kernel/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 bool 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 = rounddown_pow_of_two(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 = roundup_pow_of_two(min_period_size);
 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 = rounddown_pow_of_two(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                 err = -ENOMEM;
 862                 goto failure;
 863         }
 864
 865         if (atomic_read(&substream->mmap_count))
 866                 direct = 1;
 867         else
 868                 direct = substream->oss.setup.direct;
 869
 870         _snd_pcm_hw_params_any(sparams);
 871         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 872         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 873         snd_mask_none(&mask);
 874         if (atomic_read(&substream->mmap_count))
 875                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 876         else {
 877                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 878                 if (!direct)
 879                         snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 880         }
 881         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 882         if (err < 0) {
 883                 pcm_dbg(substream->pcm, "No usable accesses\n");
 884                 err = -EINVAL;
 885                 goto failure;
 886         }
 887         choose_rate(substream, sparams, runtime->oss.rate);
 888         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 889
 890         format = snd_pcm_oss_format_from(runtime->oss.format);
 891
 892         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 893         if (direct)
 894                 sformat = format;
 895         else
 896                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 897
 898         if ((__force int)sformat < 0 ||
 899             !snd_mask_test(&sformat_mask, (__force int)sformat)) {
 900                 for (sformat = (__force snd_pcm_format_t)0;
 901                      (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
 902                      sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
 903                         if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
 904                             snd_pcm_oss_format_to(sformat) >= 0)
 905                                 break;
 906                 }
 907                 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
 908                         pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
 909                         err = -EINVAL;
 910                         goto failure;
 911                 }
 912         }
 913         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
 914         if (err < 0)
 915                 goto failure;
 916
 917         if (direct) {
 918                 memcpy(params, sparams, sizeof(*params));
 919         } else {
 920                 _snd_pcm_hw_params_any(params);
 921                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 922                                       (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 923                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 924                                       (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
 925                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 926                                       runtime->oss.channels, 0);
 927                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 928                                       runtime->oss.rate, 0);
 929                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 930                          params_access(params), params_format(params),
 931                          params_channels(params), params_rate(params));
 932         }
 933         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 934                  params_access(sparams), params_format(sparams),
 935                  params_channels(sparams), params_rate(sparams));
 936
 937         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 938                          params_channels(params) / 8;
 939
 940 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 941         snd_pcm_oss_plugin_clear(substream);
 942         if (!direct) {
 943                 /* add necessary plugins */
 944                 snd_pcm_oss_plugin_clear(substream);
 945                 if ((err = snd_pcm_plug_format_plugins(substream,
 946                                                        params,
 947                                                        sparams)) < 0) {
 948                         pcm_dbg(substream->pcm,
 949                                 "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                                 pcm_dbg(substream->pcm,
 957                                         "snd_pcm_plugin_build_io failed: %i\n", err);
 958                                 snd_pcm_oss_plugin_clear(substream);
 959                                 goto failure;
 960                         }
 961                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 962                                 err = snd_pcm_plugin_append(plugin);
 963                         } else {
 964                                 err = snd_pcm_plugin_insert(plugin);
 965                         }
 966                         if (err < 0) {
 967                                 snd_pcm_oss_plugin_clear(substream);
 968                                 goto failure;
 969                         }
 970                 }
 971         }
 972 #endif
 973
 974         err = snd_pcm_oss_period_size(substream, params, sparams);
 975         if (err < 0)
 976                 goto failure;
 977
 978         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 979         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 980         if (err < 0)
 981                 goto failure;
 982
 983         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 984                                      runtime->oss.periods, NULL);
 985         if (err < 0)
 986                 goto failure;
 987
 988         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 989
 990         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 991                 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
 992                 goto failure;
 993         }
 994
 995         memset(sw_params, 0, sizeof(*sw_params));
 996         if (runtime->oss.trigger) {
 997                 sw_params->start_threshold = 1;
 998         } else {
 999                 sw_params->start_threshold = runtime->boundary;
1000         }
1001         if (atomic_read(&substream->mmap_count) ||
1002             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1003                 sw_params->stop_threshold = runtime->boundary;
1004         else
1005                 sw_params->stop_threshold = runtime->buffer_size;
1006         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1007         sw_params->period_step = 1;
1008         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1009                 1 : runtime->period_size;
1010         if (atomic_read(&substream->mmap_count) ||
1011             substream->oss.setup.nosilence) {
1012                 sw_params->silence_threshold = 0;
1013                 sw_params->silence_size = 0;
1014         } else {
1015                 snd_pcm_uframes_t frames;
1016                 frames = runtime->period_size + 16;
1017                 if (frames > runtime->buffer_size)
1018                         frames = runtime->buffer_size;
1019                 sw_params->silence_threshold = frames;
1020                 sw_params->silence_size = frames;
1021         }
1022
1023         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1024                 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1025                 goto failure;
1026         }
1027
1028         runtime->oss.periods = params_periods(sparams);
1029         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1030         if (oss_period_size < 0) {
1031                 err = -EINVAL;
1032                 goto failure;
1033         }
1034 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1035         if (runtime->oss.plugin_first) {
1036                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1037                 if (err < 0)
1038                         goto failure;
1039         }
1040 #endif
1041         oss_period_size *= oss_frame_size;
1042
1043         oss_buffer_size = oss_period_size * runtime->oss.periods;
1044         if (oss_buffer_size < 0) {
1045                 err = -EINVAL;
1046                 goto failure;
1047         }
1048
1049         runtime->oss.period_bytes = oss_period_size;
1050         runtime->oss.buffer_bytes = oss_buffer_size;
1051
1052         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1053                  runtime->oss.period_bytes,
1054                  runtime->oss.buffer_bytes);
1055         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1056                  params_period_size(sparams),
1057                  params_buffer_size(sparams));
1058
1059         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1060         runtime->oss.channels = params_channels(params);
1061         runtime->oss.rate = params_rate(params);
1062
1063         vfree(runtime->oss.buffer);
1064         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1065         if (!runtime->oss.buffer) {
1066                 err = -ENOMEM;
1067                 goto failure;
1068         }
1069
1070         runtime->oss.params = 0;
1071         runtime->oss.prepare = 1;
1072         runtime->oss.buffer_used = 0;
1073         if (runtime->dma_area)
1074                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1075
1076         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1077
1078         err = 0;
1079 failure:
1080         kfree(sw_params);
1081         kfree(params);
1082         kfree(sparams);
1083         mutex_unlock(&runtime->oss.params_lock);
1084         return err;
1085 }
1086
1087 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1088 {
1089         int idx, err;
1090         struct snd_pcm_substream *asubstream = NULL, *substream;
1091
1092         for (idx = 0; idx < 2; idx++) {
1093                 substream = pcm_oss_file->streams[idx];
1094                 if (substream == NULL)
1095                         continue;
1096                 if (asubstream == NULL)
1097                         asubstream = substream;
1098                 if (substream->runtime->oss.params) {
1099                         err = snd_pcm_oss_change_params(substream, false);
1100                         if (err < 0)
1101                                 return err;
1102                 }
1103         }
1104         if (!asubstream)
1105                 return -EIO;
1106         if (r_substream)
1107                 *r_substream = asubstream;
1108         return 0;
1109 }
1110
1111 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1112 {
1113         int err;
1114         struct snd_pcm_runtime *runtime = substream->runtime;
1115
1116         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1117         if (err < 0) {
1118                 pcm_dbg(substream->pcm,
1119                         "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1120                 return err;
1121         }
1122         runtime->oss.prepare = 0;
1123         runtime->oss.prev_hw_ptr_period = 0;
1124         runtime->oss.period_ptr = 0;
1125         runtime->oss.buffer_used = 0;
1126
1127         return 0;
1128 }
1129
1130 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1131 {
1132         struct snd_pcm_runtime *runtime;
1133         int err;
1134
1135         if (substream == NULL)
1136                 return 0;
1137         runtime = substream->runtime;
1138         if (runtime->oss.params) {
1139                 err = snd_pcm_oss_change_params(substream, false);
1140                 if (err < 0)
1141                         return err;
1142         }
1143         if (runtime->oss.prepare) {
1144                 err = snd_pcm_oss_prepare(substream);
1145                 if (err < 0)
1146                         return err;
1147         }
1148         return 0;
1149 }
1150
1151 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1152 {
1153         struct snd_pcm_runtime *runtime;
1154         snd_pcm_uframes_t frames;
1155         int err = 0;
1156
1157         while (1) {
1158                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1159                 if (err < 0)
1160                         break;
1161                 runtime = substream->runtime;
1162                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1163                         break;
1164                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1165                 /* until avail(delay) <= buffer_size */
1166                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1167                 frames /= runtime->period_size;
1168                 frames *= runtime->period_size;
1169                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1170                 if (err < 0)
1171                         break;
1172         }
1173         return err;
1174 }
1175
1176 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1177 {
1178         struct snd_pcm_runtime *runtime = substream->runtime;
1179         int ret;
1180         while (1) {
1181                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1182                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1183 #ifdef OSS_DEBUG
1184                         pcm_dbg(substream->pcm,
1185                                 "pcm_oss: write: recovering from %s\n",
1186                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1187                                 "XRUN" : "SUSPEND");
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                         pcm_dbg(substream->pcm,
1221                                 "pcm_oss: read: recovering from %s\n",
1222                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1223                                 "XRUN" : "SUSPEND");
1224 #endif
1225                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1226                         if (ret < 0)
1227                                 break;
1228                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1229                         ret = snd_pcm_oss_prepare(substream);
1230                         if (ret < 0)
1231                                 break;
1232                 }
1233                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1234                 if (ret < 0)
1235                         break;
1236                 if (in_kernel) {
1237                         mm_segment_t fs;
1238                         fs = snd_enter_user();
1239                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1240                         snd_leave_user(fs);
1241                 } else {
1242                         ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1243                 }
1244                 if (ret == -EPIPE) {
1245                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1246                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1247                                 if (ret < 0)
1248                                         break;
1249                         }
1250                         continue;
1251                 }
1252                 if (ret != -ESTRPIPE)
1253                         break;
1254         }
1255         return ret;
1256 }
1257
1258 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1259 {
1260         struct snd_pcm_runtime *runtime = substream->runtime;
1261         int ret;
1262         while (1) {
1263                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1264                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1265 #ifdef OSS_DEBUG
1266                         pcm_dbg(substream->pcm,
1267                                 "pcm_oss: writev: recovering from %s\n",
1268                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1269                                 "XRUN" : "SUSPEND");
1270 #endif
1271                         ret = snd_pcm_oss_prepare(substream);
1272                         if (ret < 0)
1273                                 break;
1274                 }
1275                 if (in_kernel) {
1276                         mm_segment_t fs;
1277                         fs = snd_enter_user();
1278                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279                         snd_leave_user(fs);
1280                 } else {
1281                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1282                 }
1283                 if (ret != -EPIPE && ret != -ESTRPIPE)
1284                         break;
1285
1286                 /* test, if we can't store new data, because the stream */
1287                 /* has not been started */
1288                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1289                         return -EAGAIN;
1290         }
1291         return ret;
1292 }
1293
1294 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1295 {
1296         struct snd_pcm_runtime *runtime = substream->runtime;
1297         int ret;
1298         while (1) {
1299                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1300                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1301 #ifdef OSS_DEBUG
1302                         pcm_dbg(substream->pcm,
1303                                 "pcm_oss: readv: recovering from %s\n",
1304                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1305                                 "XRUN" : "SUSPEND");
1306 #endif
1307                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1308                         if (ret < 0)
1309                                 break;
1310                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1311                         ret = snd_pcm_oss_prepare(substream);
1312                         if (ret < 0)
1313                                 break;
1314                 }
1315                 if (in_kernel) {
1316                         mm_segment_t fs;
1317                         fs = snd_enter_user();
1318                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1319                         snd_leave_user(fs);
1320                 } else {
1321                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1322                 }
1323                 if (ret != -EPIPE && ret != -ESTRPIPE)
1324                         break;
1325         }
1326         return ret;
1327 }
1328
1329 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1330 {
1331         struct snd_pcm_runtime *runtime = substream->runtime;
1332         snd_pcm_sframes_t frames, frames1;
1333 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1334         if (runtime->oss.plugin_first) {
1335                 struct snd_pcm_plugin_channel *channels;
1336                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1337                 if (!in_kernel) {
1338                         if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1339                                 return -EFAULT;
1340                         buf = runtime->oss.buffer;
1341                 }
1342                 frames = bytes / oss_frame_bytes;
1343                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1344                 if (frames1 < 0)
1345                         return frames1;
1346                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1347                 if (frames1 <= 0)
1348                         return frames1;
1349                 bytes = frames1 * oss_frame_bytes;
1350         } else
1351 #endif
1352         {
1353                 frames = bytes_to_frames(runtime, bytes);
1354                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1355                 if (frames1 <= 0)
1356                         return frames1;
1357                 bytes = frames_to_bytes(runtime, frames1);
1358         }
1359         return bytes;
1360 }
1361
1362 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1363 {
1364         size_t xfer = 0;
1365         ssize_t tmp;
1366         struct snd_pcm_runtime *runtime = substream->runtime;
1367
1368         if (atomic_read(&substream->mmap_count))
1369                 return -ENXIO;
1370
1371         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1372                 return tmp;
1373         mutex_lock(&runtime->oss.params_lock);
1374         while (bytes > 0) {
1375                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1376                         tmp = bytes;
1377                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1378                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1379                         if (tmp > 0) {
1380                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1381                                         tmp = -EFAULT;
1382                                         goto err;
1383                                 }
1384                         }
1385                         runtime->oss.buffer_used += tmp;
1386                         buf += tmp;
1387                         bytes -= tmp;
1388                         xfer += tmp;
1389                         if (substream->oss.setup.partialfrag ||
1390                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1391                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1392                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1393                                 if (tmp <= 0)
1394                                         goto err;
1395                                 runtime->oss.bytes += tmp;
1396                                 runtime->oss.period_ptr += tmp;
1397                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1398                                 if (runtime->oss.period_ptr == 0 ||
1399                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1400                                         runtime->oss.buffer_used = 0;
1401                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1402                                         tmp = -EAGAIN;
1403                                         goto err;
1404                                 }
1405                         }
1406                 } else {
1407                         tmp = snd_pcm_oss_write2(substream,
1408                                                  (const char __force *)buf,
1409                                                  runtime->oss.period_bytes, 0);
1410                         if (tmp <= 0)
1411                                 goto err;
1412                         runtime->oss.bytes += tmp;
1413                         buf += tmp;
1414                         bytes -= tmp;
1415                         xfer += tmp;
1416                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1417                             tmp != runtime->oss.period_bytes)
1418                                 break;
1419                 }
1420         }
1421         mutex_unlock(&runtime->oss.params_lock);
1422         return xfer;
1423
1424  err:
1425         mutex_unlock(&runtime->oss.params_lock);
1426         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1427 }
1428
1429 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1430 {
1431         struct snd_pcm_runtime *runtime = substream->runtime;
1432         snd_pcm_sframes_t frames, frames1;
1433 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1434         char __user *final_dst = (char __force __user *)buf;
1435         if (runtime->oss.plugin_first) {
1436                 struct snd_pcm_plugin_channel *channels;
1437                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1438                 if (!in_kernel)
1439                         buf = runtime->oss.buffer;
1440                 frames = bytes / oss_frame_bytes;
1441                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1442                 if (frames1 < 0)
1443                         return frames1;
1444                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1445                 if (frames1 <= 0)
1446                         return frames1;
1447                 bytes = frames1 * oss_frame_bytes;
1448                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1449                         return -EFAULT;
1450         } else
1451 #endif
1452         {
1453                 frames = bytes_to_frames(runtime, bytes);
1454                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1455                 if (frames1 <= 0)
1456                         return frames1;
1457                 bytes = frames_to_bytes(runtime, frames1);
1458         }
1459         return bytes;
1460 }
1461
1462 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1463 {
1464         size_t xfer = 0;
1465         ssize_t tmp;
1466         struct snd_pcm_runtime *runtime = substream->runtime;
1467
1468         if (atomic_read(&substream->mmap_count))
1469                 return -ENXIO;
1470
1471         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1472                 return tmp;
1473         mutex_lock(&runtime->oss.params_lock);
1474         while (bytes > 0) {
1475                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1476                         if (runtime->oss.buffer_used == 0) {
1477                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1478                                 if (tmp <= 0)
1479                                         goto err;
1480                                 runtime->oss.bytes += tmp;
1481                                 runtime->oss.period_ptr = tmp;
1482                                 runtime->oss.buffer_used = tmp;
1483                         }
1484                         tmp = bytes;
1485                         if ((size_t) tmp > runtime->oss.buffer_used)
1486                                 tmp = runtime->oss.buffer_used;
1487                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1488                                 tmp = -EFAULT;
1489                                 goto err;
1490                         }
1491                         buf += tmp;
1492                         bytes -= tmp;
1493                         xfer += tmp;
1494                         runtime->oss.buffer_used -= tmp;
1495                 } else {
1496                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1497                                                 runtime->oss.period_bytes, 0);
1498                         if (tmp <= 0)
1499                                 goto err;
1500                         runtime->oss.bytes += tmp;
1501                         buf += tmp;
1502                         bytes -= tmp;
1503                         xfer += tmp;
1504                 }
1505         }
1506         mutex_unlock(&runtime->oss.params_lock);
1507         return xfer;
1508
1509  err:
1510         mutex_unlock(&runtime->oss.params_lock);
1511         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1512 }
1513
1514 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1515 {
1516         struct snd_pcm_substream *substream;
1517         struct snd_pcm_runtime *runtime;
1518         int i;
1519
1520         for (i = 0; i < 2; i++) {
1521                 substream = pcm_oss_file->streams[i];
1522                 if (!substream)
1523                         continue;
1524                 runtime = substream->runtime;
1525                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1526                 runtime->oss.prepare = 1;
1527                 runtime->oss.buffer_used = 0;
1528                 runtime->oss.prev_hw_ptr_period = 0;
1529                 runtime->oss.period_ptr = 0;
1530         }
1531         return 0;
1532 }
1533
1534 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1535 {
1536         struct snd_pcm_substream *substream;
1537         int err;
1538
1539         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1540         if (substream != NULL) {
1541                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1542                         return err;
1543                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1544         }
1545         /* note: all errors from the start action are ignored */
1546         /* OSS apps do not know, how to handle them */
1547         return 0;
1548 }
1549
1550 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1551 {
1552         struct snd_pcm_runtime *runtime;
1553         ssize_t result = 0;
1554         snd_pcm_state_t state;
1555         long res;
1556         wait_queue_t wait;
1557
1558         runtime = substream->runtime;
1559         init_waitqueue_entry(&wait, current);
1560         add_wait_queue(&runtime->sleep, &wait);
1561 #ifdef OSS_DEBUG
1562         pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1563 #endif
1564         while (1) {
1565                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1566                 if (result > 0) {
1567                         runtime->oss.buffer_used = 0;
1568                         result = 0;
1569                         break;
1570                 }
1571                 if (result != 0 && result != -EAGAIN)
1572                         break;
1573                 result = 0;
1574                 set_current_state(TASK_INTERRUPTIBLE);
1575                 snd_pcm_stream_lock_irq(substream);
1576                 state = runtime->status->state;
1577                 snd_pcm_stream_unlock_irq(substream);
1578                 if (state != SNDRV_PCM_STATE_RUNNING) {
1579                         set_current_state(TASK_RUNNING);
1580                         break;
1581                 }
1582                 res = schedule_timeout(10 * HZ);
1583                 if (signal_pending(current)) {
1584                         result = -ERESTARTSYS;
1585                         break;
1586                 }
1587                 if (res == 0) {
1588                         pcm_err(substream->pcm,
1589                                 "OSS sync error - DMA timeout\n");
1590                         result = -EIO;
1591                         break;
1592                 }
1593         }
1594         remove_wait_queue(&runtime->sleep, &wait);
1595         return result;
1596 }
1597
1598 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1599 {
1600         int err = 0;
1601         unsigned int saved_f_flags;
1602         struct snd_pcm_substream *substream;
1603         struct snd_pcm_runtime *runtime;
1604         snd_pcm_format_t format;
1605         unsigned long width;
1606         size_t size;
1607
1608         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1609         if (substream != NULL) {
1610                 runtime = substream->runtime;
1611                 if (atomic_read(&substream->mmap_count))
1612                         goto __direct;
1613                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1614                         return err;
1615                 format = snd_pcm_oss_format_from(runtime->oss.format);
1616                 width = snd_pcm_format_physical_width(format);
1617                 mutex_lock(&runtime->oss.params_lock);
1618                 if (runtime->oss.buffer_used > 0) {
1619 #ifdef OSS_DEBUG
1620                         pcm_dbg(substream->pcm, "sync: buffer_used\n");
1621 #endif
1622                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1623                         snd_pcm_format_set_silence(format,
1624                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1625                                                    size);
1626                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1627                         if (err < 0) {
1628                                 mutex_unlock(&runtime->oss.params_lock);
1629                                 return err;
1630                         }
1631                 } else if (runtime->oss.period_ptr > 0) {
1632 #ifdef OSS_DEBUG
1633                         pcm_dbg(substream->pcm, "sync: period_ptr\n");
1634 #endif
1635                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1636                         snd_pcm_format_set_silence(format,
1637                                                    runtime->oss.buffer,
1638                                                    size * 8 / width);
1639                         err = snd_pcm_oss_sync1(substream, size);
1640                         if (err < 0) {
1641                                 mutex_unlock(&runtime->oss.params_lock);
1642                                 return err;
1643                         }
1644                 }
1645                 /*
1646                  * The ALSA's period might be a bit large than OSS one.
1647                  * Fill the remain portion of ALSA period with zeros.
1648                  */
1649                 size = runtime->control->appl_ptr % runtime->period_size;
1650                 if (size > 0) {
1651                         size = runtime->period_size - size;
1652                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1653                                 size = (runtime->frame_bits * size) / 8;
1654                                 while (size > 0) {
1655                                         mm_segment_t fs;
1656                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1657                                         size -= size1;
1658                                         size1 *= 8;
1659                                         size1 /= runtime->sample_bits;
1660                                         snd_pcm_format_set_silence(runtime->format,
1661                                                                    runtime->oss.buffer,
1662                                                                    size1);
1663                                         size1 /= runtime->channels; /* frames */
1664                                         fs = snd_enter_user();
1665                                         snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1666                                         snd_leave_user(fs);
1667                                 }
1668                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1669                                 void __user *buffers[runtime->channels];
1670                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1671                                 snd_pcm_lib_writev(substream, buffers, size);
1672                         }
1673                 }
1674                 mutex_unlock(&runtime->oss.params_lock);
1675                 /*
1676                  * finish sync: drain the buffer
1677                  */
1678               __direct:
1679                 saved_f_flags = substream->f_flags;
1680                 substream->f_flags &= ~O_NONBLOCK;
1681                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1682                 substream->f_flags = saved_f_flags;
1683                 if (err < 0)
1684                         return err;
1685                 runtime->oss.prepare = 1;
1686         }
1687
1688         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1689         if (substream != NULL) {
1690                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1691                         return err;
1692                 runtime = substream->runtime;
1693                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1694                 if (err < 0)
1695                         return err;
1696                 runtime->oss.buffer_used = 0;
1697                 runtime->oss.prepare = 1;
1698         }
1699         return 0;
1700 }
1701
1702 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1703 {
1704         int idx;
1705
1706         for (idx = 1; idx >= 0; --idx) {
1707                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1708                 struct snd_pcm_runtime *runtime;
1709                 if (substream == NULL)
1710                         continue;
1711                 runtime = substream->runtime;
1712                 if (rate < 1000)
1713                         rate = 1000;
1714                 else if (rate > 192000)
1715                         rate = 192000;
1716                 if (runtime->oss.rate != rate) {
1717                         runtime->oss.params = 1;
1718                         runtime->oss.rate = rate;
1719                 }
1720         }
1721         return snd_pcm_oss_get_rate(pcm_oss_file);
1722 }
1723
1724 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1725 {
1726         struct snd_pcm_substream *substream;
1727         int err;
1728
1729         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1730                 return err;
1731         return substream->runtime->oss.rate;
1732 }
1733
1734 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1735 {
1736         int idx;
1737         if (channels < 1)
1738                 channels = 1;
1739         if (channels > 128)
1740                 return -EINVAL;
1741         for (idx = 1; idx >= 0; --idx) {
1742                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1743                 struct snd_pcm_runtime *runtime;
1744                 if (substream == NULL)
1745                         continue;
1746                 runtime = substream->runtime;
1747                 if (runtime->oss.channels != channels) {
1748                         runtime->oss.params = 1;
1749                         runtime->oss.channels = channels;
1750                 }
1751         }
1752         return snd_pcm_oss_get_channels(pcm_oss_file);
1753 }
1754
1755 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1756 {
1757         struct snd_pcm_substream *substream;
1758         int err;
1759
1760         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1761                 return err;
1762         return substream->runtime->oss.channels;
1763 }
1764
1765 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1766 {
1767         struct snd_pcm_substream *substream;
1768         int err;
1769
1770         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1771                 return err;
1772         return substream->runtime->oss.period_bytes;
1773 }
1774
1775 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1776 {
1777         struct snd_pcm_substream *substream;
1778         int err;
1779         int direct;
1780         struct snd_pcm_hw_params *params;
1781         unsigned int formats = 0;
1782         struct snd_mask format_mask;
1783         int fmt;
1784
1785         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1786                 return err;
1787         if (atomic_read(&substream->mmap_count))
1788                 direct = 1;
1789         else
1790                 direct = substream->oss.setup.direct;
1791         if (!direct)
1792                 return AFMT_MU_LAW | AFMT_U8 |
1793                        AFMT_S16_LE | AFMT_S16_BE |
1794                        AFMT_S8 | AFMT_U16_LE |
1795                        AFMT_U16_BE |
1796                         AFMT_S32_LE | AFMT_S32_BE |
1797                         AFMT_S24_LE | AFMT_S24_BE |
1798                         AFMT_S24_PACKED;
1799         params = kmalloc(sizeof(*params), GFP_KERNEL);
1800         if (!params)
1801                 return -ENOMEM;
1802         _snd_pcm_hw_params_any(params);
1803         err = snd_pcm_hw_refine(substream, params);
1804         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1805         kfree(params);
1806         if (err < 0)
1807                 return err;
1808         for (fmt = 0; fmt < 32; ++fmt) {
1809                 if (snd_mask_test(&format_mask, fmt)) {
1810                         int f = snd_pcm_oss_format_to(fmt);
1811                         if (f >= 0)
1812                                 formats |= f;
1813                 }
1814         }
1815         return formats;
1816 }
1817
1818 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1819 {
1820         int formats, idx;
1821
1822         if (format != AFMT_QUERY) {
1823                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1824                 if (formats < 0)
1825                         return formats;
1826                 if (!(formats & format))
1827                         format = AFMT_U8;
1828                 for (idx = 1; idx >= 0; --idx) {
1829                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1830                         struct snd_pcm_runtime *runtime;
1831                         if (substream == NULL)
1832                                 continue;
1833                         runtime = substream->runtime;
1834                         if (runtime->oss.format != format) {
1835                                 runtime->oss.params = 1;
1836                                 runtime->oss.format = format;
1837                         }
1838                 }
1839         }
1840         return snd_pcm_oss_get_format(pcm_oss_file);
1841 }
1842
1843 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1844 {
1845         struct snd_pcm_substream *substream;
1846         int err;
1847
1848         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1849                 return err;
1850         return substream->runtime->oss.format;
1851 }
1852
1853 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1854 {
1855         struct snd_pcm_runtime *runtime;
1856
1857         if (substream == NULL)
1858                 return 0;
1859         runtime = substream->runtime;
1860         if (subdivide == 0) {
1861                 subdivide = runtime->oss.subdivision;
1862                 if (subdivide == 0)
1863                         subdivide = 1;
1864                 return subdivide;
1865         }
1866         if (runtime->oss.subdivision || runtime->oss.fragshift)
1867                 return -EINVAL;
1868         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1869             subdivide != 8 && subdivide != 16)
1870                 return -EINVAL;
1871         runtime->oss.subdivision = subdivide;
1872         runtime->oss.params = 1;
1873         return subdivide;
1874 }
1875
1876 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1877 {
1878         int err = -EINVAL, idx;
1879
1880         for (idx = 1; idx >= 0; --idx) {
1881                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1882                 if (substream == NULL)
1883                         continue;
1884                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1885                         return err;
1886         }
1887         return err;
1888 }
1889
1890 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1891 {
1892         struct snd_pcm_runtime *runtime;
1893
1894         if (substream == NULL)
1895                 return 0;
1896         runtime = substream->runtime;
1897         if (runtime->oss.subdivision || runtime->oss.fragshift)
1898                 return -EINVAL;
1899         runtime->oss.fragshift = val & 0xffff;
1900         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1901         if (runtime->oss.fragshift < 4)         /* < 16 */
1902                 runtime->oss.fragshift = 4;
1903         if (runtime->oss.maxfrags < 2)
1904                 runtime->oss.maxfrags = 2;
1905         runtime->oss.params = 1;
1906         return 0;
1907 }
1908
1909 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1910 {
1911         int err = -EINVAL, idx;
1912
1913         for (idx = 1; idx >= 0; --idx) {
1914                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1915                 if (substream == NULL)
1916                         continue;
1917                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1918                         return err;
1919         }
1920         return err;
1921 }
1922
1923 static int snd_pcm_oss_nonblock(struct file * file)
1924 {
1925         spin_lock(&file->f_lock);
1926         file->f_flags |= O_NONBLOCK;
1927         spin_unlock(&file->f_lock);
1928         return 0;
1929 }
1930
1931 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1932 {
1933
1934         if (substream == NULL) {
1935                 res &= ~DSP_CAP_DUPLEX;
1936                 return res;
1937         }
1938 #ifdef DSP_CAP_MULTI
1939         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1940                 if (substream->pstr->substream_count > 1)
1941                         res |= DSP_CAP_MULTI;
1942 #endif
1943         /* DSP_CAP_REALTIME is set all times: */
1944         /* all ALSA drivers can return actual pointer in ring buffer */
1945 #if defined(DSP_CAP_REALTIME) && 0
1946         {
1947                 struct snd_pcm_runtime *runtime = substream->runtime;
1948                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1949                         res &= ~DSP_CAP_REALTIME;
1950         }
1951 #endif
1952         return res;
1953 }
1954
1955 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1956 {
1957         int result, idx;
1958
1959         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1960         for (idx = 0; idx < 2; idx++) {
1961                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1962                 result = snd_pcm_oss_get_caps1(substream, result);
1963         }
1964         result |= 0x0001;       /* revision - same as SB AWE 64 */
1965         return result;
1966 }
1967
1968 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1969                                       snd_pcm_uframes_t hw_ptr)
1970 {
1971         struct snd_pcm_runtime *runtime = substream->runtime;
1972         snd_pcm_uframes_t appl_ptr;
1973         appl_ptr = hw_ptr + runtime->buffer_size;
1974         appl_ptr %= runtime->boundary;
1975         runtime->control->appl_ptr = appl_ptr;
1976 }
1977
1978 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1979 {
1980         struct snd_pcm_runtime *runtime;
1981         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1982         int err, cmd;
1983
1984 #ifdef OSS_DEBUG
1985         pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1986 #endif
1987
1988         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1989         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1990
1991         if (psubstream) {
1992                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1993                         return err;
1994         }
1995         if (csubstream) {
1996                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1997                         return err;
1998         }
1999         if (psubstream) {
2000                 runtime = psubstream->runtime;
2001                 if (trigger & PCM_ENABLE_OUTPUT) {
2002                         if (runtime->oss.trigger)
2003                                 goto _skip1;
2004                         if (atomic_read(&psubstream->mmap_count))
2005                                 snd_pcm_oss_simulate_fill(psubstream,
2006                                                 get_hw_ptr_period(runtime));
2007                         runtime->oss.trigger = 1;
2008                         runtime->start_threshold = 1;
2009                         cmd = SNDRV_PCM_IOCTL_START;
2010                 } else {
2011                         if (!runtime->oss.trigger)
2012                                 goto _skip1;
2013                         runtime->oss.trigger = 0;
2014                         runtime->start_threshold = runtime->boundary;
2015                         cmd = SNDRV_PCM_IOCTL_DROP;
2016                         runtime->oss.prepare = 1;
2017                 }
2018                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2019                 if (err < 0)
2020                         return err;
2021         }
2022  _skip1:
2023         if (csubstream) {
2024                 runtime = csubstream->runtime;
2025                 if (trigger & PCM_ENABLE_INPUT) {
2026                         if (runtime->oss.trigger)
2027                                 goto _skip2;
2028                         runtime->oss.trigger = 1;
2029                         runtime->start_threshold = 1;
2030                         cmd = SNDRV_PCM_IOCTL_START;
2031                 } else {
2032                         if (!runtime->oss.trigger)
2033                                 goto _skip2;
2034                         runtime->oss.trigger = 0;
2035                         runtime->start_threshold = runtime->boundary;
2036                         cmd = SNDRV_PCM_IOCTL_DROP;
2037                         runtime->oss.prepare = 1;
2038                 }
2039                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2040                 if (err < 0)
2041                         return err;
2042         }
2043  _skip2:
2044         return 0;
2045 }
2046
2047 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2048 {
2049         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2050         int result = 0;
2051
2052         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2053         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2054         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2055                 result |= PCM_ENABLE_OUTPUT;
2056         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2057                 result |= PCM_ENABLE_INPUT;
2058         return result;
2059 }
2060
2061 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2062 {
2063         struct snd_pcm_substream *substream;
2064         struct snd_pcm_runtime *runtime;
2065         snd_pcm_sframes_t delay;
2066         int err;
2067
2068         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2069         if (substream == NULL)
2070                 return -EINVAL;
2071         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2072                 return err;
2073         runtime = substream->runtime;
2074         if (runtime->oss.params || runtime->oss.prepare)
2075                 return 0;
2076         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2077         if (err == -EPIPE)
2078                 delay = 0;      /* hack for broken OSS applications */
2079         else if (err < 0)
2080                 return err;
2081         return snd_pcm_oss_bytes(substream, delay);
2082 }
2083
2084 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2085 {
2086         struct snd_pcm_substream *substream;
2087         struct snd_pcm_runtime *runtime;
2088         snd_pcm_sframes_t delay;
2089         int fixup;
2090         struct count_info info;
2091         int err;
2092
2093         if (_info == NULL)
2094                 return -EFAULT;
2095         substream = pcm_oss_file->streams[stream];
2096         if (substream == NULL)
2097                 return -EINVAL;
2098         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2099                 return err;
2100         runtime = substream->runtime;
2101         if (runtime->oss.params || runtime->oss.prepare) {
2102                 memset(&info, 0, sizeof(info));
2103                 if (copy_to_user(_info, &info, sizeof(info)))
2104                         return -EFAULT;
2105                 return 0;
2106         }
2107         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2108                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2109                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2110                         err = 0;
2111                         delay = 0;
2112                         fixup = 0;
2113                 } else {
2114                         fixup = runtime->oss.buffer_used;
2115                 }
2116         } else {
2117                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2118                 fixup = -runtime->oss.buffer_used;
2119         }
2120         if (err < 0)
2121                 return err;
2122         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2123         if (atomic_read(&substream->mmap_count)) {
2124                 snd_pcm_sframes_t n;
2125                 delay = get_hw_ptr_period(runtime);
2126                 n = delay - runtime->oss.prev_hw_ptr_period;
2127                 if (n < 0)
2128                         n += runtime->boundary;
2129                 info.blocks = n / runtime->period_size;
2130                 runtime->oss.prev_hw_ptr_period = delay;
2131                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2132                         snd_pcm_oss_simulate_fill(substream, delay);
2133                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2134         } else {
2135                 delay = snd_pcm_oss_bytes(substream, delay);
2136                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2137                         if (substream->oss.setup.buggyptr)
2138                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2139                         else
2140                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2141                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2142                 } else {
2143                         delay += fixup;
2144                         info.blocks = delay / runtime->oss.period_bytes;
2145                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2146                 }
2147         }
2148         if (copy_to_user(_info, &info, sizeof(info)))
2149                 return -EFAULT;
2150         return 0;
2151 }
2152
2153 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2154 {
2155         struct snd_pcm_substream *substream;
2156         struct snd_pcm_runtime *runtime;
2157         snd_pcm_sframes_t avail;
2158         int fixup;
2159         struct audio_buf_info info;
2160         int err;
2161
2162         if (_info == NULL)
2163                 return -EFAULT;
2164         substream = pcm_oss_file->streams[stream];
2165         if (substream == NULL)
2166                 return -EINVAL;
2167         runtime = substream->runtime;
2168
2169         if (runtime->oss.params &&
2170             (err = snd_pcm_oss_change_params(substream, false)) < 0)
2171                 return err;
2172
2173         info.fragsize = runtime->oss.period_bytes;
2174         info.fragstotal = runtime->periods;
2175         if (runtime->oss.prepare) {
2176                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2177                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2178                         info.fragments = runtime->oss.periods;
2179                 } else {
2180                         info.bytes = 0;
2181                         info.fragments = 0;
2182                 }
2183         } else {
2184                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2185                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2186                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2187                                 avail = runtime->buffer_size;
2188                                 err = 0;
2189                                 fixup = 0;
2190                         } else {
2191                                 avail = runtime->buffer_size - avail;
2192                                 fixup = -runtime->oss.buffer_used;
2193                         }
2194                 } else {
2195                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2196                         fixup = runtime->oss.buffer_used;
2197                 }
2198                 if (err < 0)
2199                         return err;
2200                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2201                 info.fragments = info.bytes / runtime->oss.period_bytes;
2202         }
2203
2204 #ifdef OSS_DEBUG
2205         pcm_dbg(substream->pcm,
2206                 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2207                 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2208 #endif
2209         if (copy_to_user(_info, &info, sizeof(info)))
2210                 return -EFAULT;
2211         return 0;
2212 }
2213
2214 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2215 {
2216         // it won't be probably implemented
2217         // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2218         return -EINVAL;
2219 }
2220
2221 static const char *strip_task_path(const char *path)
2222 {
2223         const char *ptr, *ptrl = NULL;
2224         for (ptr = path; *ptr; ptr++) {
2225                 if (*ptr == '/')
2226                         ptrl = ptr + 1;
2227         }
2228         return ptrl;
2229 }
2230
2231 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2232                                       const char *task_name,
2233                                       struct snd_pcm_oss_setup *rsetup)
2234 {
2235         struct snd_pcm_oss_setup *setup;
2236
2237         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2238         do {
2239                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2240                      setup = setup->next) {
2241                         if (!strcmp(setup->task_name, task_name))
2242                                 goto out;
2243                 }
2244         } while ((task_name = strip_task_path(task_name)) != NULL);
2245  out:
2246         if (setup)
2247                 *rsetup = *setup;
2248         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2249 }
2250
2251 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2252 {
2253         struct snd_pcm_runtime *runtime;
2254         runtime = substream->runtime;
2255         vfree(runtime->oss.buffer);
2256         runtime->oss.buffer = NULL;
2257 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2258         snd_pcm_oss_plugin_clear(substream);
2259 #endif
2260         substream->oss.oss = 0;
2261 }
2262
2263 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2264                                        struct snd_pcm_oss_setup *setup,
2265                                        int minor)
2266 {
2267         struct snd_pcm_runtime *runtime;
2268
2269         substream->oss.oss = 1;
2270         substream->oss.setup = *setup;
2271         if (setup->nonblock)
2272                 substream->f_flags |= O_NONBLOCK;
2273         else if (setup->block)
2274                 substream->f_flags &= ~O_NONBLOCK;
2275         runtime = substream->runtime;
2276         runtime->oss.params = 1;
2277         runtime->oss.trigger = 1;
2278         runtime->oss.rate = 8000;
2279         mutex_init(&runtime->oss.params_lock);
2280         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2281         case SNDRV_MINOR_OSS_PCM_8:
2282                 runtime->oss.format = AFMT_U8;
2283                 break;
2284         case SNDRV_MINOR_OSS_PCM_16:
2285                 runtime->oss.format = AFMT_S16_LE;
2286                 break;
2287         default:
2288                 runtime->oss.format = AFMT_MU_LAW;
2289         }
2290         runtime->oss.channels = 1;
2291         runtime->oss.fragshift = 0;
2292         runtime->oss.maxfrags = 0;
2293         runtime->oss.subdivision = 0;
2294         substream->pcm_release = snd_pcm_oss_release_substream;
2295 }
2296
2297 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2298 {
2299         int cidx;
2300         if (!pcm_oss_file)
2301                 return 0;
2302         for (cidx = 0; cidx < 2; ++cidx) {
2303                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2304                 if (substream)
2305                         snd_pcm_release_substream(substream);
2306         }
2307         kfree(pcm_oss_file);
2308         return 0;
2309 }
2310
2311 static int snd_pcm_oss_open_file(struct file *file,
2312                                  struct snd_pcm *pcm,
2313                                  struct snd_pcm_oss_file **rpcm_oss_file,
2314                                  int minor,
2315                                  struct snd_pcm_oss_setup *setup)
2316 {
2317         int idx, err;
2318         struct snd_pcm_oss_file *pcm_oss_file;
2319         struct snd_pcm_substream *substream;
2320         fmode_t f_mode = file->f_mode;
2321
2322         if (rpcm_oss_file)
2323                 *rpcm_oss_file = NULL;
2324
2325         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2326         if (pcm_oss_file == NULL)
2327                 return -ENOMEM;
2328
2329         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2330             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2331                 f_mode = FMODE_WRITE;
2332
2333         file->f_flags &= ~O_APPEND;
2334         for (idx = 0; idx < 2; idx++) {
2335                 if (setup[idx].disable)
2336                         continue;
2337                 if (! pcm->streams[idx].substream_count)
2338                         continue; /* no matching substream */
2339                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2340                         if (! (f_mode & FMODE_WRITE))
2341                                 continue;
2342                 } else {
2343                         if (! (f_mode & FMODE_READ))
2344                                 continue;
2345                 }
2346                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2347                 if (err < 0) {
2348                         snd_pcm_oss_release_file(pcm_oss_file);
2349                         return err;
2350                 }
2351
2352                 pcm_oss_file->streams[idx] = substream;
2353                 substream->file = pcm_oss_file;
2354                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2355         }
2356
2357         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2358                 snd_pcm_oss_release_file(pcm_oss_file);
2359                 return -EINVAL;
2360         }
2361
2362         file->private_data = pcm_oss_file;
2363         if (rpcm_oss_file)
2364                 *rpcm_oss_file = pcm_oss_file;
2365         return 0;
2366 }
2367
2368
2369 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2370 {
2371         unsigned int idx;
2372
2373         if (snd_BUG_ON(!task || !name || size < 2))
2374                 return -EINVAL;
2375         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2376                 name[idx] = task->comm[idx];
2377         name[idx] = '\0';
2378         return 0;
2379 }
2380
2381 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2382 {
2383         int err;
2384         char task_name[32];
2385         struct snd_pcm *pcm;
2386         struct snd_pcm_oss_file *pcm_oss_file;
2387         struct snd_pcm_oss_setup setup[2];
2388         int nonblock;
2389         wait_queue_t wait;
2390
2391         err = nonseekable_open(inode, file);
2392         if (err < 0)
2393                 return err;
2394
2395         pcm = snd_lookup_oss_minor_data(iminor(inode),
2396                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2397         if (pcm == NULL) {
2398                 err = -ENODEV;
2399                 goto __error1;
2400         }
2401         err = snd_card_file_add(pcm->card, file);
2402         if (err < 0)
2403                 goto __error1;
2404         if (!try_module_get(pcm->card->module)) {
2405                 err = -EFAULT;
2406                 goto __error2;
2407         }
2408         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2409                 err = -EFAULT;
2410                 goto __error;
2411         }
2412         memset(setup, 0, sizeof(setup));
2413         if (file->f_mode & FMODE_WRITE)
2414                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2415                                            task_name, &setup[0]);
2416         if (file->f_mode & FMODE_READ)
2417                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2418                                            task_name, &setup[1]);
2419
2420         nonblock = !!(file->f_flags & O_NONBLOCK);
2421         if (!nonblock)
2422                 nonblock = nonblock_open;
2423
2424         init_waitqueue_entry(&wait, current);
2425         add_wait_queue(&pcm->open_wait, &wait);
2426         mutex_lock(&pcm->open_mutex);
2427         while (1) {
2428                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2429                                             iminor(inode), setup);
2430                 if (err >= 0)
2431                         break;
2432                 if (err == -EAGAIN) {
2433                         if (nonblock) {
2434                                 err = -EBUSY;
2435                                 break;
2436                         }
2437                 } else
2438                         break;
2439                 set_current_state(TASK_INTERRUPTIBLE);
2440                 mutex_unlock(&pcm->open_mutex);
2441                 schedule();
2442                 mutex_lock(&pcm->open_mutex);
2443                 if (pcm->card->shutdown) {
2444                         err = -ENODEV;
2445                         break;
2446                 }
2447                 if (signal_pending(current)) {
2448                         err = -ERESTARTSYS;
2449                         break;
2450                 }
2451         }
2452         remove_wait_queue(&pcm->open_wait, &wait);
2453         mutex_unlock(&pcm->open_mutex);
2454         if (err < 0)
2455                 goto __error;
2456         snd_card_unref(pcm->card);
2457         return err;
2458
2459       __error:
2460         module_put(pcm->card->module);
2461       __error2:
2462         snd_card_file_remove(pcm->card, file);
2463       __error1:
2464         if (pcm)
2465                 snd_card_unref(pcm->card);
2466         return err;
2467 }
2468
2469 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2470 {
2471         struct snd_pcm *pcm;
2472         struct snd_pcm_substream *substream;
2473         struct snd_pcm_oss_file *pcm_oss_file;
2474
2475         pcm_oss_file = file->private_data;
2476         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2477         if (substream == NULL)
2478                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2479         if (snd_BUG_ON(!substream))
2480                 return -ENXIO;
2481         pcm = substream->pcm;
2482         if (!pcm->card->shutdown)
2483                 snd_pcm_oss_sync(pcm_oss_file);
2484         mutex_lock(&pcm->open_mutex);
2485         snd_pcm_oss_release_file(pcm_oss_file);
2486         mutex_unlock(&pcm->open_mutex);
2487         wake_up(&pcm->open_wait);
2488         module_put(pcm->card->module);
2489         snd_card_file_remove(pcm->card, file);
2490         return 0;
2491 }
2492
2493 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2494 {
2495         struct snd_pcm_oss_file *pcm_oss_file;
2496         int __user *p = (int __user *)arg;
2497         int res;
2498
2499         pcm_oss_file = file->private_data;
2500         if (cmd == OSS_GETVERSION)
2501                 return put_user(SNDRV_OSS_VERSION, p);
2502         if (cmd == OSS_ALSAEMULVER)
2503                 return put_user(1, p);
2504 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2505         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2506                 struct snd_pcm_substream *substream;
2507                 int idx;
2508                 for (idx = 0; idx < 2; ++idx) {
2509                         substream = pcm_oss_file->streams[idx];
2510                         if (substream != NULL)
2511                                 break;
2512                 }
2513                 if (snd_BUG_ON(idx >= 2))
2514                         return -ENXIO;
2515                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2516         }
2517 #endif
2518         if (((cmd >> 8) & 0xff) != 'P')
2519                 return -EINVAL;
2520 #ifdef OSS_DEBUG
2521         pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2522 #endif
2523         switch (cmd) {
2524         case SNDCTL_DSP_RESET:
2525                 return snd_pcm_oss_reset(pcm_oss_file);
2526         case SNDCTL_DSP_SYNC:
2527                 return snd_pcm_oss_sync(pcm_oss_file);
2528         case SNDCTL_DSP_SPEED:
2529                 if (get_user(res, p))
2530                         return -EFAULT;
2531                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2532                         return res;
2533                 return put_user(res, p);
2534         case SOUND_PCM_READ_RATE:
2535                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2536                 if (res < 0)
2537                         return res;
2538                 return put_user(res, p);
2539         case SNDCTL_DSP_STEREO:
2540                 if (get_user(res, p))
2541                         return -EFAULT;
2542                 res = res > 0 ? 2 : 1;
2543                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2544                         return res;
2545                 return put_user(--res, p);
2546         case SNDCTL_DSP_GETBLKSIZE:
2547                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2548                 if (res < 0)
2549                         return res;
2550                 return put_user(res, p);
2551         case SNDCTL_DSP_SETFMT:
2552                 if (get_user(res, p))
2553                         return -EFAULT;
2554                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2555                 if (res < 0)
2556                         return res;
2557                 return put_user(res, p);
2558         case SOUND_PCM_READ_BITS:
2559                 res = snd_pcm_oss_get_format(pcm_oss_file);
2560                 if (res < 0)
2561                         return res;
2562                 return put_user(res, p);
2563         case SNDCTL_DSP_CHANNELS:
2564                 if (get_user(res, p))
2565                         return -EFAULT;
2566                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2567                 if (res < 0)
2568                         return res;
2569                 return put_user(res, p);
2570         case SOUND_PCM_READ_CHANNELS:
2571                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2572                 if (res < 0)
2573                         return res;
2574                 return put_user(res, p);
2575         case SOUND_PCM_WRITE_FILTER:
2576         case SOUND_PCM_READ_FILTER:
2577                 return -EIO;
2578         case SNDCTL_DSP_POST:
2579                 return snd_pcm_oss_post(pcm_oss_file);
2580         case SNDCTL_DSP_SUBDIVIDE:
2581                 if (get_user(res, p))
2582                         return -EFAULT;
2583                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2584                 if (res < 0)
2585                         return res;
2586                 return put_user(res, p);
2587         case SNDCTL_DSP_SETFRAGMENT:
2588                 if (get_user(res, p))
2589                         return -EFAULT;
2590                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2591         case SNDCTL_DSP_GETFMTS:
2592                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2593                 if (res < 0)
2594                         return res;
2595                 return put_user(res, p);
2596         case SNDCTL_DSP_GETOSPACE:
2597         case SNDCTL_DSP_GETISPACE:
2598                 return snd_pcm_oss_get_space(pcm_oss_file,
2599                         cmd == SNDCTL_DSP_GETISPACE ?
2600                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2601                         (struct audio_buf_info __user *) arg);
2602         case SNDCTL_DSP_NONBLOCK:
2603                 return snd_pcm_oss_nonblock(file);
2604         case SNDCTL_DSP_GETCAPS:
2605                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2606                 if (res < 0)
2607                         return res;
2608                 return put_user(res, p);
2609         case SNDCTL_DSP_GETTRIGGER:
2610                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2611                 if (res < 0)
2612                         return res;
2613                 return put_user(res, p);
2614         case SNDCTL_DSP_SETTRIGGER:
2615                 if (get_user(res, p))
2616                         return -EFAULT;
2617                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2618         case SNDCTL_DSP_GETIPTR:
2619         case SNDCTL_DSP_GETOPTR:
2620                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2621                         cmd == SNDCTL_DSP_GETIPTR ?
2622                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2623                         (struct count_info __user *) arg);
2624         case SNDCTL_DSP_MAPINBUF:
2625         case SNDCTL_DSP_MAPOUTBUF:
2626                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2627                         cmd == SNDCTL_DSP_MAPINBUF ?
2628                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2629                         (struct buffmem_desc __user *) arg);
2630         case SNDCTL_DSP_SETSYNCRO:
2631                 /* stop DMA now.. */
2632                 return 0;
2633         case SNDCTL_DSP_SETDUPLEX:
2634                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2635                         return 0;
2636                 return -EIO;
2637         case SNDCTL_DSP_GETODELAY:
2638                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2639                 if (res < 0) {
2640                         /* it's for sure, some broken apps don't check for error codes */
2641                         put_user(0, p);
2642                         return res;
2643                 }
2644                 return put_user(res, p);
2645         case SNDCTL_DSP_PROFILE:
2646                 return 0;       /* silently ignore */
2647         default:
2648                 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2649         }
2650         return -EINVAL;
2651 }
2652
2653 #ifdef CONFIG_COMPAT
2654 /* all compatible */
2655 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2656 #else
2657 #define snd_pcm_oss_ioctl_compat        NULL
2658 #endif
2659
2660 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2661 {
2662         struct snd_pcm_oss_file *pcm_oss_file;
2663         struct snd_pcm_substream *substream;
2664
2665         pcm_oss_file = file->private_data;
2666         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2667         if (substream == NULL)
2668                 return -ENXIO;
2669         substream->f_flags = file->f_flags & O_NONBLOCK;
2670 #ifndef OSS_DEBUG
2671         return snd_pcm_oss_read1(substream, buf, count);
2672 #else
2673         {
2674                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2675                 pcm_dbg(substream->pcm,
2676                         "pcm_oss: read %li bytes (returned %li bytes)\n",
2677                         (long)count, (long)res);
2678                 return res;
2679         }
2680 #endif
2681 }
2682
2683 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2684 {
2685         struct snd_pcm_oss_file *pcm_oss_file;
2686         struct snd_pcm_substream *substream;
2687         long result;
2688
2689         pcm_oss_file = file->private_data;
2690         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2691         if (substream == NULL)
2692                 return -ENXIO;
2693         substream->f_flags = file->f_flags & O_NONBLOCK;
2694         result = snd_pcm_oss_write1(substream, buf, count);
2695 #ifdef OSS_DEBUG
2696         pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2697                (long)count, (long)result);
2698 #endif
2699         return result;
2700 }
2701
2702 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2703 {
2704         struct snd_pcm_runtime *runtime = substream->runtime;
2705         if (atomic_read(&substream->mmap_count))
2706                 return runtime->oss.prev_hw_ptr_period !=
2707                                                 get_hw_ptr_period(runtime);
2708         else
2709                 return snd_pcm_playback_avail(runtime) >=
2710                                                 runtime->oss.period_frames;
2711 }
2712
2713 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2714 {
2715         struct snd_pcm_runtime *runtime = substream->runtime;
2716         if (atomic_read(&substream->mmap_count))
2717                 return runtime->oss.prev_hw_ptr_period !=
2718                                                 get_hw_ptr_period(runtime);
2719         else
2720                 return snd_pcm_capture_avail(runtime) >=
2721                                                 runtime->oss.period_frames;
2722 }
2723
2724 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2725 {
2726         struct snd_pcm_oss_file *pcm_oss_file;
2727         unsigned int mask;
2728         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2729
2730         pcm_oss_file = file->private_data;
2731
2732         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2733         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2734
2735         mask = 0;
2736         if (psubstream != NULL) {
2737                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2738                 poll_wait(file, &runtime->sleep, wait);
2739                 snd_pcm_stream_lock_irq(psubstream);
2740                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2741                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2742                      snd_pcm_oss_playback_ready(psubstream)))
2743                         mask |= POLLOUT | POLLWRNORM;
2744                 snd_pcm_stream_unlock_irq(psubstream);
2745         }
2746         if (csubstream != NULL) {
2747                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2748                 snd_pcm_state_t ostate;
2749                 poll_wait(file, &runtime->sleep, wait);
2750                 snd_pcm_stream_lock_irq(csubstream);
2751                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2752                     snd_pcm_oss_capture_ready(csubstream))
2753                         mask |= POLLIN | POLLRDNORM;
2754                 snd_pcm_stream_unlock_irq(csubstream);
2755                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2756                         struct snd_pcm_oss_file ofile;
2757                         memset(&ofile, 0, sizeof(ofile));
2758                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2759                         runtime->oss.trigger = 0;
2760                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2761                 }
2762         }
2763
2764         return mask;
2765 }
2766
2767 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2768 {
2769         struct snd_pcm_oss_file *pcm_oss_file;
2770         struct snd_pcm_substream *substream = NULL;
2771         struct snd_pcm_runtime *runtime;
2772         int err;
2773
2774 #ifdef OSS_DEBUG
2775         pr_debug("pcm_oss: mmap begin\n");
2776 #endif
2777         pcm_oss_file = file->private_data;
2778         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2779         case VM_READ | VM_WRITE:
2780                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2781                 if (substream)
2782                         break;
2783                 /* Fall through */
2784         case VM_READ:
2785                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2786                 break;
2787         case VM_WRITE:
2788                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2789                 break;
2790         default:
2791                 return -EINVAL;
2792         }
2793         /* set VM_READ access as well to fix memset() routines that do
2794            reads before writes (to improve performance) */
2795         area->vm_flags |= VM_READ;
2796         if (substream == NULL)
2797                 return -ENXIO;
2798         runtime = substream->runtime;
2799         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2800                 return -EIO;
2801         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2802                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2803         else
2804                 return -EIO;
2805
2806         if (runtime->oss.params) {
2807                 /* use mutex_trylock() for params_lock for avoiding a deadlock
2808                  * between mmap_sem and params_lock taken by
2809                  * copy_from/to_user() in snd_pcm_oss_write/read()
2810                  */
2811                 err = snd_pcm_oss_change_params(substream, true);
2812                 if (err < 0)
2813                         return err;
2814         }
2815 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2816         if (runtime->oss.plugin_first != NULL)
2817                 return -EIO;
2818 #endif
2819
2820         if (area->vm_pgoff != 0)
2821                 return -EINVAL;
2822
2823         err = snd_pcm_mmap_data(substream, file, area);
2824         if (err < 0)
2825                 return err;
2826         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2827         runtime->silence_threshold = 0;
2828         runtime->silence_size = 0;
2829 #ifdef OSS_DEBUG
2830         pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2831                runtime->oss.mmap_bytes);
2832 #endif
2833         /* In mmap mode we never stop */
2834         runtime->stop_threshold = runtime->boundary;
2835
2836         return 0;
2837 }
2838
2839 #ifdef CONFIG_SND_VERBOSE_PROCFS
2840 /*
2841  *  /proc interface
2842  */
2843
2844 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2845                                   struct snd_info_buffer *buffer)
2846 {
2847         struct snd_pcm_str *pstr = entry->private_data;
2848         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2849         mutex_lock(&pstr->oss.setup_mutex);
2850         while (setup) {
2851                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2852                             setup->task_name,
2853                             setup->periods,
2854                             setup->period_size,
2855                             setup->disable ? " disable" : "",
2856                             setup->direct ? " direct" : "",
2857                             setup->block ? " block" : "",
2858                             setup->nonblock ? " non-block" : "",
2859                             setup->partialfrag ? " partial-frag" : "",
2860                             setup->nosilence ? " no-silence" : "");
2861                 setup = setup->next;
2862         }
2863         mutex_unlock(&pstr->oss.setup_mutex);
2864 }
2865
2866 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2867 {
2868         struct snd_pcm_oss_setup *setup, *setupn;
2869
2870         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2871              setup; setup = setupn) {
2872                 setupn = setup->next;
2873                 kfree(setup->task_name);
2874                 kfree(setup);
2875         }
2876         pstr->oss.setup_list = NULL;
2877 }
2878
2879 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2880                                    struct snd_info_buffer *buffer)
2881 {
2882         struct snd_pcm_str *pstr = entry->private_data;
2883         char line[128], str[32], task_name[32];
2884         const char *ptr;
2885         int idx1;
2886         struct snd_pcm_oss_setup *setup, *setup1, template;
2887
2888         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2889                 mutex_lock(&pstr->oss.setup_mutex);
2890                 memset(&template, 0, sizeof(template));
2891                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2892                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2893                         snd_pcm_oss_proc_free_setup_list(pstr);
2894                         mutex_unlock(&pstr->oss.setup_mutex);
2895                         continue;
2896                 }
2897                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2898                         if (!strcmp(setup->task_name, task_name)) {
2899                                 template = *setup;
2900                                 break;
2901                         }
2902                 }
2903                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2904                 template.periods = simple_strtoul(str, NULL, 10);
2905                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2906                 template.period_size = simple_strtoul(str, NULL, 10);
2907                 for (idx1 = 31; idx1 >= 0; idx1--)
2908                         if (template.period_size & (1 << idx1))
2909                                 break;
2910                 for (idx1--; idx1 >= 0; idx1--)
2911                         template.period_size &= ~(1 << idx1);
2912                 do {
2913                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2914                         if (!strcmp(str, "disable")) {
2915                                 template.disable = 1;
2916                         } else if (!strcmp(str, "direct")) {
2917                                 template.direct = 1;
2918                         } else if (!strcmp(str, "block")) {
2919                                 template.block = 1;
2920                         } else if (!strcmp(str, "non-block")) {
2921                                 template.nonblock = 1;
2922                         } else if (!strcmp(str, "partial-frag")) {
2923                                 template.partialfrag = 1;
2924                         } else if (!strcmp(str, "no-silence")) {
2925                                 template.nosilence = 1;
2926                         } else if (!strcmp(str, "buggy-ptr")) {
2927                                 template.buggyptr = 1;
2928                         }
2929                 } while (*str);
2930                 if (setup == NULL) {
2931                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2932                         if (! setup) {
2933                                 buffer->error = -ENOMEM;
2934                                 mutex_unlock(&pstr->oss.setup_mutex);
2935                                 return;
2936                         }
2937                         if (pstr->oss.setup_list == NULL)
2938                                 pstr->oss.setup_list = setup;
2939                         else {
2940                                 for (setup1 = pstr->oss.setup_list;
2941                                      setup1->next; setup1 = setup1->next);
2942                                 setup1->next = setup;
2943                         }
2944                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2945                         if (! template.task_name) {
2946                                 kfree(setup);
2947                                 buffer->error = -ENOMEM;
2948                                 mutex_unlock(&pstr->oss.setup_mutex);
2949                                 return;
2950                         }
2951                 }
2952                 *setup = template;
2953                 mutex_unlock(&pstr->oss.setup_mutex);
2954         }
2955 }
2956
2957 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2958 {
2959         int stream;
2960         for (stream = 0; stream < 2; ++stream) {
2961                 struct snd_info_entry *entry;
2962                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2963                 if (pstr->substream_count == 0)
2964                         continue;
2965                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2966                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2967                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2968                         entry->c.text.read = snd_pcm_oss_proc_read;
2969                         entry->c.text.write = snd_pcm_oss_proc_write;
2970                         entry->private_data = pstr;
2971                         if (snd_info_register(entry) < 0) {
2972                                 snd_info_free_entry(entry);
2973                                 entry = NULL;
2974                         }
2975                 }
2976                 pstr->oss.proc_entry = entry;
2977         }
2978 }
2979
2980 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2981 {
2982         int stream;
2983         for (stream = 0; stream < 2; ++stream) {
2984                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2985                 snd_info_free_entry(pstr->oss.proc_entry);
2986                 pstr->oss.proc_entry = NULL;
2987                 snd_pcm_oss_proc_free_setup_list(pstr);
2988         }
2989 }
2990 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2991 #define snd_pcm_oss_proc_init(pcm)
2992 #define snd_pcm_oss_proc_done(pcm)
2993 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2994
2995 /*
2996  *  ENTRY functions
2997  */
2998
2999 static const struct file_operations snd_pcm_oss_f_reg =
3000 {
3001         .owner =        THIS_MODULE,
3002         .read =         snd_pcm_oss_read,
3003         .write =        snd_pcm_oss_write,
3004         .open =         snd_pcm_oss_open,
3005         .release =      snd_pcm_oss_release,
3006         .llseek =       no_llseek,
3007         .poll =         snd_pcm_oss_poll,
3008         .unlocked_ioctl =       snd_pcm_oss_ioctl,
3009         .compat_ioctl = snd_pcm_oss_ioctl_compat,
3010         .mmap =         snd_pcm_oss_mmap,
3011 };
3012
3013 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3014 {
3015         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3016                                     pcm->card, index, &snd_pcm_oss_f_reg,
3017                                     pcm) < 0) {
3018                 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3019                            pcm->card->number, pcm->device);
3020         }
3021 }
3022
3023 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3024 {
3025         pcm->oss.reg = 0;
3026         if (dsp_map[pcm->card->number] == (int)pcm->device) {
3027                 char name[128];
3028                 int duplex;
3029                 register_oss_dsp(pcm, 0);
3030                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3031                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3032                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3033                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3034 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3035                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3036                                       pcm->card->number,
3037                                       name);
3038 #endif
3039                 pcm->oss.reg++;
3040                 pcm->oss.reg_mask |= 1;
3041         }
3042         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3043                 register_oss_dsp(pcm, 1);
3044                 pcm->oss.reg++;
3045                 pcm->oss.reg_mask |= 2;
3046         }
3047
3048         if (pcm->oss.reg)
3049                 snd_pcm_oss_proc_init(pcm);
3050
3051         return 0;
3052 }
3053
3054 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3055 {
3056         if (pcm->oss.reg) {
3057                 if (pcm->oss.reg_mask & 1) {
3058                         pcm->oss.reg_mask &= ~1;
3059                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3060                                                   pcm->card, 0);
3061                 }
3062                 if (pcm->oss.reg_mask & 2) {
3063                         pcm->oss.reg_mask &= ~2;
3064                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3065                                                   pcm->card, 1);
3066                 }
3067                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3068 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3069                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3070 #endif
3071                 }
3072                 pcm->oss.reg = 0;
3073         }
3074         return 0;
3075 }
3076
3077 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3078 {
3079         snd_pcm_oss_disconnect_minor(pcm);
3080         snd_pcm_oss_proc_done(pcm);
3081         return 0;
3082 }
3083
3084 static struct snd_pcm_notify snd_pcm_oss_notify =
3085 {
3086         .n_register =   snd_pcm_oss_register_minor,
3087         .n_disconnect = snd_pcm_oss_disconnect_minor,
3088         .n_unregister = snd_pcm_oss_unregister_minor,
3089 };
3090
3091 static int __init alsa_pcm_oss_init(void)
3092 {
3093         int i;
3094         int err;
3095
3096         /* check device map table */
3097         for (i = 0; i < SNDRV_CARDS; i++) {
3098                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3099                         pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3100                                    i, dsp_map[i]);
3101                         dsp_map[i] = 0;
3102                 }
3103                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3104                         pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3105                                    i, adsp_map[i]);
3106                         adsp_map[i] = 1;
3107                 }
3108         }
3109         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3110                 return err;
3111         return 0;
3112 }
3113
3114 static void __exit alsa_pcm_oss_exit(void)
3115 {
3116         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3117 }
3118
3119 module_init(alsa_pcm_oss_init)
3120 module_exit(alsa_pcm_oss_exit)