git.oblomov.eu Git - linux-2.6/blob - 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         file->f_flags |= O_NONBLOCK;
1907         return 0;
1908 }
1909
1910 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1911 {
1912
1913         if (substream == NULL) {
1914                 res &= ~DSP_CAP_DUPLEX;
1915                 return res;
1916         }
1917 #ifdef DSP_CAP_MULTI
1918         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1919                 if (substream->pstr->substream_count > 1)
1920                         res |= DSP_CAP_MULTI;
1921 #endif
1922         /* DSP_CAP_REALTIME is set all times: */
1923         /* all ALSA drivers can return actual pointer in ring buffer */
1924 #if defined(DSP_CAP_REALTIME) && 0
1925         {
1926                 struct snd_pcm_runtime *runtime = substream->runtime;
1927                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1928                         res &= ~DSP_CAP_REALTIME;
1929         }
1930 #endif
1931         return res;
1932 }
1933
1934 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1935 {
1936         int result, idx;
1937
1938         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1939         for (idx = 0; idx < 2; idx++) {
1940                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1941                 result = snd_pcm_oss_get_caps1(substream, result);
1942         }
1943         result |= 0x0001;       /* revision - same as SB AWE 64 */
1944         return result;
1945 }
1946
1947 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1948 {
1949         struct snd_pcm_runtime *runtime = substream->runtime;
1950         snd_pcm_uframes_t appl_ptr;
1951         appl_ptr = hw_ptr + runtime->buffer_size;
1952         appl_ptr %= runtime->boundary;
1953         runtime->control->appl_ptr = appl_ptr;
1954 }
1955
1956 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1957 {
1958         struct snd_pcm_runtime *runtime;
1959         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1960         int err, cmd;
1961
1962 #ifdef OSS_DEBUG
1963         printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1964 #endif
1965
1966         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1967         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1968
1969         if (psubstream) {
1970                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1971                         return err;
1972         }
1973         if (csubstream) {
1974                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1975                         return err;
1976         }
1977         if (psubstream) {
1978                 runtime = psubstream->runtime;
1979                 if (trigger & PCM_ENABLE_OUTPUT) {
1980                         if (runtime->oss.trigger)
1981                                 goto _skip1;
1982                         if (atomic_read(&psubstream->mmap_count))
1983                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1984                         runtime->oss.trigger = 1;
1985                         runtime->start_threshold = 1;
1986                         cmd = SNDRV_PCM_IOCTL_START;
1987                 } else {
1988                         if (!runtime->oss.trigger)
1989                                 goto _skip1;
1990                         runtime->oss.trigger = 0;
1991                         runtime->start_threshold = runtime->boundary;
1992                         cmd = SNDRV_PCM_IOCTL_DROP;
1993                         runtime->oss.prepare = 1;
1994                 }
1995                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1996                 if (err < 0)
1997                         return err;
1998         }
1999  _skip1:
2000         if (csubstream) {
2001                 runtime = csubstream->runtime;
2002                 if (trigger & PCM_ENABLE_INPUT) {
2003                         if (runtime->oss.trigger)
2004                                 goto _skip2;
2005                         runtime->oss.trigger = 1;
2006                         runtime->start_threshold = 1;
2007                         cmd = SNDRV_PCM_IOCTL_START;
2008                 } else {
2009                         if (!runtime->oss.trigger)
2010                                 goto _skip2;
2011                         runtime->oss.trigger = 0;
2012                         runtime->start_threshold = runtime->boundary;
2013                         cmd = SNDRV_PCM_IOCTL_DROP;
2014                         runtime->oss.prepare = 1;
2015                 }
2016                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2017                 if (err < 0)
2018                         return err;
2019         }
2020  _skip2:
2021         return 0;
2022 }
2023
2024 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2025 {
2026         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2027         int result = 0;
2028
2029         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2030         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2031         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2032                 result |= PCM_ENABLE_OUTPUT;
2033         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2034                 result |= PCM_ENABLE_INPUT;
2035         return result;
2036 }
2037
2038 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2039 {
2040         struct snd_pcm_substream *substream;
2041         struct snd_pcm_runtime *runtime;
2042         snd_pcm_sframes_t delay;
2043         int err;
2044
2045         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2046         if (substream == NULL)
2047                 return -EINVAL;
2048         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2049                 return err;
2050         runtime = substream->runtime;
2051         if (runtime->oss.params || runtime->oss.prepare)
2052                 return 0;
2053         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2054         if (err == -EPIPE)
2055                 delay = 0;      /* hack for broken OSS applications */
2056         else if (err < 0)
2057                 return err;
2058         return snd_pcm_oss_bytes(substream, delay);
2059 }
2060
2061 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2062 {
2063         struct snd_pcm_substream *substream;
2064         struct snd_pcm_runtime *runtime;
2065         snd_pcm_sframes_t delay;
2066         int fixup;
2067         struct count_info info;
2068         int err;
2069
2070         if (_info == NULL)
2071                 return -EFAULT;
2072         substream = pcm_oss_file->streams[stream];
2073         if (substream == NULL)
2074                 return -EINVAL;
2075         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2076                 return err;
2077         runtime = substream->runtime;
2078         if (runtime->oss.params || runtime->oss.prepare) {
2079                 memset(&info, 0, sizeof(info));
2080                 if (copy_to_user(_info, &info, sizeof(info)))
2081                         return -EFAULT;
2082                 return 0;
2083         }
2084         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2085                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2086                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2087                         err = 0;
2088                         delay = 0;
2089                         fixup = 0;
2090                 } else {
2091                         fixup = runtime->oss.buffer_used;
2092                 }
2093         } else {
2094                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2095                 fixup = -runtime->oss.buffer_used;
2096         }
2097         if (err < 0)
2098                 return err;
2099         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2100         if (atomic_read(&substream->mmap_count)) {
2101                 snd_pcm_sframes_t n;
2102                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2103                 if (n < 0)
2104                         n += runtime->boundary;
2105                 info.blocks = n / runtime->period_size;
2106                 runtime->oss.prev_hw_ptr_interrupt = delay;
2107                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2108                         snd_pcm_oss_simulate_fill(substream, delay);
2109                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2110         } else {
2111                 delay = snd_pcm_oss_bytes(substream, delay);
2112                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2113                         if (substream->oss.setup.buggyptr)
2114                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2115                         else
2116                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2117                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2118                 } else {
2119                         delay += fixup;
2120                         info.blocks = delay / runtime->oss.period_bytes;
2121                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2122                 }
2123         }
2124         if (copy_to_user(_info, &info, sizeof(info)))
2125                 return -EFAULT;
2126         return 0;
2127 }
2128
2129 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2130 {
2131         struct snd_pcm_substream *substream;
2132         struct snd_pcm_runtime *runtime;
2133         snd_pcm_sframes_t avail;
2134         int fixup;
2135         struct audio_buf_info info;
2136         int err;
2137
2138         if (_info == NULL)
2139                 return -EFAULT;
2140         substream = pcm_oss_file->streams[stream];
2141         if (substream == NULL)
2142                 return -EINVAL;
2143         runtime = substream->runtime;
2144
2145         if (runtime->oss.params &&
2146             (err = snd_pcm_oss_change_params(substream)) < 0)
2147                 return err;
2148
2149         info.fragsize = runtime->oss.period_bytes;
2150         info.fragstotal = runtime->periods;
2151         if (runtime->oss.prepare) {
2152                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2153                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2154                         info.fragments = runtime->oss.periods;
2155                 } else {
2156                         info.bytes = 0;
2157                         info.fragments = 0;
2158                 }
2159         } else {
2160                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2161                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2162                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2163                                 avail = runtime->buffer_size;
2164                                 err = 0;
2165                                 fixup = 0;
2166                         } else {
2167                                 avail = runtime->buffer_size - avail;
2168                                 fixup = -runtime->oss.buffer_used;
2169                         }
2170                 } else {
2171                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2172                         fixup = runtime->oss.buffer_used;
2173                 }
2174                 if (err < 0)
2175                         return err;
2176                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2177                 info.fragments = info.bytes / runtime->oss.period_bytes;
2178         }
2179
2180 #ifdef OSS_DEBUG
2181         printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2182                "fragstotal = %i, fragsize = %i\n",
2183                info.bytes, info.fragments, info.fragstotal, info.fragsize);
2184 #endif
2185         if (copy_to_user(_info, &info, sizeof(info)))
2186                 return -EFAULT;
2187         return 0;
2188 }
2189
2190 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2191 {
2192         // it won't be probably implemented
2193         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2194         return -EINVAL;
2195 }
2196
2197 static const char *strip_task_path(const char *path)
2198 {
2199         const char *ptr, *ptrl = NULL;
2200         for (ptr = path; *ptr; ptr++) {
2201                 if (*ptr == '/')
2202                         ptrl = ptr + 1;
2203         }
2204         return ptrl;
2205 }
2206
2207 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2208                                       const char *task_name,
2209                                       struct snd_pcm_oss_setup *rsetup)
2210 {
2211         struct snd_pcm_oss_setup *setup;
2212
2213         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2214         do {
2215                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2216                      setup = setup->next) {
2217                         if (!strcmp(setup->task_name, task_name))
2218                                 goto out;
2219                 }
2220         } while ((task_name = strip_task_path(task_name)) != NULL);
2221  out:
2222         if (setup)
2223                 *rsetup = *setup;
2224         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2225 }
2226
2227 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2228 {
2229         struct snd_pcm_runtime *runtime;
2230         runtime = substream->runtime;
2231         vfree(runtime->oss.buffer);
2232         runtime->oss.buffer = NULL;
2233 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2234         snd_pcm_oss_plugin_clear(substream);
2235 #endif
2236         substream->oss.oss = 0;
2237 }
2238
2239 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2240                                        struct snd_pcm_oss_setup *setup,
2241                                        int minor)
2242 {
2243         struct snd_pcm_runtime *runtime;
2244
2245         substream->oss.oss = 1;
2246         substream->oss.setup = *setup;
2247         if (setup->nonblock)
2248                 substream->f_flags |= O_NONBLOCK;
2249         else if (setup->block)
2250                 substream->f_flags &= ~O_NONBLOCK;
2251         runtime = substream->runtime;
2252         runtime->oss.params = 1;
2253         runtime->oss.trigger = 1;
2254         runtime->oss.rate = 8000;
2255         mutex_init(&runtime->oss.params_lock);
2256         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2257         case SNDRV_MINOR_OSS_PCM_8:
2258                 runtime->oss.format = AFMT_U8;
2259                 break;
2260         case SNDRV_MINOR_OSS_PCM_16:
2261                 runtime->oss.format = AFMT_S16_LE;
2262                 break;
2263         default:
2264                 runtime->oss.format = AFMT_MU_LAW;
2265         }
2266         runtime->oss.channels = 1;
2267         runtime->oss.fragshift = 0;
2268         runtime->oss.maxfrags = 0;
2269         runtime->oss.subdivision = 0;
2270         substream->pcm_release = snd_pcm_oss_release_substream;
2271 }
2272
2273 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2274 {
2275         int cidx;
2276         if (!pcm_oss_file)
2277                 return 0;
2278         for (cidx = 0; cidx < 2; ++cidx) {
2279                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2280                 if (substream)
2281                         snd_pcm_release_substream(substream);
2282         }
2283         kfree(pcm_oss_file);
2284         return 0;
2285 }
2286
2287 static int snd_pcm_oss_open_file(struct file *file,
2288                                  struct snd_pcm *pcm,
2289                                  struct snd_pcm_oss_file **rpcm_oss_file,
2290                                  int minor,
2291                                  struct snd_pcm_oss_setup *setup)
2292 {
2293         int idx, err;
2294         struct snd_pcm_oss_file *pcm_oss_file;
2295         struct snd_pcm_substream *substream;
2296         fmode_t f_mode = file->f_mode;
2297
2298         if (rpcm_oss_file)
2299                 *rpcm_oss_file = NULL;
2300
2301         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2302         if (pcm_oss_file == NULL)
2303                 return -ENOMEM;
2304
2305         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2306             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2307                 f_mode = FMODE_WRITE;
2308
2309         file->f_flags &= ~O_APPEND;
2310         for (idx = 0; idx < 2; idx++) {
2311                 if (setup[idx].disable)
2312                         continue;
2313                 if (! pcm->streams[idx].substream_count)
2314                         continue; /* no matching substream */
2315                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2316                         if (! (f_mode & FMODE_WRITE))
2317                                 continue;
2318                 } else {
2319                         if (! (f_mode & FMODE_READ))
2320                                 continue;
2321                 }
2322                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2323                 if (err < 0) {
2324                         snd_pcm_oss_release_file(pcm_oss_file);
2325                         return err;
2326                 }
2327
2328                 pcm_oss_file->streams[idx] = substream;
2329                 substream->file = pcm_oss_file;
2330                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2331         }
2332
2333         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2334                 snd_pcm_oss_release_file(pcm_oss_file);
2335                 return -EINVAL;
2336         }
2337
2338         file->private_data = pcm_oss_file;
2339         if (rpcm_oss_file)
2340                 *rpcm_oss_file = pcm_oss_file;
2341         return 0;
2342 }
2343
2344
2345 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2346 {
2347         unsigned int idx;
2348
2349         if (snd_BUG_ON(!task || !name || size < 2))
2350                 return -EINVAL;
2351         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2352                 name[idx] = task->comm[idx];
2353         name[idx] = '\0';
2354         return 0;
2355 }
2356
2357 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2358 {
2359         int err;
2360         char task_name[32];
2361         struct snd_pcm *pcm;
2362         struct snd_pcm_oss_file *pcm_oss_file;
2363         struct snd_pcm_oss_setup setup[2];
2364         int nonblock;
2365         wait_queue_t wait;
2366
2367         pcm = snd_lookup_oss_minor_data(iminor(inode),
2368                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2369         if (pcm == NULL) {
2370                 err = -ENODEV;
2371                 goto __error1;
2372         }
2373         err = snd_card_file_add(pcm->card, file);
2374         if (err < 0)
2375                 goto __error1;
2376         if (!try_module_get(pcm->card->module)) {
2377                 err = -EFAULT;
2378                 goto __error2;
2379         }
2380         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2381                 err = -EFAULT;
2382                 goto __error;
2383         }
2384         memset(setup, 0, sizeof(setup));
2385         if (file->f_mode & FMODE_WRITE)
2386                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2387                                            task_name, &setup[0]);
2388         if (file->f_mode & FMODE_READ)
2389                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2390                                            task_name, &setup[1]);
2391
2392         nonblock = !!(file->f_flags & O_NONBLOCK);
2393         if (!nonblock)
2394                 nonblock = nonblock_open;
2395
2396         init_waitqueue_entry(&wait, current);
2397         add_wait_queue(&pcm->open_wait, &wait);
2398         mutex_lock(&pcm->open_mutex);
2399         while (1) {
2400                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2401                                             iminor(inode), setup);
2402                 if (err >= 0)
2403                         break;
2404                 if (err == -EAGAIN) {
2405                         if (nonblock) {
2406                                 err = -EBUSY;
2407                                 break;
2408                         }
2409                 } else
2410                         break;
2411                 set_current_state(TASK_INTERRUPTIBLE);
2412                 mutex_unlock(&pcm->open_mutex);
2413                 schedule();
2414                 mutex_lock(&pcm->open_mutex);
2415                 if (signal_pending(current)) {
2416                         err = -ERESTARTSYS;
2417                         break;
2418                 }
2419         }
2420         remove_wait_queue(&pcm->open_wait, &wait);
2421         mutex_unlock(&pcm->open_mutex);
2422         if (err < 0)
2423                 goto __error;
2424         return err;
2425
2426       __error:
2427         module_put(pcm->card->module);
2428       __error2:
2429         snd_card_file_remove(pcm->card, file);
2430       __error1:
2431         return err;
2432 }
2433
2434 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2435 {
2436         struct snd_pcm *pcm;
2437         struct snd_pcm_substream *substream;
2438         struct snd_pcm_oss_file *pcm_oss_file;
2439
2440         pcm_oss_file = file->private_data;
2441         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2442         if (substream == NULL)
2443                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2444         if (snd_BUG_ON(!substream))
2445                 return -ENXIO;
2446         pcm = substream->pcm;
2447         if (!pcm->card->shutdown)
2448                 snd_pcm_oss_sync(pcm_oss_file);
2449         mutex_lock(&pcm->open_mutex);
2450         snd_pcm_oss_release_file(pcm_oss_file);
2451         mutex_unlock(&pcm->open_mutex);
2452         wake_up(&pcm->open_wait);
2453         module_put(pcm->card->module);
2454         snd_card_file_remove(pcm->card, file);
2455         return 0;
2456 }
2457
2458 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2459 {
2460         struct snd_pcm_oss_file *pcm_oss_file;
2461         int __user *p = (int __user *)arg;
2462         int res;
2463
2464         pcm_oss_file = file->private_data;
2465         if (cmd == OSS_GETVERSION)
2466                 return put_user(SNDRV_OSS_VERSION, p);
2467         if (cmd == OSS_ALSAEMULVER)
2468                 return put_user(1, p);
2469 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2470         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2471                 struct snd_pcm_substream *substream;
2472                 int idx;
2473                 for (idx = 0; idx < 2; ++idx) {
2474                         substream = pcm_oss_file->streams[idx];
2475                         if (substream != NULL)
2476                                 break;
2477                 }
2478                 if (snd_BUG_ON(idx >= 2))
2479                         return -ENXIO;
2480                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2481         }
2482 #endif
2483         if (((cmd >> 8) & 0xff) != 'P')
2484                 return -EINVAL;
2485 #ifdef OSS_DEBUG
2486         printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2487 #endif
2488         switch (cmd) {
2489         case SNDCTL_DSP_RESET:
2490                 return snd_pcm_oss_reset(pcm_oss_file);
2491         case SNDCTL_DSP_SYNC:
2492                 return snd_pcm_oss_sync(pcm_oss_file);
2493         case SNDCTL_DSP_SPEED:
2494                 if (get_user(res, p))
2495                         return -EFAULT;
2496                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2497                         return res;
2498                 return put_user(res, p);
2499         case SOUND_PCM_READ_RATE:
2500                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2501                 if (res < 0)
2502                         return res;
2503                 return put_user(res, p);
2504         case SNDCTL_DSP_STEREO:
2505                 if (get_user(res, p))
2506                         return -EFAULT;
2507                 res = res > 0 ? 2 : 1;
2508                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2509                         return res;
2510                 return put_user(--res, p);
2511         case SNDCTL_DSP_GETBLKSIZE:
2512                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2513                 if (res < 0)
2514                         return res;
2515                 return put_user(res, p);
2516         case SNDCTL_DSP_SETFMT:
2517                 if (get_user(res, p))
2518                         return -EFAULT;
2519                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2520                 if (res < 0)
2521                         return res;
2522                 return put_user(res, p);
2523         case SOUND_PCM_READ_BITS:
2524                 res = snd_pcm_oss_get_format(pcm_oss_file);
2525                 if (res < 0)
2526                         return res;
2527                 return put_user(res, p);
2528         case SNDCTL_DSP_CHANNELS:
2529                 if (get_user(res, p))
2530                         return -EFAULT;
2531                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2532                 if (res < 0)
2533                         return res;
2534                 return put_user(res, p);
2535         case SOUND_PCM_READ_CHANNELS:
2536                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2537                 if (res < 0)
2538                         return res;
2539                 return put_user(res, p);
2540         case SOUND_PCM_WRITE_FILTER:
2541         case SOUND_PCM_READ_FILTER:
2542                 return -EIO;
2543         case SNDCTL_DSP_POST:
2544                 return snd_pcm_oss_post(pcm_oss_file);
2545         case SNDCTL_DSP_SUBDIVIDE:
2546                 if (get_user(res, p))
2547                         return -EFAULT;
2548                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2549                 if (res < 0)
2550                         return res;
2551                 return put_user(res, p);
2552         case SNDCTL_DSP_SETFRAGMENT:
2553                 if (get_user(res, p))
2554                         return -EFAULT;
2555                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2556         case SNDCTL_DSP_GETFMTS:
2557                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2558                 if (res < 0)
2559                         return res;
2560                 return put_user(res, p);
2561         case SNDCTL_DSP_GETOSPACE:
2562         case SNDCTL_DSP_GETISPACE:
2563                 return snd_pcm_oss_get_space(pcm_oss_file,
2564                         cmd == SNDCTL_DSP_GETISPACE ?
2565                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2566                         (struct audio_buf_info __user *) arg);
2567         case SNDCTL_DSP_NONBLOCK:
2568                 return snd_pcm_oss_nonblock(file);
2569         case SNDCTL_DSP_GETCAPS:
2570                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2571                 if (res < 0)
2572                         return res;
2573                 return put_user(res, p);
2574         case SNDCTL_DSP_GETTRIGGER:
2575                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2576                 if (res < 0)
2577                         return res;
2578                 return put_user(res, p);
2579         case SNDCTL_DSP_SETTRIGGER:
2580                 if (get_user(res, p))
2581                         return -EFAULT;
2582                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2583         case SNDCTL_DSP_GETIPTR:
2584         case SNDCTL_DSP_GETOPTR:
2585                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2586                         cmd == SNDCTL_DSP_GETIPTR ?
2587                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2588                         (struct count_info __user *) arg);
2589         case SNDCTL_DSP_MAPINBUF:
2590         case SNDCTL_DSP_MAPOUTBUF:
2591                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2592                         cmd == SNDCTL_DSP_MAPINBUF ?
2593                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2594                         (struct buffmem_desc __user *) arg);
2595         case SNDCTL_DSP_SETSYNCRO:
2596                 /* stop DMA now.. */
2597                 return 0;
2598         case SNDCTL_DSP_SETDUPLEX:
2599                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2600                         return 0;
2601                 return -EIO;
2602         case SNDCTL_DSP_GETODELAY:
2603                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2604                 if (res < 0) {
2605                         /* it's for sure, some broken apps don't check for error codes */
2606                         put_user(0, p);
2607                         return res;
2608                 }
2609                 return put_user(res, p);
2610         case SNDCTL_DSP_PROFILE:
2611                 return 0;       /* silently ignore */
2612         default:
2613                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2614         }
2615         return -EINVAL;
2616 }
2617
2618 #ifdef CONFIG_COMPAT
2619 /* all compatible */
2620 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2621 #else
2622 #define snd_pcm_oss_ioctl_compat        NULL
2623 #endif
2624
2625 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2626 {
2627         struct snd_pcm_oss_file *pcm_oss_file;
2628         struct snd_pcm_substream *substream;
2629
2630         pcm_oss_file = file->private_data;
2631         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2632         if (substream == NULL)
2633                 return -ENXIO;
2634         substream->f_flags = file->f_flags & O_NONBLOCK;
2635 #ifndef OSS_DEBUG
2636         return snd_pcm_oss_read1(substream, buf, count);
2637 #else
2638         {
2639                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2640                 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2641                        "(returned %li bytes)\n", (long)count, (long)res);
2642                 return res;
2643         }
2644 #endif
2645 }
2646
2647 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2648 {
2649         struct snd_pcm_oss_file *pcm_oss_file;
2650         struct snd_pcm_substream *substream;
2651         long result;
2652
2653         pcm_oss_file = file->private_data;
2654         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2655         if (substream == NULL)
2656                 return -ENXIO;
2657         substream->f_flags = file->f_flags & O_NONBLOCK;
2658         result = snd_pcm_oss_write1(substream, buf, count);
2659 #ifdef OSS_DEBUG
2660         printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2661                (long)count, (long)result);
2662 #endif
2663         return result;
2664 }
2665
2666 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2667 {
2668         struct snd_pcm_runtime *runtime = substream->runtime;
2669         if (atomic_read(&substream->mmap_count))
2670                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2671         else
2672                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2673 }
2674
2675 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2676 {
2677         struct snd_pcm_runtime *runtime = substream->runtime;
2678         if (atomic_read(&substream->mmap_count))
2679                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2680         else
2681                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2682 }
2683
2684 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2685 {
2686         struct snd_pcm_oss_file *pcm_oss_file;
2687         unsigned int mask;
2688         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2689
2690         pcm_oss_file = file->private_data;
2691
2692         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2693         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2694
2695         mask = 0;
2696         if (psubstream != NULL) {
2697                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2698                 poll_wait(file, &runtime->sleep, wait);
2699                 snd_pcm_stream_lock_irq(psubstream);
2700                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2701                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2702                      snd_pcm_oss_playback_ready(psubstream)))
2703                         mask |= POLLOUT | POLLWRNORM;
2704                 snd_pcm_stream_unlock_irq(psubstream);
2705         }
2706         if (csubstream != NULL) {
2707                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2708                 snd_pcm_state_t ostate;
2709                 poll_wait(file, &runtime->sleep, wait);
2710                 snd_pcm_stream_lock_irq(csubstream);
2711                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2712                     snd_pcm_oss_capture_ready(csubstream))
2713                         mask |= POLLIN | POLLRDNORM;
2714                 snd_pcm_stream_unlock_irq(csubstream);
2715                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2716                         struct snd_pcm_oss_file ofile;
2717                         memset(&ofile, 0, sizeof(ofile));
2718                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2719                         runtime->oss.trigger = 0;
2720                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2721                 }
2722         }
2723
2724         return mask;
2725 }
2726
2727 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2728 {
2729         struct snd_pcm_oss_file *pcm_oss_file;
2730         struct snd_pcm_substream *substream = NULL;
2731         struct snd_pcm_runtime *runtime;
2732         int err;
2733
2734 #ifdef OSS_DEBUG
2735         printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2736 #endif
2737         pcm_oss_file = file->private_data;
2738         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2739         case VM_READ | VM_WRITE:
2740                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2741                 if (substream)
2742                         break;
2743                 /* Fall through */
2744         case VM_READ:
2745                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2746                 break;
2747         case VM_WRITE:
2748                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2749                 break;
2750         default:
2751                 return -EINVAL;
2752         }
2753         /* set VM_READ access as well to fix memset() routines that do
2754            reads before writes (to improve performance) */
2755         area->vm_flags |= VM_READ;
2756         if (substream == NULL)
2757                 return -ENXIO;
2758         runtime = substream->runtime;
2759         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2760                 return -EIO;
2761         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2762                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2763         else
2764                 return -EIO;
2765
2766         if (runtime->oss.params) {
2767                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2768                         return err;
2769         }
2770 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2771         if (runtime->oss.plugin_first != NULL)
2772                 return -EIO;
2773 #endif
2774
2775         if (area->vm_pgoff != 0)
2776                 return -EINVAL;
2777
2778         err = snd_pcm_mmap_data(substream, file, area);
2779         if (err < 0)
2780                 return err;
2781         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2782         runtime->silence_threshold = 0;
2783         runtime->silence_size = 0;
2784 #ifdef OSS_DEBUG
2785         printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2786                runtime->oss.mmap_bytes);
2787 #endif
2788         /* In mmap mode we never stop */
2789         runtime->stop_threshold = runtime->boundary;
2790
2791         return 0;
2792 }
2793
2794 #ifdef CONFIG_SND_VERBOSE_PROCFS
2795 /*
2796  *  /proc interface
2797  */
2798
2799 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2800                                   struct snd_info_buffer *buffer)
2801 {
2802         struct snd_pcm_str *pstr = entry->private_data;
2803         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2804         mutex_lock(&pstr->oss.setup_mutex);
2805         while (setup) {
2806                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2807                             setup->task_name,
2808                             setup->periods,
2809                             setup->period_size,
2810                             setup->disable ? " disable" : "",
2811                             setup->direct ? " direct" : "",
2812                             setup->block ? " block" : "",
2813                             setup->nonblock ? " non-block" : "",
2814                             setup->partialfrag ? " partial-frag" : "",
2815                             setup->nosilence ? " no-silence" : "");
2816                 setup = setup->next;
2817         }
2818         mutex_unlock(&pstr->oss.setup_mutex);
2819 }
2820
2821 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2822 {
2823         struct snd_pcm_oss_setup *setup, *setupn;
2824
2825         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2826              setup; setup = setupn) {
2827                 setupn = setup->next;
2828                 kfree(setup->task_name);
2829                 kfree(setup);
2830         }
2831         pstr->oss.setup_list = NULL;
2832 }
2833
2834 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2835                                    struct snd_info_buffer *buffer)
2836 {
2837         struct snd_pcm_str *pstr = entry->private_data;
2838         char line[128], str[32], task_name[32], *ptr;
2839         int idx1;
2840         struct snd_pcm_oss_setup *setup, *setup1, template;
2841
2842         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2843                 mutex_lock(&pstr->oss.setup_mutex);
2844                 memset(&template, 0, sizeof(template));
2845                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2846                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2847                         snd_pcm_oss_proc_free_setup_list(pstr);
2848                         mutex_unlock(&pstr->oss.setup_mutex);
2849                         continue;
2850                 }
2851                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2852                         if (!strcmp(setup->task_name, task_name)) {
2853                                 template = *setup;
2854                                 break;
2855                         }
2856                 }
2857                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2858                 template.periods = simple_strtoul(str, NULL, 10);
2859                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2860                 template.period_size = simple_strtoul(str, NULL, 10);
2861                 for (idx1 = 31; idx1 >= 0; idx1--)
2862                         if (template.period_size & (1 << idx1))
2863                                 break;
2864                 for (idx1--; idx1 >= 0; idx1--)
2865                         template.period_size &= ~(1 << idx1);
2866                 do {
2867                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2868                         if (!strcmp(str, "disable")) {
2869                                 template.disable = 1;
2870                         } else if (!strcmp(str, "direct")) {
2871                                 template.direct = 1;
2872                         } else if (!strcmp(str, "block")) {
2873                                 template.block = 1;
2874                         } else if (!strcmp(str, "non-block")) {
2875                                 template.nonblock = 1;
2876                         } else if (!strcmp(str, "partial-frag")) {
2877                                 template.partialfrag = 1;
2878                         } else if (!strcmp(str, "no-silence")) {
2879                                 template.nosilence = 1;
2880                         } else if (!strcmp(str, "buggy-ptr")) {
2881                                 template.buggyptr = 1;
2882                         }
2883                 } while (*str);
2884                 if (setup == NULL) {
2885                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2886                         if (! setup) {
2887                                 buffer->error = -ENOMEM;
2888                                 mutex_unlock(&pstr->oss.setup_mutex);
2889                                 return;
2890                         }
2891                         if (pstr->oss.setup_list == NULL)
2892                                 pstr->oss.setup_list = setup;
2893                         else {
2894                                 for (setup1 = pstr->oss.setup_list;
2895                                      setup1->next; setup1 = setup1->next);
2896                                 setup1->next = setup;
2897                         }
2898                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2899                         if (! template.task_name) {
2900                                 kfree(setup);
2901                                 buffer->error = -ENOMEM;
2902                                 mutex_unlock(&pstr->oss.setup_mutex);
2903                                 return;
2904                         }
2905                 }
2906                 *setup = template;
2907                 mutex_unlock(&pstr->oss.setup_mutex);
2908         }
2909 }
2910
2911 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2912 {
2913         int stream;
2914         for (stream = 0; stream < 2; ++stream) {
2915                 struct snd_info_entry *entry;
2916                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2917                 if (pstr->substream_count == 0)
2918                         continue;
2919                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2920                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2921                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2922                         entry->c.text.read = snd_pcm_oss_proc_read;
2923                         entry->c.text.write = snd_pcm_oss_proc_write;
2924                         entry->private_data = pstr;
2925                         if (snd_info_register(entry) < 0) {
2926                                 snd_info_free_entry(entry);
2927                                 entry = NULL;
2928                         }
2929                 }
2930                 pstr->oss.proc_entry = entry;
2931         }
2932 }
2933
2934 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2935 {
2936         int stream;
2937         for (stream = 0; stream < 2; ++stream) {
2938                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2939                 snd_info_free_entry(pstr->oss.proc_entry);
2940                 pstr->oss.proc_entry = NULL;
2941                 snd_pcm_oss_proc_free_setup_list(pstr);
2942         }
2943 }
2944 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2945 #define snd_pcm_oss_proc_init(pcm)
2946 #define snd_pcm_oss_proc_done(pcm)
2947 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2948
2949 /*
2950  *  ENTRY functions
2951  */
2952
2953 static const struct file_operations snd_pcm_oss_f_reg =
2954 {
2955         .owner =        THIS_MODULE,
2956         .read =         snd_pcm_oss_read,
2957         .write =        snd_pcm_oss_write,
2958         .open =         snd_pcm_oss_open,
2959         .release =      snd_pcm_oss_release,
2960         .poll =         snd_pcm_oss_poll,
2961         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2962         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2963         .mmap =         snd_pcm_oss_mmap,
2964 };
2965
2966 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2967 {
2968         char name[128];
2969         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2970         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2971                                     pcm->card, index, &snd_pcm_oss_f_reg,
2972                                     pcm, name) < 0) {
2973                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2974                            pcm->card->number, pcm->device);
2975         }
2976 }
2977
2978 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2979 {
2980         pcm->oss.reg = 0;
2981         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2982                 char name[128];
2983                 int duplex;
2984                 register_oss_dsp(pcm, 0);
2985                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2986                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2987                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2988                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2989 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2990                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2991                                       pcm->card->number,
2992                                       name);
2993 #endif
2994                 pcm->oss.reg++;
2995                 pcm->oss.reg_mask |= 1;
2996         }
2997         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2998                 register_oss_dsp(pcm, 1);
2999                 pcm->oss.reg++;
3000                 pcm->oss.reg_mask |= 2;
3001         }
3002
3003         if (pcm->oss.reg)
3004                 snd_pcm_oss_proc_init(pcm);
3005
3006         return 0;
3007 }
3008
3009 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3010 {
3011         if (pcm->oss.reg) {
3012                 if (pcm->oss.reg_mask & 1) {
3013                         pcm->oss.reg_mask &= ~1;
3014                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3015                                                   pcm->card, 0);
3016                 }
3017                 if (pcm->oss.reg_mask & 2) {
3018                         pcm->oss.reg_mask &= ~2;
3019                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3020                                                   pcm->card, 1);
3021                 }
3022                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3023 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3024                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3025 #endif
3026                 }
3027                 pcm->oss.reg = 0;
3028         }
3029         return 0;
3030 }
3031
3032 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3033 {
3034         snd_pcm_oss_disconnect_minor(pcm);
3035         snd_pcm_oss_proc_done(pcm);
3036         return 0;
3037 }
3038
3039 static struct snd_pcm_notify snd_pcm_oss_notify =
3040 {
3041         .n_register =   snd_pcm_oss_register_minor,
3042         .n_disconnect = snd_pcm_oss_disconnect_minor,
3043         .n_unregister = snd_pcm_oss_unregister_minor,
3044 };
3045
3046 static int __init alsa_pcm_oss_init(void)
3047 {
3048         int i;
3049         int err;
3050
3051         /* check device map table */
3052         for (i = 0; i < SNDRV_CARDS; i++) {
3053                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3054                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3055                                    i, dsp_map[i]);
3056                         dsp_map[i] = 0;
3057                 }
3058                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3059                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3060                                    i, adsp_map[i]);
3061                         adsp_map[i] = 1;
3062                 }
3063         }
3064         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3065                 return err;
3066         return 0;
3067 }
3068
3069 static void __exit alsa_pcm_oss_exit(void)
3070 {
3071         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3072 }
3073
3074 module_init(alsa_pcm_oss_init)
3075 module_exit(alsa_pcm_oss_exit)