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Fix region size check in mpc5200 FEC driver
[linux-2.6/libata-dev.git] / sound / core / oss / pcm_oss.c
blobd0c4ceb9f0b4e55efaff4e16dc2fc585df81a3a4
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 <sound/driver.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/time.h>
33 #include <linux/vmalloc.h>
34 #include <linux/moduleparam.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44
45 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47 static int dsp_map[SNDRV_CARDS];
48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49 static int nonblock_open = 1;
50
51 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53 MODULE_LICENSE("GPL");
54 module_param_array(dsp_map, int, NULL, 0444);
55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56 module_param_array(adsp_map, int, NULL, 0444);
57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58 module_param(nonblock_open, bool, 0644);
59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 /*
81 * helper functions to process hw_params
82 */
83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84 {
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105 }
106
107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108 {
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129 }
130
131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132 {
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139 }
140
141 /**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149 static unsigned int
150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152 {
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165 }
166
167 /**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175 static unsigned int
176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178 {
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191 }
192
193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196 {
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204 }
205
206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210 {
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220 }
221
222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225 {
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251 }
252
253 /**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269 {
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279 }
280
281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284 {
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312 }
313
314 /**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330 {
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340 }
341
342 static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345 {
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356 }
357
358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360 {
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372 }
373
374 /* Return 1 if min is nearer to best than max */
375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378 {
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384 }
385
386 /**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404 {
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 snd_assert(max >= 0, return -EINVAL);
457 last = 1;
458 }
459 _end:
460 kfree(save);
461 if (last)
462 v = snd_pcm_hw_param_last(pcm, params, var, dir);
463 else
464 v = snd_pcm_hw_param_first(pcm, params, var, dir);
465 snd_assert(v >= 0, return -EINVAL);
466 return v;
467 }
468
469 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
470 snd_pcm_hw_param_t var, unsigned int val,
471 int dir)
472 {
473 int changed;
474 if (hw_is_mask(var)) {
475 struct snd_mask *m = hw_param_mask(params, var);
476 if (val == 0 && dir < 0) {
477 changed = -EINVAL;
478 snd_mask_none(m);
479 } else {
480 if (dir > 0)
481 val++;
482 else if (dir < 0)
483 val--;
484 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
485 }
486 } else if (hw_is_interval(var)) {
487 struct snd_interval *i = hw_param_interval(params, var);
488 if (val == 0 && dir < 0) {
489 changed = -EINVAL;
490 snd_interval_none(i);
491 } else if (dir == 0)
492 changed = snd_interval_refine_set(i, val);
493 else {
494 struct snd_interval t;
495 t.openmin = 1;
496 t.openmax = 1;
497 t.empty = 0;
498 t.integer = 0;
499 if (dir < 0) {
500 t.min = val - 1;
501 t.max = val;
502 } else {
503 t.min = val;
504 t.max = val+1;
505 }
506 changed = snd_interval_refine(i, &t);
507 }
508 } else
509 return -EINVAL;
510 if (changed) {
511 params->cmask |= 1 << var;
512 params->rmask |= 1 << var;
513 }
514 return changed;
515 }
516
517 /**
518 * snd_pcm_hw_param_set
519 * @pcm: PCM instance
520 * @params: the hw_params instance
521 * @var: parameter to retrieve
522 * @val: value to set
523 * @dir: pointer to the direction (-1,0,1) or NULL
524 *
525 * Inside configuration space defined by PARAMS remove from PAR all
526 * values != VAL. Reduce configuration space accordingly.
527 * Return VAL or -EINVAL if the configuration space is empty
528 */
529 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
530 struct snd_pcm_hw_params *params,
531 snd_pcm_hw_param_t var, unsigned int val,
532 int dir)
533 {
534 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
535 if (changed < 0)
536 return changed;
537 if (params->rmask) {
538 int err = snd_pcm_hw_refine(pcm, params);
539 if (err < 0)
540 return err;
541 }
542 return snd_pcm_hw_param_value(params, var, NULL);
543 }
544
545 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
546 snd_pcm_hw_param_t var)
547 {
548 int changed;
549 changed = snd_interval_setinteger(hw_param_interval(params, var));
550 if (changed) {
551 params->cmask |= 1 << var;
552 params->rmask |= 1 << var;
553 }
554 return changed;
555 }
556
557 /*
558 * plugin
559 */
560
561 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
562 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
563 {
564 struct snd_pcm_runtime *runtime = substream->runtime;
565 struct snd_pcm_plugin *plugin, *next;
566
567 plugin = runtime->oss.plugin_first;
568 while (plugin) {
569 next = plugin->next;
570 snd_pcm_plugin_free(plugin);
571 plugin = next;
572 }
573 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
574 return 0;
575 }
576
577 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
578 {
579 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
580 plugin->next = runtime->oss.plugin_first;
581 plugin->prev = NULL;
582 if (runtime->oss.plugin_first) {
583 runtime->oss.plugin_first->prev = plugin;
584 runtime->oss.plugin_first = plugin;
585 } else {
586 runtime->oss.plugin_last =
587 runtime->oss.plugin_first = plugin;
588 }
589 return 0;
590 }
591
592 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
593 {
594 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
595 plugin->next = NULL;
596 plugin->prev = runtime->oss.plugin_last;
597 if (runtime->oss.plugin_last) {
598 runtime->oss.plugin_last->next = plugin;
599 runtime->oss.plugin_last = plugin;
600 } else {
601 runtime->oss.plugin_last =
602 runtime->oss.plugin_first = plugin;
603 }
604 return 0;
605 }
606 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
607
608 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
609 {
610 struct snd_pcm_runtime *runtime = substream->runtime;
611 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
612 long bytes = frames_to_bytes(runtime, frames);
613 if (buffer_size == runtime->oss.buffer_bytes)
614 return bytes;
615 #if BITS_PER_LONG >= 64
616 return runtime->oss.buffer_bytes * bytes / buffer_size;
617 #else
618 {
619 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
620 u32 rem;
621 div64_32(&bsize, buffer_size, &rem);
622 return (long)bsize;
623 }
624 #endif
625 }
626
627 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
628 {
629 struct snd_pcm_runtime *runtime = substream->runtime;
630 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
631 if (buffer_size == runtime->oss.buffer_bytes)
632 return bytes_to_frames(runtime, bytes);
633 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
634 }
635
636 /* define extended formats in the recent OSS versions (if any) */
637 /* linear formats */
638 #define AFMT_S32_LE 0x00001000
639 #define AFMT_S32_BE 0x00002000
640 #define AFMT_S24_LE 0x00008000
641 #define AFMT_S24_BE 0x00010000
642 #define AFMT_S24_PACKED 0x00040000
643
644 /* other supported formats */
645 #define AFMT_FLOAT 0x00004000
646 #define AFMT_SPDIF_RAW 0x00020000
647
648 /* unsupported formats */
649 #define AFMT_AC3 0x00000400
650 #define AFMT_VORBIS 0x00000800
651
652 static int snd_pcm_oss_format_from(int format)
653 {
654 switch (format) {
655 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
656 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
657 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
658 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
659 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
660 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
661 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
662 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
663 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
664 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
665 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
666 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
667 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
668 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
669 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
670 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
671 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
672 default: return SNDRV_PCM_FORMAT_U8;
673 }
674 }
675
676 static int snd_pcm_oss_format_to(int format)
677 {
678 switch (format) {
679 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
680 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
681 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
682 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
683 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
684 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
685 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
686 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
687 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
688 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
689 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
690 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
691 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
692 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
693 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
694 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
695 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
696 default: return -EINVAL;
697 }
698 }
699
700 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
701 struct snd_pcm_hw_params *oss_params,
702 struct snd_pcm_hw_params *slave_params)
703 {
704 size_t s;
705 size_t oss_buffer_size, oss_period_size, oss_periods;
706 size_t min_period_size, max_period_size;
707 struct snd_pcm_runtime *runtime = substream->runtime;
708 size_t oss_frame_size;
709
710 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
711 params_channels(oss_params) / 8;
712
713 oss_buffer_size = snd_pcm_plug_client_size(substream,
714 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
715 oss_buffer_size = 1 << ld2(oss_buffer_size);
716 if (atomic_read(&substream->mmap_count)) {
717 if (oss_buffer_size > runtime->oss.mmap_bytes)
718 oss_buffer_size = runtime->oss.mmap_bytes;
719 }
720
721 if (substream->oss.setup.period_size > 16)
722 oss_period_size = substream->oss.setup.period_size;
723 else if (runtime->oss.fragshift) {
724 oss_period_size = 1 << runtime->oss.fragshift;
725 if (oss_period_size > oss_buffer_size / 2)
726 oss_period_size = oss_buffer_size / 2;
727 } else {
728 int sd;
729 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
730
731 oss_period_size = oss_buffer_size;
732 do {
733 oss_period_size /= 2;
734 } while (oss_period_size > bytes_per_sec);
735 if (runtime->oss.subdivision == 0) {
736 sd = 4;
737 if (oss_period_size / sd > 4096)
738 sd *= 2;
739 if (oss_period_size / sd < 4096)
740 sd = 1;
741 } else
742 sd = runtime->oss.subdivision;
743 oss_period_size /= sd;
744 if (oss_period_size < 16)
745 oss_period_size = 16;
746 }
747
748 min_period_size = snd_pcm_plug_client_size(substream,
749 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
750 min_period_size *= oss_frame_size;
751 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
752 if (oss_period_size < min_period_size)
753 oss_period_size = min_period_size;
754
755 max_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 max_period_size *= oss_frame_size;
758 max_period_size = 1 << ld2(max_period_size);
759 if (oss_period_size > max_period_size)
760 oss_period_size = max_period_size;
761
762 oss_periods = oss_buffer_size / oss_period_size;
763
764 if (substream->oss.setup.periods > 1)
765 oss_periods = substream->oss.setup.periods;
766
767 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
768 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
769 s = runtime->oss.maxfrags;
770 if (oss_periods > s)
771 oss_periods = s;
772
773 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
774 if (s < 2)
775 s = 2;
776 if (oss_periods < s)
777 oss_periods = s;
778
779 while (oss_period_size * oss_periods > oss_buffer_size)
780 oss_period_size /= 2;
781
782 snd_assert(oss_period_size >= 16, return -EINVAL);
783 runtime->oss.period_bytes = oss_period_size;
784 runtime->oss.period_frames = 1;
785 runtime->oss.periods = oss_periods;
786 return 0;
787 }
788
789 static int choose_rate(struct snd_pcm_substream *substream,
790 struct snd_pcm_hw_params *params, unsigned int best_rate)
791 {
792 struct snd_interval *it;
793 struct snd_pcm_hw_params *save;
794 unsigned int rate, prev;
795
796 save = kmalloc(sizeof(*save), GFP_KERNEL);
797 if (save == NULL)
798 return -ENOMEM;
799 *save = *params;
800 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
801
802 /* try multiples of the best rate */
803 rate = best_rate;
804 for (;;) {
805 if (it->max < rate || (it->max == rate && it->openmax))
806 break;
807 if (it->min < rate || (it->min == rate && !it->openmin)) {
808 int ret;
809 ret = snd_pcm_hw_param_set(substream, params,
810 SNDRV_PCM_HW_PARAM_RATE,
811 rate, 0);
812 if (ret == (int)rate) {
813 kfree(save);
814 return rate;
815 }
816 *params = *save;
817 }
818 prev = rate;
819 rate += best_rate;
820 if (rate <= prev)
821 break;
822 }
823
824 /* not found, use the nearest rate */
825 kfree(save);
826 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
827 }
828
829 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
830 {
831 struct snd_pcm_runtime *runtime = substream->runtime;
832 struct snd_pcm_hw_params *params, *sparams;
833 struct snd_pcm_sw_params *sw_params;
834 ssize_t oss_buffer_size, oss_period_size;
835 size_t oss_frame_size;
836 int err;
837 int direct;
838 int format, sformat, n;
839 struct snd_mask sformat_mask;
840 struct snd_mask mask;
841
842 if (mutex_lock_interruptible(&runtime->oss.params_lock))
843 return -EINTR;
844 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
845 params = kmalloc(sizeof(*params), GFP_KERNEL);
846 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
847 if (!sw_params || !params || !sparams) {
848 snd_printd("No memory\n");
849 err = -ENOMEM;
850 goto failure;
851 }
852
853 if (atomic_read(&substream->mmap_count))
854 direct = 1;
855 else
856 direct = substream->oss.setup.direct;
857
858 _snd_pcm_hw_params_any(sparams);
859 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
860 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
861 snd_mask_none(&mask);
862 if (atomic_read(&substream->mmap_count))
863 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
864 else {
865 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
866 if (!direct)
867 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
868 }
869 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
870 if (err < 0) {
871 snd_printd("No usable accesses\n");
872 err = -EINVAL;
873 goto failure;
874 }
875 choose_rate(substream, sparams, runtime->oss.rate);
876 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
877
878 format = snd_pcm_oss_format_from(runtime->oss.format);
879
880 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
881 if (direct)
882 sformat = format;
883 else
884 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
885
886 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
887 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
888 if (snd_mask_test(&sformat_mask, sformat) &&
889 snd_pcm_oss_format_to(sformat) >= 0)
890 break;
891 }
892 if (sformat > SNDRV_PCM_FORMAT_LAST) {
893 snd_printd("Cannot find a format!!!\n");
894 err = -EINVAL;
895 goto failure;
896 }
897 }
898 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
899 snd_assert(err >= 0, goto failure);
900
901 if (direct) {
902 memcpy(params, sparams, sizeof(*params));
903 } else {
904 _snd_pcm_hw_params_any(params);
905 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
906 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
907 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
908 snd_pcm_oss_format_from(runtime->oss.format), 0);
909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
910 runtime->oss.channels, 0);
911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
912 runtime->oss.rate, 0);
913 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
914 params_access(params), params_format(params),
915 params_channels(params), params_rate(params));
916 }
917 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
918 params_access(sparams), params_format(sparams),
919 params_channels(sparams), params_rate(sparams));
920
921 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
922 params_channels(params) / 8;
923
924 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
925 snd_pcm_oss_plugin_clear(substream);
926 if (!direct) {
927 /* add necessary plugins */
928 snd_pcm_oss_plugin_clear(substream);
929 if ((err = snd_pcm_plug_format_plugins(substream,
930 params,
931 sparams)) < 0) {
932 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
933 snd_pcm_oss_plugin_clear(substream);
934 goto failure;
935 }
936 if (runtime->oss.plugin_first) {
937 struct snd_pcm_plugin *plugin;
938 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
939 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
940 snd_pcm_oss_plugin_clear(substream);
941 goto failure;
942 }
943 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
944 err = snd_pcm_plugin_append(plugin);
945 } else {
946 err = snd_pcm_plugin_insert(plugin);
947 }
948 if (err < 0) {
949 snd_pcm_oss_plugin_clear(substream);
950 goto failure;
951 }
952 }
953 }
954 #endif
955
956 err = snd_pcm_oss_period_size(substream, params, sparams);
957 if (err < 0)
958 goto failure;
959
960 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
961 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
962 snd_assert(err >= 0, goto failure);
963
964 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
965 runtime->oss.periods, NULL);
966 snd_assert(err >= 0, goto failure);
967
968 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
969
970 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
971 snd_printd("HW_PARAMS failed: %i\n", err);
972 goto failure;
973 }
974
975 memset(sw_params, 0, sizeof(*sw_params));
976 if (runtime->oss.trigger) {
977 sw_params->start_threshold = 1;
978 } else {
979 sw_params->start_threshold = runtime->boundary;
980 }
981 if (atomic_read(&substream->mmap_count) ||
982 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
983 sw_params->stop_threshold = runtime->boundary;
984 else
985 sw_params->stop_threshold = runtime->buffer_size;
986 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
987 sw_params->period_step = 1;
988 sw_params->sleep_min = 0;
989 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
990 1 : runtime->period_size;
991 sw_params->xfer_align = 1;
992 if (atomic_read(&substream->mmap_count) ||
993 substream->oss.setup.nosilence) {
994 sw_params->silence_threshold = 0;
995 sw_params->silence_size = 0;
996 } else {
997 snd_pcm_uframes_t frames;
998 frames = runtime->period_size + 16;
999 if (frames > runtime->buffer_size)
1000 frames = runtime->buffer_size;
1001 sw_params->silence_threshold = frames;
1002 sw_params->silence_size = frames;
1003 }
1004
1005 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1006 snd_printd("SW_PARAMS failed: %i\n", err);
1007 goto failure;
1008 }
1009
1010 runtime->oss.periods = params_periods(sparams);
1011 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1012 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
1013 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1014 if (runtime->oss.plugin_first) {
1015 err = snd_pcm_plug_alloc(substream, oss_period_size);
1016 if (err < 0)
1017 goto failure;
1018 }
1019 #endif
1020 oss_period_size *= oss_frame_size;
1021
1022 oss_buffer_size = oss_period_size * runtime->oss.periods;
1023 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
1024
1025 runtime->oss.period_bytes = oss_period_size;
1026 runtime->oss.buffer_bytes = oss_buffer_size;
1027
1028 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1029 runtime->oss.period_bytes,
1030 runtime->oss.buffer_bytes);
1031 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1032 params_period_size(sparams),
1033 params_buffer_size(sparams));
1034
1035 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1036 runtime->oss.channels = params_channels(params);
1037 runtime->oss.rate = params_rate(params);
1038
1039 runtime->oss.params = 0;
1040 runtime->oss.prepare = 1;
1041 vfree(runtime->oss.buffer);
1042 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1043 runtime->oss.buffer_used = 0;
1044 if (runtime->dma_area)
1045 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1046
1047 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1048
1049 err = 0;
1050 failure:
1051 kfree(sw_params);
1052 kfree(params);
1053 kfree(sparams);
1054 mutex_unlock(&runtime->oss.params_lock);
1055 return err;
1056 }
1057
1058 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1059 {
1060 int idx, err;
1061 struct snd_pcm_substream *asubstream = NULL, *substream;
1062
1063 for (idx = 0; idx < 2; idx++) {
1064 substream = pcm_oss_file->streams[idx];
1065 if (substream == NULL)
1066 continue;
1067 if (asubstream == NULL)
1068 asubstream = substream;
1069 if (substream->runtime->oss.params) {
1070 err = snd_pcm_oss_change_params(substream);
1071 if (err < 0)
1072 return err;
1073 }
1074 }
1075 snd_assert(asubstream != NULL, return -EIO);
1076 if (r_substream)
1077 *r_substream = asubstream;
1078 return 0;
1079 }
1080
1081 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1082 {
1083 int err;
1084 struct snd_pcm_runtime *runtime = substream->runtime;
1085
1086 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1087 if (err < 0) {
1088 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1089 return err;
1090 }
1091 runtime->oss.prepare = 0;
1092 runtime->oss.prev_hw_ptr_interrupt = 0;
1093 runtime->oss.period_ptr = 0;
1094 runtime->oss.buffer_used = 0;
1095
1096 return 0;
1097 }
1098
1099 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1100 {
1101 struct snd_pcm_runtime *runtime;
1102 int err;
1103
1104 if (substream == NULL)
1105 return 0;
1106 runtime = substream->runtime;
1107 if (runtime->oss.params) {
1108 err = snd_pcm_oss_change_params(substream);
1109 if (err < 0)
1110 return err;
1111 }
1112 if (runtime->oss.prepare) {
1113 err = snd_pcm_oss_prepare(substream);
1114 if (err < 0)
1115 return err;
1116 }
1117 return 0;
1118 }
1119
1120 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1121 {
1122 struct snd_pcm_runtime *runtime;
1123 snd_pcm_uframes_t frames;
1124 int err = 0;
1125
1126 while (1) {
1127 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1128 if (err < 0)
1129 break;
1130 runtime = substream->runtime;
1131 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1132 break;
1133 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1134 /* until avail(delay) <= buffer_size */
1135 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1136 frames /= runtime->period_size;
1137 frames *= runtime->period_size;
1138 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1139 if (err < 0)
1140 break;
1141 }
1142 return err;
1143 }
1144
1145 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1146 {
1147 struct snd_pcm_runtime *runtime = substream->runtime;
1148 int ret;
1149 while (1) {
1150 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1151 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1152 #ifdef OSS_DEBUG
1153 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1154 printk("pcm_oss: write: recovering from XRUN\n");
1155 else
1156 printk("pcm_oss: write: recovering from SUSPEND\n");
1157 #endif
1158 ret = snd_pcm_oss_prepare(substream);
1159 if (ret < 0)
1160 break;
1161 }
1162 if (in_kernel) {
1163 mm_segment_t fs;
1164 fs = snd_enter_user();
1165 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1166 snd_leave_user(fs);
1167 } else {
1168 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1169 }
1170 if (ret != -EPIPE && ret != -ESTRPIPE)
1171 break;
1172 /* test, if we can't store new data, because the stream */
1173 /* has not been started */
1174 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1175 return -EAGAIN;
1176 }
1177 return ret;
1178 }
1179
1180 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1181 {
1182 struct snd_pcm_runtime *runtime = substream->runtime;
1183 snd_pcm_sframes_t delay;
1184 int ret;
1185 while (1) {
1186 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1187 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1188 #ifdef OSS_DEBUG
1189 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1190 printk("pcm_oss: read: recovering from XRUN\n");
1191 else
1192 printk("pcm_oss: read: recovering from SUSPEND\n");
1193 #endif
1194 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1195 if (ret < 0)
1196 break;
1197 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1198 ret = snd_pcm_oss_prepare(substream);
1199 if (ret < 0)
1200 break;
1201 }
1202 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1203 if (ret < 0)
1204 break;
1205 if (in_kernel) {
1206 mm_segment_t fs;
1207 fs = snd_enter_user();
1208 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1209 snd_leave_user(fs);
1210 } else {
1211 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1212 }
1213 if (ret == -EPIPE) {
1214 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1215 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1216 if (ret < 0)
1217 break;
1218 }
1219 continue;
1220 }
1221 if (ret != -ESTRPIPE)
1222 break;
1223 }
1224 return ret;
1225 }
1226
1227 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1228 {
1229 struct snd_pcm_runtime *runtime = substream->runtime;
1230 int ret;
1231 while (1) {
1232 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1233 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1234 #ifdef OSS_DEBUG
1235 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1236 printk("pcm_oss: writev: recovering from XRUN\n");
1237 else
1238 printk("pcm_oss: writev: recovering from SUSPEND\n");
1239 #endif
1240 ret = snd_pcm_oss_prepare(substream);
1241 if (ret < 0)
1242 break;
1243 }
1244 if (in_kernel) {
1245 mm_segment_t fs;
1246 fs = snd_enter_user();
1247 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1248 snd_leave_user(fs);
1249 } else {
1250 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1251 }
1252 if (ret != -EPIPE && ret != -ESTRPIPE)
1253 break;
1254
1255 /* test, if we can't store new data, because the stream */
1256 /* has not been started */
1257 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1258 return -EAGAIN;
1259 }
1260 return ret;
1261 }
1262
1263 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1264 {
1265 struct snd_pcm_runtime *runtime = substream->runtime;
1266 int ret;
1267 while (1) {
1268 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1269 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1270 #ifdef OSS_DEBUG
1271 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1272 printk("pcm_oss: readv: recovering from XRUN\n");
1273 else
1274 printk("pcm_oss: readv: recovering from SUSPEND\n");
1275 #endif
1276 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1277 if (ret < 0)
1278 break;
1279 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1280 ret = snd_pcm_oss_prepare(substream);
1281 if (ret < 0)
1282 break;
1283 }
1284 if (in_kernel) {
1285 mm_segment_t fs;
1286 fs = snd_enter_user();
1287 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1288 snd_leave_user(fs);
1289 } else {
1290 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1291 }
1292 if (ret != -EPIPE && ret != -ESTRPIPE)
1293 break;
1294 }
1295 return ret;
1296 }
1297
1298 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1299 {
1300 struct snd_pcm_runtime *runtime = substream->runtime;
1301 snd_pcm_sframes_t frames, frames1;
1302 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1303 if (runtime->oss.plugin_first) {
1304 struct snd_pcm_plugin_channel *channels;
1305 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1306 if (!in_kernel) {
1307 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1308 return -EFAULT;
1309 buf = runtime->oss.buffer;
1310 }
1311 frames = bytes / oss_frame_bytes;
1312 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1313 if (frames1 < 0)
1314 return frames1;
1315 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1316 if (frames1 <= 0)
1317 return frames1;
1318 bytes = frames1 * oss_frame_bytes;
1319 } else
1320 #endif
1321 {
1322 frames = bytes_to_frames(runtime, bytes);
1323 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1324 if (frames1 <= 0)
1325 return frames1;
1326 bytes = frames_to_bytes(runtime, frames1);
1327 }
1328 return bytes;
1329 }
1330
1331 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1332 {
1333 size_t xfer = 0;
1334 ssize_t tmp;
1335 struct snd_pcm_runtime *runtime = substream->runtime;
1336
1337 if (atomic_read(&substream->mmap_count))
1338 return -ENXIO;
1339
1340 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1341 return tmp;
1342 mutex_lock(&runtime->oss.params_lock);
1343 while (bytes > 0) {
1344 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1345 tmp = bytes;
1346 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1347 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1348 if (tmp > 0) {
1349 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1350 tmp = -EFAULT;
1351 goto err;
1352 }
1353 }
1354 runtime->oss.buffer_used += tmp;
1355 buf += tmp;
1356 bytes -= tmp;
1357 xfer += tmp;
1358 if (substream->oss.setup.partialfrag ||
1359 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1360 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1361 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1362 if (tmp <= 0)
1363 goto err;
1364 runtime->oss.bytes += tmp;
1365 runtime->oss.period_ptr += tmp;
1366 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1367 if (runtime->oss.period_ptr == 0 ||
1368 runtime->oss.period_ptr == runtime->oss.buffer_used)
1369 runtime->oss.buffer_used = 0;
1370 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1371 tmp = -EAGAIN;
1372 goto err;
1373 }
1374 }
1375 } else {
1376 tmp = snd_pcm_oss_write2(substream,
1377 (const char __force *)buf,
1378 runtime->oss.period_bytes, 0);
1379 if (tmp <= 0)
1380 goto err;
1381 runtime->oss.bytes += tmp;
1382 buf += tmp;
1383 bytes -= tmp;
1384 xfer += tmp;
1385 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1386 tmp != runtime->oss.period_bytes)
1387 break;
1388 }
1389 }
1390 mutex_unlock(&runtime->oss.params_lock);
1391 return xfer;
1392
1393 err:
1394 mutex_unlock(&runtime->oss.params_lock);
1395 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1396 }
1397
1398 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1399 {
1400 struct snd_pcm_runtime *runtime = substream->runtime;
1401 snd_pcm_sframes_t frames, frames1;
1402 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1403 char __user *final_dst = (char __user *)buf;
1404 if (runtime->oss.plugin_first) {
1405 struct snd_pcm_plugin_channel *channels;
1406 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1407 if (!in_kernel)
1408 buf = runtime->oss.buffer;
1409 frames = bytes / oss_frame_bytes;
1410 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1411 if (frames1 < 0)
1412 return frames1;
1413 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1414 if (frames1 <= 0)
1415 return frames1;
1416 bytes = frames1 * oss_frame_bytes;
1417 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1418 return -EFAULT;
1419 } else
1420 #endif
1421 {
1422 frames = bytes_to_frames(runtime, bytes);
1423 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1424 if (frames1 <= 0)
1425 return frames1;
1426 bytes = frames_to_bytes(runtime, frames1);
1427 }
1428 return bytes;
1429 }
1430
1431 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1432 {
1433 size_t xfer = 0;
1434 ssize_t tmp;
1435 struct snd_pcm_runtime *runtime = substream->runtime;
1436
1437 if (atomic_read(&substream->mmap_count))
1438 return -ENXIO;
1439
1440 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1441 return tmp;
1442 mutex_lock(&runtime->oss.params_lock);
1443 while (bytes > 0) {
1444 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1445 if (runtime->oss.buffer_used == 0) {
1446 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1447 if (tmp <= 0)
1448 goto err;
1449 runtime->oss.bytes += tmp;
1450 runtime->oss.period_ptr = tmp;
1451 runtime->oss.buffer_used = tmp;
1452 }
1453 tmp = bytes;
1454 if ((size_t) tmp > runtime->oss.buffer_used)
1455 tmp = runtime->oss.buffer_used;
1456 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1457 tmp = -EFAULT;
1458 goto err;
1459 }
1460 buf += tmp;
1461 bytes -= tmp;
1462 xfer += tmp;
1463 runtime->oss.buffer_used -= tmp;
1464 } else {
1465 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1466 runtime->oss.period_bytes, 0);
1467 if (tmp <= 0)
1468 goto err;
1469 runtime->oss.bytes += tmp;
1470 buf += tmp;
1471 bytes -= tmp;
1472 xfer += tmp;
1473 }
1474 }
1475 mutex_unlock(&runtime->oss.params_lock);
1476 return xfer;
1477
1478 err:
1479 mutex_unlock(&runtime->oss.params_lock);
1480 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1481 }
1482
1483 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1484 {
1485 struct snd_pcm_substream *substream;
1486
1487 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1488 if (substream != NULL) {
1489 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1490 substream->runtime->oss.prepare = 1;
1491 }
1492 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1493 if (substream != NULL) {
1494 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1495 substream->runtime->oss.prepare = 1;
1496 }
1497 return 0;
1498 }
1499
1500 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1501 {
1502 struct snd_pcm_substream *substream;
1503 int err;
1504
1505 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1506 if (substream != NULL) {
1507 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1508 return err;
1509 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1510 }
1511 /* note: all errors from the start action are ignored */
1512 /* OSS apps do not know, how to handle them */
1513 return 0;
1514 }
1515
1516 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1517 {
1518 struct snd_pcm_runtime *runtime;
1519 ssize_t result = 0;
1520 long res;
1521 wait_queue_t wait;
1522
1523 runtime = substream->runtime;
1524 init_waitqueue_entry(&wait, current);
1525 add_wait_queue(&runtime->sleep, &wait);
1526 #ifdef OSS_DEBUG
1527 printk("sync1: size = %li\n", size);
1528 #endif
1529 while (1) {
1530 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1531 if (result > 0) {
1532 runtime->oss.buffer_used = 0;
1533 result = 0;
1534 break;
1535 }
1536 if (result != 0 && result != -EAGAIN)
1537 break;
1538 result = 0;
1539 set_current_state(TASK_INTERRUPTIBLE);
1540 snd_pcm_stream_lock_irq(substream);
1541 res = runtime->status->state;
1542 snd_pcm_stream_unlock_irq(substream);
1543 if (res != SNDRV_PCM_STATE_RUNNING) {
1544 set_current_state(TASK_RUNNING);
1545 break;
1546 }
1547 res = schedule_timeout(10 * HZ);
1548 if (signal_pending(current)) {
1549 result = -ERESTARTSYS;
1550 break;
1551 }
1552 if (res == 0) {
1553 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1554 result = -EIO;
1555 break;
1556 }
1557 }
1558 remove_wait_queue(&runtime->sleep, &wait);
1559 return result;
1560 }
1561
1562 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1563 {
1564 int err = 0;
1565 unsigned int saved_f_flags;
1566 struct snd_pcm_substream *substream;
1567 struct snd_pcm_runtime *runtime;
1568 snd_pcm_format_t format;
1569 unsigned long width;
1570 size_t size;
1571
1572 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1573 if (substream != NULL) {
1574 runtime = substream->runtime;
1575 if (atomic_read(&substream->mmap_count))
1576 goto __direct;
1577 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1578 return err;
1579 format = snd_pcm_oss_format_from(runtime->oss.format);
1580 width = snd_pcm_format_physical_width(format);
1581 mutex_lock(&runtime->oss.params_lock);
1582 if (runtime->oss.buffer_used > 0) {
1583 #ifdef OSS_DEBUG
1584 printk("sync: buffer_used\n");
1585 #endif
1586 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1587 snd_pcm_format_set_silence(format,
1588 runtime->oss.buffer + runtime->oss.buffer_used,
1589 size);
1590 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1591 if (err < 0) {
1592 mutex_unlock(&runtime->oss.params_lock);
1593 return err;
1594 }
1595 } else if (runtime->oss.period_ptr > 0) {
1596 #ifdef OSS_DEBUG
1597 printk("sync: period_ptr\n");
1598 #endif
1599 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1600 snd_pcm_format_set_silence(format,
1601 runtime->oss.buffer,
1602 size * 8 / width);
1603 err = snd_pcm_oss_sync1(substream, size);
1604 if (err < 0) {
1605 mutex_unlock(&runtime->oss.params_lock);
1606 return err;
1607 }
1608 }
1609 /*
1610 * The ALSA's period might be a bit large than OSS one.
1611 * Fill the remain portion of ALSA period with zeros.
1612 */
1613 size = runtime->control->appl_ptr % runtime->period_size;
1614 if (size > 0) {
1615 size = runtime->period_size - size;
1616 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1617 size = (runtime->frame_bits * size) / 8;
1618 while (size > 0) {
1619 mm_segment_t fs;
1620 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1621 size -= size1;
1622 size1 *= 8;
1623 size1 /= runtime->sample_bits;
1624 snd_pcm_format_set_silence(runtime->format,
1625 runtime->oss.buffer,
1626 size1);
1627 fs = snd_enter_user();
1628 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1629 snd_leave_user(fs);
1630 }
1631 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1632 void __user *buffers[runtime->channels];
1633 memset(buffers, 0, runtime->channels * sizeof(void *));
1634 snd_pcm_lib_writev(substream, buffers, size);
1635 }
1636 }
1637 mutex_unlock(&runtime->oss.params_lock);
1638 /*
1639 * finish sync: drain the buffer
1640 */
1641 __direct:
1642 saved_f_flags = substream->f_flags;
1643 substream->f_flags &= ~O_NONBLOCK;
1644 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1645 substream->f_flags = saved_f_flags;
1646 if (err < 0)
1647 return err;
1648 runtime->oss.prepare = 1;
1649 }
1650
1651 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1652 if (substream != NULL) {
1653 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1654 return err;
1655 runtime = substream->runtime;
1656 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1657 if (err < 0)
1658 return err;
1659 runtime->oss.buffer_used = 0;
1660 runtime->oss.prepare = 1;
1661 }
1662 return 0;
1663 }
1664
1665 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1666 {
1667 int idx;
1668
1669 for (idx = 1; idx >= 0; --idx) {
1670 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1671 struct snd_pcm_runtime *runtime;
1672 if (substream == NULL)
1673 continue;
1674 runtime = substream->runtime;
1675 if (rate < 1000)
1676 rate = 1000;
1677 else if (rate > 192000)
1678 rate = 192000;
1679 if (runtime->oss.rate != rate) {
1680 runtime->oss.params = 1;
1681 runtime->oss.rate = rate;
1682 }
1683 }
1684 return snd_pcm_oss_get_rate(pcm_oss_file);
1685 }
1686
1687 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1688 {
1689 struct snd_pcm_substream *substream;
1690 int err;
1691
1692 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1693 return err;
1694 return substream->runtime->oss.rate;
1695 }
1696
1697 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1698 {
1699 int idx;
1700 if (channels < 1)
1701 channels = 1;
1702 if (channels > 128)
1703 return -EINVAL;
1704 for (idx = 1; idx >= 0; --idx) {
1705 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1706 struct snd_pcm_runtime *runtime;
1707 if (substream == NULL)
1708 continue;
1709 runtime = substream->runtime;
1710 if (runtime->oss.channels != channels) {
1711 runtime->oss.params = 1;
1712 runtime->oss.channels = channels;
1713 }
1714 }
1715 return snd_pcm_oss_get_channels(pcm_oss_file);
1716 }
1717
1718 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1719 {
1720 struct snd_pcm_substream *substream;
1721 int err;
1722
1723 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1724 return err;
1725 return substream->runtime->oss.channels;
1726 }
1727
1728 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1729 {
1730 struct snd_pcm_substream *substream;
1731 int err;
1732
1733 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1734 return err;
1735 return substream->runtime->oss.period_bytes;
1736 }
1737
1738 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1739 {
1740 struct snd_pcm_substream *substream;
1741 int err;
1742 int direct;
1743 struct snd_pcm_hw_params *params;
1744 unsigned int formats = 0;
1745 struct snd_mask format_mask;
1746 int fmt;
1747
1748 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1749 return err;
1750 if (atomic_read(&substream->mmap_count))
1751 direct = 1;
1752 else
1753 direct = substream->oss.setup.direct;
1754 if (!direct)
1755 return AFMT_MU_LAW | AFMT_U8 |
1756 AFMT_S16_LE | AFMT_S16_BE |
1757 AFMT_S8 | AFMT_U16_LE |
1758 AFMT_U16_BE |
1759 AFMT_S32_LE | AFMT_S32_BE |
1760 AFMT_S24_LE | AFMT_S24_LE |
1761 AFMT_S24_PACKED;
1762 params = kmalloc(sizeof(*params), GFP_KERNEL);
1763 if (!params)
1764 return -ENOMEM;
1765 _snd_pcm_hw_params_any(params);
1766 err = snd_pcm_hw_refine(substream, params);
1767 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1768 kfree(params);
1769 snd_assert(err >= 0, return err);
1770 for (fmt = 0; fmt < 32; ++fmt) {
1771 if (snd_mask_test(&format_mask, fmt)) {
1772 int f = snd_pcm_oss_format_to(fmt);
1773 if (f >= 0)
1774 formats |= f;
1775 }
1776 }
1777 return formats;
1778 }
1779
1780 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1781 {
1782 int formats, idx;
1783
1784 if (format != AFMT_QUERY) {
1785 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1786 if (formats < 0)
1787 return formats;
1788 if (!(formats & format))
1789 format = AFMT_U8;
1790 for (idx = 1; idx >= 0; --idx) {
1791 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1792 struct snd_pcm_runtime *runtime;
1793 if (substream == NULL)
1794 continue;
1795 runtime = substream->runtime;
1796 if (runtime->oss.format != format) {
1797 runtime->oss.params = 1;
1798 runtime->oss.format = format;
1799 }
1800 }
1801 }
1802 return snd_pcm_oss_get_format(pcm_oss_file);
1803 }
1804
1805 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1806 {
1807 struct snd_pcm_substream *substream;
1808 int err;
1809
1810 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1811 return err;
1812 return substream->runtime->oss.format;
1813 }
1814
1815 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1816 {
1817 struct snd_pcm_runtime *runtime;
1818
1819 if (substream == NULL)
1820 return 0;
1821 runtime = substream->runtime;
1822 if (subdivide == 0) {
1823 subdivide = runtime->oss.subdivision;
1824 if (subdivide == 0)
1825 subdivide = 1;
1826 return subdivide;
1827 }
1828 if (runtime->oss.subdivision || runtime->oss.fragshift)
1829 return -EINVAL;
1830 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1831 subdivide != 8 && subdivide != 16)
1832 return -EINVAL;
1833 runtime->oss.subdivision = subdivide;
1834 runtime->oss.params = 1;
1835 return subdivide;
1836 }
1837
1838 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1839 {
1840 int err = -EINVAL, idx;
1841
1842 for (idx = 1; idx >= 0; --idx) {
1843 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1844 if (substream == NULL)
1845 continue;
1846 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1847 return err;
1848 }
1849 return err;
1850 }
1851
1852 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1853 {
1854 struct snd_pcm_runtime *runtime;
1855
1856 if (substream == NULL)
1857 return 0;
1858 runtime = substream->runtime;
1859 if (runtime->oss.subdivision || runtime->oss.fragshift)
1860 return -EINVAL;
1861 runtime->oss.fragshift = val & 0xffff;
1862 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1863 if (runtime->oss.fragshift < 4) /* < 16 */
1864 runtime->oss.fragshift = 4;
1865 if (runtime->oss.maxfrags < 2)
1866 runtime->oss.maxfrags = 2;
1867 runtime->oss.params = 1;
1868 return 0;
1869 }
1870
1871 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1872 {
1873 int err = -EINVAL, idx;
1874
1875 for (idx = 1; idx >= 0; --idx) {
1876 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1877 if (substream == NULL)
1878 continue;
1879 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1880 return err;
1881 }
1882 return err;
1883 }
1884
1885 static int snd_pcm_oss_nonblock(struct file * file)
1886 {
1887 file->f_flags |= O_NONBLOCK;
1888 return 0;
1889 }
1890
1891 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1892 {
1893
1894 if (substream == NULL) {
1895 res &= ~DSP_CAP_DUPLEX;
1896 return res;
1897 }
1898 #ifdef DSP_CAP_MULTI
1899 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1900 if (substream->pstr->substream_count > 1)
1901 res |= DSP_CAP_MULTI;
1902 #endif
1903 /* DSP_CAP_REALTIME is set all times: */
1904 /* all ALSA drivers can return actual pointer in ring buffer */
1905 #if defined(DSP_CAP_REALTIME) && 0
1906 {
1907 struct snd_pcm_runtime *runtime = substream->runtime;
1908 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1909 res &= ~DSP_CAP_REALTIME;
1910 }
1911 #endif
1912 return res;
1913 }
1914
1915 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1916 {
1917 int result, idx;
1918
1919 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1920 for (idx = 0; idx < 2; idx++) {
1921 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1922 result = snd_pcm_oss_get_caps1(substream, result);
1923 }
1924 result |= 0x0001; /* revision - same as SB AWE 64 */
1925 return result;
1926 }
1927
1928 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1929 {
1930 struct snd_pcm_runtime *runtime = substream->runtime;
1931 snd_pcm_uframes_t appl_ptr;
1932 appl_ptr = hw_ptr + runtime->buffer_size;
1933 appl_ptr %= runtime->boundary;
1934 runtime->control->appl_ptr = appl_ptr;
1935 }
1936
1937 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1938 {
1939 struct snd_pcm_runtime *runtime;
1940 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1941 int err, cmd;
1942
1943 #ifdef OSS_DEBUG
1944 printk("pcm_oss: trigger = 0x%x\n", trigger);
1945 #endif
1946
1947 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1948 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1949
1950 if (psubstream) {
1951 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1952 return err;
1953 }
1954 if (csubstream) {
1955 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1956 return err;
1957 }
1958 if (psubstream) {
1959 runtime = psubstream->runtime;
1960 if (trigger & PCM_ENABLE_OUTPUT) {
1961 if (runtime->oss.trigger)
1962 goto _skip1;
1963 if (atomic_read(&psubstream->mmap_count))
1964 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1965 runtime->oss.trigger = 1;
1966 runtime->start_threshold = 1;
1967 cmd = SNDRV_PCM_IOCTL_START;
1968 } else {
1969 if (!runtime->oss.trigger)
1970 goto _skip1;
1971 runtime->oss.trigger = 0;
1972 runtime->start_threshold = runtime->boundary;
1973 cmd = SNDRV_PCM_IOCTL_DROP;
1974 runtime->oss.prepare = 1;
1975 }
1976 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1977 if (err < 0)
1978 return err;
1979 }
1980 _skip1:
1981 if (csubstream) {
1982 runtime = csubstream->runtime;
1983 if (trigger & PCM_ENABLE_INPUT) {
1984 if (runtime->oss.trigger)
1985 goto _skip2;
1986 runtime->oss.trigger = 1;
1987 runtime->start_threshold = 1;
1988 cmd = SNDRV_PCM_IOCTL_START;
1989 } else {
1990 if (!runtime->oss.trigger)
1991 goto _skip2;
1992 runtime->oss.trigger = 0;
1993 runtime->start_threshold = runtime->boundary;
1994 cmd = SNDRV_PCM_IOCTL_DROP;
1995 runtime->oss.prepare = 1;
1996 }
1997 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1998 if (err < 0)
1999 return err;
2000 }
2001 _skip2:
2002 return 0;
2003 }
2004
2005 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2006 {
2007 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2008 int result = 0;
2009
2010 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2011 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2012 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2013 result |= PCM_ENABLE_OUTPUT;
2014 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2015 result |= PCM_ENABLE_INPUT;
2016 return result;
2017 }
2018
2019 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2020 {
2021 struct snd_pcm_substream *substream;
2022 struct snd_pcm_runtime *runtime;
2023 snd_pcm_sframes_t delay;
2024 int err;
2025
2026 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2027 if (substream == NULL)
2028 return -EINVAL;
2029 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2030 return err;
2031 runtime = substream->runtime;
2032 if (runtime->oss.params || runtime->oss.prepare)
2033 return 0;
2034 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2035 if (err == -EPIPE)
2036 delay = 0; /* hack for broken OSS applications */
2037 else if (err < 0)
2038 return err;
2039 return snd_pcm_oss_bytes(substream, delay);
2040 }
2041
2042 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2043 {
2044 struct snd_pcm_substream *substream;
2045 struct snd_pcm_runtime *runtime;
2046 snd_pcm_sframes_t delay;
2047 int fixup;
2048 struct count_info info;
2049 int err;
2050
2051 if (_info == NULL)
2052 return -EFAULT;
2053 substream = pcm_oss_file->streams[stream];
2054 if (substream == NULL)
2055 return -EINVAL;
2056 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2057 return err;
2058 runtime = substream->runtime;
2059 if (runtime->oss.params || runtime->oss.prepare) {
2060 memset(&info, 0, sizeof(info));
2061 if (copy_to_user(_info, &info, sizeof(info)))
2062 return -EFAULT;
2063 return 0;
2064 }
2065 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2066 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2067 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2068 err = 0;
2069 delay = 0;
2070 fixup = 0;
2071 } else {
2072 fixup = runtime->oss.buffer_used;
2073 }
2074 } else {
2075 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2076 fixup = -runtime->oss.buffer_used;
2077 }
2078 if (err < 0)
2079 return err;
2080 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2081 if (atomic_read(&substream->mmap_count)) {
2082 snd_pcm_sframes_t n;
2083 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2084 if (n < 0)
2085 n += runtime->boundary;
2086 info.blocks = n / runtime->period_size;
2087 runtime->oss.prev_hw_ptr_interrupt = delay;
2088 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2089 snd_pcm_oss_simulate_fill(substream, delay);
2090 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2091 } else {
2092 delay = snd_pcm_oss_bytes(substream, delay);
2093 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2094 if (substream->oss.setup.buggyptr)
2095 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2096 else
2097 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2098 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2099 } else {
2100 delay += fixup;
2101 info.blocks = delay / runtime->oss.period_bytes;
2102 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2103 }
2104 }
2105 if (copy_to_user(_info, &info, sizeof(info)))
2106 return -EFAULT;
2107 return 0;
2108 }
2109
2110 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2111 {
2112 struct snd_pcm_substream *substream;
2113 struct snd_pcm_runtime *runtime;
2114 snd_pcm_sframes_t avail;
2115 int fixup;
2116 struct audio_buf_info info;
2117 int err;
2118
2119 if (_info == NULL)
2120 return -EFAULT;
2121 substream = pcm_oss_file->streams[stream];
2122 if (substream == NULL)
2123 return -EINVAL;
2124 runtime = substream->runtime;
2125
2126 if (runtime->oss.params &&
2127 (err = snd_pcm_oss_change_params(substream)) < 0)
2128 return err;
2129
2130 info.fragsize = runtime->oss.period_bytes;
2131 info.fragstotal = runtime->periods;
2132 if (runtime->oss.prepare) {
2133 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2134 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2135 info.fragments = runtime->oss.periods;
2136 } else {
2137 info.bytes = 0;
2138 info.fragments = 0;
2139 }
2140 } else {
2141 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2142 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2143 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2144 avail = runtime->buffer_size;
2145 err = 0;
2146 fixup = 0;
2147 } else {
2148 avail = runtime->buffer_size - avail;
2149 fixup = -runtime->oss.buffer_used;
2150 }
2151 } else {
2152 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2153 fixup = runtime->oss.buffer_used;
2154 }
2155 if (err < 0)
2156 return err;
2157 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2158 info.fragments = info.bytes / runtime->oss.period_bytes;
2159 }
2160
2161 #ifdef OSS_DEBUG
2162 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
2163 #endif
2164 if (copy_to_user(_info, &info, sizeof(info)))
2165 return -EFAULT;
2166 return 0;
2167 }
2168
2169 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2170 {
2171 // it won't be probably implemented
2172 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2173 return -EINVAL;
2174 }
2175
2176 static const char *strip_task_path(const char *path)
2177 {
2178 const char *ptr, *ptrl = NULL;
2179 for (ptr = path; *ptr; ptr++) {
2180 if (*ptr == '/')
2181 ptrl = ptr + 1;
2182 }
2183 return ptrl;
2184 }
2185
2186 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2187 const char *task_name,
2188 struct snd_pcm_oss_setup *rsetup)
2189 {
2190 struct snd_pcm_oss_setup *setup;
2191
2192 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2193 do {
2194 for (setup = pcm->streams[stream].oss.setup_list; setup;
2195 setup = setup->next) {
2196 if (!strcmp(setup->task_name, task_name))
2197 goto out;
2198 }
2199 } while ((task_name = strip_task_path(task_name)) != NULL);
2200 out:
2201 if (setup)
2202 *rsetup = *setup;
2203 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2204 }
2205
2206 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2207 {
2208 struct snd_pcm_runtime *runtime;
2209 runtime = substream->runtime;
2210 vfree(runtime->oss.buffer);
2211 runtime->oss.buffer = NULL;
2212 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2213 snd_pcm_oss_plugin_clear(substream);
2214 #endif
2215 substream->oss.oss = 0;
2216 }
2217
2218 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2219 struct snd_pcm_oss_setup *setup,
2220 int minor)
2221 {
2222 struct snd_pcm_runtime *runtime;
2223
2224 substream->oss.oss = 1;
2225 substream->oss.setup = *setup;
2226 if (setup->nonblock)
2227 substream->f_flags |= O_NONBLOCK;
2228 else if (setup->block)
2229 substream->f_flags &= ~O_NONBLOCK;
2230 runtime = substream->runtime;
2231 runtime->oss.params = 1;
2232 runtime->oss.trigger = 1;
2233 runtime->oss.rate = 8000;
2234 mutex_init(&runtime->oss.params_lock);
2235 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2236 case SNDRV_MINOR_OSS_PCM_8:
2237 runtime->oss.format = AFMT_U8;
2238 break;
2239 case SNDRV_MINOR_OSS_PCM_16:
2240 runtime->oss.format = AFMT_S16_LE;
2241 break;
2242 default:
2243 runtime->oss.format = AFMT_MU_LAW;
2244 }
2245 runtime->oss.channels = 1;
2246 runtime->oss.fragshift = 0;
2247 runtime->oss.maxfrags = 0;
2248 runtime->oss.subdivision = 0;
2249 substream->pcm_release = snd_pcm_oss_release_substream;
2250 }
2251
2252 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2253 {
2254 int cidx;
2255 snd_assert(pcm_oss_file != NULL, return -ENXIO);
2256 for (cidx = 0; cidx < 2; ++cidx) {
2257 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2258 if (substream)
2259 snd_pcm_release_substream(substream);
2260 }
2261 kfree(pcm_oss_file);
2262 return 0;
2263 }
2264
2265 static int snd_pcm_oss_open_file(struct file *file,
2266 struct snd_pcm *pcm,
2267 struct snd_pcm_oss_file **rpcm_oss_file,
2268 int minor,
2269 struct snd_pcm_oss_setup *setup)
2270 {
2271 int idx, err;
2272 struct snd_pcm_oss_file *pcm_oss_file;
2273 struct snd_pcm_substream *substream;
2274 unsigned int f_mode = file->f_mode;
2275
2276 snd_assert(rpcm_oss_file != NULL, return -EINVAL);
2277 *rpcm_oss_file = NULL;
2278
2279 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2280 if (pcm_oss_file == NULL)
2281 return -ENOMEM;
2282
2283 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2284 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2285 f_mode = FMODE_WRITE;
2286
2287 file->f_flags &= ~O_APPEND;
2288 for (idx = 0; idx < 2; idx++) {
2289 if (setup[idx].disable)
2290 continue;
2291 if (! pcm->streams[idx].substream_count)
2292 continue; /* no matching substream */
2293 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2294 if (! (f_mode & FMODE_WRITE))
2295 continue;
2296 } else {
2297 if (! (f_mode & FMODE_READ))
2298 continue;
2299 }
2300 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2301 if (err < 0) {
2302 snd_pcm_oss_release_file(pcm_oss_file);
2303 return err;
2304 }
2305
2306 pcm_oss_file->streams[idx] = substream;
2307 substream->file = pcm_oss_file;
2308 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2309 }
2310
2311 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2312 snd_pcm_oss_release_file(pcm_oss_file);
2313 return -EINVAL;
2314 }
2315
2316 file->private_data = pcm_oss_file;
2317 *rpcm_oss_file = pcm_oss_file;
2318 return 0;
2319 }
2320
2321
2322 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2323 {
2324 unsigned int idx;
2325
2326 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
2327 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2328 name[idx] = task->comm[idx];
2329 name[idx] = '\0';
2330 return 0;
2331 }
2332
2333 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2334 {
2335 int err;
2336 char task_name[32];
2337 struct snd_pcm *pcm;
2338 struct snd_pcm_oss_file *pcm_oss_file;
2339 struct snd_pcm_oss_setup setup[2];
2340 int nonblock;
2341 wait_queue_t wait;
2342
2343 pcm = snd_lookup_oss_minor_data(iminor(inode),
2344 SNDRV_OSS_DEVICE_TYPE_PCM);
2345 if (pcm == NULL) {
2346 err = -ENODEV;
2347 goto __error1;
2348 }
2349 err = snd_card_file_add(pcm->card, file);
2350 if (err < 0)
2351 goto __error1;
2352 if (!try_module_get(pcm->card->module)) {
2353 err = -EFAULT;
2354 goto __error2;
2355 }
2356 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2357 err = -EFAULT;
2358 goto __error;
2359 }
2360 memset(setup, 0, sizeof(setup));
2361 if (file->f_mode & FMODE_WRITE)
2362 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2363 task_name, &setup[0]);
2364 if (file->f_mode & FMODE_READ)
2365 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2366 task_name, &setup[1]);
2367
2368 nonblock = !!(file->f_flags & O_NONBLOCK);
2369 if (!nonblock)
2370 nonblock = nonblock_open;
2371
2372 init_waitqueue_entry(&wait, current);
2373 add_wait_queue(&pcm->open_wait, &wait);
2374 mutex_lock(&pcm->open_mutex);
2375 while (1) {
2376 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2377 iminor(inode), setup);
2378 if (err >= 0)
2379 break;
2380 if (err == -EAGAIN) {
2381 if (nonblock) {
2382 err = -EBUSY;
2383 break;
2384 }
2385 } else
2386 break;
2387 set_current_state(TASK_INTERRUPTIBLE);
2388 mutex_unlock(&pcm->open_mutex);
2389 schedule();
2390 mutex_lock(&pcm->open_mutex);
2391 if (signal_pending(current)) {
2392 err = -ERESTARTSYS;
2393 break;
2394 }
2395 }
2396 remove_wait_queue(&pcm->open_wait, &wait);
2397 mutex_unlock(&pcm->open_mutex);
2398 if (err < 0)
2399 goto __error;
2400 return err;
2401
2402 __error:
2403 module_put(pcm->card->module);
2404 __error2:
2405 snd_card_file_remove(pcm->card, file);
2406 __error1:
2407 return err;
2408 }
2409
2410 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2411 {
2412 struct snd_pcm *pcm;
2413 struct snd_pcm_substream *substream;
2414 struct snd_pcm_oss_file *pcm_oss_file;
2415
2416 pcm_oss_file = file->private_data;
2417 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2418 if (substream == NULL)
2419 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2420 snd_assert(substream != NULL, return -ENXIO);
2421 pcm = substream->pcm;
2422 if (!pcm->card->shutdown)
2423 snd_pcm_oss_sync(pcm_oss_file);
2424 mutex_lock(&pcm->open_mutex);
2425 snd_pcm_oss_release_file(pcm_oss_file);
2426 mutex_unlock(&pcm->open_mutex);
2427 wake_up(&pcm->open_wait);
2428 module_put(pcm->card->module);
2429 snd_card_file_remove(pcm->card, file);
2430 return 0;
2431 }
2432
2433 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2434 {
2435 struct snd_pcm_oss_file *pcm_oss_file;
2436 int __user *p = (int __user *)arg;
2437 int res;
2438
2439 pcm_oss_file = file->private_data;
2440 if (cmd == OSS_GETVERSION)
2441 return put_user(SNDRV_OSS_VERSION, p);
2442 if (cmd == OSS_ALSAEMULVER)
2443 return put_user(1, p);
2444 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2445 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2446 struct snd_pcm_substream *substream;
2447 int idx;
2448 for (idx = 0; idx < 2; ++idx) {
2449 substream = pcm_oss_file->streams[idx];
2450 if (substream != NULL)
2451 break;
2452 }
2453 snd_assert(substream != NULL, return -ENXIO);
2454 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2455 }
2456 #endif
2457 if (((cmd >> 8) & 0xff) != 'P')
2458 return -EINVAL;
2459 #ifdef OSS_DEBUG
2460 printk("pcm_oss: ioctl = 0x%x\n", cmd);
2461 #endif
2462 switch (cmd) {
2463 case SNDCTL_DSP_RESET:
2464 return snd_pcm_oss_reset(pcm_oss_file);
2465 case SNDCTL_DSP_SYNC:
2466 return snd_pcm_oss_sync(pcm_oss_file);
2467 case SNDCTL_DSP_SPEED:
2468 if (get_user(res, p))
2469 return -EFAULT;
2470 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2471 return res;
2472 return put_user(res, p);
2473 case SOUND_PCM_READ_RATE:
2474 res = snd_pcm_oss_get_rate(pcm_oss_file);
2475 if (res < 0)
2476 return res;
2477 return put_user(res, p);
2478 case SNDCTL_DSP_STEREO:
2479 if (get_user(res, p))
2480 return -EFAULT;
2481 res = res > 0 ? 2 : 1;
2482 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2483 return res;
2484 return put_user(--res, p);
2485 case SNDCTL_DSP_GETBLKSIZE:
2486 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2487 if (res < 0)
2488 return res;
2489 return put_user(res, p);
2490 case SNDCTL_DSP_SETFMT:
2491 if (get_user(res, p))
2492 return -EFAULT;
2493 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2494 if (res < 0)
2495 return res;
2496 return put_user(res, p);
2497 case SOUND_PCM_READ_BITS:
2498 res = snd_pcm_oss_get_format(pcm_oss_file);
2499 if (res < 0)
2500 return res;
2501 return put_user(res, p);
2502 case SNDCTL_DSP_CHANNELS:
2503 if (get_user(res, p))
2504 return -EFAULT;
2505 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2506 if (res < 0)
2507 return res;
2508 return put_user(res, p);
2509 case SOUND_PCM_READ_CHANNELS:
2510 res = snd_pcm_oss_get_channels(pcm_oss_file);
2511 if (res < 0)
2512 return res;
2513 return put_user(res, p);
2514 case SOUND_PCM_WRITE_FILTER:
2515 case SOUND_PCM_READ_FILTER:
2516 return -EIO;
2517 case SNDCTL_DSP_POST:
2518 return snd_pcm_oss_post(pcm_oss_file);
2519 case SNDCTL_DSP_SUBDIVIDE:
2520 if (get_user(res, p))
2521 return -EFAULT;
2522 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2523 if (res < 0)
2524 return res;
2525 return put_user(res, p);
2526 case SNDCTL_DSP_SETFRAGMENT:
2527 if (get_user(res, p))
2528 return -EFAULT;
2529 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2530 case SNDCTL_DSP_GETFMTS:
2531 res = snd_pcm_oss_get_formats(pcm_oss_file);
2532 if (res < 0)
2533 return res;
2534 return put_user(res, p);
2535 case SNDCTL_DSP_GETOSPACE:
2536 case SNDCTL_DSP_GETISPACE:
2537 return snd_pcm_oss_get_space(pcm_oss_file,
2538 cmd == SNDCTL_DSP_GETISPACE ?
2539 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2540 (struct audio_buf_info __user *) arg);
2541 case SNDCTL_DSP_NONBLOCK:
2542 return snd_pcm_oss_nonblock(file);
2543 case SNDCTL_DSP_GETCAPS:
2544 res = snd_pcm_oss_get_caps(pcm_oss_file);
2545 if (res < 0)
2546 return res;
2547 return put_user(res, p);
2548 case SNDCTL_DSP_GETTRIGGER:
2549 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2550 if (res < 0)
2551 return res;
2552 return put_user(res, p);
2553 case SNDCTL_DSP_SETTRIGGER:
2554 if (get_user(res, p))
2555 return -EFAULT;
2556 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2557 case SNDCTL_DSP_GETIPTR:
2558 case SNDCTL_DSP_GETOPTR:
2559 return snd_pcm_oss_get_ptr(pcm_oss_file,
2560 cmd == SNDCTL_DSP_GETIPTR ?
2561 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2562 (struct count_info __user *) arg);
2563 case SNDCTL_DSP_MAPINBUF:
2564 case SNDCTL_DSP_MAPOUTBUF:
2565 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2566 cmd == SNDCTL_DSP_MAPINBUF ?
2567 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2568 (struct buffmem_desc __user *) arg);
2569 case SNDCTL_DSP_SETSYNCRO:
2570 /* stop DMA now.. */
2571 return 0;
2572 case SNDCTL_DSP_SETDUPLEX:
2573 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2574 return 0;
2575 return -EIO;
2576 case SNDCTL_DSP_GETODELAY:
2577 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2578 if (res < 0) {
2579 /* it's for sure, some broken apps don't check for error codes */
2580 put_user(0, p);
2581 return res;
2582 }
2583 return put_user(res, p);
2584 case SNDCTL_DSP_PROFILE:
2585 return 0; /* silently ignore */
2586 default:
2587 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2588 }
2589 return -EINVAL;
2590 }
2591
2592 #ifdef CONFIG_COMPAT
2593 /* all compatible */
2594 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2595 #else
2596 #define snd_pcm_oss_ioctl_compat NULL
2597 #endif
2598
2599 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2600 {
2601 struct snd_pcm_oss_file *pcm_oss_file;
2602 struct snd_pcm_substream *substream;
2603
2604 pcm_oss_file = file->private_data;
2605 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2606 if (substream == NULL)
2607 return -ENXIO;
2608 substream->f_flags = file->f_flags & O_NONBLOCK;
2609 #ifndef OSS_DEBUG
2610 return snd_pcm_oss_read1(substream, buf, count);
2611 #else
2612 {
2613 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2614 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2615 return res;
2616 }
2617 #endif
2618 }
2619
2620 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2621 {
2622 struct snd_pcm_oss_file *pcm_oss_file;
2623 struct snd_pcm_substream *substream;
2624 long result;
2625
2626 pcm_oss_file = file->private_data;
2627 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2628 if (substream == NULL)
2629 return -ENXIO;
2630 substream->f_flags = file->f_flags & O_NONBLOCK;
2631 result = snd_pcm_oss_write1(substream, buf, count);
2632 #ifdef OSS_DEBUG
2633 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2634 #endif
2635 return result;
2636 }
2637
2638 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2639 {
2640 struct snd_pcm_runtime *runtime = substream->runtime;
2641 if (atomic_read(&substream->mmap_count))
2642 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2643 else
2644 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2645 }
2646
2647 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2648 {
2649 struct snd_pcm_runtime *runtime = substream->runtime;
2650 if (atomic_read(&substream->mmap_count))
2651 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2652 else
2653 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2654 }
2655
2656 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2657 {
2658 struct snd_pcm_oss_file *pcm_oss_file;
2659 unsigned int mask;
2660 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2661
2662 pcm_oss_file = file->private_data;
2663
2664 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2665 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2666
2667 mask = 0;
2668 if (psubstream != NULL) {
2669 struct snd_pcm_runtime *runtime = psubstream->runtime;
2670 poll_wait(file, &runtime->sleep, wait);
2671 snd_pcm_stream_lock_irq(psubstream);
2672 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2673 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2674 snd_pcm_oss_playback_ready(psubstream)))
2675 mask |= POLLOUT | POLLWRNORM;
2676 snd_pcm_stream_unlock_irq(psubstream);
2677 }
2678 if (csubstream != NULL) {
2679 struct snd_pcm_runtime *runtime = csubstream->runtime;
2680 snd_pcm_state_t ostate;
2681 poll_wait(file, &runtime->sleep, wait);
2682 snd_pcm_stream_lock_irq(csubstream);
2683 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2684 snd_pcm_oss_capture_ready(csubstream))
2685 mask |= POLLIN | POLLRDNORM;
2686 snd_pcm_stream_unlock_irq(csubstream);
2687 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2688 struct snd_pcm_oss_file ofile;
2689 memset(&ofile, 0, sizeof(ofile));
2690 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2691 runtime->oss.trigger = 0;
2692 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2693 }
2694 }
2695
2696 return mask;
2697 }
2698
2699 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2700 {
2701 struct snd_pcm_oss_file *pcm_oss_file;
2702 struct snd_pcm_substream *substream = NULL;
2703 struct snd_pcm_runtime *runtime;
2704 int err;
2705
2706 #ifdef OSS_DEBUG
2707 printk("pcm_oss: mmap begin\n");
2708 #endif
2709 pcm_oss_file = file->private_data;
2710 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2711 case VM_READ | VM_WRITE:
2712 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2713 if (substream)
2714 break;
2715 /* Fall through */
2716 case VM_READ:
2717 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2718 break;
2719 case VM_WRITE:
2720 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2721 break;
2722 default:
2723 return -EINVAL;
2724 }
2725 /* set VM_READ access as well to fix memset() routines that do
2726 reads before writes (to improve performance) */
2727 area->vm_flags |= VM_READ;
2728 if (substream == NULL)
2729 return -ENXIO;
2730 runtime = substream->runtime;
2731 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2732 return -EIO;
2733 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2734 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2735 else
2736 return -EIO;
2737
2738 if (runtime->oss.params) {
2739 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2740 return err;
2741 }
2742 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2743 if (runtime->oss.plugin_first != NULL)
2744 return -EIO;
2745 #endif
2746
2747 if (area->vm_pgoff != 0)
2748 return -EINVAL;
2749
2750 err = snd_pcm_mmap_data(substream, file, area);
2751 if (err < 0)
2752 return err;
2753 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2754 runtime->silence_threshold = 0;
2755 runtime->silence_size = 0;
2756 #ifdef OSS_DEBUG
2757 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2758 #endif
2759 /* In mmap mode we never stop */
2760 runtime->stop_threshold = runtime->boundary;
2761
2762 return 0;
2763 }
2764
2765 #ifdef CONFIG_SND_VERBOSE_PROCFS
2766 /*
2767 * /proc interface
2768 */
2769
2770 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2771 struct snd_info_buffer *buffer)
2772 {
2773 struct snd_pcm_str *pstr = entry->private_data;
2774 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2775 mutex_lock(&pstr->oss.setup_mutex);
2776 while (setup) {
2777 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2778 setup->task_name,
2779 setup->periods,
2780 setup->period_size,
2781 setup->disable ? " disable" : "",
2782 setup->direct ? " direct" : "",
2783 setup->block ? " block" : "",
2784 setup->nonblock ? " non-block" : "",
2785 setup->partialfrag ? " partial-frag" : "",
2786 setup->nosilence ? " no-silence" : "");
2787 setup = setup->next;
2788 }
2789 mutex_unlock(&pstr->oss.setup_mutex);
2790 }
2791
2792 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2793 {
2794 struct snd_pcm_oss_setup *setup, *setupn;
2795
2796 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2797 setup; setup = setupn) {
2798 setupn = setup->next;
2799 kfree(setup->task_name);
2800 kfree(setup);
2801 }
2802 pstr->oss.setup_list = NULL;
2803 }
2804
2805 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2806 struct snd_info_buffer *buffer)
2807 {
2808 struct snd_pcm_str *pstr = entry->private_data;
2809 char line[128], str[32], task_name[32], *ptr;
2810 int idx1;
2811 struct snd_pcm_oss_setup *setup, *setup1, template;
2812
2813 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2814 mutex_lock(&pstr->oss.setup_mutex);
2815 memset(&template, 0, sizeof(template));
2816 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2817 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2818 snd_pcm_oss_proc_free_setup_list(pstr);
2819 mutex_unlock(&pstr->oss.setup_mutex);
2820 continue;
2821 }
2822 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2823 if (!strcmp(setup->task_name, task_name)) {
2824 template = *setup;
2825 break;
2826 }
2827 }
2828 ptr = snd_info_get_str(str, ptr, sizeof(str));
2829 template.periods = simple_strtoul(str, NULL, 10);
2830 ptr = snd_info_get_str(str, ptr, sizeof(str));
2831 template.period_size = simple_strtoul(str, NULL, 10);
2832 for (idx1 = 31; idx1 >= 0; idx1--)
2833 if (template.period_size & (1 << idx1))
2834 break;
2835 for (idx1--; idx1 >= 0; idx1--)
2836 template.period_size &= ~(1 << idx1);
2837 do {
2838 ptr = snd_info_get_str(str, ptr, sizeof(str));
2839 if (!strcmp(str, "disable")) {
2840 template.disable = 1;
2841 } else if (!strcmp(str, "direct")) {
2842 template.direct = 1;
2843 } else if (!strcmp(str, "block")) {
2844 template.block = 1;
2845 } else if (!strcmp(str, "non-block")) {
2846 template.nonblock = 1;
2847 } else if (!strcmp(str, "partial-frag")) {
2848 template.partialfrag = 1;
2849 } else if (!strcmp(str, "no-silence")) {
2850 template.nosilence = 1;
2851 } else if (!strcmp(str, "buggy-ptr")) {
2852 template.buggyptr = 1;
2853 }
2854 } while (*str);
2855 if (setup == NULL) {
2856 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2857 if (! setup) {
2858 buffer->error = -ENOMEM;
2859 mutex_lock(&pstr->oss.setup_mutex);
2860 return;
2861 }
2862 if (pstr->oss.setup_list == NULL)
2863 pstr->oss.setup_list = setup;
2864 else {
2865 for (setup1 = pstr->oss.setup_list;
2866 setup1->next; setup1 = setup1->next);
2867 setup1->next = setup;
2868 }
2869 template.task_name = kstrdup(task_name, GFP_KERNEL);
2870 if (! template.task_name) {
2871 kfree(setup);
2872 buffer->error = -ENOMEM;
2873 mutex_lock(&pstr->oss.setup_mutex);
2874 return;
2875 }
2876 }
2877 *setup = template;
2878 mutex_unlock(&pstr->oss.setup_mutex);
2879 }
2880 }
2881
2882 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2883 {
2884 int stream;
2885 for (stream = 0; stream < 2; ++stream) {
2886 struct snd_info_entry *entry;
2887 struct snd_pcm_str *pstr = &pcm->streams[stream];
2888 if (pstr->substream_count == 0)
2889 continue;
2890 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2891 entry->content = SNDRV_INFO_CONTENT_TEXT;
2892 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2893 entry->c.text.read = snd_pcm_oss_proc_read;
2894 entry->c.text.write = snd_pcm_oss_proc_write;
2895 entry->private_data = pstr;
2896 if (snd_info_register(entry) < 0) {
2897 snd_info_free_entry(entry);
2898 entry = NULL;
2899 }
2900 }
2901 pstr->oss.proc_entry = entry;
2902 }
2903 }
2904
2905 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2906 {
2907 int stream;
2908 for (stream = 0; stream < 2; ++stream) {
2909 struct snd_pcm_str *pstr = &pcm->streams[stream];
2910 snd_info_free_entry(pstr->oss.proc_entry);
2911 pstr->oss.proc_entry = NULL;
2912 snd_pcm_oss_proc_free_setup_list(pstr);
2913 }
2914 }
2915 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2916 #define snd_pcm_oss_proc_init(pcm)
2917 #define snd_pcm_oss_proc_done(pcm)
2918 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2919
2920 /*
2921 * ENTRY functions
2922 */
2923
2924 static const struct file_operations snd_pcm_oss_f_reg =
2925 {
2926 .owner = THIS_MODULE,
2927 .read = snd_pcm_oss_read,
2928 .write = snd_pcm_oss_write,
2929 .open = snd_pcm_oss_open,
2930 .release = snd_pcm_oss_release,
2931 .poll = snd_pcm_oss_poll,
2932 .unlocked_ioctl = snd_pcm_oss_ioctl,
2933 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2934 .mmap = snd_pcm_oss_mmap,
2935 };
2936
2937 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2938 {
2939 char name[128];
2940 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2941 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2942 pcm->card, index, &snd_pcm_oss_f_reg,
2943 pcm, name) < 0) {
2944 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2945 pcm->card->number, pcm->device);
2946 }
2947 }
2948
2949 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2950 {
2951 pcm->oss.reg = 0;
2952 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2953 char name[128];
2954 int duplex;
2955 register_oss_dsp(pcm, 0);
2956 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2957 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2958 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2959 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2960 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2961 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2962 pcm->card->number,
2963 name);
2964 #endif
2965 pcm->oss.reg++;
2966 pcm->oss.reg_mask |= 1;
2967 }
2968 if (adsp_map[pcm->card->number] == (int)pcm->device) {
2969 register_oss_dsp(pcm, 1);
2970 pcm->oss.reg++;
2971 pcm->oss.reg_mask |= 2;
2972 }
2973
2974 if (pcm->oss.reg)
2975 snd_pcm_oss_proc_init(pcm);
2976
2977 return 0;
2978 }
2979
2980 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2981 {
2982 if (pcm->oss.reg) {
2983 if (pcm->oss.reg_mask & 1) {
2984 pcm->oss.reg_mask &= ~1;
2985 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2986 pcm->card, 0);
2987 }
2988 if (pcm->oss.reg_mask & 2) {
2989 pcm->oss.reg_mask &= ~2;
2990 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2991 pcm->card, 1);
2992 }
2993 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2994 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2995 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2996 #endif
2997 }
2998 pcm->oss.reg = 0;
2999 }
3000 return 0;
3001 }
3002
3003 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3004 {
3005 snd_pcm_oss_disconnect_minor(pcm);
3006 snd_pcm_oss_proc_done(pcm);
3007 return 0;
3008 }
3009
3010 static struct snd_pcm_notify snd_pcm_oss_notify =
3011 {
3012 .n_register = snd_pcm_oss_register_minor,
3013 .n_disconnect = snd_pcm_oss_disconnect_minor,
3014 .n_unregister = snd_pcm_oss_unregister_minor,
3015 };
3016
3017 static int __init alsa_pcm_oss_init(void)
3018 {
3019 int i;
3020 int err;
3021
3022 /* check device map table */
3023 for (i = 0; i < SNDRV_CARDS; i++) {
3024 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3025 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3026 i, dsp_map[i]);
3027 dsp_map[i] = 0;
3028 }
3029 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3030 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3031 i, adsp_map[i]);
3032 adsp_map[i] = 1;
3033 }
3034 }
3035 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3036 return err;
3037 return 0;
3038 }
3039
3040 static void __exit alsa_pcm_oss_exit(void)
3041 {
3042 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3043 }
3044
3045 module_init(alsa_pcm_oss_init)
3046 module_exit(alsa_pcm_oss_exit)
Linux 2.6 libata-dev (mirror)