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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / sound / core / oss / pcm_oss.c
blob5adc3d49d5c12f9e28b7815a2c5f2e8d94f3f585
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
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/time.h>
26 #include <linux/vmalloc.h>
27 #include <linux/moduleparam.h>
28 #include <linux/math64.h>
29 #include <linux/string.h>
30 #include <sound/core.h>
31 #include <sound/minors.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include "pcm_plugin.h"
35 #include <sound/info.h>
36 #include <linux/soundcard.h>
37 #include <sound/initval.h>
38
39 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
40
41 static int dsp_map[SNDRV_CARDS];
42 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
43 static int nonblock_open = 1;
44
45 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
46 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
47 MODULE_LICENSE("GPL");
48 module_param_array(dsp_map, int, NULL, 0444);
49 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
50 module_param_array(adsp_map, int, NULL, 0444);
51 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
52 module_param(nonblock_open, bool, 0644);
53 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
54 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
55 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
56
57 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
58 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
59 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
60 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
61
62 static inline mm_segment_t snd_enter_user(void)
63 {
64 mm_segment_t fs = get_fs();
65 set_fs(get_ds());
66 return fs;
67 }
68
69 static inline void snd_leave_user(mm_segment_t fs)
70 {
71 set_fs(fs);
72 }
73
74 /*
75 * helper functions to process hw_params
76 */
77 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
78 {
79 int changed = 0;
80 if (i->min < min) {
81 i->min = min;
82 i->openmin = openmin;
83 changed = 1;
84 } else if (i->min == min && !i->openmin && openmin) {
85 i->openmin = 1;
86 changed = 1;
87 }
88 if (i->integer) {
89 if (i->openmin) {
90 i->min++;
91 i->openmin = 0;
92 }
93 }
94 if (snd_interval_checkempty(i)) {
95 snd_interval_none(i);
96 return -EINVAL;
97 }
98 return changed;
99 }
100
101 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
102 {
103 int changed = 0;
104 if (i->max > max) {
105 i->max = max;
106 i->openmax = openmax;
107 changed = 1;
108 } else if (i->max == max && !i->openmax && openmax) {
109 i->openmax = 1;
110 changed = 1;
111 }
112 if (i->integer) {
113 if (i->openmax) {
114 i->max--;
115 i->openmax = 0;
116 }
117 }
118 if (snd_interval_checkempty(i)) {
119 snd_interval_none(i);
120 return -EINVAL;
121 }
122 return changed;
123 }
124
125 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
126 {
127 struct snd_interval t;
128 t.empty = 0;
129 t.min = t.max = val;
130 t.openmin = t.openmax = 0;
131 t.integer = 1;
132 return snd_interval_refine(i, &t);
133 }
134
135 /**
136 * snd_pcm_hw_param_value_min
137 * @params: the hw_params instance
138 * @var: parameter to retrieve
139 * @dir: pointer to the direction (-1,0,1) or NULL
140 *
141 * Return the minimum value for field PAR.
142 */
143 static unsigned int
144 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
145 snd_pcm_hw_param_t var, int *dir)
146 {
147 if (hw_is_mask(var)) {
148 if (dir)
149 *dir = 0;
150 return snd_mask_min(hw_param_mask_c(params, var));
151 }
152 if (hw_is_interval(var)) {
153 const struct snd_interval *i = hw_param_interval_c(params, var);
154 if (dir)
155 *dir = i->openmin;
156 return snd_interval_min(i);
157 }
158 return -EINVAL;
159 }
160
161 /**
162 * snd_pcm_hw_param_value_max
163 * @params: the hw_params instance
164 * @var: parameter to retrieve
165 * @dir: pointer to the direction (-1,0,1) or NULL
166 *
167 * Return the maximum value for field PAR.
168 */
169 static unsigned int
170 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
171 snd_pcm_hw_param_t var, int *dir)
172 {
173 if (hw_is_mask(var)) {
174 if (dir)
175 *dir = 0;
176 return snd_mask_max(hw_param_mask_c(params, var));
177 }
178 if (hw_is_interval(var)) {
179 const struct snd_interval *i = hw_param_interval_c(params, var);
180 if (dir)
181 *dir = - (int) i->openmax;
182 return snd_interval_max(i);
183 }
184 return -EINVAL;
185 }
186
187 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
188 snd_pcm_hw_param_t var,
189 const struct snd_mask *val)
190 {
191 int changed;
192 changed = snd_mask_refine(hw_param_mask(params, var), val);
193 if (changed) {
194 params->cmask |= 1 << var;
195 params->rmask |= 1 << var;
196 }
197 return changed;
198 }
199
200 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
201 struct snd_pcm_hw_params *params,
202 snd_pcm_hw_param_t var,
203 const struct snd_mask *val)
204 {
205 int changed = _snd_pcm_hw_param_mask(params, var, val);
206 if (changed < 0)
207 return changed;
208 if (params->rmask) {
209 int err = snd_pcm_hw_refine(pcm, params);
210 if (err < 0)
211 return err;
212 }
213 return 0;
214 }
215
216 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
217 snd_pcm_hw_param_t var, unsigned int val,
218 int dir)
219 {
220 int changed;
221 int open = 0;
222 if (dir) {
223 if (dir > 0) {
224 open = 1;
225 } else if (dir < 0) {
226 if (val > 0) {
227 open = 1;
228 val--;
229 }
230 }
231 }
232 if (hw_is_mask(var))
233 changed = snd_mask_refine_min(hw_param_mask(params, var),
234 val + !!open);
235 else if (hw_is_interval(var))
236 changed = snd_interval_refine_min(hw_param_interval(params, var),
237 val, open);
238 else
239 return -EINVAL;
240 if (changed) {
241 params->cmask |= 1 << var;
242 params->rmask |= 1 << var;
243 }
244 return changed;
245 }
246
247 /**
248 * snd_pcm_hw_param_min
249 * @pcm: PCM instance
250 * @params: the hw_params instance
251 * @var: parameter to retrieve
252 * @val: minimal value
253 * @dir: pointer to the direction (-1,0,1) or NULL
254 *
255 * Inside configuration space defined by PARAMS remove from PAR all
256 * values < VAL. Reduce configuration space accordingly.
257 * Return new minimum or -EINVAL if the configuration space is empty
258 */
259 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
260 struct snd_pcm_hw_params *params,
261 snd_pcm_hw_param_t var, unsigned int val,
262 int *dir)
263 {
264 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
265 if (changed < 0)
266 return changed;
267 if (params->rmask) {
268 int err = snd_pcm_hw_refine(pcm, params);
269 if (err < 0)
270 return err;
271 }
272 return snd_pcm_hw_param_value_min(params, var, dir);
273 }
274
275 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
276 snd_pcm_hw_param_t var, unsigned int val,
277 int dir)
278 {
279 int changed;
280 int open = 0;
281 if (dir) {
282 if (dir < 0) {
283 open = 1;
284 } else if (dir > 0) {
285 open = 1;
286 val++;
287 }
288 }
289 if (hw_is_mask(var)) {
290 if (val == 0 && open) {
291 snd_mask_none(hw_param_mask(params, var));
292 changed = -EINVAL;
293 } else
294 changed = snd_mask_refine_max(hw_param_mask(params, var),
295 val - !!open);
296 } else if (hw_is_interval(var))
297 changed = snd_interval_refine_max(hw_param_interval(params, var),
298 val, open);
299 else
300 return -EINVAL;
301 if (changed) {
302 params->cmask |= 1 << var;
303 params->rmask |= 1 << var;
304 }
305 return changed;
306 }
307
308 /**
309 * snd_pcm_hw_param_max
310 * @pcm: PCM instance
311 * @params: the hw_params instance
312 * @var: parameter to retrieve
313 * @val: maximal value
314 * @dir: pointer to the direction (-1,0,1) or NULL
315 *
316 * Inside configuration space defined by PARAMS remove from PAR all
317 * values >= VAL + 1. Reduce configuration space accordingly.
318 * Return new maximum or -EINVAL if the configuration space is empty
319 */
320 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
321 struct snd_pcm_hw_params *params,
322 snd_pcm_hw_param_t var, unsigned int val,
323 int *dir)
324 {
325 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
326 if (changed < 0)
327 return changed;
328 if (params->rmask) {
329 int err = snd_pcm_hw_refine(pcm, params);
330 if (err < 0)
331 return err;
332 }
333 return snd_pcm_hw_param_value_max(params, var, dir);
334 }
335
336 static int boundary_sub(int a, int adir,
337 int b, int bdir,
338 int *c, int *cdir)
339 {
340 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
341 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
342 *c = a - b;
343 *cdir = adir - bdir;
344 if (*cdir == -2) {
345 (*c)--;
346 } else if (*cdir == 2) {
347 (*c)++;
348 }
349 return 0;
350 }
351
352 static int boundary_lt(unsigned int a, int adir,
353 unsigned int b, int bdir)
354 {
355 if (adir < 0) {
356 a--;
357 adir = 1;
358 } else if (adir > 0)
359 adir = 1;
360 if (bdir < 0) {
361 b--;
362 bdir = 1;
363 } else if (bdir > 0)
364 bdir = 1;
365 return a < b || (a == b && adir < bdir);
366 }
367
368 /* Return 1 if min is nearer to best than max */
369 static int boundary_nearer(int min, int mindir,
370 int best, int bestdir,
371 int max, int maxdir)
372 {
373 int dmin, dmindir;
374 int dmax, dmaxdir;
375 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
376 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
377 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
378 }
379
380 /**
381 * snd_pcm_hw_param_near
382 * @pcm: PCM instance
383 * @params: the hw_params instance
384 * @var: parameter to retrieve
385 * @best: value to set
386 * @dir: pointer to the direction (-1,0,1) or NULL
387 *
388 * Inside configuration space defined by PARAMS set PAR to the available value
389 * nearest to VAL. Reduce configuration space accordingly.
390 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
391 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
392 * Return the value found.
393 */
394 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
395 struct snd_pcm_hw_params *params,
396 snd_pcm_hw_param_t var, unsigned int best,
397 int *dir)
398 {
399 struct snd_pcm_hw_params *save = NULL;
400 int v;
401 unsigned int saved_min;
402 int last = 0;
403 int min, max;
404 int mindir, maxdir;
405 int valdir = dir ? *dir : 0;
406 if (best > INT_MAX)
407 best = INT_MAX;
408 min = max = best;
409 mindir = maxdir = valdir;
410 if (maxdir > 0)
411 maxdir = 0;
412 else if (maxdir == 0)
413 maxdir = -1;
414 else {
415 maxdir = 1;
416 max--;
417 }
418 save = kmalloc(sizeof(*save), GFP_KERNEL);
419 if (save == NULL)
420 return -ENOMEM;
421 *save = *params;
422 saved_min = min;
423 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
424 if (min >= 0) {
425 struct snd_pcm_hw_params *params1;
426 if (max < 0)
427 goto _end;
428 if ((unsigned int)min == saved_min && mindir == valdir)
429 goto _end;
430 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
431 if (params1 == NULL) {
432 kfree(save);
433 return -ENOMEM;
434 }
435 *params1 = *save;
436 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
437 if (max < 0) {
438 kfree(params1);
439 goto _end;
440 }
441 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
442 *params = *params1;
443 last = 1;
444 }
445 kfree(params1);
446 } else {
447 *params = *save;
448 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
449 if (max < 0)
450 return max;
451 last = 1;
452 }
453 _end:
454 kfree(save);
455 if (last)
456 v = snd_pcm_hw_param_last(pcm, params, var, dir);
457 else
458 v = snd_pcm_hw_param_first(pcm, params, var, dir);
459 snd_BUG_ON(v < 0);
460 return v;
461 }
462
463 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
464 snd_pcm_hw_param_t var, unsigned int val,
465 int dir)
466 {
467 int changed;
468 if (hw_is_mask(var)) {
469 struct snd_mask *m = hw_param_mask(params, var);
470 if (val == 0 && dir < 0) {
471 changed = -EINVAL;
472 snd_mask_none(m);
473 } else {
474 if (dir > 0)
475 val++;
476 else if (dir < 0)
477 val--;
478 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
479 }
480 } else if (hw_is_interval(var)) {
481 struct snd_interval *i = hw_param_interval(params, var);
482 if (val == 0 && dir < 0) {
483 changed = -EINVAL;
484 snd_interval_none(i);
485 } else if (dir == 0)
486 changed = snd_interval_refine_set(i, val);
487 else {
488 struct snd_interval t;
489 t.openmin = 1;
490 t.openmax = 1;
491 t.empty = 0;
492 t.integer = 0;
493 if (dir < 0) {
494 t.min = val - 1;
495 t.max = val;
496 } else {
497 t.min = val;
498 t.max = val+1;
499 }
500 changed = snd_interval_refine(i, &t);
501 }
502 } else
503 return -EINVAL;
504 if (changed) {
505 params->cmask |= 1 << var;
506 params->rmask |= 1 << var;
507 }
508 return changed;
509 }
510
511 /**
512 * snd_pcm_hw_param_set
513 * @pcm: PCM instance
514 * @params: the hw_params instance
515 * @var: parameter to retrieve
516 * @val: value to set
517 * @dir: pointer to the direction (-1,0,1) or NULL
518 *
519 * Inside configuration space defined by PARAMS remove from PAR all
520 * values != VAL. Reduce configuration space accordingly.
521 * Return VAL or -EINVAL if the configuration space is empty
522 */
523 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
524 struct snd_pcm_hw_params *params,
525 snd_pcm_hw_param_t var, unsigned int val,
526 int dir)
527 {
528 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
529 if (changed < 0)
530 return changed;
531 if (params->rmask) {
532 int err = snd_pcm_hw_refine(pcm, params);
533 if (err < 0)
534 return err;
535 }
536 return snd_pcm_hw_param_value(params, var, NULL);
537 }
538
539 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
540 snd_pcm_hw_param_t var)
541 {
542 int changed;
543 changed = snd_interval_setinteger(hw_param_interval(params, var));
544 if (changed) {
545 params->cmask |= 1 << var;
546 params->rmask |= 1 << var;
547 }
548 return changed;
549 }
550
551 /*
552 * plugin
553 */
554
555 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
556 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
557 {
558 struct snd_pcm_runtime *runtime = substream->runtime;
559 struct snd_pcm_plugin *plugin, *next;
560
561 plugin = runtime->oss.plugin_first;
562 while (plugin) {
563 next = plugin->next;
564 snd_pcm_plugin_free(plugin);
565 plugin = next;
566 }
567 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
568 return 0;
569 }
570
571 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
572 {
573 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
574 plugin->next = runtime->oss.plugin_first;
575 plugin->prev = NULL;
576 if (runtime->oss.plugin_first) {
577 runtime->oss.plugin_first->prev = plugin;
578 runtime->oss.plugin_first = plugin;
579 } else {
580 runtime->oss.plugin_last =
581 runtime->oss.plugin_first = plugin;
582 }
583 return 0;
584 }
585
586 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
587 {
588 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
589 plugin->next = NULL;
590 plugin->prev = runtime->oss.plugin_last;
591 if (runtime->oss.plugin_last) {
592 runtime->oss.plugin_last->next = plugin;
593 runtime->oss.plugin_last = plugin;
594 } else {
595 runtime->oss.plugin_last =
596 runtime->oss.plugin_first = plugin;
597 }
598 return 0;
599 }
600 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
601
602 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
603 {
604 struct snd_pcm_runtime *runtime = substream->runtime;
605 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
606 long bytes = frames_to_bytes(runtime, frames);
607 if (buffer_size == runtime->oss.buffer_bytes)
608 return bytes;
609 #if BITS_PER_LONG >= 64
610 return runtime->oss.buffer_bytes * bytes / buffer_size;
611 #else
612 {
613 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
614 return div_u64(bsize, buffer_size);
615 }
616 #endif
617 }
618
619 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
620 {
621 struct snd_pcm_runtime *runtime = substream->runtime;
622 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
623 if (buffer_size == runtime->oss.buffer_bytes)
624 return bytes_to_frames(runtime, bytes);
625 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
626 }
627
628 static inline
629 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
630 {
631 return runtime->hw_ptr_interrupt;
632 }
633
634 /* define extended formats in the recent OSS versions (if any) */
635 /* linear formats */
636 #define AFMT_S32_LE 0x00001000
637 #define AFMT_S32_BE 0x00002000
638 #define AFMT_S24_LE 0x00008000
639 #define AFMT_S24_BE 0x00010000
640 #define AFMT_S24_PACKED 0x00040000
641
642 /* other supported formats */
643 #define AFMT_FLOAT 0x00004000
644 #define AFMT_SPDIF_RAW 0x00020000
645
646 /* unsupported formats */
647 #define AFMT_AC3 0x00000400
648 #define AFMT_VORBIS 0x00000800
649
650 static int snd_pcm_oss_format_from(int format)
651 {
652 switch (format) {
653 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
654 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
655 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
656 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
657 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
658 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
659 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
660 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
661 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
662 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
663 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
664 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
665 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
666 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
667 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
668 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
669 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
670 default: return SNDRV_PCM_FORMAT_U8;
671 }
672 }
673
674 static int snd_pcm_oss_format_to(int format)
675 {
676 switch (format) {
677 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
678 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
679 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
680 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
681 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
682 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
683 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
684 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
685 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
686 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
687 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
688 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
689 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
690 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
691 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
692 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
693 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
694 default: return -EINVAL;
695 }
696 }
697
698 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
699 struct snd_pcm_hw_params *oss_params,
700 struct snd_pcm_hw_params *slave_params)
701 {
702 size_t s;
703 size_t oss_buffer_size, oss_period_size, oss_periods;
704 size_t min_period_size, max_period_size;
705 struct snd_pcm_runtime *runtime = substream->runtime;
706 size_t oss_frame_size;
707
708 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
709 params_channels(oss_params) / 8;
710
711 oss_buffer_size = snd_pcm_plug_client_size(substream,
712 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
713 oss_buffer_size = 1 << ld2(oss_buffer_size);
714 if (atomic_read(&substream->mmap_count)) {
715 if (oss_buffer_size > runtime->oss.mmap_bytes)
716 oss_buffer_size = runtime->oss.mmap_bytes;
717 }
718
719 if (substream->oss.setup.period_size > 16)
720 oss_period_size = substream->oss.setup.period_size;
721 else if (runtime->oss.fragshift) {
722 oss_period_size = 1 << runtime->oss.fragshift;
723 if (oss_period_size > oss_buffer_size / 2)
724 oss_period_size = oss_buffer_size / 2;
725 } else {
726 int sd;
727 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
728
729 oss_period_size = oss_buffer_size;
730 do {
731 oss_period_size /= 2;
732 } while (oss_period_size > bytes_per_sec);
733 if (runtime->oss.subdivision == 0) {
734 sd = 4;
735 if (oss_period_size / sd > 4096)
736 sd *= 2;
737 if (oss_period_size / sd < 4096)
738 sd = 1;
739 } else
740 sd = runtime->oss.subdivision;
741 oss_period_size /= sd;
742 if (oss_period_size < 16)
743 oss_period_size = 16;
744 }
745
746 min_period_size = snd_pcm_plug_client_size(substream,
747 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
748 min_period_size *= oss_frame_size;
749 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
750 if (oss_period_size < min_period_size)
751 oss_period_size = min_period_size;
752
753 max_period_size = snd_pcm_plug_client_size(substream,
754 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
755 max_period_size *= oss_frame_size;
756 max_period_size = 1 << ld2(max_period_size);
757 if (oss_period_size > max_period_size)
758 oss_period_size = max_period_size;
759
760 oss_periods = oss_buffer_size / oss_period_size;
761
762 if (substream->oss.setup.periods > 1)
763 oss_periods = substream->oss.setup.periods;
764
765 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
766 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
767 s = runtime->oss.maxfrags;
768 if (oss_periods > s)
769 oss_periods = s;
770
771 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
772 if (s < 2)
773 s = 2;
774 if (oss_periods < s)
775 oss_periods = s;
776
777 while (oss_period_size * oss_periods > oss_buffer_size)
778 oss_period_size /= 2;
779
780 if (oss_period_size < 16)
781 return -EINVAL;
782 runtime->oss.period_bytes = oss_period_size;
783 runtime->oss.period_frames = 1;
784 runtime->oss.periods = oss_periods;
785 return 0;
786 }
787
788 static int choose_rate(struct snd_pcm_substream *substream,
789 struct snd_pcm_hw_params *params, unsigned int best_rate)
790 {
791 struct snd_interval *it;
792 struct snd_pcm_hw_params *save;
793 unsigned int rate, prev;
794
795 save = kmalloc(sizeof(*save), GFP_KERNEL);
796 if (save == NULL)
797 return -ENOMEM;
798 *save = *params;
799 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
800
801 /* try multiples of the best rate */
802 rate = best_rate;
803 for (;;) {
804 if (it->max < rate || (it->max == rate && it->openmax))
805 break;
806 if (it->min < rate || (it->min == rate && !it->openmin)) {
807 int ret;
808 ret = snd_pcm_hw_param_set(substream, params,
809 SNDRV_PCM_HW_PARAM_RATE,
810 rate, 0);
811 if (ret == (int)rate) {
812 kfree(save);
813 return rate;
814 }
815 *params = *save;
816 }
817 prev = rate;
818 rate += best_rate;
819 if (rate <= prev)
820 break;
821 }
822
823 /* not found, use the nearest rate */
824 kfree(save);
825 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
826 }
827
828 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
829 {
830 struct snd_pcm_runtime *runtime = substream->runtime;
831 struct snd_pcm_hw_params *params, *sparams;
832 struct snd_pcm_sw_params *sw_params;
833 ssize_t oss_buffer_size, oss_period_size;
834 size_t oss_frame_size;
835 int err;
836 int direct;
837 int format, sformat, n;
838 struct snd_mask sformat_mask;
839 struct snd_mask mask;
840
841 if (mutex_lock_interruptible(&runtime->oss.params_lock))
842 return -EINTR;
843 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
844 params = kmalloc(sizeof(*params), GFP_KERNEL);
845 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
846 if (!sw_params || !params || !sparams) {
847 snd_printd("No memory\n");
848 err = -ENOMEM;
849 goto failure;
850 }
851
852 if (atomic_read(&substream->mmap_count))
853 direct = 1;
854 else
855 direct = substream->oss.setup.direct;
856
857 _snd_pcm_hw_params_any(sparams);
858 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
859 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
860 snd_mask_none(&mask);
861 if (atomic_read(&substream->mmap_count))
862 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
863 else {
864 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
865 if (!direct)
866 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
867 }
868 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
869 if (err < 0) {
870 snd_printd("No usable accesses\n");
871 err = -EINVAL;
872 goto failure;
873 }
874 choose_rate(substream, sparams, runtime->oss.rate);
875 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
876
877 format = snd_pcm_oss_format_from(runtime->oss.format);
878
879 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
880 if (direct)
881 sformat = format;
882 else
883 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
884
885 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
886 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
887 if (snd_mask_test(&sformat_mask, sformat) &&
888 snd_pcm_oss_format_to(sformat) >= 0)
889 break;
890 }
891 if (sformat > SNDRV_PCM_FORMAT_LAST) {
892 snd_printd("Cannot find a format!!!\n");
893 err = -EINVAL;
894 goto failure;
895 }
896 }
897 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
898 if (err < 0)
899 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 if (err < 0)
963 goto failure;
964
965 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
966 runtime->oss.periods, NULL);
967 if (err < 0)
968 goto failure;
969
970 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
971
972 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
973 snd_printd("HW_PARAMS failed: %i\n", err);
974 goto failure;
975 }
976
977 memset(sw_params, 0, sizeof(*sw_params));
978 if (runtime->oss.trigger) {
979 sw_params->start_threshold = 1;
980 } else {
981 sw_params->start_threshold = runtime->boundary;
982 }
983 if (atomic_read(&substream->mmap_count) ||
984 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
985 sw_params->stop_threshold = runtime->boundary;
986 else
987 sw_params->stop_threshold = runtime->buffer_size;
988 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
989 sw_params->period_step = 1;
990 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
991 1 : runtime->period_size;
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 if (oss_period_size < 0) {
1013 err = -EINVAL;
1014 goto failure;
1015 }
1016 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1017 if (runtime->oss.plugin_first) {
1018 err = snd_pcm_plug_alloc(substream, oss_period_size);
1019 if (err < 0)
1020 goto failure;
1021 }
1022 #endif
1023 oss_period_size *= oss_frame_size;
1024
1025 oss_buffer_size = oss_period_size * runtime->oss.periods;
1026 if (oss_buffer_size < 0) {
1027 err = -EINVAL;
1028 goto failure;
1029 }
1030
1031 runtime->oss.period_bytes = oss_period_size;
1032 runtime->oss.buffer_bytes = oss_buffer_size;
1033
1034 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1035 runtime->oss.period_bytes,
1036 runtime->oss.buffer_bytes);
1037 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1038 params_period_size(sparams),
1039 params_buffer_size(sparams));
1040
1041 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1042 runtime->oss.channels = params_channels(params);
1043 runtime->oss.rate = params_rate(params);
1044
1045 vfree(runtime->oss.buffer);
1046 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1047 if (!runtime->oss.buffer) {
1048 err = -ENOMEM;
1049 goto failure;
1050 }
1051
1052 runtime->oss.params = 0;
1053 runtime->oss.prepare = 1;
1054 runtime->oss.buffer_used = 0;
1055 if (runtime->dma_area)
1056 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1057
1058 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1059
1060 err = 0;
1061 failure:
1062 kfree(sw_params);
1063 kfree(params);
1064 kfree(sparams);
1065 mutex_unlock(&runtime->oss.params_lock);
1066 return err;
1067 }
1068
1069 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1070 {
1071 int idx, err;
1072 struct snd_pcm_substream *asubstream = NULL, *substream;
1073
1074 for (idx = 0; idx < 2; idx++) {
1075 substream = pcm_oss_file->streams[idx];
1076 if (substream == NULL)
1077 continue;
1078 if (asubstream == NULL)
1079 asubstream = substream;
1080 if (substream->runtime->oss.params) {
1081 err = snd_pcm_oss_change_params(substream);
1082 if (err < 0)
1083 return err;
1084 }
1085 }
1086 if (!asubstream)
1087 return -EIO;
1088 if (r_substream)
1089 *r_substream = asubstream;
1090 return 0;
1091 }
1092
1093 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1094 {
1095 int err;
1096 struct snd_pcm_runtime *runtime = substream->runtime;
1097
1098 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1099 if (err < 0) {
1100 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1101 return err;
1102 }
1103 runtime->oss.prepare = 0;
1104 runtime->oss.prev_hw_ptr_period = 0;
1105 runtime->oss.period_ptr = 0;
1106 runtime->oss.buffer_used = 0;
1107
1108 return 0;
1109 }
1110
1111 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1112 {
1113 struct snd_pcm_runtime *runtime;
1114 int err;
1115
1116 if (substream == NULL)
1117 return 0;
1118 runtime = substream->runtime;
1119 if (runtime->oss.params) {
1120 err = snd_pcm_oss_change_params(substream);
1121 if (err < 0)
1122 return err;
1123 }
1124 if (runtime->oss.prepare) {
1125 err = snd_pcm_oss_prepare(substream);
1126 if (err < 0)
1127 return err;
1128 }
1129 return 0;
1130 }
1131
1132 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1133 {
1134 struct snd_pcm_runtime *runtime;
1135 snd_pcm_uframes_t frames;
1136 int err = 0;
1137
1138 while (1) {
1139 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1140 if (err < 0)
1141 break;
1142 runtime = substream->runtime;
1143 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1144 break;
1145 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1146 /* until avail(delay) <= buffer_size */
1147 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1148 frames /= runtime->period_size;
1149 frames *= runtime->period_size;
1150 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1151 if (err < 0)
1152 break;
1153 }
1154 return err;
1155 }
1156
1157 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1158 {
1159 struct snd_pcm_runtime *runtime = substream->runtime;
1160 int ret;
1161 while (1) {
1162 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1163 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1164 #ifdef OSS_DEBUG
1165 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1166 printk(KERN_DEBUG "pcm_oss: write: "
1167 "recovering from XRUN\n");
1168 else
1169 printk(KERN_DEBUG "pcm_oss: write: "
1170 "recovering from SUSPEND\n");
1171 #endif
1172 ret = snd_pcm_oss_prepare(substream);
1173 if (ret < 0)
1174 break;
1175 }
1176 if (in_kernel) {
1177 mm_segment_t fs;
1178 fs = snd_enter_user();
1179 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1180 snd_leave_user(fs);
1181 } else {
1182 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1183 }
1184 if (ret != -EPIPE && ret != -ESTRPIPE)
1185 break;
1186 /* test, if we can't store new data, because the stream */
1187 /* has not been started */
1188 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1189 return -EAGAIN;
1190 }
1191 return ret;
1192 }
1193
1194 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1195 {
1196 struct snd_pcm_runtime *runtime = substream->runtime;
1197 snd_pcm_sframes_t delay;
1198 int ret;
1199 while (1) {
1200 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1201 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1202 #ifdef OSS_DEBUG
1203 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1204 printk(KERN_DEBUG "pcm_oss: read: "
1205 "recovering from XRUN\n");
1206 else
1207 printk(KERN_DEBUG "pcm_oss: read: "
1208 "recovering from SUSPEND\n");
1209 #endif
1210 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1211 if (ret < 0)
1212 break;
1213 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1214 ret = snd_pcm_oss_prepare(substream);
1215 if (ret < 0)
1216 break;
1217 }
1218 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1219 if (ret < 0)
1220 break;
1221 if (in_kernel) {
1222 mm_segment_t fs;
1223 fs = snd_enter_user();
1224 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1225 snd_leave_user(fs);
1226 } else {
1227 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1228 }
1229 if (ret == -EPIPE) {
1230 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1231 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1232 if (ret < 0)
1233 break;
1234 }
1235 continue;
1236 }
1237 if (ret != -ESTRPIPE)
1238 break;
1239 }
1240 return ret;
1241 }
1242
1243 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1244 {
1245 struct snd_pcm_runtime *runtime = substream->runtime;
1246 int ret;
1247 while (1) {
1248 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1249 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1250 #ifdef OSS_DEBUG
1251 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1252 printk(KERN_DEBUG "pcm_oss: writev: "
1253 "recovering from XRUN\n");
1254 else
1255 printk(KERN_DEBUG "pcm_oss: writev: "
1256 "recovering from SUSPEND\n");
1257 #endif
1258 ret = snd_pcm_oss_prepare(substream);
1259 if (ret < 0)
1260 break;
1261 }
1262 if (in_kernel) {
1263 mm_segment_t fs;
1264 fs = snd_enter_user();
1265 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1266 snd_leave_user(fs);
1267 } else {
1268 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1269 }
1270 if (ret != -EPIPE && ret != -ESTRPIPE)
1271 break;
1272
1273 /* test, if we can't store new data, because the stream */
1274 /* has not been started */
1275 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1276 return -EAGAIN;
1277 }
1278 return ret;
1279 }
1280
1281 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1282 {
1283 struct snd_pcm_runtime *runtime = substream->runtime;
1284 int ret;
1285 while (1) {
1286 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1287 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1288 #ifdef OSS_DEBUG
1289 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1290 printk(KERN_DEBUG "pcm_oss: readv: "
1291 "recovering from XRUN\n");
1292 else
1293 printk(KERN_DEBUG "pcm_oss: readv: "
1294 "recovering from SUSPEND\n");
1295 #endif
1296 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1297 if (ret < 0)
1298 break;
1299 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1300 ret = snd_pcm_oss_prepare(substream);
1301 if (ret < 0)
1302 break;
1303 }
1304 if (in_kernel) {
1305 mm_segment_t fs;
1306 fs = snd_enter_user();
1307 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1308 snd_leave_user(fs);
1309 } else {
1310 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1311 }
1312 if (ret != -EPIPE && ret != -ESTRPIPE)
1313 break;
1314 }
1315 return ret;
1316 }
1317
1318 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1319 {
1320 struct snd_pcm_runtime *runtime = substream->runtime;
1321 snd_pcm_sframes_t frames, frames1;
1322 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1323 if (runtime->oss.plugin_first) {
1324 struct snd_pcm_plugin_channel *channels;
1325 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1326 if (!in_kernel) {
1327 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1328 return -EFAULT;
1329 buf = runtime->oss.buffer;
1330 }
1331 frames = bytes / oss_frame_bytes;
1332 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1333 if (frames1 < 0)
1334 return frames1;
1335 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1336 if (frames1 <= 0)
1337 return frames1;
1338 bytes = frames1 * oss_frame_bytes;
1339 } else
1340 #endif
1341 {
1342 frames = bytes_to_frames(runtime, bytes);
1343 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1344 if (frames1 <= 0)
1345 return frames1;
1346 bytes = frames_to_bytes(runtime, frames1);
1347 }
1348 return bytes;
1349 }
1350
1351 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1352 {
1353 size_t xfer = 0;
1354 ssize_t tmp;
1355 struct snd_pcm_runtime *runtime = substream->runtime;
1356
1357 if (atomic_read(&substream->mmap_count))
1358 return -ENXIO;
1359
1360 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1361 return tmp;
1362 mutex_lock(&runtime->oss.params_lock);
1363 while (bytes > 0) {
1364 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1365 tmp = bytes;
1366 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1367 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1368 if (tmp > 0) {
1369 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1370 tmp = -EFAULT;
1371 goto err;
1372 }
1373 }
1374 runtime->oss.buffer_used += tmp;
1375 buf += tmp;
1376 bytes -= tmp;
1377 xfer += tmp;
1378 if (substream->oss.setup.partialfrag ||
1379 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1380 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1381 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1382 if (tmp <= 0)
1383 goto err;
1384 runtime->oss.bytes += tmp;
1385 runtime->oss.period_ptr += tmp;
1386 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1387 if (runtime->oss.period_ptr == 0 ||
1388 runtime->oss.period_ptr == runtime->oss.buffer_used)
1389 runtime->oss.buffer_used = 0;
1390 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1391 tmp = -EAGAIN;
1392 goto err;
1393 }
1394 }
1395 } else {
1396 tmp = snd_pcm_oss_write2(substream,
1397 (const char __force *)buf,
1398 runtime->oss.period_bytes, 0);
1399 if (tmp <= 0)
1400 goto err;
1401 runtime->oss.bytes += tmp;
1402 buf += tmp;
1403 bytes -= tmp;
1404 xfer += tmp;
1405 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1406 tmp != runtime->oss.period_bytes)
1407 break;
1408 }
1409 }
1410 mutex_unlock(&runtime->oss.params_lock);
1411 return xfer;
1412
1413 err:
1414 mutex_unlock(&runtime->oss.params_lock);
1415 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1416 }
1417
1418 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1419 {
1420 struct snd_pcm_runtime *runtime = substream->runtime;
1421 snd_pcm_sframes_t frames, frames1;
1422 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1423 char __user *final_dst = (char __user *)buf;
1424 if (runtime->oss.plugin_first) {
1425 struct snd_pcm_plugin_channel *channels;
1426 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1427 if (!in_kernel)
1428 buf = runtime->oss.buffer;
1429 frames = bytes / oss_frame_bytes;
1430 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1431 if (frames1 < 0)
1432 return frames1;
1433 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1434 if (frames1 <= 0)
1435 return frames1;
1436 bytes = frames1 * oss_frame_bytes;
1437 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1438 return -EFAULT;
1439 } else
1440 #endif
1441 {
1442 frames = bytes_to_frames(runtime, bytes);
1443 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1444 if (frames1 <= 0)
1445 return frames1;
1446 bytes = frames_to_bytes(runtime, frames1);
1447 }
1448 return bytes;
1449 }
1450
1451 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1452 {
1453 size_t xfer = 0;
1454 ssize_t tmp;
1455 struct snd_pcm_runtime *runtime = substream->runtime;
1456
1457 if (atomic_read(&substream->mmap_count))
1458 return -ENXIO;
1459
1460 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1461 return tmp;
1462 mutex_lock(&runtime->oss.params_lock);
1463 while (bytes > 0) {
1464 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1465 if (runtime->oss.buffer_used == 0) {
1466 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1467 if (tmp <= 0)
1468 goto err;
1469 runtime->oss.bytes += tmp;
1470 runtime->oss.period_ptr = tmp;
1471 runtime->oss.buffer_used = tmp;
1472 }
1473 tmp = bytes;
1474 if ((size_t) tmp > runtime->oss.buffer_used)
1475 tmp = runtime->oss.buffer_used;
1476 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1477 tmp = -EFAULT;
1478 goto err;
1479 }
1480 buf += tmp;
1481 bytes -= tmp;
1482 xfer += tmp;
1483 runtime->oss.buffer_used -= tmp;
1484 } else {
1485 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1486 runtime->oss.period_bytes, 0);
1487 if (tmp <= 0)
1488 goto err;
1489 runtime->oss.bytes += tmp;
1490 buf += tmp;
1491 bytes -= tmp;
1492 xfer += tmp;
1493 }
1494 }
1495 mutex_unlock(&runtime->oss.params_lock);
1496 return xfer;
1497
1498 err:
1499 mutex_unlock(&runtime->oss.params_lock);
1500 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1501 }
1502
1503 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1504 {
1505 struct snd_pcm_substream *substream;
1506 struct snd_pcm_runtime *runtime;
1507 int i;
1508
1509 for (i = 0; i < 2; i++) {
1510 substream = pcm_oss_file->streams[i];
1511 if (!substream)
1512 continue;
1513 runtime = substream->runtime;
1514 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1515 runtime->oss.prepare = 1;
1516 runtime->oss.buffer_used = 0;
1517 runtime->oss.prev_hw_ptr_period = 0;
1518 runtime->oss.period_ptr = 0;
1519 }
1520 return 0;
1521 }
1522
1523 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1524 {
1525 struct snd_pcm_substream *substream;
1526 int err;
1527
1528 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1529 if (substream != NULL) {
1530 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1531 return err;
1532 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1533 }
1534 /* note: all errors from the start action are ignored */
1535 /* OSS apps do not know, how to handle them */
1536 return 0;
1537 }
1538
1539 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1540 {
1541 struct snd_pcm_runtime *runtime;
1542 ssize_t result = 0;
1543 long res;
1544 wait_queue_t wait;
1545
1546 runtime = substream->runtime;
1547 init_waitqueue_entry(&wait, current);
1548 add_wait_queue(&runtime->sleep, &wait);
1549 #ifdef OSS_DEBUG
1550 printk(KERN_DEBUG "sync1: size = %li\n", size);
1551 #endif
1552 while (1) {
1553 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1554 if (result > 0) {
1555 runtime->oss.buffer_used = 0;
1556 result = 0;
1557 break;
1558 }
1559 if (result != 0 && result != -EAGAIN)
1560 break;
1561 result = 0;
1562 set_current_state(TASK_INTERRUPTIBLE);
1563 snd_pcm_stream_lock_irq(substream);
1564 res = runtime->status->state;
1565 snd_pcm_stream_unlock_irq(substream);
1566 if (res != SNDRV_PCM_STATE_RUNNING) {
1567 set_current_state(TASK_RUNNING);
1568 break;
1569 }
1570 res = schedule_timeout(10 * HZ);
1571 if (signal_pending(current)) {
1572 result = -ERESTARTSYS;
1573 break;
1574 }
1575 if (res == 0) {
1576 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1577 result = -EIO;
1578 break;
1579 }
1580 }
1581 remove_wait_queue(&runtime->sleep, &wait);
1582 return result;
1583 }
1584
1585 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1586 {
1587 int err = 0;
1588 unsigned int saved_f_flags;
1589 struct snd_pcm_substream *substream;
1590 struct snd_pcm_runtime *runtime;
1591 snd_pcm_format_t format;
1592 unsigned long width;
1593 size_t size;
1594
1595 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1596 if (substream != NULL) {
1597 runtime = substream->runtime;
1598 if (atomic_read(&substream->mmap_count))
1599 goto __direct;
1600 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1601 return err;
1602 format = snd_pcm_oss_format_from(runtime->oss.format);
1603 width = snd_pcm_format_physical_width(format);
1604 mutex_lock(&runtime->oss.params_lock);
1605 if (runtime->oss.buffer_used > 0) {
1606 #ifdef OSS_DEBUG
1607 printk(KERN_DEBUG "sync: buffer_used\n");
1608 #endif
1609 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1610 snd_pcm_format_set_silence(format,
1611 runtime->oss.buffer + runtime->oss.buffer_used,
1612 size);
1613 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1614 if (err < 0) {
1615 mutex_unlock(&runtime->oss.params_lock);
1616 return err;
1617 }
1618 } else if (runtime->oss.period_ptr > 0) {
1619 #ifdef OSS_DEBUG
1620 printk(KERN_DEBUG "sync: period_ptr\n");
1621 #endif
1622 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1623 snd_pcm_format_set_silence(format,
1624 runtime->oss.buffer,
1625 size * 8 / width);
1626 err = snd_pcm_oss_sync1(substream, size);
1627 if (err < 0) {
1628 mutex_unlock(&runtime->oss.params_lock);
1629 return err;
1630 }
1631 }
1632 /*
1633 * The ALSA's period might be a bit large than OSS one.
1634 * Fill the remain portion of ALSA period with zeros.
1635 */
1636 size = runtime->control->appl_ptr % runtime->period_size;
1637 if (size > 0) {
1638 size = runtime->period_size - size;
1639 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1640 size = (runtime->frame_bits * size) / 8;
1641 while (size > 0) {
1642 mm_segment_t fs;
1643 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1644 size -= size1;
1645 size1 *= 8;
1646 size1 /= runtime->sample_bits;
1647 snd_pcm_format_set_silence(runtime->format,
1648 runtime->oss.buffer,
1649 size1);
1650 size1 /= runtime->channels; /* frames */
1651 fs = snd_enter_user();
1652 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1653 snd_leave_user(fs);
1654 }
1655 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1656 void __user *buffers[runtime->channels];
1657 memset(buffers, 0, runtime->channels * sizeof(void *));
1658 snd_pcm_lib_writev(substream, buffers, size);
1659 }
1660 }
1661 mutex_unlock(&runtime->oss.params_lock);
1662 /*
1663 * finish sync: drain the buffer
1664 */
1665 __direct:
1666 saved_f_flags = substream->f_flags;
1667 substream->f_flags &= ~O_NONBLOCK;
1668 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1669 substream->f_flags = saved_f_flags;
1670 if (err < 0)
1671 return err;
1672 runtime->oss.prepare = 1;
1673 }
1674
1675 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1676 if (substream != NULL) {
1677 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1678 return err;
1679 runtime = substream->runtime;
1680 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1681 if (err < 0)
1682 return err;
1683 runtime->oss.buffer_used = 0;
1684 runtime->oss.prepare = 1;
1685 }
1686 return 0;
1687 }
1688
1689 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1690 {
1691 int idx;
1692
1693 for (idx = 1; idx >= 0; --idx) {
1694 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1695 struct snd_pcm_runtime *runtime;
1696 if (substream == NULL)
1697 continue;
1698 runtime = substream->runtime;
1699 if (rate < 1000)
1700 rate = 1000;
1701 else if (rate > 192000)
1702 rate = 192000;
1703 if (runtime->oss.rate != rate) {
1704 runtime->oss.params = 1;
1705 runtime->oss.rate = rate;
1706 }
1707 }
1708 return snd_pcm_oss_get_rate(pcm_oss_file);
1709 }
1710
1711 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1712 {
1713 struct snd_pcm_substream *substream;
1714 int err;
1715
1716 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1717 return err;
1718 return substream->runtime->oss.rate;
1719 }
1720
1721 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1722 {
1723 int idx;
1724 if (channels < 1)
1725 channels = 1;
1726 if (channels > 128)
1727 return -EINVAL;
1728 for (idx = 1; idx >= 0; --idx) {
1729 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1730 struct snd_pcm_runtime *runtime;
1731 if (substream == NULL)
1732 continue;
1733 runtime = substream->runtime;
1734 if (runtime->oss.channels != channels) {
1735 runtime->oss.params = 1;
1736 runtime->oss.channels = channels;
1737 }
1738 }
1739 return snd_pcm_oss_get_channels(pcm_oss_file);
1740 }
1741
1742 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1743 {
1744 struct snd_pcm_substream *substream;
1745 int err;
1746
1747 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1748 return err;
1749 return substream->runtime->oss.channels;
1750 }
1751
1752 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1753 {
1754 struct snd_pcm_substream *substream;
1755 int err;
1756
1757 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1758 return err;
1759 return substream->runtime->oss.period_bytes;
1760 }
1761
1762 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1763 {
1764 struct snd_pcm_substream *substream;
1765 int err;
1766 int direct;
1767 struct snd_pcm_hw_params *params;
1768 unsigned int formats = 0;
1769 struct snd_mask format_mask;
1770 int fmt;
1771
1772 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1773 return err;
1774 if (atomic_read(&substream->mmap_count))
1775 direct = 1;
1776 else
1777 direct = substream->oss.setup.direct;
1778 if (!direct)
1779 return AFMT_MU_LAW | AFMT_U8 |
1780 AFMT_S16_LE | AFMT_S16_BE |
1781 AFMT_S8 | AFMT_U16_LE |
1782 AFMT_U16_BE |
1783 AFMT_S32_LE | AFMT_S32_BE |
1784 AFMT_S24_LE | AFMT_S24_BE |
1785 AFMT_S24_PACKED;
1786 params = kmalloc(sizeof(*params), GFP_KERNEL);
1787 if (!params)
1788 return -ENOMEM;
1789 _snd_pcm_hw_params_any(params);
1790 err = snd_pcm_hw_refine(substream, params);
1791 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1792 kfree(params);
1793 if (err < 0)
1794 return err;
1795 for (fmt = 0; fmt < 32; ++fmt) {
1796 if (snd_mask_test(&format_mask, fmt)) {
1797 int f = snd_pcm_oss_format_to(fmt);
1798 if (f >= 0)
1799 formats |= f;
1800 }
1801 }
1802 return formats;
1803 }
1804
1805 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1806 {
1807 int formats, idx;
1808
1809 if (format != AFMT_QUERY) {
1810 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1811 if (formats < 0)
1812 return formats;
1813 if (!(formats & format))
1814 format = AFMT_U8;
1815 for (idx = 1; idx >= 0; --idx) {
1816 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1817 struct snd_pcm_runtime *runtime;
1818 if (substream == NULL)
1819 continue;
1820 runtime = substream->runtime;
1821 if (runtime->oss.format != format) {
1822 runtime->oss.params = 1;
1823 runtime->oss.format = format;
1824 }
1825 }
1826 }
1827 return snd_pcm_oss_get_format(pcm_oss_file);
1828 }
1829
1830 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1831 {
1832 struct snd_pcm_substream *substream;
1833 int err;
1834
1835 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1836 return err;
1837 return substream->runtime->oss.format;
1838 }
1839
1840 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1841 {
1842 struct snd_pcm_runtime *runtime;
1843
1844 if (substream == NULL)
1845 return 0;
1846 runtime = substream->runtime;
1847 if (subdivide == 0) {
1848 subdivide = runtime->oss.subdivision;
1849 if (subdivide == 0)
1850 subdivide = 1;
1851 return subdivide;
1852 }
1853 if (runtime->oss.subdivision || runtime->oss.fragshift)
1854 return -EINVAL;
1855 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1856 subdivide != 8 && subdivide != 16)
1857 return -EINVAL;
1858 runtime->oss.subdivision = subdivide;
1859 runtime->oss.params = 1;
1860 return subdivide;
1861 }
1862
1863 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1864 {
1865 int err = -EINVAL, idx;
1866
1867 for (idx = 1; idx >= 0; --idx) {
1868 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1869 if (substream == NULL)
1870 continue;
1871 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1872 return err;
1873 }
1874 return err;
1875 }
1876
1877 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1878 {
1879 struct snd_pcm_runtime *runtime;
1880
1881 if (substream == NULL)
1882 return 0;
1883 runtime = substream->runtime;
1884 if (runtime->oss.subdivision || runtime->oss.fragshift)
1885 return -EINVAL;
1886 runtime->oss.fragshift = val & 0xffff;
1887 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1888 if (runtime->oss.fragshift < 4) /* < 16 */
1889 runtime->oss.fragshift = 4;
1890 if (runtime->oss.maxfrags < 2)
1891 runtime->oss.maxfrags = 2;
1892 runtime->oss.params = 1;
1893 return 0;
1894 }
1895
1896 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1897 {
1898 int err = -EINVAL, idx;
1899
1900 for (idx = 1; idx >= 0; --idx) {
1901 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1902 if (substream == NULL)
1903 continue;
1904 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1905 return err;
1906 }
1907 return err;
1908 }
1909
1910 static int snd_pcm_oss_nonblock(struct file * file)
1911 {
1912 spin_lock(&file->f_lock);
1913 file->f_flags |= O_NONBLOCK;
1914 spin_unlock(&file->f_lock);
1915 return 0;
1916 }
1917
1918 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1919 {
1920
1921 if (substream == NULL) {
1922 res &= ~DSP_CAP_DUPLEX;
1923 return res;
1924 }
1925 #ifdef DSP_CAP_MULTI
1926 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1927 if (substream->pstr->substream_count > 1)
1928 res |= DSP_CAP_MULTI;
1929 #endif
1930 /* DSP_CAP_REALTIME is set all times: */
1931 /* all ALSA drivers can return actual pointer in ring buffer */
1932 return res;
1933 }
1934
1935 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1936 {
1937 int result, idx;
1938
1939 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1940 for (idx = 0; idx < 2; idx++) {
1941 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1942 result = snd_pcm_oss_get_caps1(substream, result);
1943 }
1944 result |= 0x0001; /* revision - same as SB AWE 64 */
1945 return result;
1946 }
1947
1948 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1949 snd_pcm_uframes_t hw_ptr)
1950 {
1951 struct snd_pcm_runtime *runtime = substream->runtime;
1952 snd_pcm_uframes_t appl_ptr;
1953 appl_ptr = hw_ptr + runtime->buffer_size;
1954 appl_ptr %= runtime->boundary;
1955 runtime->control->appl_ptr = appl_ptr;
1956 }
1957
1958 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1959 {
1960 struct snd_pcm_runtime *runtime;
1961 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1962 int err, cmd;
1963
1964 #ifdef OSS_DEBUG
1965 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1966 #endif
1967
1968 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1969 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1970
1971 if (psubstream) {
1972 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1973 return err;
1974 }
1975 if (csubstream) {
1976 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1977 return err;
1978 }
1979 if (psubstream) {
1980 runtime = psubstream->runtime;
1981 if (trigger & PCM_ENABLE_OUTPUT) {
1982 if (runtime->oss.trigger)
1983 goto _skip1;
1984 if (atomic_read(&psubstream->mmap_count))
1985 snd_pcm_oss_simulate_fill(psubstream,
1986 get_hw_ptr_period(runtime));
1987 runtime->oss.trigger = 1;
1988 runtime->start_threshold = 1;
1989 cmd = SNDRV_PCM_IOCTL_START;
1990 } else {
1991 if (!runtime->oss.trigger)
1992 goto _skip1;
1993 runtime->oss.trigger = 0;
1994 runtime->start_threshold = runtime->boundary;
1995 cmd = SNDRV_PCM_IOCTL_DROP;
1996 runtime->oss.prepare = 1;
1997 }
1998 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1999 if (err < 0)
2000 return err;
2001 }
2002 _skip1:
2003 if (csubstream) {
2004 runtime = csubstream->runtime;
2005 if (trigger & PCM_ENABLE_INPUT) {
2006 if (runtime->oss.trigger)
2007 goto _skip2;
2008 runtime->oss.trigger = 1;
2009 runtime->start_threshold = 1;
2010 cmd = SNDRV_PCM_IOCTL_START;
2011 } else {
2012 if (!runtime->oss.trigger)
2013 goto _skip2;
2014 runtime->oss.trigger = 0;
2015 runtime->start_threshold = runtime->boundary;
2016 cmd = SNDRV_PCM_IOCTL_DROP;
2017 runtime->oss.prepare = 1;
2018 }
2019 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2020 if (err < 0)
2021 return err;
2022 }
2023 _skip2:
2024 return 0;
2025 }
2026
2027 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2028 {
2029 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2030 int result = 0;
2031
2032 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2033 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2034 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2035 result |= PCM_ENABLE_OUTPUT;
2036 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2037 result |= PCM_ENABLE_INPUT;
2038 return result;
2039 }
2040
2041 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2042 {
2043 struct snd_pcm_substream *substream;
2044 struct snd_pcm_runtime *runtime;
2045 snd_pcm_sframes_t delay;
2046 int err;
2047
2048 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2049 if (substream == NULL)
2050 return -EINVAL;
2051 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2052 return err;
2053 runtime = substream->runtime;
2054 if (runtime->oss.params || runtime->oss.prepare)
2055 return 0;
2056 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2057 if (err == -EPIPE)
2058 delay = 0; /* hack for broken OSS applications */
2059 else if (err < 0)
2060 return err;
2061 return snd_pcm_oss_bytes(substream, delay);
2062 }
2063
2064 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2065 {
2066 struct snd_pcm_substream *substream;
2067 struct snd_pcm_runtime *runtime;
2068 snd_pcm_sframes_t delay;
2069 int fixup;
2070 struct count_info info;
2071 int err;
2072
2073 if (_info == NULL)
2074 return -EFAULT;
2075 substream = pcm_oss_file->streams[stream];
2076 if (substream == NULL)
2077 return -EINVAL;
2078 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2079 return err;
2080 runtime = substream->runtime;
2081 if (runtime->oss.params || runtime->oss.prepare) {
2082 memset(&info, 0, sizeof(info));
2083 if (copy_to_user(_info, &info, sizeof(info)))
2084 return -EFAULT;
2085 return 0;
2086 }
2087 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2088 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2089 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2090 err = 0;
2091 delay = 0;
2092 fixup = 0;
2093 } else {
2094 fixup = runtime->oss.buffer_used;
2095 }
2096 } else {
2097 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2098 fixup = -runtime->oss.buffer_used;
2099 }
2100 if (err < 0)
2101 return err;
2102 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2103 if (atomic_read(&substream->mmap_count)) {
2104 snd_pcm_sframes_t n;
2105 delay = get_hw_ptr_period(runtime);
2106 n = delay - runtime->oss.prev_hw_ptr_period;
2107 if (n < 0)
2108 n += runtime->boundary;
2109 info.blocks = n / runtime->period_size;
2110 runtime->oss.prev_hw_ptr_period = delay;
2111 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2112 snd_pcm_oss_simulate_fill(substream, delay);
2113 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2114 } else {
2115 delay = snd_pcm_oss_bytes(substream, delay);
2116 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2117 if (substream->oss.setup.buggyptr)
2118 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2119 else
2120 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2121 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2122 } else {
2123 delay += fixup;
2124 info.blocks = delay / runtime->oss.period_bytes;
2125 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2126 }
2127 }
2128 if (copy_to_user(_info, &info, sizeof(info)))
2129 return -EFAULT;
2130 return 0;
2131 }
2132
2133 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2134 {
2135 struct snd_pcm_substream *substream;
2136 struct snd_pcm_runtime *runtime;
2137 snd_pcm_sframes_t avail;
2138 int fixup;
2139 struct audio_buf_info info;
2140 int err;
2141
2142 if (_info == NULL)
2143 return -EFAULT;
2144 substream = pcm_oss_file->streams[stream];
2145 if (substream == NULL)
2146 return -EINVAL;
2147 runtime = substream->runtime;
2148
2149 if (runtime->oss.params &&
2150 (err = snd_pcm_oss_change_params(substream)) < 0)
2151 return err;
2152
2153 info.fragsize = runtime->oss.period_bytes;
2154 info.fragstotal = runtime->periods;
2155 if (runtime->oss.prepare) {
2156 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2157 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2158 info.fragments = runtime->oss.periods;
2159 } else {
2160 info.bytes = 0;
2161 info.fragments = 0;
2162 }
2163 } else {
2164 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2165 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2166 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2167 avail = runtime->buffer_size;
2168 err = 0;
2169 fixup = 0;
2170 } else {
2171 avail = runtime->buffer_size - avail;
2172 fixup = -runtime->oss.buffer_used;
2173 }
2174 } else {
2175 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2176 fixup = runtime->oss.buffer_used;
2177 }
2178 if (err < 0)
2179 return err;
2180 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2181 info.fragments = info.bytes / runtime->oss.period_bytes;
2182 }
2183
2184 #ifdef OSS_DEBUG
2185 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2186 "fragstotal = %i, fragsize = %i\n",
2187 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2188 #endif
2189 if (copy_to_user(_info, &info, sizeof(info)))
2190 return -EFAULT;
2191 return 0;
2192 }
2193
2194 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2195 {
2196 // it won't be probably implemented
2197 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2198 return -EINVAL;
2199 }
2200
2201 static const char *strip_task_path(const char *path)
2202 {
2203 const char *ptr, *ptrl = NULL;
2204 for (ptr = path; *ptr; ptr++) {
2205 if (*ptr == '/')
2206 ptrl = ptr + 1;
2207 }
2208 return ptrl;
2209 }
2210
2211 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2212 const char *task_name,
2213 struct snd_pcm_oss_setup *rsetup)
2214 {
2215 struct snd_pcm_oss_setup *setup;
2216
2217 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2218 do {
2219 for (setup = pcm->streams[stream].oss.setup_list; setup;
2220 setup = setup->next) {
2221 if (!strcmp(setup->task_name, task_name))
2222 goto out;
2223 }
2224 } while ((task_name = strip_task_path(task_name)) != NULL);
2225 out:
2226 if (setup)
2227 *rsetup = *setup;
2228 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2229 }
2230
2231 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2232 {
2233 struct snd_pcm_runtime *runtime;
2234 runtime = substream->runtime;
2235 vfree(runtime->oss.buffer);
2236 runtime->oss.buffer = NULL;
2237 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2238 snd_pcm_oss_plugin_clear(substream);
2239 #endif
2240 substream->oss.oss = 0;
2241 }
2242
2243 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2244 struct snd_pcm_oss_setup *setup,
2245 int minor)
2246 {
2247 struct snd_pcm_runtime *runtime;
2248
2249 substream->oss.oss = 1;
2250 substream->oss.setup = *setup;
2251 if (setup->nonblock)
2252 substream->f_flags |= O_NONBLOCK;
2253 else if (setup->block)
2254 substream->f_flags &= ~O_NONBLOCK;
2255 runtime = substream->runtime;
2256 runtime->oss.params = 1;
2257 runtime->oss.trigger = 1;
2258 runtime->oss.rate = 8000;
2259 mutex_init(&runtime->oss.params_lock);
2260 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2261 case SNDRV_MINOR_OSS_PCM_8:
2262 runtime->oss.format = AFMT_U8;
2263 break;
2264 case SNDRV_MINOR_OSS_PCM_16:
2265 runtime->oss.format = AFMT_S16_LE;
2266 break;
2267 default:
2268 runtime->oss.format = AFMT_MU_LAW;
2269 }
2270 runtime->oss.channels = 1;
2271 runtime->oss.fragshift = 0;
2272 runtime->oss.maxfrags = 0;
2273 runtime->oss.subdivision = 0;
2274 substream->pcm_release = snd_pcm_oss_release_substream;
2275 }
2276
2277 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2278 {
2279 int cidx;
2280 if (!pcm_oss_file)
2281 return 0;
2282 for (cidx = 0; cidx < 2; ++cidx) {
2283 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2284 if (substream)
2285 snd_pcm_release_substream(substream);
2286 }
2287 kfree(pcm_oss_file);
2288 return 0;
2289 }
2290
2291 static int snd_pcm_oss_open_file(struct file *file,
2292 struct snd_pcm *pcm,
2293 struct snd_pcm_oss_file **rpcm_oss_file,
2294 int minor,
2295 struct snd_pcm_oss_setup *setup)
2296 {
2297 int idx, err;
2298 struct snd_pcm_oss_file *pcm_oss_file;
2299 struct snd_pcm_substream *substream;
2300 fmode_t f_mode = file->f_mode;
2301
2302 if (rpcm_oss_file)
2303 *rpcm_oss_file = NULL;
2304
2305 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2306 if (pcm_oss_file == NULL)
2307 return -ENOMEM;
2308
2309 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2310 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2311 f_mode = FMODE_WRITE;
2312
2313 file->f_flags &= ~O_APPEND;
2314 for (idx = 0; idx < 2; idx++) {
2315 if (setup[idx].disable)
2316 continue;
2317 if (! pcm->streams[idx].substream_count)
2318 continue; /* no matching substream */
2319 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2320 if (! (f_mode & FMODE_WRITE))
2321 continue;
2322 } else {
2323 if (! (f_mode & FMODE_READ))
2324 continue;
2325 }
2326 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2327 if (err < 0) {
2328 snd_pcm_oss_release_file(pcm_oss_file);
2329 return err;
2330 }
2331
2332 pcm_oss_file->streams[idx] = substream;
2333 substream->file = pcm_oss_file;
2334 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2335 }
2336
2337 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2338 snd_pcm_oss_release_file(pcm_oss_file);
2339 return -EINVAL;
2340 }
2341
2342 file->private_data = pcm_oss_file;
2343 if (rpcm_oss_file)
2344 *rpcm_oss_file = pcm_oss_file;
2345 return 0;
2346 }
2347
2348
2349 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2350 {
2351 unsigned int idx;
2352
2353 if (snd_BUG_ON(!task || !name || size < 2))
2354 return -EINVAL;
2355 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2356 name[idx] = task->comm[idx];
2357 name[idx] = '\0';
2358 return 0;
2359 }
2360
2361 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2362 {
2363 int err;
2364 char task_name[32];
2365 struct snd_pcm *pcm;
2366 struct snd_pcm_oss_file *pcm_oss_file;
2367 struct snd_pcm_oss_setup setup[2];
2368 int nonblock;
2369 wait_queue_t wait;
2370
2371 err = nonseekable_open(inode, file);
2372 if (err < 0)
2373 return err;
2374
2375 pcm = snd_lookup_oss_minor_data(iminor(inode),
2376 SNDRV_OSS_DEVICE_TYPE_PCM);
2377 if (pcm == NULL) {
2378 err = -ENODEV;
2379 goto __error1;
2380 }
2381 err = snd_card_file_add(pcm->card, file);
2382 if (err < 0)
2383 goto __error1;
2384 if (!try_module_get(pcm->card->module)) {
2385 err = -EFAULT;
2386 goto __error2;
2387 }
2388 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2389 err = -EFAULT;
2390 goto __error;
2391 }
2392 memset(setup, 0, sizeof(setup));
2393 if (file->f_mode & FMODE_WRITE)
2394 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2395 task_name, &setup[0]);
2396 if (file->f_mode & FMODE_READ)
2397 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2398 task_name, &setup[1]);
2399
2400 nonblock = !!(file->f_flags & O_NONBLOCK);
2401 if (!nonblock)
2402 nonblock = nonblock_open;
2403
2404 init_waitqueue_entry(&wait, current);
2405 add_wait_queue(&pcm->open_wait, &wait);
2406 mutex_lock(&pcm->open_mutex);
2407 while (1) {
2408 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2409 iminor(inode), setup);
2410 if (err >= 0)
2411 break;
2412 if (err == -EAGAIN) {
2413 if (nonblock) {
2414 err = -EBUSY;
2415 break;
2416 }
2417 } else
2418 break;
2419 set_current_state(TASK_INTERRUPTIBLE);
2420 mutex_unlock(&pcm->open_mutex);
2421 schedule();
2422 mutex_lock(&pcm->open_mutex);
2423 if (signal_pending(current)) {
2424 err = -ERESTARTSYS;
2425 break;
2426 }
2427 }
2428 remove_wait_queue(&pcm->open_wait, &wait);
2429 mutex_unlock(&pcm->open_mutex);
2430 if (err < 0)
2431 goto __error;
2432 return err;
2433
2434 __error:
2435 module_put(pcm->card->module);
2436 __error2:
2437 snd_card_file_remove(pcm->card, file);
2438 __error1:
2439 return err;
2440 }
2441
2442 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2443 {
2444 struct snd_pcm *pcm;
2445 struct snd_pcm_substream *substream;
2446 struct snd_pcm_oss_file *pcm_oss_file;
2447
2448 pcm_oss_file = file->private_data;
2449 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2450 if (substream == NULL)
2451 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2452 if (snd_BUG_ON(!substream))
2453 return -ENXIO;
2454 pcm = substream->pcm;
2455 if (!pcm->card->shutdown)
2456 snd_pcm_oss_sync(pcm_oss_file);
2457 mutex_lock(&pcm->open_mutex);
2458 snd_pcm_oss_release_file(pcm_oss_file);
2459 mutex_unlock(&pcm->open_mutex);
2460 wake_up(&pcm->open_wait);
2461 module_put(pcm->card->module);
2462 snd_card_file_remove(pcm->card, file);
2463 return 0;
2464 }
2465
2466 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2467 {
2468 struct snd_pcm_oss_file *pcm_oss_file;
2469 int __user *p = (int __user *)arg;
2470 int res;
2471
2472 pcm_oss_file = file->private_data;
2473 if (cmd == OSS_GETVERSION)
2474 return put_user(SNDRV_OSS_VERSION, p);
2475 if (cmd == OSS_ALSAEMULVER)
2476 return put_user(1, p);
2477 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && \
2478 defined(CONFIG_SND_MIXER_OSS_MODULE))
2479 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2480 struct snd_pcm_substream *substream;
2481 int idx;
2482 for (idx = 0; idx < 2; ++idx) {
2483 substream = pcm_oss_file->streams[idx];
2484 if (substream != NULL)
2485 break;
2486 }
2487 if (snd_BUG_ON(idx >= 2))
2488 return -ENXIO;
2489 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2490 }
2491 #endif
2492 if (((cmd >> 8) & 0xff) != 'P')
2493 return -EINVAL;
2494 #ifdef OSS_DEBUG
2495 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2496 #endif
2497 switch (cmd) {
2498 case SNDCTL_DSP_RESET:
2499 return snd_pcm_oss_reset(pcm_oss_file);
2500 case SNDCTL_DSP_SYNC:
2501 return snd_pcm_oss_sync(pcm_oss_file);
2502 case SNDCTL_DSP_SPEED:
2503 if (get_user(res, p))
2504 return -EFAULT;
2505 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2506 return res;
2507 return put_user(res, p);
2508 case SOUND_PCM_READ_RATE:
2509 res = snd_pcm_oss_get_rate(pcm_oss_file);
2510 if (res < 0)
2511 return res;
2512 return put_user(res, p);
2513 case SNDCTL_DSP_STEREO:
2514 if (get_user(res, p))
2515 return -EFAULT;
2516 res = res > 0 ? 2 : 1;
2517 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2518 return res;
2519 return put_user(--res, p);
2520 case SNDCTL_DSP_GETBLKSIZE:
2521 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2522 if (res < 0)
2523 return res;
2524 return put_user(res, p);
2525 case SNDCTL_DSP_SETFMT:
2526 if (get_user(res, p))
2527 return -EFAULT;
2528 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2529 if (res < 0)
2530 return res;
2531 return put_user(res, p);
2532 case SOUND_PCM_READ_BITS:
2533 res = snd_pcm_oss_get_format(pcm_oss_file);
2534 if (res < 0)
2535 return res;
2536 return put_user(res, p);
2537 case SNDCTL_DSP_CHANNELS:
2538 if (get_user(res, p))
2539 return -EFAULT;
2540 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2541 if (res < 0)
2542 return res;
2543 return put_user(res, p);
2544 case SOUND_PCM_READ_CHANNELS:
2545 res = snd_pcm_oss_get_channels(pcm_oss_file);
2546 if (res < 0)
2547 return res;
2548 return put_user(res, p);
2549 case SOUND_PCM_WRITE_FILTER:
2550 case SOUND_PCM_READ_FILTER:
2551 return -EIO;
2552 case SNDCTL_DSP_POST:
2553 return snd_pcm_oss_post(pcm_oss_file);
2554 case SNDCTL_DSP_SUBDIVIDE:
2555 if (get_user(res, p))
2556 return -EFAULT;
2557 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2558 if (res < 0)
2559 return res;
2560 return put_user(res, p);
2561 case SNDCTL_DSP_SETFRAGMENT:
2562 if (get_user(res, p))
2563 return -EFAULT;
2564 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2565 case SNDCTL_DSP_GETFMTS:
2566 res = snd_pcm_oss_get_formats(pcm_oss_file);
2567 if (res < 0)
2568 return res;
2569 return put_user(res, p);
2570 case SNDCTL_DSP_GETOSPACE:
2571 case SNDCTL_DSP_GETISPACE:
2572 return snd_pcm_oss_get_space(pcm_oss_file,
2573 cmd == SNDCTL_DSP_GETISPACE ?
2574 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2575 (struct audio_buf_info __user *) arg);
2576 case SNDCTL_DSP_NONBLOCK:
2577 return snd_pcm_oss_nonblock(file);
2578 case SNDCTL_DSP_GETCAPS:
2579 res = snd_pcm_oss_get_caps(pcm_oss_file);
2580 if (res < 0)
2581 return res;
2582 return put_user(res, p);
2583 case SNDCTL_DSP_GETTRIGGER:
2584 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2585 if (res < 0)
2586 return res;
2587 return put_user(res, p);
2588 case SNDCTL_DSP_SETTRIGGER:
2589 if (get_user(res, p))
2590 return -EFAULT;
2591 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2592 case SNDCTL_DSP_GETIPTR:
2593 case SNDCTL_DSP_GETOPTR:
2594 return snd_pcm_oss_get_ptr(pcm_oss_file,
2595 cmd == SNDCTL_DSP_GETIPTR ?
2596 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2597 (struct count_info __user *) arg);
2598 case SNDCTL_DSP_MAPINBUF:
2599 case SNDCTL_DSP_MAPOUTBUF:
2600 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2601 cmd == SNDCTL_DSP_MAPINBUF ?
2602 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2603 (struct buffmem_desc __user *) arg);
2604 case SNDCTL_DSP_SETSYNCRO:
2605 /* stop DMA now.. */
2606 return 0;
2607 case SNDCTL_DSP_SETDUPLEX:
2608 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2609 return 0;
2610 return -EIO;
2611 case SNDCTL_DSP_GETODELAY:
2612 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2613 if (res < 0) {
2614 /* it's for sure, some broken apps don't check for error codes */
2615 put_user(0, p);
2616 return res;
2617 }
2618 return put_user(res, p);
2619 case SNDCTL_DSP_PROFILE:
2620 return 0; /* silently ignore */
2621 default:
2622 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2623 }
2624 return -EINVAL;
2625 }
2626
2627 #ifdef CONFIG_COMPAT
2628 /* all compatible */
2629 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2630 #else
2631 #define snd_pcm_oss_ioctl_compat NULL
2632 #endif
2633
2634 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2635 {
2636 struct snd_pcm_oss_file *pcm_oss_file;
2637 struct snd_pcm_substream *substream;
2638
2639 pcm_oss_file = file->private_data;
2640 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2641 if (substream == NULL)
2642 return -ENXIO;
2643 substream->f_flags = file->f_flags & O_NONBLOCK;
2644 #ifndef OSS_DEBUG
2645 return snd_pcm_oss_read1(substream, buf, count);
2646 #else
2647 {
2648 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2649 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2650 "(returned %li bytes)\n", (long)count, (long)res);
2651 return res;
2652 }
2653 #endif
2654 }
2655
2656 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2657 {
2658 struct snd_pcm_oss_file *pcm_oss_file;
2659 struct snd_pcm_substream *substream;
2660 long result;
2661
2662 pcm_oss_file = file->private_data;
2663 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2664 if (substream == NULL)
2665 return -ENXIO;
2666 substream->f_flags = file->f_flags & O_NONBLOCK;
2667 result = snd_pcm_oss_write1(substream, buf, count);
2668 #ifdef OSS_DEBUG
2669 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2670 (long)count, (long)result);
2671 #endif
2672 return result;
2673 }
2674
2675 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2676 {
2677 struct snd_pcm_runtime *runtime = substream->runtime;
2678 if (atomic_read(&substream->mmap_count))
2679 return runtime->oss.prev_hw_ptr_period !=
2680 get_hw_ptr_period(runtime);
2681 else
2682 return snd_pcm_playback_avail(runtime) >=
2683 runtime->oss.period_frames;
2684 }
2685
2686 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2687 {
2688 struct snd_pcm_runtime *runtime = substream->runtime;
2689 if (atomic_read(&substream->mmap_count))
2690 return runtime->oss.prev_hw_ptr_period !=
2691 get_hw_ptr_period(runtime);
2692 else
2693 return snd_pcm_capture_avail(runtime) >=
2694 runtime->oss.period_frames;
2695 }
2696
2697 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2698 {
2699 struct snd_pcm_oss_file *pcm_oss_file;
2700 unsigned int mask;
2701 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2702
2703 pcm_oss_file = file->private_data;
2704
2705 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2706 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2707
2708 mask = 0;
2709 if (psubstream != NULL) {
2710 struct snd_pcm_runtime *runtime = psubstream->runtime;
2711 poll_wait(file, &runtime->sleep, wait);
2712 snd_pcm_stream_lock_irq(psubstream);
2713 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2714 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2715 snd_pcm_oss_playback_ready(psubstream)))
2716 mask |= POLLOUT | POLLWRNORM;
2717 snd_pcm_stream_unlock_irq(psubstream);
2718 }
2719 if (csubstream != NULL) {
2720 struct snd_pcm_runtime *runtime = csubstream->runtime;
2721 snd_pcm_state_t ostate;
2722 poll_wait(file, &runtime->sleep, wait);
2723 snd_pcm_stream_lock_irq(csubstream);
2724 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2725 snd_pcm_oss_capture_ready(csubstream))
2726 mask |= POLLIN | POLLRDNORM;
2727 snd_pcm_stream_unlock_irq(csubstream);
2728 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2729 struct snd_pcm_oss_file ofile;
2730 memset(&ofile, 0, sizeof(ofile));
2731 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2732 runtime->oss.trigger = 0;
2733 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2734 }
2735 }
2736
2737 return mask;
2738 }
2739
2740 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2741 {
2742 struct snd_pcm_oss_file *pcm_oss_file;
2743 struct snd_pcm_substream *substream = NULL;
2744 struct snd_pcm_runtime *runtime;
2745 int err;
2746
2747 #ifdef OSS_DEBUG
2748 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2749 #endif
2750 pcm_oss_file = file->private_data;
2751 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2752 case VM_READ | VM_WRITE:
2753 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2754 if (substream)
2755 break;
2756 /* Fall through */
2757 case VM_READ:
2758 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2759 break;
2760 case VM_WRITE:
2761 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2762 break;
2763 default:
2764 return -EINVAL;
2765 }
2766 /* set VM_READ access as well to fix memset() routines that do
2767 reads before writes (to improve performance) */
2768 area->vm_flags |= VM_READ;
2769 if (substream == NULL)
2770 return -ENXIO;
2771 runtime = substream->runtime;
2772 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2773 return -EIO;
2774 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2775 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2776 else
2777 return -EIO;
2778
2779 if (runtime->oss.params) {
2780 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2781 return err;
2782 }
2783 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2784 if (runtime->oss.plugin_first != NULL)
2785 return -EIO;
2786 #endif
2787
2788 if (area->vm_pgoff != 0)
2789 return -EINVAL;
2790
2791 err = snd_pcm_mmap_data(substream, file, area);
2792 if (err < 0)
2793 return err;
2794 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2795 runtime->silence_threshold = 0;
2796 runtime->silence_size = 0;
2797 #ifdef OSS_DEBUG
2798 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2799 runtime->oss.mmap_bytes);
2800 #endif
2801 /* In mmap mode we never stop */
2802 runtime->stop_threshold = runtime->boundary;
2803
2804 return 0;
2805 }
2806
2807 #ifdef CONFIG_SND_VERBOSE_PROCFS
2808 /*
2809 * /proc interface
2810 */
2811
2812 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2813 struct snd_info_buffer *buffer)
2814 {
2815 struct snd_pcm_str *pstr = entry->private_data;
2816 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2817 mutex_lock(&pstr->oss.setup_mutex);
2818 while (setup) {
2819 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2820 setup->task_name,
2821 setup->periods,
2822 setup->period_size,
2823 setup->disable ? " disable" : "",
2824 setup->direct ? " direct" : "",
2825 setup->block ? " block" : "",
2826 setup->nonblock ? " non-block" : "",
2827 setup->partialfrag ? " partial-frag" : "",
2828 setup->nosilence ? " no-silence" : "");
2829 setup = setup->next;
2830 }
2831 mutex_unlock(&pstr->oss.setup_mutex);
2832 }
2833
2834 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2835 {
2836 struct snd_pcm_oss_setup *setup, *setupn;
2837
2838 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2839 setup; setup = setupn) {
2840 setupn = setup->next;
2841 kfree(setup->task_name);
2842 kfree(setup);
2843 }
2844 pstr->oss.setup_list = NULL;
2845 }
2846
2847 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2848 struct snd_info_buffer *buffer)
2849 {
2850 struct snd_pcm_str *pstr = entry->private_data;
2851 char line[128], str[32], task_name[32];
2852 const char *ptr;
2853 int idx1;
2854 struct snd_pcm_oss_setup *setup, *setup1, template;
2855
2856 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2857 mutex_lock(&pstr->oss.setup_mutex);
2858 memset(&template, 0, sizeof(template));
2859 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2860 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2861 snd_pcm_oss_proc_free_setup_list(pstr);
2862 mutex_unlock(&pstr->oss.setup_mutex);
2863 continue;
2864 }
2865 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2866 if (!strcmp(setup->task_name, task_name)) {
2867 template = *setup;
2868 break;
2869 }
2870 }
2871 ptr = snd_info_get_str(str, ptr, sizeof(str));
2872 template.periods = simple_strtoul(str, NULL, 10);
2873 ptr = snd_info_get_str(str, ptr, sizeof(str));
2874 template.period_size = simple_strtoul(str, NULL, 10);
2875 for (idx1 = 31; idx1 >= 0; idx1--)
2876 if (template.period_size & (1 << idx1))
2877 break;
2878 for (idx1--; idx1 >= 0; idx1--)
2879 template.period_size &= ~(1 << idx1);
2880 do {
2881 ptr = snd_info_get_str(str, ptr, sizeof(str));
2882 if (!strcmp(str, "disable")) {
2883 template.disable = 1;
2884 } else if (!strcmp(str, "direct")) {
2885 template.direct = 1;
2886 } else if (!strcmp(str, "block")) {
2887 template.block = 1;
2888 } else if (!strcmp(str, "non-block")) {
2889 template.nonblock = 1;
2890 } else if (!strcmp(str, "partial-frag")) {
2891 template.partialfrag = 1;
2892 } else if (!strcmp(str, "no-silence")) {
2893 template.nosilence = 1;
2894 } else if (!strcmp(str, "buggy-ptr")) {
2895 template.buggyptr = 1;
2896 }
2897 } while (*str);
2898 if (setup == NULL) {
2899 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2900 if (! setup) {
2901 buffer->error = -ENOMEM;
2902 mutex_unlock(&pstr->oss.setup_mutex);
2903 return;
2904 }
2905 if (pstr->oss.setup_list == NULL)
2906 pstr->oss.setup_list = setup;
2907 else {
2908 for (setup1 = pstr->oss.setup_list;
2909 setup1->next; setup1 = setup1->next);
2910 setup1->next = setup;
2911 }
2912 template.task_name = kstrdup(task_name, GFP_KERNEL);
2913 if (! template.task_name) {
2914 kfree(setup);
2915 buffer->error = -ENOMEM;
2916 mutex_unlock(&pstr->oss.setup_mutex);
2917 return;
2918 }
2919 }
2920 *setup = template;
2921 mutex_unlock(&pstr->oss.setup_mutex);
2922 }
2923 }
2924
2925 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2926 {
2927 int stream;
2928 for (stream = 0; stream < 2; ++stream) {
2929 struct snd_info_entry *entry;
2930 struct snd_pcm_str *pstr = &pcm->streams[stream];
2931 if (pstr->substream_count == 0)
2932 continue;
2933 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2934 entry->content = SNDRV_INFO_CONTENT_TEXT;
2935 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2936 entry->c.text.read = snd_pcm_oss_proc_read;
2937 entry->c.text.write = snd_pcm_oss_proc_write;
2938 entry->private_data = pstr;
2939 if (snd_info_register(entry) < 0) {
2940 snd_info_free_entry(entry);
2941 entry = NULL;
2942 }
2943 }
2944 pstr->oss.proc_entry = entry;
2945 }
2946 }
2947
2948 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2949 {
2950 int stream;
2951 for (stream = 0; stream < 2; ++stream) {
2952 struct snd_pcm_str *pstr = &pcm->streams[stream];
2953 snd_info_free_entry(pstr->oss.proc_entry);
2954 pstr->oss.proc_entry = NULL;
2955 snd_pcm_oss_proc_free_setup_list(pstr);
2956 }
2957 }
2958 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2959 #define snd_pcm_oss_proc_init(pcm)
2960 #define snd_pcm_oss_proc_done(pcm)
2961 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2962
2963 /*
2964 * ENTRY functions
2965 */
2966
2967 static const struct file_operations snd_pcm_oss_f_reg =
2968 {
2969 .owner = THIS_MODULE,
2970 .read = snd_pcm_oss_read,
2971 .write = snd_pcm_oss_write,
2972 .open = snd_pcm_oss_open,
2973 .release = snd_pcm_oss_release,
2974 .llseek = no_llseek,
2975 .poll = snd_pcm_oss_poll,
2976 .unlocked_ioctl = snd_pcm_oss_ioctl,
2977 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2978 .mmap = snd_pcm_oss_mmap,
2979 };
2980
2981 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2982 {
2983 char name[128];
2984 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2985 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2986 pcm->card, index, &snd_pcm_oss_f_reg,
2987 pcm, name) < 0) {
2988 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2989 pcm->card->number, pcm->device);
2990 }
2991 }
2992
2993 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2994 {
2995 pcm->oss.reg = 0;
2996 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2997 char name[128];
2998 int duplex;
2999 register_oss_dsp(pcm, 0);
3000 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3001 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3002 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3003 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3004 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3005 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3006 pcm->card->number,
3007 name);
3008 #endif
3009 pcm->oss.reg++;
3010 pcm->oss.reg_mask |= 1;
3011 }
3012 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3013 register_oss_dsp(pcm, 1);
3014 pcm->oss.reg++;
3015 pcm->oss.reg_mask |= 2;
3016 }
3017
3018 if (pcm->oss.reg)
3019 snd_pcm_oss_proc_init(pcm);
3020
3021 return 0;
3022 }
3023
3024 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3025 {
3026 if (pcm->oss.reg) {
3027 if (pcm->oss.reg_mask & 1) {
3028 pcm->oss.reg_mask &= ~1;
3029 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3030 pcm->card, 0);
3031 }
3032 if (pcm->oss.reg_mask & 2) {
3033 pcm->oss.reg_mask &= ~2;
3034 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3035 pcm->card, 1);
3036 }
3037 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3038 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3039 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3040 #endif
3041 }
3042 pcm->oss.reg = 0;
3043 }
3044 return 0;
3045 }
3046
3047 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3048 {
3049 snd_pcm_oss_disconnect_minor(pcm);
3050 snd_pcm_oss_proc_done(pcm);
3051 return 0;
3052 }
3053
3054 static struct snd_pcm_notify snd_pcm_oss_notify =
3055 {
3056 .n_register = snd_pcm_oss_register_minor,
3057 .n_disconnect = snd_pcm_oss_disconnect_minor,
3058 .n_unregister = snd_pcm_oss_unregister_minor,
3059 };
3060
3061 static int __init alsa_pcm_oss_init(void)
3062 {
3063 int i;
3064 int err;
3065
3066 /* check device map table */
3067 for (i = 0; i < SNDRV_CARDS; i++) {
3068 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3069 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3070 i, dsp_map[i]);
3071 dsp_map[i] = 0;
3072 }
3073 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3074 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3075 i, adsp_map[i]);
3076 adsp_map[i] = 1;
3077 }
3078 }
3079 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3080 return err;
3081 return 0;
3082 }
3083
3084 static void __exit alsa_pcm_oss_exit(void)
3085 {
3086 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3087 }
3088
3089 module_init(alsa_pcm_oss_init)
3090 module_exit(alsa_pcm_oss_exit)
Tomato firmware and modifications.