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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 | 30 | #include <linux/slab.h> |
174cd4b1 | 31 | #include <linux/sched/signal.h> |
1da177e4 LT |
32 | #include <linux/time.h> |
33 | #include <linux/vmalloc.h> | |
65a77217 | 34 | #include <linux/module.h> |
3f7440a6 | 35 | #include <linux/math64.h> |
543537bd | 36 | #include <linux/string.h> |
83266b6b | 37 | #include <linux/compat.h> |
1da177e4 LT |
38 | #include <sound/core.h> |
39 | #include <sound/minors.h> | |
40 | #include <sound/pcm.h> | |
41 | #include <sound/pcm_params.h> | |
42 | #include "pcm_plugin.h" | |
43 | #include <sound/info.h> | |
44 | #include <linux/soundcard.h> | |
45 | #include <sound/initval.h> | |
fea952e5 | 46 | #include <sound/mixer_oss.h> |
1da177e4 LT |
47 | |
48 | #define OSS_ALSAEMULVER _SIOR ('M', 249, int) | |
49 | ||
6581f4e7 | 50 | static int dsp_map[SNDRV_CARDS]; |
1da177e4 | 51 | static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
a67ff6a5 | 52 | static bool nonblock_open = 1; |
1da177e4 | 53 | |
c1017a4c | 54 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
55 | MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); |
56 | MODULE_LICENSE("GPL"); | |
57 | module_param_array(dsp_map, int, NULL, 0444); | |
58 | MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); | |
59 | module_param_array(adsp_map, int, NULL, 0444); | |
60 | MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); | |
61 | module_param(nonblock_open, bool, 0644); | |
62 | MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); | |
63 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); | |
64 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); | |
65 | ||
6ac77bc1 TI |
66 | static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); |
67 | static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); | |
68 | static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); | |
1da177e4 | 69 | |
e88e8ae6 TI |
70 | /* |
71 | * helper functions to process hw_params | |
72 | */ | |
73 | static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) | |
74 | { | |
75 | int changed = 0; | |
76 | if (i->min < min) { | |
77 | i->min = min; | |
78 | i->openmin = openmin; | |
79 | changed = 1; | |
80 | } else if (i->min == min && !i->openmin && openmin) { | |
81 | i->openmin = 1; | |
82 | changed = 1; | |
83 | } | |
84 | if (i->integer) { | |
85 | if (i->openmin) { | |
86 | i->min++; | |
87 | i->openmin = 0; | |
88 | } | |
89 | } | |
90 | if (snd_interval_checkempty(i)) { | |
91 | snd_interval_none(i); | |
92 | return -EINVAL; | |
93 | } | |
94 | return changed; | |
95 | } | |
96 | ||
97 | static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) | |
98 | { | |
99 | int changed = 0; | |
100 | if (i->max > max) { | |
101 | i->max = max; | |
102 | i->openmax = openmax; | |
103 | changed = 1; | |
104 | } else if (i->max == max && !i->openmax && openmax) { | |
105 | i->openmax = 1; | |
106 | changed = 1; | |
107 | } | |
108 | if (i->integer) { | |
109 | if (i->openmax) { | |
110 | i->max--; | |
111 | i->openmax = 0; | |
112 | } | |
113 | } | |
114 | if (snd_interval_checkempty(i)) { | |
115 | snd_interval_none(i); | |
116 | return -EINVAL; | |
117 | } | |
118 | return changed; | |
119 | } | |
120 | ||
121 | static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) | |
122 | { | |
123 | struct snd_interval t; | |
124 | t.empty = 0; | |
125 | t.min = t.max = val; | |
126 | t.openmin = t.openmax = 0; | |
127 | t.integer = 1; | |
128 | return snd_interval_refine(i, &t); | |
129 | } | |
130 | ||
131 | /** | |
132 | * snd_pcm_hw_param_value_min | |
133 | * @params: the hw_params instance | |
134 | * @var: parameter to retrieve | |
135 | * @dir: pointer to the direction (-1,0,1) or NULL | |
136 | * | |
137 | * Return the minimum value for field PAR. | |
138 | */ | |
139 | static unsigned int | |
140 | snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, | |
141 | snd_pcm_hw_param_t var, int *dir) | |
142 | { | |
143 | if (hw_is_mask(var)) { | |
144 | if (dir) | |
145 | *dir = 0; | |
146 | return snd_mask_min(hw_param_mask_c(params, var)); | |
147 | } | |
148 | if (hw_is_interval(var)) { | |
149 | const struct snd_interval *i = hw_param_interval_c(params, var); | |
150 | if (dir) | |
151 | *dir = i->openmin; | |
152 | return snd_interval_min(i); | |
153 | } | |
154 | return -EINVAL; | |
155 | } | |
156 | ||
157 | /** | |
158 | * snd_pcm_hw_param_value_max | |
159 | * @params: the hw_params instance | |
160 | * @var: parameter to retrieve | |
161 | * @dir: pointer to the direction (-1,0,1) or NULL | |
162 | * | |
163 | * Return the maximum value for field PAR. | |
164 | */ | |
165 | static unsigned int | |
166 | snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, | |
167 | snd_pcm_hw_param_t var, int *dir) | |
168 | { | |
169 | if (hw_is_mask(var)) { | |
170 | if (dir) | |
171 | *dir = 0; | |
172 | return snd_mask_max(hw_param_mask_c(params, var)); | |
173 | } | |
174 | if (hw_is_interval(var)) { | |
175 | const struct snd_interval *i = hw_param_interval_c(params, var); | |
176 | if (dir) | |
177 | *dir = - (int) i->openmax; | |
178 | return snd_interval_max(i); | |
179 | } | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, | |
184 | snd_pcm_hw_param_t var, | |
185 | const struct snd_mask *val) | |
186 | { | |
187 | int changed; | |
188 | changed = snd_mask_refine(hw_param_mask(params, var), val); | |
7a0a8716 | 189 | if (changed > 0) { |
e88e8ae6 TI |
190 | params->cmask |= 1 << var; |
191 | params->rmask |= 1 << var; | |
192 | } | |
193 | return changed; | |
194 | } | |
195 | ||
196 | static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, | |
197 | struct snd_pcm_hw_params *params, | |
198 | snd_pcm_hw_param_t var, | |
199 | const struct snd_mask *val) | |
200 | { | |
201 | int changed = _snd_pcm_hw_param_mask(params, var, val); | |
202 | if (changed < 0) | |
203 | return changed; | |
204 | if (params->rmask) { | |
205 | int err = snd_pcm_hw_refine(pcm, params); | |
206 | if (err < 0) | |
207 | return err; | |
208 | } | |
209 | return 0; | |
210 | } | |
211 | ||
212 | static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, | |
213 | snd_pcm_hw_param_t var, unsigned int val, | |
214 | int dir) | |
215 | { | |
216 | int changed; | |
217 | int open = 0; | |
218 | if (dir) { | |
219 | if (dir > 0) { | |
220 | open = 1; | |
221 | } else if (dir < 0) { | |
222 | if (val > 0) { | |
223 | open = 1; | |
224 | val--; | |
225 | } | |
226 | } | |
227 | } | |
228 | if (hw_is_mask(var)) | |
229 | changed = snd_mask_refine_min(hw_param_mask(params, var), | |
230 | val + !!open); | |
231 | else if (hw_is_interval(var)) | |
232 | changed = snd_interval_refine_min(hw_param_interval(params, var), | |
233 | val, open); | |
234 | else | |
235 | return -EINVAL; | |
7a0a8716 | 236 | if (changed > 0) { |
e88e8ae6 TI |
237 | params->cmask |= 1 << var; |
238 | params->rmask |= 1 << var; | |
239 | } | |
240 | return changed; | |
241 | } | |
242 | ||
243 | /** | |
244 | * snd_pcm_hw_param_min | |
245 | * @pcm: PCM instance | |
246 | * @params: the hw_params instance | |
247 | * @var: parameter to retrieve | |
248 | * @val: minimal value | |
249 | * @dir: pointer to the direction (-1,0,1) or NULL | |
250 | * | |
251 | * Inside configuration space defined by PARAMS remove from PAR all | |
252 | * values < VAL. Reduce configuration space accordingly. | |
253 | * Return new minimum or -EINVAL if the configuration space is empty | |
254 | */ | |
255 | static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, | |
256 | struct snd_pcm_hw_params *params, | |
257 | snd_pcm_hw_param_t var, unsigned int val, | |
258 | int *dir) | |
259 | { | |
260 | int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); | |
261 | if (changed < 0) | |
262 | return changed; | |
263 | if (params->rmask) { | |
264 | int err = snd_pcm_hw_refine(pcm, params); | |
265 | if (err < 0) | |
266 | return err; | |
267 | } | |
268 | return snd_pcm_hw_param_value_min(params, var, dir); | |
269 | } | |
270 | ||
271 | static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, | |
272 | snd_pcm_hw_param_t var, unsigned int val, | |
273 | int dir) | |
274 | { | |
275 | int changed; | |
276 | int open = 0; | |
277 | if (dir) { | |
278 | if (dir < 0) { | |
279 | open = 1; | |
280 | } else if (dir > 0) { | |
281 | open = 1; | |
282 | val++; | |
283 | } | |
284 | } | |
285 | if (hw_is_mask(var)) { | |
286 | if (val == 0 && open) { | |
287 | snd_mask_none(hw_param_mask(params, var)); | |
288 | changed = -EINVAL; | |
289 | } else | |
290 | changed = snd_mask_refine_max(hw_param_mask(params, var), | |
291 | val - !!open); | |
292 | } else if (hw_is_interval(var)) | |
293 | changed = snd_interval_refine_max(hw_param_interval(params, var), | |
294 | val, open); | |
295 | else | |
296 | return -EINVAL; | |
7a0a8716 | 297 | if (changed > 0) { |
e88e8ae6 TI |
298 | params->cmask |= 1 << var; |
299 | params->rmask |= 1 << var; | |
300 | } | |
301 | return changed; | |
302 | } | |
303 | ||
304 | /** | |
305 | * snd_pcm_hw_param_max | |
306 | * @pcm: PCM instance | |
307 | * @params: the hw_params instance | |
308 | * @var: parameter to retrieve | |
309 | * @val: maximal value | |
310 | * @dir: pointer to the direction (-1,0,1) or NULL | |
311 | * | |
312 | * Inside configuration space defined by PARAMS remove from PAR all | |
313 | * values >= VAL + 1. Reduce configuration space accordingly. | |
314 | * Return new maximum or -EINVAL if the configuration space is empty | |
315 | */ | |
316 | static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, | |
317 | struct snd_pcm_hw_params *params, | |
318 | snd_pcm_hw_param_t var, unsigned int val, | |
319 | int *dir) | |
320 | { | |
321 | int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); | |
322 | if (changed < 0) | |
323 | return changed; | |
324 | if (params->rmask) { | |
325 | int err = snd_pcm_hw_refine(pcm, params); | |
326 | if (err < 0) | |
327 | return err; | |
328 | } | |
329 | return snd_pcm_hw_param_value_max(params, var, dir); | |
330 | } | |
331 | ||
332 | static int boundary_sub(int a, int adir, | |
333 | int b, int bdir, | |
334 | int *c, int *cdir) | |
335 | { | |
336 | adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); | |
337 | bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); | |
338 | *c = a - b; | |
339 | *cdir = adir - bdir; | |
340 | if (*cdir == -2) { | |
341 | (*c)--; | |
342 | } else if (*cdir == 2) { | |
343 | (*c)++; | |
344 | } | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static int boundary_lt(unsigned int a, int adir, | |
349 | unsigned int b, int bdir) | |
350 | { | |
351 | if (adir < 0) { | |
352 | a--; | |
353 | adir = 1; | |
354 | } else if (adir > 0) | |
355 | adir = 1; | |
356 | if (bdir < 0) { | |
357 | b--; | |
358 | bdir = 1; | |
359 | } else if (bdir > 0) | |
360 | bdir = 1; | |
361 | return a < b || (a == b && adir < bdir); | |
362 | } | |
363 | ||
364 | /* Return 1 if min is nearer to best than max */ | |
365 | static int boundary_nearer(int min, int mindir, | |
366 | int best, int bestdir, | |
367 | int max, int maxdir) | |
368 | { | |
369 | int dmin, dmindir; | |
370 | int dmax, dmaxdir; | |
371 | boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); | |
372 | boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); | |
373 | return boundary_lt(dmin, dmindir, dmax, dmaxdir); | |
374 | } | |
375 | ||
376 | /** | |
377 | * snd_pcm_hw_param_near | |
378 | * @pcm: PCM instance | |
379 | * @params: the hw_params instance | |
380 | * @var: parameter to retrieve | |
381 | * @best: value to set | |
382 | * @dir: pointer to the direction (-1,0,1) or NULL | |
383 | * | |
384 | * Inside configuration space defined by PARAMS set PAR to the available value | |
385 | * nearest to VAL. Reduce configuration space accordingly. | |
386 | * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, | |
387 | * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. | |
388 | * Return the value found. | |
389 | */ | |
390 | static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, | |
391 | struct snd_pcm_hw_params *params, | |
392 | snd_pcm_hw_param_t var, unsigned int best, | |
393 | int *dir) | |
394 | { | |
395 | struct snd_pcm_hw_params *save = NULL; | |
396 | int v; | |
397 | unsigned int saved_min; | |
398 | int last = 0; | |
399 | int min, max; | |
400 | int mindir, maxdir; | |
401 | int valdir = dir ? *dir : 0; | |
402 | /* FIXME */ | |
403 | if (best > INT_MAX) | |
404 | best = INT_MAX; | |
405 | min = max = best; | |
406 | mindir = maxdir = valdir; | |
407 | if (maxdir > 0) | |
408 | maxdir = 0; | |
409 | else if (maxdir == 0) | |
410 | maxdir = -1; | |
411 | else { | |
412 | maxdir = 1; | |
413 | max--; | |
414 | } | |
415 | save = kmalloc(sizeof(*save), GFP_KERNEL); | |
416 | if (save == NULL) | |
417 | return -ENOMEM; | |
418 | *save = *params; | |
419 | saved_min = min; | |
420 | min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); | |
421 | if (min >= 0) { | |
422 | struct snd_pcm_hw_params *params1; | |
423 | if (max < 0) | |
424 | goto _end; | |
425 | if ((unsigned int)min == saved_min && mindir == valdir) | |
426 | goto _end; | |
427 | params1 = kmalloc(sizeof(*params1), GFP_KERNEL); | |
428 | if (params1 == NULL) { | |
429 | kfree(save); | |
430 | return -ENOMEM; | |
431 | } | |
432 | *params1 = *save; | |
433 | max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); | |
434 | if (max < 0) { | |
435 | kfree(params1); | |
436 | goto _end; | |
437 | } | |
438 | if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { | |
439 | *params = *params1; | |
440 | last = 1; | |
441 | } | |
442 | kfree(params1); | |
443 | } else { | |
444 | *params = *save; | |
445 | max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); | |
3daa7ea6 JJ |
446 | if (max < 0) { |
447 | kfree(save); | |
7eaa943c | 448 | return max; |
3daa7ea6 | 449 | } |
e88e8ae6 TI |
450 | last = 1; |
451 | } | |
452 | _end: | |
453 | kfree(save); | |
454 | if (last) | |
455 | v = snd_pcm_hw_param_last(pcm, params, var, dir); | |
456 | else | |
457 | v = snd_pcm_hw_param_first(pcm, params, var, dir); | |
e88e8ae6 TI |
458 | return v; |
459 | } | |
460 | ||
461 | static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, | |
462 | snd_pcm_hw_param_t var, unsigned int val, | |
463 | int dir) | |
464 | { | |
465 | int changed; | |
466 | if (hw_is_mask(var)) { | |
467 | struct snd_mask *m = hw_param_mask(params, var); | |
468 | if (val == 0 && dir < 0) { | |
469 | changed = -EINVAL; | |
470 | snd_mask_none(m); | |
471 | } else { | |
472 | if (dir > 0) | |
473 | val++; | |
474 | else if (dir < 0) | |
475 | val--; | |
476 | changed = snd_mask_refine_set(hw_param_mask(params, var), val); | |
477 | } | |
478 | } else if (hw_is_interval(var)) { | |
479 | struct snd_interval *i = hw_param_interval(params, var); | |
480 | if (val == 0 && dir < 0) { | |
481 | changed = -EINVAL; | |
482 | snd_interval_none(i); | |
483 | } else if (dir == 0) | |
484 | changed = snd_interval_refine_set(i, val); | |
485 | else { | |
486 | struct snd_interval t; | |
487 | t.openmin = 1; | |
488 | t.openmax = 1; | |
489 | t.empty = 0; | |
490 | t.integer = 0; | |
491 | if (dir < 0) { | |
492 | t.min = val - 1; | |
493 | t.max = val; | |
494 | } else { | |
495 | t.min = val; | |
496 | t.max = val+1; | |
497 | } | |
498 | changed = snd_interval_refine(i, &t); | |
499 | } | |
500 | } else | |
501 | return -EINVAL; | |
7a0a8716 | 502 | if (changed > 0) { |
e88e8ae6 TI |
503 | params->cmask |= 1 << var; |
504 | params->rmask |= 1 << var; | |
505 | } | |
506 | return changed; | |
507 | } | |
508 | ||
509 | /** | |
510 | * snd_pcm_hw_param_set | |
511 | * @pcm: PCM instance | |
512 | * @params: the hw_params instance | |
513 | * @var: parameter to retrieve | |
514 | * @val: value to set | |
515 | * @dir: pointer to the direction (-1,0,1) or NULL | |
516 | * | |
517 | * Inside configuration space defined by PARAMS remove from PAR all | |
518 | * values != VAL. Reduce configuration space accordingly. | |
519 | * Return VAL or -EINVAL if the configuration space is empty | |
520 | */ | |
521 | static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, | |
522 | struct snd_pcm_hw_params *params, | |
523 | snd_pcm_hw_param_t var, unsigned int val, | |
524 | int dir) | |
525 | { | |
526 | int changed = _snd_pcm_hw_param_set(params, var, val, dir); | |
527 | if (changed < 0) | |
528 | return changed; | |
529 | if (params->rmask) { | |
530 | int err = snd_pcm_hw_refine(pcm, params); | |
531 | if (err < 0) | |
532 | return err; | |
533 | } | |
534 | return snd_pcm_hw_param_value(params, var, NULL); | |
535 | } | |
536 | ||
537 | static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, | |
538 | snd_pcm_hw_param_t var) | |
539 | { | |
540 | int changed; | |
541 | changed = snd_interval_setinteger(hw_param_interval(params, var)); | |
7a0a8716 | 542 | if (changed > 0) { |
e88e8ae6 TI |
543 | params->cmask |= 1 << var; |
544 | params->rmask |= 1 << var; | |
545 | } | |
546 | return changed; | |
547 | } | |
548 | ||
549 | /* | |
550 | * plugin | |
551 | */ | |
552 | ||
21a3479a | 553 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
6ac77bc1 | 554 | static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) |
1da177e4 | 555 | { |
6ac77bc1 TI |
556 | struct snd_pcm_runtime *runtime = substream->runtime; |
557 | struct snd_pcm_plugin *plugin, *next; | |
1da177e4 LT |
558 | |
559 | plugin = runtime->oss.plugin_first; | |
560 | while (plugin) { | |
561 | next = plugin->next; | |
562 | snd_pcm_plugin_free(plugin); | |
563 | plugin = next; | |
564 | } | |
565 | runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; | |
566 | return 0; | |
567 | } | |
568 | ||
6ac77bc1 | 569 | static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) |
1da177e4 | 570 | { |
6ac77bc1 | 571 | struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
1da177e4 LT |
572 | plugin->next = runtime->oss.plugin_first; |
573 | plugin->prev = NULL; | |
574 | if (runtime->oss.plugin_first) { | |
575 | runtime->oss.plugin_first->prev = plugin; | |
576 | runtime->oss.plugin_first = plugin; | |
577 | } else { | |
578 | runtime->oss.plugin_last = | |
579 | runtime->oss.plugin_first = plugin; | |
580 | } | |
581 | return 0; | |
582 | } | |
583 | ||
6ac77bc1 | 584 | int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) |
1da177e4 | 585 | { |
6ac77bc1 | 586 | struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
1da177e4 LT |
587 | plugin->next = NULL; |
588 | plugin->prev = runtime->oss.plugin_last; | |
589 | if (runtime->oss.plugin_last) { | |
590 | runtime->oss.plugin_last->next = plugin; | |
591 | runtime->oss.plugin_last = plugin; | |
592 | } else { | |
593 | runtime->oss.plugin_last = | |
594 | runtime->oss.plugin_first = plugin; | |
595 | } | |
596 | return 0; | |
597 | } | |
21a3479a | 598 | #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ |
1da177e4 | 599 | |
6ac77bc1 | 600 | static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) |
1da177e4 | 601 | { |
6ac77bc1 | 602 | struct snd_pcm_runtime *runtime = substream->runtime; |
af081613 | 603 | long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
bfc5bddb | 604 | long bytes = frames_to_bytes(runtime, frames); |
1da177e4 | 605 | if (buffer_size == runtime->oss.buffer_bytes) |
bfc5bddb | 606 | return bytes; |
cdc5c53f TI |
607 | #if BITS_PER_LONG >= 64 |
608 | return runtime->oss.buffer_bytes * bytes / buffer_size; | |
609 | #else | |
610 | { | |
611 | u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; | |
3f7440a6 | 612 | return div_u64(bsize, buffer_size); |
cdc5c53f TI |
613 | } |
614 | #endif | |
1da177e4 LT |
615 | } |
616 | ||
6ac77bc1 | 617 | static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) |
1da177e4 | 618 | { |
6ac77bc1 | 619 | struct snd_pcm_runtime *runtime = substream->runtime; |
af081613 | 620 | long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
1da177e4 LT |
621 | if (buffer_size == runtime->oss.buffer_bytes) |
622 | return bytes_to_frames(runtime, bytes); | |
623 | return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); | |
624 | } | |
625 | ||
f240406b JK |
626 | static inline |
627 | snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) | |
628 | { | |
e7636925 | 629 | return runtime->hw_ptr_interrupt; |
f240406b JK |
630 | } |
631 | ||
24038a25 TI |
632 | /* define extended formats in the recent OSS versions (if any) */ |
633 | /* linear formats */ | |
634 | #define AFMT_S32_LE 0x00001000 | |
635 | #define AFMT_S32_BE 0x00002000 | |
636 | #define AFMT_S24_LE 0x00008000 | |
637 | #define AFMT_S24_BE 0x00010000 | |
638 | #define AFMT_S24_PACKED 0x00040000 | |
639 | ||
640 | /* other supported formats */ | |
641 | #define AFMT_FLOAT 0x00004000 | |
642 | #define AFMT_SPDIF_RAW 0x00020000 | |
643 | ||
644 | /* unsupported formats */ | |
645 | #define AFMT_AC3 0x00000400 | |
646 | #define AFMT_VORBIS 0x00000800 | |
647 | ||
fea952e5 | 648 | static snd_pcm_format_t snd_pcm_oss_format_from(int format) |
1da177e4 LT |
649 | { |
650 | switch (format) { | |
651 | case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; | |
652 | case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; | |
653 | case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; | |
654 | case AFMT_U8: return SNDRV_PCM_FORMAT_U8; | |
655 | case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; | |
656 | case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; | |
657 | case AFMT_S8: return SNDRV_PCM_FORMAT_S8; | |
658 | case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; | |
659 | case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; | |
660 | case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; | |
24038a25 TI |
661 | case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; |
662 | case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; | |
663 | case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; | |
664 | case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; | |
665 | case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; | |
666 | case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; | |
667 | case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; | |
1da177e4 LT |
668 | default: return SNDRV_PCM_FORMAT_U8; |
669 | } | |
670 | } | |
671 | ||
fea952e5 | 672 | static int snd_pcm_oss_format_to(snd_pcm_format_t format) |
1da177e4 LT |
673 | { |
674 | switch (format) { | |
675 | case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; | |
676 | case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; | |
677 | case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; | |
678 | case SNDRV_PCM_FORMAT_U8: return AFMT_U8; | |
679 | case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; | |
680 | case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; | |
681 | case SNDRV_PCM_FORMAT_S8: return AFMT_S8; | |
682 | case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; | |
683 | case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; | |
684 | case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; | |
24038a25 TI |
685 | case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; |
686 | case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; | |
687 | case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; | |
688 | case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; | |
689 | case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; | |
690 | case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; | |
691 | case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; | |
1da177e4 LT |
692 | default: return -EINVAL; |
693 | } | |
694 | } | |
695 | ||
6ac77bc1 TI |
696 | static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, |
697 | struct snd_pcm_hw_params *oss_params, | |
698 | struct snd_pcm_hw_params *slave_params) | |
1da177e4 LT |
699 | { |
700 | size_t s; | |
701 | size_t oss_buffer_size, oss_period_size, oss_periods; | |
702 | size_t min_period_size, max_period_size; | |
6ac77bc1 | 703 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
704 | size_t oss_frame_size; |
705 | ||
706 | oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * | |
707 | params_channels(oss_params) / 8; | |
708 | ||
709 | oss_buffer_size = snd_pcm_plug_client_size(substream, | |
710 | snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; | |
f6dbe1be | 711 | oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); |
9c323fcb | 712 | if (atomic_read(&substream->mmap_count)) { |
1da177e4 LT |
713 | if (oss_buffer_size > runtime->oss.mmap_bytes) |
714 | oss_buffer_size = runtime->oss.mmap_bytes; | |
715 | } | |
716 | ||
060d77b9 TI |
717 | if (substream->oss.setup.period_size > 16) |
718 | oss_period_size = substream->oss.setup.period_size; | |
1da177e4 LT |
719 | else if (runtime->oss.fragshift) { |
720 | oss_period_size = 1 << runtime->oss.fragshift; | |
721 | if (oss_period_size > oss_buffer_size / 2) | |
722 | oss_period_size = oss_buffer_size / 2; | |
723 | } else { | |
724 | int sd; | |
725 | size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; | |
726 | ||
727 | oss_period_size = oss_buffer_size; | |
728 | do { | |
729 | oss_period_size /= 2; | |
730 | } while (oss_period_size > bytes_per_sec); | |
731 | if (runtime->oss.subdivision == 0) { | |
732 | sd = 4; | |
733 | if (oss_period_size / sd > 4096) | |
734 | sd *= 2; | |
735 | if (oss_period_size / sd < 4096) | |
736 | sd = 1; | |
737 | } else | |
738 | sd = runtime->oss.subdivision; | |
739 | oss_period_size /= sd; | |
740 | if (oss_period_size < 16) | |
741 | oss_period_size = 16; | |
742 | } | |
743 | ||
744 | min_period_size = snd_pcm_plug_client_size(substream, | |
745 | snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); | |
746 | min_period_size *= oss_frame_size; | |
f6dbe1be | 747 | min_period_size = roundup_pow_of_two(min_period_size); |
1da177e4 LT |
748 | if (oss_period_size < min_period_size) |
749 | oss_period_size = min_period_size; | |
750 | ||
751 | max_period_size = snd_pcm_plug_client_size(substream, | |
752 | snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); | |
753 | max_period_size *= oss_frame_size; | |
f6dbe1be | 754 | max_period_size = rounddown_pow_of_two(max_period_size); |
1da177e4 LT |
755 | if (oss_period_size > max_period_size) |
756 | oss_period_size = max_period_size; | |
757 | ||
758 | oss_periods = oss_buffer_size / oss_period_size; | |
759 | ||
060d77b9 TI |
760 | if (substream->oss.setup.periods > 1) |
761 | oss_periods = substream->oss.setup.periods; | |
1da177e4 LT |
762 | |
763 | s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); | |
764 | if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) | |
765 | s = runtime->oss.maxfrags; | |
766 | if (oss_periods > s) | |
767 | oss_periods = s; | |
768 | ||
769 | s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); | |
770 | if (s < 2) | |
771 | s = 2; | |
772 | if (oss_periods < s) | |
773 | oss_periods = s; | |
774 | ||
775 | while (oss_period_size * oss_periods > oss_buffer_size) | |
776 | oss_period_size /= 2; | |
777 | ||
7eaa943c TI |
778 | if (oss_period_size < 16) |
779 | return -EINVAL; | |
1da177e4 LT |
780 | runtime->oss.period_bytes = oss_period_size; |
781 | runtime->oss.period_frames = 1; | |
782 | runtime->oss.periods = oss_periods; | |
783 | return 0; | |
784 | } | |
785 | ||
6ac77bc1 TI |
786 | static int choose_rate(struct snd_pcm_substream *substream, |
787 | struct snd_pcm_hw_params *params, unsigned int best_rate) | |
1da177e4 | 788 | { |
b55f9fdc | 789 | const struct snd_interval *it; |
6ac77bc1 | 790 | struct snd_pcm_hw_params *save; |
1da177e4 LT |
791 | unsigned int rate, prev; |
792 | ||
793 | save = kmalloc(sizeof(*save), GFP_KERNEL); | |
794 | if (save == NULL) | |
795 | return -ENOMEM; | |
796 | *save = *params; | |
b55f9fdc | 797 | it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); |
1da177e4 LT |
798 | |
799 | /* try multiples of the best rate */ | |
800 | rate = best_rate; | |
801 | for (;;) { | |
802 | if (it->max < rate || (it->max == rate && it->openmax)) | |
803 | break; | |
804 | if (it->min < rate || (it->min == rate && !it->openmin)) { | |
805 | int ret; | |
806 | ret = snd_pcm_hw_param_set(substream, params, | |
807 | SNDRV_PCM_HW_PARAM_RATE, | |
808 | rate, 0); | |
809 | if (ret == (int)rate) { | |
810 | kfree(save); | |
811 | return rate; | |
812 | } | |
813 | *params = *save; | |
814 | } | |
815 | prev = rate; | |
816 | rate += best_rate; | |
817 | if (rate <= prev) | |
818 | break; | |
819 | } | |
820 | ||
821 | /* not found, use the nearest rate */ | |
822 | kfree(save); | |
823 | return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); | |
824 | } | |
825 | ||
f6d297df TI |
826 | /* parameter locking: returns immediately if tried during streaming */ |
827 | static int lock_params(struct snd_pcm_runtime *runtime) | |
828 | { | |
829 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) | |
830 | return -ERESTARTSYS; | |
831 | if (atomic_read(&runtime->oss.rw_ref)) { | |
832 | mutex_unlock(&runtime->oss.params_lock); | |
833 | return -EBUSY; | |
834 | } | |
835 | return 0; | |
836 | } | |
837 | ||
838 | static void unlock_params(struct snd_pcm_runtime *runtime) | |
839 | { | |
840 | mutex_unlock(&runtime->oss.params_lock); | |
841 | } | |
842 | ||
02a5d692 TI |
843 | /* call with params_lock held */ |
844 | static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) | |
1da177e4 | 845 | { |
6ac77bc1 TI |
846 | struct snd_pcm_runtime *runtime = substream->runtime; |
847 | struct snd_pcm_hw_params *params, *sparams; | |
848 | struct snd_pcm_sw_params *sw_params; | |
1da177e4 LT |
849 | ssize_t oss_buffer_size, oss_period_size; |
850 | size_t oss_frame_size; | |
851 | int err; | |
852 | int direct; | |
fea952e5 CL |
853 | snd_pcm_format_t format, sformat; |
854 | int n; | |
e76bf3c4 | 855 | const struct snd_mask *sformat_mask; |
6ac77bc1 | 856 | struct snd_mask mask; |
1da177e4 | 857 | |
02a5d692 TI |
858 | if (!runtime->oss.params) |
859 | return 0; | |
46325371 | 860 | sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); |
1da177e4 LT |
861 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
862 | sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); | |
863 | if (!sw_params || !params || !sparams) { | |
1da177e4 LT |
864 | err = -ENOMEM; |
865 | goto failure; | |
866 | } | |
867 | ||
9c323fcb | 868 | if (atomic_read(&substream->mmap_count)) |
1da177e4 | 869 | direct = 1; |
060d77b9 TI |
870 | else |
871 | direct = substream->oss.setup.direct; | |
1da177e4 LT |
872 | |
873 | _snd_pcm_hw_params_any(sparams); | |
874 | _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); | |
875 | _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); | |
876 | snd_mask_none(&mask); | |
9c323fcb | 877 | if (atomic_read(&substream->mmap_count)) |
fea952e5 | 878 | snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); |
1da177e4 | 879 | else { |
fea952e5 | 880 | snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
1da177e4 | 881 | if (!direct) |
fea952e5 | 882 | snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
1da177e4 LT |
883 | } |
884 | err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); | |
885 | if (err < 0) { | |
61efcee8 | 886 | pcm_dbg(substream->pcm, "No usable accesses\n"); |
1da177e4 LT |
887 | err = -EINVAL; |
888 | goto failure; | |
889 | } | |
890 | choose_rate(substream, sparams, runtime->oss.rate); | |
891 | snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); | |
892 | ||
893 | format = snd_pcm_oss_format_from(runtime->oss.format); | |
894 | ||
e76bf3c4 | 895 | sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); |
1da177e4 LT |
896 | if (direct) |
897 | sformat = format; | |
898 | else | |
e76bf3c4 | 899 | sformat = snd_pcm_plug_slave_format(format, sformat_mask); |
1da177e4 | 900 | |
fea952e5 | 901 | if ((__force int)sformat < 0 || |
e76bf3c4 | 902 | !snd_mask_test(sformat_mask, (__force int)sformat)) { |
fea952e5 CL |
903 | for (sformat = (__force snd_pcm_format_t)0; |
904 | (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; | |
905 | sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { | |
e76bf3c4 | 906 | if (snd_mask_test(sformat_mask, (__force int)sformat) && |
1da177e4 LT |
907 | snd_pcm_oss_format_to(sformat) >= 0) |
908 | break; | |
909 | } | |
fea952e5 | 910 | if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { |
61efcee8 | 911 | pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); |
1da177e4 LT |
912 | err = -EINVAL; |
913 | goto failure; | |
914 | } | |
915 | } | |
fea952e5 | 916 | err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); |
7eaa943c TI |
917 | if (err < 0) |
918 | goto failure; | |
1da177e4 LT |
919 | |
920 | if (direct) { | |
921 | memcpy(params, sparams, sizeof(*params)); | |
922 | } else { | |
923 | _snd_pcm_hw_params_any(params); | |
924 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, | |
fea952e5 | 925 | (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); |
1da177e4 | 926 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, |
fea952e5 | 927 | (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); |
1da177e4 LT |
928 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, |
929 | runtime->oss.channels, 0); | |
930 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, | |
931 | runtime->oss.rate, 0); | |
932 | pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", | |
933 | params_access(params), params_format(params), | |
934 | params_channels(params), params_rate(params)); | |
935 | } | |
936 | pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", | |
937 | params_access(sparams), params_format(sparams), | |
938 | params_channels(sparams), params_rate(sparams)); | |
939 | ||
940 | oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * | |
941 | params_channels(params) / 8; | |
942 | ||
ca0214ee TI |
943 | err = snd_pcm_oss_period_size(substream, params, sparams); |
944 | if (err < 0) | |
945 | goto failure; | |
946 | ||
947 | n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); | |
948 | err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); | |
949 | if (err < 0) | |
950 | goto failure; | |
951 | ||
952 | err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, | |
953 | runtime->oss.periods, NULL); | |
954 | if (err < 0) | |
955 | goto failure; | |
956 | ||
957 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); | |
958 | ||
959 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams); | |
960 | if (err < 0) { | |
961 | pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); | |
962 | goto failure; | |
963 | } | |
964 | ||
21a3479a | 965 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 LT |
966 | snd_pcm_oss_plugin_clear(substream); |
967 | if (!direct) { | |
968 | /* add necessary plugins */ | |
969 | snd_pcm_oss_plugin_clear(substream); | |
970 | if ((err = snd_pcm_plug_format_plugins(substream, | |
971 | params, | |
972 | sparams)) < 0) { | |
61efcee8 TI |
973 | pcm_dbg(substream->pcm, |
974 | "snd_pcm_plug_format_plugins failed: %i\n", err); | |
1da177e4 LT |
975 | snd_pcm_oss_plugin_clear(substream); |
976 | goto failure; | |
977 | } | |
978 | if (runtime->oss.plugin_first) { | |
6ac77bc1 | 979 | struct snd_pcm_plugin *plugin; |
1da177e4 | 980 | if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { |
61efcee8 TI |
981 | pcm_dbg(substream->pcm, |
982 | "snd_pcm_plugin_build_io failed: %i\n", err); | |
1da177e4 LT |
983 | snd_pcm_oss_plugin_clear(substream); |
984 | goto failure; | |
985 | } | |
986 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
987 | err = snd_pcm_plugin_append(plugin); | |
988 | } else { | |
989 | err = snd_pcm_plugin_insert(plugin); | |
990 | } | |
991 | if (err < 0) { | |
992 | snd_pcm_oss_plugin_clear(substream); | |
993 | goto failure; | |
994 | } | |
995 | } | |
996 | } | |
21a3479a | 997 | #endif |
1da177e4 | 998 | |
1da177e4 LT |
999 | if (runtime->oss.trigger) { |
1000 | sw_params->start_threshold = 1; | |
1001 | } else { | |
1002 | sw_params->start_threshold = runtime->boundary; | |
1003 | } | |
9c323fcb TI |
1004 | if (atomic_read(&substream->mmap_count) || |
1005 | substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
1da177e4 LT |
1006 | sw_params->stop_threshold = runtime->boundary; |
1007 | else | |
1008 | sw_params->stop_threshold = runtime->buffer_size; | |
1009 | sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
1010 | sw_params->period_step = 1; | |
004e6538 TI |
1011 | sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? |
1012 | 1 : runtime->period_size; | |
9c323fcb | 1013 | if (atomic_read(&substream->mmap_count) || |
060d77b9 | 1014 | substream->oss.setup.nosilence) { |
1da177e4 LT |
1015 | sw_params->silence_threshold = 0; |
1016 | sw_params->silence_size = 0; | |
1017 | } else { | |
1018 | snd_pcm_uframes_t frames; | |
1019 | frames = runtime->period_size + 16; | |
1020 | if (frames > runtime->buffer_size) | |
1021 | frames = runtime->buffer_size; | |
1022 | sw_params->silence_threshold = frames; | |
1023 | sw_params->silence_size = frames; | |
1024 | } | |
1025 | ||
1026 | if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { | |
61efcee8 | 1027 | pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); |
1da177e4 LT |
1028 | goto failure; |
1029 | } | |
1030 | ||
1031 | runtime->oss.periods = params_periods(sparams); | |
1032 | oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); | |
7eaa943c TI |
1033 | if (oss_period_size < 0) { |
1034 | err = -EINVAL; | |
1035 | goto failure; | |
1036 | } | |
21a3479a | 1037 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 LT |
1038 | if (runtime->oss.plugin_first) { |
1039 | err = snd_pcm_plug_alloc(substream, oss_period_size); | |
1040 | if (err < 0) | |
1041 | goto failure; | |
1042 | } | |
21a3479a | 1043 | #endif |
1da177e4 LT |
1044 | oss_period_size *= oss_frame_size; |
1045 | ||
1046 | oss_buffer_size = oss_period_size * runtime->oss.periods; | |
7eaa943c TI |
1047 | if (oss_buffer_size < 0) { |
1048 | err = -EINVAL; | |
1049 | goto failure; | |
1050 | } | |
1da177e4 LT |
1051 | |
1052 | runtime->oss.period_bytes = oss_period_size; | |
1053 | runtime->oss.buffer_bytes = oss_buffer_size; | |
1054 | ||
1055 | pdprintf("oss: period bytes = %i, buffer bytes = %i\n", | |
1056 | runtime->oss.period_bytes, | |
1057 | runtime->oss.buffer_bytes); | |
1058 | pdprintf("slave: period_size = %i, buffer_size = %i\n", | |
1059 | params_period_size(sparams), | |
1060 | params_buffer_size(sparams)); | |
1061 | ||
1062 | runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); | |
1063 | runtime->oss.channels = params_channels(params); | |
1064 | runtime->oss.rate = params_rate(params); | |
1065 | ||
65766ee0 TI |
1066 | kvfree(runtime->oss.buffer); |
1067 | runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL); | |
cbbb0570 RK |
1068 | if (!runtime->oss.buffer) { |
1069 | err = -ENOMEM; | |
1070 | goto failure; | |
1071 | } | |
1072 | ||
1073 | runtime->oss.params = 0; | |
1074 | runtime->oss.prepare = 1; | |
1da177e4 LT |
1075 | runtime->oss.buffer_used = 0; |
1076 | if (runtime->dma_area) | |
1077 | snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); | |
1078 | ||
1079 | runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); | |
1080 | ||
1081 | err = 0; | |
1082 | failure: | |
1083 | kfree(sw_params); | |
1084 | kfree(params); | |
1085 | kfree(sparams); | |
02a5d692 TI |
1086 | return err; |
1087 | } | |
1088 | ||
1089 | /* this one takes the lock by itself */ | |
1090 | static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, | |
1091 | bool trylock) | |
1092 | { | |
1093 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1094 | int err; | |
1095 | ||
1096 | if (trylock) { | |
1097 | if (!(mutex_trylock(&runtime->oss.params_lock))) | |
1098 | return -EAGAIN; | |
1099 | } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) | |
1100 | return -ERESTARTSYS; | |
1101 | ||
1102 | err = snd_pcm_oss_change_params_locked(substream); | |
e3a5d59a | 1103 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 LT |
1104 | return err; |
1105 | } | |
1106 | ||
6ac77bc1 | 1107 | static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) |
1da177e4 LT |
1108 | { |
1109 | int idx, err; | |
6ac77bc1 | 1110 | struct snd_pcm_substream *asubstream = NULL, *substream; |
1da177e4 LT |
1111 | |
1112 | for (idx = 0; idx < 2; idx++) { | |
1113 | substream = pcm_oss_file->streams[idx]; | |
1114 | if (substream == NULL) | |
1115 | continue; | |
1116 | if (asubstream == NULL) | |
1117 | asubstream = substream; | |
1118 | if (substream->runtime->oss.params) { | |
b2483716 | 1119 | err = snd_pcm_oss_change_params(substream, false); |
1da177e4 LT |
1120 | if (err < 0) |
1121 | return err; | |
1122 | } | |
1123 | } | |
7eaa943c TI |
1124 | if (!asubstream) |
1125 | return -EIO; | |
1da177e4 LT |
1126 | if (r_substream) |
1127 | *r_substream = asubstream; | |
1128 | return 0; | |
1129 | } | |
1130 | ||
02a5d692 | 1131 | /* call with params_lock held */ |
e15dc99d TI |
1132 | /* NOTE: this always call PREPARE unconditionally no matter whether |
1133 | * runtime->oss.prepare is set or not | |
1134 | */ | |
6ac77bc1 | 1135 | static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) |
1da177e4 LT |
1136 | { |
1137 | int err; | |
6ac77bc1 | 1138 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1139 | |
1140 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); | |
1141 | if (err < 0) { | |
61efcee8 TI |
1142 | pcm_dbg(substream->pcm, |
1143 | "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); | |
1da177e4 LT |
1144 | return err; |
1145 | } | |
1146 | runtime->oss.prepare = 0; | |
f240406b | 1147 | runtime->oss.prev_hw_ptr_period = 0; |
1da177e4 LT |
1148 | runtime->oss.period_ptr = 0; |
1149 | runtime->oss.buffer_used = 0; | |
1150 | ||
1151 | return 0; | |
1152 | } | |
1153 | ||
6ac77bc1 | 1154 | static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) |
1da177e4 | 1155 | { |
6ac77bc1 | 1156 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1157 | int err; |
1158 | ||
1da177e4 LT |
1159 | runtime = substream->runtime; |
1160 | if (runtime->oss.params) { | |
b2483716 | 1161 | err = snd_pcm_oss_change_params(substream, false); |
1da177e4 LT |
1162 | if (err < 0) |
1163 | return err; | |
1164 | } | |
02a5d692 TI |
1165 | if (runtime->oss.prepare) { |
1166 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) | |
1167 | return -ERESTARTSYS; | |
1168 | err = snd_pcm_oss_prepare(substream); | |
1169 | mutex_unlock(&runtime->oss.params_lock); | |
1170 | if (err < 0) | |
1171 | return err; | |
1172 | } | |
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | /* call with params_lock held */ | |
1177 | static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) | |
1178 | { | |
1179 | struct snd_pcm_runtime *runtime; | |
1180 | int err; | |
1181 | ||
1182 | runtime = substream->runtime; | |
1183 | if (runtime->oss.params) { | |
1184 | err = snd_pcm_oss_change_params_locked(substream); | |
1185 | if (err < 0) | |
1186 | return err; | |
1187 | } | |
1da177e4 LT |
1188 | if (runtime->oss.prepare) { |
1189 | err = snd_pcm_oss_prepare(substream); | |
1190 | if (err < 0) | |
1191 | return err; | |
1192 | } | |
1193 | return 0; | |
1194 | } | |
1195 | ||
6ac77bc1 | 1196 | static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) |
1da177e4 | 1197 | { |
6ac77bc1 | 1198 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1199 | snd_pcm_uframes_t frames; |
1200 | int err = 0; | |
1201 | ||
1202 | while (1) { | |
1203 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); | |
1204 | if (err < 0) | |
1205 | break; | |
1206 | runtime = substream->runtime; | |
1207 | if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) | |
1208 | break; | |
1209 | /* in case of overrun, skip whole periods like OSS/Linux driver does */ | |
1210 | /* until avail(delay) <= buffer_size */ | |
1211 | frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; | |
1212 | frames /= runtime->period_size; | |
1213 | frames *= runtime->period_size; | |
1214 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); | |
1215 | if (err < 0) | |
1216 | break; | |
1217 | } | |
1218 | return err; | |
1219 | } | |
1220 | ||
6ac77bc1 | 1221 | snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
1da177e4 | 1222 | { |
6ac77bc1 | 1223 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1224 | int ret; |
1225 | while (1) { | |
1226 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || | |
1227 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1228 | #ifdef OSS_DEBUG | |
61efcee8 TI |
1229 | pcm_dbg(substream->pcm, |
1230 | "pcm_oss: write: recovering from %s\n", | |
1231 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1232 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
1233 | #endif |
1234 | ret = snd_pcm_oss_prepare(substream); | |
1235 | if (ret < 0) | |
1236 | break; | |
1237 | } | |
13f72c8c TI |
1238 | ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, |
1239 | frames, in_kernel); | |
1da177e4 LT |
1240 | if (ret != -EPIPE && ret != -ESTRPIPE) |
1241 | break; | |
1242 | /* test, if we can't store new data, because the stream */ | |
1243 | /* has not been started */ | |
1244 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) | |
1245 | return -EAGAIN; | |
1246 | } | |
1247 | return ret; | |
1248 | } | |
1249 | ||
6ac77bc1 | 1250 | snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
1da177e4 | 1251 | { |
6ac77bc1 | 1252 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1253 | snd_pcm_sframes_t delay; |
1254 | int ret; | |
1255 | while (1) { | |
1256 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || | |
1257 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1258 | #ifdef OSS_DEBUG | |
61efcee8 TI |
1259 | pcm_dbg(substream->pcm, |
1260 | "pcm_oss: read: recovering from %s\n", | |
1261 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1262 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
1263 | #endif |
1264 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); | |
1265 | if (ret < 0) | |
1266 | break; | |
1267 | } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { | |
1268 | ret = snd_pcm_oss_prepare(substream); | |
1269 | if (ret < 0) | |
1270 | break; | |
1271 | } | |
1272 | ret = snd_pcm_oss_capture_position_fixup(substream, &delay); | |
1273 | if (ret < 0) | |
1274 | break; | |
13f72c8c TI |
1275 | ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, |
1276 | frames, in_kernel); | |
1da177e4 LT |
1277 | if (ret == -EPIPE) { |
1278 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1279 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); | |
1280 | if (ret < 0) | |
1281 | break; | |
1282 | } | |
1283 | continue; | |
1284 | } | |
1285 | if (ret != -ESTRPIPE) | |
1286 | break; | |
1287 | } | |
1288 | return ret; | |
1289 | } | |
1290 | ||
fed5794f TI |
1291 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1292 | snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) | |
1da177e4 | 1293 | { |
6ac77bc1 | 1294 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1295 | int ret; |
1296 | while (1) { | |
1297 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || | |
1298 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1299 | #ifdef OSS_DEBUG | |
61efcee8 TI |
1300 | pcm_dbg(substream->pcm, |
1301 | "pcm_oss: writev: recovering from %s\n", | |
1302 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1303 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
1304 | #endif |
1305 | ret = snd_pcm_oss_prepare(substream); | |
1306 | if (ret < 0) | |
1307 | break; | |
1308 | } | |
fed5794f | 1309 | ret = snd_pcm_kernel_writev(substream, bufs, frames); |
1da177e4 LT |
1310 | if (ret != -EPIPE && ret != -ESTRPIPE) |
1311 | break; | |
1312 | ||
1313 | /* test, if we can't store new data, because the stream */ | |
1314 | /* has not been started */ | |
1315 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) | |
1316 | return -EAGAIN; | |
1317 | } | |
1318 | return ret; | |
1319 | } | |
1320 | ||
fed5794f | 1321 | snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) |
1da177e4 | 1322 | { |
6ac77bc1 | 1323 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1324 | int ret; |
1325 | while (1) { | |
1326 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || | |
1327 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
1328 | #ifdef OSS_DEBUG | |
61efcee8 TI |
1329 | pcm_dbg(substream->pcm, |
1330 | "pcm_oss: readv: recovering from %s\n", | |
1331 | runtime->status->state == SNDRV_PCM_STATE_XRUN ? | |
1332 | "XRUN" : "SUSPEND"); | |
1da177e4 LT |
1333 | #endif |
1334 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); | |
1335 | if (ret < 0) | |
1336 | break; | |
1337 | } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { | |
1338 | ret = snd_pcm_oss_prepare(substream); | |
1339 | if (ret < 0) | |
1340 | break; | |
1341 | } | |
fed5794f | 1342 | ret = snd_pcm_kernel_readv(substream, bufs, frames); |
1da177e4 LT |
1343 | if (ret != -EPIPE && ret != -ESTRPIPE) |
1344 | break; | |
1345 | } | |
1346 | return ret; | |
1347 | } | |
fed5794f | 1348 | #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ |
1da177e4 | 1349 | |
6ac77bc1 | 1350 | static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) |
1da177e4 | 1351 | { |
6ac77bc1 | 1352 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1353 | snd_pcm_sframes_t frames, frames1; |
21a3479a | 1354 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 | 1355 | if (runtime->oss.plugin_first) { |
6ac77bc1 | 1356 | struct snd_pcm_plugin_channel *channels; |
1da177e4 LT |
1357 | size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; |
1358 | if (!in_kernel) { | |
fea952e5 | 1359 | if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) |
1da177e4 LT |
1360 | return -EFAULT; |
1361 | buf = runtime->oss.buffer; | |
1362 | } | |
1363 | frames = bytes / oss_frame_bytes; | |
1364 | frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); | |
1365 | if (frames1 < 0) | |
1366 | return frames1; | |
1367 | frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); | |
1368 | if (frames1 <= 0) | |
1369 | return frames1; | |
1370 | bytes = frames1 * oss_frame_bytes; | |
21a3479a JK |
1371 | } else |
1372 | #endif | |
1373 | { | |
1da177e4 LT |
1374 | frames = bytes_to_frames(runtime, bytes); |
1375 | frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); | |
1376 | if (frames1 <= 0) | |
1377 | return frames1; | |
1378 | bytes = frames_to_bytes(runtime, frames1); | |
1379 | } | |
1380 | return bytes; | |
1381 | } | |
1382 | ||
6ac77bc1 | 1383 | static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) |
1da177e4 LT |
1384 | { |
1385 | size_t xfer = 0; | |
5607dddb | 1386 | ssize_t tmp = 0; |
6ac77bc1 | 1387 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1388 | |
9c323fcb | 1389 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
1390 | return -ENXIO; |
1391 | ||
40cab6e8 | 1392 | atomic_inc(&runtime->oss.rw_ref); |
1da177e4 | 1393 | while (bytes > 0) { |
900498a3 TI |
1394 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
1395 | tmp = -ERESTARTSYS; | |
1396 | break; | |
1397 | } | |
02a5d692 TI |
1398 | tmp = snd_pcm_oss_make_ready_locked(substream); |
1399 | if (tmp < 0) | |
1400 | goto err; | |
1da177e4 LT |
1401 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
1402 | tmp = bytes; | |
1403 | if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) | |
1404 | tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; | |
1405 | if (tmp > 0) { | |
e3a5d59a TI |
1406 | if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { |
1407 | tmp = -EFAULT; | |
1408 | goto err; | |
1409 | } | |
1da177e4 LT |
1410 | } |
1411 | runtime->oss.buffer_used += tmp; | |
1412 | buf += tmp; | |
1413 | bytes -= tmp; | |
1414 | xfer += tmp; | |
060d77b9 | 1415 | if (substream->oss.setup.partialfrag || |
1da177e4 LT |
1416 | runtime->oss.buffer_used == runtime->oss.period_bytes) { |
1417 | tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, | |
1418 | runtime->oss.buffer_used - runtime->oss.period_ptr, 1); | |
1419 | if (tmp <= 0) | |
e3a5d59a | 1420 | goto err; |
1da177e4 LT |
1421 | runtime->oss.bytes += tmp; |
1422 | runtime->oss.period_ptr += tmp; | |
1423 | runtime->oss.period_ptr %= runtime->oss.period_bytes; | |
1424 | if (runtime->oss.period_ptr == 0 || | |
1425 | runtime->oss.period_ptr == runtime->oss.buffer_used) | |
1426 | runtime->oss.buffer_used = 0; | |
e3a5d59a TI |
1427 | else if ((substream->f_flags & O_NONBLOCK) != 0) { |
1428 | tmp = -EAGAIN; | |
1429 | goto err; | |
1430 | } | |
1da177e4 LT |
1431 | } |
1432 | } else { | |
4d23359b CL |
1433 | tmp = snd_pcm_oss_write2(substream, |
1434 | (const char __force *)buf, | |
1435 | runtime->oss.period_bytes, 0); | |
1da177e4 | 1436 | if (tmp <= 0) |
e3a5d59a | 1437 | goto err; |
1da177e4 LT |
1438 | runtime->oss.bytes += tmp; |
1439 | buf += tmp; | |
1440 | bytes -= tmp; | |
1441 | xfer += tmp; | |
0df63e44 | 1442 | if ((substream->f_flags & O_NONBLOCK) != 0 && |
1da177e4 | 1443 | tmp != runtime->oss.period_bytes) |
900498a3 | 1444 | tmp = -EAGAIN; |
1da177e4 | 1445 | } |
e3a5d59a | 1446 | err: |
900498a3 TI |
1447 | mutex_unlock(&runtime->oss.params_lock); |
1448 | if (tmp < 0) | |
1449 | break; | |
29159a4e TI |
1450 | if (signal_pending(current)) { |
1451 | tmp = -ERESTARTSYS; | |
900498a3 | 1452 | break; |
29159a4e | 1453 | } |
900498a3 | 1454 | tmp = 0; |
1da177e4 | 1455 | } |
40cab6e8 | 1456 | atomic_dec(&runtime->oss.rw_ref); |
e3a5d59a | 1457 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
1da177e4 LT |
1458 | } |
1459 | ||
6ac77bc1 | 1460 | static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) |
1da177e4 | 1461 | { |
6ac77bc1 | 1462 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1463 | snd_pcm_sframes_t frames, frames1; |
21a3479a | 1464 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
fea952e5 | 1465 | char __user *final_dst = (char __force __user *)buf; |
1da177e4 | 1466 | if (runtime->oss.plugin_first) { |
6ac77bc1 | 1467 | struct snd_pcm_plugin_channel *channels; |
1da177e4 LT |
1468 | size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; |
1469 | if (!in_kernel) | |
1470 | buf = runtime->oss.buffer; | |
1471 | frames = bytes / oss_frame_bytes; | |
1472 | frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); | |
1473 | if (frames1 < 0) | |
1474 | return frames1; | |
1475 | frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); | |
1476 | if (frames1 <= 0) | |
1477 | return frames1; | |
1478 | bytes = frames1 * oss_frame_bytes; | |
1479 | if (!in_kernel && copy_to_user(final_dst, buf, bytes)) | |
1480 | return -EFAULT; | |
21a3479a JK |
1481 | } else |
1482 | #endif | |
1483 | { | |
1da177e4 LT |
1484 | frames = bytes_to_frames(runtime, bytes); |
1485 | frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); | |
1486 | if (frames1 <= 0) | |
1487 | return frames1; | |
1488 | bytes = frames_to_bytes(runtime, frames1); | |
1489 | } | |
1490 | return bytes; | |
1491 | } | |
1492 | ||
6ac77bc1 | 1493 | static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) |
1da177e4 LT |
1494 | { |
1495 | size_t xfer = 0; | |
5607dddb | 1496 | ssize_t tmp = 0; |
6ac77bc1 | 1497 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1498 | |
9c323fcb | 1499 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
1500 | return -ENXIO; |
1501 | ||
40cab6e8 | 1502 | atomic_inc(&runtime->oss.rw_ref); |
1da177e4 | 1503 | while (bytes > 0) { |
900498a3 TI |
1504 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
1505 | tmp = -ERESTARTSYS; | |
1506 | break; | |
1507 | } | |
02a5d692 TI |
1508 | tmp = snd_pcm_oss_make_ready_locked(substream); |
1509 | if (tmp < 0) | |
1510 | goto err; | |
1da177e4 LT |
1511 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
1512 | if (runtime->oss.buffer_used == 0) { | |
1513 | tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); | |
1514 | if (tmp <= 0) | |
e3a5d59a | 1515 | goto err; |
1da177e4 LT |
1516 | runtime->oss.bytes += tmp; |
1517 | runtime->oss.period_ptr = tmp; | |
1518 | runtime->oss.buffer_used = tmp; | |
1519 | } | |
1520 | tmp = bytes; | |
1521 | if ((size_t) tmp > runtime->oss.buffer_used) | |
1522 | tmp = runtime->oss.buffer_used; | |
e3a5d59a TI |
1523 | if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { |
1524 | tmp = -EFAULT; | |
1525 | goto err; | |
1526 | } | |
1da177e4 LT |
1527 | buf += tmp; |
1528 | bytes -= tmp; | |
1529 | xfer += tmp; | |
1530 | runtime->oss.buffer_used -= tmp; | |
1531 | } else { | |
4d23359b CL |
1532 | tmp = snd_pcm_oss_read2(substream, (char __force *)buf, |
1533 | runtime->oss.period_bytes, 0); | |
1da177e4 | 1534 | if (tmp <= 0) |
e3a5d59a | 1535 | goto err; |
1da177e4 LT |
1536 | runtime->oss.bytes += tmp; |
1537 | buf += tmp; | |
1538 | bytes -= tmp; | |
1539 | xfer += tmp; | |
1540 | } | |
e3a5d59a | 1541 | err: |
900498a3 TI |
1542 | mutex_unlock(&runtime->oss.params_lock); |
1543 | if (tmp < 0) | |
1544 | break; | |
29159a4e TI |
1545 | if (signal_pending(current)) { |
1546 | tmp = -ERESTARTSYS; | |
900498a3 | 1547 | break; |
29159a4e | 1548 | } |
900498a3 | 1549 | tmp = 0; |
1da177e4 | 1550 | } |
40cab6e8 | 1551 | atomic_dec(&runtime->oss.rw_ref); |
e3a5d59a | 1552 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
1da177e4 LT |
1553 | } |
1554 | ||
6ac77bc1 | 1555 | static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1556 | { |
6ac77bc1 | 1557 | struct snd_pcm_substream *substream; |
60686aa0 TI |
1558 | struct snd_pcm_runtime *runtime; |
1559 | int i; | |
1da177e4 | 1560 | |
60686aa0 TI |
1561 | for (i = 0; i < 2; i++) { |
1562 | substream = pcm_oss_file->streams[i]; | |
1563 | if (!substream) | |
1564 | continue; | |
1565 | runtime = substream->runtime; | |
bf1bbb5a | 1566 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
02a5d692 | 1567 | mutex_lock(&runtime->oss.params_lock); |
60686aa0 TI |
1568 | runtime->oss.prepare = 1; |
1569 | runtime->oss.buffer_used = 0; | |
1570 | runtime->oss.prev_hw_ptr_period = 0; | |
1571 | runtime->oss.period_ptr = 0; | |
02a5d692 | 1572 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 LT |
1573 | } |
1574 | return 0; | |
1575 | } | |
1576 | ||
6ac77bc1 | 1577 | static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1578 | { |
6ac77bc1 | 1579 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1580 | int err; |
1581 | ||
1582 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
1583 | if (substream != NULL) { | |
1584 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
1585 | return err; | |
bf1bbb5a | 1586 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); |
1da177e4 LT |
1587 | } |
1588 | /* note: all errors from the start action are ignored */ | |
1589 | /* OSS apps do not know, how to handle them */ | |
1590 | return 0; | |
1591 | } | |
1592 | ||
6ac77bc1 | 1593 | static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) |
1da177e4 | 1594 | { |
6ac77bc1 | 1595 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1596 | ssize_t result = 0; |
fea952e5 | 1597 | snd_pcm_state_t state; |
1da177e4 | 1598 | long res; |
ac6424b9 | 1599 | wait_queue_entry_t wait; |
1da177e4 LT |
1600 | |
1601 | runtime = substream->runtime; | |
1602 | init_waitqueue_entry(&wait, current); | |
1603 | add_wait_queue(&runtime->sleep, &wait); | |
1604 | #ifdef OSS_DEBUG | |
61efcee8 | 1605 | pcm_dbg(substream->pcm, "sync1: size = %li\n", size); |
1da177e4 LT |
1606 | #endif |
1607 | while (1) { | |
1608 | result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); | |
1609 | if (result > 0) { | |
1610 | runtime->oss.buffer_used = 0; | |
1611 | result = 0; | |
1612 | break; | |
1613 | } | |
1614 | if (result != 0 && result != -EAGAIN) | |
1615 | break; | |
1616 | result = 0; | |
1617 | set_current_state(TASK_INTERRUPTIBLE); | |
1618 | snd_pcm_stream_lock_irq(substream); | |
fea952e5 | 1619 | state = runtime->status->state; |
1da177e4 | 1620 | snd_pcm_stream_unlock_irq(substream); |
fea952e5 | 1621 | if (state != SNDRV_PCM_STATE_RUNNING) { |
1da177e4 LT |
1622 | set_current_state(TASK_RUNNING); |
1623 | break; | |
1624 | } | |
1625 | res = schedule_timeout(10 * HZ); | |
1626 | if (signal_pending(current)) { | |
1627 | result = -ERESTARTSYS; | |
1628 | break; | |
1629 | } | |
1630 | if (res == 0) { | |
61efcee8 TI |
1631 | pcm_err(substream->pcm, |
1632 | "OSS sync error - DMA timeout\n"); | |
1da177e4 LT |
1633 | result = -EIO; |
1634 | break; | |
1635 | } | |
1636 | } | |
1637 | remove_wait_queue(&runtime->sleep, &wait); | |
1638 | return result; | |
1639 | } | |
1640 | ||
6ac77bc1 | 1641 | static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 LT |
1642 | { |
1643 | int err = 0; | |
1644 | unsigned int saved_f_flags; | |
6ac77bc1 TI |
1645 | struct snd_pcm_substream *substream; |
1646 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
1647 | snd_pcm_format_t format; |
1648 | unsigned long width; | |
1649 | size_t size; | |
1650 | ||
1651 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
1652 | if (substream != NULL) { | |
1653 | runtime = substream->runtime; | |
9c323fcb | 1654 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
1655 | goto __direct; |
1656 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
1657 | return err; | |
40cab6e8 TI |
1658 | atomic_inc(&runtime->oss.rw_ref); |
1659 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) { | |
1660 | atomic_dec(&runtime->oss.rw_ref); | |
02a5d692 | 1661 | return -ERESTARTSYS; |
40cab6e8 | 1662 | } |
1da177e4 LT |
1663 | format = snd_pcm_oss_format_from(runtime->oss.format); |
1664 | width = snd_pcm_format_physical_width(format); | |
1665 | if (runtime->oss.buffer_used > 0) { | |
1666 | #ifdef OSS_DEBUG | |
61efcee8 | 1667 | pcm_dbg(substream->pcm, "sync: buffer_used\n"); |
1da177e4 LT |
1668 | #endif |
1669 | size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; | |
1670 | snd_pcm_format_set_silence(format, | |
1671 | runtime->oss.buffer + runtime->oss.buffer_used, | |
1672 | size); | |
1673 | err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); | |
40cab6e8 TI |
1674 | if (err < 0) |
1675 | goto unlock; | |
1da177e4 LT |
1676 | } else if (runtime->oss.period_ptr > 0) { |
1677 | #ifdef OSS_DEBUG | |
61efcee8 | 1678 | pcm_dbg(substream->pcm, "sync: period_ptr\n"); |
1da177e4 LT |
1679 | #endif |
1680 | size = runtime->oss.period_bytes - runtime->oss.period_ptr; | |
1681 | snd_pcm_format_set_silence(format, | |
1682 | runtime->oss.buffer, | |
1683 | size * 8 / width); | |
1684 | err = snd_pcm_oss_sync1(substream, size); | |
40cab6e8 TI |
1685 | if (err < 0) |
1686 | goto unlock; | |
1da177e4 LT |
1687 | } |
1688 | /* | |
1689 | * The ALSA's period might be a bit large than OSS one. | |
1690 | * Fill the remain portion of ALSA period with zeros. | |
1691 | */ | |
1692 | size = runtime->control->appl_ptr % runtime->period_size; | |
1693 | if (size > 0) { | |
1694 | size = runtime->period_size - size; | |
13f72c8c TI |
1695 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
1696 | snd_pcm_lib_write(substream, NULL, size); | |
1697 | else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
1698 | snd_pcm_lib_writev(substream, NULL, size); | |
1da177e4 | 1699 | } |
40cab6e8 | 1700 | unlock: |
e3a5d59a | 1701 | mutex_unlock(&runtime->oss.params_lock); |
40cab6e8 TI |
1702 | atomic_dec(&runtime->oss.rw_ref); |
1703 | if (err < 0) | |
1704 | return err; | |
1da177e4 LT |
1705 | /* |
1706 | * finish sync: drain the buffer | |
1707 | */ | |
1708 | __direct: | |
0df63e44 TI |
1709 | saved_f_flags = substream->f_flags; |
1710 | substream->f_flags &= ~O_NONBLOCK; | |
bf1bbb5a | 1711 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
0df63e44 | 1712 | substream->f_flags = saved_f_flags; |
1da177e4 LT |
1713 | if (err < 0) |
1714 | return err; | |
02a5d692 | 1715 | mutex_lock(&runtime->oss.params_lock); |
1da177e4 | 1716 | runtime->oss.prepare = 1; |
02a5d692 | 1717 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 LT |
1718 | } |
1719 | ||
1720 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
1721 | if (substream != NULL) { | |
1722 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
1723 | return err; | |
1724 | runtime = substream->runtime; | |
bf1bbb5a | 1725 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
1da177e4 LT |
1726 | if (err < 0) |
1727 | return err; | |
02a5d692 | 1728 | mutex_lock(&runtime->oss.params_lock); |
1da177e4 LT |
1729 | runtime->oss.buffer_used = 0; |
1730 | runtime->oss.prepare = 1; | |
02a5d692 | 1731 | mutex_unlock(&runtime->oss.params_lock); |
1da177e4 LT |
1732 | } |
1733 | return 0; | |
1734 | } | |
1735 | ||
6ac77bc1 | 1736 | static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) |
1da177e4 LT |
1737 | { |
1738 | int idx; | |
1739 | ||
1740 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 TI |
1741 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1742 | struct snd_pcm_runtime *runtime; | |
f6d297df TI |
1743 | int err; |
1744 | ||
1da177e4 LT |
1745 | if (substream == NULL) |
1746 | continue; | |
1747 | runtime = substream->runtime; | |
1748 | if (rate < 1000) | |
1749 | rate = 1000; | |
1750 | else if (rate > 192000) | |
1751 | rate = 192000; | |
f6d297df TI |
1752 | err = lock_params(runtime); |
1753 | if (err < 0) | |
1754 | return err; | |
1da177e4 LT |
1755 | if (runtime->oss.rate != rate) { |
1756 | runtime->oss.params = 1; | |
1757 | runtime->oss.rate = rate; | |
1758 | } | |
f6d297df | 1759 | unlock_params(runtime); |
1da177e4 LT |
1760 | } |
1761 | return snd_pcm_oss_get_rate(pcm_oss_file); | |
1762 | } | |
1763 | ||
6ac77bc1 | 1764 | static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1765 | { |
6ac77bc1 | 1766 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1767 | int err; |
1768 | ||
1769 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1770 | return err; | |
1771 | return substream->runtime->oss.rate; | |
1772 | } | |
1773 | ||
6ac77bc1 | 1774 | static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) |
1da177e4 LT |
1775 | { |
1776 | int idx; | |
1777 | if (channels < 1) | |
1778 | channels = 1; | |
1779 | if (channels > 128) | |
1780 | return -EINVAL; | |
1781 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 TI |
1782 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1783 | struct snd_pcm_runtime *runtime; | |
f6d297df TI |
1784 | int err; |
1785 | ||
1da177e4 LT |
1786 | if (substream == NULL) |
1787 | continue; | |
1788 | runtime = substream->runtime; | |
f6d297df TI |
1789 | err = lock_params(runtime); |
1790 | if (err < 0) | |
1791 | return err; | |
1da177e4 LT |
1792 | if (runtime->oss.channels != channels) { |
1793 | runtime->oss.params = 1; | |
1794 | runtime->oss.channels = channels; | |
1795 | } | |
f6d297df | 1796 | unlock_params(runtime); |
1da177e4 LT |
1797 | } |
1798 | return snd_pcm_oss_get_channels(pcm_oss_file); | |
1799 | } | |
1800 | ||
6ac77bc1 | 1801 | static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1802 | { |
6ac77bc1 | 1803 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1804 | int err; |
1805 | ||
1806 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1807 | return err; | |
1808 | return substream->runtime->oss.channels; | |
1809 | } | |
1810 | ||
6ac77bc1 | 1811 | static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1812 | { |
6ac77bc1 | 1813 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1814 | int err; |
1815 | ||
1816 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1817 | return err; | |
1818 | return substream->runtime->oss.period_bytes; | |
1819 | } | |
1820 | ||
6ac77bc1 | 1821 | static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1822 | { |
6ac77bc1 | 1823 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1824 | int err; |
1825 | int direct; | |
6ac77bc1 | 1826 | struct snd_pcm_hw_params *params; |
1da177e4 | 1827 | unsigned int formats = 0; |
e76bf3c4 | 1828 | const struct snd_mask *format_mask; |
1da177e4 LT |
1829 | int fmt; |
1830 | ||
1831 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1832 | return err; | |
9c323fcb | 1833 | if (atomic_read(&substream->mmap_count)) |
1da177e4 | 1834 | direct = 1; |
060d77b9 TI |
1835 | else |
1836 | direct = substream->oss.setup.direct; | |
1da177e4 LT |
1837 | if (!direct) |
1838 | return AFMT_MU_LAW | AFMT_U8 | | |
1839 | AFMT_S16_LE | AFMT_S16_BE | | |
1840 | AFMT_S8 | AFMT_U16_LE | | |
24038a25 TI |
1841 | AFMT_U16_BE | |
1842 | AFMT_S32_LE | AFMT_S32_BE | | |
7924f0ca | 1843 | AFMT_S24_LE | AFMT_S24_BE | |
24038a25 | 1844 | AFMT_S24_PACKED; |
1da177e4 LT |
1845 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
1846 | if (!params) | |
1847 | return -ENOMEM; | |
1848 | _snd_pcm_hw_params_any(params); | |
1849 | err = snd_pcm_hw_refine(substream, params); | |
7eaa943c | 1850 | if (err < 0) |
01c0b426 TI |
1851 | goto error; |
1852 | format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 | 1853 | for (fmt = 0; fmt < 32; ++fmt) { |
e76bf3c4 | 1854 | if (snd_mask_test(format_mask, fmt)) { |
f8b6c0cf | 1855 | int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); |
1da177e4 LT |
1856 | if (f >= 0) |
1857 | formats |= f; | |
1858 | } | |
1859 | } | |
01c0b426 TI |
1860 | |
1861 | error: | |
1862 | kfree(params); | |
1863 | return err < 0 ? err : formats; | |
1da177e4 LT |
1864 | } |
1865 | ||
6ac77bc1 | 1866 | static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) |
1da177e4 LT |
1867 | { |
1868 | int formats, idx; | |
f6d297df | 1869 | int err; |
1da177e4 LT |
1870 | |
1871 | if (format != AFMT_QUERY) { | |
1872 | formats = snd_pcm_oss_get_formats(pcm_oss_file); | |
5c59e09d SF |
1873 | if (formats < 0) |
1874 | return formats; | |
1da177e4 LT |
1875 | if (!(formats & format)) |
1876 | format = AFMT_U8; | |
1877 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 TI |
1878 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1879 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
1880 | if (substream == NULL) |
1881 | continue; | |
1882 | runtime = substream->runtime; | |
f6d297df TI |
1883 | err = lock_params(runtime); |
1884 | if (err < 0) | |
1885 | return err; | |
1da177e4 LT |
1886 | if (runtime->oss.format != format) { |
1887 | runtime->oss.params = 1; | |
1888 | runtime->oss.format = format; | |
1889 | } | |
f6d297df | 1890 | unlock_params(runtime); |
1da177e4 LT |
1891 | } |
1892 | } | |
1893 | return snd_pcm_oss_get_format(pcm_oss_file); | |
1894 | } | |
1895 | ||
6ac77bc1 | 1896 | static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 1897 | { |
6ac77bc1 | 1898 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1899 | int err; |
1900 | ||
1901 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) | |
1902 | return err; | |
1903 | return substream->runtime->oss.format; | |
1904 | } | |
1905 | ||
6ac77bc1 | 1906 | static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) |
1da177e4 | 1907 | { |
6ac77bc1 | 1908 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1909 | |
1da177e4 LT |
1910 | runtime = substream->runtime; |
1911 | if (subdivide == 0) { | |
1912 | subdivide = runtime->oss.subdivision; | |
1913 | if (subdivide == 0) | |
1914 | subdivide = 1; | |
1915 | return subdivide; | |
1916 | } | |
1917 | if (runtime->oss.subdivision || runtime->oss.fragshift) | |
1918 | return -EINVAL; | |
1919 | if (subdivide != 1 && subdivide != 2 && subdivide != 4 && | |
1920 | subdivide != 8 && subdivide != 16) | |
1921 | return -EINVAL; | |
1922 | runtime->oss.subdivision = subdivide; | |
1923 | runtime->oss.params = 1; | |
1924 | return subdivide; | |
1925 | } | |
1926 | ||
6ac77bc1 | 1927 | static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) |
1da177e4 LT |
1928 | { |
1929 | int err = -EINVAL, idx; | |
1930 | ||
1931 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 | 1932 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
02a5d692 TI |
1933 | struct snd_pcm_runtime *runtime; |
1934 | ||
1da177e4 LT |
1935 | if (substream == NULL) |
1936 | continue; | |
02a5d692 | 1937 | runtime = substream->runtime; |
f6d297df TI |
1938 | err = lock_params(runtime); |
1939 | if (err < 0) | |
1940 | return err; | |
02a5d692 | 1941 | err = snd_pcm_oss_set_subdivide1(substream, subdivide); |
f6d297df | 1942 | unlock_params(runtime); |
02a5d692 | 1943 | if (err < 0) |
1da177e4 LT |
1944 | return err; |
1945 | } | |
1946 | return err; | |
1947 | } | |
1948 | ||
6ac77bc1 | 1949 | static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) |
1da177e4 | 1950 | { |
6ac77bc1 | 1951 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1952 | |
1da177e4 LT |
1953 | runtime = substream->runtime; |
1954 | if (runtime->oss.subdivision || runtime->oss.fragshift) | |
1955 | return -EINVAL; | |
1956 | runtime->oss.fragshift = val & 0xffff; | |
1957 | runtime->oss.maxfrags = (val >> 16) & 0xffff; | |
1958 | if (runtime->oss.fragshift < 4) /* < 16 */ | |
1959 | runtime->oss.fragshift = 4; | |
1960 | if (runtime->oss.maxfrags < 2) | |
1961 | runtime->oss.maxfrags = 2; | |
1962 | runtime->oss.params = 1; | |
1963 | return 0; | |
1964 | } | |
1965 | ||
6ac77bc1 | 1966 | static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) |
1da177e4 LT |
1967 | { |
1968 | int err = -EINVAL, idx; | |
1969 | ||
1970 | for (idx = 1; idx >= 0; --idx) { | |
6ac77bc1 | 1971 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
02a5d692 TI |
1972 | struct snd_pcm_runtime *runtime; |
1973 | ||
1da177e4 LT |
1974 | if (substream == NULL) |
1975 | continue; | |
02a5d692 | 1976 | runtime = substream->runtime; |
f6d297df TI |
1977 | err = lock_params(runtime); |
1978 | if (err < 0) | |
1979 | return err; | |
02a5d692 | 1980 | err = snd_pcm_oss_set_fragment1(substream, val); |
f6d297df | 1981 | unlock_params(runtime); |
02a5d692 | 1982 | if (err < 0) |
1da177e4 LT |
1983 | return err; |
1984 | } | |
1985 | return err; | |
1986 | } | |
1987 | ||
1988 | static int snd_pcm_oss_nonblock(struct file * file) | |
1989 | { | |
db1dd4d3 | 1990 | spin_lock(&file->f_lock); |
1da177e4 | 1991 | file->f_flags |= O_NONBLOCK; |
db1dd4d3 | 1992 | spin_unlock(&file->f_lock); |
1da177e4 LT |
1993 | return 0; |
1994 | } | |
1995 | ||
6ac77bc1 | 1996 | static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) |
1da177e4 LT |
1997 | { |
1998 | ||
1999 | if (substream == NULL) { | |
2000 | res &= ~DSP_CAP_DUPLEX; | |
2001 | return res; | |
2002 | } | |
2003 | #ifdef DSP_CAP_MULTI | |
2004 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2005 | if (substream->pstr->substream_count > 1) | |
2006 | res |= DSP_CAP_MULTI; | |
2007 | #endif | |
2008 | /* DSP_CAP_REALTIME is set all times: */ | |
2009 | /* all ALSA drivers can return actual pointer in ring buffer */ | |
2010 | #if defined(DSP_CAP_REALTIME) && 0 | |
2011 | { | |
6ac77bc1 | 2012 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2013 | if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) |
2014 | res &= ~DSP_CAP_REALTIME; | |
2015 | } | |
2016 | #endif | |
2017 | return res; | |
2018 | } | |
2019 | ||
6ac77bc1 | 2020 | static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 LT |
2021 | { |
2022 | int result, idx; | |
2023 | ||
2024 | result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; | |
2025 | for (idx = 0; idx < 2; idx++) { | |
6ac77bc1 | 2026 | struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
1da177e4 LT |
2027 | result = snd_pcm_oss_get_caps1(substream, result); |
2028 | } | |
2029 | result |= 0x0001; /* revision - same as SB AWE 64 */ | |
2030 | return result; | |
2031 | } | |
2032 | ||
f240406b JK |
2033 | static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, |
2034 | snd_pcm_uframes_t hw_ptr) | |
1da177e4 | 2035 | { |
6ac77bc1 | 2036 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2037 | snd_pcm_uframes_t appl_ptr; |
2038 | appl_ptr = hw_ptr + runtime->buffer_size; | |
2039 | appl_ptr %= runtime->boundary; | |
2040 | runtime->control->appl_ptr = appl_ptr; | |
2041 | } | |
2042 | ||
6ac77bc1 | 2043 | static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) |
1da177e4 | 2044 | { |
6ac77bc1 TI |
2045 | struct snd_pcm_runtime *runtime; |
2046 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; | |
1da177e4 LT |
2047 | int err, cmd; |
2048 | ||
2049 | #ifdef OSS_DEBUG | |
61efcee8 | 2050 | pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); |
1da177e4 LT |
2051 | #endif |
2052 | ||
2053 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2054 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2055 | ||
2056 | if (psubstream) { | |
2057 | if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) | |
2058 | return err; | |
2059 | } | |
2060 | if (csubstream) { | |
2061 | if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) | |
2062 | return err; | |
2063 | } | |
2064 | if (psubstream) { | |
2065 | runtime = psubstream->runtime; | |
02a5d692 TI |
2066 | cmd = 0; |
2067 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) | |
2068 | return -ERESTARTSYS; | |
1da177e4 LT |
2069 | if (trigger & PCM_ENABLE_OUTPUT) { |
2070 | if (runtime->oss.trigger) | |
2071 | goto _skip1; | |
9c323fcb | 2072 | if (atomic_read(&psubstream->mmap_count)) |
f240406b JK |
2073 | snd_pcm_oss_simulate_fill(psubstream, |
2074 | get_hw_ptr_period(runtime)); | |
1da177e4 LT |
2075 | runtime->oss.trigger = 1; |
2076 | runtime->start_threshold = 1; | |
2077 | cmd = SNDRV_PCM_IOCTL_START; | |
2078 | } else { | |
2079 | if (!runtime->oss.trigger) | |
2080 | goto _skip1; | |
2081 | runtime->oss.trigger = 0; | |
2082 | runtime->start_threshold = runtime->boundary; | |
2083 | cmd = SNDRV_PCM_IOCTL_DROP; | |
2084 | runtime->oss.prepare = 1; | |
2085 | } | |
1da177e4 | 2086 | _skip1: |
02a5d692 TI |
2087 | mutex_unlock(&runtime->oss.params_lock); |
2088 | if (cmd) { | |
2089 | err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); | |
2090 | if (err < 0) | |
2091 | return err; | |
2092 | } | |
2093 | } | |
1da177e4 LT |
2094 | if (csubstream) { |
2095 | runtime = csubstream->runtime; | |
02a5d692 TI |
2096 | cmd = 0; |
2097 | if (mutex_lock_interruptible(&runtime->oss.params_lock)) | |
2098 | return -ERESTARTSYS; | |
1da177e4 LT |
2099 | if (trigger & PCM_ENABLE_INPUT) { |
2100 | if (runtime->oss.trigger) | |
2101 | goto _skip2; | |
2102 | runtime->oss.trigger = 1; | |
2103 | runtime->start_threshold = 1; | |
2104 | cmd = SNDRV_PCM_IOCTL_START; | |
2105 | } else { | |
2106 | if (!runtime->oss.trigger) | |
2107 | goto _skip2; | |
2108 | runtime->oss.trigger = 0; | |
2109 | runtime->start_threshold = runtime->boundary; | |
2110 | cmd = SNDRV_PCM_IOCTL_DROP; | |
2111 | runtime->oss.prepare = 1; | |
2112 | } | |
1da177e4 | 2113 | _skip2: |
02a5d692 TI |
2114 | mutex_unlock(&runtime->oss.params_lock); |
2115 | if (cmd) { | |
2116 | err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); | |
2117 | if (err < 0) | |
2118 | return err; | |
2119 | } | |
2120 | } | |
1da177e4 LT |
2121 | return 0; |
2122 | } | |
2123 | ||
6ac77bc1 | 2124 | static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 2125 | { |
6ac77bc1 | 2126 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
1da177e4 LT |
2127 | int result = 0; |
2128 | ||
2129 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2130 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2131 | if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) | |
2132 | result |= PCM_ENABLE_OUTPUT; | |
2133 | if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) | |
2134 | result |= PCM_ENABLE_INPUT; | |
2135 | return result; | |
2136 | } | |
2137 | ||
6ac77bc1 | 2138 | static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 | 2139 | { |
6ac77bc1 TI |
2140 | struct snd_pcm_substream *substream; |
2141 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2142 | snd_pcm_sframes_t delay; |
2143 | int err; | |
2144 | ||
2145 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2146 | if (substream == NULL) | |
2147 | return -EINVAL; | |
2148 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
2149 | return err; | |
2150 | runtime = substream->runtime; | |
2151 | if (runtime->oss.params || runtime->oss.prepare) | |
2152 | return 0; | |
bf1bbb5a | 2153 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); |
1da177e4 LT |
2154 | if (err == -EPIPE) |
2155 | delay = 0; /* hack for broken OSS applications */ | |
2156 | else if (err < 0) | |
2157 | return err; | |
2158 | return snd_pcm_oss_bytes(substream, delay); | |
2159 | } | |
2160 | ||
6ac77bc1 | 2161 | static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) |
1da177e4 | 2162 | { |
6ac77bc1 TI |
2163 | struct snd_pcm_substream *substream; |
2164 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2165 | snd_pcm_sframes_t delay; |
2166 | int fixup; | |
2167 | struct count_info info; | |
2168 | int err; | |
2169 | ||
2170 | if (_info == NULL) | |
2171 | return -EFAULT; | |
2172 | substream = pcm_oss_file->streams[stream]; | |
2173 | if (substream == NULL) | |
2174 | return -EINVAL; | |
2175 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) | |
2176 | return err; | |
2177 | runtime = substream->runtime; | |
2178 | if (runtime->oss.params || runtime->oss.prepare) { | |
2179 | memset(&info, 0, sizeof(info)); | |
2180 | if (copy_to_user(_info, &info, sizeof(info))) | |
2181 | return -EFAULT; | |
2182 | return 0; | |
2183 | } | |
2184 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
2185 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); | |
2186 | if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { | |
2187 | err = 0; | |
2188 | delay = 0; | |
2189 | fixup = 0; | |
2190 | } else { | |
2191 | fixup = runtime->oss.buffer_used; | |
2192 | } | |
2193 | } else { | |
2194 | err = snd_pcm_oss_capture_position_fixup(substream, &delay); | |
2195 | fixup = -runtime->oss.buffer_used; | |
2196 | } | |
2197 | if (err < 0) | |
2198 | return err; | |
2199 | info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); | |
9c323fcb | 2200 | if (atomic_read(&substream->mmap_count)) { |
1da177e4 | 2201 | snd_pcm_sframes_t n; |
f240406b JK |
2202 | delay = get_hw_ptr_period(runtime); |
2203 | n = delay - runtime->oss.prev_hw_ptr_period; | |
1da177e4 LT |
2204 | if (n < 0) |
2205 | n += runtime->boundary; | |
2206 | info.blocks = n / runtime->period_size; | |
f240406b | 2207 | runtime->oss.prev_hw_ptr_period = delay; |
1da177e4 LT |
2208 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
2209 | snd_pcm_oss_simulate_fill(substream, delay); | |
2210 | info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; | |
2211 | } else { | |
5ac0fab9 | 2212 | delay = snd_pcm_oss_bytes(substream, delay); |
fb4bd0ad | 2213 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
060d77b9 | 2214 | if (substream->oss.setup.buggyptr) |
10f69f9e TI |
2215 | info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; |
2216 | else | |
2217 | info.blocks = (delay + fixup) / runtime->oss.period_bytes; | |
1da177e4 | 2218 | info.bytes = (runtime->oss.bytes - delay) & INT_MAX; |
fb4bd0ad | 2219 | } else { |
5ac0fab9 JK |
2220 | delay += fixup; |
2221 | info.blocks = delay / runtime->oss.period_bytes; | |
1da177e4 | 2222 | info.bytes = (runtime->oss.bytes + delay) & INT_MAX; |
fb4bd0ad | 2223 | } |
1da177e4 LT |
2224 | } |
2225 | if (copy_to_user(_info, &info, sizeof(info))) | |
2226 | return -EFAULT; | |
2227 | return 0; | |
2228 | } | |
2229 | ||
6ac77bc1 | 2230 | static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) |
1da177e4 | 2231 | { |
6ac77bc1 TI |
2232 | struct snd_pcm_substream *substream; |
2233 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2234 | snd_pcm_sframes_t avail; |
2235 | int fixup; | |
2236 | struct audio_buf_info info; | |
2237 | int err; | |
2238 | ||
2239 | if (_info == NULL) | |
2240 | return -EFAULT; | |
2241 | substream = pcm_oss_file->streams[stream]; | |
2242 | if (substream == NULL) | |
2243 | return -EINVAL; | |
2244 | runtime = substream->runtime; | |
2245 | ||
2246 | if (runtime->oss.params && | |
b2483716 | 2247 | (err = snd_pcm_oss_change_params(substream, false)) < 0) |
1da177e4 LT |
2248 | return err; |
2249 | ||
2250 | info.fragsize = runtime->oss.period_bytes; | |
2251 | info.fragstotal = runtime->periods; | |
2252 | if (runtime->oss.prepare) { | |
2253 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
2254 | info.bytes = runtime->oss.period_bytes * runtime->oss.periods; | |
2255 | info.fragments = runtime->oss.periods; | |
2256 | } else { | |
2257 | info.bytes = 0; | |
2258 | info.fragments = 0; | |
2259 | } | |
2260 | } else { | |
2261 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
2262 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); | |
2263 | if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { | |
2264 | avail = runtime->buffer_size; | |
2265 | err = 0; | |
2266 | fixup = 0; | |
2267 | } else { | |
2268 | avail = runtime->buffer_size - avail; | |
2269 | fixup = -runtime->oss.buffer_used; | |
2270 | } | |
2271 | } else { | |
2272 | err = snd_pcm_oss_capture_position_fixup(substream, &avail); | |
2273 | fixup = runtime->oss.buffer_used; | |
2274 | } | |
2275 | if (err < 0) | |
2276 | return err; | |
2277 | info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; | |
2278 | info.fragments = info.bytes / runtime->oss.period_bytes; | |
2279 | } | |
2280 | ||
2281 | #ifdef OSS_DEBUG | |
61efcee8 TI |
2282 | pcm_dbg(substream->pcm, |
2283 | "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", | |
2284 | info.bytes, info.fragments, info.fragstotal, info.fragsize); | |
1da177e4 LT |
2285 | #endif |
2286 | if (copy_to_user(_info, &info, sizeof(info))) | |
2287 | return -EFAULT; | |
2288 | return 0; | |
2289 | } | |
2290 | ||
6ac77bc1 | 2291 | static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) |
1da177e4 LT |
2292 | { |
2293 | // it won't be probably implemented | |
61efcee8 | 2294 | // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); |
1da177e4 LT |
2295 | return -EINVAL; |
2296 | } | |
2297 | ||
060d77b9 | 2298 | static const char *strip_task_path(const char *path) |
1da177e4 | 2299 | { |
060d77b9 TI |
2300 | const char *ptr, *ptrl = NULL; |
2301 | for (ptr = path; *ptr; ptr++) { | |
1da177e4 LT |
2302 | if (*ptr == '/') |
2303 | ptrl = ptr + 1; | |
1da177e4 | 2304 | } |
060d77b9 TI |
2305 | return ptrl; |
2306 | } | |
2307 | ||
2308 | static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, | |
2309 | const char *task_name, | |
2310 | struct snd_pcm_oss_setup *rsetup) | |
2311 | { | |
2312 | struct snd_pcm_oss_setup *setup; | |
2313 | ||
2314 | mutex_lock(&pcm->streams[stream].oss.setup_mutex); | |
2315 | do { | |
2316 | for (setup = pcm->streams[stream].oss.setup_list; setup; | |
2317 | setup = setup->next) { | |
2318 | if (!strcmp(setup->task_name, task_name)) | |
2319 | goto out; | |
1da177e4 | 2320 | } |
060d77b9 TI |
2321 | } while ((task_name = strip_task_path(task_name)) != NULL); |
2322 | out: | |
2323 | if (setup) | |
2324 | *rsetup = *setup; | |
1a60d4c5 | 2325 | mutex_unlock(&pcm->streams[stream].oss.setup_mutex); |
1da177e4 LT |
2326 | } |
2327 | ||
3bf75f9b TI |
2328 | static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) |
2329 | { | |
2330 | struct snd_pcm_runtime *runtime; | |
2331 | runtime = substream->runtime; | |
65766ee0 | 2332 | kvfree(runtime->oss.buffer); |
3bf75f9b TI |
2333 | runtime->oss.buffer = NULL; |
2334 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS | |
2335 | snd_pcm_oss_plugin_clear(substream); | |
2336 | #endif | |
2337 | substream->oss.oss = 0; | |
2338 | } | |
2339 | ||
6ac77bc1 TI |
2340 | static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, |
2341 | struct snd_pcm_oss_setup *setup, | |
1da177e4 LT |
2342 | int minor) |
2343 | { | |
6ac77bc1 | 2344 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2345 | |
2346 | substream->oss.oss = 1; | |
060d77b9 | 2347 | substream->oss.setup = *setup; |
3bf75f9b | 2348 | if (setup->nonblock) |
0df63e44 | 2349 | substream->f_flags |= O_NONBLOCK; |
1576274d | 2350 | else if (setup->block) |
0df63e44 | 2351 | substream->f_flags &= ~O_NONBLOCK; |
1da177e4 LT |
2352 | runtime = substream->runtime; |
2353 | runtime->oss.params = 1; | |
2354 | runtime->oss.trigger = 1; | |
2355 | runtime->oss.rate = 8000; | |
e3a5d59a | 2356 | mutex_init(&runtime->oss.params_lock); |
1da177e4 LT |
2357 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { |
2358 | case SNDRV_MINOR_OSS_PCM_8: | |
2359 | runtime->oss.format = AFMT_U8; | |
2360 | break; | |
2361 | case SNDRV_MINOR_OSS_PCM_16: | |
2362 | runtime->oss.format = AFMT_S16_LE; | |
2363 | break; | |
2364 | default: | |
2365 | runtime->oss.format = AFMT_MU_LAW; | |
2366 | } | |
2367 | runtime->oss.channels = 1; | |
2368 | runtime->oss.fragshift = 0; | |
2369 | runtime->oss.maxfrags = 0; | |
2370 | runtime->oss.subdivision = 0; | |
3bf75f9b | 2371 | substream->pcm_release = snd_pcm_oss_release_substream; |
40cab6e8 | 2372 | atomic_set(&runtime->oss.rw_ref, 0); |
1da177e4 LT |
2373 | } |
2374 | ||
6ac77bc1 | 2375 | static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) |
1da177e4 LT |
2376 | { |
2377 | int cidx; | |
7eaa943c TI |
2378 | if (!pcm_oss_file) |
2379 | return 0; | |
1da177e4 | 2380 | for (cidx = 0; cidx < 2; ++cidx) { |
6ac77bc1 | 2381 | struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; |
3bf75f9b TI |
2382 | if (substream) |
2383 | snd_pcm_release_substream(substream); | |
1da177e4 LT |
2384 | } |
2385 | kfree(pcm_oss_file); | |
2386 | return 0; | |
2387 | } | |
2388 | ||
2389 | static int snd_pcm_oss_open_file(struct file *file, | |
6ac77bc1 TI |
2390 | struct snd_pcm *pcm, |
2391 | struct snd_pcm_oss_file **rpcm_oss_file, | |
1da177e4 | 2392 | int minor, |
060d77b9 | 2393 | struct snd_pcm_oss_setup *setup) |
1da177e4 | 2394 | { |
3bf75f9b | 2395 | int idx, err; |
6ac77bc1 | 2396 | struct snd_pcm_oss_file *pcm_oss_file; |
3bf75f9b | 2397 | struct snd_pcm_substream *substream; |
aeb5d727 | 2398 | fmode_t f_mode = file->f_mode; |
1da177e4 | 2399 | |
7eaa943c TI |
2400 | if (rpcm_oss_file) |
2401 | *rpcm_oss_file = NULL; | |
1da177e4 | 2402 | |
ca2c0966 | 2403 | pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); |
1da177e4 LT |
2404 | if (pcm_oss_file == NULL) |
2405 | return -ENOMEM; | |
2406 | ||
2407 | if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && | |
2408 | (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) | |
2409 | f_mode = FMODE_WRITE; | |
3bf75f9b | 2410 | |
0df63e44 | 2411 | file->f_flags &= ~O_APPEND; |
3bf75f9b | 2412 | for (idx = 0; idx < 2; idx++) { |
060d77b9 | 2413 | if (setup[idx].disable) |
3bf75f9b | 2414 | continue; |
6cb53e7e TI |
2415 | if (! pcm->streams[idx].substream_count) |
2416 | continue; /* no matching substream */ | |
3bf75f9b TI |
2417 | if (idx == SNDRV_PCM_STREAM_PLAYBACK) { |
2418 | if (! (f_mode & FMODE_WRITE)) | |
2419 | continue; | |
2420 | } else { | |
2421 | if (! (f_mode & FMODE_READ)) | |
2422 | continue; | |
2423 | } | |
2424 | err = snd_pcm_open_substream(pcm, idx, file, &substream); | |
2425 | if (err < 0) { | |
1da177e4 LT |
2426 | snd_pcm_oss_release_file(pcm_oss_file); |
2427 | return err; | |
2428 | } | |
3bf75f9b TI |
2429 | |
2430 | pcm_oss_file->streams[idx] = substream; | |
060d77b9 | 2431 | snd_pcm_oss_init_substream(substream, &setup[idx], minor); |
1da177e4 LT |
2432 | } |
2433 | ||
bbdc1b7d | 2434 | if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { |
1da177e4 LT |
2435 | snd_pcm_oss_release_file(pcm_oss_file); |
2436 | return -EINVAL; | |
2437 | } | |
1da177e4 LT |
2438 | |
2439 | file->private_data = pcm_oss_file; | |
7eaa943c TI |
2440 | if (rpcm_oss_file) |
2441 | *rpcm_oss_file = pcm_oss_file; | |
1da177e4 LT |
2442 | return 0; |
2443 | } | |
2444 | ||
2445 | ||
93f2e378 TI |
2446 | static int snd_task_name(struct task_struct *task, char *name, size_t size) |
2447 | { | |
2448 | unsigned int idx; | |
2449 | ||
7eaa943c TI |
2450 | if (snd_BUG_ON(!task || !name || size < 2)) |
2451 | return -EINVAL; | |
93f2e378 TI |
2452 | for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) |
2453 | name[idx] = task->comm[idx]; | |
2454 | name[idx] = '\0'; | |
2455 | return 0; | |
2456 | } | |
2457 | ||
1da177e4 LT |
2458 | static int snd_pcm_oss_open(struct inode *inode, struct file *file) |
2459 | { | |
1da177e4 LT |
2460 | int err; |
2461 | char task_name[32]; | |
6ac77bc1 TI |
2462 | struct snd_pcm *pcm; |
2463 | struct snd_pcm_oss_file *pcm_oss_file; | |
060d77b9 | 2464 | struct snd_pcm_oss_setup setup[2]; |
1da177e4 | 2465 | int nonblock; |
ac6424b9 | 2466 | wait_queue_entry_t wait; |
1da177e4 | 2467 | |
02f4865f TI |
2468 | err = nonseekable_open(inode, file); |
2469 | if (err < 0) | |
2470 | return err; | |
2471 | ||
f87135f5 CL |
2472 | pcm = snd_lookup_oss_minor_data(iminor(inode), |
2473 | SNDRV_OSS_DEVICE_TYPE_PCM); | |
1da177e4 LT |
2474 | if (pcm == NULL) { |
2475 | err = -ENODEV; | |
2476 | goto __error1; | |
2477 | } | |
2478 | err = snd_card_file_add(pcm->card, file); | |
2479 | if (err < 0) | |
2480 | goto __error1; | |
2481 | if (!try_module_get(pcm->card->module)) { | |
2482 | err = -EFAULT; | |
2483 | goto __error2; | |
2484 | } | |
2485 | if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { | |
2486 | err = -EFAULT; | |
2487 | goto __error; | |
2488 | } | |
1576274d | 2489 | memset(setup, 0, sizeof(setup)); |
1da177e4 | 2490 | if (file->f_mode & FMODE_WRITE) |
060d77b9 TI |
2491 | snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
2492 | task_name, &setup[0]); | |
1da177e4 | 2493 | if (file->f_mode & FMODE_READ) |
060d77b9 TI |
2494 | snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, |
2495 | task_name, &setup[1]); | |
1da177e4 LT |
2496 | |
2497 | nonblock = !!(file->f_flags & O_NONBLOCK); | |
1da177e4 LT |
2498 | if (!nonblock) |
2499 | nonblock = nonblock_open; | |
2500 | ||
2501 | init_waitqueue_entry(&wait, current); | |
2502 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2503 | mutex_lock(&pcm->open_mutex); |
1da177e4 LT |
2504 | while (1) { |
2505 | err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, | |
3bf75f9b | 2506 | iminor(inode), setup); |
1da177e4 LT |
2507 | if (err >= 0) |
2508 | break; | |
2509 | if (err == -EAGAIN) { | |
2510 | if (nonblock) { | |
2511 | err = -EBUSY; | |
2512 | break; | |
2513 | } | |
2514 | } else | |
2515 | break; | |
2516 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2517 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2518 | schedule(); |
1a60d4c5 | 2519 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2520 | if (pcm->card->shutdown) { |
2521 | err = -ENODEV; | |
2522 | break; | |
2523 | } | |
1da177e4 LT |
2524 | if (signal_pending(current)) { |
2525 | err = -ERESTARTSYS; | |
2526 | break; | |
2527 | } | |
2528 | } | |
2529 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2530 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2531 | if (err < 0) |
2532 | goto __error; | |
8bb4d9ce | 2533 | snd_card_unref(pcm->card); |
1da177e4 LT |
2534 | return err; |
2535 | ||
2536 | __error: | |
2537 | module_put(pcm->card->module); | |
2538 | __error2: | |
2539 | snd_card_file_remove(pcm->card, file); | |
2540 | __error1: | |
a0830dbd TI |
2541 | if (pcm) |
2542 | snd_card_unref(pcm->card); | |
1da177e4 LT |
2543 | return err; |
2544 | } | |
2545 | ||
2546 | static int snd_pcm_oss_release(struct inode *inode, struct file *file) | |
2547 | { | |
6ac77bc1 TI |
2548 | struct snd_pcm *pcm; |
2549 | struct snd_pcm_substream *substream; | |
2550 | struct snd_pcm_oss_file *pcm_oss_file; | |
1da177e4 LT |
2551 | |
2552 | pcm_oss_file = file->private_data; | |
2553 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2554 | if (substream == NULL) | |
2555 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
7eaa943c TI |
2556 | if (snd_BUG_ON(!substream)) |
2557 | return -ENXIO; | |
1da177e4 | 2558 | pcm = substream->pcm; |
de1b8b93 TI |
2559 | if (!pcm->card->shutdown) |
2560 | snd_pcm_oss_sync(pcm_oss_file); | |
1a60d4c5 | 2561 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2562 | snd_pcm_oss_release_file(pcm_oss_file); |
1a60d4c5 | 2563 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2564 | wake_up(&pcm->open_wait); |
2565 | module_put(pcm->card->module); | |
2566 | snd_card_file_remove(pcm->card, file); | |
2567 | return 0; | |
2568 | } | |
2569 | ||
2570 | static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2571 | { | |
6ac77bc1 | 2572 | struct snd_pcm_oss_file *pcm_oss_file; |
1da177e4 LT |
2573 | int __user *p = (int __user *)arg; |
2574 | int res; | |
2575 | ||
2576 | pcm_oss_file = file->private_data; | |
2577 | if (cmd == OSS_GETVERSION) | |
2578 | return put_user(SNDRV_OSS_VERSION, p); | |
2579 | if (cmd == OSS_ALSAEMULVER) | |
2580 | return put_user(1, p); | |
658355b5 | 2581 | #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) |
1da177e4 | 2582 | if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ |
6ac77bc1 | 2583 | struct snd_pcm_substream *substream; |
1da177e4 LT |
2584 | int idx; |
2585 | for (idx = 0; idx < 2; ++idx) { | |
2586 | substream = pcm_oss_file->streams[idx]; | |
2587 | if (substream != NULL) | |
2588 | break; | |
2589 | } | |
7eaa943c TI |
2590 | if (snd_BUG_ON(idx >= 2)) |
2591 | return -ENXIO; | |
1da177e4 LT |
2592 | return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); |
2593 | } | |
2594 | #endif | |
2595 | if (((cmd >> 8) & 0xff) != 'P') | |
2596 | return -EINVAL; | |
2597 | #ifdef OSS_DEBUG | |
61efcee8 | 2598 | pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); |
1da177e4 LT |
2599 | #endif |
2600 | switch (cmd) { | |
2601 | case SNDCTL_DSP_RESET: | |
2602 | return snd_pcm_oss_reset(pcm_oss_file); | |
2603 | case SNDCTL_DSP_SYNC: | |
2604 | return snd_pcm_oss_sync(pcm_oss_file); | |
2605 | case SNDCTL_DSP_SPEED: | |
2606 | if (get_user(res, p)) | |
2607 | return -EFAULT; | |
2608 | if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) | |
2609 | return res; | |
2610 | return put_user(res, p); | |
2611 | case SOUND_PCM_READ_RATE: | |
2612 | res = snd_pcm_oss_get_rate(pcm_oss_file); | |
2613 | if (res < 0) | |
2614 | return res; | |
2615 | return put_user(res, p); | |
2616 | case SNDCTL_DSP_STEREO: | |
2617 | if (get_user(res, p)) | |
2618 | return -EFAULT; | |
2619 | res = res > 0 ? 2 : 1; | |
2620 | if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) | |
2621 | return res; | |
2622 | return put_user(--res, p); | |
2623 | case SNDCTL_DSP_GETBLKSIZE: | |
2624 | res = snd_pcm_oss_get_block_size(pcm_oss_file); | |
2625 | if (res < 0) | |
2626 | return res; | |
2627 | return put_user(res, p); | |
2628 | case SNDCTL_DSP_SETFMT: | |
2629 | if (get_user(res, p)) | |
2630 | return -EFAULT; | |
2631 | res = snd_pcm_oss_set_format(pcm_oss_file, res); | |
2632 | if (res < 0) | |
2633 | return res; | |
2634 | return put_user(res, p); | |
2635 | case SOUND_PCM_READ_BITS: | |
2636 | res = snd_pcm_oss_get_format(pcm_oss_file); | |
2637 | if (res < 0) | |
2638 | return res; | |
2639 | return put_user(res, p); | |
2640 | case SNDCTL_DSP_CHANNELS: | |
2641 | if (get_user(res, p)) | |
2642 | return -EFAULT; | |
2643 | res = snd_pcm_oss_set_channels(pcm_oss_file, res); | |
2644 | if (res < 0) | |
2645 | return res; | |
2646 | return put_user(res, p); | |
2647 | case SOUND_PCM_READ_CHANNELS: | |
2648 | res = snd_pcm_oss_get_channels(pcm_oss_file); | |
2649 | if (res < 0) | |
2650 | return res; | |
2651 | return put_user(res, p); | |
2652 | case SOUND_PCM_WRITE_FILTER: | |
2653 | case SOUND_PCM_READ_FILTER: | |
2654 | return -EIO; | |
2655 | case SNDCTL_DSP_POST: | |
2656 | return snd_pcm_oss_post(pcm_oss_file); | |
2657 | case SNDCTL_DSP_SUBDIVIDE: | |
2658 | if (get_user(res, p)) | |
2659 | return -EFAULT; | |
2660 | res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); | |
2661 | if (res < 0) | |
2662 | return res; | |
2663 | return put_user(res, p); | |
2664 | case SNDCTL_DSP_SETFRAGMENT: | |
2665 | if (get_user(res, p)) | |
2666 | return -EFAULT; | |
2667 | return snd_pcm_oss_set_fragment(pcm_oss_file, res); | |
2668 | case SNDCTL_DSP_GETFMTS: | |
2669 | res = snd_pcm_oss_get_formats(pcm_oss_file); | |
2670 | if (res < 0) | |
2671 | return res; | |
2672 | return put_user(res, p); | |
2673 | case SNDCTL_DSP_GETOSPACE: | |
2674 | case SNDCTL_DSP_GETISPACE: | |
2675 | return snd_pcm_oss_get_space(pcm_oss_file, | |
2676 | cmd == SNDCTL_DSP_GETISPACE ? | |
2677 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, | |
2678 | (struct audio_buf_info __user *) arg); | |
2679 | case SNDCTL_DSP_NONBLOCK: | |
2680 | return snd_pcm_oss_nonblock(file); | |
2681 | case SNDCTL_DSP_GETCAPS: | |
2682 | res = snd_pcm_oss_get_caps(pcm_oss_file); | |
2683 | if (res < 0) | |
2684 | return res; | |
2685 | return put_user(res, p); | |
2686 | case SNDCTL_DSP_GETTRIGGER: | |
2687 | res = snd_pcm_oss_get_trigger(pcm_oss_file); | |
2688 | if (res < 0) | |
2689 | return res; | |
2690 | return put_user(res, p); | |
2691 | case SNDCTL_DSP_SETTRIGGER: | |
2692 | if (get_user(res, p)) | |
2693 | return -EFAULT; | |
2694 | return snd_pcm_oss_set_trigger(pcm_oss_file, res); | |
2695 | case SNDCTL_DSP_GETIPTR: | |
2696 | case SNDCTL_DSP_GETOPTR: | |
2697 | return snd_pcm_oss_get_ptr(pcm_oss_file, | |
2698 | cmd == SNDCTL_DSP_GETIPTR ? | |
2699 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, | |
2700 | (struct count_info __user *) arg); | |
2701 | case SNDCTL_DSP_MAPINBUF: | |
2702 | case SNDCTL_DSP_MAPOUTBUF: | |
2703 | return snd_pcm_oss_get_mapbuf(pcm_oss_file, | |
2704 | cmd == SNDCTL_DSP_MAPINBUF ? | |
2705 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, | |
2706 | (struct buffmem_desc __user *) arg); | |
2707 | case SNDCTL_DSP_SETSYNCRO: | |
2708 | /* stop DMA now.. */ | |
2709 | return 0; | |
2710 | case SNDCTL_DSP_SETDUPLEX: | |
2711 | if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) | |
2712 | return 0; | |
2713 | return -EIO; | |
2714 | case SNDCTL_DSP_GETODELAY: | |
2715 | res = snd_pcm_oss_get_odelay(pcm_oss_file); | |
2716 | if (res < 0) { | |
2717 | /* it's for sure, some broken apps don't check for error codes */ | |
2718 | put_user(0, p); | |
2719 | return res; | |
2720 | } | |
2721 | return put_user(res, p); | |
2722 | case SNDCTL_DSP_PROFILE: | |
2723 | return 0; /* silently ignore */ | |
2724 | default: | |
61efcee8 | 2725 | pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); |
1da177e4 LT |
2726 | } |
2727 | return -EINVAL; | |
2728 | } | |
2729 | ||
2730 | #ifdef CONFIG_COMPAT | |
2731 | /* all compatible */ | |
83266b6b TI |
2732 | static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, |
2733 | unsigned long arg) | |
2734 | { | |
2735 | return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); | |
2736 | } | |
1da177e4 LT |
2737 | #else |
2738 | #define snd_pcm_oss_ioctl_compat NULL | |
2739 | #endif | |
2740 | ||
2741 | static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) | |
2742 | { | |
6ac77bc1 TI |
2743 | struct snd_pcm_oss_file *pcm_oss_file; |
2744 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
2745 | |
2746 | pcm_oss_file = file->private_data; | |
2747 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2748 | if (substream == NULL) | |
2749 | return -ENXIO; | |
0df63e44 | 2750 | substream->f_flags = file->f_flags & O_NONBLOCK; |
1da177e4 LT |
2751 | #ifndef OSS_DEBUG |
2752 | return snd_pcm_oss_read1(substream, buf, count); | |
2753 | #else | |
2754 | { | |
2755 | ssize_t res = snd_pcm_oss_read1(substream, buf, count); | |
61efcee8 TI |
2756 | pcm_dbg(substream->pcm, |
2757 | "pcm_oss: read %li bytes (returned %li bytes)\n", | |
2758 | (long)count, (long)res); | |
1da177e4 LT |
2759 | return res; |
2760 | } | |
2761 | #endif | |
2762 | } | |
2763 | ||
2764 | static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) | |
2765 | { | |
6ac77bc1 TI |
2766 | struct snd_pcm_oss_file *pcm_oss_file; |
2767 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
2768 | long result; |
2769 | ||
2770 | pcm_oss_file = file->private_data; | |
2771 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2772 | if (substream == NULL) | |
2773 | return -ENXIO; | |
0df63e44 | 2774 | substream->f_flags = file->f_flags & O_NONBLOCK; |
1da177e4 | 2775 | result = snd_pcm_oss_write1(substream, buf, count); |
1da177e4 | 2776 | #ifdef OSS_DEBUG |
61efcee8 | 2777 | pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", |
006de267 | 2778 | (long)count, (long)result); |
1da177e4 LT |
2779 | #endif |
2780 | return result; | |
2781 | } | |
2782 | ||
6ac77bc1 | 2783 | static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) |
1da177e4 | 2784 | { |
6ac77bc1 | 2785 | struct snd_pcm_runtime *runtime = substream->runtime; |
9c323fcb | 2786 | if (atomic_read(&substream->mmap_count)) |
f240406b JK |
2787 | return runtime->oss.prev_hw_ptr_period != |
2788 | get_hw_ptr_period(runtime); | |
1da177e4 | 2789 | else |
f240406b JK |
2790 | return snd_pcm_playback_avail(runtime) >= |
2791 | runtime->oss.period_frames; | |
1da177e4 LT |
2792 | } |
2793 | ||
6ac77bc1 | 2794 | static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) |
1da177e4 | 2795 | { |
6ac77bc1 | 2796 | struct snd_pcm_runtime *runtime = substream->runtime; |
9c323fcb | 2797 | if (atomic_read(&substream->mmap_count)) |
f240406b JK |
2798 | return runtime->oss.prev_hw_ptr_period != |
2799 | get_hw_ptr_period(runtime); | |
1da177e4 | 2800 | else |
f240406b JK |
2801 | return snd_pcm_capture_avail(runtime) >= |
2802 | runtime->oss.period_frames; | |
1da177e4 LT |
2803 | } |
2804 | ||
680ef72a | 2805 | static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) |
1da177e4 | 2806 | { |
6ac77bc1 | 2807 | struct snd_pcm_oss_file *pcm_oss_file; |
680ef72a | 2808 | __poll_t mask; |
6ac77bc1 | 2809 | struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
1da177e4 LT |
2810 | |
2811 | pcm_oss_file = file->private_data; | |
2812 | ||
2813 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2814 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2815 | ||
2816 | mask = 0; | |
2817 | if (psubstream != NULL) { | |
6ac77bc1 | 2818 | struct snd_pcm_runtime *runtime = psubstream->runtime; |
1da177e4 LT |
2819 | poll_wait(file, &runtime->sleep, wait); |
2820 | snd_pcm_stream_lock_irq(psubstream); | |
2821 | if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && | |
2822 | (runtime->status->state != SNDRV_PCM_STATE_RUNNING || | |
2823 | snd_pcm_oss_playback_ready(psubstream))) | |
a9a08845 | 2824 | mask |= EPOLLOUT | EPOLLWRNORM; |
1da177e4 LT |
2825 | snd_pcm_stream_unlock_irq(psubstream); |
2826 | } | |
2827 | if (csubstream != NULL) { | |
6ac77bc1 TI |
2828 | struct snd_pcm_runtime *runtime = csubstream->runtime; |
2829 | snd_pcm_state_t ostate; | |
1da177e4 LT |
2830 | poll_wait(file, &runtime->sleep, wait); |
2831 | snd_pcm_stream_lock_irq(csubstream); | |
2832 | if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || | |
2833 | snd_pcm_oss_capture_ready(csubstream)) | |
a9a08845 | 2834 | mask |= EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
2835 | snd_pcm_stream_unlock_irq(csubstream); |
2836 | if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { | |
6ac77bc1 | 2837 | struct snd_pcm_oss_file ofile; |
1da177e4 LT |
2838 | memset(&ofile, 0, sizeof(ofile)); |
2839 | ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2840 | runtime->oss.trigger = 0; | |
2841 | snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); | |
2842 | } | |
2843 | } | |
2844 | ||
2845 | return mask; | |
2846 | } | |
2847 | ||
2848 | static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) | |
2849 | { | |
6ac77bc1 TI |
2850 | struct snd_pcm_oss_file *pcm_oss_file; |
2851 | struct snd_pcm_substream *substream = NULL; | |
2852 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
2853 | int err; |
2854 | ||
2855 | #ifdef OSS_DEBUG | |
61efcee8 | 2856 | pr_debug("pcm_oss: mmap begin\n"); |
1da177e4 LT |
2857 | #endif |
2858 | pcm_oss_file = file->private_data; | |
2859 | switch ((area->vm_flags & (VM_READ | VM_WRITE))) { | |
2860 | case VM_READ | VM_WRITE: | |
2861 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2862 | if (substream) | |
2863 | break; | |
2864 | /* Fall through */ | |
2865 | case VM_READ: | |
2866 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; | |
2867 | break; | |
2868 | case VM_WRITE: | |
2869 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; | |
2870 | break; | |
2871 | default: | |
2872 | return -EINVAL; | |
2873 | } | |
2874 | /* set VM_READ access as well to fix memset() routines that do | |
2875 | reads before writes (to improve performance) */ | |
2876 | area->vm_flags |= VM_READ; | |
2877 | if (substream == NULL) | |
2878 | return -ENXIO; | |
2879 | runtime = substream->runtime; | |
2880 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) | |
2881 | return -EIO; | |
2882 | if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2883 | runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2884 | else | |
2885 | return -EIO; | |
2886 | ||
2887 | if (runtime->oss.params) { | |
b2483716 TI |
2888 | /* use mutex_trylock() for params_lock for avoiding a deadlock |
2889 | * between mmap_sem and params_lock taken by | |
2890 | * copy_from/to_user() in snd_pcm_oss_write/read() | |
2891 | */ | |
2892 | err = snd_pcm_oss_change_params(substream, true); | |
2893 | if (err < 0) | |
1da177e4 LT |
2894 | return err; |
2895 | } | |
21a3479a | 2896 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
1da177e4 LT |
2897 | if (runtime->oss.plugin_first != NULL) |
2898 | return -EIO; | |
21a3479a | 2899 | #endif |
1da177e4 LT |
2900 | |
2901 | if (area->vm_pgoff != 0) | |
2902 | return -EINVAL; | |
2903 | ||
2904 | err = snd_pcm_mmap_data(substream, file, area); | |
2905 | if (err < 0) | |
2906 | return err; | |
2907 | runtime->oss.mmap_bytes = area->vm_end - area->vm_start; | |
2908 | runtime->silence_threshold = 0; | |
2909 | runtime->silence_size = 0; | |
2910 | #ifdef OSS_DEBUG | |
61efcee8 | 2911 | pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", |
006de267 | 2912 | runtime->oss.mmap_bytes); |
1da177e4 LT |
2913 | #endif |
2914 | /* In mmap mode we never stop */ | |
2915 | runtime->stop_threshold = runtime->boundary; | |
2916 | ||
2917 | return 0; | |
2918 | } | |
2919 | ||
b7d90a35 | 2920 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
1da177e4 LT |
2921 | /* |
2922 | * /proc interface | |
2923 | */ | |
2924 | ||
6ac77bc1 TI |
2925 | static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, |
2926 | struct snd_info_buffer *buffer) | |
1da177e4 | 2927 | { |
6ac77bc1 TI |
2928 | struct snd_pcm_str *pstr = entry->private_data; |
2929 | struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; | |
1a60d4c5 | 2930 | mutex_lock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2931 | while (setup) { |
2932 | snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", | |
2933 | setup->task_name, | |
2934 | setup->periods, | |
2935 | setup->period_size, | |
2936 | setup->disable ? " disable" : "", | |
2937 | setup->direct ? " direct" : "", | |
2938 | setup->block ? " block" : "", | |
2939 | setup->nonblock ? " non-block" : "", | |
2940 | setup->partialfrag ? " partial-frag" : "", | |
2941 | setup->nosilence ? " no-silence" : ""); | |
2942 | setup = setup->next; | |
2943 | } | |
1a60d4c5 | 2944 | mutex_unlock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2945 | } |
2946 | ||
6ac77bc1 | 2947 | static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) |
1da177e4 | 2948 | { |
6ac77bc1 | 2949 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 | 2950 | |
1da177e4 LT |
2951 | for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; |
2952 | setup; setup = setupn) { | |
2953 | setupn = setup->next; | |
2954 | kfree(setup->task_name); | |
2955 | kfree(setup); | |
2956 | } | |
2957 | pstr->oss.setup_list = NULL; | |
2958 | } | |
2959 | ||
6ac77bc1 TI |
2960 | static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, |
2961 | struct snd_info_buffer *buffer) | |
1da177e4 | 2962 | { |
6ac77bc1 | 2963 | struct snd_pcm_str *pstr = entry->private_data; |
4f7454a9 TI |
2964 | char line[128], str[32], task_name[32]; |
2965 | const char *ptr; | |
1da177e4 | 2966 | int idx1; |
6ac77bc1 | 2967 | struct snd_pcm_oss_setup *setup, *setup1, template; |
1da177e4 LT |
2968 | |
2969 | while (!snd_info_get_line(buffer, line, sizeof(line))) { | |
1a60d4c5 | 2970 | mutex_lock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2971 | memset(&template, 0, sizeof(template)); |
2972 | ptr = snd_info_get_str(task_name, line, sizeof(task_name)); | |
2973 | if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { | |
2974 | snd_pcm_oss_proc_free_setup_list(pstr); | |
1a60d4c5 | 2975 | mutex_unlock(&pstr->oss.setup_mutex); |
1da177e4 LT |
2976 | continue; |
2977 | } | |
2978 | for (setup = pstr->oss.setup_list; setup; setup = setup->next) { | |
2979 | if (!strcmp(setup->task_name, task_name)) { | |
2980 | template = *setup; | |
2981 | break; | |
2982 | } | |
2983 | } | |
2984 | ptr = snd_info_get_str(str, ptr, sizeof(str)); | |
2985 | template.periods = simple_strtoul(str, NULL, 10); | |
2986 | ptr = snd_info_get_str(str, ptr, sizeof(str)); | |
2987 | template.period_size = simple_strtoul(str, NULL, 10); | |
2988 | for (idx1 = 31; idx1 >= 0; idx1--) | |
2989 | if (template.period_size & (1 << idx1)) | |
2990 | break; | |
2991 | for (idx1--; idx1 >= 0; idx1--) | |
2992 | template.period_size &= ~(1 << idx1); | |
2993 | do { | |
2994 | ptr = snd_info_get_str(str, ptr, sizeof(str)); | |
2995 | if (!strcmp(str, "disable")) { | |
2996 | template.disable = 1; | |
2997 | } else if (!strcmp(str, "direct")) { | |
2998 | template.direct = 1; | |
2999 | } else if (!strcmp(str, "block")) { | |
3000 | template.block = 1; | |
3001 | } else if (!strcmp(str, "non-block")) { | |
3002 | template.nonblock = 1; | |
3003 | } else if (!strcmp(str, "partial-frag")) { | |
3004 | template.partialfrag = 1; | |
3005 | } else if (!strcmp(str, "no-silence")) { | |
3006 | template.nosilence = 1; | |
10f69f9e TI |
3007 | } else if (!strcmp(str, "buggy-ptr")) { |
3008 | template.buggyptr = 1; | |
1da177e4 LT |
3009 | } |
3010 | } while (*str); | |
3011 | if (setup == NULL) { | |
060d77b9 TI |
3012 | setup = kmalloc(sizeof(*setup), GFP_KERNEL); |
3013 | if (! setup) { | |
3014 | buffer->error = -ENOMEM; | |
91054598 | 3015 | mutex_unlock(&pstr->oss.setup_mutex); |
060d77b9 TI |
3016 | return; |
3017 | } | |
3018 | if (pstr->oss.setup_list == NULL) | |
3019 | pstr->oss.setup_list = setup; | |
3020 | else { | |
3021 | for (setup1 = pstr->oss.setup_list; | |
3022 | setup1->next; setup1 = setup1->next); | |
3023 | setup1->next = setup; | |
3024 | } | |
3025 | template.task_name = kstrdup(task_name, GFP_KERNEL); | |
3026 | if (! template.task_name) { | |
3027 | kfree(setup); | |
1da177e4 | 3028 | buffer->error = -ENOMEM; |
91054598 | 3029 | mutex_unlock(&pstr->oss.setup_mutex); |
060d77b9 | 3030 | return; |
1da177e4 LT |
3031 | } |
3032 | } | |
060d77b9 | 3033 | *setup = template; |
1a60d4c5 | 3034 | mutex_unlock(&pstr->oss.setup_mutex); |
1da177e4 LT |
3035 | } |
3036 | } | |
3037 | ||
6ac77bc1 | 3038 | static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) |
1da177e4 LT |
3039 | { |
3040 | int stream; | |
3041 | for (stream = 0; stream < 2; ++stream) { | |
6ac77bc1 TI |
3042 | struct snd_info_entry *entry; |
3043 | struct snd_pcm_str *pstr = &pcm->streams[stream]; | |
1da177e4 LT |
3044 | if (pstr->substream_count == 0) |
3045 | continue; | |
3046 | if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { | |
3047 | entry->content = SNDRV_INFO_CONTENT_TEXT; | |
6a73cf46 | 3048 | entry->mode = S_IFREG | 0644; |
1da177e4 | 3049 | entry->c.text.read = snd_pcm_oss_proc_read; |
1da177e4 LT |
3050 | entry->c.text.write = snd_pcm_oss_proc_write; |
3051 | entry->private_data = pstr; | |
3052 | if (snd_info_register(entry) < 0) { | |
3053 | snd_info_free_entry(entry); | |
3054 | entry = NULL; | |
3055 | } | |
3056 | } | |
3057 | pstr->oss.proc_entry = entry; | |
3058 | } | |
3059 | } | |
3060 | ||
6ac77bc1 | 3061 | static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) |
1da177e4 LT |
3062 | { |
3063 | int stream; | |
3064 | for (stream = 0; stream < 2; ++stream) { | |
6ac77bc1 | 3065 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
746d4a02 TI |
3066 | snd_info_free_entry(pstr->oss.proc_entry); |
3067 | pstr->oss.proc_entry = NULL; | |
3068 | snd_pcm_oss_proc_free_setup_list(pstr); | |
1da177e4 LT |
3069 | } |
3070 | } | |
b7d90a35 | 3071 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
04f141a8 TI |
3072 | #define snd_pcm_oss_proc_init(pcm) |
3073 | #define snd_pcm_oss_proc_done(pcm) | |
b7d90a35 | 3074 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
3075 | |
3076 | /* | |
3077 | * ENTRY functions | |
3078 | */ | |
3079 | ||
9c2e08c5 | 3080 | static const struct file_operations snd_pcm_oss_f_reg = |
1da177e4 LT |
3081 | { |
3082 | .owner = THIS_MODULE, | |
3083 | .read = snd_pcm_oss_read, | |
3084 | .write = snd_pcm_oss_write, | |
3085 | .open = snd_pcm_oss_open, | |
3086 | .release = snd_pcm_oss_release, | |
02f4865f | 3087 | .llseek = no_llseek, |
1da177e4 LT |
3088 | .poll = snd_pcm_oss_poll, |
3089 | .unlocked_ioctl = snd_pcm_oss_ioctl, | |
3090 | .compat_ioctl = snd_pcm_oss_ioctl_compat, | |
3091 | .mmap = snd_pcm_oss_mmap, | |
3092 | }; | |
3093 | ||
6ac77bc1 | 3094 | static void register_oss_dsp(struct snd_pcm *pcm, int index) |
1da177e4 | 3095 | { |
1da177e4 | 3096 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
2af677fc | 3097 | pcm->card, index, &snd_pcm_oss_f_reg, |
80d7d771 | 3098 | pcm) < 0) { |
61efcee8 | 3099 | pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", |
d3d579f8 | 3100 | pcm->card->number, pcm->device); |
1da177e4 LT |
3101 | } |
3102 | } | |
3103 | ||
6ac77bc1 | 3104 | static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) |
1da177e4 LT |
3105 | { |
3106 | pcm->oss.reg = 0; | |
896e6cc2 | 3107 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
1da177e4 LT |
3108 | char name[128]; |
3109 | int duplex; | |
3110 | register_oss_dsp(pcm, 0); | |
3111 | duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && | |
3112 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && | |
3113 | !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); | |
3114 | sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); | |
3115 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO | |
3116 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, | |
3117 | pcm->card->number, | |
3118 | name); | |
3119 | #endif | |
3120 | pcm->oss.reg++; | |
3121 | pcm->oss.reg_mask |= 1; | |
3122 | } | |
896e6cc2 | 3123 | if (adsp_map[pcm->card->number] == (int)pcm->device) { |
1da177e4 LT |
3124 | register_oss_dsp(pcm, 1); |
3125 | pcm->oss.reg++; | |
3126 | pcm->oss.reg_mask |= 2; | |
3127 | } | |
3128 | ||
3129 | if (pcm->oss.reg) | |
3130 | snd_pcm_oss_proc_init(pcm); | |
3131 | ||
3132 | return 0; | |
3133 | } | |
3134 | ||
6ac77bc1 | 3135 | static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) |
1da177e4 LT |
3136 | { |
3137 | if (pcm->oss.reg) { | |
3138 | if (pcm->oss.reg_mask & 1) { | |
3139 | pcm->oss.reg_mask &= ~1; | |
3140 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, | |
3141 | pcm->card, 0); | |
3142 | } | |
3143 | if (pcm->oss.reg_mask & 2) { | |
3144 | pcm->oss.reg_mask &= ~2; | |
3145 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, | |
3146 | pcm->card, 1); | |
3147 | } | |
896e6cc2 | 3148 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
1da177e4 LT |
3149 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO |
3150 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); | |
3151 | #endif | |
3152 | } | |
3153 | pcm->oss.reg = 0; | |
1da177e4 LT |
3154 | } |
3155 | return 0; | |
3156 | } | |
3157 | ||
c461482c TI |
3158 | static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) |
3159 | { | |
3160 | snd_pcm_oss_disconnect_minor(pcm); | |
3161 | snd_pcm_oss_proc_done(pcm); | |
3162 | return 0; | |
3163 | } | |
3164 | ||
6ac77bc1 | 3165 | static struct snd_pcm_notify snd_pcm_oss_notify = |
1da177e4 LT |
3166 | { |
3167 | .n_register = snd_pcm_oss_register_minor, | |
3168 | .n_disconnect = snd_pcm_oss_disconnect_minor, | |
3169 | .n_unregister = snd_pcm_oss_unregister_minor, | |
3170 | }; | |
3171 | ||
3172 | static int __init alsa_pcm_oss_init(void) | |
3173 | { | |
3174 | int i; | |
3175 | int err; | |
3176 | ||
3177 | /* check device map table */ | |
3178 | for (i = 0; i < SNDRV_CARDS; i++) { | |
896e6cc2 | 3179 | if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { |
61efcee8 | 3180 | pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", |
d3d579f8 | 3181 | i, dsp_map[i]); |
1da177e4 LT |
3182 | dsp_map[i] = 0; |
3183 | } | |
896e6cc2 | 3184 | if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { |
61efcee8 | 3185 | pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", |
d3d579f8 | 3186 | i, adsp_map[i]); |
1da177e4 LT |
3187 | adsp_map[i] = 1; |
3188 | } | |
3189 | } | |
3190 | if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) | |
3191 | return err; | |
3192 | return 0; | |
3193 | } | |
3194 | ||
3195 | static void __exit alsa_pcm_oss_exit(void) | |
3196 | { | |
3197 | snd_pcm_notify(&snd_pcm_oss_notify, 1); | |
3198 | } | |
3199 | ||
3200 | module_init(alsa_pcm_oss_init) | |
3201 | module_exit(alsa_pcm_oss_exit) |