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[ALSA] pcm_oss: fix snd_pcm_oss_release() oops
[net-next-2.6.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
877211f5 42struct snd_pcm_hw_params_old {
1da177e4
LT		 43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
877211f5 54 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 55 unsigned char reserved[64];
56};
57
59d48582 58#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 59#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 61
877211f5
TI		 62static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 66#endif
f87135f5 67static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 68
69/*
70 *
71 */
72
73DEFINE_RWLOCK(snd_pcm_link_rwlock);
74static DECLARE_RWSEM(snd_pcm_link_rwsem);
75
76
77static inline mm_segment_t snd_enter_user(void)
78{
79 mm_segment_t fs = get_fs();
80 set_fs(get_ds());
81 return fs;
82}
83
84static inline void snd_leave_user(mm_segment_t fs)
85{
86 set_fs(fs);
87}
88
89
90
877211f5 91int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 92{
877211f5
TI		 93 struct snd_pcm_runtime *runtime;
94 struct snd_pcm *pcm = substream->pcm;
95 struct snd_pcm_str *pstr = substream->pstr;
1da177e4
LT		 96
97 snd_assert(substream != NULL, return -ENXIO);
98 memset(info, 0, sizeof(*info));
99 info->card = pcm->card->number;
100 info->device = pcm->device;
101 info->stream = substream->stream;
102 info->subdevice = substream->number;
103 strlcpy(info->id, pcm->id, sizeof(info->id));
104 strlcpy(info->name, pcm->name, sizeof(info->name));
105 info->dev_class = pcm->dev_class;
106 info->dev_subclass = pcm->dev_subclass;
107 info->subdevices_count = pstr->substream_count;
108 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
109 strlcpy(info->subname, substream->name, sizeof(info->subname));
110 runtime = substream->runtime;
111 /* AB: FIXME!!! This is definitely nonsense */
112 if (runtime) {
113 info->sync = runtime->sync;
114 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
115 }
116 return 0;
117}
118
877211f5
TI		 119int snd_pcm_info_user(struct snd_pcm_substream *substream,
120 struct snd_pcm_info __user * _info)
1da177e4 121{
877211f5 122 struct snd_pcm_info *info;
1da177e4
LT		 123 int err;
124
125 info = kmalloc(sizeof(*info), GFP_KERNEL);
126 if (! info)
127 return -ENOMEM;
128 err = snd_pcm_info(substream, info);
129 if (err >= 0) {
130 if (copy_to_user(_info, info, sizeof(*info)))
131 err = -EFAULT;
132 }
133 kfree(info);
134 return err;
135}
136
137#undef RULES_DEBUG
138
139#ifdef RULES_DEBUG
140#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
141char *snd_pcm_hw_param_names[] = {
142 HW_PARAM(ACCESS),
143 HW_PARAM(FORMAT),
144 HW_PARAM(SUBFORMAT),
145 HW_PARAM(SAMPLE_BITS),
146 HW_PARAM(FRAME_BITS),
147 HW_PARAM(CHANNELS),
148 HW_PARAM(RATE),
149 HW_PARAM(PERIOD_TIME),
150 HW_PARAM(PERIOD_SIZE),
151 HW_PARAM(PERIOD_BYTES),
152 HW_PARAM(PERIODS),
153 HW_PARAM(BUFFER_TIME),
154 HW_PARAM(BUFFER_SIZE),
155 HW_PARAM(BUFFER_BYTES),
156 HW_PARAM(TICK_TIME),
157};
158#endif
159
877211f5
TI		 160int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
161 struct snd_pcm_hw_params *params)
1da177e4
LT		 162{
163 unsigned int k;
877211f5
TI		 164 struct snd_pcm_hardware *hw;
165 struct snd_interval *i = NULL;
166 struct snd_mask *m = NULL;
167 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 168 unsigned int rstamps[constrs->rules_num];
169 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
170 unsigned int stamp = 2;
171 int changed, again;
172
173 params->info = 0;
174 params->fifo_size = 0;
175 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
176 params->msbits = 0;
177 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
178 params->rate_num = 0;
179 params->rate_den = 0;
180 }
181
182 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
183 m = hw_param_mask(params, k);
184 if (snd_mask_empty(m))
185 return -EINVAL;
186 if (!(params->rmask & (1 << k)))
187 continue;
188#ifdef RULES_DEBUG
189 printk("%s = ", snd_pcm_hw_param_names[k]);
190 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
191#endif
192 changed = snd_mask_refine(m, constrs_mask(constrs, k));
193#ifdef RULES_DEBUG
194 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195#endif
196 if (changed)
197 params->cmask |= 1 << k;
198 if (changed < 0)
199 return changed;
200 }
201
202 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
203 i = hw_param_interval(params, k);
204 if (snd_interval_empty(i))
205 return -EINVAL;
206 if (!(params->rmask & (1 << k)))
207 continue;
208#ifdef RULES_DEBUG
209 printk("%s = ", snd_pcm_hw_param_names[k]);
210 if (i->empty)
211 printk("empty");
212 else
213 printk("%c%u %u%c",
214 i->openmin ? '(' : '[', i->min,
215 i->max, i->openmax ? ')' : ']');
216 printk(" -> ");
217#endif
218 changed = snd_interval_refine(i, constrs_interval(constrs, k));
219#ifdef RULES_DEBUG
220 if (i->empty)
221 printk("empty\n");
222 else
223 printk("%c%u %u%c\n",
224 i->openmin ? '(' : '[', i->min,
225 i->max, i->openmax ? ')' : ']');
226#endif
227 if (changed)
228 params->cmask |= 1 << k;
229 if (changed < 0)
230 return changed;
231 }
232
233 for (k = 0; k < constrs->rules_num; k++)
234 rstamps[k] = 0;
235 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
236 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
237 do {
238 again = 0;
239 for (k = 0; k < constrs->rules_num; k++) {
877211f5 240 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 241 unsigned int d;
242 int doit = 0;
243 if (r->cond && !(r->cond & params->flags))
244 continue;
245 for (d = 0; r->deps[d] >= 0; d++) {
246 if (vstamps[r->deps[d]] > rstamps[k]) {
247 doit = 1;
248 break;
249 }
250 }
251 if (!doit)
252 continue;
253#ifdef RULES_DEBUG
254 printk("Rule %d [%p]: ", k, r->func);
255 if (r->var >= 0) {
256 printk("%s = ", snd_pcm_hw_param_names[r->var]);
257 if (hw_is_mask(r->var)) {
258 m = hw_param_mask(params, r->var);
259 printk("%x", *m->bits);
260 } else {
261 i = hw_param_interval(params, r->var);
262 if (i->empty)
263 printk("empty");
264 else
265 printk("%c%u %u%c",
266 i->openmin ? '(' : '[', i->min,
267 i->max, i->openmax ? ')' : ']');
268 }
269 }
270#endif
271 changed = r->func(params, r);
272#ifdef RULES_DEBUG
273 if (r->var >= 0) {
274 printk(" -> ");
275 if (hw_is_mask(r->var))
276 printk("%x", *m->bits);
277 else {
278 if (i->empty)
279 printk("empty");
280 else
281 printk("%c%u %u%c",
282 i->openmin ? '(' : '[', i->min,
283 i->max, i->openmax ? ')' : ']');
284 }
285 }
286 printk("\n");
287#endif
288 rstamps[k] = stamp;
289 if (changed && r->var >= 0) {
290 params->cmask |= (1 << r->var);
291 vstamps[r->var] = stamp;
292 again = 1;
293 }
294 if (changed < 0)
295 return changed;
296 stamp++;
297 }
298 } while (again);
299 if (!params->msbits) {
300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
301 if (snd_interval_single(i))
302 params->msbits = snd_interval_value(i);
303 }
304
305 if (!params->rate_den) {
306 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
307 if (snd_interval_single(i)) {
308 params->rate_num = snd_interval_value(i);
309 params->rate_den = 1;
310 }
311 }
312
313 hw = &substream->runtime->hw;
314 if (!params->info)
315 params->info = hw->info;
316 if (!params->fifo_size)
317 params->fifo_size = hw->fifo_size;
318 params->rmask = 0;
319 return 0;
320}
321
877211f5
TI		 322static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
323 struct snd_pcm_hw_params __user * _params)
1da177e4 324{
877211f5 325 struct snd_pcm_hw_params *params;
1da177e4
LT		 326 int err;
327
328 params = kmalloc(sizeof(*params), GFP_KERNEL);
329 if (!params) {
330 err = -ENOMEM;
331 goto out;
332 }
333 if (copy_from_user(params, _params, sizeof(*params))) {
334 err = -EFAULT;
335 goto out;
336 }
337 err = snd_pcm_hw_refine(substream, params);
338 if (copy_to_user(_params, params, sizeof(*params))) {
339 if (!err)
340 err = -EFAULT;
341 }
342out:
343 kfree(params);
344 return err;
345}
346
877211f5
TI		 347static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
348 struct snd_pcm_hw_params *params)
1da177e4 349{
877211f5 350 struct snd_pcm_runtime *runtime;
1da177e4
LT		 351 int err;
352 unsigned int bits;
353 snd_pcm_uframes_t frames;
354
355 snd_assert(substream != NULL, return -ENXIO);
356 runtime = substream->runtime;
357 snd_assert(runtime != NULL, return -ENXIO);
358 snd_pcm_stream_lock_irq(substream);
359 switch (runtime->status->state) {
360 case SNDRV_PCM_STATE_OPEN:
361 case SNDRV_PCM_STATE_SETUP:
362 case SNDRV_PCM_STATE_PREPARED:
363 break;
364 default:
365 snd_pcm_stream_unlock_irq(substream);
366 return -EBADFD;
367 }
368 snd_pcm_stream_unlock_irq(substream);
369#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
370 if (!substream->oss.oss)
371#endif
372 if (atomic_read(&runtime->mmap_count))
373 return -EBADFD;
374
375 params->rmask = ~0U;
376 err = snd_pcm_hw_refine(substream, params);
377 if (err < 0)
378 goto _error;
379
380 err = snd_pcm_hw_params_choose(substream, params);
381 if (err < 0)
382 goto _error;
383
384 if (substream->ops->hw_params != NULL) {
385 err = substream->ops->hw_params(substream, params);
386 if (err < 0)
387 goto _error;
388 }
389
390 runtime->access = params_access(params);
391 runtime->format = params_format(params);
392 runtime->subformat = params_subformat(params);
393 runtime->channels = params_channels(params);
394 runtime->rate = params_rate(params);
395 runtime->period_size = params_period_size(params);
396 runtime->periods = params_periods(params);
397 runtime->buffer_size = params_buffer_size(params);
398 runtime->tick_time = params_tick_time(params);
399 runtime->info = params->info;
400 runtime->rate_num = params->rate_num;
401 runtime->rate_den = params->rate_den;
402
403 bits = snd_pcm_format_physical_width(runtime->format);
404 runtime->sample_bits = bits;
405 bits *= runtime->channels;
406 runtime->frame_bits = bits;
407 frames = 1;
408 while (bits % 8 != 0) {
409 bits *= 2;
410 frames *= 2;
411 }
412 runtime->byte_align = bits / 8;
413 runtime->min_align = frames;
414
415 /* Default sw params */
416 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
417 runtime->period_step = 1;
418 runtime->sleep_min = 0;
419 runtime->control->avail_min = runtime->period_size;
420 runtime->xfer_align = runtime->period_size;
421 runtime->start_threshold = 1;
422 runtime->stop_threshold = runtime->buffer_size;
423 runtime->silence_threshold = 0;
424 runtime->silence_size = 0;
425 runtime->boundary = runtime->buffer_size;
426 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
427 runtime->boundary *= 2;
428
429 snd_pcm_timer_resolution_change(substream);
430 runtime->status->state = SNDRV_PCM_STATE_SETUP;
431 return 0;
432 _error:
433 /* hardware might be unuseable from this time,
434 so we force application to retry to set
435 the correct hardware parameter settings */
436 runtime->status->state = SNDRV_PCM_STATE_OPEN;
437 if (substream->ops->hw_free != NULL)
438 substream->ops->hw_free(substream);
439 return err;
440}
441
877211f5
TI		 442static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
443 struct snd_pcm_hw_params __user * _params)
1da177e4 444{
877211f5 445 struct snd_pcm_hw_params *params;
1da177e4
LT		 446 int err;
447
448 params = kmalloc(sizeof(*params), GFP_KERNEL);
449 if (!params) {
450 err = -ENOMEM;
451 goto out;
452 }
453 if (copy_from_user(params, _params, sizeof(*params))) {
454 err = -EFAULT;
455 goto out;
456 }
457 err = snd_pcm_hw_params(substream, params);
458 if (copy_to_user(_params, params, sizeof(*params))) {
459 if (!err)
460 err = -EFAULT;
461 }
462out:
463 kfree(params);
464 return err;
465}
466
877211f5 467static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 468{
877211f5 469 struct snd_pcm_runtime *runtime;
1da177e4
LT		 470 int result = 0;
471
472 snd_assert(substream != NULL, return -ENXIO);
473 runtime = substream->runtime;
474 snd_assert(runtime != NULL, return -ENXIO);
475 snd_pcm_stream_lock_irq(substream);
476 switch (runtime->status->state) {
477 case SNDRV_PCM_STATE_SETUP:
478 case SNDRV_PCM_STATE_PREPARED:
479 break;
480 default:
481 snd_pcm_stream_unlock_irq(substream);
482 return -EBADFD;
483 }
484 snd_pcm_stream_unlock_irq(substream);
485 if (atomic_read(&runtime->mmap_count))
486 return -EBADFD;
487 if (substream->ops->hw_free)
488 result = substream->ops->hw_free(substream);
489 runtime->status->state = SNDRV_PCM_STATE_OPEN;
490 return result;
491}
492
877211f5
TI		 493static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
494 struct snd_pcm_sw_params *params)
1da177e4 495{
877211f5 496 struct snd_pcm_runtime *runtime;
1da177e4
LT		 497
498 snd_assert(substream != NULL, return -ENXIO);
499 runtime = substream->runtime;
500 snd_assert(runtime != NULL, return -ENXIO);
501 snd_pcm_stream_lock_irq(substream);
502 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
503 snd_pcm_stream_unlock_irq(substream);
504 return -EBADFD;
505 }
506 snd_pcm_stream_unlock_irq(substream);
507
508 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
509 return -EINVAL;
510 if (params->avail_min == 0)
511 return -EINVAL;
512 if (params->xfer_align == 0 ||
513 params->xfer_align % runtime->min_align != 0)
514 return -EINVAL;
515 if (params->silence_size >= runtime->boundary) {
516 if (params->silence_threshold != 0)
517 return -EINVAL;
518 } else {
519 if (params->silence_size > params->silence_threshold)
520 return -EINVAL;
521 if (params->silence_threshold > runtime->buffer_size)
522 return -EINVAL;
523 }
524 snd_pcm_stream_lock_irq(substream);
525 runtime->tstamp_mode = params->tstamp_mode;
526 runtime->sleep_min = params->sleep_min;
527 runtime->period_step = params->period_step;
528 runtime->control->avail_min = params->avail_min;
529 runtime->start_threshold = params->start_threshold;
530 runtime->stop_threshold = params->stop_threshold;
531 runtime->silence_threshold = params->silence_threshold;
532 runtime->silence_size = params->silence_size;
533 runtime->xfer_align = params->xfer_align;
534 params->boundary = runtime->boundary;
535 if (snd_pcm_running(substream)) {
536 if (runtime->sleep_min)
537 snd_pcm_tick_prepare(substream);
538 else
539 snd_pcm_tick_set(substream, 0);
540 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
541 runtime->silence_size > 0)
542 snd_pcm_playback_silence(substream, ULONG_MAX);
543 wake_up(&runtime->sleep);
544 }
545 snd_pcm_stream_unlock_irq(substream);
546 return 0;
547}
548
877211f5
TI		 549static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
550 struct snd_pcm_sw_params __user * _params)
1da177e4 551{
877211f5 552 struct snd_pcm_sw_params params;
1da177e4
LT		 553 int err;
554 if (copy_from_user(&params, _params, sizeof(params)))
555 return -EFAULT;
556 err = snd_pcm_sw_params(substream, &params);
557 if (copy_to_user(_params, &params, sizeof(params)))
558 return -EFAULT;
559 return err;
560}
561
877211f5
TI		 562int snd_pcm_status(struct snd_pcm_substream *substream,
563 struct snd_pcm_status *status)
1da177e4 564{
877211f5 565 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 566
567 snd_pcm_stream_lock_irq(substream);
568 status->state = runtime->status->state;
569 status->suspended_state = runtime->status->suspended_state;
570 if (status->state == SNDRV_PCM_STATE_OPEN)
571 goto _end;
572 status->trigger_tstamp = runtime->trigger_tstamp;
573 if (snd_pcm_running(substream)) {
574 snd_pcm_update_hw_ptr(substream);
575 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
576 status->tstamp = runtime->status->tstamp;
577 else
07799e75 578 getnstimeofday(&status->tstamp);
1da177e4 579 } else
07799e75 580 getnstimeofday(&status->tstamp);
1da177e4
LT		 581 status->appl_ptr = runtime->control->appl_ptr;
582 status->hw_ptr = runtime->status->hw_ptr;
583 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
584 status->avail = snd_pcm_playback_avail(runtime);
585 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
586 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
587 status->delay = runtime->buffer_size - status->avail;
588 else
589 status->delay = 0;
590 } else {
591 status->avail = snd_pcm_capture_avail(runtime);
592 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
593 status->delay = status->avail;
594 else
595 status->delay = 0;
596 }
597 status->avail_max = runtime->avail_max;
598 status->overrange = runtime->overrange;
599 runtime->avail_max = 0;
600 runtime->overrange = 0;
601 _end:
602 snd_pcm_stream_unlock_irq(substream);
603 return 0;
604}
605
877211f5
TI		 606static int snd_pcm_status_user(struct snd_pcm_substream *substream,
607 struct snd_pcm_status __user * _status)
1da177e4 608{
877211f5
TI		 609 struct snd_pcm_status status;
610 struct snd_pcm_runtime *runtime;
1da177e4
LT		 611 int res;
612
613 snd_assert(substream != NULL, return -ENXIO);
614 runtime = substream->runtime;
615 memset(&status, 0, sizeof(status));
616 res = snd_pcm_status(substream, &status);
617 if (res < 0)
618 return res;
619 if (copy_to_user(_status, &status, sizeof(status)))
620 return -EFAULT;
621 return 0;
622}
623
877211f5
TI		 624static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
625 struct snd_pcm_channel_info * info)
1da177e4 626{
877211f5 627 struct snd_pcm_runtime *runtime;
1da177e4
LT		 628 unsigned int channel;
629
630 snd_assert(substream != NULL, return -ENXIO);
631 channel = info->channel;
632 runtime = substream->runtime;
633 snd_pcm_stream_lock_irq(substream);
634 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
635 snd_pcm_stream_unlock_irq(substream);
636 return -EBADFD;
637 }
638 snd_pcm_stream_unlock_irq(substream);
639 if (channel >= runtime->channels)
640 return -EINVAL;
641 memset(info, 0, sizeof(*info));
642 info->channel = channel;
643 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
644}
645
877211f5
TI		 646static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
647 struct snd_pcm_channel_info __user * _info)
1da177e4 648{
877211f5 649 struct snd_pcm_channel_info info;
1da177e4
LT		 650 int res;
651
652 if (copy_from_user(&info, _info, sizeof(info)))
653 return -EFAULT;
654 res = snd_pcm_channel_info(substream, &info);
655 if (res < 0)
656 return res;
657 if (copy_to_user(_info, &info, sizeof(info)))
658 return -EFAULT;
659 return 0;
660}
661
877211f5 662static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 663{
877211f5 664 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 665 if (runtime->trigger_master == NULL)
666 return;
667 if (runtime->trigger_master == substream) {
07799e75 668 getnstimeofday(&runtime->trigger_tstamp);
1da177e4
LT		 669 } else {
670 snd_pcm_trigger_tstamp(runtime->trigger_master);
671 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
672 }
673 runtime->trigger_master = NULL;
674}
675
676struct action_ops {
877211f5
TI		 677 int (*pre_action)(struct snd_pcm_substream *substream, int state);
678 int (*do_action)(struct snd_pcm_substream *substream, int state);
679 void (*undo_action)(struct snd_pcm_substream *substream, int state);
680 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 681};
682
683/*
684 * this functions is core for handling of linked stream
685 * Note: the stream state might be changed also on failure
686 * Note2: call with calling stream lock + link lock
687 */
688static int snd_pcm_action_group(struct action_ops *ops,
877211f5 689 struct snd_pcm_substream *substream,
1da177e4
LT		 690 int state, int do_lock)
691{
692 struct list_head *pos;
877211f5
TI		 693 struct snd_pcm_substream *s = NULL;
694 struct snd_pcm_substream *s1;
1da177e4
LT		 695 int res = 0;
696
697 snd_pcm_group_for_each(pos, substream) {
698 s = snd_pcm_group_substream_entry(pos);
699 if (do_lock && s != substream)
700 spin_lock(&s->self_group.lock);
701 res = ops->pre_action(s, state);
702 if (res < 0)
703 goto _unlock;
704 }
705 snd_pcm_group_for_each(pos, substream) {
706 s = snd_pcm_group_substream_entry(pos);
707 res = ops->do_action(s, state);
708 if (res < 0) {
709 if (ops->undo_action) {
710 snd_pcm_group_for_each(pos, substream) {
711 s1 = snd_pcm_group_substream_entry(pos);
712 if (s1 == s) /* failed stream */
713 break;
714 ops->undo_action(s1, state);
715 }
716 }
717 s = NULL; /* unlock all */
718 goto _unlock;
719 }
720 }
721 snd_pcm_group_for_each(pos, substream) {
722 s = snd_pcm_group_substream_entry(pos);
723 ops->post_action(s, state);
724 }
725 _unlock:
726 if (do_lock) {
727 /* unlock streams */
728 snd_pcm_group_for_each(pos, substream) {
729 s1 = snd_pcm_group_substream_entry(pos);
730 if (s1 != substream)
731 spin_unlock(&s1->self_group.lock);
732 if (s1 == s) /* end */
733 break;
734 }
735 }
736 return res;
737}
738
739/*
740 * Note: call with stream lock
741 */
742static int snd_pcm_action_single(struct action_ops *ops,
877211f5 743 struct snd_pcm_substream *substream,
1da177e4
LT		 744 int state)
745{
746 int res;
747
748 res = ops->pre_action(substream, state);
749 if (res < 0)
750 return res;
751 res = ops->do_action(substream, state);
752 if (res == 0)
753 ops->post_action(substream, state);
754 else if (ops->undo_action)
755 ops->undo_action(substream, state);
756 return res;
757}
758
759/*
760 * Note: call with stream lock
761 */
762static int snd_pcm_action(struct action_ops *ops,
877211f5 763 struct snd_pcm_substream *substream,
1da177e4
LT		 764 int state)
765{
766 int res;
767
768 if (snd_pcm_stream_linked(substream)) {
769 if (!spin_trylock(&substream->group->lock)) {
770 spin_unlock(&substream->self_group.lock);
771 spin_lock(&substream->group->lock);
772 spin_lock(&substream->self_group.lock);
773 }
774 res = snd_pcm_action_group(ops, substream, state, 1);
775 spin_unlock(&substream->group->lock);
776 } else {
777 res = snd_pcm_action_single(ops, substream, state);
778 }
779 return res;
780}
781
782/*
783 * Note: don't use any locks before
784 */
785static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 786 struct snd_pcm_substream *substream,
1da177e4
LT		 787 int state)
788{
789 int res;
790
791 read_lock_irq(&snd_pcm_link_rwlock);
792 if (snd_pcm_stream_linked(substream)) {
793 spin_lock(&substream->group->lock);
794 spin_lock(&substream->self_group.lock);
795 res = snd_pcm_action_group(ops, substream, state, 1);
796 spin_unlock(&substream->self_group.lock);
797 spin_unlock(&substream->group->lock);
798 } else {
799 spin_lock(&substream->self_group.lock);
800 res = snd_pcm_action_single(ops, substream, state);
801 spin_unlock(&substream->self_group.lock);
802 }
803 read_unlock_irq(&snd_pcm_link_rwlock);
804 return res;
805}
806
807/*
808 */
809static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 810 struct snd_pcm_substream *substream,
1da177e4
LT		 811 int state)
812{
813 int res;
814
815 down_read(&snd_pcm_link_rwsem);
816 if (snd_pcm_stream_linked(substream))
817 res = snd_pcm_action_group(ops, substream, state, 0);
818 else
819 res = snd_pcm_action_single(ops, substream, state);
820 up_read(&snd_pcm_link_rwsem);
821 return res;
822}
823
824/*
825 * start callbacks
826 */
877211f5 827static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 828{
877211f5 829 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 830 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
831 return -EBADFD;
832 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
833 !snd_pcm_playback_data(substream))
834 return -EPIPE;
835 runtime->trigger_master = substream;
836 return 0;
837}
838
877211f5 839static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 840{
841 if (substream->runtime->trigger_master != substream)
842 return 0;
843 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
844}
845
877211f5 846static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 847{
848 if (substream->runtime->trigger_master == substream)
849 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
850}
851
877211f5 852static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 853{
877211f5 854 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 855 snd_pcm_trigger_tstamp(substream);
856 runtime->status->state = state;
857 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
858 runtime->silence_size > 0)
859 snd_pcm_playback_silence(substream, ULONG_MAX);
860 if (runtime->sleep_min)
861 snd_pcm_tick_prepare(substream);
862 if (substream->timer)
877211f5
TI		 863 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
864 &runtime->trigger_tstamp);
1da177e4
LT		 865}
866
867static struct action_ops snd_pcm_action_start = {
868 .pre_action = snd_pcm_pre_start,
869 .do_action = snd_pcm_do_start,
870 .undo_action = snd_pcm_undo_start,
871 .post_action = snd_pcm_post_start
872};
873
874/**
875 * snd_pcm_start
df8db936 876 * @substream: the PCM substream instance
1da177e4
LT		 877 *
878 * Start all linked streams.
879 */
877211f5 880int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 881{
877211f5
TI		 882 return snd_pcm_action(&snd_pcm_action_start, substream,
883 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 884}
885
886/*
887 * stop callbacks
888 */
877211f5 889static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 890{
877211f5 891 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 892 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
893 return -EBADFD;
894 runtime->trigger_master = substream;
895 return 0;
896}
897
877211f5 898static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 899{
900 if (substream->runtime->trigger_master == substream &&
901 snd_pcm_running(substream))
902 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
903 return 0; /* unconditonally stop all substreams */
904}
905
877211f5 906static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 907{
877211f5 908 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 909 if (runtime->status->state != state) {
910 snd_pcm_trigger_tstamp(substream);
911 if (substream->timer)
877211f5
TI		 912 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
913 &runtime->trigger_tstamp);
1da177e4
LT		 914 runtime->status->state = state;
915 snd_pcm_tick_set(substream, 0);
916 }
917 wake_up(&runtime->sleep);
918}
919
920static struct action_ops snd_pcm_action_stop = {
921 .pre_action = snd_pcm_pre_stop,
922 .do_action = snd_pcm_do_stop,
923 .post_action = snd_pcm_post_stop
924};
925
926/**
927 * snd_pcm_stop
df8db936
TI		 928 * @substream: the PCM substream instance
929 * @state: PCM state after stopping the stream
1da177e4
LT		 930 *
931 * Try to stop all running streams in the substream group.
932 * The state of each stream is changed to the given value after that unconditionally.
933 */
877211f5 934int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 935{
936 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
937}
938
939/**
940 * snd_pcm_drain_done
df8db936 941 * @substream: the PCM substream
1da177e4
LT		 942 *
943 * Stop the DMA only when the given stream is playback.
944 * The state is changed to SETUP.
945 * Unlike snd_pcm_stop(), this affects only the given stream.
946 */
877211f5 947int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 948{
877211f5
TI		 949 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
950 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 951}
952
953/*
954 * pause callbacks
955 */
877211f5 956static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 957{
877211f5 958 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 959 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
960 return -ENOSYS;
961 if (push) {
962 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
963 return -EBADFD;
964 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
965 return -EBADFD;
966 runtime->trigger_master = substream;
967 return 0;
968}
969
877211f5 970static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 971{
972 if (substream->runtime->trigger_master != substream)
973 return 0;
974 return substream->ops->trigger(substream,
975 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
976 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
977}
978
877211f5 979static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 980{
981 if (substream->runtime->trigger_master == substream)
982 substream->ops->trigger(substream,
983 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
984 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
985}
986
877211f5 987static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 988{
877211f5 989 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 990 snd_pcm_trigger_tstamp(substream);
991 if (push) {
992 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
993 if (substream->timer)
877211f5
TI		 994 snd_timer_notify(substream->timer,
995 SNDRV_TIMER_EVENT_MPAUSE,
996 &runtime->trigger_tstamp);
1da177e4
LT		 997 snd_pcm_tick_set(substream, 0);
998 wake_up(&runtime->sleep);
999 } else {
1000 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1001 if (runtime->sleep_min)
1002 snd_pcm_tick_prepare(substream);
1003 if (substream->timer)
877211f5
TI		 1004 snd_timer_notify(substream->timer,
1005 SNDRV_TIMER_EVENT_MCONTINUE,
1006 &runtime->trigger_tstamp);
1da177e4
LT		 1007 }
1008}
1009
1010static struct action_ops snd_pcm_action_pause = {
1011 .pre_action = snd_pcm_pre_pause,
1012 .do_action = snd_pcm_do_pause,
1013 .undo_action = snd_pcm_undo_pause,
1014 .post_action = snd_pcm_post_pause
1015};
1016
1017/*
1018 * Push/release the pause for all linked streams.
1019 */
877211f5 1020static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1021{
1022 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1023}
1024
1025#ifdef CONFIG_PM
1026/* suspend */
1027
877211f5 1028static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1029{
877211f5 1030 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1031 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1032 return -EBUSY;
1033 runtime->trigger_master = substream;
1034 return 0;
1035}
1036
877211f5 1037static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1038{
877211f5 1039 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1040 if (runtime->trigger_master != substream)
1041 return 0;
1042 if (! snd_pcm_running(substream))
1043 return 0;
1044 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1045 return 0; /* suspend unconditionally */
1046}
1047
877211f5 1048static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1049{
877211f5 1050 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1051 snd_pcm_trigger_tstamp(substream);
1052 if (substream->timer)
877211f5
TI		 1053 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1054 &runtime->trigger_tstamp);
1da177e4
LT		 1055 runtime->status->suspended_state = runtime->status->state;
1056 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1057 snd_pcm_tick_set(substream, 0);
1058 wake_up(&runtime->sleep);
1059}
1060
1061static struct action_ops snd_pcm_action_suspend = {
1062 .pre_action = snd_pcm_pre_suspend,
1063 .do_action = snd_pcm_do_suspend,
1064 .post_action = snd_pcm_post_suspend
1065};
1066
1067/**
1068 * snd_pcm_suspend
df8db936 1069 * @substream: the PCM substream
1da177e4
LT		 1070 *
1071 * Trigger SUSPEND to all linked streams.
1072 * After this call, all streams are changed to SUSPENDED state.
1073 */
877211f5 1074int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1075{
1076 int err;
1077 unsigned long flags;
1078
603bf524
TI		 1079 if (! substream)
1080 return 0;
1081
1da177e4
LT		 1082 snd_pcm_stream_lock_irqsave(substream, flags);
1083 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1084 snd_pcm_stream_unlock_irqrestore(substream, flags);
1085 return err;
1086}
1087
1088/**
1089 * snd_pcm_suspend_all
df8db936 1090 * @pcm: the PCM instance
1da177e4
LT		 1091 *
1092 * Trigger SUSPEND to all substreams in the given pcm.
1093 * After this call, all streams are changed to SUSPENDED state.
1094 */
877211f5 1095int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1096{
877211f5 1097 struct snd_pcm_substream *substream;
1da177e4
LT		 1098 int stream, err = 0;
1099
603bf524
TI		 1100 if (! pcm)
1101 return 0;
1102
1da177e4 1103 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1104 for (substream = pcm->streams[stream].substream;
1105 substream; substream = substream->next) {
1da177e4
LT		 1106 /* FIXME: the open/close code should lock this as well */
1107 if (substream->runtime == NULL)
1108 continue;
1109 err = snd_pcm_suspend(substream);
1110 if (err < 0 && err != -EBUSY)
1111 return err;
1112 }
1113 }
1114 return 0;
1115}
1116
1117/* resume */
1118
877211f5 1119static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1120{
877211f5 1121 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1122 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1123 return -ENOSYS;
1124 runtime->trigger_master = substream;
1125 return 0;
1126}
1127
877211f5 1128static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1129{
877211f5 1130 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1131 if (runtime->trigger_master != substream)
1132 return 0;
1133 /* DMA not running previously? */
1134 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1135 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1136 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1137 return 0;
1138 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1139}
1140
877211f5 1141static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1142{
1143 if (substream->runtime->trigger_master == substream &&
1144 snd_pcm_running(substream))
1145 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1146}
1147
877211f5 1148static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1149{
877211f5 1150 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1151 snd_pcm_trigger_tstamp(substream);
1152 if (substream->timer)
877211f5
TI		 1153 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1154 &runtime->trigger_tstamp);
1da177e4
LT		 1155 runtime->status->state = runtime->status->suspended_state;
1156 if (runtime->sleep_min)
1157 snd_pcm_tick_prepare(substream);
1158}
1159
1160static struct action_ops snd_pcm_action_resume = {
1161 .pre_action = snd_pcm_pre_resume,
1162 .do_action = snd_pcm_do_resume,
1163 .undo_action = snd_pcm_undo_resume,
1164 .post_action = snd_pcm_post_resume
1165};
1166
877211f5 1167static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1168{
877211f5 1169 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1170 int res;
1171
1172 snd_power_lock(card);
cbac4b0c 1173 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1174 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1175 snd_power_unlock(card);
1176 return res;
1177}
1178
1179#else
1180
877211f5 1181static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1182{
1183 return -ENOSYS;
1184}
1185
1186#endif /* CONFIG_PM */
1187
1188/*
1189 * xrun ioctl
1190 *
1191 * Change the RUNNING stream(s) to XRUN state.
1192 */
877211f5 1193static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1194{
877211f5
TI		 1195 struct snd_card *card = substream->pcm->card;
1196 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1197 int result;
1198
1199 snd_power_lock(card);
1200 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1201 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1202 if (result < 0)
1203 goto _unlock;
1204 }
1205
1206 snd_pcm_stream_lock_irq(substream);
1207 switch (runtime->status->state) {
1208 case SNDRV_PCM_STATE_XRUN:
1209 result = 0; /* already there */
1210 break;
1211 case SNDRV_PCM_STATE_RUNNING:
1212 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1213 break;
1214 default:
1215 result = -EBADFD;
1216 }
1217 snd_pcm_stream_unlock_irq(substream);
1218 _unlock:
1219 snd_power_unlock(card);
1220 return result;
1221}
1222
1223/*
1224 * reset ioctl
1225 */
877211f5 1226static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1227{
877211f5 1228 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1229 switch (runtime->status->state) {
1230 case SNDRV_PCM_STATE_RUNNING:
1231 case SNDRV_PCM_STATE_PREPARED:
1232 case SNDRV_PCM_STATE_PAUSED:
1233 case SNDRV_PCM_STATE_SUSPENDED:
1234 return 0;
1235 default:
1236 return -EBADFD;
1237 }
1238}
1239
877211f5 1240static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1241{
877211f5 1242 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1243 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1244 if (err < 0)
1245 return err;
1246 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1247 runtime->hw_ptr_base = 0;
877211f5
TI		 1248 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1249 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1250 runtime->silence_start = runtime->status->hw_ptr;
1251 runtime->silence_filled = 0;
1252 return 0;
1253}
1254
877211f5 1255static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1256{
877211f5 1257 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1258 runtime->control->appl_ptr = runtime->status->hw_ptr;
1259 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1260 runtime->silence_size > 0)
1261 snd_pcm_playback_silence(substream, ULONG_MAX);
1262}
1263
1264static struct action_ops snd_pcm_action_reset = {
1265 .pre_action = snd_pcm_pre_reset,
1266 .do_action = snd_pcm_do_reset,
1267 .post_action = snd_pcm_post_reset
1268};
1269
877211f5 1270static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1271{
1272 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1273}
1274
1275/*
1276 * prepare ioctl
1277 */
877211f5 1278static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1279{
877211f5 1280 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1281 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1282 return -EBADFD;
1283 if (snd_pcm_running(substream))
1284 return -EBUSY;
1285 return 0;
1286}
1287
877211f5 1288static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1289{
1290 int err;
1291 err = substream->ops->prepare(substream);
1292 if (err < 0)
1293 return err;
1294 return snd_pcm_do_reset(substream, 0);
1295}
1296
877211f5 1297static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1298{
877211f5 1299 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1300 runtime->control->appl_ptr = runtime->status->hw_ptr;
1301 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1302}
1303
1304static struct action_ops snd_pcm_action_prepare = {
1305 .pre_action = snd_pcm_pre_prepare,
1306 .do_action = snd_pcm_do_prepare,
1307 .post_action = snd_pcm_post_prepare
1308};
1309
1310/**
1311 * snd_pcm_prepare
df8db936
TI		 1312 * @substream: the PCM substream instance
1313 *
1314 * Prepare the PCM substream to be triggerable.
1da177e4 1315 */
bf1bbb5a 1316static int snd_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1317{
1318 int res;
877211f5 1319 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1320
1321 snd_power_lock(card);
cbac4b0c 1322 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1323 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0);
1324 snd_power_unlock(card);
1325 return res;
1326}
1327
1328/*
1329 * drain ioctl
1330 */
1331
877211f5 1332static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1333{
1334 if (substream->ffile->f_flags & O_NONBLOCK)
1335 return -EAGAIN;
1336 substream->runtime->trigger_master = substream;
1337 return 0;
1338}
1339
877211f5 1340static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1341{
877211f5 1342 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1343 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1344 switch (runtime->status->state) {
1345 case SNDRV_PCM_STATE_PREPARED:
1346 /* start playback stream if possible */
1347 if (! snd_pcm_playback_empty(substream)) {
1348 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1349 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1350 }
1351 break;
1352 case SNDRV_PCM_STATE_RUNNING:
1353 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1354 break;
1355 default:
1356 break;
1357 }
1358 } else {
1359 /* stop running stream */
1360 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1361 int state = snd_pcm_capture_avail(runtime) > 0 ?
1362 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1363 snd_pcm_do_stop(substream, state);
1364 snd_pcm_post_stop(substream, state);
1365 }
1366 }
1367 return 0;
1368}
1369
877211f5 1370static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1371{
1372}
1373
1374static struct action_ops snd_pcm_action_drain_init = {
1375 .pre_action = snd_pcm_pre_drain_init,
1376 .do_action = snd_pcm_do_drain_init,
1377 .post_action = snd_pcm_post_drain_init
1378};
1379
1380struct drain_rec {
877211f5 1381 struct snd_pcm_substream *substream;
1da177e4
LT		 1382 wait_queue_t wait;
1383 snd_pcm_uframes_t stop_threshold;
1384};
1385
877211f5 1386static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1387
1388/*
1389 * Drain the stream(s).
1390 * When the substream is linked, sync until the draining of all playback streams
1391 * is finished.
1392 * After this call, all streams are supposed to be either SETUP or DRAINING
1393 * (capture only) state.
1394 */
877211f5 1395static int snd_pcm_drain(struct snd_pcm_substream *substream)
1da177e4 1396{
877211f5
TI		 1397 struct snd_card *card;
1398 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1399 struct list_head *pos;
1400 int result = 0;
1401 int i, num_drecs;
1402 struct drain_rec *drec, drec_tmp, *d;
1403
1404 snd_assert(substream != NULL, return -ENXIO);
1405 card = substream->pcm->card;
1406 runtime = substream->runtime;
1407
1408 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1409 return -EBADFD;
1410
1da177e4
LT		 1411 snd_power_lock(card);
1412 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1413 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1414 if (result < 0) {
1415 snd_power_unlock(card);
1416 return result;
1417 }
1da177e4
LT		 1418 }
1419
1420 /* allocate temporary record for drain sync */
21cb2a2e 1421 down_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1422 if (snd_pcm_stream_linked(substream)) {
1423 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1424 if (! drec) {
21cb2a2e
TI		 1425 up_read(&snd_pcm_link_rwsem);
1426 snd_power_unlock(card);
1427 return -ENOMEM;
1da177e4
LT		 1428 }
1429 } else
1430 drec = &drec_tmp;
1431
21cb2a2e 1432 /* count only playback streams */
1da177e4
LT		 1433 num_drecs = 0;
1434 snd_pcm_group_for_each(pos, substream) {
877211f5 1435 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1da177e4 1436 runtime = s->runtime;
1da177e4
LT		 1437 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1438 d = &drec[num_drecs++];
1439 d->substream = s;
1440 init_waitqueue_entry(&d->wait, current);
1441 add_wait_queue(&runtime->sleep, &d->wait);
1442 /* stop_threshold fixup to avoid endless loop when
1443 * stop_threshold > buffer_size
1444 */
1445 d->stop_threshold = runtime->stop_threshold;
1446 if (runtime->stop_threshold > runtime->buffer_size)
1447 runtime->stop_threshold = runtime->buffer_size;
1448 }
1449 }
21cb2a2e 1450 up_read(&snd_pcm_link_rwsem);
1da177e4 1451 if (! num_drecs)
21cb2a2e
TI		 1452 goto _error;
1453
1454 snd_pcm_stream_lock_irq(substream);
1455 /* resume pause */
1456 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1457 snd_pcm_pause(substream, 0);
1458
1459 /* pre-start/stop - all running streams are changed to DRAINING state */
1460 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1461 if (result < 0) {
1462 snd_pcm_stream_unlock_irq(substream);
1463 goto _error;
1464 }
1da177e4
LT		 1465
1466 for (;;) {
1467 long tout;
1468 if (signal_pending(current)) {
1469 result = -ERESTARTSYS;
1470 break;
1471 }
21cb2a2e
TI		 1472 /* all finished? */
1473 for (i = 0; i < num_drecs; i++) {
1474 runtime = drec[i].substream->runtime;
1475 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1476 break;
1477 }
1478 if (i == num_drecs)
1479 break; /* yes, all drained */
1480
1da177e4
LT		 1481 set_current_state(TASK_INTERRUPTIBLE);
1482 snd_pcm_stream_unlock_irq(substream);
1483 snd_power_unlock(card);
1484 tout = schedule_timeout(10 * HZ);
1485 snd_power_lock(card);
1486 snd_pcm_stream_lock_irq(substream);
1487 if (tout == 0) {
1488 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1489 result = -ESTRPIPE;
1490 else {
1491 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1492 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1493 result = -EIO;
1494 }
1495 break;
1496 }
1da177e4 1497 }
21cb2a2e
TI		 1498
1499 snd_pcm_stream_unlock_irq(substream);
1500
1501 _error:
1da177e4
LT		 1502 for (i = 0; i < num_drecs; i++) {
1503 d = &drec[i];
1504 runtime = d->substream->runtime;
1505 remove_wait_queue(&runtime->sleep, &d->wait);
1506 runtime->stop_threshold = d->stop_threshold;
1507 }
1508
1da177e4
LT		 1509 if (drec != &drec_tmp)
1510 kfree(drec);
1da177e4 1511 snd_power_unlock(card);
1da177e4
LT		 1512
1513 return result;
1514}
1515
1516/*
1517 * drop ioctl
1518 *
1519 * Immediately put all linked substreams into SETUP state.
1520 */
877211f5 1521static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1522{
877211f5
TI		 1523 struct snd_pcm_runtime *runtime;
1524 struct snd_card *card;
1da177e4
LT		 1525 int result = 0;
1526
1527 snd_assert(substream != NULL, return -ENXIO);
1528 runtime = substream->runtime;
1529 card = substream->pcm->card;
1530
1531 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1532 return -EBADFD;
1533
1534 snd_power_lock(card);
1535 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1536 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1537 if (result < 0)
1538 goto _unlock;
1539 }
1540
1541 snd_pcm_stream_lock_irq(substream);
1542 /* resume pause */
1543 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1544 snd_pcm_pause(substream, 0);
1545
1546 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1547 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1548 snd_pcm_stream_unlock_irq(substream);
1549 _unlock:
1550 snd_power_unlock(card);
1551 return result;
1552}
1553
1554
1555/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1556static struct file *snd_pcm_file_fd(int fd)
1557{
1558 struct file *file;
1559 struct inode *inode;
f87135f5
CL		 1560 unsigned int minor;
1561
1da177e4
LT		 1562 file = fget(fd);
1563 if (!file)
1564 return NULL;
1565 inode = file->f_dentry->d_inode;
1566 if (!S_ISCHR(inode->i_mode) ||
1567 imajor(inode) != snd_major) {
1568 fput(file);
1569 return NULL;
1570 }
1571 minor = iminor(inode);
f87135f5
CL		 1572 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1573 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1574 fput(file);
1575 return NULL;
1576 }
1577 return file;
1578}
1579
1580/*
1581 * PCM link handling
1582 */
877211f5 1583static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1584{
1585 int res = 0;
1586 struct file *file;
877211f5
TI		 1587 struct snd_pcm_file *pcm_file;
1588 struct snd_pcm_substream *substream1;
1da177e4
LT		 1589
1590 file = snd_pcm_file_fd(fd);
1591 if (!file)
1592 return -EBADFD;
1593 pcm_file = file->private_data;
1594 substream1 = pcm_file->substream;
1595 down_write(&snd_pcm_link_rwsem);
1596 write_lock_irq(&snd_pcm_link_rwlock);
1597 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1598 substream->runtime->status->state != substream1->runtime->status->state) {
1599 res = -EBADFD;
1600 goto _end;
1601 }
1602 if (snd_pcm_stream_linked(substream1)) {
1603 res = -EALREADY;
1604 goto _end;
1605 }
1606 if (!snd_pcm_stream_linked(substream)) {
877211f5 1607 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1da177e4
LT		 1608 if (substream->group == NULL) {
1609 res = -ENOMEM;
1610 goto _end;
1611 }
1612 spin_lock_init(&substream->group->lock);
1613 INIT_LIST_HEAD(&substream->group->substreams);
1614 list_add_tail(&substream->link_list, &substream->group->substreams);
1615 substream->group->count = 1;
1616 }
1617 list_add_tail(&substream1->link_list, &substream->group->substreams);
1618 substream->group->count++;
1619 substream1->group = substream->group;
1620 _end:
1621 write_unlock_irq(&snd_pcm_link_rwlock);
1622 up_write(&snd_pcm_link_rwsem);
1623 fput(file);
1624 return res;
1625}
1626
877211f5 1627static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1628{
1629 substream->group = &substream->self_group;
1630 INIT_LIST_HEAD(&substream->self_group.substreams);
1631 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1632}
1633
877211f5 1634static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4
LT		 1635{
1636 struct list_head *pos;
1637 int res = 0;
1638
1639 down_write(&snd_pcm_link_rwsem);
1640 write_lock_irq(&snd_pcm_link_rwlock);
1641 if (!snd_pcm_stream_linked(substream)) {
1642 res = -EALREADY;
1643 goto _end;
1644 }
1645 list_del(&substream->link_list);
1646 substream->group->count--;
1647 if (substream->group->count == 1) { /* detach the last stream, too */
1648 snd_pcm_group_for_each(pos, substream) {
1649 relink_to_local(snd_pcm_group_substream_entry(pos));
1650 break;
1651 }
1652 kfree(substream->group);
1653 }
1654 relink_to_local(substream);
1655 _end:
1656 write_unlock_irq(&snd_pcm_link_rwlock);
1657 up_write(&snd_pcm_link_rwsem);
1658 return res;
1659}
1660
1661/*
1662 * hw configurator
1663 */
877211f5
TI		 1664static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1665 struct snd_pcm_hw_rule *rule)
1da177e4 1666{
877211f5 1667 struct snd_interval t;
1da177e4
LT		 1668 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1669 hw_param_interval_c(params, rule->deps[1]), &t);
1670 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1671}
1672
877211f5
TI		 1673static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1674 struct snd_pcm_hw_rule *rule)
1da177e4 1675{
877211f5 1676 struct snd_interval t;
1da177e4
LT		 1677 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1678 hw_param_interval_c(params, rule->deps[1]), &t);
1679 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1680}
1681
877211f5
TI		 1682static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1683 struct snd_pcm_hw_rule *rule)
1da177e4 1684{
877211f5 1685 struct snd_interval t;
1da177e4
LT		 1686 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1687 hw_param_interval_c(params, rule->deps[1]),
1688 (unsigned long) rule->private, &t);
1689 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1690}
1691
877211f5
TI		 1692static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1693 struct snd_pcm_hw_rule *rule)
1da177e4 1694{
877211f5 1695 struct snd_interval t;
1da177e4
LT		 1696 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1697 (unsigned long) rule->private,
1698 hw_param_interval_c(params, rule->deps[1]), &t);
1699 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1700}
1701
877211f5
TI		 1702static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1703 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1704{
1705 unsigned int k;
877211f5
TI		 1706 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1707 struct snd_mask m;
1708 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1709 snd_mask_any(&m);
1710 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1711 int bits;
1712 if (! snd_mask_test(mask, k))
1713 continue;
1714 bits = snd_pcm_format_physical_width(k);
1715 if (bits <= 0)
1716 continue; /* ignore invalid formats */
1717 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1718 snd_mask_reset(&m, k);
1719 }
1720 return snd_mask_refine(mask, &m);
1721}
1722
877211f5
TI		 1723static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1724 struct snd_pcm_hw_rule *rule)
1da177e4 1725{
877211f5 1726 struct snd_interval t;
1da177e4
LT		 1727 unsigned int k;
1728 t.min = UINT_MAX;
1729 t.max = 0;
1730 t.openmin = 0;
1731 t.openmax = 0;
1732 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1733 int bits;
1734 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1735 continue;
1736 bits = snd_pcm_format_physical_width(k);
1737 if (bits <= 0)
1738 continue; /* ignore invalid formats */
1739 if (t.min > (unsigned)bits)
1740 t.min = bits;
1741 if (t.max < (unsigned)bits)
1742 t.max = bits;
1743 }
1744 t.integer = 1;
1745 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1746}
1747
1748#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1749#error "Change this table"
1750#endif
1751
1752static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1753 48000, 64000, 88200, 96000, 176400, 192000 };
1754
877211f5
TI		 1755static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1756 struct snd_pcm_hw_rule *rule)
1da177e4 1757{
877211f5 1758 struct snd_pcm_hardware *hw = rule->private;
1da177e4
LT		 1759 return snd_interval_list(hw_param_interval(params, rule->var),
1760 ARRAY_SIZE(rates), rates, hw->rates);
1761}
1762
877211f5
TI		 1763static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1764 struct snd_pcm_hw_rule *rule)
1da177e4 1765{
877211f5
TI		 1766 struct snd_interval t;
1767 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1768 t.min = 0;
1769 t.max = substream->buffer_bytes_max;
1770 t.openmin = 0;
1771 t.openmax = 0;
1772 t.integer = 1;
1773 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1774}
1775
877211f5 1776int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1777{
877211f5
TI		 1778 struct snd_pcm_runtime *runtime = substream->runtime;
1779 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1780 int k, err;
1781
1782 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1783 snd_mask_any(constrs_mask(constrs, k));
1784 }
1785
1786 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1787 snd_interval_any(constrs_interval(constrs, k));
1788 }
1789
1790 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1791 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1792 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1793 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1794 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1795
1796 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1797 snd_pcm_hw_rule_format, NULL,
1798 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1799 if (err < 0)
1800 return err;
1801 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1802 snd_pcm_hw_rule_sample_bits, NULL,
1803 SNDRV_PCM_HW_PARAM_FORMAT,
1804 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1805 if (err < 0)
1806 return err;
1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1808 snd_pcm_hw_rule_div, NULL,
1809 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1810 if (err < 0)
1811 return err;
1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1813 snd_pcm_hw_rule_mul, NULL,
1814 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1815 if (err < 0)
1816 return err;
1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1818 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1819 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1820 if (err < 0)
1821 return err;
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1823 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1824 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1825 if (err < 0)
1826 return err;
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1828 snd_pcm_hw_rule_div, NULL,
1829 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1830 if (err < 0)
1831 return err;
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1833 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1834 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1835 if (err < 0)
1836 return err;
1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1838 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1839 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1840 if (err < 0)
1841 return err;
1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1843 snd_pcm_hw_rule_div, NULL,
1844 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1845 if (err < 0)
1846 return err;
1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1848 snd_pcm_hw_rule_div, NULL,
1849 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1850 if (err < 0)
1851 return err;
1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1853 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1854 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1855 if (err < 0)
1856 return err;
1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1858 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1859 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1860 if (err < 0)
1861 return err;
1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1863 snd_pcm_hw_rule_mul, NULL,
1864 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1865 if (err < 0)
1866 return err;
1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1868 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1869 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1870 if (err < 0)
1871 return err;
1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1873 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1874 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1875 if (err < 0)
1876 return err;
1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1878 snd_pcm_hw_rule_muldivk, (void*) 8,
1879 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1880 if (err < 0)
1881 return err;
1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1883 snd_pcm_hw_rule_muldivk, (void*) 8,
1884 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1885 if (err < 0)
1886 return err;
1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1888 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1889 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1890 if (err < 0)
1891 return err;
1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1893 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1894 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1895 if (err < 0)
1896 return err;
1897 return 0;
1898}
1899
877211f5 1900int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1901{
877211f5
TI		 1902 struct snd_pcm_runtime *runtime = substream->runtime;
1903 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1904 int err;
1905 unsigned int mask = 0;
1906
1907 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1908 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1909 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1910 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1911 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1912 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1913 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1914 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1915 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1916 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1917 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1918 }
1919 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1920 snd_assert(err >= 0, return -EINVAL);
1921
1922 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1923 snd_assert(err >= 0, return -EINVAL);
1924
1925 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1926 snd_assert(err >= 0, return -EINVAL);
1927
1928 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1929 hw->channels_min, hw->channels_max);
1930 snd_assert(err >= 0, return -EINVAL);
1931
1932 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1933 hw->rate_min, hw->rate_max);
1934 snd_assert(err >= 0, return -EINVAL);
1935
1936 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1937 hw->period_bytes_min, hw->period_bytes_max);
1938 snd_assert(err >= 0, return -EINVAL);
1939
1940 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1941 hw->periods_min, hw->periods_max);
1942 snd_assert(err >= 0, return -EINVAL);
1943
1944 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1945 hw->period_bytes_min, hw->buffer_bytes_max);
1946 snd_assert(err >= 0, return -EINVAL);
1947
1948 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1949 snd_pcm_hw_rule_buffer_bytes_max, substream,
1950 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1951 if (err < 0)
1952 return err;
1953
1954 /* FIXME: remove */
1955 if (runtime->dma_bytes) {
1956 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1957 snd_assert(err >= 0, return -EINVAL);
1958 }
1959
1960 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1961 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1962 snd_pcm_hw_rule_rate, hw,
1963 SNDRV_PCM_HW_PARAM_RATE, -1);
1964 if (err < 0)
1965 return err;
1966 }
1967
1968 /* FIXME: this belong to lowlevel */
1969 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1970 1000000 / HZ, 1000000 / HZ);
1971 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1972
1973 return 0;
1974}
1975
877211f5
TI		 1976static void snd_pcm_add_file(struct snd_pcm_str *str,
1977 struct snd_pcm_file *pcm_file)
1da177e4
LT		 1978{
1979 pcm_file->next = str->files;
1980 str->files = pcm_file;
1981}
1982
877211f5
TI		 1983static void snd_pcm_remove_file(struct snd_pcm_str *str,
1984 struct snd_pcm_file *pcm_file)
1da177e4 1985{
877211f5 1986 struct snd_pcm_file * pcm_file1;
1da177e4
LT		 1987 if (str->files == pcm_file) {
1988 str->files = pcm_file->next;
1989 } else {
1990 pcm_file1 = str->files;
1991 while (pcm_file1 && pcm_file1->next != pcm_file)
1992 pcm_file1 = pcm_file1->next;
1993 if (pcm_file1 != NULL)
1994 pcm_file1->next = pcm_file->next;
1995 }
1996}
1997
3bf75f9b 1998static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 1999{
3bf75f9b 2000 struct snd_pcm_file *pcm_file = substream->file;
1da177e4 2001
1da177e4 2002 snd_pcm_unlink(substream);
3bf75f9b
TI		 2003 snd_pcm_remove_file(substream->pstr, pcm_file);
2004 kfree(pcm_file);
2005}
2006
2007void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2008{
2009 snd_pcm_drop(substream);
2010 if (substream->pcm_release)
2011 substream->pcm_release(substream);
2012 if (substream->hw_opened) {
1da177e4
LT		 2013 if (substream->ops->hw_free != NULL)
2014 substream->ops->hw_free(substream);
2015 substream->ops->close(substream);
3bf75f9b 2016 substream->hw_opened = 0;
1da177e4 2017 }
3bf75f9b
TI		 2018 snd_pcm_detach_substream(substream);
2019}
2020
2021int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2022 struct file *file,
2023 struct snd_pcm_substream **rsubstream)
2024{
2025 struct snd_pcm_substream *substream;
2026 int err;
2027
2028 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2029 if (err < 0)
2030 return err;
2031 substream->no_mmap_ctrl = 0;
2032 err = snd_pcm_hw_constraints_init(substream);
2033 if (err < 0) {
2034 snd_printd("snd_pcm_hw_constraints_init failed\n");
2035 goto error;
2036 }
2037
2038 if ((err = substream->ops->open(substream)) < 0)
2039 goto error;
2040
2041 substream->hw_opened = 1;
2042
2043 err = snd_pcm_hw_constraints_complete(substream);
2044 if (err < 0) {
2045 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2046 goto error;
2047 }
2048
2049 *rsubstream = substream;
1da177e4 2050 return 0;
3bf75f9b
TI		 2051
2052 error:
2053 snd_pcm_release_substream(substream);
2054 return err;
1da177e4
LT		 2055}
2056
2057static int snd_pcm_open_file(struct file *file,
877211f5 2058 struct snd_pcm *pcm,
1da177e4 2059 int stream,
877211f5 2060 struct snd_pcm_file **rpcm_file)
1da177e4 2061{
877211f5
TI		 2062 struct snd_pcm_file *pcm_file;
2063 struct snd_pcm_substream *substream;
2064 struct snd_pcm_str *str;
3bf75f9b 2065 int err;
1da177e4
LT		 2066
2067 snd_assert(rpcm_file != NULL, return -EINVAL);
2068 *rpcm_file = NULL;
2069
3bf75f9b
TI		 2070 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2071 if (err < 0)
2072 return err;
2073
ca2c0966 2074 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
1da177e4 2075 if (pcm_file == NULL) {
3bf75f9b 2076 snd_pcm_release_substream(substream);
1da177e4
LT		 2077 return -ENOMEM;
2078 }
1da177e4
LT		 2079 str = substream->pstr;
2080 substream->file = pcm_file;
3bf75f9b 2081 substream->pcm_release = pcm_release_private;
1da177e4 2082 pcm_file->substream = substream;
1da177e4
LT		 2083 snd_pcm_add_file(str, pcm_file);
2084
1da177e4
LT		 2085 file->private_data = pcm_file;
2086 *rpcm_file = pcm_file;
2087 return 0;
2088}
2089
f87135f5
CL		 2090static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2091{
2092 struct snd_pcm *pcm;
2093
2094 pcm = snd_lookup_minor_data(iminor(inode),
2095 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2096 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2097}
2098
2099static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2100{
877211f5 2101 struct snd_pcm *pcm;
f87135f5
CL		 2102
2103 pcm = snd_lookup_minor_data(iminor(inode),
2104 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2105 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2106}
2107
2108static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2109{
2110 int err;
877211f5 2111 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2112 wait_queue_t wait;
2113
1da177e4
LT		 2114 if (pcm == NULL) {
2115 err = -ENODEV;
2116 goto __error1;
2117 }
2118 err = snd_card_file_add(pcm->card, file);
2119 if (err < 0)
2120 goto __error1;
2121 if (!try_module_get(pcm->card->module)) {
2122 err = -EFAULT;
2123 goto __error2;
2124 }
2125 init_waitqueue_entry(&wait, current);
2126 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2127 mutex_lock(&pcm->open_mutex);
1da177e4 2128 while (1) {
f87135f5 2129 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
1da177e4
LT		 2130 if (err >= 0)
2131 break;
2132 if (err == -EAGAIN) {
2133 if (file->f_flags & O_NONBLOCK) {
2134 err = -EBUSY;
2135 break;
2136 }
2137 } else
2138 break;
2139 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2140 mutex_unlock(&pcm->open_mutex);
1da177e4 2141 schedule();
1a60d4c5 2142 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2143 if (signal_pending(current)) {
2144 err = -ERESTARTSYS;
2145 break;
2146 }
2147 }
2148 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2149 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2150 if (err < 0)
2151 goto __error;
2152 return err;
2153
2154 __error:
2155 module_put(pcm->card->module);
2156 __error2:
2157 snd_card_file_remove(pcm->card, file);
2158 __error1:
2159 return err;
2160}
2161
2162static int snd_pcm_release(struct inode *inode, struct file *file)
2163{
877211f5
TI		 2164 struct snd_pcm *pcm;
2165 struct snd_pcm_substream *substream;
2166 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2167
2168 pcm_file = file->private_data;
2169 substream = pcm_file->substream;
2170 snd_assert(substream != NULL, return -ENXIO);
2171 snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2172 pcm = substream->pcm;
1da177e4 2173 fasync_helper(-1, file, 0, &substream->runtime->fasync);
1a60d4c5 2174 mutex_lock(&pcm->open_mutex);
3bf75f9b 2175 snd_pcm_release_substream(substream);
1a60d4c5 2176 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2177 wake_up(&pcm->open_wait);
2178 module_put(pcm->card->module);
2179 snd_card_file_remove(pcm->card, file);
2180 return 0;
2181}
2182
877211f5
TI		 2183static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2184 snd_pcm_uframes_t frames)
1da177e4 2185{
877211f5 2186 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2187 snd_pcm_sframes_t appl_ptr;
2188 snd_pcm_sframes_t ret;
2189 snd_pcm_sframes_t hw_avail;
2190
2191 if (frames == 0)
2192 return 0;
2193
2194 snd_pcm_stream_lock_irq(substream);
2195 switch (runtime->status->state) {
2196 case SNDRV_PCM_STATE_PREPARED:
2197 break;
2198 case SNDRV_PCM_STATE_DRAINING:
2199 case SNDRV_PCM_STATE_RUNNING:
2200 if (snd_pcm_update_hw_ptr(substream) >= 0)
2201 break;
2202 /* Fall through */
2203 case SNDRV_PCM_STATE_XRUN:
2204 ret = -EPIPE;
2205 goto __end;
2206 default:
2207 ret = -EBADFD;
2208 goto __end;
2209 }
2210
2211 hw_avail = snd_pcm_playback_hw_avail(runtime);
2212 if (hw_avail <= 0) {
2213 ret = 0;
2214 goto __end;
2215 }
2216 if (frames > (snd_pcm_uframes_t)hw_avail)
2217 frames = hw_avail;
2218 else
2219 frames -= frames % runtime->xfer_align;
2220 appl_ptr = runtime->control->appl_ptr - frames;
2221 if (appl_ptr < 0)
2222 appl_ptr += runtime->boundary;
2223 runtime->control->appl_ptr = appl_ptr;
2224 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2225 runtime->sleep_min)
2226 snd_pcm_tick_prepare(substream);
2227 ret = frames;
2228 __end:
2229 snd_pcm_stream_unlock_irq(substream);
2230 return ret;
2231}
2232
877211f5
TI		 2233static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2234 snd_pcm_uframes_t frames)
1da177e4 2235{
877211f5 2236 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2237 snd_pcm_sframes_t appl_ptr;
2238 snd_pcm_sframes_t ret;
2239 snd_pcm_sframes_t hw_avail;
2240
2241 if (frames == 0)
2242 return 0;
2243
2244 snd_pcm_stream_lock_irq(substream);
2245 switch (runtime->status->state) {
2246 case SNDRV_PCM_STATE_PREPARED:
2247 case SNDRV_PCM_STATE_DRAINING:
2248 break;
2249 case SNDRV_PCM_STATE_RUNNING:
2250 if (snd_pcm_update_hw_ptr(substream) >= 0)
2251 break;
2252 /* Fall through */
2253 case SNDRV_PCM_STATE_XRUN:
2254 ret = -EPIPE;
2255 goto __end;
2256 default:
2257 ret = -EBADFD;
2258 goto __end;
2259 }
2260
2261 hw_avail = snd_pcm_capture_hw_avail(runtime);
2262 if (hw_avail <= 0) {
2263 ret = 0;
2264 goto __end;
2265 }
2266 if (frames > (snd_pcm_uframes_t)hw_avail)
2267 frames = hw_avail;
2268 else
2269 frames -= frames % runtime->xfer_align;
2270 appl_ptr = runtime->control->appl_ptr - frames;
2271 if (appl_ptr < 0)
2272 appl_ptr += runtime->boundary;
2273 runtime->control->appl_ptr = appl_ptr;
2274 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2275 runtime->sleep_min)
2276 snd_pcm_tick_prepare(substream);
2277 ret = frames;
2278 __end:
2279 snd_pcm_stream_unlock_irq(substream);
2280 return ret;
2281}
2282
877211f5
TI		 2283static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2284 snd_pcm_uframes_t frames)
1da177e4 2285{
877211f5 2286 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2287 snd_pcm_sframes_t appl_ptr;
2288 snd_pcm_sframes_t ret;
2289 snd_pcm_sframes_t avail;
2290
2291 if (frames == 0)
2292 return 0;
2293
2294 snd_pcm_stream_lock_irq(substream);
2295 switch (runtime->status->state) {
2296 case SNDRV_PCM_STATE_PREPARED:
2297 case SNDRV_PCM_STATE_PAUSED:
2298 break;
2299 case SNDRV_PCM_STATE_DRAINING:
2300 case SNDRV_PCM_STATE_RUNNING:
2301 if (snd_pcm_update_hw_ptr(substream) >= 0)
2302 break;
2303 /* Fall through */
2304 case SNDRV_PCM_STATE_XRUN:
2305 ret = -EPIPE;
2306 goto __end;
2307 default:
2308 ret = -EBADFD;
2309 goto __end;
2310 }
2311
2312 avail = snd_pcm_playback_avail(runtime);
2313 if (avail <= 0) {
2314 ret = 0;
2315 goto __end;
2316 }
2317 if (frames > (snd_pcm_uframes_t)avail)
2318 frames = avail;
2319 else
2320 frames -= frames % runtime->xfer_align;
2321 appl_ptr = runtime->control->appl_ptr + frames;
2322 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2323 appl_ptr -= runtime->boundary;
2324 runtime->control->appl_ptr = appl_ptr;
2325 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2326 runtime->sleep_min)
2327 snd_pcm_tick_prepare(substream);
2328 ret = frames;
2329 __end:
2330 snd_pcm_stream_unlock_irq(substream);
2331 return ret;
2332}
2333
877211f5
TI		 2334static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2335 snd_pcm_uframes_t frames)
1da177e4 2336{
877211f5 2337 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2338 snd_pcm_sframes_t appl_ptr;
2339 snd_pcm_sframes_t ret;
2340 snd_pcm_sframes_t avail;
2341
2342 if (frames == 0)
2343 return 0;
2344
2345 snd_pcm_stream_lock_irq(substream);
2346 switch (runtime->status->state) {
2347 case SNDRV_PCM_STATE_PREPARED:
2348 case SNDRV_PCM_STATE_DRAINING:
2349 case SNDRV_PCM_STATE_PAUSED:
2350 break;
2351 case SNDRV_PCM_STATE_RUNNING:
2352 if (snd_pcm_update_hw_ptr(substream) >= 0)
2353 break;
2354 /* Fall through */
2355 case SNDRV_PCM_STATE_XRUN:
2356 ret = -EPIPE;
2357 goto __end;
2358 default:
2359 ret = -EBADFD;
2360 goto __end;
2361 }
2362
2363 avail = snd_pcm_capture_avail(runtime);
2364 if (avail <= 0) {
2365 ret = 0;
2366 goto __end;
2367 }
2368 if (frames > (snd_pcm_uframes_t)avail)
2369 frames = avail;
2370 else
2371 frames -= frames % runtime->xfer_align;
2372 appl_ptr = runtime->control->appl_ptr + frames;
2373 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2374 appl_ptr -= runtime->boundary;
2375 runtime->control->appl_ptr = appl_ptr;
2376 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2377 runtime->sleep_min)
2378 snd_pcm_tick_prepare(substream);
2379 ret = frames;
2380 __end:
2381 snd_pcm_stream_unlock_irq(substream);
2382 return ret;
2383}
2384
877211f5 2385static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2386{
877211f5 2387 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2388 int err;
2389
2390 snd_pcm_stream_lock_irq(substream);
2391 switch (runtime->status->state) {
2392 case SNDRV_PCM_STATE_DRAINING:
2393 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2394 goto __badfd;
2395 case SNDRV_PCM_STATE_RUNNING:
2396 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2397 break;
2398 /* Fall through */
2399 case SNDRV_PCM_STATE_PREPARED:
2400 case SNDRV_PCM_STATE_SUSPENDED:
2401 err = 0;
2402 break;
2403 case SNDRV_PCM_STATE_XRUN:
2404 err = -EPIPE;
2405 break;
2406 default:
2407 __badfd:
2408 err = -EBADFD;
2409 break;
2410 }
2411 snd_pcm_stream_unlock_irq(substream);
2412 return err;
2413}
2414
877211f5
TI		 2415static int snd_pcm_delay(struct snd_pcm_substream *substream,
2416 snd_pcm_sframes_t __user *res)
1da177e4 2417{
877211f5 2418 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2419 int err;
2420 snd_pcm_sframes_t n = 0;
2421
2422 snd_pcm_stream_lock_irq(substream);
2423 switch (runtime->status->state) {
2424 case SNDRV_PCM_STATE_DRAINING:
2425 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2426 goto __badfd;
2427 case SNDRV_PCM_STATE_RUNNING:
2428 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2429 break;
2430 /* Fall through */
2431 case SNDRV_PCM_STATE_PREPARED:
2432 case SNDRV_PCM_STATE_SUSPENDED:
2433 err = 0;
2434 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2435 n = snd_pcm_playback_hw_avail(runtime);
2436 else
2437 n = snd_pcm_capture_avail(runtime);
2438 break;
2439 case SNDRV_PCM_STATE_XRUN:
2440 err = -EPIPE;
2441 break;
2442 default:
2443 __badfd:
2444 err = -EBADFD;
2445 break;
2446 }
2447 snd_pcm_stream_unlock_irq(substream);
2448 if (!err)
2449 if (put_user(n, res))
2450 err = -EFAULT;
2451 return err;
2452}
2453
877211f5
TI		 2454static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2455 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2456{
877211f5
TI		 2457 struct snd_pcm_runtime *runtime = substream->runtime;
2458 struct snd_pcm_sync_ptr sync_ptr;
2459 volatile struct snd_pcm_mmap_status *status;
2460 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2461 int err;
2462
2463 memset(&sync_ptr, 0, sizeof(sync_ptr));
2464 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2465 return -EFAULT;
877211f5 2466 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2467 return -EFAULT;
2468 status = runtime->status;
2469 control = runtime->control;
2470 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2471 err = snd_pcm_hwsync(substream);
2472 if (err < 0)
2473 return err;
2474 }
2475 snd_pcm_stream_lock_irq(substream);
2476 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2477 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2478 else
2479 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2480 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2481 control->avail_min = sync_ptr.c.control.avail_min;
2482 else
2483 sync_ptr.c.control.avail_min = control->avail_min;
2484 sync_ptr.s.status.state = status->state;
2485 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2486 sync_ptr.s.status.tstamp = status->tstamp;
2487 sync_ptr.s.status.suspended_state = status->suspended_state;
2488 snd_pcm_stream_unlock_irq(substream);
2489 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2490 return -EFAULT;
2491 return 0;
2492}
2493
877211f5 2494static int snd_pcm_common_ioctl1(struct snd_pcm_substream *substream,
1da177e4
LT		 2495 unsigned int cmd, void __user *arg)
2496{
2497 snd_assert(substream != NULL, return -ENXIO);
2498
2499 switch (cmd) {
2500 case SNDRV_PCM_IOCTL_PVERSION:
2501 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2502 case SNDRV_PCM_IOCTL_INFO:
2503 return snd_pcm_info_user(substream, arg);
07799e75 2504 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
1da177e4 2505 return 0;
1da177e4
LT		 2506 case SNDRV_PCM_IOCTL_HW_REFINE:
2507 return snd_pcm_hw_refine_user(substream, arg);
2508 case SNDRV_PCM_IOCTL_HW_PARAMS:
2509 return snd_pcm_hw_params_user(substream, arg);
2510 case SNDRV_PCM_IOCTL_HW_FREE:
2511 return snd_pcm_hw_free(substream);
2512 case SNDRV_PCM_IOCTL_SW_PARAMS:
2513 return snd_pcm_sw_params_user(substream, arg);
2514 case SNDRV_PCM_IOCTL_STATUS:
2515 return snd_pcm_status_user(substream, arg);
2516 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2517 return snd_pcm_channel_info_user(substream, arg);
2518 case SNDRV_PCM_IOCTL_PREPARE:
2519 return snd_pcm_prepare(substream);
2520 case SNDRV_PCM_IOCTL_RESET:
2521 return snd_pcm_reset(substream);
2522 case SNDRV_PCM_IOCTL_START:
2523 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2524 case SNDRV_PCM_IOCTL_LINK:
2525 return snd_pcm_link(substream, (int)(unsigned long) arg);
2526 case SNDRV_PCM_IOCTL_UNLINK:
2527 return snd_pcm_unlink(substream);
2528 case SNDRV_PCM_IOCTL_RESUME:
2529 return snd_pcm_resume(substream);
2530 case SNDRV_PCM_IOCTL_XRUN:
2531 return snd_pcm_xrun(substream);
2532 case SNDRV_PCM_IOCTL_HWSYNC:
2533 return snd_pcm_hwsync(substream);
2534 case SNDRV_PCM_IOCTL_DELAY:
2535 return snd_pcm_delay(substream, arg);
2536 case SNDRV_PCM_IOCTL_SYNC_PTR:
2537 return snd_pcm_sync_ptr(substream, arg);
59d48582 2538#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2539 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2540 return snd_pcm_hw_refine_old_user(substream, arg);
2541 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2542 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2543#endif
1da177e4
LT		 2544 case SNDRV_PCM_IOCTL_DRAIN:
2545 return snd_pcm_drain(substream);
2546 case SNDRV_PCM_IOCTL_DROP:
2547 return snd_pcm_drop(substream);
e661d0dd
TI		 2548 case SNDRV_PCM_IOCTL_PAUSE:
2549 {
2550 int res;
2551 snd_pcm_stream_lock_irq(substream);
2552 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2553 snd_pcm_stream_unlock_irq(substream);
2554 return res;
2555 }
1da177e4
LT		 2556 }
2557 snd_printd("unknown ioctl = 0x%x\n", cmd);
2558 return -ENOTTY;
2559}
2560
877211f5 2561static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream,
1da177e4
LT		 2562 unsigned int cmd, void __user *arg)
2563{
2564 snd_assert(substream != NULL, return -ENXIO);
2565 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2566 switch (cmd) {
2567 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2568 {
877211f5
TI		 2569 struct snd_xferi xferi;
2570 struct snd_xferi __user *_xferi = arg;
2571 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2572 snd_pcm_sframes_t result;
2573 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2574 return -EBADFD;
2575 if (put_user(0, &_xferi->result))
2576 return -EFAULT;
2577 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2578 return -EFAULT;
2579 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2580 __put_user(result, &_xferi->result);
2581 return result < 0 ? result : 0;
2582 }
2583 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2584 {
877211f5
TI		 2585 struct snd_xfern xfern;
2586 struct snd_xfern __user *_xfern = arg;
2587 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2588 void __user **bufs;
2589 snd_pcm_sframes_t result;
2590 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2591 return -EBADFD;
2592 if (runtime->channels > 128)
2593 return -EINVAL;
2594 if (put_user(0, &_xfern->result))
2595 return -EFAULT;
2596 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2597 return -EFAULT;
2598 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2599 if (bufs == NULL)
2600 return -ENOMEM;
2601 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2602 kfree(bufs);
2603 return -EFAULT;
2604 }
2605 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2606 kfree(bufs);
2607 __put_user(result, &_xfern->result);
2608 return result < 0 ? result : 0;
2609 }
2610 case SNDRV_PCM_IOCTL_REWIND:
2611 {
2612 snd_pcm_uframes_t frames;
2613 snd_pcm_uframes_t __user *_frames = arg;
2614 snd_pcm_sframes_t result;
2615 if (get_user(frames, _frames))
2616 return -EFAULT;
2617 if (put_user(0, _frames))
2618 return -EFAULT;
2619 result = snd_pcm_playback_rewind(substream, frames);
2620 __put_user(result, _frames);
2621 return result < 0 ? result : 0;
2622 }
2623 case SNDRV_PCM_IOCTL_FORWARD:
2624 {
2625 snd_pcm_uframes_t frames;
2626 snd_pcm_uframes_t __user *_frames = arg;
2627 snd_pcm_sframes_t result;
2628 if (get_user(frames, _frames))
2629 return -EFAULT;
2630 if (put_user(0, _frames))
2631 return -EFAULT;
2632 result = snd_pcm_playback_forward(substream, frames);
2633 __put_user(result, _frames);
2634 return result < 0 ? result : 0;
2635 }
1da177e4
LT		 2636 }
2637 return snd_pcm_common_ioctl1(substream, cmd, arg);
2638}
2639
877211f5 2640static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream,
1da177e4
LT		 2641 unsigned int cmd, void __user *arg)
2642{
2643 snd_assert(substream != NULL, return -ENXIO);
2644 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2645 switch (cmd) {
2646 case SNDRV_PCM_IOCTL_READI_FRAMES:
2647 {
877211f5
TI		 2648 struct snd_xferi xferi;
2649 struct snd_xferi __user *_xferi = arg;
2650 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2651 snd_pcm_sframes_t result;
2652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2653 return -EBADFD;
2654 if (put_user(0, &_xferi->result))
2655 return -EFAULT;
2656 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2657 return -EFAULT;
2658 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2659 __put_user(result, &_xferi->result);
2660 return result < 0 ? result : 0;
2661 }
2662 case SNDRV_PCM_IOCTL_READN_FRAMES:
2663 {
877211f5
TI		 2664 struct snd_xfern xfern;
2665 struct snd_xfern __user *_xfern = arg;
2666 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2667 void *bufs;
2668 snd_pcm_sframes_t result;
2669 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2670 return -EBADFD;
2671 if (runtime->channels > 128)
2672 return -EINVAL;
2673 if (put_user(0, &_xfern->result))
2674 return -EFAULT;
2675 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2676 return -EFAULT;
2677 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2678 if (bufs == NULL)
2679 return -ENOMEM;
2680 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2681 kfree(bufs);
2682 return -EFAULT;
2683 }
2684 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2685 kfree(bufs);
2686 __put_user(result, &_xfern->result);
2687 return result < 0 ? result : 0;
2688 }
2689 case SNDRV_PCM_IOCTL_REWIND:
2690 {
2691 snd_pcm_uframes_t frames;
2692 snd_pcm_uframes_t __user *_frames = arg;
2693 snd_pcm_sframes_t result;
2694 if (get_user(frames, _frames))
2695 return -EFAULT;
2696 if (put_user(0, _frames))
2697 return -EFAULT;
2698 result = snd_pcm_capture_rewind(substream, frames);
2699 __put_user(result, _frames);
2700 return result < 0 ? result : 0;
2701 }
2702 case SNDRV_PCM_IOCTL_FORWARD:
2703 {
2704 snd_pcm_uframes_t frames;
2705 snd_pcm_uframes_t __user *_frames = arg;
2706 snd_pcm_sframes_t result;
2707 if (get_user(frames, _frames))
2708 return -EFAULT;
2709 if (put_user(0, _frames))
2710 return -EFAULT;
2711 result = snd_pcm_capture_forward(substream, frames);
2712 __put_user(result, _frames);
2713 return result < 0 ? result : 0;
2714 }
2715 }
2716 return snd_pcm_common_ioctl1(substream, cmd, arg);
2717}
2718
877211f5
TI		 2719static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2720 unsigned long arg)
1da177e4 2721{
877211f5 2722 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2723
2724 pcm_file = file->private_data;
2725
2726 if (((cmd >> 8) & 0xff) != 'A')
2727 return -ENOTTY;
2728
2729 return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2730}
2731
877211f5
TI		 2732static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2733 unsigned long arg)
1da177e4 2734{
877211f5 2735 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2736
2737 pcm_file = file->private_data;
2738
2739 if (((cmd >> 8) & 0xff) != 'A')
2740 return -ENOTTY;
2741
2742 return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2743}
2744
bf1bbb5a
TI		 2745int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2746 unsigned int cmd, void *arg)
1da177e4
LT		 2747{
2748 mm_segment_t fs;
2749 int result;
2750
2751 fs = snd_enter_user();
1da177e4
LT		 2752 switch (substream->stream) {
2753 case SNDRV_PCM_STREAM_PLAYBACK:
bf1bbb5a
TI		 2754 result = snd_pcm_playback_ioctl1(substream,
2755 cmd, (void __user *)arg);
2756 break;
1da177e4 2757 case SNDRV_PCM_STREAM_CAPTURE:
bf1bbb5a
TI		 2758 result = snd_pcm_capture_ioctl1(substream,
2759 cmd, (void __user *)arg);
2760 break;
1da177e4 2761 default:
bf1bbb5a
TI		 2762 result = -EINVAL;
2763 break;
1da177e4 2764 }
bf1bbb5a
TI		 2765 snd_leave_user(fs);
2766 return result;
1da177e4
LT		 2767}
2768
877211f5
TI		 2769static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2770 loff_t * offset)
1da177e4 2771{
877211f5
TI		 2772 struct snd_pcm_file *pcm_file;
2773 struct snd_pcm_substream *substream;
2774 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2775 snd_pcm_sframes_t result;
2776
2777 pcm_file = file->private_data;
2778 substream = pcm_file->substream;
2779 snd_assert(substream != NULL, return -ENXIO);
2780 runtime = substream->runtime;
2781 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2782 return -EBADFD;
2783 if (!frame_aligned(runtime, count))
2784 return -EINVAL;
2785 count = bytes_to_frames(runtime, count);
2786 result = snd_pcm_lib_read(substream, buf, count);
2787 if (result > 0)
2788 result = frames_to_bytes(runtime, result);
2789 return result;
2790}
2791
877211f5
TI		 2792static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2793 size_t count, loff_t * offset)
1da177e4 2794{
877211f5
TI		 2795 struct snd_pcm_file *pcm_file;
2796 struct snd_pcm_substream *substream;
2797 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2798 snd_pcm_sframes_t result;
2799
2800 pcm_file = file->private_data;
2801 substream = pcm_file->substream;
2802 snd_assert(substream != NULL, result = -ENXIO; goto end);
2803 runtime = substream->runtime;
2804 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2805 result = -EBADFD;
2806 goto end;
2807 }
2808 if (!frame_aligned(runtime, count)) {
2809 result = -EINVAL;
2810 goto end;
2811 }
2812 count = bytes_to_frames(runtime, count);
2813 result = snd_pcm_lib_write(substream, buf, count);
2814 if (result > 0)
2815 result = frames_to_bytes(runtime, result);
2816 end:
2817 return result;
2818}
2819
2820static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2821 unsigned long count, loff_t * offset)
2822
2823{
877211f5
TI		 2824 struct snd_pcm_file *pcm_file;
2825 struct snd_pcm_substream *substream;
2826 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2827 snd_pcm_sframes_t result;
2828 unsigned long i;
2829 void __user **bufs;
2830 snd_pcm_uframes_t frames;
2831
2832 pcm_file = file->private_data;
2833 substream = pcm_file->substream;
2834 snd_assert(substream != NULL, return -ENXIO);
2835 runtime = substream->runtime;
2836 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2837 return -EBADFD;
2838 if (count > 1024 || count != runtime->channels)
2839 return -EINVAL;
2840 if (!frame_aligned(runtime, _vector->iov_len))
2841 return -EINVAL;
2842 frames = bytes_to_samples(runtime, _vector->iov_len);
2843 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2844 if (bufs == NULL)
2845 return -ENOMEM;
2846 for (i = 0; i < count; ++i)
2847 bufs[i] = _vector[i].iov_base;
2848 result = snd_pcm_lib_readv(substream, bufs, frames);
2849 if (result > 0)
2850 result = frames_to_bytes(runtime, result);
2851 kfree(bufs);
2852 return result;
2853}
2854
2855static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2856 unsigned long count, loff_t * offset)
2857{
877211f5
TI		 2858 struct snd_pcm_file *pcm_file;
2859 struct snd_pcm_substream *substream;
2860 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2861 snd_pcm_sframes_t result;
2862 unsigned long i;
2863 void __user **bufs;
2864 snd_pcm_uframes_t frames;
2865
2866 pcm_file = file->private_data;
2867 substream = pcm_file->substream;
2868 snd_assert(substream != NULL, result = -ENXIO; goto end);
2869 runtime = substream->runtime;
2870 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2871 result = -EBADFD;
2872 goto end;
2873 }
2874 if (count > 128 || count != runtime->channels ||
2875 !frame_aligned(runtime, _vector->iov_len)) {
2876 result = -EINVAL;
2877 goto end;
2878 }
2879 frames = bytes_to_samples(runtime, _vector->iov_len);
2880 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2881 if (bufs == NULL)
2882 return -ENOMEM;
2883 for (i = 0; i < count; ++i)
2884 bufs[i] = _vector[i].iov_base;
2885 result = snd_pcm_lib_writev(substream, bufs, frames);
2886 if (result > 0)
2887 result = frames_to_bytes(runtime, result);
2888 kfree(bufs);
2889 end:
2890 return result;
2891}
2892
2893static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2894{
877211f5
TI		 2895 struct snd_pcm_file *pcm_file;
2896 struct snd_pcm_substream *substream;
2897 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2898 unsigned int mask;
2899 snd_pcm_uframes_t avail;
2900
2901 pcm_file = file->private_data;
2902
2903 substream = pcm_file->substream;
2904 snd_assert(substream != NULL, return -ENXIO);
2905 runtime = substream->runtime;
2906
2907 poll_wait(file, &runtime->sleep, wait);
2908
2909 snd_pcm_stream_lock_irq(substream);
2910 avail = snd_pcm_playback_avail(runtime);
2911 switch (runtime->status->state) {
2912 case SNDRV_PCM_STATE_RUNNING:
2913 case SNDRV_PCM_STATE_PREPARED:
2914 case SNDRV_PCM_STATE_PAUSED:
2915 if (avail >= runtime->control->avail_min) {
2916 mask = POLLOUT | POLLWRNORM;
2917 break;
2918 }
2919 /* Fall through */
2920 case SNDRV_PCM_STATE_DRAINING:
2921 mask = 0;
2922 break;
2923 default:
2924 mask = POLLOUT | POLLWRNORM | POLLERR;
2925 break;
2926 }
2927 snd_pcm_stream_unlock_irq(substream);
2928 return mask;
2929}
2930
2931static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2932{
877211f5
TI		 2933 struct snd_pcm_file *pcm_file;
2934 struct snd_pcm_substream *substream;
2935 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2936 unsigned int mask;
2937 snd_pcm_uframes_t avail;
2938
2939 pcm_file = file->private_data;
2940
2941 substream = pcm_file->substream;
2942 snd_assert(substream != NULL, return -ENXIO);
2943 runtime = substream->runtime;
2944
2945 poll_wait(file, &runtime->sleep, wait);
2946
2947 snd_pcm_stream_lock_irq(substream);
2948 avail = snd_pcm_capture_avail(runtime);
2949 switch (runtime->status->state) {
2950 case SNDRV_PCM_STATE_RUNNING:
2951 case SNDRV_PCM_STATE_PREPARED:
2952 case SNDRV_PCM_STATE_PAUSED:
2953 if (avail >= runtime->control->avail_min) {
2954 mask = POLLIN | POLLRDNORM;
2955 break;
2956 }
2957 mask = 0;
2958 break;
2959 case SNDRV_PCM_STATE_DRAINING:
2960 if (avail > 0) {
2961 mask = POLLIN | POLLRDNORM;
2962 break;
2963 }
2964 /* Fall through */
2965 default:
2966 mask = POLLIN | POLLRDNORM | POLLERR;
2967 break;
2968 }
2969 snd_pcm_stream_unlock_irq(substream);
2970 return mask;
2971}
2972
2973/*
2974 * mmap support
2975 */
2976
2977/*
2978 * Only on coherent architectures, we can mmap the status and the control records
2979 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2980 */
2981#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2982/*
2983 * mmap status record
2984 */
877211f5
TI		 2985static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
2986 unsigned long address, int *type)
1da177e4 2987{
877211f5
TI		 2988 struct snd_pcm_substream *substream = area->vm_private_data;
2989 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2990 struct page * page;
2991
2992 if (substream == NULL)
2993 return NOPAGE_OOM;
2994 runtime = substream->runtime;
2995 page = virt_to_page(runtime->status);
b5810039 2996 get_page(page);
1da177e4
LT		 2997 if (type)
2998 *type = VM_FAULT_MINOR;
2999 return page;
3000}
3001
3002static struct vm_operations_struct snd_pcm_vm_ops_status =
3003{
3004 .nopage = snd_pcm_mmap_status_nopage,
3005};
3006
877211f5 3007static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3008 struct vm_area_struct *area)
3009{
877211f5 3010 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3011 long size;
3012 if (!(area->vm_flags & VM_READ))
3013 return -EINVAL;
3014 runtime = substream->runtime;
3015 snd_assert(runtime != NULL, return -EAGAIN);
3016 size = area->vm_end - area->vm_start;
877211f5 3017 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3018 return -EINVAL;
3019 area->vm_ops = &snd_pcm_vm_ops_status;
3020 area->vm_private_data = substream;
3021 area->vm_flags |= VM_RESERVED;
3022 return 0;
3023}
3024
3025/*
3026 * mmap control record
3027 */
877211f5
TI		 3028static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3029 unsigned long address, int *type)
1da177e4 3030{
877211f5
TI		 3031 struct snd_pcm_substream *substream = area->vm_private_data;
3032 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3033 struct page * page;
3034
3035 if (substream == NULL)
3036 return NOPAGE_OOM;
3037 runtime = substream->runtime;
3038 page = virt_to_page(runtime->control);
b5810039 3039 get_page(page);
1da177e4
LT		 3040 if (type)
3041 *type = VM_FAULT_MINOR;
3042 return page;
3043}
3044
3045static struct vm_operations_struct snd_pcm_vm_ops_control =
3046{
3047 .nopage = snd_pcm_mmap_control_nopage,
3048};
3049
877211f5 3050static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3051 struct vm_area_struct *area)
3052{
877211f5 3053 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3054 long size;
3055 if (!(area->vm_flags & VM_READ))
3056 return -EINVAL;
3057 runtime = substream->runtime;
3058 snd_assert(runtime != NULL, return -EAGAIN);
3059 size = area->vm_end - area->vm_start;
877211f5 3060 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3061 return -EINVAL;
3062 area->vm_ops = &snd_pcm_vm_ops_control;
3063 area->vm_private_data = substream;
3064 area->vm_flags |= VM_RESERVED;
3065 return 0;
3066}
3067#else /* ! coherent mmap */
3068/*
3069 * don't support mmap for status and control records.
3070 */
877211f5 3071static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3072 struct vm_area_struct *area)
3073{
3074 return -ENXIO;
3075}
877211f5 3076static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3077 struct vm_area_struct *area)
3078{
3079 return -ENXIO;
3080}
3081#endif /* coherent mmap */
3082
3083/*
3084 * nopage callback for mmapping a RAM page
3085 */
877211f5
TI		 3086static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3087 unsigned long address, int *type)
1da177e4 3088{
877211f5
TI		 3089 struct snd_pcm_substream *substream = area->vm_private_data;
3090 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3091 unsigned long offset;
3092 struct page * page;
3093 void *vaddr;
3094 size_t dma_bytes;
3095
3096 if (substream == NULL)
3097 return NOPAGE_OOM;
3098 runtime = substream->runtime;
3099 offset = area->vm_pgoff << PAGE_SHIFT;
3100 offset += address - area->vm_start;
3101 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3102 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3103 if (offset > dma_bytes - PAGE_SIZE)
3104 return NOPAGE_SIGBUS;
3105 if (substream->ops->page) {
3106 page = substream->ops->page(substream, offset);
3107 if (! page)
3108 return NOPAGE_OOM;
3109 } else {
3110 vaddr = runtime->dma_area + offset;
3111 page = virt_to_page(vaddr);
3112 }
b5810039 3113 get_page(page);
1da177e4
LT		 3114 if (type)
3115 *type = VM_FAULT_MINOR;
3116 return page;
3117}
3118
3119static struct vm_operations_struct snd_pcm_vm_ops_data =
3120{
3121 .open = snd_pcm_mmap_data_open,
3122 .close = snd_pcm_mmap_data_close,
3123 .nopage = snd_pcm_mmap_data_nopage,
3124};
3125
3126/*
3127 * mmap the DMA buffer on RAM
3128 */
877211f5
TI		 3129static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3130 struct vm_area_struct *area)
1da177e4
LT		 3131{
3132 area->vm_ops = &snd_pcm_vm_ops_data;
3133 area->vm_private_data = substream;
3134 area->vm_flags |= VM_RESERVED;
3135 atomic_inc(&substream->runtime->mmap_count);
3136 return 0;
3137}
3138
3139/*
3140 * mmap the DMA buffer on I/O memory area
3141 */
3142#if SNDRV_PCM_INFO_MMAP_IOMEM
3143static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3144{
3145 .open = snd_pcm_mmap_data_open,
3146 .close = snd_pcm_mmap_data_close,
3147};
3148
877211f5
TI		 3149int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3150 struct vm_area_struct *area)
1da177e4
LT		 3151{
3152 long size;
3153 unsigned long offset;
3154
3155#ifdef pgprot_noncached
3156 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3157#endif
3158 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3159 area->vm_private_data = substream;
3160 area->vm_flags |= VM_IO;
3161 size = area->vm_end - area->vm_start;
3162 offset = area->vm_pgoff << PAGE_SHIFT;
3163 if (io_remap_pfn_range(area, area->vm_start,
3164 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3165 size, area->vm_page_prot))
3166 return -EAGAIN;
3167 atomic_inc(&substream->runtime->mmap_count);
3168 return 0;
3169}
3170#endif /* SNDRV_PCM_INFO_MMAP */
3171
3172/*
3173 * mmap DMA buffer
3174 */
877211f5 3175int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3176 struct vm_area_struct *area)
3177{
877211f5 3178 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3179 long size;
3180 unsigned long offset;
3181 size_t dma_bytes;
3182
3183 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3184 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3185 return -EINVAL;
3186 } else {
3187 if (!(area->vm_flags & VM_READ))
3188 return -EINVAL;
3189 }
3190 runtime = substream->runtime;
3191 snd_assert(runtime != NULL, return -EAGAIN);
3192 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3193 return -EBADFD;
3194 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3195 return -ENXIO;
3196 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3197 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3198 return -EINVAL;
3199 size = area->vm_end - area->vm_start;
3200 offset = area->vm_pgoff << PAGE_SHIFT;
3201 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3202 if ((size_t)size > dma_bytes)
3203 return -EINVAL;
3204 if (offset > dma_bytes - size)
3205 return -EINVAL;
3206
3207 if (substream->ops->mmap)
3208 return substream->ops->mmap(substream, area);
3209 else
3210 return snd_pcm_default_mmap(substream, area);
3211}
3212
3213static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3214{
877211f5
TI		 3215 struct snd_pcm_file * pcm_file;
3216 struct snd_pcm_substream *substream;
1da177e4
LT		 3217 unsigned long offset;
3218
3219 pcm_file = file->private_data;
3220 substream = pcm_file->substream;
3221 snd_assert(substream != NULL, return -ENXIO);
3222
3223 offset = area->vm_pgoff << PAGE_SHIFT;
3224 switch (offset) {
3225 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3226 if (substream->no_mmap_ctrl)
3227 return -ENXIO;
3228 return snd_pcm_mmap_status(substream, file, area);
3229 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3230 if (substream->no_mmap_ctrl)
3231 return -ENXIO;
3232 return snd_pcm_mmap_control(substream, file, area);
3233 default:
3234 return snd_pcm_mmap_data(substream, file, area);
3235 }
3236 return 0;
3237}
3238
3239static int snd_pcm_fasync(int fd, struct file * file, int on)
3240{
877211f5
TI		 3241 struct snd_pcm_file * pcm_file;
3242 struct snd_pcm_substream *substream;
3243 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3244 int err;
3245
3246 pcm_file = file->private_data;
3247 substream = pcm_file->substream;
3248 snd_assert(substream != NULL, return -ENXIO);
3249 runtime = substream->runtime;
3250
3251 err = fasync_helper(fd, file, on, &runtime->fasync);
3252 if (err < 0)
3253 return err;
3254 return 0;
3255}
3256
3257/*
3258 * ioctl32 compat
3259 */
3260#ifdef CONFIG_COMPAT
3261#include "pcm_compat.c"
3262#else
3263#define snd_pcm_ioctl_compat NULL
3264#endif
3265
3266/*
3267 * To be removed helpers to keep binary compatibility
3268 */
3269
59d48582 3270#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3271#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3272#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3273
877211f5
TI		 3274static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3275 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3276{
3277 unsigned int i;
3278
3279 memset(params, 0, sizeof(*params));
3280 params->flags = oparams->flags;
3281 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3282 params->masks[i].bits[0] = oparams->masks[i];
3283 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3284 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3285 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3286 params->info = oparams->info;
3287 params->msbits = oparams->msbits;
3288 params->rate_num = oparams->rate_num;
3289 params->rate_den = oparams->rate_den;
3290 params->fifo_size = oparams->fifo_size;
3291}
3292
877211f5
TI		 3293static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3294 struct snd_pcm_hw_params *params)
1da177e4
LT		 3295{
3296 unsigned int i;
3297
3298 memset(oparams, 0, sizeof(*oparams));
3299 oparams->flags = params->flags;
3300 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3301 oparams->masks[i] = params->masks[i].bits[0];
3302 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3303 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3304 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3305 oparams->info = params->info;
3306 oparams->msbits = params->msbits;
3307 oparams->rate_num = params->rate_num;
3308 oparams->rate_den = params->rate_den;
3309 oparams->fifo_size = params->fifo_size;
3310}
3311
877211f5
TI		 3312static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3313 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3314{
877211f5
TI		 3315 struct snd_pcm_hw_params *params;
3316 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3317 int err;
3318
3319 params = kmalloc(sizeof(*params), GFP_KERNEL);
3320 if (!params) {
3321 err = -ENOMEM;
3322 goto out;
3323 }
3324 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3325 if (!oparams) {
3326 err = -ENOMEM;
3327 goto out;
3328 }
3329
3330 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3331 err = -EFAULT;
3332 goto out;
3333 }
3334 snd_pcm_hw_convert_from_old_params(params, oparams);
3335 err = snd_pcm_hw_refine(substream, params);
3336 snd_pcm_hw_convert_to_old_params(oparams, params);
3337 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3338 if (!err)
3339 err = -EFAULT;
3340 }
3341out:
3342 kfree(params);
3343 kfree(oparams);
3344 return err;
3345}
3346
877211f5
TI		 3347static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3348 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3349{
877211f5
TI		 3350 struct snd_pcm_hw_params *params;
3351 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3352 int err;
3353
3354 params = kmalloc(sizeof(*params), GFP_KERNEL);
3355 if (!params) {
3356 err = -ENOMEM;
3357 goto out;
3358 }
3359 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3360 if (!oparams) {
3361 err = -ENOMEM;
3362 goto out;
3363 }
3364 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3365 err = -EFAULT;
3366 goto out;
3367 }
3368 snd_pcm_hw_convert_from_old_params(params, oparams);
3369 err = snd_pcm_hw_params(substream, params);
3370 snd_pcm_hw_convert_to_old_params(oparams, params);
3371 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3372 if (!err)
3373 err = -EFAULT;
3374 }
3375out:
3376 kfree(params);
3377 kfree(oparams);
3378 return err;
3379}
59d48582 3380#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4
LT		 3381
3382/*
3383 * Register section
3384 */
3385
2af677fc 3386struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3387 {
2af677fc
CL		 3388 .owner = THIS_MODULE,
3389 .write = snd_pcm_write,
3390 .writev = snd_pcm_writev,
f87135f5 3391 .open = snd_pcm_playback_open,
2af677fc
CL		 3392 .release = snd_pcm_release,
3393 .poll = snd_pcm_playback_poll,
3394 .unlocked_ioctl = snd_pcm_playback_ioctl,
3395 .compat_ioctl = snd_pcm_ioctl_compat,
3396 .mmap = snd_pcm_mmap,
3397 .fasync = snd_pcm_fasync,
1da177e4
LT		 3398 },
3399 {
2af677fc
CL		 3400 .owner = THIS_MODULE,
3401 .read = snd_pcm_read,
3402 .readv = snd_pcm_readv,
f87135f5 3403 .open = snd_pcm_capture_open,
2af677fc
CL		 3404 .release = snd_pcm_release,
3405 .poll = snd_pcm_capture_poll,
3406 .unlocked_ioctl = snd_pcm_capture_ioctl,
3407 .compat_ioctl = snd_pcm_ioctl_compat,
3408 .mmap = snd_pcm_mmap,
3409 .fasync = snd_pcm_fasync,
1da177e4
LT		 3410 }
3411};
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