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 <sound/driver.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/time.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/moduleparam.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
  45 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  46
  47 static int dsp_map[SNDRV_CARDS];
  48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  49 static int nonblock_open = 1;
  50
  51 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  53 MODULE_LICENSE("GPL");
  54 module_param_array(dsp_map, int, NULL, 0444);
  55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  56 module_param_array(adsp_map, int, NULL, 0444);
  57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  58 module_param(nonblock_open, bool, 0644);
  59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  62
  63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
  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                 snd_assert(max >= 0, return -EINVAL);
 457                 last = 1;
 458         }
 459  _end:
 460         kfree(save);
 461         if (last)
 462                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 463         else
 464                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 465         snd_assert(v >= 0, return -EINVAL);
 466         return v;
 467 }
 468
 469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 470                                  snd_pcm_hw_param_t var, unsigned int val,
 471                                  int dir)
 472 {
 473         int changed;
 474         if (hw_is_mask(var)) {
 475                 struct snd_mask *m = hw_param_mask(params, var);
 476                 if (val == 0 && dir < 0) {
 477                         changed = -EINVAL;
 478                         snd_mask_none(m);
 479                 } else {
 480                         if (dir > 0)
 481                                 val++;
 482                         else if (dir < 0)
 483                                 val--;
 484                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 485                 }
 486         } else if (hw_is_interval(var)) {
 487                 struct snd_interval *i = hw_param_interval(params, var);
 488                 if (val == 0 && dir < 0) {
 489                         changed = -EINVAL;
 490                         snd_interval_none(i);
 491                 } else if (dir == 0)
 492                         changed = snd_interval_refine_set(i, val);
 493                 else {
 494                         struct snd_interval t;
 495                         t.openmin = 1;
 496                         t.openmax = 1;
 497                         t.empty = 0;
 498                         t.integer = 0;
 499                         if (dir < 0) {
 500                                 t.min = val - 1;
 501                                 t.max = val;
 502                         } else {
 503                                 t.min = val;
 504                                 t.max = val+1;
 505                         }
 506                         changed = snd_interval_refine(i, &t);
 507                 }
 508         } else
 509                 return -EINVAL;
 510         if (changed) {
 511                 params->cmask |= 1 << var;
 512                 params->rmask |= 1 << var;
 513         }
 514         return changed;
 515 }
 516
 517 /**
 518  * snd_pcm_hw_param_set
 519  * @pcm: PCM instance
 520  * @params: the hw_params instance
 521  * @var: parameter to retrieve
 522  * @val: value to set
 523  * @dir: pointer to the direction (-1,0,1) or NULL
 524  *
 525  * Inside configuration space defined by PARAMS remove from PAR all
 526  * values != VAL. Reduce configuration space accordingly.
 527  *  Return VAL or -EINVAL if the configuration space is empty
 528  */
 529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 530                                 struct snd_pcm_hw_params *params,
 531                                 snd_pcm_hw_param_t var, unsigned int val,
 532                                 int dir)
 533 {
 534         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 535         if (changed < 0)
 536                 return changed;
 537         if (params->rmask) {
 538                 int err = snd_pcm_hw_refine(pcm, params);
 539                 if (err < 0)
 540                         return err;
 541         }
 542         return snd_pcm_hw_param_value(params, var, NULL);
 543 }
 544
 545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 546                                         snd_pcm_hw_param_t var)
 547 {
 548         int changed;
 549         changed = snd_interval_setinteger(hw_param_interval(params, var));
 550         if (changed) {
 551                 params->cmask |= 1 << var;
 552                 params->rmask |= 1 << var;
 553         }
 554         return changed;
 555 }
 556
 557 /*
 558  * plugin
 559  */
 560
 561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 563 {
 564         struct snd_pcm_runtime *runtime = substream->runtime;
 565         struct snd_pcm_plugin *plugin, *next;
 566
 567         plugin = runtime->oss.plugin_first;
 568         while (plugin) {
 569                 next = plugin->next;
 570                 snd_pcm_plugin_free(plugin);
 571                 plugin = next;
 572         }
 573         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 574         return 0;
 575 }
 576
 577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 578 {
 579         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 580         plugin->next = runtime->oss.plugin_first;
 581         plugin->prev = NULL;
 582         if (runtime->oss.plugin_first) {
 583                 runtime->oss.plugin_first->prev = plugin;
 584                 runtime->oss.plugin_first = plugin;
 585         } else {
 586                 runtime->oss.plugin_last =
 587                 runtime->oss.plugin_first = plugin;
 588         }
 589         return 0;
 590 }
 591
 592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 593 {
 594         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 595         plugin->next = NULL;
 596         plugin->prev = runtime->oss.plugin_last;
 597         if (runtime->oss.plugin_last) {
 598                 runtime->oss.plugin_last->next = plugin;
 599                 runtime->oss.plugin_last = plugin;
 600         } else {
 601                 runtime->oss.plugin_last =
 602                 runtime->oss.plugin_first = plugin;
 603         }
 604         return 0;
 605 }
 606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 607
 608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 609 {
 610         struct snd_pcm_runtime *runtime = substream->runtime;
 611         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 612         long bytes = frames_to_bytes(runtime, frames);
 613         if (buffer_size == runtime->oss.buffer_bytes)
 614                 return bytes;
 615 #if BITS_PER_LONG >= 64
 616         return runtime->oss.buffer_bytes * bytes / buffer_size;
 617 #else
 618         {
 619                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 620                 u32 rem;
 621                 div64_32(&bsize, buffer_size, &rem);
 622                 return (long)bsize;
 623         }
 624 #endif
 625 }
 626
 627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 628 {
 629         struct snd_pcm_runtime *runtime = substream->runtime;
 630         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 631         if (buffer_size == runtime->oss.buffer_bytes)
 632                 return bytes_to_frames(runtime, bytes);
 633         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 634 }
 635
 636 /* define extended formats in the recent OSS versions (if any) */
 637 /* linear formats */
 638 #define AFMT_S32_LE      0x00001000
 639 #define AFMT_S32_BE      0x00002000
 640 #define AFMT_S24_LE      0x00008000
 641 #define AFMT_S24_BE      0x00010000
 642 #define AFMT_S24_PACKED  0x00040000
 643
 644 /* other supported formats */
 645 #define AFMT_FLOAT       0x00004000
 646 #define AFMT_SPDIF_RAW   0x00020000
 647
 648 /* unsupported formats */
 649 #define AFMT_AC3         0x00000400
 650 #define AFMT_VORBIS      0x00000800
 651
 652 static int snd_pcm_oss_format_from(int format)
 653 {
 654         switch (format) {
 655         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 656         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 657         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 658         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 659         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 660         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 661         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 662         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 663         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 664         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 665         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 666         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 667         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 668         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 669         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 670         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 671         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 672         default:                return SNDRV_PCM_FORMAT_U8;
 673         }
 674 }
 675
 676 static int snd_pcm_oss_format_to(int format)
 677 {
 678         switch (format) {
 679         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 680         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 681         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 682         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 683         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 684         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 685         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 686         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 687         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 688         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 689         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 690         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 691         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 692         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 693         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 694         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 695         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 696         default:                        return -EINVAL;
 697         }
 698 }
 699
 700 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 701                                    struct snd_pcm_hw_params *oss_params,
 702                                    struct snd_pcm_hw_params *slave_params)
 703 {
 704         size_t s;
 705         size_t oss_buffer_size, oss_period_size, oss_periods;
 706         size_t min_period_size, max_period_size;
 707         struct snd_pcm_runtime *runtime = substream->runtime;
 708         size_t oss_frame_size;
 709
 710         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 711                          params_channels(oss_params) / 8;
 712
 713         oss_buffer_size = snd_pcm_plug_client_size(substream,
 714                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 715         oss_buffer_size = 1 << ld2(oss_buffer_size);
 716         if (atomic_read(&substream->mmap_count)) {
 717                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 718                         oss_buffer_size = runtime->oss.mmap_bytes;
 719         }
 720
 721         if (substream->oss.setup.period_size > 16)
 722                 oss_period_size = substream->oss.setup.period_size;
 723         else if (runtime->oss.fragshift) {
 724                 oss_period_size = 1 << runtime->oss.fragshift;
 725                 if (oss_period_size > oss_buffer_size / 2)
 726                         oss_period_size = oss_buffer_size / 2;
 727         } else {
 728                 int sd;
 729                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 730
 731                 oss_period_size = oss_buffer_size;
 732                 do {
 733                         oss_period_size /= 2;
 734                 } while (oss_period_size > bytes_per_sec);
 735                 if (runtime->oss.subdivision == 0) {
 736                         sd = 4;
 737                         if (oss_period_size / sd > 4096)
 738                                 sd *= 2;
 739                         if (oss_period_size / sd < 4096)
 740                                 sd = 1;
 741                 } else
 742                         sd = runtime->oss.subdivision;
 743                 oss_period_size /= sd;
 744                 if (oss_period_size < 16)
 745                         oss_period_size = 16;
 746         }
 747
 748         min_period_size = snd_pcm_plug_client_size(substream,
 749                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 750         min_period_size *= oss_frame_size;
 751         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 752         if (oss_period_size < min_period_size)
 753                 oss_period_size = min_period_size;
 754
 755         max_period_size = snd_pcm_plug_client_size(substream,
 756                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 757         max_period_size *= oss_frame_size;
 758         max_period_size = 1 << ld2(max_period_size);
 759         if (oss_period_size > max_period_size)
 760                 oss_period_size = max_period_size;
 761
 762         oss_periods = oss_buffer_size / oss_period_size;
 763
 764         if (substream->oss.setup.periods > 1)
 765                 oss_periods = substream->oss.setup.periods;
 766
 767         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 768         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 769                 s = runtime->oss.maxfrags;
 770         if (oss_periods > s)
 771                 oss_periods = s;
 772
 773         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 774         if (s < 2)
 775                 s = 2;
 776         if (oss_periods < s)
 777                 oss_periods = s;
 778
 779         while (oss_period_size * oss_periods > oss_buffer_size)
 780                 oss_period_size /= 2;
 781
 782         snd_assert(oss_period_size >= 16, return -EINVAL);
 783         runtime->oss.period_bytes = oss_period_size;
 784         runtime->oss.period_frames = 1;
 785         runtime->oss.periods = oss_periods;
 786         return 0;
 787 }
 788
 789 static int choose_rate(struct snd_pcm_substream *substream,
 790                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 791 {
 792         struct snd_interval *it;
 793         struct snd_pcm_hw_params *save;
 794         unsigned int rate, prev;
 795
 796         save = kmalloc(sizeof(*save), GFP_KERNEL);
 797         if (save == NULL)
 798                 return -ENOMEM;
 799         *save = *params;
 800         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 801
 802         /* try multiples of the best rate */
 803         rate = best_rate;
 804         for (;;) {
 805                 if (it->max < rate || (it->max == rate && it->openmax))
 806                         break;
 807                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 808                         int ret;
 809                         ret = snd_pcm_hw_param_set(substream, params,
 810                                                    SNDRV_PCM_HW_PARAM_RATE,
 811                                                    rate, 0);
 812                         if (ret == (int)rate) {
 813                                 kfree(save);
 814                                 return rate;
 815                         }
 816                         *params = *save;
 817                 }
 818                 prev = rate;
 819                 rate += best_rate;
 820                 if (rate <= prev)
 821                         break;
 822         }
 823
 824         /* not found, use the nearest rate */
 825         kfree(save);
 826         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 827 }
 828
 829 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 830 {
 831         struct snd_pcm_runtime *runtime = substream->runtime;
 832         struct snd_pcm_hw_params *params, *sparams;
 833         struct snd_pcm_sw_params *sw_params;
 834         ssize_t oss_buffer_size, oss_period_size;
 835         size_t oss_frame_size;
 836         int err;
 837         int direct;
 838         int format, sformat, n;
 839         struct snd_mask sformat_mask;
 840         struct snd_mask mask;
 841
 842         if (mutex_lock_interruptible(&runtime->oss.params_lock))
 843                 return -EINTR;
 844         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 845         params = kmalloc(sizeof(*params), GFP_KERNEL);
 846         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 847         if (!sw_params || !params || !sparams) {
 848                 snd_printd("No memory\n");
 849                 err = -ENOMEM;
 850                 goto failure;
 851         }
 852
 853         if (atomic_read(&substream->mmap_count))
 854                 direct = 1;
 855         else
 856                 direct = substream->oss.setup.direct;
 857
 858         _snd_pcm_hw_params_any(sparams);
 859         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 860         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 861         snd_mask_none(&mask);
 862         if (atomic_read(&substream->mmap_count))
 863                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 864         else {
 865                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 866                 if (!direct)
 867                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 868         }
 869         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 870         if (err < 0) {
 871                 snd_printd("No usable accesses\n");
 872                 err = -EINVAL;
 873                 goto failure;
 874         }
 875         choose_rate(substream, sparams, runtime->oss.rate);
 876         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 877
 878         format = snd_pcm_oss_format_from(runtime->oss.format);
 879
 880         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 881         if (direct)
 882                 sformat = format;
 883         else
 884                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 885
 886         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 887                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 888                         if (snd_mask_test(&sformat_mask, sformat) &&
 889                             snd_pcm_oss_format_to(sformat) >= 0)
 890                                 break;
 891                 }
 892                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 893                         snd_printd("Cannot find a format!!!\n");
 894                         err = -EINVAL;
 895                         goto failure;
 896                 }
 897         }
 898         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 899         snd_assert(err >= 0, goto failure);
 900
 901         if (direct) {
 902                 memcpy(params, sparams, sizeof(*params));
 903         } else {
 904                 _snd_pcm_hw_params_any(params);
 905                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 906                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 907                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 908                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 909                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 910                                       runtime->oss.channels, 0);
 911                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 912                                       runtime->oss.rate, 0);
 913                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 914                          params_access(params), params_format(params),
 915                          params_channels(params), params_rate(params));
 916         }
 917         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 918                  params_access(sparams), params_format(sparams),
 919                  params_channels(sparams), params_rate(sparams));
 920
 921         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 922                          params_channels(params) / 8;
 923
 924 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 925         snd_pcm_oss_plugin_clear(substream);
 926         if (!direct) {
 927                 /* add necessary plugins */
 928                 snd_pcm_oss_plugin_clear(substream);
 929                 if ((err = snd_pcm_plug_format_plugins(substream,
 930                                                        params,
 931                                                        sparams)) < 0) {
 932                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 933                         snd_pcm_oss_plugin_clear(substream);
 934                         goto failure;
 935                 }
 936                 if (runtime->oss.plugin_first) {
 937                         struct snd_pcm_plugin *plugin;
 938                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 939                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 940                                 snd_pcm_oss_plugin_clear(substream);
 941                                 goto failure;
 942                         }
 943                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 944                                 err = snd_pcm_plugin_append(plugin);
 945                         } else {
 946                                 err = snd_pcm_plugin_insert(plugin);
 947                         }
 948                         if (err < 0) {
 949                                 snd_pcm_oss_plugin_clear(substream);
 950                                 goto failure;
 951                         }
 952                 }
 953         }
 954 #endif
 955
 956         err = snd_pcm_oss_period_size(substream, params, sparams);
 957         if (err < 0)
 958                 goto failure;
 959
 960         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 961         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 962         snd_assert(err >= 0, goto failure);
 963
 964         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 965                                      runtime->oss.periods, NULL);
 966         snd_assert(err >= 0, goto failure);
 967
 968         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 969
 970         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 971                 snd_printd("HW_PARAMS failed: %i\n", err);
 972                 goto failure;
 973         }
 974
 975         memset(sw_params, 0, sizeof(*sw_params));
 976         if (runtime->oss.trigger) {
 977                 sw_params->start_threshold = 1;
 978         } else {
 979                 sw_params->start_threshold = runtime->boundary;
 980         }
 981         if (atomic_read(&substream->mmap_count) ||
 982             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 983                 sw_params->stop_threshold = runtime->boundary;
 984         else
 985                 sw_params->stop_threshold = runtime->buffer_size;
 986         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 987         sw_params->period_step = 1;
 988         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 989                 1 : runtime->period_size;
 990         if (atomic_read(&substream->mmap_count) ||
 991             substream->oss.setup.nosilence) {
 992                 sw_params->silence_threshold = 0;
 993                 sw_params->silence_size = 0;
 994         } else {
 995                 snd_pcm_uframes_t frames;
 996                 frames = runtime->period_size + 16;
 997                 if (frames > runtime->buffer_size)
 998                         frames = runtime->buffer_size;
 999                 sw_params->silence_threshold = frames;
1000                 sw_params->silence_size = frames;
1001         }
1002
1003         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1004                 snd_printd("SW_PARAMS failed: %i\n", err);
1005                 goto failure;
1006         }
1007
1008         runtime->oss.periods = params_periods(sparams);
1009         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1010         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
1011 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1012         if (runtime->oss.plugin_first) {
1013                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1014                 if (err < 0)
1015                         goto failure;
1016         }
1017 #endif
1018         oss_period_size *= oss_frame_size;
1019
1020         oss_buffer_size = oss_period_size * runtime->oss.periods;
1021         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
1022
1023         runtime->oss.period_bytes = oss_period_size;
1024         runtime->oss.buffer_bytes = oss_buffer_size;
1025
1026         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1027                  runtime->oss.period_bytes,
1028                  runtime->oss.buffer_bytes);
1029         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1030                  params_period_size(sparams),
1031                  params_buffer_size(sparams));
1032
1033         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1034         runtime->oss.channels = params_channels(params);
1035         runtime->oss.rate = params_rate(params);
1036
1037         runtime->oss.params = 0;
1038         runtime->oss.prepare = 1;
1039         vfree(runtime->oss.buffer);
1040         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1041         runtime->oss.buffer_used = 0;
1042         if (runtime->dma_area)
1043                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1044
1045         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1046
1047         err = 0;
1048 failure:
1049         kfree(sw_params);
1050         kfree(params);
1051         kfree(sparams);
1052         mutex_unlock(&runtime->oss.params_lock);
1053         return err;
1054 }
1055
1056 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1057 {
1058         int idx, err;
1059         struct snd_pcm_substream *asubstream = NULL, *substream;
1060
1061         for (idx = 0; idx < 2; idx++) {
1062                 substream = pcm_oss_file->streams[idx];
1063                 if (substream == NULL)
1064                         continue;
1065                 if (asubstream == NULL)
1066                         asubstream = substream;
1067                 if (substream->runtime->oss.params) {
1068                         err = snd_pcm_oss_change_params(substream);
1069                         if (err < 0)
1070                                 return err;
1071                 }
1072         }
1073         snd_assert(asubstream != NULL, return -EIO);
1074         if (r_substream)
1075                 *r_substream = asubstream;
1076         return 0;
1077 }
1078
1079 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1080 {
1081         int err;
1082         struct snd_pcm_runtime *runtime = substream->runtime;
1083
1084         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1085         if (err < 0) {
1086                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1087                 return err;
1088         }
1089         runtime->oss.prepare = 0;
1090         runtime->oss.prev_hw_ptr_interrupt = 0;
1091         runtime->oss.period_ptr = 0;
1092         runtime->oss.buffer_used = 0;
1093
1094         return 0;
1095 }
1096
1097 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1098 {
1099         struct snd_pcm_runtime *runtime;
1100         int err;
1101
1102         if (substream == NULL)
1103                 return 0;
1104         runtime = substream->runtime;
1105         if (runtime->oss.params) {
1106                 err = snd_pcm_oss_change_params(substream);
1107                 if (err < 0)
1108                         return err;
1109         }
1110         if (runtime->oss.prepare) {
1111                 err = snd_pcm_oss_prepare(substream);
1112                 if (err < 0)
1113                         return err;
1114         }
1115         return 0;
1116 }
1117
1118 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1119 {
1120         struct snd_pcm_runtime *runtime;
1121         snd_pcm_uframes_t frames;
1122         int err = 0;
1123
1124         while (1) {
1125                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1126                 if (err < 0)
1127                         break;
1128                 runtime = substream->runtime;
1129                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1130                         break;
1131                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1132                 /* until avail(delay) <= buffer_size */
1133                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1134                 frames /= runtime->period_size;
1135                 frames *= runtime->period_size;
1136                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1137                 if (err < 0)
1138                         break;
1139         }
1140         return err;
1141 }
1142
1143 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1144 {
1145         struct snd_pcm_runtime *runtime = substream->runtime;
1146         int ret;
1147         while (1) {
1148                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1149                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1150 #ifdef OSS_DEBUG
1151                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1152                                 printk("pcm_oss: write: recovering from XRUN\n");
1153                         else
1154                                 printk("pcm_oss: write: recovering from SUSPEND\n");
1155 #endif
1156                         ret = snd_pcm_oss_prepare(substream);
1157                         if (ret < 0)
1158                                 break;
1159                 }
1160                 if (in_kernel) {
1161                         mm_segment_t fs;
1162                         fs = snd_enter_user();
1163                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1164                         snd_leave_user(fs);
1165                 } else {
1166                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1167                 }
1168                 if (ret != -EPIPE && ret != -ESTRPIPE)
1169                         break;
1170                 /* test, if we can't store new data, because the stream */
1171                 /* has not been started */
1172                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1173                         return -EAGAIN;
1174         }
1175         return ret;
1176 }
1177
1178 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1179 {
1180         struct snd_pcm_runtime *runtime = substream->runtime;
1181         snd_pcm_sframes_t delay;
1182         int ret;
1183         while (1) {
1184                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1185                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1186 #ifdef OSS_DEBUG
1187                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1188                                 printk("pcm_oss: read: recovering from XRUN\n");
1189                         else
1190                                 printk("pcm_oss: read: recovering from SUSPEND\n");
1191 #endif
1192                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1193                         if (ret < 0)
1194                                 break;
1195                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1196                         ret = snd_pcm_oss_prepare(substream);
1197                         if (ret < 0)
1198                                 break;
1199                 }
1200                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1201                 if (ret < 0)
1202                         break;
1203                 if (in_kernel) {
1204                         mm_segment_t fs;
1205                         fs = snd_enter_user();
1206                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1207                         snd_leave_user(fs);
1208                 } else {
1209                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1210                 }
1211                 if (ret == -EPIPE) {
1212                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1213                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1214                                 if (ret < 0)
1215                                         break;
1216                         }
1217                         continue;
1218                 }
1219                 if (ret != -ESTRPIPE)
1220                         break;
1221         }
1222         return ret;
1223 }
1224
1225 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1226 {
1227         struct snd_pcm_runtime *runtime = substream->runtime;
1228         int ret;
1229         while (1) {
1230                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1231                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1232 #ifdef OSS_DEBUG
1233                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1234                                 printk("pcm_oss: writev: recovering from XRUN\n");
1235                         else
1236                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
1237 #endif
1238                         ret = snd_pcm_oss_prepare(substream);
1239                         if (ret < 0)
1240                                 break;
1241                 }
1242                 if (in_kernel) {
1243                         mm_segment_t fs;
1244                         fs = snd_enter_user();
1245                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1246                         snd_leave_user(fs);
1247                 } else {
1248                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1249                 }
1250                 if (ret != -EPIPE && ret != -ESTRPIPE)
1251                         break;
1252
1253                 /* test, if we can't store new data, because the stream */
1254                 /* has not been started */
1255                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1256                         return -EAGAIN;
1257         }
1258         return ret;
1259 }
1260
1261 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1262 {
1263         struct snd_pcm_runtime *runtime = substream->runtime;
1264         int ret;
1265         while (1) {
1266                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1267                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1268 #ifdef OSS_DEBUG
1269                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1270                                 printk("pcm_oss: readv: recovering from XRUN\n");
1271                         else
1272                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
1273 #endif
1274                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1275                         if (ret < 0)
1276                                 break;
1277                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1278                         ret = snd_pcm_oss_prepare(substream);
1279                         if (ret < 0)
1280                                 break;
1281                 }
1282                 if (in_kernel) {
1283                         mm_segment_t fs;
1284                         fs = snd_enter_user();
1285                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1286                         snd_leave_user(fs);
1287                 } else {
1288                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1289                 }
1290                 if (ret != -EPIPE && ret != -ESTRPIPE)
1291                         break;
1292         }
1293         return ret;
1294 }
1295
1296 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1297 {
1298         struct snd_pcm_runtime *runtime = substream->runtime;
1299         snd_pcm_sframes_t frames, frames1;
1300 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1301         if (runtime->oss.plugin_first) {
1302                 struct snd_pcm_plugin_channel *channels;
1303                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1304                 if (!in_kernel) {
1305                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1306                                 return -EFAULT;
1307                         buf = runtime->oss.buffer;
1308                 }
1309                 frames = bytes / oss_frame_bytes;
1310                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1311                 if (frames1 < 0)
1312                         return frames1;
1313                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1314                 if (frames1 <= 0)
1315                         return frames1;
1316                 bytes = frames1 * oss_frame_bytes;
1317         } else
1318 #endif
1319         {
1320                 frames = bytes_to_frames(runtime, bytes);
1321                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1322                 if (frames1 <= 0)
1323                         return frames1;
1324                 bytes = frames_to_bytes(runtime, frames1);
1325         }
1326         return bytes;
1327 }
1328
1329 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1330 {
1331         size_t xfer = 0;
1332         ssize_t tmp;
1333         struct snd_pcm_runtime *runtime = substream->runtime;
1334
1335         if (atomic_read(&substream->mmap_count))
1336                 return -ENXIO;
1337
1338         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1339                 return tmp;
1340         mutex_lock(&runtime->oss.params_lock);
1341         while (bytes > 0) {
1342                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1343                         tmp = bytes;
1344                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1345                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1346                         if (tmp > 0) {
1347                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1348                                         tmp = -EFAULT;
1349                                         goto err;
1350                                 }
1351                         }
1352                         runtime->oss.buffer_used += tmp;
1353                         buf += tmp;
1354                         bytes -= tmp;
1355                         xfer += tmp;
1356                         if (substream->oss.setup.partialfrag ||
1357                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1358                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1359                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1360                                 if (tmp <= 0)
1361                                         goto err;
1362                                 runtime->oss.bytes += tmp;
1363                                 runtime->oss.period_ptr += tmp;
1364                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1365                                 if (runtime->oss.period_ptr == 0 ||
1366                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1367                                         runtime->oss.buffer_used = 0;
1368                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1369                                         tmp = -EAGAIN;
1370                                         goto err;
1371                                 }
1372                         }
1373                 } else {
1374                         tmp = snd_pcm_oss_write2(substream,
1375                                                  (const char __force *)buf,
1376                                                  runtime->oss.period_bytes, 0);
1377                         if (tmp <= 0)
1378                                 goto err;
1379                         runtime->oss.bytes += tmp;
1380                         buf += tmp;
1381                         bytes -= tmp;
1382                         xfer += tmp;
1383                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1384                             tmp != runtime->oss.period_bytes)
1385                                 break;
1386                 }
1387         }
1388         mutex_unlock(&runtime->oss.params_lock);
1389         return xfer;
1390
1391  err:
1392         mutex_unlock(&runtime->oss.params_lock);
1393         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1394 }
1395
1396 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1397 {
1398         struct snd_pcm_runtime *runtime = substream->runtime;
1399         snd_pcm_sframes_t frames, frames1;
1400 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1401         char __user *final_dst = (char __user *)buf;
1402         if (runtime->oss.plugin_first) {
1403                 struct snd_pcm_plugin_channel *channels;
1404                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1405                 if (!in_kernel)
1406                         buf = runtime->oss.buffer;
1407                 frames = bytes / oss_frame_bytes;
1408                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1409                 if (frames1 < 0)
1410                         return frames1;
1411                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1412                 if (frames1 <= 0)
1413                         return frames1;
1414                 bytes = frames1 * oss_frame_bytes;
1415                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1416                         return -EFAULT;
1417         } else
1418 #endif
1419         {
1420                 frames = bytes_to_frames(runtime, bytes);
1421                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1422                 if (frames1 <= 0)
1423                         return frames1;
1424                 bytes = frames_to_bytes(runtime, frames1);
1425         }
1426         return bytes;
1427 }
1428
1429 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1430 {
1431         size_t xfer = 0;
1432         ssize_t tmp;
1433         struct snd_pcm_runtime *runtime = substream->runtime;
1434
1435         if (atomic_read(&substream->mmap_count))
1436                 return -ENXIO;
1437
1438         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1439                 return tmp;
1440         mutex_lock(&runtime->oss.params_lock);
1441         while (bytes > 0) {
1442                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1443                         if (runtime->oss.buffer_used == 0) {
1444                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1445                                 if (tmp <= 0)
1446                                         goto err;
1447                                 runtime->oss.bytes += tmp;
1448                                 runtime->oss.period_ptr = tmp;
1449                                 runtime->oss.buffer_used = tmp;
1450                         }
1451                         tmp = bytes;
1452                         if ((size_t) tmp > runtime->oss.buffer_used)
1453                                 tmp = runtime->oss.buffer_used;
1454                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1455                                 tmp = -EFAULT;
1456                                 goto err;
1457                         }
1458                         buf += tmp;
1459                         bytes -= tmp;
1460                         xfer += tmp;
1461                         runtime->oss.buffer_used -= tmp;
1462                 } else {
1463                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1464                                                 runtime->oss.period_bytes, 0);
1465                         if (tmp <= 0)
1466                                 goto err;
1467                         runtime->oss.bytes += tmp;
1468                         buf += tmp;
1469                         bytes -= tmp;
1470                         xfer += tmp;
1471                 }
1472         }
1473         mutex_unlock(&runtime->oss.params_lock);
1474         return xfer;
1475
1476  err:
1477         mutex_unlock(&runtime->oss.params_lock);
1478         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1479 }
1480
1481 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1482 {
1483         struct snd_pcm_substream *substream;
1484
1485         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1486         if (substream != NULL) {
1487                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1488                 substream->runtime->oss.prepare = 1;
1489         }
1490         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1491         if (substream != NULL) {
1492                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1493                 substream->runtime->oss.prepare = 1;
1494         }
1495         return 0;
1496 }
1497
1498 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1499 {
1500         struct snd_pcm_substream *substream;
1501         int err;
1502
1503         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1504         if (substream != NULL) {
1505                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1506                         return err;
1507                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1508         }
1509         /* note: all errors from the start action are ignored */
1510         /* OSS apps do not know, how to handle them */
1511         return 0;
1512 }
1513
1514 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1515 {
1516         struct snd_pcm_runtime *runtime;
1517         ssize_t result = 0;
1518         long res;
1519         wait_queue_t wait;
1520
1521         runtime = substream->runtime;
1522         init_waitqueue_entry(&wait, current);
1523         add_wait_queue(&runtime->sleep, &wait);
1524 #ifdef OSS_DEBUG
1525         printk("sync1: size = %li\n", size);
1526 #endif
1527         while (1) {
1528                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1529                 if (result > 0) {
1530                         runtime->oss.buffer_used = 0;
1531                         result = 0;
1532                         break;
1533                 }
1534                 if (result != 0 && result != -EAGAIN)
1535                         break;
1536                 result = 0;
1537                 set_current_state(TASK_INTERRUPTIBLE);
1538                 snd_pcm_stream_lock_irq(substream);
1539                 res = runtime->status->state;
1540                 snd_pcm_stream_unlock_irq(substream);
1541                 if (res != SNDRV_PCM_STATE_RUNNING) {
1542                         set_current_state(TASK_RUNNING);
1543                         break;
1544                 }
1545                 res = schedule_timeout(10 * HZ);
1546                 if (signal_pending(current)) {
1547                         result = -ERESTARTSYS;
1548                         break;
1549                 }
1550                 if (res == 0) {
1551                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1552                         result = -EIO;
1553                         break;
1554                 }
1555         }
1556         remove_wait_queue(&runtime->sleep, &wait);
1557         return result;
1558 }
1559
1560 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1561 {
1562         int err = 0;
1563         unsigned int saved_f_flags;
1564         struct snd_pcm_substream *substream;
1565         struct snd_pcm_runtime *runtime;
1566         snd_pcm_format_t format;
1567         unsigned long width;
1568         size_t size;
1569
1570         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1571         if (substream != NULL) {
1572                 runtime = substream->runtime;
1573                 if (atomic_read(&substream->mmap_count))
1574                         goto __direct;
1575                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1576                         return err;
1577                 format = snd_pcm_oss_format_from(runtime->oss.format);
1578                 width = snd_pcm_format_physical_width(format);
1579                 mutex_lock(&runtime->oss.params_lock);
1580                 if (runtime->oss.buffer_used > 0) {
1581 #ifdef OSS_DEBUG
1582                         printk("sync: buffer_used\n");
1583 #endif
1584                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1585                         snd_pcm_format_set_silence(format,
1586                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1587                                                    size);
1588                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1589                         if (err < 0) {
1590                                 mutex_unlock(&runtime->oss.params_lock);
1591                                 return err;
1592                         }
1593                 } else if (runtime->oss.period_ptr > 0) {
1594 #ifdef OSS_DEBUG
1595                         printk("sync: period_ptr\n");
1596 #endif
1597                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1598                         snd_pcm_format_set_silence(format,
1599                                                    runtime->oss.buffer,
1600                                                    size * 8 / width);
1601                         err = snd_pcm_oss_sync1(substream, size);
1602                         if (err < 0) {
1603                                 mutex_unlock(&runtime->oss.params_lock);
1604                                 return err;
1605                         }
1606                 }
1607                 /*
1608                  * The ALSA's period might be a bit large than OSS one.
1609                  * Fill the remain portion of ALSA period with zeros.
1610                  */
1611                 size = runtime->control->appl_ptr % runtime->period_size;
1612                 if (size > 0) {
1613                         size = runtime->period_size - size;
1614                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1615                                 size = (runtime->frame_bits * size) / 8;
1616                                 while (size > 0) {
1617                                         mm_segment_t fs;
1618                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1619                                         size -= size1;
1620                                         size1 *= 8;
1621                                         size1 /= runtime->sample_bits;
1622                                         snd_pcm_format_set_silence(runtime->format,
1623                                                                    runtime->oss.buffer,
1624                                                                    size1);
1625                                         fs = snd_enter_user();
1626                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1627                                         snd_leave_user(fs);
1628                                 }
1629                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1630                                 void __user *buffers[runtime->channels];
1631                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1632                                 snd_pcm_lib_writev(substream, buffers, size);
1633                         }
1634                 }
1635                 mutex_unlock(&runtime->oss.params_lock);
1636                 /*
1637                  * finish sync: drain the buffer
1638                  */
1639               __direct:
1640                 saved_f_flags = substream->f_flags;
1641                 substream->f_flags &= ~O_NONBLOCK;
1642                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1643                 substream->f_flags = saved_f_flags;
1644                 if (err < 0)
1645                         return err;
1646                 runtime->oss.prepare = 1;
1647         }
1648
1649         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1650         if (substream != NULL) {
1651                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1652                         return err;
1653                 runtime = substream->runtime;
1654                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1655                 if (err < 0)
1656                         return err;
1657                 runtime->oss.buffer_used = 0;
1658                 runtime->oss.prepare = 1;
1659         }
1660         return 0;
1661 }
1662
1663 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1664 {
1665         int idx;
1666
1667         for (idx = 1; idx >= 0; --idx) {
1668                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1669                 struct snd_pcm_runtime *runtime;
1670                 if (substream == NULL)
1671                         continue;
1672                 runtime = substream->runtime;
1673                 if (rate < 1000)
1674                         rate = 1000;
1675                 else if (rate > 192000)
1676                         rate = 192000;
1677                 if (runtime->oss.rate != rate) {
1678                         runtime->oss.params = 1;
1679                         runtime->oss.rate = rate;
1680                 }
1681         }
1682         return snd_pcm_oss_get_rate(pcm_oss_file);
1683 }
1684
1685 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1686 {
1687         struct snd_pcm_substream *substream;
1688         int err;
1689
1690         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1691                 return err;
1692         return substream->runtime->oss.rate;
1693 }
1694
1695 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1696 {
1697         int idx;
1698         if (channels < 1)
1699                 channels = 1;
1700         if (channels > 128)
1701                 return -EINVAL;
1702         for (idx = 1; idx >= 0; --idx) {
1703                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704                 struct snd_pcm_runtime *runtime;
1705                 if (substream == NULL)
1706                         continue;
1707                 runtime = substream->runtime;
1708                 if (runtime->oss.channels != channels) {
1709                         runtime->oss.params = 1;
1710                         runtime->oss.channels = channels;
1711                 }
1712         }
1713         return snd_pcm_oss_get_channels(pcm_oss_file);
1714 }
1715
1716 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1717 {
1718         struct snd_pcm_substream *substream;
1719         int err;
1720
1721         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1722                 return err;
1723         return substream->runtime->oss.channels;
1724 }
1725
1726 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1727 {
1728         struct snd_pcm_substream *substream;
1729         int err;
1730
1731         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1732                 return err;
1733         return substream->runtime->oss.period_bytes;
1734 }
1735
1736 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1737 {
1738         struct snd_pcm_substream *substream;
1739         int err;
1740         int direct;
1741         struct snd_pcm_hw_params *params;
1742         unsigned int formats = 0;
1743         struct snd_mask format_mask;
1744         int fmt;
1745
1746         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1747                 return err;
1748         if (atomic_read(&substream->mmap_count))
1749                 direct = 1;
1750         else
1751                 direct = substream->oss.setup.direct;
1752         if (!direct)
1753                 return AFMT_MU_LAW | AFMT_U8 |
1754                        AFMT_S16_LE | AFMT_S16_BE |
1755                        AFMT_S8 | AFMT_U16_LE |
1756                        AFMT_U16_BE |
1757                         AFMT_S32_LE | AFMT_S32_BE |
1758                         AFMT_S24_LE | AFMT_S24_LE |
1759                         AFMT_S24_PACKED;
1760         params = kmalloc(sizeof(*params), GFP_KERNEL);
1761         if (!params)
1762                 return -ENOMEM;
1763         _snd_pcm_hw_params_any(params);
1764         err = snd_pcm_hw_refine(substream, params);
1765         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1766         kfree(params);
1767         snd_assert(err >= 0, return err);
1768         for (fmt = 0; fmt < 32; ++fmt) {
1769                 if (snd_mask_test(&format_mask, fmt)) {
1770                         int f = snd_pcm_oss_format_to(fmt);
1771                         if (f >= 0)
1772                                 formats |= f;
1773                 }
1774         }
1775         return formats;
1776 }
1777
1778 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1779 {
1780         int formats, idx;
1781
1782         if (format != AFMT_QUERY) {
1783                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1784                 if (formats < 0)
1785                         return formats;
1786                 if (!(formats & format))
1787                         format = AFMT_U8;
1788                 for (idx = 1; idx >= 0; --idx) {
1789                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1790                         struct snd_pcm_runtime *runtime;
1791                         if (substream == NULL)
1792                                 continue;
1793                         runtime = substream->runtime;
1794                         if (runtime->oss.format != format) {
1795                                 runtime->oss.params = 1;
1796                                 runtime->oss.format = format;
1797                         }
1798                 }
1799         }
1800         return snd_pcm_oss_get_format(pcm_oss_file);
1801 }
1802
1803 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1804 {
1805         struct snd_pcm_substream *substream;
1806         int err;
1807
1808         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1809                 return err;
1810         return substream->runtime->oss.format;
1811 }
1812
1813 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1814 {
1815         struct snd_pcm_runtime *runtime;
1816
1817         if (substream == NULL)
1818                 return 0;
1819         runtime = substream->runtime;
1820         if (subdivide == 0) {
1821                 subdivide = runtime->oss.subdivision;
1822                 if (subdivide == 0)
1823                         subdivide = 1;
1824                 return subdivide;
1825         }
1826         if (runtime->oss.subdivision || runtime->oss.fragshift)
1827                 return -EINVAL;
1828         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1829             subdivide != 8 && subdivide != 16)
1830                 return -EINVAL;
1831         runtime->oss.subdivision = subdivide;
1832         runtime->oss.params = 1;
1833         return subdivide;
1834 }
1835
1836 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1837 {
1838         int err = -EINVAL, idx;
1839
1840         for (idx = 1; idx >= 0; --idx) {
1841                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1842                 if (substream == NULL)
1843                         continue;
1844                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1845                         return err;
1846         }
1847         return err;
1848 }
1849
1850 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1851 {
1852         struct snd_pcm_runtime *runtime;
1853
1854         if (substream == NULL)
1855                 return 0;
1856         runtime = substream->runtime;
1857         if (runtime->oss.subdivision || runtime->oss.fragshift)
1858                 return -EINVAL;
1859         runtime->oss.fragshift = val & 0xffff;
1860         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1861         if (runtime->oss.fragshift < 4)         /* < 16 */
1862                 runtime->oss.fragshift = 4;
1863         if (runtime->oss.maxfrags < 2)
1864                 runtime->oss.maxfrags = 2;
1865         runtime->oss.params = 1;
1866         return 0;
1867 }
1868
1869 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1870 {
1871         int err = -EINVAL, idx;
1872
1873         for (idx = 1; idx >= 0; --idx) {
1874                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1875                 if (substream == NULL)
1876                         continue;
1877                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1878                         return err;
1879         }
1880         return err;
1881 }
1882
1883 static int snd_pcm_oss_nonblock(struct file * file)
1884 {
1885         file->f_flags |= O_NONBLOCK;
1886         return 0;
1887 }
1888
1889 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1890 {
1891
1892         if (substream == NULL) {
1893                 res &= ~DSP_CAP_DUPLEX;
1894                 return res;
1895         }
1896 #ifdef DSP_CAP_MULTI
1897         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1898                 if (substream->pstr->substream_count > 1)
1899                         res |= DSP_CAP_MULTI;
1900 #endif
1901         /* DSP_CAP_REALTIME is set all times: */
1902         /* all ALSA drivers can return actual pointer in ring buffer */
1903 #if defined(DSP_CAP_REALTIME) && 0
1904         {
1905                 struct snd_pcm_runtime *runtime = substream->runtime;
1906                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1907                         res &= ~DSP_CAP_REALTIME;
1908         }
1909 #endif
1910         return res;
1911 }
1912
1913 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1914 {
1915         int result, idx;
1916
1917         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1918         for (idx = 0; idx < 2; idx++) {
1919                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1920                 result = snd_pcm_oss_get_caps1(substream, result);
1921         }
1922         result |= 0x0001;       /* revision - same as SB AWE 64 */
1923         return result;
1924 }
1925
1926 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1927 {
1928         struct snd_pcm_runtime *runtime = substream->runtime;
1929         snd_pcm_uframes_t appl_ptr;
1930         appl_ptr = hw_ptr + runtime->buffer_size;
1931         appl_ptr %= runtime->boundary;
1932         runtime->control->appl_ptr = appl_ptr;
1933 }
1934
1935 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1936 {
1937         struct snd_pcm_runtime *runtime;
1938         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1939         int err, cmd;
1940
1941 #ifdef OSS_DEBUG
1942         printk("pcm_oss: trigger = 0x%x\n", trigger);
1943 #endif
1944
1945         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1946         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1947
1948         if (psubstream) {
1949                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1950                         return err;
1951         }
1952         if (csubstream) {
1953                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1954                         return err;
1955         }
1956         if (psubstream) {
1957                 runtime = psubstream->runtime;
1958                 if (trigger & PCM_ENABLE_OUTPUT) {
1959                         if (runtime->oss.trigger)
1960                                 goto _skip1;
1961                         if (atomic_read(&psubstream->mmap_count))
1962                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1963                         runtime->oss.trigger = 1;
1964                         runtime->start_threshold = 1;
1965                         cmd = SNDRV_PCM_IOCTL_START;
1966                 } else {
1967                         if (!runtime->oss.trigger)
1968                                 goto _skip1;
1969                         runtime->oss.trigger = 0;
1970                         runtime->start_threshold = runtime->boundary;
1971                         cmd = SNDRV_PCM_IOCTL_DROP;
1972                         runtime->oss.prepare = 1;
1973                 }
1974                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1975                 if (err < 0)
1976                         return err;
1977         }
1978  _skip1:
1979         if (csubstream) {
1980                 runtime = csubstream->runtime;
1981                 if (trigger & PCM_ENABLE_INPUT) {
1982                         if (runtime->oss.trigger)
1983                                 goto _skip2;
1984                         runtime->oss.trigger = 1;
1985                         runtime->start_threshold = 1;
1986                         cmd = SNDRV_PCM_IOCTL_START;
1987                 } else {
1988                         if (!runtime->oss.trigger)
1989                                 goto _skip2;
1990                         runtime->oss.trigger = 0;
1991                         runtime->start_threshold = runtime->boundary;
1992                         cmd = SNDRV_PCM_IOCTL_DROP;
1993                         runtime->oss.prepare = 1;
1994                 }
1995                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1996                 if (err < 0)
1997                         return err;
1998         }
1999  _skip2:
2000         return 0;
2001 }
2002
2003 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2004 {
2005         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2006         int result = 0;
2007
2008         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2009         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2010         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2011                 result |= PCM_ENABLE_OUTPUT;
2012         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2013                 result |= PCM_ENABLE_INPUT;
2014         return result;
2015 }
2016
2017 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2018 {
2019         struct snd_pcm_substream *substream;
2020         struct snd_pcm_runtime *runtime;
2021         snd_pcm_sframes_t delay;
2022         int err;
2023
2024         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2025         if (substream == NULL)
2026                 return -EINVAL;
2027         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2028                 return err;
2029         runtime = substream->runtime;
2030         if (runtime->oss.params || runtime->oss.prepare)
2031                 return 0;
2032         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2033         if (err == -EPIPE)
2034                 delay = 0;      /* hack for broken OSS applications */
2035         else if (err < 0)
2036                 return err;
2037         return snd_pcm_oss_bytes(substream, delay);
2038 }
2039
2040 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2041 {
2042         struct snd_pcm_substream *substream;
2043         struct snd_pcm_runtime *runtime;
2044         snd_pcm_sframes_t delay;
2045         int fixup;
2046         struct count_info info;
2047         int err;
2048
2049         if (_info == NULL)
2050                 return -EFAULT;
2051         substream = pcm_oss_file->streams[stream];
2052         if (substream == NULL)
2053                 return -EINVAL;
2054         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2055                 return err;
2056         runtime = substream->runtime;
2057         if (runtime->oss.params || runtime->oss.prepare) {
2058                 memset(&info, 0, sizeof(info));
2059                 if (copy_to_user(_info, &info, sizeof(info)))
2060                         return -EFAULT;
2061                 return 0;
2062         }
2063         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2064                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2065                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2066                         err = 0;
2067                         delay = 0;
2068                         fixup = 0;
2069                 } else {
2070                         fixup = runtime->oss.buffer_used;
2071                 }
2072         } else {
2073                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2074                 fixup = -runtime->oss.buffer_used;
2075         }
2076         if (err < 0)
2077                 return err;
2078         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2079         if (atomic_read(&substream->mmap_count)) {
2080                 snd_pcm_sframes_t n;
2081                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2082                 if (n < 0)
2083                         n += runtime->boundary;
2084                 info.blocks = n / runtime->period_size;
2085                 runtime->oss.prev_hw_ptr_interrupt = delay;
2086                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2087                         snd_pcm_oss_simulate_fill(substream, delay);
2088                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2089         } else {
2090                 delay = snd_pcm_oss_bytes(substream, delay);
2091                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2092                         if (substream->oss.setup.buggyptr)
2093                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2094                         else
2095                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2096                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2097                 } else {
2098                         delay += fixup;
2099                         info.blocks = delay / runtime->oss.period_bytes;
2100                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2101                 }
2102         }
2103         if (copy_to_user(_info, &info, sizeof(info)))
2104                 return -EFAULT;
2105         return 0;
2106 }
2107
2108 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2109 {
2110         struct snd_pcm_substream *substream;
2111         struct snd_pcm_runtime *runtime;
2112         snd_pcm_sframes_t avail;
2113         int fixup;
2114         struct audio_buf_info info;
2115         int err;
2116
2117         if (_info == NULL)
2118                 return -EFAULT;
2119         substream = pcm_oss_file->streams[stream];
2120         if (substream == NULL)
2121                 return -EINVAL;
2122         runtime = substream->runtime;
2123
2124         if (runtime->oss.params &&
2125             (err = snd_pcm_oss_change_params(substream)) < 0)
2126                 return err;
2127
2128         info.fragsize = runtime->oss.period_bytes;
2129         info.fragstotal = runtime->periods;
2130         if (runtime->oss.prepare) {
2131                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2132                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2133                         info.fragments = runtime->oss.periods;
2134                 } else {
2135                         info.bytes = 0;
2136                         info.fragments = 0;
2137                 }
2138         } else {
2139                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2140                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2141                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2142                                 avail = runtime->buffer_size;
2143                                 err = 0;
2144                                 fixup = 0;
2145                         } else {
2146                                 avail = runtime->buffer_size - avail;
2147                                 fixup = -runtime->oss.buffer_used;
2148                         }
2149                 } else {
2150                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2151                         fixup = runtime->oss.buffer_used;
2152                 }
2153                 if (err < 0)
2154                         return err;
2155                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2156                 info.fragments = info.bytes / runtime->oss.period_bytes;
2157         }
2158
2159 #ifdef OSS_DEBUG
2160         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2161 #endif
2162         if (copy_to_user(_info, &info, sizeof(info)))
2163                 return -EFAULT;
2164         return 0;
2165 }
2166
2167 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2168 {
2169         // it won't be probably implemented
2170         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2171         return -EINVAL;
2172 }
2173
2174 static const char *strip_task_path(const char *path)
2175 {
2176         const char *ptr, *ptrl = NULL;
2177         for (ptr = path; *ptr; ptr++) {
2178                 if (*ptr == '/')
2179                         ptrl = ptr + 1;
2180         }
2181         return ptrl;
2182 }
2183
2184 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2185                                       const char *task_name,
2186                                       struct snd_pcm_oss_setup *rsetup)
2187 {
2188         struct snd_pcm_oss_setup *setup;
2189
2190         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2191         do {
2192                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2193                      setup = setup->next) {
2194                         if (!strcmp(setup->task_name, task_name))
2195                                 goto out;
2196                 }
2197         } while ((task_name = strip_task_path(task_name)) != NULL);
2198  out:
2199         if (setup)
2200                 *rsetup = *setup;
2201         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2202 }
2203
2204 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2205 {
2206         struct snd_pcm_runtime *runtime;
2207         runtime = substream->runtime;
2208         vfree(runtime->oss.buffer);
2209         runtime->oss.buffer = NULL;
2210 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2211         snd_pcm_oss_plugin_clear(substream);
2212 #endif
2213         substream->oss.oss = 0;
2214 }
2215
2216 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2217                                        struct snd_pcm_oss_setup *setup,
2218                                        int minor)
2219 {
2220         struct snd_pcm_runtime *runtime;
2221
2222         substream->oss.oss = 1;
2223         substream->oss.setup = *setup;
2224         if (setup->nonblock)
2225                 substream->f_flags |= O_NONBLOCK;
2226         else if (setup->block)
2227                 substream->f_flags &= ~O_NONBLOCK;
2228         runtime = substream->runtime;
2229         runtime->oss.params = 1;
2230         runtime->oss.trigger = 1;
2231         runtime->oss.rate = 8000;
2232         mutex_init(&runtime->oss.params_lock);
2233         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2234         case SNDRV_MINOR_OSS_PCM_8:
2235                 runtime->oss.format = AFMT_U8;
2236                 break;
2237         case SNDRV_MINOR_OSS_PCM_16:
2238                 runtime->oss.format = AFMT_S16_LE;
2239                 break;
2240         default:
2241                 runtime->oss.format = AFMT_MU_LAW;
2242         }
2243         runtime->oss.channels = 1;
2244         runtime->oss.fragshift = 0;
2245         runtime->oss.maxfrags = 0;
2246         runtime->oss.subdivision = 0;
2247         substream->pcm_release = snd_pcm_oss_release_substream;
2248 }
2249
2250 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2251 {
2252         int cidx;
2253         snd_assert(pcm_oss_file != NULL, return -ENXIO);
2254         for (cidx = 0; cidx < 2; ++cidx) {
2255                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2256                 if (substream)
2257                         snd_pcm_release_substream(substream);
2258         }
2259         kfree(pcm_oss_file);
2260         return 0;
2261 }
2262
2263 static int snd_pcm_oss_open_file(struct file *file,
2264                                  struct snd_pcm *pcm,
2265                                  struct snd_pcm_oss_file **rpcm_oss_file,
2266                                  int minor,
2267                                  struct snd_pcm_oss_setup *setup)
2268 {
2269         int idx, err;
2270         struct snd_pcm_oss_file *pcm_oss_file;
2271         struct snd_pcm_substream *substream;
2272         unsigned int f_mode = file->f_mode;
2273
2274         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2275         *rpcm_oss_file = NULL;
2276
2277         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2278         if (pcm_oss_file == NULL)
2279                 return -ENOMEM;
2280
2281         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2282             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2283                 f_mode = FMODE_WRITE;
2284
2285         file->f_flags &= ~O_APPEND;
2286         for (idx = 0; idx < 2; idx++) {
2287                 if (setup[idx].disable)
2288                         continue;
2289                 if (! pcm->streams[idx].substream_count)
2290                         continue; /* no matching substream */
2291                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2292                         if (! (f_mode & FMODE_WRITE))
2293                                 continue;
2294                 } else {
2295                         if (! (f_mode & FMODE_READ))
2296                                 continue;
2297                 }
2298                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2299                 if (err < 0) {
2300                         snd_pcm_oss_release_file(pcm_oss_file);
2301                         return err;
2302                 }
2303
2304                 pcm_oss_file->streams[idx] = substream;
2305                 substream->file = pcm_oss_file;
2306                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2307         }
2308
2309         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2310                 snd_pcm_oss_release_file(pcm_oss_file);
2311                 return -EINVAL;
2312         }
2313
2314         file->private_data = pcm_oss_file;
2315         *rpcm_oss_file = pcm_oss_file;
2316         return 0;
2317 }
2318
2319
2320 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2321 {
2322         unsigned int idx;
2323
2324         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2325         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2326                 name[idx] = task->comm[idx];
2327         name[idx] = '\0';
2328         return 0;
2329 }
2330
2331 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2332 {
2333         int err;
2334         char task_name[32];
2335         struct snd_pcm *pcm;
2336         struct snd_pcm_oss_file *pcm_oss_file;
2337         struct snd_pcm_oss_setup setup[2];
2338         int nonblock;
2339         wait_queue_t wait;
2340
2341         pcm = snd_lookup_oss_minor_data(iminor(inode),
2342                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2343         if (pcm == NULL) {
2344                 err = -ENODEV;
2345                 goto __error1;
2346         }
2347         err = snd_card_file_add(pcm->card, file);
2348         if (err < 0)
2349                 goto __error1;
2350         if (!try_module_get(pcm->card->module)) {
2351                 err = -EFAULT;
2352                 goto __error2;
2353         }
2354         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2355                 err = -EFAULT;
2356                 goto __error;
2357         }
2358         memset(setup, 0, sizeof(setup));
2359         if (file->f_mode & FMODE_WRITE)
2360                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2361                                            task_name, &setup[0]);
2362         if (file->f_mode & FMODE_READ)
2363                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2364                                            task_name, &setup[1]);
2365
2366         nonblock = !!(file->f_flags & O_NONBLOCK);
2367         if (!nonblock)
2368                 nonblock = nonblock_open;
2369
2370         init_waitqueue_entry(&wait, current);
2371         add_wait_queue(&pcm->open_wait, &wait);
2372         mutex_lock(&pcm->open_mutex);
2373         while (1) {
2374                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2375                                             iminor(inode), setup);
2376                 if (err >= 0)
2377                         break;
2378                 if (err == -EAGAIN) {
2379                         if (nonblock) {
2380                                 err = -EBUSY;
2381                                 break;
2382                         }
2383                 } else
2384                         break;
2385                 set_current_state(TASK_INTERRUPTIBLE);
2386                 mutex_unlock(&pcm->open_mutex);
2387                 schedule();
2388                 mutex_lock(&pcm->open_mutex);
2389                 if (signal_pending(current)) {
2390                         err = -ERESTARTSYS;
2391                         break;
2392                 }
2393         }
2394         remove_wait_queue(&pcm->open_wait, &wait);
2395         mutex_unlock(&pcm->open_mutex);
2396         if (err < 0)
2397                 goto __error;
2398         return err;
2399
2400       __error:
2401         module_put(pcm->card->module);
2402       __error2:
2403         snd_card_file_remove(pcm->card, file);
2404       __error1:
2405         return err;
2406 }
2407
2408 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2409 {
2410         struct snd_pcm *pcm;
2411         struct snd_pcm_substream *substream;
2412         struct snd_pcm_oss_file *pcm_oss_file;
2413
2414         pcm_oss_file = file->private_data;
2415         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2416         if (substream == NULL)
2417                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2418         snd_assert(substream != NULL, return -ENXIO);
2419         pcm = substream->pcm;
2420         if (!pcm->card->shutdown)
2421                 snd_pcm_oss_sync(pcm_oss_file);
2422         mutex_lock(&pcm->open_mutex);
2423         snd_pcm_oss_release_file(pcm_oss_file);
2424         mutex_unlock(&pcm->open_mutex);
2425         wake_up(&pcm->open_wait);
2426         module_put(pcm->card->module);
2427         snd_card_file_remove(pcm->card, file);
2428         return 0;
2429 }
2430
2431 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2432 {
2433         struct snd_pcm_oss_file *pcm_oss_file;
2434         int __user *p = (int __user *)arg;
2435         int res;
2436
2437         pcm_oss_file = file->private_data;
2438         if (cmd == OSS_GETVERSION)
2439                 return put_user(SNDRV_OSS_VERSION, p);
2440         if (cmd == OSS_ALSAEMULVER)
2441                 return put_user(1, p);
2442 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2443         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2444                 struct snd_pcm_substream *substream;
2445                 int idx;
2446                 for (idx = 0; idx < 2; ++idx) {
2447                         substream = pcm_oss_file->streams[idx];
2448                         if (substream != NULL)
2449                                 break;
2450                 }
2451                 snd_assert(substream != NULL, return -ENXIO);
2452                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2453         }
2454 #endif
2455         if (((cmd >> 8) & 0xff) != 'P')
2456                 return -EINVAL;
2457 #ifdef OSS_DEBUG
2458         printk("pcm_oss: ioctl = 0x%x\n", cmd);
2459 #endif
2460         switch (cmd) {
2461         case SNDCTL_DSP_RESET:
2462                 return snd_pcm_oss_reset(pcm_oss_file);
2463         case SNDCTL_DSP_SYNC:
2464                 return snd_pcm_oss_sync(pcm_oss_file);
2465         case SNDCTL_DSP_SPEED:
2466                 if (get_user(res, p))
2467                         return -EFAULT;
2468                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2469                         return res;
2470                 return put_user(res, p);
2471         case SOUND_PCM_READ_RATE:
2472                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2473                 if (res < 0)
2474                         return res;
2475                 return put_user(res, p);
2476         case SNDCTL_DSP_STEREO:
2477                 if (get_user(res, p))
2478                         return -EFAULT;
2479                 res = res > 0 ? 2 : 1;
2480                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2481                         return res;
2482                 return put_user(--res, p);
2483         case SNDCTL_DSP_GETBLKSIZE:
2484                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2485                 if (res < 0)
2486                         return res;
2487                 return put_user(res, p);
2488         case SNDCTL_DSP_SETFMT:
2489                 if (get_user(res, p))
2490                         return -EFAULT;
2491                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2492                 if (res < 0)
2493                         return res;
2494                 return put_user(res, p);
2495         case SOUND_PCM_READ_BITS:
2496                 res = snd_pcm_oss_get_format(pcm_oss_file);
2497                 if (res < 0)
2498                         return res;
2499                 return put_user(res, p);
2500         case SNDCTL_DSP_CHANNELS:
2501                 if (get_user(res, p))
2502                         return -EFAULT;
2503                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2504                 if (res < 0)
2505                         return res;
2506                 return put_user(res, p);
2507         case SOUND_PCM_READ_CHANNELS:
2508                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2509                 if (res < 0)
2510                         return res;
2511                 return put_user(res, p);
2512         case SOUND_PCM_WRITE_FILTER:
2513         case SOUND_PCM_READ_FILTER:
2514                 return -EIO;
2515         case SNDCTL_DSP_POST:
2516                 return snd_pcm_oss_post(pcm_oss_file);
2517         case SNDCTL_DSP_SUBDIVIDE:
2518                 if (get_user(res, p))
2519                         return -EFAULT;
2520                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2521                 if (res < 0)
2522                         return res;
2523                 return put_user(res, p);
2524         case SNDCTL_DSP_SETFRAGMENT:
2525                 if (get_user(res, p))
2526                         return -EFAULT;
2527                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2528         case SNDCTL_DSP_GETFMTS:
2529                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2530                 if (res < 0)
2531                         return res;
2532                 return put_user(res, p);
2533         case SNDCTL_DSP_GETOSPACE:
2534         case SNDCTL_DSP_GETISPACE:
2535                 return snd_pcm_oss_get_space(pcm_oss_file,
2536                         cmd == SNDCTL_DSP_GETISPACE ?
2537                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2538                         (struct audio_buf_info __user *) arg);
2539         case SNDCTL_DSP_NONBLOCK:
2540                 return snd_pcm_oss_nonblock(file);
2541         case SNDCTL_DSP_GETCAPS:
2542                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2543                 if (res < 0)
2544                         return res;
2545                 return put_user(res, p);
2546         case SNDCTL_DSP_GETTRIGGER:
2547                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2548                 if (res < 0)
2549                         return res;
2550                 return put_user(res, p);
2551         case SNDCTL_DSP_SETTRIGGER:
2552                 if (get_user(res, p))
2553                         return -EFAULT;
2554                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2555         case SNDCTL_DSP_GETIPTR:
2556         case SNDCTL_DSP_GETOPTR:
2557                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2558                         cmd == SNDCTL_DSP_GETIPTR ?
2559                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2560                         (struct count_info __user *) arg);
2561         case SNDCTL_DSP_MAPINBUF:
2562         case SNDCTL_DSP_MAPOUTBUF:
2563                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2564                         cmd == SNDCTL_DSP_MAPINBUF ?
2565                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2566                         (struct buffmem_desc __user *) arg);
2567         case SNDCTL_DSP_SETSYNCRO:
2568                 /* stop DMA now.. */
2569                 return 0;
2570         case SNDCTL_DSP_SETDUPLEX:
2571                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2572                         return 0;
2573                 return -EIO;
2574         case SNDCTL_DSP_GETODELAY:
2575                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2576                 if (res < 0) {
2577                         /* it's for sure, some broken apps don't check for error codes */
2578                         put_user(0, p);
2579                         return res;
2580                 }
2581                 return put_user(res, p);
2582         case SNDCTL_DSP_PROFILE:
2583                 return 0;       /* silently ignore */
2584         default:
2585                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2586         }
2587         return -EINVAL;
2588 }
2589
2590 #ifdef CONFIG_COMPAT
2591 /* all compatible */
2592 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2593 #else
2594 #define snd_pcm_oss_ioctl_compat        NULL
2595 #endif
2596
2597 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2598 {
2599         struct snd_pcm_oss_file *pcm_oss_file;
2600         struct snd_pcm_substream *substream;
2601
2602         pcm_oss_file = file->private_data;
2603         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2604         if (substream == NULL)
2605                 return -ENXIO;
2606         substream->f_flags = file->f_flags & O_NONBLOCK;
2607 #ifndef OSS_DEBUG
2608         return snd_pcm_oss_read1(substream, buf, count);
2609 #else
2610         {
2611                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2612                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2613                 return res;
2614         }
2615 #endif
2616 }
2617
2618 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2619 {
2620         struct snd_pcm_oss_file *pcm_oss_file;
2621         struct snd_pcm_substream *substream;
2622         long result;
2623
2624         pcm_oss_file = file->private_data;
2625         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2626         if (substream == NULL)
2627                 return -ENXIO;
2628         substream->f_flags = file->f_flags & O_NONBLOCK;
2629         result = snd_pcm_oss_write1(substream, buf, count);
2630 #ifdef OSS_DEBUG
2631         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2632 #endif
2633         return result;
2634 }
2635
2636 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2637 {
2638         struct snd_pcm_runtime *runtime = substream->runtime;
2639         if (atomic_read(&substream->mmap_count))
2640                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2641         else
2642                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2643 }
2644
2645 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2646 {
2647         struct snd_pcm_runtime *runtime = substream->runtime;
2648         if (atomic_read(&substream->mmap_count))
2649                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2650         else
2651                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2652 }
2653
2654 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2655 {
2656         struct snd_pcm_oss_file *pcm_oss_file;
2657         unsigned int mask;
2658         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2659
2660         pcm_oss_file = file->private_data;
2661
2662         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2663         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2664
2665         mask = 0;
2666         if (psubstream != NULL) {
2667                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2668                 poll_wait(file, &runtime->sleep, wait);
2669                 snd_pcm_stream_lock_irq(psubstream);
2670                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2671                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2672                      snd_pcm_oss_playback_ready(psubstream)))
2673                         mask |= POLLOUT | POLLWRNORM;
2674                 snd_pcm_stream_unlock_irq(psubstream);
2675         }
2676         if (csubstream != NULL) {
2677                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2678                 snd_pcm_state_t ostate;
2679                 poll_wait(file, &runtime->sleep, wait);
2680                 snd_pcm_stream_lock_irq(csubstream);
2681                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2682                     snd_pcm_oss_capture_ready(csubstream))
2683                         mask |= POLLIN | POLLRDNORM;
2684                 snd_pcm_stream_unlock_irq(csubstream);
2685                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2686                         struct snd_pcm_oss_file ofile;
2687                         memset(&ofile, 0, sizeof(ofile));
2688                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2689                         runtime->oss.trigger = 0;
2690                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2691                 }
2692         }
2693
2694         return mask;
2695 }
2696
2697 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2698 {
2699         struct snd_pcm_oss_file *pcm_oss_file;
2700         struct snd_pcm_substream *substream = NULL;
2701         struct snd_pcm_runtime *runtime;
2702         int err;
2703
2704 #ifdef OSS_DEBUG
2705         printk("pcm_oss: mmap begin\n");
2706 #endif
2707         pcm_oss_file = file->private_data;
2708         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2709         case VM_READ | VM_WRITE:
2710                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2711                 if (substream)
2712                         break;
2713                 /* Fall through */
2714         case VM_READ:
2715                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2716                 break;
2717         case VM_WRITE:
2718                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2719                 break;
2720         default:
2721                 return -EINVAL;
2722         }
2723         /* set VM_READ access as well to fix memset() routines that do
2724            reads before writes (to improve performance) */
2725         area->vm_flags |= VM_READ;
2726         if (substream == NULL)
2727                 return -ENXIO;
2728         runtime = substream->runtime;
2729         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2730                 return -EIO;
2731         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2732                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2733         else
2734                 return -EIO;
2735
2736         if (runtime->oss.params) {
2737                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2738                         return err;
2739         }
2740 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2741         if (runtime->oss.plugin_first != NULL)
2742                 return -EIO;
2743 #endif
2744
2745         if (area->vm_pgoff != 0)
2746                 return -EINVAL;
2747
2748         err = snd_pcm_mmap_data(substream, file, area);
2749         if (err < 0)
2750                 return err;
2751         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2752         runtime->silence_threshold = 0;
2753         runtime->silence_size = 0;
2754 #ifdef OSS_DEBUG
2755         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2756 #endif
2757         /* In mmap mode we never stop */
2758         runtime->stop_threshold = runtime->boundary;
2759
2760         return 0;
2761 }
2762
2763 #ifdef CONFIG_SND_VERBOSE_PROCFS
2764 /*
2765  *  /proc interface
2766  */
2767
2768 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2769                                   struct snd_info_buffer *buffer)
2770 {
2771         struct snd_pcm_str *pstr = entry->private_data;
2772         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2773         mutex_lock(&pstr->oss.setup_mutex);
2774         while (setup) {
2775                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2776                             setup->task_name,
2777                             setup->periods,
2778                             setup->period_size,
2779                             setup->disable ? " disable" : "",
2780                             setup->direct ? " direct" : "",
2781                             setup->block ? " block" : "",
2782                             setup->nonblock ? " non-block" : "",
2783                             setup->partialfrag ? " partial-frag" : "",
2784                             setup->nosilence ? " no-silence" : "");
2785                 setup = setup->next;
2786         }
2787         mutex_unlock(&pstr->oss.setup_mutex);
2788 }
2789
2790 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2791 {
2792         struct snd_pcm_oss_setup *setup, *setupn;
2793
2794         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2795              setup; setup = setupn) {
2796                 setupn = setup->next;
2797                 kfree(setup->task_name);
2798                 kfree(setup);
2799         }
2800         pstr->oss.setup_list = NULL;
2801 }
2802
2803 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2804                                    struct snd_info_buffer *buffer)
2805 {
2806         struct snd_pcm_str *pstr = entry->private_data;
2807         char line[128], str[32], task_name[32], *ptr;
2808         int idx1;
2809         struct snd_pcm_oss_setup *setup, *setup1, template;
2810
2811         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2812                 mutex_lock(&pstr->oss.setup_mutex);
2813                 memset(&template, 0, sizeof(template));
2814                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2815                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2816                         snd_pcm_oss_proc_free_setup_list(pstr);
2817                         mutex_unlock(&pstr->oss.setup_mutex);
2818                         continue;
2819                 }
2820                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2821                         if (!strcmp(setup->task_name, task_name)) {
2822                                 template = *setup;
2823                                 break;
2824                         }
2825                 }
2826                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2827                 template.periods = simple_strtoul(str, NULL, 10);
2828                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2829                 template.period_size = simple_strtoul(str, NULL, 10);
2830                 for (idx1 = 31; idx1 >= 0; idx1--)
2831                         if (template.period_size & (1 << idx1))
2832                                 break;
2833                 for (idx1--; idx1 >= 0; idx1--)
2834                         template.period_size &= ~(1 << idx1);
2835                 do {
2836                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2837                         if (!strcmp(str, "disable")) {
2838                                 template.disable = 1;
2839                         } else if (!strcmp(str, "direct")) {
2840                                 template.direct = 1;
2841                         } else if (!strcmp(str, "block")) {
2842                                 template.block = 1;
2843                         } else if (!strcmp(str, "non-block")) {
2844                                 template.nonblock = 1;
2845                         } else if (!strcmp(str, "partial-frag")) {
2846                                 template.partialfrag = 1;
2847                         } else if (!strcmp(str, "no-silence")) {
2848                                 template.nosilence = 1;
2849                         } else if (!strcmp(str, "buggy-ptr")) {
2850                                 template.buggyptr = 1;
2851                         }
2852                 } while (*str);
2853                 if (setup == NULL) {
2854                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2855                         if (! setup) {
2856                                 buffer->error = -ENOMEM;
2857                                 mutex_lock(&pstr->oss.setup_mutex);
2858                                 return;
2859                         }
2860                         if (pstr->oss.setup_list == NULL)
2861                                 pstr->oss.setup_list = setup;
2862                         else {
2863                                 for (setup1 = pstr->oss.setup_list;
2864                                      setup1->next; setup1 = setup1->next);
2865                                 setup1->next = setup;
2866                         }
2867                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2868                         if (! template.task_name) {
2869                                 kfree(setup);
2870                                 buffer->error = -ENOMEM;
2871                                 mutex_lock(&pstr->oss.setup_mutex);
2872                                 return;
2873                         }
2874                 }
2875                 *setup = template;
2876                 mutex_unlock(&pstr->oss.setup_mutex);
2877         }
2878 }
2879
2880 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2881 {
2882         int stream;
2883         for (stream = 0; stream < 2; ++stream) {
2884                 struct snd_info_entry *entry;
2885                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2886                 if (pstr->substream_count == 0)
2887                         continue;
2888                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2889                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2890                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2891                         entry->c.text.read = snd_pcm_oss_proc_read;
2892                         entry->c.text.write = snd_pcm_oss_proc_write;
2893                         entry->private_data = pstr;
2894                         if (snd_info_register(entry) < 0) {
2895                                 snd_info_free_entry(entry);
2896                                 entry = NULL;
2897                         }
2898                 }
2899                 pstr->oss.proc_entry = entry;
2900         }
2901 }
2902
2903 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2904 {
2905         int stream;
2906         for (stream = 0; stream < 2; ++stream) {
2907                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2908                 snd_info_free_entry(pstr->oss.proc_entry);
2909                 pstr->oss.proc_entry = NULL;
2910                 snd_pcm_oss_proc_free_setup_list(pstr);
2911         }
2912 }
2913 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2914 #define snd_pcm_oss_proc_init(pcm)
2915 #define snd_pcm_oss_proc_done(pcm)
2916 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2917
2918 /*
2919  *  ENTRY functions
2920  */
2921
2922 static const struct file_operations snd_pcm_oss_f_reg =
2923 {
2924         .owner =        THIS_MODULE,
2925         .read =         snd_pcm_oss_read,
2926         .write =        snd_pcm_oss_write,
2927         .open =         snd_pcm_oss_open,
2928         .release =      snd_pcm_oss_release,
2929         .poll =         snd_pcm_oss_poll,
2930         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2931         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2932         .mmap =         snd_pcm_oss_mmap,
2933 };
2934
2935 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2936 {
2937         char name[128];
2938         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2939         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2940                                     pcm->card, index, &snd_pcm_oss_f_reg,
2941                                     pcm, name) < 0) {
2942                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2943                            pcm->card->number, pcm->device);
2944         }
2945 }
2946
2947 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2948 {
2949         pcm->oss.reg = 0;
2950         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2951                 char name[128];
2952                 int duplex;
2953                 register_oss_dsp(pcm, 0);
2954                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2955                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2956                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2957                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2958 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2959                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2960                                       pcm->card->number,
2961                                       name);
2962 #endif
2963                 pcm->oss.reg++;
2964                 pcm->oss.reg_mask |= 1;
2965         }
2966         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2967                 register_oss_dsp(pcm, 1);
2968                 pcm->oss.reg++;
2969                 pcm->oss.reg_mask |= 2;
2970         }
2971
2972         if (pcm->oss.reg)
2973                 snd_pcm_oss_proc_init(pcm);
2974
2975         return 0;
2976 }
2977
2978 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2979 {
2980         if (pcm->oss.reg) {
2981                 if (pcm->oss.reg_mask & 1) {
2982                         pcm->oss.reg_mask &= ~1;
2983                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2984                                                   pcm->card, 0);
2985                 }
2986                 if (pcm->oss.reg_mask & 2) {
2987                         pcm->oss.reg_mask &= ~2;
2988                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2989                                                   pcm->card, 1);
2990                 }
2991                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2992 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2993                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2994 #endif
2995                 }
2996                 pcm->oss.reg = 0;
2997         }
2998         return 0;
2999 }
3000
3001 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3002 {
3003         snd_pcm_oss_disconnect_minor(pcm);
3004         snd_pcm_oss_proc_done(pcm);
3005         return 0;
3006 }
3007
3008 static struct snd_pcm_notify snd_pcm_oss_notify =
3009 {
3010         .n_register =   snd_pcm_oss_register_minor,
3011         .n_disconnect = snd_pcm_oss_disconnect_minor,
3012         .n_unregister = snd_pcm_oss_unregister_minor,
3013 };
3014
3015 static int __init alsa_pcm_oss_init(void)
3016 {
3017         int i;
3018         int err;
3019
3020         /* check device map table */
3021         for (i = 0; i < SNDRV_CARDS; i++) {
3022                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3023                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3024                                    i, dsp_map[i]);
3025                         dsp_map[i] = 0;
3026                 }
3027                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3028                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3029                                    i, adsp_map[i]);
3030                         adsp_map[i] = 1;
3031                 }
3032         }
3033         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3034                 return err;
3035         return 0;
3036 }
3037
3038 static void __exit alsa_pcm_oss_exit(void)
3039 {
3040         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3041 }
3042
3043 module_init(alsa_pcm_oss_init)
3044 module_exit(alsa_pcm_oss_exit)