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ALSA: Kill snd_assert() in sound/core/*
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / oss / pcm_oss.c
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/moduleparam.h>
34 #include <linux/string.h>
35 #include <sound/core.h>
36 #include <sound/minors.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include "pcm_plugin.h"
40 #include <sound/info.h>
41 #include <linux/soundcard.h>
42 #include <sound/initval.h>
43
44 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
45
46 static int dsp_map[SNDRV_CARDS];
47 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
48 static int nonblock_open = 1;
49
50 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
51 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
52 MODULE_LICENSE("GPL");
53 module_param_array(dsp_map, int, NULL, 0444);
54 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
55 module_param_array(adsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
57 module_param(nonblock_open, bool, 0644);
58 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
59 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
61
62 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
63 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
64 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
66
67 static inline mm_segment_t snd_enter_user(void)
68 {
69 mm_segment_t fs = get_fs();
70 set_fs(get_ds());
71 return fs;
72 }
73
74 static inline void snd_leave_user(mm_segment_t fs)
75 {
76 set_fs(fs);
77 }
78
79 /*
80 * helper functions to process hw_params
81 */
82 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
83 {
84 int changed = 0;
85 if (i->min < min) {
86 i->min = min;
87 i->openmin = openmin;
88 changed = 1;
89 } else if (i->min == min && !i->openmin && openmin) {
90 i->openmin = 1;
91 changed = 1;
92 }
93 if (i->integer) {
94 if (i->openmin) {
95 i->min++;
96 i->openmin = 0;
97 }
98 }
99 if (snd_interval_checkempty(i)) {
100 snd_interval_none(i);
101 return -EINVAL;
102 }
103 return changed;
104 }
105
106 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
107 {
108 int changed = 0;
109 if (i->max > max) {
110 i->max = max;
111 i->openmax = openmax;
112 changed = 1;
113 } else if (i->max == max && !i->openmax && openmax) {
114 i->openmax = 1;
115 changed = 1;
116 }
117 if (i->integer) {
118 if (i->openmax) {
119 i->max--;
120 i->openmax = 0;
121 }
122 }
123 if (snd_interval_checkempty(i)) {
124 snd_interval_none(i);
125 return -EINVAL;
126 }
127 return changed;
128 }
129
130 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
131 {
132 struct snd_interval t;
133 t.empty = 0;
134 t.min = t.max = val;
135 t.openmin = t.openmax = 0;
136 t.integer = 1;
137 return snd_interval_refine(i, &t);
138 }
139
140 /**
141 * snd_pcm_hw_param_value_min
142 * @params: the hw_params instance
143 * @var: parameter to retrieve
144 * @dir: pointer to the direction (-1,0,1) or NULL
145 *
146 * Return the minimum value for field PAR.
147 */
148 static unsigned int
149 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
150 snd_pcm_hw_param_t var, int *dir)
151 {
152 if (hw_is_mask(var)) {
153 if (dir)
154 *dir = 0;
155 return snd_mask_min(hw_param_mask_c(params, var));
156 }
157 if (hw_is_interval(var)) {
158 const struct snd_interval *i = hw_param_interval_c(params, var);
159 if (dir)
160 *dir = i->openmin;
161 return snd_interval_min(i);
162 }
163 return -EINVAL;
164 }
165
166 /**
167 * snd_pcm_hw_param_value_max
168 * @params: the hw_params instance
169 * @var: parameter to retrieve
170 * @dir: pointer to the direction (-1,0,1) or NULL
171 *
172 * Return the maximum value for field PAR.
173 */
174 static unsigned int
175 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
176 snd_pcm_hw_param_t var, int *dir)
177 {
178 if (hw_is_mask(var)) {
179 if (dir)
180 *dir = 0;
181 return snd_mask_max(hw_param_mask_c(params, var));
182 }
183 if (hw_is_interval(var)) {
184 const struct snd_interval *i = hw_param_interval_c(params, var);
185 if (dir)
186 *dir = - (int) i->openmax;
187 return snd_interval_max(i);
188 }
189 return -EINVAL;
190 }
191
192 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
193 snd_pcm_hw_param_t var,
194 const struct snd_mask *val)
195 {
196 int changed;
197 changed = snd_mask_refine(hw_param_mask(params, var), val);
198 if (changed) {
199 params->cmask |= 1 << var;
200 params->rmask |= 1 << var;
201 }
202 return changed;
203 }
204
205 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
206 struct snd_pcm_hw_params *params,
207 snd_pcm_hw_param_t var,
208 const struct snd_mask *val)
209 {
210 int changed = _snd_pcm_hw_param_mask(params, var, val);
211 if (changed < 0)
212 return changed;
213 if (params->rmask) {
214 int err = snd_pcm_hw_refine(pcm, params);
215 if (err < 0)
216 return err;
217 }
218 return 0;
219 }
220
221 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
222 snd_pcm_hw_param_t var, unsigned int val,
223 int dir)
224 {
225 int changed;
226 int open = 0;
227 if (dir) {
228 if (dir > 0) {
229 open = 1;
230 } else if (dir < 0) {
231 if (val > 0) {
232 open = 1;
233 val--;
234 }
235 }
236 }
237 if (hw_is_mask(var))
238 changed = snd_mask_refine_min(hw_param_mask(params, var),
239 val + !!open);
240 else if (hw_is_interval(var))
241 changed = snd_interval_refine_min(hw_param_interval(params, var),
242 val, open);
243 else
244 return -EINVAL;
245 if (changed) {
246 params->cmask |= 1 << var;
247 params->rmask |= 1 << var;
248 }
249 return changed;
250 }
251
252 /**
253 * snd_pcm_hw_param_min
254 * @pcm: PCM instance
255 * @params: the hw_params instance
256 * @var: parameter to retrieve
257 * @val: minimal value
258 * @dir: pointer to the direction (-1,0,1) or NULL
259 *
260 * Inside configuration space defined by PARAMS remove from PAR all
261 * values < VAL. Reduce configuration space accordingly.
262 * Return new minimum or -EINVAL if the configuration space is empty
263 */
264 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
265 struct snd_pcm_hw_params *params,
266 snd_pcm_hw_param_t var, unsigned int val,
267 int *dir)
268 {
269 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
270 if (changed < 0)
271 return changed;
272 if (params->rmask) {
273 int err = snd_pcm_hw_refine(pcm, params);
274 if (err < 0)
275 return err;
276 }
277 return snd_pcm_hw_param_value_min(params, var, dir);
278 }
279
280 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
281 snd_pcm_hw_param_t var, unsigned int val,
282 int dir)
283 {
284 int changed;
285 int open = 0;
286 if (dir) {
287 if (dir < 0) {
288 open = 1;
289 } else if (dir > 0) {
290 open = 1;
291 val++;
292 }
293 }
294 if (hw_is_mask(var)) {
295 if (val == 0 && open) {
296 snd_mask_none(hw_param_mask(params, var));
297 changed = -EINVAL;
298 } else
299 changed = snd_mask_refine_max(hw_param_mask(params, var),
300 val - !!open);
301 } else if (hw_is_interval(var))
302 changed = snd_interval_refine_max(hw_param_interval(params, var),
303 val, open);
304 else
305 return -EINVAL;
306 if (changed) {
307 params->cmask |= 1 << var;
308 params->rmask |= 1 << var;
309 }
310 return changed;
311 }
312
313 /**
314 * snd_pcm_hw_param_max
315 * @pcm: PCM instance
316 * @params: the hw_params instance
317 * @var: parameter to retrieve
318 * @val: maximal value
319 * @dir: pointer to the direction (-1,0,1) or NULL
320 *
321 * Inside configuration space defined by PARAMS remove from PAR all
322 * values >= VAL + 1. Reduce configuration space accordingly.
323 * Return new maximum or -EINVAL if the configuration space is empty
324 */
325 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
326 struct snd_pcm_hw_params *params,
327 snd_pcm_hw_param_t var, unsigned int val,
328 int *dir)
329 {
330 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
331 if (changed < 0)
332 return changed;
333 if (params->rmask) {
334 int err = snd_pcm_hw_refine(pcm, params);
335 if (err < 0)
336 return err;
337 }
338 return snd_pcm_hw_param_value_max(params, var, dir);
339 }
340
341 static int boundary_sub(int a, int adir,
342 int b, int bdir,
343 int *c, int *cdir)
344 {
345 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
346 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
347 *c = a - b;
348 *cdir = adir - bdir;
349 if (*cdir == -2) {
350 (*c)--;
351 } else if (*cdir == 2) {
352 (*c)++;
353 }
354 return 0;
355 }
356
357 static int boundary_lt(unsigned int a, int adir,
358 unsigned int b, int bdir)
359 {
360 if (adir < 0) {
361 a--;
362 adir = 1;
363 } else if (adir > 0)
364 adir = 1;
365 if (bdir < 0) {
366 b--;
367 bdir = 1;
368 } else if (bdir > 0)
369 bdir = 1;
370 return a < b || (a == b && adir < bdir);
371 }
372
373 /* Return 1 if min is nearer to best than max */
374 static int boundary_nearer(int min, int mindir,
375 int best, int bestdir,
376 int max, int maxdir)
377 {
378 int dmin, dmindir;
379 int dmax, dmaxdir;
380 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
381 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
382 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
383 }
384
385 /**
386 * snd_pcm_hw_param_near
387 * @pcm: PCM instance
388 * @params: the hw_params instance
389 * @var: parameter to retrieve
390 * @best: value to set
391 * @dir: pointer to the direction (-1,0,1) or NULL
392 *
393 * Inside configuration space defined by PARAMS set PAR to the available value
394 * nearest to VAL. Reduce configuration space accordingly.
395 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
396 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
397 * Return the value found.
398 */
399 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
400 struct snd_pcm_hw_params *params,
401 snd_pcm_hw_param_t var, unsigned int best,
402 int *dir)
403 {
404 struct snd_pcm_hw_params *save = NULL;
405 int v;
406 unsigned int saved_min;
407 int last = 0;
408 int min, max;
409 int mindir, maxdir;
410 int valdir = dir ? *dir : 0;
411 /* FIXME */
412 if (best > INT_MAX)
413 best = INT_MAX;
414 min = max = best;
415 mindir = maxdir = valdir;
416 if (maxdir > 0)
417 maxdir = 0;
418 else if (maxdir == 0)
419 maxdir = -1;
420 else {
421 maxdir = 1;
422 max--;
423 }
424 save = kmalloc(sizeof(*save), GFP_KERNEL);
425 if (save == NULL)
426 return -ENOMEM;
427 *save = *params;
428 saved_min = min;
429 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
430 if (min >= 0) {
431 struct snd_pcm_hw_params *params1;
432 if (max < 0)
433 goto _end;
434 if ((unsigned int)min == saved_min && mindir == valdir)
435 goto _end;
436 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
437 if (params1 == NULL) {
438 kfree(save);
439 return -ENOMEM;
440 }
441 *params1 = *save;
442 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
443 if (max < 0) {
444 kfree(params1);
445 goto _end;
446 }
447 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
448 *params = *params1;
449 last = 1;
450 }
451 kfree(params1);
452 } else {
453 *params = *save;
454 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
455 if (max < 0)
456 return max;
457 last = 1;
458 }
459 _end:
460 kfree(save);
461 if (last)
462 v = snd_pcm_hw_param_last(pcm, params, var, dir);
463 else
464 v = snd_pcm_hw_param_first(pcm, params, var, dir);
465 snd_BUG_ON(v < 0);
466 return v;
467 }
468
469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
470 snd_pcm_hw_param_t var, unsigned int val,
471 int dir)
472 {
473 int changed;
474 if (hw_is_mask(var)) {
475 struct snd_mask *m = hw_param_mask(params, var);
476 if (val == 0 && dir < 0) {
477 changed = -EINVAL;
478 snd_mask_none(m);
479 } else {
480 if (dir > 0)
481 val++;
482 else if (dir < 0)
483 val--;
484 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
485 }
486 } else if (hw_is_interval(var)) {
487 struct snd_interval *i = hw_param_interval(params, var);
488 if (val == 0 && dir < 0) {
489 changed = -EINVAL;
490 snd_interval_none(i);
491 } else if (dir == 0)
492 changed = snd_interval_refine_set(i, val);
493 else {
494 struct snd_interval t;
495 t.openmin = 1;
496 t.openmax = 1;
497 t.empty = 0;
498 t.integer = 0;
499 if (dir < 0) {
500 t.min = val - 1;
501 t.max = val;
502 } else {
503 t.min = val;
504 t.max = val+1;
505 }
506 changed = snd_interval_refine(i, &t);
507 }
508 } else
509 return -EINVAL;
510 if (changed) {
511 params->cmask |= 1 << var;
512 params->rmask |= 1 << var;
513 }
514 return changed;
515 }
516
517 /**
518 * snd_pcm_hw_param_set
519 * @pcm: PCM instance
520 * @params: the hw_params instance
521 * @var: parameter to retrieve
522 * @val: value to set
523 * @dir: pointer to the direction (-1,0,1) or NULL
524 *
525 * Inside configuration space defined by PARAMS remove from PAR all
526 * values != VAL. Reduce configuration space accordingly.
527 * Return VAL or -EINVAL if the configuration space is empty
528 */
529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
530 struct snd_pcm_hw_params *params,
531 snd_pcm_hw_param_t var, unsigned int val,
532 int dir)
533 {
534 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
535 if (changed < 0)
536 return changed;
537 if (params->rmask) {
538 int err = snd_pcm_hw_refine(pcm, params);
539 if (err < 0)
540 return err;
541 }
542 return snd_pcm_hw_param_value(params, var, NULL);
543 }
544
545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
546 snd_pcm_hw_param_t var)
547 {
548 int changed;
549 changed = snd_interval_setinteger(hw_param_interval(params, var));
550 if (changed) {
551 params->cmask |= 1 << var;
552 params->rmask |= 1 << var;
553 }
554 return changed;
555 }
556
557 /*
558 * plugin
559 */
560
561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
563 {
564 struct snd_pcm_runtime *runtime = substream->runtime;
565 struct snd_pcm_plugin *plugin, *next;
566
567 plugin = runtime->oss.plugin_first;
568 while (plugin) {
569 next = plugin->next;
570 snd_pcm_plugin_free(plugin);
571 plugin = next;
572 }
573 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
574 return 0;
575 }
576
577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
578 {
579 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
580 plugin->next = runtime->oss.plugin_first;
581 plugin->prev = NULL;
582 if (runtime->oss.plugin_first) {
583 runtime->oss.plugin_first->prev = plugin;
584 runtime->oss.plugin_first = plugin;
585 } else {
586 runtime->oss.plugin_last =
587 runtime->oss.plugin_first = plugin;
588 }
589 return 0;
590 }
591
592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
593 {
594 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
595 plugin->next = NULL;
596 plugin->prev = runtime->oss.plugin_last;
597 if (runtime->oss.plugin_last) {
598 runtime->oss.plugin_last->next = plugin;
599 runtime->oss.plugin_last = plugin;
600 } else {
601 runtime->oss.plugin_last =
602 runtime->oss.plugin_first = plugin;
603 }
604 return 0;
605 }
606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
607
608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
609 {
610 struct snd_pcm_runtime *runtime = substream->runtime;
611 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
612 long bytes = frames_to_bytes(runtime, frames);
613 if (buffer_size == runtime->oss.buffer_bytes)
614 return bytes;
615 #if BITS_PER_LONG >= 64
616 return runtime->oss.buffer_bytes * bytes / buffer_size;
617 #else
618 {
619 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
620 u32 rem;
621 div64_32(&bsize, buffer_size, &rem);
622 return (long)bsize;
623 }
624 #endif
625 }
626
627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
628 {
629 struct snd_pcm_runtime *runtime = substream->runtime;
630 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
631 if (buffer_size == runtime->oss.buffer_bytes)
632 return bytes_to_frames(runtime, bytes);
633 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
634 }
635
636 /* define extended formats in the recent OSS versions (if any) */
637 /* linear formats */
638 #define AFMT_S32_LE 0x00001000
639 #define AFMT_S32_BE 0x00002000
640 #define AFMT_S24_LE 0x00008000
641 #define AFMT_S24_BE 0x00010000
642 #define AFMT_S24_PACKED 0x00040000
643
644 /* other supported formats */
645 #define AFMT_FLOAT 0x00004000
646 #define AFMT_SPDIF_RAW 0x00020000
647
648 /* unsupported formats */
649 #define AFMT_AC3 0x00000400
650 #define AFMT_VORBIS 0x00000800
651
652 static int snd_pcm_oss_format_from(int format)
653 {
654 switch (format) {
655 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
656 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
657 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
658 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
659 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
660 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
661 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
662 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
663 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
664 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
665 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
666 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
667 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
668 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
669 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
670 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
671 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
672 default: return SNDRV_PCM_FORMAT_U8;
673 }
674 }
675
676 static int snd_pcm_oss_format_to(int format)
677 {
678 switch (format) {
679 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
680 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
681 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
682 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
683 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
684 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
685 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
686 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
687 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
688 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
689 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
690 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
691 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
692 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
693 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
694 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
695 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
696 default: return -EINVAL;
697 }
698 }
699
700 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
701 struct snd_pcm_hw_params *oss_params,
702 struct snd_pcm_hw_params *slave_params)
703 {
704 size_t s;
705 size_t oss_buffer_size, oss_period_size, oss_periods;
706 size_t min_period_size, max_period_size;
707 struct snd_pcm_runtime *runtime = substream->runtime;
708 size_t oss_frame_size;
709
710 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
711 params_channels(oss_params) / 8;
712
713 oss_buffer_size = snd_pcm_plug_client_size(substream,
714 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
715 oss_buffer_size = 1 << ld2(oss_buffer_size);
716 if (atomic_read(&substream->mmap_count)) {
717 if (oss_buffer_size > runtime->oss.mmap_bytes)
718 oss_buffer_size = runtime->oss.mmap_bytes;
719 }
720
721 if (substream->oss.setup.period_size > 16)
722 oss_period_size = substream->oss.setup.period_size;
723 else if (runtime->oss.fragshift) {
724 oss_period_size = 1 << runtime->oss.fragshift;
725 if (oss_period_size > oss_buffer_size / 2)
726 oss_period_size = oss_buffer_size / 2;
727 } else {
728 int sd;
729 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
730
731 oss_period_size = oss_buffer_size;
732 do {
733 oss_period_size /= 2;
734 } while (oss_period_size > bytes_per_sec);
735 if (runtime->oss.subdivision == 0) {
736 sd = 4;
737 if (oss_period_size / sd > 4096)
738 sd *= 2;
739 if (oss_period_size / sd < 4096)
740 sd = 1;
741 } else
742 sd = runtime->oss.subdivision;
743 oss_period_size /= sd;
744 if (oss_period_size < 16)
745 oss_period_size = 16;
746 }
747
748 min_period_size = snd_pcm_plug_client_size(substream,
749 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
750 min_period_size *= oss_frame_size;
751 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
752 if (oss_period_size < min_period_size)
753 oss_period_size = min_period_size;
754
755 max_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 max_period_size *= oss_frame_size;
758 max_period_size = 1 << ld2(max_period_size);
759 if (oss_period_size > max_period_size)
760 oss_period_size = max_period_size;
761
762 oss_periods = oss_buffer_size / oss_period_size;
763
764 if (substream->oss.setup.periods > 1)
765 oss_periods = substream->oss.setup.periods;
766
767 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
768 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
769 s = runtime->oss.maxfrags;
770 if (oss_periods > s)
771 oss_periods = s;
772
773 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
774 if (s < 2)
775 s = 2;
776 if (oss_periods < s)
777 oss_periods = s;
778
779 while (oss_period_size * oss_periods > oss_buffer_size)
780 oss_period_size /= 2;
781
782 if (oss_period_size < 16)
783 return -EINVAL;
784 runtime->oss.period_bytes = oss_period_size;
785 runtime->oss.period_frames = 1;
786 runtime->oss.periods = oss_periods;
787 return 0;
788 }
789
790 static int choose_rate(struct snd_pcm_substream *substream,
791 struct snd_pcm_hw_params *params, unsigned int best_rate)
792 {
793 struct snd_interval *it;
794 struct snd_pcm_hw_params *save;
795 unsigned int rate, prev;
796
797 save = kmalloc(sizeof(*save), GFP_KERNEL);
798 if (save == NULL)
799 return -ENOMEM;
800 *save = *params;
801 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
802
803 /* try multiples of the best rate */
804 rate = best_rate;
805 for (;;) {
806 if (it->max < rate || (it->max == rate && it->openmax))
807 break;
808 if (it->min < rate || (it->min == rate && !it->openmin)) {
809 int ret;
810 ret = snd_pcm_hw_param_set(substream, params,
811 SNDRV_PCM_HW_PARAM_RATE,
812 rate, 0);
813 if (ret == (int)rate) {
814 kfree(save);
815 return rate;
816 }
817 *params = *save;
818 }
819 prev = rate;
820 rate += best_rate;
821 if (rate <= prev)
822 break;
823 }
824
825 /* not found, use the nearest rate */
826 kfree(save);
827 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
828 }
829
830 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
831 {
832 struct snd_pcm_runtime *runtime = substream->runtime;
833 struct snd_pcm_hw_params *params, *sparams;
834 struct snd_pcm_sw_params *sw_params;
835 ssize_t oss_buffer_size, oss_period_size;
836 size_t oss_frame_size;
837 int err;
838 int direct;
839 int format, sformat, n;
840 struct snd_mask sformat_mask;
841 struct snd_mask mask;
842
843 if (mutex_lock_interruptible(&runtime->oss.params_lock))
844 return -EINTR;
845 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
846 params = kmalloc(sizeof(*params), GFP_KERNEL);
847 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
848 if (!sw_params || !params || !sparams) {
849 snd_printd("No memory\n");
850 err = -ENOMEM;
851 goto failure;
852 }
853
854 if (atomic_read(&substream->mmap_count))
855 direct = 1;
856 else
857 direct = substream->oss.setup.direct;
858
859 _snd_pcm_hw_params_any(sparams);
860 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
861 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
862 snd_mask_none(&mask);
863 if (atomic_read(&substream->mmap_count))
864 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
865 else {
866 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
867 if (!direct)
868 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
869 }
870 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
871 if (err < 0) {
872 snd_printd("No usable accesses\n");
873 err = -EINVAL;
874 goto failure;
875 }
876 choose_rate(substream, sparams, runtime->oss.rate);
877 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
878
879 format = snd_pcm_oss_format_from(runtime->oss.format);
880
881 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
882 if (direct)
883 sformat = format;
884 else
885 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
886
887 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
888 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
889 if (snd_mask_test(&sformat_mask, sformat) &&
890 snd_pcm_oss_format_to(sformat) >= 0)
891 break;
892 }
893 if (sformat > SNDRV_PCM_FORMAT_LAST) {
894 snd_printd("Cannot find a format!!!\n");
895 err = -EINVAL;
896 goto failure;
897 }
898 }
899 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
900 if (err < 0)
901 goto failure;
902
903 if (direct) {
904 memcpy(params, sparams, sizeof(*params));
905 } else {
906 _snd_pcm_hw_params_any(params);
907 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
908 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
910 snd_pcm_oss_format_from(runtime->oss.format), 0);
911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
912 runtime->oss.channels, 0);
913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
914 runtime->oss.rate, 0);
915 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
916 params_access(params), params_format(params),
917 params_channels(params), params_rate(params));
918 }
919 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
920 params_access(sparams), params_format(sparams),
921 params_channels(sparams), params_rate(sparams));
922
923 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
924 params_channels(params) / 8;
925
926 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
927 snd_pcm_oss_plugin_clear(substream);
928 if (!direct) {
929 /* add necessary plugins */
930 snd_pcm_oss_plugin_clear(substream);
931 if ((err = snd_pcm_plug_format_plugins(substream,
932 params,
933 sparams)) < 0) {
934 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
935 snd_pcm_oss_plugin_clear(substream);
936 goto failure;
937 }
938 if (runtime->oss.plugin_first) {
939 struct snd_pcm_plugin *plugin;
940 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
941 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
942 snd_pcm_oss_plugin_clear(substream);
943 goto failure;
944 }
945 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
946 err = snd_pcm_plugin_append(plugin);
947 } else {
948 err = snd_pcm_plugin_insert(plugin);
949 }
950 if (err < 0) {
951 snd_pcm_oss_plugin_clear(substream);
952 goto failure;
953 }
954 }
955 }
956 #endif
957
958 err = snd_pcm_oss_period_size(substream, params, sparams);
959 if (err < 0)
960 goto failure;
961
962 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
963 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
964 if (err < 0)
965 goto failure;
966
967 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
968 runtime->oss.periods, NULL);
969 if (err < 0)
970 goto failure;
971
972 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
973
974 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
975 snd_printd("HW_PARAMS failed: %i\n", err);
976 goto failure;
977 }
978
979 memset(sw_params, 0, sizeof(*sw_params));
980 if (runtime->oss.trigger) {
981 sw_params->start_threshold = 1;
982 } else {
983 sw_params->start_threshold = runtime->boundary;
984 }
985 if (atomic_read(&substream->mmap_count) ||
986 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
987 sw_params->stop_threshold = runtime->boundary;
988 else
989 sw_params->stop_threshold = runtime->buffer_size;
990 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
991 sw_params->period_step = 1;
992 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
993 1 : runtime->period_size;
994 if (atomic_read(&substream->mmap_count) ||
995 substream->oss.setup.nosilence) {
996 sw_params->silence_threshold = 0;
997 sw_params->silence_size = 0;
998 } else {
999 snd_pcm_uframes_t frames;
1000 frames = runtime->period_size + 16;
1001 if (frames > runtime->buffer_size)
1002 frames = runtime->buffer_size;
1003 sw_params->silence_threshold = frames;
1004 sw_params->silence_size = frames;
1005 }
1006
1007 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1008 snd_printd("SW_PARAMS failed: %i\n", err);
1009 goto failure;
1010 }
1011
1012 runtime->oss.periods = params_periods(sparams);
1013 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1014 if (oss_period_size < 0) {
1015 err = -EINVAL;
1016 goto failure;
1017 }
1018 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1019 if (runtime->oss.plugin_first) {
1020 err = snd_pcm_plug_alloc(substream, oss_period_size);
1021 if (err < 0)
1022 goto failure;
1023 }
1024 #endif
1025 oss_period_size *= oss_frame_size;
1026
1027 oss_buffer_size = oss_period_size * runtime->oss.periods;
1028 if (oss_buffer_size < 0) {
1029 err = -EINVAL;
1030 goto failure;
1031 }
1032
1033 runtime->oss.period_bytes = oss_period_size;
1034 runtime->oss.buffer_bytes = oss_buffer_size;
1035
1036 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1037 runtime->oss.period_bytes,
1038 runtime->oss.buffer_bytes);
1039 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1040 params_period_size(sparams),
1041 params_buffer_size(sparams));
1042
1043 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1044 runtime->oss.channels = params_channels(params);
1045 runtime->oss.rate = params_rate(params);
1046
1047 runtime->oss.params = 0;
1048 runtime->oss.prepare = 1;
1049 vfree(runtime->oss.buffer);
1050 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1051 runtime->oss.buffer_used = 0;
1052 if (runtime->dma_area)
1053 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1054
1055 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1056
1057 err = 0;
1058 failure:
1059 kfree(sw_params);
1060 kfree(params);
1061 kfree(sparams);
1062 mutex_unlock(&runtime->oss.params_lock);
1063 return err;
1064 }
1065
1066 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1067 {
1068 int idx, err;
1069 struct snd_pcm_substream *asubstream = NULL, *substream;
1070
1071 for (idx = 0; idx < 2; idx++) {
1072 substream = pcm_oss_file->streams[idx];
1073 if (substream == NULL)
1074 continue;
1075 if (asubstream == NULL)
1076 asubstream = substream;
1077 if (substream->runtime->oss.params) {
1078 err = snd_pcm_oss_change_params(substream);
1079 if (err < 0)
1080 return err;
1081 }
1082 }
1083 if (!asubstream)
1084 return -EIO;
1085 if (r_substream)
1086 *r_substream = asubstream;
1087 return 0;
1088 }
1089
1090 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1091 {
1092 int err;
1093 struct snd_pcm_runtime *runtime = substream->runtime;
1094
1095 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1096 if (err < 0) {
1097 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1098 return err;
1099 }
1100 runtime->oss.prepare = 0;
1101 runtime->oss.prev_hw_ptr_interrupt = 0;
1102 runtime->oss.period_ptr = 0;
1103 runtime->oss.buffer_used = 0;
1104
1105 return 0;
1106 }
1107
1108 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1109 {
1110 struct snd_pcm_runtime *runtime;
1111 int err;
1112
1113 if (substream == NULL)
1114 return 0;
1115 runtime = substream->runtime;
1116 if (runtime->oss.params) {
1117 err = snd_pcm_oss_change_params(substream);
1118 if (err < 0)
1119 return err;
1120 }
1121 if (runtime->oss.prepare) {
1122 err = snd_pcm_oss_prepare(substream);
1123 if (err < 0)
1124 return err;
1125 }
1126 return 0;
1127 }
1128
1129 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1130 {
1131 struct snd_pcm_runtime *runtime;
1132 snd_pcm_uframes_t frames;
1133 int err = 0;
1134
1135 while (1) {
1136 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1137 if (err < 0)
1138 break;
1139 runtime = substream->runtime;
1140 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1141 break;
1142 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1143 /* until avail(delay) <= buffer_size */
1144 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1145 frames /= runtime->period_size;
1146 frames *= runtime->period_size;
1147 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1148 if (err < 0)
1149 break;
1150 }
1151 return err;
1152 }
1153
1154 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1155 {
1156 struct snd_pcm_runtime *runtime = substream->runtime;
1157 int ret;
1158 while (1) {
1159 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1160 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1161 #ifdef OSS_DEBUG
1162 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1163 printk("pcm_oss: write: recovering from XRUN\n");
1164 else
1165 printk("pcm_oss: write: recovering from SUSPEND\n");
1166 #endif
1167 ret = snd_pcm_oss_prepare(substream);
1168 if (ret < 0)
1169 break;
1170 }
1171 if (in_kernel) {
1172 mm_segment_t fs;
1173 fs = snd_enter_user();
1174 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1175 snd_leave_user(fs);
1176 } else {
1177 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1178 }
1179 if (ret != -EPIPE && ret != -ESTRPIPE)
1180 break;
1181 /* test, if we can't store new data, because the stream */
1182 /* has not been started */
1183 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1184 return -EAGAIN;
1185 }
1186 return ret;
1187 }
1188
1189 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1190 {
1191 struct snd_pcm_runtime *runtime = substream->runtime;
1192 snd_pcm_sframes_t delay;
1193 int ret;
1194 while (1) {
1195 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1196 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1197 #ifdef OSS_DEBUG
1198 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1199 printk("pcm_oss: read: recovering from XRUN\n");
1200 else
1201 printk("pcm_oss: read: recovering from SUSPEND\n");
1202 #endif
1203 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1204 if (ret < 0)
1205 break;
1206 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1207 ret = snd_pcm_oss_prepare(substream);
1208 if (ret < 0)
1209 break;
1210 }
1211 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1212 if (ret < 0)
1213 break;
1214 if (in_kernel) {
1215 mm_segment_t fs;
1216 fs = snd_enter_user();
1217 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1218 snd_leave_user(fs);
1219 } else {
1220 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1221 }
1222 if (ret == -EPIPE) {
1223 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1224 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1225 if (ret < 0)
1226 break;
1227 }
1228 continue;
1229 }
1230 if (ret != -ESTRPIPE)
1231 break;
1232 }
1233 return ret;
1234 }
1235
1236 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1237 {
1238 struct snd_pcm_runtime *runtime = substream->runtime;
1239 int ret;
1240 while (1) {
1241 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1242 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1243 #ifdef OSS_DEBUG
1244 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1245 printk("pcm_oss: writev: recovering from XRUN\n");
1246 else
1247 printk("pcm_oss: writev: recovering from SUSPEND\n");
1248 #endif
1249 ret = snd_pcm_oss_prepare(substream);
1250 if (ret < 0)
1251 break;
1252 }
1253 if (in_kernel) {
1254 mm_segment_t fs;
1255 fs = snd_enter_user();
1256 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1257 snd_leave_user(fs);
1258 } else {
1259 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1260 }
1261 if (ret != -EPIPE && ret != -ESTRPIPE)
1262 break;
1263
1264 /* test, if we can't store new data, because the stream */
1265 /* has not been started */
1266 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1267 return -EAGAIN;
1268 }
1269 return ret;
1270 }
1271
1272 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1273 {
1274 struct snd_pcm_runtime *runtime = substream->runtime;
1275 int ret;
1276 while (1) {
1277 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1278 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1279 #ifdef OSS_DEBUG
1280 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1281 printk("pcm_oss: readv: recovering from XRUN\n");
1282 else
1283 printk("pcm_oss: readv: recovering from SUSPEND\n");
1284 #endif
1285 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1286 if (ret < 0)
1287 break;
1288 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1289 ret = snd_pcm_oss_prepare(substream);
1290 if (ret < 0)
1291 break;
1292 }
1293 if (in_kernel) {
1294 mm_segment_t fs;
1295 fs = snd_enter_user();
1296 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1297 snd_leave_user(fs);
1298 } else {
1299 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1300 }
1301 if (ret != -EPIPE && ret != -ESTRPIPE)
1302 break;
1303 }
1304 return ret;
1305 }
1306
1307 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1308 {
1309 struct snd_pcm_runtime *runtime = substream->runtime;
1310 snd_pcm_sframes_t frames, frames1;
1311 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1312 if (runtime->oss.plugin_first) {
1313 struct snd_pcm_plugin_channel *channels;
1314 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1315 if (!in_kernel) {
1316 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1317 return -EFAULT;
1318 buf = runtime->oss.buffer;
1319 }
1320 frames = bytes / oss_frame_bytes;
1321 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1322 if (frames1 < 0)
1323 return frames1;
1324 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1325 if (frames1 <= 0)
1326 return frames1;
1327 bytes = frames1 * oss_frame_bytes;
1328 } else
1329 #endif
1330 {
1331 frames = bytes_to_frames(runtime, bytes);
1332 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1333 if (frames1 <= 0)
1334 return frames1;
1335 bytes = frames_to_bytes(runtime, frames1);
1336 }
1337 return bytes;
1338 }
1339
1340 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1341 {
1342 size_t xfer = 0;
1343 ssize_t tmp;
1344 struct snd_pcm_runtime *runtime = substream->runtime;
1345
1346 if (atomic_read(&substream->mmap_count))
1347 return -ENXIO;
1348
1349 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1350 return tmp;
1351 mutex_lock(&runtime->oss.params_lock);
1352 while (bytes > 0) {
1353 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1354 tmp = bytes;
1355 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1356 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1357 if (tmp > 0) {
1358 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1359 tmp = -EFAULT;
1360 goto err;
1361 }
1362 }
1363 runtime->oss.buffer_used += tmp;
1364 buf += tmp;
1365 bytes -= tmp;
1366 xfer += tmp;
1367 if (substream->oss.setup.partialfrag ||
1368 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1369 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1370 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1371 if (tmp <= 0)
1372 goto err;
1373 runtime->oss.bytes += tmp;
1374 runtime->oss.period_ptr += tmp;
1375 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1376 if (runtime->oss.period_ptr == 0 ||
1377 runtime->oss.period_ptr == runtime->oss.buffer_used)
1378 runtime->oss.buffer_used = 0;
1379 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1380 tmp = -EAGAIN;
1381 goto err;
1382 }
1383 }
1384 } else {
1385 tmp = snd_pcm_oss_write2(substream,
1386 (const char __force *)buf,
1387 runtime->oss.period_bytes, 0);
1388 if (tmp <= 0)
1389 goto err;
1390 runtime->oss.bytes += tmp;
1391 buf += tmp;
1392 bytes -= tmp;
1393 xfer += tmp;
1394 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1395 tmp != runtime->oss.period_bytes)
1396 break;
1397 }
1398 }
1399 mutex_unlock(&runtime->oss.params_lock);
1400 return xfer;
1401
1402 err:
1403 mutex_unlock(&runtime->oss.params_lock);
1404 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1405 }
1406
1407 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1408 {
1409 struct snd_pcm_runtime *runtime = substream->runtime;
1410 snd_pcm_sframes_t frames, frames1;
1411 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1412 char __user *final_dst = (char __user *)buf;
1413 if (runtime->oss.plugin_first) {
1414 struct snd_pcm_plugin_channel *channels;
1415 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1416 if (!in_kernel)
1417 buf = runtime->oss.buffer;
1418 frames = bytes / oss_frame_bytes;
1419 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1420 if (frames1 < 0)
1421 return frames1;
1422 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1423 if (frames1 <= 0)
1424 return frames1;
1425 bytes = frames1 * oss_frame_bytes;
1426 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1427 return -EFAULT;
1428 } else
1429 #endif
1430 {
1431 frames = bytes_to_frames(runtime, bytes);
1432 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1433 if (frames1 <= 0)
1434 return frames1;
1435 bytes = frames_to_bytes(runtime, frames1);
1436 }
1437 return bytes;
1438 }
1439
1440 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1441 {
1442 size_t xfer = 0;
1443 ssize_t tmp;
1444 struct snd_pcm_runtime *runtime = substream->runtime;
1445
1446 if (atomic_read(&substream->mmap_count))
1447 return -ENXIO;
1448
1449 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1450 return tmp;
1451 mutex_lock(&runtime->oss.params_lock);
1452 while (bytes > 0) {
1453 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1454 if (runtime->oss.buffer_used == 0) {
1455 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1456 if (tmp <= 0)
1457 goto err;
1458 runtime->oss.bytes += tmp;
1459 runtime->oss.period_ptr = tmp;
1460 runtime->oss.buffer_used = tmp;
1461 }
1462 tmp = bytes;
1463 if ((size_t) tmp > runtime->oss.buffer_used)
1464 tmp = runtime->oss.buffer_used;
1465 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1466 tmp = -EFAULT;
1467 goto err;
1468 }
1469 buf += tmp;
1470 bytes -= tmp;
1471 xfer += tmp;
1472 runtime->oss.buffer_used -= tmp;
1473 } else {
1474 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1475 runtime->oss.period_bytes, 0);
1476 if (tmp <= 0)
1477 goto err;
1478 runtime->oss.bytes += tmp;
1479 buf += tmp;
1480 bytes -= tmp;
1481 xfer += tmp;
1482 }
1483 }
1484 mutex_unlock(&runtime->oss.params_lock);
1485 return xfer;
1486
1487 err:
1488 mutex_unlock(&runtime->oss.params_lock);
1489 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1490 }
1491
1492 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1493 {
1494 struct snd_pcm_substream *substream;
1495
1496 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1497 if (substream != NULL) {
1498 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1499 substream->runtime->oss.prepare = 1;
1500 }
1501 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1502 if (substream != NULL) {
1503 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1504 substream->runtime->oss.prepare = 1;
1505 }
1506 return 0;
1507 }
1508
1509 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1510 {
1511 struct snd_pcm_substream *substream;
1512 int err;
1513
1514 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1515 if (substream != NULL) {
1516 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1517 return err;
1518 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1519 }
1520 /* note: all errors from the start action are ignored */
1521 /* OSS apps do not know, how to handle them */
1522 return 0;
1523 }
1524
1525 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1526 {
1527 struct snd_pcm_runtime *runtime;
1528 ssize_t result = 0;
1529 long res;
1530 wait_queue_t wait;
1531
1532 runtime = substream->runtime;
1533 init_waitqueue_entry(&wait, current);
1534 add_wait_queue(&runtime->sleep, &wait);
1535 #ifdef OSS_DEBUG
1536 printk("sync1: size = %li\n", size);
1537 #endif
1538 while (1) {
1539 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1540 if (result > 0) {
1541 runtime->oss.buffer_used = 0;
1542 result = 0;
1543 break;
1544 }
1545 if (result != 0 && result != -EAGAIN)
1546 break;
1547 result = 0;
1548 set_current_state(TASK_INTERRUPTIBLE);
1549 snd_pcm_stream_lock_irq(substream);
1550 res = runtime->status->state;
1551 snd_pcm_stream_unlock_irq(substream);
1552 if (res != SNDRV_PCM_STATE_RUNNING) {
1553 set_current_state(TASK_RUNNING);
1554 break;
1555 }
1556 res = schedule_timeout(10 * HZ);
1557 if (signal_pending(current)) {
1558 result = -ERESTARTSYS;
1559 break;
1560 }
1561 if (res == 0) {
1562 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1563 result = -EIO;
1564 break;
1565 }
1566 }
1567 remove_wait_queue(&runtime->sleep, &wait);
1568 return result;
1569 }
1570
1571 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1572 {
1573 int err = 0;
1574 unsigned int saved_f_flags;
1575 struct snd_pcm_substream *substream;
1576 struct snd_pcm_runtime *runtime;
1577 snd_pcm_format_t format;
1578 unsigned long width;
1579 size_t size;
1580
1581 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1582 if (substream != NULL) {
1583 runtime = substream->runtime;
1584 if (atomic_read(&substream->mmap_count))
1585 goto __direct;
1586 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1587 return err;
1588 format = snd_pcm_oss_format_from(runtime->oss.format);
1589 width = snd_pcm_format_physical_width(format);
1590 mutex_lock(&runtime->oss.params_lock);
1591 if (runtime->oss.buffer_used > 0) {
1592 #ifdef OSS_DEBUG
1593 printk("sync: buffer_used\n");
1594 #endif
1595 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1596 snd_pcm_format_set_silence(format,
1597 runtime->oss.buffer + runtime->oss.buffer_used,
1598 size);
1599 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1600 if (err < 0) {
1601 mutex_unlock(&runtime->oss.params_lock);
1602 return err;
1603 }
1604 } else if (runtime->oss.period_ptr > 0) {
1605 #ifdef OSS_DEBUG
1606 printk("sync: period_ptr\n");
1607 #endif
1608 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1609 snd_pcm_format_set_silence(format,
1610 runtime->oss.buffer,
1611 size * 8 / width);
1612 err = snd_pcm_oss_sync1(substream, size);
1613 if (err < 0) {
1614 mutex_unlock(&runtime->oss.params_lock);
1615 return err;
1616 }
1617 }
1618 /*
1619 * The ALSA's period might be a bit large than OSS one.
1620 * Fill the remain portion of ALSA period with zeros.
1621 */
1622 size = runtime->control->appl_ptr % runtime->period_size;
1623 if (size > 0) {
1624 size = runtime->period_size - size;
1625 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1626 size = (runtime->frame_bits * size) / 8;
1627 while (size > 0) {
1628 mm_segment_t fs;
1629 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1630 size -= size1;
1631 size1 *= 8;
1632 size1 /= runtime->sample_bits;
1633 snd_pcm_format_set_silence(runtime->format,
1634 runtime->oss.buffer,
1635 size1);
1636 size1 /= runtime->channels; /* frames */
1637 fs = snd_enter_user();
1638 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1639 snd_leave_user(fs);
1640 }
1641 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1642 void __user *buffers[runtime->channels];
1643 memset(buffers, 0, runtime->channels * sizeof(void *));
1644 snd_pcm_lib_writev(substream, buffers, size);
1645 }
1646 }
1647 mutex_unlock(&runtime->oss.params_lock);
1648 /*
1649 * finish sync: drain the buffer
1650 */
1651 __direct:
1652 saved_f_flags = substream->f_flags;
1653 substream->f_flags &= ~O_NONBLOCK;
1654 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1655 substream->f_flags = saved_f_flags;
1656 if (err < 0)
1657 return err;
1658 runtime->oss.prepare = 1;
1659 }
1660
1661 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1662 if (substream != NULL) {
1663 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1664 return err;
1665 runtime = substream->runtime;
1666 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1667 if (err < 0)
1668 return err;
1669 runtime->oss.buffer_used = 0;
1670 runtime->oss.prepare = 1;
1671 }
1672 return 0;
1673 }
1674
1675 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1676 {
1677 int idx;
1678
1679 for (idx = 1; idx >= 0; --idx) {
1680 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1681 struct snd_pcm_runtime *runtime;
1682 if (substream == NULL)
1683 continue;
1684 runtime = substream->runtime;
1685 if (rate < 1000)
1686 rate = 1000;
1687 else if (rate > 192000)
1688 rate = 192000;
1689 if (runtime->oss.rate != rate) {
1690 runtime->oss.params = 1;
1691 runtime->oss.rate = rate;
1692 }
1693 }
1694 return snd_pcm_oss_get_rate(pcm_oss_file);
1695 }
1696
1697 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1698 {
1699 struct snd_pcm_substream *substream;
1700 int err;
1701
1702 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1703 return err;
1704 return substream->runtime->oss.rate;
1705 }
1706
1707 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1708 {
1709 int idx;
1710 if (channels < 1)
1711 channels = 1;
1712 if (channels > 128)
1713 return -EINVAL;
1714 for (idx = 1; idx >= 0; --idx) {
1715 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1716 struct snd_pcm_runtime *runtime;
1717 if (substream == NULL)
1718 continue;
1719 runtime = substream->runtime;
1720 if (runtime->oss.channels != channels) {
1721 runtime->oss.params = 1;
1722 runtime->oss.channels = channels;
1723 }
1724 }
1725 return snd_pcm_oss_get_channels(pcm_oss_file);
1726 }
1727
1728 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1729 {
1730 struct snd_pcm_substream *substream;
1731 int err;
1732
1733 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1734 return err;
1735 return substream->runtime->oss.channels;
1736 }
1737
1738 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1739 {
1740 struct snd_pcm_substream *substream;
1741 int err;
1742
1743 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1744 return err;
1745 return substream->runtime->oss.period_bytes;
1746 }
1747
1748 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1749 {
1750 struct snd_pcm_substream *substream;
1751 int err;
1752 int direct;
1753 struct snd_pcm_hw_params *params;
1754 unsigned int formats = 0;
1755 struct snd_mask format_mask;
1756 int fmt;
1757
1758 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1759 return err;
1760 if (atomic_read(&substream->mmap_count))
1761 direct = 1;
1762 else
1763 direct = substream->oss.setup.direct;
1764 if (!direct)
1765 return AFMT_MU_LAW | AFMT_U8 |
1766 AFMT_S16_LE | AFMT_S16_BE |
1767 AFMT_S8 | AFMT_U16_LE |
1768 AFMT_U16_BE |
1769 AFMT_S32_LE | AFMT_S32_BE |
1770 AFMT_S24_LE | AFMT_S24_LE |
1771 AFMT_S24_PACKED;
1772 params = kmalloc(sizeof(*params), GFP_KERNEL);
1773 if (!params)
1774 return -ENOMEM;
1775 _snd_pcm_hw_params_any(params);
1776 err = snd_pcm_hw_refine(substream, params);
1777 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1778 kfree(params);
1779 if (err < 0)
1780 return err;
1781 for (fmt = 0; fmt < 32; ++fmt) {
1782 if (snd_mask_test(&format_mask, fmt)) {
1783 int f = snd_pcm_oss_format_to(fmt);
1784 if (f >= 0)
1785 formats |= f;
1786 }
1787 }
1788 return formats;
1789 }
1790
1791 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1792 {
1793 int formats, idx;
1794
1795 if (format != AFMT_QUERY) {
1796 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1797 if (formats < 0)
1798 return formats;
1799 if (!(formats & format))
1800 format = AFMT_U8;
1801 for (idx = 1; idx >= 0; --idx) {
1802 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1803 struct snd_pcm_runtime *runtime;
1804 if (substream == NULL)
1805 continue;
1806 runtime = substream->runtime;
1807 if (runtime->oss.format != format) {
1808 runtime->oss.params = 1;
1809 runtime->oss.format = format;
1810 }
1811 }
1812 }
1813 return snd_pcm_oss_get_format(pcm_oss_file);
1814 }
1815
1816 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1817 {
1818 struct snd_pcm_substream *substream;
1819 int err;
1820
1821 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1822 return err;
1823 return substream->runtime->oss.format;
1824 }
1825
1826 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1827 {
1828 struct snd_pcm_runtime *runtime;
1829
1830 if (substream == NULL)
1831 return 0;
1832 runtime = substream->runtime;
1833 if (subdivide == 0) {
1834 subdivide = runtime->oss.subdivision;
1835 if (subdivide == 0)
1836 subdivide = 1;
1837 return subdivide;
1838 }
1839 if (runtime->oss.subdivision || runtime->oss.fragshift)
1840 return -EINVAL;
1841 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1842 subdivide != 8 && subdivide != 16)
1843 return -EINVAL;
1844 runtime->oss.subdivision = subdivide;
1845 runtime->oss.params = 1;
1846 return subdivide;
1847 }
1848
1849 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1850 {
1851 int err = -EINVAL, idx;
1852
1853 for (idx = 1; idx >= 0; --idx) {
1854 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1855 if (substream == NULL)
1856 continue;
1857 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1858 return err;
1859 }
1860 return err;
1861 }
1862
1863 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1864 {
1865 struct snd_pcm_runtime *runtime;
1866
1867 if (substream == NULL)
1868 return 0;
1869 runtime = substream->runtime;
1870 if (runtime->oss.subdivision || runtime->oss.fragshift)
1871 return -EINVAL;
1872 runtime->oss.fragshift = val & 0xffff;
1873 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1874 if (runtime->oss.fragshift < 4) /* < 16 */
1875 runtime->oss.fragshift = 4;
1876 if (runtime->oss.maxfrags < 2)
1877 runtime->oss.maxfrags = 2;
1878 runtime->oss.params = 1;
1879 return 0;
1880 }
1881
1882 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1883 {
1884 int err = -EINVAL, idx;
1885
1886 for (idx = 1; idx >= 0; --idx) {
1887 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1888 if (substream == NULL)
1889 continue;
1890 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1891 return err;
1892 }
1893 return err;
1894 }
1895
1896 static int snd_pcm_oss_nonblock(struct file * file)
1897 {
1898 file->f_flags |= O_NONBLOCK;
1899 return 0;
1900 }
1901
1902 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1903 {
1904
1905 if (substream == NULL) {
1906 res &= ~DSP_CAP_DUPLEX;
1907 return res;
1908 }
1909 #ifdef DSP_CAP_MULTI
1910 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1911 if (substream->pstr->substream_count > 1)
1912 res |= DSP_CAP_MULTI;
1913 #endif
1914 /* DSP_CAP_REALTIME is set all times: */
1915 /* all ALSA drivers can return actual pointer in ring buffer */
1916 #if defined(DSP_CAP_REALTIME) && 0
1917 {
1918 struct snd_pcm_runtime *runtime = substream->runtime;
1919 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1920 res &= ~DSP_CAP_REALTIME;
1921 }
1922 #endif
1923 return res;
1924 }
1925
1926 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1927 {
1928 int result, idx;
1929
1930 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1931 for (idx = 0; idx < 2; idx++) {
1932 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1933 result = snd_pcm_oss_get_caps1(substream, result);
1934 }
1935 result |= 0x0001; /* revision - same as SB AWE 64 */
1936 return result;
1937 }
1938
1939 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1940 {
1941 struct snd_pcm_runtime *runtime = substream->runtime;
1942 snd_pcm_uframes_t appl_ptr;
1943 appl_ptr = hw_ptr + runtime->buffer_size;
1944 appl_ptr %= runtime->boundary;
1945 runtime->control->appl_ptr = appl_ptr;
1946 }
1947
1948 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1949 {
1950 struct snd_pcm_runtime *runtime;
1951 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1952 int err, cmd;
1953
1954 #ifdef OSS_DEBUG
1955 printk("pcm_oss: trigger = 0x%x\n", trigger);
1956 #endif
1957
1958 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1959 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1960
1961 if (psubstream) {
1962 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1963 return err;
1964 }
1965 if (csubstream) {
1966 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1967 return err;
1968 }
1969 if (psubstream) {
1970 runtime = psubstream->runtime;
1971 if (trigger & PCM_ENABLE_OUTPUT) {
1972 if (runtime->oss.trigger)
1973 goto _skip1;
1974 if (atomic_read(&psubstream->mmap_count))
1975 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1976 runtime->oss.trigger = 1;
1977 runtime->start_threshold = 1;
1978 cmd = SNDRV_PCM_IOCTL_START;
1979 } else {
1980 if (!runtime->oss.trigger)
1981 goto _skip1;
1982 runtime->oss.trigger = 0;
1983 runtime->start_threshold = runtime->boundary;
1984 cmd = SNDRV_PCM_IOCTL_DROP;
1985 runtime->oss.prepare = 1;
1986 }
1987 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1988 if (err < 0)
1989 return err;
1990 }
1991 _skip1:
1992 if (csubstream) {
1993 runtime = csubstream->runtime;
1994 if (trigger & PCM_ENABLE_INPUT) {
1995 if (runtime->oss.trigger)
1996 goto _skip2;
1997 runtime->oss.trigger = 1;
1998 runtime->start_threshold = 1;
1999 cmd = SNDRV_PCM_IOCTL_START;
2000 } else {
2001 if (!runtime->oss.trigger)
2002 goto _skip2;
2003 runtime->oss.trigger = 0;
2004 runtime->start_threshold = runtime->boundary;
2005 cmd = SNDRV_PCM_IOCTL_DROP;
2006 runtime->oss.prepare = 1;
2007 }
2008 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2009 if (err < 0)
2010 return err;
2011 }
2012 _skip2:
2013 return 0;
2014 }
2015
2016 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2017 {
2018 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2019 int result = 0;
2020
2021 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2022 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2023 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2024 result |= PCM_ENABLE_OUTPUT;
2025 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2026 result |= PCM_ENABLE_INPUT;
2027 return result;
2028 }
2029
2030 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2031 {
2032 struct snd_pcm_substream *substream;
2033 struct snd_pcm_runtime *runtime;
2034 snd_pcm_sframes_t delay;
2035 int err;
2036
2037 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2038 if (substream == NULL)
2039 return -EINVAL;
2040 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2041 return err;
2042 runtime = substream->runtime;
2043 if (runtime->oss.params || runtime->oss.prepare)
2044 return 0;
2045 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2046 if (err == -EPIPE)
2047 delay = 0; /* hack for broken OSS applications */
2048 else if (err < 0)
2049 return err;
2050 return snd_pcm_oss_bytes(substream, delay);
2051 }
2052
2053 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2054 {
2055 struct snd_pcm_substream *substream;
2056 struct snd_pcm_runtime *runtime;
2057 snd_pcm_sframes_t delay;
2058 int fixup;
2059 struct count_info info;
2060 int err;
2061
2062 if (_info == NULL)
2063 return -EFAULT;
2064 substream = pcm_oss_file->streams[stream];
2065 if (substream == NULL)
2066 return -EINVAL;
2067 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2068 return err;
2069 runtime = substream->runtime;
2070 if (runtime->oss.params || runtime->oss.prepare) {
2071 memset(&info, 0, sizeof(info));
2072 if (copy_to_user(_info, &info, sizeof(info)))
2073 return -EFAULT;
2074 return 0;
2075 }
2076 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2078 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2079 err = 0;
2080 delay = 0;
2081 fixup = 0;
2082 } else {
2083 fixup = runtime->oss.buffer_used;
2084 }
2085 } else {
2086 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2087 fixup = -runtime->oss.buffer_used;
2088 }
2089 if (err < 0)
2090 return err;
2091 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2092 if (atomic_read(&substream->mmap_count)) {
2093 snd_pcm_sframes_t n;
2094 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2095 if (n < 0)
2096 n += runtime->boundary;
2097 info.blocks = n / runtime->period_size;
2098 runtime->oss.prev_hw_ptr_interrupt = delay;
2099 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2100 snd_pcm_oss_simulate_fill(substream, delay);
2101 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2102 } else {
2103 delay = snd_pcm_oss_bytes(substream, delay);
2104 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2105 if (substream->oss.setup.buggyptr)
2106 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2107 else
2108 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2109 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2110 } else {
2111 delay += fixup;
2112 info.blocks = delay / runtime->oss.period_bytes;
2113 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2114 }
2115 }
2116 if (copy_to_user(_info, &info, sizeof(info)))
2117 return -EFAULT;
2118 return 0;
2119 }
2120
2121 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2122 {
2123 struct snd_pcm_substream *substream;
2124 struct snd_pcm_runtime *runtime;
2125 snd_pcm_sframes_t avail;
2126 int fixup;
2127 struct audio_buf_info info;
2128 int err;
2129
2130 if (_info == NULL)
2131 return -EFAULT;
2132 substream = pcm_oss_file->streams[stream];
2133 if (substream == NULL)
2134 return -EINVAL;
2135 runtime = substream->runtime;
2136
2137 if (runtime->oss.params &&
2138 (err = snd_pcm_oss_change_params(substream)) < 0)
2139 return err;
2140
2141 info.fragsize = runtime->oss.period_bytes;
2142 info.fragstotal = runtime->periods;
2143 if (runtime->oss.prepare) {
2144 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2145 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2146 info.fragments = runtime->oss.periods;
2147 } else {
2148 info.bytes = 0;
2149 info.fragments = 0;
2150 }
2151 } else {
2152 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2153 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2154 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2155 avail = runtime->buffer_size;
2156 err = 0;
2157 fixup = 0;
2158 } else {
2159 avail = runtime->buffer_size - avail;
2160 fixup = -runtime->oss.buffer_used;
2161 }
2162 } else {
2163 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2164 fixup = runtime->oss.buffer_used;
2165 }
2166 if (err < 0)
2167 return err;
2168 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2169 info.fragments = info.bytes / runtime->oss.period_bytes;
2170 }
2171
2172 #ifdef OSS_DEBUG
2173 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2174 #endif
2175 if (copy_to_user(_info, &info, sizeof(info)))
2176 return -EFAULT;
2177 return 0;
2178 }
2179
2180 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2181 {
2182 // it won't be probably implemented
2183 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2184 return -EINVAL;
2185 }
2186
2187 static const char *strip_task_path(const char *path)
2188 {
2189 const char *ptr, *ptrl = NULL;
2190 for (ptr = path; *ptr; ptr++) {
2191 if (*ptr == '/')
2192 ptrl = ptr + 1;
2193 }
2194 return ptrl;
2195 }
2196
2197 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2198 const char *task_name,
2199 struct snd_pcm_oss_setup *rsetup)
2200 {
2201 struct snd_pcm_oss_setup *setup;
2202
2203 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2204 do {
2205 for (setup = pcm->streams[stream].oss.setup_list; setup;
2206 setup = setup->next) {
2207 if (!strcmp(setup->task_name, task_name))
2208 goto out;
2209 }
2210 } while ((task_name = strip_task_path(task_name)) != NULL);
2211 out:
2212 if (setup)
2213 *rsetup = *setup;
2214 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2215 }
2216
2217 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2218 {
2219 struct snd_pcm_runtime *runtime;
2220 runtime = substream->runtime;
2221 vfree(runtime->oss.buffer);
2222 runtime->oss.buffer = NULL;
2223 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2224 snd_pcm_oss_plugin_clear(substream);
2225 #endif
2226 substream->oss.oss = 0;
2227 }
2228
2229 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2230 struct snd_pcm_oss_setup *setup,
2231 int minor)
2232 {
2233 struct snd_pcm_runtime *runtime;
2234
2235 substream->oss.oss = 1;
2236 substream->oss.setup = *setup;
2237 if (setup->nonblock)
2238 substream->f_flags |= O_NONBLOCK;
2239 else if (setup->block)
2240 substream->f_flags &= ~O_NONBLOCK;
2241 runtime = substream->runtime;
2242 runtime->oss.params = 1;
2243 runtime->oss.trigger = 1;
2244 runtime->oss.rate = 8000;
2245 mutex_init(&runtime->oss.params_lock);
2246 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2247 case SNDRV_MINOR_OSS_PCM_8:
2248 runtime->oss.format = AFMT_U8;
2249 break;
2250 case SNDRV_MINOR_OSS_PCM_16:
2251 runtime->oss.format = AFMT_S16_LE;
2252 break;
2253 default:
2254 runtime->oss.format = AFMT_MU_LAW;
2255 }
2256 runtime->oss.channels = 1;
2257 runtime->oss.fragshift = 0;
2258 runtime->oss.maxfrags = 0;
2259 runtime->oss.subdivision = 0;
2260 substream->pcm_release = snd_pcm_oss_release_substream;
2261 }
2262
2263 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2264 {
2265 int cidx;
2266 if (!pcm_oss_file)
2267 return 0;
2268 for (cidx = 0; cidx < 2; ++cidx) {
2269 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2270 if (substream)
2271 snd_pcm_release_substream(substream);
2272 }
2273 kfree(pcm_oss_file);
2274 return 0;
2275 }
2276
2277 static int snd_pcm_oss_open_file(struct file *file,
2278 struct snd_pcm *pcm,
2279 struct snd_pcm_oss_file **rpcm_oss_file,
2280 int minor,
2281 struct snd_pcm_oss_setup *setup)
2282 {
2283 int idx, err;
2284 struct snd_pcm_oss_file *pcm_oss_file;
2285 struct snd_pcm_substream *substream;
2286 unsigned int f_mode = file->f_mode;
2287
2288 if (rpcm_oss_file)
2289 *rpcm_oss_file = NULL;
2290
2291 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2292 if (pcm_oss_file == NULL)
2293 return -ENOMEM;
2294
2295 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2296 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2297 f_mode = FMODE_WRITE;
2298
2299 file->f_flags &= ~O_APPEND;
2300 for (idx = 0; idx < 2; idx++) {
2301 if (setup[idx].disable)
2302 continue;
2303 if (! pcm->streams[idx].substream_count)
2304 continue; /* no matching substream */
2305 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2306 if (! (f_mode & FMODE_WRITE))
2307 continue;
2308 } else {
2309 if (! (f_mode & FMODE_READ))
2310 continue;
2311 }
2312 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2313 if (err < 0) {
2314 snd_pcm_oss_release_file(pcm_oss_file);
2315 return err;
2316 }
2317
2318 pcm_oss_file->streams[idx] = substream;
2319 substream->file = pcm_oss_file;
2320 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2321 }
2322
2323 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2324 snd_pcm_oss_release_file(pcm_oss_file);
2325 return -EINVAL;
2326 }
2327
2328 file->private_data = pcm_oss_file;
2329 if (rpcm_oss_file)
2330 *rpcm_oss_file = pcm_oss_file;
2331 return 0;
2332 }
2333
2334
2335 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2336 {
2337 unsigned int idx;
2338
2339 if (snd_BUG_ON(!task || !name || size < 2))
2340 return -EINVAL;
2341 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2342 name[idx] = task->comm[idx];
2343 name[idx] = '\0';
2344 return 0;
2345 }
2346
2347 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2348 {
2349 int err;
2350 char task_name[32];
2351 struct snd_pcm *pcm;
2352 struct snd_pcm_oss_file *pcm_oss_file;
2353 struct snd_pcm_oss_setup setup[2];
2354 int nonblock;
2355 wait_queue_t wait;
2356
2357 pcm = snd_lookup_oss_minor_data(iminor(inode),
2358 SNDRV_OSS_DEVICE_TYPE_PCM);
2359 if (pcm == NULL) {
2360 err = -ENODEV;
2361 goto __error1;
2362 }
2363 err = snd_card_file_add(pcm->card, file);
2364 if (err < 0)
2365 goto __error1;
2366 if (!try_module_get(pcm->card->module)) {
2367 err = -EFAULT;
2368 goto __error2;
2369 }
2370 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2371 err = -EFAULT;
2372 goto __error;
2373 }
2374 memset(setup, 0, sizeof(setup));
2375 if (file->f_mode & FMODE_WRITE)
2376 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2377 task_name, &setup[0]);
2378 if (file->f_mode & FMODE_READ)
2379 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2380 task_name, &setup[1]);
2381
2382 nonblock = !!(file->f_flags & O_NONBLOCK);
2383 if (!nonblock)
2384 nonblock = nonblock_open;
2385
2386 init_waitqueue_entry(&wait, current);
2387 add_wait_queue(&pcm->open_wait, &wait);
2388 mutex_lock(&pcm->open_mutex);
2389 while (1) {
2390 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2391 iminor(inode), setup);
2392 if (err >= 0)
2393 break;
2394 if (err == -EAGAIN) {
2395 if (nonblock) {
2396 err = -EBUSY;
2397 break;
2398 }
2399 } else
2400 break;
2401 set_current_state(TASK_INTERRUPTIBLE);
2402 mutex_unlock(&pcm->open_mutex);
2403 schedule();
2404 mutex_lock(&pcm->open_mutex);
2405 if (signal_pending(current)) {
2406 err = -ERESTARTSYS;
2407 break;
2408 }
2409 }
2410 remove_wait_queue(&pcm->open_wait, &wait);
2411 mutex_unlock(&pcm->open_mutex);
2412 if (err < 0)
2413 goto __error;
2414 return err;
2415
2416 __error:
2417 module_put(pcm->card->module);
2418 __error2:
2419 snd_card_file_remove(pcm->card, file);
2420 __error1:
2421 return err;
2422 }
2423
2424 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2425 {
2426 struct snd_pcm *pcm;
2427 struct snd_pcm_substream *substream;
2428 struct snd_pcm_oss_file *pcm_oss_file;
2429
2430 pcm_oss_file = file->private_data;
2431 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2432 if (substream == NULL)
2433 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2434 if (snd_BUG_ON(!substream))
2435 return -ENXIO;
2436 pcm = substream->pcm;
2437 if (!pcm->card->shutdown)
2438 snd_pcm_oss_sync(pcm_oss_file);
2439 mutex_lock(&pcm->open_mutex);
2440 snd_pcm_oss_release_file(pcm_oss_file);
2441 mutex_unlock(&pcm->open_mutex);
2442 wake_up(&pcm->open_wait);
2443 module_put(pcm->card->module);
2444 snd_card_file_remove(pcm->card, file);
2445 return 0;
2446 }
2447
2448 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2449 {
2450 struct snd_pcm_oss_file *pcm_oss_file;
2451 int __user *p = (int __user *)arg;
2452 int res;
2453
2454 pcm_oss_file = file->private_data;
2455 if (cmd == OSS_GETVERSION)
2456 return put_user(SNDRV_OSS_VERSION, p);
2457 if (cmd == OSS_ALSAEMULVER)
2458 return put_user(1, p);
2459 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2460 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2461 struct snd_pcm_substream *substream;
2462 int idx;
2463 for (idx = 0; idx < 2; ++idx) {
2464 substream = pcm_oss_file->streams[idx];
2465 if (substream != NULL)
2466 break;
2467 }
2468 if (snd_BUG_ON(idx >= 2))
2469 return -ENXIO;
2470 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2471 }
2472 #endif
2473 if (((cmd >> 8) & 0xff) != 'P')
2474 return -EINVAL;
2475 #ifdef OSS_DEBUG
2476 printk("pcm_oss: ioctl = 0x%x\n", cmd);
2477 #endif
2478 switch (cmd) {
2479 case SNDCTL_DSP_RESET:
2480 return snd_pcm_oss_reset(pcm_oss_file);
2481 case SNDCTL_DSP_SYNC:
2482 return snd_pcm_oss_sync(pcm_oss_file);
2483 case SNDCTL_DSP_SPEED:
2484 if (get_user(res, p))
2485 return -EFAULT;
2486 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2487 return res;
2488 return put_user(res, p);
2489 case SOUND_PCM_READ_RATE:
2490 res = snd_pcm_oss_get_rate(pcm_oss_file);
2491 if (res < 0)
2492 return res;
2493 return put_user(res, p);
2494 case SNDCTL_DSP_STEREO:
2495 if (get_user(res, p))
2496 return -EFAULT;
2497 res = res > 0 ? 2 : 1;
2498 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2499 return res;
2500 return put_user(--res, p);
2501 case SNDCTL_DSP_GETBLKSIZE:
2502 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2503 if (res < 0)
2504 return res;
2505 return put_user(res, p);
2506 case SNDCTL_DSP_SETFMT:
2507 if (get_user(res, p))
2508 return -EFAULT;
2509 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2510 if (res < 0)
2511 return res;
2512 return put_user(res, p);
2513 case SOUND_PCM_READ_BITS:
2514 res = snd_pcm_oss_get_format(pcm_oss_file);
2515 if (res < 0)
2516 return res;
2517 return put_user(res, p);
2518 case SNDCTL_DSP_CHANNELS:
2519 if (get_user(res, p))
2520 return -EFAULT;
2521 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2522 if (res < 0)
2523 return res;
2524 return put_user(res, p);
2525 case SOUND_PCM_READ_CHANNELS:
2526 res = snd_pcm_oss_get_channels(pcm_oss_file);
2527 if (res < 0)
2528 return res;
2529 return put_user(res, p);
2530 case SOUND_PCM_WRITE_FILTER:
2531 case SOUND_PCM_READ_FILTER:
2532 return -EIO;
2533 case SNDCTL_DSP_POST:
2534 return snd_pcm_oss_post(pcm_oss_file);
2535 case SNDCTL_DSP_SUBDIVIDE:
2536 if (get_user(res, p))
2537 return -EFAULT;
2538 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2539 if (res < 0)
2540 return res;
2541 return put_user(res, p);
2542 case SNDCTL_DSP_SETFRAGMENT:
2543 if (get_user(res, p))
2544 return -EFAULT;
2545 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2546 case SNDCTL_DSP_GETFMTS:
2547 res = snd_pcm_oss_get_formats(pcm_oss_file);
2548 if (res < 0)
2549 return res;
2550 return put_user(res, p);
2551 case SNDCTL_DSP_GETOSPACE:
2552 case SNDCTL_DSP_GETISPACE:
2553 return snd_pcm_oss_get_space(pcm_oss_file,
2554 cmd == SNDCTL_DSP_GETISPACE ?
2555 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2556 (struct audio_buf_info __user *) arg);
2557 case SNDCTL_DSP_NONBLOCK:
2558 return snd_pcm_oss_nonblock(file);
2559 case SNDCTL_DSP_GETCAPS:
2560 res = snd_pcm_oss_get_caps(pcm_oss_file);
2561 if (res < 0)
2562 return res;
2563 return put_user(res, p);
2564 case SNDCTL_DSP_GETTRIGGER:
2565 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2566 if (res < 0)
2567 return res;
2568 return put_user(res, p);
2569 case SNDCTL_DSP_SETTRIGGER:
2570 if (get_user(res, p))
2571 return -EFAULT;
2572 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2573 case SNDCTL_DSP_GETIPTR:
2574 case SNDCTL_DSP_GETOPTR:
2575 return snd_pcm_oss_get_ptr(pcm_oss_file,
2576 cmd == SNDCTL_DSP_GETIPTR ?
2577 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2578 (struct count_info __user *) arg);
2579 case SNDCTL_DSP_MAPINBUF:
2580 case SNDCTL_DSP_MAPOUTBUF:
2581 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2582 cmd == SNDCTL_DSP_MAPINBUF ?
2583 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2584 (struct buffmem_desc __user *) arg);
2585 case SNDCTL_DSP_SETSYNCRO:
2586 /* stop DMA now.. */
2587 return 0;
2588 case SNDCTL_DSP_SETDUPLEX:
2589 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2590 return 0;
2591 return -EIO;
2592 case SNDCTL_DSP_GETODELAY:
2593 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2594 if (res < 0) {
2595 /* it's for sure, some broken apps don't check for error codes */
2596 put_user(0, p);
2597 return res;
2598 }
2599 return put_user(res, p);
2600 case SNDCTL_DSP_PROFILE:
2601 return 0; /* silently ignore */
2602 default:
2603 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2604 }
2605 return -EINVAL;
2606 }
2607
2608 #ifdef CONFIG_COMPAT
2609 /* all compatible */
2610 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2611 #else
2612 #define snd_pcm_oss_ioctl_compat NULL
2613 #endif
2614
2615 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2616 {
2617 struct snd_pcm_oss_file *pcm_oss_file;
2618 struct snd_pcm_substream *substream;
2619
2620 pcm_oss_file = file->private_data;
2621 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2622 if (substream == NULL)
2623 return -ENXIO;
2624 substream->f_flags = file->f_flags & O_NONBLOCK;
2625 #ifndef OSS_DEBUG
2626 return snd_pcm_oss_read1(substream, buf, count);
2627 #else
2628 {
2629 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2630 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2631 return res;
2632 }
2633 #endif
2634 }
2635
2636 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2637 {
2638 struct snd_pcm_oss_file *pcm_oss_file;
2639 struct snd_pcm_substream *substream;
2640 long result;
2641
2642 pcm_oss_file = file->private_data;
2643 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2644 if (substream == NULL)
2645 return -ENXIO;
2646 substream->f_flags = file->f_flags & O_NONBLOCK;
2647 result = snd_pcm_oss_write1(substream, buf, count);
2648 #ifdef OSS_DEBUG
2649 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2650 #endif
2651 return result;
2652 }
2653
2654 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2655 {
2656 struct snd_pcm_runtime *runtime = substream->runtime;
2657 if (atomic_read(&substream->mmap_count))
2658 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2659 else
2660 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2661 }
2662
2663 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2664 {
2665 struct snd_pcm_runtime *runtime = substream->runtime;
2666 if (atomic_read(&substream->mmap_count))
2667 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2668 else
2669 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2670 }
2671
2672 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2673 {
2674 struct snd_pcm_oss_file *pcm_oss_file;
2675 unsigned int mask;
2676 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2677
2678 pcm_oss_file = file->private_data;
2679
2680 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2681 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2682
2683 mask = 0;
2684 if (psubstream != NULL) {
2685 struct snd_pcm_runtime *runtime = psubstream->runtime;
2686 poll_wait(file, &runtime->sleep, wait);
2687 snd_pcm_stream_lock_irq(psubstream);
2688 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2689 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2690 snd_pcm_oss_playback_ready(psubstream)))
2691 mask |= POLLOUT | POLLWRNORM;
2692 snd_pcm_stream_unlock_irq(psubstream);
2693 }
2694 if (csubstream != NULL) {
2695 struct snd_pcm_runtime *runtime = csubstream->runtime;
2696 snd_pcm_state_t ostate;
2697 poll_wait(file, &runtime->sleep, wait);
2698 snd_pcm_stream_lock_irq(csubstream);
2699 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2700 snd_pcm_oss_capture_ready(csubstream))
2701 mask |= POLLIN | POLLRDNORM;
2702 snd_pcm_stream_unlock_irq(csubstream);
2703 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2704 struct snd_pcm_oss_file ofile;
2705 memset(&ofile, 0, sizeof(ofile));
2706 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2707 runtime->oss.trigger = 0;
2708 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2709 }
2710 }
2711
2712 return mask;
2713 }
2714
2715 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2716 {
2717 struct snd_pcm_oss_file *pcm_oss_file;
2718 struct snd_pcm_substream *substream = NULL;
2719 struct snd_pcm_runtime *runtime;
2720 int err;
2721
2722 #ifdef OSS_DEBUG
2723 printk("pcm_oss: mmap begin\n");
2724 #endif
2725 pcm_oss_file = file->private_data;
2726 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2727 case VM_READ | VM_WRITE:
2728 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2729 if (substream)
2730 break;
2731 /* Fall through */
2732 case VM_READ:
2733 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2734 break;
2735 case VM_WRITE:
2736 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2737 break;
2738 default:
2739 return -EINVAL;
2740 }
2741 /* set VM_READ access as well to fix memset() routines that do
2742 reads before writes (to improve performance) */
2743 area->vm_flags |= VM_READ;
2744 if (substream == NULL)
2745 return -ENXIO;
2746 runtime = substream->runtime;
2747 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2748 return -EIO;
2749 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2750 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2751 else
2752 return -EIO;
2753
2754 if (runtime->oss.params) {
2755 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2756 return err;
2757 }
2758 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2759 if (runtime->oss.plugin_first != NULL)
2760 return -EIO;
2761 #endif
2762
2763 if (area->vm_pgoff != 0)
2764 return -EINVAL;
2765
2766 err = snd_pcm_mmap_data(substream, file, area);
2767 if (err < 0)
2768 return err;
2769 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2770 runtime->silence_threshold = 0;
2771 runtime->silence_size = 0;
2772 #ifdef OSS_DEBUG
2773 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2774 #endif
2775 /* In mmap mode we never stop */
2776 runtime->stop_threshold = runtime->boundary;
2777
2778 return 0;
2779 }
2780
2781 #ifdef CONFIG_SND_VERBOSE_PROCFS
2782 /*
2783 * /proc interface
2784 */
2785
2786 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2787 struct snd_info_buffer *buffer)
2788 {
2789 struct snd_pcm_str *pstr = entry->private_data;
2790 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2791 mutex_lock(&pstr->oss.setup_mutex);
2792 while (setup) {
2793 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2794 setup->task_name,
2795 setup->periods,
2796 setup->period_size,
2797 setup->disable ? " disable" : "",
2798 setup->direct ? " direct" : "",
2799 setup->block ? " block" : "",
2800 setup->nonblock ? " non-block" : "",
2801 setup->partialfrag ? " partial-frag" : "",
2802 setup->nosilence ? " no-silence" : "");
2803 setup = setup->next;
2804 }
2805 mutex_unlock(&pstr->oss.setup_mutex);
2806 }
2807
2808 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2809 {
2810 struct snd_pcm_oss_setup *setup, *setupn;
2811
2812 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2813 setup; setup = setupn) {
2814 setupn = setup->next;
2815 kfree(setup->task_name);
2816 kfree(setup);
2817 }
2818 pstr->oss.setup_list = NULL;
2819 }
2820
2821 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2822 struct snd_info_buffer *buffer)
2823 {
2824 struct snd_pcm_str *pstr = entry->private_data;
2825 char line[128], str[32], task_name[32], *ptr;
2826 int idx1;
2827 struct snd_pcm_oss_setup *setup, *setup1, template;
2828
2829 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2830 mutex_lock(&pstr->oss.setup_mutex);
2831 memset(&template, 0, sizeof(template));
2832 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2833 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2834 snd_pcm_oss_proc_free_setup_list(pstr);
2835 mutex_unlock(&pstr->oss.setup_mutex);
2836 continue;
2837 }
2838 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2839 if (!strcmp(setup->task_name, task_name)) {
2840 template = *setup;
2841 break;
2842 }
2843 }
2844 ptr = snd_info_get_str(str, ptr, sizeof(str));
2845 template.periods = simple_strtoul(str, NULL, 10);
2846 ptr = snd_info_get_str(str, ptr, sizeof(str));
2847 template.period_size = simple_strtoul(str, NULL, 10);
2848 for (idx1 = 31; idx1 >= 0; idx1--)
2849 if (template.period_size & (1 << idx1))
2850 break;
2851 for (idx1--; idx1 >= 0; idx1--)
2852 template.period_size &= ~(1 << idx1);
2853 do {
2854 ptr = snd_info_get_str(str, ptr, sizeof(str));
2855 if (!strcmp(str, "disable")) {
2856 template.disable = 1;
2857 } else if (!strcmp(str, "direct")) {
2858 template.direct = 1;
2859 } else if (!strcmp(str, "block")) {
2860 template.block = 1;
2861 } else if (!strcmp(str, "non-block")) {
2862 template.nonblock = 1;
2863 } else if (!strcmp(str, "partial-frag")) {
2864 template.partialfrag = 1;
2865 } else if (!strcmp(str, "no-silence")) {
2866 template.nosilence = 1;
2867 } else if (!strcmp(str, "buggy-ptr")) {
2868 template.buggyptr = 1;
2869 }
2870 } while (*str);
2871 if (setup == NULL) {
2872 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2873 if (! setup) {
2874 buffer->error = -ENOMEM;
2875 mutex_lock(&pstr->oss.setup_mutex);
2876 return;
2877 }
2878 if (pstr->oss.setup_list == NULL)
2879 pstr->oss.setup_list = setup;
2880 else {
2881 for (setup1 = pstr->oss.setup_list;
2882 setup1->next; setup1 = setup1->next);
2883 setup1->next = setup;
2884 }
2885 template.task_name = kstrdup(task_name, GFP_KERNEL);
2886 if (! template.task_name) {
2887 kfree(setup);
2888 buffer->error = -ENOMEM;
2889 mutex_lock(&pstr->oss.setup_mutex);
2890 return;
2891 }
2892 }
2893 *setup = template;
2894 mutex_unlock(&pstr->oss.setup_mutex);
2895 }
2896 }
2897
2898 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2899 {
2900 int stream;
2901 for (stream = 0; stream < 2; ++stream) {
2902 struct snd_info_entry *entry;
2903 struct snd_pcm_str *pstr = &pcm->streams[stream];
2904 if (pstr->substream_count == 0)
2905 continue;
2906 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2907 entry->content = SNDRV_INFO_CONTENT_TEXT;
2908 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2909 entry->c.text.read = snd_pcm_oss_proc_read;
2910 entry->c.text.write = snd_pcm_oss_proc_write;
2911 entry->private_data = pstr;
2912 if (snd_info_register(entry) < 0) {
2913 snd_info_free_entry(entry);
2914 entry = NULL;
2915 }
2916 }
2917 pstr->oss.proc_entry = entry;
2918 }
2919 }
2920
2921 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2922 {
2923 int stream;
2924 for (stream = 0; stream < 2; ++stream) {
2925 struct snd_pcm_str *pstr = &pcm->streams[stream];
2926 snd_info_free_entry(pstr->oss.proc_entry);
2927 pstr->oss.proc_entry = NULL;
2928 snd_pcm_oss_proc_free_setup_list(pstr);
2929 }
2930 }
2931 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2932 #define snd_pcm_oss_proc_init(pcm)
2933 #define snd_pcm_oss_proc_done(pcm)
2934 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2935
2936 /*
2937 * ENTRY functions
2938 */
2939
2940 static const struct file_operations snd_pcm_oss_f_reg =
2941 {
2942 .owner = THIS_MODULE,
2943 .read = snd_pcm_oss_read,
2944 .write = snd_pcm_oss_write,
2945 .open = snd_pcm_oss_open,
2946 .release = snd_pcm_oss_release,
2947 .poll = snd_pcm_oss_poll,
2948 .unlocked_ioctl = snd_pcm_oss_ioctl,
2949 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2950 .mmap = snd_pcm_oss_mmap,
2951 };
2952
2953 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2954 {
2955 char name[128];
2956 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2957 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2958 pcm->card, index, &snd_pcm_oss_f_reg,
2959 pcm, name) < 0) {
2960 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2961 pcm->card->number, pcm->device);
2962 }
2963 }
2964
2965 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2966 {
2967 pcm->oss.reg = 0;
2968 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2969 char name[128];
2970 int duplex;
2971 register_oss_dsp(pcm, 0);
2972 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2973 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2974 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2975 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2976 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2977 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2978 pcm->card->number,
2979 name);
2980 #endif
2981 pcm->oss.reg++;
2982 pcm->oss.reg_mask |= 1;
2983 }
2984 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2985 register_oss_dsp(pcm, 1);
2986 pcm->oss.reg++;
2987 pcm->oss.reg_mask |= 2;
2988 }
2989
2990 if (pcm->oss.reg)
2991 snd_pcm_oss_proc_init(pcm);
2992
2993 return 0;
2994 }
2995
2996 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2997 {
2998 if (pcm->oss.reg) {
2999 if (pcm->oss.reg_mask & 1) {
3000 pcm->oss.reg_mask &= ~1;
3001 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3002 pcm->card, 0);
3003 }
3004 if (pcm->oss.reg_mask & 2) {
3005 pcm->oss.reg_mask &= ~2;
3006 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3007 pcm->card, 1);
3008 }
3009 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3010 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3011 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3012 #endif
3013 }
3014 pcm->oss.reg = 0;
3015 }
3016 return 0;
3017 }
3018
3019 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3020 {
3021 snd_pcm_oss_disconnect_minor(pcm);
3022 snd_pcm_oss_proc_done(pcm);
3023 return 0;
3024 }
3025
3026 static struct snd_pcm_notify snd_pcm_oss_notify =
3027 {
3028 .n_register = snd_pcm_oss_register_minor,
3029 .n_disconnect = snd_pcm_oss_disconnect_minor,
3030 .n_unregister = snd_pcm_oss_unregister_minor,
3031 };
3032
3033 static int __init alsa_pcm_oss_init(void)
3034 {
3035 int i;
3036 int err;
3037
3038 /* check device map table */
3039 for (i = 0; i < SNDRV_CARDS; i++) {
3040 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3041 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3042 i, dsp_map[i]);
3043 dsp_map[i] = 0;
3044 }
3045 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3046 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3047 i, adsp_map[i]);
3048 adsp_map[i] = 1;
3049 }
3050 }
3051 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3052 return err;
3053 return 0;
3054 }
3055
3056 static void __exit alsa_pcm_oss_exit(void)
3057 {
3058 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3059 }
3060
3061 module_init(alsa_pcm_oss_init)
3062 module_exit(alsa_pcm_oss_exit)
kernel source for telekom puls (alcatel/mediatek)