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[mirror_ubuntu-artful-kernel.git] / sound / core / oss / pcm_oss.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
1da177e4 29#include <linux/init.h>
1da177e4 30#include <linux/slab.h>
174cd4b1 31#include <linux/sched/signal.h>
1da177e4
LT		 32#include <linux/time.h>
33#include <linux/vmalloc.h>
65a77217 34#include <linux/module.h>
3f7440a6 35#include <linux/math64.h>
543537bd 36#include <linux/string.h>
83266b6b 37#include <linux/compat.h>
1da177e4
LT		 38#include <sound/core.h>
39#include <sound/minors.h>
40#include <sound/pcm.h>
41#include <sound/pcm_params.h>
42#include "pcm_plugin.h"
43#include <sound/info.h>
44#include <linux/soundcard.h>
45#include <sound/initval.h>
fea952e5 46#include <sound/mixer_oss.h>
1da177e4
LT		 47
48#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
49
6581f4e7 50static int dsp_map[SNDRV_CARDS];
1da177e4 51static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
a67ff6a5 52static bool nonblock_open = 1;
1da177e4 53
c1017a4c 54MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
1da177e4
LT		 55MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
56MODULE_LICENSE("GPL");
57module_param_array(dsp_map, int, NULL, 0444);
58MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
59module_param_array(adsp_map, int, NULL, 0444);
60MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
61module_param(nonblock_open, bool, 0644);
62MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
63MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
64MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
65
6ac77bc1
TI		 66static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
67static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
68static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
1da177e4
LT		 69
70static inline mm_segment_t snd_enter_user(void)
71{
72 mm_segment_t fs = get_fs();
73 set_fs(get_ds());
74 return fs;
75}
76
77static inline void snd_leave_user(mm_segment_t fs)
78{
79 set_fs(fs);
80}
81
e88e8ae6
TI		 82/*
83 * helper functions to process hw_params
84 */
85static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
86{
87 int changed = 0;
88 if (i->min < min) {
89 i->min = min;
90 i->openmin = openmin;
91 changed = 1;
92 } else if (i->min == min && !i->openmin && openmin) {
93 i->openmin = 1;
94 changed = 1;
95 }
96 if (i->integer) {
97 if (i->openmin) {
98 i->min++;
99 i->openmin = 0;
100 }
101 }
102 if (snd_interval_checkempty(i)) {
103 snd_interval_none(i);
104 return -EINVAL;
105 }
106 return changed;
107}
108
109static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
110{
111 int changed = 0;
112 if (i->max > max) {
113 i->max = max;
114 i->openmax = openmax;
115 changed = 1;
116 } else if (i->max == max && !i->openmax && openmax) {
117 i->openmax = 1;
118 changed = 1;
119 }
120 if (i->integer) {
121 if (i->openmax) {
122 i->max--;
123 i->openmax = 0;
124 }
125 }
126 if (snd_interval_checkempty(i)) {
127 snd_interval_none(i);
128 return -EINVAL;
129 }
130 return changed;
131}
132
133static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
134{
135 struct snd_interval t;
136 t.empty = 0;
137 t.min = t.max = val;
138 t.openmin = t.openmax = 0;
139 t.integer = 1;
140 return snd_interval_refine(i, &t);
141}
142
143/**
144 * snd_pcm_hw_param_value_min
145 * @params: the hw_params instance
146 * @var: parameter to retrieve
147 * @dir: pointer to the direction (-1,0,1) or NULL
148 *
149 * Return the minimum value for field PAR.
150 */
151static unsigned int
152snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
153 snd_pcm_hw_param_t var, int *dir)
154{
155 if (hw_is_mask(var)) {
156 if (dir)
157 *dir = 0;
158 return snd_mask_min(hw_param_mask_c(params, var));
159 }
160 if (hw_is_interval(var)) {
161 const struct snd_interval *i = hw_param_interval_c(params, var);
162 if (dir)
163 *dir = i->openmin;
164 return snd_interval_min(i);
165 }
166 return -EINVAL;
167}
168
169/**
170 * snd_pcm_hw_param_value_max
171 * @params: the hw_params instance
172 * @var: parameter to retrieve
173 * @dir: pointer to the direction (-1,0,1) or NULL
174 *
175 * Return the maximum value for field PAR.
176 */
177static unsigned int
178snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
179 snd_pcm_hw_param_t var, int *dir)
180{
181 if (hw_is_mask(var)) {
182 if (dir)
183 *dir = 0;
184 return snd_mask_max(hw_param_mask_c(params, var));
185 }
186 if (hw_is_interval(var)) {
187 const struct snd_interval *i = hw_param_interval_c(params, var);
188 if (dir)
189 *dir = - (int) i->openmax;
190 return snd_interval_max(i);
191 }
192 return -EINVAL;
193}
194
195static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
196 snd_pcm_hw_param_t var,
197 const struct snd_mask *val)
198{
199 int changed;
200 changed = snd_mask_refine(hw_param_mask(params, var), val);
201 if (changed) {
202 params->cmask |= 1 << var;
203 params->rmask |= 1 << var;
204 }
205 return changed;
206}
207
208static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
209 struct snd_pcm_hw_params *params,
210 snd_pcm_hw_param_t var,
211 const struct snd_mask *val)
212{
213 int changed = _snd_pcm_hw_param_mask(params, var, val);
214 if (changed < 0)
215 return changed;
216 if (params->rmask) {
217 int err = snd_pcm_hw_refine(pcm, params);
218 if (err < 0)
219 return err;
220 }
221 return 0;
222}
223
224static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
225 snd_pcm_hw_param_t var, unsigned int val,
226 int dir)
227{
228 int changed;
229 int open = 0;
230 if (dir) {
231 if (dir > 0) {
232 open = 1;
233 } else if (dir < 0) {
234 if (val > 0) {
235 open = 1;
236 val--;
237 }
238 }
239 }
240 if (hw_is_mask(var))
241 changed = snd_mask_refine_min(hw_param_mask(params, var),
242 val + !!open);
243 else if (hw_is_interval(var))
244 changed = snd_interval_refine_min(hw_param_interval(params, var),
245 val, open);
246 else
247 return -EINVAL;
248 if (changed) {
249 params->cmask |= 1 << var;
250 params->rmask |= 1 << var;
251 }
252 return changed;
253}
254
255/**
256 * snd_pcm_hw_param_min
257 * @pcm: PCM instance
258 * @params: the hw_params instance
259 * @var: parameter to retrieve
260 * @val: minimal value
261 * @dir: pointer to the direction (-1,0,1) or NULL
262 *
263 * Inside configuration space defined by PARAMS remove from PAR all
264 * values < VAL. Reduce configuration space accordingly.
265 * Return new minimum or -EINVAL if the configuration space is empty
266 */
267static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
268 struct snd_pcm_hw_params *params,
269 snd_pcm_hw_param_t var, unsigned int val,
270 int *dir)
271{
272 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
273 if (changed < 0)
274 return changed;
275 if (params->rmask) {
276 int err = snd_pcm_hw_refine(pcm, params);
277 if (err < 0)
278 return err;
279 }
280 return snd_pcm_hw_param_value_min(params, var, dir);
281}
282
283static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
284 snd_pcm_hw_param_t var, unsigned int val,
285 int dir)
286{
287 int changed;
288 int open = 0;
289 if (dir) {
290 if (dir < 0) {
291 open = 1;
292 } else if (dir > 0) {
293 open = 1;
294 val++;
295 }
296 }
297 if (hw_is_mask(var)) {
298 if (val == 0 && open) {
299 snd_mask_none(hw_param_mask(params, var));
300 changed = -EINVAL;
301 } else
302 changed = snd_mask_refine_max(hw_param_mask(params, var),
303 val - !!open);
304 } else if (hw_is_interval(var))
305 changed = snd_interval_refine_max(hw_param_interval(params, var),
306 val, open);
307 else
308 return -EINVAL;
309 if (changed) {
310 params->cmask |= 1 << var;
311 params->rmask |= 1 << var;
312 }
313 return changed;
314}
315
316/**
317 * snd_pcm_hw_param_max
318 * @pcm: PCM instance
319 * @params: the hw_params instance
320 * @var: parameter to retrieve
321 * @val: maximal value
322 * @dir: pointer to the direction (-1,0,1) or NULL
323 *
324 * Inside configuration space defined by PARAMS remove from PAR all
325 * values >= VAL + 1. Reduce configuration space accordingly.
326 * Return new maximum or -EINVAL if the configuration space is empty
327 */
328static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
329 struct snd_pcm_hw_params *params,
330 snd_pcm_hw_param_t var, unsigned int val,
331 int *dir)
332{
333 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
334 if (changed < 0)
335 return changed;
336 if (params->rmask) {
337 int err = snd_pcm_hw_refine(pcm, params);
338 if (err < 0)
339 return err;
340 }
341 return snd_pcm_hw_param_value_max(params, var, dir);
342}
343
344static int boundary_sub(int a, int adir,
345 int b, int bdir,
346 int *c, int *cdir)
347{
348 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
349 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
350 *c = a - b;
351 *cdir = adir - bdir;
352 if (*cdir == -2) {
353 (*c)--;
354 } else if (*cdir == 2) {
355 (*c)++;
356 }
357 return 0;
358}
359
360static int boundary_lt(unsigned int a, int adir,
361 unsigned int b, int bdir)
362{
363 if (adir < 0) {
364 a--;
365 adir = 1;
366 } else if (adir > 0)
367 adir = 1;
368 if (bdir < 0) {
369 b--;
370 bdir = 1;
371 } else if (bdir > 0)
372 bdir = 1;
373 return a < b || (a == b && adir < bdir);
374}
375
376/* Return 1 if min is nearer to best than max */
377static int boundary_nearer(int min, int mindir,
378 int best, int bestdir,
379 int max, int maxdir)
380{
381 int dmin, dmindir;
382 int dmax, dmaxdir;
383 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
384 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
385 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
386}
387
388/**
389 * snd_pcm_hw_param_near
390 * @pcm: PCM instance
391 * @params: the hw_params instance
392 * @var: parameter to retrieve
393 * @best: value to set
394 * @dir: pointer to the direction (-1,0,1) or NULL
395 *
396 * Inside configuration space defined by PARAMS set PAR to the available value
397 * nearest to VAL. Reduce configuration space accordingly.
398 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
399 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
400 * Return the value found.
401 */
402static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
403 struct snd_pcm_hw_params *params,
404 snd_pcm_hw_param_t var, unsigned int best,
405 int *dir)
406{
407 struct snd_pcm_hw_params *save = NULL;
408 int v;
409 unsigned int saved_min;
410 int last = 0;
411 int min, max;
412 int mindir, maxdir;
413 int valdir = dir ? *dir : 0;
414 /* FIXME */
415 if (best > INT_MAX)
416 best = INT_MAX;
417 min = max = best;
418 mindir = maxdir = valdir;
419 if (maxdir > 0)
420 maxdir = 0;
421 else if (maxdir == 0)
422 maxdir = -1;
423 else {
424 maxdir = 1;
425 max--;
426 }
427 save = kmalloc(sizeof(*save), GFP_KERNEL);
428 if (save == NULL)
429 return -ENOMEM;
430 *save = *params;
431 saved_min = min;
432 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
433 if (min >= 0) {
434 struct snd_pcm_hw_params *params1;
435 if (max < 0)
436 goto _end;
437 if ((unsigned int)min == saved_min && mindir == valdir)
438 goto _end;
439 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
440 if (params1 == NULL) {
441 kfree(save);
442 return -ENOMEM;
443 }
444 *params1 = *save;
445 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
446 if (max < 0) {
447 kfree(params1);
448 goto _end;
449 }
450 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
451 *params = *params1;
452 last = 1;
453 }
454 kfree(params1);
455 } else {
456 *params = *save;
457 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
3daa7ea6
JJ		 458 if (max < 0) {
459 kfree(save);
7eaa943c 460 return max;
3daa7ea6 461 }
e88e8ae6
TI		 462 last = 1;
463 }
464 _end:
465 kfree(save);
466 if (last)
467 v = snd_pcm_hw_param_last(pcm, params, var, dir);
468 else
469 v = snd_pcm_hw_param_first(pcm, params, var, dir);
7eaa943c 470 snd_BUG_ON(v < 0);
e88e8ae6
TI		 471 return v;
472}
473
474static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
475 snd_pcm_hw_param_t var, unsigned int val,
476 int dir)
477{
478 int changed;
479 if (hw_is_mask(var)) {
480 struct snd_mask *m = hw_param_mask(params, var);
481 if (val == 0 && dir < 0) {
482 changed = -EINVAL;
483 snd_mask_none(m);
484 } else {
485 if (dir > 0)
486 val++;
487 else if (dir < 0)
488 val--;
489 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
490 }
491 } else if (hw_is_interval(var)) {
492 struct snd_interval *i = hw_param_interval(params, var);
493 if (val == 0 && dir < 0) {
494 changed = -EINVAL;
495 snd_interval_none(i);
496 } else if (dir == 0)
497 changed = snd_interval_refine_set(i, val);
498 else {
499 struct snd_interval t;
500 t.openmin = 1;
501 t.openmax = 1;
502 t.empty = 0;
503 t.integer = 0;
504 if (dir < 0) {
505 t.min = val - 1;
506 t.max = val;
507 } else {
508 t.min = val;
509 t.max = val+1;
510 }
511 changed = snd_interval_refine(i, &t);
512 }
513 } else
514 return -EINVAL;
515 if (changed) {
516 params->cmask |= 1 << var;
517 params->rmask |= 1 << var;
518 }
519 return changed;
520}
521
522/**
523 * snd_pcm_hw_param_set
524 * @pcm: PCM instance
525 * @params: the hw_params instance
526 * @var: parameter to retrieve
527 * @val: value to set
528 * @dir: pointer to the direction (-1,0,1) or NULL
529 *
530 * Inside configuration space defined by PARAMS remove from PAR all
531 * values != VAL. Reduce configuration space accordingly.
532 * Return VAL or -EINVAL if the configuration space is empty
533 */
534static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
535 struct snd_pcm_hw_params *params,
536 snd_pcm_hw_param_t var, unsigned int val,
537 int dir)
538{
539 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
540 if (changed < 0)
541 return changed;
542 if (params->rmask) {
543 int err = snd_pcm_hw_refine(pcm, params);
544 if (err < 0)
545 return err;
546 }
547 return snd_pcm_hw_param_value(params, var, NULL);
548}
549
550static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
551 snd_pcm_hw_param_t var)
552{
553 int changed;
554 changed = snd_interval_setinteger(hw_param_interval(params, var));
555 if (changed) {
556 params->cmask |= 1 << var;
557 params->rmask |= 1 << var;
558 }
559 return changed;
560}
561
562/*
563 * plugin
564 */
565
21a3479a 566#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 567static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 568{
6ac77bc1
TI		 569 struct snd_pcm_runtime *runtime = substream->runtime;
570 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 571
572 plugin = runtime->oss.plugin_first;
573 while (plugin) {
574 next = plugin->next;
575 snd_pcm_plugin_free(plugin);
576 plugin = next;
577 }
578 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
579 return 0;
580}
581
6ac77bc1 582static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 583{
6ac77bc1 584 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 585 plugin->next = runtime->oss.plugin_first;
586 plugin->prev = NULL;
587 if (runtime->oss.plugin_first) {
588 runtime->oss.plugin_first->prev = plugin;
589 runtime->oss.plugin_first = plugin;
590 } else {
591 runtime->oss.plugin_last =
592 runtime->oss.plugin_first = plugin;
593 }
594 return 0;
595}
596
6ac77bc1 597int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 598{
6ac77bc1 599 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 600 plugin->next = NULL;
601 plugin->prev = runtime->oss.plugin_last;
602 if (runtime->oss.plugin_last) {
603 runtime->oss.plugin_last->next = plugin;
604 runtime->oss.plugin_last = plugin;
605 } else {
606 runtime->oss.plugin_last =
607 runtime->oss.plugin_first = plugin;
608 }
609 return 0;
610}
21a3479a 611#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 612
6ac77bc1 613static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 614{
6ac77bc1 615 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 616 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 617 long bytes = frames_to_bytes(runtime, frames);
1da177e4 618 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 619 return bytes;
cdc5c53f
TI		 620#if BITS_PER_LONG >= 64
621 return runtime->oss.buffer_bytes * bytes / buffer_size;
622#else
623 {
624 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
3f7440a6 625 return div_u64(bsize, buffer_size);
cdc5c53f
TI		 626 }
627#endif
1da177e4
LT		 628}
629
6ac77bc1 630static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 631{
6ac77bc1 632 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 633 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 634 if (buffer_size == runtime->oss.buffer_bytes)
635 return bytes_to_frames(runtime, bytes);
636 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
637}
638
f240406b
JK		 639static inline
640snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
641{
e7636925 642 return runtime->hw_ptr_interrupt;
f240406b
JK		 643}
644
24038a25
TI		 645/* define extended formats in the recent OSS versions (if any) */
646/* linear formats */
647#define AFMT_S32_LE 0x00001000
648#define AFMT_S32_BE 0x00002000
649#define AFMT_S24_LE 0x00008000
650#define AFMT_S24_BE 0x00010000
651#define AFMT_S24_PACKED 0x00040000
652
653/* other supported formats */
654#define AFMT_FLOAT 0x00004000
655#define AFMT_SPDIF_RAW 0x00020000
656
657/* unsupported formats */
658#define AFMT_AC3 0x00000400
659#define AFMT_VORBIS 0x00000800
660
fea952e5 661static snd_pcm_format_t snd_pcm_oss_format_from(int format)
1da177e4
LT		 662{
663 switch (format) {
664 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
665 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
666 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
667 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
668 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
669 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
670 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
671 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
672 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
673 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
24038a25
TI		 674 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
675 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
676 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
677 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
678 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
679 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
680 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
1da177e4
LT		 681 default: return SNDRV_PCM_FORMAT_U8;
682 }
683}
684
fea952e5 685static int snd_pcm_oss_format_to(snd_pcm_format_t format)
1da177e4
LT		 686{
687 switch (format) {
688 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
689 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
690 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
691 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
692 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
693 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
694 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
695 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
696 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
697 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
24038a25
TI		 698 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
699 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
700 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
701 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
702 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
703 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
704 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
1da177e4
LT		 705 default: return -EINVAL;
706 }
707}
708
6ac77bc1
TI		 709static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
710 struct snd_pcm_hw_params *oss_params,
711 struct snd_pcm_hw_params *slave_params)
1da177e4
LT		 712{
713 size_t s;
714 size_t oss_buffer_size, oss_period_size, oss_periods;
715 size_t min_period_size, max_period_size;
6ac77bc1 716 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 717 size_t oss_frame_size;
718
719 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
720 params_channels(oss_params) / 8;
721
722 oss_buffer_size = snd_pcm_plug_client_size(substream,
723 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
f6dbe1be 724 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
9c323fcb 725 if (atomic_read(&substream->mmap_count)) {
1da177e4
LT		 726 if (oss_buffer_size > runtime->oss.mmap_bytes)
727 oss_buffer_size = runtime->oss.mmap_bytes;
728 }
729
060d77b9
TI		 730 if (substream->oss.setup.period_size > 16)
731 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 732 else if (runtime->oss.fragshift) {
733 oss_period_size = 1 << runtime->oss.fragshift;
734 if (oss_period_size > oss_buffer_size / 2)
735 oss_period_size = oss_buffer_size / 2;
736 } else {
737 int sd;
738 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
739
740 oss_period_size = oss_buffer_size;
741 do {
742 oss_period_size /= 2;
743 } while (oss_period_size > bytes_per_sec);
744 if (runtime->oss.subdivision == 0) {
745 sd = 4;
746 if (oss_period_size / sd > 4096)
747 sd *= 2;
748 if (oss_period_size / sd < 4096)
749 sd = 1;
750 } else
751 sd = runtime->oss.subdivision;
752 oss_period_size /= sd;
753 if (oss_period_size < 16)
754 oss_period_size = 16;
755 }
756
757 min_period_size = snd_pcm_plug_client_size(substream,
758 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
759 min_period_size *= oss_frame_size;
f6dbe1be 760 min_period_size = roundup_pow_of_two(min_period_size);
1da177e4
LT		 761 if (oss_period_size < min_period_size)
762 oss_period_size = min_period_size;
763
764 max_period_size = snd_pcm_plug_client_size(substream,
765 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
766 max_period_size *= oss_frame_size;
f6dbe1be 767 max_period_size = rounddown_pow_of_two(max_period_size);
1da177e4
LT		 768 if (oss_period_size > max_period_size)
769 oss_period_size = max_period_size;
770
771 oss_periods = oss_buffer_size / oss_period_size;
772
060d77b9
TI		 773 if (substream->oss.setup.periods > 1)
774 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 775
776 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
777 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
778 s = runtime->oss.maxfrags;
779 if (oss_periods > s)
780 oss_periods = s;
781
782 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
783 if (s < 2)
784 s = 2;
785 if (oss_periods < s)
786 oss_periods = s;
787
788 while (oss_period_size * oss_periods > oss_buffer_size)
789 oss_period_size /= 2;
790
7eaa943c
TI		 791 if (oss_period_size < 16)
792 return -EINVAL;
1da177e4
LT		 793 runtime->oss.period_bytes = oss_period_size;
794 runtime->oss.period_frames = 1;
795 runtime->oss.periods = oss_periods;
796 return 0;
797}
798
6ac77bc1
TI		 799static int choose_rate(struct snd_pcm_substream *substream,
800 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 801{
6ac77bc1
TI		 802 struct snd_interval *it;
803 struct snd_pcm_hw_params *save;
1da177e4
LT		 804 unsigned int rate, prev;
805
806 save = kmalloc(sizeof(*save), GFP_KERNEL);
807 if (save == NULL)
808 return -ENOMEM;
809 *save = *params;
810 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
811
812 /* try multiples of the best rate */
813 rate = best_rate;
814 for (;;) {
815 if (it->max < rate || (it->max == rate && it->openmax))
816 break;
817 if (it->min < rate || (it->min == rate && !it->openmin)) {
818 int ret;
819 ret = snd_pcm_hw_param_set(substream, params,
820 SNDRV_PCM_HW_PARAM_RATE,
821 rate, 0);
822 if (ret == (int)rate) {
823 kfree(save);
824 return rate;
825 }
826 *params = *save;
827 }
828 prev = rate;
829 rate += best_rate;
830 if (rate <= prev)
831 break;
832 }
833
834 /* not found, use the nearest rate */
835 kfree(save);
836 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
837}
838
b2483716
TI		 839static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
840 bool trylock)
1da177e4 841{
6ac77bc1
TI		 842 struct snd_pcm_runtime *runtime = substream->runtime;
843 struct snd_pcm_hw_params *params, *sparams;
844 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 845 ssize_t oss_buffer_size, oss_period_size;
846 size_t oss_frame_size;
847 int err;
848 int direct;
fea952e5
CL		 849 snd_pcm_format_t format, sformat;
850 int n;
6ac77bc1
TI		 851 struct snd_mask sformat_mask;
852 struct snd_mask mask;
1da177e4 853
b2483716
TI		 854 if (trylock) {
855 if (!(mutex_trylock(&runtime->oss.params_lock)))
856 return -EAGAIN;
857 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
e3a5d59a 858 return -EINTR;
46325371 859 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
1da177e4
LT		 860 params = kmalloc(sizeof(*params), GFP_KERNEL);
861 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
862 if (!sw_params || !params || !sparams) {
1da177e4
LT		 863 err = -ENOMEM;
864 goto failure;
865 }
866
9c323fcb 867 if (atomic_read(&substream->mmap_count))
1da177e4 868 direct = 1;
060d77b9
TI		 869 else
870 direct = substream->oss.setup.direct;
1da177e4
LT		 871
872 _snd_pcm_hw_params_any(sparams);
873 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
874 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
875 snd_mask_none(&mask);
9c323fcb 876 if (atomic_read(&substream->mmap_count))
fea952e5 877 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 878 else {
fea952e5 879 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 880 if (!direct)
fea952e5 881 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
1da177e4
LT		 882 }
883 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
884 if (err < 0) {
61efcee8 885 pcm_dbg(substream->pcm, "No usable accesses\n");
1da177e4
LT		 886 err = -EINVAL;
887 goto failure;
888 }
889 choose_rate(substream, sparams, runtime->oss.rate);
890 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
891
892 format = snd_pcm_oss_format_from(runtime->oss.format);
893
894 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
895 if (direct)
896 sformat = format;
897 else
898 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
899
fea952e5
CL		 900 if ((__force int)sformat < 0 ||
901 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
902 for (sformat = (__force snd_pcm_format_t)0;
903 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
904 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
905 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
1da177e4
LT		 906 snd_pcm_oss_format_to(sformat) >= 0)
907 break;
908 }
fea952e5 909 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
61efcee8 910 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
1da177e4
LT		 911 err = -EINVAL;
912 goto failure;
913 }
914 }
fea952e5 915 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
7eaa943c
TI		 916 if (err < 0)
917 goto failure;
1da177e4
LT		 918
919 if (direct) {
920 memcpy(params, sparams, sizeof(*params));
921 } else {
922 _snd_pcm_hw_params_any(params);
923 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
fea952e5 924 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
1da177e4 925 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
fea952e5 926 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
1da177e4
LT		 927 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
928 runtime->oss.channels, 0);
929 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
930 runtime->oss.rate, 0);
931 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
932 params_access(params), params_format(params),
933 params_channels(params), params_rate(params));
934 }
935 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
936 params_access(sparams), params_format(sparams),
937 params_channels(sparams), params_rate(sparams));
938
939 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
940 params_channels(params) / 8;
941
21a3479a 942#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 943 snd_pcm_oss_plugin_clear(substream);
944 if (!direct) {
945 /* add necessary plugins */
946 snd_pcm_oss_plugin_clear(substream);
947 if ((err = snd_pcm_plug_format_plugins(substream,
948 params,
949 sparams)) < 0) {
61efcee8
TI		 950 pcm_dbg(substream->pcm,
951 "snd_pcm_plug_format_plugins failed: %i\n", err);
1da177e4
LT		 952 snd_pcm_oss_plugin_clear(substream);
953 goto failure;
954 }
955 if (runtime->oss.plugin_first) {
6ac77bc1 956 struct snd_pcm_plugin *plugin;
1da177e4 957 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
61efcee8
TI		 958 pcm_dbg(substream->pcm,
959 "snd_pcm_plugin_build_io failed: %i\n", err);
1da177e4
LT		 960 snd_pcm_oss_plugin_clear(substream);
961 goto failure;
962 }
963 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
964 err = snd_pcm_plugin_append(plugin);
965 } else {
966 err = snd_pcm_plugin_insert(plugin);
967 }
968 if (err < 0) {
969 snd_pcm_oss_plugin_clear(substream);
970 goto failure;
971 }
972 }
973 }
21a3479a 974#endif
1da177e4
LT		 975
976 err = snd_pcm_oss_period_size(substream, params, sparams);
977 if (err < 0)
978 goto failure;
979
980 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
981 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
7eaa943c
TI		 982 if (err < 0)
983 goto failure;
1da177e4
LT		 984
985 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
986 runtime->oss.periods, NULL);
7eaa943c
TI		 987 if (err < 0)
988 goto failure;
1da177e4
LT		 989
990 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
991
992 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
61efcee8 993 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
1da177e4
LT		 994 goto failure;
995 }
996
1da177e4
LT		 997 if (runtime->oss.trigger) {
998 sw_params->start_threshold = 1;
999 } else {
1000 sw_params->start_threshold = runtime->boundary;
1001 }
9c323fcb
TI		 1002 if (atomic_read(&substream->mmap_count) ||
1003 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 1004 sw_params->stop_threshold = runtime->boundary;
1005 else
1006 sw_params->stop_threshold = runtime->buffer_size;
1007 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1008 sw_params->period_step = 1;
004e6538
TI		 1009 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1010 1 : runtime->period_size;
9c323fcb 1011 if (atomic_read(&substream->mmap_count) ||
060d77b9 1012 substream->oss.setup.nosilence) {
1da177e4
LT		 1013 sw_params->silence_threshold = 0;
1014 sw_params->silence_size = 0;
1015 } else {
1016 snd_pcm_uframes_t frames;
1017 frames = runtime->period_size + 16;
1018 if (frames > runtime->buffer_size)
1019 frames = runtime->buffer_size;
1020 sw_params->silence_threshold = frames;
1021 sw_params->silence_size = frames;
1022 }
1023
1024 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
61efcee8 1025 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1da177e4
LT		 1026 goto failure;
1027 }
1028
1029 runtime->oss.periods = params_periods(sparams);
1030 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
7eaa943c
TI		 1031 if (oss_period_size < 0) {
1032 err = -EINVAL;
1033 goto failure;
1034 }
21a3479a 1035#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1036 if (runtime->oss.plugin_first) {
1037 err = snd_pcm_plug_alloc(substream, oss_period_size);
1038 if (err < 0)
1039 goto failure;
1040 }
21a3479a 1041#endif
1da177e4
LT		 1042 oss_period_size *= oss_frame_size;
1043
1044 oss_buffer_size = oss_period_size * runtime->oss.periods;
7eaa943c
TI		 1045 if (oss_buffer_size < 0) {
1046 err = -EINVAL;
1047 goto failure;
1048 }
1da177e4
LT		 1049
1050 runtime->oss.period_bytes = oss_period_size;
1051 runtime->oss.buffer_bytes = oss_buffer_size;
1052
1053 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1054 runtime->oss.period_bytes,
1055 runtime->oss.buffer_bytes);
1056 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1057 params_period_size(sparams),
1058 params_buffer_size(sparams));
1059
1060 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1061 runtime->oss.channels = params_channels(params);
1062 runtime->oss.rate = params_rate(params);
1063
1da177e4
LT		 1064 vfree(runtime->oss.buffer);
1065 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
cbbb0570
RK		 1066 if (!runtime->oss.buffer) {
1067 err = -ENOMEM;
1068 goto failure;
1069 }
1070
1071 runtime->oss.params = 0;
1072 runtime->oss.prepare = 1;
1da177e4
LT		 1073 runtime->oss.buffer_used = 0;
1074 if (runtime->dma_area)
1075 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1076
1077 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1078
1079 err = 0;
1080failure:
1081 kfree(sw_params);
1082 kfree(params);
1083 kfree(sparams);
e3a5d59a 1084 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1085 return err;
1086}
1087
6ac77bc1 1088static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1089{
1090 int idx, err;
6ac77bc1 1091 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 1092
1093 for (idx = 0; idx < 2; idx++) {
1094 substream = pcm_oss_file->streams[idx];
1095 if (substream == NULL)
1096 continue;
1097 if (asubstream == NULL)
1098 asubstream = substream;
1099 if (substream->runtime->oss.params) {
b2483716 1100 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1101 if (err < 0)
1102 return err;
1103 }
1104 }
7eaa943c
TI		 1105 if (!asubstream)
1106 return -EIO;
1da177e4
LT		 1107 if (r_substream)
1108 *r_substream = asubstream;
1109 return 0;
1110}
1111
6ac77bc1 1112static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1113{
1114 int err;
6ac77bc1 1115 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1116
1117 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1118 if (err < 0) {
61efcee8
TI		 1119 pcm_dbg(substream->pcm,
1120 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1da177e4
LT		 1121 return err;
1122 }
1123 runtime->oss.prepare = 0;
f240406b 1124 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1125 runtime->oss.period_ptr = 0;
1126 runtime->oss.buffer_used = 0;
1127
1128 return 0;
1129}
1130
6ac77bc1 1131static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1132{
6ac77bc1 1133 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1134 int err;
1135
1136 if (substream == NULL)
1137 return 0;
1138 runtime = substream->runtime;
1139 if (runtime->oss.params) {
b2483716 1140 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1141 if (err < 0)
1142 return err;
1143 }
1144 if (runtime->oss.prepare) {
1145 err = snd_pcm_oss_prepare(substream);
1146 if (err < 0)
1147 return err;
1148 }
1149 return 0;
1150}
1151
6ac77bc1 1152static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1153{
6ac77bc1 1154 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1155 snd_pcm_uframes_t frames;
1156 int err = 0;
1157
1158 while (1) {
1159 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1160 if (err < 0)
1161 break;
1162 runtime = substream->runtime;
1163 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1164 break;
1165 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1166 /* until avail(delay) <= buffer_size */
1167 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1168 frames /= runtime->period_size;
1169 frames *= runtime->period_size;
1170 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1171 if (err < 0)
1172 break;
1173 }
1174 return err;
1175}
1176
6ac77bc1 1177snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1178{
6ac77bc1 1179 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1180 int ret;
1181 while (1) {
1182 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1183 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1184#ifdef OSS_DEBUG
61efcee8
TI		 1185 pcm_dbg(substream->pcm,
1186 "pcm_oss: write: recovering from %s\n",
1187 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1188 "XRUN" : "SUSPEND");
1da177e4
LT		 1189#endif
1190 ret = snd_pcm_oss_prepare(substream);
1191 if (ret < 0)
1192 break;
1193 }
1194 if (in_kernel) {
1195 mm_segment_t fs;
1196 fs = snd_enter_user();
fea952e5 1197 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1198 snd_leave_user(fs);
1199 } else {
fea952e5 1200 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1201 }
1202 if (ret != -EPIPE && ret != -ESTRPIPE)
1203 break;
1204 /* test, if we can't store new data, because the stream */
1205 /* has not been started */
1206 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1207 return -EAGAIN;
1208 }
1209 return ret;
1210}
1211
6ac77bc1 1212snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1213{
6ac77bc1 1214 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1215 snd_pcm_sframes_t delay;
1216 int ret;
1217 while (1) {
1218 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1219 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1220#ifdef OSS_DEBUG
61efcee8
TI		 1221 pcm_dbg(substream->pcm,
1222 "pcm_oss: read: recovering from %s\n",
1223 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1224 "XRUN" : "SUSPEND");
1da177e4
LT		 1225#endif
1226 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1227 if (ret < 0)
1228 break;
1229 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1230 ret = snd_pcm_oss_prepare(substream);
1231 if (ret < 0)
1232 break;
1233 }
1234 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1235 if (ret < 0)
1236 break;
1237 if (in_kernel) {
1238 mm_segment_t fs;
1239 fs = snd_enter_user();
fea952e5 1240 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1241 snd_leave_user(fs);
1242 } else {
fea952e5 1243 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1244 }
1245 if (ret == -EPIPE) {
1246 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1247 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1248 if (ret < 0)
1249 break;
1250 }
1251 continue;
1252 }
1253 if (ret != -ESTRPIPE)
1254 break;
1255 }
1256 return ret;
1257}
1258
6ac77bc1 1259snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1260{
6ac77bc1 1261 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1262 int ret;
1263 while (1) {
1264 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1265 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1266#ifdef OSS_DEBUG
61efcee8
TI		 1267 pcm_dbg(substream->pcm,
1268 "pcm_oss: writev: recovering from %s\n",
1269 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1270 "XRUN" : "SUSPEND");
1da177e4
LT		 1271#endif
1272 ret = snd_pcm_oss_prepare(substream);
1273 if (ret < 0)
1274 break;
1275 }
1276 if (in_kernel) {
1277 mm_segment_t fs;
1278 fs = snd_enter_user();
1279 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1280 snd_leave_user(fs);
1281 } else {
1282 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1283 }
1284 if (ret != -EPIPE && ret != -ESTRPIPE)
1285 break;
1286
1287 /* test, if we can't store new data, because the stream */
1288 /* has not been started */
1289 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1290 return -EAGAIN;
1291 }
1292 return ret;
1293}
1294
6ac77bc1 1295snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1296{
6ac77bc1 1297 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1298 int ret;
1299 while (1) {
1300 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1301 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1302#ifdef OSS_DEBUG
61efcee8
TI		 1303 pcm_dbg(substream->pcm,
1304 "pcm_oss: readv: recovering from %s\n",
1305 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1306 "XRUN" : "SUSPEND");
1da177e4
LT		 1307#endif
1308 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1309 if (ret < 0)
1310 break;
1311 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1312 ret = snd_pcm_oss_prepare(substream);
1313 if (ret < 0)
1314 break;
1315 }
1316 if (in_kernel) {
1317 mm_segment_t fs;
1318 fs = snd_enter_user();
1319 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1320 snd_leave_user(fs);
1321 } else {
1322 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1323 }
1324 if (ret != -EPIPE && ret != -ESTRPIPE)
1325 break;
1326 }
1327 return ret;
1328}
1329
6ac77bc1 1330static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1331{
6ac77bc1 1332 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1333 snd_pcm_sframes_t frames, frames1;
21a3479a 1334#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1335 if (runtime->oss.plugin_first) {
6ac77bc1 1336 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1337 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1338 if (!in_kernel) {
fea952e5 1339 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1da177e4
LT		 1340 return -EFAULT;
1341 buf = runtime->oss.buffer;
1342 }
1343 frames = bytes / oss_frame_bytes;
1344 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1345 if (frames1 < 0)
1346 return frames1;
1347 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1348 if (frames1 <= 0)
1349 return frames1;
1350 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 1351 } else
1352#endif
1353 {
1da177e4
LT		 1354 frames = bytes_to_frames(runtime, bytes);
1355 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1356 if (frames1 <= 0)
1357 return frames1;
1358 bytes = frames_to_bytes(runtime, frames1);
1359 }
1360 return bytes;
1361}
1362
6ac77bc1 1363static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1364{
1365 size_t xfer = 0;
1366 ssize_t tmp;
6ac77bc1 1367 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1368
9c323fcb 1369 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1370 return -ENXIO;
1371
1372 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1373 return tmp;
e3a5d59a 1374 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1375 while (bytes > 0) {
1376 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1377 tmp = bytes;
1378 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1379 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1380 if (tmp > 0) {
e3a5d59a
TI		 1381 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1382 tmp = -EFAULT;
1383 goto err;
1384 }
1da177e4
LT		 1385 }
1386 runtime->oss.buffer_used += tmp;
1387 buf += tmp;
1388 bytes -= tmp;
1389 xfer += tmp;
060d77b9 1390 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 1391 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1392 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1393 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1394 if (tmp <= 0)
e3a5d59a 1395 goto err;
1da177e4
LT		 1396 runtime->oss.bytes += tmp;
1397 runtime->oss.period_ptr += tmp;
1398 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1399 if (runtime->oss.period_ptr == 0 ||
1400 runtime->oss.period_ptr == runtime->oss.buffer_used)
1401 runtime->oss.buffer_used = 0;
e3a5d59a
TI		 1402 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1403 tmp = -EAGAIN;
1404 goto err;
1405 }
1da177e4
LT		 1406 }
1407 } else {
4d23359b
CL		 1408 tmp = snd_pcm_oss_write2(substream,
1409 (const char __force *)buf,
1410 runtime->oss.period_bytes, 0);
1da177e4 1411 if (tmp <= 0)
e3a5d59a 1412 goto err;
1da177e4
LT		 1413 runtime->oss.bytes += tmp;
1414 buf += tmp;
1415 bytes -= tmp;
1416 xfer += tmp;
0df63e44 1417 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4
LT		 1418 tmp != runtime->oss.period_bytes)
1419 break;
1420 }
1421 }
e3a5d59a 1422 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1423 return xfer;
e3a5d59a
TI		 1424
1425 err:
1426 mutex_unlock(&runtime->oss.params_lock);
1427 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1428}
1429
6ac77bc1 1430static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1431{
6ac77bc1 1432 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1433 snd_pcm_sframes_t frames, frames1;
21a3479a 1434#ifdef CONFIG_SND_PCM_OSS_PLUGINS
fea952e5 1435 char __user *final_dst = (char __force __user *)buf;
1da177e4 1436 if (runtime->oss.plugin_first) {
6ac77bc1 1437 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1438 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1439 if (!in_kernel)
1440 buf = runtime->oss.buffer;
1441 frames = bytes / oss_frame_bytes;
1442 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1443 if (frames1 < 0)
1444 return frames1;
1445 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1446 if (frames1 <= 0)
1447 return frames1;
1448 bytes = frames1 * oss_frame_bytes;
1449 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1450 return -EFAULT;
21a3479a
JK		 1451 } else
1452#endif
1453 {
1da177e4
LT		 1454 frames = bytes_to_frames(runtime, bytes);
1455 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1456 if (frames1 <= 0)
1457 return frames1;
1458 bytes = frames_to_bytes(runtime, frames1);
1459 }
1460 return bytes;
1461}
1462
6ac77bc1 1463static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1464{
1465 size_t xfer = 0;
1466 ssize_t tmp;
6ac77bc1 1467 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1468
9c323fcb 1469 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1470 return -ENXIO;
1471
1472 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1473 return tmp;
e3a5d59a 1474 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1475 while (bytes > 0) {
1476 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1477 if (runtime->oss.buffer_used == 0) {
1478 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1479 if (tmp <= 0)
e3a5d59a 1480 goto err;
1da177e4
LT		 1481 runtime->oss.bytes += tmp;
1482 runtime->oss.period_ptr = tmp;
1483 runtime->oss.buffer_used = tmp;
1484 }
1485 tmp = bytes;
1486 if ((size_t) tmp > runtime->oss.buffer_used)
1487 tmp = runtime->oss.buffer_used;
e3a5d59a
TI		 1488 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1489 tmp = -EFAULT;
1490 goto err;
1491 }
1da177e4
LT		 1492 buf += tmp;
1493 bytes -= tmp;
1494 xfer += tmp;
1495 runtime->oss.buffer_used -= tmp;
1496 } else {
4d23359b
CL		 1497 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1498 runtime->oss.period_bytes, 0);
1da177e4 1499 if (tmp <= 0)
e3a5d59a 1500 goto err;
1da177e4
LT		 1501 runtime->oss.bytes += tmp;
1502 buf += tmp;
1503 bytes -= tmp;
1504 xfer += tmp;
1505 }
1506 }
e3a5d59a 1507 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1508 return xfer;
e3a5d59a
TI		 1509
1510 err:
1511 mutex_unlock(&runtime->oss.params_lock);
1512 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1513}
1514
6ac77bc1 1515static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1516{
6ac77bc1 1517 struct snd_pcm_substream *substream;
60686aa0
TI		 1518 struct snd_pcm_runtime *runtime;
1519 int i;
1da177e4 1520
60686aa0
TI		 1521 for (i = 0; i < 2; i++) {
1522 substream = pcm_oss_file->streams[i];
1523 if (!substream)
1524 continue;
1525 runtime = substream->runtime;
bf1bbb5a 1526 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
60686aa0
TI		 1527 runtime->oss.prepare = 1;
1528 runtime->oss.buffer_used = 0;
1529 runtime->oss.prev_hw_ptr_period = 0;
1530 runtime->oss.period_ptr = 0;
1da177e4
LT		 1531 }
1532 return 0;
1533}
1534
6ac77bc1 1535static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1536{
6ac77bc1 1537 struct snd_pcm_substream *substream;
1da177e4
LT		 1538 int err;
1539
1540 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1541 if (substream != NULL) {
1542 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1543 return err;
bf1bbb5a 1544 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 1545 }
1546 /* note: all errors from the start action are ignored */
1547 /* OSS apps do not know, how to handle them */
1548 return 0;
1549}
1550
6ac77bc1 1551static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1552{
6ac77bc1 1553 struct snd_pcm_runtime *runtime;
1da177e4 1554 ssize_t result = 0;
fea952e5 1555 snd_pcm_state_t state;
1da177e4
LT		 1556 long res;
1557 wait_queue_t wait;
1558
1559 runtime = substream->runtime;
1560 init_waitqueue_entry(&wait, current);
1561 add_wait_queue(&runtime->sleep, &wait);
1562#ifdef OSS_DEBUG
61efcee8 1563 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1da177e4
LT		 1564#endif
1565 while (1) {
1566 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1567 if (result > 0) {
1568 runtime->oss.buffer_used = 0;
1569 result = 0;
1570 break;
1571 }
1572 if (result != 0 && result != -EAGAIN)
1573 break;
1574 result = 0;
1575 set_current_state(TASK_INTERRUPTIBLE);
1576 snd_pcm_stream_lock_irq(substream);
fea952e5 1577 state = runtime->status->state;
1da177e4 1578 snd_pcm_stream_unlock_irq(substream);
fea952e5 1579 if (state != SNDRV_PCM_STATE_RUNNING) {
1da177e4
LT		 1580 set_current_state(TASK_RUNNING);
1581 break;
1582 }
1583 res = schedule_timeout(10 * HZ);
1584 if (signal_pending(current)) {
1585 result = -ERESTARTSYS;
1586 break;
1587 }
1588 if (res == 0) {
61efcee8
TI		 1589 pcm_err(substream->pcm,
1590 "OSS sync error - DMA timeout\n");
1da177e4
LT		 1591 result = -EIO;
1592 break;
1593 }
1594 }
1595 remove_wait_queue(&runtime->sleep, &wait);
1596 return result;
1597}
1598
6ac77bc1 1599static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1600{
1601 int err = 0;
1602 unsigned int saved_f_flags;
6ac77bc1
TI		 1603 struct snd_pcm_substream *substream;
1604 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1605 snd_pcm_format_t format;
1606 unsigned long width;
1607 size_t size;
1608
1609 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1610 if (substream != NULL) {
1611 runtime = substream->runtime;
9c323fcb 1612 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1613 goto __direct;
1614 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1615 return err;
1616 format = snd_pcm_oss_format_from(runtime->oss.format);
1617 width = snd_pcm_format_physical_width(format);
e3a5d59a 1618 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1619 if (runtime->oss.buffer_used > 0) {
1620#ifdef OSS_DEBUG
61efcee8 1621 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1da177e4
LT		 1622#endif
1623 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1624 snd_pcm_format_set_silence(format,
1625 runtime->oss.buffer + runtime->oss.buffer_used,
1626 size);
1627 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
e3a5d59a
TI		 1628 if (err < 0) {
1629 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1630 return err;
e3a5d59a 1631 }
1da177e4
LT		 1632 } else if (runtime->oss.period_ptr > 0) {
1633#ifdef OSS_DEBUG
61efcee8 1634 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1da177e4
LT		 1635#endif
1636 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1637 snd_pcm_format_set_silence(format,
1638 runtime->oss.buffer,
1639 size * 8 / width);
1640 err = snd_pcm_oss_sync1(substream, size);
e3a5d59a
TI		 1641 if (err < 0) {
1642 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1643 return err;
e3a5d59a 1644 }
1da177e4
LT		 1645 }
1646 /*
1647 * The ALSA's period might be a bit large than OSS one.
1648 * Fill the remain portion of ALSA period with zeros.
1649 */
1650 size = runtime->control->appl_ptr % runtime->period_size;
1651 if (size > 0) {
1652 size = runtime->period_size - size;
1653 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1654 size = (runtime->frame_bits * size) / 8;
1655 while (size > 0) {
1656 mm_segment_t fs;
1657 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1658 size -= size1;
1659 size1 *= 8;
1660 size1 /= runtime->sample_bits;
1661 snd_pcm_format_set_silence(runtime->format,
1662 runtime->oss.buffer,
1663 size1);
4939c660 1664 size1 /= runtime->channels; /* frames */
1da177e4 1665 fs = snd_enter_user();
fea952e5 1666 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1da177e4
LT		 1667 snd_leave_user(fs);
1668 }
1669 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1670 void __user *buffers[runtime->channels];
1671 memset(buffers, 0, runtime->channels * sizeof(void *));
1672 snd_pcm_lib_writev(substream, buffers, size);
1673 }
1674 }
e3a5d59a 1675 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1676 /*
1677 * finish sync: drain the buffer
1678 */
1679 __direct:
0df63e44
TI		 1680 saved_f_flags = substream->f_flags;
1681 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1682 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1683 substream->f_flags = saved_f_flags;
1da177e4
LT		 1684 if (err < 0)
1685 return err;
1686 runtime->oss.prepare = 1;
1687 }
1688
1689 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1690 if (substream != NULL) {
1691 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1692 return err;
1693 runtime = substream->runtime;
bf1bbb5a 1694 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1695 if (err < 0)
1696 return err;
1697 runtime->oss.buffer_used = 0;
1698 runtime->oss.prepare = 1;
1699 }
1700 return 0;
1701}
1702
6ac77bc1 1703static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1704{
1705 int idx;
1706
1707 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1708 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1709 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1710 if (substream == NULL)
1711 continue;
1712 runtime = substream->runtime;
1713 if (rate < 1000)
1714 rate = 1000;
1715 else if (rate > 192000)
1716 rate = 192000;
1717 if (runtime->oss.rate != rate) {
1718 runtime->oss.params = 1;
1719 runtime->oss.rate = rate;
1720 }
1721 }
1722 return snd_pcm_oss_get_rate(pcm_oss_file);
1723}
1724
6ac77bc1 1725static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1726{
6ac77bc1 1727 struct snd_pcm_substream *substream;
1da177e4
LT		 1728 int err;
1729
1730 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1731 return err;
1732 return substream->runtime->oss.rate;
1733}
1734
6ac77bc1 1735static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1736{
1737 int idx;
1738 if (channels < 1)
1739 channels = 1;
1740 if (channels > 128)
1741 return -EINVAL;
1742 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1743 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1744 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1745 if (substream == NULL)
1746 continue;
1747 runtime = substream->runtime;
1748 if (runtime->oss.channels != channels) {
1749 runtime->oss.params = 1;
1750 runtime->oss.channels = channels;
1751 }
1752 }
1753 return snd_pcm_oss_get_channels(pcm_oss_file);
1754}
1755
6ac77bc1 1756static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1757{
6ac77bc1 1758 struct snd_pcm_substream *substream;
1da177e4
LT		 1759 int err;
1760
1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762 return err;
1763 return substream->runtime->oss.channels;
1764}
1765
6ac77bc1 1766static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1767{
6ac77bc1 1768 struct snd_pcm_substream *substream;
1da177e4
LT		 1769 int err;
1770
1771 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1772 return err;
1773 return substream->runtime->oss.period_bytes;
1774}
1775
6ac77bc1 1776static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1777{
6ac77bc1 1778 struct snd_pcm_substream *substream;
1da177e4
LT		 1779 int err;
1780 int direct;
6ac77bc1 1781 struct snd_pcm_hw_params *params;
1da177e4 1782 unsigned int formats = 0;
6ac77bc1 1783 struct snd_mask format_mask;
1da177e4
LT		 1784 int fmt;
1785
1786 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1787 return err;
9c323fcb 1788 if (atomic_read(&substream->mmap_count))
1da177e4 1789 direct = 1;
060d77b9
TI		 1790 else
1791 direct = substream->oss.setup.direct;
1da177e4
LT		 1792 if (!direct)
1793 return AFMT_MU_LAW | AFMT_U8 |
1794 AFMT_S16_LE | AFMT_S16_BE |
1795 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1796 AFMT_U16_BE |
1797 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1798 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1799 AFMT_S24_PACKED;
1da177e4
LT		 1800 params = kmalloc(sizeof(*params), GFP_KERNEL);
1801 if (!params)
1802 return -ENOMEM;
1803 _snd_pcm_hw_params_any(params);
1804 err = snd_pcm_hw_refine(substream, params);
1805 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1806 kfree(params);
7eaa943c
TI		 1807 if (err < 0)
1808 return err;
1da177e4
LT		 1809 for (fmt = 0; fmt < 32; ++fmt) {
1810 if (snd_mask_test(&format_mask, fmt)) {
1811 int f = snd_pcm_oss_format_to(fmt);
1812 if (f >= 0)
1813 formats |= f;
1814 }
1815 }
1816 return formats;
1817}
1818
6ac77bc1 1819static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1820{
1821 int formats, idx;
1822
1823 if (format != AFMT_QUERY) {
1824 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1825 if (formats < 0)
1826 return formats;
1da177e4
LT		 1827 if (!(formats & format))
1828 format = AFMT_U8;
1829 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1830 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1831 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1832 if (substream == NULL)
1833 continue;
1834 runtime = substream->runtime;
1835 if (runtime->oss.format != format) {
1836 runtime->oss.params = 1;
1837 runtime->oss.format = format;
1838 }
1839 }
1840 }
1841 return snd_pcm_oss_get_format(pcm_oss_file);
1842}
1843
6ac77bc1 1844static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1845{
6ac77bc1 1846 struct snd_pcm_substream *substream;
1da177e4
LT		 1847 int err;
1848
1849 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1850 return err;
1851 return substream->runtime->oss.format;
1852}
1853
6ac77bc1 1854static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1855{
6ac77bc1 1856 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1857
1858 if (substream == NULL)
1859 return 0;
1860 runtime = substream->runtime;
1861 if (subdivide == 0) {
1862 subdivide = runtime->oss.subdivision;
1863 if (subdivide == 0)
1864 subdivide = 1;
1865 return subdivide;
1866 }
1867 if (runtime->oss.subdivision || runtime->oss.fragshift)
1868 return -EINVAL;
1869 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1870 subdivide != 8 && subdivide != 16)
1871 return -EINVAL;
1872 runtime->oss.subdivision = subdivide;
1873 runtime->oss.params = 1;
1874 return subdivide;
1875}
1876
6ac77bc1 1877static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1878{
1879 int err = -EINVAL, idx;
1880
1881 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1882 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1883 if (substream == NULL)
1884 continue;
1885 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1886 return err;
1887 }
1888 return err;
1889}
1890
6ac77bc1 1891static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1892{
6ac77bc1 1893 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1894
1895 if (substream == NULL)
1896 return 0;
1897 runtime = substream->runtime;
1898 if (runtime->oss.subdivision || runtime->oss.fragshift)
1899 return -EINVAL;
1900 runtime->oss.fragshift = val & 0xffff;
1901 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1902 if (runtime->oss.fragshift < 4) /* < 16 */
1903 runtime->oss.fragshift = 4;
1904 if (runtime->oss.maxfrags < 2)
1905 runtime->oss.maxfrags = 2;
1906 runtime->oss.params = 1;
1907 return 0;
1908}
1909
6ac77bc1 1910static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1911{
1912 int err = -EINVAL, idx;
1913
1914 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1915 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1916 if (substream == NULL)
1917 continue;
1918 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1919 return err;
1920 }
1921 return err;
1922}
1923
1924static int snd_pcm_oss_nonblock(struct file * file)
1925{
db1dd4d3 1926 spin_lock(&file->f_lock);
1da177e4 1927 file->f_flags |= O_NONBLOCK;
db1dd4d3 1928 spin_unlock(&file->f_lock);
1da177e4
LT		 1929 return 0;
1930}
1931
6ac77bc1 1932static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1933{
1934
1935 if (substream == NULL) {
1936 res &= ~DSP_CAP_DUPLEX;
1937 return res;
1938 }
1939#ifdef DSP_CAP_MULTI
1940 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1941 if (substream->pstr->substream_count > 1)
1942 res |= DSP_CAP_MULTI;
1943#endif
1944 /* DSP_CAP_REALTIME is set all times: */
1945 /* all ALSA drivers can return actual pointer in ring buffer */
1946#if defined(DSP_CAP_REALTIME) && 0
1947 {
6ac77bc1 1948 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1949 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1950 res &= ~DSP_CAP_REALTIME;
1951 }
1952#endif
1953 return res;
1954}
1955
6ac77bc1 1956static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1957{
1958 int result, idx;
1959
1960 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1961 for (idx = 0; idx < 2; idx++) {
6ac77bc1 1962 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1963 result = snd_pcm_oss_get_caps1(substream, result);
1964 }
1965 result |= 0x0001; /* revision - same as SB AWE 64 */
1966 return result;
1967}
1968
f240406b
JK		 1969static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1970 snd_pcm_uframes_t hw_ptr)
1da177e4 1971{
6ac77bc1 1972 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1973 snd_pcm_uframes_t appl_ptr;
1974 appl_ptr = hw_ptr + runtime->buffer_size;
1975 appl_ptr %= runtime->boundary;
1976 runtime->control->appl_ptr = appl_ptr;
1977}
1978
6ac77bc1 1979static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 1980{
6ac77bc1
TI		 1981 struct snd_pcm_runtime *runtime;
1982 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 1983 int err, cmd;
1984
1985#ifdef OSS_DEBUG
61efcee8 1986 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 1987#endif
1988
1989 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1990 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1991
1992 if (psubstream) {
1993 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1994 return err;
1995 }
1996 if (csubstream) {
1997 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1998 return err;
1999 }
2000 if (psubstream) {
2001 runtime = psubstream->runtime;
2002 if (trigger & PCM_ENABLE_OUTPUT) {
2003 if (runtime->oss.trigger)
2004 goto _skip1;
9c323fcb 2005 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 2006 snd_pcm_oss_simulate_fill(psubstream,
2007 get_hw_ptr_period(runtime));
1da177e4
LT		 2008 runtime->oss.trigger = 1;
2009 runtime->start_threshold = 1;
2010 cmd = SNDRV_PCM_IOCTL_START;
2011 } else {
2012 if (!runtime->oss.trigger)
2013 goto _skip1;
2014 runtime->oss.trigger = 0;
2015 runtime->start_threshold = runtime->boundary;
2016 cmd = SNDRV_PCM_IOCTL_DROP;
2017 runtime->oss.prepare = 1;
2018 }
bf1bbb5a 2019 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1da177e4
LT		 2020 if (err < 0)
2021 return err;
2022 }
2023 _skip1:
2024 if (csubstream) {
2025 runtime = csubstream->runtime;
2026 if (trigger & PCM_ENABLE_INPUT) {
2027 if (runtime->oss.trigger)
2028 goto _skip2;
2029 runtime->oss.trigger = 1;
2030 runtime->start_threshold = 1;
2031 cmd = SNDRV_PCM_IOCTL_START;
2032 } else {
2033 if (!runtime->oss.trigger)
2034 goto _skip2;
2035 runtime->oss.trigger = 0;
2036 runtime->start_threshold = runtime->boundary;
2037 cmd = SNDRV_PCM_IOCTL_DROP;
2038 runtime->oss.prepare = 1;
2039 }
bf1bbb5a 2040 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1da177e4
LT		 2041 if (err < 0)
2042 return err;
2043 }
2044 _skip2:
2045 return 0;
2046}
2047
6ac77bc1 2048static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2049{
6ac77bc1 2050 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2051 int result = 0;
2052
2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2055 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2056 result |= PCM_ENABLE_OUTPUT;
2057 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2058 result |= PCM_ENABLE_INPUT;
2059 return result;
2060}
2061
6ac77bc1 2062static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2063{
6ac77bc1
TI		 2064 struct snd_pcm_substream *substream;
2065 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2066 snd_pcm_sframes_t delay;
2067 int err;
2068
2069 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2070 if (substream == NULL)
2071 return -EINVAL;
2072 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2073 return err;
2074 runtime = substream->runtime;
2075 if (runtime->oss.params || runtime->oss.prepare)
2076 return 0;
bf1bbb5a 2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 2078 if (err == -EPIPE)
2079 delay = 0; /* hack for broken OSS applications */
2080 else if (err < 0)
2081 return err;
2082 return snd_pcm_oss_bytes(substream, delay);
2083}
2084
6ac77bc1 2085static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2086{
6ac77bc1
TI		 2087 struct snd_pcm_substream *substream;
2088 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2089 snd_pcm_sframes_t delay;
2090 int fixup;
2091 struct count_info info;
2092 int err;
2093
2094 if (_info == NULL)
2095 return -EFAULT;
2096 substream = pcm_oss_file->streams[stream];
2097 if (substream == NULL)
2098 return -EINVAL;
2099 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2100 return err;
2101 runtime = substream->runtime;
2102 if (runtime->oss.params || runtime->oss.prepare) {
2103 memset(&info, 0, sizeof(info));
2104 if (copy_to_user(_info, &info, sizeof(info)))
2105 return -EFAULT;
2106 return 0;
2107 }
2108 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2110 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2111 err = 0;
2112 delay = 0;
2113 fixup = 0;
2114 } else {
2115 fixup = runtime->oss.buffer_used;
2116 }
2117 } else {
2118 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2119 fixup = -runtime->oss.buffer_used;
2120 }
2121 if (err < 0)
2122 return err;
2123 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
9c323fcb 2124 if (atomic_read(&substream->mmap_count)) {
1da177e4 2125 snd_pcm_sframes_t n;
f240406b
JK		 2126 delay = get_hw_ptr_period(runtime);
2127 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2128 if (n < 0)
2129 n += runtime->boundary;
2130 info.blocks = n / runtime->period_size;
f240406b 2131 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 2132 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2133 snd_pcm_oss_simulate_fill(substream, delay);
2134 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2135 } else {
5ac0fab9 2136 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2138 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2139 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2140 else
2141 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2142 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2143 } else {
5ac0fab9
JK		 2144 delay += fixup;
2145 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2146 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2147 }
1da177e4
LT		 2148 }
2149 if (copy_to_user(_info, &info, sizeof(info)))
2150 return -EFAULT;
2151 return 0;
2152}
2153
6ac77bc1 2154static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2155{
6ac77bc1
TI		 2156 struct snd_pcm_substream *substream;
2157 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2158 snd_pcm_sframes_t avail;
2159 int fixup;
2160 struct audio_buf_info info;
2161 int err;
2162
2163 if (_info == NULL)
2164 return -EFAULT;
2165 substream = pcm_oss_file->streams[stream];
2166 if (substream == NULL)
2167 return -EINVAL;
2168 runtime = substream->runtime;
2169
2170 if (runtime->oss.params &&
b2483716 2171 (err = snd_pcm_oss_change_params(substream, false)) < 0)
1da177e4
LT		 2172 return err;
2173
2174 info.fragsize = runtime->oss.period_bytes;
2175 info.fragstotal = runtime->periods;
2176 if (runtime->oss.prepare) {
2177 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2178 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2179 info.fragments = runtime->oss.periods;
2180 } else {
2181 info.bytes = 0;
2182 info.fragments = 0;
2183 }
2184 } else {
2185 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2187 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2188 avail = runtime->buffer_size;
2189 err = 0;
2190 fixup = 0;
2191 } else {
2192 avail = runtime->buffer_size - avail;
2193 fixup = -runtime->oss.buffer_used;
2194 }
2195 } else {
2196 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2197 fixup = runtime->oss.buffer_used;
2198 }
2199 if (err < 0)
2200 return err;
2201 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2202 info.fragments = info.bytes / runtime->oss.period_bytes;
2203 }
2204
2205#ifdef OSS_DEBUG
61efcee8
TI		 2206 pcm_dbg(substream->pcm,
2207 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2208 info.bytes, info.fragments, info.fragstotal, info.fragsize);
1da177e4
LT		 2209#endif
2210 if (copy_to_user(_info, &info, sizeof(info)))
2211 return -EFAULT;
2212 return 0;
2213}
2214
6ac77bc1 2215static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2216{
2217 // it won't be probably implemented
61efcee8 2218 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
1da177e4
LT		 2219 return -EINVAL;
2220}
2221
060d77b9 2222static const char *strip_task_path(const char *path)
1da177e4 2223{
060d77b9
TI		 2224 const char *ptr, *ptrl = NULL;
2225 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2226 if (*ptr == '/')
2227 ptrl = ptr + 1;
1da177e4 2228 }
060d77b9
TI		 2229 return ptrl;
2230}
2231
2232static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2233 const char *task_name,
2234 struct snd_pcm_oss_setup *rsetup)
2235{
2236 struct snd_pcm_oss_setup *setup;
2237
2238 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2239 do {
2240 for (setup = pcm->streams[stream].oss.setup_list; setup;
2241 setup = setup->next) {
2242 if (!strcmp(setup->task_name, task_name))
2243 goto out;
1da177e4 2244 }
060d77b9
TI		 2245 } while ((task_name = strip_task_path(task_name)) != NULL);
2246 out:
2247 if (setup)
2248 *rsetup = *setup;
1a60d4c5 2249 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 2250}
2251
3bf75f9b
TI		 2252static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2253{
2254 struct snd_pcm_runtime *runtime;
2255 runtime = substream->runtime;
2256 vfree(runtime->oss.buffer);
2257 runtime->oss.buffer = NULL;
2258#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2259 snd_pcm_oss_plugin_clear(substream);
2260#endif
2261 substream->oss.oss = 0;
2262}
2263
6ac77bc1
TI		 2264static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2265 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2266 int minor)
2267{
6ac77bc1 2268 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2269
2270 substream->oss.oss = 1;
060d77b9 2271 substream->oss.setup = *setup;
3bf75f9b 2272 if (setup->nonblock)
0df63e44 2273 substream->f_flags |= O_NONBLOCK;
1576274d 2274 else if (setup->block)
0df63e44 2275 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2276 runtime = substream->runtime;
2277 runtime->oss.params = 1;
2278 runtime->oss.trigger = 1;
2279 runtime->oss.rate = 8000;
e3a5d59a 2280 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 2281 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2282 case SNDRV_MINOR_OSS_PCM_8:
2283 runtime->oss.format = AFMT_U8;
2284 break;
2285 case SNDRV_MINOR_OSS_PCM_16:
2286 runtime->oss.format = AFMT_S16_LE;
2287 break;
2288 default:
2289 runtime->oss.format = AFMT_MU_LAW;
2290 }
2291 runtime->oss.channels = 1;
2292 runtime->oss.fragshift = 0;
2293 runtime->oss.maxfrags = 0;
2294 runtime->oss.subdivision = 0;
3bf75f9b 2295 substream->pcm_release = snd_pcm_oss_release_substream;
1da177e4
LT		 2296}
2297
6ac77bc1 2298static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2299{
2300 int cidx;
7eaa943c
TI		 2301 if (!pcm_oss_file)
2302 return 0;
1da177e4 2303 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2304 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2305 if (substream)
2306 snd_pcm_release_substream(substream);
1da177e4
LT		 2307 }
2308 kfree(pcm_oss_file);
2309 return 0;
2310}
2311
2312static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2313 struct snd_pcm *pcm,
2314 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2315 int minor,
060d77b9 2316 struct snd_pcm_oss_setup *setup)
1da177e4 2317{
3bf75f9b 2318 int idx, err;
6ac77bc1 2319 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2320 struct snd_pcm_substream *substream;
aeb5d727 2321 fmode_t f_mode = file->f_mode;
1da177e4 2322
7eaa943c
TI		 2323 if (rpcm_oss_file)
2324 *rpcm_oss_file = NULL;
1da177e4 2325
ca2c0966 2326 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 2327 if (pcm_oss_file == NULL)
2328 return -ENOMEM;
2329
2330 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2331 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2332 f_mode = FMODE_WRITE;
3bf75f9b 2333
0df63e44 2334 file->f_flags &= ~O_APPEND;
3bf75f9b 2335 for (idx = 0; idx < 2; idx++) {
060d77b9 2336 if (setup[idx].disable)
3bf75f9b 2337 continue;
6cb53e7e
TI		 2338 if (! pcm->streams[idx].substream_count)
2339 continue; /* no matching substream */
3bf75f9b
TI		 2340 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2341 if (! (f_mode & FMODE_WRITE))
2342 continue;
2343 } else {
2344 if (! (f_mode & FMODE_READ))
2345 continue;
2346 }
2347 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2348 if (err < 0) {
1da177e4
LT		 2349 snd_pcm_oss_release_file(pcm_oss_file);
2350 return err;
2351 }
3bf75f9b
TI		 2352
2353 pcm_oss_file->streams[idx] = substream;
1576274d 2354 substream->file = pcm_oss_file;
060d77b9 2355 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2356 }
2357
bbdc1b7d 2358 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2359 snd_pcm_oss_release_file(pcm_oss_file);
2360 return -EINVAL;
2361 }
1da177e4
LT		 2362
2363 file->private_data = pcm_oss_file;
7eaa943c
TI		 2364 if (rpcm_oss_file)
2365 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2366 return 0;
2367}
2368
2369
93f2e378
TI		 2370static int snd_task_name(struct task_struct *task, char *name, size_t size)
2371{
2372 unsigned int idx;
2373
7eaa943c
TI		 2374 if (snd_BUG_ON(!task || !name || size < 2))
2375 return -EINVAL;
93f2e378
TI		 2376 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2377 name[idx] = task->comm[idx];
2378 name[idx] = '\0';
2379 return 0;
2380}
2381
1da177e4
LT		 2382static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2383{
1da177e4
LT		 2384 int err;
2385 char task_name[32];
6ac77bc1
TI		 2386 struct snd_pcm *pcm;
2387 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2388 struct snd_pcm_oss_setup setup[2];
1da177e4
LT		 2389 int nonblock;
2390 wait_queue_t wait;
2391
02f4865f
TI		 2392 err = nonseekable_open(inode, file);
2393 if (err < 0)
2394 return err;
2395
f87135f5
CL		 2396 pcm = snd_lookup_oss_minor_data(iminor(inode),
2397 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 2398 if (pcm == NULL) {
2399 err = -ENODEV;
2400 goto __error1;
2401 }
2402 err = snd_card_file_add(pcm->card, file);
2403 if (err < 0)
2404 goto __error1;
2405 if (!try_module_get(pcm->card->module)) {
2406 err = -EFAULT;
2407 goto __error2;
2408 }
2409 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2410 err = -EFAULT;
2411 goto __error;
2412 }
1576274d 2413 memset(setup, 0, sizeof(setup));
1da177e4 2414 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2415 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2416 task_name, &setup[0]);
1da177e4 2417 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2418 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2419 task_name, &setup[1]);
1da177e4
LT		 2420
2421 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2422 if (!nonblock)
2423 nonblock = nonblock_open;
2424
2425 init_waitqueue_entry(&wait, current);
2426 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2427 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2428 while (1) {
2429 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2430 iminor(inode), setup);
1da177e4
LT		 2431 if (err >= 0)
2432 break;
2433 if (err == -EAGAIN) {
2434 if (nonblock) {
2435 err = -EBUSY;
2436 break;
2437 }
2438 } else
2439 break;
2440 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2441 mutex_unlock(&pcm->open_mutex);
1da177e4 2442 schedule();
1a60d4c5 2443 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2444 if (pcm->card->shutdown) {
2445 err = -ENODEV;
2446 break;
2447 }
1da177e4
LT		 2448 if (signal_pending(current)) {
2449 err = -ERESTARTSYS;
2450 break;
2451 }
2452 }
2453 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2454 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2455 if (err < 0)
2456 goto __error;
8bb4d9ce 2457 snd_card_unref(pcm->card);
1da177e4
LT		 2458 return err;
2459
2460 __error:
2461 module_put(pcm->card->module);
2462 __error2:
2463 snd_card_file_remove(pcm->card, file);
2464 __error1:
a0830dbd
TI		 2465 if (pcm)
2466 snd_card_unref(pcm->card);
1da177e4
LT		 2467 return err;
2468}
2469
2470static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2471{
6ac77bc1
TI		 2472 struct snd_pcm *pcm;
2473 struct snd_pcm_substream *substream;
2474 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2475
2476 pcm_oss_file = file->private_data;
2477 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2478 if (substream == NULL)
2479 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
7eaa943c
TI		 2480 if (snd_BUG_ON(!substream))
2481 return -ENXIO;
1da177e4 2482 pcm = substream->pcm;
de1b8b93
TI		 2483 if (!pcm->card->shutdown)
2484 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2485 mutex_lock(&pcm->open_mutex);
1da177e4 2486 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2487 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2488 wake_up(&pcm->open_wait);
2489 module_put(pcm->card->module);
2490 snd_card_file_remove(pcm->card, file);
2491 return 0;
2492}
2493
2494static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2495{
6ac77bc1 2496 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2497 int __user *p = (int __user *)arg;
2498 int res;
2499
2500 pcm_oss_file = file->private_data;
2501 if (cmd == OSS_GETVERSION)
2502 return put_user(SNDRV_OSS_VERSION, p);
2503 if (cmd == OSS_ALSAEMULVER)
2504 return put_user(1, p);
658355b5 2505#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
1da177e4 2506 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2507 struct snd_pcm_substream *substream;
1da177e4
LT		 2508 int idx;
2509 for (idx = 0; idx < 2; ++idx) {
2510 substream = pcm_oss_file->streams[idx];
2511 if (substream != NULL)
2512 break;
2513 }
7eaa943c
TI		 2514 if (snd_BUG_ON(idx >= 2))
2515 return -ENXIO;
1da177e4
LT		 2516 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2517 }
2518#endif
2519 if (((cmd >> 8) & 0xff) != 'P')
2520 return -EINVAL;
2521#ifdef OSS_DEBUG
61efcee8 2522 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 2523#endif
2524 switch (cmd) {
2525 case SNDCTL_DSP_RESET:
2526 return snd_pcm_oss_reset(pcm_oss_file);
2527 case SNDCTL_DSP_SYNC:
2528 return snd_pcm_oss_sync(pcm_oss_file);
2529 case SNDCTL_DSP_SPEED:
2530 if (get_user(res, p))
2531 return -EFAULT;
2532 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2533 return res;
2534 return put_user(res, p);
2535 case SOUND_PCM_READ_RATE:
2536 res = snd_pcm_oss_get_rate(pcm_oss_file);
2537 if (res < 0)
2538 return res;
2539 return put_user(res, p);
2540 case SNDCTL_DSP_STEREO:
2541 if (get_user(res, p))
2542 return -EFAULT;
2543 res = res > 0 ? 2 : 1;
2544 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2545 return res;
2546 return put_user(--res, p);
2547 case SNDCTL_DSP_GETBLKSIZE:
2548 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2549 if (res < 0)
2550 return res;
2551 return put_user(res, p);
2552 case SNDCTL_DSP_SETFMT:
2553 if (get_user(res, p))
2554 return -EFAULT;
2555 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2556 if (res < 0)
2557 return res;
2558 return put_user(res, p);
2559 case SOUND_PCM_READ_BITS:
2560 res = snd_pcm_oss_get_format(pcm_oss_file);
2561 if (res < 0)
2562 return res;
2563 return put_user(res, p);
2564 case SNDCTL_DSP_CHANNELS:
2565 if (get_user(res, p))
2566 return -EFAULT;
2567 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2568 if (res < 0)
2569 return res;
2570 return put_user(res, p);
2571 case SOUND_PCM_READ_CHANNELS:
2572 res = snd_pcm_oss_get_channels(pcm_oss_file);
2573 if (res < 0)
2574 return res;
2575 return put_user(res, p);
2576 case SOUND_PCM_WRITE_FILTER:
2577 case SOUND_PCM_READ_FILTER:
2578 return -EIO;
2579 case SNDCTL_DSP_POST:
2580 return snd_pcm_oss_post(pcm_oss_file);
2581 case SNDCTL_DSP_SUBDIVIDE:
2582 if (get_user(res, p))
2583 return -EFAULT;
2584 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2585 if (res < 0)
2586 return res;
2587 return put_user(res, p);
2588 case SNDCTL_DSP_SETFRAGMENT:
2589 if (get_user(res, p))
2590 return -EFAULT;
2591 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2592 case SNDCTL_DSP_GETFMTS:
2593 res = snd_pcm_oss_get_formats(pcm_oss_file);
2594 if (res < 0)
2595 return res;
2596 return put_user(res, p);
2597 case SNDCTL_DSP_GETOSPACE:
2598 case SNDCTL_DSP_GETISPACE:
2599 return snd_pcm_oss_get_space(pcm_oss_file,
2600 cmd == SNDCTL_DSP_GETISPACE ?
2601 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2602 (struct audio_buf_info __user *) arg);
2603 case SNDCTL_DSP_NONBLOCK:
2604 return snd_pcm_oss_nonblock(file);
2605 case SNDCTL_DSP_GETCAPS:
2606 res = snd_pcm_oss_get_caps(pcm_oss_file);
2607 if (res < 0)
2608 return res;
2609 return put_user(res, p);
2610 case SNDCTL_DSP_GETTRIGGER:
2611 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2612 if (res < 0)
2613 return res;
2614 return put_user(res, p);
2615 case SNDCTL_DSP_SETTRIGGER:
2616 if (get_user(res, p))
2617 return -EFAULT;
2618 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2619 case SNDCTL_DSP_GETIPTR:
2620 case SNDCTL_DSP_GETOPTR:
2621 return snd_pcm_oss_get_ptr(pcm_oss_file,
2622 cmd == SNDCTL_DSP_GETIPTR ?
2623 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2624 (struct count_info __user *) arg);
2625 case SNDCTL_DSP_MAPINBUF:
2626 case SNDCTL_DSP_MAPOUTBUF:
2627 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2628 cmd == SNDCTL_DSP_MAPINBUF ?
2629 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2630 (struct buffmem_desc __user *) arg);
2631 case SNDCTL_DSP_SETSYNCRO:
2632 /* stop DMA now.. */
2633 return 0;
2634 case SNDCTL_DSP_SETDUPLEX:
2635 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2636 return 0;
2637 return -EIO;
2638 case SNDCTL_DSP_GETODELAY:
2639 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2640 if (res < 0) {
2641 /* it's for sure, some broken apps don't check for error codes */
2642 put_user(0, p);
2643 return res;
2644 }
2645 return put_user(res, p);
2646 case SNDCTL_DSP_PROFILE:
2647 return 0; /* silently ignore */
2648 default:
61efcee8 2649 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
1da177e4
LT		 2650 }
2651 return -EINVAL;
2652}
2653
2654#ifdef CONFIG_COMPAT
2655/* all compatible */
83266b6b
TI		 2656static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2657 unsigned long arg)
2658{
2659 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2660}
1da177e4
LT		 2661#else
2662#define snd_pcm_oss_ioctl_compat NULL
2663#endif
2664
2665static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2666{
6ac77bc1
TI		 2667 struct snd_pcm_oss_file *pcm_oss_file;
2668 struct snd_pcm_substream *substream;
1da177e4
LT		 2669
2670 pcm_oss_file = file->private_data;
2671 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2672 if (substream == NULL)
2673 return -ENXIO;
0df63e44 2674 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 2675#ifndef OSS_DEBUG
2676 return snd_pcm_oss_read1(substream, buf, count);
2677#else
2678 {
2679 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
61efcee8
TI		 2680 pcm_dbg(substream->pcm,
2681 "pcm_oss: read %li bytes (returned %li bytes)\n",
2682 (long)count, (long)res);
1da177e4
LT		 2683 return res;
2684 }
2685#endif
2686}
2687
2688static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2689{
6ac77bc1
TI		 2690 struct snd_pcm_oss_file *pcm_oss_file;
2691 struct snd_pcm_substream *substream;
1da177e4
LT		 2692 long result;
2693
2694 pcm_oss_file = file->private_data;
2695 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2696 if (substream == NULL)
2697 return -ENXIO;
0df63e44 2698 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2699 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2700#ifdef OSS_DEBUG
61efcee8 2701 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
006de267 2702 (long)count, (long)result);
1da177e4
LT		 2703#endif
2704 return result;
2705}
2706
6ac77bc1 2707static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2708{
6ac77bc1 2709 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2710 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2711 return runtime->oss.prev_hw_ptr_period !=
2712 get_hw_ptr_period(runtime);
1da177e4 2713 else
f240406b
JK		 2714 return snd_pcm_playback_avail(runtime) >=
2715 runtime->oss.period_frames;
1da177e4
LT		 2716}
2717
6ac77bc1 2718static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2719{
6ac77bc1 2720 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2721 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2722 return runtime->oss.prev_hw_ptr_period !=
2723 get_hw_ptr_period(runtime);
1da177e4 2724 else
f240406b
JK		 2725 return snd_pcm_capture_avail(runtime) >=
2726 runtime->oss.period_frames;
1da177e4
LT		 2727}
2728
2729static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2730{
6ac77bc1 2731 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4 2732 unsigned int mask;
6ac77bc1 2733 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2734
2735 pcm_oss_file = file->private_data;
2736
2737 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2738 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2739
2740 mask = 0;
2741 if (psubstream != NULL) {
6ac77bc1 2742 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2743 poll_wait(file, &runtime->sleep, wait);
2744 snd_pcm_stream_lock_irq(psubstream);
2745 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2746 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2747 snd_pcm_oss_playback_ready(psubstream)))
2748 mask |= POLLOUT | POLLWRNORM;
2749 snd_pcm_stream_unlock_irq(psubstream);
2750 }
2751 if (csubstream != NULL) {
6ac77bc1
TI		 2752 struct snd_pcm_runtime *runtime = csubstream->runtime;
2753 snd_pcm_state_t ostate;
1da177e4
LT		 2754 poll_wait(file, &runtime->sleep, wait);
2755 snd_pcm_stream_lock_irq(csubstream);
2756 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2757 snd_pcm_oss_capture_ready(csubstream))
2758 mask |= POLLIN | POLLRDNORM;
2759 snd_pcm_stream_unlock_irq(csubstream);
2760 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2761 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2762 memset(&ofile, 0, sizeof(ofile));
2763 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2764 runtime->oss.trigger = 0;
2765 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2766 }
2767 }
2768
2769 return mask;
2770}
2771
2772static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2773{
6ac77bc1
TI		 2774 struct snd_pcm_oss_file *pcm_oss_file;
2775 struct snd_pcm_substream *substream = NULL;
2776 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2777 int err;
2778
2779#ifdef OSS_DEBUG
61efcee8 2780 pr_debug("pcm_oss: mmap begin\n");
1da177e4
LT		 2781#endif
2782 pcm_oss_file = file->private_data;
2783 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2784 case VM_READ | VM_WRITE:
2785 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2786 if (substream)
2787 break;
2788 /* Fall through */
2789 case VM_READ:
2790 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2791 break;
2792 case VM_WRITE:
2793 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2794 break;
2795 default:
2796 return -EINVAL;
2797 }
2798 /* set VM_READ access as well to fix memset() routines that do
2799 reads before writes (to improve performance) */
2800 area->vm_flags |= VM_READ;
2801 if (substream == NULL)
2802 return -ENXIO;
2803 runtime = substream->runtime;
2804 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2805 return -EIO;
2806 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2807 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2808 else
2809 return -EIO;
2810
2811 if (runtime->oss.params) {
b2483716
TI		 2812 /* use mutex_trylock() for params_lock for avoiding a deadlock
2813 * between mmap_sem and params_lock taken by
2814 * copy_from/to_user() in snd_pcm_oss_write/read()
2815 */
2816 err = snd_pcm_oss_change_params(substream, true);
2817 if (err < 0)
1da177e4
LT		 2818 return err;
2819 }
21a3479a 2820#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2821 if (runtime->oss.plugin_first != NULL)
2822 return -EIO;
21a3479a 2823#endif
1da177e4
LT		 2824
2825 if (area->vm_pgoff != 0)
2826 return -EINVAL;
2827
2828 err = snd_pcm_mmap_data(substream, file, area);
2829 if (err < 0)
2830 return err;
2831 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2832 runtime->silence_threshold = 0;
2833 runtime->silence_size = 0;
2834#ifdef OSS_DEBUG
61efcee8 2835 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
006de267 2836 runtime->oss.mmap_bytes);
1da177e4
LT		 2837#endif
2838 /* In mmap mode we never stop */
2839 runtime->stop_threshold = runtime->boundary;
2840
2841 return 0;
2842}
2843
b7d90a35 2844#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2845/*
2846 * /proc interface
2847 */
2848
6ac77bc1
TI		 2849static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2850 struct snd_info_buffer *buffer)
1da177e4 2851{
6ac77bc1
TI		 2852 struct snd_pcm_str *pstr = entry->private_data;
2853 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2854 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2855 while (setup) {
2856 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2857 setup->task_name,
2858 setup->periods,
2859 setup->period_size,
2860 setup->disable ? " disable" : "",
2861 setup->direct ? " direct" : "",
2862 setup->block ? " block" : "",
2863 setup->nonblock ? " non-block" : "",
2864 setup->partialfrag ? " partial-frag" : "",
2865 setup->nosilence ? " no-silence" : "");
2866 setup = setup->next;
2867 }
1a60d4c5 2868 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2869}
2870
6ac77bc1 2871static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2872{
6ac77bc1 2873 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2874
1da177e4
LT		 2875 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2876 setup; setup = setupn) {
2877 setupn = setup->next;
2878 kfree(setup->task_name);
2879 kfree(setup);
2880 }
2881 pstr->oss.setup_list = NULL;
2882}
2883
6ac77bc1
TI		 2884static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2885 struct snd_info_buffer *buffer)
1da177e4 2886{
6ac77bc1 2887 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2888 char line[128], str[32], task_name[32];
2889 const char *ptr;
1da177e4 2890 int idx1;
6ac77bc1 2891 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2892
2893 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2894 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2895 memset(&template, 0, sizeof(template));
2896 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2897 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2898 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2899 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2900 continue;
2901 }
2902 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2903 if (!strcmp(setup->task_name, task_name)) {
2904 template = *setup;
2905 break;
2906 }
2907 }
2908 ptr = snd_info_get_str(str, ptr, sizeof(str));
2909 template.periods = simple_strtoul(str, NULL, 10);
2910 ptr = snd_info_get_str(str, ptr, sizeof(str));
2911 template.period_size = simple_strtoul(str, NULL, 10);
2912 for (idx1 = 31; idx1 >= 0; idx1--)
2913 if (template.period_size & (1 << idx1))
2914 break;
2915 for (idx1--; idx1 >= 0; idx1--)
2916 template.period_size &= ~(1 << idx1);
2917 do {
2918 ptr = snd_info_get_str(str, ptr, sizeof(str));
2919 if (!strcmp(str, "disable")) {
2920 template.disable = 1;
2921 } else if (!strcmp(str, "direct")) {
2922 template.direct = 1;
2923 } else if (!strcmp(str, "block")) {
2924 template.block = 1;
2925 } else if (!strcmp(str, "non-block")) {
2926 template.nonblock = 1;
2927 } else if (!strcmp(str, "partial-frag")) {
2928 template.partialfrag = 1;
2929 } else if (!strcmp(str, "no-silence")) {
2930 template.nosilence = 1;
10f69f9e
TI		 2931 } else if (!strcmp(str, "buggy-ptr")) {
2932 template.buggyptr = 1;
1da177e4
LT		 2933 }
2934 } while (*str);
2935 if (setup == NULL) {
060d77b9
TI		 2936 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2937 if (! setup) {
2938 buffer->error = -ENOMEM;
91054598 2939 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9
TI		 2940 return;
2941 }
2942 if (pstr->oss.setup_list == NULL)
2943 pstr->oss.setup_list = setup;
2944 else {
2945 for (setup1 = pstr->oss.setup_list;
2946 setup1->next; setup1 = setup1->next);
2947 setup1->next = setup;
2948 }
2949 template.task_name = kstrdup(task_name, GFP_KERNEL);
2950 if (! template.task_name) {
2951 kfree(setup);
1da177e4 2952 buffer->error = -ENOMEM;
91054598 2953 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9 2954 return;
1da177e4
LT		 2955 }
2956 }
060d77b9 2957 *setup = template;
1a60d4c5 2958 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2959 }
2960}
2961
6ac77bc1 2962static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 2963{
2964 int stream;
2965 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 2966 struct snd_info_entry *entry;
2967 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 2968 if (pstr->substream_count == 0)
2969 continue;
2970 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2971 entry->content = SNDRV_INFO_CONTENT_TEXT;
2972 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
1da177e4 2973 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 2974 entry->c.text.write = snd_pcm_oss_proc_write;
2975 entry->private_data = pstr;
2976 if (snd_info_register(entry) < 0) {
2977 snd_info_free_entry(entry);
2978 entry = NULL;
2979 }
2980 }
2981 pstr->oss.proc_entry = entry;
2982 }
2983}
2984
6ac77bc1 2985static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 2986{
2987 int stream;
2988 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 2989 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 2990 snd_info_free_entry(pstr->oss.proc_entry);
2991 pstr->oss.proc_entry = NULL;
2992 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 2993 }
2994}
b7d90a35 2995#else /* !CONFIG_SND_VERBOSE_PROCFS */
04f141a8
TI		 2996#define snd_pcm_oss_proc_init(pcm)
2997#define snd_pcm_oss_proc_done(pcm)
b7d90a35 2998#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 2999
3000/*
3001 * ENTRY functions
3002 */
3003
9c2e08c5 3004static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 3005{
3006 .owner = THIS_MODULE,
3007 .read = snd_pcm_oss_read,
3008 .write = snd_pcm_oss_write,
3009 .open = snd_pcm_oss_open,
3010 .release = snd_pcm_oss_release,
02f4865f 3011 .llseek = no_llseek,
1da177e4
LT		 3012 .poll = snd_pcm_oss_poll,
3013 .unlocked_ioctl = snd_pcm_oss_ioctl,
3014 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3015 .mmap = snd_pcm_oss_mmap,
3016};
3017
6ac77bc1 3018static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4 3019{
1da177e4 3020 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 3021 pcm->card, index, &snd_pcm_oss_f_reg,
80d7d771 3022 pcm) < 0) {
61efcee8 3023 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
d3d579f8 3024 pcm->card->number, pcm->device);
1da177e4
LT		 3025 }
3026}
3027
6ac77bc1 3028static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 3029{
3030 pcm->oss.reg = 0;
896e6cc2 3031 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3032 char name[128];
3033 int duplex;
3034 register_oss_dsp(pcm, 0);
3035 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3036 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3037 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3038 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3039#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3040 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3041 pcm->card->number,
3042 name);
3043#endif
3044 pcm->oss.reg++;
3045 pcm->oss.reg_mask |= 1;
3046 }
896e6cc2 3047 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3048 register_oss_dsp(pcm, 1);
3049 pcm->oss.reg++;
3050 pcm->oss.reg_mask |= 2;
3051 }
3052
3053 if (pcm->oss.reg)
3054 snd_pcm_oss_proc_init(pcm);
3055
3056 return 0;
3057}
3058
6ac77bc1 3059static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3060{
3061 if (pcm->oss.reg) {
3062 if (pcm->oss.reg_mask & 1) {
3063 pcm->oss.reg_mask &= ~1;
3064 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3065 pcm->card, 0);
3066 }
3067 if (pcm->oss.reg_mask & 2) {
3068 pcm->oss.reg_mask &= ~2;
3069 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3070 pcm->card, 1);
3071 }
896e6cc2 3072 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3073#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3074 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3075#endif
3076 }
3077 pcm->oss.reg = 0;
1da177e4
LT		 3078 }
3079 return 0;
3080}
3081
c461482c
TI		 3082static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3083{
3084 snd_pcm_oss_disconnect_minor(pcm);
3085 snd_pcm_oss_proc_done(pcm);
3086 return 0;
3087}
3088
6ac77bc1 3089static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3090{
3091 .n_register = snd_pcm_oss_register_minor,
3092 .n_disconnect = snd_pcm_oss_disconnect_minor,
3093 .n_unregister = snd_pcm_oss_unregister_minor,
3094};
3095
3096static int __init alsa_pcm_oss_init(void)
3097{
3098 int i;
3099 int err;
3100
3101 /* check device map table */
3102 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3103 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3104 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
d3d579f8 3105 i, dsp_map[i]);
1da177e4
LT		 3106 dsp_map[i] = 0;
3107 }
896e6cc2 3108 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3109 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
d3d579f8 3110 i, adsp_map[i]);
1da177e4
LT		 3111 adsp_map[i] = 1;
3112 }
3113 }
3114 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3115 return err;
3116 return 0;
3117}
3118
3119static void __exit alsa_pcm_oss_exit(void)
3120{
3121 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3122}
3123
3124module_init(alsa_pcm_oss_init)
3125module_exit(alsa_pcm_oss_exit)
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