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ALSA: Introduce snd_BUG_ON() macro
[net-next-2.6.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1da177e4 22#include <linux/mm.h>
1da177e4
LT		 23#include <linux/file.h>
24#include <linux/slab.h>
2db9f0a3 25#include <linux/smp_lock.h>
1da177e4 26#include <linux/time.h>
f011e2e2 27#include <linux/pm_qos_params.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);
1da177e4
LT		 416 runtime->info = params->info;
417 runtime->rate_num = params->rate_num;
418 runtime->rate_den = params->rate_den;
419
420 bits = snd_pcm_format_physical_width(runtime->format);
421 runtime->sample_bits = bits;
422 bits *= runtime->channels;
423 runtime->frame_bits = bits;
424 frames = 1;
425 while (bits % 8 != 0) {
426 bits *= 2;
427 frames *= 2;
428 }
429 runtime->byte_align = bits / 8;
430 runtime->min_align = frames;
431
432 /* Default sw params */
433 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
434 runtime->period_step = 1;
1da177e4 435 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 436 runtime->start_threshold = 1;
437 runtime->stop_threshold = runtime->buffer_size;
438 runtime->silence_threshold = 0;
439 runtime->silence_size = 0;
440 runtime->boundary = runtime->buffer_size;
441 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
442 runtime->boundary *= 2;
443
444 snd_pcm_timer_resolution_change(substream);
445 runtime->status->state = SNDRV_PCM_STATE_SETUP;
9442e691 446
f011e2e2
MG		 447 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
448 substream->latency_id);
9442e691 449 if ((usecs = period_to_usecs(runtime)) >= 0)
f011e2e2
MG		 450 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
451 substream->latency_id, usecs);
1da177e4
LT		 452 return 0;
453 _error:
454 /* hardware might be unuseable from this time,
455 so we force application to retry to set
456 the correct hardware parameter settings */
457 runtime->status->state = SNDRV_PCM_STATE_OPEN;
458 if (substream->ops->hw_free != NULL)
459 substream->ops->hw_free(substream);
460 return err;
461}
462
877211f5
TI		 463static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
464 struct snd_pcm_hw_params __user * _params)
1da177e4 465{
877211f5 466 struct snd_pcm_hw_params *params;
1da177e4
LT		 467 int err;
468
469 params = kmalloc(sizeof(*params), GFP_KERNEL);
470 if (!params) {
471 err = -ENOMEM;
472 goto out;
473 }
474 if (copy_from_user(params, _params, sizeof(*params))) {
475 err = -EFAULT;
476 goto out;
477 }
478 err = snd_pcm_hw_params(substream, params);
479 if (copy_to_user(_params, params, sizeof(*params))) {
480 if (!err)
481 err = -EFAULT;
482 }
483out:
484 kfree(params);
485 return err;
486}
487
877211f5 488static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 489{
877211f5 490 struct snd_pcm_runtime *runtime;
1da177e4
LT		 491 int result = 0;
492
493 snd_assert(substream != NULL, return -ENXIO);
494 runtime = substream->runtime;
495 snd_assert(runtime != NULL, return -ENXIO);
496 snd_pcm_stream_lock_irq(substream);
497 switch (runtime->status->state) {
498 case SNDRV_PCM_STATE_SETUP:
499 case SNDRV_PCM_STATE_PREPARED:
500 break;
501 default:
502 snd_pcm_stream_unlock_irq(substream);
503 return -EBADFD;
504 }
505 snd_pcm_stream_unlock_irq(substream);
9c323fcb 506 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 507 return -EBADFD;
508 if (substream->ops->hw_free)
509 result = substream->ops->hw_free(substream);
510 runtime->status->state = SNDRV_PCM_STATE_OPEN;
f011e2e2
MG		 511 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
512 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;
1da177e4
LT		 535 if (params->silence_size >= runtime->boundary) {
536 if (params->silence_threshold != 0)
537 return -EINVAL;
538 } else {
539 if (params->silence_size > params->silence_threshold)
540 return -EINVAL;
541 if (params->silence_threshold > runtime->buffer_size)
542 return -EINVAL;
543 }
544 snd_pcm_stream_lock_irq(substream);
545 runtime->tstamp_mode = params->tstamp_mode;
1da177e4
LT		 546 runtime->period_step = params->period_step;
547 runtime->control->avail_min = params->avail_min;
548 runtime->start_threshold = params->start_threshold;
549 runtime->stop_threshold = params->stop_threshold;
550 runtime->silence_threshold = params->silence_threshold;
551 runtime->silence_size = params->silence_size;
1da177e4
LT		 552 params->boundary = runtime->boundary;
553 if (snd_pcm_running(substream)) {
1da177e4
LT		 554 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
555 runtime->silence_size > 0)
556 snd_pcm_playback_silence(substream, ULONG_MAX);
557 wake_up(&runtime->sleep);
558 }
559 snd_pcm_stream_unlock_irq(substream);
560 return 0;
561}
562
877211f5
TI		 563static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
564 struct snd_pcm_sw_params __user * _params)
1da177e4 565{
877211f5 566 struct snd_pcm_sw_params params;
1da177e4
LT		 567 int err;
568 if (copy_from_user(&params, _params, sizeof(params)))
569 return -EFAULT;
570 err = snd_pcm_sw_params(substream, &params);
571 if (copy_to_user(_params, &params, sizeof(params)))
572 return -EFAULT;
573 return err;
574}
575
877211f5
TI		 576int snd_pcm_status(struct snd_pcm_substream *substream,
577 struct snd_pcm_status *status)
1da177e4 578{
877211f5 579 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 580
581 snd_pcm_stream_lock_irq(substream);
582 status->state = runtime->status->state;
583 status->suspended_state = runtime->status->suspended_state;
584 if (status->state == SNDRV_PCM_STATE_OPEN)
585 goto _end;
586 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 587 if (snd_pcm_running(substream)) {
1da177e4 588 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 589 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
590 status->tstamp = runtime->status->tstamp;
591 goto _tstamp_end;
592 }
593 }
a713b583 594 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 595 _tstamp_end:
1da177e4
LT		 596 status->appl_ptr = runtime->control->appl_ptr;
597 status->hw_ptr = runtime->status->hw_ptr;
598 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
599 status->avail = snd_pcm_playback_avail(runtime);
600 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
601 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
602 status->delay = runtime->buffer_size - status->avail;
603 else
604 status->delay = 0;
605 } else {
606 status->avail = snd_pcm_capture_avail(runtime);
607 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
608 status->delay = status->avail;
609 else
610 status->delay = 0;
611 }
612 status->avail_max = runtime->avail_max;
613 status->overrange = runtime->overrange;
614 runtime->avail_max = 0;
615 runtime->overrange = 0;
616 _end:
617 snd_pcm_stream_unlock_irq(substream);
618 return 0;
619}
620
877211f5
TI		 621static int snd_pcm_status_user(struct snd_pcm_substream *substream,
622 struct snd_pcm_status __user * _status)
1da177e4 623{
877211f5
TI		 624 struct snd_pcm_status status;
625 struct snd_pcm_runtime *runtime;
1da177e4
LT		 626 int res;
627
628 snd_assert(substream != NULL, return -ENXIO);
629 runtime = substream->runtime;
630 memset(&status, 0, sizeof(status));
631 res = snd_pcm_status(substream, &status);
632 if (res < 0)
633 return res;
634 if (copy_to_user(_status, &status, sizeof(status)))
635 return -EFAULT;
636 return 0;
637}
638
877211f5
TI		 639static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
640 struct snd_pcm_channel_info * info)
1da177e4 641{
877211f5 642 struct snd_pcm_runtime *runtime;
1da177e4
LT		 643 unsigned int channel;
644
645 snd_assert(substream != NULL, return -ENXIO);
646 channel = info->channel;
647 runtime = substream->runtime;
648 snd_pcm_stream_lock_irq(substream);
649 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
650 snd_pcm_stream_unlock_irq(substream);
651 return -EBADFD;
652 }
653 snd_pcm_stream_unlock_irq(substream);
654 if (channel >= runtime->channels)
655 return -EINVAL;
656 memset(info, 0, sizeof(*info));
657 info->channel = channel;
658 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
659}
660
877211f5
TI		 661static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
662 struct snd_pcm_channel_info __user * _info)
1da177e4 663{
877211f5 664 struct snd_pcm_channel_info info;
1da177e4
LT		 665 int res;
666
667 if (copy_from_user(&info, _info, sizeof(info)))
668 return -EFAULT;
669 res = snd_pcm_channel_info(substream, &info);
670 if (res < 0)
671 return res;
672 if (copy_to_user(_info, &info, sizeof(info)))
673 return -EFAULT;
674 return 0;
675}
676
877211f5 677static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 678{
877211f5 679 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 680 if (runtime->trigger_master == NULL)
681 return;
682 if (runtime->trigger_master == substream) {
b751eef1 683 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 684 } else {
685 snd_pcm_trigger_tstamp(runtime->trigger_master);
686 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
687 }
688 runtime->trigger_master = NULL;
689}
690
691struct action_ops {
877211f5
TI		 692 int (*pre_action)(struct snd_pcm_substream *substream, int state);
693 int (*do_action)(struct snd_pcm_substream *substream, int state);
694 void (*undo_action)(struct snd_pcm_substream *substream, int state);
695 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 696};
697
698/*
699 * this functions is core for handling of linked stream
700 * Note: the stream state might be changed also on failure
701 * Note2: call with calling stream lock + link lock
702 */
703static int snd_pcm_action_group(struct action_ops *ops,
877211f5 704 struct snd_pcm_substream *substream,
1da177e4
LT		 705 int state, int do_lock)
706{
877211f5
TI		 707 struct snd_pcm_substream *s = NULL;
708 struct snd_pcm_substream *s1;
1da177e4
LT		 709 int res = 0;
710
ef991b95 711 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 712 if (do_lock && s != substream)
208eee2a
FD		 713 spin_lock_nested(&s->self_group.lock,
714 SINGLE_DEPTH_NESTING);
1da177e4
LT		 715 res = ops->pre_action(s, state);
716 if (res < 0)
717 goto _unlock;
718 }
ef991b95 719 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 720 res = ops->do_action(s, state);
721 if (res < 0) {
722 if (ops->undo_action) {
ef991b95 723 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 724 if (s1 == s) /* failed stream */
725 break;
726 ops->undo_action(s1, state);
727 }
728 }
729 s = NULL; /* unlock all */
730 goto _unlock;
731 }
732 }
ef991b95 733 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 734 ops->post_action(s, state);
735 }
736 _unlock:
737 if (do_lock) {
738 /* unlock streams */
ef991b95 739 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 740 if (s1 != substream)
741 spin_unlock(&s1->self_group.lock);
742 if (s1 == s) /* end */
743 break;
744 }
745 }
746 return res;
747}
748
749/*
750 * Note: call with stream lock
751 */
752static int snd_pcm_action_single(struct action_ops *ops,
877211f5 753 struct snd_pcm_substream *substream,
1da177e4
LT		 754 int state)
755{
756 int res;
757
758 res = ops->pre_action(substream, state);
759 if (res < 0)
760 return res;
761 res = ops->do_action(substream, state);
762 if (res == 0)
763 ops->post_action(substream, state);
764 else if (ops->undo_action)
765 ops->undo_action(substream, state);
766 return res;
767}
768
769/*
770 * Note: call with stream lock
771 */
772static int snd_pcm_action(struct action_ops *ops,
877211f5 773 struct snd_pcm_substream *substream,
1da177e4
LT		 774 int state)
775{
776 int res;
777
778 if (snd_pcm_stream_linked(substream)) {
779 if (!spin_trylock(&substream->group->lock)) {
780 spin_unlock(&substream->self_group.lock);
781 spin_lock(&substream->group->lock);
782 spin_lock(&substream->self_group.lock);
783 }
784 res = snd_pcm_action_group(ops, substream, state, 1);
785 spin_unlock(&substream->group->lock);
786 } else {
787 res = snd_pcm_action_single(ops, substream, state);
788 }
789 return res;
790}
791
792/*
793 * Note: don't use any locks before
794 */
795static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 796 struct snd_pcm_substream *substream,
1da177e4
LT		 797 int state)
798{
799 int res;
800
801 read_lock_irq(&snd_pcm_link_rwlock);
802 if (snd_pcm_stream_linked(substream)) {
803 spin_lock(&substream->group->lock);
804 spin_lock(&substream->self_group.lock);
805 res = snd_pcm_action_group(ops, substream, state, 1);
806 spin_unlock(&substream->self_group.lock);
807 spin_unlock(&substream->group->lock);
808 } else {
809 spin_lock(&substream->self_group.lock);
810 res = snd_pcm_action_single(ops, substream, state);
811 spin_unlock(&substream->self_group.lock);
812 }
813 read_unlock_irq(&snd_pcm_link_rwlock);
814 return res;
815}
816
817/*
818 */
819static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 820 struct snd_pcm_substream *substream,
1da177e4
LT		 821 int state)
822{
823 int res;
824
825 down_read(&snd_pcm_link_rwsem);
826 if (snd_pcm_stream_linked(substream))
827 res = snd_pcm_action_group(ops, substream, state, 0);
828 else
829 res = snd_pcm_action_single(ops, substream, state);
830 up_read(&snd_pcm_link_rwsem);
831 return res;
832}
833
834/*
835 * start callbacks
836 */
877211f5 837static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 838{
877211f5 839 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 840 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
841 return -EBADFD;
842 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
843 !snd_pcm_playback_data(substream))
844 return -EPIPE;
845 runtime->trigger_master = substream;
846 return 0;
847}
848
877211f5 849static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 850{
851 if (substream->runtime->trigger_master != substream)
852 return 0;
853 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
854}
855
877211f5 856static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 857{
858 if (substream->runtime->trigger_master == substream)
859 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
860}
861
877211f5 862static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 863{
877211f5 864 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 865 snd_pcm_trigger_tstamp(substream);
866 runtime->status->state = state;
867 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
868 runtime->silence_size > 0)
869 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 870 if (substream->timer)
877211f5
TI		 871 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
872 &runtime->trigger_tstamp);
1da177e4
LT		 873}
874
875static struct action_ops snd_pcm_action_start = {
876 .pre_action = snd_pcm_pre_start,
877 .do_action = snd_pcm_do_start,
878 .undo_action = snd_pcm_undo_start,
879 .post_action = snd_pcm_post_start
880};
881
882/**
883 * snd_pcm_start
df8db936 884 * @substream: the PCM substream instance
1da177e4
LT		 885 *
886 * Start all linked streams.
887 */
877211f5 888int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 889{
877211f5
TI		 890 return snd_pcm_action(&snd_pcm_action_start, substream,
891 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 892}
893
894/*
895 * stop callbacks
896 */
877211f5 897static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 898{
877211f5 899 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
901 return -EBADFD;
902 runtime->trigger_master = substream;
903 return 0;
904}
905
877211f5 906static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 907{
908 if (substream->runtime->trigger_master == substream &&
909 snd_pcm_running(substream))
910 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
911 return 0; /* unconditonally stop all substreams */
912}
913
877211f5 914static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 915{
877211f5 916 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 917 if (runtime->status->state != state) {
918 snd_pcm_trigger_tstamp(substream);
919 if (substream->timer)
877211f5
TI		 920 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
921 &runtime->trigger_tstamp);
1da177e4 922 runtime->status->state = state;
1da177e4
LT		 923 }
924 wake_up(&runtime->sleep);
925}
926
927static struct action_ops snd_pcm_action_stop = {
928 .pre_action = snd_pcm_pre_stop,
929 .do_action = snd_pcm_do_stop,
930 .post_action = snd_pcm_post_stop
931};
932
933/**
934 * snd_pcm_stop
df8db936
TI		 935 * @substream: the PCM substream instance
936 * @state: PCM state after stopping the stream
1da177e4
LT		 937 *
938 * Try to stop all running streams in the substream group.
939 * The state of each stream is changed to the given value after that unconditionally.
940 */
877211f5 941int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 942{
943 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
944}
945
e88e8ae6
TI		 946EXPORT_SYMBOL(snd_pcm_stop);
947
1da177e4
LT		 948/**
949 * snd_pcm_drain_done
df8db936 950 * @substream: the PCM substream
1da177e4
LT		 951 *
952 * Stop the DMA only when the given stream is playback.
953 * The state is changed to SETUP.
954 * Unlike snd_pcm_stop(), this affects only the given stream.
955 */
877211f5 956int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 957{
877211f5
TI		 958 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
959 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 960}
961
962/*
963 * pause callbacks
964 */
877211f5 965static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 966{
877211f5 967 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 968 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
969 return -ENOSYS;
970 if (push) {
971 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
972 return -EBADFD;
973 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
974 return -EBADFD;
975 runtime->trigger_master = substream;
976 return 0;
977}
978
877211f5 979static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 980{
981 if (substream->runtime->trigger_master != substream)
982 return 0;
983 return substream->ops->trigger(substream,
984 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
985 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
986}
987
877211f5 988static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 989{
990 if (substream->runtime->trigger_master == substream)
991 substream->ops->trigger(substream,
992 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
993 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
994}
995
877211f5 996static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 997{
877211f5 998 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 999 snd_pcm_trigger_tstamp(substream);
1000 if (push) {
1001 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1002 if (substream->timer)
877211f5
TI		 1003 snd_timer_notify(substream->timer,
1004 SNDRV_TIMER_EVENT_MPAUSE,
1005 &runtime->trigger_tstamp);
1da177e4
LT		 1006 wake_up(&runtime->sleep);
1007 } else {
1008 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1009 if (substream->timer)
877211f5
TI		 1010 snd_timer_notify(substream->timer,
1011 SNDRV_TIMER_EVENT_MCONTINUE,
1012 &runtime->trigger_tstamp);
1da177e4
LT		 1013 }
1014}
1015
1016static struct action_ops snd_pcm_action_pause = {
1017 .pre_action = snd_pcm_pre_pause,
1018 .do_action = snd_pcm_do_pause,
1019 .undo_action = snd_pcm_undo_pause,
1020 .post_action = snd_pcm_post_pause
1021};
1022
1023/*
1024 * Push/release the pause for all linked streams.
1025 */
877211f5 1026static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1027{
1028 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1029}
1030
1031#ifdef CONFIG_PM
1032/* suspend */
1033
877211f5 1034static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1035{
877211f5 1036 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1037 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1038 return -EBUSY;
1039 runtime->trigger_master = substream;
1040 return 0;
1041}
1042
877211f5 1043static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1044{
877211f5 1045 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1046 if (runtime->trigger_master != substream)
1047 return 0;
1048 if (! snd_pcm_running(substream))
1049 return 0;
1050 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1051 return 0; /* suspend unconditionally */
1052}
1053
877211f5 1054static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1055{
877211f5 1056 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1057 snd_pcm_trigger_tstamp(substream);
1058 if (substream->timer)
877211f5
TI		 1059 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1060 &runtime->trigger_tstamp);
1da177e4
LT		 1061 runtime->status->suspended_state = runtime->status->state;
1062 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4
LT		 1063 wake_up(&runtime->sleep);
1064}
1065
1066static struct action_ops snd_pcm_action_suspend = {
1067 .pre_action = snd_pcm_pre_suspend,
1068 .do_action = snd_pcm_do_suspend,
1069 .post_action = snd_pcm_post_suspend
1070};
1071
1072/**
1073 * snd_pcm_suspend
df8db936 1074 * @substream: the PCM substream
1da177e4
LT		 1075 *
1076 * Trigger SUSPEND to all linked streams.
1077 * After this call, all streams are changed to SUSPENDED state.
1078 */
877211f5 1079int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1080{
1081 int err;
1082 unsigned long flags;
1083
603bf524
TI		 1084 if (! substream)
1085 return 0;
1086
1da177e4
LT		 1087 snd_pcm_stream_lock_irqsave(substream, flags);
1088 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1089 snd_pcm_stream_unlock_irqrestore(substream, flags);
1090 return err;
1091}
1092
e88e8ae6
TI		 1093EXPORT_SYMBOL(snd_pcm_suspend);
1094
1da177e4
LT		 1095/**
1096 * snd_pcm_suspend_all
df8db936 1097 * @pcm: the PCM instance
1da177e4
LT		 1098 *
1099 * Trigger SUSPEND to all substreams in the given pcm.
1100 * After this call, all streams are changed to SUSPENDED state.
1101 */
877211f5 1102int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1103{
877211f5 1104 struct snd_pcm_substream *substream;
1da177e4
LT		 1105 int stream, err = 0;
1106
603bf524
TI		 1107 if (! pcm)
1108 return 0;
1109
1da177e4 1110 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1111 for (substream = pcm->streams[stream].substream;
1112 substream; substream = substream->next) {
1da177e4
LT		 1113 /* FIXME: the open/close code should lock this as well */
1114 if (substream->runtime == NULL)
1115 continue;
1116 err = snd_pcm_suspend(substream);
1117 if (err < 0 && err != -EBUSY)
1118 return err;
1119 }
1120 }
1121 return 0;
1122}
1123
e88e8ae6
TI		 1124EXPORT_SYMBOL(snd_pcm_suspend_all);
1125
1da177e4
LT		 1126/* resume */
1127
877211f5 1128static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1129{
877211f5 1130 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1131 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1132 return -ENOSYS;
1133 runtime->trigger_master = substream;
1134 return 0;
1135}
1136
877211f5 1137static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1138{
877211f5 1139 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1140 if (runtime->trigger_master != substream)
1141 return 0;
1142 /* DMA not running previously? */
1143 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1144 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1145 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1146 return 0;
1147 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1148}
1149
877211f5 1150static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1151{
1152 if (substream->runtime->trigger_master == substream &&
1153 snd_pcm_running(substream))
1154 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1155}
1156
877211f5 1157static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1158{
877211f5 1159 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1160 snd_pcm_trigger_tstamp(substream);
1161 if (substream->timer)
877211f5
TI		 1162 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1163 &runtime->trigger_tstamp);
1da177e4 1164 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1165}
1166
1167static struct action_ops snd_pcm_action_resume = {
1168 .pre_action = snd_pcm_pre_resume,
1169 .do_action = snd_pcm_do_resume,
1170 .undo_action = snd_pcm_undo_resume,
1171 .post_action = snd_pcm_post_resume
1172};
1173
877211f5 1174static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1175{
877211f5 1176 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1177 int res;
1178
1179 snd_power_lock(card);
cbac4b0c 1180 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1181 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1182 snd_power_unlock(card);
1183 return res;
1184}
1185
1186#else
1187
877211f5 1188static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1189{
1190 return -ENOSYS;
1191}
1192
1193#endif /* CONFIG_PM */
1194
1195/*
1196 * xrun ioctl
1197 *
1198 * Change the RUNNING stream(s) to XRUN state.
1199 */
877211f5 1200static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1201{
877211f5
TI		 1202 struct snd_card *card = substream->pcm->card;
1203 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1204 int result;
1205
1206 snd_power_lock(card);
1207 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1208 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1209 if (result < 0)
1210 goto _unlock;
1211 }
1212
1213 snd_pcm_stream_lock_irq(substream);
1214 switch (runtime->status->state) {
1215 case SNDRV_PCM_STATE_XRUN:
1216 result = 0; /* already there */
1217 break;
1218 case SNDRV_PCM_STATE_RUNNING:
1219 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1220 break;
1221 default:
1222 result = -EBADFD;
1223 }
1224 snd_pcm_stream_unlock_irq(substream);
1225 _unlock:
1226 snd_power_unlock(card);
1227 return result;
1228}
1229
1230/*
1231 * reset ioctl
1232 */
877211f5 1233static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1234{
877211f5 1235 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1236 switch (runtime->status->state) {
1237 case SNDRV_PCM_STATE_RUNNING:
1238 case SNDRV_PCM_STATE_PREPARED:
1239 case SNDRV_PCM_STATE_PAUSED:
1240 case SNDRV_PCM_STATE_SUSPENDED:
1241 return 0;
1242 default:
1243 return -EBADFD;
1244 }
1245}
1246
877211f5 1247static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1248{
877211f5 1249 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1250 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1251 if (err < 0)
1252 return err;
1253 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1254 runtime->hw_ptr_base = 0;
877211f5
TI		 1255 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1256 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1257 runtime->silence_start = runtime->status->hw_ptr;
1258 runtime->silence_filled = 0;
1259 return 0;
1260}
1261
877211f5 1262static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1263{
877211f5 1264 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1265 runtime->control->appl_ptr = runtime->status->hw_ptr;
1266 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1267 runtime->silence_size > 0)
1268 snd_pcm_playback_silence(substream, ULONG_MAX);
1269}
1270
1271static struct action_ops snd_pcm_action_reset = {
1272 .pre_action = snd_pcm_pre_reset,
1273 .do_action = snd_pcm_do_reset,
1274 .post_action = snd_pcm_post_reset
1275};
1276
877211f5 1277static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1278{
1279 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1280}
1281
1282/*
1283 * prepare ioctl
1284 */
0df63e44
TI		 1285/* we use the second argument for updating f_flags */
1286static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1287 int f_flags)
1da177e4 1288{
877211f5 1289 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1290 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1291 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1292 return -EBADFD;
1293 if (snd_pcm_running(substream))
1294 return -EBUSY;
0df63e44 1295 substream->f_flags = f_flags;
1da177e4
LT		 1296 return 0;
1297}
1298
877211f5 1299static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1300{
1301 int err;
1302 err = substream->ops->prepare(substream);
1303 if (err < 0)
1304 return err;
1305 return snd_pcm_do_reset(substream, 0);
1306}
1307
877211f5 1308static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1309{
877211f5 1310 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1311 runtime->control->appl_ptr = runtime->status->hw_ptr;
1312 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1313}
1314
1315static struct action_ops snd_pcm_action_prepare = {
1316 .pre_action = snd_pcm_pre_prepare,
1317 .do_action = snd_pcm_do_prepare,
1318 .post_action = snd_pcm_post_prepare
1319};
1320
1321/**
1322 * snd_pcm_prepare
df8db936 1323 * @substream: the PCM substream instance
0df63e44 1324 * @file: file to refer f_flags
df8db936
TI		 1325 *
1326 * Prepare the PCM substream to be triggerable.
1da177e4 1327 */
0df63e44
TI		 1328static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1329 struct file *file)
1da177e4
LT		 1330{
1331 int res;
877211f5 1332 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1333 int f_flags;
1334
1335 if (file)
1336 f_flags = file->f_flags;
1337 else
1338 f_flags = substream->f_flags;
1da177e4
LT		 1339
1340 snd_power_lock(card);
cbac4b0c 1341 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1342 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1343 substream, f_flags);
1da177e4
LT		 1344 snd_power_unlock(card);
1345 return res;
1346}
1347
1348/*
1349 * drain ioctl
1350 */
1351
877211f5 1352static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1353{
0df63e44 1354 if (substream->f_flags & O_NONBLOCK)
1da177e4
LT		 1355 return -EAGAIN;
1356 substream->runtime->trigger_master = substream;
1357 return 0;
1358}
1359
877211f5 1360static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1361{
877211f5 1362 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1363 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1364 switch (runtime->status->state) {
1365 case SNDRV_PCM_STATE_PREPARED:
1366 /* start playback stream if possible */
1367 if (! snd_pcm_playback_empty(substream)) {
1368 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1369 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1370 }
1371 break;
1372 case SNDRV_PCM_STATE_RUNNING:
1373 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1374 break;
1375 default:
1376 break;
1377 }
1378 } else {
1379 /* stop running stream */
1380 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1381 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1382 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1383 snd_pcm_do_stop(substream, new_state);
1384 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1385 }
1386 }
1387 return 0;
1388}
1389
877211f5 1390static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1391{
1392}
1393
1394static struct action_ops snd_pcm_action_drain_init = {
1395 .pre_action = snd_pcm_pre_drain_init,
1396 .do_action = snd_pcm_do_drain_init,
1397 .post_action = snd_pcm_post_drain_init
1398};
1399
1400struct drain_rec {
877211f5 1401 struct snd_pcm_substream *substream;
1da177e4
LT		 1402 wait_queue_t wait;
1403 snd_pcm_uframes_t stop_threshold;
1404};
1405
877211f5 1406static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1407
1408/*
1409 * Drain the stream(s).
1410 * When the substream is linked, sync until the draining of all playback streams
1411 * is finished.
1412 * After this call, all streams are supposed to be either SETUP or DRAINING
1413 * (capture only) state.
1414 */
877211f5 1415static int snd_pcm_drain(struct snd_pcm_substream *substream)
1da177e4 1416{
877211f5
TI		 1417 struct snd_card *card;
1418 struct snd_pcm_runtime *runtime;
ef991b95 1419 struct snd_pcm_substream *s;
1da177e4
LT		 1420 int result = 0;
1421 int i, num_drecs;
1422 struct drain_rec *drec, drec_tmp, *d;
1423
1424 snd_assert(substream != NULL, return -ENXIO);
1425 card = substream->pcm->card;
1426 runtime = substream->runtime;
1427
1428 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1429 return -EBADFD;
1430
1da177e4
LT		 1431 snd_power_lock(card);
1432 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1433 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1434 if (result < 0) {
1435 snd_power_unlock(card);
1436 return result;
1437 }
1da177e4
LT		 1438 }
1439
1440 /* allocate temporary record for drain sync */
21cb2a2e 1441 down_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1442 if (snd_pcm_stream_linked(substream)) {
1443 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1444 if (! drec) {
21cb2a2e
TI		 1445 up_read(&snd_pcm_link_rwsem);
1446 snd_power_unlock(card);
1447 return -ENOMEM;
1da177e4
LT		 1448 }
1449 } else
1450 drec = &drec_tmp;
1451
21cb2a2e 1452 /* count only playback streams */
1da177e4 1453 num_drecs = 0;
ef991b95 1454 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 1455 runtime = s->runtime;
1da177e4
LT		 1456 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1457 d = &drec[num_drecs++];
1458 d->substream = s;
1459 init_waitqueue_entry(&d->wait, current);
1460 add_wait_queue(&runtime->sleep, &d->wait);
1461 /* stop_threshold fixup to avoid endless loop when
1462 * stop_threshold > buffer_size
1463 */
1464 d->stop_threshold = runtime->stop_threshold;
1465 if (runtime->stop_threshold > runtime->buffer_size)
1466 runtime->stop_threshold = runtime->buffer_size;
1467 }
1468 }
21cb2a2e 1469 up_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1470
1471 snd_pcm_stream_lock_irq(substream);
1472 /* resume pause */
1a7fa543 1473 if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1474 snd_pcm_pause(substream, 0);
1475
1476 /* pre-start/stop - all running streams are changed to DRAINING state */
1477 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1478 if (result < 0) {
1479 snd_pcm_stream_unlock_irq(substream);
1480 goto _error;
1481 }
1da177e4
LT		 1482
1483 for (;;) {
1484 long tout;
1485 if (signal_pending(current)) {
1486 result = -ERESTARTSYS;
1487 break;
1488 }
21cb2a2e
TI		 1489 /* all finished? */
1490 for (i = 0; i < num_drecs; i++) {
1491 runtime = drec[i].substream->runtime;
1492 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1493 break;
1494 }
1495 if (i == num_drecs)
1496 break; /* yes, all drained */
1497
1da177e4
LT		 1498 set_current_state(TASK_INTERRUPTIBLE);
1499 snd_pcm_stream_unlock_irq(substream);
1500 snd_power_unlock(card);
1501 tout = schedule_timeout(10 * HZ);
1502 snd_power_lock(card);
1503 snd_pcm_stream_lock_irq(substream);
1504 if (tout == 0) {
1505 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1506 result = -ESTRPIPE;
1507 else {
1508 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1509 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1510 result = -EIO;
1511 }
1512 break;
1513 }
1da177e4 1514 }
21cb2a2e
TI		 1515
1516 snd_pcm_stream_unlock_irq(substream);
1517
1518 _error:
1da177e4
LT		 1519 for (i = 0; i < num_drecs; i++) {
1520 d = &drec[i];
1521 runtime = d->substream->runtime;
1522 remove_wait_queue(&runtime->sleep, &d->wait);
1523 runtime->stop_threshold = d->stop_threshold;
1524 }
1525
1da177e4
LT		 1526 if (drec != &drec_tmp)
1527 kfree(drec);
1da177e4 1528 snd_power_unlock(card);
1da177e4
LT		 1529
1530 return result;
1531}
1532
1533/*
1534 * drop ioctl
1535 *
1536 * Immediately put all linked substreams into SETUP state.
1537 */
877211f5 1538static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1539{
877211f5
TI		 1540 struct snd_pcm_runtime *runtime;
1541 struct snd_card *card;
1da177e4
LT		 1542 int result = 0;
1543
1544 snd_assert(substream != NULL, return -ENXIO);
1545 runtime = substream->runtime;
1546 card = substream->pcm->card;
1547
de1b8b93 1548 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1549 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1550 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1551 return -EBADFD;
1552
1da177e4
LT		 1553 snd_pcm_stream_lock_irq(substream);
1554 /* resume pause */
1555 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1556 snd_pcm_pause(substream, 0);
1557
1558 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1559 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1560 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1561
1da177e4
LT		 1562 return result;
1563}
1564
1565
1566/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1567static struct file *snd_pcm_file_fd(int fd)
1568{
1569 struct file *file;
1570 struct inode *inode;
f87135f5
CL		 1571 unsigned int minor;
1572
1da177e4
LT		 1573 file = fget(fd);
1574 if (!file)
1575 return NULL;
7bc56323 1576 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1577 if (!S_ISCHR(inode->i_mode) ||
1578 imajor(inode) != snd_major) {
1579 fput(file);
1580 return NULL;
1581 }
1582 minor = iminor(inode);
f87135f5
CL		 1583 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1584 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1585 fput(file);
1586 return NULL;
1587 }
1588 return file;
1589}
1590
1591/*
1592 * PCM link handling
1593 */
877211f5 1594static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1595{
1596 int res = 0;
1597 struct file *file;
877211f5
TI		 1598 struct snd_pcm_file *pcm_file;
1599 struct snd_pcm_substream *substream1;
1da177e4
LT		 1600
1601 file = snd_pcm_file_fd(fd);
1602 if (!file)
1603 return -EBADFD;
1604 pcm_file = file->private_data;
1605 substream1 = pcm_file->substream;
1606 down_write(&snd_pcm_link_rwsem);
1607 write_lock_irq(&snd_pcm_link_rwlock);
1608 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1609 substream->runtime->status->state != substream1->runtime->status->state) {
1610 res = -EBADFD;
1611 goto _end;
1612 }
1613 if (snd_pcm_stream_linked(substream1)) {
1614 res = -EALREADY;
1615 goto _end;
1616 }
1617 if (!snd_pcm_stream_linked(substream)) {
877211f5 1618 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1da177e4
LT		 1619 if (substream->group == NULL) {
1620 res = -ENOMEM;
1621 goto _end;
1622 }
1623 spin_lock_init(&substream->group->lock);
1624 INIT_LIST_HEAD(&substream->group->substreams);
1625 list_add_tail(&substream->link_list, &substream->group->substreams);
1626 substream->group->count = 1;
1627 }
1628 list_add_tail(&substream1->link_list, &substream->group->substreams);
1629 substream->group->count++;
1630 substream1->group = substream->group;
1631 _end:
1632 write_unlock_irq(&snd_pcm_link_rwlock);
1633 up_write(&snd_pcm_link_rwsem);
1634 fput(file);
1635 return res;
1636}
1637
877211f5 1638static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1639{
1640 substream->group = &substream->self_group;
1641 INIT_LIST_HEAD(&substream->self_group.substreams);
1642 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1643}
1644
877211f5 1645static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1646{
ef991b95 1647 struct snd_pcm_substream *s;
1da177e4
LT		 1648 int res = 0;
1649
1650 down_write(&snd_pcm_link_rwsem);
1651 write_lock_irq(&snd_pcm_link_rwlock);
1652 if (!snd_pcm_stream_linked(substream)) {
1653 res = -EALREADY;
1654 goto _end;
1655 }
1656 list_del(&substream->link_list);
1657 substream->group->count--;
1658 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1659 snd_pcm_group_for_each_entry(s, substream) {
1660 relink_to_local(s);
1da177e4
LT		 1661 break;
1662 }
1663 kfree(substream->group);
1664 }
1665 relink_to_local(substream);
1666 _end:
1667 write_unlock_irq(&snd_pcm_link_rwlock);
1668 up_write(&snd_pcm_link_rwsem);
1669 return res;
1670}
1671
1672/*
1673 * hw configurator
1674 */
877211f5
TI		 1675static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1676 struct snd_pcm_hw_rule *rule)
1da177e4 1677{
877211f5 1678 struct snd_interval t;
1da177e4
LT		 1679 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1680 hw_param_interval_c(params, rule->deps[1]), &t);
1681 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1682}
1683
877211f5
TI		 1684static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1685 struct snd_pcm_hw_rule *rule)
1da177e4 1686{
877211f5 1687 struct snd_interval t;
1da177e4
LT		 1688 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1689 hw_param_interval_c(params, rule->deps[1]), &t);
1690 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1691}
1692
877211f5
TI		 1693static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1694 struct snd_pcm_hw_rule *rule)
1da177e4 1695{
877211f5 1696 struct snd_interval t;
1da177e4
LT		 1697 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1698 hw_param_interval_c(params, rule->deps[1]),
1699 (unsigned long) rule->private, &t);
1700 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1701}
1702
877211f5
TI		 1703static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1704 struct snd_pcm_hw_rule *rule)
1da177e4 1705{
877211f5 1706 struct snd_interval t;
1da177e4
LT		 1707 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1708 (unsigned long) rule->private,
1709 hw_param_interval_c(params, rule->deps[1]), &t);
1710 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1711}
1712
877211f5
TI		 1713static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1714 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1715{
1716 unsigned int k;
877211f5
TI		 1717 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1718 struct snd_mask m;
1719 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1720 snd_mask_any(&m);
1721 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1722 int bits;
1723 if (! snd_mask_test(mask, k))
1724 continue;
1725 bits = snd_pcm_format_physical_width(k);
1726 if (bits <= 0)
1727 continue; /* ignore invalid formats */
1728 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1729 snd_mask_reset(&m, k);
1730 }
1731 return snd_mask_refine(mask, &m);
1732}
1733
877211f5
TI		 1734static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1735 struct snd_pcm_hw_rule *rule)
1da177e4 1736{
877211f5 1737 struct snd_interval t;
1da177e4
LT		 1738 unsigned int k;
1739 t.min = UINT_MAX;
1740 t.max = 0;
1741 t.openmin = 0;
1742 t.openmax = 0;
1743 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1744 int bits;
1745 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1746 continue;
1747 bits = snd_pcm_format_physical_width(k);
1748 if (bits <= 0)
1749 continue; /* ignore invalid formats */
1750 if (t.min > (unsigned)bits)
1751 t.min = bits;
1752 if (t.max < (unsigned)bits)
1753 t.max = bits;
1754 }
1755 t.integer = 1;
1756 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1757}
1758
1759#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1760#error "Change this table"
1761#endif
1762
1763static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1764 48000, 64000, 88200, 96000, 176400, 192000 };
1765
7653d557
CL		 1766const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1767 .count = ARRAY_SIZE(rates),
1768 .list = rates,
1769};
1770
877211f5
TI		 1771static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1772 struct snd_pcm_hw_rule *rule)
1da177e4 1773{
877211f5 1774 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1775 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1776 snd_pcm_known_rates.count,
1777 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1778}
1779
877211f5
TI		 1780static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1781 struct snd_pcm_hw_rule *rule)
1da177e4 1782{
877211f5
TI		 1783 struct snd_interval t;
1784 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1785 t.min = 0;
1786 t.max = substream->buffer_bytes_max;
1787 t.openmin = 0;
1788 t.openmax = 0;
1789 t.integer = 1;
1790 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1791}
1792
877211f5 1793int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1794{
877211f5
TI		 1795 struct snd_pcm_runtime *runtime = substream->runtime;
1796 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1797 int k, err;
1798
1799 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1800 snd_mask_any(constrs_mask(constrs, k));
1801 }
1802
1803 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1804 snd_interval_any(constrs_interval(constrs, k));
1805 }
1806
1807 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1808 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1809 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1810 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1811 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1812
1813 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1814 snd_pcm_hw_rule_format, NULL,
1815 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1816 if (err < 0)
1817 return err;
1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1819 snd_pcm_hw_rule_sample_bits, NULL,
1820 SNDRV_PCM_HW_PARAM_FORMAT,
1821 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1822 if (err < 0)
1823 return err;
1824 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1825 snd_pcm_hw_rule_div, NULL,
1826 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1827 if (err < 0)
1828 return err;
1829 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1830 snd_pcm_hw_rule_mul, NULL,
1831 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1832 if (err < 0)
1833 return err;
1834 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1835 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1836 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1837 if (err < 0)
1838 return err;
1839 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1840 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1841 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1842 if (err < 0)
1843 return err;
1844 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1845 snd_pcm_hw_rule_div, NULL,
1846 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1847 if (err < 0)
1848 return err;
1849 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1850 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1851 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1852 if (err < 0)
1853 return err;
1854 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1855 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1856 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1857 if (err < 0)
1858 return err;
1859 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1860 snd_pcm_hw_rule_div, NULL,
1861 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1862 if (err < 0)
1863 return err;
1864 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1865 snd_pcm_hw_rule_div, NULL,
1866 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1867 if (err < 0)
1868 return err;
1869 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1870 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1871 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1872 if (err < 0)
1873 return err;
1874 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1875 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1876 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1877 if (err < 0)
1878 return err;
1879 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1880 snd_pcm_hw_rule_mul, NULL,
1881 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1882 if (err < 0)
1883 return err;
1884 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1885 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1886 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1887 if (err < 0)
1888 return err;
1889 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1890 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1891 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1892 if (err < 0)
1893 return err;
1894 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1895 snd_pcm_hw_rule_muldivk, (void*) 8,
1896 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1897 if (err < 0)
1898 return err;
1899 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1900 snd_pcm_hw_rule_muldivk, (void*) 8,
1901 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1902 if (err < 0)
1903 return err;
1904 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1905 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1906 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1907 if (err < 0)
1908 return err;
1909 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1910 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1911 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1912 if (err < 0)
1913 return err;
1914 return 0;
1915}
1916
877211f5 1917int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1918{
877211f5
TI		 1919 struct snd_pcm_runtime *runtime = substream->runtime;
1920 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1921 int err;
1922 unsigned int mask = 0;
1923
1924 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1925 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1926 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1927 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1928 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1929 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1930 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1931 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1932 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1933 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1934 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1935 }
1936 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1937 snd_assert(err >= 0, return -EINVAL);
1938
1939 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1940 snd_assert(err >= 0, return -EINVAL);
1941
1942 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1943 snd_assert(err >= 0, return -EINVAL);
1944
1945 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1946 hw->channels_min, hw->channels_max);
1947 snd_assert(err >= 0, return -EINVAL);
1948
1949 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1950 hw->rate_min, hw->rate_max);
1951 snd_assert(err >= 0, return -EINVAL);
1952
1953 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1954 hw->period_bytes_min, hw->period_bytes_max);
1955 snd_assert(err >= 0, return -EINVAL);
1956
1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1958 hw->periods_min, hw->periods_max);
1959 snd_assert(err >= 0, return -EINVAL);
1960
1961 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1962 hw->period_bytes_min, hw->buffer_bytes_max);
1963 snd_assert(err >= 0, return -EINVAL);
1964
1965 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1966 snd_pcm_hw_rule_buffer_bytes_max, substream,
1967 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1968 if (err < 0)
1969 return err;
1970
1971 /* FIXME: remove */
1972 if (runtime->dma_bytes) {
1973 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1974 snd_assert(err >= 0, return -EINVAL);
1975 }
1976
1977 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1978 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1979 snd_pcm_hw_rule_rate, hw,
1980 SNDRV_PCM_HW_PARAM_RATE, -1);
1981 if (err < 0)
1982 return err;
1983 }
1984
1985 /* FIXME: this belong to lowlevel */
1da177e4
LT		 1986 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1987
1988 return 0;
1989}
1990
3bf75f9b 1991static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 1992{
1da177e4 1993 snd_pcm_unlink(substream);
3bf75f9b
TI		 1994}
1995
1996void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1997{
0df63e44
TI		 1998 substream->ref_count--;
1999 if (substream->ref_count > 0)
2000 return;
2001
3bf75f9b 2002 snd_pcm_drop(substream);
3bf75f9b 2003 if (substream->hw_opened) {
1da177e4
LT		 2004 if (substream->ops->hw_free != NULL)
2005 substream->ops->hw_free(substream);
2006 substream->ops->close(substream);
3bf75f9b 2007 substream->hw_opened = 0;
1da177e4 2008 }
1576274d
TI		 2009 if (substream->pcm_release) {
2010 substream->pcm_release(substream);
2011 substream->pcm_release = NULL;
2012 }
3bf75f9b
TI		 2013 snd_pcm_detach_substream(substream);
2014}
2015
e88e8ae6
TI		 2016EXPORT_SYMBOL(snd_pcm_release_substream);
2017
3bf75f9b
TI		 2018int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2019 struct file *file,
2020 struct snd_pcm_substream **rsubstream)
2021{
2022 struct snd_pcm_substream *substream;
2023 int err;
2024
2025 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2026 if (err < 0)
2027 return err;
0df63e44
TI		 2028 if (substream->ref_count > 1) {
2029 *rsubstream = substream;
2030 return 0;
2031 }
2032
3bf75f9b
TI		 2033 err = snd_pcm_hw_constraints_init(substream);
2034 if (err < 0) {
2035 snd_printd("snd_pcm_hw_constraints_init failed\n");
2036 goto error;
2037 }
2038
2039 if ((err = substream->ops->open(substream)) < 0)
2040 goto error;
2041
2042 substream->hw_opened = 1;
2043
2044 err = snd_pcm_hw_constraints_complete(substream);
2045 if (err < 0) {
2046 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2047 goto error;
2048 }
2049
2050 *rsubstream = substream;
1da177e4 2051 return 0;
3bf75f9b
TI		 2052
2053 error:
2054 snd_pcm_release_substream(substream);
2055 return err;
1da177e4
LT		 2056}
2057
e88e8ae6
TI		 2058EXPORT_SYMBOL(snd_pcm_open_substream);
2059
1da177e4 2060static int snd_pcm_open_file(struct file *file,
877211f5 2061 struct snd_pcm *pcm,
1da177e4 2062 int stream,
877211f5 2063 struct snd_pcm_file **rpcm_file)
1da177e4 2064{
877211f5
TI		 2065 struct snd_pcm_file *pcm_file;
2066 struct snd_pcm_substream *substream;
2067 struct snd_pcm_str *str;
3bf75f9b 2068 int err;
1da177e4
LT		 2069
2070 snd_assert(rpcm_file != NULL, return -EINVAL);
2071 *rpcm_file = NULL;
2072
3bf75f9b
TI		 2073 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2074 if (err < 0)
2075 return err;
2076
548a648b
TI		 2077 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2078 if (pcm_file == NULL) {
2079 snd_pcm_release_substream(substream);
2080 return -ENOMEM;
2081 }
2082 pcm_file->substream = substream;
2083 if (substream->ref_count == 1) {
0df63e44
TI		 2084 str = substream->pstr;
2085 substream->file = pcm_file;
2086 substream->pcm_release = pcm_release_private;
1da177e4 2087 }
1da177e4
LT		 2088 file->private_data = pcm_file;
2089 *rpcm_file = pcm_file;
2090 return 0;
2091}
2092
f87135f5
CL		 2093static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2094{
2095 struct snd_pcm *pcm;
2096
2097 pcm = snd_lookup_minor_data(iminor(inode),
2098 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2099 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2100}
2101
2102static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2103{
877211f5 2104 struct snd_pcm *pcm;
f87135f5
CL		 2105
2106 pcm = snd_lookup_minor_data(iminor(inode),
2107 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2108 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2109}
2110
2111static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2112{
2113 int err;
877211f5 2114 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2115 wait_queue_t wait;
2116
1da177e4
LT		 2117 if (pcm == NULL) {
2118 err = -ENODEV;
2119 goto __error1;
2120 }
2121 err = snd_card_file_add(pcm->card, file);
2122 if (err < 0)
2123 goto __error1;
2124 if (!try_module_get(pcm->card->module)) {
2125 err = -EFAULT;
2126 goto __error2;
2127 }
2128 init_waitqueue_entry(&wait, current);
2129 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2130 mutex_lock(&pcm->open_mutex);
1da177e4 2131 while (1) {
f87135f5 2132 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
1da177e4
LT		 2133 if (err >= 0)
2134 break;
2135 if (err == -EAGAIN) {
2136 if (file->f_flags & O_NONBLOCK) {
2137 err = -EBUSY;
2138 break;
2139 }
2140 } else
2141 break;
2142 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2143 mutex_unlock(&pcm->open_mutex);
1da177e4 2144 schedule();
1a60d4c5 2145 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2146 if (signal_pending(current)) {
2147 err = -ERESTARTSYS;
2148 break;
2149 }
2150 }
2151 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2152 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2153 if (err < 0)
2154 goto __error;
2155 return err;
2156
2157 __error:
2158 module_put(pcm->card->module);
2159 __error2:
2160 snd_card_file_remove(pcm->card, file);
2161 __error1:
2162 return err;
2163}
2164
2165static int snd_pcm_release(struct inode *inode, struct file *file)
2166{
877211f5
TI		 2167 struct snd_pcm *pcm;
2168 struct snd_pcm_substream *substream;
2169 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2170
2171 pcm_file = file->private_data;
2172 substream = pcm_file->substream;
2173 snd_assert(substream != NULL, return -ENXIO);
1da177e4 2174 pcm = substream->pcm;
1da177e4 2175 fasync_helper(-1, file, 0, &substream->runtime->fasync);
1a60d4c5 2176 mutex_lock(&pcm->open_mutex);
3bf75f9b 2177 snd_pcm_release_substream(substream);
548a648b 2178 kfree(pcm_file);
1a60d4c5 2179 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2180 wake_up(&pcm->open_wait);
2181 module_put(pcm->card->module);
2182 snd_card_file_remove(pcm->card, file);
2183 return 0;
2184}
2185
877211f5
TI		 2186static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2187 snd_pcm_uframes_t frames)
1da177e4 2188{
877211f5 2189 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2190 snd_pcm_sframes_t appl_ptr;
2191 snd_pcm_sframes_t ret;
2192 snd_pcm_sframes_t hw_avail;
2193
2194 if (frames == 0)
2195 return 0;
2196
2197 snd_pcm_stream_lock_irq(substream);
2198 switch (runtime->status->state) {
2199 case SNDRV_PCM_STATE_PREPARED:
2200 break;
2201 case SNDRV_PCM_STATE_DRAINING:
2202 case SNDRV_PCM_STATE_RUNNING:
2203 if (snd_pcm_update_hw_ptr(substream) >= 0)
2204 break;
2205 /* Fall through */
2206 case SNDRV_PCM_STATE_XRUN:
2207 ret = -EPIPE;
2208 goto __end;
2209 default:
2210 ret = -EBADFD;
2211 goto __end;
2212 }
2213
2214 hw_avail = snd_pcm_playback_hw_avail(runtime);
2215 if (hw_avail <= 0) {
2216 ret = 0;
2217 goto __end;
2218 }
2219 if (frames > (snd_pcm_uframes_t)hw_avail)
2220 frames = hw_avail;
1da177e4
LT		 2221 appl_ptr = runtime->control->appl_ptr - frames;
2222 if (appl_ptr < 0)
2223 appl_ptr += runtime->boundary;
2224 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2225 ret = frames;
2226 __end:
2227 snd_pcm_stream_unlock_irq(substream);
2228 return ret;
2229}
2230
877211f5
TI		 2231static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2232 snd_pcm_uframes_t frames)
1da177e4 2233{
877211f5 2234 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2235 snd_pcm_sframes_t appl_ptr;
2236 snd_pcm_sframes_t ret;
2237 snd_pcm_sframes_t hw_avail;
2238
2239 if (frames == 0)
2240 return 0;
2241
2242 snd_pcm_stream_lock_irq(substream);
2243 switch (runtime->status->state) {
2244 case SNDRV_PCM_STATE_PREPARED:
2245 case SNDRV_PCM_STATE_DRAINING:
2246 break;
2247 case SNDRV_PCM_STATE_RUNNING:
2248 if (snd_pcm_update_hw_ptr(substream) >= 0)
2249 break;
2250 /* Fall through */
2251 case SNDRV_PCM_STATE_XRUN:
2252 ret = -EPIPE;
2253 goto __end;
2254 default:
2255 ret = -EBADFD;
2256 goto __end;
2257 }
2258
2259 hw_avail = snd_pcm_capture_hw_avail(runtime);
2260 if (hw_avail <= 0) {
2261 ret = 0;
2262 goto __end;
2263 }
2264 if (frames > (snd_pcm_uframes_t)hw_avail)
2265 frames = hw_avail;
1da177e4
LT		 2266 appl_ptr = runtime->control->appl_ptr - frames;
2267 if (appl_ptr < 0)
2268 appl_ptr += runtime->boundary;
2269 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2270 ret = frames;
2271 __end:
2272 snd_pcm_stream_unlock_irq(substream);
2273 return ret;
2274}
2275
877211f5
TI		 2276static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2277 snd_pcm_uframes_t frames)
1da177e4 2278{
877211f5 2279 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2280 snd_pcm_sframes_t appl_ptr;
2281 snd_pcm_sframes_t ret;
2282 snd_pcm_sframes_t avail;
2283
2284 if (frames == 0)
2285 return 0;
2286
2287 snd_pcm_stream_lock_irq(substream);
2288 switch (runtime->status->state) {
2289 case SNDRV_PCM_STATE_PREPARED:
2290 case SNDRV_PCM_STATE_PAUSED:
2291 break;
2292 case SNDRV_PCM_STATE_DRAINING:
2293 case SNDRV_PCM_STATE_RUNNING:
2294 if (snd_pcm_update_hw_ptr(substream) >= 0)
2295 break;
2296 /* Fall through */
2297 case SNDRV_PCM_STATE_XRUN:
2298 ret = -EPIPE;
2299 goto __end;
2300 default:
2301 ret = -EBADFD;
2302 goto __end;
2303 }
2304
2305 avail = snd_pcm_playback_avail(runtime);
2306 if (avail <= 0) {
2307 ret = 0;
2308 goto __end;
2309 }
2310 if (frames > (snd_pcm_uframes_t)avail)
2311 frames = avail;
1da177e4
LT		 2312 appl_ptr = runtime->control->appl_ptr + frames;
2313 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2314 appl_ptr -= runtime->boundary;
2315 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2316 ret = frames;
2317 __end:
2318 snd_pcm_stream_unlock_irq(substream);
2319 return ret;
2320}
2321
877211f5
TI		 2322static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2323 snd_pcm_uframes_t frames)
1da177e4 2324{
877211f5 2325 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2326 snd_pcm_sframes_t appl_ptr;
2327 snd_pcm_sframes_t ret;
2328 snd_pcm_sframes_t avail;
2329
2330 if (frames == 0)
2331 return 0;
2332
2333 snd_pcm_stream_lock_irq(substream);
2334 switch (runtime->status->state) {
2335 case SNDRV_PCM_STATE_PREPARED:
2336 case SNDRV_PCM_STATE_DRAINING:
2337 case SNDRV_PCM_STATE_PAUSED:
2338 break;
2339 case SNDRV_PCM_STATE_RUNNING:
2340 if (snd_pcm_update_hw_ptr(substream) >= 0)
2341 break;
2342 /* Fall through */
2343 case SNDRV_PCM_STATE_XRUN:
2344 ret = -EPIPE;
2345 goto __end;
2346 default:
2347 ret = -EBADFD;
2348 goto __end;
2349 }
2350
2351 avail = snd_pcm_capture_avail(runtime);
2352 if (avail <= 0) {
2353 ret = 0;
2354 goto __end;
2355 }
2356 if (frames > (snd_pcm_uframes_t)avail)
2357 frames = avail;
1da177e4
LT		 2358 appl_ptr = runtime->control->appl_ptr + frames;
2359 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2360 appl_ptr -= runtime->boundary;
2361 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2362 ret = frames;
2363 __end:
2364 snd_pcm_stream_unlock_irq(substream);
2365 return ret;
2366}
2367
877211f5 2368static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2369{
877211f5 2370 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2371 int err;
2372
2373 snd_pcm_stream_lock_irq(substream);
2374 switch (runtime->status->state) {
2375 case SNDRV_PCM_STATE_DRAINING:
2376 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2377 goto __badfd;
2378 case SNDRV_PCM_STATE_RUNNING:
2379 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2380 break;
2381 /* Fall through */
2382 case SNDRV_PCM_STATE_PREPARED:
2383 case SNDRV_PCM_STATE_SUSPENDED:
2384 err = 0;
2385 break;
2386 case SNDRV_PCM_STATE_XRUN:
2387 err = -EPIPE;
2388 break;
2389 default:
2390 __badfd:
2391 err = -EBADFD;
2392 break;
2393 }
2394 snd_pcm_stream_unlock_irq(substream);
2395 return err;
2396}
2397
877211f5
TI		 2398static int snd_pcm_delay(struct snd_pcm_substream *substream,
2399 snd_pcm_sframes_t __user *res)
1da177e4 2400{
877211f5 2401 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2402 int err;
2403 snd_pcm_sframes_t n = 0;
2404
2405 snd_pcm_stream_lock_irq(substream);
2406 switch (runtime->status->state) {
2407 case SNDRV_PCM_STATE_DRAINING:
2408 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2409 goto __badfd;
2410 case SNDRV_PCM_STATE_RUNNING:
2411 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2412 break;
2413 /* Fall through */
2414 case SNDRV_PCM_STATE_PREPARED:
2415 case SNDRV_PCM_STATE_SUSPENDED:
2416 err = 0;
2417 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2418 n = snd_pcm_playback_hw_avail(runtime);
2419 else
2420 n = snd_pcm_capture_avail(runtime);
2421 break;
2422 case SNDRV_PCM_STATE_XRUN:
2423 err = -EPIPE;
2424 break;
2425 default:
2426 __badfd:
2427 err = -EBADFD;
2428 break;
2429 }
2430 snd_pcm_stream_unlock_irq(substream);
2431 if (!err)
2432 if (put_user(n, res))
2433 err = -EFAULT;
2434 return err;
2435}
2436
877211f5
TI		 2437static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2438 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2439{
877211f5
TI		 2440 struct snd_pcm_runtime *runtime = substream->runtime;
2441 struct snd_pcm_sync_ptr sync_ptr;
2442 volatile struct snd_pcm_mmap_status *status;
2443 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2444 int err;
2445
2446 memset(&sync_ptr, 0, sizeof(sync_ptr));
2447 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2448 return -EFAULT;
877211f5 2449 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2450 return -EFAULT;
2451 status = runtime->status;
2452 control = runtime->control;
2453 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2454 err = snd_pcm_hwsync(substream);
2455 if (err < 0)
2456 return err;
2457 }
2458 snd_pcm_stream_lock_irq(substream);
2459 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2460 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2461 else
2462 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2463 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2464 control->avail_min = sync_ptr.c.control.avail_min;
2465 else
2466 sync_ptr.c.control.avail_min = control->avail_min;
2467 sync_ptr.s.status.state = status->state;
2468 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2469 sync_ptr.s.status.tstamp = status->tstamp;
2470 sync_ptr.s.status.suspended_state = status->suspended_state;
2471 snd_pcm_stream_unlock_irq(substream);
2472 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2473 return -EFAULT;
2474 return 0;
2475}
b751eef1
JK		 2476
2477static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2478{
2479 struct snd_pcm_runtime *runtime = substream->runtime;
2480 int arg;
2481
2482 if (get_user(arg, _arg))
2483 return -EFAULT;
2484 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2485 return -EINVAL;
2486 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2487 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2488 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2489 return 0;
2490}
1da177e4 2491
0df63e44
TI		 2492static int snd_pcm_common_ioctl1(struct file *file,
2493 struct snd_pcm_substream *substream,
1da177e4
LT		 2494 unsigned int cmd, void __user *arg)
2495{
2496 snd_assert(substream != NULL, return -ENXIO);
2497
2498 switch (cmd) {
2499 case SNDRV_PCM_IOCTL_PVERSION:
2500 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2501 case SNDRV_PCM_IOCTL_INFO:
2502 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2503 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2504 return 0;
b751eef1
JK		 2505 case SNDRV_PCM_IOCTL_TTSTAMP:
2506 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2507 case SNDRV_PCM_IOCTL_HW_REFINE:
2508 return snd_pcm_hw_refine_user(substream, arg);
2509 case SNDRV_PCM_IOCTL_HW_PARAMS:
2510 return snd_pcm_hw_params_user(substream, arg);
2511 case SNDRV_PCM_IOCTL_HW_FREE:
2512 return snd_pcm_hw_free(substream);
2513 case SNDRV_PCM_IOCTL_SW_PARAMS:
2514 return snd_pcm_sw_params_user(substream, arg);
2515 case SNDRV_PCM_IOCTL_STATUS:
2516 return snd_pcm_status_user(substream, arg);
2517 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2518 return snd_pcm_channel_info_user(substream, arg);
2519 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2520 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2521 case SNDRV_PCM_IOCTL_RESET:
2522 return snd_pcm_reset(substream);
2523 case SNDRV_PCM_IOCTL_START:
2524 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2525 case SNDRV_PCM_IOCTL_LINK:
2526 return snd_pcm_link(substream, (int)(unsigned long) arg);
2527 case SNDRV_PCM_IOCTL_UNLINK:
2528 return snd_pcm_unlink(substream);
2529 case SNDRV_PCM_IOCTL_RESUME:
2530 return snd_pcm_resume(substream);
2531 case SNDRV_PCM_IOCTL_XRUN:
2532 return snd_pcm_xrun(substream);
2533 case SNDRV_PCM_IOCTL_HWSYNC:
2534 return snd_pcm_hwsync(substream);
2535 case SNDRV_PCM_IOCTL_DELAY:
2536 return snd_pcm_delay(substream, arg);
2537 case SNDRV_PCM_IOCTL_SYNC_PTR:
2538 return snd_pcm_sync_ptr(substream, arg);
59d48582 2539#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2540 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2541 return snd_pcm_hw_refine_old_user(substream, arg);
2542 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2543 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2544#endif
1da177e4
LT		 2545 case SNDRV_PCM_IOCTL_DRAIN:
2546 return snd_pcm_drain(substream);
2547 case SNDRV_PCM_IOCTL_DROP:
2548 return snd_pcm_drop(substream);
e661d0dd
TI		 2549 case SNDRV_PCM_IOCTL_PAUSE:
2550 {
2551 int res;
2552 snd_pcm_stream_lock_irq(substream);
2553 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2554 snd_pcm_stream_unlock_irq(substream);
2555 return res;
2556 }
1da177e4
LT		 2557 }
2558 snd_printd("unknown ioctl = 0x%x\n", cmd);
2559 return -ENOTTY;
2560}
2561
0df63e44
TI		 2562static int snd_pcm_playback_ioctl1(struct file *file,
2563 struct snd_pcm_substream *substream,
1da177e4
LT		 2564 unsigned int cmd, void __user *arg)
2565{
2566 snd_assert(substream != NULL, return -ENXIO);
2567 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2568 switch (cmd) {
2569 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2570 {
877211f5
TI		 2571 struct snd_xferi xferi;
2572 struct snd_xferi __user *_xferi = arg;
2573 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2574 snd_pcm_sframes_t result;
2575 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2576 return -EBADFD;
2577 if (put_user(0, &_xferi->result))
2578 return -EFAULT;
2579 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2580 return -EFAULT;
2581 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2582 __put_user(result, &_xferi->result);
2583 return result < 0 ? result : 0;
2584 }
2585 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2586 {
877211f5
TI		 2587 struct snd_xfern xfern;
2588 struct snd_xfern __user *_xfern = arg;
2589 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2590 void __user **bufs;
2591 snd_pcm_sframes_t result;
2592 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2593 return -EBADFD;
2594 if (runtime->channels > 128)
2595 return -EINVAL;
2596 if (put_user(0, &_xfern->result))
2597 return -EFAULT;
2598 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2599 return -EFAULT;
2600 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2601 if (bufs == NULL)
2602 return -ENOMEM;
2603 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2604 kfree(bufs);
2605 return -EFAULT;
2606 }
2607 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2608 kfree(bufs);
2609 __put_user(result, &_xfern->result);
2610 return result < 0 ? result : 0;
2611 }
2612 case SNDRV_PCM_IOCTL_REWIND:
2613 {
2614 snd_pcm_uframes_t frames;
2615 snd_pcm_uframes_t __user *_frames = arg;
2616 snd_pcm_sframes_t result;
2617 if (get_user(frames, _frames))
2618 return -EFAULT;
2619 if (put_user(0, _frames))
2620 return -EFAULT;
2621 result = snd_pcm_playback_rewind(substream, frames);
2622 __put_user(result, _frames);
2623 return result < 0 ? result : 0;
2624 }
2625 case SNDRV_PCM_IOCTL_FORWARD:
2626 {
2627 snd_pcm_uframes_t frames;
2628 snd_pcm_uframes_t __user *_frames = arg;
2629 snd_pcm_sframes_t result;
2630 if (get_user(frames, _frames))
2631 return -EFAULT;
2632 if (put_user(0, _frames))
2633 return -EFAULT;
2634 result = snd_pcm_playback_forward(substream, frames);
2635 __put_user(result, _frames);
2636 return result < 0 ? result : 0;
2637 }
1da177e4 2638 }
0df63e44 2639 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2640}
2641
0df63e44
TI		 2642static int snd_pcm_capture_ioctl1(struct file *file,
2643 struct snd_pcm_substream *substream,
1da177e4
LT		 2644 unsigned int cmd, void __user *arg)
2645{
2646 snd_assert(substream != NULL, return -ENXIO);
2647 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2648 switch (cmd) {
2649 case SNDRV_PCM_IOCTL_READI_FRAMES:
2650 {
877211f5
TI		 2651 struct snd_xferi xferi;
2652 struct snd_xferi __user *_xferi = arg;
2653 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2654 snd_pcm_sframes_t result;
2655 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2656 return -EBADFD;
2657 if (put_user(0, &_xferi->result))
2658 return -EFAULT;
2659 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2660 return -EFAULT;
2661 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2662 __put_user(result, &_xferi->result);
2663 return result < 0 ? result : 0;
2664 }
2665 case SNDRV_PCM_IOCTL_READN_FRAMES:
2666 {
877211f5
TI		 2667 struct snd_xfern xfern;
2668 struct snd_xfern __user *_xfern = arg;
2669 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2670 void *bufs;
2671 snd_pcm_sframes_t result;
2672 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2673 return -EBADFD;
2674 if (runtime->channels > 128)
2675 return -EINVAL;
2676 if (put_user(0, &_xfern->result))
2677 return -EFAULT;
2678 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2679 return -EFAULT;
2680 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2681 if (bufs == NULL)
2682 return -ENOMEM;
2683 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2684 kfree(bufs);
2685 return -EFAULT;
2686 }
2687 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2688 kfree(bufs);
2689 __put_user(result, &_xfern->result);
2690 return result < 0 ? result : 0;
2691 }
2692 case SNDRV_PCM_IOCTL_REWIND:
2693 {
2694 snd_pcm_uframes_t frames;
2695 snd_pcm_uframes_t __user *_frames = arg;
2696 snd_pcm_sframes_t result;
2697 if (get_user(frames, _frames))
2698 return -EFAULT;
2699 if (put_user(0, _frames))
2700 return -EFAULT;
2701 result = snd_pcm_capture_rewind(substream, frames);
2702 __put_user(result, _frames);
2703 return result < 0 ? result : 0;
2704 }
2705 case SNDRV_PCM_IOCTL_FORWARD:
2706 {
2707 snd_pcm_uframes_t frames;
2708 snd_pcm_uframes_t __user *_frames = arg;
2709 snd_pcm_sframes_t result;
2710 if (get_user(frames, _frames))
2711 return -EFAULT;
2712 if (put_user(0, _frames))
2713 return -EFAULT;
2714 result = snd_pcm_capture_forward(substream, frames);
2715 __put_user(result, _frames);
2716 return result < 0 ? result : 0;
2717 }
2718 }
0df63e44 2719 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2720}
2721
877211f5
TI		 2722static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2723 unsigned long arg)
1da177e4 2724{
877211f5 2725 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2726
2727 pcm_file = file->private_data;
2728
2729 if (((cmd >> 8) & 0xff) != 'A')
2730 return -ENOTTY;
2731
0df63e44
TI		 2732 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2733 (void __user *)arg);
1da177e4
LT		 2734}
2735
877211f5
TI		 2736static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2737 unsigned long arg)
1da177e4 2738{
877211f5 2739 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2740
2741 pcm_file = file->private_data;
2742
2743 if (((cmd >> 8) & 0xff) != 'A')
2744 return -ENOTTY;
2745
0df63e44
TI		 2746 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2747 (void __user *)arg);
1da177e4
LT		 2748}
2749
bf1bbb5a
TI		 2750int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2751 unsigned int cmd, void *arg)
1da177e4
LT		 2752{
2753 mm_segment_t fs;
2754 int result;
2755
2756 fs = snd_enter_user();
1da177e4
LT		 2757 switch (substream->stream) {
2758 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2759 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2760 (void __user *)arg);
bf1bbb5a 2761 break;
1da177e4 2762 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2763 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2764 (void __user *)arg);
bf1bbb5a 2765 break;
1da177e4 2766 default:
bf1bbb5a
TI		 2767 result = -EINVAL;
2768 break;
1da177e4 2769 }
bf1bbb5a
TI		 2770 snd_leave_user(fs);
2771 return result;
1da177e4
LT		 2772}
2773
e88e8ae6
TI		 2774EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2775
877211f5
TI		 2776static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2777 loff_t * offset)
1da177e4 2778{
877211f5
TI		 2779 struct snd_pcm_file *pcm_file;
2780 struct snd_pcm_substream *substream;
2781 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2782 snd_pcm_sframes_t result;
2783
2784 pcm_file = file->private_data;
2785 substream = pcm_file->substream;
2786 snd_assert(substream != NULL, return -ENXIO);
2787 runtime = substream->runtime;
2788 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2789 return -EBADFD;
2790 if (!frame_aligned(runtime, count))
2791 return -EINVAL;
2792 count = bytes_to_frames(runtime, count);
2793 result = snd_pcm_lib_read(substream, buf, count);
2794 if (result > 0)
2795 result = frames_to_bytes(runtime, result);
2796 return result;
2797}
2798
877211f5
TI		 2799static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2800 size_t count, loff_t * offset)
1da177e4 2801{
877211f5
TI		 2802 struct snd_pcm_file *pcm_file;
2803 struct snd_pcm_substream *substream;
2804 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2805 snd_pcm_sframes_t result;
2806
2807 pcm_file = file->private_data;
2808 substream = pcm_file->substream;
2809 snd_assert(substream != NULL, result = -ENXIO; goto end);
2810 runtime = substream->runtime;
2811 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2812 result = -EBADFD;
2813 goto end;
2814 }
2815 if (!frame_aligned(runtime, count)) {
2816 result = -EINVAL;
2817 goto end;
2818 }
2819 count = bytes_to_frames(runtime, count);
2820 result = snd_pcm_lib_write(substream, buf, count);
2821 if (result > 0)
2822 result = frames_to_bytes(runtime, result);
2823 end:
2824 return result;
2825}
2826
ee0b3e67
BP		 2827static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2828 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2829
2830{
877211f5
TI		 2831 struct snd_pcm_file *pcm_file;
2832 struct snd_pcm_substream *substream;
2833 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2834 snd_pcm_sframes_t result;
2835 unsigned long i;
2836 void __user **bufs;
2837 snd_pcm_uframes_t frames;
2838
ee0b3e67 2839 pcm_file = iocb->ki_filp->private_data;
1da177e4
LT		 2840 substream = pcm_file->substream;
2841 snd_assert(substream != NULL, return -ENXIO);
2842 runtime = substream->runtime;
2843 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2844 return -EBADFD;
ee0b3e67 2845 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2846 return -EINVAL;
ee0b3e67 2847 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2848 return -EINVAL;
ee0b3e67
BP		 2849 frames = bytes_to_samples(runtime, iov->iov_len);
2850 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2851 if (bufs == NULL)
2852 return -ENOMEM;
ee0b3e67
BP		 2853 for (i = 0; i < nr_segs; ++i)
2854 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2855 result = snd_pcm_lib_readv(substream, bufs, frames);
2856 if (result > 0)
2857 result = frames_to_bytes(runtime, result);
2858 kfree(bufs);
2859 return result;
2860}
2861
ee0b3e67
BP		 2862static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2863 unsigned long nr_segs, loff_t pos)
1da177e4 2864{
877211f5
TI		 2865 struct snd_pcm_file *pcm_file;
2866 struct snd_pcm_substream *substream;
2867 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2868 snd_pcm_sframes_t result;
2869 unsigned long i;
2870 void __user **bufs;
2871 snd_pcm_uframes_t frames;
2872
ee0b3e67 2873 pcm_file = iocb->ki_filp->private_data;
1da177e4
LT		 2874 substream = pcm_file->substream;
2875 snd_assert(substream != NULL, result = -ENXIO; goto end);
2876 runtime = substream->runtime;
2877 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2878 result = -EBADFD;
2879 goto end;
2880 }
ee0b3e67
BP		 2881 if (nr_segs > 128 || nr_segs != runtime->channels ||
2882 !frame_aligned(runtime, iov->iov_len)) {
1da177e4
LT		 2883 result = -EINVAL;
2884 goto end;
2885 }
ee0b3e67
BP		 2886 frames = bytes_to_samples(runtime, iov->iov_len);
2887 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2888 if (bufs == NULL)
2889 return -ENOMEM;
ee0b3e67
BP		 2890 for (i = 0; i < nr_segs; ++i)
2891 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2892 result = snd_pcm_lib_writev(substream, bufs, frames);
2893 if (result > 0)
2894 result = frames_to_bytes(runtime, result);
2895 kfree(bufs);
2896 end:
2897 return result;
2898}
2899
2900static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2901{
877211f5
TI		 2902 struct snd_pcm_file *pcm_file;
2903 struct snd_pcm_substream *substream;
2904 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2905 unsigned int mask;
2906 snd_pcm_uframes_t avail;
2907
2908 pcm_file = file->private_data;
2909
2910 substream = pcm_file->substream;
2911 snd_assert(substream != NULL, return -ENXIO);
2912 runtime = substream->runtime;
2913
2914 poll_wait(file, &runtime->sleep, wait);
2915
2916 snd_pcm_stream_lock_irq(substream);
2917 avail = snd_pcm_playback_avail(runtime);
2918 switch (runtime->status->state) {
2919 case SNDRV_PCM_STATE_RUNNING:
2920 case SNDRV_PCM_STATE_PREPARED:
2921 case SNDRV_PCM_STATE_PAUSED:
2922 if (avail >= runtime->control->avail_min) {
2923 mask = POLLOUT | POLLWRNORM;
2924 break;
2925 }
2926 /* Fall through */
2927 case SNDRV_PCM_STATE_DRAINING:
2928 mask = 0;
2929 break;
2930 default:
2931 mask = POLLOUT | POLLWRNORM | POLLERR;
2932 break;
2933 }
2934 snd_pcm_stream_unlock_irq(substream);
2935 return mask;
2936}
2937
2938static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2939{
877211f5
TI		 2940 struct snd_pcm_file *pcm_file;
2941 struct snd_pcm_substream *substream;
2942 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2943 unsigned int mask;
2944 snd_pcm_uframes_t avail;
2945
2946 pcm_file = file->private_data;
2947
2948 substream = pcm_file->substream;
2949 snd_assert(substream != NULL, return -ENXIO);
2950 runtime = substream->runtime;
2951
2952 poll_wait(file, &runtime->sleep, wait);
2953
2954 snd_pcm_stream_lock_irq(substream);
2955 avail = snd_pcm_capture_avail(runtime);
2956 switch (runtime->status->state) {
2957 case SNDRV_PCM_STATE_RUNNING:
2958 case SNDRV_PCM_STATE_PREPARED:
2959 case SNDRV_PCM_STATE_PAUSED:
2960 if (avail >= runtime->control->avail_min) {
2961 mask = POLLIN | POLLRDNORM;
2962 break;
2963 }
2964 mask = 0;
2965 break;
2966 case SNDRV_PCM_STATE_DRAINING:
2967 if (avail > 0) {
2968 mask = POLLIN | POLLRDNORM;
2969 break;
2970 }
2971 /* Fall through */
2972 default:
2973 mask = POLLIN | POLLRDNORM | POLLERR;
2974 break;
2975 }
2976 snd_pcm_stream_unlock_irq(substream);
2977 return mask;
2978}
2979
2980/*
2981 * mmap support
2982 */
2983
2984/*
2985 * Only on coherent architectures, we can mmap the status and the control records
2986 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2987 */
2988#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2989/*
2990 * mmap status record
2991 */
3ad5afcd
NP		 2992static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2993 struct vm_fault *vmf)
1da177e4 2994{
877211f5
TI		 2995 struct snd_pcm_substream *substream = area->vm_private_data;
2996 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2997
2998 if (substream == NULL)
3ad5afcd 2999 return VM_FAULT_SIGBUS;
1da177e4 3000 runtime = substream->runtime;
3ad5afcd
NP		 3001 vmf->page = virt_to_page(runtime->status);
3002 get_page(vmf->page);
3003 return 0;
1da177e4
LT		 3004}
3005
3006static struct vm_operations_struct snd_pcm_vm_ops_status =
3007{
3ad5afcd 3008 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3009};
3010
877211f5 3011static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3012 struct vm_area_struct *area)
3013{
877211f5 3014 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3015 long size;
3016 if (!(area->vm_flags & VM_READ))
3017 return -EINVAL;
3018 runtime = substream->runtime;
3019 snd_assert(runtime != NULL, return -EAGAIN);
3020 size = area->vm_end - area->vm_start;
877211f5 3021 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3022 return -EINVAL;
3023 area->vm_ops = &snd_pcm_vm_ops_status;
3024 area->vm_private_data = substream;
3025 area->vm_flags |= VM_RESERVED;
3026 return 0;
3027}
3028
3029/*
3030 * mmap control record
3031 */
3ad5afcd
NP		 3032static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3033 struct vm_fault *vmf)
1da177e4 3034{
877211f5
TI		 3035 struct snd_pcm_substream *substream = area->vm_private_data;
3036 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3037
3038 if (substream == NULL)
3ad5afcd 3039 return VM_FAULT_SIGBUS;
1da177e4 3040 runtime = substream->runtime;
3ad5afcd
NP		 3041 vmf->page = virt_to_page(runtime->control);
3042 get_page(vmf->page);
3043 return 0;
1da177e4
LT		 3044}
3045
3046static struct vm_operations_struct snd_pcm_vm_ops_control =
3047{
3ad5afcd 3048 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3049};
3050
877211f5 3051static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3052 struct vm_area_struct *area)
3053{
877211f5 3054 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3055 long size;
3056 if (!(area->vm_flags & VM_READ))
3057 return -EINVAL;
3058 runtime = substream->runtime;
3059 snd_assert(runtime != NULL, return -EAGAIN);
3060 size = area->vm_end - area->vm_start;
877211f5 3061 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3062 return -EINVAL;
3063 area->vm_ops = &snd_pcm_vm_ops_control;
3064 area->vm_private_data = substream;
3065 area->vm_flags |= VM_RESERVED;
3066 return 0;
3067}
3068#else /* ! coherent mmap */
3069/*
3070 * don't support mmap for status and control records.
3071 */
877211f5 3072static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3073 struct vm_area_struct *area)
3074{
3075 return -ENXIO;
3076}
877211f5 3077static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3078 struct vm_area_struct *area)
3079{
3080 return -ENXIO;
3081}
3082#endif /* coherent mmap */
3083
3084/*
3ad5afcd 3085 * fault callback for mmapping a RAM page
1da177e4 3086 */
3ad5afcd
NP		 3087static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3088 struct vm_fault *vmf)
1da177e4 3089{
877211f5
TI		 3090 struct snd_pcm_substream *substream = area->vm_private_data;
3091 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3092 unsigned long offset;
3093 struct page * page;
3094 void *vaddr;
3095 size_t dma_bytes;
3096
3097 if (substream == NULL)
3ad5afcd 3098 return VM_FAULT_SIGBUS;
1da177e4 3099 runtime = substream->runtime;
3ad5afcd 3100 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3101 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3102 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3103 return VM_FAULT_SIGBUS;
1da177e4
LT		 3104 if (substream->ops->page) {
3105 page = substream->ops->page(substream, offset);
3ad5afcd
NP		 3106 if (!page)
3107 return VM_FAULT_SIGBUS;
1da177e4
LT		 3108 } else {
3109 vaddr = runtime->dma_area + offset;
3110 page = virt_to_page(vaddr);
3111 }
b5810039 3112 get_page(page);
3ad5afcd
NP		 3113 vmf->page = page;
3114 return 0;
1da177e4
LT		 3115}
3116
3117static struct vm_operations_struct snd_pcm_vm_ops_data =
3118{
3119 .open = snd_pcm_mmap_data_open,
3120 .close = snd_pcm_mmap_data_close,
3ad5afcd 3121 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3122};
3123
3124/*
3125 * mmap the DMA buffer on RAM
3126 */
877211f5
TI		 3127static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3128 struct vm_area_struct *area)
1da177e4
LT		 3129{
3130 area->vm_ops = &snd_pcm_vm_ops_data;
3131 area->vm_private_data = substream;
3132 area->vm_flags |= VM_RESERVED;
9c323fcb 3133 atomic_inc(&substream->mmap_count);
1da177e4
LT		 3134 return 0;
3135}
3136
3137/*
3138 * mmap the DMA buffer on I/O memory area
3139 */
3140#if SNDRV_PCM_INFO_MMAP_IOMEM
3141static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3142{
3143 .open = snd_pcm_mmap_data_open,
3144 .close = snd_pcm_mmap_data_close,
3145};
3146
877211f5
TI		 3147int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3148 struct vm_area_struct *area)
1da177e4
LT		 3149{
3150 long size;
3151 unsigned long offset;
3152
3153#ifdef pgprot_noncached
3154 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3155#endif
3156 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3157 area->vm_private_data = substream;
3158 area->vm_flags |= VM_IO;
3159 size = area->vm_end - area->vm_start;
3160 offset = area->vm_pgoff << PAGE_SHIFT;
3161 if (io_remap_pfn_range(area, area->vm_start,
3162 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3163 size, area->vm_page_prot))
3164 return -EAGAIN;
9c323fcb 3165 atomic_inc(&substream->mmap_count);
1da177e4
LT		 3166 return 0;
3167}
e88e8ae6
TI		 3168
3169EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3170#endif /* SNDRV_PCM_INFO_MMAP */
3171
3172/*
3173 * mmap DMA buffer
3174 */
877211f5 3175int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3176 struct vm_area_struct *area)
3177{
877211f5 3178 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3179 long size;
3180 unsigned long offset;
3181 size_t dma_bytes;
3182
3183 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3184 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3185 return -EINVAL;
3186 } else {
3187 if (!(area->vm_flags & VM_READ))
3188 return -EINVAL;
3189 }
3190 runtime = substream->runtime;
3191 snd_assert(runtime != NULL, return -EAGAIN);
3192 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3193 return -EBADFD;
3194 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3195 return -ENXIO;
3196 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3197 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3198 return -EINVAL;
3199 size = area->vm_end - area->vm_start;
3200 offset = area->vm_pgoff << PAGE_SHIFT;
3201 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3202 if ((size_t)size > dma_bytes)
3203 return -EINVAL;
3204 if (offset > dma_bytes - size)
3205 return -EINVAL;
3206
3207 if (substream->ops->mmap)
3208 return substream->ops->mmap(substream, area);
3209 else
3210 return snd_pcm_default_mmap(substream, area);
3211}
3212
e88e8ae6
TI		 3213EXPORT_SYMBOL(snd_pcm_mmap_data);
3214
1da177e4
LT		 3215static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3216{
877211f5
TI		 3217 struct snd_pcm_file * pcm_file;
3218 struct snd_pcm_substream *substream;
1da177e4
LT		 3219 unsigned long offset;
3220
3221 pcm_file = file->private_data;
3222 substream = pcm_file->substream;
3223 snd_assert(substream != NULL, return -ENXIO);
3224
3225 offset = area->vm_pgoff << PAGE_SHIFT;
3226 switch (offset) {
3227 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3228 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3229 return -ENXIO;
3230 return snd_pcm_mmap_status(substream, file, area);
3231 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3232 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3233 return -ENXIO;
3234 return snd_pcm_mmap_control(substream, file, area);
3235 default:
3236 return snd_pcm_mmap_data(substream, file, area);
3237 }
3238 return 0;
3239}
3240
3241static int snd_pcm_fasync(int fd, struct file * file, int on)
3242{
877211f5
TI		 3243 struct snd_pcm_file * pcm_file;
3244 struct snd_pcm_substream *substream;
3245 struct snd_pcm_runtime *runtime;
2db9f0a3 3246 int err = -ENXIO;
1da177e4 3247
2db9f0a3 3248 lock_kernel();
1da177e4
LT		 3249 pcm_file = file->private_data;
3250 substream = pcm_file->substream;
2db9f0a3 3251 snd_assert(substream != NULL, goto out);
1da177e4
LT		 3252 runtime = substream->runtime;
3253
3254 err = fasync_helper(fd, file, on, &runtime->fasync);
685d87f7 3255out:
2db9f0a3 3256 unlock_kernel();
1da177e4
LT		 3257 if (err < 0)
3258 return err;
3259 return 0;
3260}
3261
3262/*
3263 * ioctl32 compat
3264 */
3265#ifdef CONFIG_COMPAT
3266#include "pcm_compat.c"
3267#else
3268#define snd_pcm_ioctl_compat NULL
3269#endif
3270
3271/*
3272 * To be removed helpers to keep binary compatibility
3273 */
3274
59d48582 3275#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3276#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3277#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3278
877211f5
TI		 3279static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3280 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3281{
3282 unsigned int i;
3283
3284 memset(params, 0, sizeof(*params));
3285 params->flags = oparams->flags;
3286 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3287 params->masks[i].bits[0] = oparams->masks[i];
3288 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3289 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3290 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3291 params->info = oparams->info;
3292 params->msbits = oparams->msbits;
3293 params->rate_num = oparams->rate_num;
3294 params->rate_den = oparams->rate_den;
3295 params->fifo_size = oparams->fifo_size;
3296}
3297
877211f5
TI		 3298static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3299 struct snd_pcm_hw_params *params)
1da177e4
LT		 3300{
3301 unsigned int i;
3302
3303 memset(oparams, 0, sizeof(*oparams));
3304 oparams->flags = params->flags;
3305 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3306 oparams->masks[i] = params->masks[i].bits[0];
3307 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3308 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3309 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3310 oparams->info = params->info;
3311 oparams->msbits = params->msbits;
3312 oparams->rate_num = params->rate_num;
3313 oparams->rate_den = params->rate_den;
3314 oparams->fifo_size = params->fifo_size;
3315}
3316
877211f5
TI		 3317static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3318 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3319{
877211f5
TI		 3320 struct snd_pcm_hw_params *params;
3321 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3322 int err;
3323
3324 params = kmalloc(sizeof(*params), GFP_KERNEL);
3325 if (!params) {
3326 err = -ENOMEM;
3327 goto out;
3328 }
3329 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3330 if (!oparams) {
3331 err = -ENOMEM;
3332 goto out;
3333 }
3334
3335 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3336 err = -EFAULT;
3337 goto out;
3338 }
3339 snd_pcm_hw_convert_from_old_params(params, oparams);
3340 err = snd_pcm_hw_refine(substream, params);
3341 snd_pcm_hw_convert_to_old_params(oparams, params);
3342 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3343 if (!err)
3344 err = -EFAULT;
3345 }
3346out:
3347 kfree(params);
3348 kfree(oparams);
3349 return err;
3350}
3351
877211f5
TI		 3352static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3353 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3354{
877211f5
TI		 3355 struct snd_pcm_hw_params *params;
3356 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3357 int err;
3358
3359 params = kmalloc(sizeof(*params), GFP_KERNEL);
3360 if (!params) {
3361 err = -ENOMEM;
3362 goto out;
3363 }
3364 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3365 if (!oparams) {
3366 err = -ENOMEM;
3367 goto out;
3368 }
3369 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3370 err = -EFAULT;
3371 goto out;
3372 }
3373 snd_pcm_hw_convert_from_old_params(params, oparams);
3374 err = snd_pcm_hw_params(substream, params);
3375 snd_pcm_hw_convert_to_old_params(oparams, params);
3376 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3377 if (!err)
3378 err = -EFAULT;
3379 }
3380out:
3381 kfree(params);
3382 kfree(oparams);
3383 return err;
3384}
59d48582 3385#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4
LT		 3386
3387/*
3388 * Register section
3389 */
3390
9c2e08c5 3391const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3392 {
2af677fc
CL		 3393 .owner = THIS_MODULE,
3394 .write = snd_pcm_write,
ee0b3e67 3395 .aio_write = snd_pcm_aio_write,
f87135f5 3396 .open = snd_pcm_playback_open,
2af677fc
CL		 3397 .release = snd_pcm_release,
3398 .poll = snd_pcm_playback_poll,
3399 .unlocked_ioctl = snd_pcm_playback_ioctl,
3400 .compat_ioctl = snd_pcm_ioctl_compat,
3401 .mmap = snd_pcm_mmap,
3402 .fasync = snd_pcm_fasync,
1da177e4
LT		 3403 },
3404 {
2af677fc
CL		 3405 .owner = THIS_MODULE,
3406 .read = snd_pcm_read,
ee0b3e67 3407 .aio_read = snd_pcm_aio_read,
f87135f5 3408 .open = snd_pcm_capture_open,
2af677fc
CL		 3409 .release = snd_pcm_release,
3410 .poll = snd_pcm_capture_poll,
3411 .unlocked_ioctl = snd_pcm_capture_ioctl,
3412 .compat_ioctl = snd_pcm_ioctl_compat,
3413 .mmap = snd_pcm_mmap,
3414 .fasync = snd_pcm_fasync,
1da177e4
LT		 3415 }
3416};
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