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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.git] / sound / core / oss / pcm_oss.c
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/sched/signal.h>
32 #include <linux/time.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/math64.h>
36 #include <linux/string.h>
37 #include <linux/compat.h>
38 #include <sound/core.h>
39 #include <sound/minors.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include "pcm_plugin.h"
43 #include <sound/info.h>
44 #include <linux/soundcard.h>
45 #include <sound/initval.h>
46 #include <sound/mixer_oss.h>
47
48 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
49
50 static int dsp_map[SNDRV_CARDS];
51 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
52 static bool nonblock_open = 1;
53
54 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
55 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
56 MODULE_LICENSE("GPL");
57 module_param_array(dsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
59 module_param_array(adsp_map, int, NULL, 0444);
60 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
61 module_param(nonblock_open, bool, 0644);
62 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
64 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
65
66 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
67 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
68 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
69
70 /*
71 * helper functions to process hw_params
72 */
73 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
74 {
75 int changed = 0;
76 if (i->min < min) {
77 i->min = min;
78 i->openmin = openmin;
79 changed = 1;
80 } else if (i->min == min && !i->openmin && openmin) {
81 i->openmin = 1;
82 changed = 1;
83 }
84 if (i->integer) {
85 if (i->openmin) {
86 i->min++;
87 i->openmin = 0;
88 }
89 }
90 if (snd_interval_checkempty(i)) {
91 snd_interval_none(i);
92 return -EINVAL;
93 }
94 return changed;
95 }
96
97 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
98 {
99 int changed = 0;
100 if (i->max > max) {
101 i->max = max;
102 i->openmax = openmax;
103 changed = 1;
104 } else if (i->max == max && !i->openmax && openmax) {
105 i->openmax = 1;
106 changed = 1;
107 }
108 if (i->integer) {
109 if (i->openmax) {
110 i->max--;
111 i->openmax = 0;
112 }
113 }
114 if (snd_interval_checkempty(i)) {
115 snd_interval_none(i);
116 return -EINVAL;
117 }
118 return changed;
119 }
120
121 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
122 {
123 struct snd_interval t;
124 t.empty = 0;
125 t.min = t.max = val;
126 t.openmin = t.openmax = 0;
127 t.integer = 1;
128 return snd_interval_refine(i, &t);
129 }
130
131 /**
132 * snd_pcm_hw_param_value_min
133 * @params: the hw_params instance
134 * @var: parameter to retrieve
135 * @dir: pointer to the direction (-1,0,1) or NULL
136 *
137 * Return the minimum value for field PAR.
138 */
139 static unsigned int
140 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
141 snd_pcm_hw_param_t var, int *dir)
142 {
143 if (hw_is_mask(var)) {
144 if (dir)
145 *dir = 0;
146 return snd_mask_min(hw_param_mask_c(params, var));
147 }
148 if (hw_is_interval(var)) {
149 const struct snd_interval *i = hw_param_interval_c(params, var);
150 if (dir)
151 *dir = i->openmin;
152 return snd_interval_min(i);
153 }
154 return -EINVAL;
155 }
156
157 /**
158 * snd_pcm_hw_param_value_max
159 * @params: the hw_params instance
160 * @var: parameter to retrieve
161 * @dir: pointer to the direction (-1,0,1) or NULL
162 *
163 * Return the maximum value for field PAR.
164 */
165 static unsigned int
166 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
167 snd_pcm_hw_param_t var, int *dir)
168 {
169 if (hw_is_mask(var)) {
170 if (dir)
171 *dir = 0;
172 return snd_mask_max(hw_param_mask_c(params, var));
173 }
174 if (hw_is_interval(var)) {
175 const struct snd_interval *i = hw_param_interval_c(params, var);
176 if (dir)
177 *dir = - (int) i->openmax;
178 return snd_interval_max(i);
179 }
180 return -EINVAL;
181 }
182
183 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
184 snd_pcm_hw_param_t var,
185 const struct snd_mask *val)
186 {
187 int changed;
188 changed = snd_mask_refine(hw_param_mask(params, var), val);
189 if (changed) {
190 params->cmask |= 1 << var;
191 params->rmask |= 1 << var;
192 }
193 return changed;
194 }
195
196 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
197 struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var,
199 const struct snd_mask *val)
200 {
201 int changed = _snd_pcm_hw_param_mask(params, var, val);
202 if (changed < 0)
203 return changed;
204 if (params->rmask) {
205 int err = snd_pcm_hw_refine(pcm, params);
206 if (err < 0)
207 return err;
208 }
209 return 0;
210 }
211
212 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
213 snd_pcm_hw_param_t var, unsigned int val,
214 int dir)
215 {
216 int changed;
217 int open = 0;
218 if (dir) {
219 if (dir > 0) {
220 open = 1;
221 } else if (dir < 0) {
222 if (val > 0) {
223 open = 1;
224 val--;
225 }
226 }
227 }
228 if (hw_is_mask(var))
229 changed = snd_mask_refine_min(hw_param_mask(params, var),
230 val + !!open);
231 else if (hw_is_interval(var))
232 changed = snd_interval_refine_min(hw_param_interval(params, var),
233 val, open);
234 else
235 return -EINVAL;
236 if (changed) {
237 params->cmask |= 1 << var;
238 params->rmask |= 1 << var;
239 }
240 return changed;
241 }
242
243 /**
244 * snd_pcm_hw_param_min
245 * @pcm: PCM instance
246 * @params: the hw_params instance
247 * @var: parameter to retrieve
248 * @val: minimal value
249 * @dir: pointer to the direction (-1,0,1) or NULL
250 *
251 * Inside configuration space defined by PARAMS remove from PAR all
252 * values < VAL. Reduce configuration space accordingly.
253 * Return new minimum or -EINVAL if the configuration space is empty
254 */
255 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
256 struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int *dir)
259 {
260 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
261 if (changed < 0)
262 return changed;
263 if (params->rmask) {
264 int err = snd_pcm_hw_refine(pcm, params);
265 if (err < 0)
266 return err;
267 }
268 return snd_pcm_hw_param_value_min(params, var, dir);
269 }
270
271 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
272 snd_pcm_hw_param_t var, unsigned int val,
273 int dir)
274 {
275 int changed;
276 int open = 0;
277 if (dir) {
278 if (dir < 0) {
279 open = 1;
280 } else if (dir > 0) {
281 open = 1;
282 val++;
283 }
284 }
285 if (hw_is_mask(var)) {
286 if (val == 0 && open) {
287 snd_mask_none(hw_param_mask(params, var));
288 changed = -EINVAL;
289 } else
290 changed = snd_mask_refine_max(hw_param_mask(params, var),
291 val - !!open);
292 } else if (hw_is_interval(var))
293 changed = snd_interval_refine_max(hw_param_interval(params, var),
294 val, open);
295 else
296 return -EINVAL;
297 if (changed) {
298 params->cmask |= 1 << var;
299 params->rmask |= 1 << var;
300 }
301 return changed;
302 }
303
304 /**
305 * snd_pcm_hw_param_max
306 * @pcm: PCM instance
307 * @params: the hw_params instance
308 * @var: parameter to retrieve
309 * @val: maximal value
310 * @dir: pointer to the direction (-1,0,1) or NULL
311 *
312 * Inside configuration space defined by PARAMS remove from PAR all
313 * values >= VAL + 1. Reduce configuration space accordingly.
314 * Return new maximum or -EINVAL if the configuration space is empty
315 */
316 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
317 struct snd_pcm_hw_params *params,
318 snd_pcm_hw_param_t var, unsigned int val,
319 int *dir)
320 {
321 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
322 if (changed < 0)
323 return changed;
324 if (params->rmask) {
325 int err = snd_pcm_hw_refine(pcm, params);
326 if (err < 0)
327 return err;
328 }
329 return snd_pcm_hw_param_value_max(params, var, dir);
330 }
331
332 static int boundary_sub(int a, int adir,
333 int b, int bdir,
334 int *c, int *cdir)
335 {
336 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
337 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
338 *c = a - b;
339 *cdir = adir - bdir;
340 if (*cdir == -2) {
341 (*c)--;
342 } else if (*cdir == 2) {
343 (*c)++;
344 }
345 return 0;
346 }
347
348 static int boundary_lt(unsigned int a, int adir,
349 unsigned int b, int bdir)
350 {
351 if (adir < 0) {
352 a--;
353 adir = 1;
354 } else if (adir > 0)
355 adir = 1;
356 if (bdir < 0) {
357 b--;
358 bdir = 1;
359 } else if (bdir > 0)
360 bdir = 1;
361 return a < b || (a == b && adir < bdir);
362 }
363
364 /* Return 1 if min is nearer to best than max */
365 static int boundary_nearer(int min, int mindir,
366 int best, int bestdir,
367 int max, int maxdir)
368 {
369 int dmin, dmindir;
370 int dmax, dmaxdir;
371 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
372 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
373 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
374 }
375
376 /**
377 * snd_pcm_hw_param_near
378 * @pcm: PCM instance
379 * @params: the hw_params instance
380 * @var: parameter to retrieve
381 * @best: value to set
382 * @dir: pointer to the direction (-1,0,1) or NULL
383 *
384 * Inside configuration space defined by PARAMS set PAR to the available value
385 * nearest to VAL. Reduce configuration space accordingly.
386 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
387 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
388 * Return the value found.
389 */
390 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
391 struct snd_pcm_hw_params *params,
392 snd_pcm_hw_param_t var, unsigned int best,
393 int *dir)
394 {
395 struct snd_pcm_hw_params *save = NULL;
396 int v;
397 unsigned int saved_min;
398 int last = 0;
399 int min, max;
400 int mindir, maxdir;
401 int valdir = dir ? *dir : 0;
402 /* FIXME */
403 if (best > INT_MAX)
404 best = INT_MAX;
405 min = max = best;
406 mindir = maxdir = valdir;
407 if (maxdir > 0)
408 maxdir = 0;
409 else if (maxdir == 0)
410 maxdir = -1;
411 else {
412 maxdir = 1;
413 max--;
414 }
415 save = kmalloc(sizeof(*save), GFP_KERNEL);
416 if (save == NULL)
417 return -ENOMEM;
418 *save = *params;
419 saved_min = min;
420 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
421 if (min >= 0) {
422 struct snd_pcm_hw_params *params1;
423 if (max < 0)
424 goto _end;
425 if ((unsigned int)min == saved_min && mindir == valdir)
426 goto _end;
427 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
428 if (params1 == NULL) {
429 kfree(save);
430 return -ENOMEM;
431 }
432 *params1 = *save;
433 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
434 if (max < 0) {
435 kfree(params1);
436 goto _end;
437 }
438 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
439 *params = *params1;
440 last = 1;
441 }
442 kfree(params1);
443 } else {
444 *params = *save;
445 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
446 if (max < 0) {
447 kfree(save);
448 return max;
449 }
450 last = 1;
451 }
452 _end:
453 kfree(save);
454 if (last)
455 v = snd_pcm_hw_param_last(pcm, params, var, dir);
456 else
457 v = snd_pcm_hw_param_first(pcm, params, var, dir);
458 snd_BUG_ON(v < 0);
459 return v;
460 }
461
462 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
463 snd_pcm_hw_param_t var, unsigned int val,
464 int dir)
465 {
466 int changed;
467 if (hw_is_mask(var)) {
468 struct snd_mask *m = hw_param_mask(params, var);
469 if (val == 0 && dir < 0) {
470 changed = -EINVAL;
471 snd_mask_none(m);
472 } else {
473 if (dir > 0)
474 val++;
475 else if (dir < 0)
476 val--;
477 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
478 }
479 } else if (hw_is_interval(var)) {
480 struct snd_interval *i = hw_param_interval(params, var);
481 if (val == 0 && dir < 0) {
482 changed = -EINVAL;
483 snd_interval_none(i);
484 } else if (dir == 0)
485 changed = snd_interval_refine_set(i, val);
486 else {
487 struct snd_interval t;
488 t.openmin = 1;
489 t.openmax = 1;
490 t.empty = 0;
491 t.integer = 0;
492 if (dir < 0) {
493 t.min = val - 1;
494 t.max = val;
495 } else {
496 t.min = val;
497 t.max = val+1;
498 }
499 changed = snd_interval_refine(i, &t);
500 }
501 } else
502 return -EINVAL;
503 if (changed) {
504 params->cmask |= 1 << var;
505 params->rmask |= 1 << var;
506 }
507 return changed;
508 }
509
510 /**
511 * snd_pcm_hw_param_set
512 * @pcm: PCM instance
513 * @params: the hw_params instance
514 * @var: parameter to retrieve
515 * @val: value to set
516 * @dir: pointer to the direction (-1,0,1) or NULL
517 *
518 * Inside configuration space defined by PARAMS remove from PAR all
519 * values != VAL. Reduce configuration space accordingly.
520 * Return VAL or -EINVAL if the configuration space is empty
521 */
522 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
523 struct snd_pcm_hw_params *params,
524 snd_pcm_hw_param_t var, unsigned int val,
525 int dir)
526 {
527 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
528 if (changed < 0)
529 return changed;
530 if (params->rmask) {
531 int err = snd_pcm_hw_refine(pcm, params);
532 if (err < 0)
533 return err;
534 }
535 return snd_pcm_hw_param_value(params, var, NULL);
536 }
537
538 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
539 snd_pcm_hw_param_t var)
540 {
541 int changed;
542 changed = snd_interval_setinteger(hw_param_interval(params, var));
543 if (changed) {
544 params->cmask |= 1 << var;
545 params->rmask |= 1 << var;
546 }
547 return changed;
548 }
549
550 /*
551 * plugin
552 */
553
554 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
555 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
556 {
557 struct snd_pcm_runtime *runtime = substream->runtime;
558 struct snd_pcm_plugin *plugin, *next;
559
560 plugin = runtime->oss.plugin_first;
561 while (plugin) {
562 next = plugin->next;
563 snd_pcm_plugin_free(plugin);
564 plugin = next;
565 }
566 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
567 return 0;
568 }
569
570 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
571 {
572 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
573 plugin->next = runtime->oss.plugin_first;
574 plugin->prev = NULL;
575 if (runtime->oss.plugin_first) {
576 runtime->oss.plugin_first->prev = plugin;
577 runtime->oss.plugin_first = plugin;
578 } else {
579 runtime->oss.plugin_last =
580 runtime->oss.plugin_first = plugin;
581 }
582 return 0;
583 }
584
585 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
586 {
587 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
588 plugin->next = NULL;
589 plugin->prev = runtime->oss.plugin_last;
590 if (runtime->oss.plugin_last) {
591 runtime->oss.plugin_last->next = plugin;
592 runtime->oss.plugin_last = plugin;
593 } else {
594 runtime->oss.plugin_last =
595 runtime->oss.plugin_first = plugin;
596 }
597 return 0;
598 }
599 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
600
601 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
602 {
603 struct snd_pcm_runtime *runtime = substream->runtime;
604 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
605 long bytes = frames_to_bytes(runtime, frames);
606 if (buffer_size == runtime->oss.buffer_bytes)
607 return bytes;
608 #if BITS_PER_LONG >= 64
609 return runtime->oss.buffer_bytes * bytes / buffer_size;
610 #else
611 {
612 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
613 return div_u64(bsize, buffer_size);
614 }
615 #endif
616 }
617
618 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
619 {
620 struct snd_pcm_runtime *runtime = substream->runtime;
621 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
622 if (buffer_size == runtime->oss.buffer_bytes)
623 return bytes_to_frames(runtime, bytes);
624 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
625 }
626
627 static inline
628 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
629 {
630 return runtime->hw_ptr_interrupt;
631 }
632
633 /* define extended formats in the recent OSS versions (if any) */
634 /* linear formats */
635 #define AFMT_S32_LE 0x00001000
636 #define AFMT_S32_BE 0x00002000
637 #define AFMT_S24_LE 0x00008000
638 #define AFMT_S24_BE 0x00010000
639 #define AFMT_S24_PACKED 0x00040000
640
641 /* other supported formats */
642 #define AFMT_FLOAT 0x00004000
643 #define AFMT_SPDIF_RAW 0x00020000
644
645 /* unsupported formats */
646 #define AFMT_AC3 0x00000400
647 #define AFMT_VORBIS 0x00000800
648
649 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
650 {
651 switch (format) {
652 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
653 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
654 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
655 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
656 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
657 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
658 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
659 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
660 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
661 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
662 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
663 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
664 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
665 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
666 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
667 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
668 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
669 default: return SNDRV_PCM_FORMAT_U8;
670 }
671 }
672
673 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
674 {
675 switch (format) {
676 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
677 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
678 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
679 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
680 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
681 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
682 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
683 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
684 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
685 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
686 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
687 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
688 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
689 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
690 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
691 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
692 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
693 default: return -EINVAL;
694 }
695 }
696
697 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
698 struct snd_pcm_hw_params *oss_params,
699 struct snd_pcm_hw_params *slave_params)
700 {
701 size_t s;
702 size_t oss_buffer_size, oss_period_size, oss_periods;
703 size_t min_period_size, max_period_size;
704 struct snd_pcm_runtime *runtime = substream->runtime;
705 size_t oss_frame_size;
706
707 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
708 params_channels(oss_params) / 8;
709
710 oss_buffer_size = snd_pcm_plug_client_size(substream,
711 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
712 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
713 if (atomic_read(&substream->mmap_count)) {
714 if (oss_buffer_size > runtime->oss.mmap_bytes)
715 oss_buffer_size = runtime->oss.mmap_bytes;
716 }
717
718 if (substream->oss.setup.period_size > 16)
719 oss_period_size = substream->oss.setup.period_size;
720 else if (runtime->oss.fragshift) {
721 oss_period_size = 1 << runtime->oss.fragshift;
722 if (oss_period_size > oss_buffer_size / 2)
723 oss_period_size = oss_buffer_size / 2;
724 } else {
725 int sd;
726 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
727
728 oss_period_size = oss_buffer_size;
729 do {
730 oss_period_size /= 2;
731 } while (oss_period_size > bytes_per_sec);
732 if (runtime->oss.subdivision == 0) {
733 sd = 4;
734 if (oss_period_size / sd > 4096)
735 sd *= 2;
736 if (oss_period_size / sd < 4096)
737 sd = 1;
738 } else
739 sd = runtime->oss.subdivision;
740 oss_period_size /= sd;
741 if (oss_period_size < 16)
742 oss_period_size = 16;
743 }
744
745 min_period_size = snd_pcm_plug_client_size(substream,
746 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
747 min_period_size *= oss_frame_size;
748 min_period_size = roundup_pow_of_two(min_period_size);
749 if (oss_period_size < min_period_size)
750 oss_period_size = min_period_size;
751
752 max_period_size = snd_pcm_plug_client_size(substream,
753 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
754 max_period_size *= oss_frame_size;
755 max_period_size = rounddown_pow_of_two(max_period_size);
756 if (oss_period_size > max_period_size)
757 oss_period_size = max_period_size;
758
759 oss_periods = oss_buffer_size / oss_period_size;
760
761 if (substream->oss.setup.periods > 1)
762 oss_periods = substream->oss.setup.periods;
763
764 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
765 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
766 s = runtime->oss.maxfrags;
767 if (oss_periods > s)
768 oss_periods = s;
769
770 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
771 if (s < 2)
772 s = 2;
773 if (oss_periods < s)
774 oss_periods = s;
775
776 while (oss_period_size * oss_periods > oss_buffer_size)
777 oss_period_size /= 2;
778
779 if (oss_period_size < 16)
780 return -EINVAL;
781 runtime->oss.period_bytes = oss_period_size;
782 runtime->oss.period_frames = 1;
783 runtime->oss.periods = oss_periods;
784 return 0;
785 }
786
787 static int choose_rate(struct snd_pcm_substream *substream,
788 struct snd_pcm_hw_params *params, unsigned int best_rate)
789 {
790 const struct snd_interval *it;
791 struct snd_pcm_hw_params *save;
792 unsigned int rate, prev;
793
794 save = kmalloc(sizeof(*save), GFP_KERNEL);
795 if (save == NULL)
796 return -ENOMEM;
797 *save = *params;
798 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
799
800 /* try multiples of the best rate */
801 rate = best_rate;
802 for (;;) {
803 if (it->max < rate || (it->max == rate && it->openmax))
804 break;
805 if (it->min < rate || (it->min == rate && !it->openmin)) {
806 int ret;
807 ret = snd_pcm_hw_param_set(substream, params,
808 SNDRV_PCM_HW_PARAM_RATE,
809 rate, 0);
810 if (ret == (int)rate) {
811 kfree(save);
812 return rate;
813 }
814 *params = *save;
815 }
816 prev = rate;
817 rate += best_rate;
818 if (rate <= prev)
819 break;
820 }
821
822 /* not found, use the nearest rate */
823 kfree(save);
824 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
825 }
826
827 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
828 bool trylock)
829 {
830 struct snd_pcm_runtime *runtime = substream->runtime;
831 struct snd_pcm_hw_params *params, *sparams;
832 struct snd_pcm_sw_params *sw_params;
833 ssize_t oss_buffer_size, oss_period_size;
834 size_t oss_frame_size;
835 int err;
836 int direct;
837 snd_pcm_format_t format, sformat;
838 int n;
839 const struct snd_mask *sformat_mask;
840 struct snd_mask mask;
841
842 if (trylock) {
843 if (!(mutex_trylock(&runtime->oss.params_lock)))
844 return -EAGAIN;
845 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
846 return -EINTR;
847 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
848 params = kmalloc(sizeof(*params), GFP_KERNEL);
849 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
850 if (!sw_params || !params || !sparams) {
851 err = -ENOMEM;
852 goto failure;
853 }
854
855 if (atomic_read(&substream->mmap_count))
856 direct = 1;
857 else
858 direct = substream->oss.setup.direct;
859
860 _snd_pcm_hw_params_any(sparams);
861 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
862 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
863 snd_mask_none(&mask);
864 if (atomic_read(&substream->mmap_count))
865 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
866 else {
867 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
868 if (!direct)
869 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
870 }
871 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
872 if (err < 0) {
873 pcm_dbg(substream->pcm, "No usable accesses\n");
874 err = -EINVAL;
875 goto failure;
876 }
877 choose_rate(substream, sparams, runtime->oss.rate);
878 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
879
880 format = snd_pcm_oss_format_from(runtime->oss.format);
881
882 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
883 if (direct)
884 sformat = format;
885 else
886 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
887
888 if ((__force int)sformat < 0 ||
889 !snd_mask_test(sformat_mask, (__force int)sformat)) {
890 for (sformat = (__force snd_pcm_format_t)0;
891 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
892 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
893 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
894 snd_pcm_oss_format_to(sformat) >= 0)
895 break;
896 }
897 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
898 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
899 err = -EINVAL;
900 goto failure;
901 }
902 }
903 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
904 if (err < 0)
905 goto failure;
906
907 if (direct) {
908 memcpy(params, sparams, sizeof(*params));
909 } else {
910 _snd_pcm_hw_params_any(params);
911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
912 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
914 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
915 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
916 runtime->oss.channels, 0);
917 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
918 runtime->oss.rate, 0);
919 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
920 params_access(params), params_format(params),
921 params_channels(params), params_rate(params));
922 }
923 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
924 params_access(sparams), params_format(sparams),
925 params_channels(sparams), params_rate(sparams));
926
927 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
928 params_channels(params) / 8;
929
930 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
931 snd_pcm_oss_plugin_clear(substream);
932 if (!direct) {
933 /* add necessary plugins */
934 snd_pcm_oss_plugin_clear(substream);
935 if ((err = snd_pcm_plug_format_plugins(substream,
936 params,
937 sparams)) < 0) {
938 pcm_dbg(substream->pcm,
939 "snd_pcm_plug_format_plugins failed: %i\n", err);
940 snd_pcm_oss_plugin_clear(substream);
941 goto failure;
942 }
943 if (runtime->oss.plugin_first) {
944 struct snd_pcm_plugin *plugin;
945 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
946 pcm_dbg(substream->pcm,
947 "snd_pcm_plugin_build_io failed: %i\n", err);
948 snd_pcm_oss_plugin_clear(substream);
949 goto failure;
950 }
951 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
952 err = snd_pcm_plugin_append(plugin);
953 } else {
954 err = snd_pcm_plugin_insert(plugin);
955 }
956 if (err < 0) {
957 snd_pcm_oss_plugin_clear(substream);
958 goto failure;
959 }
960 }
961 }
962 #endif
963
964 err = snd_pcm_oss_period_size(substream, params, sparams);
965 if (err < 0)
966 goto failure;
967
968 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
969 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
970 if (err < 0)
971 goto failure;
972
973 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
974 runtime->oss.periods, NULL);
975 if (err < 0)
976 goto failure;
977
978 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
979
980 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
981 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
982 goto failure;
983 }
984
985 if (runtime->oss.trigger) {
986 sw_params->start_threshold = 1;
987 } else {
988 sw_params->start_threshold = runtime->boundary;
989 }
990 if (atomic_read(&substream->mmap_count) ||
991 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
992 sw_params->stop_threshold = runtime->boundary;
993 else
994 sw_params->stop_threshold = runtime->buffer_size;
995 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
996 sw_params->period_step = 1;
997 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
998 1 : runtime->period_size;
999 if (atomic_read(&substream->mmap_count) ||
1000 substream->oss.setup.nosilence) {
1001 sw_params->silence_threshold = 0;
1002 sw_params->silence_size = 0;
1003 } else {
1004 snd_pcm_uframes_t frames;
1005 frames = runtime->period_size + 16;
1006 if (frames > runtime->buffer_size)
1007 frames = runtime->buffer_size;
1008 sw_params->silence_threshold = frames;
1009 sw_params->silence_size = frames;
1010 }
1011
1012 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1013 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1014 goto failure;
1015 }
1016
1017 runtime->oss.periods = params_periods(sparams);
1018 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1019 if (oss_period_size < 0) {
1020 err = -EINVAL;
1021 goto failure;
1022 }
1023 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1024 if (runtime->oss.plugin_first) {
1025 err = snd_pcm_plug_alloc(substream, oss_period_size);
1026 if (err < 0)
1027 goto failure;
1028 }
1029 #endif
1030 oss_period_size *= oss_frame_size;
1031
1032 oss_buffer_size = oss_period_size * runtime->oss.periods;
1033 if (oss_buffer_size < 0) {
1034 err = -EINVAL;
1035 goto failure;
1036 }
1037
1038 runtime->oss.period_bytes = oss_period_size;
1039 runtime->oss.buffer_bytes = oss_buffer_size;
1040
1041 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1042 runtime->oss.period_bytes,
1043 runtime->oss.buffer_bytes);
1044 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1045 params_period_size(sparams),
1046 params_buffer_size(sparams));
1047
1048 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1049 runtime->oss.channels = params_channels(params);
1050 runtime->oss.rate = params_rate(params);
1051
1052 vfree(runtime->oss.buffer);
1053 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1054 if (!runtime->oss.buffer) {
1055 err = -ENOMEM;
1056 goto failure;
1057 }
1058
1059 runtime->oss.params = 0;
1060 runtime->oss.prepare = 1;
1061 runtime->oss.buffer_used = 0;
1062 if (runtime->dma_area)
1063 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1064
1065 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1066
1067 err = 0;
1068 failure:
1069 kfree(sw_params);
1070 kfree(params);
1071 kfree(sparams);
1072 mutex_unlock(&runtime->oss.params_lock);
1073 return err;
1074 }
1075
1076 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1077 {
1078 int idx, err;
1079 struct snd_pcm_substream *asubstream = NULL, *substream;
1080
1081 for (idx = 0; idx < 2; idx++) {
1082 substream = pcm_oss_file->streams[idx];
1083 if (substream == NULL)
1084 continue;
1085 if (asubstream == NULL)
1086 asubstream = substream;
1087 if (substream->runtime->oss.params) {
1088 err = snd_pcm_oss_change_params(substream, false);
1089 if (err < 0)
1090 return err;
1091 }
1092 }
1093 if (!asubstream)
1094 return -EIO;
1095 if (r_substream)
1096 *r_substream = asubstream;
1097 return 0;
1098 }
1099
1100 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1101 {
1102 int err;
1103 struct snd_pcm_runtime *runtime = substream->runtime;
1104
1105 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1106 if (err < 0) {
1107 pcm_dbg(substream->pcm,
1108 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1109 return err;
1110 }
1111 runtime->oss.prepare = 0;
1112 runtime->oss.prev_hw_ptr_period = 0;
1113 runtime->oss.period_ptr = 0;
1114 runtime->oss.buffer_used = 0;
1115
1116 return 0;
1117 }
1118
1119 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1120 {
1121 struct snd_pcm_runtime *runtime;
1122 int err;
1123
1124 if (substream == NULL)
1125 return 0;
1126 runtime = substream->runtime;
1127 if (runtime->oss.params) {
1128 err = snd_pcm_oss_change_params(substream, false);
1129 if (err < 0)
1130 return err;
1131 }
1132 if (runtime->oss.prepare) {
1133 err = snd_pcm_oss_prepare(substream);
1134 if (err < 0)
1135 return err;
1136 }
1137 return 0;
1138 }
1139
1140 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1141 {
1142 struct snd_pcm_runtime *runtime;
1143 snd_pcm_uframes_t frames;
1144 int err = 0;
1145
1146 while (1) {
1147 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1148 if (err < 0)
1149 break;
1150 runtime = substream->runtime;
1151 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1152 break;
1153 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1154 /* until avail(delay) <= buffer_size */
1155 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1156 frames /= runtime->period_size;
1157 frames *= runtime->period_size;
1158 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1159 if (err < 0)
1160 break;
1161 }
1162 return err;
1163 }
1164
1165 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1166 {
1167 struct snd_pcm_runtime *runtime = substream->runtime;
1168 int ret;
1169 while (1) {
1170 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1171 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1172 #ifdef OSS_DEBUG
1173 pcm_dbg(substream->pcm,
1174 "pcm_oss: write: recovering from %s\n",
1175 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1176 "XRUN" : "SUSPEND");
1177 #endif
1178 ret = snd_pcm_oss_prepare(substream);
1179 if (ret < 0)
1180 break;
1181 }
1182 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1183 frames, in_kernel);
1184 if (ret != -EPIPE && ret != -ESTRPIPE)
1185 break;
1186 /* test, if we can't store new data, because the stream */
1187 /* has not been started */
1188 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1189 return -EAGAIN;
1190 }
1191 return ret;
1192 }
1193
1194 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1195 {
1196 struct snd_pcm_runtime *runtime = substream->runtime;
1197 snd_pcm_sframes_t delay;
1198 int ret;
1199 while (1) {
1200 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1201 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1202 #ifdef OSS_DEBUG
1203 pcm_dbg(substream->pcm,
1204 "pcm_oss: read: recovering from %s\n",
1205 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1206 "XRUN" : "SUSPEND");
1207 #endif
1208 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1209 if (ret < 0)
1210 break;
1211 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1212 ret = snd_pcm_oss_prepare(substream);
1213 if (ret < 0)
1214 break;
1215 }
1216 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1217 if (ret < 0)
1218 break;
1219 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1220 frames, in_kernel);
1221 if (ret == -EPIPE) {
1222 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1223 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1224 if (ret < 0)
1225 break;
1226 }
1227 continue;
1228 }
1229 if (ret != -ESTRPIPE)
1230 break;
1231 }
1232 return ret;
1233 }
1234
1235 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1236 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1237 {
1238 struct snd_pcm_runtime *runtime = substream->runtime;
1239 int ret;
1240 while (1) {
1241 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1242 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1243 #ifdef OSS_DEBUG
1244 pcm_dbg(substream->pcm,
1245 "pcm_oss: writev: recovering from %s\n",
1246 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1247 "XRUN" : "SUSPEND");
1248 #endif
1249 ret = snd_pcm_oss_prepare(substream);
1250 if (ret < 0)
1251 break;
1252 }
1253 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1254 if (ret != -EPIPE && ret != -ESTRPIPE)
1255 break;
1256
1257 /* test, if we can't store new data, because the stream */
1258 /* has not been started */
1259 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1260 return -EAGAIN;
1261 }
1262 return ret;
1263 }
1264
1265 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1266 {
1267 struct snd_pcm_runtime *runtime = substream->runtime;
1268 int ret;
1269 while (1) {
1270 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1271 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1272 #ifdef OSS_DEBUG
1273 pcm_dbg(substream->pcm,
1274 "pcm_oss: readv: recovering from %s\n",
1275 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1276 "XRUN" : "SUSPEND");
1277 #endif
1278 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1279 if (ret < 0)
1280 break;
1281 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1282 ret = snd_pcm_oss_prepare(substream);
1283 if (ret < 0)
1284 break;
1285 }
1286 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1287 if (ret != -EPIPE && ret != -ESTRPIPE)
1288 break;
1289 }
1290 return ret;
1291 }
1292 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1293
1294 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1295 {
1296 struct snd_pcm_runtime *runtime = substream->runtime;
1297 snd_pcm_sframes_t frames, frames1;
1298 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1299 if (runtime->oss.plugin_first) {
1300 struct snd_pcm_plugin_channel *channels;
1301 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1302 if (!in_kernel) {
1303 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1304 return -EFAULT;
1305 buf = runtime->oss.buffer;
1306 }
1307 frames = bytes / oss_frame_bytes;
1308 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1309 if (frames1 < 0)
1310 return frames1;
1311 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1312 if (frames1 <= 0)
1313 return frames1;
1314 bytes = frames1 * oss_frame_bytes;
1315 } else
1316 #endif
1317 {
1318 frames = bytes_to_frames(runtime, bytes);
1319 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1320 if (frames1 <= 0)
1321 return frames1;
1322 bytes = frames_to_bytes(runtime, frames1);
1323 }
1324 return bytes;
1325 }
1326
1327 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1328 {
1329 size_t xfer = 0;
1330 ssize_t tmp;
1331 struct snd_pcm_runtime *runtime = substream->runtime;
1332
1333 if (atomic_read(&substream->mmap_count))
1334 return -ENXIO;
1335
1336 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1337 return tmp;
1338 mutex_lock(&runtime->oss.params_lock);
1339 while (bytes > 0) {
1340 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1341 tmp = bytes;
1342 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1343 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1344 if (tmp > 0) {
1345 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1346 tmp = -EFAULT;
1347 goto err;
1348 }
1349 }
1350 runtime->oss.buffer_used += tmp;
1351 buf += tmp;
1352 bytes -= tmp;
1353 xfer += tmp;
1354 if (substream->oss.setup.partialfrag ||
1355 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1356 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1357 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1358 if (tmp <= 0)
1359 goto err;
1360 runtime->oss.bytes += tmp;
1361 runtime->oss.period_ptr += tmp;
1362 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1363 if (runtime->oss.period_ptr == 0 ||
1364 runtime->oss.period_ptr == runtime->oss.buffer_used)
1365 runtime->oss.buffer_used = 0;
1366 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1367 tmp = -EAGAIN;
1368 goto err;
1369 }
1370 }
1371 } else {
1372 tmp = snd_pcm_oss_write2(substream,
1373 (const char __force *)buf,
1374 runtime->oss.period_bytes, 0);
1375 if (tmp <= 0)
1376 goto err;
1377 runtime->oss.bytes += tmp;
1378 buf += tmp;
1379 bytes -= tmp;
1380 xfer += tmp;
1381 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1382 tmp != runtime->oss.period_bytes)
1383 break;
1384 }
1385 }
1386 mutex_unlock(&runtime->oss.params_lock);
1387 return xfer;
1388
1389 err:
1390 mutex_unlock(&runtime->oss.params_lock);
1391 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1392 }
1393
1394 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1395 {
1396 struct snd_pcm_runtime *runtime = substream->runtime;
1397 snd_pcm_sframes_t frames, frames1;
1398 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1399 char __user *final_dst = (char __force __user *)buf;
1400 if (runtime->oss.plugin_first) {
1401 struct snd_pcm_plugin_channel *channels;
1402 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1403 if (!in_kernel)
1404 buf = runtime->oss.buffer;
1405 frames = bytes / oss_frame_bytes;
1406 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1407 if (frames1 < 0)
1408 return frames1;
1409 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1410 if (frames1 <= 0)
1411 return frames1;
1412 bytes = frames1 * oss_frame_bytes;
1413 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1414 return -EFAULT;
1415 } else
1416 #endif
1417 {
1418 frames = bytes_to_frames(runtime, bytes);
1419 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1420 if (frames1 <= 0)
1421 return frames1;
1422 bytes = frames_to_bytes(runtime, frames1);
1423 }
1424 return bytes;
1425 }
1426
1427 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1428 {
1429 size_t xfer = 0;
1430 ssize_t tmp;
1431 struct snd_pcm_runtime *runtime = substream->runtime;
1432
1433 if (atomic_read(&substream->mmap_count))
1434 return -ENXIO;
1435
1436 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1437 return tmp;
1438 mutex_lock(&runtime->oss.params_lock);
1439 while (bytes > 0) {
1440 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1441 if (runtime->oss.buffer_used == 0) {
1442 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1443 if (tmp <= 0)
1444 goto err;
1445 runtime->oss.bytes += tmp;
1446 runtime->oss.period_ptr = tmp;
1447 runtime->oss.buffer_used = tmp;
1448 }
1449 tmp = bytes;
1450 if ((size_t) tmp > runtime->oss.buffer_used)
1451 tmp = runtime->oss.buffer_used;
1452 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1453 tmp = -EFAULT;
1454 goto err;
1455 }
1456 buf += tmp;
1457 bytes -= tmp;
1458 xfer += tmp;
1459 runtime->oss.buffer_used -= tmp;
1460 } else {
1461 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1462 runtime->oss.period_bytes, 0);
1463 if (tmp <= 0)
1464 goto err;
1465 runtime->oss.bytes += tmp;
1466 buf += tmp;
1467 bytes -= tmp;
1468 xfer += tmp;
1469 }
1470 }
1471 mutex_unlock(&runtime->oss.params_lock);
1472 return xfer;
1473
1474 err:
1475 mutex_unlock(&runtime->oss.params_lock);
1476 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1477 }
1478
1479 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1480 {
1481 struct snd_pcm_substream *substream;
1482 struct snd_pcm_runtime *runtime;
1483 int i;
1484
1485 for (i = 0; i < 2; i++) {
1486 substream = pcm_oss_file->streams[i];
1487 if (!substream)
1488 continue;
1489 runtime = substream->runtime;
1490 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1491 runtime->oss.prepare = 1;
1492 runtime->oss.buffer_used = 0;
1493 runtime->oss.prev_hw_ptr_period = 0;
1494 runtime->oss.period_ptr = 0;
1495 }
1496 return 0;
1497 }
1498
1499 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1500 {
1501 struct snd_pcm_substream *substream;
1502 int err;
1503
1504 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1505 if (substream != NULL) {
1506 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1507 return err;
1508 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1509 }
1510 /* note: all errors from the start action are ignored */
1511 /* OSS apps do not know, how to handle them */
1512 return 0;
1513 }
1514
1515 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1516 {
1517 struct snd_pcm_runtime *runtime;
1518 ssize_t result = 0;
1519 snd_pcm_state_t state;
1520 long res;
1521 wait_queue_entry_t wait;
1522
1523 runtime = substream->runtime;
1524 init_waitqueue_entry(&wait, current);
1525 add_wait_queue(&runtime->sleep, &wait);
1526 #ifdef OSS_DEBUG
1527 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1528 #endif
1529 while (1) {
1530 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1531 if (result > 0) {
1532 runtime->oss.buffer_used = 0;
1533 result = 0;
1534 break;
1535 }
1536 if (result != 0 && result != -EAGAIN)
1537 break;
1538 result = 0;
1539 set_current_state(TASK_INTERRUPTIBLE);
1540 snd_pcm_stream_lock_irq(substream);
1541 state = runtime->status->state;
1542 snd_pcm_stream_unlock_irq(substream);
1543 if (state != SNDRV_PCM_STATE_RUNNING) {
1544 set_current_state(TASK_RUNNING);
1545 break;
1546 }
1547 res = schedule_timeout(10 * HZ);
1548 if (signal_pending(current)) {
1549 result = -ERESTARTSYS;
1550 break;
1551 }
1552 if (res == 0) {
1553 pcm_err(substream->pcm,
1554 "OSS sync error - DMA timeout\n");
1555 result = -EIO;
1556 break;
1557 }
1558 }
1559 remove_wait_queue(&runtime->sleep, &wait);
1560 return result;
1561 }
1562
1563 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1564 {
1565 int err = 0;
1566 unsigned int saved_f_flags;
1567 struct snd_pcm_substream *substream;
1568 struct snd_pcm_runtime *runtime;
1569 snd_pcm_format_t format;
1570 unsigned long width;
1571 size_t size;
1572
1573 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1574 if (substream != NULL) {
1575 runtime = substream->runtime;
1576 if (atomic_read(&substream->mmap_count))
1577 goto __direct;
1578 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1579 return err;
1580 format = snd_pcm_oss_format_from(runtime->oss.format);
1581 width = snd_pcm_format_physical_width(format);
1582 mutex_lock(&runtime->oss.params_lock);
1583 if (runtime->oss.buffer_used > 0) {
1584 #ifdef OSS_DEBUG
1585 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1586 #endif
1587 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1588 snd_pcm_format_set_silence(format,
1589 runtime->oss.buffer + runtime->oss.buffer_used,
1590 size);
1591 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1592 if (err < 0) {
1593 mutex_unlock(&runtime->oss.params_lock);
1594 return err;
1595 }
1596 } else if (runtime->oss.period_ptr > 0) {
1597 #ifdef OSS_DEBUG
1598 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1599 #endif
1600 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1601 snd_pcm_format_set_silence(format,
1602 runtime->oss.buffer,
1603 size * 8 / width);
1604 err = snd_pcm_oss_sync1(substream, size);
1605 if (err < 0) {
1606 mutex_unlock(&runtime->oss.params_lock);
1607 return err;
1608 }
1609 }
1610 /*
1611 * The ALSA's period might be a bit large than OSS one.
1612 * Fill the remain portion of ALSA period with zeros.
1613 */
1614 size = runtime->control->appl_ptr % runtime->period_size;
1615 if (size > 0) {
1616 size = runtime->period_size - size;
1617 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1618 snd_pcm_lib_write(substream, NULL, size);
1619 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1620 snd_pcm_lib_writev(substream, NULL, size);
1621 }
1622 mutex_unlock(&runtime->oss.params_lock);
1623 /*
1624 * finish sync: drain the buffer
1625 */
1626 __direct:
1627 saved_f_flags = substream->f_flags;
1628 substream->f_flags &= ~O_NONBLOCK;
1629 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1630 substream->f_flags = saved_f_flags;
1631 if (err < 0)
1632 return err;
1633 runtime->oss.prepare = 1;
1634 }
1635
1636 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1637 if (substream != NULL) {
1638 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1639 return err;
1640 runtime = substream->runtime;
1641 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1642 if (err < 0)
1643 return err;
1644 runtime->oss.buffer_used = 0;
1645 runtime->oss.prepare = 1;
1646 }
1647 return 0;
1648 }
1649
1650 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1651 {
1652 int idx;
1653
1654 for (idx = 1; idx >= 0; --idx) {
1655 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1656 struct snd_pcm_runtime *runtime;
1657 if (substream == NULL)
1658 continue;
1659 runtime = substream->runtime;
1660 if (rate < 1000)
1661 rate = 1000;
1662 else if (rate > 192000)
1663 rate = 192000;
1664 if (runtime->oss.rate != rate) {
1665 runtime->oss.params = 1;
1666 runtime->oss.rate = rate;
1667 }
1668 }
1669 return snd_pcm_oss_get_rate(pcm_oss_file);
1670 }
1671
1672 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1673 {
1674 struct snd_pcm_substream *substream;
1675 int err;
1676
1677 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1678 return err;
1679 return substream->runtime->oss.rate;
1680 }
1681
1682 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1683 {
1684 int idx;
1685 if (channels < 1)
1686 channels = 1;
1687 if (channels > 128)
1688 return -EINVAL;
1689 for (idx = 1; idx >= 0; --idx) {
1690 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1691 struct snd_pcm_runtime *runtime;
1692 if (substream == NULL)
1693 continue;
1694 runtime = substream->runtime;
1695 if (runtime->oss.channels != channels) {
1696 runtime->oss.params = 1;
1697 runtime->oss.channels = channels;
1698 }
1699 }
1700 return snd_pcm_oss_get_channels(pcm_oss_file);
1701 }
1702
1703 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1704 {
1705 struct snd_pcm_substream *substream;
1706 int err;
1707
1708 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1709 return err;
1710 return substream->runtime->oss.channels;
1711 }
1712
1713 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1714 {
1715 struct snd_pcm_substream *substream;
1716 int err;
1717
1718 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1719 return err;
1720 return substream->runtime->oss.period_bytes;
1721 }
1722
1723 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1724 {
1725 struct snd_pcm_substream *substream;
1726 int err;
1727 int direct;
1728 struct snd_pcm_hw_params *params;
1729 unsigned int formats = 0;
1730 const struct snd_mask *format_mask;
1731 int fmt;
1732
1733 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1734 return err;
1735 if (atomic_read(&substream->mmap_count))
1736 direct = 1;
1737 else
1738 direct = substream->oss.setup.direct;
1739 if (!direct)
1740 return AFMT_MU_LAW | AFMT_U8 |
1741 AFMT_S16_LE | AFMT_S16_BE |
1742 AFMT_S8 | AFMT_U16_LE |
1743 AFMT_U16_BE |
1744 AFMT_S32_LE | AFMT_S32_BE |
1745 AFMT_S24_LE | AFMT_S24_BE |
1746 AFMT_S24_PACKED;
1747 params = kmalloc(sizeof(*params), GFP_KERNEL);
1748 if (!params)
1749 return -ENOMEM;
1750 _snd_pcm_hw_params_any(params);
1751 err = snd_pcm_hw_refine(substream, params);
1752 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1753 kfree(params);
1754 if (err < 0)
1755 return err;
1756 for (fmt = 0; fmt < 32; ++fmt) {
1757 if (snd_mask_test(format_mask, fmt)) {
1758 int f = snd_pcm_oss_format_to(fmt);
1759 if (f >= 0)
1760 formats |= f;
1761 }
1762 }
1763 return formats;
1764 }
1765
1766 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1767 {
1768 int formats, idx;
1769
1770 if (format != AFMT_QUERY) {
1771 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1772 if (formats < 0)
1773 return formats;
1774 if (!(formats & format))
1775 format = AFMT_U8;
1776 for (idx = 1; idx >= 0; --idx) {
1777 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1778 struct snd_pcm_runtime *runtime;
1779 if (substream == NULL)
1780 continue;
1781 runtime = substream->runtime;
1782 if (runtime->oss.format != format) {
1783 runtime->oss.params = 1;
1784 runtime->oss.format = format;
1785 }
1786 }
1787 }
1788 return snd_pcm_oss_get_format(pcm_oss_file);
1789 }
1790
1791 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1792 {
1793 struct snd_pcm_substream *substream;
1794 int err;
1795
1796 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1797 return err;
1798 return substream->runtime->oss.format;
1799 }
1800
1801 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1802 {
1803 struct snd_pcm_runtime *runtime;
1804
1805 if (substream == NULL)
1806 return 0;
1807 runtime = substream->runtime;
1808 if (subdivide == 0) {
1809 subdivide = runtime->oss.subdivision;
1810 if (subdivide == 0)
1811 subdivide = 1;
1812 return subdivide;
1813 }
1814 if (runtime->oss.subdivision || runtime->oss.fragshift)
1815 return -EINVAL;
1816 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1817 subdivide != 8 && subdivide != 16)
1818 return -EINVAL;
1819 runtime->oss.subdivision = subdivide;
1820 runtime->oss.params = 1;
1821 return subdivide;
1822 }
1823
1824 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1825 {
1826 int err = -EINVAL, idx;
1827
1828 for (idx = 1; idx >= 0; --idx) {
1829 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1830 if (substream == NULL)
1831 continue;
1832 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1833 return err;
1834 }
1835 return err;
1836 }
1837
1838 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1839 {
1840 struct snd_pcm_runtime *runtime;
1841
1842 if (substream == NULL)
1843 return 0;
1844 runtime = substream->runtime;
1845 if (runtime->oss.subdivision || runtime->oss.fragshift)
1846 return -EINVAL;
1847 runtime->oss.fragshift = val & 0xffff;
1848 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1849 if (runtime->oss.fragshift < 4) /* < 16 */
1850 runtime->oss.fragshift = 4;
1851 if (runtime->oss.maxfrags < 2)
1852 runtime->oss.maxfrags = 2;
1853 runtime->oss.params = 1;
1854 return 0;
1855 }
1856
1857 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1858 {
1859 int err = -EINVAL, idx;
1860
1861 for (idx = 1; idx >= 0; --idx) {
1862 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1863 if (substream == NULL)
1864 continue;
1865 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1866 return err;
1867 }
1868 return err;
1869 }
1870
1871 static int snd_pcm_oss_nonblock(struct file * file)
1872 {
1873 spin_lock(&file->f_lock);
1874 file->f_flags |= O_NONBLOCK;
1875 spin_unlock(&file->f_lock);
1876 return 0;
1877 }
1878
1879 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1880 {
1881
1882 if (substream == NULL) {
1883 res &= ~DSP_CAP_DUPLEX;
1884 return res;
1885 }
1886 #ifdef DSP_CAP_MULTI
1887 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1888 if (substream->pstr->substream_count > 1)
1889 res |= DSP_CAP_MULTI;
1890 #endif
1891 /* DSP_CAP_REALTIME is set all times: */
1892 /* all ALSA drivers can return actual pointer in ring buffer */
1893 #if defined(DSP_CAP_REALTIME) && 0
1894 {
1895 struct snd_pcm_runtime *runtime = substream->runtime;
1896 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1897 res &= ~DSP_CAP_REALTIME;
1898 }
1899 #endif
1900 return res;
1901 }
1902
1903 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1904 {
1905 int result, idx;
1906
1907 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1908 for (idx = 0; idx < 2; idx++) {
1909 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1910 result = snd_pcm_oss_get_caps1(substream, result);
1911 }
1912 result |= 0x0001; /* revision - same as SB AWE 64 */
1913 return result;
1914 }
1915
1916 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1917 snd_pcm_uframes_t hw_ptr)
1918 {
1919 struct snd_pcm_runtime *runtime = substream->runtime;
1920 snd_pcm_uframes_t appl_ptr;
1921 appl_ptr = hw_ptr + runtime->buffer_size;
1922 appl_ptr %= runtime->boundary;
1923 runtime->control->appl_ptr = appl_ptr;
1924 }
1925
1926 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1927 {
1928 struct snd_pcm_runtime *runtime;
1929 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1930 int err, cmd;
1931
1932 #ifdef OSS_DEBUG
1933 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1934 #endif
1935
1936 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1937 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1938
1939 if (psubstream) {
1940 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1941 return err;
1942 }
1943 if (csubstream) {
1944 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1945 return err;
1946 }
1947 if (psubstream) {
1948 runtime = psubstream->runtime;
1949 if (trigger & PCM_ENABLE_OUTPUT) {
1950 if (runtime->oss.trigger)
1951 goto _skip1;
1952 if (atomic_read(&psubstream->mmap_count))
1953 snd_pcm_oss_simulate_fill(psubstream,
1954 get_hw_ptr_period(runtime));
1955 runtime->oss.trigger = 1;
1956 runtime->start_threshold = 1;
1957 cmd = SNDRV_PCM_IOCTL_START;
1958 } else {
1959 if (!runtime->oss.trigger)
1960 goto _skip1;
1961 runtime->oss.trigger = 0;
1962 runtime->start_threshold = runtime->boundary;
1963 cmd = SNDRV_PCM_IOCTL_DROP;
1964 runtime->oss.prepare = 1;
1965 }
1966 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1967 if (err < 0)
1968 return err;
1969 }
1970 _skip1:
1971 if (csubstream) {
1972 runtime = csubstream->runtime;
1973 if (trigger & PCM_ENABLE_INPUT) {
1974 if (runtime->oss.trigger)
1975 goto _skip2;
1976 runtime->oss.trigger = 1;
1977 runtime->start_threshold = 1;
1978 cmd = SNDRV_PCM_IOCTL_START;
1979 } else {
1980 if (!runtime->oss.trigger)
1981 goto _skip2;
1982 runtime->oss.trigger = 0;
1983 runtime->start_threshold = runtime->boundary;
1984 cmd = SNDRV_PCM_IOCTL_DROP;
1985 runtime->oss.prepare = 1;
1986 }
1987 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1988 if (err < 0)
1989 return err;
1990 }
1991 _skip2:
1992 return 0;
1993 }
1994
1995 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1996 {
1997 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1998 int result = 0;
1999
2000 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2001 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2002 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2003 result |= PCM_ENABLE_OUTPUT;
2004 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2005 result |= PCM_ENABLE_INPUT;
2006 return result;
2007 }
2008
2009 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2010 {
2011 struct snd_pcm_substream *substream;
2012 struct snd_pcm_runtime *runtime;
2013 snd_pcm_sframes_t delay;
2014 int err;
2015
2016 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2017 if (substream == NULL)
2018 return -EINVAL;
2019 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2020 return err;
2021 runtime = substream->runtime;
2022 if (runtime->oss.params || runtime->oss.prepare)
2023 return 0;
2024 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2025 if (err == -EPIPE)
2026 delay = 0; /* hack for broken OSS applications */
2027 else if (err < 0)
2028 return err;
2029 return snd_pcm_oss_bytes(substream, delay);
2030 }
2031
2032 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2033 {
2034 struct snd_pcm_substream *substream;
2035 struct snd_pcm_runtime *runtime;
2036 snd_pcm_sframes_t delay;
2037 int fixup;
2038 struct count_info info;
2039 int err;
2040
2041 if (_info == NULL)
2042 return -EFAULT;
2043 substream = pcm_oss_file->streams[stream];
2044 if (substream == NULL)
2045 return -EINVAL;
2046 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2047 return err;
2048 runtime = substream->runtime;
2049 if (runtime->oss.params || runtime->oss.prepare) {
2050 memset(&info, 0, sizeof(info));
2051 if (copy_to_user(_info, &info, sizeof(info)))
2052 return -EFAULT;
2053 return 0;
2054 }
2055 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2056 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2057 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2058 err = 0;
2059 delay = 0;
2060 fixup = 0;
2061 } else {
2062 fixup = runtime->oss.buffer_used;
2063 }
2064 } else {
2065 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2066 fixup = -runtime->oss.buffer_used;
2067 }
2068 if (err < 0)
2069 return err;
2070 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2071 if (atomic_read(&substream->mmap_count)) {
2072 snd_pcm_sframes_t n;
2073 delay = get_hw_ptr_period(runtime);
2074 n = delay - runtime->oss.prev_hw_ptr_period;
2075 if (n < 0)
2076 n += runtime->boundary;
2077 info.blocks = n / runtime->period_size;
2078 runtime->oss.prev_hw_ptr_period = delay;
2079 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2080 snd_pcm_oss_simulate_fill(substream, delay);
2081 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2082 } else {
2083 delay = snd_pcm_oss_bytes(substream, delay);
2084 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2085 if (substream->oss.setup.buggyptr)
2086 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2087 else
2088 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2089 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2090 } else {
2091 delay += fixup;
2092 info.blocks = delay / runtime->oss.period_bytes;
2093 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2094 }
2095 }
2096 if (copy_to_user(_info, &info, sizeof(info)))
2097 return -EFAULT;
2098 return 0;
2099 }
2100
2101 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2102 {
2103 struct snd_pcm_substream *substream;
2104 struct snd_pcm_runtime *runtime;
2105 snd_pcm_sframes_t avail;
2106 int fixup;
2107 struct audio_buf_info info;
2108 int err;
2109
2110 if (_info == NULL)
2111 return -EFAULT;
2112 substream = pcm_oss_file->streams[stream];
2113 if (substream == NULL)
2114 return -EINVAL;
2115 runtime = substream->runtime;
2116
2117 if (runtime->oss.params &&
2118 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2119 return err;
2120
2121 info.fragsize = runtime->oss.period_bytes;
2122 info.fragstotal = runtime->periods;
2123 if (runtime->oss.prepare) {
2124 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2125 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2126 info.fragments = runtime->oss.periods;
2127 } else {
2128 info.bytes = 0;
2129 info.fragments = 0;
2130 }
2131 } else {
2132 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2133 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2134 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2135 avail = runtime->buffer_size;
2136 err = 0;
2137 fixup = 0;
2138 } else {
2139 avail = runtime->buffer_size - avail;
2140 fixup = -runtime->oss.buffer_used;
2141 }
2142 } else {
2143 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2144 fixup = runtime->oss.buffer_used;
2145 }
2146 if (err < 0)
2147 return err;
2148 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2149 info.fragments = info.bytes / runtime->oss.period_bytes;
2150 }
2151
2152 #ifdef OSS_DEBUG
2153 pcm_dbg(substream->pcm,
2154 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2155 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2156 #endif
2157 if (copy_to_user(_info, &info, sizeof(info)))
2158 return -EFAULT;
2159 return 0;
2160 }
2161
2162 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2163 {
2164 // it won't be probably implemented
2165 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2166 return -EINVAL;
2167 }
2168
2169 static const char *strip_task_path(const char *path)
2170 {
2171 const char *ptr, *ptrl = NULL;
2172 for (ptr = path; *ptr; ptr++) {
2173 if (*ptr == '/')
2174 ptrl = ptr + 1;
2175 }
2176 return ptrl;
2177 }
2178
2179 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2180 const char *task_name,
2181 struct snd_pcm_oss_setup *rsetup)
2182 {
2183 struct snd_pcm_oss_setup *setup;
2184
2185 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2186 do {
2187 for (setup = pcm->streams[stream].oss.setup_list; setup;
2188 setup = setup->next) {
2189 if (!strcmp(setup->task_name, task_name))
2190 goto out;
2191 }
2192 } while ((task_name = strip_task_path(task_name)) != NULL);
2193 out:
2194 if (setup)
2195 *rsetup = *setup;
2196 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2197 }
2198
2199 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2200 {
2201 struct snd_pcm_runtime *runtime;
2202 runtime = substream->runtime;
2203 vfree(runtime->oss.buffer);
2204 runtime->oss.buffer = NULL;
2205 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2206 snd_pcm_oss_plugin_clear(substream);
2207 #endif
2208 substream->oss.oss = 0;
2209 }
2210
2211 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2212 struct snd_pcm_oss_setup *setup,
2213 int minor)
2214 {
2215 struct snd_pcm_runtime *runtime;
2216
2217 substream->oss.oss = 1;
2218 substream->oss.setup = *setup;
2219 if (setup->nonblock)
2220 substream->f_flags |= O_NONBLOCK;
2221 else if (setup->block)
2222 substream->f_flags &= ~O_NONBLOCK;
2223 runtime = substream->runtime;
2224 runtime->oss.params = 1;
2225 runtime->oss.trigger = 1;
2226 runtime->oss.rate = 8000;
2227 mutex_init(&runtime->oss.params_lock);
2228 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2229 case SNDRV_MINOR_OSS_PCM_8:
2230 runtime->oss.format = AFMT_U8;
2231 break;
2232 case SNDRV_MINOR_OSS_PCM_16:
2233 runtime->oss.format = AFMT_S16_LE;
2234 break;
2235 default:
2236 runtime->oss.format = AFMT_MU_LAW;
2237 }
2238 runtime->oss.channels = 1;
2239 runtime->oss.fragshift = 0;
2240 runtime->oss.maxfrags = 0;
2241 runtime->oss.subdivision = 0;
2242 substream->pcm_release = snd_pcm_oss_release_substream;
2243 }
2244
2245 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2246 {
2247 int cidx;
2248 if (!pcm_oss_file)
2249 return 0;
2250 for (cidx = 0; cidx < 2; ++cidx) {
2251 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2252 if (substream)
2253 snd_pcm_release_substream(substream);
2254 }
2255 kfree(pcm_oss_file);
2256 return 0;
2257 }
2258
2259 static int snd_pcm_oss_open_file(struct file *file,
2260 struct snd_pcm *pcm,
2261 struct snd_pcm_oss_file **rpcm_oss_file,
2262 int minor,
2263 struct snd_pcm_oss_setup *setup)
2264 {
2265 int idx, err;
2266 struct snd_pcm_oss_file *pcm_oss_file;
2267 struct snd_pcm_substream *substream;
2268 fmode_t f_mode = file->f_mode;
2269
2270 if (rpcm_oss_file)
2271 *rpcm_oss_file = NULL;
2272
2273 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2274 if (pcm_oss_file == NULL)
2275 return -ENOMEM;
2276
2277 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2278 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2279 f_mode = FMODE_WRITE;
2280
2281 file->f_flags &= ~O_APPEND;
2282 for (idx = 0; idx < 2; idx++) {
2283 if (setup[idx].disable)
2284 continue;
2285 if (! pcm->streams[idx].substream_count)
2286 continue; /* no matching substream */
2287 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2288 if (! (f_mode & FMODE_WRITE))
2289 continue;
2290 } else {
2291 if (! (f_mode & FMODE_READ))
2292 continue;
2293 }
2294 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2295 if (err < 0) {
2296 snd_pcm_oss_release_file(pcm_oss_file);
2297 return err;
2298 }
2299
2300 pcm_oss_file->streams[idx] = substream;
2301 substream->file = pcm_oss_file;
2302 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2303 }
2304
2305 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2306 snd_pcm_oss_release_file(pcm_oss_file);
2307 return -EINVAL;
2308 }
2309
2310 file->private_data = pcm_oss_file;
2311 if (rpcm_oss_file)
2312 *rpcm_oss_file = pcm_oss_file;
2313 return 0;
2314 }
2315
2316
2317 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2318 {
2319 unsigned int idx;
2320
2321 if (snd_BUG_ON(!task || !name || size < 2))
2322 return -EINVAL;
2323 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2324 name[idx] = task->comm[idx];
2325 name[idx] = '\0';
2326 return 0;
2327 }
2328
2329 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2330 {
2331 int err;
2332 char task_name[32];
2333 struct snd_pcm *pcm;
2334 struct snd_pcm_oss_file *pcm_oss_file;
2335 struct snd_pcm_oss_setup setup[2];
2336 int nonblock;
2337 wait_queue_entry_t wait;
2338
2339 err = nonseekable_open(inode, file);
2340 if (err < 0)
2341 return err;
2342
2343 pcm = snd_lookup_oss_minor_data(iminor(inode),
2344 SNDRV_OSS_DEVICE_TYPE_PCM);
2345 if (pcm == NULL) {
2346 err = -ENODEV;
2347 goto __error1;
2348 }
2349 err = snd_card_file_add(pcm->card, file);
2350 if (err < 0)
2351 goto __error1;
2352 if (!try_module_get(pcm->card->module)) {
2353 err = -EFAULT;
2354 goto __error2;
2355 }
2356 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2357 err = -EFAULT;
2358 goto __error;
2359 }
2360 memset(setup, 0, sizeof(setup));
2361 if (file->f_mode & FMODE_WRITE)
2362 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2363 task_name, &setup[0]);
2364 if (file->f_mode & FMODE_READ)
2365 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2366 task_name, &setup[1]);
2367
2368 nonblock = !!(file->f_flags & O_NONBLOCK);
2369 if (!nonblock)
2370 nonblock = nonblock_open;
2371
2372 init_waitqueue_entry(&wait, current);
2373 add_wait_queue(&pcm->open_wait, &wait);
2374 mutex_lock(&pcm->open_mutex);
2375 while (1) {
2376 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2377 iminor(inode), setup);
2378 if (err >= 0)
2379 break;
2380 if (err == -EAGAIN) {
2381 if (nonblock) {
2382 err = -EBUSY;
2383 break;
2384 }
2385 } else
2386 break;
2387 set_current_state(TASK_INTERRUPTIBLE);
2388 mutex_unlock(&pcm->open_mutex);
2389 schedule();
2390 mutex_lock(&pcm->open_mutex);
2391 if (pcm->card->shutdown) {
2392 err = -ENODEV;
2393 break;
2394 }
2395 if (signal_pending(current)) {
2396 err = -ERESTARTSYS;
2397 break;
2398 }
2399 }
2400 remove_wait_queue(&pcm->open_wait, &wait);
2401 mutex_unlock(&pcm->open_mutex);
2402 if (err < 0)
2403 goto __error;
2404 snd_card_unref(pcm->card);
2405 return err;
2406
2407 __error:
2408 module_put(pcm->card->module);
2409 __error2:
2410 snd_card_file_remove(pcm->card, file);
2411 __error1:
2412 if (pcm)
2413 snd_card_unref(pcm->card);
2414 return err;
2415 }
2416
2417 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2418 {
2419 struct snd_pcm *pcm;
2420 struct snd_pcm_substream *substream;
2421 struct snd_pcm_oss_file *pcm_oss_file;
2422
2423 pcm_oss_file = file->private_data;
2424 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2425 if (substream == NULL)
2426 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2427 if (snd_BUG_ON(!substream))
2428 return -ENXIO;
2429 pcm = substream->pcm;
2430 if (!pcm->card->shutdown)
2431 snd_pcm_oss_sync(pcm_oss_file);
2432 mutex_lock(&pcm->open_mutex);
2433 snd_pcm_oss_release_file(pcm_oss_file);
2434 mutex_unlock(&pcm->open_mutex);
2435 wake_up(&pcm->open_wait);
2436 module_put(pcm->card->module);
2437 snd_card_file_remove(pcm->card, file);
2438 return 0;
2439 }
2440
2441 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2442 {
2443 struct snd_pcm_oss_file *pcm_oss_file;
2444 int __user *p = (int __user *)arg;
2445 int res;
2446
2447 pcm_oss_file = file->private_data;
2448 if (cmd == OSS_GETVERSION)
2449 return put_user(SNDRV_OSS_VERSION, p);
2450 if (cmd == OSS_ALSAEMULVER)
2451 return put_user(1, p);
2452 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2453 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2454 struct snd_pcm_substream *substream;
2455 int idx;
2456 for (idx = 0; idx < 2; ++idx) {
2457 substream = pcm_oss_file->streams[idx];
2458 if (substream != NULL)
2459 break;
2460 }
2461 if (snd_BUG_ON(idx >= 2))
2462 return -ENXIO;
2463 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2464 }
2465 #endif
2466 if (((cmd >> 8) & 0xff) != 'P')
2467 return -EINVAL;
2468 #ifdef OSS_DEBUG
2469 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2470 #endif
2471 switch (cmd) {
2472 case SNDCTL_DSP_RESET:
2473 return snd_pcm_oss_reset(pcm_oss_file);
2474 case SNDCTL_DSP_SYNC:
2475 return snd_pcm_oss_sync(pcm_oss_file);
2476 case SNDCTL_DSP_SPEED:
2477 if (get_user(res, p))
2478 return -EFAULT;
2479 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2480 return res;
2481 return put_user(res, p);
2482 case SOUND_PCM_READ_RATE:
2483 res = snd_pcm_oss_get_rate(pcm_oss_file);
2484 if (res < 0)
2485 return res;
2486 return put_user(res, p);
2487 case SNDCTL_DSP_STEREO:
2488 if (get_user(res, p))
2489 return -EFAULT;
2490 res = res > 0 ? 2 : 1;
2491 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2492 return res;
2493 return put_user(--res, p);
2494 case SNDCTL_DSP_GETBLKSIZE:
2495 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2496 if (res < 0)
2497 return res;
2498 return put_user(res, p);
2499 case SNDCTL_DSP_SETFMT:
2500 if (get_user(res, p))
2501 return -EFAULT;
2502 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2503 if (res < 0)
2504 return res;
2505 return put_user(res, p);
2506 case SOUND_PCM_READ_BITS:
2507 res = snd_pcm_oss_get_format(pcm_oss_file);
2508 if (res < 0)
2509 return res;
2510 return put_user(res, p);
2511 case SNDCTL_DSP_CHANNELS:
2512 if (get_user(res, p))
2513 return -EFAULT;
2514 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2515 if (res < 0)
2516 return res;
2517 return put_user(res, p);
2518 case SOUND_PCM_READ_CHANNELS:
2519 res = snd_pcm_oss_get_channels(pcm_oss_file);
2520 if (res < 0)
2521 return res;
2522 return put_user(res, p);
2523 case SOUND_PCM_WRITE_FILTER:
2524 case SOUND_PCM_READ_FILTER:
2525 return -EIO;
2526 case SNDCTL_DSP_POST:
2527 return snd_pcm_oss_post(pcm_oss_file);
2528 case SNDCTL_DSP_SUBDIVIDE:
2529 if (get_user(res, p))
2530 return -EFAULT;
2531 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2532 if (res < 0)
2533 return res;
2534 return put_user(res, p);
2535 case SNDCTL_DSP_SETFRAGMENT:
2536 if (get_user(res, p))
2537 return -EFAULT;
2538 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2539 case SNDCTL_DSP_GETFMTS:
2540 res = snd_pcm_oss_get_formats(pcm_oss_file);
2541 if (res < 0)
2542 return res;
2543 return put_user(res, p);
2544 case SNDCTL_DSP_GETOSPACE:
2545 case SNDCTL_DSP_GETISPACE:
2546 return snd_pcm_oss_get_space(pcm_oss_file,
2547 cmd == SNDCTL_DSP_GETISPACE ?
2548 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2549 (struct audio_buf_info __user *) arg);
2550 case SNDCTL_DSP_NONBLOCK:
2551 return snd_pcm_oss_nonblock(file);
2552 case SNDCTL_DSP_GETCAPS:
2553 res = snd_pcm_oss_get_caps(pcm_oss_file);
2554 if (res < 0)
2555 return res;
2556 return put_user(res, p);
2557 case SNDCTL_DSP_GETTRIGGER:
2558 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2559 if (res < 0)
2560 return res;
2561 return put_user(res, p);
2562 case SNDCTL_DSP_SETTRIGGER:
2563 if (get_user(res, p))
2564 return -EFAULT;
2565 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2566 case SNDCTL_DSP_GETIPTR:
2567 case SNDCTL_DSP_GETOPTR:
2568 return snd_pcm_oss_get_ptr(pcm_oss_file,
2569 cmd == SNDCTL_DSP_GETIPTR ?
2570 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2571 (struct count_info __user *) arg);
2572 case SNDCTL_DSP_MAPINBUF:
2573 case SNDCTL_DSP_MAPOUTBUF:
2574 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2575 cmd == SNDCTL_DSP_MAPINBUF ?
2576 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2577 (struct buffmem_desc __user *) arg);
2578 case SNDCTL_DSP_SETSYNCRO:
2579 /* stop DMA now.. */
2580 return 0;
2581 case SNDCTL_DSP_SETDUPLEX:
2582 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2583 return 0;
2584 return -EIO;
2585 case SNDCTL_DSP_GETODELAY:
2586 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2587 if (res < 0) {
2588 /* it's for sure, some broken apps don't check for error codes */
2589 put_user(0, p);
2590 return res;
2591 }
2592 return put_user(res, p);
2593 case SNDCTL_DSP_PROFILE:
2594 return 0; /* silently ignore */
2595 default:
2596 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2597 }
2598 return -EINVAL;
2599 }
2600
2601 #ifdef CONFIG_COMPAT
2602 /* all compatible */
2603 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2604 unsigned long arg)
2605 {
2606 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2607 }
2608 #else
2609 #define snd_pcm_oss_ioctl_compat NULL
2610 #endif
2611
2612 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2613 {
2614 struct snd_pcm_oss_file *pcm_oss_file;
2615 struct snd_pcm_substream *substream;
2616
2617 pcm_oss_file = file->private_data;
2618 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2619 if (substream == NULL)
2620 return -ENXIO;
2621 substream->f_flags = file->f_flags & O_NONBLOCK;
2622 #ifndef OSS_DEBUG
2623 return snd_pcm_oss_read1(substream, buf, count);
2624 #else
2625 {
2626 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2627 pcm_dbg(substream->pcm,
2628 "pcm_oss: read %li bytes (returned %li bytes)\n",
2629 (long)count, (long)res);
2630 return res;
2631 }
2632 #endif
2633 }
2634
2635 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2636 {
2637 struct snd_pcm_oss_file *pcm_oss_file;
2638 struct snd_pcm_substream *substream;
2639 long result;
2640
2641 pcm_oss_file = file->private_data;
2642 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2643 if (substream == NULL)
2644 return -ENXIO;
2645 substream->f_flags = file->f_flags & O_NONBLOCK;
2646 result = snd_pcm_oss_write1(substream, buf, count);
2647 #ifdef OSS_DEBUG
2648 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2649 (long)count, (long)result);
2650 #endif
2651 return result;
2652 }
2653
2654 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2655 {
2656 struct snd_pcm_runtime *runtime = substream->runtime;
2657 if (atomic_read(&substream->mmap_count))
2658 return runtime->oss.prev_hw_ptr_period !=
2659 get_hw_ptr_period(runtime);
2660 else
2661 return snd_pcm_playback_avail(runtime) >=
2662 runtime->oss.period_frames;
2663 }
2664
2665 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2666 {
2667 struct snd_pcm_runtime *runtime = substream->runtime;
2668 if (atomic_read(&substream->mmap_count))
2669 return runtime->oss.prev_hw_ptr_period !=
2670 get_hw_ptr_period(runtime);
2671 else
2672 return snd_pcm_capture_avail(runtime) >=
2673 runtime->oss.period_frames;
2674 }
2675
2676 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2677 {
2678 struct snd_pcm_oss_file *pcm_oss_file;
2679 unsigned int mask;
2680 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2681
2682 pcm_oss_file = file->private_data;
2683
2684 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2685 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2686
2687 mask = 0;
2688 if (psubstream != NULL) {
2689 struct snd_pcm_runtime *runtime = psubstream->runtime;
2690 poll_wait(file, &runtime->sleep, wait);
2691 snd_pcm_stream_lock_irq(psubstream);
2692 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2693 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2694 snd_pcm_oss_playback_ready(psubstream)))
2695 mask |= POLLOUT | POLLWRNORM;
2696 snd_pcm_stream_unlock_irq(psubstream);
2697 }
2698 if (csubstream != NULL) {
2699 struct snd_pcm_runtime *runtime = csubstream->runtime;
2700 snd_pcm_state_t ostate;
2701 poll_wait(file, &runtime->sleep, wait);
2702 snd_pcm_stream_lock_irq(csubstream);
2703 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2704 snd_pcm_oss_capture_ready(csubstream))
2705 mask |= POLLIN | POLLRDNORM;
2706 snd_pcm_stream_unlock_irq(csubstream);
2707 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2708 struct snd_pcm_oss_file ofile;
2709 memset(&ofile, 0, sizeof(ofile));
2710 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2711 runtime->oss.trigger = 0;
2712 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2713 }
2714 }
2715
2716 return mask;
2717 }
2718
2719 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2720 {
2721 struct snd_pcm_oss_file *pcm_oss_file;
2722 struct snd_pcm_substream *substream = NULL;
2723 struct snd_pcm_runtime *runtime;
2724 int err;
2725
2726 #ifdef OSS_DEBUG
2727 pr_debug("pcm_oss: mmap begin\n");
2728 #endif
2729 pcm_oss_file = file->private_data;
2730 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2731 case VM_READ | VM_WRITE:
2732 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2733 if (substream)
2734 break;
2735 /* Fall through */
2736 case VM_READ:
2737 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2738 break;
2739 case VM_WRITE:
2740 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2741 break;
2742 default:
2743 return -EINVAL;
2744 }
2745 /* set VM_READ access as well to fix memset() routines that do
2746 reads before writes (to improve performance) */
2747 area->vm_flags |= VM_READ;
2748 if (substream == NULL)
2749 return -ENXIO;
2750 runtime = substream->runtime;
2751 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2752 return -EIO;
2753 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2754 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2755 else
2756 return -EIO;
2757
2758 if (runtime->oss.params) {
2759 /* use mutex_trylock() for params_lock for avoiding a deadlock
2760 * between mmap_sem and params_lock taken by
2761 * copy_from/to_user() in snd_pcm_oss_write/read()
2762 */
2763 err = snd_pcm_oss_change_params(substream, true);
2764 if (err < 0)
2765 return err;
2766 }
2767 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2768 if (runtime->oss.plugin_first != NULL)
2769 return -EIO;
2770 #endif
2771
2772 if (area->vm_pgoff != 0)
2773 return -EINVAL;
2774
2775 err = snd_pcm_mmap_data(substream, file, area);
2776 if (err < 0)
2777 return err;
2778 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2779 runtime->silence_threshold = 0;
2780 runtime->silence_size = 0;
2781 #ifdef OSS_DEBUG
2782 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2783 runtime->oss.mmap_bytes);
2784 #endif
2785 /* In mmap mode we never stop */
2786 runtime->stop_threshold = runtime->boundary;
2787
2788 return 0;
2789 }
2790
2791 #ifdef CONFIG_SND_VERBOSE_PROCFS
2792 /*
2793 * /proc interface
2794 */
2795
2796 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2797 struct snd_info_buffer *buffer)
2798 {
2799 struct snd_pcm_str *pstr = entry->private_data;
2800 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2801 mutex_lock(&pstr->oss.setup_mutex);
2802 while (setup) {
2803 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2804 setup->task_name,
2805 setup->periods,
2806 setup->period_size,
2807 setup->disable ? " disable" : "",
2808 setup->direct ? " direct" : "",
2809 setup->block ? " block" : "",
2810 setup->nonblock ? " non-block" : "",
2811 setup->partialfrag ? " partial-frag" : "",
2812 setup->nosilence ? " no-silence" : "");
2813 setup = setup->next;
2814 }
2815 mutex_unlock(&pstr->oss.setup_mutex);
2816 }
2817
2818 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2819 {
2820 struct snd_pcm_oss_setup *setup, *setupn;
2821
2822 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2823 setup; setup = setupn) {
2824 setupn = setup->next;
2825 kfree(setup->task_name);
2826 kfree(setup);
2827 }
2828 pstr->oss.setup_list = NULL;
2829 }
2830
2831 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2832 struct snd_info_buffer *buffer)
2833 {
2834 struct snd_pcm_str *pstr = entry->private_data;
2835 char line[128], str[32], task_name[32];
2836 const char *ptr;
2837 int idx1;
2838 struct snd_pcm_oss_setup *setup, *setup1, template;
2839
2840 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2841 mutex_lock(&pstr->oss.setup_mutex);
2842 memset(&template, 0, sizeof(template));
2843 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2844 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2845 snd_pcm_oss_proc_free_setup_list(pstr);
2846 mutex_unlock(&pstr->oss.setup_mutex);
2847 continue;
2848 }
2849 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2850 if (!strcmp(setup->task_name, task_name)) {
2851 template = *setup;
2852 break;
2853 }
2854 }
2855 ptr = snd_info_get_str(str, ptr, sizeof(str));
2856 template.periods = simple_strtoul(str, NULL, 10);
2857 ptr = snd_info_get_str(str, ptr, sizeof(str));
2858 template.period_size = simple_strtoul(str, NULL, 10);
2859 for (idx1 = 31; idx1 >= 0; idx1--)
2860 if (template.period_size & (1 << idx1))
2861 break;
2862 for (idx1--; idx1 >= 0; idx1--)
2863 template.period_size &= ~(1 << idx1);
2864 do {
2865 ptr = snd_info_get_str(str, ptr, sizeof(str));
2866 if (!strcmp(str, "disable")) {
2867 template.disable = 1;
2868 } else if (!strcmp(str, "direct")) {
2869 template.direct = 1;
2870 } else if (!strcmp(str, "block")) {
2871 template.block = 1;
2872 } else if (!strcmp(str, "non-block")) {
2873 template.nonblock = 1;
2874 } else if (!strcmp(str, "partial-frag")) {
2875 template.partialfrag = 1;
2876 } else if (!strcmp(str, "no-silence")) {
2877 template.nosilence = 1;
2878 } else if (!strcmp(str, "buggy-ptr")) {
2879 template.buggyptr = 1;
2880 }
2881 } while (*str);
2882 if (setup == NULL) {
2883 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2884 if (! setup) {
2885 buffer->error = -ENOMEM;
2886 mutex_unlock(&pstr->oss.setup_mutex);
2887 return;
2888 }
2889 if (pstr->oss.setup_list == NULL)
2890 pstr->oss.setup_list = setup;
2891 else {
2892 for (setup1 = pstr->oss.setup_list;
2893 setup1->next; setup1 = setup1->next);
2894 setup1->next = setup;
2895 }
2896 template.task_name = kstrdup(task_name, GFP_KERNEL);
2897 if (! template.task_name) {
2898 kfree(setup);
2899 buffer->error = -ENOMEM;
2900 mutex_unlock(&pstr->oss.setup_mutex);
2901 return;
2902 }
2903 }
2904 *setup = template;
2905 mutex_unlock(&pstr->oss.setup_mutex);
2906 }
2907 }
2908
2909 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2910 {
2911 int stream;
2912 for (stream = 0; stream < 2; ++stream) {
2913 struct snd_info_entry *entry;
2914 struct snd_pcm_str *pstr = &pcm->streams[stream];
2915 if (pstr->substream_count == 0)
2916 continue;
2917 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2918 entry->content = SNDRV_INFO_CONTENT_TEXT;
2919 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2920 entry->c.text.read = snd_pcm_oss_proc_read;
2921 entry->c.text.write = snd_pcm_oss_proc_write;
2922 entry->private_data = pstr;
2923 if (snd_info_register(entry) < 0) {
2924 snd_info_free_entry(entry);
2925 entry = NULL;
2926 }
2927 }
2928 pstr->oss.proc_entry = entry;
2929 }
2930 }
2931
2932 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2933 {
2934 int stream;
2935 for (stream = 0; stream < 2; ++stream) {
2936 struct snd_pcm_str *pstr = &pcm->streams[stream];
2937 snd_info_free_entry(pstr->oss.proc_entry);
2938 pstr->oss.proc_entry = NULL;
2939 snd_pcm_oss_proc_free_setup_list(pstr);
2940 }
2941 }
2942 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2943 #define snd_pcm_oss_proc_init(pcm)
2944 #define snd_pcm_oss_proc_done(pcm)
2945 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2946
2947 /*
2948 * ENTRY functions
2949 */
2950
2951 static const struct file_operations snd_pcm_oss_f_reg =
2952 {
2953 .owner = THIS_MODULE,
2954 .read = snd_pcm_oss_read,
2955 .write = snd_pcm_oss_write,
2956 .open = snd_pcm_oss_open,
2957 .release = snd_pcm_oss_release,
2958 .llseek = no_llseek,
2959 .poll = snd_pcm_oss_poll,
2960 .unlocked_ioctl = snd_pcm_oss_ioctl,
2961 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2962 .mmap = snd_pcm_oss_mmap,
2963 };
2964
2965 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2966 {
2967 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2968 pcm->card, index, &snd_pcm_oss_f_reg,
2969 pcm) < 0) {
2970 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
2971 pcm->card->number, pcm->device);
2972 }
2973 }
2974
2975 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2976 {
2977 pcm->oss.reg = 0;
2978 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2979 char name[128];
2980 int duplex;
2981 register_oss_dsp(pcm, 0);
2982 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2983 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2984 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2985 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2986 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2987 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2988 pcm->card->number,
2989 name);
2990 #endif
2991 pcm->oss.reg++;
2992 pcm->oss.reg_mask |= 1;
2993 }
2994 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2995 register_oss_dsp(pcm, 1);
2996 pcm->oss.reg++;
2997 pcm->oss.reg_mask |= 2;
2998 }
2999
3000 if (pcm->oss.reg)
3001 snd_pcm_oss_proc_init(pcm);
3002
3003 return 0;
3004 }
3005
3006 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3007 {
3008 if (pcm->oss.reg) {
3009 if (pcm->oss.reg_mask & 1) {
3010 pcm->oss.reg_mask &= ~1;
3011 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3012 pcm->card, 0);
3013 }
3014 if (pcm->oss.reg_mask & 2) {
3015 pcm->oss.reg_mask &= ~2;
3016 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3017 pcm->card, 1);
3018 }
3019 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3020 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3021 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3022 #endif
3023 }
3024 pcm->oss.reg = 0;
3025 }
3026 return 0;
3027 }
3028
3029 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3030 {
3031 snd_pcm_oss_disconnect_minor(pcm);
3032 snd_pcm_oss_proc_done(pcm);
3033 return 0;
3034 }
3035
3036 static struct snd_pcm_notify snd_pcm_oss_notify =
3037 {
3038 .n_register = snd_pcm_oss_register_minor,
3039 .n_disconnect = snd_pcm_oss_disconnect_minor,
3040 .n_unregister = snd_pcm_oss_unregister_minor,
3041 };
3042
3043 static int __init alsa_pcm_oss_init(void)
3044 {
3045 int i;
3046 int err;
3047
3048 /* check device map table */
3049 for (i = 0; i < SNDRV_CARDS; i++) {
3050 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3051 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3052 i, dsp_map[i]);
3053 dsp_map[i] = 0;
3054 }
3055 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3056 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3057 i, adsp_map[i]);
3058 adsp_map[i] = 1;
3059 }
3060 }
3061 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3062 return err;
3063 return 0;
3064 }
3065
3066 static void __exit alsa_pcm_oss_exit(void)
3067 {
3068 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3069 }
3070
3071 module_init(alsa_pcm_oss_init)
3072 module_exit(alsa_pcm_oss_exit)
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