projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ALSA: off by one bug in snd_riptide_joystick_probe()
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 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
1da177e4 22#include <linux/mm.h>
da155d5b 23#include <linux/module.h>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
26#include <linux/time.h>
e8db0be1 27#include <linux/pm_qos.h>
a27bb332 28#include <linux/aio.h>
6cbbfe1c 29#include <linux/io.h>
657b1989 30#include <linux/dma-mapping.h>
1da177e4
LT		 31#include <sound/core.h>
32#include <sound/control.h>
33#include <sound/info.h>
34#include <sound/pcm.h>
35#include <sound/pcm_params.h>
36#include <sound/timer.h>
37#include <sound/minors.h>
1da177e4
LT		 38
39/*
40 * Compatibility
41 */
42
877211f5 43struct snd_pcm_hw_params_old {
1da177e4
LT		 44 unsigned int flags;
45 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
46 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 47 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
49 unsigned int rmask;
50 unsigned int cmask;
51 unsigned int info;
52 unsigned int msbits;
53 unsigned int rate_num;
54 unsigned int rate_den;
877211f5 55 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 56 unsigned char reserved[64];
57};
58
59d48582 59#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 60#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 62
877211f5
TI		 63static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params_old __user * _oparams);
65static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 67#endif
f87135f5 68static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 69
70/*
71 *
72 */
73
7af142f7
TI		 74static DEFINE_RWLOCK(snd_pcm_link_rwlock);
75static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4 76
30b771cf
TI		 77/**
78 * snd_pcm_stream_lock - Lock the PCM stream
79 * @substream: PCM substream
80 *
81 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
82 * flag of the given substream. This also takes the global link rw lock
83 * (or rw sem), too, for avoiding the race with linked streams.
84 */
7af142f7
TI		 85void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
86{
87 if (substream->pcm->nonatomic) {
88 down_read(&snd_pcm_link_rwsem);
89 mutex_lock(&substream->self_group.mutex);
90 } else {
91 read_lock(&snd_pcm_link_rwlock);
92 spin_lock(&substream->self_group.lock);
93 }
94}
95EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
96
30b771cf
TI		 97/**
98 * snd_pcm_stream_lock - Unlock the PCM stream
99 * @substream: PCM substream
100 *
101 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
102 */
7af142f7
TI		 103void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
104{
105 if (substream->pcm->nonatomic) {
106 mutex_unlock(&substream->self_group.mutex);
107 up_read(&snd_pcm_link_rwsem);
108 } else {
109 spin_unlock(&substream->self_group.lock);
110 read_unlock(&snd_pcm_link_rwlock);
111 }
112}
113EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
114
30b771cf
TI		 115/**
116 * snd_pcm_stream_lock_irq - Lock the PCM stream
117 * @substream: PCM substream
118 *
119 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
120 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
121 * as snd_pcm_stream_lock().
122 */
7af142f7
TI		 123void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
124{
125 if (!substream->pcm->nonatomic)
126 local_irq_disable();
127 snd_pcm_stream_lock(substream);
128}
129EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
130
30b771cf
TI		 131/**
132 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
133 * @substream: PCM substream
134 *
135 * This is a counter-part of snd_pcm_stream_lock_irq().
136 */
7af142f7
TI		 137void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
138{
139 snd_pcm_stream_unlock(substream);
140 if (!substream->pcm->nonatomic)
141 local_irq_enable();
142}
143EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
144
145unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
146{
147 unsigned long flags = 0;
148 if (!substream->pcm->nonatomic)
149 local_irq_save(flags);
150 snd_pcm_stream_lock(substream);
151 return flags;
152}
153EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
154
30b771cf
TI		 155/**
156 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
157 * @substream: PCM substream
158 * @flags: irq flags
159 *
160 * This is a counter-part of snd_pcm_stream_lock_irqsave().
161 */
7af142f7
TI		 162void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
163 unsigned long flags)
164{
165 snd_pcm_stream_unlock(substream);
166 if (!substream->pcm->nonatomic)
167 local_irq_restore(flags);
168}
169EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4
LT		 170
171static inline mm_segment_t snd_enter_user(void)
172{
173 mm_segment_t fs = get_fs();
174 set_fs(get_ds());
175 return fs;
176}
177
178static inline void snd_leave_user(mm_segment_t fs)
179{
180 set_fs(fs);
181}
182
183
184
877211f5 185int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 186{
877211f5
TI		 187 struct snd_pcm_runtime *runtime;
188 struct snd_pcm *pcm = substream->pcm;
189 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 190
1da177e4
LT		 191 memset(info, 0, sizeof(*info));
192 info->card = pcm->card->number;
193 info->device = pcm->device;
194 info->stream = substream->stream;
195 info->subdevice = substream->number;
196 strlcpy(info->id, pcm->id, sizeof(info->id));
197 strlcpy(info->name, pcm->name, sizeof(info->name));
198 info->dev_class = pcm->dev_class;
199 info->dev_subclass = pcm->dev_subclass;
200 info->subdevices_count = pstr->substream_count;
201 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
202 strlcpy(info->subname, substream->name, sizeof(info->subname));
203 runtime = substream->runtime;
204 /* AB: FIXME!!! This is definitely nonsense */
205 if (runtime) {
206 info->sync = runtime->sync;
207 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
208 }
209 return 0;
210}
211
877211f5
TI		 212int snd_pcm_info_user(struct snd_pcm_substream *substream,
213 struct snd_pcm_info __user * _info)
1da177e4 214{
877211f5 215 struct snd_pcm_info *info;
1da177e4
LT		 216 int err;
217
218 info = kmalloc(sizeof(*info), GFP_KERNEL);
219 if (! info)
220 return -ENOMEM;
221 err = snd_pcm_info(substream, info);
222 if (err >= 0) {
223 if (copy_to_user(_info, info, sizeof(*info)))
224 err = -EFAULT;
225 }
226 kfree(info);
227 return err;
228}
229
63825f3a
TI		 230static bool hw_support_mmap(struct snd_pcm_substream *substream)
231{
232 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
233 return false;
234 /* check architectures that return -EINVAL from dma_mmap_coherent() */
235 /* FIXME: this should be some global flag */
236#if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
237 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
238 if (!substream->ops->mmap &&
239 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
240 return false;
241#endif
242 return true;
243}
244
1da177e4
LT		 245#undef RULES_DEBUG
246
247#ifdef RULES_DEBUG
248#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
47023ec7 249static const char * const snd_pcm_hw_param_names[] = {
1da177e4
LT		 250 HW_PARAM(ACCESS),
251 HW_PARAM(FORMAT),
252 HW_PARAM(SUBFORMAT),
253 HW_PARAM(SAMPLE_BITS),
254 HW_PARAM(FRAME_BITS),
255 HW_PARAM(CHANNELS),
256 HW_PARAM(RATE),
257 HW_PARAM(PERIOD_TIME),
258 HW_PARAM(PERIOD_SIZE),
259 HW_PARAM(PERIOD_BYTES),
260 HW_PARAM(PERIODS),
261 HW_PARAM(BUFFER_TIME),
262 HW_PARAM(BUFFER_SIZE),
263 HW_PARAM(BUFFER_BYTES),
264 HW_PARAM(TICK_TIME),
265};
266#endif
267
877211f5
TI		 268int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
269 struct snd_pcm_hw_params *params)
1da177e4
LT		 270{
271 unsigned int k;
877211f5
TI		 272 struct snd_pcm_hardware *hw;
273 struct snd_interval *i = NULL;
274 struct snd_mask *m = NULL;
275 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 276 unsigned int rstamps[constrs->rules_num];
277 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
278 unsigned int stamp = 2;
279 int changed, again;
280
281 params->info = 0;
282 params->fifo_size = 0;
283 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
284 params->msbits = 0;
285 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
286 params->rate_num = 0;
287 params->rate_den = 0;
288 }
289
290 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
291 m = hw_param_mask(params, k);
292 if (snd_mask_empty(m))
293 return -EINVAL;
294 if (!(params->rmask & (1 << k)))
295 continue;
296#ifdef RULES_DEBUG
09e56df8
TI		 297 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
298 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 299#endif
300 changed = snd_mask_refine(m, constrs_mask(constrs, k));
301#ifdef RULES_DEBUG
09e56df8 302 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 303#endif
304 if (changed)
305 params->cmask |= 1 << k;
306 if (changed < 0)
307 return changed;
308 }
309
310 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
311 i = hw_param_interval(params, k);
312 if (snd_interval_empty(i))
313 return -EINVAL;
314 if (!(params->rmask & (1 << k)))
315 continue;
316#ifdef RULES_DEBUG
09e56df8 317 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
1da177e4 318 if (i->empty)
09e56df8 319 pr_cont("empty");
1da177e4 320 else
09e56df8 321 pr_cont("%c%u %u%c",
1da177e4
LT		 322 i->openmin ? '(' : '[', i->min,
323 i->max, i->openmax ? ')' : ']');
09e56df8 324 pr_cont(" -> ");
1da177e4
LT		 325#endif
326 changed = snd_interval_refine(i, constrs_interval(constrs, k));
327#ifdef RULES_DEBUG
328 if (i->empty)
09e56df8 329 pr_cont("empty\n");
1da177e4 330 else
09e56df8 331 pr_cont("%c%u %u%c\n",
1da177e4
LT		 332 i->openmin ? '(' : '[', i->min,
333 i->max, i->openmax ? ')' : ']');
334#endif
335 if (changed)
336 params->cmask |= 1 << k;
337 if (changed < 0)
338 return changed;
339 }
340
341 for (k = 0; k < constrs->rules_num; k++)
342 rstamps[k] = 0;
343 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
344 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
345 do {
346 again = 0;
347 for (k = 0; k < constrs->rules_num; k++) {
877211f5 348 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 349 unsigned int d;
350 int doit = 0;
351 if (r->cond && !(r->cond & params->flags))
352 continue;
353 for (d = 0; r->deps[d] >= 0; d++) {
354 if (vstamps[r->deps[d]] > rstamps[k]) {
355 doit = 1;
356 break;
357 }
358 }
359 if (!doit)
360 continue;
361#ifdef RULES_DEBUG
09e56df8 362 pr_debug("Rule %d [%p]: ", k, r->func);
1da177e4 363 if (r->var >= 0) {
09e56df8 364 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
1da177e4
LT		 365 if (hw_is_mask(r->var)) {
366 m = hw_param_mask(params, r->var);
09e56df8 367 pr_cont("%x", *m->bits);
1da177e4
LT		 368 } else {
369 i = hw_param_interval(params, r->var);
370 if (i->empty)
09e56df8 371 pr_cont("empty");
1da177e4 372 else
09e56df8 373 pr_cont("%c%u %u%c",
1da177e4
LT		 374 i->openmin ? '(' : '[', i->min,
375 i->max, i->openmax ? ')' : ']');
376 }
377 }
378#endif
379 changed = r->func(params, r);
380#ifdef RULES_DEBUG
381 if (r->var >= 0) {
09e56df8 382 pr_cont(" -> ");
1da177e4 383 if (hw_is_mask(r->var))
09e56df8 384 pr_cont("%x", *m->bits);
1da177e4
LT		 385 else {
386 if (i->empty)
09e56df8 387 pr_cont("empty");
1da177e4 388 else
09e56df8 389 pr_cont("%c%u %u%c",
1da177e4
LT		 390 i->openmin ? '(' : '[', i->min,
391 i->max, i->openmax ? ')' : ']');
392 }
393 }
09e56df8 394 pr_cont("\n");
1da177e4
LT		 395#endif
396 rstamps[k] = stamp;
397 if (changed && r->var >= 0) {
398 params->cmask |= (1 << r->var);
399 vstamps[r->var] = stamp;
400 again = 1;
401 }
402 if (changed < 0)
403 return changed;
404 stamp++;
405 }
406 } while (again);
407 if (!params->msbits) {
408 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
409 if (snd_interval_single(i))
410 params->msbits = snd_interval_value(i);
411 }
412
413 if (!params->rate_den) {
414 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
415 if (snd_interval_single(i)) {
416 params->rate_num = snd_interval_value(i);
417 params->rate_den = 1;
418 }
419 }
420
421 hw = &substream->runtime->hw;
63825f3a 422 if (!params->info) {
48d88297
LY		 423 params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
424 SNDRV_PCM_INFO_DRAIN_TRIGGER);
63825f3a
TI		 425 if (!hw_support_mmap(substream))
426 params->info &= ~(SNDRV_PCM_INFO_MMAP |
427 SNDRV_PCM_INFO_MMAP_VALID);
428 }
8bea869c 429 if (!params->fifo_size) {
3be522a9
JK		 430 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
431 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
432 if (snd_mask_min(m) == snd_mask_max(m) &&
433 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 434 changed = substream->ops->ioctl(substream,
435 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 436 if (changed < 0)
8bea869c
JK		 437 return changed;
438 }
439 }
1da177e4
LT		 440 params->rmask = 0;
441 return 0;
442}
443
e88e8ae6
TI		 444EXPORT_SYMBOL(snd_pcm_hw_refine);
445
877211f5
TI		 446static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
447 struct snd_pcm_hw_params __user * _params)
1da177e4 448{
877211f5 449 struct snd_pcm_hw_params *params;
1da177e4
LT		 450 int err;
451
ef44a1ec
LZ		 452 params = memdup_user(_params, sizeof(*params));
453 if (IS_ERR(params))
454 return PTR_ERR(params);
455
1da177e4
LT		 456 err = snd_pcm_hw_refine(substream, params);
457 if (copy_to_user(_params, params, sizeof(*params))) {
458 if (!err)
459 err = -EFAULT;
460 }
ef44a1ec 461
1da177e4
LT		 462 kfree(params);
463 return err;
464}
465
9442e691
TI		 466static int period_to_usecs(struct snd_pcm_runtime *runtime)
467{
468 int usecs;
469
470 if (! runtime->rate)
471 return -1; /* invalid */
472
473 /* take 75% of period time as the deadline */
474 usecs = (750000 / runtime->rate) * runtime->period_size;
475 usecs += ((750000 % runtime->rate) * runtime->period_size) /
476 runtime->rate;
477
478 return usecs;
479}
480
9b0573c0
TI		 481static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
482{
483 snd_pcm_stream_lock_irq(substream);
484 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
485 substream->runtime->status->state = state;
486 snd_pcm_stream_unlock_irq(substream);
487}
488
877211f5
TI		 489static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
490 struct snd_pcm_hw_params *params)
1da177e4 491{
877211f5 492 struct snd_pcm_runtime *runtime;
9442e691 493 int err, usecs;
1da177e4
LT		 494 unsigned int bits;
495 snd_pcm_uframes_t frames;
496
7eaa943c
TI		 497 if (PCM_RUNTIME_CHECK(substream))
498 return -ENXIO;
1da177e4 499 runtime = substream->runtime;
1da177e4
LT		 500 snd_pcm_stream_lock_irq(substream);
501 switch (runtime->status->state) {
502 case SNDRV_PCM_STATE_OPEN:
503 case SNDRV_PCM_STATE_SETUP:
504 case SNDRV_PCM_STATE_PREPARED:
505 break;
506 default:
507 snd_pcm_stream_unlock_irq(substream);
508 return -EBADFD;
509 }
510 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 511#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 512 if (!substream->oss.oss)
513#endif
9c323fcb 514 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 515 return -EBADFD;
516
517 params->rmask = ~0U;
518 err = snd_pcm_hw_refine(substream, params);
519 if (err < 0)
520 goto _error;
521
522 err = snd_pcm_hw_params_choose(substream, params);
523 if (err < 0)
524 goto _error;
525
526 if (substream->ops->hw_params != NULL) {
527 err = substream->ops->hw_params(substream, params);
528 if (err < 0)
529 goto _error;
530 }
531
532 runtime->access = params_access(params);
533 runtime->format = params_format(params);
534 runtime->subformat = params_subformat(params);
535 runtime->channels = params_channels(params);
536 runtime->rate = params_rate(params);
537 runtime->period_size = params_period_size(params);
538 runtime->periods = params_periods(params);
539 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 540 runtime->info = params->info;
541 runtime->rate_num = params->rate_num;
542 runtime->rate_den = params->rate_den;
ab69a490
CL		 543 runtime->no_period_wakeup =
544 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
545 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 546
547 bits = snd_pcm_format_physical_width(runtime->format);
548 runtime->sample_bits = bits;
549 bits *= runtime->channels;
550 runtime->frame_bits = bits;
551 frames = 1;
552 while (bits % 8 != 0) {
553 bits *= 2;
554 frames *= 2;
555 }
556 runtime->byte_align = bits / 8;
557 runtime->min_align = frames;
558
559 /* Default sw params */
560 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
561 runtime->period_step = 1;
1da177e4 562 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 563 runtime->start_threshold = 1;
564 runtime->stop_threshold = runtime->buffer_size;
565 runtime->silence_threshold = 0;
566 runtime->silence_size = 0;
ead4046b
CL		 567 runtime->boundary = runtime->buffer_size;
568 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
569 runtime->boundary *= 2;
1da177e4
LT		 570
571 snd_pcm_timer_resolution_change(substream);
9b0573c0 572 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 573
82f68251
JB		 574 if (pm_qos_request_active(&substream->latency_pm_qos_req))
575 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 576 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 577 pm_qos_add_request(&substream->latency_pm_qos_req,
578 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 579 return 0;
580 _error:
25985edc 581 /* hardware might be unusable from this time,
1da177e4
LT		 582 so we force application to retry to set
583 the correct hardware parameter settings */
9b0573c0 584 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 585 if (substream->ops->hw_free != NULL)
586 substream->ops->hw_free(substream);
587 return err;
588}
589
877211f5
TI		 590static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
591 struct snd_pcm_hw_params __user * _params)
1da177e4 592{
877211f5 593 struct snd_pcm_hw_params *params;
1da177e4
LT		 594 int err;
595
ef44a1ec
LZ		 596 params = memdup_user(_params, sizeof(*params));
597 if (IS_ERR(params))
598 return PTR_ERR(params);
599
1da177e4
LT		 600 err = snd_pcm_hw_params(substream, params);
601 if (copy_to_user(_params, params, sizeof(*params))) {
602 if (!err)
603 err = -EFAULT;
604 }
ef44a1ec 605
1da177e4
LT		 606 kfree(params);
607 return err;
608}
609
877211f5 610static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 611{
877211f5 612 struct snd_pcm_runtime *runtime;
1da177e4
LT		 613 int result = 0;
614
7eaa943c
TI		 615 if (PCM_RUNTIME_CHECK(substream))
616 return -ENXIO;
1da177e4 617 runtime = substream->runtime;
1da177e4
LT		 618 snd_pcm_stream_lock_irq(substream);
619 switch (runtime->status->state) {
620 case SNDRV_PCM_STATE_SETUP:
621 case SNDRV_PCM_STATE_PREPARED:
622 break;
623 default:
624 snd_pcm_stream_unlock_irq(substream);
625 return -EBADFD;
626 }
627 snd_pcm_stream_unlock_irq(substream);
9c323fcb 628 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 629 return -EBADFD;
630 if (substream->ops->hw_free)
631 result = substream->ops->hw_free(substream);
9b0573c0 632 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 633 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 634 return result;
635}
636
877211f5
TI		 637static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
638 struct snd_pcm_sw_params *params)
1da177e4 639{
877211f5 640 struct snd_pcm_runtime *runtime;
1250932e 641 int err;
1da177e4 642
7eaa943c
TI		 643 if (PCM_RUNTIME_CHECK(substream))
644 return -ENXIO;
1da177e4 645 runtime = substream->runtime;
1da177e4
LT		 646 snd_pcm_stream_lock_irq(substream);
647 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
648 snd_pcm_stream_unlock_irq(substream);
649 return -EBADFD;
650 }
651 snd_pcm_stream_unlock_irq(substream);
652
653 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
654 return -EINVAL;
58900810
TI		 655 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
656 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 657 return -EINVAL;
1da177e4
LT		 658 if (params->avail_min == 0)
659 return -EINVAL;
1da177e4
LT		 660 if (params->silence_size >= runtime->boundary) {
661 if (params->silence_threshold != 0)
662 return -EINVAL;
663 } else {
664 if (params->silence_size > params->silence_threshold)
665 return -EINVAL;
666 if (params->silence_threshold > runtime->buffer_size)
667 return -EINVAL;
668 }
1250932e 669 err = 0;
1da177e4
LT		 670 snd_pcm_stream_lock_irq(substream);
671 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 672 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
673 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 674 runtime->period_step = params->period_step;
675 runtime->control->avail_min = params->avail_min;
676 runtime->start_threshold = params->start_threshold;
677 runtime->stop_threshold = params->stop_threshold;
678 runtime->silence_threshold = params->silence_threshold;
679 runtime->silence_size = params->silence_size;
1da177e4
LT		 680 params->boundary = runtime->boundary;
681 if (snd_pcm_running(substream)) {
1da177e4
LT		 682 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
683 runtime->silence_size > 0)
684 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 685 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 686 }
687 snd_pcm_stream_unlock_irq(substream);
1250932e 688 return err;
1da177e4
LT		 689}
690
877211f5
TI		 691static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
692 struct snd_pcm_sw_params __user * _params)
1da177e4 693{
877211f5 694 struct snd_pcm_sw_params params;
1da177e4
LT		 695 int err;
696 if (copy_from_user(&params, _params, sizeof(params)))
697 return -EFAULT;
698 err = snd_pcm_sw_params(substream, &params);
699 if (copy_to_user(_params, &params, sizeof(params)))
700 return -EFAULT;
701 return err;
702}
703
877211f5
TI		 704int snd_pcm_status(struct snd_pcm_substream *substream,
705 struct snd_pcm_status *status)
1da177e4 706{
877211f5 707 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 708
709 snd_pcm_stream_lock_irq(substream);
710 status->state = runtime->status->state;
711 status->suspended_state = runtime->status->suspended_state;
712 if (status->state == SNDRV_PCM_STATE_OPEN)
713 goto _end;
714 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 715 if (snd_pcm_running(substream)) {
1da177e4 716 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 717 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
718 status->tstamp = runtime->status->tstamp;
4eeaaeae
PLB		 719 status->audio_tstamp =
720 runtime->status->audio_tstamp;
8c121586
JK		 721 goto _tstamp_end;
722 }
723 }
a713b583 724 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 725 _tstamp_end:
1da177e4
LT		 726 status->appl_ptr = runtime->control->appl_ptr;
727 status->hw_ptr = runtime->status->hw_ptr;
728 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
729 status->avail = snd_pcm_playback_avail(runtime);
730 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 731 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 732 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 733 status->delay += runtime->delay;
734 } else
1da177e4
LT		 735 status->delay = 0;
736 } else {
737 status->avail = snd_pcm_capture_avail(runtime);
738 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 739 status->delay = status->avail + runtime->delay;
1da177e4
LT		 740 else
741 status->delay = 0;
742 }
743 status->avail_max = runtime->avail_max;
744 status->overrange = runtime->overrange;
745 runtime->avail_max = 0;
746 runtime->overrange = 0;
747 _end:
748 snd_pcm_stream_unlock_irq(substream);
749 return 0;
750}
751
877211f5
TI		 752static int snd_pcm_status_user(struct snd_pcm_substream *substream,
753 struct snd_pcm_status __user * _status)
1da177e4 754{
877211f5 755 struct snd_pcm_status status;
1da177e4
LT		 756 int res;
757
1da177e4
LT		 758 memset(&status, 0, sizeof(status));
759 res = snd_pcm_status(substream, &status);
760 if (res < 0)
761 return res;
762 if (copy_to_user(_status, &status, sizeof(status)))
763 return -EFAULT;
764 return 0;
765}
766
877211f5
TI		 767static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
768 struct snd_pcm_channel_info * info)
1da177e4 769{
877211f5 770 struct snd_pcm_runtime *runtime;
1da177e4
LT		 771 unsigned int channel;
772
1da177e4
LT		 773 channel = info->channel;
774 runtime = substream->runtime;
775 snd_pcm_stream_lock_irq(substream);
776 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
777 snd_pcm_stream_unlock_irq(substream);
778 return -EBADFD;
779 }
780 snd_pcm_stream_unlock_irq(substream);
781 if (channel >= runtime->channels)
782 return -EINVAL;
783 memset(info, 0, sizeof(*info));
784 info->channel = channel;
785 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
786}
787
877211f5
TI		 788static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
789 struct snd_pcm_channel_info __user * _info)
1da177e4 790{
877211f5 791 struct snd_pcm_channel_info info;
1da177e4
LT		 792 int res;
793
794 if (copy_from_user(&info, _info, sizeof(info)))
795 return -EFAULT;
796 res = snd_pcm_channel_info(substream, &info);
797 if (res < 0)
798 return res;
799 if (copy_to_user(_info, &info, sizeof(info)))
800 return -EFAULT;
801 return 0;
802}
803
877211f5 804static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 805{
877211f5 806 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 807 if (runtime->trigger_master == NULL)
808 return;
809 if (runtime->trigger_master == substream) {
b751eef1 810 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 811 } else {
812 snd_pcm_trigger_tstamp(runtime->trigger_master);
813 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
814 }
815 runtime->trigger_master = NULL;
816}
817
818struct action_ops {
877211f5
TI		 819 int (*pre_action)(struct snd_pcm_substream *substream, int state);
820 int (*do_action)(struct snd_pcm_substream *substream, int state);
821 void (*undo_action)(struct snd_pcm_substream *substream, int state);
822 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 823};
824
825/*
826 * this functions is core for handling of linked stream
827 * Note: the stream state might be changed also on failure
828 * Note2: call with calling stream lock + link lock
829 */
830static int snd_pcm_action_group(struct action_ops *ops,
877211f5 831 struct snd_pcm_substream *substream,
1da177e4
LT		 832 int state, int do_lock)
833{
877211f5
TI		 834 struct snd_pcm_substream *s = NULL;
835 struct snd_pcm_substream *s1;
dde1c652 836 int res = 0, depth = 1;
1da177e4 837
ef991b95 838 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 839 if (do_lock && s != substream) {
840 if (s->pcm->nonatomic)
dde1c652 841 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 842 else
dde1c652
TI		 843 spin_lock_nested(&s->self_group.lock, depth);
844 depth++;
257f8cce 845 }
1da177e4
LT		 846 res = ops->pre_action(s, state);
847 if (res < 0)
848 goto _unlock;
849 }
ef991b95 850 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 851 res = ops->do_action(s, state);
852 if (res < 0) {
853 if (ops->undo_action) {
ef991b95 854 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 855 if (s1 == s) /* failed stream */
856 break;
857 ops->undo_action(s1, state);
858 }
859 }
860 s = NULL; /* unlock all */
861 goto _unlock;
862 }
863 }
ef991b95 864 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 865 ops->post_action(s, state);
866 }
867 _unlock:
868 if (do_lock) {
869 /* unlock streams */
ef991b95 870 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 871 if (s1 != substream) {
811deede 872 if (s1->pcm->nonatomic)
257f8cce
TI		 873 mutex_unlock(&s1->self_group.mutex);
874 else
875 spin_unlock(&s1->self_group.lock);
876 }
1da177e4
LT		 877 if (s1 == s) /* end */
878 break;
879 }
880 }
881 return res;
882}
883
884/*
885 * Note: call with stream lock
886 */
887static int snd_pcm_action_single(struct action_ops *ops,
877211f5 888 struct snd_pcm_substream *substream,
1da177e4
LT		 889 int state)
890{
891 int res;
892
893 res = ops->pre_action(substream, state);
894 if (res < 0)
895 return res;
896 res = ops->do_action(substream, state);
897 if (res == 0)
898 ops->post_action(substream, state);
899 else if (ops->undo_action)
900 ops->undo_action(substream, state);
901 return res;
902}
903
aa8edd8c
TI		 904/*
905 * Note: call with stream lock
906 */
907static int snd_pcm_action(struct action_ops *ops,
908 struct snd_pcm_substream *substream,
909 int state)
257f8cce
TI		 910{
911 int res;
912
aa8edd8c
TI		 913 if (!snd_pcm_stream_linked(substream))
914 return snd_pcm_action_single(ops, substream, state);
915
916 if (substream->pcm->nonatomic) {
257f8cce
TI		 917 if (!mutex_trylock(&substream->group->mutex)) {
918 mutex_unlock(&substream->self_group.mutex);
919 mutex_lock(&substream->group->mutex);
920 mutex_lock(&substream->self_group.mutex);
921 }
922 res = snd_pcm_action_group(ops, substream, state, 1);
923 mutex_unlock(&substream->group->mutex);
924 } else {
1da177e4
LT		 925 if (!spin_trylock(&substream->group->lock)) {
926 spin_unlock(&substream->self_group.lock);
927 spin_lock(&substream->group->lock);
928 spin_lock(&substream->self_group.lock);
929 }
930 res = snd_pcm_action_group(ops, substream, state, 1);
931 spin_unlock(&substream->group->lock);
1da177e4
LT		 932 }
933 return res;
934}
935
936/*
937 * Note: don't use any locks before
938 */
939static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 940 struct snd_pcm_substream *substream,
1da177e4
LT		 941 int state)
942{
943 int res;
944
e3a4bd5e
TI		 945 snd_pcm_stream_lock_irq(substream);
946 res = snd_pcm_action(ops, substream, state);
947 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 948 return res;
949}
950
951/*
952 */
953static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 954 struct snd_pcm_substream *substream,
1da177e4
LT		 955 int state)
956{
957 int res;
958
959 down_read(&snd_pcm_link_rwsem);
960 if (snd_pcm_stream_linked(substream))
961 res = snd_pcm_action_group(ops, substream, state, 0);
962 else
963 res = snd_pcm_action_single(ops, substream, state);
964 up_read(&snd_pcm_link_rwsem);
965 return res;
966}
967
968/*
969 * start callbacks
970 */
877211f5 971static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 972{
877211f5 973 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 974 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
975 return -EBADFD;
976 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
977 !snd_pcm_playback_data(substream))
978 return -EPIPE;
979 runtime->trigger_master = substream;
980 return 0;
981}
982
877211f5 983static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 984{
985 if (substream->runtime->trigger_master != substream)
986 return 0;
987 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
988}
989
877211f5 990static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 991{
992 if (substream->runtime->trigger_master == substream)
993 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
994}
995
877211f5 996static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 997{
877211f5 998 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 999 snd_pcm_trigger_tstamp(substream);
6af3fb72 1000 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1001 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1002 runtime->rate;
1da177e4
LT		 1003 runtime->status->state = state;
1004 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1005 runtime->silence_size > 0)
1006 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 1007 if (substream->timer)
877211f5
TI		 1008 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1009 &runtime->trigger_tstamp);
1da177e4
LT		 1010}
1011
1012static struct action_ops snd_pcm_action_start = {
1013 .pre_action = snd_pcm_pre_start,
1014 .do_action = snd_pcm_do_start,
1015 .undo_action = snd_pcm_undo_start,
1016 .post_action = snd_pcm_post_start
1017};
1018
1019/**
1c85cc64 1020 * snd_pcm_start - start all linked streams
df8db936 1021 * @substream: the PCM substream instance
eb7c06e8
YB		 1022 *
1023 * Return: Zero if successful, or a negative error code.
1da177e4 1024 */
877211f5 1025int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1026{
877211f5
TI		 1027 return snd_pcm_action(&snd_pcm_action_start, substream,
1028 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1029}
1030
1031/*
1032 * stop callbacks
1033 */
877211f5 1034static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1035{
877211f5 1036 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1037 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1038 return -EBADFD;
1039 runtime->trigger_master = substream;
1040 return 0;
1041}
1042
877211f5 1043static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1044{
1045 if (substream->runtime->trigger_master == substream &&
1046 snd_pcm_running(substream))
1047 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1048 return 0; /* unconditonally stop all substreams */
1049}
1050
877211f5 1051static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1052{
877211f5 1053 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1054 if (runtime->status->state != state) {
1055 snd_pcm_trigger_tstamp(substream);
9bc889b4 1056 runtime->status->state = state;
1da177e4 1057 if (substream->timer)
877211f5
TI		 1058 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1059 &runtime->trigger_tstamp);
1da177e4
LT		 1060 }
1061 wake_up(&runtime->sleep);
c91a988d 1062 wake_up(&runtime->tsleep);
1da177e4
LT		 1063}
1064
1065static struct action_ops snd_pcm_action_stop = {
1066 .pre_action = snd_pcm_pre_stop,
1067 .do_action = snd_pcm_do_stop,
1068 .post_action = snd_pcm_post_stop
1069};
1070
1071/**
1c85cc64 1072 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1073 * @substream: the PCM substream instance
1074 * @state: PCM state after stopping the stream
1da177e4 1075 *
1c85cc64 1076 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1077 *
0a11458c 1078 * Return: Zero if successful, or a negative error code.
1da177e4 1079 */
fea952e5 1080int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1081{
1082 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1083}
1084
e88e8ae6
TI		 1085EXPORT_SYMBOL(snd_pcm_stop);
1086
1da177e4 1087/**
1c85cc64 1088 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1089 * @substream: the PCM substream
1da177e4 1090 *
1c85cc64 1091 * After stopping, the state is changed to SETUP.
1da177e4 1092 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1093 *
1094 * Return: Zero if succesful, or a negative error code.
1da177e4 1095 */
877211f5 1096int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1097{
877211f5
TI		 1098 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1099 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1100}
1101
1fb8510c
TI		 1102/**
1103 * snd_pcm_stop_xrun - stop the running streams as XRUN
1104 * @substream: the PCM substream instance
1fb8510c
TI		 1105 *
1106 * This stops the given running substream (and all linked substreams) as XRUN.
1107 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1108 *
1109 * Return: Zero if successful, or a negative error code.
1110 */
1111int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1112{
1113 unsigned long flags;
1114 int ret = 0;
1115
1116 snd_pcm_stream_lock_irqsave(substream, flags);
1117 if (snd_pcm_running(substream))
1118 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1119 snd_pcm_stream_unlock_irqrestore(substream, flags);
1120 return ret;
1121}
1122EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1123
1da177e4
LT		 1124/*
1125 * pause callbacks
1126 */
877211f5 1127static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1128{
877211f5 1129 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1130 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1131 return -ENOSYS;
1132 if (push) {
1133 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1134 return -EBADFD;
1135 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1136 return -EBADFD;
1137 runtime->trigger_master = substream;
1138 return 0;
1139}
1140
877211f5 1141static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1142{
1143 if (substream->runtime->trigger_master != substream)
1144 return 0;
56385a12
JK		 1145 /* some drivers might use hw_ptr to recover from the pause -
1146 update the hw_ptr now */
1147 if (push)
1148 snd_pcm_update_hw_ptr(substream);
6af3fb72 1149 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1150 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1151 * delta, effectively to skip the check once.
1152 */
1153 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1154 return substream->ops->trigger(substream,
1155 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1156 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1157}
1158
877211f5 1159static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1160{
1161 if (substream->runtime->trigger_master == substream)
1162 substream->ops->trigger(substream,
1163 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1164 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1165}
1166
877211f5 1167static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1168{
877211f5 1169 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1170 snd_pcm_trigger_tstamp(substream);
1171 if (push) {
1172 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1173 if (substream->timer)
877211f5
TI		 1174 snd_timer_notify(substream->timer,
1175 SNDRV_TIMER_EVENT_MPAUSE,
1176 &runtime->trigger_tstamp);
1da177e4 1177 wake_up(&runtime->sleep);
c91a988d 1178 wake_up(&runtime->tsleep);
1da177e4
LT		 1179 } else {
1180 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1181 if (substream->timer)
877211f5
TI		 1182 snd_timer_notify(substream->timer,
1183 SNDRV_TIMER_EVENT_MCONTINUE,
1184 &runtime->trigger_tstamp);
1da177e4
LT		 1185 }
1186}
1187
1188static struct action_ops snd_pcm_action_pause = {
1189 .pre_action = snd_pcm_pre_pause,
1190 .do_action = snd_pcm_do_pause,
1191 .undo_action = snd_pcm_undo_pause,
1192 .post_action = snd_pcm_post_pause
1193};
1194
1195/*
1196 * Push/release the pause for all linked streams.
1197 */
877211f5 1198static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1199{
1200 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1201}
1202
1203#ifdef CONFIG_PM
1204/* suspend */
1205
877211f5 1206static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1207{
877211f5 1208 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1209 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1210 return -EBUSY;
1211 runtime->trigger_master = substream;
1212 return 0;
1213}
1214
877211f5 1215static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1216{
877211f5 1217 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1218 if (runtime->trigger_master != substream)
1219 return 0;
1220 if (! snd_pcm_running(substream))
1221 return 0;
1222 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1223 return 0; /* suspend unconditionally */
1224}
1225
877211f5 1226static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1227{
877211f5 1228 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1229 snd_pcm_trigger_tstamp(substream);
9bc889b4
TI		 1230 runtime->status->suspended_state = runtime->status->state;
1231 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1232 if (substream->timer)
877211f5
TI		 1233 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1234 &runtime->trigger_tstamp);
1da177e4 1235 wake_up(&runtime->sleep);
c91a988d 1236 wake_up(&runtime->tsleep);
1da177e4
LT		 1237}
1238
1239static struct action_ops snd_pcm_action_suspend = {
1240 .pre_action = snd_pcm_pre_suspend,
1241 .do_action = snd_pcm_do_suspend,
1242 .post_action = snd_pcm_post_suspend
1243};
1244
1245/**
1c85cc64 1246 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1247 * @substream: the PCM substream
1da177e4 1248 *
1da177e4 1249 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1250 *
1251 * Return: Zero if successful (or @substream is %NULL), or a negative error
1252 * code.
1da177e4 1253 */
877211f5 1254int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1255{
1256 int err;
1257 unsigned long flags;
1258
603bf524
TI		 1259 if (! substream)
1260 return 0;
1261
1da177e4
LT		 1262 snd_pcm_stream_lock_irqsave(substream, flags);
1263 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1264 snd_pcm_stream_unlock_irqrestore(substream, flags);
1265 return err;
1266}
1267
e88e8ae6
TI		 1268EXPORT_SYMBOL(snd_pcm_suspend);
1269
1da177e4 1270/**
1c85cc64 1271 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1272 * @pcm: the PCM instance
1da177e4 1273 *
1da177e4 1274 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1275 *
1276 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1277 */
877211f5 1278int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1279{
877211f5 1280 struct snd_pcm_substream *substream;
1da177e4
LT		 1281 int stream, err = 0;
1282
603bf524
TI		 1283 if (! pcm)
1284 return 0;
1285
1da177e4 1286 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1287 for (substream = pcm->streams[stream].substream;
1288 substream; substream = substream->next) {
1da177e4
LT		 1289 /* FIXME: the open/close code should lock this as well */
1290 if (substream->runtime == NULL)
1291 continue;
1292 err = snd_pcm_suspend(substream);
1293 if (err < 0 && err != -EBUSY)
1294 return err;
1295 }
1296 }
1297 return 0;
1298}
1299
e88e8ae6
TI		 1300EXPORT_SYMBOL(snd_pcm_suspend_all);
1301
1da177e4
LT		 1302/* resume */
1303
877211f5 1304static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1305{
877211f5 1306 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1307 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1308 return -ENOSYS;
1309 runtime->trigger_master = substream;
1310 return 0;
1311}
1312
877211f5 1313static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1314{
877211f5 1315 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1316 if (runtime->trigger_master != substream)
1317 return 0;
1318 /* DMA not running previously? */
1319 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1320 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1321 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1322 return 0;
1323 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1324}
1325
877211f5 1326static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1327{
1328 if (substream->runtime->trigger_master == substream &&
1329 snd_pcm_running(substream))
1330 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1331}
1332
877211f5 1333static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1334{
877211f5 1335 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1336 snd_pcm_trigger_tstamp(substream);
9bc889b4 1337 runtime->status->state = runtime->status->suspended_state;
1da177e4 1338 if (substream->timer)
877211f5
TI		 1339 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1340 &runtime->trigger_tstamp);
1da177e4
LT		 1341}
1342
1343static struct action_ops snd_pcm_action_resume = {
1344 .pre_action = snd_pcm_pre_resume,
1345 .do_action = snd_pcm_do_resume,
1346 .undo_action = snd_pcm_undo_resume,
1347 .post_action = snd_pcm_post_resume
1348};
1349
877211f5 1350static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1351{
877211f5 1352 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1353 int res;
1354
1355 snd_power_lock(card);
cbac4b0c 1356 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1357 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1358 snd_power_unlock(card);
1359 return res;
1360}
1361
1362#else
1363
877211f5 1364static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1365{
1366 return -ENOSYS;
1367}
1368
1369#endif /* CONFIG_PM */
1370
1371/*
1372 * xrun ioctl
1373 *
1374 * Change the RUNNING stream(s) to XRUN state.
1375 */
877211f5 1376static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1377{
877211f5
TI		 1378 struct snd_card *card = substream->pcm->card;
1379 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1380 int result;
1381
1382 snd_power_lock(card);
1383 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1384 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1385 if (result < 0)
1386 goto _unlock;
1387 }
1388
1389 snd_pcm_stream_lock_irq(substream);
1390 switch (runtime->status->state) {
1391 case SNDRV_PCM_STATE_XRUN:
1392 result = 0; /* already there */
1393 break;
1394 case SNDRV_PCM_STATE_RUNNING:
1395 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1396 break;
1397 default:
1398 result = -EBADFD;
1399 }
1400 snd_pcm_stream_unlock_irq(substream);
1401 _unlock:
1402 snd_power_unlock(card);
1403 return result;
1404}
1405
1406/*
1407 * reset ioctl
1408 */
877211f5 1409static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1410{
877211f5 1411 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1412 switch (runtime->status->state) {
1413 case SNDRV_PCM_STATE_RUNNING:
1414 case SNDRV_PCM_STATE_PREPARED:
1415 case SNDRV_PCM_STATE_PAUSED:
1416 case SNDRV_PCM_STATE_SUSPENDED:
1417 return 0;
1418 default:
1419 return -EBADFD;
1420 }
1421}
1422
877211f5 1423static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1424{
877211f5 1425 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1426 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1427 if (err < 0)
1428 return err;
1da177e4 1429 runtime->hw_ptr_base = 0;
e7636925
JK		 1430 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1431 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1432 runtime->silence_start = runtime->status->hw_ptr;
1433 runtime->silence_filled = 0;
1434 return 0;
1435}
1436
877211f5 1437static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1438{
877211f5 1439 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1440 runtime->control->appl_ptr = runtime->status->hw_ptr;
1441 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1442 runtime->silence_size > 0)
1443 snd_pcm_playback_silence(substream, ULONG_MAX);
1444}
1445
1446static struct action_ops snd_pcm_action_reset = {
1447 .pre_action = snd_pcm_pre_reset,
1448 .do_action = snd_pcm_do_reset,
1449 .post_action = snd_pcm_post_reset
1450};
1451
877211f5 1452static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1453{
1454 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1455}
1456
1457/*
1458 * prepare ioctl
1459 */
0df63e44
TI		 1460/* we use the second argument for updating f_flags */
1461static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1462 int f_flags)
1da177e4 1463{
877211f5 1464 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1465 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1466 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1467 return -EBADFD;
1468 if (snd_pcm_running(substream))
1469 return -EBUSY;
0df63e44 1470 substream->f_flags = f_flags;
1da177e4
LT		 1471 return 0;
1472}
1473
877211f5 1474static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1475{
1476 int err;
1477 err = substream->ops->prepare(substream);
1478 if (err < 0)
1479 return err;
1480 return snd_pcm_do_reset(substream, 0);
1481}
1482
877211f5 1483static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1484{
877211f5 1485 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1486 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1487 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1488}
1489
1490static struct action_ops snd_pcm_action_prepare = {
1491 .pre_action = snd_pcm_pre_prepare,
1492 .do_action = snd_pcm_do_prepare,
1493 .post_action = snd_pcm_post_prepare
1494};
1495
1496/**
1c85cc64 1497 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1498 * @substream: the PCM substream instance
0df63e44 1499 * @file: file to refer f_flags
eb7c06e8
YB		 1500 *
1501 * Return: Zero if successful, or a negative error code.
1da177e4 1502 */
0df63e44
TI		 1503static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1504 struct file *file)
1da177e4
LT		 1505{
1506 int res;
877211f5 1507 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1508 int f_flags;
1509
1510 if (file)
1511 f_flags = file->f_flags;
1512 else
1513 f_flags = substream->f_flags;
1da177e4
LT		 1514
1515 snd_power_lock(card);
cbac4b0c 1516 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1517 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1518 substream, f_flags);
1da177e4
LT		 1519 snd_power_unlock(card);
1520 return res;
1521}
1522
1523/*
1524 * drain ioctl
1525 */
1526
877211f5 1527static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1528{
4f7c39dc
TI		 1529 struct snd_pcm_runtime *runtime = substream->runtime;
1530 switch (runtime->status->state) {
1531 case SNDRV_PCM_STATE_OPEN:
1532 case SNDRV_PCM_STATE_DISCONNECTED:
1533 case SNDRV_PCM_STATE_SUSPENDED:
1534 return -EBADFD;
1535 }
1536 runtime->trigger_master = substream;
1da177e4
LT		 1537 return 0;
1538}
1539
877211f5 1540static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1541{
877211f5 1542 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1543 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1544 switch (runtime->status->state) {
1545 case SNDRV_PCM_STATE_PREPARED:
1546 /* start playback stream if possible */
1547 if (! snd_pcm_playback_empty(substream)) {
1548 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1549 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1550 }
1551 break;
1552 case SNDRV_PCM_STATE_RUNNING:
1553 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1554 break;
4f7c39dc
TI		 1555 case SNDRV_PCM_STATE_XRUN:
1556 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1557 break;
1da177e4
LT		 1558 default:
1559 break;
1560 }
1561 } else {
1562 /* stop running stream */
1563 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1564 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1565 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1566 snd_pcm_do_stop(substream, new_state);
1567 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1568 }
1569 }
48d88297
LY		 1570
1571 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1572 runtime->trigger_master == substream &&
1573 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1574 return substream->ops->trigger(substream,
1575 SNDRV_PCM_TRIGGER_DRAIN);
1576
1da177e4
LT		 1577 return 0;
1578}
1579
877211f5 1580static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1581{
1582}
1583
1584static struct action_ops snd_pcm_action_drain_init = {
1585 .pre_action = snd_pcm_pre_drain_init,
1586 .do_action = snd_pcm_do_drain_init,
1587 .post_action = snd_pcm_post_drain_init
1588};
1589
877211f5 1590static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1591
1592/*
1593 * Drain the stream(s).
1594 * When the substream is linked, sync until the draining of all playback streams
1595 * is finished.
1596 * After this call, all streams are supposed to be either SETUP or DRAINING
1597 * (capture only) state.
1598 */
4cdc115f
TI		 1599static int snd_pcm_drain(struct snd_pcm_substream *substream,
1600 struct file *file)
1da177e4 1601{
877211f5
TI		 1602 struct snd_card *card;
1603 struct snd_pcm_runtime *runtime;
ef991b95 1604 struct snd_pcm_substream *s;
d3a7dcfe 1605 wait_queue_t wait;
1da177e4 1606 int result = 0;
4cdc115f 1607 int nonblock = 0;
1da177e4 1608
1da177e4
LT		 1609 card = substream->pcm->card;
1610 runtime = substream->runtime;
1611
1612 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1613 return -EBADFD;
1614
1da177e4
LT		 1615 snd_power_lock(card);
1616 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1617 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1618 if (result < 0) {
1619 snd_power_unlock(card);
1620 return result;
1621 }
1da177e4
LT		 1622 }
1623
4cdc115f
TI		 1624 if (file) {
1625 if (file->f_flags & O_NONBLOCK)
1626 nonblock = 1;
1627 } else if (substream->f_flags & O_NONBLOCK)
1628 nonblock = 1;
1629
21cb2a2e 1630 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1631 snd_pcm_stream_lock_irq(substream);
1632 /* resume pause */
d3a7dcfe 1633 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1634 snd_pcm_pause(substream, 0);
1635
1636 /* pre-start/stop - all running streams are changed to DRAINING state */
1637 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1638 if (result < 0)
1639 goto unlock;
1640 /* in non-blocking, we don't wait in ioctl but let caller poll */
1641 if (nonblock) {
1642 result = -EAGAIN;
1643 goto unlock;
21cb2a2e 1644 }
1da177e4
LT		 1645
1646 for (;;) {
1647 long tout;
d3a7dcfe 1648 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1649 if (signal_pending(current)) {
1650 result = -ERESTARTSYS;
1651 break;
1652 }
d3a7dcfe
TI		 1653 /* find a substream to drain */
1654 to_check = NULL;
1655 snd_pcm_group_for_each_entry(s, substream) {
1656 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1657 continue;
1658 runtime = s->runtime;
1659 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1660 to_check = runtime;
21cb2a2e 1661 break;
d3a7dcfe 1662 }
21cb2a2e 1663 }
d3a7dcfe
TI		 1664 if (!to_check)
1665 break; /* all drained */
1666 init_waitqueue_entry(&wait, current);
1667 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1668 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1669 up_read(&snd_pcm_link_rwsem);
1da177e4 1670 snd_power_unlock(card);
f2b3614c
TI		 1671 if (runtime->no_period_wakeup)
1672 tout = MAX_SCHEDULE_TIMEOUT;
1673 else {
1674 tout = 10;
1675 if (runtime->rate) {
1676 long t = runtime->period_size * 2 / runtime->rate;
1677 tout = max(t, tout);
1678 }
1679 tout = msecs_to_jiffies(tout * 1000);
1680 }
1681 tout = schedule_timeout_interruptible(tout);
1da177e4 1682 snd_power_lock(card);
d3a7dcfe 1683 down_read(&snd_pcm_link_rwsem);
1da177e4 1684 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1685 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1686 if (card->shutdown) {
1687 result = -ENODEV;
1688 break;
1689 }
1da177e4
LT		 1690 if (tout == 0) {
1691 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1692 result = -ESTRPIPE;
1693 else {
09e56df8
TI		 1694 dev_dbg(substream->pcm->card->dev,
1695 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 1696 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1697 result = -EIO;
1698 }
1699 break;
1700 }
1da177e4 1701 }
21cb2a2e 1702
4cdc115f 1703 unlock:
21cb2a2e 1704 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1705 up_read(&snd_pcm_link_rwsem);
1da177e4 1706 snd_power_unlock(card);
1da177e4
LT		 1707
1708 return result;
1709}
1710
1711/*
1712 * drop ioctl
1713 *
1714 * Immediately put all linked substreams into SETUP state.
1715 */
877211f5 1716static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1717{
877211f5 1718 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1719 int result = 0;
1720
7eaa943c
TI		 1721 if (PCM_RUNTIME_CHECK(substream))
1722 return -ENXIO;
1da177e4 1723 runtime = substream->runtime;
1da177e4 1724
de1b8b93 1725 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1726 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1727 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1728 return -EBADFD;
1729
1da177e4
LT		 1730 snd_pcm_stream_lock_irq(substream);
1731 /* resume pause */
1732 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1733 snd_pcm_pause(substream, 0);
1734
1735 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1736 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1737 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1738
1da177e4
LT		 1739 return result;
1740}
1741
1742
0888c321 1743static bool is_pcm_file(struct file *file)
1da177e4 1744{
0888c321 1745 struct inode *inode = file_inode(file);
f87135f5
CL		 1746 unsigned int minor;
1747
0888c321
AV		 1748 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1749 return false;
1da177e4 1750 minor = iminor(inode);
0888c321
AV		 1751 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1752 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1da177e4
LT		 1753}
1754
1755/*
1756 * PCM link handling
1757 */
877211f5 1758static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1759{
1760 int res = 0;
877211f5
TI		 1761 struct snd_pcm_file *pcm_file;
1762 struct snd_pcm_substream *substream1;
1662591b 1763 struct snd_pcm_group *group;
0888c321 1764 struct fd f = fdget(fd);
1da177e4 1765
0888c321 1766 if (!f.file)
1da177e4 1767 return -EBADFD;
0888c321
AV		 1768 if (!is_pcm_file(f.file)) {
1769 res = -EBADFD;
1770 goto _badf;
1771 }
1772 pcm_file = f.file->private_data;
1da177e4 1773 substream1 = pcm_file->substream;
1662591b
TI		 1774 group = kmalloc(sizeof(*group), GFP_KERNEL);
1775 if (!group) {
1776 res = -ENOMEM;
1777 goto _nolock;
1778 }
1da177e4
LT		 1779 down_write(&snd_pcm_link_rwsem);
1780 write_lock_irq(&snd_pcm_link_rwlock);
1781 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 1782 substream->runtime->status->state != substream1->runtime->status->state ||
1783 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 1784 res = -EBADFD;
1785 goto _end;
1786 }
1787 if (snd_pcm_stream_linked(substream1)) {
1788 res = -EALREADY;
1789 goto _end;
1790 }
1791 if (!snd_pcm_stream_linked(substream)) {
1662591b 1792 substream->group = group;
dd6c5cd8 1793 group = NULL;
1da177e4 1794 spin_lock_init(&substream->group->lock);
257f8cce 1795 mutex_init(&substream->group->mutex);
1da177e4
LT		 1796 INIT_LIST_HEAD(&substream->group->substreams);
1797 list_add_tail(&substream->link_list, &substream->group->substreams);
1798 substream->group->count = 1;
1799 }
1800 list_add_tail(&substream1->link_list, &substream->group->substreams);
1801 substream->group->count++;
1802 substream1->group = substream->group;
1803 _end:
1804 write_unlock_irq(&snd_pcm_link_rwlock);
1805 up_write(&snd_pcm_link_rwsem);
1662591b 1806 _nolock:
a0830dbd 1807 snd_card_unref(substream1->pcm->card);
dd6c5cd8 1808 kfree(group);
0888c321
AV		 1809 _badf:
1810 fdput(f);
1da177e4
LT		 1811 return res;
1812}
1813
877211f5 1814static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1815{
1816 substream->group = &substream->self_group;
1817 INIT_LIST_HEAD(&substream->self_group.substreams);
1818 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1819}
1820
877211f5 1821static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1822{
ef991b95 1823 struct snd_pcm_substream *s;
1da177e4
LT		 1824 int res = 0;
1825
1826 down_write(&snd_pcm_link_rwsem);
1827 write_lock_irq(&snd_pcm_link_rwlock);
1828 if (!snd_pcm_stream_linked(substream)) {
1829 res = -EALREADY;
1830 goto _end;
1831 }
1832 list_del(&substream->link_list);
1833 substream->group->count--;
1834 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1835 snd_pcm_group_for_each_entry(s, substream) {
1836 relink_to_local(s);
1da177e4
LT		 1837 break;
1838 }
1839 kfree(substream->group);
1840 }
1841 relink_to_local(substream);
1842 _end:
1843 write_unlock_irq(&snd_pcm_link_rwlock);
1844 up_write(&snd_pcm_link_rwsem);
1845 return res;
1846}
1847
1848/*
1849 * hw configurator
1850 */
877211f5
TI		 1851static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1852 struct snd_pcm_hw_rule *rule)
1da177e4 1853{
877211f5 1854 struct snd_interval t;
1da177e4
LT		 1855 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1856 hw_param_interval_c(params, rule->deps[1]), &t);
1857 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1858}
1859
877211f5
TI		 1860static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1861 struct snd_pcm_hw_rule *rule)
1da177e4 1862{
877211f5 1863 struct snd_interval t;
1da177e4
LT		 1864 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1865 hw_param_interval_c(params, rule->deps[1]), &t);
1866 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1867}
1868
877211f5
TI		 1869static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1870 struct snd_pcm_hw_rule *rule)
1da177e4 1871{
877211f5 1872 struct snd_interval t;
1da177e4
LT		 1873 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1874 hw_param_interval_c(params, rule->deps[1]),
1875 (unsigned long) rule->private, &t);
1876 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1877}
1878
877211f5
TI		 1879static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1880 struct snd_pcm_hw_rule *rule)
1da177e4 1881{
877211f5 1882 struct snd_interval t;
1da177e4
LT		 1883 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1884 (unsigned long) rule->private,
1885 hw_param_interval_c(params, rule->deps[1]), &t);
1886 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1887}
1888
877211f5
TI		 1889static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1890 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1891{
1892 unsigned int k;
877211f5
TI		 1893 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1894 struct snd_mask m;
1895 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1896 snd_mask_any(&m);
1897 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1898 int bits;
1899 if (! snd_mask_test(mask, k))
1900 continue;
1901 bits = snd_pcm_format_physical_width(k);
1902 if (bits <= 0)
1903 continue; /* ignore invalid formats */
1904 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1905 snd_mask_reset(&m, k);
1906 }
1907 return snd_mask_refine(mask, &m);
1908}
1909
877211f5
TI		 1910static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1911 struct snd_pcm_hw_rule *rule)
1da177e4 1912{
877211f5 1913 struct snd_interval t;
1da177e4
LT		 1914 unsigned int k;
1915 t.min = UINT_MAX;
1916 t.max = 0;
1917 t.openmin = 0;
1918 t.openmax = 0;
1919 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1920 int bits;
1921 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1922 continue;
1923 bits = snd_pcm_format_physical_width(k);
1924 if (bits <= 0)
1925 continue; /* ignore invalid formats */
1926 if (t.min > (unsigned)bits)
1927 t.min = bits;
1928 if (t.max < (unsigned)bits)
1929 t.max = bits;
1930 }
1931 t.integer = 1;
1932 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1933}
1934
1935#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1936#error "Change this table"
1937#endif
1938
1939static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1940 48000, 64000, 88200, 96000, 176400, 192000 };
1941
7653d557
CL		 1942const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1943 .count = ARRAY_SIZE(rates),
1944 .list = rates,
1945};
1946
877211f5
TI		 1947static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1948 struct snd_pcm_hw_rule *rule)
1da177e4 1949{
877211f5 1950 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1951 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1952 snd_pcm_known_rates.count,
1953 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1954}
1955
877211f5
TI		 1956static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1957 struct snd_pcm_hw_rule *rule)
1da177e4 1958{
877211f5
TI		 1959 struct snd_interval t;
1960 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1961 t.min = 0;
1962 t.max = substream->buffer_bytes_max;
1963 t.openmin = 0;
1964 t.openmax = 0;
1965 t.integer = 1;
1966 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1967}
1968
877211f5 1969int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1970{
877211f5
TI		 1971 struct snd_pcm_runtime *runtime = substream->runtime;
1972 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1973 int k, err;
1974
1975 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1976 snd_mask_any(constrs_mask(constrs, k));
1977 }
1978
1979 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1980 snd_interval_any(constrs_interval(constrs, k));
1981 }
1982
1983 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1984 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1985 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1986 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1987 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1988
1989 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1990 snd_pcm_hw_rule_format, NULL,
1991 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1992 if (err < 0)
1993 return err;
1994 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1995 snd_pcm_hw_rule_sample_bits, NULL,
1996 SNDRV_PCM_HW_PARAM_FORMAT,
1997 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1998 if (err < 0)
1999 return err;
2000 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2001 snd_pcm_hw_rule_div, NULL,
2002 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2003 if (err < 0)
2004 return err;
2005 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2006 snd_pcm_hw_rule_mul, NULL,
2007 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2008 if (err < 0)
2009 return err;
2010 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2011 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2012 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2013 if (err < 0)
2014 return err;
2015 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2016 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2017 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2018 if (err < 0)
2019 return err;
2020 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2021 snd_pcm_hw_rule_div, NULL,
2022 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2023 if (err < 0)
2024 return err;
2025 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2026 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2027 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2028 if (err < 0)
2029 return err;
2030 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2031 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2032 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2033 if (err < 0)
2034 return err;
2035 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2036 snd_pcm_hw_rule_div, NULL,
2037 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2038 if (err < 0)
2039 return err;
2040 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2041 snd_pcm_hw_rule_div, NULL,
2042 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2043 if (err < 0)
2044 return err;
2045 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2046 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2047 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2048 if (err < 0)
2049 return err;
2050 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2051 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2052 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2053 if (err < 0)
2054 return err;
2055 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2056 snd_pcm_hw_rule_mul, NULL,
2057 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2058 if (err < 0)
2059 return err;
2060 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2061 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2062 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2063 if (err < 0)
2064 return err;
2065 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2066 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2067 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2068 if (err < 0)
2069 return err;
2070 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2071 snd_pcm_hw_rule_muldivk, (void*) 8,
2072 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2073 if (err < 0)
2074 return err;
2075 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2076 snd_pcm_hw_rule_muldivk, (void*) 8,
2077 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2078 if (err < 0)
2079 return err;
2080 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2081 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2082 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2083 if (err < 0)
2084 return err;
2085 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2086 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2087 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2088 if (err < 0)
2089 return err;
2090 return 0;
2091}
2092
877211f5 2093int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2094{
877211f5
TI		 2095 struct snd_pcm_runtime *runtime = substream->runtime;
2096 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2097 int err;
2098 unsigned int mask = 0;
2099
2100 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2101 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2102 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2103 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
63825f3a 2104 if (hw_support_mmap(substream)) {
1da177e4
LT		 2105 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2106 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2107 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2108 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2109 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2110 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2111 }
2112 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2113 if (err < 0)
2114 return err;
1da177e4
LT		 2115
2116 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2117 if (err < 0)
2118 return err;
1da177e4
LT		 2119
2120 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 2121 if (err < 0)
2122 return err;
1da177e4
LT		 2123
2124 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2125 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2126 if (err < 0)
2127 return err;
1da177e4
LT		 2128
2129 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2130 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2131 if (err < 0)
2132 return err;
1da177e4
LT		 2133
2134 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2135 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2136 if (err < 0)
2137 return err;
1da177e4
LT		 2138
2139 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2140 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2141 if (err < 0)
2142 return err;
1da177e4
LT		 2143
2144 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2145 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2146 if (err < 0)
2147 return err;
1da177e4
LT		 2148
2149 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2150 snd_pcm_hw_rule_buffer_bytes_max, substream,
2151 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2152 if (err < 0)
2153 return err;
2154
2155 /* FIXME: remove */
2156 if (runtime->dma_bytes) {
2157 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2158 if (err < 0)
6cf95152 2159 return err;
1da177e4
LT		 2160 }
2161
2162 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2163 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2164 snd_pcm_hw_rule_rate, hw,
2165 SNDRV_PCM_HW_PARAM_RATE, -1);
2166 if (err < 0)
2167 return err;
2168 }
2169
2170 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2171 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2172
2173 return 0;
2174}
2175
3bf75f9b 2176static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2177{
1da177e4 2178 snd_pcm_unlink(substream);
3bf75f9b
TI		 2179}
2180
2181void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2182{
0df63e44
TI		 2183 substream->ref_count--;
2184 if (substream->ref_count > 0)
2185 return;
2186
3bf75f9b 2187 snd_pcm_drop(substream);
3bf75f9b 2188 if (substream->hw_opened) {
1da177e4
LT		 2189 if (substream->ops->hw_free != NULL)
2190 substream->ops->hw_free(substream);
2191 substream->ops->close(substream);
3bf75f9b 2192 substream->hw_opened = 0;
1da177e4 2193 }
8699a0b6
TI		 2194 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2195 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2196 if (substream->pcm_release) {
2197 substream->pcm_release(substream);
2198 substream->pcm_release = NULL;
2199 }
3bf75f9b
TI		 2200 snd_pcm_detach_substream(substream);
2201}
2202
e88e8ae6
TI		 2203EXPORT_SYMBOL(snd_pcm_release_substream);
2204
3bf75f9b
TI		 2205int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2206 struct file *file,
2207 struct snd_pcm_substream **rsubstream)
2208{
2209 struct snd_pcm_substream *substream;
2210 int err;
2211
2212 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2213 if (err < 0)
2214 return err;
0df63e44
TI		 2215 if (substream->ref_count > 1) {
2216 *rsubstream = substream;
2217 return 0;
2218 }
2219
3bf75f9b
TI		 2220 err = snd_pcm_hw_constraints_init(substream);
2221 if (err < 0) {
09e56df8 2222 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2223 goto error;
2224 }
2225
2226 if ((err = substream->ops->open(substream)) < 0)
2227 goto error;
2228
2229 substream->hw_opened = 1;
2230
2231 err = snd_pcm_hw_constraints_complete(substream);
2232 if (err < 0) {
09e56df8 2233 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2234 goto error;
2235 }
2236
2237 *rsubstream = substream;
1da177e4 2238 return 0;
3bf75f9b
TI		 2239
2240 error:
2241 snd_pcm_release_substream(substream);
2242 return err;
1da177e4
LT		 2243}
2244
e88e8ae6
TI		 2245EXPORT_SYMBOL(snd_pcm_open_substream);
2246
1da177e4 2247static int snd_pcm_open_file(struct file *file,
877211f5 2248 struct snd_pcm *pcm,
ffd3d5c6 2249 int stream)
1da177e4 2250{
877211f5
TI		 2251 struct snd_pcm_file *pcm_file;
2252 struct snd_pcm_substream *substream;
3bf75f9b 2253 int err;
1da177e4 2254
3bf75f9b
TI		 2255 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2256 if (err < 0)
2257 return err;
2258
548a648b
TI		 2259 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2260 if (pcm_file == NULL) {
2261 snd_pcm_release_substream(substream);
2262 return -ENOMEM;
2263 }
2264 pcm_file->substream = substream;
2265 if (substream->ref_count == 1) {
0df63e44
TI		 2266 substream->file = pcm_file;
2267 substream->pcm_release = pcm_release_private;
1da177e4 2268 }
1da177e4 2269 file->private_data = pcm_file;
ffd3d5c6 2270
1da177e4
LT		 2271 return 0;
2272}
2273
f87135f5
CL		 2274static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2275{
2276 struct snd_pcm *pcm;
02f4865f
TI		 2277 int err = nonseekable_open(inode, file);
2278 if (err < 0)
2279 return err;
f87135f5
CL		 2280 pcm = snd_lookup_minor_data(iminor(inode),
2281 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2282 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2283 if (pcm)
2284 snd_card_unref(pcm->card);
a0830dbd 2285 return err;
f87135f5
CL		 2286}
2287
2288static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2289{
877211f5 2290 struct snd_pcm *pcm;
02f4865f
TI		 2291 int err = nonseekable_open(inode, file);
2292 if (err < 0)
2293 return err;
f87135f5
CL		 2294 pcm = snd_lookup_minor_data(iminor(inode),
2295 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2296 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2297 if (pcm)
2298 snd_card_unref(pcm->card);
a0830dbd 2299 return err;
f87135f5
CL		 2300}
2301
2302static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2303{
2304 int err;
1da177e4
LT		 2305 wait_queue_t wait;
2306
1da177e4
LT		 2307 if (pcm == NULL) {
2308 err = -ENODEV;
2309 goto __error1;
2310 }
2311 err = snd_card_file_add(pcm->card, file);
2312 if (err < 0)
2313 goto __error1;
2314 if (!try_module_get(pcm->card->module)) {
2315 err = -EFAULT;
2316 goto __error2;
2317 }
2318 init_waitqueue_entry(&wait, current);
2319 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2320 mutex_lock(&pcm->open_mutex);
1da177e4 2321 while (1) {
ffd3d5c6 2322 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2323 if (err >= 0)
2324 break;
2325 if (err == -EAGAIN) {
2326 if (file->f_flags & O_NONBLOCK) {
2327 err = -EBUSY;
2328 break;
2329 }
2330 } else
2331 break;
2332 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2333 mutex_unlock(&pcm->open_mutex);
1da177e4 2334 schedule();
1a60d4c5 2335 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2336 if (pcm->card->shutdown) {
2337 err = -ENODEV;
2338 break;
2339 }
1da177e4
LT		 2340 if (signal_pending(current)) {
2341 err = -ERESTARTSYS;
2342 break;
2343 }
2344 }
2345 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2346 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2347 if (err < 0)
2348 goto __error;
2349 return err;
2350
2351 __error:
2352 module_put(pcm->card->module);
2353 __error2:
2354 snd_card_file_remove(pcm->card, file);
2355 __error1:
2356 return err;
2357}
2358
2359static int snd_pcm_release(struct inode *inode, struct file *file)
2360{
877211f5
TI		 2361 struct snd_pcm *pcm;
2362 struct snd_pcm_substream *substream;
2363 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2364
2365 pcm_file = file->private_data;
2366 substream = pcm_file->substream;
7eaa943c
TI		 2367 if (snd_BUG_ON(!substream))
2368 return -ENXIO;
1da177e4 2369 pcm = substream->pcm;
1a60d4c5 2370 mutex_lock(&pcm->open_mutex);
3bf75f9b 2371 snd_pcm_release_substream(substream);
548a648b 2372 kfree(pcm_file);
1a60d4c5 2373 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2374 wake_up(&pcm->open_wait);
2375 module_put(pcm->card->module);
2376 snd_card_file_remove(pcm->card, file);
2377 return 0;
2378}
2379
877211f5
TI		 2380static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2381 snd_pcm_uframes_t frames)
1da177e4 2382{
877211f5 2383 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2384 snd_pcm_sframes_t appl_ptr;
2385 snd_pcm_sframes_t ret;
2386 snd_pcm_sframes_t hw_avail;
2387
2388 if (frames == 0)
2389 return 0;
2390
2391 snd_pcm_stream_lock_irq(substream);
2392 switch (runtime->status->state) {
2393 case SNDRV_PCM_STATE_PREPARED:
2394 break;
2395 case SNDRV_PCM_STATE_DRAINING:
2396 case SNDRV_PCM_STATE_RUNNING:
2397 if (snd_pcm_update_hw_ptr(substream) >= 0)
2398 break;
2399 /* Fall through */
2400 case SNDRV_PCM_STATE_XRUN:
2401 ret = -EPIPE;
2402 goto __end;
51840409
LR		 2403 case SNDRV_PCM_STATE_SUSPENDED:
2404 ret = -ESTRPIPE;
2405 goto __end;
1da177e4
LT		 2406 default:
2407 ret = -EBADFD;
2408 goto __end;
2409 }
2410
2411 hw_avail = snd_pcm_playback_hw_avail(runtime);
2412 if (hw_avail <= 0) {
2413 ret = 0;
2414 goto __end;
2415 }
2416 if (frames > (snd_pcm_uframes_t)hw_avail)
2417 frames = hw_avail;
1da177e4
LT		 2418 appl_ptr = runtime->control->appl_ptr - frames;
2419 if (appl_ptr < 0)
2420 appl_ptr += runtime->boundary;
2421 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2422 ret = frames;
2423 __end:
2424 snd_pcm_stream_unlock_irq(substream);
2425 return ret;
2426}
2427
877211f5
TI		 2428static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2429 snd_pcm_uframes_t frames)
1da177e4 2430{
877211f5 2431 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2432 snd_pcm_sframes_t appl_ptr;
2433 snd_pcm_sframes_t ret;
2434 snd_pcm_sframes_t hw_avail;
2435
2436 if (frames == 0)
2437 return 0;
2438
2439 snd_pcm_stream_lock_irq(substream);
2440 switch (runtime->status->state) {
2441 case SNDRV_PCM_STATE_PREPARED:
2442 case SNDRV_PCM_STATE_DRAINING:
2443 break;
2444 case SNDRV_PCM_STATE_RUNNING:
2445 if (snd_pcm_update_hw_ptr(substream) >= 0)
2446 break;
2447 /* Fall through */
2448 case SNDRV_PCM_STATE_XRUN:
2449 ret = -EPIPE;
2450 goto __end;
51840409
LR		 2451 case SNDRV_PCM_STATE_SUSPENDED:
2452 ret = -ESTRPIPE;
2453 goto __end;
1da177e4
LT		 2454 default:
2455 ret = -EBADFD;
2456 goto __end;
2457 }
2458
2459 hw_avail = snd_pcm_capture_hw_avail(runtime);
2460 if (hw_avail <= 0) {
2461 ret = 0;
2462 goto __end;
2463 }
2464 if (frames > (snd_pcm_uframes_t)hw_avail)
2465 frames = hw_avail;
1da177e4
LT		 2466 appl_ptr = runtime->control->appl_ptr - frames;
2467 if (appl_ptr < 0)
2468 appl_ptr += runtime->boundary;
2469 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2470 ret = frames;
2471 __end:
2472 snd_pcm_stream_unlock_irq(substream);
2473 return ret;
2474}
2475
877211f5
TI		 2476static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2477 snd_pcm_uframes_t frames)
1da177e4 2478{
877211f5 2479 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2480 snd_pcm_sframes_t appl_ptr;
2481 snd_pcm_sframes_t ret;
2482 snd_pcm_sframes_t avail;
2483
2484 if (frames == 0)
2485 return 0;
2486
2487 snd_pcm_stream_lock_irq(substream);
2488 switch (runtime->status->state) {
2489 case SNDRV_PCM_STATE_PREPARED:
2490 case SNDRV_PCM_STATE_PAUSED:
2491 break;
2492 case SNDRV_PCM_STATE_DRAINING:
2493 case SNDRV_PCM_STATE_RUNNING:
2494 if (snd_pcm_update_hw_ptr(substream) >= 0)
2495 break;
2496 /* Fall through */
2497 case SNDRV_PCM_STATE_XRUN:
2498 ret = -EPIPE;
2499 goto __end;
51840409
LR		 2500 case SNDRV_PCM_STATE_SUSPENDED:
2501 ret = -ESTRPIPE;
2502 goto __end;
1da177e4
LT		 2503 default:
2504 ret = -EBADFD;
2505 goto __end;
2506 }
2507
2508 avail = snd_pcm_playback_avail(runtime);
2509 if (avail <= 0) {
2510 ret = 0;
2511 goto __end;
2512 }
2513 if (frames > (snd_pcm_uframes_t)avail)
2514 frames = avail;
1da177e4
LT		 2515 appl_ptr = runtime->control->appl_ptr + frames;
2516 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2517 appl_ptr -= runtime->boundary;
2518 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2519 ret = frames;
2520 __end:
2521 snd_pcm_stream_unlock_irq(substream);
2522 return ret;
2523}
2524
877211f5
TI		 2525static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2526 snd_pcm_uframes_t frames)
1da177e4 2527{
877211f5 2528 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2529 snd_pcm_sframes_t appl_ptr;
2530 snd_pcm_sframes_t ret;
2531 snd_pcm_sframes_t avail;
2532
2533 if (frames == 0)
2534 return 0;
2535
2536 snd_pcm_stream_lock_irq(substream);
2537 switch (runtime->status->state) {
2538 case SNDRV_PCM_STATE_PREPARED:
2539 case SNDRV_PCM_STATE_DRAINING:
2540 case SNDRV_PCM_STATE_PAUSED:
2541 break;
2542 case SNDRV_PCM_STATE_RUNNING:
2543 if (snd_pcm_update_hw_ptr(substream) >= 0)
2544 break;
2545 /* Fall through */
2546 case SNDRV_PCM_STATE_XRUN:
2547 ret = -EPIPE;
2548 goto __end;
51840409
LR		 2549 case SNDRV_PCM_STATE_SUSPENDED:
2550 ret = -ESTRPIPE;
2551 goto __end;
1da177e4
LT		 2552 default:
2553 ret = -EBADFD;
2554 goto __end;
2555 }
2556
2557 avail = snd_pcm_capture_avail(runtime);
2558 if (avail <= 0) {
2559 ret = 0;
2560 goto __end;
2561 }
2562 if (frames > (snd_pcm_uframes_t)avail)
2563 frames = avail;
1da177e4
LT		 2564 appl_ptr = runtime->control->appl_ptr + frames;
2565 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2566 appl_ptr -= runtime->boundary;
2567 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2568 ret = frames;
2569 __end:
2570 snd_pcm_stream_unlock_irq(substream);
2571 return ret;
2572}
2573
877211f5 2574static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2575{
877211f5 2576 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2577 int err;
2578
2579 snd_pcm_stream_lock_irq(substream);
2580 switch (runtime->status->state) {
2581 case SNDRV_PCM_STATE_DRAINING:
2582 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2583 goto __badfd;
1f96153b 2584 /* Fall through */
1da177e4
LT		 2585 case SNDRV_PCM_STATE_RUNNING:
2586 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2587 break;
2588 /* Fall through */
2589 case SNDRV_PCM_STATE_PREPARED:
2590 case SNDRV_PCM_STATE_SUSPENDED:
2591 err = 0;
2592 break;
2593 case SNDRV_PCM_STATE_XRUN:
2594 err = -EPIPE;
2595 break;
2596 default:
2597 __badfd:
2598 err = -EBADFD;
2599 break;
2600 }
2601 snd_pcm_stream_unlock_irq(substream);
2602 return err;
2603}
2604
877211f5
TI		 2605static int snd_pcm_delay(struct snd_pcm_substream *substream,
2606 snd_pcm_sframes_t __user *res)
1da177e4 2607{
877211f5 2608 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2609 int err;
2610 snd_pcm_sframes_t n = 0;
2611
2612 snd_pcm_stream_lock_irq(substream);
2613 switch (runtime->status->state) {
2614 case SNDRV_PCM_STATE_DRAINING:
2615 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2616 goto __badfd;
1f96153b 2617 /* Fall through */
1da177e4
LT		 2618 case SNDRV_PCM_STATE_RUNNING:
2619 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2620 break;
2621 /* Fall through */
2622 case SNDRV_PCM_STATE_PREPARED:
2623 case SNDRV_PCM_STATE_SUSPENDED:
2624 err = 0;
2625 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2626 n = snd_pcm_playback_hw_avail(runtime);
2627 else
2628 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2629 n += runtime->delay;
1da177e4
LT		 2630 break;
2631 case SNDRV_PCM_STATE_XRUN:
2632 err = -EPIPE;
2633 break;
2634 default:
2635 __badfd:
2636 err = -EBADFD;
2637 break;
2638 }
2639 snd_pcm_stream_unlock_irq(substream);
2640 if (!err)
2641 if (put_user(n, res))
2642 err = -EFAULT;
2643 return err;
2644}
2645
877211f5
TI		 2646static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2647 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2648{
877211f5
TI		 2649 struct snd_pcm_runtime *runtime = substream->runtime;
2650 struct snd_pcm_sync_ptr sync_ptr;
2651 volatile struct snd_pcm_mmap_status *status;
2652 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2653 int err;
2654
2655 memset(&sync_ptr, 0, sizeof(sync_ptr));
2656 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2657 return -EFAULT;
877211f5 2658 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2659 return -EFAULT;
2660 status = runtime->status;
2661 control = runtime->control;
2662 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2663 err = snd_pcm_hwsync(substream);
2664 if (err < 0)
2665 return err;
2666 }
2667 snd_pcm_stream_lock_irq(substream);
2668 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2669 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2670 else
2671 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2672 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2673 control->avail_min = sync_ptr.c.control.avail_min;
2674 else
2675 sync_ptr.c.control.avail_min = control->avail_min;
2676 sync_ptr.s.status.state = status->state;
2677 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2678 sync_ptr.s.status.tstamp = status->tstamp;
2679 sync_ptr.s.status.suspended_state = status->suspended_state;
2680 snd_pcm_stream_unlock_irq(substream);
2681 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2682 return -EFAULT;
2683 return 0;
2684}
b751eef1
JK		 2685
2686static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2687{
2688 struct snd_pcm_runtime *runtime = substream->runtime;
2689 int arg;
2690
2691 if (get_user(arg, _arg))
2692 return -EFAULT;
2693 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2694 return -EINVAL;
2408c219 2695 runtime->tstamp_type = arg;
b751eef1
JK		 2696 return 0;
2697}
1da177e4 2698
0df63e44
TI		 2699static int snd_pcm_common_ioctl1(struct file *file,
2700 struct snd_pcm_substream *substream,
1da177e4
LT		 2701 unsigned int cmd, void __user *arg)
2702{
1da177e4
LT		 2703 switch (cmd) {
2704 case SNDRV_PCM_IOCTL_PVERSION:
2705 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2706 case SNDRV_PCM_IOCTL_INFO:
2707 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2708 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2709 return 0;
b751eef1
JK		 2710 case SNDRV_PCM_IOCTL_TTSTAMP:
2711 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2712 case SNDRV_PCM_IOCTL_HW_REFINE:
2713 return snd_pcm_hw_refine_user(substream, arg);
2714 case SNDRV_PCM_IOCTL_HW_PARAMS:
2715 return snd_pcm_hw_params_user(substream, arg);
2716 case SNDRV_PCM_IOCTL_HW_FREE:
2717 return snd_pcm_hw_free(substream);
2718 case SNDRV_PCM_IOCTL_SW_PARAMS:
2719 return snd_pcm_sw_params_user(substream, arg);
2720 case SNDRV_PCM_IOCTL_STATUS:
2721 return snd_pcm_status_user(substream, arg);
2722 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2723 return snd_pcm_channel_info_user(substream, arg);
2724 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2725 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2726 case SNDRV_PCM_IOCTL_RESET:
2727 return snd_pcm_reset(substream);
2728 case SNDRV_PCM_IOCTL_START:
2729 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2730 case SNDRV_PCM_IOCTL_LINK:
2731 return snd_pcm_link(substream, (int)(unsigned long) arg);
2732 case SNDRV_PCM_IOCTL_UNLINK:
2733 return snd_pcm_unlink(substream);
2734 case SNDRV_PCM_IOCTL_RESUME:
2735 return snd_pcm_resume(substream);
2736 case SNDRV_PCM_IOCTL_XRUN:
2737 return snd_pcm_xrun(substream);
2738 case SNDRV_PCM_IOCTL_HWSYNC:
2739 return snd_pcm_hwsync(substream);
2740 case SNDRV_PCM_IOCTL_DELAY:
2741 return snd_pcm_delay(substream, arg);
2742 case SNDRV_PCM_IOCTL_SYNC_PTR:
2743 return snd_pcm_sync_ptr(substream, arg);
59d48582 2744#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2745 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2746 return snd_pcm_hw_refine_old_user(substream, arg);
2747 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2748 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2749#endif
1da177e4 2750 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2751 return snd_pcm_drain(substream, file);
1da177e4
LT		 2752 case SNDRV_PCM_IOCTL_DROP:
2753 return snd_pcm_drop(substream);
e661d0dd
TI		 2754 case SNDRV_PCM_IOCTL_PAUSE:
2755 {
2756 int res;
2757 snd_pcm_stream_lock_irq(substream);
2758 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2759 snd_pcm_stream_unlock_irq(substream);
2760 return res;
2761 }
1da177e4 2762 }
09e56df8 2763 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
1da177e4
LT		 2764 return -ENOTTY;
2765}
2766
0df63e44
TI		 2767static int snd_pcm_playback_ioctl1(struct file *file,
2768 struct snd_pcm_substream *substream,
1da177e4
LT		 2769 unsigned int cmd, void __user *arg)
2770{
7eaa943c
TI		 2771 if (snd_BUG_ON(!substream))
2772 return -ENXIO;
2773 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2774 return -EINVAL;
1da177e4
LT		 2775 switch (cmd) {
2776 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2777 {
877211f5
TI		 2778 struct snd_xferi xferi;
2779 struct snd_xferi __user *_xferi = arg;
2780 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2781 snd_pcm_sframes_t result;
2782 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2783 return -EBADFD;
2784 if (put_user(0, &_xferi->result))
2785 return -EFAULT;
2786 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2787 return -EFAULT;
2788 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2789 __put_user(result, &_xferi->result);
2790 return result < 0 ? result : 0;
2791 }
2792 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2793 {
877211f5
TI		 2794 struct snd_xfern xfern;
2795 struct snd_xfern __user *_xfern = arg;
2796 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2797 void __user **bufs;
2798 snd_pcm_sframes_t result;
2799 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2800 return -EBADFD;
2801 if (runtime->channels > 128)
2802 return -EINVAL;
2803 if (put_user(0, &_xfern->result))
2804 return -EFAULT;
2805 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2806 return -EFAULT;
ef44a1ec
LZ		 2807
2808 bufs = memdup_user(xfern.bufs,
2809 sizeof(void *) * runtime->channels);
2810 if (IS_ERR(bufs))
2811 return PTR_ERR(bufs);
1da177e4
LT		 2812 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2813 kfree(bufs);
2814 __put_user(result, &_xfern->result);
2815 return result < 0 ? result : 0;
2816 }
2817 case SNDRV_PCM_IOCTL_REWIND:
2818 {
2819 snd_pcm_uframes_t frames;
2820 snd_pcm_uframes_t __user *_frames = arg;
2821 snd_pcm_sframes_t result;
2822 if (get_user(frames, _frames))
2823 return -EFAULT;
2824 if (put_user(0, _frames))
2825 return -EFAULT;
2826 result = snd_pcm_playback_rewind(substream, frames);
2827 __put_user(result, _frames);
2828 return result < 0 ? result : 0;
2829 }
2830 case SNDRV_PCM_IOCTL_FORWARD:
2831 {
2832 snd_pcm_uframes_t frames;
2833 snd_pcm_uframes_t __user *_frames = arg;
2834 snd_pcm_sframes_t result;
2835 if (get_user(frames, _frames))
2836 return -EFAULT;
2837 if (put_user(0, _frames))
2838 return -EFAULT;
2839 result = snd_pcm_playback_forward(substream, frames);
2840 __put_user(result, _frames);
2841 return result < 0 ? result : 0;
2842 }
1da177e4 2843 }
0df63e44 2844 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2845}
2846
0df63e44
TI		 2847static int snd_pcm_capture_ioctl1(struct file *file,
2848 struct snd_pcm_substream *substream,
1da177e4
LT		 2849 unsigned int cmd, void __user *arg)
2850{
7eaa943c
TI		 2851 if (snd_BUG_ON(!substream))
2852 return -ENXIO;
2853 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2854 return -EINVAL;
1da177e4
LT		 2855 switch (cmd) {
2856 case SNDRV_PCM_IOCTL_READI_FRAMES:
2857 {
877211f5
TI		 2858 struct snd_xferi xferi;
2859 struct snd_xferi __user *_xferi = arg;
2860 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2861 snd_pcm_sframes_t result;
2862 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2863 return -EBADFD;
2864 if (put_user(0, &_xferi->result))
2865 return -EFAULT;
2866 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2867 return -EFAULT;
2868 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2869 __put_user(result, &_xferi->result);
2870 return result < 0 ? result : 0;
2871 }
2872 case SNDRV_PCM_IOCTL_READN_FRAMES:
2873 {
877211f5
TI		 2874 struct snd_xfern xfern;
2875 struct snd_xfern __user *_xfern = arg;
2876 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2877 void *bufs;
2878 snd_pcm_sframes_t result;
2879 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2880 return -EBADFD;
2881 if (runtime->channels > 128)
2882 return -EINVAL;
2883 if (put_user(0, &_xfern->result))
2884 return -EFAULT;
2885 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2886 return -EFAULT;
ef44a1ec
LZ		 2887
2888 bufs = memdup_user(xfern.bufs,
2889 sizeof(void *) * runtime->channels);
2890 if (IS_ERR(bufs))
2891 return PTR_ERR(bufs);
1da177e4
LT		 2892 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2893 kfree(bufs);
2894 __put_user(result, &_xfern->result);
2895 return result < 0 ? result : 0;
2896 }
2897 case SNDRV_PCM_IOCTL_REWIND:
2898 {
2899 snd_pcm_uframes_t frames;
2900 snd_pcm_uframes_t __user *_frames = arg;
2901 snd_pcm_sframes_t result;
2902 if (get_user(frames, _frames))
2903 return -EFAULT;
2904 if (put_user(0, _frames))
2905 return -EFAULT;
2906 result = snd_pcm_capture_rewind(substream, frames);
2907 __put_user(result, _frames);
2908 return result < 0 ? result : 0;
2909 }
2910 case SNDRV_PCM_IOCTL_FORWARD:
2911 {
2912 snd_pcm_uframes_t frames;
2913 snd_pcm_uframes_t __user *_frames = arg;
2914 snd_pcm_sframes_t result;
2915 if (get_user(frames, _frames))
2916 return -EFAULT;
2917 if (put_user(0, _frames))
2918 return -EFAULT;
2919 result = snd_pcm_capture_forward(substream, frames);
2920 __put_user(result, _frames);
2921 return result < 0 ? result : 0;
2922 }
2923 }
0df63e44 2924 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2925}
2926
877211f5
TI		 2927static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2928 unsigned long arg)
1da177e4 2929{
877211f5 2930 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2931
2932 pcm_file = file->private_data;
2933
2934 if (((cmd >> 8) & 0xff) != 'A')
2935 return -ENOTTY;
2936
0df63e44
TI		 2937 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2938 (void __user *)arg);
1da177e4
LT		 2939}
2940
877211f5
TI		 2941static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2942 unsigned long arg)
1da177e4 2943{
877211f5 2944 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2945
2946 pcm_file = file->private_data;
2947
2948 if (((cmd >> 8) & 0xff) != 'A')
2949 return -ENOTTY;
2950
0df63e44
TI		 2951 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2952 (void __user *)arg);
1da177e4
LT		 2953}
2954
bf1bbb5a
TI		 2955int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2956 unsigned int cmd, void *arg)
1da177e4
LT		 2957{
2958 mm_segment_t fs;
2959 int result;
2960
2961 fs = snd_enter_user();
1da177e4
LT		 2962 switch (substream->stream) {
2963 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2964 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2965 (void __user *)arg);
bf1bbb5a 2966 break;
1da177e4 2967 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2968 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2969 (void __user *)arg);
bf1bbb5a 2970 break;
1da177e4 2971 default:
bf1bbb5a
TI		 2972 result = -EINVAL;
2973 break;
1da177e4 2974 }
bf1bbb5a
TI		 2975 snd_leave_user(fs);
2976 return result;
1da177e4
LT		 2977}
2978
e88e8ae6
TI		 2979EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2980
877211f5
TI		 2981static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2982 loff_t * offset)
1da177e4 2983{
877211f5
TI		 2984 struct snd_pcm_file *pcm_file;
2985 struct snd_pcm_substream *substream;
2986 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2987 snd_pcm_sframes_t result;
2988
2989 pcm_file = file->private_data;
2990 substream = pcm_file->substream;
7eaa943c
TI		 2991 if (PCM_RUNTIME_CHECK(substream))
2992 return -ENXIO;
1da177e4
LT		 2993 runtime = substream->runtime;
2994 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2995 return -EBADFD;
2996 if (!frame_aligned(runtime, count))
2997 return -EINVAL;
2998 count = bytes_to_frames(runtime, count);
2999 result = snd_pcm_lib_read(substream, buf, count);
3000 if (result > 0)
3001 result = frames_to_bytes(runtime, result);
3002 return result;
3003}
3004
877211f5
TI		 3005static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3006 size_t count, loff_t * offset)
1da177e4 3007{
877211f5
TI		 3008 struct snd_pcm_file *pcm_file;
3009 struct snd_pcm_substream *substream;
3010 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3011 snd_pcm_sframes_t result;
3012
3013 pcm_file = file->private_data;
3014 substream = pcm_file->substream;
7eaa943c
TI		 3015 if (PCM_RUNTIME_CHECK(substream))
3016 return -ENXIO;
1da177e4 3017 runtime = substream->runtime;
7eaa943c
TI		 3018 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3019 return -EBADFD;
3020 if (!frame_aligned(runtime, count))
3021 return -EINVAL;
1da177e4
LT		 3022 count = bytes_to_frames(runtime, count);
3023 result = snd_pcm_lib_write(substream, buf, count);
3024 if (result > 0)
3025 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3026 return result;
3027}
3028
ee0b3e67
BP		 3029static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3030 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 3031
3032{
877211f5
TI		 3033 struct snd_pcm_file *pcm_file;
3034 struct snd_pcm_substream *substream;
3035 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3036 snd_pcm_sframes_t result;
3037 unsigned long i;
3038 void __user **bufs;
3039 snd_pcm_uframes_t frames;
3040
ee0b3e67 3041 pcm_file = iocb->ki_filp->private_data;
1da177e4 3042 substream = pcm_file->substream;
7eaa943c
TI		 3043 if (PCM_RUNTIME_CHECK(substream))
3044 return -ENXIO;
1da177e4
LT		 3045 runtime = substream->runtime;
3046 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3047 return -EBADFD;
ee0b3e67 3048 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 3049 return -EINVAL;
ee0b3e67 3050 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 3051 return -EINVAL;
ee0b3e67
BP		 3052 frames = bytes_to_samples(runtime, iov->iov_len);
3053 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 3054 if (bufs == NULL)
3055 return -ENOMEM;
ee0b3e67
BP		 3056 for (i = 0; i < nr_segs; ++i)
3057 bufs[i] = iov[i].iov_base;
1da177e4
LT		 3058 result = snd_pcm_lib_readv(substream, bufs, frames);
3059 if (result > 0)
3060 result = frames_to_bytes(runtime, result);
3061 kfree(bufs);
3062 return result;
3063}
3064
ee0b3e67
BP		 3065static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3066 unsigned long nr_segs, loff_t pos)
1da177e4 3067{
877211f5
TI		 3068 struct snd_pcm_file *pcm_file;
3069 struct snd_pcm_substream *substream;
3070 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3071 snd_pcm_sframes_t result;
3072 unsigned long i;
3073 void __user **bufs;
3074 snd_pcm_uframes_t frames;
3075
ee0b3e67 3076 pcm_file = iocb->ki_filp->private_data;
1da177e4 3077 substream = pcm_file->substream;
7eaa943c
TI		 3078 if (PCM_RUNTIME_CHECK(substream))
3079 return -ENXIO;
1da177e4 3080 runtime = substream->runtime;
7eaa943c
TI		 3081 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3082 return -EBADFD;
ee0b3e67 3083 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 3084 !frame_aligned(runtime, iov->iov_len))
3085 return -EINVAL;
ee0b3e67
BP		 3086 frames = bytes_to_samples(runtime, iov->iov_len);
3087 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 3088 if (bufs == NULL)
3089 return -ENOMEM;
ee0b3e67
BP		 3090 for (i = 0; i < nr_segs; ++i)
3091 bufs[i] = iov[i].iov_base;
1da177e4
LT		 3092 result = snd_pcm_lib_writev(substream, bufs, frames);
3093 if (result > 0)
3094 result = frames_to_bytes(runtime, result);
3095 kfree(bufs);
1da177e4
LT		 3096 return result;
3097}
3098
3099static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3100{
877211f5
TI		 3101 struct snd_pcm_file *pcm_file;
3102 struct snd_pcm_substream *substream;
3103 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3104 unsigned int mask;
3105 snd_pcm_uframes_t avail;
3106
3107 pcm_file = file->private_data;
3108
3109 substream = pcm_file->substream;
7eaa943c
TI		 3110 if (PCM_RUNTIME_CHECK(substream))
3111 return -ENXIO;
1da177e4
LT		 3112 runtime = substream->runtime;
3113
3114 poll_wait(file, &runtime->sleep, wait);
3115
3116 snd_pcm_stream_lock_irq(substream);
3117 avail = snd_pcm_playback_avail(runtime);
3118 switch (runtime->status->state) {
3119 case SNDRV_PCM_STATE_RUNNING:
3120 case SNDRV_PCM_STATE_PREPARED:
3121 case SNDRV_PCM_STATE_PAUSED:
3122 if (avail >= runtime->control->avail_min) {
3123 mask = POLLOUT | POLLWRNORM;
3124 break;
3125 }
3126 /* Fall through */
3127 case SNDRV_PCM_STATE_DRAINING:
3128 mask = 0;
3129 break;
3130 default:
3131 mask = POLLOUT | POLLWRNORM | POLLERR;
3132 break;
3133 }
3134 snd_pcm_stream_unlock_irq(substream);
3135 return mask;
3136}
3137
3138static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3139{
877211f5
TI		 3140 struct snd_pcm_file *pcm_file;
3141 struct snd_pcm_substream *substream;
3142 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3143 unsigned int mask;
3144 snd_pcm_uframes_t avail;
3145
3146 pcm_file = file->private_data;
3147
3148 substream = pcm_file->substream;
7eaa943c
TI		 3149 if (PCM_RUNTIME_CHECK(substream))
3150 return -ENXIO;
1da177e4
LT		 3151 runtime = substream->runtime;
3152
3153 poll_wait(file, &runtime->sleep, wait);
3154
3155 snd_pcm_stream_lock_irq(substream);
3156 avail = snd_pcm_capture_avail(runtime);
3157 switch (runtime->status->state) {
3158 case SNDRV_PCM_STATE_RUNNING:
3159 case SNDRV_PCM_STATE_PREPARED:
3160 case SNDRV_PCM_STATE_PAUSED:
3161 if (avail >= runtime->control->avail_min) {
3162 mask = POLLIN | POLLRDNORM;
3163 break;
3164 }
3165 mask = 0;
3166 break;
3167 case SNDRV_PCM_STATE_DRAINING:
3168 if (avail > 0) {
3169 mask = POLLIN | POLLRDNORM;
3170 break;
3171 }
3172 /* Fall through */
3173 default:
3174 mask = POLLIN | POLLRDNORM | POLLERR;
3175 break;
3176 }
3177 snd_pcm_stream_unlock_irq(substream);
3178 return mask;
3179}
3180
3181/*
3182 * mmap support
3183 */
3184
3185/*
3186 * Only on coherent architectures, we can mmap the status and the control records
3187 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3188 */
3189#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3190/*
3191 * mmap status record
3192 */
3ad5afcd
NP		 3193static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3194 struct vm_fault *vmf)
1da177e4 3195{
877211f5
TI		 3196 struct snd_pcm_substream *substream = area->vm_private_data;
3197 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3198
3199 if (substream == NULL)
3ad5afcd 3200 return VM_FAULT_SIGBUS;
1da177e4 3201 runtime = substream->runtime;
3ad5afcd
NP		 3202 vmf->page = virt_to_page(runtime->status);
3203 get_page(vmf->page);
3204 return 0;
1da177e4
LT		 3205}
3206
f0f37e2f 3207static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3208{
3ad5afcd 3209 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3210};
3211
877211f5 3212static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3213 struct vm_area_struct *area)
3214{
1da177e4
LT		 3215 long size;
3216 if (!(area->vm_flags & VM_READ))
3217 return -EINVAL;
1da177e4 3218 size = area->vm_end - area->vm_start;
877211f5 3219 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3220 return -EINVAL;
3221 area->vm_ops = &snd_pcm_vm_ops_status;
3222 area->vm_private_data = substream;
314e51b9 3223 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3224 return 0;
3225}
3226
3227/*
3228 * mmap control record
3229 */
3ad5afcd
NP		 3230static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3231 struct vm_fault *vmf)
1da177e4 3232{
877211f5
TI		 3233 struct snd_pcm_substream *substream = area->vm_private_data;
3234 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3235
3236 if (substream == NULL)
3ad5afcd 3237 return VM_FAULT_SIGBUS;
1da177e4 3238 runtime = substream->runtime;
3ad5afcd
NP		 3239 vmf->page = virt_to_page(runtime->control);
3240 get_page(vmf->page);
3241 return 0;
1da177e4
LT		 3242}
3243
f0f37e2f 3244static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3245{
3ad5afcd 3246 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3247};
3248
877211f5 3249static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3250 struct vm_area_struct *area)
3251{
1da177e4
LT		 3252 long size;
3253 if (!(area->vm_flags & VM_READ))
3254 return -EINVAL;
1da177e4 3255 size = area->vm_end - area->vm_start;
877211f5 3256 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3257 return -EINVAL;
3258 area->vm_ops = &snd_pcm_vm_ops_control;
3259 area->vm_private_data = substream;
314e51b9 3260 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3261 return 0;
3262}
3263#else /* ! coherent mmap */
3264/*
3265 * don't support mmap for status and control records.
3266 */
877211f5 3267static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3268 struct vm_area_struct *area)
3269{
3270 return -ENXIO;
3271}
877211f5 3272static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3273 struct vm_area_struct *area)
3274{
3275 return -ENXIO;
3276}
3277#endif /* coherent mmap */
3278
9eb4a067
TI		 3279static inline struct page *
3280snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3281{
3282 void *vaddr = substream->runtime->dma_area + ofs;
3283 return virt_to_page(vaddr);
3284}
3285
1da177e4 3286/*
3ad5afcd 3287 * fault callback for mmapping a RAM page
1da177e4 3288 */
3ad5afcd
NP		 3289static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3290 struct vm_fault *vmf)
1da177e4 3291{
877211f5
TI		 3292 struct snd_pcm_substream *substream = area->vm_private_data;
3293 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3294 unsigned long offset;
3295 struct page * page;
1da177e4
LT		 3296 size_t dma_bytes;
3297
3298 if (substream == NULL)
3ad5afcd 3299 return VM_FAULT_SIGBUS;
1da177e4 3300 runtime = substream->runtime;
3ad5afcd 3301 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3302 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3303 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3304 return VM_FAULT_SIGBUS;
9eb4a067 3305 if (substream->ops->page)
1da177e4 3306 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3307 else
3308 page = snd_pcm_default_page_ops(substream, offset);
3309 if (!page)
3310 return VM_FAULT_SIGBUS;
b5810039 3311 get_page(page);
3ad5afcd
NP		 3312 vmf->page = page;
3313 return 0;
1da177e4
LT		 3314}
3315
657b1989
TI		 3316static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3317 .open = snd_pcm_mmap_data_open,
3318 .close = snd_pcm_mmap_data_close,
3319};
3320
3321static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3322 .open = snd_pcm_mmap_data_open,
3323 .close = snd_pcm_mmap_data_close,
3ad5afcd 3324 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3325};
3326
3327/*
3328 * mmap the DMA buffer on RAM
3329 */
30b771cf
TI		 3330
3331/**
3332 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3333 * @substream: PCM substream
3334 * @area: VMA
3335 *
3336 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3337 * this function is invoked implicitly.
3338 */
18a2b962
TI		 3339int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3340 struct vm_area_struct *area)
1da177e4 3341{
314e51b9 3342 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3343#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3344 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3345 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3346 return remap_pfn_range(area, area->vm_start,
3347 substream->dma_buffer.addr >> PAGE_SHIFT,
3348 area->vm_end - area->vm_start, area->vm_page_prot);
3349 }
a5606f85 3350#endif /* CONFIG_GENERIC_ALLOCATOR */
49d776ff 3351#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
657b1989
TI		 3352 if (!substream->ops->page &&
3353 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3354 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3355 area,
3356 substream->runtime->dma_area,
3357 substream->runtime->dma_addr,
3358 area->vm_end - area->vm_start);
49d776ff 3359#endif /* CONFIG_X86 */
657b1989
TI		 3360 /* mmap with fault handler */
3361 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3362 return 0;
3363}
18a2b962 3364EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3365
3366/*
3367 * mmap the DMA buffer on I/O memory area
3368 */
3369#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3370/**
3371 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3372 * @substream: PCM substream
3373 * @area: VMA
3374 *
3375 * When your hardware uses the iomapped pages as the hardware buffer and
3376 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3377 * is supposed to work only on limited architectures.
3378 */
877211f5
TI		 3379int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3380 struct vm_area_struct *area)
1da177e4 3381{
0fe09a45 3382 struct snd_pcm_runtime *runtime = substream->runtime;;
1da177e4 3383
1da177e4 3384 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3385 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3386}
e88e8ae6
TI		 3387
3388EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3389#endif /* SNDRV_PCM_INFO_MMAP */
3390
3391/*
3392 * mmap DMA buffer
3393 */
877211f5 3394int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3395 struct vm_area_struct *area)
3396{
877211f5 3397 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3398 long size;
3399 unsigned long offset;
3400 size_t dma_bytes;
657b1989 3401 int err;
1da177e4
LT		 3402
3403 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3404 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3405 return -EINVAL;
3406 } else {
3407 if (!(area->vm_flags & VM_READ))
3408 return -EINVAL;
3409 }
3410 runtime = substream->runtime;
1da177e4
LT		 3411 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3412 return -EBADFD;
3413 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3414 return -ENXIO;
3415 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3416 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3417 return -EINVAL;
3418 size = area->vm_end - area->vm_start;
3419 offset = area->vm_pgoff << PAGE_SHIFT;
3420 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3421 if ((size_t)size > dma_bytes)
3422 return -EINVAL;
3423 if (offset > dma_bytes - size)
3424 return -EINVAL;
3425
657b1989
TI		 3426 area->vm_ops = &snd_pcm_vm_ops_data;
3427 area->vm_private_data = substream;
1da177e4 3428 if (substream->ops->mmap)
657b1989 3429 err = substream->ops->mmap(substream, area);
1da177e4 3430 else
18a2b962 3431 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3432 if (!err)
3433 atomic_inc(&substream->mmap_count);
3434 return err;
1da177e4
LT		 3435}
3436
e88e8ae6
TI		 3437EXPORT_SYMBOL(snd_pcm_mmap_data);
3438
1da177e4
LT		 3439static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3440{
877211f5
TI		 3441 struct snd_pcm_file * pcm_file;
3442 struct snd_pcm_substream *substream;
1da177e4
LT		 3443 unsigned long offset;
3444
3445 pcm_file = file->private_data;
3446 substream = pcm_file->substream;
7eaa943c
TI		 3447 if (PCM_RUNTIME_CHECK(substream))
3448 return -ENXIO;
1da177e4
LT		 3449
3450 offset = area->vm_pgoff << PAGE_SHIFT;
3451 switch (offset) {
3452 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3453 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3454 return -ENXIO;
3455 return snd_pcm_mmap_status(substream, file, area);
3456 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3457 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3458 return -ENXIO;
3459 return snd_pcm_mmap_control(substream, file, area);
3460 default:
3461 return snd_pcm_mmap_data(substream, file, area);
3462 }
3463 return 0;
3464}
3465
3466static int snd_pcm_fasync(int fd, struct file * file, int on)
3467{
877211f5
TI		 3468 struct snd_pcm_file * pcm_file;
3469 struct snd_pcm_substream *substream;
3470 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3471
3472 pcm_file = file->private_data;
3473 substream = pcm_file->substream;
7eaa943c 3474 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3475 return -ENXIO;
1da177e4 3476 runtime = substream->runtime;
d05468b7 3477 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3478}
3479
3480/*
3481 * ioctl32 compat
3482 */
3483#ifdef CONFIG_COMPAT
3484#include "pcm_compat.c"
3485#else
3486#define snd_pcm_ioctl_compat NULL
3487#endif
3488
3489/*
3490 * To be removed helpers to keep binary compatibility
3491 */
3492
59d48582 3493#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3494#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3495#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3496
877211f5
TI		 3497static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3498 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3499{
3500 unsigned int i;
3501
3502 memset(params, 0, sizeof(*params));
3503 params->flags = oparams->flags;
3504 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3505 params->masks[i].bits[0] = oparams->masks[i];
3506 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3507 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3508 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3509 params->info = oparams->info;
3510 params->msbits = oparams->msbits;
3511 params->rate_num = oparams->rate_num;
3512 params->rate_den = oparams->rate_den;
3513 params->fifo_size = oparams->fifo_size;
3514}
3515
877211f5
TI		 3516static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3517 struct snd_pcm_hw_params *params)
1da177e4
LT		 3518{
3519 unsigned int i;
3520
3521 memset(oparams, 0, sizeof(*oparams));
3522 oparams->flags = params->flags;
3523 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3524 oparams->masks[i] = params->masks[i].bits[0];
3525 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3526 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3527 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3528 oparams->info = params->info;
3529 oparams->msbits = params->msbits;
3530 oparams->rate_num = params->rate_num;
3531 oparams->rate_den = params->rate_den;
3532 oparams->fifo_size = params->fifo_size;
3533}
3534
877211f5
TI		 3535static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3536 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3537{
877211f5
TI		 3538 struct snd_pcm_hw_params *params;
3539 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3540 int err;
3541
3542 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3543 if (!params)
3544 return -ENOMEM;
1da177e4 3545
ef44a1ec
LZ		 3546 oparams = memdup_user(_oparams, sizeof(*oparams));
3547 if (IS_ERR(oparams)) {
3548 err = PTR_ERR(oparams);
1da177e4
LT		 3549 goto out;
3550 }
3551 snd_pcm_hw_convert_from_old_params(params, oparams);
3552 err = snd_pcm_hw_refine(substream, params);
3553 snd_pcm_hw_convert_to_old_params(oparams, params);
3554 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3555 if (!err)
3556 err = -EFAULT;
3557 }
ef44a1ec
LZ		 3558
3559 kfree(oparams);
1da177e4
LT		 3560out:
3561 kfree(params);
1da177e4
LT		 3562 return err;
3563}
3564
877211f5
TI		 3565static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3566 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3567{
877211f5
TI		 3568 struct snd_pcm_hw_params *params;
3569 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3570 int err;
3571
3572 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3573 if (!params)
3574 return -ENOMEM;
3575
3576 oparams = memdup_user(_oparams, sizeof(*oparams));
3577 if (IS_ERR(oparams)) {
3578 err = PTR_ERR(oparams);
1da177e4
LT		 3579 goto out;
3580 }
3581 snd_pcm_hw_convert_from_old_params(params, oparams);
3582 err = snd_pcm_hw_params(substream, params);
3583 snd_pcm_hw_convert_to_old_params(oparams, params);
3584 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3585 if (!err)
3586 err = -EFAULT;
3587 }
ef44a1ec
LZ		 3588
3589 kfree(oparams);
1da177e4
LT		 3590out:
3591 kfree(params);
1da177e4
LT		 3592 return err;
3593}
59d48582 3594#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3595
7003609b 3596#ifndef CONFIG_MMU
55c63bd2
DG		 3597static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3598 unsigned long addr,
3599 unsigned long len,
3600 unsigned long pgoff,
3601 unsigned long flags)
3602{
3603 struct snd_pcm_file *pcm_file = file->private_data;
3604 struct snd_pcm_substream *substream = pcm_file->substream;
3605 struct snd_pcm_runtime *runtime = substream->runtime;
3606 unsigned long offset = pgoff << PAGE_SHIFT;
3607
3608 switch (offset) {
3609 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3610 return (unsigned long)runtime->status;
3611 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3612 return (unsigned long)runtime->control;
3613 default:
3614 return (unsigned long)runtime->dma_area + offset;
3615 }
7003609b
CC		 3616}
3617#else
55c63bd2 3618# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3619#endif
3620
1da177e4
LT		 3621/*
3622 * Register section
3623 */
3624
9c2e08c5 3625const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3626 {
2af677fc
CL		 3627 .owner = THIS_MODULE,
3628 .write = snd_pcm_write,
ee0b3e67 3629 .aio_write = snd_pcm_aio_write,
f87135f5 3630 .open = snd_pcm_playback_open,
2af677fc 3631 .release = snd_pcm_release,
02f4865f 3632 .llseek = no_llseek,
2af677fc
CL		 3633 .poll = snd_pcm_playback_poll,
3634 .unlocked_ioctl = snd_pcm_playback_ioctl,
3635 .compat_ioctl = snd_pcm_ioctl_compat,
3636 .mmap = snd_pcm_mmap,
3637 .fasync = snd_pcm_fasync,
55c63bd2 3638 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3639 },
3640 {
2af677fc
CL		 3641 .owner = THIS_MODULE,
3642 .read = snd_pcm_read,
ee0b3e67 3643 .aio_read = snd_pcm_aio_read,
f87135f5 3644 .open = snd_pcm_capture_open,
2af677fc 3645 .release = snd_pcm_release,
02f4865f 3646 .llseek = no_llseek,
2af677fc
CL		 3647 .poll = snd_pcm_capture_poll,
3648 .unlocked_ioctl = snd_pcm_capture_ioctl,
3649 .compat_ioctl = snd_pcm_ioctl_compat,
3650 .mmap = snd_pcm_mmap,
3651 .fasync = snd_pcm_fasync,
55c63bd2 3652 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3653 }
3654};