Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer / OSS compatible | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 | 29 | #include <linux/init.h> |
1da177e4 LT |
30 | #include <linux/slab.h> |
31 | #include <linux/time.h> | |
32 | #include <linux/vmalloc.h> | |
65a77217 | 33 | #include <linux/module.h> |
3f7440a6 | 34 | #include <linux/math64.h> |
543537bd | 35 | #include <linux/string.h> |
83266b6b | 36 | #include <linux/compat.h> |
1da177e4 LT |
37 | #include <sound/core.h> |
38 | #include <sound/minors.h> | |
39 | #include <sound/pcm.h> | |
40 | #include <sound/pcm_params.h> | |
41 | #include "pcm_plugin.h" | |
42 | #include <sound/info.h> | |
43 | #include <linux/soundcard.h> | |
44 | #include <sound/initval.h> | |
fea952e5 | 45 | #include <sound/mixer_oss.h> |
1da177e4 LT |
46 | |
47 | #define OSS_ALSAEMULVER _SIOR ('M', 249, int) | |
48 | ||
6581f4e7 | 49 | static int dsp_map[SNDRV_CARDS]; |
1da177e4 | 50 | static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
a67ff6a5 | 51 | static bool nonblock_open = 1; |
1da177e4 | 52 | |
c1017a4c | 53 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
54 | MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); |
55 | MODULE_LICENSE("GPL"); | |
56 | module_param_array(dsp_map, int, NULL, 0444); | |
57 | MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); | |
58 | module_param_array(adsp_map, int, NULL, 0444); | |
59 | MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); | |
60 | module_param(nonblock_open, bool, 0644); | |
61 | MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); | |
62 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); | |
63 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); | |
64 | ||
6ac77bc1 TI |
65 | static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); |
66 | static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); | |
67 | static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); | |
1da177e4 LT |
68 | |
69 | static inline mm_segment_t snd_enter_user(void) | |
70 | { | |
71 | mm_segment_t fs = get_fs(); | |
72 | set_fs(get_ds()); | |
73 | return fs; | |
74 | } | |
75 | ||
76 | static inline void snd_leave_user(mm_segment_t fs) | |
77 | { | |
78 | set_fs(fs); | |
79 | } | |
80 | ||
e88e8ae6 TI |
81 | /* |
82 | * helper functions to process hw_params | |
83 | */ | |
84 | static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) | |
85 | { | |
86 | int changed = 0; | |
87 | if (i->min < min) { | |
88 | i->min = min; | |
89 | i->openmin = openmin; | |
90 | changed = 1; | |
91 | } else if (i->min == min && !i->openmin && openmin) { | |
92 | i->openmin = 1; | |
93 | changed = 1; | |
94 | } | |
95 | if (i->integer) { | |
96 | if (i->openmin) { | |
97 | i->min++; | |
98 | i->openmin = 0; | |
99 | } | |
100 | } | |
101 | if (snd_interval_checkempty(i)) { | |
102 | snd_interval_none(i); | |
103 | return -EINVAL; | |
104 | } | |
105 | return changed; | |
106 | } | |
107 | ||
108 | static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) | |
109 | { | |
110 | int changed = 0; | |
111 | if (i->max > max) { | |
112 | i->max = max; | |
113 | i->openmax = openmax; | |
114 | changed = 1; | |
115 | } else if (i->max == max && !i->openmax && openmax) { | |
116 | i->openmax = 1; | |
117 | changed = 1; | |
118 | } | |
119 | if (i->integer) { | |
120 | if (i->openmax) { | |
121 | i->max--; | |
122 | i->openmax = 0; | |
123 | } | |
124 | } | |
125 | if (snd_interval_checkempty(i)) { | |
126 | snd_interval_none(i); | |
127 | return -EINVAL; | |
128 | } | |
129 | return changed; | |
130 | } | |
131 | ||
132 | static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) | |
133 | { | |
134 | struct snd_interval t; | |
135 | t.empty = 0; | |
136 | t.min = t.max = val; | |
137 | t.openmin = t.openmax = 0; | |
138 | t.integer = 1; | |
139 | return snd_interval_refine(i, &t); | |
140 | } | |
141 | ||
142 | /** | |
143 | * snd_pcm_hw_param_value_min | |
144 | * @params: the hw_params instance | |
145 | * @var: parameter to retrieve | |
146 | * @dir: pointer to the direction (-1,0,1) or NULL | |
147 | * | |
148 | * Return the minimum value for field PAR. | |
149 | */ | |
150 | static unsigned int | |
151 | snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, | |
152 | snd_pcm_hw_param_t var, int *dir) | |
153 | { | |
154 | if (hw_is_mask(var)) { | |
155 | if (dir) | |
156 | *dir = 0; | |
157 | return snd_mask_min(hw_param_mask_c(params, var)); | |
158 | } | |
159 | if (hw_is_interval(var)) { | |
160 | const struct snd_interval *i = hw_param_interval_c(params, var); | |
161 | if (dir) | |
162 | *dir = i->openmin; | |
163 | return snd_interval_min(i); | |
164 | } | |
165 | return -EINVAL; | |
166 | } | |
167 | ||
168 | /** | |
169 | * snd_pcm_hw_param_value_max | |
170 | * @params: the hw_params instance | |
171 | * @var: parameter to retrieve | |
172 | * @dir: pointer to the direction (-1,0,1) or NULL | |
173 | * | |
174 | * Return the maximum value for field PAR. | |
175 | */ | |
176 | static unsigned int | |
177 | snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, | |
178 | snd_pcm_hw_param_t var, int *dir) | |
179 | { | |
180 | if (hw_is_mask(var)) { | |
181 | if (dir) | |
182 | *dir = 0; | |
183 | return snd_mask_max(hw_param_mask_c(params, var)); | |
184 | } | |
185 | if (hw_is_interval(var)) { | |
186 | const struct snd_interval *i = hw_param_interval_c(params, var); | |
187 | if (dir) | |
188 | *dir = - (int) i->openmax; | |
189 | return snd_interval_max(i); | |
190 | } | |
191 | return -EINVAL; | |
192 | } | |
193 | ||
194 | static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, | |
195 | snd_pcm_hw_param_t var, | |
196 | const struct snd_mask *val) | |
197 | { | |
198 | int changed; | |
199 | changed = snd_mask_refine(hw_param_mask(params, var), val); | |
200 | if (changed) { | |
201 | params->cmask |= 1 << var; | |
202 | params->rmask |= 1 << var; | |
203 | } | |
204 | return changed; | |
205 | } | |
206 | ||
207 | static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, | |
208 | struct snd_pcm_hw_params *params, | |
209 | snd_pcm_hw_param_t var, | |
210 | const struct snd_mask *val) | |
211 | { | |
212 | int changed = _snd_pcm_hw_param_mask(params, var, val); | |
213 | if (changed < 0) | |
214 | return changed; | |
215 | if (params->rmask) { | |
216 | int err = snd_pcm_hw_refine(pcm, params); | |
217 | if (err < 0) | |
218 | return err; | |
219 | } | |
220 | return 0; | |
221 | } | |
222 | ||
223 | static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, | |
224 | snd_pcm_hw_param_t var, unsigned int val, | |
225 | int dir) | |
226 | { | |
227 | int changed; | |
228 | int open = 0; | |
229 | if (dir) { | |
230 | if (dir > 0) { | |
231 | open = 1; | |
232 | } else if (dir < 0) { | |
233 | if (val > 0) { | |
234 | open = 1; | |
235 | val--; | |
236 | } | |
237 | } | |
238 | } | |
239 | if (hw_is_mask(var)) | |
240 | changed = snd_mask_refine_min(hw_param_mask(params, var), | |
241 | val + !!open); | |
242 | else if (hw_is_interval(var)) | |
243 | changed = snd_interval_refine_min(hw_param_interval(params, var), | |
244 | val, open); | |
245 | else | |
246 | return -EINVAL; | |
247 | if (changed) { | |
248 | params->cmask |= 1 << var; | |
249 | params->rmask |= 1 << var; | |
250 | } | |
251 | return changed; | |
252 | } | |
253 | ||
254 | /** | |
255 | * snd_pcm_hw_param_min | |
256 | * @pcm: PCM instance | |
257 | * @params: the hw_params instance | |
258 | * @var: parameter to retrieve | |
259 | * @val: minimal value | |
260 | * @dir: pointer to the direction (-1,0,1) or NULL | |
261 | * | |
262 | * Inside configuration space defined by PARAMS remove from PAR all | |
263 | * values < VAL. Reduce configuration space accordingly. | |
264 | * Return new minimum or -EINVAL if the configuration space is empty | |
265 | */ | |
266 | static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, | |
267 | struct snd_pcm_hw_params *params, | |
268 | snd_pcm_hw_param_t var, unsigned int val, | |
269 | int *dir) | |
270 | { | |
271 | int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); | |
272 | if (changed < 0) | |
273 | return changed; | |
274 | if (params->rmask) { | |
275 | int err = snd_pcm_hw_refine(pcm, params); | |
276 | if (err < 0) | |
277 | return err; | |
278 | } | |
279 | return snd_pcm_hw_param_value_min(params, var, dir); | |
280 | } | |
281 | ||
282 | static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, | |
283 | snd_pcm_hw_param_t var, unsigned int val, | |
284 | int dir) | |
285 | { | |
286 | int changed; | |
287 | int open = 0; | |
288 | if (dir) { | |
289 | if (dir < 0) { | |
290 | open = 1; | |
291 | } else if (dir > 0) { | |
292 | open = 1; | |
293 | val++; | |
294 | } | |
295 | } | |
296 | if (hw_is_mask(var)) { | |
297 | if (val == 0 && open) { | |
298 | snd_mask_none(hw_param_mask(params, var)); | |
299 | changed = -EINVAL; | |
300 | } else | |
301 | changed = snd_mask_refine_max(hw_param_mask(params, var), | |
302 | val - !!open); | |
303 | } else if (hw_is_interval(var)) | |
304 | changed = snd_interval_refine_max(hw_param_interval(params, var), | |
305 | val, open); | |
306 | else | |
307 | return -EINVAL; | |
308 | if (changed) { | |
309 | params->cmask |= 1 << var; | |
310 | params->rmask |= 1 << var; | |
311 | } | |
312 | return changed; | |
313 | } | |
314 | ||
315 | /** | |
316 | * snd_pcm_hw_param_max | |
317 | * @pcm: PCM instance | |
318 | * @params: the hw_params instance | |
319 | * @var: parameter to retrieve | |
320 | * @val: maximal value | |
321 | * @dir: pointer to the direction (-1,0,1) or NULL | |
322 | * | |
323 | * Inside configuration space defined by PARAMS remove from PAR all | |
324 | * values >= VAL + 1. Reduce configuration space accordingly. | |
325 | * Return new maximum or -EINVAL if the configuration space is empty | |
326 | */ | |
327 | static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, | |
328 | struct snd_pcm_hw_params *params, | |
329 | snd_pcm_hw_param_t var, unsigned int val, | |
330 | int *dir) | |
331 | { | |
332 | int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); | |
333 | if (changed < 0) | |
334 | return changed; | |
335 | if (params->rmask) { | |
336 | int err = snd_pcm_hw_refine(pcm, params); | |
337 | if (err < 0) | |
338 | return err; | |
339 | } | |
340 | return snd_pcm_hw_param_value_max(params, var, dir); | |
341 | } | |
342 | ||
343 | static int boundary_sub(int a, int adir, | |
344 | int b, int bdir, | |
345 | int *c, int *cdir) | |
346 | { | |
347 | adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); | |
348 | bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); | |
349 | *c = a - b; | |
350 | *cdir = adir - bdir; | |
351 | if (*cdir == -2) { | |
352 | (*c)--; | |
353 | } else if (*cdir == 2) { | |
354 | (*c)++; | |
355 | } | |
356 | return 0; | |
357 | } | |
358 | ||
359 | static int boundary_lt(unsigned int a, int adir, | |
360 | unsigned int b, int bdir) | |
361 | { | |
362 | if (adir < 0) { | |
363 | a--; | |
364 | adir = 1; | |
365 | } else if (adir > 0) | |
366 | adir = 1; | |
367 | if (bdir < 0) { | |
368 | b--; | |
369 | bdir = 1; | |
370 | } else if (bdir > 0) | |
371 | bdir = 1; | |
372 | return a < b || (a == b && adir < bdir); | |
373 | } | |
374 | ||
375 | /* Return 1 if min is nearer to best than max */ | |
376 | static int boundary_nearer(int min, int mindir, | |
377 | int best, int bestdir, | |
378 | int max, int maxdir) | |
379 | { | |
380 | int dmin, dmindir; | |
381 | int dmax, dmaxdir; | |
382 | boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); | |
383 | boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); | |
384 | return boundary_lt(dmin, dmindir, dmax, dmaxdir); | |
385 | } | |
386 | ||
387 | /** | |
388 | * snd_pcm_hw_param_near | |
389 | * @pcm: PCM instance | |
390 | * @params: the hw_params instance | |
391 | * @var: parameter to retrieve | |
392 | * @best: value to set | |
393 | * @dir: pointer to the direction (-1,0,1) or NULL | |
394 | * | |
395 | * Inside configuration space defined by PARAMS set PAR to the available value | |
396 | * nearest to VAL. Reduce configuration space accordingly. | |
397 | * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, | |
398 | * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. | |
399 | * Return the value found. | |
400 | */ | |
401 | static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, | |
402 | struct snd_pcm_hw_params *params, | |
403 | snd_pcm_hw_param_t var, unsigned int best, | |
404 | int *dir) | |
405 | { | |
406 | struct snd_pcm_hw_params *save = NULL; | |
407 | int v; | |
408 | unsigned int saved_min; | |
409 | int last = 0; | |
410 | int min, max; | |
411 | int mindir, maxdir; | |
412 | int valdir = dir ? *dir : 0; | |
413 | /* FIXME */ | |
414 | if (best > INT_MAX) | |
415 | best = INT_MAX; | |
416 | min = max = best; | |
417 | mindir = maxdir = valdir; | |
418 | if (maxdir > 0) | |
419 | maxdir = 0; | |
420 | else if (maxdir == 0) | |
421 | maxdir = -1; | |
422 | else { | |
423 | maxdir = 1; | |
424 | max--; | |
425 | } | |
426 | save = kmalloc(sizeof(*save), GFP_KERNEL); | |
427 | if (save == NULL) | |
428 | return -ENOMEM; | |
429 | *save = *params; | |
430 | saved_min = min; | |
431 | min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); | |
432 | if (min >= 0) { | |
433 | struct snd_pcm_hw_params *params1; | |
434 | if (max < 0) | |
435 | goto _end; | |
436 | if ((unsigned int)min == saved_min && mindir == valdir) | |
437 | goto _end; | |
438 | params1 = kmalloc(sizeof(*params1), GFP_KERNEL); | |
439 | if (params1 == NULL) { | |
440 | kfree(save); | |
441 | return -ENOMEM; | |
442 | } | |
443 | *params1 = *save; | |
444 | max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); | |
445 | if (max < 0) { | |
446 | kfree(params1); | |
447 | goto _end; | |
448 | } | |
449 | if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { | |
450 | *params = *params1; | |
451 | last = 1; | |
452 | } | |
453 | kfree(params1); | |
454 | } else { | |
455 | *params = *save; | |
456 | max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); | |
3daa7ea6 JJ |
457 | if (max < 0) { |
458 | kfree(save); | |
7eaa943c | 459 | return max; |
3daa7ea6 | 460 | } |
e88e8ae6 TI |
461 | last = 1; |
462 | } | |
463 | _end: | |
464 | kfree(save); | |
465 | if (last) | |
466 | v = snd_pcm_hw_param_last(pcm, params, var, dir); | |
467 | else | |
468 | v = snd_pcm_hw_param_first(pcm, params, var, dir); | |
7eaa943c | 469 | snd_BUG_ON(v < 0); |
e88e8ae6 TI |
470 | return v; |
471 | } | |
472 | ||
473 | static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, | |
474 | snd_pcm_hw_param_t var, unsigned int val, | |
475 | int dir) | |
476 | { | |
477 | int changed; | |
478 | if (hw_is_mask(var)) { | |
479 | struct snd_mask *m = hw_param_mask(params, var); | |
480 | if (val == 0 && dir < 0) { | |
481 | changed = -EINVAL; | |
482 | snd_mask_none(m); | |
483 | } else { | |
484 | if (dir > 0) | |
485 | val++; | |
486 | else if (dir < 0) | |
487 | val--; | |
488 | changed = snd_mask_refine_set(hw_param_mask(params, var), val); | |
489 | } | |
490 | } else if (hw_is_interval(var)) { | |
491 | struct snd_interval *i = hw_param_interval(params, var); | |
492 | if (val == 0 && dir < 0) { | |
493 | changed = -EINVAL; | |
494 | snd_interval_none(i); | |
495 | } else if (dir == 0) | |
496 | changed = snd_interval_refine_set(i, val); | |
497 | else { | |
498 | struct snd_interval t; | |
499 | t.openmin = 1; | |
500 | t.openmax = 1; | |
501 | t.empty = 0; | |
502 | t.integer = 0; | |
503 | if (dir < 0) { | |
504 | t.min = val - 1; | |
505 | t.max = val; | |
506 | } else { | |
507 | t.min = val; | |
508 | t.max = val+1; | |
509 | } | |
510 | changed = snd_interval_refine(i, &t); | |
511 | } | |
512 | } else | |
513 | return -EINVAL; | |
514 | if (changed) { | |
515 | params->cmask |= 1 << var; | |
516 | params->rmask |= 1 << var; | |
517 | } | |
518 | return changed; | |
519 | } | |
520 | ||
521 | /** | |
522 | * snd_pcm_hw_param_set | |
523 | * @pcm: PCM instance | |
524 | * @params: the hw_params instance | |
525 | * @var: parameter to retrieve | |
526 | * @val: value to set | |
527 | * @dir: pointer to the direction (-1,0,1) or NULL | |
528 | * | |
529 | * Inside configuration space defined by PARAMS remove from PAR all | |
530 | * values != VAL. Reduce configuration space accordingly. | |
531 | * Return VAL or -EINVAL if the configuration space is empty | |
532 | */ | |
533 | static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, | |
534 | struct snd_pcm_hw_params *params, | |
535 | snd_pcm_hw_param_t var, unsigned int val, | |
536 | int dir) | |
537 | { | |
538 | int changed = _snd_pcm_hw_param_set(params, var, val, dir); | |
539 | if (changed < 0) | |
540 | return changed; | |
541 | if (params->rmask) { | |
542 | int err = snd_pcm_hw_refine(pcm, params); | |
543 | if (err < 0) | |
544 | return err; | |
545 | } | |
546 | return snd_pcm_hw_param_value(params, var, NULL); | |
547 | } | |
548 | ||
549 | static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, | |
550 | snd_pcm_hw_param_t var) | |
551 | { | |
552 | int changed; | |
553 | changed = snd_interval_setinteger(hw_param_interval(params, var)); | |
554 | if (changed) { | |
555 | params->cmask |= 1 << var; | |
556 | params->rmask |= 1 << var; | |
557 | } | |
558 | return changed; | |
559 | } | |
560 | ||
561 | /* | |
562 | * plugin | |
563 | */ | |
564 | ||
21a3479a | 565 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
6ac77bc1 | 566 | static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) |
1da177e4 | 567 | { |
6ac77bc1 TI |
568 | struct snd_pcm_runtime *runtime = substream->runtime; |
569 | struct snd_pcm_plugin *plugin, *next; | |
1da177e4 LT |
570 | |
571 | plugin = runtime->oss.plugin_first; | |
572 | while (plugin) { | |
573 | next = plugin->next; | |
574 | snd_pcm_plugin_free(plugin); | |
575 | plugin = next; | |
576 | } | |
577 | runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; | |
578 | return 0; | |
579 | } | |
580 | ||
6ac77bc1 | 581 | static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) |
1da177e4 | 582 | { |
6ac77bc1 | 583 | struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
1da177e4 LT |
584 | plugin->next = runtime->oss.plugin_first; |
585 | plugin->prev = NULL; | |
586 | if (runtime->oss.plugin_first) { | |
587 | runtime->oss.plugin_first->prev = plugin; | |
588 | runtime->oss.plugin_first = plugin; | |
589 | } else { | |
590 | runtime->oss.plugin_last = | |
591 | runtime->oss.plugin_first = plugin; | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | ||
6ac77bc1 | 596 | int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) |
1da177e4 | 597 | { |
6ac77bc1 | 598 | struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
1da177e4 LT |
599 | plugin->next = NULL; |
600 | plugin->prev = runtime->oss.plugin_last; | |
601 | if (runtime->oss.plugin_last) { | |
602 | runtime->oss.plugin_last->next = plugin; | |
603 | runtime->oss.plugin_last = plugin; | |
604 | } else { | |
605 | runtime->oss.plugin_last = | |
606 | runtime->oss.plugin_first = plugin; | |
607 | } | |
608 | return 0; | |
609 | } | |
21a3479a | 610 | #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ |
1da177e4 | 611 | |
6ac77bc1 | 612 | static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) |
1da177e4 | 613 | { |
6ac77bc1 | 614 | struct snd_pcm_runtime *runtime = substream->runtime; |
af081613 | 615 | long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
bfc5bddb | 616 | long bytes = frames_to_bytes(runtime, frames); |
1da177e4 | 617 | if (buffer_size == runtime->oss.buffer_bytes) |
bfc5bddb | 618 | return bytes; |
cdc5c53f TI |
619 | #if BITS_PER_LONG >= 64 |
620 | return runtime->oss.buffer_bytes * bytes / buffer_size; | |
621 | #else | |
622 | { | |
623 | u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; | |
3f7440a6 | 624 | return div_u64(bsize, buffer_size); |
cdc5c53f TI |
625 | } |
626 | #endif | |
1da177e4 LT |
627 | } |
628 | ||
6ac77bc1 | 629 | static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) |
1da177e4 | 630 | { |
6ac77bc1 | 631 | struct snd_pcm_runtime *runtime = substream->runtime; |
af081613 | 632 | long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
1da177e4 LT |
633 | if (buffer_size == runtime->oss.buffer_bytes) |
634 | return bytes_to_frames(runtime, bytes); | |
635 | return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); | |
636 | } | |
637 | ||
f240406b JK |
638 | static inline |
639 | snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) | |
640 | { | |
e7636925 | 641 | return runtime->hw_ptr_interrupt; |
f240406b JK |
642 | } |
643 | ||
24038a25 TI |
644 | /* define extended formats in the recent OSS versions (if any) */ |
645 | /* linear formats */ | |
646 | #define AFMT_S32_LE 0x00001000 | |
647 | #define AFMT_S32_BE 0x00002000 | |
648 | #define AFMT_S24_LE 0x00008000 | |
649 | #define AFMT_S24_BE 0x00010000 | |
650 | #define AFMT_S24_PACKED 0x00040000 | |
651 | ||
652 | /* other supported formats */ | |
653 | #define AFMT_FLOAT 0x00004000 | |
654 | #define AFMT_SPDIF_RAW 0x00020000 | |
655 | ||
656 | /* unsupported formats */ | |
657 | #define AFMT_AC3 0x00000400 | |
658 | #define AFMT_VORBIS 0x00000800 | |
659 | ||
fea952e5 | 660 | static snd_pcm_format_t snd_pcm_oss_format_from(int format) |
1da177e4 LT |
661 | { |
662 | switch (format) { | |
663 | case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; | |
664 | case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; | |
665 | case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; | |
666 | case AFMT_U8: return SNDRV_PCM_FORMAT_U8; | |
667 | case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; | |
668 | case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; | |
669 | case AFMT_S8: return SNDRV_PCM_FORMAT_S8; | |
670 | case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; | |
671 | case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; | |
672 | case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; | |
24038a25 TI |
673 | case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; |
674 | case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; | |
675 | case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; | |
676 | case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; | |
677 | case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; | |
678 | case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; | |
679 | case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; | |
1da177e4 LT |
680 | default: return SNDRV_PCM_FORMAT_U8; |
681 | } | |
682 | } | |
683 | ||
fea952e5 | 684 | static int snd_pcm_oss_format_to(snd_pcm_format_t format) |
1da177e4 LT |
685 | { |
686 | switch (format) { | |
687 | case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; | |
688 | case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; | |
689 | case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; | |
690 | case SNDRV_PCM_FORMAT_U8: return AFMT_U8; | |
691 | case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; | |
692 | case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; | |
693 | case SNDRV_PCM_FORMAT_S8: return AFMT_S8; | |
694 | case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; | |
695 | case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; | |
696 | case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; | |
24038a25 TI |
697 | case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; |
698 | case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; | |
699 | case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; | |
700 | case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; | |
701 | case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; | |
702 | case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; | |
703 | case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; | |
1da177e4 LT |
704 | default: return -EINVAL; |
705 | } | |
706 | } | |
707 | ||
6ac77bc1 TI |
708 | static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, |
709 | struct snd_pcm_hw_params *oss_params, | |
710 | struct snd_pcm_hw_params *slave_params) | |
1da177e4 LT |
711 | { |
712 | size_t s; | |
713 | size_t oss_buffer_size, oss_period_size, oss_periods; | |
714 | size_t min_period_size, max_period_size; | |
6ac77bc1 | 715 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
716 | size_t oss_frame_size; |
717 | ||
718 | oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * | |
719 | params_channels(oss_params) / 8; | |
720 | ||
721 | oss_buffer_size = snd_pcm_plug_client_size(substream, | |
722 | snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; | |
f6dbe1be | 723 | oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); |
9c323fcb | 724 | if (atomic_read(&substream->mmap_count)) { |
1da177e4 LT |
725 | if (oss_buffer_size > runtime->oss.mmap_bytes) |
726 | oss_buffer_size = runtime->oss.mmap_bytes; | |
727 | } | |
728 | ||
060d77b9 TI |
729 | if (substream->oss.setup.period_size > 16) |
730 | oss_period_size = substream->oss.setup.period_size; | |
1da177e4 LT |
731 | else if (runtime->oss.fragshift) { |
732 | oss_period_size = 1 << runtime->oss.fragshift; | |
733 | if (oss_period_size > oss_buffer_size / 2) | |
734 | oss_period_size = oss_buffer_size / 2; | |
735 | } else { | |
736 | int sd; | |
737 | size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; | |
738 | ||
739 | oss_period_size = oss_buffer_size; | |
740 | do { | |
741 | oss_period_size /= 2; | |
742 | } while (oss_period_size > bytes_per_sec); | |
743 | if (runtime->oss.subdivision == 0) { | |
744 | sd = 4; | |
745 | if (oss_period_size / sd > 4096) | |
746 | sd *= 2; | |
747 | if (oss_period_size / sd < 4096) | |
748 | sd = 1; | |
749 | } else | |
750 | sd = runtime->oss.subdivision; | |
751 | oss_period_size /= sd; | |
752 | if (oss_period_size < 16) | |
753 | oss_period_size = 16; | |
754 | } | |
755 | ||
756 | min_period_size = snd_pcm_plug_client_size(substream, | |
757 | snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); | |
758 | min_period_size *= oss_frame_size; | |
f6dbe1be | 759 | min_period_size = roundup_pow_of_two(min_period_size); |
1da177e4 LT |
760 | if (oss_period_size < min_period_size) |
761 | oss_period_size = min_period_size; | |
762 | ||
763 | max_period_size = snd_pcm_plug_client_size(substream, | |
764 | snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); | |
765 | max_period_size *= oss_frame_size; | |
f6dbe1be | 766 | max_period_size = rounddown_pow_of_two(max_period_size); |
1da177e4 LT |
767 | if (oss_period_size > max_period_size) |
768 | oss_period_size = max_period_size; | |
769 | ||
770 | oss_periods = oss_buffer_size / oss_period_size; | |
771 | ||
060d77b9 TI |
772 | if (substream->oss.setup.periods > 1) |
773 | oss_periods = substream->oss.setup.periods; | |
1da177e4 LT |
774 | |
775 | s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); | |
776 | if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) | |
777 | s = runtime->oss.maxfrags; | |
778 | if (oss_periods > s) | |
779 | oss_periods = s; | |
780 | ||
781 | s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); | |
782 | if (s < 2) | |
783 | s = 2; | |
784 | if (oss_periods < s) | |
785 | oss_periods = s; | |
786 | ||
787 | while (oss_period_size * oss_periods > oss_buffer_size) | |
788 | oss_period_size /= 2; | |
789 | ||
7eaa943c TI |
790 | if (oss_period_size < 16) |
791 | return -EINVAL; | |
1da177e4 LT |
792 | runtime->oss.period_bytes = oss_period_size; |
793 | runtime->oss.period_frames = 1; | |
794 | runtime->oss.periods = oss_periods; | |
795 | return 0; | |
796 | } | |
797 | ||
6ac77bc1 TI |
798 | static int choose_rate(struct snd_pcm_substream *substream, |
799 | struct snd_pcm_hw_params *params, unsigned int best_rate) | |
1da177e4 | 800 | { |
6ac77bc1 TI |
801 | struct snd_interval *it; |
802 | struct snd_pcm_hw_params *save; | |
1da177e4 LT |
803 | unsigned int rate, prev; |
804 | ||
805 | save = kmalloc(sizeof(*save), GFP_KERNEL); | |
806 | if (save == NULL) | |
807 | return -ENOMEM; | |
808 | *save = *params; | |
809 | it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); | |
810 | ||
811 | /* try multiples of the best rate */ | |
812 | rate = best_rate; | |
813 | for (;;) { | |
814 | if (it->max < rate || (it->max == rate && it->openmax)) | |
815 | break; | |
816 | if (it->min < rate || (it->min == rate && !it->openmin)) { | |
817 | int ret; | |
818 | ret = snd_pcm_hw_param_set(substream, params, | |
819 | SNDRV_PCM_HW_PARAM_RATE, | |
820 | rate, 0); | |
821 | if (ret == (int)rate) { | |
822 | kfree(save); | |
823 | return rate; | |
824 | } | |
825 | *params = *save; | |
826 | } | |
827 | prev = rate; | |
828 | rate += best_rate; | |
829 | if (rate <= prev) | |
830 | break; | |
831 | } | |
832 | ||
833 | /* not found, use the nearest rate */ | |
834 | kfree(save); | |
835 | return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); | |
836 | } | |
837 | ||
b2483716 TI |
838 | static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, |
839 | bool trylock) | |
1da177e4 | 840 | { |
6ac77bc1 TI |
841 | struct snd_pcm_runtime *runtime = substream->runtime; |
842 | struct snd_pcm_hw_params *params, *sparams; | |
843 | struct snd_pcm_sw_params *sw_params; | |
1da177e4 LT |
844 | ssize_t oss_buffer_size, oss_period_size; |
845 | size_t oss_frame_size; | |
846 | int err; | |
847 | int direct; | |
fea952e5 CL |
848 | snd_pcm_format_t format, sformat; |
849 | int n; | |
6ac77bc1 TI |
850 | struct snd_mask sformat_mask; |
851 | struct snd_mask mask; | |
1da177e4 | 852 | |
b2483716 TI |
853 | if (trylock) { |
854 | if (!(mutex_trylock(&runtime->oss.params_lock))) | |
855 | return -EAGAIN; | |
856 | } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) | |
e3a5d59a | 857 | return -EINTR; |
46325371 | 858 | sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); |
1da177e4 LT |
859 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
860 | sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); | |
861 | if (!sw_params || !params || !sparams) { | |
1da177e4 LT |
862 | err = -ENOMEM; |
863 | goto failure; | |
864 | } | |
865 | ||
9c323fcb | 866 | if (atomic_read(&substream->mmap_count)) |
1da177e4 | 867 | direct = 1; |
060d77b9 TI |
868 | else |
869 | direct = substream->oss.setup.direct; | |
1da177e4 LT |
870 | |
871 | _snd_pcm_hw_params_any(sparams); | |
872 | _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); | |
873 | _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); | |
874 | snd_mask_none(&mask); | |
9c323fcb | 875 | if (atomic_read(&substream->mmap_count)) |
fea952e5 | 876 | snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); |
1da177e4 | 877 | else { |
fea952e5 | 878 | snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
1da177e4 | 879 | if (!direct) |
fea952e5 | 880 | snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
1da177e4 LT |
881 | } |
882 | err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); | |
883 | if (err < 0) { | |
61efcee8 | 884 | pcm_dbg(substream->pcm, "No usable accesses\n"); |
1da177e4 LT |
885 | err = -EINVAL; |
886 | goto failure; | |
887 | } | |
888 | choose_rate(substream, sparams, runtime->oss.rate); | |
889 | snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); | |
890 | ||
891 | format = snd_pcm_oss_format_from(runtime->oss.format); | |
892 | ||
893 | sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); | |
894 | if (direct) | |
895 | sformat = format; | |
896 | else | |
897 | sformat = snd_pcm_plug_slave_format(format, &sformat_mask); | |
898 | ||
fea952e5 CL |
899 | if ((__force int)sformat < 0 || |
900 | !snd_mask_test(&sformat_mask, (__force int)sformat)) { | |
901 | for (sformat = (__force snd_pcm_format_t)0; | |
902 | (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; | |
903 | sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { | |
904 | if (snd_mask_test(&sformat_mask, (__force int)sformat) && | |
1da177e4 LT |
905 | snd_pcm_oss_format_to(sformat) >= 0) |
906 | break; | |
907 | } | |
fea952e5 | 908 | if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { |
61efcee8 | 909 | pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); |
1da177e4 LT |
910 | err = -EINVAL; |
911 | goto failure; | |
912 | } | |
913 | } | |
fea952e5 | 914 | err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); |
7eaa943c TI |
915 | if (err < 0) |
916 | goto failure; | |
1da177e4 LT |
917 | |
918 | if (direct) { | |
919 | memcpy(params, sparams, sizeof(*params)); | |
920 | } else { | |
921 | _snd_pcm_hw_params_any(params); | |
922 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, | |
fea952e5 | 923 | (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); |
1da177e4 | 924 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, |
fea952e5 | 925 | (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); |
1da177e4 LT |
926 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, |
927 | runtime->oss.channels, 0); | |
928 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, | |
929 | runtime->oss.rate, 0); | |
930 | pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", | |
931 | params_access(params), params_format(params), | |
932 | params_channels(params), params_rate(params)); | |
933 | } | |
934 | pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", | |
935 | params_access(sparams), params_format(sparams), | |
936 | params_channels(sparams), params_rate(sparams)); | |
937 | ||
938 | oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * | |
939 | params_channels(params) / 8; | |
940 | ||
21a3479a | 941 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 LT |
942 | snd_pcm_oss_plugin_clear(substream); |
943 | if (!direct) { | |
944 | /* add necessary plugins */ | |
945 | snd_pcm_oss_plugin_clear(substream); | |
946 | if ((err = snd_pcm_plug_format_plugins(substream, | |
947 | params, | |
948 | sparams)) < 0) { | |
61efcee8 TI |
949 | pcm_dbg(substream->pcm, |
950 | "snd_pcm_plug_format_plugins failed: %i\n", err); | |
1da177e4 LT |
951 | snd_pcm_oss_plugin_clear(substream); |
952 | goto failure; | |
953 | } | |
954 | if (runtime->oss.plugin_first) { | |
6ac77bc1 | 955 | struct snd_pcm_plugin *plugin; |
1da177e4 | 956 | if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { |
61efcee8 TI |
957 | pcm_dbg(substream->pcm, |
958 | "snd_pcm_plugin_build_io failed: %i\n", err); | |
1da177e4 LT |
959 | snd_pcm_oss_plugin_clear(substream); |
960 | goto failure; | |
961 | } | |
962 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
963 | err = snd_pcm_plugin_append(plugin); | |
964 | } else { | |
965 | err = snd_pcm_plugin_insert(plugin); | |
966 | } | |
967 | if (err < 0) { | |
968 | snd_pcm_oss_plugin_clear(substream); | |
969 | goto failure; | |
970 | } | |
971 | } | |
972 | } | |
21a3479a | 973 | #endif |
1da177e4 LT |
974 | |
975 | err = snd_pcm_oss_period_size(substream, params, sparams); | |
976 | if (err < 0) | |
977 | goto failure; | |
978 | ||
979 | n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); | |
980 | err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); | |
7eaa943c TI |
981 | if (err < 0) |
982 | goto failure; | |
1da177e4 LT |
983 | |
984 | err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, | |
985 | runtime->oss.periods, NULL); | |
7eaa943c TI |
986 | if (err < 0) |
987 | goto failure; | |
1da177e4 LT |
988 | |
989 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); | |
990 | ||
991 | if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { | |
61efcee8 | 992 | pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); |
1da177e4 LT |
993 | goto failure; |
994 | } | |
995 | ||
1da177e4 LT |
996 | if (runtime->oss.trigger) { |
997 | sw_params->start_threshold = 1; | |
998 | } else { | |
999 | sw_params->start_threshold = runtime->boundary; | |
1000 | } | |
9c323fcb TI |
1001 | if (atomic_read(&substream->mmap_count) || |
1002 | substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
1da177e4 LT |
1003 | sw_params->stop_threshold = runtime->boundary; |
1004 | else | |
1005 | sw_params->stop_threshold = runtime->buffer_size; | |
1006 | sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
1007 | sw_params->period_step = 1; | |
004e6538 TI |
1008 | sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? |
1009 | 1 : runtime->period_size; | |
9c323fcb | 1010 | if (atomic_read(&substream->mmap_count) || |
060d77b9 | 1011 | substream->oss.setup.nosilence) { |
1da177e4 LT |
1012 | sw_params->silence_threshold = 0; |
1013 | sw_params->silence_size = 0; | |
1014 | } else { | |
1015 | snd_pcm_uframes_t frames; | |
1016 | frames = runtime->period_size + 16; | |
1017 | if (frames > runtime->buffer_size) | |
1018 | frames = runtime->buffer_size; | |
1019 | sw_params->silence_threshold = frames; | |
1020 | sw_params->silence_size = frames; | |
1021 | } | |
1022 | ||
1023 | if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { | |
61efcee8 | 1024 | pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); |
1da177e4 LT |
1025 | goto failure; |
1026 | } | |
1027 | ||
1028 | runtime->oss.periods = params_periods(sparams); | |
1029 | oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); | |
7eaa943c TI |
1030 | if (oss_period_size < 0) { |
1031 | err = -EINVAL; | |
1032 | goto failure; | |
1033 | } | |
21a3479a | 1034 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 LT |
1035 | if (runtime->oss.plugin_first) { |
1036 | err = snd_pcm_plug_alloc(substream, oss_period_size); | |
1037 | if (err < 0) | |
1038 | goto failure; | |
1039 | } | |
21a3479a | 1040 | #endif |
1da177e4 LT |
1041 | oss_period_size *= oss_frame_size; |
1042 | ||
1043 | oss_buffer_size = oss_period_size * runtime->oss.periods; | |
7eaa943c TI |
1044 | if (oss_buffer_size < 0) { |
1045 | err = -EINVAL; | |
1046 | goto failure; | |
1047 | } | |
1da177e4 LT |
1048 | |
1049 | runtime->oss.period_bytes = oss_period_size; | |
1050 | runtime->oss.buffer_bytes = oss_buffer_size; | |
1051 | ||
1052 | pdprintf("oss: period bytes = %i, buffer bytes = %i\n", | |
1053 | runtime->oss.period_bytes, | |
1054 | runtime->oss.buffer_bytes); | |
1055 | pdprintf("slave: period_size = %i, buffer_size = %i\n", | |
1056 | params_period_size(sparams), | |
1057 | params_buffer_size(sparams)); | |
1058 | ||
1059 | runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); | |
1060 | runtime->oss.channels = params_channels(params); | |
1061 | runtime->oss.rate = params_rate(params); | |
1062 | ||
1da177e4 LT |
1063 | vfree(runtime->oss.buffer); |
1064 | runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); | |
cbbb0570 RK |
1065 | if (!runtime->oss.buffer) { |
1066 | err = -ENOMEM; | |
1067 | goto failure; | |
1068 | } | |
1069 | ||
1070 | runtime->oss.params = 0; | |
1071 | runtime->oss.prepare = 1; | |
1da177e4 LT |
1072 | runtime->oss.buffer_used = 0; |
1073 | if (runtime->dma_area) | |
1074 | snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); | |
1075 | ||
1076 | runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); | |
1077 | ||
1078 | err = 0; | |
1079 | failure: | |
1080 | kfree(sw_params); | |
1081 | kfree(params); | |
1082 | kfree(sparams); | |
e3a5d59a | 1083 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 LT |
1084 | return err; |
1085 | } | |
1086 | ||
6ac77bc1 | 1087 | static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) |
1da177e4 LT |
1088 | { |
1089 | int idx, err; | |
6ac77bc1 | 1090 | struct snd_pcm_substream *asubstream = NULL, *substream; |
1da177e4 LT |
1091 | |
1092 | for (idx = 0; idx < 2; idx++) { | |
1093 | substream = pcm_oss_file->streams[idx]; | |
1094 | if (substream == NULL) | |
1095 | continue; | |
1096 | if (asubstream == NULL) | |
1097 | asubstream = substream; | |
1098 | if (substream->runtime->oss.params) { | |
b2483716 | 1099 | err = snd_pcm_oss_change_params(substream, false); |
1da177e4 LT |
1100 | if (err < 0) |
1101 | return err; | |
1102 | } | |
1103 | } | |
7eaa943c TI |
1104 | if (!asubstream) |
1105 | return -EIO; | |
1da177e4 LT |
1106 | if (r_substream) |
1107 | *r_substream = asubstream; | |
1108 | return 0; | |
1109 | } | |
1110 | ||
6ac77bc1 | 1111 | static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) |
1da177e4 LT |
1112 | { |
1113 | int err; | |
6ac77bc1 | 1114 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1115 | |
1116 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); | |
1117 | if (err < 0) { | |
61efcee8 TI |
1118 | pcm_dbg(substream->pcm, |
1119 | "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); | |
1da177e4 LT |
1120 | return err; |
1121 | } | |
1122 | runtime->oss.prepare = 0; | |
f240406b | 1123 | runtime->oss.prev_hw_ptr_period = 0; |
1da177e4 LT |
1124 | runtime->oss.period_ptr = 0; |
1125 | runtime->oss.buffer_used = 0; | |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
6ac77bc1 | 1130 | static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) |
1da177e4 | 1131 | { |
6ac77bc1 | 1132 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1133 | int err; |
1134 | ||
1135 | if (substream == NULL) | |
1136 | return 0; | |
1137 | runtime = substream->runtime; | |
1138 | if (runtime->oss.params) { | |
b2483716 | 1139 | err = snd_pcm_oss_change_params(substream, false); |
1da177e4 LT |
1140 | if (err < 0) |
1141 | return err; | |
1142 | } | |
1143 | if (runtime->oss.prepare) { | |
1144 | err = snd_pcm_oss_prepare(substream); | |
1145 | if (err < 0) | |
1146 | return err; | |
1147 | } | |
1148 | return 0; | |
1149 | } | |
1150 | ||
6ac77bc1 | 1151 | static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) |
1da177e4 | 1152 | { |
6ac77bc1 | 1153 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1154 | snd_pcm_uframes_t frames; |
1155 | int err = 0; | |
1156 | ||
1157 | while (1) { | |
1158 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); | |
1159 | if (err < 0) | |
1160 | break; | |
1161 | runtime = substream->runtime; | |
1162 | if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) | |
1163 | break; | |
1164 | /* in case of overrun, skip whole periods like OSS/Linux driver does */ | |
1165 | /* until avail(delay) <= buffer_size */ | |
1166 | frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; | |
1167 | frames /= runtime->period_size; | |
1168 | frames *= runtime->period_size; | |
1169 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); | |
1170 | if (err < 0) | |
1171 | break; | |
1172 | } | |
1173 | return err; | |
1174 | } | |
1175 | ||
6ac77bc1 | 1176 | snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
1da177e4 | 1177 | { |
6ac77bc1 | 1178 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1179 | int ret; |
1180 | while (1) { | |
1181 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || | |
1182 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1183 | #ifdef OSS_DEBUG | |
61efcee8 TI |
1184 | pcm_dbg(substream->pcm, |
1185 | "pcm_oss: write: recovering from %s\n", | |
1186 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1187 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
1188 | #endif |
1189 | ret = snd_pcm_oss_prepare(substream); | |
1190 | if (ret < 0) | |
1191 | break; | |
1192 | } | |
1193 | if (in_kernel) { | |
1194 | mm_segment_t fs; | |
1195 | fs = snd_enter_user(); | |
fea952e5 | 1196 | ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); |
1da177e4 LT |
1197 | snd_leave_user(fs); |
1198 | } else { | |
fea952e5 | 1199 | ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames); |
1da177e4 LT |
1200 | } |
1201 | if (ret != -EPIPE && ret != -ESTRPIPE) | |
1202 | break; | |
1203 | /* test, if we can't store new data, because the stream */ | |
1204 | /* has not been started */ | |
1205 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) | |
1206 | return -EAGAIN; | |
1207 | } | |
1208 | return ret; | |
1209 | } | |
1210 | ||
6ac77bc1 | 1211 | snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
1da177e4 | 1212 | { |
6ac77bc1 | 1213 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1214 | snd_pcm_sframes_t delay; |
1215 | int ret; | |
1216 | while (1) { | |
1217 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || | |
1218 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1219 | #ifdef OSS_DEBUG | |
61efcee8 TI |
1220 | pcm_dbg(substream->pcm, |
1221 | "pcm_oss: read: recovering from %s\n", | |
1222 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1223 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
1224 | #endif |
1225 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); | |
1226 | if (ret < 0) | |
1227 | break; | |
1228 | } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { | |
1229 | ret = snd_pcm_oss_prepare(substream); | |
1230 | if (ret < 0) | |
1231 | break; | |
1232 | } | |
1233 | ret = snd_pcm_oss_capture_position_fixup(substream, &delay); | |
1234 | if (ret < 0) | |
1235 | break; | |
1236 | if (in_kernel) { | |
1237 | mm_segment_t fs; | |
1238 | fs = snd_enter_user(); | |
fea952e5 | 1239 | ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); |
1da177e4 LT |
1240 | snd_leave_user(fs); |
1241 | } else { | |
fea952e5 | 1242 | ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames); |
1da177e4 LT |
1243 | } |
1244 | if (ret == -EPIPE) { | |
1245 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1246 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); | |
1247 | if (ret < 0) | |
1248 | break; | |
1249 | } | |
1250 | continue; | |
1251 | } | |
1252 | if (ret != -ESTRPIPE) | |
1253 | break; | |
1254 | } | |
1255 | return ret; | |
1256 | } | |
1257 | ||
6ac77bc1 | 1258 | snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) |
1da177e4 | 1259 | { |
6ac77bc1 | 1260 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1261 | int ret; |
1262 | while (1) { | |
1263 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || | |
1264 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1265 | #ifdef OSS_DEBUG | |
61efcee8 TI |
1266 | pcm_dbg(substream->pcm, |
1267 | "pcm_oss: writev: recovering from %s\n", | |
1268 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1269 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
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 | ||
6ac77bc1 | 1294 | snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) |
1da177e4 | 1295 | { |
6ac77bc1 | 1296 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
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 | |
61efcee8 TI |
1302 | pcm_dbg(substream->pcm, |
1303 | "pcm_oss: readv: recovering from %s\n", | |
1304 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1305 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
1306 | #endif |
1307 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); | |
1308 | if (ret < 0) | |
1309 | break; | |
1310 | } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { | |
1311 | ret = snd_pcm_oss_prepare(substream); | |
1312 | if (ret < 0) | |
1313 | break; | |
1314 | } | |
1315 | if (in_kernel) { | |
1316 | mm_segment_t fs; | |
1317 | fs = snd_enter_user(); | |
1318 | ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); | |
1319 | snd_leave_user(fs); | |
1320 | } else { | |
1321 | ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); | |
1322 | } | |
1323 | if (ret != -EPIPE && ret != -ESTRPIPE) | |
1324 | break; | |
1325 | } | |
1326 | return ret; | |
1327 | } | |
1328 | ||
6ac77bc1 | 1329 | static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) |
1da177e4 | 1330 | { |
6ac77bc1 | 1331 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1332 | snd_pcm_sframes_t frames, frames1; |
21a3479a | 1333 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 | 1334 | if (runtime->oss.plugin_first) { |
6ac77bc1 | 1335 | struct snd_pcm_plugin_channel *channels; |
1da177e4 LT |
1336 | size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; |
1337 | if (!in_kernel) { | |
fea952e5 | 1338 | if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) |
1da177e4 LT |
1339 | return -EFAULT; |
1340 | buf = runtime->oss.buffer; | |
1341 | } | |
1342 | frames = bytes / oss_frame_bytes; | |
1343 | frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); | |
1344 | if (frames1 < 0) | |
1345 | return frames1; | |
1346 | frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); | |
1347 | if (frames1 <= 0) | |
1348 | return frames1; | |
1349 | bytes = frames1 * oss_frame_bytes; | |
21a3479a JK |
1350 | } else |
1351 | #endif | |
1352 | { | |
1da177e4 LT |
1353 | frames = bytes_to_frames(runtime, bytes); |
1354 | frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); | |
1355 | if (frames1 <= 0) | |
1356 | return frames1; | |
1357 | bytes = frames_to_bytes(runtime, frames1); | |
1358 | } | |
1359 | return bytes; | |
1360 | } | |
1361 | ||
6ac77bc1 | 1362 | static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) |
1da177e4 LT |
1363 | { |
1364 | size_t xfer = 0; | |
1365 | ssize_t tmp; | |
6ac77bc1 | 1366 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1367 | |
9c323fcb | 1368 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
1369 | return -ENXIO; |
1370 | ||
1371 | if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) | |
1372 | return tmp; | |
e3a5d59a | 1373 | mutex_lock(&runtime->oss.params_lock); |
1da177e4 LT |
1374 | while (bytes > 0) { |
1375 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { | |
1376 | tmp = bytes; | |
1377 | if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) | |
1378 | tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; | |
1379 | if (tmp > 0) { | |
e3a5d59a TI |
1380 | if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { |
1381 | tmp = -EFAULT; | |
1382 | goto err; | |
1383 | } | |
1da177e4 LT |
1384 | } |
1385 | runtime->oss.buffer_used += tmp; | |
1386 | buf += tmp; | |
1387 | bytes -= tmp; | |
1388 | xfer += tmp; | |
060d77b9 | 1389 | if (substream->oss.setup.partialfrag || |
1da177e4 LT |
1390 | runtime->oss.buffer_used == runtime->oss.period_bytes) { |
1391 | tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, | |
1392 | runtime->oss.buffer_used - runtime->oss.period_ptr, 1); | |
1393 | if (tmp <= 0) | |
e3a5d59a | 1394 | goto err; |
1da177e4 LT |
1395 | runtime->oss.bytes += tmp; |
1396 | runtime->oss.period_ptr += tmp; | |
1397 | runtime->oss.period_ptr %= runtime->oss.period_bytes; | |
1398 | if (runtime->oss.period_ptr == 0 || | |
1399 | runtime->oss.period_ptr == runtime->oss.buffer_used) | |
1400 | runtime->oss.buffer_used = 0; | |
e3a5d59a TI |
1401 | else if ((substream->f_flags & O_NONBLOCK) != 0) { |
1402 | tmp = -EAGAIN; | |
1403 | goto err; | |
1404 | } | |
1da177e4 LT |
1405 | } |
1406 | } else { | |
4d23359b CL |
1407 | tmp = snd_pcm_oss_write2(substream, |
1408 | (const char __force *)buf, | |
1409 | runtime->oss.period_bytes, 0); | |
1da177e4 | 1410 | if (tmp <= 0) |
e3a5d59a | 1411 | goto err; |
1da177e4 LT |
1412 | runtime->oss.bytes += tmp; |
1413 | buf += tmp; | |
1414 | bytes -= tmp; | |
1415 | xfer += tmp; | |
0df63e44 | 1416 | if ((substream->f_flags & O_NONBLOCK) != 0 && |
1da177e4 LT |
1417 | tmp != runtime->oss.period_bytes) |
1418 | break; | |
1419 | } | |
1420 | } | |
e3a5d59a | 1421 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 | 1422 | return xfer; |
e3a5d59a TI |
1423 | |
1424 | err: | |
1425 | mutex_unlock(&runtime->oss.params_lock); | |
1426 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; | |
1da177e4 LT |
1427 | } |
1428 | ||
6ac77bc1 | 1429 | static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) |
1da177e4 | 1430 | { |
6ac77bc1 | 1431 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1432 | snd_pcm_sframes_t frames, frames1; |
21a3479a | 1433 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
fea952e5 | 1434 | char __user *final_dst = (char __force __user *)buf; |
1da177e4 | 1435 | if (runtime->oss.plugin_first) { |
6ac77bc1 | 1436 | struct snd_pcm_plugin_channel *channels; |
1da177e4 LT |
1437 | size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; |
1438 | if (!in_kernel) | |
1439 | buf = runtime->oss.buffer; | |
1440 | frames = bytes / oss_frame_bytes; | |
1441 | frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); | |
1442 | if (frames1 < 0) | |
1443 | return frames1; | |
1444 | frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); | |
1445 | if (frames1 <= 0) | |
1446 | return frames1; | |
1447 | bytes = frames1 * oss_frame_bytes; | |
1448 | if (!in_kernel && copy_to_user(final_dst, buf, bytes)) | |
1449 | return -EFAULT; | |
21a3479a JK |
1450 | } else |
1451 | #endif | |
1452 | { | |
1da177e4 LT |
1453 | frames = bytes_to_frames(runtime, bytes); |
1454 | frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); | |
1455 | if (frames1 <= 0) | |
1456 | return frames1; | |
1457 | bytes = frames_to_bytes(runtime, frames1); | |
1458 | } | |
1459 | return bytes; | |
1460 | } | |
1461 | ||
6ac77bc1 | 1462 | static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) |
1da177e4 LT |
1463 | { |
1464 | size_t xfer = 0; | |
1465 | ssize_t tmp; | |
6ac77bc1 | 1466 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1467 | |
9c323fcb | 1468 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
1469 | return -ENXIO; |
1470 | ||
1471 | if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) | |
1472 | return tmp; | |
e3a5d59a | 1473 | mutex_lock(&runtime->oss.params_lock); |
1da177e4 LT |
1474 | while (bytes > 0) { |
1475 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { | |
1476 | if (runtime->oss.buffer_used == 0) { | |
1477 | tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); | |
1478 | if (tmp <= 0) | |
e3a5d59a | 1479 | goto err; |
1da177e4 LT |
1480 | runtime->oss.bytes += tmp; |
1481 | runtime->oss.period_ptr = tmp; | |
1482 | runtime->oss.buffer_used = tmp; | |
1483 | } | |
1484 | tmp = bytes; | |
1485 | if ((size_t) tmp > runtime->oss.buffer_used) | |
1486 | tmp = runtime->oss.buffer_used; | |
e3a5d59a TI |
1487 | if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { |
1488 | tmp = -EFAULT; | |
1489 | goto err; | |
1490 | } | |
1da177e4 LT |
1491 | buf += tmp; |
1492 | bytes -= tmp; | |
1493 | xfer += tmp; | |
1494 | runtime->oss.buffer_used -= tmp; | |
1495 | } else { | |
4d23359b CL |
1496 | tmp = snd_pcm_oss_read2(substream, (char __force *)buf, |
1497 | runtime->oss.period_bytes, 0); | |
1da177e4 | 1498 | if (tmp <= 0) |
e3a5d59a | 1499 | goto err; |
1da177e4 LT |
1500 | runtime->oss.bytes += tmp; |
1501 | buf += tmp; | |
1502 | bytes -= tmp; | |
1503 | xfer += tmp; | |
1504 | } | |
1505 | } | |
e3a5d59a | 1506 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 | 1507 | return xfer; |
e3a5d59a TI |
1508 | |
1509 | err: | |
1510 | mutex_unlock(&runtime->oss.params_lock); | |
1511 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; | |
1da177e4 LT |
1512 | } |
1513 | ||
6ac77bc1 | 1514 | static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1515 | { |
6ac77bc1 | 1516 | struct snd_pcm_substream *substream; |
60686aa0 TI |
1517 | struct snd_pcm_runtime *runtime; |
1518 | int i; | |
1da177e4 | 1519 | |
60686aa0 TI |
1520 | for (i = 0; i < 2; i++) { |
1521 | substream = pcm_oss_file->streams[i]; | |
1522 | if (!substream) | |
1523 | continue; | |
1524 | runtime = substream->runtime; | |
bf1bbb5a | 1525 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
60686aa0 TI |
1526 | runtime->oss.prepare = 1; |
1527 | runtime->oss.buffer_used = 0; | |
1528 | runtime->oss.prev_hw_ptr_period = 0; | |
1529 | runtime->oss.period_ptr = 0; | |
1da177e4 LT |
1530 | } |
1531 | return 0; | |
1532 | } | |
1533 | ||
6ac77bc1 | 1534 | static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1535 | { |
6ac77bc1 | 1536 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1537 | int err; |
1538 | ||
1539 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
1540 | if (substream != NULL) { | |
1541 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
1542 | return err; | |
bf1bbb5a | 1543 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); |
1da177e4 LT |
1544 | } |
1545 | /* note: all errors from the start action are ignored */ | |
1546 | /* OSS apps do not know, how to handle them */ | |
1547 | return 0; | |
1548 | } | |
1549 | ||
6ac77bc1 | 1550 | static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) |
1da177e4 | 1551 | { |
6ac77bc1 | 1552 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1553 | ssize_t result = 0; |
fea952e5 | 1554 | snd_pcm_state_t state; |
1da177e4 LT |
1555 | long res; |
1556 | wait_queue_t wait; | |
1557 | ||
1558 | runtime = substream->runtime; | |
1559 | init_waitqueue_entry(&wait, current); | |
1560 | add_wait_queue(&runtime->sleep, &wait); | |
1561 | #ifdef OSS_DEBUG | |
61efcee8 | 1562 | pcm_dbg(substream->pcm, "sync1: size = %li\n", size); |
1da177e4 LT |
1563 | #endif |
1564 | while (1) { | |
1565 | result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); | |
1566 | if (result > 0) { | |
1567 | runtime->oss.buffer_used = 0; | |
1568 | result = 0; | |
1569 | break; | |
1570 | } | |
1571 | if (result != 0 && result != -EAGAIN) | |
1572 | break; | |
1573 | result = 0; | |
1574 | set_current_state(TASK_INTERRUPTIBLE); | |
1575 | snd_pcm_stream_lock_irq(substream); | |
fea952e5 | 1576 | state = runtime->status->state; |
1da177e4 | 1577 | snd_pcm_stream_unlock_irq(substream); |
fea952e5 | 1578 | if (state != SNDRV_PCM_STATE_RUNNING) { |
1da177e4 LT |
1579 | set_current_state(TASK_RUNNING); |
1580 | break; | |
1581 | } | |
1582 | res = schedule_timeout(10 * HZ); | |
1583 | if (signal_pending(current)) { | |
1584 | result = -ERESTARTSYS; | |
1585 | break; | |
1586 | } | |
1587 | if (res == 0) { | |
61efcee8 TI |
1588 | pcm_err(substream->pcm, |
1589 | "OSS sync error - DMA timeout\n"); | |
1da177e4 LT |
1590 | result = -EIO; |
1591 | break; | |
1592 | } | |
1593 | } | |
1594 | remove_wait_queue(&runtime->sleep, &wait); | |
1595 | return result; | |
1596 | } | |
1597 | ||
6ac77bc1 | 1598 | static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 LT |
1599 | { |
1600 | int err = 0; | |
1601 | unsigned int saved_f_flags; | |
6ac77bc1 TI |
1602 | struct snd_pcm_substream *substream; |
1603 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
1604 | snd_pcm_format_t format; |
1605 | unsigned long width; | |
1606 | size_t size; | |
1607 | ||
1608 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
1609 | if (substream != NULL) { | |
1610 | runtime = substream->runtime; | |
9c323fcb | 1611 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
1612 | goto __direct; |
1613 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
1614 | return err; | |
1615 | format = snd_pcm_oss_format_from(runtime->oss.format); | |
1616 | width = snd_pcm_format_physical_width(format); | |
e3a5d59a | 1617 | mutex_lock(&runtime->oss.params_lock); |
1da177e4 LT |
1618 | if (runtime->oss.buffer_used > 0) { |
1619 | #ifdef OSS_DEBUG | |
61efcee8 | 1620 | pcm_dbg(substream->pcm, "sync: buffer_used\n"); |
1da177e4 LT |
1621 | #endif |
1622 | size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; | |
1623 | snd_pcm_format_set_silence(format, | |
1624 | runtime->oss.buffer + runtime->oss.buffer_used, | |
1625 | size); | |
1626 | err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); | |
e3a5d59a TI |
1627 | if (err < 0) { |
1628 | mutex_unlock(&runtime->oss.params_lock); | |
1da177e4 | 1629 | return err; |
e3a5d59a | 1630 | } |
1da177e4 LT |
1631 | } else if (runtime->oss.period_ptr > 0) { |
1632 | #ifdef OSS_DEBUG | |
61efcee8 | 1633 | pcm_dbg(substream->pcm, "sync: period_ptr\n"); |
1da177e4 LT |
1634 | #endif |
1635 | size = runtime->oss.period_bytes - runtime->oss.period_ptr; | |
1636 | snd_pcm_format_set_silence(format, | |
1637 | runtime->oss.buffer, | |
1638 | size * 8 / width); | |
1639 | err = snd_pcm_oss_sync1(substream, size); | |
e3a5d59a TI |
1640 | if (err < 0) { |
1641 | mutex_unlock(&runtime->oss.params_lock); | |
1da177e4 | 1642 | return err; |
e3a5d59a | 1643 | } |
1da177e4 LT |
1644 | } |
1645 | /* | |
1646 | * The ALSA's period might be a bit large than OSS one. | |
1647 | * Fill the remain portion of ALSA period with zeros. | |
1648 | */ | |
1649 | size = runtime->control->appl_ptr % runtime->period_size; | |
1650 | if (size > 0) { | |
1651 | size = runtime->period_size - size; | |
1652 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { | |
1653 | size = (runtime->frame_bits * size) / 8; | |
1654 | while (size > 0) { | |
1655 | mm_segment_t fs; | |
1656 | size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; | |
1657 | size -= size1; | |
1658 | size1 *= 8; | |
1659 | size1 /= runtime->sample_bits; | |
1660 | snd_pcm_format_set_silence(runtime->format, | |
1661 | runtime->oss.buffer, | |
1662 | size1); | |
4939c660 | 1663 | size1 /= runtime->channels; /* frames */ |
1da177e4 | 1664 | fs = snd_enter_user(); |
fea952e5 | 1665 | snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1); |
1da177e4 LT |
1666 | snd_leave_user(fs); |
1667 | } | |
1668 | } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { | |
1669 | void __user *buffers[runtime->channels]; | |
1670 | memset(buffers, 0, runtime->channels * sizeof(void *)); | |
1671 | snd_pcm_lib_writev(substream, buffers, size); | |
1672 | } | |
1673 | } | |
e3a5d59a | 1674 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 LT |
1675 | /* |
1676 | * finish sync: drain the buffer | |
1677 | */ | |
1678 | __direct: | |
0df63e44 TI |
1679 | saved_f_flags = substream->f_flags; |
1680 | substream->f_flags &= ~O_NONBLOCK; | |
bf1bbb5a | 1681 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
0df63e44 | 1682 | substream->f_flags = saved_f_flags; |
1da177e4 LT |
1683 | if (err < 0) |
1684 | return err; | |
1685 | runtime->oss.prepare = 1; | |
1686 | } | |
1687 | ||
1688 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
1689 | if (substream != NULL) { | |
1690 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
1691 | return err; | |
1692 | runtime = substream->runtime; | |
bf1bbb5a | 1693 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
1da177e4 LT |
1694 | if (err < 0) |
1695 | return err; | |
1696 | runtime->oss.buffer_used = 0; | |
1697 | runtime->oss.prepare = 1; | |
1698 | } | |
1699 | return 0; | |
1700 | } | |
1701 | ||
6ac77bc1 | 1702 | static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) |
1da177e4 LT |
1703 | { |
1704 | int idx; | |
1705 | ||
1706 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 TI |
1707 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1708 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
1709 | if (substream == NULL) |
1710 | continue; | |
1711 | runtime = substream->runtime; | |
1712 | if (rate < 1000) | |
1713 | rate = 1000; | |
1714 | else if (rate > 192000) | |
1715 | rate = 192000; | |
1716 | if (runtime->oss.rate != rate) { | |
1717 | runtime->oss.params = 1; | |
1718 | runtime->oss.rate = rate; | |
1719 | } | |
1720 | } | |
1721 | return snd_pcm_oss_get_rate(pcm_oss_file); | |
1722 | } | |
1723 | ||
6ac77bc1 | 1724 | static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1725 | { |
6ac77bc1 | 1726 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1727 | int err; |
1728 | ||
1729 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1730 | return err; | |
1731 | return substream->runtime->oss.rate; | |
1732 | } | |
1733 | ||
6ac77bc1 | 1734 | static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) |
1da177e4 LT |
1735 | { |
1736 | int idx; | |
1737 | if (channels < 1) | |
1738 | channels = 1; | |
1739 | if (channels > 128) | |
1740 | return -EINVAL; | |
1741 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 TI |
1742 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1743 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
1744 | if (substream == NULL) |
1745 | continue; | |
1746 | runtime = substream->runtime; | |
1747 | if (runtime->oss.channels != channels) { | |
1748 | runtime->oss.params = 1; | |
1749 | runtime->oss.channels = channels; | |
1750 | } | |
1751 | } | |
1752 | return snd_pcm_oss_get_channels(pcm_oss_file); | |
1753 | } | |
1754 | ||
6ac77bc1 | 1755 | static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1756 | { |
6ac77bc1 | 1757 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1758 | int err; |
1759 | ||
1760 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1761 | return err; | |
1762 | return substream->runtime->oss.channels; | |
1763 | } | |
1764 | ||
6ac77bc1 | 1765 | static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1766 | { |
6ac77bc1 | 1767 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1768 | int err; |
1769 | ||
1770 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1771 | return err; | |
1772 | return substream->runtime->oss.period_bytes; | |
1773 | } | |
1774 | ||
6ac77bc1 | 1775 | static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1776 | { |
6ac77bc1 | 1777 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1778 | int err; |
1779 | int direct; | |
6ac77bc1 | 1780 | struct snd_pcm_hw_params *params; |
1da177e4 | 1781 | unsigned int formats = 0; |
6ac77bc1 | 1782 | struct snd_mask format_mask; |
1da177e4 LT |
1783 | int fmt; |
1784 | ||
1785 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1786 | return err; | |
9c323fcb | 1787 | if (atomic_read(&substream->mmap_count)) |
1da177e4 | 1788 | direct = 1; |
060d77b9 TI |
1789 | else |
1790 | direct = substream->oss.setup.direct; | |
1da177e4 LT |
1791 | if (!direct) |
1792 | return AFMT_MU_LAW | AFMT_U8 | | |
1793 | AFMT_S16_LE | AFMT_S16_BE | | |
1794 | AFMT_S8 | AFMT_U16_LE | | |
24038a25 TI |
1795 | AFMT_U16_BE | |
1796 | AFMT_S32_LE | AFMT_S32_BE | | |
7924f0ca | 1797 | AFMT_S24_LE | AFMT_S24_BE | |
24038a25 | 1798 | AFMT_S24_PACKED; |
1da177e4 LT |
1799 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
1800 | if (!params) | |
1801 | return -ENOMEM; | |
1802 | _snd_pcm_hw_params_any(params); | |
1803 | err = snd_pcm_hw_refine(substream, params); | |
1804 | format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1805 | kfree(params); | |
7eaa943c TI |
1806 | if (err < 0) |
1807 | return err; | |
1da177e4 LT |
1808 | for (fmt = 0; fmt < 32; ++fmt) { |
1809 | if (snd_mask_test(&format_mask, fmt)) { | |
1810 | int f = snd_pcm_oss_format_to(fmt); | |
1811 | if (f >= 0) | |
1812 | formats |= f; | |
1813 | } | |
1814 | } | |
1815 | return formats; | |
1816 | } | |
1817 | ||
6ac77bc1 | 1818 | static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) |
1da177e4 LT |
1819 | { |
1820 | int formats, idx; | |
1821 | ||
1822 | if (format != AFMT_QUERY) { | |
1823 | formats = snd_pcm_oss_get_formats(pcm_oss_file); | |
5c59e09d SF |
1824 | if (formats < 0) |
1825 | return formats; | |
1da177e4 LT |
1826 | if (!(formats & format)) |
1827 | format = AFMT_U8; | |
1828 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 TI |
1829 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1830 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
1831 | if (substream == NULL) |
1832 | continue; | |
1833 | runtime = substream->runtime; | |
1834 | if (runtime->oss.format != format) { | |
1835 | runtime->oss.params = 1; | |
1836 | runtime->oss.format = format; | |
1837 | } | |
1838 | } | |
1839 | } | |
1840 | return snd_pcm_oss_get_format(pcm_oss_file); | |
1841 | } | |
1842 | ||
6ac77bc1 | 1843 | static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1844 | { |
6ac77bc1 | 1845 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1846 | int err; |
1847 | ||
1848 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1849 | return err; | |
1850 | return substream->runtime->oss.format; | |
1851 | } | |
1852 | ||
6ac77bc1 | 1853 | static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) |
1da177e4 | 1854 | { |
6ac77bc1 | 1855 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1856 | |
1857 | if (substream == NULL) | |
1858 | return 0; | |
1859 | runtime = substream->runtime; | |
1860 | if (subdivide == 0) { | |
1861 | subdivide = runtime->oss.subdivision; | |
1862 | if (subdivide == 0) | |
1863 | subdivide = 1; | |
1864 | return subdivide; | |
1865 | } | |
1866 | if (runtime->oss.subdivision || runtime->oss.fragshift) | |
1867 | return -EINVAL; | |
1868 | if (subdivide != 1 && subdivide != 2 && subdivide != 4 && | |
1869 | subdivide != 8 && subdivide != 16) | |
1870 | return -EINVAL; | |
1871 | runtime->oss.subdivision = subdivide; | |
1872 | runtime->oss.params = 1; | |
1873 | return subdivide; | |
1874 | } | |
1875 | ||
6ac77bc1 | 1876 | static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) |
1da177e4 LT |
1877 | { |
1878 | int err = -EINVAL, idx; | |
1879 | ||
1880 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 | 1881 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1da177e4 LT |
1882 | if (substream == NULL) |
1883 | continue; | |
1884 | if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) | |
1885 | return err; | |
1886 | } | |
1887 | return err; | |
1888 | } | |
1889 | ||
6ac77bc1 | 1890 | static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) |
1da177e4 | 1891 | { |
6ac77bc1 | 1892 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1893 | |
1894 | if (substream == NULL) | |
1895 | return 0; | |
1896 | runtime = substream->runtime; | |
1897 | if (runtime->oss.subdivision || runtime->oss.fragshift) | |
1898 | return -EINVAL; | |
1899 | runtime->oss.fragshift = val & 0xffff; | |
1900 | runtime->oss.maxfrags = (val >> 16) & 0xffff; | |
1901 | if (runtime->oss.fragshift < 4) /* < 16 */ | |
1902 | runtime->oss.fragshift = 4; | |
1903 | if (runtime->oss.maxfrags < 2) | |
1904 | runtime->oss.maxfrags = 2; | |
1905 | runtime->oss.params = 1; | |
1906 | return 0; | |
1907 | } | |
1908 | ||
6ac77bc1 | 1909 | static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) |
1da177e4 LT |
1910 | { |
1911 | int err = -EINVAL, idx; | |
1912 | ||
1913 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 | 1914 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1da177e4 LT |
1915 | if (substream == NULL) |
1916 | continue; | |
1917 | if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) | |
1918 | return err; | |
1919 | } | |
1920 | return err; | |
1921 | } | |
1922 | ||
1923 | static int snd_pcm_oss_nonblock(struct file * file) | |
1924 | { | |
db1dd4d3 | 1925 | spin_lock(&file->f_lock); |
1da177e4 | 1926 | file->f_flags |= O_NONBLOCK; |
db1dd4d3 | 1927 | spin_unlock(&file->f_lock); |
1da177e4 LT |
1928 | return 0; |
1929 | } | |
1930 | ||
6ac77bc1 | 1931 | static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) |
1da177e4 LT |
1932 | { |
1933 | ||
1934 | if (substream == NULL) { | |
1935 | res &= ~DSP_CAP_DUPLEX; | |
1936 | return res; | |
1937 | } | |
1938 | #ifdef DSP_CAP_MULTI | |
1939 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1940 | if (substream->pstr->substream_count > 1) | |
1941 | res |= DSP_CAP_MULTI; | |
1942 | #endif | |
1943 | /* DSP_CAP_REALTIME is set all times: */ | |
1944 | /* all ALSA drivers can return actual pointer in ring buffer */ | |
1945 | #if defined(DSP_CAP_REALTIME) && 0 | |
1946 | { | |
6ac77bc1 | 1947 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1948 | if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) |
1949 | res &= ~DSP_CAP_REALTIME; | |
1950 | } | |
1951 | #endif | |
1952 | return res; | |
1953 | } | |
1954 | ||
6ac77bc1 | 1955 | static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 LT |
1956 | { |
1957 | int result, idx; | |
1958 | ||
1959 | result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; | |
1960 | for (idx = 0; idx < 2; idx++) { | |
6ac77bc1 | 1961 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1da177e4 LT |
1962 | result = snd_pcm_oss_get_caps1(substream, result); |
1963 | } | |
1964 | result |= 0x0001; /* revision - same as SB AWE 64 */ | |
1965 | return result; | |
1966 | } | |
1967 | ||
f240406b JK |
1968 | static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, |
1969 | snd_pcm_uframes_t hw_ptr) | |
1da177e4 | 1970 | { |
6ac77bc1 | 1971 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1972 | snd_pcm_uframes_t appl_ptr; |
1973 | appl_ptr = hw_ptr + runtime->buffer_size; | |
1974 | appl_ptr %= runtime->boundary; | |
1975 | runtime->control->appl_ptr = appl_ptr; | |
1976 | } | |
1977 | ||
6ac77bc1 | 1978 | static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) |
1da177e4 | 1979 | { |
6ac77bc1 TI |
1980 | struct snd_pcm_runtime *runtime; |
1981 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; | |
1da177e4 LT |
1982 | int err, cmd; |
1983 | ||
1984 | #ifdef OSS_DEBUG | |
61efcee8 | 1985 | pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); |
1da177e4 LT |
1986 | #endif |
1987 | ||
1988 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
1989 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
1990 | ||
1991 | if (psubstream) { | |
1992 | if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) | |
1993 | return err; | |
1994 | } | |
1995 | if (csubstream) { | |
1996 | if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) | |
1997 | return err; | |
1998 | } | |
1999 | if (psubstream) { | |
2000 | runtime = psubstream->runtime; | |
2001 | if (trigger & PCM_ENABLE_OUTPUT) { | |
2002 | if (runtime->oss.trigger) | |
2003 | goto _skip1; | |
9c323fcb | 2004 | if (atomic_read(&psubstream->mmap_count)) |
f240406b JK |
2005 | snd_pcm_oss_simulate_fill(psubstream, |
2006 | get_hw_ptr_period(runtime)); | |
1da177e4 LT |
2007 | runtime->oss.trigger = 1; |
2008 | runtime->start_threshold = 1; | |
2009 | cmd = SNDRV_PCM_IOCTL_START; | |
2010 | } else { | |
2011 | if (!runtime->oss.trigger) | |
2012 | goto _skip1; | |
2013 | runtime->oss.trigger = 0; | |
2014 | runtime->start_threshold = runtime->boundary; | |
2015 | cmd = SNDRV_PCM_IOCTL_DROP; | |
2016 | runtime->oss.prepare = 1; | |
2017 | } | |
bf1bbb5a | 2018 | err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); |
1da177e4 LT |
2019 | if (err < 0) |
2020 | return err; | |
2021 | } | |
2022 | _skip1: | |
2023 | if (csubstream) { | |
2024 | runtime = csubstream->runtime; | |
2025 | if (trigger & PCM_ENABLE_INPUT) { | |
2026 | if (runtime->oss.trigger) | |
2027 | goto _skip2; | |
2028 | runtime->oss.trigger = 1; | |
2029 | runtime->start_threshold = 1; | |
2030 | cmd = SNDRV_PCM_IOCTL_START; | |
2031 | } else { | |
2032 | if (!runtime->oss.trigger) | |
2033 | goto _skip2; | |
2034 | runtime->oss.trigger = 0; | |
2035 | runtime->start_threshold = runtime->boundary; | |
2036 | cmd = SNDRV_PCM_IOCTL_DROP; | |
2037 | runtime->oss.prepare = 1; | |
2038 | } | |
bf1bbb5a | 2039 | err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); |
1da177e4 LT |
2040 | if (err < 0) |
2041 | return err; | |
2042 | } | |
2043 | _skip2: | |
2044 | return 0; | |
2045 | } | |
2046 | ||
6ac77bc1 | 2047 | static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 2048 | { |
6ac77bc1 | 2049 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
1da177e4 LT |
2050 | int result = 0; |
2051 | ||
2052 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2053 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2054 | if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) | |
2055 | result |= PCM_ENABLE_OUTPUT; | |
2056 | if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) | |
2057 | result |= PCM_ENABLE_INPUT; | |
2058 | return result; | |
2059 | } | |
2060 | ||
6ac77bc1 | 2061 | static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 2062 | { |
6ac77bc1 TI |
2063 | struct snd_pcm_substream *substream; |
2064 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2065 | snd_pcm_sframes_t delay; |
2066 | int err; | |
2067 | ||
2068 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2069 | if (substream == NULL) | |
2070 | return -EINVAL; | |
2071 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
2072 | return err; | |
2073 | runtime = substream->runtime; | |
2074 | if (runtime->oss.params || runtime->oss.prepare) | |
2075 | return 0; | |
bf1bbb5a | 2076 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); |
1da177e4 LT |
2077 | if (err == -EPIPE) |
2078 | delay = 0; /* hack for broken OSS applications */ | |
2079 | else if (err < 0) | |
2080 | return err; | |
2081 | return snd_pcm_oss_bytes(substream, delay); | |
2082 | } | |
2083 | ||
6ac77bc1 | 2084 | static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) |
1da177e4 | 2085 | { |
6ac77bc1 TI |
2086 | struct snd_pcm_substream *substream; |
2087 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2088 | snd_pcm_sframes_t delay; |
2089 | int fixup; | |
2090 | struct count_info info; | |
2091 | int err; | |
2092 | ||
2093 | if (_info == NULL) | |
2094 | return -EFAULT; | |
2095 | substream = pcm_oss_file->streams[stream]; | |
2096 | if (substream == NULL) | |
2097 | return -EINVAL; | |
2098 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
2099 | return err; | |
2100 | runtime = substream->runtime; | |
2101 | if (runtime->oss.params || runtime->oss.prepare) { | |
2102 | memset(&info, 0, sizeof(info)); | |
2103 | if (copy_to_user(_info, &info, sizeof(info))) | |
2104 | return -EFAULT; | |
2105 | return 0; | |
2106 | } | |
2107 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
2108 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); | |
2109 | if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { | |
2110 | err = 0; | |
2111 | delay = 0; | |
2112 | fixup = 0; | |
2113 | } else { | |
2114 | fixup = runtime->oss.buffer_used; | |
2115 | } | |
2116 | } else { | |
2117 | err = snd_pcm_oss_capture_position_fixup(substream, &delay); | |
2118 | fixup = -runtime->oss.buffer_used; | |
2119 | } | |
2120 | if (err < 0) | |
2121 | return err; | |
2122 | info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); | |
9c323fcb | 2123 | if (atomic_read(&substream->mmap_count)) { |
1da177e4 | 2124 | snd_pcm_sframes_t n; |
f240406b JK |
2125 | delay = get_hw_ptr_period(runtime); |
2126 | n = delay - runtime->oss.prev_hw_ptr_period; | |
1da177e4 LT |
2127 | if (n < 0) |
2128 | n += runtime->boundary; | |
2129 | info.blocks = n / runtime->period_size; | |
f240406b | 2130 | runtime->oss.prev_hw_ptr_period = delay; |
1da177e4 LT |
2131 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
2132 | snd_pcm_oss_simulate_fill(substream, delay); | |
2133 | info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; | |
2134 | } else { | |
5ac0fab9 | 2135 | delay = snd_pcm_oss_bytes(substream, delay); |
fb4bd0ad | 2136 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
060d77b9 | 2137 | if (substream->oss.setup.buggyptr) |
10f69f9e TI |
2138 | info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; |
2139 | else | |
2140 | info.blocks = (delay + fixup) / runtime->oss.period_bytes; | |
1da177e4 | 2141 | info.bytes = (runtime->oss.bytes - delay) & INT_MAX; |
fb4bd0ad | 2142 | } else { |
5ac0fab9 JK |
2143 | delay += fixup; |
2144 | info.blocks = delay / runtime->oss.period_bytes; | |
1da177e4 | 2145 | info.bytes = (runtime->oss.bytes + delay) & INT_MAX; |
fb4bd0ad | 2146 | } |
1da177e4 LT |
2147 | } |
2148 | if (copy_to_user(_info, &info, sizeof(info))) | |
2149 | return -EFAULT; | |
2150 | return 0; | |
2151 | } | |
2152 | ||
6ac77bc1 | 2153 | static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) |
1da177e4 | 2154 | { |
6ac77bc1 TI |
2155 | struct snd_pcm_substream *substream; |
2156 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2157 | snd_pcm_sframes_t avail; |
2158 | int fixup; | |
2159 | struct audio_buf_info info; | |
2160 | int err; | |
2161 | ||
2162 | if (_info == NULL) | |
2163 | return -EFAULT; | |
2164 | substream = pcm_oss_file->streams[stream]; | |
2165 | if (substream == NULL) | |
2166 | return -EINVAL; | |
2167 | runtime = substream->runtime; | |
2168 | ||
2169 | if (runtime->oss.params && | |
b2483716 | 2170 | (err = snd_pcm_oss_change_params(substream, false)) < 0) |
1da177e4 LT |
2171 | return err; |
2172 | ||
2173 | info.fragsize = runtime->oss.period_bytes; | |
2174 | info.fragstotal = runtime->periods; | |
2175 | if (runtime->oss.prepare) { | |
2176 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
2177 | info.bytes = runtime->oss.period_bytes * runtime->oss.periods; | |
2178 | info.fragments = runtime->oss.periods; | |
2179 | } else { | |
2180 | info.bytes = 0; | |
2181 | info.fragments = 0; | |
2182 | } | |
2183 | } else { | |
2184 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
2185 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); | |
2186 | if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { | |
2187 | avail = runtime->buffer_size; | |
2188 | err = 0; | |
2189 | fixup = 0; | |
2190 | } else { | |
2191 | avail = runtime->buffer_size - avail; | |
2192 | fixup = -runtime->oss.buffer_used; | |
2193 | } | |
2194 | } else { | |
2195 | err = snd_pcm_oss_capture_position_fixup(substream, &avail); | |
2196 | fixup = runtime->oss.buffer_used; | |
2197 | } | |
2198 | if (err < 0) | |
2199 | return err; | |
2200 | info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; | |
2201 | info.fragments = info.bytes / runtime->oss.period_bytes; | |
2202 | } | |
2203 | ||
2204 | #ifdef OSS_DEBUG | |
61efcee8 TI |
2205 | pcm_dbg(substream->pcm, |
2206 | "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", | |
2207 | info.bytes, info.fragments, info.fragstotal, info.fragsize); | |
1da177e4 LT |
2208 | #endif |
2209 | if (copy_to_user(_info, &info, sizeof(info))) | |
2210 | return -EFAULT; | |
2211 | return 0; | |
2212 | } | |
2213 | ||
6ac77bc1 | 2214 | static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) |
1da177e4 LT |
2215 | { |
2216 | // it won't be probably implemented | |
61efcee8 | 2217 | // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); |
1da177e4 LT |
2218 | return -EINVAL; |
2219 | } | |
2220 | ||
060d77b9 | 2221 | static const char *strip_task_path(const char *path) |
1da177e4 | 2222 | { |
060d77b9 TI |
2223 | const char *ptr, *ptrl = NULL; |
2224 | for (ptr = path; *ptr; ptr++) { | |
1da177e4 LT |
2225 | if (*ptr == '/') |
2226 | ptrl = ptr + 1; | |
1da177e4 | 2227 | } |
060d77b9 TI |
2228 | return ptrl; |
2229 | } | |
2230 | ||
2231 | static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, | |
2232 | const char *task_name, | |
2233 | struct snd_pcm_oss_setup *rsetup) | |
2234 | { | |
2235 | struct snd_pcm_oss_setup *setup; | |
2236 | ||
2237 | mutex_lock(&pcm->streams[stream].oss.setup_mutex); | |
2238 | do { | |
2239 | for (setup = pcm->streams[stream].oss.setup_list; setup; | |
2240 | setup = setup->next) { | |
2241 | if (!strcmp(setup->task_name, task_name)) | |
2242 | goto out; | |
1da177e4 | 2243 | } |
060d77b9 TI |
2244 | } while ((task_name = strip_task_path(task_name)) != NULL); |
2245 | out: | |
2246 | if (setup) | |
2247 | *rsetup = *setup; | |
1a60d4c5 | 2248 | mutex_unlock(&pcm->streams[stream].oss.setup_mutex); |
1da177e4 LT |
2249 | } |
2250 | ||
3bf75f9b TI |
2251 | static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) |
2252 | { | |
2253 | struct snd_pcm_runtime *runtime; | |
2254 | runtime = substream->runtime; | |
2255 | vfree(runtime->oss.buffer); | |
2256 | runtime->oss.buffer = NULL; | |
2257 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS | |
2258 | snd_pcm_oss_plugin_clear(substream); | |
2259 | #endif | |
2260 | substream->oss.oss = 0; | |
2261 | } | |
2262 | ||
6ac77bc1 TI |
2263 | static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, |
2264 | struct snd_pcm_oss_setup *setup, | |
1da177e4 LT |
2265 | int minor) |
2266 | { | |
6ac77bc1 | 2267 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2268 | |
2269 | substream->oss.oss = 1; | |
060d77b9 | 2270 | substream->oss.setup = *setup; |
3bf75f9b | 2271 | if (setup->nonblock) |
0df63e44 | 2272 | substream->f_flags |= O_NONBLOCK; |
1576274d | 2273 | else if (setup->block) |
0df63e44 | 2274 | substream->f_flags &= ~O_NONBLOCK; |
1da177e4 LT |
2275 | runtime = substream->runtime; |
2276 | runtime->oss.params = 1; | |
2277 | runtime->oss.trigger = 1; | |
2278 | runtime->oss.rate = 8000; | |
e3a5d59a | 2279 | mutex_init(&runtime->oss.params_lock); |
1da177e4 LT |
2280 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { |
2281 | case SNDRV_MINOR_OSS_PCM_8: | |
2282 | runtime->oss.format = AFMT_U8; | |
2283 | break; | |
2284 | case SNDRV_MINOR_OSS_PCM_16: | |
2285 | runtime->oss.format = AFMT_S16_LE; | |
2286 | break; | |
2287 | default: | |
2288 | runtime->oss.format = AFMT_MU_LAW; | |
2289 | } | |
2290 | runtime->oss.channels = 1; | |
2291 | runtime->oss.fragshift = 0; | |
2292 | runtime->oss.maxfrags = 0; | |
2293 | runtime->oss.subdivision = 0; | |
3bf75f9b | 2294 | substream->pcm_release = snd_pcm_oss_release_substream; |
1da177e4 LT |
2295 | } |
2296 | ||
6ac77bc1 | 2297 | static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 LT |
2298 | { |
2299 | int cidx; | |
7eaa943c TI |
2300 | if (!pcm_oss_file) |
2301 | return 0; | |
1da177e4 | 2302 | for (cidx = 0; cidx < 2; ++cidx) { |
6ac77bc1 | 2303 | struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; |
3bf75f9b TI |
2304 | if (substream) |
2305 | snd_pcm_release_substream(substream); | |
1da177e4 LT |
2306 | } |
2307 | kfree(pcm_oss_file); | |
2308 | return 0; | |
2309 | } | |
2310 | ||
2311 | static int snd_pcm_oss_open_file(struct file *file, | |
6ac77bc1 TI |
2312 | struct snd_pcm *pcm, |
2313 | struct snd_pcm_oss_file **rpcm_oss_file, | |
1da177e4 | 2314 | int minor, |
060d77b9 | 2315 | struct snd_pcm_oss_setup *setup) |
1da177e4 | 2316 | { |
3bf75f9b | 2317 | int idx, err; |
6ac77bc1 | 2318 | struct snd_pcm_oss_file *pcm_oss_file; |
3bf75f9b | 2319 | struct snd_pcm_substream *substream; |
aeb5d727 | 2320 | fmode_t f_mode = file->f_mode; |
1da177e4 | 2321 | |
7eaa943c TI |
2322 | if (rpcm_oss_file) |
2323 | *rpcm_oss_file = NULL; | |
1da177e4 | 2324 | |
ca2c0966 | 2325 | pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); |
1da177e4 LT |
2326 | if (pcm_oss_file == NULL) |
2327 | return -ENOMEM; | |
2328 | ||
2329 | if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && | |
2330 | (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) | |
2331 | f_mode = FMODE_WRITE; | |
3bf75f9b | 2332 | |
0df63e44 | 2333 | file->f_flags &= ~O_APPEND; |
3bf75f9b | 2334 | for (idx = 0; idx < 2; idx++) { |
060d77b9 | 2335 | if (setup[idx].disable) |
3bf75f9b | 2336 | continue; |
6cb53e7e TI |
2337 | if (! pcm->streams[idx].substream_count) |
2338 | continue; /* no matching substream */ | |
3bf75f9b TI |
2339 | if (idx == SNDRV_PCM_STREAM_PLAYBACK) { |
2340 | if (! (f_mode & FMODE_WRITE)) | |
2341 | continue; | |
2342 | } else { | |
2343 | if (! (f_mode & FMODE_READ)) | |
2344 | continue; | |
2345 | } | |
2346 | err = snd_pcm_open_substream(pcm, idx, file, &substream); | |
2347 | if (err < 0) { | |
1da177e4 LT |
2348 | snd_pcm_oss_release_file(pcm_oss_file); |
2349 | return err; | |
2350 | } | |
3bf75f9b TI |
2351 | |
2352 | pcm_oss_file->streams[idx] = substream; | |
1576274d | 2353 | substream->file = pcm_oss_file; |
060d77b9 | 2354 | snd_pcm_oss_init_substream(substream, &setup[idx], minor); |
1da177e4 LT |
2355 | } |
2356 | ||
bbdc1b7d | 2357 | if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { |
1da177e4 LT |
2358 | snd_pcm_oss_release_file(pcm_oss_file); |
2359 | return -EINVAL; | |
2360 | } | |
1da177e4 LT |
2361 | |
2362 | file->private_data = pcm_oss_file; | |
7eaa943c TI |
2363 | if (rpcm_oss_file) |
2364 | *rpcm_oss_file = pcm_oss_file; | |
1da177e4 LT |
2365 | return 0; |
2366 | } | |
2367 | ||
2368 | ||
93f2e378 TI |
2369 | static int snd_task_name(struct task_struct *task, char *name, size_t size) |
2370 | { | |
2371 | unsigned int idx; | |
2372 | ||
7eaa943c TI |
2373 | if (snd_BUG_ON(!task || !name || size < 2)) |
2374 | return -EINVAL; | |
93f2e378 TI |
2375 | for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) |
2376 | name[idx] = task->comm[idx]; | |
2377 | name[idx] = '\0'; | |
2378 | return 0; | |
2379 | } | |
2380 | ||
1da177e4 LT |
2381 | static int snd_pcm_oss_open(struct inode *inode, struct file *file) |
2382 | { | |
1da177e4 LT |
2383 | int err; |
2384 | char task_name[32]; | |
6ac77bc1 TI |
2385 | struct snd_pcm *pcm; |
2386 | struct snd_pcm_oss_file *pcm_oss_file; | |
060d77b9 | 2387 | struct snd_pcm_oss_setup setup[2]; |
1da177e4 LT |
2388 | int nonblock; |
2389 | wait_queue_t wait; | |
2390 | ||
02f4865f TI |
2391 | err = nonseekable_open(inode, file); |
2392 | if (err < 0) | |
2393 | return err; | |
2394 | ||
f87135f5 CL |
2395 | pcm = snd_lookup_oss_minor_data(iminor(inode), |
2396 | SNDRV_OSS_DEVICE_TYPE_PCM); | |
1da177e4 LT |
2397 | if (pcm == NULL) { |
2398 | err = -ENODEV; | |
2399 | goto __error1; | |
2400 | } | |
2401 | err = snd_card_file_add(pcm->card, file); | |
2402 | if (err < 0) | |
2403 | goto __error1; | |
2404 | if (!try_module_get(pcm->card->module)) { | |
2405 | err = -EFAULT; | |
2406 | goto __error2; | |
2407 | } | |
2408 | if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { | |
2409 | err = -EFAULT; | |
2410 | goto __error; | |
2411 | } | |
1576274d | 2412 | memset(setup, 0, sizeof(setup)); |
1da177e4 | 2413 | if (file->f_mode & FMODE_WRITE) |
060d77b9 TI |
2414 | snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
2415 | task_name, &setup[0]); | |
1da177e4 | 2416 | if (file->f_mode & FMODE_READ) |
060d77b9 TI |
2417 | snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, |
2418 | task_name, &setup[1]); | |
1da177e4 LT |
2419 | |
2420 | nonblock = !!(file->f_flags & O_NONBLOCK); | |
1da177e4 LT |
2421 | if (!nonblock) |
2422 | nonblock = nonblock_open; | |
2423 | ||
2424 | init_waitqueue_entry(&wait, current); | |
2425 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2426 | mutex_lock(&pcm->open_mutex); |
1da177e4 LT |
2427 | while (1) { |
2428 | err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, | |
3bf75f9b | 2429 | iminor(inode), setup); |
1da177e4 LT |
2430 | if (err >= 0) |
2431 | break; | |
2432 | if (err == -EAGAIN) { | |
2433 | if (nonblock) { | |
2434 | err = -EBUSY; | |
2435 | break; | |
2436 | } | |
2437 | } else | |
2438 | break; | |
2439 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2440 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2441 | schedule(); |
1a60d4c5 | 2442 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2443 | if (pcm->card->shutdown) { |
2444 | err = -ENODEV; | |
2445 | break; | |
2446 | } | |
1da177e4 LT |
2447 | if (signal_pending(current)) { |
2448 | err = -ERESTARTSYS; | |
2449 | break; | |
2450 | } | |
2451 | } | |
2452 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2453 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2454 | if (err < 0) |
2455 | goto __error; | |
8bb4d9ce | 2456 | snd_card_unref(pcm->card); |
1da177e4 LT |
2457 | return err; |
2458 | ||
2459 | __error: | |
2460 | module_put(pcm->card->module); | |
2461 | __error2: | |
2462 | snd_card_file_remove(pcm->card, file); | |
2463 | __error1: | |
a0830dbd TI |
2464 | if (pcm) |
2465 | snd_card_unref(pcm->card); | |
1da177e4 LT |
2466 | return err; |
2467 | } | |
2468 | ||
2469 | static int snd_pcm_oss_release(struct inode *inode, struct file *file) | |
2470 | { | |
6ac77bc1 TI |
2471 | struct snd_pcm *pcm; |
2472 | struct snd_pcm_substream *substream; | |
2473 | struct snd_pcm_oss_file *pcm_oss_file; | |
1da177e4 LT |
2474 | |
2475 | pcm_oss_file = file->private_data; | |
2476 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2477 | if (substream == NULL) | |
2478 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
7eaa943c TI |
2479 | if (snd_BUG_ON(!substream)) |
2480 | return -ENXIO; | |
1da177e4 | 2481 | pcm = substream->pcm; |
de1b8b93 TI |
2482 | if (!pcm->card->shutdown) |
2483 | snd_pcm_oss_sync(pcm_oss_file); | |
1a60d4c5 | 2484 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2485 | snd_pcm_oss_release_file(pcm_oss_file); |
1a60d4c5 | 2486 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2487 | wake_up(&pcm->open_wait); |
2488 | module_put(pcm->card->module); | |
2489 | snd_card_file_remove(pcm->card, file); | |
2490 | return 0; | |
2491 | } | |
2492 | ||
2493 | static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2494 | { | |
6ac77bc1 | 2495 | struct snd_pcm_oss_file *pcm_oss_file; |
1da177e4 LT |
2496 | int __user *p = (int __user *)arg; |
2497 | int res; | |
2498 | ||
2499 | pcm_oss_file = file->private_data; | |
2500 | if (cmd == OSS_GETVERSION) | |
2501 | return put_user(SNDRV_OSS_VERSION, p); | |
2502 | if (cmd == OSS_ALSAEMULVER) | |
2503 | return put_user(1, p); | |
2504 | #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) | |
2505 | if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ | |
6ac77bc1 | 2506 | struct snd_pcm_substream *substream; |
1da177e4 LT |
2507 | int idx; |
2508 | for (idx = 0; idx < 2; ++idx) { | |
2509 | substream = pcm_oss_file->streams[idx]; | |
2510 | if (substream != NULL) | |
2511 | break; | |
2512 | } | |
7eaa943c TI |
2513 | if (snd_BUG_ON(idx >= 2)) |
2514 | return -ENXIO; | |
1da177e4 LT |
2515 | return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); |
2516 | } | |
2517 | #endif | |
2518 | if (((cmd >> 8) & 0xff) != 'P') | |
2519 | return -EINVAL; | |
2520 | #ifdef OSS_DEBUG | |
61efcee8 | 2521 | pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); |
1da177e4 LT |
2522 | #endif |
2523 | switch (cmd) { | |
2524 | case SNDCTL_DSP_RESET: | |
2525 | return snd_pcm_oss_reset(pcm_oss_file); | |
2526 | case SNDCTL_DSP_SYNC: | |
2527 | return snd_pcm_oss_sync(pcm_oss_file); | |
2528 | case SNDCTL_DSP_SPEED: | |
2529 | if (get_user(res, p)) | |
2530 | return -EFAULT; | |
2531 | if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) | |
2532 | return res; | |
2533 | return put_user(res, p); | |
2534 | case SOUND_PCM_READ_RATE: | |
2535 | res = snd_pcm_oss_get_rate(pcm_oss_file); | |
2536 | if (res < 0) | |
2537 | return res; | |
2538 | return put_user(res, p); | |
2539 | case SNDCTL_DSP_STEREO: | |
2540 | if (get_user(res, p)) | |
2541 | return -EFAULT; | |
2542 | res = res > 0 ? 2 : 1; | |
2543 | if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) | |
2544 | return res; | |
2545 | return put_user(--res, p); | |
2546 | case SNDCTL_DSP_GETBLKSIZE: | |
2547 | res = snd_pcm_oss_get_block_size(pcm_oss_file); | |
2548 | if (res < 0) | |
2549 | return res; | |
2550 | return put_user(res, p); | |
2551 | case SNDCTL_DSP_SETFMT: | |
2552 | if (get_user(res, p)) | |
2553 | return -EFAULT; | |
2554 | res = snd_pcm_oss_set_format(pcm_oss_file, res); | |
2555 | if (res < 0) | |
2556 | return res; | |
2557 | return put_user(res, p); | |
2558 | case SOUND_PCM_READ_BITS: | |
2559 | res = snd_pcm_oss_get_format(pcm_oss_file); | |
2560 | if (res < 0) | |
2561 | return res; | |
2562 | return put_user(res, p); | |
2563 | case SNDCTL_DSP_CHANNELS: | |
2564 | if (get_user(res, p)) | |
2565 | return -EFAULT; | |
2566 | res = snd_pcm_oss_set_channels(pcm_oss_file, res); | |
2567 | if (res < 0) | |
2568 | return res; | |
2569 | return put_user(res, p); | |
2570 | case SOUND_PCM_READ_CHANNELS: | |
2571 | res = snd_pcm_oss_get_channels(pcm_oss_file); | |
2572 | if (res < 0) | |
2573 | return res; | |
2574 | return put_user(res, p); | |
2575 | case SOUND_PCM_WRITE_FILTER: | |
2576 | case SOUND_PCM_READ_FILTER: | |
2577 | return -EIO; | |
2578 | case SNDCTL_DSP_POST: | |
2579 | return snd_pcm_oss_post(pcm_oss_file); | |
2580 | case SNDCTL_DSP_SUBDIVIDE: | |
2581 | if (get_user(res, p)) | |
2582 | return -EFAULT; | |
2583 | res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); | |
2584 | if (res < 0) | |
2585 | return res; | |
2586 | return put_user(res, p); | |
2587 | case SNDCTL_DSP_SETFRAGMENT: | |
2588 | if (get_user(res, p)) | |
2589 | return -EFAULT; | |
2590 | return snd_pcm_oss_set_fragment(pcm_oss_file, res); | |
2591 | case SNDCTL_DSP_GETFMTS: | |
2592 | res = snd_pcm_oss_get_formats(pcm_oss_file); | |
2593 | if (res < 0) | |
2594 | return res; | |
2595 | return put_user(res, p); | |
2596 | case SNDCTL_DSP_GETOSPACE: | |
2597 | case SNDCTL_DSP_GETISPACE: | |
2598 | return snd_pcm_oss_get_space(pcm_oss_file, | |
2599 | cmd == SNDCTL_DSP_GETISPACE ? | |
2600 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, | |
2601 | (struct audio_buf_info __user *) arg); | |
2602 | case SNDCTL_DSP_NONBLOCK: | |
2603 | return snd_pcm_oss_nonblock(file); | |
2604 | case SNDCTL_DSP_GETCAPS: | |
2605 | res = snd_pcm_oss_get_caps(pcm_oss_file); | |
2606 | if (res < 0) | |
2607 | return res; | |
2608 | return put_user(res, p); | |
2609 | case SNDCTL_DSP_GETTRIGGER: | |
2610 | res = snd_pcm_oss_get_trigger(pcm_oss_file); | |
2611 | if (res < 0) | |
2612 | return res; | |
2613 | return put_user(res, p); | |
2614 | case SNDCTL_DSP_SETTRIGGER: | |
2615 | if (get_user(res, p)) | |
2616 | return -EFAULT; | |
2617 | return snd_pcm_oss_set_trigger(pcm_oss_file, res); | |
2618 | case SNDCTL_DSP_GETIPTR: | |
2619 | case SNDCTL_DSP_GETOPTR: | |
2620 | return snd_pcm_oss_get_ptr(pcm_oss_file, | |
2621 | cmd == SNDCTL_DSP_GETIPTR ? | |
2622 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, | |
2623 | (struct count_info __user *) arg); | |
2624 | case SNDCTL_DSP_MAPINBUF: | |
2625 | case SNDCTL_DSP_MAPOUTBUF: | |
2626 | return snd_pcm_oss_get_mapbuf(pcm_oss_file, | |
2627 | cmd == SNDCTL_DSP_MAPINBUF ? | |
2628 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, | |
2629 | (struct buffmem_desc __user *) arg); | |
2630 | case SNDCTL_DSP_SETSYNCRO: | |
2631 | /* stop DMA now.. */ | |
2632 | return 0; | |
2633 | case SNDCTL_DSP_SETDUPLEX: | |
2634 | if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) | |
2635 | return 0; | |
2636 | return -EIO; | |
2637 | case SNDCTL_DSP_GETODELAY: | |
2638 | res = snd_pcm_oss_get_odelay(pcm_oss_file); | |
2639 | if (res < 0) { | |
2640 | /* it's for sure, some broken apps don't check for error codes */ | |
2641 | put_user(0, p); | |
2642 | return res; | |
2643 | } | |
2644 | return put_user(res, p); | |
2645 | case SNDCTL_DSP_PROFILE: | |
2646 | return 0; /* silently ignore */ | |
2647 | default: | |
61efcee8 | 2648 | pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); |
1da177e4 LT |
2649 | } |
2650 | return -EINVAL; | |
2651 | } | |
2652 | ||
2653 | #ifdef CONFIG_COMPAT | |
2654 | /* all compatible */ | |
83266b6b TI |
2655 | static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, |
2656 | unsigned long arg) | |
2657 | { | |
2658 | return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); | |
2659 | } | |
1da177e4 LT |
2660 | #else |
2661 | #define snd_pcm_oss_ioctl_compat NULL | |
2662 | #endif | |
2663 | ||
2664 | static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) | |
2665 | { | |
6ac77bc1 TI |
2666 | struct snd_pcm_oss_file *pcm_oss_file; |
2667 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
2668 | |
2669 | pcm_oss_file = file->private_data; | |
2670 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2671 | if (substream == NULL) | |
2672 | return -ENXIO; | |
0df63e44 | 2673 | substream->f_flags = file->f_flags & O_NONBLOCK; |
1da177e4 LT |
2674 | #ifndef OSS_DEBUG |
2675 | return snd_pcm_oss_read1(substream, buf, count); | |
2676 | #else | |
2677 | { | |
2678 | ssize_t res = snd_pcm_oss_read1(substream, buf, count); | |
61efcee8 TI |
2679 | pcm_dbg(substream->pcm, |
2680 | "pcm_oss: read %li bytes (returned %li bytes)\n", | |
2681 | (long)count, (long)res); | |
1da177e4 LT |
2682 | return res; |
2683 | } | |
2684 | #endif | |
2685 | } | |
2686 | ||
2687 | static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) | |
2688 | { | |
6ac77bc1 TI |
2689 | struct snd_pcm_oss_file *pcm_oss_file; |
2690 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
2691 | long result; |
2692 | ||
2693 | pcm_oss_file = file->private_data; | |
2694 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2695 | if (substream == NULL) | |
2696 | return -ENXIO; | |
0df63e44 | 2697 | substream->f_flags = file->f_flags & O_NONBLOCK; |
1da177e4 | 2698 | result = snd_pcm_oss_write1(substream, buf, count); |
1da177e4 | 2699 | #ifdef OSS_DEBUG |
61efcee8 | 2700 | pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", |
006de267 | 2701 | (long)count, (long)result); |
1da177e4 LT |
2702 | #endif |
2703 | return result; | |
2704 | } | |
2705 | ||
6ac77bc1 | 2706 | static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 2707 | { |
6ac77bc1 | 2708 | struct snd_pcm_runtime *runtime = substream->runtime; |
9c323fcb | 2709 | if (atomic_read(&substream->mmap_count)) |
f240406b JK |
2710 | return runtime->oss.prev_hw_ptr_period != |
2711 | get_hw_ptr_period(runtime); | |
1da177e4 | 2712 | else |
f240406b JK |
2713 | return snd_pcm_playback_avail(runtime) >= |
2714 | runtime->oss.period_frames; | |
1da177e4 LT |
2715 | } |
2716 | ||
6ac77bc1 | 2717 | static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 2718 | { |
6ac77bc1 | 2719 | struct snd_pcm_runtime *runtime = substream->runtime; |
9c323fcb | 2720 | if (atomic_read(&substream->mmap_count)) |
f240406b JK |
2721 | return runtime->oss.prev_hw_ptr_period != |
2722 | get_hw_ptr_period(runtime); | |
1da177e4 | 2723 | else |
f240406b JK |
2724 | return snd_pcm_capture_avail(runtime) >= |
2725 | runtime->oss.period_frames; | |
1da177e4 LT |
2726 | } |
2727 | ||
2728 | static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) | |
2729 | { | |
6ac77bc1 | 2730 | struct snd_pcm_oss_file *pcm_oss_file; |
1da177e4 | 2731 | unsigned int mask; |
6ac77bc1 | 2732 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
1da177e4 LT |
2733 | |
2734 | pcm_oss_file = file->private_data; | |
2735 | ||
2736 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2737 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2738 | ||
2739 | mask = 0; | |
2740 | if (psubstream != NULL) { | |
6ac77bc1 | 2741 | struct snd_pcm_runtime *runtime = psubstream->runtime; |
1da177e4 LT |
2742 | poll_wait(file, &runtime->sleep, wait); |
2743 | snd_pcm_stream_lock_irq(psubstream); | |
2744 | if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && | |
2745 | (runtime->status->state != SNDRV_PCM_STATE_RUNNING || | |
2746 | snd_pcm_oss_playback_ready(psubstream))) | |
2747 | mask |= POLLOUT | POLLWRNORM; | |
2748 | snd_pcm_stream_unlock_irq(psubstream); | |
2749 | } | |
2750 | if (csubstream != NULL) { | |
6ac77bc1 TI |
2751 | struct snd_pcm_runtime *runtime = csubstream->runtime; |
2752 | snd_pcm_state_t ostate; | |
1da177e4 LT |
2753 | poll_wait(file, &runtime->sleep, wait); |
2754 | snd_pcm_stream_lock_irq(csubstream); | |
2755 | if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || | |
2756 | snd_pcm_oss_capture_ready(csubstream)) | |
2757 | mask |= POLLIN | POLLRDNORM; | |
2758 | snd_pcm_stream_unlock_irq(csubstream); | |
2759 | if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { | |
6ac77bc1 | 2760 | struct snd_pcm_oss_file ofile; |
1da177e4 LT |
2761 | memset(&ofile, 0, sizeof(ofile)); |
2762 | ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2763 | runtime->oss.trigger = 0; | |
2764 | snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); | |
2765 | } | |
2766 | } | |
2767 | ||
2768 | return mask; | |
2769 | } | |
2770 | ||
2771 | static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) | |
2772 | { | |
6ac77bc1 TI |
2773 | struct snd_pcm_oss_file *pcm_oss_file; |
2774 | struct snd_pcm_substream *substream = NULL; | |
2775 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2776 | int err; |
2777 | ||
2778 | #ifdef OSS_DEBUG | |
61efcee8 | 2779 | pr_debug("pcm_oss: mmap begin\n"); |
1da177e4 LT |
2780 | #endif |
2781 | pcm_oss_file = file->private_data; | |
2782 | switch ((area->vm_flags & (VM_READ | VM_WRITE))) { | |
2783 | case VM_READ | VM_WRITE: | |
2784 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2785 | if (substream) | |
2786 | break; | |
2787 | /* Fall through */ | |
2788 | case VM_READ: | |
2789 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2790 | break; | |
2791 | case VM_WRITE: | |
2792 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2793 | break; | |
2794 | default: | |
2795 | return -EINVAL; | |
2796 | } | |
2797 | /* set VM_READ access as well to fix memset() routines that do | |
2798 | reads before writes (to improve performance) */ | |
2799 | area->vm_flags |= VM_READ; | |
2800 | if (substream == NULL) | |
2801 | return -ENXIO; | |
2802 | runtime = substream->runtime; | |
2803 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) | |
2804 | return -EIO; | |
2805 | if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2806 | runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2807 | else | |
2808 | return -EIO; | |
2809 | ||
2810 | if (runtime->oss.params) { | |
b2483716 TI |
2811 | /* use mutex_trylock() for params_lock for avoiding a deadlock |
2812 | * between mmap_sem and params_lock taken by | |
2813 | * copy_from/to_user() in snd_pcm_oss_write/read() | |
2814 | */ | |
2815 | err = snd_pcm_oss_change_params(substream, true); | |
2816 | if (err < 0) | |
1da177e4 LT |
2817 | return err; |
2818 | } | |
21a3479a | 2819 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 LT |
2820 | if (runtime->oss.plugin_first != NULL) |
2821 | return -EIO; | |
21a3479a | 2822 | #endif |
1da177e4 LT |
2823 | |
2824 | if (area->vm_pgoff != 0) | |
2825 | return -EINVAL; | |
2826 | ||
2827 | err = snd_pcm_mmap_data(substream, file, area); | |
2828 | if (err < 0) | |
2829 | return err; | |
2830 | runtime->oss.mmap_bytes = area->vm_end - area->vm_start; | |
2831 | runtime->silence_threshold = 0; | |
2832 | runtime->silence_size = 0; | |
2833 | #ifdef OSS_DEBUG | |
61efcee8 | 2834 | pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", |
006de267 | 2835 | runtime->oss.mmap_bytes); |
1da177e4 LT |
2836 | #endif |
2837 | /* In mmap mode we never stop */ | |
2838 | runtime->stop_threshold = runtime->boundary; | |
2839 | ||
2840 | return 0; | |
2841 | } | |
2842 | ||
b7d90a35 | 2843 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
1da177e4 LT |
2844 | /* |
2845 | * /proc interface | |
2846 | */ | |
2847 | ||
6ac77bc1 TI |
2848 | static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, |
2849 | struct snd_info_buffer *buffer) | |
1da177e4 | 2850 | { |
6ac77bc1 TI |
2851 | struct snd_pcm_str *pstr = entry->private_data; |
2852 | struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; | |
1a60d4c5 | 2853 | mutex_lock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2854 | while (setup) { |
2855 | snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", | |
2856 | setup->task_name, | |
2857 | setup->periods, | |
2858 | setup->period_size, | |
2859 | setup->disable ? " disable" : "", | |
2860 | setup->direct ? " direct" : "", | |
2861 | setup->block ? " block" : "", | |
2862 | setup->nonblock ? " non-block" : "", | |
2863 | setup->partialfrag ? " partial-frag" : "", | |
2864 | setup->nosilence ? " no-silence" : ""); | |
2865 | setup = setup->next; | |
2866 | } | |
1a60d4c5 | 2867 | mutex_unlock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2868 | } |
2869 | ||
6ac77bc1 | 2870 | static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) |
1da177e4 | 2871 | { |
6ac77bc1 | 2872 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 | 2873 | |
1da177e4 LT |
2874 | for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; |
2875 | setup; setup = setupn) { | |
2876 | setupn = setup->next; | |
2877 | kfree(setup->task_name); | |
2878 | kfree(setup); | |
2879 | } | |
2880 | pstr->oss.setup_list = NULL; | |
2881 | } | |
2882 | ||
6ac77bc1 TI |
2883 | static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, |
2884 | struct snd_info_buffer *buffer) | |
1da177e4 | 2885 | { |
6ac77bc1 | 2886 | struct snd_pcm_str *pstr = entry->private_data; |
4f7454a9 TI |
2887 | char line[128], str[32], task_name[32]; |
2888 | const char *ptr; | |
1da177e4 | 2889 | int idx1; |
6ac77bc1 | 2890 | struct snd_pcm_oss_setup *setup, *setup1, template; |
1da177e4 LT |
2891 | |
2892 | while (!snd_info_get_line(buffer, line, sizeof(line))) { | |
1a60d4c5 | 2893 | mutex_lock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2894 | memset(&template, 0, sizeof(template)); |
2895 | ptr = snd_info_get_str(task_name, line, sizeof(task_name)); | |
2896 | if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { | |
2897 | snd_pcm_oss_proc_free_setup_list(pstr); | |
1a60d4c5 | 2898 | mutex_unlock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2899 | continue; |
2900 | } | |
2901 | for (setup = pstr->oss.setup_list; setup; setup = setup->next) { | |
2902 | if (!strcmp(setup->task_name, task_name)) { | |
2903 | template = *setup; | |
2904 | break; | |
2905 | } | |
2906 | } | |
2907 | ptr = snd_info_get_str(str, ptr, sizeof(str)); | |
2908 | template.periods = simple_strtoul(str, NULL, 10); | |
2909 | ptr = snd_info_get_str(str, ptr, sizeof(str)); | |
2910 | template.period_size = simple_strtoul(str, NULL, 10); | |
2911 | for (idx1 = 31; idx1 >= 0; idx1--) | |
2912 | if (template.period_size & (1 << idx1)) | |
2913 | break; | |
2914 | for (idx1--; idx1 >= 0; idx1--) | |
2915 | template.period_size &= ~(1 << idx1); | |
2916 | do { | |
2917 | ptr = snd_info_get_str(str, ptr, sizeof(str)); | |
2918 | if (!strcmp(str, "disable")) { | |
2919 | template.disable = 1; | |
2920 | } else if (!strcmp(str, "direct")) { | |
2921 | template.direct = 1; | |
2922 | } else if (!strcmp(str, "block")) { | |
2923 | template.block = 1; | |
2924 | } else if (!strcmp(str, "non-block")) { | |
2925 | template.nonblock = 1; | |
2926 | } else if (!strcmp(str, "partial-frag")) { | |
2927 | template.partialfrag = 1; | |
2928 | } else if (!strcmp(str, "no-silence")) { | |
2929 | template.nosilence = 1; | |
10f69f9e TI |
2930 | } else if (!strcmp(str, "buggy-ptr")) { |
2931 | template.buggyptr = 1; | |
1da177e4 LT |
2932 | } |
2933 | } while (*str); | |
2934 | if (setup == NULL) { | |
060d77b9 TI |
2935 | setup = kmalloc(sizeof(*setup), GFP_KERNEL); |
2936 | if (! setup) { | |
2937 | buffer->error = -ENOMEM; | |
91054598 | 2938 | mutex_unlock(&pstr->oss.setup_mutex); |
060d77b9 TI |
2939 | return; |
2940 | } | |
2941 | if (pstr->oss.setup_list == NULL) | |
2942 | pstr->oss.setup_list = setup; | |
2943 | else { | |
2944 | for (setup1 = pstr->oss.setup_list; | |
2945 | setup1->next; setup1 = setup1->next); | |
2946 | setup1->next = setup; | |
2947 | } | |
2948 | template.task_name = kstrdup(task_name, GFP_KERNEL); | |
2949 | if (! template.task_name) { | |
2950 | kfree(setup); | |
1da177e4 | 2951 | buffer->error = -ENOMEM; |
91054598 | 2952 | mutex_unlock(&pstr->oss.setup_mutex); |
060d77b9 | 2953 | return; |
1da177e4 LT |
2954 | } |
2955 | } | |
060d77b9 | 2956 | *setup = template; |
1a60d4c5 | 2957 | mutex_unlock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2958 | } |
2959 | } | |
2960 | ||
6ac77bc1 | 2961 | static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) |
1da177e4 LT |
2962 | { |
2963 | int stream; | |
2964 | for (stream = 0; stream < 2; ++stream) { | |
6ac77bc1 TI |
2965 | struct snd_info_entry *entry; |
2966 | struct snd_pcm_str *pstr = &pcm->streams[stream]; | |
1da177e4 LT |
2967 | if (pstr->substream_count == 0) |
2968 | continue; | |
2969 | if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { | |
2970 | entry->content = SNDRV_INFO_CONTENT_TEXT; | |
2971 | entry->mode = S_IFREG | S_IRUGO | S_IWUSR; | |
1da177e4 | 2972 | entry->c.text.read = snd_pcm_oss_proc_read; |
1da177e4 LT |
2973 | entry->c.text.write = snd_pcm_oss_proc_write; |
2974 | entry->private_data = pstr; | |
2975 | if (snd_info_register(entry) < 0) { | |
2976 | snd_info_free_entry(entry); | |
2977 | entry = NULL; | |
2978 | } | |
2979 | } | |
2980 | pstr->oss.proc_entry = entry; | |
2981 | } | |
2982 | } | |
2983 | ||
6ac77bc1 | 2984 | static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) |
1da177e4 LT |
2985 | { |
2986 | int stream; | |
2987 | for (stream = 0; stream < 2; ++stream) { | |
6ac77bc1 | 2988 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
746d4a02 TI |
2989 | snd_info_free_entry(pstr->oss.proc_entry); |
2990 | pstr->oss.proc_entry = NULL; | |
2991 | snd_pcm_oss_proc_free_setup_list(pstr); | |
1da177e4 LT |
2992 | } |
2993 | } | |
b7d90a35 | 2994 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
04f141a8 TI |
2995 | #define snd_pcm_oss_proc_init(pcm) |
2996 | #define snd_pcm_oss_proc_done(pcm) | |
b7d90a35 | 2997 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
2998 | |
2999 | /* | |
3000 | * ENTRY functions | |
3001 | */ | |
3002 | ||
9c2e08c5 | 3003 | static const struct file_operations snd_pcm_oss_f_reg = |
1da177e4 LT |
3004 | { |
3005 | .owner = THIS_MODULE, | |
3006 | .read = snd_pcm_oss_read, | |
3007 | .write = snd_pcm_oss_write, | |
3008 | .open = snd_pcm_oss_open, | |
3009 | .release = snd_pcm_oss_release, | |
02f4865f | 3010 | .llseek = no_llseek, |
1da177e4 LT |
3011 | .poll = snd_pcm_oss_poll, |
3012 | .unlocked_ioctl = snd_pcm_oss_ioctl, | |
3013 | .compat_ioctl = snd_pcm_oss_ioctl_compat, | |
3014 | .mmap = snd_pcm_oss_mmap, | |
3015 | }; | |
3016 | ||
6ac77bc1 | 3017 | static void register_oss_dsp(struct snd_pcm *pcm, int index) |
1da177e4 | 3018 | { |
1da177e4 | 3019 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
2af677fc | 3020 | pcm->card, index, &snd_pcm_oss_f_reg, |
80d7d771 | 3021 | pcm) < 0) { |
61efcee8 | 3022 | pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", |
d3d579f8 | 3023 | pcm->card->number, pcm->device); |
1da177e4 LT |
3024 | } |
3025 | } | |
3026 | ||
6ac77bc1 | 3027 | static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) |
1da177e4 LT |
3028 | { |
3029 | pcm->oss.reg = 0; | |
896e6cc2 | 3030 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
1da177e4 LT |
3031 | char name[128]; |
3032 | int duplex; | |
3033 | register_oss_dsp(pcm, 0); | |
3034 | duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && | |
3035 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && | |
3036 | !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); | |
3037 | sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); | |
3038 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO | |
3039 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, | |
3040 | pcm->card->number, | |
3041 | name); | |
3042 | #endif | |
3043 | pcm->oss.reg++; | |
3044 | pcm->oss.reg_mask |= 1; | |
3045 | } | |
896e6cc2 | 3046 | if (adsp_map[pcm->card->number] == (int)pcm->device) { |
1da177e4 LT |
3047 | register_oss_dsp(pcm, 1); |
3048 | pcm->oss.reg++; | |
3049 | pcm->oss.reg_mask |= 2; | |
3050 | } | |
3051 | ||
3052 | if (pcm->oss.reg) | |
3053 | snd_pcm_oss_proc_init(pcm); | |
3054 | ||
3055 | return 0; | |
3056 | } | |
3057 | ||
6ac77bc1 | 3058 | static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) |
1da177e4 LT |
3059 | { |
3060 | if (pcm->oss.reg) { | |
3061 | if (pcm->oss.reg_mask & 1) { | |
3062 | pcm->oss.reg_mask &= ~1; | |
3063 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, | |
3064 | pcm->card, 0); | |
3065 | } | |
3066 | if (pcm->oss.reg_mask & 2) { | |
3067 | pcm->oss.reg_mask &= ~2; | |
3068 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, | |
3069 | pcm->card, 1); | |
3070 | } | |
896e6cc2 | 3071 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
1da177e4 LT |
3072 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO |
3073 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); | |
3074 | #endif | |
3075 | } | |
3076 | pcm->oss.reg = 0; | |
1da177e4 LT |
3077 | } |
3078 | return 0; | |
3079 | } | |
3080 | ||
c461482c TI |
3081 | static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) |
3082 | { | |
3083 | snd_pcm_oss_disconnect_minor(pcm); | |
3084 | snd_pcm_oss_proc_done(pcm); | |
3085 | return 0; | |
3086 | } | |
3087 | ||
6ac77bc1 | 3088 | static struct snd_pcm_notify snd_pcm_oss_notify = |
1da177e4 LT |
3089 | { |
3090 | .n_register = snd_pcm_oss_register_minor, | |
3091 | .n_disconnect = snd_pcm_oss_disconnect_minor, | |
3092 | .n_unregister = snd_pcm_oss_unregister_minor, | |
3093 | }; | |
3094 | ||
3095 | static int __init alsa_pcm_oss_init(void) | |
3096 | { | |
3097 | int i; | |
3098 | int err; | |
3099 | ||
3100 | /* check device map table */ | |
3101 | for (i = 0; i < SNDRV_CARDS; i++) { | |
896e6cc2 | 3102 | if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { |
61efcee8 | 3103 | pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", |
d3d579f8 | 3104 | i, dsp_map[i]); |
1da177e4 LT |
3105 | dsp_map[i] = 0; |
3106 | } | |
896e6cc2 | 3107 | if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { |
61efcee8 | 3108 | pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", |
d3d579f8 | 3109 | i, adsp_map[i]); |
1da177e4 LT |
3110 | adsp_map[i] = 1; |
3111 | } | |
3112 | } | |
3113 | if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) | |
3114 | return err; | |
3115 | return 0; | |
3116 | } | |
3117 | ||
3118 | static void __exit alsa_pcm_oss_exit(void) | |
3119 | { | |
3120 | snd_pcm_notify(&snd_pcm_oss_notify, 1); | |
3121 | } | |
3122 | ||
3123 | module_init(alsa_pcm_oss_init) | |
3124 | module_exit(alsa_pcm_oss_exit) |