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[ALSA] Remove PCM xfer_align sw params
[deliverable/linux.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 <sound/driver.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/time.h>
33 #include <linux/vmalloc.h>
34 #include <linux/moduleparam.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44
45 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47 static int dsp_map[SNDRV_CARDS];
48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49 static int nonblock_open = 1;
50
51 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53 MODULE_LICENSE("GPL");
54 module_param_array(dsp_map, int, NULL, 0444);
55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56 module_param_array(adsp_map, int, NULL, 0444);
57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58 module_param(nonblock_open, bool, 0644);
59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 /*
81 * helper functions to process hw_params
82 */
83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84 {
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105 }
106
107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108 {
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129 }
130
131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132 {
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139 }
140
141 /**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149 static unsigned int
150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152 {
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165 }
166
167 /**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175 static unsigned int
176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178 {
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191 }
192
193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196 {
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204 }
205
206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210 {
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220 }
221
222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225 {
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251 }
252
253 /**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269 {
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279 }
280
281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284 {
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312 }
313
314 /**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330 {
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340 }
341
342 static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345 {
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356 }
357
358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360 {
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372 }
373
374 /* Return 1 if min is nearer to best than max */
375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378 {
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384 }
385
386 /**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404 {
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 snd_assert(max >= 0, return -EINVAL);
457 last = 1;
458 }
459 _end:
460 kfree(save);
461 if (last)
462 v = snd_pcm_hw_param_last(pcm, params, var, dir);
463 else
464 v = snd_pcm_hw_param_first(pcm, params, var, dir);
465 snd_assert(v >= 0, return -EINVAL);
466 return v;
467 }
468
469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
470 snd_pcm_hw_param_t var, unsigned int val,
471 int dir)
472 {
473 int changed;
474 if (hw_is_mask(var)) {
475 struct snd_mask *m = hw_param_mask(params, var);
476 if (val == 0 && dir < 0) {
477 changed = -EINVAL;
478 snd_mask_none(m);
479 } else {
480 if (dir > 0)
481 val++;
482 else if (dir < 0)
483 val--;
484 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
485 }
486 } else if (hw_is_interval(var)) {
487 struct snd_interval *i = hw_param_interval(params, var);
488 if (val == 0 && dir < 0) {
489 changed = -EINVAL;
490 snd_interval_none(i);
491 } else if (dir == 0)
492 changed = snd_interval_refine_set(i, val);
493 else {
494 struct snd_interval t;
495 t.openmin = 1;
496 t.openmax = 1;
497 t.empty = 0;
498 t.integer = 0;
499 if (dir < 0) {
500 t.min = val - 1;
501 t.max = val;
502 } else {
503 t.min = val;
504 t.max = val+1;
505 }
506 changed = snd_interval_refine(i, &t);
507 }
508 } else
509 return -EINVAL;
510 if (changed) {
511 params->cmask |= 1 << var;
512 params->rmask |= 1 << var;
513 }
514 return changed;
515 }
516
517 /**
518 * snd_pcm_hw_param_set
519 * @pcm: PCM instance
520 * @params: the hw_params instance
521 * @var: parameter to retrieve
522 * @val: value to set
523 * @dir: pointer to the direction (-1,0,1) or NULL
524 *
525 * Inside configuration space defined by PARAMS remove from PAR all
526 * values != VAL. Reduce configuration space accordingly.
527 * Return VAL or -EINVAL if the configuration space is empty
528 */
529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
530 struct snd_pcm_hw_params *params,
531 snd_pcm_hw_param_t var, unsigned int val,
532 int dir)
533 {
534 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
535 if (changed < 0)
536 return changed;
537 if (params->rmask) {
538 int err = snd_pcm_hw_refine(pcm, params);
539 if (err < 0)
540 return err;
541 }
542 return snd_pcm_hw_param_value(params, var, NULL);
543 }
544
545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
546 snd_pcm_hw_param_t var)
547 {
548 int changed;
549 changed = snd_interval_setinteger(hw_param_interval(params, var));
550 if (changed) {
551 params->cmask |= 1 << var;
552 params->rmask |= 1 << var;
553 }
554 return changed;
555 }
556
557 /*
558 * plugin
559 */
560
561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
563 {
564 struct snd_pcm_runtime *runtime = substream->runtime;
565 struct snd_pcm_plugin *plugin, *next;
566
567 plugin = runtime->oss.plugin_first;
568 while (plugin) {
569 next = plugin->next;
570 snd_pcm_plugin_free(plugin);
571 plugin = next;
572 }
573 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
574 return 0;
575 }
576
577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
578 {
579 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
580 plugin->next = runtime->oss.plugin_first;
581 plugin->prev = NULL;
582 if (runtime->oss.plugin_first) {
583 runtime->oss.plugin_first->prev = plugin;
584 runtime->oss.plugin_first = plugin;
585 } else {
586 runtime->oss.plugin_last =
587 runtime->oss.plugin_first = plugin;
588 }
589 return 0;
590 }
591
592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
593 {
594 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
595 plugin->next = NULL;
596 plugin->prev = runtime->oss.plugin_last;
597 if (runtime->oss.plugin_last) {
598 runtime->oss.plugin_last->next = plugin;
599 runtime->oss.plugin_last = plugin;
600 } else {
601 runtime->oss.plugin_last =
602 runtime->oss.plugin_first = plugin;
603 }
604 return 0;
605 }
606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
607
608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
609 {
610 struct snd_pcm_runtime *runtime = substream->runtime;
611 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
612 long bytes = frames_to_bytes(runtime, frames);
613 if (buffer_size == runtime->oss.buffer_bytes)
614 return bytes;
615 #if BITS_PER_LONG >= 64
616 return runtime->oss.buffer_bytes * bytes / buffer_size;
617 #else
618 {
619 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
620 u32 rem;
621 div64_32(&bsize, buffer_size, &rem);
622 return (long)bsize;
623 }
624 #endif
625 }
626
627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
628 {
629 struct snd_pcm_runtime *runtime = substream->runtime;
630 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
631 if (buffer_size == runtime->oss.buffer_bytes)
632 return bytes_to_frames(runtime, bytes);
633 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
634 }
635
636 /* define extended formats in the recent OSS versions (if any) */
637 /* linear formats */
638 #define AFMT_S32_LE 0x00001000
639 #define AFMT_S32_BE 0x00002000
640 #define AFMT_S24_LE 0x00008000
641 #define AFMT_S24_BE 0x00010000
642 #define AFMT_S24_PACKED 0x00040000
643
644 /* other supported formats */
645 #define AFMT_FLOAT 0x00004000
646 #define AFMT_SPDIF_RAW 0x00020000
647
648 /* unsupported formats */
649 #define AFMT_AC3 0x00000400
650 #define AFMT_VORBIS 0x00000800
651
652 static int snd_pcm_oss_format_from(int format)
653 {
654 switch (format) {
655 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
656 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
657 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
658 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
659 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
660 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
661 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
662 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
663 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
664 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
665 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
666 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
667 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
668 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
669 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
670 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
671 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
672 default: return SNDRV_PCM_FORMAT_U8;
673 }
674 }
675
676 static int snd_pcm_oss_format_to(int format)
677 {
678 switch (format) {
679 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
680 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
681 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
682 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
683 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
684 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
685 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
686 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
687 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
688 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
689 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
690 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
691 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
692 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
693 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
694 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
695 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
696 default: return -EINVAL;
697 }
698 }
699
700 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
701 struct snd_pcm_hw_params *oss_params,
702 struct snd_pcm_hw_params *slave_params)
703 {
704 size_t s;
705 size_t oss_buffer_size, oss_period_size, oss_periods;
706 size_t min_period_size, max_period_size;
707 struct snd_pcm_runtime *runtime = substream->runtime;
708 size_t oss_frame_size;
709
710 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
711 params_channels(oss_params) / 8;
712
713 oss_buffer_size = snd_pcm_plug_client_size(substream,
714 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
715 oss_buffer_size = 1 << ld2(oss_buffer_size);
716 if (atomic_read(&substream->mmap_count)) {
717 if (oss_buffer_size > runtime->oss.mmap_bytes)
718 oss_buffer_size = runtime->oss.mmap_bytes;
719 }
720
721 if (substream->oss.setup.period_size > 16)
722 oss_period_size = substream->oss.setup.period_size;
723 else if (runtime->oss.fragshift) {
724 oss_period_size = 1 << runtime->oss.fragshift;
725 if (oss_period_size > oss_buffer_size / 2)
726 oss_period_size = oss_buffer_size / 2;
727 } else {
728 int sd;
729 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
730
731 oss_period_size = oss_buffer_size;
732 do {
733 oss_period_size /= 2;
734 } while (oss_period_size > bytes_per_sec);
735 if (runtime->oss.subdivision == 0) {
736 sd = 4;
737 if (oss_period_size / sd > 4096)
738 sd *= 2;
739 if (oss_period_size / sd < 4096)
740 sd = 1;
741 } else
742 sd = runtime->oss.subdivision;
743 oss_period_size /= sd;
744 if (oss_period_size < 16)
745 oss_period_size = 16;
746 }
747
748 min_period_size = snd_pcm_plug_client_size(substream,
749 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
750 min_period_size *= oss_frame_size;
751 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
752 if (oss_period_size < min_period_size)
753 oss_period_size = min_period_size;
754
755 max_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 max_period_size *= oss_frame_size;
758 max_period_size = 1 << ld2(max_period_size);
759 if (oss_period_size > max_period_size)
760 oss_period_size = max_period_size;
761
762 oss_periods = oss_buffer_size / oss_period_size;
763
764 if (substream->oss.setup.periods > 1)
765 oss_periods = substream->oss.setup.periods;
766
767 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
768 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
769 s = runtime->oss.maxfrags;
770 if (oss_periods > s)
771 oss_periods = s;
772
773 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
774 if (s < 2)
775 s = 2;
776 if (oss_periods < s)
777 oss_periods = s;
778
779 while (oss_period_size * oss_periods > oss_buffer_size)
780 oss_period_size /= 2;
781
782 snd_assert(oss_period_size >= 16, return -EINVAL);
783 runtime->oss.period_bytes = oss_period_size;
784 runtime->oss.period_frames = 1;
785 runtime->oss.periods = oss_periods;
786 return 0;
787 }
788
789 static int choose_rate(struct snd_pcm_substream *substream,
790 struct snd_pcm_hw_params *params, unsigned int best_rate)
791 {
792 struct snd_interval *it;
793 struct snd_pcm_hw_params *save;
794 unsigned int rate, prev;
795
796 save = kmalloc(sizeof(*save), GFP_KERNEL);
797 if (save == NULL)
798 return -ENOMEM;
799 *save = *params;
800 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
801
802 /* try multiples of the best rate */
803 rate = best_rate;
804 for (;;) {
805 if (it->max < rate || (it->max == rate && it->openmax))
806 break;
807 if (it->min < rate || (it->min == rate && !it->openmin)) {
808 int ret;
809 ret = snd_pcm_hw_param_set(substream, params,
810 SNDRV_PCM_HW_PARAM_RATE,
811 rate, 0);
812 if (ret == (int)rate) {
813 kfree(save);
814 return rate;
815 }
816 *params = *save;
817 }
818 prev = rate;
819 rate += best_rate;
820 if (rate <= prev)
821 break;
822 }
823
824 /* not found, use the nearest rate */
825 kfree(save);
826 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
827 }
828
829 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
830 {
831 struct snd_pcm_runtime *runtime = substream->runtime;
832 struct snd_pcm_hw_params *params, *sparams;
833 struct snd_pcm_sw_params *sw_params;
834 ssize_t oss_buffer_size, oss_period_size;
835 size_t oss_frame_size;
836 int err;
837 int direct;
838 int format, sformat, n;
839 struct snd_mask sformat_mask;
840 struct snd_mask mask;
841
842 if (mutex_lock_interruptible(&runtime->oss.params_lock))
843 return -EINTR;
844 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
845 params = kmalloc(sizeof(*params), GFP_KERNEL);
846 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
847 if (!sw_params || !params || !sparams) {
848 snd_printd("No memory\n");
849 err = -ENOMEM;
850 goto failure;
851 }
852
853 if (atomic_read(&substream->mmap_count))
854 direct = 1;
855 else
856 direct = substream->oss.setup.direct;
857
858 _snd_pcm_hw_params_any(sparams);
859 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
860 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
861 snd_mask_none(&mask);
862 if (atomic_read(&substream->mmap_count))
863 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
864 else {
865 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
866 if (!direct)
867 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
868 }
869 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
870 if (err < 0) {
871 snd_printd("No usable accesses\n");
872 err = -EINVAL;
873 goto failure;
874 }
875 choose_rate(substream, sparams, runtime->oss.rate);
876 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
877
878 format = snd_pcm_oss_format_from(runtime->oss.format);
879
880 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
881 if (direct)
882 sformat = format;
883 else
884 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
885
886 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
887 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
888 if (snd_mask_test(&sformat_mask, sformat) &&
889 snd_pcm_oss_format_to(sformat) >= 0)
890 break;
891 }
892 if (sformat > SNDRV_PCM_FORMAT_LAST) {
893 snd_printd("Cannot find a format!!!\n");
894 err = -EINVAL;
895 goto failure;
896 }
897 }
898 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
899 snd_assert(err >= 0, goto failure);
900
901 if (direct) {
902 memcpy(params, sparams, sizeof(*params));
903 } else {
904 _snd_pcm_hw_params_any(params);
905 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
906 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
907 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
908 snd_pcm_oss_format_from(runtime->oss.format), 0);
909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
910 runtime->oss.channels, 0);
911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
912 runtime->oss.rate, 0);
913 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
914 params_access(params), params_format(params),
915 params_channels(params), params_rate(params));
916 }
917 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
918 params_access(sparams), params_format(sparams),
919 params_channels(sparams), params_rate(sparams));
920
921 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
922 params_channels(params) / 8;
923
924 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
925 snd_pcm_oss_plugin_clear(substream);
926 if (!direct) {
927 /* add necessary plugins */
928 snd_pcm_oss_plugin_clear(substream);
929 if ((err = snd_pcm_plug_format_plugins(substream,
930 params,
931 sparams)) < 0) {
932 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
933 snd_pcm_oss_plugin_clear(substream);
934 goto failure;
935 }
936 if (runtime->oss.plugin_first) {
937 struct snd_pcm_plugin *plugin;
938 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
939 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
940 snd_pcm_oss_plugin_clear(substream);
941 goto failure;
942 }
943 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
944 err = snd_pcm_plugin_append(plugin);
945 } else {
946 err = snd_pcm_plugin_insert(plugin);
947 }
948 if (err < 0) {
949 snd_pcm_oss_plugin_clear(substream);
950 goto failure;
951 }
952 }
953 }
954 #endif
955
956 err = snd_pcm_oss_period_size(substream, params, sparams);
957 if (err < 0)
958 goto failure;
959
960 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
961 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
962 snd_assert(err >= 0, goto failure);
963
964 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
965 runtime->oss.periods, NULL);
966 snd_assert(err >= 0, goto failure);
967
968 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
969
970 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
971 snd_printd("HW_PARAMS failed: %i\n", err);
972 goto failure;
973 }
974
975 memset(sw_params, 0, sizeof(*sw_params));
976 if (runtime->oss.trigger) {
977 sw_params->start_threshold = 1;
978 } else {
979 sw_params->start_threshold = runtime->boundary;
980 }
981 if (atomic_read(&substream->mmap_count) ||
982 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
983 sw_params->stop_threshold = runtime->boundary;
984 else
985 sw_params->stop_threshold = runtime->buffer_size;
986 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
987 sw_params->period_step = 1;
988 sw_params->sleep_min = 0;
989 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
990 1 : runtime->period_size;
991 if (atomic_read(&substream->mmap_count) ||
992 substream->oss.setup.nosilence) {
993 sw_params->silence_threshold = 0;
994 sw_params->silence_size = 0;
995 } else {
996 snd_pcm_uframes_t frames;
997 frames = runtime->period_size + 16;
998 if (frames > runtime->buffer_size)
999 frames = runtime->buffer_size;
1000 sw_params->silence_threshold = frames;
1001 sw_params->silence_size = frames;
1002 }
1003
1004 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1005 snd_printd("SW_PARAMS failed: %i\n", err);
1006 goto failure;
1007 }
1008
1009 runtime->oss.periods = params_periods(sparams);
1010 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1011 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
1012 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1013 if (runtime->oss.plugin_first) {
1014 err = snd_pcm_plug_alloc(substream, oss_period_size);
1015 if (err < 0)
1016 goto failure;
1017 }
1018 #endif
1019 oss_period_size *= oss_frame_size;
1020
1021 oss_buffer_size = oss_period_size * runtime->oss.periods;
1022 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
1023
1024 runtime->oss.period_bytes = oss_period_size;
1025 runtime->oss.buffer_bytes = oss_buffer_size;
1026
1027 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1028 runtime->oss.period_bytes,
1029 runtime->oss.buffer_bytes);
1030 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1031 params_period_size(sparams),
1032 params_buffer_size(sparams));
1033
1034 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1035 runtime->oss.channels = params_channels(params);
1036 runtime->oss.rate = params_rate(params);
1037
1038 runtime->oss.params = 0;
1039 runtime->oss.prepare = 1;
1040 vfree(runtime->oss.buffer);
1041 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1042 runtime->oss.buffer_used = 0;
1043 if (runtime->dma_area)
1044 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1045
1046 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1047
1048 err = 0;
1049 failure:
1050 kfree(sw_params);
1051 kfree(params);
1052 kfree(sparams);
1053 mutex_unlock(&runtime->oss.params_lock);
1054 return err;
1055 }
1056
1057 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1058 {
1059 int idx, err;
1060 struct snd_pcm_substream *asubstream = NULL, *substream;
1061
1062 for (idx = 0; idx < 2; idx++) {
1063 substream = pcm_oss_file->streams[idx];
1064 if (substream == NULL)
1065 continue;
1066 if (asubstream == NULL)
1067 asubstream = substream;
1068 if (substream->runtime->oss.params) {
1069 err = snd_pcm_oss_change_params(substream);
1070 if (err < 0)
1071 return err;
1072 }
1073 }
1074 snd_assert(asubstream != NULL, return -EIO);
1075 if (r_substream)
1076 *r_substream = asubstream;
1077 return 0;
1078 }
1079
1080 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1081 {
1082 int err;
1083 struct snd_pcm_runtime *runtime = substream->runtime;
1084
1085 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1086 if (err < 0) {
1087 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1088 return err;
1089 }
1090 runtime->oss.prepare = 0;
1091 runtime->oss.prev_hw_ptr_interrupt = 0;
1092 runtime->oss.period_ptr = 0;
1093 runtime->oss.buffer_used = 0;
1094
1095 return 0;
1096 }
1097
1098 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1099 {
1100 struct snd_pcm_runtime *runtime;
1101 int err;
1102
1103 if (substream == NULL)
1104 return 0;
1105 runtime = substream->runtime;
1106 if (runtime->oss.params) {
1107 err = snd_pcm_oss_change_params(substream);
1108 if (err < 0)
1109 return err;
1110 }
1111 if (runtime->oss.prepare) {
1112 err = snd_pcm_oss_prepare(substream);
1113 if (err < 0)
1114 return err;
1115 }
1116 return 0;
1117 }
1118
1119 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1120 {
1121 struct snd_pcm_runtime *runtime;
1122 snd_pcm_uframes_t frames;
1123 int err = 0;
1124
1125 while (1) {
1126 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1127 if (err < 0)
1128 break;
1129 runtime = substream->runtime;
1130 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1131 break;
1132 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1133 /* until avail(delay) <= buffer_size */
1134 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1135 frames /= runtime->period_size;
1136 frames *= runtime->period_size;
1137 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1138 if (err < 0)
1139 break;
1140 }
1141 return err;
1142 }
1143
1144 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1145 {
1146 struct snd_pcm_runtime *runtime = substream->runtime;
1147 int ret;
1148 while (1) {
1149 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1150 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1151 #ifdef OSS_DEBUG
1152 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1153 printk("pcm_oss: write: recovering from XRUN\n");
1154 else
1155 printk("pcm_oss: write: recovering from SUSPEND\n");
1156 #endif
1157 ret = snd_pcm_oss_prepare(substream);
1158 if (ret < 0)
1159 break;
1160 }
1161 if (in_kernel) {
1162 mm_segment_t fs;
1163 fs = snd_enter_user();
1164 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1165 snd_leave_user(fs);
1166 } else {
1167 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1168 }
1169 if (ret != -EPIPE && ret != -ESTRPIPE)
1170 break;
1171 /* test, if we can't store new data, because the stream */
1172 /* has not been started */
1173 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1174 return -EAGAIN;
1175 }
1176 return ret;
1177 }
1178
1179 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1180 {
1181 struct snd_pcm_runtime *runtime = substream->runtime;
1182 snd_pcm_sframes_t delay;
1183 int ret;
1184 while (1) {
1185 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1186 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1187 #ifdef OSS_DEBUG
1188 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1189 printk("pcm_oss: read: recovering from XRUN\n");
1190 else
1191 printk("pcm_oss: read: recovering from SUSPEND\n");
1192 #endif
1193 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1194 if (ret < 0)
1195 break;
1196 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1197 ret = snd_pcm_oss_prepare(substream);
1198 if (ret < 0)
1199 break;
1200 }
1201 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1202 if (ret < 0)
1203 break;
1204 if (in_kernel) {
1205 mm_segment_t fs;
1206 fs = snd_enter_user();
1207 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1208 snd_leave_user(fs);
1209 } else {
1210 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1211 }
1212 if (ret == -EPIPE) {
1213 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1214 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1215 if (ret < 0)
1216 break;
1217 }
1218 continue;
1219 }
1220 if (ret != -ESTRPIPE)
1221 break;
1222 }
1223 return ret;
1224 }
1225
1226 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1227 {
1228 struct snd_pcm_runtime *runtime = substream->runtime;
1229 int ret;
1230 while (1) {
1231 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1232 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1233 #ifdef OSS_DEBUG
1234 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1235 printk("pcm_oss: writev: recovering from XRUN\n");
1236 else
1237 printk("pcm_oss: writev: recovering from SUSPEND\n");
1238 #endif
1239 ret = snd_pcm_oss_prepare(substream);
1240 if (ret < 0)
1241 break;
1242 }
1243 if (in_kernel) {
1244 mm_segment_t fs;
1245 fs = snd_enter_user();
1246 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1247 snd_leave_user(fs);
1248 } else {
1249 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1250 }
1251 if (ret != -EPIPE && ret != -ESTRPIPE)
1252 break;
1253
1254 /* test, if we can't store new data, because the stream */
1255 /* has not been started */
1256 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1257 return -EAGAIN;
1258 }
1259 return ret;
1260 }
1261
1262 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1263 {
1264 struct snd_pcm_runtime *runtime = substream->runtime;
1265 int ret;
1266 while (1) {
1267 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1268 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1269 #ifdef OSS_DEBUG
1270 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1271 printk("pcm_oss: readv: recovering from XRUN\n");
1272 else
1273 printk("pcm_oss: readv: recovering from SUSPEND\n");
1274 #endif
1275 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1276 if (ret < 0)
1277 break;
1278 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1279 ret = snd_pcm_oss_prepare(substream);
1280 if (ret < 0)
1281 break;
1282 }
1283 if (in_kernel) {
1284 mm_segment_t fs;
1285 fs = snd_enter_user();
1286 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1287 snd_leave_user(fs);
1288 } else {
1289 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1290 }
1291 if (ret != -EPIPE && ret != -ESTRPIPE)
1292 break;
1293 }
1294 return ret;
1295 }
1296
1297 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1298 {
1299 struct snd_pcm_runtime *runtime = substream->runtime;
1300 snd_pcm_sframes_t frames, frames1;
1301 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1302 if (runtime->oss.plugin_first) {
1303 struct snd_pcm_plugin_channel *channels;
1304 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1305 if (!in_kernel) {
1306 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1307 return -EFAULT;
1308 buf = runtime->oss.buffer;
1309 }
1310 frames = bytes / oss_frame_bytes;
1311 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1312 if (frames1 < 0)
1313 return frames1;
1314 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1315 if (frames1 <= 0)
1316 return frames1;
1317 bytes = frames1 * oss_frame_bytes;
1318 } else
1319 #endif
1320 {
1321 frames = bytes_to_frames(runtime, bytes);
1322 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1323 if (frames1 <= 0)
1324 return frames1;
1325 bytes = frames_to_bytes(runtime, frames1);
1326 }
1327 return bytes;
1328 }
1329
1330 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1331 {
1332 size_t xfer = 0;
1333 ssize_t tmp;
1334 struct snd_pcm_runtime *runtime = substream->runtime;
1335
1336 if (atomic_read(&substream->mmap_count))
1337 return -ENXIO;
1338
1339 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1340 return tmp;
1341 mutex_lock(&runtime->oss.params_lock);
1342 while (bytes > 0) {
1343 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1344 tmp = bytes;
1345 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1346 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1347 if (tmp > 0) {
1348 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1349 tmp = -EFAULT;
1350 goto err;
1351 }
1352 }
1353 runtime->oss.buffer_used += tmp;
1354 buf += tmp;
1355 bytes -= tmp;
1356 xfer += tmp;
1357 if (substream->oss.setup.partialfrag ||
1358 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1359 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1360 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1361 if (tmp <= 0)
1362 goto err;
1363 runtime->oss.bytes += tmp;
1364 runtime->oss.period_ptr += tmp;
1365 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1366 if (runtime->oss.period_ptr == 0 ||
1367 runtime->oss.period_ptr == runtime->oss.buffer_used)
1368 runtime->oss.buffer_used = 0;
1369 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1370 tmp = -EAGAIN;
1371 goto err;
1372 }
1373 }
1374 } else {
1375 tmp = snd_pcm_oss_write2(substream,
1376 (const char __force *)buf,
1377 runtime->oss.period_bytes, 0);
1378 if (tmp <= 0)
1379 goto err;
1380 runtime->oss.bytes += tmp;
1381 buf += tmp;
1382 bytes -= tmp;
1383 xfer += tmp;
1384 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1385 tmp != runtime->oss.period_bytes)
1386 break;
1387 }
1388 }
1389 mutex_unlock(&runtime->oss.params_lock);
1390 return xfer;
1391
1392 err:
1393 mutex_unlock(&runtime->oss.params_lock);
1394 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1395 }
1396
1397 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1398 {
1399 struct snd_pcm_runtime *runtime = substream->runtime;
1400 snd_pcm_sframes_t frames, frames1;
1401 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1402 char __user *final_dst = (char __user *)buf;
1403 if (runtime->oss.plugin_first) {
1404 struct snd_pcm_plugin_channel *channels;
1405 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1406 if (!in_kernel)
1407 buf = runtime->oss.buffer;
1408 frames = bytes / oss_frame_bytes;
1409 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1410 if (frames1 < 0)
1411 return frames1;
1412 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1413 if (frames1 <= 0)
1414 return frames1;
1415 bytes = frames1 * oss_frame_bytes;
1416 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1417 return -EFAULT;
1418 } else
1419 #endif
1420 {
1421 frames = bytes_to_frames(runtime, bytes);
1422 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1423 if (frames1 <= 0)
1424 return frames1;
1425 bytes = frames_to_bytes(runtime, frames1);
1426 }
1427 return bytes;
1428 }
1429
1430 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1431 {
1432 size_t xfer = 0;
1433 ssize_t tmp;
1434 struct snd_pcm_runtime *runtime = substream->runtime;
1435
1436 if (atomic_read(&substream->mmap_count))
1437 return -ENXIO;
1438
1439 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1440 return tmp;
1441 mutex_lock(&runtime->oss.params_lock);
1442 while (bytes > 0) {
1443 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1444 if (runtime->oss.buffer_used == 0) {
1445 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1446 if (tmp <= 0)
1447 goto err;
1448 runtime->oss.bytes += tmp;
1449 runtime->oss.period_ptr = tmp;
1450 runtime->oss.buffer_used = tmp;
1451 }
1452 tmp = bytes;
1453 if ((size_t) tmp > runtime->oss.buffer_used)
1454 tmp = runtime->oss.buffer_used;
1455 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1456 tmp = -EFAULT;
1457 goto err;
1458 }
1459 buf += tmp;
1460 bytes -= tmp;
1461 xfer += tmp;
1462 runtime->oss.buffer_used -= tmp;
1463 } else {
1464 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1465 runtime->oss.period_bytes, 0);
1466 if (tmp <= 0)
1467 goto err;
1468 runtime->oss.bytes += tmp;
1469 buf += tmp;
1470 bytes -= tmp;
1471 xfer += tmp;
1472 }
1473 }
1474 mutex_unlock(&runtime->oss.params_lock);
1475 return xfer;
1476
1477 err:
1478 mutex_unlock(&runtime->oss.params_lock);
1479 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1480 }
1481
1482 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1483 {
1484 struct snd_pcm_substream *substream;
1485
1486 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1487 if (substream != NULL) {
1488 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1489 substream->runtime->oss.prepare = 1;
1490 }
1491 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1492 if (substream != NULL) {
1493 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1494 substream->runtime->oss.prepare = 1;
1495 }
1496 return 0;
1497 }
1498
1499 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1500 {
1501 struct snd_pcm_substream *substream;
1502 int err;
1503
1504 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1505 if (substream != NULL) {
1506 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1507 return err;
1508 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1509 }
1510 /* note: all errors from the start action are ignored */
1511 /* OSS apps do not know, how to handle them */
1512 return 0;
1513 }
1514
1515 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1516 {
1517 struct snd_pcm_runtime *runtime;
1518 ssize_t result = 0;
1519 long res;
1520 wait_queue_t wait;
1521
1522 runtime = substream->runtime;
1523 init_waitqueue_entry(&wait, current);
1524 add_wait_queue(&runtime->sleep, &wait);
1525 #ifdef OSS_DEBUG
1526 printk("sync1: size = %li\n", size);
1527 #endif
1528 while (1) {
1529 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1530 if (result > 0) {
1531 runtime->oss.buffer_used = 0;
1532 result = 0;
1533 break;
1534 }
1535 if (result != 0 && result != -EAGAIN)
1536 break;
1537 result = 0;
1538 set_current_state(TASK_INTERRUPTIBLE);
1539 snd_pcm_stream_lock_irq(substream);
1540 res = runtime->status->state;
1541 snd_pcm_stream_unlock_irq(substream);
1542 if (res != SNDRV_PCM_STATE_RUNNING) {
1543 set_current_state(TASK_RUNNING);
1544 break;
1545 }
1546 res = schedule_timeout(10 * HZ);
1547 if (signal_pending(current)) {
1548 result = -ERESTARTSYS;
1549 break;
1550 }
1551 if (res == 0) {
1552 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1553 result = -EIO;
1554 break;
1555 }
1556 }
1557 remove_wait_queue(&runtime->sleep, &wait);
1558 return result;
1559 }
1560
1561 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1562 {
1563 int err = 0;
1564 unsigned int saved_f_flags;
1565 struct snd_pcm_substream *substream;
1566 struct snd_pcm_runtime *runtime;
1567 snd_pcm_format_t format;
1568 unsigned long width;
1569 size_t size;
1570
1571 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1572 if (substream != NULL) {
1573 runtime = substream->runtime;
1574 if (atomic_read(&substream->mmap_count))
1575 goto __direct;
1576 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1577 return err;
1578 format = snd_pcm_oss_format_from(runtime->oss.format);
1579 width = snd_pcm_format_physical_width(format);
1580 mutex_lock(&runtime->oss.params_lock);
1581 if (runtime->oss.buffer_used > 0) {
1582 #ifdef OSS_DEBUG
1583 printk("sync: buffer_used\n");
1584 #endif
1585 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1586 snd_pcm_format_set_silence(format,
1587 runtime->oss.buffer + runtime->oss.buffer_used,
1588 size);
1589 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1590 if (err < 0) {
1591 mutex_unlock(&runtime->oss.params_lock);
1592 return err;
1593 }
1594 } else if (runtime->oss.period_ptr > 0) {
1595 #ifdef OSS_DEBUG
1596 printk("sync: period_ptr\n");
1597 #endif
1598 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1599 snd_pcm_format_set_silence(format,
1600 runtime->oss.buffer,
1601 size * 8 / width);
1602 err = snd_pcm_oss_sync1(substream, size);
1603 if (err < 0) {
1604 mutex_unlock(&runtime->oss.params_lock);
1605 return err;
1606 }
1607 }
1608 /*
1609 * The ALSA's period might be a bit large than OSS one.
1610 * Fill the remain portion of ALSA period with zeros.
1611 */
1612 size = runtime->control->appl_ptr % runtime->period_size;
1613 if (size > 0) {
1614 size = runtime->period_size - size;
1615 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1616 size = (runtime->frame_bits * size) / 8;
1617 while (size > 0) {
1618 mm_segment_t fs;
1619 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1620 size -= size1;
1621 size1 *= 8;
1622 size1 /= runtime->sample_bits;
1623 snd_pcm_format_set_silence(runtime->format,
1624 runtime->oss.buffer,
1625 size1);
1626 fs = snd_enter_user();
1627 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1628 snd_leave_user(fs);
1629 }
1630 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1631 void __user *buffers[runtime->channels];
1632 memset(buffers, 0, runtime->channels * sizeof(void *));
1633 snd_pcm_lib_writev(substream, buffers, size);
1634 }
1635 }
1636 mutex_unlock(&runtime->oss.params_lock);
1637 /*
1638 * finish sync: drain the buffer
1639 */
1640 __direct:
1641 saved_f_flags = substream->f_flags;
1642 substream->f_flags &= ~O_NONBLOCK;
1643 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1644 substream->f_flags = saved_f_flags;
1645 if (err < 0)
1646 return err;
1647 runtime->oss.prepare = 1;
1648 }
1649
1650 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1651 if (substream != NULL) {
1652 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1653 return err;
1654 runtime = substream->runtime;
1655 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1656 if (err < 0)
1657 return err;
1658 runtime->oss.buffer_used = 0;
1659 runtime->oss.prepare = 1;
1660 }
1661 return 0;
1662 }
1663
1664 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1665 {
1666 int idx;
1667
1668 for (idx = 1; idx >= 0; --idx) {
1669 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1670 struct snd_pcm_runtime *runtime;
1671 if (substream == NULL)
1672 continue;
1673 runtime = substream->runtime;
1674 if (rate < 1000)
1675 rate = 1000;
1676 else if (rate > 192000)
1677 rate = 192000;
1678 if (runtime->oss.rate != rate) {
1679 runtime->oss.params = 1;
1680 runtime->oss.rate = rate;
1681 }
1682 }
1683 return snd_pcm_oss_get_rate(pcm_oss_file);
1684 }
1685
1686 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1687 {
1688 struct snd_pcm_substream *substream;
1689 int err;
1690
1691 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1692 return err;
1693 return substream->runtime->oss.rate;
1694 }
1695
1696 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1697 {
1698 int idx;
1699 if (channels < 1)
1700 channels = 1;
1701 if (channels > 128)
1702 return -EINVAL;
1703 for (idx = 1; idx >= 0; --idx) {
1704 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1705 struct snd_pcm_runtime *runtime;
1706 if (substream == NULL)
1707 continue;
1708 runtime = substream->runtime;
1709 if (runtime->oss.channels != channels) {
1710 runtime->oss.params = 1;
1711 runtime->oss.channels = channels;
1712 }
1713 }
1714 return snd_pcm_oss_get_channels(pcm_oss_file);
1715 }
1716
1717 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1718 {
1719 struct snd_pcm_substream *substream;
1720 int err;
1721
1722 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1723 return err;
1724 return substream->runtime->oss.channels;
1725 }
1726
1727 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1728 {
1729 struct snd_pcm_substream *substream;
1730 int err;
1731
1732 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1733 return err;
1734 return substream->runtime->oss.period_bytes;
1735 }
1736
1737 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1738 {
1739 struct snd_pcm_substream *substream;
1740 int err;
1741 int direct;
1742 struct snd_pcm_hw_params *params;
1743 unsigned int formats = 0;
1744 struct snd_mask format_mask;
1745 int fmt;
1746
1747 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1748 return err;
1749 if (atomic_read(&substream->mmap_count))
1750 direct = 1;
1751 else
1752 direct = substream->oss.setup.direct;
1753 if (!direct)
1754 return AFMT_MU_LAW | AFMT_U8 |
1755 AFMT_S16_LE | AFMT_S16_BE |
1756 AFMT_S8 | AFMT_U16_LE |
1757 AFMT_U16_BE |
1758 AFMT_S32_LE | AFMT_S32_BE |
1759 AFMT_S24_LE | AFMT_S24_LE |
1760 AFMT_S24_PACKED;
1761 params = kmalloc(sizeof(*params), GFP_KERNEL);
1762 if (!params)
1763 return -ENOMEM;
1764 _snd_pcm_hw_params_any(params);
1765 err = snd_pcm_hw_refine(substream, params);
1766 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1767 kfree(params);
1768 snd_assert(err >= 0, return err);
1769 for (fmt = 0; fmt < 32; ++fmt) {
1770 if (snd_mask_test(&format_mask, fmt)) {
1771 int f = snd_pcm_oss_format_to(fmt);
1772 if (f >= 0)
1773 formats |= f;
1774 }
1775 }
1776 return formats;
1777 }
1778
1779 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1780 {
1781 int formats, idx;
1782
1783 if (format != AFMT_QUERY) {
1784 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1785 if (formats < 0)
1786 return formats;
1787 if (!(formats & format))
1788 format = AFMT_U8;
1789 for (idx = 1; idx >= 0; --idx) {
1790 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1791 struct snd_pcm_runtime *runtime;
1792 if (substream == NULL)
1793 continue;
1794 runtime = substream->runtime;
1795 if (runtime->oss.format != format) {
1796 runtime->oss.params = 1;
1797 runtime->oss.format = format;
1798 }
1799 }
1800 }
1801 return snd_pcm_oss_get_format(pcm_oss_file);
1802 }
1803
1804 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1805 {
1806 struct snd_pcm_substream *substream;
1807 int err;
1808
1809 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1810 return err;
1811 return substream->runtime->oss.format;
1812 }
1813
1814 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1815 {
1816 struct snd_pcm_runtime *runtime;
1817
1818 if (substream == NULL)
1819 return 0;
1820 runtime = substream->runtime;
1821 if (subdivide == 0) {
1822 subdivide = runtime->oss.subdivision;
1823 if (subdivide == 0)
1824 subdivide = 1;
1825 return subdivide;
1826 }
1827 if (runtime->oss.subdivision || runtime->oss.fragshift)
1828 return -EINVAL;
1829 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1830 subdivide != 8 && subdivide != 16)
1831 return -EINVAL;
1832 runtime->oss.subdivision = subdivide;
1833 runtime->oss.params = 1;
1834 return subdivide;
1835 }
1836
1837 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1838 {
1839 int err = -EINVAL, idx;
1840
1841 for (idx = 1; idx >= 0; --idx) {
1842 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1843 if (substream == NULL)
1844 continue;
1845 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1846 return err;
1847 }
1848 return err;
1849 }
1850
1851 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1852 {
1853 struct snd_pcm_runtime *runtime;
1854
1855 if (substream == NULL)
1856 return 0;
1857 runtime = substream->runtime;
1858 if (runtime->oss.subdivision || runtime->oss.fragshift)
1859 return -EINVAL;
1860 runtime->oss.fragshift = val & 0xffff;
1861 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1862 if (runtime->oss.fragshift < 4) /* < 16 */
1863 runtime->oss.fragshift = 4;
1864 if (runtime->oss.maxfrags < 2)
1865 runtime->oss.maxfrags = 2;
1866 runtime->oss.params = 1;
1867 return 0;
1868 }
1869
1870 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1871 {
1872 int err = -EINVAL, idx;
1873
1874 for (idx = 1; idx >= 0; --idx) {
1875 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1876 if (substream == NULL)
1877 continue;
1878 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1879 return err;
1880 }
1881 return err;
1882 }
1883
1884 static int snd_pcm_oss_nonblock(struct file * file)
1885 {
1886 file->f_flags |= O_NONBLOCK;
1887 return 0;
1888 }
1889
1890 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1891 {
1892
1893 if (substream == NULL) {
1894 res &= ~DSP_CAP_DUPLEX;
1895 return res;
1896 }
1897 #ifdef DSP_CAP_MULTI
1898 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1899 if (substream->pstr->substream_count > 1)
1900 res |= DSP_CAP_MULTI;
1901 #endif
1902 /* DSP_CAP_REALTIME is set all times: */
1903 /* all ALSA drivers can return actual pointer in ring buffer */
1904 #if defined(DSP_CAP_REALTIME) && 0
1905 {
1906 struct snd_pcm_runtime *runtime = substream->runtime;
1907 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1908 res &= ~DSP_CAP_REALTIME;
1909 }
1910 #endif
1911 return res;
1912 }
1913
1914 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1915 {
1916 int result, idx;
1917
1918 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1919 for (idx = 0; idx < 2; idx++) {
1920 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1921 result = snd_pcm_oss_get_caps1(substream, result);
1922 }
1923 result |= 0x0001; /* revision - same as SB AWE 64 */
1924 return result;
1925 }
1926
1927 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1928 {
1929 struct snd_pcm_runtime *runtime = substream->runtime;
1930 snd_pcm_uframes_t appl_ptr;
1931 appl_ptr = hw_ptr + runtime->buffer_size;
1932 appl_ptr %= runtime->boundary;
1933 runtime->control->appl_ptr = appl_ptr;
1934 }
1935
1936 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1937 {
1938 struct snd_pcm_runtime *runtime;
1939 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1940 int err, cmd;
1941
1942 #ifdef OSS_DEBUG
1943 printk("pcm_oss: trigger = 0x%x\n", trigger);
1944 #endif
1945
1946 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1947 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1948
1949 if (psubstream) {
1950 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1951 return err;
1952 }
1953 if (csubstream) {
1954 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1955 return err;
1956 }
1957 if (psubstream) {
1958 runtime = psubstream->runtime;
1959 if (trigger & PCM_ENABLE_OUTPUT) {
1960 if (runtime->oss.trigger)
1961 goto _skip1;
1962 if (atomic_read(&psubstream->mmap_count))
1963 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1964 runtime->oss.trigger = 1;
1965 runtime->start_threshold = 1;
1966 cmd = SNDRV_PCM_IOCTL_START;
1967 } else {
1968 if (!runtime->oss.trigger)
1969 goto _skip1;
1970 runtime->oss.trigger = 0;
1971 runtime->start_threshold = runtime->boundary;
1972 cmd = SNDRV_PCM_IOCTL_DROP;
1973 runtime->oss.prepare = 1;
1974 }
1975 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1976 if (err < 0)
1977 return err;
1978 }
1979 _skip1:
1980 if (csubstream) {
1981 runtime = csubstream->runtime;
1982 if (trigger & PCM_ENABLE_INPUT) {
1983 if (runtime->oss.trigger)
1984 goto _skip2;
1985 runtime->oss.trigger = 1;
1986 runtime->start_threshold = 1;
1987 cmd = SNDRV_PCM_IOCTL_START;
1988 } else {
1989 if (!runtime->oss.trigger)
1990 goto _skip2;
1991 runtime->oss.trigger = 0;
1992 runtime->start_threshold = runtime->boundary;
1993 cmd = SNDRV_PCM_IOCTL_DROP;
1994 runtime->oss.prepare = 1;
1995 }
1996 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1997 if (err < 0)
1998 return err;
1999 }
2000 _skip2:
2001 return 0;
2002 }
2003
2004 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2005 {
2006 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2007 int result = 0;
2008
2009 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2010 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2011 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2012 result |= PCM_ENABLE_OUTPUT;
2013 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2014 result |= PCM_ENABLE_INPUT;
2015 return result;
2016 }
2017
2018 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2019 {
2020 struct snd_pcm_substream *substream;
2021 struct snd_pcm_runtime *runtime;
2022 snd_pcm_sframes_t delay;
2023 int err;
2024
2025 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2026 if (substream == NULL)
2027 return -EINVAL;
2028 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2029 return err;
2030 runtime = substream->runtime;
2031 if (runtime->oss.params || runtime->oss.prepare)
2032 return 0;
2033 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2034 if (err == -EPIPE)
2035 delay = 0; /* hack for broken OSS applications */
2036 else if (err < 0)
2037 return err;
2038 return snd_pcm_oss_bytes(substream, delay);
2039 }
2040
2041 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2042 {
2043 struct snd_pcm_substream *substream;
2044 struct snd_pcm_runtime *runtime;
2045 snd_pcm_sframes_t delay;
2046 int fixup;
2047 struct count_info info;
2048 int err;
2049
2050 if (_info == NULL)
2051 return -EFAULT;
2052 substream = pcm_oss_file->streams[stream];
2053 if (substream == NULL)
2054 return -EINVAL;
2055 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2056 return err;
2057 runtime = substream->runtime;
2058 if (runtime->oss.params || runtime->oss.prepare) {
2059 memset(&info, 0, sizeof(info));
2060 if (copy_to_user(_info, &info, sizeof(info)))
2061 return -EFAULT;
2062 return 0;
2063 }
2064 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2065 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2066 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2067 err = 0;
2068 delay = 0;
2069 fixup = 0;
2070 } else {
2071 fixup = runtime->oss.buffer_used;
2072 }
2073 } else {
2074 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2075 fixup = -runtime->oss.buffer_used;
2076 }
2077 if (err < 0)
2078 return err;
2079 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2080 if (atomic_read(&substream->mmap_count)) {
2081 snd_pcm_sframes_t n;
2082 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2083 if (n < 0)
2084 n += runtime->boundary;
2085 info.blocks = n / runtime->period_size;
2086 runtime->oss.prev_hw_ptr_interrupt = delay;
2087 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2088 snd_pcm_oss_simulate_fill(substream, delay);
2089 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2090 } else {
2091 delay = snd_pcm_oss_bytes(substream, delay);
2092 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2093 if (substream->oss.setup.buggyptr)
2094 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2095 else
2096 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2097 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2098 } else {
2099 delay += fixup;
2100 info.blocks = delay / runtime->oss.period_bytes;
2101 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2102 }
2103 }
2104 if (copy_to_user(_info, &info, sizeof(info)))
2105 return -EFAULT;
2106 return 0;
2107 }
2108
2109 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2110 {
2111 struct snd_pcm_substream *substream;
2112 struct snd_pcm_runtime *runtime;
2113 snd_pcm_sframes_t avail;
2114 int fixup;
2115 struct audio_buf_info info;
2116 int err;
2117
2118 if (_info == NULL)
2119 return -EFAULT;
2120 substream = pcm_oss_file->streams[stream];
2121 if (substream == NULL)
2122 return -EINVAL;
2123 runtime = substream->runtime;
2124
2125 if (runtime->oss.params &&
2126 (err = snd_pcm_oss_change_params(substream)) < 0)
2127 return err;
2128
2129 info.fragsize = runtime->oss.period_bytes;
2130 info.fragstotal = runtime->periods;
2131 if (runtime->oss.prepare) {
2132 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2133 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2134 info.fragments = runtime->oss.periods;
2135 } else {
2136 info.bytes = 0;
2137 info.fragments = 0;
2138 }
2139 } else {
2140 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2141 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2142 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2143 avail = runtime->buffer_size;
2144 err = 0;
2145 fixup = 0;
2146 } else {
2147 avail = runtime->buffer_size - avail;
2148 fixup = -runtime->oss.buffer_used;
2149 }
2150 } else {
2151 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2152 fixup = runtime->oss.buffer_used;
2153 }
2154 if (err < 0)
2155 return err;
2156 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2157 info.fragments = info.bytes / runtime->oss.period_bytes;
2158 }
2159
2160 #ifdef OSS_DEBUG
2161 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2162 #endif
2163 if (copy_to_user(_info, &info, sizeof(info)))
2164 return -EFAULT;
2165 return 0;
2166 }
2167
2168 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2169 {
2170 // it won't be probably implemented
2171 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2172 return -EINVAL;
2173 }
2174
2175 static const char *strip_task_path(const char *path)
2176 {
2177 const char *ptr, *ptrl = NULL;
2178 for (ptr = path; *ptr; ptr++) {
2179 if (*ptr == '/')
2180 ptrl = ptr + 1;
2181 }
2182 return ptrl;
2183 }
2184
2185 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2186 const char *task_name,
2187 struct snd_pcm_oss_setup *rsetup)
2188 {
2189 struct snd_pcm_oss_setup *setup;
2190
2191 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2192 do {
2193 for (setup = pcm->streams[stream].oss.setup_list; setup;
2194 setup = setup->next) {
2195 if (!strcmp(setup->task_name, task_name))
2196 goto out;
2197 }
2198 } while ((task_name = strip_task_path(task_name)) != NULL);
2199 out:
2200 if (setup)
2201 *rsetup = *setup;
2202 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2203 }
2204
2205 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2206 {
2207 struct snd_pcm_runtime *runtime;
2208 runtime = substream->runtime;
2209 vfree(runtime->oss.buffer);
2210 runtime->oss.buffer = NULL;
2211 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2212 snd_pcm_oss_plugin_clear(substream);
2213 #endif
2214 substream->oss.oss = 0;
2215 }
2216
2217 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2218 struct snd_pcm_oss_setup *setup,
2219 int minor)
2220 {
2221 struct snd_pcm_runtime *runtime;
2222
2223 substream->oss.oss = 1;
2224 substream->oss.setup = *setup;
2225 if (setup->nonblock)
2226 substream->f_flags |= O_NONBLOCK;
2227 else if (setup->block)
2228 substream->f_flags &= ~O_NONBLOCK;
2229 runtime = substream->runtime;
2230 runtime->oss.params = 1;
2231 runtime->oss.trigger = 1;
2232 runtime->oss.rate = 8000;
2233 mutex_init(&runtime->oss.params_lock);
2234 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2235 case SNDRV_MINOR_OSS_PCM_8:
2236 runtime->oss.format = AFMT_U8;
2237 break;
2238 case SNDRV_MINOR_OSS_PCM_16:
2239 runtime->oss.format = AFMT_S16_LE;
2240 break;
2241 default:
2242 runtime->oss.format = AFMT_MU_LAW;
2243 }
2244 runtime->oss.channels = 1;
2245 runtime->oss.fragshift = 0;
2246 runtime->oss.maxfrags = 0;
2247 runtime->oss.subdivision = 0;
2248 substream->pcm_release = snd_pcm_oss_release_substream;
2249 }
2250
2251 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2252 {
2253 int cidx;
2254 snd_assert(pcm_oss_file != NULL, return -ENXIO);
2255 for (cidx = 0; cidx < 2; ++cidx) {
2256 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2257 if (substream)
2258 snd_pcm_release_substream(substream);
2259 }
2260 kfree(pcm_oss_file);
2261 return 0;
2262 }
2263
2264 static int snd_pcm_oss_open_file(struct file *file,
2265 struct snd_pcm *pcm,
2266 struct snd_pcm_oss_file **rpcm_oss_file,
2267 int minor,
2268 struct snd_pcm_oss_setup *setup)
2269 {
2270 int idx, err;
2271 struct snd_pcm_oss_file *pcm_oss_file;
2272 struct snd_pcm_substream *substream;
2273 unsigned int f_mode = file->f_mode;
2274
2275 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2276 *rpcm_oss_file = NULL;
2277
2278 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2279 if (pcm_oss_file == NULL)
2280 return -ENOMEM;
2281
2282 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2283 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2284 f_mode = FMODE_WRITE;
2285
2286 file->f_flags &= ~O_APPEND;
2287 for (idx = 0; idx < 2; idx++) {
2288 if (setup[idx].disable)
2289 continue;
2290 if (! pcm->streams[idx].substream_count)
2291 continue; /* no matching substream */
2292 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2293 if (! (f_mode & FMODE_WRITE))
2294 continue;
2295 } else {
2296 if (! (f_mode & FMODE_READ))
2297 continue;
2298 }
2299 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2300 if (err < 0) {
2301 snd_pcm_oss_release_file(pcm_oss_file);
2302 return err;
2303 }
2304
2305 pcm_oss_file->streams[idx] = substream;
2306 substream->file = pcm_oss_file;
2307 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2308 }
2309
2310 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2311 snd_pcm_oss_release_file(pcm_oss_file);
2312 return -EINVAL;
2313 }
2314
2315 file->private_data = pcm_oss_file;
2316 *rpcm_oss_file = pcm_oss_file;
2317 return 0;
2318 }
2319
2320
2321 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2322 {
2323 unsigned int idx;
2324
2325 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2326 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2327 name[idx] = task->comm[idx];
2328 name[idx] = '\0';
2329 return 0;
2330 }
2331
2332 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2333 {
2334 int err;
2335 char task_name[32];
2336 struct snd_pcm *pcm;
2337 struct snd_pcm_oss_file *pcm_oss_file;
2338 struct snd_pcm_oss_setup setup[2];
2339 int nonblock;
2340 wait_queue_t wait;
2341
2342 pcm = snd_lookup_oss_minor_data(iminor(inode),
2343 SNDRV_OSS_DEVICE_TYPE_PCM);
2344 if (pcm == NULL) {
2345 err = -ENODEV;
2346 goto __error1;
2347 }
2348 err = snd_card_file_add(pcm->card, file);
2349 if (err < 0)
2350 goto __error1;
2351 if (!try_module_get(pcm->card->module)) {
2352 err = -EFAULT;
2353 goto __error2;
2354 }
2355 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2356 err = -EFAULT;
2357 goto __error;
2358 }
2359 memset(setup, 0, sizeof(setup));
2360 if (file->f_mode & FMODE_WRITE)
2361 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2362 task_name, &setup[0]);
2363 if (file->f_mode & FMODE_READ)
2364 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2365 task_name, &setup[1]);
2366
2367 nonblock = !!(file->f_flags & O_NONBLOCK);
2368 if (!nonblock)
2369 nonblock = nonblock_open;
2370
2371 init_waitqueue_entry(&wait, current);
2372 add_wait_queue(&pcm->open_wait, &wait);
2373 mutex_lock(&pcm->open_mutex);
2374 while (1) {
2375 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2376 iminor(inode), setup);
2377 if (err >= 0)
2378 break;
2379 if (err == -EAGAIN) {
2380 if (nonblock) {
2381 err = -EBUSY;
2382 break;
2383 }
2384 } else
2385 break;
2386 set_current_state(TASK_INTERRUPTIBLE);
2387 mutex_unlock(&pcm->open_mutex);
2388 schedule();
2389 mutex_lock(&pcm->open_mutex);
2390 if (signal_pending(current)) {
2391 err = -ERESTARTSYS;
2392 break;
2393 }
2394 }
2395 remove_wait_queue(&pcm->open_wait, &wait);
2396 mutex_unlock(&pcm->open_mutex);
2397 if (err < 0)
2398 goto __error;
2399 return err;
2400
2401 __error:
2402 module_put(pcm->card->module);
2403 __error2:
2404 snd_card_file_remove(pcm->card, file);
2405 __error1:
2406 return err;
2407 }
2408
2409 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2410 {
2411 struct snd_pcm *pcm;
2412 struct snd_pcm_substream *substream;
2413 struct snd_pcm_oss_file *pcm_oss_file;
2414
2415 pcm_oss_file = file->private_data;
2416 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2417 if (substream == NULL)
2418 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2419 snd_assert(substream != NULL, return -ENXIO);
2420 pcm = substream->pcm;
2421 if (!pcm->card->shutdown)
2422 snd_pcm_oss_sync(pcm_oss_file);
2423 mutex_lock(&pcm->open_mutex);
2424 snd_pcm_oss_release_file(pcm_oss_file);
2425 mutex_unlock(&pcm->open_mutex);
2426 wake_up(&pcm->open_wait);
2427 module_put(pcm->card->module);
2428 snd_card_file_remove(pcm->card, file);
2429 return 0;
2430 }
2431
2432 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2433 {
2434 struct snd_pcm_oss_file *pcm_oss_file;
2435 int __user *p = (int __user *)arg;
2436 int res;
2437
2438 pcm_oss_file = file->private_data;
2439 if (cmd == OSS_GETVERSION)
2440 return put_user(SNDRV_OSS_VERSION, p);
2441 if (cmd == OSS_ALSAEMULVER)
2442 return put_user(1, p);
2443 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2444 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2445 struct snd_pcm_substream *substream;
2446 int idx;
2447 for (idx = 0; idx < 2; ++idx) {
2448 substream = pcm_oss_file->streams[idx];
2449 if (substream != NULL)
2450 break;
2451 }
2452 snd_assert(substream != NULL, return -ENXIO);
2453 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2454 }
2455 #endif
2456 if (((cmd >> 8) & 0xff) != 'P')
2457 return -EINVAL;
2458 #ifdef OSS_DEBUG
2459 printk("pcm_oss: ioctl = 0x%x\n", cmd);
2460 #endif
2461 switch (cmd) {
2462 case SNDCTL_DSP_RESET:
2463 return snd_pcm_oss_reset(pcm_oss_file);
2464 case SNDCTL_DSP_SYNC:
2465 return snd_pcm_oss_sync(pcm_oss_file);
2466 case SNDCTL_DSP_SPEED:
2467 if (get_user(res, p))
2468 return -EFAULT;
2469 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2470 return res;
2471 return put_user(res, p);
2472 case SOUND_PCM_READ_RATE:
2473 res = snd_pcm_oss_get_rate(pcm_oss_file);
2474 if (res < 0)
2475 return res;
2476 return put_user(res, p);
2477 case SNDCTL_DSP_STEREO:
2478 if (get_user(res, p))
2479 return -EFAULT;
2480 res = res > 0 ? 2 : 1;
2481 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2482 return res;
2483 return put_user(--res, p);
2484 case SNDCTL_DSP_GETBLKSIZE:
2485 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2486 if (res < 0)
2487 return res;
2488 return put_user(res, p);
2489 case SNDCTL_DSP_SETFMT:
2490 if (get_user(res, p))
2491 return -EFAULT;
2492 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2493 if (res < 0)
2494 return res;
2495 return put_user(res, p);
2496 case SOUND_PCM_READ_BITS:
2497 res = snd_pcm_oss_get_format(pcm_oss_file);
2498 if (res < 0)
2499 return res;
2500 return put_user(res, p);
2501 case SNDCTL_DSP_CHANNELS:
2502 if (get_user(res, p))
2503 return -EFAULT;
2504 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2505 if (res < 0)
2506 return res;
2507 return put_user(res, p);
2508 case SOUND_PCM_READ_CHANNELS:
2509 res = snd_pcm_oss_get_channels(pcm_oss_file);
2510 if (res < 0)
2511 return res;
2512 return put_user(res, p);
2513 case SOUND_PCM_WRITE_FILTER:
2514 case SOUND_PCM_READ_FILTER:
2515 return -EIO;
2516 case SNDCTL_DSP_POST:
2517 return snd_pcm_oss_post(pcm_oss_file);
2518 case SNDCTL_DSP_SUBDIVIDE:
2519 if (get_user(res, p))
2520 return -EFAULT;
2521 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2522 if (res < 0)
2523 return res;
2524 return put_user(res, p);
2525 case SNDCTL_DSP_SETFRAGMENT:
2526 if (get_user(res, p))
2527 return -EFAULT;
2528 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2529 case SNDCTL_DSP_GETFMTS:
2530 res = snd_pcm_oss_get_formats(pcm_oss_file);
2531 if (res < 0)
2532 return res;
2533 return put_user(res, p);
2534 case SNDCTL_DSP_GETOSPACE:
2535 case SNDCTL_DSP_GETISPACE:
2536 return snd_pcm_oss_get_space(pcm_oss_file,
2537 cmd == SNDCTL_DSP_GETISPACE ?
2538 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2539 (struct audio_buf_info __user *) arg);
2540 case SNDCTL_DSP_NONBLOCK:
2541 return snd_pcm_oss_nonblock(file);
2542 case SNDCTL_DSP_GETCAPS:
2543 res = snd_pcm_oss_get_caps(pcm_oss_file);
2544 if (res < 0)
2545 return res;
2546 return put_user(res, p);
2547 case SNDCTL_DSP_GETTRIGGER:
2548 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2549 if (res < 0)
2550 return res;
2551 return put_user(res, p);
2552 case SNDCTL_DSP_SETTRIGGER:
2553 if (get_user(res, p))
2554 return -EFAULT;
2555 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2556 case SNDCTL_DSP_GETIPTR:
2557 case SNDCTL_DSP_GETOPTR:
2558 return snd_pcm_oss_get_ptr(pcm_oss_file,
2559 cmd == SNDCTL_DSP_GETIPTR ?
2560 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2561 (struct count_info __user *) arg);
2562 case SNDCTL_DSP_MAPINBUF:
2563 case SNDCTL_DSP_MAPOUTBUF:
2564 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2565 cmd == SNDCTL_DSP_MAPINBUF ?
2566 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2567 (struct buffmem_desc __user *) arg);
2568 case SNDCTL_DSP_SETSYNCRO:
2569 /* stop DMA now.. */
2570 return 0;
2571 case SNDCTL_DSP_SETDUPLEX:
2572 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2573 return 0;
2574 return -EIO;
2575 case SNDCTL_DSP_GETODELAY:
2576 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2577 if (res < 0) {
2578 /* it's for sure, some broken apps don't check for error codes */
2579 put_user(0, p);
2580 return res;
2581 }
2582 return put_user(res, p);
2583 case SNDCTL_DSP_PROFILE:
2584 return 0; /* silently ignore */
2585 default:
2586 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2587 }
2588 return -EINVAL;
2589 }
2590
2591 #ifdef CONFIG_COMPAT
2592 /* all compatible */
2593 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2594 #else
2595 #define snd_pcm_oss_ioctl_compat NULL
2596 #endif
2597
2598 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2599 {
2600 struct snd_pcm_oss_file *pcm_oss_file;
2601 struct snd_pcm_substream *substream;
2602
2603 pcm_oss_file = file->private_data;
2604 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2605 if (substream == NULL)
2606 return -ENXIO;
2607 substream->f_flags = file->f_flags & O_NONBLOCK;
2608 #ifndef OSS_DEBUG
2609 return snd_pcm_oss_read1(substream, buf, count);
2610 #else
2611 {
2612 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2613 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2614 return res;
2615 }
2616 #endif
2617 }
2618
2619 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2620 {
2621 struct snd_pcm_oss_file *pcm_oss_file;
2622 struct snd_pcm_substream *substream;
2623 long result;
2624
2625 pcm_oss_file = file->private_data;
2626 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2627 if (substream == NULL)
2628 return -ENXIO;
2629 substream->f_flags = file->f_flags & O_NONBLOCK;
2630 result = snd_pcm_oss_write1(substream, buf, count);
2631 #ifdef OSS_DEBUG
2632 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2633 #endif
2634 return result;
2635 }
2636
2637 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2638 {
2639 struct snd_pcm_runtime *runtime = substream->runtime;
2640 if (atomic_read(&substream->mmap_count))
2641 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2642 else
2643 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2644 }
2645
2646 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2647 {
2648 struct snd_pcm_runtime *runtime = substream->runtime;
2649 if (atomic_read(&substream->mmap_count))
2650 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2651 else
2652 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2653 }
2654
2655 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2656 {
2657 struct snd_pcm_oss_file *pcm_oss_file;
2658 unsigned int mask;
2659 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2660
2661 pcm_oss_file = file->private_data;
2662
2663 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2664 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2665
2666 mask = 0;
2667 if (psubstream != NULL) {
2668 struct snd_pcm_runtime *runtime = psubstream->runtime;
2669 poll_wait(file, &runtime->sleep, wait);
2670 snd_pcm_stream_lock_irq(psubstream);
2671 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2672 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2673 snd_pcm_oss_playback_ready(psubstream)))
2674 mask |= POLLOUT | POLLWRNORM;
2675 snd_pcm_stream_unlock_irq(psubstream);
2676 }
2677 if (csubstream != NULL) {
2678 struct snd_pcm_runtime *runtime = csubstream->runtime;
2679 snd_pcm_state_t ostate;
2680 poll_wait(file, &runtime->sleep, wait);
2681 snd_pcm_stream_lock_irq(csubstream);
2682 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2683 snd_pcm_oss_capture_ready(csubstream))
2684 mask |= POLLIN | POLLRDNORM;
2685 snd_pcm_stream_unlock_irq(csubstream);
2686 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2687 struct snd_pcm_oss_file ofile;
2688 memset(&ofile, 0, sizeof(ofile));
2689 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2690 runtime->oss.trigger = 0;
2691 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2692 }
2693 }
2694
2695 return mask;
2696 }
2697
2698 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2699 {
2700 struct snd_pcm_oss_file *pcm_oss_file;
2701 struct snd_pcm_substream *substream = NULL;
2702 struct snd_pcm_runtime *runtime;
2703 int err;
2704
2705 #ifdef OSS_DEBUG
2706 printk("pcm_oss: mmap begin\n");
2707 #endif
2708 pcm_oss_file = file->private_data;
2709 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2710 case VM_READ | VM_WRITE:
2711 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2712 if (substream)
2713 break;
2714 /* Fall through */
2715 case VM_READ:
2716 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2717 break;
2718 case VM_WRITE:
2719 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2720 break;
2721 default:
2722 return -EINVAL;
2723 }
2724 /* set VM_READ access as well to fix memset() routines that do
2725 reads before writes (to improve performance) */
2726 area->vm_flags |= VM_READ;
2727 if (substream == NULL)
2728 return -ENXIO;
2729 runtime = substream->runtime;
2730 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2731 return -EIO;
2732 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2733 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2734 else
2735 return -EIO;
2736
2737 if (runtime->oss.params) {
2738 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2739 return err;
2740 }
2741 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2742 if (runtime->oss.plugin_first != NULL)
2743 return -EIO;
2744 #endif
2745
2746 if (area->vm_pgoff != 0)
2747 return -EINVAL;
2748
2749 err = snd_pcm_mmap_data(substream, file, area);
2750 if (err < 0)
2751 return err;
2752 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2753 runtime->silence_threshold = 0;
2754 runtime->silence_size = 0;
2755 #ifdef OSS_DEBUG
2756 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2757 #endif
2758 /* In mmap mode we never stop */
2759 runtime->stop_threshold = runtime->boundary;
2760
2761 return 0;
2762 }
2763
2764 #ifdef CONFIG_SND_VERBOSE_PROCFS
2765 /*
2766 * /proc interface
2767 */
2768
2769 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2770 struct snd_info_buffer *buffer)
2771 {
2772 struct snd_pcm_str *pstr = entry->private_data;
2773 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2774 mutex_lock(&pstr->oss.setup_mutex);
2775 while (setup) {
2776 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2777 setup->task_name,
2778 setup->periods,
2779 setup->period_size,
2780 setup->disable ? " disable" : "",
2781 setup->direct ? " direct" : "",
2782 setup->block ? " block" : "",
2783 setup->nonblock ? " non-block" : "",
2784 setup->partialfrag ? " partial-frag" : "",
2785 setup->nosilence ? " no-silence" : "");
2786 setup = setup->next;
2787 }
2788 mutex_unlock(&pstr->oss.setup_mutex);
2789 }
2790
2791 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2792 {
2793 struct snd_pcm_oss_setup *setup, *setupn;
2794
2795 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2796 setup; setup = setupn) {
2797 setupn = setup->next;
2798 kfree(setup->task_name);
2799 kfree(setup);
2800 }
2801 pstr->oss.setup_list = NULL;
2802 }
2803
2804 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2805 struct snd_info_buffer *buffer)
2806 {
2807 struct snd_pcm_str *pstr = entry->private_data;
2808 char line[128], str[32], task_name[32], *ptr;
2809 int idx1;
2810 struct snd_pcm_oss_setup *setup, *setup1, template;
2811
2812 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2813 mutex_lock(&pstr->oss.setup_mutex);
2814 memset(&template, 0, sizeof(template));
2815 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2816 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2817 snd_pcm_oss_proc_free_setup_list(pstr);
2818 mutex_unlock(&pstr->oss.setup_mutex);
2819 continue;
2820 }
2821 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2822 if (!strcmp(setup->task_name, task_name)) {
2823 template = *setup;
2824 break;
2825 }
2826 }
2827 ptr = snd_info_get_str(str, ptr, sizeof(str));
2828 template.periods = simple_strtoul(str, NULL, 10);
2829 ptr = snd_info_get_str(str, ptr, sizeof(str));
2830 template.period_size = simple_strtoul(str, NULL, 10);
2831 for (idx1 = 31; idx1 >= 0; idx1--)
2832 if (template.period_size & (1 << idx1))
2833 break;
2834 for (idx1--; idx1 >= 0; idx1--)
2835 template.period_size &= ~(1 << idx1);
2836 do {
2837 ptr = snd_info_get_str(str, ptr, sizeof(str));
2838 if (!strcmp(str, "disable")) {
2839 template.disable = 1;
2840 } else if (!strcmp(str, "direct")) {
2841 template.direct = 1;
2842 } else if (!strcmp(str, "block")) {
2843 template.block = 1;
2844 } else if (!strcmp(str, "non-block")) {
2845 template.nonblock = 1;
2846 } else if (!strcmp(str, "partial-frag")) {
2847 template.partialfrag = 1;
2848 } else if (!strcmp(str, "no-silence")) {
2849 template.nosilence = 1;
2850 } else if (!strcmp(str, "buggy-ptr")) {
2851 template.buggyptr = 1;
2852 }
2853 } while (*str);
2854 if (setup == NULL) {
2855 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2856 if (! setup) {
2857 buffer->error = -ENOMEM;
2858 mutex_lock(&pstr->oss.setup_mutex);
2859 return;
2860 }
2861 if (pstr->oss.setup_list == NULL)
2862 pstr->oss.setup_list = setup;
2863 else {
2864 for (setup1 = pstr->oss.setup_list;
2865 setup1->next; setup1 = setup1->next);
2866 setup1->next = setup;
2867 }
2868 template.task_name = kstrdup(task_name, GFP_KERNEL);
2869 if (! template.task_name) {
2870 kfree(setup);
2871 buffer->error = -ENOMEM;
2872 mutex_lock(&pstr->oss.setup_mutex);
2873 return;
2874 }
2875 }
2876 *setup = template;
2877 mutex_unlock(&pstr->oss.setup_mutex);
2878 }
2879 }
2880
2881 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2882 {
2883 int stream;
2884 for (stream = 0; stream < 2; ++stream) {
2885 struct snd_info_entry *entry;
2886 struct snd_pcm_str *pstr = &pcm->streams[stream];
2887 if (pstr->substream_count == 0)
2888 continue;
2889 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2890 entry->content = SNDRV_INFO_CONTENT_TEXT;
2891 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2892 entry->c.text.read = snd_pcm_oss_proc_read;
2893 entry->c.text.write = snd_pcm_oss_proc_write;
2894 entry->private_data = pstr;
2895 if (snd_info_register(entry) < 0) {
2896 snd_info_free_entry(entry);
2897 entry = NULL;
2898 }
2899 }
2900 pstr->oss.proc_entry = entry;
2901 }
2902 }
2903
2904 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2905 {
2906 int stream;
2907 for (stream = 0; stream < 2; ++stream) {
2908 struct snd_pcm_str *pstr = &pcm->streams[stream];
2909 snd_info_free_entry(pstr->oss.proc_entry);
2910 pstr->oss.proc_entry = NULL;
2911 snd_pcm_oss_proc_free_setup_list(pstr);
2912 }
2913 }
2914 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2915 #define snd_pcm_oss_proc_init(pcm)
2916 #define snd_pcm_oss_proc_done(pcm)
2917 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2918
2919 /*
2920 * ENTRY functions
2921 */
2922
2923 static const struct file_operations snd_pcm_oss_f_reg =
2924 {
2925 .owner = THIS_MODULE,
2926 .read = snd_pcm_oss_read,
2927 .write = snd_pcm_oss_write,
2928 .open = snd_pcm_oss_open,
2929 .release = snd_pcm_oss_release,
2930 .poll = snd_pcm_oss_poll,
2931 .unlocked_ioctl = snd_pcm_oss_ioctl,
2932 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2933 .mmap = snd_pcm_oss_mmap,
2934 };
2935
2936 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2937 {
2938 char name[128];
2939 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2940 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2941 pcm->card, index, &snd_pcm_oss_f_reg,
2942 pcm, name) < 0) {
2943 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2944 pcm->card->number, pcm->device);
2945 }
2946 }
2947
2948 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2949 {
2950 pcm->oss.reg = 0;
2951 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2952 char name[128];
2953 int duplex;
2954 register_oss_dsp(pcm, 0);
2955 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2956 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2957 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2958 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2959 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2960 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2961 pcm->card->number,
2962 name);
2963 #endif
2964 pcm->oss.reg++;
2965 pcm->oss.reg_mask |= 1;
2966 }
2967 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2968 register_oss_dsp(pcm, 1);
2969 pcm->oss.reg++;
2970 pcm->oss.reg_mask |= 2;
2971 }
2972
2973 if (pcm->oss.reg)
2974 snd_pcm_oss_proc_init(pcm);
2975
2976 return 0;
2977 }
2978
2979 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2980 {
2981 if (pcm->oss.reg) {
2982 if (pcm->oss.reg_mask & 1) {
2983 pcm->oss.reg_mask &= ~1;
2984 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2985 pcm->card, 0);
2986 }
2987 if (pcm->oss.reg_mask & 2) {
2988 pcm->oss.reg_mask &= ~2;
2989 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2990 pcm->card, 1);
2991 }
2992 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2993 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2994 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2995 #endif
2996 }
2997 pcm->oss.reg = 0;
2998 }
2999 return 0;
3000 }
3001
3002 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3003 {
3004 snd_pcm_oss_disconnect_minor(pcm);
3005 snd_pcm_oss_proc_done(pcm);
3006 return 0;
3007 }
3008
3009 static struct snd_pcm_notify snd_pcm_oss_notify =
3010 {
3011 .n_register = snd_pcm_oss_register_minor,
3012 .n_disconnect = snd_pcm_oss_disconnect_minor,
3013 .n_unregister = snd_pcm_oss_unregister_minor,
3014 };
3015
3016 static int __init alsa_pcm_oss_init(void)
3017 {
3018 int i;
3019 int err;
3020
3021 /* check device map table */
3022 for (i = 0; i < SNDRV_CARDS; i++) {
3023 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3024 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3025 i, dsp_map[i]);
3026 dsp_map[i] = 0;
3027 }
3028 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3029 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3030 i, adsp_map[i]);
3031 adsp_map[i] = 1;
3032 }
3033 }
3034 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3035 return err;
3036 return 0;
3037 }
3038
3039 static void __exit alsa_pcm_oss_exit(void)
3040 {
3041 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3042 }
3043
3044 module_init(alsa_pcm_oss_init)
3045 module_exit(alsa_pcm_oss_exit)
Linux kernel - Deliverables
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