sound/core/oss/pcm_oss.c

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