1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Digital Audio (PCM) abstract layer / OSS compatible |
4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
5 | */ |
6 | |
7 | #if 0 |
8 | #define PLUGIN_DEBUG |
9 | #endif |
10 | #if 0 |
11 | #define OSS_DEBUG |
12 | #endif |
13 | |
14 | #include <linux/init.h> |
15 | #include <linux/slab.h> |
16 | #include <linux/sched/signal.h> |
17 | #include <linux/time.h> |
18 | #include <linux/vmalloc.h> |
19 | #include <linux/module.h> |
20 | #include <linux/math64.h> |
21 | #include <linux/string.h> |
22 | #include <linux/compat.h> |
23 | #include <sound/core.h> |
24 | #include <sound/minors.h> |
25 | #include <sound/pcm.h> |
26 | #include <sound/pcm_params.h> |
27 | #include "pcm_plugin.h" |
28 | #include <sound/info.h> |
29 | #include <linux/soundcard.h> |
30 | #include <sound/initval.h> |
31 | #include <sound/mixer_oss.h> |
32 | |
33 | #define OSS_ALSAEMULVER _SIOR ('M', 249, int) |
34 | |
35 | static int dsp_map[SNDRV_CARDS]; |
36 | static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
37 | static bool nonblock_open = 1; |
38 | |
39 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>" ); |
40 | MODULE_DESCRIPTION("PCM OSS emulation for ALSA." ); |
41 | MODULE_LICENSE("GPL" ); |
42 | module_param_array(dsp_map, int, NULL, 0444); |
43 | MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device." ); |
44 | module_param_array(adsp_map, int, NULL, 0444); |
45 | MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device." ); |
46 | module_param(nonblock_open, bool, 0644); |
47 | MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices." ); |
48 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); |
49 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); |
50 | |
51 | static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); |
52 | static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); |
53 | static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); |
54 | |
55 | /* |
56 | * helper functions to process hw_params |
57 | */ |
58 | static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) |
59 | { |
60 | int changed = 0; |
61 | if (i->min < min) { |
62 | i->min = min; |
63 | i->openmin = openmin; |
64 | changed = 1; |
65 | } else if (i->min == min && !i->openmin && openmin) { |
66 | i->openmin = 1; |
67 | changed = 1; |
68 | } |
69 | if (i->integer) { |
70 | if (i->openmin) { |
71 | i->min++; |
72 | i->openmin = 0; |
73 | } |
74 | } |
75 | if (snd_interval_checkempty(i)) { |
76 | snd_interval_none(i); |
77 | return -EINVAL; |
78 | } |
79 | return changed; |
80 | } |
81 | |
82 | static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) |
83 | { |
84 | int changed = 0; |
85 | if (i->max > max) { |
86 | i->max = max; |
87 | i->openmax = openmax; |
88 | changed = 1; |
89 | } else if (i->max == max && !i->openmax && openmax) { |
90 | i->openmax = 1; |
91 | changed = 1; |
92 | } |
93 | if (i->integer) { |
94 | if (i->openmax) { |
95 | i->max--; |
96 | i->openmax = 0; |
97 | } |
98 | } |
99 | if (snd_interval_checkempty(i)) { |
100 | snd_interval_none(i); |
101 | return -EINVAL; |
102 | } |
103 | return changed; |
104 | } |
105 | |
106 | static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) |
107 | { |
108 | struct snd_interval t; |
109 | t.empty = 0; |
110 | t.min = t.max = val; |
111 | t.openmin = t.openmax = 0; |
112 | t.integer = 1; |
113 | return snd_interval_refine(i, v: &t); |
114 | } |
115 | |
116 | /** |
117 | * snd_pcm_hw_param_value_min |
118 | * @params: the hw_params instance |
119 | * @var: parameter to retrieve |
120 | * @dir: pointer to the direction (-1,0,1) or NULL |
121 | * |
122 | * Return the minimum value for field PAR. |
123 | */ |
124 | static unsigned int |
125 | snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, |
126 | snd_pcm_hw_param_t var, int *dir) |
127 | { |
128 | if (hw_is_mask(var)) { |
129 | if (dir) |
130 | *dir = 0; |
131 | return snd_mask_min(mask: hw_param_mask_c(params, var)); |
132 | } |
133 | if (hw_is_interval(var)) { |
134 | const struct snd_interval *i = hw_param_interval_c(params, var); |
135 | if (dir) |
136 | *dir = i->openmin; |
137 | return snd_interval_min(i); |
138 | } |
139 | return -EINVAL; |
140 | } |
141 | |
142 | /** |
143 | * snd_pcm_hw_param_value_max |
144 | * @params: the hw_params instance |
145 | * @var: parameter to retrieve |
146 | * @dir: pointer to the direction (-1,0,1) or NULL |
147 | * |
148 | * Return the maximum value for field PAR. |
149 | */ |
150 | static int |
151 | snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, |
152 | snd_pcm_hw_param_t var, int *dir) |
153 | { |
154 | if (hw_is_mask(var)) { |
155 | if (dir) |
156 | *dir = 0; |
157 | return snd_mask_max(mask: hw_param_mask_c(params, var)); |
158 | } |
159 | if (hw_is_interval(var)) { |
160 | const struct snd_interval *i = hw_param_interval_c(params, var); |
161 | if (dir) |
162 | *dir = - (int) i->openmax; |
163 | return snd_interval_max(i); |
164 | } |
165 | return -EINVAL; |
166 | } |
167 | |
168 | static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, |
169 | snd_pcm_hw_param_t var, |
170 | const struct snd_mask *val) |
171 | { |
172 | int changed; |
173 | changed = snd_mask_refine(mask: hw_param_mask(params, var), v: val); |
174 | if (changed > 0) { |
175 | params->cmask |= 1 << var; |
176 | params->rmask |= 1 << var; |
177 | } |
178 | return changed; |
179 | } |
180 | |
181 | static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, |
182 | struct snd_pcm_hw_params *params, |
183 | snd_pcm_hw_param_t var, |
184 | const struct snd_mask *val) |
185 | { |
186 | int changed = _snd_pcm_hw_param_mask(params, var, val); |
187 | if (changed < 0) |
188 | return changed; |
189 | if (params->rmask) { |
190 | int err = snd_pcm_hw_refine(substream: pcm, params); |
191 | if (err < 0) |
192 | return err; |
193 | } |
194 | return 0; |
195 | } |
196 | |
197 | static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, |
198 | snd_pcm_hw_param_t var, unsigned int val, |
199 | int dir) |
200 | { |
201 | int changed; |
202 | int open = 0; |
203 | if (dir) { |
204 | if (dir > 0) { |
205 | open = 1; |
206 | } else if (dir < 0) { |
207 | if (val > 0) { |
208 | open = 1; |
209 | val--; |
210 | } |
211 | } |
212 | } |
213 | if (hw_is_mask(var)) |
214 | changed = snd_mask_refine_min(mask: hw_param_mask(params, var), |
215 | val: val + !!open); |
216 | else if (hw_is_interval(var)) |
217 | changed = snd_interval_refine_min(i: hw_param_interval(params, var), |
218 | min: val, openmin: open); |
219 | else |
220 | return -EINVAL; |
221 | if (changed > 0) { |
222 | params->cmask |= 1 << var; |
223 | params->rmask |= 1 << var; |
224 | } |
225 | return changed; |
226 | } |
227 | |
228 | /** |
229 | * snd_pcm_hw_param_min |
230 | * @pcm: PCM instance |
231 | * @params: the hw_params instance |
232 | * @var: parameter to retrieve |
233 | * @val: minimal value |
234 | * @dir: pointer to the direction (-1,0,1) or NULL |
235 | * |
236 | * Inside configuration space defined by PARAMS remove from PAR all |
237 | * values < VAL. Reduce configuration space accordingly. |
238 | * Return new minimum or -EINVAL if the configuration space is empty |
239 | */ |
240 | static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, |
241 | struct snd_pcm_hw_params *params, |
242 | snd_pcm_hw_param_t var, unsigned int val, |
243 | int *dir) |
244 | { |
245 | int changed = _snd_pcm_hw_param_min(params, var, val, dir: dir ? *dir : 0); |
246 | if (changed < 0) |
247 | return changed; |
248 | if (params->rmask) { |
249 | int err = snd_pcm_hw_refine(substream: pcm, params); |
250 | if (err < 0) |
251 | return err; |
252 | } |
253 | return snd_pcm_hw_param_value_min(params, var, dir); |
254 | } |
255 | |
256 | static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, |
257 | snd_pcm_hw_param_t var, unsigned int val, |
258 | int dir) |
259 | { |
260 | int changed; |
261 | int open = 0; |
262 | if (dir) { |
263 | if (dir < 0) { |
264 | open = 1; |
265 | } else if (dir > 0) { |
266 | open = 1; |
267 | val++; |
268 | } |
269 | } |
270 | if (hw_is_mask(var)) { |
271 | if (val == 0 && open) { |
272 | snd_mask_none(mask: hw_param_mask(params, var)); |
273 | changed = -EINVAL; |
274 | } else |
275 | changed = snd_mask_refine_max(mask: hw_param_mask(params, var), |
276 | val: val - !!open); |
277 | } else if (hw_is_interval(var)) |
278 | changed = snd_interval_refine_max(i: hw_param_interval(params, var), |
279 | max: val, openmax: open); |
280 | else |
281 | return -EINVAL; |
282 | if (changed > 0) { |
283 | params->cmask |= 1 << var; |
284 | params->rmask |= 1 << var; |
285 | } |
286 | return changed; |
287 | } |
288 | |
289 | /** |
290 | * snd_pcm_hw_param_max |
291 | * @pcm: PCM instance |
292 | * @params: the hw_params instance |
293 | * @var: parameter to retrieve |
294 | * @val: maximal value |
295 | * @dir: pointer to the direction (-1,0,1) or NULL |
296 | * |
297 | * Inside configuration space defined by PARAMS remove from PAR all |
298 | * values >= VAL + 1. Reduce configuration space accordingly. |
299 | * Return new maximum or -EINVAL if the configuration space is empty |
300 | */ |
301 | static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, |
302 | struct snd_pcm_hw_params *params, |
303 | snd_pcm_hw_param_t var, unsigned int val, |
304 | int *dir) |
305 | { |
306 | int changed = _snd_pcm_hw_param_max(params, var, val, dir: dir ? *dir : 0); |
307 | if (changed < 0) |
308 | return changed; |
309 | if (params->rmask) { |
310 | int err = snd_pcm_hw_refine(substream: pcm, params); |
311 | if (err < 0) |
312 | return err; |
313 | } |
314 | return snd_pcm_hw_param_value_max(params, var, dir); |
315 | } |
316 | |
317 | static int boundary_sub(int a, int adir, |
318 | int b, int bdir, |
319 | int *c, int *cdir) |
320 | { |
321 | adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); |
322 | bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); |
323 | *c = a - b; |
324 | *cdir = adir - bdir; |
325 | if (*cdir == -2) { |
326 | (*c)--; |
327 | } else if (*cdir == 2) { |
328 | (*c)++; |
329 | } |
330 | return 0; |
331 | } |
332 | |
333 | static int boundary_lt(unsigned int a, int adir, |
334 | unsigned int b, int bdir) |
335 | { |
336 | if (adir < 0) { |
337 | a--; |
338 | adir = 1; |
339 | } else if (adir > 0) |
340 | adir = 1; |
341 | if (bdir < 0) { |
342 | b--; |
343 | bdir = 1; |
344 | } else if (bdir > 0) |
345 | bdir = 1; |
346 | return a < b || (a == b && adir < bdir); |
347 | } |
348 | |
349 | /* Return 1 if min is nearer to best than max */ |
350 | static int boundary_nearer(int min, int mindir, |
351 | int best, int bestdir, |
352 | int max, int maxdir) |
353 | { |
354 | int dmin, dmindir; |
355 | int dmax, dmaxdir; |
356 | boundary_sub(a: best, adir: bestdir, b: min, bdir: mindir, c: &dmin, cdir: &dmindir); |
357 | boundary_sub(a: max, adir: maxdir, b: best, bdir: bestdir, c: &dmax, cdir: &dmaxdir); |
358 | return boundary_lt(a: dmin, adir: dmindir, b: dmax, bdir: dmaxdir); |
359 | } |
360 | |
361 | /** |
362 | * snd_pcm_hw_param_near |
363 | * @pcm: PCM instance |
364 | * @params: the hw_params instance |
365 | * @var: parameter to retrieve |
366 | * @best: value to set |
367 | * @dir: pointer to the direction (-1,0,1) or NULL |
368 | * |
369 | * Inside configuration space defined by PARAMS set PAR to the available value |
370 | * nearest to VAL. Reduce configuration space accordingly. |
371 | * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, |
372 | * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. |
373 | * Return the value found. |
374 | */ |
375 | static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, |
376 | struct snd_pcm_hw_params *params, |
377 | snd_pcm_hw_param_t var, unsigned int best, |
378 | int *dir) |
379 | { |
380 | struct snd_pcm_hw_params *save = NULL; |
381 | int v; |
382 | unsigned int saved_min; |
383 | int last = 0; |
384 | int min, max; |
385 | int mindir, maxdir; |
386 | int valdir = dir ? *dir : 0; |
387 | /* FIXME */ |
388 | if (best > INT_MAX) |
389 | best = INT_MAX; |
390 | min = max = best; |
391 | mindir = maxdir = valdir; |
392 | if (maxdir > 0) |
393 | maxdir = 0; |
394 | else if (maxdir == 0) |
395 | maxdir = -1; |
396 | else { |
397 | maxdir = 1; |
398 | max--; |
399 | } |
400 | save = kmalloc(size: sizeof(*save), GFP_KERNEL); |
401 | if (save == NULL) |
402 | return -ENOMEM; |
403 | *save = *params; |
404 | saved_min = min; |
405 | min = snd_pcm_hw_param_min(pcm, params, var, val: min, dir: &mindir); |
406 | if (min >= 0) { |
407 | struct snd_pcm_hw_params *params1; |
408 | if (max < 0) |
409 | goto _end; |
410 | if ((unsigned int)min == saved_min && mindir == valdir) |
411 | goto _end; |
412 | params1 = kmalloc(size: sizeof(*params1), GFP_KERNEL); |
413 | if (params1 == NULL) { |
414 | kfree(objp: save); |
415 | return -ENOMEM; |
416 | } |
417 | *params1 = *save; |
418 | max = snd_pcm_hw_param_max(pcm, params: params1, var, val: max, dir: &maxdir); |
419 | if (max < 0) { |
420 | kfree(objp: params1); |
421 | goto _end; |
422 | } |
423 | if (boundary_nearer(min: max, mindir: maxdir, best, bestdir: valdir, max: min, maxdir: mindir)) { |
424 | *params = *params1; |
425 | last = 1; |
426 | } |
427 | kfree(objp: params1); |
428 | } else { |
429 | *params = *save; |
430 | max = snd_pcm_hw_param_max(pcm, params, var, val: max, dir: &maxdir); |
431 | if (max < 0) { |
432 | kfree(objp: save); |
433 | return max; |
434 | } |
435 | last = 1; |
436 | } |
437 | _end: |
438 | kfree(objp: save); |
439 | if (last) |
440 | v = snd_pcm_hw_param_last(pcm, params, var, dir); |
441 | else |
442 | v = snd_pcm_hw_param_first(pcm, params, var, dir); |
443 | return v; |
444 | } |
445 | |
446 | static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, |
447 | snd_pcm_hw_param_t var, unsigned int val, |
448 | int dir) |
449 | { |
450 | int changed; |
451 | if (hw_is_mask(var)) { |
452 | struct snd_mask *m = hw_param_mask(params, var); |
453 | if (val == 0 && dir < 0) { |
454 | changed = -EINVAL; |
455 | snd_mask_none(mask: m); |
456 | } else { |
457 | if (dir > 0) |
458 | val++; |
459 | else if (dir < 0) |
460 | val--; |
461 | changed = snd_mask_refine_set(mask: hw_param_mask(params, var), val); |
462 | } |
463 | } else if (hw_is_interval(var)) { |
464 | struct snd_interval *i = hw_param_interval(params, var); |
465 | if (val == 0 && dir < 0) { |
466 | changed = -EINVAL; |
467 | snd_interval_none(i); |
468 | } else if (dir == 0) |
469 | changed = snd_interval_refine_set(i, val); |
470 | else { |
471 | struct snd_interval t; |
472 | t.openmin = 1; |
473 | t.openmax = 1; |
474 | t.empty = 0; |
475 | t.integer = 0; |
476 | if (dir < 0) { |
477 | t.min = val - 1; |
478 | t.max = val; |
479 | } else { |
480 | t.min = val; |
481 | t.max = val+1; |
482 | } |
483 | changed = snd_interval_refine(i, v: &t); |
484 | } |
485 | } else |
486 | return -EINVAL; |
487 | if (changed > 0) { |
488 | params->cmask |= 1 << var; |
489 | params->rmask |= 1 << var; |
490 | } |
491 | return changed; |
492 | } |
493 | |
494 | /** |
495 | * snd_pcm_hw_param_set |
496 | * @pcm: PCM instance |
497 | * @params: the hw_params instance |
498 | * @var: parameter to retrieve |
499 | * @val: value to set |
500 | * @dir: pointer to the direction (-1,0,1) or NULL |
501 | * |
502 | * Inside configuration space defined by PARAMS remove from PAR all |
503 | * values != VAL. Reduce configuration space accordingly. |
504 | * Return VAL or -EINVAL if the configuration space is empty |
505 | */ |
506 | static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, |
507 | struct snd_pcm_hw_params *params, |
508 | snd_pcm_hw_param_t var, unsigned int val, |
509 | int dir) |
510 | { |
511 | int changed = _snd_pcm_hw_param_set(params, var, val, dir); |
512 | if (changed < 0) |
513 | return changed; |
514 | if (params->rmask) { |
515 | int err = snd_pcm_hw_refine(substream: pcm, params); |
516 | if (err < 0) |
517 | return err; |
518 | } |
519 | return snd_pcm_hw_param_value(params, var, NULL); |
520 | } |
521 | |
522 | static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, |
523 | snd_pcm_hw_param_t var) |
524 | { |
525 | int changed; |
526 | changed = snd_interval_setinteger(i: hw_param_interval(params, var)); |
527 | if (changed > 0) { |
528 | params->cmask |= 1 << var; |
529 | params->rmask |= 1 << var; |
530 | } |
531 | return changed; |
532 | } |
533 | |
534 | /* |
535 | * plugin |
536 | */ |
537 | |
538 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
539 | static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) |
540 | { |
541 | struct snd_pcm_runtime *runtime = substream->runtime; |
542 | struct snd_pcm_plugin *plugin, *next; |
543 | |
544 | plugin = runtime->oss.plugin_first; |
545 | while (plugin) { |
546 | next = plugin->next; |
547 | snd_pcm_plugin_free(plugin); |
548 | plugin = next; |
549 | } |
550 | runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; |
551 | return 0; |
552 | } |
553 | |
554 | static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) |
555 | { |
556 | struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
557 | plugin->next = runtime->oss.plugin_first; |
558 | plugin->prev = NULL; |
559 | if (runtime->oss.plugin_first) { |
560 | runtime->oss.plugin_first->prev = plugin; |
561 | runtime->oss.plugin_first = plugin; |
562 | } else { |
563 | runtime->oss.plugin_last = |
564 | runtime->oss.plugin_first = plugin; |
565 | } |
566 | return 0; |
567 | } |
568 | |
569 | int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) |
570 | { |
571 | struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
572 | plugin->next = NULL; |
573 | plugin->prev = runtime->oss.plugin_last; |
574 | if (runtime->oss.plugin_last) { |
575 | runtime->oss.plugin_last->next = plugin; |
576 | runtime->oss.plugin_last = plugin; |
577 | } else { |
578 | runtime->oss.plugin_last = |
579 | runtime->oss.plugin_first = plugin; |
580 | } |
581 | return 0; |
582 | } |
583 | #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ |
584 | |
585 | static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) |
586 | { |
587 | struct snd_pcm_runtime *runtime = substream->runtime; |
588 | long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
589 | long bytes = frames_to_bytes(runtime, size: frames); |
590 | if (buffer_size == runtime->oss.buffer_bytes) |
591 | return bytes; |
592 | #if BITS_PER_LONG >= 64 |
593 | return runtime->oss.buffer_bytes * bytes / buffer_size; |
594 | #else |
595 | { |
596 | u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; |
597 | return div_u64(bsize, buffer_size); |
598 | } |
599 | #endif |
600 | } |
601 | |
602 | static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) |
603 | { |
604 | struct snd_pcm_runtime *runtime = substream->runtime; |
605 | long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
606 | if (buffer_size == runtime->oss.buffer_bytes) |
607 | return bytes_to_frames(runtime, size: bytes); |
608 | return bytes_to_frames(runtime, size: (buffer_size * bytes) / runtime->oss.buffer_bytes); |
609 | } |
610 | |
611 | static inline |
612 | snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) |
613 | { |
614 | return runtime->hw_ptr_interrupt; |
615 | } |
616 | |
617 | /* define extended formats in the recent OSS versions (if any) */ |
618 | /* linear formats */ |
619 | #define AFMT_S32_LE 0x00001000 |
620 | #define AFMT_S32_BE 0x00002000 |
621 | #define AFMT_S24_LE 0x00008000 |
622 | #define AFMT_S24_BE 0x00010000 |
623 | #define AFMT_S24_PACKED 0x00040000 |
624 | |
625 | /* other supported formats */ |
626 | #define AFMT_FLOAT 0x00004000 |
627 | #define AFMT_SPDIF_RAW 0x00020000 |
628 | |
629 | /* unsupported formats */ |
630 | #define AFMT_AC3 0x00000400 |
631 | #define AFMT_VORBIS 0x00000800 |
632 | |
633 | static snd_pcm_format_t snd_pcm_oss_format_from(int format) |
634 | { |
635 | switch (format) { |
636 | case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; |
637 | case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; |
638 | case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; |
639 | case AFMT_U8: return SNDRV_PCM_FORMAT_U8; |
640 | case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; |
641 | case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; |
642 | case AFMT_S8: return SNDRV_PCM_FORMAT_S8; |
643 | case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; |
644 | case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; |
645 | case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; |
646 | case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; |
647 | case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; |
648 | case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; |
649 | case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; |
650 | case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; |
651 | case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; |
652 | case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; |
653 | default: return SNDRV_PCM_FORMAT_U8; |
654 | } |
655 | } |
656 | |
657 | static int snd_pcm_oss_format_to(snd_pcm_format_t format) |
658 | { |
659 | switch (format) { |
660 | case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; |
661 | case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; |
662 | case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; |
663 | case SNDRV_PCM_FORMAT_U8: return AFMT_U8; |
664 | case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; |
665 | case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; |
666 | case SNDRV_PCM_FORMAT_S8: return AFMT_S8; |
667 | case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; |
668 | case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; |
669 | case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; |
670 | case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; |
671 | case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; |
672 | case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; |
673 | case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; |
674 | case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; |
675 | case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; |
676 | case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; |
677 | default: return -EINVAL; |
678 | } |
679 | } |
680 | |
681 | static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, |
682 | struct snd_pcm_hw_params *oss_params, |
683 | struct snd_pcm_hw_params *slave_params) |
684 | { |
685 | ssize_t s; |
686 | ssize_t oss_buffer_size; |
687 | ssize_t oss_period_size, oss_periods; |
688 | ssize_t min_period_size, max_period_size; |
689 | struct snd_pcm_runtime *runtime = substream->runtime; |
690 | size_t oss_frame_size; |
691 | |
692 | oss_frame_size = snd_pcm_format_physical_width(format: params_format(p: oss_params)) * |
693 | params_channels(p: oss_params) / 8; |
694 | |
695 | oss_buffer_size = snd_pcm_hw_param_value_max(params: slave_params, |
696 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
697 | NULL); |
698 | if (oss_buffer_size <= 0) |
699 | return -EINVAL; |
700 | oss_buffer_size = snd_pcm_plug_client_size(handle: substream, |
701 | drv_size: oss_buffer_size * oss_frame_size); |
702 | if (oss_buffer_size <= 0) |
703 | return -EINVAL; |
704 | oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); |
705 | if (atomic_read(v: &substream->mmap_count)) { |
706 | if (oss_buffer_size > runtime->oss.mmap_bytes) |
707 | oss_buffer_size = runtime->oss.mmap_bytes; |
708 | } |
709 | |
710 | if (substream->oss.setup.period_size > 16) |
711 | oss_period_size = substream->oss.setup.period_size; |
712 | else if (runtime->oss.fragshift) { |
713 | oss_period_size = 1 << runtime->oss.fragshift; |
714 | if (oss_period_size > oss_buffer_size / 2) |
715 | oss_period_size = oss_buffer_size / 2; |
716 | } else { |
717 | int sd; |
718 | size_t bytes_per_sec = params_rate(p: oss_params) * snd_pcm_format_physical_width(format: params_format(p: oss_params)) * params_channels(p: oss_params) / 8; |
719 | |
720 | oss_period_size = oss_buffer_size; |
721 | do { |
722 | oss_period_size /= 2; |
723 | } while (oss_period_size > bytes_per_sec); |
724 | if (runtime->oss.subdivision == 0) { |
725 | sd = 4; |
726 | if (oss_period_size / sd > 4096) |
727 | sd *= 2; |
728 | if (oss_period_size / sd < 4096) |
729 | sd = 1; |
730 | } else |
731 | sd = runtime->oss.subdivision; |
732 | oss_period_size /= sd; |
733 | if (oss_period_size < 16) |
734 | oss_period_size = 16; |
735 | } |
736 | |
737 | min_period_size = snd_pcm_plug_client_size(handle: substream, |
738 | drv_size: snd_pcm_hw_param_value_min(params: slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); |
739 | if (min_period_size > 0) { |
740 | min_period_size *= oss_frame_size; |
741 | min_period_size = roundup_pow_of_two(min_period_size); |
742 | if (oss_period_size < min_period_size) |
743 | oss_period_size = min_period_size; |
744 | } |
745 | |
746 | max_period_size = snd_pcm_plug_client_size(handle: substream, |
747 | drv_size: snd_pcm_hw_param_value_max(params: slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); |
748 | if (max_period_size > 0) { |
749 | max_period_size *= oss_frame_size; |
750 | max_period_size = rounddown_pow_of_two(max_period_size); |
751 | if (oss_period_size > max_period_size) |
752 | oss_period_size = max_period_size; |
753 | } |
754 | |
755 | oss_periods = oss_buffer_size / oss_period_size; |
756 | |
757 | if (substream->oss.setup.periods > 1) |
758 | oss_periods = substream->oss.setup.periods; |
759 | |
760 | s = snd_pcm_hw_param_value_max(params: slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); |
761 | if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags) |
762 | s = runtime->oss.maxfrags; |
763 | if (oss_periods > s) |
764 | oss_periods = s; |
765 | |
766 | s = snd_pcm_hw_param_value_min(params: slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); |
767 | if (s < 2) |
768 | s = 2; |
769 | if (oss_periods < s) |
770 | oss_periods = s; |
771 | |
772 | while (oss_period_size * oss_periods > oss_buffer_size) |
773 | oss_period_size /= 2; |
774 | |
775 | if (oss_period_size < 16) |
776 | return -EINVAL; |
777 | |
778 | /* don't allocate too large period; 1MB period must be enough */ |
779 | if (oss_period_size > 1024 * 1024) |
780 | return -ENOMEM; |
781 | |
782 | runtime->oss.period_bytes = oss_period_size; |
783 | runtime->oss.period_frames = 1; |
784 | runtime->oss.periods = oss_periods; |
785 | return 0; |
786 | } |
787 | |
788 | static int choose_rate(struct snd_pcm_substream *substream, |
789 | struct snd_pcm_hw_params *params, unsigned int best_rate) |
790 | { |
791 | const struct snd_interval *it; |
792 | struct snd_pcm_hw_params *save; |
793 | unsigned int rate, prev; |
794 | |
795 | save = kmalloc(size: sizeof(*save), GFP_KERNEL); |
796 | if (save == NULL) |
797 | return -ENOMEM; |
798 | *save = *params; |
799 | it = hw_param_interval_c(params: save, SNDRV_PCM_HW_PARAM_RATE); |
800 | |
801 | /* try multiples of the best rate */ |
802 | rate = best_rate; |
803 | for (;;) { |
804 | if (it->max < rate || (it->max == rate && it->openmax)) |
805 | break; |
806 | if (it->min < rate || (it->min == rate && !it->openmin)) { |
807 | int ret; |
808 | ret = snd_pcm_hw_param_set(pcm: substream, params, |
809 | SNDRV_PCM_HW_PARAM_RATE, |
810 | val: rate, dir: 0); |
811 | if (ret == (int)rate) { |
812 | kfree(objp: save); |
813 | return rate; |
814 | } |
815 | *params = *save; |
816 | } |
817 | prev = rate; |
818 | rate += best_rate; |
819 | if (rate <= prev) |
820 | break; |
821 | } |
822 | |
823 | /* not found, use the nearest rate */ |
824 | kfree(objp: save); |
825 | return snd_pcm_hw_param_near(pcm: substream, params, SNDRV_PCM_HW_PARAM_RATE, best: best_rate, NULL); |
826 | } |
827 | |
828 | /* parameter locking: returns immediately if tried during streaming */ |
829 | static int lock_params(struct snd_pcm_runtime *runtime) |
830 | { |
831 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
832 | return -ERESTARTSYS; |
833 | if (atomic_read(v: &runtime->oss.rw_ref)) { |
834 | mutex_unlock(lock: &runtime->oss.params_lock); |
835 | return -EBUSY; |
836 | } |
837 | return 0; |
838 | } |
839 | |
840 | static void unlock_params(struct snd_pcm_runtime *runtime) |
841 | { |
842 | mutex_unlock(lock: &runtime->oss.params_lock); |
843 | } |
844 | |
845 | static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream) |
846 | { |
847 | struct snd_pcm_runtime *runtime = substream->runtime; |
848 | |
849 | kvfree(addr: runtime->oss.buffer); |
850 | runtime->oss.buffer = NULL; |
851 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
852 | snd_pcm_oss_plugin_clear(substream); |
853 | #endif |
854 | } |
855 | |
856 | /* call with params_lock held */ |
857 | static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) |
858 | { |
859 | struct snd_pcm_runtime *runtime = substream->runtime; |
860 | struct snd_pcm_hw_params *params, *sparams; |
861 | struct snd_pcm_sw_params *sw_params; |
862 | ssize_t oss_buffer_size, oss_period_size; |
863 | size_t oss_frame_size; |
864 | int err; |
865 | int direct; |
866 | snd_pcm_format_t format, sformat; |
867 | int n; |
868 | const struct snd_mask *sformat_mask; |
869 | struct snd_mask mask; |
870 | |
871 | if (!runtime->oss.params) |
872 | return 0; |
873 | sw_params = kzalloc(size: sizeof(*sw_params), GFP_KERNEL); |
874 | params = kmalloc(size: sizeof(*params), GFP_KERNEL); |
875 | sparams = kmalloc(size: sizeof(*sparams), GFP_KERNEL); |
876 | if (!sw_params || !params || !sparams) { |
877 | err = -ENOMEM; |
878 | goto failure; |
879 | } |
880 | |
881 | if (atomic_read(v: &substream->mmap_count)) |
882 | direct = 1; |
883 | else |
884 | direct = substream->oss.setup.direct; |
885 | |
886 | _snd_pcm_hw_params_any(params: sparams); |
887 | _snd_pcm_hw_param_setinteger(params: sparams, SNDRV_PCM_HW_PARAM_PERIODS); |
888 | _snd_pcm_hw_param_min(params: sparams, SNDRV_PCM_HW_PARAM_PERIODS, val: 2, dir: 0); |
889 | snd_mask_none(mask: &mask); |
890 | if (atomic_read(v: &substream->mmap_count)) |
891 | snd_mask_set(mask: &mask, val: (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); |
892 | else { |
893 | snd_mask_set(mask: &mask, val: (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
894 | if (!direct) |
895 | snd_mask_set(mask: &mask, val: (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
896 | } |
897 | err = snd_pcm_hw_param_mask(pcm: substream, params: sparams, SNDRV_PCM_HW_PARAM_ACCESS, val: &mask); |
898 | if (err < 0) { |
899 | pcm_dbg(substream->pcm, "No usable accesses\n" ); |
900 | err = -EINVAL; |
901 | goto failure; |
902 | } |
903 | |
904 | err = choose_rate(substream, params: sparams, best_rate: runtime->oss.rate); |
905 | if (err < 0) |
906 | goto failure; |
907 | err = snd_pcm_hw_param_near(pcm: substream, params: sparams, |
908 | SNDRV_PCM_HW_PARAM_CHANNELS, |
909 | best: runtime->oss.channels, NULL); |
910 | if (err < 0) |
911 | goto failure; |
912 | |
913 | format = snd_pcm_oss_format_from(format: runtime->oss.format); |
914 | |
915 | sformat_mask = hw_param_mask_c(params: sparams, SNDRV_PCM_HW_PARAM_FORMAT); |
916 | if (direct) |
917 | sformat = format; |
918 | else |
919 | sformat = snd_pcm_plug_slave_format(format, format_mask: sformat_mask); |
920 | |
921 | if ((__force int)sformat < 0 || |
922 | !snd_mask_test_format(mask: sformat_mask, format: sformat)) { |
923 | pcm_for_each_format(sformat) { |
924 | if (snd_mask_test_format(mask: sformat_mask, format: sformat) && |
925 | snd_pcm_oss_format_to(format: sformat) >= 0) |
926 | goto format_found; |
927 | } |
928 | pcm_dbg(substream->pcm, "Cannot find a format!!!\n" ); |
929 | err = -EINVAL; |
930 | goto failure; |
931 | } |
932 | format_found: |
933 | err = _snd_pcm_hw_param_set(params: sparams, SNDRV_PCM_HW_PARAM_FORMAT, val: (__force int)sformat, dir: 0); |
934 | if (err < 0) |
935 | goto failure; |
936 | |
937 | if (direct) { |
938 | memcpy(params, sparams, sizeof(*params)); |
939 | } else { |
940 | _snd_pcm_hw_params_any(params); |
941 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, |
942 | val: (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, dir: 0); |
943 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, |
944 | val: (__force int)snd_pcm_oss_format_from(format: runtime->oss.format), dir: 0); |
945 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, |
946 | val: runtime->oss.channels, dir: 0); |
947 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, |
948 | val: runtime->oss.rate, dir: 0); |
949 | pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n" , |
950 | params_access(params), params_format(params), |
951 | params_channels(params), params_rate(params)); |
952 | } |
953 | pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n" , |
954 | params_access(sparams), params_format(sparams), |
955 | params_channels(sparams), params_rate(sparams)); |
956 | |
957 | oss_frame_size = snd_pcm_format_physical_width(format: params_format(p: params)) * |
958 | params_channels(p: params) / 8; |
959 | |
960 | err = snd_pcm_oss_period_size(substream, oss_params: params, slave_params: sparams); |
961 | if (err < 0) |
962 | goto failure; |
963 | |
964 | n = snd_pcm_plug_slave_size(handle: substream, clt_size: runtime->oss.period_bytes / oss_frame_size); |
965 | err = snd_pcm_hw_param_near(pcm: substream, params: sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, best: n, NULL); |
966 | if (err < 0) |
967 | goto failure; |
968 | |
969 | err = snd_pcm_hw_param_near(pcm: substream, params: sparams, SNDRV_PCM_HW_PARAM_PERIODS, |
970 | best: runtime->oss.periods, NULL); |
971 | if (err < 0) |
972 | goto failure; |
973 | |
974 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
975 | |
976 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, arg: sparams); |
977 | if (err < 0) { |
978 | pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n" , err); |
979 | goto failure; |
980 | } |
981 | |
982 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
983 | snd_pcm_oss_plugin_clear(substream); |
984 | if (!direct) { |
985 | /* add necessary plugins */ |
986 | err = snd_pcm_plug_format_plugins(substream, params, slave_params: sparams); |
987 | if (err < 0) { |
988 | pcm_dbg(substream->pcm, |
989 | "snd_pcm_plug_format_plugins failed: %i\n" , err); |
990 | goto failure; |
991 | } |
992 | if (runtime->oss.plugin_first) { |
993 | struct snd_pcm_plugin *plugin; |
994 | err = snd_pcm_plugin_build_io(handle: substream, params: sparams, r_plugin: &plugin); |
995 | if (err < 0) { |
996 | pcm_dbg(substream->pcm, |
997 | "snd_pcm_plugin_build_io failed: %i\n" , err); |
998 | goto failure; |
999 | } |
1000 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1001 | err = snd_pcm_plugin_append(plugin); |
1002 | } else { |
1003 | err = snd_pcm_plugin_insert(plugin); |
1004 | } |
1005 | if (err < 0) |
1006 | goto failure; |
1007 | } |
1008 | } |
1009 | #endif |
1010 | |
1011 | if (runtime->oss.trigger) { |
1012 | sw_params->start_threshold = 1; |
1013 | } else { |
1014 | sw_params->start_threshold = runtime->boundary; |
1015 | } |
1016 | if (atomic_read(v: &substream->mmap_count) || |
1017 | substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
1018 | sw_params->stop_threshold = runtime->boundary; |
1019 | else |
1020 | sw_params->stop_threshold = runtime->buffer_size; |
1021 | sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; |
1022 | sw_params->period_step = 1; |
1023 | sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? |
1024 | 1 : runtime->period_size; |
1025 | if (atomic_read(v: &substream->mmap_count) || |
1026 | substream->oss.setup.nosilence) { |
1027 | sw_params->silence_threshold = 0; |
1028 | sw_params->silence_size = 0; |
1029 | } else { |
1030 | snd_pcm_uframes_t frames; |
1031 | frames = runtime->period_size + 16; |
1032 | if (frames > runtime->buffer_size) |
1033 | frames = runtime->buffer_size; |
1034 | sw_params->silence_threshold = frames; |
1035 | sw_params->silence_size = frames; |
1036 | } |
1037 | |
1038 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, arg: sw_params); |
1039 | if (err < 0) { |
1040 | pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n" , err); |
1041 | goto failure; |
1042 | } |
1043 | |
1044 | runtime->oss.periods = params_periods(p: sparams); |
1045 | oss_period_size = snd_pcm_plug_client_size(handle: substream, drv_size: params_period_size(p: sparams)); |
1046 | if (oss_period_size < 0) { |
1047 | err = -EINVAL; |
1048 | goto failure; |
1049 | } |
1050 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1051 | if (runtime->oss.plugin_first) { |
1052 | err = snd_pcm_plug_alloc(plug: substream, frames: oss_period_size); |
1053 | if (err < 0) |
1054 | goto failure; |
1055 | } |
1056 | #endif |
1057 | oss_period_size = array_size(oss_period_size, oss_frame_size); |
1058 | oss_buffer_size = array_size(oss_period_size, runtime->oss.periods); |
1059 | if (oss_buffer_size <= 0) { |
1060 | err = -EINVAL; |
1061 | goto failure; |
1062 | } |
1063 | |
1064 | runtime->oss.period_bytes = oss_period_size; |
1065 | runtime->oss.buffer_bytes = oss_buffer_size; |
1066 | |
1067 | pdprintf("oss: period bytes = %i, buffer bytes = %i\n" , |
1068 | runtime->oss.period_bytes, |
1069 | runtime->oss.buffer_bytes); |
1070 | pdprintf("slave: period_size = %i, buffer_size = %i\n" , |
1071 | params_period_size(sparams), |
1072 | params_buffer_size(sparams)); |
1073 | |
1074 | runtime->oss.format = snd_pcm_oss_format_to(format: params_format(p: params)); |
1075 | runtime->oss.channels = params_channels(p: params); |
1076 | runtime->oss.rate = params_rate(p: params); |
1077 | |
1078 | kvfree(addr: runtime->oss.buffer); |
1079 | runtime->oss.buffer = kvzalloc(size: runtime->oss.period_bytes, GFP_KERNEL); |
1080 | if (!runtime->oss.buffer) { |
1081 | err = -ENOMEM; |
1082 | goto failure; |
1083 | } |
1084 | |
1085 | runtime->oss.params = 0; |
1086 | runtime->oss.prepare = 1; |
1087 | runtime->oss.buffer_used = 0; |
1088 | if (runtime->dma_area) |
1089 | snd_pcm_format_set_silence(format: runtime->format, buf: runtime->dma_area, frames: bytes_to_samples(runtime, size: runtime->dma_bytes)); |
1090 | |
1091 | runtime->oss.period_frames = snd_pcm_alsa_frames(substream, bytes: oss_period_size); |
1092 | |
1093 | err = 0; |
1094 | failure: |
1095 | if (err) |
1096 | snd_pcm_oss_release_buffers(substream); |
1097 | kfree(objp: sw_params); |
1098 | kfree(objp: params); |
1099 | kfree(objp: sparams); |
1100 | return err; |
1101 | } |
1102 | |
1103 | /* this one takes the lock by itself */ |
1104 | static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, |
1105 | bool trylock) |
1106 | { |
1107 | struct snd_pcm_runtime *runtime = substream->runtime; |
1108 | int err; |
1109 | |
1110 | if (trylock) { |
1111 | if (!(mutex_trylock(lock: &runtime->oss.params_lock))) |
1112 | return -EAGAIN; |
1113 | } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
1114 | return -ERESTARTSYS; |
1115 | |
1116 | err = snd_pcm_oss_change_params_locked(substream); |
1117 | mutex_unlock(lock: &runtime->oss.params_lock); |
1118 | return err; |
1119 | } |
1120 | |
1121 | static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) |
1122 | { |
1123 | int idx, err; |
1124 | struct snd_pcm_substream *asubstream = NULL, *substream; |
1125 | |
1126 | for (idx = 0; idx < 2; idx++) { |
1127 | substream = pcm_oss_file->streams[idx]; |
1128 | if (substream == NULL) |
1129 | continue; |
1130 | if (asubstream == NULL) |
1131 | asubstream = substream; |
1132 | if (substream->runtime->oss.params) { |
1133 | err = snd_pcm_oss_change_params(substream, trylock: false); |
1134 | if (err < 0) |
1135 | return err; |
1136 | } |
1137 | } |
1138 | if (!asubstream) |
1139 | return -EIO; |
1140 | if (r_substream) |
1141 | *r_substream = asubstream; |
1142 | return 0; |
1143 | } |
1144 | |
1145 | /* call with params_lock held */ |
1146 | /* NOTE: this always call PREPARE unconditionally no matter whether |
1147 | * runtime->oss.prepare is set or not |
1148 | */ |
1149 | static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) |
1150 | { |
1151 | int err; |
1152 | struct snd_pcm_runtime *runtime = substream->runtime; |
1153 | |
1154 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); |
1155 | if (err < 0) { |
1156 | pcm_dbg(substream->pcm, |
1157 | "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n" ); |
1158 | return err; |
1159 | } |
1160 | runtime->oss.prepare = 0; |
1161 | runtime->oss.prev_hw_ptr_period = 0; |
1162 | runtime->oss.period_ptr = 0; |
1163 | runtime->oss.buffer_used = 0; |
1164 | |
1165 | return 0; |
1166 | } |
1167 | |
1168 | static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) |
1169 | { |
1170 | struct snd_pcm_runtime *runtime; |
1171 | int err; |
1172 | |
1173 | runtime = substream->runtime; |
1174 | if (runtime->oss.params) { |
1175 | err = snd_pcm_oss_change_params(substream, trylock: false); |
1176 | if (err < 0) |
1177 | return err; |
1178 | } |
1179 | if (runtime->oss.prepare) { |
1180 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
1181 | return -ERESTARTSYS; |
1182 | err = snd_pcm_oss_prepare(substream); |
1183 | mutex_unlock(lock: &runtime->oss.params_lock); |
1184 | if (err < 0) |
1185 | return err; |
1186 | } |
1187 | return 0; |
1188 | } |
1189 | |
1190 | /* call with params_lock held */ |
1191 | static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) |
1192 | { |
1193 | struct snd_pcm_runtime *runtime; |
1194 | int err; |
1195 | |
1196 | runtime = substream->runtime; |
1197 | if (runtime->oss.params) { |
1198 | err = snd_pcm_oss_change_params_locked(substream); |
1199 | if (err < 0) |
1200 | return err; |
1201 | } |
1202 | if (runtime->oss.prepare) { |
1203 | err = snd_pcm_oss_prepare(substream); |
1204 | if (err < 0) |
1205 | return err; |
1206 | } |
1207 | return 0; |
1208 | } |
1209 | |
1210 | static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) |
1211 | { |
1212 | struct snd_pcm_runtime *runtime; |
1213 | snd_pcm_uframes_t frames; |
1214 | int err = 0; |
1215 | |
1216 | while (1) { |
1217 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, arg: delay); |
1218 | if (err < 0) |
1219 | break; |
1220 | runtime = substream->runtime; |
1221 | if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) |
1222 | break; |
1223 | /* in case of overrun, skip whole periods like OSS/Linux driver does */ |
1224 | /* until avail(delay) <= buffer_size */ |
1225 | frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; |
1226 | frames /= runtime->period_size; |
1227 | frames *= runtime->period_size; |
1228 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, arg: &frames); |
1229 | if (err < 0) |
1230 | break; |
1231 | } |
1232 | return err; |
1233 | } |
1234 | |
1235 | snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
1236 | { |
1237 | struct snd_pcm_runtime *runtime = substream->runtime; |
1238 | int ret; |
1239 | while (1) { |
1240 | if (runtime->state == SNDRV_PCM_STATE_XRUN || |
1241 | runtime->state == SNDRV_PCM_STATE_SUSPENDED) { |
1242 | #ifdef OSS_DEBUG |
1243 | pcm_dbg(substream->pcm, |
1244 | "pcm_oss: write: recovering from %s\n" , |
1245 | runtime->state == SNDRV_PCM_STATE_XRUN ? |
1246 | "XRUN" : "SUSPEND" ); |
1247 | #endif |
1248 | ret = snd_pcm_oss_prepare(substream); |
1249 | if (ret < 0) |
1250 | break; |
1251 | } |
1252 | mutex_unlock(lock: &runtime->oss.params_lock); |
1253 | ret = __snd_pcm_lib_xfer(substream, buf: (void *)ptr, interleaved: true, |
1254 | frames, in_kernel); |
1255 | mutex_lock(&runtime->oss.params_lock); |
1256 | if (ret != -EPIPE && ret != -ESTRPIPE) |
1257 | break; |
1258 | /* test, if we can't store new data, because the stream */ |
1259 | /* has not been started */ |
1260 | if (runtime->state == SNDRV_PCM_STATE_PREPARED) |
1261 | return -EAGAIN; |
1262 | } |
1263 | return ret; |
1264 | } |
1265 | |
1266 | snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
1267 | { |
1268 | struct snd_pcm_runtime *runtime = substream->runtime; |
1269 | snd_pcm_sframes_t delay; |
1270 | int ret; |
1271 | while (1) { |
1272 | if (runtime->state == SNDRV_PCM_STATE_XRUN || |
1273 | runtime->state == SNDRV_PCM_STATE_SUSPENDED) { |
1274 | #ifdef OSS_DEBUG |
1275 | pcm_dbg(substream->pcm, |
1276 | "pcm_oss: read: recovering from %s\n" , |
1277 | runtime->state == SNDRV_PCM_STATE_XRUN ? |
1278 | "XRUN" : "SUSPEND" ); |
1279 | #endif |
1280 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
1281 | if (ret < 0) |
1282 | break; |
1283 | } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { |
1284 | ret = snd_pcm_oss_prepare(substream); |
1285 | if (ret < 0) |
1286 | break; |
1287 | } |
1288 | ret = snd_pcm_oss_capture_position_fixup(substream, delay: &delay); |
1289 | if (ret < 0) |
1290 | break; |
1291 | mutex_unlock(lock: &runtime->oss.params_lock); |
1292 | ret = __snd_pcm_lib_xfer(substream, buf: (void *)ptr, interleaved: true, |
1293 | frames, in_kernel); |
1294 | mutex_lock(&runtime->oss.params_lock); |
1295 | if (ret == -EPIPE) { |
1296 | if (runtime->state == SNDRV_PCM_STATE_DRAINING) { |
1297 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
1298 | if (ret < 0) |
1299 | break; |
1300 | } |
1301 | continue; |
1302 | } |
1303 | if (ret != -ESTRPIPE) |
1304 | break; |
1305 | } |
1306 | return ret; |
1307 | } |
1308 | |
1309 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1310 | snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) |
1311 | { |
1312 | struct snd_pcm_runtime *runtime = substream->runtime; |
1313 | int ret; |
1314 | while (1) { |
1315 | if (runtime->state == SNDRV_PCM_STATE_XRUN || |
1316 | runtime->state == SNDRV_PCM_STATE_SUSPENDED) { |
1317 | #ifdef OSS_DEBUG |
1318 | pcm_dbg(substream->pcm, |
1319 | "pcm_oss: writev: recovering from %s\n" , |
1320 | runtime->state == SNDRV_PCM_STATE_XRUN ? |
1321 | "XRUN" : "SUSPEND" ); |
1322 | #endif |
1323 | ret = snd_pcm_oss_prepare(substream); |
1324 | if (ret < 0) |
1325 | break; |
1326 | } |
1327 | ret = snd_pcm_kernel_writev(substream, bufs, frames); |
1328 | if (ret != -EPIPE && ret != -ESTRPIPE) |
1329 | break; |
1330 | |
1331 | /* test, if we can't store new data, because the stream */ |
1332 | /* has not been started */ |
1333 | if (runtime->state == SNDRV_PCM_STATE_PREPARED) |
1334 | return -EAGAIN; |
1335 | } |
1336 | return ret; |
1337 | } |
1338 | |
1339 | snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) |
1340 | { |
1341 | struct snd_pcm_runtime *runtime = substream->runtime; |
1342 | int ret; |
1343 | while (1) { |
1344 | if (runtime->state == SNDRV_PCM_STATE_XRUN || |
1345 | runtime->state == SNDRV_PCM_STATE_SUSPENDED) { |
1346 | #ifdef OSS_DEBUG |
1347 | pcm_dbg(substream->pcm, |
1348 | "pcm_oss: readv: recovering from %s\n" , |
1349 | runtime->state == SNDRV_PCM_STATE_XRUN ? |
1350 | "XRUN" : "SUSPEND" ); |
1351 | #endif |
1352 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
1353 | if (ret < 0) |
1354 | break; |
1355 | } else if (runtime->state == SNDRV_PCM_STATE_SETUP) { |
1356 | ret = snd_pcm_oss_prepare(substream); |
1357 | if (ret < 0) |
1358 | break; |
1359 | } |
1360 | ret = snd_pcm_kernel_readv(substream, bufs, frames); |
1361 | if (ret != -EPIPE && ret != -ESTRPIPE) |
1362 | break; |
1363 | } |
1364 | return ret; |
1365 | } |
1366 | #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ |
1367 | |
1368 | static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) |
1369 | { |
1370 | struct snd_pcm_runtime *runtime = substream->runtime; |
1371 | snd_pcm_sframes_t frames, frames1; |
1372 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1373 | if (runtime->oss.plugin_first) { |
1374 | struct snd_pcm_plugin_channel *channels; |
1375 | size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; |
1376 | if (!in_kernel) { |
1377 | if (copy_from_user(to: runtime->oss.buffer, from: (const char __force __user *)buf, n: bytes)) |
1378 | return -EFAULT; |
1379 | buf = runtime->oss.buffer; |
1380 | } |
1381 | frames = bytes / oss_frame_bytes; |
1382 | frames1 = snd_pcm_plug_client_channels_buf(handle: substream, buf: (char *)buf, count: frames, channels: &channels); |
1383 | if (frames1 < 0) |
1384 | return frames1; |
1385 | frames1 = snd_pcm_plug_write_transfer(handle: substream, src_channels: channels, size: frames1); |
1386 | if (frames1 <= 0) |
1387 | return frames1; |
1388 | bytes = frames1 * oss_frame_bytes; |
1389 | } else |
1390 | #endif |
1391 | { |
1392 | frames = bytes_to_frames(runtime, size: bytes); |
1393 | frames1 = snd_pcm_oss_write3(substream, ptr: buf, frames, in_kernel); |
1394 | if (frames1 <= 0) |
1395 | return frames1; |
1396 | bytes = frames_to_bytes(runtime, size: frames1); |
1397 | } |
1398 | return bytes; |
1399 | } |
1400 | |
1401 | static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) |
1402 | { |
1403 | size_t xfer = 0; |
1404 | ssize_t tmp = 0; |
1405 | struct snd_pcm_runtime *runtime = substream->runtime; |
1406 | |
1407 | if (atomic_read(v: &substream->mmap_count)) |
1408 | return -ENXIO; |
1409 | |
1410 | atomic_inc(v: &runtime->oss.rw_ref); |
1411 | while (bytes > 0) { |
1412 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
1413 | tmp = -ERESTARTSYS; |
1414 | break; |
1415 | } |
1416 | tmp = snd_pcm_oss_make_ready_locked(substream); |
1417 | if (tmp < 0) |
1418 | goto err; |
1419 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
1420 | tmp = bytes; |
1421 | if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) |
1422 | tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; |
1423 | if (tmp > 0) { |
1424 | if (copy_from_user(to: runtime->oss.buffer + runtime->oss.buffer_used, from: buf, n: tmp)) { |
1425 | tmp = -EFAULT; |
1426 | goto err; |
1427 | } |
1428 | } |
1429 | runtime->oss.buffer_used += tmp; |
1430 | buf += tmp; |
1431 | bytes -= tmp; |
1432 | xfer += tmp; |
1433 | if (substream->oss.setup.partialfrag || |
1434 | runtime->oss.buffer_used == runtime->oss.period_bytes) { |
1435 | tmp = snd_pcm_oss_write2(substream, buf: runtime->oss.buffer + runtime->oss.period_ptr, |
1436 | bytes: runtime->oss.buffer_used - runtime->oss.period_ptr, in_kernel: 1); |
1437 | if (tmp <= 0) |
1438 | goto err; |
1439 | runtime->oss.bytes += tmp; |
1440 | runtime->oss.period_ptr += tmp; |
1441 | runtime->oss.period_ptr %= runtime->oss.period_bytes; |
1442 | if (runtime->oss.period_ptr == 0 || |
1443 | runtime->oss.period_ptr == runtime->oss.buffer_used) |
1444 | runtime->oss.buffer_used = 0; |
1445 | else if ((substream->f_flags & O_NONBLOCK) != 0) { |
1446 | tmp = -EAGAIN; |
1447 | goto err; |
1448 | } |
1449 | } |
1450 | } else { |
1451 | tmp = snd_pcm_oss_write2(substream, |
1452 | buf: (const char __force *)buf, |
1453 | bytes: runtime->oss.period_bytes, in_kernel: 0); |
1454 | if (tmp <= 0) |
1455 | goto err; |
1456 | runtime->oss.bytes += tmp; |
1457 | buf += tmp; |
1458 | bytes -= tmp; |
1459 | xfer += tmp; |
1460 | if ((substream->f_flags & O_NONBLOCK) != 0 && |
1461 | tmp != runtime->oss.period_bytes) |
1462 | tmp = -EAGAIN; |
1463 | } |
1464 | err: |
1465 | mutex_unlock(lock: &runtime->oss.params_lock); |
1466 | if (tmp < 0) |
1467 | break; |
1468 | if (signal_pending(current)) { |
1469 | tmp = -ERESTARTSYS; |
1470 | break; |
1471 | } |
1472 | tmp = 0; |
1473 | } |
1474 | atomic_dec(v: &runtime->oss.rw_ref); |
1475 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
1476 | } |
1477 | |
1478 | static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) |
1479 | { |
1480 | struct snd_pcm_runtime *runtime = substream->runtime; |
1481 | snd_pcm_sframes_t frames, frames1; |
1482 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1483 | char __user *final_dst = (char __force __user *)buf; |
1484 | if (runtime->oss.plugin_first) { |
1485 | struct snd_pcm_plugin_channel *channels; |
1486 | size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; |
1487 | if (!in_kernel) |
1488 | buf = runtime->oss.buffer; |
1489 | frames = bytes / oss_frame_bytes; |
1490 | frames1 = snd_pcm_plug_client_channels_buf(handle: substream, buf, count: frames, channels: &channels); |
1491 | if (frames1 < 0) |
1492 | return frames1; |
1493 | frames1 = snd_pcm_plug_read_transfer(handle: substream, dst_channels_final: channels, size: frames1); |
1494 | if (frames1 <= 0) |
1495 | return frames1; |
1496 | bytes = frames1 * oss_frame_bytes; |
1497 | if (!in_kernel && copy_to_user(to: final_dst, from: buf, n: bytes)) |
1498 | return -EFAULT; |
1499 | } else |
1500 | #endif |
1501 | { |
1502 | frames = bytes_to_frames(runtime, size: bytes); |
1503 | frames1 = snd_pcm_oss_read3(substream, ptr: buf, frames, in_kernel); |
1504 | if (frames1 <= 0) |
1505 | return frames1; |
1506 | bytes = frames_to_bytes(runtime, size: frames1); |
1507 | } |
1508 | return bytes; |
1509 | } |
1510 | |
1511 | static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) |
1512 | { |
1513 | size_t xfer = 0; |
1514 | ssize_t tmp = 0; |
1515 | struct snd_pcm_runtime *runtime = substream->runtime; |
1516 | |
1517 | if (atomic_read(v: &substream->mmap_count)) |
1518 | return -ENXIO; |
1519 | |
1520 | atomic_inc(v: &runtime->oss.rw_ref); |
1521 | while (bytes > 0) { |
1522 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
1523 | tmp = -ERESTARTSYS; |
1524 | break; |
1525 | } |
1526 | tmp = snd_pcm_oss_make_ready_locked(substream); |
1527 | if (tmp < 0) |
1528 | goto err; |
1529 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
1530 | if (runtime->oss.buffer_used == 0) { |
1531 | tmp = snd_pcm_oss_read2(substream, buf: runtime->oss.buffer, bytes: runtime->oss.period_bytes, in_kernel: 1); |
1532 | if (tmp <= 0) |
1533 | goto err; |
1534 | runtime->oss.bytes += tmp; |
1535 | runtime->oss.period_ptr = tmp; |
1536 | runtime->oss.buffer_used = tmp; |
1537 | } |
1538 | tmp = bytes; |
1539 | if ((size_t) tmp > runtime->oss.buffer_used) |
1540 | tmp = runtime->oss.buffer_used; |
1541 | if (copy_to_user(to: buf, from: runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), n: tmp)) { |
1542 | tmp = -EFAULT; |
1543 | goto err; |
1544 | } |
1545 | buf += tmp; |
1546 | bytes -= tmp; |
1547 | xfer += tmp; |
1548 | runtime->oss.buffer_used -= tmp; |
1549 | } else { |
1550 | tmp = snd_pcm_oss_read2(substream, buf: (char __force *)buf, |
1551 | bytes: runtime->oss.period_bytes, in_kernel: 0); |
1552 | if (tmp <= 0) |
1553 | goto err; |
1554 | runtime->oss.bytes += tmp; |
1555 | buf += tmp; |
1556 | bytes -= tmp; |
1557 | xfer += tmp; |
1558 | } |
1559 | err: |
1560 | mutex_unlock(lock: &runtime->oss.params_lock); |
1561 | if (tmp < 0) |
1562 | break; |
1563 | if (signal_pending(current)) { |
1564 | tmp = -ERESTARTSYS; |
1565 | break; |
1566 | } |
1567 | tmp = 0; |
1568 | } |
1569 | atomic_dec(v: &runtime->oss.rw_ref); |
1570 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
1571 | } |
1572 | |
1573 | static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) |
1574 | { |
1575 | struct snd_pcm_substream *substream; |
1576 | struct snd_pcm_runtime *runtime; |
1577 | int i; |
1578 | |
1579 | for (i = 0; i < 2; i++) { |
1580 | substream = pcm_oss_file->streams[i]; |
1581 | if (!substream) |
1582 | continue; |
1583 | runtime = substream->runtime; |
1584 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
1585 | mutex_lock(&runtime->oss.params_lock); |
1586 | runtime->oss.prepare = 1; |
1587 | runtime->oss.buffer_used = 0; |
1588 | runtime->oss.prev_hw_ptr_period = 0; |
1589 | runtime->oss.period_ptr = 0; |
1590 | mutex_unlock(lock: &runtime->oss.params_lock); |
1591 | } |
1592 | return 0; |
1593 | } |
1594 | |
1595 | static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) |
1596 | { |
1597 | struct snd_pcm_substream *substream; |
1598 | int err; |
1599 | |
1600 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
1601 | if (substream != NULL) { |
1602 | err = snd_pcm_oss_make_ready(substream); |
1603 | if (err < 0) |
1604 | return err; |
1605 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); |
1606 | } |
1607 | /* note: all errors from the start action are ignored */ |
1608 | /* OSS apps do not know, how to handle them */ |
1609 | return 0; |
1610 | } |
1611 | |
1612 | static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) |
1613 | { |
1614 | struct snd_pcm_runtime *runtime; |
1615 | ssize_t result = 0; |
1616 | snd_pcm_state_t state; |
1617 | long res; |
1618 | wait_queue_entry_t wait; |
1619 | |
1620 | runtime = substream->runtime; |
1621 | init_waitqueue_entry(wq_entry: &wait, current); |
1622 | add_wait_queue(wq_head: &runtime->sleep, wq_entry: &wait); |
1623 | #ifdef OSS_DEBUG |
1624 | pcm_dbg(substream->pcm, "sync1: size = %li\n" , size); |
1625 | #endif |
1626 | while (1) { |
1627 | result = snd_pcm_oss_write2(substream, buf: runtime->oss.buffer, bytes: size, in_kernel: 1); |
1628 | if (result > 0) { |
1629 | runtime->oss.buffer_used = 0; |
1630 | result = 0; |
1631 | break; |
1632 | } |
1633 | if (result != 0 && result != -EAGAIN) |
1634 | break; |
1635 | result = 0; |
1636 | set_current_state(TASK_INTERRUPTIBLE); |
1637 | snd_pcm_stream_lock_irq(substream); |
1638 | state = runtime->state; |
1639 | snd_pcm_stream_unlock_irq(substream); |
1640 | if (state != SNDRV_PCM_STATE_RUNNING) { |
1641 | set_current_state(TASK_RUNNING); |
1642 | break; |
1643 | } |
1644 | res = schedule_timeout(timeout: 10 * HZ); |
1645 | if (signal_pending(current)) { |
1646 | result = -ERESTARTSYS; |
1647 | break; |
1648 | } |
1649 | if (res == 0) { |
1650 | pcm_err(substream->pcm, |
1651 | "OSS sync error - DMA timeout\n" ); |
1652 | result = -EIO; |
1653 | break; |
1654 | } |
1655 | } |
1656 | remove_wait_queue(wq_head: &runtime->sleep, wq_entry: &wait); |
1657 | return result; |
1658 | } |
1659 | |
1660 | static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) |
1661 | { |
1662 | int err = 0; |
1663 | unsigned int saved_f_flags; |
1664 | struct snd_pcm_substream *substream; |
1665 | struct snd_pcm_runtime *runtime; |
1666 | snd_pcm_format_t format; |
1667 | unsigned long width; |
1668 | size_t size; |
1669 | |
1670 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
1671 | if (substream != NULL) { |
1672 | runtime = substream->runtime; |
1673 | if (atomic_read(v: &substream->mmap_count)) |
1674 | goto __direct; |
1675 | atomic_inc(v: &runtime->oss.rw_ref); |
1676 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
1677 | atomic_dec(v: &runtime->oss.rw_ref); |
1678 | return -ERESTARTSYS; |
1679 | } |
1680 | err = snd_pcm_oss_make_ready_locked(substream); |
1681 | if (err < 0) |
1682 | goto unlock; |
1683 | format = snd_pcm_oss_format_from(format: runtime->oss.format); |
1684 | width = snd_pcm_format_physical_width(format); |
1685 | if (runtime->oss.buffer_used > 0) { |
1686 | #ifdef OSS_DEBUG |
1687 | pcm_dbg(substream->pcm, "sync: buffer_used\n" ); |
1688 | #endif |
1689 | size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; |
1690 | snd_pcm_format_set_silence(format, |
1691 | buf: runtime->oss.buffer + runtime->oss.buffer_used, |
1692 | frames: size); |
1693 | err = snd_pcm_oss_sync1(substream, size: runtime->oss.period_bytes); |
1694 | if (err < 0) |
1695 | goto unlock; |
1696 | } else if (runtime->oss.period_ptr > 0) { |
1697 | #ifdef OSS_DEBUG |
1698 | pcm_dbg(substream->pcm, "sync: period_ptr\n" ); |
1699 | #endif |
1700 | size = runtime->oss.period_bytes - runtime->oss.period_ptr; |
1701 | snd_pcm_format_set_silence(format, |
1702 | buf: runtime->oss.buffer, |
1703 | frames: size * 8 / width); |
1704 | err = snd_pcm_oss_sync1(substream, size); |
1705 | if (err < 0) |
1706 | goto unlock; |
1707 | } |
1708 | /* |
1709 | * The ALSA's period might be a bit large than OSS one. |
1710 | * Fill the remain portion of ALSA period with zeros. |
1711 | */ |
1712 | size = runtime->control->appl_ptr % runtime->period_size; |
1713 | if (size > 0) { |
1714 | size = runtime->period_size - size; |
1715 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
1716 | snd_pcm_lib_write(substream, NULL, frames: size); |
1717 | else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
1718 | snd_pcm_lib_writev(substream, NULL, frames: size); |
1719 | } |
1720 | unlock: |
1721 | mutex_unlock(lock: &runtime->oss.params_lock); |
1722 | atomic_dec(v: &runtime->oss.rw_ref); |
1723 | if (err < 0) |
1724 | return err; |
1725 | /* |
1726 | * finish sync: drain the buffer |
1727 | */ |
1728 | __direct: |
1729 | saved_f_flags = substream->f_flags; |
1730 | substream->f_flags &= ~O_NONBLOCK; |
1731 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
1732 | substream->f_flags = saved_f_flags; |
1733 | if (err < 0) |
1734 | return err; |
1735 | mutex_lock(&runtime->oss.params_lock); |
1736 | runtime->oss.prepare = 1; |
1737 | mutex_unlock(lock: &runtime->oss.params_lock); |
1738 | } |
1739 | |
1740 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
1741 | if (substream != NULL) { |
1742 | err = snd_pcm_oss_make_ready(substream); |
1743 | if (err < 0) |
1744 | return err; |
1745 | runtime = substream->runtime; |
1746 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
1747 | if (err < 0) |
1748 | return err; |
1749 | mutex_lock(&runtime->oss.params_lock); |
1750 | runtime->oss.buffer_used = 0; |
1751 | runtime->oss.prepare = 1; |
1752 | mutex_unlock(lock: &runtime->oss.params_lock); |
1753 | } |
1754 | return 0; |
1755 | } |
1756 | |
1757 | static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) |
1758 | { |
1759 | int idx; |
1760 | |
1761 | for (idx = 1; idx >= 0; --idx) { |
1762 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1763 | struct snd_pcm_runtime *runtime; |
1764 | int err; |
1765 | |
1766 | if (substream == NULL) |
1767 | continue; |
1768 | runtime = substream->runtime; |
1769 | if (rate < 1000) |
1770 | rate = 1000; |
1771 | else if (rate > 192000) |
1772 | rate = 192000; |
1773 | err = lock_params(runtime); |
1774 | if (err < 0) |
1775 | return err; |
1776 | if (runtime->oss.rate != rate) { |
1777 | runtime->oss.params = 1; |
1778 | runtime->oss.rate = rate; |
1779 | } |
1780 | unlock_params(runtime); |
1781 | } |
1782 | return snd_pcm_oss_get_rate(pcm_oss_file); |
1783 | } |
1784 | |
1785 | static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) |
1786 | { |
1787 | struct snd_pcm_substream *substream; |
1788 | int err; |
1789 | |
1790 | err = snd_pcm_oss_get_active_substream(pcm_oss_file, r_substream: &substream); |
1791 | if (err < 0) |
1792 | return err; |
1793 | return substream->runtime->oss.rate; |
1794 | } |
1795 | |
1796 | static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) |
1797 | { |
1798 | int idx; |
1799 | if (channels < 1) |
1800 | channels = 1; |
1801 | if (channels > 128) |
1802 | return -EINVAL; |
1803 | for (idx = 1; idx >= 0; --idx) { |
1804 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1805 | struct snd_pcm_runtime *runtime; |
1806 | int err; |
1807 | |
1808 | if (substream == NULL) |
1809 | continue; |
1810 | runtime = substream->runtime; |
1811 | err = lock_params(runtime); |
1812 | if (err < 0) |
1813 | return err; |
1814 | if (runtime->oss.channels != channels) { |
1815 | runtime->oss.params = 1; |
1816 | runtime->oss.channels = channels; |
1817 | } |
1818 | unlock_params(runtime); |
1819 | } |
1820 | return snd_pcm_oss_get_channels(pcm_oss_file); |
1821 | } |
1822 | |
1823 | static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) |
1824 | { |
1825 | struct snd_pcm_substream *substream; |
1826 | int err; |
1827 | |
1828 | err = snd_pcm_oss_get_active_substream(pcm_oss_file, r_substream: &substream); |
1829 | if (err < 0) |
1830 | return err; |
1831 | return substream->runtime->oss.channels; |
1832 | } |
1833 | |
1834 | static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) |
1835 | { |
1836 | struct snd_pcm_substream *substream; |
1837 | int err; |
1838 | |
1839 | err = snd_pcm_oss_get_active_substream(pcm_oss_file, r_substream: &substream); |
1840 | if (err < 0) |
1841 | return err; |
1842 | return substream->runtime->oss.period_bytes; |
1843 | } |
1844 | |
1845 | static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) |
1846 | { |
1847 | struct snd_pcm_substream *substream; |
1848 | int err; |
1849 | int direct; |
1850 | struct snd_pcm_hw_params *params; |
1851 | unsigned int formats = 0; |
1852 | const struct snd_mask *format_mask; |
1853 | int fmt; |
1854 | |
1855 | err = snd_pcm_oss_get_active_substream(pcm_oss_file, r_substream: &substream); |
1856 | if (err < 0) |
1857 | return err; |
1858 | if (atomic_read(v: &substream->mmap_count)) |
1859 | direct = 1; |
1860 | else |
1861 | direct = substream->oss.setup.direct; |
1862 | if (!direct) |
1863 | return AFMT_MU_LAW | AFMT_U8 | |
1864 | AFMT_S16_LE | AFMT_S16_BE | |
1865 | AFMT_S8 | AFMT_U16_LE | |
1866 | AFMT_U16_BE | |
1867 | AFMT_S32_LE | AFMT_S32_BE | |
1868 | AFMT_S24_LE | AFMT_S24_BE | |
1869 | AFMT_S24_PACKED; |
1870 | params = kmalloc(size: sizeof(*params), GFP_KERNEL); |
1871 | if (!params) |
1872 | return -ENOMEM; |
1873 | _snd_pcm_hw_params_any(params); |
1874 | err = snd_pcm_hw_refine(substream, params); |
1875 | if (err < 0) |
1876 | goto error; |
1877 | format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); |
1878 | for (fmt = 0; fmt < 32; ++fmt) { |
1879 | if (snd_mask_test(mask: format_mask, val: fmt)) { |
1880 | int f = snd_pcm_oss_format_to(format: (__force snd_pcm_format_t)fmt); |
1881 | if (f >= 0) |
1882 | formats |= f; |
1883 | } |
1884 | } |
1885 | |
1886 | error: |
1887 | kfree(objp: params); |
1888 | return err < 0 ? err : formats; |
1889 | } |
1890 | |
1891 | static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) |
1892 | { |
1893 | int formats, idx; |
1894 | int err; |
1895 | |
1896 | if (format != AFMT_QUERY) { |
1897 | formats = snd_pcm_oss_get_formats(pcm_oss_file); |
1898 | if (formats < 0) |
1899 | return formats; |
1900 | if (!(formats & format)) |
1901 | format = AFMT_U8; |
1902 | for (idx = 1; idx >= 0; --idx) { |
1903 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1904 | struct snd_pcm_runtime *runtime; |
1905 | if (substream == NULL) |
1906 | continue; |
1907 | runtime = substream->runtime; |
1908 | err = lock_params(runtime); |
1909 | if (err < 0) |
1910 | return err; |
1911 | if (runtime->oss.format != format) { |
1912 | runtime->oss.params = 1; |
1913 | runtime->oss.format = format; |
1914 | } |
1915 | unlock_params(runtime); |
1916 | } |
1917 | } |
1918 | return snd_pcm_oss_get_format(pcm_oss_file); |
1919 | } |
1920 | |
1921 | static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) |
1922 | { |
1923 | struct snd_pcm_substream *substream; |
1924 | int err; |
1925 | |
1926 | err = snd_pcm_oss_get_active_substream(pcm_oss_file, r_substream: &substream); |
1927 | if (err < 0) |
1928 | return err; |
1929 | return substream->runtime->oss.format; |
1930 | } |
1931 | |
1932 | static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) |
1933 | { |
1934 | struct snd_pcm_runtime *runtime; |
1935 | |
1936 | runtime = substream->runtime; |
1937 | if (subdivide == 0) { |
1938 | subdivide = runtime->oss.subdivision; |
1939 | if (subdivide == 0) |
1940 | subdivide = 1; |
1941 | return subdivide; |
1942 | } |
1943 | if (runtime->oss.subdivision || runtime->oss.fragshift) |
1944 | return -EINVAL; |
1945 | if (subdivide != 1 && subdivide != 2 && subdivide != 4 && |
1946 | subdivide != 8 && subdivide != 16) |
1947 | return -EINVAL; |
1948 | runtime->oss.subdivision = subdivide; |
1949 | runtime->oss.params = 1; |
1950 | return subdivide; |
1951 | } |
1952 | |
1953 | static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) |
1954 | { |
1955 | int err = -EINVAL, idx; |
1956 | |
1957 | for (idx = 1; idx >= 0; --idx) { |
1958 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1959 | struct snd_pcm_runtime *runtime; |
1960 | |
1961 | if (substream == NULL) |
1962 | continue; |
1963 | runtime = substream->runtime; |
1964 | err = lock_params(runtime); |
1965 | if (err < 0) |
1966 | return err; |
1967 | err = snd_pcm_oss_set_subdivide1(substream, subdivide); |
1968 | unlock_params(runtime); |
1969 | if (err < 0) |
1970 | return err; |
1971 | } |
1972 | return err; |
1973 | } |
1974 | |
1975 | static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) |
1976 | { |
1977 | struct snd_pcm_runtime *runtime; |
1978 | int fragshift; |
1979 | |
1980 | runtime = substream->runtime; |
1981 | if (runtime->oss.subdivision || runtime->oss.fragshift) |
1982 | return -EINVAL; |
1983 | fragshift = val & 0xffff; |
1984 | if (fragshift >= 25) /* should be large enough */ |
1985 | return -EINVAL; |
1986 | runtime->oss.fragshift = fragshift; |
1987 | runtime->oss.maxfrags = (val >> 16) & 0xffff; |
1988 | if (runtime->oss.fragshift < 4) /* < 16 */ |
1989 | runtime->oss.fragshift = 4; |
1990 | if (runtime->oss.maxfrags < 2) |
1991 | runtime->oss.maxfrags = 2; |
1992 | runtime->oss.params = 1; |
1993 | return 0; |
1994 | } |
1995 | |
1996 | static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) |
1997 | { |
1998 | int err = -EINVAL, idx; |
1999 | |
2000 | for (idx = 1; idx >= 0; --idx) { |
2001 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
2002 | struct snd_pcm_runtime *runtime; |
2003 | |
2004 | if (substream == NULL) |
2005 | continue; |
2006 | runtime = substream->runtime; |
2007 | err = lock_params(runtime); |
2008 | if (err < 0) |
2009 | return err; |
2010 | err = snd_pcm_oss_set_fragment1(substream, val); |
2011 | unlock_params(runtime); |
2012 | if (err < 0) |
2013 | return err; |
2014 | } |
2015 | return err; |
2016 | } |
2017 | |
2018 | static int snd_pcm_oss_nonblock(struct file * file) |
2019 | { |
2020 | spin_lock(lock: &file->f_lock); |
2021 | file->f_flags |= O_NONBLOCK; |
2022 | spin_unlock(lock: &file->f_lock); |
2023 | return 0; |
2024 | } |
2025 | |
2026 | static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) |
2027 | { |
2028 | |
2029 | if (substream == NULL) { |
2030 | res &= ~DSP_CAP_DUPLEX; |
2031 | return res; |
2032 | } |
2033 | #ifdef DSP_CAP_MULTI |
2034 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
2035 | if (substream->pstr->substream_count > 1) |
2036 | res |= DSP_CAP_MULTI; |
2037 | #endif |
2038 | /* DSP_CAP_REALTIME is set all times: */ |
2039 | /* all ALSA drivers can return actual pointer in ring buffer */ |
2040 | #if defined(DSP_CAP_REALTIME) && 0 |
2041 | { |
2042 | struct snd_pcm_runtime *runtime = substream->runtime; |
2043 | if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) |
2044 | res &= ~DSP_CAP_REALTIME; |
2045 | } |
2046 | #endif |
2047 | return res; |
2048 | } |
2049 | |
2050 | static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) |
2051 | { |
2052 | int result, idx; |
2053 | |
2054 | result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; |
2055 | for (idx = 0; idx < 2; idx++) { |
2056 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
2057 | result = snd_pcm_oss_get_caps1(substream, res: result); |
2058 | } |
2059 | result |= 0x0001; /* revision - same as SB AWE 64 */ |
2060 | return result; |
2061 | } |
2062 | |
2063 | static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, |
2064 | snd_pcm_uframes_t hw_ptr) |
2065 | { |
2066 | struct snd_pcm_runtime *runtime = substream->runtime; |
2067 | snd_pcm_uframes_t appl_ptr; |
2068 | appl_ptr = hw_ptr + runtime->buffer_size; |
2069 | appl_ptr %= runtime->boundary; |
2070 | runtime->control->appl_ptr = appl_ptr; |
2071 | } |
2072 | |
2073 | static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) |
2074 | { |
2075 | struct snd_pcm_runtime *runtime; |
2076 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
2077 | int err, cmd; |
2078 | |
2079 | #ifdef OSS_DEBUG |
2080 | pr_debug("pcm_oss: trigger = 0x%x\n" , trigger); |
2081 | #endif |
2082 | |
2083 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2084 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
2085 | |
2086 | if (psubstream) { |
2087 | err = snd_pcm_oss_make_ready(substream: psubstream); |
2088 | if (err < 0) |
2089 | return err; |
2090 | } |
2091 | if (csubstream) { |
2092 | err = snd_pcm_oss_make_ready(substream: csubstream); |
2093 | if (err < 0) |
2094 | return err; |
2095 | } |
2096 | if (psubstream) { |
2097 | runtime = psubstream->runtime; |
2098 | cmd = 0; |
2099 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
2100 | return -ERESTARTSYS; |
2101 | if (trigger & PCM_ENABLE_OUTPUT) { |
2102 | if (runtime->oss.trigger) |
2103 | goto _skip1; |
2104 | if (atomic_read(v: &psubstream->mmap_count)) |
2105 | snd_pcm_oss_simulate_fill(substream: psubstream, |
2106 | hw_ptr: get_hw_ptr_period(runtime)); |
2107 | runtime->oss.trigger = 1; |
2108 | runtime->start_threshold = 1; |
2109 | cmd = SNDRV_PCM_IOCTL_START; |
2110 | } else { |
2111 | if (!runtime->oss.trigger) |
2112 | goto _skip1; |
2113 | runtime->oss.trigger = 0; |
2114 | runtime->start_threshold = runtime->boundary; |
2115 | cmd = SNDRV_PCM_IOCTL_DROP; |
2116 | runtime->oss.prepare = 1; |
2117 | } |
2118 | _skip1: |
2119 | mutex_unlock(lock: &runtime->oss.params_lock); |
2120 | if (cmd) { |
2121 | err = snd_pcm_kernel_ioctl(substream: psubstream, cmd, NULL); |
2122 | if (err < 0) |
2123 | return err; |
2124 | } |
2125 | } |
2126 | if (csubstream) { |
2127 | runtime = csubstream->runtime; |
2128 | cmd = 0; |
2129 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
2130 | return -ERESTARTSYS; |
2131 | if (trigger & PCM_ENABLE_INPUT) { |
2132 | if (runtime->oss.trigger) |
2133 | goto _skip2; |
2134 | runtime->oss.trigger = 1; |
2135 | runtime->start_threshold = 1; |
2136 | cmd = SNDRV_PCM_IOCTL_START; |
2137 | } else { |
2138 | if (!runtime->oss.trigger) |
2139 | goto _skip2; |
2140 | runtime->oss.trigger = 0; |
2141 | runtime->start_threshold = runtime->boundary; |
2142 | cmd = SNDRV_PCM_IOCTL_DROP; |
2143 | runtime->oss.prepare = 1; |
2144 | } |
2145 | _skip2: |
2146 | mutex_unlock(lock: &runtime->oss.params_lock); |
2147 | if (cmd) { |
2148 | err = snd_pcm_kernel_ioctl(substream: csubstream, cmd, NULL); |
2149 | if (err < 0) |
2150 | return err; |
2151 | } |
2152 | } |
2153 | return 0; |
2154 | } |
2155 | |
2156 | static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) |
2157 | { |
2158 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
2159 | int result = 0; |
2160 | |
2161 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2162 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
2163 | if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) |
2164 | result |= PCM_ENABLE_OUTPUT; |
2165 | if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) |
2166 | result |= PCM_ENABLE_INPUT; |
2167 | return result; |
2168 | } |
2169 | |
2170 | static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) |
2171 | { |
2172 | struct snd_pcm_substream *substream; |
2173 | struct snd_pcm_runtime *runtime; |
2174 | snd_pcm_sframes_t delay; |
2175 | int err; |
2176 | |
2177 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2178 | if (substream == NULL) |
2179 | return -EINVAL; |
2180 | err = snd_pcm_oss_make_ready(substream); |
2181 | if (err < 0) |
2182 | return err; |
2183 | runtime = substream->runtime; |
2184 | if (runtime->oss.params || runtime->oss.prepare) |
2185 | return 0; |
2186 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, arg: &delay); |
2187 | if (err == -EPIPE) |
2188 | delay = 0; /* hack for broken OSS applications */ |
2189 | else if (err < 0) |
2190 | return err; |
2191 | return snd_pcm_oss_bytes(substream, frames: delay); |
2192 | } |
2193 | |
2194 | static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) |
2195 | { |
2196 | struct snd_pcm_substream *substream; |
2197 | struct snd_pcm_runtime *runtime; |
2198 | snd_pcm_sframes_t delay; |
2199 | int fixup; |
2200 | struct count_info info; |
2201 | int err; |
2202 | |
2203 | if (_info == NULL) |
2204 | return -EFAULT; |
2205 | substream = pcm_oss_file->streams[stream]; |
2206 | if (substream == NULL) |
2207 | return -EINVAL; |
2208 | err = snd_pcm_oss_make_ready(substream); |
2209 | if (err < 0) |
2210 | return err; |
2211 | runtime = substream->runtime; |
2212 | if (runtime->oss.params || runtime->oss.prepare) { |
2213 | memset(&info, 0, sizeof(info)); |
2214 | if (copy_to_user(to: _info, from: &info, n: sizeof(info))) |
2215 | return -EFAULT; |
2216 | return 0; |
2217 | } |
2218 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
2219 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, arg: &delay); |
2220 | if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { |
2221 | err = 0; |
2222 | delay = 0; |
2223 | fixup = 0; |
2224 | } else { |
2225 | fixup = runtime->oss.buffer_used; |
2226 | } |
2227 | } else { |
2228 | err = snd_pcm_oss_capture_position_fixup(substream, delay: &delay); |
2229 | fixup = -runtime->oss.buffer_used; |
2230 | } |
2231 | if (err < 0) |
2232 | return err; |
2233 | info.ptr = snd_pcm_oss_bytes(substream, frames: runtime->status->hw_ptr % runtime->buffer_size); |
2234 | if (atomic_read(v: &substream->mmap_count)) { |
2235 | snd_pcm_sframes_t n; |
2236 | delay = get_hw_ptr_period(runtime); |
2237 | n = delay - runtime->oss.prev_hw_ptr_period; |
2238 | if (n < 0) |
2239 | n += runtime->boundary; |
2240 | info.blocks = n / runtime->period_size; |
2241 | runtime->oss.prev_hw_ptr_period = delay; |
2242 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
2243 | snd_pcm_oss_simulate_fill(substream, hw_ptr: delay); |
2244 | info.bytes = snd_pcm_oss_bytes(substream, frames: runtime->status->hw_ptr) & INT_MAX; |
2245 | } else { |
2246 | delay = snd_pcm_oss_bytes(substream, frames: delay); |
2247 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
2248 | if (substream->oss.setup.buggyptr) |
2249 | info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; |
2250 | else |
2251 | info.blocks = (delay + fixup) / runtime->oss.period_bytes; |
2252 | info.bytes = (runtime->oss.bytes - delay) & INT_MAX; |
2253 | } else { |
2254 | delay += fixup; |
2255 | info.blocks = delay / runtime->oss.period_bytes; |
2256 | info.bytes = (runtime->oss.bytes + delay) & INT_MAX; |
2257 | } |
2258 | } |
2259 | if (copy_to_user(to: _info, from: &info, n: sizeof(info))) |
2260 | return -EFAULT; |
2261 | return 0; |
2262 | } |
2263 | |
2264 | static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) |
2265 | { |
2266 | struct snd_pcm_substream *substream; |
2267 | struct snd_pcm_runtime *runtime; |
2268 | snd_pcm_sframes_t avail; |
2269 | int fixup; |
2270 | struct audio_buf_info info; |
2271 | int err; |
2272 | |
2273 | if (_info == NULL) |
2274 | return -EFAULT; |
2275 | substream = pcm_oss_file->streams[stream]; |
2276 | if (substream == NULL) |
2277 | return -EINVAL; |
2278 | runtime = substream->runtime; |
2279 | |
2280 | if (runtime->oss.params) { |
2281 | err = snd_pcm_oss_change_params(substream, trylock: false); |
2282 | if (err < 0) |
2283 | return err; |
2284 | } |
2285 | |
2286 | info.fragsize = runtime->oss.period_bytes; |
2287 | info.fragstotal = runtime->periods; |
2288 | if (runtime->oss.prepare) { |
2289 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
2290 | info.bytes = runtime->oss.period_bytes * runtime->oss.periods; |
2291 | info.fragments = runtime->oss.periods; |
2292 | } else { |
2293 | info.bytes = 0; |
2294 | info.fragments = 0; |
2295 | } |
2296 | } else { |
2297 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
2298 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, arg: &avail); |
2299 | if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { |
2300 | avail = runtime->buffer_size; |
2301 | err = 0; |
2302 | fixup = 0; |
2303 | } else { |
2304 | avail = runtime->buffer_size - avail; |
2305 | fixup = -runtime->oss.buffer_used; |
2306 | } |
2307 | } else { |
2308 | err = snd_pcm_oss_capture_position_fixup(substream, delay: &avail); |
2309 | fixup = runtime->oss.buffer_used; |
2310 | } |
2311 | if (err < 0) |
2312 | return err; |
2313 | info.bytes = snd_pcm_oss_bytes(substream, frames: avail) + fixup; |
2314 | info.fragments = info.bytes / runtime->oss.period_bytes; |
2315 | } |
2316 | |
2317 | #ifdef OSS_DEBUG |
2318 | pcm_dbg(substream->pcm, |
2319 | "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n" , |
2320 | info.bytes, info.fragments, info.fragstotal, info.fragsize); |
2321 | #endif |
2322 | if (copy_to_user(to: _info, from: &info, n: sizeof(info))) |
2323 | return -EFAULT; |
2324 | return 0; |
2325 | } |
2326 | |
2327 | static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) |
2328 | { |
2329 | // it won't be probably implemented |
2330 | // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); |
2331 | return -EINVAL; |
2332 | } |
2333 | |
2334 | static const char *strip_task_path(const char *path) |
2335 | { |
2336 | const char *ptr, *ptrl = NULL; |
2337 | for (ptr = path; *ptr; ptr++) { |
2338 | if (*ptr == '/') |
2339 | ptrl = ptr + 1; |
2340 | } |
2341 | return ptrl; |
2342 | } |
2343 | |
2344 | static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, |
2345 | const char *task_name, |
2346 | struct snd_pcm_oss_setup *rsetup) |
2347 | { |
2348 | struct snd_pcm_oss_setup *setup; |
2349 | |
2350 | mutex_lock(&pcm->streams[stream].oss.setup_mutex); |
2351 | do { |
2352 | for (setup = pcm->streams[stream].oss.setup_list; setup; |
2353 | setup = setup->next) { |
2354 | if (!strcmp(setup->task_name, task_name)) |
2355 | goto out; |
2356 | } |
2357 | } while ((task_name = strip_task_path(path: task_name)) != NULL); |
2358 | out: |
2359 | if (setup) |
2360 | *rsetup = *setup; |
2361 | mutex_unlock(lock: &pcm->streams[stream].oss.setup_mutex); |
2362 | } |
2363 | |
2364 | static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) |
2365 | { |
2366 | snd_pcm_oss_release_buffers(substream); |
2367 | substream->oss.oss = 0; |
2368 | } |
2369 | |
2370 | static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, |
2371 | struct snd_pcm_oss_setup *setup, |
2372 | int minor) |
2373 | { |
2374 | struct snd_pcm_runtime *runtime; |
2375 | |
2376 | substream->oss.oss = 1; |
2377 | substream->oss.setup = *setup; |
2378 | if (setup->nonblock) |
2379 | substream->f_flags |= O_NONBLOCK; |
2380 | else if (setup->block) |
2381 | substream->f_flags &= ~O_NONBLOCK; |
2382 | runtime = substream->runtime; |
2383 | runtime->oss.params = 1; |
2384 | runtime->oss.trigger = 1; |
2385 | runtime->oss.rate = 8000; |
2386 | mutex_init(&runtime->oss.params_lock); |
2387 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { |
2388 | case SNDRV_MINOR_OSS_PCM_8: |
2389 | runtime->oss.format = AFMT_U8; |
2390 | break; |
2391 | case SNDRV_MINOR_OSS_PCM_16: |
2392 | runtime->oss.format = AFMT_S16_LE; |
2393 | break; |
2394 | default: |
2395 | runtime->oss.format = AFMT_MU_LAW; |
2396 | } |
2397 | runtime->oss.channels = 1; |
2398 | runtime->oss.fragshift = 0; |
2399 | runtime->oss.maxfrags = 0; |
2400 | runtime->oss.subdivision = 0; |
2401 | substream->pcm_release = snd_pcm_oss_release_substream; |
2402 | atomic_set(v: &runtime->oss.rw_ref, i: 0); |
2403 | } |
2404 | |
2405 | static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) |
2406 | { |
2407 | int cidx; |
2408 | if (!pcm_oss_file) |
2409 | return 0; |
2410 | for (cidx = 0; cidx < 2; ++cidx) { |
2411 | struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; |
2412 | if (substream) |
2413 | snd_pcm_release_substream(substream); |
2414 | } |
2415 | kfree(objp: pcm_oss_file); |
2416 | return 0; |
2417 | } |
2418 | |
2419 | static int snd_pcm_oss_open_file(struct file *file, |
2420 | struct snd_pcm *pcm, |
2421 | struct snd_pcm_oss_file **rpcm_oss_file, |
2422 | int minor, |
2423 | struct snd_pcm_oss_setup *setup) |
2424 | { |
2425 | int idx, err; |
2426 | struct snd_pcm_oss_file *pcm_oss_file; |
2427 | struct snd_pcm_substream *substream; |
2428 | fmode_t f_mode = file->f_mode; |
2429 | |
2430 | if (rpcm_oss_file) |
2431 | *rpcm_oss_file = NULL; |
2432 | |
2433 | pcm_oss_file = kzalloc(size: sizeof(*pcm_oss_file), GFP_KERNEL); |
2434 | if (pcm_oss_file == NULL) |
2435 | return -ENOMEM; |
2436 | |
2437 | if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && |
2438 | (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) |
2439 | f_mode = FMODE_WRITE; |
2440 | |
2441 | file->f_flags &= ~O_APPEND; |
2442 | for (idx = 0; idx < 2; idx++) { |
2443 | if (setup[idx].disable) |
2444 | continue; |
2445 | if (! pcm->streams[idx].substream_count) |
2446 | continue; /* no matching substream */ |
2447 | if (idx == SNDRV_PCM_STREAM_PLAYBACK) { |
2448 | if (! (f_mode & FMODE_WRITE)) |
2449 | continue; |
2450 | } else { |
2451 | if (! (f_mode & FMODE_READ)) |
2452 | continue; |
2453 | } |
2454 | err = snd_pcm_open_substream(pcm, stream: idx, file, rsubstream: &substream); |
2455 | if (err < 0) { |
2456 | snd_pcm_oss_release_file(pcm_oss_file); |
2457 | return err; |
2458 | } |
2459 | |
2460 | pcm_oss_file->streams[idx] = substream; |
2461 | snd_pcm_oss_init_substream(substream, setup: &setup[idx], minor); |
2462 | } |
2463 | |
2464 | if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { |
2465 | snd_pcm_oss_release_file(pcm_oss_file); |
2466 | return -EINVAL; |
2467 | } |
2468 | |
2469 | file->private_data = pcm_oss_file; |
2470 | if (rpcm_oss_file) |
2471 | *rpcm_oss_file = pcm_oss_file; |
2472 | return 0; |
2473 | } |
2474 | |
2475 | |
2476 | static int snd_task_name(struct task_struct *task, char *name, size_t size) |
2477 | { |
2478 | unsigned int idx; |
2479 | |
2480 | if (snd_BUG_ON(!task || !name || size < 2)) |
2481 | return -EINVAL; |
2482 | for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) |
2483 | name[idx] = task->comm[idx]; |
2484 | name[idx] = '\0'; |
2485 | return 0; |
2486 | } |
2487 | |
2488 | static int snd_pcm_oss_open(struct inode *inode, struct file *file) |
2489 | { |
2490 | int err; |
2491 | char task_name[32]; |
2492 | struct snd_pcm *pcm; |
2493 | struct snd_pcm_oss_file *pcm_oss_file; |
2494 | struct snd_pcm_oss_setup setup[2]; |
2495 | int nonblock; |
2496 | wait_queue_entry_t wait; |
2497 | |
2498 | err = nonseekable_open(inode, filp: file); |
2499 | if (err < 0) |
2500 | return err; |
2501 | |
2502 | pcm = snd_lookup_oss_minor_data(minor: iminor(inode), |
2503 | SNDRV_OSS_DEVICE_TYPE_PCM); |
2504 | if (pcm == NULL) { |
2505 | err = -ENODEV; |
2506 | goto __error1; |
2507 | } |
2508 | err = snd_card_file_add(card: pcm->card, file); |
2509 | if (err < 0) |
2510 | goto __error1; |
2511 | if (!try_module_get(module: pcm->card->module)) { |
2512 | err = -EFAULT; |
2513 | goto __error2; |
2514 | } |
2515 | if (snd_task_name(current, name: task_name, size: sizeof(task_name)) < 0) { |
2516 | err = -EFAULT; |
2517 | goto __error; |
2518 | } |
2519 | memset(setup, 0, sizeof(setup)); |
2520 | if (file->f_mode & FMODE_WRITE) |
2521 | snd_pcm_oss_look_for_setup(pcm, stream: SNDRV_PCM_STREAM_PLAYBACK, |
2522 | task_name, rsetup: &setup[0]); |
2523 | if (file->f_mode & FMODE_READ) |
2524 | snd_pcm_oss_look_for_setup(pcm, stream: SNDRV_PCM_STREAM_CAPTURE, |
2525 | task_name, rsetup: &setup[1]); |
2526 | |
2527 | nonblock = !!(file->f_flags & O_NONBLOCK); |
2528 | if (!nonblock) |
2529 | nonblock = nonblock_open; |
2530 | |
2531 | init_waitqueue_entry(wq_entry: &wait, current); |
2532 | add_wait_queue(wq_head: &pcm->open_wait, wq_entry: &wait); |
2533 | mutex_lock(&pcm->open_mutex); |
2534 | while (1) { |
2535 | err = snd_pcm_oss_open_file(file, pcm, rpcm_oss_file: &pcm_oss_file, |
2536 | minor: iminor(inode), setup); |
2537 | if (err >= 0) |
2538 | break; |
2539 | if (err == -EAGAIN) { |
2540 | if (nonblock) { |
2541 | err = -EBUSY; |
2542 | break; |
2543 | } |
2544 | } else |
2545 | break; |
2546 | set_current_state(TASK_INTERRUPTIBLE); |
2547 | mutex_unlock(lock: &pcm->open_mutex); |
2548 | schedule(); |
2549 | mutex_lock(&pcm->open_mutex); |
2550 | if (pcm->card->shutdown) { |
2551 | err = -ENODEV; |
2552 | break; |
2553 | } |
2554 | if (signal_pending(current)) { |
2555 | err = -ERESTARTSYS; |
2556 | break; |
2557 | } |
2558 | } |
2559 | remove_wait_queue(wq_head: &pcm->open_wait, wq_entry: &wait); |
2560 | mutex_unlock(lock: &pcm->open_mutex); |
2561 | if (err < 0) |
2562 | goto __error; |
2563 | snd_card_unref(card: pcm->card); |
2564 | return err; |
2565 | |
2566 | __error: |
2567 | module_put(module: pcm->card->module); |
2568 | __error2: |
2569 | snd_card_file_remove(card: pcm->card, file); |
2570 | __error1: |
2571 | if (pcm) |
2572 | snd_card_unref(card: pcm->card); |
2573 | return err; |
2574 | } |
2575 | |
2576 | static int snd_pcm_oss_release(struct inode *inode, struct file *file) |
2577 | { |
2578 | struct snd_pcm *pcm; |
2579 | struct snd_pcm_substream *substream; |
2580 | struct snd_pcm_oss_file *pcm_oss_file; |
2581 | |
2582 | pcm_oss_file = file->private_data; |
2583 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2584 | if (substream == NULL) |
2585 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
2586 | if (snd_BUG_ON(!substream)) |
2587 | return -ENXIO; |
2588 | pcm = substream->pcm; |
2589 | if (!pcm->card->shutdown) |
2590 | snd_pcm_oss_sync(pcm_oss_file); |
2591 | mutex_lock(&pcm->open_mutex); |
2592 | snd_pcm_oss_release_file(pcm_oss_file); |
2593 | mutex_unlock(lock: &pcm->open_mutex); |
2594 | wake_up(&pcm->open_wait); |
2595 | module_put(module: pcm->card->module); |
2596 | snd_card_file_remove(card: pcm->card, file); |
2597 | return 0; |
2598 | } |
2599 | |
2600 | static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
2601 | { |
2602 | struct snd_pcm_oss_file *pcm_oss_file; |
2603 | int __user *p = (int __user *)arg; |
2604 | int res; |
2605 | |
2606 | pcm_oss_file = file->private_data; |
2607 | if (cmd == OSS_GETVERSION) |
2608 | return put_user(SNDRV_OSS_VERSION, p); |
2609 | if (cmd == OSS_ALSAEMULVER) |
2610 | return put_user(1, p); |
2611 | #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) |
2612 | if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ |
2613 | struct snd_pcm_substream *substream; |
2614 | int idx; |
2615 | for (idx = 0; idx < 2; ++idx) { |
2616 | substream = pcm_oss_file->streams[idx]; |
2617 | if (substream != NULL) |
2618 | break; |
2619 | } |
2620 | if (snd_BUG_ON(idx >= 2)) |
2621 | return -ENXIO; |
2622 | return snd_mixer_oss_ioctl_card(card: substream->pcm->card, cmd, arg); |
2623 | } |
2624 | #endif |
2625 | if (((cmd >> 8) & 0xff) != 'P') |
2626 | return -EINVAL; |
2627 | #ifdef OSS_DEBUG |
2628 | pr_debug("pcm_oss: ioctl = 0x%x\n" , cmd); |
2629 | #endif |
2630 | switch (cmd) { |
2631 | case SNDCTL_DSP_RESET: |
2632 | return snd_pcm_oss_reset(pcm_oss_file); |
2633 | case SNDCTL_DSP_SYNC: |
2634 | return snd_pcm_oss_sync(pcm_oss_file); |
2635 | case SNDCTL_DSP_SPEED: |
2636 | if (get_user(res, p)) |
2637 | return -EFAULT; |
2638 | res = snd_pcm_oss_set_rate(pcm_oss_file, rate: res); |
2639 | if (res < 0) |
2640 | return res; |
2641 | return put_user(res, p); |
2642 | case SOUND_PCM_READ_RATE: |
2643 | res = snd_pcm_oss_get_rate(pcm_oss_file); |
2644 | if (res < 0) |
2645 | return res; |
2646 | return put_user(res, p); |
2647 | case SNDCTL_DSP_STEREO: |
2648 | if (get_user(res, p)) |
2649 | return -EFAULT; |
2650 | res = res > 0 ? 2 : 1; |
2651 | res = snd_pcm_oss_set_channels(pcm_oss_file, channels: res); |
2652 | if (res < 0) |
2653 | return res; |
2654 | return put_user(--res, p); |
2655 | case SNDCTL_DSP_GETBLKSIZE: |
2656 | res = snd_pcm_oss_get_block_size(pcm_oss_file); |
2657 | if (res < 0) |
2658 | return res; |
2659 | return put_user(res, p); |
2660 | case SNDCTL_DSP_SETFMT: |
2661 | if (get_user(res, p)) |
2662 | return -EFAULT; |
2663 | res = snd_pcm_oss_set_format(pcm_oss_file, format: res); |
2664 | if (res < 0) |
2665 | return res; |
2666 | return put_user(res, p); |
2667 | case SOUND_PCM_READ_BITS: |
2668 | res = snd_pcm_oss_get_format(pcm_oss_file); |
2669 | if (res < 0) |
2670 | return res; |
2671 | return put_user(res, p); |
2672 | case SNDCTL_DSP_CHANNELS: |
2673 | if (get_user(res, p)) |
2674 | return -EFAULT; |
2675 | res = snd_pcm_oss_set_channels(pcm_oss_file, channels: res); |
2676 | if (res < 0) |
2677 | return res; |
2678 | return put_user(res, p); |
2679 | case SOUND_PCM_READ_CHANNELS: |
2680 | res = snd_pcm_oss_get_channels(pcm_oss_file); |
2681 | if (res < 0) |
2682 | return res; |
2683 | return put_user(res, p); |
2684 | case SOUND_PCM_WRITE_FILTER: |
2685 | case SOUND_PCM_READ_FILTER: |
2686 | return -EIO; |
2687 | case SNDCTL_DSP_POST: |
2688 | return snd_pcm_oss_post(pcm_oss_file); |
2689 | case SNDCTL_DSP_SUBDIVIDE: |
2690 | if (get_user(res, p)) |
2691 | return -EFAULT; |
2692 | res = snd_pcm_oss_set_subdivide(pcm_oss_file, subdivide: res); |
2693 | if (res < 0) |
2694 | return res; |
2695 | return put_user(res, p); |
2696 | case SNDCTL_DSP_SETFRAGMENT: |
2697 | if (get_user(res, p)) |
2698 | return -EFAULT; |
2699 | return snd_pcm_oss_set_fragment(pcm_oss_file, val: res); |
2700 | case SNDCTL_DSP_GETFMTS: |
2701 | res = snd_pcm_oss_get_formats(pcm_oss_file); |
2702 | if (res < 0) |
2703 | return res; |
2704 | return put_user(res, p); |
2705 | case SNDCTL_DSP_GETOSPACE: |
2706 | case SNDCTL_DSP_GETISPACE: |
2707 | return snd_pcm_oss_get_space(pcm_oss_file, |
2708 | stream: cmd == SNDCTL_DSP_GETISPACE ? |
2709 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
2710 | info: (struct audio_buf_info __user *) arg); |
2711 | case SNDCTL_DSP_NONBLOCK: |
2712 | return snd_pcm_oss_nonblock(file); |
2713 | case SNDCTL_DSP_GETCAPS: |
2714 | res = snd_pcm_oss_get_caps(pcm_oss_file); |
2715 | if (res < 0) |
2716 | return res; |
2717 | return put_user(res, p); |
2718 | case SNDCTL_DSP_GETTRIGGER: |
2719 | res = snd_pcm_oss_get_trigger(pcm_oss_file); |
2720 | if (res < 0) |
2721 | return res; |
2722 | return put_user(res, p); |
2723 | case SNDCTL_DSP_SETTRIGGER: |
2724 | if (get_user(res, p)) |
2725 | return -EFAULT; |
2726 | return snd_pcm_oss_set_trigger(pcm_oss_file, trigger: res); |
2727 | case SNDCTL_DSP_GETIPTR: |
2728 | case SNDCTL_DSP_GETOPTR: |
2729 | return snd_pcm_oss_get_ptr(pcm_oss_file, |
2730 | stream: cmd == SNDCTL_DSP_GETIPTR ? |
2731 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
2732 | info: (struct count_info __user *) arg); |
2733 | case SNDCTL_DSP_MAPINBUF: |
2734 | case SNDCTL_DSP_MAPOUTBUF: |
2735 | return snd_pcm_oss_get_mapbuf(pcm_oss_file, |
2736 | stream: cmd == SNDCTL_DSP_MAPINBUF ? |
2737 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
2738 | info: (struct buffmem_desc __user *) arg); |
2739 | case SNDCTL_DSP_SETSYNCRO: |
2740 | /* stop DMA now.. */ |
2741 | return 0; |
2742 | case SNDCTL_DSP_SETDUPLEX: |
2743 | if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) |
2744 | return 0; |
2745 | return -EIO; |
2746 | case SNDCTL_DSP_GETODELAY: |
2747 | res = snd_pcm_oss_get_odelay(pcm_oss_file); |
2748 | if (res < 0) { |
2749 | /* it's for sure, some broken apps don't check for error codes */ |
2750 | put_user(0, p); |
2751 | return res; |
2752 | } |
2753 | return put_user(res, p); |
2754 | case SNDCTL_DSP_PROFILE: |
2755 | return 0; /* silently ignore */ |
2756 | default: |
2757 | pr_debug("pcm_oss: unknown command = 0x%x\n" , cmd); |
2758 | } |
2759 | return -EINVAL; |
2760 | } |
2761 | |
2762 | #ifdef CONFIG_COMPAT |
2763 | /* all compatible */ |
2764 | static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, |
2765 | unsigned long arg) |
2766 | { |
2767 | /* |
2768 | * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF, |
2769 | * which are not implemented for the native case either |
2770 | */ |
2771 | return snd_pcm_oss_ioctl(file, cmd, arg: (unsigned long)compat_ptr(uptr: arg)); |
2772 | } |
2773 | #else |
2774 | #define snd_pcm_oss_ioctl_compat NULL |
2775 | #endif |
2776 | |
2777 | static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) |
2778 | { |
2779 | struct snd_pcm_oss_file *pcm_oss_file; |
2780 | struct snd_pcm_substream *substream; |
2781 | |
2782 | pcm_oss_file = file->private_data; |
2783 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
2784 | if (substream == NULL) |
2785 | return -ENXIO; |
2786 | substream->f_flags = file->f_flags & O_NONBLOCK; |
2787 | #ifndef OSS_DEBUG |
2788 | return snd_pcm_oss_read1(substream, buf, bytes: count); |
2789 | #else |
2790 | { |
2791 | ssize_t res = snd_pcm_oss_read1(substream, buf, count); |
2792 | pcm_dbg(substream->pcm, |
2793 | "pcm_oss: read %li bytes (returned %li bytes)\n" , |
2794 | (long)count, (long)res); |
2795 | return res; |
2796 | } |
2797 | #endif |
2798 | } |
2799 | |
2800 | static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) |
2801 | { |
2802 | struct snd_pcm_oss_file *pcm_oss_file; |
2803 | struct snd_pcm_substream *substream; |
2804 | long result; |
2805 | |
2806 | pcm_oss_file = file->private_data; |
2807 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2808 | if (substream == NULL) |
2809 | return -ENXIO; |
2810 | substream->f_flags = file->f_flags & O_NONBLOCK; |
2811 | result = snd_pcm_oss_write1(substream, buf, bytes: count); |
2812 | #ifdef OSS_DEBUG |
2813 | pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n" , |
2814 | (long)count, (long)result); |
2815 | #endif |
2816 | return result; |
2817 | } |
2818 | |
2819 | static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) |
2820 | { |
2821 | struct snd_pcm_runtime *runtime = substream->runtime; |
2822 | if (atomic_read(v: &substream->mmap_count)) |
2823 | return runtime->oss.prev_hw_ptr_period != |
2824 | get_hw_ptr_period(runtime); |
2825 | else |
2826 | return snd_pcm_playback_avail(runtime) >= |
2827 | runtime->oss.period_frames; |
2828 | } |
2829 | |
2830 | static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) |
2831 | { |
2832 | struct snd_pcm_runtime *runtime = substream->runtime; |
2833 | if (atomic_read(v: &substream->mmap_count)) |
2834 | return runtime->oss.prev_hw_ptr_period != |
2835 | get_hw_ptr_period(runtime); |
2836 | else |
2837 | return snd_pcm_capture_avail(runtime) >= |
2838 | runtime->oss.period_frames; |
2839 | } |
2840 | |
2841 | static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) |
2842 | { |
2843 | struct snd_pcm_oss_file *pcm_oss_file; |
2844 | __poll_t mask; |
2845 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
2846 | |
2847 | pcm_oss_file = file->private_data; |
2848 | |
2849 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2850 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
2851 | |
2852 | mask = 0; |
2853 | if (psubstream != NULL) { |
2854 | struct snd_pcm_runtime *runtime = psubstream->runtime; |
2855 | poll_wait(filp: file, wait_address: &runtime->sleep, p: wait); |
2856 | snd_pcm_stream_lock_irq(substream: psubstream); |
2857 | if (runtime->state != SNDRV_PCM_STATE_DRAINING && |
2858 | (runtime->state != SNDRV_PCM_STATE_RUNNING || |
2859 | snd_pcm_oss_playback_ready(substream: psubstream))) |
2860 | mask |= EPOLLOUT | EPOLLWRNORM; |
2861 | snd_pcm_stream_unlock_irq(substream: psubstream); |
2862 | } |
2863 | if (csubstream != NULL) { |
2864 | struct snd_pcm_runtime *runtime = csubstream->runtime; |
2865 | snd_pcm_state_t ostate; |
2866 | poll_wait(filp: file, wait_address: &runtime->sleep, p: wait); |
2867 | snd_pcm_stream_lock_irq(substream: csubstream); |
2868 | ostate = runtime->state; |
2869 | if (ostate != SNDRV_PCM_STATE_RUNNING || |
2870 | snd_pcm_oss_capture_ready(substream: csubstream)) |
2871 | mask |= EPOLLIN | EPOLLRDNORM; |
2872 | snd_pcm_stream_unlock_irq(substream: csubstream); |
2873 | if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { |
2874 | struct snd_pcm_oss_file ofile; |
2875 | memset(&ofile, 0, sizeof(ofile)); |
2876 | ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
2877 | runtime->oss.trigger = 0; |
2878 | snd_pcm_oss_set_trigger(pcm_oss_file: &ofile, PCM_ENABLE_INPUT); |
2879 | } |
2880 | } |
2881 | |
2882 | return mask; |
2883 | } |
2884 | |
2885 | static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) |
2886 | { |
2887 | struct snd_pcm_oss_file *pcm_oss_file; |
2888 | struct snd_pcm_substream *substream = NULL; |
2889 | struct snd_pcm_runtime *runtime; |
2890 | int err; |
2891 | |
2892 | #ifdef OSS_DEBUG |
2893 | pr_debug("pcm_oss: mmap begin\n" ); |
2894 | #endif |
2895 | pcm_oss_file = file->private_data; |
2896 | switch ((area->vm_flags & (VM_READ | VM_WRITE))) { |
2897 | case VM_READ | VM_WRITE: |
2898 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2899 | if (substream) |
2900 | break; |
2901 | fallthrough; |
2902 | case VM_READ: |
2903 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
2904 | break; |
2905 | case VM_WRITE: |
2906 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
2907 | break; |
2908 | default: |
2909 | return -EINVAL; |
2910 | } |
2911 | /* set VM_READ access as well to fix memset() routines that do |
2912 | reads before writes (to improve performance) */ |
2913 | vm_flags_set(vma: area, VM_READ); |
2914 | if (substream == NULL) |
2915 | return -ENXIO; |
2916 | runtime = substream->runtime; |
2917 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) |
2918 | return -EIO; |
2919 | if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) |
2920 | runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; |
2921 | else |
2922 | return -EIO; |
2923 | |
2924 | if (runtime->oss.params) { |
2925 | /* use mutex_trylock() for params_lock for avoiding a deadlock |
2926 | * between mmap_lock and params_lock taken by |
2927 | * copy_from/to_user() in snd_pcm_oss_write/read() |
2928 | */ |
2929 | err = snd_pcm_oss_change_params(substream, trylock: true); |
2930 | if (err < 0) |
2931 | return err; |
2932 | } |
2933 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
2934 | if (runtime->oss.plugin_first != NULL) |
2935 | return -EIO; |
2936 | #endif |
2937 | |
2938 | if (area->vm_pgoff != 0) |
2939 | return -EINVAL; |
2940 | |
2941 | err = snd_pcm_mmap_data(substream, file, area); |
2942 | if (err < 0) |
2943 | return err; |
2944 | runtime->oss.mmap_bytes = area->vm_end - area->vm_start; |
2945 | runtime->silence_threshold = 0; |
2946 | runtime->silence_size = 0; |
2947 | #ifdef OSS_DEBUG |
2948 | pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n" , |
2949 | runtime->oss.mmap_bytes); |
2950 | #endif |
2951 | /* In mmap mode we never stop */ |
2952 | runtime->stop_threshold = runtime->boundary; |
2953 | |
2954 | return 0; |
2955 | } |
2956 | |
2957 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
2958 | /* |
2959 | * /proc interface |
2960 | */ |
2961 | |
2962 | static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, |
2963 | struct snd_info_buffer *buffer) |
2964 | { |
2965 | struct snd_pcm_str *pstr = entry->private_data; |
2966 | struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; |
2967 | mutex_lock(&pstr->oss.setup_mutex); |
2968 | while (setup) { |
2969 | snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n" , |
2970 | setup->task_name, |
2971 | setup->periods, |
2972 | setup->period_size, |
2973 | setup->disable ? " disable" : "" , |
2974 | setup->direct ? " direct" : "" , |
2975 | setup->block ? " block" : "" , |
2976 | setup->nonblock ? " non-block" : "" , |
2977 | setup->partialfrag ? " partial-frag" : "" , |
2978 | setup->nosilence ? " no-silence" : "" ); |
2979 | setup = setup->next; |
2980 | } |
2981 | mutex_unlock(lock: &pstr->oss.setup_mutex); |
2982 | } |
2983 | |
2984 | static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) |
2985 | { |
2986 | struct snd_pcm_oss_setup *setup, *setupn; |
2987 | |
2988 | for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; |
2989 | setup; setup = setupn) { |
2990 | setupn = setup->next; |
2991 | kfree(objp: setup->task_name); |
2992 | kfree(objp: setup); |
2993 | } |
2994 | pstr->oss.setup_list = NULL; |
2995 | } |
2996 | |
2997 | static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, |
2998 | struct snd_info_buffer *buffer) |
2999 | { |
3000 | struct snd_pcm_str *pstr = entry->private_data; |
3001 | char line[128], str[32], task_name[32]; |
3002 | const char *ptr; |
3003 | int idx1; |
3004 | struct snd_pcm_oss_setup *setup, *setup1, template; |
3005 | |
3006 | while (!snd_info_get_line(buffer, line, len: sizeof(line))) { |
3007 | mutex_lock(&pstr->oss.setup_mutex); |
3008 | memset(&template, 0, sizeof(template)); |
3009 | ptr = snd_info_get_str(dest: task_name, src: line, len: sizeof(task_name)); |
3010 | if (!strcmp(task_name, "clear" ) || !strcmp(task_name, "erase" )) { |
3011 | snd_pcm_oss_proc_free_setup_list(pstr); |
3012 | mutex_unlock(lock: &pstr->oss.setup_mutex); |
3013 | continue; |
3014 | } |
3015 | for (setup = pstr->oss.setup_list; setup; setup = setup->next) { |
3016 | if (!strcmp(setup->task_name, task_name)) { |
3017 | template = *setup; |
3018 | break; |
3019 | } |
3020 | } |
3021 | ptr = snd_info_get_str(dest: str, src: ptr, len: sizeof(str)); |
3022 | template.periods = simple_strtoul(str, NULL, 10); |
3023 | ptr = snd_info_get_str(dest: str, src: ptr, len: sizeof(str)); |
3024 | template.period_size = simple_strtoul(str, NULL, 10); |
3025 | for (idx1 = 31; idx1 >= 0; idx1--) |
3026 | if (template.period_size & (1 << idx1)) |
3027 | break; |
3028 | for (idx1--; idx1 >= 0; idx1--) |
3029 | template.period_size &= ~(1 << idx1); |
3030 | do { |
3031 | ptr = snd_info_get_str(dest: str, src: ptr, len: sizeof(str)); |
3032 | if (!strcmp(str, "disable" )) { |
3033 | template.disable = 1; |
3034 | } else if (!strcmp(str, "direct" )) { |
3035 | template.direct = 1; |
3036 | } else if (!strcmp(str, "block" )) { |
3037 | template.block = 1; |
3038 | } else if (!strcmp(str, "non-block" )) { |
3039 | template.nonblock = 1; |
3040 | } else if (!strcmp(str, "partial-frag" )) { |
3041 | template.partialfrag = 1; |
3042 | } else if (!strcmp(str, "no-silence" )) { |
3043 | template.nosilence = 1; |
3044 | } else if (!strcmp(str, "buggy-ptr" )) { |
3045 | template.buggyptr = 1; |
3046 | } |
3047 | } while (*str); |
3048 | if (setup == NULL) { |
3049 | setup = kmalloc(size: sizeof(*setup), GFP_KERNEL); |
3050 | if (! setup) { |
3051 | buffer->error = -ENOMEM; |
3052 | mutex_unlock(lock: &pstr->oss.setup_mutex); |
3053 | return; |
3054 | } |
3055 | if (pstr->oss.setup_list == NULL) |
3056 | pstr->oss.setup_list = setup; |
3057 | else { |
3058 | for (setup1 = pstr->oss.setup_list; |
3059 | setup1->next; setup1 = setup1->next); |
3060 | setup1->next = setup; |
3061 | } |
3062 | template.task_name = kstrdup(s: task_name, GFP_KERNEL); |
3063 | if (! template.task_name) { |
3064 | kfree(objp: setup); |
3065 | buffer->error = -ENOMEM; |
3066 | mutex_unlock(lock: &pstr->oss.setup_mutex); |
3067 | return; |
3068 | } |
3069 | } |
3070 | *setup = template; |
3071 | mutex_unlock(lock: &pstr->oss.setup_mutex); |
3072 | } |
3073 | } |
3074 | |
3075 | static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) |
3076 | { |
3077 | int stream; |
3078 | for (stream = 0; stream < 2; ++stream) { |
3079 | struct snd_info_entry *entry; |
3080 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
3081 | if (pstr->substream_count == 0) |
3082 | continue; |
3083 | entry = snd_info_create_card_entry(card: pcm->card, name: "oss" , parent: pstr->proc_root); |
3084 | if (entry) { |
3085 | entry->content = SNDRV_INFO_CONTENT_TEXT; |
3086 | entry->mode = S_IFREG | 0644; |
3087 | entry->c.text.read = snd_pcm_oss_proc_read; |
3088 | entry->c.text.write = snd_pcm_oss_proc_write; |
3089 | entry->private_data = pstr; |
3090 | if (snd_info_register(entry) < 0) { |
3091 | snd_info_free_entry(entry); |
3092 | entry = NULL; |
3093 | } |
3094 | } |
3095 | pstr->oss.proc_entry = entry; |
3096 | } |
3097 | } |
3098 | |
3099 | static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) |
3100 | { |
3101 | int stream; |
3102 | for (stream = 0; stream < 2; ++stream) { |
3103 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
3104 | snd_info_free_entry(entry: pstr->oss.proc_entry); |
3105 | pstr->oss.proc_entry = NULL; |
3106 | snd_pcm_oss_proc_free_setup_list(pstr); |
3107 | } |
3108 | } |
3109 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
3110 | static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm) |
3111 | { |
3112 | } |
3113 | static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm) |
3114 | { |
3115 | } |
3116 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
3117 | |
3118 | /* |
3119 | * ENTRY functions |
3120 | */ |
3121 | |
3122 | static const struct file_operations snd_pcm_oss_f_reg = |
3123 | { |
3124 | .owner = THIS_MODULE, |
3125 | .read = snd_pcm_oss_read, |
3126 | .write = snd_pcm_oss_write, |
3127 | .open = snd_pcm_oss_open, |
3128 | .release = snd_pcm_oss_release, |
3129 | .llseek = no_llseek, |
3130 | .poll = snd_pcm_oss_poll, |
3131 | .unlocked_ioctl = snd_pcm_oss_ioctl, |
3132 | .compat_ioctl = snd_pcm_oss_ioctl_compat, |
3133 | .mmap = snd_pcm_oss_mmap, |
3134 | }; |
3135 | |
3136 | static void register_oss_dsp(struct snd_pcm *pcm, int index) |
3137 | { |
3138 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
3139 | card: pcm->card, dev: index, f_ops: &snd_pcm_oss_f_reg, |
3140 | private_data: pcm) < 0) { |
3141 | pcm_err(pcm, "unable to register OSS PCM device %i:%i\n" , |
3142 | pcm->card->number, pcm->device); |
3143 | } |
3144 | } |
3145 | |
3146 | static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) |
3147 | { |
3148 | pcm->oss.reg = 0; |
3149 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
3150 | char name[128]; |
3151 | int duplex; |
3152 | register_oss_dsp(pcm, index: 0); |
3153 | duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && |
3154 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && |
3155 | !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); |
3156 | sprintf(buf: name, fmt: "%s%s" , pcm->name, duplex ? " (DUPLEX)" : "" ); |
3157 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO |
3158 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, |
3159 | num: pcm->card->number, |
3160 | string: name); |
3161 | #endif |
3162 | pcm->oss.reg++; |
3163 | pcm->oss.reg_mask |= 1; |
3164 | } |
3165 | if (adsp_map[pcm->card->number] == (int)pcm->device) { |
3166 | register_oss_dsp(pcm, index: 1); |
3167 | pcm->oss.reg++; |
3168 | pcm->oss.reg_mask |= 2; |
3169 | } |
3170 | |
3171 | if (pcm->oss.reg) |
3172 | snd_pcm_oss_proc_init(pcm); |
3173 | |
3174 | return 0; |
3175 | } |
3176 | |
3177 | static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) |
3178 | { |
3179 | if (pcm->oss.reg) { |
3180 | if (pcm->oss.reg_mask & 1) { |
3181 | pcm->oss.reg_mask &= ~1; |
3182 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
3183 | card: pcm->card, dev: 0); |
3184 | } |
3185 | if (pcm->oss.reg_mask & 2) { |
3186 | pcm->oss.reg_mask &= ~2; |
3187 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
3188 | card: pcm->card, dev: 1); |
3189 | } |
3190 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
3191 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO |
3192 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); |
3193 | #endif |
3194 | } |
3195 | pcm->oss.reg = 0; |
3196 | } |
3197 | return 0; |
3198 | } |
3199 | |
3200 | static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) |
3201 | { |
3202 | snd_pcm_oss_disconnect_minor(pcm); |
3203 | snd_pcm_oss_proc_done(pcm); |
3204 | return 0; |
3205 | } |
3206 | |
3207 | static struct snd_pcm_notify snd_pcm_oss_notify = |
3208 | { |
3209 | .n_register = snd_pcm_oss_register_minor, |
3210 | .n_disconnect = snd_pcm_oss_disconnect_minor, |
3211 | .n_unregister = snd_pcm_oss_unregister_minor, |
3212 | }; |
3213 | |
3214 | static int __init alsa_pcm_oss_init(void) |
3215 | { |
3216 | int i; |
3217 | int err; |
3218 | |
3219 | /* check device map table */ |
3220 | for (i = 0; i < SNDRV_CARDS; i++) { |
3221 | if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { |
3222 | pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n" , |
3223 | i, dsp_map[i]); |
3224 | dsp_map[i] = 0; |
3225 | } |
3226 | if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { |
3227 | pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n" , |
3228 | i, adsp_map[i]); |
3229 | adsp_map[i] = 1; |
3230 | } |
3231 | } |
3232 | err = snd_pcm_notify(notify: &snd_pcm_oss_notify, nfree: 0); |
3233 | if (err < 0) |
3234 | return err; |
3235 | return 0; |
3236 | } |
3237 | |
3238 | static void __exit alsa_pcm_oss_exit(void) |
3239 | { |
3240 | snd_pcm_notify(notify: &snd_pcm_oss_notify, nfree: 1); |
3241 | } |
3242 | |
3243 | module_init(alsa_pcm_oss_init) |
3244 | module_exit(alsa_pcm_oss_exit) |
3245 | |