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