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ALSA: pcm_lib - cleanup & merge hw_ptr update functions
[mirror_ubuntu-artful-kernel.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>
1da177e4
LT		 23#include <linux/file.h>
24#include <linux/slab.h>
2db9f0a3 25#include <linux/smp_lock.h>
1da177e4 26#include <linux/time.h>
f011e2e2 27#include <linux/pm_qos_params.h>
1da177e4 28#include <linux/uio.h>
657b1989 29#include <linux/dma-mapping.h>
1da177e4
LT		 30#include <sound/core.h>
31#include <sound/control.h>
32#include <sound/info.h>
33#include <sound/pcm.h>
34#include <sound/pcm_params.h>
35#include <sound/timer.h>
36#include <sound/minors.h>
37#include <asm/io.h>
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
74DEFINE_RWLOCK(snd_pcm_link_rwlock);
e88e8ae6 75EXPORT_SYMBOL(snd_pcm_link_rwlock);
1da177e4 76
e88e8ae6 77static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4
LT		 78
79static inline mm_segment_t snd_enter_user(void)
80{
81 mm_segment_t fs = get_fs();
82 set_fs(get_ds());
83 return fs;
84}
85
86static inline void snd_leave_user(mm_segment_t fs)
87{
88 set_fs(fs);
89}
90
91
92
877211f5 93int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 94{
877211f5
TI		 95 struct snd_pcm_runtime *runtime;
96 struct snd_pcm *pcm = substream->pcm;
97 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 98
1da177e4
LT		 99 memset(info, 0, sizeof(*info));
100 info->card = pcm->card->number;
101 info->device = pcm->device;
102 info->stream = substream->stream;
103 info->subdevice = substream->number;
104 strlcpy(info->id, pcm->id, sizeof(info->id));
105 strlcpy(info->name, pcm->name, sizeof(info->name));
106 info->dev_class = pcm->dev_class;
107 info->dev_subclass = pcm->dev_subclass;
108 info->subdevices_count = pstr->substream_count;
109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110 strlcpy(info->subname, substream->name, sizeof(info->subname));
111 runtime = substream->runtime;
112 /* AB: FIXME!!! This is definitely nonsense */
113 if (runtime) {
114 info->sync = runtime->sync;
115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116 }
117 return 0;
118}
119
877211f5
TI		 120int snd_pcm_info_user(struct snd_pcm_substream *substream,
121 struct snd_pcm_info __user * _info)
1da177e4 122{
877211f5 123 struct snd_pcm_info *info;
1da177e4
LT		 124 int err;
125
126 info = kmalloc(sizeof(*info), GFP_KERNEL);
127 if (! info)
128 return -ENOMEM;
129 err = snd_pcm_info(substream, info);
130 if (err >= 0) {
131 if (copy_to_user(_info, info, sizeof(*info)))
132 err = -EFAULT;
133 }
134 kfree(info);
135 return err;
136}
137
138#undef RULES_DEBUG
139
140#ifdef RULES_DEBUG
141#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142char *snd_pcm_hw_param_names[] = {
143 HW_PARAM(ACCESS),
144 HW_PARAM(FORMAT),
145 HW_PARAM(SUBFORMAT),
146 HW_PARAM(SAMPLE_BITS),
147 HW_PARAM(FRAME_BITS),
148 HW_PARAM(CHANNELS),
149 HW_PARAM(RATE),
150 HW_PARAM(PERIOD_TIME),
151 HW_PARAM(PERIOD_SIZE),
152 HW_PARAM(PERIOD_BYTES),
153 HW_PARAM(PERIODS),
154 HW_PARAM(BUFFER_TIME),
155 HW_PARAM(BUFFER_SIZE),
156 HW_PARAM(BUFFER_BYTES),
157 HW_PARAM(TICK_TIME),
158};
159#endif
160
877211f5
TI		 161int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params)
1da177e4
LT		 163{
164 unsigned int k;
877211f5
TI		 165 struct snd_pcm_hardware *hw;
166 struct snd_interval *i = NULL;
167 struct snd_mask *m = NULL;
168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 169 unsigned int rstamps[constrs->rules_num];
170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171 unsigned int stamp = 2;
172 int changed, again;
173
174 params->info = 0;
175 params->fifo_size = 0;
176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177 params->msbits = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179 params->rate_num = 0;
180 params->rate_den = 0;
181 }
182
183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184 m = hw_param_mask(params, k);
185 if (snd_mask_empty(m))
186 return -EINVAL;
187 if (!(params->rmask & (1 << k)))
188 continue;
189#ifdef RULES_DEBUG
006de267 190 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192#endif
193 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194#ifdef RULES_DEBUG
195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196#endif
197 if (changed)
198 params->cmask |= 1 << k;
199 if (changed < 0)
200 return changed;
201 }
202
203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204 i = hw_param_interval(params, k);
205 if (snd_interval_empty(i))
206 return -EINVAL;
207 if (!(params->rmask & (1 << k)))
208 continue;
209#ifdef RULES_DEBUG
006de267 210 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 211 if (i->empty)
212 printk("empty");
213 else
214 printk("%c%u %u%c",
215 i->openmin ? '(' : '[', i->min,
216 i->max, i->openmax ? ')' : ']');
217 printk(" -> ");
218#endif
219 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220#ifdef RULES_DEBUG
221 if (i->empty)
222 printk("empty\n");
223 else
224 printk("%c%u %u%c\n",
225 i->openmin ? '(' : '[', i->min,
226 i->max, i->openmax ? ')' : ']');
227#endif
228 if (changed)
229 params->cmask |= 1 << k;
230 if (changed < 0)
231 return changed;
232 }
233
234 for (k = 0; k < constrs->rules_num; k++)
235 rstamps[k] = 0;
236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238 do {
239 again = 0;
240 for (k = 0; k < constrs->rules_num; k++) {
877211f5 241 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 242 unsigned int d;
243 int doit = 0;
244 if (r->cond && !(r->cond & params->flags))
245 continue;
246 for (d = 0; r->deps[d] >= 0; d++) {
247 if (vstamps[r->deps[d]] > rstamps[k]) {
248 doit = 1;
249 break;
250 }
251 }
252 if (!doit)
253 continue;
254#ifdef RULES_DEBUG
006de267 255 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
1da177e4
LT		 256 if (r->var >= 0) {
257 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258 if (hw_is_mask(r->var)) {
259 m = hw_param_mask(params, r->var);
260 printk("%x", *m->bits);
261 } else {
262 i = hw_param_interval(params, r->var);
263 if (i->empty)
264 printk("empty");
265 else
266 printk("%c%u %u%c",
267 i->openmin ? '(' : '[', i->min,
268 i->max, i->openmax ? ')' : ']');
269 }
270 }
271#endif
272 changed = r->func(params, r);
273#ifdef RULES_DEBUG
274 if (r->var >= 0) {
275 printk(" -> ");
276 if (hw_is_mask(r->var))
277 printk("%x", *m->bits);
278 else {
279 if (i->empty)
280 printk("empty");
281 else
282 printk("%c%u %u%c",
283 i->openmin ? '(' : '[', i->min,
284 i->max, i->openmax ? ')' : ']');
285 }
286 }
287 printk("\n");
288#endif
289 rstamps[k] = stamp;
290 if (changed && r->var >= 0) {
291 params->cmask |= (1 << r->var);
292 vstamps[r->var] = stamp;
293 again = 1;
294 }
295 if (changed < 0)
296 return changed;
297 stamp++;
298 }
299 } while (again);
300 if (!params->msbits) {
301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302 if (snd_interval_single(i))
303 params->msbits = snd_interval_value(i);
304 }
305
306 if (!params->rate_den) {
307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308 if (snd_interval_single(i)) {
309 params->rate_num = snd_interval_value(i);
310 params->rate_den = 1;
311 }
312 }
313
314 hw = &substream->runtime->hw;
315 if (!params->info)
8bea869c
JK		 316 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
317 if (!params->fifo_size) {
318 if (snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) ==
319 snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) &&
320 snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) ==
321 snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) {
322 changed = substream->ops->ioctl(substream,
323 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 324 if (changed < 0)
8bea869c
JK		 325 return changed;
326 }
327 }
1da177e4
LT		 328 params->rmask = 0;
329 return 0;
330}
331
e88e8ae6
TI		 332EXPORT_SYMBOL(snd_pcm_hw_refine);
333
877211f5
TI		 334static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
335 struct snd_pcm_hw_params __user * _params)
1da177e4 336{
877211f5 337 struct snd_pcm_hw_params *params;
1da177e4
LT		 338 int err;
339
ef44a1ec
LZ		 340 params = memdup_user(_params, sizeof(*params));
341 if (IS_ERR(params))
342 return PTR_ERR(params);
343
1da177e4
LT		 344 err = snd_pcm_hw_refine(substream, params);
345 if (copy_to_user(_params, params, sizeof(*params))) {
346 if (!err)
347 err = -EFAULT;
348 }
ef44a1ec 349
1da177e4
LT		 350 kfree(params);
351 return err;
352}
353
9442e691
TI		 354static int period_to_usecs(struct snd_pcm_runtime *runtime)
355{
356 int usecs;
357
358 if (! runtime->rate)
359 return -1; /* invalid */
360
361 /* take 75% of period time as the deadline */
362 usecs = (750000 / runtime->rate) * runtime->period_size;
363 usecs += ((750000 % runtime->rate) * runtime->period_size) /
364 runtime->rate;
365
366 return usecs;
367}
368
877211f5
TI		 369static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
370 struct snd_pcm_hw_params *params)
1da177e4 371{
877211f5 372 struct snd_pcm_runtime *runtime;
9442e691 373 int err, usecs;
1da177e4
LT		 374 unsigned int bits;
375 snd_pcm_uframes_t frames;
376
7eaa943c
TI		 377 if (PCM_RUNTIME_CHECK(substream))
378 return -ENXIO;
1da177e4 379 runtime = substream->runtime;
1da177e4
LT		 380 snd_pcm_stream_lock_irq(substream);
381 switch (runtime->status->state) {
382 case SNDRV_PCM_STATE_OPEN:
383 case SNDRV_PCM_STATE_SETUP:
384 case SNDRV_PCM_STATE_PREPARED:
385 break;
386 default:
387 snd_pcm_stream_unlock_irq(substream);
388 return -EBADFD;
389 }
390 snd_pcm_stream_unlock_irq(substream);
391#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
392 if (!substream->oss.oss)
393#endif
9c323fcb 394 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 395 return -EBADFD;
396
397 params->rmask = ~0U;
398 err = snd_pcm_hw_refine(substream, params);
399 if (err < 0)
400 goto _error;
401
402 err = snd_pcm_hw_params_choose(substream, params);
403 if (err < 0)
404 goto _error;
405
406 if (substream->ops->hw_params != NULL) {
407 err = substream->ops->hw_params(substream, params);
408 if (err < 0)
409 goto _error;
410 }
411
412 runtime->access = params_access(params);
413 runtime->format = params_format(params);
414 runtime->subformat = params_subformat(params);
415 runtime->channels = params_channels(params);
416 runtime->rate = params_rate(params);
417 runtime->period_size = params_period_size(params);
418 runtime->periods = params_periods(params);
419 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 420 runtime->info = params->info;
421 runtime->rate_num = params->rate_num;
422 runtime->rate_den = params->rate_den;
423
424 bits = snd_pcm_format_physical_width(runtime->format);
425 runtime->sample_bits = bits;
426 bits *= runtime->channels;
427 runtime->frame_bits = bits;
428 frames = 1;
429 while (bits % 8 != 0) {
430 bits *= 2;
431 frames *= 2;
432 }
433 runtime->byte_align = bits / 8;
434 runtime->min_align = frames;
435
436 /* Default sw params */
437 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
438 runtime->period_step = 1;
1da177e4 439 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 440 runtime->start_threshold = 1;
441 runtime->stop_threshold = runtime->buffer_size;
442 runtime->silence_threshold = 0;
443 runtime->silence_size = 0;
444 runtime->boundary = runtime->buffer_size;
445 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
446 runtime->boundary *= 2;
447
448 snd_pcm_timer_resolution_change(substream);
449 runtime->status->state = SNDRV_PCM_STATE_SETUP;
9442e691 450
f011e2e2
MG		 451 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
452 substream->latency_id);
9442e691 453 if ((usecs = period_to_usecs(runtime)) >= 0)
f011e2e2
MG		 454 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
455 substream->latency_id, usecs);
1da177e4
LT		 456 return 0;
457 _error:
458 /* hardware might be unuseable from this time,
459 so we force application to retry to set
460 the correct hardware parameter settings */
461 runtime->status->state = SNDRV_PCM_STATE_OPEN;
462 if (substream->ops->hw_free != NULL)
463 substream->ops->hw_free(substream);
464 return err;
465}
466
877211f5
TI		 467static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
468 struct snd_pcm_hw_params __user * _params)
1da177e4 469{
877211f5 470 struct snd_pcm_hw_params *params;
1da177e4
LT		 471 int err;
472
ef44a1ec
LZ		 473 params = memdup_user(_params, sizeof(*params));
474 if (IS_ERR(params))
475 return PTR_ERR(params);
476
1da177e4
LT		 477 err = snd_pcm_hw_params(substream, params);
478 if (copy_to_user(_params, params, sizeof(*params))) {
479 if (!err)
480 err = -EFAULT;
481 }
ef44a1ec 482
1da177e4
LT		 483 kfree(params);
484 return err;
485}
486
877211f5 487static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 488{
877211f5 489 struct snd_pcm_runtime *runtime;
1da177e4
LT		 490 int result = 0;
491
7eaa943c
TI		 492 if (PCM_RUNTIME_CHECK(substream))
493 return -ENXIO;
1da177e4 494 runtime = substream->runtime;
1da177e4
LT		 495 snd_pcm_stream_lock_irq(substream);
496 switch (runtime->status->state) {
497 case SNDRV_PCM_STATE_SETUP:
498 case SNDRV_PCM_STATE_PREPARED:
499 break;
500 default:
501 snd_pcm_stream_unlock_irq(substream);
502 return -EBADFD;
503 }
504 snd_pcm_stream_unlock_irq(substream);
9c323fcb 505 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 506 return -EBADFD;
507 if (substream->ops->hw_free)
508 result = substream->ops->hw_free(substream);
509 runtime->status->state = SNDRV_PCM_STATE_OPEN;
f011e2e2
MG		 510 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
511 substream->latency_id);
1da177e4
LT		 512 return result;
513}
514
877211f5
TI		 515static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
516 struct snd_pcm_sw_params *params)
1da177e4 517{
877211f5 518 struct snd_pcm_runtime *runtime;
1da177e4 519
7eaa943c
TI		 520 if (PCM_RUNTIME_CHECK(substream))
521 return -ENXIO;
1da177e4 522 runtime = substream->runtime;
1da177e4
LT		 523 snd_pcm_stream_lock_irq(substream);
524 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
525 snd_pcm_stream_unlock_irq(substream);
526 return -EBADFD;
527 }
528 snd_pcm_stream_unlock_irq(substream);
529
530 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
531 return -EINVAL;
532 if (params->avail_min == 0)
533 return -EINVAL;
1da177e4
LT		 534 if (params->silence_size >= runtime->boundary) {
535 if (params->silence_threshold != 0)
536 return -EINVAL;
537 } else {
538 if (params->silence_size > params->silence_threshold)
539 return -EINVAL;
540 if (params->silence_threshold > runtime->buffer_size)
541 return -EINVAL;
542 }
543 snd_pcm_stream_lock_irq(substream);
544 runtime->tstamp_mode = params->tstamp_mode;
1da177e4
LT		 545 runtime->period_step = params->period_step;
546 runtime->control->avail_min = params->avail_min;
547 runtime->start_threshold = params->start_threshold;
548 runtime->stop_threshold = params->stop_threshold;
549 runtime->silence_threshold = params->silence_threshold;
550 runtime->silence_size = params->silence_size;
1da177e4
LT		 551 params->boundary = runtime->boundary;
552 if (snd_pcm_running(substream)) {
1da177e4
LT		 553 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
554 runtime->silence_size > 0)
555 snd_pcm_playback_silence(substream, ULONG_MAX);
556 wake_up(&runtime->sleep);
557 }
558 snd_pcm_stream_unlock_irq(substream);
559 return 0;
560}
561
877211f5
TI		 562static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
563 struct snd_pcm_sw_params __user * _params)
1da177e4 564{
877211f5 565 struct snd_pcm_sw_params params;
1da177e4
LT		 566 int err;
567 if (copy_from_user(&params, _params, sizeof(params)))
568 return -EFAULT;
569 err = snd_pcm_sw_params(substream, &params);
570 if (copy_to_user(_params, &params, sizeof(params)))
571 return -EFAULT;
572 return err;
573}
574
877211f5
TI		 575int snd_pcm_status(struct snd_pcm_substream *substream,
576 struct snd_pcm_status *status)
1da177e4 577{
877211f5 578 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 579
580 snd_pcm_stream_lock_irq(substream);
581 status->state = runtime->status->state;
582 status->suspended_state = runtime->status->suspended_state;
583 if (status->state == SNDRV_PCM_STATE_OPEN)
584 goto _end;
585 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 586 if (snd_pcm_running(substream)) {
1da177e4 587 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 588 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
589 status->tstamp = runtime->status->tstamp;
590 goto _tstamp_end;
591 }
592 }
a713b583 593 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 594 _tstamp_end:
1da177e4
LT		 595 status->appl_ptr = runtime->control->appl_ptr;
596 status->hw_ptr = runtime->status->hw_ptr;
597 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
598 status->avail = snd_pcm_playback_avail(runtime);
599 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 600 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 601 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 602 status->delay += runtime->delay;
603 } else
1da177e4
LT		 604 status->delay = 0;
605 } else {
606 status->avail = snd_pcm_capture_avail(runtime);
607 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 608 status->delay = status->avail + runtime->delay;
1da177e4
LT		 609 else
610 status->delay = 0;
611 }
612 status->avail_max = runtime->avail_max;
613 status->overrange = runtime->overrange;
614 runtime->avail_max = 0;
615 runtime->overrange = 0;
616 _end:
617 snd_pcm_stream_unlock_irq(substream);
618 return 0;
619}
620
877211f5
TI		 621static int snd_pcm_status_user(struct snd_pcm_substream *substream,
622 struct snd_pcm_status __user * _status)
1da177e4 623{
877211f5 624 struct snd_pcm_status status;
1da177e4
LT		 625 int res;
626
1da177e4
LT		 627 memset(&status, 0, sizeof(status));
628 res = snd_pcm_status(substream, &status);
629 if (res < 0)
630 return res;
631 if (copy_to_user(_status, &status, sizeof(status)))
632 return -EFAULT;
633 return 0;
634}
635
877211f5
TI		 636static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
637 struct snd_pcm_channel_info * info)
1da177e4 638{
877211f5 639 struct snd_pcm_runtime *runtime;
1da177e4
LT		 640 unsigned int channel;
641
1da177e4
LT		 642 channel = info->channel;
643 runtime = substream->runtime;
644 snd_pcm_stream_lock_irq(substream);
645 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
646 snd_pcm_stream_unlock_irq(substream);
647 return -EBADFD;
648 }
649 snd_pcm_stream_unlock_irq(substream);
650 if (channel >= runtime->channels)
651 return -EINVAL;
652 memset(info, 0, sizeof(*info));
653 info->channel = channel;
654 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
655}
656
877211f5
TI		 657static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
658 struct snd_pcm_channel_info __user * _info)
1da177e4 659{
877211f5 660 struct snd_pcm_channel_info info;
1da177e4
LT		 661 int res;
662
663 if (copy_from_user(&info, _info, sizeof(info)))
664 return -EFAULT;
665 res = snd_pcm_channel_info(substream, &info);
666 if (res < 0)
667 return res;
668 if (copy_to_user(_info, &info, sizeof(info)))
669 return -EFAULT;
670 return 0;
671}
672
877211f5 673static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 674{
877211f5 675 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 676 if (runtime->trigger_master == NULL)
677 return;
678 if (runtime->trigger_master == substream) {
b751eef1 679 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 680 } else {
681 snd_pcm_trigger_tstamp(runtime->trigger_master);
682 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
683 }
684 runtime->trigger_master = NULL;
685}
686
687struct action_ops {
877211f5
TI		 688 int (*pre_action)(struct snd_pcm_substream *substream, int state);
689 int (*do_action)(struct snd_pcm_substream *substream, int state);
690 void (*undo_action)(struct snd_pcm_substream *substream, int state);
691 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 692};
693
694/*
695 * this functions is core for handling of linked stream
696 * Note: the stream state might be changed also on failure
697 * Note2: call with calling stream lock + link lock
698 */
699static int snd_pcm_action_group(struct action_ops *ops,
877211f5 700 struct snd_pcm_substream *substream,
1da177e4
LT		 701 int state, int do_lock)
702{
877211f5
TI		 703 struct snd_pcm_substream *s = NULL;
704 struct snd_pcm_substream *s1;
1da177e4
LT		 705 int res = 0;
706
ef991b95 707 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 708 if (do_lock && s != substream)
208eee2a
FD		 709 spin_lock_nested(&s->self_group.lock,
710 SINGLE_DEPTH_NESTING);
1da177e4
LT		 711 res = ops->pre_action(s, state);
712 if (res < 0)
713 goto _unlock;
714 }
ef991b95 715 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 716 res = ops->do_action(s, state);
717 if (res < 0) {
718 if (ops->undo_action) {
ef991b95 719 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 720 if (s1 == s) /* failed stream */
721 break;
722 ops->undo_action(s1, state);
723 }
724 }
725 s = NULL; /* unlock all */
726 goto _unlock;
727 }
728 }
ef991b95 729 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 730 ops->post_action(s, state);
731 }
732 _unlock:
733 if (do_lock) {
734 /* unlock streams */
ef991b95 735 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 736 if (s1 != substream)
737 spin_unlock(&s1->self_group.lock);
738 if (s1 == s) /* end */
739 break;
740 }
741 }
742 return res;
743}
744
745/*
746 * Note: call with stream lock
747 */
748static int snd_pcm_action_single(struct action_ops *ops,
877211f5 749 struct snd_pcm_substream *substream,
1da177e4
LT		 750 int state)
751{
752 int res;
753
754 res = ops->pre_action(substream, state);
755 if (res < 0)
756 return res;
757 res = ops->do_action(substream, state);
758 if (res == 0)
759 ops->post_action(substream, state);
760 else if (ops->undo_action)
761 ops->undo_action(substream, state);
762 return res;
763}
764
765/*
766 * Note: call with stream lock
767 */
768static int snd_pcm_action(struct action_ops *ops,
877211f5 769 struct snd_pcm_substream *substream,
1da177e4
LT		 770 int state)
771{
772 int res;
773
774 if (snd_pcm_stream_linked(substream)) {
775 if (!spin_trylock(&substream->group->lock)) {
776 spin_unlock(&substream->self_group.lock);
777 spin_lock(&substream->group->lock);
778 spin_lock(&substream->self_group.lock);
779 }
780 res = snd_pcm_action_group(ops, substream, state, 1);
781 spin_unlock(&substream->group->lock);
782 } else {
783 res = snd_pcm_action_single(ops, substream, state);
784 }
785 return res;
786}
787
788/*
789 * Note: don't use any locks before
790 */
791static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 792 struct snd_pcm_substream *substream,
1da177e4
LT		 793 int state)
794{
795 int res;
796
797 read_lock_irq(&snd_pcm_link_rwlock);
798 if (snd_pcm_stream_linked(substream)) {
799 spin_lock(&substream->group->lock);
800 spin_lock(&substream->self_group.lock);
801 res = snd_pcm_action_group(ops, substream, state, 1);
802 spin_unlock(&substream->self_group.lock);
803 spin_unlock(&substream->group->lock);
804 } else {
805 spin_lock(&substream->self_group.lock);
806 res = snd_pcm_action_single(ops, substream, state);
807 spin_unlock(&substream->self_group.lock);
808 }
809 read_unlock_irq(&snd_pcm_link_rwlock);
810 return res;
811}
812
813/*
814 */
815static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 816 struct snd_pcm_substream *substream,
1da177e4
LT		 817 int state)
818{
819 int res;
820
821 down_read(&snd_pcm_link_rwsem);
822 if (snd_pcm_stream_linked(substream))
823 res = snd_pcm_action_group(ops, substream, state, 0);
824 else
825 res = snd_pcm_action_single(ops, substream, state);
826 up_read(&snd_pcm_link_rwsem);
827 return res;
828}
829
830/*
831 * start callbacks
832 */
877211f5 833static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 834{
877211f5 835 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 836 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
837 return -EBADFD;
838 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
839 !snd_pcm_playback_data(substream))
840 return -EPIPE;
841 runtime->trigger_master = substream;
842 return 0;
843}
844
877211f5 845static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 846{
847 if (substream->runtime->trigger_master != substream)
848 return 0;
849 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
850}
851
877211f5 852static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 853{
854 if (substream->runtime->trigger_master == substream)
855 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
856}
857
877211f5 858static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 859{
877211f5 860 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 861 snd_pcm_trigger_tstamp(substream);
6af3fb72 862 runtime->hw_ptr_jiffies = jiffies;
1da177e4
LT		 863 runtime->status->state = state;
864 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
865 runtime->silence_size > 0)
866 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 867 if (substream->timer)
877211f5
TI		 868 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
869 &runtime->trigger_tstamp);
1da177e4
LT		 870}
871
872static struct action_ops snd_pcm_action_start = {
873 .pre_action = snd_pcm_pre_start,
874 .do_action = snd_pcm_do_start,
875 .undo_action = snd_pcm_undo_start,
876 .post_action = snd_pcm_post_start
877};
878
879/**
1c85cc64 880 * snd_pcm_start - start all linked streams
df8db936 881 * @substream: the PCM substream instance
1da177e4 882 */
877211f5 883int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 884{
877211f5
TI		 885 return snd_pcm_action(&snd_pcm_action_start, substream,
886 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 887}
888
889/*
890 * stop callbacks
891 */
877211f5 892static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 893{
877211f5 894 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 895 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
896 return -EBADFD;
897 runtime->trigger_master = substream;
898 return 0;
899}
900
877211f5 901static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 902{
903 if (substream->runtime->trigger_master == substream &&
904 snd_pcm_running(substream))
905 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
906 return 0; /* unconditonally stop all substreams */
907}
908
877211f5 909static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 910{
877211f5 911 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 912 if (runtime->status->state != state) {
913 snd_pcm_trigger_tstamp(substream);
914 if (substream->timer)
877211f5
TI		 915 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
916 &runtime->trigger_tstamp);
1da177e4 917 runtime->status->state = state;
1da177e4
LT		 918 }
919 wake_up(&runtime->sleep);
920}
921
922static struct action_ops snd_pcm_action_stop = {
923 .pre_action = snd_pcm_pre_stop,
924 .do_action = snd_pcm_do_stop,
925 .post_action = snd_pcm_post_stop
926};
927
928/**
1c85cc64 929 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 930 * @substream: the PCM substream instance
931 * @state: PCM state after stopping the stream
1da177e4 932 *
1c85cc64 933 * The state of each stream is then changed to the given state unconditionally.
1da177e4 934 */
877211f5 935int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 936{
937 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
938}
939
e88e8ae6
TI		 940EXPORT_SYMBOL(snd_pcm_stop);
941
1da177e4 942/**
1c85cc64 943 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 944 * @substream: the PCM substream
1da177e4 945 *
1c85cc64 946 * After stopping, the state is changed to SETUP.
1da177e4
LT		 947 * Unlike snd_pcm_stop(), this affects only the given stream.
948 */
877211f5 949int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 950{
877211f5
TI		 951 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
952 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 953}
954
955/*
956 * pause callbacks
957 */
877211f5 958static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 959{
877211f5 960 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 961 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
962 return -ENOSYS;
963 if (push) {
964 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
965 return -EBADFD;
966 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
967 return -EBADFD;
968 runtime->trigger_master = substream;
969 return 0;
970}
971
877211f5 972static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 973{
974 if (substream->runtime->trigger_master != substream)
975 return 0;
6af3fb72
TI		 976 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
977 * a delta betwen the current jiffies, this gives a large enough
978 * delta, effectively to skip the check once.
979 */
980 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 981 return substream->ops->trigger(substream,
982 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
983 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
984}
985
877211f5 986static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 987{
988 if (substream->runtime->trigger_master == substream)
989 substream->ops->trigger(substream,
990 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
991 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
992}
993
877211f5 994static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 995{
877211f5 996 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 997 snd_pcm_trigger_tstamp(substream);
998 if (push) {
999 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1000 if (substream->timer)
877211f5
TI		 1001 snd_timer_notify(substream->timer,
1002 SNDRV_TIMER_EVENT_MPAUSE,
1003 &runtime->trigger_tstamp);
1da177e4
LT		 1004 wake_up(&runtime->sleep);
1005 } else {
1006 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1007 if (substream->timer)
877211f5
TI		 1008 snd_timer_notify(substream->timer,
1009 SNDRV_TIMER_EVENT_MCONTINUE,
1010 &runtime->trigger_tstamp);
1da177e4
LT		 1011 }
1012}
1013
1014static struct action_ops snd_pcm_action_pause = {
1015 .pre_action = snd_pcm_pre_pause,
1016 .do_action = snd_pcm_do_pause,
1017 .undo_action = snd_pcm_undo_pause,
1018 .post_action = snd_pcm_post_pause
1019};
1020
1021/*
1022 * Push/release the pause for all linked streams.
1023 */
877211f5 1024static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1025{
1026 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1027}
1028
1029#ifdef CONFIG_PM
1030/* suspend */
1031
877211f5 1032static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1033{
877211f5 1034 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1035 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1036 return -EBUSY;
1037 runtime->trigger_master = substream;
1038 return 0;
1039}
1040
877211f5 1041static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1042{
877211f5 1043 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1044 if (runtime->trigger_master != substream)
1045 return 0;
1046 if (! snd_pcm_running(substream))
1047 return 0;
1048 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1049 return 0; /* suspend unconditionally */
1050}
1051
877211f5 1052static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1053{
877211f5 1054 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1055 snd_pcm_trigger_tstamp(substream);
1056 if (substream->timer)
877211f5
TI		 1057 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1058 &runtime->trigger_tstamp);
1da177e4
LT		 1059 runtime->status->suspended_state = runtime->status->state;
1060 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4
LT		 1061 wake_up(&runtime->sleep);
1062}
1063
1064static struct action_ops snd_pcm_action_suspend = {
1065 .pre_action = snd_pcm_pre_suspend,
1066 .do_action = snd_pcm_do_suspend,
1067 .post_action = snd_pcm_post_suspend
1068};
1069
1070/**
1c85cc64 1071 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1072 * @substream: the PCM substream
1da177e4 1073 *
1da177e4
LT		 1074 * After this call, all streams are changed to SUSPENDED state.
1075 */
877211f5 1076int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1077{
1078 int err;
1079 unsigned long flags;
1080
603bf524
TI		 1081 if (! substream)
1082 return 0;
1083
1da177e4
LT		 1084 snd_pcm_stream_lock_irqsave(substream, flags);
1085 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1086 snd_pcm_stream_unlock_irqrestore(substream, flags);
1087 return err;
1088}
1089
e88e8ae6
TI		 1090EXPORT_SYMBOL(snd_pcm_suspend);
1091
1da177e4 1092/**
1c85cc64 1093 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1094 * @pcm: the PCM instance
1da177e4 1095 *
1da177e4
LT		 1096 * After this call, all streams are changed to SUSPENDED state.
1097 */
877211f5 1098int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1099{
877211f5 1100 struct snd_pcm_substream *substream;
1da177e4
LT		 1101 int stream, err = 0;
1102
603bf524
TI		 1103 if (! pcm)
1104 return 0;
1105
1da177e4 1106 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1107 for (substream = pcm->streams[stream].substream;
1108 substream; substream = substream->next) {
1da177e4
LT		 1109 /* FIXME: the open/close code should lock this as well */
1110 if (substream->runtime == NULL)
1111 continue;
1112 err = snd_pcm_suspend(substream);
1113 if (err < 0 && err != -EBUSY)
1114 return err;
1115 }
1116 }
1117 return 0;
1118}
1119
e88e8ae6
TI		 1120EXPORT_SYMBOL(snd_pcm_suspend_all);
1121
1da177e4
LT		 1122/* resume */
1123
877211f5 1124static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1125{
877211f5 1126 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1127 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1128 return -ENOSYS;
1129 runtime->trigger_master = substream;
1130 return 0;
1131}
1132
877211f5 1133static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1134{
877211f5 1135 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1136 if (runtime->trigger_master != substream)
1137 return 0;
1138 /* DMA not running previously? */
1139 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1140 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1141 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1142 return 0;
1143 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1144}
1145
877211f5 1146static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1147{
1148 if (substream->runtime->trigger_master == substream &&
1149 snd_pcm_running(substream))
1150 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1151}
1152
877211f5 1153static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1154{
877211f5 1155 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1156 snd_pcm_trigger_tstamp(substream);
1157 if (substream->timer)
877211f5
TI		 1158 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1159 &runtime->trigger_tstamp);
1da177e4 1160 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1161}
1162
1163static struct action_ops snd_pcm_action_resume = {
1164 .pre_action = snd_pcm_pre_resume,
1165 .do_action = snd_pcm_do_resume,
1166 .undo_action = snd_pcm_undo_resume,
1167 .post_action = snd_pcm_post_resume
1168};
1169
877211f5 1170static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1171{
877211f5 1172 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1173 int res;
1174
1175 snd_power_lock(card);
cbac4b0c 1176 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1177 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1178 snd_power_unlock(card);
1179 return res;
1180}
1181
1182#else
1183
877211f5 1184static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1185{
1186 return -ENOSYS;
1187}
1188
1189#endif /* CONFIG_PM */
1190
1191/*
1192 * xrun ioctl
1193 *
1194 * Change the RUNNING stream(s) to XRUN state.
1195 */
877211f5 1196static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1197{
877211f5
TI		 1198 struct snd_card *card = substream->pcm->card;
1199 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1200 int result;
1201
1202 snd_power_lock(card);
1203 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1204 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1205 if (result < 0)
1206 goto _unlock;
1207 }
1208
1209 snd_pcm_stream_lock_irq(substream);
1210 switch (runtime->status->state) {
1211 case SNDRV_PCM_STATE_XRUN:
1212 result = 0; /* already there */
1213 break;
1214 case SNDRV_PCM_STATE_RUNNING:
1215 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1216 break;
1217 default:
1218 result = -EBADFD;
1219 }
1220 snd_pcm_stream_unlock_irq(substream);
1221 _unlock:
1222 snd_power_unlock(card);
1223 return result;
1224}
1225
1226/*
1227 * reset ioctl
1228 */
877211f5 1229static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1230{
877211f5 1231 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1232 switch (runtime->status->state) {
1233 case SNDRV_PCM_STATE_RUNNING:
1234 case SNDRV_PCM_STATE_PREPARED:
1235 case SNDRV_PCM_STATE_PAUSED:
1236 case SNDRV_PCM_STATE_SUSPENDED:
1237 return 0;
1238 default:
1239 return -EBADFD;
1240 }
1241}
1242
877211f5 1243static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1244{
877211f5 1245 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1246 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1247 if (err < 0)
1248 return err;
1da177e4 1249 runtime->hw_ptr_base = 0;
1da177e4
LT		 1250 runtime->silence_start = runtime->status->hw_ptr;
1251 runtime->silence_filled = 0;
1252 return 0;
1253}
1254
877211f5 1255static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1256{
877211f5 1257 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1258 runtime->control->appl_ptr = runtime->status->hw_ptr;
1259 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1260 runtime->silence_size > 0)
1261 snd_pcm_playback_silence(substream, ULONG_MAX);
1262}
1263
1264static struct action_ops snd_pcm_action_reset = {
1265 .pre_action = snd_pcm_pre_reset,
1266 .do_action = snd_pcm_do_reset,
1267 .post_action = snd_pcm_post_reset
1268};
1269
877211f5 1270static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1271{
1272 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1273}
1274
1275/*
1276 * prepare ioctl
1277 */
0df63e44
TI		 1278/* we use the second argument for updating f_flags */
1279static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1280 int f_flags)
1da177e4 1281{
877211f5 1282 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1283 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1284 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1285 return -EBADFD;
1286 if (snd_pcm_running(substream))
1287 return -EBUSY;
0df63e44 1288 substream->f_flags = f_flags;
1da177e4
LT		 1289 return 0;
1290}
1291
877211f5 1292static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1293{
1294 int err;
1295 err = substream->ops->prepare(substream);
1296 if (err < 0)
1297 return err;
1298 return snd_pcm_do_reset(substream, 0);
1299}
1300
877211f5 1301static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1302{
877211f5 1303 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1304 runtime->control->appl_ptr = runtime->status->hw_ptr;
1305 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1306}
1307
1308static struct action_ops snd_pcm_action_prepare = {
1309 .pre_action = snd_pcm_pre_prepare,
1310 .do_action = snd_pcm_do_prepare,
1311 .post_action = snd_pcm_post_prepare
1312};
1313
1314/**
1c85cc64 1315 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1316 * @substream: the PCM substream instance
0df63e44 1317 * @file: file to refer f_flags
1da177e4 1318 */
0df63e44
TI		 1319static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1320 struct file *file)
1da177e4
LT		 1321{
1322 int res;
877211f5 1323 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1324 int f_flags;
1325
1326 if (file)
1327 f_flags = file->f_flags;
1328 else
1329 f_flags = substream->f_flags;
1da177e4
LT		 1330
1331 snd_power_lock(card);
cbac4b0c 1332 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1333 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1334 substream, f_flags);
1da177e4
LT		 1335 snd_power_unlock(card);
1336 return res;
1337}
1338
1339/*
1340 * drain ioctl
1341 */
1342
877211f5 1343static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1344{
1da177e4
LT		 1345 substream->runtime->trigger_master = substream;
1346 return 0;
1347}
1348
877211f5 1349static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1350{
877211f5 1351 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1352 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1353 switch (runtime->status->state) {
1354 case SNDRV_PCM_STATE_PREPARED:
1355 /* start playback stream if possible */
1356 if (! snd_pcm_playback_empty(substream)) {
1357 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1358 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1359 }
1360 break;
1361 case SNDRV_PCM_STATE_RUNNING:
1362 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1363 break;
1364 default:
1365 break;
1366 }
1367 } else {
1368 /* stop running stream */
1369 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1370 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1371 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1372 snd_pcm_do_stop(substream, new_state);
1373 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1374 }
1375 }
1376 return 0;
1377}
1378
877211f5 1379static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1380{
1381}
1382
1383static struct action_ops snd_pcm_action_drain_init = {
1384 .pre_action = snd_pcm_pre_drain_init,
1385 .do_action = snd_pcm_do_drain_init,
1386 .post_action = snd_pcm_post_drain_init
1387};
1388
877211f5 1389static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1390
1391/*
1392 * Drain the stream(s).
1393 * When the substream is linked, sync until the draining of all playback streams
1394 * is finished.
1395 * After this call, all streams are supposed to be either SETUP or DRAINING
1396 * (capture only) state.
1397 */
4cdc115f
TI		 1398static int snd_pcm_drain(struct snd_pcm_substream *substream,
1399 struct file *file)
1da177e4 1400{
877211f5
TI		 1401 struct snd_card *card;
1402 struct snd_pcm_runtime *runtime;
ef991b95 1403 struct snd_pcm_substream *s;
d3a7dcfe 1404 wait_queue_t wait;
1da177e4 1405 int result = 0;
4cdc115f 1406 int nonblock = 0;
1da177e4 1407
1da177e4
LT		 1408 card = substream->pcm->card;
1409 runtime = substream->runtime;
1410
1411 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1412 return -EBADFD;
1413
1da177e4
LT		 1414 snd_power_lock(card);
1415 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1416 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1417 if (result < 0) {
1418 snd_power_unlock(card);
1419 return result;
1420 }
1da177e4
LT		 1421 }
1422
4cdc115f
TI		 1423 if (file) {
1424 if (file->f_flags & O_NONBLOCK)
1425 nonblock = 1;
1426 } else if (substream->f_flags & O_NONBLOCK)
1427 nonblock = 1;
1428
21cb2a2e 1429 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1430 snd_pcm_stream_lock_irq(substream);
1431 /* resume pause */
d3a7dcfe 1432 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1433 snd_pcm_pause(substream, 0);
1434
1435 /* pre-start/stop - all running streams are changed to DRAINING state */
1436 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1437 if (result < 0)
1438 goto unlock;
1439 /* in non-blocking, we don't wait in ioctl but let caller poll */
1440 if (nonblock) {
1441 result = -EAGAIN;
1442 goto unlock;
21cb2a2e 1443 }
1da177e4
LT		 1444
1445 for (;;) {
1446 long tout;
d3a7dcfe 1447 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1448 if (signal_pending(current)) {
1449 result = -ERESTARTSYS;
1450 break;
1451 }
d3a7dcfe
TI		 1452 /* find a substream to drain */
1453 to_check = NULL;
1454 snd_pcm_group_for_each_entry(s, substream) {
1455 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1456 continue;
1457 runtime = s->runtime;
1458 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1459 to_check = runtime;
21cb2a2e 1460 break;
d3a7dcfe 1461 }
21cb2a2e 1462 }
d3a7dcfe
TI		 1463 if (!to_check)
1464 break; /* all drained */
1465 init_waitqueue_entry(&wait, current);
1466 add_wait_queue(&to_check->sleep, &wait);
1da177e4
LT		 1467 set_current_state(TASK_INTERRUPTIBLE);
1468 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1469 up_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1470 snd_power_unlock(card);
1471 tout = schedule_timeout(10 * HZ);
1472 snd_power_lock(card);
d3a7dcfe 1473 down_read(&snd_pcm_link_rwsem);
1da177e4 1474 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1475 remove_wait_queue(&to_check->sleep, &wait);
1da177e4
LT		 1476 if (tout == 0) {
1477 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1478 result = -ESTRPIPE;
1479 else {
1480 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1481 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1482 result = -EIO;
1483 }
1484 break;
1485 }
1da177e4 1486 }
21cb2a2e 1487
4cdc115f 1488 unlock:
21cb2a2e 1489 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1490 up_read(&snd_pcm_link_rwsem);
1da177e4 1491 snd_power_unlock(card);
1da177e4
LT		 1492
1493 return result;
1494}
1495
1496/*
1497 * drop ioctl
1498 *
1499 * Immediately put all linked substreams into SETUP state.
1500 */
877211f5 1501static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1502{
877211f5
TI		 1503 struct snd_pcm_runtime *runtime;
1504 struct snd_card *card;
1da177e4
LT		 1505 int result = 0;
1506
7eaa943c
TI		 1507 if (PCM_RUNTIME_CHECK(substream))
1508 return -ENXIO;
1da177e4
LT		 1509 runtime = substream->runtime;
1510 card = substream->pcm->card;
1511
de1b8b93 1512 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1513 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1514 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1515 return -EBADFD;
1516
1da177e4
LT		 1517 snd_pcm_stream_lock_irq(substream);
1518 /* resume pause */
1519 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1520 snd_pcm_pause(substream, 0);
1521
1522 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1523 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1524 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1525
1da177e4
LT		 1526 return result;
1527}
1528
1529
1530/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1531static struct file *snd_pcm_file_fd(int fd)
1532{
1533 struct file *file;
1534 struct inode *inode;
f87135f5
CL		 1535 unsigned int minor;
1536
1da177e4
LT		 1537 file = fget(fd);
1538 if (!file)
1539 return NULL;
7bc56323 1540 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1541 if (!S_ISCHR(inode->i_mode) ||
1542 imajor(inode) != snd_major) {
1543 fput(file);
1544 return NULL;
1545 }
1546 minor = iminor(inode);
f87135f5
CL		 1547 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1548 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1549 fput(file);
1550 return NULL;
1551 }
1552 return file;
1553}
1554
1555/*
1556 * PCM link handling
1557 */
877211f5 1558static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1559{
1560 int res = 0;
1561 struct file *file;
877211f5
TI		 1562 struct snd_pcm_file *pcm_file;
1563 struct snd_pcm_substream *substream1;
1da177e4
LT		 1564
1565 file = snd_pcm_file_fd(fd);
1566 if (!file)
1567 return -EBADFD;
1568 pcm_file = file->private_data;
1569 substream1 = pcm_file->substream;
1570 down_write(&snd_pcm_link_rwsem);
1571 write_lock_irq(&snd_pcm_link_rwlock);
1572 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1573 substream->runtime->status->state != substream1->runtime->status->state) {
1574 res = -EBADFD;
1575 goto _end;
1576 }
1577 if (snd_pcm_stream_linked(substream1)) {
1578 res = -EALREADY;
1579 goto _end;
1580 }
1581 if (!snd_pcm_stream_linked(substream)) {
877211f5 1582 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1da177e4
LT		 1583 if (substream->group == NULL) {
1584 res = -ENOMEM;
1585 goto _end;
1586 }
1587 spin_lock_init(&substream->group->lock);
1588 INIT_LIST_HEAD(&substream->group->substreams);
1589 list_add_tail(&substream->link_list, &substream->group->substreams);
1590 substream->group->count = 1;
1591 }
1592 list_add_tail(&substream1->link_list, &substream->group->substreams);
1593 substream->group->count++;
1594 substream1->group = substream->group;
1595 _end:
1596 write_unlock_irq(&snd_pcm_link_rwlock);
1597 up_write(&snd_pcm_link_rwsem);
1598 fput(file);
1599 return res;
1600}
1601
877211f5 1602static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1603{
1604 substream->group = &substream->self_group;
1605 INIT_LIST_HEAD(&substream->self_group.substreams);
1606 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1607}
1608
877211f5 1609static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1610{
ef991b95 1611 struct snd_pcm_substream *s;
1da177e4
LT		 1612 int res = 0;
1613
1614 down_write(&snd_pcm_link_rwsem);
1615 write_lock_irq(&snd_pcm_link_rwlock);
1616 if (!snd_pcm_stream_linked(substream)) {
1617 res = -EALREADY;
1618 goto _end;
1619 }
1620 list_del(&substream->link_list);
1621 substream->group->count--;
1622 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1623 snd_pcm_group_for_each_entry(s, substream) {
1624 relink_to_local(s);
1da177e4
LT		 1625 break;
1626 }
1627 kfree(substream->group);
1628 }
1629 relink_to_local(substream);
1630 _end:
1631 write_unlock_irq(&snd_pcm_link_rwlock);
1632 up_write(&snd_pcm_link_rwsem);
1633 return res;
1634}
1635
1636/*
1637 * hw configurator
1638 */
877211f5
TI		 1639static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1640 struct snd_pcm_hw_rule *rule)
1da177e4 1641{
877211f5 1642 struct snd_interval t;
1da177e4
LT		 1643 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1644 hw_param_interval_c(params, rule->deps[1]), &t);
1645 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1646}
1647
877211f5
TI		 1648static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1649 struct snd_pcm_hw_rule *rule)
1da177e4 1650{
877211f5 1651 struct snd_interval t;
1da177e4
LT		 1652 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1653 hw_param_interval_c(params, rule->deps[1]), &t);
1654 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1655}
1656
877211f5
TI		 1657static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1658 struct snd_pcm_hw_rule *rule)
1da177e4 1659{
877211f5 1660 struct snd_interval t;
1da177e4
LT		 1661 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1662 hw_param_interval_c(params, rule->deps[1]),
1663 (unsigned long) rule->private, &t);
1664 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1665}
1666
877211f5
TI		 1667static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1668 struct snd_pcm_hw_rule *rule)
1da177e4 1669{
877211f5 1670 struct snd_interval t;
1da177e4
LT		 1671 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1672 (unsigned long) rule->private,
1673 hw_param_interval_c(params, rule->deps[1]), &t);
1674 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1675}
1676
877211f5
TI		 1677static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1678 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1679{
1680 unsigned int k;
877211f5
TI		 1681 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1682 struct snd_mask m;
1683 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1684 snd_mask_any(&m);
1685 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1686 int bits;
1687 if (! snd_mask_test(mask, k))
1688 continue;
1689 bits = snd_pcm_format_physical_width(k);
1690 if (bits <= 0)
1691 continue; /* ignore invalid formats */
1692 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1693 snd_mask_reset(&m, k);
1694 }
1695 return snd_mask_refine(mask, &m);
1696}
1697
877211f5
TI		 1698static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1da177e4 1700{
877211f5 1701 struct snd_interval t;
1da177e4
LT		 1702 unsigned int k;
1703 t.min = UINT_MAX;
1704 t.max = 0;
1705 t.openmin = 0;
1706 t.openmax = 0;
1707 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1708 int bits;
1709 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1710 continue;
1711 bits = snd_pcm_format_physical_width(k);
1712 if (bits <= 0)
1713 continue; /* ignore invalid formats */
1714 if (t.min > (unsigned)bits)
1715 t.min = bits;
1716 if (t.max < (unsigned)bits)
1717 t.max = bits;
1718 }
1719 t.integer = 1;
1720 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1721}
1722
1723#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1724#error "Change this table"
1725#endif
1726
1727static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1728 48000, 64000, 88200, 96000, 176400, 192000 };
1729
7653d557
CL		 1730const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1731 .count = ARRAY_SIZE(rates),
1732 .list = rates,
1733};
1734
877211f5
TI		 1735static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1736 struct snd_pcm_hw_rule *rule)
1da177e4 1737{
877211f5 1738 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1739 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1740 snd_pcm_known_rates.count,
1741 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1742}
1743
877211f5
TI		 1744static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1745 struct snd_pcm_hw_rule *rule)
1da177e4 1746{
877211f5
TI		 1747 struct snd_interval t;
1748 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1749 t.min = 0;
1750 t.max = substream->buffer_bytes_max;
1751 t.openmin = 0;
1752 t.openmax = 0;
1753 t.integer = 1;
1754 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1755}
1756
877211f5 1757int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1758{
877211f5
TI		 1759 struct snd_pcm_runtime *runtime = substream->runtime;
1760 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1761 int k, err;
1762
1763 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1764 snd_mask_any(constrs_mask(constrs, k));
1765 }
1766
1767 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1768 snd_interval_any(constrs_interval(constrs, k));
1769 }
1770
1771 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1772 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1773 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1774 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1775 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1776
1777 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1778 snd_pcm_hw_rule_format, NULL,
1779 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1780 if (err < 0)
1781 return err;
1782 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1783 snd_pcm_hw_rule_sample_bits, NULL,
1784 SNDRV_PCM_HW_PARAM_FORMAT,
1785 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1786 if (err < 0)
1787 return err;
1788 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1789 snd_pcm_hw_rule_div, NULL,
1790 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1791 if (err < 0)
1792 return err;
1793 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1794 snd_pcm_hw_rule_mul, NULL,
1795 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1796 if (err < 0)
1797 return err;
1798 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1799 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1800 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1801 if (err < 0)
1802 return err;
1803 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1804 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1805 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1806 if (err < 0)
1807 return err;
1808 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1809 snd_pcm_hw_rule_div, NULL,
1810 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1811 if (err < 0)
1812 return err;
1813 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1814 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1815 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1816 if (err < 0)
1817 return err;
1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1819 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1820 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1821 if (err < 0)
1822 return err;
1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1824 snd_pcm_hw_rule_div, NULL,
1825 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1826 if (err < 0)
1827 return err;
1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1829 snd_pcm_hw_rule_div, NULL,
1830 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1831 if (err < 0)
1832 return err;
1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1834 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1835 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1839 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1840 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1844 snd_pcm_hw_rule_mul, NULL,
1845 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1854 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1855 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1859 snd_pcm_hw_rule_muldivk, (void*) 8,
1860 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1864 snd_pcm_hw_rule_muldivk, (void*) 8,
1865 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1869 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1871 if (err < 0)
1872 return err;
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1874 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1876 if (err < 0)
1877 return err;
1878 return 0;
1879}
1880
877211f5 1881int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1882{
877211f5
TI		 1883 struct snd_pcm_runtime *runtime = substream->runtime;
1884 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1885 int err;
1886 unsigned int mask = 0;
1887
1888 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1889 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1890 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1891 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1892 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1893 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1894 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1895 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1896 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1897 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1898 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1899 }
1900 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 1901 if (err < 0)
1902 return err;
1da177e4
LT		 1903
1904 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 1905 if (err < 0)
1906 return err;
1da177e4
LT		 1907
1908 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 1909 if (err < 0)
1910 return err;
1da177e4
LT		 1911
1912 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1913 hw->channels_min, hw->channels_max);
7eaa943c
TI		 1914 if (err < 0)
1915 return err;
1da177e4
LT		 1916
1917 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1918 hw->rate_min, hw->rate_max);
7eaa943c
TI		 1919 if (err < 0)
1920 return err;
1da177e4
LT		 1921
1922 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1923 hw->period_bytes_min, hw->period_bytes_max);
7eaa943c
TI		 1924 if (err < 0)
1925 return err;
1da177e4
LT		 1926
1927 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1928 hw->periods_min, hw->periods_max);
7eaa943c
TI		 1929 if (err < 0)
1930 return err;
1da177e4
LT		 1931
1932 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1933 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 1934 if (err < 0)
1935 return err;
1da177e4
LT		 1936
1937 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1938 snd_pcm_hw_rule_buffer_bytes_max, substream,
1939 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1940 if (err < 0)
1941 return err;
1942
1943 /* FIXME: remove */
1944 if (runtime->dma_bytes) {
1945 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c
TI		 1946 if (err < 0)
1947 return -EINVAL;
1da177e4
LT		 1948 }
1949
1950 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1951 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1952 snd_pcm_hw_rule_rate, hw,
1953 SNDRV_PCM_HW_PARAM_RATE, -1);
1954 if (err < 0)
1955 return err;
1956 }
1957
1958 /* FIXME: this belong to lowlevel */
1da177e4
LT		 1959 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1960
1961 return 0;
1962}
1963
3bf75f9b 1964static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 1965{
1da177e4 1966 snd_pcm_unlink(substream);
3bf75f9b
TI		 1967}
1968
1969void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1970{
0df63e44
TI		 1971 substream->ref_count--;
1972 if (substream->ref_count > 0)
1973 return;
1974
3bf75f9b 1975 snd_pcm_drop(substream);
3bf75f9b 1976 if (substream->hw_opened) {
1da177e4
LT		 1977 if (substream->ops->hw_free != NULL)
1978 substream->ops->hw_free(substream);
1979 substream->ops->close(substream);
3bf75f9b 1980 substream->hw_opened = 0;
1da177e4 1981 }
1576274d
TI		 1982 if (substream->pcm_release) {
1983 substream->pcm_release(substream);
1984 substream->pcm_release = NULL;
1985 }
3bf75f9b
TI		 1986 snd_pcm_detach_substream(substream);
1987}
1988
e88e8ae6
TI		 1989EXPORT_SYMBOL(snd_pcm_release_substream);
1990
3bf75f9b
TI		 1991int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
1992 struct file *file,
1993 struct snd_pcm_substream **rsubstream)
1994{
1995 struct snd_pcm_substream *substream;
1996 int err;
1997
1998 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
1999 if (err < 0)
2000 return err;
0df63e44
TI		 2001 if (substream->ref_count > 1) {
2002 *rsubstream = substream;
2003 return 0;
2004 }
2005
3bf75f9b
TI		 2006 err = snd_pcm_hw_constraints_init(substream);
2007 if (err < 0) {
2008 snd_printd("snd_pcm_hw_constraints_init failed\n");
2009 goto error;
2010 }
2011
2012 if ((err = substream->ops->open(substream)) < 0)
2013 goto error;
2014
2015 substream->hw_opened = 1;
2016
2017 err = snd_pcm_hw_constraints_complete(substream);
2018 if (err < 0) {
2019 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2020 goto error;
2021 }
2022
2023 *rsubstream = substream;
1da177e4 2024 return 0;
3bf75f9b
TI		 2025
2026 error:
2027 snd_pcm_release_substream(substream);
2028 return err;
1da177e4
LT		 2029}
2030
e88e8ae6
TI		 2031EXPORT_SYMBOL(snd_pcm_open_substream);
2032
1da177e4 2033static int snd_pcm_open_file(struct file *file,
877211f5 2034 struct snd_pcm *pcm,
1da177e4 2035 int stream,
877211f5 2036 struct snd_pcm_file **rpcm_file)
1da177e4 2037{
877211f5
TI		 2038 struct snd_pcm_file *pcm_file;
2039 struct snd_pcm_substream *substream;
2040 struct snd_pcm_str *str;
3bf75f9b 2041 int err;
1da177e4 2042
7eaa943c
TI		 2043 if (rpcm_file)
2044 *rpcm_file = NULL;
1da177e4 2045
3bf75f9b
TI		 2046 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2047 if (err < 0)
2048 return err;
2049
548a648b
TI		 2050 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2051 if (pcm_file == NULL) {
2052 snd_pcm_release_substream(substream);
2053 return -ENOMEM;
2054 }
2055 pcm_file->substream = substream;
2056 if (substream->ref_count == 1) {
0df63e44
TI		 2057 str = substream->pstr;
2058 substream->file = pcm_file;
2059 substream->pcm_release = pcm_release_private;
1da177e4 2060 }
1da177e4 2061 file->private_data = pcm_file;
7eaa943c
TI		 2062 if (rpcm_file)
2063 *rpcm_file = pcm_file;
1da177e4
LT		 2064 return 0;
2065}
2066
f87135f5
CL		 2067static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2068{
2069 struct snd_pcm *pcm;
2070
2071 pcm = snd_lookup_minor_data(iminor(inode),
2072 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2073 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2074}
2075
2076static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2077{
877211f5 2078 struct snd_pcm *pcm;
f87135f5
CL		 2079
2080 pcm = snd_lookup_minor_data(iminor(inode),
2081 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2082 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2083}
2084
2085static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2086{
2087 int err;
877211f5 2088 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2089 wait_queue_t wait;
2090
1da177e4
LT		 2091 if (pcm == NULL) {
2092 err = -ENODEV;
2093 goto __error1;
2094 }
2095 err = snd_card_file_add(pcm->card, file);
2096 if (err < 0)
2097 goto __error1;
2098 if (!try_module_get(pcm->card->module)) {
2099 err = -EFAULT;
2100 goto __error2;
2101 }
2102 init_waitqueue_entry(&wait, current);
2103 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2104 mutex_lock(&pcm->open_mutex);
1da177e4 2105 while (1) {
f87135f5 2106 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
1da177e4
LT		 2107 if (err >= 0)
2108 break;
2109 if (err == -EAGAIN) {
2110 if (file->f_flags & O_NONBLOCK) {
2111 err = -EBUSY;
2112 break;
2113 }
2114 } else
2115 break;
2116 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2117 mutex_unlock(&pcm->open_mutex);
1da177e4 2118 schedule();
1a60d4c5 2119 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2120 if (signal_pending(current)) {
2121 err = -ERESTARTSYS;
2122 break;
2123 }
2124 }
2125 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2126 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2127 if (err < 0)
2128 goto __error;
2129 return err;
2130
2131 __error:
2132 module_put(pcm->card->module);
2133 __error2:
2134 snd_card_file_remove(pcm->card, file);
2135 __error1:
2136 return err;
2137}
2138
2139static int snd_pcm_release(struct inode *inode, struct file *file)
2140{
877211f5
TI		 2141 struct snd_pcm *pcm;
2142 struct snd_pcm_substream *substream;
2143 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2144
2145 pcm_file = file->private_data;
2146 substream = pcm_file->substream;
7eaa943c
TI		 2147 if (snd_BUG_ON(!substream))
2148 return -ENXIO;
1da177e4 2149 pcm = substream->pcm;
1a60d4c5 2150 mutex_lock(&pcm->open_mutex);
3bf75f9b 2151 snd_pcm_release_substream(substream);
548a648b 2152 kfree(pcm_file);
1a60d4c5 2153 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2154 wake_up(&pcm->open_wait);
2155 module_put(pcm->card->module);
2156 snd_card_file_remove(pcm->card, file);
2157 return 0;
2158}
2159
877211f5
TI		 2160static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2161 snd_pcm_uframes_t frames)
1da177e4 2162{
877211f5 2163 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2164 snd_pcm_sframes_t appl_ptr;
2165 snd_pcm_sframes_t ret;
2166 snd_pcm_sframes_t hw_avail;
2167
2168 if (frames == 0)
2169 return 0;
2170
2171 snd_pcm_stream_lock_irq(substream);
2172 switch (runtime->status->state) {
2173 case SNDRV_PCM_STATE_PREPARED:
2174 break;
2175 case SNDRV_PCM_STATE_DRAINING:
2176 case SNDRV_PCM_STATE_RUNNING:
2177 if (snd_pcm_update_hw_ptr(substream) >= 0)
2178 break;
2179 /* Fall through */
2180 case SNDRV_PCM_STATE_XRUN:
2181 ret = -EPIPE;
2182 goto __end;
51840409
LR		 2183 case SNDRV_PCM_STATE_SUSPENDED:
2184 ret = -ESTRPIPE;
2185 goto __end;
1da177e4
LT		 2186 default:
2187 ret = -EBADFD;
2188 goto __end;
2189 }
2190
2191 hw_avail = snd_pcm_playback_hw_avail(runtime);
2192 if (hw_avail <= 0) {
2193 ret = 0;
2194 goto __end;
2195 }
2196 if (frames > (snd_pcm_uframes_t)hw_avail)
2197 frames = hw_avail;
1da177e4
LT		 2198 appl_ptr = runtime->control->appl_ptr - frames;
2199 if (appl_ptr < 0)
2200 appl_ptr += runtime->boundary;
2201 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2202 ret = frames;
2203 __end:
2204 snd_pcm_stream_unlock_irq(substream);
2205 return ret;
2206}
2207
877211f5
TI		 2208static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2209 snd_pcm_uframes_t frames)
1da177e4 2210{
877211f5 2211 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2212 snd_pcm_sframes_t appl_ptr;
2213 snd_pcm_sframes_t ret;
2214 snd_pcm_sframes_t hw_avail;
2215
2216 if (frames == 0)
2217 return 0;
2218
2219 snd_pcm_stream_lock_irq(substream);
2220 switch (runtime->status->state) {
2221 case SNDRV_PCM_STATE_PREPARED:
2222 case SNDRV_PCM_STATE_DRAINING:
2223 break;
2224 case SNDRV_PCM_STATE_RUNNING:
2225 if (snd_pcm_update_hw_ptr(substream) >= 0)
2226 break;
2227 /* Fall through */
2228 case SNDRV_PCM_STATE_XRUN:
2229 ret = -EPIPE;
2230 goto __end;
51840409
LR		 2231 case SNDRV_PCM_STATE_SUSPENDED:
2232 ret = -ESTRPIPE;
2233 goto __end;
1da177e4
LT		 2234 default:
2235 ret = -EBADFD;
2236 goto __end;
2237 }
2238
2239 hw_avail = snd_pcm_capture_hw_avail(runtime);
2240 if (hw_avail <= 0) {
2241 ret = 0;
2242 goto __end;
2243 }
2244 if (frames > (snd_pcm_uframes_t)hw_avail)
2245 frames = hw_avail;
1da177e4
LT		 2246 appl_ptr = runtime->control->appl_ptr - frames;
2247 if (appl_ptr < 0)
2248 appl_ptr += runtime->boundary;
2249 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2250 ret = frames;
2251 __end:
2252 snd_pcm_stream_unlock_irq(substream);
2253 return ret;
2254}
2255
877211f5
TI		 2256static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2257 snd_pcm_uframes_t frames)
1da177e4 2258{
877211f5 2259 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2260 snd_pcm_sframes_t appl_ptr;
2261 snd_pcm_sframes_t ret;
2262 snd_pcm_sframes_t avail;
2263
2264 if (frames == 0)
2265 return 0;
2266
2267 snd_pcm_stream_lock_irq(substream);
2268 switch (runtime->status->state) {
2269 case SNDRV_PCM_STATE_PREPARED:
2270 case SNDRV_PCM_STATE_PAUSED:
2271 break;
2272 case SNDRV_PCM_STATE_DRAINING:
2273 case SNDRV_PCM_STATE_RUNNING:
2274 if (snd_pcm_update_hw_ptr(substream) >= 0)
2275 break;
2276 /* Fall through */
2277 case SNDRV_PCM_STATE_XRUN:
2278 ret = -EPIPE;
2279 goto __end;
51840409
LR		 2280 case SNDRV_PCM_STATE_SUSPENDED:
2281 ret = -ESTRPIPE;
2282 goto __end;
1da177e4
LT		 2283 default:
2284 ret = -EBADFD;
2285 goto __end;
2286 }
2287
2288 avail = snd_pcm_playback_avail(runtime);
2289 if (avail <= 0) {
2290 ret = 0;
2291 goto __end;
2292 }
2293 if (frames > (snd_pcm_uframes_t)avail)
2294 frames = avail;
1da177e4
LT		 2295 appl_ptr = runtime->control->appl_ptr + frames;
2296 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2297 appl_ptr -= runtime->boundary;
2298 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2299 ret = frames;
2300 __end:
2301 snd_pcm_stream_unlock_irq(substream);
2302 return ret;
2303}
2304
877211f5
TI		 2305static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2306 snd_pcm_uframes_t frames)
1da177e4 2307{
877211f5 2308 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2309 snd_pcm_sframes_t appl_ptr;
2310 snd_pcm_sframes_t ret;
2311 snd_pcm_sframes_t avail;
2312
2313 if (frames == 0)
2314 return 0;
2315
2316 snd_pcm_stream_lock_irq(substream);
2317 switch (runtime->status->state) {
2318 case SNDRV_PCM_STATE_PREPARED:
2319 case SNDRV_PCM_STATE_DRAINING:
2320 case SNDRV_PCM_STATE_PAUSED:
2321 break;
2322 case SNDRV_PCM_STATE_RUNNING:
2323 if (snd_pcm_update_hw_ptr(substream) >= 0)
2324 break;
2325 /* Fall through */
2326 case SNDRV_PCM_STATE_XRUN:
2327 ret = -EPIPE;
2328 goto __end;
51840409
LR		 2329 case SNDRV_PCM_STATE_SUSPENDED:
2330 ret = -ESTRPIPE;
2331 goto __end;
1da177e4
LT		 2332 default:
2333 ret = -EBADFD;
2334 goto __end;
2335 }
2336
2337 avail = snd_pcm_capture_avail(runtime);
2338 if (avail <= 0) {
2339 ret = 0;
2340 goto __end;
2341 }
2342 if (frames > (snd_pcm_uframes_t)avail)
2343 frames = avail;
1da177e4
LT		 2344 appl_ptr = runtime->control->appl_ptr + frames;
2345 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2346 appl_ptr -= runtime->boundary;
2347 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2348 ret = frames;
2349 __end:
2350 snd_pcm_stream_unlock_irq(substream);
2351 return ret;
2352}
2353
877211f5 2354static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2355{
877211f5 2356 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2357 int err;
2358
2359 snd_pcm_stream_lock_irq(substream);
2360 switch (runtime->status->state) {
2361 case SNDRV_PCM_STATE_DRAINING:
2362 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2363 goto __badfd;
2364 case SNDRV_PCM_STATE_RUNNING:
2365 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2366 break;
2367 /* Fall through */
2368 case SNDRV_PCM_STATE_PREPARED:
2369 case SNDRV_PCM_STATE_SUSPENDED:
2370 err = 0;
2371 break;
2372 case SNDRV_PCM_STATE_XRUN:
2373 err = -EPIPE;
2374 break;
2375 default:
2376 __badfd:
2377 err = -EBADFD;
2378 break;
2379 }
2380 snd_pcm_stream_unlock_irq(substream);
2381 return err;
2382}
2383
877211f5
TI		 2384static int snd_pcm_delay(struct snd_pcm_substream *substream,
2385 snd_pcm_sframes_t __user *res)
1da177e4 2386{
877211f5 2387 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2388 int err;
2389 snd_pcm_sframes_t n = 0;
2390
2391 snd_pcm_stream_lock_irq(substream);
2392 switch (runtime->status->state) {
2393 case SNDRV_PCM_STATE_DRAINING:
2394 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2395 goto __badfd;
2396 case SNDRV_PCM_STATE_RUNNING:
2397 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2398 break;
2399 /* Fall through */
2400 case SNDRV_PCM_STATE_PREPARED:
2401 case SNDRV_PCM_STATE_SUSPENDED:
2402 err = 0;
2403 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2404 n = snd_pcm_playback_hw_avail(runtime);
2405 else
2406 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2407 n += runtime->delay;
1da177e4
LT		 2408 break;
2409 case SNDRV_PCM_STATE_XRUN:
2410 err = -EPIPE;
2411 break;
2412 default:
2413 __badfd:
2414 err = -EBADFD;
2415 break;
2416 }
2417 snd_pcm_stream_unlock_irq(substream);
2418 if (!err)
2419 if (put_user(n, res))
2420 err = -EFAULT;
2421 return err;
2422}
2423
877211f5
TI		 2424static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2425 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2426{
877211f5
TI		 2427 struct snd_pcm_runtime *runtime = substream->runtime;
2428 struct snd_pcm_sync_ptr sync_ptr;
2429 volatile struct snd_pcm_mmap_status *status;
2430 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2431 int err;
2432
2433 memset(&sync_ptr, 0, sizeof(sync_ptr));
2434 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2435 return -EFAULT;
877211f5 2436 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2437 return -EFAULT;
2438 status = runtime->status;
2439 control = runtime->control;
2440 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2441 err = snd_pcm_hwsync(substream);
2442 if (err < 0)
2443 return err;
2444 }
2445 snd_pcm_stream_lock_irq(substream);
2446 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2447 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2448 else
2449 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2450 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2451 control->avail_min = sync_ptr.c.control.avail_min;
2452 else
2453 sync_ptr.c.control.avail_min = control->avail_min;
2454 sync_ptr.s.status.state = status->state;
2455 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2456 sync_ptr.s.status.tstamp = status->tstamp;
2457 sync_ptr.s.status.suspended_state = status->suspended_state;
2458 snd_pcm_stream_unlock_irq(substream);
2459 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2460 return -EFAULT;
2461 return 0;
2462}
b751eef1
JK		 2463
2464static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2465{
2466 struct snd_pcm_runtime *runtime = substream->runtime;
2467 int arg;
2468
2469 if (get_user(arg, _arg))
2470 return -EFAULT;
2471 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2472 return -EINVAL;
2473 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2474 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2475 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2476 return 0;
2477}
1da177e4 2478
0df63e44
TI		 2479static int snd_pcm_common_ioctl1(struct file *file,
2480 struct snd_pcm_substream *substream,
1da177e4
LT		 2481 unsigned int cmd, void __user *arg)
2482{
1da177e4
LT		 2483 switch (cmd) {
2484 case SNDRV_PCM_IOCTL_PVERSION:
2485 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2486 case SNDRV_PCM_IOCTL_INFO:
2487 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2488 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2489 return 0;
b751eef1
JK		 2490 case SNDRV_PCM_IOCTL_TTSTAMP:
2491 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2492 case SNDRV_PCM_IOCTL_HW_REFINE:
2493 return snd_pcm_hw_refine_user(substream, arg);
2494 case SNDRV_PCM_IOCTL_HW_PARAMS:
2495 return snd_pcm_hw_params_user(substream, arg);
2496 case SNDRV_PCM_IOCTL_HW_FREE:
2497 return snd_pcm_hw_free(substream);
2498 case SNDRV_PCM_IOCTL_SW_PARAMS:
2499 return snd_pcm_sw_params_user(substream, arg);
2500 case SNDRV_PCM_IOCTL_STATUS:
2501 return snd_pcm_status_user(substream, arg);
2502 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2503 return snd_pcm_channel_info_user(substream, arg);
2504 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2505 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2506 case SNDRV_PCM_IOCTL_RESET:
2507 return snd_pcm_reset(substream);
2508 case SNDRV_PCM_IOCTL_START:
2509 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2510 case SNDRV_PCM_IOCTL_LINK:
2511 return snd_pcm_link(substream, (int)(unsigned long) arg);
2512 case SNDRV_PCM_IOCTL_UNLINK:
2513 return snd_pcm_unlink(substream);
2514 case SNDRV_PCM_IOCTL_RESUME:
2515 return snd_pcm_resume(substream);
2516 case SNDRV_PCM_IOCTL_XRUN:
2517 return snd_pcm_xrun(substream);
2518 case SNDRV_PCM_IOCTL_HWSYNC:
2519 return snd_pcm_hwsync(substream);
2520 case SNDRV_PCM_IOCTL_DELAY:
2521 return snd_pcm_delay(substream, arg);
2522 case SNDRV_PCM_IOCTL_SYNC_PTR:
2523 return snd_pcm_sync_ptr(substream, arg);
59d48582 2524#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2525 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2526 return snd_pcm_hw_refine_old_user(substream, arg);
2527 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2528 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2529#endif
1da177e4 2530 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2531 return snd_pcm_drain(substream, file);
1da177e4
LT		 2532 case SNDRV_PCM_IOCTL_DROP:
2533 return snd_pcm_drop(substream);
e661d0dd
TI		 2534 case SNDRV_PCM_IOCTL_PAUSE:
2535 {
2536 int res;
2537 snd_pcm_stream_lock_irq(substream);
2538 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2539 snd_pcm_stream_unlock_irq(substream);
2540 return res;
2541 }
1da177e4
LT		 2542 }
2543 snd_printd("unknown ioctl = 0x%x\n", cmd);
2544 return -ENOTTY;
2545}
2546
0df63e44
TI		 2547static int snd_pcm_playback_ioctl1(struct file *file,
2548 struct snd_pcm_substream *substream,
1da177e4
LT		 2549 unsigned int cmd, void __user *arg)
2550{
7eaa943c
TI		 2551 if (snd_BUG_ON(!substream))
2552 return -ENXIO;
2553 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2554 return -EINVAL;
1da177e4
LT		 2555 switch (cmd) {
2556 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2557 {
877211f5
TI		 2558 struct snd_xferi xferi;
2559 struct snd_xferi __user *_xferi = arg;
2560 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2561 snd_pcm_sframes_t result;
2562 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2563 return -EBADFD;
2564 if (put_user(0, &_xferi->result))
2565 return -EFAULT;
2566 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2567 return -EFAULT;
2568 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2569 __put_user(result, &_xferi->result);
2570 return result < 0 ? result : 0;
2571 }
2572 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2573 {
877211f5
TI		 2574 struct snd_xfern xfern;
2575 struct snd_xfern __user *_xfern = arg;
2576 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2577 void __user **bufs;
2578 snd_pcm_sframes_t result;
2579 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2580 return -EBADFD;
2581 if (runtime->channels > 128)
2582 return -EINVAL;
2583 if (put_user(0, &_xfern->result))
2584 return -EFAULT;
2585 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2586 return -EFAULT;
ef44a1ec
LZ		 2587
2588 bufs = memdup_user(xfern.bufs,
2589 sizeof(void *) * runtime->channels);
2590 if (IS_ERR(bufs))
2591 return PTR_ERR(bufs);
1da177e4
LT		 2592 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2593 kfree(bufs);
2594 __put_user(result, &_xfern->result);
2595 return result < 0 ? result : 0;
2596 }
2597 case SNDRV_PCM_IOCTL_REWIND:
2598 {
2599 snd_pcm_uframes_t frames;
2600 snd_pcm_uframes_t __user *_frames = arg;
2601 snd_pcm_sframes_t result;
2602 if (get_user(frames, _frames))
2603 return -EFAULT;
2604 if (put_user(0, _frames))
2605 return -EFAULT;
2606 result = snd_pcm_playback_rewind(substream, frames);
2607 __put_user(result, _frames);
2608 return result < 0 ? result : 0;
2609 }
2610 case SNDRV_PCM_IOCTL_FORWARD:
2611 {
2612 snd_pcm_uframes_t frames;
2613 snd_pcm_uframes_t __user *_frames = arg;
2614 snd_pcm_sframes_t result;
2615 if (get_user(frames, _frames))
2616 return -EFAULT;
2617 if (put_user(0, _frames))
2618 return -EFAULT;
2619 result = snd_pcm_playback_forward(substream, frames);
2620 __put_user(result, _frames);
2621 return result < 0 ? result : 0;
2622 }
1da177e4 2623 }
0df63e44 2624 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2625}
2626
0df63e44
TI		 2627static int snd_pcm_capture_ioctl1(struct file *file,
2628 struct snd_pcm_substream *substream,
1da177e4
LT		 2629 unsigned int cmd, void __user *arg)
2630{
7eaa943c
TI		 2631 if (snd_BUG_ON(!substream))
2632 return -ENXIO;
2633 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2634 return -EINVAL;
1da177e4
LT		 2635 switch (cmd) {
2636 case SNDRV_PCM_IOCTL_READI_FRAMES:
2637 {
877211f5
TI		 2638 struct snd_xferi xferi;
2639 struct snd_xferi __user *_xferi = arg;
2640 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2641 snd_pcm_sframes_t result;
2642 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2643 return -EBADFD;
2644 if (put_user(0, &_xferi->result))
2645 return -EFAULT;
2646 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2647 return -EFAULT;
2648 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2649 __put_user(result, &_xferi->result);
2650 return result < 0 ? result : 0;
2651 }
2652 case SNDRV_PCM_IOCTL_READN_FRAMES:
2653 {
877211f5
TI		 2654 struct snd_xfern xfern;
2655 struct snd_xfern __user *_xfern = arg;
2656 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2657 void *bufs;
2658 snd_pcm_sframes_t result;
2659 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2660 return -EBADFD;
2661 if (runtime->channels > 128)
2662 return -EINVAL;
2663 if (put_user(0, &_xfern->result))
2664 return -EFAULT;
2665 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2666 return -EFAULT;
ef44a1ec
LZ		 2667
2668 bufs = memdup_user(xfern.bufs,
2669 sizeof(void *) * runtime->channels);
2670 if (IS_ERR(bufs))
2671 return PTR_ERR(bufs);
1da177e4
LT		 2672 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2673 kfree(bufs);
2674 __put_user(result, &_xfern->result);
2675 return result < 0 ? result : 0;
2676 }
2677 case SNDRV_PCM_IOCTL_REWIND:
2678 {
2679 snd_pcm_uframes_t frames;
2680 snd_pcm_uframes_t __user *_frames = arg;
2681 snd_pcm_sframes_t result;
2682 if (get_user(frames, _frames))
2683 return -EFAULT;
2684 if (put_user(0, _frames))
2685 return -EFAULT;
2686 result = snd_pcm_capture_rewind(substream, frames);
2687 __put_user(result, _frames);
2688 return result < 0 ? result : 0;
2689 }
2690 case SNDRV_PCM_IOCTL_FORWARD:
2691 {
2692 snd_pcm_uframes_t frames;
2693 snd_pcm_uframes_t __user *_frames = arg;
2694 snd_pcm_sframes_t result;
2695 if (get_user(frames, _frames))
2696 return -EFAULT;
2697 if (put_user(0, _frames))
2698 return -EFAULT;
2699 result = snd_pcm_capture_forward(substream, frames);
2700 __put_user(result, _frames);
2701 return result < 0 ? result : 0;
2702 }
2703 }
0df63e44 2704 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2705}
2706
877211f5
TI		 2707static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2708 unsigned long arg)
1da177e4 2709{
877211f5 2710 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2711
2712 pcm_file = file->private_data;
2713
2714 if (((cmd >> 8) & 0xff) != 'A')
2715 return -ENOTTY;
2716
0df63e44
TI		 2717 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2718 (void __user *)arg);
1da177e4
LT		 2719}
2720
877211f5
TI		 2721static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2722 unsigned long arg)
1da177e4 2723{
877211f5 2724 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2725
2726 pcm_file = file->private_data;
2727
2728 if (((cmd >> 8) & 0xff) != 'A')
2729 return -ENOTTY;
2730
0df63e44
TI		 2731 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2732 (void __user *)arg);
1da177e4
LT		 2733}
2734
bf1bbb5a
TI		 2735int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2736 unsigned int cmd, void *arg)
1da177e4
LT		 2737{
2738 mm_segment_t fs;
2739 int result;
2740
2741 fs = snd_enter_user();
1da177e4
LT		 2742 switch (substream->stream) {
2743 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2744 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2745 (void __user *)arg);
bf1bbb5a 2746 break;
1da177e4 2747 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2748 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2749 (void __user *)arg);
bf1bbb5a 2750 break;
1da177e4 2751 default:
bf1bbb5a
TI		 2752 result = -EINVAL;
2753 break;
1da177e4 2754 }
bf1bbb5a
TI		 2755 snd_leave_user(fs);
2756 return result;
1da177e4
LT		 2757}
2758
e88e8ae6
TI		 2759EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2760
877211f5
TI		 2761static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2762 loff_t * offset)
1da177e4 2763{
877211f5
TI		 2764 struct snd_pcm_file *pcm_file;
2765 struct snd_pcm_substream *substream;
2766 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2767 snd_pcm_sframes_t result;
2768
2769 pcm_file = file->private_data;
2770 substream = pcm_file->substream;
7eaa943c
TI		 2771 if (PCM_RUNTIME_CHECK(substream))
2772 return -ENXIO;
1da177e4
LT		 2773 runtime = substream->runtime;
2774 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2775 return -EBADFD;
2776 if (!frame_aligned(runtime, count))
2777 return -EINVAL;
2778 count = bytes_to_frames(runtime, count);
2779 result = snd_pcm_lib_read(substream, buf, count);
2780 if (result > 0)
2781 result = frames_to_bytes(runtime, result);
2782 return result;
2783}
2784
877211f5
TI		 2785static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2786 size_t count, loff_t * offset)
1da177e4 2787{
877211f5
TI		 2788 struct snd_pcm_file *pcm_file;
2789 struct snd_pcm_substream *substream;
2790 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2791 snd_pcm_sframes_t result;
2792
2793 pcm_file = file->private_data;
2794 substream = pcm_file->substream;
7eaa943c
TI		 2795 if (PCM_RUNTIME_CHECK(substream))
2796 return -ENXIO;
1da177e4 2797 runtime = substream->runtime;
7eaa943c
TI		 2798 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2799 return -EBADFD;
2800 if (!frame_aligned(runtime, count))
2801 return -EINVAL;
1da177e4
LT		 2802 count = bytes_to_frames(runtime, count);
2803 result = snd_pcm_lib_write(substream, buf, count);
2804 if (result > 0)
2805 result = frames_to_bytes(runtime, result);
1da177e4
LT		 2806 return result;
2807}
2808
ee0b3e67
BP		 2809static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2810 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2811
2812{
877211f5
TI		 2813 struct snd_pcm_file *pcm_file;
2814 struct snd_pcm_substream *substream;
2815 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2816 snd_pcm_sframes_t result;
2817 unsigned long i;
2818 void __user **bufs;
2819 snd_pcm_uframes_t frames;
2820
ee0b3e67 2821 pcm_file = iocb->ki_filp->private_data;
1da177e4 2822 substream = pcm_file->substream;
7eaa943c
TI		 2823 if (PCM_RUNTIME_CHECK(substream))
2824 return -ENXIO;
1da177e4
LT		 2825 runtime = substream->runtime;
2826 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2827 return -EBADFD;
ee0b3e67 2828 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2829 return -EINVAL;
ee0b3e67 2830 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2831 return -EINVAL;
ee0b3e67
BP		 2832 frames = bytes_to_samples(runtime, iov->iov_len);
2833 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2834 if (bufs == NULL)
2835 return -ENOMEM;
ee0b3e67
BP		 2836 for (i = 0; i < nr_segs; ++i)
2837 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2838 result = snd_pcm_lib_readv(substream, bufs, frames);
2839 if (result > 0)
2840 result = frames_to_bytes(runtime, result);
2841 kfree(bufs);
2842 return result;
2843}
2844
ee0b3e67
BP		 2845static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2846 unsigned long nr_segs, loff_t pos)
1da177e4 2847{
877211f5
TI		 2848 struct snd_pcm_file *pcm_file;
2849 struct snd_pcm_substream *substream;
2850 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2851 snd_pcm_sframes_t result;
2852 unsigned long i;
2853 void __user **bufs;
2854 snd_pcm_uframes_t frames;
2855
ee0b3e67 2856 pcm_file = iocb->ki_filp->private_data;
1da177e4 2857 substream = pcm_file->substream;
7eaa943c
TI		 2858 if (PCM_RUNTIME_CHECK(substream))
2859 return -ENXIO;
1da177e4 2860 runtime = substream->runtime;
7eaa943c
TI		 2861 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2862 return -EBADFD;
ee0b3e67 2863 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 2864 !frame_aligned(runtime, iov->iov_len))
2865 return -EINVAL;
ee0b3e67
BP		 2866 frames = bytes_to_samples(runtime, iov->iov_len);
2867 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2868 if (bufs == NULL)
2869 return -ENOMEM;
ee0b3e67
BP		 2870 for (i = 0; i < nr_segs; ++i)
2871 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2872 result = snd_pcm_lib_writev(substream, bufs, frames);
2873 if (result > 0)
2874 result = frames_to_bytes(runtime, result);
2875 kfree(bufs);
1da177e4
LT		 2876 return result;
2877}
2878
2879static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2880{
877211f5
TI		 2881 struct snd_pcm_file *pcm_file;
2882 struct snd_pcm_substream *substream;
2883 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2884 unsigned int mask;
2885 snd_pcm_uframes_t avail;
2886
2887 pcm_file = file->private_data;
2888
2889 substream = pcm_file->substream;
7eaa943c
TI		 2890 if (PCM_RUNTIME_CHECK(substream))
2891 return -ENXIO;
1da177e4
LT		 2892 runtime = substream->runtime;
2893
2894 poll_wait(file, &runtime->sleep, wait);
2895
2896 snd_pcm_stream_lock_irq(substream);
2897 avail = snd_pcm_playback_avail(runtime);
2898 switch (runtime->status->state) {
2899 case SNDRV_PCM_STATE_RUNNING:
2900 case SNDRV_PCM_STATE_PREPARED:
2901 case SNDRV_PCM_STATE_PAUSED:
2902 if (avail >= runtime->control->avail_min) {
2903 mask = POLLOUT | POLLWRNORM;
2904 break;
2905 }
2906 /* Fall through */
2907 case SNDRV_PCM_STATE_DRAINING:
2908 mask = 0;
2909 break;
2910 default:
2911 mask = POLLOUT | POLLWRNORM | POLLERR;
2912 break;
2913 }
2914 snd_pcm_stream_unlock_irq(substream);
2915 return mask;
2916}
2917
2918static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2919{
877211f5
TI		 2920 struct snd_pcm_file *pcm_file;
2921 struct snd_pcm_substream *substream;
2922 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2923 unsigned int mask;
2924 snd_pcm_uframes_t avail;
2925
2926 pcm_file = file->private_data;
2927
2928 substream = pcm_file->substream;
7eaa943c
TI		 2929 if (PCM_RUNTIME_CHECK(substream))
2930 return -ENXIO;
1da177e4
LT		 2931 runtime = substream->runtime;
2932
2933 poll_wait(file, &runtime->sleep, wait);
2934
2935 snd_pcm_stream_lock_irq(substream);
2936 avail = snd_pcm_capture_avail(runtime);
2937 switch (runtime->status->state) {
2938 case SNDRV_PCM_STATE_RUNNING:
2939 case SNDRV_PCM_STATE_PREPARED:
2940 case SNDRV_PCM_STATE_PAUSED:
2941 if (avail >= runtime->control->avail_min) {
2942 mask = POLLIN | POLLRDNORM;
2943 break;
2944 }
2945 mask = 0;
2946 break;
2947 case SNDRV_PCM_STATE_DRAINING:
2948 if (avail > 0) {
2949 mask = POLLIN | POLLRDNORM;
2950 break;
2951 }
2952 /* Fall through */
2953 default:
2954 mask = POLLIN | POLLRDNORM | POLLERR;
2955 break;
2956 }
2957 snd_pcm_stream_unlock_irq(substream);
2958 return mask;
2959}
2960
2961/*
2962 * mmap support
2963 */
2964
2965/*
2966 * Only on coherent architectures, we can mmap the status and the control records
2967 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2968 */
2969#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2970/*
2971 * mmap status record
2972 */
3ad5afcd
NP		 2973static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2974 struct vm_fault *vmf)
1da177e4 2975{
877211f5
TI		 2976 struct snd_pcm_substream *substream = area->vm_private_data;
2977 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2978
2979 if (substream == NULL)
3ad5afcd 2980 return VM_FAULT_SIGBUS;
1da177e4 2981 runtime = substream->runtime;
3ad5afcd
NP		 2982 vmf->page = virt_to_page(runtime->status);
2983 get_page(vmf->page);
2984 return 0;
1da177e4
LT		 2985}
2986
f0f37e2f 2987static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 2988{
3ad5afcd 2989 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 2990};
2991
877211f5 2992static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 2993 struct vm_area_struct *area)
2994{
877211f5 2995 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2996 long size;
2997 if (!(area->vm_flags & VM_READ))
2998 return -EINVAL;
2999 runtime = substream->runtime;
1da177e4 3000 size = area->vm_end - area->vm_start;
877211f5 3001 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3002 return -EINVAL;
3003 area->vm_ops = &snd_pcm_vm_ops_status;
3004 area->vm_private_data = substream;
3005 area->vm_flags |= VM_RESERVED;
3006 return 0;
3007}
3008
3009/*
3010 * mmap control record
3011 */
3ad5afcd
NP		 3012static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3013 struct vm_fault *vmf)
1da177e4 3014{
877211f5
TI		 3015 struct snd_pcm_substream *substream = area->vm_private_data;
3016 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3017
3018 if (substream == NULL)
3ad5afcd 3019 return VM_FAULT_SIGBUS;
1da177e4 3020 runtime = substream->runtime;
3ad5afcd
NP		 3021 vmf->page = virt_to_page(runtime->control);
3022 get_page(vmf->page);
3023 return 0;
1da177e4
LT		 3024}
3025
f0f37e2f 3026static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3027{
3ad5afcd 3028 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3029};
3030
877211f5 3031static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3032 struct vm_area_struct *area)
3033{
877211f5 3034 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3035 long size;
3036 if (!(area->vm_flags & VM_READ))
3037 return -EINVAL;
3038 runtime = substream->runtime;
1da177e4 3039 size = area->vm_end - area->vm_start;
877211f5 3040 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3041 return -EINVAL;
3042 area->vm_ops = &snd_pcm_vm_ops_control;
3043 area->vm_private_data = substream;
3044 area->vm_flags |= VM_RESERVED;
3045 return 0;
3046}
3047#else /* ! coherent mmap */
3048/*
3049 * don't support mmap for status and control records.
3050 */
877211f5 3051static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3052 struct vm_area_struct *area)
3053{
3054 return -ENXIO;
3055}
877211f5 3056static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3057 struct vm_area_struct *area)
3058{
3059 return -ENXIO;
3060}
3061#endif /* coherent mmap */
3062
9eb4a067
TI		 3063static inline struct page *
3064snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3065{
3066 void *vaddr = substream->runtime->dma_area + ofs;
66b6cfac
TI		 3067#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3068 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3069 return virt_to_page(CAC_ADDR(vaddr));
6985c887
TI		 3070#endif
3071#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3072 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3073 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3074 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3075 /* assume dma_handle set via pfn_to_phys() in
3076 * mm/dma-noncoherent.c
3077 */
3078 return pfn_to_page(addr >> PAGE_SHIFT);
3079 }
66b6cfac 3080#endif
9eb4a067
TI		 3081 return virt_to_page(vaddr);
3082}
3083
1da177e4 3084/*
3ad5afcd 3085 * fault callback for mmapping a RAM page
1da177e4 3086 */
3ad5afcd
NP		 3087static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3088 struct vm_fault *vmf)
1da177e4 3089{
877211f5
TI		 3090 struct snd_pcm_substream *substream = area->vm_private_data;
3091 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3092 unsigned long offset;
3093 struct page * page;
1da177e4
LT		 3094 size_t dma_bytes;
3095
3096 if (substream == NULL)
3ad5afcd 3097 return VM_FAULT_SIGBUS;
1da177e4 3098 runtime = substream->runtime;
3ad5afcd 3099 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3100 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3101 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3102 return VM_FAULT_SIGBUS;
9eb4a067 3103 if (substream->ops->page)
1da177e4 3104 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3105 else
3106 page = snd_pcm_default_page_ops(substream, offset);
3107 if (!page)
3108 return VM_FAULT_SIGBUS;
b5810039 3109 get_page(page);
3ad5afcd
NP		 3110 vmf->page = page;
3111 return 0;
1da177e4
LT		 3112}
3113
657b1989
TI		 3114static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3115 .open = snd_pcm_mmap_data_open,
3116 .close = snd_pcm_mmap_data_close,
3117};
3118
3119static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3120 .open = snd_pcm_mmap_data_open,
3121 .close = snd_pcm_mmap_data_close,
3ad5afcd 3122 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3123};
3124
657b1989
TI		 3125#ifndef ARCH_HAS_DMA_MMAP_COHERENT
3126/* This should be defined / handled globally! */
3127#ifdef CONFIG_ARM
3128#define ARCH_HAS_DMA_MMAP_COHERENT
3129#endif
3130#endif
3131
1da177e4
LT		 3132/*
3133 * mmap the DMA buffer on RAM
3134 */
877211f5
TI		 3135static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3136 struct vm_area_struct *area)
1da177e4 3137{
1da177e4 3138 area->vm_flags |= VM_RESERVED;
657b1989
TI		 3139#ifdef ARCH_HAS_DMA_MMAP_COHERENT
3140 if (!substream->ops->page &&
3141 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3142 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3143 area,
3144 substream->runtime->dma_area,
3145 substream->runtime->dma_addr,
3146 area->vm_end - area->vm_start);
3147#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3148 /* mmap with fault handler */
3149 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3150 return 0;
3151}
3152
3153/*
3154 * mmap the DMA buffer on I/O memory area
3155 */
3156#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3157int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3158 struct vm_area_struct *area)
1da177e4
LT		 3159{
3160 long size;
3161 unsigned long offset;
3162
3163#ifdef pgprot_noncached
3164 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3165#endif
1da177e4
LT		 3166 area->vm_flags |= VM_IO;
3167 size = area->vm_end - area->vm_start;
3168 offset = area->vm_pgoff << PAGE_SHIFT;
3169 if (io_remap_pfn_range(area, area->vm_start,
3170 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3171 size, area->vm_page_prot))
3172 return -EAGAIN;
1da177e4
LT		 3173 return 0;
3174}
e88e8ae6
TI		 3175
3176EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3177#endif /* SNDRV_PCM_INFO_MMAP */
3178
3179/*
3180 * mmap DMA buffer
3181 */
877211f5 3182int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3183 struct vm_area_struct *area)
3184{
877211f5 3185 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3186 long size;
3187 unsigned long offset;
3188 size_t dma_bytes;
657b1989 3189 int err;
1da177e4
LT		 3190
3191 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3192 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3193 return -EINVAL;
3194 } else {
3195 if (!(area->vm_flags & VM_READ))
3196 return -EINVAL;
3197 }
3198 runtime = substream->runtime;
1da177e4
LT		 3199 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3200 return -EBADFD;
3201 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3202 return -ENXIO;
3203 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3204 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3205 return -EINVAL;
3206 size = area->vm_end - area->vm_start;
3207 offset = area->vm_pgoff << PAGE_SHIFT;
3208 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3209 if ((size_t)size > dma_bytes)
3210 return -EINVAL;
3211 if (offset > dma_bytes - size)
3212 return -EINVAL;
3213
657b1989
TI		 3214 area->vm_ops = &snd_pcm_vm_ops_data;
3215 area->vm_private_data = substream;
1da177e4 3216 if (substream->ops->mmap)
657b1989 3217 err = substream->ops->mmap(substream, area);
1da177e4 3218 else
657b1989
TI		 3219 err = snd_pcm_default_mmap(substream, area);
3220 if (!err)
3221 atomic_inc(&substream->mmap_count);
3222 return err;
1da177e4
LT		 3223}
3224
e88e8ae6
TI		 3225EXPORT_SYMBOL(snd_pcm_mmap_data);
3226
1da177e4
LT		 3227static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3228{
877211f5
TI		 3229 struct snd_pcm_file * pcm_file;
3230 struct snd_pcm_substream *substream;
1da177e4
LT		 3231 unsigned long offset;
3232
3233 pcm_file = file->private_data;
3234 substream = pcm_file->substream;
7eaa943c
TI		 3235 if (PCM_RUNTIME_CHECK(substream))
3236 return -ENXIO;
1da177e4
LT		 3237
3238 offset = area->vm_pgoff << PAGE_SHIFT;
3239 switch (offset) {
3240 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3241 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3242 return -ENXIO;
3243 return snd_pcm_mmap_status(substream, file, area);
3244 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3245 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3246 return -ENXIO;
3247 return snd_pcm_mmap_control(substream, file, area);
3248 default:
3249 return snd_pcm_mmap_data(substream, file, area);
3250 }
3251 return 0;
3252}
3253
3254static int snd_pcm_fasync(int fd, struct file * file, int on)
3255{
877211f5
TI		 3256 struct snd_pcm_file * pcm_file;
3257 struct snd_pcm_substream *substream;
3258 struct snd_pcm_runtime *runtime;
2db9f0a3 3259 int err = -ENXIO;
1da177e4 3260
2db9f0a3 3261 lock_kernel();
1da177e4
LT		 3262 pcm_file = file->private_data;
3263 substream = pcm_file->substream;
7eaa943c
TI		 3264 if (PCM_RUNTIME_CHECK(substream))
3265 goto out;
1da177e4 3266 runtime = substream->runtime;
1da177e4 3267 err = fasync_helper(fd, file, on, &runtime->fasync);
685d87f7 3268out:
2db9f0a3 3269 unlock_kernel();
60aa4924 3270 return err;
1da177e4
LT		 3271}
3272
3273/*
3274 * ioctl32 compat
3275 */
3276#ifdef CONFIG_COMPAT
3277#include "pcm_compat.c"
3278#else
3279#define snd_pcm_ioctl_compat NULL
3280#endif
3281
3282/*
3283 * To be removed helpers to keep binary compatibility
3284 */
3285
59d48582 3286#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3287#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3288#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3289
877211f5
TI		 3290static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3291 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3292{
3293 unsigned int i;
3294
3295 memset(params, 0, sizeof(*params));
3296 params->flags = oparams->flags;
3297 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3298 params->masks[i].bits[0] = oparams->masks[i];
3299 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3300 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3301 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3302 params->info = oparams->info;
3303 params->msbits = oparams->msbits;
3304 params->rate_num = oparams->rate_num;
3305 params->rate_den = oparams->rate_den;
3306 params->fifo_size = oparams->fifo_size;
3307}
3308
877211f5
TI		 3309static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3310 struct snd_pcm_hw_params *params)
1da177e4
LT		 3311{
3312 unsigned int i;
3313
3314 memset(oparams, 0, sizeof(*oparams));
3315 oparams->flags = params->flags;
3316 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3317 oparams->masks[i] = params->masks[i].bits[0];
3318 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3319 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3320 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3321 oparams->info = params->info;
3322 oparams->msbits = params->msbits;
3323 oparams->rate_num = params->rate_num;
3324 oparams->rate_den = params->rate_den;
3325 oparams->fifo_size = params->fifo_size;
3326}
3327
877211f5
TI		 3328static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3329 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3330{
877211f5
TI		 3331 struct snd_pcm_hw_params *params;
3332 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3333 int err;
3334
3335 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3336 if (!params)
3337 return -ENOMEM;
1da177e4 3338
ef44a1ec
LZ		 3339 oparams = memdup_user(_oparams, sizeof(*oparams));
3340 if (IS_ERR(oparams)) {
3341 err = PTR_ERR(oparams);
1da177e4
LT		 3342 goto out;
3343 }
3344 snd_pcm_hw_convert_from_old_params(params, oparams);
3345 err = snd_pcm_hw_refine(substream, params);
3346 snd_pcm_hw_convert_to_old_params(oparams, params);
3347 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3348 if (!err)
3349 err = -EFAULT;
3350 }
ef44a1ec
LZ		 3351
3352 kfree(oparams);
1da177e4
LT		 3353out:
3354 kfree(params);
1da177e4
LT		 3355 return err;
3356}
3357
877211f5
TI		 3358static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3359 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3360{
877211f5
TI		 3361 struct snd_pcm_hw_params *params;
3362 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3363 int err;
3364
3365 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3366 if (!params)
3367 return -ENOMEM;
3368
3369 oparams = memdup_user(_oparams, sizeof(*oparams));
3370 if (IS_ERR(oparams)) {
3371 err = PTR_ERR(oparams);
1da177e4
LT		 3372 goto out;
3373 }
3374 snd_pcm_hw_convert_from_old_params(params, oparams);
3375 err = snd_pcm_hw_params(substream, params);
3376 snd_pcm_hw_convert_to_old_params(oparams, params);
3377 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3378 if (!err)
3379 err = -EFAULT;
3380 }
ef44a1ec
LZ		 3381
3382 kfree(oparams);
1da177e4
LT		 3383out:
3384 kfree(params);
1da177e4
LT		 3385 return err;
3386}
59d48582 3387#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3388
7003609b
CC		 3389#ifndef CONFIG_MMU
3390unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3391 unsigned long len, unsigned long pgoff,
3392 unsigned long flags)
3393{
3394 return 0;
3395}
3396#else
3397# define dummy_get_unmapped_area NULL
3398#endif
3399
1da177e4
LT		 3400/*
3401 * Register section
3402 */
3403
9c2e08c5 3404const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3405 {
2af677fc
CL		 3406 .owner = THIS_MODULE,
3407 .write = snd_pcm_write,
ee0b3e67 3408 .aio_write = snd_pcm_aio_write,
f87135f5 3409 .open = snd_pcm_playback_open,
2af677fc
CL		 3410 .release = snd_pcm_release,
3411 .poll = snd_pcm_playback_poll,
3412 .unlocked_ioctl = snd_pcm_playback_ioctl,
3413 .compat_ioctl = snd_pcm_ioctl_compat,
3414 .mmap = snd_pcm_mmap,
3415 .fasync = snd_pcm_fasync,
7003609b 3416 .get_unmapped_area = dummy_get_unmapped_area,
1da177e4
LT		 3417 },
3418 {
2af677fc
CL		 3419 .owner = THIS_MODULE,
3420 .read = snd_pcm_read,
ee0b3e67 3421 .aio_read = snd_pcm_aio_read,
f87135f5 3422 .open = snd_pcm_capture_open,
2af677fc
CL		 3423 .release = snd_pcm_release,
3424 .poll = snd_pcm_capture_poll,
3425 .unlocked_ioctl = snd_pcm_capture_ioctl,
3426 .compat_ioctl = snd_pcm_ioctl_compat,
3427 .mmap = snd_pcm_mmap,
3428 .fasync = snd_pcm_fasync,
7003609b 3429 .get_unmapped_area = dummy_get_unmapped_area,
1da177e4
LT		 3430 }
3431};
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