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ALSA: Add a reference counter to card instance
[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
9b0573c0
TI		 372static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
373{
374 snd_pcm_stream_lock_irq(substream);
375 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
376 substream->runtime->status->state = state;
377 snd_pcm_stream_unlock_irq(substream);
378}
379
877211f5
TI		 380static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
381 struct snd_pcm_hw_params *params)
1da177e4 382{
877211f5 383 struct snd_pcm_runtime *runtime;
9442e691 384 int err, usecs;
1da177e4
LT		 385 unsigned int bits;
386 snd_pcm_uframes_t frames;
387
7eaa943c
TI		 388 if (PCM_RUNTIME_CHECK(substream))
389 return -ENXIO;
1da177e4 390 runtime = substream->runtime;
1da177e4
LT		 391 snd_pcm_stream_lock_irq(substream);
392 switch (runtime->status->state) {
393 case SNDRV_PCM_STATE_OPEN:
394 case SNDRV_PCM_STATE_SETUP:
395 case SNDRV_PCM_STATE_PREPARED:
396 break;
397 default:
398 snd_pcm_stream_unlock_irq(substream);
399 return -EBADFD;
400 }
401 snd_pcm_stream_unlock_irq(substream);
402#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
403 if (!substream->oss.oss)
404#endif
9c323fcb 405 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 406 return -EBADFD;
407
408 params->rmask = ~0U;
409 err = snd_pcm_hw_refine(substream, params);
410 if (err < 0)
411 goto _error;
412
413 err = snd_pcm_hw_params_choose(substream, params);
414 if (err < 0)
415 goto _error;
416
417 if (substream->ops->hw_params != NULL) {
418 err = substream->ops->hw_params(substream, params);
419 if (err < 0)
420 goto _error;
421 }
422
423 runtime->access = params_access(params);
424 runtime->format = params_format(params);
425 runtime->subformat = params_subformat(params);
426 runtime->channels = params_channels(params);
427 runtime->rate = params_rate(params);
428 runtime->period_size = params_period_size(params);
429 runtime->periods = params_periods(params);
430 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 431 runtime->info = params->info;
432 runtime->rate_num = params->rate_num;
433 runtime->rate_den = params->rate_den;
ab69a490
CL		 434 runtime->no_period_wakeup =
435 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
436 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 437
438 bits = snd_pcm_format_physical_width(runtime->format);
439 runtime->sample_bits = bits;
440 bits *= runtime->channels;
441 runtime->frame_bits = bits;
442 frames = 1;
443 while (bits % 8 != 0) {
444 bits *= 2;
445 frames *= 2;
446 }
447 runtime->byte_align = bits / 8;
448 runtime->min_align = frames;
449
450 /* Default sw params */
451 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
452 runtime->period_step = 1;
1da177e4 453 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 454 runtime->start_threshold = 1;
455 runtime->stop_threshold = runtime->buffer_size;
456 runtime->silence_threshold = 0;
457 runtime->silence_size = 0;
ead4046b
CL		 458 runtime->boundary = runtime->buffer_size;
459 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
460 runtime->boundary *= 2;
1da177e4
LT		 461
462 snd_pcm_timer_resolution_change(substream);
9b0573c0 463 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 464
82f68251
JB		 465 if (pm_qos_request_active(&substream->latency_pm_qos_req))
466 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 467 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 468 pm_qos_add_request(&substream->latency_pm_qos_req,
469 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 470 return 0;
471 _error:
25985edc 472 /* hardware might be unusable from this time,
1da177e4
LT		 473 so we force application to retry to set
474 the correct hardware parameter settings */
9b0573c0 475 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 476 if (substream->ops->hw_free != NULL)
477 substream->ops->hw_free(substream);
478 return err;
479}
480
877211f5
TI		 481static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
482 struct snd_pcm_hw_params __user * _params)
1da177e4 483{
877211f5 484 struct snd_pcm_hw_params *params;
1da177e4
LT		 485 int err;
486
ef44a1ec
LZ		 487 params = memdup_user(_params, sizeof(*params));
488 if (IS_ERR(params))
489 return PTR_ERR(params);
490
1da177e4
LT		 491 err = snd_pcm_hw_params(substream, params);
492 if (copy_to_user(_params, params, sizeof(*params))) {
493 if (!err)
494 err = -EFAULT;
495 }
ef44a1ec 496
1da177e4
LT		 497 kfree(params);
498 return err;
499}
500
877211f5 501static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 502{
877211f5 503 struct snd_pcm_runtime *runtime;
1da177e4
LT		 504 int result = 0;
505
7eaa943c
TI		 506 if (PCM_RUNTIME_CHECK(substream))
507 return -ENXIO;
1da177e4 508 runtime = substream->runtime;
1da177e4
LT		 509 snd_pcm_stream_lock_irq(substream);
510 switch (runtime->status->state) {
511 case SNDRV_PCM_STATE_SETUP:
512 case SNDRV_PCM_STATE_PREPARED:
513 break;
514 default:
515 snd_pcm_stream_unlock_irq(substream);
516 return -EBADFD;
517 }
518 snd_pcm_stream_unlock_irq(substream);
9c323fcb 519 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 520 return -EBADFD;
521 if (substream->ops->hw_free)
522 result = substream->ops->hw_free(substream);
9b0573c0 523 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 524 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 525 return result;
526}
527
877211f5
TI		 528static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
529 struct snd_pcm_sw_params *params)
1da177e4 530{
877211f5 531 struct snd_pcm_runtime *runtime;
1250932e 532 int err;
1da177e4 533
7eaa943c
TI		 534 if (PCM_RUNTIME_CHECK(substream))
535 return -ENXIO;
1da177e4 536 runtime = substream->runtime;
1da177e4
LT		 537 snd_pcm_stream_lock_irq(substream);
538 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
539 snd_pcm_stream_unlock_irq(substream);
540 return -EBADFD;
541 }
542 snd_pcm_stream_unlock_irq(substream);
543
544 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
545 return -EINVAL;
546 if (params->avail_min == 0)
547 return -EINVAL;
1da177e4
LT		 548 if (params->silence_size >= runtime->boundary) {
549 if (params->silence_threshold != 0)
550 return -EINVAL;
551 } else {
552 if (params->silence_size > params->silence_threshold)
553 return -EINVAL;
554 if (params->silence_threshold > runtime->buffer_size)
555 return -EINVAL;
556 }
1250932e 557 err = 0;
1da177e4
LT		 558 snd_pcm_stream_lock_irq(substream);
559 runtime->tstamp_mode = params->tstamp_mode;
1da177e4
LT		 560 runtime->period_step = params->period_step;
561 runtime->control->avail_min = params->avail_min;
562 runtime->start_threshold = params->start_threshold;
563 runtime->stop_threshold = params->stop_threshold;
564 runtime->silence_threshold = params->silence_threshold;
565 runtime->silence_size = params->silence_size;
1da177e4
LT		 566 params->boundary = runtime->boundary;
567 if (snd_pcm_running(substream)) {
1da177e4
LT		 568 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
569 runtime->silence_size > 0)
570 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 571 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 572 }
573 snd_pcm_stream_unlock_irq(substream);
1250932e 574 return err;
1da177e4
LT		 575}
576
877211f5
TI		 577static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
578 struct snd_pcm_sw_params __user * _params)
1da177e4 579{
877211f5 580 struct snd_pcm_sw_params params;
1da177e4
LT		 581 int err;
582 if (copy_from_user(&params, _params, sizeof(params)))
583 return -EFAULT;
584 err = snd_pcm_sw_params(substream, &params);
585 if (copy_to_user(_params, &params, sizeof(params)))
586 return -EFAULT;
587 return err;
588}
589
877211f5
TI		 590int snd_pcm_status(struct snd_pcm_substream *substream,
591 struct snd_pcm_status *status)
1da177e4 592{
877211f5 593 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 594
595 snd_pcm_stream_lock_irq(substream);
596 status->state = runtime->status->state;
597 status->suspended_state = runtime->status->suspended_state;
598 if (status->state == SNDRV_PCM_STATE_OPEN)
599 goto _end;
600 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 601 if (snd_pcm_running(substream)) {
1da177e4 602 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 603 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
604 status->tstamp = runtime->status->tstamp;
605 goto _tstamp_end;
606 }
607 }
a713b583 608 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 609 _tstamp_end:
1da177e4
LT		 610 status->appl_ptr = runtime->control->appl_ptr;
611 status->hw_ptr = runtime->status->hw_ptr;
612 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
613 status->avail = snd_pcm_playback_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 615 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 616 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 617 status->delay += runtime->delay;
618 } else
1da177e4
LT		 619 status->delay = 0;
620 } else {
621 status->avail = snd_pcm_capture_avail(runtime);
622 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 623 status->delay = status->avail + runtime->delay;
1da177e4
LT		 624 else
625 status->delay = 0;
626 }
627 status->avail_max = runtime->avail_max;
628 status->overrange = runtime->overrange;
629 runtime->avail_max = 0;
630 runtime->overrange = 0;
631 _end:
632 snd_pcm_stream_unlock_irq(substream);
633 return 0;
634}
635
877211f5
TI		 636static int snd_pcm_status_user(struct snd_pcm_substream *substream,
637 struct snd_pcm_status __user * _status)
1da177e4 638{
877211f5 639 struct snd_pcm_status status;
1da177e4
LT		 640 int res;
641
1da177e4
LT		 642 memset(&status, 0, sizeof(status));
643 res = snd_pcm_status(substream, &status);
644 if (res < 0)
645 return res;
646 if (copy_to_user(_status, &status, sizeof(status)))
647 return -EFAULT;
648 return 0;
649}
650
877211f5
TI		 651static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
652 struct snd_pcm_channel_info * info)
1da177e4 653{
877211f5 654 struct snd_pcm_runtime *runtime;
1da177e4
LT		 655 unsigned int channel;
656
1da177e4
LT		 657 channel = info->channel;
658 runtime = substream->runtime;
659 snd_pcm_stream_lock_irq(substream);
660 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
661 snd_pcm_stream_unlock_irq(substream);
662 return -EBADFD;
663 }
664 snd_pcm_stream_unlock_irq(substream);
665 if (channel >= runtime->channels)
666 return -EINVAL;
667 memset(info, 0, sizeof(*info));
668 info->channel = channel;
669 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
670}
671
877211f5
TI		 672static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
673 struct snd_pcm_channel_info __user * _info)
1da177e4 674{
877211f5 675 struct snd_pcm_channel_info info;
1da177e4
LT		 676 int res;
677
678 if (copy_from_user(&info, _info, sizeof(info)))
679 return -EFAULT;
680 res = snd_pcm_channel_info(substream, &info);
681 if (res < 0)
682 return res;
683 if (copy_to_user(_info, &info, sizeof(info)))
684 return -EFAULT;
685 return 0;
686}
687
877211f5 688static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 689{
877211f5 690 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 691 if (runtime->trigger_master == NULL)
692 return;
693 if (runtime->trigger_master == substream) {
b751eef1 694 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 695 } else {
696 snd_pcm_trigger_tstamp(runtime->trigger_master);
697 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
698 }
699 runtime->trigger_master = NULL;
700}
701
702struct action_ops {
877211f5
TI		 703 int (*pre_action)(struct snd_pcm_substream *substream, int state);
704 int (*do_action)(struct snd_pcm_substream *substream, int state);
705 void (*undo_action)(struct snd_pcm_substream *substream, int state);
706 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 707};
708
709/*
710 * this functions is core for handling of linked stream
711 * Note: the stream state might be changed also on failure
712 * Note2: call with calling stream lock + link lock
713 */
714static int snd_pcm_action_group(struct action_ops *ops,
877211f5 715 struct snd_pcm_substream *substream,
1da177e4
LT		 716 int state, int do_lock)
717{
877211f5
TI		 718 struct snd_pcm_substream *s = NULL;
719 struct snd_pcm_substream *s1;
1da177e4
LT		 720 int res = 0;
721
ef991b95 722 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 723 if (do_lock && s != substream)
208eee2a
FD		 724 spin_lock_nested(&s->self_group.lock,
725 SINGLE_DEPTH_NESTING);
1da177e4
LT		 726 res = ops->pre_action(s, state);
727 if (res < 0)
728 goto _unlock;
729 }
ef991b95 730 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 731 res = ops->do_action(s, state);
732 if (res < 0) {
733 if (ops->undo_action) {
ef991b95 734 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 735 if (s1 == s) /* failed stream */
736 break;
737 ops->undo_action(s1, state);
738 }
739 }
740 s = NULL; /* unlock all */
741 goto _unlock;
742 }
743 }
ef991b95 744 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 745 ops->post_action(s, state);
746 }
747 _unlock:
748 if (do_lock) {
749 /* unlock streams */
ef991b95 750 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 751 if (s1 != substream)
752 spin_unlock(&s1->self_group.lock);
753 if (s1 == s) /* end */
754 break;
755 }
756 }
757 return res;
758}
759
760/*
761 * Note: call with stream lock
762 */
763static int snd_pcm_action_single(struct action_ops *ops,
877211f5 764 struct snd_pcm_substream *substream,
1da177e4
LT		 765 int state)
766{
767 int res;
768
769 res = ops->pre_action(substream, state);
770 if (res < 0)
771 return res;
772 res = ops->do_action(substream, state);
773 if (res == 0)
774 ops->post_action(substream, state);
775 else if (ops->undo_action)
776 ops->undo_action(substream, state);
777 return res;
778}
779
780/*
781 * Note: call with stream lock
782 */
783static int snd_pcm_action(struct action_ops *ops,
877211f5 784 struct snd_pcm_substream *substream,
1da177e4
LT		 785 int state)
786{
787 int res;
788
789 if (snd_pcm_stream_linked(substream)) {
790 if (!spin_trylock(&substream->group->lock)) {
791 spin_unlock(&substream->self_group.lock);
792 spin_lock(&substream->group->lock);
793 spin_lock(&substream->self_group.lock);
794 }
795 res = snd_pcm_action_group(ops, substream, state, 1);
796 spin_unlock(&substream->group->lock);
797 } else {
798 res = snd_pcm_action_single(ops, substream, state);
799 }
800 return res;
801}
802
803/*
804 * Note: don't use any locks before
805 */
806static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 807 struct snd_pcm_substream *substream,
1da177e4
LT		 808 int state)
809{
810 int res;
811
812 read_lock_irq(&snd_pcm_link_rwlock);
813 if (snd_pcm_stream_linked(substream)) {
814 spin_lock(&substream->group->lock);
815 spin_lock(&substream->self_group.lock);
816 res = snd_pcm_action_group(ops, substream, state, 1);
817 spin_unlock(&substream->self_group.lock);
818 spin_unlock(&substream->group->lock);
819 } else {
820 spin_lock(&substream->self_group.lock);
821 res = snd_pcm_action_single(ops, substream, state);
822 spin_unlock(&substream->self_group.lock);
823 }
824 read_unlock_irq(&snd_pcm_link_rwlock);
825 return res;
826}
827
828/*
829 */
830static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 831 struct snd_pcm_substream *substream,
1da177e4
LT		 832 int state)
833{
834 int res;
835
836 down_read(&snd_pcm_link_rwsem);
837 if (snd_pcm_stream_linked(substream))
838 res = snd_pcm_action_group(ops, substream, state, 0);
839 else
840 res = snd_pcm_action_single(ops, substream, state);
841 up_read(&snd_pcm_link_rwsem);
842 return res;
843}
844
845/*
846 * start callbacks
847 */
877211f5 848static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 849{
877211f5 850 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 851 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
852 return -EBADFD;
853 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
854 !snd_pcm_playback_data(substream))
855 return -EPIPE;
856 runtime->trigger_master = substream;
857 return 0;
858}
859
877211f5 860static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 861{
862 if (substream->runtime->trigger_master != substream)
863 return 0;
864 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
865}
866
877211f5 867static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 868{
869 if (substream->runtime->trigger_master == substream)
870 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
871}
872
877211f5 873static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 874{
877211f5 875 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 876 snd_pcm_trigger_tstamp(substream);
6af3fb72 877 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 878 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
879 runtime->rate;
1da177e4
LT		 880 runtime->status->state = state;
881 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
882 runtime->silence_size > 0)
883 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 884 if (substream->timer)
877211f5
TI		 885 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
886 &runtime->trigger_tstamp);
1da177e4
LT		 887}
888
889static struct action_ops snd_pcm_action_start = {
890 .pre_action = snd_pcm_pre_start,
891 .do_action = snd_pcm_do_start,
892 .undo_action = snd_pcm_undo_start,
893 .post_action = snd_pcm_post_start
894};
895
896/**
1c85cc64 897 * snd_pcm_start - start all linked streams
df8db936 898 * @substream: the PCM substream instance
1da177e4 899 */
877211f5 900int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 901{
877211f5
TI		 902 return snd_pcm_action(&snd_pcm_action_start, substream,
903 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 904}
905
906/*
907 * stop callbacks
908 */
877211f5 909static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 910{
877211f5 911 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 912 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
913 return -EBADFD;
914 runtime->trigger_master = substream;
915 return 0;
916}
917
877211f5 918static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 919{
920 if (substream->runtime->trigger_master == substream &&
921 snd_pcm_running(substream))
922 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
923 return 0; /* unconditonally stop all substreams */
924}
925
877211f5 926static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 927{
877211f5 928 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 929 if (runtime->status->state != state) {
930 snd_pcm_trigger_tstamp(substream);
931 if (substream->timer)
877211f5
TI		 932 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
933 &runtime->trigger_tstamp);
1da177e4 934 runtime->status->state = state;
1da177e4
LT		 935 }
936 wake_up(&runtime->sleep);
c91a988d 937 wake_up(&runtime->tsleep);
1da177e4
LT		 938}
939
940static struct action_ops snd_pcm_action_stop = {
941 .pre_action = snd_pcm_pre_stop,
942 .do_action = snd_pcm_do_stop,
943 .post_action = snd_pcm_post_stop
944};
945
946/**
1c85cc64 947 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 948 * @substream: the PCM substream instance
949 * @state: PCM state after stopping the stream
1da177e4 950 *
1c85cc64 951 * The state of each stream is then changed to the given state unconditionally.
1da177e4 952 */
fea952e5 953int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 954{
955 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
956}
957
e88e8ae6
TI		 958EXPORT_SYMBOL(snd_pcm_stop);
959
1da177e4 960/**
1c85cc64 961 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 962 * @substream: the PCM substream
1da177e4 963 *
1c85cc64 964 * After stopping, the state is changed to SETUP.
1da177e4
LT		 965 * Unlike snd_pcm_stop(), this affects only the given stream.
966 */
877211f5 967int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 968{
877211f5
TI		 969 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
970 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 971}
972
973/*
974 * pause callbacks
975 */
877211f5 976static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 977{
877211f5 978 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 979 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
980 return -ENOSYS;
981 if (push) {
982 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
983 return -EBADFD;
984 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
985 return -EBADFD;
986 runtime->trigger_master = substream;
987 return 0;
988}
989
877211f5 990static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 991{
992 if (substream->runtime->trigger_master != substream)
993 return 0;
56385a12
JK		 994 /* some drivers might use hw_ptr to recover from the pause -
995 update the hw_ptr now */
996 if (push)
997 snd_pcm_update_hw_ptr(substream);
6af3fb72 998 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 999 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1000 * delta, effectively to skip the check once.
1001 */
1002 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1003 return substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1005 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1006}
1007
877211f5 1008static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1009{
1010 if (substream->runtime->trigger_master == substream)
1011 substream->ops->trigger(substream,
1012 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1013 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1014}
1015
877211f5 1016static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1017{
877211f5 1018 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1019 snd_pcm_trigger_tstamp(substream);
1020 if (push) {
1021 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1022 if (substream->timer)
877211f5
TI		 1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MPAUSE,
1025 &runtime->trigger_tstamp);
1da177e4 1026 wake_up(&runtime->sleep);
c91a988d 1027 wake_up(&runtime->tsleep);
1da177e4
LT		 1028 } else {
1029 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1030 if (substream->timer)
877211f5
TI		 1031 snd_timer_notify(substream->timer,
1032 SNDRV_TIMER_EVENT_MCONTINUE,
1033 &runtime->trigger_tstamp);
1da177e4
LT		 1034 }
1035}
1036
1037static struct action_ops snd_pcm_action_pause = {
1038 .pre_action = snd_pcm_pre_pause,
1039 .do_action = snd_pcm_do_pause,
1040 .undo_action = snd_pcm_undo_pause,
1041 .post_action = snd_pcm_post_pause
1042};
1043
1044/*
1045 * Push/release the pause for all linked streams.
1046 */
877211f5 1047static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1048{
1049 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1050}
1051
1052#ifdef CONFIG_PM
1053/* suspend */
1054
877211f5 1055static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1056{
877211f5 1057 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1058 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1059 return -EBUSY;
1060 runtime->trigger_master = substream;
1061 return 0;
1062}
1063
877211f5 1064static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1065{
877211f5 1066 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1067 if (runtime->trigger_master != substream)
1068 return 0;
1069 if (! snd_pcm_running(substream))
1070 return 0;
1071 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1072 return 0; /* suspend unconditionally */
1073}
1074
877211f5 1075static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1076{
877211f5 1077 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1078 snd_pcm_trigger_tstamp(substream);
1079 if (substream->timer)
877211f5
TI		 1080 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1081 &runtime->trigger_tstamp);
1da177e4
LT		 1082 runtime->status->suspended_state = runtime->status->state;
1083 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1084 wake_up(&runtime->sleep);
c91a988d 1085 wake_up(&runtime->tsleep);
1da177e4
LT		 1086}
1087
1088static struct action_ops snd_pcm_action_suspend = {
1089 .pre_action = snd_pcm_pre_suspend,
1090 .do_action = snd_pcm_do_suspend,
1091 .post_action = snd_pcm_post_suspend
1092};
1093
1094/**
1c85cc64 1095 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1096 * @substream: the PCM substream
1da177e4 1097 *
1da177e4
LT		 1098 * After this call, all streams are changed to SUSPENDED state.
1099 */
877211f5 1100int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1101{
1102 int err;
1103 unsigned long flags;
1104
603bf524
TI		 1105 if (! substream)
1106 return 0;
1107
1da177e4
LT		 1108 snd_pcm_stream_lock_irqsave(substream, flags);
1109 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1110 snd_pcm_stream_unlock_irqrestore(substream, flags);
1111 return err;
1112}
1113
e88e8ae6
TI		 1114EXPORT_SYMBOL(snd_pcm_suspend);
1115
1da177e4 1116/**
1c85cc64 1117 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1118 * @pcm: the PCM instance
1da177e4 1119 *
1da177e4
LT		 1120 * After this call, all streams are changed to SUSPENDED state.
1121 */
877211f5 1122int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1123{
877211f5 1124 struct snd_pcm_substream *substream;
1da177e4
LT		 1125 int stream, err = 0;
1126
603bf524
TI		 1127 if (! pcm)
1128 return 0;
1129
1da177e4 1130 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1131 for (substream = pcm->streams[stream].substream;
1132 substream; substream = substream->next) {
1da177e4
LT		 1133 /* FIXME: the open/close code should lock this as well */
1134 if (substream->runtime == NULL)
1135 continue;
1136 err = snd_pcm_suspend(substream);
1137 if (err < 0 && err != -EBUSY)
1138 return err;
1139 }
1140 }
1141 return 0;
1142}
1143
e88e8ae6
TI		 1144EXPORT_SYMBOL(snd_pcm_suspend_all);
1145
1da177e4
LT		 1146/* resume */
1147
877211f5 1148static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1149{
877211f5 1150 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1151 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1152 return -ENOSYS;
1153 runtime->trigger_master = substream;
1154 return 0;
1155}
1156
877211f5 1157static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1158{
877211f5 1159 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1160 if (runtime->trigger_master != substream)
1161 return 0;
1162 /* DMA not running previously? */
1163 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1164 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1165 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1166 return 0;
1167 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1168}
1169
877211f5 1170static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1171{
1172 if (substream->runtime->trigger_master == substream &&
1173 snd_pcm_running(substream))
1174 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1175}
1176
877211f5 1177static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1178{
877211f5 1179 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1180 snd_pcm_trigger_tstamp(substream);
1181 if (substream->timer)
877211f5
TI		 1182 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1183 &runtime->trigger_tstamp);
1da177e4 1184 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1185}
1186
1187static struct action_ops snd_pcm_action_resume = {
1188 .pre_action = snd_pcm_pre_resume,
1189 .do_action = snd_pcm_do_resume,
1190 .undo_action = snd_pcm_undo_resume,
1191 .post_action = snd_pcm_post_resume
1192};
1193
877211f5 1194static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1195{
877211f5 1196 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1197 int res;
1198
1199 snd_power_lock(card);
cbac4b0c 1200 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1201 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1202 snd_power_unlock(card);
1203 return res;
1204}
1205
1206#else
1207
877211f5 1208static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1209{
1210 return -ENOSYS;
1211}
1212
1213#endif /* CONFIG_PM */
1214
1215/*
1216 * xrun ioctl
1217 *
1218 * Change the RUNNING stream(s) to XRUN state.
1219 */
877211f5 1220static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1221{
877211f5
TI		 1222 struct snd_card *card = substream->pcm->card;
1223 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1224 int result;
1225
1226 snd_power_lock(card);
1227 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1228 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1229 if (result < 0)
1230 goto _unlock;
1231 }
1232
1233 snd_pcm_stream_lock_irq(substream);
1234 switch (runtime->status->state) {
1235 case SNDRV_PCM_STATE_XRUN:
1236 result = 0; /* already there */
1237 break;
1238 case SNDRV_PCM_STATE_RUNNING:
1239 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1240 break;
1241 default:
1242 result = -EBADFD;
1243 }
1244 snd_pcm_stream_unlock_irq(substream);
1245 _unlock:
1246 snd_power_unlock(card);
1247 return result;
1248}
1249
1250/*
1251 * reset ioctl
1252 */
877211f5 1253static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1254{
877211f5 1255 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1256 switch (runtime->status->state) {
1257 case SNDRV_PCM_STATE_RUNNING:
1258 case SNDRV_PCM_STATE_PREPARED:
1259 case SNDRV_PCM_STATE_PAUSED:
1260 case SNDRV_PCM_STATE_SUSPENDED:
1261 return 0;
1262 default:
1263 return -EBADFD;
1264 }
1265}
1266
877211f5 1267static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1268{
877211f5 1269 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1270 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1271 if (err < 0)
1272 return err;
1da177e4 1273 runtime->hw_ptr_base = 0;
e7636925
JK		 1274 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1275 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1276 runtime->silence_start = runtime->status->hw_ptr;
1277 runtime->silence_filled = 0;
1278 return 0;
1279}
1280
877211f5 1281static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1282{
877211f5 1283 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1284 runtime->control->appl_ptr = runtime->status->hw_ptr;
1285 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1286 runtime->silence_size > 0)
1287 snd_pcm_playback_silence(substream, ULONG_MAX);
1288}
1289
1290static struct action_ops snd_pcm_action_reset = {
1291 .pre_action = snd_pcm_pre_reset,
1292 .do_action = snd_pcm_do_reset,
1293 .post_action = snd_pcm_post_reset
1294};
1295
877211f5 1296static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1297{
1298 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1299}
1300
1301/*
1302 * prepare ioctl
1303 */
0df63e44
TI		 1304/* we use the second argument for updating f_flags */
1305static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1306 int f_flags)
1da177e4 1307{
877211f5 1308 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1309 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1310 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1311 return -EBADFD;
1312 if (snd_pcm_running(substream))
1313 return -EBUSY;
0df63e44 1314 substream->f_flags = f_flags;
1da177e4
LT		 1315 return 0;
1316}
1317
877211f5 1318static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1319{
1320 int err;
1321 err = substream->ops->prepare(substream);
1322 if (err < 0)
1323 return err;
1324 return snd_pcm_do_reset(substream, 0);
1325}
1326
877211f5 1327static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1328{
877211f5 1329 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1330 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1331 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1332}
1333
1334static struct action_ops snd_pcm_action_prepare = {
1335 .pre_action = snd_pcm_pre_prepare,
1336 .do_action = snd_pcm_do_prepare,
1337 .post_action = snd_pcm_post_prepare
1338};
1339
1340/**
1c85cc64 1341 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1342 * @substream: the PCM substream instance
0df63e44 1343 * @file: file to refer f_flags
1da177e4 1344 */
0df63e44
TI		 1345static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1346 struct file *file)
1da177e4
LT		 1347{
1348 int res;
877211f5 1349 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1350 int f_flags;
1351
1352 if (file)
1353 f_flags = file->f_flags;
1354 else
1355 f_flags = substream->f_flags;
1da177e4
LT		 1356
1357 snd_power_lock(card);
cbac4b0c 1358 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1359 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1360 substream, f_flags);
1da177e4
LT		 1361 snd_power_unlock(card);
1362 return res;
1363}
1364
1365/*
1366 * drain ioctl
1367 */
1368
877211f5 1369static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1370{
4f7c39dc
TI		 1371 struct snd_pcm_runtime *runtime = substream->runtime;
1372 switch (runtime->status->state) {
1373 case SNDRV_PCM_STATE_OPEN:
1374 case SNDRV_PCM_STATE_DISCONNECTED:
1375 case SNDRV_PCM_STATE_SUSPENDED:
1376 return -EBADFD;
1377 }
1378 runtime->trigger_master = substream;
1da177e4
LT		 1379 return 0;
1380}
1381
877211f5 1382static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1383{
877211f5 1384 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1386 switch (runtime->status->state) {
1387 case SNDRV_PCM_STATE_PREPARED:
1388 /* start playback stream if possible */
1389 if (! snd_pcm_playback_empty(substream)) {
1390 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1391 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1392 }
1393 break;
1394 case SNDRV_PCM_STATE_RUNNING:
1395 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1396 break;
4f7c39dc
TI		 1397 case SNDRV_PCM_STATE_XRUN:
1398 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1399 break;
1da177e4
LT		 1400 default:
1401 break;
1402 }
1403 } else {
1404 /* stop running stream */
1405 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1406 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1407 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1408 snd_pcm_do_stop(substream, new_state);
1409 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1410 }
1411 }
1412 return 0;
1413}
1414
877211f5 1415static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1416{
1417}
1418
1419static struct action_ops snd_pcm_action_drain_init = {
1420 .pre_action = snd_pcm_pre_drain_init,
1421 .do_action = snd_pcm_do_drain_init,
1422 .post_action = snd_pcm_post_drain_init
1423};
1424
877211f5 1425static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1426
1427/*
1428 * Drain the stream(s).
1429 * When the substream is linked, sync until the draining of all playback streams
1430 * is finished.
1431 * After this call, all streams are supposed to be either SETUP or DRAINING
1432 * (capture only) state.
1433 */
4cdc115f
TI		 1434static int snd_pcm_drain(struct snd_pcm_substream *substream,
1435 struct file *file)
1da177e4 1436{
877211f5
TI		 1437 struct snd_card *card;
1438 struct snd_pcm_runtime *runtime;
ef991b95 1439 struct snd_pcm_substream *s;
d3a7dcfe 1440 wait_queue_t wait;
1da177e4 1441 int result = 0;
4cdc115f 1442 int nonblock = 0;
1da177e4 1443
1da177e4
LT		 1444 card = substream->pcm->card;
1445 runtime = substream->runtime;
1446
1447 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1448 return -EBADFD;
1449
1da177e4
LT		 1450 snd_power_lock(card);
1451 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1452 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1453 if (result < 0) {
1454 snd_power_unlock(card);
1455 return result;
1456 }
1da177e4
LT		 1457 }
1458
4cdc115f
TI		 1459 if (file) {
1460 if (file->f_flags & O_NONBLOCK)
1461 nonblock = 1;
1462 } else if (substream->f_flags & O_NONBLOCK)
1463 nonblock = 1;
1464
21cb2a2e 1465 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1466 snd_pcm_stream_lock_irq(substream);
1467 /* resume pause */
d3a7dcfe 1468 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1469 snd_pcm_pause(substream, 0);
1470
1471 /* pre-start/stop - all running streams are changed to DRAINING state */
1472 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1473 if (result < 0)
1474 goto unlock;
1475 /* in non-blocking, we don't wait in ioctl but let caller poll */
1476 if (nonblock) {
1477 result = -EAGAIN;
1478 goto unlock;
21cb2a2e 1479 }
1da177e4
LT		 1480
1481 for (;;) {
1482 long tout;
d3a7dcfe 1483 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1484 if (signal_pending(current)) {
1485 result = -ERESTARTSYS;
1486 break;
1487 }
d3a7dcfe
TI		 1488 /* find a substream to drain */
1489 to_check = NULL;
1490 snd_pcm_group_for_each_entry(s, substream) {
1491 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1492 continue;
1493 runtime = s->runtime;
1494 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1495 to_check = runtime;
21cb2a2e 1496 break;
d3a7dcfe 1497 }
21cb2a2e 1498 }
d3a7dcfe
TI		 1499 if (!to_check)
1500 break; /* all drained */
1501 init_waitqueue_entry(&wait, current);
1502 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1503 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1504 up_read(&snd_pcm_link_rwsem);
1da177e4 1505 snd_power_unlock(card);
f2b3614c
TI		 1506 if (runtime->no_period_wakeup)
1507 tout = MAX_SCHEDULE_TIMEOUT;
1508 else {
1509 tout = 10;
1510 if (runtime->rate) {
1511 long t = runtime->period_size * 2 / runtime->rate;
1512 tout = max(t, tout);
1513 }
1514 tout = msecs_to_jiffies(tout * 1000);
1515 }
1516 tout = schedule_timeout_interruptible(tout);
1da177e4 1517 snd_power_lock(card);
d3a7dcfe 1518 down_read(&snd_pcm_link_rwsem);
1da177e4 1519 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1520 remove_wait_queue(&to_check->sleep, &wait);
1da177e4
LT		 1521 if (tout == 0) {
1522 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1523 result = -ESTRPIPE;
1524 else {
1525 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1526 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1527 result = -EIO;
1528 }
1529 break;
1530 }
1da177e4 1531 }
21cb2a2e 1532
4cdc115f 1533 unlock:
21cb2a2e 1534 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1535 up_read(&snd_pcm_link_rwsem);
1da177e4 1536 snd_power_unlock(card);
1da177e4
LT		 1537
1538 return result;
1539}
1540
1541/*
1542 * drop ioctl
1543 *
1544 * Immediately put all linked substreams into SETUP state.
1545 */
877211f5 1546static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1547{
877211f5 1548 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1549 int result = 0;
1550
7eaa943c
TI		 1551 if (PCM_RUNTIME_CHECK(substream))
1552 return -ENXIO;
1da177e4 1553 runtime = substream->runtime;
1da177e4 1554
de1b8b93 1555 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1556 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1557 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1558 return -EBADFD;
1559
1da177e4
LT		 1560 snd_pcm_stream_lock_irq(substream);
1561 /* resume pause */
1562 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1563 snd_pcm_pause(substream, 0);
1564
1565 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1566 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1568
1da177e4
LT		 1569 return result;
1570}
1571
1572
1573/* WARNING: Don't forget to fput back the file */
bdbf6943 1574static struct file *snd_pcm_file_fd(int fd, int *fput_needed)
1da177e4
LT		 1575{
1576 struct file *file;
1577 struct inode *inode;
f87135f5
CL		 1578 unsigned int minor;
1579
bdbf6943 1580 file = fget_light(fd, fput_needed);
1da177e4
LT		 1581 if (!file)
1582 return NULL;
7bc56323 1583 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1584 if (!S_ISCHR(inode->i_mode) ||
1585 imajor(inode) != snd_major) {
bdbf6943 1586 fput_light(file, *fput_needed);
1da177e4
LT		 1587 return NULL;
1588 }
1589 minor = iminor(inode);
f87135f5
CL		 1590 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1591 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
bdbf6943 1592 fput_light(file, *fput_needed);
1da177e4
LT		 1593 return NULL;
1594 }
1595 return file;
1596}
1597
1598/*
1599 * PCM link handling
1600 */
877211f5 1601static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1602{
1603 int res = 0;
1604 struct file *file;
877211f5
TI		 1605 struct snd_pcm_file *pcm_file;
1606 struct snd_pcm_substream *substream1;
1662591b 1607 struct snd_pcm_group *group;
bdbf6943 1608 int fput_needed;
1da177e4 1609
bdbf6943 1610 file = snd_pcm_file_fd(fd, &fput_needed);
1da177e4
LT		 1611 if (!file)
1612 return -EBADFD;
1613 pcm_file = file->private_data;
1614 substream1 = pcm_file->substream;
1662591b
TI		 1615 group = kmalloc(sizeof(*group), GFP_KERNEL);
1616 if (!group) {
1617 res = -ENOMEM;
1618 goto _nolock;
1619 }
1da177e4
LT		 1620 down_write(&snd_pcm_link_rwsem);
1621 write_lock_irq(&snd_pcm_link_rwlock);
1622 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1623 substream->runtime->status->state != substream1->runtime->status->state) {
1624 res = -EBADFD;
1625 goto _end;
1626 }
1627 if (snd_pcm_stream_linked(substream1)) {
1628 res = -EALREADY;
1629 goto _end;
1630 }
1631 if (!snd_pcm_stream_linked(substream)) {
1662591b 1632 substream->group = group;
1da177e4
LT		 1633 spin_lock_init(&substream->group->lock);
1634 INIT_LIST_HEAD(&substream->group->substreams);
1635 list_add_tail(&substream->link_list, &substream->group->substreams);
1636 substream->group->count = 1;
1637 }
1638 list_add_tail(&substream1->link_list, &substream->group->substreams);
1639 substream->group->count++;
1640 substream1->group = substream->group;
1641 _end:
1642 write_unlock_irq(&snd_pcm_link_rwlock);
1643 up_write(&snd_pcm_link_rwsem);
1662591b 1644 _nolock:
a0830dbd 1645 snd_card_unref(substream1->pcm->card);
bdbf6943 1646 fput_light(file, fput_needed);
1662591b
TI		 1647 if (res < 0)
1648 kfree(group);
1da177e4
LT		 1649 return res;
1650}
1651
877211f5 1652static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1653{
1654 substream->group = &substream->self_group;
1655 INIT_LIST_HEAD(&substream->self_group.substreams);
1656 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1657}
1658
877211f5 1659static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1660{
ef991b95 1661 struct snd_pcm_substream *s;
1da177e4
LT		 1662 int res = 0;
1663
1664 down_write(&snd_pcm_link_rwsem);
1665 write_lock_irq(&snd_pcm_link_rwlock);
1666 if (!snd_pcm_stream_linked(substream)) {
1667 res = -EALREADY;
1668 goto _end;
1669 }
1670 list_del(&substream->link_list);
1671 substream->group->count--;
1672 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1673 snd_pcm_group_for_each_entry(s, substream) {
1674 relink_to_local(s);
1da177e4
LT		 1675 break;
1676 }
1677 kfree(substream->group);
1678 }
1679 relink_to_local(substream);
1680 _end:
1681 write_unlock_irq(&snd_pcm_link_rwlock);
1682 up_write(&snd_pcm_link_rwsem);
1683 return res;
1684}
1685
1686/*
1687 * hw configurator
1688 */
877211f5
TI		 1689static int snd_pcm_hw_rule_mul(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_mul(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_div(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_div(hw_param_interval_c(params, rule->deps[0]),
1703 hw_param_interval_c(params, rule->deps[1]), &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705}
1706
877211f5
TI		 1707static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1da177e4 1709{
877211f5 1710 struct snd_interval t;
1da177e4
LT		 1711 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1712 hw_param_interval_c(params, rule->deps[1]),
1713 (unsigned long) rule->private, &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1715}
1716
877211f5
TI		 1717static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1718 struct snd_pcm_hw_rule *rule)
1da177e4 1719{
877211f5 1720 struct snd_interval t;
1da177e4
LT		 1721 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1722 (unsigned long) rule->private,
1723 hw_param_interval_c(params, rule->deps[1]), &t);
1724 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1725}
1726
877211f5
TI		 1727static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1728 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1729{
1730 unsigned int k;
877211f5
TI		 1731 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1732 struct snd_mask m;
1733 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1734 snd_mask_any(&m);
1735 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1736 int bits;
1737 if (! snd_mask_test(mask, k))
1738 continue;
1739 bits = snd_pcm_format_physical_width(k);
1740 if (bits <= 0)
1741 continue; /* ignore invalid formats */
1742 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1743 snd_mask_reset(&m, k);
1744 }
1745 return snd_mask_refine(mask, &m);
1746}
1747
877211f5
TI		 1748static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1749 struct snd_pcm_hw_rule *rule)
1da177e4 1750{
877211f5 1751 struct snd_interval t;
1da177e4
LT		 1752 unsigned int k;
1753 t.min = UINT_MAX;
1754 t.max = 0;
1755 t.openmin = 0;
1756 t.openmax = 0;
1757 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1758 int bits;
1759 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1760 continue;
1761 bits = snd_pcm_format_physical_width(k);
1762 if (bits <= 0)
1763 continue; /* ignore invalid formats */
1764 if (t.min > (unsigned)bits)
1765 t.min = bits;
1766 if (t.max < (unsigned)bits)
1767 t.max = bits;
1768 }
1769 t.integer = 1;
1770 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1771}
1772
1773#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1774#error "Change this table"
1775#endif
1776
1777static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1778 48000, 64000, 88200, 96000, 176400, 192000 };
1779
7653d557
CL		 1780const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1781 .count = ARRAY_SIZE(rates),
1782 .list = rates,
1783};
1784
877211f5
TI		 1785static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1786 struct snd_pcm_hw_rule *rule)
1da177e4 1787{
877211f5 1788 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1789 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1790 snd_pcm_known_rates.count,
1791 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1792}
1793
877211f5
TI		 1794static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1795 struct snd_pcm_hw_rule *rule)
1da177e4 1796{
877211f5
TI		 1797 struct snd_interval t;
1798 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1799 t.min = 0;
1800 t.max = substream->buffer_bytes_max;
1801 t.openmin = 0;
1802 t.openmax = 0;
1803 t.integer = 1;
1804 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1805}
1806
877211f5 1807int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1808{
877211f5
TI		 1809 struct snd_pcm_runtime *runtime = substream->runtime;
1810 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1811 int k, err;
1812
1813 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1814 snd_mask_any(constrs_mask(constrs, k));
1815 }
1816
1817 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1818 snd_interval_any(constrs_interval(constrs, k));
1819 }
1820
1821 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1822 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1823 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1824 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1825 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1826
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1828 snd_pcm_hw_rule_format, NULL,
1829 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1830 if (err < 0)
1831 return err;
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1833 snd_pcm_hw_rule_sample_bits, NULL,
1834 SNDRV_PCM_HW_PARAM_FORMAT,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1839 snd_pcm_hw_rule_div, NULL,
1840 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844 snd_pcm_hw_rule_mul, NULL,
1845 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1854 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1855 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1859 snd_pcm_hw_rule_div, NULL,
1860 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1864 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1865 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1869 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1871 if (err < 0)
1872 return err;
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1874 snd_pcm_hw_rule_div, NULL,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1876 if (err < 0)
1877 return err;
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1879 snd_pcm_hw_rule_div, NULL,
1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1881 if (err < 0)
1882 return err;
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1884 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1885 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1886 if (err < 0)
1887 return err;
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1889 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1890 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1891 if (err < 0)
1892 return err;
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1894 snd_pcm_hw_rule_mul, NULL,
1895 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1896 if (err < 0)
1897 return err;
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1899 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1901 if (err < 0)
1902 return err;
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1904 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1905 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1906 if (err < 0)
1907 return err;
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1909 snd_pcm_hw_rule_muldivk, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1911 if (err < 0)
1912 return err;
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1914 snd_pcm_hw_rule_muldivk, (void*) 8,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1916 if (err < 0)
1917 return err;
1918 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1919 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1920 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1921 if (err < 0)
1922 return err;
1923 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1924 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1925 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1926 if (err < 0)
1927 return err;
1928 return 0;
1929}
1930
877211f5 1931int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1932{
877211f5
TI		 1933 struct snd_pcm_runtime *runtime = substream->runtime;
1934 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1935 int err;
1936 unsigned int mask = 0;
1937
1938 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1939 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1940 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1941 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1942 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1943 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1944 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1945 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1946 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1947 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1948 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1949 }
1950 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 1951 if (err < 0)
1952 return err;
1da177e4
LT		 1953
1954 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 1955 if (err < 0)
1956 return err;
1da177e4
LT		 1957
1958 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 1959 if (err < 0)
1960 return err;
1da177e4
LT		 1961
1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1963 hw->channels_min, hw->channels_max);
7eaa943c
TI		 1964 if (err < 0)
1965 return err;
1da177e4
LT		 1966
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1968 hw->rate_min, hw->rate_max);
8b90ca08
GL		 1969 if (err < 0)
1970 return err;
1da177e4
LT		 1971
1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1973 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 1974 if (err < 0)
1975 return err;
1da177e4
LT		 1976
1977 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1978 hw->periods_min, hw->periods_max);
7eaa943c
TI		 1979 if (err < 0)
1980 return err;
1da177e4
LT		 1981
1982 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1983 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 1984 if (err < 0)
1985 return err;
1da177e4
LT		 1986
1987 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1988 snd_pcm_hw_rule_buffer_bytes_max, substream,
1989 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1990 if (err < 0)
1991 return err;
1992
1993 /* FIXME: remove */
1994 if (runtime->dma_bytes) {
1995 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c
TI		 1996 if (err < 0)
1997 return -EINVAL;
1da177e4
LT		 1998 }
1999
2000 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2001 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2002 snd_pcm_hw_rule_rate, hw,
2003 SNDRV_PCM_HW_PARAM_RATE, -1);
2004 if (err < 0)
2005 return err;
2006 }
2007
2008 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2009 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2010
2011 return 0;
2012}
2013
3bf75f9b 2014static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2015{
1da177e4 2016 snd_pcm_unlink(substream);
3bf75f9b
TI		 2017}
2018
2019void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2020{
0df63e44
TI		 2021 substream->ref_count--;
2022 if (substream->ref_count > 0)
2023 return;
2024
3bf75f9b 2025 snd_pcm_drop(substream);
3bf75f9b 2026 if (substream->hw_opened) {
1da177e4
LT		 2027 if (substream->ops->hw_free != NULL)
2028 substream->ops->hw_free(substream);
2029 substream->ops->close(substream);
3bf75f9b 2030 substream->hw_opened = 0;
1da177e4 2031 }
8699a0b6
TI		 2032 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2033 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2034 if (substream->pcm_release) {
2035 substream->pcm_release(substream);
2036 substream->pcm_release = NULL;
2037 }
3bf75f9b
TI		 2038 snd_pcm_detach_substream(substream);
2039}
2040
e88e8ae6
TI		 2041EXPORT_SYMBOL(snd_pcm_release_substream);
2042
3bf75f9b
TI		 2043int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2044 struct file *file,
2045 struct snd_pcm_substream **rsubstream)
2046{
2047 struct snd_pcm_substream *substream;
2048 int err;
2049
2050 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2051 if (err < 0)
2052 return err;
0df63e44
TI		 2053 if (substream->ref_count > 1) {
2054 *rsubstream = substream;
2055 return 0;
2056 }
2057
3bf75f9b
TI		 2058 err = snd_pcm_hw_constraints_init(substream);
2059 if (err < 0) {
2060 snd_printd("snd_pcm_hw_constraints_init failed\n");
2061 goto error;
2062 }
2063
2064 if ((err = substream->ops->open(substream)) < 0)
2065 goto error;
2066
2067 substream->hw_opened = 1;
2068
2069 err = snd_pcm_hw_constraints_complete(substream);
2070 if (err < 0) {
2071 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2072 goto error;
2073 }
2074
2075 *rsubstream = substream;
1da177e4 2076 return 0;
3bf75f9b
TI		 2077
2078 error:
2079 snd_pcm_release_substream(substream);
2080 return err;
1da177e4
LT		 2081}
2082
e88e8ae6
TI		 2083EXPORT_SYMBOL(snd_pcm_open_substream);
2084
1da177e4 2085static int snd_pcm_open_file(struct file *file,
877211f5 2086 struct snd_pcm *pcm,
ffd3d5c6 2087 int stream)
1da177e4 2088{
877211f5
TI		 2089 struct snd_pcm_file *pcm_file;
2090 struct snd_pcm_substream *substream;
3bf75f9b 2091 int err;
1da177e4 2092
3bf75f9b
TI		 2093 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2094 if (err < 0)
2095 return err;
2096
548a648b
TI		 2097 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2098 if (pcm_file == NULL) {
2099 snd_pcm_release_substream(substream);
2100 return -ENOMEM;
2101 }
2102 pcm_file->substream = substream;
2103 if (substream->ref_count == 1) {
0df63e44
TI		 2104 substream->file = pcm_file;
2105 substream->pcm_release = pcm_release_private;
1da177e4 2106 }
1da177e4 2107 file->private_data = pcm_file;
ffd3d5c6 2108
1da177e4
LT		 2109 return 0;
2110}
2111
f87135f5
CL		 2112static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2113{
2114 struct snd_pcm *pcm;
02f4865f
TI		 2115 int err = nonseekable_open(inode, file);
2116 if (err < 0)
2117 return err;
f87135f5
CL		 2118 pcm = snd_lookup_minor_data(iminor(inode),
2119 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd
TI		 2120 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2121 snd_card_unref(pcm->card);
2122 return err;
f87135f5
CL		 2123}
2124
2125static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2126{
877211f5 2127 struct snd_pcm *pcm;
02f4865f
TI		 2128 int err = nonseekable_open(inode, file);
2129 if (err < 0)
2130 return err;
f87135f5
CL		 2131 pcm = snd_lookup_minor_data(iminor(inode),
2132 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd
TI		 2133 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2134 snd_card_unref(pcm->card);
2135 return err;
f87135f5
CL		 2136}
2137
2138static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2139{
2140 int err;
1da177e4
LT		 2141 wait_queue_t wait;
2142
1da177e4
LT		 2143 if (pcm == NULL) {
2144 err = -ENODEV;
2145 goto __error1;
2146 }
2147 err = snd_card_file_add(pcm->card, file);
2148 if (err < 0)
2149 goto __error1;
2150 if (!try_module_get(pcm->card->module)) {
2151 err = -EFAULT;
2152 goto __error2;
2153 }
2154 init_waitqueue_entry(&wait, current);
2155 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2156 mutex_lock(&pcm->open_mutex);
1da177e4 2157 while (1) {
ffd3d5c6 2158 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2159 if (err >= 0)
2160 break;
2161 if (err == -EAGAIN) {
2162 if (file->f_flags & O_NONBLOCK) {
2163 err = -EBUSY;
2164 break;
2165 }
2166 } else
2167 break;
2168 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2169 mutex_unlock(&pcm->open_mutex);
1da177e4 2170 schedule();
1a60d4c5 2171 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2172 if (signal_pending(current)) {
2173 err = -ERESTARTSYS;
2174 break;
2175 }
2176 }
2177 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2178 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2179 if (err < 0)
2180 goto __error;
2181 return err;
2182
2183 __error:
2184 module_put(pcm->card->module);
2185 __error2:
2186 snd_card_file_remove(pcm->card, file);
2187 __error1:
2188 return err;
2189}
2190
2191static int snd_pcm_release(struct inode *inode, struct file *file)
2192{
877211f5
TI		 2193 struct snd_pcm *pcm;
2194 struct snd_pcm_substream *substream;
2195 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2196
2197 pcm_file = file->private_data;
2198 substream = pcm_file->substream;
7eaa943c
TI		 2199 if (snd_BUG_ON(!substream))
2200 return -ENXIO;
1da177e4 2201 pcm = substream->pcm;
1a60d4c5 2202 mutex_lock(&pcm->open_mutex);
3bf75f9b 2203 snd_pcm_release_substream(substream);
548a648b 2204 kfree(pcm_file);
1a60d4c5 2205 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2206 wake_up(&pcm->open_wait);
2207 module_put(pcm->card->module);
2208 snd_card_file_remove(pcm->card, file);
2209 return 0;
2210}
2211
877211f5
TI		 2212static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2213 snd_pcm_uframes_t frames)
1da177e4 2214{
877211f5 2215 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2216 snd_pcm_sframes_t appl_ptr;
2217 snd_pcm_sframes_t ret;
2218 snd_pcm_sframes_t hw_avail;
2219
2220 if (frames == 0)
2221 return 0;
2222
2223 snd_pcm_stream_lock_irq(substream);
2224 switch (runtime->status->state) {
2225 case SNDRV_PCM_STATE_PREPARED:
2226 break;
2227 case SNDRV_PCM_STATE_DRAINING:
2228 case SNDRV_PCM_STATE_RUNNING:
2229 if (snd_pcm_update_hw_ptr(substream) >= 0)
2230 break;
2231 /* Fall through */
2232 case SNDRV_PCM_STATE_XRUN:
2233 ret = -EPIPE;
2234 goto __end;
51840409
LR		 2235 case SNDRV_PCM_STATE_SUSPENDED:
2236 ret = -ESTRPIPE;
2237 goto __end;
1da177e4
LT		 2238 default:
2239 ret = -EBADFD;
2240 goto __end;
2241 }
2242
2243 hw_avail = snd_pcm_playback_hw_avail(runtime);
2244 if (hw_avail <= 0) {
2245 ret = 0;
2246 goto __end;
2247 }
2248 if (frames > (snd_pcm_uframes_t)hw_avail)
2249 frames = hw_avail;
1da177e4
LT		 2250 appl_ptr = runtime->control->appl_ptr - frames;
2251 if (appl_ptr < 0)
2252 appl_ptr += runtime->boundary;
2253 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2254 ret = frames;
2255 __end:
2256 snd_pcm_stream_unlock_irq(substream);
2257 return ret;
2258}
2259
877211f5
TI		 2260static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2261 snd_pcm_uframes_t frames)
1da177e4 2262{
877211f5 2263 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2264 snd_pcm_sframes_t appl_ptr;
2265 snd_pcm_sframes_t ret;
2266 snd_pcm_sframes_t hw_avail;
2267
2268 if (frames == 0)
2269 return 0;
2270
2271 snd_pcm_stream_lock_irq(substream);
2272 switch (runtime->status->state) {
2273 case SNDRV_PCM_STATE_PREPARED:
2274 case SNDRV_PCM_STATE_DRAINING:
2275 break;
2276 case SNDRV_PCM_STATE_RUNNING:
2277 if (snd_pcm_update_hw_ptr(substream) >= 0)
2278 break;
2279 /* Fall through */
2280 case SNDRV_PCM_STATE_XRUN:
2281 ret = -EPIPE;
2282 goto __end;
51840409
LR		 2283 case SNDRV_PCM_STATE_SUSPENDED:
2284 ret = -ESTRPIPE;
2285 goto __end;
1da177e4
LT		 2286 default:
2287 ret = -EBADFD;
2288 goto __end;
2289 }
2290
2291 hw_avail = snd_pcm_capture_hw_avail(runtime);
2292 if (hw_avail <= 0) {
2293 ret = 0;
2294 goto __end;
2295 }
2296 if (frames > (snd_pcm_uframes_t)hw_avail)
2297 frames = hw_avail;
1da177e4
LT		 2298 appl_ptr = runtime->control->appl_ptr - frames;
2299 if (appl_ptr < 0)
2300 appl_ptr += runtime->boundary;
2301 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2302 ret = frames;
2303 __end:
2304 snd_pcm_stream_unlock_irq(substream);
2305 return ret;
2306}
2307
877211f5
TI		 2308static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2309 snd_pcm_uframes_t frames)
1da177e4 2310{
877211f5 2311 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2312 snd_pcm_sframes_t appl_ptr;
2313 snd_pcm_sframes_t ret;
2314 snd_pcm_sframes_t avail;
2315
2316 if (frames == 0)
2317 return 0;
2318
2319 snd_pcm_stream_lock_irq(substream);
2320 switch (runtime->status->state) {
2321 case SNDRV_PCM_STATE_PREPARED:
2322 case SNDRV_PCM_STATE_PAUSED:
2323 break;
2324 case SNDRV_PCM_STATE_DRAINING:
2325 case SNDRV_PCM_STATE_RUNNING:
2326 if (snd_pcm_update_hw_ptr(substream) >= 0)
2327 break;
2328 /* Fall through */
2329 case SNDRV_PCM_STATE_XRUN:
2330 ret = -EPIPE;
2331 goto __end;
51840409
LR		 2332 case SNDRV_PCM_STATE_SUSPENDED:
2333 ret = -ESTRPIPE;
2334 goto __end;
1da177e4
LT		 2335 default:
2336 ret = -EBADFD;
2337 goto __end;
2338 }
2339
2340 avail = snd_pcm_playback_avail(runtime);
2341 if (avail <= 0) {
2342 ret = 0;
2343 goto __end;
2344 }
2345 if (frames > (snd_pcm_uframes_t)avail)
2346 frames = avail;
1da177e4
LT		 2347 appl_ptr = runtime->control->appl_ptr + frames;
2348 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2349 appl_ptr -= runtime->boundary;
2350 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2351 ret = frames;
2352 __end:
2353 snd_pcm_stream_unlock_irq(substream);
2354 return ret;
2355}
2356
877211f5
TI		 2357static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2358 snd_pcm_uframes_t frames)
1da177e4 2359{
877211f5 2360 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2361 snd_pcm_sframes_t appl_ptr;
2362 snd_pcm_sframes_t ret;
2363 snd_pcm_sframes_t avail;
2364
2365 if (frames == 0)
2366 return 0;
2367
2368 snd_pcm_stream_lock_irq(substream);
2369 switch (runtime->status->state) {
2370 case SNDRV_PCM_STATE_PREPARED:
2371 case SNDRV_PCM_STATE_DRAINING:
2372 case SNDRV_PCM_STATE_PAUSED:
2373 break;
2374 case SNDRV_PCM_STATE_RUNNING:
2375 if (snd_pcm_update_hw_ptr(substream) >= 0)
2376 break;
2377 /* Fall through */
2378 case SNDRV_PCM_STATE_XRUN:
2379 ret = -EPIPE;
2380 goto __end;
51840409
LR		 2381 case SNDRV_PCM_STATE_SUSPENDED:
2382 ret = -ESTRPIPE;
2383 goto __end;
1da177e4
LT		 2384 default:
2385 ret = -EBADFD;
2386 goto __end;
2387 }
2388
2389 avail = snd_pcm_capture_avail(runtime);
2390 if (avail <= 0) {
2391 ret = 0;
2392 goto __end;
2393 }
2394 if (frames > (snd_pcm_uframes_t)avail)
2395 frames = avail;
1da177e4
LT		 2396 appl_ptr = runtime->control->appl_ptr + frames;
2397 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2398 appl_ptr -= runtime->boundary;
2399 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2400 ret = frames;
2401 __end:
2402 snd_pcm_stream_unlock_irq(substream);
2403 return ret;
2404}
2405
877211f5 2406static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2407{
877211f5 2408 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2409 int err;
2410
2411 snd_pcm_stream_lock_irq(substream);
2412 switch (runtime->status->state) {
2413 case SNDRV_PCM_STATE_DRAINING:
2414 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2415 goto __badfd;
2416 case SNDRV_PCM_STATE_RUNNING:
2417 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2418 break;
2419 /* Fall through */
2420 case SNDRV_PCM_STATE_PREPARED:
2421 case SNDRV_PCM_STATE_SUSPENDED:
2422 err = 0;
2423 break;
2424 case SNDRV_PCM_STATE_XRUN:
2425 err = -EPIPE;
2426 break;
2427 default:
2428 __badfd:
2429 err = -EBADFD;
2430 break;
2431 }
2432 snd_pcm_stream_unlock_irq(substream);
2433 return err;
2434}
2435
877211f5
TI		 2436static int snd_pcm_delay(struct snd_pcm_substream *substream,
2437 snd_pcm_sframes_t __user *res)
1da177e4 2438{
877211f5 2439 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2440 int err;
2441 snd_pcm_sframes_t n = 0;
2442
2443 snd_pcm_stream_lock_irq(substream);
2444 switch (runtime->status->state) {
2445 case SNDRV_PCM_STATE_DRAINING:
2446 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2447 goto __badfd;
2448 case SNDRV_PCM_STATE_RUNNING:
2449 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2450 break;
2451 /* Fall through */
2452 case SNDRV_PCM_STATE_PREPARED:
2453 case SNDRV_PCM_STATE_SUSPENDED:
2454 err = 0;
2455 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2456 n = snd_pcm_playback_hw_avail(runtime);
2457 else
2458 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2459 n += runtime->delay;
1da177e4
LT		 2460 break;
2461 case SNDRV_PCM_STATE_XRUN:
2462 err = -EPIPE;
2463 break;
2464 default:
2465 __badfd:
2466 err = -EBADFD;
2467 break;
2468 }
2469 snd_pcm_stream_unlock_irq(substream);
2470 if (!err)
2471 if (put_user(n, res))
2472 err = -EFAULT;
2473 return err;
2474}
2475
877211f5
TI		 2476static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2477 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2478{
877211f5
TI		 2479 struct snd_pcm_runtime *runtime = substream->runtime;
2480 struct snd_pcm_sync_ptr sync_ptr;
2481 volatile struct snd_pcm_mmap_status *status;
2482 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2483 int err;
2484
2485 memset(&sync_ptr, 0, sizeof(sync_ptr));
2486 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2487 return -EFAULT;
877211f5 2488 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2489 return -EFAULT;
2490 status = runtime->status;
2491 control = runtime->control;
2492 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2493 err = snd_pcm_hwsync(substream);
2494 if (err < 0)
2495 return err;
2496 }
2497 snd_pcm_stream_lock_irq(substream);
2498 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2499 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2500 else
2501 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2502 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2503 control->avail_min = sync_ptr.c.control.avail_min;
2504 else
2505 sync_ptr.c.control.avail_min = control->avail_min;
2506 sync_ptr.s.status.state = status->state;
2507 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2508 sync_ptr.s.status.tstamp = status->tstamp;
2509 sync_ptr.s.status.suspended_state = status->suspended_state;
2510 snd_pcm_stream_unlock_irq(substream);
2511 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2512 return -EFAULT;
2513 return 0;
2514}
b751eef1
JK		 2515
2516static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2517{
2518 struct snd_pcm_runtime *runtime = substream->runtime;
2519 int arg;
2520
2521 if (get_user(arg, _arg))
2522 return -EFAULT;
2523 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2524 return -EINVAL;
2525 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2526 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2527 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2528 return 0;
2529}
1da177e4 2530
0df63e44
TI		 2531static int snd_pcm_common_ioctl1(struct file *file,
2532 struct snd_pcm_substream *substream,
1da177e4
LT		 2533 unsigned int cmd, void __user *arg)
2534{
1da177e4
LT		 2535 switch (cmd) {
2536 case SNDRV_PCM_IOCTL_PVERSION:
2537 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2538 case SNDRV_PCM_IOCTL_INFO:
2539 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2540 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2541 return 0;
b751eef1
JK		 2542 case SNDRV_PCM_IOCTL_TTSTAMP:
2543 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2544 case SNDRV_PCM_IOCTL_HW_REFINE:
2545 return snd_pcm_hw_refine_user(substream, arg);
2546 case SNDRV_PCM_IOCTL_HW_PARAMS:
2547 return snd_pcm_hw_params_user(substream, arg);
2548 case SNDRV_PCM_IOCTL_HW_FREE:
2549 return snd_pcm_hw_free(substream);
2550 case SNDRV_PCM_IOCTL_SW_PARAMS:
2551 return snd_pcm_sw_params_user(substream, arg);
2552 case SNDRV_PCM_IOCTL_STATUS:
2553 return snd_pcm_status_user(substream, arg);
2554 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2555 return snd_pcm_channel_info_user(substream, arg);
2556 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2557 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2558 case SNDRV_PCM_IOCTL_RESET:
2559 return snd_pcm_reset(substream);
2560 case SNDRV_PCM_IOCTL_START:
2561 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2562 case SNDRV_PCM_IOCTL_LINK:
2563 return snd_pcm_link(substream, (int)(unsigned long) arg);
2564 case SNDRV_PCM_IOCTL_UNLINK:
2565 return snd_pcm_unlink(substream);
2566 case SNDRV_PCM_IOCTL_RESUME:
2567 return snd_pcm_resume(substream);
2568 case SNDRV_PCM_IOCTL_XRUN:
2569 return snd_pcm_xrun(substream);
2570 case SNDRV_PCM_IOCTL_HWSYNC:
2571 return snd_pcm_hwsync(substream);
2572 case SNDRV_PCM_IOCTL_DELAY:
2573 return snd_pcm_delay(substream, arg);
2574 case SNDRV_PCM_IOCTL_SYNC_PTR:
2575 return snd_pcm_sync_ptr(substream, arg);
59d48582 2576#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2577 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2578 return snd_pcm_hw_refine_old_user(substream, arg);
2579 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2580 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2581#endif
1da177e4 2582 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2583 return snd_pcm_drain(substream, file);
1da177e4
LT		 2584 case SNDRV_PCM_IOCTL_DROP:
2585 return snd_pcm_drop(substream);
e661d0dd
TI		 2586 case SNDRV_PCM_IOCTL_PAUSE:
2587 {
2588 int res;
2589 snd_pcm_stream_lock_irq(substream);
2590 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2591 snd_pcm_stream_unlock_irq(substream);
2592 return res;
2593 }
1da177e4
LT		 2594 }
2595 snd_printd("unknown ioctl = 0x%x\n", cmd);
2596 return -ENOTTY;
2597}
2598
0df63e44
TI		 2599static int snd_pcm_playback_ioctl1(struct file *file,
2600 struct snd_pcm_substream *substream,
1da177e4
LT		 2601 unsigned int cmd, void __user *arg)
2602{
7eaa943c
TI		 2603 if (snd_BUG_ON(!substream))
2604 return -ENXIO;
2605 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2606 return -EINVAL;
1da177e4
LT		 2607 switch (cmd) {
2608 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2609 {
877211f5
TI		 2610 struct snd_xferi xferi;
2611 struct snd_xferi __user *_xferi = arg;
2612 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2613 snd_pcm_sframes_t result;
2614 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2615 return -EBADFD;
2616 if (put_user(0, &_xferi->result))
2617 return -EFAULT;
2618 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2619 return -EFAULT;
2620 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2621 __put_user(result, &_xferi->result);
2622 return result < 0 ? result : 0;
2623 }
2624 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2625 {
877211f5
TI		 2626 struct snd_xfern xfern;
2627 struct snd_xfern __user *_xfern = arg;
2628 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2629 void __user **bufs;
2630 snd_pcm_sframes_t result;
2631 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2632 return -EBADFD;
2633 if (runtime->channels > 128)
2634 return -EINVAL;
2635 if (put_user(0, &_xfern->result))
2636 return -EFAULT;
2637 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2638 return -EFAULT;
ef44a1ec
LZ		 2639
2640 bufs = memdup_user(xfern.bufs,
2641 sizeof(void *) * runtime->channels);
2642 if (IS_ERR(bufs))
2643 return PTR_ERR(bufs);
1da177e4
LT		 2644 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2645 kfree(bufs);
2646 __put_user(result, &_xfern->result);
2647 return result < 0 ? result : 0;
2648 }
2649 case SNDRV_PCM_IOCTL_REWIND:
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_rewind(substream, frames);
2659 __put_user(result, _frames);
2660 return result < 0 ? result : 0;
2661 }
2662 case SNDRV_PCM_IOCTL_FORWARD:
2663 {
2664 snd_pcm_uframes_t frames;
2665 snd_pcm_uframes_t __user *_frames = arg;
2666 snd_pcm_sframes_t result;
2667 if (get_user(frames, _frames))
2668 return -EFAULT;
2669 if (put_user(0, _frames))
2670 return -EFAULT;
2671 result = snd_pcm_playback_forward(substream, frames);
2672 __put_user(result, _frames);
2673 return result < 0 ? result : 0;
2674 }
1da177e4 2675 }
0df63e44 2676 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2677}
2678
0df63e44
TI		 2679static int snd_pcm_capture_ioctl1(struct file *file,
2680 struct snd_pcm_substream *substream,
1da177e4
LT		 2681 unsigned int cmd, void __user *arg)
2682{
7eaa943c
TI		 2683 if (snd_BUG_ON(!substream))
2684 return -ENXIO;
2685 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2686 return -EINVAL;
1da177e4
LT		 2687 switch (cmd) {
2688 case SNDRV_PCM_IOCTL_READI_FRAMES:
2689 {
877211f5
TI		 2690 struct snd_xferi xferi;
2691 struct snd_xferi __user *_xferi = arg;
2692 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2693 snd_pcm_sframes_t result;
2694 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2695 return -EBADFD;
2696 if (put_user(0, &_xferi->result))
2697 return -EFAULT;
2698 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2699 return -EFAULT;
2700 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2701 __put_user(result, &_xferi->result);
2702 return result < 0 ? result : 0;
2703 }
2704 case SNDRV_PCM_IOCTL_READN_FRAMES:
2705 {
877211f5
TI		 2706 struct snd_xfern xfern;
2707 struct snd_xfern __user *_xfern = arg;
2708 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2709 void *bufs;
2710 snd_pcm_sframes_t result;
2711 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2712 return -EBADFD;
2713 if (runtime->channels > 128)
2714 return -EINVAL;
2715 if (put_user(0, &_xfern->result))
2716 return -EFAULT;
2717 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2718 return -EFAULT;
ef44a1ec
LZ		 2719
2720 bufs = memdup_user(xfern.bufs,
2721 sizeof(void *) * runtime->channels);
2722 if (IS_ERR(bufs))
2723 return PTR_ERR(bufs);
1da177e4
LT		 2724 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2725 kfree(bufs);
2726 __put_user(result, &_xfern->result);
2727 return result < 0 ? result : 0;
2728 }
2729 case SNDRV_PCM_IOCTL_REWIND:
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_rewind(substream, frames);
2739 __put_user(result, _frames);
2740 return result < 0 ? result : 0;
2741 }
2742 case SNDRV_PCM_IOCTL_FORWARD:
2743 {
2744 snd_pcm_uframes_t frames;
2745 snd_pcm_uframes_t __user *_frames = arg;
2746 snd_pcm_sframes_t result;
2747 if (get_user(frames, _frames))
2748 return -EFAULT;
2749 if (put_user(0, _frames))
2750 return -EFAULT;
2751 result = snd_pcm_capture_forward(substream, frames);
2752 __put_user(result, _frames);
2753 return result < 0 ? result : 0;
2754 }
2755 }
0df63e44 2756 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2757}
2758
877211f5
TI		 2759static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2760 unsigned long arg)
1da177e4 2761{
877211f5 2762 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2763
2764 pcm_file = file->private_data;
2765
2766 if (((cmd >> 8) & 0xff) != 'A')
2767 return -ENOTTY;
2768
0df63e44
TI		 2769 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2770 (void __user *)arg);
1da177e4
LT		 2771}
2772
877211f5
TI		 2773static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2774 unsigned long arg)
1da177e4 2775{
877211f5 2776 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2777
2778 pcm_file = file->private_data;
2779
2780 if (((cmd >> 8) & 0xff) != 'A')
2781 return -ENOTTY;
2782
0df63e44
TI		 2783 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2784 (void __user *)arg);
1da177e4
LT		 2785}
2786
bf1bbb5a
TI		 2787int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2788 unsigned int cmd, void *arg)
1da177e4
LT		 2789{
2790 mm_segment_t fs;
2791 int result;
2792
2793 fs = snd_enter_user();
1da177e4
LT		 2794 switch (substream->stream) {
2795 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2796 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2797 (void __user *)arg);
bf1bbb5a 2798 break;
1da177e4 2799 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2800 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2801 (void __user *)arg);
bf1bbb5a 2802 break;
1da177e4 2803 default:
bf1bbb5a
TI		 2804 result = -EINVAL;
2805 break;
1da177e4 2806 }
bf1bbb5a
TI		 2807 snd_leave_user(fs);
2808 return result;
1da177e4
LT		 2809}
2810
e88e8ae6
TI		 2811EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2812
877211f5
TI		 2813static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2814 loff_t * offset)
1da177e4 2815{
877211f5
TI		 2816 struct snd_pcm_file *pcm_file;
2817 struct snd_pcm_substream *substream;
2818 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2819 snd_pcm_sframes_t result;
2820
2821 pcm_file = file->private_data;
2822 substream = pcm_file->substream;
7eaa943c
TI		 2823 if (PCM_RUNTIME_CHECK(substream))
2824 return -ENXIO;
1da177e4
LT		 2825 runtime = substream->runtime;
2826 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2827 return -EBADFD;
2828 if (!frame_aligned(runtime, count))
2829 return -EINVAL;
2830 count = bytes_to_frames(runtime, count);
2831 result = snd_pcm_lib_read(substream, buf, count);
2832 if (result > 0)
2833 result = frames_to_bytes(runtime, result);
2834 return result;
2835}
2836
877211f5
TI		 2837static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2838 size_t count, loff_t * offset)
1da177e4 2839{
877211f5
TI		 2840 struct snd_pcm_file *pcm_file;
2841 struct snd_pcm_substream *substream;
2842 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2843 snd_pcm_sframes_t result;
2844
2845 pcm_file = file->private_data;
2846 substream = pcm_file->substream;
7eaa943c
TI		 2847 if (PCM_RUNTIME_CHECK(substream))
2848 return -ENXIO;
1da177e4 2849 runtime = substream->runtime;
7eaa943c
TI		 2850 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2851 return -EBADFD;
2852 if (!frame_aligned(runtime, count))
2853 return -EINVAL;
1da177e4
LT		 2854 count = bytes_to_frames(runtime, count);
2855 result = snd_pcm_lib_write(substream, buf, count);
2856 if (result > 0)
2857 result = frames_to_bytes(runtime, result);
1da177e4
LT		 2858 return result;
2859}
2860
ee0b3e67
BP		 2861static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2862 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2863
2864{
877211f5
TI		 2865 struct snd_pcm_file *pcm_file;
2866 struct snd_pcm_substream *substream;
2867 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2868 snd_pcm_sframes_t result;
2869 unsigned long i;
2870 void __user **bufs;
2871 snd_pcm_uframes_t frames;
2872
ee0b3e67 2873 pcm_file = iocb->ki_filp->private_data;
1da177e4 2874 substream = pcm_file->substream;
7eaa943c
TI		 2875 if (PCM_RUNTIME_CHECK(substream))
2876 return -ENXIO;
1da177e4
LT		 2877 runtime = substream->runtime;
2878 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2879 return -EBADFD;
ee0b3e67 2880 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2881 return -EINVAL;
ee0b3e67 2882 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2883 return -EINVAL;
ee0b3e67
BP		 2884 frames = bytes_to_samples(runtime, iov->iov_len);
2885 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2886 if (bufs == NULL)
2887 return -ENOMEM;
ee0b3e67
BP		 2888 for (i = 0; i < nr_segs; ++i)
2889 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2890 result = snd_pcm_lib_readv(substream, bufs, frames);
2891 if (result > 0)
2892 result = frames_to_bytes(runtime, result);
2893 kfree(bufs);
2894 return result;
2895}
2896
ee0b3e67
BP		 2897static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2898 unsigned long nr_segs, loff_t pos)
1da177e4 2899{
877211f5
TI		 2900 struct snd_pcm_file *pcm_file;
2901 struct snd_pcm_substream *substream;
2902 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2903 snd_pcm_sframes_t result;
2904 unsigned long i;
2905 void __user **bufs;
2906 snd_pcm_uframes_t frames;
2907
ee0b3e67 2908 pcm_file = iocb->ki_filp->private_data;
1da177e4 2909 substream = pcm_file->substream;
7eaa943c
TI		 2910 if (PCM_RUNTIME_CHECK(substream))
2911 return -ENXIO;
1da177e4 2912 runtime = substream->runtime;
7eaa943c
TI		 2913 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2914 return -EBADFD;
ee0b3e67 2915 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 2916 !frame_aligned(runtime, iov->iov_len))
2917 return -EINVAL;
ee0b3e67
BP		 2918 frames = bytes_to_samples(runtime, iov->iov_len);
2919 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2920 if (bufs == NULL)
2921 return -ENOMEM;
ee0b3e67
BP		 2922 for (i = 0; i < nr_segs; ++i)
2923 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2924 result = snd_pcm_lib_writev(substream, bufs, frames);
2925 if (result > 0)
2926 result = frames_to_bytes(runtime, result);
2927 kfree(bufs);
1da177e4
LT		 2928 return result;
2929}
2930
2931static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2932{
877211f5
TI		 2933 struct snd_pcm_file *pcm_file;
2934 struct snd_pcm_substream *substream;
2935 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2936 unsigned int mask;
2937 snd_pcm_uframes_t avail;
2938
2939 pcm_file = file->private_data;
2940
2941 substream = pcm_file->substream;
7eaa943c
TI		 2942 if (PCM_RUNTIME_CHECK(substream))
2943 return -ENXIO;
1da177e4
LT		 2944 runtime = substream->runtime;
2945
2946 poll_wait(file, &runtime->sleep, wait);
2947
2948 snd_pcm_stream_lock_irq(substream);
2949 avail = snd_pcm_playback_avail(runtime);
2950 switch (runtime->status->state) {
2951 case SNDRV_PCM_STATE_RUNNING:
2952 case SNDRV_PCM_STATE_PREPARED:
2953 case SNDRV_PCM_STATE_PAUSED:
2954 if (avail >= runtime->control->avail_min) {
2955 mask = POLLOUT | POLLWRNORM;
2956 break;
2957 }
2958 /* Fall through */
2959 case SNDRV_PCM_STATE_DRAINING:
2960 mask = 0;
2961 break;
2962 default:
2963 mask = POLLOUT | POLLWRNORM | POLLERR;
2964 break;
2965 }
2966 snd_pcm_stream_unlock_irq(substream);
2967 return mask;
2968}
2969
2970static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2971{
877211f5
TI		 2972 struct snd_pcm_file *pcm_file;
2973 struct snd_pcm_substream *substream;
2974 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2975 unsigned int mask;
2976 snd_pcm_uframes_t avail;
2977
2978 pcm_file = file->private_data;
2979
2980 substream = pcm_file->substream;
7eaa943c
TI		 2981 if (PCM_RUNTIME_CHECK(substream))
2982 return -ENXIO;
1da177e4
LT		 2983 runtime = substream->runtime;
2984
2985 poll_wait(file, &runtime->sleep, wait);
2986
2987 snd_pcm_stream_lock_irq(substream);
2988 avail = snd_pcm_capture_avail(runtime);
2989 switch (runtime->status->state) {
2990 case SNDRV_PCM_STATE_RUNNING:
2991 case SNDRV_PCM_STATE_PREPARED:
2992 case SNDRV_PCM_STATE_PAUSED:
2993 if (avail >= runtime->control->avail_min) {
2994 mask = POLLIN | POLLRDNORM;
2995 break;
2996 }
2997 mask = 0;
2998 break;
2999 case SNDRV_PCM_STATE_DRAINING:
3000 if (avail > 0) {
3001 mask = POLLIN | POLLRDNORM;
3002 break;
3003 }
3004 /* Fall through */
3005 default:
3006 mask = POLLIN | POLLRDNORM | POLLERR;
3007 break;
3008 }
3009 snd_pcm_stream_unlock_irq(substream);
3010 return mask;
3011}
3012
3013/*
3014 * mmap support
3015 */
3016
3017/*
3018 * Only on coherent architectures, we can mmap the status and the control records
3019 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3020 */
3021#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3022/*
3023 * mmap status record
3024 */
3ad5afcd
NP		 3025static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3026 struct vm_fault *vmf)
1da177e4 3027{
877211f5
TI		 3028 struct snd_pcm_substream *substream = area->vm_private_data;
3029 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3030
3031 if (substream == NULL)
3ad5afcd 3032 return VM_FAULT_SIGBUS;
1da177e4 3033 runtime = substream->runtime;
3ad5afcd
NP		 3034 vmf->page = virt_to_page(runtime->status);
3035 get_page(vmf->page);
3036 return 0;
1da177e4
LT		 3037}
3038
f0f37e2f 3039static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3040{
3ad5afcd 3041 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3042};
3043
877211f5 3044static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3045 struct vm_area_struct *area)
3046{
1da177e4
LT		 3047 long size;
3048 if (!(area->vm_flags & VM_READ))
3049 return -EINVAL;
1da177e4 3050 size = area->vm_end - area->vm_start;
877211f5 3051 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3052 return -EINVAL;
3053 area->vm_ops = &snd_pcm_vm_ops_status;
3054 area->vm_private_data = substream;
314e51b9 3055 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3056 return 0;
3057}
3058
3059/*
3060 * mmap control record
3061 */
3ad5afcd
NP		 3062static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3063 struct vm_fault *vmf)
1da177e4 3064{
877211f5
TI		 3065 struct snd_pcm_substream *substream = area->vm_private_data;
3066 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3067
3068 if (substream == NULL)
3ad5afcd 3069 return VM_FAULT_SIGBUS;
1da177e4 3070 runtime = substream->runtime;
3ad5afcd
NP		 3071 vmf->page = virt_to_page(runtime->control);
3072 get_page(vmf->page);
3073 return 0;
1da177e4
LT		 3074}
3075
f0f37e2f 3076static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3077{
3ad5afcd 3078 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3079};
3080
877211f5 3081static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3082 struct vm_area_struct *area)
3083{
1da177e4
LT		 3084 long size;
3085 if (!(area->vm_flags & VM_READ))
3086 return -EINVAL;
1da177e4 3087 size = area->vm_end - area->vm_start;
877211f5 3088 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3089 return -EINVAL;
3090 area->vm_ops = &snd_pcm_vm_ops_control;
3091 area->vm_private_data = substream;
314e51b9 3092 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3093 return 0;
3094}
3095#else /* ! coherent mmap */
3096/*
3097 * don't support mmap for status and control records.
3098 */
877211f5 3099static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3100 struct vm_area_struct *area)
3101{
3102 return -ENXIO;
3103}
877211f5 3104static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3105 struct vm_area_struct *area)
3106{
3107 return -ENXIO;
3108}
3109#endif /* coherent mmap */
3110
9eb4a067
TI		 3111static inline struct page *
3112snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3113{
3114 void *vaddr = substream->runtime->dma_area + ofs;
66b6cfac
TI		 3115#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3116 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3117 return virt_to_page(CAC_ADDR(vaddr));
6985c887
TI		 3118#endif
3119#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3120 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3121 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3122 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3123 /* assume dma_handle set via pfn_to_phys() in
3124 * mm/dma-noncoherent.c
3125 */
3126 return pfn_to_page(addr >> PAGE_SHIFT);
3127 }
66b6cfac 3128#endif
9eb4a067
TI		 3129 return virt_to_page(vaddr);
3130}
3131
1da177e4 3132/*
3ad5afcd 3133 * fault callback for mmapping a RAM page
1da177e4 3134 */
3ad5afcd
NP		 3135static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3136 struct vm_fault *vmf)
1da177e4 3137{
877211f5
TI		 3138 struct snd_pcm_substream *substream = area->vm_private_data;
3139 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3140 unsigned long offset;
3141 struct page * page;
1da177e4
LT		 3142 size_t dma_bytes;
3143
3144 if (substream == NULL)
3ad5afcd 3145 return VM_FAULT_SIGBUS;
1da177e4 3146 runtime = substream->runtime;
3ad5afcd 3147 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3148 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3149 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3150 return VM_FAULT_SIGBUS;
9eb4a067 3151 if (substream->ops->page)
1da177e4 3152 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3153 else
3154 page = snd_pcm_default_page_ops(substream, offset);
3155 if (!page)
3156 return VM_FAULT_SIGBUS;
b5810039 3157 get_page(page);
3ad5afcd
NP		 3158 vmf->page = page;
3159 return 0;
1da177e4
LT		 3160}
3161
657b1989
TI		 3162static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3163 .open = snd_pcm_mmap_data_open,
3164 .close = snd_pcm_mmap_data_close,
3165};
3166
3167static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3168 .open = snd_pcm_mmap_data_open,
3169 .close = snd_pcm_mmap_data_close,
3ad5afcd 3170 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3171};
3172
657b1989
TI		 3173#ifndef ARCH_HAS_DMA_MMAP_COHERENT
3174/* This should be defined / handled globally! */
3175#ifdef CONFIG_ARM
3176#define ARCH_HAS_DMA_MMAP_COHERENT
3177#endif
3178#endif
3179
1da177e4
LT		 3180/*
3181 * mmap the DMA buffer on RAM
3182 */
18a2b962
TI		 3183int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3184 struct vm_area_struct *area)
1da177e4 3185{
314e51b9 3186 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
657b1989
TI		 3187#ifdef ARCH_HAS_DMA_MMAP_COHERENT
3188 if (!substream->ops->page &&
3189 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3190 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3191 area,
3192 substream->runtime->dma_area,
3193 substream->runtime->dma_addr,
3194 area->vm_end - area->vm_start);
9fe17b5d
TI		 3195#elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3196 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3197 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3198 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
657b1989
TI		 3199#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3200 /* mmap with fault handler */
3201 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3202 return 0;
3203}
18a2b962 3204EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3205
3206/*
3207 * mmap the DMA buffer on I/O memory area
3208 */
3209#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3210int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3211 struct vm_area_struct *area)
1da177e4
LT		 3212{
3213 long size;
3214 unsigned long offset;
3215
1da177e4 3216 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
1da177e4
LT		 3217 area->vm_flags |= VM_IO;
3218 size = area->vm_end - area->vm_start;
3219 offset = area->vm_pgoff << PAGE_SHIFT;
3220 if (io_remap_pfn_range(area, area->vm_start,
3221 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3222 size, area->vm_page_prot))
3223 return -EAGAIN;
1da177e4
LT		 3224 return 0;
3225}
e88e8ae6
TI		 3226
3227EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3228#endif /* SNDRV_PCM_INFO_MMAP */
3229
3230/*
3231 * mmap DMA buffer
3232 */
877211f5 3233int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3234 struct vm_area_struct *area)
3235{
877211f5 3236 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3237 long size;
3238 unsigned long offset;
3239 size_t dma_bytes;
657b1989 3240 int err;
1da177e4
LT		 3241
3242 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3243 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3244 return -EINVAL;
3245 } else {
3246 if (!(area->vm_flags & VM_READ))
3247 return -EINVAL;
3248 }
3249 runtime = substream->runtime;
1da177e4
LT		 3250 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3251 return -EBADFD;
3252 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3253 return -ENXIO;
3254 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3255 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3256 return -EINVAL;
3257 size = area->vm_end - area->vm_start;
3258 offset = area->vm_pgoff << PAGE_SHIFT;
3259 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3260 if ((size_t)size > dma_bytes)
3261 return -EINVAL;
3262 if (offset > dma_bytes - size)
3263 return -EINVAL;
3264
657b1989
TI		 3265 area->vm_ops = &snd_pcm_vm_ops_data;
3266 area->vm_private_data = substream;
1da177e4 3267 if (substream->ops->mmap)
657b1989 3268 err = substream->ops->mmap(substream, area);
1da177e4 3269 else
18a2b962 3270 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3271 if (!err)
3272 atomic_inc(&substream->mmap_count);
3273 return err;
1da177e4
LT		 3274}
3275
e88e8ae6
TI		 3276EXPORT_SYMBOL(snd_pcm_mmap_data);
3277
1da177e4
LT		 3278static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3279{
877211f5
TI		 3280 struct snd_pcm_file * pcm_file;
3281 struct snd_pcm_substream *substream;
1da177e4
LT		 3282 unsigned long offset;
3283
3284 pcm_file = file->private_data;
3285 substream = pcm_file->substream;
7eaa943c
TI		 3286 if (PCM_RUNTIME_CHECK(substream))
3287 return -ENXIO;
1da177e4
LT		 3288
3289 offset = area->vm_pgoff << PAGE_SHIFT;
3290 switch (offset) {
3291 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3292 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3293 return -ENXIO;
3294 return snd_pcm_mmap_status(substream, file, area);
3295 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3296 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3297 return -ENXIO;
3298 return snd_pcm_mmap_control(substream, file, area);
3299 default:
3300 return snd_pcm_mmap_data(substream, file, area);
3301 }
3302 return 0;
3303}
3304
3305static int snd_pcm_fasync(int fd, struct file * file, int on)
3306{
877211f5
TI		 3307 struct snd_pcm_file * pcm_file;
3308 struct snd_pcm_substream *substream;
3309 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3310
3311 pcm_file = file->private_data;
3312 substream = pcm_file->substream;
7eaa943c 3313 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3314 return -ENXIO;
1da177e4 3315 runtime = substream->runtime;
d05468b7 3316 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3317}
3318
3319/*
3320 * ioctl32 compat
3321 */
3322#ifdef CONFIG_COMPAT
3323#include "pcm_compat.c"
3324#else
3325#define snd_pcm_ioctl_compat NULL
3326#endif
3327
3328/*
3329 * To be removed helpers to keep binary compatibility
3330 */
3331
59d48582 3332#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3333#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3334#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3335
877211f5
TI		 3336static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3337 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3338{
3339 unsigned int i;
3340
3341 memset(params, 0, sizeof(*params));
3342 params->flags = oparams->flags;
3343 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3344 params->masks[i].bits[0] = oparams->masks[i];
3345 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3346 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3347 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3348 params->info = oparams->info;
3349 params->msbits = oparams->msbits;
3350 params->rate_num = oparams->rate_num;
3351 params->rate_den = oparams->rate_den;
3352 params->fifo_size = oparams->fifo_size;
3353}
3354
877211f5
TI		 3355static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3356 struct snd_pcm_hw_params *params)
1da177e4
LT		 3357{
3358 unsigned int i;
3359
3360 memset(oparams, 0, sizeof(*oparams));
3361 oparams->flags = params->flags;
3362 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3363 oparams->masks[i] = params->masks[i].bits[0];
3364 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3365 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3366 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3367 oparams->info = params->info;
3368 oparams->msbits = params->msbits;
3369 oparams->rate_num = params->rate_num;
3370 oparams->rate_den = params->rate_den;
3371 oparams->fifo_size = params->fifo_size;
3372}
3373
877211f5
TI		 3374static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3375 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3376{
877211f5
TI		 3377 struct snd_pcm_hw_params *params;
3378 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3379 int err;
3380
3381 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3382 if (!params)
3383 return -ENOMEM;
1da177e4 3384
ef44a1ec
LZ		 3385 oparams = memdup_user(_oparams, sizeof(*oparams));
3386 if (IS_ERR(oparams)) {
3387 err = PTR_ERR(oparams);
1da177e4
LT		 3388 goto out;
3389 }
3390 snd_pcm_hw_convert_from_old_params(params, oparams);
3391 err = snd_pcm_hw_refine(substream, params);
3392 snd_pcm_hw_convert_to_old_params(oparams, params);
3393 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3394 if (!err)
3395 err = -EFAULT;
3396 }
ef44a1ec
LZ		 3397
3398 kfree(oparams);
1da177e4
LT		 3399out:
3400 kfree(params);
1da177e4
LT		 3401 return err;
3402}
3403
877211f5
TI		 3404static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3405 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3406{
877211f5
TI		 3407 struct snd_pcm_hw_params *params;
3408 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3409 int err;
3410
3411 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3412 if (!params)
3413 return -ENOMEM;
3414
3415 oparams = memdup_user(_oparams, sizeof(*oparams));
3416 if (IS_ERR(oparams)) {
3417 err = PTR_ERR(oparams);
1da177e4
LT		 3418 goto out;
3419 }
3420 snd_pcm_hw_convert_from_old_params(params, oparams);
3421 err = snd_pcm_hw_params(substream, params);
3422 snd_pcm_hw_convert_to_old_params(oparams, params);
3423 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3424 if (!err)
3425 err = -EFAULT;
3426 }
ef44a1ec
LZ		 3427
3428 kfree(oparams);
1da177e4
LT		 3429out:
3430 kfree(params);
1da177e4
LT		 3431 return err;
3432}
59d48582 3433#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3434
7003609b 3435#ifndef CONFIG_MMU
55c63bd2
DG		 3436static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3437 unsigned long addr,
3438 unsigned long len,
3439 unsigned long pgoff,
3440 unsigned long flags)
3441{
3442 struct snd_pcm_file *pcm_file = file->private_data;
3443 struct snd_pcm_substream *substream = pcm_file->substream;
3444 struct snd_pcm_runtime *runtime = substream->runtime;
3445 unsigned long offset = pgoff << PAGE_SHIFT;
3446
3447 switch (offset) {
3448 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3449 return (unsigned long)runtime->status;
3450 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3451 return (unsigned long)runtime->control;
3452 default:
3453 return (unsigned long)runtime->dma_area + offset;
3454 }
7003609b
CC		 3455}
3456#else
55c63bd2 3457# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3458#endif
3459
1da177e4
LT		 3460/*
3461 * Register section
3462 */
3463
9c2e08c5 3464const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3465 {
2af677fc
CL		 3466 .owner = THIS_MODULE,
3467 .write = snd_pcm_write,
ee0b3e67 3468 .aio_write = snd_pcm_aio_write,
f87135f5 3469 .open = snd_pcm_playback_open,
2af677fc 3470 .release = snd_pcm_release,
02f4865f 3471 .llseek = no_llseek,
2af677fc
CL		 3472 .poll = snd_pcm_playback_poll,
3473 .unlocked_ioctl = snd_pcm_playback_ioctl,
3474 .compat_ioctl = snd_pcm_ioctl_compat,
3475 .mmap = snd_pcm_mmap,
3476 .fasync = snd_pcm_fasync,
55c63bd2 3477 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3478 },
3479 {
2af677fc
CL		 3480 .owner = THIS_MODULE,
3481 .read = snd_pcm_read,
ee0b3e67 3482 .aio_read = snd_pcm_aio_read,
f87135f5 3483 .open = snd_pcm_capture_open,
2af677fc 3484 .release = snd_pcm_release,
02f4865f 3485 .llseek = no_llseek,
2af677fc
CL		 3486 .poll = snd_pcm_capture_poll,
3487 .unlocked_ioctl = snd_pcm_capture_ioctl,
3488 .compat_ioctl = snd_pcm_ioctl_compat,
3489 .mmap = snd_pcm_mmap,
3490 .fasync = snd_pcm_fasync,
55c63bd2 3491 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3492 }
3493};
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