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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
[mirror_ubuntu-hirsute-kernel.git] / sound / core / oss / pcm_oss.c
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1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * Digital Audio (PCM) abstract layer / OSS compatible
c1017a4c 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 5 */
6
7#if 0
8#define PLUGIN_DEBUG
9#endif
10#if 0
11#define OSS_DEBUG
12#endif
13
1da177e4 14#include <linux/init.h>
1da177e4 15#include <linux/slab.h>
174cd4b1 16#include <linux/sched/signal.h>
1da177e4
LT		 17#include <linux/time.h>
18#include <linux/vmalloc.h>
65a77217 19#include <linux/module.h>
3f7440a6 20#include <linux/math64.h>
543537bd 21#include <linux/string.h>
83266b6b 22#include <linux/compat.h>
1da177e4
LT		 23#include <sound/core.h>
24#include <sound/minors.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include "pcm_plugin.h"
28#include <sound/info.h>
29#include <linux/soundcard.h>
30#include <sound/initval.h>
fea952e5 31#include <sound/mixer_oss.h>
1da177e4
LT		 32
33#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
34
6581f4e7 35static int dsp_map[SNDRV_CARDS];
1da177e4 36static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
a67ff6a5 37static bool nonblock_open = 1;
1da177e4 38
c1017a4c 39MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
1da177e4
LT		 40MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
41MODULE_LICENSE("GPL");
42module_param_array(dsp_map, int, NULL, 0444);
43MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
44module_param_array(adsp_map, int, NULL, 0444);
45MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
46module_param(nonblock_open, bool, 0644);
47MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
48MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
49MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
50
6ac77bc1
TI		 51static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
52static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
53static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
1da177e4 54
e88e8ae6
TI		 55/*
56 * helper functions to process hw_params
57 */
58static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
59{
60 int changed = 0;
61 if (i->min < min) {
62 i->min = min;
63 i->openmin = openmin;
64 changed = 1;
65 } else if (i->min == min && !i->openmin && openmin) {
66 i->openmin = 1;
67 changed = 1;
68 }
69 if (i->integer) {
70 if (i->openmin) {
71 i->min++;
72 i->openmin = 0;
73 }
74 }
75 if (snd_interval_checkempty(i)) {
76 snd_interval_none(i);
77 return -EINVAL;
78 }
79 return changed;
80}
81
82static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
83{
84 int changed = 0;
85 if (i->max > max) {
86 i->max = max;
87 i->openmax = openmax;
88 changed = 1;
89 } else if (i->max == max && !i->openmax && openmax) {
90 i->openmax = 1;
91 changed = 1;
92 }
93 if (i->integer) {
94 if (i->openmax) {
95 i->max--;
96 i->openmax = 0;
97 }
98 }
99 if (snd_interval_checkempty(i)) {
100 snd_interval_none(i);
101 return -EINVAL;
102 }
103 return changed;
104}
105
106static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
107{
108 struct snd_interval t;
109 t.empty = 0;
110 t.min = t.max = val;
111 t.openmin = t.openmax = 0;
112 t.integer = 1;
113 return snd_interval_refine(i, &t);
114}
115
116/**
117 * snd_pcm_hw_param_value_min
118 * @params: the hw_params instance
119 * @var: parameter to retrieve
120 * @dir: pointer to the direction (-1,0,1) or NULL
121 *
122 * Return the minimum value for field PAR.
123 */
124static unsigned int
125snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
126 snd_pcm_hw_param_t var, int *dir)
127{
128 if (hw_is_mask(var)) {
129 if (dir)
130 *dir = 0;
131 return snd_mask_min(hw_param_mask_c(params, var));
132 }
133 if (hw_is_interval(var)) {
134 const struct snd_interval *i = hw_param_interval_c(params, var);
135 if (dir)
136 *dir = i->openmin;
137 return snd_interval_min(i);
138 }
139 return -EINVAL;
140}
141
142/**
143 * snd_pcm_hw_param_value_max
144 * @params: the hw_params instance
145 * @var: parameter to retrieve
146 * @dir: pointer to the direction (-1,0,1) or NULL
147 *
148 * Return the maximum value for field PAR.
149 */
150static unsigned int
151snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
152 snd_pcm_hw_param_t var, int *dir)
153{
154 if (hw_is_mask(var)) {
155 if (dir)
156 *dir = 0;
157 return snd_mask_max(hw_param_mask_c(params, var));
158 }
159 if (hw_is_interval(var)) {
160 const struct snd_interval *i = hw_param_interval_c(params, var);
161 if (dir)
162 *dir = - (int) i->openmax;
163 return snd_interval_max(i);
164 }
165 return -EINVAL;
166}
167
168static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
169 snd_pcm_hw_param_t var,
170 const struct snd_mask *val)
171{
172 int changed;
173 changed = snd_mask_refine(hw_param_mask(params, var), val);
7a0a8716 174 if (changed > 0) {
e88e8ae6
TI		 175 params->cmask |= 1 << var;
176 params->rmask |= 1 << var;
177 }
178 return changed;
179}
180
181static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
182 struct snd_pcm_hw_params *params,
183 snd_pcm_hw_param_t var,
184 const struct snd_mask *val)
185{
186 int changed = _snd_pcm_hw_param_mask(params, var, val);
187 if (changed < 0)
188 return changed;
189 if (params->rmask) {
190 int err = snd_pcm_hw_refine(pcm, params);
191 if (err < 0)
192 return err;
193 }
194 return 0;
195}
196
197static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
198 snd_pcm_hw_param_t var, unsigned int val,
199 int dir)
200{
201 int changed;
202 int open = 0;
203 if (dir) {
204 if (dir > 0) {
205 open = 1;
206 } else if (dir < 0) {
207 if (val > 0) {
208 open = 1;
209 val--;
210 }
211 }
212 }
213 if (hw_is_mask(var))
214 changed = snd_mask_refine_min(hw_param_mask(params, var),
215 val + !!open);
216 else if (hw_is_interval(var))
217 changed = snd_interval_refine_min(hw_param_interval(params, var),
218 val, open);
219 else
220 return -EINVAL;
7a0a8716 221 if (changed > 0) {
e88e8ae6
TI		 222 params->cmask |= 1 << var;
223 params->rmask |= 1 << var;
224 }
225 return changed;
226}
227
228/**
229 * snd_pcm_hw_param_min
230 * @pcm: PCM instance
231 * @params: the hw_params instance
232 * @var: parameter to retrieve
233 * @val: minimal value
234 * @dir: pointer to the direction (-1,0,1) or NULL
235 *
236 * Inside configuration space defined by PARAMS remove from PAR all
237 * values < VAL. Reduce configuration space accordingly.
238 * Return new minimum or -EINVAL if the configuration space is empty
239 */
240static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
241 struct snd_pcm_hw_params *params,
242 snd_pcm_hw_param_t var, unsigned int val,
243 int *dir)
244{
245 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
246 if (changed < 0)
247 return changed;
248 if (params->rmask) {
249 int err = snd_pcm_hw_refine(pcm, params);
250 if (err < 0)
251 return err;
252 }
253 return snd_pcm_hw_param_value_min(params, var, dir);
254}
255
256static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
257 snd_pcm_hw_param_t var, unsigned int val,
258 int dir)
259{
260 int changed;
261 int open = 0;
262 if (dir) {
263 if (dir < 0) {
264 open = 1;
265 } else if (dir > 0) {
266 open = 1;
267 val++;
268 }
269 }
270 if (hw_is_mask(var)) {
271 if (val == 0 && open) {
272 snd_mask_none(hw_param_mask(params, var));
273 changed = -EINVAL;
274 } else
275 changed = snd_mask_refine_max(hw_param_mask(params, var),
276 val - !!open);
277 } else if (hw_is_interval(var))
278 changed = snd_interval_refine_max(hw_param_interval(params, var),
279 val, open);
280 else
281 return -EINVAL;
7a0a8716 282 if (changed > 0) {
e88e8ae6
TI		 283 params->cmask |= 1 << var;
284 params->rmask |= 1 << var;
285 }
286 return changed;
287}
288
289/**
290 * snd_pcm_hw_param_max
291 * @pcm: PCM instance
292 * @params: the hw_params instance
293 * @var: parameter to retrieve
294 * @val: maximal value
295 * @dir: pointer to the direction (-1,0,1) or NULL
296 *
297 * Inside configuration space defined by PARAMS remove from PAR all
298 * values >= VAL + 1. Reduce configuration space accordingly.
299 * Return new maximum or -EINVAL if the configuration space is empty
300 */
301static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
302 struct snd_pcm_hw_params *params,
303 snd_pcm_hw_param_t var, unsigned int val,
304 int *dir)
305{
306 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
307 if (changed < 0)
308 return changed;
309 if (params->rmask) {
310 int err = snd_pcm_hw_refine(pcm, params);
311 if (err < 0)
312 return err;
313 }
314 return snd_pcm_hw_param_value_max(params, var, dir);
315}
316
317static int boundary_sub(int a, int adir,
318 int b, int bdir,
319 int *c, int *cdir)
320{
321 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
322 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
323 *c = a - b;
324 *cdir = adir - bdir;
325 if (*cdir == -2) {
326 (*c)--;
327 } else if (*cdir == 2) {
328 (*c)++;
329 }
330 return 0;
331}
332
333static int boundary_lt(unsigned int a, int adir,
334 unsigned int b, int bdir)
335{
336 if (adir < 0) {
337 a--;
338 adir = 1;
339 } else if (adir > 0)
340 adir = 1;
341 if (bdir < 0) {
342 b--;
343 bdir = 1;
344 } else if (bdir > 0)
345 bdir = 1;
346 return a < b || (a == b && adir < bdir);
347}
348
349/* Return 1 if min is nearer to best than max */
350static int boundary_nearer(int min, int mindir,
351 int best, int bestdir,
352 int max, int maxdir)
353{
354 int dmin, dmindir;
355 int dmax, dmaxdir;
356 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
357 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
358 return boundary_lt(dmin, dmindir, dmax, dmaxdir);
359}
360
361/**
362 * snd_pcm_hw_param_near
363 * @pcm: PCM instance
364 * @params: the hw_params instance
365 * @var: parameter to retrieve
366 * @best: value to set
367 * @dir: pointer to the direction (-1,0,1) or NULL
368 *
369 * Inside configuration space defined by PARAMS set PAR to the available value
370 * nearest to VAL. Reduce configuration space accordingly.
371 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
372 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
373 * Return the value found.
374 */
375static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
376 struct snd_pcm_hw_params *params,
377 snd_pcm_hw_param_t var, unsigned int best,
378 int *dir)
379{
380 struct snd_pcm_hw_params *save = NULL;
381 int v;
382 unsigned int saved_min;
383 int last = 0;
384 int min, max;
385 int mindir, maxdir;
386 int valdir = dir ? *dir : 0;
387 /* FIXME */
388 if (best > INT_MAX)
389 best = INT_MAX;
390 min = max = best;
391 mindir = maxdir = valdir;
392 if (maxdir > 0)
393 maxdir = 0;
394 else if (maxdir == 0)
395 maxdir = -1;
396 else {
397 maxdir = 1;
398 max--;
399 }
400 save = kmalloc(sizeof(*save), GFP_KERNEL);
401 if (save == NULL)
402 return -ENOMEM;
403 *save = *params;
404 saved_min = min;
405 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
406 if (min >= 0) {
407 struct snd_pcm_hw_params *params1;
408 if (max < 0)
409 goto _end;
410 if ((unsigned int)min == saved_min && mindir == valdir)
411 goto _end;
412 params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
413 if (params1 == NULL) {
414 kfree(save);
415 return -ENOMEM;
416 }
417 *params1 = *save;
418 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
419 if (max < 0) {
420 kfree(params1);
421 goto _end;
422 }
423 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
424 *params = *params1;
425 last = 1;
426 }
427 kfree(params1);
428 } else {
429 *params = *save;
430 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
3daa7ea6
JJ		 431 if (max < 0) {
432 kfree(save);
7eaa943c 433 return max;
3daa7ea6 434 }
e88e8ae6
TI		 435 last = 1;
436 }
437 _end:
438 kfree(save);
439 if (last)
440 v = snd_pcm_hw_param_last(pcm, params, var, dir);
441 else
442 v = snd_pcm_hw_param_first(pcm, params, var, dir);
e88e8ae6
TI		 443 return v;
444}
445
446static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
447 snd_pcm_hw_param_t var, unsigned int val,
448 int dir)
449{
450 int changed;
451 if (hw_is_mask(var)) {
452 struct snd_mask *m = hw_param_mask(params, var);
453 if (val == 0 && dir < 0) {
454 changed = -EINVAL;
455 snd_mask_none(m);
456 } else {
457 if (dir > 0)
458 val++;
459 else if (dir < 0)
460 val--;
461 changed = snd_mask_refine_set(hw_param_mask(params, var), val);
462 }
463 } else if (hw_is_interval(var)) {
464 struct snd_interval *i = hw_param_interval(params, var);
465 if (val == 0 && dir < 0) {
466 changed = -EINVAL;
467 snd_interval_none(i);
468 } else if (dir == 0)
469 changed = snd_interval_refine_set(i, val);
470 else {
471 struct snd_interval t;
472 t.openmin = 1;
473 t.openmax = 1;
474 t.empty = 0;
475 t.integer = 0;
476 if (dir < 0) {
477 t.min = val - 1;
478 t.max = val;
479 } else {
480 t.min = val;
481 t.max = val+1;
482 }
483 changed = snd_interval_refine(i, &t);
484 }
485 } else
486 return -EINVAL;
7a0a8716 487 if (changed > 0) {
e88e8ae6
TI		 488 params->cmask |= 1 << var;
489 params->rmask |= 1 << var;
490 }
491 return changed;
492}
493
494/**
495 * snd_pcm_hw_param_set
496 * @pcm: PCM instance
497 * @params: the hw_params instance
498 * @var: parameter to retrieve
499 * @val: value to set
500 * @dir: pointer to the direction (-1,0,1) or NULL
501 *
502 * Inside configuration space defined by PARAMS remove from PAR all
503 * values != VAL. Reduce configuration space accordingly.
504 * Return VAL or -EINVAL if the configuration space is empty
505 */
506static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
507 struct snd_pcm_hw_params *params,
508 snd_pcm_hw_param_t var, unsigned int val,
509 int dir)
510{
511 int changed = _snd_pcm_hw_param_set(params, var, val, dir);
512 if (changed < 0)
513 return changed;
514 if (params->rmask) {
515 int err = snd_pcm_hw_refine(pcm, params);
516 if (err < 0)
517 return err;
518 }
519 return snd_pcm_hw_param_value(params, var, NULL);
520}
521
522static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
523 snd_pcm_hw_param_t var)
524{
525 int changed;
526 changed = snd_interval_setinteger(hw_param_interval(params, var));
7a0a8716 527 if (changed > 0) {
e88e8ae6
TI		 528 params->cmask |= 1 << var;
529 params->rmask |= 1 << var;
530 }
531 return changed;
532}
533
534/*
535 * plugin
536 */
537
21a3479a 538#ifdef CONFIG_SND_PCM_OSS_PLUGINS
6ac77bc1 539static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
1da177e4 540{
6ac77bc1
TI		 541 struct snd_pcm_runtime *runtime = substream->runtime;
542 struct snd_pcm_plugin *plugin, *next;
1da177e4
LT		 543
544 plugin = runtime->oss.plugin_first;
545 while (plugin) {
546 next = plugin->next;
547 snd_pcm_plugin_free(plugin);
548 plugin = next;
549 }
550 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
551 return 0;
552}
553
6ac77bc1 554static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
1da177e4 555{
6ac77bc1 556 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 557 plugin->next = runtime->oss.plugin_first;
558 plugin->prev = NULL;
559 if (runtime->oss.plugin_first) {
560 runtime->oss.plugin_first->prev = plugin;
561 runtime->oss.plugin_first = plugin;
562 } else {
563 runtime->oss.plugin_last =
564 runtime->oss.plugin_first = plugin;
565 }
566 return 0;
567}
568
6ac77bc1 569int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
1da177e4 570{
6ac77bc1 571 struct snd_pcm_runtime *runtime = plugin->plug->runtime;
1da177e4
LT		 572 plugin->next = NULL;
573 plugin->prev = runtime->oss.plugin_last;
574 if (runtime->oss.plugin_last) {
575 runtime->oss.plugin_last->next = plugin;
576 runtime->oss.plugin_last = plugin;
577 } else {
578 runtime->oss.plugin_last =
579 runtime->oss.plugin_first = plugin;
580 }
581 return 0;
582}
21a3479a 583#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 584
6ac77bc1 585static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
1da177e4 586{
6ac77bc1 587 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 588 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
bfc5bddb 589 long bytes = frames_to_bytes(runtime, frames);
1da177e4 590 if (buffer_size == runtime->oss.buffer_bytes)
bfc5bddb 591 return bytes;
cdc5c53f
TI		 592#if BITS_PER_LONG >= 64
593 return runtime->oss.buffer_bytes * bytes / buffer_size;
594#else
595 {
596 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
3f7440a6 597 return div_u64(bsize, buffer_size);
cdc5c53f
TI		 598 }
599#endif
1da177e4
LT		 600}
601
6ac77bc1 602static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
1da177e4 603{
6ac77bc1 604 struct snd_pcm_runtime *runtime = substream->runtime;
af081613 605 long buffer_size = snd_pcm_lib_buffer_bytes(substream);
1da177e4
LT		 606 if (buffer_size == runtime->oss.buffer_bytes)
607 return bytes_to_frames(runtime, bytes);
608 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
609}
610
f240406b
JK		 611static inline
612snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
613{
e7636925 614 return runtime->hw_ptr_interrupt;
f240406b
JK		 615}
616
24038a25
TI		 617/* define extended formats in the recent OSS versions (if any) */
618/* linear formats */
619#define AFMT_S32_LE 0x00001000
620#define AFMT_S32_BE 0x00002000
621#define AFMT_S24_LE 0x00008000
622#define AFMT_S24_BE 0x00010000
623#define AFMT_S24_PACKED 0x00040000
624
625/* other supported formats */
626#define AFMT_FLOAT 0x00004000
627#define AFMT_SPDIF_RAW 0x00020000
628
629/* unsupported formats */
630#define AFMT_AC3 0x00000400
631#define AFMT_VORBIS 0x00000800
632
fea952e5 633static snd_pcm_format_t snd_pcm_oss_format_from(int format)
1da177e4
LT		 634{
635 switch (format) {
636 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
637 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
638 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
639 case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
640 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
641 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
642 case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
643 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
644 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
645 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
24038a25
TI		 646 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
647 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
648 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
649 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
650 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
651 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
652 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
1da177e4
LT		 653 default: return SNDRV_PCM_FORMAT_U8;
654 }
655}
656
fea952e5 657static int snd_pcm_oss_format_to(snd_pcm_format_t format)
1da177e4
LT		 658{
659 switch (format) {
660 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
661 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
662 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
663 case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
664 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
665 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
666 case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
667 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
668 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
669 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
24038a25
TI		 670 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
671 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
672 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
673 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
674 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
675 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
676 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
1da177e4
LT		 677 default: return -EINVAL;
678 }
679}
680
6ac77bc1
TI		 681static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
682 struct snd_pcm_hw_params *oss_params,
683 struct snd_pcm_hw_params *slave_params)
1da177e4
LT		 684{
685 size_t s;
686 size_t oss_buffer_size, oss_period_size, oss_periods;
687 size_t min_period_size, max_period_size;
6ac77bc1 688 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 689 size_t oss_frame_size;
690
691 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
692 params_channels(oss_params) / 8;
693
694 oss_buffer_size = snd_pcm_plug_client_size(substream,
695 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
f6dbe1be 696 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
9c323fcb 697 if (atomic_read(&substream->mmap_count)) {
1da177e4
LT		 698 if (oss_buffer_size > runtime->oss.mmap_bytes)
699 oss_buffer_size = runtime->oss.mmap_bytes;
700 }
701
060d77b9
TI		 702 if (substream->oss.setup.period_size > 16)
703 oss_period_size = substream->oss.setup.period_size;
1da177e4
LT		 704 else if (runtime->oss.fragshift) {
705 oss_period_size = 1 << runtime->oss.fragshift;
706 if (oss_period_size > oss_buffer_size / 2)
707 oss_period_size = oss_buffer_size / 2;
708 } else {
709 int sd;
710 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
711
712 oss_period_size = oss_buffer_size;
713 do {
714 oss_period_size /= 2;
715 } while (oss_period_size > bytes_per_sec);
716 if (runtime->oss.subdivision == 0) {
717 sd = 4;
718 if (oss_period_size / sd > 4096)
719 sd *= 2;
720 if (oss_period_size / sd < 4096)
721 sd = 1;
722 } else
723 sd = runtime->oss.subdivision;
724 oss_period_size /= sd;
725 if (oss_period_size < 16)
726 oss_period_size = 16;
727 }
728
729 min_period_size = snd_pcm_plug_client_size(substream,
730 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
731 min_period_size *= oss_frame_size;
f6dbe1be 732 min_period_size = roundup_pow_of_two(min_period_size);
1da177e4
LT		 733 if (oss_period_size < min_period_size)
734 oss_period_size = min_period_size;
735
736 max_period_size = snd_pcm_plug_client_size(substream,
737 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
738 max_period_size *= oss_frame_size;
f6dbe1be 739 max_period_size = rounddown_pow_of_two(max_period_size);
1da177e4
LT		 740 if (oss_period_size > max_period_size)
741 oss_period_size = max_period_size;
742
743 oss_periods = oss_buffer_size / oss_period_size;
744
060d77b9
TI		 745 if (substream->oss.setup.periods > 1)
746 oss_periods = substream->oss.setup.periods;
1da177e4
LT		 747
748 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
749 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
750 s = runtime->oss.maxfrags;
751 if (oss_periods > s)
752 oss_periods = s;
753
754 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
755 if (s < 2)
756 s = 2;
757 if (oss_periods < s)
758 oss_periods = s;
759
760 while (oss_period_size * oss_periods > oss_buffer_size)
761 oss_period_size /= 2;
762
7eaa943c
TI		 763 if (oss_period_size < 16)
764 return -EINVAL;
1da177e4
LT		 765 runtime->oss.period_bytes = oss_period_size;
766 runtime->oss.period_frames = 1;
767 runtime->oss.periods = oss_periods;
768 return 0;
769}
770
6ac77bc1
TI		 771static int choose_rate(struct snd_pcm_substream *substream,
772 struct snd_pcm_hw_params *params, unsigned int best_rate)
1da177e4 773{
b55f9fdc 774 const struct snd_interval *it;
6ac77bc1 775 struct snd_pcm_hw_params *save;
1da177e4
LT		 776 unsigned int rate, prev;
777
778 save = kmalloc(sizeof(*save), GFP_KERNEL);
779 if (save == NULL)
780 return -ENOMEM;
781 *save = *params;
b55f9fdc 782 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 783
784 /* try multiples of the best rate */
785 rate = best_rate;
786 for (;;) {
787 if (it->max < rate || (it->max == rate && it->openmax))
788 break;
789 if (it->min < rate || (it->min == rate && !it->openmin)) {
790 int ret;
791 ret = snd_pcm_hw_param_set(substream, params,
792 SNDRV_PCM_HW_PARAM_RATE,
793 rate, 0);
794 if (ret == (int)rate) {
795 kfree(save);
796 return rate;
797 }
798 *params = *save;
799 }
800 prev = rate;
801 rate += best_rate;
802 if (rate <= prev)
803 break;
804 }
805
806 /* not found, use the nearest rate */
807 kfree(save);
808 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
809}
810
f6d297df
TI		 811/* parameter locking: returns immediately if tried during streaming */
812static int lock_params(struct snd_pcm_runtime *runtime)
813{
814 if (mutex_lock_interruptible(&runtime->oss.params_lock))
815 return -ERESTARTSYS;
816 if (atomic_read(&runtime->oss.rw_ref)) {
817 mutex_unlock(&runtime->oss.params_lock);
818 return -EBUSY;
819 }
820 return 0;
821}
822
823static void unlock_params(struct snd_pcm_runtime *runtime)
824{
825 mutex_unlock(&runtime->oss.params_lock);
826}
827
02a5d692
TI		 828/* call with params_lock held */
829static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
1da177e4 830{
6ac77bc1
TI		 831 struct snd_pcm_runtime *runtime = substream->runtime;
832 struct snd_pcm_hw_params *params, *sparams;
833 struct snd_pcm_sw_params *sw_params;
1da177e4
LT		 834 ssize_t oss_buffer_size, oss_period_size;
835 size_t oss_frame_size;
836 int err;
837 int direct;
fea952e5
CL		 838 snd_pcm_format_t format, sformat;
839 int n;
e76bf3c4 840 const struct snd_mask *sformat_mask;
6ac77bc1 841 struct snd_mask mask;
1da177e4 842
02a5d692
TI		 843 if (!runtime->oss.params)
844 return 0;
46325371 845 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
1da177e4
LT		 846 params = kmalloc(sizeof(*params), GFP_KERNEL);
847 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
848 if (!sw_params || !params || !sparams) {
1da177e4
LT		 849 err = -ENOMEM;
850 goto failure;
851 }
852
9c323fcb 853 if (atomic_read(&substream->mmap_count))
1da177e4 854 direct = 1;
060d77b9
TI		 855 else
856 direct = substream->oss.setup.direct;
1da177e4
LT		 857
858 _snd_pcm_hw_params_any(sparams);
859 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
860 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
861 snd_mask_none(&mask);
9c323fcb 862 if (atomic_read(&substream->mmap_count))
fea952e5 863 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 864 else {
fea952e5 865 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 866 if (!direct)
fea952e5 867 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
1da177e4
LT		 868 }
869 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
870 if (err < 0) {
61efcee8 871 pcm_dbg(substream->pcm, "No usable accesses\n");
1da177e4
LT		 872 err = -EINVAL;
873 goto failure;
874 }
875 choose_rate(substream, sparams, runtime->oss.rate);
876 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
877
878 format = snd_pcm_oss_format_from(runtime->oss.format);
879
e76bf3c4 880 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 881 if (direct)
882 sformat = format;
883 else
e76bf3c4 884 sformat = snd_pcm_plug_slave_format(format, sformat_mask);
1da177e4 885
fea952e5 886 if ((__force int)sformat < 0 ||
e76bf3c4 887 !snd_mask_test(sformat_mask, (__force int)sformat)) {
fea952e5
CL		 888 for (sformat = (__force snd_pcm_format_t)0;
889 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
890 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
e76bf3c4 891 if (snd_mask_test(sformat_mask, (__force int)sformat) &&
1da177e4
LT		 892 snd_pcm_oss_format_to(sformat) >= 0)
893 break;
894 }
fea952e5 895 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
61efcee8 896 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
1da177e4
LT		 897 err = -EINVAL;
898 goto failure;
899 }
900 }
fea952e5 901 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
7eaa943c
TI		 902 if (err < 0)
903 goto failure;
1da177e4
LT		 904
905 if (direct) {
906 memcpy(params, sparams, sizeof(*params));
907 } else {
908 _snd_pcm_hw_params_any(params);
909 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
fea952e5 910 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
1da177e4 911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
fea952e5 912 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
1da177e4
LT		 913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
914 runtime->oss.channels, 0);
915 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
916 runtime->oss.rate, 0);
917 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
918 params_access(params), params_format(params),
919 params_channels(params), params_rate(params));
920 }
921 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
922 params_access(sparams), params_format(sparams),
923 params_channels(sparams), params_rate(sparams));
924
925 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
926 params_channels(params) / 8;
927
ca0214ee
TI		 928 err = snd_pcm_oss_period_size(substream, params, sparams);
929 if (err < 0)
930 goto failure;
931
932 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
933 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
934 if (err < 0)
935 goto failure;
936
937 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
938 runtime->oss.periods, NULL);
939 if (err < 0)
940 goto failure;
941
942 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
943
944 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
945 if (err < 0) {
946 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
947 goto failure;
948 }
949
21a3479a 950#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 951 snd_pcm_oss_plugin_clear(substream);
952 if (!direct) {
953 /* add necessary plugins */
954 snd_pcm_oss_plugin_clear(substream);
955 if ((err = snd_pcm_plug_format_plugins(substream,
956 params,
957 sparams)) < 0) {
61efcee8
TI		 958 pcm_dbg(substream->pcm,
959 "snd_pcm_plug_format_plugins failed: %i\n", err);
1da177e4
LT		 960 snd_pcm_oss_plugin_clear(substream);
961 goto failure;
962 }
963 if (runtime->oss.plugin_first) {
6ac77bc1 964 struct snd_pcm_plugin *plugin;
1da177e4 965 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
61efcee8
TI		 966 pcm_dbg(substream->pcm,
967 "snd_pcm_plugin_build_io failed: %i\n", err);
1da177e4
LT		 968 snd_pcm_oss_plugin_clear(substream);
969 goto failure;
970 }
971 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
972 err = snd_pcm_plugin_append(plugin);
973 } else {
974 err = snd_pcm_plugin_insert(plugin);
975 }
976 if (err < 0) {
977 snd_pcm_oss_plugin_clear(substream);
978 goto failure;
979 }
980 }
981 }
21a3479a 982#endif
1da177e4 983
1da177e4
LT		 984 if (runtime->oss.trigger) {
985 sw_params->start_threshold = 1;
986 } else {
987 sw_params->start_threshold = runtime->boundary;
988 }
9c323fcb
TI		 989 if (atomic_read(&substream->mmap_count) ||
990 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 991 sw_params->stop_threshold = runtime->boundary;
992 else
993 sw_params->stop_threshold = runtime->buffer_size;
994 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
995 sw_params->period_step = 1;
004e6538
TI		 996 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
997 1 : runtime->period_size;
9c323fcb 998 if (atomic_read(&substream->mmap_count) ||
060d77b9 999 substream->oss.setup.nosilence) {
1da177e4
LT		 1000 sw_params->silence_threshold = 0;
1001 sw_params->silence_size = 0;
1002 } else {
1003 snd_pcm_uframes_t frames;
1004 frames = runtime->period_size + 16;
1005 if (frames > runtime->buffer_size)
1006 frames = runtime->buffer_size;
1007 sw_params->silence_threshold = frames;
1008 sw_params->silence_size = frames;
1009 }
1010
1011 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
61efcee8 1012 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1da177e4
LT		 1013 goto failure;
1014 }
1015
1016 runtime->oss.periods = params_periods(sparams);
1017 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
7eaa943c
TI		 1018 if (oss_period_size < 0) {
1019 err = -EINVAL;
1020 goto failure;
1021 }
21a3479a 1022#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1023 if (runtime->oss.plugin_first) {
1024 err = snd_pcm_plug_alloc(substream, oss_period_size);
1025 if (err < 0)
1026 goto failure;
1027 }
21a3479a 1028#endif
1da177e4
LT		 1029 oss_period_size *= oss_frame_size;
1030
1031 oss_buffer_size = oss_period_size * runtime->oss.periods;
7eaa943c
TI		 1032 if (oss_buffer_size < 0) {
1033 err = -EINVAL;
1034 goto failure;
1035 }
1da177e4
LT		 1036
1037 runtime->oss.period_bytes = oss_period_size;
1038 runtime->oss.buffer_bytes = oss_buffer_size;
1039
1040 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1041 runtime->oss.period_bytes,
1042 runtime->oss.buffer_bytes);
1043 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1044 params_period_size(sparams),
1045 params_buffer_size(sparams));
1046
1047 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1048 runtime->oss.channels = params_channels(params);
1049 runtime->oss.rate = params_rate(params);
1050
65766ee0
TI		 1051 kvfree(runtime->oss.buffer);
1052 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
cbbb0570
RK		 1053 if (!runtime->oss.buffer) {
1054 err = -ENOMEM;
1055 goto failure;
1056 }
1057
1058 runtime->oss.params = 0;
1059 runtime->oss.prepare = 1;
1da177e4
LT		 1060 runtime->oss.buffer_used = 0;
1061 if (runtime->dma_area)
1062 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1063
1064 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1065
1066 err = 0;
1067failure:
1068 kfree(sw_params);
1069 kfree(params);
1070 kfree(sparams);
02a5d692
TI		 1071 return err;
1072}
1073
1074/* this one takes the lock by itself */
1075static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1076 bool trylock)
1077{
1078 struct snd_pcm_runtime *runtime = substream->runtime;
1079 int err;
1080
1081 if (trylock) {
1082 if (!(mutex_trylock(&runtime->oss.params_lock)))
1083 return -EAGAIN;
1084 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1085 return -ERESTARTSYS;
1086
1087 err = snd_pcm_oss_change_params_locked(substream);
e3a5d59a 1088 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1089 return err;
1090}
1091
6ac77bc1 1092static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1093{
1094 int idx, err;
6ac77bc1 1095 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 1096
1097 for (idx = 0; idx < 2; idx++) {
1098 substream = pcm_oss_file->streams[idx];
1099 if (substream == NULL)
1100 continue;
1101 if (asubstream == NULL)
1102 asubstream = substream;
1103 if (substream->runtime->oss.params) {
b2483716 1104 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1105 if (err < 0)
1106 return err;
1107 }
1108 }
7eaa943c
TI		 1109 if (!asubstream)
1110 return -EIO;
1da177e4
LT		 1111 if (r_substream)
1112 *r_substream = asubstream;
1113 return 0;
1114}
1115
02a5d692 1116/* call with params_lock held */
e15dc99d
TI		 1117/* NOTE: this always call PREPARE unconditionally no matter whether
1118 * runtime->oss.prepare is set or not
1119 */
6ac77bc1 1120static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1121{
1122 int err;
6ac77bc1 1123 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1124
1125 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1126 if (err < 0) {
61efcee8
TI		 1127 pcm_dbg(substream->pcm,
1128 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1da177e4
LT		 1129 return err;
1130 }
1131 runtime->oss.prepare = 0;
f240406b 1132 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1133 runtime->oss.period_ptr = 0;
1134 runtime->oss.buffer_used = 0;
1135
1136 return 0;
1137}
1138
6ac77bc1 1139static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1140{
6ac77bc1 1141 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1142 int err;
1143
1da177e4
LT		 1144 runtime = substream->runtime;
1145 if (runtime->oss.params) {
b2483716 1146 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1147 if (err < 0)
1148 return err;
1149 }
02a5d692
TI		 1150 if (runtime->oss.prepare) {
1151 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1152 return -ERESTARTSYS;
1153 err = snd_pcm_oss_prepare(substream);
1154 mutex_unlock(&runtime->oss.params_lock);
1155 if (err < 0)
1156 return err;
1157 }
1158 return 0;
1159}
1160
1161/* call with params_lock held */
1162static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1163{
1164 struct snd_pcm_runtime *runtime;
1165 int err;
1166
1167 runtime = substream->runtime;
1168 if (runtime->oss.params) {
1169 err = snd_pcm_oss_change_params_locked(substream);
1170 if (err < 0)
1171 return err;
1172 }
1da177e4
LT		 1173 if (runtime->oss.prepare) {
1174 err = snd_pcm_oss_prepare(substream);
1175 if (err < 0)
1176 return err;
1177 }
1178 return 0;
1179}
1180
6ac77bc1 1181static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1182{
6ac77bc1 1183 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1184 snd_pcm_uframes_t frames;
1185 int err = 0;
1186
1187 while (1) {
1188 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1189 if (err < 0)
1190 break;
1191 runtime = substream->runtime;
1192 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1193 break;
1194 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1195 /* until avail(delay) <= buffer_size */
1196 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1197 frames /= runtime->period_size;
1198 frames *= runtime->period_size;
1199 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1200 if (err < 0)
1201 break;
1202 }
1203 return err;
1204}
1205
6ac77bc1 1206snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1207{
6ac77bc1 1208 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1209 int ret;
1210 while (1) {
1211 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1212 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1213#ifdef OSS_DEBUG
61efcee8
TI		 1214 pcm_dbg(substream->pcm,
1215 "pcm_oss: write: recovering from %s\n",
1216 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1217 "XRUN" : "SUSPEND");
1da177e4
LT		 1218#endif
1219 ret = snd_pcm_oss_prepare(substream);
1220 if (ret < 0)
1221 break;
1222 }
13f72c8c
TI		 1223 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1224 frames, in_kernel);
1da177e4
LT		 1225 if (ret != -EPIPE && ret != -ESTRPIPE)
1226 break;
1227 /* test, if we can't store new data, because the stream */
1228 /* has not been started */
1229 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1230 return -EAGAIN;
1231 }
1232 return ret;
1233}
1234
6ac77bc1 1235snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1236{
6ac77bc1 1237 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1238 snd_pcm_sframes_t delay;
1239 int ret;
1240 while (1) {
1241 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1242 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1243#ifdef OSS_DEBUG
61efcee8
TI		 1244 pcm_dbg(substream->pcm,
1245 "pcm_oss: read: recovering from %s\n",
1246 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1247 "XRUN" : "SUSPEND");
1da177e4
LT		 1248#endif
1249 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1250 if (ret < 0)
1251 break;
1252 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1253 ret = snd_pcm_oss_prepare(substream);
1254 if (ret < 0)
1255 break;
1256 }
1257 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1258 if (ret < 0)
1259 break;
13f72c8c
TI		 1260 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1261 frames, in_kernel);
1da177e4
LT		 1262 if (ret == -EPIPE) {
1263 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1264 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1265 if (ret < 0)
1266 break;
1267 }
1268 continue;
1269 }
1270 if (ret != -ESTRPIPE)
1271 break;
1272 }
1273 return ret;
1274}
1275
fed5794f
TI		 1276#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1277snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1da177e4 1278{
6ac77bc1 1279 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1280 int ret;
1281 while (1) {
1282 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1283 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1284#ifdef OSS_DEBUG
61efcee8
TI		 1285 pcm_dbg(substream->pcm,
1286 "pcm_oss: writev: recovering from %s\n",
1287 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1288 "XRUN" : "SUSPEND");
1da177e4
LT		 1289#endif
1290 ret = snd_pcm_oss_prepare(substream);
1291 if (ret < 0)
1292 break;
1293 }
fed5794f 1294 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1da177e4
LT		 1295 if (ret != -EPIPE && ret != -ESTRPIPE)
1296 break;
1297
1298 /* test, if we can't store new data, because the stream */
1299 /* has not been started */
1300 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1301 return -EAGAIN;
1302 }
1303 return ret;
1304}
1305
fed5794f 1306snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1da177e4 1307{
6ac77bc1 1308 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1309 int ret;
1310 while (1) {
1311 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1312 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1313#ifdef OSS_DEBUG
61efcee8
TI		 1314 pcm_dbg(substream->pcm,
1315 "pcm_oss: readv: recovering from %s\n",
1316 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1317 "XRUN" : "SUSPEND");
1da177e4
LT		 1318#endif
1319 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1320 if (ret < 0)
1321 break;
1322 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1323 ret = snd_pcm_oss_prepare(substream);
1324 if (ret < 0)
1325 break;
1326 }
fed5794f 1327 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1da177e4
LT		 1328 if (ret != -EPIPE && ret != -ESTRPIPE)
1329 break;
1330 }
1331 return ret;
1332}
fed5794f 1333#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 1334
6ac77bc1 1335static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1336{
6ac77bc1 1337 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1338 snd_pcm_sframes_t frames, frames1;
21a3479a 1339#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1340 if (runtime->oss.plugin_first) {
6ac77bc1 1341 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1342 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1343 if (!in_kernel) {
fea952e5 1344 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1da177e4
LT		 1345 return -EFAULT;
1346 buf = runtime->oss.buffer;
1347 }
1348 frames = bytes / oss_frame_bytes;
1349 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1350 if (frames1 < 0)
1351 return frames1;
1352 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1353 if (frames1 <= 0)
1354 return frames1;
1355 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 1356 } else
1357#endif
1358 {
1da177e4
LT		 1359 frames = bytes_to_frames(runtime, bytes);
1360 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1361 if (frames1 <= 0)
1362 return frames1;
1363 bytes = frames_to_bytes(runtime, frames1);
1364 }
1365 return bytes;
1366}
1367
6ac77bc1 1368static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1369{
1370 size_t xfer = 0;
5607dddb 1371 ssize_t tmp = 0;
6ac77bc1 1372 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1373
9c323fcb 1374 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1375 return -ENXIO;
1376
40cab6e8 1377 atomic_inc(&runtime->oss.rw_ref);
1da177e4 1378 while (bytes > 0) {
900498a3
TI		 1379 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1380 tmp = -ERESTARTSYS;
1381 break;
1382 }
02a5d692
TI		 1383 tmp = snd_pcm_oss_make_ready_locked(substream);
1384 if (tmp < 0)
1385 goto err;
1da177e4
LT		 1386 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1387 tmp = bytes;
1388 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1389 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1390 if (tmp > 0) {
e3a5d59a
TI		 1391 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1392 tmp = -EFAULT;
1393 goto err;
1394 }
1da177e4
LT		 1395 }
1396 runtime->oss.buffer_used += tmp;
1397 buf += tmp;
1398 bytes -= tmp;
1399 xfer += tmp;
060d77b9 1400 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 1401 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1402 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1403 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1404 if (tmp <= 0)
e3a5d59a 1405 goto err;
1da177e4
LT		 1406 runtime->oss.bytes += tmp;
1407 runtime->oss.period_ptr += tmp;
1408 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1409 if (runtime->oss.period_ptr == 0 ||
1410 runtime->oss.period_ptr == runtime->oss.buffer_used)
1411 runtime->oss.buffer_used = 0;
e3a5d59a
TI		 1412 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1413 tmp = -EAGAIN;
1414 goto err;
1415 }
1da177e4
LT		 1416 }
1417 } else {
4d23359b
CL		 1418 tmp = snd_pcm_oss_write2(substream,
1419 (const char __force *)buf,
1420 runtime->oss.period_bytes, 0);
1da177e4 1421 if (tmp <= 0)
e3a5d59a 1422 goto err;
1da177e4
LT		 1423 runtime->oss.bytes += tmp;
1424 buf += tmp;
1425 bytes -= tmp;
1426 xfer += tmp;
0df63e44 1427 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4 1428 tmp != runtime->oss.period_bytes)
900498a3 1429 tmp = -EAGAIN;
1da177e4 1430 }
e3a5d59a 1431 err:
900498a3
TI		 1432 mutex_unlock(&runtime->oss.params_lock);
1433 if (tmp < 0)
1434 break;
29159a4e
TI		 1435 if (signal_pending(current)) {
1436 tmp = -ERESTARTSYS;
900498a3 1437 break;
29159a4e 1438 }
900498a3 1439 tmp = 0;
1da177e4 1440 }
40cab6e8 1441 atomic_dec(&runtime->oss.rw_ref);
e3a5d59a 1442 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1443}
1444
6ac77bc1 1445static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1446{
6ac77bc1 1447 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1448 snd_pcm_sframes_t frames, frames1;
21a3479a 1449#ifdef CONFIG_SND_PCM_OSS_PLUGINS
fea952e5 1450 char __user *final_dst = (char __force __user *)buf;
1da177e4 1451 if (runtime->oss.plugin_first) {
6ac77bc1 1452 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1453 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1454 if (!in_kernel)
1455 buf = runtime->oss.buffer;
1456 frames = bytes / oss_frame_bytes;
1457 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1458 if (frames1 < 0)
1459 return frames1;
1460 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1461 if (frames1 <= 0)
1462 return frames1;
1463 bytes = frames1 * oss_frame_bytes;
1464 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1465 return -EFAULT;
21a3479a
JK		 1466 } else
1467#endif
1468 {
1da177e4
LT		 1469 frames = bytes_to_frames(runtime, bytes);
1470 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1471 if (frames1 <= 0)
1472 return frames1;
1473 bytes = frames_to_bytes(runtime, frames1);
1474 }
1475 return bytes;
1476}
1477
6ac77bc1 1478static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1479{
1480 size_t xfer = 0;
5607dddb 1481 ssize_t tmp = 0;
6ac77bc1 1482 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1483
9c323fcb 1484 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1485 return -ENXIO;
1486
40cab6e8 1487 atomic_inc(&runtime->oss.rw_ref);
1da177e4 1488 while (bytes > 0) {
900498a3
TI		 1489 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1490 tmp = -ERESTARTSYS;
1491 break;
1492 }
02a5d692
TI		 1493 tmp = snd_pcm_oss_make_ready_locked(substream);
1494 if (tmp < 0)
1495 goto err;
1da177e4
LT		 1496 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1497 if (runtime->oss.buffer_used == 0) {
1498 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1499 if (tmp <= 0)
e3a5d59a 1500 goto err;
1da177e4
LT		 1501 runtime->oss.bytes += tmp;
1502 runtime->oss.period_ptr = tmp;
1503 runtime->oss.buffer_used = tmp;
1504 }
1505 tmp = bytes;
1506 if ((size_t) tmp > runtime->oss.buffer_used)
1507 tmp = runtime->oss.buffer_used;
e3a5d59a
TI		 1508 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1509 tmp = -EFAULT;
1510 goto err;
1511 }
1da177e4
LT		 1512 buf += tmp;
1513 bytes -= tmp;
1514 xfer += tmp;
1515 runtime->oss.buffer_used -= tmp;
1516 } else {
4d23359b
CL		 1517 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1518 runtime->oss.period_bytes, 0);
1da177e4 1519 if (tmp <= 0)
e3a5d59a 1520 goto err;
1da177e4
LT		 1521 runtime->oss.bytes += tmp;
1522 buf += tmp;
1523 bytes -= tmp;
1524 xfer += tmp;
1525 }
e3a5d59a 1526 err:
900498a3
TI		 1527 mutex_unlock(&runtime->oss.params_lock);
1528 if (tmp < 0)
1529 break;
29159a4e
TI		 1530 if (signal_pending(current)) {
1531 tmp = -ERESTARTSYS;
900498a3 1532 break;
29159a4e 1533 }
900498a3 1534 tmp = 0;
1da177e4 1535 }
40cab6e8 1536 atomic_dec(&runtime->oss.rw_ref);
e3a5d59a 1537 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1538}
1539
6ac77bc1 1540static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1541{
6ac77bc1 1542 struct snd_pcm_substream *substream;
60686aa0
TI		 1543 struct snd_pcm_runtime *runtime;
1544 int i;
1da177e4 1545
60686aa0
TI		 1546 for (i = 0; i < 2; i++) {
1547 substream = pcm_oss_file->streams[i];
1548 if (!substream)
1549 continue;
1550 runtime = substream->runtime;
bf1bbb5a 1551 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
02a5d692 1552 mutex_lock(&runtime->oss.params_lock);
60686aa0
TI		 1553 runtime->oss.prepare = 1;
1554 runtime->oss.buffer_used = 0;
1555 runtime->oss.prev_hw_ptr_period = 0;
1556 runtime->oss.period_ptr = 0;
02a5d692 1557 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1558 }
1559 return 0;
1560}
1561
6ac77bc1 1562static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1563{
6ac77bc1 1564 struct snd_pcm_substream *substream;
1da177e4
LT		 1565 int err;
1566
1567 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1568 if (substream != NULL) {
1569 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1570 return err;
bf1bbb5a 1571 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 1572 }
1573 /* note: all errors from the start action are ignored */
1574 /* OSS apps do not know, how to handle them */
1575 return 0;
1576}
1577
6ac77bc1 1578static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1579{
6ac77bc1 1580 struct snd_pcm_runtime *runtime;
1da177e4 1581 ssize_t result = 0;
fea952e5 1582 snd_pcm_state_t state;
1da177e4 1583 long res;
ac6424b9 1584 wait_queue_entry_t wait;
1da177e4
LT		 1585
1586 runtime = substream->runtime;
1587 init_waitqueue_entry(&wait, current);
1588 add_wait_queue(&runtime->sleep, &wait);
1589#ifdef OSS_DEBUG
61efcee8 1590 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1da177e4
LT		 1591#endif
1592 while (1) {
1593 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1594 if (result > 0) {
1595 runtime->oss.buffer_used = 0;
1596 result = 0;
1597 break;
1598 }
1599 if (result != 0 && result != -EAGAIN)
1600 break;
1601 result = 0;
1602 set_current_state(TASK_INTERRUPTIBLE);
1603 snd_pcm_stream_lock_irq(substream);
fea952e5 1604 state = runtime->status->state;
1da177e4 1605 snd_pcm_stream_unlock_irq(substream);
fea952e5 1606 if (state != SNDRV_PCM_STATE_RUNNING) {
1da177e4
LT		 1607 set_current_state(TASK_RUNNING);
1608 break;
1609 }
1610 res = schedule_timeout(10 * HZ);
1611 if (signal_pending(current)) {
1612 result = -ERESTARTSYS;
1613 break;
1614 }
1615 if (res == 0) {
61efcee8
TI		 1616 pcm_err(substream->pcm,
1617 "OSS sync error - DMA timeout\n");
1da177e4
LT		 1618 result = -EIO;
1619 break;
1620 }
1621 }
1622 remove_wait_queue(&runtime->sleep, &wait);
1623 return result;
1624}
1625
6ac77bc1 1626static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1627{
1628 int err = 0;
1629 unsigned int saved_f_flags;
6ac77bc1
TI		 1630 struct snd_pcm_substream *substream;
1631 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1632 snd_pcm_format_t format;
1633 unsigned long width;
1634 size_t size;
1635
1636 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1637 if (substream != NULL) {
1638 runtime = substream->runtime;
9c323fcb 1639 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1640 goto __direct;
1641 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1642 return err;
40cab6e8
TI		 1643 atomic_inc(&runtime->oss.rw_ref);
1644 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1645 atomic_dec(&runtime->oss.rw_ref);
02a5d692 1646 return -ERESTARTSYS;
40cab6e8 1647 }
1da177e4
LT		 1648 format = snd_pcm_oss_format_from(runtime->oss.format);
1649 width = snd_pcm_format_physical_width(format);
1650 if (runtime->oss.buffer_used > 0) {
1651#ifdef OSS_DEBUG
61efcee8 1652 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1da177e4
LT		 1653#endif
1654 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1655 snd_pcm_format_set_silence(format,
1656 runtime->oss.buffer + runtime->oss.buffer_used,
1657 size);
1658 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
40cab6e8
TI		 1659 if (err < 0)
1660 goto unlock;
1da177e4
LT		 1661 } else if (runtime->oss.period_ptr > 0) {
1662#ifdef OSS_DEBUG
61efcee8 1663 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1da177e4
LT		 1664#endif
1665 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1666 snd_pcm_format_set_silence(format,
1667 runtime->oss.buffer,
1668 size * 8 / width);
1669 err = snd_pcm_oss_sync1(substream, size);
40cab6e8
TI		 1670 if (err < 0)
1671 goto unlock;
1da177e4
LT		 1672 }
1673 /*
1674 * The ALSA's period might be a bit large than OSS one.
1675 * Fill the remain portion of ALSA period with zeros.
1676 */
1677 size = runtime->control->appl_ptr % runtime->period_size;
1678 if (size > 0) {
1679 size = runtime->period_size - size;
13f72c8c
TI		 1680 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1681 snd_pcm_lib_write(substream, NULL, size);
1682 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1683 snd_pcm_lib_writev(substream, NULL, size);
1da177e4 1684 }
40cab6e8 1685unlock:
e3a5d59a 1686 mutex_unlock(&runtime->oss.params_lock);
40cab6e8
TI		 1687 atomic_dec(&runtime->oss.rw_ref);
1688 if (err < 0)
1689 return err;
1da177e4
LT		 1690 /*
1691 * finish sync: drain the buffer
1692 */
1693 __direct:
0df63e44
TI		 1694 saved_f_flags = substream->f_flags;
1695 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1696 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1697 substream->f_flags = saved_f_flags;
1da177e4
LT		 1698 if (err < 0)
1699 return err;
02a5d692 1700 mutex_lock(&runtime->oss.params_lock);
1da177e4 1701 runtime->oss.prepare = 1;
02a5d692 1702 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1703 }
1704
1705 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1706 if (substream != NULL) {
1707 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1708 return err;
1709 runtime = substream->runtime;
bf1bbb5a 1710 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1711 if (err < 0)
1712 return err;
02a5d692 1713 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1714 runtime->oss.buffer_used = 0;
1715 runtime->oss.prepare = 1;
02a5d692 1716 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1717 }
1718 return 0;
1719}
1720
6ac77bc1 1721static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1722{
1723 int idx;
1724
1725 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1726 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1727 struct snd_pcm_runtime *runtime;
f6d297df
TI		 1728 int err;
1729
1da177e4
LT		 1730 if (substream == NULL)
1731 continue;
1732 runtime = substream->runtime;
1733 if (rate < 1000)
1734 rate = 1000;
1735 else if (rate > 192000)
1736 rate = 192000;
f6d297df
TI		 1737 err = lock_params(runtime);
1738 if (err < 0)
1739 return err;
1da177e4
LT		 1740 if (runtime->oss.rate != rate) {
1741 runtime->oss.params = 1;
1742 runtime->oss.rate = rate;
1743 }
f6d297df 1744 unlock_params(runtime);
1da177e4
LT		 1745 }
1746 return snd_pcm_oss_get_rate(pcm_oss_file);
1747}
1748
6ac77bc1 1749static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1750{
6ac77bc1 1751 struct snd_pcm_substream *substream;
1da177e4
LT		 1752 int err;
1753
1754 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1755 return err;
1756 return substream->runtime->oss.rate;
1757}
1758
6ac77bc1 1759static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1760{
1761 int idx;
1762 if (channels < 1)
1763 channels = 1;
1764 if (channels > 128)
1765 return -EINVAL;
1766 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1767 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1768 struct snd_pcm_runtime *runtime;
f6d297df
TI		 1769 int err;
1770
1da177e4
LT		 1771 if (substream == NULL)
1772 continue;
1773 runtime = substream->runtime;
f6d297df
TI		 1774 err = lock_params(runtime);
1775 if (err < 0)
1776 return err;
1da177e4
LT		 1777 if (runtime->oss.channels != channels) {
1778 runtime->oss.params = 1;
1779 runtime->oss.channels = channels;
1780 }
f6d297df 1781 unlock_params(runtime);
1da177e4
LT		 1782 }
1783 return snd_pcm_oss_get_channels(pcm_oss_file);
1784}
1785
6ac77bc1 1786static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1787{
6ac77bc1 1788 struct snd_pcm_substream *substream;
1da177e4
LT		 1789 int err;
1790
1791 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1792 return err;
1793 return substream->runtime->oss.channels;
1794}
1795
6ac77bc1 1796static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1797{
6ac77bc1 1798 struct snd_pcm_substream *substream;
1da177e4
LT		 1799 int err;
1800
1801 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1802 return err;
1803 return substream->runtime->oss.period_bytes;
1804}
1805
6ac77bc1 1806static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1807{
6ac77bc1 1808 struct snd_pcm_substream *substream;
1da177e4
LT		 1809 int err;
1810 int direct;
6ac77bc1 1811 struct snd_pcm_hw_params *params;
1da177e4 1812 unsigned int formats = 0;
e76bf3c4 1813 const struct snd_mask *format_mask;
1da177e4
LT		 1814 int fmt;
1815
1816 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1817 return err;
9c323fcb 1818 if (atomic_read(&substream->mmap_count))
1da177e4 1819 direct = 1;
060d77b9
TI		 1820 else
1821 direct = substream->oss.setup.direct;
1da177e4
LT		 1822 if (!direct)
1823 return AFMT_MU_LAW | AFMT_U8 |
1824 AFMT_S16_LE | AFMT_S16_BE |
1825 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1826 AFMT_U16_BE |
1827 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1828 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1829 AFMT_S24_PACKED;
1da177e4
LT		 1830 params = kmalloc(sizeof(*params), GFP_KERNEL);
1831 if (!params)
1832 return -ENOMEM;
1833 _snd_pcm_hw_params_any(params);
1834 err = snd_pcm_hw_refine(substream, params);
7eaa943c 1835 if (err < 0)
01c0b426
TI		 1836 goto error;
1837 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4 1838 for (fmt = 0; fmt < 32; ++fmt) {
e76bf3c4 1839 if (snd_mask_test(format_mask, fmt)) {
f8b6c0cf 1840 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1da177e4
LT		 1841 if (f >= 0)
1842 formats |= f;
1843 }
1844 }
01c0b426
TI		 1845
1846 error:
1847 kfree(params);
1848 return err < 0 ? err : formats;
1da177e4
LT		 1849}
1850
6ac77bc1 1851static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1852{
1853 int formats, idx;
f6d297df 1854 int err;
1da177e4
LT		 1855
1856 if (format != AFMT_QUERY) {
1857 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1858 if (formats < 0)
1859 return formats;
1da177e4
LT		 1860 if (!(formats & format))
1861 format = AFMT_U8;
1862 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1863 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1864 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1865 if (substream == NULL)
1866 continue;
1867 runtime = substream->runtime;
f6d297df
TI		 1868 err = lock_params(runtime);
1869 if (err < 0)
1870 return err;
1da177e4
LT		 1871 if (runtime->oss.format != format) {
1872 runtime->oss.params = 1;
1873 runtime->oss.format = format;
1874 }
f6d297df 1875 unlock_params(runtime);
1da177e4
LT		 1876 }
1877 }
1878 return snd_pcm_oss_get_format(pcm_oss_file);
1879}
1880
6ac77bc1 1881static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1882{
6ac77bc1 1883 struct snd_pcm_substream *substream;
1da177e4
LT		 1884 int err;
1885
1886 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1887 return err;
1888 return substream->runtime->oss.format;
1889}
1890
6ac77bc1 1891static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1892{
6ac77bc1 1893 struct snd_pcm_runtime *runtime;
1da177e4 1894
1da177e4
LT		 1895 runtime = substream->runtime;
1896 if (subdivide == 0) {
1897 subdivide = runtime->oss.subdivision;
1898 if (subdivide == 0)
1899 subdivide = 1;
1900 return subdivide;
1901 }
1902 if (runtime->oss.subdivision || runtime->oss.fragshift)
1903 return -EINVAL;
1904 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1905 subdivide != 8 && subdivide != 16)
1906 return -EINVAL;
1907 runtime->oss.subdivision = subdivide;
1908 runtime->oss.params = 1;
1909 return subdivide;
1910}
1911
6ac77bc1 1912static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1913{
1914 int err = -EINVAL, idx;
1915
1916 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1917 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
02a5d692
TI		 1918 struct snd_pcm_runtime *runtime;
1919
1da177e4
LT		 1920 if (substream == NULL)
1921 continue;
02a5d692 1922 runtime = substream->runtime;
f6d297df
TI		 1923 err = lock_params(runtime);
1924 if (err < 0)
1925 return err;
02a5d692 1926 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
f6d297df 1927 unlock_params(runtime);
02a5d692 1928 if (err < 0)
1da177e4
LT		 1929 return err;
1930 }
1931 return err;
1932}
1933
6ac77bc1 1934static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1935{
6ac77bc1 1936 struct snd_pcm_runtime *runtime;
1da177e4 1937
1da177e4
LT		 1938 runtime = substream->runtime;
1939 if (runtime->oss.subdivision || runtime->oss.fragshift)
1940 return -EINVAL;
1941 runtime->oss.fragshift = val & 0xffff;
1942 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1943 if (runtime->oss.fragshift < 4) /* < 16 */
1944 runtime->oss.fragshift = 4;
1945 if (runtime->oss.maxfrags < 2)
1946 runtime->oss.maxfrags = 2;
1947 runtime->oss.params = 1;
1948 return 0;
1949}
1950
6ac77bc1 1951static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1952{
1953 int err = -EINVAL, idx;
1954
1955 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1956 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
02a5d692
TI		 1957 struct snd_pcm_runtime *runtime;
1958
1da177e4
LT		 1959 if (substream == NULL)
1960 continue;
02a5d692 1961 runtime = substream->runtime;
f6d297df
TI		 1962 err = lock_params(runtime);
1963 if (err < 0)
1964 return err;
02a5d692 1965 err = snd_pcm_oss_set_fragment1(substream, val);
f6d297df 1966 unlock_params(runtime);
02a5d692 1967 if (err < 0)
1da177e4
LT		 1968 return err;
1969 }
1970 return err;
1971}
1972
1973static int snd_pcm_oss_nonblock(struct file * file)
1974{
db1dd4d3 1975 spin_lock(&file->f_lock);
1da177e4 1976 file->f_flags |= O_NONBLOCK;
db1dd4d3 1977 spin_unlock(&file->f_lock);
1da177e4
LT		 1978 return 0;
1979}
1980
6ac77bc1 1981static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1982{
1983
1984 if (substream == NULL) {
1985 res &= ~DSP_CAP_DUPLEX;
1986 return res;
1987 }
1988#ifdef DSP_CAP_MULTI
1989 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1990 if (substream->pstr->substream_count > 1)
1991 res |= DSP_CAP_MULTI;
1992#endif
1993 /* DSP_CAP_REALTIME is set all times: */
1994 /* all ALSA drivers can return actual pointer in ring buffer */
1995#if defined(DSP_CAP_REALTIME) && 0
1996 {
6ac77bc1 1997 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1998 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1999 res &= ~DSP_CAP_REALTIME;
2000 }
2001#endif
2002 return res;
2003}
2004
6ac77bc1 2005static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2006{
2007 int result, idx;
2008
2009 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2010 for (idx = 0; idx < 2; idx++) {
6ac77bc1 2011 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 2012 result = snd_pcm_oss_get_caps1(substream, result);
2013 }
2014 result |= 0x0001; /* revision - same as SB AWE 64 */
2015 return result;
2016}
2017
f240406b
JK		 2018static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2019 snd_pcm_uframes_t hw_ptr)
1da177e4 2020{
6ac77bc1 2021 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2022 snd_pcm_uframes_t appl_ptr;
2023 appl_ptr = hw_ptr + runtime->buffer_size;
2024 appl_ptr %= runtime->boundary;
2025 runtime->control->appl_ptr = appl_ptr;
2026}
2027
6ac77bc1 2028static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 2029{
6ac77bc1
TI		 2030 struct snd_pcm_runtime *runtime;
2031 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2032 int err, cmd;
2033
2034#ifdef OSS_DEBUG
61efcee8 2035 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 2036#endif
2037
2038 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2039 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2040
2041 if (psubstream) {
2042 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2043 return err;
2044 }
2045 if (csubstream) {
2046 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2047 return err;
2048 }
2049 if (psubstream) {
2050 runtime = psubstream->runtime;
02a5d692
TI		 2051 cmd = 0;
2052 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2053 return -ERESTARTSYS;
1da177e4
LT		 2054 if (trigger & PCM_ENABLE_OUTPUT) {
2055 if (runtime->oss.trigger)
2056 goto _skip1;
9c323fcb 2057 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 2058 snd_pcm_oss_simulate_fill(psubstream,
2059 get_hw_ptr_period(runtime));
1da177e4
LT		 2060 runtime->oss.trigger = 1;
2061 runtime->start_threshold = 1;
2062 cmd = SNDRV_PCM_IOCTL_START;
2063 } else {
2064 if (!runtime->oss.trigger)
2065 goto _skip1;
2066 runtime->oss.trigger = 0;
2067 runtime->start_threshold = runtime->boundary;
2068 cmd = SNDRV_PCM_IOCTL_DROP;
2069 runtime->oss.prepare = 1;
2070 }
1da177e4 2071 _skip1:
02a5d692
TI		 2072 mutex_unlock(&runtime->oss.params_lock);
2073 if (cmd) {
2074 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2075 if (err < 0)
2076 return err;
2077 }
2078 }
1da177e4
LT		 2079 if (csubstream) {
2080 runtime = csubstream->runtime;
02a5d692
TI		 2081 cmd = 0;
2082 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2083 return -ERESTARTSYS;
1da177e4
LT		 2084 if (trigger & PCM_ENABLE_INPUT) {
2085 if (runtime->oss.trigger)
2086 goto _skip2;
2087 runtime->oss.trigger = 1;
2088 runtime->start_threshold = 1;
2089 cmd = SNDRV_PCM_IOCTL_START;
2090 } else {
2091 if (!runtime->oss.trigger)
2092 goto _skip2;
2093 runtime->oss.trigger = 0;
2094 runtime->start_threshold = runtime->boundary;
2095 cmd = SNDRV_PCM_IOCTL_DROP;
2096 runtime->oss.prepare = 1;
2097 }
1da177e4 2098 _skip2:
02a5d692
TI		 2099 mutex_unlock(&runtime->oss.params_lock);
2100 if (cmd) {
2101 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2102 if (err < 0)
2103 return err;
2104 }
2105 }
1da177e4
LT		 2106 return 0;
2107}
2108
6ac77bc1 2109static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2110{
6ac77bc1 2111 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2112 int result = 0;
2113
2114 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2115 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2116 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2117 result |= PCM_ENABLE_OUTPUT;
2118 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2119 result |= PCM_ENABLE_INPUT;
2120 return result;
2121}
2122
6ac77bc1 2123static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2124{
6ac77bc1
TI		 2125 struct snd_pcm_substream *substream;
2126 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2127 snd_pcm_sframes_t delay;
2128 int err;
2129
2130 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2131 if (substream == NULL)
2132 return -EINVAL;
2133 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2134 return err;
2135 runtime = substream->runtime;
2136 if (runtime->oss.params || runtime->oss.prepare)
2137 return 0;
bf1bbb5a 2138 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 2139 if (err == -EPIPE)
2140 delay = 0; /* hack for broken OSS applications */
2141 else if (err < 0)
2142 return err;
2143 return snd_pcm_oss_bytes(substream, delay);
2144}
2145
6ac77bc1 2146static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2147{
6ac77bc1
TI		 2148 struct snd_pcm_substream *substream;
2149 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2150 snd_pcm_sframes_t delay;
2151 int fixup;
2152 struct count_info info;
2153 int err;
2154
2155 if (_info == NULL)
2156 return -EFAULT;
2157 substream = pcm_oss_file->streams[stream];
2158 if (substream == NULL)
2159 return -EINVAL;
2160 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2161 return err;
2162 runtime = substream->runtime;
2163 if (runtime->oss.params || runtime->oss.prepare) {
2164 memset(&info, 0, sizeof(info));
2165 if (copy_to_user(_info, &info, sizeof(info)))
2166 return -EFAULT;
2167 return 0;
2168 }
2169 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2170 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2171 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2172 err = 0;
2173 delay = 0;
2174 fixup = 0;
2175 } else {
2176 fixup = runtime->oss.buffer_used;
2177 }
2178 } else {
2179 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2180 fixup = -runtime->oss.buffer_used;
2181 }
2182 if (err < 0)
2183 return err;
2184 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
9c323fcb 2185 if (atomic_read(&substream->mmap_count)) {
1da177e4 2186 snd_pcm_sframes_t n;
f240406b
JK		 2187 delay = get_hw_ptr_period(runtime);
2188 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2189 if (n < 0)
2190 n += runtime->boundary;
2191 info.blocks = n / runtime->period_size;
f240406b 2192 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 2193 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2194 snd_pcm_oss_simulate_fill(substream, delay);
2195 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2196 } else {
5ac0fab9 2197 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2198 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2199 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2200 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2201 else
2202 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2203 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2204 } else {
5ac0fab9
JK		 2205 delay += fixup;
2206 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2207 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2208 }
1da177e4
LT		 2209 }
2210 if (copy_to_user(_info, &info, sizeof(info)))
2211 return -EFAULT;
2212 return 0;
2213}
2214
6ac77bc1 2215static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2216{
6ac77bc1
TI		 2217 struct snd_pcm_substream *substream;
2218 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2219 snd_pcm_sframes_t avail;
2220 int fixup;
2221 struct audio_buf_info info;
2222 int err;
2223
2224 if (_info == NULL)
2225 return -EFAULT;
2226 substream = pcm_oss_file->streams[stream];
2227 if (substream == NULL)
2228 return -EINVAL;
2229 runtime = substream->runtime;
2230
2231 if (runtime->oss.params &&
b2483716 2232 (err = snd_pcm_oss_change_params(substream, false)) < 0)
1da177e4
LT		 2233 return err;
2234
2235 info.fragsize = runtime->oss.period_bytes;
2236 info.fragstotal = runtime->periods;
2237 if (runtime->oss.prepare) {
2238 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2239 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2240 info.fragments = runtime->oss.periods;
2241 } else {
2242 info.bytes = 0;
2243 info.fragments = 0;
2244 }
2245 } else {
2246 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2247 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2248 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2249 avail = runtime->buffer_size;
2250 err = 0;
2251 fixup = 0;
2252 } else {
2253 avail = runtime->buffer_size - avail;
2254 fixup = -runtime->oss.buffer_used;
2255 }
2256 } else {
2257 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2258 fixup = runtime->oss.buffer_used;
2259 }
2260 if (err < 0)
2261 return err;
2262 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2263 info.fragments = info.bytes / runtime->oss.period_bytes;
2264 }
2265
2266#ifdef OSS_DEBUG
61efcee8
TI		 2267 pcm_dbg(substream->pcm,
2268 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2269 info.bytes, info.fragments, info.fragstotal, info.fragsize);
1da177e4
LT		 2270#endif
2271 if (copy_to_user(_info, &info, sizeof(info)))
2272 return -EFAULT;
2273 return 0;
2274}
2275
6ac77bc1 2276static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2277{
2278 // it won't be probably implemented
61efcee8 2279 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
1da177e4
LT		 2280 return -EINVAL;
2281}
2282
060d77b9 2283static const char *strip_task_path(const char *path)
1da177e4 2284{
060d77b9
TI		 2285 const char *ptr, *ptrl = NULL;
2286 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2287 if (*ptr == '/')
2288 ptrl = ptr + 1;
1da177e4 2289 }
060d77b9
TI		 2290 return ptrl;
2291}
2292
2293static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2294 const char *task_name,
2295 struct snd_pcm_oss_setup *rsetup)
2296{
2297 struct snd_pcm_oss_setup *setup;
2298
2299 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2300 do {
2301 for (setup = pcm->streams[stream].oss.setup_list; setup;
2302 setup = setup->next) {
2303 if (!strcmp(setup->task_name, task_name))
2304 goto out;
1da177e4 2305 }
060d77b9
TI		 2306 } while ((task_name = strip_task_path(task_name)) != NULL);
2307 out:
2308 if (setup)
2309 *rsetup = *setup;
1a60d4c5 2310 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 2311}
2312
3bf75f9b
TI		 2313static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2314{
2315 struct snd_pcm_runtime *runtime;
2316 runtime = substream->runtime;
65766ee0 2317 kvfree(runtime->oss.buffer);
3bf75f9b
TI		 2318 runtime->oss.buffer = NULL;
2319#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2320 snd_pcm_oss_plugin_clear(substream);
2321#endif
2322 substream->oss.oss = 0;
2323}
2324
6ac77bc1
TI		 2325static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2326 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2327 int minor)
2328{
6ac77bc1 2329 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2330
2331 substream->oss.oss = 1;
060d77b9 2332 substream->oss.setup = *setup;
3bf75f9b 2333 if (setup->nonblock)
0df63e44 2334 substream->f_flags |= O_NONBLOCK;
1576274d 2335 else if (setup->block)
0df63e44 2336 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2337 runtime = substream->runtime;
2338 runtime->oss.params = 1;
2339 runtime->oss.trigger = 1;
2340 runtime->oss.rate = 8000;
e3a5d59a 2341 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 2342 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2343 case SNDRV_MINOR_OSS_PCM_8:
2344 runtime->oss.format = AFMT_U8;
2345 break;
2346 case SNDRV_MINOR_OSS_PCM_16:
2347 runtime->oss.format = AFMT_S16_LE;
2348 break;
2349 default:
2350 runtime->oss.format = AFMT_MU_LAW;
2351 }
2352 runtime->oss.channels = 1;
2353 runtime->oss.fragshift = 0;
2354 runtime->oss.maxfrags = 0;
2355 runtime->oss.subdivision = 0;
3bf75f9b 2356 substream->pcm_release = snd_pcm_oss_release_substream;
40cab6e8 2357 atomic_set(&runtime->oss.rw_ref, 0);
1da177e4
LT		 2358}
2359
6ac77bc1 2360static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2361{
2362 int cidx;
7eaa943c
TI		 2363 if (!pcm_oss_file)
2364 return 0;
1da177e4 2365 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2366 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2367 if (substream)
2368 snd_pcm_release_substream(substream);
1da177e4
LT		 2369 }
2370 kfree(pcm_oss_file);
2371 return 0;
2372}
2373
2374static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2375 struct snd_pcm *pcm,
2376 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2377 int minor,
060d77b9 2378 struct snd_pcm_oss_setup *setup)
1da177e4 2379{
3bf75f9b 2380 int idx, err;
6ac77bc1 2381 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2382 struct snd_pcm_substream *substream;
aeb5d727 2383 fmode_t f_mode = file->f_mode;
1da177e4 2384
7eaa943c
TI		 2385 if (rpcm_oss_file)
2386 *rpcm_oss_file = NULL;
1da177e4 2387
ca2c0966 2388 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 2389 if (pcm_oss_file == NULL)
2390 return -ENOMEM;
2391
2392 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2393 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2394 f_mode = FMODE_WRITE;
3bf75f9b 2395
0df63e44 2396 file->f_flags &= ~O_APPEND;
3bf75f9b 2397 for (idx = 0; idx < 2; idx++) {
060d77b9 2398 if (setup[idx].disable)
3bf75f9b 2399 continue;
6cb53e7e
TI		 2400 if (! pcm->streams[idx].substream_count)
2401 continue; /* no matching substream */
3bf75f9b
TI		 2402 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2403 if (! (f_mode & FMODE_WRITE))
2404 continue;
2405 } else {
2406 if (! (f_mode & FMODE_READ))
2407 continue;
2408 }
2409 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2410 if (err < 0) {
1da177e4
LT		 2411 snd_pcm_oss_release_file(pcm_oss_file);
2412 return err;
2413 }
3bf75f9b
TI		 2414
2415 pcm_oss_file->streams[idx] = substream;
060d77b9 2416 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2417 }
2418
bbdc1b7d 2419 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2420 snd_pcm_oss_release_file(pcm_oss_file);
2421 return -EINVAL;
2422 }
1da177e4
LT		 2423
2424 file->private_data = pcm_oss_file;
7eaa943c
TI		 2425 if (rpcm_oss_file)
2426 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2427 return 0;
2428}
2429
2430
93f2e378
TI		 2431static int snd_task_name(struct task_struct *task, char *name, size_t size)
2432{
2433 unsigned int idx;
2434
7eaa943c
TI		 2435 if (snd_BUG_ON(!task || !name || size < 2))
2436 return -EINVAL;
93f2e378
TI		 2437 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2438 name[idx] = task->comm[idx];
2439 name[idx] = '\0';
2440 return 0;
2441}
2442
1da177e4
LT		 2443static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2444{
1da177e4
LT		 2445 int err;
2446 char task_name[32];
6ac77bc1
TI		 2447 struct snd_pcm *pcm;
2448 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2449 struct snd_pcm_oss_setup setup[2];
1da177e4 2450 int nonblock;
ac6424b9 2451 wait_queue_entry_t wait;
1da177e4 2452
02f4865f
TI		 2453 err = nonseekable_open(inode, file);
2454 if (err < 0)
2455 return err;
2456
f87135f5
CL		 2457 pcm = snd_lookup_oss_minor_data(iminor(inode),
2458 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 2459 if (pcm == NULL) {
2460 err = -ENODEV;
2461 goto __error1;
2462 }
2463 err = snd_card_file_add(pcm->card, file);
2464 if (err < 0)
2465 goto __error1;
2466 if (!try_module_get(pcm->card->module)) {
2467 err = -EFAULT;
2468 goto __error2;
2469 }
2470 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2471 err = -EFAULT;
2472 goto __error;
2473 }
1576274d 2474 memset(setup, 0, sizeof(setup));
1da177e4 2475 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2476 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2477 task_name, &setup[0]);
1da177e4 2478 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2479 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2480 task_name, &setup[1]);
1da177e4
LT		 2481
2482 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2483 if (!nonblock)
2484 nonblock = nonblock_open;
2485
2486 init_waitqueue_entry(&wait, current);
2487 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2488 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2489 while (1) {
2490 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2491 iminor(inode), setup);
1da177e4
LT		 2492 if (err >= 0)
2493 break;
2494 if (err == -EAGAIN) {
2495 if (nonblock) {
2496 err = -EBUSY;
2497 break;
2498 }
2499 } else
2500 break;
2501 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2502 mutex_unlock(&pcm->open_mutex);
1da177e4 2503 schedule();
1a60d4c5 2504 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2505 if (pcm->card->shutdown) {
2506 err = -ENODEV;
2507 break;
2508 }
1da177e4
LT		 2509 if (signal_pending(current)) {
2510 err = -ERESTARTSYS;
2511 break;
2512 }
2513 }
2514 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2515 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2516 if (err < 0)
2517 goto __error;
8bb4d9ce 2518 snd_card_unref(pcm->card);
1da177e4
LT		 2519 return err;
2520
2521 __error:
2522 module_put(pcm->card->module);
2523 __error2:
2524 snd_card_file_remove(pcm->card, file);
2525 __error1:
a0830dbd
TI		 2526 if (pcm)
2527 snd_card_unref(pcm->card);
1da177e4
LT		 2528 return err;
2529}
2530
2531static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2532{
6ac77bc1
TI		 2533 struct snd_pcm *pcm;
2534 struct snd_pcm_substream *substream;
2535 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2536
2537 pcm_oss_file = file->private_data;
2538 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2539 if (substream == NULL)
2540 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
7eaa943c
TI		 2541 if (snd_BUG_ON(!substream))
2542 return -ENXIO;
1da177e4 2543 pcm = substream->pcm;
de1b8b93
TI		 2544 if (!pcm->card->shutdown)
2545 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2546 mutex_lock(&pcm->open_mutex);
1da177e4 2547 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2548 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2549 wake_up(&pcm->open_wait);
2550 module_put(pcm->card->module);
2551 snd_card_file_remove(pcm->card, file);
2552 return 0;
2553}
2554
2555static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2556{
6ac77bc1 2557 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2558 int __user *p = (int __user *)arg;
2559 int res;
2560
2561 pcm_oss_file = file->private_data;
2562 if (cmd == OSS_GETVERSION)
2563 return put_user(SNDRV_OSS_VERSION, p);
2564 if (cmd == OSS_ALSAEMULVER)
2565 return put_user(1, p);
658355b5 2566#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
1da177e4 2567 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2568 struct snd_pcm_substream *substream;
1da177e4
LT		 2569 int idx;
2570 for (idx = 0; idx < 2; ++idx) {
2571 substream = pcm_oss_file->streams[idx];
2572 if (substream != NULL)
2573 break;
2574 }
7eaa943c
TI		 2575 if (snd_BUG_ON(idx >= 2))
2576 return -ENXIO;
1da177e4
LT		 2577 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2578 }
2579#endif
2580 if (((cmd >> 8) & 0xff) != 'P')
2581 return -EINVAL;
2582#ifdef OSS_DEBUG
61efcee8 2583 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 2584#endif
2585 switch (cmd) {
2586 case SNDCTL_DSP_RESET:
2587 return snd_pcm_oss_reset(pcm_oss_file);
2588 case SNDCTL_DSP_SYNC:
2589 return snd_pcm_oss_sync(pcm_oss_file);
2590 case SNDCTL_DSP_SPEED:
2591 if (get_user(res, p))
2592 return -EFAULT;
2593 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2594 return res;
2595 return put_user(res, p);
2596 case SOUND_PCM_READ_RATE:
2597 res = snd_pcm_oss_get_rate(pcm_oss_file);
2598 if (res < 0)
2599 return res;
2600 return put_user(res, p);
2601 case SNDCTL_DSP_STEREO:
2602 if (get_user(res, p))
2603 return -EFAULT;
2604 res = res > 0 ? 2 : 1;
2605 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2606 return res;
2607 return put_user(--res, p);
2608 case SNDCTL_DSP_GETBLKSIZE:
2609 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2610 if (res < 0)
2611 return res;
2612 return put_user(res, p);
2613 case SNDCTL_DSP_SETFMT:
2614 if (get_user(res, p))
2615 return -EFAULT;
2616 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2617 if (res < 0)
2618 return res;
2619 return put_user(res, p);
2620 case SOUND_PCM_READ_BITS:
2621 res = snd_pcm_oss_get_format(pcm_oss_file);
2622 if (res < 0)
2623 return res;
2624 return put_user(res, p);
2625 case SNDCTL_DSP_CHANNELS:
2626 if (get_user(res, p))
2627 return -EFAULT;
2628 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2629 if (res < 0)
2630 return res;
2631 return put_user(res, p);
2632 case SOUND_PCM_READ_CHANNELS:
2633 res = snd_pcm_oss_get_channels(pcm_oss_file);
2634 if (res < 0)
2635 return res;
2636 return put_user(res, p);
2637 case SOUND_PCM_WRITE_FILTER:
2638 case SOUND_PCM_READ_FILTER:
2639 return -EIO;
2640 case SNDCTL_DSP_POST:
2641 return snd_pcm_oss_post(pcm_oss_file);
2642 case SNDCTL_DSP_SUBDIVIDE:
2643 if (get_user(res, p))
2644 return -EFAULT;
2645 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2646 if (res < 0)
2647 return res;
2648 return put_user(res, p);
2649 case SNDCTL_DSP_SETFRAGMENT:
2650 if (get_user(res, p))
2651 return -EFAULT;
2652 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2653 case SNDCTL_DSP_GETFMTS:
2654 res = snd_pcm_oss_get_formats(pcm_oss_file);
2655 if (res < 0)
2656 return res;
2657 return put_user(res, p);
2658 case SNDCTL_DSP_GETOSPACE:
2659 case SNDCTL_DSP_GETISPACE:
2660 return snd_pcm_oss_get_space(pcm_oss_file,
2661 cmd == SNDCTL_DSP_GETISPACE ?
2662 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2663 (struct audio_buf_info __user *) arg);
2664 case SNDCTL_DSP_NONBLOCK:
2665 return snd_pcm_oss_nonblock(file);
2666 case SNDCTL_DSP_GETCAPS:
2667 res = snd_pcm_oss_get_caps(pcm_oss_file);
2668 if (res < 0)
2669 return res;
2670 return put_user(res, p);
2671 case SNDCTL_DSP_GETTRIGGER:
2672 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2673 if (res < 0)
2674 return res;
2675 return put_user(res, p);
2676 case SNDCTL_DSP_SETTRIGGER:
2677 if (get_user(res, p))
2678 return -EFAULT;
2679 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2680 case SNDCTL_DSP_GETIPTR:
2681 case SNDCTL_DSP_GETOPTR:
2682 return snd_pcm_oss_get_ptr(pcm_oss_file,
2683 cmd == SNDCTL_DSP_GETIPTR ?
2684 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2685 (struct count_info __user *) arg);
2686 case SNDCTL_DSP_MAPINBUF:
2687 case SNDCTL_DSP_MAPOUTBUF:
2688 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2689 cmd == SNDCTL_DSP_MAPINBUF ?
2690 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2691 (struct buffmem_desc __user *) arg);
2692 case SNDCTL_DSP_SETSYNCRO:
2693 /* stop DMA now.. */
2694 return 0;
2695 case SNDCTL_DSP_SETDUPLEX:
2696 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2697 return 0;
2698 return -EIO;
2699 case SNDCTL_DSP_GETODELAY:
2700 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2701 if (res < 0) {
2702 /* it's for sure, some broken apps don't check for error codes */
2703 put_user(0, p);
2704 return res;
2705 }
2706 return put_user(res, p);
2707 case SNDCTL_DSP_PROFILE:
2708 return 0; /* silently ignore */
2709 default:
61efcee8 2710 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
1da177e4
LT		 2711 }
2712 return -EINVAL;
2713}
2714
2715#ifdef CONFIG_COMPAT
2716/* all compatible */
83266b6b
TI		 2717static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2718 unsigned long arg)
2719{
2720 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2721}
1da177e4
LT		 2722#else
2723#define snd_pcm_oss_ioctl_compat NULL
2724#endif
2725
2726static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2727{
6ac77bc1
TI		 2728 struct snd_pcm_oss_file *pcm_oss_file;
2729 struct snd_pcm_substream *substream;
1da177e4
LT		 2730
2731 pcm_oss_file = file->private_data;
2732 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2733 if (substream == NULL)
2734 return -ENXIO;
0df63e44 2735 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 2736#ifndef OSS_DEBUG
2737 return snd_pcm_oss_read1(substream, buf, count);
2738#else
2739 {
2740 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
61efcee8
TI		 2741 pcm_dbg(substream->pcm,
2742 "pcm_oss: read %li bytes (returned %li bytes)\n",
2743 (long)count, (long)res);
1da177e4
LT		 2744 return res;
2745 }
2746#endif
2747}
2748
2749static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2750{
6ac77bc1
TI		 2751 struct snd_pcm_oss_file *pcm_oss_file;
2752 struct snd_pcm_substream *substream;
1da177e4
LT		 2753 long result;
2754
2755 pcm_oss_file = file->private_data;
2756 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2757 if (substream == NULL)
2758 return -ENXIO;
0df63e44 2759 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2760 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2761#ifdef OSS_DEBUG
61efcee8 2762 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
006de267 2763 (long)count, (long)result);
1da177e4
LT		 2764#endif
2765 return result;
2766}
2767
6ac77bc1 2768static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2769{
6ac77bc1 2770 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2771 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2772 return runtime->oss.prev_hw_ptr_period !=
2773 get_hw_ptr_period(runtime);
1da177e4 2774 else
f240406b
JK		 2775 return snd_pcm_playback_avail(runtime) >=
2776 runtime->oss.period_frames;
1da177e4
LT		 2777}
2778
6ac77bc1 2779static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2780{
6ac77bc1 2781 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2782 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2783 return runtime->oss.prev_hw_ptr_period !=
2784 get_hw_ptr_period(runtime);
1da177e4 2785 else
f240406b
JK		 2786 return snd_pcm_capture_avail(runtime) >=
2787 runtime->oss.period_frames;
1da177e4
LT		 2788}
2789
680ef72a 2790static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
1da177e4 2791{
6ac77bc1 2792 struct snd_pcm_oss_file *pcm_oss_file;
680ef72a 2793 __poll_t mask;
6ac77bc1 2794 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2795
2796 pcm_oss_file = file->private_data;
2797
2798 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2799 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2800
2801 mask = 0;
2802 if (psubstream != NULL) {
6ac77bc1 2803 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2804 poll_wait(file, &runtime->sleep, wait);
2805 snd_pcm_stream_lock_irq(psubstream);
2806 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2807 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2808 snd_pcm_oss_playback_ready(psubstream)))
a9a08845 2809 mask |= EPOLLOUT | EPOLLWRNORM;
1da177e4
LT		 2810 snd_pcm_stream_unlock_irq(psubstream);
2811 }
2812 if (csubstream != NULL) {
6ac77bc1
TI		 2813 struct snd_pcm_runtime *runtime = csubstream->runtime;
2814 snd_pcm_state_t ostate;
1da177e4
LT		 2815 poll_wait(file, &runtime->sleep, wait);
2816 snd_pcm_stream_lock_irq(csubstream);
2817 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2818 snd_pcm_oss_capture_ready(csubstream))
a9a08845 2819 mask |= EPOLLIN | EPOLLRDNORM;
1da177e4
LT		 2820 snd_pcm_stream_unlock_irq(csubstream);
2821 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2822 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2823 memset(&ofile, 0, sizeof(ofile));
2824 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2825 runtime->oss.trigger = 0;
2826 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2827 }
2828 }
2829
2830 return mask;
2831}
2832
2833static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2834{
6ac77bc1
TI		 2835 struct snd_pcm_oss_file *pcm_oss_file;
2836 struct snd_pcm_substream *substream = NULL;
2837 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2838 int err;
2839
2840#ifdef OSS_DEBUG
61efcee8 2841 pr_debug("pcm_oss: mmap begin\n");
1da177e4
LT		 2842#endif
2843 pcm_oss_file = file->private_data;
2844 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2845 case VM_READ | VM_WRITE:
2846 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2847 if (substream)
2848 break;
2849 /* Fall through */
2850 case VM_READ:
2851 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2852 break;
2853 case VM_WRITE:
2854 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2855 break;
2856 default:
2857 return -EINVAL;
2858 }
2859 /* set VM_READ access as well to fix memset() routines that do
2860 reads before writes (to improve performance) */
2861 area->vm_flags |= VM_READ;
2862 if (substream == NULL)
2863 return -ENXIO;
2864 runtime = substream->runtime;
2865 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2866 return -EIO;
2867 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2868 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2869 else
2870 return -EIO;
2871
2872 if (runtime->oss.params) {
b2483716
TI		 2873 /* use mutex_trylock() for params_lock for avoiding a deadlock
2874 * between mmap_sem and params_lock taken by
2875 * copy_from/to_user() in snd_pcm_oss_write/read()
2876 */
2877 err = snd_pcm_oss_change_params(substream, true);
2878 if (err < 0)
1da177e4
LT		 2879 return err;
2880 }
21a3479a 2881#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2882 if (runtime->oss.plugin_first != NULL)
2883 return -EIO;
21a3479a 2884#endif
1da177e4
LT		 2885
2886 if (area->vm_pgoff != 0)
2887 return -EINVAL;
2888
2889 err = snd_pcm_mmap_data(substream, file, area);
2890 if (err < 0)
2891 return err;
2892 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2893 runtime->silence_threshold = 0;
2894 runtime->silence_size = 0;
2895#ifdef OSS_DEBUG
61efcee8 2896 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
006de267 2897 runtime->oss.mmap_bytes);
1da177e4
LT		 2898#endif
2899 /* In mmap mode we never stop */
2900 runtime->stop_threshold = runtime->boundary;
2901
2902 return 0;
2903}
2904
b7d90a35 2905#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2906/*
2907 * /proc interface
2908 */
2909
6ac77bc1
TI		 2910static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2911 struct snd_info_buffer *buffer)
1da177e4 2912{
6ac77bc1
TI		 2913 struct snd_pcm_str *pstr = entry->private_data;
2914 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2915 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2916 while (setup) {
2917 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2918 setup->task_name,
2919 setup->periods,
2920 setup->period_size,
2921 setup->disable ? " disable" : "",
2922 setup->direct ? " direct" : "",
2923 setup->block ? " block" : "",
2924 setup->nonblock ? " non-block" : "",
2925 setup->partialfrag ? " partial-frag" : "",
2926 setup->nosilence ? " no-silence" : "");
2927 setup = setup->next;
2928 }
1a60d4c5 2929 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2930}
2931
6ac77bc1 2932static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2933{
6ac77bc1 2934 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2935
1da177e4
LT		 2936 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2937 setup; setup = setupn) {
2938 setupn = setup->next;
2939 kfree(setup->task_name);
2940 kfree(setup);
2941 }
2942 pstr->oss.setup_list = NULL;
2943}
2944
6ac77bc1
TI		 2945static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2946 struct snd_info_buffer *buffer)
1da177e4 2947{
6ac77bc1 2948 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2949 char line[128], str[32], task_name[32];
2950 const char *ptr;
1da177e4 2951 int idx1;
6ac77bc1 2952 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2953
2954 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2955 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2956 memset(&template, 0, sizeof(template));
2957 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2958 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2959 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2960 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2961 continue;
2962 }
2963 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2964 if (!strcmp(setup->task_name, task_name)) {
2965 template = *setup;
2966 break;
2967 }
2968 }
2969 ptr = snd_info_get_str(str, ptr, sizeof(str));
2970 template.periods = simple_strtoul(str, NULL, 10);
2971 ptr = snd_info_get_str(str, ptr, sizeof(str));
2972 template.period_size = simple_strtoul(str, NULL, 10);
2973 for (idx1 = 31; idx1 >= 0; idx1--)
2974 if (template.period_size & (1 << idx1))
2975 break;
2976 for (idx1--; idx1 >= 0; idx1--)
2977 template.period_size &= ~(1 << idx1);
2978 do {
2979 ptr = snd_info_get_str(str, ptr, sizeof(str));
2980 if (!strcmp(str, "disable")) {
2981 template.disable = 1;
2982 } else if (!strcmp(str, "direct")) {
2983 template.direct = 1;
2984 } else if (!strcmp(str, "block")) {
2985 template.block = 1;
2986 } else if (!strcmp(str, "non-block")) {
2987 template.nonblock = 1;
2988 } else if (!strcmp(str, "partial-frag")) {
2989 template.partialfrag = 1;
2990 } else if (!strcmp(str, "no-silence")) {
2991 template.nosilence = 1;
10f69f9e
TI		 2992 } else if (!strcmp(str, "buggy-ptr")) {
2993 template.buggyptr = 1;
1da177e4
LT		 2994 }
2995 } while (*str);
2996 if (setup == NULL) {
060d77b9
TI		 2997 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2998 if (! setup) {
2999 buffer->error = -ENOMEM;
91054598 3000 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9
TI		 3001 return;
3002 }
3003 if (pstr->oss.setup_list == NULL)
3004 pstr->oss.setup_list = setup;
3005 else {
3006 for (setup1 = pstr->oss.setup_list;
3007 setup1->next; setup1 = setup1->next);
3008 setup1->next = setup;
3009 }
3010 template.task_name = kstrdup(task_name, GFP_KERNEL);
3011 if (! template.task_name) {
3012 kfree(setup);
1da177e4 3013 buffer->error = -ENOMEM;
91054598 3014 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9 3015 return;
1da177e4
LT		 3016 }
3017 }
060d77b9 3018 *setup = template;
1a60d4c5 3019 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 3020 }
3021}
3022
6ac77bc1 3023static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 3024{
3025 int stream;
3026 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 3027 struct snd_info_entry *entry;
3028 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 3029 if (pstr->substream_count == 0)
3030 continue;
3031 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3032 entry->content = SNDRV_INFO_CONTENT_TEXT;
6a73cf46 3033 entry->mode = S_IFREG | 0644;
1da177e4 3034 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 3035 entry->c.text.write = snd_pcm_oss_proc_write;
3036 entry->private_data = pstr;
3037 if (snd_info_register(entry) < 0) {
3038 snd_info_free_entry(entry);
3039 entry = NULL;
3040 }
3041 }
3042 pstr->oss.proc_entry = entry;
3043 }
3044}
3045
6ac77bc1 3046static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 3047{
3048 int stream;
3049 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 3050 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 3051 snd_info_free_entry(pstr->oss.proc_entry);
3052 pstr->oss.proc_entry = NULL;
3053 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 3054 }
3055}
b7d90a35 3056#else /* !CONFIG_SND_VERBOSE_PROCFS */
04f141a8
TI		 3057#define snd_pcm_oss_proc_init(pcm)
3058#define snd_pcm_oss_proc_done(pcm)
b7d90a35 3059#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 3060
3061/*
3062 * ENTRY functions
3063 */
3064
9c2e08c5 3065static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 3066{
3067 .owner = THIS_MODULE,
3068 .read = snd_pcm_oss_read,
3069 .write = snd_pcm_oss_write,
3070 .open = snd_pcm_oss_open,
3071 .release = snd_pcm_oss_release,
02f4865f 3072 .llseek = no_llseek,
1da177e4
LT		 3073 .poll = snd_pcm_oss_poll,
3074 .unlocked_ioctl = snd_pcm_oss_ioctl,
3075 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3076 .mmap = snd_pcm_oss_mmap,
3077};
3078
6ac77bc1 3079static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4 3080{
1da177e4 3081 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 3082 pcm->card, index, &snd_pcm_oss_f_reg,
80d7d771 3083 pcm) < 0) {
61efcee8 3084 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
d3d579f8 3085 pcm->card->number, pcm->device);
1da177e4
LT		 3086 }
3087}
3088
6ac77bc1 3089static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 3090{
3091 pcm->oss.reg = 0;
896e6cc2 3092 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3093 char name[128];
3094 int duplex;
3095 register_oss_dsp(pcm, 0);
3096 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3097 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3098 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3099 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3100#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3101 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3102 pcm->card->number,
3103 name);
3104#endif
3105 pcm->oss.reg++;
3106 pcm->oss.reg_mask |= 1;
3107 }
896e6cc2 3108 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3109 register_oss_dsp(pcm, 1);
3110 pcm->oss.reg++;
3111 pcm->oss.reg_mask |= 2;
3112 }
3113
3114 if (pcm->oss.reg)
3115 snd_pcm_oss_proc_init(pcm);
3116
3117 return 0;
3118}
3119
6ac77bc1 3120static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3121{
3122 if (pcm->oss.reg) {
3123 if (pcm->oss.reg_mask & 1) {
3124 pcm->oss.reg_mask &= ~1;
3125 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3126 pcm->card, 0);
3127 }
3128 if (pcm->oss.reg_mask & 2) {
3129 pcm->oss.reg_mask &= ~2;
3130 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3131 pcm->card, 1);
3132 }
896e6cc2 3133 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3134#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3135 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3136#endif
3137 }
3138 pcm->oss.reg = 0;
1da177e4
LT		 3139 }
3140 return 0;
3141}
3142
c461482c
TI		 3143static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3144{
3145 snd_pcm_oss_disconnect_minor(pcm);
3146 snd_pcm_oss_proc_done(pcm);
3147 return 0;
3148}
3149
6ac77bc1 3150static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3151{
3152 .n_register = snd_pcm_oss_register_minor,
3153 .n_disconnect = snd_pcm_oss_disconnect_minor,
3154 .n_unregister = snd_pcm_oss_unregister_minor,
3155};
3156
3157static int __init alsa_pcm_oss_init(void)
3158{
3159 int i;
3160 int err;
3161
3162 /* check device map table */
3163 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3164 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3165 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
d3d579f8 3166 i, dsp_map[i]);
1da177e4
LT		 3167 dsp_map[i] = 0;
3168 }
896e6cc2 3169 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3170 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
d3d579f8 3171 i, adsp_map[i]);
1da177e4
LT		 3172 adsp_map[i] = 1;
3173 }
3174 }
3175 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3176 return err;
3177 return 0;
3178}
3179
3180static void __exit alsa_pcm_oss_exit(void)
3181{
3182 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3183}
3184
3185module_init(alsa_pcm_oss_init)
3186module_exit(alsa_pcm_oss_exit)
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