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[ALSA] hda-codec - Fix SPDIF output
[net-next-2.6.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>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
26#include <linux/time.h>
9442e691 27#include <linux/latency.h>
1da177e4
LT		 28#include <linux/uio.h>
29#include <sound/core.h>
30#include <sound/control.h>
31#include <sound/info.h>
32#include <sound/pcm.h>
33#include <sound/pcm_params.h>
34#include <sound/timer.h>
35#include <sound/minors.h>
36#include <asm/io.h>
37
38/*
39 * Compatibility
40 */
41
877211f5 42struct snd_pcm_hw_params_old {
1da177e4
LT		 43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
877211f5 54 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 55 unsigned char reserved[64];
56};
57
59d48582 58#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 59#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 61
877211f5
TI		 62static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 66#endif
f87135f5 67static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 68
69/*
70 *
71 */
72
73DEFINE_RWLOCK(snd_pcm_link_rwlock);
e88e8ae6 74EXPORT_SYMBOL(snd_pcm_link_rwlock);
1da177e4 75
e88e8ae6 76static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4
LT		 77
78static inline mm_segment_t snd_enter_user(void)
79{
80 mm_segment_t fs = get_fs();
81 set_fs(get_ds());
82 return fs;
83}
84
85static inline void snd_leave_user(mm_segment_t fs)
86{
87 set_fs(fs);
88}
89
90
91
877211f5 92int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 93{
877211f5
TI		 94 struct snd_pcm_runtime *runtime;
95 struct snd_pcm *pcm = substream->pcm;
96 struct snd_pcm_str *pstr = substream->pstr;
1da177e4
LT		 97
98 snd_assert(substream != NULL, return -ENXIO);
99 memset(info, 0, sizeof(*info));
100 info->card = pcm->card->number;
101 info->device = pcm->device;
102 info->stream = substream->stream;
103 info->subdevice = substream->number;
104 strlcpy(info->id, pcm->id, sizeof(info->id));
105 strlcpy(info->name, pcm->name, sizeof(info->name));
106 info->dev_class = pcm->dev_class;
107 info->dev_subclass = pcm->dev_subclass;
108 info->subdevices_count = pstr->substream_count;
109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110 strlcpy(info->subname, substream->name, sizeof(info->subname));
111 runtime = substream->runtime;
112 /* AB: FIXME!!! This is definitely nonsense */
113 if (runtime) {
114 info->sync = runtime->sync;
115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116 }
117 return 0;
118}
119
877211f5
TI		 120int snd_pcm_info_user(struct snd_pcm_substream *substream,
121 struct snd_pcm_info __user * _info)
1da177e4 122{
877211f5 123 struct snd_pcm_info *info;
1da177e4
LT		 124 int err;
125
126 info = kmalloc(sizeof(*info), GFP_KERNEL);
127 if (! info)
128 return -ENOMEM;
129 err = snd_pcm_info(substream, info);
130 if (err >= 0) {
131 if (copy_to_user(_info, info, sizeof(*info)))
132 err = -EFAULT;
133 }
134 kfree(info);
135 return err;
136}
137
138#undef RULES_DEBUG
139
140#ifdef RULES_DEBUG
141#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142char *snd_pcm_hw_param_names[] = {
143 HW_PARAM(ACCESS),
144 HW_PARAM(FORMAT),
145 HW_PARAM(SUBFORMAT),
146 HW_PARAM(SAMPLE_BITS),
147 HW_PARAM(FRAME_BITS),
148 HW_PARAM(CHANNELS),
149 HW_PARAM(RATE),
150 HW_PARAM(PERIOD_TIME),
151 HW_PARAM(PERIOD_SIZE),
152 HW_PARAM(PERIOD_BYTES),
153 HW_PARAM(PERIODS),
154 HW_PARAM(BUFFER_TIME),
155 HW_PARAM(BUFFER_SIZE),
156 HW_PARAM(BUFFER_BYTES),
157 HW_PARAM(TICK_TIME),
158};
159#endif
160
877211f5
TI		 161int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params)
1da177e4
LT		 163{
164 unsigned int k;
877211f5
TI		 165 struct snd_pcm_hardware *hw;
166 struct snd_interval *i = NULL;
167 struct snd_mask *m = NULL;
168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 169 unsigned int rstamps[constrs->rules_num];
170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171 unsigned int stamp = 2;
172 int changed, again;
173
174 params->info = 0;
175 params->fifo_size = 0;
176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177 params->msbits = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179 params->rate_num = 0;
180 params->rate_den = 0;
181 }
182
183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184 m = hw_param_mask(params, k);
185 if (snd_mask_empty(m))
186 return -EINVAL;
187 if (!(params->rmask & (1 << k)))
188 continue;
189#ifdef RULES_DEBUG
190 printk("%s = ", snd_pcm_hw_param_names[k]);
191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192#endif
193 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194#ifdef RULES_DEBUG
195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196#endif
197 if (changed)
198 params->cmask |= 1 << k;
199 if (changed < 0)
200 return changed;
201 }
202
203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204 i = hw_param_interval(params, k);
205 if (snd_interval_empty(i))
206 return -EINVAL;
207 if (!(params->rmask & (1 << k)))
208 continue;
209#ifdef RULES_DEBUG
210 printk("%s = ", snd_pcm_hw_param_names[k]);
211 if (i->empty)
212 printk("empty");
213 else
214 printk("%c%u %u%c",
215 i->openmin ? '(' : '[', i->min,
216 i->max, i->openmax ? ')' : ']');
217 printk(" -> ");
218#endif
219 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220#ifdef RULES_DEBUG
221 if (i->empty)
222 printk("empty\n");
223 else
224 printk("%c%u %u%c\n",
225 i->openmin ? '(' : '[', i->min,
226 i->max, i->openmax ? ')' : ']');
227#endif
228 if (changed)
229 params->cmask |= 1 << k;
230 if (changed < 0)
231 return changed;
232 }
233
234 for (k = 0; k < constrs->rules_num; k++)
235 rstamps[k] = 0;
236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238 do {
239 again = 0;
240 for (k = 0; k < constrs->rules_num; k++) {
877211f5 241 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 242 unsigned int d;
243 int doit = 0;
244 if (r->cond && !(r->cond & params->flags))
245 continue;
246 for (d = 0; r->deps[d] >= 0; d++) {
247 if (vstamps[r->deps[d]] > rstamps[k]) {
248 doit = 1;
249 break;
250 }
251 }
252 if (!doit)
253 continue;
254#ifdef RULES_DEBUG
255 printk("Rule %d [%p]: ", k, r->func);
256 if (r->var >= 0) {
257 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258 if (hw_is_mask(r->var)) {
259 m = hw_param_mask(params, r->var);
260 printk("%x", *m->bits);
261 } else {
262 i = hw_param_interval(params, r->var);
263 if (i->empty)
264 printk("empty");
265 else
266 printk("%c%u %u%c",
267 i->openmin ? '(' : '[', i->min,
268 i->max, i->openmax ? ')' : ']');
269 }
270 }
271#endif
272 changed = r->func(params, r);
273#ifdef RULES_DEBUG
274 if (r->var >= 0) {
275 printk(" -> ");
276 if (hw_is_mask(r->var))
277 printk("%x", *m->bits);
278 else {
279 if (i->empty)
280 printk("empty");
281 else
282 printk("%c%u %u%c",
283 i->openmin ? '(' : '[', i->min,
284 i->max, i->openmax ? ')' : ']');
285 }
286 }
287 printk("\n");
288#endif
289 rstamps[k] = stamp;
290 if (changed && r->var >= 0) {
291 params->cmask |= (1 << r->var);
292 vstamps[r->var] = stamp;
293 again = 1;
294 }
295 if (changed < 0)
296 return changed;
297 stamp++;
298 }
299 } while (again);
300 if (!params->msbits) {
301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302 if (snd_interval_single(i))
303 params->msbits = snd_interval_value(i);
304 }
305
306 if (!params->rate_den) {
307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308 if (snd_interval_single(i)) {
309 params->rate_num = snd_interval_value(i);
310 params->rate_den = 1;
311 }
312 }
313
314 hw = &substream->runtime->hw;
315 if (!params->info)
316 params->info = hw->info;
317 if (!params->fifo_size)
318 params->fifo_size = hw->fifo_size;
319 params->rmask = 0;
320 return 0;
321}
322
e88e8ae6
TI		 323EXPORT_SYMBOL(snd_pcm_hw_refine);
324
877211f5
TI		 325static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
326 struct snd_pcm_hw_params __user * _params)
1da177e4 327{
877211f5 328 struct snd_pcm_hw_params *params;
1da177e4
LT		 329 int err;
330
331 params = kmalloc(sizeof(*params), GFP_KERNEL);
332 if (!params) {
333 err = -ENOMEM;
334 goto out;
335 }
336 if (copy_from_user(params, _params, sizeof(*params))) {
337 err = -EFAULT;
338 goto out;
339 }
340 err = snd_pcm_hw_refine(substream, params);
341 if (copy_to_user(_params, params, sizeof(*params))) {
342 if (!err)
343 err = -EFAULT;
344 }
345out:
346 kfree(params);
347 return err;
348}
349
9442e691
TI		 350static int period_to_usecs(struct snd_pcm_runtime *runtime)
351{
352 int usecs;
353
354 if (! runtime->rate)
355 return -1; /* invalid */
356
357 /* take 75% of period time as the deadline */
358 usecs = (750000 / runtime->rate) * runtime->period_size;
359 usecs += ((750000 % runtime->rate) * runtime->period_size) /
360 runtime->rate;
361
362 return usecs;
363}
364
877211f5
TI		 365static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
366 struct snd_pcm_hw_params *params)
1da177e4 367{
877211f5 368 struct snd_pcm_runtime *runtime;
9442e691 369 int err, usecs;
1da177e4
LT		 370 unsigned int bits;
371 snd_pcm_uframes_t frames;
372
373 snd_assert(substream != NULL, return -ENXIO);
374 runtime = substream->runtime;
375 snd_assert(runtime != NULL, return -ENXIO);
376 snd_pcm_stream_lock_irq(substream);
377 switch (runtime->status->state) {
378 case SNDRV_PCM_STATE_OPEN:
379 case SNDRV_PCM_STATE_SETUP:
380 case SNDRV_PCM_STATE_PREPARED:
381 break;
382 default:
383 snd_pcm_stream_unlock_irq(substream);
384 return -EBADFD;
385 }
386 snd_pcm_stream_unlock_irq(substream);
387#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
388 if (!substream->oss.oss)
389#endif
9c323fcb 390 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 391 return -EBADFD;
392
393 params->rmask = ~0U;
394 err = snd_pcm_hw_refine(substream, params);
395 if (err < 0)
396 goto _error;
397
398 err = snd_pcm_hw_params_choose(substream, params);
399 if (err < 0)
400 goto _error;
401
402 if (substream->ops->hw_params != NULL) {
403 err = substream->ops->hw_params(substream, params);
404 if (err < 0)
405 goto _error;
406 }
407
408 runtime->access = params_access(params);
409 runtime->format = params_format(params);
410 runtime->subformat = params_subformat(params);
411 runtime->channels = params_channels(params);
412 runtime->rate = params_rate(params);
413 runtime->period_size = params_period_size(params);
414 runtime->periods = params_periods(params);
415 runtime->buffer_size = params_buffer_size(params);
416 runtime->tick_time = params_tick_time(params);
417 runtime->info = params->info;
418 runtime->rate_num = params->rate_num;
419 runtime->rate_den = params->rate_den;
420
421 bits = snd_pcm_format_physical_width(runtime->format);
422 runtime->sample_bits = bits;
423 bits *= runtime->channels;
424 runtime->frame_bits = bits;
425 frames = 1;
426 while (bits % 8 != 0) {
427 bits *= 2;
428 frames *= 2;
429 }
430 runtime->byte_align = bits / 8;
431 runtime->min_align = frames;
432
433 /* Default sw params */
434 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
435 runtime->period_step = 1;
436 runtime->sleep_min = 0;
437 runtime->control->avail_min = runtime->period_size;
438 runtime->xfer_align = runtime->period_size;
439 runtime->start_threshold = 1;
440 runtime->stop_threshold = runtime->buffer_size;
441 runtime->silence_threshold = 0;
442 runtime->silence_size = 0;
443 runtime->boundary = runtime->buffer_size;
444 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
445 runtime->boundary *= 2;
446
447 snd_pcm_timer_resolution_change(substream);
448 runtime->status->state = SNDRV_PCM_STATE_SETUP;
9442e691
TI		 449
450 remove_acceptable_latency(substream->latency_id);
451 if ((usecs = period_to_usecs(runtime)) >= 0)
452 set_acceptable_latency(substream->latency_id, usecs);
1da177e4
LT		 453 return 0;
454 _error:
455 /* hardware might be unuseable from this time,
456 so we force application to retry to set
457 the correct hardware parameter settings */
458 runtime->status->state = SNDRV_PCM_STATE_OPEN;
459 if (substream->ops->hw_free != NULL)
460 substream->ops->hw_free(substream);
461 return err;
462}
463
877211f5
TI		 464static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
465 struct snd_pcm_hw_params __user * _params)
1da177e4 466{
877211f5 467 struct snd_pcm_hw_params *params;
1da177e4
LT		 468 int err;
469
470 params = kmalloc(sizeof(*params), GFP_KERNEL);
471 if (!params) {
472 err = -ENOMEM;
473 goto out;
474 }
475 if (copy_from_user(params, _params, sizeof(*params))) {
476 err = -EFAULT;
477 goto out;
478 }
479 err = snd_pcm_hw_params(substream, params);
480 if (copy_to_user(_params, params, sizeof(*params))) {
481 if (!err)
482 err = -EFAULT;
483 }
484out:
485 kfree(params);
486 return err;
487}
488
877211f5 489static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 490{
877211f5 491 struct snd_pcm_runtime *runtime;
1da177e4
LT		 492 int result = 0;
493
494 snd_assert(substream != NULL, return -ENXIO);
495 runtime = substream->runtime;
496 snd_assert(runtime != NULL, return -ENXIO);
497 snd_pcm_stream_lock_irq(substream);
498 switch (runtime->status->state) {
499 case SNDRV_PCM_STATE_SETUP:
500 case SNDRV_PCM_STATE_PREPARED:
501 break;
502 default:
503 snd_pcm_stream_unlock_irq(substream);
504 return -EBADFD;
505 }
506 snd_pcm_stream_unlock_irq(substream);
9c323fcb 507 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 508 return -EBADFD;
509 if (substream->ops->hw_free)
510 result = substream->ops->hw_free(substream);
511 runtime->status->state = SNDRV_PCM_STATE_OPEN;
9442e691 512 remove_acceptable_latency(substream->latency_id);
1da177e4
LT		 513 return result;
514}
515
877211f5
TI		 516static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
517 struct snd_pcm_sw_params *params)
1da177e4 518{
877211f5 519 struct snd_pcm_runtime *runtime;
1da177e4
LT		 520
521 snd_assert(substream != NULL, return -ENXIO);
522 runtime = substream->runtime;
523 snd_assert(runtime != NULL, return -ENXIO);
524 snd_pcm_stream_lock_irq(substream);
525 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
526 snd_pcm_stream_unlock_irq(substream);
527 return -EBADFD;
528 }
529 snd_pcm_stream_unlock_irq(substream);
530
531 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
532 return -EINVAL;
533 if (params->avail_min == 0)
534 return -EINVAL;
535 if (params->xfer_align == 0 ||
536 params->xfer_align % runtime->min_align != 0)
537 return -EINVAL;
538 if (params->silence_size >= runtime->boundary) {
539 if (params->silence_threshold != 0)
540 return -EINVAL;
541 } else {
542 if (params->silence_size > params->silence_threshold)
543 return -EINVAL;
544 if (params->silence_threshold > runtime->buffer_size)
545 return -EINVAL;
546 }
547 snd_pcm_stream_lock_irq(substream);
548 runtime->tstamp_mode = params->tstamp_mode;
549 runtime->sleep_min = params->sleep_min;
550 runtime->period_step = params->period_step;
551 runtime->control->avail_min = params->avail_min;
552 runtime->start_threshold = params->start_threshold;
553 runtime->stop_threshold = params->stop_threshold;
554 runtime->silence_threshold = params->silence_threshold;
555 runtime->silence_size = params->silence_size;
556 runtime->xfer_align = params->xfer_align;
557 params->boundary = runtime->boundary;
558 if (snd_pcm_running(substream)) {
559 if (runtime->sleep_min)
560 snd_pcm_tick_prepare(substream);
561 else
562 snd_pcm_tick_set(substream, 0);
563 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
564 runtime->silence_size > 0)
565 snd_pcm_playback_silence(substream, ULONG_MAX);
566 wake_up(&runtime->sleep);
567 }
568 snd_pcm_stream_unlock_irq(substream);
569 return 0;
570}
571
877211f5
TI		 572static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
573 struct snd_pcm_sw_params __user * _params)
1da177e4 574{
877211f5 575 struct snd_pcm_sw_params params;
1da177e4
LT		 576 int err;
577 if (copy_from_user(&params, _params, sizeof(params)))
578 return -EFAULT;
579 err = snd_pcm_sw_params(substream, &params);
580 if (copy_to_user(_params, &params, sizeof(params)))
581 return -EFAULT;
582 return err;
583}
584
877211f5
TI		 585int snd_pcm_status(struct snd_pcm_substream *substream,
586 struct snd_pcm_status *status)
1da177e4 587{
877211f5 588 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 589
590 snd_pcm_stream_lock_irq(substream);
591 status->state = runtime->status->state;
592 status->suspended_state = runtime->status->suspended_state;
593 if (status->state == SNDRV_PCM_STATE_OPEN)
594 goto _end;
595 status->trigger_tstamp = runtime->trigger_tstamp;
596 if (snd_pcm_running(substream)) {
597 snd_pcm_update_hw_ptr(substream);
598 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
599 status->tstamp = runtime->status->tstamp;
600 else
07799e75 601 getnstimeofday(&status->tstamp);
1da177e4 602 } else
07799e75 603 getnstimeofday(&status->tstamp);
1da177e4
LT		 604 status->appl_ptr = runtime->control->appl_ptr;
605 status->hw_ptr = runtime->status->hw_ptr;
606 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
607 status->avail = snd_pcm_playback_avail(runtime);
608 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
609 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
610 status->delay = runtime->buffer_size - status->avail;
611 else
612 status->delay = 0;
613 } else {
614 status->avail = snd_pcm_capture_avail(runtime);
615 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
616 status->delay = status->avail;
617 else
618 status->delay = 0;
619 }
620 status->avail_max = runtime->avail_max;
621 status->overrange = runtime->overrange;
622 runtime->avail_max = 0;
623 runtime->overrange = 0;
624 _end:
625 snd_pcm_stream_unlock_irq(substream);
626 return 0;
627}
628
877211f5
TI		 629static int snd_pcm_status_user(struct snd_pcm_substream *substream,
630 struct snd_pcm_status __user * _status)
1da177e4 631{
877211f5
TI		 632 struct snd_pcm_status status;
633 struct snd_pcm_runtime *runtime;
1da177e4
LT		 634 int res;
635
636 snd_assert(substream != NULL, return -ENXIO);
637 runtime = substream->runtime;
638 memset(&status, 0, sizeof(status));
639 res = snd_pcm_status(substream, &status);
640 if (res < 0)
641 return res;
642 if (copy_to_user(_status, &status, sizeof(status)))
643 return -EFAULT;
644 return 0;
645}
646
877211f5
TI		 647static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
648 struct snd_pcm_channel_info * info)
1da177e4 649{
877211f5 650 struct snd_pcm_runtime *runtime;
1da177e4
LT		 651 unsigned int channel;
652
653 snd_assert(substream != NULL, return -ENXIO);
654 channel = info->channel;
655 runtime = substream->runtime;
656 snd_pcm_stream_lock_irq(substream);
657 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
658 snd_pcm_stream_unlock_irq(substream);
659 return -EBADFD;
660 }
661 snd_pcm_stream_unlock_irq(substream);
662 if (channel >= runtime->channels)
663 return -EINVAL;
664 memset(info, 0, sizeof(*info));
665 info->channel = channel;
666 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
667}
668
877211f5
TI		 669static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
670 struct snd_pcm_channel_info __user * _info)
1da177e4 671{
877211f5 672 struct snd_pcm_channel_info info;
1da177e4
LT		 673 int res;
674
675 if (copy_from_user(&info, _info, sizeof(info)))
676 return -EFAULT;
677 res = snd_pcm_channel_info(substream, &info);
678 if (res < 0)
679 return res;
680 if (copy_to_user(_info, &info, sizeof(info)))
681 return -EFAULT;
682 return 0;
683}
684
877211f5 685static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 686{
877211f5 687 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 688 if (runtime->trigger_master == NULL)
689 return;
690 if (runtime->trigger_master == substream) {
07799e75 691 getnstimeofday(&runtime->trigger_tstamp);
1da177e4
LT		 692 } else {
693 snd_pcm_trigger_tstamp(runtime->trigger_master);
694 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
695 }
696 runtime->trigger_master = NULL;
697}
698
699struct action_ops {
877211f5
TI		 700 int (*pre_action)(struct snd_pcm_substream *substream, int state);
701 int (*do_action)(struct snd_pcm_substream *substream, int state);
702 void (*undo_action)(struct snd_pcm_substream *substream, int state);
703 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 704};
705
706/*
707 * this functions is core for handling of linked stream
708 * Note: the stream state might be changed also on failure
709 * Note2: call with calling stream lock + link lock
710 */
711static int snd_pcm_action_group(struct action_ops *ops,
877211f5 712 struct snd_pcm_substream *substream,
1da177e4
LT		 713 int state, int do_lock)
714{
877211f5
TI		 715 struct snd_pcm_substream *s = NULL;
716 struct snd_pcm_substream *s1;
1da177e4
LT		 717 int res = 0;
718
ef991b95 719 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 720 if (do_lock && s != substream)
721 spin_lock(&s->self_group.lock);
722 res = ops->pre_action(s, state);
723 if (res < 0)
724 goto _unlock;
725 }
ef991b95 726 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 727 res = ops->do_action(s, state);
728 if (res < 0) {
729 if (ops->undo_action) {
ef991b95 730 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 731 if (s1 == s) /* failed stream */
732 break;
733 ops->undo_action(s1, state);
734 }
735 }
736 s = NULL; /* unlock all */
737 goto _unlock;
738 }
739 }
ef991b95 740 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 741 ops->post_action(s, state);
742 }
743 _unlock:
744 if (do_lock) {
745 /* unlock streams */
ef991b95 746 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 747 if (s1 != substream)
748 spin_unlock(&s1->self_group.lock);
749 if (s1 == s) /* end */
750 break;
751 }
752 }
753 return res;
754}
755
756/*
757 * Note: call with stream lock
758 */
759static int snd_pcm_action_single(struct action_ops *ops,
877211f5 760 struct snd_pcm_substream *substream,
1da177e4
LT		 761 int state)
762{
763 int res;
764
765 res = ops->pre_action(substream, state);
766 if (res < 0)
767 return res;
768 res = ops->do_action(substream, state);
769 if (res == 0)
770 ops->post_action(substream, state);
771 else if (ops->undo_action)
772 ops->undo_action(substream, state);
773 return res;
774}
775
776/*
777 * Note: call with stream lock
778 */
779static int snd_pcm_action(struct action_ops *ops,
877211f5 780 struct snd_pcm_substream *substream,
1da177e4
LT		 781 int state)
782{
783 int res;
784
785 if (snd_pcm_stream_linked(substream)) {
786 if (!spin_trylock(&substream->group->lock)) {
787 spin_unlock(&substream->self_group.lock);
788 spin_lock(&substream->group->lock);
789 spin_lock(&substream->self_group.lock);
790 }
791 res = snd_pcm_action_group(ops, substream, state, 1);
792 spin_unlock(&substream->group->lock);
793 } else {
794 res = snd_pcm_action_single(ops, substream, state);
795 }
796 return res;
797}
798
799/*
800 * Note: don't use any locks before
801 */
802static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 803 struct snd_pcm_substream *substream,
1da177e4
LT		 804 int state)
805{
806 int res;
807
808 read_lock_irq(&snd_pcm_link_rwlock);
809 if (snd_pcm_stream_linked(substream)) {
810 spin_lock(&substream->group->lock);
811 spin_lock(&substream->self_group.lock);
812 res = snd_pcm_action_group(ops, substream, state, 1);
813 spin_unlock(&substream->self_group.lock);
814 spin_unlock(&substream->group->lock);
815 } else {
816 spin_lock(&substream->self_group.lock);
817 res = snd_pcm_action_single(ops, substream, state);
818 spin_unlock(&substream->self_group.lock);
819 }
820 read_unlock_irq(&snd_pcm_link_rwlock);
821 return res;
822}
823
824/*
825 */
826static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 827 struct snd_pcm_substream *substream,
1da177e4
LT		 828 int state)
829{
830 int res;
831
832 down_read(&snd_pcm_link_rwsem);
833 if (snd_pcm_stream_linked(substream))
834 res = snd_pcm_action_group(ops, substream, state, 0);
835 else
836 res = snd_pcm_action_single(ops, substream, state);
837 up_read(&snd_pcm_link_rwsem);
838 return res;
839}
840
841/*
842 * start callbacks
843 */
877211f5 844static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 845{
877211f5 846 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 847 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
848 return -EBADFD;
849 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
850 !snd_pcm_playback_data(substream))
851 return -EPIPE;
852 runtime->trigger_master = substream;
853 return 0;
854}
855
877211f5 856static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 857{
858 if (substream->runtime->trigger_master != substream)
859 return 0;
860 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
861}
862
877211f5 863static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 864{
865 if (substream->runtime->trigger_master == substream)
866 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
867}
868
877211f5 869static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 870{
877211f5 871 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 872 snd_pcm_trigger_tstamp(substream);
873 runtime->status->state = state;
874 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
875 runtime->silence_size > 0)
876 snd_pcm_playback_silence(substream, ULONG_MAX);
877 if (runtime->sleep_min)
878 snd_pcm_tick_prepare(substream);
879 if (substream->timer)
877211f5
TI		 880 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
881 &runtime->trigger_tstamp);
1da177e4
LT		 882}
883
884static struct action_ops snd_pcm_action_start = {
885 .pre_action = snd_pcm_pre_start,
886 .do_action = snd_pcm_do_start,
887 .undo_action = snd_pcm_undo_start,
888 .post_action = snd_pcm_post_start
889};
890
891/**
892 * snd_pcm_start
df8db936 893 * @substream: the PCM substream instance
1da177e4
LT		 894 *
895 * Start all linked streams.
896 */
877211f5 897int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 898{
877211f5
TI		 899 return snd_pcm_action(&snd_pcm_action_start, substream,
900 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 901}
902
903/*
904 * stop callbacks
905 */
877211f5 906static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 907{
877211f5 908 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 909 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
910 return -EBADFD;
911 runtime->trigger_master = substream;
912 return 0;
913}
914
877211f5 915static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 916{
917 if (substream->runtime->trigger_master == substream &&
918 snd_pcm_running(substream))
919 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
920 return 0; /* unconditonally stop all substreams */
921}
922
877211f5 923static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 924{
877211f5 925 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 926 if (runtime->status->state != state) {
927 snd_pcm_trigger_tstamp(substream);
928 if (substream->timer)
877211f5
TI		 929 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
930 &runtime->trigger_tstamp);
1da177e4
LT		 931 runtime->status->state = state;
932 snd_pcm_tick_set(substream, 0);
933 }
934 wake_up(&runtime->sleep);
935}
936
937static struct action_ops snd_pcm_action_stop = {
938 .pre_action = snd_pcm_pre_stop,
939 .do_action = snd_pcm_do_stop,
940 .post_action = snd_pcm_post_stop
941};
942
943/**
944 * snd_pcm_stop
df8db936
TI		 945 * @substream: the PCM substream instance
946 * @state: PCM state after stopping the stream
1da177e4
LT		 947 *
948 * Try to stop all running streams in the substream group.
949 * The state of each stream is changed to the given value after that unconditionally.
950 */
877211f5 951int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 952{
953 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
954}
955
e88e8ae6
TI		 956EXPORT_SYMBOL(snd_pcm_stop);
957
1da177e4
LT		 958/**
959 * snd_pcm_drain_done
df8db936 960 * @substream: the PCM substream
1da177e4
LT		 961 *
962 * Stop the DMA only when the given stream is playback.
963 * The state is changed to SETUP.
964 * Unlike snd_pcm_stop(), this affects only the given stream.
965 */
877211f5 966int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 967{
877211f5
TI		 968 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
969 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 970}
971
972/*
973 * pause callbacks
974 */
877211f5 975static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 976{
877211f5 977 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 978 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
979 return -ENOSYS;
980 if (push) {
981 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
982 return -EBADFD;
983 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
984 return -EBADFD;
985 runtime->trigger_master = substream;
986 return 0;
987}
988
877211f5 989static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 990{
991 if (substream->runtime->trigger_master != substream)
992 return 0;
993 return substream->ops->trigger(substream,
994 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
995 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
996}
997
877211f5 998static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 999{
1000 if (substream->runtime->trigger_master == substream)
1001 substream->ops->trigger(substream,
1002 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1003 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1004}
1005
877211f5 1006static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1007{
877211f5 1008 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1009 snd_pcm_trigger_tstamp(substream);
1010 if (push) {
1011 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1012 if (substream->timer)
877211f5
TI		 1013 snd_timer_notify(substream->timer,
1014 SNDRV_TIMER_EVENT_MPAUSE,
1015 &runtime->trigger_tstamp);
1da177e4
LT		 1016 snd_pcm_tick_set(substream, 0);
1017 wake_up(&runtime->sleep);
1018 } else {
1019 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1020 if (runtime->sleep_min)
1021 snd_pcm_tick_prepare(substream);
1022 if (substream->timer)
877211f5
TI		 1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MCONTINUE,
1025 &runtime->trigger_tstamp);
1da177e4
LT		 1026 }
1027}
1028
1029static struct action_ops snd_pcm_action_pause = {
1030 .pre_action = snd_pcm_pre_pause,
1031 .do_action = snd_pcm_do_pause,
1032 .undo_action = snd_pcm_undo_pause,
1033 .post_action = snd_pcm_post_pause
1034};
1035
1036/*
1037 * Push/release the pause for all linked streams.
1038 */
877211f5 1039static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1040{
1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1042}
1043
1044#ifdef CONFIG_PM
1045/* suspend */
1046
877211f5 1047static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1048{
877211f5 1049 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1051 return -EBUSY;
1052 runtime->trigger_master = substream;
1053 return 0;
1054}
1055
877211f5 1056static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1057{
877211f5 1058 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1059 if (runtime->trigger_master != substream)
1060 return 0;
1061 if (! snd_pcm_running(substream))
1062 return 0;
1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1064 return 0; /* suspend unconditionally */
1065}
1066
877211f5 1067static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1068{
877211f5 1069 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1070 snd_pcm_trigger_tstamp(substream);
1071 if (substream->timer)
877211f5
TI		 1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1073 &runtime->trigger_tstamp);
1da177e4
LT		 1074 runtime->status->suspended_state = runtime->status->state;
1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1076 snd_pcm_tick_set(substream, 0);
1077 wake_up(&runtime->sleep);
1078}
1079
1080static struct action_ops snd_pcm_action_suspend = {
1081 .pre_action = snd_pcm_pre_suspend,
1082 .do_action = snd_pcm_do_suspend,
1083 .post_action = snd_pcm_post_suspend
1084};
1085
1086/**
1087 * snd_pcm_suspend
df8db936 1088 * @substream: the PCM substream
1da177e4
LT		 1089 *
1090 * Trigger SUSPEND to all linked streams.
1091 * After this call, all streams are changed to SUSPENDED state.
1092 */
877211f5 1093int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1094{
1095 int err;
1096 unsigned long flags;
1097
603bf524
TI		 1098 if (! substream)
1099 return 0;
1100
1da177e4
LT		 1101 snd_pcm_stream_lock_irqsave(substream, flags);
1102 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1103 snd_pcm_stream_unlock_irqrestore(substream, flags);
1104 return err;
1105}
1106
e88e8ae6
TI		 1107EXPORT_SYMBOL(snd_pcm_suspend);
1108
1da177e4
LT		 1109/**
1110 * snd_pcm_suspend_all
df8db936 1111 * @pcm: the PCM instance
1da177e4
LT		 1112 *
1113 * Trigger SUSPEND to all substreams in the given pcm.
1114 * After this call, all streams are changed to SUSPENDED state.
1115 */
877211f5 1116int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1117{
877211f5 1118 struct snd_pcm_substream *substream;
1da177e4
LT		 1119 int stream, err = 0;
1120
603bf524
TI		 1121 if (! pcm)
1122 return 0;
1123
1da177e4 1124 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1125 for (substream = pcm->streams[stream].substream;
1126 substream; substream = substream->next) {
1da177e4
LT		 1127 /* FIXME: the open/close code should lock this as well */
1128 if (substream->runtime == NULL)
1129 continue;
1130 err = snd_pcm_suspend(substream);
1131 if (err < 0 && err != -EBUSY)
1132 return err;
1133 }
1134 }
1135 return 0;
1136}
1137
e88e8ae6
TI		 1138EXPORT_SYMBOL(snd_pcm_suspend_all);
1139
1da177e4
LT		 1140/* resume */
1141
877211f5 1142static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1143{
877211f5 1144 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1145 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1146 return -ENOSYS;
1147 runtime->trigger_master = substream;
1148 return 0;
1149}
1150
877211f5 1151static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1152{
877211f5 1153 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1154 if (runtime->trigger_master != substream)
1155 return 0;
1156 /* DMA not running previously? */
1157 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1158 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1159 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1160 return 0;
1161 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1162}
1163
877211f5 1164static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1165{
1166 if (substream->runtime->trigger_master == substream &&
1167 snd_pcm_running(substream))
1168 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1169}
1170
877211f5 1171static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1172{
877211f5 1173 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1174 snd_pcm_trigger_tstamp(substream);
1175 if (substream->timer)
877211f5
TI		 1176 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1177 &runtime->trigger_tstamp);
1da177e4
LT		 1178 runtime->status->state = runtime->status->suspended_state;
1179 if (runtime->sleep_min)
1180 snd_pcm_tick_prepare(substream);
1181}
1182
1183static struct action_ops snd_pcm_action_resume = {
1184 .pre_action = snd_pcm_pre_resume,
1185 .do_action = snd_pcm_do_resume,
1186 .undo_action = snd_pcm_undo_resume,
1187 .post_action = snd_pcm_post_resume
1188};
1189
877211f5 1190static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1191{
877211f5 1192 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1193 int res;
1194
1195 snd_power_lock(card);
cbac4b0c 1196 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1197 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1198 snd_power_unlock(card);
1199 return res;
1200}
1201
1202#else
1203
877211f5 1204static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1205{
1206 return -ENOSYS;
1207}
1208
1209#endif /* CONFIG_PM */
1210
1211/*
1212 * xrun ioctl
1213 *
1214 * Change the RUNNING stream(s) to XRUN state.
1215 */
877211f5 1216static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1217{
877211f5
TI		 1218 struct snd_card *card = substream->pcm->card;
1219 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1220 int result;
1221
1222 snd_power_lock(card);
1223 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1224 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1225 if (result < 0)
1226 goto _unlock;
1227 }
1228
1229 snd_pcm_stream_lock_irq(substream);
1230 switch (runtime->status->state) {
1231 case SNDRV_PCM_STATE_XRUN:
1232 result = 0; /* already there */
1233 break;
1234 case SNDRV_PCM_STATE_RUNNING:
1235 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1236 break;
1237 default:
1238 result = -EBADFD;
1239 }
1240 snd_pcm_stream_unlock_irq(substream);
1241 _unlock:
1242 snd_power_unlock(card);
1243 return result;
1244}
1245
1246/*
1247 * reset ioctl
1248 */
877211f5 1249static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1250{
877211f5 1251 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1252 switch (runtime->status->state) {
1253 case SNDRV_PCM_STATE_RUNNING:
1254 case SNDRV_PCM_STATE_PREPARED:
1255 case SNDRV_PCM_STATE_PAUSED:
1256 case SNDRV_PCM_STATE_SUSPENDED:
1257 return 0;
1258 default:
1259 return -EBADFD;
1260 }
1261}
1262
877211f5 1263static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1264{
877211f5 1265 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1266 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1267 if (err < 0)
1268 return err;
1269 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1270 runtime->hw_ptr_base = 0;
877211f5
TI		 1271 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1272 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1273 runtime->silence_start = runtime->status->hw_ptr;
1274 runtime->silence_filled = 0;
1275 return 0;
1276}
1277
877211f5 1278static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1279{
877211f5 1280 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1281 runtime->control->appl_ptr = runtime->status->hw_ptr;
1282 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1283 runtime->silence_size > 0)
1284 snd_pcm_playback_silence(substream, ULONG_MAX);
1285}
1286
1287static struct action_ops snd_pcm_action_reset = {
1288 .pre_action = snd_pcm_pre_reset,
1289 .do_action = snd_pcm_do_reset,
1290 .post_action = snd_pcm_post_reset
1291};
1292
877211f5 1293static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1294{
1295 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1296}
1297
1298/*
1299 * prepare ioctl
1300 */
0df63e44
TI		 1301/* we use the second argument for updating f_flags */
1302static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1303 int f_flags)
1da177e4 1304{
877211f5 1305 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1306 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1307 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1308 return -EBADFD;
1309 if (snd_pcm_running(substream))
1310 return -EBUSY;
0df63e44 1311 substream->f_flags = f_flags;
1da177e4
LT		 1312 return 0;
1313}
1314
877211f5 1315static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1316{
1317 int err;
1318 err = substream->ops->prepare(substream);
1319 if (err < 0)
1320 return err;
1321 return snd_pcm_do_reset(substream, 0);
1322}
1323
877211f5 1324static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1325{
877211f5 1326 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1327 runtime->control->appl_ptr = runtime->status->hw_ptr;
1328 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1329}
1330
1331static struct action_ops snd_pcm_action_prepare = {
1332 .pre_action = snd_pcm_pre_prepare,
1333 .do_action = snd_pcm_do_prepare,
1334 .post_action = snd_pcm_post_prepare
1335};
1336
1337/**
1338 * snd_pcm_prepare
df8db936 1339 * @substream: the PCM substream instance
0df63e44 1340 * @file: file to refer f_flags
df8db936
TI		 1341 *
1342 * Prepare the PCM substream to be triggerable.
1da177e4 1343 */
0df63e44
TI		 1344static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1345 struct file *file)
1da177e4
LT		 1346{
1347 int res;
877211f5 1348 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1349 int f_flags;
1350
1351 if (file)
1352 f_flags = file->f_flags;
1353 else
1354 f_flags = substream->f_flags;
1da177e4
LT		 1355
1356 snd_power_lock(card);
cbac4b0c 1357 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1358 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1359 substream, f_flags);
1da177e4
LT		 1360 snd_power_unlock(card);
1361 return res;
1362}
1363
1364/*
1365 * drain ioctl
1366 */
1367
877211f5 1368static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1369{
0df63e44 1370 if (substream->f_flags & O_NONBLOCK)
1da177e4
LT		 1371 return -EAGAIN;
1372 substream->runtime->trigger_master = substream;
1373 return 0;
1374}
1375
877211f5 1376static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1377{
877211f5 1378 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1379 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1380 switch (runtime->status->state) {
1381 case SNDRV_PCM_STATE_PREPARED:
1382 /* start playback stream if possible */
1383 if (! snd_pcm_playback_empty(substream)) {
1384 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1385 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1386 }
1387 break;
1388 case SNDRV_PCM_STATE_RUNNING:
1389 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1390 break;
1391 default:
1392 break;
1393 }
1394 } else {
1395 /* stop running stream */
1396 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1397 int state = snd_pcm_capture_avail(runtime) > 0 ?
1398 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1399 snd_pcm_do_stop(substream, state);
1400 snd_pcm_post_stop(substream, state);
1401 }
1402 }
1403 return 0;
1404}
1405
877211f5 1406static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1407{
1408}
1409
1410static struct action_ops snd_pcm_action_drain_init = {
1411 .pre_action = snd_pcm_pre_drain_init,
1412 .do_action = snd_pcm_do_drain_init,
1413 .post_action = snd_pcm_post_drain_init
1414};
1415
1416struct drain_rec {
877211f5 1417 struct snd_pcm_substream *substream;
1da177e4
LT		 1418 wait_queue_t wait;
1419 snd_pcm_uframes_t stop_threshold;
1420};
1421
877211f5 1422static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1423
1424/*
1425 * Drain the stream(s).
1426 * When the substream is linked, sync until the draining of all playback streams
1427 * is finished.
1428 * After this call, all streams are supposed to be either SETUP or DRAINING
1429 * (capture only) state.
1430 */
877211f5 1431static int snd_pcm_drain(struct snd_pcm_substream *substream)
1da177e4 1432{
877211f5
TI		 1433 struct snd_card *card;
1434 struct snd_pcm_runtime *runtime;
ef991b95 1435 struct snd_pcm_substream *s;
1da177e4
LT		 1436 int result = 0;
1437 int i, num_drecs;
1438 struct drain_rec *drec, drec_tmp, *d;
1439
1440 snd_assert(substream != NULL, return -ENXIO);
1441 card = substream->pcm->card;
1442 runtime = substream->runtime;
1443
1444 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1445 return -EBADFD;
1446
1da177e4
LT		 1447 snd_power_lock(card);
1448 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1449 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1450 if (result < 0) {
1451 snd_power_unlock(card);
1452 return result;
1453 }
1da177e4
LT		 1454 }
1455
1456 /* allocate temporary record for drain sync */
21cb2a2e 1457 down_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1458 if (snd_pcm_stream_linked(substream)) {
1459 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1460 if (! drec) {
21cb2a2e
TI		 1461 up_read(&snd_pcm_link_rwsem);
1462 snd_power_unlock(card);
1463 return -ENOMEM;
1da177e4
LT		 1464 }
1465 } else
1466 drec = &drec_tmp;
1467
21cb2a2e 1468 /* count only playback streams */
1da177e4 1469 num_drecs = 0;
ef991b95 1470 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 1471 runtime = s->runtime;
1da177e4
LT		 1472 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1473 d = &drec[num_drecs++];
1474 d->substream = s;
1475 init_waitqueue_entry(&d->wait, current);
1476 add_wait_queue(&runtime->sleep, &d->wait);
1477 /* stop_threshold fixup to avoid endless loop when
1478 * stop_threshold > buffer_size
1479 */
1480 d->stop_threshold = runtime->stop_threshold;
1481 if (runtime->stop_threshold > runtime->buffer_size)
1482 runtime->stop_threshold = runtime->buffer_size;
1483 }
1484 }
21cb2a2e 1485 up_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1486
1487 snd_pcm_stream_lock_irq(substream);
1488 /* resume pause */
1489 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1490 snd_pcm_pause(substream, 0);
1491
1492 /* pre-start/stop - all running streams are changed to DRAINING state */
1493 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1494 if (result < 0) {
1495 snd_pcm_stream_unlock_irq(substream);
1496 goto _error;
1497 }
1da177e4
LT		 1498
1499 for (;;) {
1500 long tout;
1501 if (signal_pending(current)) {
1502 result = -ERESTARTSYS;
1503 break;
1504 }
21cb2a2e
TI		 1505 /* all finished? */
1506 for (i = 0; i < num_drecs; i++) {
1507 runtime = drec[i].substream->runtime;
1508 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1509 break;
1510 }
1511 if (i == num_drecs)
1512 break; /* yes, all drained */
1513
1da177e4
LT		 1514 set_current_state(TASK_INTERRUPTIBLE);
1515 snd_pcm_stream_unlock_irq(substream);
1516 snd_power_unlock(card);
1517 tout = schedule_timeout(10 * HZ);
1518 snd_power_lock(card);
1519 snd_pcm_stream_lock_irq(substream);
1520 if (tout == 0) {
1521 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1522 result = -ESTRPIPE;
1523 else {
1524 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1525 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1526 result = -EIO;
1527 }
1528 break;
1529 }
1da177e4 1530 }
21cb2a2e
TI		 1531
1532 snd_pcm_stream_unlock_irq(substream);
1533
1534 _error:
1da177e4
LT		 1535 for (i = 0; i < num_drecs; i++) {
1536 d = &drec[i];
1537 runtime = d->substream->runtime;
1538 remove_wait_queue(&runtime->sleep, &d->wait);
1539 runtime->stop_threshold = d->stop_threshold;
1540 }
1541
1da177e4
LT		 1542 if (drec != &drec_tmp)
1543 kfree(drec);
1da177e4 1544 snd_power_unlock(card);
1da177e4
LT		 1545
1546 return result;
1547}
1548
1549/*
1550 * drop ioctl
1551 *
1552 * Immediately put all linked substreams into SETUP state.
1553 */
877211f5 1554static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1555{
877211f5
TI		 1556 struct snd_pcm_runtime *runtime;
1557 struct snd_card *card;
1da177e4
LT		 1558 int result = 0;
1559
1560 snd_assert(substream != NULL, return -ENXIO);
1561 runtime = substream->runtime;
1562 card = substream->pcm->card;
1563
de1b8b93
TI		 1564 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1565 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1566 return -EBADFD;
1567
1568 snd_power_lock(card);
1569 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1570 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1571 if (result < 0)
1572 goto _unlock;
1573 }
1574
1575 snd_pcm_stream_lock_irq(substream);
1576 /* resume pause */
1577 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1578 snd_pcm_pause(substream, 0);
1579
1580 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1581 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1582 snd_pcm_stream_unlock_irq(substream);
1583 _unlock:
1584 snd_power_unlock(card);
1585 return result;
1586}
1587
1588
1589/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1590static struct file *snd_pcm_file_fd(int fd)
1591{
1592 struct file *file;
1593 struct inode *inode;
f87135f5
CL		 1594 unsigned int minor;
1595
1da177e4
LT		 1596 file = fget(fd);
1597 if (!file)
1598 return NULL;
7bc56323 1599 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1600 if (!S_ISCHR(inode->i_mode) ||
1601 imajor(inode) != snd_major) {
1602 fput(file);
1603 return NULL;
1604 }
1605 minor = iminor(inode);
f87135f5
CL		 1606 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1607 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1608 fput(file);
1609 return NULL;
1610 }
1611 return file;
1612}
1613
1614/*
1615 * PCM link handling
1616 */
877211f5 1617static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1618{
1619 int res = 0;
1620 struct file *file;
877211f5
TI		 1621 struct snd_pcm_file *pcm_file;
1622 struct snd_pcm_substream *substream1;
1da177e4
LT		 1623
1624 file = snd_pcm_file_fd(fd);
1625 if (!file)
1626 return -EBADFD;
1627 pcm_file = file->private_data;
1628 substream1 = pcm_file->substream;
1629 down_write(&snd_pcm_link_rwsem);
1630 write_lock_irq(&snd_pcm_link_rwlock);
1631 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1632 substream->runtime->status->state != substream1->runtime->status->state) {
1633 res = -EBADFD;
1634 goto _end;
1635 }
1636 if (snd_pcm_stream_linked(substream1)) {
1637 res = -EALREADY;
1638 goto _end;
1639 }
1640 if (!snd_pcm_stream_linked(substream)) {
877211f5 1641 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1da177e4
LT		 1642 if (substream->group == NULL) {
1643 res = -ENOMEM;
1644 goto _end;
1645 }
1646 spin_lock_init(&substream->group->lock);
1647 INIT_LIST_HEAD(&substream->group->substreams);
1648 list_add_tail(&substream->link_list, &substream->group->substreams);
1649 substream->group->count = 1;
1650 }
1651 list_add_tail(&substream1->link_list, &substream->group->substreams);
1652 substream->group->count++;
1653 substream1->group = substream->group;
1654 _end:
1655 write_unlock_irq(&snd_pcm_link_rwlock);
1656 up_write(&snd_pcm_link_rwsem);
1657 fput(file);
1658 return res;
1659}
1660
877211f5 1661static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1662{
1663 substream->group = &substream->self_group;
1664 INIT_LIST_HEAD(&substream->self_group.substreams);
1665 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1666}
1667
877211f5 1668static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1669{
ef991b95 1670 struct snd_pcm_substream *s;
1da177e4
LT		 1671 int res = 0;
1672
1673 down_write(&snd_pcm_link_rwsem);
1674 write_lock_irq(&snd_pcm_link_rwlock);
1675 if (!snd_pcm_stream_linked(substream)) {
1676 res = -EALREADY;
1677 goto _end;
1678 }
1679 list_del(&substream->link_list);
1680 substream->group->count--;
1681 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1682 snd_pcm_group_for_each_entry(s, substream) {
1683 relink_to_local(s);
1da177e4
LT		 1684 break;
1685 }
1686 kfree(substream->group);
1687 }
1688 relink_to_local(substream);
1689 _end:
1690 write_unlock_irq(&snd_pcm_link_rwlock);
1691 up_write(&snd_pcm_link_rwsem);
1692 return res;
1693}
1694
1695/*
1696 * hw configurator
1697 */
877211f5
TI		 1698static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1da177e4 1700{
877211f5 1701 struct snd_interval t;
1da177e4
LT		 1702 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1703 hw_param_interval_c(params, rule->deps[1]), &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705}
1706
877211f5
TI		 1707static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1da177e4 1709{
877211f5 1710 struct snd_interval t;
1da177e4
LT		 1711 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1712 hw_param_interval_c(params, rule->deps[1]), &t);
1713 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1714}
1715
877211f5
TI		 1716static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1717 struct snd_pcm_hw_rule *rule)
1da177e4 1718{
877211f5 1719 struct snd_interval t;
1da177e4
LT		 1720 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1721 hw_param_interval_c(params, rule->deps[1]),
1722 (unsigned long) rule->private, &t);
1723 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1724}
1725
877211f5
TI		 1726static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1727 struct snd_pcm_hw_rule *rule)
1da177e4 1728{
877211f5 1729 struct snd_interval t;
1da177e4
LT		 1730 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1731 (unsigned long) rule->private,
1732 hw_param_interval_c(params, rule->deps[1]), &t);
1733 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1734}
1735
877211f5
TI		 1736static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1737 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1738{
1739 unsigned int k;
877211f5
TI		 1740 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1741 struct snd_mask m;
1742 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1743 snd_mask_any(&m);
1744 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1745 int bits;
1746 if (! snd_mask_test(mask, k))
1747 continue;
1748 bits = snd_pcm_format_physical_width(k);
1749 if (bits <= 0)
1750 continue; /* ignore invalid formats */
1751 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1752 snd_mask_reset(&m, k);
1753 }
1754 return snd_mask_refine(mask, &m);
1755}
1756
877211f5
TI		 1757static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1758 struct snd_pcm_hw_rule *rule)
1da177e4 1759{
877211f5 1760 struct snd_interval t;
1da177e4
LT		 1761 unsigned int k;
1762 t.min = UINT_MAX;
1763 t.max = 0;
1764 t.openmin = 0;
1765 t.openmax = 0;
1766 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1767 int bits;
1768 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1769 continue;
1770 bits = snd_pcm_format_physical_width(k);
1771 if (bits <= 0)
1772 continue; /* ignore invalid formats */
1773 if (t.min > (unsigned)bits)
1774 t.min = bits;
1775 if (t.max < (unsigned)bits)
1776 t.max = bits;
1777 }
1778 t.integer = 1;
1779 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1780}
1781
1782#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1783#error "Change this table"
1784#endif
1785
1786static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1787 48000, 64000, 88200, 96000, 176400, 192000 };
1788
877211f5
TI		 1789static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1790 struct snd_pcm_hw_rule *rule)
1da177e4 1791{
877211f5 1792 struct snd_pcm_hardware *hw = rule->private;
1da177e4
LT		 1793 return snd_interval_list(hw_param_interval(params, rule->var),
1794 ARRAY_SIZE(rates), rates, hw->rates);
1795}
1796
877211f5
TI		 1797static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1798 struct snd_pcm_hw_rule *rule)
1da177e4 1799{
877211f5
TI		 1800 struct snd_interval t;
1801 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1802 t.min = 0;
1803 t.max = substream->buffer_bytes_max;
1804 t.openmin = 0;
1805 t.openmax = 0;
1806 t.integer = 1;
1807 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1808}
1809
877211f5 1810int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1811{
877211f5
TI		 1812 struct snd_pcm_runtime *runtime = substream->runtime;
1813 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1814 int k, err;
1815
1816 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1817 snd_mask_any(constrs_mask(constrs, k));
1818 }
1819
1820 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1821 snd_interval_any(constrs_interval(constrs, k));
1822 }
1823
1824 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1825 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1826 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1827 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1828 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1829
1830 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1831 snd_pcm_hw_rule_format, NULL,
1832 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1833 if (err < 0)
1834 return err;
1835 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1836 snd_pcm_hw_rule_sample_bits, NULL,
1837 SNDRV_PCM_HW_PARAM_FORMAT,
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_div, NULL,
1843 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1844 if (err < 0)
1845 return err;
1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1847 snd_pcm_hw_rule_mul, NULL,
1848 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1849 if (err < 0)
1850 return err;
1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1852 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1853 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1854 if (err < 0)
1855 return err;
1856 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1857 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1858 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1859 if (err < 0)
1860 return err;
1861 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1862 snd_pcm_hw_rule_div, NULL,
1863 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1864 if (err < 0)
1865 return err;
1866 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1867 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1868 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1869 if (err < 0)
1870 return err;
1871 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1872 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1873 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1874 if (err < 0)
1875 return err;
1876 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1877 snd_pcm_hw_rule_div, NULL,
1878 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1879 if (err < 0)
1880 return err;
1881 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1882 snd_pcm_hw_rule_div, NULL,
1883 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1884 if (err < 0)
1885 return err;
1886 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1887 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1888 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1889 if (err < 0)
1890 return err;
1891 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1892 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1893 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1894 if (err < 0)
1895 return err;
1896 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1897 snd_pcm_hw_rule_mul, NULL,
1898 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1899 if (err < 0)
1900 return err;
1901 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1902 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1903 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1904 if (err < 0)
1905 return err;
1906 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1907 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1908 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1909 if (err < 0)
1910 return err;
1911 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1912 snd_pcm_hw_rule_muldivk, (void*) 8,
1913 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1914 if (err < 0)
1915 return err;
1916 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1917 snd_pcm_hw_rule_muldivk, (void*) 8,
1918 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1919 if (err < 0)
1920 return err;
1921 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1922 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1923 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1924 if (err < 0)
1925 return err;
1926 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1927 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1928 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1929 if (err < 0)
1930 return err;
1931 return 0;
1932}
1933
877211f5 1934int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1935{
877211f5
TI		 1936 struct snd_pcm_runtime *runtime = substream->runtime;
1937 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1938 int err;
1939 unsigned int mask = 0;
1940
1941 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1942 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1943 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1944 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1945 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1946 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1947 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1948 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1949 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1950 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1951 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1952 }
1953 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1954 snd_assert(err >= 0, return -EINVAL);
1955
1956 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1957 snd_assert(err >= 0, return -EINVAL);
1958
1959 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1960 snd_assert(err >= 0, return -EINVAL);
1961
1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1963 hw->channels_min, hw->channels_max);
1964 snd_assert(err >= 0, return -EINVAL);
1965
1966 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1967 hw->rate_min, hw->rate_max);
1968 snd_assert(err >= 0, return -EINVAL);
1969
1970 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1971 hw->period_bytes_min, hw->period_bytes_max);
1972 snd_assert(err >= 0, return -EINVAL);
1973
1974 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1975 hw->periods_min, hw->periods_max);
1976 snd_assert(err >= 0, return -EINVAL);
1977
1978 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1979 hw->period_bytes_min, hw->buffer_bytes_max);
1980 snd_assert(err >= 0, return -EINVAL);
1981
1982 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1983 snd_pcm_hw_rule_buffer_bytes_max, substream,
1984 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1985 if (err < 0)
1986 return err;
1987
1988 /* FIXME: remove */
1989 if (runtime->dma_bytes) {
1990 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1991 snd_assert(err >= 0, return -EINVAL);
1992 }
1993
1994 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1995 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1996 snd_pcm_hw_rule_rate, hw,
1997 SNDRV_PCM_HW_PARAM_RATE, -1);
1998 if (err < 0)
1999 return err;
2000 }
2001
2002 /* FIXME: this belong to lowlevel */
2003 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
2004 1000000 / HZ, 1000000 / HZ);
2005 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2006
2007 return 0;
2008}
2009
3bf75f9b 2010static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2011{
1da177e4 2012 snd_pcm_unlink(substream);
3bf75f9b
TI		 2013}
2014
2015void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2016{
0df63e44
TI		 2017 substream->ref_count--;
2018 if (substream->ref_count > 0)
2019 return;
2020
3bf75f9b 2021 snd_pcm_drop(substream);
3bf75f9b 2022 if (substream->hw_opened) {
1da177e4
LT		 2023 if (substream->ops->hw_free != NULL)
2024 substream->ops->hw_free(substream);
2025 substream->ops->close(substream);
3bf75f9b 2026 substream->hw_opened = 0;
1da177e4 2027 }
1576274d
TI		 2028 if (substream->pcm_release) {
2029 substream->pcm_release(substream);
2030 substream->pcm_release = NULL;
2031 }
3bf75f9b
TI		 2032 snd_pcm_detach_substream(substream);
2033}
2034
e88e8ae6
TI		 2035EXPORT_SYMBOL(snd_pcm_release_substream);
2036
3bf75f9b
TI		 2037int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2038 struct file *file,
2039 struct snd_pcm_substream **rsubstream)
2040{
2041 struct snd_pcm_substream *substream;
2042 int err;
2043
2044 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2045 if (err < 0)
2046 return err;
0df63e44
TI		 2047 if (substream->ref_count > 1) {
2048 *rsubstream = substream;
2049 return 0;
2050 }
2051
3bf75f9b
TI		 2052 err = snd_pcm_hw_constraints_init(substream);
2053 if (err < 0) {
2054 snd_printd("snd_pcm_hw_constraints_init failed\n");
2055 goto error;
2056 }
2057
2058 if ((err = substream->ops->open(substream)) < 0)
2059 goto error;
2060
2061 substream->hw_opened = 1;
2062
2063 err = snd_pcm_hw_constraints_complete(substream);
2064 if (err < 0) {
2065 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2066 goto error;
2067 }
2068
2069 *rsubstream = substream;
1da177e4 2070 return 0;
3bf75f9b
TI		 2071
2072 error:
2073 snd_pcm_release_substream(substream);
2074 return err;
1da177e4
LT		 2075}
2076
e88e8ae6
TI		 2077EXPORT_SYMBOL(snd_pcm_open_substream);
2078
1da177e4 2079static int snd_pcm_open_file(struct file *file,
877211f5 2080 struct snd_pcm *pcm,
1da177e4 2081 int stream,
877211f5 2082 struct snd_pcm_file **rpcm_file)
1da177e4 2083{
877211f5
TI		 2084 struct snd_pcm_file *pcm_file;
2085 struct snd_pcm_substream *substream;
2086 struct snd_pcm_str *str;
3bf75f9b 2087 int err;
1da177e4
LT		 2088
2089 snd_assert(rpcm_file != NULL, return -EINVAL);
2090 *rpcm_file = NULL;
2091
3bf75f9b
TI		 2092 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2093 if (err < 0)
2094 return err;
2095
548a648b
TI		 2096 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2097 if (pcm_file == NULL) {
2098 snd_pcm_release_substream(substream);
2099 return -ENOMEM;
2100 }
2101 pcm_file->substream = substream;
2102 if (substream->ref_count == 1) {
0df63e44
TI		 2103 str = substream->pstr;
2104 substream->file = pcm_file;
2105 substream->pcm_release = pcm_release_private;
1da177e4 2106 }
1da177e4
LT		 2107 file->private_data = pcm_file;
2108 *rpcm_file = pcm_file;
2109 return 0;
2110}
2111
f87135f5
CL		 2112static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2113{
2114 struct snd_pcm *pcm;
2115
2116 pcm = snd_lookup_minor_data(iminor(inode),
2117 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2118 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2119}
2120
2121static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2122{
877211f5 2123 struct snd_pcm *pcm;
f87135f5
CL		 2124
2125 pcm = snd_lookup_minor_data(iminor(inode),
2126 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2127 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2128}
2129
2130static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2131{
2132 int err;
877211f5 2133 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2134 wait_queue_t wait;
2135
1da177e4
LT		 2136 if (pcm == NULL) {
2137 err = -ENODEV;
2138 goto __error1;
2139 }
2140 err = snd_card_file_add(pcm->card, file);
2141 if (err < 0)
2142 goto __error1;
2143 if (!try_module_get(pcm->card->module)) {
2144 err = -EFAULT;
2145 goto __error2;
2146 }
2147 init_waitqueue_entry(&wait, current);
2148 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2149 mutex_lock(&pcm->open_mutex);
1da177e4 2150 while (1) {
f87135f5 2151 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
1da177e4
LT		 2152 if (err >= 0)
2153 break;
2154 if (err == -EAGAIN) {
2155 if (file->f_flags & O_NONBLOCK) {
2156 err = -EBUSY;
2157 break;
2158 }
2159 } else
2160 break;
2161 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2162 mutex_unlock(&pcm->open_mutex);
1da177e4 2163 schedule();
1a60d4c5 2164 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2165 if (signal_pending(current)) {
2166 err = -ERESTARTSYS;
2167 break;
2168 }
2169 }
2170 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2171 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2172 if (err < 0)
2173 goto __error;
2174 return err;
2175
2176 __error:
2177 module_put(pcm->card->module);
2178 __error2:
2179 snd_card_file_remove(pcm->card, file);
2180 __error1:
2181 return err;
2182}
2183
2184static int snd_pcm_release(struct inode *inode, struct file *file)
2185{
877211f5
TI		 2186 struct snd_pcm *pcm;
2187 struct snd_pcm_substream *substream;
2188 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2189
2190 pcm_file = file->private_data;
2191 substream = pcm_file->substream;
2192 snd_assert(substream != NULL, return -ENXIO);
1da177e4 2193 pcm = substream->pcm;
1da177e4 2194 fasync_helper(-1, file, 0, &substream->runtime->fasync);
1a60d4c5 2195 mutex_lock(&pcm->open_mutex);
3bf75f9b 2196 snd_pcm_release_substream(substream);
548a648b 2197 kfree(pcm_file);
1a60d4c5 2198 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2199 wake_up(&pcm->open_wait);
2200 module_put(pcm->card->module);
2201 snd_card_file_remove(pcm->card, file);
2202 return 0;
2203}
2204
877211f5
TI		 2205static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2206 snd_pcm_uframes_t frames)
1da177e4 2207{
877211f5 2208 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2209 snd_pcm_sframes_t appl_ptr;
2210 snd_pcm_sframes_t ret;
2211 snd_pcm_sframes_t hw_avail;
2212
2213 if (frames == 0)
2214 return 0;
2215
2216 snd_pcm_stream_lock_irq(substream);
2217 switch (runtime->status->state) {
2218 case SNDRV_PCM_STATE_PREPARED:
2219 break;
2220 case SNDRV_PCM_STATE_DRAINING:
2221 case SNDRV_PCM_STATE_RUNNING:
2222 if (snd_pcm_update_hw_ptr(substream) >= 0)
2223 break;
2224 /* Fall through */
2225 case SNDRV_PCM_STATE_XRUN:
2226 ret = -EPIPE;
2227 goto __end;
2228 default:
2229 ret = -EBADFD;
2230 goto __end;
2231 }
2232
2233 hw_avail = snd_pcm_playback_hw_avail(runtime);
2234 if (hw_avail <= 0) {
2235 ret = 0;
2236 goto __end;
2237 }
2238 if (frames > (snd_pcm_uframes_t)hw_avail)
2239 frames = hw_avail;
2240 else
2241 frames -= frames % runtime->xfer_align;
2242 appl_ptr = runtime->control->appl_ptr - frames;
2243 if (appl_ptr < 0)
2244 appl_ptr += runtime->boundary;
2245 runtime->control->appl_ptr = appl_ptr;
2246 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2247 runtime->sleep_min)
2248 snd_pcm_tick_prepare(substream);
2249 ret = frames;
2250 __end:
2251 snd_pcm_stream_unlock_irq(substream);
2252 return ret;
2253}
2254
877211f5
TI		 2255static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2256 snd_pcm_uframes_t frames)
1da177e4 2257{
877211f5 2258 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2259 snd_pcm_sframes_t appl_ptr;
2260 snd_pcm_sframes_t ret;
2261 snd_pcm_sframes_t hw_avail;
2262
2263 if (frames == 0)
2264 return 0;
2265
2266 snd_pcm_stream_lock_irq(substream);
2267 switch (runtime->status->state) {
2268 case SNDRV_PCM_STATE_PREPARED:
2269 case SNDRV_PCM_STATE_DRAINING:
2270 break;
2271 case SNDRV_PCM_STATE_RUNNING:
2272 if (snd_pcm_update_hw_ptr(substream) >= 0)
2273 break;
2274 /* Fall through */
2275 case SNDRV_PCM_STATE_XRUN:
2276 ret = -EPIPE;
2277 goto __end;
2278 default:
2279 ret = -EBADFD;
2280 goto __end;
2281 }
2282
2283 hw_avail = snd_pcm_capture_hw_avail(runtime);
2284 if (hw_avail <= 0) {
2285 ret = 0;
2286 goto __end;
2287 }
2288 if (frames > (snd_pcm_uframes_t)hw_avail)
2289 frames = hw_avail;
2290 else
2291 frames -= frames % runtime->xfer_align;
2292 appl_ptr = runtime->control->appl_ptr - frames;
2293 if (appl_ptr < 0)
2294 appl_ptr += runtime->boundary;
2295 runtime->control->appl_ptr = appl_ptr;
2296 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2297 runtime->sleep_min)
2298 snd_pcm_tick_prepare(substream);
2299 ret = frames;
2300 __end:
2301 snd_pcm_stream_unlock_irq(substream);
2302 return ret;
2303}
2304
877211f5
TI		 2305static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2306 snd_pcm_uframes_t frames)
1da177e4 2307{
877211f5 2308 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2309 snd_pcm_sframes_t appl_ptr;
2310 snd_pcm_sframes_t ret;
2311 snd_pcm_sframes_t avail;
2312
2313 if (frames == 0)
2314 return 0;
2315
2316 snd_pcm_stream_lock_irq(substream);
2317 switch (runtime->status->state) {
2318 case SNDRV_PCM_STATE_PREPARED:
2319 case SNDRV_PCM_STATE_PAUSED:
2320 break;
2321 case SNDRV_PCM_STATE_DRAINING:
2322 case SNDRV_PCM_STATE_RUNNING:
2323 if (snd_pcm_update_hw_ptr(substream) >= 0)
2324 break;
2325 /* Fall through */
2326 case SNDRV_PCM_STATE_XRUN:
2327 ret = -EPIPE;
2328 goto __end;
2329 default:
2330 ret = -EBADFD;
2331 goto __end;
2332 }
2333
2334 avail = snd_pcm_playback_avail(runtime);
2335 if (avail <= 0) {
2336 ret = 0;
2337 goto __end;
2338 }
2339 if (frames > (snd_pcm_uframes_t)avail)
2340 frames = avail;
2341 else
2342 frames -= frames % runtime->xfer_align;
2343 appl_ptr = runtime->control->appl_ptr + frames;
2344 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2345 appl_ptr -= runtime->boundary;
2346 runtime->control->appl_ptr = appl_ptr;
2347 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2348 runtime->sleep_min)
2349 snd_pcm_tick_prepare(substream);
2350 ret = frames;
2351 __end:
2352 snd_pcm_stream_unlock_irq(substream);
2353 return ret;
2354}
2355
877211f5
TI		 2356static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2357 snd_pcm_uframes_t frames)
1da177e4 2358{
877211f5 2359 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2360 snd_pcm_sframes_t appl_ptr;
2361 snd_pcm_sframes_t ret;
2362 snd_pcm_sframes_t avail;
2363
2364 if (frames == 0)
2365 return 0;
2366
2367 snd_pcm_stream_lock_irq(substream);
2368 switch (runtime->status->state) {
2369 case SNDRV_PCM_STATE_PREPARED:
2370 case SNDRV_PCM_STATE_DRAINING:
2371 case SNDRV_PCM_STATE_PAUSED:
2372 break;
2373 case SNDRV_PCM_STATE_RUNNING:
2374 if (snd_pcm_update_hw_ptr(substream) >= 0)
2375 break;
2376 /* Fall through */
2377 case SNDRV_PCM_STATE_XRUN:
2378 ret = -EPIPE;
2379 goto __end;
2380 default:
2381 ret = -EBADFD;
2382 goto __end;
2383 }
2384
2385 avail = snd_pcm_capture_avail(runtime);
2386 if (avail <= 0) {
2387 ret = 0;
2388 goto __end;
2389 }
2390 if (frames > (snd_pcm_uframes_t)avail)
2391 frames = avail;
2392 else
2393 frames -= frames % runtime->xfer_align;
2394 appl_ptr = runtime->control->appl_ptr + frames;
2395 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2396 appl_ptr -= runtime->boundary;
2397 runtime->control->appl_ptr = appl_ptr;
2398 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2399 runtime->sleep_min)
2400 snd_pcm_tick_prepare(substream);
2401 ret = frames;
2402 __end:
2403 snd_pcm_stream_unlock_irq(substream);
2404 return ret;
2405}
2406
877211f5 2407static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2408{
877211f5 2409 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2410 int err;
2411
2412 snd_pcm_stream_lock_irq(substream);
2413 switch (runtime->status->state) {
2414 case SNDRV_PCM_STATE_DRAINING:
2415 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2416 goto __badfd;
2417 case SNDRV_PCM_STATE_RUNNING:
2418 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2419 break;
2420 /* Fall through */
2421 case SNDRV_PCM_STATE_PREPARED:
2422 case SNDRV_PCM_STATE_SUSPENDED:
2423 err = 0;
2424 break;
2425 case SNDRV_PCM_STATE_XRUN:
2426 err = -EPIPE;
2427 break;
2428 default:
2429 __badfd:
2430 err = -EBADFD;
2431 break;
2432 }
2433 snd_pcm_stream_unlock_irq(substream);
2434 return err;
2435}
2436
877211f5
TI		 2437static int snd_pcm_delay(struct snd_pcm_substream *substream,
2438 snd_pcm_sframes_t __user *res)
1da177e4 2439{
877211f5 2440 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2441 int err;
2442 snd_pcm_sframes_t n = 0;
2443
2444 snd_pcm_stream_lock_irq(substream);
2445 switch (runtime->status->state) {
2446 case SNDRV_PCM_STATE_DRAINING:
2447 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2448 goto __badfd;
2449 case SNDRV_PCM_STATE_RUNNING:
2450 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2451 break;
2452 /* Fall through */
2453 case SNDRV_PCM_STATE_PREPARED:
2454 case SNDRV_PCM_STATE_SUSPENDED:
2455 err = 0;
2456 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2457 n = snd_pcm_playback_hw_avail(runtime);
2458 else
2459 n = snd_pcm_capture_avail(runtime);
2460 break;
2461 case SNDRV_PCM_STATE_XRUN:
2462 err = -EPIPE;
2463 break;
2464 default:
2465 __badfd:
2466 err = -EBADFD;
2467 break;
2468 }
2469 snd_pcm_stream_unlock_irq(substream);
2470 if (!err)
2471 if (put_user(n, res))
2472 err = -EFAULT;
2473 return err;
2474}
2475
877211f5
TI		 2476static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2477 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2478{
877211f5
TI		 2479 struct snd_pcm_runtime *runtime = substream->runtime;
2480 struct snd_pcm_sync_ptr sync_ptr;
2481 volatile struct snd_pcm_mmap_status *status;
2482 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2483 int err;
2484
2485 memset(&sync_ptr, 0, sizeof(sync_ptr));
2486 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2487 return -EFAULT;
877211f5 2488 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2489 return -EFAULT;
2490 status = runtime->status;
2491 control = runtime->control;
2492 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2493 err = snd_pcm_hwsync(substream);
2494 if (err < 0)
2495 return err;
2496 }
2497 snd_pcm_stream_lock_irq(substream);
2498 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2499 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2500 else
2501 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2502 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2503 control->avail_min = sync_ptr.c.control.avail_min;
2504 else
2505 sync_ptr.c.control.avail_min = control->avail_min;
2506 sync_ptr.s.status.state = status->state;
2507 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2508 sync_ptr.s.status.tstamp = status->tstamp;
2509 sync_ptr.s.status.suspended_state = status->suspended_state;
2510 snd_pcm_stream_unlock_irq(substream);
2511 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2512 return -EFAULT;
2513 return 0;
2514}
2515
0df63e44
TI		 2516static int snd_pcm_common_ioctl1(struct file *file,
2517 struct snd_pcm_substream *substream,
1da177e4
LT		 2518 unsigned int cmd, void __user *arg)
2519{
2520 snd_assert(substream != NULL, return -ENXIO);
2521
2522 switch (cmd) {
2523 case SNDRV_PCM_IOCTL_PVERSION:
2524 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2525 case SNDRV_PCM_IOCTL_INFO:
2526 return snd_pcm_info_user(substream, arg);
07799e75 2527 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
1da177e4 2528 return 0;
1da177e4
LT		 2529 case SNDRV_PCM_IOCTL_HW_REFINE:
2530 return snd_pcm_hw_refine_user(substream, arg);
2531 case SNDRV_PCM_IOCTL_HW_PARAMS:
2532 return snd_pcm_hw_params_user(substream, arg);
2533 case SNDRV_PCM_IOCTL_HW_FREE:
2534 return snd_pcm_hw_free(substream);
2535 case SNDRV_PCM_IOCTL_SW_PARAMS:
2536 return snd_pcm_sw_params_user(substream, arg);
2537 case SNDRV_PCM_IOCTL_STATUS:
2538 return snd_pcm_status_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2540 return snd_pcm_channel_info_user(substream, arg);
2541 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2542 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2543 case SNDRV_PCM_IOCTL_RESET:
2544 return snd_pcm_reset(substream);
2545 case SNDRV_PCM_IOCTL_START:
2546 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2547 case SNDRV_PCM_IOCTL_LINK:
2548 return snd_pcm_link(substream, (int)(unsigned long) arg);
2549 case SNDRV_PCM_IOCTL_UNLINK:
2550 return snd_pcm_unlink(substream);
2551 case SNDRV_PCM_IOCTL_RESUME:
2552 return snd_pcm_resume(substream);
2553 case SNDRV_PCM_IOCTL_XRUN:
2554 return snd_pcm_xrun(substream);
2555 case SNDRV_PCM_IOCTL_HWSYNC:
2556 return snd_pcm_hwsync(substream);
2557 case SNDRV_PCM_IOCTL_DELAY:
2558 return snd_pcm_delay(substream, arg);
2559 case SNDRV_PCM_IOCTL_SYNC_PTR:
2560 return snd_pcm_sync_ptr(substream, arg);
59d48582 2561#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2562 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2563 return snd_pcm_hw_refine_old_user(substream, arg);
2564 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2565 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2566#endif
1da177e4
LT		 2567 case SNDRV_PCM_IOCTL_DRAIN:
2568 return snd_pcm_drain(substream);
2569 case SNDRV_PCM_IOCTL_DROP:
2570 return snd_pcm_drop(substream);
e661d0dd
TI		 2571 case SNDRV_PCM_IOCTL_PAUSE:
2572 {
2573 int res;
2574 snd_pcm_stream_lock_irq(substream);
2575 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2576 snd_pcm_stream_unlock_irq(substream);
2577 return res;
2578 }
1da177e4
LT		 2579 }
2580 snd_printd("unknown ioctl = 0x%x\n", cmd);
2581 return -ENOTTY;
2582}
2583
0df63e44
TI		 2584static int snd_pcm_playback_ioctl1(struct file *file,
2585 struct snd_pcm_substream *substream,
1da177e4
LT		 2586 unsigned int cmd, void __user *arg)
2587{
2588 snd_assert(substream != NULL, return -ENXIO);
2589 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2590 switch (cmd) {
2591 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2592 {
877211f5
TI		 2593 struct snd_xferi xferi;
2594 struct snd_xferi __user *_xferi = arg;
2595 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2596 snd_pcm_sframes_t result;
2597 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2598 return -EBADFD;
2599 if (put_user(0, &_xferi->result))
2600 return -EFAULT;
2601 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2602 return -EFAULT;
2603 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2604 __put_user(result, &_xferi->result);
2605 return result < 0 ? result : 0;
2606 }
2607 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2608 {
877211f5
TI		 2609 struct snd_xfern xfern;
2610 struct snd_xfern __user *_xfern = arg;
2611 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2612 void __user **bufs;
2613 snd_pcm_sframes_t result;
2614 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2615 return -EBADFD;
2616 if (runtime->channels > 128)
2617 return -EINVAL;
2618 if (put_user(0, &_xfern->result))
2619 return -EFAULT;
2620 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2621 return -EFAULT;
2622 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2623 if (bufs == NULL)
2624 return -ENOMEM;
2625 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2626 kfree(bufs);
2627 return -EFAULT;
2628 }
2629 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2630 kfree(bufs);
2631 __put_user(result, &_xfern->result);
2632 return result < 0 ? result : 0;
2633 }
2634 case SNDRV_PCM_IOCTL_REWIND:
2635 {
2636 snd_pcm_uframes_t frames;
2637 snd_pcm_uframes_t __user *_frames = arg;
2638 snd_pcm_sframes_t result;
2639 if (get_user(frames, _frames))
2640 return -EFAULT;
2641 if (put_user(0, _frames))
2642 return -EFAULT;
2643 result = snd_pcm_playback_rewind(substream, frames);
2644 __put_user(result, _frames);
2645 return result < 0 ? result : 0;
2646 }
2647 case SNDRV_PCM_IOCTL_FORWARD:
2648 {
2649 snd_pcm_uframes_t frames;
2650 snd_pcm_uframes_t __user *_frames = arg;
2651 snd_pcm_sframes_t result;
2652 if (get_user(frames, _frames))
2653 return -EFAULT;
2654 if (put_user(0, _frames))
2655 return -EFAULT;
2656 result = snd_pcm_playback_forward(substream, frames);
2657 __put_user(result, _frames);
2658 return result < 0 ? result : 0;
2659 }
1da177e4 2660 }
0df63e44 2661 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2662}
2663
0df63e44
TI		 2664static int snd_pcm_capture_ioctl1(struct file *file,
2665 struct snd_pcm_substream *substream,
1da177e4
LT		 2666 unsigned int cmd, void __user *arg)
2667{
2668 snd_assert(substream != NULL, return -ENXIO);
2669 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2670 switch (cmd) {
2671 case SNDRV_PCM_IOCTL_READI_FRAMES:
2672 {
877211f5
TI		 2673 struct snd_xferi xferi;
2674 struct snd_xferi __user *_xferi = arg;
2675 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2676 snd_pcm_sframes_t result;
2677 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2678 return -EBADFD;
2679 if (put_user(0, &_xferi->result))
2680 return -EFAULT;
2681 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2682 return -EFAULT;
2683 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2684 __put_user(result, &_xferi->result);
2685 return result < 0 ? result : 0;
2686 }
2687 case SNDRV_PCM_IOCTL_READN_FRAMES:
2688 {
877211f5
TI		 2689 struct snd_xfern xfern;
2690 struct snd_xfern __user *_xfern = arg;
2691 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2692 void *bufs;
2693 snd_pcm_sframes_t result;
2694 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2695 return -EBADFD;
2696 if (runtime->channels > 128)
2697 return -EINVAL;
2698 if (put_user(0, &_xfern->result))
2699 return -EFAULT;
2700 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2701 return -EFAULT;
2702 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2703 if (bufs == NULL)
2704 return -ENOMEM;
2705 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2706 kfree(bufs);
2707 return -EFAULT;
2708 }
2709 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2710 kfree(bufs);
2711 __put_user(result, &_xfern->result);
2712 return result < 0 ? result : 0;
2713 }
2714 case SNDRV_PCM_IOCTL_REWIND:
2715 {
2716 snd_pcm_uframes_t frames;
2717 snd_pcm_uframes_t __user *_frames = arg;
2718 snd_pcm_sframes_t result;
2719 if (get_user(frames, _frames))
2720 return -EFAULT;
2721 if (put_user(0, _frames))
2722 return -EFAULT;
2723 result = snd_pcm_capture_rewind(substream, frames);
2724 __put_user(result, _frames);
2725 return result < 0 ? result : 0;
2726 }
2727 case SNDRV_PCM_IOCTL_FORWARD:
2728 {
2729 snd_pcm_uframes_t frames;
2730 snd_pcm_uframes_t __user *_frames = arg;
2731 snd_pcm_sframes_t result;
2732 if (get_user(frames, _frames))
2733 return -EFAULT;
2734 if (put_user(0, _frames))
2735 return -EFAULT;
2736 result = snd_pcm_capture_forward(substream, frames);
2737 __put_user(result, _frames);
2738 return result < 0 ? result : 0;
2739 }
2740 }
0df63e44 2741 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2742}
2743
877211f5
TI		 2744static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2745 unsigned long arg)
1da177e4 2746{
877211f5 2747 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2748
2749 pcm_file = file->private_data;
2750
2751 if (((cmd >> 8) & 0xff) != 'A')
2752 return -ENOTTY;
2753
0df63e44
TI		 2754 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2755 (void __user *)arg);
1da177e4
LT		 2756}
2757
877211f5
TI		 2758static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2759 unsigned long arg)
1da177e4 2760{
877211f5 2761 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2762
2763 pcm_file = file->private_data;
2764
2765 if (((cmd >> 8) & 0xff) != 'A')
2766 return -ENOTTY;
2767
0df63e44
TI		 2768 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2769 (void __user *)arg);
1da177e4
LT		 2770}
2771
bf1bbb5a
TI		 2772int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2773 unsigned int cmd, void *arg)
1da177e4
LT		 2774{
2775 mm_segment_t fs;
2776 int result;
2777
2778 fs = snd_enter_user();
1da177e4
LT		 2779 switch (substream->stream) {
2780 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2781 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2782 (void __user *)arg);
bf1bbb5a 2783 break;
1da177e4 2784 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2785 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2786 (void __user *)arg);
bf1bbb5a 2787 break;
1da177e4 2788 default:
bf1bbb5a
TI		 2789 result = -EINVAL;
2790 break;
1da177e4 2791 }
bf1bbb5a
TI		 2792 snd_leave_user(fs);
2793 return result;
1da177e4
LT		 2794}
2795
e88e8ae6
TI		 2796EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2797
877211f5
TI		 2798static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2799 loff_t * offset)
1da177e4 2800{
877211f5
TI		 2801 struct snd_pcm_file *pcm_file;
2802 struct snd_pcm_substream *substream;
2803 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2804 snd_pcm_sframes_t result;
2805
2806 pcm_file = file->private_data;
2807 substream = pcm_file->substream;
2808 snd_assert(substream != NULL, return -ENXIO);
2809 runtime = substream->runtime;
2810 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2811 return -EBADFD;
2812 if (!frame_aligned(runtime, count))
2813 return -EINVAL;
2814 count = bytes_to_frames(runtime, count);
2815 result = snd_pcm_lib_read(substream, buf, count);
2816 if (result > 0)
2817 result = frames_to_bytes(runtime, result);
2818 return result;
2819}
2820
877211f5
TI		 2821static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2822 size_t count, loff_t * offset)
1da177e4 2823{
877211f5
TI		 2824 struct snd_pcm_file *pcm_file;
2825 struct snd_pcm_substream *substream;
2826 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2827 snd_pcm_sframes_t result;
2828
2829 pcm_file = file->private_data;
2830 substream = pcm_file->substream;
2831 snd_assert(substream != NULL, result = -ENXIO; goto end);
2832 runtime = substream->runtime;
2833 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2834 result = -EBADFD;
2835 goto end;
2836 }
2837 if (!frame_aligned(runtime, count)) {
2838 result = -EINVAL;
2839 goto end;
2840 }
2841 count = bytes_to_frames(runtime, count);
2842 result = snd_pcm_lib_write(substream, buf, count);
2843 if (result > 0)
2844 result = frames_to_bytes(runtime, result);
2845 end:
2846 return result;
2847}
2848
ee0b3e67
BP		 2849static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2850 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2851
2852{
877211f5
TI		 2853 struct snd_pcm_file *pcm_file;
2854 struct snd_pcm_substream *substream;
2855 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2856 snd_pcm_sframes_t result;
2857 unsigned long i;
2858 void __user **bufs;
2859 snd_pcm_uframes_t frames;
2860
ee0b3e67 2861 pcm_file = iocb->ki_filp->private_data;
1da177e4
LT		 2862 substream = pcm_file->substream;
2863 snd_assert(substream != NULL, return -ENXIO);
2864 runtime = substream->runtime;
2865 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2866 return -EBADFD;
ee0b3e67 2867 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2868 return -EINVAL;
ee0b3e67 2869 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2870 return -EINVAL;
ee0b3e67
BP		 2871 frames = bytes_to_samples(runtime, iov->iov_len);
2872 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2873 if (bufs == NULL)
2874 return -ENOMEM;
ee0b3e67
BP		 2875 for (i = 0; i < nr_segs; ++i)
2876 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2877 result = snd_pcm_lib_readv(substream, bufs, frames);
2878 if (result > 0)
2879 result = frames_to_bytes(runtime, result);
2880 kfree(bufs);
2881 return result;
2882}
2883
ee0b3e67
BP		 2884static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2885 unsigned long nr_segs, loff_t pos)
1da177e4 2886{
877211f5
TI		 2887 struct snd_pcm_file *pcm_file;
2888 struct snd_pcm_substream *substream;
2889 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2890 snd_pcm_sframes_t result;
2891 unsigned long i;
2892 void __user **bufs;
2893 snd_pcm_uframes_t frames;
2894
ee0b3e67 2895 pcm_file = iocb->ki_filp->private_data;
1da177e4
LT		 2896 substream = pcm_file->substream;
2897 snd_assert(substream != NULL, result = -ENXIO; goto end);
2898 runtime = substream->runtime;
2899 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2900 result = -EBADFD;
2901 goto end;
2902 }
ee0b3e67
BP		 2903 if (nr_segs > 128 || nr_segs != runtime->channels ||
2904 !frame_aligned(runtime, iov->iov_len)) {
1da177e4
LT		 2905 result = -EINVAL;
2906 goto end;
2907 }
ee0b3e67
BP		 2908 frames = bytes_to_samples(runtime, iov->iov_len);
2909 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2910 if (bufs == NULL)
2911 return -ENOMEM;
ee0b3e67
BP		 2912 for (i = 0; i < nr_segs; ++i)
2913 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2914 result = snd_pcm_lib_writev(substream, bufs, frames);
2915 if (result > 0)
2916 result = frames_to_bytes(runtime, result);
2917 kfree(bufs);
2918 end:
2919 return result;
2920}
2921
2922static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2923{
877211f5
TI		 2924 struct snd_pcm_file *pcm_file;
2925 struct snd_pcm_substream *substream;
2926 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2927 unsigned int mask;
2928 snd_pcm_uframes_t avail;
2929
2930 pcm_file = file->private_data;
2931
2932 substream = pcm_file->substream;
2933 snd_assert(substream != NULL, return -ENXIO);
2934 runtime = substream->runtime;
2935
2936 poll_wait(file, &runtime->sleep, wait);
2937
2938 snd_pcm_stream_lock_irq(substream);
2939 avail = snd_pcm_playback_avail(runtime);
2940 switch (runtime->status->state) {
2941 case SNDRV_PCM_STATE_RUNNING:
2942 case SNDRV_PCM_STATE_PREPARED:
2943 case SNDRV_PCM_STATE_PAUSED:
2944 if (avail >= runtime->control->avail_min) {
2945 mask = POLLOUT | POLLWRNORM;
2946 break;
2947 }
2948 /* Fall through */
2949 case SNDRV_PCM_STATE_DRAINING:
2950 mask = 0;
2951 break;
2952 default:
2953 mask = POLLOUT | POLLWRNORM | POLLERR;
2954 break;
2955 }
2956 snd_pcm_stream_unlock_irq(substream);
2957 return mask;
2958}
2959
2960static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2961{
877211f5
TI		 2962 struct snd_pcm_file *pcm_file;
2963 struct snd_pcm_substream *substream;
2964 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2965 unsigned int mask;
2966 snd_pcm_uframes_t avail;
2967
2968 pcm_file = file->private_data;
2969
2970 substream = pcm_file->substream;
2971 snd_assert(substream != NULL, return -ENXIO);
2972 runtime = substream->runtime;
2973
2974 poll_wait(file, &runtime->sleep, wait);
2975
2976 snd_pcm_stream_lock_irq(substream);
2977 avail = snd_pcm_capture_avail(runtime);
2978 switch (runtime->status->state) {
2979 case SNDRV_PCM_STATE_RUNNING:
2980 case SNDRV_PCM_STATE_PREPARED:
2981 case SNDRV_PCM_STATE_PAUSED:
2982 if (avail >= runtime->control->avail_min) {
2983 mask = POLLIN | POLLRDNORM;
2984 break;
2985 }
2986 mask = 0;
2987 break;
2988 case SNDRV_PCM_STATE_DRAINING:
2989 if (avail > 0) {
2990 mask = POLLIN | POLLRDNORM;
2991 break;
2992 }
2993 /* Fall through */
2994 default:
2995 mask = POLLIN | POLLRDNORM | POLLERR;
2996 break;
2997 }
2998 snd_pcm_stream_unlock_irq(substream);
2999 return mask;
3000}
3001
3002/*
3003 * mmap support
3004 */
3005
3006/*
3007 * Only on coherent architectures, we can mmap the status and the control records
3008 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3009 */
3010#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3011/*
3012 * mmap status record
3013 */
877211f5
TI		 3014static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3015 unsigned long address, int *type)
1da177e4 3016{
877211f5
TI		 3017 struct snd_pcm_substream *substream = area->vm_private_data;
3018 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3019 struct page * page;
3020
3021 if (substream == NULL)
cd54e7e5 3022 return NOPAGE_SIGBUS;
1da177e4
LT		 3023 runtime = substream->runtime;
3024 page = virt_to_page(runtime->status);
b5810039 3025 get_page(page);
1da177e4
LT		 3026 if (type)
3027 *type = VM_FAULT_MINOR;
3028 return page;
3029}
3030
3031static struct vm_operations_struct snd_pcm_vm_ops_status =
3032{
3033 .nopage = snd_pcm_mmap_status_nopage,
3034};
3035
877211f5 3036static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3037 struct vm_area_struct *area)
3038{
877211f5 3039 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3040 long size;
3041 if (!(area->vm_flags & VM_READ))
3042 return -EINVAL;
3043 runtime = substream->runtime;
3044 snd_assert(runtime != NULL, return -EAGAIN);
3045 size = area->vm_end - area->vm_start;
877211f5 3046 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3047 return -EINVAL;
3048 area->vm_ops = &snd_pcm_vm_ops_status;
3049 area->vm_private_data = substream;
3050 area->vm_flags |= VM_RESERVED;
3051 return 0;
3052}
3053
3054/*
3055 * mmap control record
3056 */
877211f5
TI		 3057static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3058 unsigned long address, int *type)
1da177e4 3059{
877211f5
TI		 3060 struct snd_pcm_substream *substream = area->vm_private_data;
3061 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3062 struct page * page;
3063
3064 if (substream == NULL)
cd54e7e5 3065 return NOPAGE_SIGBUS;
1da177e4
LT		 3066 runtime = substream->runtime;
3067 page = virt_to_page(runtime->control);
b5810039 3068 get_page(page);
1da177e4
LT		 3069 if (type)
3070 *type = VM_FAULT_MINOR;
3071 return page;
3072}
3073
3074static struct vm_operations_struct snd_pcm_vm_ops_control =
3075{
3076 .nopage = snd_pcm_mmap_control_nopage,
3077};
3078
877211f5 3079static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3080 struct vm_area_struct *area)
3081{
877211f5 3082 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3083 long size;
3084 if (!(area->vm_flags & VM_READ))
3085 return -EINVAL;
3086 runtime = substream->runtime;
3087 snd_assert(runtime != NULL, return -EAGAIN);
3088 size = area->vm_end - area->vm_start;
877211f5 3089 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3090 return -EINVAL;
3091 area->vm_ops = &snd_pcm_vm_ops_control;
3092 area->vm_private_data = substream;
3093 area->vm_flags |= VM_RESERVED;
3094 return 0;
3095}
3096#else /* ! coherent mmap */
3097/*
3098 * don't support mmap for status and control records.
3099 */
877211f5 3100static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3101 struct vm_area_struct *area)
3102{
3103 return -ENXIO;
3104}
877211f5 3105static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3106 struct vm_area_struct *area)
3107{
3108 return -ENXIO;
3109}
3110#endif /* coherent mmap */
3111
3112/*
3113 * nopage callback for mmapping a RAM page
3114 */
877211f5
TI		 3115static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3116 unsigned long address, int *type)
1da177e4 3117{
877211f5
TI		 3118 struct snd_pcm_substream *substream = area->vm_private_data;
3119 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3120 unsigned long offset;
3121 struct page * page;
3122 void *vaddr;
3123 size_t dma_bytes;
3124
3125 if (substream == NULL)
cd54e7e5 3126 return NOPAGE_SIGBUS;
1da177e4
LT		 3127 runtime = substream->runtime;
3128 offset = area->vm_pgoff << PAGE_SHIFT;
3129 offset += address - area->vm_start;
cd54e7e5 3130 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_SIGBUS);
1da177e4
LT		 3131 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3132 if (offset > dma_bytes - PAGE_SIZE)
3133 return NOPAGE_SIGBUS;
3134 if (substream->ops->page) {
3135 page = substream->ops->page(substream, offset);
3136 if (! page)
cd54e7e5 3137 return NOPAGE_OOM; /* XXX: is this really due to OOM? */
1da177e4
LT		 3138 } else {
3139 vaddr = runtime->dma_area + offset;
3140 page = virt_to_page(vaddr);
3141 }
b5810039 3142 get_page(page);
1da177e4
LT		 3143 if (type)
3144 *type = VM_FAULT_MINOR;
3145 return page;
3146}
3147
3148static struct vm_operations_struct snd_pcm_vm_ops_data =
3149{
3150 .open = snd_pcm_mmap_data_open,
3151 .close = snd_pcm_mmap_data_close,
3152 .nopage = snd_pcm_mmap_data_nopage,
3153};
3154
3155/*
3156 * mmap the DMA buffer on RAM
3157 */
877211f5
TI		 3158static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3159 struct vm_area_struct *area)
1da177e4
LT		 3160{
3161 area->vm_ops = &snd_pcm_vm_ops_data;
3162 area->vm_private_data = substream;
3163 area->vm_flags |= VM_RESERVED;
9c323fcb 3164 atomic_inc(&substream->mmap_count);
1da177e4
LT		 3165 return 0;
3166}
3167
3168/*
3169 * mmap the DMA buffer on I/O memory area
3170 */
3171#if SNDRV_PCM_INFO_MMAP_IOMEM
3172static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3173{
3174 .open = snd_pcm_mmap_data_open,
3175 .close = snd_pcm_mmap_data_close,
3176};
3177
877211f5
TI		 3178int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3179 struct vm_area_struct *area)
1da177e4
LT		 3180{
3181 long size;
3182 unsigned long offset;
3183
3184#ifdef pgprot_noncached
3185 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3186#endif
3187 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3188 area->vm_private_data = substream;
3189 area->vm_flags |= VM_IO;
3190 size = area->vm_end - area->vm_start;
3191 offset = area->vm_pgoff << PAGE_SHIFT;
3192 if (io_remap_pfn_range(area, area->vm_start,
3193 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3194 size, area->vm_page_prot))
3195 return -EAGAIN;
9c323fcb 3196 atomic_inc(&substream->mmap_count);
1da177e4
LT		 3197 return 0;
3198}
e88e8ae6
TI		 3199
3200EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3201#endif /* SNDRV_PCM_INFO_MMAP */
3202
3203/*
3204 * mmap DMA buffer
3205 */
877211f5 3206int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3207 struct vm_area_struct *area)
3208{
877211f5 3209 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3210 long size;
3211 unsigned long offset;
3212 size_t dma_bytes;
3213
3214 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3215 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3216 return -EINVAL;
3217 } else {
3218 if (!(area->vm_flags & VM_READ))
3219 return -EINVAL;
3220 }
3221 runtime = substream->runtime;
3222 snd_assert(runtime != NULL, return -EAGAIN);
3223 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3224 return -EBADFD;
3225 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3226 return -ENXIO;
3227 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3228 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3229 return -EINVAL;
3230 size = area->vm_end - area->vm_start;
3231 offset = area->vm_pgoff << PAGE_SHIFT;
3232 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3233 if ((size_t)size > dma_bytes)
3234 return -EINVAL;
3235 if (offset > dma_bytes - size)
3236 return -EINVAL;
3237
3238 if (substream->ops->mmap)
3239 return substream->ops->mmap(substream, area);
3240 else
3241 return snd_pcm_default_mmap(substream, area);
3242}
3243
e88e8ae6
TI		 3244EXPORT_SYMBOL(snd_pcm_mmap_data);
3245
1da177e4
LT		 3246static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3247{
877211f5
TI		 3248 struct snd_pcm_file * pcm_file;
3249 struct snd_pcm_substream *substream;
1da177e4
LT		 3250 unsigned long offset;
3251
3252 pcm_file = file->private_data;
3253 substream = pcm_file->substream;
3254 snd_assert(substream != NULL, return -ENXIO);
3255
3256 offset = area->vm_pgoff << PAGE_SHIFT;
3257 switch (offset) {
3258 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3259 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3260 return -ENXIO;
3261 return snd_pcm_mmap_status(substream, file, area);
3262 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3263 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3264 return -ENXIO;
3265 return snd_pcm_mmap_control(substream, file, area);
3266 default:
3267 return snd_pcm_mmap_data(substream, file, area);
3268 }
3269 return 0;
3270}
3271
3272static int snd_pcm_fasync(int fd, struct file * file, int on)
3273{
877211f5
TI		 3274 struct snd_pcm_file * pcm_file;
3275 struct snd_pcm_substream *substream;
3276 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3277 int err;
3278
3279 pcm_file = file->private_data;
3280 substream = pcm_file->substream;
3281 snd_assert(substream != NULL, return -ENXIO);
3282 runtime = substream->runtime;
3283
3284 err = fasync_helper(fd, file, on, &runtime->fasync);
3285 if (err < 0)
3286 return err;
3287 return 0;
3288}
3289
3290/*
3291 * ioctl32 compat
3292 */
3293#ifdef CONFIG_COMPAT
3294#include "pcm_compat.c"
3295#else
3296#define snd_pcm_ioctl_compat NULL
3297#endif
3298
3299/*
3300 * To be removed helpers to keep binary compatibility
3301 */
3302
59d48582 3303#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3304#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3305#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3306
877211f5
TI		 3307static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3308 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3309{
3310 unsigned int i;
3311
3312 memset(params, 0, sizeof(*params));
3313 params->flags = oparams->flags;
3314 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3315 params->masks[i].bits[0] = oparams->masks[i];
3316 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3317 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3318 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3319 params->info = oparams->info;
3320 params->msbits = oparams->msbits;
3321 params->rate_num = oparams->rate_num;
3322 params->rate_den = oparams->rate_den;
3323 params->fifo_size = oparams->fifo_size;
3324}
3325
877211f5
TI		 3326static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3327 struct snd_pcm_hw_params *params)
1da177e4
LT		 3328{
3329 unsigned int i;
3330
3331 memset(oparams, 0, sizeof(*oparams));
3332 oparams->flags = params->flags;
3333 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3334 oparams->masks[i] = params->masks[i].bits[0];
3335 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3336 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3337 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3338 oparams->info = params->info;
3339 oparams->msbits = params->msbits;
3340 oparams->rate_num = params->rate_num;
3341 oparams->rate_den = params->rate_den;
3342 oparams->fifo_size = params->fifo_size;
3343}
3344
877211f5
TI		 3345static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3346 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3347{
877211f5
TI		 3348 struct snd_pcm_hw_params *params;
3349 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3350 int err;
3351
3352 params = kmalloc(sizeof(*params), GFP_KERNEL);
3353 if (!params) {
3354 err = -ENOMEM;
3355 goto out;
3356 }
3357 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3358 if (!oparams) {
3359 err = -ENOMEM;
3360 goto out;
3361 }
3362
3363 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3364 err = -EFAULT;
3365 goto out;
3366 }
3367 snd_pcm_hw_convert_from_old_params(params, oparams);
3368 err = snd_pcm_hw_refine(substream, params);
3369 snd_pcm_hw_convert_to_old_params(oparams, params);
3370 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3371 if (!err)
3372 err = -EFAULT;
3373 }
3374out:
3375 kfree(params);
3376 kfree(oparams);
3377 return err;
3378}
3379
877211f5
TI		 3380static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3381 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3382{
877211f5
TI		 3383 struct snd_pcm_hw_params *params;
3384 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3385 int err;
3386
3387 params = kmalloc(sizeof(*params), GFP_KERNEL);
3388 if (!params) {
3389 err = -ENOMEM;
3390 goto out;
3391 }
3392 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3393 if (!oparams) {
3394 err = -ENOMEM;
3395 goto out;
3396 }
3397 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3398 err = -EFAULT;
3399 goto out;
3400 }
3401 snd_pcm_hw_convert_from_old_params(params, oparams);
3402 err = snd_pcm_hw_params(substream, params);
3403 snd_pcm_hw_convert_to_old_params(oparams, params);
3404 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3405 if (!err)
3406 err = -EFAULT;
3407 }
3408out:
3409 kfree(params);
3410 kfree(oparams);
3411 return err;
3412}
59d48582 3413#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4
LT		 3414
3415/*
3416 * Register section
3417 */
3418
9c2e08c5 3419const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3420 {
2af677fc
CL		 3421 .owner = THIS_MODULE,
3422 .write = snd_pcm_write,
ee0b3e67 3423 .aio_write = snd_pcm_aio_write,
f87135f5 3424 .open = snd_pcm_playback_open,
2af677fc
CL		 3425 .release = snd_pcm_release,
3426 .poll = snd_pcm_playback_poll,
3427 .unlocked_ioctl = snd_pcm_playback_ioctl,
3428 .compat_ioctl = snd_pcm_ioctl_compat,
3429 .mmap = snd_pcm_mmap,
3430 .fasync = snd_pcm_fasync,
1da177e4
LT		 3431 },
3432 {
2af677fc
CL		 3433 .owner = THIS_MODULE,
3434 .read = snd_pcm_read,
ee0b3e67 3435 .aio_read = snd_pcm_aio_read,
f87135f5 3436 .open = snd_pcm_capture_open,
2af677fc
CL		 3437 .release = snd_pcm_release,
3438 .poll = snd_pcm_capture_poll,
3439 .unlocked_ioctl = snd_pcm_capture_ioctl,
3440 .compat_ioctl = snd_pcm_ioctl_compat,
3441 .mmap = snd_pcm_mmap,
3442 .fasync = snd_pcm_fasync,
1da177e4
LT		 3443 }
3444};
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