~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

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

Version: ~ [ linux-5.8-rc5 ] ~ [ linux-5.7.8 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.51 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.132 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.188 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.230 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.230 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp