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mm: prepare VM_DONTDUMP for using in drivers
[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>
da155d5b 23#include <linux/module.h>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
26#include <linux/time.h>
e8db0be1 27#include <linux/pm_qos.h>
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>
9fe17b5d
TI		 38#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39#include <dma-coherence.h>
40#endif
1da177e4
LT		 41
42/*
43 * Compatibility
44 */
45
877211f5 46struct snd_pcm_hw_params_old {
1da177e4
LT		 47 unsigned int flags;
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 unsigned int rmask;
53 unsigned int cmask;
54 unsigned int info;
55 unsigned int msbits;
56 unsigned int rate_num;
57 unsigned int rate_den;
877211f5 58 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 59 unsigned char reserved[64];
60};
61
59d48582 62#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 63#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 65
877211f5
TI		 66static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 70#endif
f87135f5 71static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 72
73/*
74 *
75 */
76
77DEFINE_RWLOCK(snd_pcm_link_rwlock);
e88e8ae6 78EXPORT_SYMBOL(snd_pcm_link_rwlock);
1da177e4 79
e88e8ae6 80static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4
LT		 81
82static inline mm_segment_t snd_enter_user(void)
83{
84 mm_segment_t fs = get_fs();
85 set_fs(get_ds());
86 return fs;
87}
88
89static inline void snd_leave_user(mm_segment_t fs)
90{
91 set_fs(fs);
92}
93
94
95
877211f5 96int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 97{
877211f5
TI		 98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 101
1da177e4
LT		 102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
116 if (runtime) {
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119 }
120 return 0;
121}
122
877211f5
TI		 123int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
1da177e4 125{
877211f5 126 struct snd_pcm_info *info;
1da177e4
LT		 127 int err;
128
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
130 if (! info)
131 return -ENOMEM;
132 err = snd_pcm_info(substream, info);
133 if (err >= 0) {
134 if (copy_to_user(_info, info, sizeof(*info)))
135 err = -EFAULT;
136 }
137 kfree(info);
138 return err;
139}
140
141#undef RULES_DEBUG
142
143#ifdef RULES_DEBUG
144#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
47023ec7 145static const char * const snd_pcm_hw_param_names[] = {
1da177e4
LT		 146 HW_PARAM(ACCESS),
147 HW_PARAM(FORMAT),
148 HW_PARAM(SUBFORMAT),
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
151 HW_PARAM(CHANNELS),
152 HW_PARAM(RATE),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
156 HW_PARAM(PERIODS),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
160 HW_PARAM(TICK_TIME),
161};
162#endif
163
877211f5
TI		 164int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
1da177e4
LT		 166{
167 unsigned int k;
877211f5
TI		 168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
175 int changed, again;
176
177 params->info = 0;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 params->msbits = 0;
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
184 }
185
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
189 return -EINVAL;
190 if (!(params->rmask & (1 << k)))
191 continue;
192#ifdef RULES_DEBUG
006de267 193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195#endif
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197#ifdef RULES_DEBUG
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199#endif
200 if (changed)
201 params->cmask |= 1 << k;
202 if (changed < 0)
203 return changed;
204 }
205
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
209 return -EINVAL;
210 if (!(params->rmask & (1 << k)))
211 continue;
212#ifdef RULES_DEBUG
006de267 213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 214 if (i->empty)
215 printk("empty");
216 else
217 printk("%c%u %u%c",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220 printk(" -> ");
221#endif
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
223#ifdef RULES_DEBUG
224 if (i->empty)
225 printk("empty\n");
226 else
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
230#endif
231 if (changed)
232 params->cmask |= 1 << k;
233 if (changed < 0)
234 return changed;
235 }
236
237 for (k = 0; k < constrs->rules_num; k++)
238 rstamps[k] = 0;
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241 do {
242 again = 0;
243 for (k = 0; k < constrs->rules_num; k++) {
877211f5 244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 245 unsigned int d;
246 int doit = 0;
247 if (r->cond && !(r->cond & params->flags))
248 continue;
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
251 doit = 1;
252 break;
253 }
254 }
255 if (!doit)
256 continue;
257#ifdef RULES_DEBUG
006de267 258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
1da177e4
LT		 259 if (r->var >= 0) {
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
264 } else {
265 i = hw_param_interval(params, r->var);
266 if (i->empty)
267 printk("empty");
268 else
269 printk("%c%u %u%c",
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
272 }
273 }
274#endif
275 changed = r->func(params, r);
276#ifdef RULES_DEBUG
277 if (r->var >= 0) {
278 printk(" -> ");
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
281 else {
282 if (i->empty)
283 printk("empty");
284 else
285 printk("%c%u %u%c",
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
288 }
289 }
290 printk("\n");
291#endif
292 rstamps[k] = stamp;
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
296 again = 1;
297 }
298 if (changed < 0)
299 return changed;
300 stamp++;
301 }
302 } while (again);
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
307 }
308
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
314 }
315 }
316
317 hw = &substream->runtime->hw;
318 if (!params->info)
8bea869c
JK		 319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
3be522a9
JK		 321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 327 if (changed < 0)
8bea869c
JK		 328 return changed;
329 }
330 }
1da177e4
LT		 331 params->rmask = 0;
332 return 0;
333}
334
e88e8ae6
TI		 335EXPORT_SYMBOL(snd_pcm_hw_refine);
336
877211f5
TI		 337static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
1da177e4 339{
877211f5 340 struct snd_pcm_hw_params *params;
1da177e4
LT		 341 int err;
342
ef44a1ec
LZ		 343 params = memdup_user(_params, sizeof(*params));
344 if (IS_ERR(params))
345 return PTR_ERR(params);
346
1da177e4
LT		 347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
349 if (!err)
350 err = -EFAULT;
351 }
ef44a1ec 352
1da177e4
LT		 353 kfree(params);
354 return err;
355}
356
9442e691
TI		 357static int period_to_usecs(struct snd_pcm_runtime *runtime)
358{
359 int usecs;
360
361 if (! runtime->rate)
362 return -1; /* invalid */
363
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
367 runtime->rate;
368
369 return usecs;
370}
371
877211f5
TI		 372static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
373 struct snd_pcm_hw_params *params)
1da177e4 374{
877211f5 375 struct snd_pcm_runtime *runtime;
9442e691 376 int err, usecs;
1da177e4
LT		 377 unsigned int bits;
378 snd_pcm_uframes_t frames;
379
7eaa943c
TI		 380 if (PCM_RUNTIME_CHECK(substream))
381 return -ENXIO;
1da177e4 382 runtime = substream->runtime;
1da177e4
LT		 383 snd_pcm_stream_lock_irq(substream);
384 switch (runtime->status->state) {
385 case SNDRV_PCM_STATE_OPEN:
386 case SNDRV_PCM_STATE_SETUP:
387 case SNDRV_PCM_STATE_PREPARED:
388 break;
389 default:
390 snd_pcm_stream_unlock_irq(substream);
391 return -EBADFD;
392 }
393 snd_pcm_stream_unlock_irq(substream);
394#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
395 if (!substream->oss.oss)
396#endif
9c323fcb 397 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 398 return -EBADFD;
399
400 params->rmask = ~0U;
401 err = snd_pcm_hw_refine(substream, params);
402 if (err < 0)
403 goto _error;
404
405 err = snd_pcm_hw_params_choose(substream, params);
406 if (err < 0)
407 goto _error;
408
409 if (substream->ops->hw_params != NULL) {
410 err = substream->ops->hw_params(substream, params);
411 if (err < 0)
412 goto _error;
413 }
414
415 runtime->access = params_access(params);
416 runtime->format = params_format(params);
417 runtime->subformat = params_subformat(params);
418 runtime->channels = params_channels(params);
419 runtime->rate = params_rate(params);
420 runtime->period_size = params_period_size(params);
421 runtime->periods = params_periods(params);
422 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 423 runtime->info = params->info;
424 runtime->rate_num = params->rate_num;
425 runtime->rate_den = params->rate_den;
ab69a490
CL		 426 runtime->no_period_wakeup =
427 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
428 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 429
430 bits = snd_pcm_format_physical_width(runtime->format);
431 runtime->sample_bits = bits;
432 bits *= runtime->channels;
433 runtime->frame_bits = bits;
434 frames = 1;
435 while (bits % 8 != 0) {
436 bits *= 2;
437 frames *= 2;
438 }
439 runtime->byte_align = bits / 8;
440 runtime->min_align = frames;
441
442 /* Default sw params */
443 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
444 runtime->period_step = 1;
1da177e4 445 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 446 runtime->start_threshold = 1;
447 runtime->stop_threshold = runtime->buffer_size;
448 runtime->silence_threshold = 0;
449 runtime->silence_size = 0;
ead4046b
CL		 450 runtime->boundary = runtime->buffer_size;
451 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
452 runtime->boundary *= 2;
1da177e4
LT		 453
454 snd_pcm_timer_resolution_change(substream);
455 runtime->status->state = SNDRV_PCM_STATE_SETUP;
9442e691 456
82f68251
JB		 457 if (pm_qos_request_active(&substream->latency_pm_qos_req))
458 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 459 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 460 pm_qos_add_request(&substream->latency_pm_qos_req,
461 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 462 return 0;
463 _error:
25985edc 464 /* hardware might be unusable from this time,
1da177e4
LT		 465 so we force application to retry to set
466 the correct hardware parameter settings */
467 runtime->status->state = SNDRV_PCM_STATE_OPEN;
468 if (substream->ops->hw_free != NULL)
469 substream->ops->hw_free(substream);
470 return err;
471}
472
877211f5
TI		 473static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
474 struct snd_pcm_hw_params __user * _params)
1da177e4 475{
877211f5 476 struct snd_pcm_hw_params *params;
1da177e4
LT		 477 int err;
478
ef44a1ec
LZ		 479 params = memdup_user(_params, sizeof(*params));
480 if (IS_ERR(params))
481 return PTR_ERR(params);
482
1da177e4
LT		 483 err = snd_pcm_hw_params(substream, params);
484 if (copy_to_user(_params, params, sizeof(*params))) {
485 if (!err)
486 err = -EFAULT;
487 }
ef44a1ec 488
1da177e4
LT		 489 kfree(params);
490 return err;
491}
492
877211f5 493static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 494{
877211f5 495 struct snd_pcm_runtime *runtime;
1da177e4
LT		 496 int result = 0;
497
7eaa943c
TI		 498 if (PCM_RUNTIME_CHECK(substream))
499 return -ENXIO;
1da177e4 500 runtime = substream->runtime;
1da177e4
LT		 501 snd_pcm_stream_lock_irq(substream);
502 switch (runtime->status->state) {
503 case SNDRV_PCM_STATE_SETUP:
504 case SNDRV_PCM_STATE_PREPARED:
505 break;
506 default:
507 snd_pcm_stream_unlock_irq(substream);
508 return -EBADFD;
509 }
510 snd_pcm_stream_unlock_irq(substream);
9c323fcb 511 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 512 return -EBADFD;
513 if (substream->ops->hw_free)
514 result = substream->ops->hw_free(substream);
515 runtime->status->state = SNDRV_PCM_STATE_OPEN;
82f68251 516 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 517 return result;
518}
519
877211f5
TI		 520static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
521 struct snd_pcm_sw_params *params)
1da177e4 522{
877211f5 523 struct snd_pcm_runtime *runtime;
1250932e 524 int err;
1da177e4 525
7eaa943c
TI		 526 if (PCM_RUNTIME_CHECK(substream))
527 return -ENXIO;
1da177e4 528 runtime = substream->runtime;
1da177e4
LT		 529 snd_pcm_stream_lock_irq(substream);
530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
531 snd_pcm_stream_unlock_irq(substream);
532 return -EBADFD;
533 }
534 snd_pcm_stream_unlock_irq(substream);
535
536 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
537 return -EINVAL;
538 if (params->avail_min == 0)
539 return -EINVAL;
1da177e4
LT		 540 if (params->silence_size >= runtime->boundary) {
541 if (params->silence_threshold != 0)
542 return -EINVAL;
543 } else {
544 if (params->silence_size > params->silence_threshold)
545 return -EINVAL;
546 if (params->silence_threshold > runtime->buffer_size)
547 return -EINVAL;
548 }
1250932e 549 err = 0;
1da177e4
LT		 550 snd_pcm_stream_lock_irq(substream);
551 runtime->tstamp_mode = params->tstamp_mode;
1da177e4
LT		 552 runtime->period_step = params->period_step;
553 runtime->control->avail_min = params->avail_min;
554 runtime->start_threshold = params->start_threshold;
555 runtime->stop_threshold = params->stop_threshold;
556 runtime->silence_threshold = params->silence_threshold;
557 runtime->silence_size = params->silence_size;
1da177e4
LT		 558 params->boundary = runtime->boundary;
559 if (snd_pcm_running(substream)) {
1da177e4
LT		 560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
561 runtime->silence_size > 0)
562 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 563 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 564 }
565 snd_pcm_stream_unlock_irq(substream);
1250932e 566 return err;
1da177e4
LT		 567}
568
877211f5
TI		 569static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
570 struct snd_pcm_sw_params __user * _params)
1da177e4 571{
877211f5 572 struct snd_pcm_sw_params params;
1da177e4
LT		 573 int err;
574 if (copy_from_user(&params, _params, sizeof(params)))
575 return -EFAULT;
576 err = snd_pcm_sw_params(substream, &params);
577 if (copy_to_user(_params, &params, sizeof(params)))
578 return -EFAULT;
579 return err;
580}
581
877211f5
TI		 582int snd_pcm_status(struct snd_pcm_substream *substream,
583 struct snd_pcm_status *status)
1da177e4 584{
877211f5 585 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 586
587 snd_pcm_stream_lock_irq(substream);
588 status->state = runtime->status->state;
589 status->suspended_state = runtime->status->suspended_state;
590 if (status->state == SNDRV_PCM_STATE_OPEN)
591 goto _end;
592 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 593 if (snd_pcm_running(substream)) {
1da177e4 594 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 595 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
596 status->tstamp = runtime->status->tstamp;
597 goto _tstamp_end;
598 }
599 }
a713b583 600 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 601 _tstamp_end:
1da177e4
LT		 602 status->appl_ptr = runtime->control->appl_ptr;
603 status->hw_ptr = runtime->status->hw_ptr;
604 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
605 status->avail = snd_pcm_playback_avail(runtime);
606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 607 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 608 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 609 status->delay += runtime->delay;
610 } else
1da177e4
LT		 611 status->delay = 0;
612 } else {
613 status->avail = snd_pcm_capture_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 615 status->delay = status->avail + runtime->delay;
1da177e4
LT		 616 else
617 status->delay = 0;
618 }
619 status->avail_max = runtime->avail_max;
620 status->overrange = runtime->overrange;
621 runtime->avail_max = 0;
622 runtime->overrange = 0;
623 _end:
624 snd_pcm_stream_unlock_irq(substream);
625 return 0;
626}
627
877211f5
TI		 628static int snd_pcm_status_user(struct snd_pcm_substream *substream,
629 struct snd_pcm_status __user * _status)
1da177e4 630{
877211f5 631 struct snd_pcm_status status;
1da177e4
LT		 632 int res;
633
1da177e4
LT		 634 memset(&status, 0, sizeof(status));
635 res = snd_pcm_status(substream, &status);
636 if (res < 0)
637 return res;
638 if (copy_to_user(_status, &status, sizeof(status)))
639 return -EFAULT;
640 return 0;
641}
642
877211f5
TI		 643static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
644 struct snd_pcm_channel_info * info)
1da177e4 645{
877211f5 646 struct snd_pcm_runtime *runtime;
1da177e4
LT		 647 unsigned int channel;
648
1da177e4
LT		 649 channel = info->channel;
650 runtime = substream->runtime;
651 snd_pcm_stream_lock_irq(substream);
652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
653 snd_pcm_stream_unlock_irq(substream);
654 return -EBADFD;
655 }
656 snd_pcm_stream_unlock_irq(substream);
657 if (channel >= runtime->channels)
658 return -EINVAL;
659 memset(info, 0, sizeof(*info));
660 info->channel = channel;
661 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
662}
663
877211f5
TI		 664static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
665 struct snd_pcm_channel_info __user * _info)
1da177e4 666{
877211f5 667 struct snd_pcm_channel_info info;
1da177e4
LT		 668 int res;
669
670 if (copy_from_user(&info, _info, sizeof(info)))
671 return -EFAULT;
672 res = snd_pcm_channel_info(substream, &info);
673 if (res < 0)
674 return res;
675 if (copy_to_user(_info, &info, sizeof(info)))
676 return -EFAULT;
677 return 0;
678}
679
877211f5 680static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 681{
877211f5 682 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 683 if (runtime->trigger_master == NULL)
684 return;
685 if (runtime->trigger_master == substream) {
b751eef1 686 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 687 } else {
688 snd_pcm_trigger_tstamp(runtime->trigger_master);
689 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
690 }
691 runtime->trigger_master = NULL;
692}
693
694struct action_ops {
877211f5
TI		 695 int (*pre_action)(struct snd_pcm_substream *substream, int state);
696 int (*do_action)(struct snd_pcm_substream *substream, int state);
697 void (*undo_action)(struct snd_pcm_substream *substream, int state);
698 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 699};
700
701/*
702 * this functions is core for handling of linked stream
703 * Note: the stream state might be changed also on failure
704 * Note2: call with calling stream lock + link lock
705 */
706static int snd_pcm_action_group(struct action_ops *ops,
877211f5 707 struct snd_pcm_substream *substream,
1da177e4
LT		 708 int state, int do_lock)
709{
877211f5
TI		 710 struct snd_pcm_substream *s = NULL;
711 struct snd_pcm_substream *s1;
1da177e4
LT		 712 int res = 0;
713
ef991b95 714 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 715 if (do_lock && s != substream)
208eee2a
FD		 716 spin_lock_nested(&s->self_group.lock,
717 SINGLE_DEPTH_NESTING);
1da177e4
LT		 718 res = ops->pre_action(s, state);
719 if (res < 0)
720 goto _unlock;
721 }
ef991b95 722 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 723 res = ops->do_action(s, state);
724 if (res < 0) {
725 if (ops->undo_action) {
ef991b95 726 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 727 if (s1 == s) /* failed stream */
728 break;
729 ops->undo_action(s1, state);
730 }
731 }
732 s = NULL; /* unlock all */
733 goto _unlock;
734 }
735 }
ef991b95 736 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 737 ops->post_action(s, state);
738 }
739 _unlock:
740 if (do_lock) {
741 /* unlock streams */
ef991b95 742 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 743 if (s1 != substream)
744 spin_unlock(&s1->self_group.lock);
745 if (s1 == s) /* end */
746 break;
747 }
748 }
749 return res;
750}
751
752/*
753 * Note: call with stream lock
754 */
755static int snd_pcm_action_single(struct action_ops *ops,
877211f5 756 struct snd_pcm_substream *substream,
1da177e4
LT		 757 int state)
758{
759 int res;
760
761 res = ops->pre_action(substream, state);
762 if (res < 0)
763 return res;
764 res = ops->do_action(substream, state);
765 if (res == 0)
766 ops->post_action(substream, state);
767 else if (ops->undo_action)
768 ops->undo_action(substream, state);
769 return res;
770}
771
772/*
773 * Note: call with stream lock
774 */
775static int snd_pcm_action(struct action_ops *ops,
877211f5 776 struct snd_pcm_substream *substream,
1da177e4
LT		 777 int state)
778{
779 int res;
780
781 if (snd_pcm_stream_linked(substream)) {
782 if (!spin_trylock(&substream->group->lock)) {
783 spin_unlock(&substream->self_group.lock);
784 spin_lock(&substream->group->lock);
785 spin_lock(&substream->self_group.lock);
786 }
787 res = snd_pcm_action_group(ops, substream, state, 1);
788 spin_unlock(&substream->group->lock);
789 } else {
790 res = snd_pcm_action_single(ops, substream, state);
791 }
792 return res;
793}
794
795/*
796 * Note: don't use any locks before
797 */
798static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 799 struct snd_pcm_substream *substream,
1da177e4
LT		 800 int state)
801{
802 int res;
803
804 read_lock_irq(&snd_pcm_link_rwlock);
805 if (snd_pcm_stream_linked(substream)) {
806 spin_lock(&substream->group->lock);
807 spin_lock(&substream->self_group.lock);
808 res = snd_pcm_action_group(ops, substream, state, 1);
809 spin_unlock(&substream->self_group.lock);
810 spin_unlock(&substream->group->lock);
811 } else {
812 spin_lock(&substream->self_group.lock);
813 res = snd_pcm_action_single(ops, substream, state);
814 spin_unlock(&substream->self_group.lock);
815 }
816 read_unlock_irq(&snd_pcm_link_rwlock);
817 return res;
818}
819
820/*
821 */
822static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 823 struct snd_pcm_substream *substream,
1da177e4
LT		 824 int state)
825{
826 int res;
827
828 down_read(&snd_pcm_link_rwsem);
829 if (snd_pcm_stream_linked(substream))
830 res = snd_pcm_action_group(ops, substream, state, 0);
831 else
832 res = snd_pcm_action_single(ops, substream, state);
833 up_read(&snd_pcm_link_rwsem);
834 return res;
835}
836
837/*
838 * start callbacks
839 */
877211f5 840static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 841{
877211f5 842 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 843 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
844 return -EBADFD;
845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
846 !snd_pcm_playback_data(substream))
847 return -EPIPE;
848 runtime->trigger_master = substream;
849 return 0;
850}
851
877211f5 852static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 853{
854 if (substream->runtime->trigger_master != substream)
855 return 0;
856 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
857}
858
877211f5 859static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 860{
861 if (substream->runtime->trigger_master == substream)
862 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
863}
864
877211f5 865static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 866{
877211f5 867 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 868 snd_pcm_trigger_tstamp(substream);
6af3fb72 869 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 870 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
871 runtime->rate;
1da177e4
LT		 872 runtime->status->state = state;
873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
874 runtime->silence_size > 0)
875 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 876 if (substream->timer)
877211f5
TI		 877 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
878 &runtime->trigger_tstamp);
1da177e4
LT		 879}
880
881static struct action_ops snd_pcm_action_start = {
882 .pre_action = snd_pcm_pre_start,
883 .do_action = snd_pcm_do_start,
884 .undo_action = snd_pcm_undo_start,
885 .post_action = snd_pcm_post_start
886};
887
888/**
1c85cc64 889 * snd_pcm_start - start all linked streams
df8db936 890 * @substream: the PCM substream instance
1da177e4 891 */
877211f5 892int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 893{
877211f5
TI		 894 return snd_pcm_action(&snd_pcm_action_start, substream,
895 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 896}
897
898/*
899 * stop callbacks
900 */
877211f5 901static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 902{
877211f5 903 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
905 return -EBADFD;
906 runtime->trigger_master = substream;
907 return 0;
908}
909
877211f5 910static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 911{
912 if (substream->runtime->trigger_master == substream &&
913 snd_pcm_running(substream))
914 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
915 return 0; /* unconditonally stop all substreams */
916}
917
877211f5 918static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 919{
877211f5 920 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 921 if (runtime->status->state != state) {
922 snd_pcm_trigger_tstamp(substream);
923 if (substream->timer)
877211f5
TI		 924 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
925 &runtime->trigger_tstamp);
1da177e4 926 runtime->status->state = state;
1da177e4
LT		 927 }
928 wake_up(&runtime->sleep);
c91a988d 929 wake_up(&runtime->tsleep);
1da177e4
LT		 930}
931
932static struct action_ops snd_pcm_action_stop = {
933 .pre_action = snd_pcm_pre_stop,
934 .do_action = snd_pcm_do_stop,
935 .post_action = snd_pcm_post_stop
936};
937
938/**
1c85cc64 939 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 940 * @substream: the PCM substream instance
941 * @state: PCM state after stopping the stream
1da177e4 942 *
1c85cc64 943 * The state of each stream is then changed to the given state unconditionally.
1da177e4 944 */
fea952e5 945int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 946{
947 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
948}
949
e88e8ae6
TI		 950EXPORT_SYMBOL(snd_pcm_stop);
951
1da177e4 952/**
1c85cc64 953 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 954 * @substream: the PCM substream
1da177e4 955 *
1c85cc64 956 * After stopping, the state is changed to SETUP.
1da177e4
LT		 957 * Unlike snd_pcm_stop(), this affects only the given stream.
958 */
877211f5 959int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 960{
877211f5
TI		 961 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
962 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 963}
964
965/*
966 * pause callbacks
967 */
877211f5 968static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 969{
877211f5 970 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 971 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
972 return -ENOSYS;
973 if (push) {
974 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
975 return -EBADFD;
976 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
977 return -EBADFD;
978 runtime->trigger_master = substream;
979 return 0;
980}
981
877211f5 982static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 983{
984 if (substream->runtime->trigger_master != substream)
985 return 0;
56385a12
JK		 986 /* some drivers might use hw_ptr to recover from the pause -
987 update the hw_ptr now */
988 if (push)
989 snd_pcm_update_hw_ptr(substream);
6af3fb72 990 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 991 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 992 * delta, effectively to skip the check once.
993 */
994 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 995 return substream->ops->trigger(substream,
996 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
997 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
998}
999
877211f5 1000static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1001{
1002 if (substream->runtime->trigger_master == substream)
1003 substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1005 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1006}
1007
877211f5 1008static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1009{
877211f5 1010 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1011 snd_pcm_trigger_tstamp(substream);
1012 if (push) {
1013 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1014 if (substream->timer)
877211f5
TI		 1015 snd_timer_notify(substream->timer,
1016 SNDRV_TIMER_EVENT_MPAUSE,
1017 &runtime->trigger_tstamp);
1da177e4 1018 wake_up(&runtime->sleep);
c91a988d 1019 wake_up(&runtime->tsleep);
1da177e4
LT		 1020 } else {
1021 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1022 if (substream->timer)
877211f5
TI		 1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MCONTINUE,
1025 &runtime->trigger_tstamp);
1da177e4
LT		 1026 }
1027}
1028
1029static struct action_ops snd_pcm_action_pause = {
1030 .pre_action = snd_pcm_pre_pause,
1031 .do_action = snd_pcm_do_pause,
1032 .undo_action = snd_pcm_undo_pause,
1033 .post_action = snd_pcm_post_pause
1034};
1035
1036/*
1037 * Push/release the pause for all linked streams.
1038 */
877211f5 1039static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1040{
1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1042}
1043
1044#ifdef CONFIG_PM
1045/* suspend */
1046
877211f5 1047static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1048{
877211f5 1049 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1051 return -EBUSY;
1052 runtime->trigger_master = substream;
1053 return 0;
1054}
1055
877211f5 1056static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1057{
877211f5 1058 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1059 if (runtime->trigger_master != substream)
1060 return 0;
1061 if (! snd_pcm_running(substream))
1062 return 0;
1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1064 return 0; /* suspend unconditionally */
1065}
1066
877211f5 1067static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1068{
877211f5 1069 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1070 snd_pcm_trigger_tstamp(substream);
1071 if (substream->timer)
877211f5
TI		 1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1073 &runtime->trigger_tstamp);
1da177e4
LT		 1074 runtime->status->suspended_state = runtime->status->state;
1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1076 wake_up(&runtime->sleep);
c91a988d 1077 wake_up(&runtime->tsleep);
1da177e4
LT		 1078}
1079
1080static struct action_ops snd_pcm_action_suspend = {
1081 .pre_action = snd_pcm_pre_suspend,
1082 .do_action = snd_pcm_do_suspend,
1083 .post_action = snd_pcm_post_suspend
1084};
1085
1086/**
1c85cc64 1087 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1088 * @substream: the PCM substream
1da177e4 1089 *
1da177e4
LT		 1090 * After this call, all streams are changed to SUSPENDED state.
1091 */
877211f5 1092int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1093{
1094 int err;
1095 unsigned long flags;
1096
603bf524
TI		 1097 if (! substream)
1098 return 0;
1099
1da177e4
LT		 1100 snd_pcm_stream_lock_irqsave(substream, flags);
1101 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1102 snd_pcm_stream_unlock_irqrestore(substream, flags);
1103 return err;
1104}
1105
e88e8ae6
TI		 1106EXPORT_SYMBOL(snd_pcm_suspend);
1107
1da177e4 1108/**
1c85cc64 1109 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1110 * @pcm: the PCM instance
1da177e4 1111 *
1da177e4
LT		 1112 * After this call, all streams are changed to SUSPENDED state.
1113 */
877211f5 1114int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1115{
877211f5 1116 struct snd_pcm_substream *substream;
1da177e4
LT		 1117 int stream, err = 0;
1118
603bf524
TI		 1119 if (! pcm)
1120 return 0;
1121
1da177e4 1122 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1123 for (substream = pcm->streams[stream].substream;
1124 substream; substream = substream->next) {
1da177e4
LT		 1125 /* FIXME: the open/close code should lock this as well */
1126 if (substream->runtime == NULL)
1127 continue;
1128 err = snd_pcm_suspend(substream);
1129 if (err < 0 && err != -EBUSY)
1130 return err;
1131 }
1132 }
1133 return 0;
1134}
1135
e88e8ae6
TI		 1136EXPORT_SYMBOL(snd_pcm_suspend_all);
1137
1da177e4
LT		 1138/* resume */
1139
877211f5 1140static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1141{
877211f5 1142 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1143 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1144 return -ENOSYS;
1145 runtime->trigger_master = substream;
1146 return 0;
1147}
1148
877211f5 1149static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1150{
877211f5 1151 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1152 if (runtime->trigger_master != substream)
1153 return 0;
1154 /* DMA not running previously? */
1155 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1156 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1157 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1158 return 0;
1159 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1160}
1161
877211f5 1162static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1163{
1164 if (substream->runtime->trigger_master == substream &&
1165 snd_pcm_running(substream))
1166 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1167}
1168
877211f5 1169static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1170{
877211f5 1171 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1172 snd_pcm_trigger_tstamp(substream);
1173 if (substream->timer)
877211f5
TI		 1174 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1175 &runtime->trigger_tstamp);
1da177e4 1176 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1177}
1178
1179static struct action_ops snd_pcm_action_resume = {
1180 .pre_action = snd_pcm_pre_resume,
1181 .do_action = snd_pcm_do_resume,
1182 .undo_action = snd_pcm_undo_resume,
1183 .post_action = snd_pcm_post_resume
1184};
1185
877211f5 1186static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1187{
877211f5 1188 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1189 int res;
1190
1191 snd_power_lock(card);
cbac4b0c 1192 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1193 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1194 snd_power_unlock(card);
1195 return res;
1196}
1197
1198#else
1199
877211f5 1200static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1201{
1202 return -ENOSYS;
1203}
1204
1205#endif /* CONFIG_PM */
1206
1207/*
1208 * xrun ioctl
1209 *
1210 * Change the RUNNING stream(s) to XRUN state.
1211 */
877211f5 1212static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1213{
877211f5
TI		 1214 struct snd_card *card = substream->pcm->card;
1215 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1216 int result;
1217
1218 snd_power_lock(card);
1219 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1220 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1221 if (result < 0)
1222 goto _unlock;
1223 }
1224
1225 snd_pcm_stream_lock_irq(substream);
1226 switch (runtime->status->state) {
1227 case SNDRV_PCM_STATE_XRUN:
1228 result = 0; /* already there */
1229 break;
1230 case SNDRV_PCM_STATE_RUNNING:
1231 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1232 break;
1233 default:
1234 result = -EBADFD;
1235 }
1236 snd_pcm_stream_unlock_irq(substream);
1237 _unlock:
1238 snd_power_unlock(card);
1239 return result;
1240}
1241
1242/*
1243 * reset ioctl
1244 */
877211f5 1245static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1246{
877211f5 1247 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1248 switch (runtime->status->state) {
1249 case SNDRV_PCM_STATE_RUNNING:
1250 case SNDRV_PCM_STATE_PREPARED:
1251 case SNDRV_PCM_STATE_PAUSED:
1252 case SNDRV_PCM_STATE_SUSPENDED:
1253 return 0;
1254 default:
1255 return -EBADFD;
1256 }
1257}
1258
877211f5 1259static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1260{
877211f5 1261 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1262 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1263 if (err < 0)
1264 return err;
1da177e4 1265 runtime->hw_ptr_base = 0;
e7636925
JK		 1266 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1267 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1268 runtime->silence_start = runtime->status->hw_ptr;
1269 runtime->silence_filled = 0;
1270 return 0;
1271}
1272
877211f5 1273static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1274{
877211f5 1275 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1276 runtime->control->appl_ptr = runtime->status->hw_ptr;
1277 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1278 runtime->silence_size > 0)
1279 snd_pcm_playback_silence(substream, ULONG_MAX);
1280}
1281
1282static struct action_ops snd_pcm_action_reset = {
1283 .pre_action = snd_pcm_pre_reset,
1284 .do_action = snd_pcm_do_reset,
1285 .post_action = snd_pcm_post_reset
1286};
1287
877211f5 1288static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1289{
1290 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1291}
1292
1293/*
1294 * prepare ioctl
1295 */
0df63e44
TI		 1296/* we use the second argument for updating f_flags */
1297static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1298 int f_flags)
1da177e4 1299{
877211f5 1300 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1301 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1302 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1303 return -EBADFD;
1304 if (snd_pcm_running(substream))
1305 return -EBUSY;
0df63e44 1306 substream->f_flags = f_flags;
1da177e4
LT		 1307 return 0;
1308}
1309
877211f5 1310static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1311{
1312 int err;
1313 err = substream->ops->prepare(substream);
1314 if (err < 0)
1315 return err;
1316 return snd_pcm_do_reset(substream, 0);
1317}
1318
877211f5 1319static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1320{
877211f5 1321 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1322 runtime->control->appl_ptr = runtime->status->hw_ptr;
1323 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1324}
1325
1326static struct action_ops snd_pcm_action_prepare = {
1327 .pre_action = snd_pcm_pre_prepare,
1328 .do_action = snd_pcm_do_prepare,
1329 .post_action = snd_pcm_post_prepare
1330};
1331
1332/**
1c85cc64 1333 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1334 * @substream: the PCM substream instance
0df63e44 1335 * @file: file to refer f_flags
1da177e4 1336 */
0df63e44
TI		 1337static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1338 struct file *file)
1da177e4
LT		 1339{
1340 int res;
877211f5 1341 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1342 int f_flags;
1343
1344 if (file)
1345 f_flags = file->f_flags;
1346 else
1347 f_flags = substream->f_flags;
1da177e4
LT		 1348
1349 snd_power_lock(card);
cbac4b0c 1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1351 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1352 substream, f_flags);
1da177e4
LT		 1353 snd_power_unlock(card);
1354 return res;
1355}
1356
1357/*
1358 * drain ioctl
1359 */
1360
877211f5 1361static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1362{
4f7c39dc
TI		 1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364 switch (runtime->status->state) {
1365 case SNDRV_PCM_STATE_OPEN:
1366 case SNDRV_PCM_STATE_DISCONNECTED:
1367 case SNDRV_PCM_STATE_SUSPENDED:
1368 return -EBADFD;
1369 }
1370 runtime->trigger_master = substream;
1da177e4
LT		 1371 return 0;
1372}
1373
877211f5 1374static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1375{
877211f5 1376 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1377 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1378 switch (runtime->status->state) {
1379 case SNDRV_PCM_STATE_PREPARED:
1380 /* start playback stream if possible */
1381 if (! snd_pcm_playback_empty(substream)) {
1382 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1383 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1384 }
1385 break;
1386 case SNDRV_PCM_STATE_RUNNING:
1387 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1388 break;
4f7c39dc
TI		 1389 case SNDRV_PCM_STATE_XRUN:
1390 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1391 break;
1da177e4
LT		 1392 default:
1393 break;
1394 }
1395 } else {
1396 /* stop running stream */
1397 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1398 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1399 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1400 snd_pcm_do_stop(substream, new_state);
1401 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1402 }
1403 }
1404 return 0;
1405}
1406
877211f5 1407static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1408{
1409}
1410
1411static struct action_ops snd_pcm_action_drain_init = {
1412 .pre_action = snd_pcm_pre_drain_init,
1413 .do_action = snd_pcm_do_drain_init,
1414 .post_action = snd_pcm_post_drain_init
1415};
1416
877211f5 1417static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1418
1419/*
1420 * Drain the stream(s).
1421 * When the substream is linked, sync until the draining of all playback streams
1422 * is finished.
1423 * After this call, all streams are supposed to be either SETUP or DRAINING
1424 * (capture only) state.
1425 */
4cdc115f
TI		 1426static int snd_pcm_drain(struct snd_pcm_substream *substream,
1427 struct file *file)
1da177e4 1428{
877211f5
TI		 1429 struct snd_card *card;
1430 struct snd_pcm_runtime *runtime;
ef991b95 1431 struct snd_pcm_substream *s;
d3a7dcfe 1432 wait_queue_t wait;
1da177e4 1433 int result = 0;
4cdc115f 1434 int nonblock = 0;
1da177e4 1435
1da177e4
LT		 1436 card = substream->pcm->card;
1437 runtime = substream->runtime;
1438
1439 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1440 return -EBADFD;
1441
1da177e4
LT		 1442 snd_power_lock(card);
1443 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1444 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1445 if (result < 0) {
1446 snd_power_unlock(card);
1447 return result;
1448 }
1da177e4
LT		 1449 }
1450
4cdc115f
TI		 1451 if (file) {
1452 if (file->f_flags & O_NONBLOCK)
1453 nonblock = 1;
1454 } else if (substream->f_flags & O_NONBLOCK)
1455 nonblock = 1;
1456
21cb2a2e 1457 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1458 snd_pcm_stream_lock_irq(substream);
1459 /* resume pause */
d3a7dcfe 1460 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1461 snd_pcm_pause(substream, 0);
1462
1463 /* pre-start/stop - all running streams are changed to DRAINING state */
1464 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1465 if (result < 0)
1466 goto unlock;
1467 /* in non-blocking, we don't wait in ioctl but let caller poll */
1468 if (nonblock) {
1469 result = -EAGAIN;
1470 goto unlock;
21cb2a2e 1471 }
1da177e4
LT		 1472
1473 for (;;) {
1474 long tout;
d3a7dcfe 1475 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1476 if (signal_pending(current)) {
1477 result = -ERESTARTSYS;
1478 break;
1479 }
d3a7dcfe
TI		 1480 /* find a substream to drain */
1481 to_check = NULL;
1482 snd_pcm_group_for_each_entry(s, substream) {
1483 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1484 continue;
1485 runtime = s->runtime;
1486 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1487 to_check = runtime;
21cb2a2e 1488 break;
d3a7dcfe 1489 }
21cb2a2e 1490 }
d3a7dcfe
TI		 1491 if (!to_check)
1492 break; /* all drained */
1493 init_waitqueue_entry(&wait, current);
1494 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1495 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1496 up_read(&snd_pcm_link_rwsem);
1da177e4 1497 snd_power_unlock(card);
f2b3614c
TI		 1498 if (runtime->no_period_wakeup)
1499 tout = MAX_SCHEDULE_TIMEOUT;
1500 else {
1501 tout = 10;
1502 if (runtime->rate) {
1503 long t = runtime->period_size * 2 / runtime->rate;
1504 tout = max(t, tout);
1505 }
1506 tout = msecs_to_jiffies(tout * 1000);
1507 }
1508 tout = schedule_timeout_interruptible(tout);
1da177e4 1509 snd_power_lock(card);
d3a7dcfe 1510 down_read(&snd_pcm_link_rwsem);
1da177e4 1511 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1512 remove_wait_queue(&to_check->sleep, &wait);
1da177e4
LT		 1513 if (tout == 0) {
1514 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1515 result = -ESTRPIPE;
1516 else {
1517 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1518 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1519 result = -EIO;
1520 }
1521 break;
1522 }
1da177e4 1523 }
21cb2a2e 1524
4cdc115f 1525 unlock:
21cb2a2e 1526 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1527 up_read(&snd_pcm_link_rwsem);
1da177e4 1528 snd_power_unlock(card);
1da177e4
LT		 1529
1530 return result;
1531}
1532
1533/*
1534 * drop ioctl
1535 *
1536 * Immediately put all linked substreams into SETUP state.
1537 */
877211f5 1538static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1539{
877211f5 1540 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1541 int result = 0;
1542
7eaa943c
TI		 1543 if (PCM_RUNTIME_CHECK(substream))
1544 return -ENXIO;
1da177e4 1545 runtime = substream->runtime;
1da177e4 1546
de1b8b93 1547 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1548 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1549 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1550 return -EBADFD;
1551
1da177e4
LT		 1552 snd_pcm_stream_lock_irq(substream);
1553 /* resume pause */
1554 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1555 snd_pcm_pause(substream, 0);
1556
1557 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1558 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1559 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1560
1da177e4
LT		 1561 return result;
1562}
1563
1564
1565/* WARNING: Don't forget to fput back the file */
bdbf6943 1566static struct file *snd_pcm_file_fd(int fd, int *fput_needed)
1da177e4
LT		 1567{
1568 struct file *file;
1569 struct inode *inode;
f87135f5
CL		 1570 unsigned int minor;
1571
bdbf6943 1572 file = fget_light(fd, fput_needed);
1da177e4
LT		 1573 if (!file)
1574 return NULL;
7bc56323 1575 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1576 if (!S_ISCHR(inode->i_mode) ||
1577 imajor(inode) != snd_major) {
bdbf6943 1578 fput_light(file, *fput_needed);
1da177e4
LT		 1579 return NULL;
1580 }
1581 minor = iminor(inode);
f87135f5
CL		 1582 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1583 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
bdbf6943 1584 fput_light(file, *fput_needed);
1da177e4
LT		 1585 return NULL;
1586 }
1587 return file;
1588}
1589
1590/*
1591 * PCM link handling
1592 */
877211f5 1593static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1594{
1595 int res = 0;
1596 struct file *file;
877211f5
TI		 1597 struct snd_pcm_file *pcm_file;
1598 struct snd_pcm_substream *substream1;
1662591b 1599 struct snd_pcm_group *group;
bdbf6943 1600 int fput_needed;
1da177e4 1601
bdbf6943 1602 file = snd_pcm_file_fd(fd, &fput_needed);
1da177e4
LT		 1603 if (!file)
1604 return -EBADFD;
1605 pcm_file = file->private_data;
1606 substream1 = pcm_file->substream;
1662591b
TI		 1607 group = kmalloc(sizeof(*group), GFP_KERNEL);
1608 if (!group) {
1609 res = -ENOMEM;
1610 goto _nolock;
1611 }
1da177e4
LT		 1612 down_write(&snd_pcm_link_rwsem);
1613 write_lock_irq(&snd_pcm_link_rwlock);
1614 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1615 substream->runtime->status->state != substream1->runtime->status->state) {
1616 res = -EBADFD;
1617 goto _end;
1618 }
1619 if (snd_pcm_stream_linked(substream1)) {
1620 res = -EALREADY;
1621 goto _end;
1622 }
1623 if (!snd_pcm_stream_linked(substream)) {
1662591b 1624 substream->group = group;
1da177e4
LT		 1625 spin_lock_init(&substream->group->lock);
1626 INIT_LIST_HEAD(&substream->group->substreams);
1627 list_add_tail(&substream->link_list, &substream->group->substreams);
1628 substream->group->count = 1;
1629 }
1630 list_add_tail(&substream1->link_list, &substream->group->substreams);
1631 substream->group->count++;
1632 substream1->group = substream->group;
1633 _end:
1634 write_unlock_irq(&snd_pcm_link_rwlock);
1635 up_write(&snd_pcm_link_rwsem);
1662591b 1636 _nolock:
bdbf6943 1637 fput_light(file, fput_needed);
1662591b
TI		 1638 if (res < 0)
1639 kfree(group);
1da177e4
LT		 1640 return res;
1641}
1642
877211f5 1643static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1644{
1645 substream->group = &substream->self_group;
1646 INIT_LIST_HEAD(&substream->self_group.substreams);
1647 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1648}
1649
877211f5 1650static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1651{
ef991b95 1652 struct snd_pcm_substream *s;
1da177e4
LT		 1653 int res = 0;
1654
1655 down_write(&snd_pcm_link_rwsem);
1656 write_lock_irq(&snd_pcm_link_rwlock);
1657 if (!snd_pcm_stream_linked(substream)) {
1658 res = -EALREADY;
1659 goto _end;
1660 }
1661 list_del(&substream->link_list);
1662 substream->group->count--;
1663 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1664 snd_pcm_group_for_each_entry(s, substream) {
1665 relink_to_local(s);
1da177e4
LT		 1666 break;
1667 }
1668 kfree(substream->group);
1669 }
1670 relink_to_local(substream);
1671 _end:
1672 write_unlock_irq(&snd_pcm_link_rwlock);
1673 up_write(&snd_pcm_link_rwsem);
1674 return res;
1675}
1676
1677/*
1678 * hw configurator
1679 */
877211f5
TI		 1680static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1681 struct snd_pcm_hw_rule *rule)
1da177e4 1682{
877211f5 1683 struct snd_interval t;
1da177e4
LT		 1684 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1685 hw_param_interval_c(params, rule->deps[1]), &t);
1686 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1687}
1688
877211f5
TI		 1689static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1690 struct snd_pcm_hw_rule *rule)
1da177e4 1691{
877211f5 1692 struct snd_interval t;
1da177e4
LT		 1693 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1694 hw_param_interval_c(params, rule->deps[1]), &t);
1695 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1696}
1697
877211f5
TI		 1698static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1da177e4 1700{
877211f5 1701 struct snd_interval t;
1da177e4
LT		 1702 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1703 hw_param_interval_c(params, rule->deps[1]),
1704 (unsigned long) rule->private, &t);
1705 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1706}
1707
877211f5
TI		 1708static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1709 struct snd_pcm_hw_rule *rule)
1da177e4 1710{
877211f5 1711 struct snd_interval t;
1da177e4
LT		 1712 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1713 (unsigned long) rule->private,
1714 hw_param_interval_c(params, rule->deps[1]), &t);
1715 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1716}
1717
877211f5
TI		 1718static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1719 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1720{
1721 unsigned int k;
877211f5
TI		 1722 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1723 struct snd_mask m;
1724 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1725 snd_mask_any(&m);
1726 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1727 int bits;
1728 if (! snd_mask_test(mask, k))
1729 continue;
1730 bits = snd_pcm_format_physical_width(k);
1731 if (bits <= 0)
1732 continue; /* ignore invalid formats */
1733 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1734 snd_mask_reset(&m, k);
1735 }
1736 return snd_mask_refine(mask, &m);
1737}
1738
877211f5
TI		 1739static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1740 struct snd_pcm_hw_rule *rule)
1da177e4 1741{
877211f5 1742 struct snd_interval t;
1da177e4
LT		 1743 unsigned int k;
1744 t.min = UINT_MAX;
1745 t.max = 0;
1746 t.openmin = 0;
1747 t.openmax = 0;
1748 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1749 int bits;
1750 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1751 continue;
1752 bits = snd_pcm_format_physical_width(k);
1753 if (bits <= 0)
1754 continue; /* ignore invalid formats */
1755 if (t.min > (unsigned)bits)
1756 t.min = bits;
1757 if (t.max < (unsigned)bits)
1758 t.max = bits;
1759 }
1760 t.integer = 1;
1761 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1762}
1763
1764#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1765#error "Change this table"
1766#endif
1767
1768static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1769 48000, 64000, 88200, 96000, 176400, 192000 };
1770
7653d557
CL		 1771const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1772 .count = ARRAY_SIZE(rates),
1773 .list = rates,
1774};
1775
877211f5
TI		 1776static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1777 struct snd_pcm_hw_rule *rule)
1da177e4 1778{
877211f5 1779 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1780 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1781 snd_pcm_known_rates.count,
1782 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1783}
1784
877211f5
TI		 1785static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1786 struct snd_pcm_hw_rule *rule)
1da177e4 1787{
877211f5
TI		 1788 struct snd_interval t;
1789 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1790 t.min = 0;
1791 t.max = substream->buffer_bytes_max;
1792 t.openmin = 0;
1793 t.openmax = 0;
1794 t.integer = 1;
1795 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1796}
1797
877211f5 1798int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1799{
877211f5
TI		 1800 struct snd_pcm_runtime *runtime = substream->runtime;
1801 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1802 int k, err;
1803
1804 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1805 snd_mask_any(constrs_mask(constrs, k));
1806 }
1807
1808 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1809 snd_interval_any(constrs_interval(constrs, k));
1810 }
1811
1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1816 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1817
1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1819 snd_pcm_hw_rule_format, NULL,
1820 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1821 if (err < 0)
1822 return err;
1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1824 snd_pcm_hw_rule_sample_bits, NULL,
1825 SNDRV_PCM_HW_PARAM_FORMAT,
1826 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1827 if (err < 0)
1828 return err;
1829 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1830 snd_pcm_hw_rule_div, NULL,
1831 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1832 if (err < 0)
1833 return err;
1834 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1835 snd_pcm_hw_rule_mul, NULL,
1836 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1837 if (err < 0)
1838 return err;
1839 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1840 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1841 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1842 if (err < 0)
1843 return err;
1844 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1845 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1846 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1847 if (err < 0)
1848 return err;
1849 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1850 snd_pcm_hw_rule_div, NULL,
1851 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1852 if (err < 0)
1853 return err;
1854 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1855 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1856 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1857 if (err < 0)
1858 return err;
1859 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1860 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1861 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1862 if (err < 0)
1863 return err;
1864 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1865 snd_pcm_hw_rule_div, NULL,
1866 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1867 if (err < 0)
1868 return err;
1869 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1870 snd_pcm_hw_rule_div, NULL,
1871 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1872 if (err < 0)
1873 return err;
1874 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1875 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1876 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1877 if (err < 0)
1878 return err;
1879 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1880 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1881 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1882 if (err < 0)
1883 return err;
1884 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1885 snd_pcm_hw_rule_mul, NULL,
1886 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1887 if (err < 0)
1888 return err;
1889 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1890 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1891 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1892 if (err < 0)
1893 return err;
1894 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1895 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1896 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1897 if (err < 0)
1898 return err;
1899 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1900 snd_pcm_hw_rule_muldivk, (void*) 8,
1901 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1902 if (err < 0)
1903 return err;
1904 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1905 snd_pcm_hw_rule_muldivk, (void*) 8,
1906 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1907 if (err < 0)
1908 return err;
1909 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1910 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1911 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1912 if (err < 0)
1913 return err;
1914 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1915 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1916 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1917 if (err < 0)
1918 return err;
1919 return 0;
1920}
1921
877211f5 1922int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1923{
877211f5
TI		 1924 struct snd_pcm_runtime *runtime = substream->runtime;
1925 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1926 int err;
1927 unsigned int mask = 0;
1928
1929 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1930 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1931 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1932 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1933 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1934 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1935 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1936 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1937 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1938 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1939 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1940 }
1941 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 1942 if (err < 0)
1943 return err;
1da177e4
LT		 1944
1945 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 1946 if (err < 0)
1947 return err;
1da177e4
LT		 1948
1949 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 1950 if (err < 0)
1951 return err;
1da177e4
LT		 1952
1953 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1954 hw->channels_min, hw->channels_max);
7eaa943c
TI		 1955 if (err < 0)
1956 return err;
1da177e4
LT		 1957
1958 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1959 hw->rate_min, hw->rate_max);
8b90ca08
GL		 1960 if (err < 0)
1961 return err;
1da177e4
LT		 1962
1963 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1964 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 1965 if (err < 0)
1966 return err;
1da177e4
LT		 1967
1968 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1969 hw->periods_min, hw->periods_max);
7eaa943c
TI		 1970 if (err < 0)
1971 return err;
1da177e4
LT		 1972
1973 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1974 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 1975 if (err < 0)
1976 return err;
1da177e4
LT		 1977
1978 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1979 snd_pcm_hw_rule_buffer_bytes_max, substream,
1980 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1981 if (err < 0)
1982 return err;
1983
1984 /* FIXME: remove */
1985 if (runtime->dma_bytes) {
1986 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c
TI		 1987 if (err < 0)
1988 return -EINVAL;
1da177e4
LT		 1989 }
1990
1991 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1992 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1993 snd_pcm_hw_rule_rate, hw,
1994 SNDRV_PCM_HW_PARAM_RATE, -1);
1995 if (err < 0)
1996 return err;
1997 }
1998
1999 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2000 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2001
2002 return 0;
2003}
2004
3bf75f9b 2005static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2006{
1da177e4 2007 snd_pcm_unlink(substream);
3bf75f9b
TI		 2008}
2009
2010void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2011{
0df63e44
TI		 2012 substream->ref_count--;
2013 if (substream->ref_count > 0)
2014 return;
2015
3bf75f9b 2016 snd_pcm_drop(substream);
3bf75f9b 2017 if (substream->hw_opened) {
1da177e4
LT		 2018 if (substream->ops->hw_free != NULL)
2019 substream->ops->hw_free(substream);
2020 substream->ops->close(substream);
3bf75f9b 2021 substream->hw_opened = 0;
1da177e4 2022 }
8699a0b6
TI		 2023 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2024 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2025 if (substream->pcm_release) {
2026 substream->pcm_release(substream);
2027 substream->pcm_release = NULL;
2028 }
3bf75f9b
TI		 2029 snd_pcm_detach_substream(substream);
2030}
2031
e88e8ae6
TI		 2032EXPORT_SYMBOL(snd_pcm_release_substream);
2033
3bf75f9b
TI		 2034int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2035 struct file *file,
2036 struct snd_pcm_substream **rsubstream)
2037{
2038 struct snd_pcm_substream *substream;
2039 int err;
2040
2041 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2042 if (err < 0)
2043 return err;
0df63e44
TI		 2044 if (substream->ref_count > 1) {
2045 *rsubstream = substream;
2046 return 0;
2047 }
2048
3bf75f9b
TI		 2049 err = snd_pcm_hw_constraints_init(substream);
2050 if (err < 0) {
2051 snd_printd("snd_pcm_hw_constraints_init failed\n");
2052 goto error;
2053 }
2054
2055 if ((err = substream->ops->open(substream)) < 0)
2056 goto error;
2057
2058 substream->hw_opened = 1;
2059
2060 err = snd_pcm_hw_constraints_complete(substream);
2061 if (err < 0) {
2062 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2063 goto error;
2064 }
2065
2066 *rsubstream = substream;
1da177e4 2067 return 0;
3bf75f9b
TI		 2068
2069 error:
2070 snd_pcm_release_substream(substream);
2071 return err;
1da177e4
LT		 2072}
2073
e88e8ae6
TI		 2074EXPORT_SYMBOL(snd_pcm_open_substream);
2075
1da177e4 2076static int snd_pcm_open_file(struct file *file,
877211f5 2077 struct snd_pcm *pcm,
ffd3d5c6 2078 int stream)
1da177e4 2079{
877211f5
TI		 2080 struct snd_pcm_file *pcm_file;
2081 struct snd_pcm_substream *substream;
3bf75f9b 2082 int err;
1da177e4 2083
3bf75f9b
TI		 2084 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2085 if (err < 0)
2086 return err;
2087
548a648b
TI		 2088 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2089 if (pcm_file == NULL) {
2090 snd_pcm_release_substream(substream);
2091 return -ENOMEM;
2092 }
2093 pcm_file->substream = substream;
2094 if (substream->ref_count == 1) {
0df63e44
TI		 2095 substream->file = pcm_file;
2096 substream->pcm_release = pcm_release_private;
1da177e4 2097 }
1da177e4 2098 file->private_data = pcm_file;
ffd3d5c6 2099
1da177e4
LT		 2100 return 0;
2101}
2102
f87135f5
CL		 2103static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2104{
2105 struct snd_pcm *pcm;
02f4865f
TI		 2106 int err = nonseekable_open(inode, file);
2107 if (err < 0)
2108 return err;
f87135f5
CL		 2109 pcm = snd_lookup_minor_data(iminor(inode),
2110 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2111 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2112}
2113
2114static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2115{
877211f5 2116 struct snd_pcm *pcm;
02f4865f
TI		 2117 int err = nonseekable_open(inode, file);
2118 if (err < 0)
2119 return err;
f87135f5
CL		 2120 pcm = snd_lookup_minor_data(iminor(inode),
2121 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2122 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2123}
2124
2125static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2126{
2127 int err;
1da177e4
LT		 2128 wait_queue_t wait;
2129
1da177e4
LT		 2130 if (pcm == NULL) {
2131 err = -ENODEV;
2132 goto __error1;
2133 }
2134 err = snd_card_file_add(pcm->card, file);
2135 if (err < 0)
2136 goto __error1;
2137 if (!try_module_get(pcm->card->module)) {
2138 err = -EFAULT;
2139 goto __error2;
2140 }
2141 init_waitqueue_entry(&wait, current);
2142 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2143 mutex_lock(&pcm->open_mutex);
1da177e4 2144 while (1) {
ffd3d5c6 2145 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2146 if (err >= 0)
2147 break;
2148 if (err == -EAGAIN) {
2149 if (file->f_flags & O_NONBLOCK) {
2150 err = -EBUSY;
2151 break;
2152 }
2153 } else
2154 break;
2155 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2156 mutex_unlock(&pcm->open_mutex);
1da177e4 2157 schedule();
1a60d4c5 2158 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2159 if (signal_pending(current)) {
2160 err = -ERESTARTSYS;
2161 break;
2162 }
2163 }
2164 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2165 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2166 if (err < 0)
2167 goto __error;
2168 return err;
2169
2170 __error:
2171 module_put(pcm->card->module);
2172 __error2:
2173 snd_card_file_remove(pcm->card, file);
2174 __error1:
2175 return err;
2176}
2177
2178static int snd_pcm_release(struct inode *inode, struct file *file)
2179{
877211f5
TI		 2180 struct snd_pcm *pcm;
2181 struct snd_pcm_substream *substream;
2182 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2183
2184 pcm_file = file->private_data;
2185 substream = pcm_file->substream;
7eaa943c
TI		 2186 if (snd_BUG_ON(!substream))
2187 return -ENXIO;
1da177e4 2188 pcm = substream->pcm;
1a60d4c5 2189 mutex_lock(&pcm->open_mutex);
3bf75f9b 2190 snd_pcm_release_substream(substream);
548a648b 2191 kfree(pcm_file);
1a60d4c5 2192 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2193 wake_up(&pcm->open_wait);
2194 module_put(pcm->card->module);
2195 snd_card_file_remove(pcm->card, file);
2196 return 0;
2197}
2198
877211f5
TI		 2199static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2200 snd_pcm_uframes_t frames)
1da177e4 2201{
877211f5 2202 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2203 snd_pcm_sframes_t appl_ptr;
2204 snd_pcm_sframes_t ret;
2205 snd_pcm_sframes_t hw_avail;
2206
2207 if (frames == 0)
2208 return 0;
2209
2210 snd_pcm_stream_lock_irq(substream);
2211 switch (runtime->status->state) {
2212 case SNDRV_PCM_STATE_PREPARED:
2213 break;
2214 case SNDRV_PCM_STATE_DRAINING:
2215 case SNDRV_PCM_STATE_RUNNING:
2216 if (snd_pcm_update_hw_ptr(substream) >= 0)
2217 break;
2218 /* Fall through */
2219 case SNDRV_PCM_STATE_XRUN:
2220 ret = -EPIPE;
2221 goto __end;
51840409
LR		 2222 case SNDRV_PCM_STATE_SUSPENDED:
2223 ret = -ESTRPIPE;
2224 goto __end;
1da177e4
LT		 2225 default:
2226 ret = -EBADFD;
2227 goto __end;
2228 }
2229
2230 hw_avail = snd_pcm_playback_hw_avail(runtime);
2231 if (hw_avail <= 0) {
2232 ret = 0;
2233 goto __end;
2234 }
2235 if (frames > (snd_pcm_uframes_t)hw_avail)
2236 frames = hw_avail;
1da177e4
LT		 2237 appl_ptr = runtime->control->appl_ptr - frames;
2238 if (appl_ptr < 0)
2239 appl_ptr += runtime->boundary;
2240 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2241 ret = frames;
2242 __end:
2243 snd_pcm_stream_unlock_irq(substream);
2244 return ret;
2245}
2246
877211f5
TI		 2247static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2248 snd_pcm_uframes_t frames)
1da177e4 2249{
877211f5 2250 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2251 snd_pcm_sframes_t appl_ptr;
2252 snd_pcm_sframes_t ret;
2253 snd_pcm_sframes_t hw_avail;
2254
2255 if (frames == 0)
2256 return 0;
2257
2258 snd_pcm_stream_lock_irq(substream);
2259 switch (runtime->status->state) {
2260 case SNDRV_PCM_STATE_PREPARED:
2261 case SNDRV_PCM_STATE_DRAINING:
2262 break;
2263 case SNDRV_PCM_STATE_RUNNING:
2264 if (snd_pcm_update_hw_ptr(substream) >= 0)
2265 break;
2266 /* Fall through */
2267 case SNDRV_PCM_STATE_XRUN:
2268 ret = -EPIPE;
2269 goto __end;
51840409
LR		 2270 case SNDRV_PCM_STATE_SUSPENDED:
2271 ret = -ESTRPIPE;
2272 goto __end;
1da177e4
LT		 2273 default:
2274 ret = -EBADFD;
2275 goto __end;
2276 }
2277
2278 hw_avail = snd_pcm_capture_hw_avail(runtime);
2279 if (hw_avail <= 0) {
2280 ret = 0;
2281 goto __end;
2282 }
2283 if (frames > (snd_pcm_uframes_t)hw_avail)
2284 frames = hw_avail;
1da177e4
LT		 2285 appl_ptr = runtime->control->appl_ptr - frames;
2286 if (appl_ptr < 0)
2287 appl_ptr += runtime->boundary;
2288 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2289 ret = frames;
2290 __end:
2291 snd_pcm_stream_unlock_irq(substream);
2292 return ret;
2293}
2294
877211f5
TI		 2295static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2296 snd_pcm_uframes_t frames)
1da177e4 2297{
877211f5 2298 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2299 snd_pcm_sframes_t appl_ptr;
2300 snd_pcm_sframes_t ret;
2301 snd_pcm_sframes_t avail;
2302
2303 if (frames == 0)
2304 return 0;
2305
2306 snd_pcm_stream_lock_irq(substream);
2307 switch (runtime->status->state) {
2308 case SNDRV_PCM_STATE_PREPARED:
2309 case SNDRV_PCM_STATE_PAUSED:
2310 break;
2311 case SNDRV_PCM_STATE_DRAINING:
2312 case SNDRV_PCM_STATE_RUNNING:
2313 if (snd_pcm_update_hw_ptr(substream) >= 0)
2314 break;
2315 /* Fall through */
2316 case SNDRV_PCM_STATE_XRUN:
2317 ret = -EPIPE;
2318 goto __end;
51840409
LR		 2319 case SNDRV_PCM_STATE_SUSPENDED:
2320 ret = -ESTRPIPE;
2321 goto __end;
1da177e4
LT		 2322 default:
2323 ret = -EBADFD;
2324 goto __end;
2325 }
2326
2327 avail = snd_pcm_playback_avail(runtime);
2328 if (avail <= 0) {
2329 ret = 0;
2330 goto __end;
2331 }
2332 if (frames > (snd_pcm_uframes_t)avail)
2333 frames = avail;
1da177e4
LT		 2334 appl_ptr = runtime->control->appl_ptr + frames;
2335 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2336 appl_ptr -= runtime->boundary;
2337 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2338 ret = frames;
2339 __end:
2340 snd_pcm_stream_unlock_irq(substream);
2341 return ret;
2342}
2343
877211f5
TI		 2344static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2345 snd_pcm_uframes_t frames)
1da177e4 2346{
877211f5 2347 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2348 snd_pcm_sframes_t appl_ptr;
2349 snd_pcm_sframes_t ret;
2350 snd_pcm_sframes_t avail;
2351
2352 if (frames == 0)
2353 return 0;
2354
2355 snd_pcm_stream_lock_irq(substream);
2356 switch (runtime->status->state) {
2357 case SNDRV_PCM_STATE_PREPARED:
2358 case SNDRV_PCM_STATE_DRAINING:
2359 case SNDRV_PCM_STATE_PAUSED:
2360 break;
2361 case SNDRV_PCM_STATE_RUNNING:
2362 if (snd_pcm_update_hw_ptr(substream) >= 0)
2363 break;
2364 /* Fall through */
2365 case SNDRV_PCM_STATE_XRUN:
2366 ret = -EPIPE;
2367 goto __end;
51840409
LR		 2368 case SNDRV_PCM_STATE_SUSPENDED:
2369 ret = -ESTRPIPE;
2370 goto __end;
1da177e4
LT		 2371 default:
2372 ret = -EBADFD;
2373 goto __end;
2374 }
2375
2376 avail = snd_pcm_capture_avail(runtime);
2377 if (avail <= 0) {
2378 ret = 0;
2379 goto __end;
2380 }
2381 if (frames > (snd_pcm_uframes_t)avail)
2382 frames = avail;
1da177e4
LT		 2383 appl_ptr = runtime->control->appl_ptr + frames;
2384 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2385 appl_ptr -= runtime->boundary;
2386 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2387 ret = frames;
2388 __end:
2389 snd_pcm_stream_unlock_irq(substream);
2390 return ret;
2391}
2392
877211f5 2393static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2394{
877211f5 2395 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2396 int err;
2397
2398 snd_pcm_stream_lock_irq(substream);
2399 switch (runtime->status->state) {
2400 case SNDRV_PCM_STATE_DRAINING:
2401 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2402 goto __badfd;
2403 case SNDRV_PCM_STATE_RUNNING:
2404 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2405 break;
2406 /* Fall through */
2407 case SNDRV_PCM_STATE_PREPARED:
2408 case SNDRV_PCM_STATE_SUSPENDED:
2409 err = 0;
2410 break;
2411 case SNDRV_PCM_STATE_XRUN:
2412 err = -EPIPE;
2413 break;
2414 default:
2415 __badfd:
2416 err = -EBADFD;
2417 break;
2418 }
2419 snd_pcm_stream_unlock_irq(substream);
2420 return err;
2421}
2422
877211f5
TI		 2423static int snd_pcm_delay(struct snd_pcm_substream *substream,
2424 snd_pcm_sframes_t __user *res)
1da177e4 2425{
877211f5 2426 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2427 int err;
2428 snd_pcm_sframes_t n = 0;
2429
2430 snd_pcm_stream_lock_irq(substream);
2431 switch (runtime->status->state) {
2432 case SNDRV_PCM_STATE_DRAINING:
2433 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2434 goto __badfd;
2435 case SNDRV_PCM_STATE_RUNNING:
2436 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2437 break;
2438 /* Fall through */
2439 case SNDRV_PCM_STATE_PREPARED:
2440 case SNDRV_PCM_STATE_SUSPENDED:
2441 err = 0;
2442 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2443 n = snd_pcm_playback_hw_avail(runtime);
2444 else
2445 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2446 n += runtime->delay;
1da177e4
LT		 2447 break;
2448 case SNDRV_PCM_STATE_XRUN:
2449 err = -EPIPE;
2450 break;
2451 default:
2452 __badfd:
2453 err = -EBADFD;
2454 break;
2455 }
2456 snd_pcm_stream_unlock_irq(substream);
2457 if (!err)
2458 if (put_user(n, res))
2459 err = -EFAULT;
2460 return err;
2461}
2462
877211f5
TI		 2463static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2464 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2465{
877211f5
TI		 2466 struct snd_pcm_runtime *runtime = substream->runtime;
2467 struct snd_pcm_sync_ptr sync_ptr;
2468 volatile struct snd_pcm_mmap_status *status;
2469 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2470 int err;
2471
2472 memset(&sync_ptr, 0, sizeof(sync_ptr));
2473 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2474 return -EFAULT;
877211f5 2475 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2476 return -EFAULT;
2477 status = runtime->status;
2478 control = runtime->control;
2479 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2480 err = snd_pcm_hwsync(substream);
2481 if (err < 0)
2482 return err;
2483 }
2484 snd_pcm_stream_lock_irq(substream);
2485 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2486 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2487 else
2488 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2489 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2490 control->avail_min = sync_ptr.c.control.avail_min;
2491 else
2492 sync_ptr.c.control.avail_min = control->avail_min;
2493 sync_ptr.s.status.state = status->state;
2494 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2495 sync_ptr.s.status.tstamp = status->tstamp;
2496 sync_ptr.s.status.suspended_state = status->suspended_state;
2497 snd_pcm_stream_unlock_irq(substream);
2498 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2499 return -EFAULT;
2500 return 0;
2501}
b751eef1
JK		 2502
2503static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2504{
2505 struct snd_pcm_runtime *runtime = substream->runtime;
2506 int arg;
2507
2508 if (get_user(arg, _arg))
2509 return -EFAULT;
2510 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2511 return -EINVAL;
2512 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2513 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2514 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2515 return 0;
2516}
1da177e4 2517
0df63e44
TI		 2518static int snd_pcm_common_ioctl1(struct file *file,
2519 struct snd_pcm_substream *substream,
1da177e4
LT		 2520 unsigned int cmd, void __user *arg)
2521{
1da177e4
LT		 2522 switch (cmd) {
2523 case SNDRV_PCM_IOCTL_PVERSION:
2524 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2525 case SNDRV_PCM_IOCTL_INFO:
2526 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2527 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2528 return 0;
b751eef1
JK		 2529 case SNDRV_PCM_IOCTL_TTSTAMP:
2530 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2531 case SNDRV_PCM_IOCTL_HW_REFINE:
2532 return snd_pcm_hw_refine_user(substream, arg);
2533 case SNDRV_PCM_IOCTL_HW_PARAMS:
2534 return snd_pcm_hw_params_user(substream, arg);
2535 case SNDRV_PCM_IOCTL_HW_FREE:
2536 return snd_pcm_hw_free(substream);
2537 case SNDRV_PCM_IOCTL_SW_PARAMS:
2538 return snd_pcm_sw_params_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_STATUS:
2540 return snd_pcm_status_user(substream, arg);
2541 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2542 return snd_pcm_channel_info_user(substream, arg);
2543 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2544 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2545 case SNDRV_PCM_IOCTL_RESET:
2546 return snd_pcm_reset(substream);
2547 case SNDRV_PCM_IOCTL_START:
2548 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2549 case SNDRV_PCM_IOCTL_LINK:
2550 return snd_pcm_link(substream, (int)(unsigned long) arg);
2551 case SNDRV_PCM_IOCTL_UNLINK:
2552 return snd_pcm_unlink(substream);
2553 case SNDRV_PCM_IOCTL_RESUME:
2554 return snd_pcm_resume(substream);
2555 case SNDRV_PCM_IOCTL_XRUN:
2556 return snd_pcm_xrun(substream);
2557 case SNDRV_PCM_IOCTL_HWSYNC:
2558 return snd_pcm_hwsync(substream);
2559 case SNDRV_PCM_IOCTL_DELAY:
2560 return snd_pcm_delay(substream, arg);
2561 case SNDRV_PCM_IOCTL_SYNC_PTR:
2562 return snd_pcm_sync_ptr(substream, arg);
59d48582 2563#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2564 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2565 return snd_pcm_hw_refine_old_user(substream, arg);
2566 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2567 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2568#endif
1da177e4 2569 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2570 return snd_pcm_drain(substream, file);
1da177e4
LT		 2571 case SNDRV_PCM_IOCTL_DROP:
2572 return snd_pcm_drop(substream);
e661d0dd
TI		 2573 case SNDRV_PCM_IOCTL_PAUSE:
2574 {
2575 int res;
2576 snd_pcm_stream_lock_irq(substream);
2577 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2578 snd_pcm_stream_unlock_irq(substream);
2579 return res;
2580 }
1da177e4
LT		 2581 }
2582 snd_printd("unknown ioctl = 0x%x\n", cmd);
2583 return -ENOTTY;
2584}
2585
0df63e44
TI		 2586static int snd_pcm_playback_ioctl1(struct file *file,
2587 struct snd_pcm_substream *substream,
1da177e4
LT		 2588 unsigned int cmd, void __user *arg)
2589{
7eaa943c
TI		 2590 if (snd_BUG_ON(!substream))
2591 return -ENXIO;
2592 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2593 return -EINVAL;
1da177e4
LT		 2594 switch (cmd) {
2595 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2596 {
877211f5
TI		 2597 struct snd_xferi xferi;
2598 struct snd_xferi __user *_xferi = arg;
2599 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2600 snd_pcm_sframes_t result;
2601 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2602 return -EBADFD;
2603 if (put_user(0, &_xferi->result))
2604 return -EFAULT;
2605 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2606 return -EFAULT;
2607 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2608 __put_user(result, &_xferi->result);
2609 return result < 0 ? result : 0;
2610 }
2611 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2612 {
877211f5
TI		 2613 struct snd_xfern xfern;
2614 struct snd_xfern __user *_xfern = arg;
2615 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2616 void __user **bufs;
2617 snd_pcm_sframes_t result;
2618 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2619 return -EBADFD;
2620 if (runtime->channels > 128)
2621 return -EINVAL;
2622 if (put_user(0, &_xfern->result))
2623 return -EFAULT;
2624 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2625 return -EFAULT;
ef44a1ec
LZ		 2626
2627 bufs = memdup_user(xfern.bufs,
2628 sizeof(void *) * runtime->channels);
2629 if (IS_ERR(bufs))
2630 return PTR_ERR(bufs);
1da177e4
LT		 2631 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2632 kfree(bufs);
2633 __put_user(result, &_xfern->result);
2634 return result < 0 ? result : 0;
2635 }
2636 case SNDRV_PCM_IOCTL_REWIND:
2637 {
2638 snd_pcm_uframes_t frames;
2639 snd_pcm_uframes_t __user *_frames = arg;
2640 snd_pcm_sframes_t result;
2641 if (get_user(frames, _frames))
2642 return -EFAULT;
2643 if (put_user(0, _frames))
2644 return -EFAULT;
2645 result = snd_pcm_playback_rewind(substream, frames);
2646 __put_user(result, _frames);
2647 return result < 0 ? result : 0;
2648 }
2649 case SNDRV_PCM_IOCTL_FORWARD:
2650 {
2651 snd_pcm_uframes_t frames;
2652 snd_pcm_uframes_t __user *_frames = arg;
2653 snd_pcm_sframes_t result;
2654 if (get_user(frames, _frames))
2655 return -EFAULT;
2656 if (put_user(0, _frames))
2657 return -EFAULT;
2658 result = snd_pcm_playback_forward(substream, frames);
2659 __put_user(result, _frames);
2660 return result < 0 ? result : 0;
2661 }
1da177e4 2662 }
0df63e44 2663 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2664}
2665
0df63e44
TI		 2666static int snd_pcm_capture_ioctl1(struct file *file,
2667 struct snd_pcm_substream *substream,
1da177e4
LT		 2668 unsigned int cmd, void __user *arg)
2669{
7eaa943c
TI		 2670 if (snd_BUG_ON(!substream))
2671 return -ENXIO;
2672 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2673 return -EINVAL;
1da177e4
LT		 2674 switch (cmd) {
2675 case SNDRV_PCM_IOCTL_READI_FRAMES:
2676 {
877211f5
TI		 2677 struct snd_xferi xferi;
2678 struct snd_xferi __user *_xferi = arg;
2679 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2680 snd_pcm_sframes_t result;
2681 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2682 return -EBADFD;
2683 if (put_user(0, &_xferi->result))
2684 return -EFAULT;
2685 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2686 return -EFAULT;
2687 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2688 __put_user(result, &_xferi->result);
2689 return result < 0 ? result : 0;
2690 }
2691 case SNDRV_PCM_IOCTL_READN_FRAMES:
2692 {
877211f5
TI		 2693 struct snd_xfern xfern;
2694 struct snd_xfern __user *_xfern = arg;
2695 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2696 void *bufs;
2697 snd_pcm_sframes_t result;
2698 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2699 return -EBADFD;
2700 if (runtime->channels > 128)
2701 return -EINVAL;
2702 if (put_user(0, &_xfern->result))
2703 return -EFAULT;
2704 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2705 return -EFAULT;
ef44a1ec
LZ		 2706
2707 bufs = memdup_user(xfern.bufs,
2708 sizeof(void *) * runtime->channels);
2709 if (IS_ERR(bufs))
2710 return PTR_ERR(bufs);
1da177e4
LT		 2711 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2712 kfree(bufs);
2713 __put_user(result, &_xfern->result);
2714 return result < 0 ? result : 0;
2715 }
2716 case SNDRV_PCM_IOCTL_REWIND:
2717 {
2718 snd_pcm_uframes_t frames;
2719 snd_pcm_uframes_t __user *_frames = arg;
2720 snd_pcm_sframes_t result;
2721 if (get_user(frames, _frames))
2722 return -EFAULT;
2723 if (put_user(0, _frames))
2724 return -EFAULT;
2725 result = snd_pcm_capture_rewind(substream, frames);
2726 __put_user(result, _frames);
2727 return result < 0 ? result : 0;
2728 }
2729 case SNDRV_PCM_IOCTL_FORWARD:
2730 {
2731 snd_pcm_uframes_t frames;
2732 snd_pcm_uframes_t __user *_frames = arg;
2733 snd_pcm_sframes_t result;
2734 if (get_user(frames, _frames))
2735 return -EFAULT;
2736 if (put_user(0, _frames))
2737 return -EFAULT;
2738 result = snd_pcm_capture_forward(substream, frames);
2739 __put_user(result, _frames);
2740 return result < 0 ? result : 0;
2741 }
2742 }
0df63e44 2743 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2744}
2745
877211f5
TI		 2746static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2747 unsigned long arg)
1da177e4 2748{
877211f5 2749 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2750
2751 pcm_file = file->private_data;
2752
2753 if (((cmd >> 8) & 0xff) != 'A')
2754 return -ENOTTY;
2755
0df63e44
TI		 2756 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2757 (void __user *)arg);
1da177e4
LT		 2758}
2759
877211f5
TI		 2760static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2761 unsigned long arg)
1da177e4 2762{
877211f5 2763 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2764
2765 pcm_file = file->private_data;
2766
2767 if (((cmd >> 8) & 0xff) != 'A')
2768 return -ENOTTY;
2769
0df63e44
TI		 2770 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2771 (void __user *)arg);
1da177e4
LT		 2772}
2773
bf1bbb5a
TI		 2774int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2775 unsigned int cmd, void *arg)
1da177e4
LT		 2776{
2777 mm_segment_t fs;
2778 int result;
2779
2780 fs = snd_enter_user();
1da177e4
LT		 2781 switch (substream->stream) {
2782 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2783 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2784 (void __user *)arg);
bf1bbb5a 2785 break;
1da177e4 2786 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2787 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2788 (void __user *)arg);
bf1bbb5a 2789 break;
1da177e4 2790 default:
bf1bbb5a
TI		 2791 result = -EINVAL;
2792 break;
1da177e4 2793 }
bf1bbb5a
TI		 2794 snd_leave_user(fs);
2795 return result;
1da177e4
LT		 2796}
2797
e88e8ae6
TI		 2798EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2799
877211f5
TI		 2800static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2801 loff_t * offset)
1da177e4 2802{
877211f5
TI		 2803 struct snd_pcm_file *pcm_file;
2804 struct snd_pcm_substream *substream;
2805 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2806 snd_pcm_sframes_t result;
2807
2808 pcm_file = file->private_data;
2809 substream = pcm_file->substream;
7eaa943c
TI		 2810 if (PCM_RUNTIME_CHECK(substream))
2811 return -ENXIO;
1da177e4
LT		 2812 runtime = substream->runtime;
2813 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2814 return -EBADFD;
2815 if (!frame_aligned(runtime, count))
2816 return -EINVAL;
2817 count = bytes_to_frames(runtime, count);
2818 result = snd_pcm_lib_read(substream, buf, count);
2819 if (result > 0)
2820 result = frames_to_bytes(runtime, result);
2821 return result;
2822}
2823
877211f5
TI		 2824static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2825 size_t count, loff_t * offset)
1da177e4 2826{
877211f5
TI		 2827 struct snd_pcm_file *pcm_file;
2828 struct snd_pcm_substream *substream;
2829 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2830 snd_pcm_sframes_t result;
2831
2832 pcm_file = file->private_data;
2833 substream = pcm_file->substream;
7eaa943c
TI		 2834 if (PCM_RUNTIME_CHECK(substream))
2835 return -ENXIO;
1da177e4 2836 runtime = substream->runtime;
7eaa943c
TI		 2837 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2838 return -EBADFD;
2839 if (!frame_aligned(runtime, count))
2840 return -EINVAL;
1da177e4
LT		 2841 count = bytes_to_frames(runtime, count);
2842 result = snd_pcm_lib_write(substream, buf, count);
2843 if (result > 0)
2844 result = frames_to_bytes(runtime, result);
1da177e4
LT		 2845 return result;
2846}
2847
ee0b3e67
BP		 2848static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2849 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2850
2851{
877211f5
TI		 2852 struct snd_pcm_file *pcm_file;
2853 struct snd_pcm_substream *substream;
2854 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2855 snd_pcm_sframes_t result;
2856 unsigned long i;
2857 void __user **bufs;
2858 snd_pcm_uframes_t frames;
2859
ee0b3e67 2860 pcm_file = iocb->ki_filp->private_data;
1da177e4 2861 substream = pcm_file->substream;
7eaa943c
TI		 2862 if (PCM_RUNTIME_CHECK(substream))
2863 return -ENXIO;
1da177e4
LT		 2864 runtime = substream->runtime;
2865 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2866 return -EBADFD;
ee0b3e67 2867 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2868 return -EINVAL;
ee0b3e67 2869 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2870 return -EINVAL;
ee0b3e67
BP		 2871 frames = bytes_to_samples(runtime, iov->iov_len);
2872 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2873 if (bufs == NULL)
2874 return -ENOMEM;
ee0b3e67
BP		 2875 for (i = 0; i < nr_segs; ++i)
2876 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2877 result = snd_pcm_lib_readv(substream, bufs, frames);
2878 if (result > 0)
2879 result = frames_to_bytes(runtime, result);
2880 kfree(bufs);
2881 return result;
2882}
2883
ee0b3e67
BP		 2884static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2885 unsigned long nr_segs, loff_t pos)
1da177e4 2886{
877211f5
TI		 2887 struct snd_pcm_file *pcm_file;
2888 struct snd_pcm_substream *substream;
2889 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2890 snd_pcm_sframes_t result;
2891 unsigned long i;
2892 void __user **bufs;
2893 snd_pcm_uframes_t frames;
2894
ee0b3e67 2895 pcm_file = iocb->ki_filp->private_data;
1da177e4 2896 substream = pcm_file->substream;
7eaa943c
TI		 2897 if (PCM_RUNTIME_CHECK(substream))
2898 return -ENXIO;
1da177e4 2899 runtime = substream->runtime;
7eaa943c
TI		 2900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2901 return -EBADFD;
ee0b3e67 2902 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 2903 !frame_aligned(runtime, iov->iov_len))
2904 return -EINVAL;
ee0b3e67
BP		 2905 frames = bytes_to_samples(runtime, iov->iov_len);
2906 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2907 if (bufs == NULL)
2908 return -ENOMEM;
ee0b3e67
BP		 2909 for (i = 0; i < nr_segs; ++i)
2910 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2911 result = snd_pcm_lib_writev(substream, bufs, frames);
2912 if (result > 0)
2913 result = frames_to_bytes(runtime, result);
2914 kfree(bufs);
1da177e4
LT		 2915 return result;
2916}
2917
2918static unsigned int snd_pcm_playback_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_playback_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 = POLLOUT | POLLWRNORM;
2943 break;
2944 }
2945 /* Fall through */
2946 case SNDRV_PCM_STATE_DRAINING:
2947 mask = 0;
2948 break;
2949 default:
2950 mask = POLLOUT | POLLWRNORM | POLLERR;
2951 break;
2952 }
2953 snd_pcm_stream_unlock_irq(substream);
2954 return mask;
2955}
2956
2957static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2958{
877211f5
TI		 2959 struct snd_pcm_file *pcm_file;
2960 struct snd_pcm_substream *substream;
2961 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2962 unsigned int mask;
2963 snd_pcm_uframes_t avail;
2964
2965 pcm_file = file->private_data;
2966
2967 substream = pcm_file->substream;
7eaa943c
TI		 2968 if (PCM_RUNTIME_CHECK(substream))
2969 return -ENXIO;
1da177e4
LT		 2970 runtime = substream->runtime;
2971
2972 poll_wait(file, &runtime->sleep, wait);
2973
2974 snd_pcm_stream_lock_irq(substream);
2975 avail = snd_pcm_capture_avail(runtime);
2976 switch (runtime->status->state) {
2977 case SNDRV_PCM_STATE_RUNNING:
2978 case SNDRV_PCM_STATE_PREPARED:
2979 case SNDRV_PCM_STATE_PAUSED:
2980 if (avail >= runtime->control->avail_min) {
2981 mask = POLLIN | POLLRDNORM;
2982 break;
2983 }
2984 mask = 0;
2985 break;
2986 case SNDRV_PCM_STATE_DRAINING:
2987 if (avail > 0) {
2988 mask = POLLIN | POLLRDNORM;
2989 break;
2990 }
2991 /* Fall through */
2992 default:
2993 mask = POLLIN | POLLRDNORM | POLLERR;
2994 break;
2995 }
2996 snd_pcm_stream_unlock_irq(substream);
2997 return mask;
2998}
2999
3000/*
3001 * mmap support
3002 */
3003
3004/*
3005 * Only on coherent architectures, we can mmap the status and the control records
3006 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3007 */
3008#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3009/*
3010 * mmap status record
3011 */
3ad5afcd
NP		 3012static int snd_pcm_mmap_status_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->status);
3022 get_page(vmf->page);
3023 return 0;
1da177e4
LT		 3024}
3025
f0f37e2f 3026static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3027{
3ad5afcd 3028 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3029};
3030
877211f5 3031static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3032 struct vm_area_struct *area)
3033{
1da177e4
LT		 3034 long size;
3035 if (!(area->vm_flags & VM_READ))
3036 return -EINVAL;
1da177e4 3037 size = area->vm_end - area->vm_start;
877211f5 3038 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3039 return -EINVAL;
3040 area->vm_ops = &snd_pcm_vm_ops_status;
3041 area->vm_private_data = substream;
3042 area->vm_flags |= VM_RESERVED;
3043 return 0;
3044}
3045
3046/*
3047 * mmap control record
3048 */
3ad5afcd
NP		 3049static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3050 struct vm_fault *vmf)
1da177e4 3051{
877211f5
TI		 3052 struct snd_pcm_substream *substream = area->vm_private_data;
3053 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3054
3055 if (substream == NULL)
3ad5afcd 3056 return VM_FAULT_SIGBUS;
1da177e4 3057 runtime = substream->runtime;
3ad5afcd
NP		 3058 vmf->page = virt_to_page(runtime->control);
3059 get_page(vmf->page);
3060 return 0;
1da177e4
LT		 3061}
3062
f0f37e2f 3063static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3064{
3ad5afcd 3065 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3066};
3067
877211f5 3068static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3069 struct vm_area_struct *area)
3070{
1da177e4
LT		 3071 long size;
3072 if (!(area->vm_flags & VM_READ))
3073 return -EINVAL;
1da177e4 3074 size = area->vm_end - area->vm_start;
877211f5 3075 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3076 return -EINVAL;
3077 area->vm_ops = &snd_pcm_vm_ops_control;
3078 area->vm_private_data = substream;
3079 area->vm_flags |= VM_RESERVED;
3080 return 0;
3081}
3082#else /* ! coherent mmap */
3083/*
3084 * don't support mmap for status and control records.
3085 */
877211f5 3086static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3087 struct vm_area_struct *area)
3088{
3089 return -ENXIO;
3090}
877211f5 3091static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3092 struct vm_area_struct *area)
3093{
3094 return -ENXIO;
3095}
3096#endif /* coherent mmap */
3097
9eb4a067
TI		 3098static inline struct page *
3099snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3100{
3101 void *vaddr = substream->runtime->dma_area + ofs;
66b6cfac
TI		 3102#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3103 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3104 return virt_to_page(CAC_ADDR(vaddr));
6985c887
TI		 3105#endif
3106#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3107 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3108 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3109 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3110 /* assume dma_handle set via pfn_to_phys() in
3111 * mm/dma-noncoherent.c
3112 */
3113 return pfn_to_page(addr >> PAGE_SHIFT);
3114 }
66b6cfac 3115#endif
9eb4a067
TI		 3116 return virt_to_page(vaddr);
3117}
3118
1da177e4 3119/*
3ad5afcd 3120 * fault callback for mmapping a RAM page
1da177e4 3121 */
3ad5afcd
NP		 3122static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3123 struct vm_fault *vmf)
1da177e4 3124{
877211f5
TI		 3125 struct snd_pcm_substream *substream = area->vm_private_data;
3126 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3127 unsigned long offset;
3128 struct page * page;
1da177e4
LT		 3129 size_t dma_bytes;
3130
3131 if (substream == NULL)
3ad5afcd 3132 return VM_FAULT_SIGBUS;
1da177e4 3133 runtime = substream->runtime;
3ad5afcd 3134 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3135 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3136 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3137 return VM_FAULT_SIGBUS;
9eb4a067 3138 if (substream->ops->page)
1da177e4 3139 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3140 else
3141 page = snd_pcm_default_page_ops(substream, offset);
3142 if (!page)
3143 return VM_FAULT_SIGBUS;
b5810039 3144 get_page(page);
3ad5afcd
NP		 3145 vmf->page = page;
3146 return 0;
1da177e4
LT		 3147}
3148
657b1989
TI		 3149static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3150 .open = snd_pcm_mmap_data_open,
3151 .close = snd_pcm_mmap_data_close,
3152};
3153
3154static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3155 .open = snd_pcm_mmap_data_open,
3156 .close = snd_pcm_mmap_data_close,
3ad5afcd 3157 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3158};
3159
657b1989
TI		 3160#ifndef ARCH_HAS_DMA_MMAP_COHERENT
3161/* This should be defined / handled globally! */
3162#ifdef CONFIG_ARM
3163#define ARCH_HAS_DMA_MMAP_COHERENT
3164#endif
3165#endif
3166
1da177e4
LT		 3167/*
3168 * mmap the DMA buffer on RAM
3169 */
18a2b962
TI		 3170int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3171 struct vm_area_struct *area)
1da177e4 3172{
1da177e4 3173 area->vm_flags |= VM_RESERVED;
657b1989
TI		 3174#ifdef ARCH_HAS_DMA_MMAP_COHERENT
3175 if (!substream->ops->page &&
3176 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3177 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3178 area,
3179 substream->runtime->dma_area,
3180 substream->runtime->dma_addr,
3181 area->vm_end - area->vm_start);
9fe17b5d
TI		 3182#elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3183 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3184 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3185 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
657b1989
TI		 3186#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3187 /* mmap with fault handler */
3188 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3189 return 0;
3190}
18a2b962 3191EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3192
3193/*
3194 * mmap the DMA buffer on I/O memory area
3195 */
3196#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3197int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3198 struct vm_area_struct *area)
1da177e4
LT		 3199{
3200 long size;
3201 unsigned long offset;
3202
1da177e4 3203 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
1da177e4
LT		 3204 area->vm_flags |= VM_IO;
3205 size = area->vm_end - area->vm_start;
3206 offset = area->vm_pgoff << PAGE_SHIFT;
3207 if (io_remap_pfn_range(area, area->vm_start,
3208 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3209 size, area->vm_page_prot))
3210 return -EAGAIN;
1da177e4
LT		 3211 return 0;
3212}
e88e8ae6
TI		 3213
3214EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3215#endif /* SNDRV_PCM_INFO_MMAP */
3216
3217/*
3218 * mmap DMA buffer
3219 */
877211f5 3220int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3221 struct vm_area_struct *area)
3222{
877211f5 3223 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3224 long size;
3225 unsigned long offset;
3226 size_t dma_bytes;
657b1989 3227 int err;
1da177e4
LT		 3228
3229 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3230 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3231 return -EINVAL;
3232 } else {
3233 if (!(area->vm_flags & VM_READ))
3234 return -EINVAL;
3235 }
3236 runtime = substream->runtime;
1da177e4
LT		 3237 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3238 return -EBADFD;
3239 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3240 return -ENXIO;
3241 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3242 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3243 return -EINVAL;
3244 size = area->vm_end - area->vm_start;
3245 offset = area->vm_pgoff << PAGE_SHIFT;
3246 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3247 if ((size_t)size > dma_bytes)
3248 return -EINVAL;
3249 if (offset > dma_bytes - size)
3250 return -EINVAL;
3251
657b1989
TI		 3252 area->vm_ops = &snd_pcm_vm_ops_data;
3253 area->vm_private_data = substream;
1da177e4 3254 if (substream->ops->mmap)
657b1989 3255 err = substream->ops->mmap(substream, area);
1da177e4 3256 else
18a2b962 3257 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3258 if (!err)
3259 atomic_inc(&substream->mmap_count);
3260 return err;
1da177e4
LT		 3261}
3262
e88e8ae6
TI		 3263EXPORT_SYMBOL(snd_pcm_mmap_data);
3264
1da177e4
LT		 3265static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3266{
877211f5
TI		 3267 struct snd_pcm_file * pcm_file;
3268 struct snd_pcm_substream *substream;
1da177e4
LT		 3269 unsigned long offset;
3270
3271 pcm_file = file->private_data;
3272 substream = pcm_file->substream;
7eaa943c
TI		 3273 if (PCM_RUNTIME_CHECK(substream))
3274 return -ENXIO;
1da177e4
LT		 3275
3276 offset = area->vm_pgoff << PAGE_SHIFT;
3277 switch (offset) {
3278 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3279 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3280 return -ENXIO;
3281 return snd_pcm_mmap_status(substream, file, area);
3282 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3283 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3284 return -ENXIO;
3285 return snd_pcm_mmap_control(substream, file, area);
3286 default:
3287 return snd_pcm_mmap_data(substream, file, area);
3288 }
3289 return 0;
3290}
3291
3292static int snd_pcm_fasync(int fd, struct file * file, int on)
3293{
877211f5
TI		 3294 struct snd_pcm_file * pcm_file;
3295 struct snd_pcm_substream *substream;
3296 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3297
3298 pcm_file = file->private_data;
3299 substream = pcm_file->substream;
7eaa943c 3300 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3301 return -ENXIO;
1da177e4 3302 runtime = substream->runtime;
d05468b7 3303 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3304}
3305
3306/*
3307 * ioctl32 compat
3308 */
3309#ifdef CONFIG_COMPAT
3310#include "pcm_compat.c"
3311#else
3312#define snd_pcm_ioctl_compat NULL
3313#endif
3314
3315/*
3316 * To be removed helpers to keep binary compatibility
3317 */
3318
59d48582 3319#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3320#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3321#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3322
877211f5
TI		 3323static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3324 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3325{
3326 unsigned int i;
3327
3328 memset(params, 0, sizeof(*params));
3329 params->flags = oparams->flags;
3330 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3331 params->masks[i].bits[0] = oparams->masks[i];
3332 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3333 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3334 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3335 params->info = oparams->info;
3336 params->msbits = oparams->msbits;
3337 params->rate_num = oparams->rate_num;
3338 params->rate_den = oparams->rate_den;
3339 params->fifo_size = oparams->fifo_size;
3340}
3341
877211f5
TI		 3342static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3343 struct snd_pcm_hw_params *params)
1da177e4
LT		 3344{
3345 unsigned int i;
3346
3347 memset(oparams, 0, sizeof(*oparams));
3348 oparams->flags = params->flags;
3349 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3350 oparams->masks[i] = params->masks[i].bits[0];
3351 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3352 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3353 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3354 oparams->info = params->info;
3355 oparams->msbits = params->msbits;
3356 oparams->rate_num = params->rate_num;
3357 oparams->rate_den = params->rate_den;
3358 oparams->fifo_size = params->fifo_size;
3359}
3360
877211f5
TI		 3361static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3362 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3363{
877211f5
TI		 3364 struct snd_pcm_hw_params *params;
3365 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3366 int err;
3367
3368 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3369 if (!params)
3370 return -ENOMEM;
1da177e4 3371
ef44a1ec
LZ		 3372 oparams = memdup_user(_oparams, sizeof(*oparams));
3373 if (IS_ERR(oparams)) {
3374 err = PTR_ERR(oparams);
1da177e4
LT		 3375 goto out;
3376 }
3377 snd_pcm_hw_convert_from_old_params(params, oparams);
3378 err = snd_pcm_hw_refine(substream, params);
3379 snd_pcm_hw_convert_to_old_params(oparams, params);
3380 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3381 if (!err)
3382 err = -EFAULT;
3383 }
ef44a1ec
LZ		 3384
3385 kfree(oparams);
1da177e4
LT		 3386out:
3387 kfree(params);
1da177e4
LT		 3388 return err;
3389}
3390
877211f5
TI		 3391static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3392 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3393{
877211f5
TI		 3394 struct snd_pcm_hw_params *params;
3395 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3396 int err;
3397
3398 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3399 if (!params)
3400 return -ENOMEM;
3401
3402 oparams = memdup_user(_oparams, sizeof(*oparams));
3403 if (IS_ERR(oparams)) {
3404 err = PTR_ERR(oparams);
1da177e4
LT		 3405 goto out;
3406 }
3407 snd_pcm_hw_convert_from_old_params(params, oparams);
3408 err = snd_pcm_hw_params(substream, params);
3409 snd_pcm_hw_convert_to_old_params(oparams, params);
3410 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3411 if (!err)
3412 err = -EFAULT;
3413 }
ef44a1ec
LZ		 3414
3415 kfree(oparams);
1da177e4
LT		 3416out:
3417 kfree(params);
1da177e4
LT		 3418 return err;
3419}
59d48582 3420#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3421
7003609b 3422#ifndef CONFIG_MMU
55c63bd2
DG		 3423static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3424 unsigned long addr,
3425 unsigned long len,
3426 unsigned long pgoff,
3427 unsigned long flags)
3428{
3429 struct snd_pcm_file *pcm_file = file->private_data;
3430 struct snd_pcm_substream *substream = pcm_file->substream;
3431 struct snd_pcm_runtime *runtime = substream->runtime;
3432 unsigned long offset = pgoff << PAGE_SHIFT;
3433
3434 switch (offset) {
3435 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3436 return (unsigned long)runtime->status;
3437 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3438 return (unsigned long)runtime->control;
3439 default:
3440 return (unsigned long)runtime->dma_area + offset;
3441 }
7003609b
CC		 3442}
3443#else
55c63bd2 3444# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3445#endif
3446
1da177e4
LT		 3447/*
3448 * Register section
3449 */
3450
9c2e08c5 3451const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3452 {
2af677fc
CL		 3453 .owner = THIS_MODULE,
3454 .write = snd_pcm_write,
ee0b3e67 3455 .aio_write = snd_pcm_aio_write,
f87135f5 3456 .open = snd_pcm_playback_open,
2af677fc 3457 .release = snd_pcm_release,
02f4865f 3458 .llseek = no_llseek,
2af677fc
CL		 3459 .poll = snd_pcm_playback_poll,
3460 .unlocked_ioctl = snd_pcm_playback_ioctl,
3461 .compat_ioctl = snd_pcm_ioctl_compat,
3462 .mmap = snd_pcm_mmap,
3463 .fasync = snd_pcm_fasync,
55c63bd2 3464 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3465 },
3466 {
2af677fc
CL		 3467 .owner = THIS_MODULE,
3468 .read = snd_pcm_read,
ee0b3e67 3469 .aio_read = snd_pcm_aio_read,
f87135f5 3470 .open = snd_pcm_capture_open,
2af677fc 3471 .release = snd_pcm_release,
02f4865f 3472 .llseek = no_llseek,
2af677fc
CL		 3473 .poll = snd_pcm_capture_poll,
3474 .unlocked_ioctl = snd_pcm_capture_ioctl,
3475 .compat_ioctl = snd_pcm_ioctl_compat,
3476 .mmap = snd_pcm_mmap,
3477 .fasync = snd_pcm_fasync,
55c63bd2 3478 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3479 }
3480};
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