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ALSA: pcm_oss, fix locking typo
[linux/fpc-iii.git] / sound / core / oss / pcm_oss.c
blob35afb418e4df0c6218f3587c77a8ee2247b88f74
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 snd_assert(max >= 0, return -EINVAL);
456 last = 1;
457 }
458 _end:
459 kfree(save);
460 if (last)
461 v = snd_pcm_hw_param_last(pcm, params, var, dir);
462 else
463 v = snd_pcm_hw_param_first(pcm, params, var, dir);
464 snd_assert(v >= 0, return -EINVAL);
465 return v;
466 }
467
468 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
469 snd_pcm_hw_param_t var, unsigned int val,
470 int dir)
471 {
472 int changed;
473 if (hw_is_mask(var)) {
474 struct snd_mask *m = hw_param_mask(params, var);
475 if (val == 0 && dir < 0) {
476 changed = -EINVAL;
477 snd_mask_none(m);
478 } else {
479 if (dir > 0)
480 val++;
481 else if (dir < 0)
482 val--;
483 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
484 }
485 } else if (hw_is_interval(var)) {
486 struct snd_interval *i = hw_param_interval(params, var);
487 if (val == 0 && dir < 0) {
488 changed = -EINVAL;
489 snd_interval_none(i);
490 } else if (dir == 0)
491 changed = snd_interval_refine_set(i, val);
492 else {
493 struct snd_interval t;
494 t.openmin = 1;
495 t.openmax = 1;
496 t.empty = 0;
497 t.integer = 0;
498 if (dir < 0) {
499 t.min = val - 1;
500 t.max = val;
501 } else {
502 t.min = val;
503 t.max = val+1;
504 }
505 changed = snd_interval_refine(i, &t);
506 }
507 } else
508 return -EINVAL;
509 if (changed) {
510 params->cmask |= 1 << var;
511 params->rmask |= 1 << var;
512 }
513 return changed;
514 }
515
516 /**
517 * snd_pcm_hw_param_set
518 * @pcm: PCM instance
519 * @params: the hw_params instance
520 * @var: parameter to retrieve
521 * @val: value to set
522 * @dir: pointer to the direction (-1,0,1) or NULL
523 *
524 * Inside configuration space defined by PARAMS remove from PAR all
525 * values != VAL. Reduce configuration space accordingly.
526 * Return VAL or -EINVAL if the configuration space is empty
527 */
528 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
529 struct snd_pcm_hw_params *params,
530 snd_pcm_hw_param_t var, unsigned int val,
531 int dir)
532 {
533 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
534 if (changed < 0)
535 return changed;
536 if (params->rmask) {
537 int err = snd_pcm_hw_refine(pcm, params);
538 if (err < 0)
539 return err;
540 }
541 return snd_pcm_hw_param_value(params, var, NULL);
542 }
543
544 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
545 snd_pcm_hw_param_t var)
546 {
547 int changed;
548 changed = snd_interval_setinteger(hw_param_interval(params, var));
549 if (changed) {
550 params->cmask |= 1 << var;
551 params->rmask |= 1 << var;
552 }
553 return changed;
554 }
555
556 /*
557 * plugin
558 */
559
560 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
561 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
562 {
563 struct snd_pcm_runtime *runtime = substream->runtime;
564 struct snd_pcm_plugin *plugin, *next;
565
566 plugin = runtime->oss.plugin_first;
567 while (plugin) {
568 next = plugin->next;
569 snd_pcm_plugin_free(plugin);
570 plugin = next;
571 }
572 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
573 return 0;
574 }
575
576 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
577 {
578 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
579 plugin->next = runtime->oss.plugin_first;
580 plugin->prev = NULL;
581 if (runtime->oss.plugin_first) {
582 runtime->oss.plugin_first->prev = plugin;
583 runtime->oss.plugin_first = plugin;
584 } else {
585 runtime->oss.plugin_last =
586 runtime->oss.plugin_first = plugin;
587 }
588 return 0;
589 }
590
591 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
592 {
593 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
594 plugin->next = NULL;
595 plugin->prev = runtime->oss.plugin_last;
596 if (runtime->oss.plugin_last) {
597 runtime->oss.plugin_last->next = plugin;
598 runtime->oss.plugin_last = plugin;
599 } else {
600 runtime->oss.plugin_last =
601 runtime->oss.plugin_first = plugin;
602 }
603 return 0;
604 }
605 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
606
607 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
608 {
609 struct snd_pcm_runtime *runtime = substream->runtime;
610 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
611 long bytes = frames_to_bytes(runtime, frames);
612 if (buffer_size == runtime->oss.buffer_bytes)
613 return bytes;
614 #if BITS_PER_LONG >= 64
615 return runtime->oss.buffer_bytes * bytes / buffer_size;
616 #else
617 {
618 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
619 u32 rem;
620 div64_32(&bsize, buffer_size, &rem);
621 return (long)bsize;
622 }
623 #endif
624 }
625
626 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
627 {
628 struct snd_pcm_runtime *runtime = substream->runtime;
629 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
630 if (buffer_size == runtime->oss.buffer_bytes)
631 return bytes_to_frames(runtime, bytes);
632 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
633 }
634
635 /* define extended formats in the recent OSS versions (if any) */
636 /* linear formats */
637 #define AFMT_S32_LE 0x00001000
638 #define AFMT_S32_BE 0x00002000
639 #define AFMT_S24_LE 0x00008000
640 #define AFMT_S24_BE 0x00010000
641 #define AFMT_S24_PACKED 0x00040000
642
643 /* other supported formats */
644 #define AFMT_FLOAT 0x00004000
645 #define AFMT_SPDIF_RAW 0x00020000
646
647 /* unsupported formats */
648 #define AFMT_AC3 0x00000400
649 #define AFMT_VORBIS 0x00000800
650
651 static int snd_pcm_oss_format_from(int format)
652 {
653 switch (format) {
654 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
655 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
656 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
657 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
658 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
659 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
660 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
661 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
662 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
663 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
664 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
665 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
666 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
667 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
668 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
669 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
670 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
671 default: return SNDRV_PCM_FORMAT_U8;
672 }
673 }
674
675 static int snd_pcm_oss_format_to(int format)
676 {
677 switch (format) {
678 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
679 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
680 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
681 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
682 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
683 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
684 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
685 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
686 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
687 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
688 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
689 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
690 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
691 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
692 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
693 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
694 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
695 default: return -EINVAL;
696 }
697 }
698
699 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
700 struct snd_pcm_hw_params *oss_params,
701 struct snd_pcm_hw_params *slave_params)
702 {
703 size_t s;
704 size_t oss_buffer_size, oss_period_size, oss_periods;
705 size_t min_period_size, max_period_size;
706 struct snd_pcm_runtime *runtime = substream->runtime;
707 size_t oss_frame_size;
708
709 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
710 params_channels(oss_params) / 8;
711
712 oss_buffer_size = snd_pcm_plug_client_size(substream,
713 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
714 oss_buffer_size = 1 << ld2(oss_buffer_size);
715 if (atomic_read(&substream->mmap_count)) {
716 if (oss_buffer_size > runtime->oss.mmap_bytes)
717 oss_buffer_size = runtime->oss.mmap_bytes;
718 }
719
720 if (substream->oss.setup.period_size > 16)
721 oss_period_size = substream->oss.setup.period_size;
722 else if (runtime->oss.fragshift) {
723 oss_period_size = 1 << runtime->oss.fragshift;
724 if (oss_period_size > oss_buffer_size / 2)
725 oss_period_size = oss_buffer_size / 2;
726 } else {
727 int sd;
728 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
729
730 oss_period_size = oss_buffer_size;
731 do {
732 oss_period_size /= 2;
733 } while (oss_period_size > bytes_per_sec);
734 if (runtime->oss.subdivision == 0) {
735 sd = 4;
736 if (oss_period_size / sd > 4096)
737 sd *= 2;
738 if (oss_period_size / sd < 4096)
739 sd = 1;
740 } else
741 sd = runtime->oss.subdivision;
742 oss_period_size /= sd;
743 if (oss_period_size < 16)
744 oss_period_size = 16;
745 }
746
747 min_period_size = snd_pcm_plug_client_size(substream,
748 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
749 min_period_size *= oss_frame_size;
750 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
751 if (oss_period_size < min_period_size)
752 oss_period_size = min_period_size;
753
754 max_period_size = snd_pcm_plug_client_size(substream,
755 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
756 max_period_size *= oss_frame_size;
757 max_period_size = 1 << ld2(max_period_size);
758 if (oss_period_size > max_period_size)
759 oss_period_size = max_period_size;
760
761 oss_periods = oss_buffer_size / oss_period_size;
762
763 if (substream->oss.setup.periods > 1)
764 oss_periods = substream->oss.setup.periods;
765
766 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
767 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
768 s = runtime->oss.maxfrags;
769 if (oss_periods > s)
770 oss_periods = s;
771
772 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
773 if (s < 2)
774 s = 2;
775 if (oss_periods < s)
776 oss_periods = s;
777
778 while (oss_period_size * oss_periods > oss_buffer_size)
779 oss_period_size /= 2;
780
781 snd_assert(oss_period_size >= 16, return -EINVAL);
782 runtime->oss.period_bytes = oss_period_size;
783 runtime->oss.period_frames = 1;
784 runtime->oss.periods = oss_periods;
785 return 0;
786 }
787
788 static int choose_rate(struct snd_pcm_substream *substream,
789 struct snd_pcm_hw_params *params, unsigned int best_rate)
790 {
791 struct snd_interval *it;
792 struct snd_pcm_hw_params *save;
793 unsigned int rate, prev;
794
795 save = kmalloc(sizeof(*save), GFP_KERNEL);
796 if (save == NULL)
797 return -ENOMEM;
798 *save = *params;
799 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
800
801 /* try multiples of the best rate */
802 rate = best_rate;
803 for (;;) {
804 if (it->max < rate || (it->max == rate && it->openmax))
805 break;
806 if (it->min < rate || (it->min == rate && !it->openmin)) {
807 int ret;
808 ret = snd_pcm_hw_param_set(substream, params,
809 SNDRV_PCM_HW_PARAM_RATE,
810 rate, 0);
811 if (ret == (int)rate) {
812 kfree(save);
813 return rate;
814 }
815 *params = *save;
816 }
817 prev = rate;
818 rate += best_rate;
819 if (rate <= prev)
820 break;
821 }
822
823 /* not found, use the nearest rate */
824 kfree(save);
825 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
826 }
827
828 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
829 {
830 struct snd_pcm_runtime *runtime = substream->runtime;
831 struct snd_pcm_hw_params *params, *sparams;
832 struct snd_pcm_sw_params *sw_params;
833 ssize_t oss_buffer_size, oss_period_size;
834 size_t oss_frame_size;
835 int err;
836 int direct;
837 int format, sformat, n;
838 struct snd_mask sformat_mask;
839 struct snd_mask mask;
840
841 if (mutex_lock_interruptible(&runtime->oss.params_lock))
842 return -EINTR;
843 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
844 params = kmalloc(sizeof(*params), GFP_KERNEL);
845 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
846 if (!sw_params || !params || !sparams) {
847 snd_printd("No memory\n");
848 err = -ENOMEM;
849 goto failure;
850 }
851
852 if (atomic_read(&substream->mmap_count))
853 direct = 1;
854 else
855 direct = substream->oss.setup.direct;
856
857 _snd_pcm_hw_params_any(sparams);
858 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
859 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
860 snd_mask_none(&mask);
861 if (atomic_read(&substream->mmap_count))
862 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
863 else {
864 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
865 if (!direct)
866 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
867 }
868 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
869 if (err < 0) {
870 snd_printd("No usable accesses\n");
871 err = -EINVAL;
872 goto failure;
873 }
874 choose_rate(substream, sparams, runtime->oss.rate);
875 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
876
877 format = snd_pcm_oss_format_from(runtime->oss.format);
878
879 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
880 if (direct)
881 sformat = format;
882 else
883 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
884
885 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
886 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
887 if (snd_mask_test(&sformat_mask, sformat) &&
888 snd_pcm_oss_format_to(sformat) >= 0)
889 break;
890 }
891 if (sformat > SNDRV_PCM_FORMAT_LAST) {
892 snd_printd("Cannot find a format!!!\n");
893 err = -EINVAL;
894 goto failure;
895 }
896 }
897 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
898 snd_assert(err >= 0, goto failure);
899
900 if (direct) {
901 memcpy(params, sparams, sizeof(*params));
902 } else {
903 _snd_pcm_hw_params_any(params);
904 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
905 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
906 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
907 snd_pcm_oss_format_from(runtime->oss.format), 0);
908 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
909 runtime->oss.channels, 0);
910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
911 runtime->oss.rate, 0);
912 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
913 params_access(params), params_format(params),
914 params_channels(params), params_rate(params));
915 }
916 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
917 params_access(sparams), params_format(sparams),
918 params_channels(sparams), params_rate(sparams));
919
920 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
921 params_channels(params) / 8;
922
923 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
924 snd_pcm_oss_plugin_clear(substream);
925 if (!direct) {
926 /* add necessary plugins */
927 snd_pcm_oss_plugin_clear(substream);
928 if ((err = snd_pcm_plug_format_plugins(substream,
929 params,
930 sparams)) < 0) {
931 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
932 snd_pcm_oss_plugin_clear(substream);
933 goto failure;
934 }
935 if (runtime->oss.plugin_first) {
936 struct snd_pcm_plugin *plugin;
937 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
938 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
939 snd_pcm_oss_plugin_clear(substream);
940 goto failure;
941 }
942 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
943 err = snd_pcm_plugin_append(plugin);
944 } else {
945 err = snd_pcm_plugin_insert(plugin);
946 }
947 if (err < 0) {
948 snd_pcm_oss_plugin_clear(substream);
949 goto failure;
950 }
951 }
952 }
953 #endif
954
955 err = snd_pcm_oss_period_size(substream, params, sparams);
956 if (err < 0)
957 goto failure;
958
959 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
960 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
961 snd_assert(err >= 0, goto failure);
962
963 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
964 runtime->oss.periods, NULL);
965 snd_assert(err >= 0, goto failure);
966
967 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
968
969 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
970 snd_printd("HW_PARAMS failed: %i\n", err);
971 goto failure;
972 }
973
974 memset(sw_params, 0, sizeof(*sw_params));
975 if (runtime->oss.trigger) {
976 sw_params->start_threshold = 1;
977 } else {
978 sw_params->start_threshold = runtime->boundary;
979 }
980 if (atomic_read(&substream->mmap_count) ||
981 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
982 sw_params->stop_threshold = runtime->boundary;
983 else
984 sw_params->stop_threshold = runtime->buffer_size;
985 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
986 sw_params->period_step = 1;
987 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
988 1 : runtime->period_size;
989 if (atomic_read(&substream->mmap_count) ||
990 substream->oss.setup.nosilence) {
991 sw_params->silence_threshold = 0;
992 sw_params->silence_size = 0;
993 } else {
994 snd_pcm_uframes_t frames;
995 frames = runtime->period_size + 16;
996 if (frames > runtime->buffer_size)
997 frames = runtime->buffer_size;
998 sw_params->silence_threshold = frames;
999 sw_params->silence_size = frames;
1000 }
1001
1002 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1003 snd_printd("SW_PARAMS failed: %i\n", err);
1004 goto failure;
1005 }
1006
1007 runtime->oss.periods = params_periods(sparams);
1008 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1009 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
1010 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1011 if (runtime->oss.plugin_first) {
1012 err = snd_pcm_plug_alloc(substream, oss_period_size);
1013 if (err < 0)
1014 goto failure;
1015 }
1016 #endif
1017 oss_period_size *= oss_frame_size;
1018
1019 oss_buffer_size = oss_period_size * runtime->oss.periods;
1020 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
1021
1022 runtime->oss.period_bytes = oss_period_size;
1023 runtime->oss.buffer_bytes = oss_buffer_size;
1024
1025 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1026 runtime->oss.period_bytes,
1027 runtime->oss.buffer_bytes);
1028 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1029 params_period_size(sparams),
1030 params_buffer_size(sparams));
1031
1032 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1033 runtime->oss.channels = params_channels(params);
1034 runtime->oss.rate = params_rate(params);
1035
1036 runtime->oss.params = 0;
1037 runtime->oss.prepare = 1;
1038 vfree(runtime->oss.buffer);
1039 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1040 runtime->oss.buffer_used = 0;
1041 if (runtime->dma_area)
1042 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1043
1044 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1045
1046 err = 0;
1047 failure:
1048 kfree(sw_params);
1049 kfree(params);
1050 kfree(sparams);
1051 mutex_unlock(&runtime->oss.params_lock);
1052 return err;
1053 }
1054
1055 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1056 {
1057 int idx, err;
1058 struct snd_pcm_substream *asubstream = NULL, *substream;
1059
1060 for (idx = 0; idx < 2; idx++) {
1061 substream = pcm_oss_file->streams[idx];
1062 if (substream == NULL)
1063 continue;
1064 if (asubstream == NULL)
1065 asubstream = substream;
1066 if (substream->runtime->oss.params) {
1067 err = snd_pcm_oss_change_params(substream);
1068 if (err < 0)
1069 return err;
1070 }
1071 }
1072 snd_assert(asubstream != NULL, return -EIO);
1073 if (r_substream)
1074 *r_substream = asubstream;
1075 return 0;
1076 }
1077
1078 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1079 {
1080 int err;
1081 struct snd_pcm_runtime *runtime = substream->runtime;
1082
1083 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1084 if (err < 0) {
1085 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1086 return err;
1087 }
1088 runtime->oss.prepare = 0;
1089 runtime->oss.prev_hw_ptr_interrupt = 0;
1090 runtime->oss.period_ptr = 0;
1091 runtime->oss.buffer_used = 0;
1092
1093 return 0;
1094 }
1095
1096 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1097 {
1098 struct snd_pcm_runtime *runtime;
1099 int err;
1100
1101 if (substream == NULL)
1102 return 0;
1103 runtime = substream->runtime;
1104 if (runtime->oss.params) {
1105 err = snd_pcm_oss_change_params(substream);
1106 if (err < 0)
1107 return err;
1108 }
1109 if (runtime->oss.prepare) {
1110 err = snd_pcm_oss_prepare(substream);
1111 if (err < 0)
1112 return err;
1113 }
1114 return 0;
1115 }
1116
1117 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1118 {
1119 struct snd_pcm_runtime *runtime;
1120 snd_pcm_uframes_t frames;
1121 int err = 0;
1122
1123 while (1) {
1124 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1125 if (err < 0)
1126 break;
1127 runtime = substream->runtime;
1128 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1129 break;
1130 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1131 /* until avail(delay) <= buffer_size */
1132 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1133 frames /= runtime->period_size;
1134 frames *= runtime->period_size;
1135 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1136 if (err < 0)
1137 break;
1138 }
1139 return err;
1140 }
1141
1142 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1143 {
1144 struct snd_pcm_runtime *runtime = substream->runtime;
1145 int ret;
1146 while (1) {
1147 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1148 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1149 #ifdef OSS_DEBUG
1150 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1151 printk("pcm_oss: write: recovering from XRUN\n");
1152 else
1153 printk("pcm_oss: write: recovering from SUSPEND\n");
1154 #endif
1155 ret = snd_pcm_oss_prepare(substream);
1156 if (ret < 0)
1157 break;
1158 }
1159 if (in_kernel) {
1160 mm_segment_t fs;
1161 fs = snd_enter_user();
1162 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1163 snd_leave_user(fs);
1164 } else {
1165 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1166 }
1167 if (ret != -EPIPE && ret != -ESTRPIPE)
1168 break;
1169 /* test, if we can't store new data, because the stream */
1170 /* has not been started */
1171 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1172 return -EAGAIN;
1173 }
1174 return ret;
1175 }
1176
1177 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1178 {
1179 struct snd_pcm_runtime *runtime = substream->runtime;
1180 snd_pcm_sframes_t delay;
1181 int ret;
1182 while (1) {
1183 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1184 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1185 #ifdef OSS_DEBUG
1186 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1187 printk("pcm_oss: read: recovering from XRUN\n");
1188 else
1189 printk("pcm_oss: read: recovering from SUSPEND\n");
1190 #endif
1191 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1192 if (ret < 0)
1193 break;
1194 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1195 ret = snd_pcm_oss_prepare(substream);
1196 if (ret < 0)
1197 break;
1198 }
1199 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1200 if (ret < 0)
1201 break;
1202 if (in_kernel) {
1203 mm_segment_t fs;
1204 fs = snd_enter_user();
1205 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1206 snd_leave_user(fs);
1207 } else {
1208 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1209 }
1210 if (ret == -EPIPE) {
1211 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1212 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1213 if (ret < 0)
1214 break;
1215 }
1216 continue;
1217 }
1218 if (ret != -ESTRPIPE)
1219 break;
1220 }
1221 return ret;
1222 }
1223
1224 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1225 {
1226 struct snd_pcm_runtime *runtime = substream->runtime;
1227 int ret;
1228 while (1) {
1229 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1230 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1231 #ifdef OSS_DEBUG
1232 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1233 printk("pcm_oss: writev: recovering from XRUN\n");
1234 else
1235 printk("pcm_oss: writev: recovering from SUSPEND\n");
1236 #endif
1237 ret = snd_pcm_oss_prepare(substream);
1238 if (ret < 0)
1239 break;
1240 }
1241 if (in_kernel) {
1242 mm_segment_t fs;
1243 fs = snd_enter_user();
1244 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1245 snd_leave_user(fs);
1246 } else {
1247 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1248 }
1249 if (ret != -EPIPE && ret != -ESTRPIPE)
1250 break;
1251
1252 /* test, if we can't store new data, because the stream */
1253 /* has not been started */
1254 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1255 return -EAGAIN;
1256 }
1257 return ret;
1258 }
1259
1260 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1261 {
1262 struct snd_pcm_runtime *runtime = substream->runtime;
1263 int ret;
1264 while (1) {
1265 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1266 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1267 #ifdef OSS_DEBUG
1268 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1269 printk("pcm_oss: readv: recovering from XRUN\n");
1270 else
1271 printk("pcm_oss: readv: recovering from SUSPEND\n");
1272 #endif
1273 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1274 if (ret < 0)
1275 break;
1276 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1277 ret = snd_pcm_oss_prepare(substream);
1278 if (ret < 0)
1279 break;
1280 }
1281 if (in_kernel) {
1282 mm_segment_t fs;
1283 fs = snd_enter_user();
1284 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1285 snd_leave_user(fs);
1286 } else {
1287 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1288 }
1289 if (ret != -EPIPE && ret != -ESTRPIPE)
1290 break;
1291 }
1292 return ret;
1293 }
1294
1295 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1296 {
1297 struct snd_pcm_runtime *runtime = substream->runtime;
1298 snd_pcm_sframes_t frames, frames1;
1299 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1300 if (runtime->oss.plugin_first) {
1301 struct snd_pcm_plugin_channel *channels;
1302 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1303 if (!in_kernel) {
1304 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1305 return -EFAULT;
1306 buf = runtime->oss.buffer;
1307 }
1308 frames = bytes / oss_frame_bytes;
1309 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1310 if (frames1 < 0)
1311 return frames1;
1312 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1313 if (frames1 <= 0)
1314 return frames1;
1315 bytes = frames1 * oss_frame_bytes;
1316 } else
1317 #endif
1318 {
1319 frames = bytes_to_frames(runtime, bytes);
1320 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1321 if (frames1 <= 0)
1322 return frames1;
1323 bytes = frames_to_bytes(runtime, frames1);
1324 }
1325 return bytes;
1326 }
1327
1328 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1329 {
1330 size_t xfer = 0;
1331 ssize_t tmp;
1332 struct snd_pcm_runtime *runtime = substream->runtime;
1333
1334 if (atomic_read(&substream->mmap_count))
1335 return -ENXIO;
1336
1337 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1338 return tmp;
1339 mutex_lock(&runtime->oss.params_lock);
1340 while (bytes > 0) {
1341 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1342 tmp = bytes;
1343 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1344 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1345 if (tmp > 0) {
1346 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1347 tmp = -EFAULT;
1348 goto err;
1349 }
1350 }
1351 runtime->oss.buffer_used += tmp;
1352 buf += tmp;
1353 bytes -= tmp;
1354 xfer += tmp;
1355 if (substream->oss.setup.partialfrag ||
1356 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1357 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1358 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1359 if (tmp <= 0)
1360 goto err;
1361 runtime->oss.bytes += tmp;
1362 runtime->oss.period_ptr += tmp;
1363 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1364 if (runtime->oss.period_ptr == 0 ||
1365 runtime->oss.period_ptr == runtime->oss.buffer_used)
1366 runtime->oss.buffer_used = 0;
1367 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1368 tmp = -EAGAIN;
1369 goto err;
1370 }
1371 }
1372 } else {
1373 tmp = snd_pcm_oss_write2(substream,
1374 (const char __force *)buf,
1375 runtime->oss.period_bytes, 0);
1376 if (tmp <= 0)
1377 goto err;
1378 runtime->oss.bytes += tmp;
1379 buf += tmp;
1380 bytes -= tmp;
1381 xfer += tmp;
1382 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1383 tmp != runtime->oss.period_bytes)
1384 break;
1385 }
1386 }
1387 mutex_unlock(&runtime->oss.params_lock);
1388 return xfer;
1389
1390 err:
1391 mutex_unlock(&runtime->oss.params_lock);
1392 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1393 }
1394
1395 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1396 {
1397 struct snd_pcm_runtime *runtime = substream->runtime;
1398 snd_pcm_sframes_t frames, frames1;
1399 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1400 char __user *final_dst = (char __user *)buf;
1401 if (runtime->oss.plugin_first) {
1402 struct snd_pcm_plugin_channel *channels;
1403 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1404 if (!in_kernel)
1405 buf = runtime->oss.buffer;
1406 frames = bytes / oss_frame_bytes;
1407 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1408 if (frames1 < 0)
1409 return frames1;
1410 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1411 if (frames1 <= 0)
1412 return frames1;
1413 bytes = frames1 * oss_frame_bytes;
1414 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1415 return -EFAULT;
1416 } else
1417 #endif
1418 {
1419 frames = bytes_to_frames(runtime, bytes);
1420 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1421 if (frames1 <= 0)
1422 return frames1;
1423 bytes = frames_to_bytes(runtime, frames1);
1424 }
1425 return bytes;
1426 }
1427
1428 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1429 {
1430 size_t xfer = 0;
1431 ssize_t tmp;
1432 struct snd_pcm_runtime *runtime = substream->runtime;
1433
1434 if (atomic_read(&substream->mmap_count))
1435 return -ENXIO;
1436
1437 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1438 return tmp;
1439 mutex_lock(&runtime->oss.params_lock);
1440 while (bytes > 0) {
1441 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1442 if (runtime->oss.buffer_used == 0) {
1443 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1444 if (tmp <= 0)
1445 goto err;
1446 runtime->oss.bytes += tmp;
1447 runtime->oss.period_ptr = tmp;
1448 runtime->oss.buffer_used = tmp;
1449 }
1450 tmp = bytes;
1451 if ((size_t) tmp > runtime->oss.buffer_used)
1452 tmp = runtime->oss.buffer_used;
1453 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1454 tmp = -EFAULT;
1455 goto err;
1456 }
1457 buf += tmp;
1458 bytes -= tmp;
1459 xfer += tmp;
1460 runtime->oss.buffer_used -= tmp;
1461 } else {
1462 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1463 runtime->oss.period_bytes, 0);
1464 if (tmp <= 0)
1465 goto err;
1466 runtime->oss.bytes += tmp;
1467 buf += tmp;
1468 bytes -= tmp;
1469 xfer += tmp;
1470 }
1471 }
1472 mutex_unlock(&runtime->oss.params_lock);
1473 return xfer;
1474
1475 err:
1476 mutex_unlock(&runtime->oss.params_lock);
1477 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1478 }
1479
1480 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1481 {
1482 struct snd_pcm_substream *substream;
1483
1484 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1485 if (substream != NULL) {
1486 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1487 substream->runtime->oss.prepare = 1;
1488 }
1489 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1490 if (substream != NULL) {
1491 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1492 substream->runtime->oss.prepare = 1;
1493 }
1494 return 0;
1495 }
1496
1497 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1498 {
1499 struct snd_pcm_substream *substream;
1500 int err;
1501
1502 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1503 if (substream != NULL) {
1504 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1505 return err;
1506 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1507 }
1508 /* note: all errors from the start action are ignored */
1509 /* OSS apps do not know, how to handle them */
1510 return 0;
1511 }
1512
1513 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1514 {
1515 struct snd_pcm_runtime *runtime;
1516 ssize_t result = 0;
1517 long res;
1518 wait_queue_t wait;
1519
1520 runtime = substream->runtime;
1521 init_waitqueue_entry(&wait, current);
1522 add_wait_queue(&runtime->sleep, &wait);
1523 #ifdef OSS_DEBUG
1524 printk("sync1: size = %li\n", size);
1525 #endif
1526 while (1) {
1527 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1528 if (result > 0) {
1529 runtime->oss.buffer_used = 0;
1530 result = 0;
1531 break;
1532 }
1533 if (result != 0 && result != -EAGAIN)
1534 break;
1535 result = 0;
1536 set_current_state(TASK_INTERRUPTIBLE);
1537 snd_pcm_stream_lock_irq(substream);
1538 res = runtime->status->state;
1539 snd_pcm_stream_unlock_irq(substream);
1540 if (res != SNDRV_PCM_STATE_RUNNING) {
1541 set_current_state(TASK_RUNNING);
1542 break;
1543 }
1544 res = schedule_timeout(10 * HZ);
1545 if (signal_pending(current)) {
1546 result = -ERESTARTSYS;
1547 break;
1548 }
1549 if (res == 0) {
1550 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1551 result = -EIO;
1552 break;
1553 }
1554 }
1555 remove_wait_queue(&runtime->sleep, &wait);
1556 return result;
1557 }
1558
1559 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1560 {
1561 int err = 0;
1562 unsigned int saved_f_flags;
1563 struct snd_pcm_substream *substream;
1564 struct snd_pcm_runtime *runtime;
1565 snd_pcm_format_t format;
1566 unsigned long width;
1567 size_t size;
1568
1569 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1570 if (substream != NULL) {
1571 runtime = substream->runtime;
1572 if (atomic_read(&substream->mmap_count))
1573 goto __direct;
1574 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1575 return err;
1576 format = snd_pcm_oss_format_from(runtime->oss.format);
1577 width = snd_pcm_format_physical_width(format);
1578 mutex_lock(&runtime->oss.params_lock);
1579 if (runtime->oss.buffer_used > 0) {
1580 #ifdef OSS_DEBUG
1581 printk("sync: buffer_used\n");
1582 #endif
1583 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1584 snd_pcm_format_set_silence(format,
1585 runtime->oss.buffer + runtime->oss.buffer_used,
1586 size);
1587 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1588 if (err < 0) {
1589 mutex_unlock(&runtime->oss.params_lock);
1590 return err;
1591 }
1592 } else if (runtime->oss.period_ptr > 0) {
1593 #ifdef OSS_DEBUG
1594 printk("sync: period_ptr\n");
1595 #endif
1596 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1597 snd_pcm_format_set_silence(format,
1598 runtime->oss.buffer,
1599 size * 8 / width);
1600 err = snd_pcm_oss_sync1(substream, size);
1601 if (err < 0) {
1602 mutex_unlock(&runtime->oss.params_lock);
1603 return err;
1604 }
1605 }
1606 /*
1607 * The ALSA's period might be a bit large than OSS one.
1608 * Fill the remain portion of ALSA period with zeros.
1609 */
1610 size = runtime->control->appl_ptr % runtime->period_size;
1611 if (size > 0) {
1612 size = runtime->period_size - size;
1613 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1614 size = (runtime->frame_bits * size) / 8;
1615 while (size > 0) {
1616 mm_segment_t fs;
1617 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1618 size -= size1;
1619 size1 *= 8;
1620 size1 /= runtime->sample_bits;
1621 snd_pcm_format_set_silence(runtime->format,
1622 runtime->oss.buffer,
1623 size1);
1624 size1 /= runtime->channels; /* frames */
1625 fs = snd_enter_user();
1626 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1627 snd_leave_user(fs);
1628 }
1629 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1630 void __user *buffers[runtime->channels];
1631 memset(buffers, 0, runtime->channels * sizeof(void *));
1632 snd_pcm_lib_writev(substream, buffers, size);
1633 }
1634 }
1635 mutex_unlock(&runtime->oss.params_lock);
1636 /*
1637 * finish sync: drain the buffer
1638 */
1639 __direct:
1640 saved_f_flags = substream->f_flags;
1641 substream->f_flags &= ~O_NONBLOCK;
1642 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1643 substream->f_flags = saved_f_flags;
1644 if (err < 0)
1645 return err;
1646 runtime->oss.prepare = 1;
1647 }
1648
1649 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1650 if (substream != NULL) {
1651 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1652 return err;
1653 runtime = substream->runtime;
1654 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1655 if (err < 0)
1656 return err;
1657 runtime->oss.buffer_used = 0;
1658 runtime->oss.prepare = 1;
1659 }
1660 return 0;
1661 }
1662
1663 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1664 {
1665 int idx;
1666
1667 for (idx = 1; idx >= 0; --idx) {
1668 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1669 struct snd_pcm_runtime *runtime;
1670 if (substream == NULL)
1671 continue;
1672 runtime = substream->runtime;
1673 if (rate < 1000)
1674 rate = 1000;
1675 else if (rate > 192000)
1676 rate = 192000;
1677 if (runtime->oss.rate != rate) {
1678 runtime->oss.params = 1;
1679 runtime->oss.rate = rate;
1680 }
1681 }
1682 return snd_pcm_oss_get_rate(pcm_oss_file);
1683 }
1684
1685 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1686 {
1687 struct snd_pcm_substream *substream;
1688 int err;
1689
1690 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1691 return err;
1692 return substream->runtime->oss.rate;
1693 }
1694
1695 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1696 {
1697 int idx;
1698 if (channels < 1)
1699 channels = 1;
1700 if (channels > 128)
1701 return -EINVAL;
1702 for (idx = 1; idx >= 0; --idx) {
1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704 struct snd_pcm_runtime *runtime;
1705 if (substream == NULL)
1706 continue;
1707 runtime = substream->runtime;
1708 if (runtime->oss.channels != channels) {
1709 runtime->oss.params = 1;
1710 runtime->oss.channels = channels;
1711 }
1712 }
1713 return snd_pcm_oss_get_channels(pcm_oss_file);
1714 }
1715
1716 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1717 {
1718 struct snd_pcm_substream *substream;
1719 int err;
1720
1721 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1722 return err;
1723 return substream->runtime->oss.channels;
1724 }
1725
1726 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1727 {
1728 struct snd_pcm_substream *substream;
1729 int err;
1730
1731 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1732 return err;
1733 return substream->runtime->oss.period_bytes;
1734 }
1735
1736 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1737 {
1738 struct snd_pcm_substream *substream;
1739 int err;
1740 int direct;
1741 struct snd_pcm_hw_params *params;
1742 unsigned int formats = 0;
1743 struct snd_mask format_mask;
1744 int fmt;
1745
1746 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1747 return err;
1748 if (atomic_read(&substream->mmap_count))
1749 direct = 1;
1750 else
1751 direct = substream->oss.setup.direct;
1752 if (!direct)
1753 return AFMT_MU_LAW | AFMT_U8 |
1754 AFMT_S16_LE | AFMT_S16_BE |
1755 AFMT_S8 | AFMT_U16_LE |
1756 AFMT_U16_BE |
1757 AFMT_S32_LE | AFMT_S32_BE |
1758 AFMT_S24_LE | AFMT_S24_LE |
1759 AFMT_S24_PACKED;
1760 params = kmalloc(sizeof(*params), GFP_KERNEL);
1761 if (!params)
1762 return -ENOMEM;
1763 _snd_pcm_hw_params_any(params);
1764 err = snd_pcm_hw_refine(substream, params);
1765 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1766 kfree(params);
1767 snd_assert(err >= 0, return err);
1768 for (fmt = 0; fmt < 32; ++fmt) {
1769 if (snd_mask_test(&format_mask, fmt)) {
1770 int f = snd_pcm_oss_format_to(fmt);
1771 if (f >= 0)
1772 formats |= f;
1773 }
1774 }
1775 return formats;
1776 }
1777
1778 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1779 {
1780 int formats, idx;
1781
1782 if (format != AFMT_QUERY) {
1783 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1784 if (formats < 0)
1785 return formats;
1786 if (!(formats & format))
1787 format = AFMT_U8;
1788 for (idx = 1; idx >= 0; --idx) {
1789 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1790 struct snd_pcm_runtime *runtime;
1791 if (substream == NULL)
1792 continue;
1793 runtime = substream->runtime;
1794 if (runtime->oss.format != format) {
1795 runtime->oss.params = 1;
1796 runtime->oss.format = format;
1797 }
1798 }
1799 }
1800 return snd_pcm_oss_get_format(pcm_oss_file);
1801 }
1802
1803 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1804 {
1805 struct snd_pcm_substream *substream;
1806 int err;
1807
1808 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1809 return err;
1810 return substream->runtime->oss.format;
1811 }
1812
1813 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1814 {
1815 struct snd_pcm_runtime *runtime;
1816
1817 if (substream == NULL)
1818 return 0;
1819 runtime = substream->runtime;
1820 if (subdivide == 0) {
1821 subdivide = runtime->oss.subdivision;
1822 if (subdivide == 0)
1823 subdivide = 1;
1824 return subdivide;
1825 }
1826 if (runtime->oss.subdivision || runtime->oss.fragshift)
1827 return -EINVAL;
1828 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1829 subdivide != 8 && subdivide != 16)
1830 return -EINVAL;
1831 runtime->oss.subdivision = subdivide;
1832 runtime->oss.params = 1;
1833 return subdivide;
1834 }
1835
1836 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1837 {
1838 int err = -EINVAL, idx;
1839
1840 for (idx = 1; idx >= 0; --idx) {
1841 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1842 if (substream == NULL)
1843 continue;
1844 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1845 return err;
1846 }
1847 return err;
1848 }
1849
1850 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1851 {
1852 struct snd_pcm_runtime *runtime;
1853
1854 if (substream == NULL)
1855 return 0;
1856 runtime = substream->runtime;
1857 if (runtime->oss.subdivision || runtime->oss.fragshift)
1858 return -EINVAL;
1859 runtime->oss.fragshift = val & 0xffff;
1860 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1861 if (runtime->oss.fragshift < 4) /* < 16 */
1862 runtime->oss.fragshift = 4;
1863 if (runtime->oss.maxfrags < 2)
1864 runtime->oss.maxfrags = 2;
1865 runtime->oss.params = 1;
1866 return 0;
1867 }
1868
1869 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1870 {
1871 int err = -EINVAL, idx;
1872
1873 for (idx = 1; idx >= 0; --idx) {
1874 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1875 if (substream == NULL)
1876 continue;
1877 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1878 return err;
1879 }
1880 return err;
1881 }
1882
1883 static int snd_pcm_oss_nonblock(struct file * file)
1884 {
1885 file->f_flags |= O_NONBLOCK;
1886 return 0;
1887 }
1888
1889 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1890 {
1891
1892 if (substream == NULL) {
1893 res &= ~DSP_CAP_DUPLEX;
1894 return res;
1895 }
1896 #ifdef DSP_CAP_MULTI
1897 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1898 if (substream->pstr->substream_count > 1)
1899 res |= DSP_CAP_MULTI;
1900 #endif
1901 /* DSP_CAP_REALTIME is set all times: */
1902 /* all ALSA drivers can return actual pointer in ring buffer */
1903 #if defined(DSP_CAP_REALTIME) && 0
1904 {
1905 struct snd_pcm_runtime *runtime = substream->runtime;
1906 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1907 res &= ~DSP_CAP_REALTIME;
1908 }
1909 #endif
1910 return res;
1911 }
1912
1913 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1914 {
1915 int result, idx;
1916
1917 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1918 for (idx = 0; idx < 2; idx++) {
1919 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1920 result = snd_pcm_oss_get_caps1(substream, result);
1921 }
1922 result |= 0x0001; /* revision - same as SB AWE 64 */
1923 return result;
1924 }
1925
1926 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1927 {
1928 struct snd_pcm_runtime *runtime = substream->runtime;
1929 snd_pcm_uframes_t appl_ptr;
1930 appl_ptr = hw_ptr + runtime->buffer_size;
1931 appl_ptr %= runtime->boundary;
1932 runtime->control->appl_ptr = appl_ptr;
1933 }
1934
1935 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1936 {
1937 struct snd_pcm_runtime *runtime;
1938 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1939 int err, cmd;
1940
1941 #ifdef OSS_DEBUG
1942 printk("pcm_oss: trigger = 0x%x\n", trigger);
1943 #endif
1944
1945 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1946 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1947
1948 if (psubstream) {
1949 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1950 return err;
1951 }
1952 if (csubstream) {
1953 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1954 return err;
1955 }
1956 if (psubstream) {
1957 runtime = psubstream->runtime;
1958 if (trigger & PCM_ENABLE_OUTPUT) {
1959 if (runtime->oss.trigger)
1960 goto _skip1;
1961 if (atomic_read(&psubstream->mmap_count))
1962 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1963 runtime->oss.trigger = 1;
1964 runtime->start_threshold = 1;
1965 cmd = SNDRV_PCM_IOCTL_START;
1966 } else {
1967 if (!runtime->oss.trigger)
1968 goto _skip1;
1969 runtime->oss.trigger = 0;
1970 runtime->start_threshold = runtime->boundary;
1971 cmd = SNDRV_PCM_IOCTL_DROP;
1972 runtime->oss.prepare = 1;
1973 }
1974 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1975 if (err < 0)
1976 return err;
1977 }
1978 _skip1:
1979 if (csubstream) {
1980 runtime = csubstream->runtime;
1981 if (trigger & PCM_ENABLE_INPUT) {
1982 if (runtime->oss.trigger)
1983 goto _skip2;
1984 runtime->oss.trigger = 1;
1985 runtime->start_threshold = 1;
1986 cmd = SNDRV_PCM_IOCTL_START;
1987 } else {
1988 if (!runtime->oss.trigger)
1989 goto _skip2;
1990 runtime->oss.trigger = 0;
1991 runtime->start_threshold = runtime->boundary;
1992 cmd = SNDRV_PCM_IOCTL_DROP;
1993 runtime->oss.prepare = 1;
1994 }
1995 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1996 if (err < 0)
1997 return err;
1998 }
1999 _skip2:
2000 return 0;
2001 }
2002
2003 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2004 {
2005 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2006 int result = 0;
2007
2008 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2009 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2010 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2011 result |= PCM_ENABLE_OUTPUT;
2012 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2013 result |= PCM_ENABLE_INPUT;
2014 return result;
2015 }
2016
2017 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2018 {
2019 struct snd_pcm_substream *substream;
2020 struct snd_pcm_runtime *runtime;
2021 snd_pcm_sframes_t delay;
2022 int err;
2023
2024 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2025 if (substream == NULL)
2026 return -EINVAL;
2027 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2028 return err;
2029 runtime = substream->runtime;
2030 if (runtime->oss.params || runtime->oss.prepare)
2031 return 0;
2032 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2033 if (err == -EPIPE)
2034 delay = 0; /* hack for broken OSS applications */
2035 else if (err < 0)
2036 return err;
2037 return snd_pcm_oss_bytes(substream, delay);
2038 }
2039
2040 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2041 {
2042 struct snd_pcm_substream *substream;
2043 struct snd_pcm_runtime *runtime;
2044 snd_pcm_sframes_t delay;
2045 int fixup;
2046 struct count_info info;
2047 int err;
2048
2049 if (_info == NULL)
2050 return -EFAULT;
2051 substream = pcm_oss_file->streams[stream];
2052 if (substream == NULL)
2053 return -EINVAL;
2054 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2055 return err;
2056 runtime = substream->runtime;
2057 if (runtime->oss.params || runtime->oss.prepare) {
2058 memset(&info, 0, sizeof(info));
2059 if (copy_to_user(_info, &info, sizeof(info)))
2060 return -EFAULT;
2061 return 0;
2062 }
2063 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2064 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2065 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2066 err = 0;
2067 delay = 0;
2068 fixup = 0;
2069 } else {
2070 fixup = runtime->oss.buffer_used;
2071 }
2072 } else {
2073 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2074 fixup = -runtime->oss.buffer_used;
2075 }
2076 if (err < 0)
2077 return err;
2078 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2079 if (atomic_read(&substream->mmap_count)) {
2080 snd_pcm_sframes_t n;
2081 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2082 if (n < 0)
2083 n += runtime->boundary;
2084 info.blocks = n / runtime->period_size;
2085 runtime->oss.prev_hw_ptr_interrupt = delay;
2086 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2087 snd_pcm_oss_simulate_fill(substream, delay);
2088 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2089 } else {
2090 delay = snd_pcm_oss_bytes(substream, delay);
2091 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2092 if (substream->oss.setup.buggyptr)
2093 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2094 else
2095 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2096 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2097 } else {
2098 delay += fixup;
2099 info.blocks = delay / runtime->oss.period_bytes;
2100 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2101 }
2102 }
2103 if (copy_to_user(_info, &info, sizeof(info)))
2104 return -EFAULT;
2105 return 0;
2106 }
2107
2108 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2109 {
2110 struct snd_pcm_substream *substream;
2111 struct snd_pcm_runtime *runtime;
2112 snd_pcm_sframes_t avail;
2113 int fixup;
2114 struct audio_buf_info info;
2115 int err;
2116
2117 if (_info == NULL)
2118 return -EFAULT;
2119 substream = pcm_oss_file->streams[stream];
2120 if (substream == NULL)
2121 return -EINVAL;
2122 runtime = substream->runtime;
2123
2124 if (runtime->oss.params &&
2125 (err = snd_pcm_oss_change_params(substream)) < 0)
2126 return err;
2127
2128 info.fragsize = runtime->oss.period_bytes;
2129 info.fragstotal = runtime->periods;
2130 if (runtime->oss.prepare) {
2131 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2132 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2133 info.fragments = runtime->oss.periods;
2134 } else {
2135 info.bytes = 0;
2136 info.fragments = 0;
2137 }
2138 } else {
2139 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2140 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2141 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2142 avail = runtime->buffer_size;
2143 err = 0;
2144 fixup = 0;
2145 } else {
2146 avail = runtime->buffer_size - avail;
2147 fixup = -runtime->oss.buffer_used;
2148 }
2149 } else {
2150 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2151 fixup = runtime->oss.buffer_used;
2152 }
2153 if (err < 0)
2154 return err;
2155 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2156 info.fragments = info.bytes / runtime->oss.period_bytes;
2157 }
2158
2159 #ifdef OSS_DEBUG
2160 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2161 #endif
2162 if (copy_to_user(_info, &info, sizeof(info)))
2163 return -EFAULT;
2164 return 0;
2165 }
2166
2167 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2168 {
2169 // it won't be probably implemented
2170 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2171 return -EINVAL;
2172 }
2173
2174 static const char *strip_task_path(const char *path)
2175 {
2176 const char *ptr, *ptrl = NULL;
2177 for (ptr = path; *ptr; ptr++) {
2178 if (*ptr == '/')
2179 ptrl = ptr + 1;
2180 }
2181 return ptrl;
2182 }
2183
2184 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2185 const char *task_name,
2186 struct snd_pcm_oss_setup *rsetup)
2187 {
2188 struct snd_pcm_oss_setup *setup;
2189
2190 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2191 do {
2192 for (setup = pcm->streams[stream].oss.setup_list; setup;
2193 setup = setup->next) {
2194 if (!strcmp(setup->task_name, task_name))
2195 goto out;
2196 }
2197 } while ((task_name = strip_task_path(task_name)) != NULL);
2198 out:
2199 if (setup)
2200 *rsetup = *setup;
2201 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2202 }
2203
2204 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2205 {
2206 struct snd_pcm_runtime *runtime;
2207 runtime = substream->runtime;
2208 vfree(runtime->oss.buffer);
2209 runtime->oss.buffer = NULL;
2210 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2211 snd_pcm_oss_plugin_clear(substream);
2212 #endif
2213 substream->oss.oss = 0;
2214 }
2215
2216 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2217 struct snd_pcm_oss_setup *setup,
2218 int minor)
2219 {
2220 struct snd_pcm_runtime *runtime;
2221
2222 substream->oss.oss = 1;
2223 substream->oss.setup = *setup;
2224 if (setup->nonblock)
2225 substream->f_flags |= O_NONBLOCK;
2226 else if (setup->block)
2227 substream->f_flags &= ~O_NONBLOCK;
2228 runtime = substream->runtime;
2229 runtime->oss.params = 1;
2230 runtime->oss.trigger = 1;
2231 runtime->oss.rate = 8000;
2232 mutex_init(&runtime->oss.params_lock);
2233 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2234 case SNDRV_MINOR_OSS_PCM_8:
2235 runtime->oss.format = AFMT_U8;
2236 break;
2237 case SNDRV_MINOR_OSS_PCM_16:
2238 runtime->oss.format = AFMT_S16_LE;
2239 break;
2240 default:
2241 runtime->oss.format = AFMT_MU_LAW;
2242 }
2243 runtime->oss.channels = 1;
2244 runtime->oss.fragshift = 0;
2245 runtime->oss.maxfrags = 0;
2246 runtime->oss.subdivision = 0;
2247 substream->pcm_release = snd_pcm_oss_release_substream;
2248 }
2249
2250 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2251 {
2252 int cidx;
2253 snd_assert(pcm_oss_file != NULL, return -ENXIO);
2254 for (cidx = 0; cidx < 2; ++cidx) {
2255 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2256 if (substream)
2257 snd_pcm_release_substream(substream);
2258 }
2259 kfree(pcm_oss_file);
2260 return 0;
2261 }
2262
2263 static int snd_pcm_oss_open_file(struct file *file,
2264 struct snd_pcm *pcm,
2265 struct snd_pcm_oss_file **rpcm_oss_file,
2266 int minor,
2267 struct snd_pcm_oss_setup *setup)
2268 {
2269 int idx, err;
2270 struct snd_pcm_oss_file *pcm_oss_file;
2271 struct snd_pcm_substream *substream;
2272 unsigned int f_mode = file->f_mode;
2273
2274 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2275 *rpcm_oss_file = NULL;
2276
2277 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2278 if (pcm_oss_file == NULL)
2279 return -ENOMEM;
2280
2281 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2282 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2283 f_mode = FMODE_WRITE;
2284
2285 file->f_flags &= ~O_APPEND;
2286 for (idx = 0; idx < 2; idx++) {
2287 if (setup[idx].disable)
2288 continue;
2289 if (! pcm->streams[idx].substream_count)
2290 continue; /* no matching substream */
2291 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2292 if (! (f_mode & FMODE_WRITE))
2293 continue;
2294 } else {
2295 if (! (f_mode & FMODE_READ))
2296 continue;
2297 }
2298 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2299 if (err < 0) {
2300 snd_pcm_oss_release_file(pcm_oss_file);
2301 return err;
2302 }
2303
2304 pcm_oss_file->streams[idx] = substream;
2305 substream->file = pcm_oss_file;
2306 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2307 }
2308
2309 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2310 snd_pcm_oss_release_file(pcm_oss_file);
2311 return -EINVAL;
2312 }
2313
2314 file->private_data = pcm_oss_file;
2315 *rpcm_oss_file = pcm_oss_file;
2316 return 0;
2317 }
2318
2319
2320 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2321 {
2322 unsigned int idx;
2323
2324 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2325 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2326 name[idx] = task->comm[idx];
2327 name[idx] = '\0';
2328 return 0;
2329 }
2330
2331 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2332 {
2333 int err;
2334 char task_name[32];
2335 struct snd_pcm *pcm;
2336 struct snd_pcm_oss_file *pcm_oss_file;
2337 struct snd_pcm_oss_setup setup[2];
2338 int nonblock;
2339 wait_queue_t wait;
2340
2341 pcm = snd_lookup_oss_minor_data(iminor(inode),
2342 SNDRV_OSS_DEVICE_TYPE_PCM);
2343 if (pcm == NULL) {
2344 err = -ENODEV;
2345 goto __error1;
2346 }
2347 err = snd_card_file_add(pcm->card, file);
2348 if (err < 0)
2349 goto __error1;
2350 if (!try_module_get(pcm->card->module)) {
2351 err = -EFAULT;
2352 goto __error2;
2353 }
2354 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2355 err = -EFAULT;
2356 goto __error;
2357 }
2358 memset(setup, 0, sizeof(setup));
2359 if (file->f_mode & FMODE_WRITE)
2360 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2361 task_name, &setup[0]);
2362 if (file->f_mode & FMODE_READ)
2363 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2364 task_name, &setup[1]);
2365
2366 nonblock = !!(file->f_flags & O_NONBLOCK);
2367 if (!nonblock)
2368 nonblock = nonblock_open;
2369
2370 init_waitqueue_entry(&wait, current);
2371 add_wait_queue(&pcm->open_wait, &wait);
2372 mutex_lock(&pcm->open_mutex);
2373 while (1) {
2374 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2375 iminor(inode), setup);
2376 if (err >= 0)
2377 break;
2378 if (err == -EAGAIN) {
2379 if (nonblock) {
2380 err = -EBUSY;
2381 break;
2382 }
2383 } else
2384 break;
2385 set_current_state(TASK_INTERRUPTIBLE);
2386 mutex_unlock(&pcm->open_mutex);
2387 schedule();
2388 mutex_lock(&pcm->open_mutex);
2389 if (signal_pending(current)) {
2390 err = -ERESTARTSYS;
2391 break;
2392 }
2393 }
2394 remove_wait_queue(&pcm->open_wait, &wait);
2395 mutex_unlock(&pcm->open_mutex);
2396 if (err < 0)
2397 goto __error;
2398 return err;
2399
2400 __error:
2401 module_put(pcm->card->module);
2402 __error2:
2403 snd_card_file_remove(pcm->card, file);
2404 __error1:
2405 return err;
2406 }
2407
2408 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2409 {
2410 struct snd_pcm *pcm;
2411 struct snd_pcm_substream *substream;
2412 struct snd_pcm_oss_file *pcm_oss_file;
2413
2414 pcm_oss_file = file->private_data;
2415 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2416 if (substream == NULL)
2417 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2418 snd_assert(substream != NULL, return -ENXIO);
2419 pcm = substream->pcm;
2420 if (!pcm->card->shutdown)
2421 snd_pcm_oss_sync(pcm_oss_file);
2422 mutex_lock(&pcm->open_mutex);
2423 snd_pcm_oss_release_file(pcm_oss_file);
2424 mutex_unlock(&pcm->open_mutex);
2425 wake_up(&pcm->open_wait);
2426 module_put(pcm->card->module);
2427 snd_card_file_remove(pcm->card, file);
2428 return 0;
2429 }
2430
2431 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2432 {
2433 struct snd_pcm_oss_file *pcm_oss_file;
2434 int __user *p = (int __user *)arg;
2435 int res;
2436
2437 pcm_oss_file = file->private_data;
2438 if (cmd == OSS_GETVERSION)
2439 return put_user(SNDRV_OSS_VERSION, p);
2440 if (cmd == OSS_ALSAEMULVER)
2441 return put_user(1, p);
2442 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2443 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2444 struct snd_pcm_substream *substream;
2445 int idx;
2446 for (idx = 0; idx < 2; ++idx) {
2447 substream = pcm_oss_file->streams[idx];
2448 if (substream != NULL)
2449 break;
2450 }
2451 snd_assert(substream != NULL, return -ENXIO);
2452 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2453 }
2454 #endif
2455 if (((cmd >> 8) & 0xff) != 'P')
2456 return -EINVAL;
2457 #ifdef OSS_DEBUG
2458 printk("pcm_oss: ioctl = 0x%x\n", cmd);
2459 #endif
2460 switch (cmd) {
2461 case SNDCTL_DSP_RESET:
2462 return snd_pcm_oss_reset(pcm_oss_file);
2463 case SNDCTL_DSP_SYNC:
2464 return snd_pcm_oss_sync(pcm_oss_file);
2465 case SNDCTL_DSP_SPEED:
2466 if (get_user(res, p))
2467 return -EFAULT;
2468 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2469 return res;
2470 return put_user(res, p);
2471 case SOUND_PCM_READ_RATE:
2472 res = snd_pcm_oss_get_rate(pcm_oss_file);
2473 if (res < 0)
2474 return res;
2475 return put_user(res, p);
2476 case SNDCTL_DSP_STEREO:
2477 if (get_user(res, p))
2478 return -EFAULT;
2479 res = res > 0 ? 2 : 1;
2480 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2481 return res;
2482 return put_user(--res, p);
2483 case SNDCTL_DSP_GETBLKSIZE:
2484 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2485 if (res < 0)
2486 return res;
2487 return put_user(res, p);
2488 case SNDCTL_DSP_SETFMT:
2489 if (get_user(res, p))
2490 return -EFAULT;
2491 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2492 if (res < 0)
2493 return res;
2494 return put_user(res, p);
2495 case SOUND_PCM_READ_BITS:
2496 res = snd_pcm_oss_get_format(pcm_oss_file);
2497 if (res < 0)
2498 return res;
2499 return put_user(res, p);
2500 case SNDCTL_DSP_CHANNELS:
2501 if (get_user(res, p))
2502 return -EFAULT;
2503 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2504 if (res < 0)
2505 return res;
2506 return put_user(res, p);
2507 case SOUND_PCM_READ_CHANNELS:
2508 res = snd_pcm_oss_get_channels(pcm_oss_file);
2509 if (res < 0)
2510 return res;
2511 return put_user(res, p);
2512 case SOUND_PCM_WRITE_FILTER:
2513 case SOUND_PCM_READ_FILTER:
2514 return -EIO;
2515 case SNDCTL_DSP_POST:
2516 return snd_pcm_oss_post(pcm_oss_file);
2517 case SNDCTL_DSP_SUBDIVIDE:
2518 if (get_user(res, p))
2519 return -EFAULT;
2520 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2521 if (res < 0)
2522 return res;
2523 return put_user(res, p);
2524 case SNDCTL_DSP_SETFRAGMENT:
2525 if (get_user(res, p))
2526 return -EFAULT;
2527 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2528 case SNDCTL_DSP_GETFMTS:
2529 res = snd_pcm_oss_get_formats(pcm_oss_file);
2530 if (res < 0)
2531 return res;
2532 return put_user(res, p);
2533 case SNDCTL_DSP_GETOSPACE:
2534 case SNDCTL_DSP_GETISPACE:
2535 return snd_pcm_oss_get_space(pcm_oss_file,
2536 cmd == SNDCTL_DSP_GETISPACE ?
2537 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2538 (struct audio_buf_info __user *) arg);
2539 case SNDCTL_DSP_NONBLOCK:
2540 return snd_pcm_oss_nonblock(file);
2541 case SNDCTL_DSP_GETCAPS:
2542 res = snd_pcm_oss_get_caps(pcm_oss_file);
2543 if (res < 0)
2544 return res;
2545 return put_user(res, p);
2546 case SNDCTL_DSP_GETTRIGGER:
2547 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2548 if (res < 0)
2549 return res;
2550 return put_user(res, p);
2551 case SNDCTL_DSP_SETTRIGGER:
2552 if (get_user(res, p))
2553 return -EFAULT;
2554 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2555 case SNDCTL_DSP_GETIPTR:
2556 case SNDCTL_DSP_GETOPTR:
2557 return snd_pcm_oss_get_ptr(pcm_oss_file,
2558 cmd == SNDCTL_DSP_GETIPTR ?
2559 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2560 (struct count_info __user *) arg);
2561 case SNDCTL_DSP_MAPINBUF:
2562 case SNDCTL_DSP_MAPOUTBUF:
2563 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2564 cmd == SNDCTL_DSP_MAPINBUF ?
2565 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2566 (struct buffmem_desc __user *) arg);
2567 case SNDCTL_DSP_SETSYNCRO:
2568 /* stop DMA now.. */
2569 return 0;
2570 case SNDCTL_DSP_SETDUPLEX:
2571 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2572 return 0;
2573 return -EIO;
2574 case SNDCTL_DSP_GETODELAY:
2575 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2576 if (res < 0) {
2577 /* it's for sure, some broken apps don't check for error codes */
2578 put_user(0, p);
2579 return res;
2580 }
2581 return put_user(res, p);
2582 case SNDCTL_DSP_PROFILE:
2583 return 0; /* silently ignore */
2584 default:
2585 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2586 }
2587 return -EINVAL;
2588 }
2589
2590 #ifdef CONFIG_COMPAT
2591 /* all compatible */
2592 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2593 #else
2594 #define snd_pcm_oss_ioctl_compat NULL
2595 #endif
2596
2597 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2598 {
2599 struct snd_pcm_oss_file *pcm_oss_file;
2600 struct snd_pcm_substream *substream;
2601
2602 pcm_oss_file = file->private_data;
2603 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2604 if (substream == NULL)
2605 return -ENXIO;
2606 substream->f_flags = file->f_flags & O_NONBLOCK;
2607 #ifndef OSS_DEBUG
2608 return snd_pcm_oss_read1(substream, buf, count);
2609 #else
2610 {
2611 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2612 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2613 return res;
2614 }
2615 #endif
2616 }
2617
2618 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2619 {
2620 struct snd_pcm_oss_file *pcm_oss_file;
2621 struct snd_pcm_substream *substream;
2622 long result;
2623
2624 pcm_oss_file = file->private_data;
2625 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2626 if (substream == NULL)
2627 return -ENXIO;
2628 substream->f_flags = file->f_flags & O_NONBLOCK;
2629 result = snd_pcm_oss_write1(substream, buf, count);
2630 #ifdef OSS_DEBUG
2631 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2632 #endif
2633 return result;
2634 }
2635
2636 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2637 {
2638 struct snd_pcm_runtime *runtime = substream->runtime;
2639 if (atomic_read(&substream->mmap_count))
2640 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2641 else
2642 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2643 }
2644
2645 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2646 {
2647 struct snd_pcm_runtime *runtime = substream->runtime;
2648 if (atomic_read(&substream->mmap_count))
2649 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2650 else
2651 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2652 }
2653
2654 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2655 {
2656 struct snd_pcm_oss_file *pcm_oss_file;
2657 unsigned int mask;
2658 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2659
2660 pcm_oss_file = file->private_data;
2661
2662 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2663 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2664
2665 mask = 0;
2666 if (psubstream != NULL) {
2667 struct snd_pcm_runtime *runtime = psubstream->runtime;
2668 poll_wait(file, &runtime->sleep, wait);
2669 snd_pcm_stream_lock_irq(psubstream);
2670 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2671 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2672 snd_pcm_oss_playback_ready(psubstream)))
2673 mask |= POLLOUT | POLLWRNORM;
2674 snd_pcm_stream_unlock_irq(psubstream);
2675 }
2676 if (csubstream != NULL) {
2677 struct snd_pcm_runtime *runtime = csubstream->runtime;
2678 snd_pcm_state_t ostate;
2679 poll_wait(file, &runtime->sleep, wait);
2680 snd_pcm_stream_lock_irq(csubstream);
2681 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2682 snd_pcm_oss_capture_ready(csubstream))
2683 mask |= POLLIN | POLLRDNORM;
2684 snd_pcm_stream_unlock_irq(csubstream);
2685 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2686 struct snd_pcm_oss_file ofile;
2687 memset(&ofile, 0, sizeof(ofile));
2688 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2689 runtime->oss.trigger = 0;
2690 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2691 }
2692 }
2693
2694 return mask;
2695 }
2696
2697 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2698 {
2699 struct snd_pcm_oss_file *pcm_oss_file;
2700 struct snd_pcm_substream *substream = NULL;
2701 struct snd_pcm_runtime *runtime;
2702 int err;
2703
2704 #ifdef OSS_DEBUG
2705 printk("pcm_oss: mmap begin\n");
2706 #endif
2707 pcm_oss_file = file->private_data;
2708 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2709 case VM_READ | VM_WRITE:
2710 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2711 if (substream)
2712 break;
2713 /* Fall through */
2714 case VM_READ:
2715 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2716 break;
2717 case VM_WRITE:
2718 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2719 break;
2720 default:
2721 return -EINVAL;
2722 }
2723 /* set VM_READ access as well to fix memset() routines that do
2724 reads before writes (to improve performance) */
2725 area->vm_flags |= VM_READ;
2726 if (substream == NULL)
2727 return -ENXIO;
2728 runtime = substream->runtime;
2729 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2730 return -EIO;
2731 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2732 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2733 else
2734 return -EIO;
2735
2736 if (runtime->oss.params) {
2737 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2738 return err;
2739 }
2740 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2741 if (runtime->oss.plugin_first != NULL)
2742 return -EIO;
2743 #endif
2744
2745 if (area->vm_pgoff != 0)
2746 return -EINVAL;
2747
2748 err = snd_pcm_mmap_data(substream, file, area);
2749 if (err < 0)
2750 return err;
2751 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2752 runtime->silence_threshold = 0;
2753 runtime->silence_size = 0;
2754 #ifdef OSS_DEBUG
2755 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2756 #endif
2757 /* In mmap mode we never stop */
2758 runtime->stop_threshold = runtime->boundary;
2759
2760 return 0;
2761 }
2762
2763 #ifdef CONFIG_SND_VERBOSE_PROCFS
2764 /*
2765 * /proc interface
2766 */
2767
2768 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2769 struct snd_info_buffer *buffer)
2770 {
2771 struct snd_pcm_str *pstr = entry->private_data;
2772 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2773 mutex_lock(&pstr->oss.setup_mutex);
2774 while (setup) {
2775 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2776 setup->task_name,
2777 setup->periods,
2778 setup->period_size,
2779 setup->disable ? " disable" : "",
2780 setup->direct ? " direct" : "",
2781 setup->block ? " block" : "",
2782 setup->nonblock ? " non-block" : "",
2783 setup->partialfrag ? " partial-frag" : "",
2784 setup->nosilence ? " no-silence" : "");
2785 setup = setup->next;
2786 }
2787 mutex_unlock(&pstr->oss.setup_mutex);
2788 }
2789
2790 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2791 {
2792 struct snd_pcm_oss_setup *setup, *setupn;
2793
2794 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2795 setup; setup = setupn) {
2796 setupn = setup->next;
2797 kfree(setup->task_name);
2798 kfree(setup);
2799 }
2800 pstr->oss.setup_list = NULL;
2801 }
2802
2803 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2804 struct snd_info_buffer *buffer)
2805 {
2806 struct snd_pcm_str *pstr = entry->private_data;
2807 char line[128], str[32], task_name[32], *ptr;
2808 int idx1;
2809 struct snd_pcm_oss_setup *setup, *setup1, template;
2810
2811 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2812 mutex_lock(&pstr->oss.setup_mutex);
2813 memset(&template, 0, sizeof(template));
2814 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2815 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2816 snd_pcm_oss_proc_free_setup_list(pstr);
2817 mutex_unlock(&pstr->oss.setup_mutex);
2818 continue;
2819 }
2820 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2821 if (!strcmp(setup->task_name, task_name)) {
2822 template = *setup;
2823 break;
2824 }
2825 }
2826 ptr = snd_info_get_str(str, ptr, sizeof(str));
2827 template.periods = simple_strtoul(str, NULL, 10);
2828 ptr = snd_info_get_str(str, ptr, sizeof(str));
2829 template.period_size = simple_strtoul(str, NULL, 10);
2830 for (idx1 = 31; idx1 >= 0; idx1--)
2831 if (template.period_size & (1 << idx1))
2832 break;
2833 for (idx1--; idx1 >= 0; idx1--)
2834 template.period_size &= ~(1 << idx1);
2835 do {
2836 ptr = snd_info_get_str(str, ptr, sizeof(str));
2837 if (!strcmp(str, "disable")) {
2838 template.disable = 1;
2839 } else if (!strcmp(str, "direct")) {
2840 template.direct = 1;
2841 } else if (!strcmp(str, "block")) {
2842 template.block = 1;
2843 } else if (!strcmp(str, "non-block")) {
2844 template.nonblock = 1;
2845 } else if (!strcmp(str, "partial-frag")) {
2846 template.partialfrag = 1;
2847 } else if (!strcmp(str, "no-silence")) {
2848 template.nosilence = 1;
2849 } else if (!strcmp(str, "buggy-ptr")) {
2850 template.buggyptr = 1;
2851 }
2852 } while (*str);
2853 if (setup == NULL) {
2854 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2855 if (! setup) {
2856 buffer->error = -ENOMEM;
2857 mutex_unlock(&pstr->oss.setup_mutex);
2858 return;
2859 }
2860 if (pstr->oss.setup_list == NULL)
2861 pstr->oss.setup_list = setup;
2862 else {
2863 for (setup1 = pstr->oss.setup_list;
2864 setup1->next; setup1 = setup1->next);
2865 setup1->next = setup;
2866 }
2867 template.task_name = kstrdup(task_name, GFP_KERNEL);
2868 if (! template.task_name) {
2869 kfree(setup);
2870 buffer->error = -ENOMEM;
2871 mutex_unlock(&pstr->oss.setup_mutex);
2872 return;
2873 }
2874 }
2875 *setup = template;
2876 mutex_unlock(&pstr->oss.setup_mutex);
2877 }
2878 }
2879
2880 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2881 {
2882 int stream;
2883 for (stream = 0; stream < 2; ++stream) {
2884 struct snd_info_entry *entry;
2885 struct snd_pcm_str *pstr = &pcm->streams[stream];
2886 if (pstr->substream_count == 0)
2887 continue;
2888 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2889 entry->content = SNDRV_INFO_CONTENT_TEXT;
2890 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2891 entry->c.text.read = snd_pcm_oss_proc_read;
2892 entry->c.text.write = snd_pcm_oss_proc_write;
2893 entry->private_data = pstr;
2894 if (snd_info_register(entry) < 0) {
2895 snd_info_free_entry(entry);
2896 entry = NULL;
2897 }
2898 }
2899 pstr->oss.proc_entry = entry;
2900 }
2901 }
2902
2903 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2904 {
2905 int stream;
2906 for (stream = 0; stream < 2; ++stream) {
2907 struct snd_pcm_str *pstr = &pcm->streams[stream];
2908 snd_info_free_entry(pstr->oss.proc_entry);
2909 pstr->oss.proc_entry = NULL;
2910 snd_pcm_oss_proc_free_setup_list(pstr);
2911 }
2912 }
2913 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2914 #define snd_pcm_oss_proc_init(pcm)
2915 #define snd_pcm_oss_proc_done(pcm)
2916 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2917
2918 /*
2919 * ENTRY functions
2920 */
2921
2922 static const struct file_operations snd_pcm_oss_f_reg =
2923 {
2924 .owner = THIS_MODULE,
2925 .read = snd_pcm_oss_read,
2926 .write = snd_pcm_oss_write,
2927 .open = snd_pcm_oss_open,
2928 .release = snd_pcm_oss_release,
2929 .poll = snd_pcm_oss_poll,
2930 .unlocked_ioctl = snd_pcm_oss_ioctl,
2931 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2932 .mmap = snd_pcm_oss_mmap,
2933 };
2934
2935 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2936 {
2937 char name[128];
2938 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2939 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2940 pcm->card, index, &snd_pcm_oss_f_reg,
2941 pcm, name) < 0) {
2942 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2943 pcm->card->number, pcm->device);
2944 }
2945 }
2946
2947 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2948 {
2949 pcm->oss.reg = 0;
2950 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2951 char name[128];
2952 int duplex;
2953 register_oss_dsp(pcm, 0);
2954 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2955 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2956 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2957 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2958 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2959 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2960 pcm->card->number,
2961 name);
2962 #endif
2963 pcm->oss.reg++;
2964 pcm->oss.reg_mask |= 1;
2965 }
2966 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2967 register_oss_dsp(pcm, 1);
2968 pcm->oss.reg++;
2969 pcm->oss.reg_mask |= 2;
2970 }
2971
2972 if (pcm->oss.reg)
2973 snd_pcm_oss_proc_init(pcm);
2974
2975 return 0;
2976 }
2977
2978 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2979 {
2980 if (pcm->oss.reg) {
2981 if (pcm->oss.reg_mask & 1) {
2982 pcm->oss.reg_mask &= ~1;
2983 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2984 pcm->card, 0);
2985 }
2986 if (pcm->oss.reg_mask & 2) {
2987 pcm->oss.reg_mask &= ~2;
2988 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2989 pcm->card, 1);
2990 }
2991 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2992 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2993 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2994 #endif
2995 }
2996 pcm->oss.reg = 0;
2997 }
2998 return 0;
2999 }
3000
3001 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3002 {
3003 snd_pcm_oss_disconnect_minor(pcm);
3004 snd_pcm_oss_proc_done(pcm);
3005 return 0;
3006 }
3007
3008 static struct snd_pcm_notify snd_pcm_oss_notify =
3009 {
3010 .n_register = snd_pcm_oss_register_minor,
3011 .n_disconnect = snd_pcm_oss_disconnect_minor,
3012 .n_unregister = snd_pcm_oss_unregister_minor,
3013 };
3014
3015 static int __init alsa_pcm_oss_init(void)
3016 {
3017 int i;
3018 int err;
3019
3020 /* check device map table */
3021 for (i = 0; i < SNDRV_CARDS; i++) {
3022 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3023 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3024 i, dsp_map[i]);
3025 dsp_map[i] = 0;
3026 }
3027 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3028 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3029 i, adsp_map[i]);
3030 adsp_map[i] = 1;
3031 }
3032 }
3033 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3034 return err;
3035 return 0;
3036 }
3037
3038 static void __exit alsa_pcm_oss_exit(void)
3039 {
3040 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3041 }
3042
3043 module_init(alsa_pcm_oss_init)
3044 module_exit(alsa_pcm_oss_exit)
Linux with added FPC-III support