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[ALSA] Remove xxx_t typedefs: Proc handler
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#include <sound/driver.h>
23#include <linux/mm.h>
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
42struct sndrv_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 sndrv_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 sndrv_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56};
57
58#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct sndrv_pcm_hw_params_old)
59#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct sndrv_pcm_hw_params_old)
60
61static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams);
62static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams);
63
64/*
65 *
66 */
67
68DEFINE_RWLOCK(snd_pcm_link_rwlock);
69static DECLARE_RWSEM(snd_pcm_link_rwsem);
70
71
72static inline mm_segment_t snd_enter_user(void)
73{
74 mm_segment_t fs = get_fs();
75 set_fs(get_ds());
76 return fs;
77}
78
79static inline void snd_leave_user(mm_segment_t fs)
80{
81 set_fs(fs);
82}
83
84
85
86int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info)
87{
88 snd_pcm_runtime_t * runtime;
89 snd_pcm_t *pcm = substream->pcm;
90 snd_pcm_str_t *pstr = substream->pstr;
91
92 snd_assert(substream != NULL, return -ENXIO);
93 memset(info, 0, sizeof(*info));
94 info->card = pcm->card->number;
95 info->device = pcm->device;
96 info->stream = substream->stream;
97 info->subdevice = substream->number;
98 strlcpy(info->id, pcm->id, sizeof(info->id));
99 strlcpy(info->name, pcm->name, sizeof(info->name));
100 info->dev_class = pcm->dev_class;
101 info->dev_subclass = pcm->dev_subclass;
102 info->subdevices_count = pstr->substream_count;
103 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
104 strlcpy(info->subname, substream->name, sizeof(info->subname));
105 runtime = substream->runtime;
106 /* AB: FIXME!!! This is definitely nonsense */
107 if (runtime) {
108 info->sync = runtime->sync;
109 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
110 }
111 return 0;
112}
113
114int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user * _info)
115{
116 snd_pcm_info_t *info;
117 int err;
118
119 info = kmalloc(sizeof(*info), GFP_KERNEL);
120 if (! info)
121 return -ENOMEM;
122 err = snd_pcm_info(substream, info);
123 if (err >= 0) {
124 if (copy_to_user(_info, info, sizeof(*info)))
125 err = -EFAULT;
126 }
127 kfree(info);
128 return err;
129}
130
131#undef RULES_DEBUG
132
133#ifdef RULES_DEBUG
134#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
135char *snd_pcm_hw_param_names[] = {
136 HW_PARAM(ACCESS),
137 HW_PARAM(FORMAT),
138 HW_PARAM(SUBFORMAT),
139 HW_PARAM(SAMPLE_BITS),
140 HW_PARAM(FRAME_BITS),
141 HW_PARAM(CHANNELS),
142 HW_PARAM(RATE),
143 HW_PARAM(PERIOD_TIME),
144 HW_PARAM(PERIOD_SIZE),
145 HW_PARAM(PERIOD_BYTES),
146 HW_PARAM(PERIODS),
147 HW_PARAM(BUFFER_TIME),
148 HW_PARAM(BUFFER_SIZE),
149 HW_PARAM(BUFFER_BYTES),
150 HW_PARAM(TICK_TIME),
151};
152#endif
153
154int snd_pcm_hw_refine(snd_pcm_substream_t *substream,
155 snd_pcm_hw_params_t *params)
156{
157 unsigned int k;
158 snd_pcm_hardware_t *hw;
159 snd_interval_t *i = NULL;
160 snd_mask_t *m = NULL;
161 snd_pcm_hw_constraints_t *constrs = &substream->runtime->hw_constraints;
162 unsigned int rstamps[constrs->rules_num];
163 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
164 unsigned int stamp = 2;
165 int changed, again;
166
167 params->info = 0;
168 params->fifo_size = 0;
169 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
170 params->msbits = 0;
171 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
172 params->rate_num = 0;
173 params->rate_den = 0;
174 }
175
176 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
177 m = hw_param_mask(params, k);
178 if (snd_mask_empty(m))
179 return -EINVAL;
180 if (!(params->rmask & (1 << k)))
181 continue;
182#ifdef RULES_DEBUG
183 printk("%s = ", snd_pcm_hw_param_names[k]);
184 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
185#endif
186 changed = snd_mask_refine(m, constrs_mask(constrs, k));
187#ifdef RULES_DEBUG
188 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
189#endif
190 if (changed)
191 params->cmask |= 1 << k;
192 if (changed < 0)
193 return changed;
194 }
195
196 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
197 i = hw_param_interval(params, k);
198 if (snd_interval_empty(i))
199 return -EINVAL;
200 if (!(params->rmask & (1 << k)))
201 continue;
202#ifdef RULES_DEBUG
203 printk("%s = ", snd_pcm_hw_param_names[k]);
204 if (i->empty)
205 printk("empty");
206 else
207 printk("%c%u %u%c",
208 i->openmin ? '(' : '[', i->min,
209 i->max, i->openmax ? ')' : ']');
210 printk(" -> ");
211#endif
212 changed = snd_interval_refine(i, constrs_interval(constrs, k));
213#ifdef RULES_DEBUG
214 if (i->empty)
215 printk("empty\n");
216 else
217 printk("%c%u %u%c\n",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220#endif
221 if (changed)
222 params->cmask |= 1 << k;
223 if (changed < 0)
224 return changed;
225 }
226
227 for (k = 0; k < constrs->rules_num; k++)
228 rstamps[k] = 0;
229 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
230 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
231 do {
232 again = 0;
233 for (k = 0; k < constrs->rules_num; k++) {
234 snd_pcm_hw_rule_t *r = &constrs->rules[k];
235 unsigned int d;
236 int doit = 0;
237 if (r->cond && !(r->cond & params->flags))
238 continue;
239 for (d = 0; r->deps[d] >= 0; d++) {
240 if (vstamps[r->deps[d]] > rstamps[k]) {
241 doit = 1;
242 break;
243 }
244 }
245 if (!doit)
246 continue;
247#ifdef RULES_DEBUG
248 printk("Rule %d [%p]: ", k, r->func);
249 if (r->var >= 0) {
250 printk("%s = ", snd_pcm_hw_param_names[r->var]);
251 if (hw_is_mask(r->var)) {
252 m = hw_param_mask(params, r->var);
253 printk("%x", *m->bits);
254 } else {
255 i = hw_param_interval(params, r->var);
256 if (i->empty)
257 printk("empty");
258 else
259 printk("%c%u %u%c",
260 i->openmin ? '(' : '[', i->min,
261 i->max, i->openmax ? ')' : ']');
262 }
263 }
264#endif
265 changed = r->func(params, r);
266#ifdef RULES_DEBUG
267 if (r->var >= 0) {
268 printk(" -> ");
269 if (hw_is_mask(r->var))
270 printk("%x", *m->bits);
271 else {
272 if (i->empty)
273 printk("empty");
274 else
275 printk("%c%u %u%c",
276 i->openmin ? '(' : '[', i->min,
277 i->max, i->openmax ? ')' : ']');
278 }
279 }
280 printk("\n");
281#endif
282 rstamps[k] = stamp;
283 if (changed && r->var >= 0) {
284 params->cmask |= (1 << r->var);
285 vstamps[r->var] = stamp;
286 again = 1;
287 }
288 if (changed < 0)
289 return changed;
290 stamp++;
291 }
292 } while (again);
293 if (!params->msbits) {
294 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
295 if (snd_interval_single(i))
296 params->msbits = snd_interval_value(i);
297 }
298
299 if (!params->rate_den) {
300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
301 if (snd_interval_single(i)) {
302 params->rate_num = snd_interval_value(i);
303 params->rate_den = 1;
304 }
305 }
306
307 hw = &substream->runtime->hw;
308 if (!params->info)
309 params->info = hw->info;
310 if (!params->fifo_size)
311 params->fifo_size = hw->fifo_size;
312 params->rmask = 0;
313 return 0;
314}
315
316static int snd_pcm_hw_refine_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params)
317{
318 snd_pcm_hw_params_t *params;
319 int err;
320
321 params = kmalloc(sizeof(*params), GFP_KERNEL);
322 if (!params) {
323 err = -ENOMEM;
324 goto out;
325 }
326 if (copy_from_user(params, _params, sizeof(*params))) {
327 err = -EFAULT;
328 goto out;
329 }
330 err = snd_pcm_hw_refine(substream, params);
331 if (copy_to_user(_params, params, sizeof(*params))) {
332 if (!err)
333 err = -EFAULT;
334 }
335out:
336 kfree(params);
337 return err;
338}
339
123992f7
AB		 340static int snd_pcm_hw_params(snd_pcm_substream_t *substream,
341 snd_pcm_hw_params_t *params)
1da177e4
LT		 342{
343 snd_pcm_runtime_t *runtime;
344 int err;
345 unsigned int bits;
346 snd_pcm_uframes_t frames;
347
348 snd_assert(substream != NULL, return -ENXIO);
349 runtime = substream->runtime;
350 snd_assert(runtime != NULL, return -ENXIO);
351 snd_pcm_stream_lock_irq(substream);
352 switch (runtime->status->state) {
353 case SNDRV_PCM_STATE_OPEN:
354 case SNDRV_PCM_STATE_SETUP:
355 case SNDRV_PCM_STATE_PREPARED:
356 break;
357 default:
358 snd_pcm_stream_unlock_irq(substream);
359 return -EBADFD;
360 }
361 snd_pcm_stream_unlock_irq(substream);
362#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
363 if (!substream->oss.oss)
364#endif
365 if (atomic_read(&runtime->mmap_count))
366 return -EBADFD;
367
368 params->rmask = ~0U;
369 err = snd_pcm_hw_refine(substream, params);
370 if (err < 0)
371 goto _error;
372
373 err = snd_pcm_hw_params_choose(substream, params);
374 if (err < 0)
375 goto _error;
376
377 if (substream->ops->hw_params != NULL) {
378 err = substream->ops->hw_params(substream, params);
379 if (err < 0)
380 goto _error;
381 }
382
383 runtime->access = params_access(params);
384 runtime->format = params_format(params);
385 runtime->subformat = params_subformat(params);
386 runtime->channels = params_channels(params);
387 runtime->rate = params_rate(params);
388 runtime->period_size = params_period_size(params);
389 runtime->periods = params_periods(params);
390 runtime->buffer_size = params_buffer_size(params);
391 runtime->tick_time = params_tick_time(params);
392 runtime->info = params->info;
393 runtime->rate_num = params->rate_num;
394 runtime->rate_den = params->rate_den;
395
396 bits = snd_pcm_format_physical_width(runtime->format);
397 runtime->sample_bits = bits;
398 bits *= runtime->channels;
399 runtime->frame_bits = bits;
400 frames = 1;
401 while (bits % 8 != 0) {
402 bits *= 2;
403 frames *= 2;
404 }
405 runtime->byte_align = bits / 8;
406 runtime->min_align = frames;
407
408 /* Default sw params */
409 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
410 runtime->period_step = 1;
411 runtime->sleep_min = 0;
412 runtime->control->avail_min = runtime->period_size;
413 runtime->xfer_align = runtime->period_size;
414 runtime->start_threshold = 1;
415 runtime->stop_threshold = runtime->buffer_size;
416 runtime->silence_threshold = 0;
417 runtime->silence_size = 0;
418 runtime->boundary = runtime->buffer_size;
419 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
420 runtime->boundary *= 2;
421
422 snd_pcm_timer_resolution_change(substream);
423 runtime->status->state = SNDRV_PCM_STATE_SETUP;
424 return 0;
425 _error:
426 /* hardware might be unuseable from this time,
427 so we force application to retry to set
428 the correct hardware parameter settings */
429 runtime->status->state = SNDRV_PCM_STATE_OPEN;
430 if (substream->ops->hw_free != NULL)
431 substream->ops->hw_free(substream);
432 return err;
433}
434
435static int snd_pcm_hw_params_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params)
436{
437 snd_pcm_hw_params_t *params;
438 int err;
439
440 params = kmalloc(sizeof(*params), GFP_KERNEL);
441 if (!params) {
442 err = -ENOMEM;
443 goto out;
444 }
445 if (copy_from_user(params, _params, sizeof(*params))) {
446 err = -EFAULT;
447 goto out;
448 }
449 err = snd_pcm_hw_params(substream, params);
450 if (copy_to_user(_params, params, sizeof(*params))) {
451 if (!err)
452 err = -EFAULT;
453 }
454out:
455 kfree(params);
456 return err;
457}
458
459static int snd_pcm_hw_free(snd_pcm_substream_t * substream)
460{
461 snd_pcm_runtime_t *runtime;
462 int result = 0;
463
464 snd_assert(substream != NULL, return -ENXIO);
465 runtime = substream->runtime;
466 snd_assert(runtime != NULL, return -ENXIO);
467 snd_pcm_stream_lock_irq(substream);
468 switch (runtime->status->state) {
469 case SNDRV_PCM_STATE_SETUP:
470 case SNDRV_PCM_STATE_PREPARED:
471 break;
472 default:
473 snd_pcm_stream_unlock_irq(substream);
474 return -EBADFD;
475 }
476 snd_pcm_stream_unlock_irq(substream);
477 if (atomic_read(&runtime->mmap_count))
478 return -EBADFD;
479 if (substream->ops->hw_free)
480 result = substream->ops->hw_free(substream);
481 runtime->status->state = SNDRV_PCM_STATE_OPEN;
482 return result;
483}
484
485static int snd_pcm_sw_params(snd_pcm_substream_t * substream, snd_pcm_sw_params_t *params)
486{
487 snd_pcm_runtime_t *runtime;
488
489 snd_assert(substream != NULL, return -ENXIO);
490 runtime = substream->runtime;
491 snd_assert(runtime != NULL, return -ENXIO);
492 snd_pcm_stream_lock_irq(substream);
493 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
494 snd_pcm_stream_unlock_irq(substream);
495 return -EBADFD;
496 }
497 snd_pcm_stream_unlock_irq(substream);
498
499 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
500 return -EINVAL;
501 if (params->avail_min == 0)
502 return -EINVAL;
503 if (params->xfer_align == 0 ||
504 params->xfer_align % runtime->min_align != 0)
505 return -EINVAL;
506 if (params->silence_size >= runtime->boundary) {
507 if (params->silence_threshold != 0)
508 return -EINVAL;
509 } else {
510 if (params->silence_size > params->silence_threshold)
511 return -EINVAL;
512 if (params->silence_threshold > runtime->buffer_size)
513 return -EINVAL;
514 }
515 snd_pcm_stream_lock_irq(substream);
516 runtime->tstamp_mode = params->tstamp_mode;
517 runtime->sleep_min = params->sleep_min;
518 runtime->period_step = params->period_step;
519 runtime->control->avail_min = params->avail_min;
520 runtime->start_threshold = params->start_threshold;
521 runtime->stop_threshold = params->stop_threshold;
522 runtime->silence_threshold = params->silence_threshold;
523 runtime->silence_size = params->silence_size;
524 runtime->xfer_align = params->xfer_align;
525 params->boundary = runtime->boundary;
526 if (snd_pcm_running(substream)) {
527 if (runtime->sleep_min)
528 snd_pcm_tick_prepare(substream);
529 else
530 snd_pcm_tick_set(substream, 0);
531 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
532 runtime->silence_size > 0)
533 snd_pcm_playback_silence(substream, ULONG_MAX);
534 wake_up(&runtime->sleep);
535 }
536 snd_pcm_stream_unlock_irq(substream);
537 return 0;
538}
539
540static int snd_pcm_sw_params_user(snd_pcm_substream_t * substream, snd_pcm_sw_params_t __user * _params)
541{
542 snd_pcm_sw_params_t params;
543 int err;
544 if (copy_from_user(&params, _params, sizeof(params)))
545 return -EFAULT;
546 err = snd_pcm_sw_params(substream, &params);
547 if (copy_to_user(_params, &params, sizeof(params)))
548 return -EFAULT;
549 return err;
550}
551
552int snd_pcm_status(snd_pcm_substream_t *substream,
553 snd_pcm_status_t *status)
554{
555 snd_pcm_runtime_t *runtime = substream->runtime;
556
557 snd_pcm_stream_lock_irq(substream);
558 status->state = runtime->status->state;
559 status->suspended_state = runtime->status->suspended_state;
560 if (status->state == SNDRV_PCM_STATE_OPEN)
561 goto _end;
562 status->trigger_tstamp = runtime->trigger_tstamp;
563 if (snd_pcm_running(substream)) {
564 snd_pcm_update_hw_ptr(substream);
565 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
566 status->tstamp = runtime->status->tstamp;
567 else
07799e75 568 getnstimeofday(&status->tstamp);
1da177e4 569 } else
07799e75 570 getnstimeofday(&status->tstamp);
1da177e4
LT		 571 status->appl_ptr = runtime->control->appl_ptr;
572 status->hw_ptr = runtime->status->hw_ptr;
573 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
574 status->avail = snd_pcm_playback_avail(runtime);
575 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
576 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
577 status->delay = runtime->buffer_size - status->avail;
578 else
579 status->delay = 0;
580 } else {
581 status->avail = snd_pcm_capture_avail(runtime);
582 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
583 status->delay = status->avail;
584 else
585 status->delay = 0;
586 }
587 status->avail_max = runtime->avail_max;
588 status->overrange = runtime->overrange;
589 runtime->avail_max = 0;
590 runtime->overrange = 0;
591 _end:
592 snd_pcm_stream_unlock_irq(substream);
593 return 0;
594}
595
596static int snd_pcm_status_user(snd_pcm_substream_t * substream, snd_pcm_status_t __user * _status)
597{
598 snd_pcm_status_t status;
599 snd_pcm_runtime_t *runtime;
600 int res;
601
602 snd_assert(substream != NULL, return -ENXIO);
603 runtime = substream->runtime;
604 memset(&status, 0, sizeof(status));
605 res = snd_pcm_status(substream, &status);
606 if (res < 0)
607 return res;
608 if (copy_to_user(_status, &status, sizeof(status)))
609 return -EFAULT;
610 return 0;
611}
612
613static int snd_pcm_channel_info(snd_pcm_substream_t * substream, snd_pcm_channel_info_t * info)
614{
615 snd_pcm_runtime_t *runtime;
616 unsigned int channel;
617
618 snd_assert(substream != NULL, return -ENXIO);
619 channel = info->channel;
620 runtime = substream->runtime;
621 snd_pcm_stream_lock_irq(substream);
622 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
623 snd_pcm_stream_unlock_irq(substream);
624 return -EBADFD;
625 }
626 snd_pcm_stream_unlock_irq(substream);
627 if (channel >= runtime->channels)
628 return -EINVAL;
629 memset(info, 0, sizeof(*info));
630 info->channel = channel;
631 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
632}
633
634static int snd_pcm_channel_info_user(snd_pcm_substream_t * substream, snd_pcm_channel_info_t __user * _info)
635{
636 snd_pcm_channel_info_t info;
637 int res;
638
639 if (copy_from_user(&info, _info, sizeof(info)))
640 return -EFAULT;
641 res = snd_pcm_channel_info(substream, &info);
642 if (res < 0)
643 return res;
644 if (copy_to_user(_info, &info, sizeof(info)))
645 return -EFAULT;
646 return 0;
647}
648
649static void snd_pcm_trigger_tstamp(snd_pcm_substream_t *substream)
650{
651 snd_pcm_runtime_t *runtime = substream->runtime;
652 if (runtime->trigger_master == NULL)
653 return;
654 if (runtime->trigger_master == substream) {
07799e75 655 getnstimeofday(&runtime->trigger_tstamp);
1da177e4
LT		 656 } else {
657 snd_pcm_trigger_tstamp(runtime->trigger_master);
658 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
659 }
660 runtime->trigger_master = NULL;
661}
662
663struct action_ops {
664 int (*pre_action)(snd_pcm_substream_t *substream, int state);
665 int (*do_action)(snd_pcm_substream_t *substream, int state);
666 void (*undo_action)(snd_pcm_substream_t *substream, int state);
667 void (*post_action)(snd_pcm_substream_t *substream, int state);
668};
669
670/*
671 * this functions is core for handling of linked stream
672 * Note: the stream state might be changed also on failure
673 * Note2: call with calling stream lock + link lock
674 */
675static int snd_pcm_action_group(struct action_ops *ops,
676 snd_pcm_substream_t *substream,
677 int state, int do_lock)
678{
679 struct list_head *pos;
680 snd_pcm_substream_t *s = NULL;
681 snd_pcm_substream_t *s1;
682 int res = 0;
683
684 snd_pcm_group_for_each(pos, substream) {
685 s = snd_pcm_group_substream_entry(pos);
686 if (do_lock && s != substream)
687 spin_lock(&s->self_group.lock);
688 res = ops->pre_action(s, state);
689 if (res < 0)
690 goto _unlock;
691 }
692 snd_pcm_group_for_each(pos, substream) {
693 s = snd_pcm_group_substream_entry(pos);
694 res = ops->do_action(s, state);
695 if (res < 0) {
696 if (ops->undo_action) {
697 snd_pcm_group_for_each(pos, substream) {
698 s1 = snd_pcm_group_substream_entry(pos);
699 if (s1 == s) /* failed stream */
700 break;
701 ops->undo_action(s1, state);
702 }
703 }
704 s = NULL; /* unlock all */
705 goto _unlock;
706 }
707 }
708 snd_pcm_group_for_each(pos, substream) {
709 s = snd_pcm_group_substream_entry(pos);
710 ops->post_action(s, state);
711 }
712 _unlock:
713 if (do_lock) {
714 /* unlock streams */
715 snd_pcm_group_for_each(pos, substream) {
716 s1 = snd_pcm_group_substream_entry(pos);
717 if (s1 != substream)
718 spin_unlock(&s1->self_group.lock);
719 if (s1 == s) /* end */
720 break;
721 }
722 }
723 return res;
724}
725
726/*
727 * Note: call with stream lock
728 */
729static int snd_pcm_action_single(struct action_ops *ops,
730 snd_pcm_substream_t *substream,
731 int state)
732{
733 int res;
734
735 res = ops->pre_action(substream, state);
736 if (res < 0)
737 return res;
738 res = ops->do_action(substream, state);
739 if (res == 0)
740 ops->post_action(substream, state);
741 else if (ops->undo_action)
742 ops->undo_action(substream, state);
743 return res;
744}
745
746/*
747 * Note: call with stream lock
748 */
749static int snd_pcm_action(struct action_ops *ops,
750 snd_pcm_substream_t *substream,
751 int state)
752{
753 int res;
754
755 if (snd_pcm_stream_linked(substream)) {
756 if (!spin_trylock(&substream->group->lock)) {
757 spin_unlock(&substream->self_group.lock);
758 spin_lock(&substream->group->lock);
759 spin_lock(&substream->self_group.lock);
760 }
761 res = snd_pcm_action_group(ops, substream, state, 1);
762 spin_unlock(&substream->group->lock);
763 } else {
764 res = snd_pcm_action_single(ops, substream, state);
765 }
766 return res;
767}
768
769/*
770 * Note: don't use any locks before
771 */
772static int snd_pcm_action_lock_irq(struct action_ops *ops,
773 snd_pcm_substream_t *substream,
774 int state)
775{
776 int res;
777
778 read_lock_irq(&snd_pcm_link_rwlock);
779 if (snd_pcm_stream_linked(substream)) {
780 spin_lock(&substream->group->lock);
781 spin_lock(&substream->self_group.lock);
782 res = snd_pcm_action_group(ops, substream, state, 1);
783 spin_unlock(&substream->self_group.lock);
784 spin_unlock(&substream->group->lock);
785 } else {
786 spin_lock(&substream->self_group.lock);
787 res = snd_pcm_action_single(ops, substream, state);
788 spin_unlock(&substream->self_group.lock);
789 }
790 read_unlock_irq(&snd_pcm_link_rwlock);
791 return res;
792}
793
794/*
795 */
796static int snd_pcm_action_nonatomic(struct action_ops *ops,
797 snd_pcm_substream_t *substream,
798 int state)
799{
800 int res;
801
802 down_read(&snd_pcm_link_rwsem);
803 if (snd_pcm_stream_linked(substream))
804 res = snd_pcm_action_group(ops, substream, state, 0);
805 else
806 res = snd_pcm_action_single(ops, substream, state);
807 up_read(&snd_pcm_link_rwsem);
808 return res;
809}
810
811/*
812 * start callbacks
813 */
814static int snd_pcm_pre_start(snd_pcm_substream_t *substream, int state)
815{
816 snd_pcm_runtime_t *runtime = substream->runtime;
817 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
818 return -EBADFD;
819 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
820 !snd_pcm_playback_data(substream))
821 return -EPIPE;
822 runtime->trigger_master = substream;
823 return 0;
824}
825
826static int snd_pcm_do_start(snd_pcm_substream_t *substream, int state)
827{
828 if (substream->runtime->trigger_master != substream)
829 return 0;
830 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
831}
832
833static void snd_pcm_undo_start(snd_pcm_substream_t *substream, int state)
834{
835 if (substream->runtime->trigger_master == substream)
836 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
837}
838
839static void snd_pcm_post_start(snd_pcm_substream_t *substream, int state)
840{
841 snd_pcm_runtime_t *runtime = substream->runtime;
842 snd_pcm_trigger_tstamp(substream);
843 runtime->status->state = state;
844 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
845 runtime->silence_size > 0)
846 snd_pcm_playback_silence(substream, ULONG_MAX);
847 if (runtime->sleep_min)
848 snd_pcm_tick_prepare(substream);
849 if (substream->timer)
850 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, &runtime->trigger_tstamp);
851}
852
853static struct action_ops snd_pcm_action_start = {
854 .pre_action = snd_pcm_pre_start,
855 .do_action = snd_pcm_do_start,
856 .undo_action = snd_pcm_undo_start,
857 .post_action = snd_pcm_post_start
858};
859
860/**
861 * snd_pcm_start
df8db936 862 * @substream: the PCM substream instance
1da177e4
LT		 863 *
864 * Start all linked streams.
865 */
866int snd_pcm_start(snd_pcm_substream_t *substream)
867{
868 return snd_pcm_action(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
869}
870
871/*
872 * stop callbacks
873 */
874static int snd_pcm_pre_stop(snd_pcm_substream_t *substream, int state)
875{
876 snd_pcm_runtime_t *runtime = substream->runtime;
877 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
878 return -EBADFD;
879 runtime->trigger_master = substream;
880 return 0;
881}
882
883static int snd_pcm_do_stop(snd_pcm_substream_t *substream, int state)
884{
885 if (substream->runtime->trigger_master == substream &&
886 snd_pcm_running(substream))
887 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
888 return 0; /* unconditonally stop all substreams */
889}
890
891static void snd_pcm_post_stop(snd_pcm_substream_t *substream, int state)
892{
893 snd_pcm_runtime_t *runtime = substream->runtime;
894 if (runtime->status->state != state) {
895 snd_pcm_trigger_tstamp(substream);
896 if (substream->timer)
897 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, &runtime->trigger_tstamp);
898 runtime->status->state = state;
899 snd_pcm_tick_set(substream, 0);
900 }
901 wake_up(&runtime->sleep);
902}
903
904static struct action_ops snd_pcm_action_stop = {
905 .pre_action = snd_pcm_pre_stop,
906 .do_action = snd_pcm_do_stop,
907 .post_action = snd_pcm_post_stop
908};
909
910/**
911 * snd_pcm_stop
df8db936
TI		 912 * @substream: the PCM substream instance
913 * @state: PCM state after stopping the stream
1da177e4
LT		 914 *
915 * Try to stop all running streams in the substream group.
916 * The state of each stream is changed to the given value after that unconditionally.
917 */
918int snd_pcm_stop(snd_pcm_substream_t *substream, int state)
919{
920 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
921}
922
923/**
924 * snd_pcm_drain_done
df8db936 925 * @substream: the PCM substream
1da177e4
LT		 926 *
927 * Stop the DMA only when the given stream is playback.
928 * The state is changed to SETUP.
929 * Unlike snd_pcm_stop(), this affects only the given stream.
930 */
931int snd_pcm_drain_done(snd_pcm_substream_t *substream)
932{
933 return snd_pcm_action_single(&snd_pcm_action_stop, substream, SNDRV_PCM_STATE_SETUP);
934}
935
936/*
937 * pause callbacks
938 */
939static int snd_pcm_pre_pause(snd_pcm_substream_t *substream, int push)
940{
941 snd_pcm_runtime_t *runtime = substream->runtime;
942 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
943 return -ENOSYS;
944 if (push) {
945 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
946 return -EBADFD;
947 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
948 return -EBADFD;
949 runtime->trigger_master = substream;
950 return 0;
951}
952
953static int snd_pcm_do_pause(snd_pcm_substream_t *substream, int push)
954{
955 if (substream->runtime->trigger_master != substream)
956 return 0;
957 return substream->ops->trigger(substream,
958 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
959 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
960}
961
962static void snd_pcm_undo_pause(snd_pcm_substream_t *substream, int push)
963{
964 if (substream->runtime->trigger_master == substream)
965 substream->ops->trigger(substream,
966 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
967 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
968}
969
970static void snd_pcm_post_pause(snd_pcm_substream_t *substream, int push)
971{
972 snd_pcm_runtime_t *runtime = substream->runtime;
973 snd_pcm_trigger_tstamp(substream);
974 if (push) {
975 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
976 if (substream->timer)
977 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp);
978 snd_pcm_tick_set(substream, 0);
979 wake_up(&runtime->sleep);
980 } else {
981 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
982 if (runtime->sleep_min)
983 snd_pcm_tick_prepare(substream);
984 if (substream->timer)
985 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp);
986 }
987}
988
989static struct action_ops snd_pcm_action_pause = {
990 .pre_action = snd_pcm_pre_pause,
991 .do_action = snd_pcm_do_pause,
992 .undo_action = snd_pcm_undo_pause,
993 .post_action = snd_pcm_post_pause
994};
995
996/*
997 * Push/release the pause for all linked streams.
998 */
999static int snd_pcm_pause(snd_pcm_substream_t *substream, int push)
1000{
1001 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1002}
1003
1004#ifdef CONFIG_PM
1005/* suspend */
1006
1007static int snd_pcm_pre_suspend(snd_pcm_substream_t *substream, int state)
1008{
1009 snd_pcm_runtime_t *runtime = substream->runtime;
1010 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1011 return -EBUSY;
1012 runtime->trigger_master = substream;
1013 return 0;
1014}
1015
1016static int snd_pcm_do_suspend(snd_pcm_substream_t *substream, int state)
1017{
1018 snd_pcm_runtime_t *runtime = substream->runtime;
1019 if (runtime->trigger_master != substream)
1020 return 0;
1021 if (! snd_pcm_running(substream))
1022 return 0;
1023 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1024 return 0; /* suspend unconditionally */
1025}
1026
1027static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state)
1028{
1029 snd_pcm_runtime_t *runtime = substream->runtime;
1030 snd_pcm_trigger_tstamp(substream);
1031 if (substream->timer)
a501dfa3 1032 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, &runtime->trigger_tstamp);
1da177e4
LT		 1033 runtime->status->suspended_state = runtime->status->state;
1034 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1035 snd_pcm_tick_set(substream, 0);
1036 wake_up(&runtime->sleep);
1037}
1038
1039static struct action_ops snd_pcm_action_suspend = {
1040 .pre_action = snd_pcm_pre_suspend,
1041 .do_action = snd_pcm_do_suspend,
1042 .post_action = snd_pcm_post_suspend
1043};
1044
1045/**
1046 * snd_pcm_suspend
df8db936 1047 * @substream: the PCM substream
1da177e4
LT		 1048 *
1049 * Trigger SUSPEND to all linked streams.
1050 * After this call, all streams are changed to SUSPENDED state.
1051 */
1052int snd_pcm_suspend(snd_pcm_substream_t *substream)
1053{
1054 int err;
1055 unsigned long flags;
1056
1057 snd_pcm_stream_lock_irqsave(substream, flags);
1058 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1059 snd_pcm_stream_unlock_irqrestore(substream, flags);
1060 return err;
1061}
1062
1063/**
1064 * snd_pcm_suspend_all
df8db936 1065 * @pcm: the PCM instance
1da177e4
LT		 1066 *
1067 * Trigger SUSPEND to all substreams in the given pcm.
1068 * After this call, all streams are changed to SUSPENDED state.
1069 */
1070int snd_pcm_suspend_all(snd_pcm_t *pcm)
1071{
1072 snd_pcm_substream_t *substream;
1073 int stream, err = 0;
1074
1075 for (stream = 0; stream < 2; stream++) {
1076 for (substream = pcm->streams[stream].substream; substream; substream = substream->next) {
1077 /* FIXME: the open/close code should lock this as well */
1078 if (substream->runtime == NULL)
1079 continue;
1080 err = snd_pcm_suspend(substream);
1081 if (err < 0 && err != -EBUSY)
1082 return err;
1083 }
1084 }
1085 return 0;
1086}
1087
1088/* resume */
1089
1090static int snd_pcm_pre_resume(snd_pcm_substream_t *substream, int state)
1091{
1092 snd_pcm_runtime_t *runtime = substream->runtime;
1093 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1094 return -ENOSYS;
1095 runtime->trigger_master = substream;
1096 return 0;
1097}
1098
1099static int snd_pcm_do_resume(snd_pcm_substream_t *substream, int state)
1100{
1101 snd_pcm_runtime_t *runtime = substream->runtime;
1102 if (runtime->trigger_master != substream)
1103 return 0;
1104 /* DMA not running previously? */
1105 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1106 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1107 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1108 return 0;
1109 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1110}
1111
1112static void snd_pcm_undo_resume(snd_pcm_substream_t *substream, int state)
1113{
1114 if (substream->runtime->trigger_master == substream &&
1115 snd_pcm_running(substream))
1116 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1117}
1118
1119static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state)
1120{
1121 snd_pcm_runtime_t *runtime = substream->runtime;
1122 snd_pcm_trigger_tstamp(substream);
1123 if (substream->timer)
a501dfa3 1124 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, &runtime->trigger_tstamp);
1da177e4
LT		 1125 runtime->status->state = runtime->status->suspended_state;
1126 if (runtime->sleep_min)
1127 snd_pcm_tick_prepare(substream);
1128}
1129
1130static struct action_ops snd_pcm_action_resume = {
1131 .pre_action = snd_pcm_pre_resume,
1132 .do_action = snd_pcm_do_resume,
1133 .undo_action = snd_pcm_undo_resume,
1134 .post_action = snd_pcm_post_resume
1135};
1136
1137static int snd_pcm_resume(snd_pcm_substream_t *substream)
1138{
1139 snd_card_t *card = substream->pcm->card;
1140 int res;
1141
1142 snd_power_lock(card);
1143 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1144 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1145 snd_power_unlock(card);
1146 return res;
1147}
1148
1149#else
1150
1151static int snd_pcm_resume(snd_pcm_substream_t *substream)
1152{
1153 return -ENOSYS;
1154}
1155
1156#endif /* CONFIG_PM */
1157
1158/*
1159 * xrun ioctl
1160 *
1161 * Change the RUNNING stream(s) to XRUN state.
1162 */
1163static int snd_pcm_xrun(snd_pcm_substream_t *substream)
1164{
1165 snd_card_t *card = substream->pcm->card;
1166 snd_pcm_runtime_t *runtime = substream->runtime;
1167 int result;
1168
1169 snd_power_lock(card);
1170 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1171 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1172 if (result < 0)
1173 goto _unlock;
1174 }
1175
1176 snd_pcm_stream_lock_irq(substream);
1177 switch (runtime->status->state) {
1178 case SNDRV_PCM_STATE_XRUN:
1179 result = 0; /* already there */
1180 break;
1181 case SNDRV_PCM_STATE_RUNNING:
1182 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1183 break;
1184 default:
1185 result = -EBADFD;
1186 }
1187 snd_pcm_stream_unlock_irq(substream);
1188 _unlock:
1189 snd_power_unlock(card);
1190 return result;
1191}
1192
1193/*
1194 * reset ioctl
1195 */
1196static int snd_pcm_pre_reset(snd_pcm_substream_t * substream, int state)
1197{
1198 snd_pcm_runtime_t *runtime = substream->runtime;
1199 switch (runtime->status->state) {
1200 case SNDRV_PCM_STATE_RUNNING:
1201 case SNDRV_PCM_STATE_PREPARED:
1202 case SNDRV_PCM_STATE_PAUSED:
1203 case SNDRV_PCM_STATE_SUSPENDED:
1204 return 0;
1205 default:
1206 return -EBADFD;
1207 }
1208}
1209
1210static int snd_pcm_do_reset(snd_pcm_substream_t * substream, int state)
1211{
1212 snd_pcm_runtime_t *runtime = substream->runtime;
1213 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1214 if (err < 0)
1215 return err;
1216 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1217 runtime->hw_ptr_base = 0;
1218 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size;
1219 runtime->silence_start = runtime->status->hw_ptr;
1220 runtime->silence_filled = 0;
1221 return 0;
1222}
1223
1224static void snd_pcm_post_reset(snd_pcm_substream_t * substream, int state)
1225{
1226 snd_pcm_runtime_t *runtime = substream->runtime;
1227 runtime->control->appl_ptr = runtime->status->hw_ptr;
1228 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1229 runtime->silence_size > 0)
1230 snd_pcm_playback_silence(substream, ULONG_MAX);
1231}
1232
1233static struct action_ops snd_pcm_action_reset = {
1234 .pre_action = snd_pcm_pre_reset,
1235 .do_action = snd_pcm_do_reset,
1236 .post_action = snd_pcm_post_reset
1237};
1238
1239static int snd_pcm_reset(snd_pcm_substream_t *substream)
1240{
1241 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1242}
1243
1244/*
1245 * prepare ioctl
1246 */
1247static int snd_pcm_pre_prepare(snd_pcm_substream_t * substream, int state)
1248{
1249 snd_pcm_runtime_t *runtime = substream->runtime;
1250 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1251 return -EBADFD;
1252 if (snd_pcm_running(substream))
1253 return -EBUSY;
1254 return 0;
1255}
1256
1257static int snd_pcm_do_prepare(snd_pcm_substream_t * substream, int state)
1258{
1259 int err;
1260 err = substream->ops->prepare(substream);
1261 if (err < 0)
1262 return err;
1263 return snd_pcm_do_reset(substream, 0);
1264}
1265
1266static void snd_pcm_post_prepare(snd_pcm_substream_t * substream, int state)
1267{
1268 snd_pcm_runtime_t *runtime = substream->runtime;
1269 runtime->control->appl_ptr = runtime->status->hw_ptr;
1270 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1271}
1272
1273static struct action_ops snd_pcm_action_prepare = {
1274 .pre_action = snd_pcm_pre_prepare,
1275 .do_action = snd_pcm_do_prepare,
1276 .post_action = snd_pcm_post_prepare
1277};
1278
1279/**
1280 * snd_pcm_prepare
df8db936
TI		 1281 * @substream: the PCM substream instance
1282 *
1283 * Prepare the PCM substream to be triggerable.
1da177e4
LT		 1284 */
1285int snd_pcm_prepare(snd_pcm_substream_t *substream)
1286{
1287 int res;
1288 snd_card_t *card = substream->pcm->card;
1289
1290 snd_power_lock(card);
1291 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1292 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0);
1293 snd_power_unlock(card);
1294 return res;
1295}
1296
1297/*
1298 * drain ioctl
1299 */
1300
1301static int snd_pcm_pre_drain_init(snd_pcm_substream_t * substream, int state)
1302{
1303 if (substream->ffile->f_flags & O_NONBLOCK)
1304 return -EAGAIN;
1305 substream->runtime->trigger_master = substream;
1306 return 0;
1307}
1308
1309static int snd_pcm_do_drain_init(snd_pcm_substream_t * substream, int state)
1310{
1311 snd_pcm_runtime_t *runtime = substream->runtime;
1312 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1313 switch (runtime->status->state) {
1314 case SNDRV_PCM_STATE_PREPARED:
1315 /* start playback stream if possible */
1316 if (! snd_pcm_playback_empty(substream)) {
1317 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1318 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1319 }
1320 break;
1321 case SNDRV_PCM_STATE_RUNNING:
1322 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1323 break;
1324 default:
1325 break;
1326 }
1327 } else {
1328 /* stop running stream */
1329 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1330 int state = snd_pcm_capture_avail(runtime) > 0 ?
1331 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1332 snd_pcm_do_stop(substream, state);
1333 snd_pcm_post_stop(substream, state);
1334 }
1335 }
1336 return 0;
1337}
1338
1339static void snd_pcm_post_drain_init(snd_pcm_substream_t * substream, int state)
1340{
1341}
1342
1343static struct action_ops snd_pcm_action_drain_init = {
1344 .pre_action = snd_pcm_pre_drain_init,
1345 .do_action = snd_pcm_do_drain_init,
1346 .post_action = snd_pcm_post_drain_init
1347};
1348
1349struct drain_rec {
1350 snd_pcm_substream_t *substream;
1351 wait_queue_t wait;
1352 snd_pcm_uframes_t stop_threshold;
1353};
1354
1355static int snd_pcm_drop(snd_pcm_substream_t *substream);
1356
1357/*
1358 * Drain the stream(s).
1359 * When the substream is linked, sync until the draining of all playback streams
1360 * is finished.
1361 * After this call, all streams are supposed to be either SETUP or DRAINING
1362 * (capture only) state.
1363 */
1364static int snd_pcm_drain(snd_pcm_substream_t *substream)
1365{
1366 snd_card_t *card;
1367 snd_pcm_runtime_t *runtime;
1368 struct list_head *pos;
1369 int result = 0;
1370 int i, num_drecs;
1371 struct drain_rec *drec, drec_tmp, *d;
1372
1373 snd_assert(substream != NULL, return -ENXIO);
1374 card = substream->pcm->card;
1375 runtime = substream->runtime;
1376
1377 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1378 return -EBADFD;
1379
1da177e4
LT		 1380 snd_power_lock(card);
1381 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1382 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
21cb2a2e
TI		 1383 if (result < 0) {
1384 snd_power_unlock(card);
1385 return result;
1386 }
1da177e4
LT		 1387 }
1388
1389 /* allocate temporary record for drain sync */
21cb2a2e 1390 down_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1391 if (snd_pcm_stream_linked(substream)) {
1392 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1393 if (! drec) {
21cb2a2e
TI		 1394 up_read(&snd_pcm_link_rwsem);
1395 snd_power_unlock(card);
1396 return -ENOMEM;
1da177e4
LT		 1397 }
1398 } else
1399 drec = &drec_tmp;
1400
21cb2a2e 1401 /* count only playback streams */
1da177e4
LT		 1402 num_drecs = 0;
1403 snd_pcm_group_for_each(pos, substream) {
1404 snd_pcm_substream_t *s = snd_pcm_group_substream_entry(pos);
1405 runtime = s->runtime;
1da177e4
LT		 1406 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1407 d = &drec[num_drecs++];
1408 d->substream = s;
1409 init_waitqueue_entry(&d->wait, current);
1410 add_wait_queue(&runtime->sleep, &d->wait);
1411 /* stop_threshold fixup to avoid endless loop when
1412 * stop_threshold > buffer_size
1413 */
1414 d->stop_threshold = runtime->stop_threshold;
1415 if (runtime->stop_threshold > runtime->buffer_size)
1416 runtime->stop_threshold = runtime->buffer_size;
1417 }
1418 }
21cb2a2e 1419 up_read(&snd_pcm_link_rwsem);
1da177e4 1420 if (! num_drecs)
21cb2a2e
TI		 1421 goto _error;
1422
1423 snd_pcm_stream_lock_irq(substream);
1424 /* resume pause */
1425 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1426 snd_pcm_pause(substream, 0);
1427
1428 /* pre-start/stop - all running streams are changed to DRAINING state */
1429 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1430 if (result < 0) {
1431 snd_pcm_stream_unlock_irq(substream);
1432 goto _error;
1433 }
1da177e4
LT		 1434
1435 for (;;) {
1436 long tout;
1437 if (signal_pending(current)) {
1438 result = -ERESTARTSYS;
1439 break;
1440 }
21cb2a2e
TI		 1441 /* all finished? */
1442 for (i = 0; i < num_drecs; i++) {
1443 runtime = drec[i].substream->runtime;
1444 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1445 break;
1446 }
1447 if (i == num_drecs)
1448 break; /* yes, all drained */
1449
1da177e4
LT		 1450 set_current_state(TASK_INTERRUPTIBLE);
1451 snd_pcm_stream_unlock_irq(substream);
1452 snd_power_unlock(card);
1453 tout = schedule_timeout(10 * HZ);
1454 snd_power_lock(card);
1455 snd_pcm_stream_lock_irq(substream);
1456 if (tout == 0) {
1457 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1458 result = -ESTRPIPE;
1459 else {
1460 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1461 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1462 result = -EIO;
1463 }
1464 break;
1465 }
1da177e4 1466 }
21cb2a2e
TI		 1467
1468 snd_pcm_stream_unlock_irq(substream);
1469
1470 _error:
1da177e4
LT		 1471 for (i = 0; i < num_drecs; i++) {
1472 d = &drec[i];
1473 runtime = d->substream->runtime;
1474 remove_wait_queue(&runtime->sleep, &d->wait);
1475 runtime->stop_threshold = d->stop_threshold;
1476 }
1477
1da177e4
LT		 1478 if (drec != &drec_tmp)
1479 kfree(drec);
1da177e4 1480 snd_power_unlock(card);
1da177e4
LT		 1481
1482 return result;
1483}
1484
1485/*
1486 * drop ioctl
1487 *
1488 * Immediately put all linked substreams into SETUP state.
1489 */
1490static int snd_pcm_drop(snd_pcm_substream_t *substream)
1491{
1492 snd_pcm_runtime_t *runtime;
1493 snd_card_t *card;
1494 int result = 0;
1495
1496 snd_assert(substream != NULL, return -ENXIO);
1497 runtime = substream->runtime;
1498 card = substream->pcm->card;
1499
1500 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1501 return -EBADFD;
1502
1503 snd_power_lock(card);
1504 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1505 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1506 if (result < 0)
1507 goto _unlock;
1508 }
1509
1510 snd_pcm_stream_lock_irq(substream);
1511 /* resume pause */
1512 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1513 snd_pcm_pause(substream, 0);
1514
1515 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1516 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1517 snd_pcm_stream_unlock_irq(substream);
1518 _unlock:
1519 snd_power_unlock(card);
1520 return result;
1521}
1522
1523
1524/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1525static struct file *snd_pcm_file_fd(int fd)
1526{
1527 struct file *file;
1528 struct inode *inode;
1529 unsigned short minor;
1530 file = fget(fd);
1531 if (!file)
1532 return NULL;
1533 inode = file->f_dentry->d_inode;
1534 if (!S_ISCHR(inode->i_mode) ||
1535 imajor(inode) != snd_major) {
1536 fput(file);
1537 return NULL;
1538 }
1539 minor = iminor(inode);
1540 if (minor >= 256 ||
1541 minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) {
1542 fput(file);
1543 return NULL;
1544 }
1545 return file;
1546}
1547
1548/*
1549 * PCM link handling
1550 */
1551static int snd_pcm_link(snd_pcm_substream_t *substream, int fd)
1552{
1553 int res = 0;
1554 struct file *file;
1555 snd_pcm_file_t *pcm_file;
1556 snd_pcm_substream_t *substream1;
1557
1558 file = snd_pcm_file_fd(fd);
1559 if (!file)
1560 return -EBADFD;
1561 pcm_file = file->private_data;
1562 substream1 = pcm_file->substream;
1563 down_write(&snd_pcm_link_rwsem);
1564 write_lock_irq(&snd_pcm_link_rwlock);
1565 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1566 substream->runtime->status->state != substream1->runtime->status->state) {
1567 res = -EBADFD;
1568 goto _end;
1569 }
1570 if (snd_pcm_stream_linked(substream1)) {
1571 res = -EALREADY;
1572 goto _end;
1573 }
1574 if (!snd_pcm_stream_linked(substream)) {
1575 substream->group = kmalloc(sizeof(snd_pcm_group_t), GFP_ATOMIC);
1576 if (substream->group == NULL) {
1577 res = -ENOMEM;
1578 goto _end;
1579 }
1580 spin_lock_init(&substream->group->lock);
1581 INIT_LIST_HEAD(&substream->group->substreams);
1582 list_add_tail(&substream->link_list, &substream->group->substreams);
1583 substream->group->count = 1;
1584 }
1585 list_add_tail(&substream1->link_list, &substream->group->substreams);
1586 substream->group->count++;
1587 substream1->group = substream->group;
1588 _end:
1589 write_unlock_irq(&snd_pcm_link_rwlock);
1590 up_write(&snd_pcm_link_rwsem);
1591 fput(file);
1592 return res;
1593}
1594
1595static void relink_to_local(snd_pcm_substream_t *substream)
1596{
1597 substream->group = &substream->self_group;
1598 INIT_LIST_HEAD(&substream->self_group.substreams);
1599 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1600}
1601
1602static int snd_pcm_unlink(snd_pcm_substream_t *substream)
1603{
1604 struct list_head *pos;
1605 int res = 0;
1606
1607 down_write(&snd_pcm_link_rwsem);
1608 write_lock_irq(&snd_pcm_link_rwlock);
1609 if (!snd_pcm_stream_linked(substream)) {
1610 res = -EALREADY;
1611 goto _end;
1612 }
1613 list_del(&substream->link_list);
1614 substream->group->count--;
1615 if (substream->group->count == 1) { /* detach the last stream, too */
1616 snd_pcm_group_for_each(pos, substream) {
1617 relink_to_local(snd_pcm_group_substream_entry(pos));
1618 break;
1619 }
1620 kfree(substream->group);
1621 }
1622 relink_to_local(substream);
1623 _end:
1624 write_unlock_irq(&snd_pcm_link_rwlock);
1625 up_write(&snd_pcm_link_rwsem);
1626 return res;
1627}
1628
1629/*
1630 * hw configurator
1631 */
1632static int snd_pcm_hw_rule_mul(snd_pcm_hw_params_t *params,
1633 snd_pcm_hw_rule_t *rule)
1634{
1635 snd_interval_t t;
1636 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1637 hw_param_interval_c(params, rule->deps[1]), &t);
1638 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1639}
1640
1641static int snd_pcm_hw_rule_div(snd_pcm_hw_params_t *params,
1642 snd_pcm_hw_rule_t *rule)
1643{
1644 snd_interval_t t;
1645 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1646 hw_param_interval_c(params, rule->deps[1]), &t);
1647 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1648}
1649
1650static int snd_pcm_hw_rule_muldivk(snd_pcm_hw_params_t *params,
1651 snd_pcm_hw_rule_t *rule)
1652{
1653 snd_interval_t t;
1654 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1655 hw_param_interval_c(params, rule->deps[1]),
1656 (unsigned long) rule->private, &t);
1657 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1658}
1659
1660static int snd_pcm_hw_rule_mulkdiv(snd_pcm_hw_params_t *params,
1661 snd_pcm_hw_rule_t *rule)
1662{
1663 snd_interval_t t;
1664 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1665 (unsigned long) rule->private,
1666 hw_param_interval_c(params, rule->deps[1]), &t);
1667 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1668}
1669
1670static int snd_pcm_hw_rule_format(snd_pcm_hw_params_t *params,
1671 snd_pcm_hw_rule_t *rule)
1672{
1673 unsigned int k;
1674 snd_interval_t *i = hw_param_interval(params, rule->deps[0]);
1675 snd_mask_t m;
1676 snd_mask_t *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1677 snd_mask_any(&m);
1678 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1679 int bits;
1680 if (! snd_mask_test(mask, k))
1681 continue;
1682 bits = snd_pcm_format_physical_width(k);
1683 if (bits <= 0)
1684 continue; /* ignore invalid formats */
1685 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1686 snd_mask_reset(&m, k);
1687 }
1688 return snd_mask_refine(mask, &m);
1689}
1690
1691static int snd_pcm_hw_rule_sample_bits(snd_pcm_hw_params_t *params,
1692 snd_pcm_hw_rule_t *rule)
1693{
1694 snd_interval_t t;
1695 unsigned int k;
1696 t.min = UINT_MAX;
1697 t.max = 0;
1698 t.openmin = 0;
1699 t.openmax = 0;
1700 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1701 int bits;
1702 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1703 continue;
1704 bits = snd_pcm_format_physical_width(k);
1705 if (bits <= 0)
1706 continue; /* ignore invalid formats */
1707 if (t.min > (unsigned)bits)
1708 t.min = bits;
1709 if (t.max < (unsigned)bits)
1710 t.max = bits;
1711 }
1712 t.integer = 1;
1713 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1714}
1715
1716#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1717#error "Change this table"
1718#endif
1719
1720static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1721 48000, 64000, 88200, 96000, 176400, 192000 };
1722
1723static int snd_pcm_hw_rule_rate(snd_pcm_hw_params_t *params,
1724 snd_pcm_hw_rule_t *rule)
1725{
1726 snd_pcm_hardware_t *hw = rule->private;
1727 return snd_interval_list(hw_param_interval(params, rule->var),
1728 ARRAY_SIZE(rates), rates, hw->rates);
1729}
1730
1731static int snd_pcm_hw_rule_buffer_bytes_max(snd_pcm_hw_params_t *params,
1732 snd_pcm_hw_rule_t *rule)
1733{
1734 snd_interval_t t;
1735 snd_pcm_substream_t *substream = rule->private;
1736 t.min = 0;
1737 t.max = substream->buffer_bytes_max;
1738 t.openmin = 0;
1739 t.openmax = 0;
1740 t.integer = 1;
1741 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1742}
1743
1744int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream)
1745{
1746 snd_pcm_runtime_t *runtime = substream->runtime;
1747 snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
1748 int k, err;
1749
1750 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1751 snd_mask_any(constrs_mask(constrs, k));
1752 }
1753
1754 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1755 snd_interval_any(constrs_interval(constrs, k));
1756 }
1757
1758 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1759 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1760 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1761 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1762 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1763
1764 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1765 snd_pcm_hw_rule_format, NULL,
1766 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1767 if (err < 0)
1768 return err;
1769 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1770 snd_pcm_hw_rule_sample_bits, NULL,
1771 SNDRV_PCM_HW_PARAM_FORMAT,
1772 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1773 if (err < 0)
1774 return err;
1775 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1776 snd_pcm_hw_rule_div, NULL,
1777 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1778 if (err < 0)
1779 return err;
1780 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1781 snd_pcm_hw_rule_mul, NULL,
1782 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1783 if (err < 0)
1784 return err;
1785 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1786 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1787 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1788 if (err < 0)
1789 return err;
1790 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1791 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1792 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1793 if (err < 0)
1794 return err;
1795 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1796 snd_pcm_hw_rule_div, NULL,
1797 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1798 if (err < 0)
1799 return err;
1800 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1801 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1802 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1803 if (err < 0)
1804 return err;
1805 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1806 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1807 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1808 if (err < 0)
1809 return err;
1810 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1811 snd_pcm_hw_rule_div, NULL,
1812 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1813 if (err < 0)
1814 return err;
1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1816 snd_pcm_hw_rule_div, NULL,
1817 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1818 if (err < 0)
1819 return err;
1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1821 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1822 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1823 if (err < 0)
1824 return err;
1825 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1826 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1827 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1828 if (err < 0)
1829 return err;
1830 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1831 snd_pcm_hw_rule_mul, NULL,
1832 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1833 if (err < 0)
1834 return err;
1835 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1836 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1837 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1838 if (err < 0)
1839 return err;
1840 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1841 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1842 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1843 if (err < 0)
1844 return err;
1845 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1846 snd_pcm_hw_rule_muldivk, (void*) 8,
1847 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1848 if (err < 0)
1849 return err;
1850 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1851 snd_pcm_hw_rule_muldivk, (void*) 8,
1852 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1853 if (err < 0)
1854 return err;
1855 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1856 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1857 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1858 if (err < 0)
1859 return err;
1860 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1861 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1862 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1863 if (err < 0)
1864 return err;
1865 return 0;
1866}
1867
1868int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream)
1869{
1870 snd_pcm_runtime_t *runtime = substream->runtime;
1871 snd_pcm_hardware_t *hw = &runtime->hw;
1872 int err;
1873 unsigned int mask = 0;
1874
1875 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1876 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1877 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1878 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1879 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1880 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1881 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1882 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1883 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1884 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1885 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1886 }
1887 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1888 snd_assert(err >= 0, return -EINVAL);
1889
1890 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1891 snd_assert(err >= 0, return -EINVAL);
1892
1893 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1894 snd_assert(err >= 0, return -EINVAL);
1895
1896 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1897 hw->channels_min, hw->channels_max);
1898 snd_assert(err >= 0, return -EINVAL);
1899
1900 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1901 hw->rate_min, hw->rate_max);
1902 snd_assert(err >= 0, return -EINVAL);
1903
1904 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1905 hw->period_bytes_min, hw->period_bytes_max);
1906 snd_assert(err >= 0, return -EINVAL);
1907
1908 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1909 hw->periods_min, hw->periods_max);
1910 snd_assert(err >= 0, return -EINVAL);
1911
1912 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1913 hw->period_bytes_min, hw->buffer_bytes_max);
1914 snd_assert(err >= 0, return -EINVAL);
1915
1916 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1917 snd_pcm_hw_rule_buffer_bytes_max, substream,
1918 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1919 if (err < 0)
1920 return err;
1921
1922 /* FIXME: remove */
1923 if (runtime->dma_bytes) {
1924 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1925 snd_assert(err >= 0, return -EINVAL);
1926 }
1927
1928 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1929 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1930 snd_pcm_hw_rule_rate, hw,
1931 SNDRV_PCM_HW_PARAM_RATE, -1);
1932 if (err < 0)
1933 return err;
1934 }
1935
1936 /* FIXME: this belong to lowlevel */
1937 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1938 1000000 / HZ, 1000000 / HZ);
1939 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1940
1941 return 0;
1942}
1943
1944static void snd_pcm_add_file(snd_pcm_str_t *str,
1945 snd_pcm_file_t *pcm_file)
1946{
1947 pcm_file->next = str->files;
1948 str->files = pcm_file;
1949}
1950
1951static void snd_pcm_remove_file(snd_pcm_str_t *str,
1952 snd_pcm_file_t *pcm_file)
1953{
1954 snd_pcm_file_t * pcm_file1;
1955 if (str->files == pcm_file) {
1956 str->files = pcm_file->next;
1957 } else {
1958 pcm_file1 = str->files;
1959 while (pcm_file1 && pcm_file1->next != pcm_file)
1960 pcm_file1 = pcm_file1->next;
1961 if (pcm_file1 != NULL)
1962 pcm_file1->next = pcm_file->next;
1963 }
1964}
1965
1966static int snd_pcm_release_file(snd_pcm_file_t * pcm_file)
1967{
1968 snd_pcm_substream_t *substream;
1969 snd_pcm_runtime_t *runtime;
1970 snd_pcm_str_t * str;
1971
1972 snd_assert(pcm_file != NULL, return -ENXIO);
1973 substream = pcm_file->substream;
1974 snd_assert(substream != NULL, return -ENXIO);
1975 runtime = substream->runtime;
1976 str = substream->pstr;
1977 snd_pcm_unlink(substream);
443feb88 1978 if (substream->ffile != NULL) {
1da177e4
LT		 1979 if (substream->ops->hw_free != NULL)
1980 substream->ops->hw_free(substream);
1981 substream->ops->close(substream);
443feb88 1982 substream->ffile = NULL;
1da177e4 1983 }
1da177e4
LT		 1984 snd_pcm_remove_file(str, pcm_file);
1985 snd_pcm_release_substream(substream);
1986 kfree(pcm_file);
1987 return 0;
1988}
1989
1990static int snd_pcm_open_file(struct file *file,
1991 snd_pcm_t *pcm,
1992 int stream,
1993 snd_pcm_file_t **rpcm_file)
1994{
1995 int err = 0;
1996 snd_pcm_file_t *pcm_file;
1997 snd_pcm_substream_t *substream;
1998 snd_pcm_str_t *str;
1999
2000 snd_assert(rpcm_file != NULL, return -EINVAL);
2001 *rpcm_file = NULL;
2002
ca2c0966 2003 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
1da177e4
LT		 2004 if (pcm_file == NULL) {
2005 return -ENOMEM;
2006 }
2007
2008 if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) {
2009 kfree(pcm_file);
2010 return err;
2011 }
2012
2013 str = substream->pstr;
2014 substream->file = pcm_file;
2015 substream->no_mmap_ctrl = 0;
2016
2017 pcm_file->substream = substream;
2018
2019 snd_pcm_add_file(str, pcm_file);
2020
2021 err = snd_pcm_hw_constraints_init(substream);
2022 if (err < 0) {
2023 snd_printd("snd_pcm_hw_constraints_init failed\n");
2024 snd_pcm_release_file(pcm_file);
2025 return err;
2026 }
2027
2028 if ((err = substream->ops->open(substream)) < 0) {
2029 snd_pcm_release_file(pcm_file);
2030 return err;
2031 }
443feb88 2032 substream->ffile = file;
1da177e4
LT		 2033
2034 err = snd_pcm_hw_constraints_complete(substream);
2035 if (err < 0) {
2036 snd_printd("snd_pcm_hw_constraints_complete failed\n");
1da177e4
LT		 2037 snd_pcm_release_file(pcm_file);
2038 return err;
2039 }
2040
1da177e4
LT		 2041 file->private_data = pcm_file;
2042 *rpcm_file = pcm_file;
2043 return 0;
2044}
2045
2046static int snd_pcm_open(struct inode *inode, struct file *file)
2047{
2048 int cardnum = SNDRV_MINOR_CARD(iminor(inode));
2049 int device = SNDRV_MINOR_DEVICE(iminor(inode));
2050 int err;
2051 snd_pcm_t *pcm;
2052 snd_pcm_file_t *pcm_file;
2053 wait_queue_t wait;
2054
7c22f1aa
TI		 2055 if (device < SNDRV_MINOR_PCM_PLAYBACK || device >= SNDRV_MINOR_DEVICES)
2056 return -ENXIO;
1da177e4
LT		 2057 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)];
2058 if (pcm == NULL) {
2059 err = -ENODEV;
2060 goto __error1;
2061 }
2062 err = snd_card_file_add(pcm->card, file);
2063 if (err < 0)
2064 goto __error1;
2065 if (!try_module_get(pcm->card->module)) {
2066 err = -EFAULT;
2067 goto __error2;
2068 }
2069 init_waitqueue_entry(&wait, current);
2070 add_wait_queue(&pcm->open_wait, &wait);
2071 down(&pcm->open_mutex);
2072 while (1) {
2073 err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file);
2074 if (err >= 0)
2075 break;
2076 if (err == -EAGAIN) {
2077 if (file->f_flags & O_NONBLOCK) {
2078 err = -EBUSY;
2079 break;
2080 }
2081 } else
2082 break;
2083 set_current_state(TASK_INTERRUPTIBLE);
2084 up(&pcm->open_mutex);
2085 schedule();
2086 down(&pcm->open_mutex);
2087 if (signal_pending(current)) {
2088 err = -ERESTARTSYS;
2089 break;
2090 }
2091 }
2092 remove_wait_queue(&pcm->open_wait, &wait);
2093 up(&pcm->open_mutex);
2094 if (err < 0)
2095 goto __error;
2096 return err;
2097
2098 __error:
2099 module_put(pcm->card->module);
2100 __error2:
2101 snd_card_file_remove(pcm->card, file);
2102 __error1:
2103 return err;
2104}
2105
2106static int snd_pcm_release(struct inode *inode, struct file *file)
2107{
2108 snd_pcm_t *pcm;
2109 snd_pcm_substream_t *substream;
2110 snd_pcm_file_t *pcm_file;
2111
2112 pcm_file = file->private_data;
2113 substream = pcm_file->substream;
2114 snd_assert(substream != NULL, return -ENXIO);
2115 snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2116 pcm = substream->pcm;
2117 snd_pcm_drop(substream);
2118 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2119 down(&pcm->open_mutex);
2120 snd_pcm_release_file(pcm_file);
2121 up(&pcm->open_mutex);
2122 wake_up(&pcm->open_wait);
2123 module_put(pcm->card->module);
2124 snd_card_file_remove(pcm->card, file);
2125 return 0;
2126}
2127
2128static snd_pcm_sframes_t snd_pcm_playback_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2129{
2130 snd_pcm_runtime_t *runtime = substream->runtime;
2131 snd_pcm_sframes_t appl_ptr;
2132 snd_pcm_sframes_t ret;
2133 snd_pcm_sframes_t hw_avail;
2134
2135 if (frames == 0)
2136 return 0;
2137
2138 snd_pcm_stream_lock_irq(substream);
2139 switch (runtime->status->state) {
2140 case SNDRV_PCM_STATE_PREPARED:
2141 break;
2142 case SNDRV_PCM_STATE_DRAINING:
2143 case SNDRV_PCM_STATE_RUNNING:
2144 if (snd_pcm_update_hw_ptr(substream) >= 0)
2145 break;
2146 /* Fall through */
2147 case SNDRV_PCM_STATE_XRUN:
2148 ret = -EPIPE;
2149 goto __end;
2150 default:
2151 ret = -EBADFD;
2152 goto __end;
2153 }
2154
2155 hw_avail = snd_pcm_playback_hw_avail(runtime);
2156 if (hw_avail <= 0) {
2157 ret = 0;
2158 goto __end;
2159 }
2160 if (frames > (snd_pcm_uframes_t)hw_avail)
2161 frames = hw_avail;
2162 else
2163 frames -= frames % runtime->xfer_align;
2164 appl_ptr = runtime->control->appl_ptr - frames;
2165 if (appl_ptr < 0)
2166 appl_ptr += runtime->boundary;
2167 runtime->control->appl_ptr = appl_ptr;
2168 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2169 runtime->sleep_min)
2170 snd_pcm_tick_prepare(substream);
2171 ret = frames;
2172 __end:
2173 snd_pcm_stream_unlock_irq(substream);
2174 return ret;
2175}
2176
2177static snd_pcm_sframes_t snd_pcm_capture_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2178{
2179 snd_pcm_runtime_t *runtime = substream->runtime;
2180 snd_pcm_sframes_t appl_ptr;
2181 snd_pcm_sframes_t ret;
2182 snd_pcm_sframes_t hw_avail;
2183
2184 if (frames == 0)
2185 return 0;
2186
2187 snd_pcm_stream_lock_irq(substream);
2188 switch (runtime->status->state) {
2189 case SNDRV_PCM_STATE_PREPARED:
2190 case SNDRV_PCM_STATE_DRAINING:
2191 break;
2192 case SNDRV_PCM_STATE_RUNNING:
2193 if (snd_pcm_update_hw_ptr(substream) >= 0)
2194 break;
2195 /* Fall through */
2196 case SNDRV_PCM_STATE_XRUN:
2197 ret = -EPIPE;
2198 goto __end;
2199 default:
2200 ret = -EBADFD;
2201 goto __end;
2202 }
2203
2204 hw_avail = snd_pcm_capture_hw_avail(runtime);
2205 if (hw_avail <= 0) {
2206 ret = 0;
2207 goto __end;
2208 }
2209 if (frames > (snd_pcm_uframes_t)hw_avail)
2210 frames = hw_avail;
2211 else
2212 frames -= frames % runtime->xfer_align;
2213 appl_ptr = runtime->control->appl_ptr - frames;
2214 if (appl_ptr < 0)
2215 appl_ptr += runtime->boundary;
2216 runtime->control->appl_ptr = appl_ptr;
2217 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2218 runtime->sleep_min)
2219 snd_pcm_tick_prepare(substream);
2220 ret = frames;
2221 __end:
2222 snd_pcm_stream_unlock_irq(substream);
2223 return ret;
2224}
2225
2226static snd_pcm_sframes_t snd_pcm_playback_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2227{
2228 snd_pcm_runtime_t *runtime = substream->runtime;
2229 snd_pcm_sframes_t appl_ptr;
2230 snd_pcm_sframes_t ret;
2231 snd_pcm_sframes_t avail;
2232
2233 if (frames == 0)
2234 return 0;
2235
2236 snd_pcm_stream_lock_irq(substream);
2237 switch (runtime->status->state) {
2238 case SNDRV_PCM_STATE_PREPARED:
2239 case SNDRV_PCM_STATE_PAUSED:
2240 break;
2241 case SNDRV_PCM_STATE_DRAINING:
2242 case SNDRV_PCM_STATE_RUNNING:
2243 if (snd_pcm_update_hw_ptr(substream) >= 0)
2244 break;
2245 /* Fall through */
2246 case SNDRV_PCM_STATE_XRUN:
2247 ret = -EPIPE;
2248 goto __end;
2249 default:
2250 ret = -EBADFD;
2251 goto __end;
2252 }
2253
2254 avail = snd_pcm_playback_avail(runtime);
2255 if (avail <= 0) {
2256 ret = 0;
2257 goto __end;
2258 }
2259 if (frames > (snd_pcm_uframes_t)avail)
2260 frames = avail;
2261 else
2262 frames -= frames % runtime->xfer_align;
2263 appl_ptr = runtime->control->appl_ptr + frames;
2264 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2265 appl_ptr -= runtime->boundary;
2266 runtime->control->appl_ptr = appl_ptr;
2267 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2268 runtime->sleep_min)
2269 snd_pcm_tick_prepare(substream);
2270 ret = frames;
2271 __end:
2272 snd_pcm_stream_unlock_irq(substream);
2273 return ret;
2274}
2275
2276static snd_pcm_sframes_t snd_pcm_capture_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2277{
2278 snd_pcm_runtime_t *runtime = substream->runtime;
2279 snd_pcm_sframes_t appl_ptr;
2280 snd_pcm_sframes_t ret;
2281 snd_pcm_sframes_t avail;
2282
2283 if (frames == 0)
2284 return 0;
2285
2286 snd_pcm_stream_lock_irq(substream);
2287 switch (runtime->status->state) {
2288 case SNDRV_PCM_STATE_PREPARED:
2289 case SNDRV_PCM_STATE_DRAINING:
2290 case SNDRV_PCM_STATE_PAUSED:
2291 break;
2292 case SNDRV_PCM_STATE_RUNNING:
2293 if (snd_pcm_update_hw_ptr(substream) >= 0)
2294 break;
2295 /* Fall through */
2296 case SNDRV_PCM_STATE_XRUN:
2297 ret = -EPIPE;
2298 goto __end;
2299 default:
2300 ret = -EBADFD;
2301 goto __end;
2302 }
2303
2304 avail = snd_pcm_capture_avail(runtime);
2305 if (avail <= 0) {
2306 ret = 0;
2307 goto __end;
2308 }
2309 if (frames > (snd_pcm_uframes_t)avail)
2310 frames = avail;
2311 else
2312 frames -= frames % runtime->xfer_align;
2313 appl_ptr = runtime->control->appl_ptr + frames;
2314 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2315 appl_ptr -= runtime->boundary;
2316 runtime->control->appl_ptr = appl_ptr;
2317 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2318 runtime->sleep_min)
2319 snd_pcm_tick_prepare(substream);
2320 ret = frames;
2321 __end:
2322 snd_pcm_stream_unlock_irq(substream);
2323 return ret;
2324}
2325
2326static int snd_pcm_hwsync(snd_pcm_substream_t *substream)
2327{
2328 snd_pcm_runtime_t *runtime = substream->runtime;
2329 int err;
2330
2331 snd_pcm_stream_lock_irq(substream);
2332 switch (runtime->status->state) {
2333 case SNDRV_PCM_STATE_DRAINING:
2334 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2335 goto __badfd;
2336 case SNDRV_PCM_STATE_RUNNING:
2337 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2338 break;
2339 /* Fall through */
2340 case SNDRV_PCM_STATE_PREPARED:
2341 case SNDRV_PCM_STATE_SUSPENDED:
2342 err = 0;
2343 break;
2344 case SNDRV_PCM_STATE_XRUN:
2345 err = -EPIPE;
2346 break;
2347 default:
2348 __badfd:
2349 err = -EBADFD;
2350 break;
2351 }
2352 snd_pcm_stream_unlock_irq(substream);
2353 return err;
2354}
2355
2356static int snd_pcm_delay(snd_pcm_substream_t *substream, snd_pcm_sframes_t __user *res)
2357{
2358 snd_pcm_runtime_t *runtime = substream->runtime;
2359 int err;
2360 snd_pcm_sframes_t n = 0;
2361
2362 snd_pcm_stream_lock_irq(substream);
2363 switch (runtime->status->state) {
2364 case SNDRV_PCM_STATE_DRAINING:
2365 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2366 goto __badfd;
2367 case SNDRV_PCM_STATE_RUNNING:
2368 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2369 break;
2370 /* Fall through */
2371 case SNDRV_PCM_STATE_PREPARED:
2372 case SNDRV_PCM_STATE_SUSPENDED:
2373 err = 0;
2374 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2375 n = snd_pcm_playback_hw_avail(runtime);
2376 else
2377 n = snd_pcm_capture_avail(runtime);
2378 break;
2379 case SNDRV_PCM_STATE_XRUN:
2380 err = -EPIPE;
2381 break;
2382 default:
2383 __badfd:
2384 err = -EBADFD;
2385 break;
2386 }
2387 snd_pcm_stream_unlock_irq(substream);
2388 if (!err)
2389 if (put_user(n, res))
2390 err = -EFAULT;
2391 return err;
2392}
2393
2394static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr __user *_sync_ptr)
2395{
2396 snd_pcm_runtime_t *runtime = substream->runtime;
2397 struct sndrv_pcm_sync_ptr sync_ptr;
2398 volatile struct sndrv_pcm_mmap_status *status;
2399 volatile struct sndrv_pcm_mmap_control *control;
2400 int err;
2401
2402 memset(&sync_ptr, 0, sizeof(sync_ptr));
2403 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2404 return -EFAULT;
2405 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct sndrv_pcm_mmap_control)))
2406 return -EFAULT;
2407 status = runtime->status;
2408 control = runtime->control;
2409 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2410 err = snd_pcm_hwsync(substream);
2411 if (err < 0)
2412 return err;
2413 }
2414 snd_pcm_stream_lock_irq(substream);
2415 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2416 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2417 else
2418 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2419 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2420 control->avail_min = sync_ptr.c.control.avail_min;
2421 else
2422 sync_ptr.c.control.avail_min = control->avail_min;
2423 sync_ptr.s.status.state = status->state;
2424 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2425 sync_ptr.s.status.tstamp = status->tstamp;
2426 sync_ptr.s.status.suspended_state = status->suspended_state;
2427 snd_pcm_stream_unlock_irq(substream);
2428 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2429 return -EFAULT;
2430 return 0;
2431}
2432
2433static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2434 unsigned int cmd, void __user *arg);
2435static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2436 unsigned int cmd, void __user *arg);
2437
2438static int snd_pcm_common_ioctl1(snd_pcm_substream_t *substream,
2439 unsigned int cmd, void __user *arg)
2440{
2441 snd_assert(substream != NULL, return -ENXIO);
2442
2443 switch (cmd) {
2444 case SNDRV_PCM_IOCTL_PVERSION:
2445 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2446 case SNDRV_PCM_IOCTL_INFO:
2447 return snd_pcm_info_user(substream, arg);
07799e75 2448 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
1da177e4 2449 return 0;
1da177e4
LT		 2450 case SNDRV_PCM_IOCTL_HW_REFINE:
2451 return snd_pcm_hw_refine_user(substream, arg);
2452 case SNDRV_PCM_IOCTL_HW_PARAMS:
2453 return snd_pcm_hw_params_user(substream, arg);
2454 case SNDRV_PCM_IOCTL_HW_FREE:
2455 return snd_pcm_hw_free(substream);
2456 case SNDRV_PCM_IOCTL_SW_PARAMS:
2457 return snd_pcm_sw_params_user(substream, arg);
2458 case SNDRV_PCM_IOCTL_STATUS:
2459 return snd_pcm_status_user(substream, arg);
2460 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2461 return snd_pcm_channel_info_user(substream, arg);
2462 case SNDRV_PCM_IOCTL_PREPARE:
2463 return snd_pcm_prepare(substream);
2464 case SNDRV_PCM_IOCTL_RESET:
2465 return snd_pcm_reset(substream);
2466 case SNDRV_PCM_IOCTL_START:
2467 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2468 case SNDRV_PCM_IOCTL_LINK:
2469 return snd_pcm_link(substream, (int)(unsigned long) arg);
2470 case SNDRV_PCM_IOCTL_UNLINK:
2471 return snd_pcm_unlink(substream);
2472 case SNDRV_PCM_IOCTL_RESUME:
2473 return snd_pcm_resume(substream);
2474 case SNDRV_PCM_IOCTL_XRUN:
2475 return snd_pcm_xrun(substream);
2476 case SNDRV_PCM_IOCTL_HWSYNC:
2477 return snd_pcm_hwsync(substream);
2478 case SNDRV_PCM_IOCTL_DELAY:
2479 return snd_pcm_delay(substream, arg);
2480 case SNDRV_PCM_IOCTL_SYNC_PTR:
2481 return snd_pcm_sync_ptr(substream, arg);
2482 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2483 return snd_pcm_hw_refine_old_user(substream, arg);
2484 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2485 return snd_pcm_hw_params_old_user(substream, arg);
2486 case SNDRV_PCM_IOCTL_DRAIN:
2487 return snd_pcm_drain(substream);
2488 case SNDRV_PCM_IOCTL_DROP:
2489 return snd_pcm_drop(substream);
2490 }
2491 snd_printd("unknown ioctl = 0x%x\n", cmd);
2492 return -ENOTTY;
2493}
2494
2495static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2496 unsigned int cmd, void __user *arg)
2497{
2498 snd_assert(substream != NULL, return -ENXIO);
2499 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2500 switch (cmd) {
2501 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2502 {
2503 snd_xferi_t xferi;
2504 snd_xferi_t __user *_xferi = arg;
2505 snd_pcm_runtime_t *runtime = substream->runtime;
2506 snd_pcm_sframes_t result;
2507 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2508 return -EBADFD;
2509 if (put_user(0, &_xferi->result))
2510 return -EFAULT;
2511 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2512 return -EFAULT;
2513 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2514 __put_user(result, &_xferi->result);
2515 return result < 0 ? result : 0;
2516 }
2517 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2518 {
2519 snd_xfern_t xfern;
2520 snd_xfern_t __user *_xfern = arg;
2521 snd_pcm_runtime_t *runtime = substream->runtime;
2522 void __user **bufs;
2523 snd_pcm_sframes_t result;
2524 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2525 return -EBADFD;
2526 if (runtime->channels > 128)
2527 return -EINVAL;
2528 if (put_user(0, &_xfern->result))
2529 return -EFAULT;
2530 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2531 return -EFAULT;
2532 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2533 if (bufs == NULL)
2534 return -ENOMEM;
2535 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2536 kfree(bufs);
2537 return -EFAULT;
2538 }
2539 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2540 kfree(bufs);
2541 __put_user(result, &_xfern->result);
2542 return result < 0 ? result : 0;
2543 }
2544 case SNDRV_PCM_IOCTL_REWIND:
2545 {
2546 snd_pcm_uframes_t frames;
2547 snd_pcm_uframes_t __user *_frames = arg;
2548 snd_pcm_sframes_t result;
2549 if (get_user(frames, _frames))
2550 return -EFAULT;
2551 if (put_user(0, _frames))
2552 return -EFAULT;
2553 result = snd_pcm_playback_rewind(substream, frames);
2554 __put_user(result, _frames);
2555 return result < 0 ? result : 0;
2556 }
2557 case SNDRV_PCM_IOCTL_FORWARD:
2558 {
2559 snd_pcm_uframes_t frames;
2560 snd_pcm_uframes_t __user *_frames = arg;
2561 snd_pcm_sframes_t result;
2562 if (get_user(frames, _frames))
2563 return -EFAULT;
2564 if (put_user(0, _frames))
2565 return -EFAULT;
2566 result = snd_pcm_playback_forward(substream, frames);
2567 __put_user(result, _frames);
2568 return result < 0 ? result : 0;
2569 }
2570 case SNDRV_PCM_IOCTL_PAUSE:
2571 {
2572 int res;
2573 snd_pcm_stream_lock_irq(substream);
2574 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2575 snd_pcm_stream_unlock_irq(substream);
2576 return res;
2577 }
2578 }
2579 return snd_pcm_common_ioctl1(substream, cmd, arg);
2580}
2581
2582static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2583 unsigned int cmd, void __user *arg)
2584{
2585 snd_assert(substream != NULL, return -ENXIO);
2586 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2587 switch (cmd) {
2588 case SNDRV_PCM_IOCTL_READI_FRAMES:
2589 {
2590 snd_xferi_t xferi;
2591 snd_xferi_t __user *_xferi = arg;
2592 snd_pcm_runtime_t *runtime = substream->runtime;
2593 snd_pcm_sframes_t result;
2594 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2595 return -EBADFD;
2596 if (put_user(0, &_xferi->result))
2597 return -EFAULT;
2598 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2599 return -EFAULT;
2600 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2601 __put_user(result, &_xferi->result);
2602 return result < 0 ? result : 0;
2603 }
2604 case SNDRV_PCM_IOCTL_READN_FRAMES:
2605 {
2606 snd_xfern_t xfern;
2607 snd_xfern_t __user *_xfern = arg;
2608 snd_pcm_runtime_t *runtime = substream->runtime;
2609 void *bufs;
2610 snd_pcm_sframes_t result;
2611 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2612 return -EBADFD;
2613 if (runtime->channels > 128)
2614 return -EINVAL;
2615 if (put_user(0, &_xfern->result))
2616 return -EFAULT;
2617 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2618 return -EFAULT;
2619 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2620 if (bufs == NULL)
2621 return -ENOMEM;
2622 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2623 kfree(bufs);
2624 return -EFAULT;
2625 }
2626 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2627 kfree(bufs);
2628 __put_user(result, &_xfern->result);
2629 return result < 0 ? result : 0;
2630 }
2631 case SNDRV_PCM_IOCTL_REWIND:
2632 {
2633 snd_pcm_uframes_t frames;
2634 snd_pcm_uframes_t __user *_frames = arg;
2635 snd_pcm_sframes_t result;
2636 if (get_user(frames, _frames))
2637 return -EFAULT;
2638 if (put_user(0, _frames))
2639 return -EFAULT;
2640 result = snd_pcm_capture_rewind(substream, frames);
2641 __put_user(result, _frames);
2642 return result < 0 ? result : 0;
2643 }
2644 case SNDRV_PCM_IOCTL_FORWARD:
2645 {
2646 snd_pcm_uframes_t frames;
2647 snd_pcm_uframes_t __user *_frames = arg;
2648 snd_pcm_sframes_t result;
2649 if (get_user(frames, _frames))
2650 return -EFAULT;
2651 if (put_user(0, _frames))
2652 return -EFAULT;
2653 result = snd_pcm_capture_forward(substream, frames);
2654 __put_user(result, _frames);
2655 return result < 0 ? result : 0;
2656 }
2657 }
2658 return snd_pcm_common_ioctl1(substream, cmd, arg);
2659}
2660
2661static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2662{
2663 snd_pcm_file_t *pcm_file;
2664
2665 pcm_file = file->private_data;
2666
2667 if (((cmd >> 8) & 0xff) != 'A')
2668 return -ENOTTY;
2669
2670 return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2671}
2672
2673static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2674{
2675 snd_pcm_file_t *pcm_file;
2676
2677 pcm_file = file->private_data;
2678
2679 if (((cmd >> 8) & 0xff) != 'A')
2680 return -ENOTTY;
2681
2682 return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2683}
2684
2685int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream,
2686 unsigned int cmd, void *arg)
2687{
2688 mm_segment_t fs;
2689 int result;
2690
2691 fs = snd_enter_user();
2692 result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg);
2693 snd_leave_user(fs);
2694 return result;
2695}
2696
2697int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream,
2698 unsigned int cmd, void *arg)
2699{
2700 mm_segment_t fs;
2701 int result;
2702
2703 fs = snd_enter_user();
2704 result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg);
2705 snd_leave_user(fs);
2706 return result;
2707}
2708
2709int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream,
2710 unsigned int cmd, void *arg)
2711{
2712 switch (substream->stream) {
2713 case SNDRV_PCM_STREAM_PLAYBACK:
2714 return snd_pcm_kernel_playback_ioctl(substream, cmd, arg);
2715 case SNDRV_PCM_STREAM_CAPTURE:
2716 return snd_pcm_kernel_capture_ioctl(substream, cmd, arg);
2717 default:
2718 return -EINVAL;
2719 }
2720}
2721
2722static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, loff_t * offset)
2723{
2724 snd_pcm_file_t *pcm_file;
2725 snd_pcm_substream_t *substream;
2726 snd_pcm_runtime_t *runtime;
2727 snd_pcm_sframes_t result;
2728
2729 pcm_file = file->private_data;
2730 substream = pcm_file->substream;
2731 snd_assert(substream != NULL, return -ENXIO);
2732 runtime = substream->runtime;
2733 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2734 return -EBADFD;
2735 if (!frame_aligned(runtime, count))
2736 return -EINVAL;
2737 count = bytes_to_frames(runtime, count);
2738 result = snd_pcm_lib_read(substream, buf, count);
2739 if (result > 0)
2740 result = frames_to_bytes(runtime, result);
2741 return result;
2742}
2743
2744static ssize_t snd_pcm_write(struct file *file, const char __user *buf, size_t count, loff_t * offset)
2745{
2746 snd_pcm_file_t *pcm_file;
2747 snd_pcm_substream_t *substream;
2748 snd_pcm_runtime_t *runtime;
2749 snd_pcm_sframes_t result;
2750
2751 pcm_file = file->private_data;
2752 substream = pcm_file->substream;
2753 snd_assert(substream != NULL, result = -ENXIO; goto end);
2754 runtime = substream->runtime;
2755 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2756 result = -EBADFD;
2757 goto end;
2758 }
2759 if (!frame_aligned(runtime, count)) {
2760 result = -EINVAL;
2761 goto end;
2762 }
2763 count = bytes_to_frames(runtime, count);
2764 result = snd_pcm_lib_write(substream, buf, count);
2765 if (result > 0)
2766 result = frames_to_bytes(runtime, result);
2767 end:
2768 return result;
2769}
2770
2771static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2772 unsigned long count, loff_t * offset)
2773
2774{
2775 snd_pcm_file_t *pcm_file;
2776 snd_pcm_substream_t *substream;
2777 snd_pcm_runtime_t *runtime;
2778 snd_pcm_sframes_t result;
2779 unsigned long i;
2780 void __user **bufs;
2781 snd_pcm_uframes_t frames;
2782
2783 pcm_file = file->private_data;
2784 substream = pcm_file->substream;
2785 snd_assert(substream != NULL, return -ENXIO);
2786 runtime = substream->runtime;
2787 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2788 return -EBADFD;
2789 if (count > 1024 || count != runtime->channels)
2790 return -EINVAL;
2791 if (!frame_aligned(runtime, _vector->iov_len))
2792 return -EINVAL;
2793 frames = bytes_to_samples(runtime, _vector->iov_len);
2794 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2795 if (bufs == NULL)
2796 return -ENOMEM;
2797 for (i = 0; i < count; ++i)
2798 bufs[i] = _vector[i].iov_base;
2799 result = snd_pcm_lib_readv(substream, bufs, frames);
2800 if (result > 0)
2801 result = frames_to_bytes(runtime, result);
2802 kfree(bufs);
2803 return result;
2804}
2805
2806static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2807 unsigned long count, loff_t * offset)
2808{
2809 snd_pcm_file_t *pcm_file;
2810 snd_pcm_substream_t *substream;
2811 snd_pcm_runtime_t *runtime;
2812 snd_pcm_sframes_t result;
2813 unsigned long i;
2814 void __user **bufs;
2815 snd_pcm_uframes_t frames;
2816
2817 pcm_file = file->private_data;
2818 substream = pcm_file->substream;
2819 snd_assert(substream != NULL, result = -ENXIO; goto end);
2820 runtime = substream->runtime;
2821 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2822 result = -EBADFD;
2823 goto end;
2824 }
2825 if (count > 128 || count != runtime->channels ||
2826 !frame_aligned(runtime, _vector->iov_len)) {
2827 result = -EINVAL;
2828 goto end;
2829 }
2830 frames = bytes_to_samples(runtime, _vector->iov_len);
2831 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2832 if (bufs == NULL)
2833 return -ENOMEM;
2834 for (i = 0; i < count; ++i)
2835 bufs[i] = _vector[i].iov_base;
2836 result = snd_pcm_lib_writev(substream, bufs, frames);
2837 if (result > 0)
2838 result = frames_to_bytes(runtime, result);
2839 kfree(bufs);
2840 end:
2841 return result;
2842}
2843
2844static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2845{
2846 snd_pcm_file_t *pcm_file;
2847 snd_pcm_substream_t *substream;
2848 snd_pcm_runtime_t *runtime;
2849 unsigned int mask;
2850 snd_pcm_uframes_t avail;
2851
2852 pcm_file = file->private_data;
2853
2854 substream = pcm_file->substream;
2855 snd_assert(substream != NULL, return -ENXIO);
2856 runtime = substream->runtime;
2857
2858 poll_wait(file, &runtime->sleep, wait);
2859
2860 snd_pcm_stream_lock_irq(substream);
2861 avail = snd_pcm_playback_avail(runtime);
2862 switch (runtime->status->state) {
2863 case SNDRV_PCM_STATE_RUNNING:
2864 case SNDRV_PCM_STATE_PREPARED:
2865 case SNDRV_PCM_STATE_PAUSED:
2866 if (avail >= runtime->control->avail_min) {
2867 mask = POLLOUT | POLLWRNORM;
2868 break;
2869 }
2870 /* Fall through */
2871 case SNDRV_PCM_STATE_DRAINING:
2872 mask = 0;
2873 break;
2874 default:
2875 mask = POLLOUT | POLLWRNORM | POLLERR;
2876 break;
2877 }
2878 snd_pcm_stream_unlock_irq(substream);
2879 return mask;
2880}
2881
2882static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2883{
2884 snd_pcm_file_t *pcm_file;
2885 snd_pcm_substream_t *substream;
2886 snd_pcm_runtime_t *runtime;
2887 unsigned int mask;
2888 snd_pcm_uframes_t avail;
2889
2890 pcm_file = file->private_data;
2891
2892 substream = pcm_file->substream;
2893 snd_assert(substream != NULL, return -ENXIO);
2894 runtime = substream->runtime;
2895
2896 poll_wait(file, &runtime->sleep, wait);
2897
2898 snd_pcm_stream_lock_irq(substream);
2899 avail = snd_pcm_capture_avail(runtime);
2900 switch (runtime->status->state) {
2901 case SNDRV_PCM_STATE_RUNNING:
2902 case SNDRV_PCM_STATE_PREPARED:
2903 case SNDRV_PCM_STATE_PAUSED:
2904 if (avail >= runtime->control->avail_min) {
2905 mask = POLLIN | POLLRDNORM;
2906 break;
2907 }
2908 mask = 0;
2909 break;
2910 case SNDRV_PCM_STATE_DRAINING:
2911 if (avail > 0) {
2912 mask = POLLIN | POLLRDNORM;
2913 break;
2914 }
2915 /* Fall through */
2916 default:
2917 mask = POLLIN | POLLRDNORM | POLLERR;
2918 break;
2919 }
2920 snd_pcm_stream_unlock_irq(substream);
2921 return mask;
2922}
2923
2924/*
2925 * mmap support
2926 */
2927
2928/*
2929 * Only on coherent architectures, we can mmap the status and the control records
2930 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2931 */
2932#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2933/*
2934 * mmap status record
2935 */
2936static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2937{
2938 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2939 snd_pcm_runtime_t *runtime;
2940 struct page * page;
2941
2942 if (substream == NULL)
2943 return NOPAGE_OOM;
2944 runtime = substream->runtime;
2945 page = virt_to_page(runtime->status);
b5810039 2946 get_page(page);
1da177e4
LT		 2947 if (type)
2948 *type = VM_FAULT_MINOR;
2949 return page;
2950}
2951
2952static struct vm_operations_struct snd_pcm_vm_ops_status =
2953{
2954 .nopage = snd_pcm_mmap_status_nopage,
2955};
2956
2957static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
2958 struct vm_area_struct *area)
2959{
2960 snd_pcm_runtime_t *runtime;
2961 long size;
2962 if (!(area->vm_flags & VM_READ))
2963 return -EINVAL;
2964 runtime = substream->runtime;
2965 snd_assert(runtime != NULL, return -EAGAIN);
2966 size = area->vm_end - area->vm_start;
2967 if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t)))
2968 return -EINVAL;
2969 area->vm_ops = &snd_pcm_vm_ops_status;
2970 area->vm_private_data = substream;
2971 area->vm_flags |= VM_RESERVED;
2972 return 0;
2973}
2974
2975/*
2976 * mmap control record
2977 */
2978static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2979{
2980 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2981 snd_pcm_runtime_t *runtime;
2982 struct page * page;
2983
2984 if (substream == NULL)
2985 return NOPAGE_OOM;
2986 runtime = substream->runtime;
2987 page = virt_to_page(runtime->control);
b5810039 2988 get_page(page);
1da177e4
LT		 2989 if (type)
2990 *type = VM_FAULT_MINOR;
2991 return page;
2992}
2993
2994static struct vm_operations_struct snd_pcm_vm_ops_control =
2995{
2996 .nopage = snd_pcm_mmap_control_nopage,
2997};
2998
2999static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file,
3000 struct vm_area_struct *area)
3001{
3002 snd_pcm_runtime_t *runtime;
3003 long size;
3004 if (!(area->vm_flags & VM_READ))
3005 return -EINVAL;
3006 runtime = substream->runtime;
3007 snd_assert(runtime != NULL, return -EAGAIN);
3008 size = area->vm_end - area->vm_start;
3009 if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t)))
3010 return -EINVAL;
3011 area->vm_ops = &snd_pcm_vm_ops_control;
3012 area->vm_private_data = substream;
3013 area->vm_flags |= VM_RESERVED;
3014 return 0;
3015}
3016#else /* ! coherent mmap */
3017/*
3018 * don't support mmap for status and control records.
3019 */
3020static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
3021 struct vm_area_struct *area)
3022{
3023 return -ENXIO;
3024}
3025static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file,
3026 struct vm_area_struct *area)
3027{
3028 return -ENXIO;
3029}
3030#endif /* coherent mmap */
3031
3032/*
3033 * nopage callback for mmapping a RAM page
3034 */
3035static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type)
3036{
3037 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
3038 snd_pcm_runtime_t *runtime;
3039 unsigned long offset;
3040 struct page * page;
3041 void *vaddr;
3042 size_t dma_bytes;
3043
3044 if (substream == NULL)
3045 return NOPAGE_OOM;
3046 runtime = substream->runtime;
3047 offset = area->vm_pgoff << PAGE_SHIFT;
3048 offset += address - area->vm_start;
3049 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3050 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3051 if (offset > dma_bytes - PAGE_SIZE)
3052 return NOPAGE_SIGBUS;
3053 if (substream->ops->page) {
3054 page = substream->ops->page(substream, offset);
3055 if (! page)
3056 return NOPAGE_OOM;
3057 } else {
3058 vaddr = runtime->dma_area + offset;
3059 page = virt_to_page(vaddr);
3060 }
b5810039 3061 get_page(page);
1da177e4
LT		 3062 if (type)
3063 *type = VM_FAULT_MINOR;
3064 return page;
3065}
3066
3067static struct vm_operations_struct snd_pcm_vm_ops_data =
3068{
3069 .open = snd_pcm_mmap_data_open,
3070 .close = snd_pcm_mmap_data_close,
3071 .nopage = snd_pcm_mmap_data_nopage,
3072};
3073
3074/*
3075 * mmap the DMA buffer on RAM
3076 */
3077static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3078{
3079 area->vm_ops = &snd_pcm_vm_ops_data;
3080 area->vm_private_data = substream;
3081 area->vm_flags |= VM_RESERVED;
3082 atomic_inc(&substream->runtime->mmap_count);
3083 return 0;
3084}
3085
3086/*
3087 * mmap the DMA buffer on I/O memory area
3088 */
3089#if SNDRV_PCM_INFO_MMAP_IOMEM
3090static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3091{
3092 .open = snd_pcm_mmap_data_open,
3093 .close = snd_pcm_mmap_data_close,
3094};
3095
3096int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3097{
3098 long size;
3099 unsigned long offset;
3100
3101#ifdef pgprot_noncached
3102 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3103#endif
3104 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3105 area->vm_private_data = substream;
3106 area->vm_flags |= VM_IO;
3107 size = area->vm_end - area->vm_start;
3108 offset = area->vm_pgoff << PAGE_SHIFT;
3109 if (io_remap_pfn_range(area, area->vm_start,
3110 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3111 size, area->vm_page_prot))
3112 return -EAGAIN;
3113 atomic_inc(&substream->runtime->mmap_count);
3114 return 0;
3115}
3116#endif /* SNDRV_PCM_INFO_MMAP */
3117
3118/*
3119 * mmap DMA buffer
3120 */
3121int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file,
3122 struct vm_area_struct *area)
3123{
3124 snd_pcm_runtime_t *runtime;
3125 long size;
3126 unsigned long offset;
3127 size_t dma_bytes;
3128
3129 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3130 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3131 return -EINVAL;
3132 } else {
3133 if (!(area->vm_flags & VM_READ))
3134 return -EINVAL;
3135 }
3136 runtime = substream->runtime;
3137 snd_assert(runtime != NULL, return -EAGAIN);
3138 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3139 return -EBADFD;
3140 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3141 return -ENXIO;
3142 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3143 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3144 return -EINVAL;
3145 size = area->vm_end - area->vm_start;
3146 offset = area->vm_pgoff << PAGE_SHIFT;
3147 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3148 if ((size_t)size > dma_bytes)
3149 return -EINVAL;
3150 if (offset > dma_bytes - size)
3151 return -EINVAL;
3152
3153 if (substream->ops->mmap)
3154 return substream->ops->mmap(substream, area);
3155 else
3156 return snd_pcm_default_mmap(substream, area);
3157}
3158
3159static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3160{
3161 snd_pcm_file_t * pcm_file;
3162 snd_pcm_substream_t *substream;
3163 unsigned long offset;
3164
3165 pcm_file = file->private_data;
3166 substream = pcm_file->substream;
3167 snd_assert(substream != NULL, return -ENXIO);
3168
3169 offset = area->vm_pgoff << PAGE_SHIFT;
3170 switch (offset) {
3171 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3172 if (substream->no_mmap_ctrl)
3173 return -ENXIO;
3174 return snd_pcm_mmap_status(substream, file, area);
3175 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3176 if (substream->no_mmap_ctrl)
3177 return -ENXIO;
3178 return snd_pcm_mmap_control(substream, file, area);
3179 default:
3180 return snd_pcm_mmap_data(substream, file, area);
3181 }
3182 return 0;
3183}
3184
3185static int snd_pcm_fasync(int fd, struct file * file, int on)
3186{
3187 snd_pcm_file_t * pcm_file;
3188 snd_pcm_substream_t *substream;
3189 snd_pcm_runtime_t *runtime;
3190 int err;
3191
3192 pcm_file = file->private_data;
3193 substream = pcm_file->substream;
3194 snd_assert(substream != NULL, return -ENXIO);
3195 runtime = substream->runtime;
3196
3197 err = fasync_helper(fd, file, on, &runtime->fasync);
3198 if (err < 0)
3199 return err;
3200 return 0;
3201}
3202
3203/*
3204 * ioctl32 compat
3205 */
3206#ifdef CONFIG_COMPAT
3207#include "pcm_compat.c"
3208#else
3209#define snd_pcm_ioctl_compat NULL
3210#endif
3211
3212/*
3213 * To be removed helpers to keep binary compatibility
3214 */
3215
3216#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3217#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3218
3219static void snd_pcm_hw_convert_from_old_params(snd_pcm_hw_params_t *params, struct sndrv_pcm_hw_params_old *oparams)
3220{
3221 unsigned int i;
3222
3223 memset(params, 0, sizeof(*params));
3224 params->flags = oparams->flags;
3225 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3226 params->masks[i].bits[0] = oparams->masks[i];
3227 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3228 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3229 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3230 params->info = oparams->info;
3231 params->msbits = oparams->msbits;
3232 params->rate_num = oparams->rate_num;
3233 params->rate_den = oparams->rate_den;
3234 params->fifo_size = oparams->fifo_size;
3235}
3236
3237static void snd_pcm_hw_convert_to_old_params(struct sndrv_pcm_hw_params_old *oparams, snd_pcm_hw_params_t *params)
3238{
3239 unsigned int i;
3240
3241 memset(oparams, 0, sizeof(*oparams));
3242 oparams->flags = params->flags;
3243 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3244 oparams->masks[i] = params->masks[i].bits[0];
3245 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3246 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3247 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3248 oparams->info = params->info;
3249 oparams->msbits = params->msbits;
3250 oparams->rate_num = params->rate_num;
3251 oparams->rate_den = params->rate_den;
3252 oparams->fifo_size = params->fifo_size;
3253}
3254
3255static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3256{
3257 snd_pcm_hw_params_t *params;
3258 struct sndrv_pcm_hw_params_old *oparams = NULL;
3259 int err;
3260
3261 params = kmalloc(sizeof(*params), GFP_KERNEL);
3262 if (!params) {
3263 err = -ENOMEM;
3264 goto out;
3265 }
3266 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3267 if (!oparams) {
3268 err = -ENOMEM;
3269 goto out;
3270 }
3271
3272 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3273 err = -EFAULT;
3274 goto out;
3275 }
3276 snd_pcm_hw_convert_from_old_params(params, oparams);
3277 err = snd_pcm_hw_refine(substream, params);
3278 snd_pcm_hw_convert_to_old_params(oparams, params);
3279 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3280 if (!err)
3281 err = -EFAULT;
3282 }
3283out:
3284 kfree(params);
3285 kfree(oparams);
3286 return err;
3287}
3288
3289static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3290{
3291 snd_pcm_hw_params_t *params;
3292 struct sndrv_pcm_hw_params_old *oparams = NULL;
3293 int err;
3294
3295 params = kmalloc(sizeof(*params), GFP_KERNEL);
3296 if (!params) {
3297 err = -ENOMEM;
3298 goto out;
3299 }
3300 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3301 if (!oparams) {
3302 err = -ENOMEM;
3303 goto out;
3304 }
3305 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3306 err = -EFAULT;
3307 goto out;
3308 }
3309 snd_pcm_hw_convert_from_old_params(params, oparams);
3310 err = snd_pcm_hw_params(substream, params);
3311 snd_pcm_hw_convert_to_old_params(oparams, params);
3312 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3313 if (!err)
3314 err = -EFAULT;
3315 }
3316out:
3317 kfree(params);
3318 kfree(oparams);
3319 return err;
3320}
3321
3322/*
3323 * Register section
3324 */
3325
3326static struct file_operations snd_pcm_f_ops_playback = {
3327 .owner = THIS_MODULE,
3328 .write = snd_pcm_write,
3329 .writev = snd_pcm_writev,
3330 .open = snd_pcm_open,
3331 .release = snd_pcm_release,
3332 .poll = snd_pcm_playback_poll,
3333 .unlocked_ioctl = snd_pcm_playback_ioctl,
3334 .compat_ioctl = snd_pcm_ioctl_compat,
3335 .mmap = snd_pcm_mmap,
3336 .fasync = snd_pcm_fasync,
3337};
3338
3339static struct file_operations snd_pcm_f_ops_capture = {
3340 .owner = THIS_MODULE,
3341 .read = snd_pcm_read,
3342 .readv = snd_pcm_readv,
3343 .open = snd_pcm_open,
3344 .release = snd_pcm_release,
3345 .poll = snd_pcm_capture_poll,
3346 .unlocked_ioctl = snd_pcm_capture_ioctl,
3347 .compat_ioctl = snd_pcm_ioctl_compat,
3348 .mmap = snd_pcm_mmap,
3349 .fasync = snd_pcm_fasync,
3350};
3351
3352snd_minor_t snd_pcm_reg[2] =
3353{
3354 {
3355 .comment = "digital audio playback",
3356 .f_ops = &snd_pcm_f_ops_playback,
3357 },
3358 {
3359 .comment = "digital audio capture",
3360 .f_ops = &snd_pcm_f_ops_capture,
3361 }
3362};