Loading...
1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/time.h>
32#include <linux/vmalloc.h>
33#include <linux/moduleparam.h>
34#include <linux/math64.h>
35#include <linux/string.h>
36#include <sound/core.h>
37#include <sound/minors.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include "pcm_plugin.h"
41#include <sound/info.h>
42#include <linux/soundcard.h>
43#include <sound/initval.h>
44#include <sound/mixer_oss.h>
45
46#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
48static int dsp_map[SNDRV_CARDS];
49static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50static int nonblock_open = 1;
51
52MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54MODULE_LICENSE("GPL");
55module_param_array(dsp_map, int, NULL, 0444);
56MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57module_param_array(adsp_map, int, NULL, 0444);
58MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59module_param(nonblock_open, bool, 0644);
60MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
64static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68static inline mm_segment_t snd_enter_user(void)
69{
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73}
74
75static inline void snd_leave_user(mm_segment_t fs)
76{
77 set_fs(fs);
78}
79
80/*
81 * helper functions to process hw_params
82 */
83static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84{
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105}
106
107static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108{
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129}
130
131static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132{
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139}
140
141/**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149static unsigned int
150snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152{
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165}
166
167/**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175static unsigned int
176snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178{
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191}
192
193static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196{
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204}
205
206static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210{
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220}
221
222static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225{
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251}
252
253/**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269{
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279}
280
281static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284{
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312}
313
314/**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330{
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340}
341
342static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345{
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356}
357
358static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360{
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372}
373
374/* Return 1 if min is nearer to best than max */
375static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378{
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384}
385
386/**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404{
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 if (max < 0) {
457 kfree(save);
458 return max;
459 }
460 last = 1;
461 }
462 _end:
463 kfree(save);
464 if (last)
465 v = snd_pcm_hw_param_last(pcm, params, var, dir);
466 else
467 v = snd_pcm_hw_param_first(pcm, params, var, dir);
468 snd_BUG_ON(v < 0);
469 return v;
470}
471
472static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473 snd_pcm_hw_param_t var, unsigned int val,
474 int dir)
475{
476 int changed;
477 if (hw_is_mask(var)) {
478 struct snd_mask *m = hw_param_mask(params, var);
479 if (val == 0 && dir < 0) {
480 changed = -EINVAL;
481 snd_mask_none(m);
482 } else {
483 if (dir > 0)
484 val++;
485 else if (dir < 0)
486 val--;
487 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488 }
489 } else if (hw_is_interval(var)) {
490 struct snd_interval *i = hw_param_interval(params, var);
491 if (val == 0 && dir < 0) {
492 changed = -EINVAL;
493 snd_interval_none(i);
494 } else if (dir == 0)
495 changed = snd_interval_refine_set(i, val);
496 else {
497 struct snd_interval t;
498 t.openmin = 1;
499 t.openmax = 1;
500 t.empty = 0;
501 t.integer = 0;
502 if (dir < 0) {
503 t.min = val - 1;
504 t.max = val;
505 } else {
506 t.min = val;
507 t.max = val+1;
508 }
509 changed = snd_interval_refine(i, &t);
510 }
511 } else
512 return -EINVAL;
513 if (changed) {
514 params->cmask |= 1 << var;
515 params->rmask |= 1 << var;
516 }
517 return changed;
518}
519
520/**
521 * snd_pcm_hw_param_set
522 * @pcm: PCM instance
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
525 * @val: value to set
526 * @dir: pointer to the direction (-1,0,1) or NULL
527 *
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
531 */
532static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533 struct snd_pcm_hw_params *params,
534 snd_pcm_hw_param_t var, unsigned int val,
535 int dir)
536{
537 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
538 if (changed < 0)
539 return changed;
540 if (params->rmask) {
541 int err = snd_pcm_hw_refine(pcm, params);
542 if (err < 0)
543 return err;
544 }
545 return snd_pcm_hw_param_value(params, var, NULL);
546}
547
548static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549 snd_pcm_hw_param_t var)
550{
551 int changed;
552 changed = snd_interval_setinteger(hw_param_interval(params, var));
553 if (changed) {
554 params->cmask |= 1 << var;
555 params->rmask |= 1 << var;
556 }
557 return changed;
558}
559
560/*
561 * plugin
562 */
563
564#ifdef CONFIG_SND_PCM_OSS_PLUGINS
565static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
566{
567 struct snd_pcm_runtime *runtime = substream->runtime;
568 struct snd_pcm_plugin *plugin, *next;
569
570 plugin = runtime->oss.plugin_first;
571 while (plugin) {
572 next = plugin->next;
573 snd_pcm_plugin_free(plugin);
574 plugin = next;
575 }
576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
577 return 0;
578}
579
580static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
581{
582 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
583 plugin->next = runtime->oss.plugin_first;
584 plugin->prev = NULL;
585 if (runtime->oss.plugin_first) {
586 runtime->oss.plugin_first->prev = plugin;
587 runtime->oss.plugin_first = plugin;
588 } else {
589 runtime->oss.plugin_last =
590 runtime->oss.plugin_first = plugin;
591 }
592 return 0;
593}
594
595int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
596{
597 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
598 plugin->next = NULL;
599 plugin->prev = runtime->oss.plugin_last;
600 if (runtime->oss.plugin_last) {
601 runtime->oss.plugin_last->next = plugin;
602 runtime->oss.plugin_last = plugin;
603 } else {
604 runtime->oss.plugin_last =
605 runtime->oss.plugin_first = plugin;
606 }
607 return 0;
608}
609#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
610
611static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
612{
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
615 long bytes = frames_to_bytes(runtime, frames);
616 if (buffer_size == runtime->oss.buffer_bytes)
617 return bytes;
618#if BITS_PER_LONG >= 64
619 return runtime->oss.buffer_bytes * bytes / buffer_size;
620#else
621 {
622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
623 return div_u64(bsize, buffer_size);
624 }
625#endif
626}
627
628static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
629{
630 struct snd_pcm_runtime *runtime = substream->runtime;
631 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
632 if (buffer_size == runtime->oss.buffer_bytes)
633 return bytes_to_frames(runtime, bytes);
634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
635}
636
637static inline
638snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
639{
640 return runtime->hw_ptr_interrupt;
641}
642
643/* define extended formats in the recent OSS versions (if any) */
644/* linear formats */
645#define AFMT_S32_LE 0x00001000
646#define AFMT_S32_BE 0x00002000
647#define AFMT_S24_LE 0x00008000
648#define AFMT_S24_BE 0x00010000
649#define AFMT_S24_PACKED 0x00040000
650
651/* other supported formats */
652#define AFMT_FLOAT 0x00004000
653#define AFMT_SPDIF_RAW 0x00020000
654
655/* unsupported formats */
656#define AFMT_AC3 0x00000400
657#define AFMT_VORBIS 0x00000800
658
659static snd_pcm_format_t snd_pcm_oss_format_from(int format)
660{
661 switch (format) {
662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
679 default: return SNDRV_PCM_FORMAT_U8;
680 }
681}
682
683static int snd_pcm_oss_format_to(snd_pcm_format_t format)
684{
685 switch (format) {
686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
703 default: return -EINVAL;
704 }
705}
706
707static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
708 struct snd_pcm_hw_params *oss_params,
709 struct snd_pcm_hw_params *slave_params)
710{
711 size_t s;
712 size_t oss_buffer_size, oss_period_size, oss_periods;
713 size_t min_period_size, max_period_size;
714 struct snd_pcm_runtime *runtime = substream->runtime;
715 size_t oss_frame_size;
716
717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718 params_channels(oss_params) / 8;
719
720 oss_buffer_size = snd_pcm_plug_client_size(substream,
721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722 oss_buffer_size = 1 << ld2(oss_buffer_size);
723 if (atomic_read(&substream->mmap_count)) {
724 if (oss_buffer_size > runtime->oss.mmap_bytes)
725 oss_buffer_size = runtime->oss.mmap_bytes;
726 }
727
728 if (substream->oss.setup.period_size > 16)
729 oss_period_size = substream->oss.setup.period_size;
730 else if (runtime->oss.fragshift) {
731 oss_period_size = 1 << runtime->oss.fragshift;
732 if (oss_period_size > oss_buffer_size / 2)
733 oss_period_size = oss_buffer_size / 2;
734 } else {
735 int sd;
736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
737
738 oss_period_size = oss_buffer_size;
739 do {
740 oss_period_size /= 2;
741 } while (oss_period_size > bytes_per_sec);
742 if (runtime->oss.subdivision == 0) {
743 sd = 4;
744 if (oss_period_size / sd > 4096)
745 sd *= 2;
746 if (oss_period_size / sd < 4096)
747 sd = 1;
748 } else
749 sd = runtime->oss.subdivision;
750 oss_period_size /= sd;
751 if (oss_period_size < 16)
752 oss_period_size = 16;
753 }
754
755 min_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 min_period_size *= oss_frame_size;
758 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
759 if (oss_period_size < min_period_size)
760 oss_period_size = min_period_size;
761
762 max_period_size = snd_pcm_plug_client_size(substream,
763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764 max_period_size *= oss_frame_size;
765 max_period_size = 1 << ld2(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
768
769 oss_periods = oss_buffer_size / oss_period_size;
770
771 if (substream->oss.setup.periods > 1)
772 oss_periods = substream->oss.setup.periods;
773
774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776 s = runtime->oss.maxfrags;
777 if (oss_periods > s)
778 oss_periods = s;
779
780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
781 if (s < 2)
782 s = 2;
783 if (oss_periods < s)
784 oss_periods = s;
785
786 while (oss_period_size * oss_periods > oss_buffer_size)
787 oss_period_size /= 2;
788
789 if (oss_period_size < 16)
790 return -EINVAL;
791 runtime->oss.period_bytes = oss_period_size;
792 runtime->oss.period_frames = 1;
793 runtime->oss.periods = oss_periods;
794 return 0;
795}
796
797static int choose_rate(struct snd_pcm_substream *substream,
798 struct snd_pcm_hw_params *params, unsigned int best_rate)
799{
800 struct snd_interval *it;
801 struct snd_pcm_hw_params *save;
802 unsigned int rate, prev;
803
804 save = kmalloc(sizeof(*save), GFP_KERNEL);
805 if (save == NULL)
806 return -ENOMEM;
807 *save = *params;
808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
809
810 /* try multiples of the best rate */
811 rate = best_rate;
812 for (;;) {
813 if (it->max < rate || (it->max == rate && it->openmax))
814 break;
815 if (it->min < rate || (it->min == rate && !it->openmin)) {
816 int ret;
817 ret = snd_pcm_hw_param_set(substream, params,
818 SNDRV_PCM_HW_PARAM_RATE,
819 rate, 0);
820 if (ret == (int)rate) {
821 kfree(save);
822 return rate;
823 }
824 *params = *save;
825 }
826 prev = rate;
827 rate += best_rate;
828 if (rate <= prev)
829 break;
830 }
831
832 /* not found, use the nearest rate */
833 kfree(save);
834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
835}
836
837static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
838{
839 struct snd_pcm_runtime *runtime = substream->runtime;
840 struct snd_pcm_hw_params *params, *sparams;
841 struct snd_pcm_sw_params *sw_params;
842 ssize_t oss_buffer_size, oss_period_size;
843 size_t oss_frame_size;
844 int err;
845 int direct;
846 snd_pcm_format_t format, sformat;
847 int n;
848 struct snd_mask sformat_mask;
849 struct snd_mask mask;
850
851 if (mutex_lock_interruptible(&runtime->oss.params_lock))
852 return -EINTR;
853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854 params = kmalloc(sizeof(*params), GFP_KERNEL);
855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856 if (!sw_params || !params || !sparams) {
857 snd_printd("No memory\n");
858 err = -ENOMEM;
859 goto failure;
860 }
861
862 if (atomic_read(&substream->mmap_count))
863 direct = 1;
864 else
865 direct = substream->oss.setup.direct;
866
867 _snd_pcm_hw_params_any(sparams);
868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
870 snd_mask_none(&mask);
871 if (atomic_read(&substream->mmap_count))
872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
873 else {
874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
875 if (!direct)
876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
877 }
878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879 if (err < 0) {
880 snd_printd("No usable accesses\n");
881 err = -EINVAL;
882 goto failure;
883 }
884 choose_rate(substream, sparams, runtime->oss.rate);
885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886
887 format = snd_pcm_oss_format_from(runtime->oss.format);
888
889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
890 if (direct)
891 sformat = format;
892 else
893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894
895 if ((__force int)sformat < 0 ||
896 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
897 for (sformat = (__force snd_pcm_format_t)0;
898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
900 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
901 snd_pcm_oss_format_to(sformat) >= 0)
902 break;
903 }
904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
905 snd_printd("Cannot find a format!!!\n");
906 err = -EINVAL;
907 goto failure;
908 }
909 }
910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
911 if (err < 0)
912 goto failure;
913
914 if (direct) {
915 memcpy(params, sparams, sizeof(*params));
916 } else {
917 _snd_pcm_hw_params_any(params);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
923 runtime->oss.channels, 0);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
925 runtime->oss.rate, 0);
926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
927 params_access(params), params_format(params),
928 params_channels(params), params_rate(params));
929 }
930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
931 params_access(sparams), params_format(sparams),
932 params_channels(sparams), params_rate(sparams));
933
934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
935 params_channels(params) / 8;
936
937#ifdef CONFIG_SND_PCM_OSS_PLUGINS
938 snd_pcm_oss_plugin_clear(substream);
939 if (!direct) {
940 /* add necessary plugins */
941 snd_pcm_oss_plugin_clear(substream);
942 if ((err = snd_pcm_plug_format_plugins(substream,
943 params,
944 sparams)) < 0) {
945 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
946 snd_pcm_oss_plugin_clear(substream);
947 goto failure;
948 }
949 if (runtime->oss.plugin_first) {
950 struct snd_pcm_plugin *plugin;
951 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
952 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
953 snd_pcm_oss_plugin_clear(substream);
954 goto failure;
955 }
956 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
957 err = snd_pcm_plugin_append(plugin);
958 } else {
959 err = snd_pcm_plugin_insert(plugin);
960 }
961 if (err < 0) {
962 snd_pcm_oss_plugin_clear(substream);
963 goto failure;
964 }
965 }
966 }
967#endif
968
969 err = snd_pcm_oss_period_size(substream, params, sparams);
970 if (err < 0)
971 goto failure;
972
973 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
974 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
975 if (err < 0)
976 goto failure;
977
978 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
979 runtime->oss.periods, NULL);
980 if (err < 0)
981 goto failure;
982
983 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
984
985 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
986 snd_printd("HW_PARAMS failed: %i\n", err);
987 goto failure;
988 }
989
990 memset(sw_params, 0, sizeof(*sw_params));
991 if (runtime->oss.trigger) {
992 sw_params->start_threshold = 1;
993 } else {
994 sw_params->start_threshold = runtime->boundary;
995 }
996 if (atomic_read(&substream->mmap_count) ||
997 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
998 sw_params->stop_threshold = runtime->boundary;
999 else
1000 sw_params->stop_threshold = runtime->buffer_size;
1001 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1002 sw_params->period_step = 1;
1003 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1004 1 : runtime->period_size;
1005 if (atomic_read(&substream->mmap_count) ||
1006 substream->oss.setup.nosilence) {
1007 sw_params->silence_threshold = 0;
1008 sw_params->silence_size = 0;
1009 } else {
1010 snd_pcm_uframes_t frames;
1011 frames = runtime->period_size + 16;
1012 if (frames > runtime->buffer_size)
1013 frames = runtime->buffer_size;
1014 sw_params->silence_threshold = frames;
1015 sw_params->silence_size = frames;
1016 }
1017
1018 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1019 snd_printd("SW_PARAMS failed: %i\n", err);
1020 goto failure;
1021 }
1022
1023 runtime->oss.periods = params_periods(sparams);
1024 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1025 if (oss_period_size < 0) {
1026 err = -EINVAL;
1027 goto failure;
1028 }
1029#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1030 if (runtime->oss.plugin_first) {
1031 err = snd_pcm_plug_alloc(substream, oss_period_size);
1032 if (err < 0)
1033 goto failure;
1034 }
1035#endif
1036 oss_period_size *= oss_frame_size;
1037
1038 oss_buffer_size = oss_period_size * runtime->oss.periods;
1039 if (oss_buffer_size < 0) {
1040 err = -EINVAL;
1041 goto failure;
1042 }
1043
1044 runtime->oss.period_bytes = oss_period_size;
1045 runtime->oss.buffer_bytes = oss_buffer_size;
1046
1047 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1048 runtime->oss.period_bytes,
1049 runtime->oss.buffer_bytes);
1050 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1051 params_period_size(sparams),
1052 params_buffer_size(sparams));
1053
1054 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1055 runtime->oss.channels = params_channels(params);
1056 runtime->oss.rate = params_rate(params);
1057
1058 vfree(runtime->oss.buffer);
1059 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1060 if (!runtime->oss.buffer) {
1061 err = -ENOMEM;
1062 goto failure;
1063 }
1064
1065 runtime->oss.params = 0;
1066 runtime->oss.prepare = 1;
1067 runtime->oss.buffer_used = 0;
1068 if (runtime->dma_area)
1069 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1070
1071 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1072
1073 err = 0;
1074failure:
1075 kfree(sw_params);
1076 kfree(params);
1077 kfree(sparams);
1078 mutex_unlock(&runtime->oss.params_lock);
1079 return err;
1080}
1081
1082static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1083{
1084 int idx, err;
1085 struct snd_pcm_substream *asubstream = NULL, *substream;
1086
1087 for (idx = 0; idx < 2; idx++) {
1088 substream = pcm_oss_file->streams[idx];
1089 if (substream == NULL)
1090 continue;
1091 if (asubstream == NULL)
1092 asubstream = substream;
1093 if (substream->runtime->oss.params) {
1094 err = snd_pcm_oss_change_params(substream);
1095 if (err < 0)
1096 return err;
1097 }
1098 }
1099 if (!asubstream)
1100 return -EIO;
1101 if (r_substream)
1102 *r_substream = asubstream;
1103 return 0;
1104}
1105
1106static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1107{
1108 int err;
1109 struct snd_pcm_runtime *runtime = substream->runtime;
1110
1111 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1112 if (err < 0) {
1113 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1114 return err;
1115 }
1116 runtime->oss.prepare = 0;
1117 runtime->oss.prev_hw_ptr_period = 0;
1118 runtime->oss.period_ptr = 0;
1119 runtime->oss.buffer_used = 0;
1120
1121 return 0;
1122}
1123
1124static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1125{
1126 struct snd_pcm_runtime *runtime;
1127 int err;
1128
1129 if (substream == NULL)
1130 return 0;
1131 runtime = substream->runtime;
1132 if (runtime->oss.params) {
1133 err = snd_pcm_oss_change_params(substream);
1134 if (err < 0)
1135 return err;
1136 }
1137 if (runtime->oss.prepare) {
1138 err = snd_pcm_oss_prepare(substream);
1139 if (err < 0)
1140 return err;
1141 }
1142 return 0;
1143}
1144
1145static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1146{
1147 struct snd_pcm_runtime *runtime;
1148 snd_pcm_uframes_t frames;
1149 int err = 0;
1150
1151 while (1) {
1152 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1153 if (err < 0)
1154 break;
1155 runtime = substream->runtime;
1156 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1157 break;
1158 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1159 /* until avail(delay) <= buffer_size */
1160 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1161 frames /= runtime->period_size;
1162 frames *= runtime->period_size;
1163 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1164 if (err < 0)
1165 break;
1166 }
1167 return err;
1168}
1169
1170snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1171{
1172 struct snd_pcm_runtime *runtime = substream->runtime;
1173 int ret;
1174 while (1) {
1175 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1176 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1177#ifdef OSS_DEBUG
1178 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1179 printk(KERN_DEBUG "pcm_oss: write: "
1180 "recovering from XRUN\n");
1181 else
1182 printk(KERN_DEBUG "pcm_oss: write: "
1183 "recovering from SUSPEND\n");
1184#endif
1185 ret = snd_pcm_oss_prepare(substream);
1186 if (ret < 0)
1187 break;
1188 }
1189 if (in_kernel) {
1190 mm_segment_t fs;
1191 fs = snd_enter_user();
1192 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1193 snd_leave_user(fs);
1194 } else {
1195 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1196 }
1197 if (ret != -EPIPE && ret != -ESTRPIPE)
1198 break;
1199 /* test, if we can't store new data, because the stream */
1200 /* has not been started */
1201 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202 return -EAGAIN;
1203 }
1204 return ret;
1205}
1206
1207snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208{
1209 struct snd_pcm_runtime *runtime = substream->runtime;
1210 snd_pcm_sframes_t delay;
1211 int ret;
1212 while (1) {
1213 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215#ifdef OSS_DEBUG
1216 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1217 printk(KERN_DEBUG "pcm_oss: read: "
1218 "recovering from XRUN\n");
1219 else
1220 printk(KERN_DEBUG "pcm_oss: read: "
1221 "recovering from SUSPEND\n");
1222#endif
1223 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1224 if (ret < 0)
1225 break;
1226 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1227 ret = snd_pcm_oss_prepare(substream);
1228 if (ret < 0)
1229 break;
1230 }
1231 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1232 if (ret < 0)
1233 break;
1234 if (in_kernel) {
1235 mm_segment_t fs;
1236 fs = snd_enter_user();
1237 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1238 snd_leave_user(fs);
1239 } else {
1240 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1241 }
1242 if (ret == -EPIPE) {
1243 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1244 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1245 if (ret < 0)
1246 break;
1247 }
1248 continue;
1249 }
1250 if (ret != -ESTRPIPE)
1251 break;
1252 }
1253 return ret;
1254}
1255
1256snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1257{
1258 struct snd_pcm_runtime *runtime = substream->runtime;
1259 int ret;
1260 while (1) {
1261 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1262 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1263#ifdef OSS_DEBUG
1264 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1265 printk(KERN_DEBUG "pcm_oss: writev: "
1266 "recovering from XRUN\n");
1267 else
1268 printk(KERN_DEBUG "pcm_oss: writev: "
1269 "recovering from SUSPEND\n");
1270#endif
1271 ret = snd_pcm_oss_prepare(substream);
1272 if (ret < 0)
1273 break;
1274 }
1275 if (in_kernel) {
1276 mm_segment_t fs;
1277 fs = snd_enter_user();
1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279 snd_leave_user(fs);
1280 } else {
1281 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1282 }
1283 if (ret != -EPIPE && ret != -ESTRPIPE)
1284 break;
1285
1286 /* test, if we can't store new data, because the stream */
1287 /* has not been started */
1288 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1289 return -EAGAIN;
1290 }
1291 return ret;
1292}
1293
1294snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1295{
1296 struct snd_pcm_runtime *runtime = substream->runtime;
1297 int ret;
1298 while (1) {
1299 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1300 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1301#ifdef OSS_DEBUG
1302 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1303 printk(KERN_DEBUG "pcm_oss: readv: "
1304 "recovering from XRUN\n");
1305 else
1306 printk(KERN_DEBUG "pcm_oss: readv: "
1307 "recovering from SUSPEND\n");
1308#endif
1309 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1310 if (ret < 0)
1311 break;
1312 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1313 ret = snd_pcm_oss_prepare(substream);
1314 if (ret < 0)
1315 break;
1316 }
1317 if (in_kernel) {
1318 mm_segment_t fs;
1319 fs = snd_enter_user();
1320 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1321 snd_leave_user(fs);
1322 } else {
1323 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1324 }
1325 if (ret != -EPIPE && ret != -ESTRPIPE)
1326 break;
1327 }
1328 return ret;
1329}
1330
1331static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1332{
1333 struct snd_pcm_runtime *runtime = substream->runtime;
1334 snd_pcm_sframes_t frames, frames1;
1335#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1336 if (runtime->oss.plugin_first) {
1337 struct snd_pcm_plugin_channel *channels;
1338 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1339 if (!in_kernel) {
1340 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1341 return -EFAULT;
1342 buf = runtime->oss.buffer;
1343 }
1344 frames = bytes / oss_frame_bytes;
1345 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1346 if (frames1 < 0)
1347 return frames1;
1348 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1349 if (frames1 <= 0)
1350 return frames1;
1351 bytes = frames1 * oss_frame_bytes;
1352 } else
1353#endif
1354 {
1355 frames = bytes_to_frames(runtime, bytes);
1356 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1357 if (frames1 <= 0)
1358 return frames1;
1359 bytes = frames_to_bytes(runtime, frames1);
1360 }
1361 return bytes;
1362}
1363
1364static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1365{
1366 size_t xfer = 0;
1367 ssize_t tmp;
1368 struct snd_pcm_runtime *runtime = substream->runtime;
1369
1370 if (atomic_read(&substream->mmap_count))
1371 return -ENXIO;
1372
1373 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1374 return tmp;
1375 mutex_lock(&runtime->oss.params_lock);
1376 while (bytes > 0) {
1377 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1378 tmp = bytes;
1379 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1380 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1381 if (tmp > 0) {
1382 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1383 tmp = -EFAULT;
1384 goto err;
1385 }
1386 }
1387 runtime->oss.buffer_used += tmp;
1388 buf += tmp;
1389 bytes -= tmp;
1390 xfer += tmp;
1391 if (substream->oss.setup.partialfrag ||
1392 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1393 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1394 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1395 if (tmp <= 0)
1396 goto err;
1397 runtime->oss.bytes += tmp;
1398 runtime->oss.period_ptr += tmp;
1399 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1400 if (runtime->oss.period_ptr == 0 ||
1401 runtime->oss.period_ptr == runtime->oss.buffer_used)
1402 runtime->oss.buffer_used = 0;
1403 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1404 tmp = -EAGAIN;
1405 goto err;
1406 }
1407 }
1408 } else {
1409 tmp = snd_pcm_oss_write2(substream,
1410 (const char __force *)buf,
1411 runtime->oss.period_bytes, 0);
1412 if (tmp <= 0)
1413 goto err;
1414 runtime->oss.bytes += tmp;
1415 buf += tmp;
1416 bytes -= tmp;
1417 xfer += tmp;
1418 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1419 tmp != runtime->oss.period_bytes)
1420 break;
1421 }
1422 }
1423 mutex_unlock(&runtime->oss.params_lock);
1424 return xfer;
1425
1426 err:
1427 mutex_unlock(&runtime->oss.params_lock);
1428 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1429}
1430
1431static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1432{
1433 struct snd_pcm_runtime *runtime = substream->runtime;
1434 snd_pcm_sframes_t frames, frames1;
1435#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1436 char __user *final_dst = (char __force __user *)buf;
1437 if (runtime->oss.plugin_first) {
1438 struct snd_pcm_plugin_channel *channels;
1439 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1440 if (!in_kernel)
1441 buf = runtime->oss.buffer;
1442 frames = bytes / oss_frame_bytes;
1443 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1444 if (frames1 < 0)
1445 return frames1;
1446 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1447 if (frames1 <= 0)
1448 return frames1;
1449 bytes = frames1 * oss_frame_bytes;
1450 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1451 return -EFAULT;
1452 } else
1453#endif
1454 {
1455 frames = bytes_to_frames(runtime, bytes);
1456 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1457 if (frames1 <= 0)
1458 return frames1;
1459 bytes = frames_to_bytes(runtime, frames1);
1460 }
1461 return bytes;
1462}
1463
1464static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1465{
1466 size_t xfer = 0;
1467 ssize_t tmp;
1468 struct snd_pcm_runtime *runtime = substream->runtime;
1469
1470 if (atomic_read(&substream->mmap_count))
1471 return -ENXIO;
1472
1473 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1474 return tmp;
1475 mutex_lock(&runtime->oss.params_lock);
1476 while (bytes > 0) {
1477 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1478 if (runtime->oss.buffer_used == 0) {
1479 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1480 if (tmp <= 0)
1481 goto err;
1482 runtime->oss.bytes += tmp;
1483 runtime->oss.period_ptr = tmp;
1484 runtime->oss.buffer_used = tmp;
1485 }
1486 tmp = bytes;
1487 if ((size_t) tmp > runtime->oss.buffer_used)
1488 tmp = runtime->oss.buffer_used;
1489 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1490 tmp = -EFAULT;
1491 goto err;
1492 }
1493 buf += tmp;
1494 bytes -= tmp;
1495 xfer += tmp;
1496 runtime->oss.buffer_used -= tmp;
1497 } else {
1498 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1499 runtime->oss.period_bytes, 0);
1500 if (tmp <= 0)
1501 goto err;
1502 runtime->oss.bytes += tmp;
1503 buf += tmp;
1504 bytes -= tmp;
1505 xfer += tmp;
1506 }
1507 }
1508 mutex_unlock(&runtime->oss.params_lock);
1509 return xfer;
1510
1511 err:
1512 mutex_unlock(&runtime->oss.params_lock);
1513 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1514}
1515
1516static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1517{
1518 struct snd_pcm_substream *substream;
1519 struct snd_pcm_runtime *runtime;
1520 int i;
1521
1522 for (i = 0; i < 2; i++) {
1523 substream = pcm_oss_file->streams[i];
1524 if (!substream)
1525 continue;
1526 runtime = substream->runtime;
1527 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1528 runtime->oss.prepare = 1;
1529 runtime->oss.buffer_used = 0;
1530 runtime->oss.prev_hw_ptr_period = 0;
1531 runtime->oss.period_ptr = 0;
1532 }
1533 return 0;
1534}
1535
1536static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1537{
1538 struct snd_pcm_substream *substream;
1539 int err;
1540
1541 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1542 if (substream != NULL) {
1543 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1544 return err;
1545 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1546 }
1547 /* note: all errors from the start action are ignored */
1548 /* OSS apps do not know, how to handle them */
1549 return 0;
1550}
1551
1552static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1553{
1554 struct snd_pcm_runtime *runtime;
1555 ssize_t result = 0;
1556 snd_pcm_state_t state;
1557 long res;
1558 wait_queue_t wait;
1559
1560 runtime = substream->runtime;
1561 init_waitqueue_entry(&wait, current);
1562 add_wait_queue(&runtime->sleep, &wait);
1563#ifdef OSS_DEBUG
1564 printk(KERN_DEBUG "sync1: size = %li\n", size);
1565#endif
1566 while (1) {
1567 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1568 if (result > 0) {
1569 runtime->oss.buffer_used = 0;
1570 result = 0;
1571 break;
1572 }
1573 if (result != 0 && result != -EAGAIN)
1574 break;
1575 result = 0;
1576 set_current_state(TASK_INTERRUPTIBLE);
1577 snd_pcm_stream_lock_irq(substream);
1578 state = runtime->status->state;
1579 snd_pcm_stream_unlock_irq(substream);
1580 if (state != SNDRV_PCM_STATE_RUNNING) {
1581 set_current_state(TASK_RUNNING);
1582 break;
1583 }
1584 res = schedule_timeout(10 * HZ);
1585 if (signal_pending(current)) {
1586 result = -ERESTARTSYS;
1587 break;
1588 }
1589 if (res == 0) {
1590 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1591 result = -EIO;
1592 break;
1593 }
1594 }
1595 remove_wait_queue(&runtime->sleep, &wait);
1596 return result;
1597}
1598
1599static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1600{
1601 int err = 0;
1602 unsigned int saved_f_flags;
1603 struct snd_pcm_substream *substream;
1604 struct snd_pcm_runtime *runtime;
1605 snd_pcm_format_t format;
1606 unsigned long width;
1607 size_t size;
1608
1609 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1610 if (substream != NULL) {
1611 runtime = substream->runtime;
1612 if (atomic_read(&substream->mmap_count))
1613 goto __direct;
1614 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1615 return err;
1616 format = snd_pcm_oss_format_from(runtime->oss.format);
1617 width = snd_pcm_format_physical_width(format);
1618 mutex_lock(&runtime->oss.params_lock);
1619 if (runtime->oss.buffer_used > 0) {
1620#ifdef OSS_DEBUG
1621 printk(KERN_DEBUG "sync: buffer_used\n");
1622#endif
1623 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1624 snd_pcm_format_set_silence(format,
1625 runtime->oss.buffer + runtime->oss.buffer_used,
1626 size);
1627 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1628 if (err < 0) {
1629 mutex_unlock(&runtime->oss.params_lock);
1630 return err;
1631 }
1632 } else if (runtime->oss.period_ptr > 0) {
1633#ifdef OSS_DEBUG
1634 printk(KERN_DEBUG "sync: period_ptr\n");
1635#endif
1636 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1637 snd_pcm_format_set_silence(format,
1638 runtime->oss.buffer,
1639 size * 8 / width);
1640 err = snd_pcm_oss_sync1(substream, size);
1641 if (err < 0) {
1642 mutex_unlock(&runtime->oss.params_lock);
1643 return err;
1644 }
1645 }
1646 /*
1647 * The ALSA's period might be a bit large than OSS one.
1648 * Fill the remain portion of ALSA period with zeros.
1649 */
1650 size = runtime->control->appl_ptr % runtime->period_size;
1651 if (size > 0) {
1652 size = runtime->period_size - size;
1653 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1654 size = (runtime->frame_bits * size) / 8;
1655 while (size > 0) {
1656 mm_segment_t fs;
1657 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1658 size -= size1;
1659 size1 *= 8;
1660 size1 /= runtime->sample_bits;
1661 snd_pcm_format_set_silence(runtime->format,
1662 runtime->oss.buffer,
1663 size1);
1664 size1 /= runtime->channels; /* frames */
1665 fs = snd_enter_user();
1666 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1667 snd_leave_user(fs);
1668 }
1669 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1670 void __user *buffers[runtime->channels];
1671 memset(buffers, 0, runtime->channels * sizeof(void *));
1672 snd_pcm_lib_writev(substream, buffers, size);
1673 }
1674 }
1675 mutex_unlock(&runtime->oss.params_lock);
1676 /*
1677 * finish sync: drain the buffer
1678 */
1679 __direct:
1680 saved_f_flags = substream->f_flags;
1681 substream->f_flags &= ~O_NONBLOCK;
1682 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1683 substream->f_flags = saved_f_flags;
1684 if (err < 0)
1685 return err;
1686 runtime->oss.prepare = 1;
1687 }
1688
1689 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1690 if (substream != NULL) {
1691 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1692 return err;
1693 runtime = substream->runtime;
1694 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1695 if (err < 0)
1696 return err;
1697 runtime->oss.buffer_used = 0;
1698 runtime->oss.prepare = 1;
1699 }
1700 return 0;
1701}
1702
1703static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1704{
1705 int idx;
1706
1707 for (idx = 1; idx >= 0; --idx) {
1708 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1709 struct snd_pcm_runtime *runtime;
1710 if (substream == NULL)
1711 continue;
1712 runtime = substream->runtime;
1713 if (rate < 1000)
1714 rate = 1000;
1715 else if (rate > 192000)
1716 rate = 192000;
1717 if (runtime->oss.rate != rate) {
1718 runtime->oss.params = 1;
1719 runtime->oss.rate = rate;
1720 }
1721 }
1722 return snd_pcm_oss_get_rate(pcm_oss_file);
1723}
1724
1725static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1726{
1727 struct snd_pcm_substream *substream;
1728 int err;
1729
1730 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1731 return err;
1732 return substream->runtime->oss.rate;
1733}
1734
1735static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1736{
1737 int idx;
1738 if (channels < 1)
1739 channels = 1;
1740 if (channels > 128)
1741 return -EINVAL;
1742 for (idx = 1; idx >= 0; --idx) {
1743 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1744 struct snd_pcm_runtime *runtime;
1745 if (substream == NULL)
1746 continue;
1747 runtime = substream->runtime;
1748 if (runtime->oss.channels != channels) {
1749 runtime->oss.params = 1;
1750 runtime->oss.channels = channels;
1751 }
1752 }
1753 return snd_pcm_oss_get_channels(pcm_oss_file);
1754}
1755
1756static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1757{
1758 struct snd_pcm_substream *substream;
1759 int err;
1760
1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762 return err;
1763 return substream->runtime->oss.channels;
1764}
1765
1766static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1767{
1768 struct snd_pcm_substream *substream;
1769 int err;
1770
1771 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1772 return err;
1773 return substream->runtime->oss.period_bytes;
1774}
1775
1776static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1777{
1778 struct snd_pcm_substream *substream;
1779 int err;
1780 int direct;
1781 struct snd_pcm_hw_params *params;
1782 unsigned int formats = 0;
1783 struct snd_mask format_mask;
1784 int fmt;
1785
1786 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1787 return err;
1788 if (atomic_read(&substream->mmap_count))
1789 direct = 1;
1790 else
1791 direct = substream->oss.setup.direct;
1792 if (!direct)
1793 return AFMT_MU_LAW | AFMT_U8 |
1794 AFMT_S16_LE | AFMT_S16_BE |
1795 AFMT_S8 | AFMT_U16_LE |
1796 AFMT_U16_BE |
1797 AFMT_S32_LE | AFMT_S32_BE |
1798 AFMT_S24_LE | AFMT_S24_BE |
1799 AFMT_S24_PACKED;
1800 params = kmalloc(sizeof(*params), GFP_KERNEL);
1801 if (!params)
1802 return -ENOMEM;
1803 _snd_pcm_hw_params_any(params);
1804 err = snd_pcm_hw_refine(substream, params);
1805 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1806 kfree(params);
1807 if (err < 0)
1808 return err;
1809 for (fmt = 0; fmt < 32; ++fmt) {
1810 if (snd_mask_test(&format_mask, fmt)) {
1811 int f = snd_pcm_oss_format_to(fmt);
1812 if (f >= 0)
1813 formats |= f;
1814 }
1815 }
1816 return formats;
1817}
1818
1819static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1820{
1821 int formats, idx;
1822
1823 if (format != AFMT_QUERY) {
1824 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1825 if (formats < 0)
1826 return formats;
1827 if (!(formats & format))
1828 format = AFMT_U8;
1829 for (idx = 1; idx >= 0; --idx) {
1830 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1831 struct snd_pcm_runtime *runtime;
1832 if (substream == NULL)
1833 continue;
1834 runtime = substream->runtime;
1835 if (runtime->oss.format != format) {
1836 runtime->oss.params = 1;
1837 runtime->oss.format = format;
1838 }
1839 }
1840 }
1841 return snd_pcm_oss_get_format(pcm_oss_file);
1842}
1843
1844static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1845{
1846 struct snd_pcm_substream *substream;
1847 int err;
1848
1849 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1850 return err;
1851 return substream->runtime->oss.format;
1852}
1853
1854static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1855{
1856 struct snd_pcm_runtime *runtime;
1857
1858 if (substream == NULL)
1859 return 0;
1860 runtime = substream->runtime;
1861 if (subdivide == 0) {
1862 subdivide = runtime->oss.subdivision;
1863 if (subdivide == 0)
1864 subdivide = 1;
1865 return subdivide;
1866 }
1867 if (runtime->oss.subdivision || runtime->oss.fragshift)
1868 return -EINVAL;
1869 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1870 subdivide != 8 && subdivide != 16)
1871 return -EINVAL;
1872 runtime->oss.subdivision = subdivide;
1873 runtime->oss.params = 1;
1874 return subdivide;
1875}
1876
1877static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1878{
1879 int err = -EINVAL, idx;
1880
1881 for (idx = 1; idx >= 0; --idx) {
1882 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1883 if (substream == NULL)
1884 continue;
1885 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1886 return err;
1887 }
1888 return err;
1889}
1890
1891static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1892{
1893 struct snd_pcm_runtime *runtime;
1894
1895 if (substream == NULL)
1896 return 0;
1897 runtime = substream->runtime;
1898 if (runtime->oss.subdivision || runtime->oss.fragshift)
1899 return -EINVAL;
1900 runtime->oss.fragshift = val & 0xffff;
1901 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1902 if (runtime->oss.fragshift < 4) /* < 16 */
1903 runtime->oss.fragshift = 4;
1904 if (runtime->oss.maxfrags < 2)
1905 runtime->oss.maxfrags = 2;
1906 runtime->oss.params = 1;
1907 return 0;
1908}
1909
1910static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1911{
1912 int err = -EINVAL, idx;
1913
1914 for (idx = 1; idx >= 0; --idx) {
1915 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1916 if (substream == NULL)
1917 continue;
1918 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1919 return err;
1920 }
1921 return err;
1922}
1923
1924static int snd_pcm_oss_nonblock(struct file * file)
1925{
1926 spin_lock(&file->f_lock);
1927 file->f_flags |= O_NONBLOCK;
1928 spin_unlock(&file->f_lock);
1929 return 0;
1930}
1931
1932static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1933{
1934
1935 if (substream == NULL) {
1936 res &= ~DSP_CAP_DUPLEX;
1937 return res;
1938 }
1939#ifdef DSP_CAP_MULTI
1940 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1941 if (substream->pstr->substream_count > 1)
1942 res |= DSP_CAP_MULTI;
1943#endif
1944 /* DSP_CAP_REALTIME is set all times: */
1945 /* all ALSA drivers can return actual pointer in ring buffer */
1946#if defined(DSP_CAP_REALTIME) && 0
1947 {
1948 struct snd_pcm_runtime *runtime = substream->runtime;
1949 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1950 res &= ~DSP_CAP_REALTIME;
1951 }
1952#endif
1953 return res;
1954}
1955
1956static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1957{
1958 int result, idx;
1959
1960 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1961 for (idx = 0; idx < 2; idx++) {
1962 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1963 result = snd_pcm_oss_get_caps1(substream, result);
1964 }
1965 result |= 0x0001; /* revision - same as SB AWE 64 */
1966 return result;
1967}
1968
1969static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1970 snd_pcm_uframes_t hw_ptr)
1971{
1972 struct snd_pcm_runtime *runtime = substream->runtime;
1973 snd_pcm_uframes_t appl_ptr;
1974 appl_ptr = hw_ptr + runtime->buffer_size;
1975 appl_ptr %= runtime->boundary;
1976 runtime->control->appl_ptr = appl_ptr;
1977}
1978
1979static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1980{
1981 struct snd_pcm_runtime *runtime;
1982 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1983 int err, cmd;
1984
1985#ifdef OSS_DEBUG
1986 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1987#endif
1988
1989 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1990 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1991
1992 if (psubstream) {
1993 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1994 return err;
1995 }
1996 if (csubstream) {
1997 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1998 return err;
1999 }
2000 if (psubstream) {
2001 runtime = psubstream->runtime;
2002 if (trigger & PCM_ENABLE_OUTPUT) {
2003 if (runtime->oss.trigger)
2004 goto _skip1;
2005 if (atomic_read(&psubstream->mmap_count))
2006 snd_pcm_oss_simulate_fill(psubstream,
2007 get_hw_ptr_period(runtime));
2008 runtime->oss.trigger = 1;
2009 runtime->start_threshold = 1;
2010 cmd = SNDRV_PCM_IOCTL_START;
2011 } else {
2012 if (!runtime->oss.trigger)
2013 goto _skip1;
2014 runtime->oss.trigger = 0;
2015 runtime->start_threshold = runtime->boundary;
2016 cmd = SNDRV_PCM_IOCTL_DROP;
2017 runtime->oss.prepare = 1;
2018 }
2019 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2020 if (err < 0)
2021 return err;
2022 }
2023 _skip1:
2024 if (csubstream) {
2025 runtime = csubstream->runtime;
2026 if (trigger & PCM_ENABLE_INPUT) {
2027 if (runtime->oss.trigger)
2028 goto _skip2;
2029 runtime->oss.trigger = 1;
2030 runtime->start_threshold = 1;
2031 cmd = SNDRV_PCM_IOCTL_START;
2032 } else {
2033 if (!runtime->oss.trigger)
2034 goto _skip2;
2035 runtime->oss.trigger = 0;
2036 runtime->start_threshold = runtime->boundary;
2037 cmd = SNDRV_PCM_IOCTL_DROP;
2038 runtime->oss.prepare = 1;
2039 }
2040 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2041 if (err < 0)
2042 return err;
2043 }
2044 _skip2:
2045 return 0;
2046}
2047
2048static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2049{
2050 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2051 int result = 0;
2052
2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2055 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2056 result |= PCM_ENABLE_OUTPUT;
2057 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2058 result |= PCM_ENABLE_INPUT;
2059 return result;
2060}
2061
2062static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2063{
2064 struct snd_pcm_substream *substream;
2065 struct snd_pcm_runtime *runtime;
2066 snd_pcm_sframes_t delay;
2067 int err;
2068
2069 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2070 if (substream == NULL)
2071 return -EINVAL;
2072 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2073 return err;
2074 runtime = substream->runtime;
2075 if (runtime->oss.params || runtime->oss.prepare)
2076 return 0;
2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2078 if (err == -EPIPE)
2079 delay = 0; /* hack for broken OSS applications */
2080 else if (err < 0)
2081 return err;
2082 return snd_pcm_oss_bytes(substream, delay);
2083}
2084
2085static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2086{
2087 struct snd_pcm_substream *substream;
2088 struct snd_pcm_runtime *runtime;
2089 snd_pcm_sframes_t delay;
2090 int fixup;
2091 struct count_info info;
2092 int err;
2093
2094 if (_info == NULL)
2095 return -EFAULT;
2096 substream = pcm_oss_file->streams[stream];
2097 if (substream == NULL)
2098 return -EINVAL;
2099 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2100 return err;
2101 runtime = substream->runtime;
2102 if (runtime->oss.params || runtime->oss.prepare) {
2103 memset(&info, 0, sizeof(info));
2104 if (copy_to_user(_info, &info, sizeof(info)))
2105 return -EFAULT;
2106 return 0;
2107 }
2108 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2110 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2111 err = 0;
2112 delay = 0;
2113 fixup = 0;
2114 } else {
2115 fixup = runtime->oss.buffer_used;
2116 }
2117 } else {
2118 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2119 fixup = -runtime->oss.buffer_used;
2120 }
2121 if (err < 0)
2122 return err;
2123 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2124 if (atomic_read(&substream->mmap_count)) {
2125 snd_pcm_sframes_t n;
2126 delay = get_hw_ptr_period(runtime);
2127 n = delay - runtime->oss.prev_hw_ptr_period;
2128 if (n < 0)
2129 n += runtime->boundary;
2130 info.blocks = n / runtime->period_size;
2131 runtime->oss.prev_hw_ptr_period = delay;
2132 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2133 snd_pcm_oss_simulate_fill(substream, delay);
2134 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2135 } else {
2136 delay = snd_pcm_oss_bytes(substream, delay);
2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2138 if (substream->oss.setup.buggyptr)
2139 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2140 else
2141 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2142 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2143 } else {
2144 delay += fixup;
2145 info.blocks = delay / runtime->oss.period_bytes;
2146 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2147 }
2148 }
2149 if (copy_to_user(_info, &info, sizeof(info)))
2150 return -EFAULT;
2151 return 0;
2152}
2153
2154static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2155{
2156 struct snd_pcm_substream *substream;
2157 struct snd_pcm_runtime *runtime;
2158 snd_pcm_sframes_t avail;
2159 int fixup;
2160 struct audio_buf_info info;
2161 int err;
2162
2163 if (_info == NULL)
2164 return -EFAULT;
2165 substream = pcm_oss_file->streams[stream];
2166 if (substream == NULL)
2167 return -EINVAL;
2168 runtime = substream->runtime;
2169
2170 if (runtime->oss.params &&
2171 (err = snd_pcm_oss_change_params(substream)) < 0)
2172 return err;
2173
2174 info.fragsize = runtime->oss.period_bytes;
2175 info.fragstotal = runtime->periods;
2176 if (runtime->oss.prepare) {
2177 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2178 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2179 info.fragments = runtime->oss.periods;
2180 } else {
2181 info.bytes = 0;
2182 info.fragments = 0;
2183 }
2184 } else {
2185 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2187 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2188 avail = runtime->buffer_size;
2189 err = 0;
2190 fixup = 0;
2191 } else {
2192 avail = runtime->buffer_size - avail;
2193 fixup = -runtime->oss.buffer_used;
2194 }
2195 } else {
2196 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2197 fixup = runtime->oss.buffer_used;
2198 }
2199 if (err < 0)
2200 return err;
2201 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2202 info.fragments = info.bytes / runtime->oss.period_bytes;
2203 }
2204
2205#ifdef OSS_DEBUG
2206 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2207 "fragstotal = %i, fragsize = %i\n",
2208 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2209#endif
2210 if (copy_to_user(_info, &info, sizeof(info)))
2211 return -EFAULT;
2212 return 0;
2213}
2214
2215static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2216{
2217 // it won't be probably implemented
2218 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2219 return -EINVAL;
2220}
2221
2222static const char *strip_task_path(const char *path)
2223{
2224 const char *ptr, *ptrl = NULL;
2225 for (ptr = path; *ptr; ptr++) {
2226 if (*ptr == '/')
2227 ptrl = ptr + 1;
2228 }
2229 return ptrl;
2230}
2231
2232static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2233 const char *task_name,
2234 struct snd_pcm_oss_setup *rsetup)
2235{
2236 struct snd_pcm_oss_setup *setup;
2237
2238 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2239 do {
2240 for (setup = pcm->streams[stream].oss.setup_list; setup;
2241 setup = setup->next) {
2242 if (!strcmp(setup->task_name, task_name))
2243 goto out;
2244 }
2245 } while ((task_name = strip_task_path(task_name)) != NULL);
2246 out:
2247 if (setup)
2248 *rsetup = *setup;
2249 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2250}
2251
2252static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2253{
2254 struct snd_pcm_runtime *runtime;
2255 runtime = substream->runtime;
2256 vfree(runtime->oss.buffer);
2257 runtime->oss.buffer = NULL;
2258#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2259 snd_pcm_oss_plugin_clear(substream);
2260#endif
2261 substream->oss.oss = 0;
2262}
2263
2264static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2265 struct snd_pcm_oss_setup *setup,
2266 int minor)
2267{
2268 struct snd_pcm_runtime *runtime;
2269
2270 substream->oss.oss = 1;
2271 substream->oss.setup = *setup;
2272 if (setup->nonblock)
2273 substream->f_flags |= O_NONBLOCK;
2274 else if (setup->block)
2275 substream->f_flags &= ~O_NONBLOCK;
2276 runtime = substream->runtime;
2277 runtime->oss.params = 1;
2278 runtime->oss.trigger = 1;
2279 runtime->oss.rate = 8000;
2280 mutex_init(&runtime->oss.params_lock);
2281 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2282 case SNDRV_MINOR_OSS_PCM_8:
2283 runtime->oss.format = AFMT_U8;
2284 break;
2285 case SNDRV_MINOR_OSS_PCM_16:
2286 runtime->oss.format = AFMT_S16_LE;
2287 break;
2288 default:
2289 runtime->oss.format = AFMT_MU_LAW;
2290 }
2291 runtime->oss.channels = 1;
2292 runtime->oss.fragshift = 0;
2293 runtime->oss.maxfrags = 0;
2294 runtime->oss.subdivision = 0;
2295 substream->pcm_release = snd_pcm_oss_release_substream;
2296}
2297
2298static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2299{
2300 int cidx;
2301 if (!pcm_oss_file)
2302 return 0;
2303 for (cidx = 0; cidx < 2; ++cidx) {
2304 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2305 if (substream)
2306 snd_pcm_release_substream(substream);
2307 }
2308 kfree(pcm_oss_file);
2309 return 0;
2310}
2311
2312static int snd_pcm_oss_open_file(struct file *file,
2313 struct snd_pcm *pcm,
2314 struct snd_pcm_oss_file **rpcm_oss_file,
2315 int minor,
2316 struct snd_pcm_oss_setup *setup)
2317{
2318 int idx, err;
2319 struct snd_pcm_oss_file *pcm_oss_file;
2320 struct snd_pcm_substream *substream;
2321 fmode_t f_mode = file->f_mode;
2322
2323 if (rpcm_oss_file)
2324 *rpcm_oss_file = NULL;
2325
2326 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2327 if (pcm_oss_file == NULL)
2328 return -ENOMEM;
2329
2330 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2331 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2332 f_mode = FMODE_WRITE;
2333
2334 file->f_flags &= ~O_APPEND;
2335 for (idx = 0; idx < 2; idx++) {
2336 if (setup[idx].disable)
2337 continue;
2338 if (! pcm->streams[idx].substream_count)
2339 continue; /* no matching substream */
2340 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2341 if (! (f_mode & FMODE_WRITE))
2342 continue;
2343 } else {
2344 if (! (f_mode & FMODE_READ))
2345 continue;
2346 }
2347 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2348 if (err < 0) {
2349 snd_pcm_oss_release_file(pcm_oss_file);
2350 return err;
2351 }
2352
2353 pcm_oss_file->streams[idx] = substream;
2354 substream->file = pcm_oss_file;
2355 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2356 }
2357
2358 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2359 snd_pcm_oss_release_file(pcm_oss_file);
2360 return -EINVAL;
2361 }
2362
2363 file->private_data = pcm_oss_file;
2364 if (rpcm_oss_file)
2365 *rpcm_oss_file = pcm_oss_file;
2366 return 0;
2367}
2368
2369
2370static int snd_task_name(struct task_struct *task, char *name, size_t size)
2371{
2372 unsigned int idx;
2373
2374 if (snd_BUG_ON(!task || !name || size < 2))
2375 return -EINVAL;
2376 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2377 name[idx] = task->comm[idx];
2378 name[idx] = '\0';
2379 return 0;
2380}
2381
2382static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2383{
2384 int err;
2385 char task_name[32];
2386 struct snd_pcm *pcm;
2387 struct snd_pcm_oss_file *pcm_oss_file;
2388 struct snd_pcm_oss_setup setup[2];
2389 int nonblock;
2390 wait_queue_t wait;
2391
2392 err = nonseekable_open(inode, file);
2393 if (err < 0)
2394 return err;
2395
2396 pcm = snd_lookup_oss_minor_data(iminor(inode),
2397 SNDRV_OSS_DEVICE_TYPE_PCM);
2398 if (pcm == NULL) {
2399 err = -ENODEV;
2400 goto __error1;
2401 }
2402 err = snd_card_file_add(pcm->card, file);
2403 if (err < 0)
2404 goto __error1;
2405 if (!try_module_get(pcm->card->module)) {
2406 err = -EFAULT;
2407 goto __error2;
2408 }
2409 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2410 err = -EFAULT;
2411 goto __error;
2412 }
2413 memset(setup, 0, sizeof(setup));
2414 if (file->f_mode & FMODE_WRITE)
2415 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2416 task_name, &setup[0]);
2417 if (file->f_mode & FMODE_READ)
2418 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2419 task_name, &setup[1]);
2420
2421 nonblock = !!(file->f_flags & O_NONBLOCK);
2422 if (!nonblock)
2423 nonblock = nonblock_open;
2424
2425 init_waitqueue_entry(&wait, current);
2426 add_wait_queue(&pcm->open_wait, &wait);
2427 mutex_lock(&pcm->open_mutex);
2428 while (1) {
2429 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2430 iminor(inode), setup);
2431 if (err >= 0)
2432 break;
2433 if (err == -EAGAIN) {
2434 if (nonblock) {
2435 err = -EBUSY;
2436 break;
2437 }
2438 } else
2439 break;
2440 set_current_state(TASK_INTERRUPTIBLE);
2441 mutex_unlock(&pcm->open_mutex);
2442 schedule();
2443 mutex_lock(&pcm->open_mutex);
2444 if (signal_pending(current)) {
2445 err = -ERESTARTSYS;
2446 break;
2447 }
2448 }
2449 remove_wait_queue(&pcm->open_wait, &wait);
2450 mutex_unlock(&pcm->open_mutex);
2451 if (err < 0)
2452 goto __error;
2453 return err;
2454
2455 __error:
2456 module_put(pcm->card->module);
2457 __error2:
2458 snd_card_file_remove(pcm->card, file);
2459 __error1:
2460 return err;
2461}
2462
2463static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2464{
2465 struct snd_pcm *pcm;
2466 struct snd_pcm_substream *substream;
2467 struct snd_pcm_oss_file *pcm_oss_file;
2468
2469 pcm_oss_file = file->private_data;
2470 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2471 if (substream == NULL)
2472 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2473 if (snd_BUG_ON(!substream))
2474 return -ENXIO;
2475 pcm = substream->pcm;
2476 if (!pcm->card->shutdown)
2477 snd_pcm_oss_sync(pcm_oss_file);
2478 mutex_lock(&pcm->open_mutex);
2479 snd_pcm_oss_release_file(pcm_oss_file);
2480 mutex_unlock(&pcm->open_mutex);
2481 wake_up(&pcm->open_wait);
2482 module_put(pcm->card->module);
2483 snd_card_file_remove(pcm->card, file);
2484 return 0;
2485}
2486
2487static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2488{
2489 struct snd_pcm_oss_file *pcm_oss_file;
2490 int __user *p = (int __user *)arg;
2491 int res;
2492
2493 pcm_oss_file = file->private_data;
2494 if (cmd == OSS_GETVERSION)
2495 return put_user(SNDRV_OSS_VERSION, p);
2496 if (cmd == OSS_ALSAEMULVER)
2497 return put_user(1, p);
2498#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2499 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2500 struct snd_pcm_substream *substream;
2501 int idx;
2502 for (idx = 0; idx < 2; ++idx) {
2503 substream = pcm_oss_file->streams[idx];
2504 if (substream != NULL)
2505 break;
2506 }
2507 if (snd_BUG_ON(idx >= 2))
2508 return -ENXIO;
2509 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2510 }
2511#endif
2512 if (((cmd >> 8) & 0xff) != 'P')
2513 return -EINVAL;
2514#ifdef OSS_DEBUG
2515 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2516#endif
2517 switch (cmd) {
2518 case SNDCTL_DSP_RESET:
2519 return snd_pcm_oss_reset(pcm_oss_file);
2520 case SNDCTL_DSP_SYNC:
2521 return snd_pcm_oss_sync(pcm_oss_file);
2522 case SNDCTL_DSP_SPEED:
2523 if (get_user(res, p))
2524 return -EFAULT;
2525 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2526 return res;
2527 return put_user(res, p);
2528 case SOUND_PCM_READ_RATE:
2529 res = snd_pcm_oss_get_rate(pcm_oss_file);
2530 if (res < 0)
2531 return res;
2532 return put_user(res, p);
2533 case SNDCTL_DSP_STEREO:
2534 if (get_user(res, p))
2535 return -EFAULT;
2536 res = res > 0 ? 2 : 1;
2537 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2538 return res;
2539 return put_user(--res, p);
2540 case SNDCTL_DSP_GETBLKSIZE:
2541 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2542 if (res < 0)
2543 return res;
2544 return put_user(res, p);
2545 case SNDCTL_DSP_SETFMT:
2546 if (get_user(res, p))
2547 return -EFAULT;
2548 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2549 if (res < 0)
2550 return res;
2551 return put_user(res, p);
2552 case SOUND_PCM_READ_BITS:
2553 res = snd_pcm_oss_get_format(pcm_oss_file);
2554 if (res < 0)
2555 return res;
2556 return put_user(res, p);
2557 case SNDCTL_DSP_CHANNELS:
2558 if (get_user(res, p))
2559 return -EFAULT;
2560 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2561 if (res < 0)
2562 return res;
2563 return put_user(res, p);
2564 case SOUND_PCM_READ_CHANNELS:
2565 res = snd_pcm_oss_get_channels(pcm_oss_file);
2566 if (res < 0)
2567 return res;
2568 return put_user(res, p);
2569 case SOUND_PCM_WRITE_FILTER:
2570 case SOUND_PCM_READ_FILTER:
2571 return -EIO;
2572 case SNDCTL_DSP_POST:
2573 return snd_pcm_oss_post(pcm_oss_file);
2574 case SNDCTL_DSP_SUBDIVIDE:
2575 if (get_user(res, p))
2576 return -EFAULT;
2577 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2578 if (res < 0)
2579 return res;
2580 return put_user(res, p);
2581 case SNDCTL_DSP_SETFRAGMENT:
2582 if (get_user(res, p))
2583 return -EFAULT;
2584 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2585 case SNDCTL_DSP_GETFMTS:
2586 res = snd_pcm_oss_get_formats(pcm_oss_file);
2587 if (res < 0)
2588 return res;
2589 return put_user(res, p);
2590 case SNDCTL_DSP_GETOSPACE:
2591 case SNDCTL_DSP_GETISPACE:
2592 return snd_pcm_oss_get_space(pcm_oss_file,
2593 cmd == SNDCTL_DSP_GETISPACE ?
2594 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2595 (struct audio_buf_info __user *) arg);
2596 case SNDCTL_DSP_NONBLOCK:
2597 return snd_pcm_oss_nonblock(file);
2598 case SNDCTL_DSP_GETCAPS:
2599 res = snd_pcm_oss_get_caps(pcm_oss_file);
2600 if (res < 0)
2601 return res;
2602 return put_user(res, p);
2603 case SNDCTL_DSP_GETTRIGGER:
2604 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2605 if (res < 0)
2606 return res;
2607 return put_user(res, p);
2608 case SNDCTL_DSP_SETTRIGGER:
2609 if (get_user(res, p))
2610 return -EFAULT;
2611 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2612 case SNDCTL_DSP_GETIPTR:
2613 case SNDCTL_DSP_GETOPTR:
2614 return snd_pcm_oss_get_ptr(pcm_oss_file,
2615 cmd == SNDCTL_DSP_GETIPTR ?
2616 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2617 (struct count_info __user *) arg);
2618 case SNDCTL_DSP_MAPINBUF:
2619 case SNDCTL_DSP_MAPOUTBUF:
2620 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2621 cmd == SNDCTL_DSP_MAPINBUF ?
2622 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2623 (struct buffmem_desc __user *) arg);
2624 case SNDCTL_DSP_SETSYNCRO:
2625 /* stop DMA now.. */
2626 return 0;
2627 case SNDCTL_DSP_SETDUPLEX:
2628 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2629 return 0;
2630 return -EIO;
2631 case SNDCTL_DSP_GETODELAY:
2632 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2633 if (res < 0) {
2634 /* it's for sure, some broken apps don't check for error codes */
2635 put_user(0, p);
2636 return res;
2637 }
2638 return put_user(res, p);
2639 case SNDCTL_DSP_PROFILE:
2640 return 0; /* silently ignore */
2641 default:
2642 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2643 }
2644 return -EINVAL;
2645}
2646
2647#ifdef CONFIG_COMPAT
2648/* all compatible */
2649#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2650#else
2651#define snd_pcm_oss_ioctl_compat NULL
2652#endif
2653
2654static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2655{
2656 struct snd_pcm_oss_file *pcm_oss_file;
2657 struct snd_pcm_substream *substream;
2658
2659 pcm_oss_file = file->private_data;
2660 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2661 if (substream == NULL)
2662 return -ENXIO;
2663 substream->f_flags = file->f_flags & O_NONBLOCK;
2664#ifndef OSS_DEBUG
2665 return snd_pcm_oss_read1(substream, buf, count);
2666#else
2667 {
2668 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2669 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2670 "(returned %li bytes)\n", (long)count, (long)res);
2671 return res;
2672 }
2673#endif
2674}
2675
2676static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2677{
2678 struct snd_pcm_oss_file *pcm_oss_file;
2679 struct snd_pcm_substream *substream;
2680 long result;
2681
2682 pcm_oss_file = file->private_data;
2683 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2684 if (substream == NULL)
2685 return -ENXIO;
2686 substream->f_flags = file->f_flags & O_NONBLOCK;
2687 result = snd_pcm_oss_write1(substream, buf, count);
2688#ifdef OSS_DEBUG
2689 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2690 (long)count, (long)result);
2691#endif
2692 return result;
2693}
2694
2695static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2696{
2697 struct snd_pcm_runtime *runtime = substream->runtime;
2698 if (atomic_read(&substream->mmap_count))
2699 return runtime->oss.prev_hw_ptr_period !=
2700 get_hw_ptr_period(runtime);
2701 else
2702 return snd_pcm_playback_avail(runtime) >=
2703 runtime->oss.period_frames;
2704}
2705
2706static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2707{
2708 struct snd_pcm_runtime *runtime = substream->runtime;
2709 if (atomic_read(&substream->mmap_count))
2710 return runtime->oss.prev_hw_ptr_period !=
2711 get_hw_ptr_period(runtime);
2712 else
2713 return snd_pcm_capture_avail(runtime) >=
2714 runtime->oss.period_frames;
2715}
2716
2717static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2718{
2719 struct snd_pcm_oss_file *pcm_oss_file;
2720 unsigned int mask;
2721 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2722
2723 pcm_oss_file = file->private_data;
2724
2725 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2726 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2727
2728 mask = 0;
2729 if (psubstream != NULL) {
2730 struct snd_pcm_runtime *runtime = psubstream->runtime;
2731 poll_wait(file, &runtime->sleep, wait);
2732 snd_pcm_stream_lock_irq(psubstream);
2733 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2734 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2735 snd_pcm_oss_playback_ready(psubstream)))
2736 mask |= POLLOUT | POLLWRNORM;
2737 snd_pcm_stream_unlock_irq(psubstream);
2738 }
2739 if (csubstream != NULL) {
2740 struct snd_pcm_runtime *runtime = csubstream->runtime;
2741 snd_pcm_state_t ostate;
2742 poll_wait(file, &runtime->sleep, wait);
2743 snd_pcm_stream_lock_irq(csubstream);
2744 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2745 snd_pcm_oss_capture_ready(csubstream))
2746 mask |= POLLIN | POLLRDNORM;
2747 snd_pcm_stream_unlock_irq(csubstream);
2748 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2749 struct snd_pcm_oss_file ofile;
2750 memset(&ofile, 0, sizeof(ofile));
2751 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2752 runtime->oss.trigger = 0;
2753 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2754 }
2755 }
2756
2757 return mask;
2758}
2759
2760static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2761{
2762 struct snd_pcm_oss_file *pcm_oss_file;
2763 struct snd_pcm_substream *substream = NULL;
2764 struct snd_pcm_runtime *runtime;
2765 int err;
2766
2767#ifdef OSS_DEBUG
2768 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2769#endif
2770 pcm_oss_file = file->private_data;
2771 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2772 case VM_READ | VM_WRITE:
2773 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2774 if (substream)
2775 break;
2776 /* Fall through */
2777 case VM_READ:
2778 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2779 break;
2780 case VM_WRITE:
2781 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2782 break;
2783 default:
2784 return -EINVAL;
2785 }
2786 /* set VM_READ access as well to fix memset() routines that do
2787 reads before writes (to improve performance) */
2788 area->vm_flags |= VM_READ;
2789 if (substream == NULL)
2790 return -ENXIO;
2791 runtime = substream->runtime;
2792 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2793 return -EIO;
2794 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2795 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2796 else
2797 return -EIO;
2798
2799 if (runtime->oss.params) {
2800 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2801 return err;
2802 }
2803#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2804 if (runtime->oss.plugin_first != NULL)
2805 return -EIO;
2806#endif
2807
2808 if (area->vm_pgoff != 0)
2809 return -EINVAL;
2810
2811 err = snd_pcm_mmap_data(substream, file, area);
2812 if (err < 0)
2813 return err;
2814 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2815 runtime->silence_threshold = 0;
2816 runtime->silence_size = 0;
2817#ifdef OSS_DEBUG
2818 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2819 runtime->oss.mmap_bytes);
2820#endif
2821 /* In mmap mode we never stop */
2822 runtime->stop_threshold = runtime->boundary;
2823
2824 return 0;
2825}
2826
2827#ifdef CONFIG_SND_VERBOSE_PROCFS
2828/*
2829 * /proc interface
2830 */
2831
2832static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2833 struct snd_info_buffer *buffer)
2834{
2835 struct snd_pcm_str *pstr = entry->private_data;
2836 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2837 mutex_lock(&pstr->oss.setup_mutex);
2838 while (setup) {
2839 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2840 setup->task_name,
2841 setup->periods,
2842 setup->period_size,
2843 setup->disable ? " disable" : "",
2844 setup->direct ? " direct" : "",
2845 setup->block ? " block" : "",
2846 setup->nonblock ? " non-block" : "",
2847 setup->partialfrag ? " partial-frag" : "",
2848 setup->nosilence ? " no-silence" : "");
2849 setup = setup->next;
2850 }
2851 mutex_unlock(&pstr->oss.setup_mutex);
2852}
2853
2854static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2855{
2856 struct snd_pcm_oss_setup *setup, *setupn;
2857
2858 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2859 setup; setup = setupn) {
2860 setupn = setup->next;
2861 kfree(setup->task_name);
2862 kfree(setup);
2863 }
2864 pstr->oss.setup_list = NULL;
2865}
2866
2867static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2868 struct snd_info_buffer *buffer)
2869{
2870 struct snd_pcm_str *pstr = entry->private_data;
2871 char line[128], str[32], task_name[32];
2872 const char *ptr;
2873 int idx1;
2874 struct snd_pcm_oss_setup *setup, *setup1, template;
2875
2876 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2877 mutex_lock(&pstr->oss.setup_mutex);
2878 memset(&template, 0, sizeof(template));
2879 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2880 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2881 snd_pcm_oss_proc_free_setup_list(pstr);
2882 mutex_unlock(&pstr->oss.setup_mutex);
2883 continue;
2884 }
2885 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2886 if (!strcmp(setup->task_name, task_name)) {
2887 template = *setup;
2888 break;
2889 }
2890 }
2891 ptr = snd_info_get_str(str, ptr, sizeof(str));
2892 template.periods = simple_strtoul(str, NULL, 10);
2893 ptr = snd_info_get_str(str, ptr, sizeof(str));
2894 template.period_size = simple_strtoul(str, NULL, 10);
2895 for (idx1 = 31; idx1 >= 0; idx1--)
2896 if (template.period_size & (1 << idx1))
2897 break;
2898 for (idx1--; idx1 >= 0; idx1--)
2899 template.period_size &= ~(1 << idx1);
2900 do {
2901 ptr = snd_info_get_str(str, ptr, sizeof(str));
2902 if (!strcmp(str, "disable")) {
2903 template.disable = 1;
2904 } else if (!strcmp(str, "direct")) {
2905 template.direct = 1;
2906 } else if (!strcmp(str, "block")) {
2907 template.block = 1;
2908 } else if (!strcmp(str, "non-block")) {
2909 template.nonblock = 1;
2910 } else if (!strcmp(str, "partial-frag")) {
2911 template.partialfrag = 1;
2912 } else if (!strcmp(str, "no-silence")) {
2913 template.nosilence = 1;
2914 } else if (!strcmp(str, "buggy-ptr")) {
2915 template.buggyptr = 1;
2916 }
2917 } while (*str);
2918 if (setup == NULL) {
2919 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2920 if (! setup) {
2921 buffer->error = -ENOMEM;
2922 mutex_unlock(&pstr->oss.setup_mutex);
2923 return;
2924 }
2925 if (pstr->oss.setup_list == NULL)
2926 pstr->oss.setup_list = setup;
2927 else {
2928 for (setup1 = pstr->oss.setup_list;
2929 setup1->next; setup1 = setup1->next);
2930 setup1->next = setup;
2931 }
2932 template.task_name = kstrdup(task_name, GFP_KERNEL);
2933 if (! template.task_name) {
2934 kfree(setup);
2935 buffer->error = -ENOMEM;
2936 mutex_unlock(&pstr->oss.setup_mutex);
2937 return;
2938 }
2939 }
2940 *setup = template;
2941 mutex_unlock(&pstr->oss.setup_mutex);
2942 }
2943}
2944
2945static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2946{
2947 int stream;
2948 for (stream = 0; stream < 2; ++stream) {
2949 struct snd_info_entry *entry;
2950 struct snd_pcm_str *pstr = &pcm->streams[stream];
2951 if (pstr->substream_count == 0)
2952 continue;
2953 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2954 entry->content = SNDRV_INFO_CONTENT_TEXT;
2955 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2956 entry->c.text.read = snd_pcm_oss_proc_read;
2957 entry->c.text.write = snd_pcm_oss_proc_write;
2958 entry->private_data = pstr;
2959 if (snd_info_register(entry) < 0) {
2960 snd_info_free_entry(entry);
2961 entry = NULL;
2962 }
2963 }
2964 pstr->oss.proc_entry = entry;
2965 }
2966}
2967
2968static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2969{
2970 int stream;
2971 for (stream = 0; stream < 2; ++stream) {
2972 struct snd_pcm_str *pstr = &pcm->streams[stream];
2973 snd_info_free_entry(pstr->oss.proc_entry);
2974 pstr->oss.proc_entry = NULL;
2975 snd_pcm_oss_proc_free_setup_list(pstr);
2976 }
2977}
2978#else /* !CONFIG_SND_VERBOSE_PROCFS */
2979#define snd_pcm_oss_proc_init(pcm)
2980#define snd_pcm_oss_proc_done(pcm)
2981#endif /* CONFIG_SND_VERBOSE_PROCFS */
2982
2983/*
2984 * ENTRY functions
2985 */
2986
2987static const struct file_operations snd_pcm_oss_f_reg =
2988{
2989 .owner = THIS_MODULE,
2990 .read = snd_pcm_oss_read,
2991 .write = snd_pcm_oss_write,
2992 .open = snd_pcm_oss_open,
2993 .release = snd_pcm_oss_release,
2994 .llseek = no_llseek,
2995 .poll = snd_pcm_oss_poll,
2996 .unlocked_ioctl = snd_pcm_oss_ioctl,
2997 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2998 .mmap = snd_pcm_oss_mmap,
2999};
3000
3001static void register_oss_dsp(struct snd_pcm *pcm, int index)
3002{
3003 char name[128];
3004 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3005 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3006 pcm->card, index, &snd_pcm_oss_f_reg,
3007 pcm, name) < 0) {
3008 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3009 pcm->card->number, pcm->device);
3010 }
3011}
3012
3013static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3014{
3015 pcm->oss.reg = 0;
3016 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3017 char name[128];
3018 int duplex;
3019 register_oss_dsp(pcm, 0);
3020 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3021 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3022 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3023 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3024#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3025 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3026 pcm->card->number,
3027 name);
3028#endif
3029 pcm->oss.reg++;
3030 pcm->oss.reg_mask |= 1;
3031 }
3032 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3033 register_oss_dsp(pcm, 1);
3034 pcm->oss.reg++;
3035 pcm->oss.reg_mask |= 2;
3036 }
3037
3038 if (pcm->oss.reg)
3039 snd_pcm_oss_proc_init(pcm);
3040
3041 return 0;
3042}
3043
3044static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3045{
3046 if (pcm->oss.reg) {
3047 if (pcm->oss.reg_mask & 1) {
3048 pcm->oss.reg_mask &= ~1;
3049 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3050 pcm->card, 0);
3051 }
3052 if (pcm->oss.reg_mask & 2) {
3053 pcm->oss.reg_mask &= ~2;
3054 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3055 pcm->card, 1);
3056 }
3057 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3058#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3059 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3060#endif
3061 }
3062 pcm->oss.reg = 0;
3063 }
3064 return 0;
3065}
3066
3067static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3068{
3069 snd_pcm_oss_disconnect_minor(pcm);
3070 snd_pcm_oss_proc_done(pcm);
3071 return 0;
3072}
3073
3074static struct snd_pcm_notify snd_pcm_oss_notify =
3075{
3076 .n_register = snd_pcm_oss_register_minor,
3077 .n_disconnect = snd_pcm_oss_disconnect_minor,
3078 .n_unregister = snd_pcm_oss_unregister_minor,
3079};
3080
3081static int __init alsa_pcm_oss_init(void)
3082{
3083 int i;
3084 int err;
3085
3086 /* check device map table */
3087 for (i = 0; i < SNDRV_CARDS; i++) {
3088 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3089 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3090 i, dsp_map[i]);
3091 dsp_map[i] = 0;
3092 }
3093 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3094 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3095 i, adsp_map[i]);
3096 adsp_map[i] = 1;
3097 }
3098 }
3099 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3100 return err;
3101 return 0;
3102}
3103
3104static void __exit alsa_pcm_oss_exit(void)
3105{
3106 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3107}
3108
3109module_init(alsa_pcm_oss_init)
3110module_exit(alsa_pcm_oss_exit)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Digital Audio (PCM) abstract layer / OSS compatible
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 */
6
7#if 0
8#define PLUGIN_DEBUG
9#endif
10#if 0
11#define OSS_DEBUG
12#endif
13
14#include <linux/init.h>
15#include <linux/slab.h>
16#include <linux/sched/signal.h>
17#include <linux/time.h>
18#include <linux/vmalloc.h>
19#include <linux/module.h>
20#include <linux/math64.h>
21#include <linux/string.h>
22#include <linux/compat.h>
23#include <sound/core.h>
24#include <sound/minors.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include "pcm_plugin.h"
28#include <sound/info.h>
29#include <linux/soundcard.h>
30#include <sound/initval.h>
31#include <sound/mixer_oss.h>
32
33#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
34
35static int dsp_map[SNDRV_CARDS];
36static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
37static bool nonblock_open = 1;
38
39MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
40MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
41MODULE_LICENSE("GPL");
42module_param_array(dsp_map, int, NULL, 0444);
43MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
44module_param_array(adsp_map, int, NULL, 0444);
45MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
46module_param(nonblock_open, bool, 0644);
47MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
48MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
49MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
50
51static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
52static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
53static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
54
55/*
56 * helper functions to process hw_params
57 */
58static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
59{
60 int changed = 0;
61 if (i->min < min) {
62 i->min = min;
63 i->openmin = openmin;
64 changed = 1;
65 } else if (i->min == min && !i->openmin && openmin) {
66 i->openmin = 1;
67 changed = 1;
68 }
69 if (i->integer) {
70 if (i->openmin) {
71 i->min++;
72 i->openmin = 0;
73 }
74 }
75 if (snd_interval_checkempty(i)) {
76 snd_interval_none(i);
77 return -EINVAL;
78 }
79 return changed;
80}
81
82static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
83{
84 int changed = 0;
85 if (i->max > max) {
86 i->max = max;
87 i->openmax = openmax;
88 changed = 1;
89 } else if (i->max == max && !i->openmax && openmax) {
90 i->openmax = 1;
91 changed = 1;
92 }
93 if (i->integer) {
94 if (i->openmax) {
95 i->max--;
96 i->openmax = 0;
97 }
98 }
99 if (snd_interval_checkempty(i)) {
100 snd_interval_none(i);
101 return -EINVAL;
102 }
103 return changed;
104}
105
106static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
107{
108 struct snd_interval t;
109 t.empty = 0;
110 t.min = t.max = val;
111 t.openmin = t.openmax = 0;
112 t.integer = 1;
113 return snd_interval_refine(i, &t);
114}
115
116/**
117 * snd_pcm_hw_param_value_min
118 * @params: the hw_params instance
119 * @var: parameter to retrieve
120 * @dir: pointer to the direction (-1,0,1) or NULL
121 *
122 * Return the minimum value for field PAR.
123 */
124static unsigned int
125snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
126 snd_pcm_hw_param_t var, int *dir)
127{
128 if (hw_is_mask(var)) {
129 if (dir)
130 *dir = 0;
131 return snd_mask_min(hw_param_mask_c(params, var));
132 }
133 if (hw_is_interval(var)) {
134 const struct snd_interval *i = hw_param_interval_c(params, var);
135 if (dir)
136 *dir = i->openmin;
137 return snd_interval_min(i);
138 }
139 return -EINVAL;
140}
141
142/**
143 * snd_pcm_hw_param_value_max
144 * @params: the hw_params instance
145 * @var: parameter to retrieve
146 * @dir: pointer to the direction (-1,0,1) or NULL
147 *
148 * Return the maximum value for field PAR.
149 */
150static int
151snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
152 snd_pcm_hw_param_t var, int *dir)
153{
154 if (hw_is_mask(var)) {
155 if (dir)
156 *dir = 0;
157 return snd_mask_max(hw_param_mask_c(params, var));
158 }
159 if (hw_is_interval(var)) {
160 const struct snd_interval *i = hw_param_interval_c(params, var);
161 if (dir)
162 *dir = - (int) i->openmax;
163 return snd_interval_max(i);
164 }
165 return -EINVAL;
166}
167
168static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
169 snd_pcm_hw_param_t var,
170 const struct snd_mask *val)
171{
172 int changed;
173 changed = snd_mask_refine(hw_param_mask(params, var), val);
174 if (changed > 0) {
175 params->cmask |= 1 << var;
176 params->rmask |= 1 << var;
177 }
178 return changed;
179}
180
181static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
182 struct snd_pcm_hw_params *params,
183 snd_pcm_hw_param_t var,
184 const struct snd_mask *val)
185{
186 int changed = _snd_pcm_hw_param_mask(params, var, val);
187 if (changed < 0)
188 return changed;
189 if (params->rmask) {
190 int err = snd_pcm_hw_refine(pcm, params);
191 if (err < 0)
192 return err;
193 }
194 return 0;
195}
196
197static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var, unsigned int val,
199 int dir)
200{
201 int changed;
202 int open = 0;
203 if (dir) {
204 if (dir > 0) {
205 open = 1;
206 } else if (dir < 0) {
207 if (val > 0) {
208 open = 1;
209 val--;
210 }
211 }
212 }
213 if (hw_is_mask(var))
214 changed = snd_mask_refine_min(hw_param_mask(params, var),
215 val + !!open);
216 else if (hw_is_interval(var))
217 changed = snd_interval_refine_min(hw_param_interval(params, var),
218 val, open);
219 else
220 return -EINVAL;
221 if (changed > 0) {
222 params->cmask |= 1 << var;
223 params->rmask |= 1 << var;
224 }
225 return changed;
226}
227
228/**
229 * snd_pcm_hw_param_min
230 * @pcm: PCM instance
231 * @params: the hw_params instance
232 * @var: parameter to retrieve
233 * @val: minimal value
234 * @dir: pointer to the direction (-1,0,1) or NULL
235 *
236 * Inside configuration space defined by PARAMS remove from PAR all
237 * values < VAL. Reduce configuration space accordingly.
238 * Return new minimum or -EINVAL if the configuration space is empty
239 */
240static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
241 struct snd_pcm_hw_params *params,
242 snd_pcm_hw_param_t var, unsigned int val,
243 int *dir)
244{
245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
246 if (changed < 0)
247 return changed;
248 if (params->rmask) {
249 int err = snd_pcm_hw_refine(pcm, params);
250 if (err < 0)
251 return err;
252 }
253 return snd_pcm_hw_param_value_min(params, var, dir);
254}
255
256static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int dir)
259{
260 int changed;
261 int open = 0;
262 if (dir) {
263 if (dir < 0) {
264 open = 1;
265 } else if (dir > 0) {
266 open = 1;
267 val++;
268 }
269 }
270 if (hw_is_mask(var)) {
271 if (val == 0 && open) {
272 snd_mask_none(hw_param_mask(params, var));
273 changed = -EINVAL;
274 } else
275 changed = snd_mask_refine_max(hw_param_mask(params, var),
276 val - !!open);
277 } else if (hw_is_interval(var))
278 changed = snd_interval_refine_max(hw_param_interval(params, var),
279 val, open);
280 else
281 return -EINVAL;
282 if (changed > 0) {
283 params->cmask |= 1 << var;
284 params->rmask |= 1 << var;
285 }
286 return changed;
287}
288
289/**
290 * snd_pcm_hw_param_max
291 * @pcm: PCM instance
292 * @params: the hw_params instance
293 * @var: parameter to retrieve
294 * @val: maximal value
295 * @dir: pointer to the direction (-1,0,1) or NULL
296 *
297 * Inside configuration space defined by PARAMS remove from PAR all
298 * values >= VAL + 1. Reduce configuration space accordingly.
299 * Return new maximum or -EINVAL if the configuration space is empty
300 */
301static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
302 struct snd_pcm_hw_params *params,
303 snd_pcm_hw_param_t var, unsigned int val,
304 int *dir)
305{
306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
307 if (changed < 0)
308 return changed;
309 if (params->rmask) {
310 int err = snd_pcm_hw_refine(pcm, params);
311 if (err < 0)
312 return err;
313 }
314 return snd_pcm_hw_param_value_max(params, var, dir);
315}
316
317static int boundary_sub(int a, int adir,
318 int b, int bdir,
319 int *c, int *cdir)
320{
321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
323 *c = a - b;
324 *cdir = adir - bdir;
325 if (*cdir == -2) {
326 (*c)--;
327 } else if (*cdir == 2) {
328 (*c)++;
329 }
330 return 0;
331}
332
333static int boundary_lt(unsigned int a, int adir,
334 unsigned int b, int bdir)
335{
336 if (adir < 0) {
337 a--;
338 adir = 1;
339 } else if (adir > 0)
340 adir = 1;
341 if (bdir < 0) {
342 b--;
343 bdir = 1;
344 } else if (bdir > 0)
345 bdir = 1;
346 return a < b || (a == b && adir < bdir);
347}
348
349/* Return 1 if min is nearer to best than max */
350static int boundary_nearer(int min, int mindir,
351 int best, int bestdir,
352 int max, int maxdir)
353{
354 int dmin, dmindir;
355 int dmax, dmaxdir;
356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
358 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
359}
360
361/**
362 * snd_pcm_hw_param_near
363 * @pcm: PCM instance
364 * @params: the hw_params instance
365 * @var: parameter to retrieve
366 * @best: value to set
367 * @dir: pointer to the direction (-1,0,1) or NULL
368 *
369 * Inside configuration space defined by PARAMS set PAR to the available value
370 * nearest to VAL. Reduce configuration space accordingly.
371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
373 * Return the value found.
374 */
375static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
376 struct snd_pcm_hw_params *params,
377 snd_pcm_hw_param_t var, unsigned int best,
378 int *dir)
379{
380 struct snd_pcm_hw_params *save = NULL;
381 int v;
382 unsigned int saved_min;
383 int last = 0;
384 int min, max;
385 int mindir, maxdir;
386 int valdir = dir ? *dir : 0;
387 /* FIXME */
388 if (best > INT_MAX)
389 best = INT_MAX;
390 min = max = best;
391 mindir = maxdir = valdir;
392 if (maxdir > 0)
393 maxdir = 0;
394 else if (maxdir == 0)
395 maxdir = -1;
396 else {
397 maxdir = 1;
398 max--;
399 }
400 save = kmalloc(sizeof(*save), GFP_KERNEL);
401 if (save == NULL)
402 return -ENOMEM;
403 *save = *params;
404 saved_min = min;
405 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
406 if (min >= 0) {
407 struct snd_pcm_hw_params *params1;
408 if (max < 0)
409 goto _end;
410 if ((unsigned int)min == saved_min && mindir == valdir)
411 goto _end;
412 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
413 if (params1 == NULL) {
414 kfree(save);
415 return -ENOMEM;
416 }
417 *params1 = *save;
418 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
419 if (max < 0) {
420 kfree(params1);
421 goto _end;
422 }
423 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
424 *params = *params1;
425 last = 1;
426 }
427 kfree(params1);
428 } else {
429 *params = *save;
430 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
431 if (max < 0) {
432 kfree(save);
433 return max;
434 }
435 last = 1;
436 }
437 _end:
438 kfree(save);
439 if (last)
440 v = snd_pcm_hw_param_last(pcm, params, var, dir);
441 else
442 v = snd_pcm_hw_param_first(pcm, params, var, dir);
443 return v;
444}
445
446static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
447 snd_pcm_hw_param_t var, unsigned int val,
448 int dir)
449{
450 int changed;
451 if (hw_is_mask(var)) {
452 struct snd_mask *m = hw_param_mask(params, var);
453 if (val == 0 && dir < 0) {
454 changed = -EINVAL;
455 snd_mask_none(m);
456 } else {
457 if (dir > 0)
458 val++;
459 else if (dir < 0)
460 val--;
461 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
462 }
463 } else if (hw_is_interval(var)) {
464 struct snd_interval *i = hw_param_interval(params, var);
465 if (val == 0 && dir < 0) {
466 changed = -EINVAL;
467 snd_interval_none(i);
468 } else if (dir == 0)
469 changed = snd_interval_refine_set(i, val);
470 else {
471 struct snd_interval t;
472 t.openmin = 1;
473 t.openmax = 1;
474 t.empty = 0;
475 t.integer = 0;
476 if (dir < 0) {
477 t.min = val - 1;
478 t.max = val;
479 } else {
480 t.min = val;
481 t.max = val+1;
482 }
483 changed = snd_interval_refine(i, &t);
484 }
485 } else
486 return -EINVAL;
487 if (changed > 0) {
488 params->cmask |= 1 << var;
489 params->rmask |= 1 << var;
490 }
491 return changed;
492}
493
494/**
495 * snd_pcm_hw_param_set
496 * @pcm: PCM instance
497 * @params: the hw_params instance
498 * @var: parameter to retrieve
499 * @val: value to set
500 * @dir: pointer to the direction (-1,0,1) or NULL
501 *
502 * Inside configuration space defined by PARAMS remove from PAR all
503 * values != VAL. Reduce configuration space accordingly.
504 * Return VAL or -EINVAL if the configuration space is empty
505 */
506static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
507 struct snd_pcm_hw_params *params,
508 snd_pcm_hw_param_t var, unsigned int val,
509 int dir)
510{
511 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
512 if (changed < 0)
513 return changed;
514 if (params->rmask) {
515 int err = snd_pcm_hw_refine(pcm, params);
516 if (err < 0)
517 return err;
518 }
519 return snd_pcm_hw_param_value(params, var, NULL);
520}
521
522static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var)
524{
525 int changed;
526 changed = snd_interval_setinteger(hw_param_interval(params, var));
527 if (changed > 0) {
528 params->cmask |= 1 << var;
529 params->rmask |= 1 << var;
530 }
531 return changed;
532}
533
534/*
535 * plugin
536 */
537
538#ifdef CONFIG_SND_PCM_OSS_PLUGINS
539static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
540{
541 struct snd_pcm_runtime *runtime = substream->runtime;
542 struct snd_pcm_plugin *plugin, *next;
543
544 plugin = runtime->oss.plugin_first;
545 while (plugin) {
546 next = plugin->next;
547 snd_pcm_plugin_free(plugin);
548 plugin = next;
549 }
550 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
551 return 0;
552}
553
554static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
555{
556 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
557 plugin->next = runtime->oss.plugin_first;
558 plugin->prev = NULL;
559 if (runtime->oss.plugin_first) {
560 runtime->oss.plugin_first->prev = plugin;
561 runtime->oss.plugin_first = plugin;
562 } else {
563 runtime->oss.plugin_last =
564 runtime->oss.plugin_first = plugin;
565 }
566 return 0;
567}
568
569int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
570{
571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
572 plugin->next = NULL;
573 plugin->prev = runtime->oss.plugin_last;
574 if (runtime->oss.plugin_last) {
575 runtime->oss.plugin_last->next = plugin;
576 runtime->oss.plugin_last = plugin;
577 } else {
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
580 }
581 return 0;
582}
583#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
584
585static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
586{
587 struct snd_pcm_runtime *runtime = substream->runtime;
588 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
589 long bytes = frames_to_bytes(runtime, frames);
590 if (buffer_size == runtime->oss.buffer_bytes)
591 return bytes;
592#if BITS_PER_LONG >= 64
593 return runtime->oss.buffer_bytes * bytes / buffer_size;
594#else
595 {
596 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
597 return div_u64(bsize, buffer_size);
598 }
599#endif
600}
601
602static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
603{
604 struct snd_pcm_runtime *runtime = substream->runtime;
605 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
606 if (buffer_size == runtime->oss.buffer_bytes)
607 return bytes_to_frames(runtime, bytes);
608 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
609}
610
611static inline
612snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
613{
614 return runtime->hw_ptr_interrupt;
615}
616
617/* define extended formats in the recent OSS versions (if any) */
618/* linear formats */
619#define AFMT_S32_LE 0x00001000
620#define AFMT_S32_BE 0x00002000
621#define AFMT_S24_LE 0x00008000
622#define AFMT_S24_BE 0x00010000
623#define AFMT_S24_PACKED 0x00040000
624
625/* other supported formats */
626#define AFMT_FLOAT 0x00004000
627#define AFMT_SPDIF_RAW 0x00020000
628
629/* unsupported formats */
630#define AFMT_AC3 0x00000400
631#define AFMT_VORBIS 0x00000800
632
633static snd_pcm_format_t snd_pcm_oss_format_from(int format)
634{
635 switch (format) {
636 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
637 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
638 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
639 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
640 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
641 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
642 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
643 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
644 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
645 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
646 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
647 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
648 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
649 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
650 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
651 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
652 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
653 default: return SNDRV_PCM_FORMAT_U8;
654 }
655}
656
657static int snd_pcm_oss_format_to(snd_pcm_format_t format)
658{
659 switch (format) {
660 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
661 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
662 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
663 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
664 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
665 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
666 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
667 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
668 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
669 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
670 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
671 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
672 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
673 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
674 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
675 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
676 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
677 default: return -EINVAL;
678 }
679}
680
681static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
682 struct snd_pcm_hw_params *oss_params,
683 struct snd_pcm_hw_params *slave_params)
684{
685 ssize_t s;
686 ssize_t oss_buffer_size;
687 ssize_t oss_period_size, oss_periods;
688 ssize_t min_period_size, max_period_size;
689 struct snd_pcm_runtime *runtime = substream->runtime;
690 size_t oss_frame_size;
691
692 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
693 params_channels(oss_params) / 8;
694
695 oss_buffer_size = snd_pcm_hw_param_value_max(slave_params,
696 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
697 NULL);
698 if (oss_buffer_size <= 0)
699 return -EINVAL;
700 oss_buffer_size = snd_pcm_plug_client_size(substream,
701 oss_buffer_size * oss_frame_size);
702 if (oss_buffer_size <= 0)
703 return -EINVAL;
704 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
705 if (atomic_read(&substream->mmap_count)) {
706 if (oss_buffer_size > runtime->oss.mmap_bytes)
707 oss_buffer_size = runtime->oss.mmap_bytes;
708 }
709
710 if (substream->oss.setup.period_size > 16)
711 oss_period_size = substream->oss.setup.period_size;
712 else if (runtime->oss.fragshift) {
713 oss_period_size = 1 << runtime->oss.fragshift;
714 if (oss_period_size > oss_buffer_size / 2)
715 oss_period_size = oss_buffer_size / 2;
716 } else {
717 int sd;
718 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
719
720 oss_period_size = oss_buffer_size;
721 do {
722 oss_period_size /= 2;
723 } while (oss_period_size > bytes_per_sec);
724 if (runtime->oss.subdivision == 0) {
725 sd = 4;
726 if (oss_period_size / sd > 4096)
727 sd *= 2;
728 if (oss_period_size / sd < 4096)
729 sd = 1;
730 } else
731 sd = runtime->oss.subdivision;
732 oss_period_size /= sd;
733 if (oss_period_size < 16)
734 oss_period_size = 16;
735 }
736
737 min_period_size = snd_pcm_plug_client_size(substream,
738 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
739 if (min_period_size > 0) {
740 min_period_size *= oss_frame_size;
741 min_period_size = roundup_pow_of_two(min_period_size);
742 if (oss_period_size < min_period_size)
743 oss_period_size = min_period_size;
744 }
745
746 max_period_size = snd_pcm_plug_client_size(substream,
747 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
748 if (max_period_size > 0) {
749 max_period_size *= oss_frame_size;
750 max_period_size = rounddown_pow_of_two(max_period_size);
751 if (oss_period_size > max_period_size)
752 oss_period_size = max_period_size;
753 }
754
755 oss_periods = oss_buffer_size / oss_period_size;
756
757 if (substream->oss.setup.periods > 1)
758 oss_periods = substream->oss.setup.periods;
759
760 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
761 if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
762 s = runtime->oss.maxfrags;
763 if (oss_periods > s)
764 oss_periods = s;
765
766 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
767 if (s < 2)
768 s = 2;
769 if (oss_periods < s)
770 oss_periods = s;
771
772 while (oss_period_size * oss_periods > oss_buffer_size)
773 oss_period_size /= 2;
774
775 if (oss_period_size < 16)
776 return -EINVAL;
777
778 /* don't allocate too large period; 1MB period must be enough */
779 if (oss_period_size > 1024 * 1024)
780 return -ENOMEM;
781
782 runtime->oss.period_bytes = oss_period_size;
783 runtime->oss.period_frames = 1;
784 runtime->oss.periods = oss_periods;
785 return 0;
786}
787
788static int choose_rate(struct snd_pcm_substream *substream,
789 struct snd_pcm_hw_params *params, unsigned int best_rate)
790{
791 const struct snd_interval *it;
792 struct snd_pcm_hw_params *save;
793 unsigned int rate, prev;
794
795 save = kmalloc(sizeof(*save), GFP_KERNEL);
796 if (save == NULL)
797 return -ENOMEM;
798 *save = *params;
799 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
800
801 /* try multiples of the best rate */
802 rate = best_rate;
803 for (;;) {
804 if (it->max < rate || (it->max == rate && it->openmax))
805 break;
806 if (it->min < rate || (it->min == rate && !it->openmin)) {
807 int ret;
808 ret = snd_pcm_hw_param_set(substream, params,
809 SNDRV_PCM_HW_PARAM_RATE,
810 rate, 0);
811 if (ret == (int)rate) {
812 kfree(save);
813 return rate;
814 }
815 *params = *save;
816 }
817 prev = rate;
818 rate += best_rate;
819 if (rate <= prev)
820 break;
821 }
822
823 /* not found, use the nearest rate */
824 kfree(save);
825 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
826}
827
828/* parameter locking: returns immediately if tried during streaming */
829static int lock_params(struct snd_pcm_runtime *runtime)
830{
831 if (mutex_lock_interruptible(&runtime->oss.params_lock))
832 return -ERESTARTSYS;
833 if (atomic_read(&runtime->oss.rw_ref)) {
834 mutex_unlock(&runtime->oss.params_lock);
835 return -EBUSY;
836 }
837 return 0;
838}
839
840static void unlock_params(struct snd_pcm_runtime *runtime)
841{
842 mutex_unlock(&runtime->oss.params_lock);
843}
844
845static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream)
846{
847 struct snd_pcm_runtime *runtime = substream->runtime;
848
849 kvfree(runtime->oss.buffer);
850 runtime->oss.buffer = NULL;
851#ifdef CONFIG_SND_PCM_OSS_PLUGINS
852 snd_pcm_oss_plugin_clear(substream);
853#endif
854}
855
856/* call with params_lock held */
857static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
858{
859 struct snd_pcm_runtime *runtime = substream->runtime;
860 struct snd_pcm_hw_params *params, *sparams;
861 struct snd_pcm_sw_params *sw_params;
862 ssize_t oss_buffer_size, oss_period_size;
863 size_t oss_frame_size;
864 int err;
865 int direct;
866 snd_pcm_format_t format, sformat;
867 int n;
868 const struct snd_mask *sformat_mask;
869 struct snd_mask mask;
870
871 if (!runtime->oss.params)
872 return 0;
873 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
874 params = kmalloc(sizeof(*params), GFP_KERNEL);
875 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
876 if (!sw_params || !params || !sparams) {
877 err = -ENOMEM;
878 goto failure;
879 }
880
881 if (atomic_read(&substream->mmap_count))
882 direct = 1;
883 else
884 direct = substream->oss.setup.direct;
885
886 _snd_pcm_hw_params_any(sparams);
887 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
888 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
889 snd_mask_none(&mask);
890 if (atomic_read(&substream->mmap_count))
891 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
892 else {
893 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
894 if (!direct)
895 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
896 }
897 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
898 if (err < 0) {
899 pcm_dbg(substream->pcm, "No usable accesses\n");
900 err = -EINVAL;
901 goto failure;
902 }
903
904 err = choose_rate(substream, sparams, runtime->oss.rate);
905 if (err < 0)
906 goto failure;
907 err = snd_pcm_hw_param_near(substream, sparams,
908 SNDRV_PCM_HW_PARAM_CHANNELS,
909 runtime->oss.channels, NULL);
910 if (err < 0)
911 goto failure;
912
913 format = snd_pcm_oss_format_from(runtime->oss.format);
914
915 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
916 if (direct)
917 sformat = format;
918 else
919 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
920
921 if ((__force int)sformat < 0 ||
922 !snd_mask_test_format(sformat_mask, sformat)) {
923 pcm_for_each_format(sformat) {
924 if (snd_mask_test_format(sformat_mask, sformat) &&
925 snd_pcm_oss_format_to(sformat) >= 0)
926 goto format_found;
927 }
928 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
929 err = -EINVAL;
930 goto failure;
931 }
932 format_found:
933 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
934 if (err < 0)
935 goto failure;
936
937 if (direct) {
938 memcpy(params, sparams, sizeof(*params));
939 } else {
940 _snd_pcm_hw_params_any(params);
941 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
942 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
943 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
944 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
945 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
946 runtime->oss.channels, 0);
947 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
948 runtime->oss.rate, 0);
949 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
950 params_access(params), params_format(params),
951 params_channels(params), params_rate(params));
952 }
953 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
954 params_access(sparams), params_format(sparams),
955 params_channels(sparams), params_rate(sparams));
956
957 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
958 params_channels(params) / 8;
959
960 err = snd_pcm_oss_period_size(substream, params, sparams);
961 if (err < 0)
962 goto failure;
963
964 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
965 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
966 if (err < 0)
967 goto failure;
968
969 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
970 runtime->oss.periods, NULL);
971 if (err < 0)
972 goto failure;
973
974 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
975
976 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
977 if (err < 0) {
978 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
979 goto failure;
980 }
981
982#ifdef CONFIG_SND_PCM_OSS_PLUGINS
983 snd_pcm_oss_plugin_clear(substream);
984 if (!direct) {
985 /* add necessary plugins */
986 err = snd_pcm_plug_format_plugins(substream, params, sparams);
987 if (err < 0) {
988 pcm_dbg(substream->pcm,
989 "snd_pcm_plug_format_plugins failed: %i\n", err);
990 goto failure;
991 }
992 if (runtime->oss.plugin_first) {
993 struct snd_pcm_plugin *plugin;
994 err = snd_pcm_plugin_build_io(substream, sparams, &plugin);
995 if (err < 0) {
996 pcm_dbg(substream->pcm,
997 "snd_pcm_plugin_build_io failed: %i\n", err);
998 goto failure;
999 }
1000 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1001 err = snd_pcm_plugin_append(plugin);
1002 } else {
1003 err = snd_pcm_plugin_insert(plugin);
1004 }
1005 if (err < 0)
1006 goto failure;
1007 }
1008 }
1009#endif
1010
1011 if (runtime->oss.trigger) {
1012 sw_params->start_threshold = 1;
1013 } else {
1014 sw_params->start_threshold = runtime->boundary;
1015 }
1016 if (atomic_read(&substream->mmap_count) ||
1017 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1018 sw_params->stop_threshold = runtime->boundary;
1019 else
1020 sw_params->stop_threshold = runtime->buffer_size;
1021 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1022 sw_params->period_step = 1;
1023 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1024 1 : runtime->period_size;
1025 if (atomic_read(&substream->mmap_count) ||
1026 substream->oss.setup.nosilence) {
1027 sw_params->silence_threshold = 0;
1028 sw_params->silence_size = 0;
1029 } else {
1030 snd_pcm_uframes_t frames;
1031 frames = runtime->period_size + 16;
1032 if (frames > runtime->buffer_size)
1033 frames = runtime->buffer_size;
1034 sw_params->silence_threshold = frames;
1035 sw_params->silence_size = frames;
1036 }
1037
1038 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params);
1039 if (err < 0) {
1040 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1041 goto failure;
1042 }
1043
1044 runtime->oss.periods = params_periods(sparams);
1045 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1046 if (oss_period_size < 0) {
1047 err = -EINVAL;
1048 goto failure;
1049 }
1050#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1051 if (runtime->oss.plugin_first) {
1052 err = snd_pcm_plug_alloc(substream, oss_period_size);
1053 if (err < 0)
1054 goto failure;
1055 }
1056#endif
1057 oss_period_size = array_size(oss_period_size, oss_frame_size);
1058 oss_buffer_size = array_size(oss_period_size, runtime->oss.periods);
1059 if (oss_buffer_size <= 0) {
1060 err = -EINVAL;
1061 goto failure;
1062 }
1063
1064 runtime->oss.period_bytes = oss_period_size;
1065 runtime->oss.buffer_bytes = oss_buffer_size;
1066
1067 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1068 runtime->oss.period_bytes,
1069 runtime->oss.buffer_bytes);
1070 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1071 params_period_size(sparams),
1072 params_buffer_size(sparams));
1073
1074 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1075 runtime->oss.channels = params_channels(params);
1076 runtime->oss.rate = params_rate(params);
1077
1078 kvfree(runtime->oss.buffer);
1079 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1080 if (!runtime->oss.buffer) {
1081 err = -ENOMEM;
1082 goto failure;
1083 }
1084
1085 runtime->oss.params = 0;
1086 runtime->oss.prepare = 1;
1087 runtime->oss.buffer_used = 0;
1088 if (runtime->dma_area)
1089 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1090
1091 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1092
1093 err = 0;
1094failure:
1095 if (err)
1096 snd_pcm_oss_release_buffers(substream);
1097 kfree(sw_params);
1098 kfree(params);
1099 kfree(sparams);
1100 return err;
1101}
1102
1103/* this one takes the lock by itself */
1104static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1105 bool trylock)
1106{
1107 struct snd_pcm_runtime *runtime = substream->runtime;
1108 int err;
1109
1110 if (trylock) {
1111 if (!(mutex_trylock(&runtime->oss.params_lock)))
1112 return -EAGAIN;
1113 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1114 return -ERESTARTSYS;
1115
1116 err = snd_pcm_oss_change_params_locked(substream);
1117 mutex_unlock(&runtime->oss.params_lock);
1118 return err;
1119}
1120
1121static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1122{
1123 int idx, err;
1124 struct snd_pcm_substream *asubstream = NULL, *substream;
1125
1126 for (idx = 0; idx < 2; idx++) {
1127 substream = pcm_oss_file->streams[idx];
1128 if (substream == NULL)
1129 continue;
1130 if (asubstream == NULL)
1131 asubstream = substream;
1132 if (substream->runtime->oss.params) {
1133 err = snd_pcm_oss_change_params(substream, false);
1134 if (err < 0)
1135 return err;
1136 }
1137 }
1138 if (!asubstream)
1139 return -EIO;
1140 if (r_substream)
1141 *r_substream = asubstream;
1142 return 0;
1143}
1144
1145/* call with params_lock held */
1146/* NOTE: this always call PREPARE unconditionally no matter whether
1147 * runtime->oss.prepare is set or not
1148 */
1149static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1150{
1151 int err;
1152 struct snd_pcm_runtime *runtime = substream->runtime;
1153
1154 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1155 if (err < 0) {
1156 pcm_dbg(substream->pcm,
1157 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1158 return err;
1159 }
1160 runtime->oss.prepare = 0;
1161 runtime->oss.prev_hw_ptr_period = 0;
1162 runtime->oss.period_ptr = 0;
1163 runtime->oss.buffer_used = 0;
1164
1165 return 0;
1166}
1167
1168static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1169{
1170 struct snd_pcm_runtime *runtime;
1171 int err;
1172
1173 runtime = substream->runtime;
1174 if (runtime->oss.params) {
1175 err = snd_pcm_oss_change_params(substream, false);
1176 if (err < 0)
1177 return err;
1178 }
1179 if (runtime->oss.prepare) {
1180 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1181 return -ERESTARTSYS;
1182 err = snd_pcm_oss_prepare(substream);
1183 mutex_unlock(&runtime->oss.params_lock);
1184 if (err < 0)
1185 return err;
1186 }
1187 return 0;
1188}
1189
1190/* call with params_lock held */
1191static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1192{
1193 struct snd_pcm_runtime *runtime;
1194 int err;
1195
1196 runtime = substream->runtime;
1197 if (runtime->oss.params) {
1198 err = snd_pcm_oss_change_params_locked(substream);
1199 if (err < 0)
1200 return err;
1201 }
1202 if (runtime->oss.prepare) {
1203 err = snd_pcm_oss_prepare(substream);
1204 if (err < 0)
1205 return err;
1206 }
1207 return 0;
1208}
1209
1210static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1211{
1212 struct snd_pcm_runtime *runtime;
1213 snd_pcm_uframes_t frames;
1214 int err = 0;
1215
1216 while (1) {
1217 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1218 if (err < 0)
1219 break;
1220 runtime = substream->runtime;
1221 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1222 break;
1223 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1224 /* until avail(delay) <= buffer_size */
1225 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1226 frames /= runtime->period_size;
1227 frames *= runtime->period_size;
1228 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1229 if (err < 0)
1230 break;
1231 }
1232 return err;
1233}
1234
1235snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1236{
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1238 int ret;
1239 while (1) {
1240 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1241 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1242#ifdef OSS_DEBUG
1243 pcm_dbg(substream->pcm,
1244 "pcm_oss: write: recovering from %s\n",
1245 runtime->state == SNDRV_PCM_STATE_XRUN ?
1246 "XRUN" : "SUSPEND");
1247#endif
1248 ret = snd_pcm_oss_prepare(substream);
1249 if (ret < 0)
1250 break;
1251 }
1252 mutex_unlock(&runtime->oss.params_lock);
1253 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1254 frames, in_kernel);
1255 mutex_lock(&runtime->oss.params_lock);
1256 if (ret != -EPIPE && ret != -ESTRPIPE)
1257 break;
1258 /* test, if we can't store new data, because the stream */
1259 /* has not been started */
1260 if (runtime->state == SNDRV_PCM_STATE_PREPARED)
1261 return -EAGAIN;
1262 }
1263 return ret;
1264}
1265
1266snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1267{
1268 struct snd_pcm_runtime *runtime = substream->runtime;
1269 snd_pcm_sframes_t delay;
1270 int ret;
1271 while (1) {
1272 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1273 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1274#ifdef OSS_DEBUG
1275 pcm_dbg(substream->pcm,
1276 "pcm_oss: read: recovering from %s\n",
1277 runtime->state == SNDRV_PCM_STATE_XRUN ?
1278 "XRUN" : "SUSPEND");
1279#endif
1280 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1281 if (ret < 0)
1282 break;
1283 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
1284 ret = snd_pcm_oss_prepare(substream);
1285 if (ret < 0)
1286 break;
1287 }
1288 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1289 if (ret < 0)
1290 break;
1291 mutex_unlock(&runtime->oss.params_lock);
1292 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1293 frames, in_kernel);
1294 mutex_lock(&runtime->oss.params_lock);
1295 if (ret == -EPIPE) {
1296 if (runtime->state == SNDRV_PCM_STATE_DRAINING) {
1297 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1298 if (ret < 0)
1299 break;
1300 }
1301 continue;
1302 }
1303 if (ret != -ESTRPIPE)
1304 break;
1305 }
1306 return ret;
1307}
1308
1309#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1310snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1311{
1312 struct snd_pcm_runtime *runtime = substream->runtime;
1313 int ret;
1314 while (1) {
1315 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1316 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1317#ifdef OSS_DEBUG
1318 pcm_dbg(substream->pcm,
1319 "pcm_oss: writev: recovering from %s\n",
1320 runtime->state == SNDRV_PCM_STATE_XRUN ?
1321 "XRUN" : "SUSPEND");
1322#endif
1323 ret = snd_pcm_oss_prepare(substream);
1324 if (ret < 0)
1325 break;
1326 }
1327 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1328 if (ret != -EPIPE && ret != -ESTRPIPE)
1329 break;
1330
1331 /* test, if we can't store new data, because the stream */
1332 /* has not been started */
1333 if (runtime->state == SNDRV_PCM_STATE_PREPARED)
1334 return -EAGAIN;
1335 }
1336 return ret;
1337}
1338
1339snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1340{
1341 struct snd_pcm_runtime *runtime = substream->runtime;
1342 int ret;
1343 while (1) {
1344 if (runtime->state == SNDRV_PCM_STATE_XRUN ||
1345 runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
1346#ifdef OSS_DEBUG
1347 pcm_dbg(substream->pcm,
1348 "pcm_oss: readv: recovering from %s\n",
1349 runtime->state == SNDRV_PCM_STATE_XRUN ?
1350 "XRUN" : "SUSPEND");
1351#endif
1352 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1353 if (ret < 0)
1354 break;
1355 } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
1356 ret = snd_pcm_oss_prepare(substream);
1357 if (ret < 0)
1358 break;
1359 }
1360 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1361 if (ret != -EPIPE && ret != -ESTRPIPE)
1362 break;
1363 }
1364 return ret;
1365}
1366#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1367
1368static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1369{
1370 struct snd_pcm_runtime *runtime = substream->runtime;
1371 snd_pcm_sframes_t frames, frames1;
1372#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1373 if (runtime->oss.plugin_first) {
1374 struct snd_pcm_plugin_channel *channels;
1375 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1376 if (!in_kernel) {
1377 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1378 return -EFAULT;
1379 buf = runtime->oss.buffer;
1380 }
1381 frames = bytes / oss_frame_bytes;
1382 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1383 if (frames1 < 0)
1384 return frames1;
1385 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1386 if (frames1 <= 0)
1387 return frames1;
1388 bytes = frames1 * oss_frame_bytes;
1389 } else
1390#endif
1391 {
1392 frames = bytes_to_frames(runtime, bytes);
1393 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1394 if (frames1 <= 0)
1395 return frames1;
1396 bytes = frames_to_bytes(runtime, frames1);
1397 }
1398 return bytes;
1399}
1400
1401static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1402{
1403 size_t xfer = 0;
1404 ssize_t tmp = 0;
1405 struct snd_pcm_runtime *runtime = substream->runtime;
1406
1407 if (atomic_read(&substream->mmap_count))
1408 return -ENXIO;
1409
1410 atomic_inc(&runtime->oss.rw_ref);
1411 while (bytes > 0) {
1412 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1413 tmp = -ERESTARTSYS;
1414 break;
1415 }
1416 tmp = snd_pcm_oss_make_ready_locked(substream);
1417 if (tmp < 0)
1418 goto err;
1419 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1420 tmp = bytes;
1421 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1422 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1423 if (tmp > 0) {
1424 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1425 tmp = -EFAULT;
1426 goto err;
1427 }
1428 }
1429 runtime->oss.buffer_used += tmp;
1430 buf += tmp;
1431 bytes -= tmp;
1432 xfer += tmp;
1433 if (substream->oss.setup.partialfrag ||
1434 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1435 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1436 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1437 if (tmp <= 0)
1438 goto err;
1439 runtime->oss.bytes += tmp;
1440 runtime->oss.period_ptr += tmp;
1441 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1442 if (runtime->oss.period_ptr == 0 ||
1443 runtime->oss.period_ptr == runtime->oss.buffer_used)
1444 runtime->oss.buffer_used = 0;
1445 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1446 tmp = -EAGAIN;
1447 goto err;
1448 }
1449 }
1450 } else {
1451 tmp = snd_pcm_oss_write2(substream,
1452 (const char __force *)buf,
1453 runtime->oss.period_bytes, 0);
1454 if (tmp <= 0)
1455 goto err;
1456 runtime->oss.bytes += tmp;
1457 buf += tmp;
1458 bytes -= tmp;
1459 xfer += tmp;
1460 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1461 tmp != runtime->oss.period_bytes)
1462 tmp = -EAGAIN;
1463 }
1464 err:
1465 mutex_unlock(&runtime->oss.params_lock);
1466 if (tmp < 0)
1467 break;
1468 if (signal_pending(current)) {
1469 tmp = -ERESTARTSYS;
1470 break;
1471 }
1472 tmp = 0;
1473 }
1474 atomic_dec(&runtime->oss.rw_ref);
1475 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1476}
1477
1478static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1479{
1480 struct snd_pcm_runtime *runtime = substream->runtime;
1481 snd_pcm_sframes_t frames, frames1;
1482#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1483 char __user *final_dst = (char __force __user *)buf;
1484 if (runtime->oss.plugin_first) {
1485 struct snd_pcm_plugin_channel *channels;
1486 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1487 if (!in_kernel)
1488 buf = runtime->oss.buffer;
1489 frames = bytes / oss_frame_bytes;
1490 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1491 if (frames1 < 0)
1492 return frames1;
1493 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1494 if (frames1 <= 0)
1495 return frames1;
1496 bytes = frames1 * oss_frame_bytes;
1497 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1498 return -EFAULT;
1499 } else
1500#endif
1501 {
1502 frames = bytes_to_frames(runtime, bytes);
1503 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1504 if (frames1 <= 0)
1505 return frames1;
1506 bytes = frames_to_bytes(runtime, frames1);
1507 }
1508 return bytes;
1509}
1510
1511static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1512{
1513 size_t xfer = 0;
1514 ssize_t tmp = 0;
1515 struct snd_pcm_runtime *runtime = substream->runtime;
1516
1517 if (atomic_read(&substream->mmap_count))
1518 return -ENXIO;
1519
1520 atomic_inc(&runtime->oss.rw_ref);
1521 while (bytes > 0) {
1522 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1523 tmp = -ERESTARTSYS;
1524 break;
1525 }
1526 tmp = snd_pcm_oss_make_ready_locked(substream);
1527 if (tmp < 0)
1528 goto err;
1529 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1530 if (runtime->oss.buffer_used == 0) {
1531 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1532 if (tmp <= 0)
1533 goto err;
1534 runtime->oss.bytes += tmp;
1535 runtime->oss.period_ptr = tmp;
1536 runtime->oss.buffer_used = tmp;
1537 }
1538 tmp = bytes;
1539 if ((size_t) tmp > runtime->oss.buffer_used)
1540 tmp = runtime->oss.buffer_used;
1541 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1542 tmp = -EFAULT;
1543 goto err;
1544 }
1545 buf += tmp;
1546 bytes -= tmp;
1547 xfer += tmp;
1548 runtime->oss.buffer_used -= tmp;
1549 } else {
1550 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1551 runtime->oss.period_bytes, 0);
1552 if (tmp <= 0)
1553 goto err;
1554 runtime->oss.bytes += tmp;
1555 buf += tmp;
1556 bytes -= tmp;
1557 xfer += tmp;
1558 }
1559 err:
1560 mutex_unlock(&runtime->oss.params_lock);
1561 if (tmp < 0)
1562 break;
1563 if (signal_pending(current)) {
1564 tmp = -ERESTARTSYS;
1565 break;
1566 }
1567 tmp = 0;
1568 }
1569 atomic_dec(&runtime->oss.rw_ref);
1570 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1571}
1572
1573static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1574{
1575 struct snd_pcm_substream *substream;
1576 struct snd_pcm_runtime *runtime;
1577 int i;
1578
1579 for (i = 0; i < 2; i++) {
1580 substream = pcm_oss_file->streams[i];
1581 if (!substream)
1582 continue;
1583 runtime = substream->runtime;
1584 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1585 mutex_lock(&runtime->oss.params_lock);
1586 runtime->oss.prepare = 1;
1587 runtime->oss.buffer_used = 0;
1588 runtime->oss.prev_hw_ptr_period = 0;
1589 runtime->oss.period_ptr = 0;
1590 mutex_unlock(&runtime->oss.params_lock);
1591 }
1592 return 0;
1593}
1594
1595static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1596{
1597 struct snd_pcm_substream *substream;
1598 int err;
1599
1600 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1601 if (substream != NULL) {
1602 err = snd_pcm_oss_make_ready(substream);
1603 if (err < 0)
1604 return err;
1605 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1606 }
1607 /* note: all errors from the start action are ignored */
1608 /* OSS apps do not know, how to handle them */
1609 return 0;
1610}
1611
1612static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1613{
1614 struct snd_pcm_runtime *runtime;
1615 ssize_t result = 0;
1616 snd_pcm_state_t state;
1617 long res;
1618 wait_queue_entry_t wait;
1619
1620 runtime = substream->runtime;
1621 init_waitqueue_entry(&wait, current);
1622 add_wait_queue(&runtime->sleep, &wait);
1623#ifdef OSS_DEBUG
1624 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1625#endif
1626 while (1) {
1627 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1628 if (result > 0) {
1629 runtime->oss.buffer_used = 0;
1630 result = 0;
1631 break;
1632 }
1633 if (result != 0 && result != -EAGAIN)
1634 break;
1635 result = 0;
1636 set_current_state(TASK_INTERRUPTIBLE);
1637 snd_pcm_stream_lock_irq(substream);
1638 state = runtime->state;
1639 snd_pcm_stream_unlock_irq(substream);
1640 if (state != SNDRV_PCM_STATE_RUNNING) {
1641 set_current_state(TASK_RUNNING);
1642 break;
1643 }
1644 res = schedule_timeout(10 * HZ);
1645 if (signal_pending(current)) {
1646 result = -ERESTARTSYS;
1647 break;
1648 }
1649 if (res == 0) {
1650 pcm_err(substream->pcm,
1651 "OSS sync error - DMA timeout\n");
1652 result = -EIO;
1653 break;
1654 }
1655 }
1656 remove_wait_queue(&runtime->sleep, &wait);
1657 return result;
1658}
1659
1660static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1661{
1662 int err = 0;
1663 unsigned int saved_f_flags;
1664 struct snd_pcm_substream *substream;
1665 struct snd_pcm_runtime *runtime;
1666 snd_pcm_format_t format;
1667 unsigned long width;
1668 size_t size;
1669
1670 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1671 if (substream != NULL) {
1672 runtime = substream->runtime;
1673 if (atomic_read(&substream->mmap_count))
1674 goto __direct;
1675 atomic_inc(&runtime->oss.rw_ref);
1676 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1677 atomic_dec(&runtime->oss.rw_ref);
1678 return -ERESTARTSYS;
1679 }
1680 err = snd_pcm_oss_make_ready_locked(substream);
1681 if (err < 0)
1682 goto unlock;
1683 format = snd_pcm_oss_format_from(runtime->oss.format);
1684 width = snd_pcm_format_physical_width(format);
1685 if (runtime->oss.buffer_used > 0) {
1686#ifdef OSS_DEBUG
1687 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1688#endif
1689 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1690 snd_pcm_format_set_silence(format,
1691 runtime->oss.buffer + runtime->oss.buffer_used,
1692 size);
1693 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1694 if (err < 0)
1695 goto unlock;
1696 } else if (runtime->oss.period_ptr > 0) {
1697#ifdef OSS_DEBUG
1698 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1699#endif
1700 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1701 snd_pcm_format_set_silence(format,
1702 runtime->oss.buffer,
1703 size * 8 / width);
1704 err = snd_pcm_oss_sync1(substream, size);
1705 if (err < 0)
1706 goto unlock;
1707 }
1708 /*
1709 * The ALSA's period might be a bit large than OSS one.
1710 * Fill the remain portion of ALSA period with zeros.
1711 */
1712 size = runtime->control->appl_ptr % runtime->period_size;
1713 if (size > 0) {
1714 size = runtime->period_size - size;
1715 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1716 snd_pcm_lib_write(substream, NULL, size);
1717 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1718 snd_pcm_lib_writev(substream, NULL, size);
1719 }
1720unlock:
1721 mutex_unlock(&runtime->oss.params_lock);
1722 atomic_dec(&runtime->oss.rw_ref);
1723 if (err < 0)
1724 return err;
1725 /*
1726 * finish sync: drain the buffer
1727 */
1728 __direct:
1729 saved_f_flags = substream->f_flags;
1730 substream->f_flags &= ~O_NONBLOCK;
1731 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1732 substream->f_flags = saved_f_flags;
1733 if (err < 0)
1734 return err;
1735 mutex_lock(&runtime->oss.params_lock);
1736 runtime->oss.prepare = 1;
1737 mutex_unlock(&runtime->oss.params_lock);
1738 }
1739
1740 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1741 if (substream != NULL) {
1742 err = snd_pcm_oss_make_ready(substream);
1743 if (err < 0)
1744 return err;
1745 runtime = substream->runtime;
1746 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1747 if (err < 0)
1748 return err;
1749 mutex_lock(&runtime->oss.params_lock);
1750 runtime->oss.buffer_used = 0;
1751 runtime->oss.prepare = 1;
1752 mutex_unlock(&runtime->oss.params_lock);
1753 }
1754 return 0;
1755}
1756
1757static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1758{
1759 int idx;
1760
1761 for (idx = 1; idx >= 0; --idx) {
1762 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1763 struct snd_pcm_runtime *runtime;
1764 int err;
1765
1766 if (substream == NULL)
1767 continue;
1768 runtime = substream->runtime;
1769 if (rate < 1000)
1770 rate = 1000;
1771 else if (rate > 192000)
1772 rate = 192000;
1773 err = lock_params(runtime);
1774 if (err < 0)
1775 return err;
1776 if (runtime->oss.rate != rate) {
1777 runtime->oss.params = 1;
1778 runtime->oss.rate = rate;
1779 }
1780 unlock_params(runtime);
1781 }
1782 return snd_pcm_oss_get_rate(pcm_oss_file);
1783}
1784
1785static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1786{
1787 struct snd_pcm_substream *substream;
1788 int err;
1789
1790 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1791 if (err < 0)
1792 return err;
1793 return substream->runtime->oss.rate;
1794}
1795
1796static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1797{
1798 int idx;
1799 if (channels < 1)
1800 channels = 1;
1801 if (channels > 128)
1802 return -EINVAL;
1803 for (idx = 1; idx >= 0; --idx) {
1804 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1805 struct snd_pcm_runtime *runtime;
1806 int err;
1807
1808 if (substream == NULL)
1809 continue;
1810 runtime = substream->runtime;
1811 err = lock_params(runtime);
1812 if (err < 0)
1813 return err;
1814 if (runtime->oss.channels != channels) {
1815 runtime->oss.params = 1;
1816 runtime->oss.channels = channels;
1817 }
1818 unlock_params(runtime);
1819 }
1820 return snd_pcm_oss_get_channels(pcm_oss_file);
1821}
1822
1823static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1824{
1825 struct snd_pcm_substream *substream;
1826 int err;
1827
1828 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1829 if (err < 0)
1830 return err;
1831 return substream->runtime->oss.channels;
1832}
1833
1834static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1835{
1836 struct snd_pcm_substream *substream;
1837 int err;
1838
1839 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1840 if (err < 0)
1841 return err;
1842 return substream->runtime->oss.period_bytes;
1843}
1844
1845static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1846{
1847 struct snd_pcm_substream *substream;
1848 int err;
1849 int direct;
1850 struct snd_pcm_hw_params *params;
1851 unsigned int formats = 0;
1852 const struct snd_mask *format_mask;
1853 int fmt;
1854
1855 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1856 if (err < 0)
1857 return err;
1858 if (atomic_read(&substream->mmap_count))
1859 direct = 1;
1860 else
1861 direct = substream->oss.setup.direct;
1862 if (!direct)
1863 return AFMT_MU_LAW | AFMT_U8 |
1864 AFMT_S16_LE | AFMT_S16_BE |
1865 AFMT_S8 | AFMT_U16_LE |
1866 AFMT_U16_BE |
1867 AFMT_S32_LE | AFMT_S32_BE |
1868 AFMT_S24_LE | AFMT_S24_BE |
1869 AFMT_S24_PACKED;
1870 params = kmalloc(sizeof(*params), GFP_KERNEL);
1871 if (!params)
1872 return -ENOMEM;
1873 _snd_pcm_hw_params_any(params);
1874 err = snd_pcm_hw_refine(substream, params);
1875 if (err < 0)
1876 goto error;
1877 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1878 for (fmt = 0; fmt < 32; ++fmt) {
1879 if (snd_mask_test(format_mask, fmt)) {
1880 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1881 if (f >= 0)
1882 formats |= f;
1883 }
1884 }
1885
1886 error:
1887 kfree(params);
1888 return err < 0 ? err : formats;
1889}
1890
1891static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1892{
1893 int formats, idx;
1894 int err;
1895
1896 if (format != AFMT_QUERY) {
1897 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1898 if (formats < 0)
1899 return formats;
1900 if (!(formats & format))
1901 format = AFMT_U8;
1902 for (idx = 1; idx >= 0; --idx) {
1903 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1904 struct snd_pcm_runtime *runtime;
1905 if (substream == NULL)
1906 continue;
1907 runtime = substream->runtime;
1908 err = lock_params(runtime);
1909 if (err < 0)
1910 return err;
1911 if (runtime->oss.format != format) {
1912 runtime->oss.params = 1;
1913 runtime->oss.format = format;
1914 }
1915 unlock_params(runtime);
1916 }
1917 }
1918 return snd_pcm_oss_get_format(pcm_oss_file);
1919}
1920
1921static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1922{
1923 struct snd_pcm_substream *substream;
1924 int err;
1925
1926 err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
1927 if (err < 0)
1928 return err;
1929 return substream->runtime->oss.format;
1930}
1931
1932static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1933{
1934 struct snd_pcm_runtime *runtime;
1935
1936 runtime = substream->runtime;
1937 if (subdivide == 0) {
1938 subdivide = runtime->oss.subdivision;
1939 if (subdivide == 0)
1940 subdivide = 1;
1941 return subdivide;
1942 }
1943 if (runtime->oss.subdivision || runtime->oss.fragshift)
1944 return -EINVAL;
1945 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1946 subdivide != 8 && subdivide != 16)
1947 return -EINVAL;
1948 runtime->oss.subdivision = subdivide;
1949 runtime->oss.params = 1;
1950 return subdivide;
1951}
1952
1953static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1954{
1955 int err = -EINVAL, idx;
1956
1957 for (idx = 1; idx >= 0; --idx) {
1958 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1959 struct snd_pcm_runtime *runtime;
1960
1961 if (substream == NULL)
1962 continue;
1963 runtime = substream->runtime;
1964 err = lock_params(runtime);
1965 if (err < 0)
1966 return err;
1967 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1968 unlock_params(runtime);
1969 if (err < 0)
1970 return err;
1971 }
1972 return err;
1973}
1974
1975static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1976{
1977 struct snd_pcm_runtime *runtime;
1978 int fragshift;
1979
1980 runtime = substream->runtime;
1981 if (runtime->oss.subdivision || runtime->oss.fragshift)
1982 return -EINVAL;
1983 fragshift = val & 0xffff;
1984 if (fragshift >= 25) /* should be large enough */
1985 return -EINVAL;
1986 runtime->oss.fragshift = fragshift;
1987 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1988 if (runtime->oss.fragshift < 4) /* < 16 */
1989 runtime->oss.fragshift = 4;
1990 if (runtime->oss.maxfrags < 2)
1991 runtime->oss.maxfrags = 2;
1992 runtime->oss.params = 1;
1993 return 0;
1994}
1995
1996static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1997{
1998 int err = -EINVAL, idx;
1999
2000 for (idx = 1; idx >= 0; --idx) {
2001 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2002 struct snd_pcm_runtime *runtime;
2003
2004 if (substream == NULL)
2005 continue;
2006 runtime = substream->runtime;
2007 err = lock_params(runtime);
2008 if (err < 0)
2009 return err;
2010 err = snd_pcm_oss_set_fragment1(substream, val);
2011 unlock_params(runtime);
2012 if (err < 0)
2013 return err;
2014 }
2015 return err;
2016}
2017
2018static int snd_pcm_oss_nonblock(struct file * file)
2019{
2020 spin_lock(&file->f_lock);
2021 file->f_flags |= O_NONBLOCK;
2022 spin_unlock(&file->f_lock);
2023 return 0;
2024}
2025
2026static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
2027{
2028
2029 if (substream == NULL) {
2030 res &= ~DSP_CAP_DUPLEX;
2031 return res;
2032 }
2033#ifdef DSP_CAP_MULTI
2034 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2035 if (substream->pstr->substream_count > 1)
2036 res |= DSP_CAP_MULTI;
2037#endif
2038 /* DSP_CAP_REALTIME is set all times: */
2039 /* all ALSA drivers can return actual pointer in ring buffer */
2040#if defined(DSP_CAP_REALTIME) && 0
2041 {
2042 struct snd_pcm_runtime *runtime = substream->runtime;
2043 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2044 res &= ~DSP_CAP_REALTIME;
2045 }
2046#endif
2047 return res;
2048}
2049
2050static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2051{
2052 int result, idx;
2053
2054 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2055 for (idx = 0; idx < 2; idx++) {
2056 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2057 result = snd_pcm_oss_get_caps1(substream, result);
2058 }
2059 result |= 0x0001; /* revision - same as SB AWE 64 */
2060 return result;
2061}
2062
2063static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2064 snd_pcm_uframes_t hw_ptr)
2065{
2066 struct snd_pcm_runtime *runtime = substream->runtime;
2067 snd_pcm_uframes_t appl_ptr;
2068 appl_ptr = hw_ptr + runtime->buffer_size;
2069 appl_ptr %= runtime->boundary;
2070 runtime->control->appl_ptr = appl_ptr;
2071}
2072
2073static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2074{
2075 struct snd_pcm_runtime *runtime;
2076 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2077 int err, cmd;
2078
2079#ifdef OSS_DEBUG
2080 pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
2081#endif
2082
2083 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2084 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2085
2086 if (psubstream) {
2087 err = snd_pcm_oss_make_ready(psubstream);
2088 if (err < 0)
2089 return err;
2090 }
2091 if (csubstream) {
2092 err = snd_pcm_oss_make_ready(csubstream);
2093 if (err < 0)
2094 return err;
2095 }
2096 if (psubstream) {
2097 runtime = psubstream->runtime;
2098 cmd = 0;
2099 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2100 return -ERESTARTSYS;
2101 if (trigger & PCM_ENABLE_OUTPUT) {
2102 if (runtime->oss.trigger)
2103 goto _skip1;
2104 if (atomic_read(&psubstream->mmap_count))
2105 snd_pcm_oss_simulate_fill(psubstream,
2106 get_hw_ptr_period(runtime));
2107 runtime->oss.trigger = 1;
2108 runtime->start_threshold = 1;
2109 cmd = SNDRV_PCM_IOCTL_START;
2110 } else {
2111 if (!runtime->oss.trigger)
2112 goto _skip1;
2113 runtime->oss.trigger = 0;
2114 runtime->start_threshold = runtime->boundary;
2115 cmd = SNDRV_PCM_IOCTL_DROP;
2116 runtime->oss.prepare = 1;
2117 }
2118 _skip1:
2119 mutex_unlock(&runtime->oss.params_lock);
2120 if (cmd) {
2121 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2122 if (err < 0)
2123 return err;
2124 }
2125 }
2126 if (csubstream) {
2127 runtime = csubstream->runtime;
2128 cmd = 0;
2129 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2130 return -ERESTARTSYS;
2131 if (trigger & PCM_ENABLE_INPUT) {
2132 if (runtime->oss.trigger)
2133 goto _skip2;
2134 runtime->oss.trigger = 1;
2135 runtime->start_threshold = 1;
2136 cmd = SNDRV_PCM_IOCTL_START;
2137 } else {
2138 if (!runtime->oss.trigger)
2139 goto _skip2;
2140 runtime->oss.trigger = 0;
2141 runtime->start_threshold = runtime->boundary;
2142 cmd = SNDRV_PCM_IOCTL_DROP;
2143 runtime->oss.prepare = 1;
2144 }
2145 _skip2:
2146 mutex_unlock(&runtime->oss.params_lock);
2147 if (cmd) {
2148 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2149 if (err < 0)
2150 return err;
2151 }
2152 }
2153 return 0;
2154}
2155
2156static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2157{
2158 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2159 int result = 0;
2160
2161 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2162 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2163 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2164 result |= PCM_ENABLE_OUTPUT;
2165 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2166 result |= PCM_ENABLE_INPUT;
2167 return result;
2168}
2169
2170static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2171{
2172 struct snd_pcm_substream *substream;
2173 struct snd_pcm_runtime *runtime;
2174 snd_pcm_sframes_t delay;
2175 int err;
2176
2177 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2178 if (substream == NULL)
2179 return -EINVAL;
2180 err = snd_pcm_oss_make_ready(substream);
2181 if (err < 0)
2182 return err;
2183 runtime = substream->runtime;
2184 if (runtime->oss.params || runtime->oss.prepare)
2185 return 0;
2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2187 if (err == -EPIPE)
2188 delay = 0; /* hack for broken OSS applications */
2189 else if (err < 0)
2190 return err;
2191 return snd_pcm_oss_bytes(substream, delay);
2192}
2193
2194static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2195{
2196 struct snd_pcm_substream *substream;
2197 struct snd_pcm_runtime *runtime;
2198 snd_pcm_sframes_t delay;
2199 int fixup;
2200 struct count_info info;
2201 int err;
2202
2203 if (_info == NULL)
2204 return -EFAULT;
2205 substream = pcm_oss_file->streams[stream];
2206 if (substream == NULL)
2207 return -EINVAL;
2208 err = snd_pcm_oss_make_ready(substream);
2209 if (err < 0)
2210 return err;
2211 runtime = substream->runtime;
2212 if (runtime->oss.params || runtime->oss.prepare) {
2213 memset(&info, 0, sizeof(info));
2214 if (copy_to_user(_info, &info, sizeof(info)))
2215 return -EFAULT;
2216 return 0;
2217 }
2218 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2219 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2220 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2221 err = 0;
2222 delay = 0;
2223 fixup = 0;
2224 } else {
2225 fixup = runtime->oss.buffer_used;
2226 }
2227 } else {
2228 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2229 fixup = -runtime->oss.buffer_used;
2230 }
2231 if (err < 0)
2232 return err;
2233 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2234 if (atomic_read(&substream->mmap_count)) {
2235 snd_pcm_sframes_t n;
2236 delay = get_hw_ptr_period(runtime);
2237 n = delay - runtime->oss.prev_hw_ptr_period;
2238 if (n < 0)
2239 n += runtime->boundary;
2240 info.blocks = n / runtime->period_size;
2241 runtime->oss.prev_hw_ptr_period = delay;
2242 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2243 snd_pcm_oss_simulate_fill(substream, delay);
2244 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2245 } else {
2246 delay = snd_pcm_oss_bytes(substream, delay);
2247 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2248 if (substream->oss.setup.buggyptr)
2249 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2250 else
2251 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2252 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2253 } else {
2254 delay += fixup;
2255 info.blocks = delay / runtime->oss.period_bytes;
2256 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2257 }
2258 }
2259 if (copy_to_user(_info, &info, sizeof(info)))
2260 return -EFAULT;
2261 return 0;
2262}
2263
2264static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2265{
2266 struct snd_pcm_substream *substream;
2267 struct snd_pcm_runtime *runtime;
2268 snd_pcm_sframes_t avail;
2269 int fixup;
2270 struct audio_buf_info info;
2271 int err;
2272
2273 if (_info == NULL)
2274 return -EFAULT;
2275 substream = pcm_oss_file->streams[stream];
2276 if (substream == NULL)
2277 return -EINVAL;
2278 runtime = substream->runtime;
2279
2280 if (runtime->oss.params) {
2281 err = snd_pcm_oss_change_params(substream, false);
2282 if (err < 0)
2283 return err;
2284 }
2285
2286 info.fragsize = runtime->oss.period_bytes;
2287 info.fragstotal = runtime->periods;
2288 if (runtime->oss.prepare) {
2289 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2290 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2291 info.fragments = runtime->oss.periods;
2292 } else {
2293 info.bytes = 0;
2294 info.fragments = 0;
2295 }
2296 } else {
2297 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2298 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2299 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2300 avail = runtime->buffer_size;
2301 err = 0;
2302 fixup = 0;
2303 } else {
2304 avail = runtime->buffer_size - avail;
2305 fixup = -runtime->oss.buffer_used;
2306 }
2307 } else {
2308 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2309 fixup = runtime->oss.buffer_used;
2310 }
2311 if (err < 0)
2312 return err;
2313 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2314 info.fragments = info.bytes / runtime->oss.period_bytes;
2315 }
2316
2317#ifdef OSS_DEBUG
2318 pcm_dbg(substream->pcm,
2319 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2320 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2321#endif
2322 if (copy_to_user(_info, &info, sizeof(info)))
2323 return -EFAULT;
2324 return 0;
2325}
2326
2327static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2328{
2329 // it won't be probably implemented
2330 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2331 return -EINVAL;
2332}
2333
2334static const char *strip_task_path(const char *path)
2335{
2336 const char *ptr, *ptrl = NULL;
2337 for (ptr = path; *ptr; ptr++) {
2338 if (*ptr == '/')
2339 ptrl = ptr + 1;
2340 }
2341 return ptrl;
2342}
2343
2344static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2345 const char *task_name,
2346 struct snd_pcm_oss_setup *rsetup)
2347{
2348 struct snd_pcm_oss_setup *setup;
2349
2350 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2351 do {
2352 for (setup = pcm->streams[stream].oss.setup_list; setup;
2353 setup = setup->next) {
2354 if (!strcmp(setup->task_name, task_name))
2355 goto out;
2356 }
2357 } while ((task_name = strip_task_path(task_name)) != NULL);
2358 out:
2359 if (setup)
2360 *rsetup = *setup;
2361 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2362}
2363
2364static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2365{
2366 snd_pcm_oss_release_buffers(substream);
2367 substream->oss.oss = 0;
2368}
2369
2370static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2371 struct snd_pcm_oss_setup *setup,
2372 int minor)
2373{
2374 struct snd_pcm_runtime *runtime;
2375
2376 substream->oss.oss = 1;
2377 substream->oss.setup = *setup;
2378 if (setup->nonblock)
2379 substream->f_flags |= O_NONBLOCK;
2380 else if (setup->block)
2381 substream->f_flags &= ~O_NONBLOCK;
2382 runtime = substream->runtime;
2383 runtime->oss.params = 1;
2384 runtime->oss.trigger = 1;
2385 runtime->oss.rate = 8000;
2386 mutex_init(&runtime->oss.params_lock);
2387 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2388 case SNDRV_MINOR_OSS_PCM_8:
2389 runtime->oss.format = AFMT_U8;
2390 break;
2391 case SNDRV_MINOR_OSS_PCM_16:
2392 runtime->oss.format = AFMT_S16_LE;
2393 break;
2394 default:
2395 runtime->oss.format = AFMT_MU_LAW;
2396 }
2397 runtime->oss.channels = 1;
2398 runtime->oss.fragshift = 0;
2399 runtime->oss.maxfrags = 0;
2400 runtime->oss.subdivision = 0;
2401 substream->pcm_release = snd_pcm_oss_release_substream;
2402 atomic_set(&runtime->oss.rw_ref, 0);
2403}
2404
2405static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2406{
2407 int cidx;
2408 if (!pcm_oss_file)
2409 return 0;
2410 for (cidx = 0; cidx < 2; ++cidx) {
2411 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2412 if (substream)
2413 snd_pcm_release_substream(substream);
2414 }
2415 kfree(pcm_oss_file);
2416 return 0;
2417}
2418
2419static int snd_pcm_oss_open_file(struct file *file,
2420 struct snd_pcm *pcm,
2421 struct snd_pcm_oss_file **rpcm_oss_file,
2422 int minor,
2423 struct snd_pcm_oss_setup *setup)
2424{
2425 int idx, err;
2426 struct snd_pcm_oss_file *pcm_oss_file;
2427 struct snd_pcm_substream *substream;
2428 fmode_t f_mode = file->f_mode;
2429
2430 if (rpcm_oss_file)
2431 *rpcm_oss_file = NULL;
2432
2433 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2434 if (pcm_oss_file == NULL)
2435 return -ENOMEM;
2436
2437 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2438 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2439 f_mode = FMODE_WRITE;
2440
2441 file->f_flags &= ~O_APPEND;
2442 for (idx = 0; idx < 2; idx++) {
2443 if (setup[idx].disable)
2444 continue;
2445 if (! pcm->streams[idx].substream_count)
2446 continue; /* no matching substream */
2447 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2448 if (! (f_mode & FMODE_WRITE))
2449 continue;
2450 } else {
2451 if (! (f_mode & FMODE_READ))
2452 continue;
2453 }
2454 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2455 if (err < 0) {
2456 snd_pcm_oss_release_file(pcm_oss_file);
2457 return err;
2458 }
2459
2460 pcm_oss_file->streams[idx] = substream;
2461 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2462 }
2463
2464 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2465 snd_pcm_oss_release_file(pcm_oss_file);
2466 return -EINVAL;
2467 }
2468
2469 file->private_data = pcm_oss_file;
2470 if (rpcm_oss_file)
2471 *rpcm_oss_file = pcm_oss_file;
2472 return 0;
2473}
2474
2475
2476static int snd_task_name(struct task_struct *task, char *name, size_t size)
2477{
2478 unsigned int idx;
2479
2480 if (snd_BUG_ON(!task || !name || size < 2))
2481 return -EINVAL;
2482 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2483 name[idx] = task->comm[idx];
2484 name[idx] = '\0';
2485 return 0;
2486}
2487
2488static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2489{
2490 int err;
2491 char task_name[32];
2492 struct snd_pcm *pcm;
2493 struct snd_pcm_oss_file *pcm_oss_file;
2494 struct snd_pcm_oss_setup setup[2];
2495 int nonblock;
2496 wait_queue_entry_t wait;
2497
2498 err = nonseekable_open(inode, file);
2499 if (err < 0)
2500 return err;
2501
2502 pcm = snd_lookup_oss_minor_data(iminor(inode),
2503 SNDRV_OSS_DEVICE_TYPE_PCM);
2504 if (pcm == NULL) {
2505 err = -ENODEV;
2506 goto __error1;
2507 }
2508 err = snd_card_file_add(pcm->card, file);
2509 if (err < 0)
2510 goto __error1;
2511 if (!try_module_get(pcm->card->module)) {
2512 err = -EFAULT;
2513 goto __error2;
2514 }
2515 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2516 err = -EFAULT;
2517 goto __error;
2518 }
2519 memset(setup, 0, sizeof(setup));
2520 if (file->f_mode & FMODE_WRITE)
2521 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2522 task_name, &setup[0]);
2523 if (file->f_mode & FMODE_READ)
2524 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2525 task_name, &setup[1]);
2526
2527 nonblock = !!(file->f_flags & O_NONBLOCK);
2528 if (!nonblock)
2529 nonblock = nonblock_open;
2530
2531 init_waitqueue_entry(&wait, current);
2532 add_wait_queue(&pcm->open_wait, &wait);
2533 mutex_lock(&pcm->open_mutex);
2534 while (1) {
2535 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2536 iminor(inode), setup);
2537 if (err >= 0)
2538 break;
2539 if (err == -EAGAIN) {
2540 if (nonblock) {
2541 err = -EBUSY;
2542 break;
2543 }
2544 } else
2545 break;
2546 set_current_state(TASK_INTERRUPTIBLE);
2547 mutex_unlock(&pcm->open_mutex);
2548 schedule();
2549 mutex_lock(&pcm->open_mutex);
2550 if (pcm->card->shutdown) {
2551 err = -ENODEV;
2552 break;
2553 }
2554 if (signal_pending(current)) {
2555 err = -ERESTARTSYS;
2556 break;
2557 }
2558 }
2559 remove_wait_queue(&pcm->open_wait, &wait);
2560 mutex_unlock(&pcm->open_mutex);
2561 if (err < 0)
2562 goto __error;
2563 snd_card_unref(pcm->card);
2564 return err;
2565
2566 __error:
2567 module_put(pcm->card->module);
2568 __error2:
2569 snd_card_file_remove(pcm->card, file);
2570 __error1:
2571 if (pcm)
2572 snd_card_unref(pcm->card);
2573 return err;
2574}
2575
2576static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2577{
2578 struct snd_pcm *pcm;
2579 struct snd_pcm_substream *substream;
2580 struct snd_pcm_oss_file *pcm_oss_file;
2581
2582 pcm_oss_file = file->private_data;
2583 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2584 if (substream == NULL)
2585 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2586 if (snd_BUG_ON(!substream))
2587 return -ENXIO;
2588 pcm = substream->pcm;
2589 if (!pcm->card->shutdown)
2590 snd_pcm_oss_sync(pcm_oss_file);
2591 mutex_lock(&pcm->open_mutex);
2592 snd_pcm_oss_release_file(pcm_oss_file);
2593 mutex_unlock(&pcm->open_mutex);
2594 wake_up(&pcm->open_wait);
2595 module_put(pcm->card->module);
2596 snd_card_file_remove(pcm->card, file);
2597 return 0;
2598}
2599
2600static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2601{
2602 struct snd_pcm_oss_file *pcm_oss_file;
2603 int __user *p = (int __user *)arg;
2604 int res;
2605
2606 pcm_oss_file = file->private_data;
2607 if (cmd == OSS_GETVERSION)
2608 return put_user(SNDRV_OSS_VERSION, p);
2609 if (cmd == OSS_ALSAEMULVER)
2610 return put_user(1, p);
2611#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2612 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2613 struct snd_pcm_substream *substream;
2614 int idx;
2615 for (idx = 0; idx < 2; ++idx) {
2616 substream = pcm_oss_file->streams[idx];
2617 if (substream != NULL)
2618 break;
2619 }
2620 if (snd_BUG_ON(idx >= 2))
2621 return -ENXIO;
2622 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2623 }
2624#endif
2625 if (((cmd >> 8) & 0xff) != 'P')
2626 return -EINVAL;
2627#ifdef OSS_DEBUG
2628 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2629#endif
2630 switch (cmd) {
2631 case SNDCTL_DSP_RESET:
2632 return snd_pcm_oss_reset(pcm_oss_file);
2633 case SNDCTL_DSP_SYNC:
2634 return snd_pcm_oss_sync(pcm_oss_file);
2635 case SNDCTL_DSP_SPEED:
2636 if (get_user(res, p))
2637 return -EFAULT;
2638 res = snd_pcm_oss_set_rate(pcm_oss_file, res);
2639 if (res < 0)
2640 return res;
2641 return put_user(res, p);
2642 case SOUND_PCM_READ_RATE:
2643 res = snd_pcm_oss_get_rate(pcm_oss_file);
2644 if (res < 0)
2645 return res;
2646 return put_user(res, p);
2647 case SNDCTL_DSP_STEREO:
2648 if (get_user(res, p))
2649 return -EFAULT;
2650 res = res > 0 ? 2 : 1;
2651 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2652 if (res < 0)
2653 return res;
2654 return put_user(--res, p);
2655 case SNDCTL_DSP_GETBLKSIZE:
2656 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2657 if (res < 0)
2658 return res;
2659 return put_user(res, p);
2660 case SNDCTL_DSP_SETFMT:
2661 if (get_user(res, p))
2662 return -EFAULT;
2663 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2664 if (res < 0)
2665 return res;
2666 return put_user(res, p);
2667 case SOUND_PCM_READ_BITS:
2668 res = snd_pcm_oss_get_format(pcm_oss_file);
2669 if (res < 0)
2670 return res;
2671 return put_user(res, p);
2672 case SNDCTL_DSP_CHANNELS:
2673 if (get_user(res, p))
2674 return -EFAULT;
2675 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2676 if (res < 0)
2677 return res;
2678 return put_user(res, p);
2679 case SOUND_PCM_READ_CHANNELS:
2680 res = snd_pcm_oss_get_channels(pcm_oss_file);
2681 if (res < 0)
2682 return res;
2683 return put_user(res, p);
2684 case SOUND_PCM_WRITE_FILTER:
2685 case SOUND_PCM_READ_FILTER:
2686 return -EIO;
2687 case SNDCTL_DSP_POST:
2688 return snd_pcm_oss_post(pcm_oss_file);
2689 case SNDCTL_DSP_SUBDIVIDE:
2690 if (get_user(res, p))
2691 return -EFAULT;
2692 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2693 if (res < 0)
2694 return res;
2695 return put_user(res, p);
2696 case SNDCTL_DSP_SETFRAGMENT:
2697 if (get_user(res, p))
2698 return -EFAULT;
2699 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2700 case SNDCTL_DSP_GETFMTS:
2701 res = snd_pcm_oss_get_formats(pcm_oss_file);
2702 if (res < 0)
2703 return res;
2704 return put_user(res, p);
2705 case SNDCTL_DSP_GETOSPACE:
2706 case SNDCTL_DSP_GETISPACE:
2707 return snd_pcm_oss_get_space(pcm_oss_file,
2708 cmd == SNDCTL_DSP_GETISPACE ?
2709 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2710 (struct audio_buf_info __user *) arg);
2711 case SNDCTL_DSP_NONBLOCK:
2712 return snd_pcm_oss_nonblock(file);
2713 case SNDCTL_DSP_GETCAPS:
2714 res = snd_pcm_oss_get_caps(pcm_oss_file);
2715 if (res < 0)
2716 return res;
2717 return put_user(res, p);
2718 case SNDCTL_DSP_GETTRIGGER:
2719 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2720 if (res < 0)
2721 return res;
2722 return put_user(res, p);
2723 case SNDCTL_DSP_SETTRIGGER:
2724 if (get_user(res, p))
2725 return -EFAULT;
2726 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2727 case SNDCTL_DSP_GETIPTR:
2728 case SNDCTL_DSP_GETOPTR:
2729 return snd_pcm_oss_get_ptr(pcm_oss_file,
2730 cmd == SNDCTL_DSP_GETIPTR ?
2731 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2732 (struct count_info __user *) arg);
2733 case SNDCTL_DSP_MAPINBUF:
2734 case SNDCTL_DSP_MAPOUTBUF:
2735 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2736 cmd == SNDCTL_DSP_MAPINBUF ?
2737 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2738 (struct buffmem_desc __user *) arg);
2739 case SNDCTL_DSP_SETSYNCRO:
2740 /* stop DMA now.. */
2741 return 0;
2742 case SNDCTL_DSP_SETDUPLEX:
2743 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2744 return 0;
2745 return -EIO;
2746 case SNDCTL_DSP_GETODELAY:
2747 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2748 if (res < 0) {
2749 /* it's for sure, some broken apps don't check for error codes */
2750 put_user(0, p);
2751 return res;
2752 }
2753 return put_user(res, p);
2754 case SNDCTL_DSP_PROFILE:
2755 return 0; /* silently ignore */
2756 default:
2757 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2758 }
2759 return -EINVAL;
2760}
2761
2762#ifdef CONFIG_COMPAT
2763/* all compatible */
2764static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2765 unsigned long arg)
2766{
2767 /*
2768 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2769 * which are not implemented for the native case either
2770 */
2771 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2772}
2773#else
2774#define snd_pcm_oss_ioctl_compat NULL
2775#endif
2776
2777static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2778{
2779 struct snd_pcm_oss_file *pcm_oss_file;
2780 struct snd_pcm_substream *substream;
2781
2782 pcm_oss_file = file->private_data;
2783 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2784 if (substream == NULL)
2785 return -ENXIO;
2786 substream->f_flags = file->f_flags & O_NONBLOCK;
2787#ifndef OSS_DEBUG
2788 return snd_pcm_oss_read1(substream, buf, count);
2789#else
2790 {
2791 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2792 pcm_dbg(substream->pcm,
2793 "pcm_oss: read %li bytes (returned %li bytes)\n",
2794 (long)count, (long)res);
2795 return res;
2796 }
2797#endif
2798}
2799
2800static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2801{
2802 struct snd_pcm_oss_file *pcm_oss_file;
2803 struct snd_pcm_substream *substream;
2804 long result;
2805
2806 pcm_oss_file = file->private_data;
2807 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2808 if (substream == NULL)
2809 return -ENXIO;
2810 substream->f_flags = file->f_flags & O_NONBLOCK;
2811 result = snd_pcm_oss_write1(substream, buf, count);
2812#ifdef OSS_DEBUG
2813 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2814 (long)count, (long)result);
2815#endif
2816 return result;
2817}
2818
2819static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2820{
2821 struct snd_pcm_runtime *runtime = substream->runtime;
2822 if (atomic_read(&substream->mmap_count))
2823 return runtime->oss.prev_hw_ptr_period !=
2824 get_hw_ptr_period(runtime);
2825 else
2826 return snd_pcm_playback_avail(runtime) >=
2827 runtime->oss.period_frames;
2828}
2829
2830static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2831{
2832 struct snd_pcm_runtime *runtime = substream->runtime;
2833 if (atomic_read(&substream->mmap_count))
2834 return runtime->oss.prev_hw_ptr_period !=
2835 get_hw_ptr_period(runtime);
2836 else
2837 return snd_pcm_capture_avail(runtime) >=
2838 runtime->oss.period_frames;
2839}
2840
2841static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2842{
2843 struct snd_pcm_oss_file *pcm_oss_file;
2844 __poll_t mask;
2845 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2846
2847 pcm_oss_file = file->private_data;
2848
2849 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2850 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2851
2852 mask = 0;
2853 if (psubstream != NULL) {
2854 struct snd_pcm_runtime *runtime = psubstream->runtime;
2855 poll_wait(file, &runtime->sleep, wait);
2856 snd_pcm_stream_lock_irq(psubstream);
2857 if (runtime->state != SNDRV_PCM_STATE_DRAINING &&
2858 (runtime->state != SNDRV_PCM_STATE_RUNNING ||
2859 snd_pcm_oss_playback_ready(psubstream)))
2860 mask |= EPOLLOUT | EPOLLWRNORM;
2861 snd_pcm_stream_unlock_irq(psubstream);
2862 }
2863 if (csubstream != NULL) {
2864 struct snd_pcm_runtime *runtime = csubstream->runtime;
2865 snd_pcm_state_t ostate;
2866 poll_wait(file, &runtime->sleep, wait);
2867 snd_pcm_stream_lock_irq(csubstream);
2868 ostate = runtime->state;
2869 if (ostate != SNDRV_PCM_STATE_RUNNING ||
2870 snd_pcm_oss_capture_ready(csubstream))
2871 mask |= EPOLLIN | EPOLLRDNORM;
2872 snd_pcm_stream_unlock_irq(csubstream);
2873 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2874 struct snd_pcm_oss_file ofile;
2875 memset(&ofile, 0, sizeof(ofile));
2876 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2877 runtime->oss.trigger = 0;
2878 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2879 }
2880 }
2881
2882 return mask;
2883}
2884
2885static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2886{
2887 struct snd_pcm_oss_file *pcm_oss_file;
2888 struct snd_pcm_substream *substream = NULL;
2889 struct snd_pcm_runtime *runtime;
2890 int err;
2891
2892#ifdef OSS_DEBUG
2893 pr_debug("pcm_oss: mmap begin\n");
2894#endif
2895 pcm_oss_file = file->private_data;
2896 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2897 case VM_READ | VM_WRITE:
2898 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2899 if (substream)
2900 break;
2901 fallthrough;
2902 case VM_READ:
2903 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2904 break;
2905 case VM_WRITE:
2906 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2907 break;
2908 default:
2909 return -EINVAL;
2910 }
2911 /* set VM_READ access as well to fix memset() routines that do
2912 reads before writes (to improve performance) */
2913 area->vm_flags |= VM_READ;
2914 if (substream == NULL)
2915 return -ENXIO;
2916 runtime = substream->runtime;
2917 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2918 return -EIO;
2919 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2920 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2921 else
2922 return -EIO;
2923
2924 if (runtime->oss.params) {
2925 /* use mutex_trylock() for params_lock for avoiding a deadlock
2926 * between mmap_lock and params_lock taken by
2927 * copy_from/to_user() in snd_pcm_oss_write/read()
2928 */
2929 err = snd_pcm_oss_change_params(substream, true);
2930 if (err < 0)
2931 return err;
2932 }
2933#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2934 if (runtime->oss.plugin_first != NULL)
2935 return -EIO;
2936#endif
2937
2938 if (area->vm_pgoff != 0)
2939 return -EINVAL;
2940
2941 err = snd_pcm_mmap_data(substream, file, area);
2942 if (err < 0)
2943 return err;
2944 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2945 runtime->silence_threshold = 0;
2946 runtime->silence_size = 0;
2947#ifdef OSS_DEBUG
2948 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2949 runtime->oss.mmap_bytes);
2950#endif
2951 /* In mmap mode we never stop */
2952 runtime->stop_threshold = runtime->boundary;
2953
2954 return 0;
2955}
2956
2957#ifdef CONFIG_SND_VERBOSE_PROCFS
2958/*
2959 * /proc interface
2960 */
2961
2962static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2963 struct snd_info_buffer *buffer)
2964{
2965 struct snd_pcm_str *pstr = entry->private_data;
2966 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2967 mutex_lock(&pstr->oss.setup_mutex);
2968 while (setup) {
2969 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2970 setup->task_name,
2971 setup->periods,
2972 setup->period_size,
2973 setup->disable ? " disable" : "",
2974 setup->direct ? " direct" : "",
2975 setup->block ? " block" : "",
2976 setup->nonblock ? " non-block" : "",
2977 setup->partialfrag ? " partial-frag" : "",
2978 setup->nosilence ? " no-silence" : "");
2979 setup = setup->next;
2980 }
2981 mutex_unlock(&pstr->oss.setup_mutex);
2982}
2983
2984static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2985{
2986 struct snd_pcm_oss_setup *setup, *setupn;
2987
2988 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2989 setup; setup = setupn) {
2990 setupn = setup->next;
2991 kfree(setup->task_name);
2992 kfree(setup);
2993 }
2994 pstr->oss.setup_list = NULL;
2995}
2996
2997static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2998 struct snd_info_buffer *buffer)
2999{
3000 struct snd_pcm_str *pstr = entry->private_data;
3001 char line[128], str[32], task_name[32];
3002 const char *ptr;
3003 int idx1;
3004 struct snd_pcm_oss_setup *setup, *setup1, template;
3005
3006 while (!snd_info_get_line(buffer, line, sizeof(line))) {
3007 mutex_lock(&pstr->oss.setup_mutex);
3008 memset(&template, 0, sizeof(template));
3009 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
3010 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
3011 snd_pcm_oss_proc_free_setup_list(pstr);
3012 mutex_unlock(&pstr->oss.setup_mutex);
3013 continue;
3014 }
3015 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
3016 if (!strcmp(setup->task_name, task_name)) {
3017 template = *setup;
3018 break;
3019 }
3020 }
3021 ptr = snd_info_get_str(str, ptr, sizeof(str));
3022 template.periods = simple_strtoul(str, NULL, 10);
3023 ptr = snd_info_get_str(str, ptr, sizeof(str));
3024 template.period_size = simple_strtoul(str, NULL, 10);
3025 for (idx1 = 31; idx1 >= 0; idx1--)
3026 if (template.period_size & (1 << idx1))
3027 break;
3028 for (idx1--; idx1 >= 0; idx1--)
3029 template.period_size &= ~(1 << idx1);
3030 do {
3031 ptr = snd_info_get_str(str, ptr, sizeof(str));
3032 if (!strcmp(str, "disable")) {
3033 template.disable = 1;
3034 } else if (!strcmp(str, "direct")) {
3035 template.direct = 1;
3036 } else if (!strcmp(str, "block")) {
3037 template.block = 1;
3038 } else if (!strcmp(str, "non-block")) {
3039 template.nonblock = 1;
3040 } else if (!strcmp(str, "partial-frag")) {
3041 template.partialfrag = 1;
3042 } else if (!strcmp(str, "no-silence")) {
3043 template.nosilence = 1;
3044 } else if (!strcmp(str, "buggy-ptr")) {
3045 template.buggyptr = 1;
3046 }
3047 } while (*str);
3048 if (setup == NULL) {
3049 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3050 if (! setup) {
3051 buffer->error = -ENOMEM;
3052 mutex_unlock(&pstr->oss.setup_mutex);
3053 return;
3054 }
3055 if (pstr->oss.setup_list == NULL)
3056 pstr->oss.setup_list = setup;
3057 else {
3058 for (setup1 = pstr->oss.setup_list;
3059 setup1->next; setup1 = setup1->next);
3060 setup1->next = setup;
3061 }
3062 template.task_name = kstrdup(task_name, GFP_KERNEL);
3063 if (! template.task_name) {
3064 kfree(setup);
3065 buffer->error = -ENOMEM;
3066 mutex_unlock(&pstr->oss.setup_mutex);
3067 return;
3068 }
3069 }
3070 *setup = template;
3071 mutex_unlock(&pstr->oss.setup_mutex);
3072 }
3073}
3074
3075static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3076{
3077 int stream;
3078 for (stream = 0; stream < 2; ++stream) {
3079 struct snd_info_entry *entry;
3080 struct snd_pcm_str *pstr = &pcm->streams[stream];
3081 if (pstr->substream_count == 0)
3082 continue;
3083 entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root);
3084 if (entry) {
3085 entry->content = SNDRV_INFO_CONTENT_TEXT;
3086 entry->mode = S_IFREG | 0644;
3087 entry->c.text.read = snd_pcm_oss_proc_read;
3088 entry->c.text.write = snd_pcm_oss_proc_write;
3089 entry->private_data = pstr;
3090 if (snd_info_register(entry) < 0) {
3091 snd_info_free_entry(entry);
3092 entry = NULL;
3093 }
3094 }
3095 pstr->oss.proc_entry = entry;
3096 }
3097}
3098
3099static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3100{
3101 int stream;
3102 for (stream = 0; stream < 2; ++stream) {
3103 struct snd_pcm_str *pstr = &pcm->streams[stream];
3104 snd_info_free_entry(pstr->oss.proc_entry);
3105 pstr->oss.proc_entry = NULL;
3106 snd_pcm_oss_proc_free_setup_list(pstr);
3107 }
3108}
3109#else /* !CONFIG_SND_VERBOSE_PROCFS */
3110static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3111{
3112}
3113static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3114{
3115}
3116#endif /* CONFIG_SND_VERBOSE_PROCFS */
3117
3118/*
3119 * ENTRY functions
3120 */
3121
3122static const struct file_operations snd_pcm_oss_f_reg =
3123{
3124 .owner = THIS_MODULE,
3125 .read = snd_pcm_oss_read,
3126 .write = snd_pcm_oss_write,
3127 .open = snd_pcm_oss_open,
3128 .release = snd_pcm_oss_release,
3129 .llseek = no_llseek,
3130 .poll = snd_pcm_oss_poll,
3131 .unlocked_ioctl = snd_pcm_oss_ioctl,
3132 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3133 .mmap = snd_pcm_oss_mmap,
3134};
3135
3136static void register_oss_dsp(struct snd_pcm *pcm, int index)
3137{
3138 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3139 pcm->card, index, &snd_pcm_oss_f_reg,
3140 pcm) < 0) {
3141 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3142 pcm->card->number, pcm->device);
3143 }
3144}
3145
3146static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3147{
3148 pcm->oss.reg = 0;
3149 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3150 char name[128];
3151 int duplex;
3152 register_oss_dsp(pcm, 0);
3153 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3154 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3155 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3156 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3157#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3158 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3159 pcm->card->number,
3160 name);
3161#endif
3162 pcm->oss.reg++;
3163 pcm->oss.reg_mask |= 1;
3164 }
3165 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3166 register_oss_dsp(pcm, 1);
3167 pcm->oss.reg++;
3168 pcm->oss.reg_mask |= 2;
3169 }
3170
3171 if (pcm->oss.reg)
3172 snd_pcm_oss_proc_init(pcm);
3173
3174 return 0;
3175}
3176
3177static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3178{
3179 if (pcm->oss.reg) {
3180 if (pcm->oss.reg_mask & 1) {
3181 pcm->oss.reg_mask &= ~1;
3182 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3183 pcm->card, 0);
3184 }
3185 if (pcm->oss.reg_mask & 2) {
3186 pcm->oss.reg_mask &= ~2;
3187 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3188 pcm->card, 1);
3189 }
3190 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3191#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3192 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3193#endif
3194 }
3195 pcm->oss.reg = 0;
3196 }
3197 return 0;
3198}
3199
3200static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3201{
3202 snd_pcm_oss_disconnect_minor(pcm);
3203 snd_pcm_oss_proc_done(pcm);
3204 return 0;
3205}
3206
3207static struct snd_pcm_notify snd_pcm_oss_notify =
3208{
3209 .n_register = snd_pcm_oss_register_minor,
3210 .n_disconnect = snd_pcm_oss_disconnect_minor,
3211 .n_unregister = snd_pcm_oss_unregister_minor,
3212};
3213
3214static int __init alsa_pcm_oss_init(void)
3215{
3216 int i;
3217 int err;
3218
3219 /* check device map table */
3220 for (i = 0; i < SNDRV_CARDS; i++) {
3221 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3222 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3223 i, dsp_map[i]);
3224 dsp_map[i] = 0;
3225 }
3226 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3227 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3228 i, adsp_map[i]);
3229 adsp_map[i] = 1;
3230 }
3231 }
3232 err = snd_pcm_notify(&snd_pcm_oss_notify, 0);
3233 if (err < 0)
3234 return err;
3235 return 0;
3236}
3237
3238static void __exit alsa_pcm_oss_exit(void)
3239{
3240 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3241}
3242
3243module_init(alsa_pcm_oss_init)
3244module_exit(alsa_pcm_oss_exit)