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Merge remote-tracking branches 'asoc/topic/atmel', 'asoc/topic/bcm2835' and 'asoc...
[mirror_ubuntu-bionic-kernel.git] / sound / core / oss / pcm_oss.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer / OSS compatible
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#if 0
23#define PLUGIN_DEBUG
24#endif
25#if 0
26#define OSS_DEBUG
27#endif
28
1da177e4 29#include <linux/init.h>
1da177e4
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>
83266b6b 36#include <linux/compat.h>
1da177e4
LT		 37#include <sound/core.h>
38#include <sound/minors.h>
39#include <sound/pcm.h>
40#include <sound/pcm_params.h>
41#include "pcm_plugin.h"
42#include <sound/info.h>
43#include <linux/soundcard.h>
44#include <sound/initval.h>
fea952e5 45#include <sound/mixer_oss.h>
1da177e4
LT		 46
47#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
48
6581f4e7 49static int dsp_map[SNDRV_CARDS];
1da177e4 50static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
a67ff6a5 51static bool nonblock_open = 1;
1da177e4 52
c1017a4c 53MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
1da177e4
LT		 54MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
55MODULE_LICENSE("GPL");
56module_param_array(dsp_map, int, NULL, 0444);
57MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
58module_param_array(adsp_map, int, NULL, 0444);
59MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
60module_param(nonblock_open, bool, 0644);
61MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
62MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
63MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
64
6ac77bc1
TI		 65static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
66static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
67static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
1da177e4
LT		 68
69static inline mm_segment_t snd_enter_user(void)
70{
71 mm_segment_t fs = get_fs();
72 set_fs(get_ds());
73 return fs;
74}
75
76static inline void snd_leave_user(mm_segment_t fs)
77{
78 set_fs(fs);
79}
80
e88e8ae6
TI		 81/*
82 * helper functions to process hw_params
83 */
84static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
85{
86 int changed = 0;
87 if (i->min < min) {
88 i->min = min;
89 i->openmin = openmin;
90 changed = 1;
91 } else if (i->min == min && !i->openmin && openmin) {
92 i->openmin = 1;
93 changed = 1;
94 }
95 if (i->integer) {
96 if (i->openmin) {
97 i->min++;
98 i->openmin = 0;
99 }
100 }
101 if (snd_interval_checkempty(i)) {
102 snd_interval_none(i);
103 return -EINVAL;
104 }
105 return changed;
106}
107
108static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
109{
110 int changed = 0;
111 if (i->max > max) {
112 i->max = max;
113 i->openmax = openmax;
114 changed = 1;
115 } else if (i->max == max && !i->openmax && openmax) {
116 i->openmax = 1;
117 changed = 1;
118 }
119 if (i->integer) {
120 if (i->openmax) {
121 i->max--;
122 i->openmax = 0;
123 }
124 }
125 if (snd_interval_checkempty(i)) {
126 snd_interval_none(i);
127 return -EINVAL;
128 }
129 return changed;
130}
131
132static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
133{
134 struct snd_interval t;
135 t.empty = 0;
136 t.min = t.max = val;
137 t.openmin = t.openmax = 0;
138 t.integer = 1;
139 return snd_interval_refine(i, &t);
140}
141
142/**
143 * snd_pcm_hw_param_value_min
144 * @params: the hw_params instance
145 * @var: parameter to retrieve
146 * @dir: pointer to the direction (-1,0,1) or NULL
147 *
148 * Return the minimum value for field PAR.
149 */
150static unsigned int
151snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
152 snd_pcm_hw_param_t var, int *dir)
153{
154 if (hw_is_mask(var)) {
155 if (dir)
156 *dir = 0;
157 return snd_mask_min(hw_param_mask_c(params, var));
158 }
159 if (hw_is_interval(var)) {
160 const struct snd_interval *i = hw_param_interval_c(params, var);
161 if (dir)
162 *dir = i->openmin;
163 return snd_interval_min(i);
164 }
165 return -EINVAL;
166}
167
168/**
169 * snd_pcm_hw_param_value_max
170 * @params: the hw_params instance
171 * @var: parameter to retrieve
172 * @dir: pointer to the direction (-1,0,1) or NULL
173 *
174 * Return the maximum value for field PAR.
175 */
176static unsigned int
177snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
178 snd_pcm_hw_param_t var, int *dir)
179{
180 if (hw_is_mask(var)) {
181 if (dir)
182 *dir = 0;
183 return snd_mask_max(hw_param_mask_c(params, var));
184 }
185 if (hw_is_interval(var)) {
186 const struct snd_interval *i = hw_param_interval_c(params, var);
187 if (dir)
188 *dir = - (int) i->openmax;
189 return snd_interval_max(i);
190 }
191 return -EINVAL;
192}
193
194static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
195 snd_pcm_hw_param_t var,
196 const struct snd_mask *val)
197{
198 int changed;
199 changed = snd_mask_refine(hw_param_mask(params, var), val);
200 if (changed) {
201 params->cmask |= 1 << var;
202 params->rmask |= 1 << var;
203 }
204 return changed;
205}
206
207static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
208 struct snd_pcm_hw_params *params,
209 snd_pcm_hw_param_t var,
210 const struct snd_mask *val)
211{
212 int changed = _snd_pcm_hw_param_mask(params, var, val);
213 if (changed < 0)
214 return changed;
215 if (params->rmask) {
216 int err = snd_pcm_hw_refine(pcm, params);
217 if (err < 0)
218 return err;
219 }
220 return 0;
221}
222
223static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
224 snd_pcm_hw_param_t var, unsigned int val,
225 int dir)
226{
227 int changed;
228 int open = 0;
229 if (dir) {
230 if (dir > 0) {
231 open = 1;
232 } else if (dir < 0) {
233 if (val > 0) {
234 open = 1;
235 val--;
236 }
237 }
238 }
239 if (hw_is_mask(var))
240 changed = snd_mask_refine_min(hw_param_mask(params, var),
241 val + !!open);
242 else if (hw_is_interval(var))
243 changed = snd_interval_refine_min(hw_param_interval(params, var),
244 val, open);
245 else
246 return -EINVAL;
247 if (changed) {
248 params->cmask |= 1 << var;
249 params->rmask |= 1 << var;
250 }
251 return changed;
252}
253
254/**
255 * snd_pcm_hw_param_min
256 * @pcm: PCM instance
257 * @params: the hw_params instance
258 * @var: parameter to retrieve
259 * @val: minimal value
260 * @dir: pointer to the direction (-1,0,1) or NULL
261 *
262 * Inside configuration space defined by PARAMS remove from PAR all
263 * values < VAL. Reduce configuration space accordingly.
264 * Return new minimum or -EINVAL if the configuration space is empty
265 */
266static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
267 struct snd_pcm_hw_params *params,
268 snd_pcm_hw_param_t var, unsigned int val,
269 int *dir)
270{
271 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
272 if (changed < 0)
273 return changed;
274 if (params->rmask) {
275 int err = snd_pcm_hw_refine(pcm, params);
276 if (err < 0)
277 return err;
278 }
279 return snd_pcm_hw_param_value_min(params, var, dir);
280}
281
282static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
283 snd_pcm_hw_param_t var, unsigned int val,
284 int dir)
285{
286 int changed;
287 int open = 0;
288 if (dir) {
289 if (dir < 0) {
290 open = 1;
291 } else if (dir > 0) {
292 open = 1;
293 val++;
294 }
295 }
296 if (hw_is_mask(var)) {
297 if (val == 0 && open) {
298 snd_mask_none(hw_param_mask(params, var));
299 changed = -EINVAL;
300 } else
301 changed = snd_mask_refine_max(hw_param_mask(params, var),
302 val - !!open);
303 } else if (hw_is_interval(var))
304 changed = snd_interval_refine_max(hw_param_interval(params, var),
305 val, open);
306 else
307 return -EINVAL;
308 if (changed) {
309 params->cmask |= 1 << var;
310 params->rmask |= 1 << var;
311 }
312 return changed;
313}
314
315/**
316 * snd_pcm_hw_param_max
317 * @pcm: PCM instance
318 * @params: the hw_params instance
319 * @var: parameter to retrieve
320 * @val: maximal value
321 * @dir: pointer to the direction (-1,0,1) or NULL
322 *
323 * Inside configuration space defined by PARAMS remove from PAR all
324 * values >= VAL + 1. Reduce configuration space accordingly.
325 * Return new maximum or -EINVAL if the configuration space is empty
326 */
327static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
328 struct snd_pcm_hw_params *params,
329 snd_pcm_hw_param_t var, unsigned int val,
330 int *dir)
331{
332 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
333 if (changed < 0)
334 return changed;
335 if (params->rmask) {
336 int err = snd_pcm_hw_refine(pcm, params);
337 if (err < 0)
338 return err;
339 }
340 return snd_pcm_hw_param_value_max(params, var, dir);
341}
342
343static int boundary_sub(int a, int adir,
344 int b, int bdir,
345 int *c, int *cdir)
346{
347 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
348 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
349 *c = a - b;
350 *cdir = adir - bdir;
351 if (*cdir == -2) {
352 (*c)--;
353 } else if (*cdir == 2) {
354 (*c)++;
355 }
356 return 0;
357}
358
359static int boundary_lt(unsigned int a, int adir,
360 unsigned int b, int bdir)
361{
362 if (adir < 0) {
363 a--;
364 adir = 1;
365 } else if (adir > 0)
366 adir = 1;
367 if (bdir < 0) {
368 b--;
369 bdir = 1;
370 } else if (bdir > 0)
371 bdir = 1;
372 return a < b || (a == b && adir < bdir);
373}
374
375/* Return 1 if min is nearer to best than max */
376static int boundary_nearer(int min, int mindir,
377 int best, int bestdir,
378 int max, int maxdir)
379{
380 int dmin, dmindir;
381 int dmax, dmaxdir;
382 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
383 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
384 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
385}
386
387/**
388 * snd_pcm_hw_param_near
389 * @pcm: PCM instance
390 * @params: the hw_params instance
391 * @var: parameter to retrieve
392 * @best: value to set
393 * @dir: pointer to the direction (-1,0,1) or NULL
394 *
395 * Inside configuration space defined by PARAMS set PAR to the available value
396 * nearest to VAL. Reduce configuration space accordingly.
397 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
398 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
399 * Return the value found.
400 */
401static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
402 struct snd_pcm_hw_params *params,
403 snd_pcm_hw_param_t var, unsigned int best,
404 int *dir)
405{
406 struct snd_pcm_hw_params *save = NULL;
407 int v;
408 unsigned int saved_min;
409 int last = 0;
410 int min, max;
411 int mindir, maxdir;
412 int valdir = dir ? *dir : 0;
413 /* FIXME */
414 if (best > INT_MAX)
415 best = INT_MAX;
416 min = max = best;
417 mindir = maxdir = valdir;
418 if (maxdir > 0)
419 maxdir = 0;
420 else if (maxdir == 0)
421 maxdir = -1;
422 else {
423 maxdir = 1;
424 max--;
425 }
426 save = kmalloc(sizeof(*save), GFP_KERNEL);
427 if (save == NULL)
428 return -ENOMEM;
429 *save = *params;
430 saved_min = min;
431 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
432 if (min >= 0) {
433 struct snd_pcm_hw_params *params1;
434 if (max < 0)
435 goto _end;
436 if ((unsigned int)min == saved_min && mindir == valdir)
437 goto _end;
438 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
439 if (params1 == NULL) {
440 kfree(save);
441 return -ENOMEM;
442 }
443 *params1 = *save;
444 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
445 if (max < 0) {
446 kfree(params1);
447 goto _end;
448 }
449 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
450 *params = *params1;
451 last = 1;
452 }
453 kfree(params1);
454 } else {
455 *params = *save;
456 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
3daa7ea6
JJ		 457 if (max < 0) {
458 kfree(save);
7eaa943c 459 return max;
3daa7ea6 460 }
e88e8ae6
TI		 461 last = 1;
462 }
463 _end:
464 kfree(save);
465 if (last)
466 v = snd_pcm_hw_param_last(pcm, params, var, dir);
467 else
468 v = snd_pcm_hw_param_first(pcm, params, var, dir);
7eaa943c 469 snd_BUG_ON(v < 0);
e88e8ae6
TI		 470 return v;
471}
472
473static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
474 snd_pcm_hw_param_t var, unsigned int val,
475 int dir)
476{
477 int changed;
478 if (hw_is_mask(var)) {
479 struct snd_mask *m = hw_param_mask(params, var);
480 if (val == 0 && dir < 0) {
481 changed = -EINVAL;
482 snd_mask_none(m);
483 } else {
484 if (dir > 0)
485 val++;
486 else if (dir < 0)
487 val--;
488 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
489 }
490 } else if (hw_is_interval(var)) {
491 struct snd_interval *i = hw_param_interval(params, var);
492 if (val == 0 && dir < 0) {
493 changed = -EINVAL;
494 snd_interval_none(i);
495 } else if (dir == 0)
496 changed = snd_interval_refine_set(i, val);
497 else {
498 struct snd_interval t;
499 t.openmin = 1;
500 t.openmax = 1;
501 t.empty = 0;
502 t.integer = 0;
503 if (dir < 0) {
504 t.min = val - 1;
505 t.max = val;
506 } else {
507 t.min = val;
508 t.max = val+1;
509 }
510 changed = snd_interval_refine(i, &t);
511 }
512 } else
513 return -EINVAL;
514 if (changed) {
515 params->cmask |= 1 << var;
516 params->rmask |= 1 << var;
517 }
518 return changed;
519}
520
521/**
522 * snd_pcm_hw_param_set
523 * @pcm: PCM instance
524 * @params: the hw_params instance
525 * @var: parameter to retrieve
526 * @val: value to set
527 * @dir: pointer to the direction (-1,0,1) or NULL
528 *
529 * Inside configuration space defined by PARAMS remove from PAR all
530 * values != VAL. Reduce configuration space accordingly.
531 * Return VAL or -EINVAL if the configuration space is empty
532 */
533static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
534 struct snd_pcm_hw_params *params,
535 snd_pcm_hw_param_t var, unsigned int val,
536 int dir)
537{
538 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
539 if (changed < 0)
540 return changed;
541 if (params->rmask) {
542 int err = snd_pcm_hw_refine(pcm, params);
543 if (err < 0)
544 return err;
545 }
546 return snd_pcm_hw_param_value(params, var, NULL);
547}
548
549static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
550 snd_pcm_hw_param_t var)
551{
552 int changed;
553 changed = snd_interval_setinteger(hw_param_interval(params, var));
554 if (changed) {
555 params->cmask |= 1 << var;
556 params->rmask |= 1 << var;
557 }
558 return changed;
559}
560
561/*
562 * plugin
563 */
564
21a3479a 565#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 566static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 567{
6ac77bc1
TI		 568 struct snd_pcm_runtime *runtime = substream->runtime;
569 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 570
571 plugin = runtime->oss.plugin_first;
572 while (plugin) {
573 next = plugin->next;
574 snd_pcm_plugin_free(plugin);
575 plugin = next;
576 }
577 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
578 return 0;
579}
580
6ac77bc1 581static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 582{
6ac77bc1 583 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 584 plugin->next = runtime->oss.plugin_first;
585 plugin->prev = NULL;
586 if (runtime->oss.plugin_first) {
587 runtime->oss.plugin_first->prev = plugin;
588 runtime->oss.plugin_first = plugin;
589 } else {
590 runtime->oss.plugin_last =
591 runtime->oss.plugin_first = plugin;
592 }
593 return 0;
594}
595
6ac77bc1 596int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 597{
6ac77bc1 598 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 599 plugin->next = NULL;
600 plugin->prev = runtime->oss.plugin_last;
601 if (runtime->oss.plugin_last) {
602 runtime->oss.plugin_last->next = plugin;
603 runtime->oss.plugin_last = plugin;
604 } else {
605 runtime->oss.plugin_last =
606 runtime->oss.plugin_first = plugin;
607 }
608 return 0;
609}
21a3479a 610#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 611
6ac77bc1 612static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 613{
6ac77bc1 614 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 615 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 616 long bytes = frames_to_bytes(runtime, frames);
1da177e4 617 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 618 return bytes;
cdc5c53f
TI		 619#if BITS_PER_LONG >= 64
620 return runtime->oss.buffer_bytes * bytes / buffer_size;
621#else
622 {
623 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
3f7440a6 624 return div_u64(bsize, buffer_size);
cdc5c53f
TI		 625 }
626#endif
1da177e4
LT		 627}
628
6ac77bc1 629static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 630{
6ac77bc1 631 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 632 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 633 if (buffer_size == runtime->oss.buffer_bytes)
634 return bytes_to_frames(runtime, bytes);
635 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
636}
637
f240406b
JK		 638static inline
639snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
640{
e7636925 641 return runtime->hw_ptr_interrupt;
f240406b
JK		 642}
643
24038a25
TI		 644/* define extended formats in the recent OSS versions (if any) */
645/* linear formats */
646#define AFMT_S32_LE 0x00001000
647#define AFMT_S32_BE 0x00002000
648#define AFMT_S24_LE 0x00008000
649#define AFMT_S24_BE 0x00010000
650#define AFMT_S24_PACKED 0x00040000
651
652/* other supported formats */
653#define AFMT_FLOAT 0x00004000
654#define AFMT_SPDIF_RAW 0x00020000
655
656/* unsupported formats */
657#define AFMT_AC3 0x00000400
658#define AFMT_VORBIS 0x00000800
659
fea952e5 660static snd_pcm_format_t snd_pcm_oss_format_from(int format)
1da177e4
LT		 661{
662 switch (format) {
663 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
664 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
665 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
666 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
667 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
668 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
669 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
670 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
671 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
672 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
24038a25
TI		 673 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
674 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
675 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
676 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
677 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
678 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
679 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
1da177e4
LT		 680 default: return SNDRV_PCM_FORMAT_U8;
681 }
682}
683
fea952e5 684static int snd_pcm_oss_format_to(snd_pcm_format_t format)
1da177e4
LT		 685{
686 switch (format) {
687 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
688 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
689 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
690 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
691 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
692 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
693 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
694 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
695 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
696 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
24038a25
TI		 697 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
698 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
699 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
700 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
701 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
702 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
703 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
1da177e4
LT		 704 default: return -EINVAL;
705 }
706}
707
6ac77bc1
TI		 708static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
709 struct snd_pcm_hw_params *oss_params,
710 struct snd_pcm_hw_params *slave_params)
1da177e4
LT		 711{
712 size_t s;
713 size_t oss_buffer_size, oss_period_size, oss_periods;
714 size_t min_period_size, max_period_size;
6ac77bc1 715 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 716 size_t oss_frame_size;
717
718 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
719 params_channels(oss_params) / 8;
720
721 oss_buffer_size = snd_pcm_plug_client_size(substream,
722 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
f6dbe1be 723 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
9c323fcb 724 if (atomic_read(&substream->mmap_count)) {
1da177e4
LT		 725 if (oss_buffer_size > runtime->oss.mmap_bytes)
726 oss_buffer_size = runtime->oss.mmap_bytes;
727 }
728
060d77b9
TI		 729 if (substream->oss.setup.period_size > 16)
730 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 731 else if (runtime->oss.fragshift) {
732 oss_period_size = 1 << runtime->oss.fragshift;
733 if (oss_period_size > oss_buffer_size / 2)
734 oss_period_size = oss_buffer_size / 2;
735 } else {
736 int sd;
737 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
738
739 oss_period_size = oss_buffer_size;
740 do {
741 oss_period_size /= 2;
742 } while (oss_period_size > bytes_per_sec);
743 if (runtime->oss.subdivision == 0) {
744 sd = 4;
745 if (oss_period_size / sd > 4096)
746 sd *= 2;
747 if (oss_period_size / sd < 4096)
748 sd = 1;
749 } else
750 sd = runtime->oss.subdivision;
751 oss_period_size /= sd;
752 if (oss_period_size < 16)
753 oss_period_size = 16;
754 }
755
756 min_period_size = snd_pcm_plug_client_size(substream,
757 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
758 min_period_size *= oss_frame_size;
f6dbe1be 759 min_period_size = roundup_pow_of_two(min_period_size);
1da177e4
LT		 760 if (oss_period_size < min_period_size)
761 oss_period_size = min_period_size;
762
763 max_period_size = snd_pcm_plug_client_size(substream,
764 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
765 max_period_size *= oss_frame_size;
f6dbe1be 766 max_period_size = rounddown_pow_of_two(max_period_size);
1da177e4
LT		 767 if (oss_period_size > max_period_size)
768 oss_period_size = max_period_size;
769
770 oss_periods = oss_buffer_size / oss_period_size;
771
060d77b9
TI		 772 if (substream->oss.setup.periods > 1)
773 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 774
775 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
776 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
777 s = runtime->oss.maxfrags;
778 if (oss_periods > s)
779 oss_periods = s;
780
781 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
782 if (s < 2)
783 s = 2;
784 if (oss_periods < s)
785 oss_periods = s;
786
787 while (oss_period_size * oss_periods > oss_buffer_size)
788 oss_period_size /= 2;
789
7eaa943c
TI		 790 if (oss_period_size < 16)
791 return -EINVAL;
1da177e4
LT		 792 runtime->oss.period_bytes = oss_period_size;
793 runtime->oss.period_frames = 1;
794 runtime->oss.periods = oss_periods;
795 return 0;
796}
797
6ac77bc1
TI		 798static int choose_rate(struct snd_pcm_substream *substream,
799 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 800{
6ac77bc1
TI		 801 struct snd_interval *it;
802 struct snd_pcm_hw_params *save;
1da177e4
LT		 803 unsigned int rate, prev;
804
805 save = kmalloc(sizeof(*save), GFP_KERNEL);
806 if (save == NULL)
807 return -ENOMEM;
808 *save = *params;
809 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
810
811 /* try multiples of the best rate */
812 rate = best_rate;
813 for (;;) {
814 if (it->max < rate || (it->max == rate && it->openmax))
815 break;
816 if (it->min < rate || (it->min == rate && !it->openmin)) {
817 int ret;
818 ret = snd_pcm_hw_param_set(substream, params,
819 SNDRV_PCM_HW_PARAM_RATE,
820 rate, 0);
821 if (ret == (int)rate) {
822 kfree(save);
823 return rate;
824 }
825 *params = *save;
826 }
827 prev = rate;
828 rate += best_rate;
829 if (rate <= prev)
830 break;
831 }
832
833 /* not found, use the nearest rate */
834 kfree(save);
835 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
836}
837
b2483716
TI		 838static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
839 bool trylock)
1da177e4 840{
6ac77bc1
TI		 841 struct snd_pcm_runtime *runtime = substream->runtime;
842 struct snd_pcm_hw_params *params, *sparams;
843 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 844 ssize_t oss_buffer_size, oss_period_size;
845 size_t oss_frame_size;
846 int err;
847 int direct;
fea952e5
CL		 848 snd_pcm_format_t format, sformat;
849 int n;
6ac77bc1
TI		 850 struct snd_mask sformat_mask;
851 struct snd_mask mask;
1da177e4 852
b2483716
TI		 853 if (trylock) {
854 if (!(mutex_trylock(&runtime->oss.params_lock)))
855 return -EAGAIN;
856 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
e3a5d59a 857 return -EINTR;
46325371 858 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
1da177e4
LT		 859 params = kmalloc(sizeof(*params), GFP_KERNEL);
860 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
861 if (!sw_params || !params || !sparams) {
1da177e4
LT		 862 err = -ENOMEM;
863 goto failure;
864 }
865
9c323fcb 866 if (atomic_read(&substream->mmap_count))
1da177e4 867 direct = 1;
060d77b9
TI		 868 else
869 direct = substream->oss.setup.direct;
1da177e4
LT		 870
871 _snd_pcm_hw_params_any(sparams);
872 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
873 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
874 snd_mask_none(&mask);
9c323fcb 875 if (atomic_read(&substream->mmap_count))
fea952e5 876 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 877 else {
fea952e5 878 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 879 if (!direct)
fea952e5 880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
1da177e4
LT		 881 }
882 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
883 if (err < 0) {
61efcee8 884 pcm_dbg(substream->pcm, "No usable accesses\n");
1da177e4
LT		 885 err = -EINVAL;
886 goto failure;
887 }
888 choose_rate(substream, sparams, runtime->oss.rate);
889 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
890
891 format = snd_pcm_oss_format_from(runtime->oss.format);
892
893 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
894 if (direct)
895 sformat = format;
896 else
897 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
898
fea952e5
CL		 899 if ((__force int)sformat < 0 ||
900 !snd_mask_test(&sformat_mask, (__force int)sformat)) {
901 for (sformat = (__force snd_pcm_format_t)0;
902 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
903 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
904 if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
1da177e4
LT		 905 snd_pcm_oss_format_to(sformat) >= 0)
906 break;
907 }
fea952e5 908 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
61efcee8 909 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
1da177e4
LT		 910 err = -EINVAL;
911 goto failure;
912 }
913 }
fea952e5 914 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
7eaa943c
TI		 915 if (err < 0)
916 goto failure;
1da177e4
LT		 917
918 if (direct) {
919 memcpy(params, sparams, sizeof(*params));
920 } else {
921 _snd_pcm_hw_params_any(params);
922 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
fea952e5 923 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
1da177e4 924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
fea952e5 925 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
1da177e4
LT		 926 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
927 runtime->oss.channels, 0);
928 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
929 runtime->oss.rate, 0);
930 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
931 params_access(params), params_format(params),
932 params_channels(params), params_rate(params));
933 }
934 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
935 params_access(sparams), params_format(sparams),
936 params_channels(sparams), params_rate(sparams));
937
938 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
939 params_channels(params) / 8;
940
21a3479a 941#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 942 snd_pcm_oss_plugin_clear(substream);
943 if (!direct) {
944 /* add necessary plugins */
945 snd_pcm_oss_plugin_clear(substream);
946 if ((err = snd_pcm_plug_format_plugins(substream,
947 params,
948 sparams)) < 0) {
61efcee8
TI		 949 pcm_dbg(substream->pcm,
950 "snd_pcm_plug_format_plugins failed: %i\n", err);
1da177e4
LT		 951 snd_pcm_oss_plugin_clear(substream);
952 goto failure;
953 }
954 if (runtime->oss.plugin_first) {
6ac77bc1 955 struct snd_pcm_plugin *plugin;
1da177e4 956 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
61efcee8
TI		 957 pcm_dbg(substream->pcm,
958 "snd_pcm_plugin_build_io failed: %i\n", err);
1da177e4
LT		 959 snd_pcm_oss_plugin_clear(substream);
960 goto failure;
961 }
962 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
963 err = snd_pcm_plugin_append(plugin);
964 } else {
965 err = snd_pcm_plugin_insert(plugin);
966 }
967 if (err < 0) {
968 snd_pcm_oss_plugin_clear(substream);
969 goto failure;
970 }
971 }
972 }
21a3479a 973#endif
1da177e4
LT		 974
975 err = snd_pcm_oss_period_size(substream, params, sparams);
976 if (err < 0)
977 goto failure;
978
979 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
980 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
7eaa943c
TI		 981 if (err < 0)
982 goto failure;
1da177e4
LT		 983
984 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
985 runtime->oss.periods, NULL);
7eaa943c
TI		 986 if (err < 0)
987 goto failure;
1da177e4
LT		 988
989 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
990
991 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
61efcee8 992 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
1da177e4
LT		 993 goto failure;
994 }
995
1da177e4
LT		 996 if (runtime->oss.trigger) {
997 sw_params->start_threshold = 1;
998 } else {
999 sw_params->start_threshold = runtime->boundary;
1000 }
9c323fcb
TI		 1001 if (atomic_read(&substream->mmap_count) ||
1002 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 1003 sw_params->stop_threshold = runtime->boundary;
1004 else
1005 sw_params->stop_threshold = runtime->buffer_size;
1006 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
1007 sw_params->period_step = 1;
004e6538
TI		 1008 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1009 1 : runtime->period_size;
9c323fcb 1010 if (atomic_read(&substream->mmap_count) ||
060d77b9 1011 substream->oss.setup.nosilence) {
1da177e4
LT		 1012 sw_params->silence_threshold = 0;
1013 sw_params->silence_size = 0;
1014 } else {
1015 snd_pcm_uframes_t frames;
1016 frames = runtime->period_size + 16;
1017 if (frames > runtime->buffer_size)
1018 frames = runtime->buffer_size;
1019 sw_params->silence_threshold = frames;
1020 sw_params->silence_size = frames;
1021 }
1022
1023 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
61efcee8 1024 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1da177e4
LT		 1025 goto failure;
1026 }
1027
1028 runtime->oss.periods = params_periods(sparams);
1029 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
7eaa943c
TI		 1030 if (oss_period_size < 0) {
1031 err = -EINVAL;
1032 goto failure;
1033 }
21a3479a 1034#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1035 if (runtime->oss.plugin_first) {
1036 err = snd_pcm_plug_alloc(substream, oss_period_size);
1037 if (err < 0)
1038 goto failure;
1039 }
21a3479a 1040#endif
1da177e4
LT		 1041 oss_period_size *= oss_frame_size;
1042
1043 oss_buffer_size = oss_period_size * runtime->oss.periods;
7eaa943c
TI		 1044 if (oss_buffer_size < 0) {
1045 err = -EINVAL;
1046 goto failure;
1047 }
1da177e4
LT		 1048
1049 runtime->oss.period_bytes = oss_period_size;
1050 runtime->oss.buffer_bytes = oss_buffer_size;
1051
1052 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1053 runtime->oss.period_bytes,
1054 runtime->oss.buffer_bytes);
1055 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1056 params_period_size(sparams),
1057 params_buffer_size(sparams));
1058
1059 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1060 runtime->oss.channels = params_channels(params);
1061 runtime->oss.rate = params_rate(params);
1062
1da177e4
LT		 1063 vfree(runtime->oss.buffer);
1064 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
cbbb0570
RK		 1065 if (!runtime->oss.buffer) {
1066 err = -ENOMEM;
1067 goto failure;
1068 }
1069
1070 runtime->oss.params = 0;
1071 runtime->oss.prepare = 1;
1da177e4
LT		 1072 runtime->oss.buffer_used = 0;
1073 if (runtime->dma_area)
1074 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1075
1076 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1077
1078 err = 0;
1079failure:
1080 kfree(sw_params);
1081 kfree(params);
1082 kfree(sparams);
e3a5d59a 1083 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1084 return err;
1085}
1086
6ac77bc1 1087static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1088{
1089 int idx, err;
6ac77bc1 1090 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 1091
1092 for (idx = 0; idx < 2; idx++) {
1093 substream = pcm_oss_file->streams[idx];
1094 if (substream == NULL)
1095 continue;
1096 if (asubstream == NULL)
1097 asubstream = substream;
1098 if (substream->runtime->oss.params) {
b2483716 1099 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1100 if (err < 0)
1101 return err;
1102 }
1103 }
7eaa943c
TI		 1104 if (!asubstream)
1105 return -EIO;
1da177e4
LT		 1106 if (r_substream)
1107 *r_substream = asubstream;
1108 return 0;
1109}
1110
6ac77bc1 1111static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1112{
1113 int err;
6ac77bc1 1114 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1115
1116 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1117 if (err < 0) {
61efcee8
TI		 1118 pcm_dbg(substream->pcm,
1119 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1da177e4
LT		 1120 return err;
1121 }
1122 runtime->oss.prepare = 0;
f240406b 1123 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1124 runtime->oss.period_ptr = 0;
1125 runtime->oss.buffer_used = 0;
1126
1127 return 0;
1128}
1129
6ac77bc1 1130static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1131{
6ac77bc1 1132 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1133 int err;
1134
1135 if (substream == NULL)
1136 return 0;
1137 runtime = substream->runtime;
1138 if (runtime->oss.params) {
b2483716 1139 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1140 if (err < 0)
1141 return err;
1142 }
1143 if (runtime->oss.prepare) {
1144 err = snd_pcm_oss_prepare(substream);
1145 if (err < 0)
1146 return err;
1147 }
1148 return 0;
1149}
1150
6ac77bc1 1151static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1152{
6ac77bc1 1153 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1154 snd_pcm_uframes_t frames;
1155 int err = 0;
1156
1157 while (1) {
1158 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1159 if (err < 0)
1160 break;
1161 runtime = substream->runtime;
1162 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1163 break;
1164 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1165 /* until avail(delay) <= buffer_size */
1166 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1167 frames /= runtime->period_size;
1168 frames *= runtime->period_size;
1169 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1170 if (err < 0)
1171 break;
1172 }
1173 return err;
1174}
1175
6ac77bc1 1176snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1177{
6ac77bc1 1178 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1179 int ret;
1180 while (1) {
1181 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1182 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1183#ifdef OSS_DEBUG
61efcee8
TI		 1184 pcm_dbg(substream->pcm,
1185 "pcm_oss: write: recovering from %s\n",
1186 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1187 "XRUN" : "SUSPEND");
1da177e4
LT		 1188#endif
1189 ret = snd_pcm_oss_prepare(substream);
1190 if (ret < 0)
1191 break;
1192 }
1193 if (in_kernel) {
1194 mm_segment_t fs;
1195 fs = snd_enter_user();
fea952e5 1196 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1197 snd_leave_user(fs);
1198 } else {
fea952e5 1199 ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1200 }
1201 if (ret != -EPIPE && ret != -ESTRPIPE)
1202 break;
1203 /* test, if we can't store new data, because the stream */
1204 /* has not been started */
1205 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1206 return -EAGAIN;
1207 }
1208 return ret;
1209}
1210
6ac77bc1 1211snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1212{
6ac77bc1 1213 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1214 snd_pcm_sframes_t delay;
1215 int ret;
1216 while (1) {
1217 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1218 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1219#ifdef OSS_DEBUG
61efcee8
TI		 1220 pcm_dbg(substream->pcm,
1221 "pcm_oss: read: recovering from %s\n",
1222 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1223 "XRUN" : "SUSPEND");
1da177e4
LT		 1224#endif
1225 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1226 if (ret < 0)
1227 break;
1228 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1229 ret = snd_pcm_oss_prepare(substream);
1230 if (ret < 0)
1231 break;
1232 }
1233 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1234 if (ret < 0)
1235 break;
1236 if (in_kernel) {
1237 mm_segment_t fs;
1238 fs = snd_enter_user();
fea952e5 1239 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1240 snd_leave_user(fs);
1241 } else {
fea952e5 1242 ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
1da177e4
LT		 1243 }
1244 if (ret == -EPIPE) {
1245 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1246 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1247 if (ret < 0)
1248 break;
1249 }
1250 continue;
1251 }
1252 if (ret != -ESTRPIPE)
1253 break;
1254 }
1255 return ret;
1256}
1257
6ac77bc1 1258snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1259{
6ac77bc1 1260 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1261 int ret;
1262 while (1) {
1263 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1264 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1265#ifdef OSS_DEBUG
61efcee8
TI		 1266 pcm_dbg(substream->pcm,
1267 "pcm_oss: writev: recovering from %s\n",
1268 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1269 "XRUN" : "SUSPEND");
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
61efcee8
TI		 1302 pcm_dbg(substream->pcm,
1303 "pcm_oss: readv: recovering from %s\n",
1304 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1305 "XRUN" : "SUSPEND");
1da177e4
LT		 1306#endif
1307 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1308 if (ret < 0)
1309 break;
1310 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1311 ret = snd_pcm_oss_prepare(substream);
1312 if (ret < 0)
1313 break;
1314 }
1315 if (in_kernel) {
1316 mm_segment_t fs;
1317 fs = snd_enter_user();
1318 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1319 snd_leave_user(fs);
1320 } else {
1321 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
1322 }
1323 if (ret != -EPIPE && ret != -ESTRPIPE)
1324 break;
1325 }
1326 return ret;
1327}
1328
6ac77bc1 1329static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1330{
6ac77bc1 1331 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1332 snd_pcm_sframes_t frames, frames1;
21a3479a 1333#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1334 if (runtime->oss.plugin_first) {
6ac77bc1 1335 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1336 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1337 if (!in_kernel) {
fea952e5 1338 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1da177e4
LT		 1339 return -EFAULT;
1340 buf = runtime->oss.buffer;
1341 }
1342 frames = bytes / oss_frame_bytes;
1343 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1344 if (frames1 < 0)
1345 return frames1;
1346 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1347 if (frames1 <= 0)
1348 return frames1;
1349 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 1350 } else
1351#endif
1352 {
1da177e4
LT		 1353 frames = bytes_to_frames(runtime, bytes);
1354 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1355 if (frames1 <= 0)
1356 return frames1;
1357 bytes = frames_to_bytes(runtime, frames1);
1358 }
1359 return bytes;
1360}
1361
6ac77bc1 1362static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1363{
1364 size_t xfer = 0;
1365 ssize_t tmp;
6ac77bc1 1366 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1367
9c323fcb 1368 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1369 return -ENXIO;
1370
1371 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1372 return tmp;
e3a5d59a 1373 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1374 while (bytes > 0) {
1375 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1376 tmp = bytes;
1377 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1378 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1379 if (tmp > 0) {
e3a5d59a
TI		 1380 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1381 tmp = -EFAULT;
1382 goto err;
1383 }
1da177e4
LT		 1384 }
1385 runtime->oss.buffer_used += tmp;
1386 buf += tmp;
1387 bytes -= tmp;
1388 xfer += tmp;
060d77b9 1389 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 1390 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1391 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1392 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1393 if (tmp <= 0)
e3a5d59a 1394 goto err;
1da177e4
LT		 1395 runtime->oss.bytes += tmp;
1396 runtime->oss.period_ptr += tmp;
1397 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1398 if (runtime->oss.period_ptr == 0 ||
1399 runtime->oss.period_ptr == runtime->oss.buffer_used)
1400 runtime->oss.buffer_used = 0;
e3a5d59a
TI		 1401 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1402 tmp = -EAGAIN;
1403 goto err;
1404 }
1da177e4
LT		 1405 }
1406 } else {
4d23359b
CL		 1407 tmp = snd_pcm_oss_write2(substream,
1408 (const char __force *)buf,
1409 runtime->oss.period_bytes, 0);
1da177e4 1410 if (tmp <= 0)
e3a5d59a 1411 goto err;
1da177e4
LT		 1412 runtime->oss.bytes += tmp;
1413 buf += tmp;
1414 bytes -= tmp;
1415 xfer += tmp;
0df63e44 1416 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4
LT		 1417 tmp != runtime->oss.period_bytes)
1418 break;
1419 }
1420 }
e3a5d59a 1421 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1422 return xfer;
e3a5d59a
TI		 1423
1424 err:
1425 mutex_unlock(&runtime->oss.params_lock);
1426 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1427}
1428
6ac77bc1 1429static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1430{
6ac77bc1 1431 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1432 snd_pcm_sframes_t frames, frames1;
21a3479a 1433#ifdef CONFIG_SND_PCM_OSS_PLUGINS
fea952e5 1434 char __user *final_dst = (char __force __user *)buf;
1da177e4 1435 if (runtime->oss.plugin_first) {
6ac77bc1 1436 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1437 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1438 if (!in_kernel)
1439 buf = runtime->oss.buffer;
1440 frames = bytes / oss_frame_bytes;
1441 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1442 if (frames1 < 0)
1443 return frames1;
1444 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1445 if (frames1 <= 0)
1446 return frames1;
1447 bytes = frames1 * oss_frame_bytes;
1448 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1449 return -EFAULT;
21a3479a
JK		 1450 } else
1451#endif
1452 {
1da177e4
LT		 1453 frames = bytes_to_frames(runtime, bytes);
1454 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1455 if (frames1 <= 0)
1456 return frames1;
1457 bytes = frames_to_bytes(runtime, frames1);
1458 }
1459 return bytes;
1460}
1461
6ac77bc1 1462static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1463{
1464 size_t xfer = 0;
1465 ssize_t tmp;
6ac77bc1 1466 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1467
9c323fcb 1468 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1469 return -ENXIO;
1470
1471 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
1472 return tmp;
e3a5d59a 1473 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1474 while (bytes > 0) {
1475 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1476 if (runtime->oss.buffer_used == 0) {
1477 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1478 if (tmp <= 0)
e3a5d59a 1479 goto err;
1da177e4
LT		 1480 runtime->oss.bytes += tmp;
1481 runtime->oss.period_ptr = tmp;
1482 runtime->oss.buffer_used = tmp;
1483 }
1484 tmp = bytes;
1485 if ((size_t) tmp > runtime->oss.buffer_used)
1486 tmp = runtime->oss.buffer_used;
e3a5d59a
TI		 1487 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1488 tmp = -EFAULT;
1489 goto err;
1490 }
1da177e4
LT		 1491 buf += tmp;
1492 bytes -= tmp;
1493 xfer += tmp;
1494 runtime->oss.buffer_used -= tmp;
1495 } else {
4d23359b
CL		 1496 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1497 runtime->oss.period_bytes, 0);
1da177e4 1498 if (tmp <= 0)
e3a5d59a 1499 goto err;
1da177e4
LT		 1500 runtime->oss.bytes += tmp;
1501 buf += tmp;
1502 bytes -= tmp;
1503 xfer += tmp;
1504 }
1505 }
e3a5d59a 1506 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1507 return xfer;
e3a5d59a
TI		 1508
1509 err:
1510 mutex_unlock(&runtime->oss.params_lock);
1511 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1512}
1513
6ac77bc1 1514static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1515{
6ac77bc1 1516 struct snd_pcm_substream *substream;
60686aa0
TI		 1517 struct snd_pcm_runtime *runtime;
1518 int i;
1da177e4 1519
60686aa0
TI		 1520 for (i = 0; i < 2; i++) {
1521 substream = pcm_oss_file->streams[i];
1522 if (!substream)
1523 continue;
1524 runtime = substream->runtime;
bf1bbb5a 1525 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
60686aa0
TI		 1526 runtime->oss.prepare = 1;
1527 runtime->oss.buffer_used = 0;
1528 runtime->oss.prev_hw_ptr_period = 0;
1529 runtime->oss.period_ptr = 0;
1da177e4
LT		 1530 }
1531 return 0;
1532}
1533
6ac77bc1 1534static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1535{
6ac77bc1 1536 struct snd_pcm_substream *substream;
1da177e4
LT		 1537 int err;
1538
1539 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1540 if (substream != NULL) {
1541 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1542 return err;
bf1bbb5a 1543 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 1544 }
1545 /* note: all errors from the start action are ignored */
1546 /* OSS apps do not know, how to handle them */
1547 return 0;
1548}
1549
6ac77bc1 1550static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1551{
6ac77bc1 1552 struct snd_pcm_runtime *runtime;
1da177e4 1553 ssize_t result = 0;
fea952e5 1554 snd_pcm_state_t state;
1da177e4
LT		 1555 long res;
1556 wait_queue_t wait;
1557
1558 runtime = substream->runtime;
1559 init_waitqueue_entry(&wait, current);
1560 add_wait_queue(&runtime->sleep, &wait);
1561#ifdef OSS_DEBUG
61efcee8 1562 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1da177e4
LT		 1563#endif
1564 while (1) {
1565 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1566 if (result > 0) {
1567 runtime->oss.buffer_used = 0;
1568 result = 0;
1569 break;
1570 }
1571 if (result != 0 && result != -EAGAIN)
1572 break;
1573 result = 0;
1574 set_current_state(TASK_INTERRUPTIBLE);
1575 snd_pcm_stream_lock_irq(substream);
fea952e5 1576 state = runtime->status->state;
1da177e4 1577 snd_pcm_stream_unlock_irq(substream);
fea952e5 1578 if (state != SNDRV_PCM_STATE_RUNNING) {
1da177e4
LT		 1579 set_current_state(TASK_RUNNING);
1580 break;
1581 }
1582 res = schedule_timeout(10 * HZ);
1583 if (signal_pending(current)) {
1584 result = -ERESTARTSYS;
1585 break;
1586 }
1587 if (res == 0) {
61efcee8
TI		 1588 pcm_err(substream->pcm,
1589 "OSS sync error - DMA timeout\n");
1da177e4
LT		 1590 result = -EIO;
1591 break;
1592 }
1593 }
1594 remove_wait_queue(&runtime->sleep, &wait);
1595 return result;
1596}
1597
6ac77bc1 1598static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1599{
1600 int err = 0;
1601 unsigned int saved_f_flags;
6ac77bc1
TI		 1602 struct snd_pcm_substream *substream;
1603 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1604 snd_pcm_format_t format;
1605 unsigned long width;
1606 size_t size;
1607
1608 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1609 if (substream != NULL) {
1610 runtime = substream->runtime;
9c323fcb 1611 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1612 goto __direct;
1613 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1614 return err;
1615 format = snd_pcm_oss_format_from(runtime->oss.format);
1616 width = snd_pcm_format_physical_width(format);
e3a5d59a 1617 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1618 if (runtime->oss.buffer_used > 0) {
1619#ifdef OSS_DEBUG
61efcee8 1620 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1da177e4
LT		 1621#endif
1622 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1623 snd_pcm_format_set_silence(format,
1624 runtime->oss.buffer + runtime->oss.buffer_used,
1625 size);
1626 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
e3a5d59a
TI		 1627 if (err < 0) {
1628 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1629 return err;
e3a5d59a 1630 }
1da177e4
LT		 1631 } else if (runtime->oss.period_ptr > 0) {
1632#ifdef OSS_DEBUG
61efcee8 1633 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1da177e4
LT		 1634#endif
1635 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1636 snd_pcm_format_set_silence(format,
1637 runtime->oss.buffer,
1638 size * 8 / width);
1639 err = snd_pcm_oss_sync1(substream, size);
e3a5d59a
TI		 1640 if (err < 0) {
1641 mutex_unlock(&runtime->oss.params_lock);
1da177e4 1642 return err;
e3a5d59a 1643 }
1da177e4
LT		 1644 }
1645 /*
1646 * The ALSA's period might be a bit large than OSS one.
1647 * Fill the remain portion of ALSA period with zeros.
1648 */
1649 size = runtime->control->appl_ptr % runtime->period_size;
1650 if (size > 0) {
1651 size = runtime->period_size - size;
1652 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1653 size = (runtime->frame_bits * size) / 8;
1654 while (size > 0) {
1655 mm_segment_t fs;
1656 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1657 size -= size1;
1658 size1 *= 8;
1659 size1 /= runtime->sample_bits;
1660 snd_pcm_format_set_silence(runtime->format,
1661 runtime->oss.buffer,
1662 size1);
4939c660 1663 size1 /= runtime->channels; /* frames */
1da177e4 1664 fs = snd_enter_user();
fea952e5 1665 snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
1da177e4
LT		 1666 snd_leave_user(fs);
1667 }
1668 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1669 void __user *buffers[runtime->channels];
1670 memset(buffers, 0, runtime->channels * sizeof(void *));
1671 snd_pcm_lib_writev(substream, buffers, size);
1672 }
1673 }
e3a5d59a 1674 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1675 /*
1676 * finish sync: drain the buffer
1677 */
1678 __direct:
0df63e44
TI		 1679 saved_f_flags = substream->f_flags;
1680 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1681 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1682 substream->f_flags = saved_f_flags;
1da177e4
LT		 1683 if (err < 0)
1684 return err;
1685 runtime->oss.prepare = 1;
1686 }
1687
1688 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1689 if (substream != NULL) {
1690 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1691 return err;
1692 runtime = substream->runtime;
bf1bbb5a 1693 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1694 if (err < 0)
1695 return err;
1696 runtime->oss.buffer_used = 0;
1697 runtime->oss.prepare = 1;
1698 }
1699 return 0;
1700}
1701
6ac77bc1 1702static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1703{
1704 int idx;
1705
1706 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1707 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1708 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1709 if (substream == NULL)
1710 continue;
1711 runtime = substream->runtime;
1712 if (rate < 1000)
1713 rate = 1000;
1714 else if (rate > 192000)
1715 rate = 192000;
1716 if (runtime->oss.rate != rate) {
1717 runtime->oss.params = 1;
1718 runtime->oss.rate = rate;
1719 }
1720 }
1721 return snd_pcm_oss_get_rate(pcm_oss_file);
1722}
1723
6ac77bc1 1724static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1725{
6ac77bc1 1726 struct snd_pcm_substream *substream;
1da177e4
LT		 1727 int err;
1728
1729 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1730 return err;
1731 return substream->runtime->oss.rate;
1732}
1733
6ac77bc1 1734static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1735{
1736 int idx;
1737 if (channels < 1)
1738 channels = 1;
1739 if (channels > 128)
1740 return -EINVAL;
1741 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1742 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1743 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1744 if (substream == NULL)
1745 continue;
1746 runtime = substream->runtime;
1747 if (runtime->oss.channels != channels) {
1748 runtime->oss.params = 1;
1749 runtime->oss.channels = channels;
1750 }
1751 }
1752 return snd_pcm_oss_get_channels(pcm_oss_file);
1753}
1754
6ac77bc1 1755static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1756{
6ac77bc1 1757 struct snd_pcm_substream *substream;
1da177e4
LT		 1758 int err;
1759
1760 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1761 return err;
1762 return substream->runtime->oss.channels;
1763}
1764
6ac77bc1 1765static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1766{
6ac77bc1 1767 struct snd_pcm_substream *substream;
1da177e4
LT		 1768 int err;
1769
1770 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1771 return err;
1772 return substream->runtime->oss.period_bytes;
1773}
1774
6ac77bc1 1775static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1776{
6ac77bc1 1777 struct snd_pcm_substream *substream;
1da177e4
LT		 1778 int err;
1779 int direct;
6ac77bc1 1780 struct snd_pcm_hw_params *params;
1da177e4 1781 unsigned int formats = 0;
6ac77bc1 1782 struct snd_mask format_mask;
1da177e4
LT		 1783 int fmt;
1784
1785 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1786 return err;
9c323fcb 1787 if (atomic_read(&substream->mmap_count))
1da177e4 1788 direct = 1;
060d77b9
TI		 1789 else
1790 direct = substream->oss.setup.direct;
1da177e4
LT		 1791 if (!direct)
1792 return AFMT_MU_LAW | AFMT_U8 |
1793 AFMT_S16_LE | AFMT_S16_BE |
1794 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1795 AFMT_U16_BE |
1796 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1797 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1798 AFMT_S24_PACKED;
1da177e4
LT		 1799 params = kmalloc(sizeof(*params), GFP_KERNEL);
1800 if (!params)
1801 return -ENOMEM;
1802 _snd_pcm_hw_params_any(params);
1803 err = snd_pcm_hw_refine(substream, params);
1804 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1805 kfree(params);
7eaa943c
TI		 1806 if (err < 0)
1807 return err;
1da177e4
LT		 1808 for (fmt = 0; fmt < 32; ++fmt) {
1809 if (snd_mask_test(&format_mask, fmt)) {
1810 int f = snd_pcm_oss_format_to(fmt);
1811 if (f >= 0)
1812 formats |= f;
1813 }
1814 }
1815 return formats;
1816}
1817
6ac77bc1 1818static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1819{
1820 int formats, idx;
1821
1822 if (format != AFMT_QUERY) {
1823 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1824 if (formats < 0)
1825 return formats;
1da177e4
LT		 1826 if (!(formats & format))
1827 format = AFMT_U8;
1828 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1829 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1830 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1831 if (substream == NULL)
1832 continue;
1833 runtime = substream->runtime;
1834 if (runtime->oss.format != format) {
1835 runtime->oss.params = 1;
1836 runtime->oss.format = format;
1837 }
1838 }
1839 }
1840 return snd_pcm_oss_get_format(pcm_oss_file);
1841}
1842
6ac77bc1 1843static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1844{
6ac77bc1 1845 struct snd_pcm_substream *substream;
1da177e4
LT		 1846 int err;
1847
1848 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1849 return err;
1850 return substream->runtime->oss.format;
1851}
1852
6ac77bc1 1853static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1854{
6ac77bc1 1855 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1856
1857 if (substream == NULL)
1858 return 0;
1859 runtime = substream->runtime;
1860 if (subdivide == 0) {
1861 subdivide = runtime->oss.subdivision;
1862 if (subdivide == 0)
1863 subdivide = 1;
1864 return subdivide;
1865 }
1866 if (runtime->oss.subdivision || runtime->oss.fragshift)
1867 return -EINVAL;
1868 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1869 subdivide != 8 && subdivide != 16)
1870 return -EINVAL;
1871 runtime->oss.subdivision = subdivide;
1872 runtime->oss.params = 1;
1873 return subdivide;
1874}
1875
6ac77bc1 1876static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1877{
1878 int err = -EINVAL, idx;
1879
1880 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1881 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1882 if (substream == NULL)
1883 continue;
1884 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1885 return err;
1886 }
1887 return err;
1888}
1889
6ac77bc1 1890static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1891{
6ac77bc1 1892 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1893
1894 if (substream == NULL)
1895 return 0;
1896 runtime = substream->runtime;
1897 if (runtime->oss.subdivision || runtime->oss.fragshift)
1898 return -EINVAL;
1899 runtime->oss.fragshift = val & 0xffff;
1900 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1901 if (runtime->oss.fragshift < 4) /* < 16 */
1902 runtime->oss.fragshift = 4;
1903 if (runtime->oss.maxfrags < 2)
1904 runtime->oss.maxfrags = 2;
1905 runtime->oss.params = 1;
1906 return 0;
1907}
1908
6ac77bc1 1909static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1910{
1911 int err = -EINVAL, idx;
1912
1913 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1914 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1915 if (substream == NULL)
1916 continue;
1917 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1918 return err;
1919 }
1920 return err;
1921}
1922
1923static int snd_pcm_oss_nonblock(struct file * file)
1924{
db1dd4d3 1925 spin_lock(&file->f_lock);
1da177e4 1926 file->f_flags |= O_NONBLOCK;
db1dd4d3 1927 spin_unlock(&file->f_lock);
1da177e4
LT		 1928 return 0;
1929}
1930
6ac77bc1 1931static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1932{
1933
1934 if (substream == NULL) {
1935 res &= ~DSP_CAP_DUPLEX;
1936 return res;
1937 }
1938#ifdef DSP_CAP_MULTI
1939 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1940 if (substream->pstr->substream_count > 1)
1941 res |= DSP_CAP_MULTI;
1942#endif
1943 /* DSP_CAP_REALTIME is set all times: */
1944 /* all ALSA drivers can return actual pointer in ring buffer */
1945#if defined(DSP_CAP_REALTIME) && 0
1946 {
6ac77bc1 1947 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1948 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1949 res &= ~DSP_CAP_REALTIME;
1950 }
1951#endif
1952 return res;
1953}
1954
6ac77bc1 1955static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1956{
1957 int result, idx;
1958
1959 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1960 for (idx = 0; idx < 2; idx++) {
6ac77bc1 1961 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 1962 result = snd_pcm_oss_get_caps1(substream, result);
1963 }
1964 result |= 0x0001; /* revision - same as SB AWE 64 */
1965 return result;
1966}
1967
f240406b
JK		 1968static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
1969 snd_pcm_uframes_t hw_ptr)
1da177e4 1970{
6ac77bc1 1971 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1972 snd_pcm_uframes_t appl_ptr;
1973 appl_ptr = hw_ptr + runtime->buffer_size;
1974 appl_ptr %= runtime->boundary;
1975 runtime->control->appl_ptr = appl_ptr;
1976}
1977
6ac77bc1 1978static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 1979{
6ac77bc1
TI		 1980 struct snd_pcm_runtime *runtime;
1981 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 1982 int err, cmd;
1983
1984#ifdef OSS_DEBUG
61efcee8 1985 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 1986#endif
1987
1988 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1989 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1990
1991 if (psubstream) {
1992 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1993 return err;
1994 }
1995 if (csubstream) {
1996 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1997 return err;
1998 }
1999 if (psubstream) {
2000 runtime = psubstream->runtime;
2001 if (trigger & PCM_ENABLE_OUTPUT) {
2002 if (runtime->oss.trigger)
2003 goto _skip1;
9c323fcb 2004 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 2005 snd_pcm_oss_simulate_fill(psubstream,
2006 get_hw_ptr_period(runtime));
1da177e4
LT		 2007 runtime->oss.trigger = 1;
2008 runtime->start_threshold = 1;
2009 cmd = SNDRV_PCM_IOCTL_START;
2010 } else {
2011 if (!runtime->oss.trigger)
2012 goto _skip1;
2013 runtime->oss.trigger = 0;
2014 runtime->start_threshold = runtime->boundary;
2015 cmd = SNDRV_PCM_IOCTL_DROP;
2016 runtime->oss.prepare = 1;
2017 }
bf1bbb5a 2018 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1da177e4
LT		 2019 if (err < 0)
2020 return err;
2021 }
2022 _skip1:
2023 if (csubstream) {
2024 runtime = csubstream->runtime;
2025 if (trigger & PCM_ENABLE_INPUT) {
2026 if (runtime->oss.trigger)
2027 goto _skip2;
2028 runtime->oss.trigger = 1;
2029 runtime->start_threshold = 1;
2030 cmd = SNDRV_PCM_IOCTL_START;
2031 } else {
2032 if (!runtime->oss.trigger)
2033 goto _skip2;
2034 runtime->oss.trigger = 0;
2035 runtime->start_threshold = runtime->boundary;
2036 cmd = SNDRV_PCM_IOCTL_DROP;
2037 runtime->oss.prepare = 1;
2038 }
bf1bbb5a 2039 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1da177e4
LT		 2040 if (err < 0)
2041 return err;
2042 }
2043 _skip2:
2044 return 0;
2045}
2046
6ac77bc1 2047static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2048{
6ac77bc1 2049 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2050 int result = 0;
2051
2052 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2053 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2054 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2055 result |= PCM_ENABLE_OUTPUT;
2056 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2057 result |= PCM_ENABLE_INPUT;
2058 return result;
2059}
2060
6ac77bc1 2061static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2062{
6ac77bc1
TI		 2063 struct snd_pcm_substream *substream;
2064 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2065 snd_pcm_sframes_t delay;
2066 int err;
2067
2068 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2069 if (substream == NULL)
2070 return -EINVAL;
2071 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2072 return err;
2073 runtime = substream->runtime;
2074 if (runtime->oss.params || runtime->oss.prepare)
2075 return 0;
bf1bbb5a 2076 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 2077 if (err == -EPIPE)
2078 delay = 0; /* hack for broken OSS applications */
2079 else if (err < 0)
2080 return err;
2081 return snd_pcm_oss_bytes(substream, delay);
2082}
2083
6ac77bc1 2084static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2085{
6ac77bc1
TI		 2086 struct snd_pcm_substream *substream;
2087 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2088 snd_pcm_sframes_t delay;
2089 int fixup;
2090 struct count_info info;
2091 int err;
2092
2093 if (_info == NULL)
2094 return -EFAULT;
2095 substream = pcm_oss_file->streams[stream];
2096 if (substream == NULL)
2097 return -EINVAL;
2098 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2099 return err;
2100 runtime = substream->runtime;
2101 if (runtime->oss.params || runtime->oss.prepare) {
2102 memset(&info, 0, sizeof(info));
2103 if (copy_to_user(_info, &info, sizeof(info)))
2104 return -EFAULT;
2105 return 0;
2106 }
2107 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2108 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2109 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2110 err = 0;
2111 delay = 0;
2112 fixup = 0;
2113 } else {
2114 fixup = runtime->oss.buffer_used;
2115 }
2116 } else {
2117 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2118 fixup = -runtime->oss.buffer_used;
2119 }
2120 if (err < 0)
2121 return err;
2122 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
9c323fcb 2123 if (atomic_read(&substream->mmap_count)) {
1da177e4 2124 snd_pcm_sframes_t n;
f240406b
JK		 2125 delay = get_hw_ptr_period(runtime);
2126 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2127 if (n < 0)
2128 n += runtime->boundary;
2129 info.blocks = n / runtime->period_size;
f240406b 2130 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 2131 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2132 snd_pcm_oss_simulate_fill(substream, delay);
2133 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2134 } else {
5ac0fab9 2135 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2136 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2137 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2138 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2139 else
2140 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2141 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2142 } else {
5ac0fab9
JK		 2143 delay += fixup;
2144 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2145 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2146 }
1da177e4
LT		 2147 }
2148 if (copy_to_user(_info, &info, sizeof(info)))
2149 return -EFAULT;
2150 return 0;
2151}
2152
6ac77bc1 2153static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2154{
6ac77bc1
TI		 2155 struct snd_pcm_substream *substream;
2156 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2157 snd_pcm_sframes_t avail;
2158 int fixup;
2159 struct audio_buf_info info;
2160 int err;
2161
2162 if (_info == NULL)
2163 return -EFAULT;
2164 substream = pcm_oss_file->streams[stream];
2165 if (substream == NULL)
2166 return -EINVAL;
2167 runtime = substream->runtime;
2168
2169 if (runtime->oss.params &&
b2483716 2170 (err = snd_pcm_oss_change_params(substream, false)) < 0)
1da177e4
LT		 2171 return err;
2172
2173 info.fragsize = runtime->oss.period_bytes;
2174 info.fragstotal = runtime->periods;
2175 if (runtime->oss.prepare) {
2176 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2177 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2178 info.fragments = runtime->oss.periods;
2179 } else {
2180 info.bytes = 0;
2181 info.fragments = 0;
2182 }
2183 } else {
2184 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2185 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2186 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2187 avail = runtime->buffer_size;
2188 err = 0;
2189 fixup = 0;
2190 } else {
2191 avail = runtime->buffer_size - avail;
2192 fixup = -runtime->oss.buffer_used;
2193 }
2194 } else {
2195 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2196 fixup = runtime->oss.buffer_used;
2197 }
2198 if (err < 0)
2199 return err;
2200 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2201 info.fragments = info.bytes / runtime->oss.period_bytes;
2202 }
2203
2204#ifdef OSS_DEBUG
61efcee8
TI		 2205 pcm_dbg(substream->pcm,
2206 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2207 info.bytes, info.fragments, info.fragstotal, info.fragsize);
1da177e4
LT		 2208#endif
2209 if (copy_to_user(_info, &info, sizeof(info)))
2210 return -EFAULT;
2211 return 0;
2212}
2213
6ac77bc1 2214static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2215{
2216 // it won't be probably implemented
61efcee8 2217 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
1da177e4
LT		 2218 return -EINVAL;
2219}
2220
060d77b9 2221static const char *strip_task_path(const char *path)
1da177e4 2222{
060d77b9
TI		 2223 const char *ptr, *ptrl = NULL;
2224 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2225 if (*ptr == '/')
2226 ptrl = ptr + 1;
1da177e4 2227 }
060d77b9
TI		 2228 return ptrl;
2229}
2230
2231static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2232 const char *task_name,
2233 struct snd_pcm_oss_setup *rsetup)
2234{
2235 struct snd_pcm_oss_setup *setup;
2236
2237 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2238 do {
2239 for (setup = pcm->streams[stream].oss.setup_list; setup;
2240 setup = setup->next) {
2241 if (!strcmp(setup->task_name, task_name))
2242 goto out;
1da177e4 2243 }
060d77b9
TI		 2244 } while ((task_name = strip_task_path(task_name)) != NULL);
2245 out:
2246 if (setup)
2247 *rsetup = *setup;
1a60d4c5 2248 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 2249}
2250
3bf75f9b
TI		 2251static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2252{
2253 struct snd_pcm_runtime *runtime;
2254 runtime = substream->runtime;
2255 vfree(runtime->oss.buffer);
2256 runtime->oss.buffer = NULL;
2257#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2258 snd_pcm_oss_plugin_clear(substream);
2259#endif
2260 substream->oss.oss = 0;
2261}
2262
6ac77bc1
TI		 2263static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2264 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2265 int minor)
2266{
6ac77bc1 2267 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2268
2269 substream->oss.oss = 1;
060d77b9 2270 substream->oss.setup = *setup;
3bf75f9b 2271 if (setup->nonblock)
0df63e44 2272 substream->f_flags |= O_NONBLOCK;
1576274d 2273 else if (setup->block)
0df63e44 2274 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2275 runtime = substream->runtime;
2276 runtime->oss.params = 1;
2277 runtime->oss.trigger = 1;
2278 runtime->oss.rate = 8000;
e3a5d59a 2279 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 2280 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2281 case SNDRV_MINOR_OSS_PCM_8:
2282 runtime->oss.format = AFMT_U8;
2283 break;
2284 case SNDRV_MINOR_OSS_PCM_16:
2285 runtime->oss.format = AFMT_S16_LE;
2286 break;
2287 default:
2288 runtime->oss.format = AFMT_MU_LAW;
2289 }
2290 runtime->oss.channels = 1;
2291 runtime->oss.fragshift = 0;
2292 runtime->oss.maxfrags = 0;
2293 runtime->oss.subdivision = 0;
3bf75f9b 2294 substream->pcm_release = snd_pcm_oss_release_substream;
1da177e4
LT		 2295}
2296
6ac77bc1 2297static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2298{
2299 int cidx;
7eaa943c
TI		 2300 if (!pcm_oss_file)
2301 return 0;
1da177e4 2302 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2303 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2304 if (substream)
2305 snd_pcm_release_substream(substream);
1da177e4
LT		 2306 }
2307 kfree(pcm_oss_file);
2308 return 0;
2309}
2310
2311static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2312 struct snd_pcm *pcm,
2313 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2314 int minor,
060d77b9 2315 struct snd_pcm_oss_setup *setup)
1da177e4 2316{
3bf75f9b 2317 int idx, err;
6ac77bc1 2318 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2319 struct snd_pcm_substream *substream;
aeb5d727 2320 fmode_t f_mode = file->f_mode;
1da177e4 2321
7eaa943c
TI		 2322 if (rpcm_oss_file)
2323 *rpcm_oss_file = NULL;
1da177e4 2324
ca2c0966 2325 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 2326 if (pcm_oss_file == NULL)
2327 return -ENOMEM;
2328
2329 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2330 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2331 f_mode = FMODE_WRITE;
3bf75f9b 2332
0df63e44 2333 file->f_flags &= ~O_APPEND;
3bf75f9b 2334 for (idx = 0; idx < 2; idx++) {
060d77b9 2335 if (setup[idx].disable)
3bf75f9b 2336 continue;
6cb53e7e
TI		 2337 if (! pcm->streams[idx].substream_count)
2338 continue; /* no matching substream */
3bf75f9b
TI		 2339 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2340 if (! (f_mode & FMODE_WRITE))
2341 continue;
2342 } else {
2343 if (! (f_mode & FMODE_READ))
2344 continue;
2345 }
2346 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2347 if (err < 0) {
1da177e4
LT		 2348 snd_pcm_oss_release_file(pcm_oss_file);
2349 return err;
2350 }
3bf75f9b
TI		 2351
2352 pcm_oss_file->streams[idx] = substream;
1576274d 2353 substream->file = pcm_oss_file;
060d77b9 2354 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2355 }
2356
bbdc1b7d 2357 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2358 snd_pcm_oss_release_file(pcm_oss_file);
2359 return -EINVAL;
2360 }
1da177e4
LT		 2361
2362 file->private_data = pcm_oss_file;
7eaa943c
TI		 2363 if (rpcm_oss_file)
2364 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2365 return 0;
2366}
2367
2368
93f2e378
TI		 2369static int snd_task_name(struct task_struct *task, char *name, size_t size)
2370{
2371 unsigned int idx;
2372
7eaa943c
TI		 2373 if (snd_BUG_ON(!task || !name || size < 2))
2374 return -EINVAL;
93f2e378
TI		 2375 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2376 name[idx] = task->comm[idx];
2377 name[idx] = '\0';
2378 return 0;
2379}
2380
1da177e4
LT		 2381static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2382{
1da177e4
LT		 2383 int err;
2384 char task_name[32];
6ac77bc1
TI		 2385 struct snd_pcm *pcm;
2386 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2387 struct snd_pcm_oss_setup setup[2];
1da177e4
LT		 2388 int nonblock;
2389 wait_queue_t wait;
2390
02f4865f
TI		 2391 err = nonseekable_open(inode, file);
2392 if (err < 0)
2393 return err;
2394
f87135f5
CL		 2395 pcm = snd_lookup_oss_minor_data(iminor(inode),
2396 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 2397 if (pcm == NULL) {
2398 err = -ENODEV;
2399 goto __error1;
2400 }
2401 err = snd_card_file_add(pcm->card, file);
2402 if (err < 0)
2403 goto __error1;
2404 if (!try_module_get(pcm->card->module)) {
2405 err = -EFAULT;
2406 goto __error2;
2407 }
2408 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2409 err = -EFAULT;
2410 goto __error;
2411 }
1576274d 2412 memset(setup, 0, sizeof(setup));
1da177e4 2413 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2414 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2415 task_name, &setup[0]);
1da177e4 2416 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2417 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2418 task_name, &setup[1]);
1da177e4
LT		 2419
2420 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2421 if (!nonblock)
2422 nonblock = nonblock_open;
2423
2424 init_waitqueue_entry(&wait, current);
2425 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2426 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2427 while (1) {
2428 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2429 iminor(inode), setup);
1da177e4
LT		 2430 if (err >= 0)
2431 break;
2432 if (err == -EAGAIN) {
2433 if (nonblock) {
2434 err = -EBUSY;
2435 break;
2436 }
2437 } else
2438 break;
2439 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2440 mutex_unlock(&pcm->open_mutex);
1da177e4 2441 schedule();
1a60d4c5 2442 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2443 if (pcm->card->shutdown) {
2444 err = -ENODEV;
2445 break;
2446 }
1da177e4
LT		 2447 if (signal_pending(current)) {
2448 err = -ERESTARTSYS;
2449 break;
2450 }
2451 }
2452 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2453 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2454 if (err < 0)
2455 goto __error;
8bb4d9ce 2456 snd_card_unref(pcm->card);
1da177e4
LT		 2457 return err;
2458
2459 __error:
2460 module_put(pcm->card->module);
2461 __error2:
2462 snd_card_file_remove(pcm->card, file);
2463 __error1:
a0830dbd
TI		 2464 if (pcm)
2465 snd_card_unref(pcm->card);
1da177e4
LT		 2466 return err;
2467}
2468
2469static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2470{
6ac77bc1
TI		 2471 struct snd_pcm *pcm;
2472 struct snd_pcm_substream *substream;
2473 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2474
2475 pcm_oss_file = file->private_data;
2476 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2477 if (substream == NULL)
2478 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
7eaa943c
TI		 2479 if (snd_BUG_ON(!substream))
2480 return -ENXIO;
1da177e4 2481 pcm = substream->pcm;
de1b8b93
TI		 2482 if (!pcm->card->shutdown)
2483 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2484 mutex_lock(&pcm->open_mutex);
1da177e4 2485 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2486 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2487 wake_up(&pcm->open_wait);
2488 module_put(pcm->card->module);
2489 snd_card_file_remove(pcm->card, file);
2490 return 0;
2491}
2492
2493static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2494{
6ac77bc1 2495 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2496 int __user *p = (int __user *)arg;
2497 int res;
2498
2499 pcm_oss_file = file->private_data;
2500 if (cmd == OSS_GETVERSION)
2501 return put_user(SNDRV_OSS_VERSION, p);
2502 if (cmd == OSS_ALSAEMULVER)
2503 return put_user(1, p);
2504#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
2505 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2506 struct snd_pcm_substream *substream;
1da177e4
LT		 2507 int idx;
2508 for (idx = 0; idx < 2; ++idx) {
2509 substream = pcm_oss_file->streams[idx];
2510 if (substream != NULL)
2511 break;
2512 }
7eaa943c
TI		 2513 if (snd_BUG_ON(idx >= 2))
2514 return -ENXIO;
1da177e4
LT		 2515 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2516 }
2517#endif
2518 if (((cmd >> 8) & 0xff) != 'P')
2519 return -EINVAL;
2520#ifdef OSS_DEBUG
61efcee8 2521 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 2522#endif
2523 switch (cmd) {
2524 case SNDCTL_DSP_RESET:
2525 return snd_pcm_oss_reset(pcm_oss_file);
2526 case SNDCTL_DSP_SYNC:
2527 return snd_pcm_oss_sync(pcm_oss_file);
2528 case SNDCTL_DSP_SPEED:
2529 if (get_user(res, p))
2530 return -EFAULT;
2531 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2532 return res;
2533 return put_user(res, p);
2534 case SOUND_PCM_READ_RATE:
2535 res = snd_pcm_oss_get_rate(pcm_oss_file);
2536 if (res < 0)
2537 return res;
2538 return put_user(res, p);
2539 case SNDCTL_DSP_STEREO:
2540 if (get_user(res, p))
2541 return -EFAULT;
2542 res = res > 0 ? 2 : 1;
2543 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2544 return res;
2545 return put_user(--res, p);
2546 case SNDCTL_DSP_GETBLKSIZE:
2547 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2548 if (res < 0)
2549 return res;
2550 return put_user(res, p);
2551 case SNDCTL_DSP_SETFMT:
2552 if (get_user(res, p))
2553 return -EFAULT;
2554 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2555 if (res < 0)
2556 return res;
2557 return put_user(res, p);
2558 case SOUND_PCM_READ_BITS:
2559 res = snd_pcm_oss_get_format(pcm_oss_file);
2560 if (res < 0)
2561 return res;
2562 return put_user(res, p);
2563 case SNDCTL_DSP_CHANNELS:
2564 if (get_user(res, p))
2565 return -EFAULT;
2566 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2567 if (res < 0)
2568 return res;
2569 return put_user(res, p);
2570 case SOUND_PCM_READ_CHANNELS:
2571 res = snd_pcm_oss_get_channels(pcm_oss_file);
2572 if (res < 0)
2573 return res;
2574 return put_user(res, p);
2575 case SOUND_PCM_WRITE_FILTER:
2576 case SOUND_PCM_READ_FILTER:
2577 return -EIO;
2578 case SNDCTL_DSP_POST:
2579 return snd_pcm_oss_post(pcm_oss_file);
2580 case SNDCTL_DSP_SUBDIVIDE:
2581 if (get_user(res, p))
2582 return -EFAULT;
2583 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2584 if (res < 0)
2585 return res;
2586 return put_user(res, p);
2587 case SNDCTL_DSP_SETFRAGMENT:
2588 if (get_user(res, p))
2589 return -EFAULT;
2590 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2591 case SNDCTL_DSP_GETFMTS:
2592 res = snd_pcm_oss_get_formats(pcm_oss_file);
2593 if (res < 0)
2594 return res;
2595 return put_user(res, p);
2596 case SNDCTL_DSP_GETOSPACE:
2597 case SNDCTL_DSP_GETISPACE:
2598 return snd_pcm_oss_get_space(pcm_oss_file,
2599 cmd == SNDCTL_DSP_GETISPACE ?
2600 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2601 (struct audio_buf_info __user *) arg);
2602 case SNDCTL_DSP_NONBLOCK:
2603 return snd_pcm_oss_nonblock(file);
2604 case SNDCTL_DSP_GETCAPS:
2605 res = snd_pcm_oss_get_caps(pcm_oss_file);
2606 if (res < 0)
2607 return res;
2608 return put_user(res, p);
2609 case SNDCTL_DSP_GETTRIGGER:
2610 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2611 if (res < 0)
2612 return res;
2613 return put_user(res, p);
2614 case SNDCTL_DSP_SETTRIGGER:
2615 if (get_user(res, p))
2616 return -EFAULT;
2617 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2618 case SNDCTL_DSP_GETIPTR:
2619 case SNDCTL_DSP_GETOPTR:
2620 return snd_pcm_oss_get_ptr(pcm_oss_file,
2621 cmd == SNDCTL_DSP_GETIPTR ?
2622 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2623 (struct count_info __user *) arg);
2624 case SNDCTL_DSP_MAPINBUF:
2625 case SNDCTL_DSP_MAPOUTBUF:
2626 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2627 cmd == SNDCTL_DSP_MAPINBUF ?
2628 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2629 (struct buffmem_desc __user *) arg);
2630 case SNDCTL_DSP_SETSYNCRO:
2631 /* stop DMA now.. */
2632 return 0;
2633 case SNDCTL_DSP_SETDUPLEX:
2634 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2635 return 0;
2636 return -EIO;
2637 case SNDCTL_DSP_GETODELAY:
2638 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2639 if (res < 0) {
2640 /* it's for sure, some broken apps don't check for error codes */
2641 put_user(0, p);
2642 return res;
2643 }
2644 return put_user(res, p);
2645 case SNDCTL_DSP_PROFILE:
2646 return 0; /* silently ignore */
2647 default:
61efcee8 2648 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
1da177e4
LT		 2649 }
2650 return -EINVAL;
2651}
2652
2653#ifdef CONFIG_COMPAT
2654/* all compatible */
83266b6b
TI		 2655static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2656 unsigned long arg)
2657{
2658 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2659}
1da177e4
LT		 2660#else
2661#define snd_pcm_oss_ioctl_compat NULL
2662#endif
2663
2664static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2665{
6ac77bc1
TI		 2666 struct snd_pcm_oss_file *pcm_oss_file;
2667 struct snd_pcm_substream *substream;
1da177e4
LT		 2668
2669 pcm_oss_file = file->private_data;
2670 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2671 if (substream == NULL)
2672 return -ENXIO;
0df63e44 2673 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 2674#ifndef OSS_DEBUG
2675 return snd_pcm_oss_read1(substream, buf, count);
2676#else
2677 {
2678 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
61efcee8
TI		 2679 pcm_dbg(substream->pcm,
2680 "pcm_oss: read %li bytes (returned %li bytes)\n",
2681 (long)count, (long)res);
1da177e4
LT		 2682 return res;
2683 }
2684#endif
2685}
2686
2687static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2688{
6ac77bc1
TI		 2689 struct snd_pcm_oss_file *pcm_oss_file;
2690 struct snd_pcm_substream *substream;
1da177e4
LT		 2691 long result;
2692
2693 pcm_oss_file = file->private_data;
2694 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2695 if (substream == NULL)
2696 return -ENXIO;
0df63e44 2697 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2698 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2699#ifdef OSS_DEBUG
61efcee8 2700 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
006de267 2701 (long)count, (long)result);
1da177e4
LT		 2702#endif
2703 return result;
2704}
2705
6ac77bc1 2706static int snd_pcm_oss_playback_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_playback_avail(runtime) >=
2714 runtime->oss.period_frames;
1da177e4
LT		 2715}
2716
6ac77bc1 2717static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2718{
6ac77bc1 2719 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2720 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2721 return runtime->oss.prev_hw_ptr_period !=
2722 get_hw_ptr_period(runtime);
1da177e4 2723 else
f240406b
JK		 2724 return snd_pcm_capture_avail(runtime) >=
2725 runtime->oss.period_frames;
1da177e4
LT		 2726}
2727
2728static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2729{
6ac77bc1 2730 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4 2731 unsigned int mask;
6ac77bc1 2732 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2733
2734 pcm_oss_file = file->private_data;
2735
2736 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2737 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2738
2739 mask = 0;
2740 if (psubstream != NULL) {
6ac77bc1 2741 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2742 poll_wait(file, &runtime->sleep, wait);
2743 snd_pcm_stream_lock_irq(psubstream);
2744 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2745 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2746 snd_pcm_oss_playback_ready(psubstream)))
2747 mask |= POLLOUT | POLLWRNORM;
2748 snd_pcm_stream_unlock_irq(psubstream);
2749 }
2750 if (csubstream != NULL) {
6ac77bc1
TI		 2751 struct snd_pcm_runtime *runtime = csubstream->runtime;
2752 snd_pcm_state_t ostate;
1da177e4
LT		 2753 poll_wait(file, &runtime->sleep, wait);
2754 snd_pcm_stream_lock_irq(csubstream);
2755 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2756 snd_pcm_oss_capture_ready(csubstream))
2757 mask |= POLLIN | POLLRDNORM;
2758 snd_pcm_stream_unlock_irq(csubstream);
2759 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2760 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2761 memset(&ofile, 0, sizeof(ofile));
2762 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2763 runtime->oss.trigger = 0;
2764 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2765 }
2766 }
2767
2768 return mask;
2769}
2770
2771static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2772{
6ac77bc1
TI		 2773 struct snd_pcm_oss_file *pcm_oss_file;
2774 struct snd_pcm_substream *substream = NULL;
2775 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2776 int err;
2777
2778#ifdef OSS_DEBUG
61efcee8 2779 pr_debug("pcm_oss: mmap begin\n");
1da177e4
LT		 2780#endif
2781 pcm_oss_file = file->private_data;
2782 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2783 case VM_READ | VM_WRITE:
2784 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2785 if (substream)
2786 break;
2787 /* Fall through */
2788 case VM_READ:
2789 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2790 break;
2791 case VM_WRITE:
2792 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2793 break;
2794 default:
2795 return -EINVAL;
2796 }
2797 /* set VM_READ access as well to fix memset() routines that do
2798 reads before writes (to improve performance) */
2799 area->vm_flags |= VM_READ;
2800 if (substream == NULL)
2801 return -ENXIO;
2802 runtime = substream->runtime;
2803 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2804 return -EIO;
2805 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2806 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2807 else
2808 return -EIO;
2809
2810 if (runtime->oss.params) {
b2483716
TI		 2811 /* use mutex_trylock() for params_lock for avoiding a deadlock
2812 * between mmap_sem and params_lock taken by
2813 * copy_from/to_user() in snd_pcm_oss_write/read()
2814 */
2815 err = snd_pcm_oss_change_params(substream, true);
2816 if (err < 0)
1da177e4
LT		 2817 return err;
2818 }
21a3479a 2819#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2820 if (runtime->oss.plugin_first != NULL)
2821 return -EIO;
21a3479a 2822#endif
1da177e4
LT		 2823
2824 if (area->vm_pgoff != 0)
2825 return -EINVAL;
2826
2827 err = snd_pcm_mmap_data(substream, file, area);
2828 if (err < 0)
2829 return err;
2830 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2831 runtime->silence_threshold = 0;
2832 runtime->silence_size = 0;
2833#ifdef OSS_DEBUG
61efcee8 2834 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
006de267 2835 runtime->oss.mmap_bytes);
1da177e4
LT		 2836#endif
2837 /* In mmap mode we never stop */
2838 runtime->stop_threshold = runtime->boundary;
2839
2840 return 0;
2841}
2842
b7d90a35 2843#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2844/*
2845 * /proc interface
2846 */
2847
6ac77bc1
TI		 2848static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2849 struct snd_info_buffer *buffer)
1da177e4 2850{
6ac77bc1
TI		 2851 struct snd_pcm_str *pstr = entry->private_data;
2852 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2853 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2854 while (setup) {
2855 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2856 setup->task_name,
2857 setup->periods,
2858 setup->period_size,
2859 setup->disable ? " disable" : "",
2860 setup->direct ? " direct" : "",
2861 setup->block ? " block" : "",
2862 setup->nonblock ? " non-block" : "",
2863 setup->partialfrag ? " partial-frag" : "",
2864 setup->nosilence ? " no-silence" : "");
2865 setup = setup->next;
2866 }
1a60d4c5 2867 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2868}
2869
6ac77bc1 2870static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2871{
6ac77bc1 2872 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2873
1da177e4
LT		 2874 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2875 setup; setup = setupn) {
2876 setupn = setup->next;
2877 kfree(setup->task_name);
2878 kfree(setup);
2879 }
2880 pstr->oss.setup_list = NULL;
2881}
2882
6ac77bc1
TI		 2883static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2884 struct snd_info_buffer *buffer)
1da177e4 2885{
6ac77bc1 2886 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2887 char line[128], str[32], task_name[32];
2888 const char *ptr;
1da177e4 2889 int idx1;
6ac77bc1 2890 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2891
2892 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2893 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2894 memset(&template, 0, sizeof(template));
2895 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2896 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2897 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2898 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2899 continue;
2900 }
2901 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2902 if (!strcmp(setup->task_name, task_name)) {
2903 template = *setup;
2904 break;
2905 }
2906 }
2907 ptr = snd_info_get_str(str, ptr, sizeof(str));
2908 template.periods = simple_strtoul(str, NULL, 10);
2909 ptr = snd_info_get_str(str, ptr, sizeof(str));
2910 template.period_size = simple_strtoul(str, NULL, 10);
2911 for (idx1 = 31; idx1 >= 0; idx1--)
2912 if (template.period_size & (1 << idx1))
2913 break;
2914 for (idx1--; idx1 >= 0; idx1--)
2915 template.period_size &= ~(1 << idx1);
2916 do {
2917 ptr = snd_info_get_str(str, ptr, sizeof(str));
2918 if (!strcmp(str, "disable")) {
2919 template.disable = 1;
2920 } else if (!strcmp(str, "direct")) {
2921 template.direct = 1;
2922 } else if (!strcmp(str, "block")) {
2923 template.block = 1;
2924 } else if (!strcmp(str, "non-block")) {
2925 template.nonblock = 1;
2926 } else if (!strcmp(str, "partial-frag")) {
2927 template.partialfrag = 1;
2928 } else if (!strcmp(str, "no-silence")) {
2929 template.nosilence = 1;
10f69f9e
TI		 2930 } else if (!strcmp(str, "buggy-ptr")) {
2931 template.buggyptr = 1;
1da177e4
LT		 2932 }
2933 } while (*str);
2934 if (setup == NULL) {
060d77b9
TI		 2935 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2936 if (! setup) {
2937 buffer->error = -ENOMEM;
91054598 2938 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9
TI		 2939 return;
2940 }
2941 if (pstr->oss.setup_list == NULL)
2942 pstr->oss.setup_list = setup;
2943 else {
2944 for (setup1 = pstr->oss.setup_list;
2945 setup1->next; setup1 = setup1->next);
2946 setup1->next = setup;
2947 }
2948 template.task_name = kstrdup(task_name, GFP_KERNEL);
2949 if (! template.task_name) {
2950 kfree(setup);
1da177e4 2951 buffer->error = -ENOMEM;
91054598 2952 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9 2953 return;
1da177e4
LT		 2954 }
2955 }
060d77b9 2956 *setup = template;
1a60d4c5 2957 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2958 }
2959}
2960
6ac77bc1 2961static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 2962{
2963 int stream;
2964 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 2965 struct snd_info_entry *entry;
2966 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 2967 if (pstr->substream_count == 0)
2968 continue;
2969 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2970 entry->content = SNDRV_INFO_CONTENT_TEXT;
2971 entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
1da177e4 2972 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 2973 entry->c.text.write = snd_pcm_oss_proc_write;
2974 entry->private_data = pstr;
2975 if (snd_info_register(entry) < 0) {
2976 snd_info_free_entry(entry);
2977 entry = NULL;
2978 }
2979 }
2980 pstr->oss.proc_entry = entry;
2981 }
2982}
2983
6ac77bc1 2984static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 2985{
2986 int stream;
2987 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 2988 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 2989 snd_info_free_entry(pstr->oss.proc_entry);
2990 pstr->oss.proc_entry = NULL;
2991 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 2992 }
2993}
b7d90a35 2994#else /* !CONFIG_SND_VERBOSE_PROCFS */
04f141a8
TI		 2995#define snd_pcm_oss_proc_init(pcm)
2996#define snd_pcm_oss_proc_done(pcm)
b7d90a35 2997#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 2998
2999/*
3000 * ENTRY functions
3001 */
3002
9c2e08c5 3003static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 3004{
3005 .owner = THIS_MODULE,
3006 .read = snd_pcm_oss_read,
3007 .write = snd_pcm_oss_write,
3008 .open = snd_pcm_oss_open,
3009 .release = snd_pcm_oss_release,
02f4865f 3010 .llseek = no_llseek,
1da177e4
LT		 3011 .poll = snd_pcm_oss_poll,
3012 .unlocked_ioctl = snd_pcm_oss_ioctl,
3013 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3014 .mmap = snd_pcm_oss_mmap,
3015};
3016
6ac77bc1 3017static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4 3018{
1da177e4 3019 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 3020 pcm->card, index, &snd_pcm_oss_f_reg,
80d7d771 3021 pcm) < 0) {
61efcee8 3022 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
d3d579f8 3023 pcm->card->number, pcm->device);
1da177e4
LT		 3024 }
3025}
3026
6ac77bc1 3027static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 3028{
3029 pcm->oss.reg = 0;
896e6cc2 3030 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3031 char name[128];
3032 int duplex;
3033 register_oss_dsp(pcm, 0);
3034 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3035 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3036 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3037 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3038#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3039 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3040 pcm->card->number,
3041 name);
3042#endif
3043 pcm->oss.reg++;
3044 pcm->oss.reg_mask |= 1;
3045 }
896e6cc2 3046 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3047 register_oss_dsp(pcm, 1);
3048 pcm->oss.reg++;
3049 pcm->oss.reg_mask |= 2;
3050 }
3051
3052 if (pcm->oss.reg)
3053 snd_pcm_oss_proc_init(pcm);
3054
3055 return 0;
3056}
3057
6ac77bc1 3058static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3059{
3060 if (pcm->oss.reg) {
3061 if (pcm->oss.reg_mask & 1) {
3062 pcm->oss.reg_mask &= ~1;
3063 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3064 pcm->card, 0);
3065 }
3066 if (pcm->oss.reg_mask & 2) {
3067 pcm->oss.reg_mask &= ~2;
3068 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3069 pcm->card, 1);
3070 }
896e6cc2 3071 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3072#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3073 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3074#endif
3075 }
3076 pcm->oss.reg = 0;
1da177e4
LT		 3077 }
3078 return 0;
3079}
3080
c461482c
TI		 3081static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3082{
3083 snd_pcm_oss_disconnect_minor(pcm);
3084 snd_pcm_oss_proc_done(pcm);
3085 return 0;
3086}
3087
6ac77bc1 3088static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3089{
3090 .n_register = snd_pcm_oss_register_minor,
3091 .n_disconnect = snd_pcm_oss_disconnect_minor,
3092 .n_unregister = snd_pcm_oss_unregister_minor,
3093};
3094
3095static int __init alsa_pcm_oss_init(void)
3096{
3097 int i;
3098 int err;
3099
3100 /* check device map table */
3101 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3102 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3103 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
d3d579f8 3104 i, dsp_map[i]);
1da177e4
LT		 3105 dsp_map[i] = 0;
3106 }
896e6cc2 3107 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3108 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
d3d579f8 3109 i, adsp_map[i]);
1da177e4
LT		 3110 adsp_map[i] = 1;
3111 }
3112 }
3113 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3114 return err;
3115 return 0;
3116}
3117
3118static void __exit alsa_pcm_oss_exit(void)
3119{
3120 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3121}
3122
3123module_init(alsa_pcm_oss_init)
3124module_exit(alsa_pcm_oss_exit)
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