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ALSA: pcm: Fix possible OOB access in PCM oss plugins
[thirdparty/kernel/linux.git] / sound / core / oss / pcm_oss.c
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/sched/signal.h>
32 #include <linux/time.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/math64.h>
36 #include <linux/string.h>
37 #include <linux/compat.h>
38 #include <sound/core.h>
39 #include <sound/minors.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include "pcm_plugin.h"
43 #include <sound/info.h>
44 #include <linux/soundcard.h>
45 #include <sound/initval.h>
46 #include <sound/mixer_oss.h>
47
48 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
49
50 static int dsp_map[SNDRV_CARDS];
51 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
52 static bool nonblock_open = 1;
53
54 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
55 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
56 MODULE_LICENSE("GPL");
57 module_param_array(dsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
59 module_param_array(adsp_map, int, NULL, 0444);
60 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
61 module_param(nonblock_open, bool, 0644);
62 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
64 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
65
66 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
67 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
68 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
69
70 /*
71 * helper functions to process hw_params
72 */
73 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
74 {
75 int changed = 0;
76 if (i->min < min) {
77 i->min = min;
78 i->openmin = openmin;
79 changed = 1;
80 } else if (i->min == min && !i->openmin && openmin) {
81 i->openmin = 1;
82 changed = 1;
83 }
84 if (i->integer) {
85 if (i->openmin) {
86 i->min++;
87 i->openmin = 0;
88 }
89 }
90 if (snd_interval_checkempty(i)) {
91 snd_interval_none(i);
92 return -EINVAL;
93 }
94 return changed;
95 }
96
97 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
98 {
99 int changed = 0;
100 if (i->max > max) {
101 i->max = max;
102 i->openmax = openmax;
103 changed = 1;
104 } else if (i->max == max && !i->openmax && openmax) {
105 i->openmax = 1;
106 changed = 1;
107 }
108 if (i->integer) {
109 if (i->openmax) {
110 i->max--;
111 i->openmax = 0;
112 }
113 }
114 if (snd_interval_checkempty(i)) {
115 snd_interval_none(i);
116 return -EINVAL;
117 }
118 return changed;
119 }
120
121 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
122 {
123 struct snd_interval t;
124 t.empty = 0;
125 t.min = t.max = val;
126 t.openmin = t.openmax = 0;
127 t.integer = 1;
128 return snd_interval_refine(i, &t);
129 }
130
131 /**
132 * snd_pcm_hw_param_value_min
133 * @params: the hw_params instance
134 * @var: parameter to retrieve
135 * @dir: pointer to the direction (-1,0,1) or NULL
136 *
137 * Return the minimum value for field PAR.
138 */
139 static unsigned int
140 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
141 snd_pcm_hw_param_t var, int *dir)
142 {
143 if (hw_is_mask(var)) {
144 if (dir)
145 *dir = 0;
146 return snd_mask_min(hw_param_mask_c(params, var));
147 }
148 if (hw_is_interval(var)) {
149 const struct snd_interval *i = hw_param_interval_c(params, var);
150 if (dir)
151 *dir = i->openmin;
152 return snd_interval_min(i);
153 }
154 return -EINVAL;
155 }
156
157 /**
158 * snd_pcm_hw_param_value_max
159 * @params: the hw_params instance
160 * @var: parameter to retrieve
161 * @dir: pointer to the direction (-1,0,1) or NULL
162 *
163 * Return the maximum value for field PAR.
164 */
165 static unsigned int
166 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
167 snd_pcm_hw_param_t var, int *dir)
168 {
169 if (hw_is_mask(var)) {
170 if (dir)
171 *dir = 0;
172 return snd_mask_max(hw_param_mask_c(params, var));
173 }
174 if (hw_is_interval(var)) {
175 const struct snd_interval *i = hw_param_interval_c(params, var);
176 if (dir)
177 *dir = - (int) i->openmax;
178 return snd_interval_max(i);
179 }
180 return -EINVAL;
181 }
182
183 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
184 snd_pcm_hw_param_t var,
185 const struct snd_mask *val)
186 {
187 int changed;
188 changed = snd_mask_refine(hw_param_mask(params, var), val);
189 if (changed > 0) {
190 params->cmask |= 1 << var;
191 params->rmask |= 1 << var;
192 }
193 return changed;
194 }
195
196 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
197 struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var,
199 const struct snd_mask *val)
200 {
201 int changed = _snd_pcm_hw_param_mask(params, var, val);
202 if (changed < 0)
203 return changed;
204 if (params->rmask) {
205 int err = snd_pcm_hw_refine(pcm, params);
206 if (err < 0)
207 return err;
208 }
209 return 0;
210 }
211
212 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
213 snd_pcm_hw_param_t var, unsigned int val,
214 int dir)
215 {
216 int changed;
217 int open = 0;
218 if (dir) {
219 if (dir > 0) {
220 open = 1;
221 } else if (dir < 0) {
222 if (val > 0) {
223 open = 1;
224 val--;
225 }
226 }
227 }
228 if (hw_is_mask(var))
229 changed = snd_mask_refine_min(hw_param_mask(params, var),
230 val + !!open);
231 else if (hw_is_interval(var))
232 changed = snd_interval_refine_min(hw_param_interval(params, var),
233 val, open);
234 else
235 return -EINVAL;
236 if (changed > 0) {
237 params->cmask |= 1 << var;
238 params->rmask |= 1 << var;
239 }
240 return changed;
241 }
242
243 /**
244 * snd_pcm_hw_param_min
245 * @pcm: PCM instance
246 * @params: the hw_params instance
247 * @var: parameter to retrieve
248 * @val: minimal value
249 * @dir: pointer to the direction (-1,0,1) or NULL
250 *
251 * Inside configuration space defined by PARAMS remove from PAR all
252 * values < VAL. Reduce configuration space accordingly.
253 * Return new minimum or -EINVAL if the configuration space is empty
254 */
255 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
256 struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int *dir)
259 {
260 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
261 if (changed < 0)
262 return changed;
263 if (params->rmask) {
264 int err = snd_pcm_hw_refine(pcm, params);
265 if (err < 0)
266 return err;
267 }
268 return snd_pcm_hw_param_value_min(params, var, dir);
269 }
270
271 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
272 snd_pcm_hw_param_t var, unsigned int val,
273 int dir)
274 {
275 int changed;
276 int open = 0;
277 if (dir) {
278 if (dir < 0) {
279 open = 1;
280 } else if (dir > 0) {
281 open = 1;
282 val++;
283 }
284 }
285 if (hw_is_mask(var)) {
286 if (val == 0 && open) {
287 snd_mask_none(hw_param_mask(params, var));
288 changed = -EINVAL;
289 } else
290 changed = snd_mask_refine_max(hw_param_mask(params, var),
291 val - !!open);
292 } else if (hw_is_interval(var))
293 changed = snd_interval_refine_max(hw_param_interval(params, var),
294 val, open);
295 else
296 return -EINVAL;
297 if (changed > 0) {
298 params->cmask |= 1 << var;
299 params->rmask |= 1 << var;
300 }
301 return changed;
302 }
303
304 /**
305 * snd_pcm_hw_param_max
306 * @pcm: PCM instance
307 * @params: the hw_params instance
308 * @var: parameter to retrieve
309 * @val: maximal value
310 * @dir: pointer to the direction (-1,0,1) or NULL
311 *
312 * Inside configuration space defined by PARAMS remove from PAR all
313 * values >= VAL + 1. Reduce configuration space accordingly.
314 * Return new maximum or -EINVAL if the configuration space is empty
315 */
316 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
317 struct snd_pcm_hw_params *params,
318 snd_pcm_hw_param_t var, unsigned int val,
319 int *dir)
320 {
321 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
322 if (changed < 0)
323 return changed;
324 if (params->rmask) {
325 int err = snd_pcm_hw_refine(pcm, params);
326 if (err < 0)
327 return err;
328 }
329 return snd_pcm_hw_param_value_max(params, var, dir);
330 }
331
332 static int boundary_sub(int a, int adir,
333 int b, int bdir,
334 int *c, int *cdir)
335 {
336 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
337 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
338 *c = a - b;
339 *cdir = adir - bdir;
340 if (*cdir == -2) {
341 (*c)--;
342 } else if (*cdir == 2) {
343 (*c)++;
344 }
345 return 0;
346 }
347
348 static int boundary_lt(unsigned int a, int adir,
349 unsigned int b, int bdir)
350 {
351 if (adir < 0) {
352 a--;
353 adir = 1;
354 } else if (adir > 0)
355 adir = 1;
356 if (bdir < 0) {
357 b--;
358 bdir = 1;
359 } else if (bdir > 0)
360 bdir = 1;
361 return a < b || (a == b && adir < bdir);
362 }
363
364 /* Return 1 if min is nearer to best than max */
365 static int boundary_nearer(int min, int mindir,
366 int best, int bestdir,
367 int max, int maxdir)
368 {
369 int dmin, dmindir;
370 int dmax, dmaxdir;
371 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
372 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
373 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
374 }
375
376 /**
377 * snd_pcm_hw_param_near
378 * @pcm: PCM instance
379 * @params: the hw_params instance
380 * @var: parameter to retrieve
381 * @best: value to set
382 * @dir: pointer to the direction (-1,0,1) or NULL
383 *
384 * Inside configuration space defined by PARAMS set PAR to the available value
385 * nearest to VAL. Reduce configuration space accordingly.
386 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
387 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
388 * Return the value found.
389 */
390 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
391 struct snd_pcm_hw_params *params,
392 snd_pcm_hw_param_t var, unsigned int best,
393 int *dir)
394 {
395 struct snd_pcm_hw_params *save = NULL;
396 int v;
397 unsigned int saved_min;
398 int last = 0;
399 int min, max;
400 int mindir, maxdir;
401 int valdir = dir ? *dir : 0;
402 /* FIXME */
403 if (best > INT_MAX)
404 best = INT_MAX;
405 min = max = best;
406 mindir = maxdir = valdir;
407 if (maxdir > 0)
408 maxdir = 0;
409 else if (maxdir == 0)
410 maxdir = -1;
411 else {
412 maxdir = 1;
413 max--;
414 }
415 save = kmalloc(sizeof(*save), GFP_KERNEL);
416 if (save == NULL)
417 return -ENOMEM;
418 *save = *params;
419 saved_min = min;
420 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
421 if (min >= 0) {
422 struct snd_pcm_hw_params *params1;
423 if (max < 0)
424 goto _end;
425 if ((unsigned int)min == saved_min && mindir == valdir)
426 goto _end;
427 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
428 if (params1 == NULL) {
429 kfree(save);
430 return -ENOMEM;
431 }
432 *params1 = *save;
433 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
434 if (max < 0) {
435 kfree(params1);
436 goto _end;
437 }
438 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
439 *params = *params1;
440 last = 1;
441 }
442 kfree(params1);
443 } else {
444 *params = *save;
445 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
446 if (max < 0) {
447 kfree(save);
448 return max;
449 }
450 last = 1;
451 }
452 _end:
453 kfree(save);
454 if (last)
455 v = snd_pcm_hw_param_last(pcm, params, var, dir);
456 else
457 v = snd_pcm_hw_param_first(pcm, params, var, dir);
458 return v;
459 }
460
461 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
462 snd_pcm_hw_param_t var, unsigned int val,
463 int dir)
464 {
465 int changed;
466 if (hw_is_mask(var)) {
467 struct snd_mask *m = hw_param_mask(params, var);
468 if (val == 0 && dir < 0) {
469 changed = -EINVAL;
470 snd_mask_none(m);
471 } else {
472 if (dir > 0)
473 val++;
474 else if (dir < 0)
475 val--;
476 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
477 }
478 } else if (hw_is_interval(var)) {
479 struct snd_interval *i = hw_param_interval(params, var);
480 if (val == 0 && dir < 0) {
481 changed = -EINVAL;
482 snd_interval_none(i);
483 } else if (dir == 0)
484 changed = snd_interval_refine_set(i, val);
485 else {
486 struct snd_interval t;
487 t.openmin = 1;
488 t.openmax = 1;
489 t.empty = 0;
490 t.integer = 0;
491 if (dir < 0) {
492 t.min = val - 1;
493 t.max = val;
494 } else {
495 t.min = val;
496 t.max = val+1;
497 }
498 changed = snd_interval_refine(i, &t);
499 }
500 } else
501 return -EINVAL;
502 if (changed > 0) {
503 params->cmask |= 1 << var;
504 params->rmask |= 1 << var;
505 }
506 return changed;
507 }
508
509 /**
510 * snd_pcm_hw_param_set
511 * @pcm: PCM instance
512 * @params: the hw_params instance
513 * @var: parameter to retrieve
514 * @val: value to set
515 * @dir: pointer to the direction (-1,0,1) or NULL
516 *
517 * Inside configuration space defined by PARAMS remove from PAR all
518 * values != VAL. Reduce configuration space accordingly.
519 * Return VAL or -EINVAL if the configuration space is empty
520 */
521 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
522 struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var, unsigned int val,
524 int dir)
525 {
526 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
527 if (changed < 0)
528 return changed;
529 if (params->rmask) {
530 int err = snd_pcm_hw_refine(pcm, params);
531 if (err < 0)
532 return err;
533 }
534 return snd_pcm_hw_param_value(params, var, NULL);
535 }
536
537 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
538 snd_pcm_hw_param_t var)
539 {
540 int changed;
541 changed = snd_interval_setinteger(hw_param_interval(params, var));
542 if (changed > 0) {
543 params->cmask |= 1 << var;
544 params->rmask |= 1 << var;
545 }
546 return changed;
547 }
548
549 /*
550 * plugin
551 */
552
553 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
554 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
555 {
556 struct snd_pcm_runtime *runtime = substream->runtime;
557 struct snd_pcm_plugin *plugin, *next;
558
559 plugin = runtime->oss.plugin_first;
560 while (plugin) {
561 next = plugin->next;
562 snd_pcm_plugin_free(plugin);
563 plugin = next;
564 }
565 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
566 return 0;
567 }
568
569 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
570 {
571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
572 plugin->next = runtime->oss.plugin_first;
573 plugin->prev = NULL;
574 if (runtime->oss.plugin_first) {
575 runtime->oss.plugin_first->prev = plugin;
576 runtime->oss.plugin_first = plugin;
577 } else {
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
580 }
581 return 0;
582 }
583
584 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
585 {
586 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
587 plugin->next = NULL;
588 plugin->prev = runtime->oss.plugin_last;
589 if (runtime->oss.plugin_last) {
590 runtime->oss.plugin_last->next = plugin;
591 runtime->oss.plugin_last = plugin;
592 } else {
593 runtime->oss.plugin_last =
594 runtime->oss.plugin_first = plugin;
595 }
596 return 0;
597 }
598 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
599
600 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
601 {
602 struct snd_pcm_runtime *runtime = substream->runtime;
603 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
604 long bytes = frames_to_bytes(runtime, frames);
605 if (buffer_size == runtime->oss.buffer_bytes)
606 return bytes;
607 #if BITS_PER_LONG >= 64
608 return runtime->oss.buffer_bytes * bytes / buffer_size;
609 #else
610 {
611 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
612 return div_u64(bsize, buffer_size);
613 }
614 #endif
615 }
616
617 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
618 {
619 struct snd_pcm_runtime *runtime = substream->runtime;
620 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
621 if (buffer_size == runtime->oss.buffer_bytes)
622 return bytes_to_frames(runtime, bytes);
623 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
624 }
625
626 static inline
627 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
628 {
629 return runtime->hw_ptr_interrupt;
630 }
631
632 /* define extended formats in the recent OSS versions (if any) */
633 /* linear formats */
634 #define AFMT_S32_LE 0x00001000
635 #define AFMT_S32_BE 0x00002000
636 #define AFMT_S24_LE 0x00008000
637 #define AFMT_S24_BE 0x00010000
638 #define AFMT_S24_PACKED 0x00040000
639
640 /* other supported formats */
641 #define AFMT_FLOAT 0x00004000
642 #define AFMT_SPDIF_RAW 0x00020000
643
644 /* unsupported formats */
645 #define AFMT_AC3 0x00000400
646 #define AFMT_VORBIS 0x00000800
647
648 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
649 {
650 switch (format) {
651 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
652 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
653 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
654 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
655 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
656 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
657 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
658 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
659 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
660 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
661 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
662 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
663 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
664 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
665 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
666 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
667 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
668 default: return SNDRV_PCM_FORMAT_U8;
669 }
670 }
671
672 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
673 {
674 switch (format) {
675 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
676 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
677 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
678 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
679 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
680 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
681 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
682 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
683 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
684 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
685 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
686 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
687 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
688 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
689 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
690 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
691 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
692 default: return -EINVAL;
693 }
694 }
695
696 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
697 struct snd_pcm_hw_params *oss_params,
698 struct snd_pcm_hw_params *slave_params)
699 {
700 size_t s;
701 size_t oss_buffer_size, oss_period_size, oss_periods;
702 size_t min_period_size, max_period_size;
703 struct snd_pcm_runtime *runtime = substream->runtime;
704 size_t oss_frame_size;
705
706 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
707 params_channels(oss_params) / 8;
708
709 oss_buffer_size = snd_pcm_plug_client_size(substream,
710 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
711 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
712 if (atomic_read(&substream->mmap_count)) {
713 if (oss_buffer_size > runtime->oss.mmap_bytes)
714 oss_buffer_size = runtime->oss.mmap_bytes;
715 }
716
717 if (substream->oss.setup.period_size > 16)
718 oss_period_size = substream->oss.setup.period_size;
719 else if (runtime->oss.fragshift) {
720 oss_period_size = 1 << runtime->oss.fragshift;
721 if (oss_period_size > oss_buffer_size / 2)
722 oss_period_size = oss_buffer_size / 2;
723 } else {
724 int sd;
725 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
726
727 oss_period_size = oss_buffer_size;
728 do {
729 oss_period_size /= 2;
730 } while (oss_period_size > bytes_per_sec);
731 if (runtime->oss.subdivision == 0) {
732 sd = 4;
733 if (oss_period_size / sd > 4096)
734 sd *= 2;
735 if (oss_period_size / sd < 4096)
736 sd = 1;
737 } else
738 sd = runtime->oss.subdivision;
739 oss_period_size /= sd;
740 if (oss_period_size < 16)
741 oss_period_size = 16;
742 }
743
744 min_period_size = snd_pcm_plug_client_size(substream,
745 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
746 min_period_size *= oss_frame_size;
747 min_period_size = roundup_pow_of_two(min_period_size);
748 if (oss_period_size < min_period_size)
749 oss_period_size = min_period_size;
750
751 max_period_size = snd_pcm_plug_client_size(substream,
752 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
753 max_period_size *= oss_frame_size;
754 max_period_size = rounddown_pow_of_two(max_period_size);
755 if (oss_period_size > max_period_size)
756 oss_period_size = max_period_size;
757
758 oss_periods = oss_buffer_size / oss_period_size;
759
760 if (substream->oss.setup.periods > 1)
761 oss_periods = substream->oss.setup.periods;
762
763 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
764 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
765 s = runtime->oss.maxfrags;
766 if (oss_periods > s)
767 oss_periods = s;
768
769 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
770 if (s < 2)
771 s = 2;
772 if (oss_periods < s)
773 oss_periods = s;
774
775 while (oss_period_size * oss_periods > oss_buffer_size)
776 oss_period_size /= 2;
777
778 if (oss_period_size < 16)
779 return -EINVAL;
780 runtime->oss.period_bytes = oss_period_size;
781 runtime->oss.period_frames = 1;
782 runtime->oss.periods = oss_periods;
783 return 0;
784 }
785
786 static int choose_rate(struct snd_pcm_substream *substream,
787 struct snd_pcm_hw_params *params, unsigned int best_rate)
788 {
789 const struct snd_interval *it;
790 struct snd_pcm_hw_params *save;
791 unsigned int rate, prev;
792
793 save = kmalloc(sizeof(*save), GFP_KERNEL);
794 if (save == NULL)
795 return -ENOMEM;
796 *save = *params;
797 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
798
799 /* try multiples of the best rate */
800 rate = best_rate;
801 for (;;) {
802 if (it->max < rate || (it->max == rate && it->openmax))
803 break;
804 if (it->min < rate || (it->min == rate && !it->openmin)) {
805 int ret;
806 ret = snd_pcm_hw_param_set(substream, params,
807 SNDRV_PCM_HW_PARAM_RATE,
808 rate, 0);
809 if (ret == (int)rate) {
810 kfree(save);
811 return rate;
812 }
813 *params = *save;
814 }
815 prev = rate;
816 rate += best_rate;
817 if (rate <= prev)
818 break;
819 }
820
821 /* not found, use the nearest rate */
822 kfree(save);
823 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
824 }
825
826 /* parameter locking: returns immediately if tried during streaming */
827 static int lock_params(struct snd_pcm_runtime *runtime)
828 {
829 if (mutex_lock_interruptible(&runtime->oss.params_lock))
830 return -ERESTARTSYS;
831 if (atomic_read(&runtime->oss.rw_ref)) {
832 mutex_unlock(&runtime->oss.params_lock);
833 return -EBUSY;
834 }
835 return 0;
836 }
837
838 static void unlock_params(struct snd_pcm_runtime *runtime)
839 {
840 mutex_unlock(&runtime->oss.params_lock);
841 }
842
843 /* call with params_lock held */
844 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
845 {
846 struct snd_pcm_runtime *runtime = substream->runtime;
847 struct snd_pcm_hw_params *params, *sparams;
848 struct snd_pcm_sw_params *sw_params;
849 ssize_t oss_buffer_size, oss_period_size;
850 size_t oss_frame_size;
851 int err;
852 int direct;
853 snd_pcm_format_t format, sformat;
854 int n;
855 const struct snd_mask *sformat_mask;
856 struct snd_mask mask;
857
858 if (!runtime->oss.params)
859 return 0;
860 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
861 params = kmalloc(sizeof(*params), GFP_KERNEL);
862 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
863 if (!sw_params || !params || !sparams) {
864 err = -ENOMEM;
865 goto failure;
866 }
867
868 if (atomic_read(&substream->mmap_count))
869 direct = 1;
870 else
871 direct = substream->oss.setup.direct;
872
873 _snd_pcm_hw_params_any(sparams);
874 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
875 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
876 snd_mask_none(&mask);
877 if (atomic_read(&substream->mmap_count))
878 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
879 else {
880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
881 if (!direct)
882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
883 }
884 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
885 if (err < 0) {
886 pcm_dbg(substream->pcm, "No usable accesses\n");
887 err = -EINVAL;
888 goto failure;
889 }
890 choose_rate(substream, sparams, runtime->oss.rate);
891 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
892
893 format = snd_pcm_oss_format_from(runtime->oss.format);
894
895 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
896 if (direct)
897 sformat = format;
898 else
899 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
900
901 if ((__force int)sformat < 0 ||
902 !snd_mask_test(sformat_mask, (__force int)sformat)) {
903 for (sformat = (__force snd_pcm_format_t)0;
904 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
905 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
906 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
907 snd_pcm_oss_format_to(sformat) >= 0)
908 break;
909 }
910 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
911 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
912 err = -EINVAL;
913 goto failure;
914 }
915 }
916 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
917 if (err < 0)
918 goto failure;
919
920 if (direct) {
921 memcpy(params, sparams, sizeof(*params));
922 } else {
923 _snd_pcm_hw_params_any(params);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
925 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
926 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
927 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
928 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
929 runtime->oss.channels, 0);
930 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
931 runtime->oss.rate, 0);
932 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
933 params_access(params), params_format(params),
934 params_channels(params), params_rate(params));
935 }
936 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
937 params_access(sparams), params_format(sparams),
938 params_channels(sparams), params_rate(sparams));
939
940 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
941 params_channels(params) / 8;
942
943 err = snd_pcm_oss_period_size(substream, params, sparams);
944 if (err < 0)
945 goto failure;
946
947 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
948 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
949 if (err < 0)
950 goto failure;
951
952 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
953 runtime->oss.periods, NULL);
954 if (err < 0)
955 goto failure;
956
957 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
958
959 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
960 if (err < 0) {
961 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
962 goto failure;
963 }
964
965 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
966 snd_pcm_oss_plugin_clear(substream);
967 if (!direct) {
968 /* add necessary plugins */
969 snd_pcm_oss_plugin_clear(substream);
970 if ((err = snd_pcm_plug_format_plugins(substream,
971 params,
972 sparams)) < 0) {
973 pcm_dbg(substream->pcm,
974 "snd_pcm_plug_format_plugins failed: %i\n", err);
975 snd_pcm_oss_plugin_clear(substream);
976 goto failure;
977 }
978 if (runtime->oss.plugin_first) {
979 struct snd_pcm_plugin *plugin;
980 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
981 pcm_dbg(substream->pcm,
982 "snd_pcm_plugin_build_io failed: %i\n", err);
983 snd_pcm_oss_plugin_clear(substream);
984 goto failure;
985 }
986 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
987 err = snd_pcm_plugin_append(plugin);
988 } else {
989 err = snd_pcm_plugin_insert(plugin);
990 }
991 if (err < 0) {
992 snd_pcm_oss_plugin_clear(substream);
993 goto failure;
994 }
995 }
996 }
997 #endif
998
999 if (runtime->oss.trigger) {
1000 sw_params->start_threshold = 1;
1001 } else {
1002 sw_params->start_threshold = runtime->boundary;
1003 }
1004 if (atomic_read(&substream->mmap_count) ||
1005 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1006 sw_params->stop_threshold = runtime->boundary;
1007 else
1008 sw_params->stop_threshold = runtime->buffer_size;
1009 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1010 sw_params->period_step = 1;
1011 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1012 1 : runtime->period_size;
1013 if (atomic_read(&substream->mmap_count) ||
1014 substream->oss.setup.nosilence) {
1015 sw_params->silence_threshold = 0;
1016 sw_params->silence_size = 0;
1017 } else {
1018 snd_pcm_uframes_t frames;
1019 frames = runtime->period_size + 16;
1020 if (frames > runtime->buffer_size)
1021 frames = runtime->buffer_size;
1022 sw_params->silence_threshold = frames;
1023 sw_params->silence_size = frames;
1024 }
1025
1026 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1027 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1028 goto failure;
1029 }
1030
1031 runtime->oss.periods = params_periods(sparams);
1032 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1033 if (oss_period_size < 0) {
1034 err = -EINVAL;
1035 goto failure;
1036 }
1037 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1038 if (runtime->oss.plugin_first) {
1039 err = snd_pcm_plug_alloc(substream, oss_period_size);
1040 if (err < 0)
1041 goto failure;
1042 }
1043 #endif
1044 oss_period_size *= oss_frame_size;
1045
1046 oss_buffer_size = oss_period_size * runtime->oss.periods;
1047 if (oss_buffer_size < 0) {
1048 err = -EINVAL;
1049 goto failure;
1050 }
1051
1052 runtime->oss.period_bytes = oss_period_size;
1053 runtime->oss.buffer_bytes = oss_buffer_size;
1054
1055 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1056 runtime->oss.period_bytes,
1057 runtime->oss.buffer_bytes);
1058 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1059 params_period_size(sparams),
1060 params_buffer_size(sparams));
1061
1062 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1063 runtime->oss.channels = params_channels(params);
1064 runtime->oss.rate = params_rate(params);
1065
1066 kvfree(runtime->oss.buffer);
1067 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1068 if (!runtime->oss.buffer) {
1069 err = -ENOMEM;
1070 goto failure;
1071 }
1072
1073 runtime->oss.params = 0;
1074 runtime->oss.prepare = 1;
1075 runtime->oss.buffer_used = 0;
1076 if (runtime->dma_area)
1077 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1078
1079 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1080
1081 err = 0;
1082 failure:
1083 kfree(sw_params);
1084 kfree(params);
1085 kfree(sparams);
1086 return err;
1087 }
1088
1089 /* this one takes the lock by itself */
1090 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1091 bool trylock)
1092 {
1093 struct snd_pcm_runtime *runtime = substream->runtime;
1094 int err;
1095
1096 if (trylock) {
1097 if (!(mutex_trylock(&runtime->oss.params_lock)))
1098 return -EAGAIN;
1099 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1100 return -ERESTARTSYS;
1101
1102 err = snd_pcm_oss_change_params_locked(substream);
1103 mutex_unlock(&runtime->oss.params_lock);
1104 return err;
1105 }
1106
1107 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1108 {
1109 int idx, err;
1110 struct snd_pcm_substream *asubstream = NULL, *substream;
1111
1112 for (idx = 0; idx < 2; idx++) {
1113 substream = pcm_oss_file->streams[idx];
1114 if (substream == NULL)
1115 continue;
1116 if (asubstream == NULL)
1117 asubstream = substream;
1118 if (substream->runtime->oss.params) {
1119 err = snd_pcm_oss_change_params(substream, false);
1120 if (err < 0)
1121 return err;
1122 }
1123 }
1124 if (!asubstream)
1125 return -EIO;
1126 if (r_substream)
1127 *r_substream = asubstream;
1128 return 0;
1129 }
1130
1131 /* call with params_lock held */
1132 /* NOTE: this always call PREPARE unconditionally no matter whether
1133 * runtime->oss.prepare is set or not
1134 */
1135 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1136 {
1137 int err;
1138 struct snd_pcm_runtime *runtime = substream->runtime;
1139
1140 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1141 if (err < 0) {
1142 pcm_dbg(substream->pcm,
1143 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1144 return err;
1145 }
1146 runtime->oss.prepare = 0;
1147 runtime->oss.prev_hw_ptr_period = 0;
1148 runtime->oss.period_ptr = 0;
1149 runtime->oss.buffer_used = 0;
1150
1151 return 0;
1152 }
1153
1154 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1155 {
1156 struct snd_pcm_runtime *runtime;
1157 int err;
1158
1159 runtime = substream->runtime;
1160 if (runtime->oss.params) {
1161 err = snd_pcm_oss_change_params(substream, false);
1162 if (err < 0)
1163 return err;
1164 }
1165 if (runtime->oss.prepare) {
1166 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1167 return -ERESTARTSYS;
1168 err = snd_pcm_oss_prepare(substream);
1169 mutex_unlock(&runtime->oss.params_lock);
1170 if (err < 0)
1171 return err;
1172 }
1173 return 0;
1174 }
1175
1176 /* call with params_lock held */
1177 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1178 {
1179 struct snd_pcm_runtime *runtime;
1180 int err;
1181
1182 runtime = substream->runtime;
1183 if (runtime->oss.params) {
1184 err = snd_pcm_oss_change_params_locked(substream);
1185 if (err < 0)
1186 return err;
1187 }
1188 if (runtime->oss.prepare) {
1189 err = snd_pcm_oss_prepare(substream);
1190 if (err < 0)
1191 return err;
1192 }
1193 return 0;
1194 }
1195
1196 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1197 {
1198 struct snd_pcm_runtime *runtime;
1199 snd_pcm_uframes_t frames;
1200 int err = 0;
1201
1202 while (1) {
1203 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1204 if (err < 0)
1205 break;
1206 runtime = substream->runtime;
1207 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1208 break;
1209 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1210 /* until avail(delay) <= buffer_size */
1211 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1212 frames /= runtime->period_size;
1213 frames *= runtime->period_size;
1214 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1215 if (err < 0)
1216 break;
1217 }
1218 return err;
1219 }
1220
1221 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1222 {
1223 struct snd_pcm_runtime *runtime = substream->runtime;
1224 int ret;
1225 while (1) {
1226 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1227 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1228 #ifdef OSS_DEBUG
1229 pcm_dbg(substream->pcm,
1230 "pcm_oss: write: recovering from %s\n",
1231 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1232 "XRUN" : "SUSPEND");
1233 #endif
1234 ret = snd_pcm_oss_prepare(substream);
1235 if (ret < 0)
1236 break;
1237 }
1238 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1239 frames, in_kernel);
1240 if (ret != -EPIPE && ret != -ESTRPIPE)
1241 break;
1242 /* test, if we can't store new data, because the stream */
1243 /* has not been started */
1244 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1245 return -EAGAIN;
1246 }
1247 return ret;
1248 }
1249
1250 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1251 {
1252 struct snd_pcm_runtime *runtime = substream->runtime;
1253 snd_pcm_sframes_t delay;
1254 int ret;
1255 while (1) {
1256 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1257 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1258 #ifdef OSS_DEBUG
1259 pcm_dbg(substream->pcm,
1260 "pcm_oss: read: recovering from %s\n",
1261 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1262 "XRUN" : "SUSPEND");
1263 #endif
1264 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1265 if (ret < 0)
1266 break;
1267 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1268 ret = snd_pcm_oss_prepare(substream);
1269 if (ret < 0)
1270 break;
1271 }
1272 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1273 if (ret < 0)
1274 break;
1275 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1276 frames, in_kernel);
1277 if (ret == -EPIPE) {
1278 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1279 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1280 if (ret < 0)
1281 break;
1282 }
1283 continue;
1284 }
1285 if (ret != -ESTRPIPE)
1286 break;
1287 }
1288 return ret;
1289 }
1290
1291 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1292 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1293 {
1294 struct snd_pcm_runtime *runtime = substream->runtime;
1295 int ret;
1296 while (1) {
1297 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1298 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1299 #ifdef OSS_DEBUG
1300 pcm_dbg(substream->pcm,
1301 "pcm_oss: writev: recovering from %s\n",
1302 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1303 "XRUN" : "SUSPEND");
1304 #endif
1305 ret = snd_pcm_oss_prepare(substream);
1306 if (ret < 0)
1307 break;
1308 }
1309 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1310 if (ret != -EPIPE && ret != -ESTRPIPE)
1311 break;
1312
1313 /* test, if we can't store new data, because the stream */
1314 /* has not been started */
1315 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1316 return -EAGAIN;
1317 }
1318 return ret;
1319 }
1320
1321 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1322 {
1323 struct snd_pcm_runtime *runtime = substream->runtime;
1324 int ret;
1325 while (1) {
1326 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1327 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1328 #ifdef OSS_DEBUG
1329 pcm_dbg(substream->pcm,
1330 "pcm_oss: readv: recovering from %s\n",
1331 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1332 "XRUN" : "SUSPEND");
1333 #endif
1334 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1335 if (ret < 0)
1336 break;
1337 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1338 ret = snd_pcm_oss_prepare(substream);
1339 if (ret < 0)
1340 break;
1341 }
1342 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1343 if (ret != -EPIPE && ret != -ESTRPIPE)
1344 break;
1345 }
1346 return ret;
1347 }
1348 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1349
1350 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1351 {
1352 struct snd_pcm_runtime *runtime = substream->runtime;
1353 snd_pcm_sframes_t frames, frames1;
1354 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1355 if (runtime->oss.plugin_first) {
1356 struct snd_pcm_plugin_channel *channels;
1357 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1358 if (!in_kernel) {
1359 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1360 return -EFAULT;
1361 buf = runtime->oss.buffer;
1362 }
1363 frames = bytes / oss_frame_bytes;
1364 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1365 if (frames1 < 0)
1366 return frames1;
1367 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1368 if (frames1 <= 0)
1369 return frames1;
1370 bytes = frames1 * oss_frame_bytes;
1371 } else
1372 #endif
1373 {
1374 frames = bytes_to_frames(runtime, bytes);
1375 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1376 if (frames1 <= 0)
1377 return frames1;
1378 bytes = frames_to_bytes(runtime, frames1);
1379 }
1380 return bytes;
1381 }
1382
1383 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1384 {
1385 size_t xfer = 0;
1386 ssize_t tmp = 0;
1387 struct snd_pcm_runtime *runtime = substream->runtime;
1388
1389 if (atomic_read(&substream->mmap_count))
1390 return -ENXIO;
1391
1392 atomic_inc(&runtime->oss.rw_ref);
1393 while (bytes > 0) {
1394 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1395 tmp = -ERESTARTSYS;
1396 break;
1397 }
1398 tmp = snd_pcm_oss_make_ready_locked(substream);
1399 if (tmp < 0)
1400 goto err;
1401 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1402 tmp = bytes;
1403 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1404 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1405 if (tmp > 0) {
1406 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1407 tmp = -EFAULT;
1408 goto err;
1409 }
1410 }
1411 runtime->oss.buffer_used += tmp;
1412 buf += tmp;
1413 bytes -= tmp;
1414 xfer += tmp;
1415 if (substream->oss.setup.partialfrag ||
1416 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1417 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1418 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1419 if (tmp <= 0)
1420 goto err;
1421 runtime->oss.bytes += tmp;
1422 runtime->oss.period_ptr += tmp;
1423 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1424 if (runtime->oss.period_ptr == 0 ||
1425 runtime->oss.period_ptr == runtime->oss.buffer_used)
1426 runtime->oss.buffer_used = 0;
1427 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1428 tmp = -EAGAIN;
1429 goto err;
1430 }
1431 }
1432 } else {
1433 tmp = snd_pcm_oss_write2(substream,
1434 (const char __force *)buf,
1435 runtime->oss.period_bytes, 0);
1436 if (tmp <= 0)
1437 goto err;
1438 runtime->oss.bytes += tmp;
1439 buf += tmp;
1440 bytes -= tmp;
1441 xfer += tmp;
1442 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1443 tmp != runtime->oss.period_bytes)
1444 tmp = -EAGAIN;
1445 }
1446 err:
1447 mutex_unlock(&runtime->oss.params_lock);
1448 if (tmp < 0)
1449 break;
1450 if (signal_pending(current)) {
1451 tmp = -ERESTARTSYS;
1452 break;
1453 }
1454 tmp = 0;
1455 }
1456 atomic_dec(&runtime->oss.rw_ref);
1457 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1458 }
1459
1460 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1461 {
1462 struct snd_pcm_runtime *runtime = substream->runtime;
1463 snd_pcm_sframes_t frames, frames1;
1464 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1465 char __user *final_dst = (char __force __user *)buf;
1466 if (runtime->oss.plugin_first) {
1467 struct snd_pcm_plugin_channel *channels;
1468 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1469 if (!in_kernel)
1470 buf = runtime->oss.buffer;
1471 frames = bytes / oss_frame_bytes;
1472 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1473 if (frames1 < 0)
1474 return frames1;
1475 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1476 if (frames1 <= 0)
1477 return frames1;
1478 bytes = frames1 * oss_frame_bytes;
1479 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1480 return -EFAULT;
1481 } else
1482 #endif
1483 {
1484 frames = bytes_to_frames(runtime, bytes);
1485 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1486 if (frames1 <= 0)
1487 return frames1;
1488 bytes = frames_to_bytes(runtime, frames1);
1489 }
1490 return bytes;
1491 }
1492
1493 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1494 {
1495 size_t xfer = 0;
1496 ssize_t tmp = 0;
1497 struct snd_pcm_runtime *runtime = substream->runtime;
1498
1499 if (atomic_read(&substream->mmap_count))
1500 return -ENXIO;
1501
1502 atomic_inc(&runtime->oss.rw_ref);
1503 while (bytes > 0) {
1504 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1505 tmp = -ERESTARTSYS;
1506 break;
1507 }
1508 tmp = snd_pcm_oss_make_ready_locked(substream);
1509 if (tmp < 0)
1510 goto err;
1511 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1512 if (runtime->oss.buffer_used == 0) {
1513 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1514 if (tmp <= 0)
1515 goto err;
1516 runtime->oss.bytes += tmp;
1517 runtime->oss.period_ptr = tmp;
1518 runtime->oss.buffer_used = tmp;
1519 }
1520 tmp = bytes;
1521 if ((size_t) tmp > runtime->oss.buffer_used)
1522 tmp = runtime->oss.buffer_used;
1523 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1524 tmp = -EFAULT;
1525 goto err;
1526 }
1527 buf += tmp;
1528 bytes -= tmp;
1529 xfer += tmp;
1530 runtime->oss.buffer_used -= tmp;
1531 } else {
1532 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1533 runtime->oss.period_bytes, 0);
1534 if (tmp <= 0)
1535 goto err;
1536 runtime->oss.bytes += tmp;
1537 buf += tmp;
1538 bytes -= tmp;
1539 xfer += tmp;
1540 }
1541 err:
1542 mutex_unlock(&runtime->oss.params_lock);
1543 if (tmp < 0)
1544 break;
1545 if (signal_pending(current)) {
1546 tmp = -ERESTARTSYS;
1547 break;
1548 }
1549 tmp = 0;
1550 }
1551 atomic_dec(&runtime->oss.rw_ref);
1552 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1553 }
1554
1555 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1556 {
1557 struct snd_pcm_substream *substream;
1558 struct snd_pcm_runtime *runtime;
1559 int i;
1560
1561 for (i = 0; i < 2; i++) {
1562 substream = pcm_oss_file->streams[i];
1563 if (!substream)
1564 continue;
1565 runtime = substream->runtime;
1566 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1567 mutex_lock(&runtime->oss.params_lock);
1568 runtime->oss.prepare = 1;
1569 runtime->oss.buffer_used = 0;
1570 runtime->oss.prev_hw_ptr_period = 0;
1571 runtime->oss.period_ptr = 0;
1572 mutex_unlock(&runtime->oss.params_lock);
1573 }
1574 return 0;
1575 }
1576
1577 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1578 {
1579 struct snd_pcm_substream *substream;
1580 int err;
1581
1582 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1583 if (substream != NULL) {
1584 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1585 return err;
1586 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1587 }
1588 /* note: all errors from the start action are ignored */
1589 /* OSS apps do not know, how to handle them */
1590 return 0;
1591 }
1592
1593 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1594 {
1595 struct snd_pcm_runtime *runtime;
1596 ssize_t result = 0;
1597 snd_pcm_state_t state;
1598 long res;
1599 wait_queue_entry_t wait;
1600
1601 runtime = substream->runtime;
1602 init_waitqueue_entry(&wait, current);
1603 add_wait_queue(&runtime->sleep, &wait);
1604 #ifdef OSS_DEBUG
1605 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1606 #endif
1607 while (1) {
1608 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1609 if (result > 0) {
1610 runtime->oss.buffer_used = 0;
1611 result = 0;
1612 break;
1613 }
1614 if (result != 0 && result != -EAGAIN)
1615 break;
1616 result = 0;
1617 set_current_state(TASK_INTERRUPTIBLE);
1618 snd_pcm_stream_lock_irq(substream);
1619 state = runtime->status->state;
1620 snd_pcm_stream_unlock_irq(substream);
1621 if (state != SNDRV_PCM_STATE_RUNNING) {
1622 set_current_state(TASK_RUNNING);
1623 break;
1624 }
1625 res = schedule_timeout(10 * HZ);
1626 if (signal_pending(current)) {
1627 result = -ERESTARTSYS;
1628 break;
1629 }
1630 if (res == 0) {
1631 pcm_err(substream->pcm,
1632 "OSS sync error - DMA timeout\n");
1633 result = -EIO;
1634 break;
1635 }
1636 }
1637 remove_wait_queue(&runtime->sleep, &wait);
1638 return result;
1639 }
1640
1641 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1642 {
1643 int err = 0;
1644 unsigned int saved_f_flags;
1645 struct snd_pcm_substream *substream;
1646 struct snd_pcm_runtime *runtime;
1647 snd_pcm_format_t format;
1648 unsigned long width;
1649 size_t size;
1650
1651 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1652 if (substream != NULL) {
1653 runtime = substream->runtime;
1654 if (atomic_read(&substream->mmap_count))
1655 goto __direct;
1656 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1657 return err;
1658 atomic_inc(&runtime->oss.rw_ref);
1659 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1660 atomic_dec(&runtime->oss.rw_ref);
1661 return -ERESTARTSYS;
1662 }
1663 format = snd_pcm_oss_format_from(runtime->oss.format);
1664 width = snd_pcm_format_physical_width(format);
1665 if (runtime->oss.buffer_used > 0) {
1666 #ifdef OSS_DEBUG
1667 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1668 #endif
1669 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1670 snd_pcm_format_set_silence(format,
1671 runtime->oss.buffer + runtime->oss.buffer_used,
1672 size);
1673 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1674 if (err < 0)
1675 goto unlock;
1676 } else if (runtime->oss.period_ptr > 0) {
1677 #ifdef OSS_DEBUG
1678 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1679 #endif
1680 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1681 snd_pcm_format_set_silence(format,
1682 runtime->oss.buffer,
1683 size * 8 / width);
1684 err = snd_pcm_oss_sync1(substream, size);
1685 if (err < 0)
1686 goto unlock;
1687 }
1688 /*
1689 * The ALSA's period might be a bit large than OSS one.
1690 * Fill the remain portion of ALSA period with zeros.
1691 */
1692 size = runtime->control->appl_ptr % runtime->period_size;
1693 if (size > 0) {
1694 size = runtime->period_size - size;
1695 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1696 snd_pcm_lib_write(substream, NULL, size);
1697 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1698 snd_pcm_lib_writev(substream, NULL, size);
1699 }
1700 unlock:
1701 mutex_unlock(&runtime->oss.params_lock);
1702 atomic_dec(&runtime->oss.rw_ref);
1703 if (err < 0)
1704 return err;
1705 /*
1706 * finish sync: drain the buffer
1707 */
1708 __direct:
1709 saved_f_flags = substream->f_flags;
1710 substream->f_flags &= ~O_NONBLOCK;
1711 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1712 substream->f_flags = saved_f_flags;
1713 if (err < 0)
1714 return err;
1715 mutex_lock(&runtime->oss.params_lock);
1716 runtime->oss.prepare = 1;
1717 mutex_unlock(&runtime->oss.params_lock);
1718 }
1719
1720 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1721 if (substream != NULL) {
1722 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1723 return err;
1724 runtime = substream->runtime;
1725 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1726 if (err < 0)
1727 return err;
1728 mutex_lock(&runtime->oss.params_lock);
1729 runtime->oss.buffer_used = 0;
1730 runtime->oss.prepare = 1;
1731 mutex_unlock(&runtime->oss.params_lock);
1732 }
1733 return 0;
1734 }
1735
1736 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1737 {
1738 int idx;
1739
1740 for (idx = 1; idx >= 0; --idx) {
1741 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1742 struct snd_pcm_runtime *runtime;
1743 int err;
1744
1745 if (substream == NULL)
1746 continue;
1747 runtime = substream->runtime;
1748 if (rate < 1000)
1749 rate = 1000;
1750 else if (rate > 192000)
1751 rate = 192000;
1752 err = lock_params(runtime);
1753 if (err < 0)
1754 return err;
1755 if (runtime->oss.rate != rate) {
1756 runtime->oss.params = 1;
1757 runtime->oss.rate = rate;
1758 }
1759 unlock_params(runtime);
1760 }
1761 return snd_pcm_oss_get_rate(pcm_oss_file);
1762 }
1763
1764 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1765 {
1766 struct snd_pcm_substream *substream;
1767 int err;
1768
1769 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1770 return err;
1771 return substream->runtime->oss.rate;
1772 }
1773
1774 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1775 {
1776 int idx;
1777 if (channels < 1)
1778 channels = 1;
1779 if (channels > 128)
1780 return -EINVAL;
1781 for (idx = 1; idx >= 0; --idx) {
1782 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1783 struct snd_pcm_runtime *runtime;
1784 int err;
1785
1786 if (substream == NULL)
1787 continue;
1788 runtime = substream->runtime;
1789 err = lock_params(runtime);
1790 if (err < 0)
1791 return err;
1792 if (runtime->oss.channels != channels) {
1793 runtime->oss.params = 1;
1794 runtime->oss.channels = channels;
1795 }
1796 unlock_params(runtime);
1797 }
1798 return snd_pcm_oss_get_channels(pcm_oss_file);
1799 }
1800
1801 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1802 {
1803 struct snd_pcm_substream *substream;
1804 int err;
1805
1806 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1807 return err;
1808 return substream->runtime->oss.channels;
1809 }
1810
1811 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1812 {
1813 struct snd_pcm_substream *substream;
1814 int err;
1815
1816 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1817 return err;
1818 return substream->runtime->oss.period_bytes;
1819 }
1820
1821 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1822 {
1823 struct snd_pcm_substream *substream;
1824 int err;
1825 int direct;
1826 struct snd_pcm_hw_params *params;
1827 unsigned int formats = 0;
1828 const struct snd_mask *format_mask;
1829 int fmt;
1830
1831 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1832 return err;
1833 if (atomic_read(&substream->mmap_count))
1834 direct = 1;
1835 else
1836 direct = substream->oss.setup.direct;
1837 if (!direct)
1838 return AFMT_MU_LAW | AFMT_U8 |
1839 AFMT_S16_LE | AFMT_S16_BE |
1840 AFMT_S8 | AFMT_U16_LE |
1841 AFMT_U16_BE |
1842 AFMT_S32_LE | AFMT_S32_BE |
1843 AFMT_S24_LE | AFMT_S24_BE |
1844 AFMT_S24_PACKED;
1845 params = kmalloc(sizeof(*params), GFP_KERNEL);
1846 if (!params)
1847 return -ENOMEM;
1848 _snd_pcm_hw_params_any(params);
1849 err = snd_pcm_hw_refine(substream, params);
1850 if (err < 0)
1851 goto error;
1852 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1853 for (fmt = 0; fmt < 32; ++fmt) {
1854 if (snd_mask_test(format_mask, fmt)) {
1855 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1856 if (f >= 0)
1857 formats |= f;
1858 }
1859 }
1860
1861 error:
1862 kfree(params);
1863 return err < 0 ? err : formats;
1864 }
1865
1866 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1867 {
1868 int formats, idx;
1869 int err;
1870
1871 if (format != AFMT_QUERY) {
1872 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1873 if (formats < 0)
1874 return formats;
1875 if (!(formats & format))
1876 format = AFMT_U8;
1877 for (idx = 1; idx >= 0; --idx) {
1878 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1879 struct snd_pcm_runtime *runtime;
1880 if (substream == NULL)
1881 continue;
1882 runtime = substream->runtime;
1883 err = lock_params(runtime);
1884 if (err < 0)
1885 return err;
1886 if (runtime->oss.format != format) {
1887 runtime->oss.params = 1;
1888 runtime->oss.format = format;
1889 }
1890 unlock_params(runtime);
1891 }
1892 }
1893 return snd_pcm_oss_get_format(pcm_oss_file);
1894 }
1895
1896 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1897 {
1898 struct snd_pcm_substream *substream;
1899 int err;
1900
1901 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1902 return err;
1903 return substream->runtime->oss.format;
1904 }
1905
1906 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1907 {
1908 struct snd_pcm_runtime *runtime;
1909
1910 runtime = substream->runtime;
1911 if (subdivide == 0) {
1912 subdivide = runtime->oss.subdivision;
1913 if (subdivide == 0)
1914 subdivide = 1;
1915 return subdivide;
1916 }
1917 if (runtime->oss.subdivision || runtime->oss.fragshift)
1918 return -EINVAL;
1919 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1920 subdivide != 8 && subdivide != 16)
1921 return -EINVAL;
1922 runtime->oss.subdivision = subdivide;
1923 runtime->oss.params = 1;
1924 return subdivide;
1925 }
1926
1927 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1928 {
1929 int err = -EINVAL, idx;
1930
1931 for (idx = 1; idx >= 0; --idx) {
1932 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1933 struct snd_pcm_runtime *runtime;
1934
1935 if (substream == NULL)
1936 continue;
1937 runtime = substream->runtime;
1938 err = lock_params(runtime);
1939 if (err < 0)
1940 return err;
1941 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1942 unlock_params(runtime);
1943 if (err < 0)
1944 return err;
1945 }
1946 return err;
1947 }
1948
1949 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1950 {
1951 struct snd_pcm_runtime *runtime;
1952
1953 runtime = substream->runtime;
1954 if (runtime->oss.subdivision || runtime->oss.fragshift)
1955 return -EINVAL;
1956 runtime->oss.fragshift = val & 0xffff;
1957 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1958 if (runtime->oss.fragshift < 4) /* < 16 */
1959 runtime->oss.fragshift = 4;
1960 if (runtime->oss.maxfrags < 2)
1961 runtime->oss.maxfrags = 2;
1962 runtime->oss.params = 1;
1963 return 0;
1964 }
1965
1966 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1967 {
1968 int err = -EINVAL, idx;
1969
1970 for (idx = 1; idx >= 0; --idx) {
1971 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1972 struct snd_pcm_runtime *runtime;
1973
1974 if (substream == NULL)
1975 continue;
1976 runtime = substream->runtime;
1977 err = lock_params(runtime);
1978 if (err < 0)
1979 return err;
1980 err = snd_pcm_oss_set_fragment1(substream, val);
1981 unlock_params(runtime);
1982 if (err < 0)
1983 return err;
1984 }
1985 return err;
1986 }
1987
1988 static int snd_pcm_oss_nonblock(struct file * file)
1989 {
1990 spin_lock(&file->f_lock);
1991 file->f_flags |= O_NONBLOCK;
1992 spin_unlock(&file->f_lock);
1993 return 0;
1994 }
1995
1996 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1997 {
1998
1999 if (substream == NULL) {
2000 res &= ~DSP_CAP_DUPLEX;
2001 return res;
2002 }
2003 #ifdef DSP_CAP_MULTI
2004 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2005 if (substream->pstr->substream_count > 1)
2006 res |= DSP_CAP_MULTI;
2007 #endif
2008 /* DSP_CAP_REALTIME is set all times: */
2009 /* all ALSA drivers can return actual pointer in ring buffer */
2010 #if defined(DSP_CAP_REALTIME) && 0
2011 {
2012 struct snd_pcm_runtime *runtime = substream->runtime;
2013 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2014 res &= ~DSP_CAP_REALTIME;
2015 }
2016 #endif
2017 return res;
2018 }
2019
2020 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2021 {
2022 int result, idx;
2023
2024 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2025 for (idx = 0; idx < 2; idx++) {
2026 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2027 result = snd_pcm_oss_get_caps1(substream, result);
2028 }
2029 result |= 0x0001; /* revision - same as SB AWE 64 */
2030 return result;
2031 }
2032
2033 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2034 snd_pcm_uframes_t hw_ptr)
2035 {
2036 struct snd_pcm_runtime *runtime = substream->runtime;
2037 snd_pcm_uframes_t appl_ptr;
2038 appl_ptr = hw_ptr + runtime->buffer_size;
2039 appl_ptr %= runtime->boundary;
2040 runtime->control->appl_ptr = appl_ptr;
2041 }
2042
2043 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2044 {
2045 struct snd_pcm_runtime *runtime;
2046 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2047 int err, cmd;
2048
2049 #ifdef OSS_DEBUG
2050 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
2051 #endif
2052
2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2055
2056 if (psubstream) {
2057 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2058 return err;
2059 }
2060 if (csubstream) {
2061 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2062 return err;
2063 }
2064 if (psubstream) {
2065 runtime = psubstream->runtime;
2066 cmd = 0;
2067 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2068 return -ERESTARTSYS;
2069 if (trigger & PCM_ENABLE_OUTPUT) {
2070 if (runtime->oss.trigger)
2071 goto _skip1;
2072 if (atomic_read(&psubstream->mmap_count))
2073 snd_pcm_oss_simulate_fill(psubstream,
2074 get_hw_ptr_period(runtime));
2075 runtime->oss.trigger = 1;
2076 runtime->start_threshold = 1;
2077 cmd = SNDRV_PCM_IOCTL_START;
2078 } else {
2079 if (!runtime->oss.trigger)
2080 goto _skip1;
2081 runtime->oss.trigger = 0;
2082 runtime->start_threshold = runtime->boundary;
2083 cmd = SNDRV_PCM_IOCTL_DROP;
2084 runtime->oss.prepare = 1;
2085 }
2086 _skip1:
2087 mutex_unlock(&runtime->oss.params_lock);
2088 if (cmd) {
2089 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2090 if (err < 0)
2091 return err;
2092 }
2093 }
2094 if (csubstream) {
2095 runtime = csubstream->runtime;
2096 cmd = 0;
2097 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2098 return -ERESTARTSYS;
2099 if (trigger & PCM_ENABLE_INPUT) {
2100 if (runtime->oss.trigger)
2101 goto _skip2;
2102 runtime->oss.trigger = 1;
2103 runtime->start_threshold = 1;
2104 cmd = SNDRV_PCM_IOCTL_START;
2105 } else {
2106 if (!runtime->oss.trigger)
2107 goto _skip2;
2108 runtime->oss.trigger = 0;
2109 runtime->start_threshold = runtime->boundary;
2110 cmd = SNDRV_PCM_IOCTL_DROP;
2111 runtime->oss.prepare = 1;
2112 }
2113 _skip2:
2114 mutex_unlock(&runtime->oss.params_lock);
2115 if (cmd) {
2116 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2117 if (err < 0)
2118 return err;
2119 }
2120 }
2121 return 0;
2122 }
2123
2124 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2125 {
2126 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2127 int result = 0;
2128
2129 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2130 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2131 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2132 result |= PCM_ENABLE_OUTPUT;
2133 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2134 result |= PCM_ENABLE_INPUT;
2135 return result;
2136 }
2137
2138 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2139 {
2140 struct snd_pcm_substream *substream;
2141 struct snd_pcm_runtime *runtime;
2142 snd_pcm_sframes_t delay;
2143 int err;
2144
2145 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2146 if (substream == NULL)
2147 return -EINVAL;
2148 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2149 return err;
2150 runtime = substream->runtime;
2151 if (runtime->oss.params || runtime->oss.prepare)
2152 return 0;
2153 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2154 if (err == -EPIPE)
2155 delay = 0; /* hack for broken OSS applications */
2156 else if (err < 0)
2157 return err;
2158 return snd_pcm_oss_bytes(substream, delay);
2159 }
2160
2161 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2162 {
2163 struct snd_pcm_substream *substream;
2164 struct snd_pcm_runtime *runtime;
2165 snd_pcm_sframes_t delay;
2166 int fixup;
2167 struct count_info info;
2168 int err;
2169
2170 if (_info == NULL)
2171 return -EFAULT;
2172 substream = pcm_oss_file->streams[stream];
2173 if (substream == NULL)
2174 return -EINVAL;
2175 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2176 return err;
2177 runtime = substream->runtime;
2178 if (runtime->oss.params || runtime->oss.prepare) {
2179 memset(&info, 0, sizeof(info));
2180 if (copy_to_user(_info, &info, sizeof(info)))
2181 return -EFAULT;
2182 return 0;
2183 }
2184 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2185 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2186 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2187 err = 0;
2188 delay = 0;
2189 fixup = 0;
2190 } else {
2191 fixup = runtime->oss.buffer_used;
2192 }
2193 } else {
2194 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2195 fixup = -runtime->oss.buffer_used;
2196 }
2197 if (err < 0)
2198 return err;
2199 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2200 if (atomic_read(&substream->mmap_count)) {
2201 snd_pcm_sframes_t n;
2202 delay = get_hw_ptr_period(runtime);
2203 n = delay - runtime->oss.prev_hw_ptr_period;
2204 if (n < 0)
2205 n += runtime->boundary;
2206 info.blocks = n / runtime->period_size;
2207 runtime->oss.prev_hw_ptr_period = delay;
2208 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2209 snd_pcm_oss_simulate_fill(substream, delay);
2210 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2211 } else {
2212 delay = snd_pcm_oss_bytes(substream, delay);
2213 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2214 if (substream->oss.setup.buggyptr)
2215 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2216 else
2217 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2218 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2219 } else {
2220 delay += fixup;
2221 info.blocks = delay / runtime->oss.period_bytes;
2222 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2223 }
2224 }
2225 if (copy_to_user(_info, &info, sizeof(info)))
2226 return -EFAULT;
2227 return 0;
2228 }
2229
2230 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2231 {
2232 struct snd_pcm_substream *substream;
2233 struct snd_pcm_runtime *runtime;
2234 snd_pcm_sframes_t avail;
2235 int fixup;
2236 struct audio_buf_info info;
2237 int err;
2238
2239 if (_info == NULL)
2240 return -EFAULT;
2241 substream = pcm_oss_file->streams[stream];
2242 if (substream == NULL)
2243 return -EINVAL;
2244 runtime = substream->runtime;
2245
2246 if (runtime->oss.params &&
2247 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2248 return err;
2249
2250 info.fragsize = runtime->oss.period_bytes;
2251 info.fragstotal = runtime->periods;
2252 if (runtime->oss.prepare) {
2253 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2254 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2255 info.fragments = runtime->oss.periods;
2256 } else {
2257 info.bytes = 0;
2258 info.fragments = 0;
2259 }
2260 } else {
2261 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2262 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2263 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2264 avail = runtime->buffer_size;
2265 err = 0;
2266 fixup = 0;
2267 } else {
2268 avail = runtime->buffer_size - avail;
2269 fixup = -runtime->oss.buffer_used;
2270 }
2271 } else {
2272 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2273 fixup = runtime->oss.buffer_used;
2274 }
2275 if (err < 0)
2276 return err;
2277 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2278 info.fragments = info.bytes / runtime->oss.period_bytes;
2279 }
2280
2281 #ifdef OSS_DEBUG
2282 pcm_dbg(substream->pcm,
2283 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2284 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2285 #endif
2286 if (copy_to_user(_info, &info, sizeof(info)))
2287 return -EFAULT;
2288 return 0;
2289 }
2290
2291 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2292 {
2293 // it won't be probably implemented
2294 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2295 return -EINVAL;
2296 }
2297
2298 static const char *strip_task_path(const char *path)
2299 {
2300 const char *ptr, *ptrl = NULL;
2301 for (ptr = path; *ptr; ptr++) {
2302 if (*ptr == '/')
2303 ptrl = ptr + 1;
2304 }
2305 return ptrl;
2306 }
2307
2308 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2309 const char *task_name,
2310 struct snd_pcm_oss_setup *rsetup)
2311 {
2312 struct snd_pcm_oss_setup *setup;
2313
2314 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2315 do {
2316 for (setup = pcm->streams[stream].oss.setup_list; setup;
2317 setup = setup->next) {
2318 if (!strcmp(setup->task_name, task_name))
2319 goto out;
2320 }
2321 } while ((task_name = strip_task_path(task_name)) != NULL);
2322 out:
2323 if (setup)
2324 *rsetup = *setup;
2325 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2326 }
2327
2328 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2329 {
2330 struct snd_pcm_runtime *runtime;
2331 runtime = substream->runtime;
2332 kvfree(runtime->oss.buffer);
2333 runtime->oss.buffer = NULL;
2334 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2335 snd_pcm_oss_plugin_clear(substream);
2336 #endif
2337 substream->oss.oss = 0;
2338 }
2339
2340 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2341 struct snd_pcm_oss_setup *setup,
2342 int minor)
2343 {
2344 struct snd_pcm_runtime *runtime;
2345
2346 substream->oss.oss = 1;
2347 substream->oss.setup = *setup;
2348 if (setup->nonblock)
2349 substream->f_flags |= O_NONBLOCK;
2350 else if (setup->block)
2351 substream->f_flags &= ~O_NONBLOCK;
2352 runtime = substream->runtime;
2353 runtime->oss.params = 1;
2354 runtime->oss.trigger = 1;
2355 runtime->oss.rate = 8000;
2356 mutex_init(&runtime->oss.params_lock);
2357 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2358 case SNDRV_MINOR_OSS_PCM_8:
2359 runtime->oss.format = AFMT_U8;
2360 break;
2361 case SNDRV_MINOR_OSS_PCM_16:
2362 runtime->oss.format = AFMT_S16_LE;
2363 break;
2364 default:
2365 runtime->oss.format = AFMT_MU_LAW;
2366 }
2367 runtime->oss.channels = 1;
2368 runtime->oss.fragshift = 0;
2369 runtime->oss.maxfrags = 0;
2370 runtime->oss.subdivision = 0;
2371 substream->pcm_release = snd_pcm_oss_release_substream;
2372 atomic_set(&runtime->oss.rw_ref, 0);
2373 }
2374
2375 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2376 {
2377 int cidx;
2378 if (!pcm_oss_file)
2379 return 0;
2380 for (cidx = 0; cidx < 2; ++cidx) {
2381 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2382 if (substream)
2383 snd_pcm_release_substream(substream);
2384 }
2385 kfree(pcm_oss_file);
2386 return 0;
2387 }
2388
2389 static int snd_pcm_oss_open_file(struct file *file,
2390 struct snd_pcm *pcm,
2391 struct snd_pcm_oss_file **rpcm_oss_file,
2392 int minor,
2393 struct snd_pcm_oss_setup *setup)
2394 {
2395 int idx, err;
2396 struct snd_pcm_oss_file *pcm_oss_file;
2397 struct snd_pcm_substream *substream;
2398 fmode_t f_mode = file->f_mode;
2399
2400 if (rpcm_oss_file)
2401 *rpcm_oss_file = NULL;
2402
2403 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2404 if (pcm_oss_file == NULL)
2405 return -ENOMEM;
2406
2407 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2408 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2409 f_mode = FMODE_WRITE;
2410
2411 file->f_flags &= ~O_APPEND;
2412 for (idx = 0; idx < 2; idx++) {
2413 if (setup[idx].disable)
2414 continue;
2415 if (! pcm->streams[idx].substream_count)
2416 continue; /* no matching substream */
2417 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2418 if (! (f_mode & FMODE_WRITE))
2419 continue;
2420 } else {
2421 if (! (f_mode & FMODE_READ))
2422 continue;
2423 }
2424 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2425 if (err < 0) {
2426 snd_pcm_oss_release_file(pcm_oss_file);
2427 return err;
2428 }
2429
2430 pcm_oss_file->streams[idx] = substream;
2431 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2432 }
2433
2434 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2435 snd_pcm_oss_release_file(pcm_oss_file);
2436 return -EINVAL;
2437 }
2438
2439 file->private_data = pcm_oss_file;
2440 if (rpcm_oss_file)
2441 *rpcm_oss_file = pcm_oss_file;
2442 return 0;
2443 }
2444
2445
2446 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2447 {
2448 unsigned int idx;
2449
2450 if (snd_BUG_ON(!task || !name || size < 2))
2451 return -EINVAL;
2452 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2453 name[idx] = task->comm[idx];
2454 name[idx] = '\0';
2455 return 0;
2456 }
2457
2458 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2459 {
2460 int err;
2461 char task_name[32];
2462 struct snd_pcm *pcm;
2463 struct snd_pcm_oss_file *pcm_oss_file;
2464 struct snd_pcm_oss_setup setup[2];
2465 int nonblock;
2466 wait_queue_entry_t wait;
2467
2468 err = nonseekable_open(inode, file);
2469 if (err < 0)
2470 return err;
2471
2472 pcm = snd_lookup_oss_minor_data(iminor(inode),
2473 SNDRV_OSS_DEVICE_TYPE_PCM);
2474 if (pcm == NULL) {
2475 err = -ENODEV;
2476 goto __error1;
2477 }
2478 err = snd_card_file_add(pcm->card, file);
2479 if (err < 0)
2480 goto __error1;
2481 if (!try_module_get(pcm->card->module)) {
2482 err = -EFAULT;
2483 goto __error2;
2484 }
2485 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2486 err = -EFAULT;
2487 goto __error;
2488 }
2489 memset(setup, 0, sizeof(setup));
2490 if (file->f_mode & FMODE_WRITE)
2491 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2492 task_name, &setup[0]);
2493 if (file->f_mode & FMODE_READ)
2494 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2495 task_name, &setup[1]);
2496
2497 nonblock = !!(file->f_flags & O_NONBLOCK);
2498 if (!nonblock)
2499 nonblock = nonblock_open;
2500
2501 init_waitqueue_entry(&wait, current);
2502 add_wait_queue(&pcm->open_wait, &wait);
2503 mutex_lock(&pcm->open_mutex);
2504 while (1) {
2505 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2506 iminor(inode), setup);
2507 if (err >= 0)
2508 break;
2509 if (err == -EAGAIN) {
2510 if (nonblock) {
2511 err = -EBUSY;
2512 break;
2513 }
2514 } else
2515 break;
2516 set_current_state(TASK_INTERRUPTIBLE);
2517 mutex_unlock(&pcm->open_mutex);
2518 schedule();
2519 mutex_lock(&pcm->open_mutex);
2520 if (pcm->card->shutdown) {
2521 err = -ENODEV;
2522 break;
2523 }
2524 if (signal_pending(current)) {
2525 err = -ERESTARTSYS;
2526 break;
2527 }
2528 }
2529 remove_wait_queue(&pcm->open_wait, &wait);
2530 mutex_unlock(&pcm->open_mutex);
2531 if (err < 0)
2532 goto __error;
2533 snd_card_unref(pcm->card);
2534 return err;
2535
2536 __error:
2537 module_put(pcm->card->module);
2538 __error2:
2539 snd_card_file_remove(pcm->card, file);
2540 __error1:
2541 if (pcm)
2542 snd_card_unref(pcm->card);
2543 return err;
2544 }
2545
2546 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2547 {
2548 struct snd_pcm *pcm;
2549 struct snd_pcm_substream *substream;
2550 struct snd_pcm_oss_file *pcm_oss_file;
2551
2552 pcm_oss_file = file->private_data;
2553 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2554 if (substream == NULL)
2555 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2556 if (snd_BUG_ON(!substream))
2557 return -ENXIO;
2558 pcm = substream->pcm;
2559 if (!pcm->card->shutdown)
2560 snd_pcm_oss_sync(pcm_oss_file);
2561 mutex_lock(&pcm->open_mutex);
2562 snd_pcm_oss_release_file(pcm_oss_file);
2563 mutex_unlock(&pcm->open_mutex);
2564 wake_up(&pcm->open_wait);
2565 module_put(pcm->card->module);
2566 snd_card_file_remove(pcm->card, file);
2567 return 0;
2568 }
2569
2570 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2571 {
2572 struct snd_pcm_oss_file *pcm_oss_file;
2573 int __user *p = (int __user *)arg;
2574 int res;
2575
2576 pcm_oss_file = file->private_data;
2577 if (cmd == OSS_GETVERSION)
2578 return put_user(SNDRV_OSS_VERSION, p);
2579 if (cmd == OSS_ALSAEMULVER)
2580 return put_user(1, p);
2581 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2582 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2583 struct snd_pcm_substream *substream;
2584 int idx;
2585 for (idx = 0; idx < 2; ++idx) {
2586 substream = pcm_oss_file->streams[idx];
2587 if (substream != NULL)
2588 break;
2589 }
2590 if (snd_BUG_ON(idx >= 2))
2591 return -ENXIO;
2592 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2593 }
2594 #endif
2595 if (((cmd >> 8) & 0xff) != 'P')
2596 return -EINVAL;
2597 #ifdef OSS_DEBUG
2598 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2599 #endif
2600 switch (cmd) {
2601 case SNDCTL_DSP_RESET:
2602 return snd_pcm_oss_reset(pcm_oss_file);
2603 case SNDCTL_DSP_SYNC:
2604 return snd_pcm_oss_sync(pcm_oss_file);
2605 case SNDCTL_DSP_SPEED:
2606 if (get_user(res, p))
2607 return -EFAULT;
2608 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2609 return res;
2610 return put_user(res, p);
2611 case SOUND_PCM_READ_RATE:
2612 res = snd_pcm_oss_get_rate(pcm_oss_file);
2613 if (res < 0)
2614 return res;
2615 return put_user(res, p);
2616 case SNDCTL_DSP_STEREO:
2617 if (get_user(res, p))
2618 return -EFAULT;
2619 res = res > 0 ? 2 : 1;
2620 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2621 return res;
2622 return put_user(--res, p);
2623 case SNDCTL_DSP_GETBLKSIZE:
2624 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2625 if (res < 0)
2626 return res;
2627 return put_user(res, p);
2628 case SNDCTL_DSP_SETFMT:
2629 if (get_user(res, p))
2630 return -EFAULT;
2631 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2632 if (res < 0)
2633 return res;
2634 return put_user(res, p);
2635 case SOUND_PCM_READ_BITS:
2636 res = snd_pcm_oss_get_format(pcm_oss_file);
2637 if (res < 0)
2638 return res;
2639 return put_user(res, p);
2640 case SNDCTL_DSP_CHANNELS:
2641 if (get_user(res, p))
2642 return -EFAULT;
2643 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2644 if (res < 0)
2645 return res;
2646 return put_user(res, p);
2647 case SOUND_PCM_READ_CHANNELS:
2648 res = snd_pcm_oss_get_channels(pcm_oss_file);
2649 if (res < 0)
2650 return res;
2651 return put_user(res, p);
2652 case SOUND_PCM_WRITE_FILTER:
2653 case SOUND_PCM_READ_FILTER:
2654 return -EIO;
2655 case SNDCTL_DSP_POST:
2656 return snd_pcm_oss_post(pcm_oss_file);
2657 case SNDCTL_DSP_SUBDIVIDE:
2658 if (get_user(res, p))
2659 return -EFAULT;
2660 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2661 if (res < 0)
2662 return res;
2663 return put_user(res, p);
2664 case SNDCTL_DSP_SETFRAGMENT:
2665 if (get_user(res, p))
2666 return -EFAULT;
2667 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2668 case SNDCTL_DSP_GETFMTS:
2669 res = snd_pcm_oss_get_formats(pcm_oss_file);
2670 if (res < 0)
2671 return res;
2672 return put_user(res, p);
2673 case SNDCTL_DSP_GETOSPACE:
2674 case SNDCTL_DSP_GETISPACE:
2675 return snd_pcm_oss_get_space(pcm_oss_file,
2676 cmd == SNDCTL_DSP_GETISPACE ?
2677 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2678 (struct audio_buf_info __user *) arg);
2679 case SNDCTL_DSP_NONBLOCK:
2680 return snd_pcm_oss_nonblock(file);
2681 case SNDCTL_DSP_GETCAPS:
2682 res = snd_pcm_oss_get_caps(pcm_oss_file);
2683 if (res < 0)
2684 return res;
2685 return put_user(res, p);
2686 case SNDCTL_DSP_GETTRIGGER:
2687 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2688 if (res < 0)
2689 return res;
2690 return put_user(res, p);
2691 case SNDCTL_DSP_SETTRIGGER:
2692 if (get_user(res, p))
2693 return -EFAULT;
2694 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2695 case SNDCTL_DSP_GETIPTR:
2696 case SNDCTL_DSP_GETOPTR:
2697 return snd_pcm_oss_get_ptr(pcm_oss_file,
2698 cmd == SNDCTL_DSP_GETIPTR ?
2699 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2700 (struct count_info __user *) arg);
2701 case SNDCTL_DSP_MAPINBUF:
2702 case SNDCTL_DSP_MAPOUTBUF:
2703 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2704 cmd == SNDCTL_DSP_MAPINBUF ?
2705 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2706 (struct buffmem_desc __user *) arg);
2707 case SNDCTL_DSP_SETSYNCRO:
2708 /* stop DMA now.. */
2709 return 0;
2710 case SNDCTL_DSP_SETDUPLEX:
2711 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2712 return 0;
2713 return -EIO;
2714 case SNDCTL_DSP_GETODELAY:
2715 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2716 if (res < 0) {
2717 /* it's for sure, some broken apps don't check for error codes */
2718 put_user(0, p);
2719 return res;
2720 }
2721 return put_user(res, p);
2722 case SNDCTL_DSP_PROFILE:
2723 return 0; /* silently ignore */
2724 default:
2725 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2726 }
2727 return -EINVAL;
2728 }
2729
2730 #ifdef CONFIG_COMPAT
2731 /* all compatible */
2732 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2733 unsigned long arg)
2734 {
2735 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2736 }
2737 #else
2738 #define snd_pcm_oss_ioctl_compat NULL
2739 #endif
2740
2741 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2742 {
2743 struct snd_pcm_oss_file *pcm_oss_file;
2744 struct snd_pcm_substream *substream;
2745
2746 pcm_oss_file = file->private_data;
2747 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2748 if (substream == NULL)
2749 return -ENXIO;
2750 substream->f_flags = file->f_flags & O_NONBLOCK;
2751 #ifndef OSS_DEBUG
2752 return snd_pcm_oss_read1(substream, buf, count);
2753 #else
2754 {
2755 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2756 pcm_dbg(substream->pcm,
2757 "pcm_oss: read %li bytes (returned %li bytes)\n",
2758 (long)count, (long)res);
2759 return res;
2760 }
2761 #endif
2762 }
2763
2764 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2765 {
2766 struct snd_pcm_oss_file *pcm_oss_file;
2767 struct snd_pcm_substream *substream;
2768 long result;
2769
2770 pcm_oss_file = file->private_data;
2771 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2772 if (substream == NULL)
2773 return -ENXIO;
2774 substream->f_flags = file->f_flags & O_NONBLOCK;
2775 result = snd_pcm_oss_write1(substream, buf, count);
2776 #ifdef OSS_DEBUG
2777 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2778 (long)count, (long)result);
2779 #endif
2780 return result;
2781 }
2782
2783 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2784 {
2785 struct snd_pcm_runtime *runtime = substream->runtime;
2786 if (atomic_read(&substream->mmap_count))
2787 return runtime->oss.prev_hw_ptr_period !=
2788 get_hw_ptr_period(runtime);
2789 else
2790 return snd_pcm_playback_avail(runtime) >=
2791 runtime->oss.period_frames;
2792 }
2793
2794 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2795 {
2796 struct snd_pcm_runtime *runtime = substream->runtime;
2797 if (atomic_read(&substream->mmap_count))
2798 return runtime->oss.prev_hw_ptr_period !=
2799 get_hw_ptr_period(runtime);
2800 else
2801 return snd_pcm_capture_avail(runtime) >=
2802 runtime->oss.period_frames;
2803 }
2804
2805 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2806 {
2807 struct snd_pcm_oss_file *pcm_oss_file;
2808 __poll_t mask;
2809 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2810
2811 pcm_oss_file = file->private_data;
2812
2813 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2814 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2815
2816 mask = 0;
2817 if (psubstream != NULL) {
2818 struct snd_pcm_runtime *runtime = psubstream->runtime;
2819 poll_wait(file, &runtime->sleep, wait);
2820 snd_pcm_stream_lock_irq(psubstream);
2821 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2822 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2823 snd_pcm_oss_playback_ready(psubstream)))
2824 mask |= EPOLLOUT | EPOLLWRNORM;
2825 snd_pcm_stream_unlock_irq(psubstream);
2826 }
2827 if (csubstream != NULL) {
2828 struct snd_pcm_runtime *runtime = csubstream->runtime;
2829 snd_pcm_state_t ostate;
2830 poll_wait(file, &runtime->sleep, wait);
2831 snd_pcm_stream_lock_irq(csubstream);
2832 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2833 snd_pcm_oss_capture_ready(csubstream))
2834 mask |= EPOLLIN | EPOLLRDNORM;
2835 snd_pcm_stream_unlock_irq(csubstream);
2836 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2837 struct snd_pcm_oss_file ofile;
2838 memset(&ofile, 0, sizeof(ofile));
2839 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2840 runtime->oss.trigger = 0;
2841 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2842 }
2843 }
2844
2845 return mask;
2846 }
2847
2848 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2849 {
2850 struct snd_pcm_oss_file *pcm_oss_file;
2851 struct snd_pcm_substream *substream = NULL;
2852 struct snd_pcm_runtime *runtime;
2853 int err;
2854
2855 #ifdef OSS_DEBUG
2856 pr_debug("pcm_oss: mmap begin\n");
2857 #endif
2858 pcm_oss_file = file->private_data;
2859 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2860 case VM_READ | VM_WRITE:
2861 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2862 if (substream)
2863 break;
2864 /* Fall through */
2865 case VM_READ:
2866 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2867 break;
2868 case VM_WRITE:
2869 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2870 break;
2871 default:
2872 return -EINVAL;
2873 }
2874 /* set VM_READ access as well to fix memset() routines that do
2875 reads before writes (to improve performance) */
2876 area->vm_flags |= VM_READ;
2877 if (substream == NULL)
2878 return -ENXIO;
2879 runtime = substream->runtime;
2880 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2881 return -EIO;
2882 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2883 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2884 else
2885 return -EIO;
2886
2887 if (runtime->oss.params) {
2888 /* use mutex_trylock() for params_lock for avoiding a deadlock
2889 * between mmap_sem and params_lock taken by
2890 * copy_from/to_user() in snd_pcm_oss_write/read()
2891 */
2892 err = snd_pcm_oss_change_params(substream, true);
2893 if (err < 0)
2894 return err;
2895 }
2896 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2897 if (runtime->oss.plugin_first != NULL)
2898 return -EIO;
2899 #endif
2900
2901 if (area->vm_pgoff != 0)
2902 return -EINVAL;
2903
2904 err = snd_pcm_mmap_data(substream, file, area);
2905 if (err < 0)
2906 return err;
2907 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2908 runtime->silence_threshold = 0;
2909 runtime->silence_size = 0;
2910 #ifdef OSS_DEBUG
2911 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2912 runtime->oss.mmap_bytes);
2913 #endif
2914 /* In mmap mode we never stop */
2915 runtime->stop_threshold = runtime->boundary;
2916
2917 return 0;
2918 }
2919
2920 #ifdef CONFIG_SND_VERBOSE_PROCFS
2921 /*
2922 * /proc interface
2923 */
2924
2925 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2926 struct snd_info_buffer *buffer)
2927 {
2928 struct snd_pcm_str *pstr = entry->private_data;
2929 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2930 mutex_lock(&pstr->oss.setup_mutex);
2931 while (setup) {
2932 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2933 setup->task_name,
2934 setup->periods,
2935 setup->period_size,
2936 setup->disable ? " disable" : "",
2937 setup->direct ? " direct" : "",
2938 setup->block ? " block" : "",
2939 setup->nonblock ? " non-block" : "",
2940 setup->partialfrag ? " partial-frag" : "",
2941 setup->nosilence ? " no-silence" : "");
2942 setup = setup->next;
2943 }
2944 mutex_unlock(&pstr->oss.setup_mutex);
2945 }
2946
2947 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2948 {
2949 struct snd_pcm_oss_setup *setup, *setupn;
2950
2951 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2952 setup; setup = setupn) {
2953 setupn = setup->next;
2954 kfree(setup->task_name);
2955 kfree(setup);
2956 }
2957 pstr->oss.setup_list = NULL;
2958 }
2959
2960 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2961 struct snd_info_buffer *buffer)
2962 {
2963 struct snd_pcm_str *pstr = entry->private_data;
2964 char line[128], str[32], task_name[32];
2965 const char *ptr;
2966 int idx1;
2967 struct snd_pcm_oss_setup *setup, *setup1, template;
2968
2969 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2970 mutex_lock(&pstr->oss.setup_mutex);
2971 memset(&template, 0, sizeof(template));
2972 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2973 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2974 snd_pcm_oss_proc_free_setup_list(pstr);
2975 mutex_unlock(&pstr->oss.setup_mutex);
2976 continue;
2977 }
2978 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2979 if (!strcmp(setup->task_name, task_name)) {
2980 template = *setup;
2981 break;
2982 }
2983 }
2984 ptr = snd_info_get_str(str, ptr, sizeof(str));
2985 template.periods = simple_strtoul(str, NULL, 10);
2986 ptr = snd_info_get_str(str, ptr, sizeof(str));
2987 template.period_size = simple_strtoul(str, NULL, 10);
2988 for (idx1 = 31; idx1 >= 0; idx1--)
2989 if (template.period_size & (1 << idx1))
2990 break;
2991 for (idx1--; idx1 >= 0; idx1--)
2992 template.period_size &= ~(1 << idx1);
2993 do {
2994 ptr = snd_info_get_str(str, ptr, sizeof(str));
2995 if (!strcmp(str, "disable")) {
2996 template.disable = 1;
2997 } else if (!strcmp(str, "direct")) {
2998 template.direct = 1;
2999 } else if (!strcmp(str, "block")) {
3000 template.block = 1;
3001 } else if (!strcmp(str, "non-block")) {
3002 template.nonblock = 1;
3003 } else if (!strcmp(str, "partial-frag")) {
3004 template.partialfrag = 1;
3005 } else if (!strcmp(str, "no-silence")) {
3006 template.nosilence = 1;
3007 } else if (!strcmp(str, "buggy-ptr")) {
3008 template.buggyptr = 1;
3009 }
3010 } while (*str);
3011 if (setup == NULL) {
3012 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3013 if (! setup) {
3014 buffer->error = -ENOMEM;
3015 mutex_unlock(&pstr->oss.setup_mutex);
3016 return;
3017 }
3018 if (pstr->oss.setup_list == NULL)
3019 pstr->oss.setup_list = setup;
3020 else {
3021 for (setup1 = pstr->oss.setup_list;
3022 setup1->next; setup1 = setup1->next);
3023 setup1->next = setup;
3024 }
3025 template.task_name = kstrdup(task_name, GFP_KERNEL);
3026 if (! template.task_name) {
3027 kfree(setup);
3028 buffer->error = -ENOMEM;
3029 mutex_unlock(&pstr->oss.setup_mutex);
3030 return;
3031 }
3032 }
3033 *setup = template;
3034 mutex_unlock(&pstr->oss.setup_mutex);
3035 }
3036 }
3037
3038 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3039 {
3040 int stream;
3041 for (stream = 0; stream < 2; ++stream) {
3042 struct snd_info_entry *entry;
3043 struct snd_pcm_str *pstr = &pcm->streams[stream];
3044 if (pstr->substream_count == 0)
3045 continue;
3046 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3047 entry->content = SNDRV_INFO_CONTENT_TEXT;
3048 entry->mode = S_IFREG | 0644;
3049 entry->c.text.read = snd_pcm_oss_proc_read;
3050 entry->c.text.write = snd_pcm_oss_proc_write;
3051 entry->private_data = pstr;
3052 if (snd_info_register(entry) < 0) {
3053 snd_info_free_entry(entry);
3054 entry = NULL;
3055 }
3056 }
3057 pstr->oss.proc_entry = entry;
3058 }
3059 }
3060
3061 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3062 {
3063 int stream;
3064 for (stream = 0; stream < 2; ++stream) {
3065 struct snd_pcm_str *pstr = &pcm->streams[stream];
3066 snd_info_free_entry(pstr->oss.proc_entry);
3067 pstr->oss.proc_entry = NULL;
3068 snd_pcm_oss_proc_free_setup_list(pstr);
3069 }
3070 }
3071 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3072 #define snd_pcm_oss_proc_init(pcm)
3073 #define snd_pcm_oss_proc_done(pcm)
3074 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3075
3076 /*
3077 * ENTRY functions
3078 */
3079
3080 static const struct file_operations snd_pcm_oss_f_reg =
3081 {
3082 .owner = THIS_MODULE,
3083 .read = snd_pcm_oss_read,
3084 .write = snd_pcm_oss_write,
3085 .open = snd_pcm_oss_open,
3086 .release = snd_pcm_oss_release,
3087 .llseek = no_llseek,
3088 .poll = snd_pcm_oss_poll,
3089 .unlocked_ioctl = snd_pcm_oss_ioctl,
3090 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3091 .mmap = snd_pcm_oss_mmap,
3092 };
3093
3094 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3095 {
3096 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3097 pcm->card, index, &snd_pcm_oss_f_reg,
3098 pcm) < 0) {
3099 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3100 pcm->card->number, pcm->device);
3101 }
3102 }
3103
3104 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3105 {
3106 pcm->oss.reg = 0;
3107 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3108 char name[128];
3109 int duplex;
3110 register_oss_dsp(pcm, 0);
3111 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3112 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3113 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3114 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3115 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3116 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3117 pcm->card->number,
3118 name);
3119 #endif
3120 pcm->oss.reg++;
3121 pcm->oss.reg_mask |= 1;
3122 }
3123 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3124 register_oss_dsp(pcm, 1);
3125 pcm->oss.reg++;
3126 pcm->oss.reg_mask |= 2;
3127 }
3128
3129 if (pcm->oss.reg)
3130 snd_pcm_oss_proc_init(pcm);
3131
3132 return 0;
3133 }
3134
3135 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3136 {
3137 if (pcm->oss.reg) {
3138 if (pcm->oss.reg_mask & 1) {
3139 pcm->oss.reg_mask &= ~1;
3140 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3141 pcm->card, 0);
3142 }
3143 if (pcm->oss.reg_mask & 2) {
3144 pcm->oss.reg_mask &= ~2;
3145 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3146 pcm->card, 1);
3147 }
3148 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3149 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3150 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3151 #endif
3152 }
3153 pcm->oss.reg = 0;
3154 }
3155 return 0;
3156 }
3157
3158 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3159 {
3160 snd_pcm_oss_disconnect_minor(pcm);
3161 snd_pcm_oss_proc_done(pcm);
3162 return 0;
3163 }
3164
3165 static struct snd_pcm_notify snd_pcm_oss_notify =
3166 {
3167 .n_register = snd_pcm_oss_register_minor,
3168 .n_disconnect = snd_pcm_oss_disconnect_minor,
3169 .n_unregister = snd_pcm_oss_unregister_minor,
3170 };
3171
3172 static int __init alsa_pcm_oss_init(void)
3173 {
3174 int i;
3175 int err;
3176
3177 /* check device map table */
3178 for (i = 0; i < SNDRV_CARDS; i++) {
3179 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3180 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3181 i, dsp_map[i]);
3182 dsp_map[i] = 0;
3183 }
3184 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3185 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3186 i, adsp_map[i]);
3187 adsp_map[i] = 1;
3188 }
3189 }
3190 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3191 return err;
3192 return 0;
3193 }
3194
3195 static void __exit alsa_pcm_oss_exit(void)
3196 {
3197 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3198 }
3199
3200 module_init(alsa_pcm_oss_init)
3201 module_exit(alsa_pcm_oss_exit)
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