?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / sound / core / pcm_native.c
blob25ed9fe41b89ceaf245278438c7113bc89ddc0f3
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/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
37 #include <asm/io.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
40 #endif
41
42 /*
43 * Compatibility
44 */
45
46 struct snd_pcm_hw_params_old {
47 unsigned int flags;
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 unsigned int rmask;
53 unsigned int cmask;
54 unsigned int info;
55 unsigned int msbits;
56 unsigned int rate_num;
57 unsigned int rate_den;
58 snd_pcm_uframes_t fifo_size;
59 unsigned char reserved[64];
60 };
61
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
65
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
70 #endif
71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
72
73 /*
74 *
75 */
76
77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
79
80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
81
82 static inline mm_segment_t snd_enter_user(void)
83 {
84 mm_segment_t fs = get_fs();
85 set_fs(get_ds());
86 return fs;
87 }
88
89 static inline void snd_leave_user(mm_segment_t fs)
90 {
91 set_fs(fs);
92 }
93
94
95
96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
97 {
98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
101
102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
116 if (runtime) {
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119 }
120 return 0;
121 }
122
123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
125 {
126 struct snd_pcm_info *info;
127 int err;
128
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
130 if (! info)
131 return -ENOMEM;
132 err = snd_pcm_info(substream, info);
133 if (err >= 0) {
134 if (copy_to_user(_info, info, sizeof(*info)))
135 err = -EFAULT;
136 }
137 kfree(info);
138 return err;
139 }
140
141 #undef RULES_DEBUG
142
143 #ifdef RULES_DEBUG
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names[] = {
146 HW_PARAM(ACCESS),
147 HW_PARAM(FORMAT),
148 HW_PARAM(SUBFORMAT),
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
151 HW_PARAM(CHANNELS),
152 HW_PARAM(RATE),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
156 HW_PARAM(PERIODS),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
160 HW_PARAM(TICK_TIME),
161 };
162 #endif
163
164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
166 {
167 unsigned int k;
168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
175 int changed, again;
176
177 params->info = 0;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 params->msbits = 0;
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
184 }
185
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
189 return -EINVAL;
190 if (!(params->rmask & (1 << k)))
191 continue;
192 #ifdef RULES_DEBUG
193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 #endif
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197 #ifdef RULES_DEBUG
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199 #endif
200 if (changed)
201 params->cmask |= 1 << k;
202 if (changed < 0)
203 return changed;
204 }
205
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
209 return -EINVAL;
210 if (!(params->rmask & (1 << k)))
211 continue;
212 #ifdef RULES_DEBUG
213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
214 if (i->empty)
215 printk("empty");
216 else
217 printk("%c%u %u%c",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220 printk(" -> ");
221 #endif
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
223 #ifdef RULES_DEBUG
224 if (i->empty)
225 printk("empty\n");
226 else
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
230 #endif
231 if (changed)
232 params->cmask |= 1 << k;
233 if (changed < 0)
234 return changed;
235 }
236
237 for (k = 0; k < constrs->rules_num; k++)
238 rstamps[k] = 0;
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241 do {
242 again = 0;
243 for (k = 0; k < constrs->rules_num; k++) {
244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
245 unsigned int d;
246 int doit = 0;
247 if (r->cond && !(r->cond & params->flags))
248 continue;
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
251 doit = 1;
252 break;
253 }
254 }
255 if (!doit)
256 continue;
257 #ifdef RULES_DEBUG
258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
259 if (r->var >= 0) {
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
264 } else {
265 i = hw_param_interval(params, r->var);
266 if (i->empty)
267 printk("empty");
268 else
269 printk("%c%u %u%c",
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
272 }
273 }
274 #endif
275 changed = r->func(params, r);
276 #ifdef RULES_DEBUG
277 if (r->var >= 0) {
278 printk(" -> ");
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
281 else {
282 if (i->empty)
283 printk("empty");
284 else
285 printk("%c%u %u%c",
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
288 }
289 }
290 printk("\n");
291 #endif
292 rstamps[k] = stamp;
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
296 again = 1;
297 }
298 if (changed < 0)
299 return changed;
300 stamp++;
301 }
302 } while (again);
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
307 }
308
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
314 }
315 }
316
317 hw = &substream->runtime->hw;
318 if (!params->info)
319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
327 if (changed < 0)
328 return changed;
329 }
330 }
331 params->rmask = 0;
332 return 0;
333 }
334
335 EXPORT_SYMBOL(snd_pcm_hw_refine);
336
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
339 {
340 struct snd_pcm_hw_params *params;
341 int err;
342
343 params = memdup_user(_params, sizeof(*params));
344 if (IS_ERR(params))
345 return PTR_ERR(params);
346
347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
349 if (!err)
350 err = -EFAULT;
351 }
352
353 kfree(params);
354 return err;
355 }
356
357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
358 {
359 int usecs;
360
361 if (! runtime->rate)
362 return -1; /* invalid */
363
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
367 runtime->rate;
368
369 return usecs;
370 }
371
372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
373 struct snd_pcm_hw_params *params)
374 {
375 struct snd_pcm_runtime *runtime;
376 int err, usecs;
377 unsigned int bits;
378 snd_pcm_uframes_t frames;
379
380 if (PCM_RUNTIME_CHECK(substream))
381 return -ENXIO;
382 runtime = substream->runtime;
383 snd_pcm_stream_lock_irq(substream);
384 switch (runtime->status->state) {
385 case SNDRV_PCM_STATE_OPEN:
386 case SNDRV_PCM_STATE_SETUP:
387 case SNDRV_PCM_STATE_PREPARED:
388 break;
389 default:
390 snd_pcm_stream_unlock_irq(substream);
391 return -EBADFD;
392 }
393 snd_pcm_stream_unlock_irq(substream);
394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
395 if (!substream->oss.oss)
396 #endif
397 if (atomic_read(&substream->mmap_count))
398 return -EBADFD;
399
400 params->rmask = ~0U;
401 err = snd_pcm_hw_refine(substream, params);
402 if (err < 0)
403 goto _error;
404
405 err = snd_pcm_hw_params_choose(substream, params);
406 if (err < 0)
407 goto _error;
408
409 if (substream->ops->hw_params != NULL) {
410 err = substream->ops->hw_params(substream, params);
411 if (err < 0)
412 goto _error;
413 }
414
415 runtime->access = params_access(params);
416 runtime->format = params_format(params);
417 runtime->subformat = params_subformat(params);
418 runtime->channels = params_channels(params);
419 runtime->rate = params_rate(params);
420 runtime->period_size = params_period_size(params);
421 runtime->periods = params_periods(params);
422 runtime->buffer_size = params_buffer_size(params);
423 runtime->info = params->info;
424 runtime->rate_num = params->rate_num;
425 runtime->rate_den = params->rate_den;
426 runtime->no_period_wakeup =
427 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
428 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
429
430 bits = snd_pcm_format_physical_width(runtime->format);
431 runtime->sample_bits = bits;
432 bits *= runtime->channels;
433 runtime->frame_bits = bits;
434 frames = 1;
435 while (bits % 8 != 0) {
436 bits *= 2;
437 frames *= 2;
438 }
439 runtime->byte_align = bits / 8;
440 runtime->min_align = frames;
441
442 /* Default sw params */
443 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
444 runtime->period_step = 1;
445 runtime->control->avail_min = runtime->period_size;
446 runtime->start_threshold = 1;
447 runtime->stop_threshold = runtime->buffer_size;
448 runtime->silence_threshold = 0;
449 runtime->silence_size = 0;
450 runtime->boundary = runtime->buffer_size;
451 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
452 runtime->boundary *= 2;
453
454 snd_pcm_timer_resolution_change(substream);
455 runtime->status->state = SNDRV_PCM_STATE_SETUP;
456
457 if (pm_qos_request_active(&substream->latency_pm_qos_req))
458 pm_qos_remove_request(&substream->latency_pm_qos_req);
459 if ((usecs = period_to_usecs(runtime)) >= 0)
460 pm_qos_add_request(&substream->latency_pm_qos_req,
461 PM_QOS_CPU_DMA_LATENCY, usecs);
462 return 0;
463 _error:
464 /* hardware might be unusable from this time,
465 so we force application to retry to set
466 the correct hardware parameter settings */
467 runtime->status->state = SNDRV_PCM_STATE_OPEN;
468 if (substream->ops->hw_free != NULL)
469 substream->ops->hw_free(substream);
470 return err;
471 }
472
473 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
474 struct snd_pcm_hw_params __user * _params)
475 {
476 struct snd_pcm_hw_params *params;
477 int err;
478
479 params = memdup_user(_params, sizeof(*params));
480 if (IS_ERR(params))
481 return PTR_ERR(params);
482
483 err = snd_pcm_hw_params(substream, params);
484 if (copy_to_user(_params, params, sizeof(*params))) {
485 if (!err)
486 err = -EFAULT;
487 }
488
489 kfree(params);
490 return err;
491 }
492
493 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
494 {
495 struct snd_pcm_runtime *runtime;
496 int result = 0;
497
498 if (PCM_RUNTIME_CHECK(substream))
499 return -ENXIO;
500 runtime = substream->runtime;
501 snd_pcm_stream_lock_irq(substream);
502 switch (runtime->status->state) {
503 case SNDRV_PCM_STATE_SETUP:
504 case SNDRV_PCM_STATE_PREPARED:
505 break;
506 default:
507 snd_pcm_stream_unlock_irq(substream);
508 return -EBADFD;
509 }
510 snd_pcm_stream_unlock_irq(substream);
511 if (atomic_read(&substream->mmap_count))
512 return -EBADFD;
513 if (substream->ops->hw_free)
514 result = substream->ops->hw_free(substream);
515 runtime->status->state = SNDRV_PCM_STATE_OPEN;
516 pm_qos_remove_request(&substream->latency_pm_qos_req);
517 return result;
518 }
519
520 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
521 struct snd_pcm_sw_params *params)
522 {
523 struct snd_pcm_runtime *runtime;
524 int err;
525
526 if (PCM_RUNTIME_CHECK(substream))
527 return -ENXIO;
528 runtime = substream->runtime;
529 snd_pcm_stream_lock_irq(substream);
530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
531 snd_pcm_stream_unlock_irq(substream);
532 return -EBADFD;
533 }
534 snd_pcm_stream_unlock_irq(substream);
535
536 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
537 return -EINVAL;
538 if (params->avail_min == 0)
539 return -EINVAL;
540 if (params->silence_size >= runtime->boundary) {
541 if (params->silence_threshold != 0)
542 return -EINVAL;
543 } else {
544 if (params->silence_size > params->silence_threshold)
545 return -EINVAL;
546 if (params->silence_threshold > runtime->buffer_size)
547 return -EINVAL;
548 }
549 err = 0;
550 snd_pcm_stream_lock_irq(substream);
551 runtime->tstamp_mode = params->tstamp_mode;
552 runtime->period_step = params->period_step;
553 runtime->control->avail_min = params->avail_min;
554 runtime->start_threshold = params->start_threshold;
555 runtime->stop_threshold = params->stop_threshold;
556 runtime->silence_threshold = params->silence_threshold;
557 runtime->silence_size = params->silence_size;
558 params->boundary = runtime->boundary;
559 if (snd_pcm_running(substream)) {
560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
561 runtime->silence_size > 0)
562 snd_pcm_playback_silence(substream, ULONG_MAX);
563 err = snd_pcm_update_state(substream, runtime);
564 }
565 snd_pcm_stream_unlock_irq(substream);
566 return err;
567 }
568
569 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
570 struct snd_pcm_sw_params __user * _params)
571 {
572 struct snd_pcm_sw_params params;
573 int err;
574 if (copy_from_user(&params, _params, sizeof(params)))
575 return -EFAULT;
576 err = snd_pcm_sw_params(substream, &params);
577 if (copy_to_user(_params, &params, sizeof(params)))
578 return -EFAULT;
579 return err;
580 }
581
582 int snd_pcm_status(struct snd_pcm_substream *substream,
583 struct snd_pcm_status *status)
584 {
585 struct snd_pcm_runtime *runtime = substream->runtime;
586
587 snd_pcm_stream_lock_irq(substream);
588 status->state = runtime->status->state;
589 status->suspended_state = runtime->status->suspended_state;
590 if (status->state == SNDRV_PCM_STATE_OPEN)
591 goto _end;
592 status->trigger_tstamp = runtime->trigger_tstamp;
593 if (snd_pcm_running(substream)) {
594 snd_pcm_update_hw_ptr(substream);
595 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
596 status->tstamp = runtime->status->tstamp;
597 goto _tstamp_end;
598 }
599 }
600 snd_pcm_gettime(runtime, &status->tstamp);
601 _tstamp_end:
602 status->appl_ptr = runtime->control->appl_ptr;
603 status->hw_ptr = runtime->status->hw_ptr;
604 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
605 status->avail = snd_pcm_playback_avail(runtime);
606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
607 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
608 status->delay = runtime->buffer_size - status->avail;
609 status->delay += runtime->delay;
610 } else
611 status->delay = 0;
612 } else {
613 status->avail = snd_pcm_capture_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
615 status->delay = status->avail + runtime->delay;
616 else
617 status->delay = 0;
618 }
619 status->avail_max = runtime->avail_max;
620 status->overrange = runtime->overrange;
621 runtime->avail_max = 0;
622 runtime->overrange = 0;
623 _end:
624 snd_pcm_stream_unlock_irq(substream);
625 return 0;
626 }
627
628 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
629 struct snd_pcm_status __user * _status)
630 {
631 struct snd_pcm_status status;
632 int res;
633
634 memset(&status, 0, sizeof(status));
635 res = snd_pcm_status(substream, &status);
636 if (res < 0)
637 return res;
638 if (copy_to_user(_status, &status, sizeof(status)))
639 return -EFAULT;
640 return 0;
641 }
642
643 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
644 struct snd_pcm_channel_info * info)
645 {
646 struct snd_pcm_runtime *runtime;
647 unsigned int channel;
648
649 channel = info->channel;
650 runtime = substream->runtime;
651 snd_pcm_stream_lock_irq(substream);
652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
653 snd_pcm_stream_unlock_irq(substream);
654 return -EBADFD;
655 }
656 snd_pcm_stream_unlock_irq(substream);
657 if (channel >= runtime->channels)
658 return -EINVAL;
659 memset(info, 0, sizeof(*info));
660 info->channel = channel;
661 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
662 }
663
664 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
665 struct snd_pcm_channel_info __user * _info)
666 {
667 struct snd_pcm_channel_info info;
668 int res;
669
670 if (copy_from_user(&info, _info, sizeof(info)))
671 return -EFAULT;
672 res = snd_pcm_channel_info(substream, &info);
673 if (res < 0)
674 return res;
675 if (copy_to_user(_info, &info, sizeof(info)))
676 return -EFAULT;
677 return 0;
678 }
679
680 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
681 {
682 struct snd_pcm_runtime *runtime = substream->runtime;
683 if (runtime->trigger_master == NULL)
684 return;
685 if (runtime->trigger_master == substream) {
686 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
687 } else {
688 snd_pcm_trigger_tstamp(runtime->trigger_master);
689 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
690 }
691 runtime->trigger_master = NULL;
692 }
693
694 struct action_ops {
695 int (*pre_action)(struct snd_pcm_substream *substream, int state);
696 int (*do_action)(struct snd_pcm_substream *substream, int state);
697 void (*undo_action)(struct snd_pcm_substream *substream, int state);
698 void (*post_action)(struct snd_pcm_substream *substream, int state);
699 };
700
701 /*
702 * this functions is core for handling of linked stream
703 * Note: the stream state might be changed also on failure
704 * Note2: call with calling stream lock + link lock
705 */
706 static int snd_pcm_action_group(struct action_ops *ops,
707 struct snd_pcm_substream *substream,
708 int state, int do_lock)
709 {
710 struct snd_pcm_substream *s = NULL;
711 struct snd_pcm_substream *s1;
712 int res = 0;
713
714 snd_pcm_group_for_each_entry(s, substream) {
715 if (do_lock && s != substream)
716 spin_lock_nested(&s->self_group.lock,
717 SINGLE_DEPTH_NESTING);
718 res = ops->pre_action(s, state);
719 if (res < 0)
720 goto _unlock;
721 }
722 snd_pcm_group_for_each_entry(s, substream) {
723 res = ops->do_action(s, state);
724 if (res < 0) {
725 if (ops->undo_action) {
726 snd_pcm_group_for_each_entry(s1, substream) {
727 if (s1 == s) /* failed stream */
728 break;
729 ops->undo_action(s1, state);
730 }
731 }
732 s = NULL; /* unlock all */
733 goto _unlock;
734 }
735 }
736 snd_pcm_group_for_each_entry(s, substream) {
737 ops->post_action(s, state);
738 }
739 _unlock:
740 if (do_lock) {
741 /* unlock streams */
742 snd_pcm_group_for_each_entry(s1, substream) {
743 if (s1 != substream)
744 spin_unlock(&s1->self_group.lock);
745 if (s1 == s) /* end */
746 break;
747 }
748 }
749 return res;
750 }
751
752 /*
753 * Note: call with stream lock
754 */
755 static int snd_pcm_action_single(struct action_ops *ops,
756 struct snd_pcm_substream *substream,
757 int state)
758 {
759 int res;
760
761 res = ops->pre_action(substream, state);
762 if (res < 0)
763 return res;
764 res = ops->do_action(substream, state);
765 if (res == 0)
766 ops->post_action(substream, state);
767 else if (ops->undo_action)
768 ops->undo_action(substream, state);
769 return res;
770 }
771
772 /*
773 * Note: call with stream lock
774 */
775 static int snd_pcm_action(struct action_ops *ops,
776 struct snd_pcm_substream *substream,
777 int state)
778 {
779 int res;
780
781 if (snd_pcm_stream_linked(substream)) {
782 if (!spin_trylock(&substream->group->lock)) {
783 spin_unlock(&substream->self_group.lock);
784 spin_lock(&substream->group->lock);
785 spin_lock(&substream->self_group.lock);
786 }
787 res = snd_pcm_action_group(ops, substream, state, 1);
788 spin_unlock(&substream->group->lock);
789 } else {
790 res = snd_pcm_action_single(ops, substream, state);
791 }
792 return res;
793 }
794
795 /*
796 * Note: don't use any locks before
797 */
798 static int snd_pcm_action_lock_irq(struct action_ops *ops,
799 struct snd_pcm_substream *substream,
800 int state)
801 {
802 int res;
803
804 read_lock_irq(&snd_pcm_link_rwlock);
805 if (snd_pcm_stream_linked(substream)) {
806 spin_lock(&substream->group->lock);
807 spin_lock(&substream->self_group.lock);
808 res = snd_pcm_action_group(ops, substream, state, 1);
809 spin_unlock(&substream->self_group.lock);
810 spin_unlock(&substream->group->lock);
811 } else {
812 spin_lock(&substream->self_group.lock);
813 res = snd_pcm_action_single(ops, substream, state);
814 spin_unlock(&substream->self_group.lock);
815 }
816 read_unlock_irq(&snd_pcm_link_rwlock);
817 return res;
818 }
819
820 /*
821 */
822 static int snd_pcm_action_nonatomic(struct action_ops *ops,
823 struct snd_pcm_substream *substream,
824 int state)
825 {
826 int res;
827
828 down_read(&snd_pcm_link_rwsem);
829 if (snd_pcm_stream_linked(substream))
830 res = snd_pcm_action_group(ops, substream, state, 0);
831 else
832 res = snd_pcm_action_single(ops, substream, state);
833 up_read(&snd_pcm_link_rwsem);
834 return res;
835 }
836
837 /*
838 * start callbacks
839 */
840 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
841 {
842 struct snd_pcm_runtime *runtime = substream->runtime;
843 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
844 return -EBADFD;
845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
846 !snd_pcm_playback_data(substream))
847 return -EPIPE;
848 runtime->trigger_master = substream;
849 return 0;
850 }
851
852 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
853 {
854 if (substream->runtime->trigger_master != substream)
855 return 0;
856 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
857 }
858
859 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
860 {
861 if (substream->runtime->trigger_master == substream)
862 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
863 }
864
865 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
866 {
867 struct snd_pcm_runtime *runtime = substream->runtime;
868 snd_pcm_trigger_tstamp(substream);
869 runtime->hw_ptr_jiffies = jiffies;
870 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
871 runtime->rate;
872 runtime->status->state = state;
873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
874 runtime->silence_size > 0)
875 snd_pcm_playback_silence(substream, ULONG_MAX);
876 if (substream->timer)
877 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
878 &runtime->trigger_tstamp);
879 }
880
881 static struct action_ops snd_pcm_action_start = {
882 .pre_action = snd_pcm_pre_start,
883 .do_action = snd_pcm_do_start,
884 .undo_action = snd_pcm_undo_start,
885 .post_action = snd_pcm_post_start
886 };
887
888 /**
889 * snd_pcm_start - start all linked streams
890 * @substream: the PCM substream instance
891 */
892 int snd_pcm_start(struct snd_pcm_substream *substream)
893 {
894 return snd_pcm_action(&snd_pcm_action_start, substream,
895 SNDRV_PCM_STATE_RUNNING);
896 }
897
898 /*
899 * stop callbacks
900 */
901 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
902 {
903 struct snd_pcm_runtime *runtime = substream->runtime;
904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
905 return -EBADFD;
906 runtime->trigger_master = substream;
907 return 0;
908 }
909
910 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
911 {
912 if (substream->runtime->trigger_master == substream &&
913 snd_pcm_running(substream))
914 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
915 return 0; /* unconditonally stop all substreams */
916 }
917
918 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
919 {
920 struct snd_pcm_runtime *runtime = substream->runtime;
921 if (runtime->status->state != state) {
922 snd_pcm_trigger_tstamp(substream);
923 if (substream->timer)
924 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
925 &runtime->trigger_tstamp);
926 runtime->status->state = state;
927 }
928 wake_up(&runtime->sleep);
929 wake_up(&runtime->tsleep);
930 }
931
932 static struct action_ops snd_pcm_action_stop = {
933 .pre_action = snd_pcm_pre_stop,
934 .do_action = snd_pcm_do_stop,
935 .post_action = snd_pcm_post_stop
936 };
937
938 /**
939 * snd_pcm_stop - try to stop all running streams in the substream group
940 * @substream: the PCM substream instance
941 * @state: PCM state after stopping the stream
942 *
943 * The state of each stream is then changed to the given state unconditionally.
944 */
945 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
946 {
947 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
948 }
949
950 EXPORT_SYMBOL(snd_pcm_stop);
951
952 /**
953 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
954 * @substream: the PCM substream
955 *
956 * After stopping, the state is changed to SETUP.
957 * Unlike snd_pcm_stop(), this affects only the given stream.
958 */
959 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
960 {
961 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
962 SNDRV_PCM_STATE_SETUP);
963 }
964
965 /*
966 * pause callbacks
967 */
968 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
969 {
970 struct snd_pcm_runtime *runtime = substream->runtime;
971 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
972 return -ENOSYS;
973 if (push) {
974 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
975 return -EBADFD;
976 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
977 return -EBADFD;
978 runtime->trigger_master = substream;
979 return 0;
980 }
981
982 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
983 {
984 if (substream->runtime->trigger_master != substream)
985 return 0;
986 /* some drivers might use hw_ptr to recover from the pause -
987 update the hw_ptr now */
988 if (push)
989 snd_pcm_update_hw_ptr(substream);
990 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
991 * a delta between the current jiffies, this gives a large enough
992 * delta, effectively to skip the check once.
993 */
994 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
995 return substream->ops->trigger(substream,
996 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
997 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
998 }
999
1000 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1001 {
1002 if (substream->runtime->trigger_master == substream)
1003 substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1005 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1006 }
1007
1008 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1009 {
1010 struct snd_pcm_runtime *runtime = substream->runtime;
1011 snd_pcm_trigger_tstamp(substream);
1012 if (push) {
1013 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1014 if (substream->timer)
1015 snd_timer_notify(substream->timer,
1016 SNDRV_TIMER_EVENT_MPAUSE,
1017 &runtime->trigger_tstamp);
1018 wake_up(&runtime->sleep);
1019 wake_up(&runtime->tsleep);
1020 } else {
1021 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1022 if (substream->timer)
1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MCONTINUE,
1025 &runtime->trigger_tstamp);
1026 }
1027 }
1028
1029 static struct action_ops snd_pcm_action_pause = {
1030 .pre_action = snd_pcm_pre_pause,
1031 .do_action = snd_pcm_do_pause,
1032 .undo_action = snd_pcm_undo_pause,
1033 .post_action = snd_pcm_post_pause
1034 };
1035
1036 /*
1037 * Push/release the pause for all linked streams.
1038 */
1039 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1040 {
1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1042 }
1043
1044 #ifdef CONFIG_PM
1045 /* suspend */
1046
1047 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1048 {
1049 struct snd_pcm_runtime *runtime = substream->runtime;
1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1051 return -EBUSY;
1052 runtime->trigger_master = substream;
1053 return 0;
1054 }
1055
1056 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1057 {
1058 struct snd_pcm_runtime *runtime = substream->runtime;
1059 if (runtime->trigger_master != substream)
1060 return 0;
1061 if (! snd_pcm_running(substream))
1062 return 0;
1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1064 return 0; /* suspend unconditionally */
1065 }
1066
1067 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1068 {
1069 struct snd_pcm_runtime *runtime = substream->runtime;
1070 snd_pcm_trigger_tstamp(substream);
1071 if (substream->timer)
1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1073 &runtime->trigger_tstamp);
1074 runtime->status->suspended_state = runtime->status->state;
1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1076 wake_up(&runtime->sleep);
1077 wake_up(&runtime->tsleep);
1078 }
1079
1080 static struct action_ops snd_pcm_action_suspend = {
1081 .pre_action = snd_pcm_pre_suspend,
1082 .do_action = snd_pcm_do_suspend,
1083 .post_action = snd_pcm_post_suspend
1084 };
1085
1086 /**
1087 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1088 * @substream: the PCM substream
1089 *
1090 * After this call, all streams are changed to SUSPENDED state.
1091 */
1092 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1093 {
1094 int err;
1095 unsigned long flags;
1096
1097 if (! substream)
1098 return 0;
1099
1100 snd_pcm_stream_lock_irqsave(substream, flags);
1101 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1102 snd_pcm_stream_unlock_irqrestore(substream, flags);
1103 return err;
1104 }
1105
1106 EXPORT_SYMBOL(snd_pcm_suspend);
1107
1108 /**
1109 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1110 * @pcm: the PCM instance
1111 *
1112 * After this call, all streams are changed to SUSPENDED state.
1113 */
1114 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1115 {
1116 struct snd_pcm_substream *substream;
1117 int stream, err = 0;
1118
1119 if (! pcm)
1120 return 0;
1121
1122 for (stream = 0; stream < 2; stream++) {
1123 for (substream = pcm->streams[stream].substream;
1124 substream; substream = substream->next) {
1125 /* FIXME: the open/close code should lock this as well */
1126 if (substream->runtime == NULL)
1127 continue;
1128 err = snd_pcm_suspend(substream);
1129 if (err < 0 && err != -EBUSY)
1130 return err;
1131 }
1132 }
1133 return 0;
1134 }
1135
1136 EXPORT_SYMBOL(snd_pcm_suspend_all);
1137
1138 /* resume */
1139
1140 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1141 {
1142 struct snd_pcm_runtime *runtime = substream->runtime;
1143 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1144 return -ENOSYS;
1145 runtime->trigger_master = substream;
1146 return 0;
1147 }
1148
1149 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1150 {
1151 struct snd_pcm_runtime *runtime = substream->runtime;
1152 if (runtime->trigger_master != substream)
1153 return 0;
1154 /* DMA not running previously? */
1155 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1156 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1157 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1158 return 0;
1159 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1160 }
1161
1162 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1163 {
1164 if (substream->runtime->trigger_master == substream &&
1165 snd_pcm_running(substream))
1166 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1167 }
1168
1169 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1170 {
1171 struct snd_pcm_runtime *runtime = substream->runtime;
1172 snd_pcm_trigger_tstamp(substream);
1173 if (substream->timer)
1174 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1175 &runtime->trigger_tstamp);
1176 runtime->status->state = runtime->status->suspended_state;
1177 }
1178
1179 static struct action_ops snd_pcm_action_resume = {
1180 .pre_action = snd_pcm_pre_resume,
1181 .do_action = snd_pcm_do_resume,
1182 .undo_action = snd_pcm_undo_resume,
1183 .post_action = snd_pcm_post_resume
1184 };
1185
1186 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1187 {
1188 struct snd_card *card = substream->pcm->card;
1189 int res;
1190
1191 snd_power_lock(card);
1192 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1193 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1194 snd_power_unlock(card);
1195 return res;
1196 }
1197
1198 #else
1199
1200 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1201 {
1202 return -ENOSYS;
1203 }
1204
1205 #endif /* CONFIG_PM */
1206
1207 /*
1208 * xrun ioctl
1209 *
1210 * Change the RUNNING stream(s) to XRUN state.
1211 */
1212 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1213 {
1214 struct snd_card *card = substream->pcm->card;
1215 struct snd_pcm_runtime *runtime = substream->runtime;
1216 int result;
1217
1218 snd_power_lock(card);
1219 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1220 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1221 if (result < 0)
1222 goto _unlock;
1223 }
1224
1225 snd_pcm_stream_lock_irq(substream);
1226 switch (runtime->status->state) {
1227 case SNDRV_PCM_STATE_XRUN:
1228 result = 0; /* already there */
1229 break;
1230 case SNDRV_PCM_STATE_RUNNING:
1231 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1232 break;
1233 default:
1234 result = -EBADFD;
1235 }
1236 snd_pcm_stream_unlock_irq(substream);
1237 _unlock:
1238 snd_power_unlock(card);
1239 return result;
1240 }
1241
1242 /*
1243 * reset ioctl
1244 */
1245 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1246 {
1247 struct snd_pcm_runtime *runtime = substream->runtime;
1248 switch (runtime->status->state) {
1249 case SNDRV_PCM_STATE_RUNNING:
1250 case SNDRV_PCM_STATE_PREPARED:
1251 case SNDRV_PCM_STATE_PAUSED:
1252 case SNDRV_PCM_STATE_SUSPENDED:
1253 return 0;
1254 default:
1255 return -EBADFD;
1256 }
1257 }
1258
1259 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1260 {
1261 struct snd_pcm_runtime *runtime = substream->runtime;
1262 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1263 if (err < 0)
1264 return err;
1265 runtime->hw_ptr_base = 0;
1266 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1267 runtime->status->hw_ptr % runtime->period_size;
1268 runtime->silence_start = runtime->status->hw_ptr;
1269 runtime->silence_filled = 0;
1270 return 0;
1271 }
1272
1273 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1274 {
1275 struct snd_pcm_runtime *runtime = substream->runtime;
1276 runtime->control->appl_ptr = runtime->status->hw_ptr;
1277 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1278 runtime->silence_size > 0)
1279 snd_pcm_playback_silence(substream, ULONG_MAX);
1280 }
1281
1282 static struct action_ops snd_pcm_action_reset = {
1283 .pre_action = snd_pcm_pre_reset,
1284 .do_action = snd_pcm_do_reset,
1285 .post_action = snd_pcm_post_reset
1286 };
1287
1288 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1289 {
1290 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1291 }
1292
1293 /*
1294 * prepare ioctl
1295 */
1296 /* we use the second argument for updating f_flags */
1297 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1298 int f_flags)
1299 {
1300 struct snd_pcm_runtime *runtime = substream->runtime;
1301 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1302 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1303 return -EBADFD;
1304 if (snd_pcm_running(substream))
1305 return -EBUSY;
1306 substream->f_flags = f_flags;
1307 return 0;
1308 }
1309
1310 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1311 {
1312 int err;
1313 err = substream->ops->prepare(substream);
1314 if (err < 0)
1315 return err;
1316 return snd_pcm_do_reset(substream, 0);
1317 }
1318
1319 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1320 {
1321 struct snd_pcm_runtime *runtime = substream->runtime;
1322 runtime->control->appl_ptr = runtime->status->hw_ptr;
1323 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1324 }
1325
1326 static struct action_ops snd_pcm_action_prepare = {
1327 .pre_action = snd_pcm_pre_prepare,
1328 .do_action = snd_pcm_do_prepare,
1329 .post_action = snd_pcm_post_prepare
1330 };
1331
1332 /**
1333 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1334 * @substream: the PCM substream instance
1335 * @file: file to refer f_flags
1336 */
1337 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1338 struct file *file)
1339 {
1340 int res;
1341 struct snd_card *card = substream->pcm->card;
1342 int f_flags;
1343
1344 if (file)
1345 f_flags = file->f_flags;
1346 else
1347 f_flags = substream->f_flags;
1348
1349 snd_power_lock(card);
1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1351 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1352 substream, f_flags);
1353 snd_power_unlock(card);
1354 return res;
1355 }
1356
1357 /*
1358 * drain ioctl
1359 */
1360
1361 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363 substream->runtime->trigger_master = substream;
1364 return 0;
1365 }
1366
1367 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1368 {
1369 struct snd_pcm_runtime *runtime = substream->runtime;
1370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1371 switch (runtime->status->state) {
1372 case SNDRV_PCM_STATE_PREPARED:
1373 /* start playback stream if possible */
1374 if (! snd_pcm_playback_empty(substream)) {
1375 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1376 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1377 }
1378 break;
1379 case SNDRV_PCM_STATE_RUNNING:
1380 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1381 break;
1382 default:
1383 break;
1384 }
1385 } else {
1386 /* stop running stream */
1387 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1388 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1389 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1390 snd_pcm_do_stop(substream, new_state);
1391 snd_pcm_post_stop(substream, new_state);
1392 }
1393 }
1394 return 0;
1395 }
1396
1397 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1398 {
1399 }
1400
1401 static struct action_ops snd_pcm_action_drain_init = {
1402 .pre_action = snd_pcm_pre_drain_init,
1403 .do_action = snd_pcm_do_drain_init,
1404 .post_action = snd_pcm_post_drain_init
1405 };
1406
1407 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1408
1409 /*
1410 * Drain the stream(s).
1411 * When the substream is linked, sync until the draining of all playback streams
1412 * is finished.
1413 * After this call, all streams are supposed to be either SETUP or DRAINING
1414 * (capture only) state.
1415 */
1416 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1417 struct file *file)
1418 {
1419 struct snd_card *card;
1420 struct snd_pcm_runtime *runtime;
1421 struct snd_pcm_substream *s;
1422 wait_queue_t wait;
1423 int result = 0;
1424 int nonblock = 0;
1425
1426 card = substream->pcm->card;
1427 runtime = substream->runtime;
1428
1429 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1430 return -EBADFD;
1431
1432 snd_power_lock(card);
1433 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1434 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1435 if (result < 0) {
1436 snd_power_unlock(card);
1437 return result;
1438 }
1439 }
1440
1441 if (file) {
1442 if (file->f_flags & O_NONBLOCK)
1443 nonblock = 1;
1444 } else if (substream->f_flags & O_NONBLOCK)
1445 nonblock = 1;
1446
1447 down_read(&snd_pcm_link_rwsem);
1448 snd_pcm_stream_lock_irq(substream);
1449 /* resume pause */
1450 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1451 snd_pcm_pause(substream, 0);
1452
1453 /* pre-start/stop - all running streams are changed to DRAINING state */
1454 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1455 if (result < 0)
1456 goto unlock;
1457 /* in non-blocking, we don't wait in ioctl but let caller poll */
1458 if (nonblock) {
1459 result = -EAGAIN;
1460 goto unlock;
1461 }
1462
1463 for (;;) {
1464 long tout;
1465 struct snd_pcm_runtime *to_check;
1466 if (signal_pending(current)) {
1467 result = -ERESTARTSYS;
1468 break;
1469 }
1470 /* find a substream to drain */
1471 to_check = NULL;
1472 snd_pcm_group_for_each_entry(s, substream) {
1473 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1474 continue;
1475 runtime = s->runtime;
1476 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1477 to_check = runtime;
1478 break;
1479 }
1480 }
1481 if (!to_check)
1482 break; /* all drained */
1483 init_waitqueue_entry(&wait, current);
1484 add_wait_queue(&to_check->sleep, &wait);
1485 snd_pcm_stream_unlock_irq(substream);
1486 up_read(&snd_pcm_link_rwsem);
1487 snd_power_unlock(card);
1488 if (runtime->no_period_wakeup)
1489 tout = MAX_SCHEDULE_TIMEOUT;
1490 else {
1491 tout = 10;
1492 if (runtime->rate) {
1493 long t = runtime->period_size * 2 / runtime->rate;
1494 tout = max(t, tout);
1495 }
1496 tout = msecs_to_jiffies(tout * 1000);
1497 }
1498 tout = schedule_timeout_interruptible(tout);
1499 snd_power_lock(card);
1500 down_read(&snd_pcm_link_rwsem);
1501 snd_pcm_stream_lock_irq(substream);
1502 remove_wait_queue(&to_check->sleep, &wait);
1503 if (tout == 0) {
1504 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1505 result = -ESTRPIPE;
1506 else {
1507 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1508 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1509 result = -EIO;
1510 }
1511 break;
1512 }
1513 }
1514
1515 unlock:
1516 snd_pcm_stream_unlock_irq(substream);
1517 up_read(&snd_pcm_link_rwsem);
1518 snd_power_unlock(card);
1519
1520 return result;
1521 }
1522
1523 /*
1524 * drop ioctl
1525 *
1526 * Immediately put all linked substreams into SETUP state.
1527 */
1528 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1529 {
1530 struct snd_pcm_runtime *runtime;
1531 int result = 0;
1532
1533 if (PCM_RUNTIME_CHECK(substream))
1534 return -ENXIO;
1535 runtime = substream->runtime;
1536
1537 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1538 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1539 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1540 return -EBADFD;
1541
1542 snd_pcm_stream_lock_irq(substream);
1543 /* resume pause */
1544 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1545 snd_pcm_pause(substream, 0);
1546
1547 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1548 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1549 snd_pcm_stream_unlock_irq(substream);
1550
1551 return result;
1552 }
1553
1554
1555 /* WARNING: Don't forget to fput back the file */
1556 static struct file *snd_pcm_file_fd(int fd)
1557 {
1558 struct file *file;
1559 struct inode *inode;
1560 unsigned int minor;
1561
1562 file = fget(fd);
1563 if (!file)
1564 return NULL;
1565 inode = file->f_path.dentry->d_inode;
1566 if (!S_ISCHR(inode->i_mode) ||
1567 imajor(inode) != snd_major) {
1568 fput(file);
1569 return NULL;
1570 }
1571 minor = iminor(inode);
1572 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1573 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1574 fput(file);
1575 return NULL;
1576 }
1577 return file;
1578 }
1579
1580 /*
1581 * PCM link handling
1582 */
1583 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1584 {
1585 int res = 0;
1586 struct file *file;
1587 struct snd_pcm_file *pcm_file;
1588 struct snd_pcm_substream *substream1;
1589
1590 file = snd_pcm_file_fd(fd);
1591 if (!file)
1592 return -EBADFD;
1593 pcm_file = file->private_data;
1594 substream1 = pcm_file->substream;
1595 down_write(&snd_pcm_link_rwsem);
1596 write_lock_irq(&snd_pcm_link_rwlock);
1597 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1598 substream->runtime->status->state != substream1->runtime->status->state) {
1599 res = -EBADFD;
1600 goto _end;
1601 }
1602 if (snd_pcm_stream_linked(substream1)) {
1603 res = -EALREADY;
1604 goto _end;
1605 }
1606 if (!snd_pcm_stream_linked(substream)) {
1607 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1608 if (substream->group == NULL) {
1609 res = -ENOMEM;
1610 goto _end;
1611 }
1612 spin_lock_init(&substream->group->lock);
1613 INIT_LIST_HEAD(&substream->group->substreams);
1614 list_add_tail(&substream->link_list, &substream->group->substreams);
1615 substream->group->count = 1;
1616 }
1617 list_add_tail(&substream1->link_list, &substream->group->substreams);
1618 substream->group->count++;
1619 substream1->group = substream->group;
1620 _end:
1621 write_unlock_irq(&snd_pcm_link_rwlock);
1622 up_write(&snd_pcm_link_rwsem);
1623 fput(file);
1624 return res;
1625 }
1626
1627 static void relink_to_local(struct snd_pcm_substream *substream)
1628 {
1629 substream->group = &substream->self_group;
1630 INIT_LIST_HEAD(&substream->self_group.substreams);
1631 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1632 }
1633
1634 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1635 {
1636 struct snd_pcm_substream *s;
1637 int res = 0;
1638
1639 down_write(&snd_pcm_link_rwsem);
1640 write_lock_irq(&snd_pcm_link_rwlock);
1641 if (!snd_pcm_stream_linked(substream)) {
1642 res = -EALREADY;
1643 goto _end;
1644 }
1645 list_del(&substream->link_list);
1646 substream->group->count--;
1647 if (substream->group->count == 1) { /* detach the last stream, too */
1648 snd_pcm_group_for_each_entry(s, substream) {
1649 relink_to_local(s);
1650 break;
1651 }
1652 kfree(substream->group);
1653 }
1654 relink_to_local(substream);
1655 _end:
1656 write_unlock_irq(&snd_pcm_link_rwlock);
1657 up_write(&snd_pcm_link_rwsem);
1658 return res;
1659 }
1660
1661 /*
1662 * hw configurator
1663 */
1664 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1665 struct snd_pcm_hw_rule *rule)
1666 {
1667 struct snd_interval t;
1668 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1669 hw_param_interval_c(params, rule->deps[1]), &t);
1670 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1671 }
1672
1673 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1674 struct snd_pcm_hw_rule *rule)
1675 {
1676 struct snd_interval t;
1677 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1678 hw_param_interval_c(params, rule->deps[1]), &t);
1679 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1680 }
1681
1682 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1683 struct snd_pcm_hw_rule *rule)
1684 {
1685 struct snd_interval t;
1686 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1687 hw_param_interval_c(params, rule->deps[1]),
1688 (unsigned long) rule->private, &t);
1689 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1690 }
1691
1692 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1693 struct snd_pcm_hw_rule *rule)
1694 {
1695 struct snd_interval t;
1696 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1697 (unsigned long) rule->private,
1698 hw_param_interval_c(params, rule->deps[1]), &t);
1699 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1700 }
1701
1702 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1703 struct snd_pcm_hw_rule *rule)
1704 {
1705 unsigned int k;
1706 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1707 struct snd_mask m;
1708 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1709 snd_mask_any(&m);
1710 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1711 int bits;
1712 if (! snd_mask_test(mask, k))
1713 continue;
1714 bits = snd_pcm_format_physical_width(k);
1715 if (bits <= 0)
1716 continue; /* ignore invalid formats */
1717 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1718 snd_mask_reset(&m, k);
1719 }
1720 return snd_mask_refine(mask, &m);
1721 }
1722
1723 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1724 struct snd_pcm_hw_rule *rule)
1725 {
1726 struct snd_interval t;
1727 unsigned int k;
1728 t.min = UINT_MAX;
1729 t.max = 0;
1730 t.openmin = 0;
1731 t.openmax = 0;
1732 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1733 int bits;
1734 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1735 continue;
1736 bits = snd_pcm_format_physical_width(k);
1737 if (bits <= 0)
1738 continue; /* ignore invalid formats */
1739 if (t.min > (unsigned)bits)
1740 t.min = bits;
1741 if (t.max < (unsigned)bits)
1742 t.max = bits;
1743 }
1744 t.integer = 1;
1745 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1746 }
1747
1748 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1749 #error "Change this table"
1750 #endif
1751
1752 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1753 48000, 64000, 88200, 96000, 176400, 192000 };
1754
1755 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1756 .count = ARRAY_SIZE(rates),
1757 .list = rates,
1758 };
1759
1760 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1761 struct snd_pcm_hw_rule *rule)
1762 {
1763 struct snd_pcm_hardware *hw = rule->private;
1764 return snd_interval_list(hw_param_interval(params, rule->var),
1765 snd_pcm_known_rates.count,
1766 snd_pcm_known_rates.list, hw->rates);
1767 }
1768
1769 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1770 struct snd_pcm_hw_rule *rule)
1771 {
1772 struct snd_interval t;
1773 struct snd_pcm_substream *substream = rule->private;
1774 t.min = 0;
1775 t.max = substream->buffer_bytes_max;
1776 t.openmin = 0;
1777 t.openmax = 0;
1778 t.integer = 1;
1779 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1780 }
1781
1782 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1783 {
1784 struct snd_pcm_runtime *runtime = substream->runtime;
1785 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1786 int k, err;
1787
1788 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1789 snd_mask_any(constrs_mask(constrs, k));
1790 }
1791
1792 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1793 snd_interval_any(constrs_interval(constrs, k));
1794 }
1795
1796 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1797 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1798 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1799 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1800 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1801
1802 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1803 snd_pcm_hw_rule_format, NULL,
1804 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1805 if (err < 0)
1806 return err;
1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1808 snd_pcm_hw_rule_sample_bits, NULL,
1809 SNDRV_PCM_HW_PARAM_FORMAT,
1810 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1811 if (err < 0)
1812 return err;
1813 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1814 snd_pcm_hw_rule_div, NULL,
1815 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1816 if (err < 0)
1817 return err;
1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1819 snd_pcm_hw_rule_mul, NULL,
1820 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1821 if (err < 0)
1822 return err;
1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1824 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1825 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1826 if (err < 0)
1827 return err;
1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1829 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1830 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1831 if (err < 0)
1832 return err;
1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1834 snd_pcm_hw_rule_div, NULL,
1835 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1839 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1840 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1844 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1845 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1849 snd_pcm_hw_rule_div, NULL,
1850 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1854 snd_pcm_hw_rule_div, NULL,
1855 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1859 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1860 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1864 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1865 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1869 snd_pcm_hw_rule_mul, NULL,
1870 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1871 if (err < 0)
1872 return err;
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1874 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1875 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1876 if (err < 0)
1877 return err;
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1879 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1880 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1881 if (err < 0)
1882 return err;
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1884 snd_pcm_hw_rule_muldivk, (void*) 8,
1885 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1886 if (err < 0)
1887 return err;
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1889 snd_pcm_hw_rule_muldivk, (void*) 8,
1890 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1891 if (err < 0)
1892 return err;
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1894 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1895 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1896 if (err < 0)
1897 return err;
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1899 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1900 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1901 if (err < 0)
1902 return err;
1903 return 0;
1904 }
1905
1906 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1907 {
1908 struct snd_pcm_runtime *runtime = substream->runtime;
1909 struct snd_pcm_hardware *hw = &runtime->hw;
1910 int err;
1911 unsigned int mask = 0;
1912
1913 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1914 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1915 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1916 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1917 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1918 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1919 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1920 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1921 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1922 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1923 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1924 }
1925 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1926 if (err < 0)
1927 return err;
1928
1929 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1930 if (err < 0)
1931 return err;
1932
1933 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1934 if (err < 0)
1935 return err;
1936
1937 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1938 hw->channels_min, hw->channels_max);
1939 if (err < 0)
1940 return err;
1941
1942 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1943 hw->rate_min, hw->rate_max);
1944 if (err < 0)
1945 return err;
1946
1947 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1948 hw->period_bytes_min, hw->period_bytes_max);
1949 if (err < 0)
1950 return err;
1951
1952 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1953 hw->periods_min, hw->periods_max);
1954 if (err < 0)
1955 return err;
1956
1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1958 hw->period_bytes_min, hw->buffer_bytes_max);
1959 if (err < 0)
1960 return err;
1961
1962 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1963 snd_pcm_hw_rule_buffer_bytes_max, substream,
1964 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1965 if (err < 0)
1966 return err;
1967
1968 /* FIXME: remove */
1969 if (runtime->dma_bytes) {
1970 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1971 if (err < 0)
1972 return -EINVAL;
1973 }
1974
1975 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1976 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1977 snd_pcm_hw_rule_rate, hw,
1978 SNDRV_PCM_HW_PARAM_RATE, -1);
1979 if (err < 0)
1980 return err;
1981 }
1982
1983 /* FIXME: this belong to lowlevel */
1984 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1985
1986 return 0;
1987 }
1988
1989 static void pcm_release_private(struct snd_pcm_substream *substream)
1990 {
1991 snd_pcm_unlink(substream);
1992 }
1993
1994 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1995 {
1996 substream->ref_count--;
1997 if (substream->ref_count > 0)
1998 return;
1999
2000 snd_pcm_drop(substream);
2001 if (substream->hw_opened) {
2002 if (substream->ops->hw_free != NULL)
2003 substream->ops->hw_free(substream);
2004 substream->ops->close(substream);
2005 substream->hw_opened = 0;
2006 }
2007 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2008 pm_qos_remove_request(&substream->latency_pm_qos_req);
2009 if (substream->pcm_release) {
2010 substream->pcm_release(substream);
2011 substream->pcm_release = NULL;
2012 }
2013 snd_pcm_detach_substream(substream);
2014 }
2015
2016 EXPORT_SYMBOL(snd_pcm_release_substream);
2017
2018 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2019 struct file *file,
2020 struct snd_pcm_substream **rsubstream)
2021 {
2022 struct snd_pcm_substream *substream;
2023 int err;
2024
2025 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2026 if (err < 0)
2027 return err;
2028 if (substream->ref_count > 1) {
2029 *rsubstream = substream;
2030 return 0;
2031 }
2032
2033 err = snd_pcm_hw_constraints_init(substream);
2034 if (err < 0) {
2035 snd_printd("snd_pcm_hw_constraints_init failed\n");
2036 goto error;
2037 }
2038
2039 if ((err = substream->ops->open(substream)) < 0)
2040 goto error;
2041
2042 substream->hw_opened = 1;
2043
2044 err = snd_pcm_hw_constraints_complete(substream);
2045 if (err < 0) {
2046 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2047 goto error;
2048 }
2049
2050 *rsubstream = substream;
2051 return 0;
2052
2053 error:
2054 snd_pcm_release_substream(substream);
2055 return err;
2056 }
2057
2058 EXPORT_SYMBOL(snd_pcm_open_substream);
2059
2060 static int snd_pcm_open_file(struct file *file,
2061 struct snd_pcm *pcm,
2062 int stream)
2063 {
2064 struct snd_pcm_file *pcm_file;
2065 struct snd_pcm_substream *substream;
2066 int err;
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 substream->file = pcm_file;
2080 substream->pcm_release = pcm_release_private;
2081 }
2082 file->private_data = pcm_file;
2083
2084 return 0;
2085 }
2086
2087 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2088 {
2089 struct snd_pcm *pcm;
2090 int err = nonseekable_open(inode, file);
2091 if (err < 0)
2092 return err;
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 int err = nonseekable_open(inode, file);
2102 if (err < 0)
2103 return err;
2104 pcm = snd_lookup_minor_data(iminor(inode),
2105 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2106 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2107 }
2108
2109 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2110 {
2111 int err;
2112 wait_queue_t wait;
2113
2114 if (pcm == NULL) {
2115 err = -ENODEV;
2116 goto __error1;
2117 }
2118 err = snd_card_file_add(pcm->card, file);
2119 if (err < 0)
2120 goto __error1;
2121 if (!try_module_get(pcm->card->module)) {
2122 err = -EFAULT;
2123 goto __error2;
2124 }
2125 init_waitqueue_entry(&wait, current);
2126 add_wait_queue(&pcm->open_wait, &wait);
2127 mutex_lock(&pcm->open_mutex);
2128 while (1) {
2129 err = snd_pcm_open_file(file, pcm, stream);
2130 if (err >= 0)
2131 break;
2132 if (err == -EAGAIN) {
2133 if (file->f_flags & O_NONBLOCK) {
2134 err = -EBUSY;
2135 break;
2136 }
2137 } else
2138 break;
2139 set_current_state(TASK_INTERRUPTIBLE);
2140 mutex_unlock(&pcm->open_mutex);
2141 schedule();
2142 mutex_lock(&pcm->open_mutex);
2143 if (signal_pending(current)) {
2144 err = -ERESTARTSYS;
2145 break;
2146 }
2147 }
2148 remove_wait_queue(&pcm->open_wait, &wait);
2149 mutex_unlock(&pcm->open_mutex);
2150 if (err < 0)
2151 goto __error;
2152 return err;
2153
2154 __error:
2155 module_put(pcm->card->module);
2156 __error2:
2157 snd_card_file_remove(pcm->card, file);
2158 __error1:
2159 return err;
2160 }
2161
2162 static int snd_pcm_release(struct inode *inode, struct file *file)
2163 {
2164 struct snd_pcm *pcm;
2165 struct snd_pcm_substream *substream;
2166 struct snd_pcm_file *pcm_file;
2167
2168 pcm_file = file->private_data;
2169 substream = pcm_file->substream;
2170 if (snd_BUG_ON(!substream))
2171 return -ENXIO;
2172 pcm = substream->pcm;
2173 mutex_lock(&pcm->open_mutex);
2174 snd_pcm_release_substream(substream);
2175 kfree(pcm_file);
2176 mutex_unlock(&pcm->open_mutex);
2177 wake_up(&pcm->open_wait);
2178 module_put(pcm->card->module);
2179 snd_card_file_remove(pcm->card, file);
2180 return 0;
2181 }
2182
2183 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2184 snd_pcm_uframes_t frames)
2185 {
2186 struct snd_pcm_runtime *runtime = substream->runtime;
2187 snd_pcm_sframes_t appl_ptr;
2188 snd_pcm_sframes_t ret;
2189 snd_pcm_sframes_t hw_avail;
2190
2191 if (frames == 0)
2192 return 0;
2193
2194 snd_pcm_stream_lock_irq(substream);
2195 switch (runtime->status->state) {
2196 case SNDRV_PCM_STATE_PREPARED:
2197 break;
2198 case SNDRV_PCM_STATE_DRAINING:
2199 case SNDRV_PCM_STATE_RUNNING:
2200 if (snd_pcm_update_hw_ptr(substream) >= 0)
2201 break;
2202 /* Fall through */
2203 case SNDRV_PCM_STATE_XRUN:
2204 ret = -EPIPE;
2205 goto __end;
2206 case SNDRV_PCM_STATE_SUSPENDED:
2207 ret = -ESTRPIPE;
2208 goto __end;
2209 default:
2210 ret = -EBADFD;
2211 goto __end;
2212 }
2213
2214 hw_avail = snd_pcm_playback_hw_avail(runtime);
2215 if (hw_avail <= 0) {
2216 ret = 0;
2217 goto __end;
2218 }
2219 if (frames > (snd_pcm_uframes_t)hw_avail)
2220 frames = hw_avail;
2221 appl_ptr = runtime->control->appl_ptr - frames;
2222 if (appl_ptr < 0)
2223 appl_ptr += runtime->boundary;
2224 runtime->control->appl_ptr = appl_ptr;
2225 ret = frames;
2226 __end:
2227 snd_pcm_stream_unlock_irq(substream);
2228 return ret;
2229 }
2230
2231 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2232 snd_pcm_uframes_t frames)
2233 {
2234 struct snd_pcm_runtime *runtime = substream->runtime;
2235 snd_pcm_sframes_t appl_ptr;
2236 snd_pcm_sframes_t ret;
2237 snd_pcm_sframes_t hw_avail;
2238
2239 if (frames == 0)
2240 return 0;
2241
2242 snd_pcm_stream_lock_irq(substream);
2243 switch (runtime->status->state) {
2244 case SNDRV_PCM_STATE_PREPARED:
2245 case SNDRV_PCM_STATE_DRAINING:
2246 break;
2247 case SNDRV_PCM_STATE_RUNNING:
2248 if (snd_pcm_update_hw_ptr(substream) >= 0)
2249 break;
2250 /* Fall through */
2251 case SNDRV_PCM_STATE_XRUN:
2252 ret = -EPIPE;
2253 goto __end;
2254 case SNDRV_PCM_STATE_SUSPENDED:
2255 ret = -ESTRPIPE;
2256 goto __end;
2257 default:
2258 ret = -EBADFD;
2259 goto __end;
2260 }
2261
2262 hw_avail = snd_pcm_capture_hw_avail(runtime);
2263 if (hw_avail <= 0) {
2264 ret = 0;
2265 goto __end;
2266 }
2267 if (frames > (snd_pcm_uframes_t)hw_avail)
2268 frames = hw_avail;
2269 appl_ptr = runtime->control->appl_ptr - frames;
2270 if (appl_ptr < 0)
2271 appl_ptr += runtime->boundary;
2272 runtime->control->appl_ptr = appl_ptr;
2273 ret = frames;
2274 __end:
2275 snd_pcm_stream_unlock_irq(substream);
2276 return ret;
2277 }
2278
2279 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2280 snd_pcm_uframes_t frames)
2281 {
2282 struct snd_pcm_runtime *runtime = substream->runtime;
2283 snd_pcm_sframes_t appl_ptr;
2284 snd_pcm_sframes_t ret;
2285 snd_pcm_sframes_t avail;
2286
2287 if (frames == 0)
2288 return 0;
2289
2290 snd_pcm_stream_lock_irq(substream);
2291 switch (runtime->status->state) {
2292 case SNDRV_PCM_STATE_PREPARED:
2293 case SNDRV_PCM_STATE_PAUSED:
2294 break;
2295 case SNDRV_PCM_STATE_DRAINING:
2296 case SNDRV_PCM_STATE_RUNNING:
2297 if (snd_pcm_update_hw_ptr(substream) >= 0)
2298 break;
2299 /* Fall through */
2300 case SNDRV_PCM_STATE_XRUN:
2301 ret = -EPIPE;
2302 goto __end;
2303 case SNDRV_PCM_STATE_SUSPENDED:
2304 ret = -ESTRPIPE;
2305 goto __end;
2306 default:
2307 ret = -EBADFD;
2308 goto __end;
2309 }
2310
2311 avail = snd_pcm_playback_avail(runtime);
2312 if (avail <= 0) {
2313 ret = 0;
2314 goto __end;
2315 }
2316 if (frames > (snd_pcm_uframes_t)avail)
2317 frames = avail;
2318 appl_ptr = runtime->control->appl_ptr + frames;
2319 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2320 appl_ptr -= runtime->boundary;
2321 runtime->control->appl_ptr = appl_ptr;
2322 ret = frames;
2323 __end:
2324 snd_pcm_stream_unlock_irq(substream);
2325 return ret;
2326 }
2327
2328 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2329 snd_pcm_uframes_t frames)
2330 {
2331 struct snd_pcm_runtime *runtime = substream->runtime;
2332 snd_pcm_sframes_t appl_ptr;
2333 snd_pcm_sframes_t ret;
2334 snd_pcm_sframes_t avail;
2335
2336 if (frames == 0)
2337 return 0;
2338
2339 snd_pcm_stream_lock_irq(substream);
2340 switch (runtime->status->state) {
2341 case SNDRV_PCM_STATE_PREPARED:
2342 case SNDRV_PCM_STATE_DRAINING:
2343 case SNDRV_PCM_STATE_PAUSED:
2344 break;
2345 case SNDRV_PCM_STATE_RUNNING:
2346 if (snd_pcm_update_hw_ptr(substream) >= 0)
2347 break;
2348 /* Fall through */
2349 case SNDRV_PCM_STATE_XRUN:
2350 ret = -EPIPE;
2351 goto __end;
2352 case SNDRV_PCM_STATE_SUSPENDED:
2353 ret = -ESTRPIPE;
2354 goto __end;
2355 default:
2356 ret = -EBADFD;
2357 goto __end;
2358 }
2359
2360 avail = snd_pcm_capture_avail(runtime);
2361 if (avail <= 0) {
2362 ret = 0;
2363 goto __end;
2364 }
2365 if (frames > (snd_pcm_uframes_t)avail)
2366 frames = avail;
2367 appl_ptr = runtime->control->appl_ptr + frames;
2368 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2369 appl_ptr -= runtime->boundary;
2370 runtime->control->appl_ptr = appl_ptr;
2371 ret = frames;
2372 __end:
2373 snd_pcm_stream_unlock_irq(substream);
2374 return ret;
2375 }
2376
2377 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2378 {
2379 struct snd_pcm_runtime *runtime = substream->runtime;
2380 int err;
2381
2382 snd_pcm_stream_lock_irq(substream);
2383 switch (runtime->status->state) {
2384 case SNDRV_PCM_STATE_DRAINING:
2385 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2386 goto __badfd;
2387 case SNDRV_PCM_STATE_RUNNING:
2388 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2389 break;
2390 /* Fall through */
2391 case SNDRV_PCM_STATE_PREPARED:
2392 case SNDRV_PCM_STATE_SUSPENDED:
2393 err = 0;
2394 break;
2395 case SNDRV_PCM_STATE_XRUN:
2396 err = -EPIPE;
2397 break;
2398 default:
2399 __badfd:
2400 err = -EBADFD;
2401 break;
2402 }
2403 snd_pcm_stream_unlock_irq(substream);
2404 return err;
2405 }
2406
2407 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2408 snd_pcm_sframes_t __user *res)
2409 {
2410 struct snd_pcm_runtime *runtime = substream->runtime;
2411 int err;
2412 snd_pcm_sframes_t n = 0;
2413
2414 snd_pcm_stream_lock_irq(substream);
2415 switch (runtime->status->state) {
2416 case SNDRV_PCM_STATE_DRAINING:
2417 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2418 goto __badfd;
2419 case SNDRV_PCM_STATE_RUNNING:
2420 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2421 break;
2422 /* Fall through */
2423 case SNDRV_PCM_STATE_PREPARED:
2424 case SNDRV_PCM_STATE_SUSPENDED:
2425 err = 0;
2426 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2427 n = snd_pcm_playback_hw_avail(runtime);
2428 else
2429 n = snd_pcm_capture_avail(runtime);
2430 n += runtime->delay;
2431 break;
2432 case SNDRV_PCM_STATE_XRUN:
2433 err = -EPIPE;
2434 break;
2435 default:
2436 __badfd:
2437 err = -EBADFD;
2438 break;
2439 }
2440 snd_pcm_stream_unlock_irq(substream);
2441 if (!err)
2442 if (put_user(n, res))
2443 err = -EFAULT;
2444 return err;
2445 }
2446
2447 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2448 struct snd_pcm_sync_ptr __user *_sync_ptr)
2449 {
2450 struct snd_pcm_runtime *runtime = substream->runtime;
2451 struct snd_pcm_sync_ptr sync_ptr;
2452 volatile struct snd_pcm_mmap_status *status;
2453 volatile struct snd_pcm_mmap_control *control;
2454 int err;
2455
2456 memset(&sync_ptr, 0, sizeof(sync_ptr));
2457 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2458 return -EFAULT;
2459 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2460 return -EFAULT;
2461 status = runtime->status;
2462 control = runtime->control;
2463 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2464 err = snd_pcm_hwsync(substream);
2465 if (err < 0)
2466 return err;
2467 }
2468 snd_pcm_stream_lock_irq(substream);
2469 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2470 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2471 else
2472 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2473 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2474 control->avail_min = sync_ptr.c.control.avail_min;
2475 else
2476 sync_ptr.c.control.avail_min = control->avail_min;
2477 sync_ptr.s.status.state = status->state;
2478 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2479 sync_ptr.s.status.tstamp = status->tstamp;
2480 sync_ptr.s.status.suspended_state = status->suspended_state;
2481 snd_pcm_stream_unlock_irq(substream);
2482 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2483 return -EFAULT;
2484 return 0;
2485 }
2486
2487 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2488 {
2489 struct snd_pcm_runtime *runtime = substream->runtime;
2490 int arg;
2491
2492 if (get_user(arg, _arg))
2493 return -EFAULT;
2494 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2495 return -EINVAL;
2496 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2497 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2498 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2499 return 0;
2500 }
2501
2502 static int snd_pcm_common_ioctl1(struct file *file,
2503 struct snd_pcm_substream *substream,
2504 unsigned int cmd, void __user *arg)
2505 {
2506 switch (cmd) {
2507 case SNDRV_PCM_IOCTL_PVERSION:
2508 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2509 case SNDRV_PCM_IOCTL_INFO:
2510 return snd_pcm_info_user(substream, arg);
2511 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2512 return 0;
2513 case SNDRV_PCM_IOCTL_TTSTAMP:
2514 return snd_pcm_tstamp(substream, arg);
2515 case SNDRV_PCM_IOCTL_HW_REFINE:
2516 return snd_pcm_hw_refine_user(substream, arg);
2517 case SNDRV_PCM_IOCTL_HW_PARAMS:
2518 return snd_pcm_hw_params_user(substream, arg);
2519 case SNDRV_PCM_IOCTL_HW_FREE:
2520 return snd_pcm_hw_free(substream);
2521 case SNDRV_PCM_IOCTL_SW_PARAMS:
2522 return snd_pcm_sw_params_user(substream, arg);
2523 case SNDRV_PCM_IOCTL_STATUS:
2524 return snd_pcm_status_user(substream, arg);
2525 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2526 return snd_pcm_channel_info_user(substream, arg);
2527 case SNDRV_PCM_IOCTL_PREPARE:
2528 return snd_pcm_prepare(substream, file);
2529 case SNDRV_PCM_IOCTL_RESET:
2530 return snd_pcm_reset(substream);
2531 case SNDRV_PCM_IOCTL_START:
2532 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2533 case SNDRV_PCM_IOCTL_LINK:
2534 return snd_pcm_link(substream, (int)(unsigned long) arg);
2535 case SNDRV_PCM_IOCTL_UNLINK:
2536 return snd_pcm_unlink(substream);
2537 case SNDRV_PCM_IOCTL_RESUME:
2538 return snd_pcm_resume(substream);
2539 case SNDRV_PCM_IOCTL_XRUN:
2540 return snd_pcm_xrun(substream);
2541 case SNDRV_PCM_IOCTL_HWSYNC:
2542 return snd_pcm_hwsync(substream);
2543 case SNDRV_PCM_IOCTL_DELAY:
2544 return snd_pcm_delay(substream, arg);
2545 case SNDRV_PCM_IOCTL_SYNC_PTR:
2546 return snd_pcm_sync_ptr(substream, arg);
2547 #ifdef CONFIG_SND_SUPPORT_OLD_API
2548 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2549 return snd_pcm_hw_refine_old_user(substream, arg);
2550 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2551 return snd_pcm_hw_params_old_user(substream, arg);
2552 #endif
2553 case SNDRV_PCM_IOCTL_DRAIN:
2554 return snd_pcm_drain(substream, file);
2555 case SNDRV_PCM_IOCTL_DROP:
2556 return snd_pcm_drop(substream);
2557 case SNDRV_PCM_IOCTL_PAUSE:
2558 {
2559 int res;
2560 snd_pcm_stream_lock_irq(substream);
2561 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2562 snd_pcm_stream_unlock_irq(substream);
2563 return res;
2564 }
2565 }
2566 snd_printd("unknown ioctl = 0x%x\n", cmd);
2567 return -ENOTTY;
2568 }
2569
2570 static int snd_pcm_playback_ioctl1(struct file *file,
2571 struct snd_pcm_substream *substream,
2572 unsigned int cmd, void __user *arg)
2573 {
2574 if (snd_BUG_ON(!substream))
2575 return -ENXIO;
2576 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2577 return -EINVAL;
2578 switch (cmd) {
2579 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2580 {
2581 struct snd_xferi xferi;
2582 struct snd_xferi __user *_xferi = arg;
2583 struct snd_pcm_runtime *runtime = substream->runtime;
2584 snd_pcm_sframes_t result;
2585 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2586 return -EBADFD;
2587 if (put_user(0, &_xferi->result))
2588 return -EFAULT;
2589 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2590 return -EFAULT;
2591 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2592 __put_user(result, &_xferi->result);
2593 return result < 0 ? result : 0;
2594 }
2595 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2596 {
2597 struct snd_xfern xfern;
2598 struct snd_xfern __user *_xfern = arg;
2599 struct snd_pcm_runtime *runtime = substream->runtime;
2600 void __user **bufs;
2601 snd_pcm_sframes_t result;
2602 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2603 return -EBADFD;
2604 if (runtime->channels > 128)
2605 return -EINVAL;
2606 if (put_user(0, &_xfern->result))
2607 return -EFAULT;
2608 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2609 return -EFAULT;
2610
2611 bufs = memdup_user(xfern.bufs,
2612 sizeof(void *) * runtime->channels);
2613 if (IS_ERR(bufs))
2614 return PTR_ERR(bufs);
2615 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2616 kfree(bufs);
2617 __put_user(result, &_xfern->result);
2618 return result < 0 ? result : 0;
2619 }
2620 case SNDRV_PCM_IOCTL_REWIND:
2621 {
2622 snd_pcm_uframes_t frames;
2623 snd_pcm_uframes_t __user *_frames = arg;
2624 snd_pcm_sframes_t result;
2625 if (get_user(frames, _frames))
2626 return -EFAULT;
2627 if (put_user(0, _frames))
2628 return -EFAULT;
2629 result = snd_pcm_playback_rewind(substream, frames);
2630 __put_user(result, _frames);
2631 return result < 0 ? result : 0;
2632 }
2633 case SNDRV_PCM_IOCTL_FORWARD:
2634 {
2635 snd_pcm_uframes_t frames;
2636 snd_pcm_uframes_t __user *_frames = arg;
2637 snd_pcm_sframes_t result;
2638 if (get_user(frames, _frames))
2639 return -EFAULT;
2640 if (put_user(0, _frames))
2641 return -EFAULT;
2642 result = snd_pcm_playback_forward(substream, frames);
2643 __put_user(result, _frames);
2644 return result < 0 ? result : 0;
2645 }
2646 }
2647 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2648 }
2649
2650 static int snd_pcm_capture_ioctl1(struct file *file,
2651 struct snd_pcm_substream *substream,
2652 unsigned int cmd, void __user *arg)
2653 {
2654 if (snd_BUG_ON(!substream))
2655 return -ENXIO;
2656 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2657 return -EINVAL;
2658 switch (cmd) {
2659 case SNDRV_PCM_IOCTL_READI_FRAMES:
2660 {
2661 struct snd_xferi xferi;
2662 struct snd_xferi __user *_xferi = arg;
2663 struct snd_pcm_runtime *runtime = substream->runtime;
2664 snd_pcm_sframes_t result;
2665 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2666 return -EBADFD;
2667 if (put_user(0, &_xferi->result))
2668 return -EFAULT;
2669 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2670 return -EFAULT;
2671 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2672 __put_user(result, &_xferi->result);
2673 return result < 0 ? result : 0;
2674 }
2675 case SNDRV_PCM_IOCTL_READN_FRAMES:
2676 {
2677 struct snd_xfern xfern;
2678 struct snd_xfern __user *_xfern = arg;
2679 struct snd_pcm_runtime *runtime = substream->runtime;
2680 void *bufs;
2681 snd_pcm_sframes_t result;
2682 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2683 return -EBADFD;
2684 if (runtime->channels > 128)
2685 return -EINVAL;
2686 if (put_user(0, &_xfern->result))
2687 return -EFAULT;
2688 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2689 return -EFAULT;
2690
2691 bufs = memdup_user(xfern.bufs,
2692 sizeof(void *) * runtime->channels);
2693 if (IS_ERR(bufs))
2694 return PTR_ERR(bufs);
2695 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2696 kfree(bufs);
2697 __put_user(result, &_xfern->result);
2698 return result < 0 ? result : 0;
2699 }
2700 case SNDRV_PCM_IOCTL_REWIND:
2701 {
2702 snd_pcm_uframes_t frames;
2703 snd_pcm_uframes_t __user *_frames = arg;
2704 snd_pcm_sframes_t result;
2705 if (get_user(frames, _frames))
2706 return -EFAULT;
2707 if (put_user(0, _frames))
2708 return -EFAULT;
2709 result = snd_pcm_capture_rewind(substream, frames);
2710 __put_user(result, _frames);
2711 return result < 0 ? result : 0;
2712 }
2713 case SNDRV_PCM_IOCTL_FORWARD:
2714 {
2715 snd_pcm_uframes_t frames;
2716 snd_pcm_uframes_t __user *_frames = arg;
2717 snd_pcm_sframes_t result;
2718 if (get_user(frames, _frames))
2719 return -EFAULT;
2720 if (put_user(0, _frames))
2721 return -EFAULT;
2722 result = snd_pcm_capture_forward(substream, frames);
2723 __put_user(result, _frames);
2724 return result < 0 ? result : 0;
2725 }
2726 }
2727 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2728 }
2729
2730 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2731 unsigned long arg)
2732 {
2733 struct snd_pcm_file *pcm_file;
2734
2735 pcm_file = file->private_data;
2736
2737 if (((cmd >> 8) & 0xff) != 'A')
2738 return -ENOTTY;
2739
2740 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2741 (void __user *)arg);
2742 }
2743
2744 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2745 unsigned long arg)
2746 {
2747 struct snd_pcm_file *pcm_file;
2748
2749 pcm_file = file->private_data;
2750
2751 if (((cmd >> 8) & 0xff) != 'A')
2752 return -ENOTTY;
2753
2754 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2755 (void __user *)arg);
2756 }
2757
2758 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2759 unsigned int cmd, void *arg)
2760 {
2761 mm_segment_t fs;
2762 int result;
2763
2764 fs = snd_enter_user();
2765 switch (substream->stream) {
2766 case SNDRV_PCM_STREAM_PLAYBACK:
2767 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2768 (void __user *)arg);
2769 break;
2770 case SNDRV_PCM_STREAM_CAPTURE:
2771 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2772 (void __user *)arg);
2773 break;
2774 default:
2775 result = -EINVAL;
2776 break;
2777 }
2778 snd_leave_user(fs);
2779 return result;
2780 }
2781
2782 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2783
2784 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2785 loff_t * offset)
2786 {
2787 struct snd_pcm_file *pcm_file;
2788 struct snd_pcm_substream *substream;
2789 struct snd_pcm_runtime *runtime;
2790 snd_pcm_sframes_t result;
2791
2792 pcm_file = file->private_data;
2793 substream = pcm_file->substream;
2794 if (PCM_RUNTIME_CHECK(substream))
2795 return -ENXIO;
2796 runtime = substream->runtime;
2797 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2798 return -EBADFD;
2799 if (!frame_aligned(runtime, count))
2800 return -EINVAL;
2801 count = bytes_to_frames(runtime, count);
2802 result = snd_pcm_lib_read(substream, buf, count);
2803 if (result > 0)
2804 result = frames_to_bytes(runtime, result);
2805 return result;
2806 }
2807
2808 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2809 size_t count, loff_t * offset)
2810 {
2811 struct snd_pcm_file *pcm_file;
2812 struct snd_pcm_substream *substream;
2813 struct snd_pcm_runtime *runtime;
2814 snd_pcm_sframes_t result;
2815
2816 pcm_file = file->private_data;
2817 substream = pcm_file->substream;
2818 if (PCM_RUNTIME_CHECK(substream))
2819 return -ENXIO;
2820 runtime = substream->runtime;
2821 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2822 return -EBADFD;
2823 if (!frame_aligned(runtime, count))
2824 return -EINVAL;
2825 count = bytes_to_frames(runtime, count);
2826 result = snd_pcm_lib_write(substream, buf, count);
2827 if (result > 0)
2828 result = frames_to_bytes(runtime, result);
2829 return result;
2830 }
2831
2832 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2833 unsigned long nr_segs, loff_t pos)
2834
2835 {
2836 struct snd_pcm_file *pcm_file;
2837 struct snd_pcm_substream *substream;
2838 struct snd_pcm_runtime *runtime;
2839 snd_pcm_sframes_t result;
2840 unsigned long i;
2841 void __user **bufs;
2842 snd_pcm_uframes_t frames;
2843
2844 pcm_file = iocb->ki_filp->private_data;
2845 substream = pcm_file->substream;
2846 if (PCM_RUNTIME_CHECK(substream))
2847 return -ENXIO;
2848 runtime = substream->runtime;
2849 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850 return -EBADFD;
2851 if (nr_segs > 1024 || nr_segs != runtime->channels)
2852 return -EINVAL;
2853 if (!frame_aligned(runtime, iov->iov_len))
2854 return -EINVAL;
2855 frames = bytes_to_samples(runtime, iov->iov_len);
2856 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2857 if (bufs == NULL)
2858 return -ENOMEM;
2859 for (i = 0; i < nr_segs; ++i)
2860 bufs[i] = iov[i].iov_base;
2861 result = snd_pcm_lib_readv(substream, bufs, frames);
2862 if (result > 0)
2863 result = frames_to_bytes(runtime, result);
2864 kfree(bufs);
2865 return result;
2866 }
2867
2868 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2869 unsigned long nr_segs, loff_t pos)
2870 {
2871 struct snd_pcm_file *pcm_file;
2872 struct snd_pcm_substream *substream;
2873 struct snd_pcm_runtime *runtime;
2874 snd_pcm_sframes_t result;
2875 unsigned long i;
2876 void __user **bufs;
2877 snd_pcm_uframes_t frames;
2878
2879 pcm_file = iocb->ki_filp->private_data;
2880 substream = pcm_file->substream;
2881 if (PCM_RUNTIME_CHECK(substream))
2882 return -ENXIO;
2883 runtime = substream->runtime;
2884 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2885 return -EBADFD;
2886 if (nr_segs > 128 || nr_segs != runtime->channels ||
2887 !frame_aligned(runtime, iov->iov_len))
2888 return -EINVAL;
2889 frames = bytes_to_samples(runtime, iov->iov_len);
2890 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2891 if (bufs == NULL)
2892 return -ENOMEM;
2893 for (i = 0; i < nr_segs; ++i)
2894 bufs[i] = iov[i].iov_base;
2895 result = snd_pcm_lib_writev(substream, bufs, frames);
2896 if (result > 0)
2897 result = frames_to_bytes(runtime, result);
2898 kfree(bufs);
2899 return result;
2900 }
2901
2902 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2903 {
2904 struct snd_pcm_file *pcm_file;
2905 struct snd_pcm_substream *substream;
2906 struct snd_pcm_runtime *runtime;
2907 unsigned int mask;
2908 snd_pcm_uframes_t avail;
2909
2910 pcm_file = file->private_data;
2911
2912 substream = pcm_file->substream;
2913 if (PCM_RUNTIME_CHECK(substream))
2914 return -ENXIO;
2915 runtime = substream->runtime;
2916
2917 poll_wait(file, &runtime->sleep, wait);
2918
2919 snd_pcm_stream_lock_irq(substream);
2920 avail = snd_pcm_playback_avail(runtime);
2921 switch (runtime->status->state) {
2922 case SNDRV_PCM_STATE_RUNNING:
2923 case SNDRV_PCM_STATE_PREPARED:
2924 case SNDRV_PCM_STATE_PAUSED:
2925 if (avail >= runtime->control->avail_min) {
2926 mask = POLLOUT | POLLWRNORM;
2927 break;
2928 }
2929 /* Fall through */
2930 case SNDRV_PCM_STATE_DRAINING:
2931 mask = 0;
2932 break;
2933 default:
2934 mask = POLLOUT | POLLWRNORM | POLLERR;
2935 break;
2936 }
2937 snd_pcm_stream_unlock_irq(substream);
2938 return mask;
2939 }
2940
2941 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2942 {
2943 struct snd_pcm_file *pcm_file;
2944 struct snd_pcm_substream *substream;
2945 struct snd_pcm_runtime *runtime;
2946 unsigned int mask;
2947 snd_pcm_uframes_t avail;
2948
2949 pcm_file = file->private_data;
2950
2951 substream = pcm_file->substream;
2952 if (PCM_RUNTIME_CHECK(substream))
2953 return -ENXIO;
2954 runtime = substream->runtime;
2955
2956 poll_wait(file, &runtime->sleep, wait);
2957
2958 snd_pcm_stream_lock_irq(substream);
2959 avail = snd_pcm_capture_avail(runtime);
2960 switch (runtime->status->state) {
2961 case SNDRV_PCM_STATE_RUNNING:
2962 case SNDRV_PCM_STATE_PREPARED:
2963 case SNDRV_PCM_STATE_PAUSED:
2964 if (avail >= runtime->control->avail_min) {
2965 mask = POLLIN | POLLRDNORM;
2966 break;
2967 }
2968 mask = 0;
2969 break;
2970 case SNDRV_PCM_STATE_DRAINING:
2971 if (avail > 0) {
2972 mask = POLLIN | POLLRDNORM;
2973 break;
2974 }
2975 /* Fall through */
2976 default:
2977 mask = POLLIN | POLLRDNORM | POLLERR;
2978 break;
2979 }
2980 snd_pcm_stream_unlock_irq(substream);
2981 return mask;
2982 }
2983
2984 /*
2985 * mmap support
2986 */
2987
2988 /*
2989 * Only on coherent architectures, we can mmap the status and the control records
2990 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2991 */
2992 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2993 /*
2994 * mmap status record
2995 */
2996 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2997 struct vm_fault *vmf)
2998 {
2999 struct snd_pcm_substream *substream = area->vm_private_data;
3000 struct snd_pcm_runtime *runtime;
3001
3002 if (substream == NULL)
3003 return VM_FAULT_SIGBUS;
3004 runtime = substream->runtime;
3005 vmf->page = virt_to_page(runtime->status);
3006 get_page(vmf->page);
3007 return 0;
3008 }
3009
3010 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3011 {
3012 .fault = snd_pcm_mmap_status_fault,
3013 };
3014
3015 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3016 struct vm_area_struct *area)
3017 {
3018 long size;
3019 if (!(area->vm_flags & VM_READ))
3020 return -EINVAL;
3021 size = area->vm_end - area->vm_start;
3022 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3023 return -EINVAL;
3024 area->vm_ops = &snd_pcm_vm_ops_status;
3025 area->vm_private_data = substream;
3026 area->vm_flags |= VM_RESERVED;
3027 return 0;
3028 }
3029
3030 /*
3031 * mmap control record
3032 */
3033 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3034 struct vm_fault *vmf)
3035 {
3036 struct snd_pcm_substream *substream = area->vm_private_data;
3037 struct snd_pcm_runtime *runtime;
3038
3039 if (substream == NULL)
3040 return VM_FAULT_SIGBUS;
3041 runtime = substream->runtime;
3042 vmf->page = virt_to_page(runtime->control);
3043 get_page(vmf->page);
3044 return 0;
3045 }
3046
3047 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3048 {
3049 .fault = snd_pcm_mmap_control_fault,
3050 };
3051
3052 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3053 struct vm_area_struct *area)
3054 {
3055 long size;
3056 if (!(area->vm_flags & VM_READ))
3057 return -EINVAL;
3058 size = area->vm_end - area->vm_start;
3059 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3060 return -EINVAL;
3061 area->vm_ops = &snd_pcm_vm_ops_control;
3062 area->vm_private_data = substream;
3063 area->vm_flags |= VM_RESERVED;
3064 return 0;
3065 }
3066 #else /* ! coherent mmap */
3067 /*
3068 * don't support mmap for status and control records.
3069 */
3070 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3071 struct vm_area_struct *area)
3072 {
3073 return -ENXIO;
3074 }
3075 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3076 struct vm_area_struct *area)
3077 {
3078 return -ENXIO;
3079 }
3080 #endif /* coherent mmap */
3081
3082 static inline struct page *
3083 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3084 {
3085 void *vaddr = substream->runtime->dma_area + ofs;
3086 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3087 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3088 return virt_to_page(CAC_ADDR(vaddr));
3089 #endif
3090 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3091 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3092 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3093 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3094 /* assume dma_handle set via pfn_to_phys() in
3095 * mm/dma-noncoherent.c
3096 */
3097 return pfn_to_page(addr >> PAGE_SHIFT);
3098 }
3099 #endif
3100 return virt_to_page(vaddr);
3101 }
3102
3103 /*
3104 * fault callback for mmapping a RAM page
3105 */
3106 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3107 struct vm_fault *vmf)
3108 {
3109 struct snd_pcm_substream *substream = area->vm_private_data;
3110 struct snd_pcm_runtime *runtime;
3111 unsigned long offset;
3112 struct page * page;
3113 size_t dma_bytes;
3114
3115 if (substream == NULL)
3116 return VM_FAULT_SIGBUS;
3117 runtime = substream->runtime;
3118 offset = vmf->pgoff << PAGE_SHIFT;
3119 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3120 if (offset > dma_bytes - PAGE_SIZE)
3121 return VM_FAULT_SIGBUS;
3122 if (substream->ops->page)
3123 page = substream->ops->page(substream, offset);
3124 else
3125 page = snd_pcm_default_page_ops(substream, offset);
3126 if (!page)
3127 return VM_FAULT_SIGBUS;
3128 get_page(page);
3129 vmf->page = page;
3130 return 0;
3131 }
3132
3133 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3134 .open = snd_pcm_mmap_data_open,
3135 .close = snd_pcm_mmap_data_close,
3136 };
3137
3138 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3139 .open = snd_pcm_mmap_data_open,
3140 .close = snd_pcm_mmap_data_close,
3141 .fault = snd_pcm_mmap_data_fault,
3142 };
3143
3144 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3145 /* This should be defined / handled globally! */
3146 #ifdef CONFIG_ARM
3147 #define ARCH_HAS_DMA_MMAP_COHERENT
3148 #endif
3149 #endif
3150
3151 /*
3152 * mmap the DMA buffer on RAM
3153 */
3154 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3155 struct vm_area_struct *area)
3156 {
3157 area->vm_flags |= VM_RESERVED;
3158 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3159 if (!substream->ops->page &&
3160 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3161 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3162 area,
3163 substream->runtime->dma_area,
3164 substream->runtime->dma_addr,
3165 area->vm_end - area->vm_start);
3166 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3167 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3168 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3169 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3170 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3171 /* mmap with fault handler */
3172 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3173 return 0;
3174 }
3175 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3176
3177 /*
3178 * mmap the DMA buffer on I/O memory area
3179 */
3180 #if SNDRV_PCM_INFO_MMAP_IOMEM
3181 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3182 struct vm_area_struct *area)
3183 {
3184 long size;
3185 unsigned long offset;
3186
3187 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3188 area->vm_flags |= VM_IO;
3189 size = area->vm_end - area->vm_start;
3190 offset = area->vm_pgoff << PAGE_SHIFT;
3191 if (io_remap_pfn_range(area, area->vm_start,
3192 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3193 size, area->vm_page_prot))
3194 return -EAGAIN;
3195 return 0;
3196 }
3197
3198 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3199 #endif /* SNDRV_PCM_INFO_MMAP */
3200
3201 /*
3202 * mmap DMA buffer
3203 */
3204 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3205 struct vm_area_struct *area)
3206 {
3207 struct snd_pcm_runtime *runtime;
3208 long size;
3209 unsigned long offset;
3210 size_t dma_bytes;
3211 int err;
3212
3213 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3214 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3215 return -EINVAL;
3216 } else {
3217 if (!(area->vm_flags & VM_READ))
3218 return -EINVAL;
3219 }
3220 runtime = substream->runtime;
3221 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3222 return -EBADFD;
3223 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3224 return -ENXIO;
3225 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3226 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3227 return -EINVAL;
3228 size = area->vm_end - area->vm_start;
3229 offset = area->vm_pgoff << PAGE_SHIFT;
3230 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3231 if ((size_t)size > dma_bytes)
3232 return -EINVAL;
3233 if (offset > dma_bytes - size)
3234 return -EINVAL;
3235
3236 area->vm_ops = &snd_pcm_vm_ops_data;
3237 area->vm_private_data = substream;
3238 if (substream->ops->mmap)
3239 err = substream->ops->mmap(substream, area);
3240 else
3241 err = snd_pcm_lib_default_mmap(substream, area);
3242 if (!err)
3243 atomic_inc(&substream->mmap_count);
3244 return err;
3245 }
3246
3247 EXPORT_SYMBOL(snd_pcm_mmap_data);
3248
3249 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3250 {
3251 struct snd_pcm_file * pcm_file;
3252 struct snd_pcm_substream *substream;
3253 unsigned long offset;
3254
3255 pcm_file = file->private_data;
3256 substream = pcm_file->substream;
3257 if (PCM_RUNTIME_CHECK(substream))
3258 return -ENXIO;
3259
3260 offset = area->vm_pgoff << PAGE_SHIFT;
3261 switch (offset) {
3262 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3263 if (pcm_file->no_compat_mmap)
3264 return -ENXIO;
3265 return snd_pcm_mmap_status(substream, file, area);
3266 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3267 if (pcm_file->no_compat_mmap)
3268 return -ENXIO;
3269 return snd_pcm_mmap_control(substream, file, area);
3270 default:
3271 return snd_pcm_mmap_data(substream, file, area);
3272 }
3273 return 0;
3274 }
3275
3276 static int snd_pcm_fasync(int fd, struct file * file, int on)
3277 {
3278 struct snd_pcm_file * pcm_file;
3279 struct snd_pcm_substream *substream;
3280 struct snd_pcm_runtime *runtime;
3281
3282 pcm_file = file->private_data;
3283 substream = pcm_file->substream;
3284 if (PCM_RUNTIME_CHECK(substream))
3285 return -ENXIO;
3286 runtime = substream->runtime;
3287 return fasync_helper(fd, file, on, &runtime->fasync);
3288 }
3289
3290 /*
3291 * ioctl32 compat
3292 */
3293 #ifdef CONFIG_COMPAT
3294 #include "pcm_compat.c"
3295 #else
3296 #define snd_pcm_ioctl_compat NULL
3297 #endif
3298
3299 /*
3300 * To be removed helpers to keep binary compatibility
3301 */
3302
3303 #ifdef CONFIG_SND_SUPPORT_OLD_API
3304 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3305 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3306
3307 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3308 struct snd_pcm_hw_params_old *oparams)
3309 {
3310 unsigned int i;
3311
3312 memset(params, 0, sizeof(*params));
3313 params->flags = oparams->flags;
3314 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3315 params->masks[i].bits[0] = oparams->masks[i];
3316 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3317 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3318 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3319 params->info = oparams->info;
3320 params->msbits = oparams->msbits;
3321 params->rate_num = oparams->rate_num;
3322 params->rate_den = oparams->rate_den;
3323 params->fifo_size = oparams->fifo_size;
3324 }
3325
3326 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3327 struct snd_pcm_hw_params *params)
3328 {
3329 unsigned int i;
3330
3331 memset(oparams, 0, sizeof(*oparams));
3332 oparams->flags = params->flags;
3333 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3334 oparams->masks[i] = params->masks[i].bits[0];
3335 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3336 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3337 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3338 oparams->info = params->info;
3339 oparams->msbits = params->msbits;
3340 oparams->rate_num = params->rate_num;
3341 oparams->rate_den = params->rate_den;
3342 oparams->fifo_size = params->fifo_size;
3343 }
3344
3345 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3346 struct snd_pcm_hw_params_old __user * _oparams)
3347 {
3348 struct snd_pcm_hw_params *params;
3349 struct snd_pcm_hw_params_old *oparams = NULL;
3350 int err;
3351
3352 params = kmalloc(sizeof(*params), GFP_KERNEL);
3353 if (!params)
3354 return -ENOMEM;
3355
3356 oparams = memdup_user(_oparams, sizeof(*oparams));
3357 if (IS_ERR(oparams)) {
3358 err = PTR_ERR(oparams);
3359 goto out;
3360 }
3361 snd_pcm_hw_convert_from_old_params(params, oparams);
3362 err = snd_pcm_hw_refine(substream, params);
3363 snd_pcm_hw_convert_to_old_params(oparams, params);
3364 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3365 if (!err)
3366 err = -EFAULT;
3367 }
3368
3369 kfree(oparams);
3370 out:
3371 kfree(params);
3372 return err;
3373 }
3374
3375 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3376 struct snd_pcm_hw_params_old __user * _oparams)
3377 {
3378 struct snd_pcm_hw_params *params;
3379 struct snd_pcm_hw_params_old *oparams = NULL;
3380 int err;
3381
3382 params = kmalloc(sizeof(*params), GFP_KERNEL);
3383 if (!params)
3384 return -ENOMEM;
3385
3386 oparams = memdup_user(_oparams, sizeof(*oparams));
3387 if (IS_ERR(oparams)) {
3388 err = PTR_ERR(oparams);
3389 goto out;
3390 }
3391 snd_pcm_hw_convert_from_old_params(params, oparams);
3392 err = snd_pcm_hw_params(substream, params);
3393 snd_pcm_hw_convert_to_old_params(oparams, params);
3394 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3395 if (!err)
3396 err = -EFAULT;
3397 }
3398
3399 kfree(oparams);
3400 out:
3401 kfree(params);
3402 return err;
3403 }
3404 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3405
3406 #ifndef CONFIG_MMU
3407 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3408 unsigned long addr,
3409 unsigned long len,
3410 unsigned long pgoff,
3411 unsigned long flags)
3412 {
3413 struct snd_pcm_file *pcm_file = file->private_data;
3414 struct snd_pcm_substream *substream = pcm_file->substream;
3415 struct snd_pcm_runtime *runtime = substream->runtime;
3416 unsigned long offset = pgoff << PAGE_SHIFT;
3417
3418 switch (offset) {
3419 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3420 return (unsigned long)runtime->status;
3421 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3422 return (unsigned long)runtime->control;
3423 default:
3424 return (unsigned long)runtime->dma_area + offset;
3425 }
3426 }
3427 #else
3428 # define snd_pcm_get_unmapped_area NULL
3429 #endif
3430
3431 /*
3432 * Register section
3433 */
3434
3435 const struct file_operations snd_pcm_f_ops[2] = {
3436 {
3437 .owner = THIS_MODULE,
3438 .write = snd_pcm_write,
3439 .aio_write = snd_pcm_aio_write,
3440 .open = snd_pcm_playback_open,
3441 .release = snd_pcm_release,
3442 .llseek = no_llseek,
3443 .poll = snd_pcm_playback_poll,
3444 .unlocked_ioctl = snd_pcm_playback_ioctl,
3445 .compat_ioctl = snd_pcm_ioctl_compat,
3446 .mmap = snd_pcm_mmap,
3447 .fasync = snd_pcm_fasync,
3448 .get_unmapped_area = snd_pcm_get_unmapped_area,
3449 },
3450 {
3451 .owner = THIS_MODULE,
3452 .read = snd_pcm_read,
3453 .aio_read = snd_pcm_aio_read,
3454 .open = snd_pcm_capture_open,
3455 .release = snd_pcm_release,
3456 .llseek = no_llseek,
3457 .poll = snd_pcm_capture_poll,
3458 .unlocked_ioctl = snd_pcm_capture_ioctl,
3459 .compat_ioctl = snd_pcm_ioctl_compat,
3460 .mmap = snd_pcm_mmap,
3461 .fasync = snd_pcm_fasync,
3462 .get_unmapped_area = snd_pcm_get_unmapped_area,
3463 }
3464 };