->block ? " block" : "",
2823                             setup->nonblock ? " non-block" : "",
2824                             setup->partialfrag ? " partial-frag" : "",
2825                             setup->nosilence ? " no-silence" : "");
2826                 setup = setup->next;
2827         }
2828         mutex_unlock(&pstr->oss.setup_mutex);
2829 }
2830
2831 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2832 {
2833         struct snd_pcm_oss_setup *setup, *setupn;
2834
2835         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2836              setup; setup = setupn) {
2837                 setupn = setup->next;
2838                 kfree(setup->task_name);
2839                 kfree(setup);
2840         }
2841         pstr->oss.setup_list = NULL;
2842 }
2843
2844 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2845                                    struct snd_info_buffer *buffer)
2846 {
2847         struct snd_pcm_str *pstr = entry->private_data;
2848         char line[128], str[32], task_name[32];
2849         const char *ptr;
2850         int idx1;
2851         struct snd_pcm_oss_setup *setup, *setup1, template;
2852
2853         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2854                 mutex_lock(&pstr->oss.setup_mutex);
2855                 memset(&template, 0, sizeof(template));
2856                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2857                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2858                         snd_pcm_oss_proc_free_setup_list(pstr);
2859                         mutex_unlock(&pstr->oss.setup_mutex);
2860                         continue;
2861                 }
2862                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2863                         if (!strcmp(setup->task_name, task_name)) {
2864                                 template = *setup;
2865                                 break;
2866                         }
2867                 }
2868                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2869                 template.periods = simple_strtoul(str, NULL, 10);
2870                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2871                 template.period_size = simple_strtoul(str, NULL, 10);
2872                 for (idx1 = 31; idx1 >= 0; idx1--)
2873                         if (template.period_size & (1 << idx1))
2874                                 break;
2875                 for (idx1--; idx1 >= 0; idx1--)
2876                         template.period_size &= ~(1 << idx1);
2877                 do {
2878                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2879                         if (!strcmp(str, "disable")) {
2880                                 template.disable = 1;
2881                         } else if (!strcmp(str, "direct")) {
2882                                 template.direct = 1;
2883                         } else if (!strcmp(str, "block")) {
2884                                 template.block = 1;
2885                         } else if (!strcmp(str, "non-block")) {
2886                                 template.nonblock = 1;
2887                         } else if (!strcmp(str, "partial-frag")) {
2888                                 template.partialfrag = 1;
2889                         } else if (!strcmp(str, "no-silence")) {
2890                                 template.nosilence = 1;
2891                         } else if (!strcmp(str, "buggy-ptr")) {
2892                                 template.buggyptr = 1;
2893                         }
2894                 } while (*str);
2895                 if (setup == NULL) {
2896                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2897                         if (! setup) {
2898                                 buffer->error = -ENOMEM;
2899                                 mutex_unlock(&pstr->oss.setup_mutex);
2900                                 return;
2901                         }
2902                         if (pstr->oss.setup_list == NULL)
2903                                 pstr->oss.setup_list = setup;
2904                         else {
2905                                 for (setup1 = pstr->oss.setup_list;
2906                                      setup1->next; setup1 = setup1->next);
2907                                 setup1->next = setup;
2908                         }
2909                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2910                         if (! template.task_name) {
2911                                 kfree(setup);
2912                                 buffer->error = -ENOMEM;
2913                                 mutex_unlock(&pstr->oss.setup_mutex);
2914                                 return;
2915                         }
2916                 }
2917                 *setup = template;
2918                 mutex_unlock(&pstr->oss.setup_mutex);
2919         }
2920 }
2921
2922 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2923 {
2924         int stream;
2925         for (stream = 0; stream < 2; ++stream) {
2926                 struct snd_info_entry *entry;
2927                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2928                 if (pstr->substream_count == 0)
2929                         continue;
2930                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2931                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2932                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2933                         entry->c.text.read = snd_pcm_oss_proc_read;
2934                         entry->c.text.write = snd_pcm_oss_proc_write;
2935                         entry->private_data = pstr;
2936                         if (snd_info_register(entry) < 0) {
2937                                 snd_info_free_entry(entry);
2938                                 entry = NULL;
2939                         }
2940                 }
2941                 pstr->oss.proc_entry = entry;
2942         }
2943 }
2944
2945 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2946 {
2947         int stream;
2948         for (stream = 0; stream < 2; ++stream) {
2949                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2950                 snd_info_free_entry(pstr->oss.proc_entry);
2951                 pstr->oss.proc_entry = NULL;
2952                 snd_pcm_oss_proc_free_setup_list(pstr);
2953         }
2954 }
2955 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2956 #define snd_pcm_oss_proc_init(pcm)
2957 #define snd_pcm_oss_proc_done(pcm)
2958 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2959
2960 /*
2961  *  ENTRY functions
2962  */
2963
2964 static const struct file_operations snd_pcm_oss_f_reg =
2965 {
2966         .owner =        THIS_MODULE,
2967         .read =         snd_pcm_oss_read,
2968         .write =        snd_pcm_oss_write,
2969         .open =         snd_pcm_oss_open,
2970         .release =      snd_pcm_oss_release,
2971         .llseek =       no_llseek,
2972         .poll =         snd_pcm_oss_poll,
2973         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2974         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2975         .mmap =         snd_pcm_oss_mmap,
2976 };
2977
2978 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2979 {
2980         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2981                                     pcm->card, index, &snd_pcm_oss_f_reg,
2982                                     pcm) < 0) {
2983                 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
2984                            pcm->card->number, pcm->device);
2985         }
2986 }
2987
2988 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2989 {
2990         pcm->oss.reg = 0;
2991         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2992                 char name[128];
2993                 int duplex;
2994                 register_oss_dsp(pcm, 0);
2995                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2996                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2997                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2998                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2999 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3000                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3001                                       pcm->card->number,
3002                                       name);
3003 #endif
3004                 pcm->oss.reg++;
3005                 pcm->oss.reg_mask |= 1;
3006         }
3007         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3008                 register_oss_dsp(pcm, 1);
3009                 pcm->oss.reg++;
3010                 pcm->oss.reg_mask |= 2;
3011         }
3012
3013         if (pcm->oss.reg)
3014                 snd_pcm_oss_proc_init(pcm);
3015
3016         return 0;
3017 }
3018
3019 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3020 {
3021         if (pcm->oss.reg) {
3022                 if (pcm->oss.reg_mask & 1) {
3023                         pcm->oss.reg_mask &= ~1;
3024                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3025                                                   pcm->card, 0);
3026                 }
3027                 if (pcm->oss.reg_mask & 2) {
3028                         pcm->oss.reg_mask &= ~2;
3029                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3030                                                   pcm->card, 1);
3031                 }
3032                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3033 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3034                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3035 #endif
3036                 }
3037                 pcm->oss.reg = 0;
3038         }
3039         return 0;
3040 }
3041
3042 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3043 {
3044         snd_pcm_oss_disconnect_minor(pcm);
3045         snd_pcm_oss_proc_done(pcm);
3046         return 0;
3047 }
3048
3049 static struct snd_pcm_notify snd_pcm_oss_notify =
3050 {
3051         .n_register =   snd_pcm_oss_register_minor,
3052         .n_disconnect = snd_pcm_oss_disconnect_minor,
3053         .n_unregister = snd_pcm_oss_unregister_minor,
3054 };
3055
3056 static int __init alsa_pcm_oss_init(void)
3057 {
3058         int i;
3059         int err;
3060
3061         /* check device map table */
3062         for (i = 0; i < SNDRV_CARDS; i++) {
3063                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3064                         pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3065                                    i, dsp_map[i]);
3066                         dsp_map[i] = 0;
3067                 }
3068                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3069                         pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3070                                    i, adsp_map[i]);
3071                         adsp_map[i] = 1;
3072                 }
3073         }
3074         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3075                 return err;
3076         return 0;
3077 }
3078
3079 static void __exit alsa_pcm_oss_exit(void)
3080 {
3081         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3082 }
3083
3084 module_init(alsa_pcm_oss_init)
3085 module_exit(alsa_pcm_oss_exit)