sound/core/oss/pcm_oss.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer / OSS compatible
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #if 0
  23 #define PLUGIN_DEBUG
  24 #endif
  25 #if 0
  26 #define OSS_DEBUG
  27 #endif
  28
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/time.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/module.h>
  34 #include <linux/math64.h>
  35 #include <linux/string.h>
  36 #include <sound/core.h>
  37 #include <sound/minors.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include "pcm_plugin.h"
  41 #include <sound/info.h>
  42 #include <linux/soundcard.h>
  43 #include <sound/initval.h>
  44 #include <sound/mixer_oss.h>
  45
  46 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  47
  48 static int dsp_map[SNDRV_CARDS];
  49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  50 static int nonblock_open = 1;
  51
  52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  54 MODULE_LICENSE("GPL");
  55 module_param_array(dsp_map, int, NULL, 0444);
  56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  57 module_param_array(adsp_map, int, NULL, 0444);
  58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  59 module_param(nonblock_open, bool, 0644);
  60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  63
  64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  67
  68 static inline mm_segment_t snd_enter_user(void)
  69 {
  70         mm_segment_t fs = get_fs();
  71         set_fs(get_ds());
  72         return fs;
  73 }
  74
  75 static inline void snd_leave_user(mm_segment_t fs)
  76 {
  77         set_fs(fs);
  78 }
  79
  80 /*
  81  * helper functions to process hw_params
  82  */
  83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
  84 {
  85         int changed = 0;
  86         if (i->min < min) {
  87                 i->min = min;
  88                 i->openmin = openmin;
  89                 changed = 1;
  90         } else if (i->min == min && !i->openmin && openmin) {
  91                 i->openmin = 1;
  92                 changed = 1;
  93         }
  94         if (i->integer) {
  95                 if (i->openmin) {
  96                         i->min++;
  97                         i->openmin = 0;
  98                 }
  99         }
 100         if (snd_interval_checkempty(i)) {
 101                 snd_interval_none(i);
 102                 return -EINVAL;
 103         }
 104         return changed;
 105 }
 106
 107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
 108 {
 109         int changed = 0;
 110         if (i->max > max) {
 111                 i->max = max;
 112                 i->openmax = openmax;
 113                 changed = 1;
 114         } else if (i->max == max && !i->openmax && openmax) {
 115                 i->openmax = 1;
 116                 changed = 1;
 117         }
 118         if (i->integer) {
 119                 if (i->openmax) {
 120                         i->max--;
 121                         i->openmax = 0;
 122                 }
 123         }
 124         if (snd_interval_checkempty(i)) {
 125                 snd_interval_none(i);
 126                 return -EINVAL;
 127         }
 128         return changed;
 129 }
 130
 131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
 132 {
 133         struct snd_interval t;
 134         t.empty = 0;
 135         t.min = t.max = val;
 136         t.openmin = t.openmax = 0;
 137         t.integer = 1;
 138         return snd_interval_refine(i, &t);
 139 }
 140
 141 /**
 142  * snd_pcm_hw_param_value_min
 143  * @params: the hw_params instance
 144  * @var: parameter to retrieve
 145  * @dir: pointer to the direction (-1,0,1) or NULL
 146  *
 147  * Return the minimum value for field PAR.
 148  */
 149 static unsigned int
 150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
 151                            snd_pcm_hw_param_t var, int *dir)
 152 {
 153         if (hw_is_mask(var)) {
 154                 if (dir)
 155                         *dir = 0;
 156                 return snd_mask_min(hw_param_mask_c(params, var));
 157         }
 158         if (hw_is_interval(var)) {
 159                 const struct snd_interval *i = hw_param_interval_c(params, var);
 160                 if (dir)
 161                         *dir = i->openmin;
 162                 return snd_interval_min(i);
 163         }
 164         return -EINVAL;
 165 }
 166
 167 /**
 168  * snd_pcm_hw_param_value_max
 169  * @params: the hw_params instance
 170  * @var: parameter to retrieve
 171  * @dir: pointer to the direction (-1,0,1) or NULL
 172  *
 173  * Return the maximum value for field PAR.
 174  */
 175 static unsigned int
 176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 177                            snd_pcm_hw_param_t var, int *dir)
 178 {
 179         if (hw_is_mask(var)) {
 180                 if (dir)
 181                         *dir = 0;
 182                 return snd_mask_max(hw_param_mask_c(params, var));
 183         }
 184         if (hw_is_interval(var)) {
 185                 const struct snd_interval *i = hw_param_interval_c(params, var);
 186                 if (dir)
 187                         *dir = - (int) i->openmax;
 188                 return snd_interval_max(i);
 189         }
 190         return -EINVAL;
 191 }
 192
 193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
 194                                   snd_pcm_hw_param_t var,
 195                                   const struct snd_mask *val)
 196 {
 197         int changed;
 198         changed = snd_mask_refine(hw_param_mask(params, var), val);
 199         if (changed) {
 200                 params->cmask |= 1 << var;
 201                 params->rmask |= 1 << var;
 202         }
 203         return changed;
 204 }
 205
 206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
 207                                  struct snd_pcm_hw_params *params,
 208                                  snd_pcm_hw_param_t var,
 209                                  const struct snd_mask *val)
 210 {
 211         int changed = _snd_pcm_hw_param_mask(params, var, val);
 212         if (changed < 0)
 213                 return changed;
 214         if (params->rmask) {
 215                 int err = snd_pcm_hw_refine(pcm, params);
 216                 if (err < 0)
 217                         return err;
 218         }
 219         return 0;
 220 }
 221
 222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
 223                                  snd_pcm_hw_param_t var, unsigned int val,
 224                                  int dir)
 225 {
 226         int changed;
 227         int open = 0;
 228         if (dir) {
 229                 if (dir > 0) {
 230                         open = 1;
 231                 } else if (dir < 0) {
 232                         if (val > 0) {
 233                                 open = 1;
 234                                 val--;
 235                         }
 236                 }
 237         }
 238         if (hw_is_mask(var))
 239                 changed = snd_mask_refine_min(hw_param_mask(params, var),
 240                                               val + !!open);
 241         else if (hw_is_interval(var))
 242                 changed = snd_interval_refine_min(hw_param_interval(params, var),
 243                                                   val, open);
 244         else
 245                 return -EINVAL;
 246         if (changed) {
 247                 params->cmask |= 1 << var;
 248                 params->rmask |= 1 << var;
 249         }
 250         return changed;
 251 }
 252
 253 /**
 254  * snd_pcm_hw_param_min
 255  * @pcm: PCM instance
 256  * @params: the hw_params instance
 257  * @var: parameter to retrieve
 258  * @val: minimal value
 259  * @dir: pointer to the direction (-1,0,1) or NULL
 260  *
 261  * Inside configuration space defined by PARAMS remove from PAR all
 262  * values < VAL. Reduce configuration space accordingly.
 263  * Return new minimum or -EINVAL if the configuration space is empty
 264  */
 265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
 266                                 struct snd_pcm_hw_params *params,
 267                                 snd_pcm_hw_param_t var, unsigned int val,
 268                                 int *dir)
 269 {
 270         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
 271         if (changed < 0)
 272                 return changed;
 273         if (params->rmask) {
 274                 int err = snd_pcm_hw_refine(pcm, params);
 275                 if (err < 0)
 276                         return err;
 277         }
 278         return snd_pcm_hw_param_value_min(params, var, dir);
 279 }
 280
 281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
 282                                  snd_pcm_hw_param_t var, unsigned int val,
 283                                  int dir)
 284 {
 285         int changed;
 286         int open = 0;
 287         if (dir) {
 288                 if (dir < 0) {
 289                         open = 1;
 290                 } else if (dir > 0) {
 291                         open = 1;
 292                         val++;
 293                 }
 294         }
 295         if (hw_is_mask(var)) {
 296                 if (val == 0 && open) {
 297                         snd_mask_none(hw_param_mask(params, var));
 298                         changed = -EINVAL;
 299                 } else
 300                         changed = snd_mask_refine_max(hw_param_mask(params, var),
 301                                                       val - !!open);
 302         } else if (hw_is_interval(var))
 303                 changed = snd_interval_refine_max(hw_param_interval(params, var),
 304                                                   val, open);
 305         else
 306                 return -EINVAL;
 307         if (changed) {
 308                 params->cmask |= 1 << var;
 309                 params->rmask |= 1 << var;
 310         }
 311         return changed;
 312 }
 313
 314 /**
 315  * snd_pcm_hw_param_max
 316  * @pcm: PCM instance
 317  * @params: the hw_params instance
 318  * @var: parameter to retrieve
 319  * @val: maximal value
 320  * @dir: pointer to the direction (-1,0,1) or NULL
 321  *
 322  * Inside configuration space defined by PARAMS remove from PAR all
 323  *  values >= VAL + 1. Reduce configuration space accordingly.
 324  *  Return new maximum or -EINVAL if the configuration space is empty
 325  */
 326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
 327                                 struct snd_pcm_hw_params *params,
 328                                 snd_pcm_hw_param_t var, unsigned int val,
 329                                 int *dir)
 330 {
 331         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
 332         if (changed < 0)
 333                 return changed;
 334         if (params->rmask) {
 335                 int err = snd_pcm_hw_refine(pcm, params);
 336                 if (err < 0)
 337                         return err;
 338         }
 339         return snd_pcm_hw_param_value_max(params, var, dir);
 340 }
 341
 342 static int boundary_sub(int a, int adir,
 343                         int b, int bdir,
 344                         int *c, int *cdir)
 345 {
 346         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
 347         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
 348         *c = a - b;
 349         *cdir = adir - bdir;
 350         if (*cdir == -2) {
 351                 (*c)--;
 352         } else if (*cdir == 2) {
 353                 (*c)++;
 354         }
 355         return 0;
 356 }
 357
 358 static int boundary_lt(unsigned int a, int adir,
 359                        unsigned int b, int bdir)
 360 {
 361         if (adir < 0) {
 362                 a--;
 363                 adir = 1;
 364         } else if (adir > 0)
 365                 adir = 1;
 366         if (bdir < 0) {
 367                 b--;
 368                 bdir = 1;
 369         } else if (bdir > 0)
 370                 bdir = 1;
 371         return a < b || (a == b && adir < bdir);
 372 }
 373
 374 /* Return 1 if min is nearer to best than max */
 375 static int boundary_nearer(int min, int mindir,
 376                            int best, int bestdir,
 377                            int max, int maxdir)
 378 {
 379         int dmin, dmindir;
 380         int dmax, dmaxdir;
 381         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
 382         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
 383         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
 384 }
 385
 386 /**
 387  * snd_pcm_hw_param_near
 388  * @pcm: PCM instance
 389  * @params: the hw_params instance
 390  * @var: parameter to retrieve
 391  * @best: value to set
 392  * @dir: pointer to the direction (-1,0,1) or NULL
 393  *
 394  * Inside configuration space defined by PARAMS set PAR to the available value
 395  * nearest to VAL. Reduce configuration space accordingly.
 396  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
 397  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
 398  * Return the value found.
 399   */
 400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 401                                  struct snd_pcm_hw_params *params,
 402                                  snd_pcm_hw_param_t var, unsigned int best,
 403                                  int *dir)
 404 {
 405         struct snd_pcm_hw_params *save = NULL;
 406         int v;
 407         unsigned int saved_min;
 408         int last = 0;
 409         int min, max;
 410         int mindir, maxdir;
 411         int valdir = dir ? *dir : 0;
 412         /* FIXME */
 413         if (best > INT_MAX)
 414                 best = INT_MAX;
 415         min = max = best;
 416         mindir = maxdir = valdir;
 417         if (maxdir > 0)
 418                 maxdir = 0;
 419         else if (maxdir == 0)
 420                 maxdir = -1;
 421         else {
 422                 maxdir = 1;
 423                 max--;
 424         }
 425         save = kmalloc(sizeof(*save), GFP_KERNEL);
 426         if (save == NULL)
 427                 return -ENOMEM;
 428         *save = *params;
 429         saved_min = min;
 430         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
 431         if (min >= 0) {
 432                 struct snd_pcm_hw_params *params1;
 433                 if (max < 0)
 434                         goto _end;
 435                 if ((unsigned int)min == saved_min && mindir == valdir)
 436                         goto _end;
 437                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
 438                 if (params1 == NULL) {
 439                         kfree(save);
 440                         return -ENOMEM;
 441                 }
 442                 *params1 = *save;
 443                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
 444                 if (max < 0) {
 445                         kfree(params1);
 446                         goto _end;
 447                 }
 448                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
 449                         *params = *params1;
 450                         last = 1;
 451                 }
 452                 kfree(params1);
 453         } else {
 454                 *params = *save;
 455                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
 456                 if (max < 0) {
 457                         kfree(save);
 458                         return max;
 459                 }
 460                 last = 1;
 461         }
 462  _end:
 463         kfree(save);
 464         if (last)
 465                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 466         else
 467                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 468         snd_BUG_ON(v < 0);
 469         return v;
 470 }
 471
 472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 473                                  snd_pcm_hw_param_t var, unsigned int val,
 474                                  int dir)
 475 {
 476         int changed;
 477         if (hw_is_mask(var)) {
 478                 struct snd_mask *m = hw_param_mask(params, var);
 479                 if (val == 0 && dir < 0) {
 480                         changed = -EINVAL;
 481                         snd_mask_none(m);
 482                 } else {
 483                         if (dir > 0)
 484                                 val++;
 485                         else if (dir < 0)
 486                                 val--;
 487                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 488                 }
 489         } else if (hw_is_interval(var)) {
 490                 struct snd_interval *i = hw_param_interval(params, var);
 491                 if (val == 0 && dir < 0) {
 492                         changed = -EINVAL;
 493                         snd_interval_none(i);
 494                 } else if (dir == 0)
 495                         changed = snd_interval_refine_set(i, val);
 496                 else {
 497                         struct snd_interval t;
 498                         t.openmin = 1;
 499                         t.openmax = 1;
 500                         t.empty = 0;
 501                         t.integer = 0;
 502                         if (dir < 0) {
 503                                 t.min = val - 1;
 504                                 t.max = val;
 505                         } else {
 506                                 t.min = val;
 507                                 t.max = val+1;
 508                         }
 509                         changed = snd_interval_refine(i, &t);
 510                 }
 511         } else
 512                 return -EINVAL;
 513         if (changed) {
 514                 params->cmask |= 1 << var;
 515                 params->rmask |= 1 << var;
 516         }
 517         return changed;
 518 }
 519
 520 /**
 521  * snd_pcm_hw_param_set
 522  * @pcm: PCM instance
 523  * @params: the hw_params instance
 524  * @var: parameter to retrieve
 525  * @val: value to set
 526  * @dir: pointer to the direction (-1,0,1) or NULL
 527  *
 528  * Inside configuration space defined by PARAMS remove from PAR all
 529  * values != VAL. Reduce configuration space accordingly.
 530  *  Return VAL or -EINVAL if the configuration space is empty
 531  */
 532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 533                                 struct snd_pcm_hw_params *params,
 534                                 snd_pcm_hw_param_t var, unsigned int val,
 535                                 int dir)
 536 {
 537         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 538         if (changed < 0)
 539                 return changed;
 540         if (params->rmask) {
 541                 int err = snd_pcm_hw_refine(pcm, params);
 542                 if (err < 0)
 543                         return err;
 544         }
 545         return snd_pcm_hw_param_value(params, var, NULL);
 546 }
 547
 548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 549                                         snd_pcm_hw_param_t var)
 550 {
 551         int changed;
 552         changed = snd_interval_setinteger(hw_param_interval(params, var));
 553         if (changed) {
 554                 params->cmask |= 1 << var;
 555                 params->rmask |= 1 << var;
 556         }
 557         return changed;
 558 }
 559
 560 /*
 561  * plugin
 562  */
 563
 564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 566 {
 567         struct snd_pcm_runtime *runtime = substream->runtime;
 568         struct snd_pcm_plugin *plugin, *next;
 569
 570         plugin = runtime->oss.plugin_first;
 571         while (plugin) {
 572                 next = plugin->next;
 573                 snd_pcm_plugin_free(plugin);
 574                 plugin = next;
 575         }
 576         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 577         return 0;
 578 }
 579
 580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 581 {
 582         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 583         plugin->next = runtime->oss.plugin_first;
 584         plugin->prev = NULL;
 585         if (runtime->oss.plugin_first) {
 586                 runtime->oss.plugin_first->prev = plugin;
 587                 runtime->oss.plugin_first = plugin;
 588         } else {
 589                 runtime->oss.plugin_last =
 590                 runtime->oss.plugin_first = plugin;
 591         }
 592         return 0;
 593 }
 594
 595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 596 {
 597         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 598         plugin->next = NULL;
 599         plugin->prev = runtime->oss.plugin_last;
 600         if (runtime->oss.plugin_last) {
 601                 runtime->oss.plugin_last->next = plugin;
 602                 runtime->oss.plugin_last = plugin;
 603         } else {
 604                 runtime->oss.plugin_last =
 605                 runtime->oss.plugin_first = plugin;
 606         }
 607         return 0;
 608 }
 609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 610
 611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 612 {
 613         struct snd_pcm_runtime *runtime = substream->runtime;
 614         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 615         long bytes = frames_to_bytes(runtime, frames);
 616         if (buffer_size == runtime->oss.buffer_bytes)
 617                 return bytes;
 618 #if BITS_PER_LONG >= 64
 619         return runtime->oss.buffer_bytes * bytes / buffer_size;
 620 #else
 621         {
 622                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 623                 return div_u64(bsize, buffer_size);
 624         }
 625 #endif
 626 }
 627
 628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 629 {
 630         struct snd_pcm_runtime *runtime = substream->runtime;
 631         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 632         if (buffer_size == runtime->oss.buffer_bytes)
 633                 return bytes_to_frames(runtime, bytes);
 634         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 635 }
 636
 637 static inline
 638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
 639 {
 640         return runtime->hw_ptr_interrupt;
 641 }
 642
 643 /* define extended formats in the recent OSS versions (if any) */
 644 /* linear formats */
 645 #define AFMT_S32_LE      0x00001000
 646 #define AFMT_S32_BE      0x00002000
 647 #define AFMT_S24_LE      0x00008000
 648 #define AFMT_S24_BE      0x00010000
 649 #define AFMT_S24_PACKED  0x00040000
 650
 651 /* other supported formats */
 652 #define AFMT_FLOAT       0x00004000
 653 #define AFMT_SPDIF_RAW   0x00020000
 654
 655 /* unsupported formats */
 656 #define AFMT_AC3         0x00000400
 657 #define AFMT_VORBIS      0x00000800
 658
 659 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
 660 {
 661         switch (format) {
 662         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 663         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 664         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 665         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 666         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 667         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 668         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 669         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 670         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 671         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 672         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 673         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 674         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 675         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 676         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 677         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 678         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 679         default:                return SNDRV_PCM_FORMAT_U8;
 680         }
 681 }
 682
 683 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
 684 {
 685         switch (format) {
 686         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 687         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 688         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 689         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 690         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 691         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 692         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 693         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 694         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 695         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 696         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 697         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 698         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 699         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 700         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 701         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 702         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 703         default:                        return -EINVAL;
 704         }
 705 }
 706
 707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 708                                    struct snd_pcm_hw_params *oss_params,
 709                                    struct snd_pcm_hw_params *slave_params)
 710 {
 711         size_t s;
 712         size_t oss_buffer_size, oss_period_size, oss_periods;
 713         size_t min_period_size, max_period_size;
 714         struct snd_pcm_runtime *runtime = substream->runtime;
 715         size_t oss_frame_size;
 716
 717         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 718                          params_channels(oss_params) / 8;
 719
 720         oss_buffer_size = snd_pcm_plug_client_size(substream,
 721                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 722         oss_buffer_size = 1 << ld2(oss_buffer_size);
 723         if (atomic_read(&substream->mmap_count)) {
 724                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 725                         oss_buffer_size = runtime->oss.mmap_bytes;
 726         }
 727
 728         if (substream->oss.setup.period_size > 16)
 729                 oss_period_size = substream->oss.setup.period_size;
 730         else if (runtime->oss.fragshift) {
 731                 oss_period_size = 1 << runtime->oss.fragshift;
 732                 if (oss_period_size > oss_buffer_size / 2)
 733                         oss_period_size = oss_buffer_size / 2;
 734         } else {
 735                 int sd;
 736                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 737
 738                 oss_period_size = oss_buffer_size;
 739                 do {
 740                         oss_period_size /= 2;
 741                 } while (oss_period_size > bytes_per_sec);
 742                 if (runtime->oss.subdivision == 0) {
 743                         sd = 4;
 744                         if (oss_period_size / sd > 4096)
 745                                 sd *= 2;
 746                         if (oss_period_size / sd < 4096)
 747                                 sd = 1;
 748                 } else
 749                         sd = runtime->oss.subdivision;
 750                 oss_period_size /= sd;
 751                 if (oss_period_size < 16)
 752                         oss_period_size = 16;
 753         }
 754
 755         min_period_size = snd_pcm_plug_client_size(substream,
 756                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 757         min_period_size *= oss_frame_size;
 758         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 759         if (oss_period_size < min_period_size)
 760                 oss_period_size = min_period_size;
 761
 762         max_period_size = snd_pcm_plug_client_size(substream,
 763                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 764         max_period_size *= oss_frame_size;
 765         max_period_size = 1 << ld2(max_period_size);
 766         if (oss_period_size > max_period_size)
 767                 oss_period_size = max_period_size;
 768
 769         oss_periods = oss_buffer_size / oss_period_size;
 770
 771         if (substream->oss.setup.periods > 1)
 772                 oss_periods = substream->oss.setup.periods;
 773
 774         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 775         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 776                 s = runtime->oss.maxfrags;
 777         if (oss_periods > s)
 778                 oss_periods = s;
 779
 780         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 781         if (s < 2)
 782                 s = 2;
 783         if (oss_periods < s)
 784                 oss_periods = s;
 785
 786         while (oss_period_size * oss_periods > oss_buffer_size)
 787                 oss_period_size /= 2;
 788
 789         if (oss_period_size < 16)
 790                 return -EINVAL;
 791         runtime->oss.period_bytes = oss_period_size;
 792         runtime->oss.period_frames = 1;
 793         runtime->oss.periods = oss_periods;
 794         return 0;
 795 }
 796
 797 static int choose_rate(struct snd_pcm_substream *substream,
 798                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 799 {
 800         struct snd_interval *it;
 801         struct snd_pcm_hw_params *save;
 802         unsigned int rate, prev;
 803
 804         save = kmalloc(sizeof(*save), GFP_KERNEL);
 805         if (save == NULL)
 806                 return -ENOMEM;
 807         *save = *params;
 808         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 809
 810         /* try multiples of the best rate */
 811         rate = best_rate;
 812         for (;;) {
 813                 if (it->max < rate || (it->max == rate && it->openmax))
 814                         break;
 815                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 816                         int ret;
 817                         ret = snd_pcm_hw_param_set(substream, params,
 818                                                    SNDRV_PCM_HW_PARAM_RATE,
 819                                                    rate, 0);
 820                         if (ret == (int)rate) {
 821                                 kfree(save);
 822                                 return rate;
 823                         }
 824                         *params = *save;
 825                 }
 826                 prev = rate;
 827                 rate += best_rate;
 828                 if (rate <= prev)
 829                         break;
 830         }
 831
 832         /* not found, use the nearest rate */
 833         kfree(save);
 834         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 835 }
 836
 837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
 838                                      bool trylock)
 839 {
 840         struct snd_pcm_runtime *runtime = substream->runtime;
 841         struct snd_pcm_hw_params *params, *sparams;
 842         struct snd_pcm_sw_params *sw_params;
 843         ssize_t oss_buffer_size, oss_period_size;
 844         size_t oss_frame_size;
 845         int err;
 846         int direct;
 847         snd_pcm_format_t format, sformat;
 848         int n;
 849         struct snd_mask sformat_mask;
 850         struct snd_mask mask;
 851
 852         if (trylock) {
 853                 if (!(mutex_trylock(&runtime->oss.params_lock)))
 854                         return -EAGAIN;
 855         } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
 856                 return -EINTR;
 857         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 858         params = kmalloc(sizeof(*params), GFP_KERNEL);
 859         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 860         if (!sw_params || !params || !sparams) {
 861                 snd_printd("No memory\n");
 862                 err = -ENOMEM;
 863                 goto failure;
 864         }
 865
 866         if (atomic_read(&substream->mmap_count))
 867                 direct = 1;
 868         else
 869                 direct = substream->oss.setup.direct;
 870
 871         _snd_pcm_hw_params_any(sparams);
 872         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 873         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 874         snd_mask_none(&mask);
 875         if (atomic_read(&substream->mmap_count))
 876                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 877         else {
 878                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 879                 if (!direct)
 880                         snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 881         }
 882         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 883         if (err < 0) {
 884                 snd_printd("No usable accesses\n");
 885                 err = -EINVAL;
 886                 goto failure;
 887         }
 888         choose_rate(substream, sparams, runtime->oss.rate);
 889         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 890
 891         format = snd_pcm_oss_format_from(runtime->oss.format);
 892
 893         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 894         if (direct)
 895                 sformat = format;
 896         else
 897                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 898
 899         if ((__force int)sformat < 0 ||
 900             !snd_mask_test(&sformat_mask, (__force int)sformat)) {
 901                 for (sformat = (__force snd_pcm_format_t)0;
 902                      (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
 903                      sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
 904                         if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
 905                             snd_pcm_oss_format_to(sformat) >= 0)
 906                                 break;
 907                 }
 908                 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
 909                         snd_printd("Cannot find a format!!!\n");
 910                         err = -EINVAL;
 911                         goto failure;
 912                 }
 913         }
 914         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
 915         if (err < 0)
 916                 goto failure;
 917
 918         if (direct) {
 919                 memcpy(params, sparams, sizeof(*params));
 920         } else {
 921                 _snd_pcm_hw_params_any(params);
 922                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 923                                       (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 924                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 925                                       (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
 926                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 927                                       runtime->oss.channels, 0);
 928                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 929                                       runtime->oss.rate, 0);
 930                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 931                          params_access(params), params_format(params),
 932                          params_channels(params), params_rate(params));
 933         }
 934         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 935                  params_access(sparams), params_format(sparams),
 936                  params_channels(sparams), params_rate(sparams));
 937
 938         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 939                          params_channels(params) / 8;
 940
 941 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 942         snd_pcm_oss_plugin_clear(substream);
 943         if (!direct) {
 944                 /* add necessary plugins */
 945                 snd_pcm_oss_plugin_clear(substream);
 946                 if ((err = snd_pcm_plug_format_plugins(substream,
 947                                                        params,
 948                                                        sparams)) < 0) {
 949                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 950                         snd_pcm_oss_plugin_clear(substream);
 951                         goto failure;
 952                 }
 953                 if (runtime->oss.plugin_first) {
 954                         struct snd_pcm_plugin *plugin;
 955                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 956                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 957                                 snd_pcm_oss_plugin_clear(substream);
 958                                 goto failure;
 959                         }
 960                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 961                                 err = snd_pcm_plugin_append(plugin);
 962                         } else {
 963                                 err = snd_pcm_plugin_insert(plugin);
 964                         }
 965                         if (err < 0) {
 966                                 snd_pcm_oss_plugin_clear(substream);
 967                                 goto failure;
 968                         }
 969                 }
 970         }
 971 #endif
 972
 973         err = snd_pcm_oss_period_size(substream, params, sparams);
 974         if (err < 0)
 975                 goto failure;
 976
 977         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 978         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 979         if (err < 0)
 980                 goto failure;
 981
 982         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 983                                      runtime->oss.periods, NULL);
 984         if (err < 0)
 985                 goto failure;
 986
 987         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 988
 989         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 990                 snd_printd("HW_PARAMS failed: %i\n", err);
 991                 goto failure;
 992         }
 993
 994         memset(sw_params, 0, sizeof(*sw_params));
 995         if (runtime->oss.trigger) {
 996                 sw_params->start_threshold = 1;
 997         } else {
 998                 sw_params->start_threshold = runtime->boundary;
 999         }
1000         if (atomic_read(&substream->mmap_count) ||
1001             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1002                 sw_params->stop_threshold = runtime->boundary;
1003         else
1004                 sw_params->stop_threshold = runtime->buffer_size;
1005         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1006         sw_params->period_step = 1;
1007         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1008                 1 : runtime->period_size;
1009         if (atomic_read(&substream->mmap_count) ||
1010             substream->oss.setup.nosilence) {
1011                 sw_params->silence_threshold = 0;
1012                 sw_params->silence_size = 0;
1013         } else {
1014                 snd_pcm_uframes_t frames;
1015                 frames = runtime->period_size + 16;
1016                 if (frames > runtime->buffer_size)
1017                         frames = runtime->buffer_size;
1018                 sw_params->silence_threshold = frames;
1019                 sw_params->silence_size = frames;
1020         }
1021
1022         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1023                 snd_printd("SW_PARAMS failed: %i\n", err);
1024                 goto failure;
1025         }
1026
1027         runtime->oss.periods = params_periods(sparams);
1028         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1029         if (oss_period_size < 0) {
1030                 err = -EINVAL;
1031                 goto failure;
1032         }
1033 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1034         if (runtime->oss.plugin_first) {
1035                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1036                 if (err < 0)
1037                         goto failure;
1038         }
1039 #endif
1040         oss_period_size *= oss_frame_size;
1041
1042         oss_buffer_size = oss_period_size * runtime->oss.periods;
1043         if (oss_buffer_size < 0) {
1044                 err = -EINVAL;
1045                 goto failure;
1046         }
1047
1048         runtime->oss.period_bytes = oss_period_size;
1049         runtime->oss.buffer_bytes = oss_buffer_size;
1050
1051         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1052                  runtime->oss.period_bytes,
1053                  runtime->oss.buffer_bytes);
1054         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1055                  params_period_size(sparams),
1056                  params_buffer_size(sparams));
1057
1058         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1059         runtime->oss.channels = params_channels(params);
1060         runtime->oss.rate = params_rate(params);
1061
1062         vfree(runtime->oss.buffer);
1063         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1064         if (!runtime->oss.buffer) {
1065                 err = -ENOMEM;
1066                 goto failure;
1067         }
1068
1069         runtime->oss.params = 0;
1070         runtime->oss.prepare = 1;
1071         runtime->oss.buffer_used = 0;
1072         if (runtime->dma_area)
1073                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1074
1075         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1076
1077         err = 0;
1078 failure:
1079         kfree(sw_params);
1080         kfree(params);
1081         kfree(sparams);
1082         mutex_unlock(&runtime->oss.params_lock);
1083         return err;
1084 }
1085
1086 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1087 {
1088         int idx, err;
1089         struct snd_pcm_substream *asubstream = NULL, *substream;
1090
1091         for (idx = 0; idx < 2; idx++) {
1092                 substream = pcm_oss_file->streams[idx];
1093                 if (substream == NULL)
1094                         continue;
1095                 if (asubstream == NULL)
1096                         asubstream = substream;
1097                 if (substream->runtime->oss.params) {
1098                         err = snd_pcm_oss_change_params(substream, false);
1099                         if (err < 0)
1100                                 return err;
1101                 }
1102         }
1103         if (!asubstream)
1104                 return -EIO;
1105         if (r_substream)
1106                 *r_substream = asubstream;
1107         return 0;
1108 }
1109
1110 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1111 {
1112         int err;
1113         struct snd_pcm_runtime *runtime = substream->runtime;
1114
1115         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1116         if (err < 0) {
1117                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1118                 return err;
1119         }
1120         runtime->oss.prepare = 0;
1121         runtime->oss.prev_hw_ptr_period = 0;
1122         runtime->oss.period_ptr = 0;
1123         runtime->oss.buffer_used = 0;
1124
1125         return 0;
1126 }
1127
1128 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1129 {
1130         struct snd_pcm_runtime *runtime;
1131         int err;
1132
1133         if (substream == NULL)
1134                 return 0;
1135         runtime = substream->runtime;
1136         if (runtime->oss.params) {
1137                 err = snd_pcm_oss_change_params(substream, false);
1138                 if (err < 0)
1139                         return err;
1140         }
1141         if (runtime->oss.prepare) {
1142                 err = snd_pcm_oss_prepare(substream);
1143                 if (err < 0)
1144                         return err;
1145         }
1146         return 0;
1147 }
1148
1149 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1150 {
1151         struct snd_pcm_runtime *runtime;
1152         snd_pcm_uframes_t frames;
1153         int err = 0;
1154
1155         while (1) {
1156                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1157                 if (err < 0)
1158                         break;
1159                 runtime = substream->runtime;
1160                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1161                         break;
1162                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1163                 /* until avail(delay) <= buffer_size */
1164                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1165                 frames /= runtime->period_size;
1166                 frames *= runtime->period_size;
1167                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1168                 if (err < 0)
1169                         break;
1170         }
1171         return err;
1172 }
1173
1174 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1175 {
1176         struct snd_pcm_runtime *runtime = substream->runtime;
1177         int ret;
1178         while (1) {
1179                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1180                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1181 #ifdef OSS_DEBUG
1182                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1183                                 printk(KERN_DEBUG "pcm_oss: write: "
1184                                        "recovering from XRUN\n");
1185                         else
1186                                 printk(KERN_DEBUG "pcm_oss: write: "
1187                                        "recovering from SUSPEND\n");
1188 #endif
1189                         ret = snd_pcm_oss_prepare(substream);
1190                         if (ret < 0)
1191                                 break;
1192                 }
1193                 if (in_kernel) {
1194                         mm_segment_t fs;
1195                         fs = snd_enter_user();
1196                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1197                         snd_leave_user(fs);
1198                 } else {
1199                         ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1200                 }
1201                 if (ret != -EPIPE && ret != -ESTRPIPE)
1202                         break;
1203                 /* test, if we can't store new data, because the stream */
1204                 /* has not been started */
1205                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1206                         return -EAGAIN;
1207         }
1208         return ret;
1209 }
1210
1211 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1212 {
1213         struct snd_pcm_runtime *runtime = substream->runtime;
1214         snd_pcm_sframes_t delay;
1215         int ret;
1216         while (1) {
1217                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1218                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1219 #ifdef OSS_DEBUG
1220                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1221                                 printk(KERN_DEBUG "pcm_oss: read: "
1222                                        "recovering from XRUN\n");
1223                         else
1224                                 printk(KERN_DEBUG "pcm_oss: read: "
1225                                        "recovering from SUSPEND\n");
1226 #endif
1227                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1228                         if (ret < 0)
1229                                 break;
1230                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1231                         ret = snd_pcm_oss_prepare(substream);
1232                         if (ret < 0)
1233                                 break;
1234                 }
1235                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1236                 if (ret < 0)
1237                         break;
1238                 if (in_kernel) {
1239                         mm_segment_t fs;
1240                         fs = snd_enter_user();
1241                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1242                         snd_leave_user(fs);
1243                 } else {
1244                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1245                 }
1246                 if (ret == -EPIPE) {
1247                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1248                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1249                                 if (ret < 0)
1250                                         break;
1251                         }
1252                         continue;
1253                 }
1254                 if (ret != -ESTRPIPE)
1255                         break;
1256         }
1257         return ret;
1258 }
1259
1260 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1261 {
1262         struct snd_pcm_runtime *runtime = substream->runtime;
1263         int ret;
1264         while (1) {
1265                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1266                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1267 #ifdef OSS_DEBUG
1268                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1269                                 printk(KERN_DEBUG "pcm_oss: writev: "
1270                                        "recovering from XRUN\n");
1271                         else
1272                                 printk(KERN_DEBUG "pcm_oss: writev: "
1273                                        "recovering from SUSPEND\n");
1274 #endif
1275                         ret = snd_pcm_oss_prepare(substream);
1276                         if (ret < 0)
1277                                 break;
1278                 }
1279                 if (in_kernel) {
1280                         mm_segment_t fs;
1281                         fs = snd_enter_user();
1282                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1283                         snd_leave_user(fs);
1284                 } else {
1285                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1286                 }
1287                 if (ret != -EPIPE && ret != -ESTRPIPE)
1288                         break;
1289
1290                 /* test, if we can't store new data, because the stream */
1291                 /* has not been started */
1292                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1293                         return -EAGAIN;
1294         }
1295         return ret;
1296 }
1297
1298 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1299 {
1300         struct snd_pcm_runtime *runtime = substream->runtime;
1301         int ret;
1302         while (1) {
1303                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1304                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1305 #ifdef OSS_DEBUG
1306                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1307                                 printk(KERN_DEBUG "pcm_oss: readv: "
1308                                        "recovering from XRUN\n");
1309                         else
1310                                 printk(KERN_DEBUG "pcm_oss: readv: "
1311                                        "recovering from SUSPEND\n");
1312 #endif
1313                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1314                         if (ret < 0)
1315                                 break;
1316                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1317                         ret = snd_pcm_oss_prepare(substream);
1318                         if (ret < 0)
1319                                 break;
1320                 }
1321                 if (in_kernel) {
1322                         mm_segment_t fs;
1323                         fs = snd_enter_user();
1324                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1325                         snd_leave_user(fs);
1326                 } else {
1327                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1328                 }
1329                 if (ret != -EPIPE && ret != -ESTRPIPE)
1330                         break;
1331         }
1332         return ret;
1333 }
1334
1335 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1336 {
1337         struct snd_pcm_runtime *runtime = substream->runtime;
1338         snd_pcm_sframes_t frames, frames1;
1339 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1340         if (runtime->oss.plugin_first) {
1341                 struct snd_pcm_plugin_channel *channels;
1342                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1343                 if (!in_kernel) {
1344                         if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1345                                 return -EFAULT;
1346                         buf = runtime->oss.buffer;
1347                 }
1348                 frames = bytes / oss_frame_bytes;
1349                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1350                 if (frames1 < 0)
1351                         return frames1;
1352                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1353                 if (frames1 <= 0)
1354                         return frames1;
1355                 bytes = frames1 * oss_frame_bytes;
1356         } else
1357 #endif
1358         {
1359                 frames = bytes_to_frames(runtime, bytes);
1360                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1361                 if (frames1 <= 0)
1362                         return frames1;
1363                 bytes = frames_to_bytes(runtime, frames1);
1364         }
1365         return bytes;
1366 }
1367
1368 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1369 {
1370         size_t xfer = 0;
1371         ssize_t tmp;
1372         struct snd_pcm_runtime *runtime = substream->runtime;
1373
1374         if (atomic_read(&substream->mmap_count))
1375                 return -ENXIO;
1376
1377         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1378                 return tmp;
1379         mutex_lock(&runtime->oss.params_lock);
1380         while (bytes > 0) {
1381                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1382                         tmp = bytes;
1383                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1384                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1385                         if (tmp > 0) {
1386                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1387                                         tmp = -EFAULT;
1388                                         goto err;
1389                                 }
1390                         }
1391                         runtime->oss.buffer_used += tmp;
1392                         buf += tmp;
1393                         bytes -= tmp;
1394                         xfer += tmp;
1395                         if (substream->oss.setup.partialfrag ||
1396                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1397                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1398                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1399                                 if (tmp <= 0)
1400                                         goto err;
1401                                 runtime->oss.bytes += tmp;
1402                                 runtime->oss.period_ptr += tmp;
1403                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1404                                 if (runtime->oss.period_ptr == 0 ||
1405                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1406                                         runtime->oss.buffer_used = 0;
1407                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1408                                         tmp = -EAGAIN;
1409                                         goto err;
1410                                 }
1411                         }
1412                 } else {
1413                         tmp = snd_pcm_oss_write2(substream,
1414                                                  (const char __force *)buf,
1415                                                  runtime->oss.period_bytes, 0);
1416                         if (tmp <= 0)
1417                                 goto err;
1418                         runtime->oss.bytes += tmp;
1419                         buf += tmp;
1420                         bytes -= tmp;
1421                         xfer += tmp;
1422                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1423                             tmp != runtime->oss.period_bytes)
1424                                 break;
1425                 }
1426         }
1427         mutex_unlock(&runtime->oss.params_lock);
1428         return xfer;
1429
1430  err:
1431         mutex_unlock(&runtime->oss.params_lock);
1432         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1433 }
1434
1435 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1436 {
1437         struct snd_pcm_runtime *runtime = substream->runtime;
1438         snd_pcm_sframes_t frames, frames1;
1439 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1440         char __user *final_dst = (char __force __user *)buf;
1441         if (runtime->oss.plugin_first) {
1442                 struct snd_pcm_plugin_channel *channels;
1443                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1444                 if (!in_kernel)
1445                         buf = runtime->oss.buffer;
1446                 frames = bytes / oss_frame_bytes;
1447                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1448                 if (frames1 < 0)
1449                         return frames1;
1450                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1451                 if (frames1 <= 0)
1452                         return frames1;
1453                 bytes = frames1 * oss_frame_bytes;
1454                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1455                         return -EFAULT;
1456         } else
1457 #endif
1458         {
1459                 frames = bytes_to_frames(runtime, bytes);
1460                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1461                 if (frames1 <= 0)
1462                         return frames1;
1463                 bytes = frames_to_bytes(runtime, frames1);
1464         }
1465         return bytes;
1466 }
1467
1468 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1469 {
1470         size_t xfer = 0;
1471         ssize_t tmp;
1472         struct snd_pcm_runtime *runtime = substream->runtime;
1473
1474         if (atomic_read(&substream->mmap_count))
1475                 return -ENXIO;
1476
1477         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1478                 return tmp;
1479         mutex_lock(&runtime->oss.params_lock);
1480         while (bytes > 0) {
1481                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1482                         if (runtime->oss.buffer_used == 0) {
1483                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1484                                 if (tmp <= 0)
1485                                         goto err;
1486                                 runtime->oss.bytes += tmp;
1487                                 runtime->oss.period_ptr = tmp;
1488                                 runtime->oss.buffer_used = tmp;
1489                         }
1490                         tmp = bytes;
1491                         if ((size_t) tmp > runtime->oss.buffer_used)
1492                                 tmp = runtime->oss.buffer_used;
1493                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1494                                 tmp = -EFAULT;
1495                                 goto err;
1496                         }
1497                         buf += tmp;
1498                         bytes -= tmp;
1499                         xfer += tmp;
1500                         runtime->oss.buffer_used -= tmp;
1501                 } else {
1502                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1503                                                 runtime->oss.period_bytes, 0);
1504                         if (tmp <= 0)
1505                                 goto err;
1506                         runtime->oss.bytes += tmp;
1507                         buf += tmp;
1508                         bytes -= tmp;
1509                         xfer += tmp;
1510                 }
1511         }
1512         mutex_unlock(&runtime->oss.params_lock);
1513         return xfer;
1514
1515  err:
1516         mutex_unlock(&runtime->oss.params_lock);
1517         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1518 }
1519
1520 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1521 {
1522         struct snd_pcm_substream *substream;
1523         struct snd_pcm_runtime *runtime;
1524         int i;
1525
1526         for (i = 0; i < 2; i++) {
1527                 substream = pcm_oss_file->streams[i];
1528                 if (!substream)
1529                         continue;
1530                 runtime = substream->runtime;
1531                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1532                 runtime->oss.prepare = 1;
1533                 runtime->oss.buffer_used = 0;
1534                 runtime->oss.prev_hw_ptr_period = 0;
1535                 runtime->oss.period_ptr = 0;
1536         }
1537         return 0;
1538 }
1539
1540 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1541 {
1542         struct snd_pcm_substream *substream;
1543         int err;
1544
1545         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1546         if (substream != NULL) {
1547                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1548                         return err;
1549                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1550         }
1551         /* note: all errors from the start action are ignored */
1552         /* OSS apps do not know, how to handle them */
1553         return 0;
1554 }
1555
1556 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1557 {
1558         struct snd_pcm_runtime *runtime;
1559         ssize_t result = 0;
1560         snd_pcm_state_t state;
1561         long res;
1562         wait_queue_t wait;
1563
1564         runtime = substream->runtime;
1565         init_waitqueue_entry(&wait, current);
1566         add_wait_queue(&runtime->sleep, &wait);
1567 #ifdef OSS_DEBUG
1568         printk(KERN_DEBUG "sync1: size = %li\n", size);
1569 #endif
1570         while (1) {
1571                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1572                 if (result > 0) {
1573                         runtime->oss.buffer_used = 0;
1574                         result = 0;
1575                         break;
1576                 }
1577                 if (result != 0 && result != -EAGAIN)
1578                         break;
1579                 result = 0;
1580                 set_current_state(TASK_INTERRUPTIBLE);
1581                 snd_pcm_stream_lock_irq(substream);
1582                 state = runtime->status->state;
1583                 snd_pcm_stream_unlock_irq(substream);
1584                 if (state != SNDRV_PCM_STATE_RUNNING) {
1585                         set_current_state(TASK_RUNNING);
1586                         break;
1587                 }
1588                 res = schedule_timeout(10 * HZ);
1589                 if (signal_pending(current)) {
1590                         result = -ERESTARTSYS;
1591                         break;
1592                 }
1593                 if (res == 0) {
1594                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1595                         result = -EIO;
1596                         break;
1597                 }
1598         }
1599         remove_wait_queue(&runtime->sleep, &wait);
1600         return result;
1601 }
1602
1603 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1604 {
1605         int err = 0;
1606         unsigned int saved_f_flags;
1607         struct snd_pcm_substream *substream;
1608         struct snd_pcm_runtime *runtime;
1609         snd_pcm_format_t format;
1610         unsigned long width;
1611         size_t size;
1612
1613         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1614         if (substream != NULL) {
1615                 runtime = substream->runtime;
1616                 if (atomic_read(&substream->mmap_count))
1617                         goto __direct;
1618                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1619                         return err;
1620                 format = snd_pcm_oss_format_from(runtime->oss.format);
1621                 width = snd_pcm_format_physical_width(format);
1622                 mutex_lock(&runtime->oss.params_lock);
1623                 if (runtime->oss.buffer_used > 0) {
1624 #ifdef OSS_DEBUG
1625                         printk(KERN_DEBUG "sync: buffer_used\n");
1626 #endif
1627                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1628                         snd_pcm_format_set_silence(format,
1629                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1630                                                    size);
1631                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1632                         if (err < 0) {
1633                                 mutex_unlock(&runtime->oss.params_lock);
1634                                 return err;
1635                         }
1636                 } else if (runtime->oss.period_ptr > 0) {
1637 #ifdef OSS_DEBUG
1638                         printk(KERN_DEBUG "sync: period_ptr\n");
1639 #endif
1640                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1641                         snd_pcm_format_set_silence(format,
1642                                                    runtime->oss.buffer,
1643                                                    size * 8 / width);
1644                         err = snd_pcm_oss_sync1(substream, size);
1645                         if (err < 0) {
1646                                 mutex_unlock(&runtime->oss.params_lock);
1647                                 return err;
1648                         }
1649                 }
1650                 /*
1651                  * The ALSA's period might be a bit large than OSS one.
1652                  * Fill the remain portion of ALSA period with zeros.
1653                  */
1654                 size = runtime->control->appl_ptr % runtime->period_size;
1655                 if (size > 0) {
1656                         size = runtime->period_size - size;
1657                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1658                                 size = (runtime->frame_bits * size) / 8;
1659                                 while (size > 0) {
1660                                         mm_segment_t fs;
1661                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1662                                         size -= size1;
1663                                         size1 *= 8;
1664                                         size1 /= runtime->sample_bits;
1665                                         snd_pcm_format_set_silence(runtime->format,
1666                                                                    runtime->oss.buffer,
1667                                                                    size1);
1668                                         size1 /= runtime->channels; /* frames */
1669                                         fs = snd_enter_user();
1670                                         snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1671                                         snd_leave_user(fs);
1672                                 }
1673                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1674                                 void __user *buffers[runtime->channels];
1675                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1676                                 snd_pcm_lib_writev(substream, buffers, size);
1677                         }
1678                 }
1679                 mutex_unlock(&runtime->oss.params_lock);
1680                 /*
1681                  * finish sync: drain the buffer
1682                  */
1683               __direct:
1684                 saved_f_flags = substream->f_flags;
1685                 substream->f_flags &= ~O_NONBLOCK;
1686                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1687                 substream->f_flags = saved_f_flags;
1688                 if (err < 0)
1689                         return err;
1690                 runtime->oss.prepare = 1;
1691         }
1692
1693         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1694         if (substream != NULL) {
1695                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1696                         return err;
1697                 runtime = substream->runtime;
1698                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1699                 if (err < 0)
1700                         return err;
1701                 runtime->oss.buffer_used = 0;
1702                 runtime->oss.prepare = 1;
1703         }
1704         return 0;
1705 }
1706
1707 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1708 {
1709         int idx;
1710
1711         for (idx = 1; idx >= 0; --idx) {
1712                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1713                 struct snd_pcm_runtime *runtime;
1714                 if (substream == NULL)
1715                         continue;
1716                 runtime = substream->runtime;
1717                 if (rate < 1000)
1718                         rate = 1000;
1719                 else if (rate > 192000)
1720                         rate = 192000;
1721                 if (runtime->oss.rate != rate) {
1722                         runtime->oss.params = 1;
1723                         runtime->oss.rate = rate;
1724                 }
1725         }
1726         return snd_pcm_oss_get_rate(pcm_oss_file);
1727 }
1728
1729 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1730 {
1731         struct snd_pcm_substream *substream;
1732         int err;
1733
1734         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1735                 return err;
1736         return substream->runtime->oss.rate;
1737 }
1738
1739 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1740 {
1741         int idx;
1742         if (channels < 1)
1743                 channels = 1;
1744         if (channels > 128)
1745                 return -EINVAL;
1746         for (idx = 1; idx >= 0; --idx) {
1747                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1748                 struct snd_pcm_runtime *runtime;
1749                 if (substream == NULL)
1750                         continue;
1751                 runtime = substream->runtime;
1752                 if (runtime->oss.channels != channels) {
1753                         runtime->oss.params = 1;
1754                         runtime->oss.channels = channels;
1755                 }
1756         }
1757         return snd_pcm_oss_get_channels(pcm_oss_file);
1758 }
1759
1760 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1761 {
1762         struct snd_pcm_substream *substream;
1763         int err;
1764
1765         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1766                 return err;
1767         return substream->runtime->oss.channels;
1768 }
1769
1770 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1771 {
1772         struct snd_pcm_substream *substream;
1773         int err;
1774
1775         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1776                 return err;
1777         return substream->runtime->oss.period_bytes;
1778 }
1779
1780 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1781 {
1782         struct snd_pcm_substream *substream;
1783         int err;
1784         int direct;
1785         struct snd_pcm_hw_params *params;
1786         unsigned int formats = 0;
1787         struct snd_mask format_mask;
1788         int fmt;
1789
1790         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1791                 return err;
1792         if (atomic_read(&substream->mmap_count))
1793                 direct = 1;
1794         else
1795                 direct = substream->oss.setup.direct;
1796         if (!direct)
1797                 return AFMT_MU_LAW | AFMT_U8 |
1798                        AFMT_S16_LE | AFMT_S16_BE |
1799                        AFMT_S8 | AFMT_U16_LE |
1800                        AFMT_U16_BE |
1801                         AFMT_S32_LE | AFMT_S32_BE |
1802                         AFMT_S24_LE | AFMT_S24_BE |
1803                         AFMT_S24_PACKED;
1804         params = kmalloc(sizeof(*params), GFP_KERNEL);
1805         if (!params)
1806                 return -ENOMEM;
1807         _snd_pcm_hw_params_any(params);
1808         err = snd_pcm_hw_refine(substream, params);
1809         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1810         kfree(params);
1811         if (err < 0)
1812                 return err;
1813         for (fmt = 0; fmt < 32; ++fmt) {
1814                 if (snd_mask_test(&format_mask, fmt)) {
1815                         int f = snd_pcm_oss_format_to(fmt);
1816                         if (f >= 0)
1817                                 formats |= f;
1818                 }
1819         }
1820         return formats;
1821 }
1822
1823 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1824 {
1825         int formats, idx;
1826
1827         if (format != AFMT_QUERY) {
1828                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1829                 if (formats < 0)
1830                         return formats;
1831                 if (!(formats & format))
1832                         format = AFMT_U8;
1833                 for (idx = 1; idx >= 0; --idx) {
1834                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1835                         struct snd_pcm_runtime *runtime;
1836                         if (substream == NULL)
1837                                 continue;
1838                         runtime = substream->runtime;
1839                         if (runtime->oss.format != format) {
1840                                 runtime->oss.params = 1;
1841                                 runtime->oss.format = format;
1842                         }
1843                 }
1844         }
1845         return snd_pcm_oss_get_format(pcm_oss_file);
1846 }
1847
1848 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1849 {
1850         struct snd_pcm_substream *substream;
1851         int err;
1852
1853         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1854                 return err;
1855         return substream->runtime->oss.format;
1856 }
1857
1858 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1859 {
1860         struct snd_pcm_runtime *runtime;
1861
1862         if (substream == NULL)
1863                 return 0;
1864         runtime = substream->runtime;
1865         if (subdivide == 0) {
1866                 subdivide = runtime->oss.subdivision;
1867                 if (subdivide == 0)
1868                         subdivide = 1;
1869                 return subdivide;
1870         }
1871         if (runtime->oss.subdivision || runtime->oss.fragshift)
1872                 return -EINVAL;
1873         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1874             subdivide != 8 && subdivide != 16)
1875                 return -EINVAL;
1876         runtime->oss.subdivision = subdivide;
1877         runtime->oss.params = 1;
1878         return subdivide;
1879 }
1880
1881 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1882 {
1883         int err = -EINVAL, idx;
1884
1885         for (idx = 1; idx >= 0; --idx) {
1886                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1887                 if (substream == NULL)
1888                         continue;
1889                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1890                         return err;
1891         }
1892         return err;
1893 }
1894
1895 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1896 {
1897         struct snd_pcm_runtime *runtime;
1898
1899         if (substream == NULL)
1900                 return 0;
1901         runtime = substream->runtime;
1902         if (runtime->oss.subdivision || runtime->oss.fragshift)
1903                 return -EINVAL;
1904         runtime->oss.fragshift = val & 0xffff;
1905         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1906         if (runtime->oss.fragshift < 4)         /* < 16 */
1907                 runtime->oss.fragshift = 4;
1908         if (runtime->oss.maxfrags < 2)
1909                 runtime->oss.maxfrags = 2;
1910         runtime->oss.params = 1;
1911         return 0;
1912 }
1913
1914 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1915 {
1916         int err = -EINVAL, idx;
1917
1918         for (idx = 1; idx >= 0; --idx) {
1919                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1920                 if (substream == NULL)
1921                         continue;
1922                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1923                         return err;
1924         }
1925         return err;
1926 }
1927
1928 static int snd_pcm_oss_nonblock(struct file * file)
1929 {
1930         spin_lock(&file->f_lock);
1931         file->f_flags |= O_NONBLOCK;
1932         spin_unlock(&file->f_lock);
1933         return 0;
1934 }
1935
1936 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1937 {
1938
1939         if (substream == NULL) {
1940                 res &= ~DSP_CAP_DUPLEX;
1941                 return res;
1942         }
1943 #ifdef DSP_CAP_MULTI
1944         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1945                 if (substream->pstr->substream_count > 1)
1946                         res |= DSP_CAP_MULTI;
1947 #endif
1948         /* DSP_CAP_REALTIME is set all times: */
1949         /* all ALSA drivers can return actual pointer in ring buffer */
1950 #if defined(DSP_CAP_REALTIME) && 0
1951         {
1952                 struct snd_pcm_runtime *runtime = substream->runtime;
1953                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1954                         res &= ~DSP_CAP_REALTIME;
1955         }
1956 #endif
1957         return res;
1958 }
1959
1960 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1961 {
1962         int result, idx;
1963
1964         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1965         for (idx = 0; idx < 2; idx++) {
1966                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1967                 result = snd_pcm_oss_get_caps1(substream, result);
1968         }
1969         result |= 0x0001;       /* revision - same as SB AWE 64 */
1970         return result;
1971 }
1972
1973 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1974                                       snd_pcm_uframes_t hw_ptr)
1975 {
1976         struct snd_pcm_runtime *runtime = substream->runtime;
1977         snd_pcm_uframes_t appl_ptr;
1978         appl_ptr = hw_ptr + runtime->buffer_size;
1979         appl_ptr %= runtime->boundary;
1980         runtime->control->appl_ptr = appl_ptr;
1981 }
1982
1983 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1984 {
1985         struct snd_pcm_runtime *runtime;
1986         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1987         int err, cmd;
1988
1989 #ifdef OSS_DEBUG
1990         printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1991 #endif
1992
1993         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1994         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1995
1996         if (psubstream) {
1997                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1998                         return err;
1999         }
2000         if (csubstream) {
2001                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2002                         return err;
2003         }
2004         if (psubstream) {
2005                 runtime = psubstream->runtime;
2006                 if (trigger & PCM_ENABLE_OUTPUT) {
2007                         if (runtime->oss.trigger)
2008                                 goto _skip1;
2009                         if (atomic_read(&psubstream->mmap_count))
2010                                 snd_pcm_oss_simulate_fill(psubstream,
2011                                                 get_hw_ptr_period(runtime));
2012                         runtime->oss.trigger = 1;
2013                         runtime->start_threshold = 1;
2014                         cmd = SNDRV_PCM_IOCTL_START;
2015                 } else {
2016                         if (!runtime->oss.trigger)
2017                                 goto _skip1;
2018                         runtime->oss.trigger = 0;
2019                         runtime->start_threshold = runtime->boundary;
2020                         cmd = SNDRV_PCM_IOCTL_DROP;
2021                         runtime->oss.prepare = 1;
2022                 }
2023                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2024                 if (err < 0)
2025                         return err;
2026         }
2027  _skip1:
2028         if (csubstream) {
2029                 runtime = csubstream->runtime;
2030                 if (trigger & PCM_ENABLE_INPUT) {
2031                         if (runtime->oss.trigger)
2032                                 goto _skip2;
2033                         runtime->oss.trigger = 1;
2034                         runtime->start_threshold = 1;
2035                         cmd = SNDRV_PCM_IOCTL_START;
2036                 } else {
2037                         if (!runtime->oss.trigger)
2038                                 goto _skip2;
2039                         runtime->oss.trigger = 0;
2040                         runtime->start_threshold = runtime->boundary;
2041                         cmd = SNDRV_PCM_IOCTL_DROP;
2042                         runtime->oss.prepare = 1;
2043                 }
2044                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2045                 if (err < 0)
2046                         return err;
2047         }
2048  _skip2:
2049         return 0;
2050 }
2051
2052 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2053 {
2054         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2055         int result = 0;
2056
2057         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2058         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2059         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2060                 result |= PCM_ENABLE_OUTPUT;
2061         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2062                 result |= PCM_ENABLE_INPUT;
2063         return result;
2064 }
2065
2066 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2067 {
2068         struct snd_pcm_substream *substream;
2069         struct snd_pcm_runtime *runtime;
2070         snd_pcm_sframes_t delay;
2071         int err;
2072
2073         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2074         if (substream == NULL)
2075                 return -EINVAL;
2076         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2077                 return err;
2078         runtime = substream->runtime;
2079         if (runtime->oss.params || runtime->oss.prepare)
2080                 return 0;
2081         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2082         if (err == -EPIPE)
2083                 delay = 0;      /* hack for broken OSS applications */
2084         else if (err < 0)
2085                 return err;
2086         return snd_pcm_oss_bytes(substream, delay);
2087 }
2088
2089 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2090 {
2091         struct snd_pcm_substream *substream;
2092         struct snd_pcm_runtime *runtime;
2093         snd_pcm_sframes_t delay;
2094         int fixup;
2095         struct count_info info;
2096         int err;
2097
2098         if (_info == NULL)
2099                 return -EFAULT;
2100         substream = pcm_oss_file->streams[stream];
2101         if (substream == NULL)
2102                 return -EINVAL;
2103         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2104                 return err;
2105         runtime = substream->runtime;
2106         if (runtime->oss.params || runtime->oss.prepare) {
2107                 memset(&info, 0, sizeof(info));
2108                 if (copy_to_user(_info, &info, sizeof(info)))
2109                         return -EFAULT;
2110                 return 0;
2111         }
2112         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2113                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2114                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2115                         err = 0;
2116                         delay = 0;
2117                         fixup = 0;
2118                 } else {
2119                         fixup = runtime->oss.buffer_used;
2120                 }
2121         } else {
2122                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2123                 fixup = -runtime->oss.buffer_used;
2124         }
2125         if (err < 0)
2126                 return err;
2127         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2128         if (atomic_read(&substream->mmap_count)) {
2129                 snd_pcm_sframes_t n;
2130                 delay = get_hw_ptr_period(runtime);
2131                 n = delay - runtime->oss.prev_hw_ptr_period;
2132                 if (n < 0)
2133                         n += runtime->boundary;
2134                 info.blocks = n / runtime->period_size;
2135                 runtime->oss.prev_hw_ptr_period = delay;
2136                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2137                         snd_pcm_oss_simulate_fill(substream, delay);
2138                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2139         } else {
2140                 delay = snd_pcm_oss_bytes(substream, delay);
2141                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2142                         if (substream->oss.setup.buggyptr)
2143                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2144                         else
2145                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2146                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2147                 } else {
2148                         delay += fixup;
2149                         info.blocks = delay / runtime->oss.period_bytes;
2150                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2151                 }
2152         }
2153         if (copy_to_user(_info, &info, sizeof(info)))
2154                 return -EFAULT;
2155         return 0;
2156 }
2157
2158 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2159 {
2160         struct snd_pcm_substream *substream;
2161         struct snd_pcm_runtime *runtime;
2162         snd_pcm_sframes_t avail;
2163         int fixup;
2164         struct audio_buf_info info;
2165         int err;
2166
2167         if (_info == NULL)
2168                 return -EFAULT;
2169         substream = pcm_oss_file->streams[stream];
2170         if (substream == NULL)
2171                 return -EINVAL;
2172         runtime = substream->runtime;
2173
2174         if (runtime->oss.params &&
2175             (err = snd_pcm_oss_change_params(substream, false)) < 0)
2176                 return err;
2177
2178         info.fragsize = runtime->oss.period_bytes;
2179         info.fragstotal = runtime->periods;
2180         if (runtime->oss.prepare) {
2181                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2182                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2183                         info.fragments = runtime->oss.periods;
2184                 } else {
2185                         info.bytes = 0;
2186                         info.fragments = 0;
2187                 }
2188         } else {
2189                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2190                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2191                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2192                                 avail = runtime->buffer_size;
2193                                 err = 0;
2194                                 fixup = 0;
2195                         } else {
2196                                 avail = runtime->buffer_size - avail;
2197                                 fixup = -runtime->oss.buffer_used;
2198                         }
2199                 } else {
2200                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2201                         fixup = runtime->oss.buffer_used;
2202                 }
2203                 if (err < 0)
2204                         return err;
2205                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2206                 info.fragments = info.bytes / runtime->oss.period_bytes;
2207         }
2208
2209 #ifdef OSS_DEBUG
2210         printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2211                "fragstotal = %i, fragsize = %i\n",
2212                info.bytes, info.fragments, info.fragstotal, info.fragsize);
2213 #endif
2214         if (copy_to_user(_info, &info, sizeof(info)))
2215                 return -EFAULT;
2216         return 0;
2217 }
2218
2219 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2220 {
2221         // it won't be probably implemented
2222         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2223         return -EINVAL;
2224 }
2225
2226 static const char *strip_task_path(const char *path)
2227 {
2228         const char *ptr, *ptrl = NULL;
2229         for (ptr = path; *ptr; ptr++) {
2230                 if (*ptr == '/')
2231                         ptrl = ptr + 1;
2232         }
2233         return ptrl;
2234 }
2235
2236 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2237                                       const char *task_name,
2238                                       struct snd_pcm_oss_setup *rsetup)
2239 {
2240         struct snd_pcm_oss_setup *setup;
2241
2242         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2243         do {
2244                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2245                      setup = setup->next) {
2246                         if (!strcmp(setup->task_name, task_name))
2247                                 goto out;
2248                 }
2249         } while ((task_name = strip_task_path(task_name)) != NULL);
2250  out:
2251         if (setup)
2252                 *rsetup = *setup;
2253         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2254 }
2255
2256 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2257 {
2258         struct snd_pcm_runtime *runtime;
2259         runtime = substream->runtime;
2260         vfree(runtime->oss.buffer);
2261         runtime->oss.buffer = NULL;
2262 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2263         snd_pcm_oss_plugin_clear(substream);
2264 #endif
2265         substream->oss.oss = 0;
2266 }
2267
2268 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2269                                        struct snd_pcm_oss_setup *setup,
2270                                        int minor)
2271 {
2272         struct snd_pcm_runtime *runtime;
2273
2274         substream->oss.oss = 1;
2275         substream->oss.setup = *setup;
2276         if (setup->nonblock)
2277                 substream->f_flags |= O_NONBLOCK;
2278         else if (setup->block)
2279                 substream->f_flags &= ~O_NONBLOCK;
2280         runtime = substream->runtime;
2281         runtime->oss.params = 1;
2282         runtime->oss.trigger = 1;
2283         runtime->oss.rate = 8000;
2284         mutex_init(&runtime->oss.params_lock);
2285         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2286         case SNDRV_MINOR_OSS_PCM_8:
2287                 runtime->oss.format = AFMT_U8;
2288                 break;
2289         case SNDRV_MINOR_OSS_PCM_16:
2290                 runtime->oss.format = AFMT_S16_LE;
2291                 break;
2292         default:
2293                 runtime->oss.format = AFMT_MU_LAW;
2294         }
2295         runtime->oss.channels = 1;
2296         runtime->oss.fragshift = 0;
2297         runtime->oss.maxfrags = 0;
2298         runtime->oss.subdivision = 0;
2299         substream->pcm_release = snd_pcm_oss_release_substream;
2300 }
2301
2302 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2303 {
2304         int cidx;
2305         if (!pcm_oss_file)
2306                 return 0;
2307         for (cidx = 0; cidx < 2; ++cidx) {
2308                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2309                 if (substream)
2310                         snd_pcm_release_substream(substream);
2311         }
2312         kfree(pcm_oss_file);
2313         return 0;
2314 }
2315
2316 static int snd_pcm_oss_open_file(struct file *file,
2317                                  struct snd_pcm *pcm,
2318                                  struct snd_pcm_oss_file **rpcm_oss_file,
2319                                  int minor,
2320                                  struct snd_pcm_oss_setup *setup)
2321 {
2322         int idx, err;
2323         struct snd_pcm_oss_file *pcm_oss_file;
2324         struct snd_pcm_substream *substream;
2325         fmode_t f_mode = file->f_mode;
2326
2327         if (rpcm_oss_file)
2328                 *rpcm_oss_file = NULL;
2329
2330         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2331         if (pcm_oss_file == NULL)
2332                 return -ENOMEM;
2333
2334         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2335             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2336                 f_mode = FMODE_WRITE;
2337
2338         file->f_flags &= ~O_APPEND;
2339         for (idx = 0; idx < 2; idx++) {
2340                 if (setup[idx].disable)
2341                         continue;
2342                 if (! pcm->streams[idx].substream_count)
2343                         continue; /* no matching substream */
2344                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2345                         if (! (f_mode & FMODE_WRITE))
2346                                 continue;
2347                 } else {
2348                         if (! (f_mode & FMODE_READ))
2349                                 continue;
2350                 }
2351                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2352                 if (err < 0) {
2353                         snd_pcm_oss_release_file(pcm_oss_file);
2354                         return err;
2355                 }
2356
2357                 pcm_oss_file->streams[idx] = substream;
2358                 substream->file = pcm_oss_file;
2359                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2360         }
2361
2362         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2363                 snd_pcm_oss_release_file(pcm_oss_file);
2364                 return -EINVAL;
2365         }
2366
2367         file->private_data = pcm_oss_file;
2368         if (rpcm_oss_file)
2369                 *rpcm_oss_file = pcm_oss_file;
2370         return 0;
2371 }
2372
2373
2374 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2375 {
2376         unsigned int idx;
2377
2378         if (snd_BUG_ON(!task || !name || size < 2))
2379                 return -EINVAL;
2380         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2381                 name[idx] = task->comm[idx];
2382         name[idx] = '\0';
2383         return 0;
2384 }
2385
2386 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2387 {
2388         int err;
2389         char task_name[32];
2390         struct snd_pcm *pcm;
2391         struct snd_pcm_oss_file *pcm_oss_file;
2392         struct snd_pcm_oss_setup setup[2];
2393         int nonblock;
2394         wait_queue_t wait;
2395
2396         err = nonseekable_open(inode, file);
2397         if (err < 0)
2398                 return err;
2399
2400         pcm = snd_lookup_oss_minor_data(iminor(inode),
2401                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2402         if (pcm == NULL) {
2403                 err = -ENODEV;
2404                 goto __error1;
2405         }
2406         err = snd_card_file_add(pcm->card, file);
2407         if (err < 0)
2408                 goto __error1;
2409         if (!try_module_get(pcm->card->module)) {
2410                 err = -EFAULT;
2411                 goto __error2;
2412         }
2413         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2414                 err = -EFAULT;
2415                 goto __error;
2416         }
2417         memset(setup, 0, sizeof(setup));
2418         if (file->f_mode & FMODE_WRITE)
2419                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2420                                            task_name, &setup[0]);
2421         if (file->f_mode & FMODE_READ)
2422                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2423                                            task_name, &setup[1]);
2424
2425         nonblock = !!(file->f_flags & O_NONBLOCK);
2426         if (!nonblock)
2427                 nonblock = nonblock_open;
2428
2429         init_waitqueue_entry(&wait, current);
2430         add_wait_queue(&pcm->open_wait, &wait);
2431         mutex_lock(&pcm->open_mutex);
2432         while (1) {
2433                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2434                                             iminor(inode), setup);
2435                 if (err >= 0)
2436                         break;
2437                 if (err == -EAGAIN) {
2438                         if (nonblock) {
2439                                 err = -EBUSY;
2440                                 break;
2441                         }
2442                 } else
2443                         break;
2444                 set_current_state(TASK_INTERRUPTIBLE);
2445                 mutex_unlock(&pcm->open_mutex);
2446                 schedule();
2447                 mutex_lock(&pcm->open_mutex);
2448                 if (pcm->card->shutdown) {
2449                         err = -ENODEV;
2450                         break;
2451                 }
2452                 if (signal_pending(current)) {
2453                         err = -ERESTARTSYS;
2454                         break;
2455                 }
2456         }
2457         remove_wait_queue(&pcm->open_wait, &wait);
2458         mutex_unlock(&pcm->open_mutex);
2459         if (err < 0)
2460                 goto __error;
2461         snd_card_unref(pcm->card);
2462         return err;
2463
2464       __error:
2465         module_put(pcm->card->module);
2466       __error2:
2467         snd_card_file_remove(pcm->card, file);
2468       __error1:
2469         if (pcm)
2470                 snd_card_unref(pcm->card);
2471         return err;
2472 }
2473
2474 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2475 {
2476         struct snd_pcm *pcm;
2477         struct snd_pcm_substream *substream;
2478         struct snd_pcm_oss_file *pcm_oss_file;
2479
2480         pcm_oss_file = file->private_data;
2481         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2482         if (substream == NULL)
2483                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2484         if (snd_BUG_ON(!substream))
2485                 return -ENXIO;
2486         pcm = substream->pcm;
2487         if (!pcm->card->shutdown)
2488                 snd_pcm_oss_sync(pcm_oss_file);
2489         mutex_lock(&pcm->open_mutex);
2490         snd_pcm_oss_release_file(pcm_oss_file);
2491         mutex_unlock(&pcm->open_mutex);
2492         wake_up(&pcm->open_wait);
2493         module_put(pcm->card->module);
2494         snd_card_file_remove(pcm->card, file);
2495         return 0;
2496 }
2497
2498 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2499 {
2500         struct snd_pcm_oss_file *pcm_oss_file;
2501         int __user *p = (int __user *)arg;
2502         int res;
2503
2504         pcm_oss_file = file->private_data;
2505         if (cmd == OSS_GETVERSION)
2506                 return put_user(SNDRV_OSS_VERSION, p);
2507         if (cmd == OSS_ALSAEMULVER)
2508                 return put_user(1, p);
2509 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2510         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2511                 struct snd_pcm_substream *substream;
2512                 int idx;
2513                 for (idx = 0; idx < 2; ++idx) {
2514                         substream = pcm_oss_file->streams[idx];
2515                         if (substream != NULL)
2516                                 break;
2517                 }
2518                 if (snd_BUG_ON(idx >= 2))
2519                         return -ENXIO;
2520                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2521         }
2522 #endif
2523         if (((cmd >> 8) & 0xff) != 'P')
2524                 return -EINVAL;
2525 #ifdef OSS_DEBUG
2526         printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2527 #endif
2528         switch (cmd) {
2529         case SNDCTL_DSP_RESET:
2530                 return snd_pcm_oss_reset(pcm_oss_file);
2531         case SNDCTL_DSP_SYNC:
2532                 return snd_pcm_oss_sync(pcm_oss_file);
2533         case SNDCTL_DSP_SPEED:
2534                 if (get_user(res, p))
2535                         return -EFAULT;
2536                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2537                         return res;
2538                 return put_user(res, p);
2539         case SOUND_PCM_READ_RATE:
2540                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2541                 if (res < 0)
2542                         return res;
2543                 return put_user(res, p);
2544         case SNDCTL_DSP_STEREO:
2545                 if (get_user(res, p))
2546                         return -EFAULT;
2547                 res = res > 0 ? 2 : 1;
2548                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2549                         return res;
2550                 return put_user(--res, p);
2551         case SNDCTL_DSP_GETBLKSIZE:
2552                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2553                 if (res < 0)
2554                         return res;
2555                 return put_user(res, p);
2556         case SNDCTL_DSP_SETFMT:
2557                 if (get_user(res, p))
2558                         return -EFAULT;
2559                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2560                 if (res < 0)
2561                         return res;
2562                 return put_user(res, p);
2563         case SOUND_PCM_READ_BITS:
2564                 res = snd_pcm_oss_get_format(pcm_oss_file);
2565                 if (res < 0)
2566                         return res;
2567                 return put_user(res, p);
2568         case SNDCTL_DSP_CHANNELS:
2569                 if (get_user(res, p))
2570                         return -EFAULT;
2571                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2572                 if (res < 0)
2573                         return res;
2574                 return put_user(res, p);
2575         case SOUND_PCM_READ_CHANNELS:
2576                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2577                 if (res < 0)
2578                         return res;
2579                 return put_user(res, p);
2580         case SOUND_PCM_WRITE_FILTER:
2581         case SOUND_PCM_READ_FILTER:
2582                 return -EIO;
2583         case SNDCTL_DSP_POST:
2584                 return snd_pcm_oss_post(pcm_oss_file);
2585         case SNDCTL_DSP_SUBDIVIDE:
2586                 if (get_user(res, p))
2587                         return -EFAULT;
2588                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2589                 if (res < 0)
2590                         return res;
2591                 return put_user(res, p);
2592         case SNDCTL_DSP_SETFRAGMENT:
2593                 if (get_user(res, p))
2594                         return -EFAULT;
2595                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2596         case SNDCTL_DSP_GETFMTS:
2597                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2598                 if (res < 0)
2599                         return res;
2600                 return put_user(res, p);
2601         case SNDCTL_DSP_GETOSPACE:
2602         case SNDCTL_DSP_GETISPACE:
2603                 return snd_pcm_oss_get_space(pcm_oss_file,
2604                         cmd == SNDCTL_DSP_GETISPACE ?
2605                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2606                         (struct audio_buf_info __user *) arg);
2607         case SNDCTL_DSP_NONBLOCK:
2608                 return snd_pcm_oss_nonblock(file);
2609         case SNDCTL_DSP_GETCAPS:
2610                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2611                 if (res < 0)
2612                         return res;
2613                 return put_user(res, p);
2614         case SNDCTL_DSP_GETTRIGGER:
2615                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2616                 if (res < 0)
2617                         return res;
2618                 return put_user(res, p);
2619         case SNDCTL_DSP_SETTRIGGER:
2620                 if (get_user(res, p))
2621                         return -EFAULT;
2622                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2623         case SNDCTL_DSP_GETIPTR:
2624         case SNDCTL_DSP_GETOPTR:
2625                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2626                         cmd == SNDCTL_DSP_GETIPTR ?
2627                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2628                         (struct count_info __user *) arg);
2629         case SNDCTL_DSP_MAPINBUF:
2630         case SNDCTL_DSP_MAPOUTBUF:
2631                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2632                         cmd == SNDCTL_DSP_MAPINBUF ?
2633                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2634                         (struct buffmem_desc __user *) arg);
2635         case SNDCTL_DSP_SETSYNCRO:
2636                 /* stop DMA now.. */
2637                 return 0;
2638         case SNDCTL_DSP_SETDUPLEX:
2639                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2640                         return 0;
2641                 return -EIO;
2642         case SNDCTL_DSP_GETODELAY:
2643                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2644                 if (res < 0) {
2645                         /* it's for sure, some broken apps don't check for error codes */
2646                         put_user(0, p);
2647                         return res;
2648                 }
2649                 return put_user(res, p);
2650         case SNDCTL_DSP_PROFILE:
2651                 return 0;       /* silently ignore */
2652         default:
2653                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2654         }
2655         return -EINVAL;
2656 }
2657
2658 #ifdef CONFIG_COMPAT
2659 /* all compatible */
2660 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2661 #else
2662 #define snd_pcm_oss_ioctl_compat        NULL
2663 #endif
2664
2665 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2666 {
2667         struct snd_pcm_oss_file *pcm_oss_file;
2668         struct snd_pcm_substream *substream;
2669
2670         pcm_oss_file = file->private_data;
2671         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2672         if (substream == NULL)
2673                 return -ENXIO;
2674         substream->f_flags = file->f_flags & O_NONBLOCK;
2675 #ifndef OSS_DEBUG
2676         return snd_pcm_oss_read1(substream, buf, count);
2677 #else
2678         {
2679                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2680                 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2681                        "(returned %li bytes)\n", (long)count, (long)res);
2682                 return res;
2683         }
2684 #endif
2685 }
2686
2687 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2688 {
2689         struct snd_pcm_oss_file *pcm_oss_file;
2690         struct snd_pcm_substream *substream;
2691         long result;
2692
2693         pcm_oss_file = file->private_data;
2694         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2695         if (substream == NULL)
2696                 return -ENXIO;
2697         substream->f_flags = file->f_flags & O_NONBLOCK;
2698         result = snd_pcm_oss_write1(substream, buf, count);
2699 #ifdef OSS_DEBUG
2700         printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2701                (long)count, (long)result);
2702 #endif
2703         return result;
2704 }
2705
2706 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2707 {
2708         struct snd_pcm_runtime *runtime = substream->runtime;
2709         if (atomic_read(&substream->mmap_count))
2710                 return runtime->oss.prev_hw_ptr_period !=
2711                                                 get_hw_ptr_period(runtime);
2712         else
2713                 return snd_pcm_playback_avail(runtime) >=
2714                                                 runtime->oss.period_frames;
2715 }
2716
2717 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2718 {
2719         struct snd_pcm_runtime *runtime = substream->runtime;
2720         if (atomic_read(&substream->mmap_count))
2721                 return runtime->oss.prev_hw_ptr_period !=
2722                                                 get_hw_ptr_period(runtime);
2723         else
2724                 return snd_pcm_capture_avail(runtime) >=
2725                                                 runtime->oss.period_frames;
2726 }
2727
2728 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2729 {
2730         struct snd_pcm_oss_file *pcm_oss_file;
2731         unsigned int mask;
2732         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2733
2734         pcm_oss_file = file->private_data;
2735
2736         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2737         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2738
2739         mask = 0;
2740         if (psubstream != NULL) {
2741                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2742                 poll_wait(file, &runtime->sleep, wait);
2743                 snd_pcm_stream_lock_irq(psubstream);
2744                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2745                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2746                      snd_pcm_oss_playback_ready(psubstream)))
2747                         mask |= POLLOUT | POLLWRNORM;
2748                 snd_pcm_stream_unlock_irq(psubstream);
2749         }
2750         if (csubstream != NULL) {
2751                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2752                 snd_pcm_state_t ostate;
2753                 poll_wait(file, &runtime->sleep, wait);
2754                 snd_pcm_stream_lock_irq(csubstream);
2755                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2756                     snd_pcm_oss_capture_ready(csubstream))
2757                         mask |= POLLIN | POLLRDNORM;
2758                 snd_pcm_stream_unlock_irq(csubstream);
2759                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2760                         struct snd_pcm_oss_file ofile;
2761                         memset(&ofile, 0, sizeof(ofile));
2762                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2763                         runtime->oss.trigger = 0;
2764                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2765                 }
2766         }
2767
2768         return mask;
2769 }
2770
2771 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2772 {
2773         struct snd_pcm_oss_file *pcm_oss_file;
2774         struct snd_pcm_substream *substream = NULL;
2775         struct snd_pcm_runtime *runtime;
2776         int err;
2777
2778 #ifdef OSS_DEBUG
2779         printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2780 #endif
2781         pcm_oss_file = file->private_data;
2782         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2783         case VM_READ | VM_WRITE:
2784                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2785                 if (substream)
2786                         break;
2787                 /* Fall through */
2788         case VM_READ:
2789                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2790                 break;
2791         case VM_WRITE:
2792                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2793                 break;
2794         default:
2795                 return -EINVAL;
2796         }
2797         /* set VM_READ access as well to fix memset() routines that do
2798            reads before writes (to improve performance) */
2799         area->vm_flags |= VM_READ;
2800         if (substream == NULL)
2801                 return -ENXIO;
2802         runtime = substream->runtime;
2803         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2804                 return -EIO;
2805         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2806                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2807         else
2808                 return -EIO;
2809
2810         if (runtime->oss.params) {
2811                 /* use mutex_trylock() for params_lock for avoiding a deadlock
2812                  * between mmap_sem and params_lock taken by
2813                  * copy_from/to_user() in snd_pcm_oss_write/read()
2814                  */
2815                 err = snd_pcm_oss_change_params(substream, true);
2816                 if (err < 0)
2817                         return err;
2818         }
2819 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2820         if (runtime->oss.plugin_first != NULL)
2821                 return -EIO;
2822 #endif
2823
2824         if (area->vm_pgoff != 0)
2825                 return -EINVAL;
2826
2827         err = snd_pcm_mmap_data(substream, file, area);
2828         if (err < 0)
2829                 return err;
2830         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2831         runtime->silence_threshold = 0;
2832         runtime->silence_size = 0;
2833 #ifdef OSS_DEBUG
2834         printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2835                runtime->oss.mmap_bytes);
2836 #endif
2837         /* In mmap mode we never stop */
2838         runtime->stop_threshold = runtime->boundary;
2839
2840         return 0;
2841 }
2842
2843 #ifdef CONFIG_SND_VERBOSE_PROCFS
2844 /*
2845  *  /proc interface
2846  */
2847
2848 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2849                                   struct snd_info_buffer *buffer)
2850 {
2851         struct snd_pcm_str *pstr = entry->private_data;
2852         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2853         mutex_lock(&pstr->oss.setup_mutex);
2854         while (setup) {
2855                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2856                             setup->task_name,
2857                             setup->periods,
2858                             setup->period_size,
2859                             setup->disable ? " disable" : "",
2860                             setup->direct ? " direct" : "",
2861                             setup->block ? " block" : "",
2862                             setup->nonblock ? " non-block" : "",
2863                             setup->partialfrag ? " partial-frag" : "",
2864                             setup->nosilence ? " no-silence" : "");
2865                 setup = setup->next;
2866         }
2867         mutex_unlock(&pstr->oss.setup_mutex);
2868 }
2869
2870 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2871 {
2872         struct snd_pcm_oss_setup *setup, *setupn;
2873
2874         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2875              setup; setup = setupn) {
2876                 setupn = setup->next;
2877                 kfree(setup->task_name);
2878                 kfree(setup);
2879         }
2880         pstr->oss.setup_list = NULL;
2881 }
2882
2883 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2884                                    struct snd_info_buffer *buffer)
2885 {
2886         struct snd_pcm_str *pstr = entry->private_data;
2887         char line[128], str[32], task_name[32];
2888         const char *ptr;
2889         int idx1;
2890         struct snd_pcm_oss_setup *setup, *setup1, template;
2891
2892         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2893                 mutex_lock(&pstr->oss.setup_mutex);
2894                 memset(&template, 0, sizeof(template));
2895                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2896                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2897                         snd_pcm_oss_proc_free_setup_list(pstr);
2898                         mutex_unlock(&pstr->oss.setup_mutex);
2899                         continue;
2900                 }
2901                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2902                         if (!strcmp(setup->task_name, task_name)) {
2903                                 template = *setup;
2904                                 break;
2905                         }
2906                 }
2907                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2908                 template.periods = simple_strtoul(str, NULL, 10);
2909                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2910                 template.period_size = simple_strtoul(str, NULL, 10);
2911                 for (idx1 = 31; idx1 >= 0; idx1--)
2912                         if (template.period_size & (1 << idx1))
2913                                 break;
2914                 for (idx1--; idx1 >= 0; idx1--)
2915                         template.period_size &= ~(1 << idx1);
2916                 do {
2917                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2918                         if (!strcmp(str, "disable")) {
2919                                 template.disable = 1;
2920                         } else if (!strcmp(str, "direct")) {
2921                                 template.direct = 1;
2922                         } else if (!strcmp(str, "block")) {
2923                                 template.block = 1;
2924                         } else if (!strcmp(str, "non-block")) {
2925                                 template.nonblock = 1;
2926                         } else if (!strcmp(str, "partial-frag")) {
2927                                 template.partialfrag = 1;
2928                         } else if (!strcmp(str, "no-silence")) {
2929                                 template.nosilence = 1;
2930                         } else if (!strcmp(str, "buggy-ptr")) {
2931                                 template.buggyptr = 1;
2932                         }
2933                 } while (*str);
2934                 if (setup == NULL) {
2935                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2936                         if (! setup) {
2937                                 buffer->error = -ENOMEM;
2938                                 mutex_unlock(&pstr->oss.setup_mutex);
2939                                 return;
2940                         }
2941                         if (pstr->oss.setup_list == NULL)
2942                                 pstr->oss.setup_list = setup;
2943                         else {
2944                                 for (setup1 = pstr->oss.setup_list;
2945                                      setup1->next; setup1 = setup1->next);
2946                                 setup1->next = setup;
2947                         }
2948                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2949                         if (! template.task_name) {
2950                                 kfree(setup);
2951                                 buffer->error = -ENOMEM;
2952                                 mutex_unlock(&pstr->oss.setup_mutex);
2953                                 return;
2954                         }
2955                 }
2956                 *setup = template;
2957                 mutex_unlock(&pstr->oss.setup_mutex);
2958         }
2959 }
2960
2961 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2962 {
2963         int stream;
2964         for (stream = 0; stream < 2; ++stream) {
2965                 struct snd_info_entry *entry;
2966                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2967                 if (pstr->substream_count == 0)
2968                         continue;
2969                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2970                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2971                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2972                         entry->c.text.read = snd_pcm_oss_proc_read;
2973                         entry->c.text.write = snd_pcm_oss_proc_write;
2974                         entry->private_data = pstr;
2975                         if (snd_info_register(entry) < 0) {
2976                                 snd_info_free_entry(entry);
2977                                 entry = NULL;
2978                         }
2979                 }
2980                 pstr->oss.proc_entry = entry;
2981         }
2982 }
2983
2984 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2985 {
2986         int stream;
2987         for (stream = 0; stream < 2; ++stream) {
2988                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2989                 snd_info_free_entry(pstr->oss.proc_entry);
2990                 pstr->oss.proc_entry = NULL;
2991                 snd_pcm_oss_proc_free_setup_list(pstr);
2992         }
2993 }
2994 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2995 #define snd_pcm_oss_proc_init(pcm)
2996 #define snd_pcm_oss_proc_done(pcm)
2997 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2998
2999 /*
3000  *  ENTRY functions
3001  */
3002
3003 static const struct file_operations snd_pcm_oss_f_reg =
3004 {
3005         .owner =        THIS_MODULE,
3006         .read =         snd_pcm_oss_read,
3007         .write =        snd_pcm_oss_write,
3008         .open =         snd_pcm_oss_open,
3009         .release =      snd_pcm_oss_release,
3010         .llseek =       no_llseek,
3011         .poll =         snd_pcm_oss_poll,
3012         .unlocked_ioctl =       snd_pcm_oss_ioctl,
3013         .compat_ioctl = snd_pcm_oss_ioctl_compat,
3014         .mmap =         snd_pcm_oss_mmap,
3015 };
3016
3017 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3018 {
3019         char name[128];
3020         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3021         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3022                                     pcm->card, index, &snd_pcm_oss_f_reg,
3023                                     pcm, name) < 0) {
3024                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3025                            pcm->card->number, pcm->device);
3026         }
3027 }
3028
3029 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3030 {
3031         pcm->oss.reg = 0;
3032         if (dsp_map[pcm->card->number] == (int)pcm->device) {
3033                 char name[128];
3034                 int duplex;
3035                 register_oss_dsp(pcm, 0);
3036                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3037                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3038                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3039                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3040 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3041                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3042                                       pcm->card->number,
3043                                       name);
3044 #endif
3045                 pcm->oss.reg++;
3046                 pcm->oss.reg_mask |= 1;
3047         }
3048         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3049                 register_oss_dsp(pcm, 1);
3050                 pcm->oss.reg++;
3051                 pcm->oss.reg_mask |= 2;
3052         }
3053
3054         if (pcm->oss.reg)
3055                 snd_pcm_oss_proc_init(pcm);
3056
3057         return 0;
3058 }
3059
3060 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3061 {
3062         if (pcm->oss.reg) {
3063                 if (pcm->oss.reg_mask & 1) {
3064                         pcm->oss.reg_mask &= ~1;
3065                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3066                                                   pcm->card, 0);
3067                 }
3068                 if (pcm->oss.reg_mask & 2) {
3069                         pcm->oss.reg_mask &= ~2;
3070                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3071                                                   pcm->card, 1);
3072                 }
3073                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3074 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3075                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3076 #endif
3077                 }
3078                 pcm->oss.reg = 0;
3079         }
3080         return 0;
3081 }
3082
3083 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3084 {
3085         snd_pcm_oss_disconnect_minor(pcm);
3086         snd_pcm_oss_proc_done(pcm);
3087         return 0;
3088 }
3089
3090 static struct snd_pcm_notify snd_pcm_oss_notify =
3091 {
3092         .n_register =   snd_pcm_oss_register_minor,
3093         .n_disconnect = snd_pcm_oss_disconnect_minor,
3094         .n_unregister = snd_pcm_oss_unregister_minor,
3095 };
3096
3097 static int __init alsa_pcm_oss_init(void)
3098 {
3099         int i;
3100         int err;
3101
3102         /* check device map table */
3103         for (i = 0; i < SNDRV_CARDS; i++) {
3104                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3105                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3106                                    i, dsp_map[i]);
3107                         dsp_map[i] = 0;
3108                 }
3109                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3110                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3111                                    i, adsp_map[i]);
3112                         adsp_map[i] = 1;
3113                 }
3114         }
3115         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3116                 return err;
3117         return 0;
3118 }
3119
3120 static void __exit alsa_pcm_oss_exit(void)
3121 {
3122         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3123 }
3124
3125 module_init(alsa_pcm_oss_init)
3126 module_exit(alsa_pcm_oss_exit)