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irqchip/s3c24xx: Mark init_eint as __maybe_unused
[linux/fpc-iii.git] / sound / core / oss / pcm_oss.c
blob58550cc93f2805aa8627f9e3e4588c2838281926
1 /*
2 * Digital Audio (PCM) abstract layer / OSS compatible
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/time.h>
32 #include <linux/vmalloc.h>
33 #include <linux/module.h>
34 #include <linux/math64.h>
35 #include <linux/string.h>
36 #include <sound/core.h>
37 #include <sound/minors.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include "pcm_plugin.h"
41 #include <sound/info.h>
42 #include <linux/soundcard.h>
43 #include <sound/initval.h>
44 #include <sound/mixer_oss.h>
45
46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
48 static int dsp_map[SNDRV_CARDS];
49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50 static bool nonblock_open = 1;
51
52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54 MODULE_LICENSE("GPL");
55 module_param_array(dsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57 module_param_array(adsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59 module_param(nonblock_open, bool, 0644);
60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
64 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
67
68 static inline mm_segment_t snd_enter_user(void)
69 {
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73 }
74
75 static inline void snd_leave_user(mm_segment_t fs)
76 {
77 set_fs(fs);
78 }
79
80 /*
81 * helper functions to process hw_params
82 */
83 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84 {
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105 }
106
107 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108 {
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129 }
130
131 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132 {
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139 }
140
141 /**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149 static unsigned int
150 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152 {
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165 }
166
167 /**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175 static unsigned int
176 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178 {
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191 }
192
193 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196 {
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204 }
205
206 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210 {
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220 }
221
222 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225 {
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251 }
252
253 /**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269 {
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279 }
280
281 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284 {
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312 }
313
314 /**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330 {
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340 }
341
342 static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345 {
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356 }
357
358 static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360 {
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372 }
373
374 /* Return 1 if min is nearer to best than max */
375 static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378 {
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384 }
385
386 /**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404 {
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
456 if (max < 0) {
457 kfree(save);
458 return max;
459 }
460 last = 1;
461 }
462 _end:
463 kfree(save);
464 if (last)
465 v = snd_pcm_hw_param_last(pcm, params, var, dir);
466 else
467 v = snd_pcm_hw_param_first(pcm, params, var, dir);
468 snd_BUG_ON(v < 0);
469 return v;
470 }
471
472 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473 snd_pcm_hw_param_t var, unsigned int val,
474 int dir)
475 {
476 int changed;
477 if (hw_is_mask(var)) {
478 struct snd_mask *m = hw_param_mask(params, var);
479 if (val == 0 && dir < 0) {
480 changed = -EINVAL;
481 snd_mask_none(m);
482 } else {
483 if (dir > 0)
484 val++;
485 else if (dir < 0)
486 val--;
487 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488 }
489 } else if (hw_is_interval(var)) {
490 struct snd_interval *i = hw_param_interval(params, var);
491 if (val == 0 && dir < 0) {
492 changed = -EINVAL;
493 snd_interval_none(i);
494 } else if (dir == 0)
495 changed = snd_interval_refine_set(i, val);
496 else {
497 struct snd_interval t;
498 t.openmin = 1;
499 t.openmax = 1;
500 t.empty = 0;
501 t.integer = 0;
502 if (dir < 0) {
503 t.min = val - 1;
504 t.max = val;
505 } else {
506 t.min = val;
507 t.max = val+1;
508 }
509 changed = snd_interval_refine(i, &t);
510 }
511 } else
512 return -EINVAL;
513 if (changed) {
514 params->cmask |= 1 << var;
515 params->rmask |= 1 << var;
516 }
517 return changed;
518 }
519
520 /**
521 * snd_pcm_hw_param_set
522 * @pcm: PCM instance
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
525 * @val: value to set
526 * @dir: pointer to the direction (-1,0,1) or NULL
527 *
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
531 */
532 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533 struct snd_pcm_hw_params *params,
534 snd_pcm_hw_param_t var, unsigned int val,
535 int dir)
536 {
537 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
538 if (changed < 0)
539 return changed;
540 if (params->rmask) {
541 int err = snd_pcm_hw_refine(pcm, params);
542 if (err < 0)
543 return err;
544 }
545 return snd_pcm_hw_param_value(params, var, NULL);
546 }
547
548 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549 snd_pcm_hw_param_t var)
550 {
551 int changed;
552 changed = snd_interval_setinteger(hw_param_interval(params, var));
553 if (changed) {
554 params->cmask |= 1 << var;
555 params->rmask |= 1 << var;
556 }
557 return changed;
558 }
559
560 /*
561 * plugin
562 */
563
564 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
565 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
566 {
567 struct snd_pcm_runtime *runtime = substream->runtime;
568 struct snd_pcm_plugin *plugin, *next;
569
570 plugin = runtime->oss.plugin_first;
571 while (plugin) {
572 next = plugin->next;
573 snd_pcm_plugin_free(plugin);
574 plugin = next;
575 }
576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
577 return 0;
578 }
579
580 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
581 {
582 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
583 plugin->next = runtime->oss.plugin_first;
584 plugin->prev = NULL;
585 if (runtime->oss.plugin_first) {
586 runtime->oss.plugin_first->prev = plugin;
587 runtime->oss.plugin_first = plugin;
588 } else {
589 runtime->oss.plugin_last =
590 runtime->oss.plugin_first = plugin;
591 }
592 return 0;
593 }
594
595 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
596 {
597 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
598 plugin->next = NULL;
599 plugin->prev = runtime->oss.plugin_last;
600 if (runtime->oss.plugin_last) {
601 runtime->oss.plugin_last->next = plugin;
602 runtime->oss.plugin_last = plugin;
603 } else {
604 runtime->oss.plugin_last =
605 runtime->oss.plugin_first = plugin;
606 }
607 return 0;
608 }
609 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
610
611 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
612 {
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
615 long bytes = frames_to_bytes(runtime, frames);
616 if (buffer_size == runtime->oss.buffer_bytes)
617 return bytes;
618 #if BITS_PER_LONG >= 64
619 return runtime->oss.buffer_bytes * bytes / buffer_size;
620 #else
621 {
622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
623 return div_u64(bsize, buffer_size);
624 }
625 #endif
626 }
627
628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
629 {
630 struct snd_pcm_runtime *runtime = substream->runtime;
631 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
632 if (buffer_size == runtime->oss.buffer_bytes)
633 return bytes_to_frames(runtime, bytes);
634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
635 }
636
637 static inline
638 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
639 {
640 return runtime->hw_ptr_interrupt;
641 }
642
643 /* define extended formats in the recent OSS versions (if any) */
644 /* linear formats */
645 #define AFMT_S32_LE 0x00001000
646 #define AFMT_S32_BE 0x00002000
647 #define AFMT_S24_LE 0x00008000
648 #define AFMT_S24_BE 0x00010000
649 #define AFMT_S24_PACKED 0x00040000
650
651 /* other supported formats */
652 #define AFMT_FLOAT 0x00004000
653 #define AFMT_SPDIF_RAW 0x00020000
654
655 /* unsupported formats */
656 #define AFMT_AC3 0x00000400
657 #define AFMT_VORBIS 0x00000800
658
659 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
660 {
661 switch (format) {
662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
679 default: return SNDRV_PCM_FORMAT_U8;
680 }
681 }
682
683 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
684 {
685 switch (format) {
686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
703 default: return -EINVAL;
704 }
705 }
706
707 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
708 struct snd_pcm_hw_params *oss_params,
709 struct snd_pcm_hw_params *slave_params)
710 {
711 size_t s;
712 size_t oss_buffer_size, oss_period_size, oss_periods;
713 size_t min_period_size, max_period_size;
714 struct snd_pcm_runtime *runtime = substream->runtime;
715 size_t oss_frame_size;
716
717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718 params_channels(oss_params) / 8;
719
720 oss_buffer_size = snd_pcm_plug_client_size(substream,
721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
723 if (atomic_read(&substream->mmap_count)) {
724 if (oss_buffer_size > runtime->oss.mmap_bytes)
725 oss_buffer_size = runtime->oss.mmap_bytes;
726 }
727
728 if (substream->oss.setup.period_size > 16)
729 oss_period_size = substream->oss.setup.period_size;
730 else if (runtime->oss.fragshift) {
731 oss_period_size = 1 << runtime->oss.fragshift;
732 if (oss_period_size > oss_buffer_size / 2)
733 oss_period_size = oss_buffer_size / 2;
734 } else {
735 int sd;
736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
737
738 oss_period_size = oss_buffer_size;
739 do {
740 oss_period_size /= 2;
741 } while (oss_period_size > bytes_per_sec);
742 if (runtime->oss.subdivision == 0) {
743 sd = 4;
744 if (oss_period_size / sd > 4096)
745 sd *= 2;
746 if (oss_period_size / sd < 4096)
747 sd = 1;
748 } else
749 sd = runtime->oss.subdivision;
750 oss_period_size /= sd;
751 if (oss_period_size < 16)
752 oss_period_size = 16;
753 }
754
755 min_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 min_period_size *= oss_frame_size;
758 min_period_size = roundup_pow_of_two(min_period_size);
759 if (oss_period_size < min_period_size)
760 oss_period_size = min_period_size;
761
762 max_period_size = snd_pcm_plug_client_size(substream,
763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764 max_period_size *= oss_frame_size;
765 max_period_size = rounddown_pow_of_two(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
768
769 oss_periods = oss_buffer_size / oss_period_size;
770
771 if (substream->oss.setup.periods > 1)
772 oss_periods = substream->oss.setup.periods;
773
774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776 s = runtime->oss.maxfrags;
777 if (oss_periods > s)
778 oss_periods = s;
779
780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
781 if (s < 2)
782 s = 2;
783 if (oss_periods < s)
784 oss_periods = s;
785
786 while (oss_period_size * oss_periods > oss_buffer_size)
787 oss_period_size /= 2;
788
789 if (oss_period_size < 16)
790 return -EINVAL;
791 runtime->oss.period_bytes = oss_period_size;
792 runtime->oss.period_frames = 1;
793 runtime->oss.periods = oss_periods;
794 return 0;
795 }
796
797 static int choose_rate(struct snd_pcm_substream *substream,
798 struct snd_pcm_hw_params *params, unsigned int best_rate)
799 {
800 struct snd_interval *it;
801 struct snd_pcm_hw_params *save;
802 unsigned int rate, prev;
803
804 save = kmalloc(sizeof(*save), GFP_KERNEL);
805 if (save == NULL)
806 return -ENOMEM;
807 *save = *params;
808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
809
810 /* try multiples of the best rate */
811 rate = best_rate;
812 for (;;) {
813 if (it->max < rate || (it->max == rate && it->openmax))
814 break;
815 if (it->min < rate || (it->min == rate && !it->openmin)) {
816 int ret;
817 ret = snd_pcm_hw_param_set(substream, params,
818 SNDRV_PCM_HW_PARAM_RATE,
819 rate, 0);
820 if (ret == (int)rate) {
821 kfree(save);
822 return rate;
823 }
824 *params = *save;
825 }
826 prev = rate;
827 rate += best_rate;
828 if (rate <= prev)
829 break;
830 }
831
832 /* not found, use the nearest rate */
833 kfree(save);
834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
835 }
836
837 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
838 {
839 struct snd_pcm_runtime *runtime = substream->runtime;
840 struct snd_pcm_hw_params *params, *sparams;
841 struct snd_pcm_sw_params *sw_params;
842 ssize_t oss_buffer_size, oss_period_size;
843 size_t oss_frame_size;
844 int err;
845 int direct;
846 snd_pcm_format_t format, sformat;
847 int n;
848 struct snd_mask sformat_mask;
849 struct snd_mask mask;
850
851 if (mutex_lock_interruptible(&runtime->oss.params_lock))
852 return -EINTR;
853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854 params = kmalloc(sizeof(*params), GFP_KERNEL);
855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856 if (!sw_params || !params || !sparams) {
857 err = -ENOMEM;
858 goto failure;
859 }
860
861 if (atomic_read(&substream->mmap_count))
862 direct = 1;
863 else
864 direct = substream->oss.setup.direct;
865
866 _snd_pcm_hw_params_any(sparams);
867 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
868 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
869 snd_mask_none(&mask);
870 if (atomic_read(&substream->mmap_count))
871 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
872 else {
873 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
874 if (!direct)
875 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
876 }
877 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
878 if (err < 0) {
879 pcm_dbg(substream->pcm, "No usable accesses\n");
880 err = -EINVAL;
881 goto failure;
882 }
883 choose_rate(substream, sparams, runtime->oss.rate);
884 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
885
886 format = snd_pcm_oss_format_from(runtime->oss.format);
887
888 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
889 if (direct)
890 sformat = format;
891 else
892 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
893
894 if ((__force int)sformat < 0 ||
895 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
896 for (sformat = (__force snd_pcm_format_t)0;
897 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
898 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
899 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
900 snd_pcm_oss_format_to(sformat) >= 0)
901 break;
902 }
903 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
904 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
905 err = -EINVAL;
906 goto failure;
907 }
908 }
909 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
910 if (err < 0)
911 goto failure;
912
913 if (direct) {
914 memcpy(params, sparams, sizeof(*params));
915 } else {
916 _snd_pcm_hw_params_any(params);
917 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
918 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
919 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
920 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
921 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
922 runtime->oss.channels, 0);
923 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
924 runtime->oss.rate, 0);
925 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
926 params_access(params), params_format(params),
927 params_channels(params), params_rate(params));
928 }
929 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
930 params_access(sparams), params_format(sparams),
931 params_channels(sparams), params_rate(sparams));
932
933 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
934 params_channels(params) / 8;
935
936 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
937 snd_pcm_oss_plugin_clear(substream);
938 if (!direct) {
939 /* add necessary plugins */
940 snd_pcm_oss_plugin_clear(substream);
941 if ((err = snd_pcm_plug_format_plugins(substream,
942 params,
943 sparams)) < 0) {
944 pcm_dbg(substream->pcm,
945 "snd_pcm_plug_format_plugins failed: %i\n", err);
946 snd_pcm_oss_plugin_clear(substream);
947 goto failure;
948 }
949 if (runtime->oss.plugin_first) {
950 struct snd_pcm_plugin *plugin;
951 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
952 pcm_dbg(substream->pcm,
953 "snd_pcm_plugin_build_io failed: %i\n", err);
954 snd_pcm_oss_plugin_clear(substream);
955 goto failure;
956 }
957 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
958 err = snd_pcm_plugin_append(plugin);
959 } else {
960 err = snd_pcm_plugin_insert(plugin);
961 }
962 if (err < 0) {
963 snd_pcm_oss_plugin_clear(substream);
964 goto failure;
965 }
966 }
967 }
968 #endif
969
970 err = snd_pcm_oss_period_size(substream, params, sparams);
971 if (err < 0)
972 goto failure;
973
974 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
975 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
976 if (err < 0)
977 goto failure;
978
979 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
980 runtime->oss.periods, NULL);
981 if (err < 0)
982 goto failure;
983
984 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
985
986 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
987 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
988 goto failure;
989 }
990
991 memset(sw_params, 0, sizeof(*sw_params));
992 if (runtime->oss.trigger) {
993 sw_params->start_threshold = 1;
994 } else {
995 sw_params->start_threshold = runtime->boundary;
996 }
997 if (atomic_read(&substream->mmap_count) ||
998 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
999 sw_params->stop_threshold = runtime->boundary;
1000 else
1001 sw_params->stop_threshold = runtime->buffer_size;
1002 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1003 sw_params->period_step = 1;
1004 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1005 1 : runtime->period_size;
1006 if (atomic_read(&substream->mmap_count) ||
1007 substream->oss.setup.nosilence) {
1008 sw_params->silence_threshold = 0;
1009 sw_params->silence_size = 0;
1010 } else {
1011 snd_pcm_uframes_t frames;
1012 frames = runtime->period_size + 16;
1013 if (frames > runtime->buffer_size)
1014 frames = runtime->buffer_size;
1015 sw_params->silence_threshold = frames;
1016 sw_params->silence_size = frames;
1017 }
1018
1019 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1020 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1021 goto failure;
1022 }
1023
1024 runtime->oss.periods = params_periods(sparams);
1025 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1026 if (oss_period_size < 0) {
1027 err = -EINVAL;
1028 goto failure;
1029 }
1030 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1031 if (runtime->oss.plugin_first) {
1032 err = snd_pcm_plug_alloc(substream, oss_period_size);
1033 if (err < 0)
1034 goto failure;
1035 }
1036 #endif
1037 oss_period_size *= oss_frame_size;
1038
1039 oss_buffer_size = oss_period_size * runtime->oss.periods;
1040 if (oss_buffer_size < 0) {
1041 err = -EINVAL;
1042 goto failure;
1043 }
1044
1045 runtime->oss.period_bytes = oss_period_size;
1046 runtime->oss.buffer_bytes = oss_buffer_size;
1047
1048 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1049 runtime->oss.period_bytes,
1050 runtime->oss.buffer_bytes);
1051 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1052 params_period_size(sparams),
1053 params_buffer_size(sparams));
1054
1055 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1056 runtime->oss.channels = params_channels(params);
1057 runtime->oss.rate = params_rate(params);
1058
1059 vfree(runtime->oss.buffer);
1060 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
1061 if (!runtime->oss.buffer) {
1062 err = -ENOMEM;
1063 goto failure;
1064 }
1065
1066 runtime->oss.params = 0;
1067 runtime->oss.prepare = 1;
1068 runtime->oss.buffer_used = 0;
1069 if (runtime->dma_area)
1070 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1071
1072 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1073
1074 err = 0;
1075 failure:
1076 kfree(sw_params);
1077 kfree(params);
1078 kfree(sparams);
1079 mutex_unlock(&runtime->oss.params_lock);
1080 return err;
1081 }
1082
1083 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1084 {
1085 int idx, err;
1086 struct snd_pcm_substream *asubstream = NULL, *substream;
1087
1088 for (idx = 0; idx < 2; idx++) {
1089 substream = pcm_oss_file->streams[idx];
1090 if (substream == NULL)
1091 continue;
1092 if (asubstream == NULL)
1093 asubstream = substream;
1094 if (substream->runtime->oss.params) {
1095 err = snd_pcm_oss_change_params(substream);
1096 if (err < 0)
1097 return err;
1098 }
1099 }
1100 if (!asubstream)
1101 return -EIO;
1102 if (r_substream)
1103 *r_substream = asubstream;
1104 return 0;
1105 }
1106
1107 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1108 {
1109 int err;
1110 struct snd_pcm_runtime *runtime = substream->runtime;
1111
1112 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1113 if (err < 0) {
1114 pcm_dbg(substream->pcm,
1115 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1116 return err;
1117 }
1118 runtime->oss.prepare = 0;
1119 runtime->oss.prev_hw_ptr_period = 0;
1120 runtime->oss.period_ptr = 0;
1121 runtime->oss.buffer_used = 0;
1122
1123 return 0;
1124 }
1125
1126 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1127 {
1128 struct snd_pcm_runtime *runtime;
1129 int err;
1130
1131 if (substream == NULL)
1132 return 0;
1133 runtime = substream->runtime;
1134 if (runtime->oss.params) {
1135 err = snd_pcm_oss_change_params(substream);
1136 if (err < 0)
1137 return err;
1138 }
1139 if (runtime->oss.prepare) {
1140 err = snd_pcm_oss_prepare(substream);
1141 if (err < 0)
1142 return err;
1143 }
1144 return 0;
1145 }
1146
1147 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1148 {
1149 struct snd_pcm_runtime *runtime;
1150 snd_pcm_uframes_t frames;
1151 int err = 0;
1152
1153 while (1) {
1154 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1155 if (err < 0)
1156 break;
1157 runtime = substream->runtime;
1158 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1159 break;
1160 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1161 /* until avail(delay) <= buffer_size */
1162 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1163 frames /= runtime->period_size;
1164 frames *= runtime->period_size;
1165 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1166 if (err < 0)
1167 break;
1168 }
1169 return err;
1170 }
1171
1172 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1173 {
1174 struct snd_pcm_runtime *runtime = substream->runtime;
1175 int ret;
1176 while (1) {
1177 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1178 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1179 #ifdef OSS_DEBUG
1180 pcm_dbg(substream->pcm,
1181 "pcm_oss: write: recovering from %s\n",
1182 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1183 "XRUN" : "SUSPEND");
1184 #endif
1185 ret = snd_pcm_oss_prepare(substream);
1186 if (ret < 0)
1187 break;
1188 }
1189 if (in_kernel) {
1190 mm_segment_t fs;
1191 fs = snd_enter_user();
1192 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1193 snd_leave_user(fs);
1194 } else {
1195 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1196 }
1197 if (ret != -EPIPE && ret != -ESTRPIPE)
1198 break;
1199 /* test, if we can't store new data, because the stream */
1200 /* has not been started */
1201 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202 return -EAGAIN;
1203 }
1204 return ret;
1205 }
1206
1207 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1208 {
1209 struct snd_pcm_runtime *runtime = substream->runtime;
1210 snd_pcm_sframes_t delay;
1211 int ret;
1212 while (1) {
1213 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215 #ifdef OSS_DEBUG
1216 pcm_dbg(substream->pcm,
1217 "pcm_oss: read: recovering from %s\n",
1218 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1219 "XRUN" : "SUSPEND");
1220 #endif
1221 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1222 if (ret < 0)
1223 break;
1224 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1225 ret = snd_pcm_oss_prepare(substream);
1226 if (ret < 0)
1227 break;
1228 }
1229 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1230 if (ret < 0)
1231 break;
1232 if (in_kernel) {
1233 mm_segment_t fs;
1234 fs = snd_enter_user();
1235 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1236 snd_leave_user(fs);
1237 } else {
1238 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1239 }
1240 if (ret == -EPIPE) {
1241 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1242 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1243 if (ret < 0)
1244 break;
1245 }
1246 continue;
1247 }
1248 if (ret != -ESTRPIPE)
1249 break;
1250 }
1251 return ret;
1252 }
1253
1254 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1255 {
1256 struct snd_pcm_runtime *runtime = substream->runtime;
1257 int ret;
1258 while (1) {
1259 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1260 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1261 #ifdef OSS_DEBUG
1262 pcm_dbg(substream->pcm,
1263 "pcm_oss: writev: recovering from %s\n",
1264 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1265 "XRUN" : "SUSPEND");
1266 #endif
1267 ret = snd_pcm_oss_prepare(substream);
1268 if (ret < 0)
1269 break;
1270 }
1271 if (in_kernel) {
1272 mm_segment_t fs;
1273 fs = snd_enter_user();
1274 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1275 snd_leave_user(fs);
1276 } else {
1277 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1278 }
1279 if (ret != -EPIPE && ret != -ESTRPIPE)
1280 break;
1281
1282 /* test, if we can't store new data, because the stream */
1283 /* has not been started */
1284 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1285 return -EAGAIN;
1286 }
1287 return ret;
1288 }
1289
1290 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1291 {
1292 struct snd_pcm_runtime *runtime = substream->runtime;
1293 int ret;
1294 while (1) {
1295 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1296 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1297 #ifdef OSS_DEBUG
1298 pcm_dbg(substream->pcm,
1299 "pcm_oss: readv: recovering from %s\n",
1300 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1301 "XRUN" : "SUSPEND");
1302 #endif
1303 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1304 if (ret < 0)
1305 break;
1306 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1307 ret = snd_pcm_oss_prepare(substream);
1308 if (ret < 0)
1309 break;
1310 }
1311 if (in_kernel) {
1312 mm_segment_t fs;
1313 fs = snd_enter_user();
1314 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1315 snd_leave_user(fs);
1316 } else {
1317 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1318 }
1319 if (ret != -EPIPE && ret != -ESTRPIPE)
1320 break;
1321 }
1322 return ret;
1323 }
1324
1325 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1326 {
1327 struct snd_pcm_runtime *runtime = substream->runtime;
1328 snd_pcm_sframes_t frames, frames1;
1329 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1330 if (runtime->oss.plugin_first) {
1331 struct snd_pcm_plugin_channel *channels;
1332 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1333 if (!in_kernel) {
1334 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1335 return -EFAULT;
1336 buf = runtime->oss.buffer;
1337 }
1338 frames = bytes / oss_frame_bytes;
1339 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1340 if (frames1 < 0)
1341 return frames1;
1342 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1343 if (frames1 <= 0)
1344 return frames1;
1345 bytes = frames1 * oss_frame_bytes;
1346 } else
1347 #endif
1348 {
1349 frames = bytes_to_frames(runtime, bytes);
1350 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1351 if (frames1 <= 0)
1352 return frames1;
1353 bytes = frames_to_bytes(runtime, frames1);
1354 }
1355 return bytes;
1356 }
1357
1358 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1359 {
1360 size_t xfer = 0;
1361 ssize_t tmp;
1362 struct snd_pcm_runtime *runtime = substream->runtime;
1363
1364 if (atomic_read(&substream->mmap_count))
1365 return -ENXIO;
1366
1367 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1368 return tmp;
1369 mutex_lock(&runtime->oss.params_lock);
1370 while (bytes > 0) {
1371 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1372 tmp = bytes;
1373 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1374 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1375 if (tmp > 0) {
1376 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1377 tmp = -EFAULT;
1378 goto err;
1379 }
1380 }
1381 runtime->oss.buffer_used += tmp;
1382 buf += tmp;
1383 bytes -= tmp;
1384 xfer += tmp;
1385 if (substream->oss.setup.partialfrag ||
1386 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1387 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1388 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1389 if (tmp <= 0)
1390 goto err;
1391 runtime->oss.bytes += tmp;
1392 runtime->oss.period_ptr += tmp;
1393 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1394 if (runtime->oss.period_ptr == 0 ||
1395 runtime->oss.period_ptr == runtime->oss.buffer_used)
1396 runtime->oss.buffer_used = 0;
1397 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1398 tmp = -EAGAIN;
1399 goto err;
1400 }
1401 }
1402 } else {
1403 tmp = snd_pcm_oss_write2(substream,
1404 (const char __force *)buf,
1405 runtime->oss.period_bytes, 0);
1406 if (tmp <= 0)
1407 goto err;
1408 runtime->oss.bytes += tmp;
1409 buf += tmp;
1410 bytes -= tmp;
1411 xfer += tmp;
1412 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1413 tmp != runtime->oss.period_bytes)
1414 break;
1415 }
1416 }
1417 mutex_unlock(&runtime->oss.params_lock);
1418 return xfer;
1419
1420 err:
1421 mutex_unlock(&runtime->oss.params_lock);
1422 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1423 }
1424
1425 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1426 {
1427 struct snd_pcm_runtime *runtime = substream->runtime;
1428 snd_pcm_sframes_t frames, frames1;
1429 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1430 char __user *final_dst = (char __force __user *)buf;
1431 if (runtime->oss.plugin_first) {
1432 struct snd_pcm_plugin_channel *channels;
1433 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1434 if (!in_kernel)
1435 buf = runtime->oss.buffer;
1436 frames = bytes / oss_frame_bytes;
1437 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1438 if (frames1 < 0)
1439 return frames1;
1440 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1441 if (frames1 <= 0)
1442 return frames1;
1443 bytes = frames1 * oss_frame_bytes;
1444 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1445 return -EFAULT;
1446 } else
1447 #endif
1448 {
1449 frames = bytes_to_frames(runtime, bytes);
1450 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1451 if (frames1 <= 0)
1452 return frames1;
1453 bytes = frames_to_bytes(runtime, frames1);
1454 }
1455 return bytes;
1456 }
1457
1458 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1459 {
1460 size_t xfer = 0;
1461 ssize_t tmp;
1462 struct snd_pcm_runtime *runtime = substream->runtime;
1463
1464 if (atomic_read(&substream->mmap_count))
1465 return -ENXIO;
1466
1467 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1468 return tmp;
1469 mutex_lock(&runtime->oss.params_lock);
1470 while (bytes > 0) {
1471 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1472 if (runtime->oss.buffer_used == 0) {
1473 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1474 if (tmp <= 0)
1475 goto err;
1476 runtime->oss.bytes += tmp;
1477 runtime->oss.period_ptr = tmp;
1478 runtime->oss.buffer_used = tmp;
1479 }
1480 tmp = bytes;
1481 if ((size_t) tmp > runtime->oss.buffer_used)
1482 tmp = runtime->oss.buffer_used;
1483 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1484 tmp = -EFAULT;
1485 goto err;
1486 }
1487 buf += tmp;
1488 bytes -= tmp;
1489 xfer += tmp;
1490 runtime->oss.buffer_used -= tmp;
1491 } else {
1492 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1493 runtime->oss.period_bytes, 0);
1494 if (tmp <= 0)
1495 goto err;
1496 runtime->oss.bytes += tmp;
1497 buf += tmp;
1498 bytes -= tmp;
1499 xfer += tmp;
1500 }
1501 }
1502 mutex_unlock(&runtime->oss.params_lock);
1503 return xfer;
1504
1505 err:
1506 mutex_unlock(&runtime->oss.params_lock);
1507 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1508 }
1509
1510 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1511 {
1512 struct snd_pcm_substream *substream;
1513 struct snd_pcm_runtime *runtime;
1514 int i;
1515
1516 for (i = 0; i < 2; i++) {
1517 substream = pcm_oss_file->streams[i];
1518 if (!substream)
1519 continue;
1520 runtime = substream->runtime;
1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1522 runtime->oss.prepare = 1;
1523 runtime->oss.buffer_used = 0;
1524 runtime->oss.prev_hw_ptr_period = 0;
1525 runtime->oss.period_ptr = 0;
1526 }
1527 return 0;
1528 }
1529
1530 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1531 {
1532 struct snd_pcm_substream *substream;
1533 int err;
1534
1535 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1536 if (substream != NULL) {
1537 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1538 return err;
1539 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1540 }
1541 /* note: all errors from the start action are ignored */
1542 /* OSS apps do not know, how to handle them */
1543 return 0;
1544 }
1545
1546 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1547 {
1548 struct snd_pcm_runtime *runtime;
1549 ssize_t result = 0;
1550 snd_pcm_state_t state;
1551 long res;
1552 wait_queue_t wait;
1553
1554 runtime = substream->runtime;
1555 init_waitqueue_entry(&wait, current);
1556 add_wait_queue(&runtime->sleep, &wait);
1557 #ifdef OSS_DEBUG
1558 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1559 #endif
1560 while (1) {
1561 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1562 if (result > 0) {
1563 runtime->oss.buffer_used = 0;
1564 result = 0;
1565 break;
1566 }
1567 if (result != 0 && result != -EAGAIN)
1568 break;
1569 result = 0;
1570 set_current_state(TASK_INTERRUPTIBLE);
1571 snd_pcm_stream_lock_irq(substream);
1572 state = runtime->status->state;
1573 snd_pcm_stream_unlock_irq(substream);
1574 if (state != SNDRV_PCM_STATE_RUNNING) {
1575 set_current_state(TASK_RUNNING);
1576 break;
1577 }
1578 res = schedule_timeout(10 * HZ);
1579 if (signal_pending(current)) {
1580 result = -ERESTARTSYS;
1581 break;
1582 }
1583 if (res == 0) {
1584 pcm_err(substream->pcm,
1585 "OSS sync error - DMA timeout\n");
1586 result = -EIO;
1587 break;
1588 }
1589 }
1590 remove_wait_queue(&runtime->sleep, &wait);
1591 return result;
1592 }
1593
1594 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1595 {
1596 int err = 0;
1597 unsigned int saved_f_flags;
1598 struct snd_pcm_substream *substream;
1599 struct snd_pcm_runtime *runtime;
1600 snd_pcm_format_t format;
1601 unsigned long width;
1602 size_t size;
1603
1604 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1605 if (substream != NULL) {
1606 runtime = substream->runtime;
1607 if (atomic_read(&substream->mmap_count))
1608 goto __direct;
1609 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1610 return err;
1611 format = snd_pcm_oss_format_from(runtime->oss.format);
1612 width = snd_pcm_format_physical_width(format);
1613 mutex_lock(&runtime->oss.params_lock);
1614 if (runtime->oss.buffer_used > 0) {
1615 #ifdef OSS_DEBUG
1616 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1617 #endif
1618 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1619 snd_pcm_format_set_silence(format,
1620 runtime->oss.buffer + runtime->oss.buffer_used,
1621 size);
1622 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1623 if (err < 0) {
1624 mutex_unlock(&runtime->oss.params_lock);
1625 return err;
1626 }
1627 } else if (runtime->oss.period_ptr > 0) {
1628 #ifdef OSS_DEBUG
1629 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1630 #endif
1631 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1632 snd_pcm_format_set_silence(format,
1633 runtime->oss.buffer,
1634 size * 8 / width);
1635 err = snd_pcm_oss_sync1(substream, size);
1636 if (err < 0) {
1637 mutex_unlock(&runtime->oss.params_lock);
1638 return err;
1639 }
1640 }
1641 /*
1642 * The ALSA's period might be a bit large than OSS one.
1643 * Fill the remain portion of ALSA period with zeros.
1644 */
1645 size = runtime->control->appl_ptr % runtime->period_size;
1646 if (size > 0) {
1647 size = runtime->period_size - size;
1648 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1649 size = (runtime->frame_bits * size) / 8;
1650 while (size > 0) {
1651 mm_segment_t fs;
1652 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1653 size -= size1;
1654 size1 *= 8;
1655 size1 /= runtime->sample_bits;
1656 snd_pcm_format_set_silence(runtime->format,
1657 runtime->oss.buffer,
1658 size1);
1659 size1 /= runtime->channels; /* frames */
1660 fs = snd_enter_user();
1661 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1662 snd_leave_user(fs);
1663 }
1664 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1665 void __user *buffers[runtime->channels];
1666 memset(buffers, 0, runtime->channels * sizeof(void *));
1667 snd_pcm_lib_writev(substream, buffers, size);
1668 }
1669 }
1670 mutex_unlock(&runtime->oss.params_lock);
1671 /*
1672 * finish sync: drain the buffer
1673 */
1674 __direct:
1675 saved_f_flags = substream->f_flags;
1676 substream->f_flags &= ~O_NONBLOCK;
1677 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1678 substream->f_flags = saved_f_flags;
1679 if (err < 0)
1680 return err;
1681 runtime->oss.prepare = 1;
1682 }
1683
1684 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1685 if (substream != NULL) {
1686 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1687 return err;
1688 runtime = substream->runtime;
1689 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1690 if (err < 0)
1691 return err;
1692 runtime->oss.buffer_used = 0;
1693 runtime->oss.prepare = 1;
1694 }
1695 return 0;
1696 }
1697
1698 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1699 {
1700 int idx;
1701
1702 for (idx = 1; idx >= 0; --idx) {
1703 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1704 struct snd_pcm_runtime *runtime;
1705 if (substream == NULL)
1706 continue;
1707 runtime = substream->runtime;
1708 if (rate < 1000)
1709 rate = 1000;
1710 else if (rate > 192000)
1711 rate = 192000;
1712 if (runtime->oss.rate != rate) {
1713 runtime->oss.params = 1;
1714 runtime->oss.rate = rate;
1715 }
1716 }
1717 return snd_pcm_oss_get_rate(pcm_oss_file);
1718 }
1719
1720 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1721 {
1722 struct snd_pcm_substream *substream;
1723 int err;
1724
1725 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1726 return err;
1727 return substream->runtime->oss.rate;
1728 }
1729
1730 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1731 {
1732 int idx;
1733 if (channels < 1)
1734 channels = 1;
1735 if (channels > 128)
1736 return -EINVAL;
1737 for (idx = 1; idx >= 0; --idx) {
1738 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1739 struct snd_pcm_runtime *runtime;
1740 if (substream == NULL)
1741 continue;
1742 runtime = substream->runtime;
1743 if (runtime->oss.channels != channels) {
1744 runtime->oss.params = 1;
1745 runtime->oss.channels = channels;
1746 }
1747 }
1748 return snd_pcm_oss_get_channels(pcm_oss_file);
1749 }
1750
1751 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1752 {
1753 struct snd_pcm_substream *substream;
1754 int err;
1755
1756 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1757 return err;
1758 return substream->runtime->oss.channels;
1759 }
1760
1761 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1762 {
1763 struct snd_pcm_substream *substream;
1764 int err;
1765
1766 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1767 return err;
1768 return substream->runtime->oss.period_bytes;
1769 }
1770
1771 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1772 {
1773 struct snd_pcm_substream *substream;
1774 int err;
1775 int direct;
1776 struct snd_pcm_hw_params *params;
1777 unsigned int formats = 0;
1778 struct snd_mask format_mask;
1779 int fmt;
1780
1781 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1782 return err;
1783 if (atomic_read(&substream->mmap_count))
1784 direct = 1;
1785 else
1786 direct = substream->oss.setup.direct;
1787 if (!direct)
1788 return AFMT_MU_LAW | AFMT_U8 |
1789 AFMT_S16_LE | AFMT_S16_BE |
1790 AFMT_S8 | AFMT_U16_LE |
1791 AFMT_U16_BE |
1792 AFMT_S32_LE | AFMT_S32_BE |
1793 AFMT_S24_LE | AFMT_S24_BE |
1794 AFMT_S24_PACKED;
1795 params = kmalloc(sizeof(*params), GFP_KERNEL);
1796 if (!params)
1797 return -ENOMEM;
1798 _snd_pcm_hw_params_any(params);
1799 err = snd_pcm_hw_refine(substream, params);
1800 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1801 kfree(params);
1802 if (err < 0)
1803 return err;
1804 for (fmt = 0; fmt < 32; ++fmt) {
1805 if (snd_mask_test(&format_mask, fmt)) {
1806 int f = snd_pcm_oss_format_to(fmt);
1807 if (f >= 0)
1808 formats |= f;
1809 }
1810 }
1811 return formats;
1812 }
1813
1814 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1815 {
1816 int formats, idx;
1817
1818 if (format != AFMT_QUERY) {
1819 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1820 if (formats < 0)
1821 return formats;
1822 if (!(formats & format))
1823 format = AFMT_U8;
1824 for (idx = 1; idx >= 0; --idx) {
1825 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1826 struct snd_pcm_runtime *runtime;
1827 if (substream == NULL)
1828 continue;
1829 runtime = substream->runtime;
1830 if (runtime->oss.format != format) {
1831 runtime->oss.params = 1;
1832 runtime->oss.format = format;
1833 }
1834 }
1835 }
1836 return snd_pcm_oss_get_format(pcm_oss_file);
1837 }
1838
1839 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1840 {
1841 struct snd_pcm_substream *substream;
1842 int err;
1843
1844 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1845 return err;
1846 return substream->runtime->oss.format;
1847 }
1848
1849 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1850 {
1851 struct snd_pcm_runtime *runtime;
1852
1853 if (substream == NULL)
1854 return 0;
1855 runtime = substream->runtime;
1856 if (subdivide == 0) {
1857 subdivide = runtime->oss.subdivision;
1858 if (subdivide == 0)
1859 subdivide = 1;
1860 return subdivide;
1861 }
1862 if (runtime->oss.subdivision || runtime->oss.fragshift)
1863 return -EINVAL;
1864 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1865 subdivide != 8 && subdivide != 16)
1866 return -EINVAL;
1867 runtime->oss.subdivision = subdivide;
1868 runtime->oss.params = 1;
1869 return subdivide;
1870 }
1871
1872 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1873 {
1874 int err = -EINVAL, idx;
1875
1876 for (idx = 1; idx >= 0; --idx) {
1877 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1878 if (substream == NULL)
1879 continue;
1880 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1881 return err;
1882 }
1883 return err;
1884 }
1885
1886 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1887 {
1888 struct snd_pcm_runtime *runtime;
1889
1890 if (substream == NULL)
1891 return 0;
1892 runtime = substream->runtime;
1893 if (runtime->oss.subdivision || runtime->oss.fragshift)
1894 return -EINVAL;
1895 runtime->oss.fragshift = val & 0xffff;
1896 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1897 if (runtime->oss.fragshift < 4) /* < 16 */
1898 runtime->oss.fragshift = 4;
1899 if (runtime->oss.maxfrags < 2)
1900 runtime->oss.maxfrags = 2;
1901 runtime->oss.params = 1;
1902 return 0;
1903 }
1904
1905 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1906 {
1907 int err = -EINVAL, idx;
1908
1909 for (idx = 1; idx >= 0; --idx) {
1910 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1911 if (substream == NULL)
1912 continue;
1913 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1914 return err;
1915 }
1916 return err;
1917 }
1918
1919 static int snd_pcm_oss_nonblock(struct file * file)
1920 {
1921 spin_lock(&file->f_lock);
1922 file->f_flags |= O_NONBLOCK;
1923 spin_unlock(&file->f_lock);
1924 return 0;
1925 }
1926
1927 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1928 {
1929
1930 if (substream == NULL) {
1931 res &= ~DSP_CAP_DUPLEX;
1932 return res;
1933 }
1934 #ifdef DSP_CAP_MULTI
1935 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1936 if (substream->pstr->substream_count > 1)
1937 res |= DSP_CAP_MULTI;
1938 #endif
1939 /* DSP_CAP_REALTIME is set all times: */
1940 /* all ALSA drivers can return actual pointer in ring buffer */
1941 #if defined(DSP_CAP_REALTIME) && 0
1942 {
1943 struct snd_pcm_runtime *runtime = substream->runtime;
1944 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1945 res &= ~DSP_CAP_REALTIME;
1946 }
1947 #endif
1948 return res;
1949 }
1950
1951 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1952 {
1953 int result, idx;
1954
1955 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1956 for (idx = 0; idx < 2; idx++) {
1957 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1958 result = snd_pcm_oss_get_caps1(substream, result);
1959 }
1960 result |= 0x0001; /* revision - same as SB AWE 64 */
1961 return result;
1962 }
1963
1964 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1965 snd_pcm_uframes_t hw_ptr)
1966 {
1967 struct snd_pcm_runtime *runtime = substream->runtime;
1968 snd_pcm_uframes_t appl_ptr;
1969 appl_ptr = hw_ptr + runtime->buffer_size;
1970 appl_ptr %= runtime->boundary;
1971 runtime->control->appl_ptr = appl_ptr;
1972 }
1973
1974 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1975 {
1976 struct snd_pcm_runtime *runtime;
1977 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1978 int err, cmd;
1979
1980 #ifdef OSS_DEBUG
1981 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1982 #endif
1983
1984 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1985 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1986
1987 if (psubstream) {
1988 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1989 return err;
1990 }
1991 if (csubstream) {
1992 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1993 return err;
1994 }
1995 if (psubstream) {
1996 runtime = psubstream->runtime;
1997 if (trigger & PCM_ENABLE_OUTPUT) {
1998 if (runtime->oss.trigger)
1999 goto _skip1;
2000 if (atomic_read(&psubstream->mmap_count))
2001 snd_pcm_oss_simulate_fill(psubstream,
2002 get_hw_ptr_period(runtime));
2003 runtime->oss.trigger = 1;
2004 runtime->start_threshold = 1;
2005 cmd = SNDRV_PCM_IOCTL_START;
2006 } else {
2007 if (!runtime->oss.trigger)
2008 goto _skip1;
2009 runtime->oss.trigger = 0;
2010 runtime->start_threshold = runtime->boundary;
2011 cmd = SNDRV_PCM_IOCTL_DROP;
2012 runtime->oss.prepare = 1;
2013 }
2014 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2015 if (err < 0)
2016 return err;
2017 }
2018 _skip1:
2019 if (csubstream) {
2020 runtime = csubstream->runtime;
2021 if (trigger & PCM_ENABLE_INPUT) {
2022 if (runtime->oss.trigger)
2023 goto _skip2;
2024 runtime->oss.trigger = 1;
2025 runtime->start_threshold = 1;
2026 cmd = SNDRV_PCM_IOCTL_START;
2027 } else {
2028 if (!runtime->oss.trigger)
2029 goto _skip2;
2030 runtime->oss.trigger = 0;
2031 runtime->start_threshold = runtime->boundary;
2032 cmd = SNDRV_PCM_IOCTL_DROP;
2033 runtime->oss.prepare = 1;
2034 }
2035 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2036 if (err < 0)
2037 return err;
2038 }
2039 _skip2:
2040 return 0;
2041 }
2042
2043 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2044 {
2045 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2046 int result = 0;
2047
2048 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2049 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2050 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2051 result |= PCM_ENABLE_OUTPUT;
2052 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2053 result |= PCM_ENABLE_INPUT;
2054 return result;
2055 }
2056
2057 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2058 {
2059 struct snd_pcm_substream *substream;
2060 struct snd_pcm_runtime *runtime;
2061 snd_pcm_sframes_t delay;
2062 int err;
2063
2064 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2065 if (substream == NULL)
2066 return -EINVAL;
2067 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2068 return err;
2069 runtime = substream->runtime;
2070 if (runtime->oss.params || runtime->oss.prepare)
2071 return 0;
2072 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2073 if (err == -EPIPE)
2074 delay = 0; /* hack for broken OSS applications */
2075 else if (err < 0)
2076 return err;
2077 return snd_pcm_oss_bytes(substream, delay);
2078 }
2079
2080 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2081 {
2082 struct snd_pcm_substream *substream;
2083 struct snd_pcm_runtime *runtime;
2084 snd_pcm_sframes_t delay;
2085 int fixup;
2086 struct count_info info;
2087 int err;
2088
2089 if (_info == NULL)
2090 return -EFAULT;
2091 substream = pcm_oss_file->streams[stream];
2092 if (substream == NULL)
2093 return -EINVAL;
2094 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2095 return err;
2096 runtime = substream->runtime;
2097 if (runtime->oss.params || runtime->oss.prepare) {
2098 memset(&info, 0, sizeof(info));
2099 if (copy_to_user(_info, &info, sizeof(info)))
2100 return -EFAULT;
2101 return 0;
2102 }
2103 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2104 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2105 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2106 err = 0;
2107 delay = 0;
2108 fixup = 0;
2109 } else {
2110 fixup = runtime->oss.buffer_used;
2111 }
2112 } else {
2113 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2114 fixup = -runtime->oss.buffer_used;
2115 }
2116 if (err < 0)
2117 return err;
2118 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2119 if (atomic_read(&substream->mmap_count)) {
2120 snd_pcm_sframes_t n;
2121 delay = get_hw_ptr_period(runtime);
2122 n = delay - runtime->oss.prev_hw_ptr_period;
2123 if (n < 0)
2124 n += runtime->boundary;
2125 info.blocks = n / runtime->period_size;
2126 runtime->oss.prev_hw_ptr_period = delay;
2127 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2128 snd_pcm_oss_simulate_fill(substream, delay);
2129 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2130 } else {
2131 delay = snd_pcm_oss_bytes(substream, delay);
2132 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2133 if (substream->oss.setup.buggyptr)
2134 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2135 else
2136 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2137 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2138 } else {
2139 delay += fixup;
2140 info.blocks = delay / runtime->oss.period_bytes;
2141 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2142 }
2143 }
2144 if (copy_to_user(_info, &info, sizeof(info)))
2145 return -EFAULT;
2146 return 0;
2147 }
2148
2149 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2150 {
2151 struct snd_pcm_substream *substream;
2152 struct snd_pcm_runtime *runtime;
2153 snd_pcm_sframes_t avail;
2154 int fixup;
2155 struct audio_buf_info info;
2156 int err;
2157
2158 if (_info == NULL)
2159 return -EFAULT;
2160 substream = pcm_oss_file->streams[stream];
2161 if (substream == NULL)
2162 return -EINVAL;
2163 runtime = substream->runtime;
2164
2165 if (runtime->oss.params &&
2166 (err = snd_pcm_oss_change_params(substream)) < 0)
2167 return err;
2168
2169 info.fragsize = runtime->oss.period_bytes;
2170 info.fragstotal = runtime->periods;
2171 if (runtime->oss.prepare) {
2172 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2173 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2174 info.fragments = runtime->oss.periods;
2175 } else {
2176 info.bytes = 0;
2177 info.fragments = 0;
2178 }
2179 } else {
2180 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2181 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2182 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2183 avail = runtime->buffer_size;
2184 err = 0;
2185 fixup = 0;
2186 } else {
2187 avail = runtime->buffer_size - avail;
2188 fixup = -runtime->oss.buffer_used;
2189 }
2190 } else {
2191 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2192 fixup = runtime->oss.buffer_used;
2193 }
2194 if (err < 0)
2195 return err;
2196 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2197 info.fragments = info.bytes / runtime->oss.period_bytes;
2198 }
2199
2200 #ifdef OSS_DEBUG
2201 pcm_dbg(substream->pcm,
2202 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2203 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2204 #endif
2205 if (copy_to_user(_info, &info, sizeof(info)))
2206 return -EFAULT;
2207 return 0;
2208 }
2209
2210 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2211 {
2212 // it won't be probably implemented
2213 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2214 return -EINVAL;
2215 }
2216
2217 static const char *strip_task_path(const char *path)
2218 {
2219 const char *ptr, *ptrl = NULL;
2220 for (ptr = path; *ptr; ptr++) {
2221 if (*ptr == '/')
2222 ptrl = ptr + 1;
2223 }
2224 return ptrl;
2225 }
2226
2227 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2228 const char *task_name,
2229 struct snd_pcm_oss_setup *rsetup)
2230 {
2231 struct snd_pcm_oss_setup *setup;
2232
2233 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2234 do {
2235 for (setup = pcm->streams[stream].oss.setup_list; setup;
2236 setup = setup->next) {
2237 if (!strcmp(setup->task_name, task_name))
2238 goto out;
2239 }
2240 } while ((task_name = strip_task_path(task_name)) != NULL);
2241 out:
2242 if (setup)
2243 *rsetup = *setup;
2244 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2245 }
2246
2247 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2248 {
2249 struct snd_pcm_runtime *runtime;
2250 runtime = substream->runtime;
2251 vfree(runtime->oss.buffer);
2252 runtime->oss.buffer = NULL;
2253 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2254 snd_pcm_oss_plugin_clear(substream);
2255 #endif
2256 substream->oss.oss = 0;
2257 }
2258
2259 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2260 struct snd_pcm_oss_setup *setup,
2261 int minor)
2262 {
2263 struct snd_pcm_runtime *runtime;
2264
2265 substream->oss.oss = 1;
2266 substream->oss.setup = *setup;
2267 if (setup->nonblock)
2268 substream->f_flags |= O_NONBLOCK;
2269 else if (setup->block)
2270 substream->f_flags &= ~O_NONBLOCK;
2271 runtime = substream->runtime;
2272 runtime->oss.params = 1;
2273 runtime->oss.trigger = 1;
2274 runtime->oss.rate = 8000;
2275 mutex_init(&runtime->oss.params_lock);
2276 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2277 case SNDRV_MINOR_OSS_PCM_8:
2278 runtime->oss.format = AFMT_U8;
2279 break;
2280 case SNDRV_MINOR_OSS_PCM_16:
2281 runtime->oss.format = AFMT_S16_LE;
2282 break;
2283 default:
2284 runtime->oss.format = AFMT_MU_LAW;
2285 }
2286 runtime->oss.channels = 1;
2287 runtime->oss.fragshift = 0;
2288 runtime->oss.maxfrags = 0;
2289 runtime->oss.subdivision = 0;
2290 substream->pcm_release = snd_pcm_oss_release_substream;
2291 }
2292
2293 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2294 {
2295 int cidx;
2296 if (!pcm_oss_file)
2297 return 0;
2298 for (cidx = 0; cidx < 2; ++cidx) {
2299 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2300 if (substream)
2301 snd_pcm_release_substream(substream);
2302 }
2303 kfree(pcm_oss_file);
2304 return 0;
2305 }
2306
2307 static int snd_pcm_oss_open_file(struct file *file,
2308 struct snd_pcm *pcm,
2309 struct snd_pcm_oss_file **rpcm_oss_file,
2310 int minor,
2311 struct snd_pcm_oss_setup *setup)
2312 {
2313 int idx, err;
2314 struct snd_pcm_oss_file *pcm_oss_file;
2315 struct snd_pcm_substream *substream;
2316 fmode_t f_mode = file->f_mode;
2317
2318 if (rpcm_oss_file)
2319 *rpcm_oss_file = NULL;
2320
2321 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2322 if (pcm_oss_file == NULL)
2323 return -ENOMEM;
2324
2325 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2326 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2327 f_mode = FMODE_WRITE;
2328
2329 file->f_flags &= ~O_APPEND;
2330 for (idx = 0; idx < 2; idx++) {
2331 if (setup[idx].disable)
2332 continue;
2333 if (! pcm->streams[idx].substream_count)
2334 continue; /* no matching substream */
2335 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2336 if (! (f_mode & FMODE_WRITE))
2337 continue;
2338 } else {
2339 if (! (f_mode & FMODE_READ))
2340 continue;
2341 }
2342 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2343 if (err < 0) {
2344 snd_pcm_oss_release_file(pcm_oss_file);
2345 return err;
2346 }
2347
2348 pcm_oss_file->streams[idx] = substream;
2349 substream->file = pcm_oss_file;
2350 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2351 }
2352
2353 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2354 snd_pcm_oss_release_file(pcm_oss_file);
2355 return -EINVAL;
2356 }
2357
2358 file->private_data = pcm_oss_file;
2359 if (rpcm_oss_file)
2360 *rpcm_oss_file = pcm_oss_file;
2361 return 0;
2362 }
2363
2364
2365 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2366 {
2367 unsigned int idx;
2368
2369 if (snd_BUG_ON(!task || !name || size < 2))
2370 return -EINVAL;
2371 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2372 name[idx] = task->comm[idx];
2373 name[idx] = '\0';
2374 return 0;
2375 }
2376
2377 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2378 {
2379 int err;
2380 char task_name[32];
2381 struct snd_pcm *pcm;
2382 struct snd_pcm_oss_file *pcm_oss_file;
2383 struct snd_pcm_oss_setup setup[2];
2384 int nonblock;
2385 wait_queue_t wait;
2386
2387 err = nonseekable_open(inode, file);
2388 if (err < 0)
2389 return err;
2390
2391 pcm = snd_lookup_oss_minor_data(iminor(inode),
2392 SNDRV_OSS_DEVICE_TYPE_PCM);
2393 if (pcm == NULL) {
2394 err = -ENODEV;
2395 goto __error1;
2396 }
2397 err = snd_card_file_add(pcm->card, file);
2398 if (err < 0)
2399 goto __error1;
2400 if (!try_module_get(pcm->card->module)) {
2401 err = -EFAULT;
2402 goto __error2;
2403 }
2404 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2405 err = -EFAULT;
2406 goto __error;
2407 }
2408 memset(setup, 0, sizeof(setup));
2409 if (file->f_mode & FMODE_WRITE)
2410 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2411 task_name, &setup[0]);
2412 if (file->f_mode & FMODE_READ)
2413 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2414 task_name, &setup[1]);
2415
2416 nonblock = !!(file->f_flags & O_NONBLOCK);
2417 if (!nonblock)
2418 nonblock = nonblock_open;
2419
2420 init_waitqueue_entry(&wait, current);
2421 add_wait_queue(&pcm->open_wait, &wait);
2422 mutex_lock(&pcm->open_mutex);
2423 while (1) {
2424 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2425 iminor(inode), setup);
2426 if (err >= 0)
2427 break;
2428 if (err == -EAGAIN) {
2429 if (nonblock) {
2430 err = -EBUSY;
2431 break;
2432 }
2433 } else
2434 break;
2435 set_current_state(TASK_INTERRUPTIBLE);
2436 mutex_unlock(&pcm->open_mutex);
2437 schedule();
2438 mutex_lock(&pcm->open_mutex);
2439 if (pcm->card->shutdown) {
2440 err = -ENODEV;
2441 break;
2442 }
2443 if (signal_pending(current)) {
2444 err = -ERESTARTSYS;
2445 break;
2446 }
2447 }
2448 remove_wait_queue(&pcm->open_wait, &wait);
2449 mutex_unlock(&pcm->open_mutex);
2450 if (err < 0)
2451 goto __error;
2452 snd_card_unref(pcm->card);
2453 return err;
2454
2455 __error:
2456 module_put(pcm->card->module);
2457 __error2:
2458 snd_card_file_remove(pcm->card, file);
2459 __error1:
2460 if (pcm)
2461 snd_card_unref(pcm->card);
2462 return err;
2463 }
2464
2465 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2466 {
2467 struct snd_pcm *pcm;
2468 struct snd_pcm_substream *substream;
2469 struct snd_pcm_oss_file *pcm_oss_file;
2470
2471 pcm_oss_file = file->private_data;
2472 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2473 if (substream == NULL)
2474 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2475 if (snd_BUG_ON(!substream))
2476 return -ENXIO;
2477 pcm = substream->pcm;
2478 if (!pcm->card->shutdown)
2479 snd_pcm_oss_sync(pcm_oss_file);
2480 mutex_lock(&pcm->open_mutex);
2481 snd_pcm_oss_release_file(pcm_oss_file);
2482 mutex_unlock(&pcm->open_mutex);
2483 wake_up(&pcm->open_wait);
2484 module_put(pcm->card->module);
2485 snd_card_file_remove(pcm->card, file);
2486 return 0;
2487 }
2488
2489 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2490 {
2491 struct snd_pcm_oss_file *pcm_oss_file;
2492 int __user *p = (int __user *)arg;
2493 int res;
2494
2495 pcm_oss_file = file->private_data;
2496 if (cmd == OSS_GETVERSION)
2497 return put_user(SNDRV_OSS_VERSION, p);
2498 if (cmd == OSS_ALSAEMULVER)
2499 return put_user(1, p);
2500 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2501 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2502 struct snd_pcm_substream *substream;
2503 int idx;
2504 for (idx = 0; idx < 2; ++idx) {
2505 substream = pcm_oss_file->streams[idx];
2506 if (substream != NULL)
2507 break;
2508 }
2509 if (snd_BUG_ON(idx >= 2))
2510 return -ENXIO;
2511 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2512 }
2513 #endif
2514 if (((cmd >> 8) & 0xff) != 'P')
2515 return -EINVAL;
2516 #ifdef OSS_DEBUG
2517 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2518 #endif
2519 switch (cmd) {
2520 case SNDCTL_DSP_RESET:
2521 return snd_pcm_oss_reset(pcm_oss_file);
2522 case SNDCTL_DSP_SYNC:
2523 return snd_pcm_oss_sync(pcm_oss_file);
2524 case SNDCTL_DSP_SPEED:
2525 if (get_user(res, p))
2526 return -EFAULT;
2527 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2528 return res;
2529 return put_user(res, p);
2530 case SOUND_PCM_READ_RATE:
2531 res = snd_pcm_oss_get_rate(pcm_oss_file);
2532 if (res < 0)
2533 return res;
2534 return put_user(res, p);
2535 case SNDCTL_DSP_STEREO:
2536 if (get_user(res, p))
2537 return -EFAULT;
2538 res = res > 0 ? 2 : 1;
2539 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2540 return res;
2541 return put_user(--res, p);
2542 case SNDCTL_DSP_GETBLKSIZE:
2543 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2544 if (res < 0)
2545 return res;
2546 return put_user(res, p);
2547 case SNDCTL_DSP_SETFMT:
2548 if (get_user(res, p))
2549 return -EFAULT;
2550 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2551 if (res < 0)
2552 return res;
2553 return put_user(res, p);
2554 case SOUND_PCM_READ_BITS:
2555 res = snd_pcm_oss_get_format(pcm_oss_file);
2556 if (res < 0)
2557 return res;
2558 return put_user(res, p);
2559 case SNDCTL_DSP_CHANNELS:
2560 if (get_user(res, p))
2561 return -EFAULT;
2562 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2563 if (res < 0)
2564 return res;
2565 return put_user(res, p);
2566 case SOUND_PCM_READ_CHANNELS:
2567 res = snd_pcm_oss_get_channels(pcm_oss_file);
2568 if (res < 0)
2569 return res;
2570 return put_user(res, p);
2571 case SOUND_PCM_WRITE_FILTER:
2572 case SOUND_PCM_READ_FILTER:
2573 return -EIO;
2574 case SNDCTL_DSP_POST:
2575 return snd_pcm_oss_post(pcm_oss_file);
2576 case SNDCTL_DSP_SUBDIVIDE:
2577 if (get_user(res, p))
2578 return -EFAULT;
2579 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2580 if (res < 0)
2581 return res;
2582 return put_user(res, p);
2583 case SNDCTL_DSP_SETFRAGMENT:
2584 if (get_user(res, p))
2585 return -EFAULT;
2586 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2587 case SNDCTL_DSP_GETFMTS:
2588 res = snd_pcm_oss_get_formats(pcm_oss_file);
2589 if (res < 0)
2590 return res;
2591 return put_user(res, p);
2592 case SNDCTL_DSP_GETOSPACE:
2593 case SNDCTL_DSP_GETISPACE:
2594 return snd_pcm_oss_get_space(pcm_oss_file,
2595 cmd == SNDCTL_DSP_GETISPACE ?
2596 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2597 (struct audio_buf_info __user *) arg);
2598 case SNDCTL_DSP_NONBLOCK:
2599 return snd_pcm_oss_nonblock(file);
2600 case SNDCTL_DSP_GETCAPS:
2601 res = snd_pcm_oss_get_caps(pcm_oss_file);
2602 if (res < 0)
2603 return res;
2604 return put_user(res, p);
2605 case SNDCTL_DSP_GETTRIGGER:
2606 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2607 if (res < 0)
2608 return res;
2609 return put_user(res, p);
2610 case SNDCTL_DSP_SETTRIGGER:
2611 if (get_user(res, p))
2612 return -EFAULT;
2613 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2614 case SNDCTL_DSP_GETIPTR:
2615 case SNDCTL_DSP_GETOPTR:
2616 return snd_pcm_oss_get_ptr(pcm_oss_file,
2617 cmd == SNDCTL_DSP_GETIPTR ?
2618 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2619 (struct count_info __user *) arg);
2620 case SNDCTL_DSP_MAPINBUF:
2621 case SNDCTL_DSP_MAPOUTBUF:
2622 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2623 cmd == SNDCTL_DSP_MAPINBUF ?
2624 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2625 (struct buffmem_desc __user *) arg);
2626 case SNDCTL_DSP_SETSYNCRO:
2627 /* stop DMA now.. */
2628 return 0;
2629 case SNDCTL_DSP_SETDUPLEX:
2630 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2631 return 0;
2632 return -EIO;
2633 case SNDCTL_DSP_GETODELAY:
2634 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2635 if (res < 0) {
2636 /* it's for sure, some broken apps don't check for error codes */
2637 put_user(0, p);
2638 return res;
2639 }
2640 return put_user(res, p);
2641 case SNDCTL_DSP_PROFILE:
2642 return 0; /* silently ignore */
2643 default:
2644 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2645 }
2646 return -EINVAL;
2647 }
2648
2649 #ifdef CONFIG_COMPAT
2650 /* all compatible */
2651 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2652 #else
2653 #define snd_pcm_oss_ioctl_compat NULL
2654 #endif
2655
2656 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2657 {
2658 struct snd_pcm_oss_file *pcm_oss_file;
2659 struct snd_pcm_substream *substream;
2660
2661 pcm_oss_file = file->private_data;
2662 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2663 if (substream == NULL)
2664 return -ENXIO;
2665 substream->f_flags = file->f_flags & O_NONBLOCK;
2666 #ifndef OSS_DEBUG
2667 return snd_pcm_oss_read1(substream, buf, count);
2668 #else
2669 {
2670 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2671 pcm_dbg(substream->pcm,
2672 "pcm_oss: read %li bytes (returned %li bytes)\n",
2673 (long)count, (long)res);
2674 return res;
2675 }
2676 #endif
2677 }
2678
2679 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2680 {
2681 struct snd_pcm_oss_file *pcm_oss_file;
2682 struct snd_pcm_substream *substream;
2683 long result;
2684
2685 pcm_oss_file = file->private_data;
2686 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2687 if (substream == NULL)
2688 return -ENXIO;
2689 substream->f_flags = file->f_flags & O_NONBLOCK;
2690 result = snd_pcm_oss_write1(substream, buf, count);
2691 #ifdef OSS_DEBUG
2692 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2693 (long)count, (long)result);
2694 #endif
2695 return result;
2696 }
2697
2698 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2699 {
2700 struct snd_pcm_runtime *runtime = substream->runtime;
2701 if (atomic_read(&substream->mmap_count))
2702 return runtime->oss.prev_hw_ptr_period !=
2703 get_hw_ptr_period(runtime);
2704 else
2705 return snd_pcm_playback_avail(runtime) >=
2706 runtime->oss.period_frames;
2707 }
2708
2709 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2710 {
2711 struct snd_pcm_runtime *runtime = substream->runtime;
2712 if (atomic_read(&substream->mmap_count))
2713 return runtime->oss.prev_hw_ptr_period !=
2714 get_hw_ptr_period(runtime);
2715 else
2716 return snd_pcm_capture_avail(runtime) >=
2717 runtime->oss.period_frames;
2718 }
2719
2720 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2721 {
2722 struct snd_pcm_oss_file *pcm_oss_file;
2723 unsigned int mask;
2724 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2725
2726 pcm_oss_file = file->private_data;
2727
2728 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2729 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2730
2731 mask = 0;
2732 if (psubstream != NULL) {
2733 struct snd_pcm_runtime *runtime = psubstream->runtime;
2734 poll_wait(file, &runtime->sleep, wait);
2735 snd_pcm_stream_lock_irq(psubstream);
2736 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2737 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2738 snd_pcm_oss_playback_ready(psubstream)))
2739 mask |= POLLOUT | POLLWRNORM;
2740 snd_pcm_stream_unlock_irq(psubstream);
2741 }
2742 if (csubstream != NULL) {
2743 struct snd_pcm_runtime *runtime = csubstream->runtime;
2744 snd_pcm_state_t ostate;
2745 poll_wait(file, &runtime->sleep, wait);
2746 snd_pcm_stream_lock_irq(csubstream);
2747 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2748 snd_pcm_oss_capture_ready(csubstream))
2749 mask |= POLLIN | POLLRDNORM;
2750 snd_pcm_stream_unlock_irq(csubstream);
2751 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2752 struct snd_pcm_oss_file ofile;
2753 memset(&ofile, 0, sizeof(ofile));
2754 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2755 runtime->oss.trigger = 0;
2756 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2757 }
2758 }
2759
2760 return mask;
2761 }
2762
2763 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2764 {
2765 struct snd_pcm_oss_file *pcm_oss_file;
2766 struct snd_pcm_substream *substream = NULL;
2767 struct snd_pcm_runtime *runtime;
2768 int err;
2769
2770 #ifdef OSS_DEBUG
2771 pr_debug("pcm_oss: mmap begin\n");
2772 #endif
2773 pcm_oss_file = file->private_data;
2774 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2775 case VM_READ | VM_WRITE:
2776 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2777 if (substream)
2778 break;
2779 /* Fall through */
2780 case VM_READ:
2781 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2782 break;
2783 case VM_WRITE:
2784 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2785 break;
2786 default:
2787 return -EINVAL;
2788 }
2789 /* set VM_READ access as well to fix memset() routines that do
2790 reads before writes (to improve performance) */
2791 area->vm_flags |= VM_READ;
2792 if (substream == NULL)
2793 return -ENXIO;
2794 runtime = substream->runtime;
2795 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2796 return -EIO;
2797 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2798 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2799 else
2800 return -EIO;
2801
2802 if (runtime->oss.params) {
2803 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2804 return err;
2805 }
2806 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2807 if (runtime->oss.plugin_first != NULL)
2808 return -EIO;
2809 #endif
2810
2811 if (area->vm_pgoff != 0)
2812 return -EINVAL;
2813
2814 err = snd_pcm_mmap_data(substream, file, area);
2815 if (err < 0)
2816 return err;
2817 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2818 runtime->silence_threshold = 0;
2819 runtime->silence_size = 0;
2820 #ifdef OSS_DEBUG
2821 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2822 runtime->oss.mmap_bytes);
2823 #endif
2824 /* In mmap mode we never stop */
2825 runtime->stop_threshold = runtime->boundary;
2826
2827 return 0;
2828 }
2829
2830 #ifdef CONFIG_SND_VERBOSE_PROCFS
2831 /*
2832 * /proc interface
2833 */
2834
2835 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2836 struct snd_info_buffer *buffer)
2837 {
2838 struct snd_pcm_str *pstr = entry->private_data;
2839 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2840 mutex_lock(&pstr->oss.setup_mutex);
2841 while (setup) {
2842 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2843 setup->task_name,
2844 setup->periods,
2845 setup->period_size,
2846 setup->disable ? " disable" : "",
2847 setup->direct ? " direct" : "",
2848 setup->block ? " block" : "",
2849 setup->nonblock ? " non-block" : "",
2850 setup->partialfrag ? " partial-frag" : "",
2851 setup->nosilence ? " no-silence" : "");
2852 setup = setup->next;
2853 }
2854 mutex_unlock(&pstr->oss.setup_mutex);
2855 }
2856
2857 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2858 {
2859 struct snd_pcm_oss_setup *setup, *setupn;
2860
2861 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2862 setup; setup = setupn) {
2863 setupn = setup->next;
2864 kfree(setup->task_name);
2865 kfree(setup);
2866 }
2867 pstr->oss.setup_list = NULL;
2868 }
2869
2870 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2871 struct snd_info_buffer *buffer)
2872 {
2873 struct snd_pcm_str *pstr = entry->private_data;
2874 char line[128], str[32], task_name[32];
2875 const char *ptr;
2876 int idx1;
2877 struct snd_pcm_oss_setup *setup, *setup1, template;
2878
2879 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2880 mutex_lock(&pstr->oss.setup_mutex);
2881 memset(&template, 0, sizeof(template));
2882 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2883 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2884 snd_pcm_oss_proc_free_setup_list(pstr);
2885 mutex_unlock(&pstr->oss.setup_mutex);
2886 continue;
2887 }
2888 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2889 if (!strcmp(setup->task_name, task_name)) {
2890 template = *setup;
2891 break;
2892 }
2893 }
2894 ptr = snd_info_get_str(str, ptr, sizeof(str));
2895 template.periods = simple_strtoul(str, NULL, 10);
2896 ptr = snd_info_get_str(str, ptr, sizeof(str));
2897 template.period_size = simple_strtoul(str, NULL, 10);
2898 for (idx1 = 31; idx1 >= 0; idx1--)
2899 if (template.period_size & (1 << idx1))
2900 break;
2901 for (idx1--; idx1 >= 0; idx1--)
2902 template.period_size &= ~(1 << idx1);
2903 do {
2904 ptr = snd_info_get_str(str, ptr, sizeof(str));
2905 if (!strcmp(str, "disable")) {
2906 template.disable = 1;
2907 } else if (!strcmp(str, "direct")) {
2908 template.direct = 1;
2909 } else if (!strcmp(str, "block")) {
2910 template.block = 1;
2911 } else if (!strcmp(str, "non-block")) {
2912 template.nonblock = 1;
2913 } else if (!strcmp(str, "partial-frag")) {
2914 template.partialfrag = 1;
2915 } else if (!strcmp(str, "no-silence")) {
2916 template.nosilence = 1;
2917 } else if (!strcmp(str, "buggy-ptr")) {
2918 template.buggyptr = 1;
2919 }
2920 } while (*str);
2921 if (setup == NULL) {
2922 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2923 if (! setup) {
2924 buffer->error = -ENOMEM;
2925 mutex_unlock(&pstr->oss.setup_mutex);
2926 return;
2927 }
2928 if (pstr->oss.setup_list == NULL)
2929 pstr->oss.setup_list = setup;
2930 else {
2931 for (setup1 = pstr->oss.setup_list;
2932 setup1->next; setup1 = setup1->next);
2933 setup1->next = setup;
2934 }
2935 template.task_name = kstrdup(task_name, GFP_KERNEL);
2936 if (! template.task_name) {
2937 kfree(setup);
2938 buffer->error = -ENOMEM;
2939 mutex_unlock(&pstr->oss.setup_mutex);
2940 return;
2941 }
2942 }
2943 *setup = template;
2944 mutex_unlock(&pstr->oss.setup_mutex);
2945 }
2946 }
2947
2948 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2949 {
2950 int stream;
2951 for (stream = 0; stream < 2; ++stream) {
2952 struct snd_info_entry *entry;
2953 struct snd_pcm_str *pstr = &pcm->streams[stream];
2954 if (pstr->substream_count == 0)
2955 continue;
2956 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2957 entry->content = SNDRV_INFO_CONTENT_TEXT;
2958 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2959 entry->c.text.read = snd_pcm_oss_proc_read;
2960 entry->c.text.write = snd_pcm_oss_proc_write;
2961 entry->private_data = pstr;
2962 if (snd_info_register(entry) < 0) {
2963 snd_info_free_entry(entry);
2964 entry = NULL;
2965 }
2966 }
2967 pstr->oss.proc_entry = entry;
2968 }
2969 }
2970
2971 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2972 {
2973 int stream;
2974 for (stream = 0; stream < 2; ++stream) {
2975 struct snd_pcm_str *pstr = &pcm->streams[stream];
2976 snd_info_free_entry(pstr->oss.proc_entry);
2977 pstr->oss.proc_entry = NULL;
2978 snd_pcm_oss_proc_free_setup_list(pstr);
2979 }
2980 }
2981 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2982 #define snd_pcm_oss_proc_init(pcm)
2983 #define snd_pcm_oss_proc_done(pcm)
2984 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2985
2986 /*
2987 * ENTRY functions
2988 */
2989
2990 static const struct file_operations snd_pcm_oss_f_reg =
2991 {
2992 .owner = THIS_MODULE,
2993 .read = snd_pcm_oss_read,
2994 .write = snd_pcm_oss_write,
2995 .open = snd_pcm_oss_open,
2996 .release = snd_pcm_oss_release,
2997 .llseek = no_llseek,
2998 .poll = snd_pcm_oss_poll,
2999 .unlocked_ioctl = snd_pcm_oss_ioctl,
3000 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3001 .mmap = snd_pcm_oss_mmap,
3002 };
3003
3004 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3005 {
3006 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3007 pcm->card, index, &snd_pcm_oss_f_reg,
3008 pcm) < 0) {
3009 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3010 pcm->card->number, pcm->device);
3011 }
3012 }
3013
3014 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3015 {
3016 pcm->oss.reg = 0;
3017 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3018 char name[128];
3019 int duplex;
3020 register_oss_dsp(pcm, 0);
3021 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3022 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3023 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3024 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3025 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3026 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3027 pcm->card->number,
3028 name);
3029 #endif
3030 pcm->oss.reg++;
3031 pcm->oss.reg_mask |= 1;
3032 }
3033 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3034 register_oss_dsp(pcm, 1);
3035 pcm->oss.reg++;
3036 pcm->oss.reg_mask |= 2;
3037 }
3038
3039 if (pcm->oss.reg)
3040 snd_pcm_oss_proc_init(pcm);
3041
3042 return 0;
3043 }
3044
3045 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3046 {
3047 if (pcm->oss.reg) {
3048 if (pcm->oss.reg_mask & 1) {
3049 pcm->oss.reg_mask &= ~1;
3050 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3051 pcm->card, 0);
3052 }
3053 if (pcm->oss.reg_mask & 2) {
3054 pcm->oss.reg_mask &= ~2;
3055 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3056 pcm->card, 1);
3057 }
3058 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3059 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3060 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3061 #endif
3062 }
3063 pcm->oss.reg = 0;
3064 }
3065 return 0;
3066 }
3067
3068 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3069 {
3070 snd_pcm_oss_disconnect_minor(pcm);
3071 snd_pcm_oss_proc_done(pcm);
3072 return 0;
3073 }
3074
3075 static struct snd_pcm_notify snd_pcm_oss_notify =
3076 {
3077 .n_register = snd_pcm_oss_register_minor,
3078 .n_disconnect = snd_pcm_oss_disconnect_minor,
3079 .n_unregister = snd_pcm_oss_unregister_minor,
3080 };
3081
3082 static int __init alsa_pcm_oss_init(void)
3083 {
3084 int i;
3085 int err;
3086
3087 /* check device map table */
3088 for (i = 0; i < SNDRV_CARDS; i++) {
3089 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3090 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3091 i, dsp_map[i]);
3092 dsp_map[i] = 0;
3093 }
3094 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3095 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3096 i, adsp_map[i]);
3097 adsp_map[i] = 1;
3098 }
3099 }
3100 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3101 return err;
3102 return 0;
3103 }
3104
3105 static void __exit alsa_pcm_oss_exit(void)
3106 {
3107 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3108 }
3109
3110 module_init(alsa_pcm_oss_init)
3111 module_exit(alsa_pcm_oss_exit)
Linux with added FPC-III support