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[mirror_ubuntu-disco-kernel.git] / sound / core / oss / pcm_oss.c
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
49 static int dsp_map[SNDRV_CARDS];
50 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
51 static bool nonblock_open = 1;
52
53 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
54 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
55 MODULE_LICENSE("GPL");
56 module_param_array(dsp_map, int, NULL, 0444);
57 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
58 module_param_array(adsp_map, int, NULL, 0444);
59 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
60 module_param(nonblock_open, bool, 0644);
61 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
64
65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
68
69 static 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
76 static 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 */
84 static 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
108 static 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
132 static 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 */
150 static unsigned int
151 snd_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 */
176 static unsigned int
177 snd_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
194 static 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
207 static 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
223 static 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 */
266 static 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
282 static 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 */
327 static 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
343 static 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
359 static 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 */
376 static 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 */
401 static 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
473 static 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 */
533 static 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
549 static 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
566 static 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
581 static 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
596 int 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
612 static 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
629 static 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
638 static inline
639 snd_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
660 static 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
684 static 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
708 static 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
798 static 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
838 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
839 {
840 struct snd_pcm_runtime *runtime = substream->runtime;
841 struct snd_pcm_hw_params *params, *sparams;
842 struct snd_pcm_sw_params *sw_params;
843 ssize_t oss_buffer_size, oss_period_size;
844 size_t oss_frame_size;
845 int err;
846 int direct;
847 snd_pcm_format_t format, sformat;
848 int n;
849 struct snd_mask sformat_mask;
850 struct snd_mask mask;
851
852 if (mutex_lock_interruptible(&runtime->oss.params_lock))
853 return -EINTR;
854 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
855 params = kmalloc(sizeof(*params), GFP_KERNEL);
856 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
857 if (!sw_params || !params || !sparams) {
858 err = -ENOMEM;
859 goto failure;
860 }
861
862 if (atomic_read(&substream->mmap_count))
863 direct = 1;
864 else
865 direct = substream->oss.setup.direct;
866
867 _snd_pcm_hw_params_any(sparams);
868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
870 snd_mask_none(&mask);
871 if (atomic_read(&substream->mmap_count))
872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
873 else {
874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
875 if (!direct)
876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
877 }
878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879 if (err < 0) {
880 pcm_dbg(substream->pcm, "No usable accesses\n");
881 err = -EINVAL;
882 goto failure;
883 }
884 choose_rate(substream, sparams, runtime->oss.rate);
885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886
887 format = snd_pcm_oss_format_from(runtime->oss.format);
888
889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
890 if (direct)
891 sformat = format;
892 else
893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894
895 if ((__force int)sformat < 0 ||
896 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
897 for (sformat = (__force snd_pcm_format_t)0;
898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
900 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
901 snd_pcm_oss_format_to(sformat) >= 0)
902 break;
903 }
904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
905 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
906 err = -EINVAL;
907 goto failure;
908 }
909 }
910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
911 if (err < 0)
912 goto failure;
913
914 if (direct) {
915 memcpy(params, sparams, sizeof(*params));
916 } else {
917 _snd_pcm_hw_params_any(params);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
923 runtime->oss.channels, 0);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
925 runtime->oss.rate, 0);
926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
927 params_access(params), params_format(params),
928 params_channels(params), params_rate(params));
929 }
930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
931 params_access(sparams), params_format(sparams),
932 params_channels(sparams), params_rate(sparams));
933
934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
935 params_channels(params) / 8;
936
937 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
938 snd_pcm_oss_plugin_clear(substream);
939 if (!direct) {
940 /* add necessary plugins */
941 snd_pcm_oss_plugin_clear(substream);
942 if ((err = snd_pcm_plug_format_plugins(substream,
943 params,
944 sparams)) < 0) {
945 pcm_dbg(substream->pcm,
946 "snd_pcm_plug_format_plugins failed: %i\n", err);
947 snd_pcm_oss_plugin_clear(substream);
948 goto failure;
949 }
950 if (runtime->oss.plugin_first) {
951 struct snd_pcm_plugin *plugin;
952 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
953 pcm_dbg(substream->pcm,
954 "snd_pcm_plugin_build_io failed: %i\n", err);
955 snd_pcm_oss_plugin_clear(substream);
956 goto failure;
957 }
958 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
959 err = snd_pcm_plugin_append(plugin);
960 } else {
961 err = snd_pcm_plugin_insert(plugin);
962 }
963 if (err < 0) {
964 snd_pcm_oss_plugin_clear(substream);
965 goto failure;
966 }
967 }
968 }
969 #endif
970
971 err = snd_pcm_oss_period_size(substream, params, sparams);
972 if (err < 0)
973 goto failure;
974
975 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
976 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
977 if (err < 0)
978 goto failure;
979
980 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
981 runtime->oss.periods, NULL);
982 if (err < 0)
983 goto failure;
984
985 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
986
987 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
988 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
989 goto failure;
990 }
991
992 if (runtime->oss.trigger) {
993 sw_params->start_threshold = 1;
994 } else {
995 sw_params->start_threshold = runtime->boundary;
996 }
997 if (atomic_read(&substream->mmap_count) ||
998 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
999 sw_params->stop_threshold = runtime->boundary;
1000 else
1001 sw_params->stop_threshold = runtime->buffer_size;
1002 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1003 sw_params->period_step = 1;
1004 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1005 1 : runtime->period_size;
1006 if (atomic_read(&substream->mmap_count) ||
1007 substream->oss.setup.nosilence) {
1008 sw_params->silence_threshold = 0;
1009 sw_params->silence_size = 0;
1010 } else {
1011 snd_pcm_uframes_t frames;
1012 frames = runtime->period_size + 16;
1013 if (frames > runtime->buffer_size)
1014 frames = runtime->buffer_size;
1015 sw_params->silence_threshold = frames;
1016 sw_params->silence_size = frames;
1017 }
1018
1019 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1020 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1021 goto failure;
1022 }
1023
1024 runtime->oss.periods = params_periods(sparams);
1025 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1026 if (oss_period_size < 0) {
1027 err = -EINVAL;
1028 goto failure;
1029 }
1030 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1031 if (runtime->oss.plugin_first) {
1032 err = snd_pcm_plug_alloc(substream, oss_period_size);
1033 if (err < 0)
1034 goto failure;
1035 }
1036 #endif
1037 oss_period_size *= oss_frame_size;
1038
1039 oss_buffer_size = oss_period_size * runtime->oss.periods;
1040 if (oss_buffer_size < 0) {
1041 err = -EINVAL;
1042 goto failure;
1043 }
1044
1045 runtime->oss.period_bytes = oss_period_size;
1046 runtime->oss.buffer_bytes = oss_buffer_size;
1047
1048 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1049 runtime->oss.period_bytes,
1050 runtime->oss.buffer_bytes);
1051 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1052 params_period_size(sparams),
1053 params_buffer_size(sparams));
1054
1055 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1056 runtime->oss.channels = params_channels(params);
1057 runtime->oss.rate = params_rate(params);
1058
1059 vfree(runtime->oss.buffer);
1060 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1061 if (!runtime->oss.buffer) {
1062 err = -ENOMEM;
1063 goto failure;
1064 }
1065
1066 runtime->oss.params = 0;
1067 runtime->oss.prepare = 1;
1068 runtime->oss.buffer_used = 0;
1069 if (runtime->dma_area)
1070 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1071
1072 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1073
1074 err = 0;
1075 failure:
1076 kfree(sw_params);
1077 kfree(params);
1078 kfree(sparams);
1079 mutex_unlock(&runtime->oss.params_lock);
1080 return err;
1081 }
1082
1083 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1084 {
1085 int idx, err;
1086 struct snd_pcm_substream *asubstream = NULL, *substream;
1087
1088 for (idx = 0; idx < 2; idx++) {
1089 substream = pcm_oss_file->streams[idx];
1090 if (substream == NULL)
1091 continue;
1092 if (asubstream == NULL)
1093 asubstream = substream;
1094 if (substream->runtime->oss.params) {
1095 err = snd_pcm_oss_change_params(substream);
1096 if (err < 0)
1097 return err;
1098 }
1099 }
1100 if (!asubstream)
1101 return -EIO;
1102 if (r_substream)
1103 *r_substream = asubstream;
1104 return 0;
1105 }
1106
1107 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1108 {
1109 int err;
1110 struct snd_pcm_runtime *runtime = substream->runtime;
1111
1112 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1113 if (err < 0) {
1114 pcm_dbg(substream->pcm,
1115 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1116 return err;
1117 }
1118 runtime->oss.prepare = 0;
1119 runtime->oss.prev_hw_ptr_period = 0;
1120 runtime->oss.period_ptr = 0;
1121 runtime->oss.buffer_used = 0;
1122
1123 return 0;
1124 }
1125
1126 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1127 {
1128 struct snd_pcm_runtime *runtime;
1129 int err;
1130
1131 if (substream == NULL)
1132 return 0;
1133 runtime = substream->runtime;
1134 if (runtime->oss.params) {
1135 err = snd_pcm_oss_change_params(substream);
1136 if (err < 0)
1137 return err;
1138 }
1139 if (runtime->oss.prepare) {
1140 err = snd_pcm_oss_prepare(substream);
1141 if (err < 0)
1142 return err;
1143 }
1144 return 0;
1145 }
1146
1147 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1148 {
1149 struct snd_pcm_runtime *runtime;
1150 snd_pcm_uframes_t frames;
1151 int err = 0;
1152
1153 while (1) {
1154 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1155 if (err < 0)
1156 break;
1157 runtime = substream->runtime;
1158 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1159 break;
1160 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1161 /* until avail(delay) <= buffer_size */
1162 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1163 frames /= runtime->period_size;
1164 frames *= runtime->period_size;
1165 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1166 if (err < 0)
1167 break;
1168 }
1169 return err;
1170 }
1171
1172 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1173 {
1174 struct snd_pcm_runtime *runtime = substream->runtime;
1175 int ret;
1176 while (1) {
1177 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1178 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1179 #ifdef OSS_DEBUG
1180 pcm_dbg(substream->pcm,
1181 "pcm_oss: write: recovering from %s\n",
1182 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1183 "XRUN" : "SUSPEND");
1184 #endif
1185 ret = snd_pcm_oss_prepare(substream);
1186 if (ret < 0)
1187 break;
1188 }
1189 if (in_kernel) {
1190 mm_segment_t fs;
1191 fs = snd_enter_user();
1192 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1193 snd_leave_user(fs);
1194 } else {
1195 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1196 }
1197 if (ret != -EPIPE && ret != -ESTRPIPE)
1198 break;
1199 /* test, if we can't store new data, because the stream */
1200 /* has not been started */
1201 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202 return -EAGAIN;
1203 }
1204 return ret;
1205 }
1206
1207 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208 {
1209 struct snd_pcm_runtime *runtime = substream->runtime;
1210 snd_pcm_sframes_t delay;
1211 int ret;
1212 while (1) {
1213 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215 #ifdef OSS_DEBUG
1216 pcm_dbg(substream->pcm,
1217 "pcm_oss: read: recovering from %s\n",
1218 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1219 "XRUN" : "SUSPEND");
1220 #endif
1221 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1222 if (ret < 0)
1223 break;
1224 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1225 ret = snd_pcm_oss_prepare(substream);
1226 if (ret < 0)
1227 break;
1228 }
1229 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1230 if (ret < 0)
1231 break;
1232 if (in_kernel) {
1233 mm_segment_t fs;
1234 fs = snd_enter_user();
1235 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1236 snd_leave_user(fs);
1237 } else {
1238 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1239 }
1240 if (ret == -EPIPE) {
1241 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1242 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1243 if (ret < 0)
1244 break;
1245 }
1246 continue;
1247 }
1248 if (ret != -ESTRPIPE)
1249 break;
1250 }
1251 return ret;
1252 }
1253
1254 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1255 {
1256 struct snd_pcm_runtime *runtime = substream->runtime;
1257 int ret;
1258 while (1) {
1259 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1260 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1261 #ifdef OSS_DEBUG
1262 pcm_dbg(substream->pcm,
1263 "pcm_oss: writev: recovering from %s\n",
1264 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1265 "XRUN" : "SUSPEND");
1266 #endif
1267 ret = snd_pcm_oss_prepare(substream);
1268 if (ret < 0)
1269 break;
1270 }
1271 if (in_kernel) {
1272 mm_segment_t fs;
1273 fs = snd_enter_user();
1274 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1275 snd_leave_user(fs);
1276 } else {
1277 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1278 }
1279 if (ret != -EPIPE && ret != -ESTRPIPE)
1280 break;
1281
1282 /* test, if we can't store new data, because the stream */
1283 /* has not been started */
1284 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1285 return -EAGAIN;
1286 }
1287 return ret;
1288 }
1289
1290 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1291 {
1292 struct snd_pcm_runtime *runtime = substream->runtime;
1293 int ret;
1294 while (1) {
1295 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1296 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1297 #ifdef OSS_DEBUG
1298 pcm_dbg(substream->pcm,
1299 "pcm_oss: readv: recovering from %s\n",
1300 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1301 "XRUN" : "SUSPEND");
1302 #endif
1303 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1304 if (ret < 0)
1305 break;
1306 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1307 ret = snd_pcm_oss_prepare(substream);
1308 if (ret < 0)
1309 break;
1310 }
1311 if (in_kernel) {
1312 mm_segment_t fs;
1313 fs = snd_enter_user();
1314 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1315 snd_leave_user(fs);
1316 } else {
1317 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1318 }
1319 if (ret != -EPIPE && ret != -ESTRPIPE)
1320 break;
1321 }
1322 return ret;
1323 }
1324
1325 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1326 {
1327 struct snd_pcm_runtime *runtime = substream->runtime;
1328 snd_pcm_sframes_t frames, frames1;
1329 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1330 if (runtime->oss.plugin_first) {
1331 struct snd_pcm_plugin_channel *channels;
1332 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1333 if (!in_kernel) {
1334 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1335 return -EFAULT;
1336 buf = runtime->oss.buffer;
1337 }
1338 frames = bytes / oss_frame_bytes;
1339 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1340 if (frames1 < 0)
1341 return frames1;
1342 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1343 if (frames1 <= 0)
1344 return frames1;
1345 bytes = frames1 * oss_frame_bytes;
1346 } else
1347 #endif
1348 {
1349 frames = bytes_to_frames(runtime, bytes);
1350 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1351 if (frames1 <= 0)
1352 return frames1;
1353 bytes = frames_to_bytes(runtime, frames1);
1354 }
1355 return bytes;
1356 }
1357
1358 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1359 {
1360 size_t xfer = 0;
1361 ssize_t tmp;
1362 struct snd_pcm_runtime *runtime = substream->runtime;
1363
1364 if (atomic_read(&substream->mmap_count))
1365 return -ENXIO;
1366
1367 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1368 return tmp;
1369 mutex_lock(&runtime->oss.params_lock);
1370 while (bytes > 0) {
1371 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1372 tmp = bytes;
1373 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1374 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1375 if (tmp > 0) {
1376 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1377 tmp = -EFAULT;
1378 goto err;
1379 }
1380 }
1381 runtime->oss.buffer_used += tmp;
1382 buf += tmp;
1383 bytes -= tmp;
1384 xfer += tmp;
1385 if (substream->oss.setup.partialfrag ||
1386 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1387 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1388 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1389 if (tmp <= 0)
1390 goto err;
1391 runtime->oss.bytes += tmp;
1392 runtime->oss.period_ptr += tmp;
1393 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1394 if (runtime->oss.period_ptr == 0 ||
1395 runtime->oss.period_ptr == runtime->oss.buffer_used)
1396 runtime->oss.buffer_used = 0;
1397 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1398 tmp = -EAGAIN;
1399 goto err;
1400 }
1401 }
1402 } else {
1403 tmp = snd_pcm_oss_write2(substream,
1404 (const char __force *)buf,
1405 runtime->oss.period_bytes, 0);
1406 if (tmp <= 0)
1407 goto err;
1408 runtime->oss.bytes += tmp;
1409 buf += tmp;
1410 bytes -= tmp;
1411 xfer += tmp;
1412 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1413 tmp != runtime->oss.period_bytes)
1414 break;
1415 }
1416 }
1417 mutex_unlock(&runtime->oss.params_lock);
1418 return xfer;
1419
1420 err:
1421 mutex_unlock(&runtime->oss.params_lock);
1422 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1423 }
1424
1425 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1426 {
1427 struct snd_pcm_runtime *runtime = substream->runtime;
1428 snd_pcm_sframes_t frames, frames1;
1429 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1430 char __user *final_dst = (char __force __user *)buf;
1431 if (runtime->oss.plugin_first) {
1432 struct snd_pcm_plugin_channel *channels;
1433 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1434 if (!in_kernel)
1435 buf = runtime->oss.buffer;
1436 frames = bytes / oss_frame_bytes;
1437 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1438 if (frames1 < 0)
1439 return frames1;
1440 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1441 if (frames1 <= 0)
1442 return frames1;
1443 bytes = frames1 * oss_frame_bytes;
1444 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1445 return -EFAULT;
1446 } else
1447 #endif
1448 {
1449 frames = bytes_to_frames(runtime, bytes);
1450 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1451 if (frames1 <= 0)
1452 return frames1;
1453 bytes = frames_to_bytes(runtime, frames1);
1454 }
1455 return bytes;
1456 }
1457
1458 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1459 {
1460 size_t xfer = 0;
1461 ssize_t tmp;
1462 struct snd_pcm_runtime *runtime = substream->runtime;
1463
1464 if (atomic_read(&substream->mmap_count))
1465 return -ENXIO;
1466
1467 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1468 return tmp;
1469 mutex_lock(&runtime->oss.params_lock);
1470 while (bytes > 0) {
1471 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1472 if (runtime->oss.buffer_used == 0) {
1473 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1474 if (tmp <= 0)
1475 goto err;
1476 runtime->oss.bytes += tmp;
1477 runtime->oss.period_ptr = tmp;
1478 runtime->oss.buffer_used = tmp;
1479 }
1480 tmp = bytes;
1481 if ((size_t) tmp > runtime->oss.buffer_used)
1482 tmp = runtime->oss.buffer_used;
1483 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1484 tmp = -EFAULT;
1485 goto err;
1486 }
1487 buf += tmp;
1488 bytes -= tmp;
1489 xfer += tmp;
1490 runtime->oss.buffer_used -= tmp;
1491 } else {
1492 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1493 runtime->oss.period_bytes, 0);
1494 if (tmp <= 0)
1495 goto err;
1496 runtime->oss.bytes += tmp;
1497 buf += tmp;
1498 bytes -= tmp;
1499 xfer += tmp;
1500 }
1501 }
1502 mutex_unlock(&runtime->oss.params_lock);
1503 return xfer;
1504
1505 err:
1506 mutex_unlock(&runtime->oss.params_lock);
1507 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1508 }
1509
1510 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1511 {
1512 struct snd_pcm_substream *substream;
1513 struct snd_pcm_runtime *runtime;
1514 int i;
1515
1516 for (i = 0; i < 2; i++) {
1517 substream = pcm_oss_file->streams[i];
1518 if (!substream)
1519 continue;
1520 runtime = substream->runtime;
1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1522 runtime->oss.prepare = 1;
1523 runtime->oss.buffer_used = 0;
1524 runtime->oss.prev_hw_ptr_period = 0;
1525 runtime->oss.period_ptr = 0;
1526 }
1527 return 0;
1528 }
1529
1530 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1531 {
1532 struct snd_pcm_substream *substream;
1533 int err;
1534
1535 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1536 if (substream != NULL) {
1537 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1538 return err;
1539 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1540 }
1541 /* note: all errors from the start action are ignored */
1542 /* OSS apps do not know, how to handle them */
1543 return 0;
1544 }
1545
1546 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1547 {
1548 struct snd_pcm_runtime *runtime;
1549 ssize_t result = 0;
1550 snd_pcm_state_t state;
1551 long res;
1552 wait_queue_t wait;
1553
1554 runtime = substream->runtime;
1555 init_waitqueue_entry(&wait, current);
1556 add_wait_queue(&runtime->sleep, &wait);
1557 #ifdef OSS_DEBUG
1558 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1559 #endif
1560 while (1) {
1561 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1562 if (result > 0) {
1563 runtime->oss.buffer_used = 0;
1564 result = 0;
1565 break;
1566 }
1567 if (result != 0 && result != -EAGAIN)
1568 break;
1569 result = 0;
1570 set_current_state(TASK_INTERRUPTIBLE);
1571 snd_pcm_stream_lock_irq(substream);
1572 state = runtime->status->state;
1573 snd_pcm_stream_unlock_irq(substream);
1574 if (state != SNDRV_PCM_STATE_RUNNING) {
1575 set_current_state(TASK_RUNNING);
1576 break;
1577 }
1578 res = schedule_timeout(10 * HZ);
1579 if (signal_pending(current)) {
1580 result = -ERESTARTSYS;
1581 break;
1582 }
1583 if (res == 0) {
1584 pcm_err(substream->pcm,
1585 "OSS sync error - DMA timeout\n");
1586 result = -EIO;
1587 break;
1588 }
1589 }
1590 remove_wait_queue(&runtime->sleep, &wait);
1591 return result;
1592 }
1593
1594 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1595 {
1596 int err = 0;
1597 unsigned int saved_f_flags;
1598 struct snd_pcm_substream *substream;
1599 struct snd_pcm_runtime *runtime;
1600 snd_pcm_format_t format;
1601 unsigned long width;
1602 size_t size;
1603
1604 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1605 if (substream != NULL) {
1606 runtime = substream->runtime;
1607 if (atomic_read(&substream->mmap_count))
1608 goto __direct;
1609 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1610 return err;
1611 format = snd_pcm_oss_format_from(runtime->oss.format);
1612 width = snd_pcm_format_physical_width(format);
1613 mutex_lock(&runtime->oss.params_lock);
1614 if (runtime->oss.buffer_used > 0) {
1615 #ifdef OSS_DEBUG
1616 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1617 #endif
1618 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1619 snd_pcm_format_set_silence(format,
1620 runtime->oss.buffer + runtime->oss.buffer_used,
1621 size);
1622 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1623 if (err < 0) {
1624 mutex_unlock(&runtime->oss.params_lock);
1625 return err;
1626 }
1627 } else if (runtime->oss.period_ptr > 0) {
1628 #ifdef OSS_DEBUG
1629 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1630 #endif
1631 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1632 snd_pcm_format_set_silence(format,
1633 runtime->oss.buffer,
1634 size * 8 / width);
1635 err = snd_pcm_oss_sync1(substream, size);
1636 if (err < 0) {
1637 mutex_unlock(&runtime->oss.params_lock);
1638 return err;
1639 }
1640 }
1641 /*
1642 * The ALSA's period might be a bit large than OSS one.
1643 * Fill the remain portion of ALSA period with zeros.
1644 */
1645 size = runtime->control->appl_ptr % runtime->period_size;
1646 if (size > 0) {
1647 size = runtime->period_size - size;
1648 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1649 size = (runtime->frame_bits * size) / 8;
1650 while (size > 0) {
1651 mm_segment_t fs;
1652 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1653 size -= size1;
1654 size1 *= 8;
1655 size1 /= runtime->sample_bits;
1656 snd_pcm_format_set_silence(runtime->format,
1657 runtime->oss.buffer,
1658 size1);
1659 size1 /= runtime->channels; /* frames */
1660 fs = snd_enter_user();
1661 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1662 snd_leave_user(fs);
1663 }
1664 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1665 void __user *buffers[runtime->channels];
1666 memset(buffers, 0, runtime->channels * sizeof(void *));
1667 snd_pcm_lib_writev(substream, buffers, size);
1668 }
1669 }
1670 mutex_unlock(&runtime->oss.params_lock);
1671 /*
1672 * finish sync: drain the buffer
1673 */
1674 __direct:
1675 saved_f_flags = substream->f_flags;
1676 substream->f_flags &= ~O_NONBLOCK;
1677 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1678 substream->f_flags = saved_f_flags;
1679 if (err < 0)
1680 return err;
1681 runtime->oss.prepare = 1;
1682 }
1683
1684 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1685 if (substream != NULL) {
1686 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1687 return err;
1688 runtime = substream->runtime;
1689 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1690 if (err < 0)
1691 return err;
1692 runtime->oss.buffer_used = 0;
1693 runtime->oss.prepare = 1;
1694 }
1695 return 0;
1696 }
1697
1698 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1699 {
1700 int idx;
1701
1702 for (idx = 1; idx >= 0; --idx) {
1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704 struct snd_pcm_runtime *runtime;
1705 if (substream == NULL)
1706 continue;
1707 runtime = substream->runtime;
1708 if (rate < 1000)
1709 rate = 1000;
1710 else if (rate > 192000)
1711 rate = 192000;
1712 if (runtime->oss.rate != rate) {
1713 runtime->oss.params = 1;
1714 runtime->oss.rate = rate;
1715 }
1716 }
1717 return snd_pcm_oss_get_rate(pcm_oss_file);
1718 }
1719
1720 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1721 {
1722 struct snd_pcm_substream *substream;
1723 int err;
1724
1725 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1726 return err;
1727 return substream->runtime->oss.rate;
1728 }
1729
1730 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1731 {
1732 int idx;
1733 if (channels < 1)
1734 channels = 1;
1735 if (channels > 128)
1736 return -EINVAL;
1737 for (idx = 1; idx >= 0; --idx) {
1738 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1739 struct snd_pcm_runtime *runtime;
1740 if (substream == NULL)
1741 continue;
1742 runtime = substream->runtime;
1743 if (runtime->oss.channels != channels) {
1744 runtime->oss.params = 1;
1745 runtime->oss.channels = channels;
1746 }
1747 }
1748 return snd_pcm_oss_get_channels(pcm_oss_file);
1749 }
1750
1751 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1752 {
1753 struct snd_pcm_substream *substream;
1754 int err;
1755
1756 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1757 return err;
1758 return substream->runtime->oss.channels;
1759 }
1760
1761 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1762 {
1763 struct snd_pcm_substream *substream;
1764 int err;
1765
1766 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1767 return err;
1768 return substream->runtime->oss.period_bytes;
1769 }
1770
1771 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1772 {
1773 struct snd_pcm_substream *substream;
1774 int err;
1775 int direct;
1776 struct snd_pcm_hw_params *params;
1777 unsigned int formats = 0;
1778 struct snd_mask format_mask;
1779 int fmt;
1780
1781 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1782 return err;
1783 if (atomic_read(&substream->mmap_count))
1784 direct = 1;
1785 else
1786 direct = substream->oss.setup.direct;
1787 if (!direct)
1788 return AFMT_MU_LAW | AFMT_U8 |
1789 AFMT_S16_LE | AFMT_S16_BE |
1790 AFMT_S8 | AFMT_U16_LE |
1791 AFMT_U16_BE |
1792 AFMT_S32_LE | AFMT_S32_BE |
1793 AFMT_S24_LE | AFMT_S24_BE |
1794 AFMT_S24_PACKED;
1795 params = kmalloc(sizeof(*params), GFP_KERNEL);
1796 if (!params)
1797 return -ENOMEM;
1798 _snd_pcm_hw_params_any(params);
1799 err = snd_pcm_hw_refine(substream, params);
1800 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1801 kfree(params);
1802 if (err < 0)
1803 return err;
1804 for (fmt = 0; fmt < 32; ++fmt) {
1805 if (snd_mask_test(&format_mask, fmt)) {
1806 int f = snd_pcm_oss_format_to(fmt);
1807 if (f >= 0)
1808 formats |= f;
1809 }
1810 }
1811 return formats;
1812 }
1813
1814 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1815 {
1816 int formats, idx;
1817
1818 if (format != AFMT_QUERY) {
1819 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1820 if (formats < 0)
1821 return formats;
1822 if (!(formats & format))
1823 format = AFMT_U8;
1824 for (idx = 1; idx >= 0; --idx) {
1825 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1826 struct snd_pcm_runtime *runtime;
1827 if (substream == NULL)
1828 continue;
1829 runtime = substream->runtime;
1830 if (runtime->oss.format != format) {
1831 runtime->oss.params = 1;
1832 runtime->oss.format = format;
1833 }
1834 }
1835 }
1836 return snd_pcm_oss_get_format(pcm_oss_file);
1837 }
1838
1839 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1840 {
1841 struct snd_pcm_substream *substream;
1842 int err;
1843
1844 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1845 return err;
1846 return substream->runtime->oss.format;
1847 }
1848
1849 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1850 {
1851 struct snd_pcm_runtime *runtime;
1852
1853 if (substream == NULL)
1854 return 0;
1855 runtime = substream->runtime;
1856 if (subdivide == 0) {
1857 subdivide = runtime->oss.subdivision;
1858 if (subdivide == 0)
1859 subdivide = 1;
1860 return subdivide;
1861 }
1862 if (runtime->oss.subdivision || runtime->oss.fragshift)
1863 return -EINVAL;
1864 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1865 subdivide != 8 && subdivide != 16)
1866 return -EINVAL;
1867 runtime->oss.subdivision = subdivide;
1868 runtime->oss.params = 1;
1869 return subdivide;
1870 }
1871
1872 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1873 {
1874 int err = -EINVAL, idx;
1875
1876 for (idx = 1; idx >= 0; --idx) {
1877 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1878 if (substream == NULL)
1879 continue;
1880 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1881 return err;
1882 }
1883 return err;
1884 }
1885
1886 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1887 {
1888 struct snd_pcm_runtime *runtime;
1889
1890 if (substream == NULL)
1891 return 0;
1892 runtime = substream->runtime;
1893 if (runtime->oss.subdivision || runtime->oss.fragshift)
1894 return -EINVAL;
1895 runtime->oss.fragshift = val & 0xffff;
1896 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1897 if (runtime->oss.fragshift < 4) /* < 16 */
1898 runtime->oss.fragshift = 4;
1899 if (runtime->oss.maxfrags < 2)
1900 runtime->oss.maxfrags = 2;
1901 runtime->oss.params = 1;
1902 return 0;
1903 }
1904
1905 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1906 {
1907 int err = -EINVAL, idx;
1908
1909 for (idx = 1; idx >= 0; --idx) {
1910 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1911 if (substream == NULL)
1912 continue;
1913 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1914 return err;
1915 }
1916 return err;
1917 }
1918
1919 static int snd_pcm_oss_nonblock(struct file * file)
1920 {
1921 spin_lock(&file->f_lock);
1922 file->f_flags |= O_NONBLOCK;
1923 spin_unlock(&file->f_lock);
1924 return 0;
1925 }
1926
1927 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1928 {
1929
1930 if (substream == NULL) {
1931 res &= ~DSP_CAP_DUPLEX;
1932 return res;
1933 }
1934 #ifdef DSP_CAP_MULTI
1935 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1936 if (substream->pstr->substream_count > 1)
1937 res |= DSP_CAP_MULTI;
1938 #endif
1939 /* DSP_CAP_REALTIME is set all times: */
1940 /* all ALSA drivers can return actual pointer in ring buffer */
1941 #if defined(DSP_CAP_REALTIME) && 0
1942 {
1943 struct snd_pcm_runtime *runtime = substream->runtime;
1944 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1945 res &= ~DSP_CAP_REALTIME;
1946 }
1947 #endif
1948 return res;
1949 }
1950
1951 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1952 {
1953 int result, idx;
1954
1955 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1956 for (idx = 0; idx < 2; idx++) {
1957 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1958 result = snd_pcm_oss_get_caps1(substream, result);
1959 }
1960 result |= 0x0001; /* revision - same as SB AWE 64 */
1961 return result;
1962 }
1963
1964 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1965 snd_pcm_uframes_t hw_ptr)
1966 {
1967 struct snd_pcm_runtime *runtime = substream->runtime;
1968 snd_pcm_uframes_t appl_ptr;
1969 appl_ptr = hw_ptr + runtime->buffer_size;
1970 appl_ptr %= runtime->boundary;
1971 runtime->control->appl_ptr = appl_ptr;
1972 }
1973
1974 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1975 {
1976 struct snd_pcm_runtime *runtime;
1977 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1978 int err, cmd;
1979
1980 #ifdef OSS_DEBUG
1981 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1982 #endif
1983
1984 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1985 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1986
1987 if (psubstream) {
1988 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1989 return err;
1990 }
1991 if (csubstream) {
1992 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1993 return err;
1994 }
1995 if (psubstream) {
1996 runtime = psubstream->runtime;
1997 if (trigger & PCM_ENABLE_OUTPUT) {
1998 if (runtime->oss.trigger)
1999 goto _skip1;
2000 if (atomic_read(&psubstream->mmap_count))
2001 snd_pcm_oss_simulate_fill(psubstream,
2002 get_hw_ptr_period(runtime));
2003 runtime->oss.trigger = 1;
2004 runtime->start_threshold = 1;
2005 cmd = SNDRV_PCM_IOCTL_START;
2006 } else {
2007 if (!runtime->oss.trigger)
2008 goto _skip1;
2009 runtime->oss.trigger = 0;
2010 runtime->start_threshold = runtime->boundary;
2011 cmd = SNDRV_PCM_IOCTL_DROP;
2012 runtime->oss.prepare = 1;
2013 }
2014 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2015 if (err < 0)
2016 return err;
2017 }
2018 _skip1:
2019 if (csubstream) {
2020 runtime = csubstream->runtime;
2021 if (trigger & PCM_ENABLE_INPUT) {
2022 if (runtime->oss.trigger)
2023 goto _skip2;
2024 runtime->oss.trigger = 1;
2025 runtime->start_threshold = 1;
2026 cmd = SNDRV_PCM_IOCTL_START;
2027 } else {
2028 if (!runtime->oss.trigger)
2029 goto _skip2;
2030 runtime->oss.trigger = 0;
2031 runtime->start_threshold = runtime->boundary;
2032 cmd = SNDRV_PCM_IOCTL_DROP;
2033 runtime->oss.prepare = 1;
2034 }
2035 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2036 if (err < 0)
2037 return err;
2038 }
2039 _skip2:
2040 return 0;
2041 }
2042
2043 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2044 {
2045 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2046 int result = 0;
2047
2048 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2049 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2050 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2051 result |= PCM_ENABLE_OUTPUT;
2052 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2053 result |= PCM_ENABLE_INPUT;
2054 return result;
2055 }
2056
2057 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2058 {
2059 struct snd_pcm_substream *substream;
2060 struct snd_pcm_runtime *runtime;
2061 snd_pcm_sframes_t delay;
2062 int err;
2063
2064 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2065 if (substream == NULL)
2066 return -EINVAL;
2067 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2068 return err;
2069 runtime = substream->runtime;
2070 if (runtime->oss.params || runtime->oss.prepare)
2071 return 0;
2072 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2073 if (err == -EPIPE)
2074 delay = 0; /* hack for broken OSS applications */
2075 else if (err < 0)
2076 return err;
2077 return snd_pcm_oss_bytes(substream, delay);
2078 }
2079
2080 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2081 {
2082 struct snd_pcm_substream *substream;
2083 struct snd_pcm_runtime *runtime;
2084 snd_pcm_sframes_t delay;
2085 int fixup;
2086 struct count_info info;
2087 int err;
2088
2089 if (_info == NULL)
2090 return -EFAULT;
2091 substream = pcm_oss_file->streams[stream];
2092 if (substream == NULL)
2093 return -EINVAL;
2094 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2095 return err;
2096 runtime = substream->runtime;
2097 if (runtime->oss.params || runtime->oss.prepare) {
2098 memset(&info, 0, sizeof(info));
2099 if (copy_to_user(_info, &info, sizeof(info)))
2100 return -EFAULT;
2101 return 0;
2102 }
2103 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2104 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2105 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2106 err = 0;
2107 delay = 0;
2108 fixup = 0;
2109 } else {
2110 fixup = runtime->oss.buffer_used;
2111 }
2112 } else {
2113 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2114 fixup = -runtime->oss.buffer_used;
2115 }
2116 if (err < 0)
2117 return err;
2118 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2119 if (atomic_read(&substream->mmap_count)) {
2120 snd_pcm_sframes_t n;
2121 delay = get_hw_ptr_period(runtime);
2122 n = delay - runtime->oss.prev_hw_ptr_period;
2123 if (n < 0)
2124 n += runtime->boundary;
2125 info.blocks = n / runtime->period_size;
2126 runtime->oss.prev_hw_ptr_period = delay;
2127 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2128 snd_pcm_oss_simulate_fill(substream, delay);
2129 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2130 } else {
2131 delay = snd_pcm_oss_bytes(substream, delay);
2132 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2133 if (substream->oss.setup.buggyptr)
2134 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2135 else
2136 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2137 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2138 } else {
2139 delay += fixup;
2140 info.blocks = delay / runtime->oss.period_bytes;
2141 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2142 }
2143 }
2144 if (copy_to_user(_info, &info, sizeof(info)))
2145 return -EFAULT;
2146 return 0;
2147 }
2148
2149 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2150 {
2151 struct snd_pcm_substream *substream;
2152 struct snd_pcm_runtime *runtime;
2153 snd_pcm_sframes_t avail;
2154 int fixup;
2155 struct audio_buf_info info;
2156 int err;
2157
2158 if (_info == NULL)
2159 return -EFAULT;
2160 substream = pcm_oss_file->streams[stream];
2161 if (substream == NULL)
2162 return -EINVAL;
2163 runtime = substream->runtime;
2164
2165 if (runtime->oss.params &&
2166 (err = snd_pcm_oss_change_params(substream)) < 0)
2167 return err;
2168
2169 info.fragsize = runtime->oss.period_bytes;
2170 info.fragstotal = runtime->periods;
2171 if (runtime->oss.prepare) {
2172 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2173 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2174 info.fragments = runtime->oss.periods;
2175 } else {
2176 info.bytes = 0;
2177 info.fragments = 0;
2178 }
2179 } else {
2180 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2181 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2182 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2183 avail = runtime->buffer_size;
2184 err = 0;
2185 fixup = 0;
2186 } else {
2187 avail = runtime->buffer_size - avail;
2188 fixup = -runtime->oss.buffer_used;
2189 }
2190 } else {
2191 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2192 fixup = runtime->oss.buffer_used;
2193 }
2194 if (err < 0)
2195 return err;
2196 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2197 info.fragments = info.bytes / runtime->oss.period_bytes;
2198 }
2199
2200 #ifdef OSS_DEBUG
2201 pcm_dbg(substream->pcm,
2202 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2203 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2204 #endif
2205 if (copy_to_user(_info, &info, sizeof(info)))
2206 return -EFAULT;
2207 return 0;
2208 }
2209
2210 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2211 {
2212 // it won't be probably implemented
2213 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2214 return -EINVAL;
2215 }
2216
2217 static const char *strip_task_path(const char *path)
2218 {
2219 const char *ptr, *ptrl = NULL;
2220 for (ptr = path; *ptr; ptr++) {
2221 if (*ptr == '/')
2222 ptrl = ptr + 1;
2223 }
2224 return ptrl;
2225 }
2226
2227 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2228 const char *task_name,
2229 struct snd_pcm_oss_setup *rsetup)
2230 {
2231 struct snd_pcm_oss_setup *setup;
2232
2233 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2234 do {
2235 for (setup = pcm->streams[stream].oss.setup_list; setup;
2236 setup = setup->next) {
2237 if (!strcmp(setup->task_name, task_name))
2238 goto out;
2239 }
2240 } while ((task_name = strip_task_path(task_name)) != NULL);
2241 out:
2242 if (setup)
2243 *rsetup = *setup;
2244 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2245 }
2246
2247 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2248 {
2249 struct snd_pcm_runtime *runtime;
2250 runtime = substream->runtime;
2251 vfree(runtime->oss.buffer);
2252 runtime->oss.buffer = NULL;
2253 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2254 snd_pcm_oss_plugin_clear(substream);
2255 #endif
2256 substream->oss.oss = 0;
2257 }
2258
2259 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2260 struct snd_pcm_oss_setup *setup,
2261 int minor)
2262 {
2263 struct snd_pcm_runtime *runtime;
2264
2265 substream->oss.oss = 1;
2266 substream->oss.setup = *setup;
2267 if (setup->nonblock)
2268 substream->f_flags |= O_NONBLOCK;
2269 else if (setup->block)
2270 substream->f_flags &= ~O_NONBLOCK;
2271 runtime = substream->runtime;
2272 runtime->oss.params = 1;
2273 runtime->oss.trigger = 1;
2274 runtime->oss.rate = 8000;
2275 mutex_init(&runtime->oss.params_lock);
2276 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2277 case SNDRV_MINOR_OSS_PCM_8:
2278 runtime->oss.format = AFMT_U8;
2279 break;
2280 case SNDRV_MINOR_OSS_PCM_16:
2281 runtime->oss.format = AFMT_S16_LE;
2282 break;
2283 default:
2284 runtime->oss.format = AFMT_MU_LAW;
2285 }
2286 runtime->oss.channels = 1;
2287 runtime->oss.fragshift = 0;
2288 runtime->oss.maxfrags = 0;
2289 runtime->oss.subdivision = 0;
2290 substream->pcm_release = snd_pcm_oss_release_substream;
2291 }
2292
2293 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2294 {
2295 int cidx;
2296 if (!pcm_oss_file)
2297 return 0;
2298 for (cidx = 0; cidx < 2; ++cidx) {
2299 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2300 if (substream)
2301 snd_pcm_release_substream(substream);
2302 }
2303 kfree(pcm_oss_file);
2304 return 0;
2305 }
2306
2307 static int snd_pcm_oss_open_file(struct file *file,
2308 struct snd_pcm *pcm,
2309 struct snd_pcm_oss_file **rpcm_oss_file,
2310 int minor,
2311 struct snd_pcm_oss_setup *setup)
2312 {
2313 int idx, err;
2314 struct snd_pcm_oss_file *pcm_oss_file;
2315 struct snd_pcm_substream *substream;
2316 fmode_t f_mode = file->f_mode;
2317
2318 if (rpcm_oss_file)
2319 *rpcm_oss_file = NULL;
2320
2321 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2322 if (pcm_oss_file == NULL)
2323 return -ENOMEM;
2324
2325 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2326 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2327 f_mode = FMODE_WRITE;
2328
2329 file->f_flags &= ~O_APPEND;
2330 for (idx = 0; idx < 2; idx++) {
2331 if (setup[idx].disable)
2332 continue;
2333 if (! pcm->streams[idx].substream_count)
2334 continue; /* no matching substream */
2335 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2336 if (! (f_mode & FMODE_WRITE))
2337 continue;
2338 } else {
2339 if (! (f_mode & FMODE_READ))
2340 continue;
2341 }
2342 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2343 if (err < 0) {
2344 snd_pcm_oss_release_file(pcm_oss_file);
2345 return err;
2346 }
2347
2348 pcm_oss_file->streams[idx] = substream;
2349 substream->file = pcm_oss_file;
2350 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2351 }
2352
2353 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2354 snd_pcm_oss_release_file(pcm_oss_file);
2355 return -EINVAL;
2356 }
2357
2358 file->private_data = pcm_oss_file;
2359 if (rpcm_oss_file)
2360 *rpcm_oss_file = pcm_oss_file;
2361 return 0;
2362 }
2363
2364
2365 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2366 {
2367 unsigned int idx;
2368
2369 if (snd_BUG_ON(!task || !name || size < 2))
2370 return -EINVAL;
2371 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2372 name[idx] = task->comm[idx];
2373 name[idx] = '\0';
2374 return 0;
2375 }
2376
2377 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2378 {
2379 int err;
2380 char task_name[32];
2381 struct snd_pcm *pcm;
2382 struct snd_pcm_oss_file *pcm_oss_file;
2383 struct snd_pcm_oss_setup setup[2];
2384 int nonblock;
2385 wait_queue_t wait;
2386
2387 err = nonseekable_open(inode, file);
2388 if (err < 0)
2389 return err;
2390
2391 pcm = snd_lookup_oss_minor_data(iminor(inode),
2392 SNDRV_OSS_DEVICE_TYPE_PCM);
2393 if (pcm == NULL) {
2394 err = -ENODEV;
2395 goto __error1;
2396 }
2397 err = snd_card_file_add(pcm->card, file);
2398 if (err < 0)
2399 goto __error1;
2400 if (!try_module_get(pcm->card->module)) {
2401 err = -EFAULT;
2402 goto __error2;
2403 }
2404 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2405 err = -EFAULT;
2406 goto __error;
2407 }
2408 memset(setup, 0, sizeof(setup));
2409 if (file->f_mode & FMODE_WRITE)
2410 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2411 task_name, &setup[0]);
2412 if (file->f_mode & FMODE_READ)
2413 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2414 task_name, &setup[1]);
2415
2416 nonblock = !!(file->f_flags & O_NONBLOCK);
2417 if (!nonblock)
2418 nonblock = nonblock_open;
2419
2420 init_waitqueue_entry(&wait, current);
2421 add_wait_queue(&pcm->open_wait, &wait);
2422 mutex_lock(&pcm->open_mutex);
2423 while (1) {
2424 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2425 iminor(inode), setup);
2426 if (err >= 0)
2427 break;
2428 if (err == -EAGAIN) {
2429 if (nonblock) {
2430 err = -EBUSY;
2431 break;
2432 }
2433 } else
2434 break;
2435 set_current_state(TASK_INTERRUPTIBLE);
2436 mutex_unlock(&pcm->open_mutex);
2437 schedule();
2438 mutex_lock(&pcm->open_mutex);
2439 if (pcm->card->shutdown) {
2440 err = -ENODEV;
2441 break;
2442 }
2443 if (signal_pending(current)) {
2444 err = -ERESTARTSYS;
2445 break;
2446 }
2447 }
2448 remove_wait_queue(&pcm->open_wait, &wait);
2449 mutex_unlock(&pcm->open_mutex);
2450 if (err < 0)
2451 goto __error;
2452 snd_card_unref(pcm->card);
2453 return err;
2454
2455 __error:
2456 module_put(pcm->card->module);
2457 __error2:
2458 snd_card_file_remove(pcm->card, file);
2459 __error1:
2460 if (pcm)
2461 snd_card_unref(pcm->card);
2462 return err;
2463 }
2464
2465 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2466 {
2467 struct snd_pcm *pcm;
2468 struct snd_pcm_substream *substream;
2469 struct snd_pcm_oss_file *pcm_oss_file;
2470
2471 pcm_oss_file = file->private_data;
2472 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2473 if (substream == NULL)
2474 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2475 if (snd_BUG_ON(!substream))
2476 return -ENXIO;
2477 pcm = substream->pcm;
2478 if (!pcm->card->shutdown)
2479 snd_pcm_oss_sync(pcm_oss_file);
2480 mutex_lock(&pcm->open_mutex);
2481 snd_pcm_oss_release_file(pcm_oss_file);
2482 mutex_unlock(&pcm->open_mutex);
2483 wake_up(&pcm->open_wait);
2484 module_put(pcm->card->module);
2485 snd_card_file_remove(pcm->card, file);
2486 return 0;
2487 }
2488
2489 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2490 {
2491 struct snd_pcm_oss_file *pcm_oss_file;
2492 int __user *p = (int __user *)arg;
2493 int res;
2494
2495 pcm_oss_file = file->private_data;
2496 if (cmd == OSS_GETVERSION)
2497 return put_user(SNDRV_OSS_VERSION, p);
2498 if (cmd == OSS_ALSAEMULVER)
2499 return put_user(1, p);
2500 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2501 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2502 struct snd_pcm_substream *substream;
2503 int idx;
2504 for (idx = 0; idx < 2; ++idx) {
2505 substream = pcm_oss_file->streams[idx];
2506 if (substream != NULL)
2507 break;
2508 }
2509 if (snd_BUG_ON(idx >= 2))
2510 return -ENXIO;
2511 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2512 }
2513 #endif
2514 if (((cmd >> 8) & 0xff) != 'P')
2515 return -EINVAL;
2516 #ifdef OSS_DEBUG
2517 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2518 #endif
2519 switch (cmd) {
2520 case SNDCTL_DSP_RESET:
2521 return snd_pcm_oss_reset(pcm_oss_file);
2522 case SNDCTL_DSP_SYNC:
2523 return snd_pcm_oss_sync(pcm_oss_file);
2524 case SNDCTL_DSP_SPEED:
2525 if (get_user(res, p))
2526 return -EFAULT;
2527 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2528 return res;
2529 return put_user(res, p);
2530 case SOUND_PCM_READ_RATE:
2531 res = snd_pcm_oss_get_rate(pcm_oss_file);
2532 if (res < 0)
2533 return res;
2534 return put_user(res, p);
2535 case SNDCTL_DSP_STEREO:
2536 if (get_user(res, p))
2537 return -EFAULT;
2538 res = res > 0 ? 2 : 1;
2539 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2540 return res;
2541 return put_user(--res, p);
2542 case SNDCTL_DSP_GETBLKSIZE:
2543 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2544 if (res < 0)
2545 return res;
2546 return put_user(res, p);
2547 case SNDCTL_DSP_SETFMT:
2548 if (get_user(res, p))
2549 return -EFAULT;
2550 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2551 if (res < 0)
2552 return res;
2553 return put_user(res, p);
2554 case SOUND_PCM_READ_BITS:
2555 res = snd_pcm_oss_get_format(pcm_oss_file);
2556 if (res < 0)
2557 return res;
2558 return put_user(res, p);
2559 case SNDCTL_DSP_CHANNELS:
2560 if (get_user(res, p))
2561 return -EFAULT;
2562 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2563 if (res < 0)
2564 return res;
2565 return put_user(res, p);
2566 case SOUND_PCM_READ_CHANNELS:
2567 res = snd_pcm_oss_get_channels(pcm_oss_file);
2568 if (res < 0)
2569 return res;
2570 return put_user(res, p);
2571 case SOUND_PCM_WRITE_FILTER:
2572 case SOUND_PCM_READ_FILTER:
2573 return -EIO;
2574 case SNDCTL_DSP_POST:
2575 return snd_pcm_oss_post(pcm_oss_file);
2576 case SNDCTL_DSP_SUBDIVIDE:
2577 if (get_user(res, p))
2578 return -EFAULT;
2579 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2580 if (res < 0)
2581 return res;
2582 return put_user(res, p);
2583 case SNDCTL_DSP_SETFRAGMENT:
2584 if (get_user(res, p))
2585 return -EFAULT;
2586 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2587 case SNDCTL_DSP_GETFMTS:
2588 res = snd_pcm_oss_get_formats(pcm_oss_file);
2589 if (res < 0)
2590 return res;
2591 return put_user(res, p);
2592 case SNDCTL_DSP_GETOSPACE:
2593 case SNDCTL_DSP_GETISPACE:
2594 return snd_pcm_oss_get_space(pcm_oss_file,
2595 cmd == SNDCTL_DSP_GETISPACE ?
2596 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2597 (struct audio_buf_info __user *) arg);
2598 case SNDCTL_DSP_NONBLOCK:
2599 return snd_pcm_oss_nonblock(file);
2600 case SNDCTL_DSP_GETCAPS:
2601 res = snd_pcm_oss_get_caps(pcm_oss_file);
2602 if (res < 0)
2603 return res;
2604 return put_user(res, p);
2605 case SNDCTL_DSP_GETTRIGGER:
2606 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2607 if (res < 0)
2608 return res;
2609 return put_user(res, p);
2610 case SNDCTL_DSP_SETTRIGGER:
2611 if (get_user(res, p))
2612 return -EFAULT;
2613 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2614 case SNDCTL_DSP_GETIPTR:
2615 case SNDCTL_DSP_GETOPTR:
2616 return snd_pcm_oss_get_ptr(pcm_oss_file,
2617 cmd == SNDCTL_DSP_GETIPTR ?
2618 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2619 (struct count_info __user *) arg);
2620 case SNDCTL_DSP_MAPINBUF:
2621 case SNDCTL_DSP_MAPOUTBUF:
2622 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2623 cmd == SNDCTL_DSP_MAPINBUF ?
2624 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2625 (struct buffmem_desc __user *) arg);
2626 case SNDCTL_DSP_SETSYNCRO:
2627 /* stop DMA now.. */
2628 return 0;
2629 case SNDCTL_DSP_SETDUPLEX:
2630 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2631 return 0;
2632 return -EIO;
2633 case SNDCTL_DSP_GETODELAY:
2634 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2635 if (res < 0) {
2636 /* it's for sure, some broken apps don't check for error codes */
2637 put_user(0, p);
2638 return res;
2639 }
2640 return put_user(res, p);
2641 case SNDCTL_DSP_PROFILE:
2642 return 0; /* silently ignore */
2643 default:
2644 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2645 }
2646 return -EINVAL;
2647 }
2648
2649 #ifdef CONFIG_COMPAT
2650 /* all compatible */
2651 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2652 unsigned long arg)
2653 {
2654 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2655 }
2656 #else
2657 #define snd_pcm_oss_ioctl_compat NULL
2658 #endif
2659
2660 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2661 {
2662 struct snd_pcm_oss_file *pcm_oss_file;
2663 struct snd_pcm_substream *substream;
2664
2665 pcm_oss_file = file->private_data;
2666 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2667 if (substream == NULL)
2668 return -ENXIO;
2669 substream->f_flags = file->f_flags & O_NONBLOCK;
2670 #ifndef OSS_DEBUG
2671 return snd_pcm_oss_read1(substream, buf, count);
2672 #else
2673 {
2674 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2675 pcm_dbg(substream->pcm,
2676 "pcm_oss: read %li bytes (returned %li bytes)\n",
2677 (long)count, (long)res);
2678 return res;
2679 }
2680 #endif
2681 }
2682
2683 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2684 {
2685 struct snd_pcm_oss_file *pcm_oss_file;
2686 struct snd_pcm_substream *substream;
2687 long result;
2688
2689 pcm_oss_file = file->private_data;
2690 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2691 if (substream == NULL)
2692 return -ENXIO;
2693 substream->f_flags = file->f_flags & O_NONBLOCK;
2694 result = snd_pcm_oss_write1(substream, buf, count);
2695 #ifdef OSS_DEBUG
2696 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2697 (long)count, (long)result);
2698 #endif
2699 return result;
2700 }
2701
2702 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2703 {
2704 struct snd_pcm_runtime *runtime = substream->runtime;
2705 if (atomic_read(&substream->mmap_count))
2706 return runtime->oss.prev_hw_ptr_period !=
2707 get_hw_ptr_period(runtime);
2708 else
2709 return snd_pcm_playback_avail(runtime) >=
2710 runtime->oss.period_frames;
2711 }
2712
2713 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2714 {
2715 struct snd_pcm_runtime *runtime = substream->runtime;
2716 if (atomic_read(&substream->mmap_count))
2717 return runtime->oss.prev_hw_ptr_period !=
2718 get_hw_ptr_period(runtime);
2719 else
2720 return snd_pcm_capture_avail(runtime) >=
2721 runtime->oss.period_frames;
2722 }
2723
2724 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2725 {
2726 struct snd_pcm_oss_file *pcm_oss_file;
2727 unsigned int mask;
2728 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2729
2730 pcm_oss_file = file->private_data;
2731
2732 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2733 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2734
2735 mask = 0;
2736 if (psubstream != NULL) {
2737 struct snd_pcm_runtime *runtime = psubstream->runtime;
2738 poll_wait(file, &runtime->sleep, wait);
2739 snd_pcm_stream_lock_irq(psubstream);
2740 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2741 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2742 snd_pcm_oss_playback_ready(psubstream)))
2743 mask |= POLLOUT | POLLWRNORM;
2744 snd_pcm_stream_unlock_irq(psubstream);
2745 }
2746 if (csubstream != NULL) {
2747 struct snd_pcm_runtime *runtime = csubstream->runtime;
2748 snd_pcm_state_t ostate;
2749 poll_wait(file, &runtime->sleep, wait);
2750 snd_pcm_stream_lock_irq(csubstream);
2751 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2752 snd_pcm_oss_capture_ready(csubstream))
2753 mask |= POLLIN | POLLRDNORM;
2754 snd_pcm_stream_unlock_irq(csubstream);
2755 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2756 struct snd_pcm_oss_file ofile;
2757 memset(&ofile, 0, sizeof(ofile));
2758 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2759 runtime->oss.trigger = 0;
2760 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2761 }
2762 }
2763
2764 return mask;
2765 }
2766
2767 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2768 {
2769 struct snd_pcm_oss_file *pcm_oss_file;
2770 struct snd_pcm_substream *substream = NULL;
2771 struct snd_pcm_runtime *runtime;
2772 int err;
2773
2774 #ifdef OSS_DEBUG
2775 pr_debug("pcm_oss: mmap begin\n");
2776 #endif
2777 pcm_oss_file = file->private_data;
2778 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2779 case VM_READ | VM_WRITE:
2780 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2781 if (substream)
2782 break;
2783 /* Fall through */
2784 case VM_READ:
2785 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2786 break;
2787 case VM_WRITE:
2788 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2789 break;
2790 default:
2791 return -EINVAL;
2792 }
2793 /* set VM_READ access as well to fix memset() routines that do
2794 reads before writes (to improve performance) */
2795 area->vm_flags |= VM_READ;
2796 if (substream == NULL)
2797 return -ENXIO;
2798 runtime = substream->runtime;
2799 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2800 return -EIO;
2801 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2802 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2803 else
2804 return -EIO;
2805
2806 if (runtime->oss.params) {
2807 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2808 return err;
2809 }
2810 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2811 if (runtime->oss.plugin_first != NULL)
2812 return -EIO;
2813 #endif
2814
2815 if (area->vm_pgoff != 0)
2816 return -EINVAL;
2817
2818 err = snd_pcm_mmap_data(substream, file, area);
2819 if (err < 0)
2820 return err;
2821 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2822 runtime->silence_threshold = 0;
2823 runtime->silence_size = 0;
2824 #ifdef OSS_DEBUG
2825 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2826 runtime->oss.mmap_bytes);
2827 #endif
2828 /* In mmap mode we never stop */
2829 runtime->stop_threshold = runtime->boundary;
2830
2831 return 0;
2832 }
2833
2834 #ifdef CONFIG_SND_VERBOSE_PROCFS
2835 /*
2836 * /proc interface
2837 */
2838
2839 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2840 struct snd_info_buffer *buffer)
2841 {
2842 struct snd_pcm_str *pstr = entry->private_data;
2843 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2844 mutex_lock(&pstr->oss.setup_mutex);
2845 while (setup) {
2846 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2847 setup->task_name,
2848 setup->periods,
2849 setup->period_size,
2850 setup->disable ? " disable" : "",
2851 setup->direct ? " direct" : "",
2852 setup->block ? " block" : "",
2853 setup->nonblock ? " non-block" : "",
2854 setup->partialfrag ? " partial-frag" : "",
2855 setup->nosilence ? " no-silence" : "");
2856 setup = setup->next;
2857 }
2858 mutex_unlock(&pstr->oss.setup_mutex);
2859 }
2860
2861 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2862 {
2863 struct snd_pcm_oss_setup *setup, *setupn;
2864
2865 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2866 setup; setup = setupn) {
2867 setupn = setup->next;
2868 kfree(setup->task_name);
2869 kfree(setup);
2870 }
2871 pstr->oss.setup_list = NULL;
2872 }
2873
2874 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2875 struct snd_info_buffer *buffer)
2876 {
2877 struct snd_pcm_str *pstr = entry->private_data;
2878 char line[128], str[32], task_name[32];
2879 const char *ptr;
2880 int idx1;
2881 struct snd_pcm_oss_setup *setup, *setup1, template;
2882
2883 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2884 mutex_lock(&pstr->oss.setup_mutex);
2885 memset(&template, 0, sizeof(template));
2886 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2887 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2888 snd_pcm_oss_proc_free_setup_list(pstr);
2889 mutex_unlock(&pstr->oss.setup_mutex);
2890 continue;
2891 }
2892 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2893 if (!strcmp(setup->task_name, task_name)) {
2894 template = *setup;
2895 break;
2896 }
2897 }
2898 ptr = snd_info_get_str(str, ptr, sizeof(str));
2899 template.periods = simple_strtoul(str, NULL, 10);
2900 ptr = snd_info_get_str(str, ptr, sizeof(str));
2901 template.period_size = simple_strtoul(str, NULL, 10);
2902 for (idx1 = 31; idx1 >= 0; idx1--)
2903 if (template.period_size & (1 << idx1))
2904 break;
2905 for (idx1--; idx1 >= 0; idx1--)
2906 template.period_size &= ~(1 << idx1);
2907 do {
2908 ptr = snd_info_get_str(str, ptr, sizeof(str));
2909 if (!strcmp(str, "disable")) {
2910 template.disable = 1;
2911 } else if (!strcmp(str, "direct")) {
2912 template.direct = 1;
2913 } else if (!strcmp(str, "block")) {
2914 template.block = 1;
2915 } else if (!strcmp(str, "non-block")) {
2916 template.nonblock = 1;
2917 } else if (!strcmp(str, "partial-frag")) {
2918 template.partialfrag = 1;
2919 } else if (!strcmp(str, "no-silence")) {
2920 template.nosilence = 1;
2921 } else if (!strcmp(str, "buggy-ptr")) {
2922 template.buggyptr = 1;
2923 }
2924 } while (*str);
2925 if (setup == NULL) {
2926 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2927 if (! setup) {
2928 buffer->error = -ENOMEM;
2929 mutex_unlock(&pstr->oss.setup_mutex);
2930 return;
2931 }
2932 if (pstr->oss.setup_list == NULL)
2933 pstr->oss.setup_list = setup;
2934 else {
2935 for (setup1 = pstr->oss.setup_list;
2936 setup1->next; setup1 = setup1->next);
2937 setup1->next = setup;
2938 }
2939 template.task_name = kstrdup(task_name, GFP_KERNEL);
2940 if (! template.task_name) {
2941 kfree(setup);
2942 buffer->error = -ENOMEM;
2943 mutex_unlock(&pstr->oss.setup_mutex);
2944 return;
2945 }
2946 }
2947 *setup = template;
2948 mutex_unlock(&pstr->oss.setup_mutex);
2949 }
2950 }
2951
2952 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2953 {
2954 int stream;
2955 for (stream = 0; stream < 2; ++stream) {
2956 struct snd_info_entry *entry;
2957 struct snd_pcm_str *pstr = &pcm->streams[stream];
2958 if (pstr->substream_count == 0)
2959 continue;
2960 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2961 entry->content = SNDRV_INFO_CONTENT_TEXT;
2962 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2963 entry->c.text.read = snd_pcm_oss_proc_read;
2964 entry->c.text.write = snd_pcm_oss_proc_write;
2965 entry->private_data = pstr;
2966 if (snd_info_register(entry) < 0) {
2967 snd_info_free_entry(entry);
2968 entry = NULL;
2969 }
2970 }
2971 pstr->oss.proc_entry = entry;
2972 }
2973 }
2974
2975 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2976 {
2977 int stream;
2978 for (stream = 0; stream < 2; ++stream) {
2979 struct snd_pcm_str *pstr = &pcm->streams[stream];
2980 snd_info_free_entry(pstr->oss.proc_entry);
2981 pstr->oss.proc_entry = NULL;
2982 snd_pcm_oss_proc_free_setup_list(pstr);
2983 }
2984 }
2985 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2986 #define snd_pcm_oss_proc_init(pcm)
2987 #define snd_pcm_oss_proc_done(pcm)
2988 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2989
2990 /*
2991 * ENTRY functions
2992 */
2993
2994 static const struct file_operations snd_pcm_oss_f_reg =
2995 {
2996 .owner = THIS_MODULE,
2997 .read = snd_pcm_oss_read,
2998 .write = snd_pcm_oss_write,
2999 .open = snd_pcm_oss_open,
3000 .release = snd_pcm_oss_release,
3001 .llseek = no_llseek,
3002 .poll = snd_pcm_oss_poll,
3003 .unlocked_ioctl = snd_pcm_oss_ioctl,
3004 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3005 .mmap = snd_pcm_oss_mmap,
3006 };
3007
3008 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3009 {
3010 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3011 pcm->card, index, &snd_pcm_oss_f_reg,
3012 pcm) < 0) {
3013 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3014 pcm->card->number, pcm->device);
3015 }
3016 }
3017
3018 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3019 {
3020 pcm->oss.reg = 0;
3021 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3022 char name[128];
3023 int duplex;
3024 register_oss_dsp(pcm, 0);
3025 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3026 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3027 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3028 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3029 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3030 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3031 pcm->card->number,
3032 name);
3033 #endif
3034 pcm->oss.reg++;
3035 pcm->oss.reg_mask |= 1;
3036 }
3037 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3038 register_oss_dsp(pcm, 1);
3039 pcm->oss.reg++;
3040 pcm->oss.reg_mask |= 2;
3041 }
3042
3043 if (pcm->oss.reg)
3044 snd_pcm_oss_proc_init(pcm);
3045
3046 return 0;
3047 }
3048
3049 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3050 {
3051 if (pcm->oss.reg) {
3052 if (pcm->oss.reg_mask & 1) {
3053 pcm->oss.reg_mask &= ~1;
3054 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3055 pcm->card, 0);
3056 }
3057 if (pcm->oss.reg_mask & 2) {
3058 pcm->oss.reg_mask &= ~2;
3059 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3060 pcm->card, 1);
3061 }
3062 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3063 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3064 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3065 #endif
3066 }
3067 pcm->oss.reg = 0;
3068 }
3069 return 0;
3070 }
3071
3072 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3073 {
3074 snd_pcm_oss_disconnect_minor(pcm);
3075 snd_pcm_oss_proc_done(pcm);
3076 return 0;
3077 }
3078
3079 static struct snd_pcm_notify snd_pcm_oss_notify =
3080 {
3081 .n_register = snd_pcm_oss_register_minor,
3082 .n_disconnect = snd_pcm_oss_disconnect_minor,
3083 .n_unregister = snd_pcm_oss_unregister_minor,
3084 };
3085
3086 static int __init alsa_pcm_oss_init(void)
3087 {
3088 int i;
3089 int err;
3090
3091 /* check device map table */
3092 for (i = 0; i < SNDRV_CARDS; i++) {
3093 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3094 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3095 i, dsp_map[i]);
3096 dsp_map[i] = 0;
3097 }
3098 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3099 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3100 i, adsp_map[i]);
3101 adsp_map[i] = 1;
3102 }
3103 }
3104 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3105 return err;
3106 return 0;
3107 }
3108
3109 static void __exit alsa_pcm_oss_exit(void)
3110 {
3111 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3112 }
3113
3114 module_init(alsa_pcm_oss_init)
3115 module_exit(alsa_pcm_oss_exit)
Ubuntu Disco kernel mirror for Proxmox VE and PMG