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ALSA: hda: Use BIOS auto-parsing instead of existing model quirk for MEDION MD2
[linux-block.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
LT		 30#include <linux/slab.h>
31#include <linux/time.h>
32#include <linux/vmalloc.h>
33#include <linux/moduleparam.h>
3f7440a6 34#include <linux/math64.h>
543537bd 35#include <linux/string.h>
1da177e4
LT		 36#include <sound/core.h>
37#include <sound/minors.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include "pcm_plugin.h"
41#include <sound/info.h>
42#include <linux/soundcard.h>
43#include <sound/initval.h>
44
45#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
46
6581f4e7 47static int dsp_map[SNDRV_CARDS];
1da177e4
LT		 48static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
49static int nonblock_open = 1;
50
c1017a4c 51MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
1da177e4
LT		 52MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
53MODULE_LICENSE("GPL");
54module_param_array(dsp_map, int, NULL, 0444);
55MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
56module_param_array(adsp_map, int, NULL, 0444);
57MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
58module_param(nonblock_open, bool, 0644);
59MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
60MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
62
6ac77bc1
TI		 63extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
64static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
65static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
66static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
1da177e4
LT		 67
68static inline mm_segment_t snd_enter_user(void)
69{
70 mm_segment_t fs = get_fs();
71 set_fs(get_ds());
72 return fs;
73}
74
75static inline void snd_leave_user(mm_segment_t fs)
76{
77 set_fs(fs);
78}
79
e88e8ae6
TI		 80/*
81 * helper functions to process hw_params
82 */
83static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
84{
85 int changed = 0;
86 if (i->min < min) {
87 i->min = min;
88 i->openmin = openmin;
89 changed = 1;
90 } else if (i->min == min && !i->openmin && openmin) {
91 i->openmin = 1;
92 changed = 1;
93 }
94 if (i->integer) {
95 if (i->openmin) {
96 i->min++;
97 i->openmin = 0;
98 }
99 }
100 if (snd_interval_checkempty(i)) {
101 snd_interval_none(i);
102 return -EINVAL;
103 }
104 return changed;
105}
106
107static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
108{
109 int changed = 0;
110 if (i->max > max) {
111 i->max = max;
112 i->openmax = openmax;
113 changed = 1;
114 } else if (i->max == max && !i->openmax && openmax) {
115 i->openmax = 1;
116 changed = 1;
117 }
118 if (i->integer) {
119 if (i->openmax) {
120 i->max--;
121 i->openmax = 0;
122 }
123 }
124 if (snd_interval_checkempty(i)) {
125 snd_interval_none(i);
126 return -EINVAL;
127 }
128 return changed;
129}
130
131static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
132{
133 struct snd_interval t;
134 t.empty = 0;
135 t.min = t.max = val;
136 t.openmin = t.openmax = 0;
137 t.integer = 1;
138 return snd_interval_refine(i, &t);
139}
140
141/**
142 * snd_pcm_hw_param_value_min
143 * @params: the hw_params instance
144 * @var: parameter to retrieve
145 * @dir: pointer to the direction (-1,0,1) or NULL
146 *
147 * Return the minimum value for field PAR.
148 */
149static unsigned int
150snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
151 snd_pcm_hw_param_t var, int *dir)
152{
153 if (hw_is_mask(var)) {
154 if (dir)
155 *dir = 0;
156 return snd_mask_min(hw_param_mask_c(params, var));
157 }
158 if (hw_is_interval(var)) {
159 const struct snd_interval *i = hw_param_interval_c(params, var);
160 if (dir)
161 *dir = i->openmin;
162 return snd_interval_min(i);
163 }
164 return -EINVAL;
165}
166
167/**
168 * snd_pcm_hw_param_value_max
169 * @params: the hw_params instance
170 * @var: parameter to retrieve
171 * @dir: pointer to the direction (-1,0,1) or NULL
172 *
173 * Return the maximum value for field PAR.
174 */
175static unsigned int
176snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
177 snd_pcm_hw_param_t var, int *dir)
178{
179 if (hw_is_mask(var)) {
180 if (dir)
181 *dir = 0;
182 return snd_mask_max(hw_param_mask_c(params, var));
183 }
184 if (hw_is_interval(var)) {
185 const struct snd_interval *i = hw_param_interval_c(params, var);
186 if (dir)
187 *dir = - (int) i->openmax;
188 return snd_interval_max(i);
189 }
190 return -EINVAL;
191}
192
193static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
194 snd_pcm_hw_param_t var,
195 const struct snd_mask *val)
196{
197 int changed;
198 changed = snd_mask_refine(hw_param_mask(params, var), val);
199 if (changed) {
200 params->cmask |= 1 << var;
201 params->rmask |= 1 << var;
202 }
203 return changed;
204}
205
206static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
207 struct snd_pcm_hw_params *params,
208 snd_pcm_hw_param_t var,
209 const struct snd_mask *val)
210{
211 int changed = _snd_pcm_hw_param_mask(params, var, val);
212 if (changed < 0)
213 return changed;
214 if (params->rmask) {
215 int err = snd_pcm_hw_refine(pcm, params);
216 if (err < 0)
217 return err;
218 }
219 return 0;
220}
221
222static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
223 snd_pcm_hw_param_t var, unsigned int val,
224 int dir)
225{
226 int changed;
227 int open = 0;
228 if (dir) {
229 if (dir > 0) {
230 open = 1;
231 } else if (dir < 0) {
232 if (val > 0) {
233 open = 1;
234 val--;
235 }
236 }
237 }
238 if (hw_is_mask(var))
239 changed = snd_mask_refine_min(hw_param_mask(params, var),
240 val + !!open);
241 else if (hw_is_interval(var))
242 changed = snd_interval_refine_min(hw_param_interval(params, var),
243 val, open);
244 else
245 return -EINVAL;
246 if (changed) {
247 params->cmask |= 1 << var;
248 params->rmask |= 1 << var;
249 }
250 return changed;
251}
252
253/**
254 * snd_pcm_hw_param_min
255 * @pcm: PCM instance
256 * @params: the hw_params instance
257 * @var: parameter to retrieve
258 * @val: minimal value
259 * @dir: pointer to the direction (-1,0,1) or NULL
260 *
261 * Inside configuration space defined by PARAMS remove from PAR all
262 * values < VAL. Reduce configuration space accordingly.
263 * Return new minimum or -EINVAL if the configuration space is empty
264 */
265static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
266 struct snd_pcm_hw_params *params,
267 snd_pcm_hw_param_t var, unsigned int val,
268 int *dir)
269{
270 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
271 if (changed < 0)
272 return changed;
273 if (params->rmask) {
274 int err = snd_pcm_hw_refine(pcm, params);
275 if (err < 0)
276 return err;
277 }
278 return snd_pcm_hw_param_value_min(params, var, dir);
279}
280
281static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
282 snd_pcm_hw_param_t var, unsigned int val,
283 int dir)
284{
285 int changed;
286 int open = 0;
287 if (dir) {
288 if (dir < 0) {
289 open = 1;
290 } else if (dir > 0) {
291 open = 1;
292 val++;
293 }
294 }
295 if (hw_is_mask(var)) {
296 if (val == 0 && open) {
297 snd_mask_none(hw_param_mask(params, var));
298 changed = -EINVAL;
299 } else
300 changed = snd_mask_refine_max(hw_param_mask(params, var),
301 val - !!open);
302 } else if (hw_is_interval(var))
303 changed = snd_interval_refine_max(hw_param_interval(params, var),
304 val, open);
305 else
306 return -EINVAL;
307 if (changed) {
308 params->cmask |= 1 << var;
309 params->rmask |= 1 << var;
310 }
311 return changed;
312}
313
314/**
315 * snd_pcm_hw_param_max
316 * @pcm: PCM instance
317 * @params: the hw_params instance
318 * @var: parameter to retrieve
319 * @val: maximal value
320 * @dir: pointer to the direction (-1,0,1) or NULL
321 *
322 * Inside configuration space defined by PARAMS remove from PAR all
323 * values >= VAL + 1. Reduce configuration space accordingly.
324 * Return new maximum or -EINVAL if the configuration space is empty
325 */
326static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
327 struct snd_pcm_hw_params *params,
328 snd_pcm_hw_param_t var, unsigned int val,
329 int *dir)
330{
331 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
332 if (changed < 0)
333 return changed;
334 if (params->rmask) {
335 int err = snd_pcm_hw_refine(pcm, params);
336 if (err < 0)
337 return err;
338 }
339 return snd_pcm_hw_param_value_max(params, var, dir);
340}
341
342static int boundary_sub(int a, int adir,
343 int b, int bdir,
344 int *c, int *cdir)
345{
346 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
347 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
348 *c = a - b;
349 *cdir = adir - bdir;
350 if (*cdir == -2) {
351 (*c)--;
352 } else if (*cdir == 2) {
353 (*c)++;
354 }
355 return 0;
356}
357
358static int boundary_lt(unsigned int a, int adir,
359 unsigned int b, int bdir)
360{
361 if (adir < 0) {
362 a--;
363 adir = 1;
364 } else if (adir > 0)
365 adir = 1;
366 if (bdir < 0) {
367 b--;
368 bdir = 1;
369 } else if (bdir > 0)
370 bdir = 1;
371 return a < b || (a == b && adir < bdir);
372}
373
374/* Return 1 if min is nearer to best than max */
375static int boundary_nearer(int min, int mindir,
376 int best, int bestdir,
377 int max, int maxdir)
378{
379 int dmin, dmindir;
380 int dmax, dmaxdir;
381 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
382 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
383 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
384}
385
386/**
387 * snd_pcm_hw_param_near
388 * @pcm: PCM instance
389 * @params: the hw_params instance
390 * @var: parameter to retrieve
391 * @best: value to set
392 * @dir: pointer to the direction (-1,0,1) or NULL
393 *
394 * Inside configuration space defined by PARAMS set PAR to the available value
395 * nearest to VAL. Reduce configuration space accordingly.
396 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
397 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
398 * Return the value found.
399 */
400static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
401 struct snd_pcm_hw_params *params,
402 snd_pcm_hw_param_t var, unsigned int best,
403 int *dir)
404{
405 struct snd_pcm_hw_params *save = NULL;
406 int v;
407 unsigned int saved_min;
408 int last = 0;
409 int min, max;
410 int mindir, maxdir;
411 int valdir = dir ? *dir : 0;
412 /* FIXME */
413 if (best > INT_MAX)
414 best = INT_MAX;
415 min = max = best;
416 mindir = maxdir = valdir;
417 if (maxdir > 0)
418 maxdir = 0;
419 else if (maxdir == 0)
420 maxdir = -1;
421 else {
422 maxdir = 1;
423 max--;
424 }
425 save = kmalloc(sizeof(*save), GFP_KERNEL);
426 if (save == NULL)
427 return -ENOMEM;
428 *save = *params;
429 saved_min = min;
430 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
431 if (min >= 0) {
432 struct snd_pcm_hw_params *params1;
433 if (max < 0)
434 goto _end;
435 if ((unsigned int)min == saved_min && mindir == valdir)
436 goto _end;
437 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
438 if (params1 == NULL) {
439 kfree(save);
440 return -ENOMEM;
441 }
442 *params1 = *save;
443 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
444 if (max < 0) {
445 kfree(params1);
446 goto _end;
447 }
448 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
449 *params = *params1;
450 last = 1;
451 }
452 kfree(params1);
453 } else {
454 *params = *save;
455 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
7eaa943c
TI		 456 if (max < 0)
457 return max;
e88e8ae6
TI		 458 last = 1;
459 }
460 _end:
461 kfree(save);
462 if (last)
463 v = snd_pcm_hw_param_last(pcm, params, var, dir);
464 else
465 v = snd_pcm_hw_param_first(pcm, params, var, dir);
7eaa943c 466 snd_BUG_ON(v < 0);
e88e8ae6
TI		 467 return v;
468}
469
470static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
471 snd_pcm_hw_param_t var, unsigned int val,
472 int dir)
473{
474 int changed;
475 if (hw_is_mask(var)) {
476 struct snd_mask *m = hw_param_mask(params, var);
477 if (val == 0 && dir < 0) {
478 changed = -EINVAL;
479 snd_mask_none(m);
480 } else {
481 if (dir > 0)
482 val++;
483 else if (dir < 0)
484 val--;
485 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
486 }
487 } else if (hw_is_interval(var)) {
488 struct snd_interval *i = hw_param_interval(params, var);
489 if (val == 0 && dir < 0) {
490 changed = -EINVAL;
491 snd_interval_none(i);
492 } else if (dir == 0)
493 changed = snd_interval_refine_set(i, val);
494 else {
495 struct snd_interval t;
496 t.openmin = 1;
497 t.openmax = 1;
498 t.empty = 0;
499 t.integer = 0;
500 if (dir < 0) {
501 t.min = val - 1;
502 t.max = val;
503 } else {
504 t.min = val;
505 t.max = val+1;
506 }
507 changed = snd_interval_refine(i, &t);
508 }
509 } else
510 return -EINVAL;
511 if (changed) {
512 params->cmask |= 1 << var;
513 params->rmask |= 1 << var;
514 }
515 return changed;
516}
517
518/**
519 * snd_pcm_hw_param_set
520 * @pcm: PCM instance
521 * @params: the hw_params instance
522 * @var: parameter to retrieve
523 * @val: value to set
524 * @dir: pointer to the direction (-1,0,1) or NULL
525 *
526 * Inside configuration space defined by PARAMS remove from PAR all
527 * values != VAL. Reduce configuration space accordingly.
528 * Return VAL or -EINVAL if the configuration space is empty
529 */
530static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
531 struct snd_pcm_hw_params *params,
532 snd_pcm_hw_param_t var, unsigned int val,
533 int dir)
534{
535 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
536 if (changed < 0)
537 return changed;
538 if (params->rmask) {
539 int err = snd_pcm_hw_refine(pcm, params);
540 if (err < 0)
541 return err;
542 }
543 return snd_pcm_hw_param_value(params, var, NULL);
544}
545
546static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
547 snd_pcm_hw_param_t var)
548{
549 int changed;
550 changed = snd_interval_setinteger(hw_param_interval(params, var));
551 if (changed) {
552 params->cmask |= 1 << var;
553 params->rmask |= 1 << var;
554 }
555 return changed;
556}
557
558/*
559 * plugin
560 */
561
21a3479a 562#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 563static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 564{
6ac77bc1
TI		 565 struct snd_pcm_runtime *runtime = substream->runtime;
566 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 567
568 plugin = runtime->oss.plugin_first;
569 while (plugin) {
570 next = plugin->next;
571 snd_pcm_plugin_free(plugin);
572 plugin = next;
573 }
574 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
575 return 0;
576}
577
6ac77bc1 578static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 579{
6ac77bc1 580 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 581 plugin->next = runtime->oss.plugin_first;
582 plugin->prev = NULL;
583 if (runtime->oss.plugin_first) {
584 runtime->oss.plugin_first->prev = plugin;
585 runtime->oss.plugin_first = plugin;
586 } else {
587 runtime->oss.plugin_last =
588 runtime->oss.plugin_first = plugin;
589 }
590 return 0;
591}
592
6ac77bc1 593int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 594{
6ac77bc1 595 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 596 plugin->next = NULL;
597 plugin->prev = runtime->oss.plugin_last;
598 if (runtime->oss.plugin_last) {
599 runtime->oss.plugin_last->next = plugin;
600 runtime->oss.plugin_last = plugin;
601 } else {
602 runtime->oss.plugin_last =
603 runtime->oss.plugin_first = plugin;
604 }
605 return 0;
606}
21a3479a 607#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 608
6ac77bc1 609static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 610{
6ac77bc1 611 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 612 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 613 long bytes = frames_to_bytes(runtime, frames);
1da177e4 614 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 615 return bytes;
cdc5c53f
TI		 616#if BITS_PER_LONG >= 64
617 return runtime->oss.buffer_bytes * bytes / buffer_size;
618#else
619 {
620 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
3f7440a6 621 return div_u64(bsize, buffer_size);
cdc5c53f
TI		 622 }
623#endif
1da177e4
LT		 624}
625
6ac77bc1 626static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 627{
6ac77bc1 628 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 629 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 630 if (buffer_size == runtime->oss.buffer_bytes)
631 return bytes_to_frames(runtime, bytes);
632 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
633}
634
f240406b
JK		 635static inline
636snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
637{
e7636925 638 return runtime->hw_ptr_interrupt;
f240406b
JK		 639}
640
24038a25
TI		 641/* define extended formats in the recent OSS versions (if any) */
642/* linear formats */
643#define AFMT_S32_LE 0x00001000
644#define AFMT_S32_BE 0x00002000
645#define AFMT_S24_LE 0x00008000
646#define AFMT_S24_BE 0x00010000
647#define AFMT_S24_PACKED 0x00040000
648
649/* other supported formats */
650#define AFMT_FLOAT 0x00004000
651#define AFMT_SPDIF_RAW 0x00020000
652
653/* unsupported formats */
654#define AFMT_AC3 0x00000400
655#define AFMT_VORBIS 0x00000800
656
1da177e4
LT		 657static int snd_pcm_oss_format_from(int format)
658{
659 switch (format) {
660 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
661 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
662 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
663 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
664 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
665 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
666 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
667 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
668 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
669 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
24038a25
TI		 670 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
671 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
672 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
673 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
674 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
675 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
676 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
1da177e4
LT		 677 default: return SNDRV_PCM_FORMAT_U8;
678 }
679}
680
681static int snd_pcm_oss_format_to(int format)
682{
683 switch (format) {
684 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
685 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
686 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
687 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
688 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
689 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
690 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
691 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
692 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
693 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
24038a25
TI		 694 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
695 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
696 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
697 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
698 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
699 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
700 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
1da177e4
LT		 701 default: return -EINVAL;
702 }
703}
704
6ac77bc1
TI		 705static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
706 struct snd_pcm_hw_params *oss_params,
707 struct snd_pcm_hw_params *slave_params)
1da177e4
LT		 708{
709 size_t s;
710 size_t oss_buffer_size, oss_period_size, oss_periods;
711 size_t min_period_size, max_period_size;
6ac77bc1 712 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 713 size_t oss_frame_size;
714
715 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
716 params_channels(oss_params) / 8;
717
718 oss_buffer_size = snd_pcm_plug_client_size(substream,
719 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
720 oss_buffer_size = 1 << ld2(oss_buffer_size);
9c323fcb 721 if (atomic_read(&substream->mmap_count)) {
1da177e4
LT		 722 if (oss_buffer_size > runtime->oss.mmap_bytes)
723 oss_buffer_size = runtime->oss.mmap_bytes;
724 }
725
060d77b9
TI		 726 if (substream->oss.setup.period_size > 16)
727 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 728 else if (runtime->oss.fragshift) {
729 oss_period_size = 1 << runtime->oss.fragshift;
730 if (oss_period_size > oss_buffer_size / 2)
731 oss_period_size = oss_buffer_size / 2;
732 } else {
733 int sd;
734 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
735
736 oss_period_size = oss_buffer_size;
737 do {
738 oss_period_size /= 2;
739 } while (oss_period_size > bytes_per_sec);
740 if (runtime->oss.subdivision == 0) {
741 sd = 4;
742 if (oss_period_size / sd > 4096)
743 sd *= 2;
744 if (oss_period_size / sd < 4096)
745 sd = 1;
746 } else
747 sd = runtime->oss.subdivision;
748 oss_period_size /= sd;
749 if (oss_period_size < 16)
750 oss_period_size = 16;
751 }
752
753 min_period_size = snd_pcm_plug_client_size(substream,
754 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
755 min_period_size *= oss_frame_size;
756 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
757 if (oss_period_size < min_period_size)
758 oss_period_size = min_period_size;
759
760 max_period_size = snd_pcm_plug_client_size(substream,
761 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
762 max_period_size *= oss_frame_size;
763 max_period_size = 1 << ld2(max_period_size);
764 if (oss_period_size > max_period_size)
765 oss_period_size = max_period_size;
766
767 oss_periods = oss_buffer_size / oss_period_size;
768
060d77b9
TI		 769 if (substream->oss.setup.periods > 1)
770 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 771
772 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
773 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
774 s = runtime->oss.maxfrags;
775 if (oss_periods > s)
776 oss_periods = s;
777
778 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
779 if (s < 2)
780 s = 2;
781 if (oss_periods < s)
782 oss_periods = s;
783
784 while (oss_period_size * oss_periods > oss_buffer_size)
785 oss_period_size /= 2;
786
7eaa943c
TI		 787 if (oss_period_size < 16)
788 return -EINVAL;
1da177e4
LT		 789 runtime->oss.period_bytes = oss_period_size;
790 runtime->oss.period_frames = 1;
791 runtime->oss.periods = oss_periods;
792 return 0;
793}
794
6ac77bc1
TI		 795static int choose_rate(struct snd_pcm_substream *substream,
796 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 797{
6ac77bc1
TI		 798 struct snd_interval *it;
799 struct snd_pcm_hw_params *save;
1da177e4
LT		 800 unsigned int rate, prev;
801
802 save = kmalloc(sizeof(*save), GFP_KERNEL);
803 if (save == NULL)
804 return -ENOMEM;
805 *save = *params;
806 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
807
808 /* try multiples of the best rate */
809 rate = best_rate;
810 for (;;) {
811 if (it->max < rate || (it->max == rate && it->openmax))
812 break;
813 if (it->min < rate || (it->min == rate && !it->openmin)) {
814 int ret;
815 ret = snd_pcm_hw_param_set(substream, params,
816 SNDRV_PCM_HW_PARAM_RATE,
817 rate, 0);
818 if (ret == (int)rate) {
819 kfree(save);
820 return rate;
821 }
822 *params = *save;
823 }
824 prev = rate;
825 rate += best_rate;
826 if (rate <= prev)
827 break;
828 }
829
830 /* not found, use the nearest rate */
831 kfree(save);
832 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
833}
834
6ac77bc1 835static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
1da177e4 836{
6ac77bc1
TI		 837 struct snd_pcm_runtime *runtime = substream->runtime;
838 struct snd_pcm_hw_params *params, *sparams;
839 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 840 ssize_t oss_buffer_size, oss_period_size;
841 size_t oss_frame_size;
842 int err;
843 int direct;
844 int format, sformat, n;
6ac77bc1
TI		 845 struct snd_mask sformat_mask;
846 struct snd_mask mask;
1da177e4 847
e3a5d59a
TI		 848 if (mutex_lock_interruptible(&runtime->oss.params_lock))
849 return -EINTR;
1da177e4
LT		 850 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
851 params = kmalloc(sizeof(*params), GFP_KERNEL);
852 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
853 if (!sw_params || !params || !sparams) {
854 snd_printd("No memory\n");
855 err = -ENOMEM;
856 goto failure;
857 }
858
9c323fcb 859 if (atomic_read(&substream->mmap_count))
1da177e4 860 direct = 1;
060d77b9
TI		 861 else
862 direct = substream->oss.setup.direct;
1da177e4
LT		 863
864 _snd_pcm_hw_params_any(sparams);
865 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
866 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
867 snd_mask_none(&mask);
9c323fcb 868 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 869 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
870 else {
871 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
872 if (!direct)
873 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
874 }
875 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
876 if (err < 0) {
877 snd_printd("No usable accesses\n");
878 err = -EINVAL;
879 goto failure;
880 }
881 choose_rate(substream, sparams, runtime->oss.rate);
882 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
883
884 format = snd_pcm_oss_format_from(runtime->oss.format);
885
886 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
887 if (direct)
888 sformat = format;
889 else
890 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
891
892 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
893 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
894 if (snd_mask_test(&sformat_mask, sformat) &&
895 snd_pcm_oss_format_to(sformat) >= 0)
896 break;
897 }
898 if (sformat > SNDRV_PCM_FORMAT_LAST) {
899 snd_printd("Cannot find a format!!!\n");
900 err = -EINVAL;
901 goto failure;
902 }
903 }
904 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
7eaa943c
TI		 905 if (err < 0)
906 goto failure;
1da177e4
LT		 907
908 if (direct) {
909 memcpy(params, sparams, sizeof(*params));
910 } else {
911 _snd_pcm_hw_params_any(params);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
913 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
914 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
915 snd_pcm_oss_format_from(runtime->oss.format), 0);
916 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
917 runtime->oss.channels, 0);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
919 runtime->oss.rate, 0);
920 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
921 params_access(params), params_format(params),
922 params_channels(params), params_rate(params));
923 }
924 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
925 params_access(sparams), params_format(sparams),
926 params_channels(sparams), params_rate(sparams));
927
928 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
929 params_channels(params) / 8;
930
21a3479a 931#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 932 snd_pcm_oss_plugin_clear(substream);
933 if (!direct) {
934 /* add necessary plugins */
935 snd_pcm_oss_plugin_clear(substream);
936 if ((err = snd_pcm_plug_format_plugins(substream,
937 params,
938 sparams)) < 0) {
939 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
940 snd_pcm_oss_plugin_clear(substream);
941 goto failure;
942 }
943 if (runtime->oss.plugin_first) {
6ac77bc1 944 struct snd_pcm_plugin *plugin;
1da177e4
LT		 945 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
946 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
947 snd_pcm_oss_plugin_clear(substream);
948 goto failure;
949 }
950 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
951 err = snd_pcm_plugin_append(plugin);
952 } else {
953 err = snd_pcm_plugin_insert(plugin);
954 }
955 if (err < 0) {
956 snd_pcm_oss_plugin_clear(substream);
957 goto failure;
958 }
959 }
960 }
21a3479a 961#endif
1da177e4
LT		 962
963 err = snd_pcm_oss_period_size(substream, params, sparams);
964 if (err < 0)
965 goto failure;
966
967 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
968 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
7eaa943c
TI		 969 if (err < 0)
970 goto failure;
1da177e4
LT		 971
972 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
973 runtime->oss.periods, NULL);
7eaa943c
TI		 974 if (err < 0)
975 goto failure;
1da177e4
LT		 976
977 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
978
979 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
980 snd_printd("HW_PARAMS failed: %i\n", err);
981 goto failure;
982 }
983
984 memset(sw_params, 0, sizeof(*sw_params));
985 if (runtime->oss.trigger) {
986 sw_params->start_threshold = 1;
987 } else {
988 sw_params->start_threshold = runtime->boundary;
989 }
9c323fcb
TI		 990 if (atomic_read(&substream->mmap_count) ||
991 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 992 sw_params->stop_threshold = runtime->boundary;
993 else
994 sw_params->stop_threshold = runtime->buffer_size;
995 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
996 sw_params->period_step = 1;
004e6538
TI		 997 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
998 1 : runtime->period_size;
9c323fcb 999 if (atomic_read(&substream->mmap_count) ||
060d77b9 1000 substream->oss.setup.nosilence) {
1da177e4
LT		 1001 sw_params->silence_threshold = 0;
1002 sw_params->silence_size = 0;
1003 } else {
1004 snd_pcm_uframes_t frames;
1005 frames = runtime->period_size + 16;
1006 if (frames > runtime->buffer_size)
1007 frames = runtime->buffer_size;
1008 sw_params->silence_threshold = frames;
1009 sw_params->silence_size = frames;
1010 }
1011
1012 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1013 snd_printd("SW_PARAMS failed: %i\n", err);
1014 goto failure;
1015 }
1016
1017 runtime->oss.periods = params_periods(sparams);
1018 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
7eaa943c
TI		 1019 if (oss_period_size < 0) {
1020 err = -EINVAL;
1021 goto failure;
1022 }
21a3479a 1023#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1024 if (runtime->oss.plugin_first) {
1025 err = snd_pcm_plug_alloc(substream, oss_period_size);
1026 if (err < 0)
1027 goto failure;
1028 }
21a3479a 1029#endif
1da177e4
LT		 1030 oss_period_size *= oss_frame_size;
1031
1032 oss_buffer_size = oss_period_size * runtime->oss.periods;
7eaa943c
TI		 1033 if (oss_buffer_size < 0) {
1034 err = -EINVAL;
1035 goto failure;
1036 }
1da177e4
LT		 1037
1038 runtime->oss.period_bytes = oss_period_size;
1039 runtime->oss.buffer_bytes = oss_buffer_size;
1040
1041 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1042 runtime->oss.period_bytes,
1043 runtime->oss.buffer_bytes);
1044 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1045 params_period_size(sparams),
1046 params_buffer_size(sparams));
1047
1048 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1049 runtime->oss.channels = params_channels(params);
1050 runtime->oss.rate = params_rate(params);
1051
1da177e4
LT		 1052 vfree(runtime->oss.buffer);
1053 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
cbbb0570
RK		 1054 if (!runtime->oss.buffer) {
1055 err = -ENOMEM;
1056 goto failure;
1057 }
1058
1059 runtime->oss.params = 0;
1060 runtime->oss.prepare = 1;
1da177e4
LT		 1061 runtime->oss.buffer_used = 0;
1062 if (runtime->dma_area)
1063 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1064
1065 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1066
1067 err = 0;
1068failure:
1069 kfree(sw_params);
1070 kfree(params);
1071 kfree(sparams);
e3a5d59a 1072 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1073 return err;
1074}
1075
6ac77bc1 1076static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1077{
1078 int idx, err;
6ac77bc1 1079 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 1080
1081 for (idx = 0; idx < 2; idx++) {
1082 substream = pcm_oss_file->streams[idx];
1083 if (substream == NULL)
1084 continue;
1085 if (asubstream == NULL)
1086 asubstream = substream;
1087 if (substream->runtime->oss.params) {
1088 err = snd_pcm_oss_change_params(substream);
1089 if (err < 0)
1090 return err;
1091 }
1092 }
7eaa943c
TI		 1093 if (!asubstream)
1094 return -EIO;
1da177e4
LT		 1095 if (r_substream)
1096 *r_substream = asubstream;
1097 return 0;
1098}
1099
6ac77bc1 1100static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1101{
1102 int err;
6ac77bc1 1103 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1104
1105 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1106 if (err < 0) {
1107 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1108 return err;
1109 }
1110 runtime->oss.prepare = 0;
f240406b 1111 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1112 runtime->oss.period_ptr = 0;
1113 runtime->oss.buffer_used = 0;
1114
1115 return 0;
1116}
1117
6ac77bc1 1118static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1119{
6ac77bc1 1120 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1121 int err;
1122
1123 if (substream == NULL)
1124 return 0;
1125 runtime = substream->runtime;
1126 if (runtime->oss.params) {
1127 err = snd_pcm_oss_change_params(substream);
1128 if (err < 0)
1129 return err;
1130 }
1131 if (runtime->oss.prepare) {
1132 err = snd_pcm_oss_prepare(substream);
1133 if (err < 0)
1134 return err;
1135 }
1136 return 0;
1137}
1138
6ac77bc1 1139static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1140{
6ac77bc1 1141 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1142 snd_pcm_uframes_t frames;
1143 int err = 0;
1144
1145 while (1) {
1146 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1147 if (err < 0)
1148 break;
1149 runtime = substream->runtime;
1150 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1151 break;
1152 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1153 /* until avail(delay) <= buffer_size */
1154 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1155 frames /= runtime->period_size;
1156 frames *= runtime->period_size;
1157 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1158 if (err < 0)
1159 break;
1160 }
1161 return err;
1162}
1163
6ac77bc1 1164snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1165{
6ac77bc1 1166 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1167 int ret;
1168 while (1) {
1169 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1170 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1171#ifdef OSS_DEBUG
1172 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1173 printk(KERN_DEBUG "pcm_oss: write: "
1174 "recovering from XRUN\n");
1da177e4 1175 else
006de267
TI		 1176 printk(KERN_DEBUG "pcm_oss: write: "
1177 "recovering from SUSPEND\n");
1da177e4
LT		 1178#endif
1179 ret = snd_pcm_oss_prepare(substream);
1180 if (ret < 0)
1181 break;
1182 }
1183 if (in_kernel) {
1184 mm_segment_t fs;
1185 fs = snd_enter_user();
1186 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1187 snd_leave_user(fs);
1188 } else {
1189 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
1190 }
1191 if (ret != -EPIPE && ret != -ESTRPIPE)
1192 break;
1193 /* test, if we can't store new data, because the stream */
1194 /* has not been started */
1195 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1196 return -EAGAIN;
1197 }
1198 return ret;
1199}
1200
6ac77bc1 1201snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1202{
6ac77bc1 1203 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1204 snd_pcm_sframes_t delay;
1205 int ret;
1206 while (1) {
1207 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1208 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1209#ifdef OSS_DEBUG
1210 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1211 printk(KERN_DEBUG "pcm_oss: read: "
1212 "recovering from XRUN\n");
1da177e4 1213 else
006de267
TI		 1214 printk(KERN_DEBUG "pcm_oss: read: "
1215 "recovering from SUSPEND\n");
1da177e4
LT		 1216#endif
1217 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1218 if (ret < 0)
1219 break;
1220 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1221 ret = snd_pcm_oss_prepare(substream);
1222 if (ret < 0)
1223 break;
1224 }
1225 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1226 if (ret < 0)
1227 break;
1228 if (in_kernel) {
1229 mm_segment_t fs;
1230 fs = snd_enter_user();
1231 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1232 snd_leave_user(fs);
1233 } else {
1234 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
1235 }
1236 if (ret == -EPIPE) {
1237 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1238 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1239 if (ret < 0)
1240 break;
1241 }
1242 continue;
1243 }
1244 if (ret != -ESTRPIPE)
1245 break;
1246 }
1247 return ret;
1248}
1249
6ac77bc1 1250snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1251{
6ac77bc1 1252 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1253 int ret;
1254 while (1) {
1255 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1256 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1257#ifdef OSS_DEBUG
1258 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1259 printk(KERN_DEBUG "pcm_oss: writev: "
1260 "recovering from XRUN\n");
1da177e4 1261 else
006de267
TI		 1262 printk(KERN_DEBUG "pcm_oss: writev: "
1263 "recovering from SUSPEND\n");
1da177e4
LT		 1264#endif
1265 ret = snd_pcm_oss_prepare(substream);
1266 if (ret < 0)
1267 break;
1268 }
1269 if (in_kernel) {
1270 mm_segment_t fs;
1271 fs = snd_enter_user();
1272 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1273 snd_leave_user(fs);
1274 } else {
1275 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1276 }
1277 if (ret != -EPIPE && ret != -ESTRPIPE)
1278 break;
1279
1280 /* test, if we can't store new data, because the stream */
1281 /* has not been started */
1282 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1283 return -EAGAIN;
1284 }
1285 return ret;
1286}
1287
6ac77bc1 1288snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1289{
6ac77bc1 1290 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1291 int ret;
1292 while (1) {
1293 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1294 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1295#ifdef OSS_DEBUG
1296 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1297 printk(KERN_DEBUG "pcm_oss: readv: "
1298 "recovering from XRUN\n");
1da177e4 1299 else
006de267
TI		 1300 printk(KERN_DEBUG "pcm_oss: readv: "
1301 "recovering from SUSPEND\n");
1da177e4
LT		 1302#endif
1303 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1304 if (ret < 0)
1305 break;
1306 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1307 ret = snd_pcm_oss_prepare(substream);
1308 if (ret < 0)
1309 break;
1310 }
1311 if (in_kernel) {
1312 mm_segment_t fs;
1313 fs = snd_enter_user();
1314 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1315 snd_leave_user(fs);
1316 } else {
1317 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1318 }
1319 if (ret != -EPIPE && ret != -ESTRPIPE)
1320 break;
1321 }
1322 return ret;
1323}
1324
6ac77bc1 1325static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1326{
6ac77bc1 1327 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1328 snd_pcm_sframes_t frames, frames1;
21a3479a 1329#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1330 if (runtime->oss.plugin_first) {
6ac77bc1 1331 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1332 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1333 if (!in_kernel) {
1334 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
1335 return -EFAULT;
1336 buf = runtime->oss.buffer;
1337 }
1338 frames = bytes / oss_frame_bytes;
1339 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1340 if (frames1 < 0)
1341 return frames1;
1342 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1343 if (frames1 <= 0)
1344 return frames1;
1345 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 1346 } else
1347#endif
1348 {
1da177e4
LT		 1349 frames = bytes_to_frames(runtime, bytes);
1350 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1351 if (frames1 <= 0)
1352 return frames1;
1353 bytes = frames_to_bytes(runtime, frames1);
1354 }
1355 return bytes;
1356}
1357
6ac77bc1 1358static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1359{
1360 size_t xfer = 0;
1361 ssize_t tmp;
6ac77bc1 1362 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1363
9c323fcb 1364 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1365 return -ENXIO;
1366
1367 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1368 return tmp;
e3a5d59a 1369 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1370 while (bytes > 0) {
1371 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1372 tmp = bytes;
1373 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1374 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1375 if (tmp > 0) {
e3a5d59a
TI		 1376 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1377 tmp = -EFAULT;
1378 goto err;
1379 }
1da177e4
LT		 1380 }
1381 runtime->oss.buffer_used += tmp;
1382 buf += tmp;
1383 bytes -= tmp;
1384 xfer += tmp;
060d77b9 1385 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 1386 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1387 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1388 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1389 if (tmp <= 0)
e3a5d59a 1390 goto err;
1da177e4
LT		 1391 runtime->oss.bytes += tmp;
1392 runtime->oss.period_ptr += tmp;
1393 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1394 if (runtime->oss.period_ptr == 0 ||
1395 runtime->oss.period_ptr == runtime->oss.buffer_used)
1396 runtime->oss.buffer_used = 0;
e3a5d59a
TI		 1397 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1398 tmp = -EAGAIN;
1399 goto err;
1400 }
1da177e4
LT		 1401 }
1402 } else {
4d23359b
CL		 1403 tmp = snd_pcm_oss_write2(substream,
1404 (const char __force *)buf,
1405 runtime->oss.period_bytes, 0);
1da177e4 1406 if (tmp <= 0)
e3a5d59a 1407 goto err;
1da177e4
LT		 1408 runtime->oss.bytes += tmp;
1409 buf += tmp;
1410 bytes -= tmp;
1411 xfer += tmp;
0df63e44 1412 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4
LT		 1413 tmp != runtime->oss.period_bytes)
1414 break;
1415 }
1416 }
e3a5d59a 1417 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1418 return xfer;
e3a5d59a
TI		 1419
1420 err:
1421 mutex_unlock(&runtime->oss.params_lock);
1422 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1423}
1424
6ac77bc1 1425static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1426{
6ac77bc1 1427 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1428 snd_pcm_sframes_t frames, frames1;
21a3479a 1429#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1430 char __user *final_dst = (char __user *)buf;
1431 if (runtime->oss.plugin_first) {
6ac77bc1 1432 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1433 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1434 if (!in_kernel)
1435 buf = runtime->oss.buffer;
1436 frames = bytes / oss_frame_bytes;
1437 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1438 if (frames1 < 0)
1439 return frames1;
1440 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1441 if (frames1 <= 0)
1442 return frames1;
1443 bytes = frames1 * oss_frame_bytes;
1444 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1445 return -EFAULT;
21a3479a
JK		 1446 } else
1447#endif
1448 {
1da177e4
LT		 1449 frames = bytes_to_frames(runtime, bytes);
1450 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1451 if (frames1 <= 0)
1452 return frames1;
1453 bytes = frames_to_bytes(runtime, frames1);
1454 }
1455 return bytes;
1456}
1457
6ac77bc1 1458static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1459{
1460 size_t xfer = 0;
1461 ssize_t tmp;
6ac77bc1 1462 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1463
9c323fcb 1464 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1465 return -ENXIO;
1466
1467 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1468 return tmp;
e3a5d59a 1469 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1470 while (bytes > 0) {
1471 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1472 if (runtime->oss.buffer_used == 0) {
1473 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1474 if (tmp <= 0)
e3a5d59a 1475 goto err;
1da177e4
LT		 1476 runtime->oss.bytes += tmp;
1477 runtime->oss.period_ptr = tmp;
1478 runtime->oss.buffer_used = tmp;
1479 }
1480 tmp = bytes;
1481 if ((size_t) tmp > runtime->oss.buffer_used)
1482 tmp = runtime->oss.buffer_used;
e3a5d59a
TI		 1483 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1484 tmp = -EFAULT;
1485 goto err;
1486 }
1da177e4
LT		 1487 buf += tmp;
1488 bytes -= tmp;
1489 xfer += tmp;
1490 runtime->oss.buffer_used -= tmp;
1491 } else {
4d23359b
CL		 1492 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1493 runtime->oss.period_bytes, 0);
1da177e4 1494 if (tmp <= 0)
e3a5d59a 1495 goto err;
1da177e4
LT		 1496 runtime->oss.bytes += tmp;
1497 buf += tmp;
1498 bytes -= tmp;
1499 xfer += tmp;
1500 }
1501 }
e3a5d59a 1502 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1503 return xfer;
e3a5d59a
TI		 1504
1505 err:
1506 mutex_unlock(&runtime->oss.params_lock);
1507 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1508}
1509
6ac77bc1 1510static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1511{
6ac77bc1 1512 struct snd_pcm_substream *substream;
1da177e4
LT		 1513
1514 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1515 if (substream != NULL) {
bf1bbb5a 1516 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1517 substream->runtime->oss.prepare = 1;
1518 }
1519 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1520 if (substream != NULL) {
bf1bbb5a 1521 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1522 substream->runtime->oss.prepare = 1;
1523 }
1524 return 0;
1525}
1526
6ac77bc1 1527static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1528{
6ac77bc1 1529 struct snd_pcm_substream *substream;
1da177e4
LT		 1530 int err;
1531
1532 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1533 if (substream != NULL) {
1534 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1535 return err;
bf1bbb5a 1536 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 1537 }
1538 /* note: all errors from the start action are ignored */
1539 /* OSS apps do not know, how to handle them */
1540 return 0;
1541}
1542
6ac77bc1 1543static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1544{
6ac77bc1 1545 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1546 ssize_t result = 0;
1547 long res;
1548 wait_queue_t wait;
1549
1550 runtime = substream->runtime;
1551 init_waitqueue_entry(&wait, current);
1552 add_wait_queue(&runtime->sleep, &wait);
1553#ifdef OSS_DEBUG
006de267 1554 printk(KERN_DEBUG "sync1: size = %li\n", size);
1da177e4
LT		 1555#endif
1556 while (1) {
1557 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1558 if (result > 0) {
1559 runtime->oss.buffer_used = 0;
1560 result = 0;
1561 break;
1562 }
1563 if (result != 0 && result != -EAGAIN)
1564 break;
1565 result = 0;
1566 set_current_state(TASK_INTERRUPTIBLE);
1567 snd_pcm_stream_lock_irq(substream);
1568 res = runtime->status->state;
1569 snd_pcm_stream_unlock_irq(substream);
1570 if (res != SNDRV_PCM_STATE_RUNNING) {
1571 set_current_state(TASK_RUNNING);
1572 break;
1573 }
1574 res = schedule_timeout(10 * HZ);
1575 if (signal_pending(current)) {
1576 result = -ERESTARTSYS;
1577 break;
1578 }
1579 if (res == 0) {
1580 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1581 result = -EIO;
1582 break;
1583 }
1584 }
1585 remove_wait_queue(&runtime->sleep, &wait);
1586 return result;
1587}
1588
6ac77bc1 1589static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1590{
1591 int err = 0;
1592 unsigned int saved_f_flags;
6ac77bc1
TI		 1593 struct snd_pcm_substream *substream;
1594 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1595 snd_pcm_format_t format;
1596 unsigned long width;
1597 size_t size;
1598
1599 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1600 if (substream != NULL) {
1601 runtime = substream->runtime;
9c323fcb 1602 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1603 goto __direct;
1604 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1605 return err;
1606 format = snd_pcm_oss_format_from(runtime->oss.format);
1607 width = snd_pcm_format_physical_width(format);
e3a5d59a 1608 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1609 if (runtime->oss.buffer_used > 0) {
1610#ifdef OSS_DEBUG
006de267 1611 printk(KERN_DEBUG "sync: buffer_used\n");
1da177e4
LT		 1612#endif
1613 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1614 snd_pcm_format_set_silence(format,
1615 runtime->oss.buffer + runtime->oss.buffer_used,
1616 size);
1617 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
e3a5d59a
TI		 1618 if (err < 0) {
1619 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1620 return err;
e3a5d59a 1621 }
1da177e4
LT		 1622 } else if (runtime->oss.period_ptr > 0) {
1623#ifdef OSS_DEBUG
006de267 1624 printk(KERN_DEBUG "sync: period_ptr\n");
1da177e4
LT		 1625#endif
1626 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1627 snd_pcm_format_set_silence(format,
1628 runtime->oss.buffer,
1629 size * 8 / width);
1630 err = snd_pcm_oss_sync1(substream, size);
e3a5d59a
TI		 1631 if (err < 0) {
1632 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1633 return err;
e3a5d59a 1634 }
1da177e4
LT		 1635 }
1636 /*
1637 * The ALSA's period might be a bit large than OSS one.
1638 * Fill the remain portion of ALSA period with zeros.
1639 */
1640 size = runtime->control->appl_ptr % runtime->period_size;
1641 if (size > 0) {
1642 size = runtime->period_size - size;
1643 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1644 size = (runtime->frame_bits * size) / 8;
1645 while (size > 0) {
1646 mm_segment_t fs;
1647 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1648 size -= size1;
1649 size1 *= 8;
1650 size1 /= runtime->sample_bits;
1651 snd_pcm_format_set_silence(runtime->format,
1652 runtime->oss.buffer,
1653 size1);
4939c660 1654 size1 /= runtime->channels; /* frames */
1da177e4
LT		 1655 fs = snd_enter_user();
1656 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1657 snd_leave_user(fs);
1658 }
1659 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1660 void __user *buffers[runtime->channels];
1661 memset(buffers, 0, runtime->channels * sizeof(void *));
1662 snd_pcm_lib_writev(substream, buffers, size);
1663 }
1664 }
e3a5d59a 1665 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1666 /*
1667 * finish sync: drain the buffer
1668 */
1669 __direct:
0df63e44
TI		 1670 saved_f_flags = substream->f_flags;
1671 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1672 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1673 substream->f_flags = saved_f_flags;
1da177e4
LT		 1674 if (err < 0)
1675 return err;
1676 runtime->oss.prepare = 1;
1677 }
1678
1679 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1680 if (substream != NULL) {
1681 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1682 return err;
1683 runtime = substream->runtime;
bf1bbb5a 1684 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1685 if (err < 0)
1686 return err;
1687 runtime->oss.buffer_used = 0;
1688 runtime->oss.prepare = 1;
1689 }
1690 return 0;
1691}
1692
6ac77bc1 1693static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1694{
1695 int idx;
1696
1697 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1698 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1699 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1700 if (substream == NULL)
1701 continue;
1702 runtime = substream->runtime;
1703 if (rate < 1000)
1704 rate = 1000;
1705 else if (rate > 192000)
1706 rate = 192000;
1707 if (runtime->oss.rate != rate) {
1708 runtime->oss.params = 1;
1709 runtime->oss.rate = rate;
1710 }
1711 }
1712 return snd_pcm_oss_get_rate(pcm_oss_file);
1713}
1714
6ac77bc1 1715static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1716{
6ac77bc1 1717 struct snd_pcm_substream *substream;
1da177e4
LT		 1718 int err;
1719
1720 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1721 return err;
1722 return substream->runtime->oss.rate;
1723}
1724
6ac77bc1 1725static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1726{
1727 int idx;
1728 if (channels < 1)
1729 channels = 1;
1730 if (channels > 128)
1731 return -EINVAL;
1732 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1733 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1734 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1735 if (substream == NULL)
1736 continue;
1737 runtime = substream->runtime;
1738 if (runtime->oss.channels != channels) {
1739 runtime->oss.params = 1;
1740 runtime->oss.channels = channels;
1741 }
1742 }
1743 return snd_pcm_oss_get_channels(pcm_oss_file);
1744}
1745
6ac77bc1 1746static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1747{
6ac77bc1 1748 struct snd_pcm_substream *substream;
1da177e4
LT		 1749 int err;
1750
1751 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1752 return err;
1753 return substream->runtime->oss.channels;
1754}
1755
6ac77bc1 1756static int snd_pcm_oss_get_block_size(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.period_bytes;
1764}
1765
6ac77bc1 1766static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1767{
6ac77bc1 1768 struct snd_pcm_substream *substream;
1da177e4
LT		 1769 int err;
1770 int direct;
6ac77bc1 1771 struct snd_pcm_hw_params *params;
1da177e4 1772 unsigned int formats = 0;
6ac77bc1 1773 struct snd_mask format_mask;
1da177e4
LT		 1774 int fmt;
1775
1776 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1777 return err;
9c323fcb 1778 if (atomic_read(&substream->mmap_count))
1da177e4 1779 direct = 1;
060d77b9
TI		 1780 else
1781 direct = substream->oss.setup.direct;
1da177e4
LT		 1782 if (!direct)
1783 return AFMT_MU_LAW | AFMT_U8 |
1784 AFMT_S16_LE | AFMT_S16_BE |
1785 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1786 AFMT_U16_BE |
1787 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1788 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1789 AFMT_S24_PACKED;
1da177e4
LT		 1790 params = kmalloc(sizeof(*params), GFP_KERNEL);
1791 if (!params)
1792 return -ENOMEM;
1793 _snd_pcm_hw_params_any(params);
1794 err = snd_pcm_hw_refine(substream, params);
1795 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1796 kfree(params);
7eaa943c
TI		 1797 if (err < 0)
1798 return err;
1da177e4
LT		 1799 for (fmt = 0; fmt < 32; ++fmt) {
1800 if (snd_mask_test(&format_mask, fmt)) {
1801 int f = snd_pcm_oss_format_to(fmt);
1802 if (f >= 0)
1803 formats |= f;
1804 }
1805 }
1806 return formats;
1807}
1808
6ac77bc1 1809static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1810{
1811 int formats, idx;
1812
1813 if (format != AFMT_QUERY) {
1814 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1815 if (formats < 0)
1816 return formats;
1da177e4
LT		 1817 if (!(formats & format))
1818 format = AFMT_U8;
1819 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1820 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1821 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1822 if (substream == NULL)
1823 continue;
1824 runtime = substream->runtime;
1825 if (runtime->oss.format != format) {
1826 runtime->oss.params = 1;
1827 runtime->oss.format = format;
1828 }
1829 }
1830 }
1831 return snd_pcm_oss_get_format(pcm_oss_file);
1832}
1833
6ac77bc1 1834static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1835{
6ac77bc1 1836 struct snd_pcm_substream *substream;
1da177e4
LT		 1837 int err;
1838
1839 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1840 return err;
1841 return substream->runtime->oss.format;
1842}
1843
6ac77bc1 1844static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1845{
6ac77bc1 1846 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1847
1848 if (substream == NULL)
1849 return 0;
1850 runtime = substream->runtime;
1851 if (subdivide == 0) {
1852 subdivide = runtime->oss.subdivision;
1853 if (subdivide == 0)
1854 subdivide = 1;
1855 return subdivide;
1856 }
1857 if (runtime->oss.subdivision || runtime->oss.fragshift)
1858 return -EINVAL;
1859 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1860 subdivide != 8 && subdivide != 16)
1861 return -EINVAL;
1862 runtime->oss.subdivision = subdivide;
1863 runtime->oss.params = 1;
1864 return subdivide;
1865}
1866
6ac77bc1 1867static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1868{
1869 int err = -EINVAL, idx;
1870
1871 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1872 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1873 if (substream == NULL)
1874 continue;
1875 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1876 return err;
1877 }
1878 return err;
1879}
1880
6ac77bc1 1881static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1882{
6ac77bc1 1883 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1884
1885 if (substream == NULL)
1886 return 0;
1887 runtime = substream->runtime;
1888 if (runtime->oss.subdivision || runtime->oss.fragshift)
1889 return -EINVAL;
1890 runtime->oss.fragshift = val & 0xffff;
1891 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1892 if (runtime->oss.fragshift < 4) /* < 16 */
1893 runtime->oss.fragshift = 4;
1894 if (runtime->oss.maxfrags < 2)
1895 runtime->oss.maxfrags = 2;
1896 runtime->oss.params = 1;
1897 return 0;
1898}
1899
6ac77bc1 1900static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1901{
1902 int err = -EINVAL, idx;
1903
1904 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1905 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1906 if (substream == NULL)
1907 continue;
1908 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1909 return err;
1910 }
1911 return err;
1912}
1913
1914static int snd_pcm_oss_nonblock(struct file * file)
1915{
db1dd4d3 1916 spin_lock(&file->f_lock);
1da177e4 1917 file->f_flags |= O_NONBLOCK;
db1dd4d3 1918 spin_unlock(&file->f_lock);
1da177e4
LT		 1919 return 0;
1920}
1921
6ac77bc1 1922static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1923{
1924
1925 if (substream == NULL) {
1926 res &= ~DSP_CAP_DUPLEX;
1927 return res;
1928 }
1929#ifdef DSP_CAP_MULTI
1930 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1931 if (substream->pstr->substream_count > 1)
1932 res |= DSP_CAP_MULTI;
1933#endif
1934 /* DSP_CAP_REALTIME is set all times: */
1935 /* all ALSA drivers can return actual pointer in ring buffer */
1936#if defined(DSP_CAP_REALTIME) && 0
1937 {
6ac77bc1 1938 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1939 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1940 res &= ~DSP_CAP_REALTIME;
1941 }
1942#endif
1943 return res;
1944}
1945
6ac77bc1 1946static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1947{
1948 int result, idx;
1949
1950 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1951 for (idx = 0; idx < 2; idx++) {
6ac77bc1 1952 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1953 result = snd_pcm_oss_get_caps1(substream, result);
1954 }
1955 result |= 0x0001; /* revision - same as SB AWE 64 */
1956 return result;
1957}
1958
f240406b
JK		 1959static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1960 snd_pcm_uframes_t hw_ptr)
1da177e4 1961{
6ac77bc1 1962 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1963 snd_pcm_uframes_t appl_ptr;
1964 appl_ptr = hw_ptr + runtime->buffer_size;
1965 appl_ptr %= runtime->boundary;
1966 runtime->control->appl_ptr = appl_ptr;
1967}
1968
6ac77bc1 1969static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 1970{
6ac77bc1
TI		 1971 struct snd_pcm_runtime *runtime;
1972 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 1973 int err, cmd;
1974
1975#ifdef OSS_DEBUG
006de267 1976 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 1977#endif
1978
1979 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1980 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1981
1982 if (psubstream) {
1983 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1984 return err;
1985 }
1986 if (csubstream) {
1987 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1988 return err;
1989 }
1990 if (psubstream) {
1991 runtime = psubstream->runtime;
1992 if (trigger & PCM_ENABLE_OUTPUT) {
1993 if (runtime->oss.trigger)
1994 goto _skip1;
9c323fcb 1995 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 1996 snd_pcm_oss_simulate_fill(psubstream,
1997 get_hw_ptr_period(runtime));
1da177e4
LT		 1998 runtime->oss.trigger = 1;
1999 runtime->start_threshold = 1;
2000 cmd = SNDRV_PCM_IOCTL_START;
2001 } else {
2002 if (!runtime->oss.trigger)
2003 goto _skip1;
2004 runtime->oss.trigger = 0;
2005 runtime->start_threshold = runtime->boundary;
2006 cmd = SNDRV_PCM_IOCTL_DROP;
2007 runtime->oss.prepare = 1;
2008 }
bf1bbb5a 2009 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1da177e4
LT		 2010 if (err < 0)
2011 return err;
2012 }
2013 _skip1:
2014 if (csubstream) {
2015 runtime = csubstream->runtime;
2016 if (trigger & PCM_ENABLE_INPUT) {
2017 if (runtime->oss.trigger)
2018 goto _skip2;
2019 runtime->oss.trigger = 1;
2020 runtime->start_threshold = 1;
2021 cmd = SNDRV_PCM_IOCTL_START;
2022 } else {
2023 if (!runtime->oss.trigger)
2024 goto _skip2;
2025 runtime->oss.trigger = 0;
2026 runtime->start_threshold = runtime->boundary;
2027 cmd = SNDRV_PCM_IOCTL_DROP;
2028 runtime->oss.prepare = 1;
2029 }
bf1bbb5a 2030 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1da177e4
LT		 2031 if (err < 0)
2032 return err;
2033 }
2034 _skip2:
2035 return 0;
2036}
2037
6ac77bc1 2038static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2039{
6ac77bc1 2040 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2041 int result = 0;
2042
2043 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2044 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2045 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2046 result |= PCM_ENABLE_OUTPUT;
2047 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2048 result |= PCM_ENABLE_INPUT;
2049 return result;
2050}
2051
6ac77bc1 2052static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2053{
6ac77bc1
TI		 2054 struct snd_pcm_substream *substream;
2055 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2056 snd_pcm_sframes_t delay;
2057 int err;
2058
2059 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2060 if (substream == NULL)
2061 return -EINVAL;
2062 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2063 return err;
2064 runtime = substream->runtime;
2065 if (runtime->oss.params || runtime->oss.prepare)
2066 return 0;
bf1bbb5a 2067 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 2068 if (err == -EPIPE)
2069 delay = 0; /* hack for broken OSS applications */
2070 else if (err < 0)
2071 return err;
2072 return snd_pcm_oss_bytes(substream, delay);
2073}
2074
6ac77bc1 2075static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2076{
6ac77bc1
TI		 2077 struct snd_pcm_substream *substream;
2078 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2079 snd_pcm_sframes_t delay;
2080 int fixup;
2081 struct count_info info;
2082 int err;
2083
2084 if (_info == NULL)
2085 return -EFAULT;
2086 substream = pcm_oss_file->streams[stream];
2087 if (substream == NULL)
2088 return -EINVAL;
2089 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2090 return err;
2091 runtime = substream->runtime;
2092 if (runtime->oss.params || runtime->oss.prepare) {
2093 memset(&info, 0, sizeof(info));
2094 if (copy_to_user(_info, &info, sizeof(info)))
2095 return -EFAULT;
2096 return 0;
2097 }
2098 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2099 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2100 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2101 err = 0;
2102 delay = 0;
2103 fixup = 0;
2104 } else {
2105 fixup = runtime->oss.buffer_used;
2106 }
2107 } else {
2108 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2109 fixup = -runtime->oss.buffer_used;
2110 }
2111 if (err < 0)
2112 return err;
2113 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
9c323fcb 2114 if (atomic_read(&substream->mmap_count)) {
1da177e4 2115 snd_pcm_sframes_t n;
f240406b
JK		 2116 delay = get_hw_ptr_period(runtime);
2117 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2118 if (n < 0)
2119 n += runtime->boundary;
2120 info.blocks = n / runtime->period_size;
f240406b 2121 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 2122 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2123 snd_pcm_oss_simulate_fill(substream, delay);
2124 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2125 } else {
5ac0fab9 2126 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2127 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2128 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2129 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2130 else
2131 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2132 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2133 } else {
5ac0fab9
JK		 2134 delay += fixup;
2135 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2136 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2137 }
1da177e4
LT		 2138 }
2139 if (copy_to_user(_info, &info, sizeof(info)))
2140 return -EFAULT;
2141 return 0;
2142}
2143
6ac77bc1 2144static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2145{
6ac77bc1
TI		 2146 struct snd_pcm_substream *substream;
2147 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2148 snd_pcm_sframes_t avail;
2149 int fixup;
2150 struct audio_buf_info info;
2151 int err;
2152
2153 if (_info == NULL)
2154 return -EFAULT;
2155 substream = pcm_oss_file->streams[stream];
2156 if (substream == NULL)
2157 return -EINVAL;
2158 runtime = substream->runtime;
2159
2160 if (runtime->oss.params &&
2161 (err = snd_pcm_oss_change_params(substream)) < 0)
2162 return err;
2163
2164 info.fragsize = runtime->oss.period_bytes;
2165 info.fragstotal = runtime->periods;
2166 if (runtime->oss.prepare) {
2167 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2168 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2169 info.fragments = runtime->oss.periods;
2170 } else {
2171 info.bytes = 0;
2172 info.fragments = 0;
2173 }
2174 } else {
2175 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2176 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2177 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2178 avail = runtime->buffer_size;
2179 err = 0;
2180 fixup = 0;
2181 } else {
2182 avail = runtime->buffer_size - avail;
2183 fixup = -runtime->oss.buffer_used;
2184 }
2185 } else {
2186 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2187 fixup = runtime->oss.buffer_used;
2188 }
2189 if (err < 0)
2190 return err;
2191 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2192 info.fragments = info.bytes / runtime->oss.period_bytes;
2193 }
2194
2195#ifdef OSS_DEBUG
006de267
TI		 2196 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2197 "fragstotal = %i, fragsize = %i\n",
2198 info.bytes, info.fragments, info.fragstotal, info.fragsize);
1da177e4
LT		 2199#endif
2200 if (copy_to_user(_info, &info, sizeof(info)))
2201 return -EFAULT;
2202 return 0;
2203}
2204
6ac77bc1 2205static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2206{
2207 // it won't be probably implemented
2208 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2209 return -EINVAL;
2210}
2211
060d77b9 2212static const char *strip_task_path(const char *path)
1da177e4 2213{
060d77b9
TI		 2214 const char *ptr, *ptrl = NULL;
2215 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2216 if (*ptr == '/')
2217 ptrl = ptr + 1;
1da177e4 2218 }
060d77b9
TI		 2219 return ptrl;
2220}
2221
2222static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2223 const char *task_name,
2224 struct snd_pcm_oss_setup *rsetup)
2225{
2226 struct snd_pcm_oss_setup *setup;
2227
2228 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2229 do {
2230 for (setup = pcm->streams[stream].oss.setup_list; setup;
2231 setup = setup->next) {
2232 if (!strcmp(setup->task_name, task_name))
2233 goto out;
1da177e4 2234 }
060d77b9
TI		 2235 } while ((task_name = strip_task_path(task_name)) != NULL);
2236 out:
2237 if (setup)
2238 *rsetup = *setup;
1a60d4c5 2239 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 2240}
2241
3bf75f9b
TI		 2242static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2243{
2244 struct snd_pcm_runtime *runtime;
2245 runtime = substream->runtime;
2246 vfree(runtime->oss.buffer);
2247 runtime->oss.buffer = NULL;
2248#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2249 snd_pcm_oss_plugin_clear(substream);
2250#endif
2251 substream->oss.oss = 0;
2252}
2253
6ac77bc1
TI		 2254static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2255 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2256 int minor)
2257{
6ac77bc1 2258 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2259
2260 substream->oss.oss = 1;
060d77b9 2261 substream->oss.setup = *setup;
3bf75f9b 2262 if (setup->nonblock)
0df63e44 2263 substream->f_flags |= O_NONBLOCK;
1576274d 2264 else if (setup->block)
0df63e44 2265 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2266 runtime = substream->runtime;
2267 runtime->oss.params = 1;
2268 runtime->oss.trigger = 1;
2269 runtime->oss.rate = 8000;
e3a5d59a 2270 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 2271 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2272 case SNDRV_MINOR_OSS_PCM_8:
2273 runtime->oss.format = AFMT_U8;
2274 break;
2275 case SNDRV_MINOR_OSS_PCM_16:
2276 runtime->oss.format = AFMT_S16_LE;
2277 break;
2278 default:
2279 runtime->oss.format = AFMT_MU_LAW;
2280 }
2281 runtime->oss.channels = 1;
2282 runtime->oss.fragshift = 0;
2283 runtime->oss.maxfrags = 0;
2284 runtime->oss.subdivision = 0;
3bf75f9b 2285 substream->pcm_release = snd_pcm_oss_release_substream;
1da177e4
LT		 2286}
2287
6ac77bc1 2288static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2289{
2290 int cidx;
7eaa943c
TI		 2291 if (!pcm_oss_file)
2292 return 0;
1da177e4 2293 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2294 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2295 if (substream)
2296 snd_pcm_release_substream(substream);
1da177e4
LT		 2297 }
2298 kfree(pcm_oss_file);
2299 return 0;
2300}
2301
2302static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2303 struct snd_pcm *pcm,
2304 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2305 int minor,
060d77b9 2306 struct snd_pcm_oss_setup *setup)
1da177e4 2307{
3bf75f9b 2308 int idx, err;
6ac77bc1 2309 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2310 struct snd_pcm_substream *substream;
aeb5d727 2311 fmode_t f_mode = file->f_mode;
1da177e4 2312
7eaa943c
TI		 2313 if (rpcm_oss_file)
2314 *rpcm_oss_file = NULL;
1da177e4 2315
ca2c0966 2316 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 2317 if (pcm_oss_file == NULL)
2318 return -ENOMEM;
2319
2320 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2321 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2322 f_mode = FMODE_WRITE;
3bf75f9b 2323
0df63e44 2324 file->f_flags &= ~O_APPEND;
3bf75f9b 2325 for (idx = 0; idx < 2; idx++) {
060d77b9 2326 if (setup[idx].disable)
3bf75f9b 2327 continue;
6cb53e7e
TI		 2328 if (! pcm->streams[idx].substream_count)
2329 continue; /* no matching substream */
3bf75f9b
TI		 2330 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2331 if (! (f_mode & FMODE_WRITE))
2332 continue;
2333 } else {
2334 if (! (f_mode & FMODE_READ))
2335 continue;
2336 }
2337 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2338 if (err < 0) {
1da177e4
LT		 2339 snd_pcm_oss_release_file(pcm_oss_file);
2340 return err;
2341 }
3bf75f9b
TI		 2342
2343 pcm_oss_file->streams[idx] = substream;
1576274d 2344 substream->file = pcm_oss_file;
060d77b9 2345 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2346 }
2347
bbdc1b7d 2348 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2349 snd_pcm_oss_release_file(pcm_oss_file);
2350 return -EINVAL;
2351 }
1da177e4
LT		 2352
2353 file->private_data = pcm_oss_file;
7eaa943c
TI		 2354 if (rpcm_oss_file)
2355 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2356 return 0;
2357}
2358
2359
93f2e378
TI		 2360static int snd_task_name(struct task_struct *task, char *name, size_t size)
2361{
2362 unsigned int idx;
2363
7eaa943c
TI		 2364 if (snd_BUG_ON(!task || !name || size < 2))
2365 return -EINVAL;
93f2e378
TI		 2366 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2367 name[idx] = task->comm[idx];
2368 name[idx] = '\0';
2369 return 0;
2370}
2371
1da177e4
LT		 2372static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2373{
1da177e4
LT		 2374 int err;
2375 char task_name[32];
6ac77bc1
TI		 2376 struct snd_pcm *pcm;
2377 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2378 struct snd_pcm_oss_setup setup[2];
1da177e4
LT		 2379 int nonblock;
2380 wait_queue_t wait;
2381
02f4865f
TI		 2382 err = nonseekable_open(inode, file);
2383 if (err < 0)
2384 return err;
2385
f87135f5
CL		 2386 pcm = snd_lookup_oss_minor_data(iminor(inode),
2387 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 2388 if (pcm == NULL) {
2389 err = -ENODEV;
2390 goto __error1;
2391 }
2392 err = snd_card_file_add(pcm->card, file);
2393 if (err < 0)
2394 goto __error1;
2395 if (!try_module_get(pcm->card->module)) {
2396 err = -EFAULT;
2397 goto __error2;
2398 }
2399 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2400 err = -EFAULT;
2401 goto __error;
2402 }
1576274d 2403 memset(setup, 0, sizeof(setup));
1da177e4 2404 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2405 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2406 task_name, &setup[0]);
1da177e4 2407 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2408 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2409 task_name, &setup[1]);
1da177e4
LT		 2410
2411 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2412 if (!nonblock)
2413 nonblock = nonblock_open;
2414
2415 init_waitqueue_entry(&wait, current);
2416 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2417 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2418 while (1) {
2419 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2420 iminor(inode), setup);
1da177e4
LT		 2421 if (err >= 0)
2422 break;
2423 if (err == -EAGAIN) {
2424 if (nonblock) {
2425 err = -EBUSY;
2426 break;
2427 }
2428 } else
2429 break;
2430 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2431 mutex_unlock(&pcm->open_mutex);
1da177e4 2432 schedule();
1a60d4c5 2433 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2434 if (signal_pending(current)) {
2435 err = -ERESTARTSYS;
2436 break;
2437 }
2438 }
2439 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2440 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2441 if (err < 0)
2442 goto __error;
2443 return err;
2444
2445 __error:
2446 module_put(pcm->card->module);
2447 __error2:
2448 snd_card_file_remove(pcm->card, file);
2449 __error1:
2450 return err;
2451}
2452
2453static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2454{
6ac77bc1
TI		 2455 struct snd_pcm *pcm;
2456 struct snd_pcm_substream *substream;
2457 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2458
2459 pcm_oss_file = file->private_data;
2460 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2461 if (substream == NULL)
2462 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
7eaa943c
TI		 2463 if (snd_BUG_ON(!substream))
2464 return -ENXIO;
1da177e4 2465 pcm = substream->pcm;
de1b8b93
TI		 2466 if (!pcm->card->shutdown)
2467 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2468 mutex_lock(&pcm->open_mutex);
1da177e4 2469 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2470 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2471 wake_up(&pcm->open_wait);
2472 module_put(pcm->card->module);
2473 snd_card_file_remove(pcm->card, file);
2474 return 0;
2475}
2476
2477static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2478{
6ac77bc1 2479 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2480 int __user *p = (int __user *)arg;
2481 int res;
2482
2483 pcm_oss_file = file->private_data;
2484 if (cmd == OSS_GETVERSION)
2485 return put_user(SNDRV_OSS_VERSION, p);
2486 if (cmd == OSS_ALSAEMULVER)
2487 return put_user(1, p);
2488#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2489 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2490 struct snd_pcm_substream *substream;
1da177e4
LT		 2491 int idx;
2492 for (idx = 0; idx < 2; ++idx) {
2493 substream = pcm_oss_file->streams[idx];
2494 if (substream != NULL)
2495 break;
2496 }
7eaa943c
TI		 2497 if (snd_BUG_ON(idx >= 2))
2498 return -ENXIO;
1da177e4
LT		 2499 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2500 }
2501#endif
2502 if (((cmd >> 8) & 0xff) != 'P')
2503 return -EINVAL;
2504#ifdef OSS_DEBUG
006de267 2505 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 2506#endif
2507 switch (cmd) {
2508 case SNDCTL_DSP_RESET:
2509 return snd_pcm_oss_reset(pcm_oss_file);
2510 case SNDCTL_DSP_SYNC:
2511 return snd_pcm_oss_sync(pcm_oss_file);
2512 case SNDCTL_DSP_SPEED:
2513 if (get_user(res, p))
2514 return -EFAULT;
2515 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2516 return res;
2517 return put_user(res, p);
2518 case SOUND_PCM_READ_RATE:
2519 res = snd_pcm_oss_get_rate(pcm_oss_file);
2520 if (res < 0)
2521 return res;
2522 return put_user(res, p);
2523 case SNDCTL_DSP_STEREO:
2524 if (get_user(res, p))
2525 return -EFAULT;
2526 res = res > 0 ? 2 : 1;
2527 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2528 return res;
2529 return put_user(--res, p);
2530 case SNDCTL_DSP_GETBLKSIZE:
2531 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2532 if (res < 0)
2533 return res;
2534 return put_user(res, p);
2535 case SNDCTL_DSP_SETFMT:
2536 if (get_user(res, p))
2537 return -EFAULT;
2538 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2539 if (res < 0)
2540 return res;
2541 return put_user(res, p);
2542 case SOUND_PCM_READ_BITS:
2543 res = snd_pcm_oss_get_format(pcm_oss_file);
2544 if (res < 0)
2545 return res;
2546 return put_user(res, p);
2547 case SNDCTL_DSP_CHANNELS:
2548 if (get_user(res, p))
2549 return -EFAULT;
2550 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2551 if (res < 0)
2552 return res;
2553 return put_user(res, p);
2554 case SOUND_PCM_READ_CHANNELS:
2555 res = snd_pcm_oss_get_channels(pcm_oss_file);
2556 if (res < 0)
2557 return res;
2558 return put_user(res, p);
2559 case SOUND_PCM_WRITE_FILTER:
2560 case SOUND_PCM_READ_FILTER:
2561 return -EIO;
2562 case SNDCTL_DSP_POST:
2563 return snd_pcm_oss_post(pcm_oss_file);
2564 case SNDCTL_DSP_SUBDIVIDE:
2565 if (get_user(res, p))
2566 return -EFAULT;
2567 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2568 if (res < 0)
2569 return res;
2570 return put_user(res, p);
2571 case SNDCTL_DSP_SETFRAGMENT:
2572 if (get_user(res, p))
2573 return -EFAULT;
2574 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2575 case SNDCTL_DSP_GETFMTS:
2576 res = snd_pcm_oss_get_formats(pcm_oss_file);
2577 if (res < 0)
2578 return res;
2579 return put_user(res, p);
2580 case SNDCTL_DSP_GETOSPACE:
2581 case SNDCTL_DSP_GETISPACE:
2582 return snd_pcm_oss_get_space(pcm_oss_file,
2583 cmd == SNDCTL_DSP_GETISPACE ?
2584 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2585 (struct audio_buf_info __user *) arg);
2586 case SNDCTL_DSP_NONBLOCK:
2587 return snd_pcm_oss_nonblock(file);
2588 case SNDCTL_DSP_GETCAPS:
2589 res = snd_pcm_oss_get_caps(pcm_oss_file);
2590 if (res < 0)
2591 return res;
2592 return put_user(res, p);
2593 case SNDCTL_DSP_GETTRIGGER:
2594 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2595 if (res < 0)
2596 return res;
2597 return put_user(res, p);
2598 case SNDCTL_DSP_SETTRIGGER:
2599 if (get_user(res, p))
2600 return -EFAULT;
2601 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2602 case SNDCTL_DSP_GETIPTR:
2603 case SNDCTL_DSP_GETOPTR:
2604 return snd_pcm_oss_get_ptr(pcm_oss_file,
2605 cmd == SNDCTL_DSP_GETIPTR ?
2606 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2607 (struct count_info __user *) arg);
2608 case SNDCTL_DSP_MAPINBUF:
2609 case SNDCTL_DSP_MAPOUTBUF:
2610 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2611 cmd == SNDCTL_DSP_MAPINBUF ?
2612 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2613 (struct buffmem_desc __user *) arg);
2614 case SNDCTL_DSP_SETSYNCRO:
2615 /* stop DMA now.. */
2616 return 0;
2617 case SNDCTL_DSP_SETDUPLEX:
2618 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2619 return 0;
2620 return -EIO;
2621 case SNDCTL_DSP_GETODELAY:
2622 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2623 if (res < 0) {
2624 /* it's for sure, some broken apps don't check for error codes */
2625 put_user(0, p);
2626 return res;
2627 }
2628 return put_user(res, p);
2629 case SNDCTL_DSP_PROFILE:
2630 return 0; /* silently ignore */
2631 default:
2632 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2633 }
2634 return -EINVAL;
2635}
2636
2637#ifdef CONFIG_COMPAT
2638/* all compatible */
2639#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2640#else
2641#define snd_pcm_oss_ioctl_compat NULL
2642#endif
2643
2644static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2645{
6ac77bc1
TI		 2646 struct snd_pcm_oss_file *pcm_oss_file;
2647 struct snd_pcm_substream *substream;
1da177e4
LT		 2648
2649 pcm_oss_file = file->private_data;
2650 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2651 if (substream == NULL)
2652 return -ENXIO;
0df63e44 2653 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 2654#ifndef OSS_DEBUG
2655 return snd_pcm_oss_read1(substream, buf, count);
2656#else
2657 {
2658 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
006de267
TI		 2659 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2660 "(returned %li bytes)\n", (long)count, (long)res);
1da177e4
LT		 2661 return res;
2662 }
2663#endif
2664}
2665
2666static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2667{
6ac77bc1
TI		 2668 struct snd_pcm_oss_file *pcm_oss_file;
2669 struct snd_pcm_substream *substream;
1da177e4
LT		 2670 long result;
2671
2672 pcm_oss_file = file->private_data;
2673 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2674 if (substream == NULL)
2675 return -ENXIO;
0df63e44 2676 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2677 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2678#ifdef OSS_DEBUG
006de267
TI		 2679 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2680 (long)count, (long)result);
1da177e4
LT		 2681#endif
2682 return result;
2683}
2684
6ac77bc1 2685static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2686{
6ac77bc1 2687 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2688 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2689 return runtime->oss.prev_hw_ptr_period !=
2690 get_hw_ptr_period(runtime);
1da177e4 2691 else
f240406b
JK		 2692 return snd_pcm_playback_avail(runtime) >=
2693 runtime->oss.period_frames;
1da177e4
LT		 2694}
2695
6ac77bc1 2696static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2697{
6ac77bc1 2698 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2699 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2700 return runtime->oss.prev_hw_ptr_period !=
2701 get_hw_ptr_period(runtime);
1da177e4 2702 else
f240406b
JK		 2703 return snd_pcm_capture_avail(runtime) >=
2704 runtime->oss.period_frames;
1da177e4
LT		 2705}
2706
2707static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2708{
6ac77bc1 2709 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4 2710 unsigned int mask;
6ac77bc1 2711 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2712
2713 pcm_oss_file = file->private_data;
2714
2715 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2716 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2717
2718 mask = 0;
2719 if (psubstream != NULL) {
6ac77bc1 2720 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2721 poll_wait(file, &runtime->sleep, wait);
2722 snd_pcm_stream_lock_irq(psubstream);
2723 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2724 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2725 snd_pcm_oss_playback_ready(psubstream)))
2726 mask |= POLLOUT | POLLWRNORM;
2727 snd_pcm_stream_unlock_irq(psubstream);
2728 }
2729 if (csubstream != NULL) {
6ac77bc1
TI		 2730 struct snd_pcm_runtime *runtime = csubstream->runtime;
2731 snd_pcm_state_t ostate;
1da177e4
LT		 2732 poll_wait(file, &runtime->sleep, wait);
2733 snd_pcm_stream_lock_irq(csubstream);
2734 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2735 snd_pcm_oss_capture_ready(csubstream))
2736 mask |= POLLIN | POLLRDNORM;
2737 snd_pcm_stream_unlock_irq(csubstream);
2738 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2739 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2740 memset(&ofile, 0, sizeof(ofile));
2741 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2742 runtime->oss.trigger = 0;
2743 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2744 }
2745 }
2746
2747 return mask;
2748}
2749
2750static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2751{
6ac77bc1
TI		 2752 struct snd_pcm_oss_file *pcm_oss_file;
2753 struct snd_pcm_substream *substream = NULL;
2754 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2755 int err;
2756
2757#ifdef OSS_DEBUG
006de267 2758 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
1da177e4
LT		 2759#endif
2760 pcm_oss_file = file->private_data;
2761 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2762 case VM_READ | VM_WRITE:
2763 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2764 if (substream)
2765 break;
2766 /* Fall through */
2767 case VM_READ:
2768 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2769 break;
2770 case VM_WRITE:
2771 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2772 break;
2773 default:
2774 return -EINVAL;
2775 }
2776 /* set VM_READ access as well to fix memset() routines that do
2777 reads before writes (to improve performance) */
2778 area->vm_flags |= VM_READ;
2779 if (substream == NULL)
2780 return -ENXIO;
2781 runtime = substream->runtime;
2782 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2783 return -EIO;
2784 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2785 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2786 else
2787 return -EIO;
2788
2789 if (runtime->oss.params) {
2790 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2791 return err;
2792 }
21a3479a 2793#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2794 if (runtime->oss.plugin_first != NULL)
2795 return -EIO;
21a3479a 2796#endif
1da177e4
LT		 2797
2798 if (area->vm_pgoff != 0)
2799 return -EINVAL;
2800
2801 err = snd_pcm_mmap_data(substream, file, area);
2802 if (err < 0)
2803 return err;
2804 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2805 runtime->silence_threshold = 0;
2806 runtime->silence_size = 0;
2807#ifdef OSS_DEBUG
006de267
TI		 2808 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2809 runtime->oss.mmap_bytes);
1da177e4
LT		 2810#endif
2811 /* In mmap mode we never stop */
2812 runtime->stop_threshold = runtime->boundary;
2813
2814 return 0;
2815}
2816
b7d90a35 2817#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2818/*
2819 * /proc interface
2820 */
2821
6ac77bc1
TI		 2822static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2823 struct snd_info_buffer *buffer)
1da177e4 2824{
6ac77bc1
TI		 2825 struct snd_pcm_str *pstr = entry->private_data;
2826 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2827 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2828 while (setup) {
2829 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2830 setup->task_name,
2831 setup->periods,
2832 setup->period_size,
2833 setup->disable ? " disable" : "",
2834 setup->direct ? " direct" : "",
2835 setup->block ? " block" : "",
2836 setup->nonblock ? " non-block" : "",
2837 setup->partialfrag ? " partial-frag" : "",
2838 setup->nosilence ? " no-silence" : "");
2839 setup = setup->next;
2840 }
1a60d4c5 2841 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2842}
2843
6ac77bc1 2844static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2845{
6ac77bc1 2846 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2847
1da177e4
LT		 2848 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2849 setup; setup = setupn) {
2850 setupn = setup->next;
2851 kfree(setup->task_name);
2852 kfree(setup);
2853 }
2854 pstr->oss.setup_list = NULL;
2855}
2856
6ac77bc1
TI		 2857static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2858 struct snd_info_buffer *buffer)
1da177e4 2859{
6ac77bc1 2860 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2861 char line[128], str[32], task_name[32];
2862 const char *ptr;
1da177e4 2863 int idx1;
6ac77bc1 2864 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2865
2866 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2867 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2868 memset(&template, 0, sizeof(template));
2869 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2870 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2871 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2872 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2873 continue;
2874 }
2875 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2876 if (!strcmp(setup->task_name, task_name)) {
2877 template = *setup;
2878 break;
2879 }
2880 }
2881 ptr = snd_info_get_str(str, ptr, sizeof(str));
2882 template.periods = simple_strtoul(str, NULL, 10);
2883 ptr = snd_info_get_str(str, ptr, sizeof(str));
2884 template.period_size = simple_strtoul(str, NULL, 10);
2885 for (idx1 = 31; idx1 >= 0; idx1--)
2886 if (template.period_size & (1 << idx1))
2887 break;
2888 for (idx1--; idx1 >= 0; idx1--)
2889 template.period_size &= ~(1 << idx1);
2890 do {
2891 ptr = snd_info_get_str(str, ptr, sizeof(str));
2892 if (!strcmp(str, "disable")) {
2893 template.disable = 1;
2894 } else if (!strcmp(str, "direct")) {
2895 template.direct = 1;
2896 } else if (!strcmp(str, "block")) {
2897 template.block = 1;
2898 } else if (!strcmp(str, "non-block")) {
2899 template.nonblock = 1;
2900 } else if (!strcmp(str, "partial-frag")) {
2901 template.partialfrag = 1;
2902 } else if (!strcmp(str, "no-silence")) {
2903 template.nosilence = 1;
10f69f9e
TI		 2904 } else if (!strcmp(str, "buggy-ptr")) {
2905 template.buggyptr = 1;
1da177e4
LT		 2906 }
2907 } while (*str);
2908 if (setup == NULL) {
060d77b9
TI		 2909 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2910 if (! setup) {
2911 buffer->error = -ENOMEM;
91054598 2912 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9
TI		 2913 return;
2914 }
2915 if (pstr->oss.setup_list == NULL)
2916 pstr->oss.setup_list = setup;
2917 else {
2918 for (setup1 = pstr->oss.setup_list;
2919 setup1->next; setup1 = setup1->next);
2920 setup1->next = setup;
2921 }
2922 template.task_name = kstrdup(task_name, GFP_KERNEL);
2923 if (! template.task_name) {
2924 kfree(setup);
1da177e4 2925 buffer->error = -ENOMEM;
91054598 2926 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9 2927 return;
1da177e4
LT		 2928 }
2929 }
060d77b9 2930 *setup = template;
1a60d4c5 2931 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2932 }
2933}
2934
6ac77bc1 2935static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 2936{
2937 int stream;
2938 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 2939 struct snd_info_entry *entry;
2940 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 2941 if (pstr->substream_count == 0)
2942 continue;
2943 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2944 entry->content = SNDRV_INFO_CONTENT_TEXT;
2945 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
1da177e4 2946 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 2947 entry->c.text.write = snd_pcm_oss_proc_write;
2948 entry->private_data = pstr;
2949 if (snd_info_register(entry) < 0) {
2950 snd_info_free_entry(entry);
2951 entry = NULL;
2952 }
2953 }
2954 pstr->oss.proc_entry = entry;
2955 }
2956}
2957
6ac77bc1 2958static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 2959{
2960 int stream;
2961 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 2962 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 2963 snd_info_free_entry(pstr->oss.proc_entry);
2964 pstr->oss.proc_entry = NULL;
2965 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 2966 }
2967}
b7d90a35 2968#else /* !CONFIG_SND_VERBOSE_PROCFS */
04f141a8
TI		 2969#define snd_pcm_oss_proc_init(pcm)
2970#define snd_pcm_oss_proc_done(pcm)
b7d90a35 2971#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 2972
2973/*
2974 * ENTRY functions
2975 */
2976
9c2e08c5 2977static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 2978{
2979 .owner = THIS_MODULE,
2980 .read = snd_pcm_oss_read,
2981 .write = snd_pcm_oss_write,
2982 .open = snd_pcm_oss_open,
2983 .release = snd_pcm_oss_release,
02f4865f 2984 .llseek = no_llseek,
1da177e4
LT		 2985 .poll = snd_pcm_oss_poll,
2986 .unlocked_ioctl = snd_pcm_oss_ioctl,
2987 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2988 .mmap = snd_pcm_oss_mmap,
2989};
2990
6ac77bc1 2991static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4
LT		 2992{
2993 char name[128];
2994 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2995 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 2996 pcm->card, index, &snd_pcm_oss_f_reg,
f87135f5 2997 pcm, name) < 0) {
d3d579f8
TI		 2998 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2999 pcm->card->number, pcm->device);
1da177e4
LT		 3000 }
3001}
3002
6ac77bc1 3003static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 3004{
3005 pcm->oss.reg = 0;
896e6cc2 3006 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3007 char name[128];
3008 int duplex;
3009 register_oss_dsp(pcm, 0);
3010 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3011 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3012 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3013 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3014#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3015 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3016 pcm->card->number,
3017 name);
3018#endif
3019 pcm->oss.reg++;
3020 pcm->oss.reg_mask |= 1;
3021 }
896e6cc2 3022 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3023 register_oss_dsp(pcm, 1);
3024 pcm->oss.reg++;
3025 pcm->oss.reg_mask |= 2;
3026 }
3027
3028 if (pcm->oss.reg)
3029 snd_pcm_oss_proc_init(pcm);
3030
3031 return 0;
3032}
3033
6ac77bc1 3034static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3035{
3036 if (pcm->oss.reg) {
3037 if (pcm->oss.reg_mask & 1) {
3038 pcm->oss.reg_mask &= ~1;
3039 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3040 pcm->card, 0);
3041 }
3042 if (pcm->oss.reg_mask & 2) {
3043 pcm->oss.reg_mask &= ~2;
3044 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3045 pcm->card, 1);
3046 }
896e6cc2 3047 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3048#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3049 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3050#endif
3051 }
3052 pcm->oss.reg = 0;
1da177e4
LT		 3053 }
3054 return 0;
3055}
3056
c461482c
TI		 3057static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3058{
3059 snd_pcm_oss_disconnect_minor(pcm);
3060 snd_pcm_oss_proc_done(pcm);
3061 return 0;
3062}
3063
6ac77bc1 3064static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3065{
3066 .n_register = snd_pcm_oss_register_minor,
3067 .n_disconnect = snd_pcm_oss_disconnect_minor,
3068 .n_unregister = snd_pcm_oss_unregister_minor,
3069};
3070
3071static int __init alsa_pcm_oss_init(void)
3072{
3073 int i;
3074 int err;
3075
3076 /* check device map table */
3077 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3078 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
d3d579f8
TI		 3079 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3080 i, dsp_map[i]);
1da177e4
LT		 3081 dsp_map[i] = 0;
3082 }
896e6cc2 3083 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
d3d579f8
TI		 3084 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3085 i, adsp_map[i]);
1da177e4
LT		 3086 adsp_map[i] = 1;
3087 }
3088 }
3089 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3090 return err;
3091 return 0;
3092}
3093
3094static void __exit alsa_pcm_oss_exit(void)
3095{
3096 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3097}
3098
3099module_init(alsa_pcm_oss_init)
3100module_exit(alsa_pcm_oss_exit)
Linux 6.x block layer and io_uring tree(s)