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[ALSA] Add O_APPEND flag support to PCM
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / core / pcm_native.c
blob36d6765618a4c489bae9e368ec8c86d5be3f1c4b
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <sound/driver.h>
23 #include <linux/mm.h>
24 #include <linux/smp_lock.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
36 #include <asm/io.h>
37
38 /*
39 * Compatibility
40 */
41
42 struct snd_pcm_hw_params_old {
43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
54 snd_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56 };
57
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
61
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66 #endif
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69 /*
70 *
71 */
72
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
75
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
77
78 static inline mm_segment_t snd_enter_user(void)
79 {
80 mm_segment_t fs = get_fs();
81 set_fs(get_ds());
82 return fs;
83 }
84
85 static inline void snd_leave_user(mm_segment_t fs)
86 {
87 set_fs(fs);
88 }
89
90
91
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
93 {
94 struct snd_pcm_runtime *runtime;
95 struct snd_pcm *pcm = substream->pcm;
96 struct snd_pcm_str *pstr = substream->pstr;
97
98 snd_assert(substream != NULL, return -ENXIO);
99 memset(info, 0, sizeof(*info));
100 info->card = pcm->card->number;
101 info->device = pcm->device;
102 info->stream = substream->stream;
103 info->subdevice = substream->number;
104 strlcpy(info->id, pcm->id, sizeof(info->id));
105 strlcpy(info->name, pcm->name, sizeof(info->name));
106 info->dev_class = pcm->dev_class;
107 info->dev_subclass = pcm->dev_subclass;
108 info->subdevices_count = pstr->substream_count;
109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110 strlcpy(info->subname, substream->name, sizeof(info->subname));
111 runtime = substream->runtime;
112 /* AB: FIXME!!! This is definitely nonsense */
113 if (runtime) {
114 info->sync = runtime->sync;
115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116 }
117 return 0;
118 }
119
120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
121 struct snd_pcm_info __user * _info)
122 {
123 struct snd_pcm_info *info;
124 int err;
125
126 info = kmalloc(sizeof(*info), GFP_KERNEL);
127 if (! info)
128 return -ENOMEM;
129 err = snd_pcm_info(substream, info);
130 if (err >= 0) {
131 if (copy_to_user(_info, info, sizeof(*info)))
132 err = -EFAULT;
133 }
134 kfree(info);
135 return err;
136 }
137
138 #undef RULES_DEBUG
139
140 #ifdef RULES_DEBUG
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names[] = {
143 HW_PARAM(ACCESS),
144 HW_PARAM(FORMAT),
145 HW_PARAM(SUBFORMAT),
146 HW_PARAM(SAMPLE_BITS),
147 HW_PARAM(FRAME_BITS),
148 HW_PARAM(CHANNELS),
149 HW_PARAM(RATE),
150 HW_PARAM(PERIOD_TIME),
151 HW_PARAM(PERIOD_SIZE),
152 HW_PARAM(PERIOD_BYTES),
153 HW_PARAM(PERIODS),
154 HW_PARAM(BUFFER_TIME),
155 HW_PARAM(BUFFER_SIZE),
156 HW_PARAM(BUFFER_BYTES),
157 HW_PARAM(TICK_TIME),
158 };
159 #endif
160
161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params)
163 {
164 unsigned int k;
165 struct snd_pcm_hardware *hw;
166 struct snd_interval *i = NULL;
167 struct snd_mask *m = NULL;
168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
169 unsigned int rstamps[constrs->rules_num];
170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171 unsigned int stamp = 2;
172 int changed, again;
173
174 params->info = 0;
175 params->fifo_size = 0;
176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177 params->msbits = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179 params->rate_num = 0;
180 params->rate_den = 0;
181 }
182
183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184 m = hw_param_mask(params, k);
185 if (snd_mask_empty(m))
186 return -EINVAL;
187 if (!(params->rmask & (1 << k)))
188 continue;
189 #ifdef RULES_DEBUG
190 printk("%s = ", snd_pcm_hw_param_names[k]);
191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192 #endif
193 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194 #ifdef RULES_DEBUG
195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 #endif
197 if (changed)
198 params->cmask |= 1 << k;
199 if (changed < 0)
200 return changed;
201 }
202
203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204 i = hw_param_interval(params, k);
205 if (snd_interval_empty(i))
206 return -EINVAL;
207 if (!(params->rmask & (1 << k)))
208 continue;
209 #ifdef RULES_DEBUG
210 printk("%s = ", snd_pcm_hw_param_names[k]);
211 if (i->empty)
212 printk("empty");
213 else
214 printk("%c%u %u%c",
215 i->openmin ? '(' : '[', i->min,
216 i->max, i->openmax ? ')' : ']');
217 printk(" -> ");
218 #endif
219 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220 #ifdef RULES_DEBUG
221 if (i->empty)
222 printk("empty\n");
223 else
224 printk("%c%u %u%c\n",
225 i->openmin ? '(' : '[', i->min,
226 i->max, i->openmax ? ')' : ']');
227 #endif
228 if (changed)
229 params->cmask |= 1 << k;
230 if (changed < 0)
231 return changed;
232 }
233
234 for (k = 0; k < constrs->rules_num; k++)
235 rstamps[k] = 0;
236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238 do {
239 again = 0;
240 for (k = 0; k < constrs->rules_num; k++) {
241 struct snd_pcm_hw_rule *r = &constrs->rules[k];
242 unsigned int d;
243 int doit = 0;
244 if (r->cond && !(r->cond & params->flags))
245 continue;
246 for (d = 0; r->deps[d] >= 0; d++) {
247 if (vstamps[r->deps[d]] > rstamps[k]) {
248 doit = 1;
249 break;
250 }
251 }
252 if (!doit)
253 continue;
254 #ifdef RULES_DEBUG
255 printk("Rule %d [%p]: ", k, r->func);
256 if (r->var >= 0) {
257 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258 if (hw_is_mask(r->var)) {
259 m = hw_param_mask(params, r->var);
260 printk("%x", *m->bits);
261 } else {
262 i = hw_param_interval(params, r->var);
263 if (i->empty)
264 printk("empty");
265 else
266 printk("%c%u %u%c",
267 i->openmin ? '(' : '[', i->min,
268 i->max, i->openmax ? ')' : ']');
269 }
270 }
271 #endif
272 changed = r->func(params, r);
273 #ifdef RULES_DEBUG
274 if (r->var >= 0) {
275 printk(" -> ");
276 if (hw_is_mask(r->var))
277 printk("%x", *m->bits);
278 else {
279 if (i->empty)
280 printk("empty");
281 else
282 printk("%c%u %u%c",
283 i->openmin ? '(' : '[', i->min,
284 i->max, i->openmax ? ')' : ']');
285 }
286 }
287 printk("\n");
288 #endif
289 rstamps[k] = stamp;
290 if (changed && r->var >= 0) {
291 params->cmask |= (1 << r->var);
292 vstamps[r->var] = stamp;
293 again = 1;
294 }
295 if (changed < 0)
296 return changed;
297 stamp++;
298 }
299 } while (again);
300 if (!params->msbits) {
301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302 if (snd_interval_single(i))
303 params->msbits = snd_interval_value(i);
304 }
305
306 if (!params->rate_den) {
307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308 if (snd_interval_single(i)) {
309 params->rate_num = snd_interval_value(i);
310 params->rate_den = 1;
311 }
312 }
313
314 hw = &substream->runtime->hw;
315 if (!params->info)
316 params->info = hw->info;
317 if (!params->fifo_size)
318 params->fifo_size = hw->fifo_size;
319 params->rmask = 0;
320 return 0;
321 }
322
323 EXPORT_SYMBOL(snd_pcm_hw_refine);
324
325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
326 struct snd_pcm_hw_params __user * _params)
327 {
328 struct snd_pcm_hw_params *params;
329 int err;
330
331 params = kmalloc(sizeof(*params), GFP_KERNEL);
332 if (!params) {
333 err = -ENOMEM;
334 goto out;
335 }
336 if (copy_from_user(params, _params, sizeof(*params))) {
337 err = -EFAULT;
338 goto out;
339 }
340 err = snd_pcm_hw_refine(substream, params);
341 if (copy_to_user(_params, params, sizeof(*params))) {
342 if (!err)
343 err = -EFAULT;
344 }
345 out:
346 kfree(params);
347 return err;
348 }
349
350 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
351 struct snd_pcm_hw_params *params)
352 {
353 struct snd_pcm_runtime *runtime;
354 int err;
355 unsigned int bits;
356 snd_pcm_uframes_t frames;
357
358 snd_assert(substream != NULL, return -ENXIO);
359 runtime = substream->runtime;
360 snd_assert(runtime != NULL, return -ENXIO);
361 snd_pcm_stream_lock_irq(substream);
362 switch (runtime->status->state) {
363 case SNDRV_PCM_STATE_OPEN:
364 case SNDRV_PCM_STATE_SETUP:
365 case SNDRV_PCM_STATE_PREPARED:
366 break;
367 default:
368 snd_pcm_stream_unlock_irq(substream);
369 return -EBADFD;
370 }
371 snd_pcm_stream_unlock_irq(substream);
372 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
373 if (!substream->oss.oss)
374 #endif
375 if (atomic_read(&runtime->mmap_count))
376 return -EBADFD;
377
378 params->rmask = ~0U;
379 err = snd_pcm_hw_refine(substream, params);
380 if (err < 0)
381 goto _error;
382
383 err = snd_pcm_hw_params_choose(substream, params);
384 if (err < 0)
385 goto _error;
386
387 if (substream->ops->hw_params != NULL) {
388 err = substream->ops->hw_params(substream, params);
389 if (err < 0)
390 goto _error;
391 }
392
393 runtime->access = params_access(params);
394 runtime->format = params_format(params);
395 runtime->subformat = params_subformat(params);
396 runtime->channels = params_channels(params);
397 runtime->rate = params_rate(params);
398 runtime->period_size = params_period_size(params);
399 runtime->periods = params_periods(params);
400 runtime->buffer_size = params_buffer_size(params);
401 runtime->tick_time = params_tick_time(params);
402 runtime->info = params->info;
403 runtime->rate_num = params->rate_num;
404 runtime->rate_den = params->rate_den;
405
406 bits = snd_pcm_format_physical_width(runtime->format);
407 runtime->sample_bits = bits;
408 bits *= runtime->channels;
409 runtime->frame_bits = bits;
410 frames = 1;
411 while (bits % 8 != 0) {
412 bits *= 2;
413 frames *= 2;
414 }
415 runtime->byte_align = bits / 8;
416 runtime->min_align = frames;
417
418 /* Default sw params */
419 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
420 runtime->period_step = 1;
421 runtime->sleep_min = 0;
422 runtime->control->avail_min = runtime->period_size;
423 runtime->xfer_align = runtime->period_size;
424 runtime->start_threshold = 1;
425 runtime->stop_threshold = runtime->buffer_size;
426 runtime->silence_threshold = 0;
427 runtime->silence_size = 0;
428 runtime->boundary = runtime->buffer_size;
429 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
430 runtime->boundary *= 2;
431
432 snd_pcm_timer_resolution_change(substream);
433 runtime->status->state = SNDRV_PCM_STATE_SETUP;
434 return 0;
435 _error:
436 /* hardware might be unuseable from this time,
437 so we force application to retry to set
438 the correct hardware parameter settings */
439 runtime->status->state = SNDRV_PCM_STATE_OPEN;
440 if (substream->ops->hw_free != NULL)
441 substream->ops->hw_free(substream);
442 return err;
443 }
444
445 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
446 struct snd_pcm_hw_params __user * _params)
447 {
448 struct snd_pcm_hw_params *params;
449 int err;
450
451 params = kmalloc(sizeof(*params), GFP_KERNEL);
452 if (!params) {
453 err = -ENOMEM;
454 goto out;
455 }
456 if (copy_from_user(params, _params, sizeof(*params))) {
457 err = -EFAULT;
458 goto out;
459 }
460 err = snd_pcm_hw_params(substream, params);
461 if (copy_to_user(_params, params, sizeof(*params))) {
462 if (!err)
463 err = -EFAULT;
464 }
465 out:
466 kfree(params);
467 return err;
468 }
469
470 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
471 {
472 struct snd_pcm_runtime *runtime;
473 int result = 0;
474
475 snd_assert(substream != NULL, return -ENXIO);
476 runtime = substream->runtime;
477 snd_assert(runtime != NULL, return -ENXIO);
478 snd_pcm_stream_lock_irq(substream);
479 switch (runtime->status->state) {
480 case SNDRV_PCM_STATE_SETUP:
481 case SNDRV_PCM_STATE_PREPARED:
482 break;
483 default:
484 snd_pcm_stream_unlock_irq(substream);
485 return -EBADFD;
486 }
487 snd_pcm_stream_unlock_irq(substream);
488 if (atomic_read(&runtime->mmap_count))
489 return -EBADFD;
490 if (substream->ops->hw_free)
491 result = substream->ops->hw_free(substream);
492 runtime->status->state = SNDRV_PCM_STATE_OPEN;
493 return result;
494 }
495
496 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
497 struct snd_pcm_sw_params *params)
498 {
499 struct snd_pcm_runtime *runtime;
500
501 snd_assert(substream != NULL, return -ENXIO);
502 runtime = substream->runtime;
503 snd_assert(runtime != NULL, return -ENXIO);
504 snd_pcm_stream_lock_irq(substream);
505 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
506 snd_pcm_stream_unlock_irq(substream);
507 return -EBADFD;
508 }
509 snd_pcm_stream_unlock_irq(substream);
510
511 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
512 return -EINVAL;
513 if (params->avail_min == 0)
514 return -EINVAL;
515 if (params->xfer_align == 0 ||
516 params->xfer_align % runtime->min_align != 0)
517 return -EINVAL;
518 if (params->silence_size >= runtime->boundary) {
519 if (params->silence_threshold != 0)
520 return -EINVAL;
521 } else {
522 if (params->silence_size > params->silence_threshold)
523 return -EINVAL;
524 if (params->silence_threshold > runtime->buffer_size)
525 return -EINVAL;
526 }
527 snd_pcm_stream_lock_irq(substream);
528 runtime->tstamp_mode = params->tstamp_mode;
529 runtime->sleep_min = params->sleep_min;
530 runtime->period_step = params->period_step;
531 runtime->control->avail_min = params->avail_min;
532 runtime->start_threshold = params->start_threshold;
533 runtime->stop_threshold = params->stop_threshold;
534 runtime->silence_threshold = params->silence_threshold;
535 runtime->silence_size = params->silence_size;
536 runtime->xfer_align = params->xfer_align;
537 params->boundary = runtime->boundary;
538 if (snd_pcm_running(substream)) {
539 if (runtime->sleep_min)
540 snd_pcm_tick_prepare(substream);
541 else
542 snd_pcm_tick_set(substream, 0);
543 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
544 runtime->silence_size > 0)
545 snd_pcm_playback_silence(substream, ULONG_MAX);
546 wake_up(&runtime->sleep);
547 }
548 snd_pcm_stream_unlock_irq(substream);
549 return 0;
550 }
551
552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
553 struct snd_pcm_sw_params __user * _params)
554 {
555 struct snd_pcm_sw_params params;
556 int err;
557 if (copy_from_user(&params, _params, sizeof(params)))
558 return -EFAULT;
559 err = snd_pcm_sw_params(substream, &params);
560 if (copy_to_user(_params, &params, sizeof(params)))
561 return -EFAULT;
562 return err;
563 }
564
565 int snd_pcm_status(struct snd_pcm_substream *substream,
566 struct snd_pcm_status *status)
567 {
568 struct snd_pcm_runtime *runtime = substream->runtime;
569
570 snd_pcm_stream_lock_irq(substream);
571 status->state = runtime->status->state;
572 status->suspended_state = runtime->status->suspended_state;
573 if (status->state == SNDRV_PCM_STATE_OPEN)
574 goto _end;
575 status->trigger_tstamp = runtime->trigger_tstamp;
576 if (snd_pcm_running(substream)) {
577 snd_pcm_update_hw_ptr(substream);
578 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
579 status->tstamp = runtime->status->tstamp;
580 else
581 getnstimeofday(&status->tstamp);
582 } else
583 getnstimeofday(&status->tstamp);
584 status->appl_ptr = runtime->control->appl_ptr;
585 status->hw_ptr = runtime->status->hw_ptr;
586 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
587 status->avail = snd_pcm_playback_avail(runtime);
588 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
589 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
590 status->delay = runtime->buffer_size - status->avail;
591 else
592 status->delay = 0;
593 } else {
594 status->avail = snd_pcm_capture_avail(runtime);
595 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
596 status->delay = status->avail;
597 else
598 status->delay = 0;
599 }
600 status->avail_max = runtime->avail_max;
601 status->overrange = runtime->overrange;
602 runtime->avail_max = 0;
603 runtime->overrange = 0;
604 _end:
605 snd_pcm_stream_unlock_irq(substream);
606 return 0;
607 }
608
609 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
610 struct snd_pcm_status __user * _status)
611 {
612 struct snd_pcm_status status;
613 struct snd_pcm_runtime *runtime;
614 int res;
615
616 snd_assert(substream != NULL, return -ENXIO);
617 runtime = substream->runtime;
618 memset(&status, 0, sizeof(status));
619 res = snd_pcm_status(substream, &status);
620 if (res < 0)
621 return res;
622 if (copy_to_user(_status, &status, sizeof(status)))
623 return -EFAULT;
624 return 0;
625 }
626
627 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
628 struct snd_pcm_channel_info * info)
629 {
630 struct snd_pcm_runtime *runtime;
631 unsigned int channel;
632
633 snd_assert(substream != NULL, return -ENXIO);
634 channel = info->channel;
635 runtime = substream->runtime;
636 snd_pcm_stream_lock_irq(substream);
637 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
638 snd_pcm_stream_unlock_irq(substream);
639 return -EBADFD;
640 }
641 snd_pcm_stream_unlock_irq(substream);
642 if (channel >= runtime->channels)
643 return -EINVAL;
644 memset(info, 0, sizeof(*info));
645 info->channel = channel;
646 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
647 }
648
649 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
650 struct snd_pcm_channel_info __user * _info)
651 {
652 struct snd_pcm_channel_info info;
653 int res;
654
655 if (copy_from_user(&info, _info, sizeof(info)))
656 return -EFAULT;
657 res = snd_pcm_channel_info(substream, &info);
658 if (res < 0)
659 return res;
660 if (copy_to_user(_info, &info, sizeof(info)))
661 return -EFAULT;
662 return 0;
663 }
664
665 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
666 {
667 struct snd_pcm_runtime *runtime = substream->runtime;
668 if (runtime->trigger_master == NULL)
669 return;
670 if (runtime->trigger_master == substream) {
671 getnstimeofday(&runtime->trigger_tstamp);
672 } else {
673 snd_pcm_trigger_tstamp(runtime->trigger_master);
674 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
675 }
676 runtime->trigger_master = NULL;
677 }
678
679 struct action_ops {
680 int (*pre_action)(struct snd_pcm_substream *substream, int state);
681 int (*do_action)(struct snd_pcm_substream *substream, int state);
682 void (*undo_action)(struct snd_pcm_substream *substream, int state);
683 void (*post_action)(struct snd_pcm_substream *substream, int state);
684 };
685
686 /*
687 * this functions is core for handling of linked stream
688 * Note: the stream state might be changed also on failure
689 * Note2: call with calling stream lock + link lock
690 */
691 static int snd_pcm_action_group(struct action_ops *ops,
692 struct snd_pcm_substream *substream,
693 int state, int do_lock)
694 {
695 struct list_head *pos;
696 struct snd_pcm_substream *s = NULL;
697 struct snd_pcm_substream *s1;
698 int res = 0;
699
700 snd_pcm_group_for_each(pos, substream) {
701 s = snd_pcm_group_substream_entry(pos);
702 if (do_lock && s != substream)
703 spin_lock(&s->self_group.lock);
704 res = ops->pre_action(s, state);
705 if (res < 0)
706 goto _unlock;
707 }
708 snd_pcm_group_for_each(pos, substream) {
709 s = snd_pcm_group_substream_entry(pos);
710 res = ops->do_action(s, state);
711 if (res < 0) {
712 if (ops->undo_action) {
713 snd_pcm_group_for_each(pos, substream) {
714 s1 = snd_pcm_group_substream_entry(pos);
715 if (s1 == s) /* failed stream */
716 break;
717 ops->undo_action(s1, state);
718 }
719 }
720 s = NULL; /* unlock all */
721 goto _unlock;
722 }
723 }
724 snd_pcm_group_for_each(pos, substream) {
725 s = snd_pcm_group_substream_entry(pos);
726 ops->post_action(s, state);
727 }
728 _unlock:
729 if (do_lock) {
730 /* unlock streams */
731 snd_pcm_group_for_each(pos, substream) {
732 s1 = snd_pcm_group_substream_entry(pos);
733 if (s1 != substream)
734 spin_unlock(&s1->self_group.lock);
735 if (s1 == s) /* end */
736 break;
737 }
738 }
739 return res;
740 }
741
742 /*
743 * Note: call with stream lock
744 */
745 static int snd_pcm_action_single(struct action_ops *ops,
746 struct snd_pcm_substream *substream,
747 int state)
748 {
749 int res;
750
751 res = ops->pre_action(substream, state);
752 if (res < 0)
753 return res;
754 res = ops->do_action(substream, state);
755 if (res == 0)
756 ops->post_action(substream, state);
757 else if (ops->undo_action)
758 ops->undo_action(substream, state);
759 return res;
760 }
761
762 /*
763 * Note: call with stream lock
764 */
765 static int snd_pcm_action(struct action_ops *ops,
766 struct snd_pcm_substream *substream,
767 int state)
768 {
769 int res;
770
771 if (snd_pcm_stream_linked(substream)) {
772 if (!spin_trylock(&substream->group->lock)) {
773 spin_unlock(&substream->self_group.lock);
774 spin_lock(&substream->group->lock);
775 spin_lock(&substream->self_group.lock);
776 }
777 res = snd_pcm_action_group(ops, substream, state, 1);
778 spin_unlock(&substream->group->lock);
779 } else {
780 res = snd_pcm_action_single(ops, substream, state);
781 }
782 return res;
783 }
784
785 /*
786 * Note: don't use any locks before
787 */
788 static int snd_pcm_action_lock_irq(struct action_ops *ops,
789 struct snd_pcm_substream *substream,
790 int state)
791 {
792 int res;
793
794 read_lock_irq(&snd_pcm_link_rwlock);
795 if (snd_pcm_stream_linked(substream)) {
796 spin_lock(&substream->group->lock);
797 spin_lock(&substream->self_group.lock);
798 res = snd_pcm_action_group(ops, substream, state, 1);
799 spin_unlock(&substream->self_group.lock);
800 spin_unlock(&substream->group->lock);
801 } else {
802 spin_lock(&substream->self_group.lock);
803 res = snd_pcm_action_single(ops, substream, state);
804 spin_unlock(&substream->self_group.lock);
805 }
806 read_unlock_irq(&snd_pcm_link_rwlock);
807 return res;
808 }
809
810 /*
811 */
812 static int snd_pcm_action_nonatomic(struct action_ops *ops,
813 struct snd_pcm_substream *substream,
814 int state)
815 {
816 int res;
817
818 down_read(&snd_pcm_link_rwsem);
819 if (snd_pcm_stream_linked(substream))
820 res = snd_pcm_action_group(ops, substream, state, 0);
821 else
822 res = snd_pcm_action_single(ops, substream, state);
823 up_read(&snd_pcm_link_rwsem);
824 return res;
825 }
826
827 /*
828 * start callbacks
829 */
830 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
831 {
832 struct snd_pcm_runtime *runtime = substream->runtime;
833 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
834 return -EBADFD;
835 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
836 !snd_pcm_playback_data(substream))
837 return -EPIPE;
838 runtime->trigger_master = substream;
839 return 0;
840 }
841
842 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
843 {
844 if (substream->runtime->trigger_master != substream)
845 return 0;
846 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
847 }
848
849 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
850 {
851 if (substream->runtime->trigger_master == substream)
852 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
853 }
854
855 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
856 {
857 struct snd_pcm_runtime *runtime = substream->runtime;
858 snd_pcm_trigger_tstamp(substream);
859 runtime->status->state = state;
860 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
861 runtime->silence_size > 0)
862 snd_pcm_playback_silence(substream, ULONG_MAX);
863 if (runtime->sleep_min)
864 snd_pcm_tick_prepare(substream);
865 if (substream->timer)
866 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
867 &runtime->trigger_tstamp);
868 }
869
870 static struct action_ops snd_pcm_action_start = {
871 .pre_action = snd_pcm_pre_start,
872 .do_action = snd_pcm_do_start,
873 .undo_action = snd_pcm_undo_start,
874 .post_action = snd_pcm_post_start
875 };
876
877 /**
878 * snd_pcm_start
879 * @substream: the PCM substream instance
880 *
881 * Start all linked streams.
882 */
883 int snd_pcm_start(struct snd_pcm_substream *substream)
884 {
885 return snd_pcm_action(&snd_pcm_action_start, substream,
886 SNDRV_PCM_STATE_RUNNING);
887 }
888
889 /*
890 * stop callbacks
891 */
892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
893 {
894 struct snd_pcm_runtime *runtime = substream->runtime;
895 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
896 return -EBADFD;
897 runtime->trigger_master = substream;
898 return 0;
899 }
900
901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
902 {
903 if (substream->runtime->trigger_master == substream &&
904 snd_pcm_running(substream))
905 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
906 return 0; /* unconditonally stop all substreams */
907 }
908
909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
910 {
911 struct snd_pcm_runtime *runtime = substream->runtime;
912 if (runtime->status->state != state) {
913 snd_pcm_trigger_tstamp(substream);
914 if (substream->timer)
915 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
916 &runtime->trigger_tstamp);
917 runtime->status->state = state;
918 snd_pcm_tick_set(substream, 0);
919 }
920 wake_up(&runtime->sleep);
921 }
922
923 static struct action_ops snd_pcm_action_stop = {
924 .pre_action = snd_pcm_pre_stop,
925 .do_action = snd_pcm_do_stop,
926 .post_action = snd_pcm_post_stop
927 };
928
929 /**
930 * snd_pcm_stop
931 * @substream: the PCM substream instance
932 * @state: PCM state after stopping the stream
933 *
934 * Try to stop all running streams in the substream group.
935 * The state of each stream is changed to the given value after that unconditionally.
936 */
937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
938 {
939 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
940 }
941
942 EXPORT_SYMBOL(snd_pcm_stop);
943
944 /**
945 * snd_pcm_drain_done
946 * @substream: the PCM substream
947 *
948 * Stop the DMA only when the given stream is playback.
949 * The state is changed to SETUP.
950 * Unlike snd_pcm_stop(), this affects only the given stream.
951 */
952 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
953 {
954 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
955 SNDRV_PCM_STATE_SETUP);
956 }
957
958 /*
959 * pause callbacks
960 */
961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
962 {
963 struct snd_pcm_runtime *runtime = substream->runtime;
964 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
965 return -ENOSYS;
966 if (push) {
967 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
968 return -EBADFD;
969 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
970 return -EBADFD;
971 runtime->trigger_master = substream;
972 return 0;
973 }
974
975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
976 {
977 if (substream->runtime->trigger_master != substream)
978 return 0;
979 return substream->ops->trigger(substream,
980 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
981 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
982 }
983
984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
985 {
986 if (substream->runtime->trigger_master == substream)
987 substream->ops->trigger(substream,
988 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
989 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
990 }
991
992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
993 {
994 struct snd_pcm_runtime *runtime = substream->runtime;
995 snd_pcm_trigger_tstamp(substream);
996 if (push) {
997 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
998 if (substream->timer)
999 snd_timer_notify(substream->timer,
1000 SNDRV_TIMER_EVENT_MPAUSE,
1001 &runtime->trigger_tstamp);
1002 snd_pcm_tick_set(substream, 0);
1003 wake_up(&runtime->sleep);
1004 } else {
1005 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006 if (runtime->sleep_min)
1007 snd_pcm_tick_prepare(substream);
1008 if (substream->timer)
1009 snd_timer_notify(substream->timer,
1010 SNDRV_TIMER_EVENT_MCONTINUE,
1011 &runtime->trigger_tstamp);
1012 }
1013 }
1014
1015 static struct action_ops snd_pcm_action_pause = {
1016 .pre_action = snd_pcm_pre_pause,
1017 .do_action = snd_pcm_do_pause,
1018 .undo_action = snd_pcm_undo_pause,
1019 .post_action = snd_pcm_post_pause
1020 };
1021
1022 /*
1023 * Push/release the pause for all linked streams.
1024 */
1025 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1026 {
1027 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1028 }
1029
1030 #ifdef CONFIG_PM
1031 /* suspend */
1032
1033 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1034 {
1035 struct snd_pcm_runtime *runtime = substream->runtime;
1036 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1037 return -EBUSY;
1038 runtime->trigger_master = substream;
1039 return 0;
1040 }
1041
1042 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1043 {
1044 struct snd_pcm_runtime *runtime = substream->runtime;
1045 if (runtime->trigger_master != substream)
1046 return 0;
1047 if (! snd_pcm_running(substream))
1048 return 0;
1049 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1050 return 0; /* suspend unconditionally */
1051 }
1052
1053 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1054 {
1055 struct snd_pcm_runtime *runtime = substream->runtime;
1056 snd_pcm_trigger_tstamp(substream);
1057 if (substream->timer)
1058 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1059 &runtime->trigger_tstamp);
1060 runtime->status->suspended_state = runtime->status->state;
1061 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1062 snd_pcm_tick_set(substream, 0);
1063 wake_up(&runtime->sleep);
1064 }
1065
1066 static struct action_ops snd_pcm_action_suspend = {
1067 .pre_action = snd_pcm_pre_suspend,
1068 .do_action = snd_pcm_do_suspend,
1069 .post_action = snd_pcm_post_suspend
1070 };
1071
1072 /**
1073 * snd_pcm_suspend
1074 * @substream: the PCM substream
1075 *
1076 * Trigger SUSPEND to all linked streams.
1077 * After this call, all streams are changed to SUSPENDED state.
1078 */
1079 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1080 {
1081 int err;
1082 unsigned long flags;
1083
1084 if (! substream)
1085 return 0;
1086
1087 snd_pcm_stream_lock_irqsave(substream, flags);
1088 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1089 snd_pcm_stream_unlock_irqrestore(substream, flags);
1090 return err;
1091 }
1092
1093 EXPORT_SYMBOL(snd_pcm_suspend);
1094
1095 /**
1096 * snd_pcm_suspend_all
1097 * @pcm: the PCM instance
1098 *
1099 * Trigger SUSPEND to all substreams in the given pcm.
1100 * After this call, all streams are changed to SUSPENDED state.
1101 */
1102 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1103 {
1104 struct snd_pcm_substream *substream;
1105 int stream, err = 0;
1106
1107 if (! pcm)
1108 return 0;
1109
1110 for (stream = 0; stream < 2; stream++) {
1111 for (substream = pcm->streams[stream].substream;
1112 substream; substream = substream->next) {
1113 /* FIXME: the open/close code should lock this as well */
1114 if (substream->runtime == NULL)
1115 continue;
1116 err = snd_pcm_suspend(substream);
1117 if (err < 0 && err != -EBUSY)
1118 return err;
1119 }
1120 }
1121 return 0;
1122 }
1123
1124 EXPORT_SYMBOL(snd_pcm_suspend_all);
1125
1126 /* resume */
1127
1128 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1129 {
1130 struct snd_pcm_runtime *runtime = substream->runtime;
1131 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1132 return -ENOSYS;
1133 runtime->trigger_master = substream;
1134 return 0;
1135 }
1136
1137 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1138 {
1139 struct snd_pcm_runtime *runtime = substream->runtime;
1140 if (runtime->trigger_master != substream)
1141 return 0;
1142 /* DMA not running previously? */
1143 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1144 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1145 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1146 return 0;
1147 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1148 }
1149
1150 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1151 {
1152 if (substream->runtime->trigger_master == substream &&
1153 snd_pcm_running(substream))
1154 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1155 }
1156
1157 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159 struct snd_pcm_runtime *runtime = substream->runtime;
1160 snd_pcm_trigger_tstamp(substream);
1161 if (substream->timer)
1162 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1163 &runtime->trigger_tstamp);
1164 runtime->status->state = runtime->status->suspended_state;
1165 if (runtime->sleep_min)
1166 snd_pcm_tick_prepare(substream);
1167 }
1168
1169 static struct action_ops snd_pcm_action_resume = {
1170 .pre_action = snd_pcm_pre_resume,
1171 .do_action = snd_pcm_do_resume,
1172 .undo_action = snd_pcm_undo_resume,
1173 .post_action = snd_pcm_post_resume
1174 };
1175
1176 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1177 {
1178 struct snd_card *card = substream->pcm->card;
1179 int res;
1180
1181 snd_power_lock(card);
1182 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1183 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1184 snd_power_unlock(card);
1185 return res;
1186 }
1187
1188 #else
1189
1190 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1191 {
1192 return -ENOSYS;
1193 }
1194
1195 #endif /* CONFIG_PM */
1196
1197 /*
1198 * xrun ioctl
1199 *
1200 * Change the RUNNING stream(s) to XRUN state.
1201 */
1202 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1203 {
1204 struct snd_card *card = substream->pcm->card;
1205 struct snd_pcm_runtime *runtime = substream->runtime;
1206 int result;
1207
1208 snd_power_lock(card);
1209 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1210 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1211 if (result < 0)
1212 goto _unlock;
1213 }
1214
1215 snd_pcm_stream_lock_irq(substream);
1216 switch (runtime->status->state) {
1217 case SNDRV_PCM_STATE_XRUN:
1218 result = 0; /* already there */
1219 break;
1220 case SNDRV_PCM_STATE_RUNNING:
1221 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1222 break;
1223 default:
1224 result = -EBADFD;
1225 }
1226 snd_pcm_stream_unlock_irq(substream);
1227 _unlock:
1228 snd_power_unlock(card);
1229 return result;
1230 }
1231
1232 /*
1233 * reset ioctl
1234 */
1235 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1236 {
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1238 switch (runtime->status->state) {
1239 case SNDRV_PCM_STATE_RUNNING:
1240 case SNDRV_PCM_STATE_PREPARED:
1241 case SNDRV_PCM_STATE_PAUSED:
1242 case SNDRV_PCM_STATE_SUSPENDED:
1243 return 0;
1244 default:
1245 return -EBADFD;
1246 }
1247 }
1248
1249 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1250 {
1251 struct snd_pcm_runtime *runtime = substream->runtime;
1252 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1253 if (err < 0)
1254 return err;
1255 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1256 runtime->hw_ptr_base = 0;
1257 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1258 runtime->status->hw_ptr % runtime->period_size;
1259 runtime->silence_start = runtime->status->hw_ptr;
1260 runtime->silence_filled = 0;
1261 return 0;
1262 }
1263
1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1265 {
1266 struct snd_pcm_runtime *runtime = substream->runtime;
1267 runtime->control->appl_ptr = runtime->status->hw_ptr;
1268 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1269 runtime->silence_size > 0)
1270 snd_pcm_playback_silence(substream, ULONG_MAX);
1271 }
1272
1273 static struct action_ops snd_pcm_action_reset = {
1274 .pre_action = snd_pcm_pre_reset,
1275 .do_action = snd_pcm_do_reset,
1276 .post_action = snd_pcm_post_reset
1277 };
1278
1279 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1280 {
1281 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1282 }
1283
1284 /*
1285 * prepare ioctl
1286 */
1287 /* we use the second argument for updating f_flags */
1288 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1289 int f_flags)
1290 {
1291 struct snd_pcm_runtime *runtime = substream->runtime;
1292 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1293 return -EBADFD;
1294 if (snd_pcm_running(substream))
1295 return -EBUSY;
1296 substream->f_flags = f_flags;
1297 return 0;
1298 }
1299
1300 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1301 {
1302 int err;
1303 err = substream->ops->prepare(substream);
1304 if (err < 0)
1305 return err;
1306 return snd_pcm_do_reset(substream, 0);
1307 }
1308
1309 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1310 {
1311 struct snd_pcm_runtime *runtime = substream->runtime;
1312 runtime->control->appl_ptr = runtime->status->hw_ptr;
1313 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1314 }
1315
1316 static struct action_ops snd_pcm_action_prepare = {
1317 .pre_action = snd_pcm_pre_prepare,
1318 .do_action = snd_pcm_do_prepare,
1319 .post_action = snd_pcm_post_prepare
1320 };
1321
1322 /**
1323 * snd_pcm_prepare
1324 * @substream: the PCM substream instance
1325 * @file: file to refer f_flags
1326 *
1327 * Prepare the PCM substream to be triggerable.
1328 */
1329 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1330 struct file *file)
1331 {
1332 int res;
1333 struct snd_card *card = substream->pcm->card;
1334 int f_flags;
1335
1336 if (file)
1337 f_flags = file->f_flags;
1338 else
1339 f_flags = substream->f_flags;
1340
1341 snd_power_lock(card);
1342 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1343 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1344 substream, f_flags);
1345 snd_power_unlock(card);
1346 return res;
1347 }
1348
1349 /*
1350 * drain ioctl
1351 */
1352
1353 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1354 {
1355 if (substream->f_flags & O_NONBLOCK)
1356 return -EAGAIN;
1357 substream->runtime->trigger_master = substream;
1358 return 0;
1359 }
1360
1361 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1365 switch (runtime->status->state) {
1366 case SNDRV_PCM_STATE_PREPARED:
1367 /* start playback stream if possible */
1368 if (! snd_pcm_playback_empty(substream)) {
1369 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1370 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1371 }
1372 break;
1373 case SNDRV_PCM_STATE_RUNNING:
1374 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1375 break;
1376 default:
1377 break;
1378 }
1379 } else {
1380 /* stop running stream */
1381 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1382 int state = snd_pcm_capture_avail(runtime) > 0 ?
1383 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1384 snd_pcm_do_stop(substream, state);
1385 snd_pcm_post_stop(substream, state);
1386 }
1387 }
1388 return 0;
1389 }
1390
1391 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1392 {
1393 }
1394
1395 static struct action_ops snd_pcm_action_drain_init = {
1396 .pre_action = snd_pcm_pre_drain_init,
1397 .do_action = snd_pcm_do_drain_init,
1398 .post_action = snd_pcm_post_drain_init
1399 };
1400
1401 struct drain_rec {
1402 struct snd_pcm_substream *substream;
1403 wait_queue_t wait;
1404 snd_pcm_uframes_t stop_threshold;
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 {
1418 struct snd_card *card;
1419 struct snd_pcm_runtime *runtime;
1420 struct list_head *pos;
1421 int result = 0;
1422 int i, num_drecs;
1423 struct drain_rec *drec, drec_tmp, *d;
1424
1425 snd_assert(substream != NULL, return -ENXIO);
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 /* allocate temporary record for drain sync */
1442 down_read(&snd_pcm_link_rwsem);
1443 if (snd_pcm_stream_linked(substream)) {
1444 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1445 if (! drec) {
1446 up_read(&snd_pcm_link_rwsem);
1447 snd_power_unlock(card);
1448 return -ENOMEM;
1449 }
1450 } else
1451 drec = &drec_tmp;
1452
1453 /* count only playback streams */
1454 num_drecs = 0;
1455 snd_pcm_group_for_each(pos, substream) {
1456 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1457 runtime = s->runtime;
1458 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1459 d = &drec[num_drecs++];
1460 d->substream = s;
1461 init_waitqueue_entry(&d->wait, current);
1462 add_wait_queue(&runtime->sleep, &d->wait);
1463 /* stop_threshold fixup to avoid endless loop when
1464 * stop_threshold > buffer_size
1465 */
1466 d->stop_threshold = runtime->stop_threshold;
1467 if (runtime->stop_threshold > runtime->buffer_size)
1468 runtime->stop_threshold = runtime->buffer_size;
1469 }
1470 }
1471 up_read(&snd_pcm_link_rwsem);
1472 if (! num_drecs)
1473 goto _error;
1474
1475 snd_pcm_stream_lock_irq(substream);
1476 /* resume pause */
1477 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1478 snd_pcm_pause(substream, 0);
1479
1480 /* pre-start/stop - all running streams are changed to DRAINING state */
1481 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1482 if (result < 0) {
1483 snd_pcm_stream_unlock_irq(substream);
1484 goto _error;
1485 }
1486
1487 for (;;) {
1488 long tout;
1489 if (signal_pending(current)) {
1490 result = -ERESTARTSYS;
1491 break;
1492 }
1493 /* all finished? */
1494 for (i = 0; i < num_drecs; i++) {
1495 runtime = drec[i].substream->runtime;
1496 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1497 break;
1498 }
1499 if (i == num_drecs)
1500 break; /* yes, all drained */
1501
1502 set_current_state(TASK_INTERRUPTIBLE);
1503 snd_pcm_stream_unlock_irq(substream);
1504 snd_power_unlock(card);
1505 tout = schedule_timeout(10 * HZ);
1506 snd_power_lock(card);
1507 snd_pcm_stream_lock_irq(substream);
1508 if (tout == 0) {
1509 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1510 result = -ESTRPIPE;
1511 else {
1512 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1513 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1514 result = -EIO;
1515 }
1516 break;
1517 }
1518 }
1519
1520 snd_pcm_stream_unlock_irq(substream);
1521
1522 _error:
1523 for (i = 0; i < num_drecs; i++) {
1524 d = &drec[i];
1525 runtime = d->substream->runtime;
1526 remove_wait_queue(&runtime->sleep, &d->wait);
1527 runtime->stop_threshold = d->stop_threshold;
1528 }
1529
1530 if (drec != &drec_tmp)
1531 kfree(drec);
1532 snd_power_unlock(card);
1533
1534 return result;
1535 }
1536
1537 /*
1538 * drop ioctl
1539 *
1540 * Immediately put all linked substreams into SETUP state.
1541 */
1542 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1543 {
1544 struct snd_pcm_runtime *runtime;
1545 struct snd_card *card;
1546 int result = 0;
1547
1548 snd_assert(substream != NULL, return -ENXIO);
1549 runtime = substream->runtime;
1550 card = substream->pcm->card;
1551
1552 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1553 return -EBADFD;
1554
1555 snd_power_lock(card);
1556 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1557 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1558 if (result < 0)
1559 goto _unlock;
1560 }
1561
1562 snd_pcm_stream_lock_irq(substream);
1563 /* resume pause */
1564 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1565 snd_pcm_pause(substream, 0);
1566
1567 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1568 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1569 snd_pcm_stream_unlock_irq(substream);
1570 _unlock:
1571 snd_power_unlock(card);
1572 return result;
1573 }
1574
1575
1576 /* WARNING: Don't forget to fput back the file */
1577 static struct file *snd_pcm_file_fd(int fd)
1578 {
1579 struct file *file;
1580 struct inode *inode;
1581 unsigned int minor;
1582
1583 file = fget(fd);
1584 if (!file)
1585 return NULL;
1586 inode = file->f_dentry->d_inode;
1587 if (!S_ISCHR(inode->i_mode) ||
1588 imajor(inode) != snd_major) {
1589 fput(file);
1590 return NULL;
1591 }
1592 minor = iminor(inode);
1593 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1594 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1595 fput(file);
1596 return NULL;
1597 }
1598 return file;
1599 }
1600
1601 /*
1602 * PCM link handling
1603 */
1604 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1605 {
1606 int res = 0;
1607 struct file *file;
1608 struct snd_pcm_file *pcm_file;
1609 struct snd_pcm_substream *substream1;
1610
1611 file = snd_pcm_file_fd(fd);
1612 if (!file)
1613 return -EBADFD;
1614 pcm_file = file->private_data;
1615 substream1 = pcm_file->substream;
1616 down_write(&snd_pcm_link_rwsem);
1617 write_lock_irq(&snd_pcm_link_rwlock);
1618 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1619 substream->runtime->status->state != substream1->runtime->status->state) {
1620 res = -EBADFD;
1621 goto _end;
1622 }
1623 if (snd_pcm_stream_linked(substream1)) {
1624 res = -EALREADY;
1625 goto _end;
1626 }
1627 if (!snd_pcm_stream_linked(substream)) {
1628 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1629 if (substream->group == NULL) {
1630 res = -ENOMEM;
1631 goto _end;
1632 }
1633 spin_lock_init(&substream->group->lock);
1634 INIT_LIST_HEAD(&substream->group->substreams);
1635 list_add_tail(&substream->link_list, &substream->group->substreams);
1636 substream->group->count = 1;
1637 }
1638 list_add_tail(&substream1->link_list, &substream->group->substreams);
1639 substream->group->count++;
1640 substream1->group = substream->group;
1641 _end:
1642 write_unlock_irq(&snd_pcm_link_rwlock);
1643 up_write(&snd_pcm_link_rwsem);
1644 fput(file);
1645 return res;
1646 }
1647
1648 static void relink_to_local(struct snd_pcm_substream *substream)
1649 {
1650 substream->group = &substream->self_group;
1651 INIT_LIST_HEAD(&substream->self_group.substreams);
1652 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1653 }
1654
1655 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1656 {
1657 struct list_head *pos;
1658 int res = 0;
1659
1660 down_write(&snd_pcm_link_rwsem);
1661 write_lock_irq(&snd_pcm_link_rwlock);
1662 if (!snd_pcm_stream_linked(substream)) {
1663 res = -EALREADY;
1664 goto _end;
1665 }
1666 list_del(&substream->link_list);
1667 substream->group->count--;
1668 if (substream->group->count == 1) { /* detach the last stream, too */
1669 snd_pcm_group_for_each(pos, substream) {
1670 relink_to_local(snd_pcm_group_substream_entry(pos));
1671 break;
1672 }
1673 kfree(substream->group);
1674 }
1675 relink_to_local(substream);
1676 _end:
1677 write_unlock_irq(&snd_pcm_link_rwlock);
1678 up_write(&snd_pcm_link_rwsem);
1679 return res;
1680 }
1681
1682 /*
1683 * hw configurator
1684 */
1685 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1686 struct snd_pcm_hw_rule *rule)
1687 {
1688 struct snd_interval t;
1689 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1690 hw_param_interval_c(params, rule->deps[1]), &t);
1691 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1692 }
1693
1694 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1695 struct snd_pcm_hw_rule *rule)
1696 {
1697 struct snd_interval t;
1698 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1699 hw_param_interval_c(params, rule->deps[1]), &t);
1700 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1701 }
1702
1703 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1704 struct snd_pcm_hw_rule *rule)
1705 {
1706 struct snd_interval t;
1707 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1708 hw_param_interval_c(params, rule->deps[1]),
1709 (unsigned long) rule->private, &t);
1710 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1711 }
1712
1713 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1714 struct snd_pcm_hw_rule *rule)
1715 {
1716 struct snd_interval t;
1717 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1718 (unsigned long) rule->private,
1719 hw_param_interval_c(params, rule->deps[1]), &t);
1720 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1721 }
1722
1723 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1724 struct snd_pcm_hw_rule *rule)
1725 {
1726 unsigned int k;
1727 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1728 struct snd_mask m;
1729 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1730 snd_mask_any(&m);
1731 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1732 int bits;
1733 if (! snd_mask_test(mask, k))
1734 continue;
1735 bits = snd_pcm_format_physical_width(k);
1736 if (bits <= 0)
1737 continue; /* ignore invalid formats */
1738 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1739 snd_mask_reset(&m, k);
1740 }
1741 return snd_mask_refine(mask, &m);
1742 }
1743
1744 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1745 struct snd_pcm_hw_rule *rule)
1746 {
1747 struct snd_interval t;
1748 unsigned int k;
1749 t.min = UINT_MAX;
1750 t.max = 0;
1751 t.openmin = 0;
1752 t.openmax = 0;
1753 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1754 int bits;
1755 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1756 continue;
1757 bits = snd_pcm_format_physical_width(k);
1758 if (bits <= 0)
1759 continue; /* ignore invalid formats */
1760 if (t.min > (unsigned)bits)
1761 t.min = bits;
1762 if (t.max < (unsigned)bits)
1763 t.max = bits;
1764 }
1765 t.integer = 1;
1766 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1767 }
1768
1769 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1770 #error "Change this table"
1771 #endif
1772
1773 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1774 48000, 64000, 88200, 96000, 176400, 192000 };
1775
1776 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1777 struct snd_pcm_hw_rule *rule)
1778 {
1779 struct snd_pcm_hardware *hw = rule->private;
1780 return snd_interval_list(hw_param_interval(params, rule->var),
1781 ARRAY_SIZE(rates), rates, hw->rates);
1782 }
1783
1784 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1785 struct snd_pcm_hw_rule *rule)
1786 {
1787 struct snd_interval t;
1788 struct snd_pcm_substream *substream = rule->private;
1789 t.min = 0;
1790 t.max = substream->buffer_bytes_max;
1791 t.openmin = 0;
1792 t.openmax = 0;
1793 t.integer = 1;
1794 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1795 }
1796
1797 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1798 {
1799 struct snd_pcm_runtime *runtime = substream->runtime;
1800 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1801 int k, err;
1802
1803 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1804 snd_mask_any(constrs_mask(constrs, k));
1805 }
1806
1807 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1808 snd_interval_any(constrs_interval(constrs, k));
1809 }
1810
1811 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1816
1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1818 snd_pcm_hw_rule_format, NULL,
1819 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1820 if (err < 0)
1821 return err;
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1823 snd_pcm_hw_rule_sample_bits, NULL,
1824 SNDRV_PCM_HW_PARAM_FORMAT,
1825 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1826 if (err < 0)
1827 return err;
1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1829 snd_pcm_hw_rule_div, NULL,
1830 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1831 if (err < 0)
1832 return err;
1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1834 snd_pcm_hw_rule_mul, NULL,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1839 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1840 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1845 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1849 snd_pcm_hw_rule_div, NULL,
1850 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1854 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1855 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1859 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1860 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1864 snd_pcm_hw_rule_div, NULL,
1865 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1869 snd_pcm_hw_rule_div, NULL,
1870 SNDRV_PCM_HW_PARAM_BUFFER_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_PERIOD_SIZE,
1874 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1875 SNDRV_PCM_HW_PARAM_PERIOD_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_PERIOD_SIZE,
1879 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1880 SNDRV_PCM_HW_PARAM_PERIOD_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_BUFFER_SIZE,
1884 snd_pcm_hw_rule_mul, NULL,
1885 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1886 if (err < 0)
1887 return err;
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1889 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1890 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 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_BUFFER_SIZE,
1894 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1895 SNDRV_PCM_HW_PARAM_BUFFER_TIME, 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_PERIOD_BYTES,
1899 snd_pcm_hw_rule_muldivk, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1901 if (err < 0)
1902 return err;
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1904 snd_pcm_hw_rule_muldivk, (void*) 8,
1905 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1906 if (err < 0)
1907 return err;
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1909 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1911 if (err < 0)
1912 return err;
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1914 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1916 if (err < 0)
1917 return err;
1918 return 0;
1919 }
1920
1921 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1922 {
1923 struct snd_pcm_runtime *runtime = substream->runtime;
1924 struct snd_pcm_hardware *hw = &runtime->hw;
1925 int err;
1926 unsigned int mask = 0;
1927
1928 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1929 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1930 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1931 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1932 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1933 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1934 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1935 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1936 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1937 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1938 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1939 }
1940 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1941 snd_assert(err >= 0, return -EINVAL);
1942
1943 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1944 snd_assert(err >= 0, return -EINVAL);
1945
1946 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1947 snd_assert(err >= 0, return -EINVAL);
1948
1949 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1950 hw->channels_min, hw->channels_max);
1951 snd_assert(err >= 0, return -EINVAL);
1952
1953 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1954 hw->rate_min, hw->rate_max);
1955 snd_assert(err >= 0, return -EINVAL);
1956
1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1958 hw->period_bytes_min, hw->period_bytes_max);
1959 snd_assert(err >= 0, return -EINVAL);
1960
1961 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1962 hw->periods_min, hw->periods_max);
1963 snd_assert(err >= 0, return -EINVAL);
1964
1965 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1966 hw->period_bytes_min, hw->buffer_bytes_max);
1967 snd_assert(err >= 0, return -EINVAL);
1968
1969 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1970 snd_pcm_hw_rule_buffer_bytes_max, substream,
1971 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1972 if (err < 0)
1973 return err;
1974
1975 /* FIXME: remove */
1976 if (runtime->dma_bytes) {
1977 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1978 snd_assert(err >= 0, return -EINVAL);
1979 }
1980
1981 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1982 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1983 snd_pcm_hw_rule_rate, hw,
1984 SNDRV_PCM_HW_PARAM_RATE, -1);
1985 if (err < 0)
1986 return err;
1987 }
1988
1989 /* FIXME: this belong to lowlevel */
1990 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1991 1000000 / HZ, 1000000 / HZ);
1992 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1993
1994 return 0;
1995 }
1996
1997 static void snd_pcm_add_file(struct snd_pcm_str *str,
1998 struct snd_pcm_file *pcm_file)
1999 {
2000 pcm_file->next = str->files;
2001 str->files = pcm_file;
2002 }
2003
2004 static void snd_pcm_remove_file(struct snd_pcm_str *str,
2005 struct snd_pcm_file *pcm_file)
2006 {
2007 struct snd_pcm_file * pcm_file1;
2008 if (str->files == pcm_file) {
2009 str->files = pcm_file->next;
2010 } else {
2011 pcm_file1 = str->files;
2012 while (pcm_file1 && pcm_file1->next != pcm_file)
2013 pcm_file1 = pcm_file1->next;
2014 if (pcm_file1 != NULL)
2015 pcm_file1->next = pcm_file->next;
2016 }
2017 }
2018
2019 static void pcm_release_private(struct snd_pcm_substream *substream)
2020 {
2021 struct snd_pcm_file *pcm_file = substream->file;
2022
2023 snd_pcm_unlink(substream);
2024 snd_pcm_remove_file(substream->pstr, pcm_file);
2025 kfree(pcm_file);
2026 }
2027
2028 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2029 {
2030 substream->ref_count--;
2031 if (substream->ref_count > 0)
2032 return;
2033
2034 snd_pcm_drop(substream);
2035 if (substream->hw_opened) {
2036 if (substream->ops->hw_free != NULL)
2037 substream->ops->hw_free(substream);
2038 substream->ops->close(substream);
2039 substream->hw_opened = 0;
2040 }
2041 if (substream->pcm_release) {
2042 substream->pcm_release(substream);
2043 substream->pcm_release = NULL;
2044 }
2045 snd_pcm_detach_substream(substream);
2046 }
2047
2048 EXPORT_SYMBOL(snd_pcm_release_substream);
2049
2050 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2051 struct file *file,
2052 struct snd_pcm_substream **rsubstream)
2053 {
2054 struct snd_pcm_substream *substream;
2055 int err;
2056
2057 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2058 if (err < 0)
2059 return err;
2060 if (substream->ref_count > 1) {
2061 *rsubstream = substream;
2062 return 0;
2063 }
2064
2065 substream->no_mmap_ctrl = 0;
2066 err = snd_pcm_hw_constraints_init(substream);
2067 if (err < 0) {
2068 snd_printd("snd_pcm_hw_constraints_init failed\n");
2069 goto error;
2070 }
2071
2072 if ((err = substream->ops->open(substream)) < 0)
2073 goto error;
2074
2075 substream->hw_opened = 1;
2076
2077 err = snd_pcm_hw_constraints_complete(substream);
2078 if (err < 0) {
2079 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2080 goto error;
2081 }
2082
2083 *rsubstream = substream;
2084 return 0;
2085
2086 error:
2087 snd_pcm_release_substream(substream);
2088 return err;
2089 }
2090
2091 EXPORT_SYMBOL(snd_pcm_open_substream);
2092
2093 static int snd_pcm_open_file(struct file *file,
2094 struct snd_pcm *pcm,
2095 int stream,
2096 struct snd_pcm_file **rpcm_file)
2097 {
2098 struct snd_pcm_file *pcm_file;
2099 struct snd_pcm_substream *substream;
2100 struct snd_pcm_str *str;
2101 int err;
2102
2103 snd_assert(rpcm_file != NULL, return -EINVAL);
2104 *rpcm_file = NULL;
2105
2106 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2107 if (err < 0)
2108 return err;
2109
2110 if (substream->ref_count > 1)
2111 pcm_file = substream->file;
2112 else {
2113 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2114 if (pcm_file == NULL) {
2115 snd_pcm_release_substream(substream);
2116 return -ENOMEM;
2117 }
2118 str = substream->pstr;
2119 substream->file = pcm_file;
2120 substream->pcm_release = pcm_release_private;
2121 pcm_file->substream = substream;
2122 snd_pcm_add_file(str, pcm_file);
2123 }
2124 file->private_data = pcm_file;
2125 *rpcm_file = pcm_file;
2126 return 0;
2127 }
2128
2129 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2130 {
2131 struct snd_pcm *pcm;
2132
2133 pcm = snd_lookup_minor_data(iminor(inode),
2134 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2135 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2136 }
2137
2138 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2139 {
2140 struct snd_pcm *pcm;
2141
2142 pcm = snd_lookup_minor_data(iminor(inode),
2143 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2144 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2145 }
2146
2147 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2148 {
2149 int err;
2150 struct snd_pcm_file *pcm_file;
2151 wait_queue_t wait;
2152
2153 if (pcm == NULL) {
2154 err = -ENODEV;
2155 goto __error1;
2156 }
2157 err = snd_card_file_add(pcm->card, file);
2158 if (err < 0)
2159 goto __error1;
2160 if (!try_module_get(pcm->card->module)) {
2161 err = -EFAULT;
2162 goto __error2;
2163 }
2164 init_waitqueue_entry(&wait, current);
2165 add_wait_queue(&pcm->open_wait, &wait);
2166 mutex_lock(&pcm->open_mutex);
2167 while (1) {
2168 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2169 if (err >= 0)
2170 break;
2171 if (err == -EAGAIN) {
2172 if (file->f_flags & O_NONBLOCK) {
2173 err = -EBUSY;
2174 break;
2175 }
2176 } else
2177 break;
2178 set_current_state(TASK_INTERRUPTIBLE);
2179 mutex_unlock(&pcm->open_mutex);
2180 schedule();
2181 mutex_lock(&pcm->open_mutex);
2182 if (signal_pending(current)) {
2183 err = -ERESTARTSYS;
2184 break;
2185 }
2186 }
2187 remove_wait_queue(&pcm->open_wait, &wait);
2188 mutex_unlock(&pcm->open_mutex);
2189 if (err < 0)
2190 goto __error;
2191 return err;
2192
2193 __error:
2194 module_put(pcm->card->module);
2195 __error2:
2196 snd_card_file_remove(pcm->card, file);
2197 __error1:
2198 return err;
2199 }
2200
2201 static int snd_pcm_release(struct inode *inode, struct file *file)
2202 {
2203 struct snd_pcm *pcm;
2204 struct snd_pcm_substream *substream;
2205 struct snd_pcm_file *pcm_file;
2206
2207 pcm_file = file->private_data;
2208 substream = pcm_file->substream;
2209 snd_assert(substream != NULL, return -ENXIO);
2210 snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2211 pcm = substream->pcm;
2212 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2213 mutex_lock(&pcm->open_mutex);
2214 snd_pcm_release_substream(substream);
2215 mutex_unlock(&pcm->open_mutex);
2216 wake_up(&pcm->open_wait);
2217 module_put(pcm->card->module);
2218 snd_card_file_remove(pcm->card, file);
2219 return 0;
2220 }
2221
2222 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2223 snd_pcm_uframes_t frames)
2224 {
2225 struct snd_pcm_runtime *runtime = substream->runtime;
2226 snd_pcm_sframes_t appl_ptr;
2227 snd_pcm_sframes_t ret;
2228 snd_pcm_sframes_t hw_avail;
2229
2230 if (frames == 0)
2231 return 0;
2232
2233 snd_pcm_stream_lock_irq(substream);
2234 switch (runtime->status->state) {
2235 case SNDRV_PCM_STATE_PREPARED:
2236 break;
2237 case SNDRV_PCM_STATE_DRAINING:
2238 case SNDRV_PCM_STATE_RUNNING:
2239 if (snd_pcm_update_hw_ptr(substream) >= 0)
2240 break;
2241 /* Fall through */
2242 case SNDRV_PCM_STATE_XRUN:
2243 ret = -EPIPE;
2244 goto __end;
2245 default:
2246 ret = -EBADFD;
2247 goto __end;
2248 }
2249
2250 hw_avail = snd_pcm_playback_hw_avail(runtime);
2251 if (hw_avail <= 0) {
2252 ret = 0;
2253 goto __end;
2254 }
2255 if (frames > (snd_pcm_uframes_t)hw_avail)
2256 frames = hw_avail;
2257 else
2258 frames -= frames % runtime->xfer_align;
2259 appl_ptr = runtime->control->appl_ptr - frames;
2260 if (appl_ptr < 0)
2261 appl_ptr += runtime->boundary;
2262 runtime->control->appl_ptr = appl_ptr;
2263 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2264 runtime->sleep_min)
2265 snd_pcm_tick_prepare(substream);
2266 ret = frames;
2267 __end:
2268 snd_pcm_stream_unlock_irq(substream);
2269 return ret;
2270 }
2271
2272 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2273 snd_pcm_uframes_t frames)
2274 {
2275 struct snd_pcm_runtime *runtime = substream->runtime;
2276 snd_pcm_sframes_t appl_ptr;
2277 snd_pcm_sframes_t ret;
2278 snd_pcm_sframes_t hw_avail;
2279
2280 if (frames == 0)
2281 return 0;
2282
2283 snd_pcm_stream_lock_irq(substream);
2284 switch (runtime->status->state) {
2285 case SNDRV_PCM_STATE_PREPARED:
2286 case SNDRV_PCM_STATE_DRAINING:
2287 break;
2288 case SNDRV_PCM_STATE_RUNNING:
2289 if (snd_pcm_update_hw_ptr(substream) >= 0)
2290 break;
2291 /* Fall through */
2292 case SNDRV_PCM_STATE_XRUN:
2293 ret = -EPIPE;
2294 goto __end;
2295 default:
2296 ret = -EBADFD;
2297 goto __end;
2298 }
2299
2300 hw_avail = snd_pcm_capture_hw_avail(runtime);
2301 if (hw_avail <= 0) {
2302 ret = 0;
2303 goto __end;
2304 }
2305 if (frames > (snd_pcm_uframes_t)hw_avail)
2306 frames = hw_avail;
2307 else
2308 frames -= frames % runtime->xfer_align;
2309 appl_ptr = runtime->control->appl_ptr - frames;
2310 if (appl_ptr < 0)
2311 appl_ptr += runtime->boundary;
2312 runtime->control->appl_ptr = appl_ptr;
2313 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2314 runtime->sleep_min)
2315 snd_pcm_tick_prepare(substream);
2316 ret = frames;
2317 __end:
2318 snd_pcm_stream_unlock_irq(substream);
2319 return ret;
2320 }
2321
2322 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2323 snd_pcm_uframes_t frames)
2324 {
2325 struct snd_pcm_runtime *runtime = substream->runtime;
2326 snd_pcm_sframes_t appl_ptr;
2327 snd_pcm_sframes_t ret;
2328 snd_pcm_sframes_t avail;
2329
2330 if (frames == 0)
2331 return 0;
2332
2333 snd_pcm_stream_lock_irq(substream);
2334 switch (runtime->status->state) {
2335 case SNDRV_PCM_STATE_PREPARED:
2336 case SNDRV_PCM_STATE_PAUSED:
2337 break;
2338 case SNDRV_PCM_STATE_DRAINING:
2339 case SNDRV_PCM_STATE_RUNNING:
2340 if (snd_pcm_update_hw_ptr(substream) >= 0)
2341 break;
2342 /* Fall through */
2343 case SNDRV_PCM_STATE_XRUN:
2344 ret = -EPIPE;
2345 goto __end;
2346 default:
2347 ret = -EBADFD;
2348 goto __end;
2349 }
2350
2351 avail = snd_pcm_playback_avail(runtime);
2352 if (avail <= 0) {
2353 ret = 0;
2354 goto __end;
2355 }
2356 if (frames > (snd_pcm_uframes_t)avail)
2357 frames = avail;
2358 else
2359 frames -= frames % runtime->xfer_align;
2360 appl_ptr = runtime->control->appl_ptr + frames;
2361 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2362 appl_ptr -= runtime->boundary;
2363 runtime->control->appl_ptr = appl_ptr;
2364 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2365 runtime->sleep_min)
2366 snd_pcm_tick_prepare(substream);
2367 ret = frames;
2368 __end:
2369 snd_pcm_stream_unlock_irq(substream);
2370 return ret;
2371 }
2372
2373 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2374 snd_pcm_uframes_t frames)
2375 {
2376 struct snd_pcm_runtime *runtime = substream->runtime;
2377 snd_pcm_sframes_t appl_ptr;
2378 snd_pcm_sframes_t ret;
2379 snd_pcm_sframes_t avail;
2380
2381 if (frames == 0)
2382 return 0;
2383
2384 snd_pcm_stream_lock_irq(substream);
2385 switch (runtime->status->state) {
2386 case SNDRV_PCM_STATE_PREPARED:
2387 case SNDRV_PCM_STATE_DRAINING:
2388 case SNDRV_PCM_STATE_PAUSED:
2389 break;
2390 case SNDRV_PCM_STATE_RUNNING:
2391 if (snd_pcm_update_hw_ptr(substream) >= 0)
2392 break;
2393 /* Fall through */
2394 case SNDRV_PCM_STATE_XRUN:
2395 ret = -EPIPE;
2396 goto __end;
2397 default:
2398 ret = -EBADFD;
2399 goto __end;
2400 }
2401
2402 avail = snd_pcm_capture_avail(runtime);
2403 if (avail <= 0) {
2404 ret = 0;
2405 goto __end;
2406 }
2407 if (frames > (snd_pcm_uframes_t)avail)
2408 frames = avail;
2409 else
2410 frames -= frames % runtime->xfer_align;
2411 appl_ptr = runtime->control->appl_ptr + frames;
2412 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2413 appl_ptr -= runtime->boundary;
2414 runtime->control->appl_ptr = appl_ptr;
2415 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2416 runtime->sleep_min)
2417 snd_pcm_tick_prepare(substream);
2418 ret = frames;
2419 __end:
2420 snd_pcm_stream_unlock_irq(substream);
2421 return ret;
2422 }
2423
2424 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2425 {
2426 struct snd_pcm_runtime *runtime = substream->runtime;
2427 int err;
2428
2429 snd_pcm_stream_lock_irq(substream);
2430 switch (runtime->status->state) {
2431 case SNDRV_PCM_STATE_DRAINING:
2432 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2433 goto __badfd;
2434 case SNDRV_PCM_STATE_RUNNING:
2435 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2436 break;
2437 /* Fall through */
2438 case SNDRV_PCM_STATE_PREPARED:
2439 case SNDRV_PCM_STATE_SUSPENDED:
2440 err = 0;
2441 break;
2442 case SNDRV_PCM_STATE_XRUN:
2443 err = -EPIPE;
2444 break;
2445 default:
2446 __badfd:
2447 err = -EBADFD;
2448 break;
2449 }
2450 snd_pcm_stream_unlock_irq(substream);
2451 return err;
2452 }
2453
2454 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2455 snd_pcm_sframes_t __user *res)
2456 {
2457 struct snd_pcm_runtime *runtime = substream->runtime;
2458 int err;
2459 snd_pcm_sframes_t n = 0;
2460
2461 snd_pcm_stream_lock_irq(substream);
2462 switch (runtime->status->state) {
2463 case SNDRV_PCM_STATE_DRAINING:
2464 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2465 goto __badfd;
2466 case SNDRV_PCM_STATE_RUNNING:
2467 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2468 break;
2469 /* Fall through */
2470 case SNDRV_PCM_STATE_PREPARED:
2471 case SNDRV_PCM_STATE_SUSPENDED:
2472 err = 0;
2473 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2474 n = snd_pcm_playback_hw_avail(runtime);
2475 else
2476 n = snd_pcm_capture_avail(runtime);
2477 break;
2478 case SNDRV_PCM_STATE_XRUN:
2479 err = -EPIPE;
2480 break;
2481 default:
2482 __badfd:
2483 err = -EBADFD;
2484 break;
2485 }
2486 snd_pcm_stream_unlock_irq(substream);
2487 if (!err)
2488 if (put_user(n, res))
2489 err = -EFAULT;
2490 return err;
2491 }
2492
2493 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2494 struct snd_pcm_sync_ptr __user *_sync_ptr)
2495 {
2496 struct snd_pcm_runtime *runtime = substream->runtime;
2497 struct snd_pcm_sync_ptr sync_ptr;
2498 volatile struct snd_pcm_mmap_status *status;
2499 volatile struct snd_pcm_mmap_control *control;
2500 int err;
2501
2502 memset(&sync_ptr, 0, sizeof(sync_ptr));
2503 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2504 return -EFAULT;
2505 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2506 return -EFAULT;
2507 status = runtime->status;
2508 control = runtime->control;
2509 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2510 err = snd_pcm_hwsync(substream);
2511 if (err < 0)
2512 return err;
2513 }
2514 snd_pcm_stream_lock_irq(substream);
2515 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2516 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2517 else
2518 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2519 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2520 control->avail_min = sync_ptr.c.control.avail_min;
2521 else
2522 sync_ptr.c.control.avail_min = control->avail_min;
2523 sync_ptr.s.status.state = status->state;
2524 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2525 sync_ptr.s.status.tstamp = status->tstamp;
2526 sync_ptr.s.status.suspended_state = status->suspended_state;
2527 snd_pcm_stream_unlock_irq(substream);
2528 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2529 return -EFAULT;
2530 return 0;
2531 }
2532
2533 static int snd_pcm_common_ioctl1(struct file *file,
2534 struct snd_pcm_substream *substream,
2535 unsigned int cmd, void __user *arg)
2536 {
2537 snd_assert(substream != NULL, return -ENXIO);
2538
2539 switch (cmd) {
2540 case SNDRV_PCM_IOCTL_PVERSION:
2541 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2542 case SNDRV_PCM_IOCTL_INFO:
2543 return snd_pcm_info_user(substream, arg);
2544 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2545 return 0;
2546 case SNDRV_PCM_IOCTL_HW_REFINE:
2547 return snd_pcm_hw_refine_user(substream, arg);
2548 case SNDRV_PCM_IOCTL_HW_PARAMS:
2549 return snd_pcm_hw_params_user(substream, arg);
2550 case SNDRV_PCM_IOCTL_HW_FREE:
2551 return snd_pcm_hw_free(substream);
2552 case SNDRV_PCM_IOCTL_SW_PARAMS:
2553 return snd_pcm_sw_params_user(substream, arg);
2554 case SNDRV_PCM_IOCTL_STATUS:
2555 return snd_pcm_status_user(substream, arg);
2556 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2557 return snd_pcm_channel_info_user(substream, arg);
2558 case SNDRV_PCM_IOCTL_PREPARE:
2559 return snd_pcm_prepare(substream, file);
2560 case SNDRV_PCM_IOCTL_RESET:
2561 return snd_pcm_reset(substream);
2562 case SNDRV_PCM_IOCTL_START:
2563 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2564 case SNDRV_PCM_IOCTL_LINK:
2565 return snd_pcm_link(substream, (int)(unsigned long) arg);
2566 case SNDRV_PCM_IOCTL_UNLINK:
2567 return snd_pcm_unlink(substream);
2568 case SNDRV_PCM_IOCTL_RESUME:
2569 return snd_pcm_resume(substream);
2570 case SNDRV_PCM_IOCTL_XRUN:
2571 return snd_pcm_xrun(substream);
2572 case SNDRV_PCM_IOCTL_HWSYNC:
2573 return snd_pcm_hwsync(substream);
2574 case SNDRV_PCM_IOCTL_DELAY:
2575 return snd_pcm_delay(substream, arg);
2576 case SNDRV_PCM_IOCTL_SYNC_PTR:
2577 return snd_pcm_sync_ptr(substream, arg);
2578 #ifdef CONFIG_SND_SUPPORT_OLD_API
2579 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2580 return snd_pcm_hw_refine_old_user(substream, arg);
2581 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2582 return snd_pcm_hw_params_old_user(substream, arg);
2583 #endif
2584 case SNDRV_PCM_IOCTL_DRAIN:
2585 return snd_pcm_drain(substream);
2586 case SNDRV_PCM_IOCTL_DROP:
2587 return snd_pcm_drop(substream);
2588 case SNDRV_PCM_IOCTL_PAUSE:
2589 {
2590 int res;
2591 snd_pcm_stream_lock_irq(substream);
2592 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2593 snd_pcm_stream_unlock_irq(substream);
2594 return res;
2595 }
2596 }
2597 snd_printd("unknown ioctl = 0x%x\n", cmd);
2598 return -ENOTTY;
2599 }
2600
2601 static int snd_pcm_playback_ioctl1(struct file *file,
2602 struct snd_pcm_substream *substream,
2603 unsigned int cmd, void __user *arg)
2604 {
2605 snd_assert(substream != NULL, return -ENXIO);
2606 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2607 switch (cmd) {
2608 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2609 {
2610 struct snd_xferi xferi;
2611 struct snd_xferi __user *_xferi = arg;
2612 struct snd_pcm_runtime *runtime = substream->runtime;
2613 snd_pcm_sframes_t result;
2614 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2615 return -EBADFD;
2616 if (put_user(0, &_xferi->result))
2617 return -EFAULT;
2618 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2619 return -EFAULT;
2620 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2621 __put_user(result, &_xferi->result);
2622 return result < 0 ? result : 0;
2623 }
2624 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2625 {
2626 struct snd_xfern xfern;
2627 struct snd_xfern __user *_xfern = arg;
2628 struct snd_pcm_runtime *runtime = substream->runtime;
2629 void __user **bufs;
2630 snd_pcm_sframes_t result;
2631 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2632 return -EBADFD;
2633 if (runtime->channels > 128)
2634 return -EINVAL;
2635 if (put_user(0, &_xfern->result))
2636 return -EFAULT;
2637 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2638 return -EFAULT;
2639 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2640 if (bufs == NULL)
2641 return -ENOMEM;
2642 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2643 kfree(bufs);
2644 return -EFAULT;
2645 }
2646 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2647 kfree(bufs);
2648 __put_user(result, &_xfern->result);
2649 return result < 0 ? result : 0;
2650 }
2651 case SNDRV_PCM_IOCTL_REWIND:
2652 {
2653 snd_pcm_uframes_t frames;
2654 snd_pcm_uframes_t __user *_frames = arg;
2655 snd_pcm_sframes_t result;
2656 if (get_user(frames, _frames))
2657 return -EFAULT;
2658 if (put_user(0, _frames))
2659 return -EFAULT;
2660 result = snd_pcm_playback_rewind(substream, frames);
2661 __put_user(result, _frames);
2662 return result < 0 ? result : 0;
2663 }
2664 case SNDRV_PCM_IOCTL_FORWARD:
2665 {
2666 snd_pcm_uframes_t frames;
2667 snd_pcm_uframes_t __user *_frames = arg;
2668 snd_pcm_sframes_t result;
2669 if (get_user(frames, _frames))
2670 return -EFAULT;
2671 if (put_user(0, _frames))
2672 return -EFAULT;
2673 result = snd_pcm_playback_forward(substream, frames);
2674 __put_user(result, _frames);
2675 return result < 0 ? result : 0;
2676 }
2677 }
2678 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2679 }
2680
2681 static int snd_pcm_capture_ioctl1(struct file *file,
2682 struct snd_pcm_substream *substream,
2683 unsigned int cmd, void __user *arg)
2684 {
2685 snd_assert(substream != NULL, return -ENXIO);
2686 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2687 switch (cmd) {
2688 case SNDRV_PCM_IOCTL_READI_FRAMES:
2689 {
2690 struct snd_xferi xferi;
2691 struct snd_xferi __user *_xferi = arg;
2692 struct snd_pcm_runtime *runtime = substream->runtime;
2693 snd_pcm_sframes_t result;
2694 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2695 return -EBADFD;
2696 if (put_user(0, &_xferi->result))
2697 return -EFAULT;
2698 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2699 return -EFAULT;
2700 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2701 __put_user(result, &_xferi->result);
2702 return result < 0 ? result : 0;
2703 }
2704 case SNDRV_PCM_IOCTL_READN_FRAMES:
2705 {
2706 struct snd_xfern xfern;
2707 struct snd_xfern __user *_xfern = arg;
2708 struct snd_pcm_runtime *runtime = substream->runtime;
2709 void *bufs;
2710 snd_pcm_sframes_t result;
2711 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2712 return -EBADFD;
2713 if (runtime->channels > 128)
2714 return -EINVAL;
2715 if (put_user(0, &_xfern->result))
2716 return -EFAULT;
2717 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2718 return -EFAULT;
2719 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2720 if (bufs == NULL)
2721 return -ENOMEM;
2722 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2723 kfree(bufs);
2724 return -EFAULT;
2725 }
2726 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2727 kfree(bufs);
2728 __put_user(result, &_xfern->result);
2729 return result < 0 ? result : 0;
2730 }
2731 case SNDRV_PCM_IOCTL_REWIND:
2732 {
2733 snd_pcm_uframes_t frames;
2734 snd_pcm_uframes_t __user *_frames = arg;
2735 snd_pcm_sframes_t result;
2736 if (get_user(frames, _frames))
2737 return -EFAULT;
2738 if (put_user(0, _frames))
2739 return -EFAULT;
2740 result = snd_pcm_capture_rewind(substream, frames);
2741 __put_user(result, _frames);
2742 return result < 0 ? result : 0;
2743 }
2744 case SNDRV_PCM_IOCTL_FORWARD:
2745 {
2746 snd_pcm_uframes_t frames;
2747 snd_pcm_uframes_t __user *_frames = arg;
2748 snd_pcm_sframes_t result;
2749 if (get_user(frames, _frames))
2750 return -EFAULT;
2751 if (put_user(0, _frames))
2752 return -EFAULT;
2753 result = snd_pcm_capture_forward(substream, frames);
2754 __put_user(result, _frames);
2755 return result < 0 ? result : 0;
2756 }
2757 }
2758 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2759 }
2760
2761 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2762 unsigned long arg)
2763 {
2764 struct snd_pcm_file *pcm_file;
2765
2766 pcm_file = file->private_data;
2767
2768 if (((cmd >> 8) & 0xff) != 'A')
2769 return -ENOTTY;
2770
2771 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2772 (void __user *)arg);
2773 }
2774
2775 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2776 unsigned long arg)
2777 {
2778 struct snd_pcm_file *pcm_file;
2779
2780 pcm_file = file->private_data;
2781
2782 if (((cmd >> 8) & 0xff) != 'A')
2783 return -ENOTTY;
2784
2785 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2786 (void __user *)arg);
2787 }
2788
2789 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2790 unsigned int cmd, void *arg)
2791 {
2792 mm_segment_t fs;
2793 int result;
2794
2795 fs = snd_enter_user();
2796 switch (substream->stream) {
2797 case SNDRV_PCM_STREAM_PLAYBACK:
2798 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2799 (void __user *)arg);
2800 break;
2801 case SNDRV_PCM_STREAM_CAPTURE:
2802 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2803 (void __user *)arg);
2804 break;
2805 default:
2806 result = -EINVAL;
2807 break;
2808 }
2809 snd_leave_user(fs);
2810 return result;
2811 }
2812
2813 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2814
2815 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2816 loff_t * offset)
2817 {
2818 struct snd_pcm_file *pcm_file;
2819 struct snd_pcm_substream *substream;
2820 struct snd_pcm_runtime *runtime;
2821 snd_pcm_sframes_t result;
2822
2823 pcm_file = file->private_data;
2824 substream = pcm_file->substream;
2825 snd_assert(substream != NULL, return -ENXIO);
2826 runtime = substream->runtime;
2827 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2828 return -EBADFD;
2829 if (!frame_aligned(runtime, count))
2830 return -EINVAL;
2831 count = bytes_to_frames(runtime, count);
2832 result = snd_pcm_lib_read(substream, buf, count);
2833 if (result > 0)
2834 result = frames_to_bytes(runtime, result);
2835 return result;
2836 }
2837
2838 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2839 size_t count, loff_t * offset)
2840 {
2841 struct snd_pcm_file *pcm_file;
2842 struct snd_pcm_substream *substream;
2843 struct snd_pcm_runtime *runtime;
2844 snd_pcm_sframes_t result;
2845
2846 pcm_file = file->private_data;
2847 substream = pcm_file->substream;
2848 snd_assert(substream != NULL, result = -ENXIO; goto end);
2849 runtime = substream->runtime;
2850 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2851 result = -EBADFD;
2852 goto end;
2853 }
2854 if (!frame_aligned(runtime, count)) {
2855 result = -EINVAL;
2856 goto end;
2857 }
2858 count = bytes_to_frames(runtime, count);
2859 result = snd_pcm_lib_write(substream, buf, count);
2860 if (result > 0)
2861 result = frames_to_bytes(runtime, result);
2862 end:
2863 return result;
2864 }
2865
2866 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2867 unsigned long count, loff_t * offset)
2868
2869 {
2870 struct snd_pcm_file *pcm_file;
2871 struct snd_pcm_substream *substream;
2872 struct snd_pcm_runtime *runtime;
2873 snd_pcm_sframes_t result;
2874 unsigned long i;
2875 void __user **bufs;
2876 snd_pcm_uframes_t frames;
2877
2878 pcm_file = file->private_data;
2879 substream = pcm_file->substream;
2880 snd_assert(substream != NULL, return -ENXIO);
2881 runtime = substream->runtime;
2882 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2883 return -EBADFD;
2884 if (count > 1024 || count != runtime->channels)
2885 return -EINVAL;
2886 if (!frame_aligned(runtime, _vector->iov_len))
2887 return -EINVAL;
2888 frames = bytes_to_samples(runtime, _vector->iov_len);
2889 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2890 if (bufs == NULL)
2891 return -ENOMEM;
2892 for (i = 0; i < count; ++i)
2893 bufs[i] = _vector[i].iov_base;
2894 result = snd_pcm_lib_readv(substream, bufs, frames);
2895 if (result > 0)
2896 result = frames_to_bytes(runtime, result);
2897 kfree(bufs);
2898 return result;
2899 }
2900
2901 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2902 unsigned long count, loff_t * offset)
2903 {
2904 struct snd_pcm_file *pcm_file;
2905 struct snd_pcm_substream *substream;
2906 struct snd_pcm_runtime *runtime;
2907 snd_pcm_sframes_t result;
2908 unsigned long i;
2909 void __user **bufs;
2910 snd_pcm_uframes_t frames;
2911
2912 pcm_file = file->private_data;
2913 substream = pcm_file->substream;
2914 snd_assert(substream != NULL, result = -ENXIO; goto end);
2915 runtime = substream->runtime;
2916 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2917 result = -EBADFD;
2918 goto end;
2919 }
2920 if (count > 128 || count != runtime->channels ||
2921 !frame_aligned(runtime, _vector->iov_len)) {
2922 result = -EINVAL;
2923 goto end;
2924 }
2925 frames = bytes_to_samples(runtime, _vector->iov_len);
2926 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2927 if (bufs == NULL)
2928 return -ENOMEM;
2929 for (i = 0; i < count; ++i)
2930 bufs[i] = _vector[i].iov_base;
2931 result = snd_pcm_lib_writev(substream, bufs, frames);
2932 if (result > 0)
2933 result = frames_to_bytes(runtime, result);
2934 kfree(bufs);
2935 end:
2936 return result;
2937 }
2938
2939 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2940 {
2941 struct snd_pcm_file *pcm_file;
2942 struct snd_pcm_substream *substream;
2943 struct snd_pcm_runtime *runtime;
2944 unsigned int mask;
2945 snd_pcm_uframes_t avail;
2946
2947 pcm_file = file->private_data;
2948
2949 substream = pcm_file->substream;
2950 snd_assert(substream != NULL, return -ENXIO);
2951 runtime = substream->runtime;
2952
2953 poll_wait(file, &runtime->sleep, wait);
2954
2955 snd_pcm_stream_lock_irq(substream);
2956 avail = snd_pcm_playback_avail(runtime);
2957 switch (runtime->status->state) {
2958 case SNDRV_PCM_STATE_RUNNING:
2959 case SNDRV_PCM_STATE_PREPARED:
2960 case SNDRV_PCM_STATE_PAUSED:
2961 if (avail >= runtime->control->avail_min) {
2962 mask = POLLOUT | POLLWRNORM;
2963 break;
2964 }
2965 /* Fall through */
2966 case SNDRV_PCM_STATE_DRAINING:
2967 mask = 0;
2968 break;
2969 default:
2970 mask = POLLOUT | POLLWRNORM | POLLERR;
2971 break;
2972 }
2973 snd_pcm_stream_unlock_irq(substream);
2974 return mask;
2975 }
2976
2977 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2978 {
2979 struct snd_pcm_file *pcm_file;
2980 struct snd_pcm_substream *substream;
2981 struct snd_pcm_runtime *runtime;
2982 unsigned int mask;
2983 snd_pcm_uframes_t avail;
2984
2985 pcm_file = file->private_data;
2986
2987 substream = pcm_file->substream;
2988 snd_assert(substream != NULL, return -ENXIO);
2989 runtime = substream->runtime;
2990
2991 poll_wait(file, &runtime->sleep, wait);
2992
2993 snd_pcm_stream_lock_irq(substream);
2994 avail = snd_pcm_capture_avail(runtime);
2995 switch (runtime->status->state) {
2996 case SNDRV_PCM_STATE_RUNNING:
2997 case SNDRV_PCM_STATE_PREPARED:
2998 case SNDRV_PCM_STATE_PAUSED:
2999 if (avail >= runtime->control->avail_min) {
3000 mask = POLLIN | POLLRDNORM;
3001 break;
3002 }
3003 mask = 0;
3004 break;
3005 case SNDRV_PCM_STATE_DRAINING:
3006 if (avail > 0) {
3007 mask = POLLIN | POLLRDNORM;
3008 break;
3009 }
3010 /* Fall through */
3011 default:
3012 mask = POLLIN | POLLRDNORM | POLLERR;
3013 break;
3014 }
3015 snd_pcm_stream_unlock_irq(substream);
3016 return mask;
3017 }
3018
3019 /*
3020 * mmap support
3021 */
3022
3023 /*
3024 * Only on coherent architectures, we can mmap the status and the control records
3025 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3026 */
3027 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3028 /*
3029 * mmap status record
3030 */
3031 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3032 unsigned long address, int *type)
3033 {
3034 struct snd_pcm_substream *substream = area->vm_private_data;
3035 struct snd_pcm_runtime *runtime;
3036 struct page * page;
3037
3038 if (substream == NULL)
3039 return NOPAGE_OOM;
3040 runtime = substream->runtime;
3041 page = virt_to_page(runtime->status);
3042 get_page(page);
3043 if (type)
3044 *type = VM_FAULT_MINOR;
3045 return page;
3046 }
3047
3048 static struct vm_operations_struct snd_pcm_vm_ops_status =
3049 {
3050 .nopage = snd_pcm_mmap_status_nopage,
3051 };
3052
3053 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3054 struct vm_area_struct *area)
3055 {
3056 struct snd_pcm_runtime *runtime;
3057 long size;
3058 if (!(area->vm_flags & VM_READ))
3059 return -EINVAL;
3060 runtime = substream->runtime;
3061 snd_assert(runtime != NULL, return -EAGAIN);
3062 size = area->vm_end - area->vm_start;
3063 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3064 return -EINVAL;
3065 area->vm_ops = &snd_pcm_vm_ops_status;
3066 area->vm_private_data = substream;
3067 area->vm_flags |= VM_RESERVED;
3068 return 0;
3069 }
3070
3071 /*
3072 * mmap control record
3073 */
3074 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3075 unsigned long address, int *type)
3076 {
3077 struct snd_pcm_substream *substream = area->vm_private_data;
3078 struct snd_pcm_runtime *runtime;
3079 struct page * page;
3080
3081 if (substream == NULL)
3082 return NOPAGE_OOM;
3083 runtime = substream->runtime;
3084 page = virt_to_page(runtime->control);
3085 get_page(page);
3086 if (type)
3087 *type = VM_FAULT_MINOR;
3088 return page;
3089 }
3090
3091 static struct vm_operations_struct snd_pcm_vm_ops_control =
3092 {
3093 .nopage = snd_pcm_mmap_control_nopage,
3094 };
3095
3096 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3097 struct vm_area_struct *area)
3098 {
3099 struct snd_pcm_runtime *runtime;
3100 long size;
3101 if (!(area->vm_flags & VM_READ))
3102 return -EINVAL;
3103 runtime = substream->runtime;
3104 snd_assert(runtime != NULL, return -EAGAIN);
3105 size = area->vm_end - area->vm_start;
3106 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3107 return -EINVAL;
3108 area->vm_ops = &snd_pcm_vm_ops_control;
3109 area->vm_private_data = substream;
3110 area->vm_flags |= VM_RESERVED;
3111 return 0;
3112 }
3113 #else /* ! coherent mmap */
3114 /*
3115 * don't support mmap for status and control records.
3116 */
3117 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3118 struct vm_area_struct *area)
3119 {
3120 return -ENXIO;
3121 }
3122 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3123 struct vm_area_struct *area)
3124 {
3125 return -ENXIO;
3126 }
3127 #endif /* coherent mmap */
3128
3129 /*
3130 * nopage callback for mmapping a RAM page
3131 */
3132 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3133 unsigned long address, int *type)
3134 {
3135 struct snd_pcm_substream *substream = area->vm_private_data;
3136 struct snd_pcm_runtime *runtime;
3137 unsigned long offset;
3138 struct page * page;
3139 void *vaddr;
3140 size_t dma_bytes;
3141
3142 if (substream == NULL)
3143 return NOPAGE_OOM;
3144 runtime = substream->runtime;
3145 offset = area->vm_pgoff << PAGE_SHIFT;
3146 offset += address - area->vm_start;
3147 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3148 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3149 if (offset > dma_bytes - PAGE_SIZE)
3150 return NOPAGE_SIGBUS;
3151 if (substream->ops->page) {
3152 page = substream->ops->page(substream, offset);
3153 if (! page)
3154 return NOPAGE_OOM;
3155 } else {
3156 vaddr = runtime->dma_area + offset;
3157 page = virt_to_page(vaddr);
3158 }
3159 get_page(page);
3160 if (type)
3161 *type = VM_FAULT_MINOR;
3162 return page;
3163 }
3164
3165 static struct vm_operations_struct snd_pcm_vm_ops_data =
3166 {
3167 .open = snd_pcm_mmap_data_open,
3168 .close = snd_pcm_mmap_data_close,
3169 .nopage = snd_pcm_mmap_data_nopage,
3170 };
3171
3172 /*
3173 * mmap the DMA buffer on RAM
3174 */
3175 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3176 struct vm_area_struct *area)
3177 {
3178 area->vm_ops = &snd_pcm_vm_ops_data;
3179 area->vm_private_data = substream;
3180 area->vm_flags |= VM_RESERVED;
3181 atomic_inc(&substream->runtime->mmap_count);
3182 return 0;
3183 }
3184
3185 /*
3186 * mmap the DMA buffer on I/O memory area
3187 */
3188 #if SNDRV_PCM_INFO_MMAP_IOMEM
3189 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3190 {
3191 .open = snd_pcm_mmap_data_open,
3192 .close = snd_pcm_mmap_data_close,
3193 };
3194
3195 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3196 struct vm_area_struct *area)
3197 {
3198 long size;
3199 unsigned long offset;
3200
3201 #ifdef pgprot_noncached
3202 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3203 #endif
3204 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3205 area->vm_private_data = substream;
3206 area->vm_flags |= VM_IO;
3207 size = area->vm_end - area->vm_start;
3208 offset = area->vm_pgoff << PAGE_SHIFT;
3209 if (io_remap_pfn_range(area, area->vm_start,
3210 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3211 size, area->vm_page_prot))
3212 return -EAGAIN;
3213 atomic_inc(&substream->runtime->mmap_count);
3214 return 0;
3215 }
3216
3217 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3218 #endif /* SNDRV_PCM_INFO_MMAP */
3219
3220 /*
3221 * mmap DMA buffer
3222 */
3223 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3224 struct vm_area_struct *area)
3225 {
3226 struct snd_pcm_runtime *runtime;
3227 long size;
3228 unsigned long offset;
3229 size_t dma_bytes;
3230
3231 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3232 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3233 return -EINVAL;
3234 } else {
3235 if (!(area->vm_flags & VM_READ))
3236 return -EINVAL;
3237 }
3238 runtime = substream->runtime;
3239 snd_assert(runtime != NULL, return -EAGAIN);
3240 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3241 return -EBADFD;
3242 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3243 return -ENXIO;
3244 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3245 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3246 return -EINVAL;
3247 size = area->vm_end - area->vm_start;
3248 offset = area->vm_pgoff << PAGE_SHIFT;
3249 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3250 if ((size_t)size > dma_bytes)
3251 return -EINVAL;
3252 if (offset > dma_bytes - size)
3253 return -EINVAL;
3254
3255 if (substream->ops->mmap)
3256 return substream->ops->mmap(substream, area);
3257 else
3258 return snd_pcm_default_mmap(substream, area);
3259 }
3260
3261 EXPORT_SYMBOL(snd_pcm_mmap_data);
3262
3263 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3264 {
3265 struct snd_pcm_file * pcm_file;
3266 struct snd_pcm_substream *substream;
3267 unsigned long offset;
3268
3269 pcm_file = file->private_data;
3270 substream = pcm_file->substream;
3271 snd_assert(substream != NULL, return -ENXIO);
3272
3273 offset = area->vm_pgoff << PAGE_SHIFT;
3274 switch (offset) {
3275 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3276 if (substream->no_mmap_ctrl)
3277 return -ENXIO;
3278 return snd_pcm_mmap_status(substream, file, area);
3279 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3280 if (substream->no_mmap_ctrl)
3281 return -ENXIO;
3282 return snd_pcm_mmap_control(substream, file, area);
3283 default:
3284 return snd_pcm_mmap_data(substream, file, area);
3285 }
3286 return 0;
3287 }
3288
3289 static int snd_pcm_fasync(int fd, struct file * file, int on)
3290 {
3291 struct snd_pcm_file * pcm_file;
3292 struct snd_pcm_substream *substream;
3293 struct snd_pcm_runtime *runtime;
3294 int err;
3295
3296 pcm_file = file->private_data;
3297 substream = pcm_file->substream;
3298 snd_assert(substream != NULL, return -ENXIO);
3299 runtime = substream->runtime;
3300
3301 err = fasync_helper(fd, file, on, &runtime->fasync);
3302 if (err < 0)
3303 return err;
3304 return 0;
3305 }
3306
3307 /*
3308 * ioctl32 compat
3309 */
3310 #ifdef CONFIG_COMPAT
3311 #include "pcm_compat.c"
3312 #else
3313 #define snd_pcm_ioctl_compat NULL
3314 #endif
3315
3316 /*
3317 * To be removed helpers to keep binary compatibility
3318 */
3319
3320 #ifdef CONFIG_SND_SUPPORT_OLD_API
3321 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3322 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3323
3324 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3325 struct snd_pcm_hw_params_old *oparams)
3326 {
3327 unsigned int i;
3328
3329 memset(params, 0, sizeof(*params));
3330 params->flags = oparams->flags;
3331 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3332 params->masks[i].bits[0] = oparams->masks[i];
3333 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3334 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3335 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3336 params->info = oparams->info;
3337 params->msbits = oparams->msbits;
3338 params->rate_num = oparams->rate_num;
3339 params->rate_den = oparams->rate_den;
3340 params->fifo_size = oparams->fifo_size;
3341 }
3342
3343 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3344 struct snd_pcm_hw_params *params)
3345 {
3346 unsigned int i;
3347
3348 memset(oparams, 0, sizeof(*oparams));
3349 oparams->flags = params->flags;
3350 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3351 oparams->masks[i] = params->masks[i].bits[0];
3352 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3353 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3354 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3355 oparams->info = params->info;
3356 oparams->msbits = params->msbits;
3357 oparams->rate_num = params->rate_num;
3358 oparams->rate_den = params->rate_den;
3359 oparams->fifo_size = params->fifo_size;
3360 }
3361
3362 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3363 struct snd_pcm_hw_params_old __user * _oparams)
3364 {
3365 struct snd_pcm_hw_params *params;
3366 struct snd_pcm_hw_params_old *oparams = NULL;
3367 int err;
3368
3369 params = kmalloc(sizeof(*params), GFP_KERNEL);
3370 if (!params) {
3371 err = -ENOMEM;
3372 goto out;
3373 }
3374 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3375 if (!oparams) {
3376 err = -ENOMEM;
3377 goto out;
3378 }
3379
3380 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3381 err = -EFAULT;
3382 goto out;
3383 }
3384 snd_pcm_hw_convert_from_old_params(params, oparams);
3385 err = snd_pcm_hw_refine(substream, params);
3386 snd_pcm_hw_convert_to_old_params(oparams, params);
3387 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3388 if (!err)
3389 err = -EFAULT;
3390 }
3391 out:
3392 kfree(params);
3393 kfree(oparams);
3394 return err;
3395 }
3396
3397 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3398 struct snd_pcm_hw_params_old __user * _oparams)
3399 {
3400 struct snd_pcm_hw_params *params;
3401 struct snd_pcm_hw_params_old *oparams = NULL;
3402 int err;
3403
3404 params = kmalloc(sizeof(*params), GFP_KERNEL);
3405 if (!params) {
3406 err = -ENOMEM;
3407 goto out;
3408 }
3409 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3410 if (!oparams) {
3411 err = -ENOMEM;
3412 goto out;
3413 }
3414 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3415 err = -EFAULT;
3416 goto out;
3417 }
3418 snd_pcm_hw_convert_from_old_params(params, oparams);
3419 err = snd_pcm_hw_params(substream, params);
3420 snd_pcm_hw_convert_to_old_params(oparams, params);
3421 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3422 if (!err)
3423 err = -EFAULT;
3424 }
3425 out:
3426 kfree(params);
3427 kfree(oparams);
3428 return err;
3429 }
3430 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3431
3432 /*
3433 * Register section
3434 */
3435
3436 struct file_operations snd_pcm_f_ops[2] = {
3437 {
3438 .owner = THIS_MODULE,
3439 .write = snd_pcm_write,
3440 .writev = snd_pcm_writev,
3441 .open = snd_pcm_playback_open,
3442 .release = snd_pcm_release,
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 },
3449 {
3450 .owner = THIS_MODULE,
3451 .read = snd_pcm_read,
3452 .readv = snd_pcm_readv,
3453 .open = snd_pcm_capture_open,
3454 .release = snd_pcm_release,
3455 .poll = snd_pcm_capture_poll,
3456 .unlocked_ioctl = snd_pcm_capture_ioctl,
3457 .compat_ioctl = snd_pcm_ioctl_compat,
3458 .mmap = snd_pcm_mmap,
3459 .fasync = snd_pcm_fasync,
3460 }
3461 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree