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ALSA: snd-usb: added VOX ToneLab ST midi handling
[thirdparty/kernel/stable.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>
65a77217 33#include <linux/module.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>
fea952e5 44#include <sound/mixer_oss.h>
1da177e4
LT		 45
46#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
47
6581f4e7 48static int dsp_map[SNDRV_CARDS];
1da177e4
LT		 49static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50static int nonblock_open = 1;
51
c1017a4c 52MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
1da177e4
LT		 53MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54MODULE_LICENSE("GPL");
55module_param_array(dsp_map, int, NULL, 0444);
56MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57module_param_array(adsp_map, int, NULL, 0444);
58MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59module_param(nonblock_open, bool, 0644);
60MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
6ac77bc1
TI		 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);
3daa7ea6
JJ		 456 if (max < 0) {
457 kfree(save);
7eaa943c 458 return max;
3daa7ea6 459 }
e88e8ae6
TI		 460 last = 1;
461 }
462 _end:
463 kfree(save);
464 if (last)
465 v = snd_pcm_hw_param_last(pcm, params, var, dir);
466 else
467 v = snd_pcm_hw_param_first(pcm, params, var, dir);
7eaa943c 468 snd_BUG_ON(v < 0);
e88e8ae6
TI		 469 return v;
470}
471
472static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
473 snd_pcm_hw_param_t var, unsigned int val,
474 int dir)
475{
476 int changed;
477 if (hw_is_mask(var)) {
478 struct snd_mask *m = hw_param_mask(params, var);
479 if (val == 0 && dir < 0) {
480 changed = -EINVAL;
481 snd_mask_none(m);
482 } else {
483 if (dir > 0)
484 val++;
485 else if (dir < 0)
486 val--;
487 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
488 }
489 } else if (hw_is_interval(var)) {
490 struct snd_interval *i = hw_param_interval(params, var);
491 if (val == 0 && dir < 0) {
492 changed = -EINVAL;
493 snd_interval_none(i);
494 } else if (dir == 0)
495 changed = snd_interval_refine_set(i, val);
496 else {
497 struct snd_interval t;
498 t.openmin = 1;
499 t.openmax = 1;
500 t.empty = 0;
501 t.integer = 0;
502 if (dir < 0) {
503 t.min = val - 1;
504 t.max = val;
505 } else {
506 t.min = val;
507 t.max = val+1;
508 }
509 changed = snd_interval_refine(i, &t);
510 }
511 } else
512 return -EINVAL;
513 if (changed) {
514 params->cmask |= 1 << var;
515 params->rmask |= 1 << var;
516 }
517 return changed;
518}
519
520/**
521 * snd_pcm_hw_param_set
522 * @pcm: PCM instance
523 * @params: the hw_params instance
524 * @var: parameter to retrieve
525 * @val: value to set
526 * @dir: pointer to the direction (-1,0,1) or NULL
527 *
528 * Inside configuration space defined by PARAMS remove from PAR all
529 * values != VAL. Reduce configuration space accordingly.
530 * Return VAL or -EINVAL if the configuration space is empty
531 */
532static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
533 struct snd_pcm_hw_params *params,
534 snd_pcm_hw_param_t var, unsigned int val,
535 int dir)
536{
537 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
538 if (changed < 0)
539 return changed;
540 if (params->rmask) {
541 int err = snd_pcm_hw_refine(pcm, params);
542 if (err < 0)
543 return err;
544 }
545 return snd_pcm_hw_param_value(params, var, NULL);
546}
547
548static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
549 snd_pcm_hw_param_t var)
550{
551 int changed;
552 changed = snd_interval_setinteger(hw_param_interval(params, var));
553 if (changed) {
554 params->cmask |= 1 << var;
555 params->rmask |= 1 << var;
556 }
557 return changed;
558}
559
560/*
561 * plugin
562 */
563
21a3479a 564#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 565static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 566{
6ac77bc1
TI		 567 struct snd_pcm_runtime *runtime = substream->runtime;
568 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 569
570 plugin = runtime->oss.plugin_first;
571 while (plugin) {
572 next = plugin->next;
573 snd_pcm_plugin_free(plugin);
574 plugin = next;
575 }
576 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
577 return 0;
578}
579
6ac77bc1 580static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 581{
6ac77bc1 582 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 583 plugin->next = runtime->oss.plugin_first;
584 plugin->prev = NULL;
585 if (runtime->oss.plugin_first) {
586 runtime->oss.plugin_first->prev = plugin;
587 runtime->oss.plugin_first = plugin;
588 } else {
589 runtime->oss.plugin_last =
590 runtime->oss.plugin_first = plugin;
591 }
592 return 0;
593}
594
6ac77bc1 595int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 596{
6ac77bc1 597 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 598 plugin->next = NULL;
599 plugin->prev = runtime->oss.plugin_last;
600 if (runtime->oss.plugin_last) {
601 runtime->oss.plugin_last->next = plugin;
602 runtime->oss.plugin_last = plugin;
603 } else {
604 runtime->oss.plugin_last =
605 runtime->oss.plugin_first = plugin;
606 }
607 return 0;
608}
21a3479a 609#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 610
6ac77bc1 611static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 612{
6ac77bc1 613 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 614 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 615 long bytes = frames_to_bytes(runtime, frames);
1da177e4 616 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 617 return bytes;
cdc5c53f
TI		 618#if BITS_PER_LONG >= 64
619 return runtime->oss.buffer_bytes * bytes / buffer_size;
620#else
621 {
622 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
3f7440a6 623 return div_u64(bsize, buffer_size);
cdc5c53f
TI		 624 }
625#endif
1da177e4
LT		 626}
627
6ac77bc1 628static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 629{
6ac77bc1 630 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 631 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 632 if (buffer_size == runtime->oss.buffer_bytes)
633 return bytes_to_frames(runtime, bytes);
634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
635}
636
f240406b
JK		 637static inline
638snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
639{
e7636925 640 return runtime->hw_ptr_interrupt;
f240406b
JK		 641}
642
24038a25
TI		 643/* define extended formats in the recent OSS versions (if any) */
644/* linear formats */
645#define AFMT_S32_LE 0x00001000
646#define AFMT_S32_BE 0x00002000
647#define AFMT_S24_LE 0x00008000
648#define AFMT_S24_BE 0x00010000
649#define AFMT_S24_PACKED 0x00040000
650
651/* other supported formats */
652#define AFMT_FLOAT 0x00004000
653#define AFMT_SPDIF_RAW 0x00020000
654
655/* unsupported formats */
656#define AFMT_AC3 0x00000400
657#define AFMT_VORBIS 0x00000800
658
fea952e5 659static snd_pcm_format_t snd_pcm_oss_format_from(int format)
1da177e4
LT		 660{
661 switch (format) {
662 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
663 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
664 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
665 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
666 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
667 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
668 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
669 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
670 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
671 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
24038a25
TI		 672 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
673 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
674 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
675 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
676 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
677 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
678 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
1da177e4
LT		 679 default: return SNDRV_PCM_FORMAT_U8;
680 }
681}
682
fea952e5 683static int snd_pcm_oss_format_to(snd_pcm_format_t format)
1da177e4
LT		 684{
685 switch (format) {
686 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
687 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
688 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
689 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
690 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
691 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
692 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
693 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
694 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
695 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
24038a25
TI		 696 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
697 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
698 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
699 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
700 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
701 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
702 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
1da177e4
LT		 703 default: return -EINVAL;
704 }
705}
706
6ac77bc1
TI		 707static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
708 struct snd_pcm_hw_params *oss_params,
709 struct snd_pcm_hw_params *slave_params)
1da177e4
LT		 710{
711 size_t s;
712 size_t oss_buffer_size, oss_period_size, oss_periods;
713 size_t min_period_size, max_period_size;
6ac77bc1 714 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 715 size_t oss_frame_size;
716
717 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
718 params_channels(oss_params) / 8;
719
720 oss_buffer_size = snd_pcm_plug_client_size(substream,
721 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
722 oss_buffer_size = 1 << ld2(oss_buffer_size);
9c323fcb 723 if (atomic_read(&substream->mmap_count)) {
1da177e4
LT		 724 if (oss_buffer_size > runtime->oss.mmap_bytes)
725 oss_buffer_size = runtime->oss.mmap_bytes;
726 }
727
060d77b9
TI		 728 if (substream->oss.setup.period_size > 16)
729 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 730 else if (runtime->oss.fragshift) {
731 oss_period_size = 1 << runtime->oss.fragshift;
732 if (oss_period_size > oss_buffer_size / 2)
733 oss_period_size = oss_buffer_size / 2;
734 } else {
735 int sd;
736 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
737
738 oss_period_size = oss_buffer_size;
739 do {
740 oss_period_size /= 2;
741 } while (oss_period_size > bytes_per_sec);
742 if (runtime->oss.subdivision == 0) {
743 sd = 4;
744 if (oss_period_size / sd > 4096)
745 sd *= 2;
746 if (oss_period_size / sd < 4096)
747 sd = 1;
748 } else
749 sd = runtime->oss.subdivision;
750 oss_period_size /= sd;
751 if (oss_period_size < 16)
752 oss_period_size = 16;
753 }
754
755 min_period_size = snd_pcm_plug_client_size(substream,
756 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
757 min_period_size *= oss_frame_size;
758 min_period_size = 1 << (ld2(min_period_size - 1) + 1);
759 if (oss_period_size < min_period_size)
760 oss_period_size = min_period_size;
761
762 max_period_size = snd_pcm_plug_client_size(substream,
763 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
764 max_period_size *= oss_frame_size;
765 max_period_size = 1 << ld2(max_period_size);
766 if (oss_period_size > max_period_size)
767 oss_period_size = max_period_size;
768
769 oss_periods = oss_buffer_size / oss_period_size;
770
060d77b9
TI		 771 if (substream->oss.setup.periods > 1)
772 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 773
774 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
775 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
776 s = runtime->oss.maxfrags;
777 if (oss_periods > s)
778 oss_periods = s;
779
780 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
781 if (s < 2)
782 s = 2;
783 if (oss_periods < s)
784 oss_periods = s;
785
786 while (oss_period_size * oss_periods > oss_buffer_size)
787 oss_period_size /= 2;
788
7eaa943c
TI		 789 if (oss_period_size < 16)
790 return -EINVAL;
1da177e4
LT		 791 runtime->oss.period_bytes = oss_period_size;
792 runtime->oss.period_frames = 1;
793 runtime->oss.periods = oss_periods;
794 return 0;
795}
796
6ac77bc1
TI		 797static int choose_rate(struct snd_pcm_substream *substream,
798 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 799{
6ac77bc1
TI		 800 struct snd_interval *it;
801 struct snd_pcm_hw_params *save;
1da177e4
LT		 802 unsigned int rate, prev;
803
804 save = kmalloc(sizeof(*save), GFP_KERNEL);
805 if (save == NULL)
806 return -ENOMEM;
807 *save = *params;
808 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
809
810 /* try multiples of the best rate */
811 rate = best_rate;
812 for (;;) {
813 if (it->max < rate || (it->max == rate && it->openmax))
814 break;
815 if (it->min < rate || (it->min == rate && !it->openmin)) {
816 int ret;
817 ret = snd_pcm_hw_param_set(substream, params,
818 SNDRV_PCM_HW_PARAM_RATE,
819 rate, 0);
820 if (ret == (int)rate) {
821 kfree(save);
822 return rate;
823 }
824 *params = *save;
825 }
826 prev = rate;
827 rate += best_rate;
828 if (rate <= prev)
829 break;
830 }
831
832 /* not found, use the nearest rate */
833 kfree(save);
834 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
835}
836
6ac77bc1 837static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
1da177e4 838{
6ac77bc1
TI		 839 struct snd_pcm_runtime *runtime = substream->runtime;
840 struct snd_pcm_hw_params *params, *sparams;
841 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 842 ssize_t oss_buffer_size, oss_period_size;
843 size_t oss_frame_size;
844 int err;
845 int direct;
fea952e5
CL		 846 snd_pcm_format_t format, sformat;
847 int n;
6ac77bc1
TI		 848 struct snd_mask sformat_mask;
849 struct snd_mask mask;
1da177e4 850
e3a5d59a
TI		 851 if (mutex_lock_interruptible(&runtime->oss.params_lock))
852 return -EINTR;
1da177e4
LT		 853 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
854 params = kmalloc(sizeof(*params), GFP_KERNEL);
855 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
856 if (!sw_params || !params || !sparams) {
857 snd_printd("No memory\n");
858 err = -ENOMEM;
859 goto failure;
860 }
861
9c323fcb 862 if (atomic_read(&substream->mmap_count))
1da177e4 863 direct = 1;
060d77b9
TI		 864 else
865 direct = substream->oss.setup.direct;
1da177e4
LT		 866
867 _snd_pcm_hw_params_any(sparams);
868 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
869 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
870 snd_mask_none(&mask);
9c323fcb 871 if (atomic_read(&substream->mmap_count))
fea952e5 872 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 873 else {
fea952e5 874 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 875 if (!direct)
fea952e5 876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
1da177e4
LT		 877 }
878 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
879 if (err < 0) {
880 snd_printd("No usable accesses\n");
881 err = -EINVAL;
882 goto failure;
883 }
884 choose_rate(substream, sparams, runtime->oss.rate);
885 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
886
887 format = snd_pcm_oss_format_from(runtime->oss.format);
888
889 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
890 if (direct)
891 sformat = format;
892 else
893 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
894
fea952e5
CL		 895 if ((__force int)sformat < 0 ||
896 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
897 for (sformat = (__force snd_pcm_format_t)0;
898 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
899 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
900 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
1da177e4
LT		 901 snd_pcm_oss_format_to(sformat) >= 0)
902 break;
903 }
fea952e5 904 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
1da177e4
LT		 905 snd_printd("Cannot find a format!!!\n");
906 err = -EINVAL;
907 goto failure;
908 }
909 }
fea952e5 910 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
7eaa943c
TI		 911 if (err < 0)
912 goto failure;
1da177e4
LT		 913
914 if (direct) {
915 memcpy(params, sparams, sizeof(*params));
916 } else {
917 _snd_pcm_hw_params_any(params);
918 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
fea952e5 919 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
1da177e4 920 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
fea952e5 921 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
1da177e4
LT		 922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
923 runtime->oss.channels, 0);
924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
925 runtime->oss.rate, 0);
926 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
927 params_access(params), params_format(params),
928 params_channels(params), params_rate(params));
929 }
930 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
931 params_access(sparams), params_format(sparams),
932 params_channels(sparams), params_rate(sparams));
933
934 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
935 params_channels(params) / 8;
936
21a3479a 937#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 938 snd_pcm_oss_plugin_clear(substream);
939 if (!direct) {
940 /* add necessary plugins */
941 snd_pcm_oss_plugin_clear(substream);
942 if ((err = snd_pcm_plug_format_plugins(substream,
943 params,
944 sparams)) < 0) {
945 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
946 snd_pcm_oss_plugin_clear(substream);
947 goto failure;
948 }
949 if (runtime->oss.plugin_first) {
6ac77bc1 950 struct snd_pcm_plugin *plugin;
1da177e4
LT		 951 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
952 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
953 snd_pcm_oss_plugin_clear(substream);
954 goto failure;
955 }
956 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
957 err = snd_pcm_plugin_append(plugin);
958 } else {
959 err = snd_pcm_plugin_insert(plugin);
960 }
961 if (err < 0) {
962 snd_pcm_oss_plugin_clear(substream);
963 goto failure;
964 }
965 }
966 }
21a3479a 967#endif
1da177e4
LT		 968
969 err = snd_pcm_oss_period_size(substream, params, sparams);
970 if (err < 0)
971 goto failure;
972
973 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
974 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
7eaa943c
TI		 975 if (err < 0)
976 goto failure;
1da177e4
LT		 977
978 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
979 runtime->oss.periods, NULL);
7eaa943c
TI		 980 if (err < 0)
981 goto failure;
1da177e4
LT		 982
983 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
984
985 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
986 snd_printd("HW_PARAMS failed: %i\n", err);
987 goto failure;
988 }
989
990 memset(sw_params, 0, sizeof(*sw_params));
991 if (runtime->oss.trigger) {
992 sw_params->start_threshold = 1;
993 } else {
994 sw_params->start_threshold = runtime->boundary;
995 }
9c323fcb
TI		 996 if (atomic_read(&substream->mmap_count) ||
997 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 998 sw_params->stop_threshold = runtime->boundary;
999 else
1000 sw_params->stop_threshold = runtime->buffer_size;
1001 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1002 sw_params->period_step = 1;
004e6538
TI		 1003 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1004 1 : runtime->period_size;
9c323fcb 1005 if (atomic_read(&substream->mmap_count) ||
060d77b9 1006 substream->oss.setup.nosilence) {
1da177e4
LT		 1007 sw_params->silence_threshold = 0;
1008 sw_params->silence_size = 0;
1009 } else {
1010 snd_pcm_uframes_t frames;
1011 frames = runtime->period_size + 16;
1012 if (frames > runtime->buffer_size)
1013 frames = runtime->buffer_size;
1014 sw_params->silence_threshold = frames;
1015 sw_params->silence_size = frames;
1016 }
1017
1018 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
1019 snd_printd("SW_PARAMS failed: %i\n", err);
1020 goto failure;
1021 }
1022
1023 runtime->oss.periods = params_periods(sparams);
1024 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
7eaa943c
TI		 1025 if (oss_period_size < 0) {
1026 err = -EINVAL;
1027 goto failure;
1028 }
21a3479a 1029#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1030 if (runtime->oss.plugin_first) {
1031 err = snd_pcm_plug_alloc(substream, oss_period_size);
1032 if (err < 0)
1033 goto failure;
1034 }
21a3479a 1035#endif
1da177e4
LT		 1036 oss_period_size *= oss_frame_size;
1037
1038 oss_buffer_size = oss_period_size * runtime->oss.periods;
7eaa943c
TI		 1039 if (oss_buffer_size < 0) {
1040 err = -EINVAL;
1041 goto failure;
1042 }
1da177e4
LT		 1043
1044 runtime->oss.period_bytes = oss_period_size;
1045 runtime->oss.buffer_bytes = oss_buffer_size;
1046
1047 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1048 runtime->oss.period_bytes,
1049 runtime->oss.buffer_bytes);
1050 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1051 params_period_size(sparams),
1052 params_buffer_size(sparams));
1053
1054 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1055 runtime->oss.channels = params_channels(params);
1056 runtime->oss.rate = params_rate(params);
1057
1da177e4
LT		 1058 vfree(runtime->oss.buffer);
1059 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
cbbb0570
RK		 1060 if (!runtime->oss.buffer) {
1061 err = -ENOMEM;
1062 goto failure;
1063 }
1064
1065 runtime->oss.params = 0;
1066 runtime->oss.prepare = 1;
1da177e4
LT		 1067 runtime->oss.buffer_used = 0;
1068 if (runtime->dma_area)
1069 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1070
1071 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1072
1073 err = 0;
1074failure:
1075 kfree(sw_params);
1076 kfree(params);
1077 kfree(sparams);
e3a5d59a 1078 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1079 return err;
1080}
1081
6ac77bc1 1082static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1083{
1084 int idx, err;
6ac77bc1 1085 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 1086
1087 for (idx = 0; idx < 2; idx++) {
1088 substream = pcm_oss_file->streams[idx];
1089 if (substream == NULL)
1090 continue;
1091 if (asubstream == NULL)
1092 asubstream = substream;
1093 if (substream->runtime->oss.params) {
1094 err = snd_pcm_oss_change_params(substream);
1095 if (err < 0)
1096 return err;
1097 }
1098 }
7eaa943c
TI		 1099 if (!asubstream)
1100 return -EIO;
1da177e4
LT		 1101 if (r_substream)
1102 *r_substream = asubstream;
1103 return 0;
1104}
1105
6ac77bc1 1106static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1107{
1108 int err;
6ac77bc1 1109 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1110
1111 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1112 if (err < 0) {
1113 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1114 return err;
1115 }
1116 runtime->oss.prepare = 0;
f240406b 1117 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1118 runtime->oss.period_ptr = 0;
1119 runtime->oss.buffer_used = 0;
1120
1121 return 0;
1122}
1123
6ac77bc1 1124static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1125{
6ac77bc1 1126 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1127 int err;
1128
1129 if (substream == NULL)
1130 return 0;
1131 runtime = substream->runtime;
1132 if (runtime->oss.params) {
1133 err = snd_pcm_oss_change_params(substream);
1134 if (err < 0)
1135 return err;
1136 }
1137 if (runtime->oss.prepare) {
1138 err = snd_pcm_oss_prepare(substream);
1139 if (err < 0)
1140 return err;
1141 }
1142 return 0;
1143}
1144
6ac77bc1 1145static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1146{
6ac77bc1 1147 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1148 snd_pcm_uframes_t frames;
1149 int err = 0;
1150
1151 while (1) {
1152 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1153 if (err < 0)
1154 break;
1155 runtime = substream->runtime;
1156 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1157 break;
1158 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1159 /* until avail(delay) <= buffer_size */
1160 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1161 frames /= runtime->period_size;
1162 frames *= runtime->period_size;
1163 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1164 if (err < 0)
1165 break;
1166 }
1167 return err;
1168}
1169
6ac77bc1 1170snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1171{
6ac77bc1 1172 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1173 int ret;
1174 while (1) {
1175 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1176 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1177#ifdef OSS_DEBUG
1178 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1179 printk(KERN_DEBUG "pcm_oss: write: "
1180 "recovering from XRUN\n");
1da177e4 1181 else
006de267
TI		 1182 printk(KERN_DEBUG "pcm_oss: write: "
1183 "recovering from SUSPEND\n");
1da177e4
LT		 1184#endif
1185 ret = snd_pcm_oss_prepare(substream);
1186 if (ret < 0)
1187 break;
1188 }
1189 if (in_kernel) {
1190 mm_segment_t fs;
1191 fs = snd_enter_user();
fea952e5 1192 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1193 snd_leave_user(fs);
1194 } else {
fea952e5 1195 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1196 }
1197 if (ret != -EPIPE && ret != -ESTRPIPE)
1198 break;
1199 /* test, if we can't store new data, because the stream */
1200 /* has not been started */
1201 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1202 return -EAGAIN;
1203 }
1204 return ret;
1205}
1206
6ac77bc1 1207snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1208{
6ac77bc1 1209 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1210 snd_pcm_sframes_t delay;
1211 int ret;
1212 while (1) {
1213 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1214 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215#ifdef OSS_DEBUG
1216 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1217 printk(KERN_DEBUG "pcm_oss: read: "
1218 "recovering from XRUN\n");
1da177e4 1219 else
006de267
TI		 1220 printk(KERN_DEBUG "pcm_oss: read: "
1221 "recovering from SUSPEND\n");
1da177e4
LT		 1222#endif
1223 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1224 if (ret < 0)
1225 break;
1226 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1227 ret = snd_pcm_oss_prepare(substream);
1228 if (ret < 0)
1229 break;
1230 }
1231 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1232 if (ret < 0)
1233 break;
1234 if (in_kernel) {
1235 mm_segment_t fs;
1236 fs = snd_enter_user();
fea952e5 1237 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1238 snd_leave_user(fs);
1239 } else {
fea952e5 1240 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1241 }
1242 if (ret == -EPIPE) {
1243 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1244 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1245 if (ret < 0)
1246 break;
1247 }
1248 continue;
1249 }
1250 if (ret != -ESTRPIPE)
1251 break;
1252 }
1253 return ret;
1254}
1255
6ac77bc1 1256snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1257{
6ac77bc1 1258 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1259 int ret;
1260 while (1) {
1261 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1262 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1263#ifdef OSS_DEBUG
1264 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1265 printk(KERN_DEBUG "pcm_oss: writev: "
1266 "recovering from XRUN\n");
1da177e4 1267 else
006de267
TI		 1268 printk(KERN_DEBUG "pcm_oss: writev: "
1269 "recovering from SUSPEND\n");
1da177e4
LT		 1270#endif
1271 ret = snd_pcm_oss_prepare(substream);
1272 if (ret < 0)
1273 break;
1274 }
1275 if (in_kernel) {
1276 mm_segment_t fs;
1277 fs = snd_enter_user();
1278 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1279 snd_leave_user(fs);
1280 } else {
1281 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
1282 }
1283 if (ret != -EPIPE && ret != -ESTRPIPE)
1284 break;
1285
1286 /* test, if we can't store new data, because the stream */
1287 /* has not been started */
1288 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1289 return -EAGAIN;
1290 }
1291 return ret;
1292}
1293
6ac77bc1 1294snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1295{
6ac77bc1 1296 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1297 int ret;
1298 while (1) {
1299 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1300 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1301#ifdef OSS_DEBUG
1302 if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
006de267
TI		 1303 printk(KERN_DEBUG "pcm_oss: readv: "
1304 "recovering from XRUN\n");
1da177e4 1305 else
006de267
TI		 1306 printk(KERN_DEBUG "pcm_oss: readv: "
1307 "recovering from SUSPEND\n");
1da177e4
LT		 1308#endif
1309 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1310 if (ret < 0)
1311 break;
1312 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1313 ret = snd_pcm_oss_prepare(substream);
1314 if (ret < 0)
1315 break;
1316 }
1317 if (in_kernel) {
1318 mm_segment_t fs;
1319 fs = snd_enter_user();
1320 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1321 snd_leave_user(fs);
1322 } else {
1323 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1324 }
1325 if (ret != -EPIPE && ret != -ESTRPIPE)
1326 break;
1327 }
1328 return ret;
1329}
1330
6ac77bc1 1331static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1332{
6ac77bc1 1333 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1334 snd_pcm_sframes_t frames, frames1;
21a3479a 1335#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1336 if (runtime->oss.plugin_first) {
6ac77bc1 1337 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1338 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1339 if (!in_kernel) {
fea952e5 1340 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1da177e4
LT		 1341 return -EFAULT;
1342 buf = runtime->oss.buffer;
1343 }
1344 frames = bytes / oss_frame_bytes;
1345 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1346 if (frames1 < 0)
1347 return frames1;
1348 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1349 if (frames1 <= 0)
1350 return frames1;
1351 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 1352 } else
1353#endif
1354 {
1da177e4
LT		 1355 frames = bytes_to_frames(runtime, bytes);
1356 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1357 if (frames1 <= 0)
1358 return frames1;
1359 bytes = frames_to_bytes(runtime, frames1);
1360 }
1361 return bytes;
1362}
1363
6ac77bc1 1364static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1365{
1366 size_t xfer = 0;
1367 ssize_t tmp;
6ac77bc1 1368 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1369
9c323fcb 1370 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1371 return -ENXIO;
1372
1373 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1374 return tmp;
e3a5d59a 1375 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1376 while (bytes > 0) {
1377 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1378 tmp = bytes;
1379 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1380 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1381 if (tmp > 0) {
e3a5d59a
TI		 1382 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1383 tmp = -EFAULT;
1384 goto err;
1385 }
1da177e4
LT		 1386 }
1387 runtime->oss.buffer_used += tmp;
1388 buf += tmp;
1389 bytes -= tmp;
1390 xfer += tmp;
060d77b9 1391 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 1392 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1393 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1394 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1395 if (tmp <= 0)
e3a5d59a 1396 goto err;
1da177e4
LT		 1397 runtime->oss.bytes += tmp;
1398 runtime->oss.period_ptr += tmp;
1399 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1400 if (runtime->oss.period_ptr == 0 ||
1401 runtime->oss.period_ptr == runtime->oss.buffer_used)
1402 runtime->oss.buffer_used = 0;
e3a5d59a
TI		 1403 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1404 tmp = -EAGAIN;
1405 goto err;
1406 }
1da177e4
LT		 1407 }
1408 } else {
4d23359b
CL		 1409 tmp = snd_pcm_oss_write2(substream,
1410 (const char __force *)buf,
1411 runtime->oss.period_bytes, 0);
1da177e4 1412 if (tmp <= 0)
e3a5d59a 1413 goto err;
1da177e4
LT		 1414 runtime->oss.bytes += tmp;
1415 buf += tmp;
1416 bytes -= tmp;
1417 xfer += tmp;
0df63e44 1418 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4
LT		 1419 tmp != runtime->oss.period_bytes)
1420 break;
1421 }
1422 }
e3a5d59a 1423 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1424 return xfer;
e3a5d59a
TI		 1425
1426 err:
1427 mutex_unlock(&runtime->oss.params_lock);
1428 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1429}
1430
6ac77bc1 1431static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1432{
6ac77bc1 1433 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1434 snd_pcm_sframes_t frames, frames1;
21a3479a 1435#ifdef CONFIG_SND_PCM_OSS_PLUGINS
fea952e5 1436 char __user *final_dst = (char __force __user *)buf;
1da177e4 1437 if (runtime->oss.plugin_first) {
6ac77bc1 1438 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1439 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1440 if (!in_kernel)
1441 buf = runtime->oss.buffer;
1442 frames = bytes / oss_frame_bytes;
1443 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1444 if (frames1 < 0)
1445 return frames1;
1446 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1447 if (frames1 <= 0)
1448 return frames1;
1449 bytes = frames1 * oss_frame_bytes;
1450 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1451 return -EFAULT;
21a3479a
JK		 1452 } else
1453#endif
1454 {
1da177e4
LT		 1455 frames = bytes_to_frames(runtime, bytes);
1456 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1457 if (frames1 <= 0)
1458 return frames1;
1459 bytes = frames_to_bytes(runtime, frames1);
1460 }
1461 return bytes;
1462}
1463
6ac77bc1 1464static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1465{
1466 size_t xfer = 0;
1467 ssize_t tmp;
6ac77bc1 1468 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1469
9c323fcb 1470 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1471 return -ENXIO;
1472
1473 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1474 return tmp;
e3a5d59a 1475 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1476 while (bytes > 0) {
1477 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1478 if (runtime->oss.buffer_used == 0) {
1479 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1480 if (tmp <= 0)
e3a5d59a 1481 goto err;
1da177e4
LT		 1482 runtime->oss.bytes += tmp;
1483 runtime->oss.period_ptr = tmp;
1484 runtime->oss.buffer_used = tmp;
1485 }
1486 tmp = bytes;
1487 if ((size_t) tmp > runtime->oss.buffer_used)
1488 tmp = runtime->oss.buffer_used;
e3a5d59a
TI		 1489 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1490 tmp = -EFAULT;
1491 goto err;
1492 }
1da177e4
LT		 1493 buf += tmp;
1494 bytes -= tmp;
1495 xfer += tmp;
1496 runtime->oss.buffer_used -= tmp;
1497 } else {
4d23359b
CL		 1498 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1499 runtime->oss.period_bytes, 0);
1da177e4 1500 if (tmp <= 0)
e3a5d59a 1501 goto err;
1da177e4
LT		 1502 runtime->oss.bytes += tmp;
1503 buf += tmp;
1504 bytes -= tmp;
1505 xfer += tmp;
1506 }
1507 }
e3a5d59a 1508 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1509 return xfer;
e3a5d59a
TI		 1510
1511 err:
1512 mutex_unlock(&runtime->oss.params_lock);
1513 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1514}
1515
6ac77bc1 1516static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1517{
6ac77bc1 1518 struct snd_pcm_substream *substream;
60686aa0
TI		 1519 struct snd_pcm_runtime *runtime;
1520 int i;
1da177e4 1521
60686aa0
TI		 1522 for (i = 0; i < 2; i++) {
1523 substream = pcm_oss_file->streams[i];
1524 if (!substream)
1525 continue;
1526 runtime = substream->runtime;
bf1bbb5a 1527 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
60686aa0
TI		 1528 runtime->oss.prepare = 1;
1529 runtime->oss.buffer_used = 0;
1530 runtime->oss.prev_hw_ptr_period = 0;
1531 runtime->oss.period_ptr = 0;
1da177e4
LT		 1532 }
1533 return 0;
1534}
1535
6ac77bc1 1536static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1537{
6ac77bc1 1538 struct snd_pcm_substream *substream;
1da177e4
LT		 1539 int err;
1540
1541 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1542 if (substream != NULL) {
1543 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1544 return err;
bf1bbb5a 1545 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 1546 }
1547 /* note: all errors from the start action are ignored */
1548 /* OSS apps do not know, how to handle them */
1549 return 0;
1550}
1551
6ac77bc1 1552static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1553{
6ac77bc1 1554 struct snd_pcm_runtime *runtime;
1da177e4 1555 ssize_t result = 0;
fea952e5 1556 snd_pcm_state_t state;
1da177e4
LT		 1557 long res;
1558 wait_queue_t wait;
1559
1560 runtime = substream->runtime;
1561 init_waitqueue_entry(&wait, current);
1562 add_wait_queue(&runtime->sleep, &wait);
1563#ifdef OSS_DEBUG
006de267 1564 printk(KERN_DEBUG "sync1: size = %li\n", size);
1da177e4
LT		 1565#endif
1566 while (1) {
1567 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1568 if (result > 0) {
1569 runtime->oss.buffer_used = 0;
1570 result = 0;
1571 break;
1572 }
1573 if (result != 0 && result != -EAGAIN)
1574 break;
1575 result = 0;
1576 set_current_state(TASK_INTERRUPTIBLE);
1577 snd_pcm_stream_lock_irq(substream);
fea952e5 1578 state = runtime->status->state;
1da177e4 1579 snd_pcm_stream_unlock_irq(substream);
fea952e5 1580 if (state != SNDRV_PCM_STATE_RUNNING) {
1da177e4
LT		 1581 set_current_state(TASK_RUNNING);
1582 break;
1583 }
1584 res = schedule_timeout(10 * HZ);
1585 if (signal_pending(current)) {
1586 result = -ERESTARTSYS;
1587 break;
1588 }
1589 if (res == 0) {
1590 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1591 result = -EIO;
1592 break;
1593 }
1594 }
1595 remove_wait_queue(&runtime->sleep, &wait);
1596 return result;
1597}
1598
6ac77bc1 1599static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1600{
1601 int err = 0;
1602 unsigned int saved_f_flags;
6ac77bc1
TI		 1603 struct snd_pcm_substream *substream;
1604 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1605 snd_pcm_format_t format;
1606 unsigned long width;
1607 size_t size;
1608
1609 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1610 if (substream != NULL) {
1611 runtime = substream->runtime;
9c323fcb 1612 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1613 goto __direct;
1614 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1615 return err;
1616 format = snd_pcm_oss_format_from(runtime->oss.format);
1617 width = snd_pcm_format_physical_width(format);
e3a5d59a 1618 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1619 if (runtime->oss.buffer_used > 0) {
1620#ifdef OSS_DEBUG
006de267 1621 printk(KERN_DEBUG "sync: buffer_used\n");
1da177e4
LT		 1622#endif
1623 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1624 snd_pcm_format_set_silence(format,
1625 runtime->oss.buffer + runtime->oss.buffer_used,
1626 size);
1627 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
e3a5d59a
TI		 1628 if (err < 0) {
1629 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1630 return err;
e3a5d59a 1631 }
1da177e4
LT		 1632 } else if (runtime->oss.period_ptr > 0) {
1633#ifdef OSS_DEBUG
006de267 1634 printk(KERN_DEBUG "sync: period_ptr\n");
1da177e4
LT		 1635#endif
1636 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1637 snd_pcm_format_set_silence(format,
1638 runtime->oss.buffer,
1639 size * 8 / width);
1640 err = snd_pcm_oss_sync1(substream, size);
e3a5d59a
TI		 1641 if (err < 0) {
1642 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1643 return err;
e3a5d59a 1644 }
1da177e4
LT		 1645 }
1646 /*
1647 * The ALSA's period might be a bit large than OSS one.
1648 * Fill the remain portion of ALSA period with zeros.
1649 */
1650 size = runtime->control->appl_ptr % runtime->period_size;
1651 if (size > 0) {
1652 size = runtime->period_size - size;
1653 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1654 size = (runtime->frame_bits * size) / 8;
1655 while (size > 0) {
1656 mm_segment_t fs;
1657 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1658 size -= size1;
1659 size1 *= 8;
1660 size1 /= runtime->sample_bits;
1661 snd_pcm_format_set_silence(runtime->format,
1662 runtime->oss.buffer,
1663 size1);
4939c660 1664 size1 /= runtime->channels; /* frames */
1da177e4 1665 fs = snd_enter_user();
fea952e5 1666 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1da177e4
LT		 1667 snd_leave_user(fs);
1668 }
1669 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1670 void __user *buffers[runtime->channels];
1671 memset(buffers, 0, runtime->channels * sizeof(void *));
1672 snd_pcm_lib_writev(substream, buffers, size);
1673 }
1674 }
e3a5d59a 1675 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1676 /*
1677 * finish sync: drain the buffer
1678 */
1679 __direct:
0df63e44
TI		 1680 saved_f_flags = substream->f_flags;
1681 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1682 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1683 substream->f_flags = saved_f_flags;
1da177e4
LT		 1684 if (err < 0)
1685 return err;
1686 runtime->oss.prepare = 1;
1687 }
1688
1689 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1690 if (substream != NULL) {
1691 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1692 return err;
1693 runtime = substream->runtime;
bf1bbb5a 1694 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1695 if (err < 0)
1696 return err;
1697 runtime->oss.buffer_used = 0;
1698 runtime->oss.prepare = 1;
1699 }
1700 return 0;
1701}
1702
6ac77bc1 1703static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1704{
1705 int idx;
1706
1707 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1708 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1709 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1710 if (substream == NULL)
1711 continue;
1712 runtime = substream->runtime;
1713 if (rate < 1000)
1714 rate = 1000;
1715 else if (rate > 192000)
1716 rate = 192000;
1717 if (runtime->oss.rate != rate) {
1718 runtime->oss.params = 1;
1719 runtime->oss.rate = rate;
1720 }
1721 }
1722 return snd_pcm_oss_get_rate(pcm_oss_file);
1723}
1724
6ac77bc1 1725static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1726{
6ac77bc1 1727 struct snd_pcm_substream *substream;
1da177e4
LT		 1728 int err;
1729
1730 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1731 return err;
1732 return substream->runtime->oss.rate;
1733}
1734
6ac77bc1 1735static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1736{
1737 int idx;
1738 if (channels < 1)
1739 channels = 1;
1740 if (channels > 128)
1741 return -EINVAL;
1742 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1743 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1744 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1745 if (substream == NULL)
1746 continue;
1747 runtime = substream->runtime;
1748 if (runtime->oss.channels != channels) {
1749 runtime->oss.params = 1;
1750 runtime->oss.channels = channels;
1751 }
1752 }
1753 return snd_pcm_oss_get_channels(pcm_oss_file);
1754}
1755
6ac77bc1 1756static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1757{
6ac77bc1 1758 struct snd_pcm_substream *substream;
1da177e4
LT		 1759 int err;
1760
1761 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1762 return err;
1763 return substream->runtime->oss.channels;
1764}
1765
6ac77bc1 1766static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1767{
6ac77bc1 1768 struct snd_pcm_substream *substream;
1da177e4
LT		 1769 int err;
1770
1771 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1772 return err;
1773 return substream->runtime->oss.period_bytes;
1774}
1775
6ac77bc1 1776static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1777{
6ac77bc1 1778 struct snd_pcm_substream *substream;
1da177e4
LT		 1779 int err;
1780 int direct;
6ac77bc1 1781 struct snd_pcm_hw_params *params;
1da177e4 1782 unsigned int formats = 0;
6ac77bc1 1783 struct snd_mask format_mask;
1da177e4
LT		 1784 int fmt;
1785
1786 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1787 return err;
9c323fcb 1788 if (atomic_read(&substream->mmap_count))
1da177e4 1789 direct = 1;
060d77b9
TI		 1790 else
1791 direct = substream->oss.setup.direct;
1da177e4
LT		 1792 if (!direct)
1793 return AFMT_MU_LAW | AFMT_U8 |
1794 AFMT_S16_LE | AFMT_S16_BE |
1795 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1796 AFMT_U16_BE |
1797 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1798 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1799 AFMT_S24_PACKED;
1da177e4
LT		 1800 params = kmalloc(sizeof(*params), GFP_KERNEL);
1801 if (!params)
1802 return -ENOMEM;
1803 _snd_pcm_hw_params_any(params);
1804 err = snd_pcm_hw_refine(substream, params);
1805 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1806 kfree(params);
7eaa943c
TI		 1807 if (err < 0)
1808 return err;
1da177e4
LT		 1809 for (fmt = 0; fmt < 32; ++fmt) {
1810 if (snd_mask_test(&format_mask, fmt)) {
1811 int f = snd_pcm_oss_format_to(fmt);
1812 if (f >= 0)
1813 formats |= f;
1814 }
1815 }
1816 return formats;
1817}
1818
6ac77bc1 1819static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1820{
1821 int formats, idx;
1822
1823 if (format != AFMT_QUERY) {
1824 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1825 if (formats < 0)
1826 return formats;
1da177e4
LT		 1827 if (!(formats & format))
1828 format = AFMT_U8;
1829 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1830 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1831 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1832 if (substream == NULL)
1833 continue;
1834 runtime = substream->runtime;
1835 if (runtime->oss.format != format) {
1836 runtime->oss.params = 1;
1837 runtime->oss.format = format;
1838 }
1839 }
1840 }
1841 return snd_pcm_oss_get_format(pcm_oss_file);
1842}
1843
6ac77bc1 1844static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1845{
6ac77bc1 1846 struct snd_pcm_substream *substream;
1da177e4
LT		 1847 int err;
1848
1849 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1850 return err;
1851 return substream->runtime->oss.format;
1852}
1853
6ac77bc1 1854static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1855{
6ac77bc1 1856 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1857
1858 if (substream == NULL)
1859 return 0;
1860 runtime = substream->runtime;
1861 if (subdivide == 0) {
1862 subdivide = runtime->oss.subdivision;
1863 if (subdivide == 0)
1864 subdivide = 1;
1865 return subdivide;
1866 }
1867 if (runtime->oss.subdivision || runtime->oss.fragshift)
1868 return -EINVAL;
1869 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1870 subdivide != 8 && subdivide != 16)
1871 return -EINVAL;
1872 runtime->oss.subdivision = subdivide;
1873 runtime->oss.params = 1;
1874 return subdivide;
1875}
1876
6ac77bc1 1877static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1878{
1879 int err = -EINVAL, idx;
1880
1881 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1882 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1883 if (substream == NULL)
1884 continue;
1885 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1886 return err;
1887 }
1888 return err;
1889}
1890
6ac77bc1 1891static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1892{
6ac77bc1 1893 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1894
1895 if (substream == NULL)
1896 return 0;
1897 runtime = substream->runtime;
1898 if (runtime->oss.subdivision || runtime->oss.fragshift)
1899 return -EINVAL;
1900 runtime->oss.fragshift = val & 0xffff;
1901 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1902 if (runtime->oss.fragshift < 4) /* < 16 */
1903 runtime->oss.fragshift = 4;
1904 if (runtime->oss.maxfrags < 2)
1905 runtime->oss.maxfrags = 2;
1906 runtime->oss.params = 1;
1907 return 0;
1908}
1909
6ac77bc1 1910static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1911{
1912 int err = -EINVAL, idx;
1913
1914 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1915 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1916 if (substream == NULL)
1917 continue;
1918 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1919 return err;
1920 }
1921 return err;
1922}
1923
1924static int snd_pcm_oss_nonblock(struct file * file)
1925{
db1dd4d3 1926 spin_lock(&file->f_lock);
1da177e4 1927 file->f_flags |= O_NONBLOCK;
db1dd4d3 1928 spin_unlock(&file->f_lock);
1da177e4
LT		 1929 return 0;
1930}
1931
6ac77bc1 1932static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1933{
1934
1935 if (substream == NULL) {
1936 res &= ~DSP_CAP_DUPLEX;
1937 return res;
1938 }
1939#ifdef DSP_CAP_MULTI
1940 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1941 if (substream->pstr->substream_count > 1)
1942 res |= DSP_CAP_MULTI;
1943#endif
1944 /* DSP_CAP_REALTIME is set all times: */
1945 /* all ALSA drivers can return actual pointer in ring buffer */
1946#if defined(DSP_CAP_REALTIME) && 0
1947 {
6ac77bc1 1948 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1949 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1950 res &= ~DSP_CAP_REALTIME;
1951 }
1952#endif
1953 return res;
1954}
1955
6ac77bc1 1956static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1957{
1958 int result, idx;
1959
1960 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1961 for (idx = 0; idx < 2; idx++) {
6ac77bc1 1962 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1963 result = snd_pcm_oss_get_caps1(substream, result);
1964 }
1965 result |= 0x0001; /* revision - same as SB AWE 64 */
1966 return result;
1967}
1968
f240406b
JK		 1969static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1970 snd_pcm_uframes_t hw_ptr)
1da177e4 1971{
6ac77bc1 1972 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1973 snd_pcm_uframes_t appl_ptr;
1974 appl_ptr = hw_ptr + runtime->buffer_size;
1975 appl_ptr %= runtime->boundary;
1976 runtime->control->appl_ptr = appl_ptr;
1977}
1978
6ac77bc1 1979static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 1980{
6ac77bc1
TI		 1981 struct snd_pcm_runtime *runtime;
1982 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 1983 int err, cmd;
1984
1985#ifdef OSS_DEBUG
006de267 1986 printk(KERN_DEBUG "pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 1987#endif
1988
1989 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1990 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1991
1992 if (psubstream) {
1993 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1994 return err;
1995 }
1996 if (csubstream) {
1997 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1998 return err;
1999 }
2000 if (psubstream) {
2001 runtime = psubstream->runtime;
2002 if (trigger & PCM_ENABLE_OUTPUT) {
2003 if (runtime->oss.trigger)
2004 goto _skip1;
9c323fcb 2005 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 2006 snd_pcm_oss_simulate_fill(psubstream,
2007 get_hw_ptr_period(runtime));
1da177e4
LT		 2008 runtime->oss.trigger = 1;
2009 runtime->start_threshold = 1;
2010 cmd = SNDRV_PCM_IOCTL_START;
2011 } else {
2012 if (!runtime->oss.trigger)
2013 goto _skip1;
2014 runtime->oss.trigger = 0;
2015 runtime->start_threshold = runtime->boundary;
2016 cmd = SNDRV_PCM_IOCTL_DROP;
2017 runtime->oss.prepare = 1;
2018 }
bf1bbb5a 2019 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1da177e4
LT		 2020 if (err < 0)
2021 return err;
2022 }
2023 _skip1:
2024 if (csubstream) {
2025 runtime = csubstream->runtime;
2026 if (trigger & PCM_ENABLE_INPUT) {
2027 if (runtime->oss.trigger)
2028 goto _skip2;
2029 runtime->oss.trigger = 1;
2030 runtime->start_threshold = 1;
2031 cmd = SNDRV_PCM_IOCTL_START;
2032 } else {
2033 if (!runtime->oss.trigger)
2034 goto _skip2;
2035 runtime->oss.trigger = 0;
2036 runtime->start_threshold = runtime->boundary;
2037 cmd = SNDRV_PCM_IOCTL_DROP;
2038 runtime->oss.prepare = 1;
2039 }
bf1bbb5a 2040 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1da177e4
LT		 2041 if (err < 0)
2042 return err;
2043 }
2044 _skip2:
2045 return 0;
2046}
2047
6ac77bc1 2048static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2049{
6ac77bc1 2050 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2051 int result = 0;
2052
2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2055 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2056 result |= PCM_ENABLE_OUTPUT;
2057 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2058 result |= PCM_ENABLE_INPUT;
2059 return result;
2060}
2061
6ac77bc1 2062static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2063{
6ac77bc1
TI		 2064 struct snd_pcm_substream *substream;
2065 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2066 snd_pcm_sframes_t delay;
2067 int err;
2068
2069 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2070 if (substream == NULL)
2071 return -EINVAL;
2072 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2073 return err;
2074 runtime = substream->runtime;
2075 if (runtime->oss.params || runtime->oss.prepare)
2076 return 0;
bf1bbb5a 2077 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 2078 if (err == -EPIPE)
2079 delay = 0; /* hack for broken OSS applications */
2080 else if (err < 0)
2081 return err;
2082 return snd_pcm_oss_bytes(substream, delay);
2083}
2084
6ac77bc1 2085static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2086{
6ac77bc1
TI		 2087 struct snd_pcm_substream *substream;
2088 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2089 snd_pcm_sframes_t delay;
2090 int fixup;
2091 struct count_info info;
2092 int err;
2093
2094 if (_info == NULL)
2095 return -EFAULT;
2096 substream = pcm_oss_file->streams[stream];
2097 if (substream == NULL)
2098 return -EINVAL;
2099 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2100 return err;
2101 runtime = substream->runtime;
2102 if (runtime->oss.params || runtime->oss.prepare) {
2103 memset(&info, 0, sizeof(info));
2104 if (copy_to_user(_info, &info, sizeof(info)))
2105 return -EFAULT;
2106 return 0;
2107 }
2108 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2110 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2111 err = 0;
2112 delay = 0;
2113 fixup = 0;
2114 } else {
2115 fixup = runtime->oss.buffer_used;
2116 }
2117 } else {
2118 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2119 fixup = -runtime->oss.buffer_used;
2120 }
2121 if (err < 0)
2122 return err;
2123 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
9c323fcb 2124 if (atomic_read(&substream->mmap_count)) {
1da177e4 2125 snd_pcm_sframes_t n;
f240406b
JK		 2126 delay = get_hw_ptr_period(runtime);
2127 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2128 if (n < 0)
2129 n += runtime->boundary;
2130 info.blocks = n / runtime->period_size;
f240406b 2131 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 2132 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2133 snd_pcm_oss_simulate_fill(substream, delay);
2134 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2135 } else {
5ac0fab9 2136 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2137 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2138 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2139 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2140 else
2141 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2142 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2143 } else {
5ac0fab9
JK		 2144 delay += fixup;
2145 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2146 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2147 }
1da177e4
LT		 2148 }
2149 if (copy_to_user(_info, &info, sizeof(info)))
2150 return -EFAULT;
2151 return 0;
2152}
2153
6ac77bc1 2154static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2155{
6ac77bc1
TI		 2156 struct snd_pcm_substream *substream;
2157 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2158 snd_pcm_sframes_t avail;
2159 int fixup;
2160 struct audio_buf_info info;
2161 int err;
2162
2163 if (_info == NULL)
2164 return -EFAULT;
2165 substream = pcm_oss_file->streams[stream];
2166 if (substream == NULL)
2167 return -EINVAL;
2168 runtime = substream->runtime;
2169
2170 if (runtime->oss.params &&
2171 (err = snd_pcm_oss_change_params(substream)) < 0)
2172 return err;
2173
2174 info.fragsize = runtime->oss.period_bytes;
2175 info.fragstotal = runtime->periods;
2176 if (runtime->oss.prepare) {
2177 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2178 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2179 info.fragments = runtime->oss.periods;
2180 } else {
2181 info.bytes = 0;
2182 info.fragments = 0;
2183 }
2184 } else {
2185 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2186 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2187 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2188 avail = runtime->buffer_size;
2189 err = 0;
2190 fixup = 0;
2191 } else {
2192 avail = runtime->buffer_size - avail;
2193 fixup = -runtime->oss.buffer_used;
2194 }
2195 } else {
2196 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2197 fixup = runtime->oss.buffer_used;
2198 }
2199 if (err < 0)
2200 return err;
2201 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2202 info.fragments = info.bytes / runtime->oss.period_bytes;
2203 }
2204
2205#ifdef OSS_DEBUG
006de267
TI		 2206 printk(KERN_DEBUG "pcm_oss: space: bytes = %i, fragments = %i, "
2207 "fragstotal = %i, fragsize = %i\n",
2208 info.bytes, info.fragments, info.fragstotal, info.fragsize);
1da177e4
LT		 2209#endif
2210 if (copy_to_user(_info, &info, sizeof(info)))
2211 return -EFAULT;
2212 return 0;
2213}
2214
6ac77bc1 2215static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2216{
2217 // it won't be probably implemented
2218 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
2219 return -EINVAL;
2220}
2221
060d77b9 2222static const char *strip_task_path(const char *path)
1da177e4 2223{
060d77b9
TI		 2224 const char *ptr, *ptrl = NULL;
2225 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2226 if (*ptr == '/')
2227 ptrl = ptr + 1;
1da177e4 2228 }
060d77b9
TI		 2229 return ptrl;
2230}
2231
2232static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2233 const char *task_name,
2234 struct snd_pcm_oss_setup *rsetup)
2235{
2236 struct snd_pcm_oss_setup *setup;
2237
2238 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2239 do {
2240 for (setup = pcm->streams[stream].oss.setup_list; setup;
2241 setup = setup->next) {
2242 if (!strcmp(setup->task_name, task_name))
2243 goto out;
1da177e4 2244 }
060d77b9
TI		 2245 } while ((task_name = strip_task_path(task_name)) != NULL);
2246 out:
2247 if (setup)
2248 *rsetup = *setup;
1a60d4c5 2249 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 2250}
2251
3bf75f9b
TI		 2252static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2253{
2254 struct snd_pcm_runtime *runtime;
2255 runtime = substream->runtime;
2256 vfree(runtime->oss.buffer);
2257 runtime->oss.buffer = NULL;
2258#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2259 snd_pcm_oss_plugin_clear(substream);
2260#endif
2261 substream->oss.oss = 0;
2262}
2263
6ac77bc1
TI		 2264static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2265 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2266 int minor)
2267{
6ac77bc1 2268 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2269
2270 substream->oss.oss = 1;
060d77b9 2271 substream->oss.setup = *setup;
3bf75f9b 2272 if (setup->nonblock)
0df63e44 2273 substream->f_flags |= O_NONBLOCK;
1576274d 2274 else if (setup->block)
0df63e44 2275 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2276 runtime = substream->runtime;
2277 runtime->oss.params = 1;
2278 runtime->oss.trigger = 1;
2279 runtime->oss.rate = 8000;
e3a5d59a 2280 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 2281 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2282 case SNDRV_MINOR_OSS_PCM_8:
2283 runtime->oss.format = AFMT_U8;
2284 break;
2285 case SNDRV_MINOR_OSS_PCM_16:
2286 runtime->oss.format = AFMT_S16_LE;
2287 break;
2288 default:
2289 runtime->oss.format = AFMT_MU_LAW;
2290 }
2291 runtime->oss.channels = 1;
2292 runtime->oss.fragshift = 0;
2293 runtime->oss.maxfrags = 0;
2294 runtime->oss.subdivision = 0;
3bf75f9b 2295 substream->pcm_release = snd_pcm_oss_release_substream;
1da177e4
LT		 2296}
2297
6ac77bc1 2298static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2299{
2300 int cidx;
7eaa943c
TI		 2301 if (!pcm_oss_file)
2302 return 0;
1da177e4 2303 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2304 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2305 if (substream)
2306 snd_pcm_release_substream(substream);
1da177e4
LT		 2307 }
2308 kfree(pcm_oss_file);
2309 return 0;
2310}
2311
2312static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2313 struct snd_pcm *pcm,
2314 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2315 int minor,
060d77b9 2316 struct snd_pcm_oss_setup *setup)
1da177e4 2317{
3bf75f9b 2318 int idx, err;
6ac77bc1 2319 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2320 struct snd_pcm_substream *substream;
aeb5d727 2321 fmode_t f_mode = file->f_mode;
1da177e4 2322
7eaa943c
TI		 2323 if (rpcm_oss_file)
2324 *rpcm_oss_file = NULL;
1da177e4 2325
ca2c0966 2326 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 2327 if (pcm_oss_file == NULL)
2328 return -ENOMEM;
2329
2330 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2331 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2332 f_mode = FMODE_WRITE;
3bf75f9b 2333
0df63e44 2334 file->f_flags &= ~O_APPEND;
3bf75f9b 2335 for (idx = 0; idx < 2; idx++) {
060d77b9 2336 if (setup[idx].disable)
3bf75f9b 2337 continue;
6cb53e7e
TI		 2338 if (! pcm->streams[idx].substream_count)
2339 continue; /* no matching substream */
3bf75f9b
TI		 2340 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2341 if (! (f_mode & FMODE_WRITE))
2342 continue;
2343 } else {
2344 if (! (f_mode & FMODE_READ))
2345 continue;
2346 }
2347 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2348 if (err < 0) {
1da177e4
LT		 2349 snd_pcm_oss_release_file(pcm_oss_file);
2350 return err;
2351 }
3bf75f9b
TI		 2352
2353 pcm_oss_file->streams[idx] = substream;
1576274d 2354 substream->file = pcm_oss_file;
060d77b9 2355 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2356 }
2357
bbdc1b7d 2358 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2359 snd_pcm_oss_release_file(pcm_oss_file);
2360 return -EINVAL;
2361 }
1da177e4
LT		 2362
2363 file->private_data = pcm_oss_file;
7eaa943c
TI		 2364 if (rpcm_oss_file)
2365 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2366 return 0;
2367}
2368
2369
93f2e378
TI		 2370static int snd_task_name(struct task_struct *task, char *name, size_t size)
2371{
2372 unsigned int idx;
2373
7eaa943c
TI		 2374 if (snd_BUG_ON(!task || !name || size < 2))
2375 return -EINVAL;
93f2e378
TI		 2376 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2377 name[idx] = task->comm[idx];
2378 name[idx] = '\0';
2379 return 0;
2380}
2381
1da177e4
LT		 2382static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2383{
1da177e4
LT		 2384 int err;
2385 char task_name[32];
6ac77bc1
TI		 2386 struct snd_pcm *pcm;
2387 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2388 struct snd_pcm_oss_setup setup[2];
1da177e4
LT		 2389 int nonblock;
2390 wait_queue_t wait;
2391
02f4865f
TI		 2392 err = nonseekable_open(inode, file);
2393 if (err < 0)
2394 return err;
2395
f87135f5
CL		 2396 pcm = snd_lookup_oss_minor_data(iminor(inode),
2397 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 2398 if (pcm == NULL) {
2399 err = -ENODEV;
2400 goto __error1;
2401 }
2402 err = snd_card_file_add(pcm->card, file);
2403 if (err < 0)
2404 goto __error1;
2405 if (!try_module_get(pcm->card->module)) {
2406 err = -EFAULT;
2407 goto __error2;
2408 }
2409 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2410 err = -EFAULT;
2411 goto __error;
2412 }
1576274d 2413 memset(setup, 0, sizeof(setup));
1da177e4 2414 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2415 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2416 task_name, &setup[0]);
1da177e4 2417 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2418 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2419 task_name, &setup[1]);
1da177e4
LT		 2420
2421 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2422 if (!nonblock)
2423 nonblock = nonblock_open;
2424
2425 init_waitqueue_entry(&wait, current);
2426 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2427 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2428 while (1) {
2429 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2430 iminor(inode), setup);
1da177e4
LT		 2431 if (err >= 0)
2432 break;
2433 if (err == -EAGAIN) {
2434 if (nonblock) {
2435 err = -EBUSY;
2436 break;
2437 }
2438 } else
2439 break;
2440 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2441 mutex_unlock(&pcm->open_mutex);
1da177e4 2442 schedule();
1a60d4c5 2443 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2444 if (signal_pending(current)) {
2445 err = -ERESTARTSYS;
2446 break;
2447 }
2448 }
2449 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2450 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2451 if (err < 0)
2452 goto __error;
2453 return err;
2454
2455 __error:
2456 module_put(pcm->card->module);
2457 __error2:
2458 snd_card_file_remove(pcm->card, file);
2459 __error1:
2460 return err;
2461}
2462
2463static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2464{
6ac77bc1
TI		 2465 struct snd_pcm *pcm;
2466 struct snd_pcm_substream *substream;
2467 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2468
2469 pcm_oss_file = file->private_data;
2470 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2471 if (substream == NULL)
2472 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
7eaa943c
TI		 2473 if (snd_BUG_ON(!substream))
2474 return -ENXIO;
1da177e4 2475 pcm = substream->pcm;
de1b8b93
TI		 2476 if (!pcm->card->shutdown)
2477 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2478 mutex_lock(&pcm->open_mutex);
1da177e4 2479 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2480 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2481 wake_up(&pcm->open_wait);
2482 module_put(pcm->card->module);
2483 snd_card_file_remove(pcm->card, file);
2484 return 0;
2485}
2486
2487static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2488{
6ac77bc1 2489 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2490 int __user *p = (int __user *)arg;
2491 int res;
2492
2493 pcm_oss_file = file->private_data;
2494 if (cmd == OSS_GETVERSION)
2495 return put_user(SNDRV_OSS_VERSION, p);
2496 if (cmd == OSS_ALSAEMULVER)
2497 return put_user(1, p);
2498#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2499 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2500 struct snd_pcm_substream *substream;
1da177e4
LT		 2501 int idx;
2502 for (idx = 0; idx < 2; ++idx) {
2503 substream = pcm_oss_file->streams[idx];
2504 if (substream != NULL)
2505 break;
2506 }
7eaa943c
TI		 2507 if (snd_BUG_ON(idx >= 2))
2508 return -ENXIO;
1da177e4
LT		 2509 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2510 }
2511#endif
2512 if (((cmd >> 8) & 0xff) != 'P')
2513 return -EINVAL;
2514#ifdef OSS_DEBUG
006de267 2515 printk(KERN_DEBUG "pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 2516#endif
2517 switch (cmd) {
2518 case SNDCTL_DSP_RESET:
2519 return snd_pcm_oss_reset(pcm_oss_file);
2520 case SNDCTL_DSP_SYNC:
2521 return snd_pcm_oss_sync(pcm_oss_file);
2522 case SNDCTL_DSP_SPEED:
2523 if (get_user(res, p))
2524 return -EFAULT;
2525 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2526 return res;
2527 return put_user(res, p);
2528 case SOUND_PCM_READ_RATE:
2529 res = snd_pcm_oss_get_rate(pcm_oss_file);
2530 if (res < 0)
2531 return res;
2532 return put_user(res, p);
2533 case SNDCTL_DSP_STEREO:
2534 if (get_user(res, p))
2535 return -EFAULT;
2536 res = res > 0 ? 2 : 1;
2537 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2538 return res;
2539 return put_user(--res, p);
2540 case SNDCTL_DSP_GETBLKSIZE:
2541 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2542 if (res < 0)
2543 return res;
2544 return put_user(res, p);
2545 case SNDCTL_DSP_SETFMT:
2546 if (get_user(res, p))
2547 return -EFAULT;
2548 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2549 if (res < 0)
2550 return res;
2551 return put_user(res, p);
2552 case SOUND_PCM_READ_BITS:
2553 res = snd_pcm_oss_get_format(pcm_oss_file);
2554 if (res < 0)
2555 return res;
2556 return put_user(res, p);
2557 case SNDCTL_DSP_CHANNELS:
2558 if (get_user(res, p))
2559 return -EFAULT;
2560 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2561 if (res < 0)
2562 return res;
2563 return put_user(res, p);
2564 case SOUND_PCM_READ_CHANNELS:
2565 res = snd_pcm_oss_get_channels(pcm_oss_file);
2566 if (res < 0)
2567 return res;
2568 return put_user(res, p);
2569 case SOUND_PCM_WRITE_FILTER:
2570 case SOUND_PCM_READ_FILTER:
2571 return -EIO;
2572 case SNDCTL_DSP_POST:
2573 return snd_pcm_oss_post(pcm_oss_file);
2574 case SNDCTL_DSP_SUBDIVIDE:
2575 if (get_user(res, p))
2576 return -EFAULT;
2577 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2578 if (res < 0)
2579 return res;
2580 return put_user(res, p);
2581 case SNDCTL_DSP_SETFRAGMENT:
2582 if (get_user(res, p))
2583 return -EFAULT;
2584 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2585 case SNDCTL_DSP_GETFMTS:
2586 res = snd_pcm_oss_get_formats(pcm_oss_file);
2587 if (res < 0)
2588 return res;
2589 return put_user(res, p);
2590 case SNDCTL_DSP_GETOSPACE:
2591 case SNDCTL_DSP_GETISPACE:
2592 return snd_pcm_oss_get_space(pcm_oss_file,
2593 cmd == SNDCTL_DSP_GETISPACE ?
2594 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2595 (struct audio_buf_info __user *) arg);
2596 case SNDCTL_DSP_NONBLOCK:
2597 return snd_pcm_oss_nonblock(file);
2598 case SNDCTL_DSP_GETCAPS:
2599 res = snd_pcm_oss_get_caps(pcm_oss_file);
2600 if (res < 0)
2601 return res;
2602 return put_user(res, p);
2603 case SNDCTL_DSP_GETTRIGGER:
2604 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2605 if (res < 0)
2606 return res;
2607 return put_user(res, p);
2608 case SNDCTL_DSP_SETTRIGGER:
2609 if (get_user(res, p))
2610 return -EFAULT;
2611 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2612 case SNDCTL_DSP_GETIPTR:
2613 case SNDCTL_DSP_GETOPTR:
2614 return snd_pcm_oss_get_ptr(pcm_oss_file,
2615 cmd == SNDCTL_DSP_GETIPTR ?
2616 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2617 (struct count_info __user *) arg);
2618 case SNDCTL_DSP_MAPINBUF:
2619 case SNDCTL_DSP_MAPOUTBUF:
2620 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2621 cmd == SNDCTL_DSP_MAPINBUF ?
2622 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2623 (struct buffmem_desc __user *) arg);
2624 case SNDCTL_DSP_SETSYNCRO:
2625 /* stop DMA now.. */
2626 return 0;
2627 case SNDCTL_DSP_SETDUPLEX:
2628 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2629 return 0;
2630 return -EIO;
2631 case SNDCTL_DSP_GETODELAY:
2632 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2633 if (res < 0) {
2634 /* it's for sure, some broken apps don't check for error codes */
2635 put_user(0, p);
2636 return res;
2637 }
2638 return put_user(res, p);
2639 case SNDCTL_DSP_PROFILE:
2640 return 0; /* silently ignore */
2641 default:
2642 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2643 }
2644 return -EINVAL;
2645}
2646
2647#ifdef CONFIG_COMPAT
2648/* all compatible */
2649#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
2650#else
2651#define snd_pcm_oss_ioctl_compat NULL
2652#endif
2653
2654static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2655{
6ac77bc1
TI		 2656 struct snd_pcm_oss_file *pcm_oss_file;
2657 struct snd_pcm_substream *substream;
1da177e4
LT		 2658
2659 pcm_oss_file = file->private_data;
2660 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2661 if (substream == NULL)
2662 return -ENXIO;
0df63e44 2663 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 2664#ifndef OSS_DEBUG
2665 return snd_pcm_oss_read1(substream, buf, count);
2666#else
2667 {
2668 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
006de267
TI		 2669 printk(KERN_DEBUG "pcm_oss: read %li bytes "
2670 "(returned %li bytes)\n", (long)count, (long)res);
1da177e4
LT		 2671 return res;
2672 }
2673#endif
2674}
2675
2676static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2677{
6ac77bc1
TI		 2678 struct snd_pcm_oss_file *pcm_oss_file;
2679 struct snd_pcm_substream *substream;
1da177e4
LT		 2680 long result;
2681
2682 pcm_oss_file = file->private_data;
2683 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2684 if (substream == NULL)
2685 return -ENXIO;
0df63e44 2686 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2687 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2688#ifdef OSS_DEBUG
006de267
TI		 2689 printk(KERN_DEBUG "pcm_oss: write %li bytes (wrote %li bytes)\n",
2690 (long)count, (long)result);
1da177e4
LT		 2691#endif
2692 return result;
2693}
2694
6ac77bc1 2695static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2696{
6ac77bc1 2697 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2698 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2699 return runtime->oss.prev_hw_ptr_period !=
2700 get_hw_ptr_period(runtime);
1da177e4 2701 else
f240406b
JK		 2702 return snd_pcm_playback_avail(runtime) >=
2703 runtime->oss.period_frames;
1da177e4
LT		 2704}
2705
6ac77bc1 2706static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2707{
6ac77bc1 2708 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2709 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2710 return runtime->oss.prev_hw_ptr_period !=
2711 get_hw_ptr_period(runtime);
1da177e4 2712 else
f240406b
JK		 2713 return snd_pcm_capture_avail(runtime) >=
2714 runtime->oss.period_frames;
1da177e4
LT		 2715}
2716
2717static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2718{
6ac77bc1 2719 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4 2720 unsigned int mask;
6ac77bc1 2721 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2722
2723 pcm_oss_file = file->private_data;
2724
2725 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2726 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2727
2728 mask = 0;
2729 if (psubstream != NULL) {
6ac77bc1 2730 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2731 poll_wait(file, &runtime->sleep, wait);
2732 snd_pcm_stream_lock_irq(psubstream);
2733 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2734 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2735 snd_pcm_oss_playback_ready(psubstream)))
2736 mask |= POLLOUT | POLLWRNORM;
2737 snd_pcm_stream_unlock_irq(psubstream);
2738 }
2739 if (csubstream != NULL) {
6ac77bc1
TI		 2740 struct snd_pcm_runtime *runtime = csubstream->runtime;
2741 snd_pcm_state_t ostate;
1da177e4
LT		 2742 poll_wait(file, &runtime->sleep, wait);
2743 snd_pcm_stream_lock_irq(csubstream);
2744 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2745 snd_pcm_oss_capture_ready(csubstream))
2746 mask |= POLLIN | POLLRDNORM;
2747 snd_pcm_stream_unlock_irq(csubstream);
2748 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2749 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2750 memset(&ofile, 0, sizeof(ofile));
2751 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2752 runtime->oss.trigger = 0;
2753 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2754 }
2755 }
2756
2757 return mask;
2758}
2759
2760static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2761{
6ac77bc1
TI		 2762 struct snd_pcm_oss_file *pcm_oss_file;
2763 struct snd_pcm_substream *substream = NULL;
2764 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2765 int err;
2766
2767#ifdef OSS_DEBUG
006de267 2768 printk(KERN_DEBUG "pcm_oss: mmap begin\n");
1da177e4
LT		 2769#endif
2770 pcm_oss_file = file->private_data;
2771 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2772 case VM_READ | VM_WRITE:
2773 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2774 if (substream)
2775 break;
2776 /* Fall through */
2777 case VM_READ:
2778 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2779 break;
2780 case VM_WRITE:
2781 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2782 break;
2783 default:
2784 return -EINVAL;
2785 }
2786 /* set VM_READ access as well to fix memset() routines that do
2787 reads before writes (to improve performance) */
2788 area->vm_flags |= VM_READ;
2789 if (substream == NULL)
2790 return -ENXIO;
2791 runtime = substream->runtime;
2792 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2793 return -EIO;
2794 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2795 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2796 else
2797 return -EIO;
2798
2799 if (runtime->oss.params) {
2800 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2801 return err;
2802 }
21a3479a 2803#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2804 if (runtime->oss.plugin_first != NULL)
2805 return -EIO;
21a3479a 2806#endif
1da177e4
LT		 2807
2808 if (area->vm_pgoff != 0)
2809 return -EINVAL;
2810
2811 err = snd_pcm_mmap_data(substream, file, area);
2812 if (err < 0)
2813 return err;
2814 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2815 runtime->silence_threshold = 0;
2816 runtime->silence_size = 0;
2817#ifdef OSS_DEBUG
006de267
TI		 2818 printk(KERN_DEBUG "pcm_oss: mmap ok, bytes = 0x%x\n",
2819 runtime->oss.mmap_bytes);
1da177e4
LT		 2820#endif
2821 /* In mmap mode we never stop */
2822 runtime->stop_threshold = runtime->boundary;
2823
2824 return 0;
2825}
2826
b7d90a35 2827#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2828/*
2829 * /proc interface
2830 */
2831
6ac77bc1
TI		 2832static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2833 struct snd_info_buffer *buffer)
1da177e4 2834{
6ac77bc1
TI		 2835 struct snd_pcm_str *pstr = entry->private_data;
2836 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2837 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2838 while (setup) {
2839 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2840 setup->task_name,
2841 setup->periods,
2842 setup->period_size,
2843 setup->disable ? " disable" : "",
2844 setup->direct ? " direct" : "",
2845 setup->block ? " block" : "",
2846 setup->nonblock ? " non-block" : "",
2847 setup->partialfrag ? " partial-frag" : "",
2848 setup->nosilence ? " no-silence" : "");
2849 setup = setup->next;
2850 }
1a60d4c5 2851 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2852}
2853
6ac77bc1 2854static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2855{
6ac77bc1 2856 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2857
1da177e4
LT		 2858 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2859 setup; setup = setupn) {
2860 setupn = setup->next;
2861 kfree(setup->task_name);
2862 kfree(setup);
2863 }
2864 pstr->oss.setup_list = NULL;
2865}
2866
6ac77bc1
TI		 2867static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2868 struct snd_info_buffer *buffer)
1da177e4 2869{
6ac77bc1 2870 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2871 char line[128], str[32], task_name[32];
2872 const char *ptr;
1da177e4 2873 int idx1;
6ac77bc1 2874 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2875
2876 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2877 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2878 memset(&template, 0, sizeof(template));
2879 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2880 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2881 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2882 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2883 continue;
2884 }
2885 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2886 if (!strcmp(setup->task_name, task_name)) {
2887 template = *setup;
2888 break;
2889 }
2890 }
2891 ptr = snd_info_get_str(str, ptr, sizeof(str));
2892 template.periods = simple_strtoul(str, NULL, 10);
2893 ptr = snd_info_get_str(str, ptr, sizeof(str));
2894 template.period_size = simple_strtoul(str, NULL, 10);
2895 for (idx1 = 31; idx1 >= 0; idx1--)
2896 if (template.period_size & (1 << idx1))
2897 break;
2898 for (idx1--; idx1 >= 0; idx1--)
2899 template.period_size &= ~(1 << idx1);
2900 do {
2901 ptr = snd_info_get_str(str, ptr, sizeof(str));
2902 if (!strcmp(str, "disable")) {
2903 template.disable = 1;
2904 } else if (!strcmp(str, "direct")) {
2905 template.direct = 1;
2906 } else if (!strcmp(str, "block")) {
2907 template.block = 1;
2908 } else if (!strcmp(str, "non-block")) {
2909 template.nonblock = 1;
2910 } else if (!strcmp(str, "partial-frag")) {
2911 template.partialfrag = 1;
2912 } else if (!strcmp(str, "no-silence")) {
2913 template.nosilence = 1;
10f69f9e
TI		 2914 } else if (!strcmp(str, "buggy-ptr")) {
2915 template.buggyptr = 1;
1da177e4
LT		 2916 }
2917 } while (*str);
2918 if (setup == NULL) {
060d77b9
TI		 2919 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2920 if (! setup) {
2921 buffer->error = -ENOMEM;
91054598 2922 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9
TI		 2923 return;
2924 }
2925 if (pstr->oss.setup_list == NULL)
2926 pstr->oss.setup_list = setup;
2927 else {
2928 for (setup1 = pstr->oss.setup_list;
2929 setup1->next; setup1 = setup1->next);
2930 setup1->next = setup;
2931 }
2932 template.task_name = kstrdup(task_name, GFP_KERNEL);
2933 if (! template.task_name) {
2934 kfree(setup);
1da177e4 2935 buffer->error = -ENOMEM;
91054598 2936 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9 2937 return;
1da177e4
LT		 2938 }
2939 }
060d77b9 2940 *setup = template;
1a60d4c5 2941 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2942 }
2943}
2944
6ac77bc1 2945static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 2946{
2947 int stream;
2948 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 2949 struct snd_info_entry *entry;
2950 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 2951 if (pstr->substream_count == 0)
2952 continue;
2953 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2954 entry->content = SNDRV_INFO_CONTENT_TEXT;
2955 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
1da177e4 2956 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 2957 entry->c.text.write = snd_pcm_oss_proc_write;
2958 entry->private_data = pstr;
2959 if (snd_info_register(entry) < 0) {
2960 snd_info_free_entry(entry);
2961 entry = NULL;
2962 }
2963 }
2964 pstr->oss.proc_entry = entry;
2965 }
2966}
2967
6ac77bc1 2968static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 2969{
2970 int stream;
2971 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 2972 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 2973 snd_info_free_entry(pstr->oss.proc_entry);
2974 pstr->oss.proc_entry = NULL;
2975 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 2976 }
2977}
b7d90a35 2978#else /* !CONFIG_SND_VERBOSE_PROCFS */
04f141a8
TI		 2979#define snd_pcm_oss_proc_init(pcm)
2980#define snd_pcm_oss_proc_done(pcm)
b7d90a35 2981#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 2982
2983/*
2984 * ENTRY functions
2985 */
2986
9c2e08c5 2987static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 2988{
2989 .owner = THIS_MODULE,
2990 .read = snd_pcm_oss_read,
2991 .write = snd_pcm_oss_write,
2992 .open = snd_pcm_oss_open,
2993 .release = snd_pcm_oss_release,
02f4865f 2994 .llseek = no_llseek,
1da177e4
LT		 2995 .poll = snd_pcm_oss_poll,
2996 .unlocked_ioctl = snd_pcm_oss_ioctl,
2997 .compat_ioctl = snd_pcm_oss_ioctl_compat,
2998 .mmap = snd_pcm_oss_mmap,
2999};
3000
6ac77bc1 3001static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4
LT		 3002{
3003 char name[128];
3004 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
3005 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 3006 pcm->card, index, &snd_pcm_oss_f_reg,
f87135f5 3007 pcm, name) < 0) {
d3d579f8
TI		 3008 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
3009 pcm->card->number, pcm->device);
1da177e4
LT		 3010 }
3011}
3012
6ac77bc1 3013static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 3014{
3015 pcm->oss.reg = 0;
896e6cc2 3016 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3017 char name[128];
3018 int duplex;
3019 register_oss_dsp(pcm, 0);
3020 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3021 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3022 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3023 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3024#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3025 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3026 pcm->card->number,
3027 name);
3028#endif
3029 pcm->oss.reg++;
3030 pcm->oss.reg_mask |= 1;
3031 }
896e6cc2 3032 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3033 register_oss_dsp(pcm, 1);
3034 pcm->oss.reg++;
3035 pcm->oss.reg_mask |= 2;
3036 }
3037
3038 if (pcm->oss.reg)
3039 snd_pcm_oss_proc_init(pcm);
3040
3041 return 0;
3042}
3043
6ac77bc1 3044static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3045{
3046 if (pcm->oss.reg) {
3047 if (pcm->oss.reg_mask & 1) {
3048 pcm->oss.reg_mask &= ~1;
3049 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3050 pcm->card, 0);
3051 }
3052 if (pcm->oss.reg_mask & 2) {
3053 pcm->oss.reg_mask &= ~2;
3054 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3055 pcm->card, 1);
3056 }
896e6cc2 3057 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3058#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3059 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3060#endif
3061 }
3062 pcm->oss.reg = 0;
1da177e4
LT		 3063 }
3064 return 0;
3065}
3066
c461482c
TI		 3067static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3068{
3069 snd_pcm_oss_disconnect_minor(pcm);
3070 snd_pcm_oss_proc_done(pcm);
3071 return 0;
3072}
3073
6ac77bc1 3074static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3075{
3076 .n_register = snd_pcm_oss_register_minor,
3077 .n_disconnect = snd_pcm_oss_disconnect_minor,
3078 .n_unregister = snd_pcm_oss_unregister_minor,
3079};
3080
3081static int __init alsa_pcm_oss_init(void)
3082{
3083 int i;
3084 int err;
3085
3086 /* check device map table */
3087 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3088 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
d3d579f8
TI		 3089 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
3090 i, dsp_map[i]);
1da177e4
LT		 3091 dsp_map[i] = 0;
3092 }
896e6cc2 3093 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
d3d579f8
TI		 3094 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
3095 i, adsp_map[i]);
1da177e4
LT		 3096 adsp_map[i] = 1;
3097 }
3098 }
3099 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3100 return err;
3101 return 0;
3102}
3103
3104static void __exit alsa_pcm_oss_exit(void)
3105{
3106 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3107}
3108
3109module_init(alsa_pcm_oss_init)
3110module_exit(alsa_pcm_oss_exit)
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git