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Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / sound / core / oss / pcm_oss.c
blobb044c0a5a674b116e9441c13558deb0c0a4e70f9
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/sched/signal.h>
32 #include <linux/time.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/math64.h>
36 #include <linux/string.h>
37 #include <linux/compat.h>
38 #include <sound/core.h>
39 #include <sound/minors.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include "pcm_plugin.h"
43 #include <sound/info.h>
44 #include <linux/soundcard.h>
45 #include <sound/initval.h>
46 #include <sound/mixer_oss.h>
47
48 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
49
50 static int dsp_map[SNDRV_CARDS];
51 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
52 static bool nonblock_open = 1;
53
54 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
55 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
56 MODULE_LICENSE("GPL");
57 module_param_array(dsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
59 module_param_array(adsp_map, int, NULL, 0444);
60 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
61 module_param(nonblock_open, bool, 0644);
62 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
64 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
65
66 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
67 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
68 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
69
70 /*
71 * helper functions to process hw_params
72 */
73 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
74 {
75 int changed = 0;
76 if (i->min < min) {
77 i->min = min;
78 i->openmin = openmin;
79 changed = 1;
80 } else if (i->min == min && !i->openmin && openmin) {
81 i->openmin = 1;
82 changed = 1;
83 }
84 if (i->integer) {
85 if (i->openmin) {
86 i->min++;
87 i->openmin = 0;
88 }
89 }
90 if (snd_interval_checkempty(i)) {
91 snd_interval_none(i);
92 return -EINVAL;
93 }
94 return changed;
95 }
96
97 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
98 {
99 int changed = 0;
100 if (i->max > max) {
101 i->max = max;
102 i->openmax = openmax;
103 changed = 1;
104 } else if (i->max == max && !i->openmax && openmax) {
105 i->openmax = 1;
106 changed = 1;
107 }
108 if (i->integer) {
109 if (i->openmax) {
110 i->max--;
111 i->openmax = 0;
112 }
113 }
114 if (snd_interval_checkempty(i)) {
115 snd_interval_none(i);
116 return -EINVAL;
117 }
118 return changed;
119 }
120
121 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
122 {
123 struct snd_interval t;
124 t.empty = 0;
125 t.min = t.max = val;
126 t.openmin = t.openmax = 0;
127 t.integer = 1;
128 return snd_interval_refine(i, &t);
129 }
130
131 /**
132 * snd_pcm_hw_param_value_min
133 * @params: the hw_params instance
134 * @var: parameter to retrieve
135 * @dir: pointer to the direction (-1,0,1) or NULL
136 *
137 * Return the minimum value for field PAR.
138 */
139 static unsigned int
140 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
141 snd_pcm_hw_param_t var, int *dir)
142 {
143 if (hw_is_mask(var)) {
144 if (dir)
145 *dir = 0;
146 return snd_mask_min(hw_param_mask_c(params, var));
147 }
148 if (hw_is_interval(var)) {
149 const struct snd_interval *i = hw_param_interval_c(params, var);
150 if (dir)
151 *dir = i->openmin;
152 return snd_interval_min(i);
153 }
154 return -EINVAL;
155 }
156
157 /**
158 * snd_pcm_hw_param_value_max
159 * @params: the hw_params instance
160 * @var: parameter to retrieve
161 * @dir: pointer to the direction (-1,0,1) or NULL
162 *
163 * Return the maximum value for field PAR.
164 */
165 static unsigned int
166 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
167 snd_pcm_hw_param_t var, int *dir)
168 {
169 if (hw_is_mask(var)) {
170 if (dir)
171 *dir = 0;
172 return snd_mask_max(hw_param_mask_c(params, var));
173 }
174 if (hw_is_interval(var)) {
175 const struct snd_interval *i = hw_param_interval_c(params, var);
176 if (dir)
177 *dir = - (int) i->openmax;
178 return snd_interval_max(i);
179 }
180 return -EINVAL;
181 }
182
183 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
184 snd_pcm_hw_param_t var,
185 const struct snd_mask *val)
186 {
187 int changed;
188 changed = snd_mask_refine(hw_param_mask(params, var), val);
189 if (changed > 0) {
190 params->cmask |= 1 << var;
191 params->rmask |= 1 << var;
192 }
193 return changed;
194 }
195
196 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
197 struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var,
199 const struct snd_mask *val)
200 {
201 int changed = _snd_pcm_hw_param_mask(params, var, val);
202 if (changed < 0)
203 return changed;
204 if (params->rmask) {
205 int err = snd_pcm_hw_refine(pcm, params);
206 if (err < 0)
207 return err;
208 }
209 return 0;
210 }
211
212 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
213 snd_pcm_hw_param_t var, unsigned int val,
214 int dir)
215 {
216 int changed;
217 int open = 0;
218 if (dir) {
219 if (dir > 0) {
220 open = 1;
221 } else if (dir < 0) {
222 if (val > 0) {
223 open = 1;
224 val--;
225 }
226 }
227 }
228 if (hw_is_mask(var))
229 changed = snd_mask_refine_min(hw_param_mask(params, var),
230 val + !!open);
231 else if (hw_is_interval(var))
232 changed = snd_interval_refine_min(hw_param_interval(params, var),
233 val, open);
234 else
235 return -EINVAL;
236 if (changed > 0) {
237 params->cmask |= 1 << var;
238 params->rmask |= 1 << var;
239 }
240 return changed;
241 }
242
243 /**
244 * snd_pcm_hw_param_min
245 * @pcm: PCM instance
246 * @params: the hw_params instance
247 * @var: parameter to retrieve
248 * @val: minimal value
249 * @dir: pointer to the direction (-1,0,1) or NULL
250 *
251 * Inside configuration space defined by PARAMS remove from PAR all
252 * values < VAL. Reduce configuration space accordingly.
253 * Return new minimum or -EINVAL if the configuration space is empty
254 */
255 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
256 struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int *dir)
259 {
260 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
261 if (changed < 0)
262 return changed;
263 if (params->rmask) {
264 int err = snd_pcm_hw_refine(pcm, params);
265 if (err < 0)
266 return err;
267 }
268 return snd_pcm_hw_param_value_min(params, var, dir);
269 }
270
271 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
272 snd_pcm_hw_param_t var, unsigned int val,
273 int dir)
274 {
275 int changed;
276 int open = 0;
277 if (dir) {
278 if (dir < 0) {
279 open = 1;
280 } else if (dir > 0) {
281 open = 1;
282 val++;
283 }
284 }
285 if (hw_is_mask(var)) {
286 if (val == 0 && open) {
287 snd_mask_none(hw_param_mask(params, var));
288 changed = -EINVAL;
289 } else
290 changed = snd_mask_refine_max(hw_param_mask(params, var),
291 val - !!open);
292 } else if (hw_is_interval(var))
293 changed = snd_interval_refine_max(hw_param_interval(params, var),
294 val, open);
295 else
296 return -EINVAL;
297 if (changed > 0) {
298 params->cmask |= 1 << var;
299 params->rmask |= 1 << var;
300 }
301 return changed;
302 }
303
304 /**
305 * snd_pcm_hw_param_max
306 * @pcm: PCM instance
307 * @params: the hw_params instance
308 * @var: parameter to retrieve
309 * @val: maximal value
310 * @dir: pointer to the direction (-1,0,1) or NULL
311 *
312 * Inside configuration space defined by PARAMS remove from PAR all
313 * values >= VAL + 1. Reduce configuration space accordingly.
314 * Return new maximum or -EINVAL if the configuration space is empty
315 */
316 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
317 struct snd_pcm_hw_params *params,
318 snd_pcm_hw_param_t var, unsigned int val,
319 int *dir)
320 {
321 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
322 if (changed < 0)
323 return changed;
324 if (params->rmask) {
325 int err = snd_pcm_hw_refine(pcm, params);
326 if (err < 0)
327 return err;
328 }
329 return snd_pcm_hw_param_value_max(params, var, dir);
330 }
331
332 static int boundary_sub(int a, int adir,
333 int b, int bdir,
334 int *c, int *cdir)
335 {
336 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
337 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
338 *c = a - b;
339 *cdir = adir - bdir;
340 if (*cdir == -2) {
341 (*c)--;
342 } else if (*cdir == 2) {
343 (*c)++;
344 }
345 return 0;
346 }
347
348 static int boundary_lt(unsigned int a, int adir,
349 unsigned int b, int bdir)
350 {
351 if (adir < 0) {
352 a--;
353 adir = 1;
354 } else if (adir > 0)
355 adir = 1;
356 if (bdir < 0) {
357 b--;
358 bdir = 1;
359 } else if (bdir > 0)
360 bdir = 1;
361 return a < b || (a == b && adir < bdir);
362 }
363
364 /* Return 1 if min is nearer to best than max */
365 static int boundary_nearer(int min, int mindir,
366 int best, int bestdir,
367 int max, int maxdir)
368 {
369 int dmin, dmindir;
370 int dmax, dmaxdir;
371 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
372 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
373 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
374 }
375
376 /**
377 * snd_pcm_hw_param_near
378 * @pcm: PCM instance
379 * @params: the hw_params instance
380 * @var: parameter to retrieve
381 * @best: value to set
382 * @dir: pointer to the direction (-1,0,1) or NULL
383 *
384 * Inside configuration space defined by PARAMS set PAR to the available value
385 * nearest to VAL. Reduce configuration space accordingly.
386 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
387 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
388 * Return the value found.
389 */
390 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
391 struct snd_pcm_hw_params *params,
392 snd_pcm_hw_param_t var, unsigned int best,
393 int *dir)
394 {
395 struct snd_pcm_hw_params *save = NULL;
396 int v;
397 unsigned int saved_min;
398 int last = 0;
399 int min, max;
400 int mindir, maxdir;
401 int valdir = dir ? *dir : 0;
402 /* FIXME */
403 if (best > INT_MAX)
404 best = INT_MAX;
405 min = max = best;
406 mindir = maxdir = valdir;
407 if (maxdir > 0)
408 maxdir = 0;
409 else if (maxdir == 0)
410 maxdir = -1;
411 else {
412 maxdir = 1;
413 max--;
414 }
415 save = kmalloc(sizeof(*save), GFP_KERNEL);
416 if (save == NULL)
417 return -ENOMEM;
418 *save = *params;
419 saved_min = min;
420 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
421 if (min >= 0) {
422 struct snd_pcm_hw_params *params1;
423 if (max < 0)
424 goto _end;
425 if ((unsigned int)min == saved_min && mindir == valdir)
426 goto _end;
427 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
428 if (params1 == NULL) {
429 kfree(save);
430 return -ENOMEM;
431 }
432 *params1 = *save;
433 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
434 if (max < 0) {
435 kfree(params1);
436 goto _end;
437 }
438 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
439 *params = *params1;
440 last = 1;
441 }
442 kfree(params1);
443 } else {
444 *params = *save;
445 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
446 if (max < 0) {
447 kfree(save);
448 return max;
449 }
450 last = 1;
451 }
452 _end:
453 kfree(save);
454 if (last)
455 v = snd_pcm_hw_param_last(pcm, params, var, dir);
456 else
457 v = snd_pcm_hw_param_first(pcm, params, var, dir);
458 return v;
459 }
460
461 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
462 snd_pcm_hw_param_t var, unsigned int val,
463 int dir)
464 {
465 int changed;
466 if (hw_is_mask(var)) {
467 struct snd_mask *m = hw_param_mask(params, var);
468 if (val == 0 && dir < 0) {
469 changed = -EINVAL;
470 snd_mask_none(m);
471 } else {
472 if (dir > 0)
473 val++;
474 else if (dir < 0)
475 val--;
476 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
477 }
478 } else if (hw_is_interval(var)) {
479 struct snd_interval *i = hw_param_interval(params, var);
480 if (val == 0 && dir < 0) {
481 changed = -EINVAL;
482 snd_interval_none(i);
483 } else if (dir == 0)
484 changed = snd_interval_refine_set(i, val);
485 else {
486 struct snd_interval t;
487 t.openmin = 1;
488 t.openmax = 1;
489 t.empty = 0;
490 t.integer = 0;
491 if (dir < 0) {
492 t.min = val - 1;
493 t.max = val;
494 } else {
495 t.min = val;
496 t.max = val+1;
497 }
498 changed = snd_interval_refine(i, &t);
499 }
500 } else
501 return -EINVAL;
502 if (changed > 0) {
503 params->cmask |= 1 << var;
504 params->rmask |= 1 << var;
505 }
506 return changed;
507 }
508
509 /**
510 * snd_pcm_hw_param_set
511 * @pcm: PCM instance
512 * @params: the hw_params instance
513 * @var: parameter to retrieve
514 * @val: value to set
515 * @dir: pointer to the direction (-1,0,1) or NULL
516 *
517 * Inside configuration space defined by PARAMS remove from PAR all
518 * values != VAL. Reduce configuration space accordingly.
519 * Return VAL or -EINVAL if the configuration space is empty
520 */
521 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
522 struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var, unsigned int val,
524 int dir)
525 {
526 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
527 if (changed < 0)
528 return changed;
529 if (params->rmask) {
530 int err = snd_pcm_hw_refine(pcm, params);
531 if (err < 0)
532 return err;
533 }
534 return snd_pcm_hw_param_value(params, var, NULL);
535 }
536
537 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
538 snd_pcm_hw_param_t var)
539 {
540 int changed;
541 changed = snd_interval_setinteger(hw_param_interval(params, var));
542 if (changed > 0) {
543 params->cmask |= 1 << var;
544 params->rmask |= 1 << var;
545 }
546 return changed;
547 }
548
549 /*
550 * plugin
551 */
552
553 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
554 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
555 {
556 struct snd_pcm_runtime *runtime = substream->runtime;
557 struct snd_pcm_plugin *plugin, *next;
558
559 plugin = runtime->oss.plugin_first;
560 while (plugin) {
561 next = plugin->next;
562 snd_pcm_plugin_free(plugin);
563 plugin = next;
564 }
565 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
566 return 0;
567 }
568
569 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
570 {
571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
572 plugin->next = runtime->oss.plugin_first;
573 plugin->prev = NULL;
574 if (runtime->oss.plugin_first) {
575 runtime->oss.plugin_first->prev = plugin;
576 runtime->oss.plugin_first = plugin;
577 } else {
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
580 }
581 return 0;
582 }
583
584 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
585 {
586 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
587 plugin->next = NULL;
588 plugin->prev = runtime->oss.plugin_last;
589 if (runtime->oss.plugin_last) {
590 runtime->oss.plugin_last->next = plugin;
591 runtime->oss.plugin_last = plugin;
592 } else {
593 runtime->oss.plugin_last =
594 runtime->oss.plugin_first = plugin;
595 }
596 return 0;
597 }
598 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
599
600 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
601 {
602 struct snd_pcm_runtime *runtime = substream->runtime;
603 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
604 long bytes = frames_to_bytes(runtime, frames);
605 if (buffer_size == runtime->oss.buffer_bytes)
606 return bytes;
607 #if BITS_PER_LONG >= 64
608 return runtime->oss.buffer_bytes * bytes / buffer_size;
609 #else
610 {
611 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
612 return div_u64(bsize, buffer_size);
613 }
614 #endif
615 }
616
617 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
618 {
619 struct snd_pcm_runtime *runtime = substream->runtime;
620 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
621 if (buffer_size == runtime->oss.buffer_bytes)
622 return bytes_to_frames(runtime, bytes);
623 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
624 }
625
626 static inline
627 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
628 {
629 return runtime->hw_ptr_interrupt;
630 }
631
632 /* define extended formats in the recent OSS versions (if any) */
633 /* linear formats */
634 #define AFMT_S32_LE 0x00001000
635 #define AFMT_S32_BE 0x00002000
636 #define AFMT_S24_LE 0x00008000
637 #define AFMT_S24_BE 0x00010000
638 #define AFMT_S24_PACKED 0x00040000
639
640 /* other supported formats */
641 #define AFMT_FLOAT 0x00004000
642 #define AFMT_SPDIF_RAW 0x00020000
643
644 /* unsupported formats */
645 #define AFMT_AC3 0x00000400
646 #define AFMT_VORBIS 0x00000800
647
648 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
649 {
650 switch (format) {
651 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
652 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
653 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
654 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
655 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
656 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
657 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
658 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
659 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
660 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
661 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
662 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
663 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
664 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
665 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
666 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
667 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
668 default: return SNDRV_PCM_FORMAT_U8;
669 }
670 }
671
672 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
673 {
674 switch (format) {
675 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
676 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
677 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
678 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
679 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
680 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
681 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
682 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
683 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
684 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
685 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
686 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
687 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
688 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
689 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
690 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
691 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
692 default: return -EINVAL;
693 }
694 }
695
696 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
697 struct snd_pcm_hw_params *oss_params,
698 struct snd_pcm_hw_params *slave_params)
699 {
700 size_t s;
701 size_t oss_buffer_size, oss_period_size, oss_periods;
702 size_t min_period_size, max_period_size;
703 struct snd_pcm_runtime *runtime = substream->runtime;
704 size_t oss_frame_size;
705
706 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
707 params_channels(oss_params) / 8;
708
709 oss_buffer_size = snd_pcm_plug_client_size(substream,
710 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
711 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
712 if (atomic_read(&substream->mmap_count)) {
713 if (oss_buffer_size > runtime->oss.mmap_bytes)
714 oss_buffer_size = runtime->oss.mmap_bytes;
715 }
716
717 if (substream->oss.setup.period_size > 16)
718 oss_period_size = substream->oss.setup.period_size;
719 else if (runtime->oss.fragshift) {
720 oss_period_size = 1 << runtime->oss.fragshift;
721 if (oss_period_size > oss_buffer_size / 2)
722 oss_period_size = oss_buffer_size / 2;
723 } else {
724 int sd;
725 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
726
727 oss_period_size = oss_buffer_size;
728 do {
729 oss_period_size /= 2;
730 } while (oss_period_size > bytes_per_sec);
731 if (runtime->oss.subdivision == 0) {
732 sd = 4;
733 if (oss_period_size / sd > 4096)
734 sd *= 2;
735 if (oss_period_size / sd < 4096)
736 sd = 1;
737 } else
738 sd = runtime->oss.subdivision;
739 oss_period_size /= sd;
740 if (oss_period_size < 16)
741 oss_period_size = 16;
742 }
743
744 min_period_size = snd_pcm_plug_client_size(substream,
745 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
746 min_period_size *= oss_frame_size;
747 min_period_size = roundup_pow_of_two(min_period_size);
748 if (oss_period_size < min_period_size)
749 oss_period_size = min_period_size;
750
751 max_period_size = snd_pcm_plug_client_size(substream,
752 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
753 max_period_size *= oss_frame_size;
754 max_period_size = rounddown_pow_of_two(max_period_size);
755 if (oss_period_size > max_period_size)
756 oss_period_size = max_period_size;
757
758 oss_periods = oss_buffer_size / oss_period_size;
759
760 if (substream->oss.setup.periods > 1)
761 oss_periods = substream->oss.setup.periods;
762
763 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
764 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
765 s = runtime->oss.maxfrags;
766 if (oss_periods > s)
767 oss_periods = s;
768
769 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
770 if (s < 2)
771 s = 2;
772 if (oss_periods < s)
773 oss_periods = s;
774
775 while (oss_period_size * oss_periods > oss_buffer_size)
776 oss_period_size /= 2;
777
778 if (oss_period_size < 16)
779 return -EINVAL;
780 runtime->oss.period_bytes = oss_period_size;
781 runtime->oss.period_frames = 1;
782 runtime->oss.periods = oss_periods;
783 return 0;
784 }
785
786 static int choose_rate(struct snd_pcm_substream *substream,
787 struct snd_pcm_hw_params *params, unsigned int best_rate)
788 {
789 const struct snd_interval *it;
790 struct snd_pcm_hw_params *save;
791 unsigned int rate, prev;
792
793 save = kmalloc(sizeof(*save), GFP_KERNEL);
794 if (save == NULL)
795 return -ENOMEM;
796 *save = *params;
797 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
798
799 /* try multiples of the best rate */
800 rate = best_rate;
801 for (;;) {
802 if (it->max < rate || (it->max == rate && it->openmax))
803 break;
804 if (it->min < rate || (it->min == rate && !it->openmin)) {
805 int ret;
806 ret = snd_pcm_hw_param_set(substream, params,
807 SNDRV_PCM_HW_PARAM_RATE,
808 rate, 0);
809 if (ret == (int)rate) {
810 kfree(save);
811 return rate;
812 }
813 *params = *save;
814 }
815 prev = rate;
816 rate += best_rate;
817 if (rate <= prev)
818 break;
819 }
820
821 /* not found, use the nearest rate */
822 kfree(save);
823 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
824 }
825
826 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
827 bool trylock)
828 {
829 struct snd_pcm_runtime *runtime = substream->runtime;
830 struct snd_pcm_hw_params *params, *sparams;
831 struct snd_pcm_sw_params *sw_params;
832 ssize_t oss_buffer_size, oss_period_size;
833 size_t oss_frame_size;
834 int err;
835 int direct;
836 snd_pcm_format_t format, sformat;
837 int n;
838 const struct snd_mask *sformat_mask;
839 struct snd_mask mask;
840
841 if (trylock) {
842 if (!(mutex_trylock(&runtime->oss.params_lock)))
843 return -EAGAIN;
844 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
845 return -ERESTARTSYS;
846 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
847 params = kmalloc(sizeof(*params), GFP_KERNEL);
848 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
849 if (!sw_params || !params || !sparams) {
850 err = -ENOMEM;
851 goto failure;
852 }
853
854 if (atomic_read(&substream->mmap_count))
855 direct = 1;
856 else
857 direct = substream->oss.setup.direct;
858
859 _snd_pcm_hw_params_any(sparams);
860 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
861 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
862 snd_mask_none(&mask);
863 if (atomic_read(&substream->mmap_count))
864 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
865 else {
866 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
867 if (!direct)
868 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
869 }
870 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
871 if (err < 0) {
872 pcm_dbg(substream->pcm, "No usable accesses\n");
873 err = -EINVAL;
874 goto failure;
875 }
876 choose_rate(substream, sparams, runtime->oss.rate);
877 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
878
879 format = snd_pcm_oss_format_from(runtime->oss.format);
880
881 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
882 if (direct)
883 sformat = format;
884 else
885 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
886
887 if ((__force int)sformat < 0 ||
888 !snd_mask_test(sformat_mask, (__force int)sformat)) {
889 for (sformat = (__force snd_pcm_format_t)0;
890 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
891 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
892 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
893 snd_pcm_oss_format_to(sformat) >= 0)
894 break;
895 }
896 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
897 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
898 err = -EINVAL;
899 goto failure;
900 }
901 }
902 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
903 if (err < 0)
904 goto failure;
905
906 if (direct) {
907 memcpy(params, sparams, sizeof(*params));
908 } else {
909 _snd_pcm_hw_params_any(params);
910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
911 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
913 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
914 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
915 runtime->oss.channels, 0);
916 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
917 runtime->oss.rate, 0);
918 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
919 params_access(params), params_format(params),
920 params_channels(params), params_rate(params));
921 }
922 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
923 params_access(sparams), params_format(sparams),
924 params_channels(sparams), params_rate(sparams));
925
926 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
927 params_channels(params) / 8;
928
929 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
930 snd_pcm_oss_plugin_clear(substream);
931 if (!direct) {
932 /* add necessary plugins */
933 snd_pcm_oss_plugin_clear(substream);
934 if ((err = snd_pcm_plug_format_plugins(substream,
935 params,
936 sparams)) < 0) {
937 pcm_dbg(substream->pcm,
938 "snd_pcm_plug_format_plugins failed: %i\n", err);
939 snd_pcm_oss_plugin_clear(substream);
940 goto failure;
941 }
942 if (runtime->oss.plugin_first) {
943 struct snd_pcm_plugin *plugin;
944 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
945 pcm_dbg(substream->pcm,
946 "snd_pcm_plugin_build_io failed: %i\n", err);
947 snd_pcm_oss_plugin_clear(substream);
948 goto failure;
949 }
950 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
951 err = snd_pcm_plugin_append(plugin);
952 } else {
953 err = snd_pcm_plugin_insert(plugin);
954 }
955 if (err < 0) {
956 snd_pcm_oss_plugin_clear(substream);
957 goto failure;
958 }
959 }
960 }
961 #endif
962
963 err = snd_pcm_oss_period_size(substream, params, sparams);
964 if (err < 0)
965 goto failure;
966
967 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
968 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
969 if (err < 0)
970 goto failure;
971
972 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
973 runtime->oss.periods, NULL);
974 if (err < 0)
975 goto failure;
976
977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
978
979 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
980 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
981 goto failure;
982 }
983
984 if (runtime->oss.trigger) {
985 sw_params->start_threshold = 1;
986 } else {
987 sw_params->start_threshold = runtime->boundary;
988 }
989 if (atomic_read(&substream->mmap_count) ||
990 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
991 sw_params->stop_threshold = runtime->boundary;
992 else
993 sw_params->stop_threshold = runtime->buffer_size;
994 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
995 sw_params->period_step = 1;
996 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
997 1 : runtime->period_size;
998 if (atomic_read(&substream->mmap_count) ||
999 substream->oss.setup.nosilence) {
1000 sw_params->silence_threshold = 0;
1001 sw_params->silence_size = 0;
1002 } else {
1003 snd_pcm_uframes_t frames;
1004 frames = runtime->period_size + 16;
1005 if (frames > runtime->buffer_size)
1006 frames = runtime->buffer_size;
1007 sw_params->silence_threshold = frames;
1008 sw_params->silence_size = frames;
1009 }
1010
1011 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1012 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1013 goto failure;
1014 }
1015
1016 runtime->oss.periods = params_periods(sparams);
1017 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1018 if (oss_period_size < 0) {
1019 err = -EINVAL;
1020 goto failure;
1021 }
1022 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1023 if (runtime->oss.plugin_first) {
1024 err = snd_pcm_plug_alloc(substream, oss_period_size);
1025 if (err < 0)
1026 goto failure;
1027 }
1028 #endif
1029 oss_period_size *= oss_frame_size;
1030
1031 oss_buffer_size = oss_period_size * runtime->oss.periods;
1032 if (oss_buffer_size < 0) {
1033 err = -EINVAL;
1034 goto failure;
1035 }
1036
1037 runtime->oss.period_bytes = oss_period_size;
1038 runtime->oss.buffer_bytes = oss_buffer_size;
1039
1040 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1041 runtime->oss.period_bytes,
1042 runtime->oss.buffer_bytes);
1043 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1044 params_period_size(sparams),
1045 params_buffer_size(sparams));
1046
1047 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1048 runtime->oss.channels = params_channels(params);
1049 runtime->oss.rate = params_rate(params);
1050
1051 vfree(runtime->oss.buffer);
1052 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1053 if (!runtime->oss.buffer) {
1054 err = -ENOMEM;
1055 goto failure;
1056 }
1057
1058 runtime->oss.params = 0;
1059 runtime->oss.prepare = 1;
1060 runtime->oss.buffer_used = 0;
1061 if (runtime->dma_area)
1062 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1063
1064 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1065
1066 err = 0;
1067 failure:
1068 kfree(sw_params);
1069 kfree(params);
1070 kfree(sparams);
1071 mutex_unlock(&runtime->oss.params_lock);
1072 return err;
1073 }
1074
1075 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1076 {
1077 int idx, err;
1078 struct snd_pcm_substream *asubstream = NULL, *substream;
1079
1080 for (idx = 0; idx < 2; idx++) {
1081 substream = pcm_oss_file->streams[idx];
1082 if (substream == NULL)
1083 continue;
1084 if (asubstream == NULL)
1085 asubstream = substream;
1086 if (substream->runtime->oss.params) {
1087 err = snd_pcm_oss_change_params(substream, false);
1088 if (err < 0)
1089 return err;
1090 }
1091 }
1092 if (!asubstream)
1093 return -EIO;
1094 if (r_substream)
1095 *r_substream = asubstream;
1096 return 0;
1097 }
1098
1099 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1100 {
1101 int err;
1102 struct snd_pcm_runtime *runtime = substream->runtime;
1103
1104 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1105 if (err < 0) {
1106 pcm_dbg(substream->pcm,
1107 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1108 return err;
1109 }
1110 runtime->oss.prepare = 0;
1111 runtime->oss.prev_hw_ptr_period = 0;
1112 runtime->oss.period_ptr = 0;
1113 runtime->oss.buffer_used = 0;
1114
1115 return 0;
1116 }
1117
1118 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1119 {
1120 struct snd_pcm_runtime *runtime;
1121 int err;
1122
1123 if (substream == NULL)
1124 return 0;
1125 runtime = substream->runtime;
1126 if (runtime->oss.params) {
1127 err = snd_pcm_oss_change_params(substream, false);
1128 if (err < 0)
1129 return err;
1130 }
1131 if (runtime->oss.prepare) {
1132 err = snd_pcm_oss_prepare(substream);
1133 if (err < 0)
1134 return err;
1135 }
1136 return 0;
1137 }
1138
1139 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1140 {
1141 struct snd_pcm_runtime *runtime;
1142 snd_pcm_uframes_t frames;
1143 int err = 0;
1144
1145 while (1) {
1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1147 if (err < 0)
1148 break;
1149 runtime = substream->runtime;
1150 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1151 break;
1152 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1153 /* until avail(delay) <= buffer_size */
1154 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1155 frames /= runtime->period_size;
1156 frames *= runtime->period_size;
1157 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1158 if (err < 0)
1159 break;
1160 }
1161 return err;
1162 }
1163
1164 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1165 {
1166 struct snd_pcm_runtime *runtime = substream->runtime;
1167 int ret;
1168 while (1) {
1169 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1170 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1171 #ifdef OSS_DEBUG
1172 pcm_dbg(substream->pcm,
1173 "pcm_oss: write: recovering from %s\n",
1174 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1175 "XRUN" : "SUSPEND");
1176 #endif
1177 ret = snd_pcm_oss_prepare(substream);
1178 if (ret < 0)
1179 break;
1180 }
1181 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1182 frames, in_kernel);
1183 if (ret != -EPIPE && ret != -ESTRPIPE)
1184 break;
1185 /* test, if we can't store new data, because the stream */
1186 /* has not been started */
1187 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1188 return -EAGAIN;
1189 }
1190 return ret;
1191 }
1192
1193 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1194 {
1195 struct snd_pcm_runtime *runtime = substream->runtime;
1196 snd_pcm_sframes_t delay;
1197 int ret;
1198 while (1) {
1199 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1200 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1201 #ifdef OSS_DEBUG
1202 pcm_dbg(substream->pcm,
1203 "pcm_oss: read: recovering from %s\n",
1204 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1205 "XRUN" : "SUSPEND");
1206 #endif
1207 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1208 if (ret < 0)
1209 break;
1210 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1211 ret = snd_pcm_oss_prepare(substream);
1212 if (ret < 0)
1213 break;
1214 }
1215 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1216 if (ret < 0)
1217 break;
1218 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1219 frames, in_kernel);
1220 if (ret == -EPIPE) {
1221 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1222 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1223 if (ret < 0)
1224 break;
1225 }
1226 continue;
1227 }
1228 if (ret != -ESTRPIPE)
1229 break;
1230 }
1231 return ret;
1232 }
1233
1234 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1235 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1236 {
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1238 int ret;
1239 while (1) {
1240 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1241 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1242 #ifdef OSS_DEBUG
1243 pcm_dbg(substream->pcm,
1244 "pcm_oss: writev: recovering from %s\n",
1245 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1246 "XRUN" : "SUSPEND");
1247 #endif
1248 ret = snd_pcm_oss_prepare(substream);
1249 if (ret < 0)
1250 break;
1251 }
1252 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1253 if (ret != -EPIPE && ret != -ESTRPIPE)
1254 break;
1255
1256 /* test, if we can't store new data, because the stream */
1257 /* has not been started */
1258 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1259 return -EAGAIN;
1260 }
1261 return ret;
1262 }
1263
1264 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1265 {
1266 struct snd_pcm_runtime *runtime = substream->runtime;
1267 int ret;
1268 while (1) {
1269 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1270 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1271 #ifdef OSS_DEBUG
1272 pcm_dbg(substream->pcm,
1273 "pcm_oss: readv: recovering from %s\n",
1274 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1275 "XRUN" : "SUSPEND");
1276 #endif
1277 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1278 if (ret < 0)
1279 break;
1280 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1281 ret = snd_pcm_oss_prepare(substream);
1282 if (ret < 0)
1283 break;
1284 }
1285 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1286 if (ret != -EPIPE && ret != -ESTRPIPE)
1287 break;
1288 }
1289 return ret;
1290 }
1291 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1292
1293 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1294 {
1295 struct snd_pcm_runtime *runtime = substream->runtime;
1296 snd_pcm_sframes_t frames, frames1;
1297 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1298 if (runtime->oss.plugin_first) {
1299 struct snd_pcm_plugin_channel *channels;
1300 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1301 if (!in_kernel) {
1302 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1303 return -EFAULT;
1304 buf = runtime->oss.buffer;
1305 }
1306 frames = bytes / oss_frame_bytes;
1307 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1308 if (frames1 < 0)
1309 return frames1;
1310 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1311 if (frames1 <= 0)
1312 return frames1;
1313 bytes = frames1 * oss_frame_bytes;
1314 } else
1315 #endif
1316 {
1317 frames = bytes_to_frames(runtime, bytes);
1318 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1319 if (frames1 <= 0)
1320 return frames1;
1321 bytes = frames_to_bytes(runtime, frames1);
1322 }
1323 return bytes;
1324 }
1325
1326 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1327 {
1328 size_t xfer = 0;
1329 ssize_t tmp;
1330 struct snd_pcm_runtime *runtime = substream->runtime;
1331
1332 if (atomic_read(&substream->mmap_count))
1333 return -ENXIO;
1334
1335 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1336 return tmp;
1337 while (bytes > 0) {
1338 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1339 tmp = -ERESTARTSYS;
1340 break;
1341 }
1342 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1343 tmp = bytes;
1344 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1345 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1346 if (tmp > 0) {
1347 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1348 tmp = -EFAULT;
1349 goto err;
1350 }
1351 }
1352 runtime->oss.buffer_used += tmp;
1353 buf += tmp;
1354 bytes -= tmp;
1355 xfer += tmp;
1356 if (substream->oss.setup.partialfrag ||
1357 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1358 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1359 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1360 if (tmp <= 0)
1361 goto err;
1362 runtime->oss.bytes += tmp;
1363 runtime->oss.period_ptr += tmp;
1364 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1365 if (runtime->oss.period_ptr == 0 ||
1366 runtime->oss.period_ptr == runtime->oss.buffer_used)
1367 runtime->oss.buffer_used = 0;
1368 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1369 tmp = -EAGAIN;
1370 goto err;
1371 }
1372 }
1373 } else {
1374 tmp = snd_pcm_oss_write2(substream,
1375 (const char __force *)buf,
1376 runtime->oss.period_bytes, 0);
1377 if (tmp <= 0)
1378 goto err;
1379 runtime->oss.bytes += tmp;
1380 buf += tmp;
1381 bytes -= tmp;
1382 xfer += tmp;
1383 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1384 tmp != runtime->oss.period_bytes)
1385 tmp = -EAGAIN;
1386 }
1387 err:
1388 mutex_unlock(&runtime->oss.params_lock);
1389 if (tmp < 0)
1390 break;
1391 if (signal_pending(current)) {
1392 tmp = -ERESTARTSYS;
1393 break;
1394 }
1395 tmp = 0;
1396 }
1397 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1398 }
1399
1400 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1401 {
1402 struct snd_pcm_runtime *runtime = substream->runtime;
1403 snd_pcm_sframes_t frames, frames1;
1404 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1405 char __user *final_dst = (char __force __user *)buf;
1406 if (runtime->oss.plugin_first) {
1407 struct snd_pcm_plugin_channel *channels;
1408 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1409 if (!in_kernel)
1410 buf = runtime->oss.buffer;
1411 frames = bytes / oss_frame_bytes;
1412 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1413 if (frames1 < 0)
1414 return frames1;
1415 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1416 if (frames1 <= 0)
1417 return frames1;
1418 bytes = frames1 * oss_frame_bytes;
1419 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1420 return -EFAULT;
1421 } else
1422 #endif
1423 {
1424 frames = bytes_to_frames(runtime, bytes);
1425 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1426 if (frames1 <= 0)
1427 return frames1;
1428 bytes = frames_to_bytes(runtime, frames1);
1429 }
1430 return bytes;
1431 }
1432
1433 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1434 {
1435 size_t xfer = 0;
1436 ssize_t tmp;
1437 struct snd_pcm_runtime *runtime = substream->runtime;
1438
1439 if (atomic_read(&substream->mmap_count))
1440 return -ENXIO;
1441
1442 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1443 return tmp;
1444 while (bytes > 0) {
1445 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1446 tmp = -ERESTARTSYS;
1447 break;
1448 }
1449 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1450 if (runtime->oss.buffer_used == 0) {
1451 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1452 if (tmp <= 0)
1453 goto err;
1454 runtime->oss.bytes += tmp;
1455 runtime->oss.period_ptr = tmp;
1456 runtime->oss.buffer_used = tmp;
1457 }
1458 tmp = bytes;
1459 if ((size_t) tmp > runtime->oss.buffer_used)
1460 tmp = runtime->oss.buffer_used;
1461 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1462 tmp = -EFAULT;
1463 goto err;
1464 }
1465 buf += tmp;
1466 bytes -= tmp;
1467 xfer += tmp;
1468 runtime->oss.buffer_used -= tmp;
1469 } else {
1470 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1471 runtime->oss.period_bytes, 0);
1472 if (tmp <= 0)
1473 goto err;
1474 runtime->oss.bytes += tmp;
1475 buf += tmp;
1476 bytes -= tmp;
1477 xfer += tmp;
1478 }
1479 err:
1480 mutex_unlock(&runtime->oss.params_lock);
1481 if (tmp < 0)
1482 break;
1483 if (signal_pending(current)) {
1484 tmp = -ERESTARTSYS;
1485 break;
1486 }
1487 tmp = 0;
1488 }
1489 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1490 }
1491
1492 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1493 {
1494 struct snd_pcm_substream *substream;
1495 struct snd_pcm_runtime *runtime;
1496 int i;
1497
1498 for (i = 0; i < 2; i++) {
1499 substream = pcm_oss_file->streams[i];
1500 if (!substream)
1501 continue;
1502 runtime = substream->runtime;
1503 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1504 runtime->oss.prepare = 1;
1505 runtime->oss.buffer_used = 0;
1506 runtime->oss.prev_hw_ptr_period = 0;
1507 runtime->oss.period_ptr = 0;
1508 }
1509 return 0;
1510 }
1511
1512 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1513 {
1514 struct snd_pcm_substream *substream;
1515 int err;
1516
1517 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1518 if (substream != NULL) {
1519 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1520 return err;
1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1522 }
1523 /* note: all errors from the start action are ignored */
1524 /* OSS apps do not know, how to handle them */
1525 return 0;
1526 }
1527
1528 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1529 {
1530 struct snd_pcm_runtime *runtime;
1531 ssize_t result = 0;
1532 snd_pcm_state_t state;
1533 long res;
1534 wait_queue_entry_t wait;
1535
1536 runtime = substream->runtime;
1537 init_waitqueue_entry(&wait, current);
1538 add_wait_queue(&runtime->sleep, &wait);
1539 #ifdef OSS_DEBUG
1540 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1541 #endif
1542 while (1) {
1543 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1544 if (result > 0) {
1545 runtime->oss.buffer_used = 0;
1546 result = 0;
1547 break;
1548 }
1549 if (result != 0 && result != -EAGAIN)
1550 break;
1551 result = 0;
1552 set_current_state(TASK_INTERRUPTIBLE);
1553 snd_pcm_stream_lock_irq(substream);
1554 state = runtime->status->state;
1555 snd_pcm_stream_unlock_irq(substream);
1556 if (state != SNDRV_PCM_STATE_RUNNING) {
1557 set_current_state(TASK_RUNNING);
1558 break;
1559 }
1560 res = schedule_timeout(10 * HZ);
1561 if (signal_pending(current)) {
1562 result = -ERESTARTSYS;
1563 break;
1564 }
1565 if (res == 0) {
1566 pcm_err(substream->pcm,
1567 "OSS sync error - DMA timeout\n");
1568 result = -EIO;
1569 break;
1570 }
1571 }
1572 remove_wait_queue(&runtime->sleep, &wait);
1573 return result;
1574 }
1575
1576 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1577 {
1578 int err = 0;
1579 unsigned int saved_f_flags;
1580 struct snd_pcm_substream *substream;
1581 struct snd_pcm_runtime *runtime;
1582 snd_pcm_format_t format;
1583 unsigned long width;
1584 size_t size;
1585
1586 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1587 if (substream != NULL) {
1588 runtime = substream->runtime;
1589 if (atomic_read(&substream->mmap_count))
1590 goto __direct;
1591 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1592 return err;
1593 format = snd_pcm_oss_format_from(runtime->oss.format);
1594 width = snd_pcm_format_physical_width(format);
1595 mutex_lock(&runtime->oss.params_lock);
1596 if (runtime->oss.buffer_used > 0) {
1597 #ifdef OSS_DEBUG
1598 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1599 #endif
1600 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1601 snd_pcm_format_set_silence(format,
1602 runtime->oss.buffer + runtime->oss.buffer_used,
1603 size);
1604 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1605 if (err < 0) {
1606 mutex_unlock(&runtime->oss.params_lock);
1607 return err;
1608 }
1609 } else if (runtime->oss.period_ptr > 0) {
1610 #ifdef OSS_DEBUG
1611 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1612 #endif
1613 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1614 snd_pcm_format_set_silence(format,
1615 runtime->oss.buffer,
1616 size * 8 / width);
1617 err = snd_pcm_oss_sync1(substream, size);
1618 if (err < 0) {
1619 mutex_unlock(&runtime->oss.params_lock);
1620 return err;
1621 }
1622 }
1623 /*
1624 * The ALSA's period might be a bit large than OSS one.
1625 * Fill the remain portion of ALSA period with zeros.
1626 */
1627 size = runtime->control->appl_ptr % runtime->period_size;
1628 if (size > 0) {
1629 size = runtime->period_size - size;
1630 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1631 snd_pcm_lib_write(substream, NULL, size);
1632 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1633 snd_pcm_lib_writev(substream, NULL, size);
1634 }
1635 mutex_unlock(&runtime->oss.params_lock);
1636 /*
1637 * finish sync: drain the buffer
1638 */
1639 __direct:
1640 saved_f_flags = substream->f_flags;
1641 substream->f_flags &= ~O_NONBLOCK;
1642 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1643 substream->f_flags = saved_f_flags;
1644 if (err < 0)
1645 return err;
1646 runtime->oss.prepare = 1;
1647 }
1648
1649 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1650 if (substream != NULL) {
1651 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1652 return err;
1653 runtime = substream->runtime;
1654 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1655 if (err < 0)
1656 return err;
1657 runtime->oss.buffer_used = 0;
1658 runtime->oss.prepare = 1;
1659 }
1660 return 0;
1661 }
1662
1663 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1664 {
1665 int idx;
1666
1667 for (idx = 1; idx >= 0; --idx) {
1668 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1669 struct snd_pcm_runtime *runtime;
1670 if (substream == NULL)
1671 continue;
1672 runtime = substream->runtime;
1673 if (rate < 1000)
1674 rate = 1000;
1675 else if (rate > 192000)
1676 rate = 192000;
1677 if (runtime->oss.rate != rate) {
1678 runtime->oss.params = 1;
1679 runtime->oss.rate = rate;
1680 }
1681 }
1682 return snd_pcm_oss_get_rate(pcm_oss_file);
1683 }
1684
1685 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1686 {
1687 struct snd_pcm_substream *substream;
1688 int err;
1689
1690 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1691 return err;
1692 return substream->runtime->oss.rate;
1693 }
1694
1695 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1696 {
1697 int idx;
1698 if (channels < 1)
1699 channels = 1;
1700 if (channels > 128)
1701 return -EINVAL;
1702 for (idx = 1; idx >= 0; --idx) {
1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704 struct snd_pcm_runtime *runtime;
1705 if (substream == NULL)
1706 continue;
1707 runtime = substream->runtime;
1708 if (runtime->oss.channels != channels) {
1709 runtime->oss.params = 1;
1710 runtime->oss.channels = channels;
1711 }
1712 }
1713 return snd_pcm_oss_get_channels(pcm_oss_file);
1714 }
1715
1716 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1717 {
1718 struct snd_pcm_substream *substream;
1719 int err;
1720
1721 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1722 return err;
1723 return substream->runtime->oss.channels;
1724 }
1725
1726 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1727 {
1728 struct snd_pcm_substream *substream;
1729 int err;
1730
1731 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1732 return err;
1733 return substream->runtime->oss.period_bytes;
1734 }
1735
1736 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1737 {
1738 struct snd_pcm_substream *substream;
1739 int err;
1740 int direct;
1741 struct snd_pcm_hw_params *params;
1742 unsigned int formats = 0;
1743 const struct snd_mask *format_mask;
1744 int fmt;
1745
1746 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1747 return err;
1748 if (atomic_read(&substream->mmap_count))
1749 direct = 1;
1750 else
1751 direct = substream->oss.setup.direct;
1752 if (!direct)
1753 return AFMT_MU_LAW | AFMT_U8 |
1754 AFMT_S16_LE | AFMT_S16_BE |
1755 AFMT_S8 | AFMT_U16_LE |
1756 AFMT_U16_BE |
1757 AFMT_S32_LE | AFMT_S32_BE |
1758 AFMT_S24_LE | AFMT_S24_BE |
1759 AFMT_S24_PACKED;
1760 params = kmalloc(sizeof(*params), GFP_KERNEL);
1761 if (!params)
1762 return -ENOMEM;
1763 _snd_pcm_hw_params_any(params);
1764 err = snd_pcm_hw_refine(substream, params);
1765 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1766 kfree(params);
1767 if (err < 0)
1768 return err;
1769 for (fmt = 0; fmt < 32; ++fmt) {
1770 if (snd_mask_test(format_mask, fmt)) {
1771 int f = snd_pcm_oss_format_to(fmt);
1772 if (f >= 0)
1773 formats |= f;
1774 }
1775 }
1776 return formats;
1777 }
1778
1779 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1780 {
1781 int formats, idx;
1782
1783 if (format != AFMT_QUERY) {
1784 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1785 if (formats < 0)
1786 return formats;
1787 if (!(formats & format))
1788 format = AFMT_U8;
1789 for (idx = 1; idx >= 0; --idx) {
1790 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1791 struct snd_pcm_runtime *runtime;
1792 if (substream == NULL)
1793 continue;
1794 runtime = substream->runtime;
1795 if (runtime->oss.format != format) {
1796 runtime->oss.params = 1;
1797 runtime->oss.format = format;
1798 }
1799 }
1800 }
1801 return snd_pcm_oss_get_format(pcm_oss_file);
1802 }
1803
1804 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1805 {
1806 struct snd_pcm_substream *substream;
1807 int err;
1808
1809 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1810 return err;
1811 return substream->runtime->oss.format;
1812 }
1813
1814 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1815 {
1816 struct snd_pcm_runtime *runtime;
1817
1818 if (substream == NULL)
1819 return 0;
1820 runtime = substream->runtime;
1821 if (subdivide == 0) {
1822 subdivide = runtime->oss.subdivision;
1823 if (subdivide == 0)
1824 subdivide = 1;
1825 return subdivide;
1826 }
1827 if (runtime->oss.subdivision || runtime->oss.fragshift)
1828 return -EINVAL;
1829 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1830 subdivide != 8 && subdivide != 16)
1831 return -EINVAL;
1832 runtime->oss.subdivision = subdivide;
1833 runtime->oss.params = 1;
1834 return subdivide;
1835 }
1836
1837 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1838 {
1839 int err = -EINVAL, idx;
1840
1841 for (idx = 1; idx >= 0; --idx) {
1842 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1843 if (substream == NULL)
1844 continue;
1845 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1846 return err;
1847 }
1848 return err;
1849 }
1850
1851 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1852 {
1853 struct snd_pcm_runtime *runtime;
1854
1855 if (substream == NULL)
1856 return 0;
1857 runtime = substream->runtime;
1858 if (runtime->oss.subdivision || runtime->oss.fragshift)
1859 return -EINVAL;
1860 runtime->oss.fragshift = val & 0xffff;
1861 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1862 if (runtime->oss.fragshift < 4) /* < 16 */
1863 runtime->oss.fragshift = 4;
1864 if (runtime->oss.maxfrags < 2)
1865 runtime->oss.maxfrags = 2;
1866 runtime->oss.params = 1;
1867 return 0;
1868 }
1869
1870 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1871 {
1872 int err = -EINVAL, idx;
1873
1874 for (idx = 1; idx >= 0; --idx) {
1875 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1876 if (substream == NULL)
1877 continue;
1878 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1879 return err;
1880 }
1881 return err;
1882 }
1883
1884 static int snd_pcm_oss_nonblock(struct file * file)
1885 {
1886 spin_lock(&file->f_lock);
1887 file->f_flags |= O_NONBLOCK;
1888 spin_unlock(&file->f_lock);
1889 return 0;
1890 }
1891
1892 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1893 {
1894
1895 if (substream == NULL) {
1896 res &= ~DSP_CAP_DUPLEX;
1897 return res;
1898 }
1899 #ifdef DSP_CAP_MULTI
1900 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1901 if (substream->pstr->substream_count > 1)
1902 res |= DSP_CAP_MULTI;
1903 #endif
1904 /* DSP_CAP_REALTIME is set all times: */
1905 /* all ALSA drivers can return actual pointer in ring buffer */
1906 #if defined(DSP_CAP_REALTIME) && 0
1907 {
1908 struct snd_pcm_runtime *runtime = substream->runtime;
1909 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1910 res &= ~DSP_CAP_REALTIME;
1911 }
1912 #endif
1913 return res;
1914 }
1915
1916 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1917 {
1918 int result, idx;
1919
1920 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1921 for (idx = 0; idx < 2; idx++) {
1922 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1923 result = snd_pcm_oss_get_caps1(substream, result);
1924 }
1925 result |= 0x0001; /* revision - same as SB AWE 64 */
1926 return result;
1927 }
1928
1929 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1930 snd_pcm_uframes_t hw_ptr)
1931 {
1932 struct snd_pcm_runtime *runtime = substream->runtime;
1933 snd_pcm_uframes_t appl_ptr;
1934 appl_ptr = hw_ptr + runtime->buffer_size;
1935 appl_ptr %= runtime->boundary;
1936 runtime->control->appl_ptr = appl_ptr;
1937 }
1938
1939 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1940 {
1941 struct snd_pcm_runtime *runtime;
1942 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1943 int err, cmd;
1944
1945 #ifdef OSS_DEBUG
1946 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1947 #endif
1948
1949 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1950 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1951
1952 if (psubstream) {
1953 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1954 return err;
1955 }
1956 if (csubstream) {
1957 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1958 return err;
1959 }
1960 if (psubstream) {
1961 runtime = psubstream->runtime;
1962 if (trigger & PCM_ENABLE_OUTPUT) {
1963 if (runtime->oss.trigger)
1964 goto _skip1;
1965 if (atomic_read(&psubstream->mmap_count))
1966 snd_pcm_oss_simulate_fill(psubstream,
1967 get_hw_ptr_period(runtime));
1968 runtime->oss.trigger = 1;
1969 runtime->start_threshold = 1;
1970 cmd = SNDRV_PCM_IOCTL_START;
1971 } else {
1972 if (!runtime->oss.trigger)
1973 goto _skip1;
1974 runtime->oss.trigger = 0;
1975 runtime->start_threshold = runtime->boundary;
1976 cmd = SNDRV_PCM_IOCTL_DROP;
1977 runtime->oss.prepare = 1;
1978 }
1979 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1980 if (err < 0)
1981 return err;
1982 }
1983 _skip1:
1984 if (csubstream) {
1985 runtime = csubstream->runtime;
1986 if (trigger & PCM_ENABLE_INPUT) {
1987 if (runtime->oss.trigger)
1988 goto _skip2;
1989 runtime->oss.trigger = 1;
1990 runtime->start_threshold = 1;
1991 cmd = SNDRV_PCM_IOCTL_START;
1992 } else {
1993 if (!runtime->oss.trigger)
1994 goto _skip2;
1995 runtime->oss.trigger = 0;
1996 runtime->start_threshold = runtime->boundary;
1997 cmd = SNDRV_PCM_IOCTL_DROP;
1998 runtime->oss.prepare = 1;
1999 }
2000 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2001 if (err < 0)
2002 return err;
2003 }
2004 _skip2:
2005 return 0;
2006 }
2007
2008 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2009 {
2010 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2011 int result = 0;
2012
2013 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2014 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2015 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2016 result |= PCM_ENABLE_OUTPUT;
2017 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2018 result |= PCM_ENABLE_INPUT;
2019 return result;
2020 }
2021
2022 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2023 {
2024 struct snd_pcm_substream *substream;
2025 struct snd_pcm_runtime *runtime;
2026 snd_pcm_sframes_t delay;
2027 int err;
2028
2029 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2030 if (substream == NULL)
2031 return -EINVAL;
2032 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2033 return err;
2034 runtime = substream->runtime;
2035 if (runtime->oss.params || runtime->oss.prepare)
2036 return 0;
2037 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2038 if (err == -EPIPE)
2039 delay = 0; /* hack for broken OSS applications */
2040 else if (err < 0)
2041 return err;
2042 return snd_pcm_oss_bytes(substream, delay);
2043 }
2044
2045 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2046 {
2047 struct snd_pcm_substream *substream;
2048 struct snd_pcm_runtime *runtime;
2049 snd_pcm_sframes_t delay;
2050 int fixup;
2051 struct count_info info;
2052 int err;
2053
2054 if (_info == NULL)
2055 return -EFAULT;
2056 substream = pcm_oss_file->streams[stream];
2057 if (substream == NULL)
2058 return -EINVAL;
2059 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2060 return err;
2061 runtime = substream->runtime;
2062 if (runtime->oss.params || runtime->oss.prepare) {
2063 memset(&info, 0, sizeof(info));
2064 if (copy_to_user(_info, &info, sizeof(info)))
2065 return -EFAULT;
2066 return 0;
2067 }
2068 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2069 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2070 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2071 err = 0;
2072 delay = 0;
2073 fixup = 0;
2074 } else {
2075 fixup = runtime->oss.buffer_used;
2076 }
2077 } else {
2078 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2079 fixup = -runtime->oss.buffer_used;
2080 }
2081 if (err < 0)
2082 return err;
2083 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2084 if (atomic_read(&substream->mmap_count)) {
2085 snd_pcm_sframes_t n;
2086 delay = get_hw_ptr_period(runtime);
2087 n = delay - runtime->oss.prev_hw_ptr_period;
2088 if (n < 0)
2089 n += runtime->boundary;
2090 info.blocks = n / runtime->period_size;
2091 runtime->oss.prev_hw_ptr_period = delay;
2092 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2093 snd_pcm_oss_simulate_fill(substream, delay);
2094 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2095 } else {
2096 delay = snd_pcm_oss_bytes(substream, delay);
2097 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2098 if (substream->oss.setup.buggyptr)
2099 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2100 else
2101 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2102 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2103 } else {
2104 delay += fixup;
2105 info.blocks = delay / runtime->oss.period_bytes;
2106 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2107 }
2108 }
2109 if (copy_to_user(_info, &info, sizeof(info)))
2110 return -EFAULT;
2111 return 0;
2112 }
2113
2114 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2115 {
2116 struct snd_pcm_substream *substream;
2117 struct snd_pcm_runtime *runtime;
2118 snd_pcm_sframes_t avail;
2119 int fixup;
2120 struct audio_buf_info info;
2121 int err;
2122
2123 if (_info == NULL)
2124 return -EFAULT;
2125 substream = pcm_oss_file->streams[stream];
2126 if (substream == NULL)
2127 return -EINVAL;
2128 runtime = substream->runtime;
2129
2130 if (runtime->oss.params &&
2131 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2132 return err;
2133
2134 info.fragsize = runtime->oss.period_bytes;
2135 info.fragstotal = runtime->periods;
2136 if (runtime->oss.prepare) {
2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2138 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2139 info.fragments = runtime->oss.periods;
2140 } else {
2141 info.bytes = 0;
2142 info.fragments = 0;
2143 }
2144 } else {
2145 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2147 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2148 avail = runtime->buffer_size;
2149 err = 0;
2150 fixup = 0;
2151 } else {
2152 avail = runtime->buffer_size - avail;
2153 fixup = -runtime->oss.buffer_used;
2154 }
2155 } else {
2156 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2157 fixup = runtime->oss.buffer_used;
2158 }
2159 if (err < 0)
2160 return err;
2161 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2162 info.fragments = info.bytes / runtime->oss.period_bytes;
2163 }
2164
2165 #ifdef OSS_DEBUG
2166 pcm_dbg(substream->pcm,
2167 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2168 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2169 #endif
2170 if (copy_to_user(_info, &info, sizeof(info)))
2171 return -EFAULT;
2172 return 0;
2173 }
2174
2175 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2176 {
2177 // it won't be probably implemented
2178 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2179 return -EINVAL;
2180 }
2181
2182 static const char *strip_task_path(const char *path)
2183 {
2184 const char *ptr, *ptrl = NULL;
2185 for (ptr = path; *ptr; ptr++) {
2186 if (*ptr == '/')
2187 ptrl = ptr + 1;
2188 }
2189 return ptrl;
2190 }
2191
2192 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2193 const char *task_name,
2194 struct snd_pcm_oss_setup *rsetup)
2195 {
2196 struct snd_pcm_oss_setup *setup;
2197
2198 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2199 do {
2200 for (setup = pcm->streams[stream].oss.setup_list; setup;
2201 setup = setup->next) {
2202 if (!strcmp(setup->task_name, task_name))
2203 goto out;
2204 }
2205 } while ((task_name = strip_task_path(task_name)) != NULL);
2206 out:
2207 if (setup)
2208 *rsetup = *setup;
2209 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2210 }
2211
2212 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2213 {
2214 struct snd_pcm_runtime *runtime;
2215 runtime = substream->runtime;
2216 vfree(runtime->oss.buffer);
2217 runtime->oss.buffer = NULL;
2218 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2219 snd_pcm_oss_plugin_clear(substream);
2220 #endif
2221 substream->oss.oss = 0;
2222 }
2223
2224 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2225 struct snd_pcm_oss_setup *setup,
2226 int minor)
2227 {
2228 struct snd_pcm_runtime *runtime;
2229
2230 substream->oss.oss = 1;
2231 substream->oss.setup = *setup;
2232 if (setup->nonblock)
2233 substream->f_flags |= O_NONBLOCK;
2234 else if (setup->block)
2235 substream->f_flags &= ~O_NONBLOCK;
2236 runtime = substream->runtime;
2237 runtime->oss.params = 1;
2238 runtime->oss.trigger = 1;
2239 runtime->oss.rate = 8000;
2240 mutex_init(&runtime->oss.params_lock);
2241 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2242 case SNDRV_MINOR_OSS_PCM_8:
2243 runtime->oss.format = AFMT_U8;
2244 break;
2245 case SNDRV_MINOR_OSS_PCM_16:
2246 runtime->oss.format = AFMT_S16_LE;
2247 break;
2248 default:
2249 runtime->oss.format = AFMT_MU_LAW;
2250 }
2251 runtime->oss.channels = 1;
2252 runtime->oss.fragshift = 0;
2253 runtime->oss.maxfrags = 0;
2254 runtime->oss.subdivision = 0;
2255 substream->pcm_release = snd_pcm_oss_release_substream;
2256 }
2257
2258 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2259 {
2260 int cidx;
2261 if (!pcm_oss_file)
2262 return 0;
2263 for (cidx = 0; cidx < 2; ++cidx) {
2264 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2265 if (substream)
2266 snd_pcm_release_substream(substream);
2267 }
2268 kfree(pcm_oss_file);
2269 return 0;
2270 }
2271
2272 static int snd_pcm_oss_open_file(struct file *file,
2273 struct snd_pcm *pcm,
2274 struct snd_pcm_oss_file **rpcm_oss_file,
2275 int minor,
2276 struct snd_pcm_oss_setup *setup)
2277 {
2278 int idx, err;
2279 struct snd_pcm_oss_file *pcm_oss_file;
2280 struct snd_pcm_substream *substream;
2281 fmode_t f_mode = file->f_mode;
2282
2283 if (rpcm_oss_file)
2284 *rpcm_oss_file = NULL;
2285
2286 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2287 if (pcm_oss_file == NULL)
2288 return -ENOMEM;
2289
2290 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2291 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2292 f_mode = FMODE_WRITE;
2293
2294 file->f_flags &= ~O_APPEND;
2295 for (idx = 0; idx < 2; idx++) {
2296 if (setup[idx].disable)
2297 continue;
2298 if (! pcm->streams[idx].substream_count)
2299 continue; /* no matching substream */
2300 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2301 if (! (f_mode & FMODE_WRITE))
2302 continue;
2303 } else {
2304 if (! (f_mode & FMODE_READ))
2305 continue;
2306 }
2307 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2308 if (err < 0) {
2309 snd_pcm_oss_release_file(pcm_oss_file);
2310 return err;
2311 }
2312
2313 pcm_oss_file->streams[idx] = substream;
2314 substream->file = pcm_oss_file;
2315 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2316 }
2317
2318 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2319 snd_pcm_oss_release_file(pcm_oss_file);
2320 return -EINVAL;
2321 }
2322
2323 file->private_data = pcm_oss_file;
2324 if (rpcm_oss_file)
2325 *rpcm_oss_file = pcm_oss_file;
2326 return 0;
2327 }
2328
2329
2330 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2331 {
2332 unsigned int idx;
2333
2334 if (snd_BUG_ON(!task || !name || size < 2))
2335 return -EINVAL;
2336 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2337 name[idx] = task->comm[idx];
2338 name[idx] = '\0';
2339 return 0;
2340 }
2341
2342 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2343 {
2344 int err;
2345 char task_name[32];
2346 struct snd_pcm *pcm;
2347 struct snd_pcm_oss_file *pcm_oss_file;
2348 struct snd_pcm_oss_setup setup[2];
2349 int nonblock;
2350 wait_queue_entry_t wait;
2351
2352 err = nonseekable_open(inode, file);
2353 if (err < 0)
2354 return err;
2355
2356 pcm = snd_lookup_oss_minor_data(iminor(inode),
2357 SNDRV_OSS_DEVICE_TYPE_PCM);
2358 if (pcm == NULL) {
2359 err = -ENODEV;
2360 goto __error1;
2361 }
2362 err = snd_card_file_add(pcm->card, file);
2363 if (err < 0)
2364 goto __error1;
2365 if (!try_module_get(pcm->card->module)) {
2366 err = -EFAULT;
2367 goto __error2;
2368 }
2369 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2370 err = -EFAULT;
2371 goto __error;
2372 }
2373 memset(setup, 0, sizeof(setup));
2374 if (file->f_mode & FMODE_WRITE)
2375 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2376 task_name, &setup[0]);
2377 if (file->f_mode & FMODE_READ)
2378 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2379 task_name, &setup[1]);
2380
2381 nonblock = !!(file->f_flags & O_NONBLOCK);
2382 if (!nonblock)
2383 nonblock = nonblock_open;
2384
2385 init_waitqueue_entry(&wait, current);
2386 add_wait_queue(&pcm->open_wait, &wait);
2387 mutex_lock(&pcm->open_mutex);
2388 while (1) {
2389 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2390 iminor(inode), setup);
2391 if (err >= 0)
2392 break;
2393 if (err == -EAGAIN) {
2394 if (nonblock) {
2395 err = -EBUSY;
2396 break;
2397 }
2398 } else
2399 break;
2400 set_current_state(TASK_INTERRUPTIBLE);
2401 mutex_unlock(&pcm->open_mutex);
2402 schedule();
2403 mutex_lock(&pcm->open_mutex);
2404 if (pcm->card->shutdown) {
2405 err = -ENODEV;
2406 break;
2407 }
2408 if (signal_pending(current)) {
2409 err = -ERESTARTSYS;
2410 break;
2411 }
2412 }
2413 remove_wait_queue(&pcm->open_wait, &wait);
2414 mutex_unlock(&pcm->open_mutex);
2415 if (err < 0)
2416 goto __error;
2417 snd_card_unref(pcm->card);
2418 return err;
2419
2420 __error:
2421 module_put(pcm->card->module);
2422 __error2:
2423 snd_card_file_remove(pcm->card, file);
2424 __error1:
2425 if (pcm)
2426 snd_card_unref(pcm->card);
2427 return err;
2428 }
2429
2430 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2431 {
2432 struct snd_pcm *pcm;
2433 struct snd_pcm_substream *substream;
2434 struct snd_pcm_oss_file *pcm_oss_file;
2435
2436 pcm_oss_file = file->private_data;
2437 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2438 if (substream == NULL)
2439 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2440 if (snd_BUG_ON(!substream))
2441 return -ENXIO;
2442 pcm = substream->pcm;
2443 if (!pcm->card->shutdown)
2444 snd_pcm_oss_sync(pcm_oss_file);
2445 mutex_lock(&pcm->open_mutex);
2446 snd_pcm_oss_release_file(pcm_oss_file);
2447 mutex_unlock(&pcm->open_mutex);
2448 wake_up(&pcm->open_wait);
2449 module_put(pcm->card->module);
2450 snd_card_file_remove(pcm->card, file);
2451 return 0;
2452 }
2453
2454 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2455 {
2456 struct snd_pcm_oss_file *pcm_oss_file;
2457 int __user *p = (int __user *)arg;
2458 int res;
2459
2460 pcm_oss_file = file->private_data;
2461 if (cmd == OSS_GETVERSION)
2462 return put_user(SNDRV_OSS_VERSION, p);
2463 if (cmd == OSS_ALSAEMULVER)
2464 return put_user(1, p);
2465 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2466 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2467 struct snd_pcm_substream *substream;
2468 int idx;
2469 for (idx = 0; idx < 2; ++idx) {
2470 substream = pcm_oss_file->streams[idx];
2471 if (substream != NULL)
2472 break;
2473 }
2474 if (snd_BUG_ON(idx >= 2))
2475 return -ENXIO;
2476 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2477 }
2478 #endif
2479 if (((cmd >> 8) & 0xff) != 'P')
2480 return -EINVAL;
2481 #ifdef OSS_DEBUG
2482 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2483 #endif
2484 switch (cmd) {
2485 case SNDCTL_DSP_RESET:
2486 return snd_pcm_oss_reset(pcm_oss_file);
2487 case SNDCTL_DSP_SYNC:
2488 return snd_pcm_oss_sync(pcm_oss_file);
2489 case SNDCTL_DSP_SPEED:
2490 if (get_user(res, p))
2491 return -EFAULT;
2492 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2493 return res;
2494 return put_user(res, p);
2495 case SOUND_PCM_READ_RATE:
2496 res = snd_pcm_oss_get_rate(pcm_oss_file);
2497 if (res < 0)
2498 return res;
2499 return put_user(res, p);
2500 case SNDCTL_DSP_STEREO:
2501 if (get_user(res, p))
2502 return -EFAULT;
2503 res = res > 0 ? 2 : 1;
2504 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2505 return res;
2506 return put_user(--res, p);
2507 case SNDCTL_DSP_GETBLKSIZE:
2508 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2509 if (res < 0)
2510 return res;
2511 return put_user(res, p);
2512 case SNDCTL_DSP_SETFMT:
2513 if (get_user(res, p))
2514 return -EFAULT;
2515 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2516 if (res < 0)
2517 return res;
2518 return put_user(res, p);
2519 case SOUND_PCM_READ_BITS:
2520 res = snd_pcm_oss_get_format(pcm_oss_file);
2521 if (res < 0)
2522 return res;
2523 return put_user(res, p);
2524 case SNDCTL_DSP_CHANNELS:
2525 if (get_user(res, p))
2526 return -EFAULT;
2527 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2528 if (res < 0)
2529 return res;
2530 return put_user(res, p);
2531 case SOUND_PCM_READ_CHANNELS:
2532 res = snd_pcm_oss_get_channels(pcm_oss_file);
2533 if (res < 0)
2534 return res;
2535 return put_user(res, p);
2536 case SOUND_PCM_WRITE_FILTER:
2537 case SOUND_PCM_READ_FILTER:
2538 return -EIO;
2539 case SNDCTL_DSP_POST:
2540 return snd_pcm_oss_post(pcm_oss_file);
2541 case SNDCTL_DSP_SUBDIVIDE:
2542 if (get_user(res, p))
2543 return -EFAULT;
2544 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2545 if (res < 0)
2546 return res;
2547 return put_user(res, p);
2548 case SNDCTL_DSP_SETFRAGMENT:
2549 if (get_user(res, p))
2550 return -EFAULT;
2551 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2552 case SNDCTL_DSP_GETFMTS:
2553 res = snd_pcm_oss_get_formats(pcm_oss_file);
2554 if (res < 0)
2555 return res;
2556 return put_user(res, p);
2557 case SNDCTL_DSP_GETOSPACE:
2558 case SNDCTL_DSP_GETISPACE:
2559 return snd_pcm_oss_get_space(pcm_oss_file,
2560 cmd == SNDCTL_DSP_GETISPACE ?
2561 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2562 (struct audio_buf_info __user *) arg);
2563 case SNDCTL_DSP_NONBLOCK:
2564 return snd_pcm_oss_nonblock(file);
2565 case SNDCTL_DSP_GETCAPS:
2566 res = snd_pcm_oss_get_caps(pcm_oss_file);
2567 if (res < 0)
2568 return res;
2569 return put_user(res, p);
2570 case SNDCTL_DSP_GETTRIGGER:
2571 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2572 if (res < 0)
2573 return res;
2574 return put_user(res, p);
2575 case SNDCTL_DSP_SETTRIGGER:
2576 if (get_user(res, p))
2577 return -EFAULT;
2578 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2579 case SNDCTL_DSP_GETIPTR:
2580 case SNDCTL_DSP_GETOPTR:
2581 return snd_pcm_oss_get_ptr(pcm_oss_file,
2582 cmd == SNDCTL_DSP_GETIPTR ?
2583 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2584 (struct count_info __user *) arg);
2585 case SNDCTL_DSP_MAPINBUF:
2586 case SNDCTL_DSP_MAPOUTBUF:
2587 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2588 cmd == SNDCTL_DSP_MAPINBUF ?
2589 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2590 (struct buffmem_desc __user *) arg);
2591 case SNDCTL_DSP_SETSYNCRO:
2592 /* stop DMA now.. */
2593 return 0;
2594 case SNDCTL_DSP_SETDUPLEX:
2595 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2596 return 0;
2597 return -EIO;
2598 case SNDCTL_DSP_GETODELAY:
2599 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2600 if (res < 0) {
2601 /* it's for sure, some broken apps don't check for error codes */
2602 put_user(0, p);
2603 return res;
2604 }
2605 return put_user(res, p);
2606 case SNDCTL_DSP_PROFILE:
2607 return 0; /* silently ignore */
2608 default:
2609 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2610 }
2611 return -EINVAL;
2612 }
2613
2614 #ifdef CONFIG_COMPAT
2615 /* all compatible */
2616 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2617 unsigned long arg)
2618 {
2619 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2620 }
2621 #else
2622 #define snd_pcm_oss_ioctl_compat NULL
2623 #endif
2624
2625 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2626 {
2627 struct snd_pcm_oss_file *pcm_oss_file;
2628 struct snd_pcm_substream *substream;
2629
2630 pcm_oss_file = file->private_data;
2631 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2632 if (substream == NULL)
2633 return -ENXIO;
2634 substream->f_flags = file->f_flags & O_NONBLOCK;
2635 #ifndef OSS_DEBUG
2636 return snd_pcm_oss_read1(substream, buf, count);
2637 #else
2638 {
2639 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2640 pcm_dbg(substream->pcm,
2641 "pcm_oss: read %li bytes (returned %li bytes)\n",
2642 (long)count, (long)res);
2643 return res;
2644 }
2645 #endif
2646 }
2647
2648 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2649 {
2650 struct snd_pcm_oss_file *pcm_oss_file;
2651 struct snd_pcm_substream *substream;
2652 long result;
2653
2654 pcm_oss_file = file->private_data;
2655 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2656 if (substream == NULL)
2657 return -ENXIO;
2658 substream->f_flags = file->f_flags & O_NONBLOCK;
2659 result = snd_pcm_oss_write1(substream, buf, count);
2660 #ifdef OSS_DEBUG
2661 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2662 (long)count, (long)result);
2663 #endif
2664 return result;
2665 }
2666
2667 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2668 {
2669 struct snd_pcm_runtime *runtime = substream->runtime;
2670 if (atomic_read(&substream->mmap_count))
2671 return runtime->oss.prev_hw_ptr_period !=
2672 get_hw_ptr_period(runtime);
2673 else
2674 return snd_pcm_playback_avail(runtime) >=
2675 runtime->oss.period_frames;
2676 }
2677
2678 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2679 {
2680 struct snd_pcm_runtime *runtime = substream->runtime;
2681 if (atomic_read(&substream->mmap_count))
2682 return runtime->oss.prev_hw_ptr_period !=
2683 get_hw_ptr_period(runtime);
2684 else
2685 return snd_pcm_capture_avail(runtime) >=
2686 runtime->oss.period_frames;
2687 }
2688
2689 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2690 {
2691 struct snd_pcm_oss_file *pcm_oss_file;
2692 __poll_t mask;
2693 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2694
2695 pcm_oss_file = file->private_data;
2696
2697 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2698 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2699
2700 mask = 0;
2701 if (psubstream != NULL) {
2702 struct snd_pcm_runtime *runtime = psubstream->runtime;
2703 poll_wait(file, &runtime->sleep, wait);
2704 snd_pcm_stream_lock_irq(psubstream);
2705 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2706 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2707 snd_pcm_oss_playback_ready(psubstream)))
2708 mask |= EPOLLOUT | EPOLLWRNORM;
2709 snd_pcm_stream_unlock_irq(psubstream);
2710 }
2711 if (csubstream != NULL) {
2712 struct snd_pcm_runtime *runtime = csubstream->runtime;
2713 snd_pcm_state_t ostate;
2714 poll_wait(file, &runtime->sleep, wait);
2715 snd_pcm_stream_lock_irq(csubstream);
2716 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2717 snd_pcm_oss_capture_ready(csubstream))
2718 mask |= EPOLLIN | EPOLLRDNORM;
2719 snd_pcm_stream_unlock_irq(csubstream);
2720 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2721 struct snd_pcm_oss_file ofile;
2722 memset(&ofile, 0, sizeof(ofile));
2723 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2724 runtime->oss.trigger = 0;
2725 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2726 }
2727 }
2728
2729 return mask;
2730 }
2731
2732 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2733 {
2734 struct snd_pcm_oss_file *pcm_oss_file;
2735 struct snd_pcm_substream *substream = NULL;
2736 struct snd_pcm_runtime *runtime;
2737 int err;
2738
2739 #ifdef OSS_DEBUG
2740 pr_debug("pcm_oss: mmap begin\n");
2741 #endif
2742 pcm_oss_file = file->private_data;
2743 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2744 case VM_READ | VM_WRITE:
2745 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2746 if (substream)
2747 break;
2748 /* Fall through */
2749 case VM_READ:
2750 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2751 break;
2752 case VM_WRITE:
2753 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2754 break;
2755 default:
2756 return -EINVAL;
2757 }
2758 /* set VM_READ access as well to fix memset() routines that do
2759 reads before writes (to improve performance) */
2760 area->vm_flags |= VM_READ;
2761 if (substream == NULL)
2762 return -ENXIO;
2763 runtime = substream->runtime;
2764 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2765 return -EIO;
2766 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2767 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2768 else
2769 return -EIO;
2770
2771 if (runtime->oss.params) {
2772 /* use mutex_trylock() for params_lock for avoiding a deadlock
2773 * between mmap_sem and params_lock taken by
2774 * copy_from/to_user() in snd_pcm_oss_write/read()
2775 */
2776 err = snd_pcm_oss_change_params(substream, true);
2777 if (err < 0)
2778 return err;
2779 }
2780 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2781 if (runtime->oss.plugin_first != NULL)
2782 return -EIO;
2783 #endif
2784
2785 if (area->vm_pgoff != 0)
2786 return -EINVAL;
2787
2788 err = snd_pcm_mmap_data(substream, file, area);
2789 if (err < 0)
2790 return err;
2791 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2792 runtime->silence_threshold = 0;
2793 runtime->silence_size = 0;
2794 #ifdef OSS_DEBUG
2795 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2796 runtime->oss.mmap_bytes);
2797 #endif
2798 /* In mmap mode we never stop */
2799 runtime->stop_threshold = runtime->boundary;
2800
2801 return 0;
2802 }
2803
2804 #ifdef CONFIG_SND_VERBOSE_PROCFS
2805 /*
2806 * /proc interface
2807 */
2808
2809 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2810 struct snd_info_buffer *buffer)
2811 {
2812 struct snd_pcm_str *pstr = entry->private_data;
2813 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2814 mutex_lock(&pstr->oss.setup_mutex);
2815 while (setup) {
2816 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2817 setup->task_name,
2818 setup->periods,
2819 setup->period_size,
2820 setup->disable ? " disable" : "",
2821 setup->direct ? " direct" : "",
2822 setup->block ? " block" : "",
2823 setup->nonblock ? " non-block" : "",
2824 setup->partialfrag ? " partial-frag" : "",
2825 setup->nosilence ? " no-silence" : "");
2826 setup = setup->next;
2827 }
2828 mutex_unlock(&pstr->oss.setup_mutex);
2829 }
2830
2831 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2832 {
2833 struct snd_pcm_oss_setup *setup, *setupn;
2834
2835 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2836 setup; setup = setupn) {
2837 setupn = setup->next;
2838 kfree(setup->task_name);
2839 kfree(setup);
2840 }
2841 pstr->oss.setup_list = NULL;
2842 }
2843
2844 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2845 struct snd_info_buffer *buffer)
2846 {
2847 struct snd_pcm_str *pstr = entry->private_data;
2848 char line[128], str[32], task_name[32];
2849 const char *ptr;
2850 int idx1;
2851 struct snd_pcm_oss_setup *setup, *setup1, template;
2852
2853 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2854 mutex_lock(&pstr->oss.setup_mutex);
2855 memset(&template, 0, sizeof(template));
2856 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2857 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2858 snd_pcm_oss_proc_free_setup_list(pstr);
2859 mutex_unlock(&pstr->oss.setup_mutex);
2860 continue;
2861 }
2862 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2863 if (!strcmp(setup->task_name, task_name)) {
2864 template = *setup;
2865 break;
2866 }
2867 }
2868 ptr = snd_info_get_str(str, ptr, sizeof(str));
2869 template.periods = simple_strtoul(str, NULL, 10);
2870 ptr = snd_info_get_str(str, ptr, sizeof(str));
2871 template.period_size = simple_strtoul(str, NULL, 10);
2872 for (idx1 = 31; idx1 >= 0; idx1--)
2873 if (template.period_size & (1 << idx1))
2874 break;
2875 for (idx1--; idx1 >= 0; idx1--)
2876 template.period_size &= ~(1 << idx1);
2877 do {
2878 ptr = snd_info_get_str(str, ptr, sizeof(str));
2879 if (!strcmp(str, "disable")) {
2880 template.disable = 1;
2881 } else if (!strcmp(str, "direct")) {
2882 template.direct = 1;
2883 } else if (!strcmp(str, "block")) {
2884 template.block = 1;
2885 } else if (!strcmp(str, "non-block")) {
2886 template.nonblock = 1;
2887 } else if (!strcmp(str, "partial-frag")) {
2888 template.partialfrag = 1;
2889 } else if (!strcmp(str, "no-silence")) {
2890 template.nosilence = 1;
2891 } else if (!strcmp(str, "buggy-ptr")) {
2892 template.buggyptr = 1;
2893 }
2894 } while (*str);
2895 if (setup == NULL) {
2896 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2897 if (! setup) {
2898 buffer->error = -ENOMEM;
2899 mutex_unlock(&pstr->oss.setup_mutex);
2900 return;
2901 }
2902 if (pstr->oss.setup_list == NULL)
2903 pstr->oss.setup_list = setup;
2904 else {
2905 for (setup1 = pstr->oss.setup_list;
2906 setup1->next; setup1 = setup1->next);
2907 setup1->next = setup;
2908 }
2909 template.task_name = kstrdup(task_name, GFP_KERNEL);
2910 if (! template.task_name) {
2911 kfree(setup);
2912 buffer->error = -ENOMEM;
2913 mutex_unlock(&pstr->oss.setup_mutex);
2914 return;
2915 }
2916 }
2917 *setup = template;
2918 mutex_unlock(&pstr->oss.setup_mutex);
2919 }
2920 }
2921
2922 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2923 {
2924 int stream;
2925 for (stream = 0; stream < 2; ++stream) {
2926 struct snd_info_entry *entry;
2927 struct snd_pcm_str *pstr = &pcm->streams[stream];
2928 if (pstr->substream_count == 0)
2929 continue;
2930 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2931 entry->content = SNDRV_INFO_CONTENT_TEXT;
2932 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2933 entry->c.text.read = snd_pcm_oss_proc_read;
2934 entry->c.text.write = snd_pcm_oss_proc_write;
2935 entry->private_data = pstr;
2936 if (snd_info_register(entry) < 0) {
2937 snd_info_free_entry(entry);
2938 entry = NULL;
2939 }
2940 }
2941 pstr->oss.proc_entry = entry;
2942 }
2943 }
2944
2945 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2946 {
2947 int stream;
2948 for (stream = 0; stream < 2; ++stream) {
2949 struct snd_pcm_str *pstr = &pcm->streams[stream];
2950 snd_info_free_entry(pstr->oss.proc_entry);
2951 pstr->oss.proc_entry = NULL;
2952 snd_pcm_oss_proc_free_setup_list(pstr);
2953 }
2954 }
2955 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2956 #define snd_pcm_oss_proc_init(pcm)
2957 #define snd_pcm_oss_proc_done(pcm)
2958 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2959
2960 /*
2961 * ENTRY functions
2962 */
2963
2964 static const struct file_operations snd_pcm_oss_f_reg =
2965 {
2966 .owner = THIS_MODULE,
2967 .read = snd_pcm_oss_read,
2968 .write = snd_pcm_oss_write,
2969 .open = snd_pcm_oss_open,
2970 .release = snd_pcm_oss_release,
2971 .llseek = no_llseek,
2972 .poll = snd_pcm_oss_poll,
2973 .unlocked_ioctl = snd_pcm_oss_ioctl,
2974 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2975 .mmap = snd_pcm_oss_mmap,
2976 };
2977
2978 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2979 {
2980 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2981 pcm->card, index, &snd_pcm_oss_f_reg,
2982 pcm) < 0) {
2983 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
2984 pcm->card->number, pcm->device);
2985 }
2986 }
2987
2988 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2989 {
2990 pcm->oss.reg = 0;
2991 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2992 char name[128];
2993 int duplex;
2994 register_oss_dsp(pcm, 0);
2995 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2996 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2997 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2998 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2999 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3000 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3001 pcm->card->number,
3002 name);
3003 #endif
3004 pcm->oss.reg++;
3005 pcm->oss.reg_mask |= 1;
3006 }
3007 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3008 register_oss_dsp(pcm, 1);
3009 pcm->oss.reg++;
3010 pcm->oss.reg_mask |= 2;
3011 }
3012
3013 if (pcm->oss.reg)
3014 snd_pcm_oss_proc_init(pcm);
3015
3016 return 0;
3017 }
3018
3019 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3020 {
3021 if (pcm->oss.reg) {
3022 if (pcm->oss.reg_mask & 1) {
3023 pcm->oss.reg_mask &= ~1;
3024 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3025 pcm->card, 0);
3026 }
3027 if (pcm->oss.reg_mask & 2) {
3028 pcm->oss.reg_mask &= ~2;
3029 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3030 pcm->card, 1);
3031 }
3032 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3033 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3034 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3035 #endif
3036 }
3037 pcm->oss.reg = 0;
3038 }
3039 return 0;
3040 }
3041
3042 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3043 {
3044 snd_pcm_oss_disconnect_minor(pcm);
3045 snd_pcm_oss_proc_done(pcm);
3046 return 0;
3047 }
3048
3049 static struct snd_pcm_notify snd_pcm_oss_notify =
3050 {
3051 .n_register = snd_pcm_oss_register_minor,
3052 .n_disconnect = snd_pcm_oss_disconnect_minor,
3053 .n_unregister = snd_pcm_oss_unregister_minor,
3054 };
3055
3056 static int __init alsa_pcm_oss_init(void)
3057 {
3058 int i;
3059 int err;
3060
3061 /* check device map table */
3062 for (i = 0; i < SNDRV_CARDS; i++) {
3063 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3064 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3065 i, dsp_map[i]);
3066 dsp_map[i] = 0;
3067 }
3068 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3069 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3070 i, adsp_map[i]);
3071 adsp_map[i] = 1;
3072 }
3073 }
3074 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3075 return err;
3076 return 0;
3077 }
3078
3079 static void __exit alsa_pcm_oss_exit(void)
3080 {
3081 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3082 }
3083
3084 module_init(alsa_pcm_oss_init)
3085 module_exit(alsa_pcm_oss_exit)
CRIS linux kernel tree