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1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/time.h>
32#include <linux/vmalloc.h>
33#include <linux/module.h>
34#include <linux/math64.h>
35#include <linux/string.h>
36#include <sound/core.h>
37#include <sound/minors.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include "pcm_plugin.h"
41#include <sound/info.h>
42#include <linux/soundcard.h>
43#include <sound/initval.h>
44#include <sound/mixer_oss.h>
45
46#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
48static int dsp_map[SNDRV_CARDS];
49static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50static bool nonblock_open = 1;
51
52MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54MODULE_LICENSE("GPL");
55module_param_array(dsp_map, int, NULL, 0444);
56MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57module_param_array(adsp_map, int, NULL, 0444);
58MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59module_param(nonblock_open, bool, 0644);
60MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
64static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68static inline mm_segment_t snd_enter_user(void)
69{
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73}
74
75static inline void snd_leave_user(mm_segment_t fs)
76{
77 set_fs(fs);
78}
79
80/*
81 * helper functions to process hw_params
82 */
83static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84{
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105}
106
107static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108{
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129}
130
131static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132{
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139}
140
141/**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149static unsigned int
150snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152{
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165}
166
167/**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175static unsigned int
176snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178{
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191}
192
193static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196{
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204}
205
206static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210{
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220}
221
222static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225{
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251}
252
253/**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269{
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279}
280
281static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284{
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312}
313
314/**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330{
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340}
341
342static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345{
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356}
357
358static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360{
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372}
373
374/* Return 1 if min is nearer to best than max */
375static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378{
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384}
385
386/**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404{
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 if (max < 0) {
457 kfree(save);
458 return max;
459 }
460 last = 1;
461 }
462 _end:
463 kfree(save);
464 if (last)
465 v = snd_pcm_hw_param_last(pcm, params, var, dir);
466 else
467 v = snd_pcm_hw_param_first(pcm, params, var, dir);
468 snd_BUG_ON(v < 0);
469 return v;
470}
471
472static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473 snd_pcm_hw_param_t var, unsigned int val,
474 int dir)
475{
476 int changed;
477 if (hw_is_mask(var)) {
478 struct snd_mask *m = hw_param_mask(params, var);
479 if (val == 0 && dir < 0) {
480 changed = -EINVAL;
481 snd_mask_none(m);
482 } else {
483 if (dir > 0)
484 val++;
485 else if (dir < 0)
486 val--;
487 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488 }
489 } else if (hw_is_interval(var)) {
490 struct snd_interval *i = hw_param_interval(params, var);
491 if (val == 0 && dir < 0) {
492 changed = -EINVAL;
493 snd_interval_none(i);
494 } else if (dir == 0)
495 changed = snd_interval_refine_set(i, val);
496 else {
497 struct snd_interval t;
498 t.openmin = 1;
499 t.openmax = 1;
500 t.empty = 0;
501 t.integer = 0;
502 if (dir < 0) {
503 t.min = val - 1;
504 t.max = val;
505 } else {
506 t.min = val;
507 t.max = val+1;
508 }
509 changed = snd_interval_refine(i, &t);
510 }
511 } else
512 return -EINVAL;
513 if (changed) {
514 params->cmask |= 1 << var;
515 params->rmask |= 1 << var;
516 }
517 return changed;
518}
519
520/**
521 * snd_pcm_hw_param_set
522 * @pcm: PCM instance
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
525 * @val: value to set
526 * @dir: pointer to the direction (-1,0,1) or NULL
527 *
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
531 */
532static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533 struct snd_pcm_hw_params *params,
534 snd_pcm_hw_param_t var, unsigned int val,
535 int dir)
536{
537 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
538 if (changed < 0)
539 return changed;
540 if (params->rmask) {
541 int err = snd_pcm_hw_refine(pcm, params);
542 if (err < 0)
543 return err;
544 }
545 return snd_pcm_hw_param_value(params, var, NULL);
546}
547
548static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549 snd_pcm_hw_param_t var)
550{
551 int changed;
552 changed = snd_interval_setinteger(hw_param_interval(params, var));
553 if (changed) {
554 params->cmask |= 1 << var;
555 params->rmask |= 1 << var;
556 }
557 return changed;
558}
559
560/*
561 * plugin
562 */
563
564#ifdef CONFIG_SND_PCM_OSS_PLUGINS
565static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
566{
567 struct snd_pcm_runtime *runtime = substream->runtime;
568 struct snd_pcm_plugin *plugin, *next;
569
570 plugin = runtime->oss.plugin_first;
571 while (plugin) {
572 next = plugin->next;
573 snd_pcm_plugin_free(plugin);
574 plugin = next;
575 }
576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
577 return 0;
578}
579
580static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
581{
582 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
583 plugin->next = runtime->oss.plugin_first;
584 plugin->prev = NULL;
585 if (runtime->oss.plugin_first) {
586 runtime->oss.plugin_first->prev = plugin;
587 runtime->oss.plugin_first = plugin;
588 } else {
589 runtime->oss.plugin_last =
590 runtime->oss.plugin_first = plugin;
591 }
592 return 0;
593}
594
595int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
596{
597 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
598 plugin->next = NULL;
599 plugin->prev = runtime->oss.plugin_last;
600 if (runtime->oss.plugin_last) {
601 runtime->oss.plugin_last->next = plugin;
602 runtime->oss.plugin_last = plugin;
603 } else {
604 runtime->oss.plugin_last =
605 runtime->oss.plugin_first = plugin;
606 }
607 return 0;
608}
609#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
610
611static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
612{
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
615 long bytes = frames_to_bytes(runtime, frames);
616 if (buffer_size == runtime->oss.buffer_bytes)
617 return bytes;
618#if BITS_PER_LONG >= 64
619 return runtime->oss.buffer_bytes * bytes / buffer_size;
620#else
621 {
622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
623 return div_u64(bsize, buffer_size);
624 }
625#endif
626}
627
628static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
629{
630 struct snd_pcm_runtime *runtime = substream->runtime;
631 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
632 if (buffer_size == runtime->oss.buffer_bytes)
633 return bytes_to_frames(runtime, bytes);
634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
635}
636
637static inline
638snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
639{
640 return runtime->hw_ptr_interrupt;
641}
642
643/* define extended formats in the recent OSS versions (if any) */
644/* linear formats */
645#define AFMT_S32_LE 0x00001000
646#define AFMT_S32_BE 0x00002000
647#define AFMT_S24_LE 0x00008000
648#define AFMT_S24_BE 0x00010000
649#define AFMT_S24_PACKED 0x00040000
650
651/* other supported formats */
652#define AFMT_FLOAT 0x00004000
653#define AFMT_SPDIF_RAW 0x00020000
654
655/* unsupported formats */
656#define AFMT_AC3 0x00000400
657#define AFMT_VORBIS 0x00000800
658
659static snd_pcm_format_t snd_pcm_oss_format_from(int format)
660{
661 switch (format) {
662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
679 default: return SNDRV_PCM_FORMAT_U8;
680 }
681}
682
683static int snd_pcm_oss_format_to(snd_pcm_format_t format)
684{
685 switch (format) {
686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
703 default: return -EINVAL;
704 }
705}
706
707static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
708 struct snd_pcm_hw_params *oss_params,
709 struct snd_pcm_hw_params *slave_params)
710{
711 size_t s;
712 size_t oss_buffer_size, oss_period_size, oss_periods;
713 size_t min_period_size, max_period_size;
714 struct snd_pcm_runtime *runtime = substream->runtime;
715 size_t oss_frame_size;
716
717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718 params_channels(oss_params) / 8;
719
720 oss_buffer_size = snd_pcm_plug_client_size(substream,
721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722 oss_buffer_size = 1 << ld2(oss_buffer_size);
723 if (atomic_read(&substream->mmap_count)) {
724 if (oss_buffer_size > runtime->oss.mmap_bytes)
725 oss_buffer_size = runtime->oss.mmap_bytes;
726 }
727
728 if (substream->oss.setup.period_size > 16)
729 oss_period_size = substream->oss.setup.period_size;
730 else if (runtime->oss.fragshift) {
731 oss_period_size = 1 << runtime->oss.fragshift;
732 if (oss_period_size > oss_buffer_size / 2)
733 oss_period_size = oss_buffer_size / 2;
734 } else {
735 int sd;
736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
737
738 oss_period_size = oss_buffer_size;
739 do {
740 oss_period_size /= 2;
741 } while (oss_period_size > bytes_per_sec);
742 if (runtime->oss.subdivision == 0) {
743 sd = 4;
744 if (oss_period_size / sd > 4096)
745 sd *= 2;
746 if (oss_period_size / sd < 4096)
747 sd = 1;
748 } else
749 sd = runtime->oss.subdivision;
750 oss_period_size /= sd;
751 if (oss_period_size < 16)
752 oss_period_size = 16;
753 }
754
755 min_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 min_period_size *= oss_frame_size;
758 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
759 if (oss_period_size < min_period_size)
760 oss_period_size = min_period_size;
761
762 max_period_size = snd_pcm_plug_client_size(substream,
763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764 max_period_size *= oss_frame_size;
765 max_period_size = 1 << ld2(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
768
769 oss_periods = oss_buffer_size / oss_period_size;
770
771 if (substream->oss.setup.periods > 1)
772 oss_periods = substream->oss.setup.periods;
773
774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776 s = runtime->oss.maxfrags;
777 if (oss_periods > s)
778 oss_periods = s;
779
780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
781 if (s < 2)
782 s = 2;
783 if (oss_periods < s)
784 oss_periods = s;
785
786 while (oss_period_size * oss_periods > oss_buffer_size)
787 oss_period_size /= 2;
788
789 if (oss_period_size < 16)
790 return -EINVAL;
791 runtime->oss.period_bytes = oss_period_size;
792 runtime->oss.period_frames = 1;
793 runtime->oss.periods = oss_periods;
794 return 0;
795}
796
797static int choose_rate(struct snd_pcm_substream *substream,
798 struct snd_pcm_hw_params *params, unsigned int best_rate)
799{
800 struct snd_interval *it;
801 struct snd_pcm_hw_params *save;
802 unsigned int rate, prev;
803
804 save = kmalloc(sizeof(*save), GFP_KERNEL);
805 if (save == NULL)
806 return -ENOMEM;
807 *save = *params;
808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
809
810 /* try multiples of the best rate */
811 rate = best_rate;
812 for (;;) {
813 if (it->max < rate || (it->max == rate && it->openmax))
814 break;
815 if (it->min < rate || (it->min == rate && !it->openmin)) {
816 int ret;
817 ret = snd_pcm_hw_param_set(substream, params,
818 SNDRV_PCM_HW_PARAM_RATE,
819 rate, 0);
820 if (ret == (int)rate) {
821 kfree(save);
822 return rate;
823 }
824 *params = *save;
825 }
826 prev = rate;
827 rate += best_rate;
828 if (rate <= prev)
829 break;
830 }
831
832 /* not found, use the nearest rate */
833 kfree(save);
834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
835}
836
837static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
838{
839 struct snd_pcm_runtime *runtime = substream->runtime;
840 struct snd_pcm_hw_params *params, *sparams;
841 struct snd_pcm_sw_params *sw_params;
842 ssize_t oss_buffer_size, oss_period_size;
843 size_t oss_frame_size;
844 int err;
845 int direct;
846 snd_pcm_format_t format, sformat;
847 int n;
848 struct snd_mask sformat_mask;
849 struct snd_mask mask;
850
851 if (mutex_lock_interruptible(&runtime->oss.params_lock))
852 return -EINTR;
853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854 params = kmalloc(sizeof(*params), GFP_KERNEL);
855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856 if (!sw_params || !params || !sparams) {
857 pcm_dbg(substream->pcm, "No memory\n");
858 err = -ENOMEM;
859 goto failure;
860 }
861
862 if (atomic_read(&substream->mmap_count))
863 direct = 1;
864 else
865 direct = substream->oss.setup.direct;
866
867 _snd_pcm_hw_params_any(sparams);
868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
870 snd_mask_none(&mask);
871 if (atomic_read(&substream->mmap_count))
872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
873 else {
874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
875 if (!direct)
876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
877 }
878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879 if (err < 0) {
880 pcm_dbg(substream->pcm, "No usable accesses\n");
881 err = -EINVAL;
882 goto failure;
883 }
884 choose_rate(substream, sparams, runtime->oss.rate);
885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886
887 format = snd_pcm_oss_format_from(runtime->oss.format);
888
889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
890 if (direct)
891 sformat = format;
892 else
893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894
895 if ((__force int)sformat < 0 ||
896 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
897 for (sformat = (__force snd_pcm_format_t)0;
898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
900 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
901 snd_pcm_oss_format_to(sformat) >= 0)
902 break;
903 }
904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
905 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
906 err = -EINVAL;
907 goto failure;
908 }
909 }
910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
911 if (err < 0)
912 goto failure;
913
914 if (direct) {
915 memcpy(params, sparams, sizeof(*params));
916 } else {
917 _snd_pcm_hw_params_any(params);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
923 runtime->oss.channels, 0);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
925 runtime->oss.rate, 0);
926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
927 params_access(params), params_format(params),
928 params_channels(params), params_rate(params));
929 }
930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
931 params_access(sparams), params_format(sparams),
932 params_channels(sparams), params_rate(sparams));
933
934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
935 params_channels(params) / 8;
936
937#ifdef CONFIG_SND_PCM_OSS_PLUGINS
938 snd_pcm_oss_plugin_clear(substream);
939 if (!direct) {
940 /* add necessary plugins */
941 snd_pcm_oss_plugin_clear(substream);
942 if ((err = snd_pcm_plug_format_plugins(substream,
943 params,
944 sparams)) < 0) {
945 pcm_dbg(substream->pcm,
946 "snd_pcm_plug_format_plugins failed: %i\n", err);
947 snd_pcm_oss_plugin_clear(substream);
948 goto failure;
949 }
950 if (runtime->oss.plugin_first) {
951 struct snd_pcm_plugin *plugin;
952 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
953 pcm_dbg(substream->pcm,
954 "snd_pcm_plugin_build_io failed: %i\n", err);
955 snd_pcm_oss_plugin_clear(substream);
956 goto failure;
957 }
958 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
959 err = snd_pcm_plugin_append(plugin);
960 } else {
961 err = snd_pcm_plugin_insert(plugin);
962 }
963 if (err < 0) {
964 snd_pcm_oss_plugin_clear(substream);
965 goto failure;
966 }
967 }
968 }
969#endif
970
971 err = snd_pcm_oss_period_size(substream, params, sparams);
972 if (err < 0)
973 goto failure;
974
975 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
976 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
977 if (err < 0)
978 goto failure;
979
980 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
981 runtime->oss.periods, NULL);
982 if (err < 0)
983 goto failure;
984
985 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
986
987 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
988 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
989 goto failure;
990 }
991
992 memset(sw_params, 0, sizeof(*sw_params));
993 if (runtime->oss.trigger) {
994 sw_params->start_threshold = 1;
995 } else {
996 sw_params->start_threshold = runtime->boundary;
997 }
998 if (atomic_read(&substream->mmap_count) ||
999 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1000 sw_params->stop_threshold = runtime->boundary;
1001 else
1002 sw_params->stop_threshold = runtime->buffer_size;
1003 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1004 sw_params->period_step = 1;
1005 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1006 1 : runtime->period_size;
1007 if (atomic_read(&substream->mmap_count) ||
1008 substream->oss.setup.nosilence) {
1009 sw_params->silence_threshold = 0;
1010 sw_params->silence_size = 0;
1011 } else {
1012 snd_pcm_uframes_t frames;
1013 frames = runtime->period_size + 16;
1014 if (frames > runtime->buffer_size)
1015 frames = runtime->buffer_size;
1016 sw_params->silence_threshold = frames;
1017 sw_params->silence_size = frames;
1018 }
1019
1020 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1021 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1022 goto failure;
1023 }
1024
1025 runtime->oss.periods = params_periods(sparams);
1026 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1027 if (oss_period_size < 0) {
1028 err = -EINVAL;
1029 goto failure;
1030 }
1031#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1032 if (runtime->oss.plugin_first) {
1033 err = snd_pcm_plug_alloc(substream, oss_period_size);
1034 if (err < 0)
1035 goto failure;
1036 }
1037#endif
1038 oss_period_size *= oss_frame_size;
1039
1040 oss_buffer_size = oss_period_size * runtime->oss.periods;
1041 if (oss_buffer_size < 0) {
1042 err = -EINVAL;
1043 goto failure;
1044 }
1045
1046 runtime->oss.period_bytes = oss_period_size;
1047 runtime->oss.buffer_bytes = oss_buffer_size;
1048
1049 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1050 runtime->oss.period_bytes,
1051 runtime->oss.buffer_bytes);
1052 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1053 params_period_size(sparams),
1054 params_buffer_size(sparams));
1055
1056 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1057 runtime->oss.channels = params_channels(params);
1058 runtime->oss.rate = params_rate(params);
1059
1060 vfree(runtime->oss.buffer);
1061 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1062 if (!runtime->oss.buffer) {
1063 err = -ENOMEM;
1064 goto failure;
1065 }
1066
1067 runtime->oss.params = 0;
1068 runtime->oss.prepare = 1;
1069 runtime->oss.buffer_used = 0;
1070 if (runtime->dma_area)
1071 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1072
1073 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1074
1075 err = 0;
1076failure:
1077 kfree(sw_params);
1078 kfree(params);
1079 kfree(sparams);
1080 mutex_unlock(&runtime->oss.params_lock);
1081 return err;
1082}
1083
1084static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1085{
1086 int idx, err;
1087 struct snd_pcm_substream *asubstream = NULL, *substream;
1088
1089 for (idx = 0; idx < 2; idx++) {
1090 substream = pcm_oss_file->streams[idx];
1091 if (substream == NULL)
1092 continue;
1093 if (asubstream == NULL)
1094 asubstream = substream;
1095 if (substream->runtime->oss.params) {
1096 err = snd_pcm_oss_change_params(substream);
1097 if (err < 0)
1098 return err;
1099 }
1100 }
1101 if (!asubstream)
1102 return -EIO;
1103 if (r_substream)
1104 *r_substream = asubstream;
1105 return 0;
1106}
1107
1108static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1109{
1110 int err;
1111 struct snd_pcm_runtime *runtime = substream->runtime;
1112
1113 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1114 if (err < 0) {
1115 pcm_dbg(substream->pcm,
1116 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1117 return err;
1118 }
1119 runtime->oss.prepare = 0;
1120 runtime->oss.prev_hw_ptr_period = 0;
1121 runtime->oss.period_ptr = 0;
1122 runtime->oss.buffer_used = 0;
1123
1124 return 0;
1125}
1126
1127static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1128{
1129 struct snd_pcm_runtime *runtime;
1130 int err;
1131
1132 if (substream == NULL)
1133 return 0;
1134 runtime = substream->runtime;
1135 if (runtime->oss.params) {
1136 err = snd_pcm_oss_change_params(substream);
1137 if (err < 0)
1138 return err;
1139 }
1140 if (runtime->oss.prepare) {
1141 err = snd_pcm_oss_prepare(substream);
1142 if (err < 0)
1143 return err;
1144 }
1145 return 0;
1146}
1147
1148static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1149{
1150 struct snd_pcm_runtime *runtime;
1151 snd_pcm_uframes_t frames;
1152 int err = 0;
1153
1154 while (1) {
1155 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1156 if (err < 0)
1157 break;
1158 runtime = substream->runtime;
1159 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1160 break;
1161 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1162 /* until avail(delay) <= buffer_size */
1163 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1164 frames /= runtime->period_size;
1165 frames *= runtime->period_size;
1166 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1167 if (err < 0)
1168 break;
1169 }
1170 return err;
1171}
1172
1173snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1174{
1175 struct snd_pcm_runtime *runtime = substream->runtime;
1176 int ret;
1177 while (1) {
1178 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1179 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1180#ifdef OSS_DEBUG
1181 pcm_dbg(substream->pcm,
1182 "pcm_oss: write: recovering from %s\n",
1183 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1184 "XRUN" : "SUSPEND");
1185#endif
1186 ret = snd_pcm_oss_prepare(substream);
1187 if (ret < 0)
1188 break;
1189 }
1190 if (in_kernel) {
1191 mm_segment_t fs;
1192 fs = snd_enter_user();
1193 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1194 snd_leave_user(fs);
1195 } else {
1196 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1197 }
1198 if (ret != -EPIPE && ret != -ESTRPIPE)
1199 break;
1200 /* test, if we can't store new data, because the stream */
1201 /* has not been started */
1202 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1203 return -EAGAIN;
1204 }
1205 return ret;
1206}
1207
1208snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1209{
1210 struct snd_pcm_runtime *runtime = substream->runtime;
1211 snd_pcm_sframes_t delay;
1212 int ret;
1213 while (1) {
1214 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1215 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1216#ifdef OSS_DEBUG
1217 pcm_dbg(substream->pcm,
1218 "pcm_oss: read: recovering from %s\n",
1219 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1220 "XRUN" : "SUSPEND");
1221#endif
1222 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1223 if (ret < 0)
1224 break;
1225 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1226 ret = snd_pcm_oss_prepare(substream);
1227 if (ret < 0)
1228 break;
1229 }
1230 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1231 if (ret < 0)
1232 break;
1233 if (in_kernel) {
1234 mm_segment_t fs;
1235 fs = snd_enter_user();
1236 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1237 snd_leave_user(fs);
1238 } else {
1239 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1240 }
1241 if (ret == -EPIPE) {
1242 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1243 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1244 if (ret < 0)
1245 break;
1246 }
1247 continue;
1248 }
1249 if (ret != -ESTRPIPE)
1250 break;
1251 }
1252 return ret;
1253}
1254
1255snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1256{
1257 struct snd_pcm_runtime *runtime = substream->runtime;
1258 int ret;
1259 while (1) {
1260 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1261 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1262#ifdef OSS_DEBUG
1263 pcm_dbg(substream->pcm,
1264 "pcm_oss: writev: recovering from %s\n",
1265 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1266 "XRUN" : "SUSPEND");
1267#endif
1268 ret = snd_pcm_oss_prepare(substream);
1269 if (ret < 0)
1270 break;
1271 }
1272 if (in_kernel) {
1273 mm_segment_t fs;
1274 fs = snd_enter_user();
1275 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1276 snd_leave_user(fs);
1277 } else {
1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279 }
1280 if (ret != -EPIPE && ret != -ESTRPIPE)
1281 break;
1282
1283 /* test, if we can't store new data, because the stream */
1284 /* has not been started */
1285 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1286 return -EAGAIN;
1287 }
1288 return ret;
1289}
1290
1291snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1292{
1293 struct snd_pcm_runtime *runtime = substream->runtime;
1294 int ret;
1295 while (1) {
1296 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1297 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1298#ifdef OSS_DEBUG
1299 pcm_dbg(substream->pcm,
1300 "pcm_oss: readv: recovering from %s\n",
1301 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1302 "XRUN" : "SUSPEND");
1303#endif
1304 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1305 if (ret < 0)
1306 break;
1307 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1308 ret = snd_pcm_oss_prepare(substream);
1309 if (ret < 0)
1310 break;
1311 }
1312 if (in_kernel) {
1313 mm_segment_t fs;
1314 fs = snd_enter_user();
1315 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1316 snd_leave_user(fs);
1317 } else {
1318 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1319 }
1320 if (ret != -EPIPE && ret != -ESTRPIPE)
1321 break;
1322 }
1323 return ret;
1324}
1325
1326static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1327{
1328 struct snd_pcm_runtime *runtime = substream->runtime;
1329 snd_pcm_sframes_t frames, frames1;
1330#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1331 if (runtime->oss.plugin_first) {
1332 struct snd_pcm_plugin_channel *channels;
1333 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1334 if (!in_kernel) {
1335 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1336 return -EFAULT;
1337 buf = runtime->oss.buffer;
1338 }
1339 frames = bytes / oss_frame_bytes;
1340 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1341 if (frames1 < 0)
1342 return frames1;
1343 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1344 if (frames1 <= 0)
1345 return frames1;
1346 bytes = frames1 * oss_frame_bytes;
1347 } else
1348#endif
1349 {
1350 frames = bytes_to_frames(runtime, bytes);
1351 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1352 if (frames1 <= 0)
1353 return frames1;
1354 bytes = frames_to_bytes(runtime, frames1);
1355 }
1356 return bytes;
1357}
1358
1359static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1360{
1361 size_t xfer = 0;
1362 ssize_t tmp;
1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364
1365 if (atomic_read(&substream->mmap_count))
1366 return -ENXIO;
1367
1368 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1369 return tmp;
1370 mutex_lock(&runtime->oss.params_lock);
1371 while (bytes > 0) {
1372 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1373 tmp = bytes;
1374 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1375 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1376 if (tmp > 0) {
1377 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1378 tmp = -EFAULT;
1379 goto err;
1380 }
1381 }
1382 runtime->oss.buffer_used += tmp;
1383 buf += tmp;
1384 bytes -= tmp;
1385 xfer += tmp;
1386 if (substream->oss.setup.partialfrag ||
1387 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1388 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1389 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1390 if (tmp <= 0)
1391 goto err;
1392 runtime->oss.bytes += tmp;
1393 runtime->oss.period_ptr += tmp;
1394 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1395 if (runtime->oss.period_ptr == 0 ||
1396 runtime->oss.period_ptr == runtime->oss.buffer_used)
1397 runtime->oss.buffer_used = 0;
1398 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1399 tmp = -EAGAIN;
1400 goto err;
1401 }
1402 }
1403 } else {
1404 tmp = snd_pcm_oss_write2(substream,
1405 (const char __force *)buf,
1406 runtime->oss.period_bytes, 0);
1407 if (tmp <= 0)
1408 goto err;
1409 runtime->oss.bytes += tmp;
1410 buf += tmp;
1411 bytes -= tmp;
1412 xfer += tmp;
1413 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1414 tmp != runtime->oss.period_bytes)
1415 break;
1416 }
1417 }
1418 mutex_unlock(&runtime->oss.params_lock);
1419 return xfer;
1420
1421 err:
1422 mutex_unlock(&runtime->oss.params_lock);
1423 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1424}
1425
1426static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1427{
1428 struct snd_pcm_runtime *runtime = substream->runtime;
1429 snd_pcm_sframes_t frames, frames1;
1430#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1431 char __user *final_dst = (char __force __user *)buf;
1432 if (runtime->oss.plugin_first) {
1433 struct snd_pcm_plugin_channel *channels;
1434 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1435 if (!in_kernel)
1436 buf = runtime->oss.buffer;
1437 frames = bytes / oss_frame_bytes;
1438 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1439 if (frames1 < 0)
1440 return frames1;
1441 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1442 if (frames1 <= 0)
1443 return frames1;
1444 bytes = frames1 * oss_frame_bytes;
1445 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1446 return -EFAULT;
1447 } else
1448#endif
1449 {
1450 frames = bytes_to_frames(runtime, bytes);
1451 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1452 if (frames1 <= 0)
1453 return frames1;
1454 bytes = frames_to_bytes(runtime, frames1);
1455 }
1456 return bytes;
1457}
1458
1459static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1460{
1461 size_t xfer = 0;
1462 ssize_t tmp;
1463 struct snd_pcm_runtime *runtime = substream->runtime;
1464
1465 if (atomic_read(&substream->mmap_count))
1466 return -ENXIO;
1467
1468 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1469 return tmp;
1470 mutex_lock(&runtime->oss.params_lock);
1471 while (bytes > 0) {
1472 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1473 if (runtime->oss.buffer_used == 0) {
1474 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1475 if (tmp <= 0)
1476 goto err;
1477 runtime->oss.bytes += tmp;
1478 runtime->oss.period_ptr = tmp;
1479 runtime->oss.buffer_used = tmp;
1480 }
1481 tmp = bytes;
1482 if ((size_t) tmp > runtime->oss.buffer_used)
1483 tmp = runtime->oss.buffer_used;
1484 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1485 tmp = -EFAULT;
1486 goto err;
1487 }
1488 buf += tmp;
1489 bytes -= tmp;
1490 xfer += tmp;
1491 runtime->oss.buffer_used -= tmp;
1492 } else {
1493 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1494 runtime->oss.period_bytes, 0);
1495 if (tmp <= 0)
1496 goto err;
1497 runtime->oss.bytes += tmp;
1498 buf += tmp;
1499 bytes -= tmp;
1500 xfer += tmp;
1501 }
1502 }
1503 mutex_unlock(&runtime->oss.params_lock);
1504 return xfer;
1505
1506 err:
1507 mutex_unlock(&runtime->oss.params_lock);
1508 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1509}
1510
1511static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1512{
1513 struct snd_pcm_substream *substream;
1514 struct snd_pcm_runtime *runtime;
1515 int i;
1516
1517 for (i = 0; i < 2; i++) {
1518 substream = pcm_oss_file->streams[i];
1519 if (!substream)
1520 continue;
1521 runtime = substream->runtime;
1522 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1523 runtime->oss.prepare = 1;
1524 runtime->oss.buffer_used = 0;
1525 runtime->oss.prev_hw_ptr_period = 0;
1526 runtime->oss.period_ptr = 0;
1527 }
1528 return 0;
1529}
1530
1531static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1532{
1533 struct snd_pcm_substream *substream;
1534 int err;
1535
1536 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1537 if (substream != NULL) {
1538 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1539 return err;
1540 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1541 }
1542 /* note: all errors from the start action are ignored */
1543 /* OSS apps do not know, how to handle them */
1544 return 0;
1545}
1546
1547static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1548{
1549 struct snd_pcm_runtime *runtime;
1550 ssize_t result = 0;
1551 snd_pcm_state_t state;
1552 long res;
1553 wait_queue_t wait;
1554
1555 runtime = substream->runtime;
1556 init_waitqueue_entry(&wait, current);
1557 add_wait_queue(&runtime->sleep, &wait);
1558#ifdef OSS_DEBUG
1559 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1560#endif
1561 while (1) {
1562 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1563 if (result > 0) {
1564 runtime->oss.buffer_used = 0;
1565 result = 0;
1566 break;
1567 }
1568 if (result != 0 && result != -EAGAIN)
1569 break;
1570 result = 0;
1571 set_current_state(TASK_INTERRUPTIBLE);
1572 snd_pcm_stream_lock_irq(substream);
1573 state = runtime->status->state;
1574 snd_pcm_stream_unlock_irq(substream);
1575 if (state != SNDRV_PCM_STATE_RUNNING) {
1576 set_current_state(TASK_RUNNING);
1577 break;
1578 }
1579 res = schedule_timeout(10 * HZ);
1580 if (signal_pending(current)) {
1581 result = -ERESTARTSYS;
1582 break;
1583 }
1584 if (res == 0) {
1585 pcm_err(substream->pcm,
1586 "OSS sync error - DMA timeout\n");
1587 result = -EIO;
1588 break;
1589 }
1590 }
1591 remove_wait_queue(&runtime->sleep, &wait);
1592 return result;
1593}
1594
1595static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1596{
1597 int err = 0;
1598 unsigned int saved_f_flags;
1599 struct snd_pcm_substream *substream;
1600 struct snd_pcm_runtime *runtime;
1601 snd_pcm_format_t format;
1602 unsigned long width;
1603 size_t size;
1604
1605 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1606 if (substream != NULL) {
1607 runtime = substream->runtime;
1608 if (atomic_read(&substream->mmap_count))
1609 goto __direct;
1610 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1611 return err;
1612 format = snd_pcm_oss_format_from(runtime->oss.format);
1613 width = snd_pcm_format_physical_width(format);
1614 mutex_lock(&runtime->oss.params_lock);
1615 if (runtime->oss.buffer_used > 0) {
1616#ifdef OSS_DEBUG
1617 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1618#endif
1619 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1620 snd_pcm_format_set_silence(format,
1621 runtime->oss.buffer + runtime->oss.buffer_used,
1622 size);
1623 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1624 if (err < 0) {
1625 mutex_unlock(&runtime->oss.params_lock);
1626 return err;
1627 }
1628 } else if (runtime->oss.period_ptr > 0) {
1629#ifdef OSS_DEBUG
1630 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1631#endif
1632 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1633 snd_pcm_format_set_silence(format,
1634 runtime->oss.buffer,
1635 size * 8 / width);
1636 err = snd_pcm_oss_sync1(substream, size);
1637 if (err < 0) {
1638 mutex_unlock(&runtime->oss.params_lock);
1639 return err;
1640 }
1641 }
1642 /*
1643 * The ALSA's period might be a bit large than OSS one.
1644 * Fill the remain portion of ALSA period with zeros.
1645 */
1646 size = runtime->control->appl_ptr % runtime->period_size;
1647 if (size > 0) {
1648 size = runtime->period_size - size;
1649 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1650 size = (runtime->frame_bits * size) / 8;
1651 while (size > 0) {
1652 mm_segment_t fs;
1653 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1654 size -= size1;
1655 size1 *= 8;
1656 size1 /= runtime->sample_bits;
1657 snd_pcm_format_set_silence(runtime->format,
1658 runtime->oss.buffer,
1659 size1);
1660 size1 /= runtime->channels; /* frames */
1661 fs = snd_enter_user();
1662 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1663 snd_leave_user(fs);
1664 }
1665 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1666 void __user *buffers[runtime->channels];
1667 memset(buffers, 0, runtime->channels * sizeof(void *));
1668 snd_pcm_lib_writev(substream, buffers, size);
1669 }
1670 }
1671 mutex_unlock(&runtime->oss.params_lock);
1672 /*
1673 * finish sync: drain the buffer
1674 */
1675 __direct:
1676 saved_f_flags = substream->f_flags;
1677 substream->f_flags &= ~O_NONBLOCK;
1678 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1679 substream->f_flags = saved_f_flags;
1680 if (err < 0)
1681 return err;
1682 runtime->oss.prepare = 1;
1683 }
1684
1685 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1686 if (substream != NULL) {
1687 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1688 return err;
1689 runtime = substream->runtime;
1690 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1691 if (err < 0)
1692 return err;
1693 runtime->oss.buffer_used = 0;
1694 runtime->oss.prepare = 1;
1695 }
1696 return 0;
1697}
1698
1699static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1700{
1701 int idx;
1702
1703 for (idx = 1; idx >= 0; --idx) {
1704 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1705 struct snd_pcm_runtime *runtime;
1706 if (substream == NULL)
1707 continue;
1708 runtime = substream->runtime;
1709 if (rate < 1000)
1710 rate = 1000;
1711 else if (rate > 192000)
1712 rate = 192000;
1713 if (runtime->oss.rate != rate) {
1714 runtime->oss.params = 1;
1715 runtime->oss.rate = rate;
1716 }
1717 }
1718 return snd_pcm_oss_get_rate(pcm_oss_file);
1719}
1720
1721static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1722{
1723 struct snd_pcm_substream *substream;
1724 int err;
1725
1726 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1727 return err;
1728 return substream->runtime->oss.rate;
1729}
1730
1731static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1732{
1733 int idx;
1734 if (channels < 1)
1735 channels = 1;
1736 if (channels > 128)
1737 return -EINVAL;
1738 for (idx = 1; idx >= 0; --idx) {
1739 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1740 struct snd_pcm_runtime *runtime;
1741 if (substream == NULL)
1742 continue;
1743 runtime = substream->runtime;
1744 if (runtime->oss.channels != channels) {
1745 runtime->oss.params = 1;
1746 runtime->oss.channels = channels;
1747 }
1748 }
1749 return snd_pcm_oss_get_channels(pcm_oss_file);
1750}
1751
1752static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1753{
1754 struct snd_pcm_substream *substream;
1755 int err;
1756
1757 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1758 return err;
1759 return substream->runtime->oss.channels;
1760}
1761
1762static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1763{
1764 struct snd_pcm_substream *substream;
1765 int err;
1766
1767 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1768 return err;
1769 return substream->runtime->oss.period_bytes;
1770}
1771
1772static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1773{
1774 struct snd_pcm_substream *substream;
1775 int err;
1776 int direct;
1777 struct snd_pcm_hw_params *params;
1778 unsigned int formats = 0;
1779 struct snd_mask format_mask;
1780 int fmt;
1781
1782 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1783 return err;
1784 if (atomic_read(&substream->mmap_count))
1785 direct = 1;
1786 else
1787 direct = substream->oss.setup.direct;
1788 if (!direct)
1789 return AFMT_MU_LAW | AFMT_U8 |
1790 AFMT_S16_LE | AFMT_S16_BE |
1791 AFMT_S8 | AFMT_U16_LE |
1792 AFMT_U16_BE |
1793 AFMT_S32_LE | AFMT_S32_BE |
1794 AFMT_S24_LE | AFMT_S24_BE |
1795 AFMT_S24_PACKED;
1796 params = kmalloc(sizeof(*params), GFP_KERNEL);
1797 if (!params)
1798 return -ENOMEM;
1799 _snd_pcm_hw_params_any(params);
1800 err = snd_pcm_hw_refine(substream, params);
1801 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1802 kfree(params);
1803 if (err < 0)
1804 return err;
1805 for (fmt = 0; fmt < 32; ++fmt) {
1806 if (snd_mask_test(&format_mask, fmt)) {
1807 int f = snd_pcm_oss_format_to(fmt);
1808 if (f >= 0)
1809 formats |= f;
1810 }
1811 }
1812 return formats;
1813}
1814
1815static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1816{
1817 int formats, idx;
1818
1819 if (format != AFMT_QUERY) {
1820 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1821 if (formats < 0)
1822 return formats;
1823 if (!(formats & format))
1824 format = AFMT_U8;
1825 for (idx = 1; idx >= 0; --idx) {
1826 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1827 struct snd_pcm_runtime *runtime;
1828 if (substream == NULL)
1829 continue;
1830 runtime = substream->runtime;
1831 if (runtime->oss.format != format) {
1832 runtime->oss.params = 1;
1833 runtime->oss.format = format;
1834 }
1835 }
1836 }
1837 return snd_pcm_oss_get_format(pcm_oss_file);
1838}
1839
1840static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1841{
1842 struct snd_pcm_substream *substream;
1843 int err;
1844
1845 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1846 return err;
1847 return substream->runtime->oss.format;
1848}
1849
1850static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1851{
1852 struct snd_pcm_runtime *runtime;
1853
1854 if (substream == NULL)
1855 return 0;
1856 runtime = substream->runtime;
1857 if (subdivide == 0) {
1858 subdivide = runtime->oss.subdivision;
1859 if (subdivide == 0)
1860 subdivide = 1;
1861 return subdivide;
1862 }
1863 if (runtime->oss.subdivision || runtime->oss.fragshift)
1864 return -EINVAL;
1865 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1866 subdivide != 8 && subdivide != 16)
1867 return -EINVAL;
1868 runtime->oss.subdivision = subdivide;
1869 runtime->oss.params = 1;
1870 return subdivide;
1871}
1872
1873static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1874{
1875 int err = -EINVAL, idx;
1876
1877 for (idx = 1; idx >= 0; --idx) {
1878 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1879 if (substream == NULL)
1880 continue;
1881 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1882 return err;
1883 }
1884 return err;
1885}
1886
1887static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1888{
1889 struct snd_pcm_runtime *runtime;
1890
1891 if (substream == NULL)
1892 return 0;
1893 runtime = substream->runtime;
1894 if (runtime->oss.subdivision || runtime->oss.fragshift)
1895 return -EINVAL;
1896 runtime->oss.fragshift = val & 0xffff;
1897 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1898 if (runtime->oss.fragshift < 4) /* < 16 */
1899 runtime->oss.fragshift = 4;
1900 if (runtime->oss.maxfrags < 2)
1901 runtime->oss.maxfrags = 2;
1902 runtime->oss.params = 1;
1903 return 0;
1904}
1905
1906static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1907{
1908 int err = -EINVAL, idx;
1909
1910 for (idx = 1; idx >= 0; --idx) {
1911 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1912 if (substream == NULL)
1913 continue;
1914 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1915 return err;
1916 }
1917 return err;
1918}
1919
1920static int snd_pcm_oss_nonblock(struct file * file)
1921{
1922 spin_lock(&file->f_lock);
1923 file->f_flags |= O_NONBLOCK;
1924 spin_unlock(&file->f_lock);
1925 return 0;
1926}
1927
1928static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1929{
1930
1931 if (substream == NULL) {
1932 res &= ~DSP_CAP_DUPLEX;
1933 return res;
1934 }
1935#ifdef DSP_CAP_MULTI
1936 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1937 if (substream->pstr->substream_count > 1)
1938 res |= DSP_CAP_MULTI;
1939#endif
1940 /* DSP_CAP_REALTIME is set all times: */
1941 /* all ALSA drivers can return actual pointer in ring buffer */
1942#if defined(DSP_CAP_REALTIME) && 0
1943 {
1944 struct snd_pcm_runtime *runtime = substream->runtime;
1945 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1946 res &= ~DSP_CAP_REALTIME;
1947 }
1948#endif
1949 return res;
1950}
1951
1952static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1953{
1954 int result, idx;
1955
1956 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1957 for (idx = 0; idx < 2; idx++) {
1958 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1959 result = snd_pcm_oss_get_caps1(substream, result);
1960 }
1961 result |= 0x0001; /* revision - same as SB AWE 64 */
1962 return result;
1963}
1964
1965static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1966 snd_pcm_uframes_t hw_ptr)
1967{
1968 struct snd_pcm_runtime *runtime = substream->runtime;
1969 snd_pcm_uframes_t appl_ptr;
1970 appl_ptr = hw_ptr + runtime->buffer_size;
1971 appl_ptr %= runtime->boundary;
1972 runtime->control->appl_ptr = appl_ptr;
1973}
1974
1975static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1976{
1977 struct snd_pcm_runtime *runtime;
1978 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1979 int err, cmd;
1980
1981#ifdef OSS_DEBUG
1982 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1983#endif
1984
1985 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1986 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1987
1988 if (psubstream) {
1989 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1990 return err;
1991 }
1992 if (csubstream) {
1993 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1994 return err;
1995 }
1996 if (psubstream) {
1997 runtime = psubstream->runtime;
1998 if (trigger & PCM_ENABLE_OUTPUT) {
1999 if (runtime->oss.trigger)
2000 goto _skip1;
2001 if (atomic_read(&psubstream->mmap_count))
2002 snd_pcm_oss_simulate_fill(psubstream,
2003 get_hw_ptr_period(runtime));
2004 runtime->oss.trigger = 1;
2005 runtime->start_threshold = 1;
2006 cmd = SNDRV_PCM_IOCTL_START;
2007 } else {
2008 if (!runtime->oss.trigger)
2009 goto _skip1;
2010 runtime->oss.trigger = 0;
2011 runtime->start_threshold = runtime->boundary;
2012 cmd = SNDRV_PCM_IOCTL_DROP;
2013 runtime->oss.prepare = 1;
2014 }
2015 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2016 if (err < 0)
2017 return err;
2018 }
2019 _skip1:
2020 if (csubstream) {
2021 runtime = csubstream->runtime;
2022 if (trigger & PCM_ENABLE_INPUT) {
2023 if (runtime->oss.trigger)
2024 goto _skip2;
2025 runtime->oss.trigger = 1;
2026 runtime->start_threshold = 1;
2027 cmd = SNDRV_PCM_IOCTL_START;
2028 } else {
2029 if (!runtime->oss.trigger)
2030 goto _skip2;
2031 runtime->oss.trigger = 0;
2032 runtime->start_threshold = runtime->boundary;
2033 cmd = SNDRV_PCM_IOCTL_DROP;
2034 runtime->oss.prepare = 1;
2035 }
2036 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2037 if (err < 0)
2038 return err;
2039 }
2040 _skip2:
2041 return 0;
2042}
2043
2044static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2045{
2046 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2047 int result = 0;
2048
2049 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2050 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2051 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2052 result |= PCM_ENABLE_OUTPUT;
2053 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2054 result |= PCM_ENABLE_INPUT;
2055 return result;
2056}
2057
2058static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2059{
2060 struct snd_pcm_substream *substream;
2061 struct snd_pcm_runtime *runtime;
2062 snd_pcm_sframes_t delay;
2063 int err;
2064
2065 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2066 if (substream == NULL)
2067 return -EINVAL;
2068 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2069 return err;
2070 runtime = substream->runtime;
2071 if (runtime->oss.params || runtime->oss.prepare)
2072 return 0;
2073 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2074 if (err == -EPIPE)
2075 delay = 0; /* hack for broken OSS applications */
2076 else if (err < 0)
2077 return err;
2078 return snd_pcm_oss_bytes(substream, delay);
2079}
2080
2081static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2082{
2083 struct snd_pcm_substream *substream;
2084 struct snd_pcm_runtime *runtime;
2085 snd_pcm_sframes_t delay;
2086 int fixup;
2087 struct count_info info;
2088 int err;
2089
2090 if (_info == NULL)
2091 return -EFAULT;
2092 substream = pcm_oss_file->streams[stream];
2093 if (substream == NULL)
2094 return -EINVAL;
2095 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2096 return err;
2097 runtime = substream->runtime;
2098 if (runtime->oss.params || runtime->oss.prepare) {
2099 memset(&info, 0, sizeof(info));
2100 if (copy_to_user(_info, &info, sizeof(info)))
2101 return -EFAULT;
2102 return 0;
2103 }
2104 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2105 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2106 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2107 err = 0;
2108 delay = 0;
2109 fixup = 0;
2110 } else {
2111 fixup = runtime->oss.buffer_used;
2112 }
2113 } else {
2114 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2115 fixup = -runtime->oss.buffer_used;
2116 }
2117 if (err < 0)
2118 return err;
2119 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2120 if (atomic_read(&substream->mmap_count)) {
2121 snd_pcm_sframes_t n;
2122 delay = get_hw_ptr_period(runtime);
2123 n = delay - runtime->oss.prev_hw_ptr_period;
2124 if (n < 0)
2125 n += runtime->boundary;
2126 info.blocks = n / runtime->period_size;
2127 runtime->oss.prev_hw_ptr_period = delay;
2128 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2129 snd_pcm_oss_simulate_fill(substream, delay);
2130 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2131 } else {
2132 delay = snd_pcm_oss_bytes(substream, delay);
2133 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2134 if (substream->oss.setup.buggyptr)
2135 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2136 else
2137 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2138 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2139 } else {
2140 delay += fixup;
2141 info.blocks = delay / runtime->oss.period_bytes;
2142 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2143 }
2144 }
2145 if (copy_to_user(_info, &info, sizeof(info)))
2146 return -EFAULT;
2147 return 0;
2148}
2149
2150static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2151{
2152 struct snd_pcm_substream *substream;
2153 struct snd_pcm_runtime *runtime;
2154 snd_pcm_sframes_t avail;
2155 int fixup;
2156 struct audio_buf_info info;
2157 int err;
2158
2159 if (_info == NULL)
2160 return -EFAULT;
2161 substream = pcm_oss_file->streams[stream];
2162 if (substream == NULL)
2163 return -EINVAL;
2164 runtime = substream->runtime;
2165
2166 if (runtime->oss.params &&
2167 (err = snd_pcm_oss_change_params(substream)) < 0)
2168 return err;
2169
2170 info.fragsize = runtime->oss.period_bytes;
2171 info.fragstotal = runtime->periods;
2172 if (runtime->oss.prepare) {
2173 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2174 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2175 info.fragments = runtime->oss.periods;
2176 } else {
2177 info.bytes = 0;
2178 info.fragments = 0;
2179 }
2180 } else {
2181 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2182 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2183 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2184 avail = runtime->buffer_size;
2185 err = 0;
2186 fixup = 0;
2187 } else {
2188 avail = runtime->buffer_size - avail;
2189 fixup = -runtime->oss.buffer_used;
2190 }
2191 } else {
2192 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2193 fixup = runtime->oss.buffer_used;
2194 }
2195 if (err < 0)
2196 return err;
2197 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2198 info.fragments = info.bytes / runtime->oss.period_bytes;
2199 }
2200
2201#ifdef OSS_DEBUG
2202 pcm_dbg(substream->pcm,
2203 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2204 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2205#endif
2206 if (copy_to_user(_info, &info, sizeof(info)))
2207 return -EFAULT;
2208 return 0;
2209}
2210
2211static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2212{
2213 // it won't be probably implemented
2214 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2215 return -EINVAL;
2216}
2217
2218static const char *strip_task_path(const char *path)
2219{
2220 const char *ptr, *ptrl = NULL;
2221 for (ptr = path; *ptr; ptr++) {
2222 if (*ptr == '/')
2223 ptrl = ptr + 1;
2224 }
2225 return ptrl;
2226}
2227
2228static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2229 const char *task_name,
2230 struct snd_pcm_oss_setup *rsetup)
2231{
2232 struct snd_pcm_oss_setup *setup;
2233
2234 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2235 do {
2236 for (setup = pcm->streams[stream].oss.setup_list; setup;
2237 setup = setup->next) {
2238 if (!strcmp(setup->task_name, task_name))
2239 goto out;
2240 }
2241 } while ((task_name = strip_task_path(task_name)) != NULL);
2242 out:
2243 if (setup)
2244 *rsetup = *setup;
2245 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2246}
2247
2248static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2249{
2250 struct snd_pcm_runtime *runtime;
2251 runtime = substream->runtime;
2252 vfree(runtime->oss.buffer);
2253 runtime->oss.buffer = NULL;
2254#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2255 snd_pcm_oss_plugin_clear(substream);
2256#endif
2257 substream->oss.oss = 0;
2258}
2259
2260static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2261 struct snd_pcm_oss_setup *setup,
2262 int minor)
2263{
2264 struct snd_pcm_runtime *runtime;
2265
2266 substream->oss.oss = 1;
2267 substream->oss.setup = *setup;
2268 if (setup->nonblock)
2269 substream->f_flags |= O_NONBLOCK;
2270 else if (setup->block)
2271 substream->f_flags &= ~O_NONBLOCK;
2272 runtime = substream->runtime;
2273 runtime->oss.params = 1;
2274 runtime->oss.trigger = 1;
2275 runtime->oss.rate = 8000;
2276 mutex_init(&runtime->oss.params_lock);
2277 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2278 case SNDRV_MINOR_OSS_PCM_8:
2279 runtime->oss.format = AFMT_U8;
2280 break;
2281 case SNDRV_MINOR_OSS_PCM_16:
2282 runtime->oss.format = AFMT_S16_LE;
2283 break;
2284 default:
2285 runtime->oss.format = AFMT_MU_LAW;
2286 }
2287 runtime->oss.channels = 1;
2288 runtime->oss.fragshift = 0;
2289 runtime->oss.maxfrags = 0;
2290 runtime->oss.subdivision = 0;
2291 substream->pcm_release = snd_pcm_oss_release_substream;
2292}
2293
2294static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2295{
2296 int cidx;
2297 if (!pcm_oss_file)
2298 return 0;
2299 for (cidx = 0; cidx < 2; ++cidx) {
2300 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2301 if (substream)
2302 snd_pcm_release_substream(substream);
2303 }
2304 kfree(pcm_oss_file);
2305 return 0;
2306}
2307
2308static int snd_pcm_oss_open_file(struct file *file,
2309 struct snd_pcm *pcm,
2310 struct snd_pcm_oss_file **rpcm_oss_file,
2311 int minor,
2312 struct snd_pcm_oss_setup *setup)
2313{
2314 int idx, err;
2315 struct snd_pcm_oss_file *pcm_oss_file;
2316 struct snd_pcm_substream *substream;
2317 fmode_t f_mode = file->f_mode;
2318
2319 if (rpcm_oss_file)
2320 *rpcm_oss_file = NULL;
2321
2322 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2323 if (pcm_oss_file == NULL)
2324 return -ENOMEM;
2325
2326 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2327 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2328 f_mode = FMODE_WRITE;
2329
2330 file->f_flags &= ~O_APPEND;
2331 for (idx = 0; idx < 2; idx++) {
2332 if (setup[idx].disable)
2333 continue;
2334 if (! pcm->streams[idx].substream_count)
2335 continue; /* no matching substream */
2336 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2337 if (! (f_mode & FMODE_WRITE))
2338 continue;
2339 } else {
2340 if (! (f_mode & FMODE_READ))
2341 continue;
2342 }
2343 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2344 if (err < 0) {
2345 snd_pcm_oss_release_file(pcm_oss_file);
2346 return err;
2347 }
2348
2349 pcm_oss_file->streams[idx] = substream;
2350 substream->file = pcm_oss_file;
2351 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2352 }
2353
2354 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2355 snd_pcm_oss_release_file(pcm_oss_file);
2356 return -EINVAL;
2357 }
2358
2359 file->private_data = pcm_oss_file;
2360 if (rpcm_oss_file)
2361 *rpcm_oss_file = pcm_oss_file;
2362 return 0;
2363}
2364
2365
2366static int snd_task_name(struct task_struct *task, char *name, size_t size)
2367{
2368 unsigned int idx;
2369
2370 if (snd_BUG_ON(!task || !name || size < 2))
2371 return -EINVAL;
2372 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2373 name[idx] = task->comm[idx];
2374 name[idx] = '\0';
2375 return 0;
2376}
2377
2378static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2379{
2380 int err;
2381 char task_name[32];
2382 struct snd_pcm *pcm;
2383 struct snd_pcm_oss_file *pcm_oss_file;
2384 struct snd_pcm_oss_setup setup[2];
2385 int nonblock;
2386 wait_queue_t wait;
2387
2388 err = nonseekable_open(inode, file);
2389 if (err < 0)
2390 return err;
2391
2392 pcm = snd_lookup_oss_minor_data(iminor(inode),
2393 SNDRV_OSS_DEVICE_TYPE_PCM);
2394 if (pcm == NULL) {
2395 err = -ENODEV;
2396 goto __error1;
2397 }
2398 err = snd_card_file_add(pcm->card, file);
2399 if (err < 0)
2400 goto __error1;
2401 if (!try_module_get(pcm->card->module)) {
2402 err = -EFAULT;
2403 goto __error2;
2404 }
2405 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2406 err = -EFAULT;
2407 goto __error;
2408 }
2409 memset(setup, 0, sizeof(setup));
2410 if (file->f_mode & FMODE_WRITE)
2411 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2412 task_name, &setup[0]);
2413 if (file->f_mode & FMODE_READ)
2414 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2415 task_name, &setup[1]);
2416
2417 nonblock = !!(file->f_flags & O_NONBLOCK);
2418 if (!nonblock)
2419 nonblock = nonblock_open;
2420
2421 init_waitqueue_entry(&wait, current);
2422 add_wait_queue(&pcm->open_wait, &wait);
2423 mutex_lock(&pcm->open_mutex);
2424 while (1) {
2425 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2426 iminor(inode), setup);
2427 if (err >= 0)
2428 break;
2429 if (err == -EAGAIN) {
2430 if (nonblock) {
2431 err = -EBUSY;
2432 break;
2433 }
2434 } else
2435 break;
2436 set_current_state(TASK_INTERRUPTIBLE);
2437 mutex_unlock(&pcm->open_mutex);
2438 schedule();
2439 mutex_lock(&pcm->open_mutex);
2440 if (pcm->card->shutdown) {
2441 err = -ENODEV;
2442 break;
2443 }
2444 if (signal_pending(current)) {
2445 err = -ERESTARTSYS;
2446 break;
2447 }
2448 }
2449 remove_wait_queue(&pcm->open_wait, &wait);
2450 mutex_unlock(&pcm->open_mutex);
2451 if (err < 0)
2452 goto __error;
2453 snd_card_unref(pcm->card);
2454 return err;
2455
2456 __error:
2457 module_put(pcm->card->module);
2458 __error2:
2459 snd_card_file_remove(pcm->card, file);
2460 __error1:
2461 if (pcm)
2462 snd_card_unref(pcm->card);
2463 return err;
2464}
2465
2466static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2467{
2468 struct snd_pcm *pcm;
2469 struct snd_pcm_substream *substream;
2470 struct snd_pcm_oss_file *pcm_oss_file;
2471
2472 pcm_oss_file = file->private_data;
2473 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2474 if (substream == NULL)
2475 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2476 if (snd_BUG_ON(!substream))
2477 return -ENXIO;
2478 pcm = substream->pcm;
2479 if (!pcm->card->shutdown)
2480 snd_pcm_oss_sync(pcm_oss_file);
2481 mutex_lock(&pcm->open_mutex);
2482 snd_pcm_oss_release_file(pcm_oss_file);
2483 mutex_unlock(&pcm->open_mutex);
2484 wake_up(&pcm->open_wait);
2485 module_put(pcm->card->module);
2486 snd_card_file_remove(pcm->card, file);
2487 return 0;
2488}
2489
2490static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2491{
2492 struct snd_pcm_oss_file *pcm_oss_file;
2493 int __user *p = (int __user *)arg;
2494 int res;
2495
2496 pcm_oss_file = file->private_data;
2497 if (cmd == OSS_GETVERSION)
2498 return put_user(SNDRV_OSS_VERSION, p);
2499 if (cmd == OSS_ALSAEMULVER)
2500 return put_user(1, p);
2501#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2502 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2503 struct snd_pcm_substream *substream;
2504 int idx;
2505 for (idx = 0; idx < 2; ++idx) {
2506 substream = pcm_oss_file->streams[idx];
2507 if (substream != NULL)
2508 break;
2509 }
2510 if (snd_BUG_ON(idx >= 2))
2511 return -ENXIO;
2512 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2513 }
2514#endif
2515 if (((cmd >> 8) & 0xff) != 'P')
2516 return -EINVAL;
2517#ifdef OSS_DEBUG
2518 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2519#endif
2520 switch (cmd) {
2521 case SNDCTL_DSP_RESET:
2522 return snd_pcm_oss_reset(pcm_oss_file);
2523 case SNDCTL_DSP_SYNC:
2524 return snd_pcm_oss_sync(pcm_oss_file);
2525 case SNDCTL_DSP_SPEED:
2526 if (get_user(res, p))
2527 return -EFAULT;
2528 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2529 return res;
2530 return put_user(res, p);
2531 case SOUND_PCM_READ_RATE:
2532 res = snd_pcm_oss_get_rate(pcm_oss_file);
2533 if (res < 0)
2534 return res;
2535 return put_user(res, p);
2536 case SNDCTL_DSP_STEREO:
2537 if (get_user(res, p))
2538 return -EFAULT;
2539 res = res > 0 ? 2 : 1;
2540 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2541 return res;
2542 return put_user(--res, p);
2543 case SNDCTL_DSP_GETBLKSIZE:
2544 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2545 if (res < 0)
2546 return res;
2547 return put_user(res, p);
2548 case SNDCTL_DSP_SETFMT:
2549 if (get_user(res, p))
2550 return -EFAULT;
2551 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2552 if (res < 0)
2553 return res;
2554 return put_user(res, p);
2555 case SOUND_PCM_READ_BITS:
2556 res = snd_pcm_oss_get_format(pcm_oss_file);
2557 if (res < 0)
2558 return res;
2559 return put_user(res, p);
2560 case SNDCTL_DSP_CHANNELS:
2561 if (get_user(res, p))
2562 return -EFAULT;
2563 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2564 if (res < 0)
2565 return res;
2566 return put_user(res, p);
2567 case SOUND_PCM_READ_CHANNELS:
2568 res = snd_pcm_oss_get_channels(pcm_oss_file);
2569 if (res < 0)
2570 return res;
2571 return put_user(res, p);
2572 case SOUND_PCM_WRITE_FILTER:
2573 case SOUND_PCM_READ_FILTER:
2574 return -EIO;
2575 case SNDCTL_DSP_POST:
2576 return snd_pcm_oss_post(pcm_oss_file);
2577 case SNDCTL_DSP_SUBDIVIDE:
2578 if (get_user(res, p))
2579 return -EFAULT;
2580 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2581 if (res < 0)
2582 return res;
2583 return put_user(res, p);
2584 case SNDCTL_DSP_SETFRAGMENT:
2585 if (get_user(res, p))
2586 return -EFAULT;
2587 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2588 case SNDCTL_DSP_GETFMTS:
2589 res = snd_pcm_oss_get_formats(pcm_oss_file);
2590 if (res < 0)
2591 return res;
2592 return put_user(res, p);
2593 case SNDCTL_DSP_GETOSPACE:
2594 case SNDCTL_DSP_GETISPACE:
2595 return snd_pcm_oss_get_space(pcm_oss_file,
2596 cmd == SNDCTL_DSP_GETISPACE ?
2597 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2598 (struct audio_buf_info __user *) arg);
2599 case SNDCTL_DSP_NONBLOCK:
2600 return snd_pcm_oss_nonblock(file);
2601 case SNDCTL_DSP_GETCAPS:
2602 res = snd_pcm_oss_get_caps(pcm_oss_file);
2603 if (res < 0)
2604 return res;
2605 return put_user(res, p);
2606 case SNDCTL_DSP_GETTRIGGER:
2607 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2608 if (res < 0)
2609 return res;
2610 return put_user(res, p);
2611 case SNDCTL_DSP_SETTRIGGER:
2612 if (get_user(res, p))
2613 return -EFAULT;
2614 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2615 case SNDCTL_DSP_GETIPTR:
2616 case SNDCTL_DSP_GETOPTR:
2617 return snd_pcm_oss_get_ptr(pcm_oss_file,
2618 cmd == SNDCTL_DSP_GETIPTR ?
2619 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2620 (struct count_info __user *) arg);
2621 case SNDCTL_DSP_MAPINBUF:
2622 case SNDCTL_DSP_MAPOUTBUF:
2623 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2624 cmd == SNDCTL_DSP_MAPINBUF ?
2625 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2626 (struct buffmem_desc __user *) arg);
2627 case SNDCTL_DSP_SETSYNCRO:
2628 /* stop DMA now.. */
2629 return 0;
2630 case SNDCTL_DSP_SETDUPLEX:
2631 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2632 return 0;
2633 return -EIO;
2634 case SNDCTL_DSP_GETODELAY:
2635 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2636 if (res < 0) {
2637 /* it's for sure, some broken apps don't check for error codes */
2638 put_user(0, p);
2639 return res;
2640 }
2641 return put_user(res, p);
2642 case SNDCTL_DSP_PROFILE:
2643 return 0; /* silently ignore */
2644 default:
2645 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2646 }
2647 return -EINVAL;
2648}
2649
2650#ifdef CONFIG_COMPAT
2651/* all compatible */
2652#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2653#else
2654#define snd_pcm_oss_ioctl_compat NULL
2655#endif
2656
2657static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2658{
2659 struct snd_pcm_oss_file *pcm_oss_file;
2660 struct snd_pcm_substream *substream;
2661
2662 pcm_oss_file = file->private_data;
2663 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2664 if (substream == NULL)
2665 return -ENXIO;
2666 substream->f_flags = file->f_flags & O_NONBLOCK;
2667#ifndef OSS_DEBUG
2668 return snd_pcm_oss_read1(substream, buf, count);
2669#else
2670 {
2671 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2672 pcm_dbg(substream->pcm,
2673 "pcm_oss: read %li bytes (returned %li bytes)\n",
2674 (long)count, (long)res);
2675 return res;
2676 }
2677#endif
2678}
2679
2680static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2681{
2682 struct snd_pcm_oss_file *pcm_oss_file;
2683 struct snd_pcm_substream *substream;
2684 long result;
2685
2686 pcm_oss_file = file->private_data;
2687 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2688 if (substream == NULL)
2689 return -ENXIO;
2690 substream->f_flags = file->f_flags & O_NONBLOCK;
2691 result = snd_pcm_oss_write1(substream, buf, count);
2692#ifdef OSS_DEBUG
2693 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2694 (long)count, (long)result);
2695#endif
2696 return result;
2697}
2698
2699static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2700{
2701 struct snd_pcm_runtime *runtime = substream->runtime;
2702 if (atomic_read(&substream->mmap_count))
2703 return runtime->oss.prev_hw_ptr_period !=
2704 get_hw_ptr_period(runtime);
2705 else
2706 return snd_pcm_playback_avail(runtime) >=
2707 runtime->oss.period_frames;
2708}
2709
2710static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2711{
2712 struct snd_pcm_runtime *runtime = substream->runtime;
2713 if (atomic_read(&substream->mmap_count))
2714 return runtime->oss.prev_hw_ptr_period !=
2715 get_hw_ptr_period(runtime);
2716 else
2717 return snd_pcm_capture_avail(runtime) >=
2718 runtime->oss.period_frames;
2719}
2720
2721static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2722{
2723 struct snd_pcm_oss_file *pcm_oss_file;
2724 unsigned int mask;
2725 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2726
2727 pcm_oss_file = file->private_data;
2728
2729 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2730 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2731
2732 mask = 0;
2733 if (psubstream != NULL) {
2734 struct snd_pcm_runtime *runtime = psubstream->runtime;
2735 poll_wait(file, &runtime->sleep, wait);
2736 snd_pcm_stream_lock_irq(psubstream);
2737 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2738 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2739 snd_pcm_oss_playback_ready(psubstream)))
2740 mask |= POLLOUT | POLLWRNORM;
2741 snd_pcm_stream_unlock_irq(psubstream);
2742 }
2743 if (csubstream != NULL) {
2744 struct snd_pcm_runtime *runtime = csubstream->runtime;
2745 snd_pcm_state_t ostate;
2746 poll_wait(file, &runtime->sleep, wait);
2747 snd_pcm_stream_lock_irq(csubstream);
2748 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2749 snd_pcm_oss_capture_ready(csubstream))
2750 mask |= POLLIN | POLLRDNORM;
2751 snd_pcm_stream_unlock_irq(csubstream);
2752 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2753 struct snd_pcm_oss_file ofile;
2754 memset(&ofile, 0, sizeof(ofile));
2755 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2756 runtime->oss.trigger = 0;
2757 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2758 }
2759 }
2760
2761 return mask;
2762}
2763
2764static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2765{
2766 struct snd_pcm_oss_file *pcm_oss_file;
2767 struct snd_pcm_substream *substream = NULL;
2768 struct snd_pcm_runtime *runtime;
2769 int err;
2770
2771#ifdef OSS_DEBUG
2772 pr_debug("pcm_oss: mmap begin\n");
2773#endif
2774 pcm_oss_file = file->private_data;
2775 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2776 case VM_READ | VM_WRITE:
2777 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2778 if (substream)
2779 break;
2780 /* Fall through */
2781 case VM_READ:
2782 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2783 break;
2784 case VM_WRITE:
2785 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2786 break;
2787 default:
2788 return -EINVAL;
2789 }
2790 /* set VM_READ access as well to fix memset() routines that do
2791 reads before writes (to improve performance) */
2792 area->vm_flags |= VM_READ;
2793 if (substream == NULL)
2794 return -ENXIO;
2795 runtime = substream->runtime;
2796 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2797 return -EIO;
2798 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2799 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2800 else
2801 return -EIO;
2802
2803 if (runtime->oss.params) {
2804 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2805 return err;
2806 }
2807#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2808 if (runtime->oss.plugin_first != NULL)
2809 return -EIO;
2810#endif
2811
2812 if (area->vm_pgoff != 0)
2813 return -EINVAL;
2814
2815 err = snd_pcm_mmap_data(substream, file, area);
2816 if (err < 0)
2817 return err;
2818 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2819 runtime->silence_threshold = 0;
2820 runtime->silence_size = 0;
2821#ifdef OSS_DEBUG
2822 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2823 runtime->oss.mmap_bytes);
2824#endif
2825 /* In mmap mode we never stop */
2826 runtime->stop_threshold = runtime->boundary;
2827
2828 return 0;
2829}
2830
2831#ifdef CONFIG_SND_VERBOSE_PROCFS
2832/*
2833 * /proc interface
2834 */
2835
2836static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2837 struct snd_info_buffer *buffer)
2838{
2839 struct snd_pcm_str *pstr = entry->private_data;
2840 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2841 mutex_lock(&pstr->oss.setup_mutex);
2842 while (setup) {
2843 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2844 setup->task_name,
2845 setup->periods,
2846 setup->period_size,
2847 setup->disable ? " disable" : "",
2848 setup->direct ? " direct" : "",
2849 setup->block ? " block" : "",
2850 setup->nonblock ? " non-block" : "",
2851 setup->partialfrag ? " partial-frag" : "",
2852 setup->nosilence ? " no-silence" : "");
2853 setup = setup->next;
2854 }
2855 mutex_unlock(&pstr->oss.setup_mutex);
2856}
2857
2858static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2859{
2860 struct snd_pcm_oss_setup *setup, *setupn;
2861
2862 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2863 setup; setup = setupn) {
2864 setupn = setup->next;
2865 kfree(setup->task_name);
2866 kfree(setup);
2867 }
2868 pstr->oss.setup_list = NULL;
2869}
2870
2871static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2872 struct snd_info_buffer *buffer)
2873{
2874 struct snd_pcm_str *pstr = entry->private_data;
2875 char line[128], str[32], task_name[32];
2876 const char *ptr;
2877 int idx1;
2878 struct snd_pcm_oss_setup *setup, *setup1, template;
2879
2880 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2881 mutex_lock(&pstr->oss.setup_mutex);
2882 memset(&template, 0, sizeof(template));
2883 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2884 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2885 snd_pcm_oss_proc_free_setup_list(pstr);
2886 mutex_unlock(&pstr->oss.setup_mutex);
2887 continue;
2888 }
2889 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2890 if (!strcmp(setup->task_name, task_name)) {
2891 template = *setup;
2892 break;
2893 }
2894 }
2895 ptr = snd_info_get_str(str, ptr, sizeof(str));
2896 template.periods = simple_strtoul(str, NULL, 10);
2897 ptr = snd_info_get_str(str, ptr, sizeof(str));
2898 template.period_size = simple_strtoul(str, NULL, 10);
2899 for (idx1 = 31; idx1 >= 0; idx1--)
2900 if (template.period_size & (1 << idx1))
2901 break;
2902 for (idx1--; idx1 >= 0; idx1--)
2903 template.period_size &= ~(1 << idx1);
2904 do {
2905 ptr = snd_info_get_str(str, ptr, sizeof(str));
2906 if (!strcmp(str, "disable")) {
2907 template.disable = 1;
2908 } else if (!strcmp(str, "direct")) {
2909 template.direct = 1;
2910 } else if (!strcmp(str, "block")) {
2911 template.block = 1;
2912 } else if (!strcmp(str, "non-block")) {
2913 template.nonblock = 1;
2914 } else if (!strcmp(str, "partial-frag")) {
2915 template.partialfrag = 1;
2916 } else if (!strcmp(str, "no-silence")) {
2917 template.nosilence = 1;
2918 } else if (!strcmp(str, "buggy-ptr")) {
2919 template.buggyptr = 1;
2920 }
2921 } while (*str);
2922 if (setup == NULL) {
2923 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2924 if (! setup) {
2925 buffer->error = -ENOMEM;
2926 mutex_unlock(&pstr->oss.setup_mutex);
2927 return;
2928 }
2929 if (pstr->oss.setup_list == NULL)
2930 pstr->oss.setup_list = setup;
2931 else {
2932 for (setup1 = pstr->oss.setup_list;
2933 setup1->next; setup1 = setup1->next);
2934 setup1->next = setup;
2935 }
2936 template.task_name = kstrdup(task_name, GFP_KERNEL);
2937 if (! template.task_name) {
2938 kfree(setup);
2939 buffer->error = -ENOMEM;
2940 mutex_unlock(&pstr->oss.setup_mutex);
2941 return;
2942 }
2943 }
2944 *setup = template;
2945 mutex_unlock(&pstr->oss.setup_mutex);
2946 }
2947}
2948
2949static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2950{
2951 int stream;
2952 for (stream = 0; stream < 2; ++stream) {
2953 struct snd_info_entry *entry;
2954 struct snd_pcm_str *pstr = &pcm->streams[stream];
2955 if (pstr->substream_count == 0)
2956 continue;
2957 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2958 entry->content = SNDRV_INFO_CONTENT_TEXT;
2959 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2960 entry->c.text.read = snd_pcm_oss_proc_read;
2961 entry->c.text.write = snd_pcm_oss_proc_write;
2962 entry->private_data = pstr;
2963 if (snd_info_register(entry) < 0) {
2964 snd_info_free_entry(entry);
2965 entry = NULL;
2966 }
2967 }
2968 pstr->oss.proc_entry = entry;
2969 }
2970}
2971
2972static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2973{
2974 int stream;
2975 for (stream = 0; stream < 2; ++stream) {
2976 struct snd_pcm_str *pstr = &pcm->streams[stream];
2977 snd_info_free_entry(pstr->oss.proc_entry);
2978 pstr->oss.proc_entry = NULL;
2979 snd_pcm_oss_proc_free_setup_list(pstr);
2980 }
2981}
2982#else /* !CONFIG_SND_VERBOSE_PROCFS */
2983#define snd_pcm_oss_proc_init(pcm)
2984#define snd_pcm_oss_proc_done(pcm)
2985#endif /* CONFIG_SND_VERBOSE_PROCFS */
2986
2987/*
2988 * ENTRY functions
2989 */
2990
2991static const struct file_operations snd_pcm_oss_f_reg =
2992{
2993 .owner = THIS_MODULE,
2994 .read = snd_pcm_oss_read,
2995 .write = snd_pcm_oss_write,
2996 .open = snd_pcm_oss_open,
2997 .release = snd_pcm_oss_release,
2998 .llseek = no_llseek,
2999 .poll = snd_pcm_oss_poll,
3000 .unlocked_ioctl = snd_pcm_oss_ioctl,
3001 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3002 .mmap = snd_pcm_oss_mmap,
3003};
3004
3005static void register_oss_dsp(struct snd_pcm *pcm, int index)
3006{
3007 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3008 pcm->card, index, &snd_pcm_oss_f_reg,
3009 pcm) < 0) {
3010 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3011 pcm->card->number, pcm->device);
3012 }
3013}
3014
3015static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3016{
3017 pcm->oss.reg = 0;
3018 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3019 char name[128];
3020 int duplex;
3021 register_oss_dsp(pcm, 0);
3022 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3023 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3024 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3025 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3026#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3027 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3028 pcm->card->number,
3029 name);
3030#endif
3031 pcm->oss.reg++;
3032 pcm->oss.reg_mask |= 1;
3033 }
3034 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3035 register_oss_dsp(pcm, 1);
3036 pcm->oss.reg++;
3037 pcm->oss.reg_mask |= 2;
3038 }
3039
3040 if (pcm->oss.reg)
3041 snd_pcm_oss_proc_init(pcm);
3042
3043 return 0;
3044}
3045
3046static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3047{
3048 if (pcm->oss.reg) {
3049 if (pcm->oss.reg_mask & 1) {
3050 pcm->oss.reg_mask &= ~1;
3051 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3052 pcm->card, 0);
3053 }
3054 if (pcm->oss.reg_mask & 2) {
3055 pcm->oss.reg_mask &= ~2;
3056 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3057 pcm->card, 1);
3058 }
3059 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3060#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3061 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3062#endif
3063 }
3064 pcm->oss.reg = 0;
3065 }
3066 return 0;
3067}
3068
3069static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3070{
3071 snd_pcm_oss_disconnect_minor(pcm);
3072 snd_pcm_oss_proc_done(pcm);
3073 return 0;
3074}
3075
3076static struct snd_pcm_notify snd_pcm_oss_notify =
3077{
3078 .n_register = snd_pcm_oss_register_minor,
3079 .n_disconnect = snd_pcm_oss_disconnect_minor,
3080 .n_unregister = snd_pcm_oss_unregister_minor,
3081};
3082
3083static int __init alsa_pcm_oss_init(void)
3084{
3085 int i;
3086 int err;
3087
3088 /* check device map table */
3089 for (i = 0; i < SNDRV_CARDS; i++) {
3090 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3091 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3092 i, dsp_map[i]);
3093 dsp_map[i] = 0;
3094 }
3095 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3096 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3097 i, adsp_map[i]);
3098 adsp_map[i] = 1;
3099 }
3100 }
3101 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3102 return err;
3103 return 0;
3104}
3105
3106static void __exit alsa_pcm_oss_exit(void)
3107{
3108 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3109}
3110
3111module_init(alsa_pcm_oss_init)
3112module_exit(alsa_pcm_oss_exit)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Digital Audio (PCM) abstract layer / OSS compatible
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 */
6
7#if 0
8#define PLUGIN_DEBUG
9#endif
10#if 0
11#define OSS_DEBUG
12#endif
13
14#include <linux/init.h>
15#include <linux/slab.h>
16#include <linux/sched/signal.h>
17#include <linux/time.h>
18#include <linux/vmalloc.h>
19#include <linux/module.h>
20#include <linux/math64.h>
21#include <linux/string.h>
22#include <linux/compat.h>
23#include <sound/core.h>
24#include <sound/minors.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include "pcm_plugin.h"
28#include <sound/info.h>
29#include <linux/soundcard.h>
30#include <sound/initval.h>
31#include <sound/mixer_oss.h>
32
33#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
34
35static int dsp_map[SNDRV_CARDS];
36static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
37static bool nonblock_open = 1;
38
39MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
40MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
41MODULE_LICENSE("GPL");
42module_param_array(dsp_map, int, NULL, 0444);
43MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
44module_param_array(adsp_map, int, NULL, 0444);
45MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
46module_param(nonblock_open, bool, 0644);
47MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
48MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
49MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
50
51static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
52static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
53static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
54
55/*
56 * helper functions to process hw_params
57 */
58static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
59{
60 int changed = 0;
61 if (i->min < min) {
62 i->min = min;
63 i->openmin = openmin;
64 changed = 1;
65 } else if (i->min == min && !i->openmin && openmin) {
66 i->openmin = 1;
67 changed = 1;
68 }
69 if (i->integer) {
70 if (i->openmin) {
71 i->min++;
72 i->openmin = 0;
73 }
74 }
75 if (snd_interval_checkempty(i)) {
76 snd_interval_none(i);
77 return -EINVAL;
78 }
79 return changed;
80}
81
82static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
83{
84 int changed = 0;
85 if (i->max > max) {
86 i->max = max;
87 i->openmax = openmax;
88 changed = 1;
89 } else if (i->max == max && !i->openmax && openmax) {
90 i->openmax = 1;
91 changed = 1;
92 }
93 if (i->integer) {
94 if (i->openmax) {
95 i->max--;
96 i->openmax = 0;
97 }
98 }
99 if (snd_interval_checkempty(i)) {
100 snd_interval_none(i);
101 return -EINVAL;
102 }
103 return changed;
104}
105
106static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
107{
108 struct snd_interval t;
109 t.empty = 0;
110 t.min = t.max = val;
111 t.openmin = t.openmax = 0;
112 t.integer = 1;
113 return snd_interval_refine(i, &t);
114}
115
116/**
117 * snd_pcm_hw_param_value_min
118 * @params: the hw_params instance
119 * @var: parameter to retrieve
120 * @dir: pointer to the direction (-1,0,1) or NULL
121 *
122 * Return the minimum value for field PAR.
123 */
124static unsigned int
125snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
126 snd_pcm_hw_param_t var, int *dir)
127{
128 if (hw_is_mask(var)) {
129 if (dir)
130 *dir = 0;
131 return snd_mask_min(hw_param_mask_c(params, var));
132 }
133 if (hw_is_interval(var)) {
134 const struct snd_interval *i = hw_param_interval_c(params, var);
135 if (dir)
136 *dir = i->openmin;
137 return snd_interval_min(i);
138 }
139 return -EINVAL;
140}
141
142/**
143 * snd_pcm_hw_param_value_max
144 * @params: the hw_params instance
145 * @var: parameter to retrieve
146 * @dir: pointer to the direction (-1,0,1) or NULL
147 *
148 * Return the maximum value for field PAR.
149 */
150static int
151snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
152 snd_pcm_hw_param_t var, int *dir)
153{
154 if (hw_is_mask(var)) {
155 if (dir)
156 *dir = 0;
157 return snd_mask_max(hw_param_mask_c(params, var));
158 }
159 if (hw_is_interval(var)) {
160 const struct snd_interval *i = hw_param_interval_c(params, var);
161 if (dir)
162 *dir = - (int) i->openmax;
163 return snd_interval_max(i);
164 }
165 return -EINVAL;
166}
167
168static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
169 snd_pcm_hw_param_t var,
170 const struct snd_mask *val)
171{
172 int changed;
173 changed = snd_mask_refine(hw_param_mask(params, var), val);
174 if (changed > 0) {
175 params->cmask |= 1 << var;
176 params->rmask |= 1 << var;
177 }
178 return changed;
179}
180
181static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
182 struct snd_pcm_hw_params *params,
183 snd_pcm_hw_param_t var,
184 const struct snd_mask *val)
185{
186 int changed = _snd_pcm_hw_param_mask(params, var, val);
187 if (changed < 0)
188 return changed;
189 if (params->rmask) {
190 int err = snd_pcm_hw_refine(pcm, params);
191 if (err < 0)
192 return err;
193 }
194 return 0;
195}
196
197static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var, unsigned int val,
199 int dir)
200{
201 int changed;
202 int open = 0;
203 if (dir) {
204 if (dir > 0) {
205 open = 1;
206 } else if (dir < 0) {
207 if (val > 0) {
208 open = 1;
209 val--;
210 }
211 }
212 }
213 if (hw_is_mask(var))
214 changed = snd_mask_refine_min(hw_param_mask(params, var),
215 val + !!open);
216 else if (hw_is_interval(var))
217 changed = snd_interval_refine_min(hw_param_interval(params, var),
218 val, open);
219 else
220 return -EINVAL;
221 if (changed > 0) {
222 params->cmask |= 1 << var;
223 params->rmask |= 1 << var;
224 }
225 return changed;
226}
227
228/**
229 * snd_pcm_hw_param_min
230 * @pcm: PCM instance
231 * @params: the hw_params instance
232 * @var: parameter to retrieve
233 * @val: minimal value
234 * @dir: pointer to the direction (-1,0,1) or NULL
235 *
236 * Inside configuration space defined by PARAMS remove from PAR all
237 * values < VAL. Reduce configuration space accordingly.
238 * Return new minimum or -EINVAL if the configuration space is empty
239 */
240static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
241 struct snd_pcm_hw_params *params,
242 snd_pcm_hw_param_t var, unsigned int val,
243 int *dir)
244{
245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
246 if (changed < 0)
247 return changed;
248 if (params->rmask) {
249 int err = snd_pcm_hw_refine(pcm, params);
250 if (err < 0)
251 return err;
252 }
253 return snd_pcm_hw_param_value_min(params, var, dir);
254}
255
256static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int dir)
259{
260 int changed;
261 int open = 0;
262 if (dir) {
263 if (dir < 0) {
264 open = 1;
265 } else if (dir > 0) {
266 open = 1;
267 val++;
268 }
269 }
270 if (hw_is_mask(var)) {
271 if (val == 0 && open) {
272 snd_mask_none(hw_param_mask(params, var));
273 changed = -EINVAL;
274 } else
275 changed = snd_mask_refine_max(hw_param_mask(params, var),
276 val - !!open);
277 } else if (hw_is_interval(var))
278 changed = snd_interval_refine_max(hw_param_interval(params, var),
279 val, open);
280 else
281 return -EINVAL;
282 if (changed > 0) {
283 params->cmask |= 1 << var;
284 params->rmask |= 1 << var;
285 }
286 return changed;
287}
288
289/**
290 * snd_pcm_hw_param_max
291 * @pcm: PCM instance
292 * @params: the hw_params instance
293 * @var: parameter to retrieve
294 * @val: maximal value
295 * @dir: pointer to the direction (-1,0,1) or NULL
296 *
297 * Inside configuration space defined by PARAMS remove from PAR all
298 * values >= VAL + 1. Reduce configuration space accordingly.
299 * Return new maximum or -EINVAL if the configuration space is empty
300 */
301static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
302 struct snd_pcm_hw_params *params,
303 snd_pcm_hw_param_t var, unsigned int val,
304 int *dir)
305{
306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
307 if (changed < 0)
308 return changed;
309 if (params->rmask) {
310 int err = snd_pcm_hw_refine(pcm, params);
311 if (err < 0)
312 return err;
313 }
314 return snd_pcm_hw_param_value_max(params, var, dir);
315}
316
317static int boundary_sub(int a, int adir,
318 int b, int bdir,
319 int *c, int *cdir)
320{
321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
323 *c = a - b;
324 *cdir = adir - bdir;
325 if (*cdir == -2) {
326 (*c)--;
327 } else if (*cdir == 2) {
328 (*c)++;
329 }
330 return 0;
331}
332
333static int boundary_lt(unsigned int a, int adir,
334 unsigned int b, int bdir)
335{
336 if (adir < 0) {
337 a--;
338 adir = 1;
339 } else if (adir > 0)
340 adir = 1;
341 if (bdir < 0) {
342 b--;
343 bdir = 1;
344 } else if (bdir > 0)
345 bdir = 1;
346 return a < b || (a == b && adir < bdir);
347}
348
349/* Return 1 if min is nearer to best than max */
350static int boundary_nearer(int min, int mindir,
351 int best, int bestdir,
352 int max, int maxdir)
353{
354 int dmin, dmindir;
355 int dmax, dmaxdir;
356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
358 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
359}
360
361/**
362 * snd_pcm_hw_param_near
363 * @pcm: PCM instance
364 * @params: the hw_params instance
365 * @var: parameter to retrieve
366 * @best: value to set
367 * @dir: pointer to the direction (-1,0,1) or NULL
368 *
369 * Inside configuration space defined by PARAMS set PAR to the available value
370 * nearest to VAL. Reduce configuration space accordingly.
371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
373 * Return the value found.
374 */
375static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
376 struct snd_pcm_hw_params *params,
377 snd_pcm_hw_param_t var, unsigned int best,
378 int *dir)
379{
380 struct snd_pcm_hw_params *save __free(kfree) = NULL;
381 int v;
382 unsigned int saved_min;
383 int last = 0;
384 int min, max;
385 int mindir, maxdir;
386 int valdir = dir ? *dir : 0;
387 /* FIXME */
388 if (best > INT_MAX)
389 best = INT_MAX;
390 min = max = best;
391 mindir = maxdir = valdir;
392 if (maxdir > 0)
393 maxdir = 0;
394 else if (maxdir == 0)
395 maxdir = -1;
396 else {
397 maxdir = 1;
398 max--;
399 }
400 save = kmalloc(sizeof(*save), GFP_KERNEL);
401 if (save == NULL)
402 return -ENOMEM;
403 *save = *params;
404 saved_min = min;
405 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
406 if (min >= 0) {
407 struct snd_pcm_hw_params *params1 __free(kfree) = NULL;
408 if (max < 0)
409 goto _end;
410 if ((unsigned int)min == saved_min && mindir == valdir)
411 goto _end;
412 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
413 if (params1 == NULL)
414 return -ENOMEM;
415 *params1 = *save;
416 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
417 if (max < 0)
418 goto _end;
419 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
420 *params = *params1;
421 last = 1;
422 }
423 } else {
424 *params = *save;
425 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
426 if (max < 0)
427 return max;
428 last = 1;
429 }
430 _end:
431 if (last)
432 v = snd_pcm_hw_param_last(pcm, params, var, dir);
433 else
434 v = snd_pcm_hw_param_first(pcm, params, var, dir);
435 return v;
436}
437
438static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
439 snd_pcm_hw_param_t var, unsigned int val,
440 int dir)
441{
442 int changed;
443 if (hw_is_mask(var)) {
444 struct snd_mask *m = hw_param_mask(params, var);
445 if (val == 0 && dir < 0) {
446 changed = -EINVAL;
447 snd_mask_none(m);
448 } else {
449 if (dir > 0)
450 val++;
451 else if (dir < 0)
452 val--;
453 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
454 }
455 } else if (hw_is_interval(var)) {
456 struct snd_interval *i = hw_param_interval(params, var);
457 if (val == 0 && dir < 0) {
458 changed = -EINVAL;
459 snd_interval_none(i);
460 } else if (dir == 0)
461 changed = snd_interval_refine_set(i, val);
462 else {
463 struct snd_interval t;
464 t.openmin = 1;
465 t.openmax = 1;
466 t.empty = 0;
467 t.integer = 0;
468 if (dir < 0) {
469 t.min = val - 1;
470 t.max = val;
471 } else {
472 t.min = val;
473 t.max = val+1;
474 }
475 changed = snd_interval_refine(i, &t);
476 }
477 } else
478 return -EINVAL;
479 if (changed > 0) {
480 params->cmask |= 1 << var;
481 params->rmask |= 1 << var;
482 }
483 return changed;
484}
485
486/**
487 * snd_pcm_hw_param_set
488 * @pcm: PCM instance
489 * @params: the hw_params instance
490 * @var: parameter to retrieve
491 * @val: value to set
492 * @dir: pointer to the direction (-1,0,1) or NULL
493 *
494 * Inside configuration space defined by PARAMS remove from PAR all
495 * values != VAL. Reduce configuration space accordingly.
496 * Return VAL or -EINVAL if the configuration space is empty
497 */
498static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
499 struct snd_pcm_hw_params *params,
500 snd_pcm_hw_param_t var, unsigned int val,
501 int dir)
502{
503 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
504 if (changed < 0)
505 return changed;
506 if (params->rmask) {
507 int err = snd_pcm_hw_refine(pcm, params);
508 if (err < 0)
509 return err;
510 }
511 return snd_pcm_hw_param_value(params, var, NULL);
512}
513
514static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
515 snd_pcm_hw_param_t var)
516{
517 int changed;
518 changed = snd_interval_setinteger(hw_param_interval(params, var));
519 if (changed > 0) {
520 params->cmask |= 1 << var;
521 params->rmask |= 1 << var;
522 }
523 return changed;
524}
525
526/*
527 * plugin
528 */
529
530#ifdef CONFIG_SND_PCM_OSS_PLUGINS
531static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
532{
533 struct snd_pcm_runtime *runtime = substream->runtime;
534 struct snd_pcm_plugin *plugin, *next;
535
536 plugin = runtime->oss.plugin_first;
537 while (plugin) {
538 next = plugin->next;
539 snd_pcm_plugin_free(plugin);
540 plugin = next;
541 }
542 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
543 return 0;
544}
545
546static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
547{
548 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
549 plugin->next = runtime->oss.plugin_first;
550 plugin->prev = NULL;
551 if (runtime->oss.plugin_first) {
552 runtime->oss.plugin_first->prev = plugin;
553 runtime->oss.plugin_first = plugin;
554 } else {
555 runtime->oss.plugin_last =
556 runtime->oss.plugin_first = plugin;
557 }
558 return 0;
559}
560
561int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
562{
563 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
564 plugin->next = NULL;
565 plugin->prev = runtime->oss.plugin_last;
566 if (runtime->oss.plugin_last) {
567 runtime->oss.plugin_last->next = plugin;
568 runtime->oss.plugin_last = plugin;
569 } else {
570 runtime->oss.plugin_last =
571 runtime->oss.plugin_first = plugin;
572 }
573 return 0;
574}
575#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
576
577static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
578{
579 struct snd_pcm_runtime *runtime = substream->runtime;
580 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
581 long bytes = frames_to_bytes(runtime, frames);
582 if (buffer_size == runtime->oss.buffer_bytes)
583 return bytes;
584#if BITS_PER_LONG >= 64
585 return runtime->oss.buffer_bytes * bytes / buffer_size;
586#else
587 {
588 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
589 return div_u64(bsize, buffer_size);
590 }
591#endif
592}
593
594static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
595{
596 struct snd_pcm_runtime *runtime = substream->runtime;
597 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
598 if (buffer_size == runtime->oss.buffer_bytes)
599 return bytes_to_frames(runtime, bytes);
600 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
601}
602
603static inline
604snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
605{
606 return runtime->hw_ptr_interrupt;
607}
608
609/* define extended formats in the recent OSS versions (if any) */
610/* linear formats */
611#define AFMT_S32_LE 0x00001000
612#define AFMT_S32_BE 0x00002000
613#define AFMT_S24_LE 0x00008000
614#define AFMT_S24_BE 0x00010000
615#define AFMT_S24_PACKED 0x00040000
616
617/* other supported formats */
618#define AFMT_FLOAT 0x00004000
619#define AFMT_SPDIF_RAW 0x00020000
620
621/* unsupported formats */
622#define AFMT_AC3 0x00000400
623#define AFMT_VORBIS 0x00000800
624
625static snd_pcm_format_t snd_pcm_oss_format_from(int format)
626{
627 switch (format) {
628 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
629 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
630 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
631 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
632 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
633 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
634 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
635 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
636 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
637 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
638 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
639 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
640 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
641 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
642 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
643 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
644 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
645 default: return SNDRV_PCM_FORMAT_U8;
646 }
647}
648
649static int snd_pcm_oss_format_to(snd_pcm_format_t format)
650{
651 switch (format) {
652 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
653 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
654 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
655 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
656 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
657 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
658 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
659 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
660 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
661 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
662 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
663 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
664 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
665 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
666 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
667 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
668 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
669 default: return -EINVAL;
670 }
671}
672
673static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
674 struct snd_pcm_hw_params *oss_params,
675 struct snd_pcm_hw_params *slave_params)
676{
677 ssize_t s;
678 ssize_t oss_buffer_size;
679 ssize_t oss_period_size, oss_periods;
680 ssize_t min_period_size, max_period_size;
681 struct snd_pcm_runtime *runtime = substream->runtime;
682 size_t oss_frame_size;
683
684 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
685 params_channels(oss_params) / 8;
686
687 oss_buffer_size = snd_pcm_hw_param_value_max(slave_params,
688 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
689 NULL);
690 if (oss_buffer_size <= 0)
691 return -EINVAL;
692 oss_buffer_size = snd_pcm_plug_client_size(substream,
693 oss_buffer_size * oss_frame_size);
694 if (oss_buffer_size <= 0)
695 return -EINVAL;
696 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
697 if (atomic_read(&substream->mmap_count)) {
698 if (oss_buffer_size > runtime->oss.mmap_bytes)
699 oss_buffer_size = runtime->oss.mmap_bytes;
700 }
701
702 if (substream->oss.setup.period_size > 16)
703 oss_period_size = substream->oss.setup.period_size;
704 else if (runtime->oss.fragshift) {
705 oss_period_size = 1 << runtime->oss.fragshift;
706 if (oss_period_size > oss_buffer_size / 2)
707 oss_period_size = oss_buffer_size / 2;
708 } else {
709 int sd;
710 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
711
712 oss_period_size = oss_buffer_size;
713 do {
714 oss_period_size /= 2;
715 } while (oss_period_size > bytes_per_sec);
716 if (runtime->oss.subdivision == 0) {
717 sd = 4;
718 if (oss_period_size / sd > 4096)
719 sd *= 2;
720 if (oss_period_size / sd < 4096)
721 sd = 1;
722 } else
723 sd = runtime->oss.subdivision;
724 oss_period_size /= sd;
725 if (oss_period_size < 16)
726 oss_period_size = 16;
727 }
728
729 min_period_size = snd_pcm_plug_client_size(substream,
730 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
731 if (min_period_size > 0) {
732 min_period_size *= oss_frame_size;
733 min_period_size = roundup_pow_of_two(min_period_size);
734 if (oss_period_size < min_period_size)
735 oss_period_size = min_period_size;
736 }
737
738 max_period_size = snd_pcm_plug_client_size(substream,
739 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
740 if (max_period_size > 0) {
741 max_period_size *= oss_frame_size;
742 max_period_size = rounddown_pow_of_two(max_period_size);
743 if (oss_period_size > max_period_size)
744 oss_period_size = max_period_size;
745 }
746
747 oss_periods = oss_buffer_size / oss_period_size;
748
749 if (substream->oss.setup.periods > 1)
750 oss_periods = substream->oss.setup.periods;
751
752 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
753 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
754 s = runtime->oss.maxfrags;
755 if (oss_periods > s)
756 oss_periods = s;
757
758 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
759 if (s < 2)
760 s = 2;
761 if (oss_periods < s)
762 oss_periods = s;
763
764 while (oss_period_size * oss_periods > oss_buffer_size)
765 oss_period_size /= 2;
766
767 if (oss_period_size < 16)
768 return -EINVAL;
769
770 /* don't allocate too large period; 1MB period must be enough */
771 if (oss_period_size > 1024 * 1024)
772 return -ENOMEM;
773
774 runtime->oss.period_bytes = oss_period_size;
775 runtime->oss.period_frames = 1;
776 runtime->oss.periods = oss_periods;
777 return 0;
778}
779
780static int choose_rate(struct snd_pcm_substream *substream,
781 struct snd_pcm_hw_params *params, unsigned int best_rate)
782{
783 const struct snd_interval *it;
784 struct snd_pcm_hw_params *save __free(kfree) = NULL;
785 unsigned int rate, prev;
786
787 save = kmalloc(sizeof(*save), GFP_KERNEL);
788 if (save == NULL)
789 return -ENOMEM;
790 *save = *params;
791 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
792
793 /* try multiples of the best rate */
794 rate = best_rate;
795 for (;;) {
796 if (it->max < rate || (it->max == rate && it->openmax))
797 break;
798 if (it->min < rate || (it->min == rate && !it->openmin)) {
799 int ret;
800 ret = snd_pcm_hw_param_set(substream, params,
801 SNDRV_PCM_HW_PARAM_RATE,
802 rate, 0);
803 if (ret == (int)rate)
804 return rate;
805 *params = *save;
806 }
807 prev = rate;
808 rate += best_rate;
809 if (rate <= prev)
810 break;
811 }
812
813 /* not found, use the nearest rate */
814 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
815}
816
817/* parameter locking: returns immediately if tried during streaming */
818static int lock_params(struct snd_pcm_runtime *runtime)
819{
820 if (mutex_lock_interruptible(&runtime->oss.params_lock))
821 return -ERESTARTSYS;
822 if (atomic_read(&runtime->oss.rw_ref)) {
823 mutex_unlock(&runtime->oss.params_lock);
824 return -EBUSY;
825 }
826 return 0;
827}
828
829static void unlock_params(struct snd_pcm_runtime *runtime)
830{
831 mutex_unlock(&runtime->oss.params_lock);
832}
833
834static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream)
835{
836 struct snd_pcm_runtime *runtime = substream->runtime;
837
838 kvfree(runtime->oss.buffer);
839 runtime->oss.buffer = NULL;
840#ifdef CONFIG_SND_PCM_OSS_PLUGINS
841 snd_pcm_oss_plugin_clear(substream);
842#endif
843}
844
845/* call with params_lock held */
846static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
847{
848 struct snd_pcm_runtime *runtime = substream->runtime;
849 struct snd_pcm_hw_params *params, *sparams;
850 struct snd_pcm_sw_params *sw_params;
851 ssize_t oss_buffer_size, oss_period_size;
852 size_t oss_frame_size;
853 int err;
854 int direct;
855 snd_pcm_format_t format, sformat;
856 int n;
857 const struct snd_mask *sformat_mask;
858 struct snd_mask mask;
859
860 if (!runtime->oss.params)
861 return 0;
862 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
863 params = kmalloc(sizeof(*params), GFP_KERNEL);
864 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
865 if (!sw_params || !params || !sparams) {
866 err = -ENOMEM;
867 goto failure;
868 }
869
870 if (atomic_read(&substream->mmap_count))
871 direct = 1;
872 else
873 direct = substream->oss.setup.direct;
874
875 _snd_pcm_hw_params_any(sparams);
876 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
877 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
878 snd_mask_none(&mask);
879 if (atomic_read(&substream->mmap_count))
880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
881 else {
882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
883 if (!direct)
884 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
885 }
886 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
887 if (err < 0) {
888 pcm_dbg(substream->pcm, "No usable accesses\n");
889 err = -EINVAL;
890 goto failure;
891 }
892
893 err = choose_rate(substream, sparams, runtime->oss.rate);
894 if (err < 0)
895 goto failure;
896 err = snd_pcm_hw_param_near(substream, sparams,
897 SNDRV_PCM_HW_PARAM_CHANNELS,
898 runtime->oss.channels, NULL);
899 if (err < 0)
900 goto failure;
901
902 format = snd_pcm_oss_format_from(runtime->oss.format);
903
904 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
905 if (direct)
906 sformat = format;
907 else
908 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
909
910 if ((__force int)sformat < 0 ||
911 !snd_mask_test_format(sformat_mask, sformat)) {
912 pcm_for_each_format(sformat) {
913 if (snd_mask_test_format(sformat_mask, sformat) &&
914 snd_pcm_oss_format_to(sformat) >= 0)
915 goto format_found;
916 }
917 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
918 err = -EINVAL;
919 goto failure;
920 }
921 format_found:
922 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
923 if (err < 0)
924 goto failure;
925
926 if (direct) {
927 memcpy(params, sparams, sizeof(*params));
928 } else {
929 _snd_pcm_hw_params_any(params);
930 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
931 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
932 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
933 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
934 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
935 runtime->oss.channels, 0);
936 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
937 runtime->oss.rate, 0);
938 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
939 params_access(params), params_format(params),
940 params_channels(params), params_rate(params));
941 }
942 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
943 params_access(sparams), params_format(sparams),
944 params_channels(sparams), params_rate(sparams));
945
946 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
947 params_channels(params) / 8;
948
949 err = snd_pcm_oss_period_size(substream, params, sparams);
950 if (err < 0)
951 goto failure;
952
953 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
954 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
955 if (err < 0)
956 goto failure;
957
958 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
959 runtime->oss.periods, NULL);
960 if (err < 0)
961 goto failure;
962
963 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
964
965 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
966 if (err < 0) {
967 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
968 goto failure;
969 }
970
971#ifdef CONFIG_SND_PCM_OSS_PLUGINS
972 snd_pcm_oss_plugin_clear(substream);
973 if (!direct) {
974 /* add necessary plugins */
975 err = snd_pcm_plug_format_plugins(substream, params, sparams);
976 if (err < 0) {
977 pcm_dbg(substream->pcm,
978 "snd_pcm_plug_format_plugins failed: %i\n", err);
979 goto failure;
980 }
981 if (runtime->oss.plugin_first) {
982 struct snd_pcm_plugin *plugin;
983 err = snd_pcm_plugin_build_io(substream, sparams, &plugin);
984 if (err < 0) {
985 pcm_dbg(substream->pcm,
986 "snd_pcm_plugin_build_io failed: %i\n", err);
987 goto failure;
988 }
989 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
990 err = snd_pcm_plugin_append(plugin);
991 } else {
992 err = snd_pcm_plugin_insert(plugin);
993 }
994 if (err < 0)
995 goto failure;
996 }
997 }
998#endif
999
1000 if (runtime->oss.trigger) {
1001 sw_params->start_threshold = 1;
1002 } else {
1003 sw_params->start_threshold = runtime->boundary;
1004 }
1005 if (atomic_read(&substream->mmap_count) ||
1006 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1007 sw_params->stop_threshold = runtime->boundary;
1008 else
1009 sw_params->stop_threshold = runtime->buffer_size;
1010 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1011 sw_params->period_step = 1;
1012 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1013 1 : runtime->period_size;
1014 if (atomic_read(&substream->mmap_count) ||
1015 substream->oss.setup.nosilence) {
1016 sw_params->silence_threshold = 0;
1017 sw_params->silence_size = 0;
1018 } else {
1019 snd_pcm_uframes_t frames;
1020 frames = runtime->period_size + 16;
1021 if (frames > runtime->buffer_size)
1022 frames = runtime->buffer_size;
1023 sw_params->silence_threshold = frames;
1024 sw_params->silence_size = frames;
1025 }
1026
1027 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params);
1028 if (err < 0) {
1029 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1030 goto failure;
1031 }
1032
1033 runtime->oss.periods = params_periods(sparams);
1034 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1035 if (oss_period_size < 0) {
1036 err = -EINVAL;
1037 goto failure;
1038 }
1039#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1040 if (runtime->oss.plugin_first) {
1041 err = snd_pcm_plug_alloc(substream, oss_period_size);
1042 if (err < 0)
1043 goto failure;
1044 }
1045#endif
1046 oss_period_size = array_size(oss_period_size, oss_frame_size);
1047 oss_buffer_size = array_size(oss_period_size, runtime->oss.periods);
1048 if (oss_buffer_size <= 0) {
1049 err = -EINVAL;
1050 goto failure;
1051 }
1052
1053 runtime->oss.period_bytes = oss_period_size;
1054 runtime->oss.buffer_bytes = oss_buffer_size;
1055
1056 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1057 runtime->oss.period_bytes,
1058 runtime->oss.buffer_bytes);
1059 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1060 params_period_size(sparams),
1061 params_buffer_size(sparams));
1062
1063 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1064 runtime->oss.channels = params_channels(params);
1065 runtime->oss.rate = params_rate(params);
1066
1067 kvfree(runtime->oss.buffer);
1068 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1069 if (!runtime->oss.buffer) {
1070 err = -ENOMEM;
1071 goto failure;
1072 }
1073
1074 runtime->oss.params = 0;
1075 runtime->oss.prepare = 1;
1076 runtime->oss.buffer_used = 0;
1077 if (runtime->dma_area)
1078 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1079
1080 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1081
1082 err = 0;
1083failure:
1084 if (err)
1085 snd_pcm_oss_release_buffers(substream);
1086 kfree(sw_params);
1087 kfree(params);
1088 kfree(sparams);
1089 return err;
1090}
1091
1092/* this one takes the lock by itself */
1093static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1094 bool trylock)
1095{
1096 struct snd_pcm_runtime *runtime = substream->runtime;
1097 int err;
1098
1099 if (trylock) {
1100 if (!(mutex_trylock(&runtime->oss.params_lock)))
1101 return -EAGAIN;
1102 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1103 return -ERESTARTSYS;
1104
1105 err = snd_pcm_oss_change_params_locked(substream);
1106 mutex_unlock(&runtime->oss.params_lock);
1107 return err;
1108}
1109
1110static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1111{
1112 int idx, err;
1113 struct snd_pcm_substream *asubstream = NULL, *substream;
1114
1115 for (idx = 0; idx < 2; idx++) {
1116 substream = pcm_oss_file->streams[idx];
1117 if (substream == NULL)
1118 continue;
1119 if (asubstream == NULL)
1120 asubstream = substream;
1121 if (substream->runtime->oss.params) {
1122 err = snd_pcm_oss_change_params(substream, false);
1123 if (err < 0)
1124 return err;
1125 }
1126 }
1127 if (!asubstream)
1128 return -EIO;
1129 if (r_substream)
1130 *r_substream = asubstream;
1131 return 0;
1132}
1133
1134/* call with params_lock held */
1135/* NOTE: this always call PREPARE unconditionally no matter whether
1136 * runtime->oss.prepare is set or not
1137 */
1138static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1139{
1140 int err;
1141 struct snd_pcm_runtime *runtime = substream->runtime;
1142
1143 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1144 if (err < 0) {
1145 pcm_dbg(substream->pcm,
1146 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1147 return err;
1148 }
1149 runtime->oss.prepare = 0;
1150 runtime->oss.prev_hw_ptr_period = 0;
1151 runtime->oss.period_ptr = 0;
1152 runtime->oss.buffer_used = 0;
1153
1154 return 0;
1155}
1156
1157static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1158{
1159 struct snd_pcm_runtime *runtime;
1160 int err;
1161
1162 runtime = substream->runtime;
1163 if (runtime->oss.params) {
1164 err = snd_pcm_oss_change_params(substream, false);
1165 if (err < 0)
1166 return err;
1167 }
1168 if (runtime->oss.prepare) {
1169 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1170 return -ERESTARTSYS;
1171 err = snd_pcm_oss_prepare(substream);
1172 mutex_unlock(&runtime->oss.params_lock);
1173 if (err < 0)
1174 return err;
1175 }
1176 return 0;
1177}
1178
1179/* call with params_lock held */
1180static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1181{
1182 struct snd_pcm_runtime *runtime;
1183 int err;
1184
1185 runtime = substream->runtime;
1186 if (runtime->oss.params) {
1187 err = snd_pcm_oss_change_params_locked(substream);
1188 if (err < 0)
1189 return err;
1190 }
1191 if (runtime->oss.prepare) {
1192 err = snd_pcm_oss_prepare(substream);
1193 if (err < 0)
1194 return err;
1195 }
1196 return 0;
1197}
1198
1199static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1200{
1201 struct snd_pcm_runtime *runtime;
1202 snd_pcm_uframes_t frames;
1203 int err = 0;
1204
1205 while (1) {
1206 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1207 if (err < 0)
1208 break;
1209 runtime = substream->runtime;
1210 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1211 break;
1212 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1213 /* until avail(delay) <= buffer_size */
1214 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1215 frames /= runtime->period_size;
1216 frames *= runtime->period_size;
1217 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1218 if (err < 0)
1219 break;
1220 }
1221 return err;
1222}
1223
1224snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1225{
1226 struct snd_pcm_runtime *runtime = substream->runtime;
1227 int ret;
1228 while (1) {
1229 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1230 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1231#ifdef OSS_DEBUG
1232 pcm_dbg(substream->pcm,
1233 "pcm_oss: write: recovering from %s\n",
1234 runtime->state == SNDRV_PCM_STATE_XRUN ?
1235 "XRUN" : "SUSPEND");
1236#endif
1237 ret = snd_pcm_oss_prepare(substream);
1238 if (ret < 0)
1239 break;
1240 }
1241 mutex_unlock(&runtime->oss.params_lock);
1242 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1243 frames, in_kernel);
1244 mutex_lock(&runtime->oss.params_lock);
1245 if (ret != -EPIPE && ret != -ESTRPIPE)
1246 break;
1247 /* test, if we can't store new data, because the stream */
1248 /* has not been started */
1249 if (runtime->state == SNDRV_PCM_STATE_PREPARED)
1250 return -EAGAIN;
1251 }
1252 return ret;
1253}
1254
1255snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1256{
1257 struct snd_pcm_runtime *runtime = substream->runtime;
1258 snd_pcm_sframes_t delay;
1259 int ret;
1260 while (1) {
1261 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1262 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1263#ifdef OSS_DEBUG
1264 pcm_dbg(substream->pcm,
1265 "pcm_oss: read: recovering from %s\n",
1266 runtime->state == SNDRV_PCM_STATE_XRUN ?
1267 "XRUN" : "SUSPEND");
1268#endif
1269 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1270 if (ret < 0)
1271 break;
1272 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
1273 ret = snd_pcm_oss_prepare(substream);
1274 if (ret < 0)
1275 break;
1276 }
1277 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1278 if (ret < 0)
1279 break;
1280 mutex_unlock(&runtime->oss.params_lock);
1281 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1282 frames, in_kernel);
1283 mutex_lock(&runtime->oss.params_lock);
1284 if (ret == -EPIPE) {
1285 if (runtime->state == SNDRV_PCM_STATE_DRAINING) {
1286 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1287 if (ret < 0)
1288 break;
1289 }
1290 continue;
1291 }
1292 if (ret != -ESTRPIPE)
1293 break;
1294 }
1295 return ret;
1296}
1297
1298#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1299snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1300{
1301 struct snd_pcm_runtime *runtime = substream->runtime;
1302 int ret;
1303 while (1) {
1304 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1305 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1306#ifdef OSS_DEBUG
1307 pcm_dbg(substream->pcm,
1308 "pcm_oss: writev: recovering from %s\n",
1309 runtime->state == SNDRV_PCM_STATE_XRUN ?
1310 "XRUN" : "SUSPEND");
1311#endif
1312 ret = snd_pcm_oss_prepare(substream);
1313 if (ret < 0)
1314 break;
1315 }
1316 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1317 if (ret != -EPIPE && ret != -ESTRPIPE)
1318 break;
1319
1320 /* test, if we can't store new data, because the stream */
1321 /* has not been started */
1322 if (runtime->state == SNDRV_PCM_STATE_PREPARED)
1323 return -EAGAIN;
1324 }
1325 return ret;
1326}
1327
1328snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1329{
1330 struct snd_pcm_runtime *runtime = substream->runtime;
1331 int ret;
1332 while (1) {
1333 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1334 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1335#ifdef OSS_DEBUG
1336 pcm_dbg(substream->pcm,
1337 "pcm_oss: readv: recovering from %s\n",
1338 runtime->state == SNDRV_PCM_STATE_XRUN ?
1339 "XRUN" : "SUSPEND");
1340#endif
1341 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1342 if (ret < 0)
1343 break;
1344 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
1345 ret = snd_pcm_oss_prepare(substream);
1346 if (ret < 0)
1347 break;
1348 }
1349 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1350 if (ret != -EPIPE && ret != -ESTRPIPE)
1351 break;
1352 }
1353 return ret;
1354}
1355#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1356
1357static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1358{
1359 struct snd_pcm_runtime *runtime = substream->runtime;
1360 snd_pcm_sframes_t frames, frames1;
1361#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1362 if (runtime->oss.plugin_first) {
1363 struct snd_pcm_plugin_channel *channels;
1364 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1365 if (!in_kernel) {
1366 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1367 return -EFAULT;
1368 buf = runtime->oss.buffer;
1369 }
1370 frames = bytes / oss_frame_bytes;
1371 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1372 if (frames1 < 0)
1373 return frames1;
1374 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1375 if (frames1 <= 0)
1376 return frames1;
1377 bytes = frames1 * oss_frame_bytes;
1378 } else
1379#endif
1380 {
1381 frames = bytes_to_frames(runtime, bytes);
1382 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1383 if (frames1 <= 0)
1384 return frames1;
1385 bytes = frames_to_bytes(runtime, frames1);
1386 }
1387 return bytes;
1388}
1389
1390static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1391{
1392 size_t xfer = 0;
1393 ssize_t tmp = 0;
1394 struct snd_pcm_runtime *runtime = substream->runtime;
1395
1396 if (atomic_read(&substream->mmap_count))
1397 return -ENXIO;
1398
1399 atomic_inc(&runtime->oss.rw_ref);
1400 while (bytes > 0) {
1401 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1402 tmp = -ERESTARTSYS;
1403 break;
1404 }
1405 tmp = snd_pcm_oss_make_ready_locked(substream);
1406 if (tmp < 0)
1407 goto err;
1408 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1409 tmp = bytes;
1410 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1411 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1412 if (tmp > 0) {
1413 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1414 tmp = -EFAULT;
1415 goto err;
1416 }
1417 }
1418 runtime->oss.buffer_used += tmp;
1419 buf += tmp;
1420 bytes -= tmp;
1421 xfer += tmp;
1422 if (substream->oss.setup.partialfrag ||
1423 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1424 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1425 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1426 if (tmp <= 0)
1427 goto err;
1428 runtime->oss.bytes += tmp;
1429 runtime->oss.period_ptr += tmp;
1430 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1431 if (runtime->oss.period_ptr == 0 ||
1432 runtime->oss.period_ptr == runtime->oss.buffer_used)
1433 runtime->oss.buffer_used = 0;
1434 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1435 tmp = -EAGAIN;
1436 goto err;
1437 }
1438 }
1439 } else {
1440 tmp = snd_pcm_oss_write2(substream,
1441 (const char __force *)buf,
1442 runtime->oss.period_bytes, 0);
1443 if (tmp <= 0)
1444 goto err;
1445 runtime->oss.bytes += tmp;
1446 buf += tmp;
1447 bytes -= tmp;
1448 xfer += tmp;
1449 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1450 tmp != runtime->oss.period_bytes)
1451 tmp = -EAGAIN;
1452 }
1453 err:
1454 mutex_unlock(&runtime->oss.params_lock);
1455 if (tmp < 0)
1456 break;
1457 if (signal_pending(current)) {
1458 tmp = -ERESTARTSYS;
1459 break;
1460 }
1461 tmp = 0;
1462 }
1463 atomic_dec(&runtime->oss.rw_ref);
1464 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1465}
1466
1467static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1468{
1469 struct snd_pcm_runtime *runtime = substream->runtime;
1470 snd_pcm_sframes_t frames, frames1;
1471#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1472 char __user *final_dst = (char __force __user *)buf;
1473 if (runtime->oss.plugin_first) {
1474 struct snd_pcm_plugin_channel *channels;
1475 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1476 if (!in_kernel)
1477 buf = runtime->oss.buffer;
1478 frames = bytes / oss_frame_bytes;
1479 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1480 if (frames1 < 0)
1481 return frames1;
1482 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1483 if (frames1 <= 0)
1484 return frames1;
1485 bytes = frames1 * oss_frame_bytes;
1486 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1487 return -EFAULT;
1488 } else
1489#endif
1490 {
1491 frames = bytes_to_frames(runtime, bytes);
1492 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1493 if (frames1 <= 0)
1494 return frames1;
1495 bytes = frames_to_bytes(runtime, frames1);
1496 }
1497 return bytes;
1498}
1499
1500static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1501{
1502 size_t xfer = 0;
1503 ssize_t tmp = 0;
1504 struct snd_pcm_runtime *runtime = substream->runtime;
1505
1506 if (atomic_read(&substream->mmap_count))
1507 return -ENXIO;
1508
1509 atomic_inc(&runtime->oss.rw_ref);
1510 while (bytes > 0) {
1511 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1512 tmp = -ERESTARTSYS;
1513 break;
1514 }
1515 tmp = snd_pcm_oss_make_ready_locked(substream);
1516 if (tmp < 0)
1517 goto err;
1518 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1519 if (runtime->oss.buffer_used == 0) {
1520 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1521 if (tmp <= 0)
1522 goto err;
1523 runtime->oss.bytes += tmp;
1524 runtime->oss.period_ptr = tmp;
1525 runtime->oss.buffer_used = tmp;
1526 }
1527 tmp = bytes;
1528 if ((size_t) tmp > runtime->oss.buffer_used)
1529 tmp = runtime->oss.buffer_used;
1530 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1531 tmp = -EFAULT;
1532 goto err;
1533 }
1534 buf += tmp;
1535 bytes -= tmp;
1536 xfer += tmp;
1537 runtime->oss.buffer_used -= tmp;
1538 } else {
1539 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1540 runtime->oss.period_bytes, 0);
1541 if (tmp <= 0)
1542 goto err;
1543 runtime->oss.bytes += tmp;
1544 buf += tmp;
1545 bytes -= tmp;
1546 xfer += tmp;
1547 }
1548 err:
1549 mutex_unlock(&runtime->oss.params_lock);
1550 if (tmp < 0)
1551 break;
1552 if (signal_pending(current)) {
1553 tmp = -ERESTARTSYS;
1554 break;
1555 }
1556 tmp = 0;
1557 }
1558 atomic_dec(&runtime->oss.rw_ref);
1559 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1560}
1561
1562static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1563{
1564 struct snd_pcm_substream *substream;
1565 struct snd_pcm_runtime *runtime;
1566 int i;
1567
1568 for (i = 0; i < 2; i++) {
1569 substream = pcm_oss_file->streams[i];
1570 if (!substream)
1571 continue;
1572 runtime = substream->runtime;
1573 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1574 mutex_lock(&runtime->oss.params_lock);
1575 runtime->oss.prepare = 1;
1576 runtime->oss.buffer_used = 0;
1577 runtime->oss.prev_hw_ptr_period = 0;
1578 runtime->oss.period_ptr = 0;
1579 mutex_unlock(&runtime->oss.params_lock);
1580 }
1581 return 0;
1582}
1583
1584static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1585{
1586 struct snd_pcm_substream *substream;
1587 int err;
1588
1589 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1590 if (substream != NULL) {
1591 err = snd_pcm_oss_make_ready(substream);
1592 if (err < 0)
1593 return err;
1594 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1595 }
1596 /* note: all errors from the start action are ignored */
1597 /* OSS apps do not know, how to handle them */
1598 return 0;
1599}
1600
1601static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1602{
1603 struct snd_pcm_runtime *runtime;
1604 ssize_t result = 0;
1605 snd_pcm_state_t state;
1606 long res;
1607 wait_queue_entry_t wait;
1608
1609 runtime = substream->runtime;
1610 init_waitqueue_entry(&wait, current);
1611 add_wait_queue(&runtime->sleep, &wait);
1612#ifdef OSS_DEBUG
1613 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1614#endif
1615 while (1) {
1616 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1617 if (result > 0) {
1618 runtime->oss.buffer_used = 0;
1619 result = 0;
1620 break;
1621 }
1622 if (result != 0 && result != -EAGAIN)
1623 break;
1624 result = 0;
1625 set_current_state(TASK_INTERRUPTIBLE);
1626 scoped_guard(pcm_stream_lock_irq, substream)
1627 state = runtime->state;
1628 if (state != SNDRV_PCM_STATE_RUNNING) {
1629 set_current_state(TASK_RUNNING);
1630 break;
1631 }
1632 res = schedule_timeout(10 * HZ);
1633 if (signal_pending(current)) {
1634 result = -ERESTARTSYS;
1635 break;
1636 }
1637 if (res == 0) {
1638 pcm_err(substream->pcm,
1639 "OSS sync error - DMA timeout\n");
1640 result = -EIO;
1641 break;
1642 }
1643 }
1644 remove_wait_queue(&runtime->sleep, &wait);
1645 return result;
1646}
1647
1648static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1649{
1650 int err = 0;
1651 unsigned int saved_f_flags;
1652 struct snd_pcm_substream *substream;
1653 struct snd_pcm_runtime *runtime;
1654 snd_pcm_format_t format;
1655 unsigned long width;
1656 size_t size;
1657
1658 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1659 if (substream != NULL) {
1660 runtime = substream->runtime;
1661 if (atomic_read(&substream->mmap_count))
1662 goto __direct;
1663 atomic_inc(&runtime->oss.rw_ref);
1664 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1665 atomic_dec(&runtime->oss.rw_ref);
1666 return -ERESTARTSYS;
1667 }
1668 err = snd_pcm_oss_make_ready_locked(substream);
1669 if (err < 0)
1670 goto unlock;
1671 format = snd_pcm_oss_format_from(runtime->oss.format);
1672 width = snd_pcm_format_physical_width(format);
1673 if (runtime->oss.buffer_used > 0) {
1674#ifdef OSS_DEBUG
1675 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1676#endif
1677 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1678 snd_pcm_format_set_silence(format,
1679 runtime->oss.buffer + runtime->oss.buffer_used,
1680 size);
1681 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1682 if (err < 0)
1683 goto unlock;
1684 } else if (runtime->oss.period_ptr > 0) {
1685#ifdef OSS_DEBUG
1686 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1687#endif
1688 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1689 snd_pcm_format_set_silence(format,
1690 runtime->oss.buffer,
1691 size * 8 / width);
1692 err = snd_pcm_oss_sync1(substream, size);
1693 if (err < 0)
1694 goto unlock;
1695 }
1696 /*
1697 * The ALSA's period might be a bit large than OSS one.
1698 * Fill the remain portion of ALSA period with zeros.
1699 */
1700 size = runtime->control->appl_ptr % runtime->period_size;
1701 if (size > 0) {
1702 size = runtime->period_size - size;
1703 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1704 snd_pcm_lib_write(substream, NULL, size);
1705 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1706 snd_pcm_lib_writev(substream, NULL, size);
1707 }
1708unlock:
1709 mutex_unlock(&runtime->oss.params_lock);
1710 atomic_dec(&runtime->oss.rw_ref);
1711 if (err < 0)
1712 return err;
1713 /*
1714 * finish sync: drain the buffer
1715 */
1716 __direct:
1717 saved_f_flags = substream->f_flags;
1718 substream->f_flags &= ~O_NONBLOCK;
1719 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1720 substream->f_flags = saved_f_flags;
1721 if (err < 0)
1722 return err;
1723 mutex_lock(&runtime->oss.params_lock);
1724 runtime->oss.prepare = 1;
1725 mutex_unlock(&runtime->oss.params_lock);
1726 }
1727
1728 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1729 if (substream != NULL) {
1730 err = snd_pcm_oss_make_ready(substream);
1731 if (err < 0)
1732 return err;
1733 runtime = substream->runtime;
1734 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1735 if (err < 0)
1736 return err;
1737 mutex_lock(&runtime->oss.params_lock);
1738 runtime->oss.buffer_used = 0;
1739 runtime->oss.prepare = 1;
1740 mutex_unlock(&runtime->oss.params_lock);
1741 }
1742 return 0;
1743}
1744
1745static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1746{
1747 int idx;
1748
1749 for (idx = 1; idx >= 0; --idx) {
1750 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1751 struct snd_pcm_runtime *runtime;
1752 int err;
1753
1754 if (substream == NULL)
1755 continue;
1756 runtime = substream->runtime;
1757 if (rate < 1000)
1758 rate = 1000;
1759 else if (rate > 192000)
1760 rate = 192000;
1761 err = lock_params(runtime);
1762 if (err < 0)
1763 return err;
1764 if (runtime->oss.rate != rate) {
1765 runtime->oss.params = 1;
1766 runtime->oss.rate = rate;
1767 }
1768 unlock_params(runtime);
1769 }
1770 return snd_pcm_oss_get_rate(pcm_oss_file);
1771}
1772
1773static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1774{
1775 struct snd_pcm_substream *substream;
1776 int err;
1777
1778 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1779 if (err < 0)
1780 return err;
1781 return substream->runtime->oss.rate;
1782}
1783
1784static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1785{
1786 int idx;
1787 if (channels < 1)
1788 channels = 1;
1789 if (channels > 128)
1790 return -EINVAL;
1791 for (idx = 1; idx >= 0; --idx) {
1792 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1793 struct snd_pcm_runtime *runtime;
1794 int err;
1795
1796 if (substream == NULL)
1797 continue;
1798 runtime = substream->runtime;
1799 err = lock_params(runtime);
1800 if (err < 0)
1801 return err;
1802 if (runtime->oss.channels != channels) {
1803 runtime->oss.params = 1;
1804 runtime->oss.channels = channels;
1805 }
1806 unlock_params(runtime);
1807 }
1808 return snd_pcm_oss_get_channels(pcm_oss_file);
1809}
1810
1811static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1812{
1813 struct snd_pcm_substream *substream;
1814 int err;
1815
1816 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1817 if (err < 0)
1818 return err;
1819 return substream->runtime->oss.channels;
1820}
1821
1822static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1823{
1824 struct snd_pcm_substream *substream;
1825 int err;
1826
1827 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1828 if (err < 0)
1829 return err;
1830 return substream->runtime->oss.period_bytes;
1831}
1832
1833static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1834{
1835 struct snd_pcm_substream *substream;
1836 int err;
1837 int direct;
1838 struct snd_pcm_hw_params *params __free(kfree) = NULL;
1839 unsigned int formats = 0;
1840 const struct snd_mask *format_mask;
1841 int fmt;
1842
1843 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1844 if (err < 0)
1845 return err;
1846 if (atomic_read(&substream->mmap_count))
1847 direct = 1;
1848 else
1849 direct = substream->oss.setup.direct;
1850 if (!direct)
1851 return AFMT_MU_LAW | AFMT_U8 |
1852 AFMT_S16_LE | AFMT_S16_BE |
1853 AFMT_S8 | AFMT_U16_LE |
1854 AFMT_U16_BE |
1855 AFMT_S32_LE | AFMT_S32_BE |
1856 AFMT_S24_LE | AFMT_S24_BE |
1857 AFMT_S24_PACKED;
1858 params = kmalloc(sizeof(*params), GFP_KERNEL);
1859 if (!params)
1860 return -ENOMEM;
1861 _snd_pcm_hw_params_any(params);
1862 err = snd_pcm_hw_refine(substream, params);
1863 if (err < 0)
1864 return err;
1865 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1866 for (fmt = 0; fmt < 32; ++fmt) {
1867 if (snd_mask_test(format_mask, fmt)) {
1868 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1869 if (f >= 0)
1870 formats |= f;
1871 }
1872 }
1873
1874 return formats;
1875}
1876
1877static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1878{
1879 int formats, idx;
1880 int err;
1881
1882 if (format != AFMT_QUERY) {
1883 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1884 if (formats < 0)
1885 return formats;
1886 if (!(formats & format))
1887 format = AFMT_U8;
1888 for (idx = 1; idx >= 0; --idx) {
1889 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1890 struct snd_pcm_runtime *runtime;
1891 if (substream == NULL)
1892 continue;
1893 runtime = substream->runtime;
1894 err = lock_params(runtime);
1895 if (err < 0)
1896 return err;
1897 if (runtime->oss.format != format) {
1898 runtime->oss.params = 1;
1899 runtime->oss.format = format;
1900 }
1901 unlock_params(runtime);
1902 }
1903 }
1904 return snd_pcm_oss_get_format(pcm_oss_file);
1905}
1906
1907static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1908{
1909 struct snd_pcm_substream *substream;
1910 int err;
1911
1912 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1913 if (err < 0)
1914 return err;
1915 return substream->runtime->oss.format;
1916}
1917
1918static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1919{
1920 struct snd_pcm_runtime *runtime;
1921
1922 runtime = substream->runtime;
1923 if (subdivide == 0) {
1924 subdivide = runtime->oss.subdivision;
1925 if (subdivide == 0)
1926 subdivide = 1;
1927 return subdivide;
1928 }
1929 if (runtime->oss.subdivision || runtime->oss.fragshift)
1930 return -EINVAL;
1931 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1932 subdivide != 8 && subdivide != 16)
1933 return -EINVAL;
1934 runtime->oss.subdivision = subdivide;
1935 runtime->oss.params = 1;
1936 return subdivide;
1937}
1938
1939static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1940{
1941 int err = -EINVAL, idx;
1942
1943 for (idx = 1; idx >= 0; --idx) {
1944 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1945 struct snd_pcm_runtime *runtime;
1946
1947 if (substream == NULL)
1948 continue;
1949 runtime = substream->runtime;
1950 err = lock_params(runtime);
1951 if (err < 0)
1952 return err;
1953 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1954 unlock_params(runtime);
1955 if (err < 0)
1956 return err;
1957 }
1958 return err;
1959}
1960
1961static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1962{
1963 struct snd_pcm_runtime *runtime;
1964 int fragshift;
1965
1966 runtime = substream->runtime;
1967 if (runtime->oss.subdivision || runtime->oss.fragshift)
1968 return -EINVAL;
1969 fragshift = val & 0xffff;
1970 if (fragshift >= 25) /* should be large enough */
1971 return -EINVAL;
1972 runtime->oss.fragshift = fragshift;
1973 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1974 if (runtime->oss.fragshift < 4) /* < 16 */
1975 runtime->oss.fragshift = 4;
1976 if (runtime->oss.maxfrags < 2)
1977 runtime->oss.maxfrags = 2;
1978 runtime->oss.params = 1;
1979 return 0;
1980}
1981
1982static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1983{
1984 int err = -EINVAL, idx;
1985
1986 for (idx = 1; idx >= 0; --idx) {
1987 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1988 struct snd_pcm_runtime *runtime;
1989
1990 if (substream == NULL)
1991 continue;
1992 runtime = substream->runtime;
1993 err = lock_params(runtime);
1994 if (err < 0)
1995 return err;
1996 err = snd_pcm_oss_set_fragment1(substream, val);
1997 unlock_params(runtime);
1998 if (err < 0)
1999 return err;
2000 }
2001 return err;
2002}
2003
2004static int snd_pcm_oss_nonblock(struct file * file)
2005{
2006 spin_lock(&file->f_lock);
2007 file->f_flags |= O_NONBLOCK;
2008 spin_unlock(&file->f_lock);
2009 return 0;
2010}
2011
2012static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
2013{
2014
2015 if (substream == NULL) {
2016 res &= ~DSP_CAP_DUPLEX;
2017 return res;
2018 }
2019#ifdef DSP_CAP_MULTI
2020 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2021 if (substream->pstr->substream_count > 1)
2022 res |= DSP_CAP_MULTI;
2023#endif
2024 /* DSP_CAP_REALTIME is set all times: */
2025 /* all ALSA drivers can return actual pointer in ring buffer */
2026#if defined(DSP_CAP_REALTIME) && 0
2027 {
2028 struct snd_pcm_runtime *runtime = substream->runtime;
2029 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2030 res &= ~DSP_CAP_REALTIME;
2031 }
2032#endif
2033 return res;
2034}
2035
2036static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2037{
2038 int result, idx;
2039
2040 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2041 for (idx = 0; idx < 2; idx++) {
2042 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2043 result = snd_pcm_oss_get_caps1(substream, result);
2044 }
2045 result |= 0x0001; /* revision - same as SB AWE 64 */
2046 return result;
2047}
2048
2049static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2050 snd_pcm_uframes_t hw_ptr)
2051{
2052 struct snd_pcm_runtime *runtime = substream->runtime;
2053 snd_pcm_uframes_t appl_ptr;
2054 appl_ptr = hw_ptr + runtime->buffer_size;
2055 appl_ptr %= runtime->boundary;
2056 runtime->control->appl_ptr = appl_ptr;
2057}
2058
2059static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2060{
2061 struct snd_pcm_runtime *runtime;
2062 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2063 int err, cmd;
2064
2065#ifdef OSS_DEBUG
2066 pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
2067#endif
2068
2069 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2070 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2071
2072 if (psubstream) {
2073 err = snd_pcm_oss_make_ready(psubstream);
2074 if (err < 0)
2075 return err;
2076 }
2077 if (csubstream) {
2078 err = snd_pcm_oss_make_ready(csubstream);
2079 if (err < 0)
2080 return err;
2081 }
2082 if (psubstream) {
2083 runtime = psubstream->runtime;
2084 cmd = 0;
2085 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2086 return -ERESTARTSYS;
2087 if (trigger & PCM_ENABLE_OUTPUT) {
2088 if (runtime->oss.trigger)
2089 goto _skip1;
2090 if (atomic_read(&psubstream->mmap_count))
2091 snd_pcm_oss_simulate_fill(psubstream,
2092 get_hw_ptr_period(runtime));
2093 runtime->oss.trigger = 1;
2094 runtime->start_threshold = 1;
2095 cmd = SNDRV_PCM_IOCTL_START;
2096 } else {
2097 if (!runtime->oss.trigger)
2098 goto _skip1;
2099 runtime->oss.trigger = 0;
2100 runtime->start_threshold = runtime->boundary;
2101 cmd = SNDRV_PCM_IOCTL_DROP;
2102 runtime->oss.prepare = 1;
2103 }
2104 _skip1:
2105 mutex_unlock(&runtime->oss.params_lock);
2106 if (cmd) {
2107 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2108 if (err < 0)
2109 return err;
2110 }
2111 }
2112 if (csubstream) {
2113 runtime = csubstream->runtime;
2114 cmd = 0;
2115 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2116 return -ERESTARTSYS;
2117 if (trigger & PCM_ENABLE_INPUT) {
2118 if (runtime->oss.trigger)
2119 goto _skip2;
2120 runtime->oss.trigger = 1;
2121 runtime->start_threshold = 1;
2122 cmd = SNDRV_PCM_IOCTL_START;
2123 } else {
2124 if (!runtime->oss.trigger)
2125 goto _skip2;
2126 runtime->oss.trigger = 0;
2127 runtime->start_threshold = runtime->boundary;
2128 cmd = SNDRV_PCM_IOCTL_DROP;
2129 runtime->oss.prepare = 1;
2130 }
2131 _skip2:
2132 mutex_unlock(&runtime->oss.params_lock);
2133 if (cmd) {
2134 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2135 if (err < 0)
2136 return err;
2137 }
2138 }
2139 return 0;
2140}
2141
2142static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2143{
2144 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2145 int result = 0;
2146
2147 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2148 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2149 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2150 result |= PCM_ENABLE_OUTPUT;
2151 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2152 result |= PCM_ENABLE_INPUT;
2153 return result;
2154}
2155
2156static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2157{
2158 struct snd_pcm_substream *substream;
2159 struct snd_pcm_runtime *runtime;
2160 snd_pcm_sframes_t delay;
2161 int err;
2162
2163 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2164 if (substream == NULL)
2165 return -EINVAL;
2166 err = snd_pcm_oss_make_ready(substream);
2167 if (err < 0)
2168 return err;
2169 runtime = substream->runtime;
2170 if (runtime->oss.params || runtime->oss.prepare)
2171 return 0;
2172 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2173 if (err == -EPIPE)
2174 delay = 0; /* hack for broken OSS applications */
2175 else if (err < 0)
2176 return err;
2177 return snd_pcm_oss_bytes(substream, delay);
2178}
2179
2180static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2181{
2182 struct snd_pcm_substream *substream;
2183 struct snd_pcm_runtime *runtime;
2184 snd_pcm_sframes_t delay;
2185 int fixup;
2186 struct count_info info;
2187 int err;
2188
2189 if (_info == NULL)
2190 return -EFAULT;
2191 substream = pcm_oss_file->streams[stream];
2192 if (substream == NULL)
2193 return -EINVAL;
2194 err = snd_pcm_oss_make_ready(substream);
2195 if (err < 0)
2196 return err;
2197 runtime = substream->runtime;
2198 if (runtime->oss.params || runtime->oss.prepare) {
2199 memset(&info, 0, sizeof(info));
2200 if (copy_to_user(_info, &info, sizeof(info)))
2201 return -EFAULT;
2202 return 0;
2203 }
2204 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2205 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2206 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2207 err = 0;
2208 delay = 0;
2209 fixup = 0;
2210 } else {
2211 fixup = runtime->oss.buffer_used;
2212 }
2213 } else {
2214 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2215 fixup = -runtime->oss.buffer_used;
2216 }
2217 if (err < 0)
2218 return err;
2219 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2220 if (atomic_read(&substream->mmap_count)) {
2221 snd_pcm_sframes_t n;
2222 delay = get_hw_ptr_period(runtime);
2223 n = delay - runtime->oss.prev_hw_ptr_period;
2224 if (n < 0)
2225 n += runtime->boundary;
2226 info.blocks = n / runtime->period_size;
2227 runtime->oss.prev_hw_ptr_period = delay;
2228 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2229 snd_pcm_oss_simulate_fill(substream, delay);
2230 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2231 } else {
2232 delay = snd_pcm_oss_bytes(substream, delay);
2233 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2234 if (substream->oss.setup.buggyptr)
2235 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2236 else
2237 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2238 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2239 } else {
2240 delay += fixup;
2241 info.blocks = delay / runtime->oss.period_bytes;
2242 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2243 }
2244 }
2245 if (copy_to_user(_info, &info, sizeof(info)))
2246 return -EFAULT;
2247 return 0;
2248}
2249
2250static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2251{
2252 struct snd_pcm_substream *substream;
2253 struct snd_pcm_runtime *runtime;
2254 snd_pcm_sframes_t avail;
2255 int fixup;
2256 struct audio_buf_info info;
2257 int err;
2258
2259 if (_info == NULL)
2260 return -EFAULT;
2261 substream = pcm_oss_file->streams[stream];
2262 if (substream == NULL)
2263 return -EINVAL;
2264 runtime = substream->runtime;
2265
2266 if (runtime->oss.params) {
2267 err = snd_pcm_oss_change_params(substream, false);
2268 if (err < 0)
2269 return err;
2270 }
2271
2272 info.fragsize = runtime->oss.period_bytes;
2273 info.fragstotal = runtime->periods;
2274 if (runtime->oss.prepare) {
2275 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2276 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2277 info.fragments = runtime->oss.periods;
2278 } else {
2279 info.bytes = 0;
2280 info.fragments = 0;
2281 }
2282 } else {
2283 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2284 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2285 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2286 avail = runtime->buffer_size;
2287 err = 0;
2288 fixup = 0;
2289 } else {
2290 avail = runtime->buffer_size - avail;
2291 fixup = -runtime->oss.buffer_used;
2292 }
2293 } else {
2294 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2295 fixup = runtime->oss.buffer_used;
2296 }
2297 if (err < 0)
2298 return err;
2299 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2300 info.fragments = info.bytes / runtime->oss.period_bytes;
2301 }
2302
2303#ifdef OSS_DEBUG
2304 pcm_dbg(substream->pcm,
2305 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2306 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2307#endif
2308 if (copy_to_user(_info, &info, sizeof(info)))
2309 return -EFAULT;
2310 return 0;
2311}
2312
2313static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2314{
2315 // it won't be probably implemented
2316 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2317 return -EINVAL;
2318}
2319
2320static const char *strip_task_path(const char *path)
2321{
2322 const char *ptr, *ptrl = NULL;
2323 for (ptr = path; *ptr; ptr++) {
2324 if (*ptr == '/')
2325 ptrl = ptr + 1;
2326 }
2327 return ptrl;
2328}
2329
2330static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2331 const char *task_name,
2332 struct snd_pcm_oss_setup *rsetup)
2333{
2334 struct snd_pcm_oss_setup *setup;
2335
2336 guard(mutex)(&pcm->streams[stream].oss.setup_mutex);
2337 do {
2338 for (setup = pcm->streams[stream].oss.setup_list; setup;
2339 setup = setup->next) {
2340 if (!strcmp(setup->task_name, task_name))
2341 goto out;
2342 }
2343 } while ((task_name = strip_task_path(task_name)) != NULL);
2344 out:
2345 if (setup)
2346 *rsetup = *setup;
2347}
2348
2349static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2350{
2351 snd_pcm_oss_release_buffers(substream);
2352 substream->oss.oss = 0;
2353}
2354
2355static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2356 struct snd_pcm_oss_setup *setup,
2357 int minor)
2358{
2359 struct snd_pcm_runtime *runtime;
2360
2361 substream->oss.oss = 1;
2362 substream->oss.setup = *setup;
2363 if (setup->nonblock)
2364 substream->f_flags |= O_NONBLOCK;
2365 else if (setup->block)
2366 substream->f_flags &= ~O_NONBLOCK;
2367 runtime = substream->runtime;
2368 runtime->oss.params = 1;
2369 runtime->oss.trigger = 1;
2370 runtime->oss.rate = 8000;
2371 mutex_init(&runtime->oss.params_lock);
2372 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2373 case SNDRV_MINOR_OSS_PCM_8:
2374 runtime->oss.format = AFMT_U8;
2375 break;
2376 case SNDRV_MINOR_OSS_PCM_16:
2377 runtime->oss.format = AFMT_S16_LE;
2378 break;
2379 default:
2380 runtime->oss.format = AFMT_MU_LAW;
2381 }
2382 runtime->oss.channels = 1;
2383 runtime->oss.fragshift = 0;
2384 runtime->oss.maxfrags = 0;
2385 runtime->oss.subdivision = 0;
2386 substream->pcm_release = snd_pcm_oss_release_substream;
2387 atomic_set(&runtime->oss.rw_ref, 0);
2388}
2389
2390static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2391{
2392 int cidx;
2393 if (!pcm_oss_file)
2394 return 0;
2395 for (cidx = 0; cidx < 2; ++cidx) {
2396 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2397 if (substream)
2398 snd_pcm_release_substream(substream);
2399 }
2400 kfree(pcm_oss_file);
2401 return 0;
2402}
2403
2404static int snd_pcm_oss_open_file(struct file *file,
2405 struct snd_pcm *pcm,
2406 struct snd_pcm_oss_file **rpcm_oss_file,
2407 int minor,
2408 struct snd_pcm_oss_setup *setup)
2409{
2410 int idx, err;
2411 struct snd_pcm_oss_file *pcm_oss_file;
2412 struct snd_pcm_substream *substream;
2413 fmode_t f_mode = file->f_mode;
2414
2415 if (rpcm_oss_file)
2416 *rpcm_oss_file = NULL;
2417
2418 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2419 if (pcm_oss_file == NULL)
2420 return -ENOMEM;
2421
2422 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2423 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2424 f_mode = FMODE_WRITE;
2425
2426 file->f_flags &= ~O_APPEND;
2427 for (idx = 0; idx < 2; idx++) {
2428 if (setup[idx].disable)
2429 continue;
2430 if (! pcm->streams[idx].substream_count)
2431 continue; /* no matching substream */
2432 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2433 if (! (f_mode & FMODE_WRITE))
2434 continue;
2435 } else {
2436 if (! (f_mode & FMODE_READ))
2437 continue;
2438 }
2439 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2440 if (err < 0) {
2441 snd_pcm_oss_release_file(pcm_oss_file);
2442 return err;
2443 }
2444
2445 pcm_oss_file->streams[idx] = substream;
2446 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2447 }
2448
2449 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2450 snd_pcm_oss_release_file(pcm_oss_file);
2451 return -EINVAL;
2452 }
2453
2454 file->private_data = pcm_oss_file;
2455 if (rpcm_oss_file)
2456 *rpcm_oss_file = pcm_oss_file;
2457 return 0;
2458}
2459
2460
2461static int snd_task_name(struct task_struct *task, char *name, size_t size)
2462{
2463 unsigned int idx;
2464
2465 if (snd_BUG_ON(!task || !name || size < 2))
2466 return -EINVAL;
2467 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2468 name[idx] = task->comm[idx];
2469 name[idx] = '\0';
2470 return 0;
2471}
2472
2473static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2474{
2475 int err;
2476 char task_name[32];
2477 struct snd_pcm *pcm;
2478 struct snd_pcm_oss_file *pcm_oss_file;
2479 struct snd_pcm_oss_setup setup[2];
2480 int nonblock;
2481 wait_queue_entry_t wait;
2482
2483 err = nonseekable_open(inode, file);
2484 if (err < 0)
2485 return err;
2486
2487 pcm = snd_lookup_oss_minor_data(iminor(inode),
2488 SNDRV_OSS_DEVICE_TYPE_PCM);
2489 if (pcm == NULL) {
2490 err = -ENODEV;
2491 goto __error1;
2492 }
2493 err = snd_card_file_add(pcm->card, file);
2494 if (err < 0)
2495 goto __error1;
2496 if (!try_module_get(pcm->card->module)) {
2497 err = -EFAULT;
2498 goto __error2;
2499 }
2500 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2501 err = -EFAULT;
2502 goto __error;
2503 }
2504 memset(setup, 0, sizeof(setup));
2505 if (file->f_mode & FMODE_WRITE)
2506 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2507 task_name, &setup[0]);
2508 if (file->f_mode & FMODE_READ)
2509 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2510 task_name, &setup[1]);
2511
2512 nonblock = !!(file->f_flags & O_NONBLOCK);
2513 if (!nonblock)
2514 nonblock = nonblock_open;
2515
2516 init_waitqueue_entry(&wait, current);
2517 add_wait_queue(&pcm->open_wait, &wait);
2518 mutex_lock(&pcm->open_mutex);
2519 while (1) {
2520 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2521 iminor(inode), setup);
2522 if (err >= 0)
2523 break;
2524 if (err == -EAGAIN) {
2525 if (nonblock) {
2526 err = -EBUSY;
2527 break;
2528 }
2529 } else
2530 break;
2531 set_current_state(TASK_INTERRUPTIBLE);
2532 mutex_unlock(&pcm->open_mutex);
2533 schedule();
2534 mutex_lock(&pcm->open_mutex);
2535 if (pcm->card->shutdown) {
2536 err = -ENODEV;
2537 break;
2538 }
2539 if (signal_pending(current)) {
2540 err = -ERESTARTSYS;
2541 break;
2542 }
2543 }
2544 remove_wait_queue(&pcm->open_wait, &wait);
2545 mutex_unlock(&pcm->open_mutex);
2546 if (err < 0)
2547 goto __error;
2548 snd_card_unref(pcm->card);
2549 return err;
2550
2551 __error:
2552 module_put(pcm->card->module);
2553 __error2:
2554 snd_card_file_remove(pcm->card, file);
2555 __error1:
2556 if (pcm)
2557 snd_card_unref(pcm->card);
2558 return err;
2559}
2560
2561static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2562{
2563 struct snd_pcm *pcm;
2564 struct snd_pcm_substream *substream;
2565 struct snd_pcm_oss_file *pcm_oss_file;
2566
2567 pcm_oss_file = file->private_data;
2568 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2569 if (substream == NULL)
2570 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2571 if (snd_BUG_ON(!substream))
2572 return -ENXIO;
2573 pcm = substream->pcm;
2574 if (!pcm->card->shutdown)
2575 snd_pcm_oss_sync(pcm_oss_file);
2576 mutex_lock(&pcm->open_mutex);
2577 snd_pcm_oss_release_file(pcm_oss_file);
2578 mutex_unlock(&pcm->open_mutex);
2579 wake_up(&pcm->open_wait);
2580 module_put(pcm->card->module);
2581 snd_card_file_remove(pcm->card, file);
2582 return 0;
2583}
2584
2585static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2586{
2587 struct snd_pcm_oss_file *pcm_oss_file;
2588 int __user *p = (int __user *)arg;
2589 int res;
2590
2591 pcm_oss_file = file->private_data;
2592 if (cmd == OSS_GETVERSION)
2593 return put_user(SNDRV_OSS_VERSION, p);
2594 if (cmd == OSS_ALSAEMULVER)
2595 return put_user(1, p);
2596#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2597 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2598 struct snd_pcm_substream *substream;
2599 int idx;
2600 for (idx = 0; idx < 2; ++idx) {
2601 substream = pcm_oss_file->streams[idx];
2602 if (substream != NULL)
2603 break;
2604 }
2605 if (snd_BUG_ON(idx >= 2))
2606 return -ENXIO;
2607 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2608 }
2609#endif
2610 if (((cmd >> 8) & 0xff) != 'P')
2611 return -EINVAL;
2612#ifdef OSS_DEBUG
2613 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2614#endif
2615 switch (cmd) {
2616 case SNDCTL_DSP_RESET:
2617 return snd_pcm_oss_reset(pcm_oss_file);
2618 case SNDCTL_DSP_SYNC:
2619 return snd_pcm_oss_sync(pcm_oss_file);
2620 case SNDCTL_DSP_SPEED:
2621 if (get_user(res, p))
2622 return -EFAULT;
2623 res = snd_pcm_oss_set_rate(pcm_oss_file, res);
2624 if (res < 0)
2625 return res;
2626 return put_user(res, p);
2627 case SOUND_PCM_READ_RATE:
2628 res = snd_pcm_oss_get_rate(pcm_oss_file);
2629 if (res < 0)
2630 return res;
2631 return put_user(res, p);
2632 case SNDCTL_DSP_STEREO:
2633 if (get_user(res, p))
2634 return -EFAULT;
2635 res = res > 0 ? 2 : 1;
2636 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2637 if (res < 0)
2638 return res;
2639 return put_user(--res, p);
2640 case SNDCTL_DSP_GETBLKSIZE:
2641 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2642 if (res < 0)
2643 return res;
2644 return put_user(res, p);
2645 case SNDCTL_DSP_SETFMT:
2646 if (get_user(res, p))
2647 return -EFAULT;
2648 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2649 if (res < 0)
2650 return res;
2651 return put_user(res, p);
2652 case SOUND_PCM_READ_BITS:
2653 res = snd_pcm_oss_get_format(pcm_oss_file);
2654 if (res < 0)
2655 return res;
2656 return put_user(res, p);
2657 case SNDCTL_DSP_CHANNELS:
2658 if (get_user(res, p))
2659 return -EFAULT;
2660 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2661 if (res < 0)
2662 return res;
2663 return put_user(res, p);
2664 case SOUND_PCM_READ_CHANNELS:
2665 res = snd_pcm_oss_get_channels(pcm_oss_file);
2666 if (res < 0)
2667 return res;
2668 return put_user(res, p);
2669 case SOUND_PCM_WRITE_FILTER:
2670 case SOUND_PCM_READ_FILTER:
2671 return -EIO;
2672 case SNDCTL_DSP_POST:
2673 return snd_pcm_oss_post(pcm_oss_file);
2674 case SNDCTL_DSP_SUBDIVIDE:
2675 if (get_user(res, p))
2676 return -EFAULT;
2677 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2678 if (res < 0)
2679 return res;
2680 return put_user(res, p);
2681 case SNDCTL_DSP_SETFRAGMENT:
2682 if (get_user(res, p))
2683 return -EFAULT;
2684 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2685 case SNDCTL_DSP_GETFMTS:
2686 res = snd_pcm_oss_get_formats(pcm_oss_file);
2687 if (res < 0)
2688 return res;
2689 return put_user(res, p);
2690 case SNDCTL_DSP_GETOSPACE:
2691 case SNDCTL_DSP_GETISPACE:
2692 return snd_pcm_oss_get_space(pcm_oss_file,
2693 cmd == SNDCTL_DSP_GETISPACE ?
2694 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2695 (struct audio_buf_info __user *) arg);
2696 case SNDCTL_DSP_NONBLOCK:
2697 return snd_pcm_oss_nonblock(file);
2698 case SNDCTL_DSP_GETCAPS:
2699 res = snd_pcm_oss_get_caps(pcm_oss_file);
2700 if (res < 0)
2701 return res;
2702 return put_user(res, p);
2703 case SNDCTL_DSP_GETTRIGGER:
2704 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2705 if (res < 0)
2706 return res;
2707 return put_user(res, p);
2708 case SNDCTL_DSP_SETTRIGGER:
2709 if (get_user(res, p))
2710 return -EFAULT;
2711 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2712 case SNDCTL_DSP_GETIPTR:
2713 case SNDCTL_DSP_GETOPTR:
2714 return snd_pcm_oss_get_ptr(pcm_oss_file,
2715 cmd == SNDCTL_DSP_GETIPTR ?
2716 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2717 (struct count_info __user *) arg);
2718 case SNDCTL_DSP_MAPINBUF:
2719 case SNDCTL_DSP_MAPOUTBUF:
2720 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2721 cmd == SNDCTL_DSP_MAPINBUF ?
2722 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2723 (struct buffmem_desc __user *) arg);
2724 case SNDCTL_DSP_SETSYNCRO:
2725 /* stop DMA now.. */
2726 return 0;
2727 case SNDCTL_DSP_SETDUPLEX:
2728 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2729 return 0;
2730 return -EIO;
2731 case SNDCTL_DSP_GETODELAY:
2732 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2733 if (res < 0) {
2734 /* it's for sure, some broken apps don't check for error codes */
2735 put_user(0, p);
2736 return res;
2737 }
2738 return put_user(res, p);
2739 case SNDCTL_DSP_PROFILE:
2740 return 0; /* silently ignore */
2741 default:
2742 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2743 }
2744 return -EINVAL;
2745}
2746
2747#ifdef CONFIG_COMPAT
2748/* all compatible */
2749static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2750 unsigned long arg)
2751{
2752 /*
2753 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2754 * which are not implemented for the native case either
2755 */
2756 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2757}
2758#else
2759#define snd_pcm_oss_ioctl_compat NULL
2760#endif
2761
2762static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2763{
2764 struct snd_pcm_oss_file *pcm_oss_file;
2765 struct snd_pcm_substream *substream;
2766
2767 pcm_oss_file = file->private_data;
2768 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2769 if (substream == NULL)
2770 return -ENXIO;
2771 substream->f_flags = file->f_flags & O_NONBLOCK;
2772#ifndef OSS_DEBUG
2773 return snd_pcm_oss_read1(substream, buf, count);
2774#else
2775 {
2776 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2777 pcm_dbg(substream->pcm,
2778 "pcm_oss: read %li bytes (returned %li bytes)\n",
2779 (long)count, (long)res);
2780 return res;
2781 }
2782#endif
2783}
2784
2785static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2786{
2787 struct snd_pcm_oss_file *pcm_oss_file;
2788 struct snd_pcm_substream *substream;
2789 long result;
2790
2791 pcm_oss_file = file->private_data;
2792 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2793 if (substream == NULL)
2794 return -ENXIO;
2795 substream->f_flags = file->f_flags & O_NONBLOCK;
2796 result = snd_pcm_oss_write1(substream, buf, count);
2797#ifdef OSS_DEBUG
2798 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2799 (long)count, (long)result);
2800#endif
2801 return result;
2802}
2803
2804static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2805{
2806 struct snd_pcm_runtime *runtime = substream->runtime;
2807 if (atomic_read(&substream->mmap_count))
2808 return runtime->oss.prev_hw_ptr_period !=
2809 get_hw_ptr_period(runtime);
2810 else
2811 return snd_pcm_playback_avail(runtime) >=
2812 runtime->oss.period_frames;
2813}
2814
2815static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2816{
2817 struct snd_pcm_runtime *runtime = substream->runtime;
2818 if (atomic_read(&substream->mmap_count))
2819 return runtime->oss.prev_hw_ptr_period !=
2820 get_hw_ptr_period(runtime);
2821 else
2822 return snd_pcm_capture_avail(runtime) >=
2823 runtime->oss.period_frames;
2824}
2825
2826static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2827{
2828 struct snd_pcm_oss_file *pcm_oss_file;
2829 __poll_t mask;
2830 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2831
2832 pcm_oss_file = file->private_data;
2833
2834 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2835 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2836
2837 mask = 0;
2838 if (psubstream != NULL) {
2839 struct snd_pcm_runtime *runtime = psubstream->runtime;
2840 poll_wait(file, &runtime->sleep, wait);
2841 scoped_guard(pcm_stream_lock_irq, psubstream) {
2842 if (runtime->state != SNDRV_PCM_STATE_DRAINING &&
2843 (runtime->state != SNDRV_PCM_STATE_RUNNING ||
2844 snd_pcm_oss_playback_ready(psubstream)))
2845 mask |= EPOLLOUT | EPOLLWRNORM;
2846 }
2847 }
2848 if (csubstream != NULL) {
2849 struct snd_pcm_runtime *runtime = csubstream->runtime;
2850 snd_pcm_state_t ostate;
2851 poll_wait(file, &runtime->sleep, wait);
2852 scoped_guard(pcm_stream_lock_irq, csubstream) {
2853 ostate = runtime->state;
2854 if (ostate != SNDRV_PCM_STATE_RUNNING ||
2855 snd_pcm_oss_capture_ready(csubstream))
2856 mask |= EPOLLIN | EPOLLRDNORM;
2857 }
2858 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2859 struct snd_pcm_oss_file ofile;
2860 memset(&ofile, 0, sizeof(ofile));
2861 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2862 runtime->oss.trigger = 0;
2863 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2864 }
2865 }
2866
2867 return mask;
2868}
2869
2870static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2871{
2872 struct snd_pcm_oss_file *pcm_oss_file;
2873 struct snd_pcm_substream *substream = NULL;
2874 struct snd_pcm_runtime *runtime;
2875 int err;
2876
2877#ifdef OSS_DEBUG
2878 pr_debug("pcm_oss: mmap begin\n");
2879#endif
2880 pcm_oss_file = file->private_data;
2881 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2882 case VM_READ | VM_WRITE:
2883 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2884 if (substream)
2885 break;
2886 fallthrough;
2887 case VM_READ:
2888 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2889 break;
2890 case VM_WRITE:
2891 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2892 break;
2893 default:
2894 return -EINVAL;
2895 }
2896 /* set VM_READ access as well to fix memset() routines that do
2897 reads before writes (to improve performance) */
2898 vm_flags_set(area, VM_READ);
2899 if (substream == NULL)
2900 return -ENXIO;
2901 runtime = substream->runtime;
2902 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2903 return -EIO;
2904 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2905 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2906 else
2907 return -EIO;
2908
2909 if (runtime->oss.params) {
2910 /* use mutex_trylock() for params_lock for avoiding a deadlock
2911 * between mmap_lock and params_lock taken by
2912 * copy_from/to_user() in snd_pcm_oss_write/read()
2913 */
2914 err = snd_pcm_oss_change_params(substream, true);
2915 if (err < 0)
2916 return err;
2917 }
2918#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2919 if (runtime->oss.plugin_first != NULL)
2920 return -EIO;
2921#endif
2922
2923 if (area->vm_pgoff != 0)
2924 return -EINVAL;
2925
2926 err = snd_pcm_mmap_data(substream, file, area);
2927 if (err < 0)
2928 return err;
2929 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2930 runtime->silence_threshold = 0;
2931 runtime->silence_size = 0;
2932#ifdef OSS_DEBUG
2933 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2934 runtime->oss.mmap_bytes);
2935#endif
2936 /* In mmap mode we never stop */
2937 runtime->stop_threshold = runtime->boundary;
2938
2939 return 0;
2940}
2941
2942#ifdef CONFIG_SND_VERBOSE_PROCFS
2943/*
2944 * /proc interface
2945 */
2946
2947static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2948 struct snd_info_buffer *buffer)
2949{
2950 struct snd_pcm_str *pstr = entry->private_data;
2951 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2952 guard(mutex)(&pstr->oss.setup_mutex);
2953 while (setup) {
2954 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2955 setup->task_name,
2956 setup->periods,
2957 setup->period_size,
2958 setup->disable ? " disable" : "",
2959 setup->direct ? " direct" : "",
2960 setup->block ? " block" : "",
2961 setup->nonblock ? " non-block" : "",
2962 setup->partialfrag ? " partial-frag" : "",
2963 setup->nosilence ? " no-silence" : "");
2964 setup = setup->next;
2965 }
2966}
2967
2968static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2969{
2970 struct snd_pcm_oss_setup *setup, *setupn;
2971
2972 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2973 setup; setup = setupn) {
2974 setupn = setup->next;
2975 kfree(setup->task_name);
2976 kfree(setup);
2977 }
2978 pstr->oss.setup_list = NULL;
2979}
2980
2981static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2982 struct snd_info_buffer *buffer)
2983{
2984 struct snd_pcm_str *pstr = entry->private_data;
2985 char line[128], str[32], task_name[32];
2986 const char *ptr;
2987 int idx1;
2988 struct snd_pcm_oss_setup *setup, *setup1, template;
2989
2990 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2991 guard(mutex)(&pstr->oss.setup_mutex);
2992 memset(&template, 0, sizeof(template));
2993 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2994 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2995 snd_pcm_oss_proc_free_setup_list(pstr);
2996 continue;
2997 }
2998 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2999 if (!strcmp(setup->task_name, task_name)) {
3000 template = *setup;
3001 break;
3002 }
3003 }
3004 ptr = snd_info_get_str(str, ptr, sizeof(str));
3005 template.periods = simple_strtoul(str, NULL, 10);
3006 ptr = snd_info_get_str(str, ptr, sizeof(str));
3007 template.period_size = simple_strtoul(str, NULL, 10);
3008 for (idx1 = 31; idx1 >= 0; idx1--)
3009 if (template.period_size & (1 << idx1))
3010 break;
3011 for (idx1--; idx1 >= 0; idx1--)
3012 template.period_size &= ~(1 << idx1);
3013 do {
3014 ptr = snd_info_get_str(str, ptr, sizeof(str));
3015 if (!strcmp(str, "disable")) {
3016 template.disable = 1;
3017 } else if (!strcmp(str, "direct")) {
3018 template.direct = 1;
3019 } else if (!strcmp(str, "block")) {
3020 template.block = 1;
3021 } else if (!strcmp(str, "non-block")) {
3022 template.nonblock = 1;
3023 } else if (!strcmp(str, "partial-frag")) {
3024 template.partialfrag = 1;
3025 } else if (!strcmp(str, "no-silence")) {
3026 template.nosilence = 1;
3027 } else if (!strcmp(str, "buggy-ptr")) {
3028 template.buggyptr = 1;
3029 }
3030 } while (*str);
3031 if (setup == NULL) {
3032 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3033 if (! setup) {
3034 buffer->error = -ENOMEM;
3035 return;
3036 }
3037 if (pstr->oss.setup_list == NULL)
3038 pstr->oss.setup_list = setup;
3039 else {
3040 for (setup1 = pstr->oss.setup_list;
3041 setup1->next; setup1 = setup1->next);
3042 setup1->next = setup;
3043 }
3044 template.task_name = kstrdup(task_name, GFP_KERNEL);
3045 if (! template.task_name) {
3046 kfree(setup);
3047 buffer->error = -ENOMEM;
3048 return;
3049 }
3050 }
3051 *setup = template;
3052 }
3053}
3054
3055static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3056{
3057 int stream;
3058 for (stream = 0; stream < 2; ++stream) {
3059 struct snd_info_entry *entry;
3060 struct snd_pcm_str *pstr = &pcm->streams[stream];
3061 if (pstr->substream_count == 0)
3062 continue;
3063 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root);
3064 if (entry) {
3065 entry->content = SNDRV_INFO_CONTENT_TEXT;
3066 entry->mode = S_IFREG | 0644;
3067 entry->c.text.read = snd_pcm_oss_proc_read;
3068 entry->c.text.write = snd_pcm_oss_proc_write;
3069 entry->private_data = pstr;
3070 if (snd_info_register(entry) < 0) {
3071 snd_info_free_entry(entry);
3072 entry = NULL;
3073 }
3074 }
3075 pstr->oss.proc_entry = entry;
3076 }
3077}
3078
3079static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3080{
3081 int stream;
3082 for (stream = 0; stream < 2; ++stream) {
3083 struct snd_pcm_str *pstr = &pcm->streams[stream];
3084 snd_info_free_entry(pstr->oss.proc_entry);
3085 pstr->oss.proc_entry = NULL;
3086 snd_pcm_oss_proc_free_setup_list(pstr);
3087 }
3088}
3089#else /* !CONFIG_SND_VERBOSE_PROCFS */
3090static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3091{
3092}
3093static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3094{
3095}
3096#endif /* CONFIG_SND_VERBOSE_PROCFS */
3097
3098/*
3099 * ENTRY functions
3100 */
3101
3102static const struct file_operations snd_pcm_oss_f_reg =
3103{
3104 .owner = THIS_MODULE,
3105 .read = snd_pcm_oss_read,
3106 .write = snd_pcm_oss_write,
3107 .open = snd_pcm_oss_open,
3108 .release = snd_pcm_oss_release,
3109 .poll = snd_pcm_oss_poll,
3110 .unlocked_ioctl = snd_pcm_oss_ioctl,
3111 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3112 .mmap = snd_pcm_oss_mmap,
3113};
3114
3115static void register_oss_dsp(struct snd_pcm *pcm, int index)
3116{
3117 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3118 pcm->card, index, &snd_pcm_oss_f_reg,
3119 pcm) < 0) {
3120 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3121 pcm->card->number, pcm->device);
3122 }
3123}
3124
3125static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3126{
3127 pcm->oss.reg = 0;
3128 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3129 char name[128];
3130 int duplex;
3131 register_oss_dsp(pcm, 0);
3132 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3133 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3134 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3135 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3136#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3137 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3138 pcm->card->number,
3139 name);
3140#endif
3141 pcm->oss.reg++;
3142 pcm->oss.reg_mask |= 1;
3143 }
3144 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3145 register_oss_dsp(pcm, 1);
3146 pcm->oss.reg++;
3147 pcm->oss.reg_mask |= 2;
3148 }
3149
3150 if (pcm->oss.reg)
3151 snd_pcm_oss_proc_init(pcm);
3152
3153 return 0;
3154}
3155
3156static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3157{
3158 if (pcm->oss.reg) {
3159 if (pcm->oss.reg_mask & 1) {
3160 pcm->oss.reg_mask &= ~1;
3161 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3162 pcm->card, 0);
3163 }
3164 if (pcm->oss.reg_mask & 2) {
3165 pcm->oss.reg_mask &= ~2;
3166 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3167 pcm->card, 1);
3168 }
3169 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3170#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3171 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3172#endif
3173 }
3174 pcm->oss.reg = 0;
3175 }
3176 return 0;
3177}
3178
3179static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3180{
3181 snd_pcm_oss_disconnect_minor(pcm);
3182 snd_pcm_oss_proc_done(pcm);
3183 return 0;
3184}
3185
3186static struct snd_pcm_notify snd_pcm_oss_notify =
3187{
3188 .n_register = snd_pcm_oss_register_minor,
3189 .n_disconnect = snd_pcm_oss_disconnect_minor,
3190 .n_unregister = snd_pcm_oss_unregister_minor,
3191};
3192
3193static int __init alsa_pcm_oss_init(void)
3194{
3195 int i;
3196 int err;
3197
3198 /* check device map table */
3199 for (i = 0; i < SNDRV_CARDS; i++) {
3200 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3201 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3202 i, dsp_map[i]);
3203 dsp_map[i] = 0;
3204 }
3205 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3206 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3207 i, adsp_map[i]);
3208 adsp_map[i] = 1;
3209 }
3210 }
3211 err = snd_pcm_notify(&snd_pcm_oss_notify, 0);
3212 if (err < 0)
3213 return err;
3214 return 0;
3215}
3216
3217static void __exit alsa_pcm_oss_exit(void)
3218{
3219 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3220}
3221
3222module_init(alsa_pcm_oss_init)
3223module_exit(alsa_pcm_oss_exit)