1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/module.h>
34 #include <linux/math64.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44 #include <sound/mixer_oss.h>
45
46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
48 static int dsp_map[SNDRV_CARDS];
49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50 static bool nonblock_open = 1;
51
52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54 MODULE_LICENSE("GPL");
55 module_param_array(dsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57 module_param_array(adsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59 module_param(nonblock_open, bool, 0644);
60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
snd_enter_user(void)68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
snd_leave_user(mm_segment_t fs)75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 /*
81 * helper functions to process hw_params
82 */
snd_interval_refine_min(struct snd_interval * i,unsigned int min,int openmin)83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84 {
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105 }
106
snd_interval_refine_max(struct snd_interval * i,unsigned int max,int openmax)107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108 {
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129 }
130
snd_interval_refine_set(struct snd_interval * i,unsigned int val)131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132 {
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139 }
140
141 /**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149 static unsigned int
snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,int * dir)150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152 {
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165 }
166
167 /**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175 static unsigned int
snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,int * dir)176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178 {
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191 }
192
_snd_pcm_hw_param_mask(struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,const struct snd_mask * val)193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196 {
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204 }
205
snd_pcm_hw_param_mask(struct snd_pcm_substream * pcm,struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,const struct snd_mask * val)206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210 {
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220 }
221
_snd_pcm_hw_param_min(struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,unsigned int val,int dir)222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225 {
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251 }
252
253 /**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
snd_pcm_hw_param_min(struct snd_pcm_substream * pcm,struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,unsigned int val,int * dir)265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269 {
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279 }
280
_snd_pcm_hw_param_max(struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,unsigned int val,int dir)281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284 {
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312 }
313
314 /**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
snd_pcm_hw_param_max(struct snd_pcm_substream * pcm,struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,unsigned int val,int * dir)326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330 {
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340 }
341
boundary_sub(int a,int adir,int b,int bdir,int * c,int * cdir)342 static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345 {
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356 }
357
boundary_lt(unsigned int a,int adir,unsigned int b,int bdir)358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360 {
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372 }
373
374 /* Return 1 if min is nearer to best than max */
boundary_nearer(int min,int mindir,int best,int bestdir,int max,int maxdir)375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378 {
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384 }
385
386 /**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
snd_pcm_hw_param_near(struct snd_pcm_substream * pcm,struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,unsigned int best,int * dir)400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404 {
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 if (max < 0) {
457 kfree(save);
458 return max;
459 }
460 last = 1;
461 }
462 _end:
463 kfree(save);
464 if (last)
465 v = snd_pcm_hw_param_last(pcm, params, var, dir);
466 else
467 v = snd_pcm_hw_param_first(pcm, params, var, dir);
468 snd_BUG_ON(v < 0);
469 return v;
470 }
471
_snd_pcm_hw_param_set(struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,unsigned int val,int dir)472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473 snd_pcm_hw_param_t var, unsigned int val,
474 int dir)
475 {
476 int changed;
477 if (hw_is_mask(var)) {
478 struct snd_mask *m = hw_param_mask(params, var);
479 if (val == 0 && dir < 0) {
480 changed = -EINVAL;
481 snd_mask_none(m);
482 } else {
483 if (dir > 0)
484 val++;
485 else if (dir < 0)
486 val--;
487 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488 }
489 } else if (hw_is_interval(var)) {
490 struct snd_interval *i = hw_param_interval(params, var);
491 if (val == 0 && dir < 0) {
492 changed = -EINVAL;
493 snd_interval_none(i);
494 } else if (dir == 0)
495 changed = snd_interval_refine_set(i, val);
496 else {
497 struct snd_interval t;
498 t.openmin = 1;
499 t.openmax = 1;
500 t.empty = 0;
501 t.integer = 0;
502 if (dir < 0) {
503 t.min = val - 1;
504 t.max = val;
505 } else {
506 t.min = val;
507 t.max = val+1;
508 }
509 changed = snd_interval_refine(i, &t);
510 }
511 } else
512 return -EINVAL;
513 if (changed) {
514 params->cmask |= 1 << var;
515 params->rmask |= 1 << var;
516 }
517 return changed;
518 }
519
520 /**
521 * snd_pcm_hw_param_set
522 * @pcm: PCM instance
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
525 * @val: value to set
526 * @dir: pointer to the direction (-1,0,1) or NULL
527 *
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
531 */
snd_pcm_hw_param_set(struct snd_pcm_substream * pcm,struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var,unsigned int val,int dir)532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533 struct snd_pcm_hw_params *params,
534 snd_pcm_hw_param_t var, unsigned int val,
535 int dir)
536 {
537 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
538 if (changed < 0)
539 return changed;
540 if (params->rmask) {
541 int err = snd_pcm_hw_refine(pcm, params);
542 if (err < 0)
543 return err;
544 }
545 return snd_pcm_hw_param_value(params, var, NULL);
546 }
547
_snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params * params,snd_pcm_hw_param_t var)548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549 snd_pcm_hw_param_t var)
550 {
551 int changed;
552 changed = snd_interval_setinteger(hw_param_interval(params, var));
553 if (changed) {
554 params->cmask |= 1 << var;
555 params->rmask |= 1 << var;
556 }
557 return changed;
558 }
559
560 /*
561 * plugin
562 */
563
564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
snd_pcm_oss_plugin_clear(struct snd_pcm_substream * substream)565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
566 {
567 struct snd_pcm_runtime *runtime = substream->runtime;
568 struct snd_pcm_plugin *plugin, *next;
569
570 plugin = runtime->oss.plugin_first;
571 while (plugin) {
572 next = plugin->next;
573 snd_pcm_plugin_free(plugin);
574 plugin = next;
575 }
576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
577 return 0;
578 }
579
snd_pcm_plugin_insert(struct snd_pcm_plugin * plugin)580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
581 {
582 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
583 plugin->next = runtime->oss.plugin_first;
584 plugin->prev = NULL;
585 if (runtime->oss.plugin_first) {
586 runtime->oss.plugin_first->prev = plugin;
587 runtime->oss.plugin_first = plugin;
588 } else {
589 runtime->oss.plugin_last =
590 runtime->oss.plugin_first = plugin;
591 }
592 return 0;
593 }
594
snd_pcm_plugin_append(struct snd_pcm_plugin * plugin)595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
596 {
597 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
598 plugin->next = NULL;
599 plugin->prev = runtime->oss.plugin_last;
600 if (runtime->oss.plugin_last) {
601 runtime->oss.plugin_last->next = plugin;
602 runtime->oss.plugin_last = plugin;
603 } else {
604 runtime->oss.plugin_last =
605 runtime->oss.plugin_first = plugin;
606 }
607 return 0;
608 }
609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
610
snd_pcm_oss_bytes(struct snd_pcm_substream * substream,long frames)611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
612 {
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
615 long bytes = frames_to_bytes(runtime, frames);
616 if (buffer_size == runtime->oss.buffer_bytes)
617 return bytes;
618 #if BITS_PER_LONG >= 64
619 return runtime->oss.buffer_bytes * bytes / buffer_size;
620 #else
621 {
622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
623 return div_u64(bsize, buffer_size);
624 }
625 #endif
626 }
627
snd_pcm_alsa_frames(struct snd_pcm_substream * substream,long bytes)628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
629 {
630 struct snd_pcm_runtime *runtime = substream->runtime;
631 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
632 if (buffer_size == runtime->oss.buffer_bytes)
633 return bytes_to_frames(runtime, bytes);
634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
635 }
636
637 static inline
get_hw_ptr_period(struct snd_pcm_runtime * runtime)638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
639 {
640 return runtime->hw_ptr_interrupt;
641 }
642
643 /* define extended formats in the recent OSS versions (if any) */
644 /* linear formats */
645 #define AFMT_S32_LE 0x00001000
646 #define AFMT_S32_BE 0x00002000
647 #define AFMT_S24_LE 0x00008000
648 #define AFMT_S24_BE 0x00010000
649 #define AFMT_S24_PACKED 0x00040000
650
651 /* other supported formats */
652 #define AFMT_FLOAT 0x00004000
653 #define AFMT_SPDIF_RAW 0x00020000
654
655 /* unsupported formats */
656 #define AFMT_AC3 0x00000400
657 #define AFMT_VORBIS 0x00000800
658
snd_pcm_oss_format_from(int format)659 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
660 {
661 switch (format) {
662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
679 default: return SNDRV_PCM_FORMAT_U8;
680 }
681 }
682
snd_pcm_oss_format_to(snd_pcm_format_t format)683 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
684 {
685 switch (format) {
686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
703 default: return -EINVAL;
704 }
705 }
706
snd_pcm_oss_period_size(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * oss_params,struct snd_pcm_hw_params * slave_params)707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
708 struct snd_pcm_hw_params *oss_params,
709 struct snd_pcm_hw_params *slave_params)
710 {
711 size_t s;
712 size_t oss_buffer_size, oss_period_size, oss_periods;
713 size_t min_period_size, max_period_size;
714 struct snd_pcm_runtime *runtime = substream->runtime;
715 size_t oss_frame_size;
716
717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718 params_channels(oss_params) / 8;
719
720 oss_buffer_size = snd_pcm_plug_client_size(substream,
721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722 oss_buffer_size = 1 << ld2(oss_buffer_size);
723 if (atomic_read(&substream->mmap_count)) {
724 if (oss_buffer_size > runtime->oss.mmap_bytes)
725 oss_buffer_size = runtime->oss.mmap_bytes;
726 }
727
728 if (substream->oss.setup.period_size > 16)
729 oss_period_size = substream->oss.setup.period_size;
730 else if (runtime->oss.fragshift) {
731 oss_period_size = 1 << runtime->oss.fragshift;
732 if (oss_period_size > oss_buffer_size / 2)
733 oss_period_size = oss_buffer_size / 2;
734 } else {
735 int sd;
736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
737
738 oss_period_size = oss_buffer_size;
739 do {
740 oss_period_size /= 2;
741 } while (oss_period_size > bytes_per_sec);
742 if (runtime->oss.subdivision == 0) {
743 sd = 4;
744 if (oss_period_size / sd > 4096)
745 sd *= 2;
746 if (oss_period_size / sd < 4096)
747 sd = 1;
748 } else
749 sd = runtime->oss.subdivision;
750 oss_period_size /= sd;
751 if (oss_period_size < 16)
752 oss_period_size = 16;
753 }
754
755 min_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 min_period_size *= oss_frame_size;
758 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
759 if (oss_period_size < min_period_size)
760 oss_period_size = min_period_size;
761
762 max_period_size = snd_pcm_plug_client_size(substream,
763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764 max_period_size *= oss_frame_size;
765 max_period_size = 1 << ld2(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
768
769 oss_periods = oss_buffer_size / oss_period_size;
770
771 if (substream->oss.setup.periods > 1)
772 oss_periods = substream->oss.setup.periods;
773
774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776 s = runtime->oss.maxfrags;
777 if (oss_periods > s)
778 oss_periods = s;
779
780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
781 if (s < 2)
782 s = 2;
783 if (oss_periods < s)
784 oss_periods = s;
785
786 while (oss_period_size * oss_periods > oss_buffer_size)
787 oss_period_size /= 2;
788
789 if (oss_period_size < 16)
790 return -EINVAL;
791 runtime->oss.period_bytes = oss_period_size;
792 runtime->oss.period_frames = 1;
793 runtime->oss.periods = oss_periods;
794 return 0;
795 }
796
choose_rate(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,unsigned int best_rate)797 static int choose_rate(struct snd_pcm_substream *substream,
798 struct snd_pcm_hw_params *params, unsigned int best_rate)
799 {
800 struct snd_interval *it;
801 struct snd_pcm_hw_params *save;
802 unsigned int rate, prev;
803
804 save = kmalloc(sizeof(*save), GFP_KERNEL);
805 if (save == NULL)
806 return -ENOMEM;
807 *save = *params;
808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
809
810 /* try multiples of the best rate */
811 rate = best_rate;
812 for (;;) {
813 if (it->max < rate || (it->max == rate && it->openmax))
814 break;
815 if (it->min < rate || (it->min == rate && !it->openmin)) {
816 int ret;
817 ret = snd_pcm_hw_param_set(substream, params,
818 SNDRV_PCM_HW_PARAM_RATE,
819 rate, 0);
820 if (ret == (int)rate) {
821 kfree(save);
822 return rate;
823 }
824 *params = *save;
825 }
826 prev = rate;
827 rate += best_rate;
828 if (rate <= prev)
829 break;
830 }
831
832 /* not found, use the nearest rate */
833 kfree(save);
834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
835 }
836
snd_pcm_oss_change_params(struct snd_pcm_substream * substream)837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
838 {
839 struct snd_pcm_runtime *runtime = substream->runtime;
840 struct snd_pcm_hw_params *params, *sparams;
841 struct snd_pcm_sw_params *sw_params;
842 ssize_t oss_buffer_size, oss_period_size;
843 size_t oss_frame_size;
844 int err;
845 int direct;
846 snd_pcm_format_t format, sformat;
847 int n;
848 struct snd_mask sformat_mask;
849 struct snd_mask mask;
850
851 if (mutex_lock_interruptible(&runtime->oss.params_lock))
852 return -EINTR;
853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854 params = kmalloc(sizeof(*params), GFP_KERNEL);
855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856 if (!sw_params || !params || !sparams) {
857 snd_printd("No memory\n");
858 err = -ENOMEM;
859 goto failure;
860 }
861
862 if (atomic_read(&substream->mmap_count))
863 direct = 1;
864 else
865 direct = substream->oss.setup.direct;
866
867 _snd_pcm_hw_params_any(sparams);
868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
870 snd_mask_none(&mask);
871 if (atomic_read(&substream->mmap_count))
872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
873 else {
874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
875 if (!direct)
876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
877 }
878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879 if (err < 0) {
880 snd_printd("No usable accesses\n");
881 err = -EINVAL;
882 goto failure;
883 }
884 choose_rate(substream, sparams, runtime->oss.rate);
885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886
887 format = snd_pcm_oss_format_from(runtime->oss.format);
888
889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
890 if (direct)
891 sformat = format;
892 else
893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894
895 if ((__force int)sformat < 0 ||
896 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
897 for (sformat = (__force snd_pcm_format_t)0;
898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
900 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
901 snd_pcm_oss_format_to(sformat) >= 0)
902 break;
903 }
904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
905 snd_printd("Cannot find a format!!!\n");
906 err = -EINVAL;
907 goto failure;
908 }
909 }
910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
911 if (err < 0)
912 goto failure;
913
914 if (direct) {
915 memcpy(params, sparams, sizeof(*params));
916 } else {
917 _snd_pcm_hw_params_any(params);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
923 runtime->oss.channels, 0);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
925 runtime->oss.rate, 0);
926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
927 params_access(params), params_format(params),
928 params_channels(params), params_rate(params));
929 }
930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
931 params_access(sparams), params_format(sparams),
932 params_channels(sparams), params_rate(sparams));
933
934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
935 params_channels(params) / 8;
936
937 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
938 snd_pcm_oss_plugin_clear(substream);
939 if (!direct) {
940 /* add necessary plugins */
941 snd_pcm_oss_plugin_clear(substream);
942 if ((err = snd_pcm_plug_format_plugins(substream,
943 params,
944 sparams)) < 0) {
945 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
946 snd_pcm_oss_plugin_clear(substream);
947 goto failure;
948 }
949 if (runtime->oss.plugin_first) {
950 struct snd_pcm_plugin *plugin;
951 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
952 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
953 snd_pcm_oss_plugin_clear(substream);
954 goto failure;
955 }
956 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
957 err = snd_pcm_plugin_append(plugin);
958 } else {
959 err = snd_pcm_plugin_insert(plugin);
960 }
961 if (err < 0) {
962 snd_pcm_oss_plugin_clear(substream);
963 goto failure;
964 }
965 }
966 }
967 #endif
968
969 err = snd_pcm_oss_period_size(substream, params, sparams);
970 if (err < 0)
971 goto failure;
972
973 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
974 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
975 if (err < 0)
976 goto failure;
977
978 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
979 runtime->oss.periods, NULL);
980 if (err < 0)
981 goto failure;
982
983 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
984
985 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
986 snd_printd("HW_PARAMS failed: %i\n", err);
987 goto failure;
988 }
989
990 memset(sw_params, 0, sizeof(*sw_params));
991 if (runtime->oss.trigger) {
992 sw_params->start_threshold = 1;
993 } else {
994 sw_params->start_threshold = runtime->boundary;
995 }
996 if (atomic_read(&substream->mmap_count) ||
997 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
998 sw_params->stop_threshold = runtime->boundary;
999 else
1000 sw_params->stop_threshold = runtime->buffer_size;
1001 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1002 sw_params->period_step = 1;
1003 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1004 1 : runtime->period_size;
1005 if (atomic_read(&substream->mmap_count) ||
1006 substream->oss.setup.nosilence) {
1007 sw_params->silence_threshold = 0;
1008 sw_params->silence_size = 0;
1009 } else {
1010 snd_pcm_uframes_t frames;
1011 frames = runtime->period_size + 16;
1012 if (frames > runtime->buffer_size)
1013 frames = runtime->buffer_size;
1014 sw_params->silence_threshold = frames;
1015 sw_params->silence_size = frames;
1016 }
1017
1018 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1019 snd_printd("SW_PARAMS failed: %i\n", err);
1020 goto failure;
1021 }
1022
1023 runtime->oss.periods = params_periods(sparams);
1024 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1025 if (oss_period_size < 0) {
1026 err = -EINVAL;
1027 goto failure;
1028 }
1029 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1030 if (runtime->oss.plugin_first) {
1031 err = snd_pcm_plug_alloc(substream, oss_period_size);
1032 if (err < 0)
1033 goto failure;
1034 }
1035 #endif
1036 oss_period_size *= oss_frame_size;
1037
1038 oss_buffer_size = oss_period_size * runtime->oss.periods;
1039 if (oss_buffer_size < 0) {
1040 err = -EINVAL;
1041 goto failure;
1042 }
1043
1044 runtime->oss.period_bytes = oss_period_size;
1045 runtime->oss.buffer_bytes = oss_buffer_size;
1046
1047 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1048 runtime->oss.period_bytes,
1049 runtime->oss.buffer_bytes);
1050 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1051 params_period_size(sparams),
1052 params_buffer_size(sparams));
1053
1054 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1055 runtime->oss.channels = params_channels(params);
1056 runtime->oss.rate = params_rate(params);
1057
1058 vfree(runtime->oss.buffer);
1059 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1060 if (!runtime->oss.buffer) {
1061 err = -ENOMEM;
1062 goto failure;
1063 }
1064
1065 runtime->oss.params = 0;
1066 runtime->oss.prepare = 1;
1067 runtime->oss.buffer_used = 0;
1068 if (runtime->dma_area)
1069 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1070
1071 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1072
1073 err = 0;
1074 failure:
1075 kfree(sw_params);
1076 kfree(params);
1077 kfree(sparams);
1078 mutex_unlock(&runtime->oss.params_lock);
1079 return err;
1080 }
1081
snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file * pcm_oss_file,struct snd_pcm_substream ** r_substream)1082 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1083 {
1084 int idx, err;
1085 struct snd_pcm_substream *asubstream = NULL, *substream;
1086
1087 for (idx = 0; idx < 2; idx++) {
1088 substream = pcm_oss_file->streams[idx];
1089 if (substream == NULL)
1090 continue;
1091 if (asubstream == NULL)
1092 asubstream = substream;
1093 if (substream->runtime->oss.params) {
1094 err = snd_pcm_oss_change_params(substream);
1095 if (err < 0)
1096 return err;
1097 }
1098 }
1099 if (!asubstream)
1100 return -EIO;
1101 if (r_substream)
1102 *r_substream = asubstream;
1103 return 0;
1104 }
1105
snd_pcm_oss_prepare(struct snd_pcm_substream * substream)1106 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1107 {
1108 int err;
1109 struct snd_pcm_runtime *runtime = substream->runtime;
1110
1111 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1112 if (err < 0) {
1113 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1114 return err;
1115 }
1116 runtime->oss.prepare = 0;
1117 runtime->oss.prev_hw_ptr_period = 0;
1118 runtime->oss.period_ptr = 0;
1119 runtime->oss.buffer_used = 0;
1120
1121 return 0;
1122 }
1123
snd_pcm_oss_make_ready(struct snd_pcm_substream * substream)1124 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1125 {
1126 struct snd_pcm_runtime *runtime;
1127 int err;
1128
1129 if (substream == NULL)
1130 return 0;
1131 runtime = substream->runtime;
1132 if (runtime->oss.params) {
1133 err = snd_pcm_oss_change_params(substream);
1134 if (err < 0)
1135 return err;
1136 }
1137 if (runtime->oss.prepare) {
1138 err = snd_pcm_oss_prepare(substream);
1139 if (err < 0)
1140 return err;
1141 }
1142 return 0;
1143 }
1144
snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream * substream,snd_pcm_sframes_t * delay)1145 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1146 {
1147 struct snd_pcm_runtime *runtime;
1148 snd_pcm_uframes_t frames;
1149 int err = 0;
1150
1151 while (1) {
1152 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1153 if (err < 0)
1154 break;
1155 runtime = substream->runtime;
1156 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1157 break;
1158 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1159 /* until avail(delay) <= buffer_size */
1160 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1161 frames /= runtime->period_size;
1162 frames *= runtime->period_size;
1163 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1164 if (err < 0)
1165 break;
1166 }
1167 return err;
1168 }
1169
snd_pcm_oss_write3(struct snd_pcm_substream * substream,const char * ptr,snd_pcm_uframes_t frames,int in_kernel)1170 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1171 {
1172 struct snd_pcm_runtime *runtime = substream->runtime;
1173 int ret;
1174 while (1) {
1175 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1176 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1177 #ifdef OSS_DEBUG
1178 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1179 printk(KERN_DEBUG "pcm_oss: write: "
1180 "recovering from XRUN\n");
1181 else
1182 printk(KERN_DEBUG "pcm_oss: write: "
1183 "recovering from SUSPEND\n");
1184 #endif
1185 ret = snd_pcm_oss_prepare(substream);
1186 if (ret < 0)
1187 break;
1188 }
1189 if (in_kernel) {
1190 mm_segment_t fs;
1191 fs = snd_enter_user();
1192 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1193 snd_leave_user(fs);
1194 } else {
1195 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1196 }
1197 if (ret != -EPIPE && ret != -ESTRPIPE)
1198 break;
1199 /* test, if we can't store new data, because the stream */
1200 /* has not been started */
1201 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202 return -EAGAIN;
1203 }
1204 return ret;
1205 }
1206
snd_pcm_oss_read3(struct snd_pcm_substream * substream,char * ptr,snd_pcm_uframes_t frames,int in_kernel)1207 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208 {
1209 struct snd_pcm_runtime *runtime = substream->runtime;
1210 snd_pcm_sframes_t delay;
1211 int ret;
1212 while (1) {
1213 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215 #ifdef OSS_DEBUG
1216 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1217 printk(KERN_DEBUG "pcm_oss: read: "
1218 "recovering from XRUN\n");
1219 else
1220 printk(KERN_DEBUG "pcm_oss: read: "
1221 "recovering from SUSPEND\n");
1222 #endif
1223 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1224 if (ret < 0)
1225 break;
1226 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1227 ret = snd_pcm_oss_prepare(substream);
1228 if (ret < 0)
1229 break;
1230 }
1231 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1232 if (ret < 0)
1233 break;
1234 if (in_kernel) {
1235 mm_segment_t fs;
1236 fs = snd_enter_user();
1237 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1238 snd_leave_user(fs);
1239 } else {
1240 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1241 }
1242 if (ret == -EPIPE) {
1243 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1244 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1245 if (ret < 0)
1246 break;
1247 }
1248 continue;
1249 }
1250 if (ret != -ESTRPIPE)
1251 break;
1252 }
1253 return ret;
1254 }
1255
snd_pcm_oss_writev3(struct snd_pcm_substream * substream,void ** bufs,snd_pcm_uframes_t frames,int in_kernel)1256 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1257 {
1258 struct snd_pcm_runtime *runtime = substream->runtime;
1259 int ret;
1260 while (1) {
1261 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1262 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1263 #ifdef OSS_DEBUG
1264 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1265 printk(KERN_DEBUG "pcm_oss: writev: "
1266 "recovering from XRUN\n");
1267 else
1268 printk(KERN_DEBUG "pcm_oss: writev: "
1269 "recovering from SUSPEND\n");
1270 #endif
1271 ret = snd_pcm_oss_prepare(substream);
1272 if (ret < 0)
1273 break;
1274 }
1275 if (in_kernel) {
1276 mm_segment_t fs;
1277 fs = snd_enter_user();
1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279 snd_leave_user(fs);
1280 } else {
1281 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1282 }
1283 if (ret != -EPIPE && ret != -ESTRPIPE)
1284 break;
1285
1286 /* test, if we can't store new data, because the stream */
1287 /* has not been started */
1288 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1289 return -EAGAIN;
1290 }
1291 return ret;
1292 }
1293
snd_pcm_oss_readv3(struct snd_pcm_substream * substream,void ** bufs,snd_pcm_uframes_t frames,int in_kernel)1294 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1295 {
1296 struct snd_pcm_runtime *runtime = substream->runtime;
1297 int ret;
1298 while (1) {
1299 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1300 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1301 #ifdef OSS_DEBUG
1302 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
1303 printk(KERN_DEBUG "pcm_oss: readv: "
1304 "recovering from XRUN\n");
1305 else
1306 printk(KERN_DEBUG "pcm_oss: readv: "
1307 "recovering from SUSPEND\n");
1308 #endif
1309 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1310 if (ret < 0)
1311 break;
1312 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1313 ret = snd_pcm_oss_prepare(substream);
1314 if (ret < 0)
1315 break;
1316 }
1317 if (in_kernel) {
1318 mm_segment_t fs;
1319 fs = snd_enter_user();
1320 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1321 snd_leave_user(fs);
1322 } else {
1323 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1324 }
1325 if (ret != -EPIPE && ret != -ESTRPIPE)
1326 break;
1327 }
1328 return ret;
1329 }
1330
snd_pcm_oss_write2(struct snd_pcm_substream * substream,const char * buf,size_t bytes,int in_kernel)1331 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1332 {
1333 struct snd_pcm_runtime *runtime = substream->runtime;
1334 snd_pcm_sframes_t frames, frames1;
1335 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1336 if (runtime->oss.plugin_first) {
1337 struct snd_pcm_plugin_channel *channels;
1338 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1339 if (!in_kernel) {
1340 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1341 return -EFAULT;
1342 buf = runtime->oss.buffer;
1343 }
1344 frames = bytes / oss_frame_bytes;
1345 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1346 if (frames1 < 0)
1347 return frames1;
1348 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1349 if (frames1 <= 0)
1350 return frames1;
1351 bytes = frames1 * oss_frame_bytes;
1352 } else
1353 #endif
1354 {
1355 frames = bytes_to_frames(runtime, bytes);
1356 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1357 if (frames1 <= 0)
1358 return frames1;
1359 bytes = frames_to_bytes(runtime, frames1);
1360 }
1361 return bytes;
1362 }
1363
snd_pcm_oss_write1(struct snd_pcm_substream * substream,const char __user * buf,size_t bytes)1364 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1365 {
1366 size_t xfer = 0;
1367 ssize_t tmp;
1368 struct snd_pcm_runtime *runtime = substream->runtime;
1369
1370 if (atomic_read(&substream->mmap_count))
1371 return -ENXIO;
1372
1373 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1374 return tmp;
1375 mutex_lock(&runtime->oss.params_lock);
1376 while (bytes > 0) {
1377 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1378 tmp = bytes;
1379 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1380 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1381 if (tmp > 0) {
1382 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1383 tmp = -EFAULT;
1384 goto err;
1385 }
1386 }
1387 runtime->oss.buffer_used += tmp;
1388 buf += tmp;
1389 bytes -= tmp;
1390 xfer += tmp;
1391 if (substream->oss.setup.partialfrag ||
1392 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1393 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1394 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1395 if (tmp <= 0)
1396 goto err;
1397 runtime->oss.bytes += tmp;
1398 runtime->oss.period_ptr += tmp;
1399 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1400 if (runtime->oss.period_ptr == 0 ||
1401 runtime->oss.period_ptr == runtime->oss.buffer_used)
1402 runtime->oss.buffer_used = 0;
1403 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1404 tmp = -EAGAIN;
1405 goto err;
1406 }
1407 }
1408 } else {
1409 tmp = snd_pcm_oss_write2(substream,
1410 (const char __force *)buf,
1411 runtime->oss.period_bytes, 0);
1412 if (tmp <= 0)
1413 goto err;
1414 runtime->oss.bytes += tmp;
1415 buf += tmp;
1416 bytes -= tmp;
1417 xfer += tmp;
1418 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1419 tmp != runtime->oss.period_bytes)
1420 break;
1421 }
1422 }
1423 mutex_unlock(&runtime->oss.params_lock);
1424 return xfer;
1425
1426 err:
1427 mutex_unlock(&runtime->oss.params_lock);
1428 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1429 }
1430
snd_pcm_oss_read2(struct snd_pcm_substream * substream,char * buf,size_t bytes,int in_kernel)1431 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1432 {
1433 struct snd_pcm_runtime *runtime = substream->runtime;
1434 snd_pcm_sframes_t frames, frames1;
1435 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1436 char __user *final_dst = (char __force __user *)buf;
1437 if (runtime->oss.plugin_first) {
1438 struct snd_pcm_plugin_channel *channels;
1439 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1440 if (!in_kernel)
1441 buf = runtime->oss.buffer;
1442 frames = bytes / oss_frame_bytes;
1443 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1444 if (frames1 < 0)
1445 return frames1;
1446 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1447 if (frames1 <= 0)
1448 return frames1;
1449 bytes = frames1 * oss_frame_bytes;
1450 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1451 return -EFAULT;
1452 } else
1453 #endif
1454 {
1455 frames = bytes_to_frames(runtime, bytes);
1456 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1457 if (frames1 <= 0)
1458 return frames1;
1459 bytes = frames_to_bytes(runtime, frames1);
1460 }
1461 return bytes;
1462 }
1463
snd_pcm_oss_read1(struct snd_pcm_substream * substream,char __user * buf,size_t bytes)1464 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1465 {
1466 size_t xfer = 0;
1467 ssize_t tmp;
1468 struct snd_pcm_runtime *runtime = substream->runtime;
1469
1470 if (atomic_read(&substream->mmap_count))
1471 return -ENXIO;
1472
1473 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1474 return tmp;
1475 mutex_lock(&runtime->oss.params_lock);
1476 while (bytes > 0) {
1477 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1478 if (runtime->oss.buffer_used == 0) {
1479 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1480 if (tmp <= 0)
1481 goto err;
1482 runtime->oss.bytes += tmp;
1483 runtime->oss.period_ptr = tmp;
1484 runtime->oss.buffer_used = tmp;
1485 }
1486 tmp = bytes;
1487 if ((size_t) tmp > runtime->oss.buffer_used)
1488 tmp = runtime->oss.buffer_used;
1489 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1490 tmp = -EFAULT;
1491 goto err;
1492 }
1493 buf += tmp;
1494 bytes -= tmp;
1495 xfer += tmp;
1496 runtime->oss.buffer_used -= tmp;
1497 } else {
1498 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1499 runtime->oss.period_bytes, 0);
1500 if (tmp <= 0)
1501 goto err;
1502 runtime->oss.bytes += tmp;
1503 buf += tmp;
1504 bytes -= tmp;
1505 xfer += tmp;
1506 }
1507 }
1508 mutex_unlock(&runtime->oss.params_lock);
1509 return xfer;
1510
1511 err:
1512 mutex_unlock(&runtime->oss.params_lock);
1513 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1514 }
1515
snd_pcm_oss_reset(struct snd_pcm_oss_file * pcm_oss_file)1516 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1517 {
1518 struct snd_pcm_substream *substream;
1519 struct snd_pcm_runtime *runtime;
1520 int i;
1521
1522 for (i = 0; i < 2; i++) {
1523 substream = pcm_oss_file->streams[i];
1524 if (!substream)
1525 continue;
1526 runtime = substream->runtime;
1527 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1528 runtime->oss.prepare = 1;
1529 runtime->oss.buffer_used = 0;
1530 runtime->oss.prev_hw_ptr_period = 0;
1531 runtime->oss.period_ptr = 0;
1532 }
1533 return 0;
1534 }
1535
snd_pcm_oss_post(struct snd_pcm_oss_file * pcm_oss_file)1536 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1537 {
1538 struct snd_pcm_substream *substream;
1539 int err;
1540
1541 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1542 if (substream != NULL) {
1543 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1544 return err;
1545 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1546 }
1547 /* note: all errors from the start action are ignored */
1548 /* OSS apps do not know, how to handle them */
1549 return 0;
1550 }
1551
snd_pcm_oss_sync1(struct snd_pcm_substream * substream,size_t size)1552 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1553 {
1554 struct snd_pcm_runtime *runtime;
1555 ssize_t result = 0;
1556 snd_pcm_state_t state;
1557 long res;
1558 wait_queue_t wait;
1559
1560 runtime = substream->runtime;
1561 init_waitqueue_entry(&wait, current);
1562 add_wait_queue(&runtime->sleep, &wait);
1563 #ifdef OSS_DEBUG
1564 printk(KERN_DEBUG "sync1: size = %li\n", size);
1565 #endif
1566 while (1) {
1567 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1568 if (result > 0) {
1569 runtime->oss.buffer_used = 0;
1570 result = 0;
1571 break;
1572 }
1573 if (result != 0 && result != -EAGAIN)
1574 break;
1575 result = 0;
1576 set_current_state(TASK_INTERRUPTIBLE);
1577 snd_pcm_stream_lock_irq(substream);
1578 state = runtime->status->state;
1579 snd_pcm_stream_unlock_irq(substream);
1580 if (state != SNDRV_PCM_STATE_RUNNING) {
1581 set_current_state(TASK_RUNNING);
1582 break;
1583 }
1584 res = schedule_timeout(10 * HZ);
1585 if (signal_pending(current)) {
1586 result = -ERESTARTSYS;
1587 break;
1588 }
1589 if (res == 0) {
1590 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1591 result = -EIO;
1592 break;
1593 }
1594 }
1595 remove_wait_queue(&runtime->sleep, &wait);
1596 return result;
1597 }
1598
snd_pcm_oss_sync(struct snd_pcm_oss_file * pcm_oss_file)1599 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1600 {
1601 int err = 0;
1602 unsigned int saved_f_flags;
1603 struct snd_pcm_substream *substream;
1604 struct snd_pcm_runtime *runtime;
1605 snd_pcm_format_t format;
1606 unsigned long width;
1607 size_t size;
1608
1609 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1610 if (substream != NULL) {
1611 runtime = substream->runtime;
1612 if (atomic_read(&substream->mmap_count))
1613 goto __direct;
1614 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1615 return err;
1616 format = snd_pcm_oss_format_from(runtime->oss.format);
1617 width = snd_pcm_format_physical_width(format);
1618 mutex_lock(&runtime->oss.params_lock);
1619 if (runtime->oss.buffer_used > 0) {
1620 #ifdef OSS_DEBUG
1621 printk(KERN_DEBUG "sync: buffer_used\n");
1622 #endif
1623 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1624 snd_pcm_format_set_silence(format,
1625 runtime->oss.buffer + runtime->oss.buffer_used,
1626 size);
1627 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1628 if (err < 0) {
1629 mutex_unlock(&runtime->oss.params_lock);
1630 return err;
1631 }
1632 } else if (runtime->oss.period_ptr > 0) {
1633 #ifdef OSS_DEBUG
1634 printk(KERN_DEBUG "sync: period_ptr\n");
1635 #endif
1636 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1637 snd_pcm_format_set_silence(format,
1638 runtime->oss.buffer,
1639 size * 8 / width);
1640 err = snd_pcm_oss_sync1(substream, size);
1641 if (err < 0) {
1642 mutex_unlock(&runtime->oss.params_lock);
1643 return err;
1644 }
1645 }
1646 /*
1647 * The ALSA's period might be a bit large than OSS one.
1648 * Fill the remain portion of ALSA period with zeros.
1649 */
1650 size = runtime->control->appl_ptr % runtime->period_size;
1651 if (size > 0) {
1652 size = runtime->period_size - size;
1653 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1654 size = (runtime->frame_bits * size) / 8;
1655 while (size > 0) {
1656 mm_segment_t fs;
1657 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1658 size -= size1;
1659 size1 *= 8;
1660 size1 /= runtime->sample_bits;
1661 snd_pcm_format_set_silence(runtime->format,
1662 runtime->oss.buffer,
1663 size1);
1664 size1 /= runtime->channels; /* frames */
1665 fs = snd_enter_user();
1666 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1667 snd_leave_user(fs);
1668 }
1669 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1670 void __user *buffers[runtime->channels];
1671 memset(buffers, 0, runtime->channels * sizeof(void *));
1672 snd_pcm_lib_writev(substream, buffers, size);
1673 }
1674 }
1675 mutex_unlock(&runtime->oss.params_lock);
1676 /*
1677 * finish sync: drain the buffer
1678 */
1679 __direct:
1680 saved_f_flags = substream->f_flags;
1681 substream->f_flags &= ~O_NONBLOCK;
1682 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1683 substream->f_flags = saved_f_flags;
1684 if (err < 0)
1685 return err;
1686 runtime->oss.prepare = 1;
1687 }
1688
1689 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1690 if (substream != NULL) {
1691 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1692 return err;
1693 runtime = substream->runtime;
1694 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1695 if (err < 0)
1696 return err;
1697 runtime->oss.buffer_used = 0;
1698 runtime->oss.prepare = 1;
1699 }
1700 return 0;
1701 }
1702
snd_pcm_oss_set_rate(struct snd_pcm_oss_file * pcm_oss_file,int rate)1703 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1704 {
1705 int idx;
1706
1707 for (idx = 1; idx >= 0; --idx) {
1708 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1709 struct snd_pcm_runtime *runtime;
1710 if (substream == NULL)
1711 continue;
1712 runtime = substream->runtime;
1713 if (rate < 1000)
1714 rate = 1000;
1715 else if (rate > 192000)
1716 rate = 192000;
1717 if (runtime->oss.rate != rate) {
1718 runtime->oss.params = 1;
1719 runtime->oss.rate = rate;
1720 }
1721 }
1722 return snd_pcm_oss_get_rate(pcm_oss_file);
1723 }
1724
snd_pcm_oss_get_rate(struct snd_pcm_oss_file * pcm_oss_file)1725 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1726 {
1727 struct snd_pcm_substream *substream;
1728 int err;
1729
1730 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1731 return err;
1732 return substream->runtime->oss.rate;
1733 }
1734
snd_pcm_oss_set_channels(struct snd_pcm_oss_file * pcm_oss_file,unsigned int channels)1735 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1736 {
1737 int idx;
1738 if (channels < 1)
1739 channels = 1;
1740 if (channels > 128)
1741 return -EINVAL;
1742 for (idx = 1; idx >= 0; --idx) {
1743 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1744 struct snd_pcm_runtime *runtime;
1745 if (substream == NULL)
1746 continue;
1747 runtime = substream->runtime;
1748 if (runtime->oss.channels != channels) {
1749 runtime->oss.params = 1;
1750 runtime->oss.channels = channels;
1751 }
1752 }
1753 return snd_pcm_oss_get_channels(pcm_oss_file);
1754 }
1755
snd_pcm_oss_get_channels(struct snd_pcm_oss_file * pcm_oss_file)1756 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1757 {
1758 struct snd_pcm_substream *substream;
1759 int err;
1760
1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762 return err;
1763 return substream->runtime->oss.channels;
1764 }
1765
snd_pcm_oss_get_block_size(struct snd_pcm_oss_file * pcm_oss_file)1766 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1767 {
1768 struct snd_pcm_substream *substream;
1769 int err;
1770
1771 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1772 return err;
1773 return substream->runtime->oss.period_bytes;
1774 }
1775
snd_pcm_oss_get_formats(struct snd_pcm_oss_file * pcm_oss_file)1776 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1777 {
1778 struct snd_pcm_substream *substream;
1779 int err;
1780 int direct;
1781 struct snd_pcm_hw_params *params;
1782 unsigned int formats = 0;
1783 struct snd_mask format_mask;
1784 int fmt;
1785
1786 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1787 return err;
1788 if (atomic_read(&substream->mmap_count))
1789 direct = 1;
1790 else
1791 direct = substream->oss.setup.direct;
1792 if (!direct)
1793 return AFMT_MU_LAW | AFMT_U8 |
1794 AFMT_S16_LE | AFMT_S16_BE |
1795 AFMT_S8 | AFMT_U16_LE |
1796 AFMT_U16_BE |
1797 AFMT_S32_LE | AFMT_S32_BE |
1798 AFMT_S24_LE | AFMT_S24_BE |
1799 AFMT_S24_PACKED;
1800 params = kmalloc(sizeof(*params), GFP_KERNEL);
1801 if (!params)
1802 return -ENOMEM;
1803 _snd_pcm_hw_params_any(params);
1804 err = snd_pcm_hw_refine(substream, params);
1805 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1806 kfree(params);
1807 if (err < 0)
1808 return err;
1809 for (fmt = 0; fmt < 32; ++fmt) {
1810 if (snd_mask_test(&format_mask, fmt)) {
1811 int f = snd_pcm_oss_format_to(fmt);
1812 if (f >= 0)
1813 formats |= f;
1814 }
1815 }
1816 return formats;
1817 }
1818
snd_pcm_oss_set_format(struct snd_pcm_oss_file * pcm_oss_file,int format)1819 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1820 {
1821 int formats, idx;
1822
1823 if (format != AFMT_QUERY) {
1824 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1825 if (formats < 0)
1826 return formats;
1827 if (!(formats & format))
1828 format = AFMT_U8;
1829 for (idx = 1; idx >= 0; --idx) {
1830 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1831 struct snd_pcm_runtime *runtime;
1832 if (substream == NULL)
1833 continue;
1834 runtime = substream->runtime;
1835 if (runtime->oss.format != format) {
1836 runtime->oss.params = 1;
1837 runtime->oss.format = format;
1838 }
1839 }
1840 }
1841 return snd_pcm_oss_get_format(pcm_oss_file);
1842 }
1843
snd_pcm_oss_get_format(struct snd_pcm_oss_file * pcm_oss_file)1844 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1845 {
1846 struct snd_pcm_substream *substream;
1847 int err;
1848
1849 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1850 return err;
1851 return substream->runtime->oss.format;
1852 }
1853
snd_pcm_oss_set_subdivide1(struct snd_pcm_substream * substream,int subdivide)1854 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1855 {
1856 struct snd_pcm_runtime *runtime;
1857
1858 if (substream == NULL)
1859 return 0;
1860 runtime = substream->runtime;
1861 if (subdivide == 0) {
1862 subdivide = runtime->oss.subdivision;
1863 if (subdivide == 0)
1864 subdivide = 1;
1865 return subdivide;
1866 }
1867 if (runtime->oss.subdivision || runtime->oss.fragshift)
1868 return -EINVAL;
1869 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1870 subdivide != 8 && subdivide != 16)
1871 return -EINVAL;
1872 runtime->oss.subdivision = subdivide;
1873 runtime->oss.params = 1;
1874 return subdivide;
1875 }
1876
snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file * pcm_oss_file,int subdivide)1877 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1878 {
1879 int err = -EINVAL, idx;
1880
1881 for (idx = 1; idx >= 0; --idx) {
1882 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1883 if (substream == NULL)
1884 continue;
1885 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1886 return err;
1887 }
1888 return err;
1889 }
1890
snd_pcm_oss_set_fragment1(struct snd_pcm_substream * substream,unsigned int val)1891 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1892 {
1893 struct snd_pcm_runtime *runtime;
1894
1895 if (substream == NULL)
1896 return 0;
1897 runtime = substream->runtime;
1898 if (runtime->oss.subdivision || runtime->oss.fragshift)
1899 return -EINVAL;
1900 runtime->oss.fragshift = val & 0xffff;
1901 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1902 if (runtime->oss.fragshift < 4) /* < 16 */
1903 runtime->oss.fragshift = 4;
1904 if (runtime->oss.maxfrags < 2)
1905 runtime->oss.maxfrags = 2;
1906 runtime->oss.params = 1;
1907 return 0;
1908 }
1909
snd_pcm_oss_set_fragment(struct snd_pcm_oss_file * pcm_oss_file,unsigned int val)1910 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1911 {
1912 int err = -EINVAL, idx;
1913
1914 for (idx = 1; idx >= 0; --idx) {
1915 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1916 if (substream == NULL)
1917 continue;
1918 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1919 return err;
1920 }
1921 return err;
1922 }
1923
snd_pcm_oss_nonblock(struct file * file)1924 static int snd_pcm_oss_nonblock(struct file * file)
1925 {
1926 spin_lock(&file->f_lock);
1927 file->f_flags |= O_NONBLOCK;
1928 spin_unlock(&file->f_lock);
1929 return 0;
1930 }
1931
snd_pcm_oss_get_caps1(struct snd_pcm_substream * substream,int res)1932 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1933 {
1934
1935 if (substream == NULL) {
1936 res &= ~DSP_CAP_DUPLEX;
1937 return res;
1938 }
1939 #ifdef DSP_CAP_MULTI
1940 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1941 if (substream->pstr->substream_count > 1)
1942 res |= DSP_CAP_MULTI;
1943 #endif
1944 /* DSP_CAP_REALTIME is set all times: */
1945 /* all ALSA drivers can return actual pointer in ring buffer */
1946 #if defined(DSP_CAP_REALTIME) && 0
1947 {
1948 struct snd_pcm_runtime *runtime = substream->runtime;
1949 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1950 res &= ~DSP_CAP_REALTIME;
1951 }
1952 #endif
1953 return res;
1954 }
1955
snd_pcm_oss_get_caps(struct snd_pcm_oss_file * pcm_oss_file)1956 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1957 {
1958 int result, idx;
1959
1960 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1961 for (idx = 0; idx < 2; idx++) {
1962 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1963 result = snd_pcm_oss_get_caps1(substream, result);
1964 }
1965 result |= 0x0001; /* revision - same as SB AWE 64 */
1966 return result;
1967 }
1968
snd_pcm_oss_simulate_fill(struct snd_pcm_substream * substream,snd_pcm_uframes_t hw_ptr)1969 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1970 snd_pcm_uframes_t hw_ptr)
1971 {
1972 struct snd_pcm_runtime *runtime = substream->runtime;
1973 snd_pcm_uframes_t appl_ptr;
1974 appl_ptr = hw_ptr + runtime->buffer_size;
1975 appl_ptr %= runtime->boundary;
1976 runtime->control->appl_ptr = appl_ptr;
1977 }
1978
snd_pcm_oss_set_trigger(struct snd_pcm_oss_file * pcm_oss_file,int trigger)1979 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1980 {
1981 struct snd_pcm_runtime *runtime;
1982 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1983 int err, cmd;
1984
1985 #ifdef OSS_DEBUG
1986 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1987 #endif
1988
1989 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1990 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1991
1992 if (psubstream) {
1993 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1994 return err;
1995 }
1996 if (csubstream) {
1997 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1998 return err;
1999 }
2000 if (psubstream) {
2001 runtime = psubstream->runtime;
2002 if (trigger & PCM_ENABLE_OUTPUT) {
2003 if (runtime->oss.trigger)
2004 goto _skip1;
2005 if (atomic_read(&psubstream->mmap_count))
2006 snd_pcm_oss_simulate_fill(psubstream,
2007 get_hw_ptr_period(runtime));
2008 runtime->oss.trigger = 1;
2009 runtime->start_threshold = 1;
2010 cmd = SNDRV_PCM_IOCTL_START;
2011 } else {
2012 if (!runtime->oss.trigger)
2013 goto _skip1;
2014 runtime->oss.trigger = 0;
2015 runtime->start_threshold = runtime->boundary;
2016 cmd = SNDRV_PCM_IOCTL_DROP;
2017 runtime->oss.prepare = 1;
2018 }
2019 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2020 if (err < 0)
2021 return err;
2022 }
2023 _skip1:
2024 if (csubstream) {
2025 runtime = csubstream->runtime;
2026 if (trigger & PCM_ENABLE_INPUT) {
2027 if (runtime->oss.trigger)
2028 goto _skip2;
2029 runtime->oss.trigger = 1;
2030 runtime->start_threshold = 1;
2031 cmd = SNDRV_PCM_IOCTL_START;
2032 } else {
2033 if (!runtime->oss.trigger)
2034 goto _skip2;
2035 runtime->oss.trigger = 0;
2036 runtime->start_threshold = runtime->boundary;
2037 cmd = SNDRV_PCM_IOCTL_DROP;
2038 runtime->oss.prepare = 1;
2039 }
2040 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2041 if (err < 0)
2042 return err;
2043 }
2044 _skip2:
2045 return 0;
2046 }
2047
snd_pcm_oss_get_trigger(struct snd_pcm_oss_file * pcm_oss_file)2048 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2049 {
2050 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2051 int result = 0;
2052
2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2055 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2056 result |= PCM_ENABLE_OUTPUT;
2057 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2058 result |= PCM_ENABLE_INPUT;
2059 return result;
2060 }
2061
snd_pcm_oss_get_odelay(struct snd_pcm_oss_file * pcm_oss_file)2062 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2063 {
2064 struct snd_pcm_substream *substream;
2065 struct snd_pcm_runtime *runtime;
2066 snd_pcm_sframes_t delay;
2067 int err;
2068
2069 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2070 if (substream == NULL)
2071 return -EINVAL;
2072 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2073 return err;
2074 runtime = substream->runtime;
2075 if (runtime->oss.params || runtime->oss.prepare)
2076 return 0;
2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2078 if (err == -EPIPE)
2079 delay = 0; /* hack for broken OSS applications */
2080 else if (err < 0)
2081 return err;
2082 return snd_pcm_oss_bytes(substream, delay);
2083 }
2084
snd_pcm_oss_get_ptr(struct snd_pcm_oss_file * pcm_oss_file,int stream,struct count_info __user * _info)2085 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2086 {
2087 struct snd_pcm_substream *substream;
2088 struct snd_pcm_runtime *runtime;
2089 snd_pcm_sframes_t delay;
2090 int fixup;
2091 struct count_info info;
2092 int err;
2093
2094 if (_info == NULL)
2095 return -EFAULT;
2096 substream = pcm_oss_file->streams[stream];
2097 if (substream == NULL)
2098 return -EINVAL;
2099 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2100 return err;
2101 runtime = substream->runtime;
2102 if (runtime->oss.params || runtime->oss.prepare) {
2103 memset(&info, 0, sizeof(info));
2104 if (copy_to_user(_info, &info, sizeof(info)))
2105 return -EFAULT;
2106 return 0;
2107 }
2108 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2110 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2111 err = 0;
2112 delay = 0;
2113 fixup = 0;
2114 } else {
2115 fixup = runtime->oss.buffer_used;
2116 }
2117 } else {
2118 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2119 fixup = -runtime->oss.buffer_used;
2120 }
2121 if (err < 0)
2122 return err;
2123 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2124 if (atomic_read(&substream->mmap_count)) {
2125 snd_pcm_sframes_t n;
2126 delay = get_hw_ptr_period(runtime);
2127 n = delay - runtime->oss.prev_hw_ptr_period;
2128 if (n < 0)
2129 n += runtime->boundary;
2130 info.blocks = n / runtime->period_size;
2131 runtime->oss.prev_hw_ptr_period = delay;
2132 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2133 snd_pcm_oss_simulate_fill(substream, delay);
2134 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2135 } else {
2136 delay = snd_pcm_oss_bytes(substream, delay);
2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2138 if (substream->oss.setup.buggyptr)
2139 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2140 else
2141 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2142 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2143 } else {
2144 delay += fixup;
2145 info.blocks = delay / runtime->oss.period_bytes;
2146 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2147 }
2148 }
2149 if (copy_to_user(_info, &info, sizeof(info)))
2150 return -EFAULT;
2151 return 0;
2152 }
2153
snd_pcm_oss_get_space(struct snd_pcm_oss_file * pcm_oss_file,int stream,struct audio_buf_info __user * _info)2154 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2155 {
2156 struct snd_pcm_substream *substream;
2157 struct snd_pcm_runtime *runtime;
2158 snd_pcm_sframes_t avail;
2159 int fixup;
2160 struct audio_buf_info info;
2161 int err;
2162
2163 if (_info == NULL)
2164 return -EFAULT;
2165 substream = pcm_oss_file->streams[stream];
2166 if (substream == NULL)
2167 return -EINVAL;
2168 runtime = substream->runtime;
2169
2170 if (runtime->oss.params &&
2171 (err = snd_pcm_oss_change_params(substream)) < 0)
2172 return err;
2173
2174 info.fragsize = runtime->oss.period_bytes;
2175 info.fragstotal = runtime->periods;
2176 if (runtime->oss.prepare) {
2177 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2178 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2179 info.fragments = runtime->oss.periods;
2180 } else {
2181 info.bytes = 0;
2182 info.fragments = 0;
2183 }
2184 } else {
2185 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2187 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2188 avail = runtime->buffer_size;
2189 err = 0;
2190 fixup = 0;
2191 } else {
2192 avail = runtime->buffer_size - avail;
2193 fixup = -runtime->oss.buffer_used;
2194 }
2195 } else {
2196 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2197 fixup = runtime->oss.buffer_used;
2198 }
2199 if (err < 0)
2200 return err;
2201 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2202 info.fragments = info.bytes / runtime->oss.period_bytes;
2203 }
2204
2205 #ifdef OSS_DEBUG
2206 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2207 "fragstotal = %i, fragsize = %i\n",
2208 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2209 #endif
2210 if (copy_to_user(_info, &info, sizeof(info)))
2211 return -EFAULT;
2212 return 0;
2213 }
2214
snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file * pcm_oss_file,int stream,struct buffmem_desc __user * _info)2215 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2216 {
2217 // it won't be probably implemented
2218 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2219 return -EINVAL;
2220 }
2221
strip_task_path(const char * path)2222 static const char *strip_task_path(const char *path)
2223 {
2224 const char *ptr, *ptrl = NULL;
2225 for (ptr = path; *ptr; ptr++) {
2226 if (*ptr == '/')
2227 ptrl = ptr + 1;
2228 }
2229 return ptrl;
2230 }
2231
snd_pcm_oss_look_for_setup(struct snd_pcm * pcm,int stream,const char * task_name,struct snd_pcm_oss_setup * rsetup)2232 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2233 const char *task_name,
2234 struct snd_pcm_oss_setup *rsetup)
2235 {
2236 struct snd_pcm_oss_setup *setup;
2237
2238 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2239 do {
2240 for (setup = pcm->streams[stream].oss.setup_list; setup;
2241 setup = setup->next) {
2242 if (!strcmp(setup->task_name, task_name))
2243 goto out;
2244 }
2245 } while ((task_name = strip_task_path(task_name)) != NULL);
2246 out:
2247 if (setup)
2248 *rsetup = *setup;
2249 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2250 }
2251
snd_pcm_oss_release_substream(struct snd_pcm_substream * substream)2252 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2253 {
2254 struct snd_pcm_runtime *runtime;
2255 runtime = substream->runtime;
2256 vfree(runtime->oss.buffer);
2257 runtime->oss.buffer = NULL;
2258 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2259 snd_pcm_oss_plugin_clear(substream);
2260 #endif
2261 substream->oss.oss = 0;
2262 }
2263
snd_pcm_oss_init_substream(struct snd_pcm_substream * substream,struct snd_pcm_oss_setup * setup,int minor)2264 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2265 struct snd_pcm_oss_setup *setup,
2266 int minor)
2267 {
2268 struct snd_pcm_runtime *runtime;
2269
2270 substream->oss.oss = 1;
2271 substream->oss.setup = *setup;
2272 if (setup->nonblock)
2273 substream->f_flags |= O_NONBLOCK;
2274 else if (setup->block)
2275 substream->f_flags &= ~O_NONBLOCK;
2276 runtime = substream->runtime;
2277 runtime->oss.params = 1;
2278 runtime->oss.trigger = 1;
2279 runtime->oss.rate = 8000;
2280 mutex_init(&runtime->oss.params_lock);
2281 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2282 case SNDRV_MINOR_OSS_PCM_8:
2283 runtime->oss.format = AFMT_U8;
2284 break;
2285 case SNDRV_MINOR_OSS_PCM_16:
2286 runtime->oss.format = AFMT_S16_LE;
2287 break;
2288 default:
2289 runtime->oss.format = AFMT_MU_LAW;
2290 }
2291 runtime->oss.channels = 1;
2292 runtime->oss.fragshift = 0;
2293 runtime->oss.maxfrags = 0;
2294 runtime->oss.subdivision = 0;
2295 substream->pcm_release = snd_pcm_oss_release_substream;
2296 }
2297
snd_pcm_oss_release_file(struct snd_pcm_oss_file * pcm_oss_file)2298 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2299 {
2300 int cidx;
2301 if (!pcm_oss_file)
2302 return 0;
2303 for (cidx = 0; cidx < 2; ++cidx) {
2304 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2305 if (substream)
2306 snd_pcm_release_substream(substream);
2307 }
2308 kfree(pcm_oss_file);
2309 return 0;
2310 }
2311
snd_pcm_oss_open_file(struct file * file,struct snd_pcm * pcm,struct snd_pcm_oss_file ** rpcm_oss_file,int minor,struct snd_pcm_oss_setup * setup)2312 static int snd_pcm_oss_open_file(struct file *file,
2313 struct snd_pcm *pcm,
2314 struct snd_pcm_oss_file **rpcm_oss_file,
2315 int minor,
2316 struct snd_pcm_oss_setup *setup)
2317 {
2318 int idx, err;
2319 struct snd_pcm_oss_file *pcm_oss_file;
2320 struct snd_pcm_substream *substream;
2321 fmode_t f_mode = file->f_mode;
2322
2323 if (rpcm_oss_file)
2324 *rpcm_oss_file = NULL;
2325
2326 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2327 if (pcm_oss_file == NULL)
2328 return -ENOMEM;
2329
2330 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2331 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2332 f_mode = FMODE_WRITE;
2333
2334 file->f_flags &= ~O_APPEND;
2335 for (idx = 0; idx < 2; idx++) {
2336 if (setup[idx].disable)
2337 continue;
2338 if (! pcm->streams[idx].substream_count)
2339 continue; /* no matching substream */
2340 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2341 if (! (f_mode & FMODE_WRITE))
2342 continue;
2343 } else {
2344 if (! (f_mode & FMODE_READ))
2345 continue;
2346 }
2347 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2348 if (err < 0) {
2349 snd_pcm_oss_release_file(pcm_oss_file);
2350 return err;
2351 }
2352
2353 pcm_oss_file->streams[idx] = substream;
2354 substream->file = pcm_oss_file;
2355 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2356 }
2357
2358 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2359 snd_pcm_oss_release_file(pcm_oss_file);
2360 return -EINVAL;
2361 }
2362
2363 file->private_data = pcm_oss_file;
2364 if (rpcm_oss_file)
2365 *rpcm_oss_file = pcm_oss_file;
2366 return 0;
2367 }
2368
2369
snd_task_name(struct task_struct * task,char * name,size_t size)2370 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2371 {
2372 unsigned int idx;
2373
2374 if (snd_BUG_ON(!task || !name || size < 2))
2375 return -EINVAL;
2376 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2377 name[idx] = task->comm[idx];
2378 name[idx] = '\0';
2379 return 0;
2380 }
2381
snd_pcm_oss_open(struct inode * inode,struct file * file)2382 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2383 {
2384 int err;
2385 char task_name[32];
2386 struct snd_pcm *pcm;
2387 struct snd_pcm_oss_file *pcm_oss_file;
2388 struct snd_pcm_oss_setup setup[2];
2389 int nonblock;
2390 wait_queue_t wait;
2391
2392 err = nonseekable_open(inode, file);
2393 if (err < 0)
2394 return err;
2395
2396 pcm = snd_lookup_oss_minor_data(iminor(inode),
2397 SNDRV_OSS_DEVICE_TYPE_PCM);
2398 if (pcm == NULL) {
2399 err = -ENODEV;
2400 goto __error1;
2401 }
2402 err = snd_card_file_add(pcm->card, file);
2403 if (err < 0)
2404 goto __error1;
2405 if (!try_module_get(pcm->card->module)) {
2406 err = -EFAULT;
2407 goto __error2;
2408 }
2409 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2410 err = -EFAULT;
2411 goto __error;
2412 }
2413 memset(setup, 0, sizeof(setup));
2414 if (file->f_mode & FMODE_WRITE)
2415 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2416 task_name, &setup[0]);
2417 if (file->f_mode & FMODE_READ)
2418 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2419 task_name, &setup[1]);
2420
2421 nonblock = !!(file->f_flags & O_NONBLOCK);
2422 if (!nonblock)
2423 nonblock = nonblock_open;
2424
2425 init_waitqueue_entry(&wait, current);
2426 add_wait_queue(&pcm->open_wait, &wait);
2427 mutex_lock(&pcm->open_mutex);
2428 while (1) {
2429 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2430 iminor(inode), setup);
2431 if (err >= 0)
2432 break;
2433 if (err == -EAGAIN) {
2434 if (nonblock) {
2435 err = -EBUSY;
2436 break;
2437 }
2438 } else
2439 break;
2440 set_current_state(TASK_INTERRUPTIBLE);
2441 mutex_unlock(&pcm->open_mutex);
2442 schedule();
2443 mutex_lock(&pcm->open_mutex);
2444 if (pcm->card->shutdown) {
2445 err = -ENODEV;
2446 break;
2447 }
2448 if (signal_pending(current)) {
2449 err = -ERESTARTSYS;
2450 break;
2451 }
2452 }
2453 remove_wait_queue(&pcm->open_wait, &wait);
2454 mutex_unlock(&pcm->open_mutex);
2455 if (err < 0)
2456 goto __error;
2457 snd_card_unref(pcm->card);
2458 return err;
2459
2460 __error:
2461 module_put(pcm->card->module);
2462 __error2:
2463 snd_card_file_remove(pcm->card, file);
2464 __error1:
2465 if (pcm)
2466 snd_card_unref(pcm->card);
2467 return err;
2468 }
2469
snd_pcm_oss_release(struct inode * inode,struct file * file)2470 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2471 {
2472 struct snd_pcm *pcm;
2473 struct snd_pcm_substream *substream;
2474 struct snd_pcm_oss_file *pcm_oss_file;
2475
2476 pcm_oss_file = file->private_data;
2477 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2478 if (substream == NULL)
2479 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2480 if (snd_BUG_ON(!substream))
2481 return -ENXIO;
2482 pcm = substream->pcm;
2483 if (!pcm->card->shutdown)
2484 snd_pcm_oss_sync(pcm_oss_file);
2485 mutex_lock(&pcm->open_mutex);
2486 snd_pcm_oss_release_file(pcm_oss_file);
2487 mutex_unlock(&pcm->open_mutex);
2488 wake_up(&pcm->open_wait);
2489 module_put(pcm->card->module);
2490 snd_card_file_remove(pcm->card, file);
2491 return 0;
2492 }
2493
snd_pcm_oss_ioctl(struct file * file,unsigned int cmd,unsigned long arg)2494 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2495 {
2496 struct snd_pcm_oss_file *pcm_oss_file;
2497 int __user *p = (int __user *)arg;
2498 int res;
2499
2500 pcm_oss_file = file->private_data;
2501 if (cmd == OSS_GETVERSION)
2502 return put_user(SNDRV_OSS_VERSION, p);
2503 if (cmd == OSS_ALSAEMULVER)
2504 return put_user(1, p);
2505 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2506 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2507 struct snd_pcm_substream *substream;
2508 int idx;
2509 for (idx = 0; idx < 2; ++idx) {
2510 substream = pcm_oss_file->streams[idx];
2511 if (substream != NULL)
2512 break;
2513 }
2514 if (snd_BUG_ON(idx >= 2))
2515 return -ENXIO;
2516 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2517 }
2518 #endif
2519 if (((cmd >> 8) & 0xff) != 'P')
2520 return -EINVAL;
2521 #ifdef OSS_DEBUG
2522 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
2523 #endif
2524 switch (cmd) {
2525 case SNDCTL_DSP_RESET:
2526 return snd_pcm_oss_reset(pcm_oss_file);
2527 case SNDCTL_DSP_SYNC:
2528 return snd_pcm_oss_sync(pcm_oss_file);
2529 case SNDCTL_DSP_SPEED:
2530 if (get_user(res, p))
2531 return -EFAULT;
2532 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2533 return res;
2534 return put_user(res, p);
2535 case SOUND_PCM_READ_RATE:
2536 res = snd_pcm_oss_get_rate(pcm_oss_file);
2537 if (res < 0)
2538 return res;
2539 return put_user(res, p);
2540 case SNDCTL_DSP_STEREO:
2541 if (get_user(res, p))
2542 return -EFAULT;
2543 res = res > 0 ? 2 : 1;
2544 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2545 return res;
2546 return put_user(--res, p);
2547 case SNDCTL_DSP_GETBLKSIZE:
2548 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2549 if (res < 0)
2550 return res;
2551 return put_user(res, p);
2552 case SNDCTL_DSP_SETFMT:
2553 if (get_user(res, p))
2554 return -EFAULT;
2555 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2556 if (res < 0)
2557 return res;
2558 return put_user(res, p);
2559 case SOUND_PCM_READ_BITS:
2560 res = snd_pcm_oss_get_format(pcm_oss_file);
2561 if (res < 0)
2562 return res;
2563 return put_user(res, p);
2564 case SNDCTL_DSP_CHANNELS:
2565 if (get_user(res, p))
2566 return -EFAULT;
2567 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2568 if (res < 0)
2569 return res;
2570 return put_user(res, p);
2571 case SOUND_PCM_READ_CHANNELS:
2572 res = snd_pcm_oss_get_channels(pcm_oss_file);
2573 if (res < 0)
2574 return res;
2575 return put_user(res, p);
2576 case SOUND_PCM_WRITE_FILTER:
2577 case SOUND_PCM_READ_FILTER:
2578 return -EIO;
2579 case SNDCTL_DSP_POST:
2580 return snd_pcm_oss_post(pcm_oss_file);
2581 case SNDCTL_DSP_SUBDIVIDE:
2582 if (get_user(res, p))
2583 return -EFAULT;
2584 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2585 if (res < 0)
2586 return res;
2587 return put_user(res, p);
2588 case SNDCTL_DSP_SETFRAGMENT:
2589 if (get_user(res, p))
2590 return -EFAULT;
2591 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2592 case SNDCTL_DSP_GETFMTS:
2593 res = snd_pcm_oss_get_formats(pcm_oss_file);
2594 if (res < 0)
2595 return res;
2596 return put_user(res, p);
2597 case SNDCTL_DSP_GETOSPACE:
2598 case SNDCTL_DSP_GETISPACE:
2599 return snd_pcm_oss_get_space(pcm_oss_file,
2600 cmd == SNDCTL_DSP_GETISPACE ?
2601 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2602 (struct audio_buf_info __user *) arg);
2603 case SNDCTL_DSP_NONBLOCK:
2604 return snd_pcm_oss_nonblock(file);
2605 case SNDCTL_DSP_GETCAPS:
2606 res = snd_pcm_oss_get_caps(pcm_oss_file);
2607 if (res < 0)
2608 return res;
2609 return put_user(res, p);
2610 case SNDCTL_DSP_GETTRIGGER:
2611 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2612 if (res < 0)
2613 return res;
2614 return put_user(res, p);
2615 case SNDCTL_DSP_SETTRIGGER:
2616 if (get_user(res, p))
2617 return -EFAULT;
2618 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2619 case SNDCTL_DSP_GETIPTR:
2620 case SNDCTL_DSP_GETOPTR:
2621 return snd_pcm_oss_get_ptr(pcm_oss_file,
2622 cmd == SNDCTL_DSP_GETIPTR ?
2623 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2624 (struct count_info __user *) arg);
2625 case SNDCTL_DSP_MAPINBUF:
2626 case SNDCTL_DSP_MAPOUTBUF:
2627 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2628 cmd == SNDCTL_DSP_MAPINBUF ?
2629 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2630 (struct buffmem_desc __user *) arg);
2631 case SNDCTL_DSP_SETSYNCRO:
2632 /* stop DMA now.. */
2633 return 0;
2634 case SNDCTL_DSP_SETDUPLEX:
2635 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2636 return 0;
2637 return -EIO;
2638 case SNDCTL_DSP_GETODELAY:
2639 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2640 if (res < 0) {
2641 /* it's for sure, some broken apps don't check for error codes */
2642 put_user(0, p);
2643 return res;
2644 }
2645 return put_user(res, p);
2646 case SNDCTL_DSP_PROFILE:
2647 return 0; /* silently ignore */
2648 default:
2649 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2650 }
2651 return -EINVAL;
2652 }
2653
2654 #ifdef CONFIG_COMPAT
2655 /* all compatible */
2656 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2657 #else
2658 #define snd_pcm_oss_ioctl_compat NULL
2659 #endif
2660
snd_pcm_oss_read(struct file * file,char __user * buf,size_t count,loff_t * offset)2661 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2662 {
2663 struct snd_pcm_oss_file *pcm_oss_file;
2664 struct snd_pcm_substream *substream;
2665
2666 pcm_oss_file = file->private_data;
2667 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2668 if (substream == NULL)
2669 return -ENXIO;
2670 substream->f_flags = file->f_flags & O_NONBLOCK;
2671 #ifndef OSS_DEBUG
2672 return snd_pcm_oss_read1(substream, buf, count);
2673 #else
2674 {
2675 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2676 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2677 "(returned %li bytes)\n", (long)count, (long)res);
2678 return res;
2679 }
2680 #endif
2681 }
2682
snd_pcm_oss_write(struct file * file,const char __user * buf,size_t count,loff_t * offset)2683 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2684 {
2685 struct snd_pcm_oss_file *pcm_oss_file;
2686 struct snd_pcm_substream *substream;
2687 long result;
2688
2689 pcm_oss_file = file->private_data;
2690 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2691 if (substream == NULL)
2692 return -ENXIO;
2693 substream->f_flags = file->f_flags & O_NONBLOCK;
2694 result = snd_pcm_oss_write1(substream, buf, count);
2695 #ifdef OSS_DEBUG
2696 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2697 (long)count, (long)result);
2698 #endif
2699 return result;
2700 }
2701
snd_pcm_oss_playback_ready(struct snd_pcm_substream * substream)2702 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2703 {
2704 struct snd_pcm_runtime *runtime = substream->runtime;
2705 if (atomic_read(&substream->mmap_count))
2706 return runtime->oss.prev_hw_ptr_period !=
2707 get_hw_ptr_period(runtime);
2708 else
2709 return snd_pcm_playback_avail(runtime) >=
2710 runtime->oss.period_frames;
2711 }
2712
snd_pcm_oss_capture_ready(struct snd_pcm_substream * substream)2713 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2714 {
2715 struct snd_pcm_runtime *runtime = substream->runtime;
2716 if (atomic_read(&substream->mmap_count))
2717 return runtime->oss.prev_hw_ptr_period !=
2718 get_hw_ptr_period(runtime);
2719 else
2720 return snd_pcm_capture_avail(runtime) >=
2721 runtime->oss.period_frames;
2722 }
2723
snd_pcm_oss_poll(struct file * file,poll_table * wait)2724 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2725 {
2726 struct snd_pcm_oss_file *pcm_oss_file;
2727 unsigned int mask;
2728 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2729
2730 pcm_oss_file = file->private_data;
2731
2732 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2733 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2734
2735 mask = 0;
2736 if (psubstream != NULL) {
2737 struct snd_pcm_runtime *runtime = psubstream->runtime;
2738 poll_wait(file, &runtime->sleep, wait);
2739 snd_pcm_stream_lock_irq(psubstream);
2740 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2741 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2742 snd_pcm_oss_playback_ready(psubstream)))
2743 mask |= POLLOUT | POLLWRNORM;
2744 snd_pcm_stream_unlock_irq(psubstream);
2745 }
2746 if (csubstream != NULL) {
2747 struct snd_pcm_runtime *runtime = csubstream->runtime;
2748 snd_pcm_state_t ostate;
2749 poll_wait(file, &runtime->sleep, wait);
2750 snd_pcm_stream_lock_irq(csubstream);
2751 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2752 snd_pcm_oss_capture_ready(csubstream))
2753 mask |= POLLIN | POLLRDNORM;
2754 snd_pcm_stream_unlock_irq(csubstream);
2755 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2756 struct snd_pcm_oss_file ofile;
2757 memset(&ofile, 0, sizeof(ofile));
2758 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2759 runtime->oss.trigger = 0;
2760 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2761 }
2762 }
2763
2764 return mask;
2765 }
2766
snd_pcm_oss_mmap(struct file * file,struct vm_area_struct * area)2767 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2768 {
2769 struct snd_pcm_oss_file *pcm_oss_file;
2770 struct snd_pcm_substream *substream = NULL;
2771 struct snd_pcm_runtime *runtime;
2772 int err;
2773
2774 #ifdef OSS_DEBUG
2775 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
2776 #endif
2777 pcm_oss_file = file->private_data;
2778 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2779 case VM_READ | VM_WRITE:
2780 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2781 if (substream)
2782 break;
2783 /* Fall through */
2784 case VM_READ:
2785 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2786 break;
2787 case VM_WRITE:
2788 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2789 break;
2790 default:
2791 return -EINVAL;
2792 }
2793 /* set VM_READ access as well to fix memset() routines that do
2794 reads before writes (to improve performance) */
2795 area->vm_flags |= VM_READ;
2796 if (substream == NULL)
2797 return -ENXIO;
2798 runtime = substream->runtime;
2799 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2800 return -EIO;
2801 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2802 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2803 else
2804 return -EIO;
2805
2806 if (runtime->oss.params) {
2807 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2808 return err;
2809 }
2810 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2811 if (runtime->oss.plugin_first != NULL)
2812 return -EIO;
2813 #endif
2814
2815 if (area->vm_pgoff != 0)
2816 return -EINVAL;
2817
2818 err = snd_pcm_mmap_data(substream, file, area);
2819 if (err < 0)
2820 return err;
2821 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2822 runtime->silence_threshold = 0;
2823 runtime->silence_size = 0;
2824 #ifdef OSS_DEBUG
2825 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2826 runtime->oss.mmap_bytes);
2827 #endif
2828 /* In mmap mode we never stop */
2829 runtime->stop_threshold = runtime->boundary;
2830
2831 return 0;
2832 }
2833
2834 #ifdef CONFIG_SND_VERBOSE_PROCFS
2835 /*
2836 * /proc interface
2837 */
2838
snd_pcm_oss_proc_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)2839 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2840 struct snd_info_buffer *buffer)
2841 {
2842 struct snd_pcm_str *pstr = entry->private_data;
2843 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2844 mutex_lock(&pstr->oss.setup_mutex);
2845 while (setup) {
2846 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2847 setup->task_name,
2848 setup->periods,
2849 setup->period_size,
2850 setup->disable ? " disable" : "",
2851 setup->direct ? " direct" : "",
2852 setup->block ? " block" : "",
2853 setup->nonblock ? " non-block" : "",
2854 setup->partialfrag ? " partial-frag" : "",
2855 setup->nosilence ? " no-silence" : "");
2856 setup = setup->next;
2857 }
2858 mutex_unlock(&pstr->oss.setup_mutex);
2859 }
2860
snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)2861 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2862 {
2863 struct snd_pcm_oss_setup *setup, *setupn;
2864
2865 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2866 setup; setup = setupn) {
2867 setupn = setup->next;
2868 kfree(setup->task_name);
2869 kfree(setup);
2870 }
2871 pstr->oss.setup_list = NULL;
2872 }
2873
snd_pcm_oss_proc_write(struct snd_info_entry * entry,struct snd_info_buffer * buffer)2874 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2875 struct snd_info_buffer *buffer)
2876 {
2877 struct snd_pcm_str *pstr = entry->private_data;
2878 char line[128], str[32], task_name[32];
2879 const char *ptr;
2880 int idx1;
2881 struct snd_pcm_oss_setup *setup, *setup1, template;
2882
2883 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2884 mutex_lock(&pstr->oss.setup_mutex);
2885 memset(&template, 0, sizeof(template));
2886 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2887 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2888 snd_pcm_oss_proc_free_setup_list(pstr);
2889 mutex_unlock(&pstr->oss.setup_mutex);
2890 continue;
2891 }
2892 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2893 if (!strcmp(setup->task_name, task_name)) {
2894 template = *setup;
2895 break;
2896 }
2897 }
2898 ptr = snd_info_get_str(str, ptr, sizeof(str));
2899 template.periods = simple_strtoul(str, NULL, 10);
2900 ptr = snd_info_get_str(str, ptr, sizeof(str));
2901 template.period_size = simple_strtoul(str, NULL, 10);
2902 for (idx1 = 31; idx1 >= 0; idx1--)
2903 if (template.period_size & (1 << idx1))
2904 break;
2905 for (idx1--; idx1 >= 0; idx1--)
2906 template.period_size &= ~(1 << idx1);
2907 do {
2908 ptr = snd_info_get_str(str, ptr, sizeof(str));
2909 if (!strcmp(str, "disable")) {
2910 template.disable = 1;
2911 } else if (!strcmp(str, "direct")) {
2912 template.direct = 1;
2913 } else if (!strcmp(str, "block")) {
2914 template.block = 1;
2915 } else if (!strcmp(str, "non-block")) {
2916 template.nonblock = 1;
2917 } else if (!strcmp(str, "partial-frag")) {
2918 template.partialfrag = 1;
2919 } else if (!strcmp(str, "no-silence")) {
2920 template.nosilence = 1;
2921 } else if (!strcmp(str, "buggy-ptr")) {
2922 template.buggyptr = 1;
2923 }
2924 } while (*str);
2925 if (setup == NULL) {
2926 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2927 if (! setup) {
2928 buffer->error = -ENOMEM;
2929 mutex_unlock(&pstr->oss.setup_mutex);
2930 return;
2931 }
2932 if (pstr->oss.setup_list == NULL)
2933 pstr->oss.setup_list = setup;
2934 else {
2935 for (setup1 = pstr->oss.setup_list;
2936 setup1->next; setup1 = setup1->next);
2937 setup1->next = setup;
2938 }
2939 template.task_name = kstrdup(task_name, GFP_KERNEL);
2940 if (! template.task_name) {
2941 kfree(setup);
2942 buffer->error = -ENOMEM;
2943 mutex_unlock(&pstr->oss.setup_mutex);
2944 return;
2945 }
2946 }
2947 *setup = template;
2948 mutex_unlock(&pstr->oss.setup_mutex);
2949 }
2950 }
2951
snd_pcm_oss_proc_init(struct snd_pcm * pcm)2952 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2953 {
2954 int stream;
2955 for (stream = 0; stream < 2; ++stream) {
2956 struct snd_info_entry *entry;
2957 struct snd_pcm_str *pstr = &pcm->streams[stream];
2958 if (pstr->substream_count == 0)
2959 continue;
2960 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2961 entry->content = SNDRV_INFO_CONTENT_TEXT;
2962 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2963 entry->c.text.read = snd_pcm_oss_proc_read;
2964 entry->c.text.write = snd_pcm_oss_proc_write;
2965 entry->private_data = pstr;
2966 if (snd_info_register(entry) < 0) {
2967 snd_info_free_entry(entry);
2968 entry = NULL;
2969 }
2970 }
2971 pstr->oss.proc_entry = entry;
2972 }
2973 }
2974
snd_pcm_oss_proc_done(struct snd_pcm * pcm)2975 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2976 {
2977 int stream;
2978 for (stream = 0; stream < 2; ++stream) {
2979 struct snd_pcm_str *pstr = &pcm->streams[stream];
2980 snd_info_free_entry(pstr->oss.proc_entry);
2981 pstr->oss.proc_entry = NULL;
2982 snd_pcm_oss_proc_free_setup_list(pstr);
2983 }
2984 }
2985 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2986 #define snd_pcm_oss_proc_init(pcm)
2987 #define snd_pcm_oss_proc_done(pcm)
2988 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2989
2990 /*
2991 * ENTRY functions
2992 */
2993
2994 static const struct file_operations snd_pcm_oss_f_reg =
2995 {
2996 .owner = THIS_MODULE,
2997 .read = snd_pcm_oss_read,
2998 .write = snd_pcm_oss_write,
2999 .open = snd_pcm_oss_open,
3000 .release = snd_pcm_oss_release,
3001 .llseek = no_llseek,
3002 .poll = snd_pcm_oss_poll,
3003 .unlocked_ioctl = snd_pcm_oss_ioctl,
3004 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3005 .mmap = snd_pcm_oss_mmap,
3006 };
3007
register_oss_dsp(struct snd_pcm * pcm,int index)3008 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3009 {
3010 char name[128];
3011 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3012 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3013 pcm->card, index, &snd_pcm_oss_f_reg,
3014 pcm, name) < 0) {
3015 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3016 pcm->card->number, pcm->device);
3017 }
3018 }
3019
snd_pcm_oss_register_minor(struct snd_pcm * pcm)3020 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3021 {
3022 pcm->oss.reg = 0;
3023 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3024 char name[128];
3025 int duplex;
3026 register_oss_dsp(pcm, 0);
3027 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3028 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3029 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3030 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3031 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3032 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3033 pcm->card->number,
3034 name);
3035 #endif
3036 pcm->oss.reg++;
3037 pcm->oss.reg_mask |= 1;
3038 }
3039 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3040 register_oss_dsp(pcm, 1);
3041 pcm->oss.reg++;
3042 pcm->oss.reg_mask |= 2;
3043 }
3044
3045 if (pcm->oss.reg)
3046 snd_pcm_oss_proc_init(pcm);
3047
3048 return 0;
3049 }
3050
snd_pcm_oss_disconnect_minor(struct snd_pcm * pcm)3051 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3052 {
3053 if (pcm->oss.reg) {
3054 if (pcm->oss.reg_mask & 1) {
3055 pcm->oss.reg_mask &= ~1;
3056 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3057 pcm->card, 0);
3058 }
3059 if (pcm->oss.reg_mask & 2) {
3060 pcm->oss.reg_mask &= ~2;
3061 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3062 pcm->card, 1);
3063 }
3064 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3065 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3066 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3067 #endif
3068 }
3069 pcm->oss.reg = 0;
3070 }
3071 return 0;
3072 }
3073
snd_pcm_oss_unregister_minor(struct snd_pcm * pcm)3074 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3075 {
3076 snd_pcm_oss_disconnect_minor(pcm);
3077 snd_pcm_oss_proc_done(pcm);
3078 return 0;
3079 }
3080
3081 static struct snd_pcm_notify snd_pcm_oss_notify =
3082 {
3083 .n_register = snd_pcm_oss_register_minor,
3084 .n_disconnect = snd_pcm_oss_disconnect_minor,
3085 .n_unregister = snd_pcm_oss_unregister_minor,
3086 };
3087
alsa_pcm_oss_init(void)3088 static int __init alsa_pcm_oss_init(void)
3089 {
3090 int i;
3091 int err;
3092
3093 /* check device map table */
3094 for (i = 0; i < SNDRV_CARDS; i++) {
3095 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3096 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3097 i, dsp_map[i]);
3098 dsp_map[i] = 0;
3099 }
3100 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3101 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3102 i, adsp_map[i]);
3103 adsp_map[i] = 1;
3104 }
3105 }
3106 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3107 return err;
3108 return 0;
3109 }
3110
alsa_pcm_oss_exit(void)3111 static void __exit alsa_pcm_oss_exit(void)
3112 {
3113 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3114 }
3115
3116 module_init(alsa_pcm_oss_init)
3117 module_exit(alsa_pcm_oss_exit)
3118