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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 ||
ba71d227
TI		 887 !snd_mask_test_format(sformat_mask, sformat)) {
888 pcm_for_each_format(sformat) {
889 if (snd_mask_test_format(sformat_mask, sformat) &&
1da177e4 890 snd_pcm_oss_format_to(sformat) >= 0)
ba71d227 891 goto format_found;
1da177e4 892 }
ba71d227
TI		 893 pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
894 err = -EINVAL;
895 goto failure;
1da177e4 896 }
ba71d227 897 format_found:
fea952e5 898 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
7eaa943c
TI		 899 if (err < 0)
900 goto failure;
1da177e4
LT		 901
902 if (direct) {
903 memcpy(params, sparams, sizeof(*params));
904 } else {
905 _snd_pcm_hw_params_any(params);
906 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
fea952e5 907 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
1da177e4 908 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
fea952e5 909 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
1da177e4
LT		 910 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
911 runtime->oss.channels, 0);
912 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
913 runtime->oss.rate, 0);
914 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
915 params_access(params), params_format(params),
916 params_channels(params), params_rate(params));
917 }
918 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
919 params_access(sparams), params_format(sparams),
920 params_channels(sparams), params_rate(sparams));
921
922 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
923 params_channels(params) / 8;
924
ca0214ee
TI		 925 err = snd_pcm_oss_period_size(substream, params, sparams);
926 if (err < 0)
927 goto failure;
928
929 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
930 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
931 if (err < 0)
932 goto failure;
933
934 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
935 runtime->oss.periods, NULL);
936 if (err < 0)
937 goto failure;
938
939 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
940
941 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
942 if (err < 0) {
943 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
944 goto failure;
945 }
946
21a3479a 947#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 948 snd_pcm_oss_plugin_clear(substream);
949 if (!direct) {
950 /* add necessary plugins */
951 snd_pcm_oss_plugin_clear(substream);
952 if ((err = snd_pcm_plug_format_plugins(substream,
953 params,
954 sparams)) < 0) {
61efcee8
TI		 955 pcm_dbg(substream->pcm,
956 "snd_pcm_plug_format_plugins failed: %i\n", err);
1da177e4
LT		 957 snd_pcm_oss_plugin_clear(substream);
958 goto failure;
959 }
960 if (runtime->oss.plugin_first) {
6ac77bc1 961 struct snd_pcm_plugin *plugin;
1da177e4 962 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
61efcee8
TI		 963 pcm_dbg(substream->pcm,
964 "snd_pcm_plugin_build_io failed: %i\n", err);
1da177e4
LT		 965 snd_pcm_oss_plugin_clear(substream);
966 goto failure;
967 }
968 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
969 err = snd_pcm_plugin_append(plugin);
970 } else {
971 err = snd_pcm_plugin_insert(plugin);
972 }
973 if (err < 0) {
974 snd_pcm_oss_plugin_clear(substream);
975 goto failure;
976 }
977 }
978 }
21a3479a 979#endif
1da177e4 980
1da177e4
LT		 981 if (runtime->oss.trigger) {
982 sw_params->start_threshold = 1;
983 } else {
984 sw_params->start_threshold = runtime->boundary;
985 }
9c323fcb
TI		 986 if (atomic_read(&substream->mmap_count) ||
987 substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1da177e4
LT		 988 sw_params->stop_threshold = runtime->boundary;
989 else
990 sw_params->stop_threshold = runtime->buffer_size;
991 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
992 sw_params->period_step = 1;
004e6538
TI		 993 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
994 1 : runtime->period_size;
9c323fcb 995 if (atomic_read(&substream->mmap_count) ||
060d77b9 996 substream->oss.setup.nosilence) {
1da177e4
LT		 997 sw_params->silence_threshold = 0;
998 sw_params->silence_size = 0;
999 } else {
1000 snd_pcm_uframes_t frames;
1001 frames = runtime->period_size + 16;
1002 if (frames > runtime->buffer_size)
1003 frames = runtime->buffer_size;
1004 sw_params->silence_threshold = frames;
1005 sw_params->silence_size = frames;
1006 }
1007
1008 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
61efcee8 1009 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
1da177e4
LT		 1010 goto failure;
1011 }
1012
1013 runtime->oss.periods = params_periods(sparams);
1014 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
7eaa943c
TI		 1015 if (oss_period_size < 0) {
1016 err = -EINVAL;
1017 goto failure;
1018 }
21a3479a 1019#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 1020 if (runtime->oss.plugin_first) {
1021 err = snd_pcm_plug_alloc(substream, oss_period_size);
1022 if (err < 0)
1023 goto failure;
1024 }
21a3479a 1025#endif
1da177e4
LT		 1026 oss_period_size *= oss_frame_size;
1027
1028 oss_buffer_size = oss_period_size * runtime->oss.periods;
7eaa943c
TI		 1029 if (oss_buffer_size < 0) {
1030 err = -EINVAL;
1031 goto failure;
1032 }
1da177e4
LT		 1033
1034 runtime->oss.period_bytes = oss_period_size;
1035 runtime->oss.buffer_bytes = oss_buffer_size;
1036
1037 pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
1038 runtime->oss.period_bytes,
1039 runtime->oss.buffer_bytes);
1040 pdprintf("slave: period_size = %i, buffer_size = %i\n",
1041 params_period_size(sparams),
1042 params_buffer_size(sparams));
1043
1044 runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
1045 runtime->oss.channels = params_channels(params);
1046 runtime->oss.rate = params_rate(params);
1047
65766ee0
TI		 1048 kvfree(runtime->oss.buffer);
1049 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
cbbb0570
RK		 1050 if (!runtime->oss.buffer) {
1051 err = -ENOMEM;
1052 goto failure;
1053 }
1054
1055 runtime->oss.params = 0;
1056 runtime->oss.prepare = 1;
1da177e4
LT		 1057 runtime->oss.buffer_used = 0;
1058 if (runtime->dma_area)
1059 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
1060
1061 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
1062
1063 err = 0;
1064failure:
1065 kfree(sw_params);
1066 kfree(params);
1067 kfree(sparams);
02a5d692
TI		 1068 return err;
1069}
1070
1071/* this one takes the lock by itself */
1072static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
1073 bool trylock)
1074{
1075 struct snd_pcm_runtime *runtime = substream->runtime;
1076 int err;
1077
1078 if (trylock) {
1079 if (!(mutex_trylock(&runtime->oss.params_lock)))
1080 return -EAGAIN;
1081 } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
1082 return -ERESTARTSYS;
1083
1084 err = snd_pcm_oss_change_params_locked(substream);
e3a5d59a 1085 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1086 return err;
1087}
1088
6ac77bc1 1089static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
1da177e4
LT		 1090{
1091 int idx, err;
6ac77bc1 1092 struct snd_pcm_substream *asubstream = NULL, *substream;
1da177e4
LT		 1093
1094 for (idx = 0; idx < 2; idx++) {
1095 substream = pcm_oss_file->streams[idx];
1096 if (substream == NULL)
1097 continue;
1098 if (asubstream == NULL)
1099 asubstream = substream;
1100 if (substream->runtime->oss.params) {
b2483716 1101 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1102 if (err < 0)
1103 return err;
1104 }
1105 }
7eaa943c
TI		 1106 if (!asubstream)
1107 return -EIO;
1da177e4
LT		 1108 if (r_substream)
1109 *r_substream = asubstream;
1110 return 0;
1111}
1112
02a5d692 1113/* call with params_lock held */
e15dc99d
TI		 1114/* NOTE: this always call PREPARE unconditionally no matter whether
1115 * runtime->oss.prepare is set or not
1116 */
6ac77bc1 1117static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1118{
1119 int err;
6ac77bc1 1120 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1121
1122 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
1123 if (err < 0) {
61efcee8
TI		 1124 pcm_dbg(substream->pcm,
1125 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
1da177e4
LT		 1126 return err;
1127 }
1128 runtime->oss.prepare = 0;
f240406b 1129 runtime->oss.prev_hw_ptr_period = 0;
1da177e4
LT		 1130 runtime->oss.period_ptr = 0;
1131 runtime->oss.buffer_used = 0;
1132
1133 return 0;
1134}
1135
6ac77bc1 1136static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
1da177e4 1137{
6ac77bc1 1138 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1139 int err;
1140
1da177e4
LT		 1141 runtime = substream->runtime;
1142 if (runtime->oss.params) {
b2483716 1143 err = snd_pcm_oss_change_params(substream, false);
1da177e4
LT		 1144 if (err < 0)
1145 return err;
1146 }
02a5d692
TI		 1147 if (runtime->oss.prepare) {
1148 if (mutex_lock_interruptible(&runtime->oss.params_lock))
1149 return -ERESTARTSYS;
1150 err = snd_pcm_oss_prepare(substream);
1151 mutex_unlock(&runtime->oss.params_lock);
1152 if (err < 0)
1153 return err;
1154 }
1155 return 0;
1156}
1157
1158/* call with params_lock held */
1159static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
1160{
1161 struct snd_pcm_runtime *runtime;
1162 int err;
1163
1164 runtime = substream->runtime;
1165 if (runtime->oss.params) {
1166 err = snd_pcm_oss_change_params_locked(substream);
1167 if (err < 0)
1168 return err;
1169 }
1da177e4
LT		 1170 if (runtime->oss.prepare) {
1171 err = snd_pcm_oss_prepare(substream);
1172 if (err < 0)
1173 return err;
1174 }
1175 return 0;
1176}
1177
6ac77bc1 1178static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
1da177e4 1179{
6ac77bc1 1180 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1181 snd_pcm_uframes_t frames;
1182 int err = 0;
1183
1184 while (1) {
1185 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
1186 if (err < 0)
1187 break;
1188 runtime = substream->runtime;
1189 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
1190 break;
1191 /* in case of overrun, skip whole periods like OSS/Linux driver does */
1192 /* until avail(delay) <= buffer_size */
1193 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
1194 frames /= runtime->period_size;
1195 frames *= runtime->period_size;
1196 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
1197 if (err < 0)
1198 break;
1199 }
1200 return err;
1201}
1202
6ac77bc1 1203snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1204{
6ac77bc1 1205 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1206 int ret;
1207 while (1) {
1208 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1209 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1210#ifdef OSS_DEBUG
61efcee8
TI		 1211 pcm_dbg(substream->pcm,
1212 "pcm_oss: write: recovering from %s\n",
1213 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1214 "XRUN" : "SUSPEND");
1da177e4
LT		 1215#endif
1216 ret = snd_pcm_oss_prepare(substream);
1217 if (ret < 0)
1218 break;
1219 }
146f6697 1220 mutex_unlock(&runtime->oss.params_lock);
13f72c8c
TI		 1221 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1222 frames, in_kernel);
146f6697 1223 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1224 if (ret != -EPIPE && ret != -ESTRPIPE)
1225 break;
1226 /* test, if we can't store new data, because the stream */
1227 /* has not been started */
1228 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1229 return -EAGAIN;
1230 }
1231 return ret;
1232}
1233
6ac77bc1 1234snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
1da177e4 1235{
6ac77bc1 1236 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1237 snd_pcm_sframes_t delay;
1238 int ret;
1239 while (1) {
1240 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1241 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1242#ifdef OSS_DEBUG
61efcee8
TI		 1243 pcm_dbg(substream->pcm,
1244 "pcm_oss: read: recovering from %s\n",
1245 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1246 "XRUN" : "SUSPEND");
1da177e4
LT		 1247#endif
1248 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1249 if (ret < 0)
1250 break;
1251 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1252 ret = snd_pcm_oss_prepare(substream);
1253 if (ret < 0)
1254 break;
1255 }
1256 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
1257 if (ret < 0)
1258 break;
146f6697 1259 mutex_unlock(&runtime->oss.params_lock);
13f72c8c
TI		 1260 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
1261 frames, in_kernel);
146f6697 1262 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1263 if (ret == -EPIPE) {
1264 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1265 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1266 if (ret < 0)
1267 break;
1268 }
1269 continue;
1270 }
1271 if (ret != -ESTRPIPE)
1272 break;
1273 }
1274 return ret;
1275}
1276
fed5794f
TI		 1277#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1278snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1da177e4 1279{
6ac77bc1 1280 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1281 int ret;
1282 while (1) {
1283 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1284 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1285#ifdef OSS_DEBUG
61efcee8
TI		 1286 pcm_dbg(substream->pcm,
1287 "pcm_oss: writev: recovering from %s\n",
1288 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1289 "XRUN" : "SUSPEND");
1da177e4
LT		 1290#endif
1291 ret = snd_pcm_oss_prepare(substream);
1292 if (ret < 0)
1293 break;
1294 }
fed5794f 1295 ret = snd_pcm_kernel_writev(substream, bufs, frames);
1da177e4
LT		 1296 if (ret != -EPIPE && ret != -ESTRPIPE)
1297 break;
1298
1299 /* test, if we can't store new data, because the stream */
1300 /* has not been started */
1301 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
1302 return -EAGAIN;
1303 }
1304 return ret;
1305}
1306
fed5794f 1307snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
1da177e4 1308{
6ac77bc1 1309 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1310 int ret;
1311 while (1) {
1312 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
1313 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1314#ifdef OSS_DEBUG
61efcee8
TI		 1315 pcm_dbg(substream->pcm,
1316 "pcm_oss: readv: recovering from %s\n",
1317 runtime->status->state == SNDRV_PCM_STATE_XRUN ?
1318 "XRUN" : "SUSPEND");
1da177e4
LT		 1319#endif
1320 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1321 if (ret < 0)
1322 break;
1323 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
1324 ret = snd_pcm_oss_prepare(substream);
1325 if (ret < 0)
1326 break;
1327 }
fed5794f 1328 ret = snd_pcm_kernel_readv(substream, bufs, frames);
1da177e4
LT		 1329 if (ret != -EPIPE && ret != -ESTRPIPE)
1330 break;
1331 }
1332 return ret;
1333}
fed5794f 1334#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
1da177e4 1335
6ac77bc1 1336static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
1da177e4 1337{
6ac77bc1 1338 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1339 snd_pcm_sframes_t frames, frames1;
21a3479a 1340#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4 1341 if (runtime->oss.plugin_first) {
6ac77bc1 1342 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1343 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
1344 if (!in_kernel) {
fea952e5 1345 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
1da177e4
LT		 1346 return -EFAULT;
1347 buf = runtime->oss.buffer;
1348 }
1349 frames = bytes / oss_frame_bytes;
1350 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
1351 if (frames1 < 0)
1352 return frames1;
1353 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
1354 if (frames1 <= 0)
1355 return frames1;
1356 bytes = frames1 * oss_frame_bytes;
21a3479a
JK		 1357 } else
1358#endif
1359 {
1da177e4
LT		 1360 frames = bytes_to_frames(runtime, bytes);
1361 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
1362 if (frames1 <= 0)
1363 return frames1;
1364 bytes = frames_to_bytes(runtime, frames1);
1365 }
1366 return bytes;
1367}
1368
6ac77bc1 1369static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
1da177e4
LT		 1370{
1371 size_t xfer = 0;
5607dddb 1372 ssize_t tmp = 0;
6ac77bc1 1373 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1374
9c323fcb 1375 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1376 return -ENXIO;
1377
40cab6e8 1378 atomic_inc(&runtime->oss.rw_ref);
1da177e4 1379 while (bytes > 0) {
900498a3
TI		 1380 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1381 tmp = -ERESTARTSYS;
1382 break;
1383 }
02a5d692
TI		 1384 tmp = snd_pcm_oss_make_ready_locked(substream);
1385 if (tmp < 0)
1386 goto err;
1da177e4
LT		 1387 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1388 tmp = bytes;
1389 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
1390 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
1391 if (tmp > 0) {
e3a5d59a
TI		 1392 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
1393 tmp = -EFAULT;
1394 goto err;
1395 }
1da177e4
LT		 1396 }
1397 runtime->oss.buffer_used += tmp;
1398 buf += tmp;
1399 bytes -= tmp;
1400 xfer += tmp;
060d77b9 1401 if (substream->oss.setup.partialfrag ||
1da177e4
LT		 1402 runtime->oss.buffer_used == runtime->oss.period_bytes) {
1403 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
1404 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
1405 if (tmp <= 0)
e3a5d59a 1406 goto err;
1da177e4
LT		 1407 runtime->oss.bytes += tmp;
1408 runtime->oss.period_ptr += tmp;
1409 runtime->oss.period_ptr %= runtime->oss.period_bytes;
1410 if (runtime->oss.period_ptr == 0 ||
1411 runtime->oss.period_ptr == runtime->oss.buffer_used)
1412 runtime->oss.buffer_used = 0;
e3a5d59a
TI		 1413 else if ((substream->f_flags & O_NONBLOCK) != 0) {
1414 tmp = -EAGAIN;
1415 goto err;
1416 }
1da177e4
LT		 1417 }
1418 } else {
4d23359b
CL		 1419 tmp = snd_pcm_oss_write2(substream,
1420 (const char __force *)buf,
1421 runtime->oss.period_bytes, 0);
1da177e4 1422 if (tmp <= 0)
e3a5d59a 1423 goto err;
1da177e4
LT		 1424 runtime->oss.bytes += tmp;
1425 buf += tmp;
1426 bytes -= tmp;
1427 xfer += tmp;
0df63e44 1428 if ((substream->f_flags & O_NONBLOCK) != 0 &&
1da177e4 1429 tmp != runtime->oss.period_bytes)
900498a3 1430 tmp = -EAGAIN;
1da177e4 1431 }
e3a5d59a 1432 err:
900498a3
TI		 1433 mutex_unlock(&runtime->oss.params_lock);
1434 if (tmp < 0)
1435 break;
29159a4e
TI		 1436 if (signal_pending(current)) {
1437 tmp = -ERESTARTSYS;
900498a3 1438 break;
29159a4e 1439 }
900498a3 1440 tmp = 0;
1da177e4 1441 }
40cab6e8 1442 atomic_dec(&runtime->oss.rw_ref);
e3a5d59a 1443 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1444}
1445
6ac77bc1 1446static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
1da177e4 1447{
6ac77bc1 1448 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1449 snd_pcm_sframes_t frames, frames1;
21a3479a 1450#ifdef CONFIG_SND_PCM_OSS_PLUGINS
fea952e5 1451 char __user *final_dst = (char __force __user *)buf;
1da177e4 1452 if (runtime->oss.plugin_first) {
6ac77bc1 1453 struct snd_pcm_plugin_channel *channels;
1da177e4
LT		 1454 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
1455 if (!in_kernel)
1456 buf = runtime->oss.buffer;
1457 frames = bytes / oss_frame_bytes;
1458 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
1459 if (frames1 < 0)
1460 return frames1;
1461 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
1462 if (frames1 <= 0)
1463 return frames1;
1464 bytes = frames1 * oss_frame_bytes;
1465 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
1466 return -EFAULT;
21a3479a
JK		 1467 } else
1468#endif
1469 {
1da177e4
LT		 1470 frames = bytes_to_frames(runtime, bytes);
1471 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
1472 if (frames1 <= 0)
1473 return frames1;
1474 bytes = frames_to_bytes(runtime, frames1);
1475 }
1476 return bytes;
1477}
1478
6ac77bc1 1479static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
1da177e4
LT		 1480{
1481 size_t xfer = 0;
5607dddb 1482 ssize_t tmp = 0;
6ac77bc1 1483 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1484
9c323fcb 1485 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1486 return -ENXIO;
1487
40cab6e8 1488 atomic_inc(&runtime->oss.rw_ref);
1da177e4 1489 while (bytes > 0) {
900498a3
TI		 1490 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1491 tmp = -ERESTARTSYS;
1492 break;
1493 }
02a5d692
TI		 1494 tmp = snd_pcm_oss_make_ready_locked(substream);
1495 if (tmp < 0)
1496 goto err;
1da177e4
LT		 1497 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
1498 if (runtime->oss.buffer_used == 0) {
1499 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
1500 if (tmp <= 0)
e3a5d59a 1501 goto err;
1da177e4
LT		 1502 runtime->oss.bytes += tmp;
1503 runtime->oss.period_ptr = tmp;
1504 runtime->oss.buffer_used = tmp;
1505 }
1506 tmp = bytes;
1507 if ((size_t) tmp > runtime->oss.buffer_used)
1508 tmp = runtime->oss.buffer_used;
e3a5d59a
TI		 1509 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
1510 tmp = -EFAULT;
1511 goto err;
1512 }
1da177e4
LT		 1513 buf += tmp;
1514 bytes -= tmp;
1515 xfer += tmp;
1516 runtime->oss.buffer_used -= tmp;
1517 } else {
4d23359b
CL		 1518 tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
1519 runtime->oss.period_bytes, 0);
1da177e4 1520 if (tmp <= 0)
e3a5d59a 1521 goto err;
1da177e4
LT		 1522 runtime->oss.bytes += tmp;
1523 buf += tmp;
1524 bytes -= tmp;
1525 xfer += tmp;
1526 }
e3a5d59a 1527 err:
900498a3
TI		 1528 mutex_unlock(&runtime->oss.params_lock);
1529 if (tmp < 0)
1530 break;
29159a4e
TI		 1531 if (signal_pending(current)) {
1532 tmp = -ERESTARTSYS;
900498a3 1533 break;
29159a4e 1534 }
900498a3 1535 tmp = 0;
1da177e4 1536 }
40cab6e8 1537 atomic_dec(&runtime->oss.rw_ref);
e3a5d59a 1538 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
1da177e4
LT		 1539}
1540
6ac77bc1 1541static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1542{
6ac77bc1 1543 struct snd_pcm_substream *substream;
60686aa0
TI		 1544 struct snd_pcm_runtime *runtime;
1545 int i;
1da177e4 1546
60686aa0
TI		 1547 for (i = 0; i < 2; i++) {
1548 substream = pcm_oss_file->streams[i];
1549 if (!substream)
1550 continue;
1551 runtime = substream->runtime;
bf1bbb5a 1552 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
02a5d692 1553 mutex_lock(&runtime->oss.params_lock);
60686aa0
TI		 1554 runtime->oss.prepare = 1;
1555 runtime->oss.buffer_used = 0;
1556 runtime->oss.prev_hw_ptr_period = 0;
1557 runtime->oss.period_ptr = 0;
02a5d692 1558 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1559 }
1560 return 0;
1561}
1562
6ac77bc1 1563static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1564{
6ac77bc1 1565 struct snd_pcm_substream *substream;
1da177e4
LT		 1566 int err;
1567
1568 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1569 if (substream != NULL) {
1570 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1571 return err;
bf1bbb5a 1572 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
1da177e4
LT		 1573 }
1574 /* note: all errors from the start action are ignored */
1575 /* OSS apps do not know, how to handle them */
1576 return 0;
1577}
1578
6ac77bc1 1579static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
1da177e4 1580{
6ac77bc1 1581 struct snd_pcm_runtime *runtime;
1da177e4 1582 ssize_t result = 0;
fea952e5 1583 snd_pcm_state_t state;
1da177e4 1584 long res;
ac6424b9 1585 wait_queue_entry_t wait;
1da177e4
LT		 1586
1587 runtime = substream->runtime;
1588 init_waitqueue_entry(&wait, current);
1589 add_wait_queue(&runtime->sleep, &wait);
1590#ifdef OSS_DEBUG
61efcee8 1591 pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
1da177e4
LT		 1592#endif
1593 while (1) {
1594 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1595 if (result > 0) {
1596 runtime->oss.buffer_used = 0;
1597 result = 0;
1598 break;
1599 }
1600 if (result != 0 && result != -EAGAIN)
1601 break;
1602 result = 0;
1603 set_current_state(TASK_INTERRUPTIBLE);
1604 snd_pcm_stream_lock_irq(substream);
fea952e5 1605 state = runtime->status->state;
1da177e4 1606 snd_pcm_stream_unlock_irq(substream);
fea952e5 1607 if (state != SNDRV_PCM_STATE_RUNNING) {
1da177e4
LT		 1608 set_current_state(TASK_RUNNING);
1609 break;
1610 }
1611 res = schedule_timeout(10 * HZ);
1612 if (signal_pending(current)) {
1613 result = -ERESTARTSYS;
1614 break;
1615 }
1616 if (res == 0) {
61efcee8
TI		 1617 pcm_err(substream->pcm,
1618 "OSS sync error - DMA timeout\n");
1da177e4
LT		 1619 result = -EIO;
1620 break;
1621 }
1622 }
1623 remove_wait_queue(&runtime->sleep, &wait);
1624 return result;
1625}
1626
6ac77bc1 1627static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 1628{
1629 int err = 0;
1630 unsigned int saved_f_flags;
6ac77bc1
TI		 1631 struct snd_pcm_substream *substream;
1632 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1633 snd_pcm_format_t format;
1634 unsigned long width;
1635 size_t size;
1636
1637 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1638 if (substream != NULL) {
1639 runtime = substream->runtime;
9c323fcb 1640 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 1641 goto __direct;
1642 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1643 return err;
40cab6e8
TI		 1644 atomic_inc(&runtime->oss.rw_ref);
1645 if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
1646 atomic_dec(&runtime->oss.rw_ref);
02a5d692 1647 return -ERESTARTSYS;
40cab6e8 1648 }
1da177e4
LT		 1649 format = snd_pcm_oss_format_from(runtime->oss.format);
1650 width = snd_pcm_format_physical_width(format);
1651 if (runtime->oss.buffer_used > 0) {
1652#ifdef OSS_DEBUG
61efcee8 1653 pcm_dbg(substream->pcm, "sync: buffer_used\n");
1da177e4
LT		 1654#endif
1655 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1656 snd_pcm_format_set_silence(format,
1657 runtime->oss.buffer + runtime->oss.buffer_used,
1658 size);
1659 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
40cab6e8
TI		 1660 if (err < 0)
1661 goto unlock;
1da177e4
LT		 1662 } else if (runtime->oss.period_ptr > 0) {
1663#ifdef OSS_DEBUG
61efcee8 1664 pcm_dbg(substream->pcm, "sync: period_ptr\n");
1da177e4
LT		 1665#endif
1666 size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1667 snd_pcm_format_set_silence(format,
1668 runtime->oss.buffer,
1669 size * 8 / width);
1670 err = snd_pcm_oss_sync1(substream, size);
40cab6e8
TI		 1671 if (err < 0)
1672 goto unlock;
1da177e4
LT		 1673 }
1674 /*
1675 * The ALSA's period might be a bit large than OSS one.
1676 * Fill the remain portion of ALSA period with zeros.
1677 */
1678 size = runtime->control->appl_ptr % runtime->period_size;
1679 if (size > 0) {
1680 size = runtime->period_size - size;
13f72c8c
TI		 1681 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
1682 snd_pcm_lib_write(substream, NULL, size);
1683 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
1684 snd_pcm_lib_writev(substream, NULL, size);
1da177e4 1685 }
40cab6e8 1686unlock:
e3a5d59a 1687 mutex_unlock(&runtime->oss.params_lock);
40cab6e8
TI		 1688 atomic_dec(&runtime->oss.rw_ref);
1689 if (err < 0)
1690 return err;
1da177e4
LT		 1691 /*
1692 * finish sync: drain the buffer
1693 */
1694 __direct:
0df63e44
TI		 1695 saved_f_flags = substream->f_flags;
1696 substream->f_flags &= ~O_NONBLOCK;
bf1bbb5a 1697 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
0df63e44 1698 substream->f_flags = saved_f_flags;
1da177e4
LT		 1699 if (err < 0)
1700 return err;
02a5d692 1701 mutex_lock(&runtime->oss.params_lock);
1da177e4 1702 runtime->oss.prepare = 1;
02a5d692 1703 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1704 }
1705
1706 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1707 if (substream != NULL) {
1708 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1709 return err;
1710 runtime = substream->runtime;
bf1bbb5a 1711 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1da177e4
LT		 1712 if (err < 0)
1713 return err;
02a5d692 1714 mutex_lock(&runtime->oss.params_lock);
1da177e4
LT		 1715 runtime->oss.buffer_used = 0;
1716 runtime->oss.prepare = 1;
02a5d692 1717 mutex_unlock(&runtime->oss.params_lock);
1da177e4
LT		 1718 }
1719 return 0;
1720}
1721
6ac77bc1 1722static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1da177e4
LT		 1723{
1724 int idx;
1725
1726 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1727 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1728 struct snd_pcm_runtime *runtime;
f6d297df
TI		 1729 int err;
1730
1da177e4
LT		 1731 if (substream == NULL)
1732 continue;
1733 runtime = substream->runtime;
1734 if (rate < 1000)
1735 rate = 1000;
1736 else if (rate > 192000)
1737 rate = 192000;
f6d297df
TI		 1738 err = lock_params(runtime);
1739 if (err < 0)
1740 return err;
1da177e4
LT		 1741 if (runtime->oss.rate != rate) {
1742 runtime->oss.params = 1;
1743 runtime->oss.rate = rate;
1744 }
f6d297df 1745 unlock_params(runtime);
1da177e4
LT		 1746 }
1747 return snd_pcm_oss_get_rate(pcm_oss_file);
1748}
1749
6ac77bc1 1750static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1751{
6ac77bc1 1752 struct snd_pcm_substream *substream;
1da177e4
LT		 1753 int err;
1754
1755 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1756 return err;
1757 return substream->runtime->oss.rate;
1758}
1759
6ac77bc1 1760static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1da177e4
LT		 1761{
1762 int idx;
1763 if (channels < 1)
1764 channels = 1;
1765 if (channels > 128)
1766 return -EINVAL;
1767 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1768 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1769 struct snd_pcm_runtime *runtime;
f6d297df
TI		 1770 int err;
1771
1da177e4
LT		 1772 if (substream == NULL)
1773 continue;
1774 runtime = substream->runtime;
f6d297df
TI		 1775 err = lock_params(runtime);
1776 if (err < 0)
1777 return err;
1da177e4
LT		 1778 if (runtime->oss.channels != channels) {
1779 runtime->oss.params = 1;
1780 runtime->oss.channels = channels;
1781 }
f6d297df 1782 unlock_params(runtime);
1da177e4
LT		 1783 }
1784 return snd_pcm_oss_get_channels(pcm_oss_file);
1785}
1786
6ac77bc1 1787static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1788{
6ac77bc1 1789 struct snd_pcm_substream *substream;
1da177e4
LT		 1790 int err;
1791
1792 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1793 return err;
1794 return substream->runtime->oss.channels;
1795}
1796
6ac77bc1 1797static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1798{
6ac77bc1 1799 struct snd_pcm_substream *substream;
1da177e4
LT		 1800 int err;
1801
1802 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1803 return err;
1804 return substream->runtime->oss.period_bytes;
1805}
1806
6ac77bc1 1807static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1808{
6ac77bc1 1809 struct snd_pcm_substream *substream;
1da177e4
LT		 1810 int err;
1811 int direct;
6ac77bc1 1812 struct snd_pcm_hw_params *params;
1da177e4 1813 unsigned int formats = 0;
e76bf3c4 1814 const struct snd_mask *format_mask;
1da177e4
LT		 1815 int fmt;
1816
1817 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1818 return err;
9c323fcb 1819 if (atomic_read(&substream->mmap_count))
1da177e4 1820 direct = 1;
060d77b9
TI		 1821 else
1822 direct = substream->oss.setup.direct;
1da177e4
LT		 1823 if (!direct)
1824 return AFMT_MU_LAW | AFMT_U8 |
1825 AFMT_S16_LE | AFMT_S16_BE |
1826 AFMT_S8 | AFMT_U16_LE |
24038a25
TI		 1827 AFMT_U16_BE |
1828 AFMT_S32_LE | AFMT_S32_BE |
7924f0ca 1829 AFMT_S24_LE | AFMT_S24_BE |
24038a25 1830 AFMT_S24_PACKED;
1da177e4
LT		 1831 params = kmalloc(sizeof(*params), GFP_KERNEL);
1832 if (!params)
1833 return -ENOMEM;
1834 _snd_pcm_hw_params_any(params);
1835 err = snd_pcm_hw_refine(substream, params);
7eaa943c 1836 if (err < 0)
01c0b426
TI		 1837 goto error;
1838 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4 1839 for (fmt = 0; fmt < 32; ++fmt) {
e76bf3c4 1840 if (snd_mask_test(format_mask, fmt)) {
f8b6c0cf 1841 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
1da177e4
LT		 1842 if (f >= 0)
1843 formats |= f;
1844 }
1845 }
01c0b426
TI		 1846
1847 error:
1848 kfree(params);
1849 return err < 0 ? err : formats;
1da177e4
LT		 1850}
1851
6ac77bc1 1852static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1da177e4
LT		 1853{
1854 int formats, idx;
f6d297df 1855 int err;
1da177e4
LT		 1856
1857 if (format != AFMT_QUERY) {
1858 formats = snd_pcm_oss_get_formats(pcm_oss_file);
5c59e09d
SF		 1859 if (formats < 0)
1860 return formats;
1da177e4
LT		 1861 if (!(formats & format))
1862 format = AFMT_U8;
1863 for (idx = 1; idx >= 0; --idx) {
6ac77bc1
TI		 1864 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1865 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1866 if (substream == NULL)
1867 continue;
1868 runtime = substream->runtime;
f6d297df
TI		 1869 err = lock_params(runtime);
1870 if (err < 0)
1871 return err;
1da177e4
LT		 1872 if (runtime->oss.format != format) {
1873 runtime->oss.params = 1;
1874 runtime->oss.format = format;
1875 }
f6d297df 1876 unlock_params(runtime);
1da177e4
LT		 1877 }
1878 }
1879 return snd_pcm_oss_get_format(pcm_oss_file);
1880}
1881
6ac77bc1 1882static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 1883{
6ac77bc1 1884 struct snd_pcm_substream *substream;
1da177e4
LT		 1885 int err;
1886
1887 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1888 return err;
1889 return substream->runtime->oss.format;
1890}
1891
6ac77bc1 1892static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1da177e4 1893{
6ac77bc1 1894 struct snd_pcm_runtime *runtime;
1da177e4 1895
1da177e4
LT		 1896 runtime = substream->runtime;
1897 if (subdivide == 0) {
1898 subdivide = runtime->oss.subdivision;
1899 if (subdivide == 0)
1900 subdivide = 1;
1901 return subdivide;
1902 }
1903 if (runtime->oss.subdivision || runtime->oss.fragshift)
1904 return -EINVAL;
1905 if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1906 subdivide != 8 && subdivide != 16)
1907 return -EINVAL;
1908 runtime->oss.subdivision = subdivide;
1909 runtime->oss.params = 1;
1910 return subdivide;
1911}
1912
6ac77bc1 1913static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1da177e4
LT		 1914{
1915 int err = -EINVAL, idx;
1916
1917 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1918 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
02a5d692
TI		 1919 struct snd_pcm_runtime *runtime;
1920
1da177e4
LT		 1921 if (substream == NULL)
1922 continue;
02a5d692 1923 runtime = substream->runtime;
f6d297df
TI		 1924 err = lock_params(runtime);
1925 if (err < 0)
1926 return err;
02a5d692 1927 err = snd_pcm_oss_set_subdivide1(substream, subdivide);
f6d297df 1928 unlock_params(runtime);
02a5d692 1929 if (err < 0)
1da177e4
LT		 1930 return err;
1931 }
1932 return err;
1933}
1934
6ac77bc1 1935static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1da177e4 1936{
6ac77bc1 1937 struct snd_pcm_runtime *runtime;
1da177e4 1938
1da177e4
LT		 1939 runtime = substream->runtime;
1940 if (runtime->oss.subdivision || runtime->oss.fragshift)
1941 return -EINVAL;
1942 runtime->oss.fragshift = val & 0xffff;
1943 runtime->oss.maxfrags = (val >> 16) & 0xffff;
1944 if (runtime->oss.fragshift < 4) /* < 16 */
1945 runtime->oss.fragshift = 4;
1946 if (runtime->oss.maxfrags < 2)
1947 runtime->oss.maxfrags = 2;
1948 runtime->oss.params = 1;
1949 return 0;
1950}
1951
6ac77bc1 1952static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1da177e4
LT		 1953{
1954 int err = -EINVAL, idx;
1955
1956 for (idx = 1; idx >= 0; --idx) {
6ac77bc1 1957 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
02a5d692
TI		 1958 struct snd_pcm_runtime *runtime;
1959
1da177e4
LT		 1960 if (substream == NULL)
1961 continue;
02a5d692 1962 runtime = substream->runtime;
f6d297df
TI		 1963 err = lock_params(runtime);
1964 if (err < 0)
1965 return err;
02a5d692 1966 err = snd_pcm_oss_set_fragment1(substream, val);
f6d297df 1967 unlock_params(runtime);
02a5d692 1968 if (err < 0)
1da177e4
LT		 1969 return err;
1970 }
1971 return err;
1972}
1973
1974static int snd_pcm_oss_nonblock(struct file * file)
1975{
db1dd4d3 1976 spin_lock(&file->f_lock);
1da177e4 1977 file->f_flags |= O_NONBLOCK;
db1dd4d3 1978 spin_unlock(&file->f_lock);
1da177e4
LT		 1979 return 0;
1980}
1981
6ac77bc1 1982static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1da177e4
LT		 1983{
1984
1985 if (substream == NULL) {
1986 res &= ~DSP_CAP_DUPLEX;
1987 return res;
1988 }
1989#ifdef DSP_CAP_MULTI
1990 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1991 if (substream->pstr->substream_count > 1)
1992 res |= DSP_CAP_MULTI;
1993#endif
1994 /* DSP_CAP_REALTIME is set all times: */
1995 /* all ALSA drivers can return actual pointer in ring buffer */
1996#if defined(DSP_CAP_REALTIME) && 0
1997 {
6ac77bc1 1998 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1999 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
2000 res &= ~DSP_CAP_REALTIME;
2001 }
2002#endif
2003 return res;
2004}
2005
6ac77bc1 2006static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2007{
2008 int result, idx;
2009
2010 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
2011 for (idx = 0; idx < 2; idx++) {
6ac77bc1 2012 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1da177e4
LT		 2013 result = snd_pcm_oss_get_caps1(substream, result);
2014 }
2015 result |= 0x0001; /* revision - same as SB AWE 64 */
2016 return result;
2017}
2018
f240406b
JK		 2019static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
2020 snd_pcm_uframes_t hw_ptr)
1da177e4 2021{
6ac77bc1 2022 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2023 snd_pcm_uframes_t appl_ptr;
2024 appl_ptr = hw_ptr + runtime->buffer_size;
2025 appl_ptr %= runtime->boundary;
2026 runtime->control->appl_ptr = appl_ptr;
2027}
2028
6ac77bc1 2029static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1da177e4 2030{
6ac77bc1
TI		 2031 struct snd_pcm_runtime *runtime;
2032 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2033 int err, cmd;
2034
2035#ifdef OSS_DEBUG
61efcee8 2036 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
1da177e4
LT		 2037#endif
2038
2039 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2040 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2041
2042 if (psubstream) {
2043 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
2044 return err;
2045 }
2046 if (csubstream) {
2047 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
2048 return err;
2049 }
2050 if (psubstream) {
2051 runtime = psubstream->runtime;
02a5d692
TI		 2052 cmd = 0;
2053 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2054 return -ERESTARTSYS;
1da177e4
LT		 2055 if (trigger & PCM_ENABLE_OUTPUT) {
2056 if (runtime->oss.trigger)
2057 goto _skip1;
9c323fcb 2058 if (atomic_read(&psubstream->mmap_count))
f240406b
JK		 2059 snd_pcm_oss_simulate_fill(psubstream,
2060 get_hw_ptr_period(runtime));
1da177e4
LT		 2061 runtime->oss.trigger = 1;
2062 runtime->start_threshold = 1;
2063 cmd = SNDRV_PCM_IOCTL_START;
2064 } else {
2065 if (!runtime->oss.trigger)
2066 goto _skip1;
2067 runtime->oss.trigger = 0;
2068 runtime->start_threshold = runtime->boundary;
2069 cmd = SNDRV_PCM_IOCTL_DROP;
2070 runtime->oss.prepare = 1;
2071 }
1da177e4 2072 _skip1:
02a5d692
TI		 2073 mutex_unlock(&runtime->oss.params_lock);
2074 if (cmd) {
2075 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
2076 if (err < 0)
2077 return err;
2078 }
2079 }
1da177e4
LT		 2080 if (csubstream) {
2081 runtime = csubstream->runtime;
02a5d692
TI		 2082 cmd = 0;
2083 if (mutex_lock_interruptible(&runtime->oss.params_lock))
2084 return -ERESTARTSYS;
1da177e4
LT		 2085 if (trigger & PCM_ENABLE_INPUT) {
2086 if (runtime->oss.trigger)
2087 goto _skip2;
2088 runtime->oss.trigger = 1;
2089 runtime->start_threshold = 1;
2090 cmd = SNDRV_PCM_IOCTL_START;
2091 } else {
2092 if (!runtime->oss.trigger)
2093 goto _skip2;
2094 runtime->oss.trigger = 0;
2095 runtime->start_threshold = runtime->boundary;
2096 cmd = SNDRV_PCM_IOCTL_DROP;
2097 runtime->oss.prepare = 1;
2098 }
1da177e4 2099 _skip2:
02a5d692
TI		 2100 mutex_unlock(&runtime->oss.params_lock);
2101 if (cmd) {
2102 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
2103 if (err < 0)
2104 return err;
2105 }
2106 }
1da177e4
LT		 2107 return 0;
2108}
2109
6ac77bc1 2110static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2111{
6ac77bc1 2112 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2113 int result = 0;
2114
2115 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2116 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2117 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
2118 result |= PCM_ENABLE_OUTPUT;
2119 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
2120 result |= PCM_ENABLE_INPUT;
2121 return result;
2122}
2123
6ac77bc1 2124static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4 2125{
6ac77bc1
TI		 2126 struct snd_pcm_substream *substream;
2127 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2128 snd_pcm_sframes_t delay;
2129 int err;
2130
2131 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2132 if (substream == NULL)
2133 return -EINVAL;
2134 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2135 return err;
2136 runtime = substream->runtime;
2137 if (runtime->oss.params || runtime->oss.prepare)
2138 return 0;
bf1bbb5a 2139 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1da177e4
LT		 2140 if (err == -EPIPE)
2141 delay = 0; /* hack for broken OSS applications */
2142 else if (err < 0)
2143 return err;
2144 return snd_pcm_oss_bytes(substream, delay);
2145}
2146
6ac77bc1 2147static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1da177e4 2148{
6ac77bc1
TI		 2149 struct snd_pcm_substream *substream;
2150 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2151 snd_pcm_sframes_t delay;
2152 int fixup;
2153 struct count_info info;
2154 int err;
2155
2156 if (_info == NULL)
2157 return -EFAULT;
2158 substream = pcm_oss_file->streams[stream];
2159 if (substream == NULL)
2160 return -EINVAL;
2161 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
2162 return err;
2163 runtime = substream->runtime;
2164 if (runtime->oss.params || runtime->oss.prepare) {
2165 memset(&info, 0, sizeof(info));
2166 if (copy_to_user(_info, &info, sizeof(info)))
2167 return -EFAULT;
2168 return 0;
2169 }
2170 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2171 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
2172 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
2173 err = 0;
2174 delay = 0;
2175 fixup = 0;
2176 } else {
2177 fixup = runtime->oss.buffer_used;
2178 }
2179 } else {
2180 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
2181 fixup = -runtime->oss.buffer_used;
2182 }
2183 if (err < 0)
2184 return err;
2185 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
9c323fcb 2186 if (atomic_read(&substream->mmap_count)) {
1da177e4 2187 snd_pcm_sframes_t n;
f240406b
JK		 2188 delay = get_hw_ptr_period(runtime);
2189 n = delay - runtime->oss.prev_hw_ptr_period;
1da177e4
LT		 2190 if (n < 0)
2191 n += runtime->boundary;
2192 info.blocks = n / runtime->period_size;
f240406b 2193 runtime->oss.prev_hw_ptr_period = delay;
1da177e4
LT		 2194 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2195 snd_pcm_oss_simulate_fill(substream, delay);
2196 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
2197 } else {
5ac0fab9 2198 delay = snd_pcm_oss_bytes(substream, delay);
fb4bd0ad 2199 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
060d77b9 2200 if (substream->oss.setup.buggyptr)
10f69f9e
TI		 2201 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
2202 else
2203 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1da177e4 2204 info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
fb4bd0ad 2205 } else {
5ac0fab9
JK		 2206 delay += fixup;
2207 info.blocks = delay / runtime->oss.period_bytes;
1da177e4 2208 info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
fb4bd0ad 2209 }
1da177e4
LT		 2210 }
2211 if (copy_to_user(_info, &info, sizeof(info)))
2212 return -EFAULT;
2213 return 0;
2214}
2215
6ac77bc1 2216static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1da177e4 2217{
6ac77bc1
TI		 2218 struct snd_pcm_substream *substream;
2219 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2220 snd_pcm_sframes_t avail;
2221 int fixup;
2222 struct audio_buf_info info;
2223 int err;
2224
2225 if (_info == NULL)
2226 return -EFAULT;
2227 substream = pcm_oss_file->streams[stream];
2228 if (substream == NULL)
2229 return -EINVAL;
2230 runtime = substream->runtime;
2231
2232 if (runtime->oss.params &&
b2483716 2233 (err = snd_pcm_oss_change_params(substream, false)) < 0)
1da177e4
LT		 2234 return err;
2235
2236 info.fragsize = runtime->oss.period_bytes;
2237 info.fragstotal = runtime->periods;
2238 if (runtime->oss.prepare) {
2239 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2240 info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
2241 info.fragments = runtime->oss.periods;
2242 } else {
2243 info.bytes = 0;
2244 info.fragments = 0;
2245 }
2246 } else {
2247 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2248 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
2249 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
2250 avail = runtime->buffer_size;
2251 err = 0;
2252 fixup = 0;
2253 } else {
2254 avail = runtime->buffer_size - avail;
2255 fixup = -runtime->oss.buffer_used;
2256 }
2257 } else {
2258 err = snd_pcm_oss_capture_position_fixup(substream, &avail);
2259 fixup = runtime->oss.buffer_used;
2260 }
2261 if (err < 0)
2262 return err;
2263 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
2264 info.fragments = info.bytes / runtime->oss.period_bytes;
2265 }
2266
2267#ifdef OSS_DEBUG
61efcee8
TI		 2268 pcm_dbg(substream->pcm,
2269 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
2270 info.bytes, info.fragments, info.fragstotal, info.fragsize);
1da177e4
LT		 2271#endif
2272 if (copy_to_user(_info, &info, sizeof(info)))
2273 return -EFAULT;
2274 return 0;
2275}
2276
6ac77bc1 2277static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1da177e4
LT		 2278{
2279 // it won't be probably implemented
61efcee8 2280 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
1da177e4
LT		 2281 return -EINVAL;
2282}
2283
060d77b9 2284static const char *strip_task_path(const char *path)
1da177e4 2285{
060d77b9
TI		 2286 const char *ptr, *ptrl = NULL;
2287 for (ptr = path; *ptr; ptr++) {
1da177e4
LT		 2288 if (*ptr == '/')
2289 ptrl = ptr + 1;
1da177e4 2290 }
060d77b9
TI		 2291 return ptrl;
2292}
2293
2294static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
2295 const char *task_name,
2296 struct snd_pcm_oss_setup *rsetup)
2297{
2298 struct snd_pcm_oss_setup *setup;
2299
2300 mutex_lock(&pcm->streams[stream].oss.setup_mutex);
2301 do {
2302 for (setup = pcm->streams[stream].oss.setup_list; setup;
2303 setup = setup->next) {
2304 if (!strcmp(setup->task_name, task_name))
2305 goto out;
1da177e4 2306 }
060d77b9
TI		 2307 } while ((task_name = strip_task_path(task_name)) != NULL);
2308 out:
2309 if (setup)
2310 *rsetup = *setup;
1a60d4c5 2311 mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1da177e4
LT		 2312}
2313
3bf75f9b
TI		 2314static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
2315{
2316 struct snd_pcm_runtime *runtime;
2317 runtime = substream->runtime;
65766ee0 2318 kvfree(runtime->oss.buffer);
3bf75f9b
TI		 2319 runtime->oss.buffer = NULL;
2320#ifdef CONFIG_SND_PCM_OSS_PLUGINS
2321 snd_pcm_oss_plugin_clear(substream);
2322#endif
2323 substream->oss.oss = 0;
2324}
2325
6ac77bc1
TI		 2326static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
2327 struct snd_pcm_oss_setup *setup,
1da177e4
LT		 2328 int minor)
2329{
6ac77bc1 2330 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2331
2332 substream->oss.oss = 1;
060d77b9 2333 substream->oss.setup = *setup;
3bf75f9b 2334 if (setup->nonblock)
0df63e44 2335 substream->f_flags |= O_NONBLOCK;
1576274d 2336 else if (setup->block)
0df63e44 2337 substream->f_flags &= ~O_NONBLOCK;
1da177e4
LT		 2338 runtime = substream->runtime;
2339 runtime->oss.params = 1;
2340 runtime->oss.trigger = 1;
2341 runtime->oss.rate = 8000;
e3a5d59a 2342 mutex_init(&runtime->oss.params_lock);
1da177e4
LT		 2343 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
2344 case SNDRV_MINOR_OSS_PCM_8:
2345 runtime->oss.format = AFMT_U8;
2346 break;
2347 case SNDRV_MINOR_OSS_PCM_16:
2348 runtime->oss.format = AFMT_S16_LE;
2349 break;
2350 default:
2351 runtime->oss.format = AFMT_MU_LAW;
2352 }
2353 runtime->oss.channels = 1;
2354 runtime->oss.fragshift = 0;
2355 runtime->oss.maxfrags = 0;
2356 runtime->oss.subdivision = 0;
3bf75f9b 2357 substream->pcm_release = snd_pcm_oss_release_substream;
40cab6e8 2358 atomic_set(&runtime->oss.rw_ref, 0);
1da177e4
LT		 2359}
2360
6ac77bc1 2361static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1da177e4
LT		 2362{
2363 int cidx;
7eaa943c
TI		 2364 if (!pcm_oss_file)
2365 return 0;
1da177e4 2366 for (cidx = 0; cidx < 2; ++cidx) {
6ac77bc1 2367 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
3bf75f9b
TI		 2368 if (substream)
2369 snd_pcm_release_substream(substream);
1da177e4
LT		 2370 }
2371 kfree(pcm_oss_file);
2372 return 0;
2373}
2374
2375static int snd_pcm_oss_open_file(struct file *file,
6ac77bc1
TI		 2376 struct snd_pcm *pcm,
2377 struct snd_pcm_oss_file **rpcm_oss_file,
1da177e4 2378 int minor,
060d77b9 2379 struct snd_pcm_oss_setup *setup)
1da177e4 2380{
3bf75f9b 2381 int idx, err;
6ac77bc1 2382 struct snd_pcm_oss_file *pcm_oss_file;
3bf75f9b 2383 struct snd_pcm_substream *substream;
aeb5d727 2384 fmode_t f_mode = file->f_mode;
1da177e4 2385
7eaa943c
TI		 2386 if (rpcm_oss_file)
2387 *rpcm_oss_file = NULL;
1da177e4 2388
ca2c0966 2389 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1da177e4
LT		 2390 if (pcm_oss_file == NULL)
2391 return -ENOMEM;
2392
2393 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
2394 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
2395 f_mode = FMODE_WRITE;
3bf75f9b 2396
0df63e44 2397 file->f_flags &= ~O_APPEND;
3bf75f9b 2398 for (idx = 0; idx < 2; idx++) {
060d77b9 2399 if (setup[idx].disable)
3bf75f9b 2400 continue;
6cb53e7e
TI		 2401 if (! pcm->streams[idx].substream_count)
2402 continue; /* no matching substream */
3bf75f9b
TI		 2403 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
2404 if (! (f_mode & FMODE_WRITE))
2405 continue;
2406 } else {
2407 if (! (f_mode & FMODE_READ))
2408 continue;
2409 }
2410 err = snd_pcm_open_substream(pcm, idx, file, &substream);
2411 if (err < 0) {
1da177e4
LT		 2412 snd_pcm_oss_release_file(pcm_oss_file);
2413 return err;
2414 }
3bf75f9b
TI		 2415
2416 pcm_oss_file->streams[idx] = substream;
060d77b9 2417 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1da177e4
LT		 2418 }
2419
bbdc1b7d 2420 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1da177e4
LT		 2421 snd_pcm_oss_release_file(pcm_oss_file);
2422 return -EINVAL;
2423 }
1da177e4
LT		 2424
2425 file->private_data = pcm_oss_file;
7eaa943c
TI		 2426 if (rpcm_oss_file)
2427 *rpcm_oss_file = pcm_oss_file;
1da177e4
LT		 2428 return 0;
2429}
2430
2431
93f2e378
TI		 2432static int snd_task_name(struct task_struct *task, char *name, size_t size)
2433{
2434 unsigned int idx;
2435
7eaa943c
TI		 2436 if (snd_BUG_ON(!task || !name || size < 2))
2437 return -EINVAL;
93f2e378
TI		 2438 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
2439 name[idx] = task->comm[idx];
2440 name[idx] = '\0';
2441 return 0;
2442}
2443
1da177e4
LT		 2444static int snd_pcm_oss_open(struct inode *inode, struct file *file)
2445{
1da177e4
LT		 2446 int err;
2447 char task_name[32];
6ac77bc1
TI		 2448 struct snd_pcm *pcm;
2449 struct snd_pcm_oss_file *pcm_oss_file;
060d77b9 2450 struct snd_pcm_oss_setup setup[2];
1da177e4 2451 int nonblock;
ac6424b9 2452 wait_queue_entry_t wait;
1da177e4 2453
02f4865f
TI		 2454 err = nonseekable_open(inode, file);
2455 if (err < 0)
2456 return err;
2457
f87135f5
CL		 2458 pcm = snd_lookup_oss_minor_data(iminor(inode),
2459 SNDRV_OSS_DEVICE_TYPE_PCM);
1da177e4
LT		 2460 if (pcm == NULL) {
2461 err = -ENODEV;
2462 goto __error1;
2463 }
2464 err = snd_card_file_add(pcm->card, file);
2465 if (err < 0)
2466 goto __error1;
2467 if (!try_module_get(pcm->card->module)) {
2468 err = -EFAULT;
2469 goto __error2;
2470 }
2471 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
2472 err = -EFAULT;
2473 goto __error;
2474 }
1576274d 2475 memset(setup, 0, sizeof(setup));
1da177e4 2476 if (file->f_mode & FMODE_WRITE)
060d77b9
TI		 2477 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
2478 task_name, &setup[0]);
1da177e4 2479 if (file->f_mode & FMODE_READ)
060d77b9
TI		 2480 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
2481 task_name, &setup[1]);
1da177e4
LT		 2482
2483 nonblock = !!(file->f_flags & O_NONBLOCK);
1da177e4
LT		 2484 if (!nonblock)
2485 nonblock = nonblock_open;
2486
2487 init_waitqueue_entry(&wait, current);
2488 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2489 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2490 while (1) {
2491 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
3bf75f9b 2492 iminor(inode), setup);
1da177e4
LT		 2493 if (err >= 0)
2494 break;
2495 if (err == -EAGAIN) {
2496 if (nonblock) {
2497 err = -EBUSY;
2498 break;
2499 }
2500 } else
2501 break;
2502 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2503 mutex_unlock(&pcm->open_mutex);
1da177e4 2504 schedule();
1a60d4c5 2505 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2506 if (pcm->card->shutdown) {
2507 err = -ENODEV;
2508 break;
2509 }
1da177e4
LT		 2510 if (signal_pending(current)) {
2511 err = -ERESTARTSYS;
2512 break;
2513 }
2514 }
2515 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2516 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2517 if (err < 0)
2518 goto __error;
8bb4d9ce 2519 snd_card_unref(pcm->card);
1da177e4
LT		 2520 return err;
2521
2522 __error:
2523 module_put(pcm->card->module);
2524 __error2:
2525 snd_card_file_remove(pcm->card, file);
2526 __error1:
a0830dbd
TI		 2527 if (pcm)
2528 snd_card_unref(pcm->card);
1da177e4
LT		 2529 return err;
2530}
2531
2532static int snd_pcm_oss_release(struct inode *inode, struct file *file)
2533{
6ac77bc1
TI		 2534 struct snd_pcm *pcm;
2535 struct snd_pcm_substream *substream;
2536 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2537
2538 pcm_oss_file = file->private_data;
2539 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2540 if (substream == NULL)
2541 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
7eaa943c
TI		 2542 if (snd_BUG_ON(!substream))
2543 return -ENXIO;
1da177e4 2544 pcm = substream->pcm;
de1b8b93
TI		 2545 if (!pcm->card->shutdown)
2546 snd_pcm_oss_sync(pcm_oss_file);
1a60d4c5 2547 mutex_lock(&pcm->open_mutex);
1da177e4 2548 snd_pcm_oss_release_file(pcm_oss_file);
1a60d4c5 2549 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2550 wake_up(&pcm->open_wait);
2551 module_put(pcm->card->module);
2552 snd_card_file_remove(pcm->card, file);
2553 return 0;
2554}
2555
2556static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2557{
6ac77bc1 2558 struct snd_pcm_oss_file *pcm_oss_file;
1da177e4
LT		 2559 int __user *p = (int __user *)arg;
2560 int res;
2561
2562 pcm_oss_file = file->private_data;
2563 if (cmd == OSS_GETVERSION)
2564 return put_user(SNDRV_OSS_VERSION, p);
2565 if (cmd == OSS_ALSAEMULVER)
2566 return put_user(1, p);
658355b5 2567#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
1da177e4 2568 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
6ac77bc1 2569 struct snd_pcm_substream *substream;
1da177e4
LT		 2570 int idx;
2571 for (idx = 0; idx < 2; ++idx) {
2572 substream = pcm_oss_file->streams[idx];
2573 if (substream != NULL)
2574 break;
2575 }
7eaa943c
TI		 2576 if (snd_BUG_ON(idx >= 2))
2577 return -ENXIO;
1da177e4
LT		 2578 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
2579 }
2580#endif
2581 if (((cmd >> 8) & 0xff) != 'P')
2582 return -EINVAL;
2583#ifdef OSS_DEBUG
61efcee8 2584 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
1da177e4
LT		 2585#endif
2586 switch (cmd) {
2587 case SNDCTL_DSP_RESET:
2588 return snd_pcm_oss_reset(pcm_oss_file);
2589 case SNDCTL_DSP_SYNC:
2590 return snd_pcm_oss_sync(pcm_oss_file);
2591 case SNDCTL_DSP_SPEED:
2592 if (get_user(res, p))
2593 return -EFAULT;
2594 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
2595 return res;
2596 return put_user(res, p);
2597 case SOUND_PCM_READ_RATE:
2598 res = snd_pcm_oss_get_rate(pcm_oss_file);
2599 if (res < 0)
2600 return res;
2601 return put_user(res, p);
2602 case SNDCTL_DSP_STEREO:
2603 if (get_user(res, p))
2604 return -EFAULT;
2605 res = res > 0 ? 2 : 1;
2606 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2607 return res;
2608 return put_user(--res, p);
2609 case SNDCTL_DSP_GETBLKSIZE:
2610 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2611 if (res < 0)
2612 return res;
2613 return put_user(res, p);
2614 case SNDCTL_DSP_SETFMT:
2615 if (get_user(res, p))
2616 return -EFAULT;
2617 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2618 if (res < 0)
2619 return res;
2620 return put_user(res, p);
2621 case SOUND_PCM_READ_BITS:
2622 res = snd_pcm_oss_get_format(pcm_oss_file);
2623 if (res < 0)
2624 return res;
2625 return put_user(res, p);
2626 case SNDCTL_DSP_CHANNELS:
2627 if (get_user(res, p))
2628 return -EFAULT;
2629 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2630 if (res < 0)
2631 return res;
2632 return put_user(res, p);
2633 case SOUND_PCM_READ_CHANNELS:
2634 res = snd_pcm_oss_get_channels(pcm_oss_file);
2635 if (res < 0)
2636 return res;
2637 return put_user(res, p);
2638 case SOUND_PCM_WRITE_FILTER:
2639 case SOUND_PCM_READ_FILTER:
2640 return -EIO;
2641 case SNDCTL_DSP_POST:
2642 return snd_pcm_oss_post(pcm_oss_file);
2643 case SNDCTL_DSP_SUBDIVIDE:
2644 if (get_user(res, p))
2645 return -EFAULT;
2646 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2647 if (res < 0)
2648 return res;
2649 return put_user(res, p);
2650 case SNDCTL_DSP_SETFRAGMENT:
2651 if (get_user(res, p))
2652 return -EFAULT;
2653 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2654 case SNDCTL_DSP_GETFMTS:
2655 res = snd_pcm_oss_get_formats(pcm_oss_file);
2656 if (res < 0)
2657 return res;
2658 return put_user(res, p);
2659 case SNDCTL_DSP_GETOSPACE:
2660 case SNDCTL_DSP_GETISPACE:
2661 return snd_pcm_oss_get_space(pcm_oss_file,
2662 cmd == SNDCTL_DSP_GETISPACE ?
2663 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2664 (struct audio_buf_info __user *) arg);
2665 case SNDCTL_DSP_NONBLOCK:
2666 return snd_pcm_oss_nonblock(file);
2667 case SNDCTL_DSP_GETCAPS:
2668 res = snd_pcm_oss_get_caps(pcm_oss_file);
2669 if (res < 0)
2670 return res;
2671 return put_user(res, p);
2672 case SNDCTL_DSP_GETTRIGGER:
2673 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2674 if (res < 0)
2675 return res;
2676 return put_user(res, p);
2677 case SNDCTL_DSP_SETTRIGGER:
2678 if (get_user(res, p))
2679 return -EFAULT;
2680 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2681 case SNDCTL_DSP_GETIPTR:
2682 case SNDCTL_DSP_GETOPTR:
2683 return snd_pcm_oss_get_ptr(pcm_oss_file,
2684 cmd == SNDCTL_DSP_GETIPTR ?
2685 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2686 (struct count_info __user *) arg);
2687 case SNDCTL_DSP_MAPINBUF:
2688 case SNDCTL_DSP_MAPOUTBUF:
2689 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2690 cmd == SNDCTL_DSP_MAPINBUF ?
2691 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2692 (struct buffmem_desc __user *) arg);
2693 case SNDCTL_DSP_SETSYNCRO:
2694 /* stop DMA now.. */
2695 return 0;
2696 case SNDCTL_DSP_SETDUPLEX:
2697 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2698 return 0;
2699 return -EIO;
2700 case SNDCTL_DSP_GETODELAY:
2701 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2702 if (res < 0) {
2703 /* it's for sure, some broken apps don't check for error codes */
2704 put_user(0, p);
2705 return res;
2706 }
2707 return put_user(res, p);
2708 case SNDCTL_DSP_PROFILE:
2709 return 0; /* silently ignore */
2710 default:
61efcee8 2711 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
1da177e4
LT		 2712 }
2713 return -EINVAL;
2714}
2715
2716#ifdef CONFIG_COMPAT
2717/* all compatible */
83266b6b
TI		 2718static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
2719 unsigned long arg)
2720{
2022ca0a
AB		 2721 /*
2722 * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
2723 * which are not implemented for the native case either
2724 */
83266b6b
TI		 2725 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2726}
1da177e4
LT		 2727#else
2728#define snd_pcm_oss_ioctl_compat NULL
2729#endif
2730
2731static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2732{
6ac77bc1
TI		 2733 struct snd_pcm_oss_file *pcm_oss_file;
2734 struct snd_pcm_substream *substream;
1da177e4
LT		 2735
2736 pcm_oss_file = file->private_data;
2737 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2738 if (substream == NULL)
2739 return -ENXIO;
0df63e44 2740 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4
LT		 2741#ifndef OSS_DEBUG
2742 return snd_pcm_oss_read1(substream, buf, count);
2743#else
2744 {
2745 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
61efcee8
TI		 2746 pcm_dbg(substream->pcm,
2747 "pcm_oss: read %li bytes (returned %li bytes)\n",
2748 (long)count, (long)res);
1da177e4
LT		 2749 return res;
2750 }
2751#endif
2752}
2753
2754static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2755{
6ac77bc1
TI		 2756 struct snd_pcm_oss_file *pcm_oss_file;
2757 struct snd_pcm_substream *substream;
1da177e4
LT		 2758 long result;
2759
2760 pcm_oss_file = file->private_data;
2761 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2762 if (substream == NULL)
2763 return -ENXIO;
0df63e44 2764 substream->f_flags = file->f_flags & O_NONBLOCK;
1da177e4 2765 result = snd_pcm_oss_write1(substream, buf, count);
1da177e4 2766#ifdef OSS_DEBUG
61efcee8 2767 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
006de267 2768 (long)count, (long)result);
1da177e4
LT		 2769#endif
2770 return result;
2771}
2772
6ac77bc1 2773static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
1da177e4 2774{
6ac77bc1 2775 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2776 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2777 return runtime->oss.prev_hw_ptr_period !=
2778 get_hw_ptr_period(runtime);
1da177e4 2779 else
f240406b
JK		 2780 return snd_pcm_playback_avail(runtime) >=
2781 runtime->oss.period_frames;
1da177e4
LT		 2782}
2783
6ac77bc1 2784static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
1da177e4 2785{
6ac77bc1 2786 struct snd_pcm_runtime *runtime = substream->runtime;
9c323fcb 2787 if (atomic_read(&substream->mmap_count))
f240406b
JK		 2788 return runtime->oss.prev_hw_ptr_period !=
2789 get_hw_ptr_period(runtime);
1da177e4 2790 else
f240406b
JK		 2791 return snd_pcm_capture_avail(runtime) >=
2792 runtime->oss.period_frames;
1da177e4
LT		 2793}
2794
680ef72a 2795static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
1da177e4 2796{
6ac77bc1 2797 struct snd_pcm_oss_file *pcm_oss_file;
680ef72a 2798 __poll_t mask;
6ac77bc1 2799 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1da177e4
LT		 2800
2801 pcm_oss_file = file->private_data;
2802
2803 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2804 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2805
2806 mask = 0;
2807 if (psubstream != NULL) {
6ac77bc1 2808 struct snd_pcm_runtime *runtime = psubstream->runtime;
1da177e4
LT		 2809 poll_wait(file, &runtime->sleep, wait);
2810 snd_pcm_stream_lock_irq(psubstream);
2811 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2812 (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2813 snd_pcm_oss_playback_ready(psubstream)))
a9a08845 2814 mask |= EPOLLOUT | EPOLLWRNORM;
1da177e4
LT		 2815 snd_pcm_stream_unlock_irq(psubstream);
2816 }
2817 if (csubstream != NULL) {
6ac77bc1
TI		 2818 struct snd_pcm_runtime *runtime = csubstream->runtime;
2819 snd_pcm_state_t ostate;
1da177e4
LT		 2820 poll_wait(file, &runtime->sleep, wait);
2821 snd_pcm_stream_lock_irq(csubstream);
2822 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2823 snd_pcm_oss_capture_ready(csubstream))
a9a08845 2824 mask |= EPOLLIN | EPOLLRDNORM;
1da177e4
LT		 2825 snd_pcm_stream_unlock_irq(csubstream);
2826 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
6ac77bc1 2827 struct snd_pcm_oss_file ofile;
1da177e4
LT		 2828 memset(&ofile, 0, sizeof(ofile));
2829 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2830 runtime->oss.trigger = 0;
2831 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2832 }
2833 }
2834
2835 return mask;
2836}
2837
2838static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2839{
6ac77bc1
TI		 2840 struct snd_pcm_oss_file *pcm_oss_file;
2841 struct snd_pcm_substream *substream = NULL;
2842 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2843 int err;
2844
2845#ifdef OSS_DEBUG
61efcee8 2846 pr_debug("pcm_oss: mmap begin\n");
1da177e4
LT		 2847#endif
2848 pcm_oss_file = file->private_data;
2849 switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2850 case VM_READ | VM_WRITE:
2851 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2852 if (substream)
2853 break;
2854 /* Fall through */
2855 case VM_READ:
2856 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2857 break;
2858 case VM_WRITE:
2859 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2860 break;
2861 default:
2862 return -EINVAL;
2863 }
2864 /* set VM_READ access as well to fix memset() routines that do
2865 reads before writes (to improve performance) */
2866 area->vm_flags |= VM_READ;
2867 if (substream == NULL)
2868 return -ENXIO;
2869 runtime = substream->runtime;
2870 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2871 return -EIO;
2872 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2873 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2874 else
2875 return -EIO;
2876
2877 if (runtime->oss.params) {
b2483716 2878 /* use mutex_trylock() for params_lock for avoiding a deadlock
c1e8d7c6 2879 * between mmap_lock and params_lock taken by
b2483716
TI		 2880 * copy_from/to_user() in snd_pcm_oss_write/read()
2881 */
2882 err = snd_pcm_oss_change_params(substream, true);
2883 if (err < 0)
1da177e4
LT		 2884 return err;
2885 }
21a3479a 2886#ifdef CONFIG_SND_PCM_OSS_PLUGINS
1da177e4
LT		 2887 if (runtime->oss.plugin_first != NULL)
2888 return -EIO;
21a3479a 2889#endif
1da177e4
LT		 2890
2891 if (area->vm_pgoff != 0)
2892 return -EINVAL;
2893
2894 err = snd_pcm_mmap_data(substream, file, area);
2895 if (err < 0)
2896 return err;
2897 runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2898 runtime->silence_threshold = 0;
2899 runtime->silence_size = 0;
2900#ifdef OSS_DEBUG
61efcee8 2901 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
006de267 2902 runtime->oss.mmap_bytes);
1da177e4
LT		 2903#endif
2904 /* In mmap mode we never stop */
2905 runtime->stop_threshold = runtime->boundary;
2906
2907 return 0;
2908}
2909
b7d90a35 2910#ifdef CONFIG_SND_VERBOSE_PROCFS
1da177e4
LT		 2911/*
2912 * /proc interface
2913 */
2914
6ac77bc1
TI		 2915static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2916 struct snd_info_buffer *buffer)
1da177e4 2917{
6ac77bc1
TI		 2918 struct snd_pcm_str *pstr = entry->private_data;
2919 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
1a60d4c5 2920 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2921 while (setup) {
2922 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2923 setup->task_name,
2924 setup->periods,
2925 setup->period_size,
2926 setup->disable ? " disable" : "",
2927 setup->direct ? " direct" : "",
2928 setup->block ? " block" : "",
2929 setup->nonblock ? " non-block" : "",
2930 setup->partialfrag ? " partial-frag" : "",
2931 setup->nosilence ? " no-silence" : "");
2932 setup = setup->next;
2933 }
1a60d4c5 2934 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2935}
2936
6ac77bc1 2937static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
1da177e4 2938{
6ac77bc1 2939 struct snd_pcm_oss_setup *setup, *setupn;
1da177e4 2940
1da177e4
LT		 2941 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2942 setup; setup = setupn) {
2943 setupn = setup->next;
2944 kfree(setup->task_name);
2945 kfree(setup);
2946 }
2947 pstr->oss.setup_list = NULL;
2948}
2949
6ac77bc1
TI		 2950static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2951 struct snd_info_buffer *buffer)
1da177e4 2952{
6ac77bc1 2953 struct snd_pcm_str *pstr = entry->private_data;
4f7454a9
TI		 2954 char line[128], str[32], task_name[32];
2955 const char *ptr;
1da177e4 2956 int idx1;
6ac77bc1 2957 struct snd_pcm_oss_setup *setup, *setup1, template;
1da177e4
LT		 2958
2959 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1a60d4c5 2960 mutex_lock(&pstr->oss.setup_mutex);
1da177e4
LT		 2961 memset(&template, 0, sizeof(template));
2962 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2963 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2964 snd_pcm_oss_proc_free_setup_list(pstr);
1a60d4c5 2965 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 2966 continue;
2967 }
2968 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2969 if (!strcmp(setup->task_name, task_name)) {
2970 template = *setup;
2971 break;
2972 }
2973 }
2974 ptr = snd_info_get_str(str, ptr, sizeof(str));
2975 template.periods = simple_strtoul(str, NULL, 10);
2976 ptr = snd_info_get_str(str, ptr, sizeof(str));
2977 template.period_size = simple_strtoul(str, NULL, 10);
2978 for (idx1 = 31; idx1 >= 0; idx1--)
2979 if (template.period_size & (1 << idx1))
2980 break;
2981 for (idx1--; idx1 >= 0; idx1--)
2982 template.period_size &= ~(1 << idx1);
2983 do {
2984 ptr = snd_info_get_str(str, ptr, sizeof(str));
2985 if (!strcmp(str, "disable")) {
2986 template.disable = 1;
2987 } else if (!strcmp(str, "direct")) {
2988 template.direct = 1;
2989 } else if (!strcmp(str, "block")) {
2990 template.block = 1;
2991 } else if (!strcmp(str, "non-block")) {
2992 template.nonblock = 1;
2993 } else if (!strcmp(str, "partial-frag")) {
2994 template.partialfrag = 1;
2995 } else if (!strcmp(str, "no-silence")) {
2996 template.nosilence = 1;
10f69f9e
TI		 2997 } else if (!strcmp(str, "buggy-ptr")) {
2998 template.buggyptr = 1;
1da177e4
LT		 2999 }
3000 } while (*str);
3001 if (setup == NULL) {
060d77b9
TI		 3002 setup = kmalloc(sizeof(*setup), GFP_KERNEL);
3003 if (! setup) {
3004 buffer->error = -ENOMEM;
91054598 3005 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9
TI		 3006 return;
3007 }
3008 if (pstr->oss.setup_list == NULL)
3009 pstr->oss.setup_list = setup;
3010 else {
3011 for (setup1 = pstr->oss.setup_list;
3012 setup1->next; setup1 = setup1->next);
3013 setup1->next = setup;
3014 }
3015 template.task_name = kstrdup(task_name, GFP_KERNEL);
3016 if (! template.task_name) {
3017 kfree(setup);
1da177e4 3018 buffer->error = -ENOMEM;
91054598 3019 mutex_unlock(&pstr->oss.setup_mutex);
060d77b9 3020 return;
1da177e4
LT		 3021 }
3022 }
060d77b9 3023 *setup = template;
1a60d4c5 3024 mutex_unlock(&pstr->oss.setup_mutex);
1da177e4
LT		 3025 }
3026}
3027
6ac77bc1 3028static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
1da177e4
LT		 3029{
3030 int stream;
3031 for (stream = 0; stream < 2; ++stream) {
6ac77bc1
TI		 3032 struct snd_info_entry *entry;
3033 struct snd_pcm_str *pstr = &pcm->streams[stream];
1da177e4
LT		 3034 if (pstr->substream_count == 0)
3035 continue;
3036 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
3037 entry->content = SNDRV_INFO_CONTENT_TEXT;
6a73cf46 3038 entry->mode = S_IFREG | 0644;
1da177e4 3039 entry->c.text.read = snd_pcm_oss_proc_read;
1da177e4
LT		 3040 entry->c.text.write = snd_pcm_oss_proc_write;
3041 entry->private_data = pstr;
3042 if (snd_info_register(entry) < 0) {
3043 snd_info_free_entry(entry);
3044 entry = NULL;
3045 }
3046 }
3047 pstr->oss.proc_entry = entry;
3048 }
3049}
3050
6ac77bc1 3051static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
1da177e4
LT		 3052{
3053 int stream;
3054 for (stream = 0; stream < 2; ++stream) {
6ac77bc1 3055 struct snd_pcm_str *pstr = &pcm->streams[stream];
746d4a02
TI		 3056 snd_info_free_entry(pstr->oss.proc_entry);
3057 pstr->oss.proc_entry = NULL;
3058 snd_pcm_oss_proc_free_setup_list(pstr);
1da177e4
LT		 3059 }
3060}
b7d90a35 3061#else /* !CONFIG_SND_VERBOSE_PROCFS */
04f141a8
TI		 3062#define snd_pcm_oss_proc_init(pcm)
3063#define snd_pcm_oss_proc_done(pcm)
b7d90a35 3064#endif /* CONFIG_SND_VERBOSE_PROCFS */
1da177e4
LT		 3065
3066/*
3067 * ENTRY functions
3068 */
3069
9c2e08c5 3070static const struct file_operations snd_pcm_oss_f_reg =
1da177e4
LT		 3071{
3072 .owner = THIS_MODULE,
3073 .read = snd_pcm_oss_read,
3074 .write = snd_pcm_oss_write,
3075 .open = snd_pcm_oss_open,
3076 .release = snd_pcm_oss_release,
02f4865f 3077 .llseek = no_llseek,
1da177e4
LT		 3078 .poll = snd_pcm_oss_poll,
3079 .unlocked_ioctl = snd_pcm_oss_ioctl,
3080 .compat_ioctl = snd_pcm_oss_ioctl_compat,
3081 .mmap = snd_pcm_oss_mmap,
3082};
3083
6ac77bc1 3084static void register_oss_dsp(struct snd_pcm *pcm, int index)
1da177e4 3085{
1da177e4 3086 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2af677fc 3087 pcm->card, index, &snd_pcm_oss_f_reg,
80d7d771 3088 pcm) < 0) {
61efcee8 3089 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
d3d579f8 3090 pcm->card->number, pcm->device);
1da177e4
LT		 3091 }
3092}
3093
6ac77bc1 3094static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
1da177e4
LT		 3095{
3096 pcm->oss.reg = 0;
896e6cc2 3097 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3098 char name[128];
3099 int duplex;
3100 register_oss_dsp(pcm, 0);
3101 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
3102 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
3103 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
3104 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
3105#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3106 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
3107 pcm->card->number,
3108 name);
3109#endif
3110 pcm->oss.reg++;
3111 pcm->oss.reg_mask |= 1;
3112 }
896e6cc2 3113 if (adsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3114 register_oss_dsp(pcm, 1);
3115 pcm->oss.reg++;
3116 pcm->oss.reg_mask |= 2;
3117 }
3118
3119 if (pcm->oss.reg)
3120 snd_pcm_oss_proc_init(pcm);
3121
3122 return 0;
3123}
3124
6ac77bc1 3125static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
1da177e4
LT		 3126{
3127 if (pcm->oss.reg) {
3128 if (pcm->oss.reg_mask & 1) {
3129 pcm->oss.reg_mask &= ~1;
3130 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3131 pcm->card, 0);
3132 }
3133 if (pcm->oss.reg_mask & 2) {
3134 pcm->oss.reg_mask &= ~2;
3135 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
3136 pcm->card, 1);
3137 }
896e6cc2 3138 if (dsp_map[pcm->card->number] == (int)pcm->device) {
1da177e4
LT		 3139#ifdef SNDRV_OSS_INFO_DEV_AUDIO
3140 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
3141#endif
3142 }
3143 pcm->oss.reg = 0;
1da177e4
LT		 3144 }
3145 return 0;
3146}
3147
c461482c
TI		 3148static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
3149{
3150 snd_pcm_oss_disconnect_minor(pcm);
3151 snd_pcm_oss_proc_done(pcm);
3152 return 0;
3153}
3154
6ac77bc1 3155static struct snd_pcm_notify snd_pcm_oss_notify =
1da177e4
LT		 3156{
3157 .n_register = snd_pcm_oss_register_minor,
3158 .n_disconnect = snd_pcm_oss_disconnect_minor,
3159 .n_unregister = snd_pcm_oss_unregister_minor,
3160};
3161
3162static int __init alsa_pcm_oss_init(void)
3163{
3164 int i;
3165 int err;
3166
3167 /* check device map table */
3168 for (i = 0; i < SNDRV_CARDS; i++) {
896e6cc2 3169 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3170 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
d3d579f8 3171 i, dsp_map[i]);
1da177e4
LT		 3172 dsp_map[i] = 0;
3173 }
896e6cc2 3174 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
61efcee8 3175 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
d3d579f8 3176 i, adsp_map[i]);
1da177e4
LT		 3177 adsp_map[i] = 1;
3178 }
3179 }
3180 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
3181 return err;
3182 return 0;
3183}
3184
3185static void __exit alsa_pcm_oss_exit(void)
3186{
3187 snd_pcm_notify(&snd_pcm_oss_notify, 1);
3188}
3189
3190module_init(alsa_pcm_oss_init)
3191module_exit(alsa_pcm_oss_exit)
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