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