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ALSA: allocation may fail in snd_pcm_oss_change_params()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / core / oss / pcm_oss.c
blobd35d61b3292ced461a1aa63f0f755a072324e840
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/moduleparam.h>
34 #include <linux/math64.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44
45 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
47 static int dsp_map[SNDRV_CARDS];
48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49 static int nonblock_open = 1;
50
51 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53 MODULE_LICENSE("GPL");
54 module_param_array(dsp_map, int, NULL, 0444);
55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56 module_param_array(adsp_map, int, NULL, 0444);
57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58 module_param(nonblock_open, bool, 0644);
59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
63 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 /*
81 * helper functions to process hw_params
82 */
83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84 {
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105 }
106
107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108 {
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129 }
130
131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132 {
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139 }
140
141 /**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149 static unsigned int
150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152 {
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165 }
166
167 /**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175 static unsigned int
176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178 {
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191 }
192
193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196 {
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204 }
205
206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210 {
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220 }
221
222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225 {
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251 }
252
253 /**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269 {
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279 }
280
281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284 {
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312 }
313
314 /**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330 {
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340 }
341
342 static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345 {
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356 }
357
358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360 {
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372 }
373
374 /* Return 1 if min is nearer to best than max */
375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378 {
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384 }
385
386 /**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404 {
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 if (max < 0)
457 return max;
458 last = 1;
459 }
460 _end:
461 kfree(save);
462 if (last)
463 v = snd_pcm_hw_param_last(pcm, params, var, dir);
464 else
465 v = snd_pcm_hw_param_first(pcm, params, var, dir);
466 snd_BUG_ON(v < 0);
467 return v;
468 }
469
470 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
471 snd_pcm_hw_param_t var, unsigned int val,
472 int dir)
473 {
474 int changed;
475 if (hw_is_mask(var)) {
476 struct snd_mask *m = hw_param_mask(params, var);
477 if (val == 0 && dir < 0) {
478 changed = -EINVAL;
479 snd_mask_none(m);
480 } else {
481 if (dir > 0)
482 val++;
483 else if (dir < 0)
484 val--;
485 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
486 }
487 } else if (hw_is_interval(var)) {
488 struct snd_interval *i = hw_param_interval(params, var);
489 if (val == 0 && dir < 0) {
490 changed = -EINVAL;
491 snd_interval_none(i);
492 } else if (dir == 0)
493 changed = snd_interval_refine_set(i, val);
494 else {
495 struct snd_interval t;
496 t.openmin = 1;
497 t.openmax = 1;
498 t.empty = 0;
499 t.integer = 0;
500 if (dir < 0) {
501 t.min = val - 1;
502 t.max = val;
503 } else {
504 t.min = val;
505 t.max = val+1;
506 }
507 changed = snd_interval_refine(i, &t);
508 }
509 } else
510 return -EINVAL;
511 if (changed) {
512 params->cmask |= 1 << var;
513 params->rmask |= 1 << var;
514 }
515 return changed;
516 }
517
518 /**
519 * snd_pcm_hw_param_set
520 * @pcm: PCM instance
521 * @params: the hw_params instance
522 * @var: parameter to retrieve
523 * @val: value to set
524 * @dir: pointer to the direction (-1,0,1) or NULL
525 *
526 * Inside configuration space defined by PARAMS remove from PAR all
527 * values != VAL. Reduce configuration space accordingly.
528 * Return VAL or -EINVAL if the configuration space is empty
529 */
530 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
531 struct snd_pcm_hw_params *params,
532 snd_pcm_hw_param_t var, unsigned int val,
533 int dir)
534 {
535 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
536 if (changed < 0)
537 return changed;
538 if (params->rmask) {
539 int err = snd_pcm_hw_refine(pcm, params);
540 if (err < 0)
541 return err;
542 }
543 return snd_pcm_hw_param_value(params, var, NULL);
544 }
545
546 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
547 snd_pcm_hw_param_t var)
548 {
549 int changed;
550 changed = snd_interval_setinteger(hw_param_interval(params, var));
551 if (changed) {
552 params->cmask |= 1 << var;
553 params->rmask |= 1 << var;
554 }
555 return changed;
556 }
557
558 /*
559 * plugin
560 */
561
562 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
563 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
564 {
565 struct snd_pcm_runtime *runtime = substream->runtime;
566 struct snd_pcm_plugin *plugin, *next;
567
568 plugin = runtime->oss.plugin_first;
569 while (plugin) {
570 next = plugin->next;
571 snd_pcm_plugin_free(plugin);
572 plugin = next;
573 }
574 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
575 return 0;
576 }
577
578 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
579 {
580 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
581 plugin->next = runtime->oss.plugin_first;
582 plugin->prev = NULL;
583 if (runtime->oss.plugin_first) {
584 runtime->oss.plugin_first->prev = plugin;
585 runtime->oss.plugin_first = plugin;
586 } else {
587 runtime->oss.plugin_last =
588 runtime->oss.plugin_first = plugin;
589 }
590 return 0;
591 }
592
593 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
594 {
595 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
596 plugin->next = NULL;
597 plugin->prev = runtime->oss.plugin_last;
598 if (runtime->oss.plugin_last) {
599 runtime->oss.plugin_last->next = plugin;
600 runtime->oss.plugin_last = plugin;
601 } else {
602 runtime->oss.plugin_last =
603 runtime->oss.plugin_first = plugin;
604 }
605 return 0;
606 }
607 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
608
609 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
610 {
611 struct snd_pcm_runtime *runtime = substream->runtime;
612 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
613 long bytes = frames_to_bytes(runtime, frames);
614 if (buffer_size == runtime->oss.buffer_bytes)
615 return bytes;
616 #if BITS_PER_LONG >= 64
617 return runtime->oss.buffer_bytes * bytes / buffer_size;
618 #else
619 {
620 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
621 return div_u64(bsize, buffer_size);
622 }
623 #endif
624 }
625
626 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
627 {
628 struct snd_pcm_runtime *runtime = substream->runtime;
629 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
630 if (buffer_size == runtime->oss.buffer_bytes)
631 return bytes_to_frames(runtime, bytes);
632 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
633 }
634
635 /* define extended formats in the recent OSS versions (if any) */
636 /* linear formats */
637 #define AFMT_S32_LE 0x00001000
638 #define AFMT_S32_BE 0x00002000
639 #define AFMT_S24_LE 0x00008000
640 #define AFMT_S24_BE 0x00010000
641 #define AFMT_S24_PACKED 0x00040000
642
643 /* other supported formats */
644 #define AFMT_FLOAT 0x00004000
645 #define AFMT_SPDIF_RAW 0x00020000
646
647 /* unsupported formats */
648 #define AFMT_AC3 0x00000400
649 #define AFMT_VORBIS 0x00000800
650
651 static int snd_pcm_oss_format_from(int format)
652 {
653 switch (format) {
654 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
655 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
656 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
657 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
658 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
659 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
660 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
661 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
662 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
663 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
664 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
665 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
666 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
667 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
668 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
669 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
670 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
671 default: return SNDRV_PCM_FORMAT_U8;
672 }
673 }
674
675 static int snd_pcm_oss_format_to(int format)
676 {
677 switch (format) {
678 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
679 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
680 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
681 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
682 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
683 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
684 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
685 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
686 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
687 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
688 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
689 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
690 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
691 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
692 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
693 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
694 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
695 default: return -EINVAL;
696 }
697 }
698
699 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
700 struct snd_pcm_hw_params *oss_params,
701 struct snd_pcm_hw_params *slave_params)
702 {
703 size_t s;
704 size_t oss_buffer_size, oss_period_size, oss_periods;
705 size_t min_period_size, max_period_size;
706 struct snd_pcm_runtime *runtime = substream->runtime;
707 size_t oss_frame_size;
708
709 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
710 params_channels(oss_params) / 8;
711
712 oss_buffer_size = snd_pcm_plug_client_size(substream,
713 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
714 oss_buffer_size = 1 << ld2(oss_buffer_size);
715 if (atomic_read(&substream->mmap_count)) {
716 if (oss_buffer_size > runtime->oss.mmap_bytes)
717 oss_buffer_size = runtime->oss.mmap_bytes;
718 }
719
720 if (substream->oss.setup.period_size > 16)
721 oss_period_size = substream->oss.setup.period_size;
722 else if (runtime->oss.fragshift) {
723 oss_period_size = 1 << runtime->oss.fragshift;
724 if (oss_period_size > oss_buffer_size / 2)
725 oss_period_size = oss_buffer_size / 2;
726 } else {
727 int sd;
728 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
729
730 oss_period_size = oss_buffer_size;
731 do {
732 oss_period_size /= 2;
733 } while (oss_period_size > bytes_per_sec);
734 if (runtime->oss.subdivision == 0) {
735 sd = 4;
736 if (oss_period_size / sd > 4096)
737 sd *= 2;
738 if (oss_period_size / sd < 4096)
739 sd = 1;
740 } else
741 sd = runtime->oss.subdivision;
742 oss_period_size /= sd;
743 if (oss_period_size < 16)
744 oss_period_size = 16;
745 }
746
747 min_period_size = snd_pcm_plug_client_size(substream,
748 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
749 min_period_size *= oss_frame_size;
750 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
751 if (oss_period_size < min_period_size)
752 oss_period_size = min_period_size;
753
754 max_period_size = snd_pcm_plug_client_size(substream,
755 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
756 max_period_size *= oss_frame_size;
757 max_period_size = 1 << ld2(max_period_size);
758 if (oss_period_size > max_period_size)
759 oss_period_size = max_period_size;
760
761 oss_periods = oss_buffer_size / oss_period_size;
762
763 if (substream->oss.setup.periods > 1)
764 oss_periods = substream->oss.setup.periods;
765
766 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
767 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
768 s = runtime->oss.maxfrags;
769 if (oss_periods > s)
770 oss_periods = s;
771
772 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
773 if (s < 2)
774 s = 2;
775 if (oss_periods < s)
776 oss_periods = s;
777
778 while (oss_period_size * oss_periods > oss_buffer_size)
779 oss_period_size /= 2;
780
781 if (oss_period_size < 16)
782 return -EINVAL;
783 runtime->oss.period_bytes = oss_period_size;
784 runtime->oss.period_frames = 1;
785 runtime->oss.periods = oss_periods;
786 return 0;
787 }
788
789 static int choose_rate(struct snd_pcm_substream *substream,
790 struct snd_pcm_hw_params *params, unsigned int best_rate)
791 {
792 struct snd_interval *it;
793 struct snd_pcm_hw_params *save;
794 unsigned int rate, prev;
795
796 save = kmalloc(sizeof(*save), GFP_KERNEL);
797 if (save == NULL)
798 return -ENOMEM;
799 *save = *params;
800 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
801
802 /* try multiples of the best rate */
803 rate = best_rate;
804 for (;;) {
805 if (it->max < rate || (it->max == rate && it->openmax))
806 break;
807 if (it->min < rate || (it->min == rate && !it->openmin)) {
808 int ret;
809 ret = snd_pcm_hw_param_set(substream, params,
810 SNDRV_PCM_HW_PARAM_RATE,
811 rate, 0);
812 if (ret == (int)rate) {
813 kfree(save);
814 return rate;
815 }
816 *params = *save;
817 }
818 prev = rate;
819 rate += best_rate;
820 if (rate <= prev)
821 break;
822 }
823
824 /* not found, use the nearest rate */
825 kfree(save);
826 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
827 }
828
829 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
830 {
831 struct snd_pcm_runtime *runtime = substream->runtime;
832 struct snd_pcm_hw_params *params, *sparams;
833 struct snd_pcm_sw_params *sw_params;
834 ssize_t oss_buffer_size, oss_period_size;
835 size_t oss_frame_size;
836 int err;
837 int direct;
838 int format, sformat, n;
839 struct snd_mask sformat_mask;
840 struct snd_mask mask;
841
842 if (mutex_lock_interruptible(&runtime->oss.params_lock))
843 return -EINTR;
844 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
845 params = kmalloc(sizeof(*params), GFP_KERNEL);
846 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
847 if (!sw_params || !params || !sparams) {
848 snd_printd("No memory\n");
849 err = -ENOMEM;
850 goto failure;
851 }
852
853 if (atomic_read(&substream->mmap_count))
854 direct = 1;
855 else
856 direct = substream->oss.setup.direct;
857
858 _snd_pcm_hw_params_any(sparams);
859 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
860 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
861 snd_mask_none(&mask);
862 if (atomic_read(&substream->mmap_count))
863 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
864 else {
865 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
866 if (!direct)
867 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
868 }
869 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
870 if (err < 0) {
871 snd_printd("No usable accesses\n");
872 err = -EINVAL;
873 goto failure;
874 }
875 choose_rate(substream, sparams, runtime->oss.rate);
876 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
877
878 format = snd_pcm_oss_format_from(runtime->oss.format);
879
880 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
881 if (direct)
882 sformat = format;
883 else
884 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
885
886 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
887 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
888 if (snd_mask_test(&sformat_mask, sformat) &&
889 snd_pcm_oss_format_to(sformat) >= 0)
890 break;
891 }
892 if (sformat > SNDRV_PCM_FORMAT_LAST) {
893 snd_printd("Cannot find a format!!!\n");
894 err = -EINVAL;
895 goto failure;
896 }
897 }
898 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
899 if (err < 0)
900 goto failure;
901
902 if (direct) {
903 memcpy(params, sparams, sizeof(*params));
904 } else {
905 _snd_pcm_hw_params_any(params);
906 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
907 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
908 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
909 snd_pcm_oss_format_from(runtime->oss.format), 0);
910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
911 runtime->oss.channels, 0);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
913 runtime->oss.rate, 0);
914 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
915 params_access(params), params_format(params),
916 params_channels(params), params_rate(params));
917 }
918 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
919 params_access(sparams), params_format(sparams),
920 params_channels(sparams), params_rate(sparams));
921
922 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
923 params_channels(params) / 8;
924
925 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
926 snd_pcm_oss_plugin_clear(substream);
927 if (!direct) {
928 /* add necessary plugins */
929 snd_pcm_oss_plugin_clear(substream);
930 if ((err = snd_pcm_plug_format_plugins(substream,
931 params,
932 sparams)) < 0) {
933 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
934 snd_pcm_oss_plugin_clear(substream);
935 goto failure;
936 }
937 if (runtime->oss.plugin_first) {
938 struct snd_pcm_plugin *plugin;
939 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
940 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
941 snd_pcm_oss_plugin_clear(substream);
942 goto failure;
943 }
944 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
945 err = snd_pcm_plugin_append(plugin);
946 } else {
947 err = snd_pcm_plugin_insert(plugin);
948 }
949 if (err < 0) {
950 snd_pcm_oss_plugin_clear(substream);
951 goto failure;
952 }
953 }
954 }
955 #endif
956
957 err = snd_pcm_oss_period_size(substream, params, sparams);
958 if (err < 0)
959 goto failure;
960
961 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
962 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
963 if (err < 0)
964 goto failure;
965
966 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
967 runtime->oss.periods, NULL);
968 if (err < 0)
969 goto failure;
970
971 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
972
973 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
974 snd_printd("HW_PARAMS failed: %i\n", err);
975 goto failure;
976 }
977
978 memset(sw_params, 0, sizeof(*sw_params));
979 if (runtime->oss.trigger) {
980 sw_params->start_threshold = 1;
981 } else {
982 sw_params->start_threshold = runtime->boundary;
983 }
984 if (atomic_read(&substream->mmap_count) ||
985 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
986 sw_params->stop_threshold = runtime->boundary;
987 else
988 sw_params->stop_threshold = runtime->buffer_size;
989 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
990 sw_params->period_step = 1;
991 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
992 1 : runtime->period_size;
993 if (atomic_read(&substream->mmap_count) ||
994 substream->oss.setup.nosilence) {
995 sw_params->silence_threshold = 0;
996 sw_params->silence_size = 0;
997 } else {
998 snd_pcm_uframes_t frames;
999 frames = runtime->period_size + 16;
1000 if (frames > runtime->buffer_size)
1001 frames = runtime->buffer_size;
1002 sw_params->silence_threshold = frames;
1003 sw_params->silence_size = frames;
1004 }
1005
1006 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1007 snd_printd("SW_PARAMS failed: %i\n", err);
1008 goto failure;
1009 }
1010
1011 runtime->oss.periods = params_periods(sparams);
1012 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1013 if (oss_period_size < 0) {
1014 err = -EINVAL;
1015 goto failure;
1016 }
1017 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1018 if (runtime->oss.plugin_first) {
1019 err = snd_pcm_plug_alloc(substream, oss_period_size);
1020 if (err < 0)
1021 goto failure;
1022 }
1023 #endif
1024 oss_period_size *= oss_frame_size;
1025
1026 oss_buffer_size = oss_period_size * runtime->oss.periods;
1027 if (oss_buffer_size < 0) {
1028 err = -EINVAL;
1029 goto failure;
1030 }
1031
1032 runtime->oss.period_bytes = oss_period_size;
1033 runtime->oss.buffer_bytes = oss_buffer_size;
1034
1035 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1036 runtime->oss.period_bytes,
1037 runtime->oss.buffer_bytes);
1038 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1039 params_period_size(sparams),
1040 params_buffer_size(sparams));
1041
1042 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1043 runtime->oss.channels = params_channels(params);
1044 runtime->oss.rate = params_rate(params);
1045
1046 vfree(runtime->oss.buffer);
1047 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1048 if (!runtime->oss.buffer) {
1049 err = -ENOMEM;
1050 goto failure;
1051 }
1052
1053 runtime->oss.params = 0;
1054 runtime->oss.prepare = 1;
1055 runtime->oss.buffer_used = 0;
1056 if (runtime->dma_area)
1057 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1058
1059 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1060
1061 err = 0;
1062 failure:
1063 kfree(sw_params);
1064 kfree(params);
1065 kfree(sparams);
1066 mutex_unlock(&runtime->oss.params_lock);
1067 return err;
1068 }
1069
1070 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1071 {
1072 int idx, err;
1073 struct snd_pcm_substream *asubstream = NULL, *substream;
1074
1075 for (idx = 0; idx < 2; idx++) {
1076 substream = pcm_oss_file->streams[idx];
1077 if (substream == NULL)
1078 continue;
1079 if (asubstream == NULL)
1080 asubstream = substream;
1081 if (substream->runtime->oss.params) {
1082 err = snd_pcm_oss_change_params(substream);
1083 if (err < 0)
1084 return err;
1085 }
1086 }
1087 if (!asubstream)
1088 return -EIO;
1089 if (r_substream)
1090 *r_substream = asubstream;
1091 return 0;
1092 }
1093
1094 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1095 {
1096 int err;
1097 struct snd_pcm_runtime *runtime = substream->runtime;
1098
1099 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1100 if (err < 0) {
1101 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1102 return err;
1103 }
1104 runtime->oss.prepare = 0;
1105 runtime->oss.prev_hw_ptr_interrupt = 0;
1106 runtime->oss.period_ptr = 0;
1107 runtime->oss.buffer_used = 0;
1108
1109 return 0;
1110 }
1111
1112 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1113 {
1114 struct snd_pcm_runtime *runtime;
1115 int err;
1116
1117 if (substream == NULL)
1118 return 0;
1119 runtime = substream->runtime;
1120 if (runtime->oss.params) {
1121 err = snd_pcm_oss_change_params(substream);
1122 if (err < 0)
1123 return err;
1124 }
1125 if (runtime->oss.prepare) {
1126 err = snd_pcm_oss_prepare(substream);
1127 if (err < 0)
1128 return err;
1129 }
1130 return 0;
1131 }
1132
1133 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1134 {
1135 struct snd_pcm_runtime *runtime;
1136 snd_pcm_uframes_t frames;
1137 int err = 0;
1138
1139 while (1) {
1140 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1141 if (err < 0)
1142 break;
1143 runtime = substream->runtime;
1144 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1145 break;
1146 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1147 /* until avail(delay) <= buffer_size */
1148 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1149 frames /= runtime->period_size;
1150 frames *= runtime->period_size;
1151 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1152 if (err < 0)
1153 break;
1154 }
1155 return err;
1156 }
1157
1158 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1159 {
1160 struct snd_pcm_runtime *runtime = substream->runtime;
1161 int ret;
1162 while (1) {
1163 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1164 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1165 #ifdef OSS_DEBUG
1166 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1167 printk(KERN_DEBUG "pcm_oss: write: "
1168 "recovering from XRUN\n");
1169 else
1170 printk(KERN_DEBUG "pcm_oss: write: "
1171 "recovering from SUSPEND\n");
1172 #endif
1173 ret = snd_pcm_oss_prepare(substream);
1174 if (ret < 0)
1175 break;
1176 }
1177 if (in_kernel) {
1178 mm_segment_t fs;
1179 fs = snd_enter_user();
1180 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1181 snd_leave_user(fs);
1182 } else {
1183 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1184 }
1185 if (ret != -EPIPE && ret != -ESTRPIPE)
1186 break;
1187 /* test, if we can't store new data, because the stream */
1188 /* has not been started */
1189 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1190 return -EAGAIN;
1191 }
1192 return ret;
1193 }
1194
1195 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1196 {
1197 struct snd_pcm_runtime *runtime = substream->runtime;
1198 snd_pcm_sframes_t delay;
1199 int ret;
1200 while (1) {
1201 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1202 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1203 #ifdef OSS_DEBUG
1204 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1205 printk(KERN_DEBUG "pcm_oss: read: "
1206 "recovering from XRUN\n");
1207 else
1208 printk(KERN_DEBUG "pcm_oss: read: "
1209 "recovering from SUSPEND\n");
1210 #endif
1211 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1212 if (ret < 0)
1213 break;
1214 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1215 ret = snd_pcm_oss_prepare(substream);
1216 if (ret < 0)
1217 break;
1218 }
1219 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1220 if (ret < 0)
1221 break;
1222 if (in_kernel) {
1223 mm_segment_t fs;
1224 fs = snd_enter_user();
1225 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1226 snd_leave_user(fs);
1227 } else {
1228 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1229 }
1230 if (ret == -EPIPE) {
1231 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1232 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1233 if (ret < 0)
1234 break;
1235 }
1236 continue;
1237 }
1238 if (ret != -ESTRPIPE)
1239 break;
1240 }
1241 return ret;
1242 }
1243
1244 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1245 {
1246 struct snd_pcm_runtime *runtime = substream->runtime;
1247 int ret;
1248 while (1) {
1249 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1250 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1251 #ifdef OSS_DEBUG
1252 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1253 printk(KERN_DEBUG "pcm_oss: writev: "
1254 "recovering from XRUN\n");
1255 else
1256 printk(KERN_DEBUG "pcm_oss: writev: "
1257 "recovering from SUSPEND\n");
1258 #endif
1259 ret = snd_pcm_oss_prepare(substream);
1260 if (ret < 0)
1261 break;
1262 }
1263 if (in_kernel) {
1264 mm_segment_t fs;
1265 fs = snd_enter_user();
1266 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1267 snd_leave_user(fs);
1268 } else {
1269 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1270 }
1271 if (ret != -EPIPE && ret != -ESTRPIPE)
1272 break;
1273
1274 /* test, if we can't store new data, because the stream */
1275 /* has not been started */
1276 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1277 return -EAGAIN;
1278 }
1279 return ret;
1280 }
1281
1282 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1283 {
1284 struct snd_pcm_runtime *runtime = substream->runtime;
1285 int ret;
1286 while (1) {
1287 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1288 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1289 #ifdef OSS_DEBUG
1290 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1291 printk(KERN_DEBUG "pcm_oss: readv: "
1292 "recovering from XRUN\n");
1293 else
1294 printk(KERN_DEBUG "pcm_oss: readv: "
1295 "recovering from SUSPEND\n");
1296 #endif
1297 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1298 if (ret < 0)
1299 break;
1300 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1301 ret = snd_pcm_oss_prepare(substream);
1302 if (ret < 0)
1303 break;
1304 }
1305 if (in_kernel) {
1306 mm_segment_t fs;
1307 fs = snd_enter_user();
1308 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1309 snd_leave_user(fs);
1310 } else {
1311 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1312 }
1313 if (ret != -EPIPE && ret != -ESTRPIPE)
1314 break;
1315 }
1316 return ret;
1317 }
1318
1319 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1320 {
1321 struct snd_pcm_runtime *runtime = substream->runtime;
1322 snd_pcm_sframes_t frames, frames1;
1323 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1324 if (runtime->oss.plugin_first) {
1325 struct snd_pcm_plugin_channel *channels;
1326 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1327 if (!in_kernel) {
1328 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1329 return -EFAULT;
1330 buf = runtime->oss.buffer;
1331 }
1332 frames = bytes / oss_frame_bytes;
1333 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1334 if (frames1 < 0)
1335 return frames1;
1336 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1337 if (frames1 <= 0)
1338 return frames1;
1339 bytes = frames1 * oss_frame_bytes;
1340 } else
1341 #endif
1342 {
1343 frames = bytes_to_frames(runtime, bytes);
1344 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1345 if (frames1 <= 0)
1346 return frames1;
1347 bytes = frames_to_bytes(runtime, frames1);
1348 }
1349 return bytes;
1350 }
1351
1352 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1353 {
1354 size_t xfer = 0;
1355 ssize_t tmp;
1356 struct snd_pcm_runtime *runtime = substream->runtime;
1357
1358 if (atomic_read(&substream->mmap_count))
1359 return -ENXIO;
1360
1361 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1362 return tmp;
1363 mutex_lock(&runtime->oss.params_lock);
1364 while (bytes > 0) {
1365 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1366 tmp = bytes;
1367 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1368 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1369 if (tmp > 0) {
1370 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1371 tmp = -EFAULT;
1372 goto err;
1373 }
1374 }
1375 runtime->oss.buffer_used += tmp;
1376 buf += tmp;
1377 bytes -= tmp;
1378 xfer += tmp;
1379 if (substream->oss.setup.partialfrag ||
1380 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1381 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1382 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1383 if (tmp <= 0)
1384 goto err;
1385 runtime->oss.bytes += tmp;
1386 runtime->oss.period_ptr += tmp;
1387 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1388 if (runtime->oss.period_ptr == 0 ||
1389 runtime->oss.period_ptr == runtime->oss.buffer_used)
1390 runtime->oss.buffer_used = 0;
1391 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1392 tmp = -EAGAIN;
1393 goto err;
1394 }
1395 }
1396 } else {
1397 tmp = snd_pcm_oss_write2(substream,
1398 (const char __force *)buf,
1399 runtime->oss.period_bytes, 0);
1400 if (tmp <= 0)
1401 goto err;
1402 runtime->oss.bytes += tmp;
1403 buf += tmp;
1404 bytes -= tmp;
1405 xfer += tmp;
1406 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1407 tmp != runtime->oss.period_bytes)
1408 break;
1409 }
1410 }
1411 mutex_unlock(&runtime->oss.params_lock);
1412 return xfer;
1413
1414 err:
1415 mutex_unlock(&runtime->oss.params_lock);
1416 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1417 }
1418
1419 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1420 {
1421 struct snd_pcm_runtime *runtime = substream->runtime;
1422 snd_pcm_sframes_t frames, frames1;
1423 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1424 char __user *final_dst = (char __user *)buf;
1425 if (runtime->oss.plugin_first) {
1426 struct snd_pcm_plugin_channel *channels;
1427 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1428 if (!in_kernel)
1429 buf = runtime->oss.buffer;
1430 frames = bytes / oss_frame_bytes;
1431 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1432 if (frames1 < 0)
1433 return frames1;
1434 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1435 if (frames1 <= 0)
1436 return frames1;
1437 bytes = frames1 * oss_frame_bytes;
1438 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1439 return -EFAULT;
1440 } else
1441 #endif
1442 {
1443 frames = bytes_to_frames(runtime, bytes);
1444 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1445 if (frames1 <= 0)
1446 return frames1;
1447 bytes = frames_to_bytes(runtime, frames1);
1448 }
1449 return bytes;
1450 }
1451
1452 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1453 {
1454 size_t xfer = 0;
1455 ssize_t tmp;
1456 struct snd_pcm_runtime *runtime = substream->runtime;
1457
1458 if (atomic_read(&substream->mmap_count))
1459 return -ENXIO;
1460
1461 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1462 return tmp;
1463 mutex_lock(&runtime->oss.params_lock);
1464 while (bytes > 0) {
1465 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1466 if (runtime->oss.buffer_used == 0) {
1467 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1468 if (tmp <= 0)
1469 goto err;
1470 runtime->oss.bytes += tmp;
1471 runtime->oss.period_ptr = tmp;
1472 runtime->oss.buffer_used = tmp;
1473 }
1474 tmp = bytes;
1475 if ((size_t) tmp > runtime->oss.buffer_used)
1476 tmp = runtime->oss.buffer_used;
1477 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1478 tmp = -EFAULT;
1479 goto err;
1480 }
1481 buf += tmp;
1482 bytes -= tmp;
1483 xfer += tmp;
1484 runtime->oss.buffer_used -= tmp;
1485 } else {
1486 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1487 runtime->oss.period_bytes, 0);
1488 if (tmp <= 0)
1489 goto err;
1490 runtime->oss.bytes += tmp;
1491 buf += tmp;
1492 bytes -= tmp;
1493 xfer += tmp;
1494 }
1495 }
1496 mutex_unlock(&runtime->oss.params_lock);
1497 return xfer;
1498
1499 err:
1500 mutex_unlock(&runtime->oss.params_lock);
1501 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1502 }
1503
1504 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1505 {
1506 struct snd_pcm_substream *substream;
1507
1508 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1509 if (substream != NULL) {
1510 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1511 substream->runtime->oss.prepare = 1;
1512 }
1513 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1514 if (substream != NULL) {
1515 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1516 substream->runtime->oss.prepare = 1;
1517 }
1518 return 0;
1519 }
1520
1521 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1522 {
1523 struct snd_pcm_substream *substream;
1524 int err;
1525
1526 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1527 if (substream != NULL) {
1528 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1529 return err;
1530 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1531 }
1532 /* note: all errors from the start action are ignored */
1533 /* OSS apps do not know, how to handle them */
1534 return 0;
1535 }
1536
1537 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1538 {
1539 struct snd_pcm_runtime *runtime;
1540 ssize_t result = 0;
1541 long res;
1542 wait_queue_t wait;
1543
1544 runtime = substream->runtime;
1545 init_waitqueue_entry(&wait, current);
1546 add_wait_queue(&runtime->sleep, &wait);
1547 #ifdef OSS_DEBUG
1548 printk(KERN_DEBUG "sync1: size = %li\n", size);
1549 #endif
1550 while (1) {
1551 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1552 if (result > 0) {
1553 runtime->oss.buffer_used = 0;
1554 result = 0;
1555 break;
1556 }
1557 if (result != 0 && result != -EAGAIN)
1558 break;
1559 result = 0;
1560 set_current_state(TASK_INTERRUPTIBLE);
1561 snd_pcm_stream_lock_irq(substream);
1562 res = runtime->status->state;
1563 snd_pcm_stream_unlock_irq(substream);
1564 if (res != SNDRV_PCM_STATE_RUNNING) {
1565 set_current_state(TASK_RUNNING);
1566 break;
1567 }
1568 res = schedule_timeout(10 * HZ);
1569 if (signal_pending(current)) {
1570 result = -ERESTARTSYS;
1571 break;
1572 }
1573 if (res == 0) {
1574 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1575 result = -EIO;
1576 break;
1577 }
1578 }
1579 remove_wait_queue(&runtime->sleep, &wait);
1580 return result;
1581 }
1582
1583 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1584 {
1585 int err = 0;
1586 unsigned int saved_f_flags;
1587 struct snd_pcm_substream *substream;
1588 struct snd_pcm_runtime *runtime;
1589 snd_pcm_format_t format;
1590 unsigned long width;
1591 size_t size;
1592
1593 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1594 if (substream != NULL) {
1595 runtime = substream->runtime;
1596 if (atomic_read(&substream->mmap_count))
1597 goto __direct;
1598 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1599 return err;
1600 format = snd_pcm_oss_format_from(runtime->oss.format);
1601 width = snd_pcm_format_physical_width(format);
1602 mutex_lock(&runtime->oss.params_lock);
1603 if (runtime->oss.buffer_used > 0) {
1604 #ifdef OSS_DEBUG
1605 printk(KERN_DEBUG "sync: buffer_used\n");
1606 #endif
1607 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1608 snd_pcm_format_set_silence(format,
1609 runtime->oss.buffer + runtime->oss.buffer_used,
1610 size);
1611 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1612 if (err < 0) {
1613 mutex_unlock(&runtime->oss.params_lock);
1614 return err;
1615 }
1616 } else if (runtime->oss.period_ptr > 0) {
1617 #ifdef OSS_DEBUG
1618 printk(KERN_DEBUG "sync: period_ptr\n");
1619 #endif
1620 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1621 snd_pcm_format_set_silence(format,
1622 runtime->oss.buffer,
1623 size * 8 / width);
1624 err = snd_pcm_oss_sync1(substream, size);
1625 if (err < 0) {
1626 mutex_unlock(&runtime->oss.params_lock);
1627 return err;
1628 }
1629 }
1630 /*
1631 * The ALSA's period might be a bit large than OSS one.
1632 * Fill the remain portion of ALSA period with zeros.
1633 */
1634 size = runtime->control->appl_ptr % runtime->period_size;
1635 if (size > 0) {
1636 size = runtime->period_size - size;
1637 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1638 size = (runtime->frame_bits * size) / 8;
1639 while (size > 0) {
1640 mm_segment_t fs;
1641 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1642 size -= size1;
1643 size1 *= 8;
1644 size1 /= runtime->sample_bits;
1645 snd_pcm_format_set_silence(runtime->format,
1646 runtime->oss.buffer,
1647 size1);
1648 size1 /= runtime->channels; /* frames */
1649 fs = snd_enter_user();
1650 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1651 snd_leave_user(fs);
1652 }
1653 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1654 void __user *buffers[runtime->channels];
1655 memset(buffers, 0, runtime->channels * sizeof(void *));
1656 snd_pcm_lib_writev(substream, buffers, size);
1657 }
1658 }
1659 mutex_unlock(&runtime->oss.params_lock);
1660 /*
1661 * finish sync: drain the buffer
1662 */
1663 __direct:
1664 saved_f_flags = substream->f_flags;
1665 substream->f_flags &= ~O_NONBLOCK;
1666 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1667 substream->f_flags = saved_f_flags;
1668 if (err < 0)
1669 return err;
1670 runtime->oss.prepare = 1;
1671 }
1672
1673 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1674 if (substream != NULL) {
1675 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1676 return err;
1677 runtime = substream->runtime;
1678 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1679 if (err < 0)
1680 return err;
1681 runtime->oss.buffer_used = 0;
1682 runtime->oss.prepare = 1;
1683 }
1684 return 0;
1685 }
1686
1687 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1688 {
1689 int idx;
1690
1691 for (idx = 1; idx >= 0; --idx) {
1692 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1693 struct snd_pcm_runtime *runtime;
1694 if (substream == NULL)
1695 continue;
1696 runtime = substream->runtime;
1697 if (rate < 1000)
1698 rate = 1000;
1699 else if (rate > 192000)
1700 rate = 192000;
1701 if (runtime->oss.rate != rate) {
1702 runtime->oss.params = 1;
1703 runtime->oss.rate = rate;
1704 }
1705 }
1706 return snd_pcm_oss_get_rate(pcm_oss_file);
1707 }
1708
1709 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1710 {
1711 struct snd_pcm_substream *substream;
1712 int err;
1713
1714 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1715 return err;
1716 return substream->runtime->oss.rate;
1717 }
1718
1719 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1720 {
1721 int idx;
1722 if (channels < 1)
1723 channels = 1;
1724 if (channels > 128)
1725 return -EINVAL;
1726 for (idx = 1; idx >= 0; --idx) {
1727 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1728 struct snd_pcm_runtime *runtime;
1729 if (substream == NULL)
1730 continue;
1731 runtime = substream->runtime;
1732 if (runtime->oss.channels != channels) {
1733 runtime->oss.params = 1;
1734 runtime->oss.channels = channels;
1735 }
1736 }
1737 return snd_pcm_oss_get_channels(pcm_oss_file);
1738 }
1739
1740 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1741 {
1742 struct snd_pcm_substream *substream;
1743 int err;
1744
1745 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1746 return err;
1747 return substream->runtime->oss.channels;
1748 }
1749
1750 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1751 {
1752 struct snd_pcm_substream *substream;
1753 int err;
1754
1755 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1756 return err;
1757 return substream->runtime->oss.period_bytes;
1758 }
1759
1760 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1761 {
1762 struct snd_pcm_substream *substream;
1763 int err;
1764 int direct;
1765 struct snd_pcm_hw_params *params;
1766 unsigned int formats = 0;
1767 struct snd_mask format_mask;
1768 int fmt;
1769
1770 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1771 return err;
1772 if (atomic_read(&substream->mmap_count))
1773 direct = 1;
1774 else
1775 direct = substream->oss.setup.direct;
1776 if (!direct)
1777 return AFMT_MU_LAW | AFMT_U8 |
1778 AFMT_S16_LE | AFMT_S16_BE |
1779 AFMT_S8 | AFMT_U16_LE |
1780 AFMT_U16_BE |
1781 AFMT_S32_LE | AFMT_S32_BE |
1782 AFMT_S24_LE | AFMT_S24_BE |
1783 AFMT_S24_PACKED;
1784 params = kmalloc(sizeof(*params), GFP_KERNEL);
1785 if (!params)
1786 return -ENOMEM;
1787 _snd_pcm_hw_params_any(params);
1788 err = snd_pcm_hw_refine(substream, params);
1789 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1790 kfree(params);
1791 if (err < 0)
1792 return err;
1793 for (fmt = 0; fmt < 32; ++fmt) {
1794 if (snd_mask_test(&format_mask, fmt)) {
1795 int f = snd_pcm_oss_format_to(fmt);
1796 if (f >= 0)
1797 formats |= f;
1798 }
1799 }
1800 return formats;
1801 }
1802
1803 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1804 {
1805 int formats, idx;
1806
1807 if (format != AFMT_QUERY) {
1808 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1809 if (formats < 0)
1810 return formats;
1811 if (!(formats & format))
1812 format = AFMT_U8;
1813 for (idx = 1; idx >= 0; --idx) {
1814 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1815 struct snd_pcm_runtime *runtime;
1816 if (substream == NULL)
1817 continue;
1818 runtime = substream->runtime;
1819 if (runtime->oss.format != format) {
1820 runtime->oss.params = 1;
1821 runtime->oss.format = format;
1822 }
1823 }
1824 }
1825 return snd_pcm_oss_get_format(pcm_oss_file);
1826 }
1827
1828 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1829 {
1830 struct snd_pcm_substream *substream;
1831 int err;
1832
1833 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1834 return err;
1835 return substream->runtime->oss.format;
1836 }
1837
1838 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1839 {
1840 struct snd_pcm_runtime *runtime;
1841
1842 if (substream == NULL)
1843 return 0;
1844 runtime = substream->runtime;
1845 if (subdivide == 0) {
1846 subdivide = runtime->oss.subdivision;
1847 if (subdivide == 0)
1848 subdivide = 1;
1849 return subdivide;
1850 }
1851 if (runtime->oss.subdivision || runtime->oss.fragshift)
1852 return -EINVAL;
1853 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1854 subdivide != 8 && subdivide != 16)
1855 return -EINVAL;
1856 runtime->oss.subdivision = subdivide;
1857 runtime->oss.params = 1;
1858 return subdivide;
1859 }
1860
1861 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1862 {
1863 int err = -EINVAL, idx;
1864
1865 for (idx = 1; idx >= 0; --idx) {
1866 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1867 if (substream == NULL)
1868 continue;
1869 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1870 return err;
1871 }
1872 return err;
1873 }
1874
1875 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1876 {
1877 struct snd_pcm_runtime *runtime;
1878
1879 if (substream == NULL)
1880 return 0;
1881 runtime = substream->runtime;
1882 if (runtime->oss.subdivision || runtime->oss.fragshift)
1883 return -EINVAL;
1884 runtime->oss.fragshift = val & 0xffff;
1885 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1886 if (runtime->oss.fragshift < 4) /* < 16 */
1887 runtime->oss.fragshift = 4;
1888 if (runtime->oss.maxfrags < 2)
1889 runtime->oss.maxfrags = 2;
1890 runtime->oss.params = 1;
1891 return 0;
1892 }
1893
1894 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1895 {
1896 int err = -EINVAL, idx;
1897
1898 for (idx = 1; idx >= 0; --idx) {
1899 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1900 if (substream == NULL)
1901 continue;
1902 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1903 return err;
1904 }
1905 return err;
1906 }
1907
1908 static int snd_pcm_oss_nonblock(struct file * file)
1909 {
1910 spin_lock(&file->f_lock);
1911 file->f_flags |= O_NONBLOCK;
1912 spin_unlock(&file->f_lock);
1913 return 0;
1914 }
1915
1916 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1917 {
1918
1919 if (substream == NULL) {
1920 res &= ~DSP_CAP_DUPLEX;
1921 return res;
1922 }
1923 #ifdef DSP_CAP_MULTI
1924 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1925 if (substream->pstr->substream_count > 1)
1926 res |= DSP_CAP_MULTI;
1927 #endif
1928 /* DSP_CAP_REALTIME is set all times: */
1929 /* all ALSA drivers can return actual pointer in ring buffer */
1930 #if defined(DSP_CAP_REALTIME) && 0
1931 {
1932 struct snd_pcm_runtime *runtime = substream->runtime;
1933 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1934 res &= ~DSP_CAP_REALTIME;
1935 }
1936 #endif
1937 return res;
1938 }
1939
1940 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1941 {
1942 int result, idx;
1943
1944 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1945 for (idx = 0; idx < 2; idx++) {
1946 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1947 result = snd_pcm_oss_get_caps1(substream, result);
1948 }
1949 result |= 0x0001; /* revision - same as SB AWE 64 */
1950 return result;
1951 }
1952
1953 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1954 {
1955 struct snd_pcm_runtime *runtime = substream->runtime;
1956 snd_pcm_uframes_t appl_ptr;
1957 appl_ptr = hw_ptr + runtime->buffer_size;
1958 appl_ptr %= runtime->boundary;
1959 runtime->control->appl_ptr = appl_ptr;
1960 }
1961
1962 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1963 {
1964 struct snd_pcm_runtime *runtime;
1965 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1966 int err, cmd;
1967
1968 #ifdef OSS_DEBUG
1969 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1970 #endif
1971
1972 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1973 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1974
1975 if (psubstream) {
1976 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1977 return err;
1978 }
1979 if (csubstream) {
1980 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1981 return err;
1982 }
1983 if (psubstream) {
1984 runtime = psubstream->runtime;
1985 if (trigger & PCM_ENABLE_OUTPUT) {
1986 if (runtime->oss.trigger)
1987 goto _skip1;
1988 if (atomic_read(&psubstream->mmap_count))
1989 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1990 runtime->oss.trigger = 1;
1991 runtime->start_threshold = 1;
1992 cmd = SNDRV_PCM_IOCTL_START;
1993 } else {
1994 if (!runtime->oss.trigger)
1995 goto _skip1;
1996 runtime->oss.trigger = 0;
1997 runtime->start_threshold = runtime->boundary;
1998 cmd = SNDRV_PCM_IOCTL_DROP;
1999 runtime->oss.prepare = 1;
2000 }
2001 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2002 if (err < 0)
2003 return err;
2004 }
2005 _skip1:
2006 if (csubstream) {
2007 runtime = csubstream->runtime;
2008 if (trigger & PCM_ENABLE_INPUT) {
2009 if (runtime->oss.trigger)
2010 goto _skip2;
2011 runtime->oss.trigger = 1;
2012 runtime->start_threshold = 1;
2013 cmd = SNDRV_PCM_IOCTL_START;
2014 } else {
2015 if (!runtime->oss.trigger)
2016 goto _skip2;
2017 runtime->oss.trigger = 0;
2018 runtime->start_threshold = runtime->boundary;
2019 cmd = SNDRV_PCM_IOCTL_DROP;
2020 runtime->oss.prepare = 1;
2021 }
2022 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2023 if (err < 0)
2024 return err;
2025 }
2026 _skip2:
2027 return 0;
2028 }
2029
2030 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2031 {
2032 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2033 int result = 0;
2034
2035 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2036 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2037 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2038 result |= PCM_ENABLE_OUTPUT;
2039 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2040 result |= PCM_ENABLE_INPUT;
2041 return result;
2042 }
2043
2044 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2045 {
2046 struct snd_pcm_substream *substream;
2047 struct snd_pcm_runtime *runtime;
2048 snd_pcm_sframes_t delay;
2049 int err;
2050
2051 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2052 if (substream == NULL)
2053 return -EINVAL;
2054 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2055 return err;
2056 runtime = substream->runtime;
2057 if (runtime->oss.params || runtime->oss.prepare)
2058 return 0;
2059 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2060 if (err == -EPIPE)
2061 delay = 0; /* hack for broken OSS applications */
2062 else if (err < 0)
2063 return err;
2064 return snd_pcm_oss_bytes(substream, delay);
2065 }
2066
2067 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2068 {
2069 struct snd_pcm_substream *substream;
2070 struct snd_pcm_runtime *runtime;
2071 snd_pcm_sframes_t delay;
2072 int fixup;
2073 struct count_info info;
2074 int err;
2075
2076 if (_info == NULL)
2077 return -EFAULT;
2078 substream = pcm_oss_file->streams[stream];
2079 if (substream == NULL)
2080 return -EINVAL;
2081 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2082 return err;
2083 runtime = substream->runtime;
2084 if (runtime->oss.params || runtime->oss.prepare) {
2085 memset(&info, 0, sizeof(info));
2086 if (copy_to_user(_info, &info, sizeof(info)))
2087 return -EFAULT;
2088 return 0;
2089 }
2090 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2091 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2092 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2093 err = 0;
2094 delay = 0;
2095 fixup = 0;
2096 } else {
2097 fixup = runtime->oss.buffer_used;
2098 }
2099 } else {
2100 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2101 fixup = -runtime->oss.buffer_used;
2102 }
2103 if (err < 0)
2104 return err;
2105 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2106 if (atomic_read(&substream->mmap_count)) {
2107 snd_pcm_sframes_t n;
2108 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
2109 if (n < 0)
2110 n += runtime->boundary;
2111 info.blocks = n / runtime->period_size;
2112 runtime->oss.prev_hw_ptr_interrupt = delay;
2113 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2114 snd_pcm_oss_simulate_fill(substream, delay);
2115 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2116 } else {
2117 delay = snd_pcm_oss_bytes(substream, delay);
2118 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2119 if (substream->oss.setup.buggyptr)
2120 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2121 else
2122 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2123 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2124 } else {
2125 delay += fixup;
2126 info.blocks = delay / runtime->oss.period_bytes;
2127 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2128 }
2129 }
2130 if (copy_to_user(_info, &info, sizeof(info)))
2131 return -EFAULT;
2132 return 0;
2133 }
2134
2135 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2136 {
2137 struct snd_pcm_substream *substream;
2138 struct snd_pcm_runtime *runtime;
2139 snd_pcm_sframes_t avail;
2140 int fixup;
2141 struct audio_buf_info info;
2142 int err;
2143
2144 if (_info == NULL)
2145 return -EFAULT;
2146 substream = pcm_oss_file->streams[stream];
2147 if (substream == NULL)
2148 return -EINVAL;
2149 runtime = substream->runtime;
2150
2151 if (runtime->oss.params &&
2152 (err = snd_pcm_oss_change_params(substream)) < 0)
2153 return err;
2154
2155 info.fragsize = runtime->oss.period_bytes;
2156 info.fragstotal = runtime->periods;
2157 if (runtime->oss.prepare) {
2158 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2159 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2160 info.fragments = runtime->oss.periods;
2161 } else {
2162 info.bytes = 0;
2163 info.fragments = 0;
2164 }
2165 } else {
2166 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2167 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2168 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2169 avail = runtime->buffer_size;
2170 err = 0;
2171 fixup = 0;
2172 } else {
2173 avail = runtime->buffer_size - avail;
2174 fixup = -runtime->oss.buffer_used;
2175 }
2176 } else {
2177 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2178 fixup = runtime->oss.buffer_used;
2179 }
2180 if (err < 0)
2181 return err;
2182 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2183 info.fragments = info.bytes / runtime->oss.period_bytes;
2184 }
2185
2186 #ifdef OSS_DEBUG
2187 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2188 "fragstotal = %i, fragsize = %i\n",
2189 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2190 #endif
2191 if (copy_to_user(_info, &info, sizeof(info)))
2192 return -EFAULT;
2193 return 0;
2194 }
2195
2196 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2197 {
2198 // it won't be probably implemented
2199 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2200 return -EINVAL;
2201 }
2202
2203 static const char *strip_task_path(const char *path)
2204 {
2205 const char *ptr, *ptrl = NULL;
2206 for (ptr = path; *ptr; ptr++) {
2207 if (*ptr == '/')
2208 ptrl = ptr + 1;
2209 }
2210 return ptrl;
2211 }
2212
2213 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2214 const char *task_name,
2215 struct snd_pcm_oss_setup *rsetup)
2216 {
2217 struct snd_pcm_oss_setup *setup;
2218
2219 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2220 do {
2221 for (setup = pcm->streams[stream].oss.setup_list; setup;
2222 setup = setup->next) {
2223 if (!strcmp(setup->task_name, task_name))
2224 goto out;
2225 }
2226 } while ((task_name = strip_task_path(task_name)) != NULL);
2227 out:
2228 if (setup)
2229 *rsetup = *setup;
2230 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2231 }
2232
2233 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2234 {
2235 struct snd_pcm_runtime *runtime;
2236 runtime = substream->runtime;
2237 vfree(runtime->oss.buffer);
2238 runtime->oss.buffer = NULL;
2239 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2240 snd_pcm_oss_plugin_clear(substream);
2241 #endif
2242 substream->oss.oss = 0;
2243 }
2244
2245 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2246 struct snd_pcm_oss_setup *setup,
2247 int minor)
2248 {
2249 struct snd_pcm_runtime *runtime;
2250
2251 substream->oss.oss = 1;
2252 substream->oss.setup = *setup;
2253 if (setup->nonblock)
2254 substream->f_flags |= O_NONBLOCK;
2255 else if (setup->block)
2256 substream->f_flags &= ~O_NONBLOCK;
2257 runtime = substream->runtime;
2258 runtime->oss.params = 1;
2259 runtime->oss.trigger = 1;
2260 runtime->oss.rate = 8000;
2261 mutex_init(&runtime->oss.params_lock);
2262 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2263 case SNDRV_MINOR_OSS_PCM_8:
2264 runtime->oss.format = AFMT_U8;
2265 break;
2266 case SNDRV_MINOR_OSS_PCM_16:
2267 runtime->oss.format = AFMT_S16_LE;
2268 break;
2269 default:
2270 runtime->oss.format = AFMT_MU_LAW;
2271 }
2272 runtime->oss.channels = 1;
2273 runtime->oss.fragshift = 0;
2274 runtime->oss.maxfrags = 0;
2275 runtime->oss.subdivision = 0;
2276 substream->pcm_release = snd_pcm_oss_release_substream;
2277 }
2278
2279 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2280 {
2281 int cidx;
2282 if (!pcm_oss_file)
2283 return 0;
2284 for (cidx = 0; cidx < 2; ++cidx) {
2285 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2286 if (substream)
2287 snd_pcm_release_substream(substream);
2288 }
2289 kfree(pcm_oss_file);
2290 return 0;
2291 }
2292
2293 static int snd_pcm_oss_open_file(struct file *file,
2294 struct snd_pcm *pcm,
2295 struct snd_pcm_oss_file **rpcm_oss_file,
2296 int minor,
2297 struct snd_pcm_oss_setup *setup)
2298 {
2299 int idx, err;
2300 struct snd_pcm_oss_file *pcm_oss_file;
2301 struct snd_pcm_substream *substream;
2302 fmode_t f_mode = file->f_mode;
2303
2304 if (rpcm_oss_file)
2305 *rpcm_oss_file = NULL;
2306
2307 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2308 if (pcm_oss_file == NULL)
2309 return -ENOMEM;
2310
2311 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2312 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2313 f_mode = FMODE_WRITE;
2314
2315 file->f_flags &= ~O_APPEND;
2316 for (idx = 0; idx < 2; idx++) {
2317 if (setup[idx].disable)
2318 continue;
2319 if (! pcm->streams[idx].substream_count)
2320 continue; /* no matching substream */
2321 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2322 if (! (f_mode & FMODE_WRITE))
2323 continue;
2324 } else {
2325 if (! (f_mode & FMODE_READ))
2326 continue;
2327 }
2328 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2329 if (err < 0) {
2330 snd_pcm_oss_release_file(pcm_oss_file);
2331 return err;
2332 }
2333
2334 pcm_oss_file->streams[idx] = substream;
2335 substream->file = pcm_oss_file;
2336 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2337 }
2338
2339 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2340 snd_pcm_oss_release_file(pcm_oss_file);
2341 return -EINVAL;
2342 }
2343
2344 file->private_data = pcm_oss_file;
2345 if (rpcm_oss_file)
2346 *rpcm_oss_file = pcm_oss_file;
2347 return 0;
2348 }
2349
2350
2351 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2352 {
2353 unsigned int idx;
2354
2355 if (snd_BUG_ON(!task || !name || size < 2))
2356 return -EINVAL;
2357 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2358 name[idx] = task->comm[idx];
2359 name[idx] = '\0';
2360 return 0;
2361 }
2362
2363 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2364 {
2365 int err;
2366 char task_name[32];
2367 struct snd_pcm *pcm;
2368 struct snd_pcm_oss_file *pcm_oss_file;
2369 struct snd_pcm_oss_setup setup[2];
2370 int nonblock;
2371 wait_queue_t wait;
2372
2373 pcm = snd_lookup_oss_minor_data(iminor(inode),
2374 SNDRV_OSS_DEVICE_TYPE_PCM);
2375 if (pcm == NULL) {
2376 err = -ENODEV;
2377 goto __error1;
2378 }
2379 err = snd_card_file_add(pcm->card, file);
2380 if (err < 0)
2381 goto __error1;
2382 if (!try_module_get(pcm->card->module)) {
2383 err = -EFAULT;
2384 goto __error2;
2385 }
2386 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2387 err = -EFAULT;
2388 goto __error;
2389 }
2390 memset(setup, 0, sizeof(setup));
2391 if (file->f_mode & FMODE_WRITE)
2392 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2393 task_name, &setup[0]);
2394 if (file->f_mode & FMODE_READ)
2395 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2396 task_name, &setup[1]);
2397
2398 nonblock = !!(file->f_flags & O_NONBLOCK);
2399 if (!nonblock)
2400 nonblock = nonblock_open;
2401
2402 init_waitqueue_entry(&wait, current);
2403 add_wait_queue(&pcm->open_wait, &wait);
2404 mutex_lock(&pcm->open_mutex);
2405 while (1) {
2406 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2407 iminor(inode), setup);
2408 if (err >= 0)
2409 break;
2410 if (err == -EAGAIN) {
2411 if (nonblock) {
2412 err = -EBUSY;
2413 break;
2414 }
2415 } else
2416 break;
2417 set_current_state(TASK_INTERRUPTIBLE);
2418 mutex_unlock(&pcm->open_mutex);
2419 schedule();
2420 mutex_lock(&pcm->open_mutex);
2421 if (signal_pending(current)) {
2422 err = -ERESTARTSYS;
2423 break;
2424 }
2425 }
2426 remove_wait_queue(&pcm->open_wait, &wait);
2427 mutex_unlock(&pcm->open_mutex);
2428 if (err < 0)
2429 goto __error;
2430 return err;
2431
2432 __error:
2433 module_put(pcm->card->module);
2434 __error2:
2435 snd_card_file_remove(pcm->card, file);
2436 __error1:
2437 return err;
2438 }
2439
2440 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2441 {
2442 struct snd_pcm *pcm;
2443 struct snd_pcm_substream *substream;
2444 struct snd_pcm_oss_file *pcm_oss_file;
2445
2446 pcm_oss_file = file->private_data;
2447 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2448 if (substream == NULL)
2449 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2450 if (snd_BUG_ON(!substream))
2451 return -ENXIO;
2452 pcm = substream->pcm;
2453 if (!pcm->card->shutdown)
2454 snd_pcm_oss_sync(pcm_oss_file);
2455 mutex_lock(&pcm->open_mutex);
2456 snd_pcm_oss_release_file(pcm_oss_file);
2457 mutex_unlock(&pcm->open_mutex);
2458 wake_up(&pcm->open_wait);
2459 module_put(pcm->card->module);
2460 snd_card_file_remove(pcm->card, file);
2461 return 0;
2462 }
2463
2464 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2465 {
2466 struct snd_pcm_oss_file *pcm_oss_file;
2467 int __user *p = (int __user *)arg;
2468 int res;
2469
2470 pcm_oss_file = file->private_data;
2471 if (cmd == OSS_GETVERSION)
2472 return put_user(SNDRV_OSS_VERSION, p);
2473 if (cmd == OSS_ALSAEMULVER)
2474 return put_user(1, p);
2475 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2476 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2477 struct snd_pcm_substream *substream;
2478 int idx;
2479 for (idx = 0; idx < 2; ++idx) {
2480 substream = pcm_oss_file->streams[idx];
2481 if (substream != NULL)
2482 break;
2483 }
2484 if (snd_BUG_ON(idx >= 2))
2485 return -ENXIO;
2486 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2487 }
2488 #endif
2489 if (((cmd >> 8) & 0xff) != 'P')
2490 return -EINVAL;
2491 #ifdef OSS_DEBUG
2492 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2493 #endif
2494 switch (cmd) {
2495 case SNDCTL_DSP_RESET:
2496 return snd_pcm_oss_reset(pcm_oss_file);
2497 case SNDCTL_DSP_SYNC:
2498 return snd_pcm_oss_sync(pcm_oss_file);
2499 case SNDCTL_DSP_SPEED:
2500 if (get_user(res, p))
2501 return -EFAULT;
2502 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2503 return res;
2504 return put_user(res, p);
2505 case SOUND_PCM_READ_RATE:
2506 res = snd_pcm_oss_get_rate(pcm_oss_file);
2507 if (res < 0)
2508 return res;
2509 return put_user(res, p);
2510 case SNDCTL_DSP_STEREO:
2511 if (get_user(res, p))
2512 return -EFAULT;
2513 res = res > 0 ? 2 : 1;
2514 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2515 return res;
2516 return put_user(--res, p);
2517 case SNDCTL_DSP_GETBLKSIZE:
2518 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2519 if (res < 0)
2520 return res;
2521 return put_user(res, p);
2522 case SNDCTL_DSP_SETFMT:
2523 if (get_user(res, p))
2524 return -EFAULT;
2525 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2526 if (res < 0)
2527 return res;
2528 return put_user(res, p);
2529 case SOUND_PCM_READ_BITS:
2530 res = snd_pcm_oss_get_format(pcm_oss_file);
2531 if (res < 0)
2532 return res;
2533 return put_user(res, p);
2534 case SNDCTL_DSP_CHANNELS:
2535 if (get_user(res, p))
2536 return -EFAULT;
2537 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2538 if (res < 0)
2539 return res;
2540 return put_user(res, p);
2541 case SOUND_PCM_READ_CHANNELS:
2542 res = snd_pcm_oss_get_channels(pcm_oss_file);
2543 if (res < 0)
2544 return res;
2545 return put_user(res, p);
2546 case SOUND_PCM_WRITE_FILTER:
2547 case SOUND_PCM_READ_FILTER:
2548 return -EIO;
2549 case SNDCTL_DSP_POST:
2550 return snd_pcm_oss_post(pcm_oss_file);
2551 case SNDCTL_DSP_SUBDIVIDE:
2552 if (get_user(res, p))
2553 return -EFAULT;
2554 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2555 if (res < 0)
2556 return res;
2557 return put_user(res, p);
2558 case SNDCTL_DSP_SETFRAGMENT:
2559 if (get_user(res, p))
2560 return -EFAULT;
2561 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2562 case SNDCTL_DSP_GETFMTS:
2563 res = snd_pcm_oss_get_formats(pcm_oss_file);
2564 if (res < 0)
2565 return res;
2566 return put_user(res, p);
2567 case SNDCTL_DSP_GETOSPACE:
2568 case SNDCTL_DSP_GETISPACE:
2569 return snd_pcm_oss_get_space(pcm_oss_file,
2570 cmd == SNDCTL_DSP_GETISPACE ?
2571 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2572 (struct audio_buf_info __user *) arg);
2573 case SNDCTL_DSP_NONBLOCK:
2574 return snd_pcm_oss_nonblock(file);
2575 case SNDCTL_DSP_GETCAPS:
2576 res = snd_pcm_oss_get_caps(pcm_oss_file);
2577 if (res < 0)
2578 return res;
2579 return put_user(res, p);
2580 case SNDCTL_DSP_GETTRIGGER:
2581 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2582 if (res < 0)
2583 return res;
2584 return put_user(res, p);
2585 case SNDCTL_DSP_SETTRIGGER:
2586 if (get_user(res, p))
2587 return -EFAULT;
2588 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2589 case SNDCTL_DSP_GETIPTR:
2590 case SNDCTL_DSP_GETOPTR:
2591 return snd_pcm_oss_get_ptr(pcm_oss_file,
2592 cmd == SNDCTL_DSP_GETIPTR ?
2593 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2594 (struct count_info __user *) arg);
2595 case SNDCTL_DSP_MAPINBUF:
2596 case SNDCTL_DSP_MAPOUTBUF:
2597 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2598 cmd == SNDCTL_DSP_MAPINBUF ?
2599 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2600 (struct buffmem_desc __user *) arg);
2601 case SNDCTL_DSP_SETSYNCRO:
2602 /* stop DMA now.. */
2603 return 0;
2604 case SNDCTL_DSP_SETDUPLEX:
2605 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2606 return 0;
2607 return -EIO;
2608 case SNDCTL_DSP_GETODELAY:
2609 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2610 if (res < 0) {
2611 /* it's for sure, some broken apps don't check for error codes */
2612 put_user(0, p);
2613 return res;
2614 }
2615 return put_user(res, p);
2616 case SNDCTL_DSP_PROFILE:
2617 return 0; /* silently ignore */
2618 default:
2619 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2620 }
2621 return -EINVAL;
2622 }
2623
2624 #ifdef CONFIG_COMPAT
2625 /* all compatible */
2626 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2627 #else
2628 #define snd_pcm_oss_ioctl_compat NULL
2629 #endif
2630
2631 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2632 {
2633 struct snd_pcm_oss_file *pcm_oss_file;
2634 struct snd_pcm_substream *substream;
2635
2636 pcm_oss_file = file->private_data;
2637 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2638 if (substream == NULL)
2639 return -ENXIO;
2640 substream->f_flags = file->f_flags & O_NONBLOCK;
2641 #ifndef OSS_DEBUG
2642 return snd_pcm_oss_read1(substream, buf, count);
2643 #else
2644 {
2645 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2646 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2647 "(returned %li bytes)\n", (long)count, (long)res);
2648 return res;
2649 }
2650 #endif
2651 }
2652
2653 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2654 {
2655 struct snd_pcm_oss_file *pcm_oss_file;
2656 struct snd_pcm_substream *substream;
2657 long result;
2658
2659 pcm_oss_file = file->private_data;
2660 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2661 if (substream == NULL)
2662 return -ENXIO;
2663 substream->f_flags = file->f_flags & O_NONBLOCK;
2664 result = snd_pcm_oss_write1(substream, buf, count);
2665 #ifdef OSS_DEBUG
2666 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2667 (long)count, (long)result);
2668 #endif
2669 return result;
2670 }
2671
2672 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2673 {
2674 struct snd_pcm_runtime *runtime = substream->runtime;
2675 if (atomic_read(&substream->mmap_count))
2676 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2677 else
2678 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2679 }
2680
2681 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2682 {
2683 struct snd_pcm_runtime *runtime = substream->runtime;
2684 if (atomic_read(&substream->mmap_count))
2685 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2686 else
2687 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2688 }
2689
2690 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2691 {
2692 struct snd_pcm_oss_file *pcm_oss_file;
2693 unsigned int mask;
2694 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2695
2696 pcm_oss_file = file->private_data;
2697
2698 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2699 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2700
2701 mask = 0;
2702 if (psubstream != NULL) {
2703 struct snd_pcm_runtime *runtime = psubstream->runtime;
2704 poll_wait(file, &runtime->sleep, wait);
2705 snd_pcm_stream_lock_irq(psubstream);
2706 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2707 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2708 snd_pcm_oss_playback_ready(psubstream)))
2709 mask |= POLLOUT | POLLWRNORM;
2710 snd_pcm_stream_unlock_irq(psubstream);
2711 }
2712 if (csubstream != NULL) {
2713 struct snd_pcm_runtime *runtime = csubstream->runtime;
2714 snd_pcm_state_t ostate;
2715 poll_wait(file, &runtime->sleep, wait);
2716 snd_pcm_stream_lock_irq(csubstream);
2717 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2718 snd_pcm_oss_capture_ready(csubstream))
2719 mask |= POLLIN | POLLRDNORM;
2720 snd_pcm_stream_unlock_irq(csubstream);
2721 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2722 struct snd_pcm_oss_file ofile;
2723 memset(&ofile, 0, sizeof(ofile));
2724 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2725 runtime->oss.trigger = 0;
2726 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2727 }
2728 }
2729
2730 return mask;
2731 }
2732
2733 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2734 {
2735 struct snd_pcm_oss_file *pcm_oss_file;
2736 struct snd_pcm_substream *substream = NULL;
2737 struct snd_pcm_runtime *runtime;
2738 int err;
2739
2740 #ifdef OSS_DEBUG
2741 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2742 #endif
2743 pcm_oss_file = file->private_data;
2744 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2745 case VM_READ | VM_WRITE:
2746 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2747 if (substream)
2748 break;
2749 /* Fall through */
2750 case VM_READ:
2751 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2752 break;
2753 case VM_WRITE:
2754 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2755 break;
2756 default:
2757 return -EINVAL;
2758 }
2759 /* set VM_READ access as well to fix memset() routines that do
2760 reads before writes (to improve performance) */
2761 area->vm_flags |= VM_READ;
2762 if (substream == NULL)
2763 return -ENXIO;
2764 runtime = substream->runtime;
2765 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2766 return -EIO;
2767 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2768 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2769 else
2770 return -EIO;
2771
2772 if (runtime->oss.params) {
2773 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2774 return err;
2775 }
2776 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2777 if (runtime->oss.plugin_first != NULL)
2778 return -EIO;
2779 #endif
2780
2781 if (area->vm_pgoff != 0)
2782 return -EINVAL;
2783
2784 err = snd_pcm_mmap_data(substream, file, area);
2785 if (err < 0)
2786 return err;
2787 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2788 runtime->silence_threshold = 0;
2789 runtime->silence_size = 0;
2790 #ifdef OSS_DEBUG
2791 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2792 runtime->oss.mmap_bytes);
2793 #endif
2794 /* In mmap mode we never stop */
2795 runtime->stop_threshold = runtime->boundary;
2796
2797 return 0;
2798 }
2799
2800 #ifdef CONFIG_SND_VERBOSE_PROCFS
2801 /*
2802 * /proc interface
2803 */
2804
2805 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2806 struct snd_info_buffer *buffer)
2807 {
2808 struct snd_pcm_str *pstr = entry->private_data;
2809 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2810 mutex_lock(&pstr->oss.setup_mutex);
2811 while (setup) {
2812 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2813 setup->task_name,
2814 setup->periods,
2815 setup->period_size,
2816 setup->disable ? " disable" : "",
2817 setup->direct ? " direct" : "",
2818 setup->block ? " block" : "",
2819 setup->nonblock ? " non-block" : "",
2820 setup->partialfrag ? " partial-frag" : "",
2821 setup->nosilence ? " no-silence" : "");
2822 setup = setup->next;
2823 }
2824 mutex_unlock(&pstr->oss.setup_mutex);
2825 }
2826
2827 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2828 {
2829 struct snd_pcm_oss_setup *setup, *setupn;
2830
2831 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2832 setup; setup = setupn) {
2833 setupn = setup->next;
2834 kfree(setup->task_name);
2835 kfree(setup);
2836 }
2837 pstr->oss.setup_list = NULL;
2838 }
2839
2840 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2841 struct snd_info_buffer *buffer)
2842 {
2843 struct snd_pcm_str *pstr = entry->private_data;
2844 char line[128], str[32], task_name[32], *ptr;
2845 int idx1;
2846 struct snd_pcm_oss_setup *setup, *setup1, template;
2847
2848 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2849 mutex_lock(&pstr->oss.setup_mutex);
2850 memset(&template, 0, sizeof(template));
2851 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2852 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2853 snd_pcm_oss_proc_free_setup_list(pstr);
2854 mutex_unlock(&pstr->oss.setup_mutex);
2855 continue;
2856 }
2857 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2858 if (!strcmp(setup->task_name, task_name)) {
2859 template = *setup;
2860 break;
2861 }
2862 }
2863 ptr = snd_info_get_str(str, ptr, sizeof(str));
2864 template.periods = simple_strtoul(str, NULL, 10);
2865 ptr = snd_info_get_str(str, ptr, sizeof(str));
2866 template.period_size = simple_strtoul(str, NULL, 10);
2867 for (idx1 = 31; idx1 >= 0; idx1--)
2868 if (template.period_size & (1 << idx1))
2869 break;
2870 for (idx1--; idx1 >= 0; idx1--)
2871 template.period_size &= ~(1 << idx1);
2872 do {
2873 ptr = snd_info_get_str(str, ptr, sizeof(str));
2874 if (!strcmp(str, "disable")) {
2875 template.disable = 1;
2876 } else if (!strcmp(str, "direct")) {
2877 template.direct = 1;
2878 } else if (!strcmp(str, "block")) {
2879 template.block = 1;
2880 } else if (!strcmp(str, "non-block")) {
2881 template.nonblock = 1;
2882 } else if (!strcmp(str, "partial-frag")) {
2883 template.partialfrag = 1;
2884 } else if (!strcmp(str, "no-silence")) {
2885 template.nosilence = 1;
2886 } else if (!strcmp(str, "buggy-ptr")) {
2887 template.buggyptr = 1;
2888 }
2889 } while (*str);
2890 if (setup == NULL) {
2891 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2892 if (! setup) {
2893 buffer->error = -ENOMEM;
2894 mutex_unlock(&pstr->oss.setup_mutex);
2895 return;
2896 }
2897 if (pstr->oss.setup_list == NULL)
2898 pstr->oss.setup_list = setup;
2899 else {
2900 for (setup1 = pstr->oss.setup_list;
2901 setup1->next; setup1 = setup1->next);
2902 setup1->next = setup;
2903 }
2904 template.task_name = kstrdup(task_name, GFP_KERNEL);
2905 if (! template.task_name) {
2906 kfree(setup);
2907 buffer->error = -ENOMEM;
2908 mutex_unlock(&pstr->oss.setup_mutex);
2909 return;
2910 }
2911 }
2912 *setup = template;
2913 mutex_unlock(&pstr->oss.setup_mutex);
2914 }
2915 }
2916
2917 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2918 {
2919 int stream;
2920 for (stream = 0; stream < 2; ++stream) {
2921 struct snd_info_entry *entry;
2922 struct snd_pcm_str *pstr = &pcm->streams[stream];
2923 if (pstr->substream_count == 0)
2924 continue;
2925 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2926 entry->content = SNDRV_INFO_CONTENT_TEXT;
2927 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2928 entry->c.text.read = snd_pcm_oss_proc_read;
2929 entry->c.text.write = snd_pcm_oss_proc_write;
2930 entry->private_data = pstr;
2931 if (snd_info_register(entry) < 0) {
2932 snd_info_free_entry(entry);
2933 entry = NULL;
2934 }
2935 }
2936 pstr->oss.proc_entry = entry;
2937 }
2938 }
2939
2940 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2941 {
2942 int stream;
2943 for (stream = 0; stream < 2; ++stream) {
2944 struct snd_pcm_str *pstr = &pcm->streams[stream];
2945 snd_info_free_entry(pstr->oss.proc_entry);
2946 pstr->oss.proc_entry = NULL;
2947 snd_pcm_oss_proc_free_setup_list(pstr);
2948 }
2949 }
2950 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2951 #define snd_pcm_oss_proc_init(pcm)
2952 #define snd_pcm_oss_proc_done(pcm)
2953 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2954
2955 /*
2956 * ENTRY functions
2957 */
2958
2959 static const struct file_operations snd_pcm_oss_f_reg =
2960 {
2961 .owner = THIS_MODULE,
2962 .read = snd_pcm_oss_read,
2963 .write = snd_pcm_oss_write,
2964 .open = snd_pcm_oss_open,
2965 .release = snd_pcm_oss_release,
2966 .poll = snd_pcm_oss_poll,
2967 .unlocked_ioctl = snd_pcm_oss_ioctl,
2968 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2969 .mmap = snd_pcm_oss_mmap,
2970 };
2971
2972 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2973 {
2974 char name[128];
2975 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2976 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2977 pcm->card, index, &snd_pcm_oss_f_reg,
2978 pcm, name) < 0) {
2979 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2980 pcm->card->number, pcm->device);
2981 }
2982 }
2983
2984 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2985 {
2986 pcm->oss.reg = 0;
2987 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2988 char name[128];
2989 int duplex;
2990 register_oss_dsp(pcm, 0);
2991 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2992 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2993 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2994 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2995 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2996 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2997 pcm->card->number,
2998 name);
2999 #endif
3000 pcm->oss.reg++;
3001 pcm->oss.reg_mask |= 1;
3002 }
3003 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3004 register_oss_dsp(pcm, 1);
3005 pcm->oss.reg++;
3006 pcm->oss.reg_mask |= 2;
3007 }
3008
3009 if (pcm->oss.reg)
3010 snd_pcm_oss_proc_init(pcm);
3011
3012 return 0;
3013 }
3014
3015 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3016 {
3017 if (pcm->oss.reg) {
3018 if (pcm->oss.reg_mask & 1) {
3019 pcm->oss.reg_mask &= ~1;
3020 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3021 pcm->card, 0);
3022 }
3023 if (pcm->oss.reg_mask & 2) {
3024 pcm->oss.reg_mask &= ~2;
3025 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3026 pcm->card, 1);
3027 }
3028 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3029 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3030 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3031 #endif
3032 }
3033 pcm->oss.reg = 0;
3034 }
3035 return 0;
3036 }
3037
3038 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3039 {
3040 snd_pcm_oss_disconnect_minor(pcm);
3041 snd_pcm_oss_proc_done(pcm);
3042 return 0;
3043 }
3044
3045 static struct snd_pcm_notify snd_pcm_oss_notify =
3046 {
3047 .n_register = snd_pcm_oss_register_minor,
3048 .n_disconnect = snd_pcm_oss_disconnect_minor,
3049 .n_unregister = snd_pcm_oss_unregister_minor,
3050 };
3051
3052 static int __init alsa_pcm_oss_init(void)
3053 {
3054 int i;
3055 int err;
3056
3057 /* check device map table */
3058 for (i = 0; i < SNDRV_CARDS; i++) {
3059 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3060 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3061 i, dsp_map[i]);
3062 dsp_map[i] = 0;
3063 }
3064 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3065 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3066 i, adsp_map[i]);
3067 adsp_map[i] = 1;
3068 }
3069 }
3070 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3071 return err;
3072 return 0;
3073 }
3074
3075 static void __exit alsa_pcm_oss_exit(void)
3076 {
3077 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3078 }
3079
3080 module_init(alsa_pcm_oss_init)
3081 module_exit(alsa_pcm_oss_exit)
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree