sound/core/oss/pcm_oss.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Digital Audio (PCM) abstract layer / OSS compatible
   4  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   5  */
   6
   7 #if 0
   8 #define PLUGIN_DEBUG
   9 #endif
  10 #if 0
  11 #define OSS_DEBUG
  12 #endif
  13
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/sched/signal.h>
  17 #include <linux/time.h>
  18 #include <linux/vmalloc.h>
  19 #include <linux/module.h>
  20 #include <linux/math64.h>
  21 #include <linux/string.h>
  22 #include <linux/compat.h>
  23 #include <sound/core.h>
  24 #include <sound/minors.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include "pcm_plugin.h"
  28 #include <sound/info.h>
  29 #include <linux/soundcard.h>
  30 #include <sound/initval.h>
  31 #include <sound/mixer_oss.h>
  32
  33 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  34
  35 static int dsp_map[SNDRV_CARDS];
  36 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  37 static bool nonblock_open = 1;
  38
  39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  40 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  41 MODULE_LICENSE("GPL");
  42 module_param_array(dsp_map, int, NULL, 0444);
  43 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  44 module_param_array(adsp_map, int, NULL, 0444);
  45 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  46 module_param(nonblock_open, bool, 0644);
  47 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  48 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  49 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  50
  51 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  52 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  53 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  54
  55 /*
  56  * helper functions to process hw_params
  57  */
  58 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
  59 {
  60         int changed = 0;
  61         if (i->min < min) {
  62                 i->min = min;
  63                 i->openmin = openmin;
  64                 changed = 1;
  65         } else if (i->min == min && !i->openmin && openmin) {
  66                 i->openmin = 1;
  67                 changed = 1;
  68         }
  69         if (i->integer) {
  70                 if (i->openmin) {
  71                         i->min++;
  72                         i->openmin = 0;
  73                 }
  74         }
  75         if (snd_interval_checkempty(i)) {
  76                 snd_interval_none(i);
  77                 return -EINVAL;
  78         }
  79         return changed;
  80 }
  81
  82 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
  83 {
  84         int changed = 0;
  85         if (i->max > max) {
  86                 i->max = max;
  87                 i->openmax = openmax;
  88                 changed = 1;
  89         } else if (i->max == max && !i->openmax && openmax) {
  90                 i->openmax = 1;
  91                 changed = 1;
  92         }
  93         if (i->integer) {
  94                 if (i->openmax) {
  95                         i->max--;
  96                         i->openmax = 0;
  97                 }
  98         }
  99         if (snd_interval_checkempty(i)) {
 100                 snd_interval_none(i);
 101                 return -EINVAL;
 102         }
 103         return changed;
 104 }
 105
 106 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
 107 {
 108         struct snd_interval t;
 109         t.empty = 0;
 110         t.min = t.max = val;
 111         t.openmin = t.openmax = 0;
 112         t.integer = 1;
 113         return snd_interval_refine(i, &t);
 114 }
 115
 116 /**
 117  * snd_pcm_hw_param_value_min
 118  * @params: the hw_params instance
 119  * @var: parameter to retrieve
 120  * @dir: pointer to the direction (-1,0,1) or NULL
 121  *
 122  * Return the minimum value for field PAR.
 123  */
 124 static unsigned int
 125 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
 126                            snd_pcm_hw_param_t var, int *dir)
 127 {
 128         if (hw_is_mask(var)) {
 129                 if (dir)
 130                         *dir = 0;
 131                 return snd_mask_min(hw_param_mask_c(params, var));
 132         }
 133         if (hw_is_interval(var)) {
 134                 const struct snd_interval *i = hw_param_interval_c(params, var);
 135                 if (dir)
 136                         *dir = i->openmin;
 137                 return snd_interval_min(i);
 138         }
 139         return -EINVAL;
 140 }
 141
 142 /**
 143  * snd_pcm_hw_param_value_max
 144  * @params: the hw_params instance
 145  * @var: parameter to retrieve
 146  * @dir: pointer to the direction (-1,0,1) or NULL
 147  *
 148  * Return the maximum value for field PAR.
 149  */
 150 static unsigned int
 151 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 152                            snd_pcm_hw_param_t var, int *dir)
 153 {
 154         if (hw_is_mask(var)) {
 155                 if (dir)
 156                         *dir = 0;
 157                 return snd_mask_max(hw_param_mask_c(params, var));
 158         }
 159         if (hw_is_interval(var)) {
 160                 const struct snd_interval *i = hw_param_interval_c(params, var);
 161                 if (dir)
 162                         *dir = - (int) i->openmax;
 163                 return snd_interval_max(i);
 164         }
 165         return -EINVAL;
 166 }
 167
 168 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
 169                                   snd_pcm_hw_param_t var,
 170                                   const struct snd_mask *val)
 171 {
 172         int changed;
 173         changed = snd_mask_refine(hw_param_mask(params, var), val);
 174         if (changed > 0) {
 175                 params->cmask |= 1 << var;
 176                 params->rmask |= 1 << var;
 177         }
 178         return changed;
 179 }
 180
 181 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
 182                                  struct snd_pcm_hw_params *params,
 183                                  snd_pcm_hw_param_t var,
 184                                  const struct snd_mask *val)
 185 {
 186         int changed = _snd_pcm_hw_param_mask(params, var, val);
 187         if (changed < 0)
 188                 return changed;
 189         if (params->rmask) {
 190                 int err = snd_pcm_hw_refine(pcm, params);
 191                 if (err < 0)
 192                         return err;
 193         }
 194         return 0;
 195 }
 196
 197 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
 198                                  snd_pcm_hw_param_t var, unsigned int val,
 199                                  int dir)
 200 {
 201         int changed;
 202         int open = 0;
 203         if (dir) {
 204                 if (dir > 0) {
 205                         open = 1;
 206                 } else if (dir < 0) {
 207                         if (val > 0) {
 208                                 open = 1;
 209                                 val--;
 210                         }
 211                 }
 212         }
 213         if (hw_is_mask(var))
 214                 changed = snd_mask_refine_min(hw_param_mask(params, var),
 215                                               val + !!open);
 216         else if (hw_is_interval(var))
 217                 changed = snd_interval_refine_min(hw_param_interval(params, var),
 218                                                   val, open);
 219         else
 220                 return -EINVAL;
 221         if (changed > 0) {
 222                 params->cmask |= 1 << var;
 223                 params->rmask |= 1 << var;
 224         }
 225         return changed;
 226 }
 227
 228 /**
 229  * snd_pcm_hw_param_min
 230  * @pcm: PCM instance
 231  * @params: the hw_params instance
 232  * @var: parameter to retrieve
 233  * @val: minimal value
 234  * @dir: pointer to the direction (-1,0,1) or NULL
 235  *
 236  * Inside configuration space defined by PARAMS remove from PAR all
 237  * values < VAL. Reduce configuration space accordingly.
 238  * Return new minimum or -EINVAL if the configuration space is empty
 239  */
 240 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
 241                                 struct snd_pcm_hw_params *params,
 242                                 snd_pcm_hw_param_t var, unsigned int val,
 243                                 int *dir)
 244 {
 245         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
 246         if (changed < 0)
 247                 return changed;
 248         if (params->rmask) {
 249                 int err = snd_pcm_hw_refine(pcm, params);
 250                 if (err < 0)
 251                         return err;
 252         }
 253         return snd_pcm_hw_param_value_min(params, var, dir);
 254 }
 255
 256 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
 257                                  snd_pcm_hw_param_t var, unsigned int val,
 258                                  int dir)
 259 {
 260         int changed;
 261         int open = 0;
 262         if (dir) {
 263                 if (dir < 0) {
 264                         open = 1;
 265                 } else if (dir > 0) {
 266                         open = 1;
 267                         val++;
 268                 }
 269         }
 270         if (hw_is_mask(var)) {
 271                 if (val == 0 && open) {
 272                         snd_mask_none(hw_param_mask(params, var));
 273                         changed = -EINVAL;
 274                 } else
 275                         changed = snd_mask_refine_max(hw_param_mask(params, var),
 276                                                       val - !!open);
 277         } else if (hw_is_interval(var))
 278                 changed = snd_interval_refine_max(hw_param_interval(params, var),
 279                                                   val, open);
 280         else
 281                 return -EINVAL;
 282         if (changed > 0) {
 283                 params->cmask |= 1 << var;
 284                 params->rmask |= 1 << var;
 285         }
 286         return changed;
 287 }
 288
 289 /**
 290  * snd_pcm_hw_param_max
 291  * @pcm: PCM instance
 292  * @params: the hw_params instance
 293  * @var: parameter to retrieve
 294  * @val: maximal value
 295  * @dir: pointer to the direction (-1,0,1) or NULL
 296  *
 297  * Inside configuration space defined by PARAMS remove from PAR all
 298  *  values >= VAL + 1. Reduce configuration space accordingly.
 299  *  Return new maximum or -EINVAL if the configuration space is empty
 300  */
 301 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
 302                                 struct snd_pcm_hw_params *params,
 303                                 snd_pcm_hw_param_t var, unsigned int val,
 304                                 int *dir)
 305 {
 306         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
 307         if (changed < 0)
 308                 return changed;
 309         if (params->rmask) {
 310                 int err = snd_pcm_hw_refine(pcm, params);
 311                 if (err < 0)
 312                         return err;
 313         }
 314         return snd_pcm_hw_param_value_max(params, var, dir);
 315 }
 316
 317 static int boundary_sub(int a, int adir,
 318                         int b, int bdir,
 319                         int *c, int *cdir)
 320 {
 321         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
 322         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
 323         *c = a - b;
 324         *cdir = adir - bdir;
 325         if (*cdir == -2) {
 326                 (*c)--;
 327         } else if (*cdir == 2) {
 328                 (*c)++;
 329         }
 330         return 0;
 331 }
 332
 333 static int boundary_lt(unsigned int a, int adir,
 334                        unsigned int b, int bdir)
 335 {
 336         if (adir < 0) {
 337                 a--;
 338                 adir = 1;
 339         } else if (adir > 0)
 340                 adir = 1;
 341         if (bdir < 0) {
 342                 b--;
 343                 bdir = 1;
 344         } else if (bdir > 0)
 345                 bdir = 1;
 346         return a < b || (a == b && adir < bdir);
 347 }
 348
 349 /* Return 1 if min is nearer to best than max */
 350 static int boundary_nearer(int min, int mindir,
 351                            int best, int bestdir,
 352                            int max, int maxdir)
 353 {
 354         int dmin, dmindir;
 355         int dmax, dmaxdir;
 356         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
 357         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
 358         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
 359 }
 360
 361 /**
 362  * snd_pcm_hw_param_near
 363  * @pcm: PCM instance
 364  * @params: the hw_params instance
 365  * @var: parameter to retrieve
 366  * @best: value to set
 367  * @dir: pointer to the direction (-1,0,1) or NULL
 368  *
 369  * Inside configuration space defined by PARAMS set PAR to the available value
 370  * nearest to VAL. Reduce configuration space accordingly.
 371  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
 372  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
 373  * Return the value found.
 374   */
 375 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
 376                                  struct snd_pcm_hw_params *params,
 377                                  snd_pcm_hw_param_t var, unsigned int best,
 378                                  int *dir)
 379 {
 380         struct snd_pcm_hw_params *save = NULL;
 381         int v;
 382         unsigned int saved_min;
 383         int last = 0;
 384         int min, max;
 385         int mindir, maxdir;
 386         int valdir = dir ? *dir : 0;
 387         /* FIXME */
 388         if (best > INT_MAX)
 389                 best = INT_MAX;
 390         min = max = best;
 391         mindir = maxdir = valdir;
 392         if (maxdir > 0)
 393                 maxdir = 0;
 394         else if (maxdir == 0)
 395                 maxdir = -1;
 396         else {
 397                 maxdir = 1;
 398                 max--;
 399         }
 400         save = kmalloc(sizeof(*save), GFP_KERNEL);
 401         if (save == NULL)
 402                 return -ENOMEM;
 403         *save = *params;
 404         saved_min = min;
 405         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
 406         if (min >= 0) {
 407                 struct snd_pcm_hw_params *params1;
 408                 if (max < 0)
 409                         goto _end;
 410                 if ((unsigned int)min == saved_min && mindir == valdir)
 411                         goto _end;
 412                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
 413                 if (params1 == NULL) {
 414                         kfree(save);
 415                         return -ENOMEM;
 416                 }
 417                 *params1 = *save;
 418                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
 419                 if (max < 0) {
 420                         kfree(params1);
 421                         goto _end;
 422                 }
 423                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
 424                         *params = *params1;
 425                         last = 1;
 426                 }
 427                 kfree(params1);
 428         } else {
 429                 *params = *save;
 430                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
 431                 if (max < 0) {
 432                         kfree(save);
 433                         return max;
 434                 }
 435                 last = 1;
 436         }
 437  _end:
 438         kfree(save);
 439         if (last)
 440                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
 441         else
 442                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
 443         return v;
 444 }
 445
 446 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
 447                                  snd_pcm_hw_param_t var, unsigned int val,
 448                                  int dir)
 449 {
 450         int changed;
 451         if (hw_is_mask(var)) {
 452                 struct snd_mask *m = hw_param_mask(params, var);
 453                 if (val == 0 && dir < 0) {
 454                         changed = -EINVAL;
 455                         snd_mask_none(m);
 456                 } else {
 457                         if (dir > 0)
 458                                 val++;
 459                         else if (dir < 0)
 460                                 val--;
 461                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
 462                 }
 463         } else if (hw_is_interval(var)) {
 464                 struct snd_interval *i = hw_param_interval(params, var);
 465                 if (val == 0 && dir < 0) {
 466                         changed = -EINVAL;
 467                         snd_interval_none(i);
 468                 } else if (dir == 0)
 469                         changed = snd_interval_refine_set(i, val);
 470                 else {
 471                         struct snd_interval t;
 472                         t.openmin = 1;
 473                         t.openmax = 1;
 474                         t.empty = 0;
 475                         t.integer = 0;
 476                         if (dir < 0) {
 477                                 t.min = val - 1;
 478                                 t.max = val;
 479                         } else {
 480                                 t.min = val;
 481                                 t.max = val+1;
 482                         }
 483                         changed = snd_interval_refine(i, &t);
 484                 }
 485         } else
 486                 return -EINVAL;
 487         if (changed > 0) {
 488                 params->cmask |= 1 << var;
 489                 params->rmask |= 1 << var;
 490         }
 491         return changed;
 492 }
 493
 494 /**
 495  * snd_pcm_hw_param_set
 496  * @pcm: PCM instance
 497  * @params: the hw_params instance
 498  * @var: parameter to retrieve
 499  * @val: value to set
 500  * @dir: pointer to the direction (-1,0,1) or NULL
 501  *
 502  * Inside configuration space defined by PARAMS remove from PAR all
 503  * values != VAL. Reduce configuration space accordingly.
 504  *  Return VAL or -EINVAL if the configuration space is empty
 505  */
 506 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
 507                                 struct snd_pcm_hw_params *params,
 508                                 snd_pcm_hw_param_t var, unsigned int val,
 509                                 int dir)
 510 {
 511         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
 512         if (changed < 0)
 513                 return changed;
 514         if (params->rmask) {
 515                 int err = snd_pcm_hw_refine(pcm, params);
 516                 if (err < 0)
 517                         return err;
 518         }
 519         return snd_pcm_hw_param_value(params, var, NULL);
 520 }
 521
 522 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
 523                                         snd_pcm_hw_param_t var)
 524 {
 525         int changed;
 526         changed = snd_interval_setinteger(hw_param_interval(params, var));
 527         if (changed > 0) {
 528                 params->cmask |= 1 << var;
 529                 params->rmask |= 1 << var;
 530         }
 531         return changed;
 532 }
 533
 534 /*
 535  * plugin
 536  */
 537
 538 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 539 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 540 {
 541         struct snd_pcm_runtime *runtime = substream->runtime;
 542         struct snd_pcm_plugin *plugin, *next;
 543
 544         plugin = runtime->oss.plugin_first;
 545         while (plugin) {
 546                 next = plugin->next;
 547                 snd_pcm_plugin_free(plugin);
 548                 plugin = next;
 549         }
 550         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
 551         return 0;
 552 }
 553
 554 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
 555 {
 556         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 557         plugin->next = runtime->oss.plugin_first;
 558         plugin->prev = NULL;
 559         if (runtime->oss.plugin_first) {
 560                 runtime->oss.plugin_first->prev = plugin;
 561                 runtime->oss.plugin_first = plugin;
 562         } else {
 563                 runtime->oss.plugin_last =
 564                 runtime->oss.plugin_first = plugin;
 565         }
 566         return 0;
 567 }
 568
 569 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 570 {
 571         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 572         plugin->next = NULL;
 573         plugin->prev = runtime->oss.plugin_last;
 574         if (runtime->oss.plugin_last) {
 575                 runtime->oss.plugin_last->next = plugin;
 576                 runtime->oss.plugin_last = plugin;
 577         } else {
 578                 runtime->oss.plugin_last =
 579                 runtime->oss.plugin_first = plugin;
 580         }
 581         return 0;
 582 }
 583 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 584
 585 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 586 {
 587         struct snd_pcm_runtime *runtime = substream->runtime;
 588         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 589         long bytes = frames_to_bytes(runtime, frames);
 590         if (buffer_size == runtime->oss.buffer_bytes)
 591                 return bytes;
 592 #if BITS_PER_LONG >= 64
 593         return runtime->oss.buffer_bytes * bytes / buffer_size;
 594 #else
 595         {
 596                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 597                 return div_u64(bsize, buffer_size);
 598         }
 599 #endif
 600 }
 601
 602 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 603 {
 604         struct snd_pcm_runtime *runtime = substream->runtime;
 605         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 606         if (buffer_size == runtime->oss.buffer_bytes)
 607                 return bytes_to_frames(runtime, bytes);
 608         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 609 }
 610
 611 static inline
 612 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
 613 {
 614         return runtime->hw_ptr_interrupt;
 615 }
 616
 617 /* define extended formats in the recent OSS versions (if any) */
 618 /* linear formats */
 619 #define AFMT_S32_LE      0x00001000
 620 #define AFMT_S32_BE      0x00002000
 621 #define AFMT_S24_LE      0x00008000
 622 #define AFMT_S24_BE      0x00010000
 623 #define AFMT_S24_PACKED  0x00040000
 624
 625 /* other supported formats */
 626 #define AFMT_FLOAT       0x00004000
 627 #define AFMT_SPDIF_RAW   0x00020000
 628
 629 /* unsupported formats */
 630 #define AFMT_AC3         0x00000400
 631 #define AFMT_VORBIS      0x00000800
 632
 633 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
 634 {
 635         switch (format) {
 636         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 637         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 638         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 639         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 640         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 641         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 642         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 643         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 644         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 645         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 646         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
 647         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
 648         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
 649         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
 650         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
 651         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
 652         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
 653         default:                return SNDRV_PCM_FORMAT_U8;
 654         }
 655 }
 656
 657 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
 658 {
 659         switch (format) {
 660         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 661         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 662         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 663         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 664         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 665         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 666         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 667         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 668         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 669         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 670         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
 671         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
 672         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
 673         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
 674         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
 675         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
 676         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
 677         default:                        return -EINVAL;
 678         }
 679 }
 680
 681 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 682                                    struct snd_pcm_hw_params *oss_params,
 683                                    struct snd_pcm_hw_params *slave_params)
 684 {
 685         size_t s;
 686         size_t oss_buffer_size, oss_period_size, oss_periods;
 687         size_t min_period_size, max_period_size;
 688         struct snd_pcm_runtime *runtime = substream->runtime;
 689         size_t oss_frame_size;
 690
 691         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 692                          params_channels(oss_params) / 8;
 693
 694         oss_buffer_size = snd_pcm_plug_client_size(substream,
 695                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 696         if (!oss_buffer_size)
 697                 return -EINVAL;
 698         oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
 699         if (atomic_read(&substream->mmap_count)) {
 700                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 701                         oss_buffer_size = runtime->oss.mmap_bytes;
 702         }
 703
 704         if (substream->oss.setup.period_size > 16)
 705                 oss_period_size = substream->oss.setup.period_size;
 706         else if (runtime->oss.fragshift) {
 707                 oss_period_size = 1 << runtime->oss.fragshift;
 708                 if (oss_period_size > oss_buffer_size / 2)
 709                         oss_period_size = oss_buffer_size / 2;
 710         } else {
 711                 int sd;
 712                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 713
 714                 oss_period_size = oss_buffer_size;
 715                 do {
 716                         oss_period_size /= 2;
 717                 } while (oss_period_size > bytes_per_sec);
 718                 if (runtime->oss.subdivision == 0) {
 719                         sd = 4;
 720                         if (oss_period_size / sd > 4096)
 721                                 sd *= 2;
 722                         if (oss_period_size / sd < 4096)
 723                                 sd = 1;
 724                 } else
 725                         sd = runtime->oss.subdivision;
 726                 oss_period_size /= sd;
 727                 if (oss_period_size < 16)
 728                         oss_period_size = 16;
 729         }
 730
 731         min_period_size = snd_pcm_plug_client_size(substream,
 732                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 733         if (min_period_size) {
 734                 min_period_size *= oss_frame_size;
 735                 min_period_size = roundup_pow_of_two(min_period_size);
 736                 if (oss_period_size < min_period_size)
 737                         oss_period_size = min_period_size;
 738         }
 739
 740         max_period_size = snd_pcm_plug_client_size(substream,
 741                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 742         if (max_period_size) {
 743                 max_period_size *= oss_frame_size;
 744                 max_period_size = rounddown_pow_of_two(max_period_size);
 745                 if (oss_period_size > max_period_size)
 746                         oss_period_size = max_period_size;
 747         }
 748
 749         oss_periods = oss_buffer_size / oss_period_size;
 750
 751         if (substream->oss.setup.periods > 1)
 752                 oss_periods = substream->oss.setup.periods;
 753
 754         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 755         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 756                 s = runtime->oss.maxfrags;
 757         if (oss_periods > s)
 758                 oss_periods = s;
 759
 760         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 761         if (s < 2)
 762                 s = 2;
 763         if (oss_periods < s)
 764                 oss_periods = s;
 765
 766         while (oss_period_size * oss_periods > oss_buffer_size)
 767                 oss_period_size /= 2;
 768
 769         if (oss_period_size < 16)
 770                 return -EINVAL;
 771         runtime->oss.period_bytes = oss_period_size;
 772         runtime->oss.period_frames = 1;
 773         runtime->oss.periods = oss_periods;
 774         return 0;
 775 }
 776
 777 static int choose_rate(struct snd_pcm_substream *substream,
 778                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 779 {
 780         const struct snd_interval *it;
 781         struct snd_pcm_hw_params *save;
 782         unsigned int rate, prev;
 783
 784         save = kmalloc(sizeof(*save), GFP_KERNEL);
 785         if (save == NULL)
 786                 return -ENOMEM;
 787         *save = *params;
 788         it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
 789
 790         /* try multiples of the best rate */
 791         rate = best_rate;
 792         for (;;) {
 793                 if (it->max < rate || (it->max == rate && it->openmax))
 794                         break;
 795                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 796                         int ret;
 797                         ret = snd_pcm_hw_param_set(substream, params,
 798                                                    SNDRV_PCM_HW_PARAM_RATE,
 799                                                    rate, 0);
 800                         if (ret == (int)rate) {
 801                                 kfree(save);
 802                                 return rate;
 803                         }
 804                         *params = *save;
 805                 }
 806                 prev = rate;
 807                 rate += best_rate;
 808                 if (rate <= prev)
 809                         break;
 810         }
 811
 812         /* not found, use the nearest rate */
 813         kfree(save);
 814         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 815 }
 816
 817 /* parameter locking: returns immediately if tried during streaming */
 818 static int lock_params(struct snd_pcm_runtime *runtime)
 819 {
 820         if (mutex_lock_interruptible(&runtime->oss.params_lock))
 821                 return -ERESTARTSYS;
 822         if (atomic_read(&runtime->oss.rw_ref)) {
 823                 mutex_unlock(&runtime->oss.params_lock);
 824                 return -EBUSY;
 825         }
 826         return 0;
 827 }
 828
 829 static void unlock_params(struct snd_pcm_runtime *runtime)
 830 {
 831         mutex_unlock(&runtime->oss.params_lock);
 832 }
 833
 834 /* call with params_lock held */
 835 static int snd_pcm_oss_change_params_locked(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         snd_pcm_format_t format, sformat;
 845         int n;
 846         const struct snd_mask *sformat_mask;
 847         struct snd_mask mask;
 848
 849         if (!runtime->oss.params)
 850                 return 0;
 851         sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
 852         params = kmalloc(sizeof(*params), GFP_KERNEL);
 853         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 854         if (!sw_params || !params || !sparams) {
 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, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 870         else {
 871                 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 872                 if (!direct)
 873                         snd_mask_set(&mask, (__force int)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                 pcm_dbg(substream->pcm, "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_c(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 ((__force int)sformat < 0 ||
 893             !snd_mask_test_format(sformat_mask, sformat)) {
 894                 pcm_for_each_format(sformat) {
 895                         if (snd_mask_test_format(sformat_mask, sformat) &&
 896                             snd_pcm_oss_format_to(sformat) >= 0)
 897                                 goto format_found;
 898                 }
 899                 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
 900                 err = -EINVAL;
 901                 goto failure;
 902         }
 903  format_found:
 904         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)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                                       (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 914                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 915                                       (__force int)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         err = snd_pcm_oss_period_size(substream, params, sparams);
 932         if (err < 0)
 933                 goto failure;
 934
 935         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 936         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 937         if (err < 0)
 938                 goto failure;
 939
 940         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 941                                      runtime->oss.periods, NULL);
 942         if (err < 0)
 943                 goto failure;
 944
 945         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 946
 947         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
 948         if (err < 0) {
 949                 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
 950                 goto failure;
 951         }
 952
 953 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 954         snd_pcm_oss_plugin_clear(substream);
 955         if (!direct) {
 956                 /* add necessary plugins */
 957                 snd_pcm_oss_plugin_clear(substream);
 958                 if ((err = snd_pcm_plug_format_plugins(substream,
 959                                                        params,
 960                                                        sparams)) < 0) {
 961                         pcm_dbg(substream->pcm,
 962                                 "snd_pcm_plug_format_plugins failed: %i\n", err);
 963                         snd_pcm_oss_plugin_clear(substream);
 964                         goto failure;
 965                 }
 966                 if (runtime->oss.plugin_first) {
 967                         struct snd_pcm_plugin *plugin;
 968                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 969                                 pcm_dbg(substream->pcm,
 970                                         "snd_pcm_plugin_build_io failed: %i\n", err);
 971                                 snd_pcm_oss_plugin_clear(substream);
 972                                 goto failure;
 973                         }
 974                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 975                                 err = snd_pcm_plugin_append(plugin);
 976                         } else {
 977                                 err = snd_pcm_plugin_insert(plugin);
 978                         }
 979                         if (err < 0) {
 980                                 snd_pcm_oss_plugin_clear(substream);
 981                                 goto failure;
 982                         }
 983                 }
 984         }
 985 #endif
 986
 987         if (runtime->oss.trigger) {
 988                 sw_params->start_threshold = 1;
 989         } else {
 990                 sw_params->start_threshold = runtime->boundary;
 991         }
 992         if (atomic_read(&substream->mmap_count) ||
 993             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 994                 sw_params->stop_threshold = runtime->boundary;
 995         else
 996                 sw_params->stop_threshold = runtime->buffer_size;
 997         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 998         sw_params->period_step = 1;
 999         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1000                 1 : runtime->period_size;
1001         if (atomic_read(&substream->mmap_count) ||
1002             substream->oss.setup.nosilence) {
1003                 sw_params->silence_threshold = 0;
1004                 sw_params->silence_size = 0;
1005         } else {
1006                 snd_pcm_uframes_t frames;
1007                 frames = runtime->period_size + 16;
1008                 if (frames > runtime->buffer_size)
1009                         frames = runtime->buffer_size;
1010                 sw_params->silence_threshold = frames;
1011                 sw_params->silence_size = frames;
1012         }
1013
1014         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1015                 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1016                 goto failure;
1017         }
1018
1019         runtime->oss.periods = params_periods(sparams);
1020         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1021         if (oss_period_size < 0) {
1022                 err = -EINVAL;
1023                 goto failure;
1024         }
1025 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1026         if (runtime->oss.plugin_first) {
1027                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1028                 if (err < 0)
1029                         goto failure;
1030         }
1031 #endif
1032         oss_period_size *= oss_frame_size;
1033
1034         oss_buffer_size = oss_period_size * runtime->oss.periods;
1035         if (oss_buffer_size < 0) {
1036                 err = -EINVAL;
1037                 goto failure;
1038         }
1039
1040         runtime->oss.period_bytes = oss_period_size;
1041         runtime->oss.buffer_bytes = oss_buffer_size;
1042
1043         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1044                  runtime->oss.period_bytes,
1045                  runtime->oss.buffer_bytes);
1046         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1047                  params_period_size(sparams),
1048                  params_buffer_size(sparams));
1049
1050         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1051         runtime->oss.channels = params_channels(params);
1052         runtime->oss.rate = params_rate(params);
1053
1054         kvfree(runtime->oss.buffer);
1055         runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1056         if (!runtime->oss.buffer) {
1057                 err = -ENOMEM;
1058                 goto failure;
1059         }
1060
1061         runtime->oss.params = 0;
1062         runtime->oss.prepare = 1;
1063         runtime->oss.buffer_used = 0;
1064         if (runtime->dma_area)
1065                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1066
1067         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1068
1069         err = 0;
1070 failure:
1071         kfree(sw_params);
1072         kfree(params);
1073         kfree(sparams);
1074         return err;
1075 }
1076
1077 /* this one takes the lock by itself */
1078 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1079                                      bool trylock)
1080 {
1081         struct snd_pcm_runtime *runtime = substream->runtime;
1082         int err;
1083
1084         if (trylock) {
1085                 if (!(mutex_trylock(&runtime->oss.params_lock)))
1086                         return -EAGAIN;
1087         } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1088                 return -ERESTARTSYS;
1089
1090         err = snd_pcm_oss_change_params_locked(substream);
1091         mutex_unlock(&runtime->oss.params_lock);
1092         return err;
1093 }
1094
1095 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1096 {
1097         int idx, err;
1098         struct snd_pcm_substream *asubstream = NULL, *substream;
1099
1100         for (idx = 0; idx < 2; idx++) {
1101                 substream = pcm_oss_file->streams[idx];
1102                 if (substream == NULL)
1103                         continue;
1104                 if (asubstream == NULL)
1105                         asubstream = substream;
1106                 if (substream->runtime->oss.params) {
1107                         err = snd_pcm_oss_change_params(substream, false);
1108                         if (err < 0)
1109                                 return err;
1110                 }
1111         }
1112         if (!asubstream)
1113                 return -EIO;
1114         if (r_substream)
1115                 *r_substream = asubstream;
1116         return 0;
1117 }
1118
1119 /* call with params_lock held */
1120 /* NOTE: this always call PREPARE unconditionally no matter whether
1121  * runtime->oss.prepare is set or not
1122  */
1123 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1124 {
1125         int err;
1126         struct snd_pcm_runtime *runtime = substream->runtime;
1127
1128         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1129         if (err < 0) {
1130                 pcm_dbg(substream->pcm,
1131                         "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1132                 return err;
1133         }
1134         runtime->oss.prepare = 0;
1135         runtime->oss.prev_hw_ptr_period = 0;
1136         runtime->oss.period_ptr = 0;
1137         runtime->oss.buffer_used = 0;
1138
1139         return 0;
1140 }
1141
1142 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1143 {
1144         struct snd_pcm_runtime *runtime;
1145         int err;
1146
1147         runtime = substream->runtime;
1148         if (runtime->oss.params) {
1149                 err = snd_pcm_oss_change_params(substream, false);
1150                 if (err < 0)
1151                         return err;
1152         }
1153         if (runtime->oss.prepare) {
1154                 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1155                         return -ERESTARTSYS;
1156                 err = snd_pcm_oss_prepare(substream);
1157                 mutex_unlock(&runtime->oss.params_lock);
1158                 if (err < 0)
1159                         return err;
1160         }
1161         return 0;
1162 }
1163
1164 /* call with params_lock held */
1165 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1166 {
1167         struct snd_pcm_runtime *runtime;
1168         int err;
1169
1170         runtime = substream->runtime;
1171         if (runtime->oss.params) {
1172                 err = snd_pcm_oss_change_params_locked(substream);
1173                 if (err < 0)
1174                         return err;
1175         }
1176         if (runtime->oss.prepare) {
1177                 err = snd_pcm_oss_prepare(substream);
1178                 if (err < 0)
1179                         return err;
1180         }
1181         return 0;
1182 }
1183
1184 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1185 {
1186         struct snd_pcm_runtime *runtime;
1187         snd_pcm_uframes_t frames;
1188         int err = 0;
1189
1190         while (1) {
1191                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1192                 if (err < 0)
1193                         break;
1194                 runtime = substream->runtime;
1195                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1196                         break;
1197                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1198                 /* until avail(delay) <= buffer_size */
1199                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1200                 frames /= runtime->period_size;
1201                 frames *= runtime->period_size;
1202                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1203                 if (err < 0)
1204                         break;
1205         }
1206         return err;
1207 }
1208
1209 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1210 {
1211         struct snd_pcm_runtime *runtime = substream->runtime;
1212         int ret;
1213         while (1) {
1214                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1215                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1216 #ifdef OSS_DEBUG
1217                         pcm_dbg(substream->pcm,
1218                                 "pcm_oss: write: recovering from %s\n",
1219                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1220                                 "XRUN" : "SUSPEND");
1221 #endif
1222                         ret = snd_pcm_oss_prepare(substream);
1223                         if (ret < 0)
1224                                 break;
1225                 }
1226                 mutex_unlock(&runtime->oss.params_lock);
1227                 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1228                                          frames, in_kernel);
1229                 mutex_lock(&runtime->oss.params_lock);
1230                 if (ret != -EPIPE && ret != -ESTRPIPE)
1231                         break;
1232                 /* test, if we can't store new data, because the stream */
1233                 /* has not been started */
1234                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1235                         return -EAGAIN;
1236         }
1237         return ret;
1238 }
1239
1240 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1241 {
1242         struct snd_pcm_runtime *runtime = substream->runtime;
1243         snd_pcm_sframes_t delay;
1244         int ret;
1245         while (1) {
1246                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1247                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1248 #ifdef OSS_DEBUG
1249                         pcm_dbg(substream->pcm,
1250                                 "pcm_oss: read: recovering from %s\n",
1251                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1252                                 "XRUN" : "SUSPEND");
1253 #endif
1254                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1255                         if (ret < 0)
1256                                 break;
1257                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1258                         ret = snd_pcm_oss_prepare(substream);
1259                         if (ret < 0)
1260                                 break;
1261                 }
1262                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1263                 if (ret < 0)
1264                         break;
1265                 mutex_unlock(&runtime->oss.params_lock);
1266                 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1267                                          frames, in_kernel);
1268                 mutex_lock(&runtime->oss.params_lock);
1269                 if (ret == -EPIPE) {
1270                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1271                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1272                                 if (ret < 0)
1273                                         break;
1274                         }
1275                         continue;
1276                 }
1277                 if (ret != -ESTRPIPE)
1278                         break;
1279         }
1280         return ret;
1281 }
1282
1283 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1284 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1285 {
1286         struct snd_pcm_runtime *runtime = substream->runtime;
1287         int ret;
1288         while (1) {
1289                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1290                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1291 #ifdef OSS_DEBUG
1292                         pcm_dbg(substream->pcm,
1293                                 "pcm_oss: writev: recovering from %s\n",
1294                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1295                                 "XRUN" : "SUSPEND");
1296 #endif
1297                         ret = snd_pcm_oss_prepare(substream);
1298                         if (ret < 0)
1299                                 break;
1300                 }
1301                 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1302                 if (ret != -EPIPE && ret != -ESTRPIPE)
1303                         break;
1304
1305                 /* test, if we can't store new data, because the stream */
1306                 /* has not been started */
1307                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1308                         return -EAGAIN;
1309         }
1310         return ret;
1311 }
1312
1313 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1314 {
1315         struct snd_pcm_runtime *runtime = substream->runtime;
1316         int ret;
1317         while (1) {
1318                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1319                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1320 #ifdef OSS_DEBUG
1321                         pcm_dbg(substream->pcm,
1322                                 "pcm_oss: readv: recovering from %s\n",
1323                                 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1324                                 "XRUN" : "SUSPEND");
1325 #endif
1326                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1327                         if (ret < 0)
1328                                 break;
1329                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1330                         ret = snd_pcm_oss_prepare(substream);
1331                         if (ret < 0)
1332                                 break;
1333                 }
1334                 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1335                 if (ret != -EPIPE && ret != -ESTRPIPE)
1336                         break;
1337         }
1338         return ret;
1339 }
1340 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1341
1342 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1343 {
1344         struct snd_pcm_runtime *runtime = substream->runtime;
1345         snd_pcm_sframes_t frames, frames1;
1346 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1347         if (runtime->oss.plugin_first) {
1348                 struct snd_pcm_plugin_channel *channels;
1349                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1350                 if (!in_kernel) {
1351                         if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1352                                 return -EFAULT;
1353                         buf = runtime->oss.buffer;
1354                 }
1355                 frames = bytes / oss_frame_bytes;
1356                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1357                 if (frames1 < 0)
1358                         return frames1;
1359                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1360                 if (frames1 <= 0)
1361                         return frames1;
1362                 bytes = frames1 * oss_frame_bytes;
1363         } else
1364 #endif
1365         {
1366                 frames = bytes_to_frames(runtime, bytes);
1367                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1368                 if (frames1 <= 0)
1369                         return frames1;
1370                 bytes = frames_to_bytes(runtime, frames1);
1371         }
1372         return bytes;
1373 }
1374
1375 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1376 {
1377         size_t xfer = 0;
1378         ssize_t tmp = 0;
1379         struct snd_pcm_runtime *runtime = substream->runtime;
1380
1381         if (atomic_read(&substream->mmap_count))
1382                 return -ENXIO;
1383
1384         atomic_inc(&runtime->oss.rw_ref);
1385         while (bytes > 0) {
1386                 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1387                         tmp = -ERESTARTSYS;
1388                         break;
1389                 }
1390                 tmp = snd_pcm_oss_make_ready_locked(substream);
1391                 if (tmp < 0)
1392                         goto err;
1393                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1394                         tmp = bytes;
1395                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1396                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1397                         if (tmp > 0) {
1398                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1399                                         tmp = -EFAULT;
1400                                         goto err;
1401                                 }
1402                         }
1403                         runtime->oss.buffer_used += tmp;
1404                         buf += tmp;
1405                         bytes -= tmp;
1406                         xfer += tmp;
1407                         if (substream->oss.setup.partialfrag ||
1408                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1409                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1410                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1411                                 if (tmp <= 0)
1412                                         goto err;
1413                                 runtime->oss.bytes += tmp;
1414                                 runtime->oss.period_ptr += tmp;
1415                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1416                                 if (runtime->oss.period_ptr == 0 ||
1417                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1418                                         runtime->oss.buffer_used = 0;
1419                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1420                                         tmp = -EAGAIN;
1421                                         goto err;
1422                                 }
1423                         }
1424                 } else {
1425                         tmp = snd_pcm_oss_write2(substream,
1426                                                  (const char __force *)buf,
1427                                                  runtime->oss.period_bytes, 0);
1428                         if (tmp <= 0)
1429                                 goto err;
1430                         runtime->oss.bytes += tmp;
1431                         buf += tmp;
1432                         bytes -= tmp;
1433                         xfer += tmp;
1434                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1435                             tmp != runtime->oss.period_bytes)
1436                                 tmp = -EAGAIN;
1437                 }
1438  err:
1439                 mutex_unlock(&runtime->oss.params_lock);
1440                 if (tmp < 0)
1441                         break;
1442                 if (signal_pending(current)) {
1443                         tmp = -ERESTARTSYS;
1444                         break;
1445                 }
1446                 tmp = 0;
1447         }
1448         atomic_dec(&runtime->oss.rw_ref);
1449         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1450 }
1451
1452 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1453 {
1454         struct snd_pcm_runtime *runtime = substream->runtime;
1455         snd_pcm_sframes_t frames, frames1;
1456 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1457         char __user *final_dst = (char __force __user *)buf;
1458         if (runtime->oss.plugin_first) {
1459                 struct snd_pcm_plugin_channel *channels;
1460                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1461                 if (!in_kernel)
1462                         buf = runtime->oss.buffer;
1463                 frames = bytes / oss_frame_bytes;
1464                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1465                 if (frames1 < 0)
1466                         return frames1;
1467                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1468                 if (frames1 <= 0)
1469                         return frames1;
1470                 bytes = frames1 * oss_frame_bytes;
1471                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1472                         return -EFAULT;
1473         } else
1474 #endif
1475         {
1476                 frames = bytes_to_frames(runtime, bytes);
1477                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1478                 if (frames1 <= 0)
1479                         return frames1;
1480                 bytes = frames_to_bytes(runtime, frames1);
1481         }
1482         return bytes;
1483 }
1484
1485 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1486 {
1487         size_t xfer = 0;
1488         ssize_t tmp = 0;
1489         struct snd_pcm_runtime *runtime = substream->runtime;
1490
1491         if (atomic_read(&substream->mmap_count))
1492                 return -ENXIO;
1493
1494         atomic_inc(&runtime->oss.rw_ref);
1495         while (bytes > 0) {
1496                 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1497                         tmp = -ERESTARTSYS;
1498                         break;
1499                 }
1500                 tmp = snd_pcm_oss_make_ready_locked(substream);
1501                 if (tmp < 0)
1502                         goto err;
1503                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1504                         if (runtime->oss.buffer_used == 0) {
1505                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1506                                 if (tmp <= 0)
1507                                         goto err;
1508                                 runtime->oss.bytes += tmp;
1509                                 runtime->oss.period_ptr = tmp;
1510                                 runtime->oss.buffer_used = tmp;
1511                         }
1512                         tmp = bytes;
1513                         if ((size_t) tmp > runtime->oss.buffer_used)
1514                                 tmp = runtime->oss.buffer_used;
1515                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1516                                 tmp = -EFAULT;
1517                                 goto err;
1518                         }
1519                         buf += tmp;
1520                         bytes -= tmp;
1521                         xfer += tmp;
1522                         runtime->oss.buffer_used -= tmp;
1523                 } else {
1524                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1525                                                 runtime->oss.period_bytes, 0);
1526                         if (tmp <= 0)
1527                                 goto err;
1528                         runtime->oss.bytes += tmp;
1529                         buf += tmp;
1530                         bytes -= tmp;
1531                         xfer += tmp;
1532                 }
1533  err:
1534                 mutex_unlock(&runtime->oss.params_lock);
1535                 if (tmp < 0)
1536                         break;
1537                 if (signal_pending(current)) {
1538                         tmp = -ERESTARTSYS;
1539                         break;
1540                 }
1541                 tmp = 0;
1542         }
1543         atomic_dec(&runtime->oss.rw_ref);
1544         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1545 }
1546
1547 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1548 {
1549         struct snd_pcm_substream *substream;
1550         struct snd_pcm_runtime *runtime;
1551         int i;
1552
1553         for (i = 0; i < 2; i++) {
1554                 substream = pcm_oss_file->streams[i];
1555                 if (!substream)
1556                         continue;
1557                 runtime = substream->runtime;
1558                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1559                 mutex_lock(&runtime->oss.params_lock);
1560                 runtime->oss.prepare = 1;
1561                 runtime->oss.buffer_used = 0;
1562                 runtime->oss.prev_hw_ptr_period = 0;
1563                 runtime->oss.period_ptr = 0;
1564                 mutex_unlock(&runtime->oss.params_lock);
1565         }
1566         return 0;
1567 }
1568
1569 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1570 {
1571         struct snd_pcm_substream *substream;
1572         int err;
1573
1574         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1575         if (substream != NULL) {
1576                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1577                         return err;
1578                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1579         }
1580         /* note: all errors from the start action are ignored */
1581         /* OSS apps do not know, how to handle them */
1582         return 0;
1583 }
1584
1585 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1586 {
1587         struct snd_pcm_runtime *runtime;
1588         ssize_t result = 0;
1589         snd_pcm_state_t state;
1590         long res;
1591         wait_queue_entry_t wait;
1592
1593         runtime = substream->runtime;
1594         init_waitqueue_entry(&wait, current);
1595         add_wait_queue(&runtime->sleep, &wait);
1596 #ifdef OSS_DEBUG
1597         pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1598 #endif
1599         while (1) {
1600                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1601                 if (result > 0) {
1602                         runtime->oss.buffer_used = 0;
1603                         result = 0;
1604                         break;
1605                 }
1606                 if (result != 0 && result != -EAGAIN)
1607                         break;
1608                 result = 0;
1609                 set_current_state(TASK_INTERRUPTIBLE);
1610                 snd_pcm_stream_lock_irq(substream);
1611                 state = runtime->status->state;
1612                 snd_pcm_stream_unlock_irq(substream);
1613                 if (state != SNDRV_PCM_STATE_RUNNING) {
1614                         set_current_state(TASK_RUNNING);
1615                         break;
1616                 }
1617                 res = schedule_timeout(10 * HZ);
1618                 if (signal_pending(current)) {
1619                         result = -ERESTARTSYS;
1620                         break;
1621                 }
1622                 if (res == 0) {
1623                         pcm_err(substream->pcm,
1624                                 "OSS sync error - DMA timeout\n");
1625                         result = -EIO;
1626                         break;
1627                 }
1628         }
1629         remove_wait_queue(&runtime->sleep, &wait);
1630         return result;
1631 }
1632
1633 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1634 {
1635         int err = 0;
1636         unsigned int saved_f_flags;
1637         struct snd_pcm_substream *substream;
1638         struct snd_pcm_runtime *runtime;
1639         snd_pcm_format_t format;
1640         unsigned long width;
1641         size_t size;
1642
1643         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1644         if (substream != NULL) {
1645                 runtime = substream->runtime;
1646                 if (atomic_read(&substream->mmap_count))
1647                         goto __direct;
1648                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1649                         return err;
1650                 atomic_inc(&runtime->oss.rw_ref);
1651                 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1652                         atomic_dec(&runtime->oss.rw_ref);
1653                         return -ERESTARTSYS;
1654                 }
1655                 format = snd_pcm_oss_format_from(runtime->oss.format);
1656                 width = snd_pcm_format_physical_width(format);
1657                 if (runtime->oss.buffer_used > 0) {
1658 #ifdef OSS_DEBUG
1659                         pcm_dbg(substream->pcm, "sync: buffer_used\n");
1660 #endif
1661                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1662                         snd_pcm_format_set_silence(format,
1663                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1664                                                    size);
1665                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1666                         if (err < 0)
1667                                 goto unlock;
1668                 } else if (runtime->oss.period_ptr > 0) {
1669 #ifdef OSS_DEBUG
1670                         pcm_dbg(substream->pcm, "sync: period_ptr\n");
1671 #endif
1672                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1673                         snd_pcm_format_set_silence(format,
1674                                                    runtime->oss.buffer,
1675                                                    size * 8 / width);
1676                         err = snd_pcm_oss_sync1(substream, size);
1677                         if (err < 0)
1678                                 goto unlock;
1679                 }
1680                 /*
1681                  * The ALSA's period might be a bit large than OSS one.
1682                  * Fill the remain portion of ALSA period with zeros.
1683                  */
1684                 size = runtime->control->appl_ptr % runtime->period_size;
1685                 if (size > 0) {
1686                         size = runtime->period_size - size;
1687                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1688                                 snd_pcm_lib_write(substream, NULL, size);
1689                         else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1690                                 snd_pcm_lib_writev(substream, NULL, size);
1691                 }
1692 unlock:
1693                 mutex_unlock(&runtime->oss.params_lock);
1694                 atomic_dec(&runtime->oss.rw_ref);
1695                 if (err < 0)
1696                         return err;
1697                 /*
1698                  * finish sync: drain the buffer
1699                  */
1700               __direct:
1701                 saved_f_flags = substream->f_flags;
1702                 substream->f_flags &= ~O_NONBLOCK;
1703                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1704                 substream->f_flags = saved_f_flags;
1705                 if (err < 0)
1706                         return err;
1707                 mutex_lock(&runtime->oss.params_lock);
1708                 runtime->oss.prepare = 1;
1709                 mutex_unlock(&runtime->oss.params_lock);
1710         }
1711
1712         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1713         if (substream != NULL) {
1714                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1715                         return err;
1716                 runtime = substream->runtime;
1717                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1718                 if (err < 0)
1719                         return err;
1720                 mutex_lock(&runtime->oss.params_lock);
1721                 runtime->oss.buffer_used = 0;
1722                 runtime->oss.prepare = 1;
1723                 mutex_unlock(&runtime->oss.params_lock);
1724         }
1725         return 0;
1726 }
1727
1728 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1729 {
1730         int idx;
1731
1732         for (idx = 1; idx >= 0; --idx) {
1733                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1734                 struct snd_pcm_runtime *runtime;
1735                 int err;
1736
1737                 if (substream == NULL)
1738                         continue;
1739                 runtime = substream->runtime;
1740                 if (rate < 1000)
1741                         rate = 1000;
1742                 else if (rate > 192000)
1743                         rate = 192000;
1744                 err = lock_params(runtime);
1745                 if (err < 0)
1746                         return err;
1747                 if (runtime->oss.rate != rate) {
1748                         runtime->oss.params = 1;
1749                         runtime->oss.rate = rate;
1750                 }
1751                 unlock_params(runtime);
1752         }
1753         return snd_pcm_oss_get_rate(pcm_oss_file);
1754 }
1755
1756 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1757 {
1758         struct snd_pcm_substream *substream;
1759         int err;
1760
1761         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762                 return err;
1763         return substream->runtime->oss.rate;
1764 }
1765
1766 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1767 {
1768         int idx;
1769         if (channels < 1)
1770                 channels = 1;
1771         if (channels > 128)
1772                 return -EINVAL;
1773         for (idx = 1; idx >= 0; --idx) {
1774                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1775                 struct snd_pcm_runtime *runtime;
1776                 int err;
1777
1778                 if (substream == NULL)
1779                         continue;
1780                 runtime = substream->runtime;
1781                 err = lock_params(runtime);
1782                 if (err < 0)
1783                         return err;
1784                 if (runtime->oss.channels != channels) {
1785                         runtime->oss.params = 1;
1786                         runtime->oss.channels = channels;
1787                 }
1788                 unlock_params(runtime);
1789         }
1790         return snd_pcm_oss_get_channels(pcm_oss_file);
1791 }
1792
1793 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1794 {
1795         struct snd_pcm_substream *substream;
1796         int err;
1797
1798         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1799                 return err;
1800         return substream->runtime->oss.channels;
1801 }
1802
1803 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1804 {
1805         struct snd_pcm_substream *substream;
1806         int err;
1807
1808         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1809                 return err;
1810         return substream->runtime->oss.period_bytes;
1811 }
1812
1813 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1814 {
1815         struct snd_pcm_substream *substream;
1816         int err;
1817         int direct;
1818         struct snd_pcm_hw_params *params;
1819         unsigned int formats = 0;
1820         const struct snd_mask *format_mask;
1821         int fmt;
1822
1823         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1824                 return err;
1825         if (atomic_read(&substream->mmap_count))
1826                 direct = 1;
1827         else
1828                 direct = substream->oss.setup.direct;
1829         if (!direct)
1830                 return AFMT_MU_LAW | AFMT_U8 |
1831                        AFMT_S16_LE | AFMT_S16_BE |
1832                        AFMT_S8 | AFMT_U16_LE |
1833                        AFMT_U16_BE |
1834                         AFMT_S32_LE | AFMT_S32_BE |
1835                         AFMT_S24_LE | AFMT_S24_BE |
1836                         AFMT_S24_PACKED;
1837         params = kmalloc(sizeof(*params), GFP_KERNEL);
1838         if (!params)
1839                 return -ENOMEM;
1840         _snd_pcm_hw_params_any(params);
1841         err = snd_pcm_hw_refine(substream, params);
1842         if (err < 0)
1843                 goto error;
1844         format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1845         for (fmt = 0; fmt < 32; ++fmt) {
1846                 if (snd_mask_test(format_mask, fmt)) {
1847                         int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1848                         if (f >= 0)
1849                                 formats |= f;
1850                 }
1851         }
1852
1853  error:
1854         kfree(params);
1855         return err < 0 ? err : formats;
1856 }
1857
1858 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1859 {
1860         int formats, idx;
1861         int err;
1862
1863         if (format != AFMT_QUERY) {
1864                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1865                 if (formats < 0)
1866                         return formats;
1867                 if (!(formats & format))
1868                         format = AFMT_U8;
1869                 for (idx = 1; idx >= 0; --idx) {
1870                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1871                         struct snd_pcm_runtime *runtime;
1872                         if (substream == NULL)
1873                                 continue;
1874                         runtime = substream->runtime;
1875                         err = lock_params(runtime);
1876                         if (err < 0)
1877                                 return err;
1878                         if (runtime->oss.format != format) {
1879                                 runtime->oss.params = 1;
1880                                 runtime->oss.format = format;
1881                         }
1882                         unlock_params(runtime);
1883                 }
1884         }
1885         return snd_pcm_oss_get_format(pcm_oss_file);
1886 }
1887
1888 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1889 {
1890         struct snd_pcm_substream *substream;
1891         int err;
1892
1893         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1894                 return err;
1895         return substream->runtime->oss.format;
1896 }
1897
1898 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1899 {
1900         struct snd_pcm_runtime *runtime;
1901
1902         runtime = substream->runtime;
1903         if (subdivide == 0) {
1904                 subdivide = runtime->oss.subdivision;
1905                 if (subdivide == 0)
1906                         subdivide = 1;
1907                 return subdivide;
1908         }
1909         if (runtime->oss.subdivision || runtime->oss.fragshift)
1910                 return -EINVAL;
1911         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1912             subdivide != 8 && subdivide != 16)
1913                 return -EINVAL;
1914         runtime->oss.subdivision = subdivide;
1915         runtime->oss.params = 1;
1916         return subdivide;
1917 }
1918
1919 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1920 {
1921         int err = -EINVAL, idx;
1922
1923         for (idx = 1; idx >= 0; --idx) {
1924                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1925                 struct snd_pcm_runtime *runtime;
1926
1927                 if (substream == NULL)
1928                         continue;
1929                 runtime = substream->runtime;
1930                 err = lock_params(runtime);
1931                 if (err < 0)
1932                         return err;
1933                 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1934                 unlock_params(runtime);
1935                 if (err < 0)
1936                         return err;
1937         }
1938         return err;
1939 }
1940
1941 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1942 {
1943         struct snd_pcm_runtime *runtime;
1944         int fragshift;
1945
1946         runtime = substream->runtime;
1947         if (runtime->oss.subdivision || runtime->oss.fragshift)
1948                 return -EINVAL;
1949         fragshift = val & 0xffff;
1950         if (fragshift >= 31)
1951                 return -EINVAL;
1952         runtime->oss.fragshift = fragshift;
1953         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1954         if (runtime->oss.fragshift < 4)         /* < 16 */
1955                 runtime->oss.fragshift = 4;
1956         if (runtime->oss.maxfrags < 2)
1957                 runtime->oss.maxfrags = 2;
1958         runtime->oss.params = 1;
1959         return 0;
1960 }
1961
1962 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1963 {
1964         int err = -EINVAL, idx;
1965
1966         for (idx = 1; idx >= 0; --idx) {
1967                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1968                 struct snd_pcm_runtime *runtime;
1969
1970                 if (substream == NULL)
1971                         continue;
1972                 runtime = substream->runtime;
1973                 err = lock_params(runtime);
1974                 if (err < 0)
1975                         return err;
1976                 err = snd_pcm_oss_set_fragment1(substream, val);
1977                 unlock_params(runtime);
1978                 if (err < 0)
1979                         return err;
1980         }
1981         return err;
1982 }
1983
1984 static int snd_pcm_oss_nonblock(struct file * file)
1985 {
1986         spin_lock(&file->f_lock);
1987         file->f_flags |= O_NONBLOCK;
1988         spin_unlock(&file->f_lock);
1989         return 0;
1990 }
1991
1992 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1993 {
1994
1995         if (substream == NULL) {
1996                 res &= ~DSP_CAP_DUPLEX;
1997                 return res;
1998         }
1999 #ifdef DSP_CAP_MULTI
2000         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2001                 if (substream->pstr->substream_count > 1)
2002                         res |= DSP_CAP_MULTI;
2003 #endif
2004         /* DSP_CAP_REALTIME is set all times: */
2005         /* all ALSA drivers can return actual pointer in ring buffer */
2006 #if defined(DSP_CAP_REALTIME) && 0
2007         {
2008                 struct snd_pcm_runtime *runtime = substream->runtime;
2009                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2010                         res &= ~DSP_CAP_REALTIME;
2011         }
2012 #endif
2013         return res;
2014 }
2015
2016 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2017 {
2018         int result, idx;
2019
2020         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2021         for (idx = 0; idx < 2; idx++) {
2022                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2023                 result = snd_pcm_oss_get_caps1(substream, result);
2024         }
2025         result |= 0x0001;       /* revision - same as SB AWE 64 */
2026         return result;
2027 }
2028
2029 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2030                                       snd_pcm_uframes_t hw_ptr)
2031 {
2032         struct snd_pcm_runtime *runtime = substream->runtime;
2033         snd_pcm_uframes_t appl_ptr;
2034         appl_ptr = hw_ptr + runtime->buffer_size;
2035         appl_ptr %= runtime->boundary;
2036         runtime->control->appl_ptr = appl_ptr;
2037 }
2038
2039 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2040 {
2041         struct snd_pcm_runtime *runtime;
2042         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2043         int err, cmd;
2044
2045 #ifdef OSS_DEBUG
2046         pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
2047 #endif
2048
2049         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2050         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2051
2052         if (psubstream) {
2053                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2054                         return err;
2055         }
2056         if (csubstream) {
2057                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2058                         return err;
2059         }
2060         if (psubstream) {
2061                 runtime = psubstream->runtime;
2062                 cmd = 0;
2063                 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2064                         return -ERESTARTSYS;
2065                 if (trigger & PCM_ENABLE_OUTPUT) {
2066                         if (runtime->oss.trigger)
2067                                 goto _skip1;
2068                         if (atomic_read(&psubstream->mmap_count))
2069                                 snd_pcm_oss_simulate_fill(psubstream,
2070                                                 get_hw_ptr_period(runtime));
2071                         runtime->oss.trigger = 1;
2072                         runtime->start_threshold = 1;
2073                         cmd = SNDRV_PCM_IOCTL_START;
2074                 } else {
2075                         if (!runtime->oss.trigger)
2076                                 goto _skip1;
2077                         runtime->oss.trigger = 0;
2078                         runtime->start_threshold = runtime->boundary;
2079                         cmd = SNDRV_PCM_IOCTL_DROP;
2080                         runtime->oss.prepare = 1;
2081                 }
2082  _skip1:
2083                 mutex_unlock(&runtime->oss.params_lock);
2084                 if (cmd) {
2085                         err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2086                         if (err < 0)
2087                                 return err;
2088                 }
2089         }
2090         if (csubstream) {
2091                 runtime = csubstream->runtime;
2092                 cmd = 0;
2093                 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2094                         return -ERESTARTSYS;
2095                 if (trigger & PCM_ENABLE_INPUT) {
2096                         if (runtime->oss.trigger)
2097                                 goto _skip2;
2098                         runtime->oss.trigger = 1;
2099                         runtime->start_threshold = 1;
2100                         cmd = SNDRV_PCM_IOCTL_START;
2101                 } else {
2102                         if (!runtime->oss.trigger)
2103                                 goto _skip2;
2104                         runtime->oss.trigger = 0;
2105                         runtime->start_threshold = runtime->boundary;
2106                         cmd = SNDRV_PCM_IOCTL_DROP;
2107                         runtime->oss.prepare = 1;
2108                 }
2109  _skip2:
2110                 mutex_unlock(&runtime->oss.params_lock);
2111                 if (cmd) {
2112                         err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2113                         if (err < 0)
2114                                 return err;
2115                 }
2116         }
2117         return 0;
2118 }
2119
2120 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2121 {
2122         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2123         int result = 0;
2124
2125         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2126         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2127         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2128                 result |= PCM_ENABLE_OUTPUT;
2129         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2130                 result |= PCM_ENABLE_INPUT;
2131         return result;
2132 }
2133
2134 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2135 {
2136         struct snd_pcm_substream *substream;
2137         struct snd_pcm_runtime *runtime;
2138         snd_pcm_sframes_t delay;
2139         int err;
2140
2141         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2142         if (substream == NULL)
2143                 return -EINVAL;
2144         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2145                 return err;
2146         runtime = substream->runtime;
2147         if (runtime->oss.params || runtime->oss.prepare)
2148                 return 0;
2149         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2150         if (err == -EPIPE)
2151                 delay = 0;      /* hack for broken OSS applications */
2152         else if (err < 0)
2153                 return err;
2154         return snd_pcm_oss_bytes(substream, delay);
2155 }
2156
2157 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2158 {
2159         struct snd_pcm_substream *substream;
2160         struct snd_pcm_runtime *runtime;
2161         snd_pcm_sframes_t delay;
2162         int fixup;
2163         struct count_info info;
2164         int err;
2165
2166         if (_info == NULL)
2167                 return -EFAULT;
2168         substream = pcm_oss_file->streams[stream];
2169         if (substream == NULL)
2170                 return -EINVAL;
2171         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2172                 return err;
2173         runtime = substream->runtime;
2174         if (runtime->oss.params || runtime->oss.prepare) {
2175                 memset(&info, 0, sizeof(info));
2176                 if (copy_to_user(_info, &info, sizeof(info)))
2177                         return -EFAULT;
2178                 return 0;
2179         }
2180         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2181                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2182                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2183                         err = 0;
2184                         delay = 0;
2185                         fixup = 0;
2186                 } else {
2187                         fixup = runtime->oss.buffer_used;
2188                 }
2189         } else {
2190                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2191                 fixup = -runtime->oss.buffer_used;
2192         }
2193         if (err < 0)
2194                 return err;
2195         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2196         if (atomic_read(&substream->mmap_count)) {
2197                 snd_pcm_sframes_t n;
2198                 delay = get_hw_ptr_period(runtime);
2199                 n = delay - runtime->oss.prev_hw_ptr_period;
2200                 if (n < 0)
2201                         n += runtime->boundary;
2202                 info.blocks = n / runtime->period_size;
2203                 runtime->oss.prev_hw_ptr_period = delay;
2204                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2205                         snd_pcm_oss_simulate_fill(substream, delay);
2206                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2207         } else {
2208                 delay = snd_pcm_oss_bytes(substream, delay);
2209                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2210                         if (substream->oss.setup.buggyptr)
2211                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2212                         else
2213                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2214                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2215                 } else {
2216                         delay += fixup;
2217                         info.blocks = delay / runtime->oss.period_bytes;
2218                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2219                 }
2220         }
2221         if (copy_to_user(_info, &info, sizeof(info)))
2222                 return -EFAULT;
2223         return 0;
2224 }
2225
2226 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2227 {
2228         struct snd_pcm_substream *substream;
2229         struct snd_pcm_runtime *runtime;
2230         snd_pcm_sframes_t avail;
2231         int fixup;
2232         struct audio_buf_info info;
2233         int err;
2234
2235         if (_info == NULL)
2236                 return -EFAULT;
2237         substream = pcm_oss_file->streams[stream];
2238         if (substream == NULL)
2239                 return -EINVAL;
2240         runtime = substream->runtime;
2241
2242         if (runtime->oss.params &&
2243             (err = snd_pcm_oss_change_params(substream, false)) < 0)
2244                 return err;
2245
2246         info.fragsize = runtime->oss.period_bytes;
2247         info.fragstotal = runtime->periods;
2248         if (runtime->oss.prepare) {
2249                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2250                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2251                         info.fragments = runtime->oss.periods;
2252                 } else {
2253                         info.bytes = 0;
2254                         info.fragments = 0;
2255                 }
2256         } else {
2257                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2258                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2259                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2260                                 avail = runtime->buffer_size;
2261                                 err = 0;
2262                                 fixup = 0;
2263                         } else {
2264                                 avail = runtime->buffer_size - avail;
2265                                 fixup = -runtime->oss.buffer_used;
2266                         }
2267                 } else {
2268                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2269                         fixup = runtime->oss.buffer_used;
2270                 }
2271                 if (err < 0)
2272                         return err;
2273                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2274                 info.fragments = info.bytes / runtime->oss.period_bytes;
2275         }
2276
2277 #ifdef OSS_DEBUG
2278         pcm_dbg(substream->pcm,
2279                 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2280                 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2281 #endif
2282         if (copy_to_user(_info, &info, sizeof(info)))
2283                 return -EFAULT;
2284         return 0;
2285 }
2286
2287 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2288 {
2289         // it won't be probably implemented
2290         // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2291         return -EINVAL;
2292 }
2293
2294 static const char *strip_task_path(const char *path)
2295 {
2296         const char *ptr, *ptrl = NULL;
2297         for (ptr = path; *ptr; ptr++) {
2298                 if (*ptr == '/')
2299                         ptrl = ptr + 1;
2300         }
2301         return ptrl;
2302 }
2303
2304 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2305                                       const char *task_name,
2306                                       struct snd_pcm_oss_setup *rsetup)
2307 {
2308         struct snd_pcm_oss_setup *setup;
2309
2310         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2311         do {
2312                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2313                      setup = setup->next) {
2314                         if (!strcmp(setup->task_name, task_name))
2315                                 goto out;
2316                 }
2317         } while ((task_name = strip_task_path(task_name)) != NULL);
2318  out:
2319         if (setup)
2320                 *rsetup = *setup;
2321         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2322 }
2323
2324 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2325 {
2326         struct snd_pcm_runtime *runtime;
2327         runtime = substream->runtime;
2328         kvfree(runtime->oss.buffer);
2329         runtime->oss.buffer = NULL;
2330 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2331         snd_pcm_oss_plugin_clear(substream);
2332 #endif
2333         substream->oss.oss = 0;
2334 }
2335
2336 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2337                                        struct snd_pcm_oss_setup *setup,
2338                                        int minor)
2339 {
2340         struct snd_pcm_runtime *runtime;
2341
2342         substream->oss.oss = 1;
2343         substream->oss.setup = *setup;
2344         if (setup->nonblock)
2345                 substream->f_flags |= O_NONBLOCK;
2346         else if (setup->block)
2347                 substream->f_flags &= ~O_NONBLOCK;
2348         runtime = substream->runtime;
2349         runtime->oss.params = 1;
2350         runtime->oss.trigger = 1;
2351         runtime->oss.rate = 8000;
2352         mutex_init(&runtime->oss.params_lock);
2353         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2354         case SNDRV_MINOR_OSS_PCM_8:
2355                 runtime->oss.format = AFMT_U8;
2356                 break;
2357         case SNDRV_MINOR_OSS_PCM_16:
2358                 runtime->oss.format = AFMT_S16_LE;
2359                 break;
2360         default:
2361                 runtime->oss.format = AFMT_MU_LAW;
2362         }
2363         runtime->oss.channels = 1;
2364         runtime->oss.fragshift = 0;
2365         runtime->oss.maxfrags = 0;
2366         runtime->oss.subdivision = 0;
2367         substream->pcm_release = snd_pcm_oss_release_substream;
2368         atomic_set(&runtime->oss.rw_ref, 0);
2369 }
2370
2371 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2372 {
2373         int cidx;
2374         if (!pcm_oss_file)
2375                 return 0;
2376         for (cidx = 0; cidx < 2; ++cidx) {
2377                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2378                 if (substream)
2379                         snd_pcm_release_substream(substream);
2380         }
2381         kfree(pcm_oss_file);
2382         return 0;
2383 }
2384
2385 static int snd_pcm_oss_open_file(struct file *file,
2386                                  struct snd_pcm *pcm,
2387                                  struct snd_pcm_oss_file **rpcm_oss_file,
2388                                  int minor,
2389                                  struct snd_pcm_oss_setup *setup)
2390 {
2391         int idx, err;
2392         struct snd_pcm_oss_file *pcm_oss_file;
2393         struct snd_pcm_substream *substream;
2394         fmode_t f_mode = file->f_mode;
2395
2396         if (rpcm_oss_file)
2397                 *rpcm_oss_file = NULL;
2398
2399         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2400         if (pcm_oss_file == NULL)
2401                 return -ENOMEM;
2402
2403         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2404             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2405                 f_mode = FMODE_WRITE;
2406
2407         file->f_flags &= ~O_APPEND;
2408         for (idx = 0; idx < 2; idx++) {
2409                 if (setup[idx].disable)
2410                         continue;
2411                 if (! pcm->streams[idx].substream_count)
2412                         continue; /* no matching substream */
2413                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2414                         if (! (f_mode & FMODE_WRITE))
2415                                 continue;
2416                 } else {
2417                         if (! (f_mode & FMODE_READ))
2418                                 continue;
2419                 }
2420                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2421                 if (err < 0) {
2422                         snd_pcm_oss_release_file(pcm_oss_file);
2423                         return err;
2424                 }
2425
2426                 pcm_oss_file->streams[idx] = substream;
2427                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2428         }
2429
2430         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2431                 snd_pcm_oss_release_file(pcm_oss_file);
2432                 return -EINVAL;
2433         }
2434
2435         file->private_data = pcm_oss_file;
2436         if (rpcm_oss_file)
2437                 *rpcm_oss_file = pcm_oss_file;
2438         return 0;
2439 }
2440
2441
2442 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2443 {
2444         unsigned int idx;
2445
2446         if (snd_BUG_ON(!task || !name || size < 2))
2447                 return -EINVAL;
2448         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2449                 name[idx] = task->comm[idx];
2450         name[idx] = '\0';
2451         return 0;
2452 }
2453
2454 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2455 {
2456         int err;
2457         char task_name[32];
2458         struct snd_pcm *pcm;
2459         struct snd_pcm_oss_file *pcm_oss_file;
2460         struct snd_pcm_oss_setup setup[2];
2461         int nonblock;
2462         wait_queue_entry_t wait;
2463
2464         err = nonseekable_open(inode, file);
2465         if (err < 0)
2466                 return err;
2467
2468         pcm = snd_lookup_oss_minor_data(iminor(inode),
2469                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2470         if (pcm == NULL) {
2471                 err = -ENODEV;
2472                 goto __error1;
2473         }
2474         err = snd_card_file_add(pcm->card, file);
2475         if (err < 0)
2476                 goto __error1;
2477         if (!try_module_get(pcm->card->module)) {
2478                 err = -EFAULT;
2479                 goto __error2;
2480         }
2481         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2482                 err = -EFAULT;
2483                 goto __error;
2484         }
2485         memset(setup, 0, sizeof(setup));
2486         if (file->f_mode & FMODE_WRITE)
2487                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2488                                            task_name, &setup[0]);
2489         if (file->f_mode & FMODE_READ)
2490                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2491                                            task_name, &setup[1]);
2492
2493         nonblock = !!(file->f_flags & O_NONBLOCK);
2494         if (!nonblock)
2495                 nonblock = nonblock_open;
2496
2497         init_waitqueue_entry(&wait, current);
2498         add_wait_queue(&pcm->open_wait, &wait);
2499         mutex_lock(&pcm->open_mutex);
2500         while (1) {
2501                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2502                                             iminor(inode), setup);
2503                 if (err >= 0)
2504                         break;
2505                 if (err == -EAGAIN) {
2506                         if (nonblock) {
2507                                 err = -EBUSY;
2508                                 break;
2509                         }
2510                 } else
2511                         break;
2512                 set_current_state(TASK_INTERRUPTIBLE);
2513                 mutex_unlock(&pcm->open_mutex);
2514                 schedule();
2515                 mutex_lock(&pcm->open_mutex);
2516                 if (pcm->card->shutdown) {
2517                         err = -ENODEV;
2518                         break;
2519                 }
2520                 if (signal_pending(current)) {
2521                         err = -ERESTARTSYS;
2522                         break;
2523                 }
2524         }
2525         remove_wait_queue(&pcm->open_wait, &wait);
2526         mutex_unlock(&pcm->open_mutex);
2527         if (err < 0)
2528                 goto __error;
2529         snd_card_unref(pcm->card);
2530         return err;
2531
2532       __error:
2533         module_put(pcm->card->module);
2534       __error2:
2535         snd_card_file_remove(pcm->card, file);
2536       __error1:
2537         if (pcm)
2538                 snd_card_unref(pcm->card);
2539         return err;
2540 }
2541
2542 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2543 {
2544         struct snd_pcm *pcm;
2545         struct snd_pcm_substream *substream;
2546         struct snd_pcm_oss_file *pcm_oss_file;
2547
2548         pcm_oss_file = file->private_data;
2549         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2550         if (substream == NULL)
2551                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2552         if (snd_BUG_ON(!substream))
2553                 return -ENXIO;
2554         pcm = substream->pcm;
2555         if (!pcm->card->shutdown)
2556                 snd_pcm_oss_sync(pcm_oss_file);
2557         mutex_lock(&pcm->open_mutex);
2558         snd_pcm_oss_release_file(pcm_oss_file);
2559         mutex_unlock(&pcm->open_mutex);
2560         wake_up(&pcm->open_wait);
2561         module_put(pcm->card->module);
2562         snd_card_file_remove(pcm->card, file);
2563         return 0;
2564 }
2565
2566 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2567 {
2568         struct snd_pcm_oss_file *pcm_oss_file;
2569         int __user *p = (int __user *)arg;
2570         int res;
2571
2572         pcm_oss_file = file->private_data;
2573         if (cmd == OSS_GETVERSION)
2574                 return put_user(SNDRV_OSS_VERSION, p);
2575         if (cmd == OSS_ALSAEMULVER)
2576                 return put_user(1, p);
2577 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2578         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2579                 struct snd_pcm_substream *substream;
2580                 int idx;
2581                 for (idx = 0; idx < 2; ++idx) {
2582                         substream = pcm_oss_file->streams[idx];
2583                         if (substream != NULL)
2584                                 break;
2585                 }
2586                 if (snd_BUG_ON(idx >= 2))
2587                         return -ENXIO;
2588                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2589         }
2590 #endif
2591         if (((cmd >> 8) & 0xff) != 'P')
2592                 return -EINVAL;
2593 #ifdef OSS_DEBUG
2594         pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2595 #endif
2596         switch (cmd) {
2597         case SNDCTL_DSP_RESET:
2598                 return snd_pcm_oss_reset(pcm_oss_file);
2599         case SNDCTL_DSP_SYNC:
2600                 return snd_pcm_oss_sync(pcm_oss_file);
2601         case SNDCTL_DSP_SPEED:
2602                 if (get_user(res, p))
2603                         return -EFAULT;
2604                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2605                         return res;
2606                 return put_user(res, p);
2607         case SOUND_PCM_READ_RATE:
2608                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2609                 if (res < 0)
2610                         return res;
2611                 return put_user(res, p);
2612         case SNDCTL_DSP_STEREO:
2613                 if (get_user(res, p))
2614                         return -EFAULT;
2615                 res = res > 0 ? 2 : 1;
2616                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2617                         return res;
2618                 return put_user(--res, p);
2619         case SNDCTL_DSP_GETBLKSIZE:
2620                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2621                 if (res < 0)
2622                         return res;
2623                 return put_user(res, p);
2624         case SNDCTL_DSP_SETFMT:
2625                 if (get_user(res, p))
2626                         return -EFAULT;
2627                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2628                 if (res < 0)
2629                         return res;
2630                 return put_user(res, p);
2631         case SOUND_PCM_READ_BITS:
2632                 res = snd_pcm_oss_get_format(pcm_oss_file);
2633                 if (res < 0)
2634                         return res;
2635                 return put_user(res, p);
2636         case SNDCTL_DSP_CHANNELS:
2637                 if (get_user(res, p))
2638                         return -EFAULT;
2639                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2640                 if (res < 0)
2641                         return res;
2642                 return put_user(res, p);
2643         case SOUND_PCM_READ_CHANNELS:
2644                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2645                 if (res < 0)
2646                         return res;
2647                 return put_user(res, p);
2648         case SOUND_PCM_WRITE_FILTER:
2649         case SOUND_PCM_READ_FILTER:
2650                 return -EIO;
2651         case SNDCTL_DSP_POST:
2652                 return snd_pcm_oss_post(pcm_oss_file);
2653         case SNDCTL_DSP_SUBDIVIDE:
2654                 if (get_user(res, p))
2655                         return -EFAULT;
2656                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2657                 if (res < 0)
2658                         return res;
2659                 return put_user(res, p);
2660         case SNDCTL_DSP_SETFRAGMENT:
2661                 if (get_user(res, p))
2662                         return -EFAULT;
2663                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2664         case SNDCTL_DSP_GETFMTS:
2665                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2666                 if (res < 0)
2667                         return res;
2668                 return put_user(res, p);
2669         case SNDCTL_DSP_GETOSPACE:
2670         case SNDCTL_DSP_GETISPACE:
2671                 return snd_pcm_oss_get_space(pcm_oss_file,
2672                         cmd == SNDCTL_DSP_GETISPACE ?
2673                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2674                         (struct audio_buf_info __user *) arg);
2675         case SNDCTL_DSP_NONBLOCK:
2676                 return snd_pcm_oss_nonblock(file);
2677         case SNDCTL_DSP_GETCAPS:
2678                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2679                 if (res < 0)
2680                         return res;
2681                 return put_user(res, p);
2682         case SNDCTL_DSP_GETTRIGGER:
2683                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2684                 if (res < 0)
2685                         return res;
2686                 return put_user(res, p);
2687         case SNDCTL_DSP_SETTRIGGER:
2688                 if (get_user(res, p))
2689                         return -EFAULT;
2690                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2691         case SNDCTL_DSP_GETIPTR:
2692         case SNDCTL_DSP_GETOPTR:
2693                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2694                         cmd == SNDCTL_DSP_GETIPTR ?
2695                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2696                         (struct count_info __user *) arg);
2697         case SNDCTL_DSP_MAPINBUF:
2698         case SNDCTL_DSP_MAPOUTBUF:
2699                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2700                         cmd == SNDCTL_DSP_MAPINBUF ?
2701                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2702                         (struct buffmem_desc __user *) arg);
2703         case SNDCTL_DSP_SETSYNCRO:
2704                 /* stop DMA now.. */
2705                 return 0;
2706         case SNDCTL_DSP_SETDUPLEX:
2707                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2708                         return 0;
2709                 return -EIO;
2710         case SNDCTL_DSP_GETODELAY:
2711                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2712                 if (res < 0) {
2713                         /* it's for sure, some broken apps don't check for error codes */
2714                         put_user(0, p);
2715                         return res;
2716                 }
2717                 return put_user(res, p);
2718         case SNDCTL_DSP_PROFILE:
2719                 return 0;       /* silently ignore */
2720         default:
2721                 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2722         }
2723         return -EINVAL;
2724 }
2725
2726 #ifdef CONFIG_COMPAT
2727 /* all compatible */
2728 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2729                                      unsigned long arg)
2730 {
2731         /*
2732          * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2733          * which are not implemented for the native case either
2734          */
2735         return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2736 }
2737 #else
2738 #define snd_pcm_oss_ioctl_compat        NULL
2739 #endif
2740
2741 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2742 {
2743         struct snd_pcm_oss_file *pcm_oss_file;
2744         struct snd_pcm_substream *substream;
2745
2746         pcm_oss_file = file->private_data;
2747         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2748         if (substream == NULL)
2749                 return -ENXIO;
2750         substream->f_flags = file->f_flags & O_NONBLOCK;
2751 #ifndef OSS_DEBUG
2752         return snd_pcm_oss_read1(substream, buf, count);
2753 #else
2754         {
2755                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2756                 pcm_dbg(substream->pcm,
2757                         "pcm_oss: read %li bytes (returned %li bytes)\n",
2758                         (long)count, (long)res);
2759                 return res;
2760         }
2761 #endif
2762 }
2763
2764 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2765 {
2766         struct snd_pcm_oss_file *pcm_oss_file;
2767         struct snd_pcm_substream *substream;
2768         long result;
2769
2770         pcm_oss_file = file->private_data;
2771         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2772         if (substream == NULL)
2773                 return -ENXIO;
2774         substream->f_flags = file->f_flags & O_NONBLOCK;
2775         result = snd_pcm_oss_write1(substream, buf, count);
2776 #ifdef OSS_DEBUG
2777         pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2778                (long)count, (long)result);
2779 #endif
2780         return result;
2781 }
2782
2783 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2784 {
2785         struct snd_pcm_runtime *runtime = substream->runtime;
2786         if (atomic_read(&substream->mmap_count))
2787                 return runtime->oss.prev_hw_ptr_period !=
2788                                                 get_hw_ptr_period(runtime);
2789         else
2790                 return snd_pcm_playback_avail(runtime) >=
2791                                                 runtime->oss.period_frames;
2792 }
2793
2794 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2795 {
2796         struct snd_pcm_runtime *runtime = substream->runtime;
2797         if (atomic_read(&substream->mmap_count))
2798                 return runtime->oss.prev_hw_ptr_period !=
2799                                                 get_hw_ptr_period(runtime);
2800         else
2801                 return snd_pcm_capture_avail(runtime) >=
2802                                                 runtime->oss.period_frames;
2803 }
2804
2805 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2806 {
2807         struct snd_pcm_oss_file *pcm_oss_file;
2808         __poll_t mask;
2809         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2810
2811         pcm_oss_file = file->private_data;
2812
2813         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2814         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2815
2816         mask = 0;
2817         if (psubstream != NULL) {
2818                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2819                 poll_wait(file, &runtime->sleep, wait);
2820                 snd_pcm_stream_lock_irq(psubstream);
2821                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2822                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2823                      snd_pcm_oss_playback_ready(psubstream)))
2824                         mask |= EPOLLOUT | EPOLLWRNORM;
2825                 snd_pcm_stream_unlock_irq(psubstream);
2826         }
2827         if (csubstream != NULL) {
2828                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2829                 snd_pcm_state_t ostate;
2830                 poll_wait(file, &runtime->sleep, wait);
2831                 snd_pcm_stream_lock_irq(csubstream);
2832                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2833                     snd_pcm_oss_capture_ready(csubstream))
2834                         mask |= EPOLLIN | EPOLLRDNORM;
2835                 snd_pcm_stream_unlock_irq(csubstream);
2836                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2837                         struct snd_pcm_oss_file ofile;
2838                         memset(&ofile, 0, sizeof(ofile));
2839                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2840                         runtime->oss.trigger = 0;
2841                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2842                 }
2843         }
2844
2845         return mask;
2846 }
2847
2848 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2849 {
2850         struct snd_pcm_oss_file *pcm_oss_file;
2851         struct snd_pcm_substream *substream = NULL;
2852         struct snd_pcm_runtime *runtime;
2853         int err;
2854
2855 #ifdef OSS_DEBUG
2856         pr_debug("pcm_oss: mmap begin\n");
2857 #endif
2858         pcm_oss_file = file->private_data;
2859         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2860         case VM_READ | VM_WRITE:
2861                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2862                 if (substream)
2863                         break;
2864                 fallthrough;
2865         case VM_READ:
2866                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2867                 break;
2868         case VM_WRITE:
2869                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2870                 break;
2871         default:
2872                 return -EINVAL;
2873         }
2874         /* set VM_READ access as well to fix memset() routines that do
2875            reads before writes (to improve performance) */
2876         area->vm_flags |= VM_READ;
2877         if (substream == NULL)
2878                 return -ENXIO;
2879         runtime = substream->runtime;
2880         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2881                 return -EIO;
2882         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2883                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2884         else
2885                 return -EIO;
2886
2887         if (runtime->oss.params) {
2888                 /* use mutex_trylock() for params_lock for avoiding a deadlock
2889                  * between mmap_lock and params_lock taken by
2890                  * copy_from/to_user() in snd_pcm_oss_write/read()
2891                  */
2892                 err = snd_pcm_oss_change_params(substream, true);
2893                 if (err < 0)
2894                         return err;
2895         }
2896 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2897         if (runtime->oss.plugin_first != NULL)
2898                 return -EIO;
2899 #endif
2900
2901         if (area->vm_pgoff != 0)
2902                 return -EINVAL;
2903
2904         err = snd_pcm_mmap_data(substream, file, area);
2905         if (err < 0)
2906                 return err;
2907         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2908         runtime->silence_threshold = 0;
2909         runtime->silence_size = 0;
2910 #ifdef OSS_DEBUG
2911         pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2912                runtime->oss.mmap_bytes);
2913 #endif
2914         /* In mmap mode we never stop */
2915         runtime->stop_threshold = runtime->boundary;
2916
2917         return 0;
2918 }
2919
2920 #ifdef CONFIG_SND_VERBOSE_PROCFS
2921 /*
2922  *  /proc interface
2923  */
2924
2925 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2926                                   struct snd_info_buffer *buffer)
2927 {
2928         struct snd_pcm_str *pstr = entry->private_data;
2929         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2930         mutex_lock(&pstr->oss.setup_mutex);
2931         while (setup) {
2932                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2933                             setup->task_name,
2934                             setup->periods,
2935                             setup->period_size,
2936                             setup->disable ? " disable" : "",
2937                             setup->direct ? " direct" : "",
2938                             setup->block ? " block" : "",
2939                             setup->nonblock ? " non-block" : "",
2940                             setup->partialfrag ? " partial-frag" : "",
2941                             setup->nosilence ? " no-silence" : "");
2942                 setup = setup->next;
2943         }
2944         mutex_unlock(&pstr->oss.setup_mutex);
2945 }
2946
2947 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2948 {
2949         struct snd_pcm_oss_setup *setup, *setupn;
2950
2951         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2952              setup; setup = setupn) {
2953                 setupn = setup->next;
2954                 kfree(setup->task_name);
2955                 kfree(setup);
2956         }
2957         pstr->oss.setup_list = NULL;
2958 }
2959
2960 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2961                                    struct snd_info_buffer *buffer)
2962 {
2963         struct snd_pcm_str *pstr = entry->private_data;
2964         char line[128], str[32], task_name[32];
2965         const char *ptr;
2966         int idx1;
2967         struct snd_pcm_oss_setup *setup, *setup1, template;
2968
2969         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2970                 mutex_lock(&pstr->oss.setup_mutex);
2971                 memset(&template, 0, sizeof(template));
2972                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2973                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2974                         snd_pcm_oss_proc_free_setup_list(pstr);
2975                         mutex_unlock(&pstr->oss.setup_mutex);
2976                         continue;
2977                 }
2978                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2979                         if (!strcmp(setup->task_name, task_name)) {
2980                                 template = *setup;
2981                                 break;
2982                         }
2983                 }
2984                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2985                 template.periods = simple_strtoul(str, NULL, 10);
2986                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2987                 template.period_size = simple_strtoul(str, NULL, 10);
2988                 for (idx1 = 31; idx1 >= 0; idx1--)
2989                         if (template.period_size & (1 << idx1))
2990                                 break;
2991                 for (idx1--; idx1 >= 0; idx1--)
2992                         template.period_size &= ~(1 << idx1);
2993                 do {
2994                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2995                         if (!strcmp(str, "disable")) {
2996                                 template.disable = 1;
2997                         } else if (!strcmp(str, "direct")) {
2998                                 template.direct = 1;
2999                         } else if (!strcmp(str, "block")) {
3000                                 template.block = 1;
3001                         } else if (!strcmp(str, "non-block")) {
3002                                 template.nonblock = 1;
3003                         } else if (!strcmp(str, "partial-frag")) {
3004                                 template.partialfrag = 1;
3005                         } else if (!strcmp(str, "no-silence")) {
3006                                 template.nosilence = 1;
3007                         } else if (!strcmp(str, "buggy-ptr")) {
3008                                 template.buggyptr = 1;
3009                         }
3010                 } while (*str);
3011                 if (setup == NULL) {
3012                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3013                         if (! setup) {
3014                                 buffer->error = -ENOMEM;
3015                                 mutex_unlock(&pstr->oss.setup_mutex);
3016                                 return;
3017                         }
3018                         if (pstr->oss.setup_list == NULL)
3019                                 pstr->oss.setup_list = setup;
3020                         else {
3021                                 for (setup1 = pstr->oss.setup_list;
3022                                      setup1->next; setup1 = setup1->next);
3023                                 setup1->next = setup;
3024                         }
3025                         template.task_name = kstrdup(task_name, GFP_KERNEL);
3026                         if (! template.task_name) {
3027                                 kfree(setup);
3028                                 buffer->error = -ENOMEM;
3029                                 mutex_unlock(&pstr->oss.setup_mutex);
3030                                 return;
3031                         }
3032                 }
3033                 *setup = template;
3034                 mutex_unlock(&pstr->oss.setup_mutex);
3035         }
3036 }
3037
3038 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3039 {
3040         int stream;
3041         for (stream = 0; stream < 2; ++stream) {
3042                 struct snd_info_entry *entry;
3043                 struct snd_pcm_str *pstr = &pcm->streams[stream];
3044                 if (pstr->substream_count == 0)
3045                         continue;
3046                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3047                         entry->content = SNDRV_INFO_CONTENT_TEXT;
3048                         entry->mode = S_IFREG | 0644;
3049                         entry->c.text.read = snd_pcm_oss_proc_read;
3050                         entry->c.text.write = snd_pcm_oss_proc_write;
3051                         entry->private_data = pstr;
3052                         if (snd_info_register(entry) < 0) {
3053                                 snd_info_free_entry(entry);
3054                                 entry = NULL;
3055                         }
3056                 }
3057                 pstr->oss.proc_entry = entry;
3058         }
3059 }
3060
3061 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3062 {
3063         int stream;
3064         for (stream = 0; stream < 2; ++stream) {
3065                 struct snd_pcm_str *pstr = &pcm->streams[stream];
3066                 snd_info_free_entry(pstr->oss.proc_entry);
3067                 pstr->oss.proc_entry = NULL;
3068                 snd_pcm_oss_proc_free_setup_list(pstr);
3069         }
3070 }
3071 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3072 #define snd_pcm_oss_proc_init(pcm)
3073 #define snd_pcm_oss_proc_done(pcm)
3074 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3075
3076 /*
3077  *  ENTRY functions
3078  */
3079
3080 static const struct file_operations snd_pcm_oss_f_reg =
3081 {
3082         .owner =        THIS_MODULE,
3083         .read =         snd_pcm_oss_read,
3084         .write =        snd_pcm_oss_write,
3085         .open =         snd_pcm_oss_open,
3086         .release =      snd_pcm_oss_release,
3087         .llseek =       no_llseek,
3088         .poll =         snd_pcm_oss_poll,
3089         .unlocked_ioctl =       snd_pcm_oss_ioctl,
3090         .compat_ioctl = snd_pcm_oss_ioctl_compat,
3091         .mmap =         snd_pcm_oss_mmap,
3092 };
3093
3094 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3095 {
3096         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3097                                     pcm->card, index, &snd_pcm_oss_f_reg,
3098                                     pcm) < 0) {
3099                 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3100                            pcm->card->number, pcm->device);
3101         }
3102 }
3103
3104 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3105 {
3106         pcm->oss.reg = 0;
3107         if (dsp_map[pcm->card->number] == (int)pcm->device) {
3108                 char name[128];
3109                 int duplex;
3110                 register_oss_dsp(pcm, 0);
3111                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3112                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3113                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3114                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3115 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3116                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3117                                       pcm->card->number,
3118                                       name);
3119 #endif
3120                 pcm->oss.reg++;
3121                 pcm->oss.reg_mask |= 1;
3122         }
3123         if (adsp_map[pcm->card->number] == (int)pcm->device) {
3124                 register_oss_dsp(pcm, 1);
3125                 pcm->oss.reg++;
3126                 pcm->oss.reg_mask |= 2;
3127         }
3128
3129         if (pcm->oss.reg)
3130                 snd_pcm_oss_proc_init(pcm);
3131
3132         return 0;
3133 }
3134
3135 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3136 {
3137         if (pcm->oss.reg) {
3138                 if (pcm->oss.reg_mask & 1) {
3139                         pcm->oss.reg_mask &= ~1;
3140                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3141                                                   pcm->card, 0);
3142                 }
3143                 if (pcm->oss.reg_mask & 2) {
3144                         pcm->oss.reg_mask &= ~2;
3145                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3146                                                   pcm->card, 1);
3147                 }
3148                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3149 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3150                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3151 #endif
3152                 }
3153                 pcm->oss.reg = 0;
3154         }
3155         return 0;
3156 }
3157
3158 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3159 {
3160         snd_pcm_oss_disconnect_minor(pcm);
3161         snd_pcm_oss_proc_done(pcm);
3162         return 0;
3163 }
3164
3165 static struct snd_pcm_notify snd_pcm_oss_notify =
3166 {
3167         .n_register =   snd_pcm_oss_register_minor,
3168         .n_disconnect = snd_pcm_oss_disconnect_minor,
3169         .n_unregister = snd_pcm_oss_unregister_minor,
3170 };
3171
3172 static int __init alsa_pcm_oss_init(void)
3173 {
3174         int i;
3175         int err;
3176
3177         /* check device map table */
3178         for (i = 0; i < SNDRV_CARDS; i++) {
3179                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3180                         pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3181                                    i, dsp_map[i]);
3182                         dsp_map[i] = 0;
3183                 }
3184                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3185                         pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3186                                    i, adsp_map[i]);
3187                         adsp_map[i] = 1;
3188                 }
3189         }
3190         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3191                 return err;
3192         return 0;
3193 }
3194
3195 static void __exit alsa_pcm_oss_exit(void)
3196 {
3197         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3198 }
3199
3200 module_init(alsa_pcm_oss_init)
3201 module_exit(alsa_pcm_oss_exit)