?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 2.6.28.1
[linux/fpc-iii.git] / sound / core / pcm_native.c
bloba789efc9df3971e46b4f2535d57a4329d5b27dc2
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/mm.h>
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.h>
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
42 struct snd_pcm_hw_params_old {
43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
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;
54 snd_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56 };
57
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
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)
61
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66 #endif
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69 /*
70 *
71 */
72
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
75
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
77
78 static 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
85 static inline void snd_leave_user(mm_segment_t fs)
86 {
87 set_fs(fs);
88 }
89
90
91
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
93 {
94 struct snd_pcm_runtime *runtime;
95 struct snd_pcm *pcm = substream->pcm;
96 struct snd_pcm_str *pstr = substream->pstr;
97
98 memset(info, 0, sizeof(*info));
99 info->card = pcm->card->number;
100 info->device = pcm->device;
101 info->stream = substream->stream;
102 info->subdevice = substream->number;
103 strlcpy(info->id, pcm->id, sizeof(info->id));
104 strlcpy(info->name, pcm->name, sizeof(info->name));
105 info->dev_class = pcm->dev_class;
106 info->dev_subclass = pcm->dev_subclass;
107 info->subdevices_count = pstr->substream_count;
108 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
109 strlcpy(info->subname, substream->name, sizeof(info->subname));
110 runtime = substream->runtime;
111 /* AB: FIXME!!! This is definitely nonsense */
112 if (runtime) {
113 info->sync = runtime->sync;
114 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
115 }
116 return 0;
117 }
118
119 int snd_pcm_info_user(struct snd_pcm_substream *substream,
120 struct snd_pcm_info __user * _info)
121 {
122 struct snd_pcm_info *info;
123 int err;
124
125 info = kmalloc(sizeof(*info), GFP_KERNEL);
126 if (! info)
127 return -ENOMEM;
128 err = snd_pcm_info(substream, info);
129 if (err >= 0) {
130 if (copy_to_user(_info, info, sizeof(*info)))
131 err = -EFAULT;
132 }
133 kfree(info);
134 return err;
135 }
136
137 #undef RULES_DEBUG
138
139 #ifdef RULES_DEBUG
140 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
141 char *snd_pcm_hw_param_names[] = {
142 HW_PARAM(ACCESS),
143 HW_PARAM(FORMAT),
144 HW_PARAM(SUBFORMAT),
145 HW_PARAM(SAMPLE_BITS),
146 HW_PARAM(FRAME_BITS),
147 HW_PARAM(CHANNELS),
148 HW_PARAM(RATE),
149 HW_PARAM(PERIOD_TIME),
150 HW_PARAM(PERIOD_SIZE),
151 HW_PARAM(PERIOD_BYTES),
152 HW_PARAM(PERIODS),
153 HW_PARAM(BUFFER_TIME),
154 HW_PARAM(BUFFER_SIZE),
155 HW_PARAM(BUFFER_BYTES),
156 HW_PARAM(TICK_TIME),
157 };
158 #endif
159
160 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
161 struct snd_pcm_hw_params *params)
162 {
163 unsigned int k;
164 struct snd_pcm_hardware *hw;
165 struct snd_interval *i = NULL;
166 struct snd_mask *m = NULL;
167 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
168 unsigned int rstamps[constrs->rules_num];
169 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
170 unsigned int stamp = 2;
171 int changed, again;
172
173 params->info = 0;
174 params->fifo_size = 0;
175 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
176 params->msbits = 0;
177 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
178 params->rate_num = 0;
179 params->rate_den = 0;
180 }
181
182 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
183 m = hw_param_mask(params, k);
184 if (snd_mask_empty(m))
185 return -EINVAL;
186 if (!(params->rmask & (1 << k)))
187 continue;
188 #ifdef RULES_DEBUG
189 printk("%s = ", snd_pcm_hw_param_names[k]);
190 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
191 #endif
192 changed = snd_mask_refine(m, constrs_mask(constrs, k));
193 #ifdef RULES_DEBUG
194 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 #endif
196 if (changed)
197 params->cmask |= 1 << k;
198 if (changed < 0)
199 return changed;
200 }
201
202 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
203 i = hw_param_interval(params, k);
204 if (snd_interval_empty(i))
205 return -EINVAL;
206 if (!(params->rmask & (1 << k)))
207 continue;
208 #ifdef RULES_DEBUG
209 printk("%s = ", snd_pcm_hw_param_names[k]);
210 if (i->empty)
211 printk("empty");
212 else
213 printk("%c%u %u%c",
214 i->openmin ? '(' : '[', i->min,
215 i->max, i->openmax ? ')' : ']');
216 printk(" -> ");
217 #endif
218 changed = snd_interval_refine(i, constrs_interval(constrs, k));
219 #ifdef RULES_DEBUG
220 if (i->empty)
221 printk("empty\n");
222 else
223 printk("%c%u %u%c\n",
224 i->openmin ? '(' : '[', i->min,
225 i->max, i->openmax ? ')' : ']');
226 #endif
227 if (changed)
228 params->cmask |= 1 << k;
229 if (changed < 0)
230 return changed;
231 }
232
233 for (k = 0; k < constrs->rules_num; k++)
234 rstamps[k] = 0;
235 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
236 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
237 do {
238 again = 0;
239 for (k = 0; k < constrs->rules_num; k++) {
240 struct snd_pcm_hw_rule *r = &constrs->rules[k];
241 unsigned int d;
242 int doit = 0;
243 if (r->cond && !(r->cond & params->flags))
244 continue;
245 for (d = 0; r->deps[d] >= 0; d++) {
246 if (vstamps[r->deps[d]] > rstamps[k]) {
247 doit = 1;
248 break;
249 }
250 }
251 if (!doit)
252 continue;
253 #ifdef RULES_DEBUG
254 printk("Rule %d [%p]: ", k, r->func);
255 if (r->var >= 0) {
256 printk("%s = ", snd_pcm_hw_param_names[r->var]);
257 if (hw_is_mask(r->var)) {
258 m = hw_param_mask(params, r->var);
259 printk("%x", *m->bits);
260 } else {
261 i = hw_param_interval(params, r->var);
262 if (i->empty)
263 printk("empty");
264 else
265 printk("%c%u %u%c",
266 i->openmin ? '(' : '[', i->min,
267 i->max, i->openmax ? ')' : ']');
268 }
269 }
270 #endif
271 changed = r->func(params, r);
272 #ifdef RULES_DEBUG
273 if (r->var >= 0) {
274 printk(" -> ");
275 if (hw_is_mask(r->var))
276 printk("%x", *m->bits);
277 else {
278 if (i->empty)
279 printk("empty");
280 else
281 printk("%c%u %u%c",
282 i->openmin ? '(' : '[', i->min,
283 i->max, i->openmax ? ')' : ']');
284 }
285 }
286 printk("\n");
287 #endif
288 rstamps[k] = stamp;
289 if (changed && r->var >= 0) {
290 params->cmask |= (1 << r->var);
291 vstamps[r->var] = stamp;
292 again = 1;
293 }
294 if (changed < 0)
295 return changed;
296 stamp++;
297 }
298 } while (again);
299 if (!params->msbits) {
300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
301 if (snd_interval_single(i))
302 params->msbits = snd_interval_value(i);
303 }
304
305 if (!params->rate_den) {
306 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
307 if (snd_interval_single(i)) {
308 params->rate_num = snd_interval_value(i);
309 params->rate_den = 1;
310 }
311 }
312
313 hw = &substream->runtime->hw;
314 if (!params->info)
315 params->info = hw->info;
316 if (!params->fifo_size)
317 params->fifo_size = hw->fifo_size;
318 params->rmask = 0;
319 return 0;
320 }
321
322 EXPORT_SYMBOL(snd_pcm_hw_refine);
323
324 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
325 struct snd_pcm_hw_params __user * _params)
326 {
327 struct snd_pcm_hw_params *params;
328 int err;
329
330 params = kmalloc(sizeof(*params), GFP_KERNEL);
331 if (!params) {
332 err = -ENOMEM;
333 goto out;
334 }
335 if (copy_from_user(params, _params, sizeof(*params))) {
336 err = -EFAULT;
337 goto out;
338 }
339 err = snd_pcm_hw_refine(substream, params);
340 if (copy_to_user(_params, params, sizeof(*params))) {
341 if (!err)
342 err = -EFAULT;
343 }
344 out:
345 kfree(params);
346 return err;
347 }
348
349 static int period_to_usecs(struct snd_pcm_runtime *runtime)
350 {
351 int usecs;
352
353 if (! runtime->rate)
354 return -1; /* invalid */
355
356 /* take 75% of period time as the deadline */
357 usecs = (750000 / runtime->rate) * runtime->period_size;
358 usecs += ((750000 % runtime->rate) * runtime->period_size) /
359 runtime->rate;
360
361 return usecs;
362 }
363
364 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
365 struct snd_pcm_hw_params *params)
366 {
367 struct snd_pcm_runtime *runtime;
368 int err, usecs;
369 unsigned int bits;
370 snd_pcm_uframes_t frames;
371
372 if (PCM_RUNTIME_CHECK(substream))
373 return -ENXIO;
374 runtime = substream->runtime;
375 snd_pcm_stream_lock_irq(substream);
376 switch (runtime->status->state) {
377 case SNDRV_PCM_STATE_OPEN:
378 case SNDRV_PCM_STATE_SETUP:
379 case SNDRV_PCM_STATE_PREPARED:
380 break;
381 default:
382 snd_pcm_stream_unlock_irq(substream);
383 return -EBADFD;
384 }
385 snd_pcm_stream_unlock_irq(substream);
386 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
387 if (!substream->oss.oss)
388 #endif
389 if (atomic_read(&substream->mmap_count))
390 return -EBADFD;
391
392 params->rmask = ~0U;
393 err = snd_pcm_hw_refine(substream, params);
394 if (err < 0)
395 goto _error;
396
397 err = snd_pcm_hw_params_choose(substream, params);
398 if (err < 0)
399 goto _error;
400
401 if (substream->ops->hw_params != NULL) {
402 err = substream->ops->hw_params(substream, params);
403 if (err < 0)
404 goto _error;
405 }
406
407 runtime->access = params_access(params);
408 runtime->format = params_format(params);
409 runtime->subformat = params_subformat(params);
410 runtime->channels = params_channels(params);
411 runtime->rate = params_rate(params);
412 runtime->period_size = params_period_size(params);
413 runtime->periods = params_periods(params);
414 runtime->buffer_size = params_buffer_size(params);
415 runtime->info = params->info;
416 runtime->rate_num = params->rate_num;
417 runtime->rate_den = params->rate_den;
418
419 bits = snd_pcm_format_physical_width(runtime->format);
420 runtime->sample_bits = bits;
421 bits *= runtime->channels;
422 runtime->frame_bits = bits;
423 frames = 1;
424 while (bits % 8 != 0) {
425 bits *= 2;
426 frames *= 2;
427 }
428 runtime->byte_align = bits / 8;
429 runtime->min_align = frames;
430
431 /* Default sw params */
432 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
433 runtime->period_step = 1;
434 runtime->control->avail_min = runtime->period_size;
435 runtime->start_threshold = 1;
436 runtime->stop_threshold = runtime->buffer_size;
437 runtime->silence_threshold = 0;
438 runtime->silence_size = 0;
439 runtime->boundary = runtime->buffer_size;
440 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
441 runtime->boundary *= 2;
442
443 snd_pcm_timer_resolution_change(substream);
444 runtime->status->state = SNDRV_PCM_STATE_SETUP;
445
446 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
447 substream->latency_id);
448 if ((usecs = period_to_usecs(runtime)) >= 0)
449 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
450 substream->latency_id, usecs);
451 return 0;
452 _error:
453 /* hardware might be unuseable from this time,
454 so we force application to retry to set
455 the correct hardware parameter settings */
456 runtime->status->state = SNDRV_PCM_STATE_OPEN;
457 if (substream->ops->hw_free != NULL)
458 substream->ops->hw_free(substream);
459 return err;
460 }
461
462 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
463 struct snd_pcm_hw_params __user * _params)
464 {
465 struct snd_pcm_hw_params *params;
466 int err;
467
468 params = kmalloc(sizeof(*params), GFP_KERNEL);
469 if (!params) {
470 err = -ENOMEM;
471 goto out;
472 }
473 if (copy_from_user(params, _params, sizeof(*params))) {
474 err = -EFAULT;
475 goto out;
476 }
477 err = snd_pcm_hw_params(substream, params);
478 if (copy_to_user(_params, params, sizeof(*params))) {
479 if (!err)
480 err = -EFAULT;
481 }
482 out:
483 kfree(params);
484 return err;
485 }
486
487 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
488 {
489 struct snd_pcm_runtime *runtime;
490 int result = 0;
491
492 if (PCM_RUNTIME_CHECK(substream))
493 return -ENXIO;
494 runtime = substream->runtime;
495 snd_pcm_stream_lock_irq(substream);
496 switch (runtime->status->state) {
497 case SNDRV_PCM_STATE_SETUP:
498 case SNDRV_PCM_STATE_PREPARED:
499 break;
500 default:
501 snd_pcm_stream_unlock_irq(substream);
502 return -EBADFD;
503 }
504 snd_pcm_stream_unlock_irq(substream);
505 if (atomic_read(&substream->mmap_count))
506 return -EBADFD;
507 if (substream->ops->hw_free)
508 result = substream->ops->hw_free(substream);
509 runtime->status->state = SNDRV_PCM_STATE_OPEN;
510 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
511 substream->latency_id);
512 return result;
513 }
514
515 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
516 struct snd_pcm_sw_params *params)
517 {
518 struct snd_pcm_runtime *runtime;
519
520 if (PCM_RUNTIME_CHECK(substream))
521 return -ENXIO;
522 runtime = substream->runtime;
523 snd_pcm_stream_lock_irq(substream);
524 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
525 snd_pcm_stream_unlock_irq(substream);
526 return -EBADFD;
527 }
528 snd_pcm_stream_unlock_irq(substream);
529
530 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
531 return -EINVAL;
532 if (params->avail_min == 0)
533 return -EINVAL;
534 if (params->silence_size >= runtime->boundary) {
535 if (params->silence_threshold != 0)
536 return -EINVAL;
537 } else {
538 if (params->silence_size > params->silence_threshold)
539 return -EINVAL;
540 if (params->silence_threshold > runtime->buffer_size)
541 return -EINVAL;
542 }
543 snd_pcm_stream_lock_irq(substream);
544 runtime->tstamp_mode = params->tstamp_mode;
545 runtime->period_step = params->period_step;
546 runtime->control->avail_min = params->avail_min;
547 runtime->start_threshold = params->start_threshold;
548 runtime->stop_threshold = params->stop_threshold;
549 runtime->silence_threshold = params->silence_threshold;
550 runtime->silence_size = params->silence_size;
551 params->boundary = runtime->boundary;
552 if (snd_pcm_running(substream)) {
553 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
554 runtime->silence_size > 0)
555 snd_pcm_playback_silence(substream, ULONG_MAX);
556 wake_up(&runtime->sleep);
557 }
558 snd_pcm_stream_unlock_irq(substream);
559 return 0;
560 }
561
562 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
563 struct snd_pcm_sw_params __user * _params)
564 {
565 struct snd_pcm_sw_params params;
566 int err;
567 if (copy_from_user(&params, _params, sizeof(params)))
568 return -EFAULT;
569 err = snd_pcm_sw_params(substream, &params);
570 if (copy_to_user(_params, &params, sizeof(params)))
571 return -EFAULT;
572 return err;
573 }
574
575 int snd_pcm_status(struct snd_pcm_substream *substream,
576 struct snd_pcm_status *status)
577 {
578 struct snd_pcm_runtime *runtime = substream->runtime;
579
580 snd_pcm_stream_lock_irq(substream);
581 status->state = runtime->status->state;
582 status->suspended_state = runtime->status->suspended_state;
583 if (status->state == SNDRV_PCM_STATE_OPEN)
584 goto _end;
585 status->trigger_tstamp = runtime->trigger_tstamp;
586 if (snd_pcm_running(substream)) {
587 snd_pcm_update_hw_ptr(substream);
588 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
589 status->tstamp = runtime->status->tstamp;
590 goto _tstamp_end;
591 }
592 }
593 snd_pcm_gettime(runtime, &status->tstamp);
594 _tstamp_end:
595 status->appl_ptr = runtime->control->appl_ptr;
596 status->hw_ptr = runtime->status->hw_ptr;
597 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
598 status->avail = snd_pcm_playback_avail(runtime);
599 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
600 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
601 status->delay = runtime->buffer_size - status->avail;
602 else
603 status->delay = 0;
604 } else {
605 status->avail = snd_pcm_capture_avail(runtime);
606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
607 status->delay = status->avail;
608 else
609 status->delay = 0;
610 }
611 status->avail_max = runtime->avail_max;
612 status->overrange = runtime->overrange;
613 runtime->avail_max = 0;
614 runtime->overrange = 0;
615 _end:
616 snd_pcm_stream_unlock_irq(substream);
617 return 0;
618 }
619
620 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
621 struct snd_pcm_status __user * _status)
622 {
623 struct snd_pcm_status status;
624 int res;
625
626 memset(&status, 0, sizeof(status));
627 res = snd_pcm_status(substream, &status);
628 if (res < 0)
629 return res;
630 if (copy_to_user(_status, &status, sizeof(status)))
631 return -EFAULT;
632 return 0;
633 }
634
635 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
636 struct snd_pcm_channel_info * info)
637 {
638 struct snd_pcm_runtime *runtime;
639 unsigned int channel;
640
641 channel = info->channel;
642 runtime = substream->runtime;
643 snd_pcm_stream_lock_irq(substream);
644 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
645 snd_pcm_stream_unlock_irq(substream);
646 return -EBADFD;
647 }
648 snd_pcm_stream_unlock_irq(substream);
649 if (channel >= runtime->channels)
650 return -EINVAL;
651 memset(info, 0, sizeof(*info));
652 info->channel = channel;
653 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
654 }
655
656 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
657 struct snd_pcm_channel_info __user * _info)
658 {
659 struct snd_pcm_channel_info info;
660 int res;
661
662 if (copy_from_user(&info, _info, sizeof(info)))
663 return -EFAULT;
664 res = snd_pcm_channel_info(substream, &info);
665 if (res < 0)
666 return res;
667 if (copy_to_user(_info, &info, sizeof(info)))
668 return -EFAULT;
669 return 0;
670 }
671
672 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
673 {
674 struct snd_pcm_runtime *runtime = substream->runtime;
675 if (runtime->trigger_master == NULL)
676 return;
677 if (runtime->trigger_master == substream) {
678 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
679 } else {
680 snd_pcm_trigger_tstamp(runtime->trigger_master);
681 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
682 }
683 runtime->trigger_master = NULL;
684 }
685
686 struct action_ops {
687 int (*pre_action)(struct snd_pcm_substream *substream, int state);
688 int (*do_action)(struct snd_pcm_substream *substream, int state);
689 void (*undo_action)(struct snd_pcm_substream *substream, int state);
690 void (*post_action)(struct snd_pcm_substream *substream, int state);
691 };
692
693 /*
694 * this functions is core for handling of linked stream
695 * Note: the stream state might be changed also on failure
696 * Note2: call with calling stream lock + link lock
697 */
698 static int snd_pcm_action_group(struct action_ops *ops,
699 struct snd_pcm_substream *substream,
700 int state, int do_lock)
701 {
702 struct snd_pcm_substream *s = NULL;
703 struct snd_pcm_substream *s1;
704 int res = 0;
705
706 snd_pcm_group_for_each_entry(s, substream) {
707 if (do_lock && s != substream)
708 spin_lock_nested(&s->self_group.lock,
709 SINGLE_DEPTH_NESTING);
710 res = ops->pre_action(s, state);
711 if (res < 0)
712 goto _unlock;
713 }
714 snd_pcm_group_for_each_entry(s, substream) {
715 res = ops->do_action(s, state);
716 if (res < 0) {
717 if (ops->undo_action) {
718 snd_pcm_group_for_each_entry(s1, substream) {
719 if (s1 == s) /* failed stream */
720 break;
721 ops->undo_action(s1, state);
722 }
723 }
724 s = NULL; /* unlock all */
725 goto _unlock;
726 }
727 }
728 snd_pcm_group_for_each_entry(s, substream) {
729 ops->post_action(s, state);
730 }
731 _unlock:
732 if (do_lock) {
733 /* unlock streams */
734 snd_pcm_group_for_each_entry(s1, substream) {
735 if (s1 != substream)
736 spin_unlock(&s1->self_group.lock);
737 if (s1 == s) /* end */
738 break;
739 }
740 }
741 return res;
742 }
743
744 /*
745 * Note: call with stream lock
746 */
747 static int snd_pcm_action_single(struct action_ops *ops,
748 struct snd_pcm_substream *substream,
749 int state)
750 {
751 int res;
752
753 res = ops->pre_action(substream, state);
754 if (res < 0)
755 return res;
756 res = ops->do_action(substream, state);
757 if (res == 0)
758 ops->post_action(substream, state);
759 else if (ops->undo_action)
760 ops->undo_action(substream, state);
761 return res;
762 }
763
764 /*
765 * Note: call with stream lock
766 */
767 static int snd_pcm_action(struct action_ops *ops,
768 struct snd_pcm_substream *substream,
769 int state)
770 {
771 int res;
772
773 if (snd_pcm_stream_linked(substream)) {
774 if (!spin_trylock(&substream->group->lock)) {
775 spin_unlock(&substream->self_group.lock);
776 spin_lock(&substream->group->lock);
777 spin_lock(&substream->self_group.lock);
778 }
779 res = snd_pcm_action_group(ops, substream, state, 1);
780 spin_unlock(&substream->group->lock);
781 } else {
782 res = snd_pcm_action_single(ops, substream, state);
783 }
784 return res;
785 }
786
787 /*
788 * Note: don't use any locks before
789 */
790 static int snd_pcm_action_lock_irq(struct action_ops *ops,
791 struct snd_pcm_substream *substream,
792 int state)
793 {
794 int res;
795
796 read_lock_irq(&snd_pcm_link_rwlock);
797 if (snd_pcm_stream_linked(substream)) {
798 spin_lock(&substream->group->lock);
799 spin_lock(&substream->self_group.lock);
800 res = snd_pcm_action_group(ops, substream, state, 1);
801 spin_unlock(&substream->self_group.lock);
802 spin_unlock(&substream->group->lock);
803 } else {
804 spin_lock(&substream->self_group.lock);
805 res = snd_pcm_action_single(ops, substream, state);
806 spin_unlock(&substream->self_group.lock);
807 }
808 read_unlock_irq(&snd_pcm_link_rwlock);
809 return res;
810 }
811
812 /*
813 */
814 static int snd_pcm_action_nonatomic(struct action_ops *ops,
815 struct snd_pcm_substream *substream,
816 int state)
817 {
818 int res;
819
820 down_read(&snd_pcm_link_rwsem);
821 if (snd_pcm_stream_linked(substream))
822 res = snd_pcm_action_group(ops, substream, state, 0);
823 else
824 res = snd_pcm_action_single(ops, substream, state);
825 up_read(&snd_pcm_link_rwsem);
826 return res;
827 }
828
829 /*
830 * start callbacks
831 */
832 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
833 {
834 struct snd_pcm_runtime *runtime = substream->runtime;
835 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
836 return -EBADFD;
837 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
838 !snd_pcm_playback_data(substream))
839 return -EPIPE;
840 runtime->trigger_master = substream;
841 return 0;
842 }
843
844 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
845 {
846 if (substream->runtime->trigger_master != substream)
847 return 0;
848 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
849 }
850
851 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
852 {
853 if (substream->runtime->trigger_master == substream)
854 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
855 }
856
857 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
858 {
859 struct snd_pcm_runtime *runtime = substream->runtime;
860 snd_pcm_trigger_tstamp(substream);
861 runtime->status->state = state;
862 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
863 runtime->silence_size > 0)
864 snd_pcm_playback_silence(substream, ULONG_MAX);
865 if (substream->timer)
866 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
867 &runtime->trigger_tstamp);
868 }
869
870 static struct action_ops snd_pcm_action_start = {
871 .pre_action = snd_pcm_pre_start,
872 .do_action = snd_pcm_do_start,
873 .undo_action = snd_pcm_undo_start,
874 .post_action = snd_pcm_post_start
875 };
876
877 /**
878 * snd_pcm_start - start all linked streams
879 * @substream: the PCM substream instance
880 */
881 int snd_pcm_start(struct snd_pcm_substream *substream)
882 {
883 return snd_pcm_action(&snd_pcm_action_start, substream,
884 SNDRV_PCM_STATE_RUNNING);
885 }
886
887 /*
888 * stop callbacks
889 */
890 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
891 {
892 struct snd_pcm_runtime *runtime = substream->runtime;
893 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
894 return -EBADFD;
895 runtime->trigger_master = substream;
896 return 0;
897 }
898
899 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
900 {
901 if (substream->runtime->trigger_master == substream &&
902 snd_pcm_running(substream))
903 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
904 return 0; /* unconditonally stop all substreams */
905 }
906
907 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
908 {
909 struct snd_pcm_runtime *runtime = substream->runtime;
910 if (runtime->status->state != state) {
911 snd_pcm_trigger_tstamp(substream);
912 if (substream->timer)
913 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
914 &runtime->trigger_tstamp);
915 runtime->status->state = state;
916 }
917 wake_up(&runtime->sleep);
918 }
919
920 static struct action_ops snd_pcm_action_stop = {
921 .pre_action = snd_pcm_pre_stop,
922 .do_action = snd_pcm_do_stop,
923 .post_action = snd_pcm_post_stop
924 };
925
926 /**
927 * snd_pcm_stop - try to stop all running streams in the substream group
928 * @substream: the PCM substream instance
929 * @state: PCM state after stopping the stream
930 *
931 * The state of each stream is then changed to the given state unconditionally.
932 */
933 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
934 {
935 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
936 }
937
938 EXPORT_SYMBOL(snd_pcm_stop);
939
940 /**
941 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
942 * @substream: the PCM substream
943 *
944 * After stopping, the state is changed to SETUP.
945 * Unlike snd_pcm_stop(), this affects only the given stream.
946 */
947 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
948 {
949 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
950 SNDRV_PCM_STATE_SETUP);
951 }
952
953 /*
954 * pause callbacks
955 */
956 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
957 {
958 struct snd_pcm_runtime *runtime = substream->runtime;
959 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
960 return -ENOSYS;
961 if (push) {
962 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
963 return -EBADFD;
964 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
965 return -EBADFD;
966 runtime->trigger_master = substream;
967 return 0;
968 }
969
970 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
971 {
972 if (substream->runtime->trigger_master != substream)
973 return 0;
974 return substream->ops->trigger(substream,
975 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
976 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
977 }
978
979 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
980 {
981 if (substream->runtime->trigger_master == substream)
982 substream->ops->trigger(substream,
983 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
984 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
985 }
986
987 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
988 {
989 struct snd_pcm_runtime *runtime = substream->runtime;
990 snd_pcm_trigger_tstamp(substream);
991 if (push) {
992 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
993 if (substream->timer)
994 snd_timer_notify(substream->timer,
995 SNDRV_TIMER_EVENT_MPAUSE,
996 &runtime->trigger_tstamp);
997 wake_up(&runtime->sleep);
998 } else {
999 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1000 if (substream->timer)
1001 snd_timer_notify(substream->timer,
1002 SNDRV_TIMER_EVENT_MCONTINUE,
1003 &runtime->trigger_tstamp);
1004 }
1005 }
1006
1007 static struct action_ops snd_pcm_action_pause = {
1008 .pre_action = snd_pcm_pre_pause,
1009 .do_action = snd_pcm_do_pause,
1010 .undo_action = snd_pcm_undo_pause,
1011 .post_action = snd_pcm_post_pause
1012 };
1013
1014 /*
1015 * Push/release the pause for all linked streams.
1016 */
1017 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1018 {
1019 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1020 }
1021
1022 #ifdef CONFIG_PM
1023 /* suspend */
1024
1025 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1026 {
1027 struct snd_pcm_runtime *runtime = substream->runtime;
1028 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1029 return -EBUSY;
1030 runtime->trigger_master = substream;
1031 return 0;
1032 }
1033
1034 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1035 {
1036 struct snd_pcm_runtime *runtime = substream->runtime;
1037 if (runtime->trigger_master != substream)
1038 return 0;
1039 if (! snd_pcm_running(substream))
1040 return 0;
1041 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1042 return 0; /* suspend unconditionally */
1043 }
1044
1045 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1046 {
1047 struct snd_pcm_runtime *runtime = substream->runtime;
1048 snd_pcm_trigger_tstamp(substream);
1049 if (substream->timer)
1050 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1051 &runtime->trigger_tstamp);
1052 runtime->status->suspended_state = runtime->status->state;
1053 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1054 wake_up(&runtime->sleep);
1055 }
1056
1057 static struct action_ops snd_pcm_action_suspend = {
1058 .pre_action = snd_pcm_pre_suspend,
1059 .do_action = snd_pcm_do_suspend,
1060 .post_action = snd_pcm_post_suspend
1061 };
1062
1063 /**
1064 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1065 * @substream: the PCM substream
1066 *
1067 * After this call, all streams are changed to SUSPENDED state.
1068 */
1069 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1070 {
1071 int err;
1072 unsigned long flags;
1073
1074 if (! substream)
1075 return 0;
1076
1077 snd_pcm_stream_lock_irqsave(substream, flags);
1078 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1079 snd_pcm_stream_unlock_irqrestore(substream, flags);
1080 return err;
1081 }
1082
1083 EXPORT_SYMBOL(snd_pcm_suspend);
1084
1085 /**
1086 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1087 * @pcm: the PCM instance
1088 *
1089 * After this call, all streams are changed to SUSPENDED state.
1090 */
1091 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1092 {
1093 struct snd_pcm_substream *substream;
1094 int stream, err = 0;
1095
1096 if (! pcm)
1097 return 0;
1098
1099 for (stream = 0; stream < 2; stream++) {
1100 for (substream = pcm->streams[stream].substream;
1101 substream; substream = substream->next) {
1102 /* FIXME: the open/close code should lock this as well */
1103 if (substream->runtime == NULL)
1104 continue;
1105 err = snd_pcm_suspend(substream);
1106 if (err < 0 && err != -EBUSY)
1107 return err;
1108 }
1109 }
1110 return 0;
1111 }
1112
1113 EXPORT_SYMBOL(snd_pcm_suspend_all);
1114
1115 /* resume */
1116
1117 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1118 {
1119 struct snd_pcm_runtime *runtime = substream->runtime;
1120 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1121 return -ENOSYS;
1122 runtime->trigger_master = substream;
1123 return 0;
1124 }
1125
1126 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1127 {
1128 struct snd_pcm_runtime *runtime = substream->runtime;
1129 if (runtime->trigger_master != substream)
1130 return 0;
1131 /* DMA not running previously? */
1132 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1133 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1134 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1135 return 0;
1136 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1137 }
1138
1139 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1140 {
1141 if (substream->runtime->trigger_master == substream &&
1142 snd_pcm_running(substream))
1143 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1144 }
1145
1146 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1147 {
1148 struct snd_pcm_runtime *runtime = substream->runtime;
1149 snd_pcm_trigger_tstamp(substream);
1150 if (substream->timer)
1151 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1152 &runtime->trigger_tstamp);
1153 runtime->status->state = runtime->status->suspended_state;
1154 }
1155
1156 static struct action_ops snd_pcm_action_resume = {
1157 .pre_action = snd_pcm_pre_resume,
1158 .do_action = snd_pcm_do_resume,
1159 .undo_action = snd_pcm_undo_resume,
1160 .post_action = snd_pcm_post_resume
1161 };
1162
1163 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1164 {
1165 struct snd_card *card = substream->pcm->card;
1166 int res;
1167
1168 snd_power_lock(card);
1169 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1170 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1171 snd_power_unlock(card);
1172 return res;
1173 }
1174
1175 #else
1176
1177 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1178 {
1179 return -ENOSYS;
1180 }
1181
1182 #endif /* CONFIG_PM */
1183
1184 /*
1185 * xrun ioctl
1186 *
1187 * Change the RUNNING stream(s) to XRUN state.
1188 */
1189 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1190 {
1191 struct snd_card *card = substream->pcm->card;
1192 struct snd_pcm_runtime *runtime = substream->runtime;
1193 int result;
1194
1195 snd_power_lock(card);
1196 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1197 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1198 if (result < 0)
1199 goto _unlock;
1200 }
1201
1202 snd_pcm_stream_lock_irq(substream);
1203 switch (runtime->status->state) {
1204 case SNDRV_PCM_STATE_XRUN:
1205 result = 0; /* already there */
1206 break;
1207 case SNDRV_PCM_STATE_RUNNING:
1208 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1209 break;
1210 default:
1211 result = -EBADFD;
1212 }
1213 snd_pcm_stream_unlock_irq(substream);
1214 _unlock:
1215 snd_power_unlock(card);
1216 return result;
1217 }
1218
1219 /*
1220 * reset ioctl
1221 */
1222 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1223 {
1224 struct snd_pcm_runtime *runtime = substream->runtime;
1225 switch (runtime->status->state) {
1226 case SNDRV_PCM_STATE_RUNNING:
1227 case SNDRV_PCM_STATE_PREPARED:
1228 case SNDRV_PCM_STATE_PAUSED:
1229 case SNDRV_PCM_STATE_SUSPENDED:
1230 return 0;
1231 default:
1232 return -EBADFD;
1233 }
1234 }
1235
1236 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1237 {
1238 struct snd_pcm_runtime *runtime = substream->runtime;
1239 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1240 if (err < 0)
1241 return err;
1242 runtime->hw_ptr_base = 0;
1243 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1244 runtime->status->hw_ptr % runtime->period_size;
1245 runtime->silence_start = runtime->status->hw_ptr;
1246 runtime->silence_filled = 0;
1247 return 0;
1248 }
1249
1250 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1251 {
1252 struct snd_pcm_runtime *runtime = substream->runtime;
1253 runtime->control->appl_ptr = runtime->status->hw_ptr;
1254 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1255 runtime->silence_size > 0)
1256 snd_pcm_playback_silence(substream, ULONG_MAX);
1257 }
1258
1259 static struct action_ops snd_pcm_action_reset = {
1260 .pre_action = snd_pcm_pre_reset,
1261 .do_action = snd_pcm_do_reset,
1262 .post_action = snd_pcm_post_reset
1263 };
1264
1265 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1266 {
1267 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1268 }
1269
1270 /*
1271 * prepare ioctl
1272 */
1273 /* we use the second argument for updating f_flags */
1274 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1275 int f_flags)
1276 {
1277 struct snd_pcm_runtime *runtime = substream->runtime;
1278 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1279 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1280 return -EBADFD;
1281 if (snd_pcm_running(substream))
1282 return -EBUSY;
1283 substream->f_flags = f_flags;
1284 return 0;
1285 }
1286
1287 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1288 {
1289 int err;
1290 err = substream->ops->prepare(substream);
1291 if (err < 0)
1292 return err;
1293 return snd_pcm_do_reset(substream, 0);
1294 }
1295
1296 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1297 {
1298 struct snd_pcm_runtime *runtime = substream->runtime;
1299 runtime->control->appl_ptr = runtime->status->hw_ptr;
1300 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1301 }
1302
1303 static struct action_ops snd_pcm_action_prepare = {
1304 .pre_action = snd_pcm_pre_prepare,
1305 .do_action = snd_pcm_do_prepare,
1306 .post_action = snd_pcm_post_prepare
1307 };
1308
1309 /**
1310 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1311 * @substream: the PCM substream instance
1312 * @file: file to refer f_flags
1313 */
1314 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1315 struct file *file)
1316 {
1317 int res;
1318 struct snd_card *card = substream->pcm->card;
1319 int f_flags;
1320
1321 if (file)
1322 f_flags = file->f_flags;
1323 else
1324 f_flags = substream->f_flags;
1325
1326 snd_power_lock(card);
1327 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1328 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1329 substream, f_flags);
1330 snd_power_unlock(card);
1331 return res;
1332 }
1333
1334 /*
1335 * drain ioctl
1336 */
1337
1338 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1339 {
1340 if (substream->f_flags & O_NONBLOCK)
1341 return -EAGAIN;
1342 substream->runtime->trigger_master = substream;
1343 return 0;
1344 }
1345
1346 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1347 {
1348 struct snd_pcm_runtime *runtime = substream->runtime;
1349 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1350 switch (runtime->status->state) {
1351 case SNDRV_PCM_STATE_PREPARED:
1352 /* start playback stream if possible */
1353 if (! snd_pcm_playback_empty(substream)) {
1354 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1355 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1356 }
1357 break;
1358 case SNDRV_PCM_STATE_RUNNING:
1359 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1360 break;
1361 default:
1362 break;
1363 }
1364 } else {
1365 /* stop running stream */
1366 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1367 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1368 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1369 snd_pcm_do_stop(substream, new_state);
1370 snd_pcm_post_stop(substream, new_state);
1371 }
1372 }
1373 return 0;
1374 }
1375
1376 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1377 {
1378 }
1379
1380 static struct action_ops snd_pcm_action_drain_init = {
1381 .pre_action = snd_pcm_pre_drain_init,
1382 .do_action = snd_pcm_do_drain_init,
1383 .post_action = snd_pcm_post_drain_init
1384 };
1385
1386 struct drain_rec {
1387 struct snd_pcm_substream *substream;
1388 wait_queue_t wait;
1389 snd_pcm_uframes_t stop_threshold;
1390 };
1391
1392 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1393
1394 /*
1395 * Drain the stream(s).
1396 * When the substream is linked, sync until the draining of all playback streams
1397 * is finished.
1398 * After this call, all streams are supposed to be either SETUP or DRAINING
1399 * (capture only) state.
1400 */
1401 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1402 {
1403 struct snd_card *card;
1404 struct snd_pcm_runtime *runtime;
1405 struct snd_pcm_substream *s;
1406 int result = 0;
1407 int i, num_drecs;
1408 struct drain_rec *drec, drec_tmp, *d;
1409
1410 card = substream->pcm->card;
1411 runtime = substream->runtime;
1412
1413 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1414 return -EBADFD;
1415
1416 snd_power_lock(card);
1417 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1418 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1419 if (result < 0) {
1420 snd_power_unlock(card);
1421 return result;
1422 }
1423 }
1424
1425 /* allocate temporary record for drain sync */
1426 down_read(&snd_pcm_link_rwsem);
1427 if (snd_pcm_stream_linked(substream)) {
1428 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1429 if (! drec) {
1430 up_read(&snd_pcm_link_rwsem);
1431 snd_power_unlock(card);
1432 return -ENOMEM;
1433 }
1434 } else
1435 drec = &drec_tmp;
1436
1437 /* count only playback streams */
1438 num_drecs = 0;
1439 snd_pcm_group_for_each_entry(s, substream) {
1440 runtime = s->runtime;
1441 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1442 d = &drec[num_drecs++];
1443 d->substream = s;
1444 init_waitqueue_entry(&d->wait, current);
1445 add_wait_queue(&runtime->sleep, &d->wait);
1446 /* stop_threshold fixup to avoid endless loop when
1447 * stop_threshold > buffer_size
1448 */
1449 d->stop_threshold = runtime->stop_threshold;
1450 if (runtime->stop_threshold > runtime->buffer_size)
1451 runtime->stop_threshold = runtime->buffer_size;
1452 }
1453 }
1454 up_read(&snd_pcm_link_rwsem);
1455
1456 snd_pcm_stream_lock_irq(substream);
1457 /* resume pause */
1458 if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1459 snd_pcm_pause(substream, 0);
1460
1461 /* pre-start/stop - all running streams are changed to DRAINING state */
1462 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1463 if (result < 0) {
1464 snd_pcm_stream_unlock_irq(substream);
1465 goto _error;
1466 }
1467
1468 for (;;) {
1469 long tout;
1470 if (signal_pending(current)) {
1471 result = -ERESTARTSYS;
1472 break;
1473 }
1474 /* all finished? */
1475 for (i = 0; i < num_drecs; i++) {
1476 runtime = drec[i].substream->runtime;
1477 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1478 break;
1479 }
1480 if (i == num_drecs)
1481 break; /* yes, all drained */
1482
1483 set_current_state(TASK_INTERRUPTIBLE);
1484 snd_pcm_stream_unlock_irq(substream);
1485 snd_power_unlock(card);
1486 tout = schedule_timeout(10 * HZ);
1487 snd_power_lock(card);
1488 snd_pcm_stream_lock_irq(substream);
1489 if (tout == 0) {
1490 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1491 result = -ESTRPIPE;
1492 else {
1493 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1494 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1495 result = -EIO;
1496 }
1497 break;
1498 }
1499 }
1500
1501 snd_pcm_stream_unlock_irq(substream);
1502
1503 _error:
1504 for (i = 0; i < num_drecs; i++) {
1505 d = &drec[i];
1506 runtime = d->substream->runtime;
1507 remove_wait_queue(&runtime->sleep, &d->wait);
1508 runtime->stop_threshold = d->stop_threshold;
1509 }
1510
1511 if (drec != &drec_tmp)
1512 kfree(drec);
1513 snd_power_unlock(card);
1514
1515 return result;
1516 }
1517
1518 /*
1519 * drop ioctl
1520 *
1521 * Immediately put all linked substreams into SETUP state.
1522 */
1523 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1524 {
1525 struct snd_pcm_runtime *runtime;
1526 struct snd_card *card;
1527 int result = 0;
1528
1529 if (PCM_RUNTIME_CHECK(substream))
1530 return -ENXIO;
1531 runtime = substream->runtime;
1532 card = substream->pcm->card;
1533
1534 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1535 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1536 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1537 return -EBADFD;
1538
1539 snd_pcm_stream_lock_irq(substream);
1540 /* resume pause */
1541 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1542 snd_pcm_pause(substream, 0);
1543
1544 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1545 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1546 snd_pcm_stream_unlock_irq(substream);
1547
1548 return result;
1549 }
1550
1551
1552 /* WARNING: Don't forget to fput back the file */
1553 static struct file *snd_pcm_file_fd(int fd)
1554 {
1555 struct file *file;
1556 struct inode *inode;
1557 unsigned int minor;
1558
1559 file = fget(fd);
1560 if (!file)
1561 return NULL;
1562 inode = file->f_path.dentry->d_inode;
1563 if (!S_ISCHR(inode->i_mode) ||
1564 imajor(inode) != snd_major) {
1565 fput(file);
1566 return NULL;
1567 }
1568 minor = iminor(inode);
1569 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1570 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1571 fput(file);
1572 return NULL;
1573 }
1574 return file;
1575 }
1576
1577 /*
1578 * PCM link handling
1579 */
1580 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1581 {
1582 int res = 0;
1583 struct file *file;
1584 struct snd_pcm_file *pcm_file;
1585 struct snd_pcm_substream *substream1;
1586
1587 file = snd_pcm_file_fd(fd);
1588 if (!file)
1589 return -EBADFD;
1590 pcm_file = file->private_data;
1591 substream1 = pcm_file->substream;
1592 down_write(&snd_pcm_link_rwsem);
1593 write_lock_irq(&snd_pcm_link_rwlock);
1594 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1595 substream->runtime->status->state != substream1->runtime->status->state) {
1596 res = -EBADFD;
1597 goto _end;
1598 }
1599 if (snd_pcm_stream_linked(substream1)) {
1600 res = -EALREADY;
1601 goto _end;
1602 }
1603 if (!snd_pcm_stream_linked(substream)) {
1604 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1605 if (substream->group == NULL) {
1606 res = -ENOMEM;
1607 goto _end;
1608 }
1609 spin_lock_init(&substream->group->lock);
1610 INIT_LIST_HEAD(&substream->group->substreams);
1611 list_add_tail(&substream->link_list, &substream->group->substreams);
1612 substream->group->count = 1;
1613 }
1614 list_add_tail(&substream1->link_list, &substream->group->substreams);
1615 substream->group->count++;
1616 substream1->group = substream->group;
1617 _end:
1618 write_unlock_irq(&snd_pcm_link_rwlock);
1619 up_write(&snd_pcm_link_rwsem);
1620 fput(file);
1621 return res;
1622 }
1623
1624 static void relink_to_local(struct snd_pcm_substream *substream)
1625 {
1626 substream->group = &substream->self_group;
1627 INIT_LIST_HEAD(&substream->self_group.substreams);
1628 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1629 }
1630
1631 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1632 {
1633 struct snd_pcm_substream *s;
1634 int res = 0;
1635
1636 down_write(&snd_pcm_link_rwsem);
1637 write_lock_irq(&snd_pcm_link_rwlock);
1638 if (!snd_pcm_stream_linked(substream)) {
1639 res = -EALREADY;
1640 goto _end;
1641 }
1642 list_del(&substream->link_list);
1643 substream->group->count--;
1644 if (substream->group->count == 1) { /* detach the last stream, too */
1645 snd_pcm_group_for_each_entry(s, substream) {
1646 relink_to_local(s);
1647 break;
1648 }
1649 kfree(substream->group);
1650 }
1651 relink_to_local(substream);
1652 _end:
1653 write_unlock_irq(&snd_pcm_link_rwlock);
1654 up_write(&snd_pcm_link_rwsem);
1655 return res;
1656 }
1657
1658 /*
1659 * hw configurator
1660 */
1661 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1662 struct snd_pcm_hw_rule *rule)
1663 {
1664 struct snd_interval t;
1665 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1666 hw_param_interval_c(params, rule->deps[1]), &t);
1667 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1668 }
1669
1670 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1671 struct snd_pcm_hw_rule *rule)
1672 {
1673 struct snd_interval t;
1674 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1675 hw_param_interval_c(params, rule->deps[1]), &t);
1676 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1677 }
1678
1679 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1680 struct snd_pcm_hw_rule *rule)
1681 {
1682 struct snd_interval t;
1683 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1684 hw_param_interval_c(params, rule->deps[1]),
1685 (unsigned long) rule->private, &t);
1686 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1687 }
1688
1689 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1690 struct snd_pcm_hw_rule *rule)
1691 {
1692 struct snd_interval t;
1693 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1694 (unsigned long) rule->private,
1695 hw_param_interval_c(params, rule->deps[1]), &t);
1696 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1697 }
1698
1699 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1700 struct snd_pcm_hw_rule *rule)
1701 {
1702 unsigned int k;
1703 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1704 struct snd_mask m;
1705 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1706 snd_mask_any(&m);
1707 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1708 int bits;
1709 if (! snd_mask_test(mask, k))
1710 continue;
1711 bits = snd_pcm_format_physical_width(k);
1712 if (bits <= 0)
1713 continue; /* ignore invalid formats */
1714 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1715 snd_mask_reset(&m, k);
1716 }
1717 return snd_mask_refine(mask, &m);
1718 }
1719
1720 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1721 struct snd_pcm_hw_rule *rule)
1722 {
1723 struct snd_interval t;
1724 unsigned int k;
1725 t.min = UINT_MAX;
1726 t.max = 0;
1727 t.openmin = 0;
1728 t.openmax = 0;
1729 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1730 int bits;
1731 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1732 continue;
1733 bits = snd_pcm_format_physical_width(k);
1734 if (bits <= 0)
1735 continue; /* ignore invalid formats */
1736 if (t.min > (unsigned)bits)
1737 t.min = bits;
1738 if (t.max < (unsigned)bits)
1739 t.max = bits;
1740 }
1741 t.integer = 1;
1742 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1743 }
1744
1745 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1746 #error "Change this table"
1747 #endif
1748
1749 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1750 48000, 64000, 88200, 96000, 176400, 192000 };
1751
1752 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1753 .count = ARRAY_SIZE(rates),
1754 .list = rates,
1755 };
1756
1757 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1758 struct snd_pcm_hw_rule *rule)
1759 {
1760 struct snd_pcm_hardware *hw = rule->private;
1761 return snd_interval_list(hw_param_interval(params, rule->var),
1762 snd_pcm_known_rates.count,
1763 snd_pcm_known_rates.list, hw->rates);
1764 }
1765
1766 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1767 struct snd_pcm_hw_rule *rule)
1768 {
1769 struct snd_interval t;
1770 struct snd_pcm_substream *substream = rule->private;
1771 t.min = 0;
1772 t.max = substream->buffer_bytes_max;
1773 t.openmin = 0;
1774 t.openmax = 0;
1775 t.integer = 1;
1776 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1777 }
1778
1779 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1780 {
1781 struct snd_pcm_runtime *runtime = substream->runtime;
1782 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1783 int k, err;
1784
1785 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1786 snd_mask_any(constrs_mask(constrs, k));
1787 }
1788
1789 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1790 snd_interval_any(constrs_interval(constrs, k));
1791 }
1792
1793 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1794 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1795 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1796 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1797 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1798
1799 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1800 snd_pcm_hw_rule_format, NULL,
1801 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1802 if (err < 0)
1803 return err;
1804 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1805 snd_pcm_hw_rule_sample_bits, NULL,
1806 SNDRV_PCM_HW_PARAM_FORMAT,
1807 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1808 if (err < 0)
1809 return err;
1810 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1811 snd_pcm_hw_rule_div, NULL,
1812 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1813 if (err < 0)
1814 return err;
1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1816 snd_pcm_hw_rule_mul, NULL,
1817 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1818 if (err < 0)
1819 return err;
1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1821 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1822 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1823 if (err < 0)
1824 return err;
1825 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1826 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1827 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1828 if (err < 0)
1829 return err;
1830 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1831 snd_pcm_hw_rule_div, NULL,
1832 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1833 if (err < 0)
1834 return err;
1835 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1836 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1837 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1838 if (err < 0)
1839 return err;
1840 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1841 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1842 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1843 if (err < 0)
1844 return err;
1845 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1846 snd_pcm_hw_rule_div, NULL,
1847 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1848 if (err < 0)
1849 return err;
1850 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1851 snd_pcm_hw_rule_div, NULL,
1852 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1853 if (err < 0)
1854 return err;
1855 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1856 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1857 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1858 if (err < 0)
1859 return err;
1860 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1861 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1862 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1863 if (err < 0)
1864 return err;
1865 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1866 snd_pcm_hw_rule_mul, NULL,
1867 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1868 if (err < 0)
1869 return err;
1870 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1871 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1872 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1873 if (err < 0)
1874 return err;
1875 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1876 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1877 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1878 if (err < 0)
1879 return err;
1880 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1881 snd_pcm_hw_rule_muldivk, (void*) 8,
1882 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1883 if (err < 0)
1884 return err;
1885 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1886 snd_pcm_hw_rule_muldivk, (void*) 8,
1887 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1888 if (err < 0)
1889 return err;
1890 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1891 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1892 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1893 if (err < 0)
1894 return err;
1895 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1896 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1897 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1898 if (err < 0)
1899 return err;
1900 return 0;
1901 }
1902
1903 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1904 {
1905 struct snd_pcm_runtime *runtime = substream->runtime;
1906 struct snd_pcm_hardware *hw = &runtime->hw;
1907 int err;
1908 unsigned int mask = 0;
1909
1910 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1911 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1912 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1913 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1914 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1915 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1916 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1917 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1918 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1919 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1920 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1921 }
1922 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1923 if (err < 0)
1924 return err;
1925
1926 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1927 if (err < 0)
1928 return err;
1929
1930 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1931 if (err < 0)
1932 return err;
1933
1934 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1935 hw->channels_min, hw->channels_max);
1936 if (err < 0)
1937 return err;
1938
1939 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1940 hw->rate_min, hw->rate_max);
1941 if (err < 0)
1942 return err;
1943
1944 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1945 hw->period_bytes_min, hw->period_bytes_max);
1946 if (err < 0)
1947 return err;
1948
1949 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1950 hw->periods_min, hw->periods_max);
1951 if (err < 0)
1952 return err;
1953
1954 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1955 hw->period_bytes_min, hw->buffer_bytes_max);
1956 if (err < 0)
1957 return err;
1958
1959 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1960 snd_pcm_hw_rule_buffer_bytes_max, substream,
1961 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1962 if (err < 0)
1963 return err;
1964
1965 /* FIXME: remove */
1966 if (runtime->dma_bytes) {
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1968 if (err < 0)
1969 return -EINVAL;
1970 }
1971
1972 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1973 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1974 snd_pcm_hw_rule_rate, hw,
1975 SNDRV_PCM_HW_PARAM_RATE, -1);
1976 if (err < 0)
1977 return err;
1978 }
1979
1980 /* FIXME: this belong to lowlevel */
1981 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1982
1983 return 0;
1984 }
1985
1986 static void pcm_release_private(struct snd_pcm_substream *substream)
1987 {
1988 snd_pcm_unlink(substream);
1989 }
1990
1991 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1992 {
1993 substream->ref_count--;
1994 if (substream->ref_count > 0)
1995 return;
1996
1997 snd_pcm_drop(substream);
1998 if (substream->hw_opened) {
1999 if (substream->ops->hw_free != NULL)
2000 substream->ops->hw_free(substream);
2001 substream->ops->close(substream);
2002 substream->hw_opened = 0;
2003 }
2004 if (substream->pcm_release) {
2005 substream->pcm_release(substream);
2006 substream->pcm_release = NULL;
2007 }
2008 snd_pcm_detach_substream(substream);
2009 }
2010
2011 EXPORT_SYMBOL(snd_pcm_release_substream);
2012
2013 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2014 struct file *file,
2015 struct snd_pcm_substream **rsubstream)
2016 {
2017 struct snd_pcm_substream *substream;
2018 int err;
2019
2020 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2021 if (err < 0)
2022 return err;
2023 if (substream->ref_count > 1) {
2024 *rsubstream = substream;
2025 return 0;
2026 }
2027
2028 err = snd_pcm_hw_constraints_init(substream);
2029 if (err < 0) {
2030 snd_printd("snd_pcm_hw_constraints_init failed\n");
2031 goto error;
2032 }
2033
2034 if ((err = substream->ops->open(substream)) < 0)
2035 goto error;
2036
2037 substream->hw_opened = 1;
2038
2039 err = snd_pcm_hw_constraints_complete(substream);
2040 if (err < 0) {
2041 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2042 goto error;
2043 }
2044
2045 *rsubstream = substream;
2046 return 0;
2047
2048 error:
2049 snd_pcm_release_substream(substream);
2050 return err;
2051 }
2052
2053 EXPORT_SYMBOL(snd_pcm_open_substream);
2054
2055 static int snd_pcm_open_file(struct file *file,
2056 struct snd_pcm *pcm,
2057 int stream,
2058 struct snd_pcm_file **rpcm_file)
2059 {
2060 struct snd_pcm_file *pcm_file;
2061 struct snd_pcm_substream *substream;
2062 struct snd_pcm_str *str;
2063 int err;
2064
2065 if (rpcm_file)
2066 *rpcm_file = NULL;
2067
2068 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2069 if (err < 0)
2070 return err;
2071
2072 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2073 if (pcm_file == NULL) {
2074 snd_pcm_release_substream(substream);
2075 return -ENOMEM;
2076 }
2077 pcm_file->substream = substream;
2078 if (substream->ref_count == 1) {
2079 str = substream->pstr;
2080 substream->file = pcm_file;
2081 substream->pcm_release = pcm_release_private;
2082 }
2083 file->private_data = pcm_file;
2084 if (rpcm_file)
2085 *rpcm_file = pcm_file;
2086 return 0;
2087 }
2088
2089 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2090 {
2091 struct snd_pcm *pcm;
2092
2093 pcm = snd_lookup_minor_data(iminor(inode),
2094 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2095 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2096 }
2097
2098 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2099 {
2100 struct snd_pcm *pcm;
2101
2102 pcm = snd_lookup_minor_data(iminor(inode),
2103 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2104 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2105 }
2106
2107 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2108 {
2109 int err;
2110 struct snd_pcm_file *pcm_file;
2111 wait_queue_t wait;
2112
2113 if (pcm == NULL) {
2114 err = -ENODEV;
2115 goto __error1;
2116 }
2117 err = snd_card_file_add(pcm->card, file);
2118 if (err < 0)
2119 goto __error1;
2120 if (!try_module_get(pcm->card->module)) {
2121 err = -EFAULT;
2122 goto __error2;
2123 }
2124 init_waitqueue_entry(&wait, current);
2125 add_wait_queue(&pcm->open_wait, &wait);
2126 mutex_lock(&pcm->open_mutex);
2127 while (1) {
2128 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2129 if (err >= 0)
2130 break;
2131 if (err == -EAGAIN) {
2132 if (file->f_flags & O_NONBLOCK) {
2133 err = -EBUSY;
2134 break;
2135 }
2136 } else
2137 break;
2138 set_current_state(TASK_INTERRUPTIBLE);
2139 mutex_unlock(&pcm->open_mutex);
2140 schedule();
2141 mutex_lock(&pcm->open_mutex);
2142 if (signal_pending(current)) {
2143 err = -ERESTARTSYS;
2144 break;
2145 }
2146 }
2147 remove_wait_queue(&pcm->open_wait, &wait);
2148 mutex_unlock(&pcm->open_mutex);
2149 if (err < 0)
2150 goto __error;
2151 return err;
2152
2153 __error:
2154 module_put(pcm->card->module);
2155 __error2:
2156 snd_card_file_remove(pcm->card, file);
2157 __error1:
2158 return err;
2159 }
2160
2161 static int snd_pcm_release(struct inode *inode, struct file *file)
2162 {
2163 struct snd_pcm *pcm;
2164 struct snd_pcm_substream *substream;
2165 struct snd_pcm_file *pcm_file;
2166
2167 pcm_file = file->private_data;
2168 substream = pcm_file->substream;
2169 if (snd_BUG_ON(!substream))
2170 return -ENXIO;
2171 pcm = substream->pcm;
2172 mutex_lock(&pcm->open_mutex);
2173 snd_pcm_release_substream(substream);
2174 kfree(pcm_file);
2175 mutex_unlock(&pcm->open_mutex);
2176 wake_up(&pcm->open_wait);
2177 module_put(pcm->card->module);
2178 snd_card_file_remove(pcm->card, file);
2179 return 0;
2180 }
2181
2182 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2183 snd_pcm_uframes_t frames)
2184 {
2185 struct snd_pcm_runtime *runtime = substream->runtime;
2186 snd_pcm_sframes_t appl_ptr;
2187 snd_pcm_sframes_t ret;
2188 snd_pcm_sframes_t hw_avail;
2189
2190 if (frames == 0)
2191 return 0;
2192
2193 snd_pcm_stream_lock_irq(substream);
2194 switch (runtime->status->state) {
2195 case SNDRV_PCM_STATE_PREPARED:
2196 break;
2197 case SNDRV_PCM_STATE_DRAINING:
2198 case SNDRV_PCM_STATE_RUNNING:
2199 if (snd_pcm_update_hw_ptr(substream) >= 0)
2200 break;
2201 /* Fall through */
2202 case SNDRV_PCM_STATE_XRUN:
2203 ret = -EPIPE;
2204 goto __end;
2205 default:
2206 ret = -EBADFD;
2207 goto __end;
2208 }
2209
2210 hw_avail = snd_pcm_playback_hw_avail(runtime);
2211 if (hw_avail <= 0) {
2212 ret = 0;
2213 goto __end;
2214 }
2215 if (frames > (snd_pcm_uframes_t)hw_avail)
2216 frames = hw_avail;
2217 appl_ptr = runtime->control->appl_ptr - frames;
2218 if (appl_ptr < 0)
2219 appl_ptr += runtime->boundary;
2220 runtime->control->appl_ptr = appl_ptr;
2221 ret = frames;
2222 __end:
2223 snd_pcm_stream_unlock_irq(substream);
2224 return ret;
2225 }
2226
2227 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2228 snd_pcm_uframes_t frames)
2229 {
2230 struct snd_pcm_runtime *runtime = substream->runtime;
2231 snd_pcm_sframes_t appl_ptr;
2232 snd_pcm_sframes_t ret;
2233 snd_pcm_sframes_t hw_avail;
2234
2235 if (frames == 0)
2236 return 0;
2237
2238 snd_pcm_stream_lock_irq(substream);
2239 switch (runtime->status->state) {
2240 case SNDRV_PCM_STATE_PREPARED:
2241 case SNDRV_PCM_STATE_DRAINING:
2242 break;
2243 case SNDRV_PCM_STATE_RUNNING:
2244 if (snd_pcm_update_hw_ptr(substream) >= 0)
2245 break;
2246 /* Fall through */
2247 case SNDRV_PCM_STATE_XRUN:
2248 ret = -EPIPE;
2249 goto __end;
2250 default:
2251 ret = -EBADFD;
2252 goto __end;
2253 }
2254
2255 hw_avail = snd_pcm_capture_hw_avail(runtime);
2256 if (hw_avail <= 0) {
2257 ret = 0;
2258 goto __end;
2259 }
2260 if (frames > (snd_pcm_uframes_t)hw_avail)
2261 frames = hw_avail;
2262 appl_ptr = runtime->control->appl_ptr - frames;
2263 if (appl_ptr < 0)
2264 appl_ptr += runtime->boundary;
2265 runtime->control->appl_ptr = appl_ptr;
2266 ret = frames;
2267 __end:
2268 snd_pcm_stream_unlock_irq(substream);
2269 return ret;
2270 }
2271
2272 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2273 snd_pcm_uframes_t frames)
2274 {
2275 struct snd_pcm_runtime *runtime = substream->runtime;
2276 snd_pcm_sframes_t appl_ptr;
2277 snd_pcm_sframes_t ret;
2278 snd_pcm_sframes_t avail;
2279
2280 if (frames == 0)
2281 return 0;
2282
2283 snd_pcm_stream_lock_irq(substream);
2284 switch (runtime->status->state) {
2285 case SNDRV_PCM_STATE_PREPARED:
2286 case SNDRV_PCM_STATE_PAUSED:
2287 break;
2288 case SNDRV_PCM_STATE_DRAINING:
2289 case SNDRV_PCM_STATE_RUNNING:
2290 if (snd_pcm_update_hw_ptr(substream) >= 0)
2291 break;
2292 /* Fall through */
2293 case SNDRV_PCM_STATE_XRUN:
2294 ret = -EPIPE;
2295 goto __end;
2296 default:
2297 ret = -EBADFD;
2298 goto __end;
2299 }
2300
2301 avail = snd_pcm_playback_avail(runtime);
2302 if (avail <= 0) {
2303 ret = 0;
2304 goto __end;
2305 }
2306 if (frames > (snd_pcm_uframes_t)avail)
2307 frames = avail;
2308 appl_ptr = runtime->control->appl_ptr + frames;
2309 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2310 appl_ptr -= runtime->boundary;
2311 runtime->control->appl_ptr = appl_ptr;
2312 ret = frames;
2313 __end:
2314 snd_pcm_stream_unlock_irq(substream);
2315 return ret;
2316 }
2317
2318 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2319 snd_pcm_uframes_t frames)
2320 {
2321 struct snd_pcm_runtime *runtime = substream->runtime;
2322 snd_pcm_sframes_t appl_ptr;
2323 snd_pcm_sframes_t ret;
2324 snd_pcm_sframes_t avail;
2325
2326 if (frames == 0)
2327 return 0;
2328
2329 snd_pcm_stream_lock_irq(substream);
2330 switch (runtime->status->state) {
2331 case SNDRV_PCM_STATE_PREPARED:
2332 case SNDRV_PCM_STATE_DRAINING:
2333 case SNDRV_PCM_STATE_PAUSED:
2334 break;
2335 case SNDRV_PCM_STATE_RUNNING:
2336 if (snd_pcm_update_hw_ptr(substream) >= 0)
2337 break;
2338 /* Fall through */
2339 case SNDRV_PCM_STATE_XRUN:
2340 ret = -EPIPE;
2341 goto __end;
2342 default:
2343 ret = -EBADFD;
2344 goto __end;
2345 }
2346
2347 avail = snd_pcm_capture_avail(runtime);
2348 if (avail <= 0) {
2349 ret = 0;
2350 goto __end;
2351 }
2352 if (frames > (snd_pcm_uframes_t)avail)
2353 frames = avail;
2354 appl_ptr = runtime->control->appl_ptr + frames;
2355 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2356 appl_ptr -= runtime->boundary;
2357 runtime->control->appl_ptr = appl_ptr;
2358 ret = frames;
2359 __end:
2360 snd_pcm_stream_unlock_irq(substream);
2361 return ret;
2362 }
2363
2364 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2365 {
2366 struct snd_pcm_runtime *runtime = substream->runtime;
2367 int err;
2368
2369 snd_pcm_stream_lock_irq(substream);
2370 switch (runtime->status->state) {
2371 case SNDRV_PCM_STATE_DRAINING:
2372 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2373 goto __badfd;
2374 case SNDRV_PCM_STATE_RUNNING:
2375 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2376 break;
2377 /* Fall through */
2378 case SNDRV_PCM_STATE_PREPARED:
2379 case SNDRV_PCM_STATE_SUSPENDED:
2380 err = 0;
2381 break;
2382 case SNDRV_PCM_STATE_XRUN:
2383 err = -EPIPE;
2384 break;
2385 default:
2386 __badfd:
2387 err = -EBADFD;
2388 break;
2389 }
2390 snd_pcm_stream_unlock_irq(substream);
2391 return err;
2392 }
2393
2394 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2395 snd_pcm_sframes_t __user *res)
2396 {
2397 struct snd_pcm_runtime *runtime = substream->runtime;
2398 int err;
2399 snd_pcm_sframes_t n = 0;
2400
2401 snd_pcm_stream_lock_irq(substream);
2402 switch (runtime->status->state) {
2403 case SNDRV_PCM_STATE_DRAINING:
2404 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2405 goto __badfd;
2406 case SNDRV_PCM_STATE_RUNNING:
2407 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2408 break;
2409 /* Fall through */
2410 case SNDRV_PCM_STATE_PREPARED:
2411 case SNDRV_PCM_STATE_SUSPENDED:
2412 err = 0;
2413 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2414 n = snd_pcm_playback_hw_avail(runtime);
2415 else
2416 n = snd_pcm_capture_avail(runtime);
2417 break;
2418 case SNDRV_PCM_STATE_XRUN:
2419 err = -EPIPE;
2420 break;
2421 default:
2422 __badfd:
2423 err = -EBADFD;
2424 break;
2425 }
2426 snd_pcm_stream_unlock_irq(substream);
2427 if (!err)
2428 if (put_user(n, res))
2429 err = -EFAULT;
2430 return err;
2431 }
2432
2433 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2434 struct snd_pcm_sync_ptr __user *_sync_ptr)
2435 {
2436 struct snd_pcm_runtime *runtime = substream->runtime;
2437 struct snd_pcm_sync_ptr sync_ptr;
2438 volatile struct snd_pcm_mmap_status *status;
2439 volatile struct snd_pcm_mmap_control *control;
2440 int err;
2441
2442 memset(&sync_ptr, 0, sizeof(sync_ptr));
2443 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2444 return -EFAULT;
2445 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2446 return -EFAULT;
2447 status = runtime->status;
2448 control = runtime->control;
2449 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2450 err = snd_pcm_hwsync(substream);
2451 if (err < 0)
2452 return err;
2453 }
2454 snd_pcm_stream_lock_irq(substream);
2455 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2456 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2457 else
2458 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2459 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2460 control->avail_min = sync_ptr.c.control.avail_min;
2461 else
2462 sync_ptr.c.control.avail_min = control->avail_min;
2463 sync_ptr.s.status.state = status->state;
2464 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2465 sync_ptr.s.status.tstamp = status->tstamp;
2466 sync_ptr.s.status.suspended_state = status->suspended_state;
2467 snd_pcm_stream_unlock_irq(substream);
2468 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2469 return -EFAULT;
2470 return 0;
2471 }
2472
2473 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2474 {
2475 struct snd_pcm_runtime *runtime = substream->runtime;
2476 int arg;
2477
2478 if (get_user(arg, _arg))
2479 return -EFAULT;
2480 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2481 return -EINVAL;
2482 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2483 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2484 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2485 return 0;
2486 }
2487
2488 static int snd_pcm_common_ioctl1(struct file *file,
2489 struct snd_pcm_substream *substream,
2490 unsigned int cmd, void __user *arg)
2491 {
2492 switch (cmd) {
2493 case SNDRV_PCM_IOCTL_PVERSION:
2494 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2495 case SNDRV_PCM_IOCTL_INFO:
2496 return snd_pcm_info_user(substream, arg);
2497 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2498 return 0;
2499 case SNDRV_PCM_IOCTL_TTSTAMP:
2500 return snd_pcm_tstamp(substream, arg);
2501 case SNDRV_PCM_IOCTL_HW_REFINE:
2502 return snd_pcm_hw_refine_user(substream, arg);
2503 case SNDRV_PCM_IOCTL_HW_PARAMS:
2504 return snd_pcm_hw_params_user(substream, arg);
2505 case SNDRV_PCM_IOCTL_HW_FREE:
2506 return snd_pcm_hw_free(substream);
2507 case SNDRV_PCM_IOCTL_SW_PARAMS:
2508 return snd_pcm_sw_params_user(substream, arg);
2509 case SNDRV_PCM_IOCTL_STATUS:
2510 return snd_pcm_status_user(substream, arg);
2511 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2512 return snd_pcm_channel_info_user(substream, arg);
2513 case SNDRV_PCM_IOCTL_PREPARE:
2514 return snd_pcm_prepare(substream, file);
2515 case SNDRV_PCM_IOCTL_RESET:
2516 return snd_pcm_reset(substream);
2517 case SNDRV_PCM_IOCTL_START:
2518 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2519 case SNDRV_PCM_IOCTL_LINK:
2520 return snd_pcm_link(substream, (int)(unsigned long) arg);
2521 case SNDRV_PCM_IOCTL_UNLINK:
2522 return snd_pcm_unlink(substream);
2523 case SNDRV_PCM_IOCTL_RESUME:
2524 return snd_pcm_resume(substream);
2525 case SNDRV_PCM_IOCTL_XRUN:
2526 return snd_pcm_xrun(substream);
2527 case SNDRV_PCM_IOCTL_HWSYNC:
2528 return snd_pcm_hwsync(substream);
2529 case SNDRV_PCM_IOCTL_DELAY:
2530 return snd_pcm_delay(substream, arg);
2531 case SNDRV_PCM_IOCTL_SYNC_PTR:
2532 return snd_pcm_sync_ptr(substream, arg);
2533 #ifdef CONFIG_SND_SUPPORT_OLD_API
2534 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2535 return snd_pcm_hw_refine_old_user(substream, arg);
2536 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2537 return snd_pcm_hw_params_old_user(substream, arg);
2538 #endif
2539 case SNDRV_PCM_IOCTL_DRAIN:
2540 return snd_pcm_drain(substream);
2541 case SNDRV_PCM_IOCTL_DROP:
2542 return snd_pcm_drop(substream);
2543 case SNDRV_PCM_IOCTL_PAUSE:
2544 {
2545 int res;
2546 snd_pcm_stream_lock_irq(substream);
2547 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2548 snd_pcm_stream_unlock_irq(substream);
2549 return res;
2550 }
2551 }
2552 snd_printd("unknown ioctl = 0x%x\n", cmd);
2553 return -ENOTTY;
2554 }
2555
2556 static int snd_pcm_playback_ioctl1(struct file *file,
2557 struct snd_pcm_substream *substream,
2558 unsigned int cmd, void __user *arg)
2559 {
2560 if (snd_BUG_ON(!substream))
2561 return -ENXIO;
2562 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2563 return -EINVAL;
2564 switch (cmd) {
2565 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2566 {
2567 struct snd_xferi xferi;
2568 struct snd_xferi __user *_xferi = arg;
2569 struct snd_pcm_runtime *runtime = substream->runtime;
2570 snd_pcm_sframes_t result;
2571 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2572 return -EBADFD;
2573 if (put_user(0, &_xferi->result))
2574 return -EFAULT;
2575 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2576 return -EFAULT;
2577 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2578 __put_user(result, &_xferi->result);
2579 return result < 0 ? result : 0;
2580 }
2581 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2582 {
2583 struct snd_xfern xfern;
2584 struct snd_xfern __user *_xfern = arg;
2585 struct snd_pcm_runtime *runtime = substream->runtime;
2586 void __user **bufs;
2587 snd_pcm_sframes_t result;
2588 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2589 return -EBADFD;
2590 if (runtime->channels > 128)
2591 return -EINVAL;
2592 if (put_user(0, &_xfern->result))
2593 return -EFAULT;
2594 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2595 return -EFAULT;
2596 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2597 if (bufs == NULL)
2598 return -ENOMEM;
2599 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2600 kfree(bufs);
2601 return -EFAULT;
2602 }
2603 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2604 kfree(bufs);
2605 __put_user(result, &_xfern->result);
2606 return result < 0 ? result : 0;
2607 }
2608 case SNDRV_PCM_IOCTL_REWIND:
2609 {
2610 snd_pcm_uframes_t frames;
2611 snd_pcm_uframes_t __user *_frames = arg;
2612 snd_pcm_sframes_t result;
2613 if (get_user(frames, _frames))
2614 return -EFAULT;
2615 if (put_user(0, _frames))
2616 return -EFAULT;
2617 result = snd_pcm_playback_rewind(substream, frames);
2618 __put_user(result, _frames);
2619 return result < 0 ? result : 0;
2620 }
2621 case SNDRV_PCM_IOCTL_FORWARD:
2622 {
2623 snd_pcm_uframes_t frames;
2624 snd_pcm_uframes_t __user *_frames = arg;
2625 snd_pcm_sframes_t result;
2626 if (get_user(frames, _frames))
2627 return -EFAULT;
2628 if (put_user(0, _frames))
2629 return -EFAULT;
2630 result = snd_pcm_playback_forward(substream, frames);
2631 __put_user(result, _frames);
2632 return result < 0 ? result : 0;
2633 }
2634 }
2635 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2636 }
2637
2638 static int snd_pcm_capture_ioctl1(struct file *file,
2639 struct snd_pcm_substream *substream,
2640 unsigned int cmd, void __user *arg)
2641 {
2642 if (snd_BUG_ON(!substream))
2643 return -ENXIO;
2644 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2645 return -EINVAL;
2646 switch (cmd) {
2647 case SNDRV_PCM_IOCTL_READI_FRAMES:
2648 {
2649 struct snd_xferi xferi;
2650 struct snd_xferi __user *_xferi = arg;
2651 struct snd_pcm_runtime *runtime = substream->runtime;
2652 snd_pcm_sframes_t result;
2653 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2654 return -EBADFD;
2655 if (put_user(0, &_xferi->result))
2656 return -EFAULT;
2657 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2658 return -EFAULT;
2659 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2660 __put_user(result, &_xferi->result);
2661 return result < 0 ? result : 0;
2662 }
2663 case SNDRV_PCM_IOCTL_READN_FRAMES:
2664 {
2665 struct snd_xfern xfern;
2666 struct snd_xfern __user *_xfern = arg;
2667 struct snd_pcm_runtime *runtime = substream->runtime;
2668 void *bufs;
2669 snd_pcm_sframes_t result;
2670 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2671 return -EBADFD;
2672 if (runtime->channels > 128)
2673 return -EINVAL;
2674 if (put_user(0, &_xfern->result))
2675 return -EFAULT;
2676 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2677 return -EFAULT;
2678 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2679 if (bufs == NULL)
2680 return -ENOMEM;
2681 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2682 kfree(bufs);
2683 return -EFAULT;
2684 }
2685 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2686 kfree(bufs);
2687 __put_user(result, &_xfern->result);
2688 return result < 0 ? result : 0;
2689 }
2690 case SNDRV_PCM_IOCTL_REWIND:
2691 {
2692 snd_pcm_uframes_t frames;
2693 snd_pcm_uframes_t __user *_frames = arg;
2694 snd_pcm_sframes_t result;
2695 if (get_user(frames, _frames))
2696 return -EFAULT;
2697 if (put_user(0, _frames))
2698 return -EFAULT;
2699 result = snd_pcm_capture_rewind(substream, frames);
2700 __put_user(result, _frames);
2701 return result < 0 ? result : 0;
2702 }
2703 case SNDRV_PCM_IOCTL_FORWARD:
2704 {
2705 snd_pcm_uframes_t frames;
2706 snd_pcm_uframes_t __user *_frames = arg;
2707 snd_pcm_sframes_t result;
2708 if (get_user(frames, _frames))
2709 return -EFAULT;
2710 if (put_user(0, _frames))
2711 return -EFAULT;
2712 result = snd_pcm_capture_forward(substream, frames);
2713 __put_user(result, _frames);
2714 return result < 0 ? result : 0;
2715 }
2716 }
2717 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2718 }
2719
2720 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2721 unsigned long arg)
2722 {
2723 struct snd_pcm_file *pcm_file;
2724
2725 pcm_file = file->private_data;
2726
2727 if (((cmd >> 8) & 0xff) != 'A')
2728 return -ENOTTY;
2729
2730 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2731 (void __user *)arg);
2732 }
2733
2734 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2735 unsigned long arg)
2736 {
2737 struct snd_pcm_file *pcm_file;
2738
2739 pcm_file = file->private_data;
2740
2741 if (((cmd >> 8) & 0xff) != 'A')
2742 return -ENOTTY;
2743
2744 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2745 (void __user *)arg);
2746 }
2747
2748 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2749 unsigned int cmd, void *arg)
2750 {
2751 mm_segment_t fs;
2752 int result;
2753
2754 fs = snd_enter_user();
2755 switch (substream->stream) {
2756 case SNDRV_PCM_STREAM_PLAYBACK:
2757 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2758 (void __user *)arg);
2759 break;
2760 case SNDRV_PCM_STREAM_CAPTURE:
2761 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2762 (void __user *)arg);
2763 break;
2764 default:
2765 result = -EINVAL;
2766 break;
2767 }
2768 snd_leave_user(fs);
2769 return result;
2770 }
2771
2772 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2773
2774 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2775 loff_t * offset)
2776 {
2777 struct snd_pcm_file *pcm_file;
2778 struct snd_pcm_substream *substream;
2779 struct snd_pcm_runtime *runtime;
2780 snd_pcm_sframes_t result;
2781
2782 pcm_file = file->private_data;
2783 substream = pcm_file->substream;
2784 if (PCM_RUNTIME_CHECK(substream))
2785 return -ENXIO;
2786 runtime = substream->runtime;
2787 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2788 return -EBADFD;
2789 if (!frame_aligned(runtime, count))
2790 return -EINVAL;
2791 count = bytes_to_frames(runtime, count);
2792 result = snd_pcm_lib_read(substream, buf, count);
2793 if (result > 0)
2794 result = frames_to_bytes(runtime, result);
2795 return result;
2796 }
2797
2798 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2799 size_t count, loff_t * offset)
2800 {
2801 struct snd_pcm_file *pcm_file;
2802 struct snd_pcm_substream *substream;
2803 struct snd_pcm_runtime *runtime;
2804 snd_pcm_sframes_t result;
2805
2806 pcm_file = file->private_data;
2807 substream = pcm_file->substream;
2808 if (PCM_RUNTIME_CHECK(substream))
2809 return -ENXIO;
2810 runtime = substream->runtime;
2811 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2812 return -EBADFD;
2813 if (!frame_aligned(runtime, count))
2814 return -EINVAL;
2815 count = bytes_to_frames(runtime, count);
2816 result = snd_pcm_lib_write(substream, buf, count);
2817 if (result > 0)
2818 result = frames_to_bytes(runtime, result);
2819 return result;
2820 }
2821
2822 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2823 unsigned long nr_segs, loff_t pos)
2824
2825 {
2826 struct snd_pcm_file *pcm_file;
2827 struct snd_pcm_substream *substream;
2828 struct snd_pcm_runtime *runtime;
2829 snd_pcm_sframes_t result;
2830 unsigned long i;
2831 void __user **bufs;
2832 snd_pcm_uframes_t frames;
2833
2834 pcm_file = iocb->ki_filp->private_data;
2835 substream = pcm_file->substream;
2836 if (PCM_RUNTIME_CHECK(substream))
2837 return -ENXIO;
2838 runtime = substream->runtime;
2839 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2840 return -EBADFD;
2841 if (nr_segs > 1024 || nr_segs != runtime->channels)
2842 return -EINVAL;
2843 if (!frame_aligned(runtime, iov->iov_len))
2844 return -EINVAL;
2845 frames = bytes_to_samples(runtime, iov->iov_len);
2846 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2847 if (bufs == NULL)
2848 return -ENOMEM;
2849 for (i = 0; i < nr_segs; ++i)
2850 bufs[i] = iov[i].iov_base;
2851 result = snd_pcm_lib_readv(substream, bufs, frames);
2852 if (result > 0)
2853 result = frames_to_bytes(runtime, result);
2854 kfree(bufs);
2855 return result;
2856 }
2857
2858 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2859 unsigned long nr_segs, loff_t pos)
2860 {
2861 struct snd_pcm_file *pcm_file;
2862 struct snd_pcm_substream *substream;
2863 struct snd_pcm_runtime *runtime;
2864 snd_pcm_sframes_t result;
2865 unsigned long i;
2866 void __user **bufs;
2867 snd_pcm_uframes_t frames;
2868
2869 pcm_file = iocb->ki_filp->private_data;
2870 substream = pcm_file->substream;
2871 if (PCM_RUNTIME_CHECK(substream))
2872 return -ENXIO;
2873 runtime = substream->runtime;
2874 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2875 return -EBADFD;
2876 if (nr_segs > 128 || nr_segs != runtime->channels ||
2877 !frame_aligned(runtime, iov->iov_len))
2878 return -EINVAL;
2879 frames = bytes_to_samples(runtime, iov->iov_len);
2880 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2881 if (bufs == NULL)
2882 return -ENOMEM;
2883 for (i = 0; i < nr_segs; ++i)
2884 bufs[i] = iov[i].iov_base;
2885 result = snd_pcm_lib_writev(substream, bufs, frames);
2886 if (result > 0)
2887 result = frames_to_bytes(runtime, result);
2888 kfree(bufs);
2889 return result;
2890 }
2891
2892 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2893 {
2894 struct snd_pcm_file *pcm_file;
2895 struct snd_pcm_substream *substream;
2896 struct snd_pcm_runtime *runtime;
2897 unsigned int mask;
2898 snd_pcm_uframes_t avail;
2899
2900 pcm_file = file->private_data;
2901
2902 substream = pcm_file->substream;
2903 if (PCM_RUNTIME_CHECK(substream))
2904 return -ENXIO;
2905 runtime = substream->runtime;
2906
2907 poll_wait(file, &runtime->sleep, wait);
2908
2909 snd_pcm_stream_lock_irq(substream);
2910 avail = snd_pcm_playback_avail(runtime);
2911 switch (runtime->status->state) {
2912 case SNDRV_PCM_STATE_RUNNING:
2913 case SNDRV_PCM_STATE_PREPARED:
2914 case SNDRV_PCM_STATE_PAUSED:
2915 if (avail >= runtime->control->avail_min) {
2916 mask = POLLOUT | POLLWRNORM;
2917 break;
2918 }
2919 /* Fall through */
2920 case SNDRV_PCM_STATE_DRAINING:
2921 mask = 0;
2922 break;
2923 default:
2924 mask = POLLOUT | POLLWRNORM | POLLERR;
2925 break;
2926 }
2927 snd_pcm_stream_unlock_irq(substream);
2928 return mask;
2929 }
2930
2931 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2932 {
2933 struct snd_pcm_file *pcm_file;
2934 struct snd_pcm_substream *substream;
2935 struct snd_pcm_runtime *runtime;
2936 unsigned int mask;
2937 snd_pcm_uframes_t avail;
2938
2939 pcm_file = file->private_data;
2940
2941 substream = pcm_file->substream;
2942 if (PCM_RUNTIME_CHECK(substream))
2943 return -ENXIO;
2944 runtime = substream->runtime;
2945
2946 poll_wait(file, &runtime->sleep, wait);
2947
2948 snd_pcm_stream_lock_irq(substream);
2949 avail = snd_pcm_capture_avail(runtime);
2950 switch (runtime->status->state) {
2951 case SNDRV_PCM_STATE_RUNNING:
2952 case SNDRV_PCM_STATE_PREPARED:
2953 case SNDRV_PCM_STATE_PAUSED:
2954 if (avail >= runtime->control->avail_min) {
2955 mask = POLLIN | POLLRDNORM;
2956 break;
2957 }
2958 mask = 0;
2959 break;
2960 case SNDRV_PCM_STATE_DRAINING:
2961 if (avail > 0) {
2962 mask = POLLIN | POLLRDNORM;
2963 break;
2964 }
2965 /* Fall through */
2966 default:
2967 mask = POLLIN | POLLRDNORM | POLLERR;
2968 break;
2969 }
2970 snd_pcm_stream_unlock_irq(substream);
2971 return mask;
2972 }
2973
2974 /*
2975 * mmap support
2976 */
2977
2978 /*
2979 * Only on coherent architectures, we can mmap the status and the control records
2980 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2981 */
2982 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2983 /*
2984 * mmap status record
2985 */
2986 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2987 struct vm_fault *vmf)
2988 {
2989 struct snd_pcm_substream *substream = area->vm_private_data;
2990 struct snd_pcm_runtime *runtime;
2991
2992 if (substream == NULL)
2993 return VM_FAULT_SIGBUS;
2994 runtime = substream->runtime;
2995 vmf->page = virt_to_page(runtime->status);
2996 get_page(vmf->page);
2997 return 0;
2998 }
2999
3000 static struct vm_operations_struct snd_pcm_vm_ops_status =
3001 {
3002 .fault = snd_pcm_mmap_status_fault,
3003 };
3004
3005 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3006 struct vm_area_struct *area)
3007 {
3008 struct snd_pcm_runtime *runtime;
3009 long size;
3010 if (!(area->vm_flags & VM_READ))
3011 return -EINVAL;
3012 runtime = substream->runtime;
3013 size = area->vm_end - area->vm_start;
3014 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3015 return -EINVAL;
3016 area->vm_ops = &snd_pcm_vm_ops_status;
3017 area->vm_private_data = substream;
3018 area->vm_flags |= VM_RESERVED;
3019 return 0;
3020 }
3021
3022 /*
3023 * mmap control record
3024 */
3025 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3026 struct vm_fault *vmf)
3027 {
3028 struct snd_pcm_substream *substream = area->vm_private_data;
3029 struct snd_pcm_runtime *runtime;
3030
3031 if (substream == NULL)
3032 return VM_FAULT_SIGBUS;
3033 runtime = substream->runtime;
3034 vmf->page = virt_to_page(runtime->control);
3035 get_page(vmf->page);
3036 return 0;
3037 }
3038
3039 static struct vm_operations_struct snd_pcm_vm_ops_control =
3040 {
3041 .fault = snd_pcm_mmap_control_fault,
3042 };
3043
3044 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3045 struct vm_area_struct *area)
3046 {
3047 struct snd_pcm_runtime *runtime;
3048 long size;
3049 if (!(area->vm_flags & VM_READ))
3050 return -EINVAL;
3051 runtime = substream->runtime;
3052 size = area->vm_end - area->vm_start;
3053 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3054 return -EINVAL;
3055 area->vm_ops = &snd_pcm_vm_ops_control;
3056 area->vm_private_data = substream;
3057 area->vm_flags |= VM_RESERVED;
3058 return 0;
3059 }
3060 #else /* ! coherent mmap */
3061 /*
3062 * don't support mmap for status and control records.
3063 */
3064 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3065 struct vm_area_struct *area)
3066 {
3067 return -ENXIO;
3068 }
3069 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3070 struct vm_area_struct *area)
3071 {
3072 return -ENXIO;
3073 }
3074 #endif /* coherent mmap */
3075
3076 /*
3077 * fault callback for mmapping a RAM page
3078 */
3079 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3080 struct vm_fault *vmf)
3081 {
3082 struct snd_pcm_substream *substream = area->vm_private_data;
3083 struct snd_pcm_runtime *runtime;
3084 unsigned long offset;
3085 struct page * page;
3086 void *vaddr;
3087 size_t dma_bytes;
3088
3089 if (substream == NULL)
3090 return VM_FAULT_SIGBUS;
3091 runtime = substream->runtime;
3092 offset = vmf->pgoff << PAGE_SHIFT;
3093 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3094 if (offset > dma_bytes - PAGE_SIZE)
3095 return VM_FAULT_SIGBUS;
3096 if (substream->ops->page) {
3097 page = substream->ops->page(substream, offset);
3098 if (!page)
3099 return VM_FAULT_SIGBUS;
3100 } else {
3101 vaddr = runtime->dma_area + offset;
3102 page = virt_to_page(vaddr);
3103 }
3104 get_page(page);
3105 vmf->page = page;
3106 return 0;
3107 }
3108
3109 static struct vm_operations_struct snd_pcm_vm_ops_data =
3110 {
3111 .open = snd_pcm_mmap_data_open,
3112 .close = snd_pcm_mmap_data_close,
3113 .fault = snd_pcm_mmap_data_fault,
3114 };
3115
3116 /*
3117 * mmap the DMA buffer on RAM
3118 */
3119 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3120 struct vm_area_struct *area)
3121 {
3122 area->vm_ops = &snd_pcm_vm_ops_data;
3123 area->vm_private_data = substream;
3124 area->vm_flags |= VM_RESERVED;
3125 atomic_inc(&substream->mmap_count);
3126 return 0;
3127 }
3128
3129 /*
3130 * mmap the DMA buffer on I/O memory area
3131 */
3132 #if SNDRV_PCM_INFO_MMAP_IOMEM
3133 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3134 {
3135 .open = snd_pcm_mmap_data_open,
3136 .close = snd_pcm_mmap_data_close,
3137 };
3138
3139 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3140 struct vm_area_struct *area)
3141 {
3142 long size;
3143 unsigned long offset;
3144
3145 #ifdef pgprot_noncached
3146 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3147 #endif
3148 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3149 area->vm_private_data = substream;
3150 area->vm_flags |= VM_IO;
3151 size = area->vm_end - area->vm_start;
3152 offset = area->vm_pgoff << PAGE_SHIFT;
3153 if (io_remap_pfn_range(area, area->vm_start,
3154 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3155 size, area->vm_page_prot))
3156 return -EAGAIN;
3157 atomic_inc(&substream->mmap_count);
3158 return 0;
3159 }
3160
3161 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3162 #endif /* SNDRV_PCM_INFO_MMAP */
3163
3164 /*
3165 * mmap DMA buffer
3166 */
3167 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3168 struct vm_area_struct *area)
3169 {
3170 struct snd_pcm_runtime *runtime;
3171 long size;
3172 unsigned long offset;
3173 size_t dma_bytes;
3174
3175 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3176 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3177 return -EINVAL;
3178 } else {
3179 if (!(area->vm_flags & VM_READ))
3180 return -EINVAL;
3181 }
3182 runtime = substream->runtime;
3183 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3184 return -EBADFD;
3185 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3186 return -ENXIO;
3187 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3188 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3189 return -EINVAL;
3190 size = area->vm_end - area->vm_start;
3191 offset = area->vm_pgoff << PAGE_SHIFT;
3192 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3193 if ((size_t)size > dma_bytes)
3194 return -EINVAL;
3195 if (offset > dma_bytes - size)
3196 return -EINVAL;
3197
3198 if (substream->ops->mmap)
3199 return substream->ops->mmap(substream, area);
3200 else
3201 return snd_pcm_default_mmap(substream, area);
3202 }
3203
3204 EXPORT_SYMBOL(snd_pcm_mmap_data);
3205
3206 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3207 {
3208 struct snd_pcm_file * pcm_file;
3209 struct snd_pcm_substream *substream;
3210 unsigned long offset;
3211
3212 pcm_file = file->private_data;
3213 substream = pcm_file->substream;
3214 if (PCM_RUNTIME_CHECK(substream))
3215 return -ENXIO;
3216
3217 offset = area->vm_pgoff << PAGE_SHIFT;
3218 switch (offset) {
3219 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3220 if (pcm_file->no_compat_mmap)
3221 return -ENXIO;
3222 return snd_pcm_mmap_status(substream, file, area);
3223 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3224 if (pcm_file->no_compat_mmap)
3225 return -ENXIO;
3226 return snd_pcm_mmap_control(substream, file, area);
3227 default:
3228 return snd_pcm_mmap_data(substream, file, area);
3229 }
3230 return 0;
3231 }
3232
3233 static int snd_pcm_fasync(int fd, struct file * file, int on)
3234 {
3235 struct snd_pcm_file * pcm_file;
3236 struct snd_pcm_substream *substream;
3237 struct snd_pcm_runtime *runtime;
3238 int err = -ENXIO;
3239
3240 lock_kernel();
3241 pcm_file = file->private_data;
3242 substream = pcm_file->substream;
3243 if (PCM_RUNTIME_CHECK(substream))
3244 goto out;
3245 runtime = substream->runtime;
3246 err = fasync_helper(fd, file, on, &runtime->fasync);
3247 out:
3248 unlock_kernel();
3249 if (err < 0)
3250 return err;
3251 return 0;
3252 }
3253
3254 /*
3255 * ioctl32 compat
3256 */
3257 #ifdef CONFIG_COMPAT
3258 #include "pcm_compat.c"
3259 #else
3260 #define snd_pcm_ioctl_compat NULL
3261 #endif
3262
3263 /*
3264 * To be removed helpers to keep binary compatibility
3265 */
3266
3267 #ifdef CONFIG_SND_SUPPORT_OLD_API
3268 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3269 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3270
3271 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3272 struct snd_pcm_hw_params_old *oparams)
3273 {
3274 unsigned int i;
3275
3276 memset(params, 0, sizeof(*params));
3277 params->flags = oparams->flags;
3278 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3279 params->masks[i].bits[0] = oparams->masks[i];
3280 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3281 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3282 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3283 params->info = oparams->info;
3284 params->msbits = oparams->msbits;
3285 params->rate_num = oparams->rate_num;
3286 params->rate_den = oparams->rate_den;
3287 params->fifo_size = oparams->fifo_size;
3288 }
3289
3290 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3291 struct snd_pcm_hw_params *params)
3292 {
3293 unsigned int i;
3294
3295 memset(oparams, 0, sizeof(*oparams));
3296 oparams->flags = params->flags;
3297 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3298 oparams->masks[i] = params->masks[i].bits[0];
3299 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3300 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3301 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3302 oparams->info = params->info;
3303 oparams->msbits = params->msbits;
3304 oparams->rate_num = params->rate_num;
3305 oparams->rate_den = params->rate_den;
3306 oparams->fifo_size = params->fifo_size;
3307 }
3308
3309 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3310 struct snd_pcm_hw_params_old __user * _oparams)
3311 {
3312 struct snd_pcm_hw_params *params;
3313 struct snd_pcm_hw_params_old *oparams = NULL;
3314 int err;
3315
3316 params = kmalloc(sizeof(*params), GFP_KERNEL);
3317 if (!params) {
3318 err = -ENOMEM;
3319 goto out;
3320 }
3321 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3322 if (!oparams) {
3323 err = -ENOMEM;
3324 goto out;
3325 }
3326
3327 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3328 err = -EFAULT;
3329 goto out;
3330 }
3331 snd_pcm_hw_convert_from_old_params(params, oparams);
3332 err = snd_pcm_hw_refine(substream, params);
3333 snd_pcm_hw_convert_to_old_params(oparams, params);
3334 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3335 if (!err)
3336 err = -EFAULT;
3337 }
3338 out:
3339 kfree(params);
3340 kfree(oparams);
3341 return err;
3342 }
3343
3344 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3345 struct snd_pcm_hw_params_old __user * _oparams)
3346 {
3347 struct snd_pcm_hw_params *params;
3348 struct snd_pcm_hw_params_old *oparams = NULL;
3349 int err;
3350
3351 params = kmalloc(sizeof(*params), GFP_KERNEL);
3352 if (!params) {
3353 err = -ENOMEM;
3354 goto out;
3355 }
3356 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3357 if (!oparams) {
3358 err = -ENOMEM;
3359 goto out;
3360 }
3361 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3362 err = -EFAULT;
3363 goto out;
3364 }
3365 snd_pcm_hw_convert_from_old_params(params, oparams);
3366 err = snd_pcm_hw_params(substream, params);
3367 snd_pcm_hw_convert_to_old_params(oparams, params);
3368 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3369 if (!err)
3370 err = -EFAULT;
3371 }
3372 out:
3373 kfree(params);
3374 kfree(oparams);
3375 return err;
3376 }
3377 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3378
3379 #ifndef CONFIG_MMU
3380 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3381 unsigned long len, unsigned long pgoff,
3382 unsigned long flags)
3383 {
3384 return 0;
3385 }
3386 #else
3387 # define dummy_get_unmapped_area NULL
3388 #endif
3389
3390 /*
3391 * Register section
3392 */
3393
3394 const struct file_operations snd_pcm_f_ops[2] = {
3395 {
3396 .owner = THIS_MODULE,
3397 .write = snd_pcm_write,
3398 .aio_write = snd_pcm_aio_write,
3399 .open = snd_pcm_playback_open,
3400 .release = snd_pcm_release,
3401 .poll = snd_pcm_playback_poll,
3402 .unlocked_ioctl = snd_pcm_playback_ioctl,
3403 .compat_ioctl = snd_pcm_ioctl_compat,
3404 .mmap = snd_pcm_mmap,
3405 .fasync = snd_pcm_fasync,
3406 .get_unmapped_area = dummy_get_unmapped_area,
3407 },
3408 {
3409 .owner = THIS_MODULE,
3410 .read = snd_pcm_read,
3411 .aio_read = snd_pcm_aio_read,
3412 .open = snd_pcm_capture_open,
3413 .release = snd_pcm_release,
3414 .poll = snd_pcm_capture_poll,
3415 .unlocked_ioctl = snd_pcm_capture_ioctl,
3416 .compat_ioctl = snd_pcm_ioctl_compat,
3417 .mmap = snd_pcm_mmap,
3418 .fasync = snd_pcm_fasync,
3419 .get_unmapped_area = dummy_get_unmapped_area,
3420 }
3421 };
Linux with added FPC-III support