[ALSA] Remove sound/driver.h
[linux-2.6.git] / sound / core / oss / pcm_oss.c
1 /*
2  *  Digital Audio (PCM) abstract layer / OSS compatible
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/moduleparam.h>
34 #include <linux/string.h>
35 #include <sound/core.h>
36 #include <sound/minors.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include "pcm_plugin.h"
40 #include <sound/info.h>
41 #include <linux/soundcard.h>
42 #include <sound/initval.h>
43
44 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
45
46 static int dsp_map[SNDRV_CARDS];
47 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
48 static int nonblock_open = 1;
49
50 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
51 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
52 MODULE_LICENSE("GPL");
53 module_param_array(dsp_map, int, NULL, 0444);
54 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
55 module_param_array(adsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
57 module_param(nonblock_open, bool, 0644);
58 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
59 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
61
62 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
63 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
64 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
66
67 static inline mm_segment_t snd_enter_user(void)
68 {
69         mm_segment_t fs = get_fs();
70         set_fs(get_ds());
71         return fs;
72 }
73
74 static inline void snd_leave_user(mm_segment_t fs)
75 {
76         set_fs(fs);
77 }
78
79 /*
80  * helper functions to process hw_params
81  */
82 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
83 {
84         int changed = 0;
85         if (i->min < min) {
86                 i->min = min;
87                 i->openmin = openmin;
88                 changed = 1;
89         } else if (i->min == min && !i->openmin && openmin) {
90                 i->openmin = 1;
91                 changed = 1;
92         }
93         if (i->integer) {
94                 if (i->openmin) {
95                         i->min++;
96                         i->openmin = 0;
97                 }
98         }
99         if (snd_interval_checkempty(i)) {
100                 snd_interval_none(i);
101                 return -EINVAL;
102         }
103         return changed;
104 }
105
106 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
107 {
108         int changed = 0;
109         if (i->max > max) {
110                 i->max = max;
111                 i->openmax = openmax;
112                 changed = 1;
113         } else if (i->max == max && !i->openmax && openmax) {
114                 i->openmax = 1;
115                 changed = 1;
116         }
117         if (i->integer) {
118                 if (i->openmax) {
119                         i->max--;
120                         i->openmax = 0;
121                 }
122         }
123         if (snd_interval_checkempty(i)) {
124                 snd_interval_none(i);
125                 return -EINVAL;
126         }
127         return changed;
128 }
129
130 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
131 {
132         struct snd_interval t;
133         t.empty = 0;
134         t.min = t.max = val;
135         t.openmin = t.openmax = 0;
136         t.integer = 1;
137         return snd_interval_refine(i, &t);
138 }
139
140 /**
141  * snd_pcm_hw_param_value_min
142  * @params: the hw_params instance
143  * @var: parameter to retrieve
144  * @dir: pointer to the direction (-1,0,1) or NULL
145  *
146  * Return the minimum value for field PAR.
147  */
148 static unsigned int
149 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
150                            snd_pcm_hw_param_t var, int *dir)
151 {
152         if (hw_is_mask(var)) {
153                 if (dir)
154                         *dir = 0;
155                 return snd_mask_min(hw_param_mask_c(params, var));
156         }
157         if (hw_is_interval(var)) {
158                 const struct snd_interval *i = hw_param_interval_c(params, var);
159                 if (dir)
160                         *dir = i->openmin;
161                 return snd_interval_min(i);
162         }
163         return -EINVAL;
164 }
165
166 /**
167  * snd_pcm_hw_param_value_max
168  * @params: the hw_params instance
169  * @var: parameter to retrieve
170  * @dir: pointer to the direction (-1,0,1) or NULL
171  *
172  * Return the maximum value for field PAR.
173  */
174 static unsigned int
175 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
176                            snd_pcm_hw_param_t var, int *dir)
177 {
178         if (hw_is_mask(var)) {
179                 if (dir)
180                         *dir = 0;
181                 return snd_mask_max(hw_param_mask_c(params, var));
182         }
183         if (hw_is_interval(var)) {
184                 const struct snd_interval *i = hw_param_interval_c(params, var);
185                 if (dir)
186                         *dir = - (int) i->openmax;
187                 return snd_interval_max(i);
188         }
189         return -EINVAL;
190 }
191
192 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
193                                   snd_pcm_hw_param_t var,
194                                   const struct snd_mask *val)
195 {
196         int changed;
197         changed = snd_mask_refine(hw_param_mask(params, var), val);
198         if (changed) {
199                 params->cmask |= 1 << var;
200                 params->rmask |= 1 << var;
201         }
202         return changed;
203 }
204
205 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
206                                  struct snd_pcm_hw_params *params,
207                                  snd_pcm_hw_param_t var,
208                                  const struct snd_mask *val)
209 {
210         int changed = _snd_pcm_hw_param_mask(params, var, val);
211         if (changed < 0)
212                 return changed;
213         if (params->rmask) {
214                 int err = snd_pcm_hw_refine(pcm, params);
215                 if (err < 0)
216                         return err;
217         }
218         return 0;
219 }
220
221 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
222                                  snd_pcm_hw_param_t var, unsigned int val,
223                                  int dir)
224 {
225         int changed;
226         int open = 0;
227         if (dir) {
228                 if (dir > 0) {
229                         open = 1;
230                 } else if (dir < 0) {
231                         if (val > 0) {
232                                 open = 1;
233                                 val--;
234                         }
235                 }
236         }
237         if (hw_is_mask(var))
238                 changed = snd_mask_refine_min(hw_param_mask(params, var),
239                                               val + !!open);
240         else if (hw_is_interval(var))
241                 changed = snd_interval_refine_min(hw_param_interval(params, var),
242                                                   val, open);
243         else
244                 return -EINVAL;
245         if (changed) {
246                 params->cmask |= 1 << var;
247                 params->rmask |= 1 << var;
248         }
249         return changed;
250 }
251
252 /**
253  * snd_pcm_hw_param_min
254  * @pcm: PCM instance
255  * @params: the hw_params instance
256  * @var: parameter to retrieve
257  * @val: minimal value
258  * @dir: pointer to the direction (-1,0,1) or NULL
259  *
260  * Inside configuration space defined by PARAMS remove from PAR all 
261  * values < VAL. Reduce configuration space accordingly.
262  * Return new minimum or -EINVAL if the configuration space is empty
263  */
264 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
265                                 struct snd_pcm_hw_params *params,
266                                 snd_pcm_hw_param_t var, unsigned int val,
267                                 int *dir)
268 {
269         int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
270         if (changed < 0)
271                 return changed;
272         if (params->rmask) {
273                 int err = snd_pcm_hw_refine(pcm, params);
274                 if (err < 0)
275                         return err;
276         }
277         return snd_pcm_hw_param_value_min(params, var, dir);
278 }
279
280 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
281                                  snd_pcm_hw_param_t var, unsigned int val,
282                                  int dir)
283 {
284         int changed;
285         int open = 0;
286         if (dir) {
287                 if (dir < 0) {
288                         open = 1;
289                 } else if (dir > 0) {
290                         open = 1;
291                         val++;
292                 }
293         }
294         if (hw_is_mask(var)) {
295                 if (val == 0 && open) {
296                         snd_mask_none(hw_param_mask(params, var));
297                         changed = -EINVAL;
298                 } else
299                         changed = snd_mask_refine_max(hw_param_mask(params, var),
300                                                       val - !!open);
301         } else if (hw_is_interval(var))
302                 changed = snd_interval_refine_max(hw_param_interval(params, var),
303                                                   val, open);
304         else
305                 return -EINVAL;
306         if (changed) {
307                 params->cmask |= 1 << var;
308                 params->rmask |= 1 << var;
309         }
310         return changed;
311 }
312
313 /**
314  * snd_pcm_hw_param_max
315  * @pcm: PCM instance
316  * @params: the hw_params instance
317  * @var: parameter to retrieve
318  * @val: maximal value
319  * @dir: pointer to the direction (-1,0,1) or NULL
320  *
321  * Inside configuration space defined by PARAMS remove from PAR all 
322  *  values >= VAL + 1. Reduce configuration space accordingly.
323  *  Return new maximum or -EINVAL if the configuration space is empty
324  */
325 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
326                                 struct snd_pcm_hw_params *params,
327                                 snd_pcm_hw_param_t var, unsigned int val,
328                                 int *dir)
329 {
330         int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
331         if (changed < 0)
332                 return changed;
333         if (params->rmask) {
334                 int err = snd_pcm_hw_refine(pcm, params);
335                 if (err < 0)
336                         return err;
337         }
338         return snd_pcm_hw_param_value_max(params, var, dir);
339 }
340
341 static int boundary_sub(int a, int adir,
342                         int b, int bdir,
343                         int *c, int *cdir)
344 {
345         adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
346         bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
347         *c = a - b;
348         *cdir = adir - bdir;
349         if (*cdir == -2) {
350                 (*c)--;
351         } else if (*cdir == 2) {
352                 (*c)++;
353         }
354         return 0;
355 }
356
357 static int boundary_lt(unsigned int a, int adir,
358                        unsigned int b, int bdir)
359 {
360         if (adir < 0) {
361                 a--;
362                 adir = 1;
363         } else if (adir > 0)
364                 adir = 1;
365         if (bdir < 0) {
366                 b--;
367                 bdir = 1;
368         } else if (bdir > 0)
369                 bdir = 1;
370         return a < b || (a == b && adir < bdir);
371 }
372
373 /* Return 1 if min is nearer to best than max */
374 static int boundary_nearer(int min, int mindir,
375                            int best, int bestdir,
376                            int max, int maxdir)
377 {
378         int dmin, dmindir;
379         int dmax, dmaxdir;
380         boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
381         boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
382         return boundary_lt(dmin, dmindir, dmax, dmaxdir);
383 }
384
385 /**
386  * snd_pcm_hw_param_near
387  * @pcm: PCM instance
388  * @params: the hw_params instance
389  * @var: parameter to retrieve
390  * @best: value to set
391  * @dir: pointer to the direction (-1,0,1) or NULL
392  *
393  * Inside configuration space defined by PARAMS set PAR to the available value
394  * nearest to VAL. Reduce configuration space accordingly.
395  * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
396  * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
397  * Return the value found.
398   */
399 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
400                                  struct snd_pcm_hw_params *params,
401                                  snd_pcm_hw_param_t var, unsigned int best,
402                                  int *dir)
403 {
404         struct snd_pcm_hw_params *save = NULL;
405         int v;
406         unsigned int saved_min;
407         int last = 0;
408         int min, max;
409         int mindir, maxdir;
410         int valdir = dir ? *dir : 0;
411         /* FIXME */
412         if (best > INT_MAX)
413                 best = INT_MAX;
414         min = max = best;
415         mindir = maxdir = valdir;
416         if (maxdir > 0)
417                 maxdir = 0;
418         else if (maxdir == 0)
419                 maxdir = -1;
420         else {
421                 maxdir = 1;
422                 max--;
423         }
424         save = kmalloc(sizeof(*save), GFP_KERNEL);
425         if (save == NULL)
426                 return -ENOMEM;
427         *save = *params;
428         saved_min = min;
429         min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
430         if (min >= 0) {
431                 struct snd_pcm_hw_params *params1;
432                 if (max < 0)
433                         goto _end;
434                 if ((unsigned int)min == saved_min && mindir == valdir)
435                         goto _end;
436                 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
437                 if (params1 == NULL) {
438                         kfree(save);
439                         return -ENOMEM;
440                 }
441                 *params1 = *save;
442                 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
443                 if (max < 0) {
444                         kfree(params1);
445                         goto _end;
446                 }
447                 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
448                         *params = *params1;
449                         last = 1;
450                 }
451                 kfree(params1);
452         } else {
453                 *params = *save;
454                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
455                 snd_assert(max >= 0, return -EINVAL);
456                 last = 1;
457         }
458  _end:
459         kfree(save);
460         if (last)
461                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
462         else
463                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
464         snd_assert(v >= 0, return -EINVAL);
465         return v;
466 }
467
468 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
469                                  snd_pcm_hw_param_t var, unsigned int val,
470                                  int dir)
471 {
472         int changed;
473         if (hw_is_mask(var)) {
474                 struct snd_mask *m = hw_param_mask(params, var);
475                 if (val == 0 && dir < 0) {
476                         changed = -EINVAL;
477                         snd_mask_none(m);
478                 } else {
479                         if (dir > 0)
480                                 val++;
481                         else if (dir < 0)
482                                 val--;
483                         changed = snd_mask_refine_set(hw_param_mask(params, var), val);
484                 }
485         } else if (hw_is_interval(var)) {
486                 struct snd_interval *i = hw_param_interval(params, var);
487                 if (val == 0 && dir < 0) {
488                         changed = -EINVAL;
489                         snd_interval_none(i);
490                 } else if (dir == 0)
491                         changed = snd_interval_refine_set(i, val);
492                 else {
493                         struct snd_interval t;
494                         t.openmin = 1;
495                         t.openmax = 1;
496                         t.empty = 0;
497                         t.integer = 0;
498                         if (dir < 0) {
499                                 t.min = val - 1;
500                                 t.max = val;
501                         } else {
502                                 t.min = val;
503                                 t.max = val+1;
504                         }
505                         changed = snd_interval_refine(i, &t);
506                 }
507         } else
508                 return -EINVAL;
509         if (changed) {
510                 params->cmask |= 1 << var;
511                 params->rmask |= 1 << var;
512         }
513         return changed;
514 }
515
516 /**
517  * snd_pcm_hw_param_set
518  * @pcm: PCM instance
519  * @params: the hw_params instance
520  * @var: parameter to retrieve
521  * @val: value to set
522  * @dir: pointer to the direction (-1,0,1) or NULL
523  *
524  * Inside configuration space defined by PARAMS remove from PAR all 
525  * values != VAL. Reduce configuration space accordingly.
526  *  Return VAL or -EINVAL if the configuration space is empty
527  */
528 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
529                                 struct snd_pcm_hw_params *params,
530                                 snd_pcm_hw_param_t var, unsigned int val,
531                                 int dir)
532 {
533         int changed = _snd_pcm_hw_param_set(params, var, val, dir);
534         if (changed < 0)
535                 return changed;
536         if (params->rmask) {
537                 int err = snd_pcm_hw_refine(pcm, params);
538                 if (err < 0)
539                         return err;
540         }
541         return snd_pcm_hw_param_value(params, var, NULL);
542 }
543
544 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
545                                         snd_pcm_hw_param_t var)
546 {
547         int changed;
548         changed = snd_interval_setinteger(hw_param_interval(params, var));
549         if (changed) {
550                 params->cmask |= 1 << var;
551                 params->rmask |= 1 << var;
552         }
553         return changed;
554 }
555         
556 /*
557  * plugin
558  */
559
560 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
561 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
562 {
563         struct snd_pcm_runtime *runtime = substream->runtime;
564         struct snd_pcm_plugin *plugin, *next;
565         
566         plugin = runtime->oss.plugin_first;
567         while (plugin) {
568                 next = plugin->next;
569                 snd_pcm_plugin_free(plugin);
570                 plugin = next;
571         }
572         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
573         return 0;
574 }
575
576 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
577 {
578         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
579         plugin->next = runtime->oss.plugin_first;
580         plugin->prev = NULL;
581         if (runtime->oss.plugin_first) {
582                 runtime->oss.plugin_first->prev = plugin;
583                 runtime->oss.plugin_first = plugin;
584         } else {
585                 runtime->oss.plugin_last =
586                 runtime->oss.plugin_first = plugin;
587         }
588         return 0;
589 }
590
591 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
592 {
593         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
594         plugin->next = NULL;
595         plugin->prev = runtime->oss.plugin_last;
596         if (runtime->oss.plugin_last) {
597                 runtime->oss.plugin_last->next = plugin;
598                 runtime->oss.plugin_last = plugin;
599         } else {
600                 runtime->oss.plugin_last =
601                 runtime->oss.plugin_first = plugin;
602         }
603         return 0;
604 }
605 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
606
607 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
608 {
609         struct snd_pcm_runtime *runtime = substream->runtime;
610         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
611         long bytes = frames_to_bytes(runtime, frames);
612         if (buffer_size == runtime->oss.buffer_bytes)
613                 return bytes;
614 #if BITS_PER_LONG >= 64
615         return runtime->oss.buffer_bytes * bytes / buffer_size;
616 #else
617         {
618                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
619                 u32 rem;
620                 div64_32(&bsize, buffer_size, &rem);
621                 return (long)bsize;
622         }
623 #endif
624 }
625
626 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
627 {
628         struct snd_pcm_runtime *runtime = substream->runtime;
629         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
630         if (buffer_size == runtime->oss.buffer_bytes)
631                 return bytes_to_frames(runtime, bytes);
632         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
633 }
634
635 /* define extended formats in the recent OSS versions (if any) */
636 /* linear formats */
637 #define AFMT_S32_LE      0x00001000
638 #define AFMT_S32_BE      0x00002000
639 #define AFMT_S24_LE      0x00008000
640 #define AFMT_S24_BE      0x00010000
641 #define AFMT_S24_PACKED  0x00040000
642
643 /* other supported formats */
644 #define AFMT_FLOAT       0x00004000
645 #define AFMT_SPDIF_RAW   0x00020000
646
647 /* unsupported formats */
648 #define AFMT_AC3         0x00000400
649 #define AFMT_VORBIS      0x00000800
650
651 static int snd_pcm_oss_format_from(int format)
652 {
653         switch (format) {
654         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
655         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
656         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
657         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
658         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
659         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
660         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
661         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
662         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
663         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
664         case AFMT_S32_LE:       return SNDRV_PCM_FORMAT_S32_LE;
665         case AFMT_S32_BE:       return SNDRV_PCM_FORMAT_S32_BE;
666         case AFMT_S24_LE:       return SNDRV_PCM_FORMAT_S24_LE;
667         case AFMT_S24_BE:       return SNDRV_PCM_FORMAT_S24_BE;
668         case AFMT_S24_PACKED:   return SNDRV_PCM_FORMAT_S24_3LE;
669         case AFMT_FLOAT:        return SNDRV_PCM_FORMAT_FLOAT;
670         case AFMT_SPDIF_RAW:    return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
671         default:                return SNDRV_PCM_FORMAT_U8;
672         }
673 }
674
675 static int snd_pcm_oss_format_to(int format)
676 {
677         switch (format) {
678         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
679         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
680         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
681         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
682         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
683         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
684         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
685         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
686         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
687         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
688         case SNDRV_PCM_FORMAT_S32_LE:   return AFMT_S32_LE;
689         case SNDRV_PCM_FORMAT_S32_BE:   return AFMT_S32_BE;
690         case SNDRV_PCM_FORMAT_S24_LE:   return AFMT_S24_LE;
691         case SNDRV_PCM_FORMAT_S24_BE:   return AFMT_S24_BE;
692         case SNDRV_PCM_FORMAT_S24_3LE:  return AFMT_S24_PACKED;
693         case SNDRV_PCM_FORMAT_FLOAT:    return AFMT_FLOAT;
694         case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
695         default:                        return -EINVAL;
696         }
697 }
698
699 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 
700                                    struct snd_pcm_hw_params *oss_params,
701                                    struct snd_pcm_hw_params *slave_params)
702 {
703         size_t s;
704         size_t oss_buffer_size, oss_period_size, oss_periods;
705         size_t min_period_size, max_period_size;
706         struct snd_pcm_runtime *runtime = substream->runtime;
707         size_t oss_frame_size;
708
709         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
710                          params_channels(oss_params) / 8;
711
712         oss_buffer_size = snd_pcm_plug_client_size(substream,
713                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
714         oss_buffer_size = 1 << ld2(oss_buffer_size);
715         if (atomic_read(&substream->mmap_count)) {
716                 if (oss_buffer_size > runtime->oss.mmap_bytes)
717                         oss_buffer_size = runtime->oss.mmap_bytes;
718         }
719
720         if (substream->oss.setup.period_size > 16)
721                 oss_period_size = substream->oss.setup.period_size;
722         else if (runtime->oss.fragshift) {
723                 oss_period_size = 1 << runtime->oss.fragshift;
724                 if (oss_period_size > oss_buffer_size / 2)
725                         oss_period_size = oss_buffer_size / 2;
726         } else {
727                 int sd;
728                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
729
730                 oss_period_size = oss_buffer_size;
731                 do {
732                         oss_period_size /= 2;
733                 } while (oss_period_size > bytes_per_sec);
734                 if (runtime->oss.subdivision == 0) {
735                         sd = 4;
736                         if (oss_period_size / sd > 4096)
737                                 sd *= 2;
738                         if (oss_period_size / sd < 4096)
739                                 sd = 1;
740                 } else
741                         sd = runtime->oss.subdivision;
742                 oss_period_size /= sd;
743                 if (oss_period_size < 16)
744                         oss_period_size = 16;
745         }
746
747         min_period_size = snd_pcm_plug_client_size(substream,
748                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
749         min_period_size *= oss_frame_size;
750         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
751         if (oss_period_size < min_period_size)
752                 oss_period_size = min_period_size;
753
754         max_period_size = snd_pcm_plug_client_size(substream,
755                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
756         max_period_size *= oss_frame_size;
757         max_period_size = 1 << ld2(max_period_size);
758         if (oss_period_size > max_period_size)
759                 oss_period_size = max_period_size;
760
761         oss_periods = oss_buffer_size / oss_period_size;
762
763         if (substream->oss.setup.periods > 1)
764                 oss_periods = substream->oss.setup.periods;
765
766         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
767         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
768                 s = runtime->oss.maxfrags;
769         if (oss_periods > s)
770                 oss_periods = s;
771
772         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
773         if (s < 2)
774                 s = 2;
775         if (oss_periods < s)
776                 oss_periods = s;
777
778         while (oss_period_size * oss_periods > oss_buffer_size)
779                 oss_period_size /= 2;
780
781         snd_assert(oss_period_size >= 16, return -EINVAL);
782         runtime->oss.period_bytes = oss_period_size;
783         runtime->oss.period_frames = 1;
784         runtime->oss.periods = oss_periods;
785         return 0;
786 }
787
788 static int choose_rate(struct snd_pcm_substream *substream,
789                        struct snd_pcm_hw_params *params, unsigned int best_rate)
790 {
791         struct snd_interval *it;
792         struct snd_pcm_hw_params *save;
793         unsigned int rate, prev;
794
795         save = kmalloc(sizeof(*save), GFP_KERNEL);
796         if (save == NULL)
797                 return -ENOMEM;
798         *save = *params;
799         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
800
801         /* try multiples of the best rate */
802         rate = best_rate;
803         for (;;) {
804                 if (it->max < rate || (it->max == rate && it->openmax))
805                         break;
806                 if (it->min < rate || (it->min == rate && !it->openmin)) {
807                         int ret;
808                         ret = snd_pcm_hw_param_set(substream, params,
809                                                    SNDRV_PCM_HW_PARAM_RATE,
810                                                    rate, 0);
811                         if (ret == (int)rate) {
812                                 kfree(save);
813                                 return rate;
814                         }
815                         *params = *save;
816                 }
817                 prev = rate;
818                 rate += best_rate;
819                 if (rate <= prev)
820                         break;
821         }
822
823         /* not found, use the nearest rate */
824         kfree(save);
825         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
826 }
827
828 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
829 {
830         struct snd_pcm_runtime *runtime = substream->runtime;
831         struct snd_pcm_hw_params *params, *sparams;
832         struct snd_pcm_sw_params *sw_params;
833         ssize_t oss_buffer_size, oss_period_size;
834         size_t oss_frame_size;
835         int err;
836         int direct;
837         int format, sformat, n;
838         struct snd_mask sformat_mask;
839         struct snd_mask mask;
840
841         if (mutex_lock_interruptible(&runtime->oss.params_lock))
842                 return -EINTR;
843         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
844         params = kmalloc(sizeof(*params), GFP_KERNEL);
845         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
846         if (!sw_params || !params || !sparams) {
847                 snd_printd("No memory\n");
848                 err = -ENOMEM;
849                 goto failure;
850         }
851
852         if (atomic_read(&substream->mmap_count))
853                 direct = 1;
854         else
855                 direct = substream->oss.setup.direct;
856
857         _snd_pcm_hw_params_any(sparams);
858         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
859         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
860         snd_mask_none(&mask);
861         if (atomic_read(&substream->mmap_count))
862                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
863         else {
864                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
865                 if (!direct)
866                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
867         }
868         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
869         if (err < 0) {
870                 snd_printd("No usable accesses\n");
871                 err = -EINVAL;
872                 goto failure;
873         }
874         choose_rate(substream, sparams, runtime->oss.rate);
875         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
876
877         format = snd_pcm_oss_format_from(runtime->oss.format);
878
879         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
880         if (direct)
881                 sformat = format;
882         else
883                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
884
885         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
886                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
887                         if (snd_mask_test(&sformat_mask, sformat) &&
888                             snd_pcm_oss_format_to(sformat) >= 0)
889                                 break;
890                 }
891                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
892                         snd_printd("Cannot find a format!!!\n");
893                         err = -EINVAL;
894                         goto failure;
895                 }
896         }
897         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
898         snd_assert(err >= 0, goto failure);
899
900         if (direct) {
901                 memcpy(params, sparams, sizeof(*params));
902         } else {
903                 _snd_pcm_hw_params_any(params);
904                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
905                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
906                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
907                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
908                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
909                                       runtime->oss.channels, 0);
910                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
911                                       runtime->oss.rate, 0);
912                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
913                          params_access(params), params_format(params),
914                          params_channels(params), params_rate(params));
915         }
916         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
917                  params_access(sparams), params_format(sparams),
918                  params_channels(sparams), params_rate(sparams));
919
920         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
921                          params_channels(params) / 8;
922
923 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
924         snd_pcm_oss_plugin_clear(substream);
925         if (!direct) {
926                 /* add necessary plugins */
927                 snd_pcm_oss_plugin_clear(substream);
928                 if ((err = snd_pcm_plug_format_plugins(substream,
929                                                        params, 
930                                                        sparams)) < 0) {
931                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
932                         snd_pcm_oss_plugin_clear(substream);
933                         goto failure;
934                 }
935                 if (runtime->oss.plugin_first) {
936                         struct snd_pcm_plugin *plugin;
937                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
938                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
939                                 snd_pcm_oss_plugin_clear(substream);
940                                 goto failure;
941                         }
942                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
943                                 err = snd_pcm_plugin_append(plugin);
944                         } else {
945                                 err = snd_pcm_plugin_insert(plugin);
946                         }
947                         if (err < 0) {
948                                 snd_pcm_oss_plugin_clear(substream);
949                                 goto failure;
950                         }
951                 }
952         }
953 #endif
954
955         err = snd_pcm_oss_period_size(substream, params, sparams);
956         if (err < 0)
957                 goto failure;
958
959         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
960         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
961         snd_assert(err >= 0, goto failure);
962
963         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
964                                      runtime->oss.periods, NULL);
965         snd_assert(err >= 0, goto failure);
966
967         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
968
969         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
970                 snd_printd("HW_PARAMS failed: %i\n", err);
971                 goto failure;
972         }
973
974         memset(sw_params, 0, sizeof(*sw_params));
975         if (runtime->oss.trigger) {
976                 sw_params->start_threshold = 1;
977         } else {
978                 sw_params->start_threshold = runtime->boundary;
979         }
980         if (atomic_read(&substream->mmap_count) ||
981             substream->stream == SNDRV_PCM_STREAM_CAPTURE)
982                 sw_params->stop_threshold = runtime->boundary;
983         else
984                 sw_params->stop_threshold = runtime->buffer_size;
985         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
986         sw_params->period_step = 1;
987         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
988                 1 : runtime->period_size;
989         if (atomic_read(&substream->mmap_count) ||
990             substream->oss.setup.nosilence) {
991                 sw_params->silence_threshold = 0;
992                 sw_params->silence_size = 0;
993         } else {
994                 snd_pcm_uframes_t frames;
995                 frames = runtime->period_size + 16;
996                 if (frames > runtime->buffer_size)
997                         frames = runtime->buffer_size;
998                 sw_params->silence_threshold = frames;
999                 sw_params->silence_size = frames;
1000         }
1001
1002         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1003                 snd_printd("SW_PARAMS failed: %i\n", err);
1004                 goto failure;
1005         }
1006
1007         runtime->oss.periods = params_periods(sparams);
1008         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1009         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
1010 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1011         if (runtime->oss.plugin_first) {
1012                 err = snd_pcm_plug_alloc(substream, oss_period_size);
1013                 if (err < 0)
1014                         goto failure;
1015         }
1016 #endif
1017         oss_period_size *= oss_frame_size;
1018
1019         oss_buffer_size = oss_period_size * runtime->oss.periods;
1020         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
1021
1022         runtime->oss.period_bytes = oss_period_size;
1023         runtime->oss.buffer_bytes = oss_buffer_size;
1024
1025         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1026                  runtime->oss.period_bytes,
1027                  runtime->oss.buffer_bytes);
1028         pdprintf("slave: period_size = %i, buffer_size = %i\n",
1029                  params_period_size(sparams),
1030                  params_buffer_size(sparams));
1031
1032         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1033         runtime->oss.channels = params_channels(params);
1034         runtime->oss.rate = params_rate(params);
1035
1036         runtime->oss.params = 0;
1037         runtime->oss.prepare = 1;
1038         vfree(runtime->oss.buffer);
1039         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1040         runtime->oss.buffer_used = 0;
1041         if (runtime->dma_area)
1042                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1043
1044         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1045
1046         err = 0;
1047 failure:
1048         kfree(sw_params);
1049         kfree(params);
1050         kfree(sparams);
1051         mutex_unlock(&runtime->oss.params_lock);
1052         return err;
1053 }
1054
1055 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1056 {
1057         int idx, err;
1058         struct snd_pcm_substream *asubstream = NULL, *substream;
1059
1060         for (idx = 0; idx < 2; idx++) {
1061                 substream = pcm_oss_file->streams[idx];
1062                 if (substream == NULL)
1063                         continue;
1064                 if (asubstream == NULL)
1065                         asubstream = substream;
1066                 if (substream->runtime->oss.params) {
1067                         err = snd_pcm_oss_change_params(substream);
1068                         if (err < 0)
1069                                 return err;
1070                 }
1071         }
1072         snd_assert(asubstream != NULL, return -EIO);
1073         if (r_substream)
1074                 *r_substream = asubstream;
1075         return 0;
1076 }
1077
1078 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1079 {
1080         int err;
1081         struct snd_pcm_runtime *runtime = substream->runtime;
1082
1083         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1084         if (err < 0) {
1085                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1086                 return err;
1087         }
1088         runtime->oss.prepare = 0;
1089         runtime->oss.prev_hw_ptr_interrupt = 0;
1090         runtime->oss.period_ptr = 0;
1091         runtime->oss.buffer_used = 0;
1092
1093         return 0;
1094 }
1095
1096 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1097 {
1098         struct snd_pcm_runtime *runtime;
1099         int err;
1100
1101         if (substream == NULL)
1102                 return 0;
1103         runtime = substream->runtime;
1104         if (runtime->oss.params) {
1105                 err = snd_pcm_oss_change_params(substream);
1106                 if (err < 0)
1107                         return err;
1108         }
1109         if (runtime->oss.prepare) {
1110                 err = snd_pcm_oss_prepare(substream);
1111                 if (err < 0)
1112                         return err;
1113         }
1114         return 0;
1115 }
1116
1117 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1118 {
1119         struct snd_pcm_runtime *runtime;
1120         snd_pcm_uframes_t frames;
1121         int err = 0;
1122
1123         while (1) {
1124                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1125                 if (err < 0)
1126                         break;
1127                 runtime = substream->runtime;
1128                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1129                         break;
1130                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1131                 /* until avail(delay) <= buffer_size */
1132                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1133                 frames /= runtime->period_size;
1134                 frames *= runtime->period_size;
1135                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1136                 if (err < 0)
1137                         break;
1138         }
1139         return err;
1140 }
1141
1142 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1143 {
1144         struct snd_pcm_runtime *runtime = substream->runtime;
1145         int ret;
1146         while (1) {
1147                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1148                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1149 #ifdef OSS_DEBUG
1150                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1151                                 printk("pcm_oss: write: recovering from XRUN\n");
1152                         else
1153                                 printk("pcm_oss: write: recovering from SUSPEND\n");
1154 #endif
1155                         ret = snd_pcm_oss_prepare(substream);
1156                         if (ret < 0)
1157                                 break;
1158                 }
1159                 if (in_kernel) {
1160                         mm_segment_t fs;
1161                         fs = snd_enter_user();
1162                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1163                         snd_leave_user(fs);
1164                 } else {
1165                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1166                 }
1167                 if (ret != -EPIPE && ret != -ESTRPIPE)
1168                         break;
1169                 /* test, if we can't store new data, because the stream */
1170                 /* has not been started */
1171                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1172                         return -EAGAIN;
1173         }
1174         return ret;
1175 }
1176
1177 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1178 {
1179         struct snd_pcm_runtime *runtime = substream->runtime;
1180         snd_pcm_sframes_t delay;
1181         int ret;
1182         while (1) {
1183                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1184                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1185 #ifdef OSS_DEBUG
1186                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1187                                 printk("pcm_oss: read: recovering from XRUN\n");
1188                         else
1189                                 printk("pcm_oss: read: recovering from SUSPEND\n");
1190 #endif
1191                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1192                         if (ret < 0)
1193                                 break;
1194                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1195                         ret = snd_pcm_oss_prepare(substream);
1196                         if (ret < 0)
1197                                 break;
1198                 }
1199                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1200                 if (ret < 0)
1201                         break;
1202                 if (in_kernel) {
1203                         mm_segment_t fs;
1204                         fs = snd_enter_user();
1205                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1206                         snd_leave_user(fs);
1207                 } else {
1208                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1209                 }
1210                 if (ret == -EPIPE) {
1211                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1212                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1213                                 if (ret < 0)
1214                                         break;
1215                         }
1216                         continue;
1217                 }
1218                 if (ret != -ESTRPIPE)
1219                         break;
1220         }
1221         return ret;
1222 }
1223
1224 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1225 {
1226         struct snd_pcm_runtime *runtime = substream->runtime;
1227         int ret;
1228         while (1) {
1229                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1230                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1231 #ifdef OSS_DEBUG
1232                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1233                                 printk("pcm_oss: writev: recovering from XRUN\n");
1234                         else
1235                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
1236 #endif
1237                         ret = snd_pcm_oss_prepare(substream);
1238                         if (ret < 0)
1239                                 break;
1240                 }
1241                 if (in_kernel) {
1242                         mm_segment_t fs;
1243                         fs = snd_enter_user();
1244                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1245                         snd_leave_user(fs);
1246                 } else {
1247                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1248                 }
1249                 if (ret != -EPIPE && ret != -ESTRPIPE)
1250                         break;
1251
1252                 /* test, if we can't store new data, because the stream */
1253                 /* has not been started */
1254                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1255                         return -EAGAIN;
1256         }
1257         return ret;
1258 }
1259         
1260 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1261 {
1262         struct snd_pcm_runtime *runtime = substream->runtime;
1263         int ret;
1264         while (1) {
1265                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1266                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1267 #ifdef OSS_DEBUG
1268                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1269                                 printk("pcm_oss: readv: recovering from XRUN\n");
1270                         else
1271                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
1272 #endif
1273                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1274                         if (ret < 0)
1275                                 break;
1276                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1277                         ret = snd_pcm_oss_prepare(substream);
1278                         if (ret < 0)
1279                                 break;
1280                 }
1281                 if (in_kernel) {
1282                         mm_segment_t fs;
1283                         fs = snd_enter_user();
1284                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1285                         snd_leave_user(fs);
1286                 } else {
1287                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1288                 }
1289                 if (ret != -EPIPE && ret != -ESTRPIPE)
1290                         break;
1291         }
1292         return ret;
1293 }
1294
1295 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1296 {
1297         struct snd_pcm_runtime *runtime = substream->runtime;
1298         snd_pcm_sframes_t frames, frames1;
1299 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1300         if (runtime->oss.plugin_first) {
1301                 struct snd_pcm_plugin_channel *channels;
1302                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1303                 if (!in_kernel) {
1304                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1305                                 return -EFAULT;
1306                         buf = runtime->oss.buffer;
1307                 }
1308                 frames = bytes / oss_frame_bytes;
1309                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1310                 if (frames1 < 0)
1311                         return frames1;
1312                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1313                 if (frames1 <= 0)
1314                         return frames1;
1315                 bytes = frames1 * oss_frame_bytes;
1316         } else
1317 #endif
1318         {
1319                 frames = bytes_to_frames(runtime, bytes);
1320                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1321                 if (frames1 <= 0)
1322                         return frames1;
1323                 bytes = frames_to_bytes(runtime, frames1);
1324         }
1325         return bytes;
1326 }
1327
1328 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1329 {
1330         size_t xfer = 0;
1331         ssize_t tmp;
1332         struct snd_pcm_runtime *runtime = substream->runtime;
1333
1334         if (atomic_read(&substream->mmap_count))
1335                 return -ENXIO;
1336
1337         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1338                 return tmp;
1339         mutex_lock(&runtime->oss.params_lock);
1340         while (bytes > 0) {
1341                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1342                         tmp = bytes;
1343                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1344                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1345                         if (tmp > 0) {
1346                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1347                                         tmp = -EFAULT;
1348                                         goto err;
1349                                 }
1350                         }
1351                         runtime->oss.buffer_used += tmp;
1352                         buf += tmp;
1353                         bytes -= tmp;
1354                         xfer += tmp;
1355                         if (substream->oss.setup.partialfrag ||
1356                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
1357                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 
1358                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1359                                 if (tmp <= 0)
1360                                         goto err;
1361                                 runtime->oss.bytes += tmp;
1362                                 runtime->oss.period_ptr += tmp;
1363                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1364                                 if (runtime->oss.period_ptr == 0 ||
1365                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
1366                                         runtime->oss.buffer_used = 0;
1367                                 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1368                                         tmp = -EAGAIN;
1369                                         goto err;
1370                                 }
1371                         }
1372                 } else {
1373                         tmp = snd_pcm_oss_write2(substream,
1374                                                  (const char __force *)buf,
1375                                                  runtime->oss.period_bytes, 0);
1376                         if (tmp <= 0)
1377                                 goto err;
1378                         runtime->oss.bytes += tmp;
1379                         buf += tmp;
1380                         bytes -= tmp;
1381                         xfer += tmp;
1382                         if ((substream->f_flags & O_NONBLOCK) != 0 &&
1383                             tmp != runtime->oss.period_bytes)
1384                                 break;
1385                 }
1386         }
1387         mutex_unlock(&runtime->oss.params_lock);
1388         return xfer;
1389
1390  err:
1391         mutex_unlock(&runtime->oss.params_lock);
1392         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1393 }
1394
1395 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1396 {
1397         struct snd_pcm_runtime *runtime = substream->runtime;
1398         snd_pcm_sframes_t frames, frames1;
1399 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1400         char __user *final_dst = (char __user *)buf;
1401         if (runtime->oss.plugin_first) {
1402                 struct snd_pcm_plugin_channel *channels;
1403                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1404                 if (!in_kernel)
1405                         buf = runtime->oss.buffer;
1406                 frames = bytes / oss_frame_bytes;
1407                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1408                 if (frames1 < 0)
1409                         return frames1;
1410                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1411                 if (frames1 <= 0)
1412                         return frames1;
1413                 bytes = frames1 * oss_frame_bytes;
1414                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1415                         return -EFAULT;
1416         } else
1417 #endif
1418         {
1419                 frames = bytes_to_frames(runtime, bytes);
1420                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1421                 if (frames1 <= 0)
1422                         return frames1;
1423                 bytes = frames_to_bytes(runtime, frames1);
1424         }
1425         return bytes;
1426 }
1427
1428 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1429 {
1430         size_t xfer = 0;
1431         ssize_t tmp;
1432         struct snd_pcm_runtime *runtime = substream->runtime;
1433
1434         if (atomic_read(&substream->mmap_count))
1435                 return -ENXIO;
1436
1437         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1438                 return tmp;
1439         mutex_lock(&runtime->oss.params_lock);
1440         while (bytes > 0) {
1441                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1442                         if (runtime->oss.buffer_used == 0) {
1443                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1444                                 if (tmp <= 0)
1445                                         goto err;
1446                                 runtime->oss.bytes += tmp;
1447                                 runtime->oss.period_ptr = tmp;
1448                                 runtime->oss.buffer_used = tmp;
1449                         }
1450                         tmp = bytes;
1451                         if ((size_t) tmp > runtime->oss.buffer_used)
1452                                 tmp = runtime->oss.buffer_used;
1453                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1454                                 tmp = -EFAULT;
1455                                 goto err;
1456                         }
1457                         buf += tmp;
1458                         bytes -= tmp;
1459                         xfer += tmp;
1460                         runtime->oss.buffer_used -= tmp;
1461                 } else {
1462                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1463                                                 runtime->oss.period_bytes, 0);
1464                         if (tmp <= 0)
1465                                 goto err;
1466                         runtime->oss.bytes += tmp;
1467                         buf += tmp;
1468                         bytes -= tmp;
1469                         xfer += tmp;
1470                 }
1471         }
1472         mutex_unlock(&runtime->oss.params_lock);
1473         return xfer;
1474
1475  err:
1476         mutex_unlock(&runtime->oss.params_lock);
1477         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1478 }
1479
1480 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1481 {
1482         struct snd_pcm_substream *substream;
1483
1484         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1485         if (substream != NULL) {
1486                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1487                 substream->runtime->oss.prepare = 1;
1488         }
1489         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1490         if (substream != NULL) {
1491                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1492                 substream->runtime->oss.prepare = 1;
1493         }
1494         return 0;
1495 }
1496
1497 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1498 {
1499         struct snd_pcm_substream *substream;
1500         int err;
1501
1502         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1503         if (substream != NULL) {
1504                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1505                         return err;
1506                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1507         }
1508         /* note: all errors from the start action are ignored */
1509         /* OSS apps do not know, how to handle them */
1510         return 0;
1511 }
1512
1513 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1514 {
1515         struct snd_pcm_runtime *runtime;
1516         ssize_t result = 0;
1517         long res;
1518         wait_queue_t wait;
1519
1520         runtime = substream->runtime;
1521         init_waitqueue_entry(&wait, current);
1522         add_wait_queue(&runtime->sleep, &wait);
1523 #ifdef OSS_DEBUG
1524         printk("sync1: size = %li\n", size);
1525 #endif
1526         while (1) {
1527                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1528                 if (result > 0) {
1529                         runtime->oss.buffer_used = 0;
1530                         result = 0;
1531                         break;
1532                 }
1533                 if (result != 0 && result != -EAGAIN)
1534                         break;
1535                 result = 0;
1536                 set_current_state(TASK_INTERRUPTIBLE);
1537                 snd_pcm_stream_lock_irq(substream);
1538                 res = runtime->status->state;
1539                 snd_pcm_stream_unlock_irq(substream);
1540                 if (res != SNDRV_PCM_STATE_RUNNING) {
1541                         set_current_state(TASK_RUNNING);
1542                         break;
1543                 }
1544                 res = schedule_timeout(10 * HZ);
1545                 if (signal_pending(current)) {
1546                         result = -ERESTARTSYS;
1547                         break;
1548                 }
1549                 if (res == 0) {
1550                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1551                         result = -EIO;
1552                         break;
1553                 }
1554         }
1555         remove_wait_queue(&runtime->sleep, &wait);
1556         return result;
1557 }
1558
1559 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1560 {
1561         int err = 0;
1562         unsigned int saved_f_flags;
1563         struct snd_pcm_substream *substream;
1564         struct snd_pcm_runtime *runtime;
1565         snd_pcm_format_t format;
1566         unsigned long width;
1567         size_t size;
1568
1569         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1570         if (substream != NULL) {
1571                 runtime = substream->runtime;
1572                 if (atomic_read(&substream->mmap_count))
1573                         goto __direct;
1574                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1575                         return err;
1576                 format = snd_pcm_oss_format_from(runtime->oss.format);
1577                 width = snd_pcm_format_physical_width(format);
1578                 mutex_lock(&runtime->oss.params_lock);
1579                 if (runtime->oss.buffer_used > 0) {
1580 #ifdef OSS_DEBUG
1581                         printk("sync: buffer_used\n");
1582 #endif
1583                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1584                         snd_pcm_format_set_silence(format,
1585                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1586                                                    size);
1587                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1588                         if (err < 0) {
1589                                 mutex_unlock(&runtime->oss.params_lock);
1590                                 return err;
1591                         }
1592                 } else if (runtime->oss.period_ptr > 0) {
1593 #ifdef OSS_DEBUG
1594                         printk("sync: period_ptr\n");
1595 #endif
1596                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1597                         snd_pcm_format_set_silence(format,
1598                                                    runtime->oss.buffer,
1599                                                    size * 8 / width);
1600                         err = snd_pcm_oss_sync1(substream, size);
1601                         if (err < 0) {
1602                                 mutex_unlock(&runtime->oss.params_lock);
1603                                 return err;
1604                         }
1605                 }
1606                 /*
1607                  * The ALSA's period might be a bit large than OSS one.
1608                  * Fill the remain portion of ALSA period with zeros.
1609                  */
1610                 size = runtime->control->appl_ptr % runtime->period_size;
1611                 if (size > 0) {
1612                         size = runtime->period_size - size;
1613                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1614                                 size = (runtime->frame_bits * size) / 8;
1615                                 while (size > 0) {
1616                                         mm_segment_t fs;
1617                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1618                                         size -= size1;
1619                                         size1 *= 8;
1620                                         size1 /= runtime->sample_bits;
1621                                         snd_pcm_format_set_silence(runtime->format,
1622                                                                    runtime->oss.buffer,
1623                                                                    size1);
1624                                         fs = snd_enter_user();
1625                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1626                                         snd_leave_user(fs);
1627                                 }
1628                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1629                                 void __user *buffers[runtime->channels];
1630                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1631                                 snd_pcm_lib_writev(substream, buffers, size);
1632                         }
1633                 }
1634                 mutex_unlock(&runtime->oss.params_lock);
1635                 /*
1636                  * finish sync: drain the buffer
1637                  */
1638               __direct:
1639                 saved_f_flags = substream->f_flags;
1640                 substream->f_flags &= ~O_NONBLOCK;
1641                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1642                 substream->f_flags = saved_f_flags;
1643                 if (err < 0)
1644                         return err;
1645                 runtime->oss.prepare = 1;
1646         }
1647
1648         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1649         if (substream != NULL) {
1650                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1651                         return err;
1652                 runtime = substream->runtime;
1653                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1654                 if (err < 0)
1655                         return err;
1656                 runtime->oss.buffer_used = 0;
1657                 runtime->oss.prepare = 1;
1658         }
1659         return 0;
1660 }
1661
1662 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1663 {
1664         int idx;
1665
1666         for (idx = 1; idx >= 0; --idx) {
1667                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1668                 struct snd_pcm_runtime *runtime;
1669                 if (substream == NULL)
1670                         continue;
1671                 runtime = substream->runtime;
1672                 if (rate < 1000)
1673                         rate = 1000;
1674                 else if (rate > 192000)
1675                         rate = 192000;
1676                 if (runtime->oss.rate != rate) {
1677                         runtime->oss.params = 1;
1678                         runtime->oss.rate = rate;
1679                 }
1680         }
1681         return snd_pcm_oss_get_rate(pcm_oss_file);
1682 }
1683
1684 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1685 {
1686         struct snd_pcm_substream *substream;
1687         int err;
1688         
1689         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1690                 return err;
1691         return substream->runtime->oss.rate;
1692 }
1693
1694 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1695 {
1696         int idx;
1697         if (channels < 1)
1698                 channels = 1;
1699         if (channels > 128)
1700                 return -EINVAL;
1701         for (idx = 1; idx >= 0; --idx) {
1702                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1703                 struct snd_pcm_runtime *runtime;
1704                 if (substream == NULL)
1705                         continue;
1706                 runtime = substream->runtime;
1707                 if (runtime->oss.channels != channels) {
1708                         runtime->oss.params = 1;
1709                         runtime->oss.channels = channels;
1710                 }
1711         }
1712         return snd_pcm_oss_get_channels(pcm_oss_file);
1713 }
1714
1715 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1716 {
1717         struct snd_pcm_substream *substream;
1718         int err;
1719         
1720         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1721                 return err;
1722         return substream->runtime->oss.channels;
1723 }
1724
1725 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1726 {
1727         struct snd_pcm_substream *substream;
1728         int err;
1729         
1730         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1731                 return err;
1732         return substream->runtime->oss.period_bytes;
1733 }
1734
1735 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1736 {
1737         struct snd_pcm_substream *substream;
1738         int err;
1739         int direct;
1740         struct snd_pcm_hw_params *params;
1741         unsigned int formats = 0;
1742         struct snd_mask format_mask;
1743         int fmt;
1744
1745         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1746                 return err;
1747         if (atomic_read(&substream->mmap_count))
1748                 direct = 1;
1749         else
1750                 direct = substream->oss.setup.direct;
1751         if (!direct)
1752                 return AFMT_MU_LAW | AFMT_U8 |
1753                        AFMT_S16_LE | AFMT_S16_BE |
1754                        AFMT_S8 | AFMT_U16_LE |
1755                        AFMT_U16_BE |
1756                         AFMT_S32_LE | AFMT_S32_BE |
1757                         AFMT_S24_LE | AFMT_S24_LE |
1758                         AFMT_S24_PACKED;
1759         params = kmalloc(sizeof(*params), GFP_KERNEL);
1760         if (!params)
1761                 return -ENOMEM;
1762         _snd_pcm_hw_params_any(params);
1763         err = snd_pcm_hw_refine(substream, params);
1764         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 
1765         kfree(params);
1766         snd_assert(err >= 0, return err);
1767         for (fmt = 0; fmt < 32; ++fmt) {
1768                 if (snd_mask_test(&format_mask, fmt)) {
1769                         int f = snd_pcm_oss_format_to(fmt);
1770                         if (f >= 0)
1771                                 formats |= f;
1772                 }
1773         }
1774         return formats;
1775 }
1776
1777 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1778 {
1779         int formats, idx;
1780         
1781         if (format != AFMT_QUERY) {
1782                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1783                 if (formats < 0)
1784                         return formats;
1785                 if (!(formats & format))
1786                         format = AFMT_U8;
1787                 for (idx = 1; idx >= 0; --idx) {
1788                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1789                         struct snd_pcm_runtime *runtime;
1790                         if (substream == NULL)
1791                                 continue;
1792                         runtime = substream->runtime;
1793                         if (runtime->oss.format != format) {
1794                                 runtime->oss.params = 1;
1795                                 runtime->oss.format = format;
1796                         }
1797                 }
1798         }
1799         return snd_pcm_oss_get_format(pcm_oss_file);
1800 }
1801
1802 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1803 {
1804         struct snd_pcm_substream *substream;
1805         int err;
1806         
1807         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1808                 return err;
1809         return substream->runtime->oss.format;
1810 }
1811
1812 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1813 {
1814         struct snd_pcm_runtime *runtime;
1815
1816         if (substream == NULL)
1817                 return 0;
1818         runtime = substream->runtime;
1819         if (subdivide == 0) {
1820                 subdivide = runtime->oss.subdivision;
1821                 if (subdivide == 0)
1822                         subdivide = 1;
1823                 return subdivide;
1824         }
1825         if (runtime->oss.subdivision || runtime->oss.fragshift)
1826                 return -EINVAL;
1827         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1828             subdivide != 8 && subdivide != 16)
1829                 return -EINVAL;
1830         runtime->oss.subdivision = subdivide;
1831         runtime->oss.params = 1;
1832         return subdivide;
1833 }
1834
1835 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1836 {
1837         int err = -EINVAL, idx;
1838
1839         for (idx = 1; idx >= 0; --idx) {
1840                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1841                 if (substream == NULL)
1842                         continue;
1843                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1844                         return err;
1845         }
1846         return err;
1847 }
1848
1849 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1850 {
1851         struct snd_pcm_runtime *runtime;
1852
1853         if (substream == NULL)
1854                 return 0;
1855         runtime = substream->runtime;
1856         if (runtime->oss.subdivision || runtime->oss.fragshift)
1857                 return -EINVAL;
1858         runtime->oss.fragshift = val & 0xffff;
1859         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1860         if (runtime->oss.fragshift < 4)         /* < 16 */
1861                 runtime->oss.fragshift = 4;
1862         if (runtime->oss.maxfrags < 2)
1863                 runtime->oss.maxfrags = 2;
1864         runtime->oss.params = 1;
1865         return 0;
1866 }
1867
1868 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1869 {
1870         int err = -EINVAL, idx;
1871
1872         for (idx = 1; idx >= 0; --idx) {
1873                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1874                 if (substream == NULL)
1875                         continue;
1876                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1877                         return err;
1878         }
1879         return err;
1880 }
1881
1882 static int snd_pcm_oss_nonblock(struct file * file)
1883 {
1884         file->f_flags |= O_NONBLOCK;
1885         return 0;
1886 }
1887
1888 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1889 {
1890
1891         if (substream == NULL) {
1892                 res &= ~DSP_CAP_DUPLEX;
1893                 return res;
1894         }
1895 #ifdef DSP_CAP_MULTI
1896         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1897                 if (substream->pstr->substream_count > 1)
1898                         res |= DSP_CAP_MULTI;
1899 #endif
1900         /* DSP_CAP_REALTIME is set all times: */
1901         /* all ALSA drivers can return actual pointer in ring buffer */
1902 #if defined(DSP_CAP_REALTIME) && 0
1903         {
1904                 struct snd_pcm_runtime *runtime = substream->runtime;
1905                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1906                         res &= ~DSP_CAP_REALTIME;
1907         }
1908 #endif
1909         return res;
1910 }
1911
1912 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1913 {
1914         int result, idx;
1915         
1916         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1917         for (idx = 0; idx < 2; idx++) {
1918                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1919                 result = snd_pcm_oss_get_caps1(substream, result);
1920         }
1921         result |= 0x0001;       /* revision - same as SB AWE 64 */
1922         return result;
1923 }
1924
1925 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1926 {
1927         struct snd_pcm_runtime *runtime = substream->runtime;
1928         snd_pcm_uframes_t appl_ptr;
1929         appl_ptr = hw_ptr + runtime->buffer_size;
1930         appl_ptr %= runtime->boundary;
1931         runtime->control->appl_ptr = appl_ptr;
1932 }
1933
1934 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1935 {
1936         struct snd_pcm_runtime *runtime;
1937         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1938         int err, cmd;
1939
1940 #ifdef OSS_DEBUG
1941         printk("pcm_oss: trigger = 0x%x\n", trigger);
1942 #endif
1943         
1944         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1945         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1946
1947         if (psubstream) {
1948                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1949                         return err;
1950         }
1951         if (csubstream) {
1952                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1953                         return err;
1954         }
1955         if (psubstream) {
1956                 runtime = psubstream->runtime;
1957                 if (trigger & PCM_ENABLE_OUTPUT) {
1958                         if (runtime->oss.trigger)
1959                                 goto _skip1;
1960                         if (atomic_read(&psubstream->mmap_count))
1961                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1962                         runtime->oss.trigger = 1;
1963                         runtime->start_threshold = 1;
1964                         cmd = SNDRV_PCM_IOCTL_START;
1965                 } else {
1966                         if (!runtime->oss.trigger)
1967                                 goto _skip1;
1968                         runtime->oss.trigger = 0;
1969                         runtime->start_threshold = runtime->boundary;
1970                         cmd = SNDRV_PCM_IOCTL_DROP;
1971                         runtime->oss.prepare = 1;
1972                 }
1973                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1974                 if (err < 0)
1975                         return err;
1976         }
1977  _skip1:
1978         if (csubstream) {
1979                 runtime = csubstream->runtime;
1980                 if (trigger & PCM_ENABLE_INPUT) {
1981                         if (runtime->oss.trigger)
1982                                 goto _skip2;
1983                         runtime->oss.trigger = 1;
1984                         runtime->start_threshold = 1;
1985                         cmd = SNDRV_PCM_IOCTL_START;
1986                 } else {
1987                         if (!runtime->oss.trigger)
1988                                 goto _skip2;
1989                         runtime->oss.trigger = 0;
1990                         runtime->start_threshold = runtime->boundary;
1991                         cmd = SNDRV_PCM_IOCTL_DROP;
1992                         runtime->oss.prepare = 1;
1993                 }
1994                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1995                 if (err < 0)
1996                         return err;
1997         }
1998  _skip2:
1999         return 0;
2000 }
2001
2002 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2003 {
2004         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2005         int result = 0;
2006
2007         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2008         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2009         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2010                 result |= PCM_ENABLE_OUTPUT;
2011         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2012                 result |= PCM_ENABLE_INPUT;
2013         return result;
2014 }
2015
2016 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2017 {
2018         struct snd_pcm_substream *substream;
2019         struct snd_pcm_runtime *runtime;
2020         snd_pcm_sframes_t delay;
2021         int err;
2022
2023         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2024         if (substream == NULL)
2025                 return -EINVAL;
2026         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2027                 return err;
2028         runtime = substream->runtime;
2029         if (runtime->oss.params || runtime->oss.prepare)
2030                 return 0;
2031         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2032         if (err == -EPIPE)
2033                 delay = 0;      /* hack for broken OSS applications */
2034         else if (err < 0)
2035                 return err;
2036         return snd_pcm_oss_bytes(substream, delay);
2037 }
2038
2039 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2040 {       
2041         struct snd_pcm_substream *substream;
2042         struct snd_pcm_runtime *runtime;
2043         snd_pcm_sframes_t delay;
2044         int fixup;
2045         struct count_info info;
2046         int err;
2047
2048         if (_info == NULL)
2049                 return -EFAULT;
2050         substream = pcm_oss_file->streams[stream];
2051         if (substream == NULL)
2052                 return -EINVAL;
2053         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2054                 return err;
2055         runtime = substream->runtime;
2056         if (runtime->oss.params || runtime->oss.prepare) {
2057                 memset(&info, 0, sizeof(info));
2058                 if (copy_to_user(_info, &info, sizeof(info)))
2059                         return -EFAULT;
2060                 return 0;
2061         }
2062         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2063                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2064                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2065                         err = 0;
2066                         delay = 0;
2067                         fixup = 0;
2068                 } else {
2069                         fixup = runtime->oss.buffer_used;
2070                 }
2071         } else {
2072                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2073                 fixup = -runtime->oss.buffer_used;
2074         }
2075         if (err < 0)
2076                 return err;
2077         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2078         if (atomic_read(&substream->mmap_count)) {
2079                 snd_pcm_sframes_t n;
2080                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2081                 if (n < 0)
2082                         n += runtime->boundary;
2083                 info.blocks = n / runtime->period_size;
2084                 runtime->oss.prev_hw_ptr_interrupt = delay;
2085                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2086                         snd_pcm_oss_simulate_fill(substream, delay);
2087                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2088         } else {
2089                 delay = snd_pcm_oss_bytes(substream, delay);
2090                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2091                         if (substream->oss.setup.buggyptr)
2092                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2093                         else
2094                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2095                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2096                 } else {
2097                         delay += fixup;
2098                         info.blocks = delay / runtime->oss.period_bytes;
2099                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2100                 }
2101         }
2102         if (copy_to_user(_info, &info, sizeof(info)))
2103                 return -EFAULT;
2104         return 0;
2105 }
2106
2107 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2108 {
2109         struct snd_pcm_substream *substream;
2110         struct snd_pcm_runtime *runtime;
2111         snd_pcm_sframes_t avail;
2112         int fixup;
2113         struct audio_buf_info info;
2114         int err;
2115
2116         if (_info == NULL)
2117                 return -EFAULT;
2118         substream = pcm_oss_file->streams[stream];
2119         if (substream == NULL)
2120                 return -EINVAL;
2121         runtime = substream->runtime;
2122
2123         if (runtime->oss.params &&
2124             (err = snd_pcm_oss_change_params(substream)) < 0)
2125                 return err;
2126
2127         info.fragsize = runtime->oss.period_bytes;
2128         info.fragstotal = runtime->periods;
2129         if (runtime->oss.prepare) {
2130                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2131                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2132                         info.fragments = runtime->oss.periods;
2133                 } else {
2134                         info.bytes = 0;
2135                         info.fragments = 0;
2136                 }
2137         } else {
2138                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2139                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2140                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2141                                 avail = runtime->buffer_size;
2142                                 err = 0;
2143                                 fixup = 0;
2144                         } else {
2145                                 avail = runtime->buffer_size - avail;
2146                                 fixup = -runtime->oss.buffer_used;
2147                         }
2148                 } else {
2149                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2150                         fixup = runtime->oss.buffer_used;
2151                 }
2152                 if (err < 0)
2153                         return err;
2154                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2155                 info.fragments = info.bytes / runtime->oss.period_bytes;
2156         }
2157
2158 #ifdef OSS_DEBUG
2159         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2160 #endif
2161         if (copy_to_user(_info, &info, sizeof(info)))
2162                 return -EFAULT;
2163         return 0;
2164 }
2165
2166 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2167 {
2168         // it won't be probably implemented
2169         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2170         return -EINVAL;
2171 }
2172
2173 static const char *strip_task_path(const char *path)
2174 {
2175         const char *ptr, *ptrl = NULL;
2176         for (ptr = path; *ptr; ptr++) {
2177                 if (*ptr == '/')
2178                         ptrl = ptr + 1;
2179         }
2180         return ptrl;
2181 }
2182
2183 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2184                                       const char *task_name,
2185                                       struct snd_pcm_oss_setup *rsetup)
2186 {
2187         struct snd_pcm_oss_setup *setup;
2188
2189         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2190         do {
2191                 for (setup = pcm->streams[stream].oss.setup_list; setup;
2192                      setup = setup->next) {
2193                         if (!strcmp(setup->task_name, task_name))
2194                                 goto out;
2195                 }
2196         } while ((task_name = strip_task_path(task_name)) != NULL);
2197  out:
2198         if (setup)
2199                 *rsetup = *setup;
2200         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2201 }
2202
2203 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2204 {
2205         struct snd_pcm_runtime *runtime;
2206         runtime = substream->runtime;
2207         vfree(runtime->oss.buffer);
2208         runtime->oss.buffer = NULL;
2209 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2210         snd_pcm_oss_plugin_clear(substream);
2211 #endif
2212         substream->oss.oss = 0;
2213 }
2214
2215 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2216                                        struct snd_pcm_oss_setup *setup,
2217                                        int minor)
2218 {
2219         struct snd_pcm_runtime *runtime;
2220
2221         substream->oss.oss = 1;
2222         substream->oss.setup = *setup;
2223         if (setup->nonblock)
2224                 substream->f_flags |= O_NONBLOCK;
2225         else if (setup->block)
2226                 substream->f_flags &= ~O_NONBLOCK;
2227         runtime = substream->runtime;
2228         runtime->oss.params = 1;
2229         runtime->oss.trigger = 1;
2230         runtime->oss.rate = 8000;
2231         mutex_init(&runtime->oss.params_lock);
2232         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2233         case SNDRV_MINOR_OSS_PCM_8:
2234                 runtime->oss.format = AFMT_U8;
2235                 break;
2236         case SNDRV_MINOR_OSS_PCM_16:
2237                 runtime->oss.format = AFMT_S16_LE;
2238                 break;
2239         default:
2240                 runtime->oss.format = AFMT_MU_LAW;
2241         }
2242         runtime->oss.channels = 1;
2243         runtime->oss.fragshift = 0;
2244         runtime->oss.maxfrags = 0;
2245         runtime->oss.subdivision = 0;
2246         substream->pcm_release = snd_pcm_oss_release_substream;
2247 }
2248
2249 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2250 {
2251         int cidx;
2252         snd_assert(pcm_oss_file != NULL, return -ENXIO);
2253         for (cidx = 0; cidx < 2; ++cidx) {
2254                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2255                 if (substream)
2256                         snd_pcm_release_substream(substream);
2257         }
2258         kfree(pcm_oss_file);
2259         return 0;
2260 }
2261
2262 static int snd_pcm_oss_open_file(struct file *file,
2263                                  struct snd_pcm *pcm,
2264                                  struct snd_pcm_oss_file **rpcm_oss_file,
2265                                  int minor,
2266                                  struct snd_pcm_oss_setup *setup)
2267 {
2268         int idx, err;
2269         struct snd_pcm_oss_file *pcm_oss_file;
2270         struct snd_pcm_substream *substream;
2271         unsigned int f_mode = file->f_mode;
2272
2273         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2274         *rpcm_oss_file = NULL;
2275
2276         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2277         if (pcm_oss_file == NULL)
2278                 return -ENOMEM;
2279
2280         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2281             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2282                 f_mode = FMODE_WRITE;
2283
2284         file->f_flags &= ~O_APPEND;
2285         for (idx = 0; idx < 2; idx++) {
2286                 if (setup[idx].disable)
2287                         continue;
2288                 if (! pcm->streams[idx].substream_count)
2289                         continue; /* no matching substream */
2290                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2291                         if (! (f_mode & FMODE_WRITE))
2292                                 continue;
2293                 } else {
2294                         if (! (f_mode & FMODE_READ))
2295                                 continue;
2296                 }
2297                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2298                 if (err < 0) {
2299                         snd_pcm_oss_release_file(pcm_oss_file);
2300                         return err;
2301                 }
2302
2303                 pcm_oss_file->streams[idx] = substream;
2304                 substream->file = pcm_oss_file;
2305                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2306         }
2307         
2308         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2309                 snd_pcm_oss_release_file(pcm_oss_file);
2310                 return -EINVAL;
2311         }
2312
2313         file->private_data = pcm_oss_file;
2314         *rpcm_oss_file = pcm_oss_file;
2315         return 0;
2316 }
2317
2318
2319 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2320 {
2321         unsigned int idx;
2322
2323         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2324         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2325                 name[idx] = task->comm[idx];
2326         name[idx] = '\0';
2327         return 0;
2328 }
2329
2330 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2331 {
2332         int err;
2333         char task_name[32];
2334         struct snd_pcm *pcm;
2335         struct snd_pcm_oss_file *pcm_oss_file;
2336         struct snd_pcm_oss_setup setup[2];
2337         int nonblock;
2338         wait_queue_t wait;
2339
2340         pcm = snd_lookup_oss_minor_data(iminor(inode),
2341                                         SNDRV_OSS_DEVICE_TYPE_PCM);
2342         if (pcm == NULL) {
2343                 err = -ENODEV;
2344                 goto __error1;
2345         }
2346         err = snd_card_file_add(pcm->card, file);
2347         if (err < 0)
2348                 goto __error1;
2349         if (!try_module_get(pcm->card->module)) {
2350                 err = -EFAULT;
2351                 goto __error2;
2352         }
2353         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2354                 err = -EFAULT;
2355                 goto __error;
2356         }
2357         memset(setup, 0, sizeof(setup));
2358         if (file->f_mode & FMODE_WRITE)
2359                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2360                                            task_name, &setup[0]);
2361         if (file->f_mode & FMODE_READ)
2362                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2363                                            task_name, &setup[1]);
2364
2365         nonblock = !!(file->f_flags & O_NONBLOCK);
2366         if (!nonblock)
2367                 nonblock = nonblock_open;
2368
2369         init_waitqueue_entry(&wait, current);
2370         add_wait_queue(&pcm->open_wait, &wait);
2371         mutex_lock(&pcm->open_mutex);
2372         while (1) {
2373                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2374                                             iminor(inode), setup);
2375                 if (err >= 0)
2376                         break;
2377                 if (err == -EAGAIN) {
2378                         if (nonblock) {
2379                                 err = -EBUSY;
2380                                 break;
2381                         }
2382                 } else
2383                         break;
2384                 set_current_state(TASK_INTERRUPTIBLE);
2385                 mutex_unlock(&pcm->open_mutex);
2386                 schedule();
2387                 mutex_lock(&pcm->open_mutex);
2388                 if (signal_pending(current)) {
2389                         err = -ERESTARTSYS;
2390                         break;
2391                 }
2392         }
2393         remove_wait_queue(&pcm->open_wait, &wait);
2394         mutex_unlock(&pcm->open_mutex);
2395         if (err < 0)
2396                 goto __error;
2397         return err;
2398
2399       __error:
2400         module_put(pcm->card->module);
2401       __error2:
2402         snd_card_file_remove(pcm->card, file);
2403       __error1:
2404         return err;
2405 }
2406
2407 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2408 {
2409         struct snd_pcm *pcm;
2410         struct snd_pcm_substream *substream;
2411         struct snd_pcm_oss_file *pcm_oss_file;
2412
2413         pcm_oss_file = file->private_data;
2414         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2415         if (substream == NULL)
2416                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2417         snd_assert(substream != NULL, return -ENXIO);
2418         pcm = substream->pcm;
2419         if (!pcm->card->shutdown)
2420                 snd_pcm_oss_sync(pcm_oss_file);
2421         mutex_lock(&pcm->open_mutex);
2422         snd_pcm_oss_release_file(pcm_oss_file);
2423         mutex_unlock(&pcm->open_mutex);
2424         wake_up(&pcm->open_wait);
2425         module_put(pcm->card->module);
2426         snd_card_file_remove(pcm->card, file);
2427         return 0;
2428 }
2429
2430 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2431 {
2432         struct snd_pcm_oss_file *pcm_oss_file;
2433         int __user *p = (int __user *)arg;
2434         int res;
2435
2436         pcm_oss_file = file->private_data;
2437         if (cmd == OSS_GETVERSION)
2438                 return put_user(SNDRV_OSS_VERSION, p);
2439         if (cmd == OSS_ALSAEMULVER)
2440                 return put_user(1, p);
2441 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2442         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
2443                 struct snd_pcm_substream *substream;
2444                 int idx;
2445                 for (idx = 0; idx < 2; ++idx) {
2446                         substream = pcm_oss_file->streams[idx];
2447                         if (substream != NULL)
2448                                 break;
2449                 }
2450                 snd_assert(substream != NULL, return -ENXIO);
2451                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2452         }
2453 #endif
2454         if (((cmd >> 8) & 0xff) != 'P')
2455                 return -EINVAL;
2456 #ifdef OSS_DEBUG
2457         printk("pcm_oss: ioctl = 0x%x\n", cmd);
2458 #endif
2459         switch (cmd) {
2460         case SNDCTL_DSP_RESET:
2461                 return snd_pcm_oss_reset(pcm_oss_file);
2462         case SNDCTL_DSP_SYNC:
2463                 return snd_pcm_oss_sync(pcm_oss_file);
2464         case SNDCTL_DSP_SPEED:
2465                 if (get_user(res, p))
2466                         return -EFAULT;
2467                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2468                         return res;
2469                 return put_user(res, p);
2470         case SOUND_PCM_READ_RATE:
2471                 res = snd_pcm_oss_get_rate(pcm_oss_file);
2472                 if (res < 0)
2473                         return res;
2474                 return put_user(res, p);
2475         case SNDCTL_DSP_STEREO:
2476                 if (get_user(res, p))
2477                         return -EFAULT;
2478                 res = res > 0 ? 2 : 1;
2479                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2480                         return res;
2481                 return put_user(--res, p);
2482         case SNDCTL_DSP_GETBLKSIZE:
2483                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2484                 if (res < 0)
2485                         return res;
2486                 return put_user(res, p);
2487         case SNDCTL_DSP_SETFMT:
2488                 if (get_user(res, p))
2489                         return -EFAULT;
2490                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2491                 if (res < 0)
2492                         return res;
2493                 return put_user(res, p);
2494         case SOUND_PCM_READ_BITS:
2495                 res = snd_pcm_oss_get_format(pcm_oss_file);
2496                 if (res < 0)
2497                         return res;
2498                 return put_user(res, p);
2499         case SNDCTL_DSP_CHANNELS:
2500                 if (get_user(res, p))
2501                         return -EFAULT;
2502                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2503                 if (res < 0)
2504                         return res;
2505                 return put_user(res, p);
2506         case SOUND_PCM_READ_CHANNELS:
2507                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2508                 if (res < 0)
2509                         return res;
2510                 return put_user(res, p);
2511         case SOUND_PCM_WRITE_FILTER:
2512         case SOUND_PCM_READ_FILTER:
2513                 return -EIO;
2514         case SNDCTL_DSP_POST:
2515                 return snd_pcm_oss_post(pcm_oss_file);
2516         case SNDCTL_DSP_SUBDIVIDE:
2517                 if (get_user(res, p))
2518                         return -EFAULT;
2519                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2520                 if (res < 0)
2521                         return res;
2522                 return put_user(res, p);
2523         case SNDCTL_DSP_SETFRAGMENT:
2524                 if (get_user(res, p))
2525                         return -EFAULT;
2526                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2527         case SNDCTL_DSP_GETFMTS:
2528                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2529                 if (res < 0)
2530                         return res;
2531                 return put_user(res, p);
2532         case SNDCTL_DSP_GETOSPACE:
2533         case SNDCTL_DSP_GETISPACE:
2534                 return snd_pcm_oss_get_space(pcm_oss_file,
2535                         cmd == SNDCTL_DSP_GETISPACE ?
2536                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2537                         (struct audio_buf_info __user *) arg);
2538         case SNDCTL_DSP_NONBLOCK:
2539                 return snd_pcm_oss_nonblock(file);
2540         case SNDCTL_DSP_GETCAPS:
2541                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2542                 if (res < 0)
2543                         return res;
2544                 return put_user(res, p);
2545         case SNDCTL_DSP_GETTRIGGER:
2546                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2547                 if (res < 0)
2548                         return res;
2549                 return put_user(res, p);
2550         case SNDCTL_DSP_SETTRIGGER:
2551                 if (get_user(res, p))
2552                         return -EFAULT;
2553                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2554         case SNDCTL_DSP_GETIPTR:
2555         case SNDCTL_DSP_GETOPTR:
2556                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2557                         cmd == SNDCTL_DSP_GETIPTR ?
2558                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2559                         (struct count_info __user *) arg);
2560         case SNDCTL_DSP_MAPINBUF:
2561         case SNDCTL_DSP_MAPOUTBUF:
2562                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2563                         cmd == SNDCTL_DSP_MAPINBUF ?
2564                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2565                         (struct buffmem_desc __user *) arg);
2566         case SNDCTL_DSP_SETSYNCRO:
2567                 /* stop DMA now.. */
2568                 return 0;
2569         case SNDCTL_DSP_SETDUPLEX:
2570                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2571                         return 0;
2572                 return -EIO;
2573         case SNDCTL_DSP_GETODELAY:
2574                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2575                 if (res < 0) {
2576                         /* it's for sure, some broken apps don't check for error codes */
2577                         put_user(0, p);
2578                         return res;
2579                 }
2580                 return put_user(res, p);
2581         case SNDCTL_DSP_PROFILE:
2582                 return 0;       /* silently ignore */
2583         default:
2584                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2585         }
2586         return -EINVAL;
2587 }
2588
2589 #ifdef CONFIG_COMPAT
2590 /* all compatible */
2591 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2592 #else
2593 #define snd_pcm_oss_ioctl_compat        NULL
2594 #endif
2595
2596 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2597 {
2598         struct snd_pcm_oss_file *pcm_oss_file;
2599         struct snd_pcm_substream *substream;
2600
2601         pcm_oss_file = file->private_data;
2602         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2603         if (substream == NULL)
2604                 return -ENXIO;
2605         substream->f_flags = file->f_flags & O_NONBLOCK;
2606 #ifndef OSS_DEBUG
2607         return snd_pcm_oss_read1(substream, buf, count);
2608 #else
2609         {
2610                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2611                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2612                 return res;
2613         }
2614 #endif
2615 }
2616
2617 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2618 {
2619         struct snd_pcm_oss_file *pcm_oss_file;
2620         struct snd_pcm_substream *substream;
2621         long result;
2622
2623         pcm_oss_file = file->private_data;
2624         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2625         if (substream == NULL)
2626                 return -ENXIO;
2627         substream->f_flags = file->f_flags & O_NONBLOCK;
2628         result = snd_pcm_oss_write1(substream, buf, count);
2629 #ifdef OSS_DEBUG
2630         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2631 #endif
2632         return result;
2633 }
2634
2635 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2636 {
2637         struct snd_pcm_runtime *runtime = substream->runtime;
2638         if (atomic_read(&substream->mmap_count))
2639                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2640         else
2641                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2642 }
2643
2644 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2645 {
2646         struct snd_pcm_runtime *runtime = substream->runtime;
2647         if (atomic_read(&substream->mmap_count))
2648                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2649         else
2650                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2651 }
2652
2653 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2654 {
2655         struct snd_pcm_oss_file *pcm_oss_file;
2656         unsigned int mask;
2657         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2658         
2659         pcm_oss_file = file->private_data;
2660
2661         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2662         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2663
2664         mask = 0;
2665         if (psubstream != NULL) {
2666                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2667                 poll_wait(file, &runtime->sleep, wait);
2668                 snd_pcm_stream_lock_irq(psubstream);
2669                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2670                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2671                      snd_pcm_oss_playback_ready(psubstream)))
2672                         mask |= POLLOUT | POLLWRNORM;
2673                 snd_pcm_stream_unlock_irq(psubstream);
2674         }
2675         if (csubstream != NULL) {
2676                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2677                 snd_pcm_state_t ostate;
2678                 poll_wait(file, &runtime->sleep, wait);
2679                 snd_pcm_stream_lock_irq(csubstream);
2680                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2681                     snd_pcm_oss_capture_ready(csubstream))
2682                         mask |= POLLIN | POLLRDNORM;
2683                 snd_pcm_stream_unlock_irq(csubstream);
2684                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2685                         struct snd_pcm_oss_file ofile;
2686                         memset(&ofile, 0, sizeof(ofile));
2687                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2688                         runtime->oss.trigger = 0;
2689                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2690                 }
2691         }
2692
2693         return mask;
2694 }
2695
2696 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2697 {
2698         struct snd_pcm_oss_file *pcm_oss_file;
2699         struct snd_pcm_substream *substream = NULL;
2700         struct snd_pcm_runtime *runtime;
2701         int err;
2702
2703 #ifdef OSS_DEBUG
2704         printk("pcm_oss: mmap begin\n");
2705 #endif
2706         pcm_oss_file = file->private_data;
2707         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2708         case VM_READ | VM_WRITE:
2709                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2710                 if (substream)
2711                         break;
2712                 /* Fall through */
2713         case VM_READ:
2714                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2715                 break;
2716         case VM_WRITE:
2717                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2718                 break;
2719         default:
2720                 return -EINVAL;
2721         }
2722         /* set VM_READ access as well to fix memset() routines that do
2723            reads before writes (to improve performance) */
2724         area->vm_flags |= VM_READ;
2725         if (substream == NULL)
2726                 return -ENXIO;
2727         runtime = substream->runtime;
2728         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2729                 return -EIO;
2730         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2731                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2732         else
2733                 return -EIO;
2734         
2735         if (runtime->oss.params) {
2736                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2737                         return err;
2738         }
2739 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2740         if (runtime->oss.plugin_first != NULL)
2741                 return -EIO;
2742 #endif
2743
2744         if (area->vm_pgoff != 0)
2745                 return -EINVAL;
2746
2747         err = snd_pcm_mmap_data(substream, file, area);
2748         if (err < 0)
2749                 return err;
2750         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2751         runtime->silence_threshold = 0;
2752         runtime->silence_size = 0;
2753 #ifdef OSS_DEBUG
2754         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2755 #endif
2756         /* In mmap mode we never stop */
2757         runtime->stop_threshold = runtime->boundary;
2758
2759         return 0;
2760 }
2761
2762 #ifdef CONFIG_SND_VERBOSE_PROCFS
2763 /*
2764  *  /proc interface
2765  */
2766
2767 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2768                                   struct snd_info_buffer *buffer)
2769 {
2770         struct snd_pcm_str *pstr = entry->private_data;
2771         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2772         mutex_lock(&pstr->oss.setup_mutex);
2773         while (setup) {
2774                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2775                             setup->task_name,
2776                             setup->periods,
2777                             setup->period_size,
2778                             setup->disable ? " disable" : "",
2779                             setup->direct ? " direct" : "",
2780                             setup->block ? " block" : "",
2781                             setup->nonblock ? " non-block" : "",
2782                             setup->partialfrag ? " partial-frag" : "",
2783                             setup->nosilence ? " no-silence" : "");
2784                 setup = setup->next;
2785         }
2786         mutex_unlock(&pstr->oss.setup_mutex);
2787 }
2788
2789 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2790 {
2791         struct snd_pcm_oss_setup *setup, *setupn;
2792
2793         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2794              setup; setup = setupn) {
2795                 setupn = setup->next;
2796                 kfree(setup->task_name);
2797                 kfree(setup);
2798         }
2799         pstr->oss.setup_list = NULL;
2800 }
2801
2802 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2803                                    struct snd_info_buffer *buffer)
2804 {
2805         struct snd_pcm_str *pstr = entry->private_data;
2806         char line[128], str[32], task_name[32], *ptr;
2807         int idx1;
2808         struct snd_pcm_oss_setup *setup, *setup1, template;
2809
2810         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2811                 mutex_lock(&pstr->oss.setup_mutex);
2812                 memset(&template, 0, sizeof(template));
2813                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2814                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2815                         snd_pcm_oss_proc_free_setup_list(pstr);
2816                         mutex_unlock(&pstr->oss.setup_mutex);
2817                         continue;
2818                 }
2819                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2820                         if (!strcmp(setup->task_name, task_name)) {
2821                                 template = *setup;
2822                                 break;
2823                         }
2824                 }
2825                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2826                 template.periods = simple_strtoul(str, NULL, 10);
2827                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2828                 template.period_size = simple_strtoul(str, NULL, 10);
2829                 for (idx1 = 31; idx1 >= 0; idx1--)
2830                         if (template.period_size & (1 << idx1))
2831                                 break;
2832                 for (idx1--; idx1 >= 0; idx1--)
2833                         template.period_size &= ~(1 << idx1);
2834                 do {
2835                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2836                         if (!strcmp(str, "disable")) {
2837                                 template.disable = 1;
2838                         } else if (!strcmp(str, "direct")) {
2839                                 template.direct = 1;
2840                         } else if (!strcmp(str, "block")) {
2841                                 template.block = 1;
2842                         } else if (!strcmp(str, "non-block")) {
2843                                 template.nonblock = 1;
2844                         } else if (!strcmp(str, "partial-frag")) {
2845                                 template.partialfrag = 1;
2846                         } else if (!strcmp(str, "no-silence")) {
2847                                 template.nosilence = 1;
2848                         } else if (!strcmp(str, "buggy-ptr")) {
2849                                 template.buggyptr = 1;
2850                         }
2851                 } while (*str);
2852                 if (setup == NULL) {
2853                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2854                         if (! setup) {
2855                                 buffer->error = -ENOMEM;
2856                                 mutex_lock(&pstr->oss.setup_mutex);
2857                                 return;
2858                         }
2859                         if (pstr->oss.setup_list == NULL)
2860                                 pstr->oss.setup_list = setup;
2861                         else {
2862                                 for (setup1 = pstr->oss.setup_list;
2863                                      setup1->next; setup1 = setup1->next);
2864                                 setup1->next = setup;
2865                         }
2866                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2867                         if (! template.task_name) {
2868                                 kfree(setup);
2869                                 buffer->error = -ENOMEM;
2870                                 mutex_lock(&pstr->oss.setup_mutex);
2871                                 return;
2872                         }
2873                 }
2874                 *setup = template;
2875                 mutex_unlock(&pstr->oss.setup_mutex);
2876         }
2877 }
2878
2879 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2880 {
2881         int stream;
2882         for (stream = 0; stream < 2; ++stream) {
2883                 struct snd_info_entry *entry;
2884                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2885                 if (pstr->substream_count == 0)
2886                         continue;
2887                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2888                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2889                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2890                         entry->c.text.read = snd_pcm_oss_proc_read;
2891                         entry->c.text.write = snd_pcm_oss_proc_write;
2892                         entry->private_data = pstr;
2893                         if (snd_info_register(entry) < 0) {
2894                                 snd_info_free_entry(entry);
2895                                 entry = NULL;
2896                         }
2897                 }
2898                 pstr->oss.proc_entry = entry;
2899         }
2900 }
2901
2902 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2903 {
2904         int stream;
2905         for (stream = 0; stream < 2; ++stream) {
2906                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2907                 snd_info_free_entry(pstr->oss.proc_entry);
2908                 pstr->oss.proc_entry = NULL;
2909                 snd_pcm_oss_proc_free_setup_list(pstr);
2910         }
2911 }
2912 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2913 #define snd_pcm_oss_proc_init(pcm)
2914 #define snd_pcm_oss_proc_done(pcm)
2915 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2916
2917 /*
2918  *  ENTRY functions
2919  */
2920
2921 static const struct file_operations snd_pcm_oss_f_reg =
2922 {
2923         .owner =        THIS_MODULE,
2924         .read =         snd_pcm_oss_read,
2925         .write =        snd_pcm_oss_write,
2926         .open =         snd_pcm_oss_open,
2927         .release =      snd_pcm_oss_release,
2928         .poll =         snd_pcm_oss_poll,
2929         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2930         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2931         .mmap =         snd_pcm_oss_mmap,
2932 };
2933
2934 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2935 {
2936         char name[128];
2937         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2938         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2939                                     pcm->card, index, &snd_pcm_oss_f_reg,
2940                                     pcm, name) < 0) {
2941                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2942                            pcm->card->number, pcm->device);
2943         }
2944 }
2945
2946 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2947 {
2948         pcm->oss.reg = 0;
2949         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2950                 char name[128];
2951                 int duplex;
2952                 register_oss_dsp(pcm, 0);
2953                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 
2954                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 
2955                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2956                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2957 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2958                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2959                                       pcm->card->number,
2960                                       name);
2961 #endif
2962                 pcm->oss.reg++;
2963                 pcm->oss.reg_mask |= 1;
2964         }
2965         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2966                 register_oss_dsp(pcm, 1);
2967                 pcm->oss.reg++;
2968                 pcm->oss.reg_mask |= 2;
2969         }
2970
2971         if (pcm->oss.reg)
2972                 snd_pcm_oss_proc_init(pcm);
2973
2974         return 0;
2975 }
2976
2977 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2978 {
2979         if (pcm->oss.reg) {
2980                 if (pcm->oss.reg_mask & 1) {
2981                         pcm->oss.reg_mask &= ~1;
2982                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2983                                                   pcm->card, 0);
2984                 }
2985                 if (pcm->oss.reg_mask & 2) {
2986                         pcm->oss.reg_mask &= ~2;
2987                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2988                                                   pcm->card, 1);
2989                 }
2990                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2991 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2992                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2993 #endif
2994                 }
2995                 pcm->oss.reg = 0;
2996         }
2997         return 0;
2998 }
2999
3000 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3001 {
3002         snd_pcm_oss_disconnect_minor(pcm);
3003         snd_pcm_oss_proc_done(pcm);
3004         return 0;
3005 }
3006
3007 static struct snd_pcm_notify snd_pcm_oss_notify =
3008 {
3009         .n_register =   snd_pcm_oss_register_minor,
3010         .n_disconnect = snd_pcm_oss_disconnect_minor,
3011         .n_unregister = snd_pcm_oss_unregister_minor,
3012 };
3013
3014 static int __init alsa_pcm_oss_init(void)
3015 {
3016         int i;
3017         int err;
3018
3019         /* check device map table */
3020         for (i = 0; i < SNDRV_CARDS; i++) {
3021                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3022                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3023                                    i, dsp_map[i]);
3024                         dsp_map[i] = 0;
3025                 }
3026                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3027                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3028                                    i, adsp_map[i]);
3029                         adsp_map[i] = 1;
3030                 }
3031         }
3032         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3033                 return err;
3034         return 0;
3035 }
3036
3037 static void __exit alsa_pcm_oss_exit(void)
3038 {
3039         snd_pcm_notify(&snd_pcm_oss_notify, 1);
3040 }
3041
3042 module_init(alsa_pcm_oss_init)
3043 module_exit(alsa_pcm_oss_exit)