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allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / sound / core / oss / pcm_oss.c
blobfc11572c48cf8038b52d329f9aa12d7ec047f9ca
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/time.h>
33 #include <linux/vmalloc.h>
34 #include <linux/moduleparam.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44
45 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47 static int dsp_map[SNDRV_CARDS];
48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49 static int nonblock_open = 1;
50
51 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53 MODULE_LICENSE("GPL");
54 module_param_array(dsp_map, int, NULL, 0444);
55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56 module_param_array(adsp_map, int, NULL, 0444);
57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58 module_param(nonblock_open, bool, 0644);
59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 /*
81 * helper functions to process hw_params
82 */
83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84 {
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105 }
106
107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108 {
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129 }
130
131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132 {
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139 }
140
141 /**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149 static unsigned int
150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152 {
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165 }
166
167 /**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175 static unsigned int
176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178 {
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191 }
192
193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196 {
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204 }
205
206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210 {
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220 }
221
222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225 {
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251 }
252
253 /**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269 {
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279 }
280
281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284 {
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312 }
313
314 /**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330 {
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340 }
341
342 static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345 {
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356 }
357
358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360 {
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372 }
373
374 /* Return 1 if min is nearer to best than max */
375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378 {
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384 }
385
386 /**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404 {
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 snd_assert(max >= 0, return -EINVAL);
457 last = 1;
458 }
459 _end:
460 kfree(save);
461 if (last)
462 v = snd_pcm_hw_param_last(pcm, params, var, dir);
463 else
464 v = snd_pcm_hw_param_first(pcm, params, var, dir);
465 snd_assert(v >= 0, return -EINVAL);
466 return v;
467 }
468
469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
470 snd_pcm_hw_param_t var, unsigned int val,
471 int dir)
472 {
473 int changed;
474 if (hw_is_mask(var)) {
475 struct snd_mask *m = hw_param_mask(params, var);
476 if (val == 0 && dir < 0) {
477 changed = -EINVAL;
478 snd_mask_none(m);
479 } else {
480 if (dir > 0)
481 val++;
482 else if (dir < 0)
483 val--;
484 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
485 }
486 } else if (hw_is_interval(var)) {
487 struct snd_interval *i = hw_param_interval(params, var);
488 if (val == 0 && dir < 0) {
489 changed = -EINVAL;
490 snd_interval_none(i);
491 } else if (dir == 0)
492 changed = snd_interval_refine_set(i, val);
493 else {
494 struct snd_interval t;
495 t.openmin = 1;
496 t.openmax = 1;
497 t.empty = 0;
498 t.integer = 0;
499 if (dir < 0) {
500 t.min = val - 1;
501 t.max = val;
502 } else {
503 t.min = val;
504 t.max = val+1;
505 }
506 changed = snd_interval_refine(i, &t);
507 }
508 } else
509 return -EINVAL;
510 if (changed) {
511 params->cmask |= 1 << var;
512 params->rmask |= 1 << var;
513 }
514 return changed;
515 }
516
517 /**
518 * snd_pcm_hw_param_set
519 * @pcm: PCM instance
520 * @params: the hw_params instance
521 * @var: parameter to retrieve
522 * @val: value to set
523 * @dir: pointer to the direction (-1,0,1) or NULL
524 *
525 * Inside configuration space defined by PARAMS remove from PAR all
526 * values != VAL. Reduce configuration space accordingly.
527 * Return VAL or -EINVAL if the configuration space is empty
528 */
529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
530 struct snd_pcm_hw_params *params,
531 snd_pcm_hw_param_t var, unsigned int val,
532 int dir)
533 {
534 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
535 if (changed < 0)
536 return changed;
537 if (params->rmask) {
538 int err = snd_pcm_hw_refine(pcm, params);
539 if (err < 0)
540 return err;
541 }
542 return snd_pcm_hw_param_value(params, var, NULL);
543 }
544
545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
546 snd_pcm_hw_param_t var)
547 {
548 int changed;
549 changed = snd_interval_setinteger(hw_param_interval(params, var));
550 if (changed) {
551 params->cmask |= 1 << var;
552 params->rmask |= 1 << var;
553 }
554 return changed;
555 }
556
557 /*
558 * plugin
559 */
560
561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
563 {
564 struct snd_pcm_runtime *runtime = substream->runtime;
565 struct snd_pcm_plugin *plugin, *next;
566
567 plugin = runtime->oss.plugin_first;
568 while (plugin) {
569 next = plugin->next;
570 snd_pcm_plugin_free(plugin);
571 plugin = next;
572 }
573 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
574 return 0;
575 }
576
577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
578 {
579 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
580 plugin->next = runtime->oss.plugin_first;
581 plugin->prev = NULL;
582 if (runtime->oss.plugin_first) {
583 runtime->oss.plugin_first->prev = plugin;
584 runtime->oss.plugin_first = plugin;
585 } else {
586 runtime->oss.plugin_last =
587 runtime->oss.plugin_first = plugin;
588 }
589 return 0;
590 }
591
592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
593 {
594 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
595 plugin->next = NULL;
596 plugin->prev = runtime->oss.plugin_last;
597 if (runtime->oss.plugin_last) {
598 runtime->oss.plugin_last->next = plugin;
599 runtime->oss.plugin_last = plugin;
600 } else {
601 runtime->oss.plugin_last =
602 runtime->oss.plugin_first = plugin;
603 }
604 return 0;
605 }
606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
607
608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
609 {
610 struct snd_pcm_runtime *runtime = substream->runtime;
611 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
612 long bytes = frames_to_bytes(runtime, frames);
613 if (buffer_size == runtime->oss.buffer_bytes)
614 return bytes;
615 #if BITS_PER_LONG >= 64
616 return runtime->oss.buffer_bytes * bytes / buffer_size;
617 #else
618 {
619 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
620 u32 rem;
621 div64_32(&bsize, buffer_size, &rem);
622 return (long)bsize;
623 }
624 #endif
625 }
626
627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
628 {
629 struct snd_pcm_runtime *runtime = substream->runtime;
630 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
631 if (buffer_size == runtime->oss.buffer_bytes)
632 return bytes_to_frames(runtime, bytes);
633 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
634 }
635
636 static int snd_pcm_oss_format_from(int format)
637 {
638 switch (format) {
639 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
640 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
641 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
642 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
643 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
644 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
645 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
646 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
647 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
648 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
649 default: return SNDRV_PCM_FORMAT_U8;
650 }
651 }
652
653 static int snd_pcm_oss_format_to(int format)
654 {
655 switch (format) {
656 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
657 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
658 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
659 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
660 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
661 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
662 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
663 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
664 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
665 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
666 default: return -EINVAL;
667 }
668 }
669
670 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
671 struct snd_pcm_hw_params *oss_params,
672 struct snd_pcm_hw_params *slave_params)
673 {
674 size_t s;
675 size_t oss_buffer_size, oss_period_size, oss_periods;
676 size_t min_period_size, max_period_size;
677 struct snd_pcm_runtime *runtime = substream->runtime;
678 size_t oss_frame_size;
679
680 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
681 params_channels(oss_params) / 8;
682
683 oss_buffer_size = snd_pcm_plug_client_size(substream,
684 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
685 oss_buffer_size = 1 << ld2(oss_buffer_size);
686 if (atomic_read(&substream->mmap_count)) {
687 if (oss_buffer_size > runtime->oss.mmap_bytes)
688 oss_buffer_size = runtime->oss.mmap_bytes;
689 }
690
691 if (substream->oss.setup.period_size > 16)
692 oss_period_size = substream->oss.setup.period_size;
693 else if (runtime->oss.fragshift) {
694 oss_period_size = 1 << runtime->oss.fragshift;
695 if (oss_period_size > oss_buffer_size / 2)
696 oss_period_size = oss_buffer_size / 2;
697 } else {
698 int sd;
699 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
700
701 oss_period_size = oss_buffer_size;
702 do {
703 oss_period_size /= 2;
704 } while (oss_period_size > bytes_per_sec);
705 if (runtime->oss.subdivision == 0) {
706 sd = 4;
707 if (oss_period_size / sd > 4096)
708 sd *= 2;
709 if (oss_period_size / sd < 4096)
710 sd = 1;
711 } else
712 sd = runtime->oss.subdivision;
713 oss_period_size /= sd;
714 if (oss_period_size < 16)
715 oss_period_size = 16;
716 }
717
718 min_period_size = snd_pcm_plug_client_size(substream,
719 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
720 min_period_size *= oss_frame_size;
721 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
722 if (oss_period_size < min_period_size)
723 oss_period_size = min_period_size;
724
725 max_period_size = snd_pcm_plug_client_size(substream,
726 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
727 max_period_size *= oss_frame_size;
728 max_period_size = 1 << ld2(max_period_size);
729 if (oss_period_size > max_period_size)
730 oss_period_size = max_period_size;
731
732 oss_periods = oss_buffer_size / oss_period_size;
733
734 if (substream->oss.setup.periods > 1)
735 oss_periods = substream->oss.setup.periods;
736
737 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
738 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
739 s = runtime->oss.maxfrags;
740 if (oss_periods > s)
741 oss_periods = s;
742
743 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
744 if (s < 2)
745 s = 2;
746 if (oss_periods < s)
747 oss_periods = s;
748
749 while (oss_period_size * oss_periods > oss_buffer_size)
750 oss_period_size /= 2;
751
752 snd_assert(oss_period_size >= 16, return -EINVAL);
753 runtime->oss.period_bytes = oss_period_size;
754 runtime->oss.period_frames = 1;
755 runtime->oss.periods = oss_periods;
756 return 0;
757 }
758
759 static int choose_rate(struct snd_pcm_substream *substream,
760 struct snd_pcm_hw_params *params, unsigned int best_rate)
761 {
762 struct snd_interval *it;
763 struct snd_pcm_hw_params *save;
764 unsigned int rate, prev;
765
766 save = kmalloc(sizeof(*save), GFP_KERNEL);
767 if (save == NULL)
768 return -ENOMEM;
769 *save = *params;
770 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
771
772 /* try multiples of the best rate */
773 rate = best_rate;
774 for (;;) {
775 if (it->max < rate || (it->max == rate && it->openmax))
776 break;
777 if (it->min < rate || (it->min == rate && !it->openmin)) {
778 int ret;
779 ret = snd_pcm_hw_param_set(substream, params,
780 SNDRV_PCM_HW_PARAM_RATE,
781 rate, 0);
782 if (ret == (int)rate) {
783 kfree(save);
784 return rate;
785 }
786 *params = *save;
787 }
788 prev = rate;
789 rate += best_rate;
790 if (rate <= prev)
791 break;
792 }
793
794 /* not found, use the nearest rate */
795 kfree(save);
796 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
797 }
798
799 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
800 {
801 struct snd_pcm_runtime *runtime = substream->runtime;
802 struct snd_pcm_hw_params *params, *sparams;
803 struct snd_pcm_sw_params *sw_params;
804 ssize_t oss_buffer_size, oss_period_size;
805 size_t oss_frame_size;
806 int err;
807 int direct;
808 int format, sformat, n;
809 struct snd_mask sformat_mask;
810 struct snd_mask mask;
811
812 if (mutex_lock_interruptible(&runtime->oss.params_lock))
813 return -EINTR;
814 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
815 params = kmalloc(sizeof(*params), GFP_KERNEL);
816 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
817 if (!sw_params || !params || !sparams) {
818 snd_printd("No memory\n");
819 err = -ENOMEM;
820 goto failure;
821 }
822
823 if (atomic_read(&substream->mmap_count))
824 direct = 1;
825 else
826 direct = substream->oss.setup.direct;
827
828 _snd_pcm_hw_params_any(sparams);
829 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
830 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
831 snd_mask_none(&mask);
832 if (atomic_read(&substream->mmap_count))
833 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
834 else {
835 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
836 if (!direct)
837 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
838 }
839 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
840 if (err < 0) {
841 snd_printd("No usable accesses\n");
842 err = -EINVAL;
843 goto failure;
844 }
845 choose_rate(substream, sparams, runtime->oss.rate);
846 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
847
848 format = snd_pcm_oss_format_from(runtime->oss.format);
849
850 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
851 if (direct)
852 sformat = format;
853 else
854 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
855
856 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
857 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
858 if (snd_mask_test(&sformat_mask, sformat) &&
859 snd_pcm_oss_format_to(sformat) >= 0)
860 break;
861 }
862 if (sformat > SNDRV_PCM_FORMAT_LAST) {
863 snd_printd("Cannot find a format!!!\n");
864 err = -EINVAL;
865 goto failure;
866 }
867 }
868 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
869 snd_assert(err >= 0, goto failure);
870
871 if (direct) {
872 memcpy(params, sparams, sizeof(*params));
873 } else {
874 _snd_pcm_hw_params_any(params);
875 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
876 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
877 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
878 snd_pcm_oss_format_from(runtime->oss.format), 0);
879 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
880 runtime->oss.channels, 0);
881 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
882 runtime->oss.rate, 0);
883 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
884 params_access(params), params_format(params),
885 params_channels(params), params_rate(params));
886 }
887 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
888 params_access(sparams), params_format(sparams),
889 params_channels(sparams), params_rate(sparams));
890
891 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
892 params_channels(params) / 8;
893
894 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
895 snd_pcm_oss_plugin_clear(substream);
896 if (!direct) {
897 /* add necessary plugins */
898 snd_pcm_oss_plugin_clear(substream);
899 if ((err = snd_pcm_plug_format_plugins(substream,
900 params,
901 sparams)) < 0) {
902 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
903 snd_pcm_oss_plugin_clear(substream);
904 goto failure;
905 }
906 if (runtime->oss.plugin_first) {
907 struct snd_pcm_plugin *plugin;
908 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
909 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
910 snd_pcm_oss_plugin_clear(substream);
911 goto failure;
912 }
913 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
914 err = snd_pcm_plugin_append(plugin);
915 } else {
916 err = snd_pcm_plugin_insert(plugin);
917 }
918 if (err < 0) {
919 snd_pcm_oss_plugin_clear(substream);
920 goto failure;
921 }
922 }
923 }
924 #endif
925
926 err = snd_pcm_oss_period_size(substream, params, sparams);
927 if (err < 0)
928 goto failure;
929
930 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
931 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
932 snd_assert(err >= 0, goto failure);
933
934 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
935 runtime->oss.periods, NULL);
936 snd_assert(err >= 0, goto failure);
937
938 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
939
940 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
941 snd_printd("HW_PARAMS failed: %i\n", err);
942 goto failure;
943 }
944
945 memset(sw_params, 0, sizeof(*sw_params));
946 if (runtime->oss.trigger) {
947 sw_params->start_threshold = 1;
948 } else {
949 sw_params->start_threshold = runtime->boundary;
950 }
951 if (atomic_read(&substream->mmap_count) ||
952 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
953 sw_params->stop_threshold = runtime->boundary;
954 else
955 sw_params->stop_threshold = runtime->buffer_size;
956 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
957 sw_params->period_step = 1;
958 sw_params->sleep_min = 0;
959 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
960 1 : runtime->period_size;
961 sw_params->xfer_align = 1;
962 if (atomic_read(&substream->mmap_count) ||
963 substream->oss.setup.nosilence) {
964 sw_params->silence_threshold = 0;
965 sw_params->silence_size = 0;
966 } else {
967 snd_pcm_uframes_t frames;
968 frames = runtime->period_size + 16;
969 if (frames > runtime->buffer_size)
970 frames = runtime->buffer_size;
971 sw_params->silence_threshold = frames;
972 sw_params->silence_size = frames;
973 }
974
975 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
976 snd_printd("SW_PARAMS failed: %i\n", err);
977 goto failure;
978 }
979
980 runtime->oss.periods = params_periods(sparams);
981 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
982 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
983 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
984 if (runtime->oss.plugin_first) {
985 err = snd_pcm_plug_alloc(substream, oss_period_size);
986 if (err < 0)
987 goto failure;
988 }
989 #endif
990 oss_period_size *= oss_frame_size;
991
992 oss_buffer_size = oss_period_size * runtime->oss.periods;
993 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
994
995 runtime->oss.period_bytes = oss_period_size;
996 runtime->oss.buffer_bytes = oss_buffer_size;
997
998 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
999 runtime->oss.period_bytes,
1000 runtime->oss.buffer_bytes);
1001 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1002 params_period_size(sparams),
1003 params_buffer_size(sparams));
1004
1005 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1006 runtime->oss.channels = params_channels(params);
1007 runtime->oss.rate = params_rate(params);
1008
1009 runtime->oss.params = 0;
1010 runtime->oss.prepare = 1;
1011 vfree(runtime->oss.buffer);
1012 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1013 runtime->oss.buffer_used = 0;
1014 if (runtime->dma_area)
1015 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1016
1017 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1018
1019 err = 0;
1020 failure:
1021 kfree(sw_params);
1022 kfree(params);
1023 kfree(sparams);
1024 mutex_unlock(&runtime->oss.params_lock);
1025 return err;
1026 }
1027
1028 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1029 {
1030 int idx, err;
1031 struct snd_pcm_substream *asubstream = NULL, *substream;
1032
1033 for (idx = 0; idx < 2; idx++) {
1034 substream = pcm_oss_file->streams[idx];
1035 if (substream == NULL)
1036 continue;
1037 if (asubstream == NULL)
1038 asubstream = substream;
1039 if (substream->runtime->oss.params) {
1040 err = snd_pcm_oss_change_params(substream);
1041 if (err < 0)
1042 return err;
1043 }
1044 }
1045 snd_assert(asubstream != NULL, return -EIO);
1046 if (r_substream)
1047 *r_substream = asubstream;
1048 return 0;
1049 }
1050
1051 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1052 {
1053 int err;
1054 struct snd_pcm_runtime *runtime = substream->runtime;
1055
1056 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1057 if (err < 0) {
1058 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1059 return err;
1060 }
1061 runtime->oss.prepare = 0;
1062 runtime->oss.prev_hw_ptr_interrupt = 0;
1063 runtime->oss.period_ptr = 0;
1064 runtime->oss.buffer_used = 0;
1065
1066 return 0;
1067 }
1068
1069 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1070 {
1071 struct snd_pcm_runtime *runtime;
1072 int err;
1073
1074 if (substream == NULL)
1075 return 0;
1076 runtime = substream->runtime;
1077 if (runtime->oss.params) {
1078 err = snd_pcm_oss_change_params(substream);
1079 if (err < 0)
1080 return err;
1081 }
1082 if (runtime->oss.prepare) {
1083 err = snd_pcm_oss_prepare(substream);
1084 if (err < 0)
1085 return err;
1086 }
1087 return 0;
1088 }
1089
1090 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1091 {
1092 struct snd_pcm_runtime *runtime;
1093 snd_pcm_uframes_t frames;
1094 int err = 0;
1095
1096 while (1) {
1097 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1098 if (err < 0)
1099 break;
1100 runtime = substream->runtime;
1101 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1102 break;
1103 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1104 /* until avail(delay) <= buffer_size */
1105 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1106 frames /= runtime->period_size;
1107 frames *= runtime->period_size;
1108 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1109 if (err < 0)
1110 break;
1111 }
1112 return err;
1113 }
1114
1115 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1116 {
1117 struct snd_pcm_runtime *runtime = substream->runtime;
1118 int ret;
1119 while (1) {
1120 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1121 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1122 #ifdef OSS_DEBUG
1123 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1124 printk("pcm_oss: write: recovering from XRUN\n");
1125 else
1126 printk("pcm_oss: write: recovering from SUSPEND\n");
1127 #endif
1128 ret = snd_pcm_oss_prepare(substream);
1129 if (ret < 0)
1130 break;
1131 }
1132 if (in_kernel) {
1133 mm_segment_t fs;
1134 fs = snd_enter_user();
1135 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1136 snd_leave_user(fs);
1137 } else {
1138 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1139 }
1140 if (ret != -EPIPE && ret != -ESTRPIPE)
1141 break;
1142 /* test, if we can't store new data, because the stream */
1143 /* has not been started */
1144 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1145 return -EAGAIN;
1146 }
1147 return ret;
1148 }
1149
1150 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1151 {
1152 struct snd_pcm_runtime *runtime = substream->runtime;
1153 snd_pcm_sframes_t delay;
1154 int ret;
1155 while (1) {
1156 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1157 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1158 #ifdef OSS_DEBUG
1159 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1160 printk("pcm_oss: read: recovering from XRUN\n");
1161 else
1162 printk("pcm_oss: read: recovering from SUSPEND\n");
1163 #endif
1164 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1165 if (ret < 0)
1166 break;
1167 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1168 ret = snd_pcm_oss_prepare(substream);
1169 if (ret < 0)
1170 break;
1171 }
1172 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1173 if (ret < 0)
1174 break;
1175 if (in_kernel) {
1176 mm_segment_t fs;
1177 fs = snd_enter_user();
1178 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1179 snd_leave_user(fs);
1180 } else {
1181 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1182 }
1183 if (ret == -EPIPE) {
1184 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1185 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1186 if (ret < 0)
1187 break;
1188 }
1189 continue;
1190 }
1191 if (ret != -ESTRPIPE)
1192 break;
1193 }
1194 return ret;
1195 }
1196
1197 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1198 {
1199 struct snd_pcm_runtime *runtime = substream->runtime;
1200 int ret;
1201 while (1) {
1202 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1203 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1204 #ifdef OSS_DEBUG
1205 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1206 printk("pcm_oss: writev: recovering from XRUN\n");
1207 else
1208 printk("pcm_oss: writev: recovering from SUSPEND\n");
1209 #endif
1210 ret = snd_pcm_oss_prepare(substream);
1211 if (ret < 0)
1212 break;
1213 }
1214 if (in_kernel) {
1215 mm_segment_t fs;
1216 fs = snd_enter_user();
1217 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1218 snd_leave_user(fs);
1219 } else {
1220 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1221 }
1222 if (ret != -EPIPE && ret != -ESTRPIPE)
1223 break;
1224
1225 /* test, if we can't store new data, because the stream */
1226 /* has not been started */
1227 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1228 return -EAGAIN;
1229 }
1230 return ret;
1231 }
1232
1233 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1234 {
1235 struct snd_pcm_runtime *runtime = substream->runtime;
1236 int ret;
1237 while (1) {
1238 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1239 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1240 #ifdef OSS_DEBUG
1241 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1242 printk("pcm_oss: readv: recovering from XRUN\n");
1243 else
1244 printk("pcm_oss: readv: recovering from SUSPEND\n");
1245 #endif
1246 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1247 if (ret < 0)
1248 break;
1249 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1250 ret = snd_pcm_oss_prepare(substream);
1251 if (ret < 0)
1252 break;
1253 }
1254 if (in_kernel) {
1255 mm_segment_t fs;
1256 fs = snd_enter_user();
1257 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1258 snd_leave_user(fs);
1259 } else {
1260 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1261 }
1262 if (ret != -EPIPE && ret != -ESTRPIPE)
1263 break;
1264 }
1265 return ret;
1266 }
1267
1268 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1269 {
1270 struct snd_pcm_runtime *runtime = substream->runtime;
1271 snd_pcm_sframes_t frames, frames1;
1272 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1273 if (runtime->oss.plugin_first) {
1274 struct snd_pcm_plugin_channel *channels;
1275 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1276 if (!in_kernel) {
1277 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1278 return -EFAULT;
1279 buf = runtime->oss.buffer;
1280 }
1281 frames = bytes / oss_frame_bytes;
1282 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1283 if (frames1 < 0)
1284 return frames1;
1285 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1286 if (frames1 <= 0)
1287 return frames1;
1288 bytes = frames1 * oss_frame_bytes;
1289 } else
1290 #endif
1291 {
1292 frames = bytes_to_frames(runtime, bytes);
1293 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1294 if (frames1 <= 0)
1295 return frames1;
1296 bytes = frames_to_bytes(runtime, frames1);
1297 }
1298 return bytes;
1299 }
1300
1301 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1302 {
1303 size_t xfer = 0;
1304 ssize_t tmp;
1305 struct snd_pcm_runtime *runtime = substream->runtime;
1306
1307 if (atomic_read(&substream->mmap_count))
1308 return -ENXIO;
1309
1310 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1311 return tmp;
1312 mutex_lock(&runtime->oss.params_lock);
1313 while (bytes > 0) {
1314 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1315 tmp = bytes;
1316 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1317 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1318 if (tmp > 0) {
1319 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1320 tmp = -EFAULT;
1321 goto err;
1322 }
1323 }
1324 runtime->oss.buffer_used += tmp;
1325 buf += tmp;
1326 bytes -= tmp;
1327 xfer += tmp;
1328 if (substream->oss.setup.partialfrag ||
1329 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1330 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1331 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1332 if (tmp <= 0)
1333 goto err;
1334 runtime->oss.bytes += tmp;
1335 runtime->oss.period_ptr += tmp;
1336 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1337 if (runtime->oss.period_ptr == 0 ||
1338 runtime->oss.period_ptr == runtime->oss.buffer_used)
1339 runtime->oss.buffer_used = 0;
1340 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1341 tmp = -EAGAIN;
1342 goto err;
1343 }
1344 }
1345 } else {
1346 tmp = snd_pcm_oss_write2(substream,
1347 (const char __force *)buf,
1348 runtime->oss.period_bytes, 0);
1349 if (tmp <= 0)
1350 goto err;
1351 runtime->oss.bytes += tmp;
1352 buf += tmp;
1353 bytes -= tmp;
1354 xfer += tmp;
1355 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1356 tmp != runtime->oss.period_bytes)
1357 break;
1358 }
1359 }
1360 mutex_unlock(&runtime->oss.params_lock);
1361 return xfer;
1362
1363 err:
1364 mutex_unlock(&runtime->oss.params_lock);
1365 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1366 }
1367
1368 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1369 {
1370 struct snd_pcm_runtime *runtime = substream->runtime;
1371 snd_pcm_sframes_t frames, frames1;
1372 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1373 char __user *final_dst = (char __user *)buf;
1374 if (runtime->oss.plugin_first) {
1375 struct snd_pcm_plugin_channel *channels;
1376 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1377 if (!in_kernel)
1378 buf = runtime->oss.buffer;
1379 frames = bytes / oss_frame_bytes;
1380 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1381 if (frames1 < 0)
1382 return frames1;
1383 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1384 if (frames1 <= 0)
1385 return frames1;
1386 bytes = frames1 * oss_frame_bytes;
1387 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1388 return -EFAULT;
1389 } else
1390 #endif
1391 {
1392 frames = bytes_to_frames(runtime, bytes);
1393 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1394 if (frames1 <= 0)
1395 return frames1;
1396 bytes = frames_to_bytes(runtime, frames1);
1397 }
1398 return bytes;
1399 }
1400
1401 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1402 {
1403 size_t xfer = 0;
1404 ssize_t tmp;
1405 struct snd_pcm_runtime *runtime = substream->runtime;
1406
1407 if (atomic_read(&substream->mmap_count))
1408 return -ENXIO;
1409
1410 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1411 return tmp;
1412 mutex_lock(&runtime->oss.params_lock);
1413 while (bytes > 0) {
1414 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1415 if (runtime->oss.buffer_used == 0) {
1416 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1417 if (tmp <= 0)
1418 goto err;
1419 runtime->oss.bytes += tmp;
1420 runtime->oss.period_ptr = tmp;
1421 runtime->oss.buffer_used = tmp;
1422 }
1423 tmp = bytes;
1424 if ((size_t) tmp > runtime->oss.buffer_used)
1425 tmp = runtime->oss.buffer_used;
1426 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1427 tmp = -EFAULT;
1428 goto err;
1429 }
1430 buf += tmp;
1431 bytes -= tmp;
1432 xfer += tmp;
1433 runtime->oss.buffer_used -= tmp;
1434 } else {
1435 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1436 runtime->oss.period_bytes, 0);
1437 if (tmp <= 0)
1438 goto err;
1439 runtime->oss.bytes += tmp;
1440 buf += tmp;
1441 bytes -= tmp;
1442 xfer += tmp;
1443 }
1444 }
1445 mutex_unlock(&runtime->oss.params_lock);
1446 return xfer;
1447
1448 err:
1449 mutex_unlock(&runtime->oss.params_lock);
1450 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1451 }
1452
1453 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1454 {
1455 struct snd_pcm_substream *substream;
1456
1457 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1458 if (substream != NULL) {
1459 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1460 substream->runtime->oss.prepare = 1;
1461 }
1462 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1463 if (substream != NULL) {
1464 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1465 substream->runtime->oss.prepare = 1;
1466 }
1467 return 0;
1468 }
1469
1470 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1471 {
1472 struct snd_pcm_substream *substream;
1473 int err;
1474
1475 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1476 if (substream != NULL) {
1477 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1478 return err;
1479 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1480 }
1481 /* note: all errors from the start action are ignored */
1482 /* OSS apps do not know, how to handle them */
1483 return 0;
1484 }
1485
1486 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1487 {
1488 struct snd_pcm_runtime *runtime;
1489 ssize_t result = 0;
1490 long res;
1491 wait_queue_t wait;
1492
1493 runtime = substream->runtime;
1494 init_waitqueue_entry(&wait, current);
1495 add_wait_queue(&runtime->sleep, &wait);
1496 #ifdef OSS_DEBUG
1497 printk("sync1: size = %li\n", size);
1498 #endif
1499 while (1) {
1500 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1501 if (result > 0) {
1502 runtime->oss.buffer_used = 0;
1503 result = 0;
1504 break;
1505 }
1506 if (result != 0 && result != -EAGAIN)
1507 break;
1508 result = 0;
1509 set_current_state(TASK_INTERRUPTIBLE);
1510 snd_pcm_stream_lock_irq(substream);
1511 res = runtime->status->state;
1512 snd_pcm_stream_unlock_irq(substream);
1513 if (res != SNDRV_PCM_STATE_RUNNING) {
1514 set_current_state(TASK_RUNNING);
1515 break;
1516 }
1517 res = schedule_timeout(10 * HZ);
1518 if (signal_pending(current)) {
1519 result = -ERESTARTSYS;
1520 break;
1521 }
1522 if (res == 0) {
1523 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1524 result = -EIO;
1525 break;
1526 }
1527 }
1528 remove_wait_queue(&runtime->sleep, &wait);
1529 return result;
1530 }
1531
1532 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1533 {
1534 int err = 0;
1535 unsigned int saved_f_flags;
1536 struct snd_pcm_substream *substream;
1537 struct snd_pcm_runtime *runtime;
1538 snd_pcm_format_t format;
1539 unsigned long width;
1540 size_t size;
1541
1542 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1543 if (substream != NULL) {
1544 runtime = substream->runtime;
1545 if (atomic_read(&substream->mmap_count))
1546 goto __direct;
1547 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1548 return err;
1549 format = snd_pcm_oss_format_from(runtime->oss.format);
1550 width = snd_pcm_format_physical_width(format);
1551 mutex_lock(&runtime->oss.params_lock);
1552 if (runtime->oss.buffer_used > 0) {
1553 #ifdef OSS_DEBUG
1554 printk("sync: buffer_used\n");
1555 #endif
1556 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1557 snd_pcm_format_set_silence(format,
1558 runtime->oss.buffer + runtime->oss.buffer_used,
1559 size);
1560 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1561 if (err < 0) {
1562 mutex_unlock(&runtime->oss.params_lock);
1563 return err;
1564 }
1565 } else if (runtime->oss.period_ptr > 0) {
1566 #ifdef OSS_DEBUG
1567 printk("sync: period_ptr\n");
1568 #endif
1569 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1570 snd_pcm_format_set_silence(format,
1571 runtime->oss.buffer,
1572 size * 8 / width);
1573 err = snd_pcm_oss_sync1(substream, size);
1574 if (err < 0) {
1575 mutex_unlock(&runtime->oss.params_lock);
1576 return err;
1577 }
1578 }
1579 /*
1580 * The ALSA's period might be a bit large than OSS one.
1581 * Fill the remain portion of ALSA period with zeros.
1582 */
1583 size = runtime->control->appl_ptr % runtime->period_size;
1584 if (size > 0) {
1585 size = runtime->period_size - size;
1586 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1587 size = (runtime->frame_bits * size) / 8;
1588 while (size > 0) {
1589 mm_segment_t fs;
1590 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1591 size -= size1;
1592 size1 *= 8;
1593 size1 /= runtime->sample_bits;
1594 snd_pcm_format_set_silence(runtime->format,
1595 runtime->oss.buffer,
1596 size1);
1597 fs = snd_enter_user();
1598 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1599 snd_leave_user(fs);
1600 }
1601 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1602 void __user *buffers[runtime->channels];
1603 memset(buffers, 0, runtime->channels * sizeof(void *));
1604 snd_pcm_lib_writev(substream, buffers, size);
1605 }
1606 }
1607 mutex_unlock(&runtime->oss.params_lock);
1608 /*
1609 * finish sync: drain the buffer
1610 */
1611 __direct:
1612 saved_f_flags = substream->f_flags;
1613 substream->f_flags &= ~O_NONBLOCK;
1614 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1615 substream->f_flags = saved_f_flags;
1616 if (err < 0)
1617 return err;
1618 runtime->oss.prepare = 1;
1619 }
1620
1621 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1622 if (substream != NULL) {
1623 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1624 return err;
1625 runtime = substream->runtime;
1626 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1627 if (err < 0)
1628 return err;
1629 runtime->oss.buffer_used = 0;
1630 runtime->oss.prepare = 1;
1631 }
1632 return 0;
1633 }
1634
1635 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1636 {
1637 int idx;
1638
1639 for (idx = 1; idx >= 0; --idx) {
1640 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1641 struct snd_pcm_runtime *runtime;
1642 if (substream == NULL)
1643 continue;
1644 runtime = substream->runtime;
1645 if (rate < 1000)
1646 rate = 1000;
1647 else if (rate > 192000)
1648 rate = 192000;
1649 if (runtime->oss.rate != rate) {
1650 runtime->oss.params = 1;
1651 runtime->oss.rate = rate;
1652 }
1653 }
1654 return snd_pcm_oss_get_rate(pcm_oss_file);
1655 }
1656
1657 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1658 {
1659 struct snd_pcm_substream *substream;
1660 int err;
1661
1662 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1663 return err;
1664 return substream->runtime->oss.rate;
1665 }
1666
1667 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1668 {
1669 int idx;
1670 if (channels < 1)
1671 channels = 1;
1672 if (channels > 128)
1673 return -EINVAL;
1674 for (idx = 1; idx >= 0; --idx) {
1675 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1676 struct snd_pcm_runtime *runtime;
1677 if (substream == NULL)
1678 continue;
1679 runtime = substream->runtime;
1680 if (runtime->oss.channels != channels) {
1681 runtime->oss.params = 1;
1682 runtime->oss.channels = channels;
1683 }
1684 }
1685 return snd_pcm_oss_get_channels(pcm_oss_file);
1686 }
1687
1688 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1689 {
1690 struct snd_pcm_substream *substream;
1691 int err;
1692
1693 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1694 return err;
1695 return substream->runtime->oss.channels;
1696 }
1697
1698 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1699 {
1700 struct snd_pcm_substream *substream;
1701 int err;
1702
1703 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1704 return err;
1705 return substream->runtime->oss.period_bytes;
1706 }
1707
1708 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1709 {
1710 struct snd_pcm_substream *substream;
1711 int err;
1712 int direct;
1713 struct snd_pcm_hw_params *params;
1714 unsigned int formats = 0;
1715 struct snd_mask format_mask;
1716 int fmt;
1717
1718 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1719 return err;
1720 if (atomic_read(&substream->mmap_count))
1721 direct = 1;
1722 else
1723 direct = substream->oss.setup.direct;
1724 if (!direct)
1725 return AFMT_MU_LAW | AFMT_U8 |
1726 AFMT_S16_LE | AFMT_S16_BE |
1727 AFMT_S8 | AFMT_U16_LE |
1728 AFMT_U16_BE;
1729 params = kmalloc(sizeof(*params), GFP_KERNEL);
1730 if (!params)
1731 return -ENOMEM;
1732 _snd_pcm_hw_params_any(params);
1733 err = snd_pcm_hw_refine(substream, params);
1734 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1735 kfree(params);
1736 snd_assert(err >= 0, return err);
1737 for (fmt = 0; fmt < 32; ++fmt) {
1738 if (snd_mask_test(&format_mask, fmt)) {
1739 int f = snd_pcm_oss_format_to(fmt);
1740 if (f >= 0)
1741 formats |= f;
1742 }
1743 }
1744 return formats;
1745 }
1746
1747 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1748 {
1749 int formats, idx;
1750
1751 if (format != AFMT_QUERY) {
1752 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1753 if (formats < 0)
1754 return formats;
1755 if (!(formats & format))
1756 format = AFMT_U8;
1757 for (idx = 1; idx >= 0; --idx) {
1758 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1759 struct snd_pcm_runtime *runtime;
1760 if (substream == NULL)
1761 continue;
1762 runtime = substream->runtime;
1763 if (runtime->oss.format != format) {
1764 runtime->oss.params = 1;
1765 runtime->oss.format = format;
1766 }
1767 }
1768 }
1769 return snd_pcm_oss_get_format(pcm_oss_file);
1770 }
1771
1772 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1773 {
1774 struct snd_pcm_substream *substream;
1775 int err;
1776
1777 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1778 return err;
1779 return substream->runtime->oss.format;
1780 }
1781
1782 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1783 {
1784 struct snd_pcm_runtime *runtime;
1785
1786 if (substream == NULL)
1787 return 0;
1788 runtime = substream->runtime;
1789 if (subdivide == 0) {
1790 subdivide = runtime->oss.subdivision;
1791 if (subdivide == 0)
1792 subdivide = 1;
1793 return subdivide;
1794 }
1795 if (runtime->oss.subdivision || runtime->oss.fragshift)
1796 return -EINVAL;
1797 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1798 subdivide != 8 && subdivide != 16)
1799 return -EINVAL;
1800 runtime->oss.subdivision = subdivide;
1801 runtime->oss.params = 1;
1802 return subdivide;
1803 }
1804
1805 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1806 {
1807 int err = -EINVAL, idx;
1808
1809 for (idx = 1; idx >= 0; --idx) {
1810 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1811 if (substream == NULL)
1812 continue;
1813 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1814 return err;
1815 }
1816 return err;
1817 }
1818
1819 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1820 {
1821 struct snd_pcm_runtime *runtime;
1822
1823 if (substream == NULL)
1824 return 0;
1825 runtime = substream->runtime;
1826 if (runtime->oss.subdivision || runtime->oss.fragshift)
1827 return -EINVAL;
1828 runtime->oss.fragshift = val & 0xffff;
1829 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1830 if (runtime->oss.fragshift < 4) /* < 16 */
1831 runtime->oss.fragshift = 4;
1832 if (runtime->oss.maxfrags < 2)
1833 runtime->oss.maxfrags = 2;
1834 runtime->oss.params = 1;
1835 return 0;
1836 }
1837
1838 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1839 {
1840 int err = -EINVAL, idx;
1841
1842 for (idx = 1; idx >= 0; --idx) {
1843 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1844 if (substream == NULL)
1845 continue;
1846 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1847 return err;
1848 }
1849 return err;
1850 }
1851
1852 static int snd_pcm_oss_nonblock(struct file * file)
1853 {
1854 file->f_flags |= O_NONBLOCK;
1855 return 0;
1856 }
1857
1858 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1859 {
1860
1861 if (substream == NULL) {
1862 res &= ~DSP_CAP_DUPLEX;
1863 return res;
1864 }
1865 #ifdef DSP_CAP_MULTI
1866 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1867 if (substream->pstr->substream_count > 1)
1868 res |= DSP_CAP_MULTI;
1869 #endif
1870 /* DSP_CAP_REALTIME is set all times: */
1871 /* all ALSA drivers can return actual pointer in ring buffer */
1872 #if defined(DSP_CAP_REALTIME) && 0
1873 {
1874 struct snd_pcm_runtime *runtime = substream->runtime;
1875 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1876 res &= ~DSP_CAP_REALTIME;
1877 }
1878 #endif
1879 return res;
1880 }
1881
1882 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1883 {
1884 int result, idx;
1885
1886 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1887 for (idx = 0; idx < 2; idx++) {
1888 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1889 result = snd_pcm_oss_get_caps1(substream, result);
1890 }
1891 result |= 0x0001; /* revision - same as SB AWE 64 */
1892 return result;
1893 }
1894
1895 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1896 {
1897 struct snd_pcm_runtime *runtime = substream->runtime;
1898 snd_pcm_uframes_t appl_ptr;
1899 appl_ptr = hw_ptr + runtime->buffer_size;
1900 appl_ptr %= runtime->boundary;
1901 runtime->control->appl_ptr = appl_ptr;
1902 }
1903
1904 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1905 {
1906 struct snd_pcm_runtime *runtime;
1907 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1908 int err, cmd;
1909
1910 #ifdef OSS_DEBUG
1911 printk("pcm_oss: trigger = 0x%x\n", trigger);
1912 #endif
1913
1914 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1915 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1916
1917 if (psubstream) {
1918 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1919 return err;
1920 }
1921 if (csubstream) {
1922 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1923 return err;
1924 }
1925 if (psubstream) {
1926 runtime = psubstream->runtime;
1927 if (trigger & PCM_ENABLE_OUTPUT) {
1928 if (runtime->oss.trigger)
1929 goto _skip1;
1930 if (atomic_read(&psubstream->mmap_count))
1931 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1932 runtime->oss.trigger = 1;
1933 runtime->start_threshold = 1;
1934 cmd = SNDRV_PCM_IOCTL_START;
1935 } else {
1936 if (!runtime->oss.trigger)
1937 goto _skip1;
1938 runtime->oss.trigger = 0;
1939 runtime->start_threshold = runtime->boundary;
1940 cmd = SNDRV_PCM_IOCTL_DROP;
1941 runtime->oss.prepare = 1;
1942 }
1943 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1944 if (err < 0)
1945 return err;
1946 }
1947 _skip1:
1948 if (csubstream) {
1949 runtime = csubstream->runtime;
1950 if (trigger & PCM_ENABLE_INPUT) {
1951 if (runtime->oss.trigger)
1952 goto _skip2;
1953 runtime->oss.trigger = 1;
1954 runtime->start_threshold = 1;
1955 cmd = SNDRV_PCM_IOCTL_START;
1956 } else {
1957 if (!runtime->oss.trigger)
1958 goto _skip2;
1959 runtime->oss.trigger = 0;
1960 runtime->start_threshold = runtime->boundary;
1961 cmd = SNDRV_PCM_IOCTL_DROP;
1962 runtime->oss.prepare = 1;
1963 }
1964 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1965 if (err < 0)
1966 return err;
1967 }
1968 _skip2:
1969 return 0;
1970 }
1971
1972 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1973 {
1974 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1975 int result = 0;
1976
1977 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1978 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1979 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1980 result |= PCM_ENABLE_OUTPUT;
1981 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1982 result |= PCM_ENABLE_INPUT;
1983 return result;
1984 }
1985
1986 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1987 {
1988 struct snd_pcm_substream *substream;
1989 struct snd_pcm_runtime *runtime;
1990 snd_pcm_sframes_t delay;
1991 int err;
1992
1993 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1994 if (substream == NULL)
1995 return -EINVAL;
1996 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1997 return err;
1998 runtime = substream->runtime;
1999 if (runtime->oss.params || runtime->oss.prepare)
2000 return 0;
2001 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2002 if (err == -EPIPE)
2003 delay = 0; /* hack for broken OSS applications */
2004 else if (err < 0)
2005 return err;
2006 return snd_pcm_oss_bytes(substream, delay);
2007 }
2008
2009 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2010 {
2011 struct snd_pcm_substream *substream;
2012 struct snd_pcm_runtime *runtime;
2013 snd_pcm_sframes_t delay;
2014 int fixup;
2015 struct count_info info;
2016 int err;
2017
2018 if (_info == NULL)
2019 return -EFAULT;
2020 substream = pcm_oss_file->streams[stream];
2021 if (substream == NULL)
2022 return -EINVAL;
2023 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2024 return err;
2025 runtime = substream->runtime;
2026 if (runtime->oss.params || runtime->oss.prepare) {
2027 memset(&info, 0, sizeof(info));
2028 if (copy_to_user(_info, &info, sizeof(info)))
2029 return -EFAULT;
2030 return 0;
2031 }
2032 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2033 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2034 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2035 err = 0;
2036 delay = 0;
2037 fixup = 0;
2038 } else {
2039 fixup = runtime->oss.buffer_used;
2040 }
2041 } else {
2042 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2043 fixup = -runtime->oss.buffer_used;
2044 }
2045 if (err < 0)
2046 return err;
2047 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2048 if (atomic_read(&substream->mmap_count)) {
2049 snd_pcm_sframes_t n;
2050 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2051 if (n < 0)
2052 n += runtime->boundary;
2053 info.blocks = n / runtime->period_size;
2054 runtime->oss.prev_hw_ptr_interrupt = delay;
2055 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2056 snd_pcm_oss_simulate_fill(substream, delay);
2057 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2058 } else {
2059 delay = snd_pcm_oss_bytes(substream, delay);
2060 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2061 if (substream->oss.setup.buggyptr)
2062 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2063 else
2064 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2065 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2066 } else {
2067 delay += fixup;
2068 info.blocks = delay / runtime->oss.period_bytes;
2069 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2070 }
2071 }
2072 if (copy_to_user(_info, &info, sizeof(info)))
2073 return -EFAULT;
2074 return 0;
2075 }
2076
2077 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2078 {
2079 struct snd_pcm_substream *substream;
2080 struct snd_pcm_runtime *runtime;
2081 snd_pcm_sframes_t avail;
2082 int fixup;
2083 struct audio_buf_info info;
2084 int err;
2085
2086 if (_info == NULL)
2087 return -EFAULT;
2088 substream = pcm_oss_file->streams[stream];
2089 if (substream == NULL)
2090 return -EINVAL;
2091 runtime = substream->runtime;
2092
2093 if (runtime->oss.params &&
2094 (err = snd_pcm_oss_change_params(substream)) < 0)
2095 return err;
2096
2097 info.fragsize = runtime->oss.period_bytes;
2098 info.fragstotal = runtime->periods;
2099 if (runtime->oss.prepare) {
2100 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2101 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2102 info.fragments = runtime->oss.periods;
2103 } else {
2104 info.bytes = 0;
2105 info.fragments = 0;
2106 }
2107 } else {
2108 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2110 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2111 avail = runtime->buffer_size;
2112 err = 0;
2113 fixup = 0;
2114 } else {
2115 avail = runtime->buffer_size - avail;
2116 fixup = -runtime->oss.buffer_used;
2117 }
2118 } else {
2119 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2120 fixup = runtime->oss.buffer_used;
2121 }
2122 if (err < 0)
2123 return err;
2124 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2125 info.fragments = info.bytes / runtime->oss.period_bytes;
2126 }
2127
2128 #ifdef OSS_DEBUG
2129 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2130 #endif
2131 if (copy_to_user(_info, &info, sizeof(info)))
2132 return -EFAULT;
2133 return 0;
2134 }
2135
2136 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2137 {
2138 // it won't be probably implemented
2139 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2140 return -EINVAL;
2141 }
2142
2143 static const char *strip_task_path(const char *path)
2144 {
2145 const char *ptr, *ptrl = NULL;
2146 for (ptr = path; *ptr; ptr++) {
2147 if (*ptr == '/')
2148 ptrl = ptr + 1;
2149 }
2150 return ptrl;
2151 }
2152
2153 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2154 const char *task_name,
2155 struct snd_pcm_oss_setup *rsetup)
2156 {
2157 struct snd_pcm_oss_setup *setup;
2158
2159 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2160 do {
2161 for (setup = pcm->streams[stream].oss.setup_list; setup;
2162 setup = setup->next) {
2163 if (!strcmp(setup->task_name, task_name))
2164 goto out;
2165 }
2166 } while ((task_name = strip_task_path(task_name)) != NULL);
2167 out:
2168 if (setup)
2169 *rsetup = *setup;
2170 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2171 }
2172
2173 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2174 {
2175 struct snd_pcm_runtime *runtime;
2176 runtime = substream->runtime;
2177 vfree(runtime->oss.buffer);
2178 runtime->oss.buffer = NULL;
2179 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2180 snd_pcm_oss_plugin_clear(substream);
2181 #endif
2182 substream->oss.oss = 0;
2183 }
2184
2185 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2186 struct snd_pcm_oss_setup *setup,
2187 int minor)
2188 {
2189 struct snd_pcm_runtime *runtime;
2190
2191 substream->oss.oss = 1;
2192 substream->oss.setup = *setup;
2193 if (setup->nonblock)
2194 substream->f_flags |= O_NONBLOCK;
2195 else if (setup->block)
2196 substream->f_flags &= ~O_NONBLOCK;
2197 runtime = substream->runtime;
2198 runtime->oss.params = 1;
2199 runtime->oss.trigger = 1;
2200 runtime->oss.rate = 8000;
2201 mutex_init(&runtime->oss.params_lock);
2202 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2203 case SNDRV_MINOR_OSS_PCM_8:
2204 runtime->oss.format = AFMT_U8;
2205 break;
2206 case SNDRV_MINOR_OSS_PCM_16:
2207 runtime->oss.format = AFMT_S16_LE;
2208 break;
2209 default:
2210 runtime->oss.format = AFMT_MU_LAW;
2211 }
2212 runtime->oss.channels = 1;
2213 runtime->oss.fragshift = 0;
2214 runtime->oss.maxfrags = 0;
2215 runtime->oss.subdivision = 0;
2216 substream->pcm_release = snd_pcm_oss_release_substream;
2217 }
2218
2219 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2220 {
2221 int cidx;
2222 snd_assert(pcm_oss_file != NULL, return -ENXIO);
2223 for (cidx = 0; cidx < 2; ++cidx) {
2224 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2225 if (substream)
2226 snd_pcm_release_substream(substream);
2227 }
2228 kfree(pcm_oss_file);
2229 return 0;
2230 }
2231
2232 static int snd_pcm_oss_open_file(struct file *file,
2233 struct snd_pcm *pcm,
2234 struct snd_pcm_oss_file **rpcm_oss_file,
2235 int minor,
2236 struct snd_pcm_oss_setup *setup)
2237 {
2238 int idx, err;
2239 struct snd_pcm_oss_file *pcm_oss_file;
2240 struct snd_pcm_substream *substream;
2241 unsigned int f_mode = file->f_mode;
2242
2243 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2244 *rpcm_oss_file = NULL;
2245
2246 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2247 if (pcm_oss_file == NULL)
2248 return -ENOMEM;
2249
2250 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2251 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2252 f_mode = FMODE_WRITE;
2253
2254 file->f_flags &= ~O_APPEND;
2255 for (idx = 0; idx < 2; idx++) {
2256 if (setup[idx].disable)
2257 continue;
2258 if (! pcm->streams[idx].substream_count)
2259 continue; /* no matching substream */
2260 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2261 if (! (f_mode & FMODE_WRITE))
2262 continue;
2263 } else {
2264 if (! (f_mode & FMODE_READ))
2265 continue;
2266 }
2267 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2268 if (err < 0) {
2269 snd_pcm_oss_release_file(pcm_oss_file);
2270 return err;
2271 }
2272
2273 pcm_oss_file->streams[idx] = substream;
2274 substream->file = pcm_oss_file;
2275 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2276 }
2277
2278 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2279 snd_pcm_oss_release_file(pcm_oss_file);
2280 return -EINVAL;
2281 }
2282
2283 file->private_data = pcm_oss_file;
2284 *rpcm_oss_file = pcm_oss_file;
2285 return 0;
2286 }
2287
2288
2289 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2290 {
2291 unsigned int idx;
2292
2293 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2294 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2295 name[idx] = task->comm[idx];
2296 name[idx] = '\0';
2297 return 0;
2298 }
2299
2300 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2301 {
2302 int err;
2303 char task_name[32];
2304 struct snd_pcm *pcm;
2305 struct snd_pcm_oss_file *pcm_oss_file;
2306 struct snd_pcm_oss_setup setup[2];
2307 int nonblock;
2308 wait_queue_t wait;
2309
2310 pcm = snd_lookup_oss_minor_data(iminor(inode),
2311 SNDRV_OSS_DEVICE_TYPE_PCM);
2312 if (pcm == NULL) {
2313 err = -ENODEV;
2314 goto __error1;
2315 }
2316 err = snd_card_file_add(pcm->card, file);
2317 if (err < 0)
2318 goto __error1;
2319 if (!try_module_get(pcm->card->module)) {
2320 err = -EFAULT;
2321 goto __error2;
2322 }
2323 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2324 err = -EFAULT;
2325 goto __error;
2326 }
2327 memset(setup, 0, sizeof(setup));
2328 if (file->f_mode & FMODE_WRITE)
2329 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2330 task_name, &setup[0]);
2331 if (file->f_mode & FMODE_READ)
2332 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2333 task_name, &setup[1]);
2334
2335 nonblock = !!(file->f_flags & O_NONBLOCK);
2336 if (!nonblock)
2337 nonblock = nonblock_open;
2338
2339 init_waitqueue_entry(&wait, current);
2340 add_wait_queue(&pcm->open_wait, &wait);
2341 mutex_lock(&pcm->open_mutex);
2342 while (1) {
2343 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2344 iminor(inode), setup);
2345 if (err >= 0)
2346 break;
2347 if (err == -EAGAIN) {
2348 if (nonblock) {
2349 err = -EBUSY;
2350 break;
2351 }
2352 } else
2353 break;
2354 set_current_state(TASK_INTERRUPTIBLE);
2355 mutex_unlock(&pcm->open_mutex);
2356 schedule();
2357 mutex_lock(&pcm->open_mutex);
2358 if (signal_pending(current)) {
2359 err = -ERESTARTSYS;
2360 break;
2361 }
2362 }
2363 remove_wait_queue(&pcm->open_wait, &wait);
2364 mutex_unlock(&pcm->open_mutex);
2365 if (err < 0)
2366 goto __error;
2367 return err;
2368
2369 __error:
2370 module_put(pcm->card->module);
2371 __error2:
2372 snd_card_file_remove(pcm->card, file);
2373 __error1:
2374 return err;
2375 }
2376
2377 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2378 {
2379 struct snd_pcm *pcm;
2380 struct snd_pcm_substream *substream;
2381 struct snd_pcm_oss_file *pcm_oss_file;
2382
2383 pcm_oss_file = file->private_data;
2384 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2385 if (substream == NULL)
2386 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2387 snd_assert(substream != NULL, return -ENXIO);
2388 pcm = substream->pcm;
2389 if (!pcm->card->shutdown)
2390 snd_pcm_oss_sync(pcm_oss_file);
2391 mutex_lock(&pcm->open_mutex);
2392 snd_pcm_oss_release_file(pcm_oss_file);
2393 mutex_unlock(&pcm->open_mutex);
2394 wake_up(&pcm->open_wait);
2395 module_put(pcm->card->module);
2396 snd_card_file_remove(pcm->card, file);
2397 return 0;
2398 }
2399
2400 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2401 {
2402 struct snd_pcm_oss_file *pcm_oss_file;
2403 int __user *p = (int __user *)arg;
2404 int res;
2405
2406 pcm_oss_file = file->private_data;
2407 if (cmd == OSS_GETVERSION)
2408 return put_user(SNDRV_OSS_VERSION, p);
2409 if (cmd == OSS_ALSAEMULVER)
2410 return put_user(1, p);
2411 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2412 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2413 struct snd_pcm_substream *substream;
2414 int idx;
2415 for (idx = 0; idx < 2; ++idx) {
2416 substream = pcm_oss_file->streams[idx];
2417 if (substream != NULL)
2418 break;
2419 }
2420 snd_assert(substream != NULL, return -ENXIO);
2421 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2422 }
2423 #endif
2424 if (((cmd >> 8) & 0xff) != 'P')
2425 return -EINVAL;
2426 #ifdef OSS_DEBUG
2427 printk("pcm_oss: ioctl = 0x%x\n", cmd);
2428 #endif
2429 switch (cmd) {
2430 case SNDCTL_DSP_RESET:
2431 return snd_pcm_oss_reset(pcm_oss_file);
2432 case SNDCTL_DSP_SYNC:
2433 return snd_pcm_oss_sync(pcm_oss_file);
2434 case SNDCTL_DSP_SPEED:
2435 if (get_user(res, p))
2436 return -EFAULT;
2437 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2438 return res;
2439 return put_user(res, p);
2440 case SOUND_PCM_READ_RATE:
2441 res = snd_pcm_oss_get_rate(pcm_oss_file);
2442 if (res < 0)
2443 return res;
2444 return put_user(res, p);
2445 case SNDCTL_DSP_STEREO:
2446 if (get_user(res, p))
2447 return -EFAULT;
2448 res = res > 0 ? 2 : 1;
2449 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2450 return res;
2451 return put_user(--res, p);
2452 case SNDCTL_DSP_GETBLKSIZE:
2453 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2454 if (res < 0)
2455 return res;
2456 return put_user(res, p);
2457 case SNDCTL_DSP_SETFMT:
2458 if (get_user(res, p))
2459 return -EFAULT;
2460 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2461 if (res < 0)
2462 return res;
2463 return put_user(res, p);
2464 case SOUND_PCM_READ_BITS:
2465 res = snd_pcm_oss_get_format(pcm_oss_file);
2466 if (res < 0)
2467 return res;
2468 return put_user(res, p);
2469 case SNDCTL_DSP_CHANNELS:
2470 if (get_user(res, p))
2471 return -EFAULT;
2472 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2473 if (res < 0)
2474 return res;
2475 return put_user(res, p);
2476 case SOUND_PCM_READ_CHANNELS:
2477 res = snd_pcm_oss_get_channels(pcm_oss_file);
2478 if (res < 0)
2479 return res;
2480 return put_user(res, p);
2481 case SOUND_PCM_WRITE_FILTER:
2482 case SOUND_PCM_READ_FILTER:
2483 return -EIO;
2484 case SNDCTL_DSP_POST:
2485 return snd_pcm_oss_post(pcm_oss_file);
2486 case SNDCTL_DSP_SUBDIVIDE:
2487 if (get_user(res, p))
2488 return -EFAULT;
2489 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2490 if (res < 0)
2491 return res;
2492 return put_user(res, p);
2493 case SNDCTL_DSP_SETFRAGMENT:
2494 if (get_user(res, p))
2495 return -EFAULT;
2496 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2497 case SNDCTL_DSP_GETFMTS:
2498 res = snd_pcm_oss_get_formats(pcm_oss_file);
2499 if (res < 0)
2500 return res;
2501 return put_user(res, p);
2502 case SNDCTL_DSP_GETOSPACE:
2503 case SNDCTL_DSP_GETISPACE:
2504 return snd_pcm_oss_get_space(pcm_oss_file,
2505 cmd == SNDCTL_DSP_GETISPACE ?
2506 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2507 (struct audio_buf_info __user *) arg);
2508 case SNDCTL_DSP_NONBLOCK:
2509 return snd_pcm_oss_nonblock(file);
2510 case SNDCTL_DSP_GETCAPS:
2511 res = snd_pcm_oss_get_caps(pcm_oss_file);
2512 if (res < 0)
2513 return res;
2514 return put_user(res, p);
2515 case SNDCTL_DSP_GETTRIGGER:
2516 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2517 if (res < 0)
2518 return res;
2519 return put_user(res, p);
2520 case SNDCTL_DSP_SETTRIGGER:
2521 if (get_user(res, p))
2522 return -EFAULT;
2523 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2524 case SNDCTL_DSP_GETIPTR:
2525 case SNDCTL_DSP_GETOPTR:
2526 return snd_pcm_oss_get_ptr(pcm_oss_file,
2527 cmd == SNDCTL_DSP_GETIPTR ?
2528 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2529 (struct count_info __user *) arg);
2530 case SNDCTL_DSP_MAPINBUF:
2531 case SNDCTL_DSP_MAPOUTBUF:
2532 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2533 cmd == SNDCTL_DSP_MAPINBUF ?
2534 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2535 (struct buffmem_desc __user *) arg);
2536 case SNDCTL_DSP_SETSYNCRO:
2537 /* stop DMA now.. */
2538 return 0;
2539 case SNDCTL_DSP_SETDUPLEX:
2540 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2541 return 0;
2542 return -EIO;
2543 case SNDCTL_DSP_GETODELAY:
2544 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2545 if (res < 0) {
2546 /* it's for sure, some broken apps don't check for error codes */
2547 put_user(0, p);
2548 return res;
2549 }
2550 return put_user(res, p);
2551 case SNDCTL_DSP_PROFILE:
2552 return 0; /* silently ignore */
2553 default:
2554 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2555 }
2556 return -EINVAL;
2557 }
2558
2559 #ifdef CONFIG_COMPAT
2560 /* all compatible */
2561 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2562 #else
2563 #define snd_pcm_oss_ioctl_compat NULL
2564 #endif
2565
2566 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2567 {
2568 struct snd_pcm_oss_file *pcm_oss_file;
2569 struct snd_pcm_substream *substream;
2570
2571 pcm_oss_file = file->private_data;
2572 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2573 if (substream == NULL)
2574 return -ENXIO;
2575 substream->f_flags = file->f_flags & O_NONBLOCK;
2576 #ifndef OSS_DEBUG
2577 return snd_pcm_oss_read1(substream, buf, count);
2578 #else
2579 {
2580 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2581 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2582 return res;
2583 }
2584 #endif
2585 }
2586
2587 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2588 {
2589 struct snd_pcm_oss_file *pcm_oss_file;
2590 struct snd_pcm_substream *substream;
2591 long result;
2592
2593 pcm_oss_file = file->private_data;
2594 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2595 if (substream == NULL)
2596 return -ENXIO;
2597 substream->f_flags = file->f_flags & O_NONBLOCK;
2598 result = snd_pcm_oss_write1(substream, buf, count);
2599 #ifdef OSS_DEBUG
2600 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2601 #endif
2602 return result;
2603 }
2604
2605 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2606 {
2607 struct snd_pcm_runtime *runtime = substream->runtime;
2608 if (atomic_read(&substream->mmap_count))
2609 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2610 else
2611 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2612 }
2613
2614 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2615 {
2616 struct snd_pcm_runtime *runtime = substream->runtime;
2617 if (atomic_read(&substream->mmap_count))
2618 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2619 else
2620 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2621 }
2622
2623 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2624 {
2625 struct snd_pcm_oss_file *pcm_oss_file;
2626 unsigned int mask;
2627 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2628
2629 pcm_oss_file = file->private_data;
2630
2631 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2632 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2633
2634 mask = 0;
2635 if (psubstream != NULL) {
2636 struct snd_pcm_runtime *runtime = psubstream->runtime;
2637 poll_wait(file, &runtime->sleep, wait);
2638 snd_pcm_stream_lock_irq(psubstream);
2639 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2640 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2641 snd_pcm_oss_playback_ready(psubstream)))
2642 mask |= POLLOUT | POLLWRNORM;
2643 snd_pcm_stream_unlock_irq(psubstream);
2644 }
2645 if (csubstream != NULL) {
2646 struct snd_pcm_runtime *runtime = csubstream->runtime;
2647 snd_pcm_state_t ostate;
2648 poll_wait(file, &runtime->sleep, wait);
2649 snd_pcm_stream_lock_irq(csubstream);
2650 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2651 snd_pcm_oss_capture_ready(csubstream))
2652 mask |= POLLIN | POLLRDNORM;
2653 snd_pcm_stream_unlock_irq(csubstream);
2654 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2655 struct snd_pcm_oss_file ofile;
2656 memset(&ofile, 0, sizeof(ofile));
2657 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2658 runtime->oss.trigger = 0;
2659 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2660 }
2661 }
2662
2663 return mask;
2664 }
2665
2666 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2667 {
2668 struct snd_pcm_oss_file *pcm_oss_file;
2669 struct snd_pcm_substream *substream = NULL;
2670 struct snd_pcm_runtime *runtime;
2671 int err;
2672
2673 #ifdef OSS_DEBUG
2674 printk("pcm_oss: mmap begin\n");
2675 #endif
2676 pcm_oss_file = file->private_data;
2677 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2678 case VM_READ | VM_WRITE:
2679 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2680 if (substream)
2681 break;
2682 /* Fall through */
2683 case VM_READ:
2684 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2685 break;
2686 case VM_WRITE:
2687 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2688 break;
2689 default:
2690 return -EINVAL;
2691 }
2692 /* set VM_READ access as well to fix memset() routines that do
2693 reads before writes (to improve performance) */
2694 area->vm_flags |= VM_READ;
2695 if (substream == NULL)
2696 return -ENXIO;
2697 runtime = substream->runtime;
2698 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2699 return -EIO;
2700 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2701 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2702 else
2703 return -EIO;
2704
2705 if (runtime->oss.params) {
2706 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2707 return err;
2708 }
2709 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2710 if (runtime->oss.plugin_first != NULL)
2711 return -EIO;
2712 #endif
2713
2714 if (area->vm_pgoff != 0)
2715 return -EINVAL;
2716
2717 err = snd_pcm_mmap_data(substream, file, area);
2718 if (err < 0)
2719 return err;
2720 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2721 runtime->silence_threshold = 0;
2722 runtime->silence_size = 0;
2723 #ifdef OSS_DEBUG
2724 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2725 #endif
2726 /* In mmap mode we never stop */
2727 runtime->stop_threshold = runtime->boundary;
2728
2729 return 0;
2730 }
2731
2732 #ifdef CONFIG_SND_VERBOSE_PROCFS
2733 /*
2734 * /proc interface
2735 */
2736
2737 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2738 struct snd_info_buffer *buffer)
2739 {
2740 struct snd_pcm_str *pstr = entry->private_data;
2741 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2742 mutex_lock(&pstr->oss.setup_mutex);
2743 while (setup) {
2744 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2745 setup->task_name,
2746 setup->periods,
2747 setup->period_size,
2748 setup->disable ? " disable" : "",
2749 setup->direct ? " direct" : "",
2750 setup->block ? " block" : "",
2751 setup->nonblock ? " non-block" : "",
2752 setup->partialfrag ? " partial-frag" : "",
2753 setup->nosilence ? " no-silence" : "");
2754 setup = setup->next;
2755 }
2756 mutex_unlock(&pstr->oss.setup_mutex);
2757 }
2758
2759 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2760 {
2761 struct snd_pcm_oss_setup *setup, *setupn;
2762
2763 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2764 setup; setup = setupn) {
2765 setupn = setup->next;
2766 kfree(setup->task_name);
2767 kfree(setup);
2768 }
2769 pstr->oss.setup_list = NULL;
2770 }
2771
2772 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2773 struct snd_info_buffer *buffer)
2774 {
2775 struct snd_pcm_str *pstr = entry->private_data;
2776 char line[128], str[32], task_name[32], *ptr;
2777 int idx1;
2778 struct snd_pcm_oss_setup *setup, *setup1, template;
2779
2780 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2781 mutex_lock(&pstr->oss.setup_mutex);
2782 memset(&template, 0, sizeof(template));
2783 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2784 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2785 snd_pcm_oss_proc_free_setup_list(pstr);
2786 mutex_unlock(&pstr->oss.setup_mutex);
2787 continue;
2788 }
2789 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2790 if (!strcmp(setup->task_name, task_name)) {
2791 template = *setup;
2792 break;
2793 }
2794 }
2795 ptr = snd_info_get_str(str, ptr, sizeof(str));
2796 template.periods = simple_strtoul(str, NULL, 10);
2797 ptr = snd_info_get_str(str, ptr, sizeof(str));
2798 template.period_size = simple_strtoul(str, NULL, 10);
2799 for (idx1 = 31; idx1 >= 0; idx1--)
2800 if (template.period_size & (1 << idx1))
2801 break;
2802 for (idx1--; idx1 >= 0; idx1--)
2803 template.period_size &= ~(1 << idx1);
2804 do {
2805 ptr = snd_info_get_str(str, ptr, sizeof(str));
2806 if (!strcmp(str, "disable")) {
2807 template.disable = 1;
2808 } else if (!strcmp(str, "direct")) {
2809 template.direct = 1;
2810 } else if (!strcmp(str, "block")) {
2811 template.block = 1;
2812 } else if (!strcmp(str, "non-block")) {
2813 template.nonblock = 1;
2814 } else if (!strcmp(str, "partial-frag")) {
2815 template.partialfrag = 1;
2816 } else if (!strcmp(str, "no-silence")) {
2817 template.nosilence = 1;
2818 } else if (!strcmp(str, "buggy-ptr")) {
2819 template.buggyptr = 1;
2820 }
2821 } while (*str);
2822 if (setup == NULL) {
2823 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2824 if (! setup) {
2825 buffer->error = -ENOMEM;
2826 mutex_lock(&pstr->oss.setup_mutex);
2827 return;
2828 }
2829 if (pstr->oss.setup_list == NULL)
2830 pstr->oss.setup_list = setup;
2831 else {
2832 for (setup1 = pstr->oss.setup_list;
2833 setup1->next; setup1 = setup1->next);
2834 setup1->next = setup;
2835 }
2836 template.task_name = kstrdup(task_name, GFP_KERNEL);
2837 if (! template.task_name) {
2838 kfree(setup);
2839 buffer->error = -ENOMEM;
2840 mutex_lock(&pstr->oss.setup_mutex);
2841 return;
2842 }
2843 }
2844 *setup = template;
2845 mutex_unlock(&pstr->oss.setup_mutex);
2846 }
2847 }
2848
2849 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2850 {
2851 int stream;
2852 for (stream = 0; stream < 2; ++stream) {
2853 struct snd_info_entry *entry;
2854 struct snd_pcm_str *pstr = &pcm->streams[stream];
2855 if (pstr->substream_count == 0)
2856 continue;
2857 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2858 entry->content = SNDRV_INFO_CONTENT_TEXT;
2859 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2860 entry->c.text.read = snd_pcm_oss_proc_read;
2861 entry->c.text.write = snd_pcm_oss_proc_write;
2862 entry->private_data = pstr;
2863 if (snd_info_register(entry) < 0) {
2864 snd_info_free_entry(entry);
2865 entry = NULL;
2866 }
2867 }
2868 pstr->oss.proc_entry = entry;
2869 }
2870 }
2871
2872 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2873 {
2874 int stream;
2875 for (stream = 0; stream < 2; ++stream) {
2876 struct snd_pcm_str *pstr = &pcm->streams[stream];
2877 snd_info_free_entry(pstr->oss.proc_entry);
2878 pstr->oss.proc_entry = NULL;
2879 snd_pcm_oss_proc_free_setup_list(pstr);
2880 }
2881 }
2882 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2883 #define snd_pcm_oss_proc_init(pcm)
2884 #define snd_pcm_oss_proc_done(pcm)
2885 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2886
2887 /*
2888 * ENTRY functions
2889 */
2890
2891 static const struct file_operations snd_pcm_oss_f_reg =
2892 {
2893 .owner = THIS_MODULE,
2894 .read = snd_pcm_oss_read,
2895 .write = snd_pcm_oss_write,
2896 .open = snd_pcm_oss_open,
2897 .release = snd_pcm_oss_release,
2898 .poll = snd_pcm_oss_poll,
2899 .unlocked_ioctl = snd_pcm_oss_ioctl,
2900 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2901 .mmap = snd_pcm_oss_mmap,
2902 };
2903
2904 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2905 {
2906 char name[128];
2907 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2908 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2909 pcm->card, index, &snd_pcm_oss_f_reg,
2910 pcm, name) < 0) {
2911 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2912 pcm->card->number, pcm->device);
2913 }
2914 }
2915
2916 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2917 {
2918 pcm->oss.reg = 0;
2919 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2920 char name[128];
2921 int duplex;
2922 register_oss_dsp(pcm, 0);
2923 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2924 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2925 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2926 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2927 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2928 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2929 pcm->card->number,
2930 name);
2931 #endif
2932 pcm->oss.reg++;
2933 pcm->oss.reg_mask |= 1;
2934 }
2935 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2936 register_oss_dsp(pcm, 1);
2937 pcm->oss.reg++;
2938 pcm->oss.reg_mask |= 2;
2939 }
2940
2941 if (pcm->oss.reg)
2942 snd_pcm_oss_proc_init(pcm);
2943
2944 return 0;
2945 }
2946
2947 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2948 {
2949 if (pcm->oss.reg) {
2950 if (pcm->oss.reg_mask & 1) {
2951 pcm->oss.reg_mask &= ~1;
2952 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2953 pcm->card, 0);
2954 }
2955 if (pcm->oss.reg_mask & 2) {
2956 pcm->oss.reg_mask &= ~2;
2957 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2958 pcm->card, 1);
2959 }
2960 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2961 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2962 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2963 #endif
2964 }
2965 pcm->oss.reg = 0;
2966 }
2967 return 0;
2968 }
2969
2970 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2971 {
2972 snd_pcm_oss_disconnect_minor(pcm);
2973 snd_pcm_oss_proc_done(pcm);
2974 return 0;
2975 }
2976
2977 static struct snd_pcm_notify snd_pcm_oss_notify =
2978 {
2979 .n_register = snd_pcm_oss_register_minor,
2980 .n_disconnect = snd_pcm_oss_disconnect_minor,
2981 .n_unregister = snd_pcm_oss_unregister_minor,
2982 };
2983
2984 static int __init alsa_pcm_oss_init(void)
2985 {
2986 int i;
2987 int err;
2988
2989 /* check device map table */
2990 for (i = 0; i < SNDRV_CARDS; i++) {
2991 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2992 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2993 i, dsp_map[i]);
2994 dsp_map[i] = 0;
2995 }
2996 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2997 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2998 i, adsp_map[i]);
2999 adsp_map[i] = 1;
3000 }
3001 }
3002 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3003 return err;
3004 return 0;
3005 }
3006
3007 static void __exit alsa_pcm_oss_exit(void)
3008 {
3009 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3010 }
3011
3012 module_init(alsa_pcm_oss_init)
3013 module_exit(alsa_pcm_oss_exit)
Tomato firmware and modifications.