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mm: make wait_on_page_writeback() wait for multiple pending writebacks
[linux/fpc-iii.git] / sound / core / oss / pcm_oss.c
blob142fc751a84770111679f23d740a919c3377144c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Digital Audio (PCM) abstract layer / OSS compatible
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 */
6
7 #if 0
8 #define PLUGIN_DEBUG
9 #endif
10 #if 0
11 #define OSS_DEBUG
12 #endif
13
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/sched/signal.h>
17 #include <linux/time.h>
18 #include <linux/vmalloc.h>
19 #include <linux/module.h>
20 #include <linux/math64.h>
21 #include <linux/string.h>
22 #include <linux/compat.h>
23 #include <sound/core.h>
24 #include <sound/minors.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include "pcm_plugin.h"
28 #include <sound/info.h>
29 #include <linux/soundcard.h>
30 #include <sound/initval.h>
31 #include <sound/mixer_oss.h>
32
33 #define OSS_ALSAEMULVER _SIOR ('M', 249, int)
34
35 static int dsp_map[SNDRV_CARDS];
36 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
37 static bool nonblock_open = 1;
38
39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
40 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
41 MODULE_LICENSE("GPL");
42 module_param_array(dsp_map, int, NULL, 0444);
43 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
44 module_param_array(adsp_map, int, NULL, 0444);
45 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
46 module_param(nonblock_open, bool, 0644);
47 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
48 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
49 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
50
51 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
52 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
53 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
54
55 /*
56 * helper functions to process hw_params
57 */
58 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
59 {
60 int changed = 0;
61 if (i->min < min) {
62 i->min = min;
63 i->openmin = openmin;
64 changed = 1;
65 } else if (i->min == min && !i->openmin && openmin) {
66 i->openmin = 1;
67 changed = 1;
68 }
69 if (i->integer) {
70 if (i->openmin) {
71 i->min++;
72 i->openmin = 0;
73 }
74 }
75 if (snd_interval_checkempty(i)) {
76 snd_interval_none(i);
77 return -EINVAL;
78 }
79 return changed;
80 }
81
82 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
83 {
84 int changed = 0;
85 if (i->max > max) {
86 i->max = max;
87 i->openmax = openmax;
88 changed = 1;
89 } else if (i->max == max && !i->openmax && openmax) {
90 i->openmax = 1;
91 changed = 1;
92 }
93 if (i->integer) {
94 if (i->openmax) {
95 i->max--;
96 i->openmax = 0;
97 }
98 }
99 if (snd_interval_checkempty(i)) {
100 snd_interval_none(i);
101 return -EINVAL;
102 }
103 return changed;
104 }
105
106 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
107 {
108 struct snd_interval t;
109 t.empty = 0;
110 t.min = t.max = val;
111 t.openmin = t.openmax = 0;
112 t.integer = 1;
113 return snd_interval_refine(i, &t);
114 }
115
116 /**
117 * snd_pcm_hw_param_value_min
118 * @params: the hw_params instance
119 * @var: parameter to retrieve
120 * @dir: pointer to the direction (-1,0,1) or NULL
121 *
122 * Return the minimum value for field PAR.
123 */
124 static unsigned int
125 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
126 snd_pcm_hw_param_t var, int *dir)
127 {
128 if (hw_is_mask(var)) {
129 if (dir)
130 *dir = 0;
131 return snd_mask_min(hw_param_mask_c(params, var));
132 }
133 if (hw_is_interval(var)) {
134 const struct snd_interval *i = hw_param_interval_c(params, var);
135 if (dir)
136 *dir = i->openmin;
137 return snd_interval_min(i);
138 }
139 return -EINVAL;
140 }
141
142 /**
143 * snd_pcm_hw_param_value_max
144 * @params: the hw_params instance
145 * @var: parameter to retrieve
146 * @dir: pointer to the direction (-1,0,1) or NULL
147 *
148 * Return the maximum value for field PAR.
149 */
150 static unsigned int
151 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
152 snd_pcm_hw_param_t var, int *dir)
153 {
154 if (hw_is_mask(var)) {
155 if (dir)
156 *dir = 0;
157 return snd_mask_max(hw_param_mask_c(params, var));
158 }
159 if (hw_is_interval(var)) {
160 const struct snd_interval *i = hw_param_interval_c(params, var);
161 if (dir)
162 *dir = - (int) i->openmax;
163 return snd_interval_max(i);
164 }
165 return -EINVAL;
166 }
167
168 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
169 snd_pcm_hw_param_t var,
170 const struct snd_mask *val)
171 {
172 int changed;
173 changed = snd_mask_refine(hw_param_mask(params, var), val);
174 if (changed > 0) {
175 params->cmask |= 1 << var;
176 params->rmask |= 1 << var;
177 }
178 return changed;
179 }
180
181 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
182 struct snd_pcm_hw_params *params,
183 snd_pcm_hw_param_t var,
184 const struct snd_mask *val)
185 {
186 int changed = _snd_pcm_hw_param_mask(params, var, val);
187 if (changed < 0)
188 return changed;
189 if (params->rmask) {
190 int err = snd_pcm_hw_refine(pcm, params);
191 if (err < 0)
192 return err;
193 }
194 return 0;
195 }
196
197 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var, unsigned int val,
199 int dir)
200 {
201 int changed;
202 int open = 0;
203 if (dir) {
204 if (dir > 0) {
205 open = 1;
206 } else if (dir < 0) {
207 if (val > 0) {
208 open = 1;
209 val--;
210 }
211 }
212 }
213 if (hw_is_mask(var))
214 changed = snd_mask_refine_min(hw_param_mask(params, var),
215 val + !!open);
216 else if (hw_is_interval(var))
217 changed = snd_interval_refine_min(hw_param_interval(params, var),
218 val, open);
219 else
220 return -EINVAL;
221 if (changed > 0) {
222 params->cmask |= 1 << var;
223 params->rmask |= 1 << var;
224 }
225 return changed;
226 }
227
228 /**
229 * snd_pcm_hw_param_min
230 * @pcm: PCM instance
231 * @params: the hw_params instance
232 * @var: parameter to retrieve
233 * @val: minimal value
234 * @dir: pointer to the direction (-1,0,1) or NULL
235 *
236 * Inside configuration space defined by PARAMS remove from PAR all
237 * values < VAL. Reduce configuration space accordingly.
238 * Return new minimum or -EINVAL if the configuration space is empty
239 */
240 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
241 struct snd_pcm_hw_params *params,
242 snd_pcm_hw_param_t var, unsigned int val,
243 int *dir)
244 {
245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
246 if (changed < 0)
247 return changed;
248 if (params->rmask) {
249 int err = snd_pcm_hw_refine(pcm, params);
250 if (err < 0)
251 return err;
252 }
253 return snd_pcm_hw_param_value_min(params, var, dir);
254 }
255
256 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int dir)
259 {
260 int changed;
261 int open = 0;
262 if (dir) {
263 if (dir < 0) {
264 open = 1;
265 } else if (dir > 0) {
266 open = 1;
267 val++;
268 }
269 }
270 if (hw_is_mask(var)) {
271 if (val == 0 && open) {
272 snd_mask_none(hw_param_mask(params, var));
273 changed = -EINVAL;
274 } else
275 changed = snd_mask_refine_max(hw_param_mask(params, var),
276 val - !!open);
277 } else if (hw_is_interval(var))
278 changed = snd_interval_refine_max(hw_param_interval(params, var),
279 val, open);
280 else
281 return -EINVAL;
282 if (changed > 0) {
283 params->cmask |= 1 << var;
284 params->rmask |= 1 << var;
285 }
286 return changed;
287 }
288
289 /**
290 * snd_pcm_hw_param_max
291 * @pcm: PCM instance
292 * @params: the hw_params instance
293 * @var: parameter to retrieve
294 * @val: maximal value
295 * @dir: pointer to the direction (-1,0,1) or NULL
296 *
297 * Inside configuration space defined by PARAMS remove from PAR all
298 * values >= VAL + 1. Reduce configuration space accordingly.
299 * Return new maximum or -EINVAL if the configuration space is empty
300 */
301 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
302 struct snd_pcm_hw_params *params,
303 snd_pcm_hw_param_t var, unsigned int val,
304 int *dir)
305 {
306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
307 if (changed < 0)
308 return changed;
309 if (params->rmask) {
310 int err = snd_pcm_hw_refine(pcm, params);
311 if (err < 0)
312 return err;
313 }
314 return snd_pcm_hw_param_value_max(params, var, dir);
315 }
316
317 static int boundary_sub(int a, int adir,
318 int b, int bdir,
319 int *c, int *cdir)
320 {
321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
323 *c = a - b;
324 *cdir = adir - bdir;
325 if (*cdir == -2) {
326 (*c)--;
327 } else if (*cdir == 2) {
328 (*c)++;
329 }
330 return 0;
331 }
332
333 static int boundary_lt(unsigned int a, int adir,
334 unsigned int b, int bdir)
335 {
336 if (adir < 0) {
337 a--;
338 adir = 1;
339 } else if (adir > 0)
340 adir = 1;
341 if (bdir < 0) {
342 b--;
343 bdir = 1;
344 } else if (bdir > 0)
345 bdir = 1;
346 return a < b || (a == b && adir < bdir);
347 }
348
349 /* Return 1 if min is nearer to best than max */
350 static int boundary_nearer(int min, int mindir,
351 int best, int bestdir,
352 int max, int maxdir)
353 {
354 int dmin, dmindir;
355 int dmax, dmaxdir;
356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
358 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
359 }
360
361 /**
362 * snd_pcm_hw_param_near
363 * @pcm: PCM instance
364 * @params: the hw_params instance
365 * @var: parameter to retrieve
366 * @best: value to set
367 * @dir: pointer to the direction (-1,0,1) or NULL
368 *
369 * Inside configuration space defined by PARAMS set PAR to the available value
370 * nearest to VAL. Reduce configuration space accordingly.
371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
373 * Return the value found.
374 */
375 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
376 struct snd_pcm_hw_params *params,
377 snd_pcm_hw_param_t var, unsigned int best,
378 int *dir)
379 {
380 struct snd_pcm_hw_params *save = NULL;
381 int v;
382 unsigned int saved_min;
383 int last = 0;
384 int min, max;
385 int mindir, maxdir;
386 int valdir = dir ? *dir : 0;
387 /* FIXME */
388 if (best > INT_MAX)
389 best = INT_MAX;
390 min = max = best;
391 mindir = maxdir = valdir;
392 if (maxdir > 0)
393 maxdir = 0;
394 else if (maxdir == 0)
395 maxdir = -1;
396 else {
397 maxdir = 1;
398 max--;
399 }
400 save = kmalloc(sizeof(*save), GFP_KERNEL);
401 if (save == NULL)
402 return -ENOMEM;
403 *save = *params;
404 saved_min = min;
405 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
406 if (min >= 0) {
407 struct snd_pcm_hw_params *params1;
408 if (max < 0)
409 goto _end;
410 if ((unsigned int)min == saved_min && mindir == valdir)
411 goto _end;
412 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
413 if (params1 == NULL) {
414 kfree(save);
415 return -ENOMEM;
416 }
417 *params1 = *save;
418 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
419 if (max < 0) {
420 kfree(params1);
421 goto _end;
422 }
423 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
424 *params = *params1;
425 last = 1;
426 }
427 kfree(params1);
428 } else {
429 *params = *save;
430 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
431 if (max < 0) {
432 kfree(save);
433 return max;
434 }
435 last = 1;
436 }
437 _end:
438 kfree(save);
439 if (last)
440 v = snd_pcm_hw_param_last(pcm, params, var, dir);
441 else
442 v = snd_pcm_hw_param_first(pcm, params, var, dir);
443 return v;
444 }
445
446 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
447 snd_pcm_hw_param_t var, unsigned int val,
448 int dir)
449 {
450 int changed;
451 if (hw_is_mask(var)) {
452 struct snd_mask *m = hw_param_mask(params, var);
453 if (val == 0 && dir < 0) {
454 changed = -EINVAL;
455 snd_mask_none(m);
456 } else {
457 if (dir > 0)
458 val++;
459 else if (dir < 0)
460 val--;
461 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
462 }
463 } else if (hw_is_interval(var)) {
464 struct snd_interval *i = hw_param_interval(params, var);
465 if (val == 0 && dir < 0) {
466 changed = -EINVAL;
467 snd_interval_none(i);
468 } else if (dir == 0)
469 changed = snd_interval_refine_set(i, val);
470 else {
471 struct snd_interval t;
472 t.openmin = 1;
473 t.openmax = 1;
474 t.empty = 0;
475 t.integer = 0;
476 if (dir < 0) {
477 t.min = val - 1;
478 t.max = val;
479 } else {
480 t.min = val;
481 t.max = val+1;
482 }
483 changed = snd_interval_refine(i, &t);
484 }
485 } else
486 return -EINVAL;
487 if (changed > 0) {
488 params->cmask |= 1 << var;
489 params->rmask |= 1 << var;
490 }
491 return changed;
492 }
493
494 /**
495 * snd_pcm_hw_param_set
496 * @pcm: PCM instance
497 * @params: the hw_params instance
498 * @var: parameter to retrieve
499 * @val: value to set
500 * @dir: pointer to the direction (-1,0,1) or NULL
501 *
502 * Inside configuration space defined by PARAMS remove from PAR all
503 * values != VAL. Reduce configuration space accordingly.
504 * Return VAL or -EINVAL if the configuration space is empty
505 */
506 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
507 struct snd_pcm_hw_params *params,
508 snd_pcm_hw_param_t var, unsigned int val,
509 int dir)
510 {
511 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
512 if (changed < 0)
513 return changed;
514 if (params->rmask) {
515 int err = snd_pcm_hw_refine(pcm, params);
516 if (err < 0)
517 return err;
518 }
519 return snd_pcm_hw_param_value(params, var, NULL);
520 }
521
522 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var)
524 {
525 int changed;
526 changed = snd_interval_setinteger(hw_param_interval(params, var));
527 if (changed > 0) {
528 params->cmask |= 1 << var;
529 params->rmask |= 1 << var;
530 }
531 return changed;
532 }
533
534 /*
535 * plugin
536 */
537
538 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
539 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
540 {
541 struct snd_pcm_runtime *runtime = substream->runtime;
542 struct snd_pcm_plugin *plugin, *next;
543
544 plugin = runtime->oss.plugin_first;
545 while (plugin) {
546 next = plugin->next;
547 snd_pcm_plugin_free(plugin);
548 plugin = next;
549 }
550 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
551 return 0;
552 }
553
554 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
555 {
556 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
557 plugin->next = runtime->oss.plugin_first;
558 plugin->prev = NULL;
559 if (runtime->oss.plugin_first) {
560 runtime->oss.plugin_first->prev = plugin;
561 runtime->oss.plugin_first = plugin;
562 } else {
563 runtime->oss.plugin_last =
564 runtime->oss.plugin_first = plugin;
565 }
566 return 0;
567 }
568
569 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
570 {
571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
572 plugin->next = NULL;
573 plugin->prev = runtime->oss.plugin_last;
574 if (runtime->oss.plugin_last) {
575 runtime->oss.plugin_last->next = plugin;
576 runtime->oss.plugin_last = plugin;
577 } else {
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
580 }
581 return 0;
582 }
583 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
584
585 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
586 {
587 struct snd_pcm_runtime *runtime = substream->runtime;
588 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
589 long bytes = frames_to_bytes(runtime, frames);
590 if (buffer_size == runtime->oss.buffer_bytes)
591 return bytes;
592 #if BITS_PER_LONG >= 64
593 return runtime->oss.buffer_bytes * bytes / buffer_size;
594 #else
595 {
596 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
597 return div_u64(bsize, buffer_size);
598 }
599 #endif
600 }
601
602 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
603 {
604 struct snd_pcm_runtime *runtime = substream->runtime;
605 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
606 if (buffer_size == runtime->oss.buffer_bytes)
607 return bytes_to_frames(runtime, bytes);
608 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
609 }
610
611 static inline
612 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
613 {
614 return runtime->hw_ptr_interrupt;
615 }
616
617 /* define extended formats in the recent OSS versions (if any) */
618 /* linear formats */
619 #define AFMT_S32_LE 0x00001000
620 #define AFMT_S32_BE 0x00002000
621 #define AFMT_S24_LE 0x00008000
622 #define AFMT_S24_BE 0x00010000
623 #define AFMT_S24_PACKED 0x00040000
624
625 /* other supported formats */
626 #define AFMT_FLOAT 0x00004000
627 #define AFMT_SPDIF_RAW 0x00020000
628
629 /* unsupported formats */
630 #define AFMT_AC3 0x00000400
631 #define AFMT_VORBIS 0x00000800
632
633 static snd_pcm_format_t snd_pcm_oss_format_from(int format)
634 {
635 switch (format) {
636 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
637 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
638 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
639 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
640 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
641 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
642 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
643 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
644 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
645 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
646 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
647 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
648 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
649 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
650 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
651 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
652 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
653 default: return SNDRV_PCM_FORMAT_U8;
654 }
655 }
656
657 static int snd_pcm_oss_format_to(snd_pcm_format_t format)
658 {
659 switch (format) {
660 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
661 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
662 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
663 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
664 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
665 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
666 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
667 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
668 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
669 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
670 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
671 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
672 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
673 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
674 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
675 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
676 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
677 default: return -EINVAL;
678 }
679 }
680
681 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
682 struct snd_pcm_hw_params *oss_params,
683 struct snd_pcm_hw_params *slave_params)
684 {
685 size_t s;
686 size_t oss_buffer_size, oss_period_size, oss_periods;
687 size_t min_period_size, max_period_size;
688 struct snd_pcm_runtime *runtime = substream->runtime;
689 size_t oss_frame_size;
690
691 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
692 params_channels(oss_params) / 8;
693
694 oss_buffer_size = snd_pcm_plug_client_size(substream,
695 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
696 if (!oss_buffer_size)
697 return -EINVAL;
698 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
699 if (atomic_read(&substream->mmap_count)) {
700 if (oss_buffer_size > runtime->oss.mmap_bytes)
701 oss_buffer_size = runtime->oss.mmap_bytes;
702 }
703
704 if (substream->oss.setup.period_size > 16)
705 oss_period_size = substream->oss.setup.period_size;
706 else if (runtime->oss.fragshift) {
707 oss_period_size = 1 << runtime->oss.fragshift;
708 if (oss_period_size > oss_buffer_size / 2)
709 oss_period_size = oss_buffer_size / 2;
710 } else {
711 int sd;
712 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
713
714 oss_period_size = oss_buffer_size;
715 do {
716 oss_period_size /= 2;
717 } while (oss_period_size > bytes_per_sec);
718 if (runtime->oss.subdivision == 0) {
719 sd = 4;
720 if (oss_period_size / sd > 4096)
721 sd *= 2;
722 if (oss_period_size / sd < 4096)
723 sd = 1;
724 } else
725 sd = runtime->oss.subdivision;
726 oss_period_size /= sd;
727 if (oss_period_size < 16)
728 oss_period_size = 16;
729 }
730
731 min_period_size = snd_pcm_plug_client_size(substream,
732 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
733 if (min_period_size) {
734 min_period_size *= oss_frame_size;
735 min_period_size = roundup_pow_of_two(min_period_size);
736 if (oss_period_size < min_period_size)
737 oss_period_size = min_period_size;
738 }
739
740 max_period_size = snd_pcm_plug_client_size(substream,
741 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
742 if (max_period_size) {
743 max_period_size *= oss_frame_size;
744 max_period_size = rounddown_pow_of_two(max_period_size);
745 if (oss_period_size > max_period_size)
746 oss_period_size = max_period_size;
747 }
748
749 oss_periods = oss_buffer_size / oss_period_size;
750
751 if (substream->oss.setup.periods > 1)
752 oss_periods = substream->oss.setup.periods;
753
754 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
755 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
756 s = runtime->oss.maxfrags;
757 if (oss_periods > s)
758 oss_periods = s;
759
760 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
761 if (s < 2)
762 s = 2;
763 if (oss_periods < s)
764 oss_periods = s;
765
766 while (oss_period_size * oss_periods > oss_buffer_size)
767 oss_period_size /= 2;
768
769 if (oss_period_size < 16)
770 return -EINVAL;
771 runtime->oss.period_bytes = oss_period_size;
772 runtime->oss.period_frames = 1;
773 runtime->oss.periods = oss_periods;
774 return 0;
775 }
776
777 static int choose_rate(struct snd_pcm_substream *substream,
778 struct snd_pcm_hw_params *params, unsigned int best_rate)
779 {
780 const struct snd_interval *it;
781 struct snd_pcm_hw_params *save;
782 unsigned int rate, prev;
783
784 save = kmalloc(sizeof(*save), GFP_KERNEL);
785 if (save == NULL)
786 return -ENOMEM;
787 *save = *params;
788 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
789
790 /* try multiples of the best rate */
791 rate = best_rate;
792 for (;;) {
793 if (it->max < rate || (it->max == rate && it->openmax))
794 break;
795 if (it->min < rate || (it->min == rate && !it->openmin)) {
796 int ret;
797 ret = snd_pcm_hw_param_set(substream, params,
798 SNDRV_PCM_HW_PARAM_RATE,
799 rate, 0);
800 if (ret == (int)rate) {
801 kfree(save);
802 return rate;
803 }
804 *params = *save;
805 }
806 prev = rate;
807 rate += best_rate;
808 if (rate <= prev)
809 break;
810 }
811
812 /* not found, use the nearest rate */
813 kfree(save);
814 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
815 }
816
817 /* parameter locking: returns immediately if tried during streaming */
818 static int lock_params(struct snd_pcm_runtime *runtime)
819 {
820 if (mutex_lock_interruptible(&runtime->oss.params_lock))
821 return -ERESTARTSYS;
822 if (atomic_read(&runtime->oss.rw_ref)) {
823 mutex_unlock(&runtime->oss.params_lock);
824 return -EBUSY;
825 }
826 return 0;
827 }
828
829 static void unlock_params(struct snd_pcm_runtime *runtime)
830 {
831 mutex_unlock(&runtime->oss.params_lock);
832 }
833
834 /* call with params_lock held */
835 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
836 {
837 struct snd_pcm_runtime *runtime = substream->runtime;
838 struct snd_pcm_hw_params *params, *sparams;
839 struct snd_pcm_sw_params *sw_params;
840 ssize_t oss_buffer_size, oss_period_size;
841 size_t oss_frame_size;
842 int err;
843 int direct;
844 snd_pcm_format_t format, sformat;
845 int n;
846 const struct snd_mask *sformat_mask;
847 struct snd_mask mask;
848
849 if (!runtime->oss.params)
850 return 0;
851 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
852 params = kmalloc(sizeof(*params), GFP_KERNEL);
853 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
854 if (!sw_params || !params || !sparams) {
855 err = -ENOMEM;
856 goto failure;
857 }
858
859 if (atomic_read(&substream->mmap_count))
860 direct = 1;
861 else
862 direct = substream->oss.setup.direct;
863
864 _snd_pcm_hw_params_any(sparams);
865 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
866 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
867 snd_mask_none(&mask);
868 if (atomic_read(&substream->mmap_count))
869 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
870 else {
871 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
872 if (!direct)
873 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
874 }
875 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
876 if (err < 0) {
877 pcm_dbg(substream->pcm, "No usable accesses\n");
878 err = -EINVAL;
879 goto failure;
880 }
881 choose_rate(substream, sparams, runtime->oss.rate);
882 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
883
884 format = snd_pcm_oss_format_from(runtime->oss.format);
885
886 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
887 if (direct)
888 sformat = format;
889 else
890 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
891
892 if ((__force int)sformat < 0 ||
893 !snd_mask_test_format(sformat_mask, sformat)) {
894 pcm_for_each_format(sformat) {
895 if (snd_mask_test_format(sformat_mask, sformat) &&
896 snd_pcm_oss_format_to(sformat) >= 0)
897 goto format_found;
898 }
899 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
900 err = -EINVAL;
901 goto failure;
902 }
903 format_found:
904 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
905 if (err < 0)
906 goto failure;
907
908 if (direct) {
909 memcpy(params, sparams, sizeof(*params));
910 } else {
911 _snd_pcm_hw_params_any(params);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
913 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
914 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
915 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
916 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
917 runtime->oss.channels, 0);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
919 runtime->oss.rate, 0);
920 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
921 params_access(params), params_format(params),
922 params_channels(params), params_rate(params));
923 }
924 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
925 params_access(sparams), params_format(sparams),
926 params_channels(sparams), params_rate(sparams));
927
928 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
929 params_channels(params) / 8;
930
931 err = snd_pcm_oss_period_size(substream, params, sparams);
932 if (err < 0)
933 goto failure;
934
935 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
936 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
937 if (err < 0)
938 goto failure;
939
940 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
941 runtime->oss.periods, NULL);
942 if (err < 0)
943 goto failure;
944
945 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
946
947 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
948 if (err < 0) {
949 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
950 goto failure;
951 }
952
953 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
954 snd_pcm_oss_plugin_clear(substream);
955 if (!direct) {
956 /* add necessary plugins */
957 snd_pcm_oss_plugin_clear(substream);
958 if ((err = snd_pcm_plug_format_plugins(substream,
959 params,
960 sparams)) < 0) {
961 pcm_dbg(substream->pcm,
962 "snd_pcm_plug_format_plugins failed: %i\n", err);
963 snd_pcm_oss_plugin_clear(substream);
964 goto failure;
965 }
966 if (runtime->oss.plugin_first) {
967 struct snd_pcm_plugin *plugin;
968 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
969 pcm_dbg(substream->pcm,
970 "snd_pcm_plugin_build_io failed: %i\n", err);
971 snd_pcm_oss_plugin_clear(substream);
972 goto failure;
973 }
974 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
975 err = snd_pcm_plugin_append(plugin);
976 } else {
977 err = snd_pcm_plugin_insert(plugin);
978 }
979 if (err < 0) {
980 snd_pcm_oss_plugin_clear(substream);
981 goto failure;
982 }
983 }
984 }
985 #endif
986
987 if (runtime->oss.trigger) {
988 sw_params->start_threshold = 1;
989 } else {
990 sw_params->start_threshold = runtime->boundary;
991 }
992 if (atomic_read(&substream->mmap_count) ||
993 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
994 sw_params->stop_threshold = runtime->boundary;
995 else
996 sw_params->stop_threshold = runtime->buffer_size;
997 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
998 sw_params->period_step = 1;
999 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1000 1 : runtime->period_size;
1001 if (atomic_read(&substream->mmap_count) ||
1002 substream->oss.setup.nosilence) {
1003 sw_params->silence_threshold = 0;
1004 sw_params->silence_size = 0;
1005 } else {
1006 snd_pcm_uframes_t frames;
1007 frames = runtime->period_size + 16;
1008 if (frames > runtime->buffer_size)
1009 frames = runtime->buffer_size;
1010 sw_params->silence_threshold = frames;
1011 sw_params->silence_size = frames;
1012 }
1013
1014 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1015 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1016 goto failure;
1017 }
1018
1019 runtime->oss.periods = params_periods(sparams);
1020 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
1021 if (oss_period_size < 0) {
1022 err = -EINVAL;
1023 goto failure;
1024 }
1025 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1026 if (runtime->oss.plugin_first) {
1027 err = snd_pcm_plug_alloc(substream, oss_period_size);
1028 if (err < 0)
1029 goto failure;
1030 }
1031 #endif
1032 oss_period_size *= oss_frame_size;
1033
1034 oss_buffer_size = oss_period_size * runtime->oss.periods;
1035 if (oss_buffer_size < 0) {
1036 err = -EINVAL;
1037 goto failure;
1038 }
1039
1040 runtime->oss.period_bytes = oss_period_size;
1041 runtime->oss.buffer_bytes = oss_buffer_size;
1042
1043 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1044 runtime->oss.period_bytes,
1045 runtime->oss.buffer_bytes);
1046 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1047 params_period_size(sparams),
1048 params_buffer_size(sparams));
1049
1050 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1051 runtime->oss.channels = params_channels(params);
1052 runtime->oss.rate = params_rate(params);
1053
1054 kvfree(runtime->oss.buffer);
1055 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
1056 if (!runtime->oss.buffer) {
1057 err = -ENOMEM;
1058 goto failure;
1059 }
1060
1061 runtime->oss.params = 0;
1062 runtime->oss.prepare = 1;
1063 runtime->oss.buffer_used = 0;
1064 if (runtime->dma_area)
1065 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1066
1067 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1068
1069 err = 0;
1070 failure:
1071 kfree(sw_params);
1072 kfree(params);
1073 kfree(sparams);
1074 return err;
1075 }
1076
1077 /* this one takes the lock by itself */
1078 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1079 bool trylock)
1080 {
1081 struct snd_pcm_runtime *runtime = substream->runtime;
1082 int err;
1083
1084 if (trylock) {
1085 if (!(mutex_trylock(&runtime->oss.params_lock)))
1086 return -EAGAIN;
1087 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1088 return -ERESTARTSYS;
1089
1090 err = snd_pcm_oss_change_params_locked(substream);
1091 mutex_unlock(&runtime->oss.params_lock);
1092 return err;
1093 }
1094
1095 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1096 {
1097 int idx, err;
1098 struct snd_pcm_substream *asubstream = NULL, *substream;
1099
1100 for (idx = 0; idx < 2; idx++) {
1101 substream = pcm_oss_file->streams[idx];
1102 if (substream == NULL)
1103 continue;
1104 if (asubstream == NULL)
1105 asubstream = substream;
1106 if (substream->runtime->oss.params) {
1107 err = snd_pcm_oss_change_params(substream, false);
1108 if (err < 0)
1109 return err;
1110 }
1111 }
1112 if (!asubstream)
1113 return -EIO;
1114 if (r_substream)
1115 *r_substream = asubstream;
1116 return 0;
1117 }
1118
1119 /* call with params_lock held */
1120 /* NOTE: this always call PREPARE unconditionally no matter whether
1121 * runtime->oss.prepare is set or not
1122 */
1123 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1124 {
1125 int err;
1126 struct snd_pcm_runtime *runtime = substream->runtime;
1127
1128 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1129 if (err < 0) {
1130 pcm_dbg(substream->pcm,
1131 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1132 return err;
1133 }
1134 runtime->oss.prepare = 0;
1135 runtime->oss.prev_hw_ptr_period = 0;
1136 runtime->oss.period_ptr = 0;
1137 runtime->oss.buffer_used = 0;
1138
1139 return 0;
1140 }
1141
1142 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1143 {
1144 struct snd_pcm_runtime *runtime;
1145 int err;
1146
1147 runtime = substream->runtime;
1148 if (runtime->oss.params) {
1149 err = snd_pcm_oss_change_params(substream, false);
1150 if (err < 0)
1151 return err;
1152 }
1153 if (runtime->oss.prepare) {
1154 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1155 return -ERESTARTSYS;
1156 err = snd_pcm_oss_prepare(substream);
1157 mutex_unlock(&runtime->oss.params_lock);
1158 if (err < 0)
1159 return err;
1160 }
1161 return 0;
1162 }
1163
1164 /* call with params_lock held */
1165 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1166 {
1167 struct snd_pcm_runtime *runtime;
1168 int err;
1169
1170 runtime = substream->runtime;
1171 if (runtime->oss.params) {
1172 err = snd_pcm_oss_change_params_locked(substream);
1173 if (err < 0)
1174 return err;
1175 }
1176 if (runtime->oss.prepare) {
1177 err = snd_pcm_oss_prepare(substream);
1178 if (err < 0)
1179 return err;
1180 }
1181 return 0;
1182 }
1183
1184 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1185 {
1186 struct snd_pcm_runtime *runtime;
1187 snd_pcm_uframes_t frames;
1188 int err = 0;
1189
1190 while (1) {
1191 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1192 if (err < 0)
1193 break;
1194 runtime = substream->runtime;
1195 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1196 break;
1197 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1198 /* until avail(delay) <= buffer_size */
1199 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1200 frames /= runtime->period_size;
1201 frames *= runtime->period_size;
1202 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1203 if (err < 0)
1204 break;
1205 }
1206 return err;
1207 }
1208
1209 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1210 {
1211 struct snd_pcm_runtime *runtime = substream->runtime;
1212 int ret;
1213 while (1) {
1214 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1215 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1216 #ifdef OSS_DEBUG
1217 pcm_dbg(substream->pcm,
1218 "pcm_oss: write: recovering from %s\n",
1219 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1220 "XRUN" : "SUSPEND");
1221 #endif
1222 ret = snd_pcm_oss_prepare(substream);
1223 if (ret < 0)
1224 break;
1225 }
1226 mutex_unlock(&runtime->oss.params_lock);
1227 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1228 frames, in_kernel);
1229 mutex_lock(&runtime->oss.params_lock);
1230 if (ret != -EPIPE && ret != -ESTRPIPE)
1231 break;
1232 /* test, if we can't store new data, because the stream */
1233 /* has not been started */
1234 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1235 return -EAGAIN;
1236 }
1237 return ret;
1238 }
1239
1240 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1241 {
1242 struct snd_pcm_runtime *runtime = substream->runtime;
1243 snd_pcm_sframes_t delay;
1244 int ret;
1245 while (1) {
1246 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1247 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1248 #ifdef OSS_DEBUG
1249 pcm_dbg(substream->pcm,
1250 "pcm_oss: read: recovering from %s\n",
1251 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1252 "XRUN" : "SUSPEND");
1253 #endif
1254 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1255 if (ret < 0)
1256 break;
1257 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1258 ret = snd_pcm_oss_prepare(substream);
1259 if (ret < 0)
1260 break;
1261 }
1262 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1263 if (ret < 0)
1264 break;
1265 mutex_unlock(&runtime->oss.params_lock);
1266 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1267 frames, in_kernel);
1268 mutex_lock(&runtime->oss.params_lock);
1269 if (ret == -EPIPE) {
1270 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1271 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1272 if (ret < 0)
1273 break;
1274 }
1275 continue;
1276 }
1277 if (ret != -ESTRPIPE)
1278 break;
1279 }
1280 return ret;
1281 }
1282
1283 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1284 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1285 {
1286 struct snd_pcm_runtime *runtime = substream->runtime;
1287 int ret;
1288 while (1) {
1289 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1290 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1291 #ifdef OSS_DEBUG
1292 pcm_dbg(substream->pcm,
1293 "pcm_oss: writev: recovering from %s\n",
1294 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1295 "XRUN" : "SUSPEND");
1296 #endif
1297 ret = snd_pcm_oss_prepare(substream);
1298 if (ret < 0)
1299 break;
1300 }
1301 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1302 if (ret != -EPIPE && ret != -ESTRPIPE)
1303 break;
1304
1305 /* test, if we can't store new data, because the stream */
1306 /* has not been started */
1307 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1308 return -EAGAIN;
1309 }
1310 return ret;
1311 }
1312
1313 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1314 {
1315 struct snd_pcm_runtime *runtime = substream->runtime;
1316 int ret;
1317 while (1) {
1318 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1319 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1320 #ifdef OSS_DEBUG
1321 pcm_dbg(substream->pcm,
1322 "pcm_oss: readv: recovering from %s\n",
1323 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1324 "XRUN" : "SUSPEND");
1325 #endif
1326 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1327 if (ret < 0)
1328 break;
1329 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1330 ret = snd_pcm_oss_prepare(substream);
1331 if (ret < 0)
1332 break;
1333 }
1334 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1335 if (ret != -EPIPE && ret != -ESTRPIPE)
1336 break;
1337 }
1338 return ret;
1339 }
1340 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1341
1342 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1343 {
1344 struct snd_pcm_runtime *runtime = substream->runtime;
1345 snd_pcm_sframes_t frames, frames1;
1346 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1347 if (runtime->oss.plugin_first) {
1348 struct snd_pcm_plugin_channel *channels;
1349 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1350 if (!in_kernel) {
1351 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1352 return -EFAULT;
1353 buf = runtime->oss.buffer;
1354 }
1355 frames = bytes / oss_frame_bytes;
1356 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1357 if (frames1 < 0)
1358 return frames1;
1359 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1360 if (frames1 <= 0)
1361 return frames1;
1362 bytes = frames1 * oss_frame_bytes;
1363 } else
1364 #endif
1365 {
1366 frames = bytes_to_frames(runtime, bytes);
1367 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1368 if (frames1 <= 0)
1369 return frames1;
1370 bytes = frames_to_bytes(runtime, frames1);
1371 }
1372 return bytes;
1373 }
1374
1375 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1376 {
1377 size_t xfer = 0;
1378 ssize_t tmp = 0;
1379 struct snd_pcm_runtime *runtime = substream->runtime;
1380
1381 if (atomic_read(&substream->mmap_count))
1382 return -ENXIO;
1383
1384 atomic_inc(&runtime->oss.rw_ref);
1385 while (bytes > 0) {
1386 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1387 tmp = -ERESTARTSYS;
1388 break;
1389 }
1390 tmp = snd_pcm_oss_make_ready_locked(substream);
1391 if (tmp < 0)
1392 goto err;
1393 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1394 tmp = bytes;
1395 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1396 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1397 if (tmp > 0) {
1398 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1399 tmp = -EFAULT;
1400 goto err;
1401 }
1402 }
1403 runtime->oss.buffer_used += tmp;
1404 buf += tmp;
1405 bytes -= tmp;
1406 xfer += tmp;
1407 if (substream->oss.setup.partialfrag ||
1408 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1409 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1410 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1411 if (tmp <= 0)
1412 goto err;
1413 runtime->oss.bytes += tmp;
1414 runtime->oss.period_ptr += tmp;
1415 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1416 if (runtime->oss.period_ptr == 0 ||
1417 runtime->oss.period_ptr == runtime->oss.buffer_used)
1418 runtime->oss.buffer_used = 0;
1419 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1420 tmp = -EAGAIN;
1421 goto err;
1422 }
1423 }
1424 } else {
1425 tmp = snd_pcm_oss_write2(substream,
1426 (const char __force *)buf,
1427 runtime->oss.period_bytes, 0);
1428 if (tmp <= 0)
1429 goto err;
1430 runtime->oss.bytes += tmp;
1431 buf += tmp;
1432 bytes -= tmp;
1433 xfer += tmp;
1434 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1435 tmp != runtime->oss.period_bytes)
1436 tmp = -EAGAIN;
1437 }
1438 err:
1439 mutex_unlock(&runtime->oss.params_lock);
1440 if (tmp < 0)
1441 break;
1442 if (signal_pending(current)) {
1443 tmp = -ERESTARTSYS;
1444 break;
1445 }
1446 tmp = 0;
1447 }
1448 atomic_dec(&runtime->oss.rw_ref);
1449 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1450 }
1451
1452 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1453 {
1454 struct snd_pcm_runtime *runtime = substream->runtime;
1455 snd_pcm_sframes_t frames, frames1;
1456 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1457 char __user *final_dst = (char __force __user *)buf;
1458 if (runtime->oss.plugin_first) {
1459 struct snd_pcm_plugin_channel *channels;
1460 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1461 if (!in_kernel)
1462 buf = runtime->oss.buffer;
1463 frames = bytes / oss_frame_bytes;
1464 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1465 if (frames1 < 0)
1466 return frames1;
1467 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1468 if (frames1 <= 0)
1469 return frames1;
1470 bytes = frames1 * oss_frame_bytes;
1471 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1472 return -EFAULT;
1473 } else
1474 #endif
1475 {
1476 frames = bytes_to_frames(runtime, bytes);
1477 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1478 if (frames1 <= 0)
1479 return frames1;
1480 bytes = frames_to_bytes(runtime, frames1);
1481 }
1482 return bytes;
1483 }
1484
1485 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1486 {
1487 size_t xfer = 0;
1488 ssize_t tmp = 0;
1489 struct snd_pcm_runtime *runtime = substream->runtime;
1490
1491 if (atomic_read(&substream->mmap_count))
1492 return -ENXIO;
1493
1494 atomic_inc(&runtime->oss.rw_ref);
1495 while (bytes > 0) {
1496 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1497 tmp = -ERESTARTSYS;
1498 break;
1499 }
1500 tmp = snd_pcm_oss_make_ready_locked(substream);
1501 if (tmp < 0)
1502 goto err;
1503 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1504 if (runtime->oss.buffer_used == 0) {
1505 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1506 if (tmp <= 0)
1507 goto err;
1508 runtime->oss.bytes += tmp;
1509 runtime->oss.period_ptr = tmp;
1510 runtime->oss.buffer_used = tmp;
1511 }
1512 tmp = bytes;
1513 if ((size_t) tmp > runtime->oss.buffer_used)
1514 tmp = runtime->oss.buffer_used;
1515 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1516 tmp = -EFAULT;
1517 goto err;
1518 }
1519 buf += tmp;
1520 bytes -= tmp;
1521 xfer += tmp;
1522 runtime->oss.buffer_used -= tmp;
1523 } else {
1524 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1525 runtime->oss.period_bytes, 0);
1526 if (tmp <= 0)
1527 goto err;
1528 runtime->oss.bytes += tmp;
1529 buf += tmp;
1530 bytes -= tmp;
1531 xfer += tmp;
1532 }
1533 err:
1534 mutex_unlock(&runtime->oss.params_lock);
1535 if (tmp < 0)
1536 break;
1537 if (signal_pending(current)) {
1538 tmp = -ERESTARTSYS;
1539 break;
1540 }
1541 tmp = 0;
1542 }
1543 atomic_dec(&runtime->oss.rw_ref);
1544 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1545 }
1546
1547 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1548 {
1549 struct snd_pcm_substream *substream;
1550 struct snd_pcm_runtime *runtime;
1551 int i;
1552
1553 for (i = 0; i < 2; i++) {
1554 substream = pcm_oss_file->streams[i];
1555 if (!substream)
1556 continue;
1557 runtime = substream->runtime;
1558 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1559 mutex_lock(&runtime->oss.params_lock);
1560 runtime->oss.prepare = 1;
1561 runtime->oss.buffer_used = 0;
1562 runtime->oss.prev_hw_ptr_period = 0;
1563 runtime->oss.period_ptr = 0;
1564 mutex_unlock(&runtime->oss.params_lock);
1565 }
1566 return 0;
1567 }
1568
1569 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1570 {
1571 struct snd_pcm_substream *substream;
1572 int err;
1573
1574 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1575 if (substream != NULL) {
1576 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1577 return err;
1578 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1579 }
1580 /* note: all errors from the start action are ignored */
1581 /* OSS apps do not know, how to handle them */
1582 return 0;
1583 }
1584
1585 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1586 {
1587 struct snd_pcm_runtime *runtime;
1588 ssize_t result = 0;
1589 snd_pcm_state_t state;
1590 long res;
1591 wait_queue_entry_t wait;
1592
1593 runtime = substream->runtime;
1594 init_waitqueue_entry(&wait, current);
1595 add_wait_queue(&runtime->sleep, &wait);
1596 #ifdef OSS_DEBUG
1597 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1598 #endif
1599 while (1) {
1600 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1601 if (result > 0) {
1602 runtime->oss.buffer_used = 0;
1603 result = 0;
1604 break;
1605 }
1606 if (result != 0 && result != -EAGAIN)
1607 break;
1608 result = 0;
1609 set_current_state(TASK_INTERRUPTIBLE);
1610 snd_pcm_stream_lock_irq(substream);
1611 state = runtime->status->state;
1612 snd_pcm_stream_unlock_irq(substream);
1613 if (state != SNDRV_PCM_STATE_RUNNING) {
1614 set_current_state(TASK_RUNNING);
1615 break;
1616 }
1617 res = schedule_timeout(10 * HZ);
1618 if (signal_pending(current)) {
1619 result = -ERESTARTSYS;
1620 break;
1621 }
1622 if (res == 0) {
1623 pcm_err(substream->pcm,
1624 "OSS sync error - DMA timeout\n");
1625 result = -EIO;
1626 break;
1627 }
1628 }
1629 remove_wait_queue(&runtime->sleep, &wait);
1630 return result;
1631 }
1632
1633 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1634 {
1635 int err = 0;
1636 unsigned int saved_f_flags;
1637 struct snd_pcm_substream *substream;
1638 struct snd_pcm_runtime *runtime;
1639 snd_pcm_format_t format;
1640 unsigned long width;
1641 size_t size;
1642
1643 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1644 if (substream != NULL) {
1645 runtime = substream->runtime;
1646 if (atomic_read(&substream->mmap_count))
1647 goto __direct;
1648 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1649 return err;
1650 atomic_inc(&runtime->oss.rw_ref);
1651 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1652 atomic_dec(&runtime->oss.rw_ref);
1653 return -ERESTARTSYS;
1654 }
1655 format = snd_pcm_oss_format_from(runtime->oss.format);
1656 width = snd_pcm_format_physical_width(format);
1657 if (runtime->oss.buffer_used > 0) {
1658 #ifdef OSS_DEBUG
1659 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1660 #endif
1661 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1662 snd_pcm_format_set_silence(format,
1663 runtime->oss.buffer + runtime->oss.buffer_used,
1664 size);
1665 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1666 if (err < 0)
1667 goto unlock;
1668 } else if (runtime->oss.period_ptr > 0) {
1669 #ifdef OSS_DEBUG
1670 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1671 #endif
1672 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1673 snd_pcm_format_set_silence(format,
1674 runtime->oss.buffer,
1675 size * 8 / width);
1676 err = snd_pcm_oss_sync1(substream, size);
1677 if (err < 0)
1678 goto unlock;
1679 }
1680 /*
1681 * The ALSA's period might be a bit large than OSS one.
1682 * Fill the remain portion of ALSA period with zeros.
1683 */
1684 size = runtime->control->appl_ptr % runtime->period_size;
1685 if (size > 0) {
1686 size = runtime->period_size - size;
1687 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1688 snd_pcm_lib_write(substream, NULL, size);
1689 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1690 snd_pcm_lib_writev(substream, NULL, size);
1691 }
1692 unlock:
1693 mutex_unlock(&runtime->oss.params_lock);
1694 atomic_dec(&runtime->oss.rw_ref);
1695 if (err < 0)
1696 return err;
1697 /*
1698 * finish sync: drain the buffer
1699 */
1700 __direct:
1701 saved_f_flags = substream->f_flags;
1702 substream->f_flags &= ~O_NONBLOCK;
1703 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1704 substream->f_flags = saved_f_flags;
1705 if (err < 0)
1706 return err;
1707 mutex_lock(&runtime->oss.params_lock);
1708 runtime->oss.prepare = 1;
1709 mutex_unlock(&runtime->oss.params_lock);
1710 }
1711
1712 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1713 if (substream != NULL) {
1714 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1715 return err;
1716 runtime = substream->runtime;
1717 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1718 if (err < 0)
1719 return err;
1720 mutex_lock(&runtime->oss.params_lock);
1721 runtime->oss.buffer_used = 0;
1722 runtime->oss.prepare = 1;
1723 mutex_unlock(&runtime->oss.params_lock);
1724 }
1725 return 0;
1726 }
1727
1728 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1729 {
1730 int idx;
1731
1732 for (idx = 1; idx >= 0; --idx) {
1733 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1734 struct snd_pcm_runtime *runtime;
1735 int err;
1736
1737 if (substream == NULL)
1738 continue;
1739 runtime = substream->runtime;
1740 if (rate < 1000)
1741 rate = 1000;
1742 else if (rate > 192000)
1743 rate = 192000;
1744 err = lock_params(runtime);
1745 if (err < 0)
1746 return err;
1747 if (runtime->oss.rate != rate) {
1748 runtime->oss.params = 1;
1749 runtime->oss.rate = rate;
1750 }
1751 unlock_params(runtime);
1752 }
1753 return snd_pcm_oss_get_rate(pcm_oss_file);
1754 }
1755
1756 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1757 {
1758 struct snd_pcm_substream *substream;
1759 int err;
1760
1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762 return err;
1763 return substream->runtime->oss.rate;
1764 }
1765
1766 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1767 {
1768 int idx;
1769 if (channels < 1)
1770 channels = 1;
1771 if (channels > 128)
1772 return -EINVAL;
1773 for (idx = 1; idx >= 0; --idx) {
1774 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1775 struct snd_pcm_runtime *runtime;
1776 int err;
1777
1778 if (substream == NULL)
1779 continue;
1780 runtime = substream->runtime;
1781 err = lock_params(runtime);
1782 if (err < 0)
1783 return err;
1784 if (runtime->oss.channels != channels) {
1785 runtime->oss.params = 1;
1786 runtime->oss.channels = channels;
1787 }
1788 unlock_params(runtime);
1789 }
1790 return snd_pcm_oss_get_channels(pcm_oss_file);
1791 }
1792
1793 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1794 {
1795 struct snd_pcm_substream *substream;
1796 int err;
1797
1798 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1799 return err;
1800 return substream->runtime->oss.channels;
1801 }
1802
1803 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1804 {
1805 struct snd_pcm_substream *substream;
1806 int err;
1807
1808 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1809 return err;
1810 return substream->runtime->oss.period_bytes;
1811 }
1812
1813 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1814 {
1815 struct snd_pcm_substream *substream;
1816 int err;
1817 int direct;
1818 struct snd_pcm_hw_params *params;
1819 unsigned int formats = 0;
1820 const struct snd_mask *format_mask;
1821 int fmt;
1822
1823 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1824 return err;
1825 if (atomic_read(&substream->mmap_count))
1826 direct = 1;
1827 else
1828 direct = substream->oss.setup.direct;
1829 if (!direct)
1830 return AFMT_MU_LAW | AFMT_U8 |
1831 AFMT_S16_LE | AFMT_S16_BE |
1832 AFMT_S8 | AFMT_U16_LE |
1833 AFMT_U16_BE |
1834 AFMT_S32_LE | AFMT_S32_BE |
1835 AFMT_S24_LE | AFMT_S24_BE |
1836 AFMT_S24_PACKED;
1837 params = kmalloc(sizeof(*params), GFP_KERNEL);
1838 if (!params)
1839 return -ENOMEM;
1840 _snd_pcm_hw_params_any(params);
1841 err = snd_pcm_hw_refine(substream, params);
1842 if (err < 0)
1843 goto error;
1844 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1845 for (fmt = 0; fmt < 32; ++fmt) {
1846 if (snd_mask_test(format_mask, fmt)) {
1847 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1848 if (f >= 0)
1849 formats |= f;
1850 }
1851 }
1852
1853 error:
1854 kfree(params);
1855 return err < 0 ? err : formats;
1856 }
1857
1858 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1859 {
1860 int formats, idx;
1861 int err;
1862
1863 if (format != AFMT_QUERY) {
1864 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1865 if (formats < 0)
1866 return formats;
1867 if (!(formats & format))
1868 format = AFMT_U8;
1869 for (idx = 1; idx >= 0; --idx) {
1870 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1871 struct snd_pcm_runtime *runtime;
1872 if (substream == NULL)
1873 continue;
1874 runtime = substream->runtime;
1875 err = lock_params(runtime);
1876 if (err < 0)
1877 return err;
1878 if (runtime->oss.format != format) {
1879 runtime->oss.params = 1;
1880 runtime->oss.format = format;
1881 }
1882 unlock_params(runtime);
1883 }
1884 }
1885 return snd_pcm_oss_get_format(pcm_oss_file);
1886 }
1887
1888 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1889 {
1890 struct snd_pcm_substream *substream;
1891 int err;
1892
1893 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1894 return err;
1895 return substream->runtime->oss.format;
1896 }
1897
1898 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1899 {
1900 struct snd_pcm_runtime *runtime;
1901
1902 runtime = substream->runtime;
1903 if (subdivide == 0) {
1904 subdivide = runtime->oss.subdivision;
1905 if (subdivide == 0)
1906 subdivide = 1;
1907 return subdivide;
1908 }
1909 if (runtime->oss.subdivision || runtime->oss.fragshift)
1910 return -EINVAL;
1911 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1912 subdivide != 8 && subdivide != 16)
1913 return -EINVAL;
1914 runtime->oss.subdivision = subdivide;
1915 runtime->oss.params = 1;
1916 return subdivide;
1917 }
1918
1919 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1920 {
1921 int err = -EINVAL, idx;
1922
1923 for (idx = 1; idx >= 0; --idx) {
1924 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1925 struct snd_pcm_runtime *runtime;
1926
1927 if (substream == NULL)
1928 continue;
1929 runtime = substream->runtime;
1930 err = lock_params(runtime);
1931 if (err < 0)
1932 return err;
1933 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
1934 unlock_params(runtime);
1935 if (err < 0)
1936 return err;
1937 }
1938 return err;
1939 }
1940
1941 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1942 {
1943 struct snd_pcm_runtime *runtime;
1944 int fragshift;
1945
1946 runtime = substream->runtime;
1947 if (runtime->oss.subdivision || runtime->oss.fragshift)
1948 return -EINVAL;
1949 fragshift = val & 0xffff;
1950 if (fragshift >= 31)
1951 return -EINVAL;
1952 runtime->oss.fragshift = fragshift;
1953 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1954 if (runtime->oss.fragshift < 4) /* < 16 */
1955 runtime->oss.fragshift = 4;
1956 if (runtime->oss.maxfrags < 2)
1957 runtime->oss.maxfrags = 2;
1958 runtime->oss.params = 1;
1959 return 0;
1960 }
1961
1962 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1963 {
1964 int err = -EINVAL, idx;
1965
1966 for (idx = 1; idx >= 0; --idx) {
1967 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1968 struct snd_pcm_runtime *runtime;
1969
1970 if (substream == NULL)
1971 continue;
1972 runtime = substream->runtime;
1973 err = lock_params(runtime);
1974 if (err < 0)
1975 return err;
1976 err = snd_pcm_oss_set_fragment1(substream, val);
1977 unlock_params(runtime);
1978 if (err < 0)
1979 return err;
1980 }
1981 return err;
1982 }
1983
1984 static int snd_pcm_oss_nonblock(struct file * file)
1985 {
1986 spin_lock(&file->f_lock);
1987 file->f_flags |= O_NONBLOCK;
1988 spin_unlock(&file->f_lock);
1989 return 0;
1990 }
1991
1992 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1993 {
1994
1995 if (substream == NULL) {
1996 res &= ~DSP_CAP_DUPLEX;
1997 return res;
1998 }
1999 #ifdef DSP_CAP_MULTI
2000 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2001 if (substream->pstr->substream_count > 1)
2002 res |= DSP_CAP_MULTI;
2003 #endif
2004 /* DSP_CAP_REALTIME is set all times: */
2005 /* all ALSA drivers can return actual pointer in ring buffer */
2006 #if defined(DSP_CAP_REALTIME) && 0
2007 {
2008 struct snd_pcm_runtime *runtime = substream->runtime;
2009 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2010 res &= ~DSP_CAP_REALTIME;
2011 }
2012 #endif
2013 return res;
2014 }
2015
2016 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
2017 {
2018 int result, idx;
2019
2020 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2021 for (idx = 0; idx < 2; idx++) {
2022 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
2023 result = snd_pcm_oss_get_caps1(substream, result);
2024 }
2025 result |= 0x0001; /* revision - same as SB AWE 64 */
2026 return result;
2027 }
2028
2029 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2030 snd_pcm_uframes_t hw_ptr)
2031 {
2032 struct snd_pcm_runtime *runtime = substream->runtime;
2033 snd_pcm_uframes_t appl_ptr;
2034 appl_ptr = hw_ptr + runtime->buffer_size;
2035 appl_ptr %= runtime->boundary;
2036 runtime->control->appl_ptr = appl_ptr;
2037 }
2038
2039 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
2040 {
2041 struct snd_pcm_runtime *runtime;
2042 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2043 int err, cmd;
2044
2045 #ifdef OSS_DEBUG
2046 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
2047 #endif
2048
2049 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2050 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2051
2052 if (psubstream) {
2053 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2054 return err;
2055 }
2056 if (csubstream) {
2057 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2058 return err;
2059 }
2060 if (psubstream) {
2061 runtime = psubstream->runtime;
2062 cmd = 0;
2063 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2064 return -ERESTARTSYS;
2065 if (trigger & PCM_ENABLE_OUTPUT) {
2066 if (runtime->oss.trigger)
2067 goto _skip1;
2068 if (atomic_read(&psubstream->mmap_count))
2069 snd_pcm_oss_simulate_fill(psubstream,
2070 get_hw_ptr_period(runtime));
2071 runtime->oss.trigger = 1;
2072 runtime->start_threshold = 1;
2073 cmd = SNDRV_PCM_IOCTL_START;
2074 } else {
2075 if (!runtime->oss.trigger)
2076 goto _skip1;
2077 runtime->oss.trigger = 0;
2078 runtime->start_threshold = runtime->boundary;
2079 cmd = SNDRV_PCM_IOCTL_DROP;
2080 runtime->oss.prepare = 1;
2081 }
2082 _skip1:
2083 mutex_unlock(&runtime->oss.params_lock);
2084 if (cmd) {
2085 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2086 if (err < 0)
2087 return err;
2088 }
2089 }
2090 if (csubstream) {
2091 runtime = csubstream->runtime;
2092 cmd = 0;
2093 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2094 return -ERESTARTSYS;
2095 if (trigger & PCM_ENABLE_INPUT) {
2096 if (runtime->oss.trigger)
2097 goto _skip2;
2098 runtime->oss.trigger = 1;
2099 runtime->start_threshold = 1;
2100 cmd = SNDRV_PCM_IOCTL_START;
2101 } else {
2102 if (!runtime->oss.trigger)
2103 goto _skip2;
2104 runtime->oss.trigger = 0;
2105 runtime->start_threshold = runtime->boundary;
2106 cmd = SNDRV_PCM_IOCTL_DROP;
2107 runtime->oss.prepare = 1;
2108 }
2109 _skip2:
2110 mutex_unlock(&runtime->oss.params_lock);
2111 if (cmd) {
2112 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2113 if (err < 0)
2114 return err;
2115 }
2116 }
2117 return 0;
2118 }
2119
2120 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
2121 {
2122 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2123 int result = 0;
2124
2125 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2126 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2127 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2128 result |= PCM_ENABLE_OUTPUT;
2129 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2130 result |= PCM_ENABLE_INPUT;
2131 return result;
2132 }
2133
2134 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
2135 {
2136 struct snd_pcm_substream *substream;
2137 struct snd_pcm_runtime *runtime;
2138 snd_pcm_sframes_t delay;
2139 int err;
2140
2141 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2142 if (substream == NULL)
2143 return -EINVAL;
2144 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2145 return err;
2146 runtime = substream->runtime;
2147 if (runtime->oss.params || runtime->oss.prepare)
2148 return 0;
2149 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2150 if (err == -EPIPE)
2151 delay = 0; /* hack for broken OSS applications */
2152 else if (err < 0)
2153 return err;
2154 return snd_pcm_oss_bytes(substream, delay);
2155 }
2156
2157 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
2158 {
2159 struct snd_pcm_substream *substream;
2160 struct snd_pcm_runtime *runtime;
2161 snd_pcm_sframes_t delay;
2162 int fixup;
2163 struct count_info info;
2164 int err;
2165
2166 if (_info == NULL)
2167 return -EFAULT;
2168 substream = pcm_oss_file->streams[stream];
2169 if (substream == NULL)
2170 return -EINVAL;
2171 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2172 return err;
2173 runtime = substream->runtime;
2174 if (runtime->oss.params || runtime->oss.prepare) {
2175 memset(&info, 0, sizeof(info));
2176 if (copy_to_user(_info, &info, sizeof(info)))
2177 return -EFAULT;
2178 return 0;
2179 }
2180 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2181 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2182 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2183 err = 0;
2184 delay = 0;
2185 fixup = 0;
2186 } else {
2187 fixup = runtime->oss.buffer_used;
2188 }
2189 } else {
2190 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2191 fixup = -runtime->oss.buffer_used;
2192 }
2193 if (err < 0)
2194 return err;
2195 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
2196 if (atomic_read(&substream->mmap_count)) {
2197 snd_pcm_sframes_t n;
2198 delay = get_hw_ptr_period(runtime);
2199 n = delay - runtime->oss.prev_hw_ptr_period;
2200 if (n < 0)
2201 n += runtime->boundary;
2202 info.blocks = n / runtime->period_size;
2203 runtime->oss.prev_hw_ptr_period = delay;
2204 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2205 snd_pcm_oss_simulate_fill(substream, delay);
2206 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2207 } else {
2208 delay = snd_pcm_oss_bytes(substream, delay);
2209 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2210 if (substream->oss.setup.buggyptr)
2211 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2212 else
2213 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
2214 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
2215 } else {
2216 delay += fixup;
2217 info.blocks = delay / runtime->oss.period_bytes;
2218 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
2219 }
2220 }
2221 if (copy_to_user(_info, &info, sizeof(info)))
2222 return -EFAULT;
2223 return 0;
2224 }
2225
2226 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
2227 {
2228 struct snd_pcm_substream *substream;
2229 struct snd_pcm_runtime *runtime;
2230 snd_pcm_sframes_t avail;
2231 int fixup;
2232 struct audio_buf_info info;
2233 int err;
2234
2235 if (_info == NULL)
2236 return -EFAULT;
2237 substream = pcm_oss_file->streams[stream];
2238 if (substream == NULL)
2239 return -EINVAL;
2240 runtime = substream->runtime;
2241
2242 if (runtime->oss.params &&
2243 (err = snd_pcm_oss_change_params(substream, false)) < 0)
2244 return err;
2245
2246 info.fragsize = runtime->oss.period_bytes;
2247 info.fragstotal = runtime->periods;
2248 if (runtime->oss.prepare) {
2249 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2250 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2251 info.fragments = runtime->oss.periods;
2252 } else {
2253 info.bytes = 0;
2254 info.fragments = 0;
2255 }
2256 } else {
2257 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2258 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2259 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2260 avail = runtime->buffer_size;
2261 err = 0;
2262 fixup = 0;
2263 } else {
2264 avail = runtime->buffer_size - avail;
2265 fixup = -runtime->oss.buffer_used;
2266 }
2267 } else {
2268 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2269 fixup = runtime->oss.buffer_used;
2270 }
2271 if (err < 0)
2272 return err;
2273 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2274 info.fragments = info.bytes / runtime->oss.period_bytes;
2275 }
2276
2277 #ifdef OSS_DEBUG
2278 pcm_dbg(substream->pcm,
2279 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2280 info.bytes, info.fragments, info.fragstotal, info.fragsize);
2281 #endif
2282 if (copy_to_user(_info, &info, sizeof(info)))
2283 return -EFAULT;
2284 return 0;
2285 }
2286
2287 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
2288 {
2289 // it won't be probably implemented
2290 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
2291 return -EINVAL;
2292 }
2293
2294 static const char *strip_task_path(const char *path)
2295 {
2296 const char *ptr, *ptrl = NULL;
2297 for (ptr = path; *ptr; ptr++) {
2298 if (*ptr == '/')
2299 ptrl = ptr + 1;
2300 }
2301 return ptrl;
2302 }
2303
2304 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2305 const char *task_name,
2306 struct snd_pcm_oss_setup *rsetup)
2307 {
2308 struct snd_pcm_oss_setup *setup;
2309
2310 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2311 do {
2312 for (setup = pcm->streams[stream].oss.setup_list; setup;
2313 setup = setup->next) {
2314 if (!strcmp(setup->task_name, task_name))
2315 goto out;
2316 }
2317 } while ((task_name = strip_task_path(task_name)) != NULL);
2318 out:
2319 if (setup)
2320 *rsetup = *setup;
2321 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
2322 }
2323
2324 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2325 {
2326 struct snd_pcm_runtime *runtime;
2327 runtime = substream->runtime;
2328 kvfree(runtime->oss.buffer);
2329 runtime->oss.buffer = NULL;
2330 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2331 snd_pcm_oss_plugin_clear(substream);
2332 #endif
2333 substream->oss.oss = 0;
2334 }
2335
2336 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2337 struct snd_pcm_oss_setup *setup,
2338 int minor)
2339 {
2340 struct snd_pcm_runtime *runtime;
2341
2342 substream->oss.oss = 1;
2343 substream->oss.setup = *setup;
2344 if (setup->nonblock)
2345 substream->f_flags |= O_NONBLOCK;
2346 else if (setup->block)
2347 substream->f_flags &= ~O_NONBLOCK;
2348 runtime = substream->runtime;
2349 runtime->oss.params = 1;
2350 runtime->oss.trigger = 1;
2351 runtime->oss.rate = 8000;
2352 mutex_init(&runtime->oss.params_lock);
2353 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2354 case SNDRV_MINOR_OSS_PCM_8:
2355 runtime->oss.format = AFMT_U8;
2356 break;
2357 case SNDRV_MINOR_OSS_PCM_16:
2358 runtime->oss.format = AFMT_S16_LE;
2359 break;
2360 default:
2361 runtime->oss.format = AFMT_MU_LAW;
2362 }
2363 runtime->oss.channels = 1;
2364 runtime->oss.fragshift = 0;
2365 runtime->oss.maxfrags = 0;
2366 runtime->oss.subdivision = 0;
2367 substream->pcm_release = snd_pcm_oss_release_substream;
2368 atomic_set(&runtime->oss.rw_ref, 0);
2369 }
2370
2371 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
2372 {
2373 int cidx;
2374 if (!pcm_oss_file)
2375 return 0;
2376 for (cidx = 0; cidx < 2; ++cidx) {
2377 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
2378 if (substream)
2379 snd_pcm_release_substream(substream);
2380 }
2381 kfree(pcm_oss_file);
2382 return 0;
2383 }
2384
2385 static int snd_pcm_oss_open_file(struct file *file,
2386 struct snd_pcm *pcm,
2387 struct snd_pcm_oss_file **rpcm_oss_file,
2388 int minor,
2389 struct snd_pcm_oss_setup *setup)
2390 {
2391 int idx, err;
2392 struct snd_pcm_oss_file *pcm_oss_file;
2393 struct snd_pcm_substream *substream;
2394 fmode_t f_mode = file->f_mode;
2395
2396 if (rpcm_oss_file)
2397 *rpcm_oss_file = NULL;
2398
2399 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
2400 if (pcm_oss_file == NULL)
2401 return -ENOMEM;
2402
2403 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2404 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2405 f_mode = FMODE_WRITE;
2406
2407 file->f_flags &= ~O_APPEND;
2408 for (idx = 0; idx < 2; idx++) {
2409 if (setup[idx].disable)
2410 continue;
2411 if (! pcm->streams[idx].substream_count)
2412 continue; /* no matching substream */
2413 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2414 if (! (f_mode & FMODE_WRITE))
2415 continue;
2416 } else {
2417 if (! (f_mode & FMODE_READ))
2418 continue;
2419 }
2420 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2421 if (err < 0) {
2422 snd_pcm_oss_release_file(pcm_oss_file);
2423 return err;
2424 }
2425
2426 pcm_oss_file->streams[idx] = substream;
2427 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
2428 }
2429
2430 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
2431 snd_pcm_oss_release_file(pcm_oss_file);
2432 return -EINVAL;
2433 }
2434
2435 file->private_data = pcm_oss_file;
2436 if (rpcm_oss_file)
2437 *rpcm_oss_file = pcm_oss_file;
2438 return 0;
2439 }
2440
2441
2442 static int snd_task_name(struct task_struct *task, char *name, size_t size)
2443 {
2444 unsigned int idx;
2445
2446 if (snd_BUG_ON(!task || !name || size < 2))
2447 return -EINVAL;
2448 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2449 name[idx] = task->comm[idx];
2450 name[idx] = '\0';
2451 return 0;
2452 }
2453
2454 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2455 {
2456 int err;
2457 char task_name[32];
2458 struct snd_pcm *pcm;
2459 struct snd_pcm_oss_file *pcm_oss_file;
2460 struct snd_pcm_oss_setup setup[2];
2461 int nonblock;
2462 wait_queue_entry_t wait;
2463
2464 err = nonseekable_open(inode, file);
2465 if (err < 0)
2466 return err;
2467
2468 pcm = snd_lookup_oss_minor_data(iminor(inode),
2469 SNDRV_OSS_DEVICE_TYPE_PCM);
2470 if (pcm == NULL) {
2471 err = -ENODEV;
2472 goto __error1;
2473 }
2474 err = snd_card_file_add(pcm->card, file);
2475 if (err < 0)
2476 goto __error1;
2477 if (!try_module_get(pcm->card->module)) {
2478 err = -EFAULT;
2479 goto __error2;
2480 }
2481 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2482 err = -EFAULT;
2483 goto __error;
2484 }
2485 memset(setup, 0, sizeof(setup));
2486 if (file->f_mode & FMODE_WRITE)
2487 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2488 task_name, &setup[0]);
2489 if (file->f_mode & FMODE_READ)
2490 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2491 task_name, &setup[1]);
2492
2493 nonblock = !!(file->f_flags & O_NONBLOCK);
2494 if (!nonblock)
2495 nonblock = nonblock_open;
2496
2497 init_waitqueue_entry(&wait, current);
2498 add_wait_queue(&pcm->open_wait, &wait);
2499 mutex_lock(&pcm->open_mutex);
2500 while (1) {
2501 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
2502 iminor(inode), setup);
2503 if (err >= 0)
2504 break;
2505 if (err == -EAGAIN) {
2506 if (nonblock) {
2507 err = -EBUSY;
2508 break;
2509 }
2510 } else
2511 break;
2512 set_current_state(TASK_INTERRUPTIBLE);
2513 mutex_unlock(&pcm->open_mutex);
2514 schedule();
2515 mutex_lock(&pcm->open_mutex);
2516 if (pcm->card->shutdown) {
2517 err = -ENODEV;
2518 break;
2519 }
2520 if (signal_pending(current)) {
2521 err = -ERESTARTSYS;
2522 break;
2523 }
2524 }
2525 remove_wait_queue(&pcm->open_wait, &wait);
2526 mutex_unlock(&pcm->open_mutex);
2527 if (err < 0)
2528 goto __error;
2529 snd_card_unref(pcm->card);
2530 return err;
2531
2532 __error:
2533 module_put(pcm->card->module);
2534 __error2:
2535 snd_card_file_remove(pcm->card, file);
2536 __error1:
2537 if (pcm)
2538 snd_card_unref(pcm->card);
2539 return err;
2540 }
2541
2542 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2543 {
2544 struct snd_pcm *pcm;
2545 struct snd_pcm_substream *substream;
2546 struct snd_pcm_oss_file *pcm_oss_file;
2547
2548 pcm_oss_file = file->private_data;
2549 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2550 if (substream == NULL)
2551 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2552 if (snd_BUG_ON(!substream))
2553 return -ENXIO;
2554 pcm = substream->pcm;
2555 if (!pcm->card->shutdown)
2556 snd_pcm_oss_sync(pcm_oss_file);
2557 mutex_lock(&pcm->open_mutex);
2558 snd_pcm_oss_release_file(pcm_oss_file);
2559 mutex_unlock(&pcm->open_mutex);
2560 wake_up(&pcm->open_wait);
2561 module_put(pcm->card->module);
2562 snd_card_file_remove(pcm->card, file);
2563 return 0;
2564 }
2565
2566 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2567 {
2568 struct snd_pcm_oss_file *pcm_oss_file;
2569 int __user *p = (int __user *)arg;
2570 int res;
2571
2572 pcm_oss_file = file->private_data;
2573 if (cmd == OSS_GETVERSION)
2574 return put_user(SNDRV_OSS_VERSION, p);
2575 if (cmd == OSS_ALSAEMULVER)
2576 return put_user(1, p);
2577 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
2578 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
2579 struct snd_pcm_substream *substream;
2580 int idx;
2581 for (idx = 0; idx < 2; ++idx) {
2582 substream = pcm_oss_file->streams[idx];
2583 if (substream != NULL)
2584 break;
2585 }
2586 if (snd_BUG_ON(idx >= 2))
2587 return -ENXIO;
2588 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2589 }
2590 #endif
2591 if (((cmd >> 8) & 0xff) != 'P')
2592 return -EINVAL;
2593 #ifdef OSS_DEBUG
2594 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
2595 #endif
2596 switch (cmd) {
2597 case SNDCTL_DSP_RESET:
2598 return snd_pcm_oss_reset(pcm_oss_file);
2599 case SNDCTL_DSP_SYNC:
2600 return snd_pcm_oss_sync(pcm_oss_file);
2601 case SNDCTL_DSP_SPEED:
2602 if (get_user(res, p))
2603 return -EFAULT;
2604 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2605 return res;
2606 return put_user(res, p);
2607 case SOUND_PCM_READ_RATE:
2608 res = snd_pcm_oss_get_rate(pcm_oss_file);
2609 if (res < 0)
2610 return res;
2611 return put_user(res, p);
2612 case SNDCTL_DSP_STEREO:
2613 if (get_user(res, p))
2614 return -EFAULT;
2615 res = res > 0 ? 2 : 1;
2616 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2617 return res;
2618 return put_user(--res, p);
2619 case SNDCTL_DSP_GETBLKSIZE:
2620 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2621 if (res < 0)
2622 return res;
2623 return put_user(res, p);
2624 case SNDCTL_DSP_SETFMT:
2625 if (get_user(res, p))
2626 return -EFAULT;
2627 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2628 if (res < 0)
2629 return res;
2630 return put_user(res, p);
2631 case SOUND_PCM_READ_BITS:
2632 res = snd_pcm_oss_get_format(pcm_oss_file);
2633 if (res < 0)
2634 return res;
2635 return put_user(res, p);
2636 case SNDCTL_DSP_CHANNELS:
2637 if (get_user(res, p))
2638 return -EFAULT;
2639 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2640 if (res < 0)
2641 return res;
2642 return put_user(res, p);
2643 case SOUND_PCM_READ_CHANNELS:
2644 res = snd_pcm_oss_get_channels(pcm_oss_file);
2645 if (res < 0)
2646 return res;
2647 return put_user(res, p);
2648 case SOUND_PCM_WRITE_FILTER:
2649 case SOUND_PCM_READ_FILTER:
2650 return -EIO;
2651 case SNDCTL_DSP_POST:
2652 return snd_pcm_oss_post(pcm_oss_file);
2653 case SNDCTL_DSP_SUBDIVIDE:
2654 if (get_user(res, p))
2655 return -EFAULT;
2656 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2657 if (res < 0)
2658 return res;
2659 return put_user(res, p);
2660 case SNDCTL_DSP_SETFRAGMENT:
2661 if (get_user(res, p))
2662 return -EFAULT;
2663 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2664 case SNDCTL_DSP_GETFMTS:
2665 res = snd_pcm_oss_get_formats(pcm_oss_file);
2666 if (res < 0)
2667 return res;
2668 return put_user(res, p);
2669 case SNDCTL_DSP_GETOSPACE:
2670 case SNDCTL_DSP_GETISPACE:
2671 return snd_pcm_oss_get_space(pcm_oss_file,
2672 cmd == SNDCTL_DSP_GETISPACE ?
2673 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2674 (struct audio_buf_info __user *) arg);
2675 case SNDCTL_DSP_NONBLOCK:
2676 return snd_pcm_oss_nonblock(file);
2677 case SNDCTL_DSP_GETCAPS:
2678 res = snd_pcm_oss_get_caps(pcm_oss_file);
2679 if (res < 0)
2680 return res;
2681 return put_user(res, p);
2682 case SNDCTL_DSP_GETTRIGGER:
2683 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2684 if (res < 0)
2685 return res;
2686 return put_user(res, p);
2687 case SNDCTL_DSP_SETTRIGGER:
2688 if (get_user(res, p))
2689 return -EFAULT;
2690 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2691 case SNDCTL_DSP_GETIPTR:
2692 case SNDCTL_DSP_GETOPTR:
2693 return snd_pcm_oss_get_ptr(pcm_oss_file,
2694 cmd == SNDCTL_DSP_GETIPTR ?
2695 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2696 (struct count_info __user *) arg);
2697 case SNDCTL_DSP_MAPINBUF:
2698 case SNDCTL_DSP_MAPOUTBUF:
2699 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2700 cmd == SNDCTL_DSP_MAPINBUF ?
2701 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2702 (struct buffmem_desc __user *) arg);
2703 case SNDCTL_DSP_SETSYNCRO:
2704 /* stop DMA now.. */
2705 return 0;
2706 case SNDCTL_DSP_SETDUPLEX:
2707 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2708 return 0;
2709 return -EIO;
2710 case SNDCTL_DSP_GETODELAY:
2711 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2712 if (res < 0) {
2713 /* it's for sure, some broken apps don't check for error codes */
2714 put_user(0, p);
2715 return res;
2716 }
2717 return put_user(res, p);
2718 case SNDCTL_DSP_PROFILE:
2719 return 0; /* silently ignore */
2720 default:
2721 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
2722 }
2723 return -EINVAL;
2724 }
2725
2726 #ifdef CONFIG_COMPAT
2727 /* all compatible */
2728 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2729 unsigned long arg)
2730 {
2731 /*
2732 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2733 * which are not implemented for the native case either
2734 */
2735 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2736 }
2737 #else
2738 #define snd_pcm_oss_ioctl_compat NULL
2739 #endif
2740
2741 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2742 {
2743 struct snd_pcm_oss_file *pcm_oss_file;
2744 struct snd_pcm_substream *substream;
2745
2746 pcm_oss_file = file->private_data;
2747 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2748 if (substream == NULL)
2749 return -ENXIO;
2750 substream->f_flags = file->f_flags & O_NONBLOCK;
2751 #ifndef OSS_DEBUG
2752 return snd_pcm_oss_read1(substream, buf, count);
2753 #else
2754 {
2755 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2756 pcm_dbg(substream->pcm,
2757 "pcm_oss: read %li bytes (returned %li bytes)\n",
2758 (long)count, (long)res);
2759 return res;
2760 }
2761 #endif
2762 }
2763
2764 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2765 {
2766 struct snd_pcm_oss_file *pcm_oss_file;
2767 struct snd_pcm_substream *substream;
2768 long result;
2769
2770 pcm_oss_file = file->private_data;
2771 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2772 if (substream == NULL)
2773 return -ENXIO;
2774 substream->f_flags = file->f_flags & O_NONBLOCK;
2775 result = snd_pcm_oss_write1(substream, buf, count);
2776 #ifdef OSS_DEBUG
2777 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
2778 (long)count, (long)result);
2779 #endif
2780 return result;
2781 }
2782
2783 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2784 {
2785 struct snd_pcm_runtime *runtime = substream->runtime;
2786 if (atomic_read(&substream->mmap_count))
2787 return runtime->oss.prev_hw_ptr_period !=
2788 get_hw_ptr_period(runtime);
2789 else
2790 return snd_pcm_playback_avail(runtime) >=
2791 runtime->oss.period_frames;
2792 }
2793
2794 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2795 {
2796 struct snd_pcm_runtime *runtime = substream->runtime;
2797 if (atomic_read(&substream->mmap_count))
2798 return runtime->oss.prev_hw_ptr_period !=
2799 get_hw_ptr_period(runtime);
2800 else
2801 return snd_pcm_capture_avail(runtime) >=
2802 runtime->oss.period_frames;
2803 }
2804
2805 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
2806 {
2807 struct snd_pcm_oss_file *pcm_oss_file;
2808 __poll_t mask;
2809 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2810
2811 pcm_oss_file = file->private_data;
2812
2813 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2814 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2815
2816 mask = 0;
2817 if (psubstream != NULL) {
2818 struct snd_pcm_runtime *runtime = psubstream->runtime;
2819 poll_wait(file, &runtime->sleep, wait);
2820 snd_pcm_stream_lock_irq(psubstream);
2821 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2822 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2823 snd_pcm_oss_playback_ready(psubstream)))
2824 mask |= EPOLLOUT | EPOLLWRNORM;
2825 snd_pcm_stream_unlock_irq(psubstream);
2826 }
2827 if (csubstream != NULL) {
2828 struct snd_pcm_runtime *runtime = csubstream->runtime;
2829 snd_pcm_state_t ostate;
2830 poll_wait(file, &runtime->sleep, wait);
2831 snd_pcm_stream_lock_irq(csubstream);
2832 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2833 snd_pcm_oss_capture_ready(csubstream))
2834 mask |= EPOLLIN | EPOLLRDNORM;
2835 snd_pcm_stream_unlock_irq(csubstream);
2836 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2837 struct snd_pcm_oss_file ofile;
2838 memset(&ofile, 0, sizeof(ofile));
2839 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2840 runtime->oss.trigger = 0;
2841 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2842 }
2843 }
2844
2845 return mask;
2846 }
2847
2848 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2849 {
2850 struct snd_pcm_oss_file *pcm_oss_file;
2851 struct snd_pcm_substream *substream = NULL;
2852 struct snd_pcm_runtime *runtime;
2853 int err;
2854
2855 #ifdef OSS_DEBUG
2856 pr_debug("pcm_oss: mmap begin\n");
2857 #endif
2858 pcm_oss_file = file->private_data;
2859 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2860 case VM_READ | VM_WRITE:
2861 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2862 if (substream)
2863 break;
2864 fallthrough;
2865 case VM_READ:
2866 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2867 break;
2868 case VM_WRITE:
2869 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2870 break;
2871 default:
2872 return -EINVAL;
2873 }
2874 /* set VM_READ access as well to fix memset() routines that do
2875 reads before writes (to improve performance) */
2876 area->vm_flags |= VM_READ;
2877 if (substream == NULL)
2878 return -ENXIO;
2879 runtime = substream->runtime;
2880 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2881 return -EIO;
2882 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2883 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2884 else
2885 return -EIO;
2886
2887 if (runtime->oss.params) {
2888 /* use mutex_trylock() for params_lock for avoiding a deadlock
2889 * between mmap_lock and params_lock taken by
2890 * copy_from/to_user() in snd_pcm_oss_write/read()
2891 */
2892 err = snd_pcm_oss_change_params(substream, true);
2893 if (err < 0)
2894 return err;
2895 }
2896 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2897 if (runtime->oss.plugin_first != NULL)
2898 return -EIO;
2899 #endif
2900
2901 if (area->vm_pgoff != 0)
2902 return -EINVAL;
2903
2904 err = snd_pcm_mmap_data(substream, file, area);
2905 if (err < 0)
2906 return err;
2907 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2908 runtime->silence_threshold = 0;
2909 runtime->silence_size = 0;
2910 #ifdef OSS_DEBUG
2911 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
2912 runtime->oss.mmap_bytes);
2913 #endif
2914 /* In mmap mode we never stop */
2915 runtime->stop_threshold = runtime->boundary;
2916
2917 return 0;
2918 }
2919
2920 #ifdef CONFIG_SND_VERBOSE_PROCFS
2921 /*
2922 * /proc interface
2923 */
2924
2925 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2926 struct snd_info_buffer *buffer)
2927 {
2928 struct snd_pcm_str *pstr = entry->private_data;
2929 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2930 mutex_lock(&pstr->oss.setup_mutex);
2931 while (setup) {
2932 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2933 setup->task_name,
2934 setup->periods,
2935 setup->period_size,
2936 setup->disable ? " disable" : "",
2937 setup->direct ? " direct" : "",
2938 setup->block ? " block" : "",
2939 setup->nonblock ? " non-block" : "",
2940 setup->partialfrag ? " partial-frag" : "",
2941 setup->nosilence ? " no-silence" : "");
2942 setup = setup->next;
2943 }
2944 mutex_unlock(&pstr->oss.setup_mutex);
2945 }
2946
2947 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2948 {
2949 struct snd_pcm_oss_setup *setup, *setupn;
2950
2951 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2952 setup; setup = setupn) {
2953 setupn = setup->next;
2954 kfree(setup->task_name);
2955 kfree(setup);
2956 }
2957 pstr->oss.setup_list = NULL;
2958 }
2959
2960 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2961 struct snd_info_buffer *buffer)
2962 {
2963 struct snd_pcm_str *pstr = entry->private_data;
2964 char line[128], str[32], task_name[32];
2965 const char *ptr;
2966 int idx1;
2967 struct snd_pcm_oss_setup *setup, *setup1, template;
2968
2969 while (!snd_info_get_line(buffer, line, sizeof(line))) {
2970 mutex_lock(&pstr->oss.setup_mutex);
2971 memset(&template, 0, sizeof(template));
2972 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2973 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2974 snd_pcm_oss_proc_free_setup_list(pstr);
2975 mutex_unlock(&pstr->oss.setup_mutex);
2976 continue;
2977 }
2978 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2979 if (!strcmp(setup->task_name, task_name)) {
2980 template = *setup;
2981 break;
2982 }
2983 }
2984 ptr = snd_info_get_str(str, ptr, sizeof(str));
2985 template.periods = simple_strtoul(str, NULL, 10);
2986 ptr = snd_info_get_str(str, ptr, sizeof(str));
2987 template.period_size = simple_strtoul(str, NULL, 10);
2988 for (idx1 = 31; idx1 >= 0; idx1--)
2989 if (template.period_size & (1 << idx1))
2990 break;
2991 for (idx1--; idx1 >= 0; idx1--)
2992 template.period_size &= ~(1 << idx1);
2993 do {
2994 ptr = snd_info_get_str(str, ptr, sizeof(str));
2995 if (!strcmp(str, "disable")) {
2996 template.disable = 1;
2997 } else if (!strcmp(str, "direct")) {
2998 template.direct = 1;
2999 } else if (!strcmp(str, "block")) {
3000 template.block = 1;
3001 } else if (!strcmp(str, "non-block")) {
3002 template.nonblock = 1;
3003 } else if (!strcmp(str, "partial-frag")) {
3004 template.partialfrag = 1;
3005 } else if (!strcmp(str, "no-silence")) {
3006 template.nosilence = 1;
3007 } else if (!strcmp(str, "buggy-ptr")) {
3008 template.buggyptr = 1;
3009 }
3010 } while (*str);
3011 if (setup == NULL) {
3012 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3013 if (! setup) {
3014 buffer->error = -ENOMEM;
3015 mutex_unlock(&pstr->oss.setup_mutex);
3016 return;
3017 }
3018 if (pstr->oss.setup_list == NULL)
3019 pstr->oss.setup_list = setup;
3020 else {
3021 for (setup1 = pstr->oss.setup_list;
3022 setup1->next; setup1 = setup1->next);
3023 setup1->next = setup;
3024 }
3025 template.task_name = kstrdup(task_name, GFP_KERNEL);
3026 if (! template.task_name) {
3027 kfree(setup);
3028 buffer->error = -ENOMEM;
3029 mutex_unlock(&pstr->oss.setup_mutex);
3030 return;
3031 }
3032 }
3033 *setup = template;
3034 mutex_unlock(&pstr->oss.setup_mutex);
3035 }
3036 }
3037
3038 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
3039 {
3040 int stream;
3041 for (stream = 0; stream < 2; ++stream) {
3042 struct snd_info_entry *entry;
3043 struct snd_pcm_str *pstr = &pcm->streams[stream];
3044 if (pstr->substream_count == 0)
3045 continue;
3046 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3047 entry->content = SNDRV_INFO_CONTENT_TEXT;
3048 entry->mode = S_IFREG | 0644;
3049 entry->c.text.read = snd_pcm_oss_proc_read;
3050 entry->c.text.write = snd_pcm_oss_proc_write;
3051 entry->private_data = pstr;
3052 if (snd_info_register(entry) < 0) {
3053 snd_info_free_entry(entry);
3054 entry = NULL;
3055 }
3056 }
3057 pstr->oss.proc_entry = entry;
3058 }
3059 }
3060
3061 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
3062 {
3063 int stream;
3064 for (stream = 0; stream < 2; ++stream) {
3065 struct snd_pcm_str *pstr = &pcm->streams[stream];
3066 snd_info_free_entry(pstr->oss.proc_entry);
3067 pstr->oss.proc_entry = NULL;
3068 snd_pcm_oss_proc_free_setup_list(pstr);
3069 }
3070 }
3071 #else /* !CONFIG_SND_VERBOSE_PROCFS */
3072 #define snd_pcm_oss_proc_init(pcm)
3073 #define snd_pcm_oss_proc_done(pcm)
3074 #endif /* CONFIG_SND_VERBOSE_PROCFS */
3075
3076 /*
3077 * ENTRY functions
3078 */
3079
3080 static const struct file_operations snd_pcm_oss_f_reg =
3081 {
3082 .owner = THIS_MODULE,
3083 .read = snd_pcm_oss_read,
3084 .write = snd_pcm_oss_write,
3085 .open = snd_pcm_oss_open,
3086 .release = snd_pcm_oss_release,
3087 .llseek = no_llseek,
3088 .poll = snd_pcm_oss_poll,
3089 .unlocked_ioctl = snd_pcm_oss_ioctl,
3090 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3091 .mmap = snd_pcm_oss_mmap,
3092 };
3093
3094 static void register_oss_dsp(struct snd_pcm *pcm, int index)
3095 {
3096 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3097 pcm->card, index, &snd_pcm_oss_f_reg,
3098 pcm) < 0) {
3099 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
3100 pcm->card->number, pcm->device);
3101 }
3102 }
3103
3104 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
3105 {
3106 pcm->oss.reg = 0;
3107 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3108 char name[128];
3109 int duplex;
3110 register_oss_dsp(pcm, 0);
3111 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3112 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3113 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3114 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3115 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3116 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3117 pcm->card->number,
3118 name);
3119 #endif
3120 pcm->oss.reg++;
3121 pcm->oss.reg_mask |= 1;
3122 }
3123 if (adsp_map[pcm->card->number] == (int)pcm->device) {
3124 register_oss_dsp(pcm, 1);
3125 pcm->oss.reg++;
3126 pcm->oss.reg_mask |= 2;
3127 }
3128
3129 if (pcm->oss.reg)
3130 snd_pcm_oss_proc_init(pcm);
3131
3132 return 0;
3133 }
3134
3135 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
3136 {
3137 if (pcm->oss.reg) {
3138 if (pcm->oss.reg_mask & 1) {
3139 pcm->oss.reg_mask &= ~1;
3140 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3141 pcm->card, 0);
3142 }
3143 if (pcm->oss.reg_mask & 2) {
3144 pcm->oss.reg_mask &= ~2;
3145 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3146 pcm->card, 1);
3147 }
3148 if (dsp_map[pcm->card->number] == (int)pcm->device) {
3149 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
3150 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3151 #endif
3152 }
3153 pcm->oss.reg = 0;
3154 }
3155 return 0;
3156 }
3157
3158 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3159 {
3160 snd_pcm_oss_disconnect_minor(pcm);
3161 snd_pcm_oss_proc_done(pcm);
3162 return 0;
3163 }
3164
3165 static struct snd_pcm_notify snd_pcm_oss_notify =
3166 {
3167 .n_register = snd_pcm_oss_register_minor,
3168 .n_disconnect = snd_pcm_oss_disconnect_minor,
3169 .n_unregister = snd_pcm_oss_unregister_minor,
3170 };
3171
3172 static int __init alsa_pcm_oss_init(void)
3173 {
3174 int i;
3175 int err;
3176
3177 /* check device map table */
3178 for (i = 0; i < SNDRV_CARDS; i++) {
3179 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
3180 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
3181 i, dsp_map[i]);
3182 dsp_map[i] = 0;
3183 }
3184 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
3185 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
3186 i, adsp_map[i]);
3187 adsp_map[i] = 1;
3188 }
3189 }
3190 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3191 return err;
3192 return 0;
3193 }
3194
3195 static void __exit alsa_pcm_oss_exit(void)
3196 {
3197 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3198 }
3199
3200 module_init(alsa_pcm_oss_init)
3201 module_exit(alsa_pcm_oss_exit)
Linux with added FPC-III support