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ALSA: Add missing description of lx6464es to ALSA-Configuration.txt
[mirror_ubuntu-artful-kernel.git] / sound / core / oss / pcm_oss.c
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/moduleparam.h>
34 #include <linux/string.h>
35 #include <sound/core.h>
36 #include <sound/minors.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include "pcm_plugin.h"
40 #include <sound/info.h>
41 #include <linux/soundcard.h>
42 #include <sound/initval.h>
43
44 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
45
46 static int dsp_map[SNDRV_CARDS];
47 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
48 static int nonblock_open = 1;
49
50 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
51 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
52 MODULE_LICENSE("GPL");
53 module_param_array(dsp_map, int, NULL, 0444);
54 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
55 module_param_array(adsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
57 module_param(nonblock_open, bool, 0644);
58 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
59 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
61
62 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
63 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
64 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
66
67 static inline mm_segment_t snd_enter_user(void)
68 {
69 mm_segment_t fs = get_fs();
70 set_fs(get_ds());
71 return fs;
72 }
73
74 static inline void snd_leave_user(mm_segment_t fs)
75 {
76 set_fs(fs);
77 }
78
79 /*
80 * helper functions to process hw_params
81 */
82 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
83 {
84 int changed = 0;
85 if (i->min < min) {
86 i->min = min;
87 i->openmin = openmin;
88 changed = 1;
89 } else if (i->min == min && !i->openmin && openmin) {
90 i->openmin = 1;
91 changed = 1;
92 }
93 if (i->integer) {
94 if (i->openmin) {
95 i->min++;
96 i->openmin = 0;
97 }
98 }
99 if (snd_interval_checkempty(i)) {
100 snd_interval_none(i);
101 return -EINVAL;
102 }
103 return changed;
104 }
105
106 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
107 {
108 int changed = 0;
109 if (i->max > max) {
110 i->max = max;
111 i->openmax = openmax;
112 changed = 1;
113 } else if (i->max == max && !i->openmax && openmax) {
114 i->openmax = 1;
115 changed = 1;
116 }
117 if (i->integer) {
118 if (i->openmax) {
119 i->max--;
120 i->openmax = 0;
121 }
122 }
123 if (snd_interval_checkempty(i)) {
124 snd_interval_none(i);
125 return -EINVAL;
126 }
127 return changed;
128 }
129
130 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
131 {
132 struct snd_interval t;
133 t.empty = 0;
134 t.min = t.max = val;
135 t.openmin = t.openmax = 0;
136 t.integer = 1;
137 return snd_interval_refine(i, &t);
138 }
139
140 /**
141 * snd_pcm_hw_param_value_min
142 * @params: the hw_params instance
143 * @var: parameter to retrieve
144 * @dir: pointer to the direction (-1,0,1) or NULL
145 *
146 * Return the minimum value for field PAR.
147 */
148 static unsigned int
149 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
150 snd_pcm_hw_param_t var, int *dir)
151 {
152 if (hw_is_mask(var)) {
153 if (dir)
154 *dir = 0;
155 return snd_mask_min(hw_param_mask_c(params, var));
156 }
157 if (hw_is_interval(var)) {
158 const struct snd_interval *i = hw_param_interval_c(params, var);
159 if (dir)
160 *dir = i->openmin;
161 return snd_interval_min(i);
162 }
163 return -EINVAL;
164 }
165
166 /**
167 * snd_pcm_hw_param_value_max
168 * @params: the hw_params instance
169 * @var: parameter to retrieve
170 * @dir: pointer to the direction (-1,0,1) or NULL
171 *
172 * Return the maximum value for field PAR.
173 */
174 static unsigned int
175 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
176 snd_pcm_hw_param_t var, int *dir)
177 {
178 if (hw_is_mask(var)) {
179 if (dir)
180 *dir = 0;
181 return snd_mask_max(hw_param_mask_c(params, var));
182 }
183 if (hw_is_interval(var)) {
184 const struct snd_interval *i = hw_param_interval_c(params, var);
185 if (dir)
186 *dir = - (int) i->openmax;
187 return snd_interval_max(i);
188 }
189 return -EINVAL;
190 }
191
192 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
193 snd_pcm_hw_param_t var,
194 const struct snd_mask *val)
195 {
196 int changed;
197 changed = snd_mask_refine(hw_param_mask(params, var), val);
198 if (changed) {
199 params->cmask |= 1 << var;
200 params->rmask |= 1 << var;
201 }
202 return changed;
203 }
204
205 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
206 struct snd_pcm_hw_params *params,
207 snd_pcm_hw_param_t var,
208 const struct snd_mask *val)
209 {
210 int changed = _snd_pcm_hw_param_mask(params, var, val);
211 if (changed < 0)
212 return changed;
213 if (params->rmask) {
214 int err = snd_pcm_hw_refine(pcm, params);
215 if (err < 0)
216 return err;
217 }
218 return 0;
219 }
220
221 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
222 snd_pcm_hw_param_t var, unsigned int val,
223 int dir)
224 {
225 int changed;
226 int open = 0;
227 if (dir) {
228 if (dir > 0) {
229 open = 1;
230 } else if (dir < 0) {
231 if (val > 0) {
232 open = 1;
233 val--;
234 }
235 }
236 }
237 if (hw_is_mask(var))
238 changed = snd_mask_refine_min(hw_param_mask(params, var),
239 val + !!open);
240 else if (hw_is_interval(var))
241 changed = snd_interval_refine_min(hw_param_interval(params, var),
242 val, open);
243 else
244 return -EINVAL;
245 if (changed) {
246 params->cmask |= 1 << var;
247 params->rmask |= 1 << var;
248 }
249 return changed;
250 }
251
252 /**
253 * snd_pcm_hw_param_min
254 * @pcm: PCM instance
255 * @params: the hw_params instance
256 * @var: parameter to retrieve
257 * @val: minimal value
258 * @dir: pointer to the direction (-1,0,1) or NULL
259 *
260 * Inside configuration space defined by PARAMS remove from PAR all
261 * values < VAL. Reduce configuration space accordingly.
262 * Return new minimum or -EINVAL if the configuration space is empty
263 */
264 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
265 struct snd_pcm_hw_params *params,
266 snd_pcm_hw_param_t var, unsigned int val,
267 int *dir)
268 {
269 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
270 if (changed < 0)
271 return changed;
272 if (params->rmask) {
273 int err = snd_pcm_hw_refine(pcm, params);
274 if (err < 0)
275 return err;
276 }
277 return snd_pcm_hw_param_value_min(params, var, dir);
278 }
279
280 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
281 snd_pcm_hw_param_t var, unsigned int val,
282 int dir)
283 {
284 int changed;
285 int open = 0;
286 if (dir) {
287 if (dir < 0) {
288 open = 1;
289 } else if (dir > 0) {
290 open = 1;
291 val++;
292 }
293 }
294 if (hw_is_mask(var)) {
295 if (val == 0 && open) {
296 snd_mask_none(hw_param_mask(params, var));
297 changed = -EINVAL;
298 } else
299 changed = snd_mask_refine_max(hw_param_mask(params, var),
300 val - !!open);
301 } else if (hw_is_interval(var))
302 changed = snd_interval_refine_max(hw_param_interval(params, var),
303 val, open);
304 else
305 return -EINVAL;
306 if (changed) {
307 params->cmask |= 1 << var;
308 params->rmask |= 1 << var;
309 }
310 return changed;
311 }
312
313 /**
314 * snd_pcm_hw_param_max
315 * @pcm: PCM instance
316 * @params: the hw_params instance
317 * @var: parameter to retrieve
318 * @val: maximal value
319 * @dir: pointer to the direction (-1,0,1) or NULL
320 *
321 * Inside configuration space defined by PARAMS remove from PAR all
322 * values >= VAL + 1. Reduce configuration space accordingly.
323 * Return new maximum or -EINVAL if the configuration space is empty
324 */
325 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
326 struct snd_pcm_hw_params *params,
327 snd_pcm_hw_param_t var, unsigned int val,
328 int *dir)
329 {
330 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
331 if (changed < 0)
332 return changed;
333 if (params->rmask) {
334 int err = snd_pcm_hw_refine(pcm, params);
335 if (err < 0)
336 return err;
337 }
338 return snd_pcm_hw_param_value_max(params, var, dir);
339 }
340
341 static int boundary_sub(int a, int adir,
342 int b, int bdir,
343 int *c, int *cdir)
344 {
345 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
346 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
347 *c = a - b;
348 *cdir = adir - bdir;
349 if (*cdir == -2) {
350 (*c)--;
351 } else if (*cdir == 2) {
352 (*c)++;
353 }
354 return 0;
355 }
356
357 static int boundary_lt(unsigned int a, int adir,
358 unsigned int b, int bdir)
359 {
360 if (adir < 0) {
361 a--;
362 adir = 1;
363 } else if (adir > 0)
364 adir = 1;
365 if (bdir < 0) {
366 b--;
367 bdir = 1;
368 } else if (bdir > 0)
369 bdir = 1;
370 return a < b || (a == b && adir < bdir);
371 }
372
373 /* Return 1 if min is nearer to best than max */
374 static int boundary_nearer(int min, int mindir,
375 int best, int bestdir,
376 int max, int maxdir)
377 {
378 int dmin, dmindir;
379 int dmax, dmaxdir;
380 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
381 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
382 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
383 }
384
385 /**
386 * snd_pcm_hw_param_near
387 * @pcm: PCM instance
388 * @params: the hw_params instance
389 * @var: parameter to retrieve
390 * @best: value to set
391 * @dir: pointer to the direction (-1,0,1) or NULL
392 *
393 * Inside configuration space defined by PARAMS set PAR to the available value
394 * nearest to VAL. Reduce configuration space accordingly.
395 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
396 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
397 * Return the value found.
398 */
399 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
400 struct snd_pcm_hw_params *params,
401 snd_pcm_hw_param_t var, unsigned int best,
402 int *dir)
403 {
404 struct snd_pcm_hw_params *save = NULL;
405 int v;
406 unsigned int saved_min;
407 int last = 0;
408 int min, max;
409 int mindir, maxdir;
410 int valdir = dir ? *dir : 0;
411 /* FIXME */
412 if (best > INT_MAX)
413 best = INT_MAX;
414 min = max = best;
415 mindir = maxdir = valdir;
416 if (maxdir > 0)
417 maxdir = 0;
418 else if (maxdir == 0)
419 maxdir = -1;
420 else {
421 maxdir = 1;
422 max--;
423 }
424 save = kmalloc(sizeof(*save), GFP_KERNEL);
425 if (save == NULL)
426 return -ENOMEM;
427 *save = *params;
428 saved_min = min;
429 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
430 if (min >= 0) {
431 struct snd_pcm_hw_params *params1;
432 if (max < 0)
433 goto _end;
434 if ((unsigned int)min == saved_min && mindir == valdir)
435 goto _end;
436 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
437 if (params1 == NULL) {
438 kfree(save);
439 return -ENOMEM;
440 }
441 *params1 = *save;
442 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
443 if (max < 0) {
444 kfree(params1);
445 goto _end;
446 }
447 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
448 *params = *params1;
449 last = 1;
450 }
451 kfree(params1);
452 } else {
453 *params = *save;
454 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
455 if (max < 0)
456 return max;
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_BUG_ON(v < 0);
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 if (oss_period_size < 16)
783 return -EINVAL;
784 runtime->oss.period_bytes = oss_period_size;
785 runtime->oss.period_frames = 1;
786 runtime->oss.periods = oss_periods;
787 return 0;
788 }
789
790 static int choose_rate(struct snd_pcm_substream *substream,
791 struct snd_pcm_hw_params *params, unsigned int best_rate)
792 {
793 struct snd_interval *it;
794 struct snd_pcm_hw_params *save;
795 unsigned int rate, prev;
796
797 save = kmalloc(sizeof(*save), GFP_KERNEL);
798 if (save == NULL)
799 return -ENOMEM;
800 *save = *params;
801 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
802
803 /* try multiples of the best rate */
804 rate = best_rate;
805 for (;;) {
806 if (it->max < rate || (it->max == rate && it->openmax))
807 break;
808 if (it->min < rate || (it->min == rate && !it->openmin)) {
809 int ret;
810 ret = snd_pcm_hw_param_set(substream, params,
811 SNDRV_PCM_HW_PARAM_RATE,
812 rate, 0);
813 if (ret == (int)rate) {
814 kfree(save);
815 return rate;
816 }
817 *params = *save;
818 }
819 prev = rate;
820 rate += best_rate;
821 if (rate <= prev)
822 break;
823 }
824
825 /* not found, use the nearest rate */
826 kfree(save);
827 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
828 }
829
830 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
831 {
832 struct snd_pcm_runtime *runtime = substream->runtime;
833 struct snd_pcm_hw_params *params, *sparams;
834 struct snd_pcm_sw_params *sw_params;
835 ssize_t oss_buffer_size, oss_period_size;
836 size_t oss_frame_size;
837 int err;
838 int direct;
839 int format, sformat, n;
840 struct snd_mask sformat_mask;
841 struct snd_mask mask;
842
843 if (mutex_lock_interruptible(&runtime->oss.params_lock))
844 return -EINTR;
845 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
846 params = kmalloc(sizeof(*params), GFP_KERNEL);
847 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
848 if (!sw_params || !params || !sparams) {
849 snd_printd("No memory\n");
850 err = -ENOMEM;
851 goto failure;
852 }
853
854 if (atomic_read(&substream->mmap_count))
855 direct = 1;
856 else
857 direct = substream->oss.setup.direct;
858
859 _snd_pcm_hw_params_any(sparams);
860 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
861 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
862 snd_mask_none(&mask);
863 if (atomic_read(&substream->mmap_count))
864 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
865 else {
866 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
867 if (!direct)
868 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
869 }
870 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
871 if (err < 0) {
872 snd_printd("No usable accesses\n");
873 err = -EINVAL;
874 goto failure;
875 }
876 choose_rate(substream, sparams, runtime->oss.rate);
877 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
878
879 format = snd_pcm_oss_format_from(runtime->oss.format);
880
881 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
882 if (direct)
883 sformat = format;
884 else
885 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
886
887 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
888 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
889 if (snd_mask_test(&sformat_mask, sformat) &&
890 snd_pcm_oss_format_to(sformat) >= 0)
891 break;
892 }
893 if (sformat > SNDRV_PCM_FORMAT_LAST) {
894 snd_printd("Cannot find a format!!!\n");
895 err = -EINVAL;
896 goto failure;
897 }
898 }
899 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
900 if (err < 0)
901 goto failure;
902
903 if (direct) {
904 memcpy(params, sparams, sizeof(*params));
905 } else {
906 _snd_pcm_hw_params_any(params);
907 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
908 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
910 snd_pcm_oss_format_from(runtime->oss.format), 0);
911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
912 runtime->oss.channels, 0);
913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
914 runtime->oss.rate, 0);
915 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
916 params_access(params), params_format(params),
917 params_channels(params), params_rate(params));
918 }
919 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
920 params_access(sparams), params_format(sparams),
921 params_channels(sparams), params_rate(sparams));
922
923 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
924 params_channels(params) / 8;
925
926 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
927 snd_pcm_oss_plugin_clear(substream);
928 if (!direct) {
929 /* add necessary plugins */
930 snd_pcm_oss_plugin_clear(substream);
931 if ((err = snd_pcm_plug_format_plugins(substream,
932 params,
933 sparams)) < 0) {
934 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
935 snd_pcm_oss_plugin_clear(substream);
936 goto failure;
937 }
938 if (runtime->oss.plugin_first) {
939 struct snd_pcm_plugin *plugin;
940 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
941 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
942 snd_pcm_oss_plugin_clear(substream);
943 goto failure;
944 }
945 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
946 err = snd_pcm_plugin_append(plugin);
947 } else {
948 err = snd_pcm_plugin_insert(plugin);
949 }
950 if (err < 0) {
951 snd_pcm_oss_plugin_clear(substream);
952 goto failure;
953 }
954 }
955 }
956 #endif
957
958 err = snd_pcm_oss_period_size(substream, params, sparams);
959 if (err < 0)
960 goto failure;
961
962 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
963 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
964 if (err < 0)
965 goto failure;
966
967 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
968 runtime->oss.periods, NULL);
969 if (err < 0)
970 goto failure;
971
972 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
973
974 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
975 snd_printd("HW_PARAMS failed: %i\n", err);
976 goto failure;
977 }
978
979 memset(sw_params, 0, sizeof(*sw_params));
980 if (runtime->oss.trigger) {
981 sw_params->start_threshold = 1;
982 } else {
983 sw_params->start_threshold = runtime->boundary;
984 }
985 if (atomic_read(&substream->mmap_count) ||
986 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
987 sw_params->stop_threshold = runtime->boundary;
988 else
989 sw_params->stop_threshold = runtime->buffer_size;
990 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
991 sw_params->period_step = 1;
992 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
993 1 : runtime->period_size;
994 if (atomic_read(&substream->mmap_count) ||
995 substream->oss.setup.nosilence) {
996 sw_params->silence_threshold = 0;
997 sw_params->silence_size = 0;
998 } else {
999 snd_pcm_uframes_t frames;
1000 frames = runtime->period_size + 16;
1001 if (frames > runtime->buffer_size)
1002 frames = runtime->buffer_size;
1003 sw_params->silence_threshold = frames;
1004 sw_params->silence_size = frames;
1005 }
1006
1007 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1008 snd_printd("SW_PARAMS failed: %i\n", err);
1009 goto failure;
1010 }
1011
1012 runtime->oss.periods = params_periods(sparams);
1013 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1014 if (oss_period_size < 0) {
1015 err = -EINVAL;
1016 goto failure;
1017 }
1018 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1019 if (runtime->oss.plugin_first) {
1020 err = snd_pcm_plug_alloc(substream, oss_period_size);
1021 if (err < 0)
1022 goto failure;
1023 }
1024 #endif
1025 oss_period_size *= oss_frame_size;
1026
1027 oss_buffer_size = oss_period_size * runtime->oss.periods;
1028 if (oss_buffer_size < 0) {
1029 err = -EINVAL;
1030 goto failure;
1031 }
1032
1033 runtime->oss.period_bytes = oss_period_size;
1034 runtime->oss.buffer_bytes = oss_buffer_size;
1035
1036 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1037 runtime->oss.period_bytes,
1038 runtime->oss.buffer_bytes);
1039 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1040 params_period_size(sparams),
1041 params_buffer_size(sparams));
1042
1043 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1044 runtime->oss.channels = params_channels(params);
1045 runtime->oss.rate = params_rate(params);
1046
1047 runtime->oss.params = 0;
1048 runtime->oss.prepare = 1;
1049 vfree(runtime->oss.buffer);
1050 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1051 runtime->oss.buffer_used = 0;
1052 if (runtime->dma_area)
1053 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1054
1055 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1056
1057 err = 0;
1058 failure:
1059 kfree(sw_params);
1060 kfree(params);
1061 kfree(sparams);
1062 mutex_unlock(&runtime->oss.params_lock);
1063 return err;
1064 }
1065
1066 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1067 {
1068 int idx, err;
1069 struct snd_pcm_substream *asubstream = NULL, *substream;
1070
1071 for (idx = 0; idx < 2; idx++) {
1072 substream = pcm_oss_file->streams[idx];
1073 if (substream == NULL)
1074 continue;
1075 if (asubstream == NULL)
1076 asubstream = substream;
1077 if (substream->runtime->oss.params) {
1078 err = snd_pcm_oss_change_params(substream);
1079 if (err < 0)
1080 return err;
1081 }
1082 }
1083 if (!asubstream)
1084 return -EIO;
1085 if (r_substream)
1086 *r_substream = asubstream;
1087 return 0;
1088 }
1089
1090 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1091 {
1092 int err;
1093 struct snd_pcm_runtime *runtime = substream->runtime;
1094
1095 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1096 if (err < 0) {
1097 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1098 return err;
1099 }
1100 runtime->oss.prepare = 0;
1101 runtime->oss.prev_hw_ptr_interrupt = 0;
1102 runtime->oss.period_ptr = 0;
1103 runtime->oss.buffer_used = 0;
1104
1105 return 0;
1106 }
1107
1108 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1109 {
1110 struct snd_pcm_runtime *runtime;
1111 int err;
1112
1113 if (substream == NULL)
1114 return 0;
1115 runtime = substream->runtime;
1116 if (runtime->oss.params) {
1117 err = snd_pcm_oss_change_params(substream);
1118 if (err < 0)
1119 return err;
1120 }
1121 if (runtime->oss.prepare) {
1122 err = snd_pcm_oss_prepare(substream);
1123 if (err < 0)
1124 return err;
1125 }
1126 return 0;
1127 }
1128
1129 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1130 {
1131 struct snd_pcm_runtime *runtime;
1132 snd_pcm_uframes_t frames;
1133 int err = 0;
1134
1135 while (1) {
1136 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1137 if (err < 0)
1138 break;
1139 runtime = substream->runtime;
1140 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1141 break;
1142 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1143 /* until avail(delay) <= buffer_size */
1144 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1145 frames /= runtime->period_size;
1146 frames *= runtime->period_size;
1147 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1148 if (err < 0)
1149 break;
1150 }
1151 return err;
1152 }
1153
1154 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1155 {
1156 struct snd_pcm_runtime *runtime = substream->runtime;
1157 int ret;
1158 while (1) {
1159 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1160 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1161 #ifdef OSS_DEBUG
1162 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1163 printk(KERN_DEBUG "pcm_oss: write: "
1164 "recovering from XRUN\n");
1165 else
1166 printk(KERN_DEBUG "pcm_oss: write: "
1167 "recovering from SUSPEND\n");
1168 #endif
1169 ret = snd_pcm_oss_prepare(substream);
1170 if (ret < 0)
1171 break;
1172 }
1173 if (in_kernel) {
1174 mm_segment_t fs;
1175 fs = snd_enter_user();
1176 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1177 snd_leave_user(fs);
1178 } else {
1179 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1180 }
1181 if (ret != -EPIPE && ret != -ESTRPIPE)
1182 break;
1183 /* test, if we can't store new data, because the stream */
1184 /* has not been started */
1185 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1186 return -EAGAIN;
1187 }
1188 return ret;
1189 }
1190
1191 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1192 {
1193 struct snd_pcm_runtime *runtime = substream->runtime;
1194 snd_pcm_sframes_t delay;
1195 int ret;
1196 while (1) {
1197 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1198 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1199 #ifdef OSS_DEBUG
1200 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1201 printk(KERN_DEBUG "pcm_oss: read: "
1202 "recovering from XRUN\n");
1203 else
1204 printk(KERN_DEBUG "pcm_oss: read: "
1205 "recovering from SUSPEND\n");
1206 #endif
1207 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1208 if (ret < 0)
1209 break;
1210 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1211 ret = snd_pcm_oss_prepare(substream);
1212 if (ret < 0)
1213 break;
1214 }
1215 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1216 if (ret < 0)
1217 break;
1218 if (in_kernel) {
1219 mm_segment_t fs;
1220 fs = snd_enter_user();
1221 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1222 snd_leave_user(fs);
1223 } else {
1224 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1225 }
1226 if (ret == -EPIPE) {
1227 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1228 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1229 if (ret < 0)
1230 break;
1231 }
1232 continue;
1233 }
1234 if (ret != -ESTRPIPE)
1235 break;
1236 }
1237 return ret;
1238 }
1239
1240 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1241 {
1242 struct snd_pcm_runtime *runtime = substream->runtime;
1243 int ret;
1244 while (1) {
1245 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1246 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1247 #ifdef OSS_DEBUG
1248 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1249 printk(KERN_DEBUG "pcm_oss: writev: "
1250 "recovering from XRUN\n");
1251 else
1252 printk(KERN_DEBUG "pcm_oss: writev: "
1253 "recovering from SUSPEND\n");
1254 #endif
1255 ret = snd_pcm_oss_prepare(substream);
1256 if (ret < 0)
1257 break;
1258 }
1259 if (in_kernel) {
1260 mm_segment_t fs;
1261 fs = snd_enter_user();
1262 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1263 snd_leave_user(fs);
1264 } else {
1265 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1266 }
1267 if (ret != -EPIPE && ret != -ESTRPIPE)
1268 break;
1269
1270 /* test, if we can't store new data, because the stream */
1271 /* has not been started */
1272 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1273 return -EAGAIN;
1274 }
1275 return ret;
1276 }
1277
1278 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1279 {
1280 struct snd_pcm_runtime *runtime = substream->runtime;
1281 int ret;
1282 while (1) {
1283 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1284 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1285 #ifdef OSS_DEBUG
1286 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1287 printk(KERN_DEBUG "pcm_oss: readv: "
1288 "recovering from XRUN\n");
1289 else
1290 printk(KERN_DEBUG "pcm_oss: readv: "
1291 "recovering from SUSPEND\n");
1292 #endif
1293 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1294 if (ret < 0)
1295 break;
1296 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1297 ret = snd_pcm_oss_prepare(substream);
1298 if (ret < 0)
1299 break;
1300 }
1301 if (in_kernel) {
1302 mm_segment_t fs;
1303 fs = snd_enter_user();
1304 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1305 snd_leave_user(fs);
1306 } else {
1307 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1308 }
1309 if (ret != -EPIPE && ret != -ESTRPIPE)
1310 break;
1311 }
1312 return ret;
1313 }
1314
1315 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1316 {
1317 struct snd_pcm_runtime *runtime = substream->runtime;
1318 snd_pcm_sframes_t frames, frames1;
1319 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1320 if (runtime->oss.plugin_first) {
1321 struct snd_pcm_plugin_channel *channels;
1322 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1323 if (!in_kernel) {
1324 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1325 return -EFAULT;
1326 buf = runtime->oss.buffer;
1327 }
1328 frames = bytes / oss_frame_bytes;
1329 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1330 if (frames1 < 0)
1331 return frames1;
1332 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1333 if (frames1 <= 0)
1334 return frames1;
1335 bytes = frames1 * oss_frame_bytes;
1336 } else
1337 #endif
1338 {
1339 frames = bytes_to_frames(runtime, bytes);
1340 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1341 if (frames1 <= 0)
1342 return frames1;
1343 bytes = frames_to_bytes(runtime, frames1);
1344 }
1345 return bytes;
1346 }
1347
1348 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1349 {
1350 size_t xfer = 0;
1351 ssize_t tmp;
1352 struct snd_pcm_runtime *runtime = substream->runtime;
1353
1354 if (atomic_read(&substream->mmap_count))
1355 return -ENXIO;
1356
1357 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1358 return tmp;
1359 mutex_lock(&runtime->oss.params_lock);
1360 while (bytes > 0) {
1361 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1362 tmp = bytes;
1363 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1364 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1365 if (tmp > 0) {
1366 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1367 tmp = -EFAULT;
1368 goto err;
1369 }
1370 }
1371 runtime->oss.buffer_used += tmp;
1372 buf += tmp;
1373 bytes -= tmp;
1374 xfer += tmp;
1375 if (substream->oss.setup.partialfrag ||
1376 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1377 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1378 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1379 if (tmp <= 0)
1380 goto err;
1381 runtime->oss.bytes += tmp;
1382 runtime->oss.period_ptr += tmp;
1383 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1384 if (runtime->oss.period_ptr == 0 ||
1385 runtime->oss.period_ptr == runtime->oss.buffer_used)
1386 runtime->oss.buffer_used = 0;
1387 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1388 tmp = -EAGAIN;
1389 goto err;
1390 }
1391 }
1392 } else {
1393 tmp = snd_pcm_oss_write2(substream,
1394 (const char __force *)buf,
1395 runtime->oss.period_bytes, 0);
1396 if (tmp <= 0)
1397 goto err;
1398 runtime->oss.bytes += tmp;
1399 buf += tmp;
1400 bytes -= tmp;
1401 xfer += tmp;
1402 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1403 tmp != runtime->oss.period_bytes)
1404 break;
1405 }
1406 }
1407 mutex_unlock(&runtime->oss.params_lock);
1408 return xfer;
1409
1410 err:
1411 mutex_unlock(&runtime->oss.params_lock);
1412 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1413 }
1414
1415 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1416 {
1417 struct snd_pcm_runtime *runtime = substream->runtime;
1418 snd_pcm_sframes_t frames, frames1;
1419 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1420 char __user *final_dst = (char __user *)buf;
1421 if (runtime->oss.plugin_first) {
1422 struct snd_pcm_plugin_channel *channels;
1423 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1424 if (!in_kernel)
1425 buf = runtime->oss.buffer;
1426 frames = bytes / oss_frame_bytes;
1427 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1428 if (frames1 < 0)
1429 return frames1;
1430 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1431 if (frames1 <= 0)
1432 return frames1;
1433 bytes = frames1 * oss_frame_bytes;
1434 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1435 return -EFAULT;
1436 } else
1437 #endif
1438 {
1439 frames = bytes_to_frames(runtime, bytes);
1440 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1441 if (frames1 <= 0)
1442 return frames1;
1443 bytes = frames_to_bytes(runtime, frames1);
1444 }
1445 return bytes;
1446 }
1447
1448 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1449 {
1450 size_t xfer = 0;
1451 ssize_t tmp;
1452 struct snd_pcm_runtime *runtime = substream->runtime;
1453
1454 if (atomic_read(&substream->mmap_count))
1455 return -ENXIO;
1456
1457 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1458 return tmp;
1459 mutex_lock(&runtime->oss.params_lock);
1460 while (bytes > 0) {
1461 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1462 if (runtime->oss.buffer_used == 0) {
1463 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1464 if (tmp <= 0)
1465 goto err;
1466 runtime->oss.bytes += tmp;
1467 runtime->oss.period_ptr = tmp;
1468 runtime->oss.buffer_used = tmp;
1469 }
1470 tmp = bytes;
1471 if ((size_t) tmp > runtime->oss.buffer_used)
1472 tmp = runtime->oss.buffer_used;
1473 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1474 tmp = -EFAULT;
1475 goto err;
1476 }
1477 buf += tmp;
1478 bytes -= tmp;
1479 xfer += tmp;
1480 runtime->oss.buffer_used -= tmp;
1481 } else {
1482 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1483 runtime->oss.period_bytes, 0);
1484 if (tmp <= 0)
1485 goto err;
1486 runtime->oss.bytes += tmp;
1487 buf += tmp;
1488 bytes -= tmp;
1489 xfer += tmp;
1490 }
1491 }
1492 mutex_unlock(&runtime->oss.params_lock);
1493 return xfer;
1494
1495 err:
1496 mutex_unlock(&runtime->oss.params_lock);
1497 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1498 }
1499
1500 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1501 {
1502 struct snd_pcm_substream *substream;
1503
1504 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1505 if (substream != NULL) {
1506 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1507 substream->runtime->oss.prepare = 1;
1508 }
1509 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1510 if (substream != NULL) {
1511 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1512 substream->runtime->oss.prepare = 1;
1513 }
1514 return 0;
1515 }
1516
1517 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1518 {
1519 struct snd_pcm_substream *substream;
1520 int err;
1521
1522 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1523 if (substream != NULL) {
1524 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1525 return err;
1526 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1527 }
1528 /* note: all errors from the start action are ignored */
1529 /* OSS apps do not know, how to handle them */
1530 return 0;
1531 }
1532
1533 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1534 {
1535 struct snd_pcm_runtime *runtime;
1536 ssize_t result = 0;
1537 long res;
1538 wait_queue_t wait;
1539
1540 runtime = substream->runtime;
1541 init_waitqueue_entry(&wait, current);
1542 add_wait_queue(&runtime->sleep, &wait);
1543 #ifdef OSS_DEBUG
1544 printk(KERN_DEBUG "sync1: size = %li\n", size);
1545 #endif
1546 while (1) {
1547 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1548 if (result > 0) {
1549 runtime->oss.buffer_used = 0;
1550 result = 0;
1551 break;
1552 }
1553 if (result != 0 && result != -EAGAIN)
1554 break;
1555 result = 0;
1556 set_current_state(TASK_INTERRUPTIBLE);
1557 snd_pcm_stream_lock_irq(substream);
1558 res = runtime->status->state;
1559 snd_pcm_stream_unlock_irq(substream);
1560 if (res != SNDRV_PCM_STATE_RUNNING) {
1561 set_current_state(TASK_RUNNING);
1562 break;
1563 }
1564 res = schedule_timeout(10 * HZ);
1565 if (signal_pending(current)) {
1566 result = -ERESTARTSYS;
1567 break;
1568 }
1569 if (res == 0) {
1570 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1571 result = -EIO;
1572 break;
1573 }
1574 }
1575 remove_wait_queue(&runtime->sleep, &wait);
1576 return result;
1577 }
1578
1579 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1580 {
1581 int err = 0;
1582 unsigned int saved_f_flags;
1583 struct snd_pcm_substream *substream;
1584 struct snd_pcm_runtime *runtime;
1585 snd_pcm_format_t format;
1586 unsigned long width;
1587 size_t size;
1588
1589 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1590 if (substream != NULL) {
1591 runtime = substream->runtime;
1592 if (atomic_read(&substream->mmap_count))
1593 goto __direct;
1594 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1595 return err;
1596 format = snd_pcm_oss_format_from(runtime->oss.format);
1597 width = snd_pcm_format_physical_width(format);
1598 mutex_lock(&runtime->oss.params_lock);
1599 if (runtime->oss.buffer_used > 0) {
1600 #ifdef OSS_DEBUG
1601 printk(KERN_DEBUG "sync: buffer_used\n");
1602 #endif
1603 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1604 snd_pcm_format_set_silence(format,
1605 runtime->oss.buffer + runtime->oss.buffer_used,
1606 size);
1607 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1608 if (err < 0) {
1609 mutex_unlock(&runtime->oss.params_lock);
1610 return err;
1611 }
1612 } else if (runtime->oss.period_ptr > 0) {
1613 #ifdef OSS_DEBUG
1614 printk(KERN_DEBUG "sync: period_ptr\n");
1615 #endif
1616 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1617 snd_pcm_format_set_silence(format,
1618 runtime->oss.buffer,
1619 size * 8 / width);
1620 err = snd_pcm_oss_sync1(substream, size);
1621 if (err < 0) {
1622 mutex_unlock(&runtime->oss.params_lock);
1623 return err;
1624 }
1625 }
1626 /*
1627 * The ALSA's period might be a bit large than OSS one.
1628 * Fill the remain portion of ALSA period with zeros.
1629 */
1630 size = runtime->control->appl_ptr % runtime->period_size;
1631 if (size > 0) {
1632 size = runtime->period_size - size;
1633 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1634 size = (runtime->frame_bits * size) / 8;
1635 while (size > 0) {
1636 mm_segment_t fs;
1637 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1638 size -= size1;
1639 size1 *= 8;
1640 size1 /= runtime->sample_bits;
1641 snd_pcm_format_set_silence(runtime->format,
1642 runtime->oss.buffer,
1643 size1);
1644 size1 /= runtime->channels; /* frames */
1645 fs = snd_enter_user();
1646 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1647 snd_leave_user(fs);
1648 }
1649 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1650 void __user *buffers[runtime->channels];
1651 memset(buffers, 0, runtime->channels * sizeof(void *));
1652 snd_pcm_lib_writev(substream, buffers, size);
1653 }
1654 }
1655 mutex_unlock(&runtime->oss.params_lock);
1656 /*
1657 * finish sync: drain the buffer
1658 */
1659 __direct:
1660 saved_f_flags = substream->f_flags;
1661 substream->f_flags &= ~O_NONBLOCK;
1662 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1663 substream->f_flags = saved_f_flags;
1664 if (err < 0)
1665 return err;
1666 runtime->oss.prepare = 1;
1667 }
1668
1669 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1670 if (substream != NULL) {
1671 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1672 return err;
1673 runtime = substream->runtime;
1674 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1675 if (err < 0)
1676 return err;
1677 runtime->oss.buffer_used = 0;
1678 runtime->oss.prepare = 1;
1679 }
1680 return 0;
1681 }
1682
1683 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1684 {
1685 int idx;
1686
1687 for (idx = 1; idx >= 0; --idx) {
1688 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1689 struct snd_pcm_runtime *runtime;
1690 if (substream == NULL)
1691 continue;
1692 runtime = substream->runtime;
1693 if (rate < 1000)
1694 rate = 1000;
1695 else if (rate > 192000)
1696 rate = 192000;
1697 if (runtime->oss.rate != rate) {
1698 runtime->oss.params = 1;
1699 runtime->oss.rate = rate;
1700 }
1701 }
1702 return snd_pcm_oss_get_rate(pcm_oss_file);
1703 }
1704
1705 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1706 {
1707 struct snd_pcm_substream *substream;
1708 int err;
1709
1710 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1711 return err;
1712 return substream->runtime->oss.rate;
1713 }
1714
1715 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1716 {
1717 int idx;
1718 if (channels < 1)
1719 channels = 1;
1720 if (channels > 128)
1721 return -EINVAL;
1722 for (idx = 1; idx >= 0; --idx) {
1723 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1724 struct snd_pcm_runtime *runtime;
1725 if (substream == NULL)
1726 continue;
1727 runtime = substream->runtime;
1728 if (runtime->oss.channels != channels) {
1729 runtime->oss.params = 1;
1730 runtime->oss.channels = channels;
1731 }
1732 }
1733 return snd_pcm_oss_get_channels(pcm_oss_file);
1734 }
1735
1736 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1737 {
1738 struct snd_pcm_substream *substream;
1739 int err;
1740
1741 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1742 return err;
1743 return substream->runtime->oss.channels;
1744 }
1745
1746 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1747 {
1748 struct snd_pcm_substream *substream;
1749 int err;
1750
1751 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1752 return err;
1753 return substream->runtime->oss.period_bytes;
1754 }
1755
1756 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1757 {
1758 struct snd_pcm_substream *substream;
1759 int err;
1760 int direct;
1761 struct snd_pcm_hw_params *params;
1762 unsigned int formats = 0;
1763 struct snd_mask format_mask;
1764 int fmt;
1765
1766 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1767 return err;
1768 if (atomic_read(&substream->mmap_count))
1769 direct = 1;
1770 else
1771 direct = substream->oss.setup.direct;
1772 if (!direct)
1773 return AFMT_MU_LAW | AFMT_U8 |
1774 AFMT_S16_LE | AFMT_S16_BE |
1775 AFMT_S8 | AFMT_U16_LE |
1776 AFMT_U16_BE |
1777 AFMT_S32_LE | AFMT_S32_BE |
1778 AFMT_S24_LE | AFMT_S24_BE |
1779 AFMT_S24_PACKED;
1780 params = kmalloc(sizeof(*params), GFP_KERNEL);
1781 if (!params)
1782 return -ENOMEM;
1783 _snd_pcm_hw_params_any(params);
1784 err = snd_pcm_hw_refine(substream, params);
1785 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1786 kfree(params);
1787 if (err < 0)
1788 return err;
1789 for (fmt = 0; fmt < 32; ++fmt) {
1790 if (snd_mask_test(&format_mask, fmt)) {
1791 int f = snd_pcm_oss_format_to(fmt);
1792 if (f >= 0)
1793 formats |= f;
1794 }
1795 }
1796 return formats;
1797 }
1798
1799 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1800 {
1801 int formats, idx;
1802
1803 if (format != AFMT_QUERY) {
1804 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1805 if (formats < 0)
1806 return formats;
1807 if (!(formats & format))
1808 format = AFMT_U8;
1809 for (idx = 1; idx >= 0; --idx) {
1810 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1811 struct snd_pcm_runtime *runtime;
1812 if (substream == NULL)
1813 continue;
1814 runtime = substream->runtime;
1815 if (runtime->oss.format != format) {
1816 runtime->oss.params = 1;
1817 runtime->oss.format = format;
1818 }
1819 }
1820 }
1821 return snd_pcm_oss_get_format(pcm_oss_file);
1822 }
1823
1824 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1825 {
1826 struct snd_pcm_substream *substream;
1827 int err;
1828
1829 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1830 return err;
1831 return substream->runtime->oss.format;
1832 }
1833
1834 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1835 {
1836 struct snd_pcm_runtime *runtime;
1837
1838 if (substream == NULL)
1839 return 0;
1840 runtime = substream->runtime;
1841 if (subdivide == 0) {
1842 subdivide = runtime->oss.subdivision;
1843 if (subdivide == 0)
1844 subdivide = 1;
1845 return subdivide;
1846 }
1847 if (runtime->oss.subdivision || runtime->oss.fragshift)
1848 return -EINVAL;
1849 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1850 subdivide != 8 && subdivide != 16)
1851 return -EINVAL;
1852 runtime->oss.subdivision = subdivide;
1853 runtime->oss.params = 1;
1854 return subdivide;
1855 }
1856
1857 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1858 {
1859 int err = -EINVAL, idx;
1860
1861 for (idx = 1; idx >= 0; --idx) {
1862 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1863 if (substream == NULL)
1864 continue;
1865 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1866 return err;
1867 }
1868 return err;
1869 }
1870
1871 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1872 {
1873 struct snd_pcm_runtime *runtime;
1874
1875 if (substream == NULL)
1876 return 0;
1877 runtime = substream->runtime;
1878 if (runtime->oss.subdivision || runtime->oss.fragshift)
1879 return -EINVAL;
1880 runtime->oss.fragshift = val & 0xffff;
1881 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1882 if (runtime->oss.fragshift < 4) /* < 16 */
1883 runtime->oss.fragshift = 4;
1884 if (runtime->oss.maxfrags < 2)
1885 runtime->oss.maxfrags = 2;
1886 runtime->oss.params = 1;
1887 return 0;
1888 }
1889
1890 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1891 {
1892 int err = -EINVAL, idx;
1893
1894 for (idx = 1; idx >= 0; --idx) {
1895 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1896 if (substream == NULL)
1897 continue;
1898 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1899 return err;
1900 }
1901 return err;
1902 }
1903
1904 static int snd_pcm_oss_nonblock(struct file * file)
1905 {
1906 spin_lock(&file->f_lock);
1907 file->f_flags |= O_NONBLOCK;
1908 spin_unlock(&file->f_lock);
1909 return 0;
1910 }
1911
1912 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1913 {
1914
1915 if (substream == NULL) {
1916 res &= ~DSP_CAP_DUPLEX;
1917 return res;
1918 }
1919 #ifdef DSP_CAP_MULTI
1920 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1921 if (substream->pstr->substream_count > 1)
1922 res |= DSP_CAP_MULTI;
1923 #endif
1924 /* DSP_CAP_REALTIME is set all times: */
1925 /* all ALSA drivers can return actual pointer in ring buffer */
1926 #if defined(DSP_CAP_REALTIME) && 0
1927 {
1928 struct snd_pcm_runtime *runtime = substream->runtime;
1929 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1930 res &= ~DSP_CAP_REALTIME;
1931 }
1932 #endif
1933 return res;
1934 }
1935
1936 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1937 {
1938 int result, idx;
1939
1940 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1941 for (idx = 0; idx < 2; idx++) {
1942 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1943 result = snd_pcm_oss_get_caps1(substream, result);
1944 }
1945 result |= 0x0001; /* revision - same as SB AWE 64 */
1946 return result;
1947 }
1948
1949 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1950 {
1951 struct snd_pcm_runtime *runtime = substream->runtime;
1952 snd_pcm_uframes_t appl_ptr;
1953 appl_ptr = hw_ptr + runtime->buffer_size;
1954 appl_ptr %= runtime->boundary;
1955 runtime->control->appl_ptr = appl_ptr;
1956 }
1957
1958 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1959 {
1960 struct snd_pcm_runtime *runtime;
1961 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1962 int err, cmd;
1963
1964 #ifdef OSS_DEBUG
1965 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1966 #endif
1967
1968 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1969 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1970
1971 if (psubstream) {
1972 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1973 return err;
1974 }
1975 if (csubstream) {
1976 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1977 return err;
1978 }
1979 if (psubstream) {
1980 runtime = psubstream->runtime;
1981 if (trigger & PCM_ENABLE_OUTPUT) {
1982 if (runtime->oss.trigger)
1983 goto _skip1;
1984 if (atomic_read(&psubstream->mmap_count))
1985 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1986 runtime->oss.trigger = 1;
1987 runtime->start_threshold = 1;
1988 cmd = SNDRV_PCM_IOCTL_START;
1989 } else {
1990 if (!runtime->oss.trigger)
1991 goto _skip1;
1992 runtime->oss.trigger = 0;
1993 runtime->start_threshold = runtime->boundary;
1994 cmd = SNDRV_PCM_IOCTL_DROP;
1995 runtime->oss.prepare = 1;
1996 }
1997 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1998 if (err < 0)
1999 return err;
2000 }
2001 _skip1:
2002 if (csubstream) {
2003 runtime = csubstream->runtime;
2004 if (trigger & PCM_ENABLE_INPUT) {
2005 if (runtime->oss.trigger)
2006 goto _skip2;
2007 runtime->oss.trigger = 1;
2008 runtime->start_threshold = 1;
2009 cmd = SNDRV_PCM_IOCTL_START;
2010 } else {
2011 if (!runtime->oss.trigger)
2012 goto _skip2;
2013 runtime->oss.trigger = 0;
2014 runtime->start_threshold = runtime->boundary;
2015 cmd = SNDRV_PCM_IOCTL_DROP;
2016 runtime->oss.prepare = 1;
2017 }
2018 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2019 if (err < 0)
2020 return err;
2021 }
2022 _skip2:
2023 return 0;
2024 }
2025
2026 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2027 {
2028 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2029 int result = 0;
2030
2031 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2032 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2033 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2034 result |= PCM_ENABLE_OUTPUT;
2035 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2036 result |= PCM_ENABLE_INPUT;
2037 return result;
2038 }
2039
2040 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2041 {
2042 struct snd_pcm_substream *substream;
2043 struct snd_pcm_runtime *runtime;
2044 snd_pcm_sframes_t delay;
2045 int err;
2046
2047 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2048 if (substream == NULL)
2049 return -EINVAL;
2050 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2051 return err;
2052 runtime = substream->runtime;
2053 if (runtime->oss.params || runtime->oss.prepare)
2054 return 0;
2055 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2056 if (err == -EPIPE)
2057 delay = 0; /* hack for broken OSS applications */
2058 else if (err < 0)
2059 return err;
2060 return snd_pcm_oss_bytes(substream, delay);
2061 }
2062
2063 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2064 {
2065 struct snd_pcm_substream *substream;
2066 struct snd_pcm_runtime *runtime;
2067 snd_pcm_sframes_t delay;
2068 int fixup;
2069 struct count_info info;
2070 int err;
2071
2072 if (_info == NULL)
2073 return -EFAULT;
2074 substream = pcm_oss_file->streams[stream];
2075 if (substream == NULL)
2076 return -EINVAL;
2077 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2078 return err;
2079 runtime = substream->runtime;
2080 if (runtime->oss.params || runtime->oss.prepare) {
2081 memset(&info, 0, sizeof(info));
2082 if (copy_to_user(_info, &info, sizeof(info)))
2083 return -EFAULT;
2084 return 0;
2085 }
2086 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2087 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2088 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2089 err = 0;
2090 delay = 0;
2091 fixup = 0;
2092 } else {
2093 fixup = runtime->oss.buffer_used;
2094 }
2095 } else {
2096 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2097 fixup = -runtime->oss.buffer_used;
2098 }
2099 if (err < 0)
2100 return err;
2101 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2102 if (atomic_read(&substream->mmap_count)) {
2103 snd_pcm_sframes_t n;
2104 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2105 if (n < 0)
2106 n += runtime->boundary;
2107 info.blocks = n / runtime->period_size;
2108 runtime->oss.prev_hw_ptr_interrupt = delay;
2109 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2110 snd_pcm_oss_simulate_fill(substream, delay);
2111 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2112 } else {
2113 delay = snd_pcm_oss_bytes(substream, delay);
2114 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2115 if (substream->oss.setup.buggyptr)
2116 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2117 else
2118 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2119 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2120 } else {
2121 delay += fixup;
2122 info.blocks = delay / runtime->oss.period_bytes;
2123 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2124 }
2125 }
2126 if (copy_to_user(_info, &info, sizeof(info)))
2127 return -EFAULT;
2128 return 0;
2129 }
2130
2131 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2132 {
2133 struct snd_pcm_substream *substream;
2134 struct snd_pcm_runtime *runtime;
2135 snd_pcm_sframes_t avail;
2136 int fixup;
2137 struct audio_buf_info info;
2138 int err;
2139
2140 if (_info == NULL)
2141 return -EFAULT;
2142 substream = pcm_oss_file->streams[stream];
2143 if (substream == NULL)
2144 return -EINVAL;
2145 runtime = substream->runtime;
2146
2147 if (runtime->oss.params &&
2148 (err = snd_pcm_oss_change_params(substream)) < 0)
2149 return err;
2150
2151 info.fragsize = runtime->oss.period_bytes;
2152 info.fragstotal = runtime->periods;
2153 if (runtime->oss.prepare) {
2154 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2155 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2156 info.fragments = runtime->oss.periods;
2157 } else {
2158 info.bytes = 0;
2159 info.fragments = 0;
2160 }
2161 } else {
2162 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2163 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2164 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2165 avail = runtime->buffer_size;
2166 err = 0;
2167 fixup = 0;
2168 } else {
2169 avail = runtime->buffer_size - avail;
2170 fixup = -runtime->oss.buffer_used;
2171 }
2172 } else {
2173 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2174 fixup = runtime->oss.buffer_used;
2175 }
2176 if (err < 0)
2177 return err;
2178 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2179 info.fragments = info.bytes / runtime->oss.period_bytes;
2180 }
2181
2182 #ifdef OSS_DEBUG
2183 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2184 "fragstotal = %i, fragsize = %i\n",
2185 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2186 #endif
2187 if (copy_to_user(_info, &info, sizeof(info)))
2188 return -EFAULT;
2189 return 0;
2190 }
2191
2192 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2193 {
2194 // it won't be probably implemented
2195 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2196 return -EINVAL;
2197 }
2198
2199 static const char *strip_task_path(const char *path)
2200 {
2201 const char *ptr, *ptrl = NULL;
2202 for (ptr = path; *ptr; ptr++) {
2203 if (*ptr == '/')
2204 ptrl = ptr + 1;
2205 }
2206 return ptrl;
2207 }
2208
2209 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2210 const char *task_name,
2211 struct snd_pcm_oss_setup *rsetup)
2212 {
2213 struct snd_pcm_oss_setup *setup;
2214
2215 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2216 do {
2217 for (setup = pcm->streams[stream].oss.setup_list; setup;
2218 setup = setup->next) {
2219 if (!strcmp(setup->task_name, task_name))
2220 goto out;
2221 }
2222 } while ((task_name = strip_task_path(task_name)) != NULL);
2223 out:
2224 if (setup)
2225 *rsetup = *setup;
2226 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2227 }
2228
2229 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2230 {
2231 struct snd_pcm_runtime *runtime;
2232 runtime = substream->runtime;
2233 vfree(runtime->oss.buffer);
2234 runtime->oss.buffer = NULL;
2235 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2236 snd_pcm_oss_plugin_clear(substream);
2237 #endif
2238 substream->oss.oss = 0;
2239 }
2240
2241 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2242 struct snd_pcm_oss_setup *setup,
2243 int minor)
2244 {
2245 struct snd_pcm_runtime *runtime;
2246
2247 substream->oss.oss = 1;
2248 substream->oss.setup = *setup;
2249 if (setup->nonblock)
2250 substream->f_flags |= O_NONBLOCK;
2251 else if (setup->block)
2252 substream->f_flags &= ~O_NONBLOCK;
2253 runtime = substream->runtime;
2254 runtime->oss.params = 1;
2255 runtime->oss.trigger = 1;
2256 runtime->oss.rate = 8000;
2257 mutex_init(&runtime->oss.params_lock);
2258 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2259 case SNDRV_MINOR_OSS_PCM_8:
2260 runtime->oss.format = AFMT_U8;
2261 break;
2262 case SNDRV_MINOR_OSS_PCM_16:
2263 runtime->oss.format = AFMT_S16_LE;
2264 break;
2265 default:
2266 runtime->oss.format = AFMT_MU_LAW;
2267 }
2268 runtime->oss.channels = 1;
2269 runtime->oss.fragshift = 0;
2270 runtime->oss.maxfrags = 0;
2271 runtime->oss.subdivision = 0;
2272 substream->pcm_release = snd_pcm_oss_release_substream;
2273 }
2274
2275 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2276 {
2277 int cidx;
2278 if (!pcm_oss_file)
2279 return 0;
2280 for (cidx = 0; cidx < 2; ++cidx) {
2281 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2282 if (substream)
2283 snd_pcm_release_substream(substream);
2284 }
2285 kfree(pcm_oss_file);
2286 return 0;
2287 }
2288
2289 static int snd_pcm_oss_open_file(struct file *file,
2290 struct snd_pcm *pcm,
2291 struct snd_pcm_oss_file **rpcm_oss_file,
2292 int minor,
2293 struct snd_pcm_oss_setup *setup)
2294 {
2295 int idx, err;
2296 struct snd_pcm_oss_file *pcm_oss_file;
2297 struct snd_pcm_substream *substream;
2298 fmode_t f_mode = file->f_mode;
2299
2300 if (rpcm_oss_file)
2301 *rpcm_oss_file = NULL;
2302
2303 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2304 if (pcm_oss_file == NULL)
2305 return -ENOMEM;
2306
2307 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2308 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2309 f_mode = FMODE_WRITE;
2310
2311 file->f_flags &= ~O_APPEND;
2312 for (idx = 0; idx < 2; idx++) {
2313 if (setup[idx].disable)
2314 continue;
2315 if (! pcm->streams[idx].substream_count)
2316 continue; /* no matching substream */
2317 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2318 if (! (f_mode & FMODE_WRITE))
2319 continue;
2320 } else {
2321 if (! (f_mode & FMODE_READ))
2322 continue;
2323 }
2324 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2325 if (err < 0) {
2326 snd_pcm_oss_release_file(pcm_oss_file);
2327 return err;
2328 }
2329
2330 pcm_oss_file->streams[idx] = substream;
2331 substream->file = pcm_oss_file;
2332 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2333 }
2334
2335 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2336 snd_pcm_oss_release_file(pcm_oss_file);
2337 return -EINVAL;
2338 }
2339
2340 file->private_data = pcm_oss_file;
2341 if (rpcm_oss_file)
2342 *rpcm_oss_file = pcm_oss_file;
2343 return 0;
2344 }
2345
2346
2347 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2348 {
2349 unsigned int idx;
2350
2351 if (snd_BUG_ON(!task || !name || size < 2))
2352 return -EINVAL;
2353 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2354 name[idx] = task->comm[idx];
2355 name[idx] = '\0';
2356 return 0;
2357 }
2358
2359 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2360 {
2361 int err;
2362 char task_name[32];
2363 struct snd_pcm *pcm;
2364 struct snd_pcm_oss_file *pcm_oss_file;
2365 struct snd_pcm_oss_setup setup[2];
2366 int nonblock;
2367 wait_queue_t wait;
2368
2369 pcm = snd_lookup_oss_minor_data(iminor(inode),
2370 SNDRV_OSS_DEVICE_TYPE_PCM);
2371 if (pcm == NULL) {
2372 err = -ENODEV;
2373 goto __error1;
2374 }
2375 err = snd_card_file_add(pcm->card, file);
2376 if (err < 0)
2377 goto __error1;
2378 if (!try_module_get(pcm->card->module)) {
2379 err = -EFAULT;
2380 goto __error2;
2381 }
2382 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2383 err = -EFAULT;
2384 goto __error;
2385 }
2386 memset(setup, 0, sizeof(setup));
2387 if (file->f_mode & FMODE_WRITE)
2388 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2389 task_name, &setup[0]);
2390 if (file->f_mode & FMODE_READ)
2391 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2392 task_name, &setup[1]);
2393
2394 nonblock = !!(file->f_flags & O_NONBLOCK);
2395 if (!nonblock)
2396 nonblock = nonblock_open;
2397
2398 init_waitqueue_entry(&wait, current);
2399 add_wait_queue(&pcm->open_wait, &wait);
2400 mutex_lock(&pcm->open_mutex);
2401 while (1) {
2402 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2403 iminor(inode), setup);
2404 if (err >= 0)
2405 break;
2406 if (err == -EAGAIN) {
2407 if (nonblock) {
2408 err = -EBUSY;
2409 break;
2410 }
2411 } else
2412 break;
2413 set_current_state(TASK_INTERRUPTIBLE);
2414 mutex_unlock(&pcm->open_mutex);
2415 schedule();
2416 mutex_lock(&pcm->open_mutex);
2417 if (signal_pending(current)) {
2418 err = -ERESTARTSYS;
2419 break;
2420 }
2421 }
2422 remove_wait_queue(&pcm->open_wait, &wait);
2423 mutex_unlock(&pcm->open_mutex);
2424 if (err < 0)
2425 goto __error;
2426 return err;
2427
2428 __error:
2429 module_put(pcm->card->module);
2430 __error2:
2431 snd_card_file_remove(pcm->card, file);
2432 __error1:
2433 return err;
2434 }
2435
2436 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2437 {
2438 struct snd_pcm *pcm;
2439 struct snd_pcm_substream *substream;
2440 struct snd_pcm_oss_file *pcm_oss_file;
2441
2442 pcm_oss_file = file->private_data;
2443 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2444 if (substream == NULL)
2445 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2446 if (snd_BUG_ON(!substream))
2447 return -ENXIO;
2448 pcm = substream->pcm;
2449 if (!pcm->card->shutdown)
2450 snd_pcm_oss_sync(pcm_oss_file);
2451 mutex_lock(&pcm->open_mutex);
2452 snd_pcm_oss_release_file(pcm_oss_file);
2453 mutex_unlock(&pcm->open_mutex);
2454 wake_up(&pcm->open_wait);
2455 module_put(pcm->card->module);
2456 snd_card_file_remove(pcm->card, file);
2457 return 0;
2458 }
2459
2460 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2461 {
2462 struct snd_pcm_oss_file *pcm_oss_file;
2463 int __user *p = (int __user *)arg;
2464 int res;
2465
2466 pcm_oss_file = file->private_data;
2467 if (cmd == OSS_GETVERSION)
2468 return put_user(SNDRV_OSS_VERSION, p);
2469 if (cmd == OSS_ALSAEMULVER)
2470 return put_user(1, p);
2471 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2472 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2473 struct snd_pcm_substream *substream;
2474 int idx;
2475 for (idx = 0; idx < 2; ++idx) {
2476 substream = pcm_oss_file->streams[idx];
2477 if (substream != NULL)
2478 break;
2479 }
2480 if (snd_BUG_ON(idx >= 2))
2481 return -ENXIO;
2482 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2483 }
2484 #endif
2485 if (((cmd >> 8) & 0xff) != 'P')
2486 return -EINVAL;
2487 #ifdef OSS_DEBUG
2488 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2489 #endif
2490 switch (cmd) {
2491 case SNDCTL_DSP_RESET:
2492 return snd_pcm_oss_reset(pcm_oss_file);
2493 case SNDCTL_DSP_SYNC:
2494 return snd_pcm_oss_sync(pcm_oss_file);
2495 case SNDCTL_DSP_SPEED:
2496 if (get_user(res, p))
2497 return -EFAULT;
2498 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2499 return res;
2500 return put_user(res, p);
2501 case SOUND_PCM_READ_RATE:
2502 res = snd_pcm_oss_get_rate(pcm_oss_file);
2503 if (res < 0)
2504 return res;
2505 return put_user(res, p);
2506 case SNDCTL_DSP_STEREO:
2507 if (get_user(res, p))
2508 return -EFAULT;
2509 res = res > 0 ? 2 : 1;
2510 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2511 return res;
2512 return put_user(--res, p);
2513 case SNDCTL_DSP_GETBLKSIZE:
2514 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2515 if (res < 0)
2516 return res;
2517 return put_user(res, p);
2518 case SNDCTL_DSP_SETFMT:
2519 if (get_user(res, p))
2520 return -EFAULT;
2521 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2522 if (res < 0)
2523 return res;
2524 return put_user(res, p);
2525 case SOUND_PCM_READ_BITS:
2526 res = snd_pcm_oss_get_format(pcm_oss_file);
2527 if (res < 0)
2528 return res;
2529 return put_user(res, p);
2530 case SNDCTL_DSP_CHANNELS:
2531 if (get_user(res, p))
2532 return -EFAULT;
2533 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2534 if (res < 0)
2535 return res;
2536 return put_user(res, p);
2537 case SOUND_PCM_READ_CHANNELS:
2538 res = snd_pcm_oss_get_channels(pcm_oss_file);
2539 if (res < 0)
2540 return res;
2541 return put_user(res, p);
2542 case SOUND_PCM_WRITE_FILTER:
2543 case SOUND_PCM_READ_FILTER:
2544 return -EIO;
2545 case SNDCTL_DSP_POST:
2546 return snd_pcm_oss_post(pcm_oss_file);
2547 case SNDCTL_DSP_SUBDIVIDE:
2548 if (get_user(res, p))
2549 return -EFAULT;
2550 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2551 if (res < 0)
2552 return res;
2553 return put_user(res, p);
2554 case SNDCTL_DSP_SETFRAGMENT:
2555 if (get_user(res, p))
2556 return -EFAULT;
2557 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2558 case SNDCTL_DSP_GETFMTS:
2559 res = snd_pcm_oss_get_formats(pcm_oss_file);
2560 if (res < 0)
2561 return res;
2562 return put_user(res, p);
2563 case SNDCTL_DSP_GETOSPACE:
2564 case SNDCTL_DSP_GETISPACE:
2565 return snd_pcm_oss_get_space(pcm_oss_file,
2566 cmd == SNDCTL_DSP_GETISPACE ?
2567 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2568 (struct audio_buf_info __user *) arg);
2569 case SNDCTL_DSP_NONBLOCK:
2570 return snd_pcm_oss_nonblock(file);
2571 case SNDCTL_DSP_GETCAPS:
2572 res = snd_pcm_oss_get_caps(pcm_oss_file);
2573 if (res < 0)
2574 return res;
2575 return put_user(res, p);
2576 case SNDCTL_DSP_GETTRIGGER:
2577 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2578 if (res < 0)
2579 return res;
2580 return put_user(res, p);
2581 case SNDCTL_DSP_SETTRIGGER:
2582 if (get_user(res, p))
2583 return -EFAULT;
2584 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2585 case SNDCTL_DSP_GETIPTR:
2586 case SNDCTL_DSP_GETOPTR:
2587 return snd_pcm_oss_get_ptr(pcm_oss_file,
2588 cmd == SNDCTL_DSP_GETIPTR ?
2589 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2590 (struct count_info __user *) arg);
2591 case SNDCTL_DSP_MAPINBUF:
2592 case SNDCTL_DSP_MAPOUTBUF:
2593 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2594 cmd == SNDCTL_DSP_MAPINBUF ?
2595 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2596 (struct buffmem_desc __user *) arg);
2597 case SNDCTL_DSP_SETSYNCRO:
2598 /* stop DMA now.. */
2599 return 0;
2600 case SNDCTL_DSP_SETDUPLEX:
2601 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2602 return 0;
2603 return -EIO;
2604 case SNDCTL_DSP_GETODELAY:
2605 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2606 if (res < 0) {
2607 /* it's for sure, some broken apps don't check for error codes */
2608 put_user(0, p);
2609 return res;
2610 }
2611 return put_user(res, p);
2612 case SNDCTL_DSP_PROFILE:
2613 return 0; /* silently ignore */
2614 default:
2615 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2616 }
2617 return -EINVAL;
2618 }
2619
2620 #ifdef CONFIG_COMPAT
2621 /* all compatible */
2622 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2623 #else
2624 #define snd_pcm_oss_ioctl_compat NULL
2625 #endif
2626
2627 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2628 {
2629 struct snd_pcm_oss_file *pcm_oss_file;
2630 struct snd_pcm_substream *substream;
2631
2632 pcm_oss_file = file->private_data;
2633 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2634 if (substream == NULL)
2635 return -ENXIO;
2636 substream->f_flags = file->f_flags & O_NONBLOCK;
2637 #ifndef OSS_DEBUG
2638 return snd_pcm_oss_read1(substream, buf, count);
2639 #else
2640 {
2641 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2642 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2643 "(returned %li bytes)\n", (long)count, (long)res);
2644 return res;
2645 }
2646 #endif
2647 }
2648
2649 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2650 {
2651 struct snd_pcm_oss_file *pcm_oss_file;
2652 struct snd_pcm_substream *substream;
2653 long result;
2654
2655 pcm_oss_file = file->private_data;
2656 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2657 if (substream == NULL)
2658 return -ENXIO;
2659 substream->f_flags = file->f_flags & O_NONBLOCK;
2660 result = snd_pcm_oss_write1(substream, buf, count);
2661 #ifdef OSS_DEBUG
2662 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2663 (long)count, (long)result);
2664 #endif
2665 return result;
2666 }
2667
2668 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2669 {
2670 struct snd_pcm_runtime *runtime = substream->runtime;
2671 if (atomic_read(&substream->mmap_count))
2672 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2673 else
2674 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2675 }
2676
2677 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2678 {
2679 struct snd_pcm_runtime *runtime = substream->runtime;
2680 if (atomic_read(&substream->mmap_count))
2681 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2682 else
2683 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2684 }
2685
2686 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2687 {
2688 struct snd_pcm_oss_file *pcm_oss_file;
2689 unsigned int mask;
2690 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2691
2692 pcm_oss_file = file->private_data;
2693
2694 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2695 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2696
2697 mask = 0;
2698 if (psubstream != NULL) {
2699 struct snd_pcm_runtime *runtime = psubstream->runtime;
2700 poll_wait(file, &runtime->sleep, wait);
2701 snd_pcm_stream_lock_irq(psubstream);
2702 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2703 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2704 snd_pcm_oss_playback_ready(psubstream)))
2705 mask |= POLLOUT | POLLWRNORM;
2706 snd_pcm_stream_unlock_irq(psubstream);
2707 }
2708 if (csubstream != NULL) {
2709 struct snd_pcm_runtime *runtime = csubstream->runtime;
2710 snd_pcm_state_t ostate;
2711 poll_wait(file, &runtime->sleep, wait);
2712 snd_pcm_stream_lock_irq(csubstream);
2713 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2714 snd_pcm_oss_capture_ready(csubstream))
2715 mask |= POLLIN | POLLRDNORM;
2716 snd_pcm_stream_unlock_irq(csubstream);
2717 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2718 struct snd_pcm_oss_file ofile;
2719 memset(&ofile, 0, sizeof(ofile));
2720 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2721 runtime->oss.trigger = 0;
2722 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2723 }
2724 }
2725
2726 return mask;
2727 }
2728
2729 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2730 {
2731 struct snd_pcm_oss_file *pcm_oss_file;
2732 struct snd_pcm_substream *substream = NULL;
2733 struct snd_pcm_runtime *runtime;
2734 int err;
2735
2736 #ifdef OSS_DEBUG
2737 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2738 #endif
2739 pcm_oss_file = file->private_data;
2740 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2741 case VM_READ | VM_WRITE:
2742 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2743 if (substream)
2744 break;
2745 /* Fall through */
2746 case VM_READ:
2747 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2748 break;
2749 case VM_WRITE:
2750 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2751 break;
2752 default:
2753 return -EINVAL;
2754 }
2755 /* set VM_READ access as well to fix memset() routines that do
2756 reads before writes (to improve performance) */
2757 area->vm_flags |= VM_READ;
2758 if (substream == NULL)
2759 return -ENXIO;
2760 runtime = substream->runtime;
2761 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2762 return -EIO;
2763 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2764 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2765 else
2766 return -EIO;
2767
2768 if (runtime->oss.params) {
2769 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2770 return err;
2771 }
2772 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2773 if (runtime->oss.plugin_first != NULL)
2774 return -EIO;
2775 #endif
2776
2777 if (area->vm_pgoff != 0)
2778 return -EINVAL;
2779
2780 err = snd_pcm_mmap_data(substream, file, area);
2781 if (err < 0)
2782 return err;
2783 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2784 runtime->silence_threshold = 0;
2785 runtime->silence_size = 0;
2786 #ifdef OSS_DEBUG
2787 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2788 runtime->oss.mmap_bytes);
2789 #endif
2790 /* In mmap mode we never stop */
2791 runtime->stop_threshold = runtime->boundary;
2792
2793 return 0;
2794 }
2795
2796 #ifdef CONFIG_SND_VERBOSE_PROCFS
2797 /*
2798 * /proc interface
2799 */
2800
2801 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2802 struct snd_info_buffer *buffer)
2803 {
2804 struct snd_pcm_str *pstr = entry->private_data;
2805 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2806 mutex_lock(&pstr->oss.setup_mutex);
2807 while (setup) {
2808 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2809 setup->task_name,
2810 setup->periods,
2811 setup->period_size,
2812 setup->disable ? " disable" : "",
2813 setup->direct ? " direct" : "",
2814 setup->block ? " block" : "",
2815 setup->nonblock ? " non-block" : "",
2816 setup->partialfrag ? " partial-frag" : "",
2817 setup->nosilence ? " no-silence" : "");
2818 setup = setup->next;
2819 }
2820 mutex_unlock(&pstr->oss.setup_mutex);
2821 }
2822
2823 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2824 {
2825 struct snd_pcm_oss_setup *setup, *setupn;
2826
2827 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2828 setup; setup = setupn) {
2829 setupn = setup->next;
2830 kfree(setup->task_name);
2831 kfree(setup);
2832 }
2833 pstr->oss.setup_list = NULL;
2834 }
2835
2836 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2837 struct snd_info_buffer *buffer)
2838 {
2839 struct snd_pcm_str *pstr = entry->private_data;
2840 char line[128], str[32], task_name[32], *ptr;
2841 int idx1;
2842 struct snd_pcm_oss_setup *setup, *setup1, template;
2843
2844 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2845 mutex_lock(&pstr->oss.setup_mutex);
2846 memset(&template, 0, sizeof(template));
2847 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2848 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2849 snd_pcm_oss_proc_free_setup_list(pstr);
2850 mutex_unlock(&pstr->oss.setup_mutex);
2851 continue;
2852 }
2853 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2854 if (!strcmp(setup->task_name, task_name)) {
2855 template = *setup;
2856 break;
2857 }
2858 }
2859 ptr = snd_info_get_str(str, ptr, sizeof(str));
2860 template.periods = simple_strtoul(str, NULL, 10);
2861 ptr = snd_info_get_str(str, ptr, sizeof(str));
2862 template.period_size = simple_strtoul(str, NULL, 10);
2863 for (idx1 = 31; idx1 >= 0; idx1--)
2864 if (template.period_size & (1 << idx1))
2865 break;
2866 for (idx1--; idx1 >= 0; idx1--)
2867 template.period_size &= ~(1 << idx1);
2868 do {
2869 ptr = snd_info_get_str(str, ptr, sizeof(str));
2870 if (!strcmp(str, "disable")) {
2871 template.disable = 1;
2872 } else if (!strcmp(str, "direct")) {
2873 template.direct = 1;
2874 } else if (!strcmp(str, "block")) {
2875 template.block = 1;
2876 } else if (!strcmp(str, "non-block")) {
2877 template.nonblock = 1;
2878 } else if (!strcmp(str, "partial-frag")) {
2879 template.partialfrag = 1;
2880 } else if (!strcmp(str, "no-silence")) {
2881 template.nosilence = 1;
2882 } else if (!strcmp(str, "buggy-ptr")) {
2883 template.buggyptr = 1;
2884 }
2885 } while (*str);
2886 if (setup == NULL) {
2887 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2888 if (! setup) {
2889 buffer->error = -ENOMEM;
2890 mutex_unlock(&pstr->oss.setup_mutex);
2891 return;
2892 }
2893 if (pstr->oss.setup_list == NULL)
2894 pstr->oss.setup_list = setup;
2895 else {
2896 for (setup1 = pstr->oss.setup_list;
2897 setup1->next; setup1 = setup1->next);
2898 setup1->next = setup;
2899 }
2900 template.task_name = kstrdup(task_name, GFP_KERNEL);
2901 if (! template.task_name) {
2902 kfree(setup);
2903 buffer->error = -ENOMEM;
2904 mutex_unlock(&pstr->oss.setup_mutex);
2905 return;
2906 }
2907 }
2908 *setup = template;
2909 mutex_unlock(&pstr->oss.setup_mutex);
2910 }
2911 }
2912
2913 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2914 {
2915 int stream;
2916 for (stream = 0; stream < 2; ++stream) {
2917 struct snd_info_entry *entry;
2918 struct snd_pcm_str *pstr = &pcm->streams[stream];
2919 if (pstr->substream_count == 0)
2920 continue;
2921 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2922 entry->content = SNDRV_INFO_CONTENT_TEXT;
2923 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2924 entry->c.text.read = snd_pcm_oss_proc_read;
2925 entry->c.text.write = snd_pcm_oss_proc_write;
2926 entry->private_data = pstr;
2927 if (snd_info_register(entry) < 0) {
2928 snd_info_free_entry(entry);
2929 entry = NULL;
2930 }
2931 }
2932 pstr->oss.proc_entry = entry;
2933 }
2934 }
2935
2936 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2937 {
2938 int stream;
2939 for (stream = 0; stream < 2; ++stream) {
2940 struct snd_pcm_str *pstr = &pcm->streams[stream];
2941 snd_info_free_entry(pstr->oss.proc_entry);
2942 pstr->oss.proc_entry = NULL;
2943 snd_pcm_oss_proc_free_setup_list(pstr);
2944 }
2945 }
2946 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2947 #define snd_pcm_oss_proc_init(pcm)
2948 #define snd_pcm_oss_proc_done(pcm)
2949 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2950
2951 /*
2952 * ENTRY functions
2953 */
2954
2955 static const struct file_operations snd_pcm_oss_f_reg =
2956 {
2957 .owner = THIS_MODULE,
2958 .read = snd_pcm_oss_read,
2959 .write = snd_pcm_oss_write,
2960 .open = snd_pcm_oss_open,
2961 .release = snd_pcm_oss_release,
2962 .poll = snd_pcm_oss_poll,
2963 .unlocked_ioctl = snd_pcm_oss_ioctl,
2964 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2965 .mmap = snd_pcm_oss_mmap,
2966 };
2967
2968 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2969 {
2970 char name[128];
2971 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2972 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2973 pcm->card, index, &snd_pcm_oss_f_reg,
2974 pcm, name) < 0) {
2975 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2976 pcm->card->number, pcm->device);
2977 }
2978 }
2979
2980 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2981 {
2982 pcm->oss.reg = 0;
2983 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2984 char name[128];
2985 int duplex;
2986 register_oss_dsp(pcm, 0);
2987 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2988 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2989 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2990 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2991 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2992 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2993 pcm->card->number,
2994 name);
2995 #endif
2996 pcm->oss.reg++;
2997 pcm->oss.reg_mask |= 1;
2998 }
2999 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3000 register_oss_dsp(pcm, 1);
3001 pcm->oss.reg++;
3002 pcm->oss.reg_mask |= 2;
3003 }
3004
3005 if (pcm->oss.reg)
3006 snd_pcm_oss_proc_init(pcm);
3007
3008 return 0;
3009 }
3010
3011 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3012 {
3013 if (pcm->oss.reg) {
3014 if (pcm->oss.reg_mask & 1) {
3015 pcm->oss.reg_mask &= ~1;
3016 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3017 pcm->card, 0);
3018 }
3019 if (pcm->oss.reg_mask & 2) {
3020 pcm->oss.reg_mask &= ~2;
3021 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3022 pcm->card, 1);
3023 }
3024 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3025 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3026 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3027 #endif
3028 }
3029 pcm->oss.reg = 0;
3030 }
3031 return 0;
3032 }
3033
3034 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3035 {
3036 snd_pcm_oss_disconnect_minor(pcm);
3037 snd_pcm_oss_proc_done(pcm);
3038 return 0;
3039 }
3040
3041 static struct snd_pcm_notify snd_pcm_oss_notify =
3042 {
3043 .n_register = snd_pcm_oss_register_minor,
3044 .n_disconnect = snd_pcm_oss_disconnect_minor,
3045 .n_unregister = snd_pcm_oss_unregister_minor,
3046 };
3047
3048 static int __init alsa_pcm_oss_init(void)
3049 {
3050 int i;
3051 int err;
3052
3053 /* check device map table */
3054 for (i = 0; i < SNDRV_CARDS; i++) {
3055 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3056 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3057 i, dsp_map[i]);
3058 dsp_map[i] = 0;
3059 }
3060 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3061 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3062 i, adsp_map[i]);
3063 adsp_map[i] = 1;
3064 }
3065 }
3066 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3067 return err;
3068 return 0;
3069 }
3070
3071 static void __exit alsa_pcm_oss_exit(void)
3072 {
3073 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3074 }
3075
3076 module_init(alsa_pcm_oss_init)
3077 module_exit(alsa_pcm_oss_exit)
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