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ALSA: pcm: Use ERESTARTSYS instead of EINTR in OSS emulation
[mirror_ubuntu-bionic-kernel.git] / sound / core / oss / pcm_oss.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
1da177e4 29#include <linux/init.h>
1da177e4 30#include <linux/slab.h>
174cd4b1 31#include <linux/sched/signal.h>
1da177e4
LT		 32#include <linux/time.h>
33#include <linux/vmalloc.h>
65a77217 34#include <linux/module.h>
3f7440a6 35#include <linux/math64.h>
543537bd 36#include <linux/string.h>
83266b6b 37#include <linux/compat.h>
1da177e4
LT		 38#include <sound/core.h>
39#include <sound/minors.h>
40#include <sound/pcm.h>
41#include <sound/pcm_params.h>
42#include "pcm_plugin.h"
43#include <sound/info.h>
44#include <linux/soundcard.h>
45#include <sound/initval.h>
fea952e5 46#include <sound/mixer_oss.h>
1da177e4
LT		 47
48#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
49
6581f4e7 50static int dsp_map[SNDRV_CARDS];
1da177e4 51static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
a67ff6a5 52static bool nonblock_open = 1;
1da177e4 53
c1017a4c 54MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
1da177e4
LT		 55MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
56MODULE_LICENSE("GPL");
57module_param_array(dsp_map, int, NULL, 0444);
58MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
59module_param_array(adsp_map, int, NULL, 0444);
60MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
61module_param(nonblock_open, bool, 0644);
62MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
63MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
64MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
65
6ac77bc1
TI		 66static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
67static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
68static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
1da177e4 69
e88e8ae6
TI		 70/*
71 * helper functions to process hw_params
72 */
73static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
74{
75 int changed = 0;
76 if (i->min < min) {
77 i->min = min;
78 i->openmin = openmin;
79 changed = 1;
80 } else if (i->min == min && !i->openmin && openmin) {
81 i->openmin = 1;
82 changed = 1;
83 }
84 if (i->integer) {
85 if (i->openmin) {
86 i->min++;
87 i->openmin = 0;
88 }
89 }
90 if (snd_interval_checkempty(i)) {
91 snd_interval_none(i);
92 return -EINVAL;
93 }
94 return changed;
95}
96
97static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
98{
99 int changed = 0;
100 if (i->max > max) {
101 i->max = max;
102 i->openmax = openmax;
103 changed = 1;
104 } else if (i->max == max && !i->openmax && openmax) {
105 i->openmax = 1;
106 changed = 1;
107 }
108 if (i->integer) {
109 if (i->openmax) {
110 i->max--;
111 i->openmax = 0;
112 }
113 }
114 if (snd_interval_checkempty(i)) {
115 snd_interval_none(i);
116 return -EINVAL;
117 }
118 return changed;
119}
120
121static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
122{
123 struct snd_interval t;
124 t.empty = 0;
125 t.min = t.max = val;
126 t.openmin = t.openmax = 0;
127 t.integer = 1;
128 return snd_interval_refine(i, &t);
129}
130
131/**
132 * snd_pcm_hw_param_value_min
133 * @params: the hw_params instance
134 * @var: parameter to retrieve
135 * @dir: pointer to the direction (-1,0,1) or NULL
136 *
137 * Return the minimum value for field PAR.
138 */
139static unsigned int
140snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
141 snd_pcm_hw_param_t var, int *dir)
142{
143 if (hw_is_mask(var)) {
144 if (dir)
145 *dir = 0;
146 return snd_mask_min(hw_param_mask_c(params, var));
147 }
148 if (hw_is_interval(var)) {
149 const struct snd_interval *i = hw_param_interval_c(params, var);
150 if (dir)
151 *dir = i->openmin;
152 return snd_interval_min(i);
153 }
154 return -EINVAL;
155}
156
157/**
158 * snd_pcm_hw_param_value_max
159 * @params: the hw_params instance
160 * @var: parameter to retrieve
161 * @dir: pointer to the direction (-1,0,1) or NULL
162 *
163 * Return the maximum value for field PAR.
164 */
165static unsigned int
166snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
167 snd_pcm_hw_param_t var, int *dir)
168{
169 if (hw_is_mask(var)) {
170 if (dir)
171 *dir = 0;
172 return snd_mask_max(hw_param_mask_c(params, var));
173 }
174 if (hw_is_interval(var)) {
175 const struct snd_interval *i = hw_param_interval_c(params, var);
176 if (dir)
177 *dir = - (int) i->openmax;
178 return snd_interval_max(i);
179 }
180 return -EINVAL;
181}
182
183static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
184 snd_pcm_hw_param_t var,
185 const struct snd_mask *val)
186{
187 int changed;
188 changed = snd_mask_refine(hw_param_mask(params, var), val);
189 if (changed) {
190 params->cmask |= 1 << var;
191 params->rmask |= 1 << var;
192 }
193 return changed;
194}
195
196static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
197 struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var,
199 const struct snd_mask *val)
200{
201 int changed = _snd_pcm_hw_param_mask(params, var, val);
202 if (changed < 0)
203 return changed;
204 if (params->rmask) {
205 int err = snd_pcm_hw_refine(pcm, params);
206 if (err < 0)
207 return err;
208 }
209 return 0;
210}
211
212static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
213 snd_pcm_hw_param_t var, unsigned int val,
214 int dir)
215{
216 int changed;
217 int open = 0;
218 if (dir) {
219 if (dir > 0) {
220 open = 1;
221 } else if (dir < 0) {
222 if (val > 0) {
223 open = 1;
224 val--;
225 }
226 }
227 }
228 if (hw_is_mask(var))
229 changed = snd_mask_refine_min(hw_param_mask(params, var),
230 val + !!open);
231 else if (hw_is_interval(var))
232 changed = snd_interval_refine_min(hw_param_interval(params, var),
233 val, open);
234 else
235 return -EINVAL;
236 if (changed) {
237 params->cmask |= 1 << var;
238 params->rmask |= 1 << var;
239 }
240 return changed;
241}
242
243/**
244 * snd_pcm_hw_param_min
245 * @pcm: PCM instance
246 * @params: the hw_params instance
247 * @var: parameter to retrieve
248 * @val: minimal value
249 * @dir: pointer to the direction (-1,0,1) or NULL
250 *
251 * Inside configuration space defined by PARAMS remove from PAR all
252 * values < VAL. Reduce configuration space accordingly.
253 * Return new minimum or -EINVAL if the configuration space is empty
254 */
255static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
256 struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int *dir)
259{
260 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
261 if (changed < 0)
262 return changed;
263 if (params->rmask) {
264 int err = snd_pcm_hw_refine(pcm, params);
265 if (err < 0)
266 return err;
267 }
268 return snd_pcm_hw_param_value_min(params, var, dir);
269}
270
271static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
272 snd_pcm_hw_param_t var, unsigned int val,
273 int dir)
274{
275 int changed;
276 int open = 0;
277 if (dir) {
278 if (dir < 0) {
279 open = 1;
280 } else if (dir > 0) {
281 open = 1;
282 val++;
283 }
284 }
285 if (hw_is_mask(var)) {
286 if (val == 0 && open) {
287 snd_mask_none(hw_param_mask(params, var));
288 changed = -EINVAL;
289 } else
290 changed = snd_mask_refine_max(hw_param_mask(params, var),
291 val - !!open);
292 } else if (hw_is_interval(var))
293 changed = snd_interval_refine_max(hw_param_interval(params, var),
294 val, open);
295 else
296 return -EINVAL;
297 if (changed) {
298 params->cmask |= 1 << var;
299 params->rmask |= 1 << var;
300 }
301 return changed;
302}
303
304/**
305 * snd_pcm_hw_param_max
306 * @pcm: PCM instance
307 * @params: the hw_params instance
308 * @var: parameter to retrieve
309 * @val: maximal value
310 * @dir: pointer to the direction (-1,0,1) or NULL
311 *
312 * Inside configuration space defined by PARAMS remove from PAR all
313 * values >= VAL + 1. Reduce configuration space accordingly.
314 * Return new maximum or -EINVAL if the configuration space is empty
315 */
316static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
317 struct snd_pcm_hw_params *params,
318 snd_pcm_hw_param_t var, unsigned int val,
319 int *dir)
320{
321 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
322 if (changed < 0)
323 return changed;
324 if (params->rmask) {
325 int err = snd_pcm_hw_refine(pcm, params);
326 if (err < 0)
327 return err;
328 }
329 return snd_pcm_hw_param_value_max(params, var, dir);
330}
331
332static int boundary_sub(int a, int adir,
333 int b, int bdir,
334 int *c, int *cdir)
335{
336 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
337 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
338 *c = a - b;
339 *cdir = adir - bdir;
340 if (*cdir == -2) {
341 (*c)--;
342 } else if (*cdir == 2) {
343 (*c)++;
344 }
345 return 0;
346}
347
348static int boundary_lt(unsigned int a, int adir,
349 unsigned int b, int bdir)
350{
351 if (adir < 0) {
352 a--;
353 adir = 1;
354 } else if (adir > 0)
355 adir = 1;
356 if (bdir < 0) {
357 b--;
358 bdir = 1;
359 } else if (bdir > 0)
360 bdir = 1;
361 return a < b || (a == b && adir < bdir);
362}
363
364/* Return 1 if min is nearer to best than max */
365static int boundary_nearer(int min, int mindir,
366 int best, int bestdir,
367 int max, int maxdir)
368{
369 int dmin, dmindir;
370 int dmax, dmaxdir;
371 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
372 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
373 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
374}
375
376/**
377 * snd_pcm_hw_param_near
378 * @pcm: PCM instance
379 * @params: the hw_params instance
380 * @var: parameter to retrieve
381 * @best: value to set
382 * @dir: pointer to the direction (-1,0,1) or NULL
383 *
384 * Inside configuration space defined by PARAMS set PAR to the available value
385 * nearest to VAL. Reduce configuration space accordingly.
386 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
387 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
388 * Return the value found.
389 */
390static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
391 struct snd_pcm_hw_params *params,
392 snd_pcm_hw_param_t var, unsigned int best,
393 int *dir)
394{
395 struct snd_pcm_hw_params *save = NULL;
396 int v;
397 unsigned int saved_min;
398 int last = 0;
399 int min, max;
400 int mindir, maxdir;
401 int valdir = dir ? *dir : 0;
402 /* FIXME */
403 if (best > INT_MAX)
404 best = INT_MAX;
405 min = max = best;
406 mindir = maxdir = valdir;
407 if (maxdir > 0)
408 maxdir = 0;
409 else if (maxdir == 0)
410 maxdir = -1;
411 else {
412 maxdir = 1;
413 max--;
414 }
415 save = kmalloc(sizeof(*save), GFP_KERNEL);
416 if (save == NULL)
417 return -ENOMEM;
418 *save = *params;
419 saved_min = min;
420 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
421 if (min >= 0) {
422 struct snd_pcm_hw_params *params1;
423 if (max < 0)
424 goto _end;
425 if ((unsigned int)min == saved_min && mindir == valdir)
426 goto _end;
427 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
428 if (params1 == NULL) {
429 kfree(save);
430 return -ENOMEM;
431 }
432 *params1 = *save;
433 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
434 if (max < 0) {
435 kfree(params1);
436 goto _end;
437 }
438 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
439 *params = *params1;
440 last = 1;
441 }
442 kfree(params1);
443 } else {
444 *params = *save;
445 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
3daa7ea6
JJ		 446 if (max < 0) {
447 kfree(save);
7eaa943c 448 return max;
3daa7ea6 449 }
e88e8ae6
TI		 450 last = 1;
451 }
452 _end:
453 kfree(save);
454 if (last)
455 v = snd_pcm_hw_param_last(pcm, params, var, dir);
456 else
457 v = snd_pcm_hw_param_first(pcm, params, var, dir);
e88e8ae6
TI		 458 return v;
459}
460
461static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
462 snd_pcm_hw_param_t var, unsigned int val,
463 int dir)
464{
465 int changed;
466 if (hw_is_mask(var)) {
467 struct snd_mask *m = hw_param_mask(params, var);
468 if (val == 0 && dir < 0) {
469 changed = -EINVAL;
470 snd_mask_none(m);
471 } else {
472 if (dir > 0)
473 val++;
474 else if (dir < 0)
475 val--;
476 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
477 }
478 } else if (hw_is_interval(var)) {
479 struct snd_interval *i = hw_param_interval(params, var);
480 if (val == 0 && dir < 0) {
481 changed = -EINVAL;
482 snd_interval_none(i);
483 } else if (dir == 0)
484 changed = snd_interval_refine_set(i, val);
485 else {
486 struct snd_interval t;
487 t.openmin = 1;
488 t.openmax = 1;
489 t.empty = 0;
490 t.integer = 0;
491 if (dir < 0) {
492 t.min = val - 1;
493 t.max = val;
494 } else {
495 t.min = val;
496 t.max = val+1;
497 }
498 changed = snd_interval_refine(i, &t);
499 }
500 } else
501 return -EINVAL;
502 if (changed) {
503 params->cmask |= 1 << var;
504 params->rmask |= 1 << var;
505 }
506 return changed;
507}
508
509/**
510 * snd_pcm_hw_param_set
511 * @pcm: PCM instance
512 * @params: the hw_params instance
513 * @var: parameter to retrieve
514 * @val: value to set
515 * @dir: pointer to the direction (-1,0,1) or NULL
516 *
517 * Inside configuration space defined by PARAMS remove from PAR all
518 * values != VAL. Reduce configuration space accordingly.
519 * Return VAL or -EINVAL if the configuration space is empty
520 */
521static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
522 struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var, unsigned int val,
524 int dir)
525{
526 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
527 if (changed < 0)
528 return changed;
529 if (params->rmask) {
530 int err = snd_pcm_hw_refine(pcm, params);
531 if (err < 0)
532 return err;
533 }
534 return snd_pcm_hw_param_value(params, var, NULL);
535}
536
537static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
538 snd_pcm_hw_param_t var)
539{
540 int changed;
541 changed = snd_interval_setinteger(hw_param_interval(params, var));
542 if (changed) {
543 params->cmask |= 1 << var;
544 params->rmask |= 1 << var;
545 }
546 return changed;
547}
548
549/*
550 * plugin
551 */
552
21a3479a 553#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 554static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 555{
6ac77bc1
TI		 556 struct snd_pcm_runtime *runtime = substream->runtime;
557 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 558
559 plugin = runtime->oss.plugin_first;
560 while (plugin) {
561 next = plugin->next;
562 snd_pcm_plugin_free(plugin);
563 plugin = next;
564 }
565 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
566 return 0;
567}
568
6ac77bc1 569static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 570{
6ac77bc1 571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 572 plugin->next = runtime->oss.plugin_first;
573 plugin->prev = NULL;
574 if (runtime->oss.plugin_first) {
575 runtime->oss.plugin_first->prev = plugin;
576 runtime->oss.plugin_first = plugin;
577 } else {
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
580 }
581 return 0;
582}
583
6ac77bc1 584int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 585{
6ac77bc1 586 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 587 plugin->next = NULL;
588 plugin->prev = runtime->oss.plugin_last;
589 if (runtime->oss.plugin_last) {
590 runtime->oss.plugin_last->next = plugin;
591 runtime->oss.plugin_last = plugin;
592 } else {
593 runtime->oss.plugin_last =
594 runtime->oss.plugin_first = plugin;
595 }
596 return 0;
597}
21a3479a 598#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 599
6ac77bc1 600static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 601{
6ac77bc1 602 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 603 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 604 long bytes = frames_to_bytes(runtime, frames);
1da177e4 605 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 606 return bytes;
cdc5c53f
TI		 607#if BITS_PER_LONG >= 64
608 return runtime->oss.buffer_bytes * bytes / buffer_size;
609#else
610 {
611 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
3f7440a6 612 return div_u64(bsize, buffer_size);
cdc5c53f
TI		 613 }
614#endif
1da177e4
LT		 615}
616
6ac77bc1 617static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 618{
6ac77bc1 619 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 620 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 621 if (buffer_size == runtime->oss.buffer_bytes)
622 return bytes_to_frames(runtime, bytes);
623 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
624}
625
f240406b
JK		 626static inline
627snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
628{
e7636925 629 return runtime->hw_ptr_interrupt;
f240406b
JK		 630}
631
24038a25
TI		 632/* define extended formats in the recent OSS versions (if any) */
633/* linear formats */
634#define AFMT_S32_LE 0x00001000
635#define AFMT_S32_BE 0x00002000
636#define AFMT_S24_LE 0x00008000
637#define AFMT_S24_BE 0x00010000
638#define AFMT_S24_PACKED 0x00040000
639
640/* other supported formats */
641#define AFMT_FLOAT 0x00004000
642#define AFMT_SPDIF_RAW 0x00020000
643
644/* unsupported formats */
645#define AFMT_AC3 0x00000400
646#define AFMT_VORBIS 0x00000800
647
fea952e5 648static snd_pcm_format_t snd_pcm_oss_format_from(int format)
1da177e4
LT		 649{
650 switch (format) {
651 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
652 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
653 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
654 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
655 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
656 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
657 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
658 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
659 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
660 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
24038a25
TI		 661 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
662 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
663 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
664 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
665 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
666 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
667 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
1da177e4
LT		 668 default: return SNDRV_PCM_FORMAT_U8;
669 }
670}
671
fea952e5 672static int snd_pcm_oss_format_to(snd_pcm_format_t format)
1da177e4
LT		 673{
674 switch (format) {
675 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
676 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
677 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
678 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
679 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
680 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
681 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
682 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
683 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
684 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
24038a25
TI		 685 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
686 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
687 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
688 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
689 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
690 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
691 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
1da177e4
LT		 692 default: return -EINVAL;
693 }
694}
695
6ac77bc1
TI		 696static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
697 struct snd_pcm_hw_params *oss_params,
698 struct snd_pcm_hw_params *slave_params)
1da177e4
LT		 699{
700 size_t s;
701 size_t oss_buffer_size, oss_period_size, oss_periods;
702 size_t min_period_size, max_period_size;
6ac77bc1 703 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 704 size_t oss_frame_size;
705
706 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
707 params_channels(oss_params) / 8;
708
709 oss_buffer_size = snd_pcm_plug_client_size(substream,
710 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
f6dbe1be 711 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
9c323fcb 712 if (atomic_read(&substream->mmap_count)) {
1da177e4
LT		 713 if (oss_buffer_size > runtime->oss.mmap_bytes)
714 oss_buffer_size = runtime->oss.mmap_bytes;
715 }
716
060d77b9
TI		 717 if (substream->oss.setup.period_size > 16)
718 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 719 else if (runtime->oss.fragshift) {
720 oss_period_size = 1 << runtime->oss.fragshift;
721 if (oss_period_size > oss_buffer_size / 2)
722 oss_period_size = oss_buffer_size / 2;
723 } else {
724 int sd;
725 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
726
727 oss_period_size = oss_buffer_size;
728 do {
729 oss_period_size /= 2;
730 } while (oss_period_size > bytes_per_sec);
731 if (runtime->oss.subdivision == 0) {
732 sd = 4;
733 if (oss_period_size / sd > 4096)
734 sd *= 2;
735 if (oss_period_size / sd < 4096)
736 sd = 1;
737 } else
738 sd = runtime->oss.subdivision;
739 oss_period_size /= sd;
740 if (oss_period_size < 16)
741 oss_period_size = 16;
742 }
743
744 min_period_size = snd_pcm_plug_client_size(substream,
745 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
746 min_period_size *= oss_frame_size;
f6dbe1be 747 min_period_size = roundup_pow_of_two(min_period_size);
1da177e4
LT		 748 if (oss_period_size < min_period_size)
749 oss_period_size = min_period_size;
750
751 max_period_size = snd_pcm_plug_client_size(substream,
752 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
753 max_period_size *= oss_frame_size;
f6dbe1be 754 max_period_size = rounddown_pow_of_two(max_period_size);
1da177e4
LT		 755 if (oss_period_size > max_period_size)
756 oss_period_size = max_period_size;
757
758 oss_periods = oss_buffer_size / oss_period_size;
759
060d77b9
TI		 760 if (substream->oss.setup.periods > 1)
761 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 762
763 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
764 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
765 s = runtime->oss.maxfrags;
766 if (oss_periods > s)
767 oss_periods = s;
768
769 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
770 if (s < 2)
771 s = 2;
772 if (oss_periods < s)
773 oss_periods = s;
774
775 while (oss_period_size * oss_periods > oss_buffer_size)
776 oss_period_size /= 2;
777
7eaa943c
TI		 778 if (oss_period_size < 16)
779 return -EINVAL;
1da177e4
LT		 780 runtime->oss.period_bytes = oss_period_size;
781 runtime->oss.period_frames = 1;
782 runtime->oss.periods = oss_periods;
783 return 0;
784}
785
6ac77bc1
TI		 786static int choose_rate(struct snd_pcm_substream *substream,
787 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 788{
b55f9fdc 789 const struct snd_interval *it;
6ac77bc1 790 struct snd_pcm_hw_params *save;
1da177e4
LT		 791 unsigned int rate, prev;
792
793 save = kmalloc(sizeof(*save), GFP_KERNEL);
794 if (save == NULL)
795 return -ENOMEM;
796 *save = *params;
b55f9fdc 797 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 798
799 /* try multiples of the best rate */
800 rate = best_rate;
801 for (;;) {
802 if (it->max < rate || (it->max == rate && it->openmax))
803 break;
804 if (it->min < rate || (it->min == rate && !it->openmin)) {
805 int ret;
806 ret = snd_pcm_hw_param_set(substream, params,
807 SNDRV_PCM_HW_PARAM_RATE,
808 rate, 0);
809 if (ret == (int)rate) {
810 kfree(save);
811 return rate;
812 }
813 *params = *save;
814 }
815 prev = rate;
816 rate += best_rate;
817 if (rate <= prev)
818 break;
819 }
820
821 /* not found, use the nearest rate */
822 kfree(save);
823 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
824}
825
b2483716
TI		 826static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
827 bool trylock)
1da177e4 828{
6ac77bc1
TI		 829 struct snd_pcm_runtime *runtime = substream->runtime;
830 struct snd_pcm_hw_params *params, *sparams;
831 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 832 ssize_t oss_buffer_size, oss_period_size;
833 size_t oss_frame_size;
834 int err;
835 int direct;
fea952e5
CL		 836 snd_pcm_format_t format, sformat;
837 int n;
e76bf3c4 838 const struct snd_mask *sformat_mask;
6ac77bc1 839 struct snd_mask mask;
1da177e4 840
b2483716
TI		 841 if (trylock) {
842 if (!(mutex_trylock(&runtime->oss.params_lock)))
843 return -EAGAIN;
844 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
85f5097f 845 return -ERESTARTSYS;
46325371 846 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
1da177e4
LT		 847 params = kmalloc(sizeof(*params), GFP_KERNEL);
848 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
849 if (!sw_params || !params || !sparams) {
1da177e4
LT		 850 err = -ENOMEM;
851 goto failure;
852 }
853
9c323fcb 854 if (atomic_read(&substream->mmap_count))
1da177e4 855 direct = 1;
060d77b9
TI		 856 else
857 direct = substream->oss.setup.direct;
1da177e4
LT		 858
859 _snd_pcm_hw_params_any(sparams);
860 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
861 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
862 snd_mask_none(&mask);
9c323fcb 863 if (atomic_read(&substream->mmap_count))
fea952e5 864 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 865 else {
fea952e5 866 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 867 if (!direct)
fea952e5 868 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
1da177e4
LT		 869 }
870 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
871 if (err < 0) {
61efcee8 872 pcm_dbg(substream->pcm, "No usable accesses\n");
1da177e4
LT		 873 err = -EINVAL;
874 goto failure;
875 }
876 choose_rate(substream, sparams, runtime->oss.rate);
877 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
878
879 format = snd_pcm_oss_format_from(runtime->oss.format);
880
e76bf3c4 881 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 882 if (direct)
883 sformat = format;
884 else
e76bf3c4 885 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
1da177e4 886
fea952e5 887 if ((__force int)sformat < 0 ||
e76bf3c4 888 !snd_mask_test(sformat_mask, (__force int)sformat)) {
fea952e5
CL		 889 for (sformat = (__force snd_pcm_format_t)0;
890 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
891 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
e76bf3c4 892 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
1da177e4
LT		 893 snd_pcm_oss_format_to(sformat) >= 0)
894 break;
895 }
fea952e5 896 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
61efcee8 897 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
1da177e4
LT		 898 err = -EINVAL;
899 goto failure;
900 }
901 }
fea952e5 902 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
7eaa943c
TI		 903 if (err < 0)
904 goto failure;
1da177e4
LT		 905
906 if (direct) {
907 memcpy(params, sparams, sizeof(*params));
908 } else {
909 _snd_pcm_hw_params_any(params);
910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
fea952e5 911 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
1da177e4 912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
fea952e5 913 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
1da177e4
LT		 914 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
915 runtime->oss.channels, 0);
916 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
917 runtime->oss.rate, 0);
918 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
919 params_access(params), params_format(params),
920 params_channels(params), params_rate(params));
921 }
922 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
923 params_access(sparams), params_format(sparams),
924 params_channels(sparams), params_rate(sparams));
925
926 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
927 params_channels(params) / 8;
928
21a3479a 929#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 930 snd_pcm_oss_plugin_clear(substream);
931 if (!direct) {
932 /* add necessary plugins */
933 snd_pcm_oss_plugin_clear(substream);
934 if ((err = snd_pcm_plug_format_plugins(substream,
935 params,
936 sparams)) < 0) {
61efcee8
TI		 937 pcm_dbg(substream->pcm,
938 "snd_pcm_plug_format_plugins failed: %i\n", err);
1da177e4
LT		 939 snd_pcm_oss_plugin_clear(substream);
940 goto failure;
941 }
942 if (runtime->oss.plugin_first) {
6ac77bc1 943 struct snd_pcm_plugin *plugin;
1da177e4 944 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
61efcee8
TI		 945 pcm_dbg(substream->pcm,
946 "snd_pcm_plugin_build_io failed: %i\n", err);
1da177e4
LT		 947 snd_pcm_oss_plugin_clear(substream);
948 goto failure;
949 }
950 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
951 err = snd_pcm_plugin_append(plugin);
952 } else {
953 err = snd_pcm_plugin_insert(plugin);
954 }
955 if (err < 0) {
956 snd_pcm_oss_plugin_clear(substream);
957 goto failure;
958 }
959 }
960 }
21a3479a 961#endif
1da177e4
LT		 962
963 err = snd_pcm_oss_period_size(substream, params, sparams);
964 if (err < 0)
965 goto failure;
966
967 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
968 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
7eaa943c
TI		 969 if (err < 0)
970 goto failure;
1da177e4
LT		 971
972 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
973 runtime->oss.periods, NULL);
7eaa943c
TI		 974 if (err < 0)
975 goto failure;
1da177e4
LT		 976
977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
978
979 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
61efcee8 980 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
1da177e4
LT		 981 goto failure;
982 }
983
1da177e4
LT		 984 if (runtime->oss.trigger) {
985 sw_params->start_threshold = 1;
986 } else {
987 sw_params->start_threshold = runtime->boundary;
988 }
9c323fcb
TI		 989 if (atomic_read(&substream->mmap_count) ||
990 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 991 sw_params->stop_threshold = runtime->boundary;
992 else
993 sw_params->stop_threshold = runtime->buffer_size;
994 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
995 sw_params->period_step = 1;
004e6538
TI		 996 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
997 1 : runtime->period_size;
9c323fcb 998 if (atomic_read(&substream->mmap_count) ||
060d77b9 999 substream->oss.setup.nosilence) {
1da177e4
LT		 1000 sw_params->silence_threshold = 0;
1001 sw_params->silence_size = 0;
1002 } else {
1003 snd_pcm_uframes_t frames;
1004 frames = runtime->period_size + 16;
1005 if (frames > runtime->buffer_size)
1006 frames = runtime->buffer_size;
1007 sw_params->silence_threshold = frames;
1008 sw_params->silence_size = frames;
1009 }
1010
1011 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
61efcee8 1012 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1da177e4
LT		 1013 goto failure;
1014 }
1015
1016 runtime->oss.periods = params_periods(sparams);
1017 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
7eaa943c
TI		 1018 if (oss_period_size < 0) {
1019 err = -EINVAL;
1020 goto failure;
1021 }
21a3479a 1022#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1023 if (runtime->oss.plugin_first) {
1024 err = snd_pcm_plug_alloc(substream, oss_period_size);
1025 if (err < 0)
1026 goto failure;
1027 }
21a3479a 1028#endif
1da177e4
LT		 1029 oss_period_size *= oss_frame_size;
1030
1031 oss_buffer_size = oss_period_size * runtime->oss.periods;
7eaa943c
TI		 1032 if (oss_buffer_size < 0) {
1033 err = -EINVAL;
1034 goto failure;
1035 }
1da177e4
LT		 1036
1037 runtime->oss.period_bytes = oss_period_size;
1038 runtime->oss.buffer_bytes = oss_buffer_size;
1039
1040 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1041 runtime->oss.period_bytes,
1042 runtime->oss.buffer_bytes);
1043 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1044 params_period_size(sparams),
1045 params_buffer_size(sparams));
1046
1047 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1048 runtime->oss.channels = params_channels(params);
1049 runtime->oss.rate = params_rate(params);
1050
1da177e4
LT		 1051 vfree(runtime->oss.buffer);
1052 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
cbbb0570
RK		 1053 if (!runtime->oss.buffer) {
1054 err = -ENOMEM;
1055 goto failure;
1056 }
1057
1058 runtime->oss.params = 0;
1059 runtime->oss.prepare = 1;
1da177e4
LT		 1060 runtime->oss.buffer_used = 0;
1061 if (runtime->dma_area)
1062 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1063
1064 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1065
1066 err = 0;
1067failure:
1068 kfree(sw_params);
1069 kfree(params);
1070 kfree(sparams);
e3a5d59a 1071 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1072 return err;
1073}
1074
6ac77bc1 1075static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1076{
1077 int idx, err;
6ac77bc1 1078 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 1079
1080 for (idx = 0; idx < 2; idx++) {
1081 substream = pcm_oss_file->streams[idx];
1082 if (substream == NULL)
1083 continue;
1084 if (asubstream == NULL)
1085 asubstream = substream;
1086 if (substream->runtime->oss.params) {
b2483716 1087 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1088 if (err < 0)
1089 return err;
1090 }
1091 }
7eaa943c
TI		 1092 if (!asubstream)
1093 return -EIO;
1da177e4
LT		 1094 if (r_substream)
1095 *r_substream = asubstream;
1096 return 0;
1097}
1098
6ac77bc1 1099static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1100{
1101 int err;
6ac77bc1 1102 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1103
1104 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1105 if (err < 0) {
61efcee8
TI		 1106 pcm_dbg(substream->pcm,
1107 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1da177e4
LT		 1108 return err;
1109 }
1110 runtime->oss.prepare = 0;
f240406b 1111 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1112 runtime->oss.period_ptr = 0;
1113 runtime->oss.buffer_used = 0;
1114
1115 return 0;
1116}
1117
6ac77bc1 1118static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1119{
6ac77bc1 1120 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1121 int err;
1122
1123 if (substream == NULL)
1124 return 0;
1125 runtime = substream->runtime;
1126 if (runtime->oss.params) {
b2483716 1127 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1128 if (err < 0)
1129 return err;
1130 }
1131 if (runtime->oss.prepare) {
1132 err = snd_pcm_oss_prepare(substream);
1133 if (err < 0)
1134 return err;
1135 }
1136 return 0;
1137}
1138
6ac77bc1 1139static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1140{
6ac77bc1 1141 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1142 snd_pcm_uframes_t frames;
1143 int err = 0;
1144
1145 while (1) {
1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1147 if (err < 0)
1148 break;
1149 runtime = substream->runtime;
1150 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1151 break;
1152 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1153 /* until avail(delay) <= buffer_size */
1154 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1155 frames /= runtime->period_size;
1156 frames *= runtime->period_size;
1157 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1158 if (err < 0)
1159 break;
1160 }
1161 return err;
1162}
1163
6ac77bc1 1164snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1165{
6ac77bc1 1166 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1167 int ret;
1168 while (1) {
1169 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1170 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1171#ifdef OSS_DEBUG
61efcee8
TI		 1172 pcm_dbg(substream->pcm,
1173 "pcm_oss: write: recovering from %s\n",
1174 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1175 "XRUN" : "SUSPEND");
1da177e4
LT		 1176#endif
1177 ret = snd_pcm_oss_prepare(substream);
1178 if (ret < 0)
1179 break;
1180 }
13f72c8c
TI		 1181 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1182 frames, in_kernel);
1da177e4
LT		 1183 if (ret != -EPIPE && ret != -ESTRPIPE)
1184 break;
1185 /* test, if we can't store new data, because the stream */
1186 /* has not been started */
1187 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1188 return -EAGAIN;
1189 }
1190 return ret;
1191}
1192
6ac77bc1 1193snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1194{
6ac77bc1 1195 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1196 snd_pcm_sframes_t delay;
1197 int ret;
1198 while (1) {
1199 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1200 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1201#ifdef OSS_DEBUG
61efcee8
TI		 1202 pcm_dbg(substream->pcm,
1203 "pcm_oss: read: recovering from %s\n",
1204 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1205 "XRUN" : "SUSPEND");
1da177e4
LT		 1206#endif
1207 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1208 if (ret < 0)
1209 break;
1210 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1211 ret = snd_pcm_oss_prepare(substream);
1212 if (ret < 0)
1213 break;
1214 }
1215 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1216 if (ret < 0)
1217 break;
13f72c8c
TI		 1218 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1219 frames, in_kernel);
1da177e4
LT		 1220 if (ret == -EPIPE) {
1221 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1222 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1223 if (ret < 0)
1224 break;
1225 }
1226 continue;
1227 }
1228 if (ret != -ESTRPIPE)
1229 break;
1230 }
1231 return ret;
1232}
1233
fed5794f
TI		 1234#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1235snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1da177e4 1236{
6ac77bc1 1237 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1238 int ret;
1239 while (1) {
1240 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1241 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1242#ifdef OSS_DEBUG
61efcee8
TI		 1243 pcm_dbg(substream->pcm,
1244 "pcm_oss: writev: recovering from %s\n",
1245 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1246 "XRUN" : "SUSPEND");
1da177e4
LT		 1247#endif
1248 ret = snd_pcm_oss_prepare(substream);
1249 if (ret < 0)
1250 break;
1251 }
fed5794f 1252 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1da177e4
LT		 1253 if (ret != -EPIPE && ret != -ESTRPIPE)
1254 break;
1255
1256 /* test, if we can't store new data, because the stream */
1257 /* has not been started */
1258 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1259 return -EAGAIN;
1260 }
1261 return ret;
1262}
1263
fed5794f 1264snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1da177e4 1265{
6ac77bc1 1266 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1267 int ret;
1268 while (1) {
1269 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1270 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1271#ifdef OSS_DEBUG
61efcee8
TI		 1272 pcm_dbg(substream->pcm,
1273 "pcm_oss: readv: recovering from %s\n",
1274 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1275 "XRUN" : "SUSPEND");
1da177e4
LT		 1276#endif
1277 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1278 if (ret < 0)
1279 break;
1280 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1281 ret = snd_pcm_oss_prepare(substream);
1282 if (ret < 0)
1283 break;
1284 }
fed5794f 1285 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1da177e4
LT		 1286 if (ret != -EPIPE && ret != -ESTRPIPE)
1287 break;
1288 }
1289 return ret;
1290}
fed5794f 1291#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 1292
6ac77bc1 1293static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1294{
6ac77bc1 1295 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1296 snd_pcm_sframes_t frames, frames1;
21a3479a 1297#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1298 if (runtime->oss.plugin_first) {
6ac77bc1 1299 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1300 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1301 if (!in_kernel) {
fea952e5 1302 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1da177e4
LT		 1303 return -EFAULT;
1304 buf = runtime->oss.buffer;
1305 }
1306 frames = bytes / oss_frame_bytes;
1307 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1308 if (frames1 < 0)
1309 return frames1;
1310 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1311 if (frames1 <= 0)
1312 return frames1;
1313 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 1314 } else
1315#endif
1316 {
1da177e4
LT		 1317 frames = bytes_to_frames(runtime, bytes);
1318 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1319 if (frames1 <= 0)
1320 return frames1;
1321 bytes = frames_to_bytes(runtime, frames1);
1322 }
1323 return bytes;
1324}
1325
6ac77bc1 1326static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1327{
1328 size_t xfer = 0;
be81a5ae 1329 ssize_t tmp = 0;
6ac77bc1 1330 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1331
9c323fcb 1332 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1333 return -ENXIO;
1334
1335 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1336 return tmp;
1337 while (bytes > 0) {
900498a3
TI		 1338 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1339 tmp = -ERESTARTSYS;
1340 break;
1341 }
1da177e4
LT		 1342 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1343 tmp = bytes;
1344 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1345 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1346 if (tmp > 0) {
e3a5d59a
TI		 1347 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1348 tmp = -EFAULT;
1349 goto err;
1350 }
1da177e4
LT		 1351 }
1352 runtime->oss.buffer_used += tmp;
1353 buf += tmp;
1354 bytes -= tmp;
1355 xfer += tmp;
060d77b9 1356 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 1357 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1358 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1359 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1360 if (tmp <= 0)
e3a5d59a 1361 goto err;
1da177e4
LT		 1362 runtime->oss.bytes += tmp;
1363 runtime->oss.period_ptr += tmp;
1364 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1365 if (runtime->oss.period_ptr == 0 ||
1366 runtime->oss.period_ptr == runtime->oss.buffer_used)
1367 runtime->oss.buffer_used = 0;
e3a5d59a
TI		 1368 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1369 tmp = -EAGAIN;
1370 goto err;
1371 }
1da177e4
LT		 1372 }
1373 } else {
4d23359b
CL		 1374 tmp = snd_pcm_oss_write2(substream,
1375 (const char __force *)buf,
1376 runtime->oss.period_bytes, 0);
1da177e4 1377 if (tmp <= 0)
e3a5d59a 1378 goto err;
1da177e4
LT		 1379 runtime->oss.bytes += tmp;
1380 buf += tmp;
1381 bytes -= tmp;
1382 xfer += tmp;
0df63e44 1383 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4 1384 tmp != runtime->oss.period_bytes)
900498a3 1385 tmp = -EAGAIN;
1da177e4 1386 }
900498a3
TI		 1387 err:
1388 mutex_unlock(&runtime->oss.params_lock);
1389 if (tmp < 0)
1390 break;
29159a4e
TI		 1391 if (signal_pending(current)) {
1392 tmp = -ERESTARTSYS;
900498a3 1393 break;
29159a4e 1394 }
900498a3 1395 tmp = 0;
1da177e4 1396 }
e3a5d59a 1397 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1398}
1399
6ac77bc1 1400static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1401{
6ac77bc1 1402 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1403 snd_pcm_sframes_t frames, frames1;
21a3479a 1404#ifdef CONFIG_SND_PCM_OSS_PLUGINS
fea952e5 1405 char __user *final_dst = (char __force __user *)buf;
1da177e4 1406 if (runtime->oss.plugin_first) {
6ac77bc1 1407 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1408 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1409 if (!in_kernel)
1410 buf = runtime->oss.buffer;
1411 frames = bytes / oss_frame_bytes;
1412 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1413 if (frames1 < 0)
1414 return frames1;
1415 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1416 if (frames1 <= 0)
1417 return frames1;
1418 bytes = frames1 * oss_frame_bytes;
1419 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1420 return -EFAULT;
21a3479a
JK		 1421 } else
1422#endif
1423 {
1da177e4
LT		 1424 frames = bytes_to_frames(runtime, bytes);
1425 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1426 if (frames1 <= 0)
1427 return frames1;
1428 bytes = frames_to_bytes(runtime, frames1);
1429 }
1430 return bytes;
1431}
1432
6ac77bc1 1433static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1434{
1435 size_t xfer = 0;
be81a5ae 1436 ssize_t tmp = 0;
6ac77bc1 1437 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1438
9c323fcb 1439 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1440 return -ENXIO;
1441
1442 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1443 return tmp;
1444 while (bytes > 0) {
900498a3
TI		 1445 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1446 tmp = -ERESTARTSYS;
1447 break;
1448 }
1da177e4
LT		 1449 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1450 if (runtime->oss.buffer_used == 0) {
1451 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1452 if (tmp <= 0)
e3a5d59a 1453 goto err;
1da177e4
LT		 1454 runtime->oss.bytes += tmp;
1455 runtime->oss.period_ptr = tmp;
1456 runtime->oss.buffer_used = tmp;
1457 }
1458 tmp = bytes;
1459 if ((size_t) tmp > runtime->oss.buffer_used)
1460 tmp = runtime->oss.buffer_used;
e3a5d59a
TI		 1461 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1462 tmp = -EFAULT;
1463 goto err;
1464 }
1da177e4
LT		 1465 buf += tmp;
1466 bytes -= tmp;
1467 xfer += tmp;
1468 runtime->oss.buffer_used -= tmp;
1469 } else {
4d23359b
CL		 1470 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1471 runtime->oss.period_bytes, 0);
1da177e4 1472 if (tmp <= 0)
e3a5d59a 1473 goto err;
1da177e4
LT		 1474 runtime->oss.bytes += tmp;
1475 buf += tmp;
1476 bytes -= tmp;
1477 xfer += tmp;
1478 }
900498a3
TI		 1479 err:
1480 mutex_unlock(&runtime->oss.params_lock);
1481 if (tmp < 0)
1482 break;
29159a4e
TI		 1483 if (signal_pending(current)) {
1484 tmp = -ERESTARTSYS;
900498a3 1485 break;
29159a4e 1486 }
900498a3 1487 tmp = 0;
1da177e4 1488 }
e3a5d59a 1489 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1490}
1491
6ac77bc1 1492static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1493{
6ac77bc1 1494 struct snd_pcm_substream *substream;
60686aa0
TI		 1495 struct snd_pcm_runtime *runtime;
1496 int i;
1da177e4 1497
60686aa0
TI		 1498 for (i = 0; i < 2; i++) {
1499 substream = pcm_oss_file->streams[i];
1500 if (!substream)
1501 continue;
1502 runtime = substream->runtime;
bf1bbb5a 1503 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
60686aa0
TI		 1504 runtime->oss.prepare = 1;
1505 runtime->oss.buffer_used = 0;
1506 runtime->oss.prev_hw_ptr_period = 0;
1507 runtime->oss.period_ptr = 0;
1da177e4
LT		 1508 }
1509 return 0;
1510}
1511
6ac77bc1 1512static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1513{
6ac77bc1 1514 struct snd_pcm_substream *substream;
1da177e4
LT		 1515 int err;
1516
1517 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1518 if (substream != NULL) {
1519 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1520 return err;
bf1bbb5a 1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 1522 }
1523 /* note: all errors from the start action are ignored */
1524 /* OSS apps do not know, how to handle them */
1525 return 0;
1526}
1527
6ac77bc1 1528static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1529{
6ac77bc1 1530 struct snd_pcm_runtime *runtime;
1da177e4 1531 ssize_t result = 0;
fea952e5 1532 snd_pcm_state_t state;
1da177e4 1533 long res;
ac6424b9 1534 wait_queue_entry_t wait;
1da177e4
LT		 1535
1536 runtime = substream->runtime;
1537 init_waitqueue_entry(&wait, current);
1538 add_wait_queue(&runtime->sleep, &wait);
1539#ifdef OSS_DEBUG
61efcee8 1540 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1da177e4
LT		 1541#endif
1542 while (1) {
1543 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1544 if (result > 0) {
1545 runtime->oss.buffer_used = 0;
1546 result = 0;
1547 break;
1548 }
1549 if (result != 0 && result != -EAGAIN)
1550 break;
1551 result = 0;
1552 set_current_state(TASK_INTERRUPTIBLE);
1553 snd_pcm_stream_lock_irq(substream);
fea952e5 1554 state = runtime->status->state;
1da177e4 1555 snd_pcm_stream_unlock_irq(substream);
fea952e5 1556 if (state != SNDRV_PCM_STATE_RUNNING) {
1da177e4
LT		 1557 set_current_state(TASK_RUNNING);
1558 break;
1559 }
1560 res = schedule_timeout(10 * HZ);
1561 if (signal_pending(current)) {
1562 result = -ERESTARTSYS;
1563 break;
1564 }
1565 if (res == 0) {
61efcee8
TI		 1566 pcm_err(substream->pcm,
1567 "OSS sync error - DMA timeout\n");
1da177e4
LT		 1568 result = -EIO;
1569 break;
1570 }
1571 }
1572 remove_wait_queue(&runtime->sleep, &wait);
1573 return result;
1574}
1575
6ac77bc1 1576static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1577{
1578 int err = 0;
1579 unsigned int saved_f_flags;
6ac77bc1
TI		 1580 struct snd_pcm_substream *substream;
1581 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1582 snd_pcm_format_t format;
1583 unsigned long width;
1584 size_t size;
1585
1586 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1587 if (substream != NULL) {
1588 runtime = substream->runtime;
9c323fcb 1589 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1590 goto __direct;
1591 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1592 return err;
1593 format = snd_pcm_oss_format_from(runtime->oss.format);
1594 width = snd_pcm_format_physical_width(format);
e3a5d59a 1595 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1596 if (runtime->oss.buffer_used > 0) {
1597#ifdef OSS_DEBUG
61efcee8 1598 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1da177e4
LT		 1599#endif
1600 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1601 snd_pcm_format_set_silence(format,
1602 runtime->oss.buffer + runtime->oss.buffer_used,
1603 size);
1604 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
e3a5d59a
TI		 1605 if (err < 0) {
1606 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1607 return err;
e3a5d59a 1608 }
1da177e4
LT		 1609 } else if (runtime->oss.period_ptr > 0) {
1610#ifdef OSS_DEBUG
61efcee8 1611 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1da177e4
LT		 1612#endif
1613 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1614 snd_pcm_format_set_silence(format,
1615 runtime->oss.buffer,
1616 size * 8 / width);
1617 err = snd_pcm_oss_sync1(substream, size);
e3a5d59a
TI		 1618 if (err < 0) {
1619 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1620 return err;
e3a5d59a 1621 }
1da177e4
LT		 1622 }
1623 /*
1624 * The ALSA's period might be a bit large than OSS one.
1625 * Fill the remain portion of ALSA period with zeros.
1626 */
1627 size = runtime->control->appl_ptr % runtime->period_size;
1628 if (size > 0) {
1629 size = runtime->period_size - size;
13f72c8c
TI		 1630 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1631 snd_pcm_lib_write(substream, NULL, size);
1632 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1633 snd_pcm_lib_writev(substream, NULL, size);
1da177e4 1634 }
e3a5d59a 1635 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1636 /*
1637 * finish sync: drain the buffer
1638 */
1639 __direct:
0df63e44
TI		 1640 saved_f_flags = substream->f_flags;
1641 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1642 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1643 substream->f_flags = saved_f_flags;
1da177e4
LT		 1644 if (err < 0)
1645 return err;
1646 runtime->oss.prepare = 1;
1647 }
1648
1649 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1650 if (substream != NULL) {
1651 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1652 return err;
1653 runtime = substream->runtime;
bf1bbb5a 1654 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1655 if (err < 0)
1656 return err;
1657 runtime->oss.buffer_used = 0;
1658 runtime->oss.prepare = 1;
1659 }
1660 return 0;
1661}
1662
6ac77bc1 1663static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1664{
1665 int idx;
1666
1667 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1668 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1669 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1670 if (substream == NULL)
1671 continue;
1672 runtime = substream->runtime;
1673 if (rate < 1000)
1674 rate = 1000;
1675 else if (rate > 192000)
1676 rate = 192000;
1677 if (runtime->oss.rate != rate) {
1678 runtime->oss.params = 1;
1679 runtime->oss.rate = rate;
1680 }
1681 }
1682 return snd_pcm_oss_get_rate(pcm_oss_file);
1683}
1684
6ac77bc1 1685static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1686{
6ac77bc1 1687 struct snd_pcm_substream *substream;
1da177e4
LT		 1688 int err;
1689
1690 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1691 return err;
1692 return substream->runtime->oss.rate;
1693}
1694
6ac77bc1 1695static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1696{
1697 int idx;
1698 if (channels < 1)
1699 channels = 1;
1700 if (channels > 128)
1701 return -EINVAL;
1702 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1705 if (substream == NULL)
1706 continue;
1707 runtime = substream->runtime;
1708 if (runtime->oss.channels != channels) {
1709 runtime->oss.params = 1;
1710 runtime->oss.channels = channels;
1711 }
1712 }
1713 return snd_pcm_oss_get_channels(pcm_oss_file);
1714}
1715
6ac77bc1 1716static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1717{
6ac77bc1 1718 struct snd_pcm_substream *substream;
1da177e4
LT		 1719 int err;
1720
1721 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1722 return err;
1723 return substream->runtime->oss.channels;
1724}
1725
6ac77bc1 1726static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1727{
6ac77bc1 1728 struct snd_pcm_substream *substream;
1da177e4
LT		 1729 int err;
1730
1731 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1732 return err;
1733 return substream->runtime->oss.period_bytes;
1734}
1735
6ac77bc1 1736static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1737{
6ac77bc1 1738 struct snd_pcm_substream *substream;
1da177e4
LT		 1739 int err;
1740 int direct;
6ac77bc1 1741 struct snd_pcm_hw_params *params;
1da177e4 1742 unsigned int formats = 0;
e76bf3c4 1743 const struct snd_mask *format_mask;
1da177e4
LT		 1744 int fmt;
1745
1746 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1747 return err;
9c323fcb 1748 if (atomic_read(&substream->mmap_count))
1da177e4 1749 direct = 1;
060d77b9
TI		 1750 else
1751 direct = substream->oss.setup.direct;
1da177e4
LT		 1752 if (!direct)
1753 return AFMT_MU_LAW | AFMT_U8 |
1754 AFMT_S16_LE | AFMT_S16_BE |
1755 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1756 AFMT_U16_BE |
1757 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1758 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1759 AFMT_S24_PACKED;
1da177e4
LT		 1760 params = kmalloc(sizeof(*params), GFP_KERNEL);
1761 if (!params)
1762 return -ENOMEM;
1763 _snd_pcm_hw_params_any(params);
1764 err = snd_pcm_hw_refine(substream, params);
7eaa943c 1765 if (err < 0)
7219fa1b
TI		 1766 goto error;
1767 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4 1768 for (fmt = 0; fmt < 32; ++fmt) {
e76bf3c4 1769 if (snd_mask_test(format_mask, fmt)) {
1da177e4
LT		 1770 int f = snd_pcm_oss_format_to(fmt);
1771 if (f >= 0)
1772 formats |= f;
1773 }
1774 }
7219fa1b
TI		 1775
1776 error:
1777 kfree(params);
1778 return err < 0 ? err : formats;
1da177e4
LT		 1779}
1780
6ac77bc1 1781static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1782{
1783 int formats, idx;
1784
1785 if (format != AFMT_QUERY) {
1786 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1787 if (formats < 0)
1788 return formats;
1da177e4
LT		 1789 if (!(formats & format))
1790 format = AFMT_U8;
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;
1da177e4
LT		 1794 if (substream == NULL)
1795 continue;
1796 runtime = substream->runtime;
1797 if (runtime->oss.format != format) {
1798 runtime->oss.params = 1;
1799 runtime->oss.format = format;
1800 }
1801 }
1802 }
1803 return snd_pcm_oss_get_format(pcm_oss_file);
1804}
1805
6ac77bc1 1806static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1807{
6ac77bc1 1808 struct snd_pcm_substream *substream;
1da177e4
LT		 1809 int err;
1810
1811 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1812 return err;
1813 return substream->runtime->oss.format;
1814}
1815
6ac77bc1 1816static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1817{
6ac77bc1 1818 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1819
1820 if (substream == NULL)
1821 return 0;
1822 runtime = substream->runtime;
1823 if (subdivide == 0) {
1824 subdivide = runtime->oss.subdivision;
1825 if (subdivide == 0)
1826 subdivide = 1;
1827 return subdivide;
1828 }
1829 if (runtime->oss.subdivision || runtime->oss.fragshift)
1830 return -EINVAL;
1831 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1832 subdivide != 8 && subdivide != 16)
1833 return -EINVAL;
1834 runtime->oss.subdivision = subdivide;
1835 runtime->oss.params = 1;
1836 return subdivide;
1837}
1838
6ac77bc1 1839static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1840{
1841 int err = -EINVAL, idx;
1842
1843 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1844 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1845 if (substream == NULL)
1846 continue;
1847 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1848 return err;
1849 }
1850 return err;
1851}
1852
6ac77bc1 1853static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1854{
6ac77bc1 1855 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1856
1857 if (substream == NULL)
1858 return 0;
1859 runtime = substream->runtime;
1860 if (runtime->oss.subdivision || runtime->oss.fragshift)
1861 return -EINVAL;
1862 runtime->oss.fragshift = val & 0xffff;
1863 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1864 if (runtime->oss.fragshift < 4) /* < 16 */
1865 runtime->oss.fragshift = 4;
1866 if (runtime->oss.maxfrags < 2)
1867 runtime->oss.maxfrags = 2;
1868 runtime->oss.params = 1;
1869 return 0;
1870}
1871
6ac77bc1 1872static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1873{
1874 int err = -EINVAL, idx;
1875
1876 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1877 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1878 if (substream == NULL)
1879 continue;
1880 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1881 return err;
1882 }
1883 return err;
1884}
1885
1886static int snd_pcm_oss_nonblock(struct file * file)
1887{
db1dd4d3 1888 spin_lock(&file->f_lock);
1da177e4 1889 file->f_flags |= O_NONBLOCK;
db1dd4d3 1890 spin_unlock(&file->f_lock);
1da177e4
LT		 1891 return 0;
1892}
1893
6ac77bc1 1894static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1895{
1896
1897 if (substream == NULL) {
1898 res &= ~DSP_CAP_DUPLEX;
1899 return res;
1900 }
1901#ifdef DSP_CAP_MULTI
1902 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1903 if (substream->pstr->substream_count > 1)
1904 res |= DSP_CAP_MULTI;
1905#endif
1906 /* DSP_CAP_REALTIME is set all times: */
1907 /* all ALSA drivers can return actual pointer in ring buffer */
1908#if defined(DSP_CAP_REALTIME) && 0
1909 {
6ac77bc1 1910 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1911 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1912 res &= ~DSP_CAP_REALTIME;
1913 }
1914#endif
1915 return res;
1916}
1917
6ac77bc1 1918static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1919{
1920 int result, idx;
1921
1922 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1923 for (idx = 0; idx < 2; idx++) {
6ac77bc1 1924 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1925 result = snd_pcm_oss_get_caps1(substream, result);
1926 }
1927 result |= 0x0001; /* revision - same as SB AWE 64 */
1928 return result;
1929}
1930
f240406b
JK		 1931static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1932 snd_pcm_uframes_t hw_ptr)
1da177e4 1933{
6ac77bc1 1934 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1935 snd_pcm_uframes_t appl_ptr;
1936 appl_ptr = hw_ptr + runtime->buffer_size;
1937 appl_ptr %= runtime->boundary;
1938 runtime->control->appl_ptr = appl_ptr;
1939}
1940
6ac77bc1 1941static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 1942{
6ac77bc1
TI		 1943 struct snd_pcm_runtime *runtime;
1944 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 1945 int err, cmd;
1946
1947#ifdef OSS_DEBUG
61efcee8 1948 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 1949#endif
1950
1951 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1952 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1953
1954 if (psubstream) {
1955 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1956 return err;
1957 }
1958 if (csubstream) {
1959 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1960 return err;
1961 }
1962 if (psubstream) {
1963 runtime = psubstream->runtime;
1964 if (trigger & PCM_ENABLE_OUTPUT) {
1965 if (runtime->oss.trigger)
1966 goto _skip1;
9c323fcb 1967 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 1968 snd_pcm_oss_simulate_fill(psubstream,
1969 get_hw_ptr_period(runtime));
1da177e4
LT		 1970 runtime->oss.trigger = 1;
1971 runtime->start_threshold = 1;
1972 cmd = SNDRV_PCM_IOCTL_START;
1973 } else {
1974 if (!runtime->oss.trigger)
1975 goto _skip1;
1976 runtime->oss.trigger = 0;
1977 runtime->start_threshold = runtime->boundary;
1978 cmd = SNDRV_PCM_IOCTL_DROP;
1979 runtime->oss.prepare = 1;
1980 }
bf1bbb5a 1981 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1da177e4
LT		 1982 if (err < 0)
1983 return err;
1984 }
1985 _skip1:
1986 if (csubstream) {
1987 runtime = csubstream->runtime;
1988 if (trigger & PCM_ENABLE_INPUT) {
1989 if (runtime->oss.trigger)
1990 goto _skip2;
1991 runtime->oss.trigger = 1;
1992 runtime->start_threshold = 1;
1993 cmd = SNDRV_PCM_IOCTL_START;
1994 } else {
1995 if (!runtime->oss.trigger)
1996 goto _skip2;
1997 runtime->oss.trigger = 0;
1998 runtime->start_threshold = runtime->boundary;
1999 cmd = SNDRV_PCM_IOCTL_DROP;
2000 runtime->oss.prepare = 1;
2001 }
bf1bbb5a 2002 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1da177e4
LT		 2003 if (err < 0)
2004 return err;
2005 }
2006 _skip2:
2007 return 0;
2008}
2009
6ac77bc1 2010static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2011{
6ac77bc1 2012 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2013 int result = 0;
2014
2015 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2016 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2017 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2018 result |= PCM_ENABLE_OUTPUT;
2019 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2020 result |= PCM_ENABLE_INPUT;
2021 return result;
2022}
2023
6ac77bc1 2024static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2025{
6ac77bc1
TI		 2026 struct snd_pcm_substream *substream;
2027 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2028 snd_pcm_sframes_t delay;
2029 int err;
2030
2031 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2032 if (substream == NULL)
2033 return -EINVAL;
2034 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2035 return err;
2036 runtime = substream->runtime;
2037 if (runtime->oss.params || runtime->oss.prepare)
2038 return 0;
bf1bbb5a 2039 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 2040 if (err == -EPIPE)
2041 delay = 0; /* hack for broken OSS applications */
2042 else if (err < 0)
2043 return err;
2044 return snd_pcm_oss_bytes(substream, delay);
2045}
2046
6ac77bc1 2047static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2048{
6ac77bc1
TI		 2049 struct snd_pcm_substream *substream;
2050 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2051 snd_pcm_sframes_t delay;
2052 int fixup;
2053 struct count_info info;
2054 int err;
2055
2056 if (_info == NULL)
2057 return -EFAULT;
2058 substream = pcm_oss_file->streams[stream];
2059 if (substream == NULL)
2060 return -EINVAL;
2061 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2062 return err;
2063 runtime = substream->runtime;
2064 if (runtime->oss.params || runtime->oss.prepare) {
2065 memset(&info, 0, sizeof(info));
2066 if (copy_to_user(_info, &info, sizeof(info)))
2067 return -EFAULT;
2068 return 0;
2069 }
2070 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2071 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2072 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2073 err = 0;
2074 delay = 0;
2075 fixup = 0;
2076 } else {
2077 fixup = runtime->oss.buffer_used;
2078 }
2079 } else {
2080 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2081 fixup = -runtime->oss.buffer_used;
2082 }
2083 if (err < 0)
2084 return err;
2085 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
9c323fcb 2086 if (atomic_read(&substream->mmap_count)) {
1da177e4 2087 snd_pcm_sframes_t n;
f240406b
JK		 2088 delay = get_hw_ptr_period(runtime);
2089 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2090 if (n < 0)
2091 n += runtime->boundary;
2092 info.blocks = n / runtime->period_size;
f240406b 2093 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 2094 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2095 snd_pcm_oss_simulate_fill(substream, delay);
2096 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2097 } else {
5ac0fab9 2098 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2099 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2100 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2101 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2102 else
2103 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2104 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2105 } else {
5ac0fab9
JK		 2106 delay += fixup;
2107 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2108 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2109 }
1da177e4
LT		 2110 }
2111 if (copy_to_user(_info, &info, sizeof(info)))
2112 return -EFAULT;
2113 return 0;
2114}
2115
6ac77bc1 2116static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2117{
6ac77bc1
TI		 2118 struct snd_pcm_substream *substream;
2119 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2120 snd_pcm_sframes_t avail;
2121 int fixup;
2122 struct audio_buf_info info;
2123 int err;
2124
2125 if (_info == NULL)
2126 return -EFAULT;
2127 substream = pcm_oss_file->streams[stream];
2128 if (substream == NULL)
2129 return -EINVAL;
2130 runtime = substream->runtime;
2131
2132 if (runtime->oss.params &&
b2483716 2133 (err = snd_pcm_oss_change_params(substream, false)) < 0)
1da177e4
LT		 2134 return err;
2135
2136 info.fragsize = runtime->oss.period_bytes;
2137 info.fragstotal = runtime->periods;
2138 if (runtime->oss.prepare) {
2139 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2140 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2141 info.fragments = runtime->oss.periods;
2142 } else {
2143 info.bytes = 0;
2144 info.fragments = 0;
2145 }
2146 } else {
2147 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2148 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2149 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2150 avail = runtime->buffer_size;
2151 err = 0;
2152 fixup = 0;
2153 } else {
2154 avail = runtime->buffer_size - avail;
2155 fixup = -runtime->oss.buffer_used;
2156 }
2157 } else {
2158 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2159 fixup = runtime->oss.buffer_used;
2160 }
2161 if (err < 0)
2162 return err;
2163 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2164 info.fragments = info.bytes / runtime->oss.period_bytes;
2165 }
2166
2167#ifdef OSS_DEBUG
61efcee8
TI		 2168 pcm_dbg(substream->pcm,
2169 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2170 info.bytes, info.fragments, info.fragstotal, info.fragsize);
1da177e4
LT		 2171#endif
2172 if (copy_to_user(_info, &info, sizeof(info)))
2173 return -EFAULT;
2174 return 0;
2175}
2176
6ac77bc1 2177static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2178{
2179 // it won't be probably implemented
61efcee8 2180 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
1da177e4
LT		 2181 return -EINVAL;
2182}
2183
060d77b9 2184static const char *strip_task_path(const char *path)
1da177e4 2185{
060d77b9
TI		 2186 const char *ptr, *ptrl = NULL;
2187 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2188 if (*ptr == '/')
2189 ptrl = ptr + 1;
1da177e4 2190 }
060d77b9
TI		 2191 return ptrl;
2192}
2193
2194static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2195 const char *task_name,
2196 struct snd_pcm_oss_setup *rsetup)
2197{
2198 struct snd_pcm_oss_setup *setup;
2199
2200 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2201 do {
2202 for (setup = pcm->streams[stream].oss.setup_list; setup;
2203 setup = setup->next) {
2204 if (!strcmp(setup->task_name, task_name))
2205 goto out;
1da177e4 2206 }
060d77b9
TI		 2207 } while ((task_name = strip_task_path(task_name)) != NULL);
2208 out:
2209 if (setup)
2210 *rsetup = *setup;
1a60d4c5 2211 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 2212}
2213
3bf75f9b
TI		 2214static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2215{
2216 struct snd_pcm_runtime *runtime;
2217 runtime = substream->runtime;
2218 vfree(runtime->oss.buffer);
2219 runtime->oss.buffer = NULL;
2220#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2221 snd_pcm_oss_plugin_clear(substream);
2222#endif
2223 substream->oss.oss = 0;
2224}
2225
6ac77bc1
TI		 2226static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2227 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2228 int minor)
2229{
6ac77bc1 2230 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2231
2232 substream->oss.oss = 1;
060d77b9 2233 substream->oss.setup = *setup;
3bf75f9b 2234 if (setup->nonblock)
0df63e44 2235 substream->f_flags |= O_NONBLOCK;
1576274d 2236 else if (setup->block)
0df63e44 2237 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2238 runtime = substream->runtime;
2239 runtime->oss.params = 1;
2240 runtime->oss.trigger = 1;
2241 runtime->oss.rate = 8000;
e3a5d59a 2242 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 2243 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2244 case SNDRV_MINOR_OSS_PCM_8:
2245 runtime->oss.format = AFMT_U8;
2246 break;
2247 case SNDRV_MINOR_OSS_PCM_16:
2248 runtime->oss.format = AFMT_S16_LE;
2249 break;
2250 default:
2251 runtime->oss.format = AFMT_MU_LAW;
2252 }
2253 runtime->oss.channels = 1;
2254 runtime->oss.fragshift = 0;
2255 runtime->oss.maxfrags = 0;
2256 runtime->oss.subdivision = 0;
3bf75f9b 2257 substream->pcm_release = snd_pcm_oss_release_substream;
1da177e4
LT		 2258}
2259
6ac77bc1 2260static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2261{
2262 int cidx;
7eaa943c
TI		 2263 if (!pcm_oss_file)
2264 return 0;
1da177e4 2265 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2266 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2267 if (substream)
2268 snd_pcm_release_substream(substream);
1da177e4
LT		 2269 }
2270 kfree(pcm_oss_file);
2271 return 0;
2272}
2273
2274static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2275 struct snd_pcm *pcm,
2276 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2277 int minor,
060d77b9 2278 struct snd_pcm_oss_setup *setup)
1da177e4 2279{
3bf75f9b 2280 int idx, err;
6ac77bc1 2281 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2282 struct snd_pcm_substream *substream;
aeb5d727 2283 fmode_t f_mode = file->f_mode;
1da177e4 2284
7eaa943c
TI		 2285 if (rpcm_oss_file)
2286 *rpcm_oss_file = NULL;
1da177e4 2287
ca2c0966 2288 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 2289 if (pcm_oss_file == NULL)
2290 return -ENOMEM;
2291
2292 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2293 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2294 f_mode = FMODE_WRITE;
3bf75f9b 2295
0df63e44 2296 file->f_flags &= ~O_APPEND;
3bf75f9b 2297 for (idx = 0; idx < 2; idx++) {
060d77b9 2298 if (setup[idx].disable)
3bf75f9b 2299 continue;
6cb53e7e
TI		 2300 if (! pcm->streams[idx].substream_count)
2301 continue; /* no matching substream */
3bf75f9b
TI		 2302 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2303 if (! (f_mode & FMODE_WRITE))
2304 continue;
2305 } else {
2306 if (! (f_mode & FMODE_READ))
2307 continue;
2308 }
2309 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2310 if (err < 0) {
1da177e4
LT		 2311 snd_pcm_oss_release_file(pcm_oss_file);
2312 return err;
2313 }
3bf75f9b
TI		 2314
2315 pcm_oss_file->streams[idx] = substream;
1576274d 2316 substream->file = pcm_oss_file;
060d77b9 2317 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2318 }
2319
bbdc1b7d 2320 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2321 snd_pcm_oss_release_file(pcm_oss_file);
2322 return -EINVAL;
2323 }
1da177e4
LT		 2324
2325 file->private_data = pcm_oss_file;
7eaa943c
TI		 2326 if (rpcm_oss_file)
2327 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2328 return 0;
2329}
2330
2331
93f2e378
TI		 2332static int snd_task_name(struct task_struct *task, char *name, size_t size)
2333{
2334 unsigned int idx;
2335
7eaa943c
TI		 2336 if (snd_BUG_ON(!task || !name || size < 2))
2337 return -EINVAL;
93f2e378
TI		 2338 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2339 name[idx] = task->comm[idx];
2340 name[idx] = '\0';
2341 return 0;
2342}
2343
1da177e4
LT		 2344static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2345{
1da177e4
LT		 2346 int err;
2347 char task_name[32];
6ac77bc1
TI		 2348 struct snd_pcm *pcm;
2349 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2350 struct snd_pcm_oss_setup setup[2];
1da177e4 2351 int nonblock;
ac6424b9 2352 wait_queue_entry_t wait;
1da177e4 2353
02f4865f
TI		 2354 err = nonseekable_open(inode, file);
2355 if (err < 0)
2356 return err;
2357
f87135f5
CL		 2358 pcm = snd_lookup_oss_minor_data(iminor(inode),
2359 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 2360 if (pcm == NULL) {
2361 err = -ENODEV;
2362 goto __error1;
2363 }
2364 err = snd_card_file_add(pcm->card, file);
2365 if (err < 0)
2366 goto __error1;
2367 if (!try_module_get(pcm->card->module)) {
2368 err = -EFAULT;
2369 goto __error2;
2370 }
2371 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2372 err = -EFAULT;
2373 goto __error;
2374 }
1576274d 2375 memset(setup, 0, sizeof(setup));
1da177e4 2376 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2377 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2378 task_name, &setup[0]);
1da177e4 2379 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2380 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2381 task_name, &setup[1]);
1da177e4
LT		 2382
2383 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2384 if (!nonblock)
2385 nonblock = nonblock_open;
2386
2387 init_waitqueue_entry(&wait, current);
2388 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2389 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2390 while (1) {
2391 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2392 iminor(inode), setup);
1da177e4
LT		 2393 if (err >= 0)
2394 break;
2395 if (err == -EAGAIN) {
2396 if (nonblock) {
2397 err = -EBUSY;
2398 break;
2399 }
2400 } else
2401 break;
2402 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2403 mutex_unlock(&pcm->open_mutex);
1da177e4 2404 schedule();
1a60d4c5 2405 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2406 if (pcm->card->shutdown) {
2407 err = -ENODEV;
2408 break;
2409 }
1da177e4
LT		 2410 if (signal_pending(current)) {
2411 err = -ERESTARTSYS;
2412 break;
2413 }
2414 }
2415 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2416 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2417 if (err < 0)
2418 goto __error;
8bb4d9ce 2419 snd_card_unref(pcm->card);
1da177e4
LT		 2420 return err;
2421
2422 __error:
2423 module_put(pcm->card->module);
2424 __error2:
2425 snd_card_file_remove(pcm->card, file);
2426 __error1:
a0830dbd
TI		 2427 if (pcm)
2428 snd_card_unref(pcm->card);
1da177e4
LT		 2429 return err;
2430}
2431
2432static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2433{
6ac77bc1
TI		 2434 struct snd_pcm *pcm;
2435 struct snd_pcm_substream *substream;
2436 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2437
2438 pcm_oss_file = file->private_data;
2439 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2440 if (substream == NULL)
2441 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
7eaa943c
TI		 2442 if (snd_BUG_ON(!substream))
2443 return -ENXIO;
1da177e4 2444 pcm = substream->pcm;
de1b8b93
TI		 2445 if (!pcm->card->shutdown)
2446 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2447 mutex_lock(&pcm->open_mutex);
1da177e4 2448 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2449 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2450 wake_up(&pcm->open_wait);
2451 module_put(pcm->card->module);
2452 snd_card_file_remove(pcm->card, file);
2453 return 0;
2454}
2455
2456static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2457{
6ac77bc1 2458 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2459 int __user *p = (int __user *)arg;
2460 int res;
2461
2462 pcm_oss_file = file->private_data;
2463 if (cmd == OSS_GETVERSION)
2464 return put_user(SNDRV_OSS_VERSION, p);
2465 if (cmd == OSS_ALSAEMULVER)
2466 return put_user(1, p);
658355b5 2467#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
1da177e4 2468 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2469 struct snd_pcm_substream *substream;
1da177e4
LT		 2470 int idx;
2471 for (idx = 0; idx < 2; ++idx) {
2472 substream = pcm_oss_file->streams[idx];
2473 if (substream != NULL)
2474 break;
2475 }
7eaa943c
TI		 2476 if (snd_BUG_ON(idx >= 2))
2477 return -ENXIO;
1da177e4
LT		 2478 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2479 }
2480#endif
2481 if (((cmd >> 8) & 0xff) != 'P')
2482 return -EINVAL;
2483#ifdef OSS_DEBUG
61efcee8 2484 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 2485#endif
2486 switch (cmd) {
2487 case SNDCTL_DSP_RESET:
2488 return snd_pcm_oss_reset(pcm_oss_file);
2489 case SNDCTL_DSP_SYNC:
2490 return snd_pcm_oss_sync(pcm_oss_file);
2491 case SNDCTL_DSP_SPEED:
2492 if (get_user(res, p))
2493 return -EFAULT;
2494 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2495 return res;
2496 return put_user(res, p);
2497 case SOUND_PCM_READ_RATE:
2498 res = snd_pcm_oss_get_rate(pcm_oss_file);
2499 if (res < 0)
2500 return res;
2501 return put_user(res, p);
2502 case SNDCTL_DSP_STEREO:
2503 if (get_user(res, p))
2504 return -EFAULT;
2505 res = res > 0 ? 2 : 1;
2506 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2507 return res;
2508 return put_user(--res, p);
2509 case SNDCTL_DSP_GETBLKSIZE:
2510 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2511 if (res < 0)
2512 return res;
2513 return put_user(res, p);
2514 case SNDCTL_DSP_SETFMT:
2515 if (get_user(res, p))
2516 return -EFAULT;
2517 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2518 if (res < 0)
2519 return res;
2520 return put_user(res, p);
2521 case SOUND_PCM_READ_BITS:
2522 res = snd_pcm_oss_get_format(pcm_oss_file);
2523 if (res < 0)
2524 return res;
2525 return put_user(res, p);
2526 case SNDCTL_DSP_CHANNELS:
2527 if (get_user(res, p))
2528 return -EFAULT;
2529 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2530 if (res < 0)
2531 return res;
2532 return put_user(res, p);
2533 case SOUND_PCM_READ_CHANNELS:
2534 res = snd_pcm_oss_get_channels(pcm_oss_file);
2535 if (res < 0)
2536 return res;
2537 return put_user(res, p);
2538 case SOUND_PCM_WRITE_FILTER:
2539 case SOUND_PCM_READ_FILTER:
2540 return -EIO;
2541 case SNDCTL_DSP_POST:
2542 return snd_pcm_oss_post(pcm_oss_file);
2543 case SNDCTL_DSP_SUBDIVIDE:
2544 if (get_user(res, p))
2545 return -EFAULT;
2546 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2547 if (res < 0)
2548 return res;
2549 return put_user(res, p);
2550 case SNDCTL_DSP_SETFRAGMENT:
2551 if (get_user(res, p))
2552 return -EFAULT;
2553 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2554 case SNDCTL_DSP_GETFMTS:
2555 res = snd_pcm_oss_get_formats(pcm_oss_file);
2556 if (res < 0)
2557 return res;
2558 return put_user(res, p);
2559 case SNDCTL_DSP_GETOSPACE:
2560 case SNDCTL_DSP_GETISPACE:
2561 return snd_pcm_oss_get_space(pcm_oss_file,
2562 cmd == SNDCTL_DSP_GETISPACE ?
2563 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2564 (struct audio_buf_info __user *) arg);
2565 case SNDCTL_DSP_NONBLOCK:
2566 return snd_pcm_oss_nonblock(file);
2567 case SNDCTL_DSP_GETCAPS:
2568 res = snd_pcm_oss_get_caps(pcm_oss_file);
2569 if (res < 0)
2570 return res;
2571 return put_user(res, p);
2572 case SNDCTL_DSP_GETTRIGGER:
2573 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2574 if (res < 0)
2575 return res;
2576 return put_user(res, p);
2577 case SNDCTL_DSP_SETTRIGGER:
2578 if (get_user(res, p))
2579 return -EFAULT;
2580 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2581 case SNDCTL_DSP_GETIPTR:
2582 case SNDCTL_DSP_GETOPTR:
2583 return snd_pcm_oss_get_ptr(pcm_oss_file,
2584 cmd == SNDCTL_DSP_GETIPTR ?
2585 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2586 (struct count_info __user *) arg);
2587 case SNDCTL_DSP_MAPINBUF:
2588 case SNDCTL_DSP_MAPOUTBUF:
2589 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2590 cmd == SNDCTL_DSP_MAPINBUF ?
2591 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2592 (struct buffmem_desc __user *) arg);
2593 case SNDCTL_DSP_SETSYNCRO:
2594 /* stop DMA now.. */
2595 return 0;
2596 case SNDCTL_DSP_SETDUPLEX:
2597 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2598 return 0;
2599 return -EIO;
2600 case SNDCTL_DSP_GETODELAY:
2601 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2602 if (res < 0) {
2603 /* it's for sure, some broken apps don't check for error codes */
2604 put_user(0, p);
2605 return res;
2606 }
2607 return put_user(res, p);
2608 case SNDCTL_DSP_PROFILE:
2609 return 0; /* silently ignore */
2610 default:
61efcee8 2611 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
1da177e4
LT		 2612 }
2613 return -EINVAL;
2614}
2615
2616#ifdef CONFIG_COMPAT
2617/* all compatible */
83266b6b
TI		 2618static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2619 unsigned long arg)
2620{
2621 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2622}
1da177e4
LT		 2623#else
2624#define snd_pcm_oss_ioctl_compat NULL
2625#endif
2626
2627static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2628{
6ac77bc1
TI		 2629 struct snd_pcm_oss_file *pcm_oss_file;
2630 struct snd_pcm_substream *substream;
1da177e4
LT		 2631
2632 pcm_oss_file = file->private_data;
2633 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2634 if (substream == NULL)
2635 return -ENXIO;
0df63e44 2636 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 2637#ifndef OSS_DEBUG
2638 return snd_pcm_oss_read1(substream, buf, count);
2639#else
2640 {
2641 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
61efcee8
TI		 2642 pcm_dbg(substream->pcm,
2643 "pcm_oss: read %li bytes (returned %li bytes)\n",
2644 (long)count, (long)res);
1da177e4
LT		 2645 return res;
2646 }
2647#endif
2648}
2649
2650static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2651{
6ac77bc1
TI		 2652 struct snd_pcm_oss_file *pcm_oss_file;
2653 struct snd_pcm_substream *substream;
1da177e4
LT		 2654 long result;
2655
2656 pcm_oss_file = file->private_data;
2657 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2658 if (substream == NULL)
2659 return -ENXIO;
0df63e44 2660 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2661 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2662#ifdef OSS_DEBUG
61efcee8 2663 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
006de267 2664 (long)count, (long)result);
1da177e4
LT		 2665#endif
2666 return result;
2667}
2668
6ac77bc1 2669static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2670{
6ac77bc1 2671 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2672 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2673 return runtime->oss.prev_hw_ptr_period !=
2674 get_hw_ptr_period(runtime);
1da177e4 2675 else
f240406b
JK		 2676 return snd_pcm_playback_avail(runtime) >=
2677 runtime->oss.period_frames;
1da177e4
LT		 2678}
2679
6ac77bc1 2680static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2681{
6ac77bc1 2682 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2683 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2684 return runtime->oss.prev_hw_ptr_period !=
2685 get_hw_ptr_period(runtime);
1da177e4 2686 else
f240406b
JK		 2687 return snd_pcm_capture_avail(runtime) >=
2688 runtime->oss.period_frames;
1da177e4
LT		 2689}
2690
2691static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2692{
6ac77bc1 2693 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4 2694 unsigned int mask;
6ac77bc1 2695 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2696
2697 pcm_oss_file = file->private_data;
2698
2699 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2700 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2701
2702 mask = 0;
2703 if (psubstream != NULL) {
6ac77bc1 2704 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2705 poll_wait(file, &runtime->sleep, wait);
2706 snd_pcm_stream_lock_irq(psubstream);
2707 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2708 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2709 snd_pcm_oss_playback_ready(psubstream)))
2710 mask |= POLLOUT | POLLWRNORM;
2711 snd_pcm_stream_unlock_irq(psubstream);
2712 }
2713 if (csubstream != NULL) {
6ac77bc1
TI		 2714 struct snd_pcm_runtime *runtime = csubstream->runtime;
2715 snd_pcm_state_t ostate;
1da177e4
LT		 2716 poll_wait(file, &runtime->sleep, wait);
2717 snd_pcm_stream_lock_irq(csubstream);
2718 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2719 snd_pcm_oss_capture_ready(csubstream))
2720 mask |= POLLIN | POLLRDNORM;
2721 snd_pcm_stream_unlock_irq(csubstream);
2722 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2723 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2724 memset(&ofile, 0, sizeof(ofile));
2725 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2726 runtime->oss.trigger = 0;
2727 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2728 }
2729 }
2730
2731 return mask;
2732}
2733
2734static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2735{
6ac77bc1
TI		 2736 struct snd_pcm_oss_file *pcm_oss_file;
2737 struct snd_pcm_substream *substream = NULL;
2738 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2739 int err;
2740
2741#ifdef OSS_DEBUG
61efcee8 2742 pr_debug("pcm_oss: mmap begin\n");
1da177e4
LT		 2743#endif
2744 pcm_oss_file = file->private_data;
2745 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2746 case VM_READ | VM_WRITE:
2747 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2748 if (substream)
2749 break;
2750 /* Fall through */
2751 case VM_READ:
2752 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2753 break;
2754 case VM_WRITE:
2755 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2756 break;
2757 default:
2758 return -EINVAL;
2759 }
2760 /* set VM_READ access as well to fix memset() routines that do
2761 reads before writes (to improve performance) */
2762 area->vm_flags |= VM_READ;
2763 if (substream == NULL)
2764 return -ENXIO;
2765 runtime = substream->runtime;
2766 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2767 return -EIO;
2768 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2769 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2770 else
2771 return -EIO;
2772
2773 if (runtime->oss.params) {
b2483716
TI		 2774 /* use mutex_trylock() for params_lock for avoiding a deadlock
2775 * between mmap_sem and params_lock taken by
2776 * copy_from/to_user() in snd_pcm_oss_write/read()
2777 */
2778 err = snd_pcm_oss_change_params(substream, true);
2779 if (err < 0)
1da177e4
LT		 2780 return err;
2781 }
21a3479a 2782#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2783 if (runtime->oss.plugin_first != NULL)
2784 return -EIO;
21a3479a 2785#endif
1da177e4
LT		 2786
2787 if (area->vm_pgoff != 0)
2788 return -EINVAL;
2789
2790 err = snd_pcm_mmap_data(substream, file, area);
2791 if (err < 0)
2792 return err;
2793 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2794 runtime->silence_threshold = 0;
2795 runtime->silence_size = 0;
2796#ifdef OSS_DEBUG
61efcee8 2797 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
006de267 2798 runtime->oss.mmap_bytes);
1da177e4
LT		 2799#endif
2800 /* In mmap mode we never stop */
2801 runtime->stop_threshold = runtime->boundary;
2802
2803 return 0;
2804}
2805
b7d90a35 2806#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2807/*
2808 * /proc interface
2809 */
2810
6ac77bc1
TI		 2811static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2812 struct snd_info_buffer *buffer)
1da177e4 2813{
6ac77bc1
TI		 2814 struct snd_pcm_str *pstr = entry->private_data;
2815 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2816 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2817 while (setup) {
2818 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2819 setup->task_name,
2820 setup->periods,
2821 setup->period_size,
2822 setup->disable ? " disable" : "",
2823 setup->direct ? " direct" : "",
2824 setup->block ? " block" : "",
2825 setup->nonblock ? " non-block" : "",
2826 setup->partialfrag ? " partial-frag" : "",
2827 setup->nosilence ? " no-silence" : "");
2828 setup = setup->next;
2829 }
1a60d4c5 2830 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2831}
2832
6ac77bc1 2833static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2834{
6ac77bc1 2835 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2836
1da177e4
LT		 2837 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2838 setup; setup = setupn) {
2839 setupn = setup->next;
2840 kfree(setup->task_name);
2841 kfree(setup);
2842 }
2843 pstr->oss.setup_list = NULL;
2844}
2845
6ac77bc1
TI		 2846static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2847 struct snd_info_buffer *buffer)
1da177e4 2848{
6ac77bc1 2849 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2850 char line[128], str[32], task_name[32];
2851 const char *ptr;
1da177e4 2852 int idx1;
6ac77bc1 2853 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2854
2855 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2856 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2857 memset(&template, 0, sizeof(template));
2858 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2859 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2860 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2861 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2862 continue;
2863 }
2864 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2865 if (!strcmp(setup->task_name, task_name)) {
2866 template = *setup;
2867 break;
2868 }
2869 }
2870 ptr = snd_info_get_str(str, ptr, sizeof(str));
2871 template.periods = simple_strtoul(str, NULL, 10);
2872 ptr = snd_info_get_str(str, ptr, sizeof(str));
2873 template.period_size = simple_strtoul(str, NULL, 10);
2874 for (idx1 = 31; idx1 >= 0; idx1--)
2875 if (template.period_size & (1 << idx1))
2876 break;
2877 for (idx1--; idx1 >= 0; idx1--)
2878 template.period_size &= ~(1 << idx1);
2879 do {
2880 ptr = snd_info_get_str(str, ptr, sizeof(str));
2881 if (!strcmp(str, "disable")) {
2882 template.disable = 1;
2883 } else if (!strcmp(str, "direct")) {
2884 template.direct = 1;
2885 } else if (!strcmp(str, "block")) {
2886 template.block = 1;
2887 } else if (!strcmp(str, "non-block")) {
2888 template.nonblock = 1;
2889 } else if (!strcmp(str, "partial-frag")) {
2890 template.partialfrag = 1;
2891 } else if (!strcmp(str, "no-silence")) {
2892 template.nosilence = 1;
10f69f9e
TI		 2893 } else if (!strcmp(str, "buggy-ptr")) {
2894 template.buggyptr = 1;
1da177e4
LT		 2895 }
2896 } while (*str);
2897 if (setup == NULL) {
060d77b9
TI		 2898 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2899 if (! setup) {
2900 buffer->error = -ENOMEM;
91054598 2901 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9
TI		 2902 return;
2903 }
2904 if (pstr->oss.setup_list == NULL)
2905 pstr->oss.setup_list = setup;
2906 else {
2907 for (setup1 = pstr->oss.setup_list;
2908 setup1->next; setup1 = setup1->next);
2909 setup1->next = setup;
2910 }
2911 template.task_name = kstrdup(task_name, GFP_KERNEL);
2912 if (! template.task_name) {
2913 kfree(setup);
1da177e4 2914 buffer->error = -ENOMEM;
91054598 2915 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9 2916 return;
1da177e4
LT		 2917 }
2918 }
060d77b9 2919 *setup = template;
1a60d4c5 2920 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2921 }
2922}
2923
6ac77bc1 2924static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 2925{
2926 int stream;
2927 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 2928 struct snd_info_entry *entry;
2929 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 2930 if (pstr->substream_count == 0)
2931 continue;
2932 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2933 entry->content = SNDRV_INFO_CONTENT_TEXT;
2934 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
1da177e4 2935 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 2936 entry->c.text.write = snd_pcm_oss_proc_write;
2937 entry->private_data = pstr;
2938 if (snd_info_register(entry) < 0) {
2939 snd_info_free_entry(entry);
2940 entry = NULL;
2941 }
2942 }
2943 pstr->oss.proc_entry = entry;
2944 }
2945}
2946
6ac77bc1 2947static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 2948{
2949 int stream;
2950 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 2951 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 2952 snd_info_free_entry(pstr->oss.proc_entry);
2953 pstr->oss.proc_entry = NULL;
2954 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 2955 }
2956}
b7d90a35 2957#else /* !CONFIG_SND_VERBOSE_PROCFS */
04f141a8
TI		 2958#define snd_pcm_oss_proc_init(pcm)
2959#define snd_pcm_oss_proc_done(pcm)
b7d90a35 2960#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 2961
2962/*
2963 * ENTRY functions
2964 */
2965
9c2e08c5 2966static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 2967{
2968 .owner = THIS_MODULE,
2969 .read = snd_pcm_oss_read,
2970 .write = snd_pcm_oss_write,
2971 .open = snd_pcm_oss_open,
2972 .release = snd_pcm_oss_release,
02f4865f 2973 .llseek = no_llseek,
1da177e4
LT		 2974 .poll = snd_pcm_oss_poll,
2975 .unlocked_ioctl = snd_pcm_oss_ioctl,
2976 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2977 .mmap = snd_pcm_oss_mmap,
2978};
2979
6ac77bc1 2980static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4 2981{
1da177e4 2982 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 2983 pcm->card, index, &snd_pcm_oss_f_reg,
80d7d771 2984 pcm) < 0) {
61efcee8 2985 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
d3d579f8 2986 pcm->card->number, pcm->device);
1da177e4
LT		 2987 }
2988}
2989
6ac77bc1 2990static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 2991{
2992 pcm->oss.reg = 0;
896e6cc2 2993 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 2994 char name[128];
2995 int duplex;
2996 register_oss_dsp(pcm, 0);
2997 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2998 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2999 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3000 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3001#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3002 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3003 pcm->card->number,
3004 name);
3005#endif
3006 pcm->oss.reg++;
3007 pcm->oss.reg_mask |= 1;
3008 }
896e6cc2 3009 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3010 register_oss_dsp(pcm, 1);
3011 pcm->oss.reg++;
3012 pcm->oss.reg_mask |= 2;
3013 }
3014
3015 if (pcm->oss.reg)
3016 snd_pcm_oss_proc_init(pcm);
3017
3018 return 0;
3019}
3020
6ac77bc1 3021static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3022{
3023 if (pcm->oss.reg) {
3024 if (pcm->oss.reg_mask & 1) {
3025 pcm->oss.reg_mask &= ~1;
3026 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3027 pcm->card, 0);
3028 }
3029 if (pcm->oss.reg_mask & 2) {
3030 pcm->oss.reg_mask &= ~2;
3031 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3032 pcm->card, 1);
3033 }
896e6cc2 3034 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3035#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3036 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3037#endif
3038 }
3039 pcm->oss.reg = 0;
1da177e4
LT		 3040 }
3041 return 0;
3042}
3043
c461482c
TI		 3044static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3045{
3046 snd_pcm_oss_disconnect_minor(pcm);
3047 snd_pcm_oss_proc_done(pcm);
3048 return 0;
3049}
3050
6ac77bc1 3051static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3052{
3053 .n_register = snd_pcm_oss_register_minor,
3054 .n_disconnect = snd_pcm_oss_disconnect_minor,
3055 .n_unregister = snd_pcm_oss_unregister_minor,
3056};
3057
3058static int __init alsa_pcm_oss_init(void)
3059{
3060 int i;
3061 int err;
3062
3063 /* check device map table */
3064 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3065 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3066 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
d3d579f8 3067 i, dsp_map[i]);
1da177e4
LT		 3068 dsp_map[i] = 0;
3069 }
896e6cc2 3070 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3071 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
d3d579f8 3072 i, adsp_map[i]);
1da177e4
LT		 3073 adsp_map[i] = 1;
3074 }
3075 }
3076 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3077 return err;
3078 return 0;
3079}
3080
3081static void __exit alsa_pcm_oss_exit(void)
3082{
3083 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3084}
3085
3086module_init(alsa_pcm_oss_init)
3087module_exit(alsa_pcm_oss_exit)
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