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("pcm_oss: write: recovering from XRUN\n");
1164                         else
1165                                 printk("pcm_oss: write: recovering from SUSPEND\n");
1166 #endif
1167                         ret = snd_pcm_oss_prepare(substream);
1168                         if (ret < 0)
1169                                 break;
1170                 }
1171                 if (in_kernel) {
1172                         mm_segment_t fs;
1173                         fs = snd_enter_user();
1174                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1175                         snd_leave_user(fs);
1176                 } else {
1177                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1178                 }
1179                 if (ret != -EPIPE && ret != -ESTRPIPE)
1180                         break;
1181                 /* test, if we can't store new data, because the stream */
1182                 /* has not been started */
1183                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1184                         return -EAGAIN;
1185         }
1186         return ret;
1187 }
1188
1189 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1190 {
1191         struct snd_pcm_runtime *runtime = substream->runtime;
1192         snd_pcm_sframes_t delay;
1193         int ret;
1194         while (1) {
1195                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1196                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1197 #ifdef OSS_DEBUG
1198                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1199                                 printk("pcm_oss: read: recovering from XRUN\n");
1200                         else
1201                                 printk("pcm_oss: read: recovering from SUSPEND\n");
1202 #endif
1203                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1204                         if (ret < 0)
1205                                 break;
1206                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1207                         ret = snd_pcm_oss_prepare(substream);
1208                         if (ret < 0)
1209                                 break;
1210                 }
1211                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1212                 if (ret < 0)
1213                         break;
1214                 if (in_kernel) {
1215                         mm_segment_t fs;
1216                         fs = snd_enter_user();
1217                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1218                         snd_leave_user(fs);
1219                 } else {
1220                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1221                 }
1222                 if (ret == -EPIPE) {
1223                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1224                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1225                                 if (ret < 0)
1226                                         break;
1227                         }
1228                         continue;
1229                 }
1230                 if (ret != -ESTRPIPE)
1231                         break;
1232         }
1233         return ret;
1234 }
1235
1236 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1237 {
1238         struct snd_pcm_runtime *runtime = substream->runtime;
1239         int ret;
1240         while (1) {
1241                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1242                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1243 #ifdef OSS_DEBUG
1244                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1245                                 printk("pcm_oss: writev: recovering from XRUN\n");
1246                         else
1247                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
1248 #endif
1249                         ret = snd_pcm_oss_prepare(substream);
1250                         if (ret < 0)
1251                                 break;
1252                 }
1253                 if (in_kernel) {
1254                         mm_segment_t fs;
1255                         fs = snd_enter_user();
1256                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1257                         snd_leave_user(fs);
1258                 } else {
1259                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1260                 }
1261                 if (ret != -EPIPE && ret != -ESTRPIPE)
1262                         break;
1263
1264                 /* test, if we can't store new data, because the stream */
1265                 /* has not been started */
1266                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1267                         return -EAGAIN;
1268         }
1269         return ret;
1270 }
1271
1272 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1273 {
1274         struct snd_pcm_runtime *runtime = substream->runtime;
1275         int ret;
1276         while (1) {
1277                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1278                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1279 #ifdef OSS_DEBUG
1280                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1281                                 printk("pcm_oss: readv: recovering from XRUN\n");
1282                         else
1283                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
1284 #endif
1285                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1286                         if (ret < 0)
1287                                 break;
1288                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1289                         ret = snd_pcm_oss_prepare(substream);
1290                         if (ret < 0)
1291                                 break;
1292                 }
1293                 if (in_kernel) {
1294                         mm_segment_t fs;
1295                         fs = snd_enter_user();
1296                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1297                         snd_leave_user(fs);
1298                 } else {
1299                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1300                 }
1301                 if (ret != -EPIPE && ret != -ESTRPIPE)
1302                         break;
1303         }
1304         return ret;
1305 }
1306
1307 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1308 {
1309         struct snd_pcm_runtime *runtime = substream->runtime;
1310         snd_pcm_sframes_t frames, frames1;
1311 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1312         if (runtime->oss.plugin_first) {
1313                 struct snd_pcm_plugin_channel *channels;
1314                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1315                 if (!in_kernel) {
1316                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1317                                 return -EFAULT;
1318                         buf = runtime->oss.buffer;
1319                 }
1320                 frames = bytes / oss_frame_bytes;
1321                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1322                 if (frames1 < 0)
1323                         return frames1;
1324                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1325                 if (frames1 <= 0)
1326                         return frames1;
1327                 bytes = frames1 * oss_frame_bytes;
1328         } else
1329 #endif
1330         {
1331                 frames = bytes_to_frames(runtime, bytes);
1332                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1333                 if (frames1 <= 0)
1334                         return frames1;
1335                 bytes = frames_to_bytes(runtime, frames1);
1336         }
1337         return bytes;
1338 }
1339
1340 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1341 {
1342         size_t xfer = 0;
1343         ssize_t tmp;
1344         struct snd_pcm_runtime *runtime = substream->runtime;
1345
1346         if (atomic_read(&substream->mmap_count))
1347                 return -ENXIO;
1348
1349         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1350                 return tmp;
1351         mutex_lock(&runtime->oss.params_lock);
1352         while (bytes > 0) {
1353                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1354                         tmp = bytes;
1355                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1356                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1357                         if (tmp > 0) {
1358                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1359                                         tmp = -EFAULT;
1360                                         goto err;
1361                                 }
1362                         }
1363                         runtime->oss.buffer_used += tmp;
1364                         buf += tmp;
1365                         bytes -= tmp;
1366                         xfer += tmp;
1367                         if (substream->oss.setup.partialfrag ||
1368                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1369                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1370                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1371                                 if (tmp <= 0)
1372                                         goto err;
1373                                 runtime->oss.bytes += tmp;
1374                                 runtime->oss.period_ptr += tmp;
1375                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1376                                 if (runtime->oss.period_ptr == 0 ||
1377                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1378                                         runtime->oss.buffer_used = 0;
1379                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1380                                         tmp = -EAGAIN;
1381                                         goto err;
1382                                 }
1383                         }
1384                 } else {
1385                         tmp = snd_pcm_oss_write2(substream,
1386                                                  (const char __force *)buf,
1387                                                  runtime->oss.period_bytes, 0);
1388                         if (tmp <= 0)
1389                                 goto err;
1390                         runtime->oss.bytes += tmp;
1391                         buf += tmp;
1392                         bytes -= tmp;
1393                         xfer += tmp;
1394                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1395                             tmp != runtime->oss.period_bytes)
1396                                 break;
1397                 }
1398         }
1399         mutex_unlock(&runtime->oss.params_lock);
1400         return xfer;
1401
1402  err:
1403         mutex_unlock(&runtime->oss.params_lock);
1404         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1405 }
1406
1407 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1408 {
1409         struct snd_pcm_runtime *runtime = substream->runtime;
1410         snd_pcm_sframes_t frames, frames1;
1411 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1412         char __user *final_dst = (char __user *)buf;
1413         if (runtime->oss.plugin_first) {
1414                 struct snd_pcm_plugin_channel *channels;
1415                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1416                 if (!in_kernel)
1417                         buf = runtime->oss.buffer;
1418                 frames = bytes / oss_frame_bytes;
1419                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1420                 if (frames1 < 0)
1421                         return frames1;
1422                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1423                 if (frames1 <= 0)
1424                         return frames1;
1425                 bytes = frames1 * oss_frame_bytes;
1426                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1427                         return -EFAULT;
1428         } else
1429 #endif
1430         {
1431                 frames = bytes_to_frames(runtime, bytes);
1432                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1433                 if (frames1 <= 0)
1434                         return frames1;
1435                 bytes = frames_to_bytes(runtime, frames1);
1436         }
1437         return bytes;
1438 }
1439
1440 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1441 {
1442         size_t xfer = 0;
1443         ssize_t tmp;
1444         struct snd_pcm_runtime *runtime = substream->runtime;
1445
1446         if (atomic_read(&substream->mmap_count))
1447                 return -ENXIO;
1448
1449         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1450                 return tmp;
1451         mutex_lock(&runtime->oss.params_lock);
1452         while (bytes > 0) {
1453                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1454                         if (runtime->oss.buffer_used == 0) {
1455                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1456                                 if (tmp <= 0)
1457                                         goto err;
1458                                 runtime->oss.bytes += tmp;
1459                                 runtime->oss.period_ptr = tmp;
1460                                 runtime->oss.buffer_used = tmp;
1461                         }
1462                         tmp = bytes;
1463                         if ((size_t) tmp > runtime->oss.buffer_used)
1464                                 tmp = runtime->oss.buffer_used;
1465                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1466                                 tmp = -EFAULT;
1467                                 goto err;
1468                         }
1469                         buf += tmp;
1470                         bytes -= tmp;
1471                         xfer += tmp;
1472                         runtime->oss.buffer_used -= tmp;
1473                 } else {
1474                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1475                                                 runtime->oss.period_bytes, 0);
1476                         if (tmp <= 0)
1477                                 goto err;
1478                         runtime->oss.bytes += tmp;
1479                         buf += tmp;
1480                         bytes -= tmp;
1481                         xfer += tmp;
1482                 }
1483         }
1484         mutex_unlock(&runtime->oss.params_lock);
1485         return xfer;
1486
1487  err:
1488         mutex_unlock(&runtime->oss.params_lock);
1489         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1490 }
1491
1492 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1493 {
1494         struct snd_pcm_substream *substream;
1495
1496         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1497         if (substream != NULL) {
1498                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1499                 substream->runtime->oss.prepare = 1;
1500         }
1501         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1502         if (substream != NULL) {
1503                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1504                 substream->runtime->oss.prepare = 1;
1505         }
1506         return 0;
1507 }
1508
1509 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1510 {
1511         struct snd_pcm_substream *substream;
1512         int err;
1513
1514         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1515         if (substream != NULL) {
1516                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1517                         return err;
1518                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1519         }
1520         /* note: all errors from the start action are ignored */
1521         /* OSS apps do not know, how to handle them */
1522         return 0;
1523 }
1524
1525 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1526 {
1527         struct snd_pcm_runtime *runtime;
1528         ssize_t result = 0;
1529         long res;
1530         wait_queue_t wait;
1531
1532         runtime = substream->runtime;
1533         init_waitqueue_entry(&wait, current);
1534         add_wait_queue(&runtime->sleep, &wait);
1535 #ifdef OSS_DEBUG
1536         printk("sync1: size = %li\n", size);
1537 #endif
1538         while (1) {
1539                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1540                 if (result > 0) {
1541                         runtime->oss.buffer_used = 0;
1542                         result = 0;
1543                         break;
1544                 }
1545                 if (result != 0 && result != -EAGAIN)
1546                         break;
1547                 result = 0;
1548                 set_current_state(TASK_INTERRUPTIBLE);
1549                 snd_pcm_stream_lock_irq(substream);
1550                 res = runtime->status->state;
1551                 snd_pcm_stream_unlock_irq(substream);
1552                 if (res != SNDRV_PCM_STATE_RUNNING) {
1553                         set_current_state(TASK_RUNNING);
1554                         break;
1555                 }
1556                 res = schedule_timeout(10 * HZ);
1557                 if (signal_pending(current)) {
1558                         result = -ERESTARTSYS;
1559                         break;
1560                 }
1561                 if (res == 0) {
1562                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1563                         result = -EIO;
1564                         break;
1565                 }
1566         }
1567         remove_wait_queue(&runtime->sleep, &wait);
1568         return result;
1569 }
1570
1571 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1572 {
1573         int err = 0;
1574         unsigned int saved_f_flags;
1575         struct snd_pcm_substream *substream;
1576         struct snd_pcm_runtime *runtime;
1577         snd_pcm_format_t format;
1578         unsigned long width;
1579         size_t size;
1580
1581         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1582         if (substream != NULL) {
1583                 runtime = substream->runtime;
1584                 if (atomic_read(&substream->mmap_count))
1585                         goto __direct;
1586                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1587                         return err;
1588                 format = snd_pcm_oss_format_from(runtime->oss.format);
1589                 width = snd_pcm_format_physical_width(format);
1590                 mutex_lock(&runtime->oss.params_lock);
1591                 if (runtime->oss.buffer_used > 0) {
1592 #ifdef OSS_DEBUG
1593                         printk("sync: buffer_used\n");
1594 #endif
1595                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1596                         snd_pcm_format_set_silence(format,
1597                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1598                                                    size);
1599                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1600                         if (err < 0) {
1601                                 mutex_unlock(&runtime->oss.params_lock);
1602                                 return err;
1603                         }
1604                 } else if (runtime->oss.period_ptr > 0) {
1605 #ifdef OSS_DEBUG
1606                         printk("sync: period_ptr\n");
1607 #endif
1608                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1609                         snd_pcm_format_set_silence(format,
1610                                                    runtime->oss.buffer,
1611                                                    size * 8 / width);
1612                         err = snd_pcm_oss_sync1(substream, size);
1613                         if (err < 0) {
1614                                 mutex_unlock(&runtime->oss.params_lock);
1615                                 return err;
1616                         }
1617                 }
1618                 /*
1619                  * The ALSA's period might be a bit large than OSS one.
1620                  * Fill the remain portion of ALSA period with zeros.
1621                  */
1622                 size = runtime->control->appl_ptr % runtime->period_size;
1623                 if (size > 0) {
1624                         size = runtime->period_size - size;
1625                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1626                                 size = (runtime->frame_bits * size) / 8;
1627                                 while (size > 0) {
1628                                         mm_segment_t fs;
1629                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1630                                         size -= size1;
1631                                         size1 *= 8;
1632                                         size1 /= runtime->sample_bits;
1633                                         snd_pcm_format_set_silence(runtime->format,
1634                                                                    runtime->oss.buffer,
1635                                                                    size1);
1636                                         size1 /= runtime->channels; /* frames */
1637                                         fs = snd_enter_user();
1638                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1639                                         snd_leave_user(fs);
1640                                 }
1641                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1642                                 void __user *buffers[runtime->channels];
1643                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1644                                 snd_pcm_lib_writev(substream, buffers, size);
1645                         }
1646                 }
1647                 mutex_unlock(&runtime->oss.params_lock);
1648                 /*
1649                  * finish sync: drain the buffer
1650                  */
1651               __direct:
1652                 saved_f_flags = substream->f_flags;
1653                 substream->f_flags &= ~O_NONBLOCK;
1654                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1655                 substream->f_flags = saved_f_flags;
1656                 if (err < 0)
1657                         return err;
1658                 runtime->oss.prepare = 1;
1659         }
1660
1661         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1662         if (substream != NULL) {
1663                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1664                         return err;
1665                 runtime = substream->runtime;
1666                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1667                 if (err < 0)
1668                         return err;
1669                 runtime->oss.buffer_used = 0;
1670                 runtime->oss.prepare = 1;
1671         }
1672         return 0;
1673 }
1674
1675 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1676 {
1677         int idx;
1678
1679         for (idx = 1; idx >= 0; --idx) {
1680                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1681                 struct snd_pcm_runtime *runtime;
1682                 if (substream == NULL)
1683                         continue;
1684                 runtime = substream->runtime;
1685                 if (rate < 1000)
1686                         rate = 1000;
1687                 else if (rate > 192000)
1688                         rate = 192000;
1689                 if (runtime->oss.rate != rate) {
1690                         runtime->oss.params = 1;
1691                         runtime->oss.rate = rate;
1692                 }
1693         }
1694         return snd_pcm_oss_get_rate(pcm_oss_file);
1695 }
1696
1697 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1698 {
1699         struct snd_pcm_substream *substream;
1700         int err;
1701
1702         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1703                 return err;
1704         return substream->runtime->oss.rate;
1705 }
1706
1707 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1708 {
1709         int idx;
1710         if (channels < 1)
1711                 channels = 1;
1712         if (channels > 128)
1713                 return -EINVAL;
1714         for (idx = 1; idx >= 0; --idx) {
1715                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1716                 struct snd_pcm_runtime *runtime;
1717                 if (substream == NULL)
1718                         continue;
1719                 runtime = substream->runtime;
1720                 if (runtime->oss.channels != channels) {
1721                         runtime->oss.params = 1;
1722                         runtime->oss.channels = channels;
1723                 }
1724         }
1725         return snd_pcm_oss_get_channels(pcm_oss_file);
1726 }
1727
1728 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1729 {
1730         struct snd_pcm_substream *substream;
1731         int err;
1732
1733         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1734                 return err;
1735         return substream->runtime->oss.channels;
1736 }
1737
1738 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1739 {
1740         struct snd_pcm_substream *substream;
1741         int err;
1742
1743         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1744                 return err;
1745         return substream->runtime->oss.period_bytes;
1746 }
1747
1748 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1749 {
1750         struct snd_pcm_substream *substream;
1751         int err;
1752         int direct;
1753         struct snd_pcm_hw_params *params;
1754         unsigned int formats = 0;
1755         struct snd_mask format_mask;
1756         int fmt;
1757
1758         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1759                 return err;
1760         if (atomic_read(&substream->mmap_count))
1761                 direct = 1;
1762         else
1763                 direct = substream->oss.setup.direct;
1764         if (!direct)
1765                 return AFMT_MU_LAW | AFMT_U8 |
1766                        AFMT_S16_LE | AFMT_S16_BE |
1767                        AFMT_S8 | AFMT_U16_LE |
1768                        AFMT_U16_BE |
1769                         AFMT_S32_LE | AFMT_S32_BE |
1770                         AFMT_S24_LE | AFMT_S24_BE |
1771                         AFMT_S24_PACKED;
1772         params = kmalloc(sizeof(*params), GFP_KERNEL);
1773         if (!params)
1774                 return -ENOMEM;
1775         _snd_pcm_hw_params_any(params);
1776         err = snd_pcm_hw_refine(substream, params);
1777         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1778         kfree(params);
1779         if (err < 0)
1780                 return err;
1781         for (fmt = 0; fmt < 32; ++fmt) {
1782                 if (snd_mask_test(&format_mask, fmt)) {
1783                         int f = snd_pcm_oss_format_to(fmt);
1784                         if (f >= 0)
1785                                 formats |= f;
1786                 }
1787         }
1788         return formats;
1789 }
1790
1791 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1792 {
1793         int formats, idx;
1794
1795         if (format != AFMT_QUERY) {
1796                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1797                 if (formats < 0)
1798                         return formats;
1799                 if (!(formats & format))
1800                         format = AFMT_U8;
1801                 for (idx = 1; idx >= 0; --idx) {
1802                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1803                         struct snd_pcm_runtime *runtime;
1804                         if (substream == NULL)
1805                                 continue;
1806                         runtime = substream->runtime;
1807                         if (runtime->oss.format != format) {
1808                                 runtime->oss.params = 1;
1809                                 runtime->oss.format = format;
1810                         }
1811                 }
1812         }
1813         return snd_pcm_oss_get_format(pcm_oss_file);
1814 }
1815
1816 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1817 {
1818         struct snd_pcm_substream *substream;
1819         int err;
1820
1821         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1822                 return err;
1823         return substream->runtime->oss.format;
1824 }
1825
1826 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1827 {
1828         struct snd_pcm_runtime *runtime;
1829
1830         if (substream == NULL)
1831                 return 0;
1832         runtime = substream->runtime;
1833         if (subdivide == 0) {
1834                 subdivide = runtime->oss.subdivision;
1835                 if (subdivide == 0)
1836                         subdivide = 1;
1837                 return subdivide;
1838         }
1839         if (runtime->oss.subdivision || runtime->oss.fragshift)
1840                 return -EINVAL;
1841         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1842             subdivide != 8 && subdivide != 16)
1843                 return -EINVAL;
1844         runtime->oss.subdivision = subdivide;
1845         runtime->oss.params = 1;
1846         return subdivide;
1847 }
1848
1849 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1850 {
1851         int err = -EINVAL, idx;
1852
1853         for (idx = 1; idx >= 0; --idx) {
1854                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1855                 if (substream == NULL)
1856                         continue;
1857                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1858                         return err;
1859         }
1860         return err;
1861 }
1862
1863 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1864 {
1865         struct snd_pcm_runtime *runtime;
1866
1867         if (substream == NULL)
1868                 return 0;
1869         runtime = substream->runtime;
1870         if (runtime->oss.subdivision || runtime->oss.fragshift)
1871                 return -EINVAL;
1872         runtime->oss.fragshift = val & 0xffff;
1873         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1874         if (runtime->oss.fragshift < 4)         /* < 16 */
1875                 runtime->oss.fragshift = 4;
1876         if (runtime->oss.maxfrags < 2)
1877                 runtime->oss.maxfrags = 2;
1878         runtime->oss.params = 1;
1879         return 0;
1880 }
1881
1882 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1883 {
1884         int err = -EINVAL, idx;
1885
1886         for (idx = 1; idx >= 0; --idx) {
1887                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1888                 if (substream == NULL)
1889                         continue;
1890                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1891                         return err;
1892         }
1893         return err;
1894 }
1895
1896 static int snd_pcm_oss_nonblock(struct file * file)
1897 {
1898         file->f_flags |= O_NONBLOCK;
1899         return 0;
1900 }
1901
1902 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1903 {
1904
1905         if (substream == NULL) {
1906                 res &= ~DSP_CAP_DUPLEX;
1907                 return res;
1908         }
1909 #ifdef DSP_CAP_MULTI
1910         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1911                 if (substream->pstr->substream_count > 1)
1912                         res |= DSP_CAP_MULTI;
1913 #endif
1914         /* DSP_CAP_REALTIME is set all times: */
1915         /* all ALSA drivers can return actual pointer in ring buffer */
1916 #if defined(DSP_CAP_REALTIME) && 0
1917         {
1918                 struct snd_pcm_runtime *runtime = substream->runtime;
1919                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1920                         res &= ~DSP_CAP_REALTIME;
1921         }
1922 #endif
1923         return res;
1924 }
1925
1926 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1927 {
1928         int result, idx;
1929
1930         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1931         for (idx = 0; idx < 2; idx++) {
1932                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1933                 result = snd_pcm_oss_get_caps1(substream, result);
1934         }
1935         result |= 0x0001;       /* revision - same as SB AWE 64 */
1936         return result;
1937 }
1938
1939 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1940 {
1941         struct snd_pcm_runtime *runtime = substream->runtime;
1942         snd_pcm_uframes_t appl_ptr;
1943         appl_ptr = hw_ptr + runtime->buffer_size;
1944         appl_ptr %= runtime->boundary;
1945         runtime->control->appl_ptr = appl_ptr;
1946 }
1947
1948 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1949 {
1950         struct snd_pcm_runtime *runtime;
1951         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1952         int err, cmd;
1953
1954 #ifdef OSS_DEBUG
1955         printk("pcm_oss: trigger = 0x%x\n", trigger);
1956 #endif
1957
1958         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1959         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1960
1961         if (psubstream) {
1962                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1963                         return err;
1964         }
1965         if (csubstream) {
1966                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1967                         return err;
1968         }
1969         if (psubstream) {
1970                 runtime = psubstream->runtime;
1971                 if (trigger & PCM_ENABLE_OUTPUT) {
1972                         if (runtime->oss.trigger)
1973                                 goto _skip1;
1974                         if (atomic_read(&psubstream->mmap_count))
1975                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1976                         runtime->oss.trigger = 1;
1977                         runtime->start_threshold = 1;
1978                         cmd = SNDRV_PCM_IOCTL_START;
1979                 } else {
1980                         if (!runtime->oss.trigger)
1981                                 goto _skip1;
1982                         runtime->oss.trigger = 0;
1983                         runtime->start_threshold = runtime->boundary;
1984                         cmd = SNDRV_PCM_IOCTL_DROP;
1985                         runtime->oss.prepare = 1;
1986                 }
1987                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1988                 if (err < 0)
1989                         return err;
1990         }
1991  _skip1:
1992         if (csubstream) {
1993                 runtime = csubstream->runtime;
1994                 if (trigger & PCM_ENABLE_INPUT) {
1995                         if (runtime->oss.trigger)
1996                                 goto _skip2;
1997                         runtime->oss.trigger = 1;
1998                         runtime->start_threshold = 1;
1999                         cmd = SNDRV_PCM_IOCTL_START;
2000                 } else {
2001                         if (!runtime->oss.trigger)
2002                                 goto _skip2;
2003                         runtime->oss.trigger = 0;
2004                         runtime->start_threshold = runtime->boundary;
2005                         cmd = SNDRV_PCM_IOCTL_DROP;
2006                         runtime->oss.prepare = 1;
2007                 }
2008                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2009                 if (err < 0)
2010                         return err;
2011         }
2012  _skip2:
2013         return 0;
2014 }
2015
2016 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2017 {
2018         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2019         int result = 0;
2020
2021         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2022         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2023         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2024                 result |= PCM_ENABLE_OUTPUT;
2025         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2026                 result |= PCM_ENABLE_INPUT;
2027         return result;
2028 }
2029
2030 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2031 {
2032         struct snd_pcm_substream *substream;
2033         struct snd_pcm_runtime *runtime;
2034         snd_pcm_sframes_t delay;
2035         int err;
2036
2037         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2038         if (substream == NULL)
2039                 return -EINVAL;
2040         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2041                 return err;
2042         runtime = substream->runtime;
2043         if (runtime->oss.params || runtime->oss.prepare)
2044                 return 0;
2045         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2046         if (err == -EPIPE)
2047                 delay = 0;      /* hack for broken OSS applications */
2048         else if (err < 0)
2049                 return err;
2050         return snd_pcm_oss_bytes(substream, delay);
2051 }
2052
2053 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2054 {
2055         struct snd_pcm_substream *substream;
2056         struct snd_pcm_runtime *runtime;
2057         snd_pcm_sframes_t delay;
2058         int fixup;
2059         struct count_info info;
2060         int err;
2061
2062         if (_info == NULL)
2063                 return -EFAULT;
2064         substream = pcm_oss_file->streams[stream];
2065         if (substream == NULL)
2066                 return -EINVAL;
2067         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2068                 return err;
2069         runtime = substream->runtime;
2070         if (runtime->oss.params || runtime->oss.prepare) {
2071                 memset(&info, 0, sizeof(info));
2072                 if (copy_to_user(_info, &info, sizeof(info)))
2073                         return -EFAULT;
2074                 return 0;
2075         }
2076         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2077                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2078                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2079                         err = 0;
2080                         delay = 0;
2081                         fixup = 0;
2082                 } else {
2083                         fixup = runtime->oss.buffer_used;
2084                 }
2085         } else {
2086                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2087                 fixup = -runtime->oss.buffer_used;
2088         }
2089         if (err < 0)
2090                 return err;
2091         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2092         if (atomic_read(&substream->mmap_count)) {
2093                 snd_pcm_sframes_t n;
2094                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2095                 if (n < 0)
2096                         n += runtime->boundary;
2097                 info.blocks = n / runtime->period_size;
2098                 runtime->oss.prev_hw_ptr_interrupt = delay;
2099                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2100                         snd_pcm_oss_simulate_fill(substream, delay);
2101                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2102         } else {
2103                 delay = snd_pcm_oss_bytes(substream, delay);
2104                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2105                         if (substream->oss.setup.buggyptr)
2106                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2107                         else
2108                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2109                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2110                 } else {
2111                         delay += fixup;
2112                         info.blocks = delay / runtime->oss.period_bytes;
2113                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2114                 }
2115         }
2116         if (copy_to_user(_info, &info, sizeof(info)))
2117                 return -EFAULT;
2118         return 0;
2119 }
2120
2121 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2122 {
2123         struct snd_pcm_substream *substream;
2124         struct snd_pcm_runtime *runtime;
2125         snd_pcm_sframes_t avail;
2126         int fixup;
2127         struct audio_buf_info info;
2128         int err;
2129
2130         if (_info == NULL)
2131                 return -EFAULT;
2132         substream = pcm_oss_file->streams[stream];
2133         if (substream == NULL)
2134                 return -EINVAL;
2135         runtime = substream->runtime;
2136
2137         if (runtime->oss.params &&
2138             (err = snd_pcm_oss_change_params(substream)) < 0)
2139                 return err;
2140
2141         info.fragsize = runtime->oss.period_bytes;
2142         info.fragstotal = runtime->periods;
2143         if (runtime->oss.prepare) {
2144                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2145                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2146                         info.fragments = runtime->oss.periods;
2147                 } else {
2148                         info.bytes = 0;
2149                         info.fragments = 0;
2150                 }
2151         } else {
2152                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2153                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2154                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2155                                 avail = runtime->buffer_size;
2156                                 err = 0;
2157                                 fixup = 0;
2158                         } else {
2159                                 avail = runtime->buffer_size - avail;
2160                                 fixup = -runtime->oss.buffer_used;
2161                         }
2162                 } else {
2163                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2164                         fixup = runtime->oss.buffer_used;
2165                 }
2166                 if (err < 0)
2167                         return err;
2168                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2169                 info.fragments = info.bytes / runtime->oss.period_bytes;
2170         }
2171
2172 #ifdef OSS_DEBUG
2173         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2174 #endif
2175         if (copy_to_user(_info, &info, sizeof(info)))
2176                 return -EFAULT;
2177         return 0;
2178 }
2179
2180 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2181 {
2182         // it won't be probably implemented
2183         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2184         return -EINVAL;
2185 }
2186
2187 static const char *strip_task_path(const char *path)
2188 {
2189         const char *ptr, *ptrl = NULL;
2190         for (ptr = path; *ptr; ptr++) {
2191                 if (*ptr == '/')
2192                         ptrl = ptr + 1;
2193         }
2194         return ptrl;
2195 }
2196
2197 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2198                                       const char *task_name,
2199                                       struct snd_pcm_oss_setup *rsetup)
2200 {
2201         struct snd_pcm_oss_setup *setup;
2202
2203         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2204         do {
2205                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2206                      setup = setup->next) {
2207                         if (!strcmp(setup->task_name, task_name))
2208                                 goto out;
2209                 }
2210         } while ((task_name = strip_task_path(task_name)) != NULL);
2211  out:
2212         if (setup)
2213                 *rsetup = *setup;
2214         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2215 }
2216
2217 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2218 {
2219         struct snd_pcm_runtime *runtime;
2220         runtime = substream->runtime;
2221         vfree(runtime->oss.buffer);
2222         runtime->oss.buffer = NULL;
2223 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2224         snd_pcm_oss_plugin_clear(substream);
2225 #endif
2226         substream->oss.oss = 0;
2227 }
2228
2229 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2230                                        struct snd_pcm_oss_setup *setup,
2231                                        int minor)
2232 {
2233         struct snd_pcm_runtime *runtime;
2234
2235         substream->oss.oss = 1;
2236         substream->oss.setup = *setup;
2237         if (setup->nonblock)
2238                 substream->f_flags |= O_NONBLOCK;
2239         else if (setup->block)
2240                 substream->f_flags &= ~O_NONBLOCK;
2241         runtime = substream->runtime;
2242         runtime->oss.params = 1;
2243         runtime->oss.trigger = 1;
2244         runtime->oss.rate = 8000;
2245         mutex_init(&runtime->oss.params_lock);
2246         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2247         case SNDRV_MINOR_OSS_PCM_8:
2248                 runtime->oss.format = AFMT_U8;
2249                 break;
2250         case SNDRV_MINOR_OSS_PCM_16:
2251                 runtime->oss.format = AFMT_S16_LE;
2252                 break;
2253         default:
2254                 runtime->oss.format = AFMT_MU_LAW;
2255         }
2256         runtime->oss.channels = 1;
2257         runtime->oss.fragshift = 0;
2258         runtime->oss.maxfrags = 0;
2259         runtime->oss.subdivision = 0;
2260         substream->pcm_release = snd_pcm_oss_release_substream;
2261 }
2262
2263 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2264 {
2265         int cidx;
2266         if (!pcm_oss_file)
2267                 return 0;
2268         for (cidx = 0; cidx < 2; ++cidx) {
2269                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2270                 if (substream)
2271                         snd_pcm_release_substream(substream);
2272         }
2273         kfree(pcm_oss_file);
2274         return 0;
2275 }
2276
2277 static int snd_pcm_oss_open_file(struct file *file,
2278                                  struct snd_pcm *pcm,
2279                                  struct snd_pcm_oss_file **rpcm_oss_file,
2280                                  int minor,
2281                                  struct snd_pcm_oss_setup *setup)
2282 {
2283         int idx, err;
2284         struct snd_pcm_oss_file *pcm_oss_file;
2285         struct snd_pcm_substream *substream;
2286         fmode_t f_mode = file->f_mode;
2287
2288         if (rpcm_oss_file)
2289                 *rpcm_oss_file = NULL;
2290
2291         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2292         if (pcm_oss_file == NULL)
2293                 return -ENOMEM;
2294
2295         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2296             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2297                 f_mode = FMODE_WRITE;
2298
2299         file->f_flags &= ~O_APPEND;
2300         for (idx = 0; idx < 2; idx++) {
2301                 if (setup[idx].disable)
2302                         continue;
2303                 if (! pcm->streams[idx].substream_count)
2304                         continue; /* no matching substream */
2305                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2306                         if (! (f_mode & FMODE_WRITE))
2307                                 continue;
2308                 } else {
2309                         if (! (f_mode & FMODE_READ))
2310                                 continue;
2311                 }
2312                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2313                 if (err < 0) {
2314                         snd_pcm_oss_release_file(pcm_oss_file);
2315                         return err;
2316                 }
2317
2318                 pcm_oss_file->streams[idx] = substream;
2319                 substream->file = pcm_oss_file;
2320                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2321         }
2322
2323         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2324                 snd_pcm_oss_release_file(pcm_oss_file);
2325                 return -EINVAL;
2326         }
2327
2328         file->private_data = pcm_oss_file;
2329         if (rpcm_oss_file)
2330                 *rpcm_oss_file = pcm_oss_file;
2331         return 0;
2332 }
2333
2334
2335 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2336 {
2337         unsigned int idx;
2338
2339         if (snd_BUG_ON(!task || !name || size < 2))
2340                 return -EINVAL;
2341         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2342                 name[idx] = task->comm[idx];
2343         name[idx] = '\0';
2344         return 0;
2345 }
2346
2347 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2348 {
2349         int err;
2350         char task_name[32];
2351         struct snd_pcm *pcm;
2352         struct snd_pcm_oss_file *pcm_oss_file;
2353         struct snd_pcm_oss_setup setup[2];
2354         int nonblock;
2355         wait_queue_t wait;
2356
2357         pcm = snd_lookup_oss_minor_data(iminor(inode),
2358                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2359         if (pcm == NULL) {
2360                 err = -ENODEV;
2361                 goto __error1;
2362         }
2363         err = snd_card_file_add(pcm->card, file);
2364         if (err < 0)
2365                 goto __error1;
2366         if (!try_module_get(pcm->card->module)) {
2367                 err = -EFAULT;
2368                 goto __error2;
2369         }
2370         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2371                 err = -EFAULT;
2372                 goto __error;
2373         }
2374         memset(setup, 0, sizeof(setup));
2375         if (file->f_mode & FMODE_WRITE)
2376                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2377                                            task_name, &setup[0]);
2378         if (file->f_mode & FMODE_READ)
2379                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2380                                            task_name, &setup[1]);
2381
2382         nonblock = !!(file->f_flags & O_NONBLOCK);
2383         if (!nonblock)
2384                 nonblock = nonblock_open;
2385
2386         init_waitqueue_entry(&wait, current);
2387         add_wait_queue(&pcm->open_wait, &wait);
2388         mutex_lock(&pcm->open_mutex);
2389         while (1) {
2390                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2391                                             iminor(inode), setup);
2392                 if (err >= 0)
2393                         break;
2394                 if (err == -EAGAIN) {
2395                         if (nonblock) {
2396                                 err = -EBUSY;
2397                                 break;
2398                         }
2399                 } else
2400                         break;
2401                 set_current_state(TASK_INTERRUPTIBLE);
2402                 mutex_unlock(&pcm->open_mutex);
2403                 schedule();
2404                 mutex_lock(&pcm->open_mutex);
2405                 if (signal_pending(current)) {
2406                         err = -ERESTARTSYS;
2407                         break;
2408                 }
2409         }
2410         remove_wait_queue(&pcm->open_wait, &wait);
2411         mutex_unlock(&pcm->open_mutex);
2412         if (err < 0)
2413                 goto __error;
2414         return err;
2415
2416       __error:
2417         module_put(pcm->card->module);
2418       __error2:
2419         snd_card_file_remove(pcm->card, file);
2420       __error1:
2421         return err;
2422 }
2423
2424 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2425 {
2426         struct snd_pcm *pcm;
2427         struct snd_pcm_substream *substream;
2428         struct snd_pcm_oss_file *pcm_oss_file;
2429
2430         pcm_oss_file = file->private_data;
2431         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2432         if (substream == NULL)
2433                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2434         if (snd_BUG_ON(!substream))
2435                 return -ENXIO;
2436         pcm = substream->pcm;
2437         if (!pcm->card->shutdown)
2438                 snd_pcm_oss_sync(pcm_oss_file);
2439         mutex_lock(&pcm->open_mutex);
2440         snd_pcm_oss_release_file(pcm_oss_file);
2441         mutex_unlock(&pcm->open_mutex);
2442         wake_up(&pcm->open_wait);
2443         module_put(pcm->card->module);
2444         snd_card_file_remove(pcm->card, file);
2445         return 0;
2446 }
2447
2448 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2449 {
2450         struct snd_pcm_oss_file *pcm_oss_file;
2451         int __user *p = (int __user *)arg;
2452         int res;
2453
2454         pcm_oss_file = file->private_data;
2455         if (cmd == OSS_GETVERSION)
2456                 return put_user(SNDRV_OSS_VERSION, p);
2457         if (cmd == OSS_ALSAEMULVER)
2458                 return put_user(1, p);
2459 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2460         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2461                 struct snd_pcm_substream *substream;
2462                 int idx;
2463                 for (idx = 0; idx < 2; ++idx) {
2464                         substream = pcm_oss_file->streams[idx];
2465                         if (substream != NULL)
2466                                 break;
2467                 }
2468                 if (snd_BUG_ON(idx >= 2))
2469                         return -ENXIO;
2470                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2471         }
2472 #endif
2473         if (((cmd >> 8) & 0xff) != 'P')
2474                 return -EINVAL;
2475 #ifdef OSS_DEBUG
2476         printk("pcm_oss: ioctl = 0x%x\n", cmd);
2477 #endif
2478         switch (cmd) {
2479         case SNDCTL_DSP_RESET:
2480                 return snd_pcm_oss_reset(pcm_oss_file);
2481         case SNDCTL_DSP_SYNC:
2482                 return snd_pcm_oss_sync(pcm_oss_file);
2483         case SNDCTL_DSP_SPEED:
2484                 if (get_user(res, p))
2485                         return -EFAULT;
2486                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2487                         return res;
2488                 return put_user(res, p);
2489         case SOUND_PCM_READ_RATE:
2490                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2491                 if (res < 0)
2492                         return res;
2493                 return put_user(res, p);
2494         case SNDCTL_DSP_STEREO:
2495                 if (get_user(res, p))
2496                         return -EFAULT;
2497                 res = res > 0 ? 2 : 1;
2498                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2499                         return res;
2500                 return put_user(--res, p);
2501         case SNDCTL_DSP_GETBLKSIZE:
2502                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2503                 if (res < 0)
2504                         return res;
2505                 return put_user(res, p);
2506         case SNDCTL_DSP_SETFMT:
2507                 if (get_user(res, p))
2508                         return -EFAULT;
2509                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2510                 if (res < 0)
2511                         return res;
2512                 return put_user(res, p);
2513         case SOUND_PCM_READ_BITS:
2514                 res = snd_pcm_oss_get_format(pcm_oss_file);
2515                 if (res < 0)
2516                         return res;
2517                 return put_user(res, p);
2518         case SNDCTL_DSP_CHANNELS:
2519                 if (get_user(res, p))
2520                         return -EFAULT;
2521                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2522                 if (res < 0)
2523                         return res;
2524                 return put_user(res, p);
2525         case SOUND_PCM_READ_CHANNELS:
2526                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2527                 if (res < 0)
2528                         return res;
2529                 return put_user(res, p);
2530         case SOUND_PCM_WRITE_FILTER:
2531         case SOUND_PCM_READ_FILTER:
2532                 return -EIO;
2533         case SNDCTL_DSP_POST:
2534                 return snd_pcm_oss_post(pcm_oss_file);
2535         case SNDCTL_DSP_SUBDIVIDE:
2536                 if (get_user(res, p))
2537                         return -EFAULT;
2538                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2539                 if (res < 0)
2540                         return res;
2541                 return put_user(res, p);
2542         case SNDCTL_DSP_SETFRAGMENT:
2543                 if (get_user(res, p))
2544                         return -EFAULT;
2545                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2546         case SNDCTL_DSP_GETFMTS:
2547                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2548                 if (res < 0)
2549                         return res;
2550                 return put_user(res, p);
2551         case SNDCTL_DSP_GETOSPACE:
2552         case SNDCTL_DSP_GETISPACE:
2553                 return snd_pcm_oss_get_space(pcm_oss_file,
2554                         cmd == SNDCTL_DSP_GETISPACE ?
2555                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2556                         (struct audio_buf_info __user *) arg);
2557         case SNDCTL_DSP_NONBLOCK:
2558                 return snd_pcm_oss_nonblock(file);
2559         case SNDCTL_DSP_GETCAPS:
2560                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2561                 if (res < 0)
2562                         return res;
2563                 return put_user(res, p);
2564         case SNDCTL_DSP_GETTRIGGER:
2565                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2566                 if (res < 0)
2567                         return res;
2568                 return put_user(res, p);
2569         case SNDCTL_DSP_SETTRIGGER:
2570                 if (get_user(res, p))
2571                         return -EFAULT;
2572                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2573         case SNDCTL_DSP_GETIPTR:
2574         case SNDCTL_DSP_GETOPTR:
2575                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2576                         cmd == SNDCTL_DSP_GETIPTR ?
2577                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2578                         (struct count_info __user *) arg);
2579         case SNDCTL_DSP_MAPINBUF:
2580         case SNDCTL_DSP_MAPOUTBUF:
2581                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2582                         cmd == SNDCTL_DSP_MAPINBUF ?
2583                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2584                         (struct buffmem_desc __user *) arg);
2585         case SNDCTL_DSP_SETSYNCRO:
2586                 /* stop DMA now.. */
2587                 return 0;
2588         case SNDCTL_DSP_SETDUPLEX:
2589                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2590                         return 0;
2591                 return -EIO;
2592         case SNDCTL_DSP_GETODELAY:
2593                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2594                 if (res < 0) {
2595                         /* it's for sure, some broken apps don't check for error codes */
2596                         put_user(0, p);
2597                         return res;
2598                 }
2599                 return put_user(res, p);
2600         case SNDCTL_DSP_PROFILE:
2601                 return 0;       /* silently ignore */
2602         default:
2603                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2604         }
2605         return -EINVAL;
2606 }
2607
2608 #ifdef CONFIG_COMPAT
2609 /* all compatible */
2610 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2611 #else
2612 #define snd_pcm_oss_ioctl_compat        NULL
2613 #endif
2614
2615 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2616 {
2617         struct snd_pcm_oss_file *pcm_oss_file;
2618         struct snd_pcm_substream *substream;
2619
2620         pcm_oss_file = file->private_data;
2621         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2622         if (substream == NULL)
2623                 return -ENXIO;
2624         substream->f_flags = file->f_flags & O_NONBLOCK;
2625 #ifndef OSS_DEBUG
2626         return snd_pcm_oss_read1(substream, buf, count);
2627 #else
2628         {
2629                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2630                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2631                 return res;
2632         }
2633 #endif
2634 }
2635
2636 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2637 {
2638         struct snd_pcm_oss_file *pcm_oss_file;
2639         struct snd_pcm_substream *substream;
2640         long result;
2641
2642         pcm_oss_file = file->private_data;
2643         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2644         if (substream == NULL)
2645                 return -ENXIO;
2646         substream->f_flags = file->f_flags & O_NONBLOCK;
2647         result = snd_pcm_oss_write1(substream, buf, count);
2648 #ifdef OSS_DEBUG
2649         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2650 #endif
2651         return result;
2652 }
2653
2654 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2655 {
2656         struct snd_pcm_runtime *runtime = substream->runtime;
2657         if (atomic_read(&substream->mmap_count))
2658                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2659         else
2660                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2661 }
2662
2663 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2664 {
2665         struct snd_pcm_runtime *runtime = substream->runtime;
2666         if (atomic_read(&substream->mmap_count))
2667                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2668         else
2669                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2670 }
2671
2672 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2673 {
2674         struct snd_pcm_oss_file *pcm_oss_file;
2675         unsigned int mask;
2676         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2677
2678         pcm_oss_file = file->private_data;
2679
2680         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2681         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2682
2683         mask = 0;
2684         if (psubstream != NULL) {
2685                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2686                 poll_wait(file, &runtime->sleep, wait);
2687                 snd_pcm_stream_lock_irq(psubstream);
2688                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2689                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2690                      snd_pcm_oss_playback_ready(psubstream)))
2691                         mask |= POLLOUT | POLLWRNORM;
2692                 snd_pcm_stream_unlock_irq(psubstream);
2693         }
2694         if (csubstream != NULL) {
2695                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2696                 snd_pcm_state_t ostate;
2697                 poll_wait(file, &runtime->sleep, wait);
2698                 snd_pcm_stream_lock_irq(csubstream);
2699                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2700                     snd_pcm_oss_capture_ready(csubstream))
2701                         mask |= POLLIN | POLLRDNORM;
2702                 snd_pcm_stream_unlock_irq(csubstream);
2703                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2704                         struct snd_pcm_oss_file ofile;
2705                         memset(&ofile, 0, sizeof(ofile));
2706                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2707                         runtime->oss.trigger = 0;
2708                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2709                 }
2710         }
2711
2712         return mask;
2713 }
2714
2715 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2716 {
2717         struct snd_pcm_oss_file *pcm_oss_file;
2718         struct snd_pcm_substream *substream = NULL;
2719         struct snd_pcm_runtime *runtime;
2720         int err;
2721
2722 #ifdef OSS_DEBUG
2723         printk("pcm_oss: mmap begin\n");
2724 #endif
2725         pcm_oss_file = file->private_data;
2726         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2727         case VM_READ | VM_WRITE:
2728                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2729                 if (substream)
2730                         break;
2731                 /* Fall through */
2732         case VM_READ:
2733                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2734                 break;
2735         case VM_WRITE:
2736                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2737                 break;
2738         default:
2739                 return -EINVAL;
2740         }
2741         /* set VM_READ access as well to fix memset() routines that do
2742            reads before writes (to improve performance) */
2743         area->vm_flags |= VM_READ;
2744         if (substream == NULL)
2745                 return -ENXIO;
2746         runtime = substream->runtime;
2747         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2748                 return -EIO;
2749         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2750                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2751         else
2752                 return -EIO;
2753
2754         if (runtime->oss.params) {
2755                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2756                         return err;
2757         }
2758 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2759         if (runtime->oss.plugin_first != NULL)
2760                 return -EIO;
2761 #endif
2762
2763         if (area->vm_pgoff != 0)
2764                 return -EINVAL;
2765
2766         err = snd_pcm_mmap_data(substream, file, area);
2767         if (err < 0)
2768                 return err;
2769         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2770         runtime->silence_threshold = 0;
2771         runtime->silence_size = 0;
2772 #ifdef OSS_DEBUG
2773         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2774 #endif
2775         /* In mmap mode we never stop */
2776         runtime->stop_threshold = runtime->boundary;
2777
2778         return 0;
2779 }
2780
2781 #ifdef CONFIG_SND_VERBOSE_PROCFS
2782 /*
2783  *  /proc interface
2784  */
2785
2786 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2787                                   struct snd_info_buffer *buffer)
2788 {
2789         struct snd_pcm_str *pstr = entry->private_data;
2790         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2791         mutex_lock(&pstr->oss.setup_mutex);
2792         while (setup) {
2793                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2794                             setup->task_name,
2795                             setup->periods,
2796                             setup->period_size,
2797                             setup->disable ? " disable" : "",
2798                             setup->direct ? " direct" : "",
2799                             setup->block ? " block" : "",
2800                             setup->nonblock ? " non-block" : "",
2801                             setup->partialfrag ? " partial-frag" : "",
2802                             setup->nosilence ? " no-silence" : "");
2803                 setup = setup->next;
2804         }
2805         mutex_unlock(&pstr->oss.setup_mutex);
2806 }
2807
2808 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2809 {
2810         struct snd_pcm_oss_setup *setup, *setupn;
2811
2812         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2813              setup; setup = setupn) {
2814                 setupn = setup->next;
2815                 kfree(setup->task_name);
2816                 kfree(setup);
2817         }
2818         pstr->oss.setup_list = NULL;
2819 }
2820
2821 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2822                                    struct snd_info_buffer *buffer)
2823 {
2824         struct snd_pcm_str *pstr = entry->private_data;
2825         char line[128], str[32], task_name[32], *ptr;
2826         int idx1;
2827         struct snd_pcm_oss_setup *setup, *setup1, template;
2828
2829         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2830                 mutex_lock(&pstr->oss.setup_mutex);
2831                 memset(&template, 0, sizeof(template));
2832                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2833                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2834                         snd_pcm_oss_proc_free_setup_list(pstr);
2835                         mutex_unlock(&pstr->oss.setup_mutex);
2836                         continue;
2837                 }
2838                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2839                         if (!strcmp(setup->task_name, task_name)) {
2840                                 template = *setup;
2841                                 break;
2842                         }
2843                 }
2844                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2845                 template.periods = simple_strtoul(str, NULL, 10);
2846                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2847                 template.period_size = simple_strtoul(str, NULL, 10);
2848                 for (idx1 = 31; idx1 >= 0; idx1--)
2849                         if (template.period_size & (1 << idx1))
2850                                 break;
2851                 for (idx1--; idx1 >= 0; idx1--)
2852                         template.period_size &= ~(1 << idx1);
2853                 do {
2854                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2855                         if (!strcmp(str, "disable")) {
2856                                 template.disable = 1;
2857                         } else if (!strcmp(str, "direct")) {
2858                                 template.direct = 1;
2859                         } else if (!strcmp(str, "block")) {
2860                                 template.block = 1;
2861                         } else if (!strcmp(str, "non-block")) {
2862                                 template.nonblock = 1;
2863                         } else if (!strcmp(str, "partial-frag")) {
2864                                 template.partialfrag = 1;
2865                         } else if (!strcmp(str, "no-silence")) {
2866                                 template.nosilence = 1;
2867                         } else if (!strcmp(str, "buggy-ptr")) {
2868                                 template.buggyptr = 1;
2869                         }
2870                 } while (*str);
2871                 if (setup == NULL) {
2872                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2873                         if (! setup) {
2874                                 buffer->error = -ENOMEM;
2875                                 mutex_lock(&pstr->oss.setup_mutex);
2876                                 return;
2877                         }
2878                         if (pstr->oss.setup_list == NULL)
2879                                 pstr->oss.setup_list = setup;
2880                         else {
2881                                 for (setup1 = pstr->oss.setup_list;
2882                                      setup1->next; setup1 = setup1->next);
2883                                 setup1->next = setup;
2884                         }
2885                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2886                         if (! template.task_name) {
2887                                 kfree(setup);
2888                                 buffer->error = -ENOMEM;
2889                                 mutex_lock(&pstr->oss.setup_mutex);
2890                                 return;
2891                         }
2892                 }
2893                 *setup = template;
2894                 mutex_unlock(&pstr->oss.setup_mutex);
2895         }
2896 }
2897
2898 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2899 {
2900         int stream;
2901         for (stream = 0; stream < 2; ++stream) {
2902                 struct snd_info_entry *entry;
2903                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2904                 if (pstr->substream_count == 0)
2905                         continue;
2906                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2907                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2908                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2909                         entry->c.text.read = snd_pcm_oss_proc_read;
2910                         entry->c.text.write = snd_pcm_oss_proc_write;
2911                         entry->private_data = pstr;
2912                         if (snd_info_register(entry) < 0) {
2913                                 snd_info_free_entry(entry);
2914                                 entry = NULL;
2915                         }
2916                 }
2917                 pstr->oss.proc_entry = entry;
2918         }
2919 }
2920
2921 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2922 {
2923         int stream;
2924         for (stream = 0; stream < 2; ++stream) {
2925                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2926                 snd_info_free_entry(pstr->oss.proc_entry);
2927                 pstr->oss.proc_entry = NULL;
2928                 snd_pcm_oss_proc_free_setup_list(pstr);
2929         }
2930 }
2931 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2932 #define snd_pcm_oss_proc_init(pcm)
2933 #define snd_pcm_oss_proc_done(pcm)
2934 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2935
2936 /*
2937  *  ENTRY functions
2938  */
2939
2940 static const struct file_operations snd_pcm_oss_f_reg =
2941 {
2942         .owner =        THIS_MODULE,
2943         .read =         snd_pcm_oss_read,
2944         .write =        snd_pcm_oss_write,
2945         .open =         snd_pcm_oss_open,
2946         .release =      snd_pcm_oss_release,
2947         .poll =         snd_pcm_oss_poll,
2948         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2949         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2950         .mmap =         snd_pcm_oss_mmap,
2951 };
2952
2953 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2954 {
2955         char name[128];
2956         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2957         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2958                                     pcm->card, index, &snd_pcm_oss_f_reg,
2959                                     pcm, name) < 0) {
2960                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2961                            pcm->card->number, pcm->device);
2962         }
2963 }
2964
2965 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2966 {
2967         pcm->oss.reg = 0;
2968         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2969                 char name[128];
2970                 int duplex;
2971                 register_oss_dsp(pcm, 0);
2972                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2973                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2974                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2975                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2976 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2977                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2978                                       pcm->card->number,
2979                                       name);
2980 #endif
2981                 pcm->oss.reg++;
2982                 pcm->oss.reg_mask |= 1;
2983         }
2984         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2985                 register_oss_dsp(pcm, 1);
2986                 pcm->oss.reg++;
2987                 pcm->oss.reg_mask |= 2;
2988         }
2989
2990         if (pcm->oss.reg)
2991                 snd_pcm_oss_proc_init(pcm);
2992
2993         return 0;
2994 }
2995
2996 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2997 {
2998         if (pcm->oss.reg) {
2999                 if (pcm->oss.reg_mask & 1) {
3000                         pcm->oss.reg_mask &= ~1;
3001                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3002                                                   pcm->card, 0);
3003                 }
3004                 if (pcm->oss.reg_mask & 2) {
3005                         pcm->oss.reg_mask &= ~2;
3006                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3007                                                   pcm->card, 1);
3008                 }
3009                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3010 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3011                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3012 #endif
3013                 }
3014                 pcm->oss.reg = 0;
3015         }
3016         return 0;
3017 }
3018
3019 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3020 {
3021         snd_pcm_oss_disconnect_minor(pcm);
3022         snd_pcm_oss_proc_done(pcm);
3023         return 0;
3024 }
3025
3026 static struct snd_pcm_notify snd_pcm_oss_notify =
3027 {
3028         .n_register =   snd_pcm_oss_register_minor,
3029         .n_disconnect = snd_pcm_oss_disconnect_minor,
3030         .n_unregister = snd_pcm_oss_unregister_minor,
3031 };
3032
3033 static int __init alsa_pcm_oss_init(void)
3034 {
3035         int i;
3036         int err;
3037
3038         /* check device map table */
3039         for (i = 0; i < SNDRV_CARDS; i++) {
3040                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3041                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3042                                    i, dsp_map[i]);
3043                         dsp_map[i] = 0;
3044                 }
3045                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3046                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3047                                    i, adsp_map[i]);
3048                         adsp_map[i] = 1;
3049                 }
3050         }
3051         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3052                 return err;
3053         return 0;
3054 }
3055
3056 static void __exit alsa_pcm_oss_exit(void)
3057 {
3058         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3059 }
3060
3061 module_init(alsa_pcm_oss_init)
3062 module_exit(alsa_pcm_oss_exit)