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/string.h>
  35 #include <sound/core.h>
  36 #include <sound/minors.h>
  37 #include <sound/pcm.h>
  38 #include <sound/pcm_params.h>
  39 #include "pcm_plugin.h"
  40 #include <sound/info.h>
  41 #include <linux/soundcard.h>
  42 #include <sound/initval.h>
  43
  44 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  45
  46 static int dsp_map[SNDRV_CARDS];
  47 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  48 static int nonblock_open = 1;
  49
  50 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  51 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  52 MODULE_LICENSE("GPL");
  53 module_param_array(dsp_map, int, NULL, 0444);
  54 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  55 module_param_array(adsp_map, int, NULL, 0444);
  56 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  57 module_param(nonblock_open, bool, 0644);
  58 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  59 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  61
  62 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
  63 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  64 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  65 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  66
  67 static inline mm_segment_t snd_enter_user(void)
  68 {
  69         mm_segment_t fs = get_fs();
  70         set_fs(get_ds());
  71         return fs;
  72 }
  73
  74 static inline void snd_leave_user(mm_segment_t fs)
  75 {
  76         set_fs(fs);
  77 }
  78
  79 /*
  80  * helper functions to process hw_params
  81  */
  82 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
  83 {
  84         int changed = 0;
  85         if (i->min < min) {
  86                 i->min = min;
  87                 i->openmin = openmin;
  88                 changed = 1;
  89         } else if (i->min == min && !i->openmin && openmin) {
  90                 i->openmin = 1;
  91                 changed = 1;
  92         }
  93         if (i->integer) {
  94                 if (i->openmin) {
  95                         i->min++;
  96                         i->openmin = 0;
  97                 }
  98         }
  99         if (snd_interval_checkempty(i)) {
 100                 snd_interval_none(i);
 101                 return -EINVAL;
 102         }
 103         return changed;
 104 }
 105
 106 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
 107 {
 108         int changed = 0;
 109         if (i->max > max) {
 110                 i->max = max;
 111                 i->openmax = openmax;
 112                 changed = 1;
 113         } else if (i->max == max && !i->openmax && openmax) {
 114                 i->openmax = 1;
 115                 changed = 1;
 116         }
 117         if (i->integer) {
 118                 if (i->openmax) {
 119                         i->max--;
 120                         i->openmax = 0;
 121                 }
 122         }
 123         if (snd_interval_checkempty(i)) {
 124                 snd_interval_none(i);
 125                 return -EINVAL;
 126         }
 127         return changed;
 128 }
 129
 130 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
 131 {
 132         struct snd_interval t;
 133         t.empty = 0;
 134         t.min = t.max = val;
 135         t.openmin = t.openmax = 0;
 136         t.integer = 1;
 137         return snd_interval_refine(i, &t);
 138 }
 139
 140 /**
 141  * snd_pcm_hw_param_value_min
 142  * @params: the hw_params instance
 143  * @var: parameter to retrieve
 144  * @dir: pointer to the direction (-1,0,1) or NULL
 145  *
 146  * Return the minimum value for field PAR.
 147  */
 148 static unsigned int
 149 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
 150                            snd_pcm_hw_param_t var, int *dir)
 151 {
 152         if (hw_is_mask(var)) {
 153                 if (dir)
 154                         *dir = 0;
 155                 return snd_mask_min(hw_param_mask_c(params, var));
 156         }
 157         if (hw_is_interval(var)) {
 158                 const struct snd_interval *i = hw_param_interval_c(params, var);
 159                 if (dir)
 160                         *dir = i->openmin;
 161                 return snd_interval_min(i);
 162         }
 163         return -EINVAL;
 164 }
 165
 166 /**
 167  * snd_pcm_hw_param_value_max
 168  * @params: the hw_params instance
 169  * @var: parameter to retrieve
 170  * @dir: pointer to the direction (-1,0,1) or NULL
 171  *
 172  * Return the maximum value for field PAR.
 173  */
 174 static unsigned int
 175 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 176                            snd_pcm_hw_param_t var, int *dir)
 177 {
 178         if (hw_is_mask(var)) {
 179                 if (dir)
 180                         *dir = 0;
 181                 return snd_mask_max(hw_param_mask_c(params, var));
 182         }
 183         if (hw_is_interval(var)) {
 184                 const struct snd_interval *i = hw_param_interval_c(params, var);
 185                 if (dir)
 186                         *dir = - (int) i->openmax;
 187                 return snd_interval_max(i);
 188         }
 189         return -EINVAL;
 190 }
 191
 192 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
 193                                   snd_pcm_hw_param_t var,
 194                                   const struct snd_mask *val)
 195 {
 196         int changed;
 197         changed = snd_mask_refine(hw_param_mask(params, var), val);
 198         if (changed) {
 199                 params->cmask |= 1 << var;
 200                 params->rmask |= 1 << var;
 201         }
 202         return changed;
 203 }
 204
 205 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
 206                                  struct snd_pcm_hw_params *params,
 207                                  snd_pcm_hw_param_t var,
 208                                  const struct snd_mask *val)
 209 {
 210         int changed = _snd_pcm_hw_param_mask(params, var, val);
 211         if (changed < 0)
 212                 return changed;
 213         if (params->rmask) {
 214                 int err = snd_pcm_hw_refine(pcm, params);
 215                 if (err < 0)
 216                         return err;
 217         }
 218         return 0;
 219 }
 220
 221 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
 222                                  snd_pcm_hw_param_t var, unsigned int val,
 223                                  int dir)
 224 {
 225         int changed;
 226         int open = 0;
 227         if (dir) {
 228                 if (dir > 0) {
 229                         open = 1;
 230                 } else if (dir < 0) {
 231                         if (val > 0) {
 232                                 open = 1;
 233                                 val--;
 234                         }
 235                 }
 236         }
 237         if (hw_is_mask(var))
 238                 changed = snd_mask_refine_min(hw_param_mask(params, var),
 239                                               val + !!open);
 240         else if (hw_is_interval(var))
 241                 changed = snd_interval_refine_min(hw_param_interval(params, var),
 242                                                   val, open);
 243         else
 244                 return -EINVAL;
 245         if (changed) {
 246                 params->cmask |= 1 << var;
 247                 params->rmask |= 1 << var;
 248         }
 249         return changed;
 250 }
 251
 252 /**
 253  * snd_pcm_hw_param_min
 254  * @pcm: PCM instance
 255  * @params: the hw_params instance
 256  * @var: parameter to retrieve
 257  * @val: minimal value
 258  * @dir: pointer to the direction (-1,0,1) or NULL
 259  *
 260  * Inside configuration space defined by PARAMS remove from PAR all
 261  * values < VAL. Reduce configuration space accordingly.
 262  * Return new minimum or -EINVAL if the configuration space is empty
 263  */
 264 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
 265                                 struct snd_pcm_hw_params *params,
 266                                 snd_pcm_hw_param_t var, unsigned int val,
 267                                 int *dir)
 268 {
 269         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
 270         if (changed < 0)
 271                 return changed;
 272         if (params->rmask) {
 273                 int err = snd_pcm_hw_refine(pcm, params);
 274                 if (err < 0)
 275                         return err;
 276         }
 277         return snd_pcm_hw_param_value_min(params, var, dir);
 278 }
 279
 280 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
 281                                  snd_pcm_hw_param_t var, unsigned int val,
 282                                  int dir)
 283 {
 284         int changed;
 285         int open = 0;
 286         if (dir) {
 287                 if (dir < 0) {
 288                         open = 1;
 289                 } else if (dir > 0) {
 290                         open = 1;
 291                         val++;
 292                 }
 293         }
 294         if (hw_is_mask(var)) {
 295                 if (val == 0 && open) {
 296                         snd_mask_none(hw_param_mask(params, var));
 297                         changed = -EINVAL;
 298                 } else
 299                         changed = snd_mask_refine_max(hw_param_mask(params, var),
 300                                                       val - !!open);
 301         } else if (hw_is_interval(var))
 302                 changed = snd_interval_refine_max(hw_param_interval(params, var),
 303                                                   val, open);
 304         else
 305                 return -EINVAL;
 306         if (changed) {
 307                 params->cmask |= 1 << var;
 308                 params->rmask |= 1 << var;
 309         }
 310         return changed;
 311 }
 312
 313 /**
 314  * snd_pcm_hw_param_max
 315  * @pcm: PCM instance
 316  * @params: the hw_params instance
 317  * @var: parameter to retrieve
 318  * @val: maximal value
 319  * @dir: pointer to the direction (-1,0,1) or NULL
 320  *
 321  * Inside configuration space defined by PARAMS remove from PAR all
 322  *  values >= VAL + 1. Reduce configuration space accordingly.
 323  *  Return new maximum or -EINVAL if the configuration space is empty
 324  */
 325 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
 326                                 struct snd_pcm_hw_params *params,
 327                                 snd_pcm_hw_param_t var, unsigned int val,
 328                                 int *dir)
 329 {
 330         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
 331         if (changed < 0)
 332                 return changed;
 333         if (params->rmask) {
 334                 int err = snd_pcm_hw_refine(pcm, params);
 335                 if (err < 0)
 336                         return err;
 337         }
 338         return snd_pcm_hw_param_value_max(params, var, dir);
 339 }
 340
 341 static int boundary_sub(int a, int adir,
 342                         int b, int bdir,
 343                         int *c, int *cdir)
 344 {
 345         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
 346         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
 347         *c = a - b;
 348         *cdir = adir - bdir;
 349         if (*cdir == -2) {
 350                 (*c)--;
 351         } else if (*cdir == 2) {
 352                 (*c)++;
 353         }
 354         return 0;
 355 }
 356
 357 static int boundary_lt(unsigned int a, int adir,
 358                        unsigned int b, int bdir)
 359 {
 360         if (adir < 0) {
 361                 a--;
 362                 adir = 1;
 363         } else if (adir > 0)
 364                 adir = 1;
 365         if (bdir < 0) {
 366                 b--;
 367                 bdir = 1;
 368         } else if (bdir > 0)
 369                 bdir = 1;
 370         return a < b || (a == b && adir < bdir);
 371 }
 372
 373 /* Return 1 if min is nearer to best than max */
 374 static int boundary_nearer(int min, int mindir,
 375                            int best, int bestdir,
 376                            int max, int maxdir)
 377 {
 378         int dmin, dmindir;
 379         int dmax, dmaxdir;
 380         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
 381         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
 382         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
 383 }
 384
 385 /**
 386  * snd_pcm_hw_param_near
 387  * @pcm: PCM instance
 388  * @params: the hw_params instance
 389  * @var: parameter to retrieve
 390  * @best: value to set
 391  * @dir: pointer to the direction (-1,0,1) or NULL
 392  *
 393  * Inside configuration space defined by PARAMS set PAR to the available value
 394  * nearest to VAL. Reduce configuration space accordingly.
 395  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
 396  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
 397  * Return the value found.
 398   */
 399 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 400                                  struct snd_pcm_hw_params *params,
 401                                  snd_pcm_hw_param_t var, unsigned int best,
 402                                  int *dir)
 403 {
 404         struct snd_pcm_hw_params *save = NULL;
 405         int v;
 406         unsigned int saved_min;
 407         int last = 0;
 408         int min, max;
 409         int mindir, maxdir;
 410         int valdir = dir ? *dir : 0;
 411         /* FIXME */
 412         if (best > INT_MAX)
 413                 best = INT_MAX;
 414         min = max = best;
 415         mindir = maxdir = valdir;
 416         if (maxdir > 0)
 417                 maxdir = 0;
 418         else if (maxdir == 0)
 419                 maxdir = -1;
 420         else {
 421                 maxdir = 1;
 422                 max--;
 423         }
 424         save = kmalloc(sizeof(*save), GFP_KERNEL);
 425         if (save == NULL)
 426                 return -ENOMEM;
 427         *save = *params;
 428         saved_min = min;
 429         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
 430         if (min >= 0) {
 431                 struct snd_pcm_hw_params *params1;
 432                 if (max < 0)
 433                         goto _end;
 434                 if ((unsigned int)min == saved_min && mindir == valdir)
 435                         goto _end;
 436                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
 437                 if (params1 == NULL) {
 438                         kfree(save);
 439                         return -ENOMEM;
 440                 }
 441                 *params1 = *save;
 442                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
 443                 if (max < 0) {
 444                         kfree(params1);
 445                         goto _end;
 446                 }
 447                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
 448                         *params = *params1;
 449                         last = 1;
 450                 }
 451                 kfree(params1);
 452         } else {
 453                 *params = *save;
 454                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
 455                 if (max < 0)
 456                         return max;
 457                 last = 1;
 458         }
 459  _end:
 460         kfree(save);
 461         if (last)
 462                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 463         else
 464                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 465         snd_BUG_ON(v < 0);
 466         return v;
 467 }
 468
 469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 470                                  snd_pcm_hw_param_t var, unsigned int val,
 471                                  int dir)
 472 {
 473         int changed;
 474         if (hw_is_mask(var)) {
 475                 struct snd_mask *m = hw_param_mask(params, var);
 476                 if (val == 0 && dir < 0) {
 477                         changed = -EINVAL;
 478                         snd_mask_none(m);
 479                 } else {
 480                         if (dir > 0)
 481                                 val++;
 482                         else if (dir < 0)
 483                                 val--;
 484                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 485                 }
 486         } else if (hw_is_interval(var)) {
 487                 struct snd_interval *i = hw_param_interval(params, var);
 488                 if (val == 0 && dir < 0) {
 489                         changed = -EINVAL;
 490                         snd_interval_none(i);
 491                 } else if (dir == 0)
 492                         changed = snd_interval_refine_set(i, val);
 493                 else {
 494                         struct snd_interval t;
 495                         t.openmin = 1;
 496                         t.openmax = 1;
 497                         t.empty = 0;
 498                         t.integer = 0;
 499                         if (dir < 0) {
 500                                 t.min = val - 1;
 501                                 t.max = val;
 502                         } else {
 503                                 t.min = val;
 504                                 t.max = val+1;
 505                         }
 506                         changed = snd_interval_refine(i, &t);
 507                 }
 508         } else
 509                 return -EINVAL;
 510         if (changed) {
 511                 params->cmask |= 1 << var;
 512                 params->rmask |= 1 << var;
 513         }
 514         return changed;
 515 }
 516
 517 /**
 518  * snd_pcm_hw_param_set
 519  * @pcm: PCM instance
 520  * @params: the hw_params instance
 521  * @var: parameter to retrieve
 522  * @val: value to set
 523  * @dir: pointer to the direction (-1,0,1) or NULL
 524  *
 525  * Inside configuration space defined by PARAMS remove from PAR all
 526  * values != VAL. Reduce configuration space accordingly.
 527  *  Return VAL or -EINVAL if the configuration space is empty
 528  */
 529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 530                                 struct snd_pcm_hw_params *params,
 531                                 snd_pcm_hw_param_t var, unsigned int val,
 532                                 int dir)
 533 {
 534         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 535         if (changed < 0)
 536                 return changed;
 537         if (params->rmask) {
 538                 int err = snd_pcm_hw_refine(pcm, params);
 539                 if (err < 0)
 540                         return err;
 541         }
 542         return snd_pcm_hw_param_value(params, var, NULL);
 543 }
 544
 545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 546                                         snd_pcm_hw_param_t var)
 547 {
 548         int changed;
 549         changed = snd_interval_setinteger(hw_param_interval(params, var));
 550         if (changed) {
 551                 params->cmask |= 1 << var;
 552                 params->rmask |= 1 << var;
 553         }
 554         return changed;
 555 }
 556
 557 /*
 558  * plugin
 559  */
 560
 561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 563 {
 564         struct snd_pcm_runtime *runtime = substream->runtime;
 565         struct snd_pcm_plugin *plugin, *next;
 566
 567         plugin = runtime->oss.plugin_first;
 568         while (plugin) {
 569                 next = plugin->next;
 570                 snd_pcm_plugin_free(plugin);
 571                 plugin = next;
 572         }
 573         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 574         return 0;
 575 }
 576
 577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 578 {
 579         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 580         plugin->next = runtime->oss.plugin_first;
 581         plugin->prev = NULL;
 582         if (runtime->oss.plugin_first) {
 583                 runtime->oss.plugin_first->prev = plugin;
 584                 runtime->oss.plugin_first = plugin;
 585         } else {
 586                 runtime->oss.plugin_last =
 587                 runtime->oss.plugin_first = plugin;
 588         }
 589         return 0;
 590 }
 591
 592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 593 {
 594         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 595         plugin->next = NULL;
 596         plugin->prev = runtime->oss.plugin_last;
 597         if (runtime->oss.plugin_last) {
 598                 runtime->oss.plugin_last->next = plugin;
 599                 runtime->oss.plugin_last = plugin;
 600         } else {
 601                 runtime->oss.plugin_last =
 602                 runtime->oss.plugin_first = plugin;
 603         }
 604         return 0;
 605 }
 606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 607
 608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 609 {
 610         struct snd_pcm_runtime *runtime = substream->runtime;
 611         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 612         long bytes = frames_to_bytes(runtime, frames);
 613         if (buffer_size == runtime->oss.buffer_bytes)
 614                 return bytes;
 615 #if BITS_PER_LONG >= 64
 616         return runtime->oss.buffer_bytes * bytes / buffer_size;
 617 #else
 618         {
 619                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 620                 u32 rem;
 621                 div64_32(&bsize, buffer_size, &rem);
 622                 return (long)bsize;
 623         }
 624 #endif
 625 }
 626
 627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 628 {
 629         struct snd_pcm_runtime *runtime = substream->runtime;
 630         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 631         if (buffer_size == runtime->oss.buffer_bytes)
 632                 return bytes_to_frames(runtime, bytes);
 633         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 634 }
 635
 636 /* define extended formats in the recent OSS versions (if any) */
 637 /* linear formats */
 638 #define AFMT_S32_LE      0x00001000
 639 #define AFMT_S32_BE      0x00002000
 640 #define AFMT_S24_LE      0x00008000
 641 #define AFMT_S24_BE      0x00010000
 642 #define AFMT_S24_PACKED  0x00040000
 643
 644 /* other supported formats */
 645 #define AFMT_FLOAT       0x00004000
 646 #define AFMT_SPDIF_RAW   0x00020000
 647
 648 /* unsupported formats */
 649 #define AFMT_AC3         0x00000400
 650 #define AFMT_VORBIS      0x00000800
 651
 652 static int snd_pcm_oss_format_from(int format)
 653 {
 654         switch (format) {
 655         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 656         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 657         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 658         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 659         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 660         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 661         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 662         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 663         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 664         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 665         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 666         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 667         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 668         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 669         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 670         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 671         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 672         default:                return SNDRV_PCM_FORMAT_U8;
 673         }
 674 }
 675
 676 static int snd_pcm_oss_format_to(int format)
 677 {
 678         switch (format) {
 679         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 680         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 681         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 682         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 683         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 684         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 685         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 686         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 687         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 688         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 689         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 690         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 691         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 692         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 693         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 694         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 695         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 696         default:                        return -EINVAL;
 697         }
 698 }
 699
 700 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 701                                    struct snd_pcm_hw_params *oss_params,
 702                                    struct snd_pcm_hw_params *slave_params)
 703 {
 704         size_t s;
 705         size_t oss_buffer_size, oss_period_size, oss_periods;
 706         size_t min_period_size, max_period_size;
 707         struct snd_pcm_runtime *runtime = substream->runtime;
 708         size_t oss_frame_size;
 709
 710         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 711                          params_channels(oss_params) / 8;
 712
 713         oss_buffer_size = snd_pcm_plug_client_size(substream,
 714                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 715         oss_buffer_size = 1 << ld2(oss_buffer_size);
 716         if (atomic_read(&substream->mmap_count)) {
 717                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 718                         oss_buffer_size = runtime->oss.mmap_bytes;
 719         }
 720
 721         if (substream->oss.setup.period_size > 16)
 722                 oss_period_size = substream->oss.setup.period_size;
 723         else if (runtime->oss.fragshift) {
 724                 oss_period_size = 1 << runtime->oss.fragshift;
 725                 if (oss_period_size > oss_buffer_size / 2)
 726                         oss_period_size = oss_buffer_size / 2;
 727         } else {
 728                 int sd;
 729                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 730
 731                 oss_period_size = oss_buffer_size;
 732                 do {
 733                         oss_period_size /= 2;
 734                 } while (oss_period_size > bytes_per_sec);
 735                 if (runtime->oss.subdivision == 0) {
 736                         sd = 4;
 737                         if (oss_period_size / sd > 4096)
 738                                 sd *= 2;
 739                         if (oss_period_size / sd < 4096)
 740                                 sd = 1;
 741                 } else
 742                         sd = runtime->oss.subdivision;
 743                 oss_period_size /= sd;
 744                 if (oss_period_size < 16)
 745                         oss_period_size = 16;
 746         }
 747
 748         min_period_size = snd_pcm_plug_client_size(substream,
 749                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 750         min_period_size *= oss_frame_size;
 751         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 752         if (oss_period_size < min_period_size)
 753                 oss_period_size = min_period_size;
 754
 755         max_period_size = snd_pcm_plug_client_size(substream,
 756                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 757         max_period_size *= oss_frame_size;
 758         max_period_size = 1 << ld2(max_period_size);
 759         if (oss_period_size > max_period_size)
 760                 oss_period_size = max_period_size;
 761
 762         oss_periods = oss_buffer_size / oss_period_size;
 763
 764         if (substream->oss.setup.periods > 1)
 765                 oss_periods = substream->oss.setup.periods;
 766
 767         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 768         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 769                 s = runtime->oss.maxfrags;
 770         if (oss_periods > s)
 771                 oss_periods = s;
 772
 773         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 774         if (s < 2)
 775                 s = 2;
 776         if (oss_periods < s)
 777                 oss_periods = s;
 778
 779         while (oss_period_size * oss_periods > oss_buffer_size)
 780                 oss_period_size /= 2;
 781
 782         if (oss_period_size < 16)
 783                 return -EINVAL;
 784         runtime->oss.period_bytes = oss_period_size;
 785         runtime->oss.period_frames = 1;
 786         runtime->oss.periods = oss_periods;
 787         return 0;
 788 }
 789
 790 static int choose_rate(struct snd_pcm_substream *substream,
 791                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 792 {
 793         struct snd_interval *it;
 794         struct snd_pcm_hw_params *save;
 795         unsigned int rate, prev;
 796
 797         save = kmalloc(sizeof(*save), GFP_KERNEL);
 798         if (save == NULL)
 799                 return -ENOMEM;
 800         *save = *params;
 801         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 802
 803         /* try multiples of the best rate */
 804         rate = best_rate;
 805         for (;;) {
 806                 if (it->max < rate || (it->max == rate && it->openmax))
 807                         break;
 808                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 809                         int ret;
 810                         ret = snd_pcm_hw_param_set(substream, params,
 811                                                    SNDRV_PCM_HW_PARAM_RATE,
 812                                                    rate, 0);
 813                         if (ret == (int)rate) {
 814                                 kfree(save);
 815                                 return rate;
 816                         }
 817                         *params = *save;
 818                 }
 819                 prev = rate;
 820                 rate += best_rate;
 821                 if (rate <= prev)
 822                         break;
 823         }
 824
 825         /* not found, use the nearest rate */
 826         kfree(save);
 827         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 828 }
 829
 830 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 831 {
 832         struct snd_pcm_runtime *runtime = substream->runtime;
 833         struct snd_pcm_hw_params *params, *sparams;
 834         struct snd_pcm_sw_params *sw_params;
 835         ssize_t oss_buffer_size, oss_period_size;
 836         size_t oss_frame_size;
 837         int err;
 838         int direct;
 839         int format, sformat, n;
 840         struct snd_mask sformat_mask;
 841         struct snd_mask mask;
 842
 843         if (mutex_lock_interruptible(&runtime->oss.params_lock))
 844                 return -EINTR;
 845         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 846         params = kmalloc(sizeof(*params), GFP_KERNEL);
 847         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 848         if (!sw_params || !params || !sparams) {
 849                 snd_printd("No memory\n");
 850                 err = -ENOMEM;
 851                 goto failure;
 852         }
 853
 854         if (atomic_read(&substream->mmap_count))
 855                 direct = 1;
 856         else
 857                 direct = substream->oss.setup.direct;
 858
 859         _snd_pcm_hw_params_any(sparams);
 860         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 861         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 862         snd_mask_none(&mask);
 863         if (atomic_read(&substream->mmap_count))
 864                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 865         else {
 866                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 867                 if (!direct)
 868                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 869         }
 870         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 871         if (err < 0) {
 872                 snd_printd("No usable accesses\n");
 873                 err = -EINVAL;
 874                 goto failure;
 875         }
 876         choose_rate(substream, sparams, runtime->oss.rate);
 877         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 878
 879         format = snd_pcm_oss_format_from(runtime->oss.format);
 880
 881         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 882         if (direct)
 883                 sformat = format;
 884         else
 885                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 886
 887         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 888                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 889                         if (snd_mask_test(&sformat_mask, sformat) &&
 890                             snd_pcm_oss_format_to(sformat) >= 0)
 891                                 break;
 892                 }
 893                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 894                         snd_printd("Cannot find a format!!!\n");
 895                         err = -EINVAL;
 896                         goto failure;
 897                 }
 898         }
 899         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 900         if (err < 0)
 901                 goto failure;
 902
 903         if (direct) {
 904                 memcpy(params, sparams, sizeof(*params));
 905         } else {
 906                 _snd_pcm_hw_params_any(params);
 907                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 908                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 909                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 910                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 911                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 912                                       runtime->oss.channels, 0);
 913                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 914                                       runtime->oss.rate, 0);
 915                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 916                          params_access(params), params_format(params),
 917                          params_channels(params), params_rate(params));
 918         }
 919         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 920                  params_access(sparams), params_format(sparams),
 921                  params_channels(sparams), params_rate(sparams));
 922
 923         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 924                          params_channels(params) / 8;
 925
 926 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 927         snd_pcm_oss_plugin_clear(substream);
 928         if (!direct) {
 929                 /* add necessary plugins */
 930                 snd_pcm_oss_plugin_clear(substream);
 931                 if ((err = snd_pcm_plug_format_plugins(substream,
 932                                                        params,
 933                                                        sparams)) < 0) {
 934                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 935                         snd_pcm_oss_plugin_clear(substream);
 936                         goto failure;
 937                 }
 938                 if (runtime->oss.plugin_first) {
 939                         struct snd_pcm_plugin *plugin;
 940                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 941                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 942                                 snd_pcm_oss_plugin_clear(substream);
 943                                 goto failure;
 944                         }
 945                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 946                                 err = snd_pcm_plugin_append(plugin);
 947                         } else {
 948                                 err = snd_pcm_plugin_insert(plugin);
 949                         }
 950                         if (err < 0) {
 951                                 snd_pcm_oss_plugin_clear(substream);
 952                                 goto failure;
 953                         }
 954                 }
 955         }
 956 #endif
 957
 958         err = snd_pcm_oss_period_size(substream, params, sparams);
 959         if (err < 0)
 960                 goto failure;
 961
 962         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 963         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 964         if (err < 0)
 965                 goto failure;
 966
 967         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 968                                      runtime->oss.periods, NULL);
 969         if (err < 0)
 970                 goto failure;
 971
 972         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 973
 974         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 975                 snd_printd("HW_PARAMS failed: %i\n", err);
 976                 goto failure;
 977         }
 978
 979         memset(sw_params, 0, sizeof(*sw_params));
 980         if (runtime->oss.trigger) {
 981                 sw_params->start_threshold = 1;
 982         } else {
 983                 sw_params->start_threshold = runtime->boundary;
 984         }
 985         if (atomic_read(&substream->mmap_count) ||
 986             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 987                 sw_params->stop_threshold = runtime->boundary;
 988         else
 989                 sw_params->stop_threshold = runtime->buffer_size;
 990         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 991         sw_params->period_step = 1;
 992         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 993                 1 : runtime->period_size;
 994         if (atomic_read(&substream->mmap_count) ||
 995             substream->oss.setup.nosilence) {
 996                 sw_params->silence_threshold = 0;
 997                 sw_params->silence_size = 0;
 998         } else {
 999                 snd_pcm_uframes_t frames;
1000                 frames = runtime->period_size + 16;
1001                 if (frames > runtime->buffer_size)
1002                         frames = runtime->buffer_size;
1003                 sw_params->silence_threshold = frames;
1004                 sw_params->silence_size = frames;
1005         }
1006
1007         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1008                 snd_printd("SW_PARAMS failed: %i\n", err);
1009                 goto failure;
1010         }
1011
1012         runtime->oss.periods = params_periods(sparams);
1013         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1014         if (oss_period_size < 0) {
1015                 err = -EINVAL;
1016                 goto failure;
1017         }
1018 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1019         if (runtime->oss.plugin_first) {
1020                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1021                 if (err < 0)
1022                         goto failure;
1023         }
1024 #endif
1025         oss_period_size *= oss_frame_size;
1026
1027         oss_buffer_size = oss_period_size * runtime->oss.periods;
1028         if (oss_buffer_size < 0) {
1029                 err = -EINVAL;
1030                 goto failure;
1031         }
1032
1033         runtime->oss.period_bytes = oss_period_size;
1034         runtime->oss.buffer_bytes = oss_buffer_size;
1035
1036         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1037                  runtime->oss.period_bytes,
1038                  runtime->oss.buffer_bytes);
1039         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1040                  params_period_size(sparams),
1041                  params_buffer_size(sparams));
1042
1043         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1044         runtime->oss.channels = params_channels(params);
1045         runtime->oss.rate = params_rate(params);
1046
1047         runtime->oss.params = 0;
1048         runtime->oss.prepare = 1;
1049         vfree(runtime->oss.buffer);
1050         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1051         runtime->oss.buffer_used = 0;
1052         if (runtime->dma_area)
1053                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1054
1055         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1056
1057         err = 0;
1058 failure:
1059         kfree(sw_params);
1060         kfree(params);
1061         kfree(sparams);
1062         mutex_unlock(&runtime->oss.params_lock);
1063         return err;
1064 }
1065
1066 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1067 {
1068         int idx, err;
1069         struct snd_pcm_substream *asubstream = NULL, *substream;
1070
1071         for (idx = 0; idx < 2; idx++) {
1072                 substream = pcm_oss_file->streams[idx];
1073                 if (substream == NULL)
1074                         continue;
1075                 if (asubstream == NULL)
1076                         asubstream = substream;
1077                 if (substream->runtime->oss.params) {
1078                         err = snd_pcm_oss_change_params(substream);
1079                         if (err < 0)
1080                                 return err;
1081                 }
1082         }
1083         if (!asubstream)
1084                 return -EIO;
1085         if (r_substream)
1086                 *r_substream = asubstream;
1087         return 0;
1088 }
1089
1090 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1091 {
1092         int err;
1093         struct snd_pcm_runtime *runtime = substream->runtime;
1094
1095         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1096         if (err < 0) {
1097                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1098                 return err;
1099         }
1100         runtime->oss.prepare = 0;
1101         runtime->oss.prev_hw_ptr_interrupt = 0;
1102         runtime->oss.period_ptr = 0;
1103         runtime->oss.buffer_used = 0;
1104
1105         return 0;
1106 }
1107
1108 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1109 {
1110         struct snd_pcm_runtime *runtime;
1111         int err;
1112
1113         if (substream == NULL)
1114                 return 0;
1115         runtime = substream->runtime;
1116         if (runtime->oss.params) {
1117                 err = snd_pcm_oss_change_params(substream);
1118                 if (err < 0)
1119                         return err;
1120         }
1121         if (runtime->oss.prepare) {
1122                 err = snd_pcm_oss_prepare(substream);
1123                 if (err < 0)
1124                         return err;
1125         }
1126         return 0;
1127 }
1128
1129 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1130 {
1131         struct snd_pcm_runtime *runtime;
1132         snd_pcm_uframes_t frames;
1133         int err = 0;
1134
1135         while (1) {
1136                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1137                 if (err < 0)
1138                         break;
1139                 runtime = substream->runtime;
1140                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1141                         break;
1142                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1143                 /* until avail(delay) <= buffer_size */
1144                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1145                 frames /= runtime->period_size;
1146                 frames *= runtime->period_size;
1147                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1148                 if (err < 0)
1149                         break;
1150         }
1151         return err;
1152 }
1153
1154 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1155 {
1156         struct snd_pcm_runtime *runtime = substream->runtime;
1157         int ret;
1158         while (1) {
1159                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1160                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1161 #ifdef OSS_DEBUG
1162                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1163                                 printk(KERN_DEBUG "pcm_oss: write: "
1164                                        "recovering from XRUN\n");
1165                         else
1166                                 printk(KERN_DEBUG "pcm_oss: write: "
1167                                        "recovering from SUSPEND\n");
1168 #endif
1169                         ret = snd_pcm_oss_prepare(substream);
1170                         if (ret < 0)
1171                                 break;
1172                 }
1173                 if (in_kernel) {
1174                         mm_segment_t fs;
1175                         fs = snd_enter_user();
1176                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1177                         snd_leave_user(fs);
1178                 } else {
1179                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1180                 }
1181                 if (ret != -EPIPE && ret != -ESTRPIPE)
1182                         break;
1183                 /* test, if we can't store new data, because the stream */
1184                 /* has not been started */
1185                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1186                         return -EAGAIN;
1187         }
1188         return ret;
1189 }
1190
1191 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1192 {
1193         struct snd_pcm_runtime *runtime = substream->runtime;
1194         snd_pcm_sframes_t delay;
1195         int ret;
1196         while (1) {
1197                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1198                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1199 #ifdef OSS_DEBUG
1200                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1201                                 printk(KERN_DEBUG "pcm_oss: read: "
1202                                        "recovering from XRUN\n");
1203                         else
1204                                 printk(KERN_DEBUG "pcm_oss: read: "
1205                                        "recovering from SUSPEND\n");
1206 #endif
1207                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1208                         if (ret < 0)
1209                                 break;
1210                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1211                         ret = snd_pcm_oss_prepare(substream);
1212                         if (ret < 0)
1213                                 break;
1214                 }
1215                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1216                 if (ret < 0)
1217                         break;
1218                 if (in_kernel) {
1219                         mm_segment_t fs;
1220                         fs = snd_enter_user();
1221                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1222                         snd_leave_user(fs);
1223                 } else {
1224                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1225                 }
1226                 if (ret == -EPIPE) {
1227                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1228                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1229                                 if (ret < 0)
1230                                         break;
1231                         }
1232                         continue;
1233                 }
1234                 if (ret != -ESTRPIPE)
1235                         break;
1236         }
1237         return ret;
1238 }
1239
1240 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1241 {
1242         struct snd_pcm_runtime *runtime = substream->runtime;
1243         int ret;
1244         while (1) {
1245                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1246                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1247 #ifdef OSS_DEBUG
1248                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1249                                 printk(KERN_DEBUG "pcm_oss: writev: "
1250                                        "recovering from XRUN\n");
1251                         else
1252                                 printk(KERN_DEBUG "pcm_oss: writev: "
1253                                        "recovering from SUSPEND\n");
1254 #endif
1255                         ret = snd_pcm_oss_prepare(substream);
1256                         if (ret < 0)
1257                                 break;
1258                 }
1259                 if (in_kernel) {
1260                         mm_segment_t fs;
1261                         fs = snd_enter_user();
1262                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1263                         snd_leave_user(fs);
1264                 } else {
1265                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1266                 }
1267                 if (ret != -EPIPE && ret != -ESTRPIPE)
1268                         break;
1269
1270                 /* test, if we can't store new data, because the stream */
1271                 /* has not been started */
1272                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1273                         return -EAGAIN;
1274         }
1275         return ret;
1276 }
1277
1278 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1279 {
1280         struct snd_pcm_runtime *runtime = substream->runtime;
1281         int ret;
1282         while (1) {
1283                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1284                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1285 #ifdef OSS_DEBUG
1286                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1287                                 printk(KERN_DEBUG "pcm_oss: readv: "
1288                                        "recovering from XRUN\n");
1289                         else
1290                                 printk(KERN_DEBUG "pcm_oss: readv: "
1291                                        "recovering from SUSPEND\n");
1292 #endif
1293                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1294                         if (ret < 0)
1295                                 break;
1296                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1297                         ret = snd_pcm_oss_prepare(substream);
1298                         if (ret < 0)
1299                                 break;
1300                 }
1301                 if (in_kernel) {
1302                         mm_segment_t fs;
1303                         fs = snd_enter_user();
1304                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1305                         snd_leave_user(fs);
1306                 } else {
1307                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1308                 }
1309                 if (ret != -EPIPE && ret != -ESTRPIPE)
1310                         break;
1311         }
1312         return ret;
1313 }
1314
1315 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1316 {
1317         struct snd_pcm_runtime *runtime = substream->runtime;
1318         snd_pcm_sframes_t frames, frames1;
1319 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1320         if (runtime->oss.plugin_first) {
1321                 struct snd_pcm_plugin_channel *channels;
1322                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1323                 if (!in_kernel) {
1324                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1325                                 return -EFAULT;
1326                         buf = runtime->oss.buffer;
1327                 }
1328                 frames = bytes / oss_frame_bytes;
1329                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1330                 if (frames1 < 0)
1331                         return frames1;
1332                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1333                 if (frames1 <= 0)
1334                         return frames1;
1335                 bytes = frames1 * oss_frame_bytes;
1336         } else
1337 #endif
1338         {
1339                 frames = bytes_to_frames(runtime, bytes);
1340                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1341                 if (frames1 <= 0)
1342                         return frames1;
1343                 bytes = frames_to_bytes(runtime, frames1);
1344         }
1345         return bytes;
1346 }
1347
1348 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1349 {
1350         size_t xfer = 0;
1351         ssize_t tmp;
1352         struct snd_pcm_runtime *runtime = substream->runtime;
1353
1354         if (atomic_read(&substream->mmap_count))
1355                 return -ENXIO;
1356
1357         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1358                 return tmp;
1359         mutex_lock(&runtime->oss.params_lock);
1360         while (bytes > 0) {
1361                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1362                         tmp = bytes;
1363                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1364                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1365                         if (tmp > 0) {
1366                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1367                                         tmp = -EFAULT;
1368                                         goto err;
1369                                 }
1370                         }
1371                         runtime->oss.buffer_used += tmp;
1372                         buf += tmp;
1373                         bytes -= tmp;
1374                         xfer += tmp;
1375                         if (substream->oss.setup.partialfrag ||
1376                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1377                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1378                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1379                                 if (tmp <= 0)
1380                                         goto err;
1381                                 runtime->oss.bytes += tmp;
1382                                 runtime->oss.period_ptr += tmp;
1383                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1384                                 if (runtime->oss.period_ptr == 0 ||
1385                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1386                                         runtime->oss.buffer_used = 0;
1387                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1388                                         tmp = -EAGAIN;
1389                                         goto err;
1390                                 }
1391                         }
1392                 } else {
1393                         tmp = snd_pcm_oss_write2(substream,
1394                                                  (const char __force *)buf,
1395                                                  runtime->oss.period_bytes, 0);
1396                         if (tmp <= 0)
1397                                 goto err;
1398                         runtime->oss.bytes += tmp;
1399                         buf += tmp;
1400                         bytes -= tmp;
1401                         xfer += tmp;
1402                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1403                             tmp != runtime->oss.period_bytes)
1404                                 break;
1405                 }
1406         }
1407         mutex_unlock(&runtime->oss.params_lock);
1408         return xfer;
1409
1410  err:
1411         mutex_unlock(&runtime->oss.params_lock);
1412         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1413 }
1414
1415 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1416 {
1417         struct snd_pcm_runtime *runtime = substream->runtime;
1418         snd_pcm_sframes_t frames, frames1;
1419 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1420         char __user *final_dst = (char __user *)buf;
1421         if (runtime->oss.plugin_first) {
1422                 struct snd_pcm_plugin_channel *channels;
1423                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1424                 if (!in_kernel)
1425                         buf = runtime->oss.buffer;
1426                 frames = bytes / oss_frame_bytes;
1427                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1428                 if (frames1 < 0)
1429                         return frames1;
1430                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1431                 if (frames1 <= 0)
1432                         return frames1;
1433                 bytes = frames1 * oss_frame_bytes;
1434                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1435                         return -EFAULT;
1436         } else
1437 #endif
1438         {
1439                 frames = bytes_to_frames(runtime, bytes);
1440                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1441                 if (frames1 <= 0)
1442                         return frames1;
1443                 bytes = frames_to_bytes(runtime, frames1);
1444         }
1445         return bytes;
1446 }
1447
1448 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1449 {
1450         size_t xfer = 0;
1451         ssize_t tmp;
1452         struct snd_pcm_runtime *runtime = substream->runtime;
1453
1454         if (atomic_read(&substream->mmap_count))
1455                 return -ENXIO;
1456
1457         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1458                 return tmp;
1459         mutex_lock(&runtime->oss.params_lock);
1460         while (bytes > 0) {
1461                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1462                         if (runtime->oss.buffer_used == 0) {
1463                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1464                                 if (tmp <= 0)
1465                                         goto err;
1466                                 runtime->oss.bytes += tmp;
1467                                 runtime->oss.period_ptr = tmp;
1468                                 runtime->oss.buffer_used = tmp;
1469                         }
1470                         tmp = bytes;
1471                         if ((size_t) tmp > runtime->oss.buffer_used)
1472                                 tmp = runtime->oss.buffer_used;
1473                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1474                                 tmp = -EFAULT;
1475                                 goto err;
1476                         }
1477                         buf += tmp;
1478                         bytes -= tmp;
1479                         xfer += tmp;
1480                         runtime->oss.buffer_used -= tmp;
1481                 } else {
1482                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1483                                                 runtime->oss.period_bytes, 0);
1484                         if (tmp <= 0)
1485                                 goto err;
1486                         runtime->oss.bytes += tmp;
1487                         buf += tmp;
1488                         bytes -= tmp;
1489                         xfer += tmp;
1490                 }
1491         }
1492         mutex_unlock(&runtime->oss.params_lock);
1493         return xfer;
1494
1495  err:
1496         mutex_unlock(&runtime->oss.params_lock);
1497         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1498 }
1499
1500 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1501 {
1502         struct snd_pcm_substream *substream;
1503
1504         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1505         if (substream != NULL) {
1506                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1507                 substream->runtime->oss.prepare = 1;
1508         }
1509         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1510         if (substream != NULL) {
1511                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1512                 substream->runtime->oss.prepare = 1;
1513         }
1514         return 0;
1515 }
1516
1517 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1518 {
1519         struct snd_pcm_substream *substream;
1520         int err;
1521
1522         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1523         if (substream != NULL) {
1524                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1525                         return err;
1526                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1527         }
1528         /* note: all errors from the start action are ignored */
1529         /* OSS apps do not know, how to handle them */
1530         return 0;
1531 }
1532
1533 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1534 {
1535         struct snd_pcm_runtime *runtime;
1536         ssize_t result = 0;
1537         long res;
1538         wait_queue_t wait;
1539
1540         runtime = substream->runtime;
1541         init_waitqueue_entry(&wait, current);
1542         add_wait_queue(&runtime->sleep, &wait);
1543 #ifdef OSS_DEBUG
1544         printk(KERN_DEBUG "sync1: size = %li\n", size);
1545 #endif
1546         while (1) {
1547                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1548                 if (result > 0) {
1549                         runtime->oss.buffer_used = 0;
1550                         result = 0;
1551                         break;
1552                 }
1553                 if (result != 0 && result != -EAGAIN)
1554                         break;
1555                 result = 0;
1556                 set_current_state(TASK_INTERRUPTIBLE);
1557                 snd_pcm_stream_lock_irq(substream);
1558                 res = runtime->status->state;
1559                 snd_pcm_stream_unlock_irq(substream);
1560                 if (res != SNDRV_PCM_STATE_RUNNING) {
1561                         set_current_state(TASK_RUNNING);
1562                         break;
1563                 }
1564                 res = schedule_timeout(10 * HZ);
1565                 if (signal_pending(current)) {
1566                         result = -ERESTARTSYS;
1567                         break;
1568                 }
1569                 if (res == 0) {
1570                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1571                         result = -EIO;
1572                         break;
1573                 }
1574         }
1575         remove_wait_queue(&runtime->sleep, &wait);
1576         return result;
1577 }
1578
1579 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1580 {
1581         int err = 0;
1582         unsigned int saved_f_flags;
1583         struct snd_pcm_substream *substream;
1584         struct snd_pcm_runtime *runtime;
1585         snd_pcm_format_t format;
1586         unsigned long width;
1587         size_t size;
1588
1589         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1590         if (substream != NULL) {
1591                 runtime = substream->runtime;
1592                 if (atomic_read(&substream->mmap_count))
1593                         goto __direct;
1594                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1595                         return err;
1596                 format = snd_pcm_oss_format_from(runtime->oss.format);
1597                 width = snd_pcm_format_physical_width(format);
1598                 mutex_lock(&runtime->oss.params_lock);
1599                 if (runtime->oss.buffer_used > 0) {
1600 #ifdef OSS_DEBUG
1601                         printk(KERN_DEBUG "sync: buffer_used\n");
1602 #endif
1603                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1604                         snd_pcm_format_set_silence(format,
1605                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1606                                                    size);
1607                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1608                         if (err < 0) {
1609                                 mutex_unlock(&runtime->oss.params_lock);
1610                                 return err;
1611                         }
1612                 } else if (runtime->oss.period_ptr > 0) {
1613 #ifdef OSS_DEBUG
1614                         printk(KERN_DEBUG "sync: period_ptr\n");
1615 #endif
1616                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1617                         snd_pcm_format_set_silence(format,
1618                                                    runtime->oss.buffer,
1619                                                    size * 8 / width);
1620                         err = snd_pcm_oss_sync1(substream, size);
1621                         if (err < 0) {
1622                                 mutex_unlock(&runtime->oss.params_lock);
1623                                 return err;
1624                         }
1625                 }
1626                 /*
1627                  * The ALSA's period might be a bit large than OSS one.
1628                  * Fill the remain portion of ALSA period with zeros.
1629                  */
1630                 size = runtime->control->appl_ptr % runtime->period_size;
1631                 if (size > 0) {
1632                         size = runtime->period_size - size;
1633                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1634                                 size = (runtime->frame_bits * size) / 8;
1635                                 while (size > 0) {
1636                                         mm_segment_t fs;
1637                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1638                                         size -= size1;
1639                                         size1 *= 8;
1640                                         size1 /= runtime->sample_bits;
1641                                         snd_pcm_format_set_silence(runtime->format,
1642                                                                    runtime->oss.buffer,
1643                                                                    size1);
1644                                         size1 /= runtime->channels; /* frames */
1645                                         fs = snd_enter_user();
1646                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1647                                         snd_leave_user(fs);
1648                                 }
1649                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1650                                 void __user *buffers[runtime->channels];
1651                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1652                                 snd_pcm_lib_writev(substream, buffers, size);
1653                         }
1654                 }
1655                 mutex_unlock(&runtime->oss.params_lock);
1656                 /*
1657                  * finish sync: drain the buffer
1658                  */
1659               __direct:
1660                 saved_f_flags = substream->f_flags;
1661                 substream->f_flags &= ~O_NONBLOCK;
1662                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1663                 substream->f_flags = saved_f_flags;
1664                 if (err < 0)
1665                         return err;
1666                 runtime->oss.prepare = 1;
1667         }
1668
1669         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1670         if (substream != NULL) {
1671                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1672                         return err;
1673                 runtime = substream->runtime;
1674                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1675                 if (err < 0)
1676                         return err;
1677                 runtime->oss.buffer_used = 0;
1678                 runtime->oss.prepare = 1;
1679         }
1680         return 0;
1681 }
1682
1683 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1684 {
1685         int idx;
1686
1687         for (idx = 1; idx >= 0; --idx) {
1688                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1689                 struct snd_pcm_runtime *runtime;
1690                 if (substream == NULL)
1691                         continue;
1692                 runtime = substream->runtime;
1693                 if (rate < 1000)
1694                         rate = 1000;
1695                 else if (rate > 192000)
1696                         rate = 192000;
1697                 if (runtime->oss.rate != rate) {
1698                         runtime->oss.params = 1;
1699                         runtime->oss.rate = rate;
1700                 }
1701         }
1702         return snd_pcm_oss_get_rate(pcm_oss_file);
1703 }
1704
1705 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1706 {
1707         struct snd_pcm_substream *substream;
1708         int err;
1709
1710         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1711                 return err;
1712         return substream->runtime->oss.rate;
1713 }
1714
1715 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1716 {
1717         int idx;
1718         if (channels < 1)
1719                 channels = 1;
1720         if (channels > 128)
1721                 return -EINVAL;
1722         for (idx = 1; idx >= 0; --idx) {
1723                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1724                 struct snd_pcm_runtime *runtime;
1725                 if (substream == NULL)
1726                         continue;
1727                 runtime = substream->runtime;
1728                 if (runtime->oss.channels != channels) {
1729                         runtime->oss.params = 1;
1730                         runtime->oss.channels = channels;
1731                 }
1732         }
1733         return snd_pcm_oss_get_channels(pcm_oss_file);
1734 }
1735
1736 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1737 {
1738         struct snd_pcm_substream *substream;
1739         int err;
1740
1741         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1742                 return err;
1743         return substream->runtime->oss.channels;
1744 }
1745
1746 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1747 {
1748         struct snd_pcm_substream *substream;
1749         int err;
1750
1751         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1752                 return err;
1753         return substream->runtime->oss.period_bytes;
1754 }
1755
1756 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1757 {
1758         struct snd_pcm_substream *substream;
1759         int err;
1760         int direct;
1761         struct snd_pcm_hw_params *params;
1762         unsigned int formats = 0;
1763         struct snd_mask format_mask;
1764         int fmt;
1765
1766         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1767                 return err;
1768         if (atomic_read(&substream->mmap_count))
1769                 direct = 1;
1770         else
1771                 direct = substream->oss.setup.direct;
1772         if (!direct)
1773                 return AFMT_MU_LAW | AFMT_U8 |
1774                        AFMT_S16_LE | AFMT_S16_BE |
1775                        AFMT_S8 | AFMT_U16_LE |
1776                        AFMT_U16_BE |
1777                         AFMT_S32_LE | AFMT_S32_BE |
1778                         AFMT_S24_LE | AFMT_S24_BE |
1779                         AFMT_S24_PACKED;
1780         params = kmalloc(sizeof(*params), GFP_KERNEL);
1781         if (!params)
1782                 return -ENOMEM;
1783         _snd_pcm_hw_params_any(params);
1784         err = snd_pcm_hw_refine(substream, params);
1785         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1786         kfree(params);
1787         if (err < 0)
1788                 return err;
1789         for (fmt = 0; fmt < 32; ++fmt) {
1790                 if (snd_mask_test(&format_mask, fmt)) {
1791                         int f = snd_pcm_oss_format_to(fmt);
1792                         if (f >= 0)
1793                                 formats |= f;
1794                 }
1795         }
1796         return formats;
1797 }
1798
1799 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1800 {
1801         int formats, idx;
1802
1803         if (format != AFMT_QUERY) {
1804                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1805                 if (formats < 0)
1806                         return formats;
1807                 if (!(formats & format))
1808                         format = AFMT_U8;
1809                 for (idx = 1; idx >= 0; --idx) {
1810                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1811                         struct snd_pcm_runtime *runtime;
1812                         if (substream == NULL)
1813                                 continue;
1814                         runtime = substream->runtime;
1815                         if (runtime->oss.format != format) {
1816                                 runtime->oss.params = 1;
1817                                 runtime->oss.format = format;
1818                         }
1819                 }
1820         }
1821         return snd_pcm_oss_get_format(pcm_oss_file);
1822 }
1823
1824 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1825 {
1826         struct snd_pcm_substream *substream;
1827         int err;
1828
1829         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1830                 return err;
1831         return substream->runtime->oss.format;
1832 }
1833
1834 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1835 {
1836         struct snd_pcm_runtime *runtime;
1837
1838         if (substream == NULL)
1839                 return 0;
1840         runtime = substream->runtime;
1841         if (subdivide == 0) {
1842                 subdivide = runtime->oss.subdivision;
1843                 if (subdivide == 0)
1844                         subdivide = 1;
1845                 return subdivide;
1846         }
1847         if (runtime->oss.subdivision || runtime->oss.fragshift)
1848                 return -EINVAL;
1849         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1850             subdivide != 8 && subdivide != 16)
1851                 return -EINVAL;
1852         runtime->oss.subdivision = subdivide;
1853         runtime->oss.params = 1;
1854         return subdivide;
1855 }
1856
1857 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1858 {
1859         int err = -EINVAL, idx;
1860
1861         for (idx = 1; idx >= 0; --idx) {
1862                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1863                 if (substream == NULL)
1864                         continue;
1865                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1866                         return err;
1867         }
1868         return err;
1869 }
1870
1871 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1872 {
1873         struct snd_pcm_runtime *runtime;
1874
1875         if (substream == NULL)
1876                 return 0;
1877         runtime = substream->runtime;
1878         if (runtime->oss.subdivision || runtime->oss.fragshift)
1879                 return -EINVAL;
1880         runtime->oss.fragshift = val & 0xffff;
1881         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1882         if (runtime->oss.fragshift < 4)         /* < 16 */
1883                 runtime->oss.fragshift = 4;
1884         if (runtime->oss.maxfrags < 2)
1885                 runtime->oss.maxfrags = 2;
1886         runtime->oss.params = 1;
1887         return 0;
1888 }
1889
1890 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1891 {
1892         int err = -EINVAL, idx;
1893
1894         for (idx = 1; idx >= 0; --idx) {
1895                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1896                 if (substream == NULL)
1897                         continue;
1898                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1899                         return err;
1900         }
1901         return err;
1902 }
1903
1904 static int snd_pcm_oss_nonblock(struct file * file)
1905 {
1906         spin_lock(&file->f_lock);
1907         file->f_flags |= O_NONBLOCK;
1908         spin_unlock(&file->f_lock);
1909         return 0;
1910 }
1911
1912 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1913 {
1914
1915         if (substream == NULL) {
1916                 res &= ~DSP_CAP_DUPLEX;
1917                 return res;
1918         }
1919 #ifdef DSP_CAP_MULTI
1920         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1921                 if (substream->pstr->substream_count > 1)
1922                         res |= DSP_CAP_MULTI;
1923 #endif
1924         /* DSP_CAP_REALTIME is set all times: */
1925         /* all ALSA drivers can return actual pointer in ring buffer */
1926 #if defined(DSP_CAP_REALTIME) && 0
1927         {
1928                 struct snd_pcm_runtime *runtime = substream->runtime;
1929                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1930                         res &= ~DSP_CAP_REALTIME;
1931         }
1932 #endif
1933         return res;
1934 }
1935
1936 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1937 {
1938         int result, idx;
1939
1940         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1941         for (idx = 0; idx < 2; idx++) {
1942                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1943                 result = snd_pcm_oss_get_caps1(substream, result);
1944         }
1945         result |= 0x0001;       /* revision - same as SB AWE 64 */
1946         return result;
1947 }
1948
1949 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1950 {
1951         struct snd_pcm_runtime *runtime = substream->runtime;
1952         snd_pcm_uframes_t appl_ptr;
1953         appl_ptr = hw_ptr + runtime->buffer_size;
1954         appl_ptr %= runtime->boundary;
1955         runtime->control->appl_ptr = appl_ptr;
1956 }
1957
1958 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1959 {
1960         struct snd_pcm_runtime *runtime;
1961         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1962         int err, cmd;
1963
1964 #ifdef OSS_DEBUG
1965         printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1966 #endif
1967
1968         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1969         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1970
1971         if (psubstream) {
1972                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1973                         return err;
1974         }
1975         if (csubstream) {
1976                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1977                         return err;
1978         }
1979         if (psubstream) {
1980                 runtime = psubstream->runtime;
1981                 if (trigger & PCM_ENABLE_OUTPUT) {
1982                         if (runtime->oss.trigger)
1983                                 goto _skip1;
1984                         if (atomic_read(&psubstream->mmap_count))
1985                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1986                         runtime->oss.trigger = 1;
1987                         runtime->start_threshold = 1;
1988                         cmd = SNDRV_PCM_IOCTL_START;
1989                 } else {
1990                         if (!runtime->oss.trigger)
1991                                 goto _skip1;
1992                         runtime->oss.trigger = 0;
1993                         runtime->start_threshold = runtime->boundary;
1994                         cmd = SNDRV_PCM_IOCTL_DROP;
1995                         runtime->oss.prepare = 1;
1996                 }
1997                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1998                 if (err < 0)
1999                         return err;
2000         }
2001  _skip1:
2002         if (csubstream) {
2003                 runtime = csubstream->runtime;
2004                 if (trigger & PCM_ENABLE_INPUT) {
2005                         if (runtime->oss.trigger)
2006                                 goto _skip2;
2007                         runtime->oss.trigger = 1;
2008                         runtime->start_threshold = 1;
2009                         cmd = SNDRV_PCM_IOCTL_START;
2010                 } else {
2011                         if (!runtime->oss.trigger)
2012                                 goto _skip2;
2013                         runtime->oss.trigger = 0;
2014                         runtime->start_threshold = runtime->boundary;
2015                         cmd = SNDRV_PCM_IOCTL_DROP;
2016                         runtime->oss.prepare = 1;
2017                 }
2018                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2019                 if (err < 0)
2020                         return err;
2021         }
2022  _skip2:
2023         return 0;
2024 }
2025
2026 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2027 {
2028         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2029         int result = 0;
2030
2031         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2032         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2033         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2034                 result |= PCM_ENABLE_OUTPUT;
2035         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2036                 result |= PCM_ENABLE_INPUT;
2037         return result;
2038 }
2039
2040 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2041 {
2042         struct snd_pcm_substream *substream;
2043         struct snd_pcm_runtime *runtime;
2044         snd_pcm_sframes_t delay;
2045         int err;
2046
2047         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2048         if (substream == NULL)
2049                 return -EINVAL;
2050         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2051                 return err;
2052         runtime = substream->runtime;
2053         if (runtime->oss.params || runtime->oss.prepare)
2054                 return 0;
2055         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2056         if (err == -EPIPE)
2057                 delay = 0;      /* hack for broken OSS applications */
2058         else if (err < 0)
2059                 return err;
2060         return snd_pcm_oss_bytes(substream, delay);
2061 }
2062
2063 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2064 {
2065         struct snd_pcm_substream *substream;
2066         struct snd_pcm_runtime *runtime;
2067         snd_pcm_sframes_t delay;
2068         int fixup;
2069         struct count_info info;
2070         int err;
2071
2072         if (_info == NULL)
2073                 return -EFAULT;
2074         substream = pcm_oss_file->streams[stream];
2075         if (substream == NULL)
2076                 return -EINVAL;
2077         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2078                 return err;
2079         runtime = substream->runtime;
2080         if (runtime->oss.params || runtime->oss.prepare) {
2081                 memset(&info, 0, sizeof(info));
2082                 if (copy_to_user(_info, &info, sizeof(info)))
2083                         return -EFAULT;
2084                 return 0;
2085         }
2086         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2087                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2088                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2089                         err = 0;
2090                         delay = 0;
2091                         fixup = 0;
2092                 } else {
2093                         fixup = runtime->oss.buffer_used;
2094                 }
2095         } else {
2096                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2097                 fixup = -runtime->oss.buffer_used;
2098         }
2099         if (err < 0)
2100                 return err;
2101         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2102         if (atomic_read(&substream->mmap_count)) {
2103                 snd_pcm_sframes_t n;
2104                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2105                 if (n < 0)
2106                         n += runtime->boundary;
2107                 info.blocks = n / runtime->period_size;
2108                 runtime->oss.prev_hw_ptr_interrupt = delay;
2109                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2110                         snd_pcm_oss_simulate_fill(substream, delay);
2111                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2112         } else {
2113                 delay = snd_pcm_oss_bytes(substream, delay);
2114                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2115                         if (substream->oss.setup.buggyptr)
2116                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2117                         else
2118                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2119                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2120                 } else {
2121                         delay += fixup;
2122                         info.blocks = delay / runtime->oss.period_bytes;
2123                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2124                 }
2125         }
2126         if (copy_to_user(_info, &info, sizeof(info)))
2127                 return -EFAULT;
2128         return 0;
2129 }
2130
2131 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2132 {
2133         struct snd_pcm_substream *substream;
2134         struct snd_pcm_runtime *runtime;
2135         snd_pcm_sframes_t avail;
2136         int fixup;
2137         struct audio_buf_info info;
2138         int err;
2139
2140         if (_info == NULL)
2141                 return -EFAULT;
2142         substream = pcm_oss_file->streams[stream];
2143         if (substream == NULL)
2144                 return -EINVAL;
2145         runtime = substream->runtime;
2146
2147         if (runtime->oss.params &&
2148             (err = snd_pcm_oss_change_params(substream)) < 0)
2149                 return err;
2150
2151         info.fragsize = runtime->oss.period_bytes;
2152         info.fragstotal = runtime->periods;
2153         if (runtime->oss.prepare) {
2154                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2155                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2156                         info.fragments = runtime->oss.periods;
2157                 } else {
2158                         info.bytes = 0;
2159                         info.fragments = 0;
2160                 }
2161         } else {
2162                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2163                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2164                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2165                                 avail = runtime->buffer_size;
2166                                 err = 0;
2167                                 fixup = 0;
2168                         } else {
2169                                 avail = runtime->buffer_size - avail;
2170                                 fixup = -runtime->oss.buffer_used;
2171                         }
2172                 } else {
2173                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2174                         fixup = runtime->oss.buffer_used;
2175                 }
2176                 if (err < 0)
2177                         return err;
2178                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2179                 info.fragments = info.bytes / runtime->oss.period_bytes;
2180         }
2181
2182 #ifdef OSS_DEBUG
2183         printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2184                "fragstotal = %i, fragsize = %i\n",
2185                info.bytes, info.fragments, info.fragstotal, info.fragsize);
2186 #endif
2187         if (copy_to_user(_info, &info, sizeof(info)))
2188                 return -EFAULT;
2189         return 0;
2190 }
2191
2192 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2193 {
2194         // it won't be probably implemented
2195         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2196         return -EINVAL;
2197 }
2198
2199 static const char *strip_task_path(const char *path)
2200 {
2201         const char *ptr, *ptrl = NULL;
2202         for (ptr = path; *ptr; ptr++) {
2203                 if (*ptr == '/')
2204                         ptrl = ptr + 1;
2205         }
2206         return ptrl;
2207 }
2208
2209 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2210                                       const char *task_name,
2211                                       struct snd_pcm_oss_setup *rsetup)
2212 {
2213         struct snd_pcm_oss_setup *setup;
2214
2215         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2216         do {
2217                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2218                      setup = setup->next) {
2219                         if (!strcmp(setup->task_name, task_name))
2220                                 goto out;
2221                 }
2222         } while ((task_name = strip_task_path(task_name)) != NULL);
2223  out:
2224         if (setup)
2225                 *rsetup = *setup;
2226         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2227 }
2228
2229 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2230 {
2231         struct snd_pcm_runtime *runtime;
2232         runtime = substream->runtime;
2233         vfree(runtime->oss.buffer);
2234         runtime->oss.buffer = NULL;
2235 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2236         snd_pcm_oss_plugin_clear(substream);
2237 #endif
2238         substream->oss.oss = 0;
2239 }
2240
2241 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2242                                        struct snd_pcm_oss_setup *setup,
2243                                        int minor)
2244 {
2245         struct snd_pcm_runtime *runtime;
2246
2247         substream->oss.oss = 1;
2248         substream->oss.setup = *setup;
2249         if (setup->nonblock)
2250                 substream->f_flags |= O_NONBLOCK;
2251         else if (setup->block)
2252                 substream->f_flags &= ~O_NONBLOCK;
2253         runtime = substream->runtime;
2254         runtime->oss.params = 1;
2255         runtime->oss.trigger = 1;
2256         runtime->oss.rate = 8000;
2257         mutex_init(&runtime->oss.params_lock);
2258         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2259         case SNDRV_MINOR_OSS_PCM_8:
2260                 runtime->oss.format = AFMT_U8;
2261                 break;
2262         case SNDRV_MINOR_OSS_PCM_16:
2263                 runtime->oss.format = AFMT_S16_LE;
2264                 break;
2265         default:
2266                 runtime->oss.format = AFMT_MU_LAW;
2267         }
2268         runtime->oss.channels = 1;
2269         runtime->oss.fragshift = 0;
2270         runtime->oss.maxfrags = 0;
2271         runtime->oss.subdivision = 0;
2272         substream->pcm_release = snd_pcm_oss_release_substream;
2273 }
2274
2275 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2276 {
2277         int cidx;
2278         if (!pcm_oss_file)
2279                 return 0;
2280         for (cidx = 0; cidx < 2; ++cidx) {
2281                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2282                 if (substream)
2283                         snd_pcm_release_substream(substream);
2284         }
2285         kfree(pcm_oss_file);
2286         return 0;
2287 }
2288
2289 static int snd_pcm_oss_open_file(struct file *file,
2290                                  struct snd_pcm *pcm,
2291                                  struct snd_pcm_oss_file **rpcm_oss_file,
2292                                  int minor,
2293                                  struct snd_pcm_oss_setup *setup)
2294 {
2295         int idx, err;
2296         struct snd_pcm_oss_file *pcm_oss_file;
2297         struct snd_pcm_substream *substream;
2298         fmode_t f_mode = file->f_mode;
2299
2300         if (rpcm_oss_file)
2301                 *rpcm_oss_file = NULL;
2302
2303         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2304         if (pcm_oss_file == NULL)
2305                 return -ENOMEM;
2306
2307         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2308             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2309                 f_mode = FMODE_WRITE;
2310
2311         file->f_flags &= ~O_APPEND;
2312         for (idx = 0; idx < 2; idx++) {
2313                 if (setup[idx].disable)
2314                         continue;
2315                 if (! pcm->streams[idx].substream_count)
2316                         continue; /* no matching substream */
2317                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2318                         if (! (f_mode & FMODE_WRITE))
2319                                 continue;
2320                 } else {
2321                         if (! (f_mode & FMODE_READ))
2322                                 continue;
2323                 }
2324                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2325                 if (err < 0) {
2326                         snd_pcm_oss_release_file(pcm_oss_file);
2327                         return err;
2328                 }
2329
2330                 pcm_oss_file->streams[idx] = substream;
2331                 substream->file = pcm_oss_file;
2332                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2333         }
2334
2335         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2336                 snd_pcm_oss_release_file(pcm_oss_file);
2337                 return -EINVAL;
2338         }
2339
2340         file->private_data = pcm_oss_file;
2341         if (rpcm_oss_file)
2342                 *rpcm_oss_file = pcm_oss_file;
2343         return 0;
2344 }
2345
2346
2347 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2348 {
2349         unsigned int idx;
2350
2351         if (snd_BUG_ON(!task || !name || size < 2))
2352                 return -EINVAL;
2353         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2354                 name[idx] = task->comm[idx];
2355         name[idx] = '\0';
2356         return 0;
2357 }
2358
2359 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2360 {
2361         int err;
2362         char task_name[32];
2363         struct snd_pcm *pcm;
2364         struct snd_pcm_oss_file *pcm_oss_file;
2365         struct snd_pcm_oss_setup setup[2];
2366         int nonblock;
2367         wait_queue_t wait;
2368
2369         pcm = snd_lookup_oss_minor_data(iminor(inode),
2370                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2371         if (pcm == NULL) {
2372                 err = -ENODEV;
2373                 goto __error1;
2374         }
2375         err = snd_card_file_add(pcm->card, file);
2376         if (err < 0)
2377                 goto __error1;
2378         if (!try_module_get(pcm->card->module)) {
2379                 err = -EFAULT;
2380                 goto __error2;
2381         }
2382         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2383                 err = -EFAULT;
2384                 goto __error;
2385         }
2386         memset(setup, 0, sizeof(setup));
2387         if (file->f_mode & FMODE_WRITE)
2388                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2389                                            task_name, &setup[0]);
2390         if (file->f_mode & FMODE_READ)
2391                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2392                                            task_name, &setup[1]);
2393
2394         nonblock = !!(file->f_flags & O_NONBLOCK);
2395         if (!nonblock)
2396                 nonblock = nonblock_open;
2397
2398         init_waitqueue_entry(&wait, current);
2399         add_wait_queue(&pcm->open_wait, &wait);
2400         mutex_lock(&pcm->open_mutex);
2401         while (1) {
2402                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2403                                             iminor(inode), setup);
2404                 if (err >= 0)
2405                         break;
2406                 if (err == -EAGAIN) {
2407                         if (nonblock) {
2408                                 err = -EBUSY;
2409                                 break;
2410                         }
2411                 } else
2412                         break;
2413                 set_current_state(TASK_INTERRUPTIBLE);
2414                 mutex_unlock(&pcm->open_mutex);
2415                 schedule();
2416                 mutex_lock(&pcm->open_mutex);
2417                 if (signal_pending(current)) {
2418                         err = -ERESTARTSYS;
2419                         break;
2420                 }
2421         }
2422         remove_wait_queue(&pcm->open_wait, &wait);
2423         mutex_unlock(&pcm->open_mutex);
2424         if (err < 0)
2425                 goto __error;
2426         return err;
2427
2428       __error:
2429         module_put(pcm->card->module);
2430       __error2:
2431         snd_card_file_remove(pcm->card, file);
2432       __error1:
2433         return err;
2434 }
2435
2436 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2437 {
2438         struct snd_pcm *pcm;
2439         struct snd_pcm_substream *substream;
2440         struct snd_pcm_oss_file *pcm_oss_file;
2441
2442         pcm_oss_file = file->private_data;
2443         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2444         if (substream == NULL)
2445                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2446         if (snd_BUG_ON(!substream))
2447                 return -ENXIO;
2448         pcm = substream->pcm;
2449         if (!pcm->card->shutdown)
2450                 snd_pcm_oss_sync(pcm_oss_file);
2451         mutex_lock(&pcm->open_mutex);
2452         snd_pcm_oss_release_file(pcm_oss_file);
2453         mutex_unlock(&pcm->open_mutex);
2454         wake_up(&pcm->open_wait);
2455         module_put(pcm->card->module);
2456         snd_card_file_remove(pcm->card, file);
2457         return 0;
2458 }
2459
2460 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2461 {
2462         struct snd_pcm_oss_file *pcm_oss_file;
2463         int __user *p = (int __user *)arg;
2464         int res;
2465
2466         pcm_oss_file = file->private_data;
2467         if (cmd == OSS_GETVERSION)
2468                 return put_user(SNDRV_OSS_VERSION, p);
2469         if (cmd == OSS_ALSAEMULVER)
2470                 return put_user(1, p);
2471 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2472         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2473                 struct snd_pcm_substream *substream;
2474                 int idx;
2475                 for (idx = 0; idx < 2; ++idx) {
2476                         substream = pcm_oss_file->streams[idx];
2477                         if (substream != NULL)
2478                                 break;
2479                 }
2480                 if (snd_BUG_ON(idx >= 2))
2481                         return -ENXIO;
2482                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2483         }
2484 #endif
2485         if (((cmd >> 8) & 0xff) != 'P')
2486                 return -EINVAL;
2487 #ifdef OSS_DEBUG
2488         printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2489 #endif
2490         switch (cmd) {
2491         case SNDCTL_DSP_RESET:
2492                 return snd_pcm_oss_reset(pcm_oss_file);
2493         case SNDCTL_DSP_SYNC:
2494                 return snd_pcm_oss_sync(pcm_oss_file);
2495         case SNDCTL_DSP_SPEED:
2496                 if (get_user(res, p))
2497                         return -EFAULT;
2498                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2499                         return res;
2500                 return put_user(res, p);
2501         case SOUND_PCM_READ_RATE:
2502                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2503                 if (res < 0)
2504                         return res;
2505                 return put_user(res, p);
2506         case SNDCTL_DSP_STEREO:
2507                 if (get_user(res, p))
2508                         return -EFAULT;
2509                 res = res > 0 ? 2 : 1;
2510                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2511                         return res;
2512                 return put_user(--res, p);
2513         case SNDCTL_DSP_GETBLKSIZE:
2514                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2515                 if (res < 0)
2516                         return res;
2517                 return put_user(res, p);
2518         case SNDCTL_DSP_SETFMT:
2519                 if (get_user(res, p))
2520                         return -EFAULT;
2521                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2522                 if (res < 0)
2523                         return res;
2524                 return put_user(res, p);
2525         case SOUND_PCM_READ_BITS:
2526                 res = snd_pcm_oss_get_format(pcm_oss_file);
2527                 if (res < 0)
2528                         return res;
2529                 return put_user(res, p);
2530         case SNDCTL_DSP_CHANNELS:
2531                 if (get_user(res, p))
2532                         return -EFAULT;
2533                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2534                 if (res < 0)
2535                         return res;
2536                 return put_user(res, p);
2537         case SOUND_PCM_READ_CHANNELS:
2538                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2539                 if (res < 0)
2540                         return res;
2541                 return put_user(res, p);
2542         case SOUND_PCM_WRITE_FILTER:
2543         case SOUND_PCM_READ_FILTER:
2544                 return -EIO;
2545         case SNDCTL_DSP_POST:
2546                 return snd_pcm_oss_post(pcm_oss_file);
2547         case SNDCTL_DSP_SUBDIVIDE:
2548                 if (get_user(res, p))
2549                         return -EFAULT;
2550                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2551                 if (res < 0)
2552                         return res;
2553                 return put_user(res, p);
2554         case SNDCTL_DSP_SETFRAGMENT:
2555                 if (get_user(res, p))
2556                         return -EFAULT;
2557                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2558         case SNDCTL_DSP_GETFMTS:
2559                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2560                 if (res < 0)
2561                         return res;
2562                 return put_user(res, p);
2563         case SNDCTL_DSP_GETOSPACE:
2564         case SNDCTL_DSP_GETISPACE:
2565                 return snd_pcm_oss_get_space(pcm_oss_file,
2566                         cmd == SNDCTL_DSP_GETISPACE ?
2567                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2568                         (struct audio_buf_info __user *) arg);
2569         case SNDCTL_DSP_NONBLOCK:
2570                 return snd_pcm_oss_nonblock(file);
2571         case SNDCTL_DSP_GETCAPS:
2572                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2573                 if (res < 0)
2574                         return res;
2575                 return put_user(res, p);
2576         case SNDCTL_DSP_GETTRIGGER:
2577                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2578                 if (res < 0)
2579                         return res;
2580                 return put_user(res, p);
2581         case SNDCTL_DSP_SETTRIGGER:
2582                 if (get_user(res, p))
2583                         return -EFAULT;
2584                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2585         case SNDCTL_DSP_GETIPTR:
2586         case SNDCTL_DSP_GETOPTR:
2587                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2588                         cmd == SNDCTL_DSP_GETIPTR ?
2589                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2590                         (struct count_info __user *) arg);
2591         case SNDCTL_DSP_MAPINBUF:
2592         case SNDCTL_DSP_MAPOUTBUF:
2593                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2594                         cmd == SNDCTL_DSP_MAPINBUF ?
2595                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2596                         (struct buffmem_desc __user *) arg);
2597         case SNDCTL_DSP_SETSYNCRO:
2598                 /* stop DMA now.. */
2599                 return 0;
2600         case SNDCTL_DSP_SETDUPLEX:
2601                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2602                         return 0;
2603                 return -EIO;
2604         case SNDCTL_DSP_GETODELAY:
2605                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2606                 if (res < 0) {
2607                         /* it's for sure, some broken apps don't check for error codes */
2608                         put_user(0, p);
2609                         return res;
2610                 }
2611                 return put_user(res, p);
2612         case SNDCTL_DSP_PROFILE:
2613                 return 0;       /* silently ignore */
2614         default:
2615                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2616         }
2617         return -EINVAL;
2618 }
2619
2620 #ifdef CONFIG_COMPAT
2621 /* all compatible */
2622 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2623 #else
2624 #define snd_pcm_oss_ioctl_compat        NULL
2625 #endif
2626
2627 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2628 {
2629         struct snd_pcm_oss_file *pcm_oss_file;
2630         struct snd_pcm_substream *substream;
2631
2632         pcm_oss_file = file->private_data;
2633         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2634         if (substream == NULL)
2635                 return -ENXIO;
2636         substream->f_flags = file->f_flags & O_NONBLOCK;
2637 #ifndef OSS_DEBUG
2638         return snd_pcm_oss_read1(substream, buf, count);
2639 #else
2640         {
2641                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2642                 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2643                        "(returned %li bytes)\n", (long)count, (long)res);
2644                 return res;
2645         }
2646 #endif
2647 }
2648
2649 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2650 {
2651         struct snd_pcm_oss_file *pcm_oss_file;
2652         struct snd_pcm_substream *substream;
2653         long result;
2654
2655         pcm_oss_file = file->private_data;
2656         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2657         if (substream == NULL)
2658                 return -ENXIO;
2659         substream->f_flags = file->f_flags & O_NONBLOCK;
2660         result = snd_pcm_oss_write1(substream, buf, count);
2661 #ifdef OSS_DEBUG
2662         printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2663                (long)count, (long)result);
2664 #endif
2665         return result;
2666 }
2667
2668 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2669 {
2670         struct snd_pcm_runtime *runtime = substream->runtime;
2671         if (atomic_read(&substream->mmap_count))
2672                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2673         else
2674                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2675 }
2676
2677 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2678 {
2679         struct snd_pcm_runtime *runtime = substream->runtime;
2680         if (atomic_read(&substream->mmap_count))
2681                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2682         else
2683                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2684 }
2685
2686 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2687 {
2688         struct snd_pcm_oss_file *pcm_oss_file;
2689         unsigned int mask;
2690         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2691
2692         pcm_oss_file = file->private_data;
2693
2694         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2695         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2696
2697         mask = 0;
2698         if (psubstream != NULL) {
2699                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2700                 poll_wait(file, &runtime->sleep, wait);
2701                 snd_pcm_stream_lock_irq(psubstream);
2702                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2703                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2704                      snd_pcm_oss_playback_ready(psubstream)))
2705                         mask |= POLLOUT | POLLWRNORM;
2706                 snd_pcm_stream_unlock_irq(psubstream);
2707         }
2708         if (csubstream != NULL) {
2709                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2710                 snd_pcm_state_t ostate;
2711                 poll_wait(file, &runtime->sleep, wait);
2712                 snd_pcm_stream_lock_irq(csubstream);
2713                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2714                     snd_pcm_oss_capture_ready(csubstream))
2715                         mask |= POLLIN | POLLRDNORM;
2716                 snd_pcm_stream_unlock_irq(csubstream);
2717                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2718                         struct snd_pcm_oss_file ofile;
2719                         memset(&ofile, 0, sizeof(ofile));
2720                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2721                         runtime->oss.trigger = 0;
2722                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2723                 }
2724         }
2725
2726         return mask;
2727 }
2728
2729 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2730 {
2731         struct snd_pcm_oss_file *pcm_oss_file;
2732         struct snd_pcm_substream *substream = NULL;
2733         struct snd_pcm_runtime *runtime;
2734         int err;
2735
2736 #ifdef OSS_DEBUG
2737         printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2738 #endif
2739         pcm_oss_file = file->private_data;
2740         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2741         case VM_READ | VM_WRITE:
2742                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2743                 if (substream)
2744                         break;
2745                 /* Fall through */
2746         case VM_READ:
2747                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2748                 break;
2749         case VM_WRITE:
2750                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2751                 break;
2752         default:
2753                 return -EINVAL;
2754         }
2755         /* set VM_READ access as well to fix memset() routines that do
2756            reads before writes (to improve performance) */
2757         area->vm_flags |= VM_READ;
2758         if (substream == NULL)
2759                 return -ENXIO;
2760         runtime = substream->runtime;
2761         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2762                 return -EIO;
2763         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2764                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2765         else
2766                 return -EIO;
2767
2768         if (runtime->oss.params) {
2769                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2770                         return err;
2771         }
2772 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2773         if (runtime->oss.plugin_first != NULL)
2774                 return -EIO;
2775 #endif
2776
2777         if (area->vm_pgoff != 0)
2778                 return -EINVAL;
2779
2780         err = snd_pcm_mmap_data(substream, file, area);
2781         if (err < 0)
2782                 return err;
2783         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2784         runtime->silence_threshold = 0;
2785         runtime->silence_size = 0;
2786 #ifdef OSS_DEBUG
2787         printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2788                runtime->oss.mmap_bytes);
2789 #endif
2790         /* In mmap mode we never stop */
2791         runtime->stop_threshold = runtime->boundary;
2792
2793         return 0;
2794 }
2795
2796 #ifdef CONFIG_SND_VERBOSE_PROCFS
2797 /*
2798  *  /proc interface
2799  */
2800
2801 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2802                                   struct snd_info_buffer *buffer)
2803 {
2804         struct snd_pcm_str *pstr = entry->private_data;
2805         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2806         mutex_lock(&pstr->oss.setup_mutex);
2807         while (setup) {
2808                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2809                             setup->task_name,
2810                             setup->periods,
2811                             setup->period_size,
2812                             setup->disable ? " disable" : "",
2813                             setup->direct ? " direct" : "",
2814                             setup->block ? " block" : "",
2815                             setup->nonblock ? " non-block" : "",
2816                             setup->partialfrag ? " partial-frag" : "",
2817                             setup->nosilence ? " no-silence" : "");
2818                 setup = setup->next;
2819         }
2820         mutex_unlock(&pstr->oss.setup_mutex);
2821 }
2822
2823 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2824 {
2825         struct snd_pcm_oss_setup *setup, *setupn;
2826
2827         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2828              setup; setup = setupn) {
2829                 setupn = setup->next;
2830                 kfree(setup->task_name);
2831                 kfree(setup);
2832         }
2833         pstr->oss.setup_list = NULL;
2834 }
2835
2836 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2837                                    struct snd_info_buffer *buffer)
2838 {
2839         struct snd_pcm_str *pstr = entry->private_data;
2840         char line[128], str[32], task_name[32], *ptr;
2841         int idx1;
2842         struct snd_pcm_oss_setup *setup, *setup1, template;
2843
2844         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2845                 mutex_lock(&pstr->oss.setup_mutex);
2846                 memset(&template, 0, sizeof(template));
2847                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2848                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2849                         snd_pcm_oss_proc_free_setup_list(pstr);
2850                         mutex_unlock(&pstr->oss.setup_mutex);
2851                         continue;
2852                 }
2853                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2854                         if (!strcmp(setup->task_name, task_name)) {
2855                                 template = *setup;
2856                                 break;
2857                         }
2858                 }
2859                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2860                 template.periods = simple_strtoul(str, NULL, 10);
2861                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2862                 template.period_size = simple_strtoul(str, NULL, 10);
2863                 for (idx1 = 31; idx1 >= 0; idx1--)
2864                         if (template.period_size & (1 << idx1))
2865                                 break;
2866                 for (idx1--; idx1 >= 0; idx1--)
2867                         template.period_size &= ~(1 << idx1);
2868                 do {
2869                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2870                         if (!strcmp(str, "disable")) {
2871                                 template.disable = 1;
2872                         } else if (!strcmp(str, "direct")) {
2873                                 template.direct = 1;
2874                         } else if (!strcmp(str, "block")) {
2875                                 template.block = 1;
2876                         } else if (!strcmp(str, "non-block")) {
2877                                 template.nonblock = 1;
2878                         } else if (!strcmp(str, "partial-frag")) {
2879                                 template.partialfrag = 1;
2880                         } else if (!strcmp(str, "no-silence")) {
2881                                 template.nosilence = 1;
2882                         } else if (!strcmp(str, "buggy-ptr")) {
2883                                 template.buggyptr = 1;
2884                         }
2885                 } while (*str);
2886                 if (setup == NULL) {
2887                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2888                         if (! setup) {
2889                                 buffer->error = -ENOMEM;
2890                                 mutex_unlock(&pstr->oss.setup_mutex);
2891                                 return;
2892                         }
2893                         if (pstr->oss.setup_list == NULL)
2894                                 pstr->oss.setup_list = setup;
2895                         else {
2896                                 for (setup1 = pstr->oss.setup_list;
2897                                      setup1->next; setup1 = setup1->next);
2898                                 setup1->next = setup;
2899                         }
2900                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2901                         if (! template.task_name) {
2902                                 kfree(setup);
2903                                 buffer->error = -ENOMEM;
2904                                 mutex_unlock(&pstr->oss.setup_mutex);
2905                                 return;
2906                         }
2907                 }
2908                 *setup = template;
2909                 mutex_unlock(&pstr->oss.setup_mutex);
2910         }
2911 }
2912
2913 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2914 {
2915         int stream;
2916         for (stream = 0; stream < 2; ++stream) {
2917                 struct snd_info_entry *entry;
2918                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2919                 if (pstr->substream_count == 0)
2920                         continue;
2921                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2922                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2923                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2924                         entry->c.text.read = snd_pcm_oss_proc_read;
2925                         entry->c.text.write = snd_pcm_oss_proc_write;
2926                         entry->private_data = pstr;
2927                         if (snd_info_register(entry) < 0) {
2928                                 snd_info_free_entry(entry);
2929                                 entry = NULL;
2930                         }
2931                 }
2932                 pstr->oss.proc_entry = entry;
2933         }
2934 }
2935
2936 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2937 {
2938         int stream;
2939         for (stream = 0; stream < 2; ++stream) {
2940                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2941                 snd_info_free_entry(pstr->oss.proc_entry);
2942                 pstr->oss.proc_entry = NULL;
2943                 snd_pcm_oss_proc_free_setup_list(pstr);
2944         }
2945 }
2946 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2947 #define snd_pcm_oss_proc_init(pcm)
2948 #define snd_pcm_oss_proc_done(pcm)
2949 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2950
2951 /*
2952  *  ENTRY functions
2953  */
2954
2955 static const struct file_operations snd_pcm_oss_f_reg =
2956 {
2957         .owner =        THIS_MODULE,
2958         .read =         snd_pcm_oss_read,
2959         .write =        snd_pcm_oss_write,
2960         .open =         snd_pcm_oss_open,
2961         .release =      snd_pcm_oss_release,
2962         .poll =         snd_pcm_oss_poll,
2963         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2964         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2965         .mmap =         snd_pcm_oss_mmap,
2966 };
2967
2968 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2969 {
2970         char name[128];
2971         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2972         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2973                                     pcm->card, index, &snd_pcm_oss_f_reg,
2974                                     pcm, name) < 0) {
2975                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2976                            pcm->card->number, pcm->device);
2977         }
2978 }
2979
2980 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2981 {
2982         pcm->oss.reg = 0;
2983         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2984                 char name[128];
2985                 int duplex;
2986                 register_oss_dsp(pcm, 0);
2987                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2988                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2989                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2990                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2991 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2992                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2993                                       pcm->card->number,
2994                                       name);
2995 #endif
2996                 pcm->oss.reg++;
2997                 pcm->oss.reg_mask |= 1;
2998         }
2999         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3000                 register_oss_dsp(pcm, 1);
3001                 pcm->oss.reg++;
3002                 pcm->oss.reg_mask |= 2;
3003         }
3004
3005         if (pcm->oss.reg)
3006                 snd_pcm_oss_proc_init(pcm);
3007
3008         return 0;
3009 }
3010
3011 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3012 {
3013         if (pcm->oss.reg) {
3014                 if (pcm->oss.reg_mask & 1) {
3015                         pcm->oss.reg_mask &= ~1;
3016                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3017                                                   pcm->card, 0);
3018                 }
3019                 if (pcm->oss.reg_mask & 2) {
3020                         pcm->oss.reg_mask &= ~2;
3021                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3022                                                   pcm->card, 1);
3023                 }
3024                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3025 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3026                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3027 #endif
3028                 }
3029                 pcm->oss.reg = 0;
3030         }
3031         return 0;
3032 }
3033
3034 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3035 {
3036         snd_pcm_oss_disconnect_minor(pcm);
3037         snd_pcm_oss_proc_done(pcm);
3038         return 0;
3039 }
3040
3041 static struct snd_pcm_notify snd_pcm_oss_notify =
3042 {
3043         .n_register =   snd_pcm_oss_register_minor,
3044         .n_disconnect = snd_pcm_oss_disconnect_minor,
3045         .n_unregister = snd_pcm_oss_unregister_minor,
3046 };
3047
3048 static int __init alsa_pcm_oss_init(void)
3049 {
3050         int i;
3051         int err;
3052
3053         /* check device map table */
3054         for (i = 0; i < SNDRV_CARDS; i++) {
3055                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3056                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3057                                    i, dsp_map[i]);
3058                         dsp_map[i] = 0;
3059                 }
3060                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3061                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3062                                    i, adsp_map[i]);
3063                         adsp_map[i] = 1;
3064                 }
3065         }
3066         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3067                 return err;
3068         return 0;
3069 }
3070
3071 static void __exit alsa_pcm_oss_exit(void)
3072 {
3073         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3074 }
3075
3076 module_init(alsa_pcm_oss_init)
3077 module_exit(alsa_pcm_oss_exit)