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TOMOYO Linux Cross Reference
Linux/sound/core/oss/pcm_oss.c

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

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