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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[people/ms/linux.git] / sound / core / oss / pcm_oss.c
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/module.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 #include <sound/mixer_oss.h>
45
46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
48 static int dsp_map[SNDRV_CARDS];
49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50 static bool nonblock_open = 1;
51
52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54 MODULE_LICENSE("GPL");
55 module_param_array(dsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57 module_param_array(adsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59 module_param(nonblock_open, bool, 0644);
60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
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 kfree(save);
458 return max;
459 }
460 last = 1;
461 }
462 _end:
463 kfree(save);
464 if (last)
465 v = snd_pcm_hw_param_last(pcm, params, var, dir);
466 else
467 v = snd_pcm_hw_param_first(pcm, params, var, dir);
468 snd_BUG_ON(v < 0);
469 return v;
470 }
471
472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473 snd_pcm_hw_param_t var, unsigned int val,
474 int dir)
475 {
476 int changed;
477 if (hw_is_mask(var)) {
478 struct snd_mask *m = hw_param_mask(params, var);
479 if (val == 0 && dir < 0) {
480 changed = -EINVAL;
481 snd_mask_none(m);
482 } else {
483 if (dir > 0)
484 val++;
485 else if (dir < 0)
486 val--;
487 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488 }
489 } else if (hw_is_interval(var)) {
490 struct snd_interval *i = hw_param_interval(params, var);
491 if (val == 0 && dir < 0) {
492 changed = -EINVAL;
493 snd_interval_none(i);
494 } else if (dir == 0)
495 changed = snd_interval_refine_set(i, val);
496 else {
497 struct snd_interval t;
498 t.openmin = 1;
499 t.openmax = 1;
500 t.empty = 0;
501 t.integer = 0;
502 if (dir < 0) {
503 t.min = val - 1;
504 t.max = val;
505 } else {
506 t.min = val;
507 t.max = val+1;
508 }
509 changed = snd_interval_refine(i, &t);
510 }
511 } else
512 return -EINVAL;
513 if (changed) {
514 params->cmask |= 1 << var;
515 params->rmask |= 1 << var;
516 }
517 return changed;
518 }
519
520 /**
521 * snd_pcm_hw_param_set
522 * @pcm: PCM instance
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
525 * @val: value to set
526 * @dir: pointer to the direction (-1,0,1) or NULL
527 *
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
531 */
532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533 struct snd_pcm_hw_params *params,
534 snd_pcm_hw_param_t var, unsigned int val,
535 int dir)
536 {
537 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
538 if (changed < 0)
539 return changed;
540 if (params->rmask) {
541 int err = snd_pcm_hw_refine(pcm, params);
542 if (err < 0)
543 return err;
544 }
545 return snd_pcm_hw_param_value(params, var, NULL);
546 }
547
548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549 snd_pcm_hw_param_t var)
550 {
551 int changed;
552 changed = snd_interval_setinteger(hw_param_interval(params, var));
553 if (changed) {
554 params->cmask |= 1 << var;
555 params->rmask |= 1 << var;
556 }
557 return changed;
558 }
559
560 /*
561 * plugin
562 */
563
564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
566 {
567 struct snd_pcm_runtime *runtime = substream->runtime;
568 struct snd_pcm_plugin *plugin, *next;
569
570 plugin = runtime->oss.plugin_first;
571 while (plugin) {
572 next = plugin->next;
573 snd_pcm_plugin_free(plugin);
574 plugin = next;
575 }
576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
577 return 0;
578 }
579
580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
581 {
582 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
583 plugin->next = runtime->oss.plugin_first;
584 plugin->prev = NULL;
585 if (runtime->oss.plugin_first) {
586 runtime->oss.plugin_first->prev = plugin;
587 runtime->oss.plugin_first = plugin;
588 } else {
589 runtime->oss.plugin_last =
590 runtime->oss.plugin_first = plugin;
591 }
592 return 0;
593 }
594
595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
596 {
597 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
598 plugin->next = NULL;
599 plugin->prev = runtime->oss.plugin_last;
600 if (runtime->oss.plugin_last) {
601 runtime->oss.plugin_last->next = plugin;
602 runtime->oss.plugin_last = plugin;
603 } else {
604 runtime->oss.plugin_last =
605 runtime->oss.plugin_first = plugin;
606 }
607 return 0;
608 }
609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
610
611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
612 {
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
615 long bytes = frames_to_bytes(runtime, frames);
616 if (buffer_size == runtime->oss.buffer_bytes)
617 return bytes;
618 #if BITS_PER_LONG >= 64
619 return runtime->oss.buffer_bytes * bytes / buffer_size;
620 #else
621 {
622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
623 return div_u64(bsize, buffer_size);
624 }
625 #endif
626 }
627
628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
629 {
630 struct snd_pcm_runtime *runtime = substream->runtime;
631 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
632 if (buffer_size == runtime->oss.buffer_bytes)
633 return bytes_to_frames(runtime, bytes);
634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
635 }
636
637 static inline
638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
639 {
640 return runtime->hw_ptr_interrupt;
641 }
642
643 /* define extended formats in the recent OSS versions (if any) */
644 /* linear formats */
645 #define AFMT_S32_LE 0x00001000
646 #define AFMT_S32_BE 0x00002000
647 #define AFMT_S24_LE 0x00008000
648 #define AFMT_S24_BE 0x00010000
649 #define AFMT_S24_PACKED 0x00040000
650
651 /* other supported formats */
652 #define AFMT_FLOAT 0x00004000
653 #define AFMT_SPDIF_RAW 0x00020000
654
655 /* unsupported formats */
656 #define AFMT_AC3 0x00000400
657 #define AFMT_VORBIS 0x00000800
658
659 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
660 {
661 switch (format) {
662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
679 default: return SNDRV_PCM_FORMAT_U8;
680 }
681 }
682
683 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
684 {
685 switch (format) {
686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
703 default: return -EINVAL;
704 }
705 }
706
707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
708 struct snd_pcm_hw_params *oss_params,
709 struct snd_pcm_hw_params *slave_params)
710 {
711 size_t s;
712 size_t oss_buffer_size, oss_period_size, oss_periods;
713 size_t min_period_size, max_period_size;
714 struct snd_pcm_runtime *runtime = substream->runtime;
715 size_t oss_frame_size;
716
717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718 params_channels(oss_params) / 8;
719
720 oss_buffer_size = snd_pcm_plug_client_size(substream,
721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722 oss_buffer_size = 1 << ld2(oss_buffer_size);
723 if (atomic_read(&substream->mmap_count)) {
724 if (oss_buffer_size > runtime->oss.mmap_bytes)
725 oss_buffer_size = runtime->oss.mmap_bytes;
726 }
727
728 if (substream->oss.setup.period_size > 16)
729 oss_period_size = substream->oss.setup.period_size;
730 else if (runtime->oss.fragshift) {
731 oss_period_size = 1 << runtime->oss.fragshift;
732 if (oss_period_size > oss_buffer_size / 2)
733 oss_period_size = oss_buffer_size / 2;
734 } else {
735 int sd;
736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
737
738 oss_period_size = oss_buffer_size;
739 do {
740 oss_period_size /= 2;
741 } while (oss_period_size > bytes_per_sec);
742 if (runtime->oss.subdivision == 0) {
743 sd = 4;
744 if (oss_period_size / sd > 4096)
745 sd *= 2;
746 if (oss_period_size / sd < 4096)
747 sd = 1;
748 } else
749 sd = runtime->oss.subdivision;
750 oss_period_size /= sd;
751 if (oss_period_size < 16)
752 oss_period_size = 16;
753 }
754
755 min_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 min_period_size *= oss_frame_size;
758 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
759 if (oss_period_size < min_period_size)
760 oss_period_size = min_period_size;
761
762 max_period_size = snd_pcm_plug_client_size(substream,
763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764 max_period_size *= oss_frame_size;
765 max_period_size = 1 << ld2(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
768
769 oss_periods = oss_buffer_size / oss_period_size;
770
771 if (substream->oss.setup.periods > 1)
772 oss_periods = substream->oss.setup.periods;
773
774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776 s = runtime->oss.maxfrags;
777 if (oss_periods > s)
778 oss_periods = s;
779
780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
781 if (s < 2)
782 s = 2;
783 if (oss_periods < s)
784 oss_periods = s;
785
786 while (oss_period_size * oss_periods > oss_buffer_size)
787 oss_period_size /= 2;
788
789 if (oss_period_size < 16)
790 return -EINVAL;
791 runtime->oss.period_bytes = oss_period_size;
792 runtime->oss.period_frames = 1;
793 runtime->oss.periods = oss_periods;
794 return 0;
795 }
796
797 static int choose_rate(struct snd_pcm_substream *substream,
798 struct snd_pcm_hw_params *params, unsigned int best_rate)
799 {
800 struct snd_interval *it;
801 struct snd_pcm_hw_params *save;
802 unsigned int rate, prev;
803
804 save = kmalloc(sizeof(*save), GFP_KERNEL);
805 if (save == NULL)
806 return -ENOMEM;
807 *save = *params;
808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
809
810 /* try multiples of the best rate */
811 rate = best_rate;
812 for (;;) {
813 if (it->max < rate || (it->max == rate && it->openmax))
814 break;
815 if (it->min < rate || (it->min == rate && !it->openmin)) {
816 int ret;
817 ret = snd_pcm_hw_param_set(substream, params,
818 SNDRV_PCM_HW_PARAM_RATE,
819 rate, 0);
820 if (ret == (int)rate) {
821 kfree(save);
822 return rate;
823 }
824 *params = *save;
825 }
826 prev = rate;
827 rate += best_rate;
828 if (rate <= prev)
829 break;
830 }
831
832 /* not found, use the nearest rate */
833 kfree(save);
834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
835 }
836
837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
838 {
839 struct snd_pcm_runtime *runtime = substream->runtime;
840 struct snd_pcm_hw_params *params, *sparams;
841 struct snd_pcm_sw_params *sw_params;
842 ssize_t oss_buffer_size, oss_period_size;
843 size_t oss_frame_size;
844 int err;
845 int direct;
846 snd_pcm_format_t format, sformat;
847 int n;
848 struct snd_mask sformat_mask;
849 struct snd_mask mask;
850
851 if (mutex_lock_interruptible(&runtime->oss.params_lock))
852 return -EINTR;
853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854 params = kmalloc(sizeof(*params), GFP_KERNEL);
855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856 if (!sw_params || !params || !sparams) {
857 pcm_dbg(substream->pcm, "No memory\n");
858 err = -ENOMEM;
859 goto failure;
860 }
861
862 if (atomic_read(&substream->mmap_count))
863 direct = 1;
864 else
865 direct = substream->oss.setup.direct;
866
867 _snd_pcm_hw_params_any(sparams);
868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
870 snd_mask_none(&mask);
871 if (atomic_read(&substream->mmap_count))
872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
873 else {
874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
875 if (!direct)
876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
877 }
878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879 if (err < 0) {
880 pcm_dbg(substream->pcm, "No usable accesses\n");
881 err = -EINVAL;
882 goto failure;
883 }
884 choose_rate(substream, sparams, runtime->oss.rate);
885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886
887 format = snd_pcm_oss_format_from(runtime->oss.format);
888
889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
890 if (direct)
891 sformat = format;
892 else
893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894
895 if ((__force int)sformat < 0 ||
896 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
897 for (sformat = (__force snd_pcm_format_t)0;
898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
900 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
901 snd_pcm_oss_format_to(sformat) >= 0)
902 break;
903 }
904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
905 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
906 err = -EINVAL;
907 goto failure;
908 }
909 }
910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
911 if (err < 0)
912 goto failure;
913
914 if (direct) {
915 memcpy(params, sparams, sizeof(*params));
916 } else {
917 _snd_pcm_hw_params_any(params);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
923 runtime->oss.channels, 0);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
925 runtime->oss.rate, 0);
926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
927 params_access(params), params_format(params),
928 params_channels(params), params_rate(params));
929 }
930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
931 params_access(sparams), params_format(sparams),
932 params_channels(sparams), params_rate(sparams));
933
934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
935 params_channels(params) / 8;
936
937 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
938 snd_pcm_oss_plugin_clear(substream);
939 if (!direct) {
940 /* add necessary plugins */
941 snd_pcm_oss_plugin_clear(substream);
942 if ((err = snd_pcm_plug_format_plugins(substream,
943 params,
944 sparams)) < 0) {
945 pcm_dbg(substream->pcm,
946 "snd_pcm_plug_format_plugins failed: %i\n", err);
947 snd_pcm_oss_plugin_clear(substream);
948 goto failure;
949 }
950 if (runtime->oss.plugin_first) {
951 struct snd_pcm_plugin *plugin;
952 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
953 pcm_dbg(substream->pcm,
954 "snd_pcm_plugin_build_io failed: %i\n", err);
955 snd_pcm_oss_plugin_clear(substream);
956 goto failure;
957 }
958 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
959 err = snd_pcm_plugin_append(plugin);
960 } else {
961 err = snd_pcm_plugin_insert(plugin);
962 }
963 if (err < 0) {
964 snd_pcm_oss_plugin_clear(substream);
965 goto failure;
966 }
967 }
968 }
969 #endif
970
971 err = snd_pcm_oss_period_size(substream, params, sparams);
972 if (err < 0)
973 goto failure;
974
975 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
976 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
977 if (err < 0)
978 goto failure;
979
980 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
981 runtime->oss.periods, NULL);
982 if (err < 0)
983 goto failure;
984
985 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
986
987 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
988 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
989 goto failure;
990 }
991
992 memset(sw_params, 0, sizeof(*sw_params));
993 if (runtime->oss.trigger) {
994 sw_params->start_threshold = 1;
995 } else {
996 sw_params->start_threshold = runtime->boundary;
997 }
998 if (atomic_read(&substream->mmap_count) ||
999 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1000 sw_params->stop_threshold = runtime->boundary;
1001 else
1002 sw_params->stop_threshold = runtime->buffer_size;
1003 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1004 sw_params->period_step = 1;
1005 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1006 1 : runtime->period_size;
1007 if (atomic_read(&substream->mmap_count) ||
1008 substream->oss.setup.nosilence) {
1009 sw_params->silence_threshold = 0;
1010 sw_params->silence_size = 0;
1011 } else {
1012 snd_pcm_uframes_t frames;
1013 frames = runtime->period_size + 16;
1014 if (frames > runtime->buffer_size)
1015 frames = runtime->buffer_size;
1016 sw_params->silence_threshold = frames;
1017 sw_params->silence_size = frames;
1018 }
1019
1020 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1021 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1022 goto failure;
1023 }
1024
1025 runtime->oss.periods = params_periods(sparams);
1026 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1027 if (oss_period_size < 0) {
1028 err = -EINVAL;
1029 goto failure;
1030 }
1031 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1032 if (runtime->oss.plugin_first) {
1033 err = snd_pcm_plug_alloc(substream, oss_period_size);
1034 if (err < 0)
1035 goto failure;
1036 }
1037 #endif
1038 oss_period_size *= oss_frame_size;
1039
1040 oss_buffer_size = oss_period_size * runtime->oss.periods;
1041 if (oss_buffer_size < 0) {
1042 err = -EINVAL;
1043 goto failure;
1044 }
1045
1046 runtime->oss.period_bytes = oss_period_size;
1047 runtime->oss.buffer_bytes = oss_buffer_size;
1048
1049 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1050 runtime->oss.period_bytes,
1051 runtime->oss.buffer_bytes);
1052 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1053 params_period_size(sparams),
1054 params_buffer_size(sparams));
1055
1056 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1057 runtime->oss.channels = params_channels(params);
1058 runtime->oss.rate = params_rate(params);
1059
1060 vfree(runtime->oss.buffer);
1061 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1062 if (!runtime->oss.buffer) {
1063 err = -ENOMEM;
1064 goto failure;
1065 }
1066
1067 runtime->oss.params = 0;
1068 runtime->oss.prepare = 1;
1069 runtime->oss.buffer_used = 0;
1070 if (runtime->dma_area)
1071 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1072
1073 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1074
1075 err = 0;
1076 failure:
1077 kfree(sw_params);
1078 kfree(params);
1079 kfree(sparams);
1080 mutex_unlock(&runtime->oss.params_lock);
1081 return err;
1082 }
1083
1084 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1085 {
1086 int idx, err;
1087 struct snd_pcm_substream *asubstream = NULL, *substream;
1088
1089 for (idx = 0; idx < 2; idx++) {
1090 substream = pcm_oss_file->streams[idx];
1091 if (substream == NULL)
1092 continue;
1093 if (asubstream == NULL)
1094 asubstream = substream;
1095 if (substream->runtime->oss.params) {
1096 err = snd_pcm_oss_change_params(substream);
1097 if (err < 0)
1098 return err;
1099 }
1100 }
1101 if (!asubstream)
1102 return -EIO;
1103 if (r_substream)
1104 *r_substream = asubstream;
1105 return 0;
1106 }
1107
1108 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1109 {
1110 int err;
1111 struct snd_pcm_runtime *runtime = substream->runtime;
1112
1113 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1114 if (err < 0) {
1115 pcm_dbg(substream->pcm,
1116 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1117 return err;
1118 }
1119 runtime->oss.prepare = 0;
1120 runtime->oss.prev_hw_ptr_period = 0;
1121 runtime->oss.period_ptr = 0;
1122 runtime->oss.buffer_used = 0;
1123
1124 return 0;
1125 }
1126
1127 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1128 {
1129 struct snd_pcm_runtime *runtime;
1130 int err;
1131
1132 if (substream == NULL)
1133 return 0;
1134 runtime = substream->runtime;
1135 if (runtime->oss.params) {
1136 err = snd_pcm_oss_change_params(substream);
1137 if (err < 0)
1138 return err;
1139 }
1140 if (runtime->oss.prepare) {
1141 err = snd_pcm_oss_prepare(substream);
1142 if (err < 0)
1143 return err;
1144 }
1145 return 0;
1146 }
1147
1148 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1149 {
1150 struct snd_pcm_runtime *runtime;
1151 snd_pcm_uframes_t frames;
1152 int err = 0;
1153
1154 while (1) {
1155 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1156 if (err < 0)
1157 break;
1158 runtime = substream->runtime;
1159 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1160 break;
1161 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1162 /* until avail(delay) <= buffer_size */
1163 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1164 frames /= runtime->period_size;
1165 frames *= runtime->period_size;
1166 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1167 if (err < 0)
1168 break;
1169 }
1170 return err;
1171 }
1172
1173 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1174 {
1175 struct snd_pcm_runtime *runtime = substream->runtime;
1176 int ret;
1177 while (1) {
1178 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1179 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1180 #ifdef OSS_DEBUG
1181 pcm_dbg(substream->pcm,
1182 "pcm_oss: write: recovering from %s\n",
1183 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1184 "XRUN" : "SUSPEND");
1185 #endif
1186 ret = snd_pcm_oss_prepare(substream);
1187 if (ret < 0)
1188 break;
1189 }
1190 if (in_kernel) {
1191 mm_segment_t fs;
1192 fs = snd_enter_user();
1193 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1194 snd_leave_user(fs);
1195 } else {
1196 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1197 }
1198 if (ret != -EPIPE && ret != -ESTRPIPE)
1199 break;
1200 /* test, if we can't store new data, because the stream */
1201 /* has not been started */
1202 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1203 return -EAGAIN;
1204 }
1205 return ret;
1206 }
1207
1208 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1209 {
1210 struct snd_pcm_runtime *runtime = substream->runtime;
1211 snd_pcm_sframes_t delay;
1212 int ret;
1213 while (1) {
1214 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1215 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1216 #ifdef OSS_DEBUG
1217 pcm_dbg(substream->pcm,
1218 "pcm_oss: read: recovering from %s\n",
1219 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1220 "XRUN" : "SUSPEND");
1221 #endif
1222 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1223 if (ret < 0)
1224 break;
1225 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1226 ret = snd_pcm_oss_prepare(substream);
1227 if (ret < 0)
1228 break;
1229 }
1230 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1231 if (ret < 0)
1232 break;
1233 if (in_kernel) {
1234 mm_segment_t fs;
1235 fs = snd_enter_user();
1236 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1237 snd_leave_user(fs);
1238 } else {
1239 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1240 }
1241 if (ret == -EPIPE) {
1242 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1243 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1244 if (ret < 0)
1245 break;
1246 }
1247 continue;
1248 }
1249 if (ret != -ESTRPIPE)
1250 break;
1251 }
1252 return ret;
1253 }
1254
1255 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1256 {
1257 struct snd_pcm_runtime *runtime = substream->runtime;
1258 int ret;
1259 while (1) {
1260 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1261 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1262 #ifdef OSS_DEBUG
1263 pcm_dbg(substream->pcm,
1264 "pcm_oss: writev: recovering from %s\n",
1265 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1266 "XRUN" : "SUSPEND");
1267 #endif
1268 ret = snd_pcm_oss_prepare(substream);
1269 if (ret < 0)
1270 break;
1271 }
1272 if (in_kernel) {
1273 mm_segment_t fs;
1274 fs = snd_enter_user();
1275 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1276 snd_leave_user(fs);
1277 } else {
1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279 }
1280 if (ret != -EPIPE && ret != -ESTRPIPE)
1281 break;
1282
1283 /* test, if we can't store new data, because the stream */
1284 /* has not been started */
1285 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1286 return -EAGAIN;
1287 }
1288 return ret;
1289 }
1290
1291 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1292 {
1293 struct snd_pcm_runtime *runtime = substream->runtime;
1294 int ret;
1295 while (1) {
1296 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1297 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1298 #ifdef OSS_DEBUG
1299 pcm_dbg(substream->pcm,
1300 "pcm_oss: readv: recovering from %s\n",
1301 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1302 "XRUN" : "SUSPEND");
1303 #endif
1304 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1305 if (ret < 0)
1306 break;
1307 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1308 ret = snd_pcm_oss_prepare(substream);
1309 if (ret < 0)
1310 break;
1311 }
1312 if (in_kernel) {
1313 mm_segment_t fs;
1314 fs = snd_enter_user();
1315 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1316 snd_leave_user(fs);
1317 } else {
1318 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1319 }
1320 if (ret != -EPIPE && ret != -ESTRPIPE)
1321 break;
1322 }
1323 return ret;
1324 }
1325
1326 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1327 {
1328 struct snd_pcm_runtime *runtime = substream->runtime;
1329 snd_pcm_sframes_t frames, frames1;
1330 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1331 if (runtime->oss.plugin_first) {
1332 struct snd_pcm_plugin_channel *channels;
1333 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1334 if (!in_kernel) {
1335 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1336 return -EFAULT;
1337 buf = runtime->oss.buffer;
1338 }
1339 frames = bytes / oss_frame_bytes;
1340 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1341 if (frames1 < 0)
1342 return frames1;
1343 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1344 if (frames1 <= 0)
1345 return frames1;
1346 bytes = frames1 * oss_frame_bytes;
1347 } else
1348 #endif
1349 {
1350 frames = bytes_to_frames(runtime, bytes);
1351 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1352 if (frames1 <= 0)
1353 return frames1;
1354 bytes = frames_to_bytes(runtime, frames1);
1355 }
1356 return bytes;
1357 }
1358
1359 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1360 {
1361 size_t xfer = 0;
1362 ssize_t tmp;
1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364
1365 if (atomic_read(&substream->mmap_count))
1366 return -ENXIO;
1367
1368 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1369 return tmp;
1370 mutex_lock(&runtime->oss.params_lock);
1371 while (bytes > 0) {
1372 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1373 tmp = bytes;
1374 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1375 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1376 if (tmp > 0) {
1377 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1378 tmp = -EFAULT;
1379 goto err;
1380 }
1381 }
1382 runtime->oss.buffer_used += tmp;
1383 buf += tmp;
1384 bytes -= tmp;
1385 xfer += tmp;
1386 if (substream->oss.setup.partialfrag ||
1387 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1388 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1389 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1390 if (tmp <= 0)
1391 goto err;
1392 runtime->oss.bytes += tmp;
1393 runtime->oss.period_ptr += tmp;
1394 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1395 if (runtime->oss.period_ptr == 0 ||
1396 runtime->oss.period_ptr == runtime->oss.buffer_used)
1397 runtime->oss.buffer_used = 0;
1398 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1399 tmp = -EAGAIN;
1400 goto err;
1401 }
1402 }
1403 } else {
1404 tmp = snd_pcm_oss_write2(substream,
1405 (const char __force *)buf,
1406 runtime->oss.period_bytes, 0);
1407 if (tmp <= 0)
1408 goto err;
1409 runtime->oss.bytes += tmp;
1410 buf += tmp;
1411 bytes -= tmp;
1412 xfer += tmp;
1413 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1414 tmp != runtime->oss.period_bytes)
1415 break;
1416 }
1417 }
1418 mutex_unlock(&runtime->oss.params_lock);
1419 return xfer;
1420
1421 err:
1422 mutex_unlock(&runtime->oss.params_lock);
1423 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1424 }
1425
1426 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1427 {
1428 struct snd_pcm_runtime *runtime = substream->runtime;
1429 snd_pcm_sframes_t frames, frames1;
1430 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1431 char __user *final_dst = (char __force __user *)buf;
1432 if (runtime->oss.plugin_first) {
1433 struct snd_pcm_plugin_channel *channels;
1434 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1435 if (!in_kernel)
1436 buf = runtime->oss.buffer;
1437 frames = bytes / oss_frame_bytes;
1438 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1439 if (frames1 < 0)
1440 return frames1;
1441 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1442 if (frames1 <= 0)
1443 return frames1;
1444 bytes = frames1 * oss_frame_bytes;
1445 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1446 return -EFAULT;
1447 } else
1448 #endif
1449 {
1450 frames = bytes_to_frames(runtime, bytes);
1451 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1452 if (frames1 <= 0)
1453 return frames1;
1454 bytes = frames_to_bytes(runtime, frames1);
1455 }
1456 return bytes;
1457 }
1458
1459 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1460 {
1461 size_t xfer = 0;
1462 ssize_t tmp;
1463 struct snd_pcm_runtime *runtime = substream->runtime;
1464
1465 if (atomic_read(&substream->mmap_count))
1466 return -ENXIO;
1467
1468 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1469 return tmp;
1470 mutex_lock(&runtime->oss.params_lock);
1471 while (bytes > 0) {
1472 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1473 if (runtime->oss.buffer_used == 0) {
1474 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1475 if (tmp <= 0)
1476 goto err;
1477 runtime->oss.bytes += tmp;
1478 runtime->oss.period_ptr = tmp;
1479 runtime->oss.buffer_used = tmp;
1480 }
1481 tmp = bytes;
1482 if ((size_t) tmp > runtime->oss.buffer_used)
1483 tmp = runtime->oss.buffer_used;
1484 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1485 tmp = -EFAULT;
1486 goto err;
1487 }
1488 buf += tmp;
1489 bytes -= tmp;
1490 xfer += tmp;
1491 runtime->oss.buffer_used -= tmp;
1492 } else {
1493 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1494 runtime->oss.period_bytes, 0);
1495 if (tmp <= 0)
1496 goto err;
1497 runtime->oss.bytes += tmp;
1498 buf += tmp;
1499 bytes -= tmp;
1500 xfer += tmp;
1501 }
1502 }
1503 mutex_unlock(&runtime->oss.params_lock);
1504 return xfer;
1505
1506 err:
1507 mutex_unlock(&runtime->oss.params_lock);
1508 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1509 }
1510
1511 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1512 {
1513 struct snd_pcm_substream *substream;
1514 struct snd_pcm_runtime *runtime;
1515 int i;
1516
1517 for (i = 0; i < 2; i++) {
1518 substream = pcm_oss_file->streams[i];
1519 if (!substream)
1520 continue;
1521 runtime = substream->runtime;
1522 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1523 runtime->oss.prepare = 1;
1524 runtime->oss.buffer_used = 0;
1525 runtime->oss.prev_hw_ptr_period = 0;
1526 runtime->oss.period_ptr = 0;
1527 }
1528 return 0;
1529 }
1530
1531 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1532 {
1533 struct snd_pcm_substream *substream;
1534 int err;
1535
1536 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1537 if (substream != NULL) {
1538 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1539 return err;
1540 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1541 }
1542 /* note: all errors from the start action are ignored */
1543 /* OSS apps do not know, how to handle them */
1544 return 0;
1545 }
1546
1547 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1548 {
1549 struct snd_pcm_runtime *runtime;
1550 ssize_t result = 0;
1551 snd_pcm_state_t state;
1552 long res;
1553 wait_queue_t wait;
1554
1555 runtime = substream->runtime;
1556 init_waitqueue_entry(&wait, current);
1557 add_wait_queue(&runtime->sleep, &wait);
1558 #ifdef OSS_DEBUG
1559 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1560 #endif
1561 while (1) {
1562 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1563 if (result > 0) {
1564 runtime->oss.buffer_used = 0;
1565 result = 0;
1566 break;
1567 }
1568 if (result != 0 && result != -EAGAIN)
1569 break;
1570 result = 0;
1571 set_current_state(TASK_INTERRUPTIBLE);
1572 snd_pcm_stream_lock_irq(substream);
1573 state = runtime->status->state;
1574 snd_pcm_stream_unlock_irq(substream);
1575 if (state != SNDRV_PCM_STATE_RUNNING) {
1576 set_current_state(TASK_RUNNING);
1577 break;
1578 }
1579 res = schedule_timeout(10 * HZ);
1580 if (signal_pending(current)) {
1581 result = -ERESTARTSYS;
1582 break;
1583 }
1584 if (res == 0) {
1585 pcm_err(substream->pcm,
1586 "OSS sync error - DMA timeout\n");
1587 result = -EIO;
1588 break;
1589 }
1590 }
1591 remove_wait_queue(&runtime->sleep, &wait);
1592 return result;
1593 }
1594
1595 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1596 {
1597 int err = 0;
1598 unsigned int saved_f_flags;
1599 struct snd_pcm_substream *substream;
1600 struct snd_pcm_runtime *runtime;
1601 snd_pcm_format_t format;
1602 unsigned long width;
1603 size_t size;
1604
1605 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1606 if (substream != NULL) {
1607 runtime = substream->runtime;
1608 if (atomic_read(&substream->mmap_count))
1609 goto __direct;
1610 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1611 return err;
1612 format = snd_pcm_oss_format_from(runtime->oss.format);
1613 width = snd_pcm_format_physical_width(format);
1614 mutex_lock(&runtime->oss.params_lock);
1615 if (runtime->oss.buffer_used > 0) {
1616 #ifdef OSS_DEBUG
1617 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1618 #endif
1619 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1620 snd_pcm_format_set_silence(format,
1621 runtime->oss.buffer + runtime->oss.buffer_used,
1622 size);
1623 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1624 if (err < 0) {
1625 mutex_unlock(&runtime->oss.params_lock);
1626 return err;
1627 }
1628 } else if (runtime->oss.period_ptr > 0) {
1629 #ifdef OSS_DEBUG
1630 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1631 #endif
1632 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1633 snd_pcm_format_set_silence(format,
1634 runtime->oss.buffer,
1635 size * 8 / width);
1636 err = snd_pcm_oss_sync1(substream, size);
1637 if (err < 0) {
1638 mutex_unlock(&runtime->oss.params_lock);
1639 return err;
1640 }
1641 }
1642 /*
1643 * The ALSA's period might be a bit large than OSS one.
1644 * Fill the remain portion of ALSA period with zeros.
1645 */
1646 size = runtime->control->appl_ptr % runtime->period_size;
1647 if (size > 0) {
1648 size = runtime->period_size - size;
1649 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1650 size = (runtime->frame_bits * size) / 8;
1651 while (size > 0) {
1652 mm_segment_t fs;
1653 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1654 size -= size1;
1655 size1 *= 8;
1656 size1 /= runtime->sample_bits;
1657 snd_pcm_format_set_silence(runtime->format,
1658 runtime->oss.buffer,
1659 size1);
1660 size1 /= runtime->channels; /* frames */
1661 fs = snd_enter_user();
1662 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1663 snd_leave_user(fs);
1664 }
1665 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1666 void __user *buffers[runtime->channels];
1667 memset(buffers, 0, runtime->channels * sizeof(void *));
1668 snd_pcm_lib_writev(substream, buffers, size);
1669 }
1670 }
1671 mutex_unlock(&runtime->oss.params_lock);
1672 /*
1673 * finish sync: drain the buffer
1674 */
1675 __direct:
1676 saved_f_flags = substream->f_flags;
1677 substream->f_flags &= ~O_NONBLOCK;
1678 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1679 substream->f_flags = saved_f_flags;
1680 if (err < 0)
1681 return err;
1682 runtime->oss.prepare = 1;
1683 }
1684
1685 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1686 if (substream != NULL) {
1687 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1688 return err;
1689 runtime = substream->runtime;
1690 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1691 if (err < 0)
1692 return err;
1693 runtime->oss.buffer_used = 0;
1694 runtime->oss.prepare = 1;
1695 }
1696 return 0;
1697 }
1698
1699 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1700 {
1701 int idx;
1702
1703 for (idx = 1; idx >= 0; --idx) {
1704 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1705 struct snd_pcm_runtime *runtime;
1706 if (substream == NULL)
1707 continue;
1708 runtime = substream->runtime;
1709 if (rate < 1000)
1710 rate = 1000;
1711 else if (rate > 192000)
1712 rate = 192000;
1713 if (runtime->oss.rate != rate) {
1714 runtime->oss.params = 1;
1715 runtime->oss.rate = rate;
1716 }
1717 }
1718 return snd_pcm_oss_get_rate(pcm_oss_file);
1719 }
1720
1721 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1722 {
1723 struct snd_pcm_substream *substream;
1724 int err;
1725
1726 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1727 return err;
1728 return substream->runtime->oss.rate;
1729 }
1730
1731 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1732 {
1733 int idx;
1734 if (channels < 1)
1735 channels = 1;
1736 if (channels > 128)
1737 return -EINVAL;
1738 for (idx = 1; idx >= 0; --idx) {
1739 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1740 struct snd_pcm_runtime *runtime;
1741 if (substream == NULL)
1742 continue;
1743 runtime = substream->runtime;
1744 if (runtime->oss.channels != channels) {
1745 runtime->oss.params = 1;
1746 runtime->oss.channels = channels;
1747 }
1748 }
1749 return snd_pcm_oss_get_channels(pcm_oss_file);
1750 }
1751
1752 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1753 {
1754 struct snd_pcm_substream *substream;
1755 int err;
1756
1757 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1758 return err;
1759 return substream->runtime->oss.channels;
1760 }
1761
1762 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1763 {
1764 struct snd_pcm_substream *substream;
1765 int err;
1766
1767 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1768 return err;
1769 return substream->runtime->oss.period_bytes;
1770 }
1771
1772 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1773 {
1774 struct snd_pcm_substream *substream;
1775 int err;
1776 int direct;
1777 struct snd_pcm_hw_params *params;
1778 unsigned int formats = 0;
1779 struct snd_mask format_mask;
1780 int fmt;
1781
1782 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1783 return err;
1784 if (atomic_read(&substream->mmap_count))
1785 direct = 1;
1786 else
1787 direct = substream->oss.setup.direct;
1788 if (!direct)
1789 return AFMT_MU_LAW | AFMT_U8 |
1790 AFMT_S16_LE | AFMT_S16_BE |
1791 AFMT_S8 | AFMT_U16_LE |
1792 AFMT_U16_BE |
1793 AFMT_S32_LE | AFMT_S32_BE |
1794 AFMT_S24_LE | AFMT_S24_BE |
1795 AFMT_S24_PACKED;
1796 params = kmalloc(sizeof(*params), GFP_KERNEL);
1797 if (!params)
1798 return -ENOMEM;
1799 _snd_pcm_hw_params_any(params);
1800 err = snd_pcm_hw_refine(substream, params);
1801 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1802 kfree(params);
1803 if (err < 0)
1804 return err;
1805 for (fmt = 0; fmt < 32; ++fmt) {
1806 if (snd_mask_test(&format_mask, fmt)) {
1807 int f = snd_pcm_oss_format_to(fmt);
1808 if (f >= 0)
1809 formats |= f;
1810 }
1811 }
1812 return formats;
1813 }
1814
1815 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1816 {
1817 int formats, idx;
1818
1819 if (format != AFMT_QUERY) {
1820 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1821 if (formats < 0)
1822 return formats;
1823 if (!(formats & format))
1824 format = AFMT_U8;
1825 for (idx = 1; idx >= 0; --idx) {
1826 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1827 struct snd_pcm_runtime *runtime;
1828 if (substream == NULL)
1829 continue;
1830 runtime = substream->runtime;
1831 if (runtime->oss.format != format) {
1832 runtime->oss.params = 1;
1833 runtime->oss.format = format;
1834 }
1835 }
1836 }
1837 return snd_pcm_oss_get_format(pcm_oss_file);
1838 }
1839
1840 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1841 {
1842 struct snd_pcm_substream *substream;
1843 int err;
1844
1845 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1846 return err;
1847 return substream->runtime->oss.format;
1848 }
1849
1850 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1851 {
1852 struct snd_pcm_runtime *runtime;
1853
1854 if (substream == NULL)
1855 return 0;
1856 runtime = substream->runtime;
1857 if (subdivide == 0) {
1858 subdivide = runtime->oss.subdivision;
1859 if (subdivide == 0)
1860 subdivide = 1;
1861 return subdivide;
1862 }
1863 if (runtime->oss.subdivision || runtime->oss.fragshift)
1864 return -EINVAL;
1865 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1866 subdivide != 8 && subdivide != 16)
1867 return -EINVAL;
1868 runtime->oss.subdivision = subdivide;
1869 runtime->oss.params = 1;
1870 return subdivide;
1871 }
1872
1873 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1874 {
1875 int err = -EINVAL, idx;
1876
1877 for (idx = 1; idx >= 0; --idx) {
1878 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1879 if (substream == NULL)
1880 continue;
1881 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1882 return err;
1883 }
1884 return err;
1885 }
1886
1887 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1888 {
1889 struct snd_pcm_runtime *runtime;
1890
1891 if (substream == NULL)
1892 return 0;
1893 runtime = substream->runtime;
1894 if (runtime->oss.subdivision || runtime->oss.fragshift)
1895 return -EINVAL;
1896 runtime->oss.fragshift = val & 0xffff;
1897 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1898 if (runtime->oss.fragshift < 4) /* < 16 */
1899 runtime->oss.fragshift = 4;
1900 if (runtime->oss.maxfrags < 2)
1901 runtime->oss.maxfrags = 2;
1902 runtime->oss.params = 1;
1903 return 0;
1904 }
1905
1906 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1907 {
1908 int err = -EINVAL, idx;
1909
1910 for (idx = 1; idx >= 0; --idx) {
1911 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1912 if (substream == NULL)
1913 continue;
1914 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1915 return err;
1916 }
1917 return err;
1918 }
1919
1920 static int snd_pcm_oss_nonblock(struct file * file)
1921 {
1922 spin_lock(&file->f_lock);
1923 file->f_flags |= O_NONBLOCK;
1924 spin_unlock(&file->f_lock);
1925 return 0;
1926 }
1927
1928 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1929 {
1930
1931 if (substream == NULL) {
1932 res &= ~DSP_CAP_DUPLEX;
1933 return res;
1934 }
1935 #ifdef DSP_CAP_MULTI
1936 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1937 if (substream->pstr->substream_count > 1)
1938 res |= DSP_CAP_MULTI;
1939 #endif
1940 /* DSP_CAP_REALTIME is set all times: */
1941 /* all ALSA drivers can return actual pointer in ring buffer */
1942 #if defined(DSP_CAP_REALTIME) && 0
1943 {
1944 struct snd_pcm_runtime *runtime = substream->runtime;
1945 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1946 res &= ~DSP_CAP_REALTIME;
1947 }
1948 #endif
1949 return res;
1950 }
1951
1952 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1953 {
1954 int result, idx;
1955
1956 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1957 for (idx = 0; idx < 2; idx++) {
1958 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1959 result = snd_pcm_oss_get_caps1(substream, result);
1960 }
1961 result |= 0x0001; /* revision - same as SB AWE 64 */
1962 return result;
1963 }
1964
1965 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1966 snd_pcm_uframes_t hw_ptr)
1967 {
1968 struct snd_pcm_runtime *runtime = substream->runtime;
1969 snd_pcm_uframes_t appl_ptr;
1970 appl_ptr = hw_ptr + runtime->buffer_size;
1971 appl_ptr %= runtime->boundary;
1972 runtime->control->appl_ptr = appl_ptr;
1973 }
1974
1975 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1976 {
1977 struct snd_pcm_runtime *runtime;
1978 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1979 int err, cmd;
1980
1981 #ifdef OSS_DEBUG
1982 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1983 #endif
1984
1985 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1986 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1987
1988 if (psubstream) {
1989 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1990 return err;
1991 }
1992 if (csubstream) {
1993 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1994 return err;
1995 }
1996 if (psubstream) {
1997 runtime = psubstream->runtime;
1998 if (trigger & PCM_ENABLE_OUTPUT) {
1999 if (runtime->oss.trigger)
2000 goto _skip1;
2001 if (atomic_read(&psubstream->mmap_count))
2002 snd_pcm_oss_simulate_fill(psubstream,
2003 get_hw_ptr_period(runtime));
2004 runtime->oss.trigger = 1;
2005 runtime->start_threshold = 1;
2006 cmd = SNDRV_PCM_IOCTL_START;
2007 } else {
2008 if (!runtime->oss.trigger)
2009 goto _skip1;
2010 runtime->oss.trigger = 0;
2011 runtime->start_threshold = runtime->boundary;
2012 cmd = SNDRV_PCM_IOCTL_DROP;
2013 runtime->oss.prepare = 1;
2014 }
2015 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2016 if (err < 0)
2017 return err;
2018 }
2019 _skip1:
2020 if (csubstream) {
2021 runtime = csubstream->runtime;
2022 if (trigger & PCM_ENABLE_INPUT) {
2023 if (runtime->oss.trigger)
2024 goto _skip2;
2025 runtime->oss.trigger = 1;
2026 runtime->start_threshold = 1;
2027 cmd = SNDRV_PCM_IOCTL_START;
2028 } else {
2029 if (!runtime->oss.trigger)
2030 goto _skip2;
2031 runtime->oss.trigger = 0;
2032 runtime->start_threshold = runtime->boundary;
2033 cmd = SNDRV_PCM_IOCTL_DROP;
2034 runtime->oss.prepare = 1;
2035 }
2036 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2037 if (err < 0)
2038 return err;
2039 }
2040 _skip2:
2041 return 0;
2042 }
2043
2044 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2045 {
2046 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2047 int result = 0;
2048
2049 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2050 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2051 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2052 result |= PCM_ENABLE_OUTPUT;
2053 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2054 result |= PCM_ENABLE_INPUT;
2055 return result;
2056 }
2057
2058 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2059 {
2060 struct snd_pcm_substream *substream;
2061 struct snd_pcm_runtime *runtime;
2062 snd_pcm_sframes_t delay;
2063 int err;
2064
2065 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2066 if (substream == NULL)
2067 return -EINVAL;
2068 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2069 return err;
2070 runtime = substream->runtime;
2071 if (runtime->oss.params || runtime->oss.prepare)
2072 return 0;
2073 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2074 if (err == -EPIPE)
2075 delay = 0; /* hack for broken OSS applications */
2076 else if (err < 0)
2077 return err;
2078 return snd_pcm_oss_bytes(substream, delay);
2079 }
2080
2081 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2082 {
2083 struct snd_pcm_substream *substream;
2084 struct snd_pcm_runtime *runtime;
2085 snd_pcm_sframes_t delay;
2086 int fixup;
2087 struct count_info info;
2088 int err;
2089
2090 if (_info == NULL)
2091 return -EFAULT;
2092 substream = pcm_oss_file->streams[stream];
2093 if (substream == NULL)
2094 return -EINVAL;
2095 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2096 return err;
2097 runtime = substream->runtime;
2098 if (runtime->oss.params || runtime->oss.prepare) {
2099 memset(&info, 0, sizeof(info));
2100 if (copy_to_user(_info, &info, sizeof(info)))
2101 return -EFAULT;
2102 return 0;
2103 }
2104 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2105 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2106 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2107 err = 0;
2108 delay = 0;
2109 fixup = 0;
2110 } else {
2111 fixup = runtime->oss.buffer_used;
2112 }
2113 } else {
2114 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2115 fixup = -runtime->oss.buffer_used;
2116 }
2117 if (err < 0)
2118 return err;
2119 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2120 if (atomic_read(&substream->mmap_count)) {
2121 snd_pcm_sframes_t n;
2122 delay = get_hw_ptr_period(runtime);
2123 n = delay - runtime->oss.prev_hw_ptr_period;
2124 if (n < 0)
2125 n += runtime->boundary;
2126 info.blocks = n / runtime->period_size;
2127 runtime->oss.prev_hw_ptr_period = delay;
2128 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2129 snd_pcm_oss_simulate_fill(substream, delay);
2130 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2131 } else {
2132 delay = snd_pcm_oss_bytes(substream, delay);
2133 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2134 if (substream->oss.setup.buggyptr)
2135 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2136 else
2137 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2138 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2139 } else {
2140 delay += fixup;
2141 info.blocks = delay / runtime->oss.period_bytes;
2142 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2143 }
2144 }
2145 if (copy_to_user(_info, &info, sizeof(info)))
2146 return -EFAULT;
2147 return 0;
2148 }
2149
2150 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2151 {
2152 struct snd_pcm_substream *substream;
2153 struct snd_pcm_runtime *runtime;
2154 snd_pcm_sframes_t avail;
2155 int fixup;
2156 struct audio_buf_info info;
2157 int err;
2158
2159 if (_info == NULL)
2160 return -EFAULT;
2161 substream = pcm_oss_file->streams[stream];
2162 if (substream == NULL)
2163 return -EINVAL;
2164 runtime = substream->runtime;
2165
2166 if (runtime->oss.params &&
2167 (err = snd_pcm_oss_change_params(substream)) < 0)
2168 return err;
2169
2170 info.fragsize = runtime->oss.period_bytes;
2171 info.fragstotal = runtime->periods;
2172 if (runtime->oss.prepare) {
2173 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2174 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2175 info.fragments = runtime->oss.periods;
2176 } else {
2177 info.bytes = 0;
2178 info.fragments = 0;
2179 }
2180 } else {
2181 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2182 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2183 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2184 avail = runtime->buffer_size;
2185 err = 0;
2186 fixup = 0;
2187 } else {
2188 avail = runtime->buffer_size - avail;
2189 fixup = -runtime->oss.buffer_used;
2190 }
2191 } else {
2192 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2193 fixup = runtime->oss.buffer_used;
2194 }
2195 if (err < 0)
2196 return err;
2197 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2198 info.fragments = info.bytes / runtime->oss.period_bytes;
2199 }
2200
2201 #ifdef OSS_DEBUG
2202 pcm_dbg(substream->pcm,
2203 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2204 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2205 #endif
2206 if (copy_to_user(_info, &info, sizeof(info)))
2207 return -EFAULT;
2208 return 0;
2209 }
2210
2211 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2212 {
2213 // it won't be probably implemented
2214 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2215 return -EINVAL;
2216 }
2217
2218 static const char *strip_task_path(const char *path)
2219 {
2220 const char *ptr, *ptrl = NULL;
2221 for (ptr = path; *ptr; ptr++) {
2222 if (*ptr == '/')
2223 ptrl = ptr + 1;
2224 }
2225 return ptrl;
2226 }
2227
2228 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2229 const char *task_name,
2230 struct snd_pcm_oss_setup *rsetup)
2231 {
2232 struct snd_pcm_oss_setup *setup;
2233
2234 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2235 do {
2236 for (setup = pcm->streams[stream].oss.setup_list; setup;
2237 setup = setup->next) {
2238 if (!strcmp(setup->task_name, task_name))
2239 goto out;
2240 }
2241 } while ((task_name = strip_task_path(task_name)) != NULL);
2242 out:
2243 if (setup)
2244 *rsetup = *setup;
2245 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2246 }
2247
2248 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2249 {
2250 struct snd_pcm_runtime *runtime;
2251 runtime = substream->runtime;
2252 vfree(runtime->oss.buffer);
2253 runtime->oss.buffer = NULL;
2254 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2255 snd_pcm_oss_plugin_clear(substream);
2256 #endif
2257 substream->oss.oss = 0;
2258 }
2259
2260 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2261 struct snd_pcm_oss_setup *setup,
2262 int minor)
2263 {
2264 struct snd_pcm_runtime *runtime;
2265
2266 substream->oss.oss = 1;
2267 substream->oss.setup = *setup;
2268 if (setup->nonblock)
2269 substream->f_flags |= O_NONBLOCK;
2270 else if (setup->block)
2271 substream->f_flags &= ~O_NONBLOCK;
2272 runtime = substream->runtime;
2273 runtime->oss.params = 1;
2274 runtime->oss.trigger = 1;
2275 runtime->oss.rate = 8000;
2276 mutex_init(&runtime->oss.params_lock);
2277 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2278 case SNDRV_MINOR_OSS_PCM_8:
2279 runtime->oss.format = AFMT_U8;
2280 break;
2281 case SNDRV_MINOR_OSS_PCM_16:
2282 runtime->oss.format = AFMT_S16_LE;
2283 break;
2284 default:
2285 runtime->oss.format = AFMT_MU_LAW;
2286 }
2287 runtime->oss.channels = 1;
2288 runtime->oss.fragshift = 0;
2289 runtime->oss.maxfrags = 0;
2290 runtime->oss.subdivision = 0;
2291 substream->pcm_release = snd_pcm_oss_release_substream;
2292 }
2293
2294 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2295 {
2296 int cidx;
2297 if (!pcm_oss_file)
2298 return 0;
2299 for (cidx = 0; cidx < 2; ++cidx) {
2300 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2301 if (substream)
2302 snd_pcm_release_substream(substream);
2303 }
2304 kfree(pcm_oss_file);
2305 return 0;
2306 }
2307
2308 static int snd_pcm_oss_open_file(struct file *file,
2309 struct snd_pcm *pcm,
2310 struct snd_pcm_oss_file **rpcm_oss_file,
2311 int minor,
2312 struct snd_pcm_oss_setup *setup)
2313 {
2314 int idx, err;
2315 struct snd_pcm_oss_file *pcm_oss_file;
2316 struct snd_pcm_substream *substream;
2317 fmode_t f_mode = file->f_mode;
2318
2319 if (rpcm_oss_file)
2320 *rpcm_oss_file = NULL;
2321
2322 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2323 if (pcm_oss_file == NULL)
2324 return -ENOMEM;
2325
2326 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2327 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2328 f_mode = FMODE_WRITE;
2329
2330 file->f_flags &= ~O_APPEND;
2331 for (idx = 0; idx < 2; idx++) {
2332 if (setup[idx].disable)
2333 continue;
2334 if (! pcm->streams[idx].substream_count)
2335 continue; /* no matching substream */
2336 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2337 if (! (f_mode & FMODE_WRITE))
2338 continue;
2339 } else {
2340 if (! (f_mode & FMODE_READ))
2341 continue;
2342 }
2343 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2344 if (err < 0) {
2345 snd_pcm_oss_release_file(pcm_oss_file);
2346 return err;
2347 }
2348
2349 pcm_oss_file->streams[idx] = substream;
2350 substream->file = pcm_oss_file;
2351 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2352 }
2353
2354 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2355 snd_pcm_oss_release_file(pcm_oss_file);
2356 return -EINVAL;
2357 }
2358
2359 file->private_data = pcm_oss_file;
2360 if (rpcm_oss_file)
2361 *rpcm_oss_file = pcm_oss_file;
2362 return 0;
2363 }
2364
2365
2366 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2367 {
2368 unsigned int idx;
2369
2370 if (snd_BUG_ON(!task || !name || size < 2))
2371 return -EINVAL;
2372 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2373 name[idx] = task->comm[idx];
2374 name[idx] = '\0';
2375 return 0;
2376 }
2377
2378 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2379 {
2380 int err;
2381 char task_name[32];
2382 struct snd_pcm *pcm;
2383 struct snd_pcm_oss_file *pcm_oss_file;
2384 struct snd_pcm_oss_setup setup[2];
2385 int nonblock;
2386 wait_queue_t wait;
2387
2388 err = nonseekable_open(inode, file);
2389 if (err < 0)
2390 return err;
2391
2392 pcm = snd_lookup_oss_minor_data(iminor(inode),
2393 SNDRV_OSS_DEVICE_TYPE_PCM);
2394 if (pcm == NULL) {
2395 err = -ENODEV;
2396 goto __error1;
2397 }
2398 err = snd_card_file_add(pcm->card, file);
2399 if (err < 0)
2400 goto __error1;
2401 if (!try_module_get(pcm->card->module)) {
2402 err = -EFAULT;
2403 goto __error2;
2404 }
2405 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2406 err = -EFAULT;
2407 goto __error;
2408 }
2409 memset(setup, 0, sizeof(setup));
2410 if (file->f_mode & FMODE_WRITE)
2411 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2412 task_name, &setup[0]);
2413 if (file->f_mode & FMODE_READ)
2414 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2415 task_name, &setup[1]);
2416
2417 nonblock = !!(file->f_flags & O_NONBLOCK);
2418 if (!nonblock)
2419 nonblock = nonblock_open;
2420
2421 init_waitqueue_entry(&wait, current);
2422 add_wait_queue(&pcm->open_wait, &wait);
2423 mutex_lock(&pcm->open_mutex);
2424 while (1) {
2425 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2426 iminor(inode), setup);
2427 if (err >= 0)
2428 break;
2429 if (err == -EAGAIN) {
2430 if (nonblock) {
2431 err = -EBUSY;
2432 break;
2433 }
2434 } else
2435 break;
2436 set_current_state(TASK_INTERRUPTIBLE);
2437 mutex_unlock(&pcm->open_mutex);
2438 schedule();
2439 mutex_lock(&pcm->open_mutex);
2440 if (pcm->card->shutdown) {
2441 err = -ENODEV;
2442 break;
2443 }
2444 if (signal_pending(current)) {
2445 err = -ERESTARTSYS;
2446 break;
2447 }
2448 }
2449 remove_wait_queue(&pcm->open_wait, &wait);
2450 mutex_unlock(&pcm->open_mutex);
2451 if (err < 0)
2452 goto __error;
2453 snd_card_unref(pcm->card);
2454 return err;
2455
2456 __error:
2457 module_put(pcm->card->module);
2458 __error2:
2459 snd_card_file_remove(pcm->card, file);
2460 __error1:
2461 if (pcm)
2462 snd_card_unref(pcm->card);
2463 return err;
2464 }
2465
2466 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2467 {
2468 struct snd_pcm *pcm;
2469 struct snd_pcm_substream *substream;
2470 struct snd_pcm_oss_file *pcm_oss_file;
2471
2472 pcm_oss_file = file->private_data;
2473 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2474 if (substream == NULL)
2475 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2476 if (snd_BUG_ON(!substream))
2477 return -ENXIO;
2478 pcm = substream->pcm;
2479 if (!pcm->card->shutdown)
2480 snd_pcm_oss_sync(pcm_oss_file);
2481 mutex_lock(&pcm->open_mutex);
2482 snd_pcm_oss_release_file(pcm_oss_file);
2483 mutex_unlock(&pcm->open_mutex);
2484 wake_up(&pcm->open_wait);
2485 module_put(pcm->card->module);
2486 snd_card_file_remove(pcm->card, file);
2487 return 0;
2488 }
2489
2490 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2491 {
2492 struct snd_pcm_oss_file *pcm_oss_file;
2493 int __user *p = (int __user *)arg;
2494 int res;
2495
2496 pcm_oss_file = file->private_data;
2497 if (cmd == OSS_GETVERSION)
2498 return put_user(SNDRV_OSS_VERSION, p);
2499 if (cmd == OSS_ALSAEMULVER)
2500 return put_user(1, p);
2501 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2502 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2503 struct snd_pcm_substream *substream;
2504 int idx;
2505 for (idx = 0; idx < 2; ++idx) {
2506 substream = pcm_oss_file->streams[idx];
2507 if (substream != NULL)
2508 break;
2509 }
2510 if (snd_BUG_ON(idx >= 2))
2511 return -ENXIO;
2512 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2513 }
2514 #endif
2515 if (((cmd >> 8) & 0xff) != 'P')
2516 return -EINVAL;
2517 #ifdef OSS_DEBUG
2518 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2519 #endif
2520 switch (cmd) {
2521 case SNDCTL_DSP_RESET:
2522 return snd_pcm_oss_reset(pcm_oss_file);
2523 case SNDCTL_DSP_SYNC:
2524 return snd_pcm_oss_sync(pcm_oss_file);
2525 case SNDCTL_DSP_SPEED:
2526 if (get_user(res, p))
2527 return -EFAULT;
2528 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2529 return res;
2530 return put_user(res, p);
2531 case SOUND_PCM_READ_RATE:
2532 res = snd_pcm_oss_get_rate(pcm_oss_file);
2533 if (res < 0)
2534 return res;
2535 return put_user(res, p);
2536 case SNDCTL_DSP_STEREO:
2537 if (get_user(res, p))
2538 return -EFAULT;
2539 res = res > 0 ? 2 : 1;
2540 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2541 return res;
2542 return put_user(--res, p);
2543 case SNDCTL_DSP_GETBLKSIZE:
2544 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2545 if (res < 0)
2546 return res;
2547 return put_user(res, p);
2548 case SNDCTL_DSP_SETFMT:
2549 if (get_user(res, p))
2550 return -EFAULT;
2551 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2552 if (res < 0)
2553 return res;
2554 return put_user(res, p);
2555 case SOUND_PCM_READ_BITS:
2556 res = snd_pcm_oss_get_format(pcm_oss_file);
2557 if (res < 0)
2558 return res;
2559 return put_user(res, p);
2560 case SNDCTL_DSP_CHANNELS:
2561 if (get_user(res, p))
2562 return -EFAULT;
2563 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2564 if (res < 0)
2565 return res;
2566 return put_user(res, p);
2567 case SOUND_PCM_READ_CHANNELS:
2568 res = snd_pcm_oss_get_channels(pcm_oss_file);
2569 if (res < 0)
2570 return res;
2571 return put_user(res, p);
2572 case SOUND_PCM_WRITE_FILTER:
2573 case SOUND_PCM_READ_FILTER:
2574 return -EIO;
2575 case SNDCTL_DSP_POST:
2576 return snd_pcm_oss_post(pcm_oss_file);
2577 case SNDCTL_DSP_SUBDIVIDE:
2578 if (get_user(res, p))
2579 return -EFAULT;
2580 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2581 if (res < 0)
2582 return res;
2583 return put_user(res, p);
2584 case SNDCTL_DSP_SETFRAGMENT:
2585 if (get_user(res, p))
2586 return -EFAULT;
2587 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2588 case SNDCTL_DSP_GETFMTS:
2589 res = snd_pcm_oss_get_formats(pcm_oss_file);
2590 if (res < 0)
2591 return res;
2592 return put_user(res, p);
2593 case SNDCTL_DSP_GETOSPACE:
2594 case SNDCTL_DSP_GETISPACE:
2595 return snd_pcm_oss_get_space(pcm_oss_file,
2596 cmd == SNDCTL_DSP_GETISPACE ?
2597 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2598 (struct audio_buf_info __user *) arg);
2599 case SNDCTL_DSP_NONBLOCK:
2600 return snd_pcm_oss_nonblock(file);
2601 case SNDCTL_DSP_GETCAPS:
2602 res = snd_pcm_oss_get_caps(pcm_oss_file);
2603 if (res < 0)
2604 return res;
2605 return put_user(res, p);
2606 case SNDCTL_DSP_GETTRIGGER:
2607 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2608 if (res < 0)
2609 return res;
2610 return put_user(res, p);
2611 case SNDCTL_DSP_SETTRIGGER:
2612 if (get_user(res, p))
2613 return -EFAULT;
2614 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2615 case SNDCTL_DSP_GETIPTR:
2616 case SNDCTL_DSP_GETOPTR:
2617 return snd_pcm_oss_get_ptr(pcm_oss_file,
2618 cmd == SNDCTL_DSP_GETIPTR ?
2619 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2620 (struct count_info __user *) arg);
2621 case SNDCTL_DSP_MAPINBUF:
2622 case SNDCTL_DSP_MAPOUTBUF:
2623 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2624 cmd == SNDCTL_DSP_MAPINBUF ?
2625 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2626 (struct buffmem_desc __user *) arg);
2627 case SNDCTL_DSP_SETSYNCRO:
2628 /* stop DMA now.. */
2629 return 0;
2630 case SNDCTL_DSP_SETDUPLEX:
2631 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2632 return 0;
2633 return -EIO;
2634 case SNDCTL_DSP_GETODELAY:
2635 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2636 if (res < 0) {
2637 /* it's for sure, some broken apps don't check for error codes */
2638 put_user(0, p);
2639 return res;
2640 }
2641 return put_user(res, p);
2642 case SNDCTL_DSP_PROFILE:
2643 return 0; /* silently ignore */
2644 default:
2645 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2646 }
2647 return -EINVAL;
2648 }
2649
2650 #ifdef CONFIG_COMPAT
2651 /* all compatible */
2652 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2653 #else
2654 #define snd_pcm_oss_ioctl_compat NULL
2655 #endif
2656
2657 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2658 {
2659 struct snd_pcm_oss_file *pcm_oss_file;
2660 struct snd_pcm_substream *substream;
2661
2662 pcm_oss_file = file->private_data;
2663 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2664 if (substream == NULL)
2665 return -ENXIO;
2666 substream->f_flags = file->f_flags & O_NONBLOCK;
2667 #ifndef OSS_DEBUG
2668 return snd_pcm_oss_read1(substream, buf, count);
2669 #else
2670 {
2671 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2672 pcm_dbg(substream->pcm,
2673 "pcm_oss: read %li bytes (returned %li bytes)\n",
2674 (long)count, (long)res);
2675 return res;
2676 }
2677 #endif
2678 }
2679
2680 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2681 {
2682 struct snd_pcm_oss_file *pcm_oss_file;
2683 struct snd_pcm_substream *substream;
2684 long result;
2685
2686 pcm_oss_file = file->private_data;
2687 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2688 if (substream == NULL)
2689 return -ENXIO;
2690 substream->f_flags = file->f_flags & O_NONBLOCK;
2691 result = snd_pcm_oss_write1(substream, buf, count);
2692 #ifdef OSS_DEBUG
2693 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2694 (long)count, (long)result);
2695 #endif
2696 return result;
2697 }
2698
2699 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2700 {
2701 struct snd_pcm_runtime *runtime = substream->runtime;
2702 if (atomic_read(&substream->mmap_count))
2703 return runtime->oss.prev_hw_ptr_period !=
2704 get_hw_ptr_period(runtime);
2705 else
2706 return snd_pcm_playback_avail(runtime) >=
2707 runtime->oss.period_frames;
2708 }
2709
2710 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2711 {
2712 struct snd_pcm_runtime *runtime = substream->runtime;
2713 if (atomic_read(&substream->mmap_count))
2714 return runtime->oss.prev_hw_ptr_period !=
2715 get_hw_ptr_period(runtime);
2716 else
2717 return snd_pcm_capture_avail(runtime) >=
2718 runtime->oss.period_frames;
2719 }
2720
2721 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2722 {
2723 struct snd_pcm_oss_file *pcm_oss_file;
2724 unsigned int mask;
2725 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2726
2727 pcm_oss_file = file->private_data;
2728
2729 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2730 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2731
2732 mask = 0;
2733 if (psubstream != NULL) {
2734 struct snd_pcm_runtime *runtime = psubstream->runtime;
2735 poll_wait(file, &runtime->sleep, wait);
2736 snd_pcm_stream_lock_irq(psubstream);
2737 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2738 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2739 snd_pcm_oss_playback_ready(psubstream)))
2740 mask |= POLLOUT | POLLWRNORM;
2741 snd_pcm_stream_unlock_irq(psubstream);
2742 }
2743 if (csubstream != NULL) {
2744 struct snd_pcm_runtime *runtime = csubstream->runtime;
2745 snd_pcm_state_t ostate;
2746 poll_wait(file, &runtime->sleep, wait);
2747 snd_pcm_stream_lock_irq(csubstream);
2748 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2749 snd_pcm_oss_capture_ready(csubstream))
2750 mask |= POLLIN | POLLRDNORM;
2751 snd_pcm_stream_unlock_irq(csubstream);
2752 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2753 struct snd_pcm_oss_file ofile;
2754 memset(&ofile, 0, sizeof(ofile));
2755 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2756 runtime->oss.trigger = 0;
2757 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2758 }
2759 }
2760
2761 return mask;
2762 }
2763
2764 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2765 {
2766 struct snd_pcm_oss_file *pcm_oss_file;
2767 struct snd_pcm_substream *substream = NULL;
2768 struct snd_pcm_runtime *runtime;
2769 int err;
2770
2771 #ifdef OSS_DEBUG
2772 pr_debug("pcm_oss: mmap begin\n");
2773 #endif
2774 pcm_oss_file = file->private_data;
2775 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2776 case VM_READ | VM_WRITE:
2777 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2778 if (substream)
2779 break;
2780 /* Fall through */
2781 case VM_READ:
2782 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2783 break;
2784 case VM_WRITE:
2785 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2786 break;
2787 default:
2788 return -EINVAL;
2789 }
2790 /* set VM_READ access as well to fix memset() routines that do
2791 reads before writes (to improve performance) */
2792 area->vm_flags |= VM_READ;
2793 if (substream == NULL)
2794 return -ENXIO;
2795 runtime = substream->runtime;
2796 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2797 return -EIO;
2798 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2799 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2800 else
2801 return -EIO;
2802
2803 if (runtime->oss.params) {
2804 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2805 return err;
2806 }
2807 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2808 if (runtime->oss.plugin_first != NULL)
2809 return -EIO;
2810 #endif
2811
2812 if (area->vm_pgoff != 0)
2813 return -EINVAL;
2814
2815 err = snd_pcm_mmap_data(substream, file, area);
2816 if (err < 0)
2817 return err;
2818 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2819 runtime->silence_threshold = 0;
2820 runtime->silence_size = 0;
2821 #ifdef OSS_DEBUG
2822 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2823 runtime->oss.mmap_bytes);
2824 #endif
2825 /* In mmap mode we never stop */
2826 runtime->stop_threshold = runtime->boundary;
2827
2828 return 0;
2829 }
2830
2831 #ifdef CONFIG_SND_VERBOSE_PROCFS
2832 /*
2833 * /proc interface
2834 */
2835
2836 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2837 struct snd_info_buffer *buffer)
2838 {
2839 struct snd_pcm_str *pstr = entry->private_data;
2840 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2841 mutex_lock(&pstr->oss.setup_mutex);
2842 while (setup) {
2843 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2844 setup->task_name,
2845 setup->periods,
2846 setup->period_size,
2847 setup->disable ? " disable" : "",
2848 setup->direct ? " direct" : "",
2849 setup->block ? " block" : "",
2850 setup->nonblock ? " non-block" : "",
2851 setup->partialfrag ? " partial-frag" : "",
2852 setup->nosilence ? " no-silence" : "");
2853 setup = setup->next;
2854 }
2855 mutex_unlock(&pstr->oss.setup_mutex);
2856 }
2857
2858 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2859 {
2860 struct snd_pcm_oss_setup *setup, *setupn;
2861
2862 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2863 setup; setup = setupn) {
2864 setupn = setup->next;
2865 kfree(setup->task_name);
2866 kfree(setup);
2867 }
2868 pstr->oss.setup_list = NULL;
2869 }
2870
2871 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2872 struct snd_info_buffer *buffer)
2873 {
2874 struct snd_pcm_str *pstr = entry->private_data;
2875 char line[128], str[32], task_name[32];
2876 const char *ptr;
2877 int idx1;
2878 struct snd_pcm_oss_setup *setup, *setup1, template;
2879
2880 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2881 mutex_lock(&pstr->oss.setup_mutex);
2882 memset(&template, 0, sizeof(template));
2883 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2884 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2885 snd_pcm_oss_proc_free_setup_list(pstr);
2886 mutex_unlock(&pstr->oss.setup_mutex);
2887 continue;
2888 }
2889 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2890 if (!strcmp(setup->task_name, task_name)) {
2891 template = *setup;
2892 break;
2893 }
2894 }
2895 ptr = snd_info_get_str(str, ptr, sizeof(str));
2896 template.periods = simple_strtoul(str, NULL, 10);
2897 ptr = snd_info_get_str(str, ptr, sizeof(str));
2898 template.period_size = simple_strtoul(str, NULL, 10);
2899 for (idx1 = 31; idx1 >= 0; idx1--)
2900 if (template.period_size & (1 << idx1))
2901 break;
2902 for (idx1--; idx1 >= 0; idx1--)
2903 template.period_size &= ~(1 << idx1);
2904 do {
2905 ptr = snd_info_get_str(str, ptr, sizeof(str));
2906 if (!strcmp(str, "disable")) {
2907 template.disable = 1;
2908 } else if (!strcmp(str, "direct")) {
2909 template.direct = 1;
2910 } else if (!strcmp(str, "block")) {
2911 template.block = 1;
2912 } else if (!strcmp(str, "non-block")) {
2913 template.nonblock = 1;
2914 } else if (!strcmp(str, "partial-frag")) {
2915 template.partialfrag = 1;
2916 } else if (!strcmp(str, "no-silence")) {
2917 template.nosilence = 1;
2918 } else if (!strcmp(str, "buggy-ptr")) {
2919 template.buggyptr = 1;
2920 }
2921 } while (*str);
2922 if (setup == NULL) {
2923 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2924 if (! setup) {
2925 buffer->error = -ENOMEM;
2926 mutex_unlock(&pstr->oss.setup_mutex);
2927 return;
2928 }
2929 if (pstr->oss.setup_list == NULL)
2930 pstr->oss.setup_list = setup;
2931 else {
2932 for (setup1 = pstr->oss.setup_list;
2933 setup1->next; setup1 = setup1->next);
2934 setup1->next = setup;
2935 }
2936 template.task_name = kstrdup(task_name, GFP_KERNEL);
2937 if (! template.task_name) {
2938 kfree(setup);
2939 buffer->error = -ENOMEM;
2940 mutex_unlock(&pstr->oss.setup_mutex);
2941 return;
2942 }
2943 }
2944 *setup = template;
2945 mutex_unlock(&pstr->oss.setup_mutex);
2946 }
2947 }
2948
2949 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2950 {
2951 int stream;
2952 for (stream = 0; stream < 2; ++stream) {
2953 struct snd_info_entry *entry;
2954 struct snd_pcm_str *pstr = &pcm->streams[stream];
2955 if (pstr->substream_count == 0)
2956 continue;
2957 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2958 entry->content = SNDRV_INFO_CONTENT_TEXT;
2959 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2960 entry->c.text.read = snd_pcm_oss_proc_read;
2961 entry->c.text.write = snd_pcm_oss_proc_write;
2962 entry->private_data = pstr;
2963 if (snd_info_register(entry) < 0) {
2964 snd_info_free_entry(entry);
2965 entry = NULL;
2966 }
2967 }
2968 pstr->oss.proc_entry = entry;
2969 }
2970 }
2971
2972 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2973 {
2974 int stream;
2975 for (stream = 0; stream < 2; ++stream) {
2976 struct snd_pcm_str *pstr = &pcm->streams[stream];
2977 snd_info_free_entry(pstr->oss.proc_entry);
2978 pstr->oss.proc_entry = NULL;
2979 snd_pcm_oss_proc_free_setup_list(pstr);
2980 }
2981 }
2982 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2983 #define snd_pcm_oss_proc_init(pcm)
2984 #define snd_pcm_oss_proc_done(pcm)
2985 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2986
2987 /*
2988 * ENTRY functions
2989 */
2990
2991 static const struct file_operations snd_pcm_oss_f_reg =
2992 {
2993 .owner = THIS_MODULE,
2994 .read = snd_pcm_oss_read,
2995 .write = snd_pcm_oss_write,
2996 .open = snd_pcm_oss_open,
2997 .release = snd_pcm_oss_release,
2998 .llseek = no_llseek,
2999 .poll = snd_pcm_oss_poll,
3000 .unlocked_ioctl = snd_pcm_oss_ioctl,
3001 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3002 .mmap = snd_pcm_oss_mmap,
3003 };
3004
3005 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3006 {
3007 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3008 pcm->card, index, &snd_pcm_oss_f_reg,
3009 pcm) < 0) {
3010 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3011 pcm->card->number, pcm->device);
3012 }
3013 }
3014
3015 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3016 {
3017 pcm->oss.reg = 0;
3018 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3019 char name[128];
3020 int duplex;
3021 register_oss_dsp(pcm, 0);
3022 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3023 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3024 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3025 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3026 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3027 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3028 pcm->card->number,
3029 name);
3030 #endif
3031 pcm->oss.reg++;
3032 pcm->oss.reg_mask |= 1;
3033 }
3034 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3035 register_oss_dsp(pcm, 1);
3036 pcm->oss.reg++;
3037 pcm->oss.reg_mask |= 2;
3038 }
3039
3040 if (pcm->oss.reg)
3041 snd_pcm_oss_proc_init(pcm);
3042
3043 return 0;
3044 }
3045
3046 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3047 {
3048 if (pcm->oss.reg) {
3049 if (pcm->oss.reg_mask & 1) {
3050 pcm->oss.reg_mask &= ~1;
3051 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3052 pcm->card, 0);
3053 }
3054 if (pcm->oss.reg_mask & 2) {
3055 pcm->oss.reg_mask &= ~2;
3056 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3057 pcm->card, 1);
3058 }
3059 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3060 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3061 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3062 #endif
3063 }
3064 pcm->oss.reg = 0;
3065 }
3066 return 0;
3067 }
3068
3069 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3070 {
3071 snd_pcm_oss_disconnect_minor(pcm);
3072 snd_pcm_oss_proc_done(pcm);
3073 return 0;
3074 }
3075
3076 static struct snd_pcm_notify snd_pcm_oss_notify =
3077 {
3078 .n_register = snd_pcm_oss_register_minor,
3079 .n_disconnect = snd_pcm_oss_disconnect_minor,
3080 .n_unregister = snd_pcm_oss_unregister_minor,
3081 };
3082
3083 static int __init alsa_pcm_oss_init(void)
3084 {
3085 int i;
3086 int err;
3087
3088 /* check device map table */
3089 for (i = 0; i < SNDRV_CARDS; i++) {
3090 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3091 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3092 i, dsp_map[i]);
3093 dsp_map[i] = 0;
3094 }
3095 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3096 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3097 i, adsp_map[i]);
3098 adsp_map[i] = 1;
3099 }
3100 }
3101 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3102 return err;
3103 return 0;
3104 }
3105
3106 static void __exit alsa_pcm_oss_exit(void)
3107 {
3108 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3109 }
3110
3111 module_init(alsa_pcm_oss_init)
3112 module_exit(alsa_pcm_oss_exit)
Michael's Linux tree.