sound/core/oss/pcm_oss.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer / OSS compatible
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #if 0
  23 #define PLUGIN_DEBUG
  24 #endif
  25 #if 0
  26 #define OSS_DEBUG
  27 #endif
  28
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/time.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/module.h>
  34 #include <linux/math64.h>
  35 #include <linux/string.h>
  36 #include <sound/core.h>
  37 #include <sound/minors.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include "pcm_plugin.h"
  41 #include <sound/info.h>
  42 #include <linux/soundcard.h>
  43 #include <sound/initval.h>
  44 #include <sound/mixer_oss.h>
  45
  46 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  47
  48 static int dsp_map[SNDRV_CARDS];
  49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  50 static bool nonblock_open = 1;
  51
  52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  54 MODULE_LICENSE("GPL");
  55 module_param_array(dsp_map, int, NULL, 0444);
  56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  57 module_param_array(adsp_map, int, NULL, 0444);
  58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  59 module_param(nonblock_open, bool, 0644);
  60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  63
  64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  67
  68 static inline mm_segment_t snd_enter_user(void)
  69 {
  70         mm_segment_t fs = get_fs();
  71         set_fs(get_ds());
  72         return fs;
  73 }
  74
  75 static inline void snd_leave_user(mm_segment_t fs)
  76 {
  77         set_fs(fs);
  78 }
  79
  80 /*
  81  * helper functions to process hw_params
  82  */
  83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
  84 {
  85         int changed = 0;
  86         if (i->min < min) {
  87                 i->min = min;
  88                 i->openmin = openmin;
  89                 changed = 1;
  90         } else if (i->min == min && !i->openmin && openmin) {
  91                 i->openmin = 1;
  92                 changed = 1;
  93         }
  94         if (i->integer) {
  95                 if (i->openmin) {
  96                         i->min++;
  97                         i->openmin = 0;
  98                 }
  99         }
 100         if (snd_interval_checkempty(i)) {
 101                 snd_interval_none(i);
 102                 return -EINVAL;
 103         }
 104         return changed;
 105 }
 106
 107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
 108 {
 109         int changed = 0;
 110         if (i->max > max) {
 111                 i->max = max;
 112                 i->openmax = openmax;
 113                 changed = 1;
 114         } else if (i->max == max && !i->openmax && openmax) {
 115                 i->openmax = 1;
 116                 changed = 1;
 117         }
 118         if (i->integer) {
 119                 if (i->openmax) {
 120                         i->max--;
 121                         i->openmax = 0;
 122                 }
 123         }
 124         if (snd_interval_checkempty(i)) {
 125                 snd_interval_none(i);
 126                 return -EINVAL;
 127         }
 128         return changed;
 129 }
 130
 131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
 132 {
 133         struct snd_interval t;
 134         t.empty = 0;
 135         t.min = t.max = val;
 136         t.openmin = t.openmax = 0;
 137         t.integer = 1;
 138         return snd_interval_refine(i, &t);
 139 }
 140
 141 /**
 142  * snd_pcm_hw_param_value_min
 143  * @params: the hw_params instance
 144  * @var: parameter to retrieve
 145  * @dir: pointer to the direction (-1,0,1) or NULL
 146  *
 147  * Return the minimum value for field PAR.
 148  */
 149 static unsigned int
 150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
 151                            snd_pcm_hw_param_t var, int *dir)
 152 {
 153         if (hw_is_mask(var)) {
 154                 if (dir)
 155                         *dir = 0;
 156                 return snd_mask_min(hw_param_mask_c(params, var));
 157         }
 158         if (hw_is_interval(var)) {
 159                 const struct snd_interval *i = hw_param_interval_c(params, var);
 160                 if (dir)
 161                         *dir = i->openmin;
 162                 return snd_interval_min(i);
 163         }
 164         return -EINVAL;
 165 }
 166
 167 /**
 168  * snd_pcm_hw_param_value_max
 169  * @params: the hw_params instance
 170  * @var: parameter to retrieve
 171  * @dir: pointer to the direction (-1,0,1) or NULL
 172  *
 173  * Return the maximum value for field PAR.
 174  */
 175 static unsigned int
 176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 177                            snd_pcm_hw_param_t var, int *dir)
 178 {
 179         if (hw_is_mask(var)) {
 180                 if (dir)
 181                         *dir = 0;
 182                 return snd_mask_max(hw_param_mask_c(params, var));
 183         }
 184         if (hw_is_interval(var)) {
 185                 const struct snd_interval *i = hw_param_interval_c(params, var);
 186                 if (dir)
 187                         *dir = - (int) i->openmax;
 188                 return snd_interval_max(i);
 189         }
 190         return -EINVAL;
 191 }
 192
 193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
 194                                   snd_pcm_hw_param_t var,
 195                                   const struct snd_mask *val)
 196 {
 197         int changed;
 198         changed = snd_mask_refine(hw_param_mask(params, var), val);
 199         if (changed) {
 200                 params->cmask |= 1 << var;
 201                 params->rmask |= 1 << var;
 202         }
 203         return changed;
 204 }
 205
 206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
 207                                  struct snd_pcm_hw_params *params,
 208                                  snd_pcm_hw_param_t var,
 209                                  const struct snd_mask *val)
 210 {
 211         int changed = _snd_pcm_hw_param_mask(params, var, val);
 212         if (changed < 0)
 213                 return changed;
 214         if (params->rmask) {
 215                 int err = snd_pcm_hw_refine(pcm, params);
 216                 if (err < 0)
 217                         return err;
 218         }
 219         return 0;
 220 }
 221
 222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
 223                                  snd_pcm_hw_param_t var, unsigned int val,
 224                                  int dir)
 225 {
 226         int changed;
 227         int open = 0;
 228         if (dir) {
 229                 if (dir > 0) {
 230                         open = 1;
 231                 } else if (dir < 0) {
 232                         if (val > 0) {
 233                                 open = 1;
 234                                 val--;
 235                         }
 236                 }
 237         }
 238         if (hw_is_mask(var))
 239                 changed = snd_mask_refine_min(hw_param_mask(params, var),
 240                                               val + !!open);
 241         else if (hw_is_interval(var))
 242                 changed = snd_interval_refine_min(hw_param_interval(params, var),
 243                                                   val, open);
 244         else
 245                 return -EINVAL;
 246         if (changed) {
 247                 params->cmask |= 1 << var;
 248                 params->rmask |= 1 << var;
 249         }
 250         return changed;
 251 }
 252
 253 /**
 254  * snd_pcm_hw_param_min
 255  * @pcm: PCM instance
 256  * @params: the hw_params instance
 257  * @var: parameter to retrieve
 258  * @val: minimal value
 259  * @dir: pointer to the direction (-1,0,1) or NULL
 260  *
 261  * Inside configuration space defined by PARAMS remove from PAR all
 262  * values < VAL. Reduce configuration space accordingly.
 263  * Return new minimum or -EINVAL if the configuration space is empty
 264  */
 265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
 266                                 struct snd_pcm_hw_params *params,
 267                                 snd_pcm_hw_param_t var, unsigned int val,
 268                                 int *dir)
 269 {
 270         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
 271         if (changed < 0)
 272                 return changed;
 273         if (params->rmask) {
 274                 int err = snd_pcm_hw_refine(pcm, params);
 275                 if (err < 0)
 276                         return err;
 277         }
 278         return snd_pcm_hw_param_value_min(params, var, dir);
 279 }
 280
 281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
 282                                  snd_pcm_hw_param_t var, unsigned int val,
 283                                  int dir)
 284 {
 285         int changed;
 286         int open = 0;
 287         if (dir) {
 288                 if (dir < 0) {
 289                         open = 1;
 290                 } else if (dir > 0) {
 291                         open = 1;
 292                         val++;
 293                 }
 294         }
 295         if (hw_is_mask(var)) {
 296                 if (val == 0 && open) {
 297                         snd_mask_none(hw_param_mask(params, var));
 298                         changed = -EINVAL;
 299                 } else
 300                         changed = snd_mask_refine_max(hw_param_mask(params, var),
 301                                                       val - !!open);
 302         } else if (hw_is_interval(var))
 303                 changed = snd_interval_refine_max(hw_param_interval(params, var),
 304                                                   val, open);
 305         else
 306                 return -EINVAL;
 307         if (changed) {
 308                 params->cmask |= 1 << var;
 309                 params->rmask |= 1 << var;
 310         }
 311         return changed;
 312 }
 313
 314 /**
 315  * snd_pcm_hw_param_max
 316  * @pcm: PCM instance
 317  * @params: the hw_params instance
 318  * @var: parameter to retrieve
 319  * @val: maximal value
 320  * @dir: pointer to the direction (-1,0,1) or NULL
 321  *
 322  * Inside configuration space defined by PARAMS remove from PAR all
 323  *  values >= VAL + 1. Reduce configuration space accordingly.
 324  *  Return new maximum or -EINVAL if the configuration space is empty
 325  */
 326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
 327                                 struct snd_pcm_hw_params *params,
 328                                 snd_pcm_hw_param_t var, unsigned int val,
 329                                 int *dir)
 330 {
 331         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
 332         if (changed < 0)
 333                 return changed;
 334         if (params->rmask) {
 335                 int err = snd_pcm_hw_refine(pcm, params);
 336                 if (err < 0)
 337                         return err;
 338         }
 339         return snd_pcm_hw_param_value_max(params, var, dir);
 340 }
 341
 342 static int boundary_sub(int a, int adir,
 343                         int b, int bdir,
 344                         int *c, int *cdir)
 345 {
 346         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
 347         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
 348         *c = a - b;
 349         *cdir = adir - bdir;
 350         if (*cdir == -2) {
 351                 (*c)--;
 352         } else if (*cdir == 2) {
 353                 (*c)++;
 354         }
 355         return 0;
 356 }
 357
 358 static int boundary_lt(unsigned int a, int adir,
 359                        unsigned int b, int bdir)
 360 {
 361         if (adir < 0) {
 362                 a--;
 363                 adir = 1;
 364         } else if (adir > 0)
 365                 adir = 1;
 366         if (bdir < 0) {
 367                 b--;
 368                 bdir = 1;
 369         } else if (bdir > 0)
 370                 bdir = 1;
 371         return a < b || (a == b && adir < bdir);
 372 }
 373
 374 /* Return 1 if min is nearer to best than max */
 375 static int boundary_nearer(int min, int mindir,
 376                            int best, int bestdir,
 377                            int max, int maxdir)
 378 {
 379         int dmin, dmindir;
 380         int dmax, dmaxdir;
 381         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
 382         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
 383         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
 384 }
 385
 386 /**
 387  * snd_pcm_hw_param_near
 388  * @pcm: PCM instance
 389  * @params: the hw_params instance
 390  * @var: parameter to retrieve
 391  * @best: value to set
 392  * @dir: pointer to the direction (-1,0,1) or NULL
 393  *
 394  * Inside configuration space defined by PARAMS set PAR to the available value
 395  * nearest to VAL. Reduce configuration space accordingly.
 396  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
 397  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
 398  * Return the value found.
 399   */
 400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 401                                  struct snd_pcm_hw_params *params,
 402                                  snd_pcm_hw_param_t var, unsigned int best,
 403                                  int *dir)
 404 {
 405         struct snd_pcm_hw_params *save = NULL;
 406         int v;
 407         unsigned int saved_min;
 408         int last = 0;
 409         int min, max;
 410         int mindir, maxdir;
 411         int valdir = dir ? *dir : 0;
 412         /* FIXME */
 413         if (best > INT_MAX)
 414                 best = INT_MAX;
 415         min = max = best;
 416         mindir = maxdir = valdir;
 417         if (maxdir > 0)
 418                 maxdir = 0;
 419         else if (maxdir == 0)
 420                 maxdir = -1;
 421         else {
 422                 maxdir = 1;
 423                 max--;
 424         }
 425         save = kmalloc(sizeof(*save), GFP_KERNEL);
 426         if (save == NULL)
 427                 return -ENOMEM;
 428         *save = *params;
 429         saved_min = min;
 430         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
 431         if (min >= 0) {
 432                 struct snd_pcm_hw_params *params1;
 433                 if (max < 0)
 434                         goto _end;
 435                 if ((unsigned int)min == saved_min && mindir == valdir)
 436                         goto _end;
 437                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
 438                 if (params1 == NULL) {
 439                         kfree(save);
 440                         return -ENOMEM;
 441                 }
 442                 *params1 = *save;
 443                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
 444                 if (max < 0) {
 445                         kfree(params1);
 446                         goto _end;
 447                 }
 448                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
 449                         *params = *params1;
 450                         last = 1;
 451                 }
 452                 kfree(params1);
 453         } else {
 454                 *params = *save;
 455                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
 456                 if (max < 0) {
 457                         kfree(save);
 458                         return max;
 459                 }
 460                 last = 1;
 461         }
 462  _end:
 463         kfree(save);
 464         if (last)
 465                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 466         else
 467                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 468         snd_BUG_ON(v < 0);
 469         return v;
 470 }
 471
 472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 473                                  snd_pcm_hw_param_t var, unsigned int val,
 474                                  int dir)
 475 {
 476         int changed;
 477         if (hw_is_mask(var)) {
 478                 struct snd_mask *m = hw_param_mask(params, var);
 479                 if (val == 0 && dir < 0) {
 480                         changed = -EINVAL;
 481                         snd_mask_none(m);
 482                 } else {
 483                         if (dir > 0)
 484                                 val++;
 485                         else if (dir < 0)
 486                                 val--;
 487                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 488                 }
 489         } else if (hw_is_interval(var)) {
 490                 struct snd_interval *i = hw_param_interval(params, var);
 491                 if (val == 0 && dir < 0) {
 492                         changed = -EINVAL;
 493                         snd_interval_none(i);
 494                 } else if (dir == 0)
 495                         changed = snd_interval_refine_set(i, val);
 496                 else {
 497                         struct snd_interval t;
 498                         t.openmin = 1;
 499                         t.openmax = 1;
 500                         t.empty = 0;
 501                         t.integer = 0;
 502                         if (dir < 0) {
 503                                 t.min = val - 1;
 504                                 t.max = val;
 505                         } else {
 506                                 t.min = val;
 507                                 t.max = val+1;
 508                         }
 509                         changed = snd_interval_refine(i, &t);
 510                 }
 511         } else
 512                 return -EINVAL;
 513         if (changed) {
 514                 params->cmask |= 1 << var;
 515                 params->rmask |= 1 << var;
 516         }
 517         return changed;
 518 }
 519
 520 /**
 521  * snd_pcm_hw_param_set
 522  * @pcm: PCM instance
 523  * @params: the hw_params instance
 524  * @var: parameter to retrieve
 525  * @val: value to set
 526  * @dir: pointer to the direction (-1,0,1) or NULL
 527  *
 528  * Inside configuration space defined by PARAMS remove from PAR all
 529  * values != VAL. Reduce configuration space accordingly.
 530  *  Return VAL or -EINVAL if the configuration space is empty
 531  */
 532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 533                                 struct snd_pcm_hw_params *params,
 534                                 snd_pcm_hw_param_t var, unsigned int val,
 535                                 int dir)
 536 {
 537         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 538         if (changed < 0)
 539                 return changed;
 540         if (params->rmask) {
 541                 int err = snd_pcm_hw_refine(pcm, params);
 542                 if (err < 0)
 543                         return err;
 544         }
 545         return snd_pcm_hw_param_value(params, var, NULL);
 546 }
 547
 548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 549                                         snd_pcm_hw_param_t var)
 550 {
 551         int changed;
 552         changed = snd_interval_setinteger(hw_param_interval(params, var));
 553         if (changed) {
 554                 params->cmask |= 1 << var;
 555                 params->rmask |= 1 << var;
 556         }
 557         return changed;
 558 }
 559
 560 /*
 561  * plugin
 562  */
 563
 564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 566 {
 567         struct snd_pcm_runtime *runtime = substream->runtime;
 568         struct snd_pcm_plugin *plugin, *next;
 569
 570         plugin = runtime->oss.plugin_first;
 571         while (plugin) {
 572                 next = plugin->next;
 573                 snd_pcm_plugin_free(plugin);
 574                 plugin = next;
 575         }
 576         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 577         return 0;
 578 }
 579
 580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 581 {
 582         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 583         plugin->next = runtime->oss.plugin_first;
 584         plugin->prev = NULL;
 585         if (runtime->oss.plugin_first) {
 586                 runtime->oss.plugin_first->prev = plugin;
 587                 runtime->oss.plugin_first = plugin;
 588         } else {
 589                 runtime->oss.plugin_last =
 590                 runtime->oss.plugin_first = plugin;
 591         }
 592         return 0;
 593 }
 594
 595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 596 {
 597         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 598         plugin->next = NULL;
 599         plugin->prev = runtime->oss.plugin_last;
 600         if (runtime->oss.plugin_last) {
 601                 runtime->oss.plugin_last->next = plugin;
 602                 runtime->oss.plugin_last = plugin;
 603         } else {
 604                 runtime->oss.plugin_last =
 605                 runtime->oss.plugin_first = plugin;
 606         }
 607         return 0;
 608 }
 609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 610
 611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 612 {
 613         struct snd_pcm_runtime *runtime = substream->runtime;
 614         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 615         long bytes = frames_to_bytes(runtime, frames);
 616         if (buffer_size == runtime->oss.buffer_bytes)
 617                 return bytes;
 618 #if BITS_PER_LONG >= 64
 619         return runtime->oss.buffer_bytes * bytes / buffer_size;
 620 #else
 621         {
 622                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 623                 return div_u64(bsize, buffer_size);
 624         }
 625 #endif
 626 }
 627
 628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 629 {
 630         struct snd_pcm_runtime *runtime = substream->runtime;
 631         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 632         if (buffer_size == runtime->oss.buffer_bytes)
 633                 return bytes_to_frames(runtime, bytes);
 634         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 635 }
 636
 637 static inline
 638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
 639 {
 640         return runtime->hw_ptr_interrupt;
 641 }
 642
 643 /* define extended formats in the recent OSS versions (if any) */
 644 /* linear formats */
 645 #define AFMT_S32_LE      0x00001000
 646 #define AFMT_S32_BE      0x00002000
 647 #define AFMT_S24_LE      0x00008000
 648 #define AFMT_S24_BE      0x00010000
 649 #define AFMT_S24_PACKED  0x00040000
 650
 651 /* other supported formats */
 652 #define AFMT_FLOAT       0x00004000
 653 #define AFMT_SPDIF_RAW   0x00020000
 654
 655 /* unsupported formats */
 656 #define AFMT_AC3         0x00000400
 657 #define AFMT_VORBIS      0x00000800
 658
 659 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
 660 {
 661         switch (format) {
 662         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 663         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 664         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 665         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 666         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 667         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 668         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 669         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 670         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 671         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 672         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 673         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 674         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 675         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 676         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 677         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 678         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 679         default:                return SNDRV_PCM_FORMAT_U8;
 680         }
 681 }
 682
 683 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
 684 {
 685         switch (format) {
 686         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 687         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 688         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 689         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 690         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 691         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 692         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 693         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 694         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 695         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 696         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 697         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 698         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 699         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 700         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 701         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 702         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 703         default:                        return -EINVAL;
 704         }
 705 }
 706
 707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 708                                    struct snd_pcm_hw_params *oss_params,
 709                                    struct snd_pcm_hw_params *slave_params)
 710 {
 711         size_t s;
 712         size_t oss_buffer_size, oss_period_size, oss_periods;
 713         size_t min_period_size, max_period_size;
 714         struct snd_pcm_runtime *runtime = substream->runtime;
 715         size_t oss_frame_size;
 716
 717         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 718                          params_channels(oss_params) / 8;
 719
 720         oss_buffer_size = snd_pcm_plug_client_size(substream,
 721                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 722         oss_buffer_size = 1 << ld2(oss_buffer_size);
 723         if (atomic_read(&substream->mmap_count)) {
 724                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 725                         oss_buffer_size = runtime->oss.mmap_bytes;
 726         }
 727
 728         if (substream->oss.setup.period_size > 16)
 729                 oss_period_size = substream->oss.setup.period_size;
 730         else if (runtime->oss.fragshift) {
 731                 oss_period_size = 1 << runtime->oss.fragshift;
 732                 if (oss_period_size > oss_buffer_size / 2)
 733                         oss_period_size = oss_buffer_size / 2;
 734         } else {
 735                 int sd;
 736                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 737
 738                 oss_period_size = oss_buffer_size;
 739                 do {
 740                         oss_period_size /= 2;
 741                 } while (oss_period_size > bytes_per_sec);
 742                 if (runtime->oss.subdivision == 0) {
 743                         sd = 4;
 744                         if (oss_period_size / sd > 4096)
 745                                 sd *= 2;
 746                         if (oss_period_size / sd < 4096)
 747                                 sd = 1;
 748                 } else
 749                         sd = runtime->oss.subdivision;
 750                 oss_period_size /= sd;
 751                 if (oss_period_size < 16)
 752                         oss_period_size = 16;
 753         }
 754
 755         min_period_size = snd_pcm_plug_client_size(substream,
 756                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 757         min_period_size *= oss_frame_size;
 758         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 759         if (oss_period_size < min_period_size)
 760                 oss_period_size = min_period_size;
 761
 762         max_period_size = snd_pcm_plug_client_size(substream,
 763                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 764         max_period_size *= oss_frame_size;
 765         max_period_size = 1 << ld2(max_period_size);
 766         if (oss_period_size > max_period_size)
 767                 oss_period_size = max_period_size;
 768
 769         oss_periods = oss_buffer_size / oss_period_size;
 770
 771         if (substream->oss.setup.periods > 1)
 772                 oss_periods = substream->oss.setup.periods;
 773
 774         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 775         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 776                 s = runtime->oss.maxfrags;
 777         if (oss_periods > s)
 778                 oss_periods = s;
 779
 780         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 781         if (s < 2)
 782                 s = 2;
 783         if (oss_periods < s)
 784                 oss_periods = s;
 785
 786         while (oss_period_size * oss_periods > oss_buffer_size)
 787                 oss_period_size /= 2;
 788
 789         if (oss_period_size < 16)
 790                 return -EINVAL;
 791         runtime->oss.period_bytes = oss_period_size;
 792         runtime->oss.period_frames = 1;
 793         runtime->oss.periods = oss_periods;
 794         return 0;
 795 }
 796
 797 static int choose_rate(struct snd_pcm_substream *substream,
 798                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 799 {
 800         struct snd_interval *it;
 801         struct snd_pcm_hw_params *save;
 802         unsigned int rate, prev;
 803
 804         save = kmalloc(sizeof(*save), GFP_KERNEL);
 805         if (save == NULL)
 806                 return -ENOMEM;
 807         *save = *params;
 808         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 809
 810         /* try multiples of the best rate */
 811         rate = best_rate;
 812         for (;;) {
 813                 if (it->max < rate || (it->max == rate && it->openmax))
 814                         break;
 815                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 816                         int ret;
 817                         ret = snd_pcm_hw_param_set(substream, params,
 818                                                    SNDRV_PCM_HW_PARAM_RATE,
 819                                                    rate, 0);
 820                         if (ret == (int)rate) {
 821                                 kfree(save);
 822                                 return rate;
 823                         }
 824                         *params = *save;
 825                 }
 826                 prev = rate;
 827                 rate += best_rate;
 828                 if (rate <= prev)
 829                         break;
 830         }
 831
 832         /* not found, use the nearest rate */
 833         kfree(save);
 834         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 835 }
 836
 837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 838 {
 839         struct snd_pcm_runtime *runtime = substream->runtime;
 840         struct snd_pcm_hw_params *params, *sparams;
 841         struct snd_pcm_sw_params *sw_params;
 842         ssize_t oss_buffer_size, oss_period_size;
 843         size_t oss_frame_size;
 844         int err;
 845         int direct;
 846         snd_pcm_format_t format, sformat;
 847         int n;
 848         struct snd_mask sformat_mask;
 849         struct snd_mask mask;
 850
 851         if (mutex_lock_interruptible(&runtime->oss.params_lock))
 852                 return -EINTR;
 853         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 854         params = kmalloc(sizeof(*params), GFP_KERNEL);
 855         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 856         if (!sw_params || !params || !sparams) {
 857                 pcm_dbg(substream->pcm, "No memory\n");
 858                 err = -ENOMEM;
 859                 goto failure;
 860         }
 861
 862         if (atomic_read(&substream->mmap_count))
 863                 direct = 1;
 864         else
 865                 direct = substream->oss.setup.direct;
 866
 867         _snd_pcm_hw_params_any(sparams);
 868         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 869         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 870         snd_mask_none(&mask);
 871         if (atomic_read(&substream->mmap_count))
 872                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 873         else {
 874                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 875                 if (!direct)
 876                         snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 877         }
 878         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 879         if (err < 0) {
 880                 pcm_dbg(substream->pcm, "No usable accesses\n");
 881                 err = -EINVAL;
 882                 goto failure;
 883         }
 884         choose_rate(substream, sparams, runtime->oss.rate);
 885         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 886
 887         format = snd_pcm_oss_format_from(runtime->oss.format);
 888
 889         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 890         if (direct)
 891                 sformat = format;
 892         else
 893                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 894
 895         if ((__force int)sformat < 0 ||
 896             !snd_mask_test(&sformat_mask, (__force int)sformat)) {
 897                 for (sformat = (__force snd_pcm_format_t)0;
 898                      (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
 899                      sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
 900                         if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
 901                             snd_pcm_oss_format_to(sformat) >= 0)
 902                                 break;
 903                 }
 904                 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
 905                         pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
 906                         err = -EINVAL;
 907                         goto failure;
 908                 }
 909         }
 910         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
 911         if (err < 0)
 912                 goto failure;
 913
 914         if (direct) {
 915                 memcpy(params, sparams, sizeof(*params));
 916         } else {
 917                 _snd_pcm_hw_params_any(params);
 918                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 919                                       (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 920                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 921                                       (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
 922                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 923                                       runtime->oss.channels, 0);
 924                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 925                                       runtime->oss.rate, 0);
 926                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 927                          params_access(params), params_format(params),
 928                          params_channels(params), params_rate(params));
 929         }
 930         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 931                  params_access(sparams), params_format(sparams),
 932                  params_channels(sparams), params_rate(sparams));
 933
 934         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 935                          params_channels(params) / 8;
 936
 937 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 938         snd_pcm_oss_plugin_clear(substream);
 939         if (!direct) {
 940                 /* add necessary plugins */
 941                 snd_pcm_oss_plugin_clear(substream);
 942                 if ((err = snd_pcm_plug_format_plugins(substream,
 943                                                        params,
 944                                                        sparams)) < 0) {
 945                         pcm_dbg(substream->pcm,
 946                                 "snd_pcm_plug_format_plugins failed: %i\n", err);
 947                         snd_pcm_oss_plugin_clear(substream);
 948                         goto failure;
 949                 }
 950                 if (runtime->oss.plugin_first) {
 951                         struct snd_pcm_plugin *plugin;
 952                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 953                                 pcm_dbg(substream->pcm,
 954                                         "snd_pcm_plugin_build_io failed: %i\n", err);
 955                                 snd_pcm_oss_plugin_clear(substream);
 956                                 goto failure;
 957                         }
 958                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 959                                 err = snd_pcm_plugin_append(plugin);
 960                         } else {
 961                                 err = snd_pcm_plugin_insert(plugin);
 962                         }
 963                         if (err < 0) {
 964                                 snd_pcm_oss_plugin_clear(substream);
 965                                 goto failure;
 966                         }
 967                 }
 968         }
 969 #endif
 970
 971         err = snd_pcm_oss_period_size(substream, params, sparams);
 972         if (err < 0)
 973                 goto failure;
 974
 975         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 976         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 977         if (err < 0)
 978                 goto failure;
 979
 980         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 981                                      runtime->oss.periods, NULL);
 982         if (err < 0)
 983                 goto failure;
 984
 985         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 986
 987         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 988                 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
 989                 goto failure;
 990         }
 991
 992         memset(sw_params, 0, sizeof(*sw_params));
 993         if (runtime->oss.trigger) {
 994                 sw_params->start_threshold = 1;
 995         } else {
 996                 sw_params->start_threshold = runtime->boundary;
 997         }
 998         if (atomic_read(&substream->mmap_count) ||
 999             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1000                 sw_params->stop_threshold = runtime->boundary;
1001         else
1002                 sw_params->stop_threshold = runtime->buffer_size;
1003         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1004         sw_params->period_step = 1;
1005         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1006                 1 : runtime->period_size;
1007         if (atomic_read(&substream->mmap_count) ||
1008             substream->oss.setup.nosilence) {
1009                 sw_params->silence_threshold = 0;
1010                 sw_params->silence_size = 0;
1011         } else {
1012                 snd_pcm_uframes_t frames;
1013                 frames = runtime->period_size + 16;
1014                 if (frames > runtime->buffer_size)
1015                         frames = runtime->buffer_size;
1016                 sw_params->silence_threshold = frames;
1017                 sw_params->silence_size = frames;
1018         }
1019
1020         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1021                 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1022                 goto failure;
1023         }
1024
1025         runtime->oss.periods = params_periods(sparams);
1026         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1027         if (oss_period_size < 0) {
1028                 err = -EINVAL;
1029                 goto failure;
1030         }
1031 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1032         if (runtime->oss.plugin_first) {
1033                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1034                 if (err < 0)
1035                         goto failure;
1036         }
1037 #endif
1038         oss_period_size *= oss_frame_size;
1039
1040         oss_buffer_size = oss_period_size * runtime->oss.periods;
1041         if (oss_buffer_size < 0) {
1042                 err = -EINVAL;
1043                 goto failure;
1044         }
1045
1046         runtime->oss.period_bytes = oss_period_size;
1047         runtime->oss.buffer_bytes = oss_buffer_size;
1048
1049         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1050                  runtime->oss.period_bytes,
1051                  runtime->oss.buffer_bytes);
1052         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1053                  params_period_size(sparams),
1054                  params_buffer_size(sparams));
1055
1056         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1057         runtime->oss.channels = params_channels(params);
1058         runtime->oss.rate = params_rate(params);
1059
1060         vfree(runtime->oss.buffer);
1061         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1062         if (!runtime->oss.buffer) {
1063                 err = -ENOMEM;
1064                 goto failure;
1065         }
1066
1067         runtime->oss.params = 0;
1068         runtime->oss.prepare = 1;
1069         runtime->oss.buffer_used = 0;
1070         if (runtime->dma_area)
1071                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1072
1073         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1074
1075         err = 0;
1076 failure:
1077         kfree(sw_params);
1078         kfree(params);
1079         kfree(sparams);
1080         mutex_unlock(&runtime->oss.params_lock);
1081         return err;
1082 }
1083
1084 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1085 {
1086         int idx, err;
1087         struct snd_pcm_substream *asubstream = NULL, *substream;
1088
1089         for (idx = 0; idx < 2; idx++) {
1090                 substream = pcm_oss_file->streams[idx];
1091                 if (substream == NULL)
1092                         continue;
1093                 if (asubstream == NULL)
1094                         asubstream = substream;
1095                 if (substream->runtime->oss.params) {
1096                         err = snd_pcm_oss_change_params(substream);
1097                         if (err < 0)
1098                                 return err;
1099                 }
1100         }
1101         if (!asubstream)
1102                 return -EIO;
1103         if (r_substream)
1104                 *r_substream = asubstream;
1105         return 0;
1106 }
1107
1108 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1109 {
1110         int err;
1111         struct snd_pcm_runtime *runtime = substream->runtime;
1112
1113         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1114         if (err < 0) {
1115                 pcm_dbg(substream->pcm,
1116                         "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1117                 return err;
1118         }
1119         runtime->oss.prepare = 0;
1120         runtime->oss.prev_hw_ptr_period = 0;
1121         runtime->oss.period_ptr = 0;
1122         runtime->oss.buffer_used = 0;
1123
1124         return 0;
1125 }
1126
1127 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1128 {
1129         struct snd_pcm_runtime *runtime;
1130         int err;
1131
1132         if (substream == NULL)
1133                 return 0;
1134         runtime = substream->runtime;
1135         if (runtime->oss.params) {
1136                 err = snd_pcm_oss_change_params(substream);
1137                 if (err < 0)
1138                         return err;
1139         }
1140         if (runtime->oss.prepare) {
1141                 err = snd_pcm_oss_prepare(substream);
1142                 if (err < 0)
1143                         return err;
1144         }
1145         return 0;
1146 }
1147
1148 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1149 {
1150         struct snd_pcm_runtime *runtime;
1151         snd_pcm_uframes_t frames;
1152         int err = 0;
1153
1154         while (1) {
1155                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1156                 if (err < 0)
1157                         break;
1158                 runtime = substream->runtime;
1159                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1160                         break;
1161                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1162                 /* until avail(delay) <= buffer_size */
1163                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1164                 frames /= runtime->period_size;
1165                 frames *= runtime->period_size;
1166                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1167                 if (err < 0)
1168                         break;
1169         }
1170         return err;
1171 }
1172
1173 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1174 {
1175         struct snd_pcm_runtime *runtime = substream->runtime;
1176         int ret;
1177         while (1) {
1178                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1179                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1180 #ifdef OSS_DEBUG
1181                         pcm_dbg(substream->pcm,
1182                                 "pcm_oss: write: recovering from %s\n",
1183                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1184                                 "XRUN" : "SUSPEND");
1185 #endif
1186                         ret = snd_pcm_oss_prepare(substream);
1187                         if (ret < 0)
1188                                 break;
1189                 }
1190                 if (in_kernel) {
1191                         mm_segment_t fs;
1192                         fs = snd_enter_user();
1193                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1194                         snd_leave_user(fs);
1195                 } else {
1196                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1197                 }
1198                 if (ret != -EPIPE && ret != -ESTRPIPE)
1199                         break;
1200                 /* test, if we can't store new data, because the stream */
1201                 /* has not been started */
1202                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1203                         return -EAGAIN;
1204         }
1205         return ret;
1206 }
1207
1208 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1209 {
1210         struct snd_pcm_runtime *runtime = substream->runtime;
1211         snd_pcm_sframes_t delay;
1212         int ret;
1213         while (1) {
1214                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1215                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1216 #ifdef OSS_DEBUG
1217                         pcm_dbg(substream->pcm,
1218                                 "pcm_oss: read: recovering from %s\n",
1219                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1220                                 "XRUN" : "SUSPEND");
1221 #endif
1222                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1223                         if (ret < 0)
1224                                 break;
1225                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1226                         ret = snd_pcm_oss_prepare(substream);
1227                         if (ret < 0)
1228                                 break;
1229                 }
1230                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1231                 if (ret < 0)
1232                         break;
1233                 if (in_kernel) {
1234                         mm_segment_t fs;
1235                         fs = snd_enter_user();
1236                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1237                         snd_leave_user(fs);
1238                 } else {
1239                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1240                 }
1241                 if (ret == -EPIPE) {
1242                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1243                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1244                                 if (ret < 0)
1245                                         break;
1246                         }
1247                         continue;
1248                 }
1249                 if (ret != -ESTRPIPE)
1250                         break;
1251         }
1252         return ret;
1253 }
1254
1255 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1256 {
1257         struct snd_pcm_runtime *runtime = substream->runtime;
1258         int ret;
1259         while (1) {
1260                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1261                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1262 #ifdef OSS_DEBUG
1263                         pcm_dbg(substream->pcm,
1264                                 "pcm_oss: writev: recovering from %s\n",
1265                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1266                                 "XRUN" : "SUSPEND");
1267 #endif
1268                         ret = snd_pcm_oss_prepare(substream);
1269                         if (ret < 0)
1270                                 break;
1271                 }
1272                 if (in_kernel) {
1273                         mm_segment_t fs;
1274                         fs = snd_enter_user();
1275                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1276                         snd_leave_user(fs);
1277                 } else {
1278                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279                 }
1280                 if (ret != -EPIPE && ret != -ESTRPIPE)
1281                         break;
1282
1283                 /* test, if we can't store new data, because the stream */
1284                 /* has not been started */
1285                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1286                         return -EAGAIN;
1287         }
1288         return ret;
1289 }
1290
1291 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1292 {
1293         struct snd_pcm_runtime *runtime = substream->runtime;
1294         int ret;
1295         while (1) {
1296                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1297                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1298 #ifdef OSS_DEBUG
1299                         pcm_dbg(substream->pcm,
1300                                 "pcm_oss: readv: recovering from %s\n",
1301                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1302                                 "XRUN" : "SUSPEND");
1303 #endif
1304                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1305                         if (ret < 0)
1306                                 break;
1307                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1308                         ret = snd_pcm_oss_prepare(substream);
1309                         if (ret < 0)
1310                                 break;
1311                 }
1312                 if (in_kernel) {
1313                         mm_segment_t fs;
1314                         fs = snd_enter_user();
1315                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1316                         snd_leave_user(fs);
1317                 } else {
1318                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1319                 }
1320                 if (ret != -EPIPE && ret != -ESTRPIPE)
1321                         break;
1322         }
1323         return ret;
1324 }
1325
1326 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1327 {
1328         struct snd_pcm_runtime *runtime = substream->runtime;
1329         snd_pcm_sframes_t frames, frames1;
1330 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1331         if (runtime->oss.plugin_first) {
1332                 struct snd_pcm_plugin_channel *channels;
1333                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1334                 if (!in_kernel) {
1335                         if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1336                                 return -EFAULT;
1337                         buf = runtime->oss.buffer;
1338                 }
1339                 frames = bytes / oss_frame_bytes;
1340                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1341                 if (frames1 < 0)
1342                         return frames1;
1343                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1344                 if (frames1 <= 0)
1345                         return frames1;
1346                 bytes = frames1 * oss_frame_bytes;
1347         } else
1348 #endif
1349         {
1350                 frames = bytes_to_frames(runtime, bytes);
1351                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1352                 if (frames1 <= 0)
1353                         return frames1;
1354                 bytes = frames_to_bytes(runtime, frames1);
1355         }
1356         return bytes;
1357 }
1358
1359 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1360 {
1361         size_t xfer = 0;
1362         ssize_t tmp;
1363         struct snd_pcm_runtime *runtime = substream->runtime;
1364
1365         if (atomic_read(&substream->mmap_count))
1366                 return -ENXIO;
1367
1368         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1369                 return tmp;
1370         mutex_lock(&runtime->oss.params_lock);
1371         while (bytes > 0) {
1372                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1373                         tmp = bytes;
1374                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1375                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1376                         if (tmp > 0) {
1377                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1378                                         tmp = -EFAULT;
1379                                         goto err;
1380                                 }
1381                         }
1382                         runtime->oss.buffer_used += tmp;
1383                         buf += tmp;
1384                         bytes -= tmp;
1385                         xfer += tmp;
1386                         if (substream->oss.setup.partialfrag ||
1387                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1388                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1389                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1390                                 if (tmp <= 0)
1391                                         goto err;
1392                                 runtime->oss.bytes += tmp;
1393                                 runtime->oss.period_ptr += tmp;
1394                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1395                                 if (runtime->oss.period_ptr == 0 ||
1396                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1397                                         runtime->oss.buffer_used = 0;
1398                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1399                                         tmp = -EAGAIN;
1400                                         goto err;
1401                                 }
1402                         }
1403                 } else {
1404                         tmp = snd_pcm_oss_write2(substream,
1405                                                  (const char __force *)buf,
1406                                                  runtime->oss.period_bytes, 0);
1407                         if (tmp <= 0)
1408                                 goto err;
1409                         runtime->oss.bytes += tmp;
1410                         buf += tmp;
1411                         bytes -= tmp;
1412                         xfer += tmp;
1413                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1414                             tmp != runtime->oss.period_bytes)
1415                                 break;
1416                 }
1417         }
1418         mutex_unlock(&runtime->oss.params_lock);
1419         return xfer;
1420
1421  err:
1422         mutex_unlock(&runtime->oss.params_lock);
1423         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1424 }
1425
1426 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1427 {
1428         struct snd_pcm_runtime *runtime = substream->runtime;
1429         snd_pcm_sframes_t frames, frames1;
1430 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1431         char __user *final_dst = (char __force __user *)buf;
1432         if (runtime->oss.plugin_first) {
1433                 struct snd_pcm_plugin_channel *channels;
1434                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1435                 if (!in_kernel)
1436                         buf = runtime->oss.buffer;
1437                 frames = bytes / oss_frame_bytes;
1438                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1439                 if (frames1 < 0)
1440                         return frames1;
1441                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1442                 if (frames1 <= 0)
1443                         return frames1;
1444                 bytes = frames1 * oss_frame_bytes;
1445                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1446                         return -EFAULT;
1447         } else
1448 #endif
1449         {
1450                 frames = bytes_to_frames(runtime, bytes);
1451                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1452                 if (frames1 <= 0)
1453                         return frames1;
1454                 bytes = frames_to_bytes(runtime, frames1);
1455         }
1456         return bytes;
1457 }
1458
1459 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1460 {
1461         size_t xfer = 0;
1462         ssize_t tmp;
1463         struct snd_pcm_runtime *runtime = substream->runtime;
1464
1465         if (atomic_read(&substream->mmap_count))
1466                 return -ENXIO;
1467
1468         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1469                 return tmp;
1470         mutex_lock(&runtime->oss.params_lock);
1471         while (bytes > 0) {
1472                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1473                         if (runtime->oss.buffer_used == 0) {
1474                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1475                                 if (tmp <= 0)
1476                                         goto err;
1477                                 runtime->oss.bytes += tmp;
1478                                 runtime->oss.period_ptr = tmp;
1479                                 runtime->oss.buffer_used = tmp;
1480                         }
1481                         tmp = bytes;
1482                         if ((size_t) tmp > runtime->oss.buffer_used)
1483                                 tmp = runtime->oss.buffer_used;
1484                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1485                                 tmp = -EFAULT;
1486                                 goto err;
1487                         }
1488                         buf += tmp;
1489                         bytes -= tmp;
1490                         xfer += tmp;
1491                         runtime->oss.buffer_used -= tmp;
1492                 } else {
1493                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1494                                                 runtime->oss.period_bytes, 0);
1495                         if (tmp <= 0)
1496                                 goto err;
1497                         runtime->oss.bytes += tmp;
1498                         buf += tmp;
1499                         bytes -= tmp;
1500                         xfer += tmp;
1501                 }
1502         }
1503         mutex_unlock(&runtime->oss.params_lock);
1504         return xfer;
1505
1506  err:
1507         mutex_unlock(&runtime->oss.params_lock);
1508         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1509 }
1510
1511 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1512 {
1513         struct snd_pcm_substream *substream;
1514         struct snd_pcm_runtime *runtime;
1515         int i;
1516
1517         for (i = 0; i < 2; i++) {
1518                 substream = pcm_oss_file->streams[i];
1519                 if (!substream)
1520                         continue;
1521                 runtime = substream->runtime;
1522                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1523                 runtime->oss.prepare = 1;
1524                 runtime->oss.buffer_used = 0;
1525                 runtime->oss.prev_hw_ptr_period = 0;
1526                 runtime->oss.period_ptr = 0;
1527         }
1528         return 0;
1529 }
1530
1531 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1532 {
1533         struct snd_pcm_substream *substream;
1534         int err;
1535
1536         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1537         if (substream != NULL) {
1538                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1539                         return err;
1540                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1541         }
1542         /* note: all errors from the start action are ignored */
1543         /* OSS apps do not know, how to handle them */
1544         return 0;
1545 }
1546
1547 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1548 {
1549         struct snd_pcm_runtime *runtime;
1550         ssize_t result = 0;
1551         snd_pcm_state_t state;
1552         long res;
1553         wait_queue_t wait;
1554
1555         runtime = substream->runtime;
1556         init_waitqueue_entry(&wait, current);
1557         add_wait_queue(&runtime->sleep, &wait);
1558 #ifdef OSS_DEBUG
1559         pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1560 #endif
1561         while (1) {
1562                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1563                 if (result > 0) {
1564                         runtime->oss.buffer_used = 0;
1565                         result = 0;
1566                         break;
1567                 }
1568                 if (result != 0 && result != -EAGAIN)
1569                         break;
1570                 result = 0;
1571                 set_current_state(TASK_INTERRUPTIBLE);
1572                 snd_pcm_stream_lock_irq(substream);
1573                 state = runtime->status->state;
1574                 snd_pcm_stream_unlock_irq(substream);
1575                 if (state != SNDRV_PCM_STATE_RUNNING) {
1576                         set_current_state(TASK_RUNNING);
1577                         break;
1578                 }
1579                 res = schedule_timeout(10 * HZ);
1580                 if (signal_pending(current)) {
1581                         result = -ERESTARTSYS;
1582                         break;
1583                 }
1584                 if (res == 0) {
1585                         pcm_err(substream->pcm,
1586                                 "OSS sync error - DMA timeout\n");
1587                         result = -EIO;
1588                         break;
1589                 }
1590         }
1591         remove_wait_queue(&runtime->sleep, &wait);
1592         return result;
1593 }
1594
1595 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1596 {
1597         int err = 0;
1598         unsigned int saved_f_flags;
1599         struct snd_pcm_substream *substream;
1600         struct snd_pcm_runtime *runtime;
1601         snd_pcm_format_t format;
1602         unsigned long width;
1603         size_t size;
1604
1605         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1606         if (substream != NULL) {
1607                 runtime = substream->runtime;
1608                 if (atomic_read(&substream->mmap_count))
1609                         goto __direct;
1610                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1611                         return err;
1612                 format = snd_pcm_oss_format_from(runtime->oss.format);
1613                 width = snd_pcm_format_physical_width(format);
1614                 mutex_lock(&runtime->oss.params_lock);
1615                 if (runtime->oss.buffer_used > 0) {
1616 #ifdef OSS_DEBUG
1617                         pcm_dbg(substream->pcm, "sync: buffer_used\n");
1618 #endif
1619                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1620                         snd_pcm_format_set_silence(format,
1621                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1622                                                    size);
1623                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1624                         if (err < 0) {
1625                                 mutex_unlock(&runtime->oss.params_lock);
1626                                 return err;
1627                         }
1628                 } else if (runtime->oss.period_ptr > 0) {
1629 #ifdef OSS_DEBUG
1630                         pcm_dbg(substream->pcm, "sync: period_ptr\n");
1631 #endif
1632                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1633                         snd_pcm_format_set_silence(format,
1634                                                    runtime->oss.buffer,
1635                                                    size * 8 / width);
1636                         err = snd_pcm_oss_sync1(substream, size);
1637                         if (err < 0) {
1638                                 mutex_unlock(&runtime->oss.params_lock);
1639                                 return err;
1640                         }
1641                 }
1642                 /*
1643                  * The ALSA's period might be a bit large than OSS one.
1644                  * Fill the remain portion of ALSA period with zeros.
1645                  */
1646                 size = runtime->control->appl_ptr % runtime->period_size;
1647                 if (size > 0) {
1648                         size = runtime->period_size - size;
1649                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1650                                 size = (runtime->frame_bits * size) / 8;
1651                                 while (size > 0) {
1652                                         mm_segment_t fs;
1653                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1654                                         size -= size1;
1655                                         size1 *= 8;
1656                                         size1 /= runtime->sample_bits;
1657                                         snd_pcm_format_set_silence(runtime->format,
1658                                                                    runtime->oss.buffer,
1659                                                                    size1);
1660                                         size1 /= runtime->channels; /* frames */
1661                                         fs = snd_enter_user();
1662                                         snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1663                                         snd_leave_user(fs);
1664                                 }
1665                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1666                                 void __user *buffers[runtime->channels];
1667                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1668                                 snd_pcm_lib_writev(substream, buffers, size);
1669                         }
1670                 }
1671                 mutex_unlock(&runtime->oss.params_lock);
1672                 /*
1673                  * finish sync: drain the buffer
1674                  */
1675               __direct:
1676                 saved_f_flags = substream->f_flags;
1677                 substream->f_flags &= ~O_NONBLOCK;
1678                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1679                 substream->f_flags = saved_f_flags;
1680                 if (err < 0)
1681                         return err;
1682                 runtime->oss.prepare = 1;
1683         }
1684
1685         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1686         if (substream != NULL) {
1687                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1688                         return err;
1689                 runtime = substream->runtime;
1690                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1691                 if (err < 0)
1692                         return err;
1693                 runtime->oss.buffer_used = 0;
1694                 runtime->oss.prepare = 1;
1695         }
1696         return 0;
1697 }
1698
1699 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1700 {
1701         int idx;
1702
1703         for (idx = 1; idx >= 0; --idx) {
1704                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1705                 struct snd_pcm_runtime *runtime;
1706                 if (substream == NULL)
1707                         continue;
1708                 runtime = substream->runtime;
1709                 if (rate < 1000)
1710                         rate = 1000;
1711                 else if (rate > 192000)
1712                         rate = 192000;
1713                 if (runtime->oss.rate != rate) {
1714                         runtime->oss.params = 1;
1715                         runtime->oss.rate = rate;
1716                 }
1717         }
1718         return snd_pcm_oss_get_rate(pcm_oss_file);
1719 }
1720
1721 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1722 {
1723         struct snd_pcm_substream *substream;
1724         int err;
1725
1726         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1727                 return err;
1728         return substream->runtime->oss.rate;
1729 }
1730
1731 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1732 {
1733         int idx;
1734         if (channels < 1)
1735                 channels = 1;
1736         if (channels > 128)
1737                 return -EINVAL;
1738         for (idx = 1; idx >= 0; --idx) {
1739                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1740                 struct snd_pcm_runtime *runtime;
1741                 if (substream == NULL)
1742                         continue;
1743                 runtime = substream->runtime;
1744                 if (runtime->oss.channels != channels) {
1745                         runtime->oss.params = 1;
1746                         runtime->oss.channels = channels;
1747                 }
1748         }
1749         return snd_pcm_oss_get_channels(pcm_oss_file);
1750 }
1751
1752 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1753 {
1754         struct snd_pcm_substream *substream;
1755         int err;
1756
1757         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1758                 return err;
1759         return substream->runtime->oss.channels;
1760 }
1761
1762 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1763 {
1764         struct snd_pcm_substream *substream;
1765         int err;
1766
1767         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1768                 return err;
1769         return substream->runtime->oss.period_bytes;
1770 }
1771
1772 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1773 {
1774         struct snd_pcm_substream *substream;
1775         int err;
1776         int direct;
1777         struct snd_pcm_hw_params *params;
1778         unsigned int formats = 0;
1779         struct snd_mask format_mask;
1780         int fmt;
1781
1782         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1783                 return err;
1784         if (atomic_read(&substream->mmap_count))
1785                 direct = 1;
1786         else
1787                 direct = substream->oss.setup.direct;
1788         if (!direct)
1789                 return AFMT_MU_LAW | AFMT_U8 |
1790                        AFMT_S16_LE | AFMT_S16_BE |
1791                        AFMT_S8 | AFMT_U16_LE |
1792                        AFMT_U16_BE |
1793                         AFMT_S32_LE | AFMT_S32_BE |
1794                         AFMT_S24_LE | AFMT_S24_BE |
1795                         AFMT_S24_PACKED;
1796         params = kmalloc(sizeof(*params), GFP_KERNEL);
1797         if (!params)
1798                 return -ENOMEM;
1799         _snd_pcm_hw_params_any(params);
1800         err = snd_pcm_hw_refine(substream, params);
1801         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1802         kfree(params);
1803         if (err < 0)
1804                 return err;
1805         for (fmt = 0; fmt < 32; ++fmt) {
1806                 if (snd_mask_test(&format_mask, fmt)) {
1807                         int f = snd_pcm_oss_format_to(fmt);
1808                         if (f >= 0)
1809                                 formats |= f;
1810                 }
1811         }
1812         return formats;
1813 }
1814
1815 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1816 {
1817         int formats, idx;
1818
1819         if (format != AFMT_QUERY) {
1820                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1821                 if (formats < 0)
1822                         return formats;
1823                 if (!(formats & format))
1824                         format = AFMT_U8;
1825                 for (idx = 1; idx >= 0; --idx) {
1826                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1827                         struct snd_pcm_runtime *runtime;
1828                         if (substream == NULL)
1829                                 continue;
1830                         runtime = substream->runtime;
1831                         if (runtime->oss.format != format) {
1832                                 runtime->oss.params = 1;
1833                                 runtime->oss.format = format;
1834                         }
1835                 }
1836         }
1837         return snd_pcm_oss_get_format(pcm_oss_file);
1838 }
1839
1840 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1841 {
1842         struct snd_pcm_substream *substream;
1843         int err;
1844
1845         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1846                 return err;
1847         return substream->runtime->oss.format;
1848 }
1849
1850 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1851 {
1852         struct snd_pcm_runtime *runtime;
1853
1854         if (substream == NULL)
1855                 return 0;
1856         runtime = substream->runtime;
1857         if (subdivide == 0) {
1858                 subdivide = runtime->oss.subdivision;
1859                 if (subdivide == 0)
1860                         subdivide = 1;
1861                 return subdivide;
1862         }
1863         if (runtime->oss.subdivision || runtime->oss.fragshift)
1864                 return -EINVAL;
1865         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1866             subdivide != 8 && subdivide != 16)
1867                 return -EINVAL;
1868         runtime->oss.subdivision = subdivide;
1869         runtime->oss.params = 1;
1870         return subdivide;
1871 }
1872
1873 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1874 {
1875         int err = -EINVAL, idx;
1876
1877         for (idx = 1; idx >= 0; --idx) {
1878                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1879                 if (substream == NULL)
1880                         continue;
1881                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1882                         return err;
1883         }
1884         return err;
1885 }
1886
1887 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1888 {
1889         struct snd_pcm_runtime *runtime;
1890
1891         if (substream == NULL)
1892                 return 0;
1893         runtime = substream->runtime;
1894         if (runtime->oss.subdivision || runtime->oss.fragshift)
1895                 return -EINVAL;
1896         runtime->oss.fragshift = val & 0xffff;
1897         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1898         if (runtime->oss.fragshift < 4)         /* < 16 */
1899                 runtime->oss.fragshift = 4;
1900         if (runtime->oss.maxfrags < 2)
1901                 runtime->oss.maxfrags = 2;
1902         runtime->oss.params = 1;
1903         return 0;
1904 }
1905
1906 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1907 {
1908         int err = -EINVAL, idx;
1909
1910         for (idx = 1; idx >= 0; --idx) {
1911                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1912                 if (substream == NULL)
1913                         continue;
1914                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1915                         return err;
1916         }
1917         return err;
1918 }
1919
1920 static int snd_pcm_oss_nonblock(struct file * file)
1921 {
1922         spin_lock(&file->f_lock);
1923         file->f_flags |= O_NONBLOCK;
1924         spin_unlock(&file->f_lock);
1925         return 0;
1926 }
1927
1928 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1929 {
1930
1931         if (substream == NULL) {
1932                 res &= ~DSP_CAP_DUPLEX;
1933                 return res;
1934         }
1935 #ifdef DSP_CAP_MULTI
1936         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1937                 if (substream->pstr->substream_count > 1)
1938                         res |= DSP_CAP_MULTI;
1939 #endif
1940         /* DSP_CAP_REALTIME is set all times: */
1941         /* all ALSA drivers can return actual pointer in ring buffer */
1942 #if defined(DSP_CAP_REALTIME) && 0
1943         {
1944                 struct snd_pcm_runtime *runtime = substream->runtime;
1945                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1946                         res &= ~DSP_CAP_REALTIME;
1947         }
1948 #endif
1949         return res;
1950 }
1951
1952 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1953 {
1954         int result, idx;
1955
1956         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1957         for (idx = 0; idx < 2; idx++) {
1958                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1959                 result = snd_pcm_oss_get_caps1(substream, result);
1960         }
1961         result |= 0x0001;       /* revision - same as SB AWE 64 */
1962         return result;
1963 }
1964
1965 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1966                                       snd_pcm_uframes_t hw_ptr)
1967 {
1968         struct snd_pcm_runtime *runtime = substream->runtime;
1969         snd_pcm_uframes_t appl_ptr;
1970         appl_ptr = hw_ptr + runtime->buffer_size;
1971         appl_ptr %= runtime->boundary;
1972         runtime->control->appl_ptr = appl_ptr;
1973 }
1974
1975 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1976 {
1977         struct snd_pcm_runtime *runtime;
1978         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1979         int err, cmd;
1980
1981 #ifdef OSS_DEBUG
1982         pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1983 #endif
1984
1985         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1986         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1987
1988         if (psubstream) {
1989                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1990                         return err;
1991         }
1992         if (csubstream) {
1993                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1994                         return err;
1995         }
1996         if (psubstream) {
1997                 runtime = psubstream->runtime;
1998                 if (trigger & PCM_ENABLE_OUTPUT) {
1999                         if (runtime->oss.trigger)
2000                                 goto _skip1;
2001                         if (atomic_read(&psubstream->mmap_count))
2002                                 snd_pcm_oss_simulate_fill(psubstream,
2003                                                 get_hw_ptr_period(runtime));
2004                         runtime->oss.trigger = 1;
2005                         runtime->start_threshold = 1;
2006                         cmd = SNDRV_PCM_IOCTL_START;
2007                 } else {
2008                         if (!runtime->oss.trigger)
2009                                 goto _skip1;
2010                         runtime->oss.trigger = 0;
2011                         runtime->start_threshold = runtime->boundary;
2012                         cmd = SNDRV_PCM_IOCTL_DROP;
2013                         runtime->oss.prepare = 1;
2014                 }
2015                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2016                 if (err < 0)
2017                         return err;
2018         }
2019  _skip1:
2020         if (csubstream) {
2021                 runtime = csubstream->runtime;
2022                 if (trigger & PCM_ENABLE_INPUT) {
2023                         if (runtime->oss.trigger)
2024                                 goto _skip2;
2025                         runtime->oss.trigger = 1;
2026                         runtime->start_threshold = 1;
2027                         cmd = SNDRV_PCM_IOCTL_START;
2028                 } else {
2029                         if (!runtime->oss.trigger)
2030                                 goto _skip2;
2031                         runtime->oss.trigger = 0;
2032                         runtime->start_threshold = runtime->boundary;
2033                         cmd = SNDRV_PCM_IOCTL_DROP;
2034                         runtime->oss.prepare = 1;
2035                 }
2036                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2037                 if (err < 0)
2038                         return err;
2039         }
2040  _skip2:
2041         return 0;
2042 }
2043
2044 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2045 {
2046         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2047         int result = 0;
2048
2049         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2050         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2051         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2052                 result |= PCM_ENABLE_OUTPUT;
2053         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2054                 result |= PCM_ENABLE_INPUT;
2055         return result;
2056 }
2057
2058 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2059 {
2060         struct snd_pcm_substream *substream;
2061         struct snd_pcm_runtime *runtime;
2062         snd_pcm_sframes_t delay;
2063         int err;
2064
2065         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2066         if (substream == NULL)
2067                 return -EINVAL;
2068         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2069                 return err;
2070         runtime = substream->runtime;
2071         if (runtime->oss.params || runtime->oss.prepare)
2072                 return 0;
2073         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2074         if (err == -EPIPE)
2075                 delay = 0;      /* hack for broken OSS applications */
2076         else if (err < 0)
2077                 return err;
2078         return snd_pcm_oss_bytes(substream, delay);
2079 }
2080
2081 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2082 {
2083         struct snd_pcm_substream *substream;
2084         struct snd_pcm_runtime *runtime;
2085         snd_pcm_sframes_t delay;
2086         int fixup;
2087         struct count_info info;
2088         int err;
2089
2090         if (_info == NULL)
2091                 return -EFAULT;
2092         substream = pcm_oss_file->streams[stream];
2093         if (substream == NULL)
2094                 return -EINVAL;
2095         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2096                 return err;
2097         runtime = substream->runtime;
2098         if (runtime->oss.params || runtime->oss.prepare) {
2099                 memset(&info, 0, sizeof(info));
2100                 if (copy_to_user(_info, &info, sizeof(info)))
2101                         return -EFAULT;
2102                 return 0;
2103         }
2104         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2105                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2106                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2107                         err = 0;
2108                         delay = 0;
2109                         fixup = 0;
2110                 } else {
2111                         fixup = runtime->oss.buffer_used;
2112                 }
2113         } else {
2114                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2115                 fixup = -runtime->oss.buffer_used;
2116         }
2117         if (err < 0)
2118                 return err;
2119         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2120         if (atomic_read(&substream->mmap_count)) {
2121                 snd_pcm_sframes_t n;
2122                 delay = get_hw_ptr_period(runtime);
2123                 n = delay - runtime->oss.prev_hw_ptr_period;
2124                 if (n < 0)
2125                         n += runtime->boundary;
2126                 info.blocks = n / runtime->period_size;
2127                 runtime->oss.prev_hw_ptr_period = delay;
2128                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2129                         snd_pcm_oss_simulate_fill(substream, delay);
2130                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2131         } else {
2132                 delay = snd_pcm_oss_bytes(substream, delay);
2133                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2134                         if (substream->oss.setup.buggyptr)
2135                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2136                         else
2137                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2138                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2139                 } else {
2140                         delay += fixup;
2141                         info.blocks = delay / runtime->oss.period_bytes;
2142                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2143                 }
2144         }
2145         if (copy_to_user(_info, &info, sizeof(info)))
2146                 return -EFAULT;
2147         return 0;
2148 }
2149
2150 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2151 {
2152         struct snd_pcm_substream *substream;
2153         struct snd_pcm_runtime *runtime;
2154         snd_pcm_sframes_t avail;
2155         int fixup;
2156         struct audio_buf_info info;
2157         int err;
2158
2159         if (_info == NULL)
2160                 return -EFAULT;
2161         substream = pcm_oss_file->streams[stream];
2162         if (substream == NULL)
2163                 return -EINVAL;
2164         runtime = substream->runtime;
2165
2166         if (runtime->oss.params &&
2167             (err = snd_pcm_oss_change_params(substream)) < 0)
2168                 return err;
2169
2170         info.fragsize = runtime->oss.period_bytes;
2171         info.fragstotal = runtime->periods;
2172         if (runtime->oss.prepare) {
2173                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2174                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2175                         info.fragments = runtime->oss.periods;
2176                 } else {
2177                         info.bytes = 0;
2178                         info.fragments = 0;
2179                 }
2180         } else {
2181                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2182                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2183                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2184                                 avail = runtime->buffer_size;
2185                                 err = 0;
2186                                 fixup = 0;
2187                         } else {
2188                                 avail = runtime->buffer_size - avail;
2189                                 fixup = -runtime->oss.buffer_used;
2190                         }
2191                 } else {
2192                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2193                         fixup = runtime->oss.buffer_used;
2194                 }
2195                 if (err < 0)
2196                         return err;
2197                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2198                 info.fragments = info.bytes / runtime->oss.period_bytes;
2199         }
2200
2201 #ifdef OSS_DEBUG
2202         pcm_dbg(substream->pcm,
2203                 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2204                 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2205 #endif
2206         if (copy_to_user(_info, &info, sizeof(info)))
2207                 return -EFAULT;
2208         return 0;
2209 }
2210
2211 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2212 {
2213         // it won't be probably implemented
2214         // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2215         return -EINVAL;
2216 }
2217
2218 static const char *strip_task_path(const char *path)
2219 {
2220         const char *ptr, *ptrl = NULL;
2221         for (ptr = path; *ptr; ptr++) {
2222                 if (*ptr == '/')
2223                         ptrl = ptr + 1;
2224         }
2225         return ptrl;
2226 }
2227
2228 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2229                                       const char *task_name,
2230                                       struct snd_pcm_oss_setup *rsetup)
2231 {
2232         struct snd_pcm_oss_setup *setup;
2233
2234         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2235         do {
2236                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2237                      setup = setup->next) {
2238                         if (!strcmp(setup->task_name, task_name))
2239                                 goto out;
2240                 }
2241         } while ((task_name = strip_task_path(task_name)) != NULL);
2242  out:
2243         if (setup)
2244                 *rsetup = *setup;
2245         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2246 }
2247
2248 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2249 {
2250         struct snd_pcm_runtime *runtime;
2251         runtime = substream->runtime;
2252         vfree(runtime->oss.buffer);
2253         runtime->oss.buffer = NULL;
2254 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2255         snd_pcm_oss_plugin_clear(substream);
2256 #endif
2257         substream->oss.oss = 0;
2258 }
2259
2260 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2261                                        struct snd_pcm_oss_setup *setup,
2262                                        int minor)
2263 {
2264         struct snd_pcm_runtime *runtime;
2265
2266         substream->oss.oss = 1;
2267         substream->oss.setup = *setup;
2268         if (setup->nonblock)
2269                 substream->f_flags |= O_NONBLOCK;
2270         else if (setup->block)
2271                 substream->f_flags &= ~O_NONBLOCK;
2272         runtime = substream->runtime;
2273         runtime->oss.params = 1;
2274         runtime->oss.trigger = 1;
2275         runtime->oss.rate = 8000;
2276         mutex_init(&runtime->oss.params_lock);
2277         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2278         case SNDRV_MINOR_OSS_PCM_8:
2279                 runtime->oss.format = AFMT_U8;
2280                 break;
2281         case SNDRV_MINOR_OSS_PCM_16:
2282                 runtime->oss.format = AFMT_S16_LE;
2283                 break;
2284         default:
2285                 runtime->oss.format = AFMT_MU_LAW;
2286         }
2287         runtime->oss.channels = 1;
2288         runtime->oss.fragshift = 0;
2289         runtime->oss.maxfrags = 0;
2290         runtime->oss.subdivision = 0;
2291         substream->pcm_release = snd_pcm_oss_release_substream;
2292 }
2293
2294 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2295 {
2296         int cidx;
2297         if (!pcm_oss_file)
2298                 return 0;
2299         for (cidx = 0; cidx < 2; ++cidx) {
2300                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2301                 if (substream)
2302                         snd_pcm_release_substream(substream);
2303         }
2304         kfree(pcm_oss_file);
2305         return 0;
2306 }
2307
2308 static int snd_pcm_oss_open_file(struct file *file,
2309                                  struct snd_pcm *pcm,
2310                                  struct snd_pcm_oss_file **rpcm_oss_file,
2311                                  int minor,
2312                                  struct snd_pcm_oss_setup *setup)
2313 {
2314         int idx, err;
2315         struct snd_pcm_oss_file *pcm_oss_file;
2316         struct snd_pcm_substream *substream;
2317         fmode_t f_mode = file->f_mode;
2318
2319         if (rpcm_oss_file)
2320                 *rpcm_oss_file = NULL;
2321
2322         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2323         if (pcm_oss_file == NULL)
2324                 return -ENOMEM;
2325
2326         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2327             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2328                 f_mode = FMODE_WRITE;
2329
2330         file->f_flags &= ~O_APPEND;
2331         for (idx = 0; idx < 2; idx++) {
2332                 if (setup[idx].disable)
2333                         continue;
2334                 if (! pcm->streams[idx].substream_count)
2335                         continue; /* no matching substream */
2336                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2337                         if (! (f_mode & FMODE_WRITE))
2338                                 continue;
2339                 } else {
2340                         if (! (f_mode & FMODE_READ))
2341                                 continue;
2342                 }
2343                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2344                 if (err < 0) {
2345                         snd_pcm_oss_release_file(pcm_oss_file);
2346                         return err;
2347                 }
2348
2349                 pcm_oss_file->streams[idx] = substream;
2350                 substream->file = pcm_oss_file;
2351                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2352         }
2353
2354         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2355                 snd_pcm_oss_release_file(pcm_oss_file);
2356                 return -EINVAL;
2357         }
2358
2359         file->private_data = pcm_oss_file;
2360         if (rpcm_oss_file)
2361                 *rpcm_oss_file = pcm_oss_file;
2362         return 0;
2363 }
2364
2365
2366 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2367 {
2368         unsigned int idx;
2369
2370         if (snd_BUG_ON(!task || !name || size < 2))
2371                 return -EINVAL;
2372         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2373                 name[idx] = task->comm[idx];
2374         name[idx] = '\0';
2375         return 0;
2376 }
2377
2378 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2379 {
2380         int err;
2381         char task_name[32];
2382         struct snd_pcm *pcm;
2383         struct snd_pcm_oss_file *pcm_oss_file;
2384         struct snd_pcm_oss_setup setup[2];
2385         int nonblock;
2386         wait_queue_t wait;
2387
2388         err = nonseekable_open(inode, file);
2389         if (err < 0)
2390                 return err;
2391
2392         pcm = snd_lookup_oss_minor_data(iminor(inode),
2393                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2394         if (pcm == NULL) {
2395                 err = -ENODEV;
2396                 goto __error1;
2397         }
2398         err = snd_card_file_add(pcm->card, file);
2399         if (err < 0)
2400                 goto __error1;
2401         if (!try_module_get(pcm->card->module)) {
2402                 err = -EFAULT;
2403                 goto __error2;
2404         }
2405         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2406                 err = -EFAULT;
2407                 goto __error;
2408         }
2409         memset(setup, 0, sizeof(setup));
2410         if (file->f_mode & FMODE_WRITE)
2411                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2412                                            task_name, &setup[0]);
2413         if (file->f_mode & FMODE_READ)
2414                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2415                                            task_name, &setup[1]);
2416
2417         nonblock = !!(file->f_flags & O_NONBLOCK);
2418         if (!nonblock)
2419                 nonblock = nonblock_open;
2420
2421         init_waitqueue_entry(&wait, current);
2422         add_wait_queue(&pcm->open_wait, &wait);
2423         mutex_lock(&pcm->open_mutex);
2424         while (1) {
2425                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2426                                             iminor(inode), setup);
2427                 if (err >= 0)
2428                         break;
2429                 if (err == -EAGAIN) {
2430                         if (nonblock) {
2431                                 err = -EBUSY;
2432                                 break;
2433                         }
2434                 } else
2435                         break;
2436                 set_current_state(TASK_INTERRUPTIBLE);
2437                 mutex_unlock(&pcm->open_mutex);
2438                 schedule();
2439                 mutex_lock(&pcm->open_mutex);
2440                 if (pcm->card->shutdown) {
2441                         err = -ENODEV;
2442                         break;
2443                 }
2444                 if (signal_pending(current)) {
2445                         err = -ERESTARTSYS;
2446                         break;
2447                 }
2448         }
2449         remove_wait_queue(&pcm->open_wait, &wait);
2450         mutex_unlock(&pcm->open_mutex);
2451         if (err < 0)
2452                 goto __error;
2453         snd_card_unref(pcm->card);
2454         return err;
2455
2456       __error:
2457         module_put(pcm->card->module);
2458       __error2:
2459         snd_card_file_remove(pcm->card, file);
2460       __error1:
2461         if (pcm)
2462                 snd_card_unref(pcm->card);
2463         return err;
2464 }
2465
2466 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2467 {
2468         struct snd_pcm *pcm;
2469         struct snd_pcm_substream *substream;
2470         struct snd_pcm_oss_file *pcm_oss_file;
2471
2472         pcm_oss_file = file->private_data;
2473         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2474         if (substream == NULL)
2475                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2476         if (snd_BUG_ON(!substream))
2477                 return -ENXIO;
2478         pcm = substream->pcm;
2479         if (!pcm->card->shutdown)
2480                 snd_pcm_oss_sync(pcm_oss_file);
2481         mutex_lock(&pcm->open_mutex);
2482         snd_pcm_oss_release_file(pcm_oss_file);
2483         mutex_unlock(&pcm->open_mutex);
2484         wake_up(&pcm->open_wait);
2485         module_put(pcm->card->module);
2486         snd_card_file_remove(pcm->card, file);
2487         return 0;
2488 }
2489
2490 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2491 {
2492         struct snd_pcm_oss_file *pcm_oss_file;
2493         int __user *p = (int __user *)arg;
2494         int res;
2495
2496         pcm_oss_file = file->private_data;
2497         if (cmd == OSS_GETVERSION)
2498                 return put_user(SNDRV_OSS_VERSION, p);
2499         if (cmd == OSS_ALSAEMULVER)
2500                 return put_user(1, p);
2501 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2502         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2503                 struct snd_pcm_substream *substream;
2504                 int idx;
2505                 for (idx = 0; idx < 2; ++idx) {
2506                         substream = pcm_oss_file->streams[idx];
2507                         if (substream != NULL)
2508                                 break;
2509                 }
2510                 if (snd_BUG_ON(idx >= 2))
2511                         return -ENXIO;
2512                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2513         }
2514 #endif
2515         if (((cmd >> 8) & 0xff) != 'P')
2516                 return -EINVAL;
2517 #ifdef OSS_DEBUG
2518         pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2519 #endif
2520         switch (cmd) {
2521         case SNDCTL_DSP_RESET:
2522                 return snd_pcm_oss_reset(pcm_oss_file);
2523         case SNDCTL_DSP_SYNC:
2524                 return snd_pcm_oss_sync(pcm_oss_file);
2525         case SNDCTL_DSP_SPEED:
2526                 if (get_user(res, p))
2527                         return -EFAULT;
2528                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2529                         return res;
2530                 return put_user(res, p);
2531         case SOUND_PCM_READ_RATE:
2532                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2533                 if (res < 0)
2534                         return res;
2535                 return put_user(res, p);
2536         case SNDCTL_DSP_STEREO:
2537                 if (get_user(res, p))
2538                         return -EFAULT;
2539                 res = res > 0 ? 2 : 1;
2540                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2541                         return res;
2542                 return put_user(--res, p);
2543         case SNDCTL_DSP_GETBLKSIZE:
2544                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2545                 if (res < 0)
2546                         return res;
2547                 return put_user(res, p);
2548         case SNDCTL_DSP_SETFMT:
2549                 if (get_user(res, p))
2550                         return -EFAULT;
2551                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2552                 if (res < 0)
2553                         return res;
2554                 return put_user(res, p);
2555         case SOUND_PCM_READ_BITS:
2556                 res = snd_pcm_oss_get_format(pcm_oss_file);
2557                 if (res < 0)
2558                         return res;
2559                 return put_user(res, p);
2560         case SNDCTL_DSP_CHANNELS:
2561                 if (get_user(res, p))
2562                         return -EFAULT;
2563                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2564                 if (res < 0)
2565                         return res;
2566                 return put_user(res, p);
2567         case SOUND_PCM_READ_CHANNELS:
2568                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2569                 if (res < 0)
2570                         return res;
2571                 return put_user(res, p);
2572         case SOUND_PCM_WRITE_FILTER:
2573         case SOUND_PCM_READ_FILTER:
2574                 return -EIO;
2575         case SNDCTL_DSP_POST:
2576                 return snd_pcm_oss_post(pcm_oss_file);
2577         case SNDCTL_DSP_SUBDIVIDE:
2578                 if (get_user(res, p))
2579                         return -EFAULT;
2580                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2581                 if (res < 0)
2582                         return res;
2583                 return put_user(res, p);
2584         case SNDCTL_DSP_SETFRAGMENT:
2585                 if (get_user(res, p))
2586                         return -EFAULT;
2587                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2588         case SNDCTL_DSP_GETFMTS:
2589                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2590                 if (res < 0)
2591                         return res;
2592                 return put_user(res, p);
2593         case SNDCTL_DSP_GETOSPACE:
2594         case SNDCTL_DSP_GETISPACE:
2595                 return snd_pcm_oss_get_space(pcm_oss_file,
2596                         cmd == SNDCTL_DSP_GETISPACE ?
2597                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2598                         (struct audio_buf_info __user *) arg);
2599         case SNDCTL_DSP_NONBLOCK:
2600                 return snd_pcm_oss_nonblock(file);
2601         case SNDCTL_DSP_GETCAPS:
2602                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2603                 if (res < 0)
2604                         return res;
2605                 return put_user(res, p);
2606         case SNDCTL_DSP_GETTRIGGER:
2607                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2608                 if (res < 0)
2609                         return res;
2610                 return put_user(res, p);
2611         case SNDCTL_DSP_SETTRIGGER:
2612                 if (get_user(res, p))
2613                         return -EFAULT;
2614                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2615         case SNDCTL_DSP_GETIPTR:
2616         case SNDCTL_DSP_GETOPTR:
2617                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2618                         cmd == SNDCTL_DSP_GETIPTR ?
2619                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2620                         (struct count_info __user *) arg);
2621         case SNDCTL_DSP_MAPINBUF:
2622         case SNDCTL_DSP_MAPOUTBUF:
2623                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2624                         cmd == SNDCTL_DSP_MAPINBUF ?
2625                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2626                         (struct buffmem_desc __user *) arg);
2627         case SNDCTL_DSP_SETSYNCRO:
2628                 /* stop DMA now.. */
2629                 return 0;
2630         case SNDCTL_DSP_SETDUPLEX:
2631                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2632                         return 0;
2633                 return -EIO;
2634         case SNDCTL_DSP_GETODELAY:
2635                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2636                 if (res < 0) {
2637                         /* it's for sure, some broken apps don't check for error codes */
2638                         put_user(0, p);
2639                         return res;
2640                 }
2641                 return put_user(res, p);
2642         case SNDCTL_DSP_PROFILE:
2643                 return 0;       /* silently ignore */
2644         default:
2645                 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2646         }
2647         return -EINVAL;
2648 }
2649
2650 #ifdef CONFIG_COMPAT
2651 /* all compatible */
2652 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2653 #else
2654 #define snd_pcm_oss_ioctl_compat        NULL
2655 #endif
2656
2657 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2658 {
2659         struct snd_pcm_oss_file *pcm_oss_file;
2660         struct snd_pcm_substream *substream;
2661
2662         pcm_oss_file = file->private_data;
2663         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2664         if (substream == NULL)
2665                 return -ENXIO;
2666         substream->f_flags = file->f_flags & O_NONBLOCK;
2667 #ifndef OSS_DEBUG
2668         return snd_pcm_oss_read1(substream, buf, count);
2669 #else
2670         {
2671                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2672                 pcm_dbg(substream->pcm,
2673                         "pcm_oss: read %li bytes (returned %li bytes)\n",
2674                         (long)count, (long)res);
2675                 return res;
2676         }
2677 #endif
2678 }
2679
2680 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2681 {
2682         struct snd_pcm_oss_file *pcm_oss_file;
2683         struct snd_pcm_substream *substream;
2684         long result;
2685
2686         pcm_oss_file = file->private_data;
2687         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2688         if (substream == NULL)
2689                 return -ENXIO;
2690         substream->f_flags = file->f_flags & O_NONBLOCK;
2691         result = snd_pcm_oss_write1(substream, buf, count);
2692 #ifdef OSS_DEBUG
2693         pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2694                (long)count, (long)result);
2695 #endif
2696         return result;
2697 }
2698
2699 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2700 {
2701         struct snd_pcm_runtime *runtime = substream->runtime;
2702         if (atomic_read(&substream->mmap_count))
2703                 return runtime->oss.prev_hw_ptr_period !=
2704                                                 get_hw_ptr_period(runtime);
2705         else
2706                 return snd_pcm_playback_avail(runtime) >=
2707                                                 runtime->oss.period_frames;
2708 }
2709
2710 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2711 {
2712         struct snd_pcm_runtime *runtime = substream->runtime;
2713         if (atomic_read(&substream->mmap_count))
2714                 return runtime->oss.prev_hw_ptr_period !=
2715                                                 get_hw_ptr_period(runtime);
2716         else
2717                 return snd_pcm_capture_avail(runtime) >=
2718                                                 runtime->oss.period_frames;
2719 }
2720
2721 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2722 {
2723         struct snd_pcm_oss_file *pcm_oss_file;
2724         unsigned int mask;
2725         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2726
2727         pcm_oss_file = file->private_data;
2728
2729         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2730         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2731
2732         mask = 0;
2733         if (psubstream != NULL) {
2734                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2735                 poll_wait(file, &runtime->sleep, wait);
2736                 snd_pcm_stream_lock_irq(psubstream);
2737                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2738                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2739                      snd_pcm_oss_playback_ready(psubstream)))
2740                         mask |= POLLOUT | POLLWRNORM;
2741                 snd_pcm_stream_unlock_irq(psubstream);
2742         }
2743         if (csubstream != NULL) {
2744                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2745                 snd_pcm_state_t ostate;
2746                 poll_wait(file, &runtime->sleep, wait);
2747                 snd_pcm_stream_lock_irq(csubstream);
2748                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2749                     snd_pcm_oss_capture_ready(csubstream))
2750                         mask |= POLLIN | POLLRDNORM;
2751                 snd_pcm_stream_unlock_irq(csubstream);
2752                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2753                         struct snd_pcm_oss_file ofile;
2754                         memset(&ofile, 0, sizeof(ofile));
2755                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2756                         runtime->oss.trigger = 0;
2757                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2758                 }
2759         }
2760
2761         return mask;
2762 }
2763
2764 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2765 {
2766         struct snd_pcm_oss_file *pcm_oss_file;
2767         struct snd_pcm_substream *substream = NULL;
2768         struct snd_pcm_runtime *runtime;
2769         int err;
2770
2771 #ifdef OSS_DEBUG
2772         pr_debug("pcm_oss: mmap begin\n");
2773 #endif
2774         pcm_oss_file = file->private_data;
2775         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2776         case VM_READ | VM_WRITE:
2777                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2778                 if (substream)
2779                         break;
2780                 /* Fall through */
2781         case VM_READ:
2782                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2783                 break;
2784         case VM_WRITE:
2785                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2786                 break;
2787         default:
2788                 return -EINVAL;
2789         }
2790         /* set VM_READ access as well to fix memset() routines that do
2791            reads before writes (to improve performance) */
2792         area->vm_flags |= VM_READ;
2793         if (substream == NULL)
2794                 return -ENXIO;
2795         runtime = substream->runtime;
2796         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2797                 return -EIO;
2798         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2799                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2800         else
2801                 return -EIO;
2802
2803         if (runtime->oss.params) {
2804                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2805                         return err;
2806         }
2807 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2808         if (runtime->oss.plugin_first != NULL)
2809                 return -EIO;
2810 #endif
2811
2812         if (area->vm_pgoff != 0)
2813                 return -EINVAL;
2814
2815         err = snd_pcm_mmap_data(substream, file, area);
2816         if (err < 0)
2817                 return err;
2818         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2819         runtime->silence_threshold = 0;
2820         runtime->silence_size = 0;
2821 #ifdef OSS_DEBUG
2822         pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2823                runtime->oss.mmap_bytes);
2824 #endif
2825         /* In mmap mode we never stop */
2826         runtime->stop_threshold = runtime->boundary;
2827
2828         return 0;
2829 }
2830
2831 #ifdef CONFIG_SND_VERBOSE_PROCFS
2832 /*
2833  *  /proc interface
2834  */
2835
2836 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2837                                   struct snd_info_buffer *buffer)
2838 {
2839         struct snd_pcm_str *pstr = entry->private_data;
2840         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2841         mutex_lock(&pstr->oss.setup_mutex);
2842         while (setup) {
2843                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2844                             setup->task_name,
2845                             setup->periods,
2846                             setup->period_size,
2847                             setup->disable ? " disable" : "",
2848                             setup->direct ? " direct" : "",
2849                             setup->block ? " block" : "",
2850                             setup->nonblock ? " non-block" : "",
2851                             setup->partialfrag ? " partial-frag" : "",
2852                             setup->nosilence ? " no-silence" : "");
2853                 setup = setup->next;
2854         }
2855         mutex_unlock(&pstr->oss.setup_mutex);
2856 }
2857
2858 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2859 {
2860         struct snd_pcm_oss_setup *setup, *setupn;
2861
2862         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2863              setup; setup = setupn) {
2864                 setupn = setup->next;
2865                 kfree(setup->task_name);
2866                 kfree(setup);
2867         }
2868         pstr->oss.setup_list = NULL;
2869 }
2870
2871 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2872                                    struct snd_info_buffer *buffer)
2873 {
2874         struct snd_pcm_str *pstr = entry->private_data;
2875         char line[128], str[32], task_name[32];
2876         const char *ptr;
2877         int idx1;
2878         struct snd_pcm_oss_setup *setup, *setup1, template;
2879
2880         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2881                 mutex_lock(&pstr->oss.setup_mutex);
2882                 memset(&template, 0, sizeof(template));
2883                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2884                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2885                         snd_pcm_oss_proc_free_setup_list(pstr);
2886                         mutex_unlock(&pstr->oss.setup_mutex);
2887                         continue;
2888                 }
2889                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2890                         if (!strcmp(setup->task_name, task_name)) {
2891                                 template = *setup;
2892                                 break;
2893                         }
2894                 }
2895                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2896                 template.periods = simple_strtoul(str, NULL, 10);
2897                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2898                 template.period_size = simple_strtoul(str, NULL, 10);
2899                 for (idx1 = 31; idx1 >= 0; idx1--)
2900                         if (template.period_size & (1 << idx1))
2901                                 break;
2902                 for (idx1--; idx1 >= 0; idx1--)
2903                         template.period_size &= ~(1 << idx1);
2904                 do {
2905                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2906                         if (!strcmp(str, "disable")) {
2907                                 template.disable = 1;
2908                         } else if (!strcmp(str, "direct")) {
2909                                 template.direct = 1;
2910                         } else if (!strcmp(str, "block")) {
2911                                 template.block = 1;
2912                         } else if (!strcmp(str, "non-block")) {
2913                                 template.nonblock = 1;
2914                         } else if (!strcmp(str, "partial-frag")) {
2915                                 template.partialfrag = 1;
2916                         } else if (!strcmp(str, "no-silence")) {
2917                                 template.nosilence = 1;
2918                         } else if (!strcmp(str, "buggy-ptr")) {
2919                                 template.buggyptr = 1;
2920                         }
2921                 } while (*str);
2922                 if (setup == NULL) {
2923                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2924                         if (! setup) {
2925                                 buffer->error = -ENOMEM;
2926                                 mutex_unlock(&pstr->oss.setup_mutex);
2927                                 return;
2928                         }
2929                         if (pstr->oss.setup_list == NULL)
2930                                 pstr->oss.setup_list = setup;
2931                         else {
2932                                 for (setup1 = pstr->oss.setup_list;
2933                                      setup1->next; setup1 = setup1->next);
2934                                 setup1->next = setup;
2935                         }
2936                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2937                         if (! template.task_name) {
2938                                 kfree(setup);
2939                                 buffer->error = -ENOMEM;
2940                                 mutex_unlock(&pstr->oss.setup_mutex);
2941                                 return;
2942                         }
2943                 }
2944                 *setup = template;
2945                 mutex_unlock(&pstr->oss.setup_mutex);
2946         }
2947 }
2948
2949 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2950 {
2951         int stream;
2952         for (stream = 0; stream < 2; ++stream) {
2953                 struct snd_info_entry *entry;
2954                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2955                 if (pstr->substream_count == 0)
2956                         continue;
2957                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2958                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2959                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2960                         entry->c.text.read = snd_pcm_oss_proc_read;
2961                         entry->c.text.write = snd_pcm_oss_proc_write;
2962                         entry->private_data = pstr;
2963                         if (snd_info_register(entry) < 0) {
2964                                 snd_info_free_entry(entry);
2965                                 entry = NULL;
2966                         }
2967                 }
2968                 pstr->oss.proc_entry = entry;
2969         }
2970 }
2971
2972 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2973 {
2974         int stream;
2975         for (stream = 0; stream < 2; ++stream) {
2976                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2977                 snd_info_free_entry(pstr->oss.proc_entry);
2978                 pstr->oss.proc_entry = NULL;
2979                 snd_pcm_oss_proc_free_setup_list(pstr);
2980         }
2981 }
2982 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2983 #define snd_pcm_oss_proc_init(pcm)
2984 #define snd_pcm_oss_proc_done(pcm)
2985 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2986
2987 /*
2988  *  ENTRY functions
2989  */
2990
2991 static const struct file_operations snd_pcm_oss_f_reg =
2992 {
2993         .owner =        THIS_MODULE,
2994         .read =         snd_pcm_oss_read,
2995         .write =        snd_pcm_oss_write,
2996         .open =         snd_pcm_oss_open,
2997         .release =      snd_pcm_oss_release,
2998         .llseek =       no_llseek,
2999         .poll =         snd_pcm_oss_poll,
3000         .unlocked_ioctl =       snd_pcm_oss_ioctl,
3001         .compat_ioctl = snd_pcm_oss_ioctl_compat,
3002         .mmap =         snd_pcm_oss_mmap,
3003 };
3004
3005 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3006 {
3007         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3008                                     pcm->card, index, &snd_pcm_oss_f_reg,
3009                                     pcm) < 0) {
3010                 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3011                            pcm->card->number, pcm->device);
3012         }
3013 }
3014
3015 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3016 {
3017         pcm->oss.reg = 0;
3018         if (dsp_map[pcm->card->number] == (int)pcm->device) {
3019                 char name[128];
3020                 int duplex;
3021                 register_oss_dsp(pcm, 0);
3022                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3023                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3024                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3025                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3026 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3027                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3028                                       pcm->card->number,
3029                                       name);
3030 #endif
3031                 pcm->oss.reg++;
3032                 pcm->oss.reg_mask |= 1;
3033         }
3034         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3035                 register_oss_dsp(pcm, 1);
3036                 pcm->oss.reg++;
3037                 pcm->oss.reg_mask |= 2;
3038         }
3039
3040         if (pcm->oss.reg)
3041                 snd_pcm_oss_proc_init(pcm);
3042
3043         return 0;
3044 }
3045
3046 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3047 {
3048         if (pcm->oss.reg) {
3049                 if (pcm->oss.reg_mask & 1) {
3050                         pcm->oss.reg_mask &= ~1;
3051                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3052                                                   pcm->card, 0);
3053                 }
3054                 if (pcm->oss.reg_mask & 2) {
3055                         pcm->oss.reg_mask &= ~2;
3056                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3057                                                   pcm->card, 1);
3058                 }
3059                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3060 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3061                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3062 #endif
3063                 }
3064                 pcm->oss.reg = 0;
3065         }
3066         return 0;
3067 }
3068
3069 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3070 {
3071         snd_pcm_oss_disconnect_minor(pcm);
3072         snd_pcm_oss_proc_done(pcm);
3073         return 0;
3074 }
3075
3076 static struct snd_pcm_notify snd_pcm_oss_notify =
3077 {
3078         .n_register =   snd_pcm_oss_register_minor,
3079         .n_disconnect = snd_pcm_oss_disconnect_minor,
3080         .n_unregister = snd_pcm_oss_unregister_minor,
3081 };
3082
3083 static int __init alsa_pcm_oss_init(void)
3084 {
3085         int i;
3086         int err;
3087
3088         /* check device map table */
3089         for (i = 0; i < SNDRV_CARDS; i++) {
3090                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3091                         pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3092                                    i, dsp_map[i]);
3093                         dsp_map[i] = 0;
3094                 }
3095                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3096                         pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3097                                    i, adsp_map[i]);
3098                         adsp_map[i] = 1;
3099                 }
3100         }
3101         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3102                 return err;
3103         return 0;
3104 }
3105
3106 static void __exit alsa_pcm_oss_exit(void)
3107 {
3108         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3109 }
3110
3111 module_init(alsa_pcm_oss_init)
3112 module_exit(alsa_pcm_oss_exit)