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 int 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                 snd_printd("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                 snd_printd("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                         snd_printd("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                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 946                         snd_pcm_oss_plugin_clear(substream);
 947                         goto failure;
 948                 }
 949                 if (runtime->oss.plugin_first) {
 950                         struct snd_pcm_plugin *plugin;
 951                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 952                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 953                                 snd_pcm_oss_plugin_clear(substream);
 954                                 goto failure;
 955                         }
 956                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 957                                 err = snd_pcm_plugin_append(plugin);
 958                         } else {
 959                                 err = snd_pcm_plugin_insert(plugin);
 960                         }
 961                         if (err < 0) {
 962                                 snd_pcm_oss_plugin_clear(substream);
 963                                 goto failure;
 964                         }
 965                 }
 966         }
 967 #endif
 968
 969         err = snd_pcm_oss_period_size(substream, params, sparams);
 970         if (err < 0)
 971                 goto failure;
 972
 973         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 974         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 975         if (err < 0)
 976                 goto failure;
 977
 978         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 979                                      runtime->oss.periods, NULL);
 980         if (err < 0)
 981                 goto failure;
 982
 983         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 984
 985         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 986                 snd_printd("HW_PARAMS failed: %i\n", err);
 987                 goto failure;
 988         }
 989
 990         memset(sw_params, 0, sizeof(*sw_params));
 991         if (runtime->oss.trigger) {
 992                 sw_params->start_threshold = 1;
 993         } else {
 994                 sw_params->start_threshold = runtime->boundary;
 995         }
 996         if (atomic_read(&substream->mmap_count) ||
 997             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 998                 sw_params->stop_threshold = runtime->boundary;
 999         else
1000                 sw_params->stop_threshold = runtime->buffer_size;
1001         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1002         sw_params->period_step = 1;
1003         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1004                 1 : runtime->period_size;
1005         if (atomic_read(&substream->mmap_count) ||
1006             substream->oss.setup.nosilence) {
1007                 sw_params->silence_threshold = 0;
1008                 sw_params->silence_size = 0;
1009         } else {
1010                 snd_pcm_uframes_t frames;
1011                 frames = runtime->period_size + 16;
1012                 if (frames > runtime->buffer_size)
1013                         frames = runtime->buffer_size;
1014                 sw_params->silence_threshold = frames;
1015                 sw_params->silence_size = frames;
1016         }
1017
1018         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1019                 snd_printd("SW_PARAMS failed: %i\n", err);
1020                 goto failure;
1021         }
1022
1023         runtime->oss.periods = params_periods(sparams);
1024         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1025         if (oss_period_size < 0) {
1026                 err = -EINVAL;
1027                 goto failure;
1028         }
1029 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1030         if (runtime->oss.plugin_first) {
1031                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1032                 if (err < 0)
1033                         goto failure;
1034         }
1035 #endif
1036         oss_period_size *= oss_frame_size;
1037
1038         oss_buffer_size = oss_period_size * runtime->oss.periods;
1039         if (oss_buffer_size < 0) {
1040                 err = -EINVAL;
1041                 goto failure;
1042         }
1043
1044         runtime->oss.period_bytes = oss_period_size;
1045         runtime->oss.buffer_bytes = oss_buffer_size;
1046
1047         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1048                  runtime->oss.period_bytes,
1049                  runtime->oss.buffer_bytes);
1050         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1051                  params_period_size(sparams),
1052                  params_buffer_size(sparams));
1053
1054         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1055         runtime->oss.channels = params_channels(params);
1056         runtime->oss.rate = params_rate(params);
1057
1058         vfree(runtime->oss.buffer);
1059         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1060         if (!runtime->oss.buffer) {
1061                 err = -ENOMEM;
1062                 goto failure;
1063         }
1064
1065         runtime->oss.params = 0;
1066         runtime->oss.prepare = 1;
1067         runtime->oss.buffer_used = 0;
1068         if (runtime->dma_area)
1069                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1070
1071         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1072
1073         err = 0;
1074 failure:
1075         kfree(sw_params);
1076         kfree(params);
1077         kfree(sparams);
1078         mutex_unlock(&runtime->oss.params_lock);
1079         return err;
1080 }
1081
1082 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1083 {
1084         int idx, err;
1085         struct snd_pcm_substream *asubstream = NULL, *substream;
1086
1087         for (idx = 0; idx < 2; idx++) {
1088                 substream = pcm_oss_file->streams[idx];
1089                 if (substream == NULL)
1090                         continue;
1091                 if (asubstream == NULL)
1092                         asubstream = substream;
1093                 if (substream->runtime->oss.params) {
1094                         err = snd_pcm_oss_change_params(substream);
1095                         if (err < 0)
1096                                 return err;
1097                 }
1098         }
1099         if (!asubstream)
1100                 return -EIO;
1101         if (r_substream)
1102                 *r_substream = asubstream;
1103         return 0;
1104 }
1105
1106 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1107 {
1108         int err;
1109         struct snd_pcm_runtime *runtime = substream->runtime;
1110
1111         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1112         if (err < 0) {
1113                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1114                 return err;
1115         }
1116         runtime->oss.prepare = 0;
1117         runtime->oss.prev_hw_ptr_period = 0;
1118         runtime->oss.period_ptr = 0;
1119         runtime->oss.buffer_used = 0;
1120
1121         return 0;
1122 }
1123
1124 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1125 {
1126         struct snd_pcm_runtime *runtime;
1127         int err;
1128
1129         if (substream == NULL)
1130                 return 0;
1131         runtime = substream->runtime;
1132         if (runtime->oss.params) {
1133                 err = snd_pcm_oss_change_params(substream);
1134                 if (err < 0)
1135                         return err;
1136         }
1137         if (runtime->oss.prepare) {
1138                 err = snd_pcm_oss_prepare(substream);
1139                 if (err < 0)
1140                         return err;
1141         }
1142         return 0;
1143 }
1144
1145 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1146 {
1147         struct snd_pcm_runtime *runtime;
1148         snd_pcm_uframes_t frames;
1149         int err = 0;
1150
1151         while (1) {
1152                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1153                 if (err < 0)
1154                         break;
1155                 runtime = substream->runtime;
1156                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1157                         break;
1158                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1159                 /* until avail(delay) <= buffer_size */
1160                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1161                 frames /= runtime->period_size;
1162                 frames *= runtime->period_size;
1163                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1164                 if (err < 0)
1165                         break;
1166         }
1167         return err;
1168 }
1169
1170 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1171 {
1172         struct snd_pcm_runtime *runtime = substream->runtime;
1173         int ret;
1174         while (1) {
1175                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1176                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1177 #ifdef OSS_DEBUG
1178                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1179                                 printk(KERN_DEBUG "pcm_oss: write: "
1180                                        "recovering from XRUN\n");
1181                         else
1182                                 printk(KERN_DEBUG "pcm_oss: write: "
1183                                        "recovering from SUSPEND\n");
1184 #endif
1185                         ret = snd_pcm_oss_prepare(substream);
1186                         if (ret < 0)
1187                                 break;
1188                 }
1189                 if (in_kernel) {
1190                         mm_segment_t fs;
1191                         fs = snd_enter_user();
1192                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1193                         snd_leave_user(fs);
1194                 } else {
1195                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1196                 }
1197                 if (ret != -EPIPE && ret != -ESTRPIPE)
1198                         break;
1199                 /* test, if we can't store new data, because the stream */
1200                 /* has not been started */
1201                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202                         return -EAGAIN;
1203         }
1204         return ret;
1205 }
1206
1207 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208 {
1209         struct snd_pcm_runtime *runtime = substream->runtime;
1210         snd_pcm_sframes_t delay;
1211         int ret;
1212         while (1) {
1213                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215 #ifdef OSS_DEBUG
1216                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1217                                 printk(KERN_DEBUG "pcm_oss: read: "
1218                                        "recovering from XRUN\n");
1219                         else
1220                                 printk(KERN_DEBUG "pcm_oss: read: "
1221                                        "recovering from SUSPEND\n");
1222 #endif
1223                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1224                         if (ret < 0)
1225                                 break;
1226                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1227                         ret = snd_pcm_oss_prepare(substream);
1228                         if (ret < 0)
1229                                 break;
1230                 }
1231                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1232                 if (ret < 0)
1233                         break;
1234                 if (in_kernel) {
1235                         mm_segment_t fs;
1236                         fs = snd_enter_user();
1237                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1238                         snd_leave_user(fs);
1239                 } else {
1240                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1241                 }
1242                 if (ret == -EPIPE) {
1243                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1244                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1245                                 if (ret < 0)
1246                                         break;
1247                         }
1248                         continue;
1249                 }
1250                 if (ret != -ESTRPIPE)
1251                         break;
1252         }
1253         return ret;
1254 }
1255
1256 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1257 {
1258         struct snd_pcm_runtime *runtime = substream->runtime;
1259         int ret;
1260         while (1) {
1261                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1262                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1263 #ifdef OSS_DEBUG
1264                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1265                                 printk(KERN_DEBUG "pcm_oss: writev: "
1266                                        "recovering from XRUN\n");
1267                         else
1268                                 printk(KERN_DEBUG "pcm_oss: writev: "
1269                                        "recovering from SUSPEND\n");
1270 #endif
1271                         ret = snd_pcm_oss_prepare(substream);
1272                         if (ret < 0)
1273                                 break;
1274                 }
1275                 if (in_kernel) {
1276                         mm_segment_t fs;
1277                         fs = snd_enter_user();
1278                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279                         snd_leave_user(fs);
1280                 } else {
1281                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1282                 }
1283                 if (ret != -EPIPE && ret != -ESTRPIPE)
1284                         break;
1285
1286                 /* test, if we can't store new data, because the stream */
1287                 /* has not been started */
1288                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1289                         return -EAGAIN;
1290         }
1291         return ret;
1292 }
1293
1294 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1295 {
1296         struct snd_pcm_runtime *runtime = substream->runtime;
1297         int ret;
1298         while (1) {
1299                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1300                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1301 #ifdef OSS_DEBUG
1302                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1303                                 printk(KERN_DEBUG "pcm_oss: readv: "
1304                                        "recovering from XRUN\n");
1305                         else
1306                                 printk(KERN_DEBUG "pcm_oss: readv: "
1307                                        "recovering from SUSPEND\n");
1308 #endif
1309                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1310                         if (ret < 0)
1311                                 break;
1312                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1313                         ret = snd_pcm_oss_prepare(substream);
1314                         if (ret < 0)
1315                                 break;
1316                 }
1317                 if (in_kernel) {
1318                         mm_segment_t fs;
1319                         fs = snd_enter_user();
1320                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1321                         snd_leave_user(fs);
1322                 } else {
1323                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1324                 }
1325                 if (ret != -EPIPE && ret != -ESTRPIPE)
1326                         break;
1327         }
1328         return ret;
1329 }
1330
1331 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1332 {
1333         struct snd_pcm_runtime *runtime = substream->runtime;
1334         snd_pcm_sframes_t frames, frames1;
1335 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1336         if (runtime->oss.plugin_first) {
1337                 struct snd_pcm_plugin_channel *channels;
1338                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1339                 if (!in_kernel) {
1340                         if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1341                                 return -EFAULT;
1342                         buf = runtime->oss.buffer;
1343                 }
1344                 frames = bytes / oss_frame_bytes;
1345                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1346                 if (frames1 < 0)
1347                         return frames1;
1348                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1349                 if (frames1 <= 0)
1350                         return frames1;
1351                 bytes = frames1 * oss_frame_bytes;
1352         } else
1353 #endif
1354         {
1355                 frames = bytes_to_frames(runtime, bytes);
1356                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1357                 if (frames1 <= 0)
1358                         return frames1;
1359                 bytes = frames_to_bytes(runtime, frames1);
1360         }
1361         return bytes;
1362 }
1363
1364 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1365 {
1366         size_t xfer = 0;
1367         ssize_t tmp;
1368         struct snd_pcm_runtime *runtime = substream->runtime;
1369
1370         if (atomic_read(&substream->mmap_count))
1371                 return -ENXIO;
1372
1373         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1374                 return tmp;
1375         mutex_lock(&runtime->oss.params_lock);
1376         while (bytes > 0) {
1377                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1378                         tmp = bytes;
1379                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1380                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1381                         if (tmp > 0) {
1382                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1383                                         tmp = -EFAULT;
1384                                         goto err;
1385                                 }
1386                         }
1387                         runtime->oss.buffer_used += tmp;
1388                         buf += tmp;
1389                         bytes -= tmp;
1390                         xfer += tmp;
1391                         if (substream->oss.setup.partialfrag ||
1392                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1393                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1394                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1395                                 if (tmp <= 0)
1396                                         goto err;
1397                                 runtime->oss.bytes += tmp;
1398                                 runtime->oss.period_ptr += tmp;
1399                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1400                                 if (runtime->oss.period_ptr == 0 ||
1401                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1402                                         runtime->oss.buffer_used = 0;
1403                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1404                                         tmp = -EAGAIN;
1405                                         goto err;
1406                                 }
1407                         }
1408                 } else {
1409                         tmp = snd_pcm_oss_write2(substream,
1410                                                  (const char __force *)buf,
1411                                                  runtime->oss.period_bytes, 0);
1412                         if (tmp <= 0)
1413                                 goto err;
1414                         runtime->oss.bytes += tmp;
1415                         buf += tmp;
1416                         bytes -= tmp;
1417                         xfer += tmp;
1418                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1419                             tmp != runtime->oss.period_bytes)
1420                                 break;
1421                 }
1422         }
1423         mutex_unlock(&runtime->oss.params_lock);
1424         return xfer;
1425
1426  err:
1427         mutex_unlock(&runtime->oss.params_lock);
1428         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1429 }
1430
1431 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1432 {
1433         struct snd_pcm_runtime *runtime = substream->runtime;
1434         snd_pcm_sframes_t frames, frames1;
1435 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1436         char __user *final_dst = (char __force __user *)buf;
1437         if (runtime->oss.plugin_first) {
1438                 struct snd_pcm_plugin_channel *channels;
1439                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1440                 if (!in_kernel)
1441                         buf = runtime->oss.buffer;
1442                 frames = bytes / oss_frame_bytes;
1443                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1444                 if (frames1 < 0)
1445                         return frames1;
1446                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1447                 if (frames1 <= 0)
1448                         return frames1;
1449                 bytes = frames1 * oss_frame_bytes;
1450                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1451                         return -EFAULT;
1452         } else
1453 #endif
1454         {
1455                 frames = bytes_to_frames(runtime, bytes);
1456                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1457                 if (frames1 <= 0)
1458                         return frames1;
1459                 bytes = frames_to_bytes(runtime, frames1);
1460         }
1461         return bytes;
1462 }
1463
1464 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1465 {
1466         size_t xfer = 0;
1467         ssize_t tmp;
1468         struct snd_pcm_runtime *runtime = substream->runtime;
1469
1470         if (atomic_read(&substream->mmap_count))
1471                 return -ENXIO;
1472
1473         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1474                 return tmp;
1475         mutex_lock(&runtime->oss.params_lock);
1476         while (bytes > 0) {
1477                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1478                         if (runtime->oss.buffer_used == 0) {
1479                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1480                                 if (tmp <= 0)
1481                                         goto err;
1482                                 runtime->oss.bytes += tmp;
1483                                 runtime->oss.period_ptr = tmp;
1484                                 runtime->oss.buffer_used = tmp;
1485                         }
1486                         tmp = bytes;
1487                         if ((size_t) tmp > runtime->oss.buffer_used)
1488                                 tmp = runtime->oss.buffer_used;
1489                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1490                                 tmp = -EFAULT;
1491                                 goto err;
1492                         }
1493                         buf += tmp;
1494                         bytes -= tmp;
1495                         xfer += tmp;
1496                         runtime->oss.buffer_used -= tmp;
1497                 } else {
1498                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1499                                                 runtime->oss.period_bytes, 0);
1500                         if (tmp <= 0)
1501                                 goto err;
1502                         runtime->oss.bytes += tmp;
1503                         buf += tmp;
1504                         bytes -= tmp;
1505                         xfer += tmp;
1506                 }
1507         }
1508         mutex_unlock(&runtime->oss.params_lock);
1509         return xfer;
1510
1511  err:
1512         mutex_unlock(&runtime->oss.params_lock);
1513         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1514 }
1515
1516 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1517 {
1518         struct snd_pcm_substream *substream;
1519         struct snd_pcm_runtime *runtime;
1520         int i;
1521
1522         for (i = 0; i < 2; i++) {
1523                 substream = pcm_oss_file->streams[i];
1524                 if (!substream)
1525                         continue;
1526                 runtime = substream->runtime;
1527                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1528                 runtime->oss.prepare = 1;
1529                 runtime->oss.buffer_used = 0;
1530                 runtime->oss.prev_hw_ptr_period = 0;
1531                 runtime->oss.period_ptr = 0;
1532         }
1533         return 0;
1534 }
1535
1536 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1537 {
1538         struct snd_pcm_substream *substream;
1539         int err;
1540
1541         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1542         if (substream != NULL) {
1543                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1544                         return err;
1545                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1546         }
1547         /* note: all errors from the start action are ignored */
1548         /* OSS apps do not know, how to handle them */
1549         return 0;
1550 }
1551
1552 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1553 {
1554         struct snd_pcm_runtime *runtime;
1555         ssize_t result = 0;
1556         snd_pcm_state_t state;
1557         long res;
1558         wait_queue_t wait;
1559
1560         runtime = substream->runtime;
1561         init_waitqueue_entry(&wait, current);
1562         add_wait_queue(&runtime->sleep, &wait);
1563 #ifdef OSS_DEBUG
1564         printk(KERN_DEBUG "sync1: size = %li\n", size);
1565 #endif
1566         while (1) {
1567                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1568                 if (result > 0) {
1569                         runtime->oss.buffer_used = 0;
1570                         result = 0;
1571                         break;
1572                 }
1573                 if (result != 0 && result != -EAGAIN)
1574                         break;
1575                 result = 0;
1576                 set_current_state(TASK_INTERRUPTIBLE);
1577                 snd_pcm_stream_lock_irq(substream);
1578                 state = runtime->status->state;
1579                 snd_pcm_stream_unlock_irq(substream);
1580                 if (state != SNDRV_PCM_STATE_RUNNING) {
1581                         set_current_state(TASK_RUNNING);
1582                         break;
1583                 }
1584                 res = schedule_timeout(10 * HZ);
1585                 if (signal_pending(current)) {
1586                         result = -ERESTARTSYS;
1587                         break;
1588                 }
1589                 if (res == 0) {
1590                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1591                         result = -EIO;
1592                         break;
1593                 }
1594         }
1595         remove_wait_queue(&runtime->sleep, &wait);
1596         return result;
1597 }
1598
1599 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1600 {
1601         int err = 0;
1602         unsigned int saved_f_flags;
1603         struct snd_pcm_substream *substream;
1604         struct snd_pcm_runtime *runtime;
1605         snd_pcm_format_t format;
1606         unsigned long width;
1607         size_t size;
1608
1609         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1610         if (substream != NULL) {
1611                 runtime = substream->runtime;
1612                 if (atomic_read(&substream->mmap_count))
1613                         goto __direct;
1614                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1615                         return err;
1616                 format = snd_pcm_oss_format_from(runtime->oss.format);
1617                 width = snd_pcm_format_physical_width(format);
1618                 mutex_lock(&runtime->oss.params_lock);
1619                 if (runtime->oss.buffer_used > 0) {
1620 #ifdef OSS_DEBUG
1621                         printk(KERN_DEBUG "sync: buffer_used\n");
1622 #endif
1623                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1624                         snd_pcm_format_set_silence(format,
1625                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1626                                                    size);
1627                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1628                         if (err < 0) {
1629                                 mutex_unlock(&runtime->oss.params_lock);
1630                                 return err;
1631                         }
1632                 } else if (runtime->oss.period_ptr > 0) {
1633 #ifdef OSS_DEBUG
1634                         printk(KERN_DEBUG "sync: period_ptr\n");
1635 #endif
1636                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1637                         snd_pcm_format_set_silence(format,
1638                                                    runtime->oss.buffer,
1639                                                    size * 8 / width);
1640                         err = snd_pcm_oss_sync1(substream, size);
1641                         if (err < 0) {
1642                                 mutex_unlock(&runtime->oss.params_lock);
1643                                 return err;
1644                         }
1645                 }
1646                 /*
1647                  * The ALSA's period might be a bit large than OSS one.
1648                  * Fill the remain portion of ALSA period with zeros.
1649                  */
1650                 size = runtime->control->appl_ptr % runtime->period_size;
1651                 if (size > 0) {
1652                         size = runtime->period_size - size;
1653                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1654                                 size = (runtime->frame_bits * size) / 8;
1655                                 while (size > 0) {
1656                                         mm_segment_t fs;
1657                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1658                                         size -= size1;
1659                                         size1 *= 8;
1660                                         size1 /= runtime->sample_bits;
1661                                         snd_pcm_format_set_silence(runtime->format,
1662                                                                    runtime->oss.buffer,
1663                                                                    size1);
1664                                         size1 /= runtime->channels; /* frames */
1665                                         fs = snd_enter_user();
1666                                         snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1667                                         snd_leave_user(fs);
1668                                 }
1669                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1670                                 void __user *buffers[runtime->channels];
1671                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1672                                 snd_pcm_lib_writev(substream, buffers, size);
1673                         }
1674                 }
1675                 mutex_unlock(&runtime->oss.params_lock);
1676                 /*
1677                  * finish sync: drain the buffer
1678                  */
1679               __direct:
1680                 saved_f_flags = substream->f_flags;
1681                 substream->f_flags &= ~O_NONBLOCK;
1682                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1683                 substream->f_flags = saved_f_flags;
1684                 if (err < 0)
1685                         return err;
1686                 runtime->oss.prepare = 1;
1687         }
1688
1689         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1690         if (substream != NULL) {
1691                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1692                         return err;
1693                 runtime = substream->runtime;
1694                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1695                 if (err < 0)
1696                         return err;
1697                 runtime->oss.buffer_used = 0;
1698                 runtime->oss.prepare = 1;
1699         }
1700         return 0;
1701 }
1702
1703 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1704 {
1705         int idx;
1706
1707         for (idx = 1; idx >= 0; --idx) {
1708                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1709                 struct snd_pcm_runtime *runtime;
1710                 if (substream == NULL)
1711                         continue;
1712                 runtime = substream->runtime;
1713                 if (rate < 1000)
1714                         rate = 1000;
1715                 else if (rate > 192000)
1716                         rate = 192000;
1717                 if (runtime->oss.rate != rate) {
1718                         runtime->oss.params = 1;
1719                         runtime->oss.rate = rate;
1720                 }
1721         }
1722         return snd_pcm_oss_get_rate(pcm_oss_file);
1723 }
1724
1725 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1726 {
1727         struct snd_pcm_substream *substream;
1728         int err;
1729
1730         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1731                 return err;
1732         return substream->runtime->oss.rate;
1733 }
1734
1735 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1736 {
1737         int idx;
1738         if (channels < 1)
1739                 channels = 1;
1740         if (channels > 128)
1741                 return -EINVAL;
1742         for (idx = 1; idx >= 0; --idx) {
1743                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1744                 struct snd_pcm_runtime *runtime;
1745                 if (substream == NULL)
1746                         continue;
1747                 runtime = substream->runtime;
1748                 if (runtime->oss.channels != channels) {
1749                         runtime->oss.params = 1;
1750                         runtime->oss.channels = channels;
1751                 }
1752         }
1753         return snd_pcm_oss_get_channels(pcm_oss_file);
1754 }
1755
1756 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1757 {
1758         struct snd_pcm_substream *substream;
1759         int err;
1760
1761         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762                 return err;
1763         return substream->runtime->oss.channels;
1764 }
1765
1766 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1767 {
1768         struct snd_pcm_substream *substream;
1769         int err;
1770
1771         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1772                 return err;
1773         return substream->runtime->oss.period_bytes;
1774 }
1775
1776 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1777 {
1778         struct snd_pcm_substream *substream;
1779         int err;
1780         int direct;
1781         struct snd_pcm_hw_params *params;
1782         unsigned int formats = 0;
1783         struct snd_mask format_mask;
1784         int fmt;
1785
1786         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1787                 return err;
1788         if (atomic_read(&substream->mmap_count))
1789                 direct = 1;
1790         else
1791                 direct = substream->oss.setup.direct;
1792         if (!direct)
1793                 return AFMT_MU_LAW | AFMT_U8 |
1794                        AFMT_S16_LE | AFMT_S16_BE |
1795                        AFMT_S8 | AFMT_U16_LE |
1796                        AFMT_U16_BE |
1797                         AFMT_S32_LE | AFMT_S32_BE |
1798                         AFMT_S24_LE | AFMT_S24_BE |
1799                         AFMT_S24_PACKED;
1800         params = kmalloc(sizeof(*params), GFP_KERNEL);
1801         if (!params)
1802                 return -ENOMEM;
1803         _snd_pcm_hw_params_any(params);
1804         err = snd_pcm_hw_refine(substream, params);
1805         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1806         kfree(params);
1807         if (err < 0)
1808                 return err;
1809         for (fmt = 0; fmt < 32; ++fmt) {
1810                 if (snd_mask_test(&format_mask, fmt)) {
1811                         int f = snd_pcm_oss_format_to(fmt);
1812                         if (f >= 0)
1813                                 formats |= f;
1814                 }
1815         }
1816         return formats;
1817 }
1818
1819 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1820 {
1821         int formats, idx;
1822
1823         if (format != AFMT_QUERY) {
1824                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1825                 if (formats < 0)
1826                         return formats;
1827                 if (!(formats & format))
1828                         format = AFMT_U8;
1829                 for (idx = 1; idx >= 0; --idx) {
1830                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1831                         struct snd_pcm_runtime *runtime;
1832                         if (substream == NULL)
1833                                 continue;
1834                         runtime = substream->runtime;
1835                         if (runtime->oss.format != format) {
1836                                 runtime->oss.params = 1;
1837                                 runtime->oss.format = format;
1838                         }
1839                 }
1840         }
1841         return snd_pcm_oss_get_format(pcm_oss_file);
1842 }
1843
1844 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1845 {
1846         struct snd_pcm_substream *substream;
1847         int err;
1848
1849         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1850                 return err;
1851         return substream->runtime->oss.format;
1852 }
1853
1854 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1855 {
1856         struct snd_pcm_runtime *runtime;
1857
1858         if (substream == NULL)
1859                 return 0;
1860         runtime = substream->runtime;
1861         if (subdivide == 0) {
1862                 subdivide = runtime->oss.subdivision;
1863                 if (subdivide == 0)
1864                         subdivide = 1;
1865                 return subdivide;
1866         }
1867         if (runtime->oss.subdivision || runtime->oss.fragshift)
1868                 return -EINVAL;
1869         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1870             subdivide != 8 && subdivide != 16)
1871                 return -EINVAL;
1872         runtime->oss.subdivision = subdivide;
1873         runtime->oss.params = 1;
1874         return subdivide;
1875 }
1876
1877 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1878 {
1879         int err = -EINVAL, idx;
1880
1881         for (idx = 1; idx >= 0; --idx) {
1882                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1883                 if (substream == NULL)
1884                         continue;
1885                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1886                         return err;
1887         }
1888         return err;
1889 }
1890
1891 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1892 {
1893         struct snd_pcm_runtime *runtime;
1894
1895         if (substream == NULL)
1896                 return 0;
1897         runtime = substream->runtime;
1898         if (runtime->oss.subdivision || runtime->oss.fragshift)
1899                 return -EINVAL;
1900         runtime->oss.fragshift = val & 0xffff;
1901         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1902         if (runtime->oss.fragshift < 4)         /* < 16 */
1903                 runtime->oss.fragshift = 4;
1904         if (runtime->oss.maxfrags < 2)
1905                 runtime->oss.maxfrags = 2;
1906         runtime->oss.params = 1;
1907         return 0;
1908 }
1909
1910 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1911 {
1912         int err = -EINVAL, idx;
1913
1914         for (idx = 1; idx >= 0; --idx) {
1915                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1916                 if (substream == NULL)
1917                         continue;
1918                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1919                         return err;
1920         }
1921         return err;
1922 }
1923
1924 static int snd_pcm_oss_nonblock(struct file * file)
1925 {
1926         spin_lock(&file->f_lock);
1927         file->f_flags |= O_NONBLOCK;
1928         spin_unlock(&file->f_lock);
1929         return 0;
1930 }
1931
1932 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1933 {
1934
1935         if (substream == NULL) {
1936                 res &= ~DSP_CAP_DUPLEX;
1937                 return res;
1938         }
1939 #ifdef DSP_CAP_MULTI
1940         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1941                 if (substream->pstr->substream_count > 1)
1942                         res |= DSP_CAP_MULTI;
1943 #endif
1944         /* DSP_CAP_REALTIME is set all times: */
1945         /* all ALSA drivers can return actual pointer in ring buffer */
1946 #if defined(DSP_CAP_REALTIME) && 0
1947         {
1948                 struct snd_pcm_runtime *runtime = substream->runtime;
1949                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1950                         res &= ~DSP_CAP_REALTIME;
1951         }
1952 #endif
1953         return res;
1954 }
1955
1956 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1957 {
1958         int result, idx;
1959
1960         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1961         for (idx = 0; idx < 2; idx++) {
1962                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1963                 result = snd_pcm_oss_get_caps1(substream, result);
1964         }
1965         result |= 0x0001;       /* revision - same as SB AWE 64 */
1966         return result;
1967 }
1968
1969 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1970                                       snd_pcm_uframes_t hw_ptr)
1971 {
1972         struct snd_pcm_runtime *runtime = substream->runtime;
1973         snd_pcm_uframes_t appl_ptr;
1974         appl_ptr = hw_ptr + runtime->buffer_size;
1975         appl_ptr %= runtime->boundary;
1976         runtime->control->appl_ptr = appl_ptr;
1977 }
1978
1979 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1980 {
1981         struct snd_pcm_runtime *runtime;
1982         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1983         int err, cmd;
1984
1985 #ifdef OSS_DEBUG
1986         printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1987 #endif
1988
1989         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1990         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1991
1992         if (psubstream) {
1993                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1994                         return err;
1995         }
1996         if (csubstream) {
1997                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1998                         return err;
1999         }
2000         if (psubstream) {
2001                 runtime = psubstream->runtime;
2002                 if (trigger & PCM_ENABLE_OUTPUT) {
2003                         if (runtime->oss.trigger)
2004                                 goto _skip1;
2005                         if (atomic_read(&psubstream->mmap_count))
2006                                 snd_pcm_oss_simulate_fill(psubstream,
2007                                                 get_hw_ptr_period(runtime));
2008                         runtime->oss.trigger = 1;
2009                         runtime->start_threshold = 1;
2010                         cmd = SNDRV_PCM_IOCTL_START;
2011                 } else {
2012                         if (!runtime->oss.trigger)
2013                                 goto _skip1;
2014                         runtime->oss.trigger = 0;
2015                         runtime->start_threshold = runtime->boundary;
2016                         cmd = SNDRV_PCM_IOCTL_DROP;
2017                         runtime->oss.prepare = 1;
2018                 }
2019                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2020                 if (err < 0)
2021                         return err;
2022         }
2023  _skip1:
2024         if (csubstream) {
2025                 runtime = csubstream->runtime;
2026                 if (trigger & PCM_ENABLE_INPUT) {
2027                         if (runtime->oss.trigger)
2028                                 goto _skip2;
2029                         runtime->oss.trigger = 1;
2030                         runtime->start_threshold = 1;
2031                         cmd = SNDRV_PCM_IOCTL_START;
2032                 } else {
2033                         if (!runtime->oss.trigger)
2034                                 goto _skip2;
2035                         runtime->oss.trigger = 0;
2036                         runtime->start_threshold = runtime->boundary;
2037                         cmd = SNDRV_PCM_IOCTL_DROP;
2038                         runtime->oss.prepare = 1;
2039                 }
2040                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2041                 if (err < 0)
2042                         return err;
2043         }
2044  _skip2:
2045         return 0;
2046 }
2047
2048 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2049 {
2050         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2051         int result = 0;
2052
2053         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2054         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2055         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2056                 result |= PCM_ENABLE_OUTPUT;
2057         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2058                 result |= PCM_ENABLE_INPUT;
2059         return result;
2060 }
2061
2062 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2063 {
2064         struct snd_pcm_substream *substream;
2065         struct snd_pcm_runtime *runtime;
2066         snd_pcm_sframes_t delay;
2067         int err;
2068
2069         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2070         if (substream == NULL)
2071                 return -EINVAL;
2072         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2073                 return err;
2074         runtime = substream->runtime;
2075         if (runtime->oss.params || runtime->oss.prepare)
2076                 return 0;
2077         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2078         if (err == -EPIPE)
2079                 delay = 0;      /* hack for broken OSS applications */
2080         else if (err < 0)
2081                 return err;
2082         return snd_pcm_oss_bytes(substream, delay);
2083 }
2084
2085 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2086 {
2087         struct snd_pcm_substream *substream;
2088         struct snd_pcm_runtime *runtime;
2089         snd_pcm_sframes_t delay;
2090         int fixup;
2091         struct count_info info;
2092         int err;
2093
2094         if (_info == NULL)
2095                 return -EFAULT;
2096         substream = pcm_oss_file->streams[stream];
2097         if (substream == NULL)
2098                 return -EINVAL;
2099         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2100                 return err;
2101         runtime = substream->runtime;
2102         if (runtime->oss.params || runtime->oss.prepare) {
2103                 memset(&info, 0, sizeof(info));
2104                 if (copy_to_user(_info, &info, sizeof(info)))
2105                         return -EFAULT;
2106                 return 0;
2107         }
2108         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2109                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2110                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2111                         err = 0;
2112                         delay = 0;
2113                         fixup = 0;
2114                 } else {
2115                         fixup = runtime->oss.buffer_used;
2116                 }
2117         } else {
2118                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2119                 fixup = -runtime->oss.buffer_used;
2120         }
2121         if (err < 0)
2122                 return err;
2123         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2124         if (atomic_read(&substream->mmap_count)) {
2125                 snd_pcm_sframes_t n;
2126                 delay = get_hw_ptr_period(runtime);
2127                 n = delay - runtime->oss.prev_hw_ptr_period;
2128                 if (n < 0)
2129                         n += runtime->boundary;
2130                 info.blocks = n / runtime->period_size;
2131                 runtime->oss.prev_hw_ptr_period = delay;
2132                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2133                         snd_pcm_oss_simulate_fill(substream, delay);
2134                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2135         } else {
2136                 delay = snd_pcm_oss_bytes(substream, delay);
2137                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2138                         if (substream->oss.setup.buggyptr)
2139                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2140                         else
2141                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2142                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2143                 } else {
2144                         delay += fixup;
2145                         info.blocks = delay / runtime->oss.period_bytes;
2146                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2147                 }
2148         }
2149         if (copy_to_user(_info, &info, sizeof(info)))
2150                 return -EFAULT;
2151         return 0;
2152 }
2153
2154 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2155 {
2156         struct snd_pcm_substream *substream;
2157         struct snd_pcm_runtime *runtime;
2158         snd_pcm_sframes_t avail;
2159         int fixup;
2160         struct audio_buf_info info;
2161         int err;
2162
2163         if (_info == NULL)
2164                 return -EFAULT;
2165         substream = pcm_oss_file->streams[stream];
2166         if (substream == NULL)
2167                 return -EINVAL;
2168         runtime = substream->runtime;
2169
2170         if (runtime->oss.params &&
2171             (err = snd_pcm_oss_change_params(substream)) < 0)
2172                 return err;
2173
2174         info.fragsize = runtime->oss.period_bytes;
2175         info.fragstotal = runtime->periods;
2176         if (runtime->oss.prepare) {
2177                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2178                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2179                         info.fragments = runtime->oss.periods;
2180                 } else {
2181                         info.bytes = 0;
2182                         info.fragments = 0;
2183                 }
2184         } else {
2185                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2186                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2187                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2188                                 avail = runtime->buffer_size;
2189                                 err = 0;
2190                                 fixup = 0;
2191                         } else {
2192                                 avail = runtime->buffer_size - avail;
2193                                 fixup = -runtime->oss.buffer_used;
2194                         }
2195                 } else {
2196                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2197                         fixup = runtime->oss.buffer_used;
2198                 }
2199                 if (err < 0)
2200                         return err;
2201                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2202                 info.fragments = info.bytes / runtime->oss.period_bytes;
2203         }
2204
2205 #ifdef OSS_DEBUG
2206         printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2207                "fragstotal = %i, fragsize = %i\n",
2208                info.bytes, info.fragments, info.fragstotal, info.fragsize);
2209 #endif
2210         if (copy_to_user(_info, &info, sizeof(info)))
2211                 return -EFAULT;
2212         return 0;
2213 }
2214
2215 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2216 {
2217         // it won't be probably implemented
2218         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2219         return -EINVAL;
2220 }
2221
2222 static const char *strip_task_path(const char *path)
2223 {
2224         const char *ptr, *ptrl = NULL;
2225         for (ptr = path; *ptr; ptr++) {
2226                 if (*ptr == '/')
2227                         ptrl = ptr + 1;
2228         }
2229         return ptrl;
2230 }
2231
2232 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2233                                       const char *task_name,
2234                                       struct snd_pcm_oss_setup *rsetup)
2235 {
2236         struct snd_pcm_oss_setup *setup;
2237
2238         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2239         do {
2240                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2241                      setup = setup->next) {
2242                         if (!strcmp(setup->task_name, task_name))
2243                                 goto out;
2244                 }
2245         } while ((task_name = strip_task_path(task_name)) != NULL);
2246  out:
2247         if (setup)
2248                 *rsetup = *setup;
2249         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2250 }
2251
2252 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2253 {
2254         struct snd_pcm_runtime *runtime;
2255         runtime = substream->runtime;
2256         vfree(runtime->oss.buffer);
2257         runtime->oss.buffer = NULL;
2258 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2259         snd_pcm_oss_plugin_clear(substream);
2260 #endif
2261         substream->oss.oss = 0;
2262 }
2263
2264 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2265                                        struct snd_pcm_oss_setup *setup,
2266                                        int minor)
2267 {
2268         struct snd_pcm_runtime *runtime;
2269
2270         substream->oss.oss = 1;
2271         substream->oss.setup = *setup;
2272         if (setup->nonblock)
2273                 substream->f_flags |= O_NONBLOCK;
2274         else if (setup->block)
2275                 substream->f_flags &= ~O_NONBLOCK;
2276         runtime = substream->runtime;
2277         runtime->oss.params = 1;
2278         runtime->oss.trigger = 1;
2279         runtime->oss.rate = 8000;
2280         mutex_init(&runtime->oss.params_lock);
2281         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2282         case SNDRV_MINOR_OSS_PCM_8:
2283                 runtime->oss.format = AFMT_U8;
2284                 break;
2285         case SNDRV_MINOR_OSS_PCM_16:
2286                 runtime->oss.format = AFMT_S16_LE;
2287                 break;
2288         default:
2289                 runtime->oss.format = AFMT_MU_LAW;
2290         }
2291         runtime->oss.channels = 1;
2292         runtime->oss.fragshift = 0;
2293         runtime->oss.maxfrags = 0;
2294         runtime->oss.subdivision = 0;
2295         substream->pcm_release = snd_pcm_oss_release_substream;
2296 }
2297
2298 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2299 {
2300         int cidx;
2301         if (!pcm_oss_file)
2302                 return 0;
2303         for (cidx = 0; cidx < 2; ++cidx) {
2304                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2305                 if (substream)
2306                         snd_pcm_release_substream(substream);
2307         }
2308         kfree(pcm_oss_file);
2309         return 0;
2310 }
2311
2312 static int snd_pcm_oss_open_file(struct file *file,
2313                                  struct snd_pcm *pcm,
2314                                  struct snd_pcm_oss_file **rpcm_oss_file,
2315                                  int minor,
2316                                  struct snd_pcm_oss_setup *setup)
2317 {
2318         int idx, err;
2319         struct snd_pcm_oss_file *pcm_oss_file;
2320         struct snd_pcm_substream *substream;
2321         fmode_t f_mode = file->f_mode;
2322
2323         if (rpcm_oss_file)
2324                 *rpcm_oss_file = NULL;
2325
2326         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2327         if (pcm_oss_file == NULL)
2328                 return -ENOMEM;
2329
2330         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2331             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2332                 f_mode = FMODE_WRITE;
2333
2334         file->f_flags &= ~O_APPEND;
2335         for (idx = 0; idx < 2; idx++) {
2336                 if (setup[idx].disable)
2337                         continue;
2338                 if (! pcm->streams[idx].substream_count)
2339                         continue; /* no matching substream */
2340                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2341                         if (! (f_mode & FMODE_WRITE))
2342                                 continue;
2343                 } else {
2344                         if (! (f_mode & FMODE_READ))
2345                                 continue;
2346                 }
2347                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2348                 if (err < 0) {
2349                         snd_pcm_oss_release_file(pcm_oss_file);
2350                         return err;
2351                 }
2352
2353                 pcm_oss_file->streams[idx] = substream;
2354                 substream->file = pcm_oss_file;
2355                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2356         }
2357
2358         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2359                 snd_pcm_oss_release_file(pcm_oss_file);
2360                 return -EINVAL;
2361         }
2362
2363         file->private_data = pcm_oss_file;
2364         if (rpcm_oss_file)
2365                 *rpcm_oss_file = pcm_oss_file;
2366         return 0;
2367 }
2368
2369
2370 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2371 {
2372         unsigned int idx;
2373
2374         if (snd_BUG_ON(!task || !name || size < 2))
2375                 return -EINVAL;
2376         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2377                 name[idx] = task->comm[idx];
2378         name[idx] = '\0';
2379         return 0;
2380 }
2381
2382 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2383 {
2384         int err;
2385         char task_name[32];
2386         struct snd_pcm *pcm;
2387         struct snd_pcm_oss_file *pcm_oss_file;
2388         struct snd_pcm_oss_setup setup[2];
2389         int nonblock;
2390         wait_queue_t wait;
2391
2392         err = nonseekable_open(inode, file);
2393         if (err < 0)
2394                 return err;
2395
2396         pcm = snd_lookup_oss_minor_data(iminor(inode),
2397                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2398         if (pcm == NULL) {
2399                 err = -ENODEV;
2400                 goto __error1;
2401         }
2402         err = snd_card_file_add(pcm->card, file);
2403         if (err < 0)
2404                 goto __error1;
2405         if (!try_module_get(pcm->card->module)) {
2406                 err = -EFAULT;
2407                 goto __error2;
2408         }
2409         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2410                 err = -EFAULT;
2411                 goto __error;
2412         }
2413         memset(setup, 0, sizeof(setup));
2414         if (file->f_mode & FMODE_WRITE)
2415                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2416                                            task_name, &setup[0]);
2417         if (file->f_mode & FMODE_READ)
2418                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2419                                            task_name, &setup[1]);
2420
2421         nonblock = !!(file->f_flags & O_NONBLOCK);
2422         if (!nonblock)
2423                 nonblock = nonblock_open;
2424
2425         init_waitqueue_entry(&wait, current);
2426         add_wait_queue(&pcm->open_wait, &wait);
2427         mutex_lock(&pcm->open_mutex);
2428         while (1) {
2429                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2430                                             iminor(inode), setup);
2431                 if (err >= 0)
2432                         break;
2433                 if (err == -EAGAIN) {
2434                         if (nonblock) {
2435                                 err = -EBUSY;
2436                                 break;
2437                         }
2438                 } else
2439                         break;
2440                 set_current_state(TASK_INTERRUPTIBLE);
2441                 mutex_unlock(&pcm->open_mutex);
2442                 schedule();
2443                 mutex_lock(&pcm->open_mutex);
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         return err;
2454
2455       __error:
2456         module_put(pcm->card->module);
2457       __error2:
2458         snd_card_file_remove(pcm->card, file);
2459       __error1:
2460         return err;
2461 }
2462
2463 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2464 {
2465         struct snd_pcm *pcm;
2466         struct snd_pcm_substream *substream;
2467         struct snd_pcm_oss_file *pcm_oss_file;
2468
2469         pcm_oss_file = file->private_data;
2470         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2471         if (substream == NULL)
2472                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2473         if (snd_BUG_ON(!substream))
2474                 return -ENXIO;
2475         pcm = substream->pcm;
2476         if (!pcm->card->shutdown)
2477                 snd_pcm_oss_sync(pcm_oss_file);
2478         mutex_lock(&pcm->open_mutex);
2479         snd_pcm_oss_release_file(pcm_oss_file);
2480         mutex_unlock(&pcm->open_mutex);
2481         wake_up(&pcm->open_wait);
2482         module_put(pcm->card->module);
2483         snd_card_file_remove(pcm->card, file);
2484         return 0;
2485 }
2486
2487 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2488 {
2489         struct snd_pcm_oss_file *pcm_oss_file;
2490         int __user *p = (int __user *)arg;
2491         int res;
2492
2493         pcm_oss_file = file->private_data;
2494         if (cmd == OSS_GETVERSION)
2495                 return put_user(SNDRV_OSS_VERSION, p);
2496         if (cmd == OSS_ALSAEMULVER)
2497                 return put_user(1, p);
2498 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2499         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2500                 struct snd_pcm_substream *substream;
2501                 int idx;
2502                 for (idx = 0; idx < 2; ++idx) {
2503                         substream = pcm_oss_file->streams[idx];
2504                         if (substream != NULL)
2505                                 break;
2506                 }
2507                 if (snd_BUG_ON(idx >= 2))
2508                         return -ENXIO;
2509                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2510         }
2511 #endif
2512         if (((cmd >> 8) & 0xff) != 'P')
2513                 return -EINVAL;
2514 #ifdef OSS_DEBUG
2515         printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2516 #endif
2517         switch (cmd) {
2518         case SNDCTL_DSP_RESET:
2519                 return snd_pcm_oss_reset(pcm_oss_file);
2520         case SNDCTL_DSP_SYNC:
2521                 return snd_pcm_oss_sync(pcm_oss_file);
2522         case SNDCTL_DSP_SPEED:
2523                 if (get_user(res, p))
2524                         return -EFAULT;
2525                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2526                         return res;
2527                 return put_user(res, p);
2528         case SOUND_PCM_READ_RATE:
2529                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2530                 if (res < 0)
2531                         return res;
2532                 return put_user(res, p);
2533         case SNDCTL_DSP_STEREO:
2534                 if (get_user(res, p))
2535                         return -EFAULT;
2536                 res = res > 0 ? 2 : 1;
2537                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2538                         return res;
2539                 return put_user(--res, p);
2540         case SNDCTL_DSP_GETBLKSIZE:
2541                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2542                 if (res < 0)
2543                         return res;
2544                 return put_user(res, p);
2545         case SNDCTL_DSP_SETFMT:
2546                 if (get_user(res, p))
2547                         return -EFAULT;
2548                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2549                 if (res < 0)
2550                         return res;
2551                 return put_user(res, p);
2552         case SOUND_PCM_READ_BITS:
2553                 res = snd_pcm_oss_get_format(pcm_oss_file);
2554                 if (res < 0)
2555                         return res;
2556                 return put_user(res, p);
2557         case SNDCTL_DSP_CHANNELS:
2558                 if (get_user(res, p))
2559                         return -EFAULT;
2560                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2561                 if (res < 0)
2562                         return res;
2563                 return put_user(res, p);
2564         case SOUND_PCM_READ_CHANNELS:
2565                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2566                 if (res < 0)
2567                         return res;
2568                 return put_user(res, p);
2569         case SOUND_PCM_WRITE_FILTER:
2570         case SOUND_PCM_READ_FILTER:
2571                 return -EIO;
2572         case SNDCTL_DSP_POST:
2573                 return snd_pcm_oss_post(pcm_oss_file);
2574         case SNDCTL_DSP_SUBDIVIDE:
2575                 if (get_user(res, p))
2576                         return -EFAULT;
2577                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2578                 if (res < 0)
2579                         return res;
2580                 return put_user(res, p);
2581         case SNDCTL_DSP_SETFRAGMENT:
2582                 if (get_user(res, p))
2583                         return -EFAULT;
2584                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2585         case SNDCTL_DSP_GETFMTS:
2586                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2587                 if (res < 0)
2588                         return res;
2589                 return put_user(res, p);
2590         case SNDCTL_DSP_GETOSPACE:
2591         case SNDCTL_DSP_GETISPACE:
2592                 return snd_pcm_oss_get_space(pcm_oss_file,
2593                         cmd == SNDCTL_DSP_GETISPACE ?
2594                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2595                         (struct audio_buf_info __user *) arg);
2596         case SNDCTL_DSP_NONBLOCK:
2597                 return snd_pcm_oss_nonblock(file);
2598         case SNDCTL_DSP_GETCAPS:
2599                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2600                 if (res < 0)
2601                         return res;
2602                 return put_user(res, p);
2603         case SNDCTL_DSP_GETTRIGGER:
2604                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2605                 if (res < 0)
2606                         return res;
2607                 return put_user(res, p);
2608         case SNDCTL_DSP_SETTRIGGER:
2609                 if (get_user(res, p))
2610                         return -EFAULT;
2611                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2612         case SNDCTL_DSP_GETIPTR:
2613         case SNDCTL_DSP_GETOPTR:
2614                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2615                         cmd == SNDCTL_DSP_GETIPTR ?
2616                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2617                         (struct count_info __user *) arg);
2618         case SNDCTL_DSP_MAPINBUF:
2619         case SNDCTL_DSP_MAPOUTBUF:
2620                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2621                         cmd == SNDCTL_DSP_MAPINBUF ?
2622                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2623                         (struct buffmem_desc __user *) arg);
2624         case SNDCTL_DSP_SETSYNCRO:
2625                 /* stop DMA now.. */
2626                 return 0;
2627         case SNDCTL_DSP_SETDUPLEX:
2628                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2629                         return 0;
2630                 return -EIO;
2631         case SNDCTL_DSP_GETODELAY:
2632                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2633                 if (res < 0) {
2634                         /* it's for sure, some broken apps don't check for error codes */
2635                         put_user(0, p);
2636                         return res;
2637                 }
2638                 return put_user(res, p);
2639         case SNDCTL_DSP_PROFILE:
2640                 return 0;       /* silently ignore */
2641         default:
2642                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2643         }
2644         return -EINVAL;
2645 }
2646
2647 #ifdef CONFIG_COMPAT
2648 /* all compatible */
2649 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2650 #else
2651 #define snd_pcm_oss_ioctl_compat        NULL
2652 #endif
2653
2654 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2655 {
2656         struct snd_pcm_oss_file *pcm_oss_file;
2657         struct snd_pcm_substream *substream;
2658
2659         pcm_oss_file = file->private_data;
2660         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2661         if (substream == NULL)
2662                 return -ENXIO;
2663         substream->f_flags = file->f_flags & O_NONBLOCK;
2664 #ifndef OSS_DEBUG
2665         return snd_pcm_oss_read1(substream, buf, count);
2666 #else
2667         {
2668                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2669                 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2670                        "(returned %li bytes)\n", (long)count, (long)res);
2671                 return res;
2672         }
2673 #endif
2674 }
2675
2676 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2677 {
2678         struct snd_pcm_oss_file *pcm_oss_file;
2679         struct snd_pcm_substream *substream;
2680         long result;
2681
2682         pcm_oss_file = file->private_data;
2683         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2684         if (substream == NULL)
2685                 return -ENXIO;
2686         substream->f_flags = file->f_flags & O_NONBLOCK;
2687         result = snd_pcm_oss_write1(substream, buf, count);
2688 #ifdef OSS_DEBUG
2689         printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2690                (long)count, (long)result);
2691 #endif
2692         return result;
2693 }
2694
2695 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2696 {
2697         struct snd_pcm_runtime *runtime = substream->runtime;
2698         if (atomic_read(&substream->mmap_count))
2699                 return runtime->oss.prev_hw_ptr_period !=
2700                                                 get_hw_ptr_period(runtime);
2701         else
2702                 return snd_pcm_playback_avail(runtime) >=
2703                                                 runtime->oss.period_frames;
2704 }
2705
2706 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2707 {
2708         struct snd_pcm_runtime *runtime = substream->runtime;
2709         if (atomic_read(&substream->mmap_count))
2710                 return runtime->oss.prev_hw_ptr_period !=
2711                                                 get_hw_ptr_period(runtime);
2712         else
2713                 return snd_pcm_capture_avail(runtime) >=
2714                                                 runtime->oss.period_frames;
2715 }
2716
2717 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2718 {
2719         struct snd_pcm_oss_file *pcm_oss_file;
2720         unsigned int mask;
2721         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2722
2723         pcm_oss_file = file->private_data;
2724
2725         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2726         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2727
2728         mask = 0;
2729         if (psubstream != NULL) {
2730                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2731                 poll_wait(file, &runtime->sleep, wait);
2732                 snd_pcm_stream_lock_irq(psubstream);
2733                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2734                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2735                      snd_pcm_oss_playback_ready(psubstream)))
2736                         mask |= POLLOUT | POLLWRNORM;
2737                 snd_pcm_stream_unlock_irq(psubstream);
2738         }
2739         if (csubstream != NULL) {
2740                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2741                 snd_pcm_state_t ostate;
2742                 poll_wait(file, &runtime->sleep, wait);
2743                 snd_pcm_stream_lock_irq(csubstream);
2744                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2745                     snd_pcm_oss_capture_ready(csubstream))
2746                         mask |= POLLIN | POLLRDNORM;
2747                 snd_pcm_stream_unlock_irq(csubstream);
2748                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2749                         struct snd_pcm_oss_file ofile;
2750                         memset(&ofile, 0, sizeof(ofile));
2751                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2752                         runtime->oss.trigger = 0;
2753                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2754                 }
2755         }
2756
2757         return mask;
2758 }
2759
2760 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2761 {
2762         struct snd_pcm_oss_file *pcm_oss_file;
2763         struct snd_pcm_substream *substream = NULL;
2764         struct snd_pcm_runtime *runtime;
2765         int err;
2766
2767 #ifdef OSS_DEBUG
2768         printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2769 #endif
2770         pcm_oss_file = file->private_data;
2771         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2772         case VM_READ | VM_WRITE:
2773                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2774                 if (substream)
2775                         break;
2776                 /* Fall through */
2777         case VM_READ:
2778                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2779                 break;
2780         case VM_WRITE:
2781                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2782                 break;
2783         default:
2784                 return -EINVAL;
2785         }
2786         /* set VM_READ access as well to fix memset() routines that do
2787            reads before writes (to improve performance) */
2788         area->vm_flags |= VM_READ;
2789         if (substream == NULL)
2790                 return -ENXIO;
2791         runtime = substream->runtime;
2792         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2793                 return -EIO;
2794         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2795                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2796         else
2797                 return -EIO;
2798
2799         if (runtime->oss.params) {
2800                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2801                         return err;
2802         }
2803 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2804         if (runtime->oss.plugin_first != NULL)
2805                 return -EIO;
2806 #endif
2807
2808         if (area->vm_pgoff != 0)
2809                 return -EINVAL;
2810
2811         err = snd_pcm_mmap_data(substream, file, area);
2812         if (err < 0)
2813                 return err;
2814         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2815         runtime->silence_threshold = 0;
2816         runtime->silence_size = 0;
2817 #ifdef OSS_DEBUG
2818         printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2819                runtime->oss.mmap_bytes);
2820 #endif
2821         /* In mmap mode we never stop */
2822         runtime->stop_threshold = runtime->boundary;
2823
2824         return 0;
2825 }
2826
2827 #ifdef CONFIG_SND_VERBOSE_PROCFS
2828 /*
2829  *  /proc interface
2830  */
2831
2832 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2833                                   struct snd_info_buffer *buffer)
2834 {
2835         struct snd_pcm_str *pstr = entry->private_data;
2836         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2837         mutex_lock(&pstr->oss.setup_mutex);
2838         while (setup) {
2839                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2840                             setup->task_name,
2841                             setup->periods,
2842                             setup->period_size,
2843                             setup->disable ? " disable" : "",
2844                             setup->direct ? " direct" : "",
2845                             setup->block ? " block" : "",
2846                             setup->nonblock ? " non-block" : "",
2847                             setup->partialfrag ? " partial-frag" : "",
2848                             setup->nosilence ? " no-silence" : "");
2849                 setup = setup->next;
2850         }
2851         mutex_unlock(&pstr->oss.setup_mutex);
2852 }
2853
2854 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2855 {
2856         struct snd_pcm_oss_setup *setup, *setupn;
2857
2858         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2859              setup; setup = setupn) {
2860                 setupn = setup->next;
2861                 kfree(setup->task_name);
2862                 kfree(setup);
2863         }
2864         pstr->oss.setup_list = NULL;
2865 }
2866
2867 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2868                                    struct snd_info_buffer *buffer)
2869 {
2870         struct snd_pcm_str *pstr = entry->private_data;
2871         char line[128], str[32], task_name[32];
2872         const char *ptr;
2873         int idx1;
2874         struct snd_pcm_oss_setup *setup, *setup1, template;
2875
2876         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2877                 mutex_lock(&pstr->oss.setup_mutex);
2878                 memset(&template, 0, sizeof(template));
2879                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2880                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2881                         snd_pcm_oss_proc_free_setup_list(pstr);
2882                         mutex_unlock(&pstr->oss.setup_mutex);
2883                         continue;
2884                 }
2885                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2886                         if (!strcmp(setup->task_name, task_name)) {
2887                                 template = *setup;
2888                                 break;
2889                         }
2890                 }
2891                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2892                 template.periods = simple_strtoul(str, NULL, 10);
2893                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2894                 template.period_size = simple_strtoul(str, NULL, 10);
2895                 for (idx1 = 31; idx1 >= 0; idx1--)
2896                         if (template.period_size & (1 << idx1))
2897                                 break;
2898                 for (idx1--; idx1 >= 0; idx1--)
2899                         template.period_size &= ~(1 << idx1);
2900                 do {
2901                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2902                         if (!strcmp(str, "disable")) {
2903                                 template.disable = 1;
2904                         } else if (!strcmp(str, "direct")) {
2905                                 template.direct = 1;
2906                         } else if (!strcmp(str, "block")) {
2907                                 template.block = 1;
2908                         } else if (!strcmp(str, "non-block")) {
2909                                 template.nonblock = 1;
2910                         } else if (!strcmp(str, "partial-frag")) {
2911                                 template.partialfrag = 1;
2912                         } else if (!strcmp(str, "no-silence")) {
2913                                 template.nosilence = 1;
2914                         } else if (!strcmp(str, "buggy-ptr")) {
2915                                 template.buggyptr = 1;
2916                         }
2917                 } while (*str);
2918                 if (setup == NULL) {
2919                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2920                         if (! setup) {
2921                                 buffer->error = -ENOMEM;
2922                                 mutex_unlock(&pstr->oss.setup_mutex);
2923                                 return;
2924                         }
2925                         if (pstr->oss.setup_list == NULL)
2926                                 pstr->oss.setup_list = setup;
2927                         else {
2928                                 for (setup1 = pstr->oss.setup_list;
2929                                      setup1->next; setup1 = setup1->next);
2930                                 setup1->next = setup;
2931                         }
2932                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2933                         if (! template.task_name) {
2934                                 kfree(setup);
2935                                 buffer->error = -ENOMEM;
2936                                 mutex_unlock(&pstr->oss.setup_mutex);
2937                                 return;
2938                         }
2939                 }
2940                 *setup = template;
2941                 mutex_unlock(&pstr->oss.setup_mutex);
2942         }
2943 }
2944
2945 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2946 {
2947         int stream;
2948         for (stream = 0; stream < 2; ++stream) {
2949                 struct snd_info_entry *entry;
2950                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2951                 if (pstr->substream_count == 0)
2952                         continue;
2953                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2954                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2955                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2956                         entry->c.text.read = snd_pcm_oss_proc_read;
2957                         entry->c.text.write = snd_pcm_oss_proc_write;
2958                         entry->private_data = pstr;
2959                         if (snd_info_register(entry) < 0) {
2960                                 snd_info_free_entry(entry);
2961                                 entry = NULL;
2962                         }
2963                 }
2964                 pstr->oss.proc_entry = entry;
2965         }
2966 }
2967
2968 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2969 {
2970         int stream;
2971         for (stream = 0; stream < 2; ++stream) {
2972                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2973                 snd_info_free_entry(pstr->oss.proc_entry);
2974                 pstr->oss.proc_entry = NULL;
2975                 snd_pcm_oss_proc_free_setup_list(pstr);
2976         }
2977 }
2978 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2979 #define snd_pcm_oss_proc_init(pcm)
2980 #define snd_pcm_oss_proc_done(pcm)
2981 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2982
2983 /*
2984  *  ENTRY functions
2985  */
2986
2987 static const struct file_operations snd_pcm_oss_f_reg =
2988 {
2989         .owner =        THIS_MODULE,
2990         .read =         snd_pcm_oss_read,
2991         .write =        snd_pcm_oss_write,
2992         .open =         snd_pcm_oss_open,
2993         .release =      snd_pcm_oss_release,
2994         .llseek =       no_llseek,
2995         .poll =         snd_pcm_oss_poll,
2996         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2997         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2998         .mmap =         snd_pcm_oss_mmap,
2999 };
3000
3001 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3002 {
3003         char name[128];
3004         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3005         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3006                                     pcm->card, index, &snd_pcm_oss_f_reg,
3007                                     pcm, name) < 0) {
3008                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3009                            pcm->card->number, pcm->device);
3010         }
3011 }
3012
3013 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3014 {
3015         pcm->oss.reg = 0;
3016         if (dsp_map[pcm->card->number] == (int)pcm->device) {
3017                 char name[128];
3018                 int duplex;
3019                 register_oss_dsp(pcm, 0);
3020                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3021                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3022                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3023                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3024 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3025                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3026                                       pcm->card->number,
3027                                       name);
3028 #endif
3029                 pcm->oss.reg++;
3030                 pcm->oss.reg_mask |= 1;
3031         }
3032         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3033                 register_oss_dsp(pcm, 1);
3034                 pcm->oss.reg++;
3035                 pcm->oss.reg_mask |= 2;
3036         }
3037
3038         if (pcm->oss.reg)
3039                 snd_pcm_oss_proc_init(pcm);
3040
3041         return 0;
3042 }
3043
3044 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3045 {
3046         if (pcm->oss.reg) {
3047                 if (pcm->oss.reg_mask & 1) {
3048                         pcm->oss.reg_mask &= ~1;
3049                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3050                                                   pcm->card, 0);
3051                 }
3052                 if (pcm->oss.reg_mask & 2) {
3053                         pcm->oss.reg_mask &= ~2;
3054                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3055                                                   pcm->card, 1);
3056                 }
3057                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3058 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3059                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3060 #endif
3061                 }
3062                 pcm->oss.reg = 0;
3063         }
3064         return 0;
3065 }
3066
3067 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3068 {
3069         snd_pcm_oss_disconnect_minor(pcm);
3070         snd_pcm_oss_proc_done(pcm);
3071         return 0;
3072 }
3073
3074 static struct snd_pcm_notify snd_pcm_oss_notify =
3075 {
3076         .n_register =   snd_pcm_oss_register_minor,
3077         .n_disconnect = snd_pcm_oss_disconnect_minor,
3078         .n_unregister = snd_pcm_oss_unregister_minor,
3079 };
3080
3081 static int __init alsa_pcm_oss_init(void)
3082 {
3083         int i;
3084         int err;
3085
3086         /* check device map table */
3087         for (i = 0; i < SNDRV_CARDS; i++) {
3088                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3089                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3090                                    i, dsp_map[i]);
3091                         dsp_map[i] = 0;
3092                 }
3093                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3094                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3095                                    i, adsp_map[i]);
3096                         adsp_map[i] = 1;
3097                 }
3098         }
3099         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3100                 return err;
3101         return 0;
3102 }
3103
3104 static void __exit alsa_pcm_oss_exit(void)
3105 {
3106         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3107 }
3108
3109 module_init(alsa_pcm_oss_init)
3110 module_exit(alsa_pcm_oss_exit)