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eeepc-laptop: right parent device
[linux-2.6/linux-acpi-2.6.git] / sound / core / oss / pcm_oss.c
blobdbe406b82591058dd515686d8d13eb800418b416
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/math64.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44
45 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47 static int dsp_map[SNDRV_CARDS];
48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49 static int nonblock_open = 1;
50
51 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53 MODULE_LICENSE("GPL");
54 module_param_array(dsp_map, int, NULL, 0444);
55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56 module_param_array(adsp_map, int, NULL, 0444);
57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58 module_param(nonblock_open, bool, 0644);
59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 /*
81 * helper functions to process hw_params
82 */
83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84 {
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105 }
106
107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108 {
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129 }
130
131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132 {
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139 }
140
141 /**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149 static unsigned int
150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152 {
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165 }
166
167 /**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175 static unsigned int
176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178 {
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191 }
192
193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196 {
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204 }
205
206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210 {
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220 }
221
222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225 {
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251 }
252
253 /**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269 {
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279 }
280
281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284 {
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312 }
313
314 /**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330 {
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340 }
341
342 static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345 {
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356 }
357
358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360 {
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372 }
373
374 /* Return 1 if min is nearer to best than max */
375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378 {
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384 }
385
386 /**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404 {
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 if (max < 0)
457 return max;
458 last = 1;
459 }
460 _end:
461 kfree(save);
462 if (last)
463 v = snd_pcm_hw_param_last(pcm, params, var, dir);
464 else
465 v = snd_pcm_hw_param_first(pcm, params, var, dir);
466 snd_BUG_ON(v < 0);
467 return v;
468 }
469
470 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
471 snd_pcm_hw_param_t var, unsigned int val,
472 int dir)
473 {
474 int changed;
475 if (hw_is_mask(var)) {
476 struct snd_mask *m = hw_param_mask(params, var);
477 if (val == 0 && dir < 0) {
478 changed = -EINVAL;
479 snd_mask_none(m);
480 } else {
481 if (dir > 0)
482 val++;
483 else if (dir < 0)
484 val--;
485 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
486 }
487 } else if (hw_is_interval(var)) {
488 struct snd_interval *i = hw_param_interval(params, var);
489 if (val == 0 && dir < 0) {
490 changed = -EINVAL;
491 snd_interval_none(i);
492 } else if (dir == 0)
493 changed = snd_interval_refine_set(i, val);
494 else {
495 struct snd_interval t;
496 t.openmin = 1;
497 t.openmax = 1;
498 t.empty = 0;
499 t.integer = 0;
500 if (dir < 0) {
501 t.min = val - 1;
502 t.max = val;
503 } else {
504 t.min = val;
505 t.max = val+1;
506 }
507 changed = snd_interval_refine(i, &t);
508 }
509 } else
510 return -EINVAL;
511 if (changed) {
512 params->cmask |= 1 << var;
513 params->rmask |= 1 << var;
514 }
515 return changed;
516 }
517
518 /**
519 * snd_pcm_hw_param_set
520 * @pcm: PCM instance
521 * @params: the hw_params instance
522 * @var: parameter to retrieve
523 * @val: value to set
524 * @dir: pointer to the direction (-1,0,1) or NULL
525 *
526 * Inside configuration space defined by PARAMS remove from PAR all
527 * values != VAL. Reduce configuration space accordingly.
528 * Return VAL or -EINVAL if the configuration space is empty
529 */
530 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
531 struct snd_pcm_hw_params *params,
532 snd_pcm_hw_param_t var, unsigned int val,
533 int dir)
534 {
535 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
536 if (changed < 0)
537 return changed;
538 if (params->rmask) {
539 int err = snd_pcm_hw_refine(pcm, params);
540 if (err < 0)
541 return err;
542 }
543 return snd_pcm_hw_param_value(params, var, NULL);
544 }
545
546 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
547 snd_pcm_hw_param_t var)
548 {
549 int changed;
550 changed = snd_interval_setinteger(hw_param_interval(params, var));
551 if (changed) {
552 params->cmask |= 1 << var;
553 params->rmask |= 1 << var;
554 }
555 return changed;
556 }
557
558 /*
559 * plugin
560 */
561
562 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
563 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
564 {
565 struct snd_pcm_runtime *runtime = substream->runtime;
566 struct snd_pcm_plugin *plugin, *next;
567
568 plugin = runtime->oss.plugin_first;
569 while (plugin) {
570 next = plugin->next;
571 snd_pcm_plugin_free(plugin);
572 plugin = next;
573 }
574 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
575 return 0;
576 }
577
578 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
579 {
580 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
581 plugin->next = runtime->oss.plugin_first;
582 plugin->prev = NULL;
583 if (runtime->oss.plugin_first) {
584 runtime->oss.plugin_first->prev = plugin;
585 runtime->oss.plugin_first = plugin;
586 } else {
587 runtime->oss.plugin_last =
588 runtime->oss.plugin_first = plugin;
589 }
590 return 0;
591 }
592
593 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
594 {
595 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
596 plugin->next = NULL;
597 plugin->prev = runtime->oss.plugin_last;
598 if (runtime->oss.plugin_last) {
599 runtime->oss.plugin_last->next = plugin;
600 runtime->oss.plugin_last = plugin;
601 } else {
602 runtime->oss.plugin_last =
603 runtime->oss.plugin_first = plugin;
604 }
605 return 0;
606 }
607 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
608
609 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
610 {
611 struct snd_pcm_runtime *runtime = substream->runtime;
612 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
613 long bytes = frames_to_bytes(runtime, frames);
614 if (buffer_size == runtime->oss.buffer_bytes)
615 return bytes;
616 #if BITS_PER_LONG >= 64
617 return runtime->oss.buffer_bytes * bytes / buffer_size;
618 #else
619 {
620 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
621 return div_u64(bsize, buffer_size);
622 }
623 #endif
624 }
625
626 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
627 {
628 struct snd_pcm_runtime *runtime = substream->runtime;
629 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
630 if (buffer_size == runtime->oss.buffer_bytes)
631 return bytes_to_frames(runtime, bytes);
632 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
633 }
634
635 /* define extended formats in the recent OSS versions (if any) */
636 /* linear formats */
637 #define AFMT_S32_LE 0x00001000
638 #define AFMT_S32_BE 0x00002000
639 #define AFMT_S24_LE 0x00008000
640 #define AFMT_S24_BE 0x00010000
641 #define AFMT_S24_PACKED 0x00040000
642
643 /* other supported formats */
644 #define AFMT_FLOAT 0x00004000
645 #define AFMT_SPDIF_RAW 0x00020000
646
647 /* unsupported formats */
648 #define AFMT_AC3 0x00000400
649 #define AFMT_VORBIS 0x00000800
650
651 static int snd_pcm_oss_format_from(int format)
652 {
653 switch (format) {
654 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
655 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
656 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
657 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
658 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
659 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
660 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
661 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
662 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
663 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
664 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
665 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
666 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
667 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
668 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
669 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
670 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
671 default: return SNDRV_PCM_FORMAT_U8;
672 }
673 }
674
675 static int snd_pcm_oss_format_to(int format)
676 {
677 switch (format) {
678 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
679 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
680 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
681 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
682 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
683 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
684 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
685 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
686 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
687 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
688 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
689 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
690 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
691 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
692 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
693 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
694 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
695 default: return -EINVAL;
696 }
697 }
698
699 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
700 struct snd_pcm_hw_params *oss_params,
701 struct snd_pcm_hw_params *slave_params)
702 {
703 size_t s;
704 size_t oss_buffer_size, oss_period_size, oss_periods;
705 size_t min_period_size, max_period_size;
706 struct snd_pcm_runtime *runtime = substream->runtime;
707 size_t oss_frame_size;
708
709 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
710 params_channels(oss_params) / 8;
711
712 oss_buffer_size = snd_pcm_plug_client_size(substream,
713 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
714 oss_buffer_size = 1 << ld2(oss_buffer_size);
715 if (atomic_read(&substream->mmap_count)) {
716 if (oss_buffer_size > runtime->oss.mmap_bytes)
717 oss_buffer_size = runtime->oss.mmap_bytes;
718 }
719
720 if (substream->oss.setup.period_size > 16)
721 oss_period_size = substream->oss.setup.period_size;
722 else if (runtime->oss.fragshift) {
723 oss_period_size = 1 << runtime->oss.fragshift;
724 if (oss_period_size > oss_buffer_size / 2)
725 oss_period_size = oss_buffer_size / 2;
726 } else {
727 int sd;
728 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
729
730 oss_period_size = oss_buffer_size;
731 do {
732 oss_period_size /= 2;
733 } while (oss_period_size > bytes_per_sec);
734 if (runtime->oss.subdivision == 0) {
735 sd = 4;
736 if (oss_period_size / sd > 4096)
737 sd *= 2;
738 if (oss_period_size / sd < 4096)
739 sd = 1;
740 } else
741 sd = runtime->oss.subdivision;
742 oss_period_size /= sd;
743 if (oss_period_size < 16)
744 oss_period_size = 16;
745 }
746
747 min_period_size = snd_pcm_plug_client_size(substream,
748 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
749 min_period_size *= oss_frame_size;
750 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
751 if (oss_period_size < min_period_size)
752 oss_period_size = min_period_size;
753
754 max_period_size = snd_pcm_plug_client_size(substream,
755 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
756 max_period_size *= oss_frame_size;
757 max_period_size = 1 << ld2(max_period_size);
758 if (oss_period_size > max_period_size)
759 oss_period_size = max_period_size;
760
761 oss_periods = oss_buffer_size / oss_period_size;
762
763 if (substream->oss.setup.periods > 1)
764 oss_periods = substream->oss.setup.periods;
765
766 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
767 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
768 s = runtime->oss.maxfrags;
769 if (oss_periods > s)
770 oss_periods = s;
771
772 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
773 if (s < 2)
774 s = 2;
775 if (oss_periods < s)
776 oss_periods = s;
777
778 while (oss_period_size * oss_periods > oss_buffer_size)
779 oss_period_size /= 2;
780
781 if (oss_period_size < 16)
782 return -EINVAL;
783 runtime->oss.period_bytes = oss_period_size;
784 runtime->oss.period_frames = 1;
785 runtime->oss.periods = oss_periods;
786 return 0;
787 }
788
789 static int choose_rate(struct snd_pcm_substream *substream,
790 struct snd_pcm_hw_params *params, unsigned int best_rate)
791 {
792 struct snd_interval *it;
793 struct snd_pcm_hw_params *save;
794 unsigned int rate, prev;
795
796 save = kmalloc(sizeof(*save), GFP_KERNEL);
797 if (save == NULL)
798 return -ENOMEM;
799 *save = *params;
800 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
801
802 /* try multiples of the best rate */
803 rate = best_rate;
804 for (;;) {
805 if (it->max < rate || (it->max == rate && it->openmax))
806 break;
807 if (it->min < rate || (it->min == rate && !it->openmin)) {
808 int ret;
809 ret = snd_pcm_hw_param_set(substream, params,
810 SNDRV_PCM_HW_PARAM_RATE,
811 rate, 0);
812 if (ret == (int)rate) {
813 kfree(save);
814 return rate;
815 }
816 *params = *save;
817 }
818 prev = rate;
819 rate += best_rate;
820 if (rate <= prev)
821 break;
822 }
823
824 /* not found, use the nearest rate */
825 kfree(save);
826 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
827 }
828
829 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
830 {
831 struct snd_pcm_runtime *runtime = substream->runtime;
832 struct snd_pcm_hw_params *params, *sparams;
833 struct snd_pcm_sw_params *sw_params;
834 ssize_t oss_buffer_size, oss_period_size;
835 size_t oss_frame_size;
836 int err;
837 int direct;
838 int format, sformat, n;
839 struct snd_mask sformat_mask;
840 struct snd_mask mask;
841
842 if (mutex_lock_interruptible(&runtime->oss.params_lock))
843 return -EINTR;
844 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
845 params = kmalloc(sizeof(*params), GFP_KERNEL);
846 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
847 if (!sw_params || !params || !sparams) {
848 snd_printd("No memory\n");
849 err = -ENOMEM;
850 goto failure;
851 }
852
853 if (atomic_read(&substream->mmap_count))
854 direct = 1;
855 else
856 direct = substream->oss.setup.direct;
857
858 _snd_pcm_hw_params_any(sparams);
859 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
860 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
861 snd_mask_none(&mask);
862 if (atomic_read(&substream->mmap_count))
863 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
864 else {
865 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
866 if (!direct)
867 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
868 }
869 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
870 if (err < 0) {
871 snd_printd("No usable accesses\n");
872 err = -EINVAL;
873 goto failure;
874 }
875 choose_rate(substream, sparams, runtime->oss.rate);
876 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
877
878 format = snd_pcm_oss_format_from(runtime->oss.format);
879
880 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
881 if (direct)
882 sformat = format;
883 else
884 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
885
886 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
887 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
888 if (snd_mask_test(&sformat_mask, sformat) &&
889 snd_pcm_oss_format_to(sformat) >= 0)
890 break;
891 }
892 if (sformat > SNDRV_PCM_FORMAT_LAST) {
893 snd_printd("Cannot find a format!!!\n");
894 err = -EINVAL;
895 goto failure;
896 }
897 }
898 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
899 if (err < 0)
900 goto failure;
901
902 if (direct) {
903 memcpy(params, sparams, sizeof(*params));
904 } else {
905 _snd_pcm_hw_params_any(params);
906 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
907 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
908 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
909 snd_pcm_oss_format_from(runtime->oss.format), 0);
910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
911 runtime->oss.channels, 0);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
913 runtime->oss.rate, 0);
914 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
915 params_access(params), params_format(params),
916 params_channels(params), params_rate(params));
917 }
918 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
919 params_access(sparams), params_format(sparams),
920 params_channels(sparams), params_rate(sparams));
921
922 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
923 params_channels(params) / 8;
924
925 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
926 snd_pcm_oss_plugin_clear(substream);
927 if (!direct) {
928 /* add necessary plugins */
929 snd_pcm_oss_plugin_clear(substream);
930 if ((err = snd_pcm_plug_format_plugins(substream,
931 params,
932 sparams)) < 0) {
933 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
934 snd_pcm_oss_plugin_clear(substream);
935 goto failure;
936 }
937 if (runtime->oss.plugin_first) {
938 struct snd_pcm_plugin *plugin;
939 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
940 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
941 snd_pcm_oss_plugin_clear(substream);
942 goto failure;
943 }
944 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
945 err = snd_pcm_plugin_append(plugin);
946 } else {
947 err = snd_pcm_plugin_insert(plugin);
948 }
949 if (err < 0) {
950 snd_pcm_oss_plugin_clear(substream);
951 goto failure;
952 }
953 }
954 }
955 #endif
956
957 err = snd_pcm_oss_period_size(substream, params, sparams);
958 if (err < 0)
959 goto failure;
960
961 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
962 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
963 if (err < 0)
964 goto failure;
965
966 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
967 runtime->oss.periods, NULL);
968 if (err < 0)
969 goto failure;
970
971 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
972
973 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
974 snd_printd("HW_PARAMS failed: %i\n", err);
975 goto failure;
976 }
977
978 memset(sw_params, 0, sizeof(*sw_params));
979 if (runtime->oss.trigger) {
980 sw_params->start_threshold = 1;
981 } else {
982 sw_params->start_threshold = runtime->boundary;
983 }
984 if (atomic_read(&substream->mmap_count) ||
985 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
986 sw_params->stop_threshold = runtime->boundary;
987 else
988 sw_params->stop_threshold = runtime->buffer_size;
989 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
990 sw_params->period_step = 1;
991 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
992 1 : runtime->period_size;
993 if (atomic_read(&substream->mmap_count) ||
994 substream->oss.setup.nosilence) {
995 sw_params->silence_threshold = 0;
996 sw_params->silence_size = 0;
997 } else {
998 snd_pcm_uframes_t frames;
999 frames = runtime->period_size + 16;
1000 if (frames > runtime->buffer_size)
1001 frames = runtime->buffer_size;
1002 sw_params->silence_threshold = frames;
1003 sw_params->silence_size = frames;
1004 }
1005
1006 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1007 snd_printd("SW_PARAMS failed: %i\n", err);
1008 goto failure;
1009 }
1010
1011 runtime->oss.periods = params_periods(sparams);
1012 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1013 if (oss_period_size < 0) {
1014 err = -EINVAL;
1015 goto failure;
1016 }
1017 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1018 if (runtime->oss.plugin_first) {
1019 err = snd_pcm_plug_alloc(substream, oss_period_size);
1020 if (err < 0)
1021 goto failure;
1022 }
1023 #endif
1024 oss_period_size *= oss_frame_size;
1025
1026 oss_buffer_size = oss_period_size * runtime->oss.periods;
1027 if (oss_buffer_size < 0) {
1028 err = -EINVAL;
1029 goto failure;
1030 }
1031
1032 runtime->oss.period_bytes = oss_period_size;
1033 runtime->oss.buffer_bytes = oss_buffer_size;
1034
1035 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1036 runtime->oss.period_bytes,
1037 runtime->oss.buffer_bytes);
1038 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1039 params_period_size(sparams),
1040 params_buffer_size(sparams));
1041
1042 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1043 runtime->oss.channels = params_channels(params);
1044 runtime->oss.rate = params_rate(params);
1045
1046 runtime->oss.params = 0;
1047 runtime->oss.prepare = 1;
1048 vfree(runtime->oss.buffer);
1049 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1050 runtime->oss.buffer_used = 0;
1051 if (runtime->dma_area)
1052 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1053
1054 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1055
1056 err = 0;
1057 failure:
1058 kfree(sw_params);
1059 kfree(params);
1060 kfree(sparams);
1061 mutex_unlock(&runtime->oss.params_lock);
1062 return err;
1063 }
1064
1065 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1066 {
1067 int idx, err;
1068 struct snd_pcm_substream *asubstream = NULL, *substream;
1069
1070 for (idx = 0; idx < 2; idx++) {
1071 substream = pcm_oss_file->streams[idx];
1072 if (substream == NULL)
1073 continue;
1074 if (asubstream == NULL)
1075 asubstream = substream;
1076 if (substream->runtime->oss.params) {
1077 err = snd_pcm_oss_change_params(substream);
1078 if (err < 0)
1079 return err;
1080 }
1081 }
1082 if (!asubstream)
1083 return -EIO;
1084 if (r_substream)
1085 *r_substream = asubstream;
1086 return 0;
1087 }
1088
1089 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1090 {
1091 int err;
1092 struct snd_pcm_runtime *runtime = substream->runtime;
1093
1094 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1095 if (err < 0) {
1096 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1097 return err;
1098 }
1099 runtime->oss.prepare = 0;
1100 runtime->oss.prev_hw_ptr_interrupt = 0;
1101 runtime->oss.period_ptr = 0;
1102 runtime->oss.buffer_used = 0;
1103
1104 return 0;
1105 }
1106
1107 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1108 {
1109 struct snd_pcm_runtime *runtime;
1110 int err;
1111
1112 if (substream == NULL)
1113 return 0;
1114 runtime = substream->runtime;
1115 if (runtime->oss.params) {
1116 err = snd_pcm_oss_change_params(substream);
1117 if (err < 0)
1118 return err;
1119 }
1120 if (runtime->oss.prepare) {
1121 err = snd_pcm_oss_prepare(substream);
1122 if (err < 0)
1123 return err;
1124 }
1125 return 0;
1126 }
1127
1128 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1129 {
1130 struct snd_pcm_runtime *runtime;
1131 snd_pcm_uframes_t frames;
1132 int err = 0;
1133
1134 while (1) {
1135 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1136 if (err < 0)
1137 break;
1138 runtime = substream->runtime;
1139 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1140 break;
1141 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1142 /* until avail(delay) <= buffer_size */
1143 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1144 frames /= runtime->period_size;
1145 frames *= runtime->period_size;
1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1147 if (err < 0)
1148 break;
1149 }
1150 return err;
1151 }
1152
1153 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1154 {
1155 struct snd_pcm_runtime *runtime = substream->runtime;
1156 int ret;
1157 while (1) {
1158 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1159 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1160 #ifdef OSS_DEBUG
1161 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1162 printk(KERN_DEBUG "pcm_oss: write: "
1163 "recovering from XRUN\n");
1164 else
1165 printk(KERN_DEBUG "pcm_oss: write: "
1166 "recovering from SUSPEND\n");
1167 #endif
1168 ret = snd_pcm_oss_prepare(substream);
1169 if (ret < 0)
1170 break;
1171 }
1172 if (in_kernel) {
1173 mm_segment_t fs;
1174 fs = snd_enter_user();
1175 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1176 snd_leave_user(fs);
1177 } else {
1178 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1179 }
1180 if (ret != -EPIPE && ret != -ESTRPIPE)
1181 break;
1182 /* test, if we can't store new data, because the stream */
1183 /* has not been started */
1184 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1185 return -EAGAIN;
1186 }
1187 return ret;
1188 }
1189
1190 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1191 {
1192 struct snd_pcm_runtime *runtime = substream->runtime;
1193 snd_pcm_sframes_t delay;
1194 int ret;
1195 while (1) {
1196 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1197 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1198 #ifdef OSS_DEBUG
1199 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1200 printk(KERN_DEBUG "pcm_oss: read: "
1201 "recovering from XRUN\n");
1202 else
1203 printk(KERN_DEBUG "pcm_oss: read: "
1204 "recovering from SUSPEND\n");
1205 #endif
1206 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1207 if (ret < 0)
1208 break;
1209 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1210 ret = snd_pcm_oss_prepare(substream);
1211 if (ret < 0)
1212 break;
1213 }
1214 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1215 if (ret < 0)
1216 break;
1217 if (in_kernel) {
1218 mm_segment_t fs;
1219 fs = snd_enter_user();
1220 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1221 snd_leave_user(fs);
1222 } else {
1223 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1224 }
1225 if (ret == -EPIPE) {
1226 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1227 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1228 if (ret < 0)
1229 break;
1230 }
1231 continue;
1232 }
1233 if (ret != -ESTRPIPE)
1234 break;
1235 }
1236 return ret;
1237 }
1238
1239 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1240 {
1241 struct snd_pcm_runtime *runtime = substream->runtime;
1242 int ret;
1243 while (1) {
1244 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1245 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1246 #ifdef OSS_DEBUG
1247 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1248 printk(KERN_DEBUG "pcm_oss: writev: "
1249 "recovering from XRUN\n");
1250 else
1251 printk(KERN_DEBUG "pcm_oss: writev: "
1252 "recovering from SUSPEND\n");
1253 #endif
1254 ret = snd_pcm_oss_prepare(substream);
1255 if (ret < 0)
1256 break;
1257 }
1258 if (in_kernel) {
1259 mm_segment_t fs;
1260 fs = snd_enter_user();
1261 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1262 snd_leave_user(fs);
1263 } else {
1264 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1265 }
1266 if (ret != -EPIPE && ret != -ESTRPIPE)
1267 break;
1268
1269 /* test, if we can't store new data, because the stream */
1270 /* has not been started */
1271 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1272 return -EAGAIN;
1273 }
1274 return ret;
1275 }
1276
1277 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1278 {
1279 struct snd_pcm_runtime *runtime = substream->runtime;
1280 int ret;
1281 while (1) {
1282 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1283 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1284 #ifdef OSS_DEBUG
1285 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1286 printk(KERN_DEBUG "pcm_oss: readv: "
1287 "recovering from XRUN\n");
1288 else
1289 printk(KERN_DEBUG "pcm_oss: readv: "
1290 "recovering from SUSPEND\n");
1291 #endif
1292 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1293 if (ret < 0)
1294 break;
1295 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1296 ret = snd_pcm_oss_prepare(substream);
1297 if (ret < 0)
1298 break;
1299 }
1300 if (in_kernel) {
1301 mm_segment_t fs;
1302 fs = snd_enter_user();
1303 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1304 snd_leave_user(fs);
1305 } else {
1306 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1307 }
1308 if (ret != -EPIPE && ret != -ESTRPIPE)
1309 break;
1310 }
1311 return ret;
1312 }
1313
1314 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1315 {
1316 struct snd_pcm_runtime *runtime = substream->runtime;
1317 snd_pcm_sframes_t frames, frames1;
1318 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1319 if (runtime->oss.plugin_first) {
1320 struct snd_pcm_plugin_channel *channels;
1321 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1322 if (!in_kernel) {
1323 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1324 return -EFAULT;
1325 buf = runtime->oss.buffer;
1326 }
1327 frames = bytes / oss_frame_bytes;
1328 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1329 if (frames1 < 0)
1330 return frames1;
1331 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1332 if (frames1 <= 0)
1333 return frames1;
1334 bytes = frames1 * oss_frame_bytes;
1335 } else
1336 #endif
1337 {
1338 frames = bytes_to_frames(runtime, bytes);
1339 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1340 if (frames1 <= 0)
1341 return frames1;
1342 bytes = frames_to_bytes(runtime, frames1);
1343 }
1344 return bytes;
1345 }
1346
1347 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1348 {
1349 size_t xfer = 0;
1350 ssize_t tmp;
1351 struct snd_pcm_runtime *runtime = substream->runtime;
1352
1353 if (atomic_read(&substream->mmap_count))
1354 return -ENXIO;
1355
1356 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1357 return tmp;
1358 mutex_lock(&runtime->oss.params_lock);
1359 while (bytes > 0) {
1360 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1361 tmp = bytes;
1362 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1363 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1364 if (tmp > 0) {
1365 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1366 tmp = -EFAULT;
1367 goto err;
1368 }
1369 }
1370 runtime->oss.buffer_used += tmp;
1371 buf += tmp;
1372 bytes -= tmp;
1373 xfer += tmp;
1374 if (substream->oss.setup.partialfrag ||
1375 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1376 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1377 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1378 if (tmp <= 0)
1379 goto err;
1380 runtime->oss.bytes += tmp;
1381 runtime->oss.period_ptr += tmp;
1382 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1383 if (runtime->oss.period_ptr == 0 ||
1384 runtime->oss.period_ptr == runtime->oss.buffer_used)
1385 runtime->oss.buffer_used = 0;
1386 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1387 tmp = -EAGAIN;
1388 goto err;
1389 }
1390 }
1391 } else {
1392 tmp = snd_pcm_oss_write2(substream,
1393 (const char __force *)buf,
1394 runtime->oss.period_bytes, 0);
1395 if (tmp <= 0)
1396 goto err;
1397 runtime->oss.bytes += tmp;
1398 buf += tmp;
1399 bytes -= tmp;
1400 xfer += tmp;
1401 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1402 tmp != runtime->oss.period_bytes)
1403 break;
1404 }
1405 }
1406 mutex_unlock(&runtime->oss.params_lock);
1407 return xfer;
1408
1409 err:
1410 mutex_unlock(&runtime->oss.params_lock);
1411 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1412 }
1413
1414 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1415 {
1416 struct snd_pcm_runtime *runtime = substream->runtime;
1417 snd_pcm_sframes_t frames, frames1;
1418 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1419 char __user *final_dst = (char __user *)buf;
1420 if (runtime->oss.plugin_first) {
1421 struct snd_pcm_plugin_channel *channels;
1422 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1423 if (!in_kernel)
1424 buf = runtime->oss.buffer;
1425 frames = bytes / oss_frame_bytes;
1426 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1427 if (frames1 < 0)
1428 return frames1;
1429 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1430 if (frames1 <= 0)
1431 return frames1;
1432 bytes = frames1 * oss_frame_bytes;
1433 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1434 return -EFAULT;
1435 } else
1436 #endif
1437 {
1438 frames = bytes_to_frames(runtime, bytes);
1439 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1440 if (frames1 <= 0)
1441 return frames1;
1442 bytes = frames_to_bytes(runtime, frames1);
1443 }
1444 return bytes;
1445 }
1446
1447 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1448 {
1449 size_t xfer = 0;
1450 ssize_t tmp;
1451 struct snd_pcm_runtime *runtime = substream->runtime;
1452
1453 if (atomic_read(&substream->mmap_count))
1454 return -ENXIO;
1455
1456 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1457 return tmp;
1458 mutex_lock(&runtime->oss.params_lock);
1459 while (bytes > 0) {
1460 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1461 if (runtime->oss.buffer_used == 0) {
1462 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1463 if (tmp <= 0)
1464 goto err;
1465 runtime->oss.bytes += tmp;
1466 runtime->oss.period_ptr = tmp;
1467 runtime->oss.buffer_used = tmp;
1468 }
1469 tmp = bytes;
1470 if ((size_t) tmp > runtime->oss.buffer_used)
1471 tmp = runtime->oss.buffer_used;
1472 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1473 tmp = -EFAULT;
1474 goto err;
1475 }
1476 buf += tmp;
1477 bytes -= tmp;
1478 xfer += tmp;
1479 runtime->oss.buffer_used -= tmp;
1480 } else {
1481 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1482 runtime->oss.period_bytes, 0);
1483 if (tmp <= 0)
1484 goto err;
1485 runtime->oss.bytes += tmp;
1486 buf += tmp;
1487 bytes -= tmp;
1488 xfer += tmp;
1489 }
1490 }
1491 mutex_unlock(&runtime->oss.params_lock);
1492 return xfer;
1493
1494 err:
1495 mutex_unlock(&runtime->oss.params_lock);
1496 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1497 }
1498
1499 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1500 {
1501 struct snd_pcm_substream *substream;
1502
1503 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1504 if (substream != NULL) {
1505 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1506 substream->runtime->oss.prepare = 1;
1507 }
1508 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1509 if (substream != NULL) {
1510 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1511 substream->runtime->oss.prepare = 1;
1512 }
1513 return 0;
1514 }
1515
1516 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1517 {
1518 struct snd_pcm_substream *substream;
1519 int err;
1520
1521 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1522 if (substream != NULL) {
1523 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1524 return err;
1525 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1526 }
1527 /* note: all errors from the start action are ignored */
1528 /* OSS apps do not know, how to handle them */
1529 return 0;
1530 }
1531
1532 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1533 {
1534 struct snd_pcm_runtime *runtime;
1535 ssize_t result = 0;
1536 long res;
1537 wait_queue_t wait;
1538
1539 runtime = substream->runtime;
1540 init_waitqueue_entry(&wait, current);
1541 add_wait_queue(&runtime->sleep, &wait);
1542 #ifdef OSS_DEBUG
1543 printk(KERN_DEBUG "sync1: size = %li\n", size);
1544 #endif
1545 while (1) {
1546 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1547 if (result > 0) {
1548 runtime->oss.buffer_used = 0;
1549 result = 0;
1550 break;
1551 }
1552 if (result != 0 && result != -EAGAIN)
1553 break;
1554 result = 0;
1555 set_current_state(TASK_INTERRUPTIBLE);
1556 snd_pcm_stream_lock_irq(substream);
1557 res = runtime->status->state;
1558 snd_pcm_stream_unlock_irq(substream);
1559 if (res != SNDRV_PCM_STATE_RUNNING) {
1560 set_current_state(TASK_RUNNING);
1561 break;
1562 }
1563 res = schedule_timeout(10 * HZ);
1564 if (signal_pending(current)) {
1565 result = -ERESTARTSYS;
1566 break;
1567 }
1568 if (res == 0) {
1569 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1570 result = -EIO;
1571 break;
1572 }
1573 }
1574 remove_wait_queue(&runtime->sleep, &wait);
1575 return result;
1576 }
1577
1578 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1579 {
1580 int err = 0;
1581 unsigned int saved_f_flags;
1582 struct snd_pcm_substream *substream;
1583 struct snd_pcm_runtime *runtime;
1584 snd_pcm_format_t format;
1585 unsigned long width;
1586 size_t size;
1587
1588 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1589 if (substream != NULL) {
1590 runtime = substream->runtime;
1591 if (atomic_read(&substream->mmap_count))
1592 goto __direct;
1593 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1594 return err;
1595 format = snd_pcm_oss_format_from(runtime->oss.format);
1596 width = snd_pcm_format_physical_width(format);
1597 mutex_lock(&runtime->oss.params_lock);
1598 if (runtime->oss.buffer_used > 0) {
1599 #ifdef OSS_DEBUG
1600 printk(KERN_DEBUG "sync: buffer_used\n");
1601 #endif
1602 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1603 snd_pcm_format_set_silence(format,
1604 runtime->oss.buffer + runtime->oss.buffer_used,
1605 size);
1606 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1607 if (err < 0) {
1608 mutex_unlock(&runtime->oss.params_lock);
1609 return err;
1610 }
1611 } else if (runtime->oss.period_ptr > 0) {
1612 #ifdef OSS_DEBUG
1613 printk(KERN_DEBUG "sync: period_ptr\n");
1614 #endif
1615 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1616 snd_pcm_format_set_silence(format,
1617 runtime->oss.buffer,
1618 size * 8 / width);
1619 err = snd_pcm_oss_sync1(substream, size);
1620 if (err < 0) {
1621 mutex_unlock(&runtime->oss.params_lock);
1622 return err;
1623 }
1624 }
1625 /*
1626 * The ALSA's period might be a bit large than OSS one.
1627 * Fill the remain portion of ALSA period with zeros.
1628 */
1629 size = runtime->control->appl_ptr % runtime->period_size;
1630 if (size > 0) {
1631 size = runtime->period_size - size;
1632 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1633 size = (runtime->frame_bits * size) / 8;
1634 while (size > 0) {
1635 mm_segment_t fs;
1636 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1637 size -= size1;
1638 size1 *= 8;
1639 size1 /= runtime->sample_bits;
1640 snd_pcm_format_set_silence(runtime->format,
1641 runtime->oss.buffer,
1642 size1);
1643 size1 /= runtime->channels; /* frames */
1644 fs = snd_enter_user();
1645 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1646 snd_leave_user(fs);
1647 }
1648 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1649 void __user *buffers[runtime->channels];
1650 memset(buffers, 0, runtime->channels * sizeof(void *));
1651 snd_pcm_lib_writev(substream, buffers, size);
1652 }
1653 }
1654 mutex_unlock(&runtime->oss.params_lock);
1655 /*
1656 * finish sync: drain the buffer
1657 */
1658 __direct:
1659 saved_f_flags = substream->f_flags;
1660 substream->f_flags &= ~O_NONBLOCK;
1661 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1662 substream->f_flags = saved_f_flags;
1663 if (err < 0)
1664 return err;
1665 runtime->oss.prepare = 1;
1666 }
1667
1668 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1669 if (substream != NULL) {
1670 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1671 return err;
1672 runtime = substream->runtime;
1673 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1674 if (err < 0)
1675 return err;
1676 runtime->oss.buffer_used = 0;
1677 runtime->oss.prepare = 1;
1678 }
1679 return 0;
1680 }
1681
1682 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1683 {
1684 int idx;
1685
1686 for (idx = 1; idx >= 0; --idx) {
1687 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1688 struct snd_pcm_runtime *runtime;
1689 if (substream == NULL)
1690 continue;
1691 runtime = substream->runtime;
1692 if (rate < 1000)
1693 rate = 1000;
1694 else if (rate > 192000)
1695 rate = 192000;
1696 if (runtime->oss.rate != rate) {
1697 runtime->oss.params = 1;
1698 runtime->oss.rate = rate;
1699 }
1700 }
1701 return snd_pcm_oss_get_rate(pcm_oss_file);
1702 }
1703
1704 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1705 {
1706 struct snd_pcm_substream *substream;
1707 int err;
1708
1709 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1710 return err;
1711 return substream->runtime->oss.rate;
1712 }
1713
1714 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1715 {
1716 int idx;
1717 if (channels < 1)
1718 channels = 1;
1719 if (channels > 128)
1720 return -EINVAL;
1721 for (idx = 1; idx >= 0; --idx) {
1722 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1723 struct snd_pcm_runtime *runtime;
1724 if (substream == NULL)
1725 continue;
1726 runtime = substream->runtime;
1727 if (runtime->oss.channels != channels) {
1728 runtime->oss.params = 1;
1729 runtime->oss.channels = channels;
1730 }
1731 }
1732 return snd_pcm_oss_get_channels(pcm_oss_file);
1733 }
1734
1735 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1736 {
1737 struct snd_pcm_substream *substream;
1738 int err;
1739
1740 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1741 return err;
1742 return substream->runtime->oss.channels;
1743 }
1744
1745 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1746 {
1747 struct snd_pcm_substream *substream;
1748 int err;
1749
1750 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1751 return err;
1752 return substream->runtime->oss.period_bytes;
1753 }
1754
1755 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1756 {
1757 struct snd_pcm_substream *substream;
1758 int err;
1759 int direct;
1760 struct snd_pcm_hw_params *params;
1761 unsigned int formats = 0;
1762 struct snd_mask format_mask;
1763 int fmt;
1764
1765 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1766 return err;
1767 if (atomic_read(&substream->mmap_count))
1768 direct = 1;
1769 else
1770 direct = substream->oss.setup.direct;
1771 if (!direct)
1772 return AFMT_MU_LAW | AFMT_U8 |
1773 AFMT_S16_LE | AFMT_S16_BE |
1774 AFMT_S8 | AFMT_U16_LE |
1775 AFMT_U16_BE |
1776 AFMT_S32_LE | AFMT_S32_BE |
1777 AFMT_S24_LE | AFMT_S24_BE |
1778 AFMT_S24_PACKED;
1779 params = kmalloc(sizeof(*params), GFP_KERNEL);
1780 if (!params)
1781 return -ENOMEM;
1782 _snd_pcm_hw_params_any(params);
1783 err = snd_pcm_hw_refine(substream, params);
1784 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1785 kfree(params);
1786 if (err < 0)
1787 return err;
1788 for (fmt = 0; fmt < 32; ++fmt) {
1789 if (snd_mask_test(&format_mask, fmt)) {
1790 int f = snd_pcm_oss_format_to(fmt);
1791 if (f >= 0)
1792 formats |= f;
1793 }
1794 }
1795 return formats;
1796 }
1797
1798 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1799 {
1800 int formats, idx;
1801
1802 if (format != AFMT_QUERY) {
1803 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1804 if (formats < 0)
1805 return formats;
1806 if (!(formats & format))
1807 format = AFMT_U8;
1808 for (idx = 1; idx >= 0; --idx) {
1809 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1810 struct snd_pcm_runtime *runtime;
1811 if (substream == NULL)
1812 continue;
1813 runtime = substream->runtime;
1814 if (runtime->oss.format != format) {
1815 runtime->oss.params = 1;
1816 runtime->oss.format = format;
1817 }
1818 }
1819 }
1820 return snd_pcm_oss_get_format(pcm_oss_file);
1821 }
1822
1823 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1824 {
1825 struct snd_pcm_substream *substream;
1826 int err;
1827
1828 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1829 return err;
1830 return substream->runtime->oss.format;
1831 }
1832
1833 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1834 {
1835 struct snd_pcm_runtime *runtime;
1836
1837 if (substream == NULL)
1838 return 0;
1839 runtime = substream->runtime;
1840 if (subdivide == 0) {
1841 subdivide = runtime->oss.subdivision;
1842 if (subdivide == 0)
1843 subdivide = 1;
1844 return subdivide;
1845 }
1846 if (runtime->oss.subdivision || runtime->oss.fragshift)
1847 return -EINVAL;
1848 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1849 subdivide != 8 && subdivide != 16)
1850 return -EINVAL;
1851 runtime->oss.subdivision = subdivide;
1852 runtime->oss.params = 1;
1853 return subdivide;
1854 }
1855
1856 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1857 {
1858 int err = -EINVAL, idx;
1859
1860 for (idx = 1; idx >= 0; --idx) {
1861 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1862 if (substream == NULL)
1863 continue;
1864 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1865 return err;
1866 }
1867 return err;
1868 }
1869
1870 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1871 {
1872 struct snd_pcm_runtime *runtime;
1873
1874 if (substream == NULL)
1875 return 0;
1876 runtime = substream->runtime;
1877 if (runtime->oss.subdivision || runtime->oss.fragshift)
1878 return -EINVAL;
1879 runtime->oss.fragshift = val & 0xffff;
1880 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1881 if (runtime->oss.fragshift < 4) /* < 16 */
1882 runtime->oss.fragshift = 4;
1883 if (runtime->oss.maxfrags < 2)
1884 runtime->oss.maxfrags = 2;
1885 runtime->oss.params = 1;
1886 return 0;
1887 }
1888
1889 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1890 {
1891 int err = -EINVAL, idx;
1892
1893 for (idx = 1; idx >= 0; --idx) {
1894 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1895 if (substream == NULL)
1896 continue;
1897 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1898 return err;
1899 }
1900 return err;
1901 }
1902
1903 static int snd_pcm_oss_nonblock(struct file * file)
1904 {
1905 spin_lock(&file->f_lock);
1906 file->f_flags |= O_NONBLOCK;
1907 spin_unlock(&file->f_lock);
1908 return 0;
1909 }
1910
1911 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1912 {
1913
1914 if (substream == NULL) {
1915 res &= ~DSP_CAP_DUPLEX;
1916 return res;
1917 }
1918 #ifdef DSP_CAP_MULTI
1919 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1920 if (substream->pstr->substream_count > 1)
1921 res |= DSP_CAP_MULTI;
1922 #endif
1923 /* DSP_CAP_REALTIME is set all times: */
1924 /* all ALSA drivers can return actual pointer in ring buffer */
1925 #if defined(DSP_CAP_REALTIME) && 0
1926 {
1927 struct snd_pcm_runtime *runtime = substream->runtime;
1928 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1929 res &= ~DSP_CAP_REALTIME;
1930 }
1931 #endif
1932 return res;
1933 }
1934
1935 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1936 {
1937 int result, idx;
1938
1939 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1940 for (idx = 0; idx < 2; idx++) {
1941 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1942 result = snd_pcm_oss_get_caps1(substream, result);
1943 }
1944 result |= 0x0001; /* revision - same as SB AWE 64 */
1945 return result;
1946 }
1947
1948 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1949 {
1950 struct snd_pcm_runtime *runtime = substream->runtime;
1951 snd_pcm_uframes_t appl_ptr;
1952 appl_ptr = hw_ptr + runtime->buffer_size;
1953 appl_ptr %= runtime->boundary;
1954 runtime->control->appl_ptr = appl_ptr;
1955 }
1956
1957 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1958 {
1959 struct snd_pcm_runtime *runtime;
1960 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1961 int err, cmd;
1962
1963 #ifdef OSS_DEBUG
1964 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1965 #endif
1966
1967 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1968 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1969
1970 if (psubstream) {
1971 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1972 return err;
1973 }
1974 if (csubstream) {
1975 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1976 return err;
1977 }
1978 if (psubstream) {
1979 runtime = psubstream->runtime;
1980 if (trigger & PCM_ENABLE_OUTPUT) {
1981 if (runtime->oss.trigger)
1982 goto _skip1;
1983 if (atomic_read(&psubstream->mmap_count))
1984 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1985 runtime->oss.trigger = 1;
1986 runtime->start_threshold = 1;
1987 cmd = SNDRV_PCM_IOCTL_START;
1988 } else {
1989 if (!runtime->oss.trigger)
1990 goto _skip1;
1991 runtime->oss.trigger = 0;
1992 runtime->start_threshold = runtime->boundary;
1993 cmd = SNDRV_PCM_IOCTL_DROP;
1994 runtime->oss.prepare = 1;
1995 }
1996 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1997 if (err < 0)
1998 return err;
1999 }
2000 _skip1:
2001 if (csubstream) {
2002 runtime = csubstream->runtime;
2003 if (trigger & PCM_ENABLE_INPUT) {
2004 if (runtime->oss.trigger)
2005 goto _skip2;
2006 runtime->oss.trigger = 1;
2007 runtime->start_threshold = 1;
2008 cmd = SNDRV_PCM_IOCTL_START;
2009 } else {
2010 if (!runtime->oss.trigger)
2011 goto _skip2;
2012 runtime->oss.trigger = 0;
2013 runtime->start_threshold = runtime->boundary;
2014 cmd = SNDRV_PCM_IOCTL_DROP;
2015 runtime->oss.prepare = 1;
2016 }
2017 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2018 if (err < 0)
2019 return err;
2020 }
2021 _skip2:
2022 return 0;
2023 }
2024
2025 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2026 {
2027 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2028 int result = 0;
2029
2030 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2031 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2032 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2033 result |= PCM_ENABLE_OUTPUT;
2034 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2035 result |= PCM_ENABLE_INPUT;
2036 return result;
2037 }
2038
2039 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2040 {
2041 struct snd_pcm_substream *substream;
2042 struct snd_pcm_runtime *runtime;
2043 snd_pcm_sframes_t delay;
2044 int err;
2045
2046 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2047 if (substream == NULL)
2048 return -EINVAL;
2049 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2050 return err;
2051 runtime = substream->runtime;
2052 if (runtime->oss.params || runtime->oss.prepare)
2053 return 0;
2054 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2055 if (err == -EPIPE)
2056 delay = 0; /* hack for broken OSS applications */
2057 else if (err < 0)
2058 return err;
2059 return snd_pcm_oss_bytes(substream, delay);
2060 }
2061
2062 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2063 {
2064 struct snd_pcm_substream *substream;
2065 struct snd_pcm_runtime *runtime;
2066 snd_pcm_sframes_t delay;
2067 int fixup;
2068 struct count_info info;
2069 int err;
2070
2071 if (_info == NULL)
2072 return -EFAULT;
2073 substream = pcm_oss_file->streams[stream];
2074 if (substream == NULL)
2075 return -EINVAL;
2076 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2077 return err;
2078 runtime = substream->runtime;
2079 if (runtime->oss.params || runtime->oss.prepare) {
2080 memset(&info, 0, sizeof(info));
2081 if (copy_to_user(_info, &info, sizeof(info)))
2082 return -EFAULT;
2083 return 0;
2084 }
2085 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2086 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2087 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2088 err = 0;
2089 delay = 0;
2090 fixup = 0;
2091 } else {
2092 fixup = runtime->oss.buffer_used;
2093 }
2094 } else {
2095 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2096 fixup = -runtime->oss.buffer_used;
2097 }
2098 if (err < 0)
2099 return err;
2100 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2101 if (atomic_read(&substream->mmap_count)) {
2102 snd_pcm_sframes_t n;
2103 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2104 if (n < 0)
2105 n += runtime->boundary;
2106 info.blocks = n / runtime->period_size;
2107 runtime->oss.prev_hw_ptr_interrupt = delay;
2108 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2109 snd_pcm_oss_simulate_fill(substream, delay);
2110 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2111 } else {
2112 delay = snd_pcm_oss_bytes(substream, delay);
2113 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2114 if (substream->oss.setup.buggyptr)
2115 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2116 else
2117 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2118 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2119 } else {
2120 delay += fixup;
2121 info.blocks = delay / runtime->oss.period_bytes;
2122 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2123 }
2124 }
2125 if (copy_to_user(_info, &info, sizeof(info)))
2126 return -EFAULT;
2127 return 0;
2128 }
2129
2130 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2131 {
2132 struct snd_pcm_substream *substream;
2133 struct snd_pcm_runtime *runtime;
2134 snd_pcm_sframes_t avail;
2135 int fixup;
2136 struct audio_buf_info info;
2137 int err;
2138
2139 if (_info == NULL)
2140 return -EFAULT;
2141 substream = pcm_oss_file->streams[stream];
2142 if (substream == NULL)
2143 return -EINVAL;
2144 runtime = substream->runtime;
2145
2146 if (runtime->oss.params &&
2147 (err = snd_pcm_oss_change_params(substream)) < 0)
2148 return err;
2149
2150 info.fragsize = runtime->oss.period_bytes;
2151 info.fragstotal = runtime->periods;
2152 if (runtime->oss.prepare) {
2153 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2154 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2155 info.fragments = runtime->oss.periods;
2156 } else {
2157 info.bytes = 0;
2158 info.fragments = 0;
2159 }
2160 } else {
2161 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2162 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2163 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2164 avail = runtime->buffer_size;
2165 err = 0;
2166 fixup = 0;
2167 } else {
2168 avail = runtime->buffer_size - avail;
2169 fixup = -runtime->oss.buffer_used;
2170 }
2171 } else {
2172 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2173 fixup = runtime->oss.buffer_used;
2174 }
2175 if (err < 0)
2176 return err;
2177 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2178 info.fragments = info.bytes / runtime->oss.period_bytes;
2179 }
2180
2181 #ifdef OSS_DEBUG
2182 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2183 "fragstotal = %i, fragsize = %i\n",
2184 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2185 #endif
2186 if (copy_to_user(_info, &info, sizeof(info)))
2187 return -EFAULT;
2188 return 0;
2189 }
2190
2191 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2192 {
2193 // it won't be probably implemented
2194 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2195 return -EINVAL;
2196 }
2197
2198 static const char *strip_task_path(const char *path)
2199 {
2200 const char *ptr, *ptrl = NULL;
2201 for (ptr = path; *ptr; ptr++) {
2202 if (*ptr == '/')
2203 ptrl = ptr + 1;
2204 }
2205 return ptrl;
2206 }
2207
2208 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2209 const char *task_name,
2210 struct snd_pcm_oss_setup *rsetup)
2211 {
2212 struct snd_pcm_oss_setup *setup;
2213
2214 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2215 do {
2216 for (setup = pcm->streams[stream].oss.setup_list; setup;
2217 setup = setup->next) {
2218 if (!strcmp(setup->task_name, task_name))
2219 goto out;
2220 }
2221 } while ((task_name = strip_task_path(task_name)) != NULL);
2222 out:
2223 if (setup)
2224 *rsetup = *setup;
2225 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2226 }
2227
2228 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2229 {
2230 struct snd_pcm_runtime *runtime;
2231 runtime = substream->runtime;
2232 vfree(runtime->oss.buffer);
2233 runtime->oss.buffer = NULL;
2234 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2235 snd_pcm_oss_plugin_clear(substream);
2236 #endif
2237 substream->oss.oss = 0;
2238 }
2239
2240 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2241 struct snd_pcm_oss_setup *setup,
2242 int minor)
2243 {
2244 struct snd_pcm_runtime *runtime;
2245
2246 substream->oss.oss = 1;
2247 substream->oss.setup = *setup;
2248 if (setup->nonblock)
2249 substream->f_flags |= O_NONBLOCK;
2250 else if (setup->block)
2251 substream->f_flags &= ~O_NONBLOCK;
2252 runtime = substream->runtime;
2253 runtime->oss.params = 1;
2254 runtime->oss.trigger = 1;
2255 runtime->oss.rate = 8000;
2256 mutex_init(&runtime->oss.params_lock);
2257 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2258 case SNDRV_MINOR_OSS_PCM_8:
2259 runtime->oss.format = AFMT_U8;
2260 break;
2261 case SNDRV_MINOR_OSS_PCM_16:
2262 runtime->oss.format = AFMT_S16_LE;
2263 break;
2264 default:
2265 runtime->oss.format = AFMT_MU_LAW;
2266 }
2267 runtime->oss.channels = 1;
2268 runtime->oss.fragshift = 0;
2269 runtime->oss.maxfrags = 0;
2270 runtime->oss.subdivision = 0;
2271 substream->pcm_release = snd_pcm_oss_release_substream;
2272 }
2273
2274 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2275 {
2276 int cidx;
2277 if (!pcm_oss_file)
2278 return 0;
2279 for (cidx = 0; cidx < 2; ++cidx) {
2280 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2281 if (substream)
2282 snd_pcm_release_substream(substream);
2283 }
2284 kfree(pcm_oss_file);
2285 return 0;
2286 }
2287
2288 static int snd_pcm_oss_open_file(struct file *file,
2289 struct snd_pcm *pcm,
2290 struct snd_pcm_oss_file **rpcm_oss_file,
2291 int minor,
2292 struct snd_pcm_oss_setup *setup)
2293 {
2294 int idx, err;
2295 struct snd_pcm_oss_file *pcm_oss_file;
2296 struct snd_pcm_substream *substream;
2297 fmode_t f_mode = file->f_mode;
2298
2299 if (rpcm_oss_file)
2300 *rpcm_oss_file = NULL;
2301
2302 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2303 if (pcm_oss_file == NULL)
2304 return -ENOMEM;
2305
2306 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2307 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2308 f_mode = FMODE_WRITE;
2309
2310 file->f_flags &= ~O_APPEND;
2311 for (idx = 0; idx < 2; idx++) {
2312 if (setup[idx].disable)
2313 continue;
2314 if (! pcm->streams[idx].substream_count)
2315 continue; /* no matching substream */
2316 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2317 if (! (f_mode & FMODE_WRITE))
2318 continue;
2319 } else {
2320 if (! (f_mode & FMODE_READ))
2321 continue;
2322 }
2323 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2324 if (err < 0) {
2325 snd_pcm_oss_release_file(pcm_oss_file);
2326 return err;
2327 }
2328
2329 pcm_oss_file->streams[idx] = substream;
2330 substream->file = pcm_oss_file;
2331 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2332 }
2333
2334 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2335 snd_pcm_oss_release_file(pcm_oss_file);
2336 return -EINVAL;
2337 }
2338
2339 file->private_data = pcm_oss_file;
2340 if (rpcm_oss_file)
2341 *rpcm_oss_file = pcm_oss_file;
2342 return 0;
2343 }
2344
2345
2346 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2347 {
2348 unsigned int idx;
2349
2350 if (snd_BUG_ON(!task || !name || size < 2))
2351 return -EINVAL;
2352 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2353 name[idx] = task->comm[idx];
2354 name[idx] = '\0';
2355 return 0;
2356 }
2357
2358 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2359 {
2360 int err;
2361 char task_name[32];
2362 struct snd_pcm *pcm;
2363 struct snd_pcm_oss_file *pcm_oss_file;
2364 struct snd_pcm_oss_setup setup[2];
2365 int nonblock;
2366 wait_queue_t wait;
2367
2368 pcm = snd_lookup_oss_minor_data(iminor(inode),
2369 SNDRV_OSS_DEVICE_TYPE_PCM);
2370 if (pcm == NULL) {
2371 err = -ENODEV;
2372 goto __error1;
2373 }
2374 err = snd_card_file_add(pcm->card, file);
2375 if (err < 0)
2376 goto __error1;
2377 if (!try_module_get(pcm->card->module)) {
2378 err = -EFAULT;
2379 goto __error2;
2380 }
2381 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2382 err = -EFAULT;
2383 goto __error;
2384 }
2385 memset(setup, 0, sizeof(setup));
2386 if (file->f_mode & FMODE_WRITE)
2387 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2388 task_name, &setup[0]);
2389 if (file->f_mode & FMODE_READ)
2390 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2391 task_name, &setup[1]);
2392
2393 nonblock = !!(file->f_flags & O_NONBLOCK);
2394 if (!nonblock)
2395 nonblock = nonblock_open;
2396
2397 init_waitqueue_entry(&wait, current);
2398 add_wait_queue(&pcm->open_wait, &wait);
2399 mutex_lock(&pcm->open_mutex);
2400 while (1) {
2401 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2402 iminor(inode), setup);
2403 if (err >= 0)
2404 break;
2405 if (err == -EAGAIN) {
2406 if (nonblock) {
2407 err = -EBUSY;
2408 break;
2409 }
2410 } else
2411 break;
2412 set_current_state(TASK_INTERRUPTIBLE);
2413 mutex_unlock(&pcm->open_mutex);
2414 schedule();
2415 mutex_lock(&pcm->open_mutex);
2416 if (signal_pending(current)) {
2417 err = -ERESTARTSYS;
2418 break;
2419 }
2420 }
2421 remove_wait_queue(&pcm->open_wait, &wait);
2422 mutex_unlock(&pcm->open_mutex);
2423 if (err < 0)
2424 goto __error;
2425 return err;
2426
2427 __error:
2428 module_put(pcm->card->module);
2429 __error2:
2430 snd_card_file_remove(pcm->card, file);
2431 __error1:
2432 return err;
2433 }
2434
2435 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2436 {
2437 struct snd_pcm *pcm;
2438 struct snd_pcm_substream *substream;
2439 struct snd_pcm_oss_file *pcm_oss_file;
2440
2441 pcm_oss_file = file->private_data;
2442 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2443 if (substream == NULL)
2444 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2445 if (snd_BUG_ON(!substream))
2446 return -ENXIO;
2447 pcm = substream->pcm;
2448 if (!pcm->card->shutdown)
2449 snd_pcm_oss_sync(pcm_oss_file);
2450 mutex_lock(&pcm->open_mutex);
2451 snd_pcm_oss_release_file(pcm_oss_file);
2452 mutex_unlock(&pcm->open_mutex);
2453 wake_up(&pcm->open_wait);
2454 module_put(pcm->card->module);
2455 snd_card_file_remove(pcm->card, file);
2456 return 0;
2457 }
2458
2459 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2460 {
2461 struct snd_pcm_oss_file *pcm_oss_file;
2462 int __user *p = (int __user *)arg;
2463 int res;
2464
2465 pcm_oss_file = file->private_data;
2466 if (cmd == OSS_GETVERSION)
2467 return put_user(SNDRV_OSS_VERSION, p);
2468 if (cmd == OSS_ALSAEMULVER)
2469 return put_user(1, p);
2470 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2471 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2472 struct snd_pcm_substream *substream;
2473 int idx;
2474 for (idx = 0; idx < 2; ++idx) {
2475 substream = pcm_oss_file->streams[idx];
2476 if (substream != NULL)
2477 break;
2478 }
2479 if (snd_BUG_ON(idx >= 2))
2480 return -ENXIO;
2481 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2482 }
2483 #endif
2484 if (((cmd >> 8) & 0xff) != 'P')
2485 return -EINVAL;
2486 #ifdef OSS_DEBUG
2487 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2488 #endif
2489 switch (cmd) {
2490 case SNDCTL_DSP_RESET:
2491 return snd_pcm_oss_reset(pcm_oss_file);
2492 case SNDCTL_DSP_SYNC:
2493 return snd_pcm_oss_sync(pcm_oss_file);
2494 case SNDCTL_DSP_SPEED:
2495 if (get_user(res, p))
2496 return -EFAULT;
2497 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2498 return res;
2499 return put_user(res, p);
2500 case SOUND_PCM_READ_RATE:
2501 res = snd_pcm_oss_get_rate(pcm_oss_file);
2502 if (res < 0)
2503 return res;
2504 return put_user(res, p);
2505 case SNDCTL_DSP_STEREO:
2506 if (get_user(res, p))
2507 return -EFAULT;
2508 res = res > 0 ? 2 : 1;
2509 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2510 return res;
2511 return put_user(--res, p);
2512 case SNDCTL_DSP_GETBLKSIZE:
2513 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2514 if (res < 0)
2515 return res;
2516 return put_user(res, p);
2517 case SNDCTL_DSP_SETFMT:
2518 if (get_user(res, p))
2519 return -EFAULT;
2520 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2521 if (res < 0)
2522 return res;
2523 return put_user(res, p);
2524 case SOUND_PCM_READ_BITS:
2525 res = snd_pcm_oss_get_format(pcm_oss_file);
2526 if (res < 0)
2527 return res;
2528 return put_user(res, p);
2529 case SNDCTL_DSP_CHANNELS:
2530 if (get_user(res, p))
2531 return -EFAULT;
2532 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2533 if (res < 0)
2534 return res;
2535 return put_user(res, p);
2536 case SOUND_PCM_READ_CHANNELS:
2537 res = snd_pcm_oss_get_channels(pcm_oss_file);
2538 if (res < 0)
2539 return res;
2540 return put_user(res, p);
2541 case SOUND_PCM_WRITE_FILTER:
2542 case SOUND_PCM_READ_FILTER:
2543 return -EIO;
2544 case SNDCTL_DSP_POST:
2545 return snd_pcm_oss_post(pcm_oss_file);
2546 case SNDCTL_DSP_SUBDIVIDE:
2547 if (get_user(res, p))
2548 return -EFAULT;
2549 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2550 if (res < 0)
2551 return res;
2552 return put_user(res, p);
2553 case SNDCTL_DSP_SETFRAGMENT:
2554 if (get_user(res, p))
2555 return -EFAULT;
2556 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2557 case SNDCTL_DSP_GETFMTS:
2558 res = snd_pcm_oss_get_formats(pcm_oss_file);
2559 if (res < 0)
2560 return res;
2561 return put_user(res, p);
2562 case SNDCTL_DSP_GETOSPACE:
2563 case SNDCTL_DSP_GETISPACE:
2564 return snd_pcm_oss_get_space(pcm_oss_file,
2565 cmd == SNDCTL_DSP_GETISPACE ?
2566 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2567 (struct audio_buf_info __user *) arg);
2568 case SNDCTL_DSP_NONBLOCK:
2569 return snd_pcm_oss_nonblock(file);
2570 case SNDCTL_DSP_GETCAPS:
2571 res = snd_pcm_oss_get_caps(pcm_oss_file);
2572 if (res < 0)
2573 return res;
2574 return put_user(res, p);
2575 case SNDCTL_DSP_GETTRIGGER:
2576 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2577 if (res < 0)
2578 return res;
2579 return put_user(res, p);
2580 case SNDCTL_DSP_SETTRIGGER:
2581 if (get_user(res, p))
2582 return -EFAULT;
2583 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2584 case SNDCTL_DSP_GETIPTR:
2585 case SNDCTL_DSP_GETOPTR:
2586 return snd_pcm_oss_get_ptr(pcm_oss_file,
2587 cmd == SNDCTL_DSP_GETIPTR ?
2588 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2589 (struct count_info __user *) arg);
2590 case SNDCTL_DSP_MAPINBUF:
2591 case SNDCTL_DSP_MAPOUTBUF:
2592 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2593 cmd == SNDCTL_DSP_MAPINBUF ?
2594 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2595 (struct buffmem_desc __user *) arg);
2596 case SNDCTL_DSP_SETSYNCRO:
2597 /* stop DMA now.. */
2598 return 0;
2599 case SNDCTL_DSP_SETDUPLEX:
2600 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2601 return 0;
2602 return -EIO;
2603 case SNDCTL_DSP_GETODELAY:
2604 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2605 if (res < 0) {
2606 /* it's for sure, some broken apps don't check for error codes */
2607 put_user(0, p);
2608 return res;
2609 }
2610 return put_user(res, p);
2611 case SNDCTL_DSP_PROFILE:
2612 return 0; /* silently ignore */
2613 default:
2614 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2615 }
2616 return -EINVAL;
2617 }
2618
2619 #ifdef CONFIG_COMPAT
2620 /* all compatible */
2621 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2622 #else
2623 #define snd_pcm_oss_ioctl_compat NULL
2624 #endif
2625
2626 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2627 {
2628 struct snd_pcm_oss_file *pcm_oss_file;
2629 struct snd_pcm_substream *substream;
2630
2631 pcm_oss_file = file->private_data;
2632 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2633 if (substream == NULL)
2634 return -ENXIO;
2635 substream->f_flags = file->f_flags & O_NONBLOCK;
2636 #ifndef OSS_DEBUG
2637 return snd_pcm_oss_read1(substream, buf, count);
2638 #else
2639 {
2640 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2641 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2642 "(returned %li bytes)\n", (long)count, (long)res);
2643 return res;
2644 }
2645 #endif
2646 }
2647
2648 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2649 {
2650 struct snd_pcm_oss_file *pcm_oss_file;
2651 struct snd_pcm_substream *substream;
2652 long result;
2653
2654 pcm_oss_file = file->private_data;
2655 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2656 if (substream == NULL)
2657 return -ENXIO;
2658 substream->f_flags = file->f_flags & O_NONBLOCK;
2659 result = snd_pcm_oss_write1(substream, buf, count);
2660 #ifdef OSS_DEBUG
2661 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2662 (long)count, (long)result);
2663 #endif
2664 return result;
2665 }
2666
2667 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2668 {
2669 struct snd_pcm_runtime *runtime = substream->runtime;
2670 if (atomic_read(&substream->mmap_count))
2671 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2672 else
2673 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2674 }
2675
2676 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2677 {
2678 struct snd_pcm_runtime *runtime = substream->runtime;
2679 if (atomic_read(&substream->mmap_count))
2680 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2681 else
2682 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2683 }
2684
2685 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2686 {
2687 struct snd_pcm_oss_file *pcm_oss_file;
2688 unsigned int mask;
2689 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2690
2691 pcm_oss_file = file->private_data;
2692
2693 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2694 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2695
2696 mask = 0;
2697 if (psubstream != NULL) {
2698 struct snd_pcm_runtime *runtime = psubstream->runtime;
2699 poll_wait(file, &runtime->sleep, wait);
2700 snd_pcm_stream_lock_irq(psubstream);
2701 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2702 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2703 snd_pcm_oss_playback_ready(psubstream)))
2704 mask |= POLLOUT | POLLWRNORM;
2705 snd_pcm_stream_unlock_irq(psubstream);
2706 }
2707 if (csubstream != NULL) {
2708 struct snd_pcm_runtime *runtime = csubstream->runtime;
2709 snd_pcm_state_t ostate;
2710 poll_wait(file, &runtime->sleep, wait);
2711 snd_pcm_stream_lock_irq(csubstream);
2712 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2713 snd_pcm_oss_capture_ready(csubstream))
2714 mask |= POLLIN | POLLRDNORM;
2715 snd_pcm_stream_unlock_irq(csubstream);
2716 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2717 struct snd_pcm_oss_file ofile;
2718 memset(&ofile, 0, sizeof(ofile));
2719 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2720 runtime->oss.trigger = 0;
2721 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2722 }
2723 }
2724
2725 return mask;
2726 }
2727
2728 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2729 {
2730 struct snd_pcm_oss_file *pcm_oss_file;
2731 struct snd_pcm_substream *substream = NULL;
2732 struct snd_pcm_runtime *runtime;
2733 int err;
2734
2735 #ifdef OSS_DEBUG
2736 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2737 #endif
2738 pcm_oss_file = file->private_data;
2739 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2740 case VM_READ | VM_WRITE:
2741 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2742 if (substream)
2743 break;
2744 /* Fall through */
2745 case VM_READ:
2746 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2747 break;
2748 case VM_WRITE:
2749 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2750 break;
2751 default:
2752 return -EINVAL;
2753 }
2754 /* set VM_READ access as well to fix memset() routines that do
2755 reads before writes (to improve performance) */
2756 area->vm_flags |= VM_READ;
2757 if (substream == NULL)
2758 return -ENXIO;
2759 runtime = substream->runtime;
2760 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2761 return -EIO;
2762 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2763 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2764 else
2765 return -EIO;
2766
2767 if (runtime->oss.params) {
2768 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2769 return err;
2770 }
2771 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2772 if (runtime->oss.plugin_first != NULL)
2773 return -EIO;
2774 #endif
2775
2776 if (area->vm_pgoff != 0)
2777 return -EINVAL;
2778
2779 err = snd_pcm_mmap_data(substream, file, area);
2780 if (err < 0)
2781 return err;
2782 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2783 runtime->silence_threshold = 0;
2784 runtime->silence_size = 0;
2785 #ifdef OSS_DEBUG
2786 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2787 runtime->oss.mmap_bytes);
2788 #endif
2789 /* In mmap mode we never stop */
2790 runtime->stop_threshold = runtime->boundary;
2791
2792 return 0;
2793 }
2794
2795 #ifdef CONFIG_SND_VERBOSE_PROCFS
2796 /*
2797 * /proc interface
2798 */
2799
2800 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2801 struct snd_info_buffer *buffer)
2802 {
2803 struct snd_pcm_str *pstr = entry->private_data;
2804 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2805 mutex_lock(&pstr->oss.setup_mutex);
2806 while (setup) {
2807 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2808 setup->task_name,
2809 setup->periods,
2810 setup->period_size,
2811 setup->disable ? " disable" : "",
2812 setup->direct ? " direct" : "",
2813 setup->block ? " block" : "",
2814 setup->nonblock ? " non-block" : "",
2815 setup->partialfrag ? " partial-frag" : "",
2816 setup->nosilence ? " no-silence" : "");
2817 setup = setup->next;
2818 }
2819 mutex_unlock(&pstr->oss.setup_mutex);
2820 }
2821
2822 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2823 {
2824 struct snd_pcm_oss_setup *setup, *setupn;
2825
2826 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2827 setup; setup = setupn) {
2828 setupn = setup->next;
2829 kfree(setup->task_name);
2830 kfree(setup);
2831 }
2832 pstr->oss.setup_list = NULL;
2833 }
2834
2835 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2836 struct snd_info_buffer *buffer)
2837 {
2838 struct snd_pcm_str *pstr = entry->private_data;
2839 char line[128], str[32], task_name[32], *ptr;
2840 int idx1;
2841 struct snd_pcm_oss_setup *setup, *setup1, template;
2842
2843 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2844 mutex_lock(&pstr->oss.setup_mutex);
2845 memset(&template, 0, sizeof(template));
2846 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2847 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2848 snd_pcm_oss_proc_free_setup_list(pstr);
2849 mutex_unlock(&pstr->oss.setup_mutex);
2850 continue;
2851 }
2852 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2853 if (!strcmp(setup->task_name, task_name)) {
2854 template = *setup;
2855 break;
2856 }
2857 }
2858 ptr = snd_info_get_str(str, ptr, sizeof(str));
2859 template.periods = simple_strtoul(str, NULL, 10);
2860 ptr = snd_info_get_str(str, ptr, sizeof(str));
2861 template.period_size = simple_strtoul(str, NULL, 10);
2862 for (idx1 = 31; idx1 >= 0; idx1--)
2863 if (template.period_size & (1 << idx1))
2864 break;
2865 for (idx1--; idx1 >= 0; idx1--)
2866 template.period_size &= ~(1 << idx1);
2867 do {
2868 ptr = snd_info_get_str(str, ptr, sizeof(str));
2869 if (!strcmp(str, "disable")) {
2870 template.disable = 1;
2871 } else if (!strcmp(str, "direct")) {
2872 template.direct = 1;
2873 } else if (!strcmp(str, "block")) {
2874 template.block = 1;
2875 } else if (!strcmp(str, "non-block")) {
2876 template.nonblock = 1;
2877 } else if (!strcmp(str, "partial-frag")) {
2878 template.partialfrag = 1;
2879 } else if (!strcmp(str, "no-silence")) {
2880 template.nosilence = 1;
2881 } else if (!strcmp(str, "buggy-ptr")) {
2882 template.buggyptr = 1;
2883 }
2884 } while (*str);
2885 if (setup == NULL) {
2886 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2887 if (! setup) {
2888 buffer->error = -ENOMEM;
2889 mutex_unlock(&pstr->oss.setup_mutex);
2890 return;
2891 }
2892 if (pstr->oss.setup_list == NULL)
2893 pstr->oss.setup_list = setup;
2894 else {
2895 for (setup1 = pstr->oss.setup_list;
2896 setup1->next; setup1 = setup1->next);
2897 setup1->next = setup;
2898 }
2899 template.task_name = kstrdup(task_name, GFP_KERNEL);
2900 if (! template.task_name) {
2901 kfree(setup);
2902 buffer->error = -ENOMEM;
2903 mutex_unlock(&pstr->oss.setup_mutex);
2904 return;
2905 }
2906 }
2907 *setup = template;
2908 mutex_unlock(&pstr->oss.setup_mutex);
2909 }
2910 }
2911
2912 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2913 {
2914 int stream;
2915 for (stream = 0; stream < 2; ++stream) {
2916 struct snd_info_entry *entry;
2917 struct snd_pcm_str *pstr = &pcm->streams[stream];
2918 if (pstr->substream_count == 0)
2919 continue;
2920 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2921 entry->content = SNDRV_INFO_CONTENT_TEXT;
2922 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2923 entry->c.text.read = snd_pcm_oss_proc_read;
2924 entry->c.text.write = snd_pcm_oss_proc_write;
2925 entry->private_data = pstr;
2926 if (snd_info_register(entry) < 0) {
2927 snd_info_free_entry(entry);
2928 entry = NULL;
2929 }
2930 }
2931 pstr->oss.proc_entry = entry;
2932 }
2933 }
2934
2935 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2936 {
2937 int stream;
2938 for (stream = 0; stream < 2; ++stream) {
2939 struct snd_pcm_str *pstr = &pcm->streams[stream];
2940 snd_info_free_entry(pstr->oss.proc_entry);
2941 pstr->oss.proc_entry = NULL;
2942 snd_pcm_oss_proc_free_setup_list(pstr);
2943 }
2944 }
2945 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2946 #define snd_pcm_oss_proc_init(pcm)
2947 #define snd_pcm_oss_proc_done(pcm)
2948 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2949
2950 /*
2951 * ENTRY functions
2952 */
2953
2954 static const struct file_operations snd_pcm_oss_f_reg =
2955 {
2956 .owner = THIS_MODULE,
2957 .read = snd_pcm_oss_read,
2958 .write = snd_pcm_oss_write,
2959 .open = snd_pcm_oss_open,
2960 .release = snd_pcm_oss_release,
2961 .poll = snd_pcm_oss_poll,
2962 .unlocked_ioctl = snd_pcm_oss_ioctl,
2963 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2964 .mmap = snd_pcm_oss_mmap,
2965 };
2966
2967 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2968 {
2969 char name[128];
2970 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2971 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2972 pcm->card, index, &snd_pcm_oss_f_reg,
2973 pcm, name) < 0) {
2974 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2975 pcm->card->number, pcm->device);
2976 }
2977 }
2978
2979 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2980 {
2981 pcm->oss.reg = 0;
2982 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2983 char name[128];
2984 int duplex;
2985 register_oss_dsp(pcm, 0);
2986 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2987 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2988 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2989 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2990 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2991 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2992 pcm->card->number,
2993 name);
2994 #endif
2995 pcm->oss.reg++;
2996 pcm->oss.reg_mask |= 1;
2997 }
2998 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2999 register_oss_dsp(pcm, 1);
3000 pcm->oss.reg++;
3001 pcm->oss.reg_mask |= 2;
3002 }
3003
3004 if (pcm->oss.reg)
3005 snd_pcm_oss_proc_init(pcm);
3006
3007 return 0;
3008 }
3009
3010 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3011 {
3012 if (pcm->oss.reg) {
3013 if (pcm->oss.reg_mask & 1) {
3014 pcm->oss.reg_mask &= ~1;
3015 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3016 pcm->card, 0);
3017 }
3018 if (pcm->oss.reg_mask & 2) {
3019 pcm->oss.reg_mask &= ~2;
3020 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3021 pcm->card, 1);
3022 }
3023 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3024 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3025 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3026 #endif
3027 }
3028 pcm->oss.reg = 0;
3029 }
3030 return 0;
3031 }
3032
3033 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3034 {
3035 snd_pcm_oss_disconnect_minor(pcm);
3036 snd_pcm_oss_proc_done(pcm);
3037 return 0;
3038 }
3039
3040 static struct snd_pcm_notify snd_pcm_oss_notify =
3041 {
3042 .n_register = snd_pcm_oss_register_minor,
3043 .n_disconnect = snd_pcm_oss_disconnect_minor,
3044 .n_unregister = snd_pcm_oss_unregister_minor,
3045 };
3046
3047 static int __init alsa_pcm_oss_init(void)
3048 {
3049 int i;
3050 int err;
3051
3052 /* check device map table */
3053 for (i = 0; i < SNDRV_CARDS; i++) {
3054 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3055 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3056 i, dsp_map[i]);
3057 dsp_map[i] = 0;
3058 }
3059 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3060 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3061 i, adsp_map[i]);
3062 adsp_map[i] = 1;
3063 }
3064 }
3065 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3066 return err;
3067 return 0;
3068 }
3069
3070 static void __exit alsa_pcm_oss_exit(void)
3071 {
3072 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3073 }
3074
3075 module_init(alsa_pcm_oss_init)
3076 module_exit(alsa_pcm_oss_exit)
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