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