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[ALSA] hda: fix typo for xw4400 PCI sub-ID
[mirror_ubuntu-artful-kernel.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#include <sound/driver.h>
23#include <linux/mm.h>
24#include <linux/smp_lock.h>
25#include <linux/file.h>
26#include <linux/slab.h>
27#include <linux/time.h>
9442e691 28#include <linux/latency.h>
1da177e4
LT		 29#include <linux/uio.h>
30#include <sound/core.h>
31#include <sound/control.h>
32#include <sound/info.h>
33#include <sound/pcm.h>
34#include <sound/pcm_params.h>
35#include <sound/timer.h>
36#include <sound/minors.h>
37#include <asm/io.h>
38
39/*
40 * Compatibility
41 */
42
877211f5 43struct snd_pcm_hw_params_old {
1da177e4
LT		 44 unsigned int flags;
45 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
46 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 47 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
49 unsigned int rmask;
50 unsigned int cmask;
51 unsigned int info;
52 unsigned int msbits;
53 unsigned int rate_num;
54 unsigned int rate_den;
877211f5 55 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 56 unsigned char reserved[64];
57};
58
59d48582 59#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 60#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 62
877211f5
TI		 63static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params_old __user * _oparams);
65static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 67#endif
f87135f5 68static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 69
70/*
71 *
72 */
73
74DEFINE_RWLOCK(snd_pcm_link_rwlock);
e88e8ae6 75EXPORT_SYMBOL(snd_pcm_link_rwlock);
1da177e4 76
e88e8ae6 77static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4
LT		 78
79static inline mm_segment_t snd_enter_user(void)
80{
81 mm_segment_t fs = get_fs();
82 set_fs(get_ds());
83 return fs;
84}
85
86static inline void snd_leave_user(mm_segment_t fs)
87{
88 set_fs(fs);
89}
90
91
92
877211f5 93int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 94{
877211f5
TI		 95 struct snd_pcm_runtime *runtime;
96 struct snd_pcm *pcm = substream->pcm;
97 struct snd_pcm_str *pstr = substream->pstr;
1da177e4
LT		 98
99 snd_assert(substream != NULL, return -ENXIO);
100 memset(info, 0, sizeof(*info));
101 info->card = pcm->card->number;
102 info->device = pcm->device;
103 info->stream = substream->stream;
104 info->subdevice = substream->number;
105 strlcpy(info->id, pcm->id, sizeof(info->id));
106 strlcpy(info->name, pcm->name, sizeof(info->name));
107 info->dev_class = pcm->dev_class;
108 info->dev_subclass = pcm->dev_subclass;
109 info->subdevices_count = pstr->substream_count;
110 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
111 strlcpy(info->subname, substream->name, sizeof(info->subname));
112 runtime = substream->runtime;
113 /* AB: FIXME!!! This is definitely nonsense */
114 if (runtime) {
115 info->sync = runtime->sync;
116 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
117 }
118 return 0;
119}
120
877211f5
TI		 121int snd_pcm_info_user(struct snd_pcm_substream *substream,
122 struct snd_pcm_info __user * _info)
1da177e4 123{
877211f5 124 struct snd_pcm_info *info;
1da177e4
LT		 125 int err;
126
127 info = kmalloc(sizeof(*info), GFP_KERNEL);
128 if (! info)
129 return -ENOMEM;
130 err = snd_pcm_info(substream, info);
131 if (err >= 0) {
132 if (copy_to_user(_info, info, sizeof(*info)))
133 err = -EFAULT;
134 }
135 kfree(info);
136 return err;
137}
138
139#undef RULES_DEBUG
140
141#ifdef RULES_DEBUG
142#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
143char *snd_pcm_hw_param_names[] = {
144 HW_PARAM(ACCESS),
145 HW_PARAM(FORMAT),
146 HW_PARAM(SUBFORMAT),
147 HW_PARAM(SAMPLE_BITS),
148 HW_PARAM(FRAME_BITS),
149 HW_PARAM(CHANNELS),
150 HW_PARAM(RATE),
151 HW_PARAM(PERIOD_TIME),
152 HW_PARAM(PERIOD_SIZE),
153 HW_PARAM(PERIOD_BYTES),
154 HW_PARAM(PERIODS),
155 HW_PARAM(BUFFER_TIME),
156 HW_PARAM(BUFFER_SIZE),
157 HW_PARAM(BUFFER_BYTES),
158 HW_PARAM(TICK_TIME),
159};
160#endif
161
877211f5
TI		 162int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
163 struct snd_pcm_hw_params *params)
1da177e4
LT		 164{
165 unsigned int k;
877211f5
TI		 166 struct snd_pcm_hardware *hw;
167 struct snd_interval *i = NULL;
168 struct snd_mask *m = NULL;
169 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 170 unsigned int rstamps[constrs->rules_num];
171 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
172 unsigned int stamp = 2;
173 int changed, again;
174
175 params->info = 0;
176 params->fifo_size = 0;
177 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
178 params->msbits = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
180 params->rate_num = 0;
181 params->rate_den = 0;
182 }
183
184 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
185 m = hw_param_mask(params, k);
186 if (snd_mask_empty(m))
187 return -EINVAL;
188 if (!(params->rmask & (1 << k)))
189 continue;
190#ifdef RULES_DEBUG
191 printk("%s = ", snd_pcm_hw_param_names[k]);
192 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
193#endif
194 changed = snd_mask_refine(m, constrs_mask(constrs, k));
195#ifdef RULES_DEBUG
196 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
197#endif
198 if (changed)
199 params->cmask |= 1 << k;
200 if (changed < 0)
201 return changed;
202 }
203
204 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
205 i = hw_param_interval(params, k);
206 if (snd_interval_empty(i))
207 return -EINVAL;
208 if (!(params->rmask & (1 << k)))
209 continue;
210#ifdef RULES_DEBUG
211 printk("%s = ", snd_pcm_hw_param_names[k]);
212 if (i->empty)
213 printk("empty");
214 else
215 printk("%c%u %u%c",
216 i->openmin ? '(' : '[', i->min,
217 i->max, i->openmax ? ')' : ']');
218 printk(" -> ");
219#endif
220 changed = snd_interval_refine(i, constrs_interval(constrs, k));
221#ifdef RULES_DEBUG
222 if (i->empty)
223 printk("empty\n");
224 else
225 printk("%c%u %u%c\n",
226 i->openmin ? '(' : '[', i->min,
227 i->max, i->openmax ? ')' : ']');
228#endif
229 if (changed)
230 params->cmask |= 1 << k;
231 if (changed < 0)
232 return changed;
233 }
234
235 for (k = 0; k < constrs->rules_num; k++)
236 rstamps[k] = 0;
237 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
238 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
239 do {
240 again = 0;
241 for (k = 0; k < constrs->rules_num; k++) {
877211f5 242 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 243 unsigned int d;
244 int doit = 0;
245 if (r->cond && !(r->cond & params->flags))
246 continue;
247 for (d = 0; r->deps[d] >= 0; d++) {
248 if (vstamps[r->deps[d]] > rstamps[k]) {
249 doit = 1;
250 break;
251 }
252 }
253 if (!doit)
254 continue;
255#ifdef RULES_DEBUG
256 printk("Rule %d [%p]: ", k, r->func);
257 if (r->var >= 0) {
258 printk("%s = ", snd_pcm_hw_param_names[r->var]);
259 if (hw_is_mask(r->var)) {
260 m = hw_param_mask(params, r->var);
261 printk("%x", *m->bits);
262 } else {
263 i = hw_param_interval(params, r->var);
264 if (i->empty)
265 printk("empty");
266 else
267 printk("%c%u %u%c",
268 i->openmin ? '(' : '[', i->min,
269 i->max, i->openmax ? ')' : ']');
270 }
271 }
272#endif
273 changed = r->func(params, r);
274#ifdef RULES_DEBUG
275 if (r->var >= 0) {
276 printk(" -> ");
277 if (hw_is_mask(r->var))
278 printk("%x", *m->bits);
279 else {
280 if (i->empty)
281 printk("empty");
282 else
283 printk("%c%u %u%c",
284 i->openmin ? '(' : '[', i->min,
285 i->max, i->openmax ? ')' : ']');
286 }
287 }
288 printk("\n");
289#endif
290 rstamps[k] = stamp;
291 if (changed && r->var >= 0) {
292 params->cmask |= (1 << r->var);
293 vstamps[r->var] = stamp;
294 again = 1;
295 }
296 if (changed < 0)
297 return changed;
298 stamp++;
299 }
300 } while (again);
301 if (!params->msbits) {
302 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
303 if (snd_interval_single(i))
304 params->msbits = snd_interval_value(i);
305 }
306
307 if (!params->rate_den) {
308 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
309 if (snd_interval_single(i)) {
310 params->rate_num = snd_interval_value(i);
311 params->rate_den = 1;
312 }
313 }
314
315 hw = &substream->runtime->hw;
316 if (!params->info)
317 params->info = hw->info;
318 if (!params->fifo_size)
319 params->fifo_size = hw->fifo_size;
320 params->rmask = 0;
321 return 0;
322}
323
e88e8ae6
TI		 324EXPORT_SYMBOL(snd_pcm_hw_refine);
325
877211f5
TI		 326static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
327 struct snd_pcm_hw_params __user * _params)
1da177e4 328{
877211f5 329 struct snd_pcm_hw_params *params;
1da177e4
LT		 330 int err;
331
332 params = kmalloc(sizeof(*params), GFP_KERNEL);
333 if (!params) {
334 err = -ENOMEM;
335 goto out;
336 }
337 if (copy_from_user(params, _params, sizeof(*params))) {
338 err = -EFAULT;
339 goto out;
340 }
341 err = snd_pcm_hw_refine(substream, params);
342 if (copy_to_user(_params, params, sizeof(*params))) {
343 if (!err)
344 err = -EFAULT;
345 }
346out:
347 kfree(params);
348 return err;
349}
350
9442e691
TI		 351static int period_to_usecs(struct snd_pcm_runtime *runtime)
352{
353 int usecs;
354
355 if (! runtime->rate)
356 return -1; /* invalid */
357
358 /* take 75% of period time as the deadline */
359 usecs = (750000 / runtime->rate) * runtime->period_size;
360 usecs += ((750000 % runtime->rate) * runtime->period_size) /
361 runtime->rate;
362
363 return usecs;
364}
365
877211f5
TI		 366static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
367 struct snd_pcm_hw_params *params)
1da177e4 368{
877211f5 369 struct snd_pcm_runtime *runtime;
9442e691 370 int err, usecs;
1da177e4
LT		 371 unsigned int bits;
372 snd_pcm_uframes_t frames;
373
374 snd_assert(substream != NULL, return -ENXIO);
375 runtime = substream->runtime;
376 snd_assert(runtime != NULL, return -ENXIO);
377 snd_pcm_stream_lock_irq(substream);
378 switch (runtime->status->state) {
379 case SNDRV_PCM_STATE_OPEN:
380 case SNDRV_PCM_STATE_SETUP:
381 case SNDRV_PCM_STATE_PREPARED:
382 break;
383 default:
384 snd_pcm_stream_unlock_irq(substream);
385 return -EBADFD;
386 }
387 snd_pcm_stream_unlock_irq(substream);
388#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
389 if (!substream->oss.oss)
390#endif
9c323fcb 391 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 392 return -EBADFD;
393
394 params->rmask = ~0U;
395 err = snd_pcm_hw_refine(substream, params);
396 if (err < 0)
397 goto _error;
398
399 err = snd_pcm_hw_params_choose(substream, params);
400 if (err < 0)
401 goto _error;
402
403 if (substream->ops->hw_params != NULL) {
404 err = substream->ops->hw_params(substream, params);
405 if (err < 0)
406 goto _error;
407 }
408
409 runtime->access = params_access(params);
410 runtime->format = params_format(params);
411 runtime->subformat = params_subformat(params);
412 runtime->channels = params_channels(params);
413 runtime->rate = params_rate(params);
414 runtime->period_size = params_period_size(params);
415 runtime->periods = params_periods(params);
416 runtime->buffer_size = params_buffer_size(params);
417 runtime->tick_time = params_tick_time(params);
418 runtime->info = params->info;
419 runtime->rate_num = params->rate_num;
420 runtime->rate_den = params->rate_den;
421
422 bits = snd_pcm_format_physical_width(runtime->format);
423 runtime->sample_bits = bits;
424 bits *= runtime->channels;
425 runtime->frame_bits = bits;
426 frames = 1;
427 while (bits % 8 != 0) {
428 bits *= 2;
429 frames *= 2;
430 }
431 runtime->byte_align = bits / 8;
432 runtime->min_align = frames;
433
434 /* Default sw params */
435 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
436 runtime->period_step = 1;
437 runtime->sleep_min = 0;
438 runtime->control->avail_min = runtime->period_size;
439 runtime->xfer_align = runtime->period_size;
440 runtime->start_threshold = 1;
441 runtime->stop_threshold = runtime->buffer_size;
442 runtime->silence_threshold = 0;
443 runtime->silence_size = 0;
444 runtime->boundary = runtime->buffer_size;
445 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
446 runtime->boundary *= 2;
447
448 snd_pcm_timer_resolution_change(substream);
449 runtime->status->state = SNDRV_PCM_STATE_SETUP;
9442e691
TI		 450
451 remove_acceptable_latency(substream->latency_id);
452 if ((usecs = period_to_usecs(runtime)) >= 0)
453 set_acceptable_latency(substream->latency_id, usecs);
1da177e4
LT		 454 return 0;
455 _error:
456 /* hardware might be unuseable from this time,
457 so we force application to retry to set
458 the correct hardware parameter settings */
459 runtime->status->state = SNDRV_PCM_STATE_OPEN;
460 if (substream->ops->hw_free != NULL)
461 substream->ops->hw_free(substream);
462 return err;
463}
464
877211f5
TI		 465static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
466 struct snd_pcm_hw_params __user * _params)
1da177e4 467{
877211f5 468 struct snd_pcm_hw_params *params;
1da177e4
LT		 469 int err;
470
471 params = kmalloc(sizeof(*params), GFP_KERNEL);
472 if (!params) {
473 err = -ENOMEM;
474 goto out;
475 }
476 if (copy_from_user(params, _params, sizeof(*params))) {
477 err = -EFAULT;
478 goto out;
479 }
480 err = snd_pcm_hw_params(substream, params);
481 if (copy_to_user(_params, params, sizeof(*params))) {
482 if (!err)
483 err = -EFAULT;
484 }
485out:
486 kfree(params);
487 return err;
488}
489
877211f5 490static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 491{
877211f5 492 struct snd_pcm_runtime *runtime;
1da177e4
LT		 493 int result = 0;
494
495 snd_assert(substream != NULL, return -ENXIO);
496 runtime = substream->runtime;
497 snd_assert(runtime != NULL, return -ENXIO);
498 snd_pcm_stream_lock_irq(substream);
499 switch (runtime->status->state) {
500 case SNDRV_PCM_STATE_SETUP:
501 case SNDRV_PCM_STATE_PREPARED:
502 break;
503 default:
504 snd_pcm_stream_unlock_irq(substream);
505 return -EBADFD;
506 }
507 snd_pcm_stream_unlock_irq(substream);
9c323fcb 508 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 509 return -EBADFD;
510 if (substream->ops->hw_free)
511 result = substream->ops->hw_free(substream);
512 runtime->status->state = SNDRV_PCM_STATE_OPEN;
9442e691 513 remove_acceptable_latency(substream->latency_id);
1da177e4
LT		 514 return result;
515}
516
877211f5
TI		 517static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
518 struct snd_pcm_sw_params *params)
1da177e4 519{
877211f5 520 struct snd_pcm_runtime *runtime;
1da177e4
LT		 521
522 snd_assert(substream != NULL, return -ENXIO);
523 runtime = substream->runtime;
524 snd_assert(runtime != NULL, return -ENXIO);
525 snd_pcm_stream_lock_irq(substream);
526 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
527 snd_pcm_stream_unlock_irq(substream);
528 return -EBADFD;
529 }
530 snd_pcm_stream_unlock_irq(substream);
531
532 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
533 return -EINVAL;
534 if (params->avail_min == 0)
535 return -EINVAL;
536 if (params->xfer_align == 0 ||
537 params->xfer_align % runtime->min_align != 0)
538 return -EINVAL;
539 if (params->silence_size >= runtime->boundary) {
540 if (params->silence_threshold != 0)
541 return -EINVAL;
542 } else {
543 if (params->silence_size > params->silence_threshold)
544 return -EINVAL;
545 if (params->silence_threshold > runtime->buffer_size)
546 return -EINVAL;
547 }
548 snd_pcm_stream_lock_irq(substream);
549 runtime->tstamp_mode = params->tstamp_mode;
550 runtime->sleep_min = params->sleep_min;
551 runtime->period_step = params->period_step;
552 runtime->control->avail_min = params->avail_min;
553 runtime->start_threshold = params->start_threshold;
554 runtime->stop_threshold = params->stop_threshold;
555 runtime->silence_threshold = params->silence_threshold;
556 runtime->silence_size = params->silence_size;
557 runtime->xfer_align = params->xfer_align;
558 params->boundary = runtime->boundary;
559 if (snd_pcm_running(substream)) {
560 if (runtime->sleep_min)
561 snd_pcm_tick_prepare(substream);
562 else
563 snd_pcm_tick_set(substream, 0);
564 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
565 runtime->silence_size > 0)
566 snd_pcm_playback_silence(substream, ULONG_MAX);
567 wake_up(&runtime->sleep);
568 }
569 snd_pcm_stream_unlock_irq(substream);
570 return 0;
571}
572
877211f5
TI		 573static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
574 struct snd_pcm_sw_params __user * _params)
1da177e4 575{
877211f5 576 struct snd_pcm_sw_params params;
1da177e4
LT		 577 int err;
578 if (copy_from_user(&params, _params, sizeof(params)))
579 return -EFAULT;
580 err = snd_pcm_sw_params(substream, &params);
581 if (copy_to_user(_params, &params, sizeof(params)))
582 return -EFAULT;
583 return err;
584}
585
877211f5
TI		 586int snd_pcm_status(struct snd_pcm_substream *substream,
587 struct snd_pcm_status *status)
1da177e4 588{
877211f5 589 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 590
591 snd_pcm_stream_lock_irq(substream);
592 status->state = runtime->status->state;
593 status->suspended_state = runtime->status->suspended_state;
594 if (status->state == SNDRV_PCM_STATE_OPEN)
595 goto _end;
596 status->trigger_tstamp = runtime->trigger_tstamp;
597 if (snd_pcm_running(substream)) {
598 snd_pcm_update_hw_ptr(substream);
599 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
600 status->tstamp = runtime->status->tstamp;
601 else
07799e75 602 getnstimeofday(&status->tstamp);
1da177e4 603 } else
07799e75 604 getnstimeofday(&status->tstamp);
1da177e4
LT		 605 status->appl_ptr = runtime->control->appl_ptr;
606 status->hw_ptr = runtime->status->hw_ptr;
607 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
608 status->avail = snd_pcm_playback_avail(runtime);
609 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
610 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
611 status->delay = runtime->buffer_size - status->avail;
612 else
613 status->delay = 0;
614 } else {
615 status->avail = snd_pcm_capture_avail(runtime);
616 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
617 status->delay = status->avail;
618 else
619 status->delay = 0;
620 }
621 status->avail_max = runtime->avail_max;
622 status->overrange = runtime->overrange;
623 runtime->avail_max = 0;
624 runtime->overrange = 0;
625 _end:
626 snd_pcm_stream_unlock_irq(substream);
627 return 0;
628}
629
877211f5
TI		 630static int snd_pcm_status_user(struct snd_pcm_substream *substream,
631 struct snd_pcm_status __user * _status)
1da177e4 632{
877211f5
TI		 633 struct snd_pcm_status status;
634 struct snd_pcm_runtime *runtime;
1da177e4
LT		 635 int res;
636
637 snd_assert(substream != NULL, return -ENXIO);
638 runtime = substream->runtime;
639 memset(&status, 0, sizeof(status));
640 res = snd_pcm_status(substream, &status);
641 if (res < 0)
642 return res;
643 if (copy_to_user(_status, &status, sizeof(status)))
644 return -EFAULT;
645 return 0;
646}
647
877211f5
TI		 648static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
649 struct snd_pcm_channel_info * info)
1da177e4 650{
877211f5 651 struct snd_pcm_runtime *runtime;
1da177e4
LT		 652 unsigned int channel;
653
654 snd_assert(substream != NULL, return -ENXIO);
655 channel = info->channel;
656 runtime = substream->runtime;
657 snd_pcm_stream_lock_irq(substream);
658 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
659 snd_pcm_stream_unlock_irq(substream);
660 return -EBADFD;
661 }
662 snd_pcm_stream_unlock_irq(substream);
663 if (channel >= runtime->channels)
664 return -EINVAL;
665 memset(info, 0, sizeof(*info));
666 info->channel = channel;
667 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
668}
669
877211f5
TI		 670static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
671 struct snd_pcm_channel_info __user * _info)
1da177e4 672{
877211f5 673 struct snd_pcm_channel_info info;
1da177e4
LT		 674 int res;
675
676 if (copy_from_user(&info, _info, sizeof(info)))
677 return -EFAULT;
678 res = snd_pcm_channel_info(substream, &info);
679 if (res < 0)
680 return res;
681 if (copy_to_user(_info, &info, sizeof(info)))
682 return -EFAULT;
683 return 0;
684}
685
877211f5 686static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 687{
877211f5 688 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 689 if (runtime->trigger_master == NULL)
690 return;
691 if (runtime->trigger_master == substream) {
07799e75 692 getnstimeofday(&runtime->trigger_tstamp);
1da177e4
LT		 693 } else {
694 snd_pcm_trigger_tstamp(runtime->trigger_master);
695 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
696 }
697 runtime->trigger_master = NULL;
698}
699
700struct action_ops {
877211f5
TI		 701 int (*pre_action)(struct snd_pcm_substream *substream, int state);
702 int (*do_action)(struct snd_pcm_substream *substream, int state);
703 void (*undo_action)(struct snd_pcm_substream *substream, int state);
704 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 705};
706
707/*
708 * this functions is core for handling of linked stream
709 * Note: the stream state might be changed also on failure
710 * Note2: call with calling stream lock + link lock
711 */
712static int snd_pcm_action_group(struct action_ops *ops,
877211f5 713 struct snd_pcm_substream *substream,
1da177e4
LT		 714 int state, int do_lock)
715{
716 struct list_head *pos;
877211f5
TI		 717 struct snd_pcm_substream *s = NULL;
718 struct snd_pcm_substream *s1;
1da177e4
LT		 719 int res = 0;
720
721 snd_pcm_group_for_each(pos, substream) {
722 s = snd_pcm_group_substream_entry(pos);
723 if (do_lock && s != substream)
724 spin_lock(&s->self_group.lock);
725 res = ops->pre_action(s, state);
726 if (res < 0)
727 goto _unlock;
728 }
729 snd_pcm_group_for_each(pos, substream) {
730 s = snd_pcm_group_substream_entry(pos);
731 res = ops->do_action(s, state);
732 if (res < 0) {
733 if (ops->undo_action) {
734 snd_pcm_group_for_each(pos, substream) {
735 s1 = snd_pcm_group_substream_entry(pos);
736 if (s1 == s) /* failed stream */
737 break;
738 ops->undo_action(s1, state);
739 }
740 }
741 s = NULL; /* unlock all */
742 goto _unlock;
743 }
744 }
745 snd_pcm_group_for_each(pos, substream) {
746 s = snd_pcm_group_substream_entry(pos);
747 ops->post_action(s, state);
748 }
749 _unlock:
750 if (do_lock) {
751 /* unlock streams */
752 snd_pcm_group_for_each(pos, substream) {
753 s1 = snd_pcm_group_substream_entry(pos);
754 if (s1 != substream)
755 spin_unlock(&s1->self_group.lock);
756 if (s1 == s) /* end */
757 break;
758 }
759 }
760 return res;
761}
762
763/*
764 * Note: call with stream lock
765 */
766static int snd_pcm_action_single(struct action_ops *ops,
877211f5 767 struct snd_pcm_substream *substream,
1da177e4
LT		 768 int state)
769{
770 int res;
771
772 res = ops->pre_action(substream, state);
773 if (res < 0)
774 return res;
775 res = ops->do_action(substream, state);
776 if (res == 0)
777 ops->post_action(substream, state);
778 else if (ops->undo_action)
779 ops->undo_action(substream, state);
780 return res;
781}
782
783/*
784 * Note: call with stream lock
785 */
786static int snd_pcm_action(struct action_ops *ops,
877211f5 787 struct snd_pcm_substream *substream,
1da177e4
LT		 788 int state)
789{
790 int res;
791
792 if (snd_pcm_stream_linked(substream)) {
793 if (!spin_trylock(&substream->group->lock)) {
794 spin_unlock(&substream->self_group.lock);
795 spin_lock(&substream->group->lock);
796 spin_lock(&substream->self_group.lock);
797 }
798 res = snd_pcm_action_group(ops, substream, state, 1);
799 spin_unlock(&substream->group->lock);
800 } else {
801 res = snd_pcm_action_single(ops, substream, state);
802 }
803 return res;
804}
805
806/*
807 * Note: don't use any locks before
808 */
809static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 810 struct snd_pcm_substream *substream,
1da177e4
LT		 811 int state)
812{
813 int res;
814
815 read_lock_irq(&snd_pcm_link_rwlock);
816 if (snd_pcm_stream_linked(substream)) {
817 spin_lock(&substream->group->lock);
818 spin_lock(&substream->self_group.lock);
819 res = snd_pcm_action_group(ops, substream, state, 1);
820 spin_unlock(&substream->self_group.lock);
821 spin_unlock(&substream->group->lock);
822 } else {
823 spin_lock(&substream->self_group.lock);
824 res = snd_pcm_action_single(ops, substream, state);
825 spin_unlock(&substream->self_group.lock);
826 }
827 read_unlock_irq(&snd_pcm_link_rwlock);
828 return res;
829}
830
831/*
832 */
833static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 834 struct snd_pcm_substream *substream,
1da177e4
LT		 835 int state)
836{
837 int res;
838
839 down_read(&snd_pcm_link_rwsem);
840 if (snd_pcm_stream_linked(substream))
841 res = snd_pcm_action_group(ops, substream, state, 0);
842 else
843 res = snd_pcm_action_single(ops, substream, state);
844 up_read(&snd_pcm_link_rwsem);
845 return res;
846}
847
848/*
849 * start callbacks
850 */
877211f5 851static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 852{
877211f5 853 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 854 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
855 return -EBADFD;
856 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
857 !snd_pcm_playback_data(substream))
858 return -EPIPE;
859 runtime->trigger_master = substream;
860 return 0;
861}
862
877211f5 863static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 864{
865 if (substream->runtime->trigger_master != substream)
866 return 0;
867 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
868}
869
877211f5 870static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 871{
872 if (substream->runtime->trigger_master == substream)
873 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
874}
875
877211f5 876static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 877{
877211f5 878 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 879 snd_pcm_trigger_tstamp(substream);
880 runtime->status->state = state;
881 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
882 runtime->silence_size > 0)
883 snd_pcm_playback_silence(substream, ULONG_MAX);
884 if (runtime->sleep_min)
885 snd_pcm_tick_prepare(substream);
886 if (substream->timer)
877211f5
TI		 887 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
888 &runtime->trigger_tstamp);
1da177e4
LT		 889}
890
891static struct action_ops snd_pcm_action_start = {
892 .pre_action = snd_pcm_pre_start,
893 .do_action = snd_pcm_do_start,
894 .undo_action = snd_pcm_undo_start,
895 .post_action = snd_pcm_post_start
896};
897
898/**
899 * snd_pcm_start
df8db936 900 * @substream: the PCM substream instance
1da177e4
LT		 901 *
902 * Start all linked streams.
903 */
877211f5 904int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 905{
877211f5
TI		 906 return snd_pcm_action(&snd_pcm_action_start, substream,
907 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 908}
909
910/*
911 * stop callbacks
912 */
877211f5 913static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 914{
877211f5 915 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 916 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
917 return -EBADFD;
918 runtime->trigger_master = substream;
919 return 0;
920}
921
877211f5 922static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 923{
924 if (substream->runtime->trigger_master == substream &&
925 snd_pcm_running(substream))
926 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
927 return 0; /* unconditonally stop all substreams */
928}
929
877211f5 930static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 931{
877211f5 932 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 933 if (runtime->status->state != state) {
934 snd_pcm_trigger_tstamp(substream);
935 if (substream->timer)
877211f5
TI		 936 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
937 &runtime->trigger_tstamp);
1da177e4
LT		 938 runtime->status->state = state;
939 snd_pcm_tick_set(substream, 0);
940 }
941 wake_up(&runtime->sleep);
942}
943
944static struct action_ops snd_pcm_action_stop = {
945 .pre_action = snd_pcm_pre_stop,
946 .do_action = snd_pcm_do_stop,
947 .post_action = snd_pcm_post_stop
948};
949
950/**
951 * snd_pcm_stop
df8db936
TI		 952 * @substream: the PCM substream instance
953 * @state: PCM state after stopping the stream
1da177e4
LT		 954 *
955 * Try to stop all running streams in the substream group.
956 * The state of each stream is changed to the given value after that unconditionally.
957 */
877211f5 958int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 959{
960 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
961}
962
e88e8ae6
TI		 963EXPORT_SYMBOL(snd_pcm_stop);
964
1da177e4
LT		 965/**
966 * snd_pcm_drain_done
df8db936 967 * @substream: the PCM substream
1da177e4
LT		 968 *
969 * Stop the DMA only when the given stream is playback.
970 * The state is changed to SETUP.
971 * Unlike snd_pcm_stop(), this affects only the given stream.
972 */
877211f5 973int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 974{
877211f5
TI		 975 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
976 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 977}
978
979/*
980 * pause callbacks
981 */
877211f5 982static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 983{
877211f5 984 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 985 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
986 return -ENOSYS;
987 if (push) {
988 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
989 return -EBADFD;
990 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
991 return -EBADFD;
992 runtime->trigger_master = substream;
993 return 0;
994}
995
877211f5 996static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 997{
998 if (substream->runtime->trigger_master != substream)
999 return 0;
1000 return substream->ops->trigger(substream,
1001 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1002 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1003}
1004
877211f5 1005static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1006{
1007 if (substream->runtime->trigger_master == substream)
1008 substream->ops->trigger(substream,
1009 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1010 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1011}
1012
877211f5 1013static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1014{
877211f5 1015 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1016 snd_pcm_trigger_tstamp(substream);
1017 if (push) {
1018 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1019 if (substream->timer)
877211f5
TI		 1020 snd_timer_notify(substream->timer,
1021 SNDRV_TIMER_EVENT_MPAUSE,
1022 &runtime->trigger_tstamp);
1da177e4
LT		 1023 snd_pcm_tick_set(substream, 0);
1024 wake_up(&runtime->sleep);
1025 } else {
1026 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1027 if (runtime->sleep_min)
1028 snd_pcm_tick_prepare(substream);
1029 if (substream->timer)
877211f5
TI		 1030 snd_timer_notify(substream->timer,
1031 SNDRV_TIMER_EVENT_MCONTINUE,
1032 &runtime->trigger_tstamp);
1da177e4
LT		 1033 }
1034}
1035
1036static struct action_ops snd_pcm_action_pause = {
1037 .pre_action = snd_pcm_pre_pause,
1038 .do_action = snd_pcm_do_pause,
1039 .undo_action = snd_pcm_undo_pause,
1040 .post_action = snd_pcm_post_pause
1041};
1042
1043/*
1044 * Push/release the pause for all linked streams.
1045 */
877211f5 1046static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1047{
1048 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1049}
1050
1051#ifdef CONFIG_PM
1052/* suspend */
1053
877211f5 1054static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1055{
877211f5 1056 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1057 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1058 return -EBUSY;
1059 runtime->trigger_master = substream;
1060 return 0;
1061}
1062
877211f5 1063static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1064{
877211f5 1065 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1066 if (runtime->trigger_master != substream)
1067 return 0;
1068 if (! snd_pcm_running(substream))
1069 return 0;
1070 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1071 return 0; /* suspend unconditionally */
1072}
1073
877211f5 1074static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1075{
877211f5 1076 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1077 snd_pcm_trigger_tstamp(substream);
1078 if (substream->timer)
877211f5
TI		 1079 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1080 &runtime->trigger_tstamp);
1da177e4
LT		 1081 runtime->status->suspended_state = runtime->status->state;
1082 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1083 snd_pcm_tick_set(substream, 0);
1084 wake_up(&runtime->sleep);
1085}
1086
1087static struct action_ops snd_pcm_action_suspend = {
1088 .pre_action = snd_pcm_pre_suspend,
1089 .do_action = snd_pcm_do_suspend,
1090 .post_action = snd_pcm_post_suspend
1091};
1092
1093/**
1094 * snd_pcm_suspend
df8db936 1095 * @substream: the PCM substream
1da177e4
LT		 1096 *
1097 * Trigger SUSPEND to all linked streams.
1098 * After this call, all streams are changed to SUSPENDED state.
1099 */
877211f5 1100int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1101{
1102 int err;
1103 unsigned long flags;
1104
603bf524
TI		 1105 if (! substream)
1106 return 0;
1107
1da177e4
LT		 1108 snd_pcm_stream_lock_irqsave(substream, flags);
1109 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1110 snd_pcm_stream_unlock_irqrestore(substream, flags);
1111 return err;
1112}
1113
e88e8ae6
TI		 1114EXPORT_SYMBOL(snd_pcm_suspend);
1115
1da177e4
LT		 1116/**
1117 * snd_pcm_suspend_all
df8db936 1118 * @pcm: the PCM instance
1da177e4
LT		 1119 *
1120 * Trigger SUSPEND to all substreams in the given pcm.
1121 * After this call, all streams are changed to SUSPENDED state.
1122 */
877211f5 1123int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1124{
877211f5 1125 struct snd_pcm_substream *substream;
1da177e4
LT		 1126 int stream, err = 0;
1127
603bf524
TI		 1128 if (! pcm)
1129 return 0;
1130
1da177e4 1131 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1132 for (substream = pcm->streams[stream].substream;
1133 substream; substream = substream->next) {
1da177e4
LT		 1134 /* FIXME: the open/close code should lock this as well */
1135 if (substream->runtime == NULL)
1136 continue;
1137 err = snd_pcm_suspend(substream);
1138 if (err < 0 && err != -EBUSY)
1139 return err;
1140 }
1141 }
1142 return 0;
1143}
1144
e88e8ae6
TI		 1145EXPORT_SYMBOL(snd_pcm_suspend_all);
1146
1da177e4
LT		 1147/* resume */
1148
877211f5 1149static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1150{
877211f5 1151 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1152 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1153 return -ENOSYS;
1154 runtime->trigger_master = substream;
1155 return 0;
1156}
1157
877211f5 1158static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1159{
877211f5 1160 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1161 if (runtime->trigger_master != substream)
1162 return 0;
1163 /* DMA not running previously? */
1164 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1165 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1166 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1167 return 0;
1168 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1169}
1170
877211f5 1171static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1172{
1173 if (substream->runtime->trigger_master == substream &&
1174 snd_pcm_running(substream))
1175 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1176}
1177
877211f5 1178static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1179{
877211f5 1180 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1181 snd_pcm_trigger_tstamp(substream);
1182 if (substream->timer)
877211f5
TI		 1183 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1184 &runtime->trigger_tstamp);
1da177e4
LT		 1185 runtime->status->state = runtime->status->suspended_state;
1186 if (runtime->sleep_min)
1187 snd_pcm_tick_prepare(substream);
1188}
1189
1190static struct action_ops snd_pcm_action_resume = {
1191 .pre_action = snd_pcm_pre_resume,
1192 .do_action = snd_pcm_do_resume,
1193 .undo_action = snd_pcm_undo_resume,
1194 .post_action = snd_pcm_post_resume
1195};
1196
877211f5 1197static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1198{
877211f5 1199 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1200 int res;
1201
1202 snd_power_lock(card);
cbac4b0c 1203 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1204 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1205 snd_power_unlock(card);
1206 return res;
1207}
1208
1209#else
1210
877211f5 1211static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1212{
1213 return -ENOSYS;
1214}
1215
1216#endif /* CONFIG_PM */
1217
1218/*
1219 * xrun ioctl
1220 *
1221 * Change the RUNNING stream(s) to XRUN state.
1222 */
877211f5 1223static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1224{
877211f5
TI		 1225 struct snd_card *card = substream->pcm->card;
1226 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1227 int result;
1228
1229 snd_power_lock(card);
1230 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1231 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1232 if (result < 0)
1233 goto _unlock;
1234 }
1235
1236 snd_pcm_stream_lock_irq(substream);
1237 switch (runtime->status->state) {
1238 case SNDRV_PCM_STATE_XRUN:
1239 result = 0; /* already there */
1240 break;
1241 case SNDRV_PCM_STATE_RUNNING:
1242 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1243 break;
1244 default:
1245 result = -EBADFD;
1246 }
1247 snd_pcm_stream_unlock_irq(substream);
1248 _unlock:
1249 snd_power_unlock(card);
1250 return result;
1251}
1252
1253/*
1254 * reset ioctl
1255 */
877211f5 1256static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1257{
877211f5 1258 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1259 switch (runtime->status->state) {
1260 case SNDRV_PCM_STATE_RUNNING:
1261 case SNDRV_PCM_STATE_PREPARED:
1262 case SNDRV_PCM_STATE_PAUSED:
1263 case SNDRV_PCM_STATE_SUSPENDED:
1264 return 0;
1265 default:
1266 return -EBADFD;
1267 }
1268}
1269
877211f5 1270static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1271{
877211f5 1272 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1273 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1274 if (err < 0)
1275 return err;
1276 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1277 runtime->hw_ptr_base = 0;
877211f5
TI		 1278 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1279 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1280 runtime->silence_start = runtime->status->hw_ptr;
1281 runtime->silence_filled = 0;
1282 return 0;
1283}
1284
877211f5 1285static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1286{
877211f5 1287 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1288 runtime->control->appl_ptr = runtime->status->hw_ptr;
1289 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1290 runtime->silence_size > 0)
1291 snd_pcm_playback_silence(substream, ULONG_MAX);
1292}
1293
1294static struct action_ops snd_pcm_action_reset = {
1295 .pre_action = snd_pcm_pre_reset,
1296 .do_action = snd_pcm_do_reset,
1297 .post_action = snd_pcm_post_reset
1298};
1299
877211f5 1300static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1301{
1302 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1303}
1304
1305/*
1306 * prepare ioctl
1307 */
0df63e44
TI		 1308/* we use the second argument for updating f_flags */
1309static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1310 int f_flags)
1da177e4 1311{
877211f5 1312 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1313 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1314 return -EBADFD;
1315 if (snd_pcm_running(substream))
1316 return -EBUSY;
0df63e44 1317 substream->f_flags = f_flags;
1da177e4
LT		 1318 return 0;
1319}
1320
877211f5 1321static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1322{
1323 int err;
1324 err = substream->ops->prepare(substream);
1325 if (err < 0)
1326 return err;
1327 return snd_pcm_do_reset(substream, 0);
1328}
1329
877211f5 1330static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1331{
877211f5 1332 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1333 runtime->control->appl_ptr = runtime->status->hw_ptr;
1334 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1335}
1336
1337static struct action_ops snd_pcm_action_prepare = {
1338 .pre_action = snd_pcm_pre_prepare,
1339 .do_action = snd_pcm_do_prepare,
1340 .post_action = snd_pcm_post_prepare
1341};
1342
1343/**
1344 * snd_pcm_prepare
df8db936 1345 * @substream: the PCM substream instance
0df63e44 1346 * @file: file to refer f_flags
df8db936
TI		 1347 *
1348 * Prepare the PCM substream to be triggerable.
1da177e4 1349 */
0df63e44
TI		 1350static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1351 struct file *file)
1da177e4
LT		 1352{
1353 int res;
877211f5 1354 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1355 int f_flags;
1356
1357 if (file)
1358 f_flags = file->f_flags;
1359 else
1360 f_flags = substream->f_flags;
1da177e4
LT		 1361
1362 snd_power_lock(card);
cbac4b0c 1363 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1364 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1365 substream, f_flags);
1da177e4
LT		 1366 snd_power_unlock(card);
1367 return res;
1368}
1369
1370/*
1371 * drain ioctl
1372 */
1373
877211f5 1374static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1375{
0df63e44 1376 if (substream->f_flags & O_NONBLOCK)
1da177e4
LT		 1377 return -EAGAIN;
1378 substream->runtime->trigger_master = substream;
1379 return 0;
1380}
1381
877211f5 1382static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1383{
877211f5 1384 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1386 switch (runtime->status->state) {
1387 case SNDRV_PCM_STATE_PREPARED:
1388 /* start playback stream if possible */
1389 if (! snd_pcm_playback_empty(substream)) {
1390 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1391 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1392 }
1393 break;
1394 case SNDRV_PCM_STATE_RUNNING:
1395 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1396 break;
1397 default:
1398 break;
1399 }
1400 } else {
1401 /* stop running stream */
1402 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1403 int state = snd_pcm_capture_avail(runtime) > 0 ?
1404 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1405 snd_pcm_do_stop(substream, state);
1406 snd_pcm_post_stop(substream, state);
1407 }
1408 }
1409 return 0;
1410}
1411
877211f5 1412static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1413{
1414}
1415
1416static struct action_ops snd_pcm_action_drain_init = {
1417 .pre_action = snd_pcm_pre_drain_init,
1418 .do_action = snd_pcm_do_drain_init,
1419 .post_action = snd_pcm_post_drain_init
1420};
1421
1422struct drain_rec {
877211f5 1423 struct snd_pcm_substream *substream;
1da177e4
LT		 1424 wait_queue_t wait;
1425 snd_pcm_uframes_t stop_threshold;
1426};
1427
877211f5 1428static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1429
1430/*
1431 * Drain the stream(s).
1432 * When the substream is linked, sync until the draining of all playback streams
1433 * is finished.
1434 * After this call, all streams are supposed to be either SETUP or DRAINING
1435 * (capture only) state.
1436 */
877211f5 1437static int snd_pcm_drain(struct snd_pcm_substream *substream)
1da177e4 1438{
877211f5
TI		 1439 struct snd_card *card;
1440 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1441 struct list_head *pos;
1442 int result = 0;
1443 int i, num_drecs;
1444 struct drain_rec *drec, drec_tmp, *d;
1445
1446 snd_assert(substream != NULL, return -ENXIO);
1447 card = substream->pcm->card;
1448 runtime = substream->runtime;
1449
1450 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1451 return -EBADFD;
1452
1da177e4
LT		 1453 snd_power_lock(card);
1454 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1455 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1456 if (result < 0) {
1457 snd_power_unlock(card);
1458 return result;
1459 }
1da177e4
LT		 1460 }
1461
1462 /* allocate temporary record for drain sync */
21cb2a2e 1463 down_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1464 if (snd_pcm_stream_linked(substream)) {
1465 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1466 if (! drec) {
21cb2a2e
TI		 1467 up_read(&snd_pcm_link_rwsem);
1468 snd_power_unlock(card);
1469 return -ENOMEM;
1da177e4
LT		 1470 }
1471 } else
1472 drec = &drec_tmp;
1473
21cb2a2e 1474 /* count only playback streams */
1da177e4
LT		 1475 num_drecs = 0;
1476 snd_pcm_group_for_each(pos, substream) {
877211f5 1477 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1da177e4 1478 runtime = s->runtime;
1da177e4
LT		 1479 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1480 d = &drec[num_drecs++];
1481 d->substream = s;
1482 init_waitqueue_entry(&d->wait, current);
1483 add_wait_queue(&runtime->sleep, &d->wait);
1484 /* stop_threshold fixup to avoid endless loop when
1485 * stop_threshold > buffer_size
1486 */
1487 d->stop_threshold = runtime->stop_threshold;
1488 if (runtime->stop_threshold > runtime->buffer_size)
1489 runtime->stop_threshold = runtime->buffer_size;
1490 }
1491 }
21cb2a2e 1492 up_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1493
1494 snd_pcm_stream_lock_irq(substream);
1495 /* resume pause */
1496 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1497 snd_pcm_pause(substream, 0);
1498
1499 /* pre-start/stop - all running streams are changed to DRAINING state */
1500 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1501 if (result < 0) {
1502 snd_pcm_stream_unlock_irq(substream);
1503 goto _error;
1504 }
1da177e4
LT		 1505
1506 for (;;) {
1507 long tout;
1508 if (signal_pending(current)) {
1509 result = -ERESTARTSYS;
1510 break;
1511 }
21cb2a2e
TI		 1512 /* all finished? */
1513 for (i = 0; i < num_drecs; i++) {
1514 runtime = drec[i].substream->runtime;
1515 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1516 break;
1517 }
1518 if (i == num_drecs)
1519 break; /* yes, all drained */
1520
1da177e4
LT		 1521 set_current_state(TASK_INTERRUPTIBLE);
1522 snd_pcm_stream_unlock_irq(substream);
1523 snd_power_unlock(card);
1524 tout = schedule_timeout(10 * HZ);
1525 snd_power_lock(card);
1526 snd_pcm_stream_lock_irq(substream);
1527 if (tout == 0) {
1528 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1529 result = -ESTRPIPE;
1530 else {
1531 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1532 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1533 result = -EIO;
1534 }
1535 break;
1536 }
1da177e4 1537 }
21cb2a2e
TI		 1538
1539 snd_pcm_stream_unlock_irq(substream);
1540
1541 _error:
1da177e4
LT		 1542 for (i = 0; i < num_drecs; i++) {
1543 d = &drec[i];
1544 runtime = d->substream->runtime;
1545 remove_wait_queue(&runtime->sleep, &d->wait);
1546 runtime->stop_threshold = d->stop_threshold;
1547 }
1548
1da177e4
LT		 1549 if (drec != &drec_tmp)
1550 kfree(drec);
1da177e4 1551 snd_power_unlock(card);
1da177e4
LT		 1552
1553 return result;
1554}
1555
1556/*
1557 * drop ioctl
1558 *
1559 * Immediately put all linked substreams into SETUP state.
1560 */
877211f5 1561static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1562{
877211f5
TI		 1563 struct snd_pcm_runtime *runtime;
1564 struct snd_card *card;
1da177e4
LT		 1565 int result = 0;
1566
1567 snd_assert(substream != NULL, return -ENXIO);
1568 runtime = substream->runtime;
1569 card = substream->pcm->card;
1570
1571 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1572 return -EBADFD;
1573
1574 snd_power_lock(card);
1575 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1576 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1577 if (result < 0)
1578 goto _unlock;
1579 }
1580
1581 snd_pcm_stream_lock_irq(substream);
1582 /* resume pause */
1583 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1584 snd_pcm_pause(substream, 0);
1585
1586 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1587 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1588 snd_pcm_stream_unlock_irq(substream);
1589 _unlock:
1590 snd_power_unlock(card);
1591 return result;
1592}
1593
1594
1595/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1596static struct file *snd_pcm_file_fd(int fd)
1597{
1598 struct file *file;
1599 struct inode *inode;
f87135f5
CL		 1600 unsigned int minor;
1601
1da177e4
LT		 1602 file = fget(fd);
1603 if (!file)
1604 return NULL;
1605 inode = file->f_dentry->d_inode;
1606 if (!S_ISCHR(inode->i_mode) ||
1607 imajor(inode) != snd_major) {
1608 fput(file);
1609 return NULL;
1610 }
1611 minor = iminor(inode);
f87135f5
CL		 1612 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1613 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1614 fput(file);
1615 return NULL;
1616 }
1617 return file;
1618}
1619
1620/*
1621 * PCM link handling
1622 */
877211f5 1623static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1624{
1625 int res = 0;
1626 struct file *file;
877211f5
TI		 1627 struct snd_pcm_file *pcm_file;
1628 struct snd_pcm_substream *substream1;
1da177e4
LT		 1629
1630 file = snd_pcm_file_fd(fd);
1631 if (!file)
1632 return -EBADFD;
1633 pcm_file = file->private_data;
1634 substream1 = pcm_file->substream;
1635 down_write(&snd_pcm_link_rwsem);
1636 write_lock_irq(&snd_pcm_link_rwlock);
1637 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1638 substream->runtime->status->state != substream1->runtime->status->state) {
1639 res = -EBADFD;
1640 goto _end;
1641 }
1642 if (snd_pcm_stream_linked(substream1)) {
1643 res = -EALREADY;
1644 goto _end;
1645 }
1646 if (!snd_pcm_stream_linked(substream)) {
877211f5 1647 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1da177e4
LT		 1648 if (substream->group == NULL) {
1649 res = -ENOMEM;
1650 goto _end;
1651 }
1652 spin_lock_init(&substream->group->lock);
1653 INIT_LIST_HEAD(&substream->group->substreams);
1654 list_add_tail(&substream->link_list, &substream->group->substreams);
1655 substream->group->count = 1;
1656 }
1657 list_add_tail(&substream1->link_list, &substream->group->substreams);
1658 substream->group->count++;
1659 substream1->group = substream->group;
1660 _end:
1661 write_unlock_irq(&snd_pcm_link_rwlock);
1662 up_write(&snd_pcm_link_rwsem);
1663 fput(file);
1664 return res;
1665}
1666
877211f5 1667static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1668{
1669 substream->group = &substream->self_group;
1670 INIT_LIST_HEAD(&substream->self_group.substreams);
1671 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1672}
1673
877211f5 1674static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4
LT		 1675{
1676 struct list_head *pos;
1677 int res = 0;
1678
1679 down_write(&snd_pcm_link_rwsem);
1680 write_lock_irq(&snd_pcm_link_rwlock);
1681 if (!snd_pcm_stream_linked(substream)) {
1682 res = -EALREADY;
1683 goto _end;
1684 }
1685 list_del(&substream->link_list);
1686 substream->group->count--;
1687 if (substream->group->count == 1) { /* detach the last stream, too */
1688 snd_pcm_group_for_each(pos, substream) {
1689 relink_to_local(snd_pcm_group_substream_entry(pos));
1690 break;
1691 }
1692 kfree(substream->group);
1693 }
1694 relink_to_local(substream);
1695 _end:
1696 write_unlock_irq(&snd_pcm_link_rwlock);
1697 up_write(&snd_pcm_link_rwsem);
1698 return res;
1699}
1700
1701/*
1702 * hw configurator
1703 */
877211f5
TI		 1704static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1705 struct snd_pcm_hw_rule *rule)
1da177e4 1706{
877211f5 1707 struct snd_interval t;
1da177e4
LT		 1708 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1709 hw_param_interval_c(params, rule->deps[1]), &t);
1710 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1711}
1712
877211f5
TI		 1713static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1714 struct snd_pcm_hw_rule *rule)
1da177e4 1715{
877211f5 1716 struct snd_interval t;
1da177e4
LT		 1717 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1718 hw_param_interval_c(params, rule->deps[1]), &t);
1719 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1720}
1721
877211f5
TI		 1722static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1723 struct snd_pcm_hw_rule *rule)
1da177e4 1724{
877211f5 1725 struct snd_interval t;
1da177e4
LT		 1726 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1727 hw_param_interval_c(params, rule->deps[1]),
1728 (unsigned long) rule->private, &t);
1729 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1730}
1731
877211f5
TI		 1732static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1733 struct snd_pcm_hw_rule *rule)
1da177e4 1734{
877211f5 1735 struct snd_interval t;
1da177e4
LT		 1736 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1737 (unsigned long) rule->private,
1738 hw_param_interval_c(params, rule->deps[1]), &t);
1739 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1740}
1741
877211f5
TI		 1742static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1743 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1744{
1745 unsigned int k;
877211f5
TI		 1746 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1747 struct snd_mask m;
1748 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1749 snd_mask_any(&m);
1750 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1751 int bits;
1752 if (! snd_mask_test(mask, k))
1753 continue;
1754 bits = snd_pcm_format_physical_width(k);
1755 if (bits <= 0)
1756 continue; /* ignore invalid formats */
1757 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1758 snd_mask_reset(&m, k);
1759 }
1760 return snd_mask_refine(mask, &m);
1761}
1762
877211f5
TI		 1763static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1764 struct snd_pcm_hw_rule *rule)
1da177e4 1765{
877211f5 1766 struct snd_interval t;
1da177e4
LT		 1767 unsigned int k;
1768 t.min = UINT_MAX;
1769 t.max = 0;
1770 t.openmin = 0;
1771 t.openmax = 0;
1772 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1773 int bits;
1774 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1775 continue;
1776 bits = snd_pcm_format_physical_width(k);
1777 if (bits <= 0)
1778 continue; /* ignore invalid formats */
1779 if (t.min > (unsigned)bits)
1780 t.min = bits;
1781 if (t.max < (unsigned)bits)
1782 t.max = bits;
1783 }
1784 t.integer = 1;
1785 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1786}
1787
1788#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1789#error "Change this table"
1790#endif
1791
1792static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1793 48000, 64000, 88200, 96000, 176400, 192000 };
1794
877211f5
TI		 1795static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1796 struct snd_pcm_hw_rule *rule)
1da177e4 1797{
877211f5 1798 struct snd_pcm_hardware *hw = rule->private;
1da177e4
LT		 1799 return snd_interval_list(hw_param_interval(params, rule->var),
1800 ARRAY_SIZE(rates), rates, hw->rates);
1801}
1802
877211f5
TI		 1803static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1804 struct snd_pcm_hw_rule *rule)
1da177e4 1805{
877211f5
TI		 1806 struct snd_interval t;
1807 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1808 t.min = 0;
1809 t.max = substream->buffer_bytes_max;
1810 t.openmin = 0;
1811 t.openmax = 0;
1812 t.integer = 1;
1813 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1814}
1815
877211f5 1816int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1817{
877211f5
TI		 1818 struct snd_pcm_runtime *runtime = substream->runtime;
1819 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1820 int k, err;
1821
1822 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1823 snd_mask_any(constrs_mask(constrs, k));
1824 }
1825
1826 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1827 snd_interval_any(constrs_interval(constrs, k));
1828 }
1829
1830 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1831 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1832 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1833 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1834 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1835
1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1837 snd_pcm_hw_rule_format, NULL,
1838 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1839 if (err < 0)
1840 return err;
1841 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1842 snd_pcm_hw_rule_sample_bits, NULL,
1843 SNDRV_PCM_HW_PARAM_FORMAT,
1844 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1845 if (err < 0)
1846 return err;
1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1848 snd_pcm_hw_rule_div, NULL,
1849 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1850 if (err < 0)
1851 return err;
1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1853 snd_pcm_hw_rule_mul, NULL,
1854 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1855 if (err < 0)
1856 return err;
1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1858 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1859 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1860 if (err < 0)
1861 return err;
1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1863 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1864 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1865 if (err < 0)
1866 return err;
1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1868 snd_pcm_hw_rule_div, NULL,
1869 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1870 if (err < 0)
1871 return err;
1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1873 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1874 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1875 if (err < 0)
1876 return err;
1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1878 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1879 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1880 if (err < 0)
1881 return err;
1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1883 snd_pcm_hw_rule_div, NULL,
1884 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1885 if (err < 0)
1886 return err;
1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1888 snd_pcm_hw_rule_div, NULL,
1889 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1890 if (err < 0)
1891 return err;
1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1893 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1894 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1895 if (err < 0)
1896 return err;
1897 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1898 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1899 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1900 if (err < 0)
1901 return err;
1902 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1903 snd_pcm_hw_rule_mul, NULL,
1904 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1905 if (err < 0)
1906 return err;
1907 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1908 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1909 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1910 if (err < 0)
1911 return err;
1912 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1913 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1914 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1915 if (err < 0)
1916 return err;
1917 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1918 snd_pcm_hw_rule_muldivk, (void*) 8,
1919 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1920 if (err < 0)
1921 return err;
1922 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1923 snd_pcm_hw_rule_muldivk, (void*) 8,
1924 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1925 if (err < 0)
1926 return err;
1927 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1928 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1929 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1930 if (err < 0)
1931 return err;
1932 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1933 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1934 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1935 if (err < 0)
1936 return err;
1937 return 0;
1938}
1939
877211f5 1940int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1941{
877211f5
TI		 1942 struct snd_pcm_runtime *runtime = substream->runtime;
1943 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1944 int err;
1945 unsigned int mask = 0;
1946
1947 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1948 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1949 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1950 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1951 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1952 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1953 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1954 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1955 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1956 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1957 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1958 }
1959 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1960 snd_assert(err >= 0, return -EINVAL);
1961
1962 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1963 snd_assert(err >= 0, return -EINVAL);
1964
1965 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1966 snd_assert(err >= 0, return -EINVAL);
1967
1968 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1969 hw->channels_min, hw->channels_max);
1970 snd_assert(err >= 0, return -EINVAL);
1971
1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1973 hw->rate_min, hw->rate_max);
1974 snd_assert(err >= 0, return -EINVAL);
1975
1976 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1977 hw->period_bytes_min, hw->period_bytes_max);
1978 snd_assert(err >= 0, return -EINVAL);
1979
1980 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1981 hw->periods_min, hw->periods_max);
1982 snd_assert(err >= 0, return -EINVAL);
1983
1984 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1985 hw->period_bytes_min, hw->buffer_bytes_max);
1986 snd_assert(err >= 0, return -EINVAL);
1987
1988 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1989 snd_pcm_hw_rule_buffer_bytes_max, substream,
1990 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1991 if (err < 0)
1992 return err;
1993
1994 /* FIXME: remove */
1995 if (runtime->dma_bytes) {
1996 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1997 snd_assert(err >= 0, return -EINVAL);
1998 }
1999
2000 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2001 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2002 snd_pcm_hw_rule_rate, hw,
2003 SNDRV_PCM_HW_PARAM_RATE, -1);
2004 if (err < 0)
2005 return err;
2006 }
2007
2008 /* FIXME: this belong to lowlevel */
2009 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
2010 1000000 / HZ, 1000000 / HZ);
2011 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2012
2013 return 0;
2014}
2015
3bf75f9b 2016static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2017{
1da177e4 2018 snd_pcm_unlink(substream);
3bf75f9b
TI		 2019}
2020
2021void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2022{
0df63e44
TI		 2023 substream->ref_count--;
2024 if (substream->ref_count > 0)
2025 return;
2026
3bf75f9b 2027 snd_pcm_drop(substream);
3bf75f9b 2028 if (substream->hw_opened) {
1da177e4
LT		 2029 if (substream->ops->hw_free != NULL)
2030 substream->ops->hw_free(substream);
2031 substream->ops->close(substream);
3bf75f9b 2032 substream->hw_opened = 0;
1da177e4 2033 }
1576274d
TI		 2034 if (substream->pcm_release) {
2035 substream->pcm_release(substream);
2036 substream->pcm_release = NULL;
2037 }
3bf75f9b
TI		 2038 snd_pcm_detach_substream(substream);
2039}
2040
e88e8ae6
TI		 2041EXPORT_SYMBOL(snd_pcm_release_substream);
2042
3bf75f9b
TI		 2043int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2044 struct file *file,
2045 struct snd_pcm_substream **rsubstream)
2046{
2047 struct snd_pcm_substream *substream;
2048 int err;
2049
2050 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2051 if (err < 0)
2052 return err;
0df63e44
TI		 2053 if (substream->ref_count > 1) {
2054 *rsubstream = substream;
2055 return 0;
2056 }
2057
3bf75f9b
TI		 2058 err = snd_pcm_hw_constraints_init(substream);
2059 if (err < 0) {
2060 snd_printd("snd_pcm_hw_constraints_init failed\n");
2061 goto error;
2062 }
2063
2064 if ((err = substream->ops->open(substream)) < 0)
2065 goto error;
2066
2067 substream->hw_opened = 1;
2068
2069 err = snd_pcm_hw_constraints_complete(substream);
2070 if (err < 0) {
2071 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2072 goto error;
2073 }
2074
2075 *rsubstream = substream;
1da177e4 2076 return 0;
3bf75f9b
TI		 2077
2078 error:
2079 snd_pcm_release_substream(substream);
2080 return err;
1da177e4
LT		 2081}
2082
e88e8ae6
TI		 2083EXPORT_SYMBOL(snd_pcm_open_substream);
2084
1da177e4 2085static int snd_pcm_open_file(struct file *file,
877211f5 2086 struct snd_pcm *pcm,
1da177e4 2087 int stream,
877211f5 2088 struct snd_pcm_file **rpcm_file)
1da177e4 2089{
877211f5
TI		 2090 struct snd_pcm_file *pcm_file;
2091 struct snd_pcm_substream *substream;
2092 struct snd_pcm_str *str;
3bf75f9b 2093 int err;
1da177e4
LT		 2094
2095 snd_assert(rpcm_file != NULL, return -EINVAL);
2096 *rpcm_file = NULL;
2097
3bf75f9b
TI		 2098 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2099 if (err < 0)
2100 return err;
2101
548a648b
TI		 2102 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2103 if (pcm_file == NULL) {
2104 snd_pcm_release_substream(substream);
2105 return -ENOMEM;
2106 }
2107 pcm_file->substream = substream;
2108 if (substream->ref_count == 1) {
0df63e44
TI		 2109 str = substream->pstr;
2110 substream->file = pcm_file;
2111 substream->pcm_release = pcm_release_private;
1da177e4 2112 }
1da177e4
LT		 2113 file->private_data = pcm_file;
2114 *rpcm_file = pcm_file;
2115 return 0;
2116}
2117
f87135f5
CL		 2118static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2119{
2120 struct snd_pcm *pcm;
2121
2122 pcm = snd_lookup_minor_data(iminor(inode),
2123 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2124 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2125}
2126
2127static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2128{
877211f5 2129 struct snd_pcm *pcm;
f87135f5
CL		 2130
2131 pcm = snd_lookup_minor_data(iminor(inode),
2132 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2133 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2134}
2135
2136static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2137{
2138 int err;
877211f5 2139 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2140 wait_queue_t wait;
2141
1da177e4
LT		 2142 if (pcm == NULL) {
2143 err = -ENODEV;
2144 goto __error1;
2145 }
2146 err = snd_card_file_add(pcm->card, file);
2147 if (err < 0)
2148 goto __error1;
2149 if (!try_module_get(pcm->card->module)) {
2150 err = -EFAULT;
2151 goto __error2;
2152 }
2153 init_waitqueue_entry(&wait, current);
2154 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2155 mutex_lock(&pcm->open_mutex);
1da177e4 2156 while (1) {
f87135f5 2157 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
1da177e4
LT		 2158 if (err >= 0)
2159 break;
2160 if (err == -EAGAIN) {
2161 if (file->f_flags & O_NONBLOCK) {
2162 err = -EBUSY;
2163 break;
2164 }
2165 } else
2166 break;
2167 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2168 mutex_unlock(&pcm->open_mutex);
1da177e4 2169 schedule();
1a60d4c5 2170 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2171 if (signal_pending(current)) {
2172 err = -ERESTARTSYS;
2173 break;
2174 }
2175 }
2176 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2177 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2178 if (err < 0)
2179 goto __error;
2180 return err;
2181
2182 __error:
2183 module_put(pcm->card->module);
2184 __error2:
2185 snd_card_file_remove(pcm->card, file);
2186 __error1:
2187 return err;
2188}
2189
2190static int snd_pcm_release(struct inode *inode, struct file *file)
2191{
877211f5
TI		 2192 struct snd_pcm *pcm;
2193 struct snd_pcm_substream *substream;
2194 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2195
2196 pcm_file = file->private_data;
2197 substream = pcm_file->substream;
2198 snd_assert(substream != NULL, return -ENXIO);
1da177e4 2199 pcm = substream->pcm;
1da177e4 2200 fasync_helper(-1, file, 0, &substream->runtime->fasync);
1a60d4c5 2201 mutex_lock(&pcm->open_mutex);
3bf75f9b 2202 snd_pcm_release_substream(substream);
548a648b 2203 kfree(pcm_file);
1a60d4c5 2204 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2205 wake_up(&pcm->open_wait);
2206 module_put(pcm->card->module);
2207 snd_card_file_remove(pcm->card, file);
2208 return 0;
2209}
2210
877211f5
TI		 2211static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2212 snd_pcm_uframes_t frames)
1da177e4 2213{
877211f5 2214 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2215 snd_pcm_sframes_t appl_ptr;
2216 snd_pcm_sframes_t ret;
2217 snd_pcm_sframes_t hw_avail;
2218
2219 if (frames == 0)
2220 return 0;
2221
2222 snd_pcm_stream_lock_irq(substream);
2223 switch (runtime->status->state) {
2224 case SNDRV_PCM_STATE_PREPARED:
2225 break;
2226 case SNDRV_PCM_STATE_DRAINING:
2227 case SNDRV_PCM_STATE_RUNNING:
2228 if (snd_pcm_update_hw_ptr(substream) >= 0)
2229 break;
2230 /* Fall through */
2231 case SNDRV_PCM_STATE_XRUN:
2232 ret = -EPIPE;
2233 goto __end;
2234 default:
2235 ret = -EBADFD;
2236 goto __end;
2237 }
2238
2239 hw_avail = snd_pcm_playback_hw_avail(runtime);
2240 if (hw_avail <= 0) {
2241 ret = 0;
2242 goto __end;
2243 }
2244 if (frames > (snd_pcm_uframes_t)hw_avail)
2245 frames = hw_avail;
2246 else
2247 frames -= frames % runtime->xfer_align;
2248 appl_ptr = runtime->control->appl_ptr - frames;
2249 if (appl_ptr < 0)
2250 appl_ptr += runtime->boundary;
2251 runtime->control->appl_ptr = appl_ptr;
2252 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2253 runtime->sleep_min)
2254 snd_pcm_tick_prepare(substream);
2255 ret = frames;
2256 __end:
2257 snd_pcm_stream_unlock_irq(substream);
2258 return ret;
2259}
2260
877211f5
TI		 2261static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2262 snd_pcm_uframes_t frames)
1da177e4 2263{
877211f5 2264 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2265 snd_pcm_sframes_t appl_ptr;
2266 snd_pcm_sframes_t ret;
2267 snd_pcm_sframes_t hw_avail;
2268
2269 if (frames == 0)
2270 return 0;
2271
2272 snd_pcm_stream_lock_irq(substream);
2273 switch (runtime->status->state) {
2274 case SNDRV_PCM_STATE_PREPARED:
2275 case SNDRV_PCM_STATE_DRAINING:
2276 break;
2277 case SNDRV_PCM_STATE_RUNNING:
2278 if (snd_pcm_update_hw_ptr(substream) >= 0)
2279 break;
2280 /* Fall through */
2281 case SNDRV_PCM_STATE_XRUN:
2282 ret = -EPIPE;
2283 goto __end;
2284 default:
2285 ret = -EBADFD;
2286 goto __end;
2287 }
2288
2289 hw_avail = snd_pcm_capture_hw_avail(runtime);
2290 if (hw_avail <= 0) {
2291 ret = 0;
2292 goto __end;
2293 }
2294 if (frames > (snd_pcm_uframes_t)hw_avail)
2295 frames = hw_avail;
2296 else
2297 frames -= frames % runtime->xfer_align;
2298 appl_ptr = runtime->control->appl_ptr - frames;
2299 if (appl_ptr < 0)
2300 appl_ptr += runtime->boundary;
2301 runtime->control->appl_ptr = appl_ptr;
2302 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2303 runtime->sleep_min)
2304 snd_pcm_tick_prepare(substream);
2305 ret = frames;
2306 __end:
2307 snd_pcm_stream_unlock_irq(substream);
2308 return ret;
2309}
2310
877211f5
TI		 2311static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2312 snd_pcm_uframes_t frames)
1da177e4 2313{
877211f5 2314 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2315 snd_pcm_sframes_t appl_ptr;
2316 snd_pcm_sframes_t ret;
2317 snd_pcm_sframes_t avail;
2318
2319 if (frames == 0)
2320 return 0;
2321
2322 snd_pcm_stream_lock_irq(substream);
2323 switch (runtime->status->state) {
2324 case SNDRV_PCM_STATE_PREPARED:
2325 case SNDRV_PCM_STATE_PAUSED:
2326 break;
2327 case SNDRV_PCM_STATE_DRAINING:
2328 case SNDRV_PCM_STATE_RUNNING:
2329 if (snd_pcm_update_hw_ptr(substream) >= 0)
2330 break;
2331 /* Fall through */
2332 case SNDRV_PCM_STATE_XRUN:
2333 ret = -EPIPE;
2334 goto __end;
2335 default:
2336 ret = -EBADFD;
2337 goto __end;
2338 }
2339
2340 avail = snd_pcm_playback_avail(runtime);
2341 if (avail <= 0) {
2342 ret = 0;
2343 goto __end;
2344 }
2345 if (frames > (snd_pcm_uframes_t)avail)
2346 frames = avail;
2347 else
2348 frames -= frames % runtime->xfer_align;
2349 appl_ptr = runtime->control->appl_ptr + frames;
2350 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2351 appl_ptr -= runtime->boundary;
2352 runtime->control->appl_ptr = appl_ptr;
2353 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2354 runtime->sleep_min)
2355 snd_pcm_tick_prepare(substream);
2356 ret = frames;
2357 __end:
2358 snd_pcm_stream_unlock_irq(substream);
2359 return ret;
2360}
2361
877211f5
TI		 2362static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2363 snd_pcm_uframes_t frames)
1da177e4 2364{
877211f5 2365 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2366 snd_pcm_sframes_t appl_ptr;
2367 snd_pcm_sframes_t ret;
2368 snd_pcm_sframes_t avail;
2369
2370 if (frames == 0)
2371 return 0;
2372
2373 snd_pcm_stream_lock_irq(substream);
2374 switch (runtime->status->state) {
2375 case SNDRV_PCM_STATE_PREPARED:
2376 case SNDRV_PCM_STATE_DRAINING:
2377 case SNDRV_PCM_STATE_PAUSED:
2378 break;
2379 case SNDRV_PCM_STATE_RUNNING:
2380 if (snd_pcm_update_hw_ptr(substream) >= 0)
2381 break;
2382 /* Fall through */
2383 case SNDRV_PCM_STATE_XRUN:
2384 ret = -EPIPE;
2385 goto __end;
2386 default:
2387 ret = -EBADFD;
2388 goto __end;
2389 }
2390
2391 avail = snd_pcm_capture_avail(runtime);
2392 if (avail <= 0) {
2393 ret = 0;
2394 goto __end;
2395 }
2396 if (frames > (snd_pcm_uframes_t)avail)
2397 frames = avail;
2398 else
2399 frames -= frames % runtime->xfer_align;
2400 appl_ptr = runtime->control->appl_ptr + frames;
2401 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2402 appl_ptr -= runtime->boundary;
2403 runtime->control->appl_ptr = appl_ptr;
2404 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2405 runtime->sleep_min)
2406 snd_pcm_tick_prepare(substream);
2407 ret = frames;
2408 __end:
2409 snd_pcm_stream_unlock_irq(substream);
2410 return ret;
2411}
2412
877211f5 2413static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2414{
877211f5 2415 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2416 int err;
2417
2418 snd_pcm_stream_lock_irq(substream);
2419 switch (runtime->status->state) {
2420 case SNDRV_PCM_STATE_DRAINING:
2421 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2422 goto __badfd;
2423 case SNDRV_PCM_STATE_RUNNING:
2424 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2425 break;
2426 /* Fall through */
2427 case SNDRV_PCM_STATE_PREPARED:
2428 case SNDRV_PCM_STATE_SUSPENDED:
2429 err = 0;
2430 break;
2431 case SNDRV_PCM_STATE_XRUN:
2432 err = -EPIPE;
2433 break;
2434 default:
2435 __badfd:
2436 err = -EBADFD;
2437 break;
2438 }
2439 snd_pcm_stream_unlock_irq(substream);
2440 return err;
2441}
2442
877211f5
TI		 2443static int snd_pcm_delay(struct snd_pcm_substream *substream,
2444 snd_pcm_sframes_t __user *res)
1da177e4 2445{
877211f5 2446 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2447 int err;
2448 snd_pcm_sframes_t n = 0;
2449
2450 snd_pcm_stream_lock_irq(substream);
2451 switch (runtime->status->state) {
2452 case SNDRV_PCM_STATE_DRAINING:
2453 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2454 goto __badfd;
2455 case SNDRV_PCM_STATE_RUNNING:
2456 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2457 break;
2458 /* Fall through */
2459 case SNDRV_PCM_STATE_PREPARED:
2460 case SNDRV_PCM_STATE_SUSPENDED:
2461 err = 0;
2462 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2463 n = snd_pcm_playback_hw_avail(runtime);
2464 else
2465 n = snd_pcm_capture_avail(runtime);
2466 break;
2467 case SNDRV_PCM_STATE_XRUN:
2468 err = -EPIPE;
2469 break;
2470 default:
2471 __badfd:
2472 err = -EBADFD;
2473 break;
2474 }
2475 snd_pcm_stream_unlock_irq(substream);
2476 if (!err)
2477 if (put_user(n, res))
2478 err = -EFAULT;
2479 return err;
2480}
2481
877211f5
TI		 2482static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2483 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2484{
877211f5
TI		 2485 struct snd_pcm_runtime *runtime = substream->runtime;
2486 struct snd_pcm_sync_ptr sync_ptr;
2487 volatile struct snd_pcm_mmap_status *status;
2488 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2489 int err;
2490
2491 memset(&sync_ptr, 0, sizeof(sync_ptr));
2492 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2493 return -EFAULT;
877211f5 2494 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2495 return -EFAULT;
2496 status = runtime->status;
2497 control = runtime->control;
2498 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2499 err = snd_pcm_hwsync(substream);
2500 if (err < 0)
2501 return err;
2502 }
2503 snd_pcm_stream_lock_irq(substream);
2504 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2505 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2506 else
2507 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2508 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2509 control->avail_min = sync_ptr.c.control.avail_min;
2510 else
2511 sync_ptr.c.control.avail_min = control->avail_min;
2512 sync_ptr.s.status.state = status->state;
2513 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2514 sync_ptr.s.status.tstamp = status->tstamp;
2515 sync_ptr.s.status.suspended_state = status->suspended_state;
2516 snd_pcm_stream_unlock_irq(substream);
2517 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2518 return -EFAULT;
2519 return 0;
2520}
2521
0df63e44
TI		 2522static int snd_pcm_common_ioctl1(struct file *file,
2523 struct snd_pcm_substream *substream,
1da177e4
LT		 2524 unsigned int cmd, void __user *arg)
2525{
2526 snd_assert(substream != NULL, return -ENXIO);
2527
2528 switch (cmd) {
2529 case SNDRV_PCM_IOCTL_PVERSION:
2530 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2531 case SNDRV_PCM_IOCTL_INFO:
2532 return snd_pcm_info_user(substream, arg);
07799e75 2533 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
1da177e4 2534 return 0;
1da177e4
LT		 2535 case SNDRV_PCM_IOCTL_HW_REFINE:
2536 return snd_pcm_hw_refine_user(substream, arg);
2537 case SNDRV_PCM_IOCTL_HW_PARAMS:
2538 return snd_pcm_hw_params_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_HW_FREE:
2540 return snd_pcm_hw_free(substream);
2541 case SNDRV_PCM_IOCTL_SW_PARAMS:
2542 return snd_pcm_sw_params_user(substream, arg);
2543 case SNDRV_PCM_IOCTL_STATUS:
2544 return snd_pcm_status_user(substream, arg);
2545 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2546 return snd_pcm_channel_info_user(substream, arg);
2547 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2548 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2549 case SNDRV_PCM_IOCTL_RESET:
2550 return snd_pcm_reset(substream);
2551 case SNDRV_PCM_IOCTL_START:
2552 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2553 case SNDRV_PCM_IOCTL_LINK:
2554 return snd_pcm_link(substream, (int)(unsigned long) arg);
2555 case SNDRV_PCM_IOCTL_UNLINK:
2556 return snd_pcm_unlink(substream);
2557 case SNDRV_PCM_IOCTL_RESUME:
2558 return snd_pcm_resume(substream);
2559 case SNDRV_PCM_IOCTL_XRUN:
2560 return snd_pcm_xrun(substream);
2561 case SNDRV_PCM_IOCTL_HWSYNC:
2562 return snd_pcm_hwsync(substream);
2563 case SNDRV_PCM_IOCTL_DELAY:
2564 return snd_pcm_delay(substream, arg);
2565 case SNDRV_PCM_IOCTL_SYNC_PTR:
2566 return snd_pcm_sync_ptr(substream, arg);
59d48582 2567#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2568 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2569 return snd_pcm_hw_refine_old_user(substream, arg);
2570 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2571 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2572#endif
1da177e4
LT		 2573 case SNDRV_PCM_IOCTL_DRAIN:
2574 return snd_pcm_drain(substream);
2575 case SNDRV_PCM_IOCTL_DROP:
2576 return snd_pcm_drop(substream);
e661d0dd
TI		 2577 case SNDRV_PCM_IOCTL_PAUSE:
2578 {
2579 int res;
2580 snd_pcm_stream_lock_irq(substream);
2581 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2582 snd_pcm_stream_unlock_irq(substream);
2583 return res;
2584 }
1da177e4
LT		 2585 }
2586 snd_printd("unknown ioctl = 0x%x\n", cmd);
2587 return -ENOTTY;
2588}
2589
0df63e44
TI		 2590static int snd_pcm_playback_ioctl1(struct file *file,
2591 struct snd_pcm_substream *substream,
1da177e4
LT		 2592 unsigned int cmd, void __user *arg)
2593{
2594 snd_assert(substream != NULL, return -ENXIO);
2595 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2596 switch (cmd) {
2597 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2598 {
877211f5
TI		 2599 struct snd_xferi xferi;
2600 struct snd_xferi __user *_xferi = arg;
2601 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2602 snd_pcm_sframes_t result;
2603 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2604 return -EBADFD;
2605 if (put_user(0, &_xferi->result))
2606 return -EFAULT;
2607 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2608 return -EFAULT;
2609 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2610 __put_user(result, &_xferi->result);
2611 return result < 0 ? result : 0;
2612 }
2613 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2614 {
877211f5
TI		 2615 struct snd_xfern xfern;
2616 struct snd_xfern __user *_xfern = arg;
2617 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2618 void __user **bufs;
2619 snd_pcm_sframes_t result;
2620 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2621 return -EBADFD;
2622 if (runtime->channels > 128)
2623 return -EINVAL;
2624 if (put_user(0, &_xfern->result))
2625 return -EFAULT;
2626 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2627 return -EFAULT;
2628 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2629 if (bufs == NULL)
2630 return -ENOMEM;
2631 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2632 kfree(bufs);
2633 return -EFAULT;
2634 }
2635 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2636 kfree(bufs);
2637 __put_user(result, &_xfern->result);
2638 return result < 0 ? result : 0;
2639 }
2640 case SNDRV_PCM_IOCTL_REWIND:
2641 {
2642 snd_pcm_uframes_t frames;
2643 snd_pcm_uframes_t __user *_frames = arg;
2644 snd_pcm_sframes_t result;
2645 if (get_user(frames, _frames))
2646 return -EFAULT;
2647 if (put_user(0, _frames))
2648 return -EFAULT;
2649 result = snd_pcm_playback_rewind(substream, frames);
2650 __put_user(result, _frames);
2651 return result < 0 ? result : 0;
2652 }
2653 case SNDRV_PCM_IOCTL_FORWARD:
2654 {
2655 snd_pcm_uframes_t frames;
2656 snd_pcm_uframes_t __user *_frames = arg;
2657 snd_pcm_sframes_t result;
2658 if (get_user(frames, _frames))
2659 return -EFAULT;
2660 if (put_user(0, _frames))
2661 return -EFAULT;
2662 result = snd_pcm_playback_forward(substream, frames);
2663 __put_user(result, _frames);
2664 return result < 0 ? result : 0;
2665 }
1da177e4 2666 }
0df63e44 2667 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2668}
2669
0df63e44
TI		 2670static int snd_pcm_capture_ioctl1(struct file *file,
2671 struct snd_pcm_substream *substream,
1da177e4
LT		 2672 unsigned int cmd, void __user *arg)
2673{
2674 snd_assert(substream != NULL, return -ENXIO);
2675 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2676 switch (cmd) {
2677 case SNDRV_PCM_IOCTL_READI_FRAMES:
2678 {
877211f5
TI		 2679 struct snd_xferi xferi;
2680 struct snd_xferi __user *_xferi = arg;
2681 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2682 snd_pcm_sframes_t result;
2683 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2684 return -EBADFD;
2685 if (put_user(0, &_xferi->result))
2686 return -EFAULT;
2687 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2688 return -EFAULT;
2689 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2690 __put_user(result, &_xferi->result);
2691 return result < 0 ? result : 0;
2692 }
2693 case SNDRV_PCM_IOCTL_READN_FRAMES:
2694 {
877211f5
TI		 2695 struct snd_xfern xfern;
2696 struct snd_xfern __user *_xfern = arg;
2697 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2698 void *bufs;
2699 snd_pcm_sframes_t result;
2700 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2701 return -EBADFD;
2702 if (runtime->channels > 128)
2703 return -EINVAL;
2704 if (put_user(0, &_xfern->result))
2705 return -EFAULT;
2706 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2707 return -EFAULT;
2708 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2709 if (bufs == NULL)
2710 return -ENOMEM;
2711 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2712 kfree(bufs);
2713 return -EFAULT;
2714 }
2715 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2716 kfree(bufs);
2717 __put_user(result, &_xfern->result);
2718 return result < 0 ? result : 0;
2719 }
2720 case SNDRV_PCM_IOCTL_REWIND:
2721 {
2722 snd_pcm_uframes_t frames;
2723 snd_pcm_uframes_t __user *_frames = arg;
2724 snd_pcm_sframes_t result;
2725 if (get_user(frames, _frames))
2726 return -EFAULT;
2727 if (put_user(0, _frames))
2728 return -EFAULT;
2729 result = snd_pcm_capture_rewind(substream, frames);
2730 __put_user(result, _frames);
2731 return result < 0 ? result : 0;
2732 }
2733 case SNDRV_PCM_IOCTL_FORWARD:
2734 {
2735 snd_pcm_uframes_t frames;
2736 snd_pcm_uframes_t __user *_frames = arg;
2737 snd_pcm_sframes_t result;
2738 if (get_user(frames, _frames))
2739 return -EFAULT;
2740 if (put_user(0, _frames))
2741 return -EFAULT;
2742 result = snd_pcm_capture_forward(substream, frames);
2743 __put_user(result, _frames);
2744 return result < 0 ? result : 0;
2745 }
2746 }
0df63e44 2747 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2748}
2749
877211f5
TI		 2750static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2751 unsigned long arg)
1da177e4 2752{
877211f5 2753 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2754
2755 pcm_file = file->private_data;
2756
2757 if (((cmd >> 8) & 0xff) != 'A')
2758 return -ENOTTY;
2759
0df63e44
TI		 2760 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2761 (void __user *)arg);
1da177e4
LT		 2762}
2763
877211f5
TI		 2764static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2765 unsigned long arg)
1da177e4 2766{
877211f5 2767 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2768
2769 pcm_file = file->private_data;
2770
2771 if (((cmd >> 8) & 0xff) != 'A')
2772 return -ENOTTY;
2773
0df63e44
TI		 2774 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2775 (void __user *)arg);
1da177e4
LT		 2776}
2777
bf1bbb5a
TI		 2778int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2779 unsigned int cmd, void *arg)
1da177e4
LT		 2780{
2781 mm_segment_t fs;
2782 int result;
2783
2784 fs = snd_enter_user();
1da177e4
LT		 2785 switch (substream->stream) {
2786 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2787 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2788 (void __user *)arg);
bf1bbb5a 2789 break;
1da177e4 2790 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2791 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2792 (void __user *)arg);
bf1bbb5a 2793 break;
1da177e4 2794 default:
bf1bbb5a
TI		 2795 result = -EINVAL;
2796 break;
1da177e4 2797 }
bf1bbb5a
TI		 2798 snd_leave_user(fs);
2799 return result;
1da177e4
LT		 2800}
2801
e88e8ae6
TI		 2802EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2803
877211f5
TI		 2804static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2805 loff_t * offset)
1da177e4 2806{
877211f5
TI		 2807 struct snd_pcm_file *pcm_file;
2808 struct snd_pcm_substream *substream;
2809 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2810 snd_pcm_sframes_t result;
2811
2812 pcm_file = file->private_data;
2813 substream = pcm_file->substream;
2814 snd_assert(substream != NULL, return -ENXIO);
2815 runtime = substream->runtime;
2816 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2817 return -EBADFD;
2818 if (!frame_aligned(runtime, count))
2819 return -EINVAL;
2820 count = bytes_to_frames(runtime, count);
2821 result = snd_pcm_lib_read(substream, buf, count);
2822 if (result > 0)
2823 result = frames_to_bytes(runtime, result);
2824 return result;
2825}
2826
877211f5
TI		 2827static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2828 size_t count, loff_t * offset)
1da177e4 2829{
877211f5
TI		 2830 struct snd_pcm_file *pcm_file;
2831 struct snd_pcm_substream *substream;
2832 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2833 snd_pcm_sframes_t result;
2834
2835 pcm_file = file->private_data;
2836 substream = pcm_file->substream;
2837 snd_assert(substream != NULL, result = -ENXIO; goto end);
2838 runtime = substream->runtime;
2839 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2840 result = -EBADFD;
2841 goto end;
2842 }
2843 if (!frame_aligned(runtime, count)) {
2844 result = -EINVAL;
2845 goto end;
2846 }
2847 count = bytes_to_frames(runtime, count);
2848 result = snd_pcm_lib_write(substream, buf, count);
2849 if (result > 0)
2850 result = frames_to_bytes(runtime, result);
2851 end:
2852 return result;
2853}
2854
ee0b3e67
BP		 2855static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2856 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2857
2858{
877211f5
TI		 2859 struct snd_pcm_file *pcm_file;
2860 struct snd_pcm_substream *substream;
2861 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2862 snd_pcm_sframes_t result;
2863 unsigned long i;
2864 void __user **bufs;
2865 snd_pcm_uframes_t frames;
2866
ee0b3e67 2867 pcm_file = iocb->ki_filp->private_data;
1da177e4
LT		 2868 substream = pcm_file->substream;
2869 snd_assert(substream != NULL, return -ENXIO);
2870 runtime = substream->runtime;
2871 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2872 return -EBADFD;
ee0b3e67 2873 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2874 return -EINVAL;
ee0b3e67 2875 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2876 return -EINVAL;
ee0b3e67
BP		 2877 frames = bytes_to_samples(runtime, iov->iov_len);
2878 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2879 if (bufs == NULL)
2880 return -ENOMEM;
ee0b3e67
BP		 2881 for (i = 0; i < nr_segs; ++i)
2882 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2883 result = snd_pcm_lib_readv(substream, bufs, frames);
2884 if (result > 0)
2885 result = frames_to_bytes(runtime, result);
2886 kfree(bufs);
2887 return result;
2888}
2889
ee0b3e67
BP		 2890static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2891 unsigned long nr_segs, loff_t pos)
1da177e4 2892{
877211f5
TI		 2893 struct snd_pcm_file *pcm_file;
2894 struct snd_pcm_substream *substream;
2895 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2896 snd_pcm_sframes_t result;
2897 unsigned long i;
2898 void __user **bufs;
2899 snd_pcm_uframes_t frames;
2900
ee0b3e67 2901 pcm_file = iocb->ki_filp->private_data;
1da177e4
LT		 2902 substream = pcm_file->substream;
2903 snd_assert(substream != NULL, result = -ENXIO; goto end);
2904 runtime = substream->runtime;
2905 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2906 result = -EBADFD;
2907 goto end;
2908 }
ee0b3e67
BP		 2909 if (nr_segs > 128 || nr_segs != runtime->channels ||
2910 !frame_aligned(runtime, iov->iov_len)) {
1da177e4
LT		 2911 result = -EINVAL;
2912 goto end;
2913 }
ee0b3e67
BP		 2914 frames = bytes_to_samples(runtime, iov->iov_len);
2915 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2916 if (bufs == NULL)
2917 return -ENOMEM;
ee0b3e67
BP		 2918 for (i = 0; i < nr_segs; ++i)
2919 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2920 result = snd_pcm_lib_writev(substream, bufs, frames);
2921 if (result > 0)
2922 result = frames_to_bytes(runtime, result);
2923 kfree(bufs);
2924 end:
2925 return result;
2926}
2927
2928static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2929{
877211f5
TI		 2930 struct snd_pcm_file *pcm_file;
2931 struct snd_pcm_substream *substream;
2932 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2933 unsigned int mask;
2934 snd_pcm_uframes_t avail;
2935
2936 pcm_file = file->private_data;
2937
2938 substream = pcm_file->substream;
2939 snd_assert(substream != NULL, return -ENXIO);
2940 runtime = substream->runtime;
2941
2942 poll_wait(file, &runtime->sleep, wait);
2943
2944 snd_pcm_stream_lock_irq(substream);
2945 avail = snd_pcm_playback_avail(runtime);
2946 switch (runtime->status->state) {
2947 case SNDRV_PCM_STATE_RUNNING:
2948 case SNDRV_PCM_STATE_PREPARED:
2949 case SNDRV_PCM_STATE_PAUSED:
2950 if (avail >= runtime->control->avail_min) {
2951 mask = POLLOUT | POLLWRNORM;
2952 break;
2953 }
2954 /* Fall through */
2955 case SNDRV_PCM_STATE_DRAINING:
2956 mask = 0;
2957 break;
2958 default:
2959 mask = POLLOUT | POLLWRNORM | POLLERR;
2960 break;
2961 }
2962 snd_pcm_stream_unlock_irq(substream);
2963 return mask;
2964}
2965
2966static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2967{
877211f5
TI		 2968 struct snd_pcm_file *pcm_file;
2969 struct snd_pcm_substream *substream;
2970 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2971 unsigned int mask;
2972 snd_pcm_uframes_t avail;
2973
2974 pcm_file = file->private_data;
2975
2976 substream = pcm_file->substream;
2977 snd_assert(substream != NULL, return -ENXIO);
2978 runtime = substream->runtime;
2979
2980 poll_wait(file, &runtime->sleep, wait);
2981
2982 snd_pcm_stream_lock_irq(substream);
2983 avail = snd_pcm_capture_avail(runtime);
2984 switch (runtime->status->state) {
2985 case SNDRV_PCM_STATE_RUNNING:
2986 case SNDRV_PCM_STATE_PREPARED:
2987 case SNDRV_PCM_STATE_PAUSED:
2988 if (avail >= runtime->control->avail_min) {
2989 mask = POLLIN | POLLRDNORM;
2990 break;
2991 }
2992 mask = 0;
2993 break;
2994 case SNDRV_PCM_STATE_DRAINING:
2995 if (avail > 0) {
2996 mask = POLLIN | POLLRDNORM;
2997 break;
2998 }
2999 /* Fall through */
3000 default:
3001 mask = POLLIN | POLLRDNORM | POLLERR;
3002 break;
3003 }
3004 snd_pcm_stream_unlock_irq(substream);
3005 return mask;
3006}
3007
3008/*
3009 * mmap support
3010 */
3011
3012/*
3013 * Only on coherent architectures, we can mmap the status and the control records
3014 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3015 */
3016#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3017/*
3018 * mmap status record
3019 */
877211f5
TI		 3020static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3021 unsigned long address, int *type)
1da177e4 3022{
877211f5
TI		 3023 struct snd_pcm_substream *substream = area->vm_private_data;
3024 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3025 struct page * page;
3026
3027 if (substream == NULL)
3028 return NOPAGE_OOM;
3029 runtime = substream->runtime;
3030 page = virt_to_page(runtime->status);
b5810039 3031 get_page(page);
1da177e4
LT		 3032 if (type)
3033 *type = VM_FAULT_MINOR;
3034 return page;
3035}
3036
3037static struct vm_operations_struct snd_pcm_vm_ops_status =
3038{
3039 .nopage = snd_pcm_mmap_status_nopage,
3040};
3041
877211f5 3042static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3043 struct vm_area_struct *area)
3044{
877211f5 3045 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3046 long size;
3047 if (!(area->vm_flags & VM_READ))
3048 return -EINVAL;
3049 runtime = substream->runtime;
3050 snd_assert(runtime != NULL, return -EAGAIN);
3051 size = area->vm_end - area->vm_start;
877211f5 3052 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3053 return -EINVAL;
3054 area->vm_ops = &snd_pcm_vm_ops_status;
3055 area->vm_private_data = substream;
3056 area->vm_flags |= VM_RESERVED;
3057 return 0;
3058}
3059
3060/*
3061 * mmap control record
3062 */
877211f5
TI		 3063static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3064 unsigned long address, int *type)
1da177e4 3065{
877211f5
TI		 3066 struct snd_pcm_substream *substream = area->vm_private_data;
3067 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3068 struct page * page;
3069
3070 if (substream == NULL)
3071 return NOPAGE_OOM;
3072 runtime = substream->runtime;
3073 page = virt_to_page(runtime->control);
b5810039 3074 get_page(page);
1da177e4
LT		 3075 if (type)
3076 *type = VM_FAULT_MINOR;
3077 return page;
3078}
3079
3080static struct vm_operations_struct snd_pcm_vm_ops_control =
3081{
3082 .nopage = snd_pcm_mmap_control_nopage,
3083};
3084
877211f5 3085static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3086 struct vm_area_struct *area)
3087{
877211f5 3088 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3089 long size;
3090 if (!(area->vm_flags & VM_READ))
3091 return -EINVAL;
3092 runtime = substream->runtime;
3093 snd_assert(runtime != NULL, return -EAGAIN);
3094 size = area->vm_end - area->vm_start;
877211f5 3095 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3096 return -EINVAL;
3097 area->vm_ops = &snd_pcm_vm_ops_control;
3098 area->vm_private_data = substream;
3099 area->vm_flags |= VM_RESERVED;
3100 return 0;
3101}
3102#else /* ! coherent mmap */
3103/*
3104 * don't support mmap for status and control records.
3105 */
877211f5 3106static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3107 struct vm_area_struct *area)
3108{
3109 return -ENXIO;
3110}
877211f5 3111static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3112 struct vm_area_struct *area)
3113{
3114 return -ENXIO;
3115}
3116#endif /* coherent mmap */
3117
3118/*
3119 * nopage callback for mmapping a RAM page
3120 */
877211f5
TI		 3121static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3122 unsigned long address, int *type)
1da177e4 3123{
877211f5
TI		 3124 struct snd_pcm_substream *substream = area->vm_private_data;
3125 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3126 unsigned long offset;
3127 struct page * page;
3128 void *vaddr;
3129 size_t dma_bytes;
3130
3131 if (substream == NULL)
3132 return NOPAGE_OOM;
3133 runtime = substream->runtime;
3134 offset = area->vm_pgoff << PAGE_SHIFT;
3135 offset += address - area->vm_start;
3136 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3137 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3138 if (offset > dma_bytes - PAGE_SIZE)
3139 return NOPAGE_SIGBUS;
3140 if (substream->ops->page) {
3141 page = substream->ops->page(substream, offset);
3142 if (! page)
3143 return NOPAGE_OOM;
3144 } else {
3145 vaddr = runtime->dma_area + offset;
3146 page = virt_to_page(vaddr);
3147 }
b5810039 3148 get_page(page);
1da177e4
LT		 3149 if (type)
3150 *type = VM_FAULT_MINOR;
3151 return page;
3152}
3153
3154static struct vm_operations_struct snd_pcm_vm_ops_data =
3155{
3156 .open = snd_pcm_mmap_data_open,
3157 .close = snd_pcm_mmap_data_close,
3158 .nopage = snd_pcm_mmap_data_nopage,
3159};
3160
3161/*
3162 * mmap the DMA buffer on RAM
3163 */
877211f5
TI		 3164static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3165 struct vm_area_struct *area)
1da177e4
LT		 3166{
3167 area->vm_ops = &snd_pcm_vm_ops_data;
3168 area->vm_private_data = substream;
3169 area->vm_flags |= VM_RESERVED;
9c323fcb 3170 atomic_inc(&substream->mmap_count);
1da177e4
LT		 3171 return 0;
3172}
3173
3174/*
3175 * mmap the DMA buffer on I/O memory area
3176 */
3177#if SNDRV_PCM_INFO_MMAP_IOMEM
3178static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3179{
3180 .open = snd_pcm_mmap_data_open,
3181 .close = snd_pcm_mmap_data_close,
3182};
3183
877211f5
TI		 3184int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3185 struct vm_area_struct *area)
1da177e4
LT		 3186{
3187 long size;
3188 unsigned long offset;
3189
3190#ifdef pgprot_noncached
3191 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3192#endif
3193 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3194 area->vm_private_data = substream;
3195 area->vm_flags |= VM_IO;
3196 size = area->vm_end - area->vm_start;
3197 offset = area->vm_pgoff << PAGE_SHIFT;
3198 if (io_remap_pfn_range(area, area->vm_start,
3199 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3200 size, area->vm_page_prot))
3201 return -EAGAIN;
9c323fcb 3202 atomic_inc(&substream->mmap_count);
1da177e4
LT		 3203 return 0;
3204}
e88e8ae6
TI		 3205
3206EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3207#endif /* SNDRV_PCM_INFO_MMAP */
3208
3209/*
3210 * mmap DMA buffer
3211 */
877211f5 3212int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3213 struct vm_area_struct *area)
3214{
877211f5 3215 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3216 long size;
3217 unsigned long offset;
3218 size_t dma_bytes;
3219
3220 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3221 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3222 return -EINVAL;
3223 } else {
3224 if (!(area->vm_flags & VM_READ))
3225 return -EINVAL;
3226 }
3227 runtime = substream->runtime;
3228 snd_assert(runtime != NULL, return -EAGAIN);
3229 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3230 return -EBADFD;
3231 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3232 return -ENXIO;
3233 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3234 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3235 return -EINVAL;
3236 size = area->vm_end - area->vm_start;
3237 offset = area->vm_pgoff << PAGE_SHIFT;
3238 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3239 if ((size_t)size > dma_bytes)
3240 return -EINVAL;
3241 if (offset > dma_bytes - size)
3242 return -EINVAL;
3243
3244 if (substream->ops->mmap)
3245 return substream->ops->mmap(substream, area);
3246 else
3247 return snd_pcm_default_mmap(substream, area);
3248}
3249
e88e8ae6
TI		 3250EXPORT_SYMBOL(snd_pcm_mmap_data);
3251
1da177e4
LT		 3252static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3253{
877211f5
TI		 3254 struct snd_pcm_file * pcm_file;
3255 struct snd_pcm_substream *substream;
1da177e4
LT		 3256 unsigned long offset;
3257
3258 pcm_file = file->private_data;
3259 substream = pcm_file->substream;
3260 snd_assert(substream != NULL, return -ENXIO);
3261
3262 offset = area->vm_pgoff << PAGE_SHIFT;
3263 switch (offset) {
3264 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3265 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3266 return -ENXIO;
3267 return snd_pcm_mmap_status(substream, file, area);
3268 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3269 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3270 return -ENXIO;
3271 return snd_pcm_mmap_control(substream, file, area);
3272 default:
3273 return snd_pcm_mmap_data(substream, file, area);
3274 }
3275 return 0;
3276}
3277
3278static int snd_pcm_fasync(int fd, struct file * file, int on)
3279{
877211f5
TI		 3280 struct snd_pcm_file * pcm_file;
3281 struct snd_pcm_substream *substream;
3282 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3283 int err;
3284
3285 pcm_file = file->private_data;
3286 substream = pcm_file->substream;
3287 snd_assert(substream != NULL, return -ENXIO);
3288 runtime = substream->runtime;
3289
3290 err = fasync_helper(fd, file, on, &runtime->fasync);
3291 if (err < 0)
3292 return err;
3293 return 0;
3294}
3295
3296/*
3297 * ioctl32 compat
3298 */
3299#ifdef CONFIG_COMPAT
3300#include "pcm_compat.c"
3301#else
3302#define snd_pcm_ioctl_compat NULL
3303#endif
3304
3305/*
3306 * To be removed helpers to keep binary compatibility
3307 */
3308
59d48582 3309#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3310#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3311#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3312
877211f5
TI		 3313static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3314 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3315{
3316 unsigned int i;
3317
3318 memset(params, 0, sizeof(*params));
3319 params->flags = oparams->flags;
3320 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3321 params->masks[i].bits[0] = oparams->masks[i];
3322 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3323 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3324 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3325 params->info = oparams->info;
3326 params->msbits = oparams->msbits;
3327 params->rate_num = oparams->rate_num;
3328 params->rate_den = oparams->rate_den;
3329 params->fifo_size = oparams->fifo_size;
3330}
3331
877211f5
TI		 3332static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3333 struct snd_pcm_hw_params *params)
1da177e4
LT		 3334{
3335 unsigned int i;
3336
3337 memset(oparams, 0, sizeof(*oparams));
3338 oparams->flags = params->flags;
3339 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3340 oparams->masks[i] = params->masks[i].bits[0];
3341 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3342 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3343 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3344 oparams->info = params->info;
3345 oparams->msbits = params->msbits;
3346 oparams->rate_num = params->rate_num;
3347 oparams->rate_den = params->rate_den;
3348 oparams->fifo_size = params->fifo_size;
3349}
3350
877211f5
TI		 3351static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3352 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3353{
877211f5
TI		 3354 struct snd_pcm_hw_params *params;
3355 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3356 int err;
3357
3358 params = kmalloc(sizeof(*params), GFP_KERNEL);
3359 if (!params) {
3360 err = -ENOMEM;
3361 goto out;
3362 }
3363 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3364 if (!oparams) {
3365 err = -ENOMEM;
3366 goto out;
3367 }
3368
3369 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3370 err = -EFAULT;
3371 goto out;
3372 }
3373 snd_pcm_hw_convert_from_old_params(params, oparams);
3374 err = snd_pcm_hw_refine(substream, params);
3375 snd_pcm_hw_convert_to_old_params(oparams, params);
3376 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3377 if (!err)
3378 err = -EFAULT;
3379 }
3380out:
3381 kfree(params);
3382 kfree(oparams);
3383 return err;
3384}
3385
877211f5
TI		 3386static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3387 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3388{
877211f5
TI		 3389 struct snd_pcm_hw_params *params;
3390 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3391 int err;
3392
3393 params = kmalloc(sizeof(*params), GFP_KERNEL);
3394 if (!params) {
3395 err = -ENOMEM;
3396 goto out;
3397 }
3398 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3399 if (!oparams) {
3400 err = -ENOMEM;
3401 goto out;
3402 }
3403 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3404 err = -EFAULT;
3405 goto out;
3406 }
3407 snd_pcm_hw_convert_from_old_params(params, oparams);
3408 err = snd_pcm_hw_params(substream, params);
3409 snd_pcm_hw_convert_to_old_params(oparams, params);
3410 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3411 if (!err)
3412 err = -EFAULT;
3413 }
3414out:
3415 kfree(params);
3416 kfree(oparams);
3417 return err;
3418}
59d48582 3419#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4
LT		 3420
3421/*
3422 * Register section
3423 */
3424
2af677fc 3425struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3426 {
2af677fc
CL		 3427 .owner = THIS_MODULE,
3428 .write = snd_pcm_write,
ee0b3e67 3429 .aio_write = snd_pcm_aio_write,
f87135f5 3430 .open = snd_pcm_playback_open,
2af677fc
CL		 3431 .release = snd_pcm_release,
3432 .poll = snd_pcm_playback_poll,
3433 .unlocked_ioctl = snd_pcm_playback_ioctl,
3434 .compat_ioctl = snd_pcm_ioctl_compat,
3435 .mmap = snd_pcm_mmap,
3436 .fasync = snd_pcm_fasync,
1da177e4
LT		 3437 },
3438 {
2af677fc
CL		 3439 .owner = THIS_MODULE,
3440 .read = snd_pcm_read,
ee0b3e67 3441 .aio_read = snd_pcm_aio_read,
f87135f5 3442 .open = snd_pcm_capture_open,
2af677fc
CL		 3443 .release = snd_pcm_release,
3444 .poll = snd_pcm_capture_poll,
3445 .unlocked_ioctl = snd_pcm_capture_ioctl,
3446 .compat_ioctl = snd_pcm_ioctl_compat,
3447 .mmap = snd_pcm_mmap,
3448 .fasync = snd_pcm_fasync,
1da177e4
LT		 3449 }
3450};
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