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