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