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[ALSA] Optimize for config without PROC_FS (pci drivers)
[GitHub/mt8127/android_kernel_alcatel_ttab.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
877211f5
TI		 58#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
59#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 60
877211f5
TI		 61static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
62 struct snd_pcm_hw_params_old __user * _oparams);
63static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params_old __user * _oparams);
f87135f5 65static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 66
67/*
68 *
69 */
70
71DEFINE_RWLOCK(snd_pcm_link_rwlock);
72static DECLARE_RWSEM(snd_pcm_link_rwsem);
73
74
75static inline mm_segment_t snd_enter_user(void)
76{
77 mm_segment_t fs = get_fs();
78 set_fs(get_ds());
79 return fs;
80}
81
82static inline void snd_leave_user(mm_segment_t fs)
83{
84 set_fs(fs);
85}
86
87
88
877211f5 89int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 90{
877211f5
TI		 91 struct snd_pcm_runtime *runtime;
92 struct snd_pcm *pcm = substream->pcm;
93 struct snd_pcm_str *pstr = substream->pstr;
1da177e4
LT		 94
95 snd_assert(substream != NULL, return -ENXIO);
96 memset(info, 0, sizeof(*info));
97 info->card = pcm->card->number;
98 info->device = pcm->device;
99 info->stream = substream->stream;
100 info->subdevice = substream->number;
101 strlcpy(info->id, pcm->id, sizeof(info->id));
102 strlcpy(info->name, pcm->name, sizeof(info->name));
103 info->dev_class = pcm->dev_class;
104 info->dev_subclass = pcm->dev_subclass;
105 info->subdevices_count = pstr->substream_count;
106 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
107 strlcpy(info->subname, substream->name, sizeof(info->subname));
108 runtime = substream->runtime;
109 /* AB: FIXME!!! This is definitely nonsense */
110 if (runtime) {
111 info->sync = runtime->sync;
112 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
113 }
114 return 0;
115}
116
877211f5
TI		 117int snd_pcm_info_user(struct snd_pcm_substream *substream,
118 struct snd_pcm_info __user * _info)
1da177e4 119{
877211f5 120 struct snd_pcm_info *info;
1da177e4
LT		 121 int err;
122
123 info = kmalloc(sizeof(*info), GFP_KERNEL);
124 if (! info)
125 return -ENOMEM;
126 err = snd_pcm_info(substream, info);
127 if (err >= 0) {
128 if (copy_to_user(_info, info, sizeof(*info)))
129 err = -EFAULT;
130 }
131 kfree(info);
132 return err;
133}
134
135#undef RULES_DEBUG
136
137#ifdef RULES_DEBUG
138#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
139char *snd_pcm_hw_param_names[] = {
140 HW_PARAM(ACCESS),
141 HW_PARAM(FORMAT),
142 HW_PARAM(SUBFORMAT),
143 HW_PARAM(SAMPLE_BITS),
144 HW_PARAM(FRAME_BITS),
145 HW_PARAM(CHANNELS),
146 HW_PARAM(RATE),
147 HW_PARAM(PERIOD_TIME),
148 HW_PARAM(PERIOD_SIZE),
149 HW_PARAM(PERIOD_BYTES),
150 HW_PARAM(PERIODS),
151 HW_PARAM(BUFFER_TIME),
152 HW_PARAM(BUFFER_SIZE),
153 HW_PARAM(BUFFER_BYTES),
154 HW_PARAM(TICK_TIME),
155};
156#endif
157
877211f5
TI		 158int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
159 struct snd_pcm_hw_params *params)
1da177e4
LT		 160{
161 unsigned int k;
877211f5
TI		 162 struct snd_pcm_hardware *hw;
163 struct snd_interval *i = NULL;
164 struct snd_mask *m = NULL;
165 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 166 unsigned int rstamps[constrs->rules_num];
167 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
168 unsigned int stamp = 2;
169 int changed, again;
170
171 params->info = 0;
172 params->fifo_size = 0;
173 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
174 params->msbits = 0;
175 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
176 params->rate_num = 0;
177 params->rate_den = 0;
178 }
179
180 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
181 m = hw_param_mask(params, k);
182 if (snd_mask_empty(m))
183 return -EINVAL;
184 if (!(params->rmask & (1 << k)))
185 continue;
186#ifdef RULES_DEBUG
187 printk("%s = ", snd_pcm_hw_param_names[k]);
188 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
189#endif
190 changed = snd_mask_refine(m, constrs_mask(constrs, k));
191#ifdef RULES_DEBUG
192 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
193#endif
194 if (changed)
195 params->cmask |= 1 << k;
196 if (changed < 0)
197 return changed;
198 }
199
200 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
201 i = hw_param_interval(params, k);
202 if (snd_interval_empty(i))
203 return -EINVAL;
204 if (!(params->rmask & (1 << k)))
205 continue;
206#ifdef RULES_DEBUG
207 printk("%s = ", snd_pcm_hw_param_names[k]);
208 if (i->empty)
209 printk("empty");
210 else
211 printk("%c%u %u%c",
212 i->openmin ? '(' : '[', i->min,
213 i->max, i->openmax ? ')' : ']');
214 printk(" -> ");
215#endif
216 changed = snd_interval_refine(i, constrs_interval(constrs, k));
217#ifdef RULES_DEBUG
218 if (i->empty)
219 printk("empty\n");
220 else
221 printk("%c%u %u%c\n",
222 i->openmin ? '(' : '[', i->min,
223 i->max, i->openmax ? ')' : ']');
224#endif
225 if (changed)
226 params->cmask |= 1 << k;
227 if (changed < 0)
228 return changed;
229 }
230
231 for (k = 0; k < constrs->rules_num; k++)
232 rstamps[k] = 0;
233 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
234 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
235 do {
236 again = 0;
237 for (k = 0; k < constrs->rules_num; k++) {
877211f5 238 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 239 unsigned int d;
240 int doit = 0;
241 if (r->cond && !(r->cond & params->flags))
242 continue;
243 for (d = 0; r->deps[d] >= 0; d++) {
244 if (vstamps[r->deps[d]] > rstamps[k]) {
245 doit = 1;
246 break;
247 }
248 }
249 if (!doit)
250 continue;
251#ifdef RULES_DEBUG
252 printk("Rule %d [%p]: ", k, r->func);
253 if (r->var >= 0) {
254 printk("%s = ", snd_pcm_hw_param_names[r->var]);
255 if (hw_is_mask(r->var)) {
256 m = hw_param_mask(params, r->var);
257 printk("%x", *m->bits);
258 } else {
259 i = hw_param_interval(params, r->var);
260 if (i->empty)
261 printk("empty");
262 else
263 printk("%c%u %u%c",
264 i->openmin ? '(' : '[', i->min,
265 i->max, i->openmax ? ')' : ']');
266 }
267 }
268#endif
269 changed = r->func(params, r);
270#ifdef RULES_DEBUG
271 if (r->var >= 0) {
272 printk(" -> ");
273 if (hw_is_mask(r->var))
274 printk("%x", *m->bits);
275 else {
276 if (i->empty)
277 printk("empty");
278 else
279 printk("%c%u %u%c",
280 i->openmin ? '(' : '[', i->min,
281 i->max, i->openmax ? ')' : ']');
282 }
283 }
284 printk("\n");
285#endif
286 rstamps[k] = stamp;
287 if (changed && r->var >= 0) {
288 params->cmask |= (1 << r->var);
289 vstamps[r->var] = stamp;
290 again = 1;
291 }
292 if (changed < 0)
293 return changed;
294 stamp++;
295 }
296 } while (again);
297 if (!params->msbits) {
298 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
299 if (snd_interval_single(i))
300 params->msbits = snd_interval_value(i);
301 }
302
303 if (!params->rate_den) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
305 if (snd_interval_single(i)) {
306 params->rate_num = snd_interval_value(i);
307 params->rate_den = 1;
308 }
309 }
310
311 hw = &substream->runtime->hw;
312 if (!params->info)
313 params->info = hw->info;
314 if (!params->fifo_size)
315 params->fifo_size = hw->fifo_size;
316 params->rmask = 0;
317 return 0;
318}
319
877211f5
TI		 320static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
321 struct snd_pcm_hw_params __user * _params)
1da177e4 322{
877211f5 323 struct snd_pcm_hw_params *params;
1da177e4
LT		 324 int err;
325
326 params = kmalloc(sizeof(*params), GFP_KERNEL);
327 if (!params) {
328 err = -ENOMEM;
329 goto out;
330 }
331 if (copy_from_user(params, _params, sizeof(*params))) {
332 err = -EFAULT;
333 goto out;
334 }
335 err = snd_pcm_hw_refine(substream, params);
336 if (copy_to_user(_params, params, sizeof(*params))) {
337 if (!err)
338 err = -EFAULT;
339 }
340out:
341 kfree(params);
342 return err;
343}
344
877211f5
TI		 345static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
346 struct snd_pcm_hw_params *params)
1da177e4 347{
877211f5 348 struct snd_pcm_runtime *runtime;
1da177e4
LT		 349 int err;
350 unsigned int bits;
351 snd_pcm_uframes_t frames;
352
353 snd_assert(substream != NULL, return -ENXIO);
354 runtime = substream->runtime;
355 snd_assert(runtime != NULL, return -ENXIO);
356 snd_pcm_stream_lock_irq(substream);
357 switch (runtime->status->state) {
358 case SNDRV_PCM_STATE_OPEN:
359 case SNDRV_PCM_STATE_SETUP:
360 case SNDRV_PCM_STATE_PREPARED:
361 break;
362 default:
363 snd_pcm_stream_unlock_irq(substream);
364 return -EBADFD;
365 }
366 snd_pcm_stream_unlock_irq(substream);
367#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
368 if (!substream->oss.oss)
369#endif
370 if (atomic_read(&runtime->mmap_count))
371 return -EBADFD;
372
373 params->rmask = ~0U;
374 err = snd_pcm_hw_refine(substream, params);
375 if (err < 0)
376 goto _error;
377
378 err = snd_pcm_hw_params_choose(substream, params);
379 if (err < 0)
380 goto _error;
381
382 if (substream->ops->hw_params != NULL) {
383 err = substream->ops->hw_params(substream, params);
384 if (err < 0)
385 goto _error;
386 }
387
388 runtime->access = params_access(params);
389 runtime->format = params_format(params);
390 runtime->subformat = params_subformat(params);
391 runtime->channels = params_channels(params);
392 runtime->rate = params_rate(params);
393 runtime->period_size = params_period_size(params);
394 runtime->periods = params_periods(params);
395 runtime->buffer_size = params_buffer_size(params);
396 runtime->tick_time = params_tick_time(params);
397 runtime->info = params->info;
398 runtime->rate_num = params->rate_num;
399 runtime->rate_den = params->rate_den;
400
401 bits = snd_pcm_format_physical_width(runtime->format);
402 runtime->sample_bits = bits;
403 bits *= runtime->channels;
404 runtime->frame_bits = bits;
405 frames = 1;
406 while (bits % 8 != 0) {
407 bits *= 2;
408 frames *= 2;
409 }
410 runtime->byte_align = bits / 8;
411 runtime->min_align = frames;
412
413 /* Default sw params */
414 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
415 runtime->period_step = 1;
416 runtime->sleep_min = 0;
417 runtime->control->avail_min = runtime->period_size;
418 runtime->xfer_align = runtime->period_size;
419 runtime->start_threshold = 1;
420 runtime->stop_threshold = runtime->buffer_size;
421 runtime->silence_threshold = 0;
422 runtime->silence_size = 0;
423 runtime->boundary = runtime->buffer_size;
424 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
425 runtime->boundary *= 2;
426
427 snd_pcm_timer_resolution_change(substream);
428 runtime->status->state = SNDRV_PCM_STATE_SETUP;
429 return 0;
430 _error:
431 /* hardware might be unuseable from this time,
432 so we force application to retry to set
433 the correct hardware parameter settings */
434 runtime->status->state = SNDRV_PCM_STATE_OPEN;
435 if (substream->ops->hw_free != NULL)
436 substream->ops->hw_free(substream);
437 return err;
438}
439
877211f5
TI		 440static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
441 struct snd_pcm_hw_params __user * _params)
1da177e4 442{
877211f5 443 struct snd_pcm_hw_params *params;
1da177e4
LT		 444 int err;
445
446 params = kmalloc(sizeof(*params), GFP_KERNEL);
447 if (!params) {
448 err = -ENOMEM;
449 goto out;
450 }
451 if (copy_from_user(params, _params, sizeof(*params))) {
452 err = -EFAULT;
453 goto out;
454 }
455 err = snd_pcm_hw_params(substream, params);
456 if (copy_to_user(_params, params, sizeof(*params))) {
457 if (!err)
458 err = -EFAULT;
459 }
460out:
461 kfree(params);
462 return err;
463}
464
877211f5 465static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 466{
877211f5 467 struct snd_pcm_runtime *runtime;
1da177e4
LT		 468 int result = 0;
469
470 snd_assert(substream != NULL, return -ENXIO);
471 runtime = substream->runtime;
472 snd_assert(runtime != NULL, return -ENXIO);
473 snd_pcm_stream_lock_irq(substream);
474 switch (runtime->status->state) {
475 case SNDRV_PCM_STATE_SETUP:
476 case SNDRV_PCM_STATE_PREPARED:
477 break;
478 default:
479 snd_pcm_stream_unlock_irq(substream);
480 return -EBADFD;
481 }
482 snd_pcm_stream_unlock_irq(substream);
483 if (atomic_read(&runtime->mmap_count))
484 return -EBADFD;
485 if (substream->ops->hw_free)
486 result = substream->ops->hw_free(substream);
487 runtime->status->state = SNDRV_PCM_STATE_OPEN;
488 return result;
489}
490
877211f5
TI		 491static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
492 struct snd_pcm_sw_params *params)
1da177e4 493{
877211f5 494 struct snd_pcm_runtime *runtime;
1da177e4
LT		 495
496 snd_assert(substream != NULL, return -ENXIO);
497 runtime = substream->runtime;
498 snd_assert(runtime != NULL, return -ENXIO);
499 snd_pcm_stream_lock_irq(substream);
500 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
501 snd_pcm_stream_unlock_irq(substream);
502 return -EBADFD;
503 }
504 snd_pcm_stream_unlock_irq(substream);
505
506 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
507 return -EINVAL;
508 if (params->avail_min == 0)
509 return -EINVAL;
510 if (params->xfer_align == 0 ||
511 params->xfer_align % runtime->min_align != 0)
512 return -EINVAL;
513 if (params->silence_size >= runtime->boundary) {
514 if (params->silence_threshold != 0)
515 return -EINVAL;
516 } else {
517 if (params->silence_size > params->silence_threshold)
518 return -EINVAL;
519 if (params->silence_threshold > runtime->buffer_size)
520 return -EINVAL;
521 }
522 snd_pcm_stream_lock_irq(substream);
523 runtime->tstamp_mode = params->tstamp_mode;
524 runtime->sleep_min = params->sleep_min;
525 runtime->period_step = params->period_step;
526 runtime->control->avail_min = params->avail_min;
527 runtime->start_threshold = params->start_threshold;
528 runtime->stop_threshold = params->stop_threshold;
529 runtime->silence_threshold = params->silence_threshold;
530 runtime->silence_size = params->silence_size;
531 runtime->xfer_align = params->xfer_align;
532 params->boundary = runtime->boundary;
533 if (snd_pcm_running(substream)) {
534 if (runtime->sleep_min)
535 snd_pcm_tick_prepare(substream);
536 else
537 snd_pcm_tick_set(substream, 0);
538 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
539 runtime->silence_size > 0)
540 snd_pcm_playback_silence(substream, ULONG_MAX);
541 wake_up(&runtime->sleep);
542 }
543 snd_pcm_stream_unlock_irq(substream);
544 return 0;
545}
546
877211f5
TI		 547static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
548 struct snd_pcm_sw_params __user * _params)
1da177e4 549{
877211f5 550 struct snd_pcm_sw_params params;
1da177e4
LT		 551 int err;
552 if (copy_from_user(&params, _params, sizeof(params)))
553 return -EFAULT;
554 err = snd_pcm_sw_params(substream, &params);
555 if (copy_to_user(_params, &params, sizeof(params)))
556 return -EFAULT;
557 return err;
558}
559
877211f5
TI		 560int snd_pcm_status(struct snd_pcm_substream *substream,
561 struct snd_pcm_status *status)
1da177e4 562{
877211f5 563 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 564
565 snd_pcm_stream_lock_irq(substream);
566 status->state = runtime->status->state;
567 status->suspended_state = runtime->status->suspended_state;
568 if (status->state == SNDRV_PCM_STATE_OPEN)
569 goto _end;
570 status->trigger_tstamp = runtime->trigger_tstamp;
571 if (snd_pcm_running(substream)) {
572 snd_pcm_update_hw_ptr(substream);
573 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
574 status->tstamp = runtime->status->tstamp;
575 else
07799e75 576 getnstimeofday(&status->tstamp);
1da177e4 577 } else
07799e75 578 getnstimeofday(&status->tstamp);
1da177e4
LT		 579 status->appl_ptr = runtime->control->appl_ptr;
580 status->hw_ptr = runtime->status->hw_ptr;
581 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
582 status->avail = snd_pcm_playback_avail(runtime);
583 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
584 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
585 status->delay = runtime->buffer_size - status->avail;
586 else
587 status->delay = 0;
588 } else {
589 status->avail = snd_pcm_capture_avail(runtime);
590 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
591 status->delay = status->avail;
592 else
593 status->delay = 0;
594 }
595 status->avail_max = runtime->avail_max;
596 status->overrange = runtime->overrange;
597 runtime->avail_max = 0;
598 runtime->overrange = 0;
599 _end:
600 snd_pcm_stream_unlock_irq(substream);
601 return 0;
602}
603
877211f5
TI		 604static int snd_pcm_status_user(struct snd_pcm_substream *substream,
605 struct snd_pcm_status __user * _status)
1da177e4 606{
877211f5
TI		 607 struct snd_pcm_status status;
608 struct snd_pcm_runtime *runtime;
1da177e4
LT		 609 int res;
610
611 snd_assert(substream != NULL, return -ENXIO);
612 runtime = substream->runtime;
613 memset(&status, 0, sizeof(status));
614 res = snd_pcm_status(substream, &status);
615 if (res < 0)
616 return res;
617 if (copy_to_user(_status, &status, sizeof(status)))
618 return -EFAULT;
619 return 0;
620}
621
877211f5
TI		 622static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
623 struct snd_pcm_channel_info * info)
1da177e4 624{
877211f5 625 struct snd_pcm_runtime *runtime;
1da177e4
LT		 626 unsigned int channel;
627
628 snd_assert(substream != NULL, return -ENXIO);
629 channel = info->channel;
630 runtime = substream->runtime;
631 snd_pcm_stream_lock_irq(substream);
632 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
633 snd_pcm_stream_unlock_irq(substream);
634 return -EBADFD;
635 }
636 snd_pcm_stream_unlock_irq(substream);
637 if (channel >= runtime->channels)
638 return -EINVAL;
639 memset(info, 0, sizeof(*info));
640 info->channel = channel;
641 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
642}
643
877211f5
TI		 644static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
645 struct snd_pcm_channel_info __user * _info)
1da177e4 646{
877211f5 647 struct snd_pcm_channel_info info;
1da177e4
LT		 648 int res;
649
650 if (copy_from_user(&info, _info, sizeof(info)))
651 return -EFAULT;
652 res = snd_pcm_channel_info(substream, &info);
653 if (res < 0)
654 return res;
655 if (copy_to_user(_info, &info, sizeof(info)))
656 return -EFAULT;
657 return 0;
658}
659
877211f5 660static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 661{
877211f5 662 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 663 if (runtime->trigger_master == NULL)
664 return;
665 if (runtime->trigger_master == substream) {
07799e75 666 getnstimeofday(&runtime->trigger_tstamp);
1da177e4
LT		 667 } else {
668 snd_pcm_trigger_tstamp(runtime->trigger_master);
669 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
670 }
671 runtime->trigger_master = NULL;
672}
673
674struct action_ops {
877211f5
TI		 675 int (*pre_action)(struct snd_pcm_substream *substream, int state);
676 int (*do_action)(struct snd_pcm_substream *substream, int state);
677 void (*undo_action)(struct snd_pcm_substream *substream, int state);
678 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 679};
680
681/*
682 * this functions is core for handling of linked stream
683 * Note: the stream state might be changed also on failure
684 * Note2: call with calling stream lock + link lock
685 */
686static int snd_pcm_action_group(struct action_ops *ops,
877211f5 687 struct snd_pcm_substream *substream,
1da177e4
LT		 688 int state, int do_lock)
689{
690 struct list_head *pos;
877211f5
TI		 691 struct snd_pcm_substream *s = NULL;
692 struct snd_pcm_substream *s1;
1da177e4
LT		 693 int res = 0;
694
695 snd_pcm_group_for_each(pos, substream) {
696 s = snd_pcm_group_substream_entry(pos);
697 if (do_lock && s != substream)
698 spin_lock(&s->self_group.lock);
699 res = ops->pre_action(s, state);
700 if (res < 0)
701 goto _unlock;
702 }
703 snd_pcm_group_for_each(pos, substream) {
704 s = snd_pcm_group_substream_entry(pos);
705 res = ops->do_action(s, state);
706 if (res < 0) {
707 if (ops->undo_action) {
708 snd_pcm_group_for_each(pos, substream) {
709 s1 = snd_pcm_group_substream_entry(pos);
710 if (s1 == s) /* failed stream */
711 break;
712 ops->undo_action(s1, state);
713 }
714 }
715 s = NULL; /* unlock all */
716 goto _unlock;
717 }
718 }
719 snd_pcm_group_for_each(pos, substream) {
720 s = snd_pcm_group_substream_entry(pos);
721 ops->post_action(s, state);
722 }
723 _unlock:
724 if (do_lock) {
725 /* unlock streams */
726 snd_pcm_group_for_each(pos, substream) {
727 s1 = snd_pcm_group_substream_entry(pos);
728 if (s1 != substream)
729 spin_unlock(&s1->self_group.lock);
730 if (s1 == s) /* end */
731 break;
732 }
733 }
734 return res;
735}
736
737/*
738 * Note: call with stream lock
739 */
740static int snd_pcm_action_single(struct action_ops *ops,
877211f5 741 struct snd_pcm_substream *substream,
1da177e4
LT		 742 int state)
743{
744 int res;
745
746 res = ops->pre_action(substream, state);
747 if (res < 0)
748 return res;
749 res = ops->do_action(substream, state);
750 if (res == 0)
751 ops->post_action(substream, state);
752 else if (ops->undo_action)
753 ops->undo_action(substream, state);
754 return res;
755}
756
757/*
758 * Note: call with stream lock
759 */
760static int snd_pcm_action(struct action_ops *ops,
877211f5 761 struct snd_pcm_substream *substream,
1da177e4
LT		 762 int state)
763{
764 int res;
765
766 if (snd_pcm_stream_linked(substream)) {
767 if (!spin_trylock(&substream->group->lock)) {
768 spin_unlock(&substream->self_group.lock);
769 spin_lock(&substream->group->lock);
770 spin_lock(&substream->self_group.lock);
771 }
772 res = snd_pcm_action_group(ops, substream, state, 1);
773 spin_unlock(&substream->group->lock);
774 } else {
775 res = snd_pcm_action_single(ops, substream, state);
776 }
777 return res;
778}
779
780/*
781 * Note: don't use any locks before
782 */
783static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 784 struct snd_pcm_substream *substream,
1da177e4
LT		 785 int state)
786{
787 int res;
788
789 read_lock_irq(&snd_pcm_link_rwlock);
790 if (snd_pcm_stream_linked(substream)) {
791 spin_lock(&substream->group->lock);
792 spin_lock(&substream->self_group.lock);
793 res = snd_pcm_action_group(ops, substream, state, 1);
794 spin_unlock(&substream->self_group.lock);
795 spin_unlock(&substream->group->lock);
796 } else {
797 spin_lock(&substream->self_group.lock);
798 res = snd_pcm_action_single(ops, substream, state);
799 spin_unlock(&substream->self_group.lock);
800 }
801 read_unlock_irq(&snd_pcm_link_rwlock);
802 return res;
803}
804
805/*
806 */
807static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 808 struct snd_pcm_substream *substream,
1da177e4
LT		 809 int state)
810{
811 int res;
812
813 down_read(&snd_pcm_link_rwsem);
814 if (snd_pcm_stream_linked(substream))
815 res = snd_pcm_action_group(ops, substream, state, 0);
816 else
817 res = snd_pcm_action_single(ops, substream, state);
818 up_read(&snd_pcm_link_rwsem);
819 return res;
820}
821
822/*
823 * start callbacks
824 */
877211f5 825static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 826{
877211f5 827 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 828 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
829 return -EBADFD;
830 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
831 !snd_pcm_playback_data(substream))
832 return -EPIPE;
833 runtime->trigger_master = substream;
834 return 0;
835}
836
877211f5 837static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 838{
839 if (substream->runtime->trigger_master != substream)
840 return 0;
841 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
842}
843
877211f5 844static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 845{
846 if (substream->runtime->trigger_master == substream)
847 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
848}
849
877211f5 850static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 851{
877211f5 852 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 853 snd_pcm_trigger_tstamp(substream);
854 runtime->status->state = state;
855 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
856 runtime->silence_size > 0)
857 snd_pcm_playback_silence(substream, ULONG_MAX);
858 if (runtime->sleep_min)
859 snd_pcm_tick_prepare(substream);
860 if (substream->timer)
877211f5
TI		 861 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
862 &runtime->trigger_tstamp);
1da177e4
LT		 863}
864
865static struct action_ops snd_pcm_action_start = {
866 .pre_action = snd_pcm_pre_start,
867 .do_action = snd_pcm_do_start,
868 .undo_action = snd_pcm_undo_start,
869 .post_action = snd_pcm_post_start
870};
871
872/**
873 * snd_pcm_start
df8db936 874 * @substream: the PCM substream instance
1da177e4
LT		 875 *
876 * Start all linked streams.
877 */
877211f5 878int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 879{
877211f5
TI		 880 return snd_pcm_action(&snd_pcm_action_start, substream,
881 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 882}
883
884/*
885 * stop callbacks
886 */
877211f5 887static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 888{
877211f5 889 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 890 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
891 return -EBADFD;
892 runtime->trigger_master = substream;
893 return 0;
894}
895
877211f5 896static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 897{
898 if (substream->runtime->trigger_master == substream &&
899 snd_pcm_running(substream))
900 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
901 return 0; /* unconditonally stop all substreams */
902}
903
877211f5 904static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 905{
877211f5 906 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 907 if (runtime->status->state != state) {
908 snd_pcm_trigger_tstamp(substream);
909 if (substream->timer)
877211f5
TI		 910 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
911 &runtime->trigger_tstamp);
1da177e4
LT		 912 runtime->status->state = state;
913 snd_pcm_tick_set(substream, 0);
914 }
915 wake_up(&runtime->sleep);
916}
917
918static struct action_ops snd_pcm_action_stop = {
919 .pre_action = snd_pcm_pre_stop,
920 .do_action = snd_pcm_do_stop,
921 .post_action = snd_pcm_post_stop
922};
923
924/**
925 * snd_pcm_stop
df8db936
TI		 926 * @substream: the PCM substream instance
927 * @state: PCM state after stopping the stream
1da177e4
LT		 928 *
929 * Try to stop all running streams in the substream group.
930 * The state of each stream is changed to the given value after that unconditionally.
931 */
877211f5 932int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 933{
934 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
935}
936
937/**
938 * snd_pcm_drain_done
df8db936 939 * @substream: the PCM substream
1da177e4
LT		 940 *
941 * Stop the DMA only when the given stream is playback.
942 * The state is changed to SETUP.
943 * Unlike snd_pcm_stop(), this affects only the given stream.
944 */
877211f5 945int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 946{
877211f5
TI		 947 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
948 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 949}
950
951/*
952 * pause callbacks
953 */
877211f5 954static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 955{
877211f5 956 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 957 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
958 return -ENOSYS;
959 if (push) {
960 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
961 return -EBADFD;
962 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
963 return -EBADFD;
964 runtime->trigger_master = substream;
965 return 0;
966}
967
877211f5 968static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 969{
970 if (substream->runtime->trigger_master != substream)
971 return 0;
972 return substream->ops->trigger(substream,
973 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
974 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
975}
976
877211f5 977static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 978{
979 if (substream->runtime->trigger_master == substream)
980 substream->ops->trigger(substream,
981 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
982 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
983}
984
877211f5 985static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 986{
877211f5 987 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 988 snd_pcm_trigger_tstamp(substream);
989 if (push) {
990 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
991 if (substream->timer)
877211f5
TI		 992 snd_timer_notify(substream->timer,
993 SNDRV_TIMER_EVENT_MPAUSE,
994 &runtime->trigger_tstamp);
1da177e4
LT		 995 snd_pcm_tick_set(substream, 0);
996 wake_up(&runtime->sleep);
997 } else {
998 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
999 if (runtime->sleep_min)
1000 snd_pcm_tick_prepare(substream);
1001 if (substream->timer)
877211f5
TI		 1002 snd_timer_notify(substream->timer,
1003 SNDRV_TIMER_EVENT_MCONTINUE,
1004 &runtime->trigger_tstamp);
1da177e4
LT		 1005 }
1006}
1007
1008static struct action_ops snd_pcm_action_pause = {
1009 .pre_action = snd_pcm_pre_pause,
1010 .do_action = snd_pcm_do_pause,
1011 .undo_action = snd_pcm_undo_pause,
1012 .post_action = snd_pcm_post_pause
1013};
1014
1015/*
1016 * Push/release the pause for all linked streams.
1017 */
877211f5 1018static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1019{
1020 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1021}
1022
1023#ifdef CONFIG_PM
1024/* suspend */
1025
877211f5 1026static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1027{
877211f5 1028 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1029 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1030 return -EBUSY;
1031 runtime->trigger_master = substream;
1032 return 0;
1033}
1034
877211f5 1035static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1036{
877211f5 1037 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1038 if (runtime->trigger_master != substream)
1039 return 0;
1040 if (! snd_pcm_running(substream))
1041 return 0;
1042 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1043 return 0; /* suspend unconditionally */
1044}
1045
877211f5 1046static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1047{
877211f5 1048 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1049 snd_pcm_trigger_tstamp(substream);
1050 if (substream->timer)
877211f5
TI		 1051 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1052 &runtime->trigger_tstamp);
1da177e4
LT		 1053 runtime->status->suspended_state = runtime->status->state;
1054 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1055 snd_pcm_tick_set(substream, 0);
1056 wake_up(&runtime->sleep);
1057}
1058
1059static struct action_ops snd_pcm_action_suspend = {
1060 .pre_action = snd_pcm_pre_suspend,
1061 .do_action = snd_pcm_do_suspend,
1062 .post_action = snd_pcm_post_suspend
1063};
1064
1065/**
1066 * snd_pcm_suspend
df8db936 1067 * @substream: the PCM substream
1da177e4
LT		 1068 *
1069 * Trigger SUSPEND to all linked streams.
1070 * After this call, all streams are changed to SUSPENDED state.
1071 */
877211f5 1072int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1073{
1074 int err;
1075 unsigned long flags;
1076
603bf524
TI		 1077 if (! substream)
1078 return 0;
1079
1da177e4
LT		 1080 snd_pcm_stream_lock_irqsave(substream, flags);
1081 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1082 snd_pcm_stream_unlock_irqrestore(substream, flags);
1083 return err;
1084}
1085
1086/**
1087 * snd_pcm_suspend_all
df8db936 1088 * @pcm: the PCM instance
1da177e4
LT		 1089 *
1090 * Trigger SUSPEND to all substreams in the given pcm.
1091 * After this call, all streams are changed to SUSPENDED state.
1092 */
877211f5 1093int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1094{
877211f5 1095 struct snd_pcm_substream *substream;
1da177e4
LT		 1096 int stream, err = 0;
1097
603bf524
TI		 1098 if (! pcm)
1099 return 0;
1100
1da177e4 1101 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1102 for (substream = pcm->streams[stream].substream;
1103 substream; substream = substream->next) {
1da177e4
LT		 1104 /* FIXME: the open/close code should lock this as well */
1105 if (substream->runtime == NULL)
1106 continue;
1107 err = snd_pcm_suspend(substream);
1108 if (err < 0 && err != -EBUSY)
1109 return err;
1110 }
1111 }
1112 return 0;
1113}
1114
1115/* resume */
1116
877211f5 1117static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1118{
877211f5 1119 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1120 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1121 return -ENOSYS;
1122 runtime->trigger_master = substream;
1123 return 0;
1124}
1125
877211f5 1126static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1127{
877211f5 1128 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1129 if (runtime->trigger_master != substream)
1130 return 0;
1131 /* DMA not running previously? */
1132 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1133 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1134 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1135 return 0;
1136 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1137}
1138
877211f5 1139static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1140{
1141 if (substream->runtime->trigger_master == substream &&
1142 snd_pcm_running(substream))
1143 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1144}
1145
877211f5 1146static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1147{
877211f5 1148 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1149 snd_pcm_trigger_tstamp(substream);
1150 if (substream->timer)
877211f5
TI		 1151 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1152 &runtime->trigger_tstamp);
1da177e4
LT		 1153 runtime->status->state = runtime->status->suspended_state;
1154 if (runtime->sleep_min)
1155 snd_pcm_tick_prepare(substream);
1156}
1157
1158static struct action_ops snd_pcm_action_resume = {
1159 .pre_action = snd_pcm_pre_resume,
1160 .do_action = snd_pcm_do_resume,
1161 .undo_action = snd_pcm_undo_resume,
1162 .post_action = snd_pcm_post_resume
1163};
1164
877211f5 1165static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1166{
877211f5 1167 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1168 int res;
1169
1170 snd_power_lock(card);
1171 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1172 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1173 snd_power_unlock(card);
1174 return res;
1175}
1176
1177#else
1178
877211f5 1179static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1180{
1181 return -ENOSYS;
1182}
1183
1184#endif /* CONFIG_PM */
1185
1186/*
1187 * xrun ioctl
1188 *
1189 * Change the RUNNING stream(s) to XRUN state.
1190 */
877211f5 1191static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1192{
877211f5
TI		 1193 struct snd_card *card = substream->pcm->card;
1194 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1195 int result;
1196
1197 snd_power_lock(card);
1198 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1199 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1200 if (result < 0)
1201 goto _unlock;
1202 }
1203
1204 snd_pcm_stream_lock_irq(substream);
1205 switch (runtime->status->state) {
1206 case SNDRV_PCM_STATE_XRUN:
1207 result = 0; /* already there */
1208 break;
1209 case SNDRV_PCM_STATE_RUNNING:
1210 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1211 break;
1212 default:
1213 result = -EBADFD;
1214 }
1215 snd_pcm_stream_unlock_irq(substream);
1216 _unlock:
1217 snd_power_unlock(card);
1218 return result;
1219}
1220
1221/*
1222 * reset ioctl
1223 */
877211f5 1224static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1225{
877211f5 1226 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1227 switch (runtime->status->state) {
1228 case SNDRV_PCM_STATE_RUNNING:
1229 case SNDRV_PCM_STATE_PREPARED:
1230 case SNDRV_PCM_STATE_PAUSED:
1231 case SNDRV_PCM_STATE_SUSPENDED:
1232 return 0;
1233 default:
1234 return -EBADFD;
1235 }
1236}
1237
877211f5 1238static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1239{
877211f5 1240 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1241 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1242 if (err < 0)
1243 return err;
1244 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1245 runtime->hw_ptr_base = 0;
877211f5
TI		 1246 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1247 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1248 runtime->silence_start = runtime->status->hw_ptr;
1249 runtime->silence_filled = 0;
1250 return 0;
1251}
1252
877211f5 1253static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1254{
877211f5 1255 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1256 runtime->control->appl_ptr = runtime->status->hw_ptr;
1257 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1258 runtime->silence_size > 0)
1259 snd_pcm_playback_silence(substream, ULONG_MAX);
1260}
1261
1262static struct action_ops snd_pcm_action_reset = {
1263 .pre_action = snd_pcm_pre_reset,
1264 .do_action = snd_pcm_do_reset,
1265 .post_action = snd_pcm_post_reset
1266};
1267
877211f5 1268static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1269{
1270 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1271}
1272
1273/*
1274 * prepare ioctl
1275 */
877211f5 1276static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1277{
877211f5 1278 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1279 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1280 return -EBADFD;
1281 if (snd_pcm_running(substream))
1282 return -EBUSY;
1283 return 0;
1284}
1285
877211f5 1286static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1287{
1288 int err;
1289 err = substream->ops->prepare(substream);
1290 if (err < 0)
1291 return err;
1292 return snd_pcm_do_reset(substream, 0);
1293}
1294
877211f5 1295static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1296{
877211f5 1297 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1298 runtime->control->appl_ptr = runtime->status->hw_ptr;
1299 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1300}
1301
1302static struct action_ops snd_pcm_action_prepare = {
1303 .pre_action = snd_pcm_pre_prepare,
1304 .do_action = snd_pcm_do_prepare,
1305 .post_action = snd_pcm_post_prepare
1306};
1307
1308/**
1309 * snd_pcm_prepare
df8db936
TI		 1310 * @substream: the PCM substream instance
1311 *
1312 * Prepare the PCM substream to be triggerable.
1da177e4 1313 */
877211f5 1314int snd_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 1315{
1316 int res;
877211f5 1317 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1318
1319 snd_power_lock(card);
1320 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1321 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0);
1322 snd_power_unlock(card);
1323 return res;
1324}
1325
1326/*
1327 * drain ioctl
1328 */
1329
877211f5 1330static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1331{
1332 if (substream->ffile->f_flags & O_NONBLOCK)
1333 return -EAGAIN;
1334 substream->runtime->trigger_master = substream;
1335 return 0;
1336}
1337
877211f5 1338static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1339{
877211f5 1340 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1341 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1342 switch (runtime->status->state) {
1343 case SNDRV_PCM_STATE_PREPARED:
1344 /* start playback stream if possible */
1345 if (! snd_pcm_playback_empty(substream)) {
1346 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1347 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1348 }
1349 break;
1350 case SNDRV_PCM_STATE_RUNNING:
1351 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1352 break;
1353 default:
1354 break;
1355 }
1356 } else {
1357 /* stop running stream */
1358 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1359 int state = snd_pcm_capture_avail(runtime) > 0 ?
1360 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1361 snd_pcm_do_stop(substream, state);
1362 snd_pcm_post_stop(substream, state);
1363 }
1364 }
1365 return 0;
1366}
1367
877211f5 1368static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1369{
1370}
1371
1372static struct action_ops snd_pcm_action_drain_init = {
1373 .pre_action = snd_pcm_pre_drain_init,
1374 .do_action = snd_pcm_do_drain_init,
1375 .post_action = snd_pcm_post_drain_init
1376};
1377
1378struct drain_rec {
877211f5 1379 struct snd_pcm_substream *substream;
1da177e4
LT		 1380 wait_queue_t wait;
1381 snd_pcm_uframes_t stop_threshold;
1382};
1383
877211f5 1384static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1385
1386/*
1387 * Drain the stream(s).
1388 * When the substream is linked, sync until the draining of all playback streams
1389 * is finished.
1390 * After this call, all streams are supposed to be either SETUP or DRAINING
1391 * (capture only) state.
1392 */
877211f5 1393static int snd_pcm_drain(struct snd_pcm_substream *substream)
1da177e4 1394{
877211f5
TI		 1395 struct snd_card *card;
1396 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1397 struct list_head *pos;
1398 int result = 0;
1399 int i, num_drecs;
1400 struct drain_rec *drec, drec_tmp, *d;
1401
1402 snd_assert(substream != NULL, return -ENXIO);
1403 card = substream->pcm->card;
1404 runtime = substream->runtime;
1405
1406 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1407 return -EBADFD;
1408
1da177e4
LT		 1409 snd_power_lock(card);
1410 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1411 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
21cb2a2e
TI		 1412 if (result < 0) {
1413 snd_power_unlock(card);
1414 return result;
1415 }
1da177e4
LT		 1416 }
1417
1418 /* allocate temporary record for drain sync */
21cb2a2e 1419 down_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1420 if (snd_pcm_stream_linked(substream)) {
1421 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1422 if (! drec) {
21cb2a2e
TI		 1423 up_read(&snd_pcm_link_rwsem);
1424 snd_power_unlock(card);
1425 return -ENOMEM;
1da177e4
LT		 1426 }
1427 } else
1428 drec = &drec_tmp;
1429
21cb2a2e 1430 /* count only playback streams */
1da177e4
LT		 1431 num_drecs = 0;
1432 snd_pcm_group_for_each(pos, substream) {
877211f5 1433 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1da177e4 1434 runtime = s->runtime;
1da177e4
LT		 1435 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1436 d = &drec[num_drecs++];
1437 d->substream = s;
1438 init_waitqueue_entry(&d->wait, current);
1439 add_wait_queue(&runtime->sleep, &d->wait);
1440 /* stop_threshold fixup to avoid endless loop when
1441 * stop_threshold > buffer_size
1442 */
1443 d->stop_threshold = runtime->stop_threshold;
1444 if (runtime->stop_threshold > runtime->buffer_size)
1445 runtime->stop_threshold = runtime->buffer_size;
1446 }
1447 }
21cb2a2e 1448 up_read(&snd_pcm_link_rwsem);
1da177e4 1449 if (! num_drecs)
21cb2a2e
TI		 1450 goto _error;
1451
1452 snd_pcm_stream_lock_irq(substream);
1453 /* resume pause */
1454 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1455 snd_pcm_pause(substream, 0);
1456
1457 /* pre-start/stop - all running streams are changed to DRAINING state */
1458 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1459 if (result < 0) {
1460 snd_pcm_stream_unlock_irq(substream);
1461 goto _error;
1462 }
1da177e4
LT		 1463
1464 for (;;) {
1465 long tout;
1466 if (signal_pending(current)) {
1467 result = -ERESTARTSYS;
1468 break;
1469 }
21cb2a2e
TI		 1470 /* all finished? */
1471 for (i = 0; i < num_drecs; i++) {
1472 runtime = drec[i].substream->runtime;
1473 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1474 break;
1475 }
1476 if (i == num_drecs)
1477 break; /* yes, all drained */
1478
1da177e4
LT		 1479 set_current_state(TASK_INTERRUPTIBLE);
1480 snd_pcm_stream_unlock_irq(substream);
1481 snd_power_unlock(card);
1482 tout = schedule_timeout(10 * HZ);
1483 snd_power_lock(card);
1484 snd_pcm_stream_lock_irq(substream);
1485 if (tout == 0) {
1486 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1487 result = -ESTRPIPE;
1488 else {
1489 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1490 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1491 result = -EIO;
1492 }
1493 break;
1494 }
1da177e4 1495 }
21cb2a2e
TI		 1496
1497 snd_pcm_stream_unlock_irq(substream);
1498
1499 _error:
1da177e4
LT		 1500 for (i = 0; i < num_drecs; i++) {
1501 d = &drec[i];
1502 runtime = d->substream->runtime;
1503 remove_wait_queue(&runtime->sleep, &d->wait);
1504 runtime->stop_threshold = d->stop_threshold;
1505 }
1506
1da177e4
LT		 1507 if (drec != &drec_tmp)
1508 kfree(drec);
1da177e4 1509 snd_power_unlock(card);
1da177e4
LT		 1510
1511 return result;
1512}
1513
1514/*
1515 * drop ioctl
1516 *
1517 * Immediately put all linked substreams into SETUP state.
1518 */
877211f5 1519static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1520{
877211f5
TI		 1521 struct snd_pcm_runtime *runtime;
1522 struct snd_card *card;
1da177e4
LT		 1523 int result = 0;
1524
1525 snd_assert(substream != NULL, return -ENXIO);
1526 runtime = substream->runtime;
1527 card = substream->pcm->card;
1528
1529 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1530 return -EBADFD;
1531
1532 snd_power_lock(card);
1533 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1534 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1535 if (result < 0)
1536 goto _unlock;
1537 }
1538
1539 snd_pcm_stream_lock_irq(substream);
1540 /* resume pause */
1541 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1542 snd_pcm_pause(substream, 0);
1543
1544 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1545 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1546 snd_pcm_stream_unlock_irq(substream);
1547 _unlock:
1548 snd_power_unlock(card);
1549 return result;
1550}
1551
1552
1553/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1554static struct file *snd_pcm_file_fd(int fd)
1555{
1556 struct file *file;
1557 struct inode *inode;
f87135f5
CL		 1558 unsigned int minor;
1559
1da177e4
LT		 1560 file = fget(fd);
1561 if (!file)
1562 return NULL;
1563 inode = file->f_dentry->d_inode;
1564 if (!S_ISCHR(inode->i_mode) ||
1565 imajor(inode) != snd_major) {
1566 fput(file);
1567 return NULL;
1568 }
1569 minor = iminor(inode);
f87135f5
CL		 1570 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1571 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1572 fput(file);
1573 return NULL;
1574 }
1575 return file;
1576}
1577
1578/*
1579 * PCM link handling
1580 */
877211f5 1581static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1582{
1583 int res = 0;
1584 struct file *file;
877211f5
TI		 1585 struct snd_pcm_file *pcm_file;
1586 struct snd_pcm_substream *substream1;
1da177e4
LT		 1587
1588 file = snd_pcm_file_fd(fd);
1589 if (!file)
1590 return -EBADFD;
1591 pcm_file = file->private_data;
1592 substream1 = pcm_file->substream;
1593 down_write(&snd_pcm_link_rwsem);
1594 write_lock_irq(&snd_pcm_link_rwlock);
1595 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1596 substream->runtime->status->state != substream1->runtime->status->state) {
1597 res = -EBADFD;
1598 goto _end;
1599 }
1600 if (snd_pcm_stream_linked(substream1)) {
1601 res = -EALREADY;
1602 goto _end;
1603 }
1604 if (!snd_pcm_stream_linked(substream)) {
877211f5 1605 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1da177e4
LT		 1606 if (substream->group == NULL) {
1607 res = -ENOMEM;
1608 goto _end;
1609 }
1610 spin_lock_init(&substream->group->lock);
1611 INIT_LIST_HEAD(&substream->group->substreams);
1612 list_add_tail(&substream->link_list, &substream->group->substreams);
1613 substream->group->count = 1;
1614 }
1615 list_add_tail(&substream1->link_list, &substream->group->substreams);
1616 substream->group->count++;
1617 substream1->group = substream->group;
1618 _end:
1619 write_unlock_irq(&snd_pcm_link_rwlock);
1620 up_write(&snd_pcm_link_rwsem);
1621 fput(file);
1622 return res;
1623}
1624
877211f5 1625static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1626{
1627 substream->group = &substream->self_group;
1628 INIT_LIST_HEAD(&substream->self_group.substreams);
1629 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1630}
1631
877211f5 1632static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4
LT		 1633{
1634 struct list_head *pos;
1635 int res = 0;
1636
1637 down_write(&snd_pcm_link_rwsem);
1638 write_lock_irq(&snd_pcm_link_rwlock);
1639 if (!snd_pcm_stream_linked(substream)) {
1640 res = -EALREADY;
1641 goto _end;
1642 }
1643 list_del(&substream->link_list);
1644 substream->group->count--;
1645 if (substream->group->count == 1) { /* detach the last stream, too */
1646 snd_pcm_group_for_each(pos, substream) {
1647 relink_to_local(snd_pcm_group_substream_entry(pos));
1648 break;
1649 }
1650 kfree(substream->group);
1651 }
1652 relink_to_local(substream);
1653 _end:
1654 write_unlock_irq(&snd_pcm_link_rwlock);
1655 up_write(&snd_pcm_link_rwsem);
1656 return res;
1657}
1658
1659/*
1660 * hw configurator
1661 */
877211f5
TI		 1662static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1663 struct snd_pcm_hw_rule *rule)
1da177e4 1664{
877211f5 1665 struct snd_interval t;
1da177e4
LT		 1666 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1667 hw_param_interval_c(params, rule->deps[1]), &t);
1668 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1669}
1670
877211f5
TI		 1671static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1672 struct snd_pcm_hw_rule *rule)
1da177e4 1673{
877211f5 1674 struct snd_interval t;
1da177e4
LT		 1675 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1676 hw_param_interval_c(params, rule->deps[1]), &t);
1677 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1678}
1679
877211f5
TI		 1680static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1681 struct snd_pcm_hw_rule *rule)
1da177e4 1682{
877211f5 1683 struct snd_interval t;
1da177e4
LT		 1684 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1685 hw_param_interval_c(params, rule->deps[1]),
1686 (unsigned long) rule->private, &t);
1687 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1688}
1689
877211f5
TI		 1690static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1691 struct snd_pcm_hw_rule *rule)
1da177e4 1692{
877211f5 1693 struct snd_interval t;
1da177e4
LT		 1694 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1695 (unsigned long) rule->private,
1696 hw_param_interval_c(params, rule->deps[1]), &t);
1697 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1698}
1699
877211f5
TI		 1700static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1701 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1702{
1703 unsigned int k;
877211f5
TI		 1704 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1705 struct snd_mask m;
1706 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1707 snd_mask_any(&m);
1708 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1709 int bits;
1710 if (! snd_mask_test(mask, k))
1711 continue;
1712 bits = snd_pcm_format_physical_width(k);
1713 if (bits <= 0)
1714 continue; /* ignore invalid formats */
1715 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1716 snd_mask_reset(&m, k);
1717 }
1718 return snd_mask_refine(mask, &m);
1719}
1720
877211f5
TI		 1721static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1722 struct snd_pcm_hw_rule *rule)
1da177e4 1723{
877211f5 1724 struct snd_interval t;
1da177e4
LT		 1725 unsigned int k;
1726 t.min = UINT_MAX;
1727 t.max = 0;
1728 t.openmin = 0;
1729 t.openmax = 0;
1730 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1731 int bits;
1732 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1733 continue;
1734 bits = snd_pcm_format_physical_width(k);
1735 if (bits <= 0)
1736 continue; /* ignore invalid formats */
1737 if (t.min > (unsigned)bits)
1738 t.min = bits;
1739 if (t.max < (unsigned)bits)
1740 t.max = bits;
1741 }
1742 t.integer = 1;
1743 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1744}
1745
1746#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1747#error "Change this table"
1748#endif
1749
1750static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1751 48000, 64000, 88200, 96000, 176400, 192000 };
1752
877211f5
TI		 1753static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1754 struct snd_pcm_hw_rule *rule)
1da177e4 1755{
877211f5 1756 struct snd_pcm_hardware *hw = rule->private;
1da177e4
LT		 1757 return snd_interval_list(hw_param_interval(params, rule->var),
1758 ARRAY_SIZE(rates), rates, hw->rates);
1759}
1760
877211f5
TI		 1761static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1762 struct snd_pcm_hw_rule *rule)
1da177e4 1763{
877211f5
TI		 1764 struct snd_interval t;
1765 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1766 t.min = 0;
1767 t.max = substream->buffer_bytes_max;
1768 t.openmin = 0;
1769 t.openmax = 0;
1770 t.integer = 1;
1771 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1772}
1773
877211f5 1774int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1775{
877211f5
TI		 1776 struct snd_pcm_runtime *runtime = substream->runtime;
1777 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1778 int k, err;
1779
1780 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1781 snd_mask_any(constrs_mask(constrs, k));
1782 }
1783
1784 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1785 snd_interval_any(constrs_interval(constrs, k));
1786 }
1787
1788 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1789 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1790 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1791 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1792 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1793
1794 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1795 snd_pcm_hw_rule_format, NULL,
1796 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1797 if (err < 0)
1798 return err;
1799 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1800 snd_pcm_hw_rule_sample_bits, NULL,
1801 SNDRV_PCM_HW_PARAM_FORMAT,
1802 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1803 if (err < 0)
1804 return err;
1805 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1806 snd_pcm_hw_rule_div, NULL,
1807 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1808 if (err < 0)
1809 return err;
1810 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1811 snd_pcm_hw_rule_mul, NULL,
1812 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1813 if (err < 0)
1814 return err;
1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1816 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1817 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1818 if (err < 0)
1819 return err;
1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1821 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1822 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1823 if (err < 0)
1824 return err;
1825 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1826 snd_pcm_hw_rule_div, NULL,
1827 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1828 if (err < 0)
1829 return err;
1830 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1831 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1832 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1833 if (err < 0)
1834 return err;
1835 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1836 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1837 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1838 if (err < 0)
1839 return err;
1840 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1841 snd_pcm_hw_rule_div, NULL,
1842 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1843 if (err < 0)
1844 return err;
1845 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1846 snd_pcm_hw_rule_div, NULL,
1847 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1848 if (err < 0)
1849 return err;
1850 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1851 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1852 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1853 if (err < 0)
1854 return err;
1855 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1856 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1857 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1858 if (err < 0)
1859 return err;
1860 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1861 snd_pcm_hw_rule_mul, NULL,
1862 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1863 if (err < 0)
1864 return err;
1865 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1866 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1867 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1868 if (err < 0)
1869 return err;
1870 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1871 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1872 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1873 if (err < 0)
1874 return err;
1875 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1876 snd_pcm_hw_rule_muldivk, (void*) 8,
1877 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1878 if (err < 0)
1879 return err;
1880 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1881 snd_pcm_hw_rule_muldivk, (void*) 8,
1882 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1883 if (err < 0)
1884 return err;
1885 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1886 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1887 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1888 if (err < 0)
1889 return err;
1890 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1891 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1892 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1893 if (err < 0)
1894 return err;
1895 return 0;
1896}
1897
877211f5 1898int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1899{
877211f5
TI		 1900 struct snd_pcm_runtime *runtime = substream->runtime;
1901 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1902 int err;
1903 unsigned int mask = 0;
1904
1905 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1906 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1907 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1908 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1909 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1910 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1911 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1912 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1913 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1914 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1915 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1916 }
1917 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1918 snd_assert(err >= 0, return -EINVAL);
1919
1920 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1921 snd_assert(err >= 0, return -EINVAL);
1922
1923 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1924 snd_assert(err >= 0, return -EINVAL);
1925
1926 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1927 hw->channels_min, hw->channels_max);
1928 snd_assert(err >= 0, return -EINVAL);
1929
1930 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1931 hw->rate_min, hw->rate_max);
1932 snd_assert(err >= 0, return -EINVAL);
1933
1934 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1935 hw->period_bytes_min, hw->period_bytes_max);
1936 snd_assert(err >= 0, return -EINVAL);
1937
1938 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1939 hw->periods_min, hw->periods_max);
1940 snd_assert(err >= 0, return -EINVAL);
1941
1942 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1943 hw->period_bytes_min, hw->buffer_bytes_max);
1944 snd_assert(err >= 0, return -EINVAL);
1945
1946 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1947 snd_pcm_hw_rule_buffer_bytes_max, substream,
1948 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1949 if (err < 0)
1950 return err;
1951
1952 /* FIXME: remove */
1953 if (runtime->dma_bytes) {
1954 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1955 snd_assert(err >= 0, return -EINVAL);
1956 }
1957
1958 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1959 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1960 snd_pcm_hw_rule_rate, hw,
1961 SNDRV_PCM_HW_PARAM_RATE, -1);
1962 if (err < 0)
1963 return err;
1964 }
1965
1966 /* FIXME: this belong to lowlevel */
1967 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1968 1000000 / HZ, 1000000 / HZ);
1969 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1970
1971 return 0;
1972}
1973
877211f5
TI		 1974static void snd_pcm_add_file(struct snd_pcm_str *str,
1975 struct snd_pcm_file *pcm_file)
1da177e4
LT		 1976{
1977 pcm_file->next = str->files;
1978 str->files = pcm_file;
1979}
1980
877211f5
TI		 1981static void snd_pcm_remove_file(struct snd_pcm_str *str,
1982 struct snd_pcm_file *pcm_file)
1da177e4 1983{
877211f5 1984 struct snd_pcm_file * pcm_file1;
1da177e4
LT		 1985 if (str->files == pcm_file) {
1986 str->files = pcm_file->next;
1987 } else {
1988 pcm_file1 = str->files;
1989 while (pcm_file1 && pcm_file1->next != pcm_file)
1990 pcm_file1 = pcm_file1->next;
1991 if (pcm_file1 != NULL)
1992 pcm_file1->next = pcm_file->next;
1993 }
1994}
1995
877211f5 1996static int snd_pcm_release_file(struct snd_pcm_file * pcm_file)
1da177e4 1997{
877211f5
TI		 1998 struct snd_pcm_substream *substream;
1999 struct snd_pcm_runtime *runtime;
2000 struct snd_pcm_str * str;
1da177e4
LT		 2001
2002 snd_assert(pcm_file != NULL, return -ENXIO);
2003 substream = pcm_file->substream;
2004 snd_assert(substream != NULL, return -ENXIO);
2005 runtime = substream->runtime;
2006 str = substream->pstr;
2007 snd_pcm_unlink(substream);
443feb88 2008 if (substream->ffile != NULL) {
1da177e4
LT		 2009 if (substream->ops->hw_free != NULL)
2010 substream->ops->hw_free(substream);
2011 substream->ops->close(substream);
443feb88 2012 substream->ffile = NULL;
1da177e4 2013 }
1da177e4
LT		 2014 snd_pcm_remove_file(str, pcm_file);
2015 snd_pcm_release_substream(substream);
2016 kfree(pcm_file);
2017 return 0;
2018}
2019
2020static int snd_pcm_open_file(struct file *file,
877211f5 2021 struct snd_pcm *pcm,
1da177e4 2022 int stream,
877211f5 2023 struct snd_pcm_file **rpcm_file)
1da177e4
LT		 2024{
2025 int err = 0;
877211f5
TI		 2026 struct snd_pcm_file *pcm_file;
2027 struct snd_pcm_substream *substream;
2028 struct snd_pcm_str *str;
1da177e4
LT		 2029
2030 snd_assert(rpcm_file != NULL, return -EINVAL);
2031 *rpcm_file = NULL;
2032
ca2c0966 2033 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
1da177e4
LT		 2034 if (pcm_file == NULL) {
2035 return -ENOMEM;
2036 }
2037
2038 if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) {
2039 kfree(pcm_file);
2040 return err;
2041 }
2042
2043 str = substream->pstr;
2044 substream->file = pcm_file;
2045 substream->no_mmap_ctrl = 0;
2046
2047 pcm_file->substream = substream;
2048
2049 snd_pcm_add_file(str, pcm_file);
2050
2051 err = snd_pcm_hw_constraints_init(substream);
2052 if (err < 0) {
2053 snd_printd("snd_pcm_hw_constraints_init failed\n");
2054 snd_pcm_release_file(pcm_file);
2055 return err;
2056 }
2057
2058 if ((err = substream->ops->open(substream)) < 0) {
2059 snd_pcm_release_file(pcm_file);
2060 return err;
2061 }
443feb88 2062 substream->ffile = file;
1da177e4
LT		 2063
2064 err = snd_pcm_hw_constraints_complete(substream);
2065 if (err < 0) {
2066 snd_printd("snd_pcm_hw_constraints_complete failed\n");
1da177e4
LT		 2067 snd_pcm_release_file(pcm_file);
2068 return err;
2069 }
2070
1da177e4
LT		 2071 file->private_data = pcm_file;
2072 *rpcm_file = pcm_file;
2073 return 0;
2074}
2075
f87135f5
CL		 2076static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2077{
2078 struct snd_pcm *pcm;
2079
2080 pcm = snd_lookup_minor_data(iminor(inode),
2081 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2082 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2083}
2084
2085static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2086{
877211f5 2087 struct snd_pcm *pcm;
f87135f5
CL		 2088
2089 pcm = snd_lookup_minor_data(iminor(inode),
2090 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2091 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2092}
2093
2094static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2095{
2096 int err;
877211f5 2097 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2098 wait_queue_t wait;
2099
1da177e4
LT		 2100 if (pcm == NULL) {
2101 err = -ENODEV;
2102 goto __error1;
2103 }
2104 err = snd_card_file_add(pcm->card, file);
2105 if (err < 0)
2106 goto __error1;
2107 if (!try_module_get(pcm->card->module)) {
2108 err = -EFAULT;
2109 goto __error2;
2110 }
2111 init_waitqueue_entry(&wait, current);
2112 add_wait_queue(&pcm->open_wait, &wait);
2113 down(&pcm->open_mutex);
2114 while (1) {
f87135f5 2115 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
1da177e4
LT		 2116 if (err >= 0)
2117 break;
2118 if (err == -EAGAIN) {
2119 if (file->f_flags & O_NONBLOCK) {
2120 err = -EBUSY;
2121 break;
2122 }
2123 } else
2124 break;
2125 set_current_state(TASK_INTERRUPTIBLE);
2126 up(&pcm->open_mutex);
2127 schedule();
2128 down(&pcm->open_mutex);
2129 if (signal_pending(current)) {
2130 err = -ERESTARTSYS;
2131 break;
2132 }
2133 }
2134 remove_wait_queue(&pcm->open_wait, &wait);
2135 up(&pcm->open_mutex);
2136 if (err < 0)
2137 goto __error;
2138 return err;
2139
2140 __error:
2141 module_put(pcm->card->module);
2142 __error2:
2143 snd_card_file_remove(pcm->card, file);
2144 __error1:
2145 return err;
2146}
2147
2148static int snd_pcm_release(struct inode *inode, struct file *file)
2149{
877211f5
TI		 2150 struct snd_pcm *pcm;
2151 struct snd_pcm_substream *substream;
2152 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2153
2154 pcm_file = file->private_data;
2155 substream = pcm_file->substream;
2156 snd_assert(substream != NULL, return -ENXIO);
2157 snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2158 pcm = substream->pcm;
2159 snd_pcm_drop(substream);
2160 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2161 down(&pcm->open_mutex);
2162 snd_pcm_release_file(pcm_file);
2163 up(&pcm->open_mutex);
2164 wake_up(&pcm->open_wait);
2165 module_put(pcm->card->module);
2166 snd_card_file_remove(pcm->card, file);
2167 return 0;
2168}
2169
877211f5
TI		 2170static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2171 snd_pcm_uframes_t frames)
1da177e4 2172{
877211f5 2173 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2174 snd_pcm_sframes_t appl_ptr;
2175 snd_pcm_sframes_t ret;
2176 snd_pcm_sframes_t hw_avail;
2177
2178 if (frames == 0)
2179 return 0;
2180
2181 snd_pcm_stream_lock_irq(substream);
2182 switch (runtime->status->state) {
2183 case SNDRV_PCM_STATE_PREPARED:
2184 break;
2185 case SNDRV_PCM_STATE_DRAINING:
2186 case SNDRV_PCM_STATE_RUNNING:
2187 if (snd_pcm_update_hw_ptr(substream) >= 0)
2188 break;
2189 /* Fall through */
2190 case SNDRV_PCM_STATE_XRUN:
2191 ret = -EPIPE;
2192 goto __end;
2193 default:
2194 ret = -EBADFD;
2195 goto __end;
2196 }
2197
2198 hw_avail = snd_pcm_playback_hw_avail(runtime);
2199 if (hw_avail <= 0) {
2200 ret = 0;
2201 goto __end;
2202 }
2203 if (frames > (snd_pcm_uframes_t)hw_avail)
2204 frames = hw_avail;
2205 else
2206 frames -= frames % runtime->xfer_align;
2207 appl_ptr = runtime->control->appl_ptr - frames;
2208 if (appl_ptr < 0)
2209 appl_ptr += runtime->boundary;
2210 runtime->control->appl_ptr = appl_ptr;
2211 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2212 runtime->sleep_min)
2213 snd_pcm_tick_prepare(substream);
2214 ret = frames;
2215 __end:
2216 snd_pcm_stream_unlock_irq(substream);
2217 return ret;
2218}
2219
877211f5
TI		 2220static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2221 snd_pcm_uframes_t frames)
1da177e4 2222{
877211f5 2223 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2224 snd_pcm_sframes_t appl_ptr;
2225 snd_pcm_sframes_t ret;
2226 snd_pcm_sframes_t hw_avail;
2227
2228 if (frames == 0)
2229 return 0;
2230
2231 snd_pcm_stream_lock_irq(substream);
2232 switch (runtime->status->state) {
2233 case SNDRV_PCM_STATE_PREPARED:
2234 case SNDRV_PCM_STATE_DRAINING:
2235 break;
2236 case SNDRV_PCM_STATE_RUNNING:
2237 if (snd_pcm_update_hw_ptr(substream) >= 0)
2238 break;
2239 /* Fall through */
2240 case SNDRV_PCM_STATE_XRUN:
2241 ret = -EPIPE;
2242 goto __end;
2243 default:
2244 ret = -EBADFD;
2245 goto __end;
2246 }
2247
2248 hw_avail = snd_pcm_capture_hw_avail(runtime);
2249 if (hw_avail <= 0) {
2250 ret = 0;
2251 goto __end;
2252 }
2253 if (frames > (snd_pcm_uframes_t)hw_avail)
2254 frames = hw_avail;
2255 else
2256 frames -= frames % runtime->xfer_align;
2257 appl_ptr = runtime->control->appl_ptr - frames;
2258 if (appl_ptr < 0)
2259 appl_ptr += runtime->boundary;
2260 runtime->control->appl_ptr = appl_ptr;
2261 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2262 runtime->sleep_min)
2263 snd_pcm_tick_prepare(substream);
2264 ret = frames;
2265 __end:
2266 snd_pcm_stream_unlock_irq(substream);
2267 return ret;
2268}
2269
877211f5
TI		 2270static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2271 snd_pcm_uframes_t frames)
1da177e4 2272{
877211f5 2273 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2274 snd_pcm_sframes_t appl_ptr;
2275 snd_pcm_sframes_t ret;
2276 snd_pcm_sframes_t avail;
2277
2278 if (frames == 0)
2279 return 0;
2280
2281 snd_pcm_stream_lock_irq(substream);
2282 switch (runtime->status->state) {
2283 case SNDRV_PCM_STATE_PREPARED:
2284 case SNDRV_PCM_STATE_PAUSED:
2285 break;
2286 case SNDRV_PCM_STATE_DRAINING:
2287 case SNDRV_PCM_STATE_RUNNING:
2288 if (snd_pcm_update_hw_ptr(substream) >= 0)
2289 break;
2290 /* Fall through */
2291 case SNDRV_PCM_STATE_XRUN:
2292 ret = -EPIPE;
2293 goto __end;
2294 default:
2295 ret = -EBADFD;
2296 goto __end;
2297 }
2298
2299 avail = snd_pcm_playback_avail(runtime);
2300 if (avail <= 0) {
2301 ret = 0;
2302 goto __end;
2303 }
2304 if (frames > (snd_pcm_uframes_t)avail)
2305 frames = avail;
2306 else
2307 frames -= frames % runtime->xfer_align;
2308 appl_ptr = runtime->control->appl_ptr + frames;
2309 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2310 appl_ptr -= runtime->boundary;
2311 runtime->control->appl_ptr = appl_ptr;
2312 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2313 runtime->sleep_min)
2314 snd_pcm_tick_prepare(substream);
2315 ret = frames;
2316 __end:
2317 snd_pcm_stream_unlock_irq(substream);
2318 return ret;
2319}
2320
877211f5
TI		 2321static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2322 snd_pcm_uframes_t frames)
1da177e4 2323{
877211f5 2324 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2325 snd_pcm_sframes_t appl_ptr;
2326 snd_pcm_sframes_t ret;
2327 snd_pcm_sframes_t avail;
2328
2329 if (frames == 0)
2330 return 0;
2331
2332 snd_pcm_stream_lock_irq(substream);
2333 switch (runtime->status->state) {
2334 case SNDRV_PCM_STATE_PREPARED:
2335 case SNDRV_PCM_STATE_DRAINING:
2336 case SNDRV_PCM_STATE_PAUSED:
2337 break;
2338 case SNDRV_PCM_STATE_RUNNING:
2339 if (snd_pcm_update_hw_ptr(substream) >= 0)
2340 break;
2341 /* Fall through */
2342 case SNDRV_PCM_STATE_XRUN:
2343 ret = -EPIPE;
2344 goto __end;
2345 default:
2346 ret = -EBADFD;
2347 goto __end;
2348 }
2349
2350 avail = snd_pcm_capture_avail(runtime);
2351 if (avail <= 0) {
2352 ret = 0;
2353 goto __end;
2354 }
2355 if (frames > (snd_pcm_uframes_t)avail)
2356 frames = avail;
2357 else
2358 frames -= frames % runtime->xfer_align;
2359 appl_ptr = runtime->control->appl_ptr + frames;
2360 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2361 appl_ptr -= runtime->boundary;
2362 runtime->control->appl_ptr = appl_ptr;
2363 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2364 runtime->sleep_min)
2365 snd_pcm_tick_prepare(substream);
2366 ret = frames;
2367 __end:
2368 snd_pcm_stream_unlock_irq(substream);
2369 return ret;
2370}
2371
877211f5 2372static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2373{
877211f5 2374 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2375 int err;
2376
2377 snd_pcm_stream_lock_irq(substream);
2378 switch (runtime->status->state) {
2379 case SNDRV_PCM_STATE_DRAINING:
2380 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2381 goto __badfd;
2382 case SNDRV_PCM_STATE_RUNNING:
2383 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2384 break;
2385 /* Fall through */
2386 case SNDRV_PCM_STATE_PREPARED:
2387 case SNDRV_PCM_STATE_SUSPENDED:
2388 err = 0;
2389 break;
2390 case SNDRV_PCM_STATE_XRUN:
2391 err = -EPIPE;
2392 break;
2393 default:
2394 __badfd:
2395 err = -EBADFD;
2396 break;
2397 }
2398 snd_pcm_stream_unlock_irq(substream);
2399 return err;
2400}
2401
877211f5
TI		 2402static int snd_pcm_delay(struct snd_pcm_substream *substream,
2403 snd_pcm_sframes_t __user *res)
1da177e4 2404{
877211f5 2405 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2406 int err;
2407 snd_pcm_sframes_t n = 0;
2408
2409 snd_pcm_stream_lock_irq(substream);
2410 switch (runtime->status->state) {
2411 case SNDRV_PCM_STATE_DRAINING:
2412 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2413 goto __badfd;
2414 case SNDRV_PCM_STATE_RUNNING:
2415 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2416 break;
2417 /* Fall through */
2418 case SNDRV_PCM_STATE_PREPARED:
2419 case SNDRV_PCM_STATE_SUSPENDED:
2420 err = 0;
2421 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2422 n = snd_pcm_playback_hw_avail(runtime);
2423 else
2424 n = snd_pcm_capture_avail(runtime);
2425 break;
2426 case SNDRV_PCM_STATE_XRUN:
2427 err = -EPIPE;
2428 break;
2429 default:
2430 __badfd:
2431 err = -EBADFD;
2432 break;
2433 }
2434 snd_pcm_stream_unlock_irq(substream);
2435 if (!err)
2436 if (put_user(n, res))
2437 err = -EFAULT;
2438 return err;
2439}
2440
877211f5
TI		 2441static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2442 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2443{
877211f5
TI		 2444 struct snd_pcm_runtime *runtime = substream->runtime;
2445 struct snd_pcm_sync_ptr sync_ptr;
2446 volatile struct snd_pcm_mmap_status *status;
2447 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2448 int err;
2449
2450 memset(&sync_ptr, 0, sizeof(sync_ptr));
2451 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2452 return -EFAULT;
877211f5 2453 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2454 return -EFAULT;
2455 status = runtime->status;
2456 control = runtime->control;
2457 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2458 err = snd_pcm_hwsync(substream);
2459 if (err < 0)
2460 return err;
2461 }
2462 snd_pcm_stream_lock_irq(substream);
2463 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2464 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2465 else
2466 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2467 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2468 control->avail_min = sync_ptr.c.control.avail_min;
2469 else
2470 sync_ptr.c.control.avail_min = control->avail_min;
2471 sync_ptr.s.status.state = status->state;
2472 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2473 sync_ptr.s.status.tstamp = status->tstamp;
2474 sync_ptr.s.status.suspended_state = status->suspended_state;
2475 snd_pcm_stream_unlock_irq(substream);
2476 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2477 return -EFAULT;
2478 return 0;
2479}
2480
877211f5 2481static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream,
1da177e4 2482 unsigned int cmd, void __user *arg);
877211f5 2483static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream,
1da177e4
LT		 2484 unsigned int cmd, void __user *arg);
2485
877211f5 2486static int snd_pcm_common_ioctl1(struct snd_pcm_substream *substream,
1da177e4
LT		 2487 unsigned int cmd, void __user *arg)
2488{
2489 snd_assert(substream != NULL, return -ENXIO);
2490
2491 switch (cmd) {
2492 case SNDRV_PCM_IOCTL_PVERSION:
2493 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2494 case SNDRV_PCM_IOCTL_INFO:
2495 return snd_pcm_info_user(substream, arg);
07799e75 2496 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
1da177e4 2497 return 0;
1da177e4
LT		 2498 case SNDRV_PCM_IOCTL_HW_REFINE:
2499 return snd_pcm_hw_refine_user(substream, arg);
2500 case SNDRV_PCM_IOCTL_HW_PARAMS:
2501 return snd_pcm_hw_params_user(substream, arg);
2502 case SNDRV_PCM_IOCTL_HW_FREE:
2503 return snd_pcm_hw_free(substream);
2504 case SNDRV_PCM_IOCTL_SW_PARAMS:
2505 return snd_pcm_sw_params_user(substream, arg);
2506 case SNDRV_PCM_IOCTL_STATUS:
2507 return snd_pcm_status_user(substream, arg);
2508 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2509 return snd_pcm_channel_info_user(substream, arg);
2510 case SNDRV_PCM_IOCTL_PREPARE:
2511 return snd_pcm_prepare(substream);
2512 case SNDRV_PCM_IOCTL_RESET:
2513 return snd_pcm_reset(substream);
2514 case SNDRV_PCM_IOCTL_START:
2515 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2516 case SNDRV_PCM_IOCTL_LINK:
2517 return snd_pcm_link(substream, (int)(unsigned long) arg);
2518 case SNDRV_PCM_IOCTL_UNLINK:
2519 return snd_pcm_unlink(substream);
2520 case SNDRV_PCM_IOCTL_RESUME:
2521 return snd_pcm_resume(substream);
2522 case SNDRV_PCM_IOCTL_XRUN:
2523 return snd_pcm_xrun(substream);
2524 case SNDRV_PCM_IOCTL_HWSYNC:
2525 return snd_pcm_hwsync(substream);
2526 case SNDRV_PCM_IOCTL_DELAY:
2527 return snd_pcm_delay(substream, arg);
2528 case SNDRV_PCM_IOCTL_SYNC_PTR:
2529 return snd_pcm_sync_ptr(substream, arg);
2530 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2531 return snd_pcm_hw_refine_old_user(substream, arg);
2532 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2533 return snd_pcm_hw_params_old_user(substream, arg);
2534 case SNDRV_PCM_IOCTL_DRAIN:
2535 return snd_pcm_drain(substream);
2536 case SNDRV_PCM_IOCTL_DROP:
2537 return snd_pcm_drop(substream);
2538 }
2539 snd_printd("unknown ioctl = 0x%x\n", cmd);
2540 return -ENOTTY;
2541}
2542
877211f5 2543static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream,
1da177e4
LT		 2544 unsigned int cmd, void __user *arg)
2545{
2546 snd_assert(substream != NULL, return -ENXIO);
2547 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2548 switch (cmd) {
2549 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2550 {
877211f5
TI		 2551 struct snd_xferi xferi;
2552 struct snd_xferi __user *_xferi = arg;
2553 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2554 snd_pcm_sframes_t result;
2555 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2556 return -EBADFD;
2557 if (put_user(0, &_xferi->result))
2558 return -EFAULT;
2559 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2560 return -EFAULT;
2561 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2562 __put_user(result, &_xferi->result);
2563 return result < 0 ? result : 0;
2564 }
2565 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2566 {
877211f5
TI		 2567 struct snd_xfern xfern;
2568 struct snd_xfern __user *_xfern = arg;
2569 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2570 void __user **bufs;
2571 snd_pcm_sframes_t result;
2572 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2573 return -EBADFD;
2574 if (runtime->channels > 128)
2575 return -EINVAL;
2576 if (put_user(0, &_xfern->result))
2577 return -EFAULT;
2578 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2579 return -EFAULT;
2580 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2581 if (bufs == NULL)
2582 return -ENOMEM;
2583 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2584 kfree(bufs);
2585 return -EFAULT;
2586 }
2587 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2588 kfree(bufs);
2589 __put_user(result, &_xfern->result);
2590 return result < 0 ? result : 0;
2591 }
2592 case SNDRV_PCM_IOCTL_REWIND:
2593 {
2594 snd_pcm_uframes_t frames;
2595 snd_pcm_uframes_t __user *_frames = arg;
2596 snd_pcm_sframes_t result;
2597 if (get_user(frames, _frames))
2598 return -EFAULT;
2599 if (put_user(0, _frames))
2600 return -EFAULT;
2601 result = snd_pcm_playback_rewind(substream, frames);
2602 __put_user(result, _frames);
2603 return result < 0 ? result : 0;
2604 }
2605 case SNDRV_PCM_IOCTL_FORWARD:
2606 {
2607 snd_pcm_uframes_t frames;
2608 snd_pcm_uframes_t __user *_frames = arg;
2609 snd_pcm_sframes_t result;
2610 if (get_user(frames, _frames))
2611 return -EFAULT;
2612 if (put_user(0, _frames))
2613 return -EFAULT;
2614 result = snd_pcm_playback_forward(substream, frames);
2615 __put_user(result, _frames);
2616 return result < 0 ? result : 0;
2617 }
2618 case SNDRV_PCM_IOCTL_PAUSE:
2619 {
2620 int res;
2621 snd_pcm_stream_lock_irq(substream);
2622 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2623 snd_pcm_stream_unlock_irq(substream);
2624 return res;
2625 }
2626 }
2627 return snd_pcm_common_ioctl1(substream, cmd, arg);
2628}
2629
877211f5 2630static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream,
1da177e4
LT		 2631 unsigned int cmd, void __user *arg)
2632{
2633 snd_assert(substream != NULL, return -ENXIO);
2634 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2635 switch (cmd) {
2636 case SNDRV_PCM_IOCTL_READI_FRAMES:
2637 {
877211f5
TI		 2638 struct snd_xferi xferi;
2639 struct snd_xferi __user *_xferi = arg;
2640 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2641 snd_pcm_sframes_t result;
2642 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2643 return -EBADFD;
2644 if (put_user(0, &_xferi->result))
2645 return -EFAULT;
2646 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2647 return -EFAULT;
2648 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2649 __put_user(result, &_xferi->result);
2650 return result < 0 ? result : 0;
2651 }
2652 case SNDRV_PCM_IOCTL_READN_FRAMES:
2653 {
877211f5
TI		 2654 struct snd_xfern xfern;
2655 struct snd_xfern __user *_xfern = arg;
2656 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2657 void *bufs;
2658 snd_pcm_sframes_t result;
2659 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2660 return -EBADFD;
2661 if (runtime->channels > 128)
2662 return -EINVAL;
2663 if (put_user(0, &_xfern->result))
2664 return -EFAULT;
2665 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2666 return -EFAULT;
2667 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2668 if (bufs == NULL)
2669 return -ENOMEM;
2670 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2671 kfree(bufs);
2672 return -EFAULT;
2673 }
2674 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2675 kfree(bufs);
2676 __put_user(result, &_xfern->result);
2677 return result < 0 ? result : 0;
2678 }
2679 case SNDRV_PCM_IOCTL_REWIND:
2680 {
2681 snd_pcm_uframes_t frames;
2682 snd_pcm_uframes_t __user *_frames = arg;
2683 snd_pcm_sframes_t result;
2684 if (get_user(frames, _frames))
2685 return -EFAULT;
2686 if (put_user(0, _frames))
2687 return -EFAULT;
2688 result = snd_pcm_capture_rewind(substream, frames);
2689 __put_user(result, _frames);
2690 return result < 0 ? result : 0;
2691 }
2692 case SNDRV_PCM_IOCTL_FORWARD:
2693 {
2694 snd_pcm_uframes_t frames;
2695 snd_pcm_uframes_t __user *_frames = arg;
2696 snd_pcm_sframes_t result;
2697 if (get_user(frames, _frames))
2698 return -EFAULT;
2699 if (put_user(0, _frames))
2700 return -EFAULT;
2701 result = snd_pcm_capture_forward(substream, frames);
2702 __put_user(result, _frames);
2703 return result < 0 ? result : 0;
2704 }
2705 }
2706 return snd_pcm_common_ioctl1(substream, cmd, arg);
2707}
2708
877211f5
TI		 2709static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2710 unsigned long arg)
1da177e4 2711{
877211f5 2712 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2713
2714 pcm_file = file->private_data;
2715
2716 if (((cmd >> 8) & 0xff) != 'A')
2717 return -ENOTTY;
2718
2719 return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2720}
2721
877211f5
TI		 2722static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2723 unsigned long arg)
1da177e4 2724{
877211f5 2725 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2726
2727 pcm_file = file->private_data;
2728
2729 if (((cmd >> 8) & 0xff) != 'A')
2730 return -ENOTTY;
2731
2732 return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2733}
2734
877211f5 2735int snd_pcm_kernel_playback_ioctl(struct snd_pcm_substream *substream,
1da177e4
LT		 2736 unsigned int cmd, void *arg)
2737{
2738 mm_segment_t fs;
2739 int result;
2740
2741 fs = snd_enter_user();
2742 result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg);
2743 snd_leave_user(fs);
2744 return result;
2745}
2746
877211f5 2747int snd_pcm_kernel_capture_ioctl(struct snd_pcm_substream *substream,
1da177e4
LT		 2748 unsigned int cmd, void *arg)
2749{
2750 mm_segment_t fs;
2751 int result;
2752
2753 fs = snd_enter_user();
2754 result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg);
2755 snd_leave_user(fs);
2756 return result;
2757}
2758
877211f5 2759int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
1da177e4
LT		 2760 unsigned int cmd, void *arg)
2761{
2762 switch (substream->stream) {
2763 case SNDRV_PCM_STREAM_PLAYBACK:
2764 return snd_pcm_kernel_playback_ioctl(substream, cmd, arg);
2765 case SNDRV_PCM_STREAM_CAPTURE:
2766 return snd_pcm_kernel_capture_ioctl(substream, cmd, arg);
2767 default:
2768 return -EINVAL;
2769 }
2770}
2771
877211f5
TI		 2772static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2773 loff_t * offset)
1da177e4 2774{
877211f5
TI		 2775 struct snd_pcm_file *pcm_file;
2776 struct snd_pcm_substream *substream;
2777 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2778 snd_pcm_sframes_t result;
2779
2780 pcm_file = file->private_data;
2781 substream = pcm_file->substream;
2782 snd_assert(substream != NULL, return -ENXIO);
2783 runtime = substream->runtime;
2784 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2785 return -EBADFD;
2786 if (!frame_aligned(runtime, count))
2787 return -EINVAL;
2788 count = bytes_to_frames(runtime, count);
2789 result = snd_pcm_lib_read(substream, buf, count);
2790 if (result > 0)
2791 result = frames_to_bytes(runtime, result);
2792 return result;
2793}
2794
877211f5
TI		 2795static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2796 size_t count, loff_t * offset)
1da177e4 2797{
877211f5
TI		 2798 struct snd_pcm_file *pcm_file;
2799 struct snd_pcm_substream *substream;
2800 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2801 snd_pcm_sframes_t result;
2802
2803 pcm_file = file->private_data;
2804 substream = pcm_file->substream;
2805 snd_assert(substream != NULL, result = -ENXIO; goto end);
2806 runtime = substream->runtime;
2807 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2808 result = -EBADFD;
2809 goto end;
2810 }
2811 if (!frame_aligned(runtime, count)) {
2812 result = -EINVAL;
2813 goto end;
2814 }
2815 count = bytes_to_frames(runtime, count);
2816 result = snd_pcm_lib_write(substream, buf, count);
2817 if (result > 0)
2818 result = frames_to_bytes(runtime, result);
2819 end:
2820 return result;
2821}
2822
2823static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2824 unsigned long count, loff_t * offset)
2825
2826{
877211f5
TI		 2827 struct snd_pcm_file *pcm_file;
2828 struct snd_pcm_substream *substream;
2829 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2830 snd_pcm_sframes_t result;
2831 unsigned long i;
2832 void __user **bufs;
2833 snd_pcm_uframes_t frames;
2834
2835 pcm_file = file->private_data;
2836 substream = pcm_file->substream;
2837 snd_assert(substream != NULL, return -ENXIO);
2838 runtime = substream->runtime;
2839 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2840 return -EBADFD;
2841 if (count > 1024 || count != runtime->channels)
2842 return -EINVAL;
2843 if (!frame_aligned(runtime, _vector->iov_len))
2844 return -EINVAL;
2845 frames = bytes_to_samples(runtime, _vector->iov_len);
2846 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2847 if (bufs == NULL)
2848 return -ENOMEM;
2849 for (i = 0; i < count; ++i)
2850 bufs[i] = _vector[i].iov_base;
2851 result = snd_pcm_lib_readv(substream, bufs, frames);
2852 if (result > 0)
2853 result = frames_to_bytes(runtime, result);
2854 kfree(bufs);
2855 return result;
2856}
2857
2858static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2859 unsigned long count, loff_t * offset)
2860{
877211f5
TI		 2861 struct snd_pcm_file *pcm_file;
2862 struct snd_pcm_substream *substream;
2863 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2864 snd_pcm_sframes_t result;
2865 unsigned long i;
2866 void __user **bufs;
2867 snd_pcm_uframes_t frames;
2868
2869 pcm_file = file->private_data;
2870 substream = pcm_file->substream;
2871 snd_assert(substream != NULL, result = -ENXIO; goto end);
2872 runtime = substream->runtime;
2873 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2874 result = -EBADFD;
2875 goto end;
2876 }
2877 if (count > 128 || count != runtime->channels ||
2878 !frame_aligned(runtime, _vector->iov_len)) {
2879 result = -EINVAL;
2880 goto end;
2881 }
2882 frames = bytes_to_samples(runtime, _vector->iov_len);
2883 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2884 if (bufs == NULL)
2885 return -ENOMEM;
2886 for (i = 0; i < count; ++i)
2887 bufs[i] = _vector[i].iov_base;
2888 result = snd_pcm_lib_writev(substream, bufs, frames);
2889 if (result > 0)
2890 result = frames_to_bytes(runtime, result);
2891 kfree(bufs);
2892 end:
2893 return result;
2894}
2895
2896static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2897{
877211f5
TI		 2898 struct snd_pcm_file *pcm_file;
2899 struct snd_pcm_substream *substream;
2900 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2901 unsigned int mask;
2902 snd_pcm_uframes_t avail;
2903
2904 pcm_file = file->private_data;
2905
2906 substream = pcm_file->substream;
2907 snd_assert(substream != NULL, return -ENXIO);
2908 runtime = substream->runtime;
2909
2910 poll_wait(file, &runtime->sleep, wait);
2911
2912 snd_pcm_stream_lock_irq(substream);
2913 avail = snd_pcm_playback_avail(runtime);
2914 switch (runtime->status->state) {
2915 case SNDRV_PCM_STATE_RUNNING:
2916 case SNDRV_PCM_STATE_PREPARED:
2917 case SNDRV_PCM_STATE_PAUSED:
2918 if (avail >= runtime->control->avail_min) {
2919 mask = POLLOUT | POLLWRNORM;
2920 break;
2921 }
2922 /* Fall through */
2923 case SNDRV_PCM_STATE_DRAINING:
2924 mask = 0;
2925 break;
2926 default:
2927 mask = POLLOUT | POLLWRNORM | POLLERR;
2928 break;
2929 }
2930 snd_pcm_stream_unlock_irq(substream);
2931 return mask;
2932}
2933
2934static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2935{
877211f5
TI		 2936 struct snd_pcm_file *pcm_file;
2937 struct snd_pcm_substream *substream;
2938 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2939 unsigned int mask;
2940 snd_pcm_uframes_t avail;
2941
2942 pcm_file = file->private_data;
2943
2944 substream = pcm_file->substream;
2945 snd_assert(substream != NULL, return -ENXIO);
2946 runtime = substream->runtime;
2947
2948 poll_wait(file, &runtime->sleep, wait);
2949
2950 snd_pcm_stream_lock_irq(substream);
2951 avail = snd_pcm_capture_avail(runtime);
2952 switch (runtime->status->state) {
2953 case SNDRV_PCM_STATE_RUNNING:
2954 case SNDRV_PCM_STATE_PREPARED:
2955 case SNDRV_PCM_STATE_PAUSED:
2956 if (avail >= runtime->control->avail_min) {
2957 mask = POLLIN | POLLRDNORM;
2958 break;
2959 }
2960 mask = 0;
2961 break;
2962 case SNDRV_PCM_STATE_DRAINING:
2963 if (avail > 0) {
2964 mask = POLLIN | POLLRDNORM;
2965 break;
2966 }
2967 /* Fall through */
2968 default:
2969 mask = POLLIN | POLLRDNORM | POLLERR;
2970 break;
2971 }
2972 snd_pcm_stream_unlock_irq(substream);
2973 return mask;
2974}
2975
2976/*
2977 * mmap support
2978 */
2979
2980/*
2981 * Only on coherent architectures, we can mmap the status and the control records
2982 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2983 */
2984#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2985/*
2986 * mmap status record
2987 */
877211f5
TI		 2988static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
2989 unsigned long address, int *type)
1da177e4 2990{
877211f5
TI		 2991 struct snd_pcm_substream *substream = area->vm_private_data;
2992 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2993 struct page * page;
2994
2995 if (substream == NULL)
2996 return NOPAGE_OOM;
2997 runtime = substream->runtime;
2998 page = virt_to_page(runtime->status);
b5810039 2999 get_page(page);
1da177e4
LT		 3000 if (type)
3001 *type = VM_FAULT_MINOR;
3002 return page;
3003}
3004
3005static struct vm_operations_struct snd_pcm_vm_ops_status =
3006{
3007 .nopage = snd_pcm_mmap_status_nopage,
3008};
3009
877211f5 3010static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3011 struct vm_area_struct *area)
3012{
877211f5 3013 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3014 long size;
3015 if (!(area->vm_flags & VM_READ))
3016 return -EINVAL;
3017 runtime = substream->runtime;
3018 snd_assert(runtime != NULL, return -EAGAIN);
3019 size = area->vm_end - area->vm_start;
877211f5 3020 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3021 return -EINVAL;
3022 area->vm_ops = &snd_pcm_vm_ops_status;
3023 area->vm_private_data = substream;
3024 area->vm_flags |= VM_RESERVED;
3025 return 0;
3026}
3027
3028/*
3029 * mmap control record
3030 */
877211f5
TI		 3031static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3032 unsigned long address, int *type)
1da177e4 3033{
877211f5
TI		 3034 struct snd_pcm_substream *substream = area->vm_private_data;
3035 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3036 struct page * page;
3037
3038 if (substream == NULL)
3039 return NOPAGE_OOM;
3040 runtime = substream->runtime;
3041 page = virt_to_page(runtime->control);
b5810039 3042 get_page(page);
1da177e4
LT		 3043 if (type)
3044 *type = VM_FAULT_MINOR;
3045 return page;
3046}
3047
3048static struct vm_operations_struct snd_pcm_vm_ops_control =
3049{
3050 .nopage = snd_pcm_mmap_control_nopage,
3051};
3052
877211f5 3053static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3054 struct vm_area_struct *area)
3055{
877211f5 3056 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3057 long size;
3058 if (!(area->vm_flags & VM_READ))
3059 return -EINVAL;
3060 runtime = substream->runtime;
3061 snd_assert(runtime != NULL, return -EAGAIN);
3062 size = area->vm_end - area->vm_start;
877211f5 3063 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3064 return -EINVAL;
3065 area->vm_ops = &snd_pcm_vm_ops_control;
3066 area->vm_private_data = substream;
3067 area->vm_flags |= VM_RESERVED;
3068 return 0;
3069}
3070#else /* ! coherent mmap */
3071/*
3072 * don't support mmap for status and control records.
3073 */
877211f5 3074static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3075 struct vm_area_struct *area)
3076{
3077 return -ENXIO;
3078}
877211f5 3079static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3080 struct vm_area_struct *area)
3081{
3082 return -ENXIO;
3083}
3084#endif /* coherent mmap */
3085
3086/*
3087 * nopage callback for mmapping a RAM page
3088 */
877211f5
TI		 3089static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3090 unsigned long address, int *type)
1da177e4 3091{
877211f5
TI		 3092 struct snd_pcm_substream *substream = area->vm_private_data;
3093 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3094 unsigned long offset;
3095 struct page * page;
3096 void *vaddr;
3097 size_t dma_bytes;
3098
3099 if (substream == NULL)
3100 return NOPAGE_OOM;
3101 runtime = substream->runtime;
3102 offset = area->vm_pgoff << PAGE_SHIFT;
3103 offset += address - area->vm_start;
3104 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3105 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3106 if (offset > dma_bytes - PAGE_SIZE)
3107 return NOPAGE_SIGBUS;
3108 if (substream->ops->page) {
3109 page = substream->ops->page(substream, offset);
3110 if (! page)
3111 return NOPAGE_OOM;
3112 } else {
3113 vaddr = runtime->dma_area + offset;
3114 page = virt_to_page(vaddr);
3115 }
b5810039 3116 get_page(page);
1da177e4
LT		 3117 if (type)
3118 *type = VM_FAULT_MINOR;
3119 return page;
3120}
3121
3122static struct vm_operations_struct snd_pcm_vm_ops_data =
3123{
3124 .open = snd_pcm_mmap_data_open,
3125 .close = snd_pcm_mmap_data_close,
3126 .nopage = snd_pcm_mmap_data_nopage,
3127};
3128
3129/*
3130 * mmap the DMA buffer on RAM
3131 */
877211f5
TI		 3132static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3133 struct vm_area_struct *area)
1da177e4
LT		 3134{
3135 area->vm_ops = &snd_pcm_vm_ops_data;
3136 area->vm_private_data = substream;
3137 area->vm_flags |= VM_RESERVED;
3138 atomic_inc(&substream->runtime->mmap_count);
3139 return 0;
3140}
3141
3142/*
3143 * mmap the DMA buffer on I/O memory area
3144 */
3145#if SNDRV_PCM_INFO_MMAP_IOMEM
3146static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3147{
3148 .open = snd_pcm_mmap_data_open,
3149 .close = snd_pcm_mmap_data_close,
3150};
3151
877211f5
TI		 3152int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3153 struct vm_area_struct *area)
1da177e4
LT		 3154{
3155 long size;
3156 unsigned long offset;
3157
3158#ifdef pgprot_noncached
3159 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3160#endif
3161 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3162 area->vm_private_data = substream;
3163 area->vm_flags |= VM_IO;
3164 size = area->vm_end - area->vm_start;
3165 offset = area->vm_pgoff << PAGE_SHIFT;
3166 if (io_remap_pfn_range(area, area->vm_start,
3167 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3168 size, area->vm_page_prot))
3169 return -EAGAIN;
3170 atomic_inc(&substream->runtime->mmap_count);
3171 return 0;
3172}
3173#endif /* SNDRV_PCM_INFO_MMAP */
3174
3175/*
3176 * mmap DMA buffer
3177 */
877211f5 3178int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3179 struct vm_area_struct *area)
3180{
877211f5 3181 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3182 long size;
3183 unsigned long offset;
3184 size_t dma_bytes;
3185
3186 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3187 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3188 return -EINVAL;
3189 } else {
3190 if (!(area->vm_flags & VM_READ))
3191 return -EINVAL;
3192 }
3193 runtime = substream->runtime;
3194 snd_assert(runtime != NULL, return -EAGAIN);
3195 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3196 return -EBADFD;
3197 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3198 return -ENXIO;
3199 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3200 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3201 return -EINVAL;
3202 size = area->vm_end - area->vm_start;
3203 offset = area->vm_pgoff << PAGE_SHIFT;
3204 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3205 if ((size_t)size > dma_bytes)
3206 return -EINVAL;
3207 if (offset > dma_bytes - size)
3208 return -EINVAL;
3209
3210 if (substream->ops->mmap)
3211 return substream->ops->mmap(substream, area);
3212 else
3213 return snd_pcm_default_mmap(substream, area);
3214}
3215
3216static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3217{
877211f5
TI		 3218 struct snd_pcm_file * pcm_file;
3219 struct snd_pcm_substream *substream;
1da177e4
LT		 3220 unsigned long offset;
3221
3222 pcm_file = file->private_data;
3223 substream = pcm_file->substream;
3224 snd_assert(substream != NULL, return -ENXIO);
3225
3226 offset = area->vm_pgoff << PAGE_SHIFT;
3227 switch (offset) {
3228 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3229 if (substream->no_mmap_ctrl)
3230 return -ENXIO;
3231 return snd_pcm_mmap_status(substream, file, area);
3232 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3233 if (substream->no_mmap_ctrl)
3234 return -ENXIO;
3235 return snd_pcm_mmap_control(substream, file, area);
3236 default:
3237 return snd_pcm_mmap_data(substream, file, area);
3238 }
3239 return 0;
3240}
3241
3242static int snd_pcm_fasync(int fd, struct file * file, int on)
3243{
877211f5
TI		 3244 struct snd_pcm_file * pcm_file;
3245 struct snd_pcm_substream *substream;
3246 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3247 int err;
3248
3249 pcm_file = file->private_data;
3250 substream = pcm_file->substream;
3251 snd_assert(substream != NULL, return -ENXIO);
3252 runtime = substream->runtime;
3253
3254 err = fasync_helper(fd, file, on, &runtime->fasync);
3255 if (err < 0)
3256 return err;
3257 return 0;
3258}
3259
3260/*
3261 * ioctl32 compat
3262 */
3263#ifdef CONFIG_COMPAT
3264#include "pcm_compat.c"
3265#else
3266#define snd_pcm_ioctl_compat NULL
3267#endif
3268
3269/*
3270 * To be removed helpers to keep binary compatibility
3271 */
3272
3273#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3274#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3275
877211f5
TI		 3276static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3277 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3278{
3279 unsigned int i;
3280
3281 memset(params, 0, sizeof(*params));
3282 params->flags = oparams->flags;
3283 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3284 params->masks[i].bits[0] = oparams->masks[i];
3285 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3286 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3287 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3288 params->info = oparams->info;
3289 params->msbits = oparams->msbits;
3290 params->rate_num = oparams->rate_num;
3291 params->rate_den = oparams->rate_den;
3292 params->fifo_size = oparams->fifo_size;
3293}
3294
877211f5
TI		 3295static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3296 struct snd_pcm_hw_params *params)
1da177e4
LT		 3297{
3298 unsigned int i;
3299
3300 memset(oparams, 0, sizeof(*oparams));
3301 oparams->flags = params->flags;
3302 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3303 oparams->masks[i] = params->masks[i].bits[0];
3304 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3305 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3306 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3307 oparams->info = params->info;
3308 oparams->msbits = params->msbits;
3309 oparams->rate_num = params->rate_num;
3310 oparams->rate_den = params->rate_den;
3311 oparams->fifo_size = params->fifo_size;
3312}
3313
877211f5
TI		 3314static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3315 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3316{
877211f5
TI		 3317 struct snd_pcm_hw_params *params;
3318 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3319 int err;
3320
3321 params = kmalloc(sizeof(*params), GFP_KERNEL);
3322 if (!params) {
3323 err = -ENOMEM;
3324 goto out;
3325 }
3326 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3327 if (!oparams) {
3328 err = -ENOMEM;
3329 goto out;
3330 }
3331
3332 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3333 err = -EFAULT;
3334 goto out;
3335 }
3336 snd_pcm_hw_convert_from_old_params(params, oparams);
3337 err = snd_pcm_hw_refine(substream, params);
3338 snd_pcm_hw_convert_to_old_params(oparams, params);
3339 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3340 if (!err)
3341 err = -EFAULT;
3342 }
3343out:
3344 kfree(params);
3345 kfree(oparams);
3346 return err;
3347}
3348
877211f5
TI		 3349static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3350 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3351{
877211f5
TI		 3352 struct snd_pcm_hw_params *params;
3353 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3354 int err;
3355
3356 params = kmalloc(sizeof(*params), GFP_KERNEL);
3357 if (!params) {
3358 err = -ENOMEM;
3359 goto out;
3360 }
3361 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3362 if (!oparams) {
3363 err = -ENOMEM;
3364 goto out;
3365 }
3366 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3367 err = -EFAULT;
3368 goto out;
3369 }
3370 snd_pcm_hw_convert_from_old_params(params, oparams);
3371 err = snd_pcm_hw_params(substream, params);
3372 snd_pcm_hw_convert_to_old_params(oparams, params);
3373 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3374 if (!err)
3375 err = -EFAULT;
3376 }
3377out:
3378 kfree(params);
3379 kfree(oparams);
3380 return err;
3381}
3382
3383/*
3384 * Register section
3385 */
3386
2af677fc 3387struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3388 {
2af677fc
CL		 3389 .owner = THIS_MODULE,
3390 .write = snd_pcm_write,
3391 .writev = snd_pcm_writev,
f87135f5 3392 .open = snd_pcm_playback_open,
2af677fc
CL		 3393 .release = snd_pcm_release,
3394 .poll = snd_pcm_playback_poll,
3395 .unlocked_ioctl = snd_pcm_playback_ioctl,
3396 .compat_ioctl = snd_pcm_ioctl_compat,
3397 .mmap = snd_pcm_mmap,
3398 .fasync = snd_pcm_fasync,
1da177e4
LT		 3399 },
3400 {
2af677fc
CL		 3401 .owner = THIS_MODULE,
3402 .read = snd_pcm_read,
3403 .readv = snd_pcm_readv,
f87135f5 3404 .open = snd_pcm_capture_open,
2af677fc
CL		 3405 .release = snd_pcm_release,
3406 .poll = snd_pcm_capture_poll,
3407 .unlocked_ioctl = snd_pcm_capture_ioctl,
3408 .compat_ioctl = snd_pcm_ioctl_compat,
3409 .mmap = snd_pcm_mmap,
3410 .fasync = snd_pcm_fasync,
1da177e4
LT		 3411 }
3412};
kernel source for telekom puls (alcatel/mediatek)