sound/core/oss/pcm_oss.c

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