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