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Merge tag 'soc-ep93xx-dt-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[linux-2.6-block.git] / sound / core / oss / pcm_oss.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * Digital Audio (PCM) abstract layer / OSS compatible
c1017a4c 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 5 */
6
7#if 0
8#define PLUGIN_DEBUG
9#endif
10#if 0
11#define OSS_DEBUG
12#endif
13
1da177e4 14#include <linux/init.h>
1da177e4 15#include <linux/slab.h>
174cd4b1 16#include <linux/sched/signal.h>
1da177e4
LT		 17#include <linux/time.h>
18#include <linux/vmalloc.h>
65a77217 19#include <linux/module.h>
3f7440a6 20#include <linux/math64.h>
543537bd 21#include <linux/string.h>
83266b6b 22#include <linux/compat.h>
1da177e4
LT		 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>
fea952e5 31#include <sound/mixer_oss.h>
1da177e4
LT		 32
33#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
34
6581f4e7 35static int dsp_map[SNDRV_CARDS];
1da177e4 36static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
a67ff6a5 37static bool nonblock_open = 1;
1da177e4 38
c1017a4c 39MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
1da177e4
LT		 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
6ac77bc1
TI		 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);
1da177e4 54
e88e8ae6
TI		 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 */
9d2479c9 150static int
e88e8ae6
TI		 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);
7a0a8716 174 if (changed > 0) {
e88e8ae6
TI		 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;
7a0a8716 221 if (changed > 0) {
e88e8ae6
TI		 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;
7a0a8716 282 if (changed > 0) {
e88e8ae6
TI		 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{
a55bc334 380 struct snd_pcm_hw_params *save __free(kfree) = NULL;
e88e8ae6
TI		 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) {
a55bc334 407 struct snd_pcm_hw_params *params1 __free(kfree) = NULL;
e88e8ae6
TI		 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);
a55bc334 413 if (params1 == NULL)
e88e8ae6 414 return -ENOMEM;
e88e8ae6
TI		 415 *params1 = *save;
416 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
a55bc334 417 if (max < 0)
e88e8ae6 418 goto _end;
e88e8ae6
TI		 419 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
420 *params = *params1;
421 last = 1;
422 }
e88e8ae6
TI		 423 } else {
424 *params = *save;
425 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
a55bc334 426 if (max < 0)
7eaa943c 427 return max;
e88e8ae6
TI		 428 last = 1;
429 }
430 _end:
e88e8ae6
TI		 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);
e88e8ae6
TI		 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;
7a0a8716 479 if (changed > 0) {
e88e8ae6
TI		 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));
7a0a8716 519 if (changed > 0) {
e88e8ae6
TI		 520 params->cmask |= 1 << var;
521 params->rmask |= 1 << var;
522 }
523 return changed;
524}
525
526/*
527 * plugin
528 */
529
21a3479a 530#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 531static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 532{
6ac77bc1
TI		 533 struct snd_pcm_runtime *runtime = substream->runtime;
534 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 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
6ac77bc1 546static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 547{
6ac77bc1 548 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 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
6ac77bc1 561int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 562{
6ac77bc1 563 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 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}
21a3479a 575#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 576
6ac77bc1 577static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 578{
6ac77bc1 579 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 580 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 581 long bytes = frames_to_bytes(runtime, frames);
1da177e4 582 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 583 return bytes;
cdc5c53f
TI		 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;
3f7440a6 589 return div_u64(bsize, buffer_size);
cdc5c53f
TI		 590 }
591#endif
1da177e4
LT		 592}
593
6ac77bc1 594static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 595{
6ac77bc1 596 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 597 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 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
f240406b
JK		 603static inline
604snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
605{
e7636925 606 return runtime->hw_ptr_interrupt;
f240406b
JK		 607}
608
24038a25
TI		 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
fea952e5 625static snd_pcm_format_t snd_pcm_oss_format_from(int format)
1da177e4
LT		 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;
24038a25
TI		 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;
1da177e4
LT		 645 default: return SNDRV_PCM_FORMAT_U8;
646 }
647}
648
fea952e5 649static int snd_pcm_oss_format_to(snd_pcm_format_t format)
1da177e4
LT		 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;
24038a25
TI		 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;
1da177e4
LT		 669 default: return -EINVAL;
670 }
671}
672
6ac77bc1
TI		 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)
1da177e4 676{
9d2479c9
TI		 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;
6ac77bc1 681 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 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
9d2479c9
TI		 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;
1da177e4 692 oss_buffer_size = snd_pcm_plug_client_size(substream,
9d2479c9
TI		 693 oss_buffer_size * oss_frame_size);
694 if (oss_buffer_size <= 0)
11cb881b 695 return -EINVAL;
f6dbe1be 696 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
9c323fcb 697 if (atomic_read(&substream->mmap_count)) {
1da177e4
LT		 698 if (oss_buffer_size > runtime->oss.mmap_bytes)
699 oss_buffer_size = runtime->oss.mmap_bytes;
700 }
701
060d77b9
TI		 702 if (substream->oss.setup.period_size > 16)
703 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 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));
9d2479c9 731 if (min_period_size > 0) {
11cb881b
TI		 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 }
1da177e4
LT		 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));
9d2479c9 740 if (max_period_size > 0) {
11cb881b
TI		 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 }
1da177e4
LT		 746
747 oss_periods = oss_buffer_size / oss_period_size;
748
060d77b9
TI		 749 if (substream->oss.setup.periods > 1)
750 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 751
752 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
9d2479c9 753 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
1da177e4
LT		 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
7eaa943c
TI		 767 if (oss_period_size < 16)
768 return -EINVAL;
efb6402c
TI		 769
770 /* don't allocate too large period; 1MB period must be enough */
771 if (oss_period_size > 1024 * 1024)
772 return -ENOMEM;
773
1da177e4
LT		 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
6ac77bc1
TI		 780static int choose_rate(struct snd_pcm_substream *substream,
781 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 782{
b55f9fdc 783 const struct snd_interval *it;
a55bc334 784 struct snd_pcm_hw_params *save __free(kfree) = NULL;
1da177e4
LT		 785 unsigned int rate, prev;
786
787 save = kmalloc(sizeof(*save), GFP_KERNEL);
788 if (save == NULL)
789 return -ENOMEM;
790 *save = *params;
b55f9fdc 791 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 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);
a55bc334 803 if (ret == (int)rate)
1da177e4 804 return rate;
1da177e4
LT		 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 */
1da177e4
LT		 814 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
815}
816
f6d297df
TI		 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
8a580a26
TI		 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
02a5d692
TI		 845/* call with params_lock held */
846static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
1da177e4 847{
6ac77bc1
TI		 848 struct snd_pcm_runtime *runtime = substream->runtime;
849 struct snd_pcm_hw_params *params, *sparams;
850 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 851 ssize_t oss_buffer_size, oss_period_size;
852 size_t oss_frame_size;
853 int err;
854 int direct;
fea952e5
CL		 855 snd_pcm_format_t format, sformat;
856 int n;
e76bf3c4 857 const struct snd_mask *sformat_mask;
6ac77bc1 858 struct snd_mask mask;
1da177e4 859
02a5d692
TI		 860 if (!runtime->oss.params)
861 return 0;
46325371 862 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
1da177e4
LT		 863 params = kmalloc(sizeof(*params), GFP_KERNEL);
864 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
865 if (!sw_params || !params || !sparams) {
1da177e4
LT		 866 err = -ENOMEM;
867 goto failure;
868 }
869
9c323fcb 870 if (atomic_read(&substream->mmap_count))
1da177e4 871 direct = 1;
060d77b9
TI		 872 else
873 direct = substream->oss.setup.direct;
1da177e4
LT		 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);
9c323fcb 879 if (atomic_read(&substream->mmap_count))
fea952e5 880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 881 else {
fea952e5 882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 883 if (!direct)
fea952e5 884 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
1da177e4
LT		 885 }
886 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
887 if (err < 0) {
61efcee8 888 pcm_dbg(substream->pcm, "No usable accesses\n");
1da177e4
LT		 889 err = -EINVAL;
890 goto failure;
891 }
6665bb30
TI		 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;
1da177e4
LT		 901
902 format = snd_pcm_oss_format_from(runtime->oss.format);
903
e76bf3c4 904 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 905 if (direct)
906 sformat = format;
907 else
e76bf3c4 908 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
1da177e4 909
fea952e5 910 if ((__force int)sformat < 0 ||
ba71d227
TI		 911 !snd_mask_test_format(sformat_mask, sformat)) {
912 pcm_for_each_format(sformat) {
913 if (snd_mask_test_format(sformat_mask, sformat) &&
1da177e4 914 snd_pcm_oss_format_to(sformat) >= 0)
ba71d227 915 goto format_found;
1da177e4 916 }
ba71d227
TI		 917 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
918 err = -EINVAL;
919 goto failure;
1da177e4 920 }
ba71d227 921 format_found:
fea952e5 922 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
7eaa943c
TI		 923 if (err < 0)
924 goto failure;
1da177e4
LT		 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,
fea952e5 931 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
1da177e4 932 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
fea952e5 933 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
1da177e4
LT		 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
ca0214ee
TI		 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
21a3479a 971#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 972 snd_pcm_oss_plugin_clear(substream);
973 if (!direct) {
974 /* add necessary plugins */
51c816fd
TI		 975 err = snd_pcm_plug_format_plugins(substream, params, sparams);
976 if (err < 0) {
61efcee8
TI		 977 pcm_dbg(substream->pcm,
978 "snd_pcm_plug_format_plugins failed: %i\n", err);
1da177e4
LT		 979 goto failure;
980 }
981 if (runtime->oss.plugin_first) {
6ac77bc1 982 struct snd_pcm_plugin *plugin;
51c816fd
TI		 983 err = snd_pcm_plugin_build_io(substream, sparams, &plugin);
984 if (err < 0) {
61efcee8
TI		 985 pcm_dbg(substream->pcm,
986 "snd_pcm_plugin_build_io failed: %i\n", err);
1da177e4
LT		 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 }
8a580a26 994 if (err < 0)
1da177e4 995 goto failure;
1da177e4
LT		 996 }
997 }
21a3479a 998#endif
1da177e4 999
1da177e4
LT		 1000 if (runtime->oss.trigger) {
1001 sw_params->start_threshold = 1;
1002 } else {
1003 sw_params->start_threshold = runtime->boundary;
1004 }
9c323fcb
TI		 1005 if (atomic_read(&substream->mmap_count) ||
1006 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 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;
004e6538
TI		 1012 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1013 1 : runtime->period_size;
9c323fcb 1014 if (atomic_read(&substream->mmap_count) ||
060d77b9 1015 substream->oss.setup.nosilence) {
1da177e4
LT		 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
51c816fd
TI		 1027 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params);
1028 if (err < 0) {
61efcee8 1029 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1da177e4
LT		 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));
7eaa943c
TI		 1035 if (oss_period_size < 0) {
1036 err = -EINVAL;
1037 goto failure;
1038 }
21a3479a 1039#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1040 if (runtime->oss.plugin_first) {
1041 err = snd_pcm_plug_alloc(substream, oss_period_size);
1042 if (err < 0)
1043 goto failure;
1044 }
21a3479a 1045#endif
efb6402c
TI		 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) {
7eaa943c
TI		 1049 err = -EINVAL;
1050 goto failure;
1051 }
1da177e4
LT		 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
65766ee0
TI		 1067 kvfree(runtime->oss.buffer);
1068 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
cbbb0570
RK		 1069 if (!runtime->oss.buffer) {
1070 err = -ENOMEM;
1071 goto failure;
1072 }
1073
1074 runtime->oss.params = 0;
1075 runtime->oss.prepare = 1;
1da177e4
LT		 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:
8a580a26
TI		 1084 if (err)
1085 snd_pcm_oss_release_buffers(substream);
1da177e4
LT		 1086 kfree(sw_params);
1087 kfree(params);
1088 kfree(sparams);
02a5d692
TI		 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);
e3a5d59a 1106 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1107 return err;
1108}
1109
6ac77bc1 1110static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1111{
1112 int idx, err;
6ac77bc1 1113 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 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) {
b2483716 1122 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1123 if (err < 0)
1124 return err;
1125 }
1126 }
7eaa943c
TI		 1127 if (!asubstream)
1128 return -EIO;
1da177e4
LT		 1129 if (r_substream)
1130 *r_substream = asubstream;
1131 return 0;
1132}
1133
02a5d692 1134/* call with params_lock held */
e15dc99d
TI		 1135/* NOTE: this always call PREPARE unconditionally no matter whether
1136 * runtime->oss.prepare is set or not
1137 */
6ac77bc1 1138static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1139{
1140 int err;
6ac77bc1 1141 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1142
1143 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1144 if (err < 0) {
61efcee8
TI		 1145 pcm_dbg(substream->pcm,
1146 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1da177e4
LT		 1147 return err;
1148 }
1149 runtime->oss.prepare = 0;
f240406b 1150 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1151 runtime->oss.period_ptr = 0;
1152 runtime->oss.buffer_used = 0;
1153
1154 return 0;
1155}
1156
6ac77bc1 1157static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1158{
6ac77bc1 1159 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1160 int err;
1161
1da177e4
LT		 1162 runtime = substream->runtime;
1163 if (runtime->oss.params) {
b2483716 1164 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1165 if (err < 0)
1166 return err;
1167 }
02a5d692
TI		 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 }
1da177e4
LT		 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
6ac77bc1 1199static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1200{
6ac77bc1 1201 struct snd_pcm_runtime *runtime;
1da177e4
LT		 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
6ac77bc1 1224snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1225{
6ac77bc1 1226 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1227 int ret;
1228 while (1) {
f0061c18
TI		 1229 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1230 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1da177e4 1231#ifdef OSS_DEBUG
61efcee8
TI		 1232 pcm_dbg(substream->pcm,
1233 "pcm_oss: write: recovering from %s\n",
f0061c18 1234 runtime->state == SNDRV_PCM_STATE_XRUN ?
61efcee8 1235 "XRUN" : "SUSPEND");
1da177e4
LT		 1236#endif
1237 ret = snd_pcm_oss_prepare(substream);
1238 if (ret < 0)
1239 break;
1240 }
146f6697 1241 mutex_unlock(&runtime->oss.params_lock);
13f72c8c
TI		 1242 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1243 frames, in_kernel);
146f6697 1244 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 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 */
f0061c18 1249 if (runtime->state == SNDRV_PCM_STATE_PREPARED)
1da177e4
LT		 1250 return -EAGAIN;
1251 }
1252 return ret;
1253}
1254
6ac77bc1 1255snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1256{
6ac77bc1 1257 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1258 snd_pcm_sframes_t delay;
1259 int ret;
1260 while (1) {
f0061c18
TI		 1261 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1262 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1da177e4 1263#ifdef OSS_DEBUG
61efcee8
TI		 1264 pcm_dbg(substream->pcm,
1265 "pcm_oss: read: recovering from %s\n",
f0061c18 1266 runtime->state == SNDRV_PCM_STATE_XRUN ?
61efcee8 1267 "XRUN" : "SUSPEND");
1da177e4
LT		 1268#endif
1269 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1270 if (ret < 0)
1271 break;
f0061c18 1272 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
1da177e4
LT		 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;
146f6697 1280 mutex_unlock(&runtime->oss.params_lock);
13f72c8c
TI		 1281 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1282 frames, in_kernel);
146f6697 1283 mutex_lock(&runtime->oss.params_lock);
1da177e4 1284 if (ret == -EPIPE) {
f0061c18 1285 if (runtime->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4
LT		 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
fed5794f
TI		 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)
1da177e4 1300{
6ac77bc1 1301 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1302 int ret;
1303 while (1) {
f0061c18
TI		 1304 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1305 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1da177e4 1306#ifdef OSS_DEBUG
61efcee8
TI		 1307 pcm_dbg(substream->pcm,
1308 "pcm_oss: writev: recovering from %s\n",
f0061c18 1309 runtime->state == SNDRV_PCM_STATE_XRUN ?
61efcee8 1310 "XRUN" : "SUSPEND");
1da177e4
LT		 1311#endif
1312 ret = snd_pcm_oss_prepare(substream);
1313 if (ret < 0)
1314 break;
1315 }
fed5794f 1316 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1da177e4
LT		 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 */
f0061c18 1322 if (runtime->state == SNDRV_PCM_STATE_PREPARED)
1da177e4
LT		 1323 return -EAGAIN;
1324 }
1325 return ret;
1326}
1327
fed5794f 1328snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1da177e4 1329{
6ac77bc1 1330 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1331 int ret;
1332 while (1) {
f0061c18
TI		 1333 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1334 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1da177e4 1335#ifdef OSS_DEBUG
61efcee8
TI		 1336 pcm_dbg(substream->pcm,
1337 "pcm_oss: readv: recovering from %s\n",
f0061c18 1338 runtime->state == SNDRV_PCM_STATE_XRUN ?
61efcee8 1339 "XRUN" : "SUSPEND");
1da177e4
LT		 1340#endif
1341 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1342 if (ret < 0)
1343 break;
f0061c18 1344 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
1da177e4
LT		 1345 ret = snd_pcm_oss_prepare(substream);
1346 if (ret < 0)
1347 break;
1348 }
fed5794f 1349 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1da177e4
LT		 1350 if (ret != -EPIPE && ret != -ESTRPIPE)
1351 break;
1352 }
1353 return ret;
1354}
fed5794f 1355#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 1356
6ac77bc1 1357static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1358{
6ac77bc1 1359 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1360 snd_pcm_sframes_t frames, frames1;
21a3479a 1361#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1362 if (runtime->oss.plugin_first) {
6ac77bc1 1363 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1364 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1365 if (!in_kernel) {
fea952e5 1366 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1da177e4
LT		 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;
21a3479a
JK		 1378 } else
1379#endif
1380 {
1da177e4
LT		 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
6ac77bc1 1390static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1391{
1392 size_t xfer = 0;
5607dddb 1393 ssize_t tmp = 0;
6ac77bc1 1394 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1395
9c323fcb 1396 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1397 return -ENXIO;
1398
40cab6e8 1399 atomic_inc(&runtime->oss.rw_ref);
1da177e4 1400 while (bytes > 0) {
900498a3
TI		 1401 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1402 tmp = -ERESTARTSYS;
1403 break;
1404 }
02a5d692
TI		 1405 tmp = snd_pcm_oss_make_ready_locked(substream);
1406 if (tmp < 0)
1407 goto err;
1da177e4
LT		 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) {
e3a5d59a
TI		 1413 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1414 tmp = -EFAULT;
1415 goto err;
1416 }
1da177e4
LT		 1417 }
1418 runtime->oss.buffer_used += tmp;
1419 buf += tmp;
1420 bytes -= tmp;
1421 xfer += tmp;
060d77b9 1422 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 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)
e3a5d59a 1427 goto err;
1da177e4
LT		 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;
e3a5d59a
TI		 1434 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1435 tmp = -EAGAIN;
1436 goto err;
1437 }
1da177e4
LT		 1438 }
1439 } else {
4d23359b
CL		 1440 tmp = snd_pcm_oss_write2(substream,
1441 (const char __force *)buf,
1442 runtime->oss.period_bytes, 0);
1da177e4 1443 if (tmp <= 0)
e3a5d59a 1444 goto err;
1da177e4
LT		 1445 runtime->oss.bytes += tmp;
1446 buf += tmp;
1447 bytes -= tmp;
1448 xfer += tmp;
0df63e44 1449 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4 1450 tmp != runtime->oss.period_bytes)
900498a3 1451 tmp = -EAGAIN;
1da177e4 1452 }
e3a5d59a 1453 err:
900498a3
TI		 1454 mutex_unlock(&runtime->oss.params_lock);
1455 if (tmp < 0)
1456 break;
29159a4e
TI		 1457 if (signal_pending(current)) {
1458 tmp = -ERESTARTSYS;
900498a3 1459 break;
29159a4e 1460 }
900498a3 1461 tmp = 0;
1da177e4 1462 }
40cab6e8 1463 atomic_dec(&runtime->oss.rw_ref);
e3a5d59a 1464 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1465}
1466
6ac77bc1 1467static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1468{
6ac77bc1 1469 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1470 snd_pcm_sframes_t frames, frames1;
21a3479a 1471#ifdef CONFIG_SND_PCM_OSS_PLUGINS
fea952e5 1472 char __user *final_dst = (char __force __user *)buf;
1da177e4 1473 if (runtime->oss.plugin_first) {
6ac77bc1 1474 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 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;
21a3479a
JK		 1488 } else
1489#endif
1490 {
1da177e4
LT		 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
6ac77bc1 1500static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1501{
1502 size_t xfer = 0;
5607dddb 1503 ssize_t tmp = 0;
6ac77bc1 1504 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1505
9c323fcb 1506 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1507 return -ENXIO;
1508
40cab6e8 1509 atomic_inc(&runtime->oss.rw_ref);
1da177e4 1510 while (bytes > 0) {
900498a3
TI		 1511 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1512 tmp = -ERESTARTSYS;
1513 break;
1514 }
02a5d692
TI		 1515 tmp = snd_pcm_oss_make_ready_locked(substream);
1516 if (tmp < 0)
1517 goto err;
1da177e4
LT		 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)
e3a5d59a 1522 goto err;
1da177e4
LT		 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;
e3a5d59a
TI		 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 }
1da177e4
LT		 1534 buf += tmp;
1535 bytes -= tmp;
1536 xfer += tmp;
1537 runtime->oss.buffer_used -= tmp;
1538 } else {
4d23359b
CL		 1539 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1540 runtime->oss.period_bytes, 0);
1da177e4 1541 if (tmp <= 0)
e3a5d59a 1542 goto err;
1da177e4
LT		 1543 runtime->oss.bytes += tmp;
1544 buf += tmp;
1545 bytes -= tmp;
1546 xfer += tmp;
1547 }
e3a5d59a 1548 err:
900498a3
TI		 1549 mutex_unlock(&runtime->oss.params_lock);
1550 if (tmp < 0)
1551 break;
29159a4e
TI		 1552 if (signal_pending(current)) {
1553 tmp = -ERESTARTSYS;
900498a3 1554 break;
29159a4e 1555 }
900498a3 1556 tmp = 0;
1da177e4 1557 }
40cab6e8 1558 atomic_dec(&runtime->oss.rw_ref);
e3a5d59a 1559 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1560}
1561
6ac77bc1 1562static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1563{
6ac77bc1 1564 struct snd_pcm_substream *substream;
60686aa0
TI		 1565 struct snd_pcm_runtime *runtime;
1566 int i;
1da177e4 1567
60686aa0
TI		 1568 for (i = 0; i < 2; i++) {
1569 substream = pcm_oss_file->streams[i];
1570 if (!substream)
1571 continue;
1572 runtime = substream->runtime;
bf1bbb5a 1573 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
02a5d692 1574 mutex_lock(&runtime->oss.params_lock);
60686aa0
TI		 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;
02a5d692 1579 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1580 }
1581 return 0;
1582}
1583
6ac77bc1 1584static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1585{
6ac77bc1 1586 struct snd_pcm_substream *substream;
1da177e4
LT		 1587 int err;
1588
1589 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1590 if (substream != NULL) {
51c816fd
TI		 1591 err = snd_pcm_oss_make_ready(substream);
1592 if (err < 0)
1da177e4 1593 return err;
bf1bbb5a 1594 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 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
6ac77bc1 1601static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1602{
6ac77bc1 1603 struct snd_pcm_runtime *runtime;
1da177e4 1604 ssize_t result = 0;
fea952e5 1605 snd_pcm_state_t state;
1da177e4 1606 long res;
ac6424b9 1607 wait_queue_entry_t wait;
1da177e4
LT		 1608
1609 runtime = substream->runtime;
1610 init_waitqueue_entry(&wait, current);
1611 add_wait_queue(&runtime->sleep, &wait);
1612#ifdef OSS_DEBUG
61efcee8 1613 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1da177e4
LT		 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);
650224fe
TI		 1626 scoped_guard(pcm_stream_lock_irq, substream)
1627 state = runtime->state;
fea952e5 1628 if (state != SNDRV_PCM_STATE_RUNNING) {
1da177e4
LT		 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) {
61efcee8
TI		 1638 pcm_err(substream->pcm,
1639 "OSS sync error - DMA timeout\n");
1da177e4
LT		 1640 result = -EIO;
1641 break;
1642 }
1643 }
1644 remove_wait_queue(&runtime->sleep, &wait);
1645 return result;
1646}
1647
6ac77bc1 1648static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1649{
1650 int err = 0;
1651 unsigned int saved_f_flags;
6ac77bc1
TI		 1652 struct snd_pcm_substream *substream;
1653 struct snd_pcm_runtime *runtime;
1da177e4
LT		 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;
9c323fcb 1661 if (atomic_read(&substream->mmap_count))
1da177e4 1662 goto __direct;
40cab6e8
TI		 1663 atomic_inc(&runtime->oss.rw_ref);
1664 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1665 atomic_dec(&runtime->oss.rw_ref);
02a5d692 1666 return -ERESTARTSYS;
40cab6e8 1667 }
8423f0b6
TI		 1668 err = snd_pcm_oss_make_ready_locked(substream);
1669 if (err < 0)
1670 goto unlock;
1da177e4
LT		 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
61efcee8 1675 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1da177e4
LT		 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);
40cab6e8
TI		 1682 if (err < 0)
1683 goto unlock;
1da177e4
LT		 1684 } else if (runtime->oss.period_ptr > 0) {
1685#ifdef OSS_DEBUG
61efcee8 1686 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1da177e4
LT		 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);
40cab6e8
TI		 1693 if (err < 0)
1694 goto unlock;
1da177e4
LT		 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;
13f72c8c
TI		 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);
1da177e4 1707 }
40cab6e8 1708unlock:
e3a5d59a 1709 mutex_unlock(&runtime->oss.params_lock);
40cab6e8
TI		 1710 atomic_dec(&runtime->oss.rw_ref);
1711 if (err < 0)
1712 return err;
1da177e4
LT		 1713 /*
1714 * finish sync: drain the buffer
1715 */
1716 __direct:
0df63e44
TI		 1717 saved_f_flags = substream->f_flags;
1718 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1719 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1720 substream->f_flags = saved_f_flags;
1da177e4
LT		 1721 if (err < 0)
1722 return err;
02a5d692 1723 mutex_lock(&runtime->oss.params_lock);
1da177e4 1724 runtime->oss.prepare = 1;
02a5d692 1725 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1726 }
1727
1728 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1729 if (substream != NULL) {
51c816fd
TI		 1730 err = snd_pcm_oss_make_ready(substream);
1731 if (err < 0)
1da177e4
LT		 1732 return err;
1733 runtime = substream->runtime;
bf1bbb5a 1734 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1735 if (err < 0)
1736 return err;
02a5d692 1737 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1738 runtime->oss.buffer_used = 0;
1739 runtime->oss.prepare = 1;
02a5d692 1740 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1741 }
1742 return 0;
1743}
1744
6ac77bc1 1745static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1746{
1747 int idx;
1748
1749 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1750 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1751 struct snd_pcm_runtime *runtime;
f6d297df
TI		 1752 int err;
1753
1da177e4
LT		 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;
f6d297df
TI		 1761 err = lock_params(runtime);
1762 if (err < 0)
1763 return err;
1da177e4
LT		 1764 if (runtime->oss.rate != rate) {
1765 runtime->oss.params = 1;
1766 runtime->oss.rate = rate;
1767 }
f6d297df 1768 unlock_params(runtime);
1da177e4
LT		 1769 }
1770 return snd_pcm_oss_get_rate(pcm_oss_file);
1771}
1772
6ac77bc1 1773static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1774{
6ac77bc1 1775 struct snd_pcm_substream *substream;
1da177e4
LT		 1776 int err;
1777
51c816fd
TI		 1778 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1779 if (err < 0)
1da177e4
LT		 1780 return err;
1781 return substream->runtime->oss.rate;
1782}
1783
6ac77bc1 1784static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 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) {
6ac77bc1
TI		 1792 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1793 struct snd_pcm_runtime *runtime;
f6d297df
TI		 1794 int err;
1795
1da177e4
LT		 1796 if (substream == NULL)
1797 continue;
1798 runtime = substream->runtime;
f6d297df
TI		 1799 err = lock_params(runtime);
1800 if (err < 0)
1801 return err;
1da177e4
LT		 1802 if (runtime->oss.channels != channels) {
1803 runtime->oss.params = 1;
1804 runtime->oss.channels = channels;
1805 }
f6d297df 1806 unlock_params(runtime);
1da177e4
LT		 1807 }
1808 return snd_pcm_oss_get_channels(pcm_oss_file);
1809}
1810
6ac77bc1 1811static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1812{
6ac77bc1 1813 struct snd_pcm_substream *substream;
1da177e4
LT		 1814 int err;
1815
51c816fd
TI		 1816 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1817 if (err < 0)
1da177e4
LT		 1818 return err;
1819 return substream->runtime->oss.channels;
1820}
1821
6ac77bc1 1822static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1823{
6ac77bc1 1824 struct snd_pcm_substream *substream;
1da177e4
LT		 1825 int err;
1826
51c816fd
TI		 1827 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1828 if (err < 0)
1da177e4
LT		 1829 return err;
1830 return substream->runtime->oss.period_bytes;
1831}
1832
6ac77bc1 1833static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1834{
6ac77bc1 1835 struct snd_pcm_substream *substream;
1da177e4
LT		 1836 int err;
1837 int direct;
a55bc334 1838 struct snd_pcm_hw_params *params __free(kfree) = NULL;
1da177e4 1839 unsigned int formats = 0;
e76bf3c4 1840 const struct snd_mask *format_mask;
1da177e4
LT		 1841 int fmt;
1842
51c816fd
TI		 1843 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1844 if (err < 0)
1da177e4 1845 return err;
9c323fcb 1846 if (atomic_read(&substream->mmap_count))
1da177e4 1847 direct = 1;
060d77b9
TI		 1848 else
1849 direct = substream->oss.setup.direct;
1da177e4
LT		 1850 if (!direct)
1851 return AFMT_MU_LAW | AFMT_U8 |
1852 AFMT_S16_LE | AFMT_S16_BE |
1853 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1854 AFMT_U16_BE |
1855 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1856 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1857 AFMT_S24_PACKED;
1da177e4
LT		 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);
7eaa943c 1863 if (err < 0)
a55bc334 1864 return err;
01c0b426 1865 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4 1866 for (fmt = 0; fmt < 32; ++fmt) {
e76bf3c4 1867 if (snd_mask_test(format_mask, fmt)) {
f8b6c0cf 1868 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1da177e4
LT		 1869 if (f >= 0)
1870 formats |= f;
1871 }
1872 }
01c0b426 1873
a55bc334 1874 return formats;
1da177e4
LT		 1875}
1876
6ac77bc1 1877static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1878{
1879 int formats, idx;
f6d297df 1880 int err;
1da177e4
LT		 1881
1882 if (format != AFMT_QUERY) {
1883 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1884 if (formats < 0)
1885 return formats;
1da177e4
LT		 1886 if (!(formats & format))
1887 format = AFMT_U8;
1888 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1889 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1890 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1891 if (substream == NULL)
1892 continue;
1893 runtime = substream->runtime;
f6d297df
TI		 1894 err = lock_params(runtime);
1895 if (err < 0)
1896 return err;
1da177e4
LT		 1897 if (runtime->oss.format != format) {
1898 runtime->oss.params = 1;
1899 runtime->oss.format = format;
1900 }
f6d297df 1901 unlock_params(runtime);
1da177e4
LT		 1902 }
1903 }
1904 return snd_pcm_oss_get_format(pcm_oss_file);
1905}
1906
6ac77bc1 1907static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1908{
6ac77bc1 1909 struct snd_pcm_substream *substream;
1da177e4
LT		 1910 int err;
1911
51c816fd
TI		 1912 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1913 if (err < 0)
1da177e4
LT		 1914 return err;
1915 return substream->runtime->oss.format;
1916}
1917
6ac77bc1 1918static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1919{
6ac77bc1 1920 struct snd_pcm_runtime *runtime;
1da177e4 1921
1da177e4
LT		 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
6ac77bc1 1939static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1940{
1941 int err = -EINVAL, idx;
1942
1943 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1944 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
02a5d692
TI		 1945 struct snd_pcm_runtime *runtime;
1946
1da177e4
LT		 1947 if (substream == NULL)
1948 continue;
02a5d692 1949 runtime = substream->runtime;
f6d297df
TI		 1950 err = lock_params(runtime);
1951 if (err < 0)
1952 return err;
02a5d692 1953 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
f6d297df 1954 unlock_params(runtime);
02a5d692 1955 if (err < 0)
1da177e4
LT		 1956 return err;
1957 }
1958 return err;
1959}
1960
6ac77bc1 1961static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1962{
6ac77bc1 1963 struct snd_pcm_runtime *runtime;
175b8d89 1964 int fragshift;
1da177e4 1965
1da177e4
LT		 1966 runtime = substream->runtime;
1967 if (runtime->oss.subdivision || runtime->oss.fragshift)
1968 return -EINVAL;
175b8d89 1969 fragshift = val & 0xffff;
8839c8c0 1970 if (fragshift >= 25) /* should be large enough */
175b8d89
TI		 1971 return -EINVAL;
1972 runtime->oss.fragshift = fragshift;
1da177e4
LT		 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
6ac77bc1 1982static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1983{
1984 int err = -EINVAL, idx;
1985
1986 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1987 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
02a5d692
TI		 1988 struct snd_pcm_runtime *runtime;
1989
1da177e4
LT		 1990 if (substream == NULL)
1991 continue;
02a5d692 1992 runtime = substream->runtime;
f6d297df
TI		 1993 err = lock_params(runtime);
1994 if (err < 0)
1995 return err;
02a5d692 1996 err = snd_pcm_oss_set_fragment1(substream, val);
f6d297df 1997 unlock_params(runtime);
02a5d692 1998 if (err < 0)
1da177e4
LT		 1999 return err;
2000 }
2001 return err;
2002}
2003
2004static int snd_pcm_oss_nonblock(struct file * file)
2005{
db1dd4d3 2006 spin_lock(&file->f_lock);
1da177e4 2007 file->f_flags |= O_NONBLOCK;
db1dd4d3 2008 spin_unlock(&file->f_lock);
1da177e4
LT		 2009 return 0;
2010}
2011
6ac77bc1 2012static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 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 {
6ac77bc1 2028 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 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
6ac77bc1 2036static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 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++) {
6ac77bc1 2042 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 2043 result = snd_pcm_oss_get_caps1(substream, result);
2044 }
2045 result |= 0x0001; /* revision - same as SB AWE 64 */
2046 return result;
2047}
2048
f240406b
JK		 2049static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2050 snd_pcm_uframes_t hw_ptr)
1da177e4 2051{
6ac77bc1 2052 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 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
6ac77bc1 2059static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 2060{
6ac77bc1
TI		 2061 struct snd_pcm_runtime *runtime;
2062 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2063 int err, cmd;
2064
2065#ifdef OSS_DEBUG
8e7daf31 2066 pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 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) {
51c816fd
TI		 2073 err = snd_pcm_oss_make_ready(psubstream);
2074 if (err < 0)
1da177e4
LT		 2075 return err;
2076 }
2077 if (csubstream) {
51c816fd
TI		 2078 err = snd_pcm_oss_make_ready(csubstream);
2079 if (err < 0)
1da177e4
LT		 2080 return err;
2081 }
2082 if (psubstream) {
2083 runtime = psubstream->runtime;
02a5d692
TI		 2084 cmd = 0;
2085 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2086 return -ERESTARTSYS;
1da177e4
LT		 2087 if (trigger & PCM_ENABLE_OUTPUT) {
2088 if (runtime->oss.trigger)
2089 goto _skip1;
9c323fcb 2090 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 2091 snd_pcm_oss_simulate_fill(psubstream,
2092 get_hw_ptr_period(runtime));
1da177e4
LT		 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 }
1da177e4 2104 _skip1:
02a5d692
TI		 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 }
1da177e4
LT		 2112 if (csubstream) {
2113 runtime = csubstream->runtime;
02a5d692
TI		 2114 cmd = 0;
2115 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2116 return -ERESTARTSYS;
1da177e4
LT		 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 }
1da177e4 2131 _skip2:
02a5d692
TI		 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 }
1da177e4
LT		 2139 return 0;
2140}
2141
6ac77bc1 2142static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2143{
6ac77bc1 2144 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 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
6ac77bc1 2156static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2157{
6ac77bc1
TI		 2158 struct snd_pcm_substream *substream;
2159 struct snd_pcm_runtime *runtime;
1da177e4
LT		 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;
51c816fd
TI		 2166 err = snd_pcm_oss_make_ready(substream);
2167 if (err < 0)
1da177e4
LT		 2168 return err;
2169 runtime = substream->runtime;
2170 if (runtime->oss.params || runtime->oss.prepare)
2171 return 0;
bf1bbb5a 2172 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 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
6ac77bc1 2180static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2181{
6ac77bc1
TI		 2182 struct snd_pcm_substream *substream;
2183 struct snd_pcm_runtime *runtime;
1da177e4
LT		 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;
51c816fd
TI		 2194 err = snd_pcm_oss_make_ready(substream);
2195 if (err < 0)
1da177e4
LT		 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);
9c323fcb 2220 if (atomic_read(&substream->mmap_count)) {
1da177e4 2221 snd_pcm_sframes_t n;
f240406b
JK		 2222 delay = get_hw_ptr_period(runtime);
2223 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2224 if (n < 0)
2225 n += runtime->boundary;
2226 info.blocks = n / runtime->period_size;
f240406b 2227 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 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 {
5ac0fab9 2232 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2233 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2234 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2235 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2236 else
2237 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2238 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2239 } else {
5ac0fab9
JK		 2240 delay += fixup;
2241 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2242 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2243 }
1da177e4
LT		 2244 }
2245 if (copy_to_user(_info, &info, sizeof(info)))
2246 return -EFAULT;
2247 return 0;
2248}
2249
6ac77bc1 2250static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2251{
6ac77bc1
TI		 2252 struct snd_pcm_substream *substream;
2253 struct snd_pcm_runtime *runtime;
1da177e4
LT		 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
51c816fd
TI		 2266 if (runtime->oss.params) {
2267 err = snd_pcm_oss_change_params(substream, false);
2268 if (err < 0)
2269 return err;
2270 }
1da177e4
LT		 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
61efcee8
TI		 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);
1da177e4
LT		 2307#endif
2308 if (copy_to_user(_info, &info, sizeof(info)))
2309 return -EFAULT;
2310 return 0;
2311}
2312
6ac77bc1 2313static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2314{
2315 // it won't be probably implemented
61efcee8 2316 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
1da177e4
LT		 2317 return -EINVAL;
2318}
2319
060d77b9 2320static const char *strip_task_path(const char *path)
1da177e4 2321{
060d77b9
TI		 2322 const char *ptr, *ptrl = NULL;
2323 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2324 if (*ptr == '/')
2325 ptrl = ptr + 1;
1da177e4 2326 }
060d77b9
TI		 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
3923de04 2336 guard(mutex)(&pcm->streams[stream].oss.setup_mutex);
060d77b9
TI		 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;
1da177e4 2342 }
060d77b9
TI		 2343 } while ((task_name = strip_task_path(task_name)) != NULL);
2344 out:
2345 if (setup)
2346 *rsetup = *setup;
1da177e4
LT		 2347}
2348
3bf75f9b
TI		 2349static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2350{
8a580a26 2351 snd_pcm_oss_release_buffers(substream);
3bf75f9b
TI		 2352 substream->oss.oss = 0;
2353}
2354
6ac77bc1
TI		 2355static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2356 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2357 int minor)
2358{
6ac77bc1 2359 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2360
2361 substream->oss.oss = 1;
060d77b9 2362 substream->oss.setup = *setup;
3bf75f9b 2363 if (setup->nonblock)
0df63e44 2364 substream->f_flags |= O_NONBLOCK;
1576274d 2365 else if (setup->block)
0df63e44 2366 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2367 runtime = substream->runtime;
2368 runtime->oss.params = 1;
2369 runtime->oss.trigger = 1;
2370 runtime->oss.rate = 8000;
e3a5d59a 2371 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 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;
3bf75f9b 2386 substream->pcm_release = snd_pcm_oss_release_substream;
40cab6e8 2387 atomic_set(&runtime->oss.rw_ref, 0);
1da177e4
LT		 2388}
2389
6ac77bc1 2390static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2391{
2392 int cidx;
7eaa943c
TI		 2393 if (!pcm_oss_file)
2394 return 0;
1da177e4 2395 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2396 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2397 if (substream)
2398 snd_pcm_release_substream(substream);
1da177e4
LT		 2399 }
2400 kfree(pcm_oss_file);
2401 return 0;
2402}
2403
2404static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2405 struct snd_pcm *pcm,
2406 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2407 int minor,
060d77b9 2408 struct snd_pcm_oss_setup *setup)
1da177e4 2409{
3bf75f9b 2410 int idx, err;
6ac77bc1 2411 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2412 struct snd_pcm_substream *substream;
aeb5d727 2413 fmode_t f_mode = file->f_mode;
1da177e4 2414
7eaa943c
TI		 2415 if (rpcm_oss_file)
2416 *rpcm_oss_file = NULL;
1da177e4 2417
ca2c0966 2418 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 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;
3bf75f9b 2425
0df63e44 2426 file->f_flags &= ~O_APPEND;
3bf75f9b 2427 for (idx = 0; idx < 2; idx++) {
060d77b9 2428 if (setup[idx].disable)
3bf75f9b 2429 continue;
6cb53e7e
TI		 2430 if (! pcm->streams[idx].substream_count)
2431 continue; /* no matching substream */
3bf75f9b
TI		 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) {
1da177e4
LT		 2441 snd_pcm_oss_release_file(pcm_oss_file);
2442 return err;
2443 }
3bf75f9b
TI		 2444
2445 pcm_oss_file->streams[idx] = substream;
060d77b9 2446 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2447 }
2448
bbdc1b7d 2449 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2450 snd_pcm_oss_release_file(pcm_oss_file);
2451 return -EINVAL;
2452 }
1da177e4
LT		 2453
2454 file->private_data = pcm_oss_file;
7eaa943c
TI		 2455 if (rpcm_oss_file)
2456 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2457 return 0;
2458}
2459
2460
93f2e378
TI		 2461static int snd_task_name(struct task_struct *task, char *name, size_t size)
2462{
2463 unsigned int idx;
2464
7eaa943c
TI		 2465 if (snd_BUG_ON(!task || !name || size < 2))
2466 return -EINVAL;
93f2e378
TI		 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
1da177e4
LT		 2473static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2474{
1da177e4
LT		 2475 int err;
2476 char task_name[32];
6ac77bc1
TI		 2477 struct snd_pcm *pcm;
2478 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2479 struct snd_pcm_oss_setup setup[2];
1da177e4 2480 int nonblock;
ac6424b9 2481 wait_queue_entry_t wait;
1da177e4 2482
02f4865f
TI		 2483 err = nonseekable_open(inode, file);
2484 if (err < 0)
2485 return err;
2486
f87135f5
CL		 2487 pcm = snd_lookup_oss_minor_data(iminor(inode),
2488 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 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 }
1576274d 2504 memset(setup, 0, sizeof(setup));
1da177e4 2505 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2506 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2507 task_name, &setup[0]);
1da177e4 2508 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2509 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2510 task_name, &setup[1]);
1da177e4
LT		 2511
2512 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2513 if (!nonblock)
2514 nonblock = nonblock_open;
2515
2516 init_waitqueue_entry(&wait, current);
2517 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2518 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2519 while (1) {
2520 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2521 iminor(inode), setup);
1da177e4
LT		 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);
1a60d4c5 2532 mutex_unlock(&pcm->open_mutex);
1da177e4 2533 schedule();
1a60d4c5 2534 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2535 if (pcm->card->shutdown) {
2536 err = -ENODEV;
2537 break;
2538 }
1da177e4
LT		 2539 if (signal_pending(current)) {
2540 err = -ERESTARTSYS;
2541 break;
2542 }
2543 }
2544 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2545 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2546 if (err < 0)
2547 goto __error;
8bb4d9ce 2548 snd_card_unref(pcm->card);
1da177e4
LT		 2549 return err;
2550
2551 __error:
2552 module_put(pcm->card->module);
2553 __error2:
2554 snd_card_file_remove(pcm->card, file);
2555 __error1:
a0830dbd
TI		 2556 if (pcm)
2557 snd_card_unref(pcm->card);
1da177e4
LT		 2558 return err;
2559}
2560
2561static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2562{
6ac77bc1
TI		 2563 struct snd_pcm *pcm;
2564 struct snd_pcm_substream *substream;
2565 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 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];
7eaa943c
TI		 2571 if (snd_BUG_ON(!substream))
2572 return -ENXIO;
1da177e4 2573 pcm = substream->pcm;
de1b8b93
TI		 2574 if (!pcm->card->shutdown)
2575 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2576 mutex_lock(&pcm->open_mutex);
1da177e4 2577 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2578 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 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{
6ac77bc1 2587 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 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);
658355b5 2596#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
1da177e4 2597 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2598 struct snd_pcm_substream *substream;
1da177e4
LT		 2599 int idx;
2600 for (idx = 0; idx < 2; ++idx) {
2601 substream = pcm_oss_file->streams[idx];
2602 if (substream != NULL)
2603 break;
2604 }
7eaa943c
TI		 2605 if (snd_BUG_ON(idx >= 2))
2606 return -ENXIO;
1da177e4
LT		 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
61efcee8 2613 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 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;
51c816fd
TI		 2623 res = snd_pcm_oss_set_rate(pcm_oss_file, res);
2624 if (res < 0)
1da177e4
LT		 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;
51c816fd
TI		 2636 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2637 if (res < 0)
1da177e4
LT		 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:
61efcee8 2742 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
1da177e4
LT		 2743 }
2744 return -EINVAL;
2745}
2746
2747#ifdef CONFIG_COMPAT
2748/* all compatible */
83266b6b
TI		 2749static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2750 unsigned long arg)
2751{
2022ca0a
AB		 2752 /*
2753 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2754 * which are not implemented for the native case either
2755 */
83266b6b
TI		 2756 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2757}
1da177e4
LT		 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{
6ac77bc1
TI		 2764 struct snd_pcm_oss_file *pcm_oss_file;
2765 struct snd_pcm_substream *substream;
1da177e4
LT		 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;
0df63e44 2771 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 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);
61efcee8
TI		 2777 pcm_dbg(substream->pcm,
2778 "pcm_oss: read %li bytes (returned %li bytes)\n",
2779 (long)count, (long)res);
1da177e4
LT		 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{
6ac77bc1
TI		 2787 struct snd_pcm_oss_file *pcm_oss_file;
2788 struct snd_pcm_substream *substream;
1da177e4
LT		 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;
0df63e44 2795 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2796 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2797#ifdef OSS_DEBUG
61efcee8 2798 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
006de267 2799 (long)count, (long)result);
1da177e4
LT		 2800#endif
2801 return result;
2802}
2803
6ac77bc1 2804static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2805{
6ac77bc1 2806 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2807 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2808 return runtime->oss.prev_hw_ptr_period !=
2809 get_hw_ptr_period(runtime);
1da177e4 2810 else
f240406b
JK		 2811 return snd_pcm_playback_avail(runtime) >=
2812 runtime->oss.period_frames;
1da177e4
LT		 2813}
2814
6ac77bc1 2815static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2816{
6ac77bc1 2817 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2818 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2819 return runtime->oss.prev_hw_ptr_period !=
2820 get_hw_ptr_period(runtime);
1da177e4 2821 else
f240406b
JK		 2822 return snd_pcm_capture_avail(runtime) >=
2823 runtime->oss.period_frames;
1da177e4
LT		 2824}
2825
680ef72a 2826static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
1da177e4 2827{
6ac77bc1 2828 struct snd_pcm_oss_file *pcm_oss_file;
680ef72a 2829 __poll_t mask;
6ac77bc1 2830 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 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) {
6ac77bc1 2839 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4 2840 poll_wait(file, &runtime->sleep, wait);
650224fe
TI		 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 }
1da177e4
LT		 2847 }
2848 if (csubstream != NULL) {
6ac77bc1
TI		 2849 struct snd_pcm_runtime *runtime = csubstream->runtime;
2850 snd_pcm_state_t ostate;
1da177e4 2851 poll_wait(file, &runtime->sleep, wait);
650224fe
TI		 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 }
1da177e4 2858 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2859 struct snd_pcm_oss_file ofile;
1da177e4
LT		 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{
6ac77bc1
TI		 2872 struct snd_pcm_oss_file *pcm_oss_file;
2873 struct snd_pcm_substream *substream = NULL;
2874 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2875 int err;
2876
2877#ifdef OSS_DEBUG
61efcee8 2878 pr_debug("pcm_oss: mmap begin\n");
1da177e4
LT		 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;
c0dbbdad 2886 fallthrough;
1da177e4
LT		 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) */
1c71222e 2898 vm_flags_set(area, VM_READ);
1da177e4
LT		 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) {
b2483716 2910 /* use mutex_trylock() for params_lock for avoiding a deadlock
c1e8d7c6 2911 * between mmap_lock and params_lock taken by
b2483716
TI		 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)
1da177e4
LT		 2916 return err;
2917 }
21a3479a 2918#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2919 if (runtime->oss.plugin_first != NULL)
2920 return -EIO;
21a3479a 2921#endif
1da177e4
LT		 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
61efcee8 2933 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
006de267 2934 runtime->oss.mmap_bytes);
1da177e4
LT		 2935#endif
2936 /* In mmap mode we never stop */
2937 runtime->stop_threshold = runtime->boundary;
2938
2939 return 0;
2940}
2941
b7d90a35 2942#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2943/*
2944 * /proc interface
2945 */
2946
6ac77bc1
TI		 2947static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2948 struct snd_info_buffer *buffer)
1da177e4 2949{
6ac77bc1
TI		 2950 struct snd_pcm_str *pstr = entry->private_data;
2951 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
3923de04 2952 guard(mutex)(&pstr->oss.setup_mutex);
1da177e4
LT		 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 }
1da177e4
LT		 2966}
2967
6ac77bc1 2968static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2969{
6ac77bc1 2970 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2971
1da177e4
LT		 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
6ac77bc1
TI		 2981static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2982 struct snd_info_buffer *buffer)
1da177e4 2983{
6ac77bc1 2984 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2985 char line[128], str[32], task_name[32];
2986 const char *ptr;
1da177e4 2987 int idx1;
6ac77bc1 2988 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2989
2990 while (!snd_info_get_line(buffer, line, sizeof(line))) {
3923de04 2991 guard(mutex)(&pstr->oss.setup_mutex);
1da177e4
LT		 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);
1da177e4
LT		 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;
10f69f9e
TI		 3027 } else if (!strcmp(str, "buggy-ptr")) {
3028 template.buggyptr = 1;
1da177e4
LT		 3029 }
3030 } while (*str);
3031 if (setup == NULL) {
060d77b9
TI		 3032 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3033 if (! setup) {
3034 buffer->error = -ENOMEM;
060d77b9
TI		 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);
1da177e4 3047 buffer->error = -ENOMEM;
060d77b9 3048 return;
1da177e4
LT		 3049 }
3050 }
060d77b9 3051 *setup = template;
1da177e4
LT		 3052 }
3053}
3054
6ac77bc1 3055static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 3056{
3057 int stream;
3058 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 3059 struct snd_info_entry *entry;
3060 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 3061 if (pstr->substream_count == 0)
3062 continue;
51c816fd
TI		 3063 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root);
3064 if (entry) {
1da177e4 3065 entry->content = SNDRV_INFO_CONTENT_TEXT;
6a73cf46 3066 entry->mode = S_IFREG | 0644;
1da177e4 3067 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 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
6ac77bc1 3079static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 3080{
3081 int stream;
3082 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 3083 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 3084 snd_info_free_entry(pstr->oss.proc_entry);
3085 pstr->oss.proc_entry = NULL;
3086 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 3087 }
3088}
b7d90a35 3089#else /* !CONFIG_SND_VERBOSE_PROCFS */
940ba1f5
AB		 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}
b7d90a35 3096#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 3097
3098/*
3099 * ENTRY functions
3100 */
3101
9c2e08c5 3102static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 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,
02f4865f 3109 .llseek = no_llseek,
1da177e4
LT		 3110 .poll = snd_pcm_oss_poll,
3111 .unlocked_ioctl = snd_pcm_oss_ioctl,
3112 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3113 .mmap = snd_pcm_oss_mmap,
3114};
3115
6ac77bc1 3116static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4 3117{
1da177e4 3118 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 3119 pcm->card, index, &snd_pcm_oss_f_reg,
80d7d771 3120 pcm) < 0) {
61efcee8 3121 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
d3d579f8 3122 pcm->card->number, pcm->device);
1da177e4
LT		 3123 }
3124}
3125
6ac77bc1 3126static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 3127{
3128 pcm->oss.reg = 0;
896e6cc2 3129 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3130 char name[128];
3131 int duplex;
3132 register_oss_dsp(pcm, 0);
3133 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3134 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3135 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3136 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3137#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3138 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3139 pcm->card->number,
3140 name);
3141#endif
3142 pcm->oss.reg++;
3143 pcm->oss.reg_mask |= 1;
3144 }
896e6cc2 3145 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3146 register_oss_dsp(pcm, 1);
3147 pcm->oss.reg++;
3148 pcm->oss.reg_mask |= 2;
3149 }
3150
3151 if (pcm->oss.reg)
3152 snd_pcm_oss_proc_init(pcm);
3153
3154 return 0;
3155}
3156
6ac77bc1 3157static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3158{
3159 if (pcm->oss.reg) {
3160 if (pcm->oss.reg_mask & 1) {
3161 pcm->oss.reg_mask &= ~1;
3162 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3163 pcm->card, 0);
3164 }
3165 if (pcm->oss.reg_mask & 2) {
3166 pcm->oss.reg_mask &= ~2;
3167 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3168 pcm->card, 1);
3169 }
896e6cc2 3170 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3171#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3172 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3173#endif
3174 }
3175 pcm->oss.reg = 0;
1da177e4
LT		 3176 }
3177 return 0;
3178}
3179
c461482c
TI		 3180static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3181{
3182 snd_pcm_oss_disconnect_minor(pcm);
3183 snd_pcm_oss_proc_done(pcm);
3184 return 0;
3185}
3186
6ac77bc1 3187static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3188{
3189 .n_register = snd_pcm_oss_register_minor,
3190 .n_disconnect = snd_pcm_oss_disconnect_minor,
3191 .n_unregister = snd_pcm_oss_unregister_minor,
3192};
3193
3194static int __init alsa_pcm_oss_init(void)
3195{
3196 int i;
3197 int err;
3198
3199 /* check device map table */
3200 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3201 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3202 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
d3d579f8 3203 i, dsp_map[i]);
1da177e4
LT		 3204 dsp_map[i] = 0;
3205 }
896e6cc2 3206 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3207 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
d3d579f8 3208 i, adsp_map[i]);
1da177e4
LT		 3209 adsp_map[i] = 1;
3210 }
3211 }
51c816fd
TI		 3212 err = snd_pcm_notify(&snd_pcm_oss_notify, 0);
3213 if (err < 0)
1da177e4
LT		 3214 return err;
3215 return 0;
3216}
3217
3218static void __exit alsa_pcm_oss_exit(void)
3219{
3220 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3221}
3222
3223module_init(alsa_pcm_oss_init)
3224module_exit(alsa_pcm_oss_exit)
Linux 6.x block layer and io_uring tree(s)