git.oblomov.eu Git - linux-2.6/blob - sound/core/oss/pcm_oss.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer / OSS compatible
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #if 0
  23 #define PLUGIN_DEBUG
  24 #endif
  25 #if 0
  26 #define OSS_DEBUG
  27 #endif
  28
  29 #include <sound/driver.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/time.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/moduleparam.h>
  35 #include <linux/string.h>
  36 #include <sound/core.h>
  37 #include <sound/minors.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include "pcm_plugin.h"
  41 #include <sound/info.h>
  42 #include <linux/soundcard.h>
  43 #include <sound/initval.h>
  44
  45 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  46
  47 static int dsp_map[SNDRV_CARDS];
  48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  49 static int nonblock_open = 1;
  50
  51 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  53 MODULE_LICENSE("GPL");
  54 module_param_array(dsp_map, int, NULL, 0444);
  55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  56 module_param_array(adsp_map, int, NULL, 0444);
  57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  58 module_param(nonblock_open, bool, 0644);
  59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  62
  63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
  64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  67
  68 static inline mm_segment_t snd_enter_user(void)
  69 {
  70         mm_segment_t fs = get_fs();
  71         set_fs(get_ds());
  72         return fs;
  73 }
  74
  75 static inline void snd_leave_user(mm_segment_t fs)
  76 {
  77         set_fs(fs);
  78 }
  79
  80 /*
  81  * helper functions to process hw_params
  82  */
  83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
  84 {
  85         int changed = 0;
  86         if (i->min < min) {
  87                 i->min = min;
  88                 i->openmin = openmin;
  89                 changed = 1;
  90         } else if (i->min == min && !i->openmin && openmin) {
  91                 i->openmin = 1;
  92                 changed = 1;
  93         }
  94         if (i->integer) {
  95                 if (i->openmin) {
  96                         i->min++;
  97                         i->openmin = 0;
  98                 }
  99         }
 100         if (snd_interval_checkempty(i)) {
 101                 snd_interval_none(i);
 102                 return -EINVAL;
 103         }
 104         return changed;
 105 }
 106
 107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
 108 {
 109         int changed = 0;
 110         if (i->max > max) {
 111                 i->max = max;
 112                 i->openmax = openmax;
 113                 changed = 1;
 114         } else if (i->max == max && !i->openmax && openmax) {
 115                 i->openmax = 1;
 116                 changed = 1;
 117         }
 118         if (i->integer) {
 119                 if (i->openmax) {
 120                         i->max--;
 121                         i->openmax = 0;
 122                 }
 123         }
 124         if (snd_interval_checkempty(i)) {
 125                 snd_interval_none(i);
 126                 return -EINVAL;
 127         }
 128         return changed;
 129 }
 130
 131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
 132 {
 133         struct snd_interval t;
 134         t.empty = 0;
 135         t.min = t.max = val;
 136         t.openmin = t.openmax = 0;
 137         t.integer = 1;
 138         return snd_interval_refine(i, &t);
 139 }
 140
 141 /**
 142  * snd_pcm_hw_param_value_min
 143  * @params: the hw_params instance
 144  * @var: parameter to retrieve
 145  * @dir: pointer to the direction (-1,0,1) or NULL
 146  *
 147  * Return the minimum value for field PAR.
 148  */
 149 static unsigned int
 150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
 151                            snd_pcm_hw_param_t var, int *dir)
 152 {
 153         if (hw_is_mask(var)) {
 154                 if (dir)
 155                         *dir = 0;
 156                 return snd_mask_min(hw_param_mask_c(params, var));
 157         }
 158         if (hw_is_interval(var)) {
 159                 const struct snd_interval *i = hw_param_interval_c(params, var);
 160                 if (dir)
 161                         *dir = i->openmin;
 162                 return snd_interval_min(i);
 163         }
 164         return -EINVAL;
 165 }
 166
 167 /**
 168  * snd_pcm_hw_param_value_max
 169  * @params: the hw_params instance
 170  * @var: parameter to retrieve
 171  * @dir: pointer to the direction (-1,0,1) or NULL
 172  *
 173  * Return the maximum value for field PAR.
 174  */
 175 static unsigned int
 176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 177                            snd_pcm_hw_param_t var, int *dir)
 178 {
 179         if (hw_is_mask(var)) {
 180                 if (dir)
 181                         *dir = 0;
 182                 return snd_mask_max(hw_param_mask_c(params, var));
 183         }
 184         if (hw_is_interval(var)) {
 185                 const struct snd_interval *i = hw_param_interval_c(params, var);
 186                 if (dir)
 187                         *dir = - (int) i->openmax;
 188                 return snd_interval_max(i);
 189         }
 190         return -EINVAL;
 191 }
 192
 193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
 194                                   snd_pcm_hw_param_t var,
 195                                   const struct snd_mask *val)
 196 {
 197         int changed;
 198         changed = snd_mask_refine(hw_param_mask(params, var), val);
 199         if (changed) {
 200                 params->cmask |= 1 << var;
 201                 params->rmask |= 1 << var;
 202         }
 203         return changed;
 204 }
 205
 206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
 207                                  struct snd_pcm_hw_params *params,
 208                                  snd_pcm_hw_param_t var,
 209                                  const struct snd_mask *val)
 210 {
 211         int changed = _snd_pcm_hw_param_mask(params, var, val);
 212         if (changed < 0)
 213                 return changed;
 214         if (params->rmask) {
 215                 int err = snd_pcm_hw_refine(pcm, params);
 216                 if (err < 0)
 217                         return err;
 218         }
 219         return 0;
 220 }
 221
 222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
 223                                  snd_pcm_hw_param_t var, unsigned int val,
 224                                  int dir)
 225 {
 226         int changed;
 227         int open = 0;
 228         if (dir) {
 229                 if (dir > 0) {
 230                         open = 1;
 231                 } else if (dir < 0) {
 232                         if (val > 0) {
 233                                 open = 1;
 234                                 val--;
 235                         }
 236                 }
 237         }
 238         if (hw_is_mask(var))
 239                 changed = snd_mask_refine_min(hw_param_mask(params, var),
 240                                               val + !!open);
 241         else if (hw_is_interval(var))
 242                 changed = snd_interval_refine_min(hw_param_interval(params, var),
 243                                                   val, open);
 244         else
 245                 return -EINVAL;
 246         if (changed) {
 247                 params->cmask |= 1 << var;
 248                 params->rmask |= 1 << var;
 249         }
 250         return changed;
 251 }
 252
 253 /**
 254  * snd_pcm_hw_param_min
 255  * @pcm: PCM instance
 256  * @params: the hw_params instance
 257  * @var: parameter to retrieve
 258  * @val: minimal value
 259  * @dir: pointer to the direction (-1,0,1) or NULL
 260  *
 261  * Inside configuration space defined by PARAMS remove from PAR all
 262  * values < VAL. Reduce configuration space accordingly.
 263  * Return new minimum or -EINVAL if the configuration space is empty
 264  */
 265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
 266                                 struct snd_pcm_hw_params *params,
 267                                 snd_pcm_hw_param_t var, unsigned int val,
 268                                 int *dir)
 269 {
 270         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
 271         if (changed < 0)
 272                 return changed;
 273         if (params->rmask) {
 274                 int err = snd_pcm_hw_refine(pcm, params);
 275                 if (err < 0)
 276                         return err;
 277         }
 278         return snd_pcm_hw_param_value_min(params, var, dir);
 279 }
 280
 281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
 282                                  snd_pcm_hw_param_t var, unsigned int val,
 283                                  int dir)
 284 {
 285         int changed;
 286         int open = 0;
 287         if (dir) {
 288                 if (dir < 0) {
 289                         open = 1;
 290                 } else if (dir > 0) {
 291                         open = 1;
 292                         val++;
 293                 }
 294         }
 295         if (hw_is_mask(var)) {
 296                 if (val == 0 && open) {
 297                         snd_mask_none(hw_param_mask(params, var));
 298                         changed = -EINVAL;
 299                 } else
 300                         changed = snd_mask_refine_max(hw_param_mask(params, var),
 301                                                       val - !!open);
 302         } else if (hw_is_interval(var))
 303                 changed = snd_interval_refine_max(hw_param_interval(params, var),
 304                                                   val, open);
 305         else
 306                 return -EINVAL;
 307         if (changed) {
 308                 params->cmask |= 1 << var;
 309                 params->rmask |= 1 << var;
 310         }
 311         return changed;
 312 }
 313
 314 /**
 315  * snd_pcm_hw_param_max
 316  * @pcm: PCM instance
 317  * @params: the hw_params instance
 318  * @var: parameter to retrieve
 319  * @val: maximal value
 320  * @dir: pointer to the direction (-1,0,1) or NULL
 321  *
 322  * Inside configuration space defined by PARAMS remove from PAR all
 323  *  values >= VAL + 1. Reduce configuration space accordingly.
 324  *  Return new maximum or -EINVAL if the configuration space is empty
 325  */
 326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
 327                                 struct snd_pcm_hw_params *params,
 328                                 snd_pcm_hw_param_t var, unsigned int val,
 329                                 int *dir)
 330 {
 331         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
 332         if (changed < 0)
 333                 return changed;
 334         if (params->rmask) {
 335                 int err = snd_pcm_hw_refine(pcm, params);
 336                 if (err < 0)
 337                         return err;
 338         }
 339         return snd_pcm_hw_param_value_max(params, var, dir);
 340 }
 341
 342 static int boundary_sub(int a, int adir,
 343                         int b, int bdir,
 344                         int *c, int *cdir)
 345 {
 346         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
 347         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
 348         *c = a - b;
 349         *cdir = adir - bdir;
 350         if (*cdir == -2) {
 351                 (*c)--;
 352         } else if (*cdir == 2) {
 353                 (*c)++;
 354         }
 355         return 0;
 356 }
 357
 358 static int boundary_lt(unsigned int a, int adir,
 359                        unsigned int b, int bdir)
 360 {
 361         if (adir < 0) {
 362                 a--;
 363                 adir = 1;
 364         } else if (adir > 0)
 365                 adir = 1;
 366         if (bdir < 0) {
 367                 b--;
 368                 bdir = 1;
 369         } else if (bdir > 0)
 370                 bdir = 1;
 371         return a < b || (a == b && adir < bdir);
 372 }
 373
 374 /* Return 1 if min is nearer to best than max */
 375 static int boundary_nearer(int min, int mindir,
 376                            int best, int bestdir,
 377                            int max, int maxdir)
 378 {
 379         int dmin, dmindir;
 380         int dmax, dmaxdir;
 381         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
 382         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
 383         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
 384 }
 385
 386 /**
 387  * snd_pcm_hw_param_near
 388  * @pcm: PCM instance
 389  * @params: the hw_params instance
 390  * @var: parameter to retrieve
 391  * @best: value to set
 392  * @dir: pointer to the direction (-1,0,1) or NULL
 393  *
 394  * Inside configuration space defined by PARAMS set PAR to the available value
 395  * nearest to VAL. Reduce configuration space accordingly.
 396  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
 397  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
 398  * Return the value found.
 399   */
 400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 401                                  struct snd_pcm_hw_params *params,
 402                                  snd_pcm_hw_param_t var, unsigned int best,
 403                                  int *dir)
 404 {
 405         struct snd_pcm_hw_params *save = NULL;
 406         int v;
 407         unsigned int saved_min;
 408         int last = 0;
 409         int min, max;
 410         int mindir, maxdir;
 411         int valdir = dir ? *dir : 0;
 412         /* FIXME */
 413         if (best > INT_MAX)
 414                 best = INT_MAX;
 415         min = max = best;
 416         mindir = maxdir = valdir;
 417         if (maxdir > 0)
 418                 maxdir = 0;
 419         else if (maxdir == 0)
 420                 maxdir = -1;
 421         else {
 422                 maxdir = 1;
 423                 max--;
 424         }
 425         save = kmalloc(sizeof(*save), GFP_KERNEL);
 426         if (save == NULL)
 427                 return -ENOMEM;
 428         *save = *params;
 429         saved_min = min;
 430         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
 431         if (min >= 0) {
 432                 struct snd_pcm_hw_params *params1;
 433                 if (max < 0)
 434                         goto _end;
 435                 if ((unsigned int)min == saved_min && mindir == valdir)
 436                         goto _end;
 437                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
 438                 if (params1 == NULL) {
 439                         kfree(save);
 440                         return -ENOMEM;
 441                 }
 442                 *params1 = *save;
 443                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
 444                 if (max < 0) {
 445                         kfree(params1);
 446                         goto _end;
 447                 }
 448                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
 449                         *params = *params1;
 450                         last = 1;
 451                 }
 452                 kfree(params1);
 453         } else {
 454                 *params = *save;
 455                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
 456                 snd_assert(max >= 0, return -EINVAL);
 457                 last = 1;
 458         }
 459  _end:
 460         kfree(save);
 461         if (last)
 462                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 463         else
 464                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 465         snd_assert(v >= 0, return -EINVAL);
 466         return v;
 467 }
 468
 469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 470                                  snd_pcm_hw_param_t var, unsigned int val,
 471                                  int dir)
 472 {
 473         int changed;
 474         if (hw_is_mask(var)) {
 475                 struct snd_mask *m = hw_param_mask(params, var);
 476                 if (val == 0 && dir < 0) {
 477                         changed = -EINVAL;
 478                         snd_mask_none(m);
 479                 } else {
 480                         if (dir > 0)
 481                                 val++;
 482                         else if (dir < 0)
 483                                 val--;
 484                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 485                 }
 486         } else if (hw_is_interval(var)) {
 487                 struct snd_interval *i = hw_param_interval(params, var);
 488                 if (val == 0 && dir < 0) {
 489                         changed = -EINVAL;
 490                         snd_interval_none(i);
 491                 } else if (dir == 0)
 492                         changed = snd_interval_refine_set(i, val);
 493                 else {
 494                         struct snd_interval t;
 495                         t.openmin = 1;
 496                         t.openmax = 1;
 497                         t.empty = 0;
 498                         t.integer = 0;
 499                         if (dir < 0) {
 500                                 t.min = val - 1;
 501                                 t.max = val;
 502                         } else {
 503                                 t.min = val;
 504                                 t.max = val+1;
 505                         }
 506                         changed = snd_interval_refine(i, &t);
 507                 }
 508         } else
 509                 return -EINVAL;
 510         if (changed) {
 511                 params->cmask |= 1 << var;
 512                 params->rmask |= 1 << var;
 513         }
 514         return changed;
 515 }
 516
 517 /**
 518  * snd_pcm_hw_param_set
 519  * @pcm: PCM instance
 520  * @params: the hw_params instance
 521  * @var: parameter to retrieve
 522  * @val: value to set
 523  * @dir: pointer to the direction (-1,0,1) or NULL
 524  *
 525  * Inside configuration space defined by PARAMS remove from PAR all
 526  * values != VAL. Reduce configuration space accordingly.
 527  *  Return VAL or -EINVAL if the configuration space is empty
 528  */
 529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 530                                 struct snd_pcm_hw_params *params,
 531                                 snd_pcm_hw_param_t var, unsigned int val,
 532                                 int dir)
 533 {
 534         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 535         if (changed < 0)
 536                 return changed;
 537         if (params->rmask) {
 538                 int err = snd_pcm_hw_refine(pcm, params);
 539                 if (err < 0)
 540                         return err;
 541         }
 542         return snd_pcm_hw_param_value(params, var, NULL);
 543 }
 544
 545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 546                                         snd_pcm_hw_param_t var)
 547 {
 548         int changed;
 549         changed = snd_interval_setinteger(hw_param_interval(params, var));
 550         if (changed) {
 551                 params->cmask |= 1 << var;
 552                 params->rmask |= 1 << var;
 553         }
 554         return changed;
 555 }
 556
 557 /*
 558  * plugin
 559  */
 560
 561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 563 {
 564         struct snd_pcm_runtime *runtime = substream->runtime;
 565         struct snd_pcm_plugin *plugin, *next;
 566
 567         plugin = runtime->oss.plugin_first;
 568         while (plugin) {
 569                 next = plugin->next;
 570                 snd_pcm_plugin_free(plugin);
 571                 plugin = next;
 572         }
 573         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 574         return 0;
 575 }
 576
 577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 578 {
 579         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 580         plugin->next = runtime->oss.plugin_first;
 581         plugin->prev = NULL;
 582         if (runtime->oss.plugin_first) {
 583                 runtime->oss.plugin_first->prev = plugin;
 584                 runtime->oss.plugin_first = plugin;
 585         } else {
 586                 runtime->oss.plugin_last =
 587                 runtime->oss.plugin_first = plugin;
 588         }
 589         return 0;
 590 }
 591
 592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 593 {
 594         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 595         plugin->next = NULL;
 596         plugin->prev = runtime->oss.plugin_last;
 597         if (runtime->oss.plugin_last) {
 598                 runtime->oss.plugin_last->next = plugin;
 599                 runtime->oss.plugin_last = plugin;
 600         } else {
 601                 runtime->oss.plugin_last =
 602                 runtime->oss.plugin_first = plugin;
 603         }
 604         return 0;
 605 }
 606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 607
 608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 609 {
 610         struct snd_pcm_runtime *runtime = substream->runtime;
 611         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 612         long bytes = frames_to_bytes(runtime, frames);
 613         if (buffer_size == runtime->oss.buffer_bytes)
 614                 return bytes;
 615 #if BITS_PER_LONG >= 64
 616         return runtime->oss.buffer_bytes * bytes / buffer_size;
 617 #else
 618         {
 619                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 620                 u32 rem;
 621                 div64_32(&bsize, buffer_size, &rem);
 622                 return (long)bsize;
 623         }
 624 #endif
 625 }
 626
 627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 628 {
 629         struct snd_pcm_runtime *runtime = substream->runtime;
 630         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 631         if (buffer_size == runtime->oss.buffer_bytes)
 632                 return bytes_to_frames(runtime, bytes);
 633         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 634 }
 635
 636 /* define extended formats in the recent OSS versions (if any) */
 637 /* linear formats */
 638 #define AFMT_S32_LE      0x00001000
 639 #define AFMT_S32_BE      0x00002000
 640 #define AFMT_S24_LE      0x00008000
 641 #define AFMT_S24_BE      0x00010000
 642 #define AFMT_S24_PACKED  0x00040000
 643
 644 /* other supported formats */
 645 #define AFMT_FLOAT       0x00004000
 646 #define AFMT_SPDIF_RAW   0x00020000
 647
 648 /* unsupported formats */
 649 #define AFMT_AC3         0x00000400
 650 #define AFMT_VORBIS      0x00000800
 651
 652 static int snd_pcm_oss_format_from(int format)
 653 {
 654         switch (format) {
 655         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 656         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 657         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 658         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 659         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 660         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 661         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 662         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 663         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 664         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 665         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 666         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 667         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 668         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 669         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 670         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 671         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 672         default:                return SNDRV_PCM_FORMAT_U8;
 673         }
 674 }
 675
 676 static int snd_pcm_oss_format_to(int format)
 677 {
 678         switch (format) {
 679         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 680         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 681         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 682         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 683         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 684         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 685         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 686         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 687         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 688         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 689         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 690         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 691         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 692         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 693         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 694         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 695         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 696         default:                        return -EINVAL;
 697         }
 698 }
 699
 700 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 701                                    struct snd_pcm_hw_params *oss_params,
 702                                    struct snd_pcm_hw_params *slave_params)
 703 {
 704         size_t s;
 705         size_t oss_buffer_size, oss_period_size, oss_periods;
 706         size_t min_period_size, max_period_size;
 707         struct snd_pcm_runtime *runtime = substream->runtime;
 708         size_t oss_frame_size;
 709
 710         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 711                          params_channels(oss_params) / 8;
 712
 713         oss_buffer_size = snd_pcm_plug_client_size(substream,
 714                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 715         oss_buffer_size = 1 << ld2(oss_buffer_size);
 716         if (atomic_read(&substream->mmap_count)) {
 717                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 718                         oss_buffer_size = runtime->oss.mmap_bytes;
 719         }
 720
 721         if (substream->oss.setup.period_size > 16)
 722                 oss_period_size = substream->oss.setup.period_size;
 723         else if (runtime->oss.fragshift) {
 724                 oss_period_size = 1 << runtime->oss.fragshift;
 725                 if (oss_period_size > oss_buffer_size / 2)
 726                         oss_period_size = oss_buffer_size / 2;
 727         } else {
 728                 int sd;
 729                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 730
 731                 oss_period_size = oss_buffer_size;
 732                 do {
 733                         oss_period_size /= 2;
 734                 } while (oss_period_size > bytes_per_sec);
 735                 if (runtime->oss.subdivision == 0) {
 736                         sd = 4;
 737                         if (oss_period_size / sd > 4096)
 738                                 sd *= 2;
 739                         if (oss_period_size / sd < 4096)
 740                                 sd = 1;
 741                 } else
 742                         sd = runtime->oss.subdivision;
 743                 oss_period_size /= sd;
 744                 if (oss_period_size < 16)
 745                         oss_period_size = 16;
 746         }
 747
 748         min_period_size = snd_pcm_plug_client_size(substream,
 749                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 750         min_period_size *= oss_frame_size;
 751         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 752         if (oss_period_size < min_period_size)
 753                 oss_period_size = min_period_size;
 754
 755         max_period_size = snd_pcm_plug_client_size(substream,
 756                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 757         max_period_size *= oss_frame_size;
 758         max_period_size = 1 << ld2(max_period_size);
 759         if (oss_period_size > max_period_size)
 760                 oss_period_size = max_period_size;
 761
 762         oss_periods = oss_buffer_size / oss_period_size;
 763
 764         if (substream->oss.setup.periods > 1)
 765                 oss_periods = substream->oss.setup.periods;
 766
 767         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 768         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 769                 s = runtime->oss.maxfrags;
 770         if (oss_periods > s)
 771                 oss_periods = s;
 772
 773         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 774         if (s < 2)
 775                 s = 2;
 776         if (oss_periods < s)
 777                 oss_periods = s;
 778
 779         while (oss_period_size * oss_periods > oss_buffer_size)
 780                 oss_period_size /= 2;
 781
 782         snd_assert(oss_period_size >= 16, return -EINVAL);
 783         runtime->oss.period_bytes = oss_period_size;
 784         runtime->oss.period_frames = 1;
 785         runtime->oss.periods = oss_periods;
 786         return 0;
 787 }
 788
 789 static int choose_rate(struct snd_pcm_substream *substream,
 790                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 791 {
 792         struct snd_interval *it;
 793         struct snd_pcm_hw_params *save;
 794         unsigned int rate, prev;
 795
 796         save = kmalloc(sizeof(*save), GFP_KERNEL);
 797         if (save == NULL)
 798                 return -ENOMEM;
 799         *save = *params;
 800         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 801
 802         /* try multiples of the best rate */
 803         rate = best_rate;
 804         for (;;) {
 805                 if (it->max < rate || (it->max == rate && it->openmax))
 806                         break;
 807                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 808                         int ret;
 809                         ret = snd_pcm_hw_param_set(substream, params,
 810                                                    SNDRV_PCM_HW_PARAM_RATE,
 811                                                    rate, 0);
 812                         if (ret == (int)rate) {
 813                                 kfree(save);
 814                                 return rate;
 815                         }
 816                         *params = *save;
 817                 }
 818                 prev = rate;
 819                 rate += best_rate;
 820                 if (rate <= prev)
 821                         break;
 822         }
 823
 824         /* not found, use the nearest rate */
 825         kfree(save);
 826         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 827 }
 828
 829 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 830 {
 831         struct snd_pcm_runtime *runtime = substream->runtime;
 832         struct snd_pcm_hw_params *params, *sparams;
 833         struct snd_pcm_sw_params *sw_params;
 834         ssize_t oss_buffer_size, oss_period_size;
 835         size_t oss_frame_size;
 836         int err;
 837         int direct;
 838         int format, sformat, n;
 839         struct snd_mask sformat_mask;
 840         struct snd_mask mask;
 841
 842         if (mutex_lock_interruptible(&runtime->oss.params_lock))
 843                 return -EINTR;
 844         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 845         params = kmalloc(sizeof(*params), GFP_KERNEL);
 846         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 847         if (!sw_params || !params || !sparams) {
 848                 snd_printd("No memory\n");
 849                 err = -ENOMEM;
 850                 goto failure;
 851         }
 852
 853         if (atomic_read(&substream->mmap_count))
 854                 direct = 1;
 855         else
 856                 direct = substream->oss.setup.direct;
 857
 858         _snd_pcm_hw_params_any(sparams);
 859         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 860         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 861         snd_mask_none(&mask);
 862         if (atomic_read(&substream->mmap_count))
 863                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 864         else {
 865                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 866                 if (!direct)
 867                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 868         }
 869         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 870         if (err < 0) {
 871                 snd_printd("No usable accesses\n");
 872                 err = -EINVAL;
 873                 goto failure;
 874         }
 875         choose_rate(substream, sparams, runtime->oss.rate);
 876         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 877
 878         format = snd_pcm_oss_format_from(runtime->oss.format);
 879
 880         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 881         if (direct)
 882                 sformat = format;
 883         else
 884                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 885
 886         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 887                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 888                         if (snd_mask_test(&sformat_mask, sformat) &&
 889                             snd_pcm_oss_format_to(sformat) >= 0)
 890                                 break;
 891                 }
 892                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 893                         snd_printd("Cannot find a format!!!\n");
 894                         err = -EINVAL;
 895                         goto failure;
 896                 }
 897         }
 898         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 899         snd_assert(err >= 0, goto failure);
 900
 901         if (direct) {
 902                 memcpy(params, sparams, sizeof(*params));
 903         } else {
 904                 _snd_pcm_hw_params_any(params);
 905                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 906                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 907                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 908                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 909                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 910                                       runtime->oss.channels, 0);
 911                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 912                                       runtime->oss.rate, 0);
 913                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 914                          params_access(params), params_format(params),
 915                          params_channels(params), params_rate(params));
 916         }
 917         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 918                  params_access(sparams), params_format(sparams),
 919                  params_channels(sparams), params_rate(sparams));
 920
 921         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 922                          params_channels(params) / 8;
 923
 924 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 925         snd_pcm_oss_plugin_clear(substream);
 926         if (!direct) {
 927                 /* add necessary plugins */
 928                 snd_pcm_oss_plugin_clear(substream);
 929                 if ((err = snd_pcm_plug_format_plugins(substream,
 930                                                        params,
 931                                                        sparams)) < 0) {
 932                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 933                         snd_pcm_oss_plugin_clear(substream);
 934                         goto failure;
 935                 }
 936                 if (runtime->oss.plugin_first) {
 937                         struct snd_pcm_plugin *plugin;
 938                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 939                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 940                                 snd_pcm_oss_plugin_clear(substream);
 941                                 goto failure;
 942                         }
 943                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 944                                 err = snd_pcm_plugin_append(plugin);
 945                         } else {
 946                                 err = snd_pcm_plugin_insert(plugin);
 947                         }
 948                         if (err < 0) {
 949                                 snd_pcm_oss_plugin_clear(substream);
 950                                 goto failure;
 951                         }
 952                 }
 953         }
 954 #endif
 955
 956         err = snd_pcm_oss_period_size(substream, params, sparams);
 957         if (err < 0)
 958                 goto failure;
 959
 960         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 961         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 962         snd_assert(err >= 0, goto failure);
 963
 964         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 965                                      runtime->oss.periods, NULL);
 966         snd_assert(err >= 0, goto failure);
 967
 968         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 969
 970         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 971                 snd_printd("HW_PARAMS failed: %i\n", err);
 972                 goto failure;
 973         }
 974
 975         memset(sw_params, 0, sizeof(*sw_params));
 976         if (runtime->oss.trigger) {
 977                 sw_params->start_threshold = 1;
 978         } else {
 979                 sw_params->start_threshold = runtime->boundary;
 980         }
 981         if (atomic_read(&substream->mmap_count) ||
 982             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 983                 sw_params->stop_threshold = runtime->boundary;
 984         else
 985                 sw_params->stop_threshold = runtime->buffer_size;
 986         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 987         sw_params->period_step = 1;
 988         sw_params->sleep_min = 0;
 989         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 990                 1 : runtime->period_size;
 991         sw_params->xfer_align = 1;
 992         if (atomic_read(&substream->mmap_count) ||
 993             substream->oss.setup.nosilence) {
 994                 sw_params->silence_threshold = 0;
 995                 sw_params->silence_size = 0;
 996         } else {
 997                 snd_pcm_uframes_t frames;
 998                 frames = runtime->period_size + 16;
 999                 if (frames > runtime->buffer_size)
1000                         frames = runtime->buffer_size;
1001                 sw_params->silence_threshold = frames;
1002                 sw_params->silence_size = frames;
1003         }
1004
1005         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1006                 snd_printd("SW_PARAMS failed: %i\n", err);
1007                 goto failure;
1008         }
1009
1010         runtime->oss.periods = params_periods(sparams);
1011         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1012         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
1013 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1014         if (runtime->oss.plugin_first) {
1015                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1016                 if (err < 0)
1017                         goto failure;
1018         }
1019 #endif
1020         oss_period_size *= oss_frame_size;
1021
1022         oss_buffer_size = oss_period_size * runtime->oss.periods;
1023         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
1024
1025         runtime->oss.period_bytes = oss_period_size;
1026         runtime->oss.buffer_bytes = oss_buffer_size;
1027
1028         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1029                  runtime->oss.period_bytes,
1030                  runtime->oss.buffer_bytes);
1031         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1032                  params_period_size(sparams),
1033                  params_buffer_size(sparams));
1034
1035         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1036         runtime->oss.channels = params_channels(params);
1037         runtime->oss.rate = params_rate(params);
1038
1039         runtime->oss.params = 0;
1040         runtime->oss.prepare = 1;
1041         vfree(runtime->oss.buffer);
1042         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1043         runtime->oss.buffer_used = 0;
1044         if (runtime->dma_area)
1045                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1046
1047         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1048
1049         err = 0;
1050 failure:
1051         kfree(sw_params);
1052         kfree(params);
1053         kfree(sparams);
1054         mutex_unlock(&runtime->oss.params_lock);
1055         return err;
1056 }
1057
1058 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1059 {
1060         int idx, err;
1061         struct snd_pcm_substream *asubstream = NULL, *substream;
1062
1063         for (idx = 0; idx < 2; idx++) {
1064                 substream = pcm_oss_file->streams[idx];
1065                 if (substream == NULL)
1066                         continue;
1067                 if (asubstream == NULL)
1068                         asubstream = substream;
1069                 if (substream->runtime->oss.params) {
1070                         err = snd_pcm_oss_change_params(substream);
1071                         if (err < 0)
1072                                 return err;
1073                 }
1074         }
1075         snd_assert(asubstream != NULL, return -EIO);
1076         if (r_substream)
1077                 *r_substream = asubstream;
1078         return 0;
1079 }
1080
1081 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1082 {
1083         int err;
1084         struct snd_pcm_runtime *runtime = substream->runtime;
1085
1086         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1087         if (err < 0) {
1088                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1089                 return err;
1090         }
1091         runtime->oss.prepare = 0;
1092         runtime->oss.prev_hw_ptr_interrupt = 0;
1093         runtime->oss.period_ptr = 0;
1094         runtime->oss.buffer_used = 0;
1095
1096         return 0;
1097 }
1098
1099 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1100 {
1101         struct snd_pcm_runtime *runtime;
1102         int err;
1103
1104         if (substream == NULL)
1105                 return 0;
1106         runtime = substream->runtime;
1107         if (runtime->oss.params) {
1108                 err = snd_pcm_oss_change_params(substream);
1109                 if (err < 0)
1110                         return err;
1111         }
1112         if (runtime->oss.prepare) {
1113                 err = snd_pcm_oss_prepare(substream);
1114                 if (err < 0)
1115                         return err;
1116         }
1117         return 0;
1118 }
1119
1120 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1121 {
1122         struct snd_pcm_runtime *runtime;
1123         snd_pcm_uframes_t frames;
1124         int err = 0;
1125
1126         while (1) {
1127                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1128                 if (err < 0)
1129                         break;
1130                 runtime = substream->runtime;
1131                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1132                         break;
1133                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1134                 /* until avail(delay) <= buffer_size */
1135                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1136                 frames /= runtime->period_size;
1137                 frames *= runtime->period_size;
1138                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1139                 if (err < 0)
1140                         break;
1141         }
1142         return err;
1143 }
1144
1145 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1146 {
1147         struct snd_pcm_runtime *runtime = substream->runtime;
1148         int ret;
1149         while (1) {
1150                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1151                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1152 #ifdef OSS_DEBUG
1153                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1154                                 printk("pcm_oss: write: recovering from XRUN\n");
1155                         else
1156                                 printk("pcm_oss: write: recovering from SUSPEND\n");
1157 #endif
1158                         ret = snd_pcm_oss_prepare(substream);
1159                         if (ret < 0)
1160                                 break;
1161                 }
1162                 if (in_kernel) {
1163                         mm_segment_t fs;
1164                         fs = snd_enter_user();
1165                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1166                         snd_leave_user(fs);
1167                 } else {
1168                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1169                 }
1170                 if (ret != -EPIPE && ret != -ESTRPIPE)
1171                         break;
1172                 /* test, if we can't store new data, because the stream */
1173                 /* has not been started */
1174                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1175                         return -EAGAIN;
1176         }
1177         return ret;
1178 }
1179
1180 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1181 {
1182         struct snd_pcm_runtime *runtime = substream->runtime;
1183         snd_pcm_sframes_t delay;
1184         int ret;
1185         while (1) {
1186                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1187                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1188 #ifdef OSS_DEBUG
1189                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1190                                 printk("pcm_oss: read: recovering from XRUN\n");
1191                         else
1192                                 printk("pcm_oss: read: recovering from SUSPEND\n");
1193 #endif
1194                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1195                         if (ret < 0)
1196                                 break;
1197                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1198                         ret = snd_pcm_oss_prepare(substream);
1199                         if (ret < 0)
1200                                 break;
1201                 }
1202                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1203                 if (ret < 0)
1204                         break;
1205                 if (in_kernel) {
1206                         mm_segment_t fs;
1207                         fs = snd_enter_user();
1208                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1209                         snd_leave_user(fs);
1210                 } else {
1211                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1212                 }
1213                 if (ret == -EPIPE) {
1214                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1215                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1216                                 if (ret < 0)
1217                                         break;
1218                         }
1219                         continue;
1220                 }
1221                 if (ret != -ESTRPIPE)
1222                         break;
1223         }
1224         return ret;
1225 }
1226
1227 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1228 {
1229         struct snd_pcm_runtime *runtime = substream->runtime;
1230         int ret;
1231         while (1) {
1232                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1233                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1234 #ifdef OSS_DEBUG
1235                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1236                                 printk("pcm_oss: writev: recovering from XRUN\n");
1237                         else
1238                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
1239 #endif
1240                         ret = snd_pcm_oss_prepare(substream);
1241                         if (ret < 0)
1242                                 break;
1243                 }
1244                 if (in_kernel) {
1245                         mm_segment_t fs;
1246                         fs = snd_enter_user();
1247                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1248                         snd_leave_user(fs);
1249                 } else {
1250                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1251                 }
1252                 if (ret != -EPIPE && ret != -ESTRPIPE)
1253                         break;
1254
1255                 /* test, if we can't store new data, because the stream */
1256                 /* has not been started */
1257                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1258                         return -EAGAIN;
1259         }
1260         return ret;
1261 }
1262
1263 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1264 {
1265         struct snd_pcm_runtime *runtime = substream->runtime;
1266         int ret;
1267         while (1) {
1268                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1269                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1270 #ifdef OSS_DEBUG
1271                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1272                                 printk("pcm_oss: readv: recovering from XRUN\n");
1273                         else
1274                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
1275 #endif
1276                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1277                         if (ret < 0)
1278                                 break;
1279                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1280                         ret = snd_pcm_oss_prepare(substream);
1281                         if (ret < 0)
1282                                 break;
1283                 }
1284                 if (in_kernel) {
1285                         mm_segment_t fs;
1286                         fs = snd_enter_user();
1287                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1288                         snd_leave_user(fs);
1289                 } else {
1290                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1291                 }
1292                 if (ret != -EPIPE && ret != -ESTRPIPE)
1293                         break;
1294         }
1295         return ret;
1296 }
1297
1298 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1299 {
1300         struct snd_pcm_runtime *runtime = substream->runtime;
1301         snd_pcm_sframes_t frames, frames1;
1302 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1303         if (runtime->oss.plugin_first) {
1304                 struct snd_pcm_plugin_channel *channels;
1305                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1306                 if (!in_kernel) {
1307                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1308                                 return -EFAULT;
1309                         buf = runtime->oss.buffer;
1310                 }
1311                 frames = bytes / oss_frame_bytes;
1312                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1313                 if (frames1 < 0)
1314                         return frames1;
1315                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1316                 if (frames1 <= 0)
1317                         return frames1;
1318                 bytes = frames1 * oss_frame_bytes;
1319         } else
1320 #endif
1321         {
1322                 frames = bytes_to_frames(runtime, bytes);
1323                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1324                 if (frames1 <= 0)
1325                         return frames1;
1326                 bytes = frames_to_bytes(runtime, frames1);
1327         }
1328         return bytes;
1329 }
1330
1331 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1332 {
1333         size_t xfer = 0;
1334         ssize_t tmp;
1335         struct snd_pcm_runtime *runtime = substream->runtime;
1336
1337         if (atomic_read(&substream->mmap_count))
1338                 return -ENXIO;
1339
1340         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1341                 return tmp;
1342         mutex_lock(&runtime->oss.params_lock);
1343         while (bytes > 0) {
1344                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1345                         tmp = bytes;
1346                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1347                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1348                         if (tmp > 0) {
1349                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1350                                         tmp = -EFAULT;
1351                                         goto err;
1352                                 }
1353                         }
1354                         runtime->oss.buffer_used += tmp;
1355                         buf += tmp;
1356                         bytes -= tmp;
1357                         xfer += tmp;
1358                         if (substream->oss.setup.partialfrag ||
1359                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1360                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1361                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1362                                 if (tmp <= 0)
1363                                         goto err;
1364                                 runtime->oss.bytes += tmp;
1365                                 runtime->oss.period_ptr += tmp;
1366                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1367                                 if (runtime->oss.period_ptr == 0 ||
1368                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1369                                         runtime->oss.buffer_used = 0;
1370                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1371                                         tmp = -EAGAIN;
1372                                         goto err;
1373                                 }
1374                         }
1375                 } else {
1376                         tmp = snd_pcm_oss_write2(substream,
1377                                                  (const char __force *)buf,
1378                                                  runtime->oss.period_bytes, 0);
1379                         if (tmp <= 0)
1380                                 goto err;
1381                         runtime->oss.bytes += tmp;
1382                         buf += tmp;
1383                         bytes -= tmp;
1384                         xfer += tmp;
1385                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1386                             tmp != runtime->oss.period_bytes)
1387                                 break;
1388                 }
1389         }
1390         mutex_unlock(&runtime->oss.params_lock);
1391         return xfer;
1392
1393  err:
1394         mutex_unlock(&runtime->oss.params_lock);
1395         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1396 }
1397
1398 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1399 {
1400         struct snd_pcm_runtime *runtime = substream->runtime;
1401         snd_pcm_sframes_t frames, frames1;
1402 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1403         char __user *final_dst = (char __user *)buf;
1404         if (runtime->oss.plugin_first) {
1405                 struct snd_pcm_plugin_channel *channels;
1406                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1407                 if (!in_kernel)
1408                         buf = runtime->oss.buffer;
1409                 frames = bytes / oss_frame_bytes;
1410                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1411                 if (frames1 < 0)
1412                         return frames1;
1413                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1414                 if (frames1 <= 0)
1415                         return frames1;
1416                 bytes = frames1 * oss_frame_bytes;
1417                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1418                         return -EFAULT;
1419         } else
1420 #endif
1421         {
1422                 frames = bytes_to_frames(runtime, bytes);
1423                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1424                 if (frames1 <= 0)
1425                         return frames1;
1426                 bytes = frames_to_bytes(runtime, frames1);
1427         }
1428         return bytes;
1429 }
1430
1431 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1432 {
1433         size_t xfer = 0;
1434         ssize_t tmp;
1435         struct snd_pcm_runtime *runtime = substream->runtime;
1436
1437         if (atomic_read(&substream->mmap_count))
1438                 return -ENXIO;
1439
1440         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1441                 return tmp;
1442         mutex_lock(&runtime->oss.params_lock);
1443         while (bytes > 0) {
1444                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1445                         if (runtime->oss.buffer_used == 0) {
1446                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1447                                 if (tmp <= 0)
1448                                         goto err;
1449                                 runtime->oss.bytes += tmp;
1450                                 runtime->oss.period_ptr = tmp;
1451                                 runtime->oss.buffer_used = tmp;
1452                         }
1453                         tmp = bytes;
1454                         if ((size_t) tmp > runtime->oss.buffer_used)
1455                                 tmp = runtime->oss.buffer_used;
1456                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1457                                 tmp = -EFAULT;
1458                                 goto err;
1459                         }
1460                         buf += tmp;
1461                         bytes -= tmp;
1462                         xfer += tmp;
1463                         runtime->oss.buffer_used -= tmp;
1464                 } else {
1465                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1466                                                 runtime->oss.period_bytes, 0);
1467                         if (tmp <= 0)
1468                                 goto err;
1469                         runtime->oss.bytes += tmp;
1470                         buf += tmp;
1471                         bytes -= tmp;
1472                         xfer += tmp;
1473                 }
1474         }
1475         mutex_unlock(&runtime->oss.params_lock);
1476         return xfer;
1477
1478  err:
1479         mutex_unlock(&runtime->oss.params_lock);
1480         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1481 }
1482
1483 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1484 {
1485         struct snd_pcm_substream *substream;
1486
1487         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1488         if (substream != NULL) {
1489                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1490                 substream->runtime->oss.prepare = 1;
1491         }
1492         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1493         if (substream != NULL) {
1494                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1495                 substream->runtime->oss.prepare = 1;
1496         }
1497         return 0;
1498 }
1499
1500 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1501 {
1502         struct snd_pcm_substream *substream;
1503         int err;
1504
1505         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1506         if (substream != NULL) {
1507                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1508                         return err;
1509                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1510         }
1511         /* note: all errors from the start action are ignored */
1512         /* OSS apps do not know, how to handle them */
1513         return 0;
1514 }
1515
1516 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1517 {
1518         struct snd_pcm_runtime *runtime;
1519         ssize_t result = 0;
1520         long res;
1521         wait_queue_t wait;
1522
1523         runtime = substream->runtime;
1524         init_waitqueue_entry(&wait, current);
1525         add_wait_queue(&runtime->sleep, &wait);
1526 #ifdef OSS_DEBUG
1527         printk("sync1: size = %li\n", size);
1528 #endif
1529         while (1) {
1530                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1531                 if (result > 0) {
1532                         runtime->oss.buffer_used = 0;
1533                         result = 0;
1534                         break;
1535                 }
1536                 if (result != 0 && result != -EAGAIN)
1537                         break;
1538                 result = 0;
1539                 set_current_state(TASK_INTERRUPTIBLE);
1540                 snd_pcm_stream_lock_irq(substream);
1541                 res = runtime->status->state;
1542                 snd_pcm_stream_unlock_irq(substream);
1543                 if (res != SNDRV_PCM_STATE_RUNNING) {
1544                         set_current_state(TASK_RUNNING);
1545                         break;
1546                 }
1547                 res = schedule_timeout(10 * HZ);
1548                 if (signal_pending(current)) {
1549                         result = -ERESTARTSYS;
1550                         break;
1551                 }
1552                 if (res == 0) {
1553                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1554                         result = -EIO;
1555                         break;
1556                 }
1557         }
1558         remove_wait_queue(&runtime->sleep, &wait);
1559         return result;
1560 }
1561
1562 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1563 {
1564         int err = 0;
1565         unsigned int saved_f_flags;
1566         struct snd_pcm_substream *substream;
1567         struct snd_pcm_runtime *runtime;
1568         snd_pcm_format_t format;
1569         unsigned long width;
1570         size_t size;
1571
1572         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1573         if (substream != NULL) {
1574                 runtime = substream->runtime;
1575                 if (atomic_read(&substream->mmap_count))
1576                         goto __direct;
1577                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1578                         return err;
1579                 format = snd_pcm_oss_format_from(runtime->oss.format);
1580                 width = snd_pcm_format_physical_width(format);
1581                 mutex_lock(&runtime->oss.params_lock);
1582                 if (runtime->oss.buffer_used > 0) {
1583 #ifdef OSS_DEBUG
1584                         printk("sync: buffer_used\n");
1585 #endif
1586                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1587                         snd_pcm_format_set_silence(format,
1588                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1589                                                    size);
1590                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1591                         if (err < 0) {
1592                                 mutex_unlock(&runtime->oss.params_lock);
1593                                 return err;
1594                         }
1595                 } else if (runtime->oss.period_ptr > 0) {
1596 #ifdef OSS_DEBUG
1597                         printk("sync: period_ptr\n");
1598 #endif
1599                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1600                         snd_pcm_format_set_silence(format,
1601                                                    runtime->oss.buffer,
1602                                                    size * 8 / width);
1603                         err = snd_pcm_oss_sync1(substream, size);
1604                         if (err < 0) {
1605                                 mutex_unlock(&runtime->oss.params_lock);
1606                                 return err;
1607                         }
1608                 }
1609                 /*
1610                  * The ALSA's period might be a bit large than OSS one.
1611                  * Fill the remain portion of ALSA period with zeros.
1612                  */
1613                 size = runtime->control->appl_ptr % runtime->period_size;
1614                 if (size > 0) {
1615                         size = runtime->period_size - size;
1616                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1617                                 size = (runtime->frame_bits * size) / 8;
1618                                 while (size > 0) {
1619                                         mm_segment_t fs;
1620                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1621                                         size -= size1;
1622                                         size1 *= 8;
1623                                         size1 /= runtime->sample_bits;
1624                                         snd_pcm_format_set_silence(runtime->format,
1625                                                                    runtime->oss.buffer,
1626                                                                    size1);
1627                                         fs = snd_enter_user();
1628                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1629                                         snd_leave_user(fs);
1630                                 }
1631                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1632                                 void __user *buffers[runtime->channels];
1633                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1634                                 snd_pcm_lib_writev(substream, buffers, size);
1635                         }
1636                 }
1637                 mutex_unlock(&runtime->oss.params_lock);
1638                 /*
1639                  * finish sync: drain the buffer
1640                  */
1641               __direct:
1642                 saved_f_flags = substream->f_flags;
1643                 substream->f_flags &= ~O_NONBLOCK;
1644                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1645                 substream->f_flags = saved_f_flags;
1646                 if (err < 0)
1647                         return err;
1648                 runtime->oss.prepare = 1;
1649         }
1650
1651         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1652         if (substream != NULL) {
1653                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1654                         return err;
1655                 runtime = substream->runtime;
1656                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1657                 if (err < 0)
1658                         return err;
1659                 runtime->oss.buffer_used = 0;
1660                 runtime->oss.prepare = 1;
1661         }
1662         return 0;
1663 }
1664
1665 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1666 {
1667         int idx;
1668
1669         for (idx = 1; idx >= 0; --idx) {
1670                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1671                 struct snd_pcm_runtime *runtime;
1672                 if (substream == NULL)
1673                         continue;
1674                 runtime = substream->runtime;
1675                 if (rate < 1000)
1676                         rate = 1000;
1677                 else if (rate > 192000)
1678                         rate = 192000;
1679                 if (runtime->oss.rate != rate) {
1680                         runtime->oss.params = 1;
1681                         runtime->oss.rate = rate;
1682                 }
1683         }
1684         return snd_pcm_oss_get_rate(pcm_oss_file);
1685 }
1686
1687 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1688 {
1689         struct snd_pcm_substream *substream;
1690         int err;
1691
1692         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1693                 return err;
1694         return substream->runtime->oss.rate;
1695 }
1696
1697 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1698 {
1699         int idx;
1700         if (channels < 1)
1701                 channels = 1;
1702         if (channels > 128)
1703                 return -EINVAL;
1704         for (idx = 1; idx >= 0; --idx) {
1705                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1706                 struct snd_pcm_runtime *runtime;
1707                 if (substream == NULL)
1708                         continue;
1709                 runtime = substream->runtime;
1710                 if (runtime->oss.channels != channels) {
1711                         runtime->oss.params = 1;
1712                         runtime->oss.channels = channels;
1713                 }
1714         }
1715         return snd_pcm_oss_get_channels(pcm_oss_file);
1716 }
1717
1718 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1719 {
1720         struct snd_pcm_substream *substream;
1721         int err;
1722
1723         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1724                 return err;
1725         return substream->runtime->oss.channels;
1726 }
1727
1728 static int snd_pcm_oss_get_block_size(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.period_bytes;
1736 }
1737
1738 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1739 {
1740         struct snd_pcm_substream *substream;
1741         int err;
1742         int direct;
1743         struct snd_pcm_hw_params *params;
1744         unsigned int formats = 0;
1745         struct snd_mask format_mask;
1746         int fmt;
1747
1748         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1749                 return err;
1750         if (atomic_read(&substream->mmap_count))
1751                 direct = 1;
1752         else
1753                 direct = substream->oss.setup.direct;
1754         if (!direct)
1755                 return AFMT_MU_LAW | AFMT_U8 |
1756                        AFMT_S16_LE | AFMT_S16_BE |
1757                        AFMT_S8 | AFMT_U16_LE |
1758                        AFMT_U16_BE |
1759                         AFMT_S32_LE | AFMT_S32_BE |
1760                         AFMT_S24_LE | AFMT_S24_LE |
1761                         AFMT_S24_PACKED;
1762         params = kmalloc(sizeof(*params), GFP_KERNEL);
1763         if (!params)
1764                 return -ENOMEM;
1765         _snd_pcm_hw_params_any(params);
1766         err = snd_pcm_hw_refine(substream, params);
1767         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1768         kfree(params);
1769         snd_assert(err >= 0, return err);
1770         for (fmt = 0; fmt < 32; ++fmt) {
1771                 if (snd_mask_test(&format_mask, fmt)) {
1772                         int f = snd_pcm_oss_format_to(fmt);
1773                         if (f >= 0)
1774                                 formats |= f;
1775                 }
1776         }
1777         return formats;
1778 }
1779
1780 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1781 {
1782         int formats, idx;
1783
1784         if (format != AFMT_QUERY) {
1785                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1786                 if (formats < 0)
1787                         return formats;
1788                 if (!(formats & format))
1789                         format = AFMT_U8;
1790                 for (idx = 1; idx >= 0; --idx) {
1791                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1792                         struct snd_pcm_runtime *runtime;
1793                         if (substream == NULL)
1794                                 continue;
1795                         runtime = substream->runtime;
1796                         if (runtime->oss.format != format) {
1797                                 runtime->oss.params = 1;
1798                                 runtime->oss.format = format;
1799                         }
1800                 }
1801         }
1802         return snd_pcm_oss_get_format(pcm_oss_file);
1803 }
1804
1805 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1806 {
1807         struct snd_pcm_substream *substream;
1808         int err;
1809
1810         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1811                 return err;
1812         return substream->runtime->oss.format;
1813 }
1814
1815 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1816 {
1817         struct snd_pcm_runtime *runtime;
1818
1819         if (substream == NULL)
1820                 return 0;
1821         runtime = substream->runtime;
1822         if (subdivide == 0) {
1823                 subdivide = runtime->oss.subdivision;
1824                 if (subdivide == 0)
1825                         subdivide = 1;
1826                 return subdivide;
1827         }
1828         if (runtime->oss.subdivision || runtime->oss.fragshift)
1829                 return -EINVAL;
1830         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1831             subdivide != 8 && subdivide != 16)
1832                 return -EINVAL;
1833         runtime->oss.subdivision = subdivide;
1834         runtime->oss.params = 1;
1835         return subdivide;
1836 }
1837
1838 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1839 {
1840         int err = -EINVAL, idx;
1841
1842         for (idx = 1; idx >= 0; --idx) {
1843                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1844                 if (substream == NULL)
1845                         continue;
1846                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1847                         return err;
1848         }
1849         return err;
1850 }
1851
1852 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1853 {
1854         struct snd_pcm_runtime *runtime;
1855
1856         if (substream == NULL)
1857                 return 0;
1858         runtime = substream->runtime;
1859         if (runtime->oss.subdivision || runtime->oss.fragshift)
1860                 return -EINVAL;
1861         runtime->oss.fragshift = val & 0xffff;
1862         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1863         if (runtime->oss.fragshift < 4)         /* < 16 */
1864                 runtime->oss.fragshift = 4;
1865         if (runtime->oss.maxfrags < 2)
1866                 runtime->oss.maxfrags = 2;
1867         runtime->oss.params = 1;
1868         return 0;
1869 }
1870
1871 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1872 {
1873         int err = -EINVAL, idx;
1874
1875         for (idx = 1; idx >= 0; --idx) {
1876                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1877                 if (substream == NULL)
1878                         continue;
1879                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1880                         return err;
1881         }
1882         return err;
1883 }
1884
1885 static int snd_pcm_oss_nonblock(struct file * file)
1886 {
1887         file->f_flags |= O_NONBLOCK;
1888         return 0;
1889 }
1890
1891 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1892 {
1893
1894         if (substream == NULL) {
1895                 res &= ~DSP_CAP_DUPLEX;
1896                 return res;
1897         }
1898 #ifdef DSP_CAP_MULTI
1899         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1900                 if (substream->pstr->substream_count > 1)
1901                         res |= DSP_CAP_MULTI;
1902 #endif
1903         /* DSP_CAP_REALTIME is set all times: */
1904         /* all ALSA drivers can return actual pointer in ring buffer */
1905 #if defined(DSP_CAP_REALTIME) && 0
1906         {
1907                 struct snd_pcm_runtime *runtime = substream->runtime;
1908                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1909                         res &= ~DSP_CAP_REALTIME;
1910         }
1911 #endif
1912         return res;
1913 }
1914
1915 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1916 {
1917         int result, idx;
1918
1919         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1920         for (idx = 0; idx < 2; idx++) {
1921                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1922                 result = snd_pcm_oss_get_caps1(substream, result);
1923         }
1924         result |= 0x0001;       /* revision - same as SB AWE 64 */
1925         return result;
1926 }
1927
1928 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1929 {
1930         struct snd_pcm_runtime *runtime = substream->runtime;
1931         snd_pcm_uframes_t appl_ptr;
1932         appl_ptr = hw_ptr + runtime->buffer_size;
1933         appl_ptr %= runtime->boundary;
1934         runtime->control->appl_ptr = appl_ptr;
1935 }
1936
1937 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1938 {
1939         struct snd_pcm_runtime *runtime;
1940         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1941         int err, cmd;
1942
1943 #ifdef OSS_DEBUG
1944         printk("pcm_oss: trigger = 0x%x\n", trigger);
1945 #endif
1946
1947         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1948         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1949
1950         if (psubstream) {
1951                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1952                         return err;
1953         }
1954         if (csubstream) {
1955                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1956                         return err;
1957         }
1958         if (psubstream) {
1959                 runtime = psubstream->runtime;
1960                 if (trigger & PCM_ENABLE_OUTPUT) {
1961                         if (runtime->oss.trigger)
1962                                 goto _skip1;
1963                         if (atomic_read(&psubstream->mmap_count))
1964                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1965                         runtime->oss.trigger = 1;
1966                         runtime->start_threshold = 1;
1967                         cmd = SNDRV_PCM_IOCTL_START;
1968                 } else {
1969                         if (!runtime->oss.trigger)
1970                                 goto _skip1;
1971                         runtime->oss.trigger = 0;
1972                         runtime->start_threshold = runtime->boundary;
1973                         cmd = SNDRV_PCM_IOCTL_DROP;
1974                         runtime->oss.prepare = 1;
1975                 }
1976                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1977                 if (err < 0)
1978                         return err;
1979         }
1980  _skip1:
1981         if (csubstream) {
1982                 runtime = csubstream->runtime;
1983                 if (trigger & PCM_ENABLE_INPUT) {
1984                         if (runtime->oss.trigger)
1985                                 goto _skip2;
1986                         runtime->oss.trigger = 1;
1987                         runtime->start_threshold = 1;
1988                         cmd = SNDRV_PCM_IOCTL_START;
1989                 } else {
1990                         if (!runtime->oss.trigger)
1991                                 goto _skip2;
1992                         runtime->oss.trigger = 0;
1993                         runtime->start_threshold = runtime->boundary;
1994                         cmd = SNDRV_PCM_IOCTL_DROP;
1995                         runtime->oss.prepare = 1;
1996                 }
1997                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1998                 if (err < 0)
1999                         return err;
2000         }
2001  _skip2:
2002         return 0;
2003 }
2004
2005 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2006 {
2007         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2008         int result = 0;
2009
2010         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2011         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2012         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2013                 result |= PCM_ENABLE_OUTPUT;
2014         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2015                 result |= PCM_ENABLE_INPUT;
2016         return result;
2017 }
2018
2019 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2020 {
2021         struct snd_pcm_substream *substream;
2022         struct snd_pcm_runtime *runtime;
2023         snd_pcm_sframes_t delay;
2024         int err;
2025
2026         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2027         if (substream == NULL)
2028                 return -EINVAL;
2029         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2030                 return err;
2031         runtime = substream->runtime;
2032         if (runtime->oss.params || runtime->oss.prepare)
2033                 return 0;
2034         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2035         if (err == -EPIPE)
2036                 delay = 0;      /* hack for broken OSS applications */
2037         else if (err < 0)
2038                 return err;
2039         return snd_pcm_oss_bytes(substream, delay);
2040 }
2041
2042 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2043 {
2044         struct snd_pcm_substream *substream;
2045         struct snd_pcm_runtime *runtime;
2046         snd_pcm_sframes_t delay;
2047         int fixup;
2048         struct count_info info;
2049         int err;
2050
2051         if (_info == NULL)
2052                 return -EFAULT;
2053         substream = pcm_oss_file->streams[stream];
2054         if (substream == NULL)
2055                 return -EINVAL;
2056         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2057                 return err;
2058         runtime = substream->runtime;
2059         if (runtime->oss.params || runtime->oss.prepare) {
2060                 memset(&info, 0, sizeof(info));
2061                 if (copy_to_user(_info, &info, sizeof(info)))
2062                         return -EFAULT;
2063                 return 0;
2064         }
2065         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2066                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2067                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2068                         err = 0;
2069                         delay = 0;
2070                         fixup = 0;
2071                 } else {
2072                         fixup = runtime->oss.buffer_used;
2073                 }
2074         } else {
2075                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2076                 fixup = -runtime->oss.buffer_used;
2077         }
2078         if (err < 0)
2079                 return err;
2080         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2081         if (atomic_read(&substream->mmap_count)) {
2082                 snd_pcm_sframes_t n;
2083                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2084                 if (n < 0)
2085                         n += runtime->boundary;
2086                 info.blocks = n / runtime->period_size;
2087                 runtime->oss.prev_hw_ptr_interrupt = delay;
2088                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2089                         snd_pcm_oss_simulate_fill(substream, delay);
2090                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2091         } else {
2092                 delay = snd_pcm_oss_bytes(substream, delay);
2093                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2094                         if (substream->oss.setup.buggyptr)
2095                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2096                         else
2097                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2098                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2099                 } else {
2100                         delay += fixup;
2101                         info.blocks = delay / runtime->oss.period_bytes;
2102                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2103                 }
2104         }
2105         if (copy_to_user(_info, &info, sizeof(info)))
2106                 return -EFAULT;
2107         return 0;
2108 }
2109
2110 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2111 {
2112         struct snd_pcm_substream *substream;
2113         struct snd_pcm_runtime *runtime;
2114         snd_pcm_sframes_t avail;
2115         int fixup;
2116         struct audio_buf_info info;
2117         int err;
2118
2119         if (_info == NULL)
2120                 return -EFAULT;
2121         substream = pcm_oss_file->streams[stream];
2122         if (substream == NULL)
2123                 return -EINVAL;
2124         runtime = substream->runtime;
2125
2126         if (runtime->oss.params &&
2127             (err = snd_pcm_oss_change_params(substream)) < 0)
2128                 return err;
2129
2130         info.fragsize = runtime->oss.period_bytes;
2131         info.fragstotal = runtime->periods;
2132         if (runtime->oss.prepare) {
2133                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2134                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2135                         info.fragments = runtime->oss.periods;
2136                 } else {
2137                         info.bytes = 0;
2138                         info.fragments = 0;
2139                 }
2140         } else {
2141                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2142                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2143                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2144                                 avail = runtime->buffer_size;
2145                                 err = 0;
2146                                 fixup = 0;
2147                         } else {
2148                                 avail = runtime->buffer_size - avail;
2149                                 fixup = -runtime->oss.buffer_used;
2150                         }
2151                 } else {
2152                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2153                         fixup = runtime->oss.buffer_used;
2154                 }
2155                 if (err < 0)
2156                         return err;
2157                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2158                 info.fragments = info.bytes / runtime->oss.period_bytes;
2159         }
2160
2161 #ifdef OSS_DEBUG
2162         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2163 #endif
2164         if (copy_to_user(_info, &info, sizeof(info)))
2165                 return -EFAULT;
2166         return 0;
2167 }
2168
2169 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2170 {
2171         // it won't be probably implemented
2172         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2173         return -EINVAL;
2174 }
2175
2176 static const char *strip_task_path(const char *path)
2177 {
2178         const char *ptr, *ptrl = NULL;
2179         for (ptr = path; *ptr; ptr++) {
2180                 if (*ptr == '/')
2181                         ptrl = ptr + 1;
2182         }
2183         return ptrl;
2184 }
2185
2186 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2187                                       const char *task_name,
2188                                       struct snd_pcm_oss_setup *rsetup)
2189 {
2190         struct snd_pcm_oss_setup *setup;
2191
2192         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2193         do {
2194                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2195                      setup = setup->next) {
2196                         if (!strcmp(setup->task_name, task_name))
2197                                 goto out;
2198                 }
2199         } while ((task_name = strip_task_path(task_name)) != NULL);
2200  out:
2201         if (setup)
2202                 *rsetup = *setup;
2203         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2204 }
2205
2206 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2207 {
2208         struct snd_pcm_runtime *runtime;
2209         runtime = substream->runtime;
2210         vfree(runtime->oss.buffer);
2211         runtime->oss.buffer = NULL;
2212 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2213         snd_pcm_oss_plugin_clear(substream);
2214 #endif
2215         substream->oss.oss = 0;
2216 }
2217
2218 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2219                                        struct snd_pcm_oss_setup *setup,
2220                                        int minor)
2221 {
2222         struct snd_pcm_runtime *runtime;
2223
2224         substream->oss.oss = 1;
2225         substream->oss.setup = *setup;
2226         if (setup->nonblock)
2227                 substream->f_flags |= O_NONBLOCK;
2228         else if (setup->block)
2229                 substream->f_flags &= ~O_NONBLOCK;
2230         runtime = substream->runtime;
2231         runtime->oss.params = 1;
2232         runtime->oss.trigger = 1;
2233         runtime->oss.rate = 8000;
2234         mutex_init(&runtime->oss.params_lock);
2235         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2236         case SNDRV_MINOR_OSS_PCM_8:
2237                 runtime->oss.format = AFMT_U8;
2238                 break;
2239         case SNDRV_MINOR_OSS_PCM_16:
2240                 runtime->oss.format = AFMT_S16_LE;
2241                 break;
2242         default:
2243                 runtime->oss.format = AFMT_MU_LAW;
2244         }
2245         runtime->oss.channels = 1;
2246         runtime->oss.fragshift = 0;
2247         runtime->oss.maxfrags = 0;
2248         runtime->oss.subdivision = 0;
2249         substream->pcm_release = snd_pcm_oss_release_substream;
2250 }
2251
2252 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2253 {
2254         int cidx;
2255         snd_assert(pcm_oss_file != NULL, return -ENXIO);
2256         for (cidx = 0; cidx < 2; ++cidx) {
2257                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2258                 if (substream)
2259                         snd_pcm_release_substream(substream);
2260         }
2261         kfree(pcm_oss_file);
2262         return 0;
2263 }
2264
2265 static int snd_pcm_oss_open_file(struct file *file,
2266                                  struct snd_pcm *pcm,
2267                                  struct snd_pcm_oss_file **rpcm_oss_file,
2268                                  int minor,
2269                                  struct snd_pcm_oss_setup *setup)
2270 {
2271         int idx, err;
2272         struct snd_pcm_oss_file *pcm_oss_file;
2273         struct snd_pcm_substream *substream;
2274         unsigned int f_mode = file->f_mode;
2275
2276         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2277         *rpcm_oss_file = NULL;
2278
2279         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2280         if (pcm_oss_file == NULL)
2281                 return -ENOMEM;
2282
2283         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2284             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2285                 f_mode = FMODE_WRITE;
2286
2287         file->f_flags &= ~O_APPEND;
2288         for (idx = 0; idx < 2; idx++) {
2289                 if (setup[idx].disable)
2290                         continue;
2291                 if (! pcm->streams[idx].substream_count)
2292                         continue; /* no matching substream */
2293                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2294                         if (! (f_mode & FMODE_WRITE))
2295                                 continue;
2296                 } else {
2297                         if (! (f_mode & FMODE_READ))
2298                                 continue;
2299                 }
2300                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2301                 if (err < 0) {
2302                         snd_pcm_oss_release_file(pcm_oss_file);
2303                         return err;
2304                 }
2305
2306                 pcm_oss_file->streams[idx] = substream;
2307                 substream->file = pcm_oss_file;
2308                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2309         }
2310
2311         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2312                 snd_pcm_oss_release_file(pcm_oss_file);
2313                 return -EINVAL;
2314         }
2315
2316         file->private_data = pcm_oss_file;
2317         *rpcm_oss_file = pcm_oss_file;
2318         return 0;
2319 }
2320
2321
2322 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2323 {
2324         unsigned int idx;
2325
2326         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2327         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2328                 name[idx] = task->comm[idx];
2329         name[idx] = '\0';
2330         return 0;
2331 }
2332
2333 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2334 {
2335         int err;
2336         char task_name[32];
2337         struct snd_pcm *pcm;
2338         struct snd_pcm_oss_file *pcm_oss_file;
2339         struct snd_pcm_oss_setup setup[2];
2340         int nonblock;
2341         wait_queue_t wait;
2342
2343         pcm = snd_lookup_oss_minor_data(iminor(inode),
2344                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2345         if (pcm == NULL) {
2346                 err = -ENODEV;
2347                 goto __error1;
2348         }
2349         err = snd_card_file_add(pcm->card, file);
2350         if (err < 0)
2351                 goto __error1;
2352         if (!try_module_get(pcm->card->module)) {
2353                 err = -EFAULT;
2354                 goto __error2;
2355         }
2356         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2357                 err = -EFAULT;
2358                 goto __error;
2359         }
2360         memset(setup, 0, sizeof(setup));
2361         if (file->f_mode & FMODE_WRITE)
2362                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2363                                            task_name, &setup[0]);
2364         if (file->f_mode & FMODE_READ)
2365                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2366                                            task_name, &setup[1]);
2367
2368         nonblock = !!(file->f_flags & O_NONBLOCK);
2369         if (!nonblock)
2370                 nonblock = nonblock_open;
2371
2372         init_waitqueue_entry(&wait, current);
2373         add_wait_queue(&pcm->open_wait, &wait);
2374         mutex_lock(&pcm->open_mutex);
2375         while (1) {
2376                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2377                                             iminor(inode), setup);
2378                 if (err >= 0)
2379                         break;
2380                 if (err == -EAGAIN) {
2381                         if (nonblock) {
2382                                 err = -EBUSY;
2383                                 break;
2384                         }
2385                 } else
2386                         break;
2387                 set_current_state(TASK_INTERRUPTIBLE);
2388                 mutex_unlock(&pcm->open_mutex);
2389                 schedule();
2390                 mutex_lock(&pcm->open_mutex);
2391                 if (signal_pending(current)) {
2392                         err = -ERESTARTSYS;
2393                         break;
2394                 }
2395         }
2396         remove_wait_queue(&pcm->open_wait, &wait);
2397         mutex_unlock(&pcm->open_mutex);
2398         if (err < 0)
2399                 goto __error;
2400         return err;
2401
2402       __error:
2403         module_put(pcm->card->module);
2404       __error2:
2405         snd_card_file_remove(pcm->card, file);
2406       __error1:
2407         return err;
2408 }
2409
2410 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2411 {
2412         struct snd_pcm *pcm;
2413         struct snd_pcm_substream *substream;
2414         struct snd_pcm_oss_file *pcm_oss_file;
2415
2416         pcm_oss_file = file->private_data;
2417         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2418         if (substream == NULL)
2419                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2420         snd_assert(substream != NULL, return -ENXIO);
2421         pcm = substream->pcm;
2422         if (!pcm->card->shutdown)
2423                 snd_pcm_oss_sync(pcm_oss_file);
2424         mutex_lock(&pcm->open_mutex);
2425         snd_pcm_oss_release_file(pcm_oss_file);
2426         mutex_unlock(&pcm->open_mutex);
2427         wake_up(&pcm->open_wait);
2428         module_put(pcm->card->module);
2429         snd_card_file_remove(pcm->card, file);
2430         return 0;
2431 }
2432
2433 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2434 {
2435         struct snd_pcm_oss_file *pcm_oss_file;
2436         int __user *p = (int __user *)arg;
2437         int res;
2438
2439         pcm_oss_file = file->private_data;
2440         if (cmd == OSS_GETVERSION)
2441                 return put_user(SNDRV_OSS_VERSION, p);
2442         if (cmd == OSS_ALSAEMULVER)
2443                 return put_user(1, p);
2444 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2445         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2446                 struct snd_pcm_substream *substream;
2447                 int idx;
2448                 for (idx = 0; idx < 2; ++idx) {
2449                         substream = pcm_oss_file->streams[idx];
2450                         if (substream != NULL)
2451                                 break;
2452                 }
2453                 snd_assert(substream != NULL, return -ENXIO);
2454                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2455         }
2456 #endif
2457         if (((cmd >> 8) & 0xff) != 'P')
2458                 return -EINVAL;
2459 #ifdef OSS_DEBUG
2460         printk("pcm_oss: ioctl = 0x%x\n", cmd);
2461 #endif
2462         switch (cmd) {
2463         case SNDCTL_DSP_RESET:
2464                 return snd_pcm_oss_reset(pcm_oss_file);
2465         case SNDCTL_DSP_SYNC:
2466                 return snd_pcm_oss_sync(pcm_oss_file);
2467         case SNDCTL_DSP_SPEED:
2468                 if (get_user(res, p))
2469                         return -EFAULT;
2470                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2471                         return res;
2472                 return put_user(res, p);
2473         case SOUND_PCM_READ_RATE:
2474                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2475                 if (res < 0)
2476                         return res;
2477                 return put_user(res, p);
2478         case SNDCTL_DSP_STEREO:
2479                 if (get_user(res, p))
2480                         return -EFAULT;
2481                 res = res > 0 ? 2 : 1;
2482                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2483                         return res;
2484                 return put_user(--res, p);
2485         case SNDCTL_DSP_GETBLKSIZE:
2486                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2487                 if (res < 0)
2488                         return res;
2489                 return put_user(res, p);
2490         case SNDCTL_DSP_SETFMT:
2491                 if (get_user(res, p))
2492                         return -EFAULT;
2493                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2494                 if (res < 0)
2495                         return res;
2496                 return put_user(res, p);
2497         case SOUND_PCM_READ_BITS:
2498                 res = snd_pcm_oss_get_format(pcm_oss_file);
2499                 if (res < 0)
2500                         return res;
2501                 return put_user(res, p);
2502         case SNDCTL_DSP_CHANNELS:
2503                 if (get_user(res, p))
2504                         return -EFAULT;
2505                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2506                 if (res < 0)
2507                         return res;
2508                 return put_user(res, p);
2509         case SOUND_PCM_READ_CHANNELS:
2510                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2511                 if (res < 0)
2512                         return res;
2513                 return put_user(res, p);
2514         case SOUND_PCM_WRITE_FILTER:
2515         case SOUND_PCM_READ_FILTER:
2516                 return -EIO;
2517         case SNDCTL_DSP_POST:
2518                 return snd_pcm_oss_post(pcm_oss_file);
2519         case SNDCTL_DSP_SUBDIVIDE:
2520                 if (get_user(res, p))
2521                         return -EFAULT;
2522                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2523                 if (res < 0)
2524                         return res;
2525                 return put_user(res, p);
2526         case SNDCTL_DSP_SETFRAGMENT:
2527                 if (get_user(res, p))
2528                         return -EFAULT;
2529                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2530         case SNDCTL_DSP_GETFMTS:
2531                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2532                 if (res < 0)
2533                         return res;
2534                 return put_user(res, p);
2535         case SNDCTL_DSP_GETOSPACE:
2536         case SNDCTL_DSP_GETISPACE:
2537                 return snd_pcm_oss_get_space(pcm_oss_file,
2538                         cmd == SNDCTL_DSP_GETISPACE ?
2539                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2540                         (struct audio_buf_info __user *) arg);
2541         case SNDCTL_DSP_NONBLOCK:
2542                 return snd_pcm_oss_nonblock(file);
2543         case SNDCTL_DSP_GETCAPS:
2544                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2545                 if (res < 0)
2546                         return res;
2547                 return put_user(res, p);
2548         case SNDCTL_DSP_GETTRIGGER:
2549                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2550                 if (res < 0)
2551                         return res;
2552                 return put_user(res, p);
2553         case SNDCTL_DSP_SETTRIGGER:
2554                 if (get_user(res, p))
2555                         return -EFAULT;
2556                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2557         case SNDCTL_DSP_GETIPTR:
2558         case SNDCTL_DSP_GETOPTR:
2559                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2560                         cmd == SNDCTL_DSP_GETIPTR ?
2561                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2562                         (struct count_info __user *) arg);
2563         case SNDCTL_DSP_MAPINBUF:
2564         case SNDCTL_DSP_MAPOUTBUF:
2565                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2566                         cmd == SNDCTL_DSP_MAPINBUF ?
2567                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2568                         (struct buffmem_desc __user *) arg);
2569         case SNDCTL_DSP_SETSYNCRO:
2570                 /* stop DMA now.. */
2571                 return 0;
2572         case SNDCTL_DSP_SETDUPLEX:
2573                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2574                         return 0;
2575                 return -EIO;
2576         case SNDCTL_DSP_GETODELAY:
2577                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2578                 if (res < 0) {
2579                         /* it's for sure, some broken apps don't check for error codes */
2580                         put_user(0, p);
2581                         return res;
2582                 }
2583                 return put_user(res, p);
2584         case SNDCTL_DSP_PROFILE:
2585                 return 0;       /* silently ignore */
2586         default:
2587                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2588         }
2589         return -EINVAL;
2590 }
2591
2592 #ifdef CONFIG_COMPAT
2593 /* all compatible */
2594 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2595 #else
2596 #define snd_pcm_oss_ioctl_compat        NULL
2597 #endif
2598
2599 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2600 {
2601         struct snd_pcm_oss_file *pcm_oss_file;
2602         struct snd_pcm_substream *substream;
2603
2604         pcm_oss_file = file->private_data;
2605         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2606         if (substream == NULL)
2607                 return -ENXIO;
2608         substream->f_flags = file->f_flags & O_NONBLOCK;
2609 #ifndef OSS_DEBUG
2610         return snd_pcm_oss_read1(substream, buf, count);
2611 #else
2612         {
2613                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2614                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2615                 return res;
2616         }
2617 #endif
2618 }
2619
2620 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2621 {
2622         struct snd_pcm_oss_file *pcm_oss_file;
2623         struct snd_pcm_substream *substream;
2624         long result;
2625
2626         pcm_oss_file = file->private_data;
2627         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2628         if (substream == NULL)
2629                 return -ENXIO;
2630         substream->f_flags = file->f_flags & O_NONBLOCK;
2631         result = snd_pcm_oss_write1(substream, buf, count);
2632 #ifdef OSS_DEBUG
2633         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2634 #endif
2635         return result;
2636 }
2637
2638 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2639 {
2640         struct snd_pcm_runtime *runtime = substream->runtime;
2641         if (atomic_read(&substream->mmap_count))
2642                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2643         else
2644                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2645 }
2646
2647 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2648 {
2649         struct snd_pcm_runtime *runtime = substream->runtime;
2650         if (atomic_read(&substream->mmap_count))
2651                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2652         else
2653                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2654 }
2655
2656 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2657 {
2658         struct snd_pcm_oss_file *pcm_oss_file;
2659         unsigned int mask;
2660         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2661
2662         pcm_oss_file = file->private_data;
2663
2664         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2665         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2666
2667         mask = 0;
2668         if (psubstream != NULL) {
2669                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2670                 poll_wait(file, &runtime->sleep, wait);
2671                 snd_pcm_stream_lock_irq(psubstream);
2672                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2673                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2674                      snd_pcm_oss_playback_ready(psubstream)))
2675                         mask |= POLLOUT | POLLWRNORM;
2676                 snd_pcm_stream_unlock_irq(psubstream);
2677         }
2678         if (csubstream != NULL) {
2679                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2680                 snd_pcm_state_t ostate;
2681                 poll_wait(file, &runtime->sleep, wait);
2682                 snd_pcm_stream_lock_irq(csubstream);
2683                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2684                     snd_pcm_oss_capture_ready(csubstream))
2685                         mask |= POLLIN | POLLRDNORM;
2686                 snd_pcm_stream_unlock_irq(csubstream);
2687                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2688                         struct snd_pcm_oss_file ofile;
2689                         memset(&ofile, 0, sizeof(ofile));
2690                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2691                         runtime->oss.trigger = 0;
2692                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2693                 }
2694         }
2695
2696         return mask;
2697 }
2698
2699 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2700 {
2701         struct snd_pcm_oss_file *pcm_oss_file;
2702         struct snd_pcm_substream *substream = NULL;
2703         struct snd_pcm_runtime *runtime;
2704         int err;
2705
2706 #ifdef OSS_DEBUG
2707         printk("pcm_oss: mmap begin\n");
2708 #endif
2709         pcm_oss_file = file->private_data;
2710         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2711         case VM_READ | VM_WRITE:
2712                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2713                 if (substream)
2714                         break;
2715                 /* Fall through */
2716         case VM_READ:
2717                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2718                 break;
2719         case VM_WRITE:
2720                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2721                 break;
2722         default:
2723                 return -EINVAL;
2724         }
2725         /* set VM_READ access as well to fix memset() routines that do
2726            reads before writes (to improve performance) */
2727         area->vm_flags |= VM_READ;
2728         if (substream == NULL)
2729                 return -ENXIO;
2730         runtime = substream->runtime;
2731         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2732                 return -EIO;
2733         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2734                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2735         else
2736                 return -EIO;
2737
2738         if (runtime->oss.params) {
2739                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2740                         return err;
2741         }
2742 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2743         if (runtime->oss.plugin_first != NULL)
2744                 return -EIO;
2745 #endif
2746
2747         if (area->vm_pgoff != 0)
2748                 return -EINVAL;
2749
2750         err = snd_pcm_mmap_data(substream, file, area);
2751         if (err < 0)
2752                 return err;
2753         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2754         runtime->silence_threshold = 0;
2755         runtime->silence_size = 0;
2756 #ifdef OSS_DEBUG
2757         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2758 #endif
2759         /* In mmap mode we never stop */
2760         runtime->stop_threshold = runtime->boundary;
2761
2762         return 0;
2763 }
2764
2765 #ifdef CONFIG_SND_VERBOSE_PROCFS
2766 /*
2767  *  /proc interface
2768  */
2769
2770 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2771                                   struct snd_info_buffer *buffer)
2772 {
2773         struct snd_pcm_str *pstr = entry->private_data;
2774         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2775         mutex_lock(&pstr->oss.setup_mutex);
2776         while (setup) {
2777                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2778                             setup->task_name,
2779                             setup->periods,
2780                             setup->period_size,
2781                             setup->disable ? " disable" : "",
2782                             setup->direct ? " direct" : "",
2783                             setup->block ? " block" : "",
2784                             setup->nonblock ? " non-block" : "",
2785                             setup->partialfrag ? " partial-frag" : "",
2786                             setup->nosilence ? " no-silence" : "");
2787                 setup = setup->next;
2788         }
2789         mutex_unlock(&pstr->oss.setup_mutex);
2790 }
2791
2792 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2793 {
2794         struct snd_pcm_oss_setup *setup, *setupn;
2795
2796         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2797              setup; setup = setupn) {
2798                 setupn = setup->next;
2799                 kfree(setup->task_name);
2800                 kfree(setup);
2801         }
2802         pstr->oss.setup_list = NULL;
2803 }
2804
2805 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2806                                    struct snd_info_buffer *buffer)
2807 {
2808         struct snd_pcm_str *pstr = entry->private_data;
2809         char line[128], str[32], task_name[32], *ptr;
2810         int idx1;
2811         struct snd_pcm_oss_setup *setup, *setup1, template;
2812
2813         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2814                 mutex_lock(&pstr->oss.setup_mutex);
2815                 memset(&template, 0, sizeof(template));
2816                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2817                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2818                         snd_pcm_oss_proc_free_setup_list(pstr);
2819                         mutex_unlock(&pstr->oss.setup_mutex);
2820                         continue;
2821                 }
2822                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2823                         if (!strcmp(setup->task_name, task_name)) {
2824                                 template = *setup;
2825                                 break;
2826                         }
2827                 }
2828                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2829                 template.periods = simple_strtoul(str, NULL, 10);
2830                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2831                 template.period_size = simple_strtoul(str, NULL, 10);
2832                 for (idx1 = 31; idx1 >= 0; idx1--)
2833                         if (template.period_size & (1 << idx1))
2834                                 break;
2835                 for (idx1--; idx1 >= 0; idx1--)
2836                         template.period_size &= ~(1 << idx1);
2837                 do {
2838                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2839                         if (!strcmp(str, "disable")) {
2840                                 template.disable = 1;
2841                         } else if (!strcmp(str, "direct")) {
2842                                 template.direct = 1;
2843                         } else if (!strcmp(str, "block")) {
2844                                 template.block = 1;
2845                         } else if (!strcmp(str, "non-block")) {
2846                                 template.nonblock = 1;
2847                         } else if (!strcmp(str, "partial-frag")) {
2848                                 template.partialfrag = 1;
2849                         } else if (!strcmp(str, "no-silence")) {
2850                                 template.nosilence = 1;
2851                         } else if (!strcmp(str, "buggy-ptr")) {
2852                                 template.buggyptr = 1;
2853                         }
2854                 } while (*str);
2855                 if (setup == NULL) {
2856                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2857                         if (! setup) {
2858                                 buffer->error = -ENOMEM;
2859                                 mutex_lock(&pstr->oss.setup_mutex);
2860                                 return;
2861                         }
2862                         if (pstr->oss.setup_list == NULL)
2863                                 pstr->oss.setup_list = setup;
2864                         else {
2865                                 for (setup1 = pstr->oss.setup_list;
2866                                      setup1->next; setup1 = setup1->next);
2867                                 setup1->next = setup;
2868                         }
2869                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2870                         if (! template.task_name) {
2871                                 kfree(setup);
2872                                 buffer->error = -ENOMEM;
2873                                 mutex_lock(&pstr->oss.setup_mutex);
2874                                 return;
2875                         }
2876                 }
2877                 *setup = template;
2878                 mutex_unlock(&pstr->oss.setup_mutex);
2879         }
2880 }
2881
2882 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2883 {
2884         int stream;
2885         for (stream = 0; stream < 2; ++stream) {
2886                 struct snd_info_entry *entry;
2887                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2888                 if (pstr->substream_count == 0)
2889                         continue;
2890                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2891                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2892                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2893                         entry->c.text.read = snd_pcm_oss_proc_read;
2894                         entry->c.text.write = snd_pcm_oss_proc_write;
2895                         entry->private_data = pstr;
2896                         if (snd_info_register(entry) < 0) {
2897                                 snd_info_free_entry(entry);
2898                                 entry = NULL;
2899                         }
2900                 }
2901                 pstr->oss.proc_entry = entry;
2902         }
2903 }
2904
2905 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2906 {
2907         int stream;
2908         for (stream = 0; stream < 2; ++stream) {
2909                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2910                 snd_info_free_entry(pstr->oss.proc_entry);
2911                 pstr->oss.proc_entry = NULL;
2912                 snd_pcm_oss_proc_free_setup_list(pstr);
2913         }
2914 }
2915 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2916 #define snd_pcm_oss_proc_init(pcm)
2917 #define snd_pcm_oss_proc_done(pcm)
2918 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2919
2920 /*
2921  *  ENTRY functions
2922  */
2923
2924 static const struct file_operations snd_pcm_oss_f_reg =
2925 {
2926         .owner =        THIS_MODULE,
2927         .read =         snd_pcm_oss_read,
2928         .write =        snd_pcm_oss_write,
2929         .open =         snd_pcm_oss_open,
2930         .release =      snd_pcm_oss_release,
2931         .poll =         snd_pcm_oss_poll,
2932         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2933         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2934         .mmap =         snd_pcm_oss_mmap,
2935 };
2936
2937 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2938 {
2939         char name[128];
2940         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2941         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2942                                     pcm->card, index, &snd_pcm_oss_f_reg,
2943                                     pcm, name) < 0) {
2944                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2945                            pcm->card->number, pcm->device);
2946         }
2947 }
2948
2949 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2950 {
2951         pcm->oss.reg = 0;
2952         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2953                 char name[128];
2954                 int duplex;
2955                 register_oss_dsp(pcm, 0);
2956                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2957                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2958                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2959                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2960 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2961                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2962                                       pcm->card->number,
2963                                       name);
2964 #endif
2965                 pcm->oss.reg++;
2966                 pcm->oss.reg_mask |= 1;
2967         }
2968         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2969                 register_oss_dsp(pcm, 1);
2970                 pcm->oss.reg++;
2971                 pcm->oss.reg_mask |= 2;
2972         }
2973
2974         if (pcm->oss.reg)
2975                 snd_pcm_oss_proc_init(pcm);
2976
2977         return 0;
2978 }
2979
2980 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2981 {
2982         if (pcm->oss.reg) {
2983                 if (pcm->oss.reg_mask & 1) {
2984                         pcm->oss.reg_mask &= ~1;
2985                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2986                                                   pcm->card, 0);
2987                 }
2988                 if (pcm->oss.reg_mask & 2) {
2989                         pcm->oss.reg_mask &= ~2;
2990                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2991                                                   pcm->card, 1);
2992                 }
2993                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2994 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2995                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2996 #endif
2997                 }
2998                 pcm->oss.reg = 0;
2999         }
3000         return 0;
3001 }
3002
3003 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3004 {
3005         snd_pcm_oss_disconnect_minor(pcm);
3006         snd_pcm_oss_proc_done(pcm);
3007         return 0;
3008 }
3009
3010 static struct snd_pcm_notify snd_pcm_oss_notify =
3011 {
3012         .n_register =   snd_pcm_oss_register_minor,
3013         .n_disconnect = snd_pcm_oss_disconnect_minor,
3014         .n_unregister = snd_pcm_oss_unregister_minor,
3015 };
3016
3017 static int __init alsa_pcm_oss_init(void)
3018 {
3019         int i;
3020         int err;
3021
3022         /* check device map table */
3023         for (i = 0; i < SNDRV_CARDS; i++) {
3024                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3025                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3026                                    i, dsp_map[i]);
3027                         dsp_map[i] = 0;
3028                 }
3029                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3030                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3031                                    i, adsp_map[i]);
3032                         adsp_map[i] = 1;
3033                 }
3034         }
3035         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3036                 return err;
3037         return 0;
3038 }
3039
3040 static void __exit alsa_pcm_oss_exit(void)
3041 {
3042         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3043 }
3044
3045 module_init(alsa_pcm_oss_init)
3046 module_exit(alsa_pcm_oss_exit)